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Merge tag 'pm-6.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
[linux-2.6-block.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
d5bb994b 1// SPDX-License-Identifier: GPL-2.0-or-later
032c5e82
TF		 2/**************************************************************************/
3/* */
4/* IBM System i and System p Virtual NIC Device Driver */
5/* Copyright (C) 2014 IBM Corp. */
6/* Santiago Leon (santi_leon@yahoo.com) */
7/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
8/* John Allen (jallen@linux.vnet.ibm.com) */
9/* */
032c5e82
TF		 10/* */
11/* This module contains the implementation of a virtual ethernet device */
12/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
13/* option of the RS/6000 Platform Architecture to interface with virtual */
14/* ethernet NICs that are presented to the partition by the hypervisor. */
15/* */
16/* Messages are passed between the VNIC driver and the VNIC server using */
17/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
18/* issue and receive commands that initiate communication with the server */
19/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
20/* are used by the driver to notify the server that a packet is */
21/* ready for transmission or that a buffer has been added to receive a */
22/* packet. Subsequently, sCRQs are used by the server to notify the */
23/* driver that a packet transmission has been completed or that a packet */
24/* has been received and placed in a waiting buffer. */
25/* */
26/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
27/* which skbs are DMA mapped and immediately unmapped when the transmit */
28/* or receive has been completed, the VNIC driver is required to use */
29/* "long term mapping". This entails that large, continuous DMA mapped */
30/* buffers are allocated on driver initialization and these buffers are */
31/* then continuously reused to pass skbs to and from the VNIC server. */
32/* */
33/**************************************************************************/
34
35#include <linux/module.h>
36#include <linux/moduleparam.h>
37#include <linux/types.h>
38#include <linux/errno.h>
39#include <linux/completion.h>
40#include <linux/ioport.h>
41#include <linux/dma-mapping.h>
42#include <linux/kernel.h>
43#include <linux/netdevice.h>
44#include <linux/etherdevice.h>
45#include <linux/skbuff.h>
46#include <linux/init.h>
47#include <linux/delay.h>
48#include <linux/mm.h>
49#include <linux/ethtool.h>
50#include <linux/proc_fs.h>
4eb50ceb 51#include <linux/if_arp.h>
032c5e82
TF		 52#include <linux/in.h>
53#include <linux/ip.h>
ad7775dc 54#include <linux/ipv6.h>
032c5e82 55#include <linux/irq.h>
6bff3ffc 56#include <linux/irqdomain.h>
032c5e82
TF		 57#include <linux/kthread.h>
58#include <linux/seq_file.h>
032c5e82
TF		 59#include <linux/interrupt.h>
60#include <net/net_namespace.h>
61#include <asm/hvcall.h>
62#include <linux/atomic.h>
63#include <asm/vio.h>
7ea0c16a 64#include <asm/xive.h>
032c5e82
TF		 65#include <asm/iommu.h>
66#include <linux/uaccess.h>
67#include <asm/firmware.h>
65dc6891 68#include <linux/workqueue.h>
6052d5e2 69#include <linux/if_vlan.h>
37798d02 70#include <linux/utsname.h>
44fbc1b6 71#include <linux/cpu.h>
032c5e82
TF		 72
73#include "ibmvnic.h"
74
75static const char ibmvnic_driver_name[] = "ibmvnic";
76static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
77
78b07ac1 78MODULE_AUTHOR("Santiago Leon");
032c5e82
TF		 79MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
80MODULE_LICENSE("GPL");
81MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
82
83static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
d7c0ef36 84static void release_sub_crqs(struct ibmvnic_adapter *, bool);
032c5e82
TF		 85static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
86static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
87static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
88static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
ad7775dc 89static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 90static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
91static int enable_scrq_irq(struct ibmvnic_adapter *,
92 struct ibmvnic_sub_crq_queue *);
93static int disable_scrq_irq(struct ibmvnic_adapter *,
94 struct ibmvnic_sub_crq_queue *);
95static int pending_scrq(struct ibmvnic_adapter *,
96 struct ibmvnic_sub_crq_queue *);
97static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
98 struct ibmvnic_sub_crq_queue *);
99static int ibmvnic_poll(struct napi_struct *napi, int data);
23cc5f66
NC		 100static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter);
101static inline void reinit_init_done(struct ibmvnic_adapter *adapter);
69980d02 102static void send_query_map(struct ibmvnic_adapter *adapter);
673ead24 103static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8);
9c4eaabd 104static int send_request_unmap(struct ibmvnic_adapter *, u8);
20a8ab74 105static int send_login(struct ibmvnic_adapter *adapter);
491099ad 106static void send_query_cap(struct ibmvnic_adapter *adapter);
4d96f12a 107static int init_sub_crqs(struct ibmvnic_adapter *);
bd0b6723 108static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
635e442f 109static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
f992887c 110static void release_crq_queue(struct ibmvnic_adapter *);
62740e97 111static int __ibmvnic_set_mac(struct net_device *, u8 *);
30f79625 112static int init_crq_queue(struct ibmvnic_adapter *adapter);
f8d6ae0d 113static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
65d6470d
SB		 114static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
115 struct ibmvnic_sub_crq_queue *tx_scrq);
f8ac0bfa
SB		 116static void free_long_term_buff(struct ibmvnic_adapter *adapter,
117 struct ibmvnic_long_term_buff *ltb);
61772b09 118static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter);
6db541ae 119static void flush_reset_queue(struct ibmvnic_adapter *adapter);
74839f7a 120static void print_subcrq_error(struct device *dev, int rc, const char *func);
032c5e82
TF		 121
122struct ibmvnic_stat {
123 char name[ETH_GSTRING_LEN];
124 int offset;
125};
126
127#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
128 offsetof(struct ibmvnic_statistics, stat))
91dc5d25 129#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off))))
032c5e82
TF		 130
131static const struct ibmvnic_stat ibmvnic_stats[] = {
132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
154};
155
53f8b1b2
CF		 156static int send_crq_init_complete(struct ibmvnic_adapter *adapter)
157{
158 union ibmvnic_crq crq;
159
160 memset(&crq, 0, sizeof(crq));
161 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
162 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
163
164 return ibmvnic_send_crq(adapter, &crq);
165}
166
167static int send_version_xchg(struct ibmvnic_adapter *adapter)
168{
169 union ibmvnic_crq crq;
170
171 memset(&crq, 0, sizeof(crq));
172 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
173 crq.version_exchange.cmd = VERSION_EXCHANGE;
174 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
175
176 return ibmvnic_send_crq(adapter, &crq);
177}
178
44fbc1b6
NC		 179static void ibmvnic_clean_queue_affinity(struct ibmvnic_adapter *adapter,
180 struct ibmvnic_sub_crq_queue *queue)
181{
182 if (!(queue && queue->irq))
183 return;
184
185 cpumask_clear(queue->affinity_mask);
186
187 if (irq_set_affinity_and_hint(queue->irq, NULL))
188 netdev_warn(adapter->netdev,
189 "%s: Clear affinity failed, queue addr = %p, IRQ = %d\n",
190 __func__, queue, queue->irq);
191}
192
193static void ibmvnic_clean_affinity(struct ibmvnic_adapter *adapter)
194{
195 struct ibmvnic_sub_crq_queue **rxqs;
196 struct ibmvnic_sub_crq_queue **txqs;
197 int num_rxqs, num_txqs;
813f3662 198 int i;
44fbc1b6 199
44fbc1b6
NC		 200 rxqs = adapter->rx_scrq;
201 txqs = adapter->tx_scrq;
202 num_txqs = adapter->num_active_tx_scrqs;
203 num_rxqs = adapter->num_active_rx_scrqs;
204
205 netdev_dbg(adapter->netdev, "%s: Cleaning irq affinity hints", __func__);
206 if (txqs) {
207 for (i = 0; i < num_txqs; i++)
208 ibmvnic_clean_queue_affinity(adapter, txqs[i]);
209 }
210 if (rxqs) {
211 for (i = 0; i < num_rxqs; i++)
212 ibmvnic_clean_queue_affinity(adapter, rxqs[i]);
213 }
214}
215
216static int ibmvnic_set_queue_affinity(struct ibmvnic_sub_crq_queue *queue,
217 unsigned int *cpu, int *stragglers,
218 int stride)
219{
220 cpumask_var_t mask;
221 int i;
222 int rc = 0;
223
224 if (!(queue && queue->irq))
225 return rc;
226
227 /* cpumask_var_t is either a pointer or array, allocation works here */
228 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
229 return -ENOMEM;
230
231 /* while we have extra cpu give one extra to this irq */
232 if (*stragglers) {
233 stride++;
234 (*stragglers)--;
235 }
236 /* atomic write is safer than writing bit by bit directly */
2a402aa6
YN		 237 for_each_online_cpu_wrap(i, *cpu) {
238 if (!stride--) {
239 /* For the next queue we start from the first
240 * unused CPU in this queue
241 */
242 *cpu = i;
243 break;
244 }
245 cpumask_set_cpu(i, mask);
44fbc1b6 246 }
2a402aa6 247
44fbc1b6
NC		 248 /* set queue affinity mask */
249 cpumask_copy(queue->affinity_mask, mask);
250 rc = irq_set_affinity_and_hint(queue->irq, queue->affinity_mask);
251 free_cpumask_var(mask);
252
253 return rc;
254}
255
256/* assumes cpu read lock is held */
257static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter)
258{
259 struct ibmvnic_sub_crq_queue **rxqs = adapter->rx_scrq;
260 struct ibmvnic_sub_crq_queue **txqs = adapter->tx_scrq;
261 struct ibmvnic_sub_crq_queue *queue;
68315829
NC		 262 int num_rxqs = adapter->num_active_rx_scrqs, i_rxqs = 0;
263 int num_txqs = adapter->num_active_tx_scrqs, i_txqs = 0;
44fbc1b6 264 int total_queues, stride, stragglers, i;
2a402aa6 265 unsigned int num_cpu, cpu = 0;
68315829 266 bool is_rx_queue;
44fbc1b6
NC		 267 int rc = 0;
268
269 netdev_dbg(adapter->netdev, "%s: Setting irq affinity hints", __func__);
270 if (!(adapter->rx_scrq && adapter->tx_scrq)) {
271 netdev_warn(adapter->netdev,
272 "%s: Set affinity failed, queues not allocated\n",
273 __func__);
274 return;
275 }
276
277 total_queues = num_rxqs + num_txqs;
278 num_cpu = num_online_cpus();
279 /* number of cpu's assigned per irq */
280 stride = max_t(int, num_cpu / total_queues, 1);
281 /* number of leftover cpu's */
282 stragglers = num_cpu >= total_queues ? num_cpu % total_queues : 0;
44fbc1b6 283
68315829
NC		 284 for (i = 0; i < total_queues; i++) {
285 is_rx_queue = false;
286 /* balance core load by alternating rx and tx assignments
287 * ex: TX0 -> RX0 -> TX1 -> RX1 etc.
288 */
289 if ((i % 2 == 1 && i_rxqs < num_rxqs) || i_txqs == num_txqs) {
290 queue = rxqs[i_rxqs++];
291 is_rx_queue = true;
292 } else {
293 queue = txqs[i_txqs++];
294 }
295
44fbc1b6
NC		 296 rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers,
297 stride);
298 if (rc)
299 goto out;
df8f66d0 300
68315829 301 if (!queue || is_rx_queue)
df8f66d0
NC		 302 continue;
303
304 rc = __netif_set_xps_queue(adapter->netdev,
305 cpumask_bits(queue->affinity_mask),
6f2ce45f 306 i_txqs - 1, XPS_CPUS);
df8f66d0
NC		 307 if (rc)
308 netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n",
6f2ce45f 309 __func__, i_txqs - 1, rc);
44fbc1b6
NC		 310 }
311
44fbc1b6
NC		 312out:
313 if (rc) {
314 netdev_warn(adapter->netdev,
315 "%s: Set affinity failed, queue addr = %p, IRQ = %d, rc = %d.\n",
316 __func__, queue, queue->irq, rc);
317 ibmvnic_clean_affinity(adapter);
318 }
319}
320
92125c3a
NC		 321static int ibmvnic_cpu_online(unsigned int cpu, struct hlist_node *node)
322{
323 struct ibmvnic_adapter *adapter;
324
325 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node);
326 ibmvnic_set_affinity(adapter);
327 return 0;
328}
329
330static int ibmvnic_cpu_dead(unsigned int cpu, struct hlist_node *node)
331{
332 struct ibmvnic_adapter *adapter;
333
334 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node_dead);
335 ibmvnic_set_affinity(adapter);
336 return 0;
337}
338
339static int ibmvnic_cpu_down_prep(unsigned int cpu, struct hlist_node *node)
340{
341 struct ibmvnic_adapter *adapter;
342
343 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node);
344 ibmvnic_clean_affinity(adapter);
345 return 0;
346}
347
348static enum cpuhp_state ibmvnic_online;
349
350static int ibmvnic_cpu_notif_add(struct ibmvnic_adapter *adapter)
351{
352 int ret;
353
354 ret = cpuhp_state_add_instance_nocalls(ibmvnic_online, &adapter->node);
355 if (ret)
356 return ret;
357 ret = cpuhp_state_add_instance_nocalls(CPUHP_IBMVNIC_DEAD,
358 &adapter->node_dead);
359 if (!ret)
360 return ret;
361 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node);
362 return ret;
363}
364
365static void ibmvnic_cpu_notif_remove(struct ibmvnic_adapter *adapter)
366{
367 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node);
368 cpuhp_state_remove_instance_nocalls(CPUHP_IBMVNIC_DEAD,
369 &adapter->node_dead);
370}
371
032c5e82
TF		 372static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
373 unsigned long length, unsigned long *number,
374 unsigned long *irq)
375{
376 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
377 long rc;
378
379 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
380 *number = retbuf[0];
381 *irq = retbuf[1];
382
383 return rc;
384}
385
476d96ca
TF		 386/**
387 * ibmvnic_wait_for_completion - Check device state and wait for completion
388 * @adapter: private device data
389 * @comp_done: completion structure to wait for
390 * @timeout: time to wait in milliseconds
391 *
392 * Wait for a completion signal or until the timeout limit is reached
393 * while checking that the device is still active.
394 */
395static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
396 struct completion *comp_done,
397 unsigned long timeout)
398{
399 struct net_device *netdev;
400 unsigned long div_timeout;
401 u8 retry;
402
403 netdev = adapter->netdev;
404 retry = 5;
405 div_timeout = msecs_to_jiffies(timeout / retry);
406 while (true) {
407 if (!adapter->crq.active) {
408 netdev_err(netdev, "Device down!\n");
409 return -ENODEV;
410 }
8f9cc1ee 411 if (!retry--)
476d96ca
TF		 412 break;
413 if (wait_for_completion_timeout(comp_done, div_timeout))
414 return 0;
415 }
416 netdev_err(netdev, "Operation timed out.\n");
417 return -ETIMEDOUT;
418}
419
f8ac0bfa
SB		 420/**
421 * reuse_ltb() - Check if a long term buffer can be reused
422 * @ltb: The long term buffer to be checked
423 * @size: The size of the long term buffer.
424 *
425 * An LTB can be reused unless its size has changed.
426 *
427 * Return: Return true if the LTB can be reused, false otherwise.
428 */
429static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size)
430{
431 return (ltb->buff && ltb->size == size);
432}
433
434/**
435 * alloc_long_term_buff() - Allocate a long term buffer (LTB)
436 *
437 * @adapter: ibmvnic adapter associated to the LTB
438 * @ltb: container object for the LTB
439 * @size: size of the LTB
440 *
441 * Allocate an LTB of the specified size and notify VIOS.
442 *
443 * If the given @ltb already has the correct size, reuse it. Otherwise if
444 * its non-NULL, free it. Then allocate a new one of the correct size.
445 * Notify the VIOS either way since we may now be working with a new VIOS.
446 *
447 * Allocating larger chunks of memory during resets, specially LPM or under
448 * low memory situations can cause resets to fail/timeout and for LPAR to
449 * lose connectivity. So hold onto the LTB even if we fail to communicate
450 * with the VIOS and reuse it on next open. Free LTB when adapter is closed.
451 *
452 * Return: 0 if we were able to allocate the LTB and notify the VIOS and
453 * a negative value otherwise.
454 */
032c5e82
TF		 455static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
456 struct ibmvnic_long_term_buff *ltb, int size)
457{
458 struct device *dev = &adapter->vdev->dev;
93b1ebb3 459 u64 prev = 0;
9c4eaabd 460 int rc;
032c5e82 461
f8ac0bfa
SB		 462 if (!reuse_ltb(ltb, size)) {
463 dev_dbg(dev,
464 "LTB size changed from 0x%llx to 0x%x, reallocating\n",
465 ltb->size, size);
93b1ebb3 466 prev = ltb->size;
f8ac0bfa
SB		 467 free_long_term_buff(adapter, ltb);
468 }
032c5e82 469
f8ac0bfa
SB		 470 if (ltb->buff) {
471 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n",
472 ltb->map_id, ltb->size);
473 } else {
474 ltb->buff = dma_alloc_coherent(dev, size, &ltb->addr,
475 GFP_KERNEL);
476 if (!ltb->buff) {
477 dev_err(dev, "Couldn't alloc long term buffer\n");
478 return -ENOMEM;
479 }
480 ltb->size = size;
481
482 ltb->map_id = find_first_zero_bit(adapter->map_ids,
483 MAX_MAP_ID);
484 bitmap_set(adapter->map_ids, ltb->map_id, 1);
485
486 dev_dbg(dev,
93b1ebb3
SB		 487 "Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n",
488 ltb->map_id, ltb->size, prev);
032c5e82 489 }
f8ac0bfa
SB		 490
491 /* Ensure ltb is zeroed - specially when reusing it. */
492 memset(ltb->buff, 0, ltb->size);
db5d0b59 493
ff25dcb9
TF		 494 mutex_lock(&adapter->fw_lock);
495 adapter->fw_done_rc = 0;
070eca95 496 reinit_completion(&adapter->fw_done);
552a3372
SB		 497
498 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
9c4eaabd 499 if (rc) {
552a3372
SB		 500 dev_err(dev, "send_request_map failed, rc = %d\n", rc);
501 goto out;
9c4eaabd 502 }
476d96ca
TF		 503
504 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
505 if (rc) {
0f2bf318 506 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n",
476d96ca 507 rc);
552a3372 508 goto out;
476d96ca 509 }
f3be0cbc
TF		 510
511 if (adapter->fw_done_rc) {
0f2bf318 512 dev_err(dev, "Couldn't map LTB, rc = %d\n",
f3be0cbc 513 adapter->fw_done_rc);
b6ee566c 514 rc = -EIO;
552a3372
SB		 515 goto out;
516 }
517 rc = 0;
518out:
f8ac0bfa 519 /* don't free LTB on communication error - see function header */
ff25dcb9 520 mutex_unlock(&adapter->fw_lock);
552a3372 521 return rc;
032c5e82
TF		 522}
523
524static void free_long_term_buff(struct ibmvnic_adapter *adapter,
525 struct ibmvnic_long_term_buff *ltb)
526{
527 struct device *dev = &adapter->vdev->dev;
528
c657e32c
NF		 529 if (!ltb->buff)
530 return;
531
7d3a7b9e
LP		 532 /* VIOS automatically unmaps the long term buffer at remote
533 * end for the following resets:
534 * FAILOVER, MOBILITY, TIMEOUT.
535 */
ed651a10 536 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
7d3a7b9e
LP		 537 adapter->reset_reason != VNIC_RESET_MOBILITY &&
538 adapter->reset_reason != VNIC_RESET_TIMEOUT)
dfad09a6 539 send_request_unmap(adapter, ltb->map_id);
0f2bf318 540
59af56c2 541 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
0f2bf318 542
552a3372 543 ltb->buff = NULL;
129854f0
SB		 544 /* mark this map_id free */
545 bitmap_clear(adapter->map_ids, ltb->map_id, 1);
552a3372 546 ltb->map_id = 0;
032c5e82
TF		 547}
548
a75de820
SB		 549/**
550 * free_ltb_set - free the given set of long term buffers (LTBS)
551 * @adapter: The ibmvnic adapter containing this ltb set
552 * @ltb_set: The ltb_set to be freed
553 *
554 * Free the set of LTBs in the given set.
555 */
556
d6b45850
SB		 557static void free_ltb_set(struct ibmvnic_adapter *adapter,
558 struct ibmvnic_ltb_set *ltb_set)
559{
560 int i;
561
562 for (i = 0; i < ltb_set->num_ltbs; i++)
563 free_long_term_buff(adapter, &ltb_set->ltbs[i]);
564
565 kfree(ltb_set->ltbs);
566 ltb_set->ltbs = NULL;
567 ltb_set->num_ltbs = 0;
568}
569
a75de820
SB		 570/**
571 * alloc_ltb_set() - Allocate a set of long term buffers (LTBs)
572 *
573 * @adapter: ibmvnic adapter associated to the LTB
574 * @ltb_set: container object for the set of LTBs
575 * @num_buffs: Number of buffers in the LTB
576 * @buff_size: Size of each buffer in the LTB
577 *
578 * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size
579 * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the
580 * new set of LTBs have fewer LTBs than the old set, free the excess LTBs.
581 * If new set needs more than in old set, allocate the remaining ones.
582 * Try and reuse as many LTBs as possible and avoid reallocation.
583 *
584 * Any changes to this allocation strategy must be reflected in
585 * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb().
586 */
d6b45850
SB		 587static int alloc_ltb_set(struct ibmvnic_adapter *adapter,
588 struct ibmvnic_ltb_set *ltb_set, int num_buffs,
589 int buff_size)
590{
a75de820
SB		 591 struct device *dev = &adapter->vdev->dev;
592 struct ibmvnic_ltb_set old_set;
593 struct ibmvnic_ltb_set new_set;
594 int rem_size;
595 int tot_size; /* size of all ltbs */
596 int ltb_size; /* size of one ltb */
597 int nltbs;
598 int rc;
599 int n;
600 int i;
d6b45850 601
a75de820
SB		 602 dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs,
603 buff_size);
d6b45850 604
a75de820
SB		 605 ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size);
606 tot_size = num_buffs * buff_size;
607
608 if (ltb_size > tot_size)
609 ltb_size = tot_size;
610
611 nltbs = tot_size / ltb_size;
612 if (tot_size % ltb_size)
613 nltbs++;
614
615 old_set = *ltb_set;
616
617 if (old_set.num_ltbs == nltbs) {
618 new_set = old_set;
619 } else {
620 int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff);
621
622 new_set.ltbs = kzalloc(tmp, GFP_KERNEL);
623 if (!new_set.ltbs)
624 return -ENOMEM;
625
626 new_set.num_ltbs = nltbs;
627
628 /* Free any excess ltbs in old set */
629 for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++)
630 free_long_term_buff(adapter, &old_set.ltbs[i]);
631
632 /* Copy remaining ltbs to new set. All LTBs except the
633 * last one are of the same size. alloc_long_term_buff()
634 * will realloc if the size changes.
635 */
636 n = min(old_set.num_ltbs, new_set.num_ltbs);
637 for (i = 0; i < n; i++)
638 new_set.ltbs[i] = old_set.ltbs[i];
d6b45850 639
a75de820
SB		 640 /* Any additional ltbs in new set will have NULL ltbs for
641 * now and will be allocated in alloc_long_term_buff().
642 */
643
644 /* We no longer need the old_set so free it. Note that we
645 * may have reused some ltbs from old set and freed excess
646 * ltbs above. So we only need to free the container now
647 * not the LTBs themselves. (i.e. dont free_ltb_set()!)
648 */
649 kfree(old_set.ltbs);
650 old_set.ltbs = NULL;
651 old_set.num_ltbs = 0;
652
653 /* Install the new set. If allocations fail below, we will
654 * retry later and know what size LTBs we need.
655 */
656 *ltb_set = new_set;
657 }
658
659 i = 0;
660 rem_size = tot_size;
661 while (rem_size) {
662 if (ltb_size > rem_size)
663 ltb_size = rem_size;
664
665 rem_size -= ltb_size;
666
667 rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size);
668 if (rc)
669 goto out;
670 i++;
671 }
d6b45850 672
a75de820 673 WARN_ON(i != new_set.num_ltbs);
d6b45850 674
a75de820
SB		 675 return 0;
676out:
677 /* We may have allocated one/more LTBs before failing and we
678 * want to try and reuse on next reset. So don't free ltb set.
679 */
680 return rc;
d6b45850
SB		 681}
682
2872a67c
SB		 683/**
684 * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB.
685 * @rxpool: The receive buffer pool containing buffer
686 * @bufidx: Index of buffer in rxpool
687 * @ltbp: (Output) pointer to the long term buffer containing the buffer
688 * @offset: (Output) offset of buffer in the LTB from @ltbp
689 *
690 * Map the given buffer identified by [rxpool, bufidx] to an LTB in the
a75de820
SB		 691 * pool and its corresponding offset. Assume for now that each LTB is of
692 * different size but could possibly be optimized based on the allocation
693 * strategy in alloc_ltb_set().
2872a67c
SB		 694 */
695static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool,
696 unsigned int bufidx,
697 struct ibmvnic_long_term_buff **ltbp,
698 unsigned int *offset)
699{
a75de820
SB		 700 struct ibmvnic_long_term_buff *ltb;
701 int nbufs; /* # of buffers in one ltb */
702 int i;
703
704 WARN_ON(bufidx >= rxpool->size);
705
706 for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) {
707 ltb = &rxpool->ltb_set.ltbs[i];
708 nbufs = ltb->size / rxpool->buff_size;
709 if (bufidx < nbufs)
710 break;
711 bufidx -= nbufs;
712 }
713
714 *ltbp = ltb;
2872a67c
SB		 715 *offset = bufidx * rxpool->buff_size;
716}
717
0c91bf9c
SB		 718/**
719 * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB.
720 * @txpool: The transmit buffer pool containing buffer
721 * @bufidx: Index of buffer in txpool
722 * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer
723 * @offset: (Output) offset of buffer in the LTB from @ltbp
724 *
725 * Map the given buffer identified by [txpool, bufidx] to an LTB in the
726 * pool and its corresponding offset.
727 */
728static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool,
729 unsigned int bufidx,
730 struct ibmvnic_long_term_buff **ltbp,
731 unsigned int *offset)
732{
93b1ebb3
SB		 733 struct ibmvnic_long_term_buff *ltb;
734 int nbufs; /* # of buffers in one ltb */
735 int i;
736
737 WARN_ON_ONCE(bufidx >= txpool->num_buffers);
738
739 for (i = 0; i < txpool->ltb_set.num_ltbs; i++) {
740 ltb = &txpool->ltb_set.ltbs[i];
741 nbufs = ltb->size / txpool->buf_size;
742 if (bufidx < nbufs)
743 break;
744 bufidx -= nbufs;
745 }
746
747 *ltbp = ltb;
0c91bf9c
SB		 748 *offset = bufidx * txpool->buf_size;
749}
750
f185a49a
TF		 751static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
752{
753 int i;
754
507ebe64 755 for (i = 0; i < adapter->num_active_rx_pools; i++)
f185a49a
TF		 756 adapter->rx_pool[i].active = 0;
757}
758
032c5e82
TF		 759static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
760 struct ibmvnic_rx_pool *pool)
761{
762 int count = pool->size - atomic_read(&pool->available);
f3ae59c0 763 u64 handle = adapter->rx_scrq[pool->index]->handle;
032c5e82 764 struct device *dev = &adapter->vdev->dev;
4f0b6812
TF		 765 struct ibmvnic_ind_xmit_queue *ind_bufp;
766 struct ibmvnic_sub_crq_queue *rx_scrq;
2872a67c 767 struct ibmvnic_long_term_buff *ltb;
4f0b6812 768 union sub_crq *sub_crq;
032c5e82
TF		 769 int buffers_added = 0;
770 unsigned long lpar_rc;
032c5e82
TF		 771 struct sk_buff *skb;
772 unsigned int offset;
773 dma_addr_t dma_addr;
774 unsigned char *dst;
032c5e82 775 int shift = 0;
8880fc66 776 int bufidx;
032c5e82
TF		 777 int i;
778
f185a49a
TF		 779 if (!pool->active)
780 return;
781
4f0b6812
TF		 782 rx_scrq = adapter->rx_scrq[pool->index];
783 ind_bufp = &rx_scrq->ind_buf;
72368f8b
SB		 784
785 /* netdev_skb_alloc() could have failed after we saved a few skbs
786 * in the indir_buf and we would not have sent them to VIOS yet.
787 * To account for them, start the loop at ind_bufp->index rather
788 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will
789 * be 0.
790 */
791 for (i = ind_bufp->index; i < count; ++i) {
8880fc66 792 bufidx = pool->free_map[pool->next_free];
489de956
SB		 793
794 /* We maybe reusing the skb from earlier resets. Allocate
795 * only if necessary. But since the LTB may have changed
796 * during reset (see init_rx_pools()), update LTB below
797 * even if reusing skb.
798 */
8880fc66 799 skb = pool->rx_buff[bufidx].skb;
032c5e82 800 if (!skb) {
489de956
SB		 801 skb = netdev_alloc_skb(adapter->netdev,
802 pool->buff_size);
803 if (!skb) {
804 dev_err(dev, "Couldn't replenish rx buff\n");
805 adapter->replenish_no_mem++;
806 break;
807 }
032c5e82
TF		 808 }
809
38106b2c
SB		 810 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
811 pool->next_free = (pool->next_free + 1) % pool->size;
032c5e82 812
032c5e82 813 /* Copy the skb to the long term mapped DMA buffer */
2872a67c
SB		 814 map_rxpool_buf_to_ltb(pool, bufidx, &ltb, &offset);
815 dst = ltb->buff + offset;
032c5e82 816 memset(dst, 0, pool->buff_size);
2872a67c 817 dma_addr = ltb->addr + offset;
032c5e82 818
38106b2c 819 /* add the skb to an rx_buff in the pool */
8880fc66
SB		 820 pool->rx_buff[bufidx].data = dst;
821 pool->rx_buff[bufidx].dma = dma_addr;
822 pool->rx_buff[bufidx].skb = skb;
823 pool->rx_buff[bufidx].pool_index = pool->index;
824 pool->rx_buff[bufidx].size = pool->buff_size;
032c5e82 825
38106b2c 826 /* queue the rx_buff for the next send_subcrq_indirect */
4f0b6812
TF		 827 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++];
828 memset(sub_crq, 0, sizeof(*sub_crq));
829 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD;
830 sub_crq->rx_add.correlator =
8880fc66 831 cpu_to_be64((u64)&pool->rx_buff[bufidx]);
4f0b6812 832 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr);
2872a67c 833 sub_crq->rx_add.map_id = ltb->map_id;
032c5e82
TF		 834
835 /* The length field of the sCRQ is defined to be 24 bits so the
836 * buffer size needs to be left shifted by a byte before it is
837 * converted to big endian to prevent the last byte from being
838 * truncated.
839 */
840#ifdef __LITTLE_ENDIAN__
841 shift = 8;
842#endif
4f0b6812 843 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift);
38106b2c
SB		 844
845 /* if send_subcrq_indirect queue is full, flush to VIOS */
4f0b6812
TF		 846 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS ||
847 i == count - 1) {
848 lpar_rc =
849 send_subcrq_indirect(adapter, handle,
850 (u64)ind_bufp->indir_dma,
851 (u64)ind_bufp->index);
852 if (lpar_rc != H_SUCCESS)
853 goto failure;
854 buffers_added += ind_bufp->index;
855 adapter->replenish_add_buff_success += ind_bufp->index;
856 ind_bufp->index = 0;
857 }
032c5e82
TF		 858 }
859 atomic_add(buffers_added, &pool->available);
860 return;
861
862failure:
2d14d379
TF		 863 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
864 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
4f0b6812
TF		 865 for (i = ind_bufp->index - 1; i >= 0; --i) {
866 struct ibmvnic_rx_buff *rx_buff;
867
868 pool->next_free = pool->next_free == 0 ?
869 pool->size - 1 : pool->next_free - 1;
870 sub_crq = &ind_bufp->indir_arr[i];
871 rx_buff = (struct ibmvnic_rx_buff *)
872 be64_to_cpu(sub_crq->rx_add.correlator);
8880fc66
SB		 873 bufidx = (int)(rx_buff - pool->rx_buff);
874 pool->free_map[pool->next_free] = bufidx;
875 dev_kfree_skb_any(pool->rx_buff[bufidx].skb);
876 pool->rx_buff[bufidx].skb = NULL;
4f0b6812 877 }
c2af6225
DB		 878 adapter->replenish_add_buff_failure += ind_bufp->index;
879 atomic_add(buffers_added, &pool->available);
4f0b6812 880 ind_bufp->index = 0;
5a18e1e0 881 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
f185a49a 882 /* Disable buffer pool replenishment and report carrier off if
5a18e1e0
TF		 883 * queue is closed or pending failover.
884 * Firmware guarantees that a signal will be sent to the
885 * driver, triggering a reset.
f185a49a
TF		 886 */
887 deactivate_rx_pools(adapter);
888 netif_carrier_off(adapter->netdev);
889 }
032c5e82
TF		 890}
891
892static void replenish_pools(struct ibmvnic_adapter *adapter)
893{
894 int i;
895
032c5e82 896 adapter->replenish_task_cycles++;
507ebe64 897 for (i = 0; i < adapter->num_active_rx_pools; i++) {
032c5e82
TF		 898 if (adapter->rx_pool[i].active)
899 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
900 }
38bd5cec
SB		 901
902 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i);
032c5e82
TF		 903}
904
3d52b594
JA		 905static void release_stats_buffers(struct ibmvnic_adapter *adapter)
906{
907 kfree(adapter->tx_stats_buffers);
908 kfree(adapter->rx_stats_buffers);
b0992eca
TF		 909 adapter->tx_stats_buffers = NULL;
910 adapter->rx_stats_buffers = NULL;
3d52b594
JA		 911}
912
913static int init_stats_buffers(struct ibmvnic_adapter *adapter)
914{
915 adapter->tx_stats_buffers =
abcae546 916 kcalloc(IBMVNIC_MAX_QUEUES,
3d52b594
JA		 917 sizeof(struct ibmvnic_tx_queue_stats),
918 GFP_KERNEL);
919 if (!adapter->tx_stats_buffers)
920 return -ENOMEM;
921
922 adapter->rx_stats_buffers =
abcae546 923 kcalloc(IBMVNIC_MAX_QUEUES,
3d52b594
JA		 924 sizeof(struct ibmvnic_rx_queue_stats),
925 GFP_KERNEL);
926 if (!adapter->rx_stats_buffers)
927 return -ENOMEM;
928
929 return 0;
930}
931
7bbc27a4
NF		 932static void release_stats_token(struct ibmvnic_adapter *adapter)
933{
934 struct device *dev = &adapter->vdev->dev;
935
936 if (!adapter->stats_token)
937 return;
938
939 dma_unmap_single(dev, adapter->stats_token,
940 sizeof(struct ibmvnic_statistics),
941 DMA_FROM_DEVICE);
942 adapter->stats_token = 0;
943}
944
945static int init_stats_token(struct ibmvnic_adapter *adapter)
946{
947 struct device *dev = &adapter->vdev->dev;
948 dma_addr_t stok;
b6ee566c 949 int rc;
7bbc27a4
NF		 950
951 stok = dma_map_single(dev, &adapter->stats,
952 sizeof(struct ibmvnic_statistics),
953 DMA_FROM_DEVICE);
b6ee566c
DM		 954 rc = dma_mapping_error(dev, stok);
955 if (rc) {
956 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc);
957 return rc;
7bbc27a4
NF		 958 }
959
960 adapter->stats_token = stok;
d1cf33d9 961 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
7bbc27a4
NF		 962 return 0;
963}
964
0f2bf318
SB		 965/**
966 * release_rx_pools() - Release any rx pools attached to @adapter.
967 * @adapter: ibmvnic adapter
968 *
969 * Safe to call this multiple times - even if no pools are attached.
970 */
0ffe2cb7 971static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 972{
0ffe2cb7 973 struct ibmvnic_rx_pool *rx_pool;
0ffe2cb7 974 int i, j;
032c5e82 975
0ffe2cb7 976 if (!adapter->rx_pool)
032c5e82
TF		 977 return;
978
82e3be32 979 for (i = 0; i < adapter->num_active_rx_pools; i++) {
0ffe2cb7
NF		 980 rx_pool = &adapter->rx_pool[i];
981
d1cf33d9
NF		 982 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
983
0ffe2cb7 984 kfree(rx_pool->free_map);
489de956 985
d6b45850 986 free_ltb_set(adapter, &rx_pool->ltb_set);
0ffe2cb7
NF		 987
988 if (!rx_pool->rx_buff)
e0ebe942 989 continue;
0ffe2cb7
NF		 990
991 for (j = 0; j < rx_pool->size; j++) {
992 if (rx_pool->rx_buff[j].skb) {
b7cdec3d
TF		 993 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
994 rx_pool->rx_buff[j].skb = NULL;
0ffe2cb7
NF		 995 }
996 }
997
998 kfree(rx_pool->rx_buff);
999 }
1000
1001 kfree(adapter->rx_pool);
1002 adapter->rx_pool = NULL;
82e3be32 1003 adapter->num_active_rx_pools = 0;
489de956
SB		 1004 adapter->prev_rx_pool_size = 0;
1005}
1006
1007/**
1008 * reuse_rx_pools() - Check if the existing rx pools can be reused.
1009 * @adapter: ibmvnic adapter
1010 *
1011 * Check if the existing rx pools in the adapter can be reused. The
1012 * pools can be reused if the pool parameters (number of pools,
1013 * number of buffers in the pool and size of each buffer) have not
1014 * changed.
1015 *
1016 * NOTE: This assumes that all pools have the same number of buffers
1017 * which is the case currently. If that changes, we must fix this.
1018 *
1019 * Return: true if the rx pools can be reused, false otherwise.
1020 */
1021static bool reuse_rx_pools(struct ibmvnic_adapter *adapter)
1022{
1023 u64 old_num_pools, new_num_pools;
1024 u64 old_pool_size, new_pool_size;
1025 u64 old_buff_size, new_buff_size;
1026
1027 if (!adapter->rx_pool)
1028 return false;
1029
1030 old_num_pools = adapter->num_active_rx_pools;
1031 new_num_pools = adapter->req_rx_queues;
1032
1033 old_pool_size = adapter->prev_rx_pool_size;
1034 new_pool_size = adapter->req_rx_add_entries_per_subcrq;
1035
1036 old_buff_size = adapter->prev_rx_buf_sz;
1037 new_buff_size = adapter->cur_rx_buf_sz;
1038
0584f494
SB		 1039 if (old_buff_size != new_buff_size ||
1040 old_num_pools != new_num_pools ||
1041 old_pool_size != new_pool_size)
489de956
SB		 1042 return false;
1043
1044 return true;
0ffe2cb7
NF		 1045}
1046
489de956
SB		 1047/**
1048 * init_rx_pools(): Initialize the set of receiver pools in the adapter.
1049 * @netdev: net device associated with the vnic interface
1050 *
1051 * Initialize the set of receiver pools in the ibmvnic adapter associated
1052 * with the net_device @netdev. If possible, reuse the existing rx pools.
1053 * Otherwise free any existing pools and allocate a new set of pools
1054 * before initializing them.
1055 *
1056 * Return: 0 on success and negative value on error.
1057 */
0ffe2cb7
NF		 1058static int init_rx_pools(struct net_device *netdev)
1059{
1060 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1061 struct device *dev = &adapter->vdev->dev;
1062 struct ibmvnic_rx_pool *rx_pool;
0df7b9ad
SB		 1063 u64 num_pools;
1064 u64 pool_size; /* # of buffers in one pool */
507ebe64 1065 u64 buff_size;
b6ee566c 1066 int i, j, rc;
0ffe2cb7 1067
0df7b9ad 1068 pool_size = adapter->req_rx_add_entries_per_subcrq;
489de956 1069 num_pools = adapter->req_rx_queues;
507ebe64 1070 buff_size = adapter->cur_rx_buf_sz;
0ffe2cb7 1071
489de956
SB		 1072 if (reuse_rx_pools(adapter)) {
1073 dev_dbg(dev, "Reusing rx pools\n");
1074 goto update_ltb;
1075 }
1076
1077 /* Allocate/populate the pools. */
1078 release_rx_pools(adapter);
1079
0df7b9ad 1080 adapter->rx_pool = kcalloc(num_pools,
0ffe2cb7
NF		 1081 sizeof(struct ibmvnic_rx_pool),
1082 GFP_KERNEL);
1083 if (!adapter->rx_pool) {
1084 dev_err(dev, "Failed to allocate rx pools\n");
b6ee566c 1085 return -ENOMEM;
0ffe2cb7
NF		 1086 }
1087
0f2bf318
SB		 1088 /* Set num_active_rx_pools early. If we fail below after partial
1089 * allocation, release_rx_pools() will know how many to look for.
1090 */
0df7b9ad 1091 adapter->num_active_rx_pools = num_pools;
82e3be32 1092
0df7b9ad 1093 for (i = 0; i < num_pools; i++) {
0ffe2cb7
NF		 1094 rx_pool = &adapter->rx_pool[i];
1095
1096 netdev_dbg(adapter->netdev,
d1cf33d9 1097 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
0df7b9ad 1098 i, pool_size, buff_size);
0ffe2cb7 1099
0df7b9ad 1100 rx_pool->size = pool_size;
0ffe2cb7 1101 rx_pool->index = i;
9a87c3fc 1102 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
0ffe2cb7
NF		 1103
1104 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
1105 GFP_KERNEL);
1106 if (!rx_pool->free_map) {
0f2bf318 1107 dev_err(dev, "Couldn't alloc free_map %d\n", i);
b6ee566c 1108 rc = -ENOMEM;
489de956 1109 goto out_release;
032c5e82 1110 }
0ffe2cb7
NF		 1111
1112 rx_pool->rx_buff = kcalloc(rx_pool->size,
1113 sizeof(struct ibmvnic_rx_buff),
1114 GFP_KERNEL);
1115 if (!rx_pool->rx_buff) {
1116 dev_err(dev, "Couldn't alloc rx buffers\n");
b6ee566c 1117 rc = -ENOMEM;
489de956 1118 goto out_release;
0ffe2cb7 1119 }
489de956
SB		 1120 }
1121
1122 adapter->prev_rx_pool_size = pool_size;
1123 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz;
1124
1125update_ltb:
1126 for (i = 0; i < num_pools; i++) {
1127 rx_pool = &adapter->rx_pool[i];
1128 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n",
1129 i, rx_pool->size, rx_pool->buff_size);
0ffe2cb7 1130
a75de820
SB		 1131 rc = alloc_ltb_set(adapter, &rx_pool->ltb_set,
1132 rx_pool->size, rx_pool->buff_size);
1133 if (rc)
489de956
SB		 1134 goto out;
1135
1136 for (j = 0; j < rx_pool->size; ++j) {
1137 struct ibmvnic_rx_buff *rx_buff;
0ffe2cb7 1138
0ffe2cb7
NF		 1139 rx_pool->free_map[j] = j;
1140
489de956
SB		 1141 /* NOTE: Don't clear rx_buff->skb here - will leak
1142 * memory! replenish_rx_pool() will reuse skbs or
1143 * allocate as necessary.
1144 */
1145 rx_buff = &rx_pool->rx_buff[j];
1146 rx_buff->dma = 0;
1147 rx_buff->data = 0;
1148 rx_buff->size = 0;
1149 rx_buff->pool_index = 0;
1150 }
1151
1152 /* Mark pool "empty" so replenish_rx_pools() will
1153 * update the LTB info for each buffer
1154 */
0ffe2cb7
NF		 1155 atomic_set(&rx_pool->available, 0);
1156 rx_pool->next_alloc = 0;
1157 rx_pool->next_free = 0;
489de956
SB		 1158 /* replenish_rx_pool() may have called deactivate_rx_pools()
1159 * on failover. Ensure pool is active now.
1160 */
1161 rx_pool->active = 1;
032c5e82 1162 }
0ffe2cb7 1163 return 0;
489de956
SB		 1164out_release:
1165 release_rx_pools(adapter);
1166out:
1167 /* We failed to allocate one or more LTBs or map them on the VIOS.
1168 * Hold onto the pools and any LTBs that we did allocate/map.
1169 */
b6ee566c 1170 return rc;
032c5e82
TF		 1171}
1172
4e6759be
DANR		 1173static void release_vpd_data(struct ibmvnic_adapter *adapter)
1174{
1175 if (!adapter->vpd)
1176 return;
1177
1178 kfree(adapter->vpd->buff);
1179 kfree(adapter->vpd);
b0992eca
TF		 1180
1181 adapter->vpd = NULL;
4e6759be
DANR		 1182}
1183
fb79421c
TF		 1184static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
1185 struct ibmvnic_tx_pool *tx_pool)
1186{
1187 kfree(tx_pool->tx_buff);
1188 kfree(tx_pool->free_map);
93b1ebb3 1189 free_ltb_set(adapter, &tx_pool->ltb_set);
fb79421c
TF		 1190}
1191
0f2bf318
SB		 1192/**
1193 * release_tx_pools() - Release any tx pools attached to @adapter.
1194 * @adapter: ibmvnic adapter
1195 *
1196 * Safe to call this multiple times - even if no pools are attached.
1197 */
c657e32c
NF		 1198static void release_tx_pools(struct ibmvnic_adapter *adapter)
1199{
896d8695 1200 int i;
c657e32c 1201
0f2bf318
SB		 1202 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are
1203 * both NULL or both non-NULL. So we only need to check one.
1204 */
c657e32c
NF		 1205 if (!adapter->tx_pool)
1206 return;
1207
82e3be32 1208 for (i = 0; i < adapter->num_active_tx_pools; i++) {
fb79421c
TF		 1209 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
1210 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
c657e32c
NF		 1211 }
1212
1213 kfree(adapter->tx_pool);
1214 adapter->tx_pool = NULL;
fb79421c
TF		 1215 kfree(adapter->tso_pool);
1216 adapter->tso_pool = NULL;
82e3be32 1217 adapter->num_active_tx_pools = 0;
bbd80930 1218 adapter->prev_tx_pool_size = 0;
c657e32c
NF		 1219}
1220
3205306c
TF		 1221static int init_one_tx_pool(struct net_device *netdev,
1222 struct ibmvnic_tx_pool *tx_pool,
8243c7ed 1223 int pool_size, int buf_size)
3205306c 1224{
3205306c
TF		 1225 int i;
1226
8243c7ed 1227 tx_pool->tx_buff = kcalloc(pool_size,
3205306c
TF		 1228 sizeof(struct ibmvnic_tx_buff),
1229 GFP_KERNEL);
1230 if (!tx_pool->tx_buff)
b6ee566c 1231 return -ENOMEM;
3205306c 1232
8243c7ed 1233 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL);
bbd80930
SB		 1234 if (!tx_pool->free_map) {
1235 kfree(tx_pool->tx_buff);
1236 tx_pool->tx_buff = NULL;
b6ee566c 1237 return -ENOMEM;
bbd80930 1238 }
3205306c 1239
8243c7ed 1240 for (i = 0; i < pool_size; i++)
3205306c
TF		 1241 tx_pool->free_map[i] = i;
1242
1243 tx_pool->consumer_index = 0;
1244 tx_pool->producer_index = 0;
8243c7ed 1245 tx_pool->num_buffers = pool_size;
3205306c
TF		 1246 tx_pool->buf_size = buf_size;
1247
1248 return 0;
1249}
1250
bbd80930
SB		 1251/**
1252 * reuse_tx_pools() - Check if the existing tx pools can be reused.
1253 * @adapter: ibmvnic adapter
1254 *
1255 * Check if the existing tx pools in the adapter can be reused. The
1256 * pools can be reused if the pool parameters (number of pools,
1257 * number of buffers in the pool and mtu) have not changed.
1258 *
1259 * NOTE: This assumes that all pools have the same number of buffers
1260 * which is the case currently. If that changes, we must fix this.
1261 *
1262 * Return: true if the tx pools can be reused, false otherwise.
1263 */
1264static bool reuse_tx_pools(struct ibmvnic_adapter *adapter)
1265{
1266 u64 old_num_pools, new_num_pools;
1267 u64 old_pool_size, new_pool_size;
1268 u64 old_mtu, new_mtu;
1269
1270 if (!adapter->tx_pool)
1271 return false;
1272
1273 old_num_pools = adapter->num_active_tx_pools;
1274 new_num_pools = adapter->num_active_tx_scrqs;
1275 old_pool_size = adapter->prev_tx_pool_size;
1276 new_pool_size = adapter->req_tx_entries_per_subcrq;
1277 old_mtu = adapter->prev_mtu;
1278 new_mtu = adapter->req_mtu;
1279
5b085601
SB		 1280 if (old_mtu != new_mtu ||
1281 old_num_pools != new_num_pools ||
1282 old_pool_size != new_pool_size)
bbd80930
SB		 1283 return false;
1284
1285 return true;
1286}
1287
1288/**
1289 * init_tx_pools(): Initialize the set of transmit pools in the adapter.
1290 * @netdev: net device associated with the vnic interface
1291 *
1292 * Initialize the set of transmit pools in the ibmvnic adapter associated
1293 * with the net_device @netdev. If possible, reuse the existing tx pools.
1294 * Otherwise free any existing pools and allocate a new set of pools
1295 * before initializing them.
1296 *
1297 * Return: 0 on success and negative value on error.
1298 */
c657e32c
NF		 1299static int init_tx_pools(struct net_device *netdev)
1300{
1301 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
0f2bf318 1302 struct device *dev = &adapter->vdev->dev;
8243c7ed
SB		 1303 int num_pools;
1304 u64 pool_size; /* # of buffers in pool */
9a87c3fc 1305 u64 buff_size;
bbd80930
SB		 1306 int i, j, rc;
1307
1308 num_pools = adapter->req_tx_queues;
1309
1310 /* We must notify the VIOS about the LTB on all resets - but we only
1311 * need to alloc/populate pools if either the number of buffers or
1312 * size of each buffer in the pool has changed.
1313 */
1314 if (reuse_tx_pools(adapter)) {
1315 netdev_dbg(netdev, "Reusing tx pools\n");
1316 goto update_ltb;
1317 }
1318
1319 /* Allocate/populate the pools. */
1320 release_tx_pools(adapter);
c657e32c 1321
8243c7ed
SB		 1322 pool_size = adapter->req_tx_entries_per_subcrq;
1323 num_pools = adapter->num_active_tx_scrqs;
1324
1325 adapter->tx_pool = kcalloc(num_pools,
c657e32c
NF		 1326 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
1327 if (!adapter->tx_pool)
b6ee566c 1328 return -ENOMEM;
c657e32c 1329
8243c7ed 1330 adapter->tso_pool = kcalloc(num_pools,
3205306c 1331 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
0f2bf318
SB		 1332 /* To simplify release_tx_pools() ensure that ->tx_pool and
1333 * ->tso_pool are either both NULL or both non-NULL.
1334 */
f6ebca8e
SB		 1335 if (!adapter->tso_pool) {
1336 kfree(adapter->tx_pool);
1337 adapter->tx_pool = NULL;
b6ee566c 1338 return -ENOMEM;
f6ebca8e 1339 }
3205306c 1340
0f2bf318
SB		 1341 /* Set num_active_tx_pools early. If we fail below after partial
1342 * allocation, release_tx_pools() will know how many to look for.
1343 */
8243c7ed 1344 adapter->num_active_tx_pools = num_pools;
bbd80930 1345
0d1af4fa
SB		 1346 buff_size = adapter->req_mtu + VLAN_HLEN;
1347 buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
82e3be32 1348
8243c7ed 1349 for (i = 0; i < num_pools; i++) {
0f2bf318
SB		 1350 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n",
1351 i, adapter->req_tx_entries_per_subcrq, buff_size);
1352
3205306c 1353 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
8243c7ed 1354 pool_size, buff_size);
bbd80930
SB		 1355 if (rc)
1356 goto out_release;
fdb06105 1357
7c940b1a
TF		 1358 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
1359 IBMVNIC_TSO_BUFS,
1360 IBMVNIC_TSO_BUF_SZ);
bbd80930
SB		 1361 if (rc)
1362 goto out_release;
1363 }
1364
1365 adapter->prev_tx_pool_size = pool_size;
1366 adapter->prev_mtu = adapter->req_mtu;
1367
1368update_ltb:
1369 /* NOTE: All tx_pools have the same number of buffers (which is
1370 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS
1371 * buffers (see calls init_one_tx_pool() for these).
1372 * For consistency, we use tx_pool->num_buffers and
1373 * tso_pool->num_buffers below.
1374 */
1375 rc = -1;
1376 for (i = 0; i < num_pools; i++) {
1377 struct ibmvnic_tx_pool *tso_pool;
1378 struct ibmvnic_tx_pool *tx_pool;
bbd80930
SB		 1379
1380 tx_pool = &adapter->tx_pool[i];
bbd80930 1381
93b1ebb3
SB		 1382 dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n",
1383 i, tx_pool->num_buffers, tx_pool->buf_size);
1384
1385 rc = alloc_ltb_set(adapter, &tx_pool->ltb_set,
1386 tx_pool->num_buffers, tx_pool->buf_size);
1387 if (rc)
1388 goto out;
bbd80930
SB		 1389
1390 tx_pool->consumer_index = 0;
1391 tx_pool->producer_index = 0;
1392
1393 for (j = 0; j < tx_pool->num_buffers; j++)
1394 tx_pool->free_map[j] = j;
1395
1396 tso_pool = &adapter->tso_pool[i];
bbd80930 1397
93b1ebb3
SB		 1398 dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n",
1399 i, tso_pool->num_buffers, tso_pool->buf_size);
1400
1401 rc = alloc_ltb_set(adapter, &tso_pool->ltb_set,
1402 tso_pool->num_buffers, tso_pool->buf_size);
1403 if (rc)
1404 goto out;
bbd80930
SB		 1405
1406 tso_pool->consumer_index = 0;
1407 tso_pool->producer_index = 0;
1408
1409 for (j = 0; j < tso_pool->num_buffers; j++)
1410 tso_pool->free_map[j] = j;
c657e32c
NF		 1411 }
1412
1413 return 0;
bbd80930
SB		 1414out_release:
1415 release_tx_pools(adapter);
1416out:
1417 /* We failed to allocate one or more LTBs or map them on the VIOS.
1418 * Hold onto the pools and any LTBs that we did allocate/map.
1419 */
1420 return rc;
c657e32c
NF		 1421}
1422
d944c3d6
JA		 1423static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
1424{
1425 int i;
1426
1427 if (adapter->napi_enabled)
1428 return;
1429
1430 for (i = 0; i < adapter->req_rx_queues; i++)
1431 napi_enable(&adapter->napi[i]);
1432
1433 adapter->napi_enabled = true;
1434}
1435
1436static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
1437{
1438 int i;
1439
1440 if (!adapter->napi_enabled)
1441 return;
1442
d1cf33d9
NF		 1443 for (i = 0; i < adapter->req_rx_queues; i++) {
1444 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
d944c3d6 1445 napi_disable(&adapter->napi[i]);
d1cf33d9 1446 }
d944c3d6
JA		 1447
1448 adapter->napi_enabled = false;
1449}
1450
86f669b2
NF		 1451static int init_napi(struct ibmvnic_adapter *adapter)
1452{
1453 int i;
1454
1455 adapter->napi = kcalloc(adapter->req_rx_queues,
1456 sizeof(struct napi_struct), GFP_KERNEL);
1457 if (!adapter->napi)
1458 return -ENOMEM;
1459
1460 for (i = 0; i < adapter->req_rx_queues; i++) {
1461 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
1462 netif_napi_add(adapter->netdev, &adapter->napi[i],
b48b89f9 1463 ibmvnic_poll);
86f669b2
NF		 1464 }
1465
82e3be32 1466 adapter->num_active_rx_napi = adapter->req_rx_queues;
86f669b2
NF		 1467 return 0;
1468}
1469
1470static void release_napi(struct ibmvnic_adapter *adapter)
1471{
1472 int i;
1473
1474 if (!adapter->napi)
1475 return;
1476
82e3be32 1477 for (i = 0; i < adapter->num_active_rx_napi; i++) {
390de194
WY		 1478 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
1479 netif_napi_del(&adapter->napi[i]);
86f669b2
NF		 1480 }
1481
1482 kfree(adapter->napi);
1483 adapter->napi = NULL;
82e3be32 1484 adapter->num_active_rx_napi = 0;
c3f22415 1485 adapter->napi_enabled = false;
86f669b2
NF		 1486}
1487
0666ef7f
LP		 1488static const char *adapter_state_to_string(enum vnic_state state)
1489{
1490 switch (state) {
1491 case VNIC_PROBING:
1492 return "PROBING";
1493 case VNIC_PROBED:
1494 return "PROBED";
1495 case VNIC_OPENING:
1496 return "OPENING";
1497 case VNIC_OPEN:
1498 return "OPEN";
1499 case VNIC_CLOSING:
1500 return "CLOSING";
1501 case VNIC_CLOSED:
1502 return "CLOSED";
1503 case VNIC_REMOVING:
1504 return "REMOVING";
1505 case VNIC_REMOVED:
1506 return "REMOVED";
822ebc2c
LP		 1507 case VNIC_DOWN:
1508 return "DOWN";
0666ef7f 1509 }
07b5dc1d 1510 return "UNKNOWN";
0666ef7f
LP		 1511}
1512
a57a5d25 1513static int ibmvnic_login(struct net_device *netdev)
032c5e82 1514{
6db541ae 1515 unsigned long flags, timeout = msecs_to_jiffies(20000);
032c5e82 1516 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
64d92aa2 1517 int retry_count = 0;
dff515a3 1518 int retries = 10;
eb110410 1519 bool retry;
4d96f12a 1520 int rc;
032c5e82 1521
bd0b6723 1522 do {
eb110410 1523 retry = false;
dff515a3 1524 if (retry_count > retries) {
64d92aa2 1525 netdev_warn(netdev, "Login attempts exceeded\n");
b6ee566c 1526 return -EACCES;
64d92aa2
NF		 1527 }
1528
1529 adapter->init_done_rc = 0;
1530 reinit_completion(&adapter->init_done);
1531 rc = send_login(adapter);
c98d9cc4 1532 if (rc)
64d92aa2 1533 return rc;
64d92aa2
NF		 1534
1535 if (!wait_for_completion_timeout(&adapter->init_done,
1536 timeout)) {
23cc5f66
NC		 1537 netdev_warn(netdev, "Login timed out\n");
1538 adapter->login_pending = false;
1539 goto partial_reset;
64d92aa2
NF		 1540 }
1541
dff515a3
TF		 1542 if (adapter->init_done_rc == ABORTED) {
1543 netdev_warn(netdev, "Login aborted, retrying...\n");
1544 retry = true;
1545 adapter->init_done_rc = 0;
1546 retry_count++;
1547 /* FW or device may be busy, so
1548 * wait a bit before retrying login
1549 */
1550 msleep(500);
1551 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
64d92aa2 1552 retry_count++;
d7c0ef36 1553 release_sub_crqs(adapter, 1);
bd0b6723 1554
eb110410
TF		 1555 retry = true;
1556 netdev_dbg(netdev,
1557 "Received partial success, retrying...\n");
64d92aa2 1558 adapter->init_done_rc = 0;
bd0b6723 1559 reinit_completion(&adapter->init_done);
491099ad 1560 send_query_cap(adapter);
bd0b6723
JA		 1561 if (!wait_for_completion_timeout(&adapter->init_done,
1562 timeout)) {
64d92aa2
NF		 1563 netdev_warn(netdev,
1564 "Capabilities query timed out\n");
b6ee566c 1565 return -ETIMEDOUT;
bd0b6723 1566 }
64d92aa2 1567
4d96f12a
TF		 1568 rc = init_sub_crqs(adapter);
1569 if (rc) {
64d92aa2
NF		 1570 netdev_warn(netdev,
1571 "SCRQ initialization failed\n");
b6ee566c 1572 return rc;
4d96f12a 1573 }
64d92aa2 1574
4d96f12a
TF		 1575 rc = init_sub_crq_irqs(adapter);
1576 if (rc) {
64d92aa2
NF		 1577 netdev_warn(netdev,
1578 "SCRQ irq initialization failed\n");
b6ee566c 1579 return rc;
4d96f12a 1580 }
6db541ae 1581 /* Default/timeout error handling, reset and start fresh */
64d92aa2 1582 } else if (adapter->init_done_rc) {
b6ee566c
DM		 1583 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n",
1584 adapter->init_done_rc);
23cc5f66
NC		 1585
1586partial_reset:
1587 /* adapter login failed, so free any CRQs or sub-CRQs
1588 * and register again before attempting to login again.
1589 * If we don't do this then the VIOS may think that
1590 * we are already logged in and reject any subsequent
1591 * attempts
1592 */
1593 netdev_warn(netdev,
1594 "Freeing and re-registering CRQs before attempting to login again\n");
1595 retry = true;
1596 adapter->init_done_rc = 0;
23cc5f66 1597 release_sub_crqs(adapter, true);
6db541ae
NC		 1598 /* Much of this is similar logic as ibmvnic_probe(),
1599 * we are essentially re-initializing communication
1600 * with the server. We really should not run any
1601 * resets/failovers here because this is already a form
1602 * of reset and we do not want parallel resets occurring
23cc5f66 1603 */
6db541ae
NC		 1604 do {
1605 reinit_init_done(adapter);
1606 /* Clear any failovers we got in the previous
1607 * pass since we are re-initializing the CRQ
1608 */
1609 adapter->failover_pending = false;
1610 release_crq_queue(adapter);
1611 /* If we don't sleep here then we risk an
1612 * unnecessary failover event from the VIOS.
1613 * This is a known VIOS issue caused by a vnic
1614 * device freeing and registering a CRQ too
1615 * quickly.
1616 */
1617 msleep(1500);
1618 /* Avoid any resets, since we are currently
1619 * resetting.
1620 */
1621 spin_lock_irqsave(&adapter->rwi_lock, flags);
1622 flush_reset_queue(adapter);
1623 spin_unlock_irqrestore(&adapter->rwi_lock,
1624 flags);
1625
1626 rc = init_crq_queue(adapter);
1627 if (rc) {
1628 netdev_err(netdev, "login recovery: init CRQ failed %d\n",
1629 rc);
1630 return -EIO;
1631 }
1632
1633 rc = ibmvnic_reset_init(adapter, false);
1634 if (rc)
1635 netdev_err(netdev, "login recovery: Reset init failed %d\n",
1636 rc);
1637 /* IBMVNIC_CRQ_INIT will return EAGAIN if it
1638 * fails, since ibmvnic_reset_init will free
1639 * irq's in failure, we won't be able to receive
1640 * new CRQs so we need to keep trying. probe()
1641 * handles this similarly.
1642 */
1643 } while (rc == -EAGAIN && retry_count++ < retries);
bd0b6723 1644 }
eb110410 1645 } while (retry);
bd0b6723 1646
62740e97 1647 __ibmvnic_set_mac(netdev, adapter->mac_addr);
3d166130 1648
0666ef7f 1649 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state));
a57a5d25
JA		 1650 return 0;
1651}
1652
34f0f4e3
TF		 1653static void release_login_buffer(struct ibmvnic_adapter *adapter)
1654{
d78a671e
NC		 1655 if (!adapter->login_buf)
1656 return;
1657
1658 dma_unmap_single(&adapter->vdev->dev, adapter->login_buf_token,
1659 adapter->login_buf_sz, DMA_TO_DEVICE);
34f0f4e3
TF		 1660 kfree(adapter->login_buf);
1661 adapter->login_buf = NULL;
1662}
1663
1664static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
1665{
d78a671e
NC		 1666 if (!adapter->login_rsp_buf)
1667 return;
1668
1669 dma_unmap_single(&adapter->vdev->dev, adapter->login_rsp_buf_token,
1670 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
34f0f4e3
TF		 1671 kfree(adapter->login_rsp_buf);
1672 adapter->login_rsp_buf = NULL;
1673}
1674
1b8955ee
NF		 1675static void release_resources(struct ibmvnic_adapter *adapter)
1676{
4e6759be
DANR		 1677 release_vpd_data(adapter);
1678
86f669b2 1679 release_napi(adapter);
a0c8be56 1680 release_login_buffer(adapter);
34f0f4e3 1681 release_login_rsp_buffer(adapter);
1b8955ee
NF		 1682}
1683
53da09e9
NF		 1684static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
1685{
1686 struct net_device *netdev = adapter->netdev;
98c41f04 1687 unsigned long timeout = msecs_to_jiffies(20000);
53da09e9
NF		 1688 union ibmvnic_crq crq;
1689 bool resend;
1690 int rc;
1691
d1cf33d9
NF		 1692 netdev_dbg(netdev, "setting link state %d\n", link_state);
1693
53da09e9
NF		 1694 memset(&crq, 0, sizeof(crq));
1695 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
1696 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
1697 crq.logical_link_state.link_state = link_state;
1698
1699 do {
1700 resend = false;
1701
1702 reinit_completion(&adapter->init_done);
1703 rc = ibmvnic_send_crq(adapter, &crq);
1704 if (rc) {
1705 netdev_err(netdev, "Failed to set link state\n");
1706 return rc;
1707 }
1708
1709 if (!wait_for_completion_timeout(&adapter->init_done,
1710 timeout)) {
1711 netdev_err(netdev, "timeout setting link state\n");
b6ee566c 1712 return -ETIMEDOUT;
53da09e9
NF		 1713 }
1714
4c5f6af0 1715 if (adapter->init_done_rc == PARTIALSUCCESS) {
53da09e9
NF		 1716 /* Partuial success, delay and re-send */
1717 mdelay(1000);
1718 resend = true;
ab5ec33b
TF		 1719 } else if (adapter->init_done_rc) {
1720 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
1721 adapter->init_done_rc);
1722 return adapter->init_done_rc;
53da09e9
NF		 1723 }
1724 } while (resend);
1725
1726 return 0;
1727}
1728
7f3c6e6b
TF		 1729static int set_real_num_queues(struct net_device *netdev)
1730{
1731 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1732 int rc;
1733
d1cf33d9
NF		 1734 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
1735 adapter->req_tx_queues, adapter->req_rx_queues);
1736
7f3c6e6b
TF		 1737 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
1738 if (rc) {
1739 netdev_err(netdev, "failed to set the number of tx queues\n");
1740 return rc;
1741 }
1742
1743 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1744 if (rc)
1745 netdev_err(netdev, "failed to set the number of rx queues\n");
1746
1747 return rc;
1748}
1749
4e6759be
DANR		 1750static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1751{
1752 struct device *dev = &adapter->vdev->dev;
1753 union ibmvnic_crq crq;
4e6759be 1754 int len = 0;
9c4eaabd 1755 int rc;
4e6759be
DANR		 1756
1757 if (adapter->vpd->buff)
1758 len = adapter->vpd->len;
1759
ff25dcb9
TF		 1760 mutex_lock(&adapter->fw_lock);
1761 adapter->fw_done_rc = 0;
070eca95 1762 reinit_completion(&adapter->fw_done);
ff25dcb9 1763
4e6759be
DANR		 1764 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1765 crq.get_vpd_size.cmd = GET_VPD_SIZE;
9c4eaabd 1766 rc = ibmvnic_send_crq(adapter, &crq);
ff25dcb9
TF		 1767 if (rc) {
1768 mutex_unlock(&adapter->fw_lock);
9c4eaabd 1769 return rc;
ff25dcb9 1770 }
476d96ca
TF		 1771
1772 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1773 if (rc) {
1774 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
ff25dcb9 1775 mutex_unlock(&adapter->fw_lock);
476d96ca
TF		 1776 return rc;
1777 }
ff25dcb9 1778 mutex_unlock(&adapter->fw_lock);
4e6759be
DANR		 1779
1780 if (!adapter->vpd->len)
1781 return -ENODATA;
1782
1783 if (!adapter->vpd->buff)
1784 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1785 else if (adapter->vpd->len != len)
1786 adapter->vpd->buff =
1787 krealloc(adapter->vpd->buff,
1788 adapter->vpd->len, GFP_KERNEL);
1789
1790 if (!adapter->vpd->buff) {
1791 dev_err(dev, "Could allocate VPD buffer\n");
1792 return -ENOMEM;
1793 }
1794
1795 adapter->vpd->dma_addr =
1796 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1797 DMA_FROM_DEVICE);
f743106e 1798 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
4e6759be
DANR		 1799 dev_err(dev, "Could not map VPD buffer\n");
1800 kfree(adapter->vpd->buff);
b0992eca 1801 adapter->vpd->buff = NULL;
4e6759be
DANR		 1802 return -ENOMEM;
1803 }
1804
ff25dcb9
TF		 1805 mutex_lock(&adapter->fw_lock);
1806 adapter->fw_done_rc = 0;
4e6759be 1807 reinit_completion(&adapter->fw_done);
ff25dcb9 1808
4e6759be
DANR		 1809 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1810 crq.get_vpd.cmd = GET_VPD;
1811 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1812 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
9c4eaabd
TF		 1813 rc = ibmvnic_send_crq(adapter, &crq);
1814 if (rc) {
1815 kfree(adapter->vpd->buff);
1816 adapter->vpd->buff = NULL;
ff25dcb9 1817 mutex_unlock(&adapter->fw_lock);
9c4eaabd
TF		 1818 return rc;
1819 }
476d96ca
TF		 1820
1821 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1822 if (rc) {
1823 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1824 kfree(adapter->vpd->buff);
1825 adapter->vpd->buff = NULL;
ff25dcb9 1826 mutex_unlock(&adapter->fw_lock);
476d96ca
TF		 1827 return rc;
1828 }
4e6759be 1829
ff25dcb9 1830 mutex_unlock(&adapter->fw_lock);
4e6759be
DANR		 1831 return 0;
1832}
1833
bfc32f29 1834static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 1835{
bfc32f29 1836 struct net_device *netdev = adapter->netdev;
86f669b2 1837 int rc;
a57a5d25 1838
7f3c6e6b
TF		 1839 rc = set_real_num_queues(netdev);
1840 if (rc)
1841 return rc;
bd0b6723 1842
4e6759be
DANR		 1843 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1844 if (!adapter->vpd)
1845 return -ENOMEM;
1846
69d08dcb
JA		 1847 /* Vital Product Data (VPD) */
1848 rc = ibmvnic_get_vpd(adapter);
1849 if (rc) {
1850 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1851 return rc;
1852 }
1853
86f669b2
NF		 1854 rc = init_napi(adapter);
1855 if (rc)
1856 return rc;
032c5e82 1857
69980d02 1858 send_query_map(adapter);
0ffe2cb7
NF		 1859
1860 rc = init_rx_pools(netdev);
1861 if (rc)
bfc32f29 1862 return rc;
032c5e82 1863
c657e32c 1864 rc = init_tx_pools(netdev);
bfc32f29
NF		 1865 return rc;
1866}
1867
ed651a10 1868static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 1869{
1870 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 1871 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 1872 int i, rc;
1873
90c8014c 1874 adapter->state = VNIC_OPENING;
032c5e82 1875 replenish_pools(adapter);
d944c3d6 1876 ibmvnic_napi_enable(adapter);
bfc32f29 1877
032c5e82
TF		 1878 /* We're ready to receive frames, enable the sub-crq interrupts and
1879 * set the logical link state to up
1880 */
ed651a10 1881 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 1882 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
ed651a10
NF		 1883 if (prev_state == VNIC_CLOSED)
1884 enable_irq(adapter->rx_scrq[i]->irq);
f23e0643 1885 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
ed651a10 1886 }
032c5e82 1887
ed651a10 1888 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 1889 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
ed651a10
NF		 1890 if (prev_state == VNIC_CLOSED)
1891 enable_irq(adapter->tx_scrq[i]->irq);
f23e0643 1892 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
48538ccb
NC		 1893 /* netdev_tx_reset_queue will reset dql stats. During NON_FATAL
1894 * resets, don't reset the stats because there could be batched
1895 * skb's waiting to be sent. If we reset dql stats, we risk
1896 * num_completed being greater than num_queued. This will cause
1897 * a BUG_ON in dql_completed().
1898 */
1899 if (adapter->reset_reason != VNIC_RESET_NON_FATAL)
1900 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i));
ed651a10 1901 }
032c5e82 1902
53da09e9 1903 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29 1904 if (rc) {
0775ebc4 1905 ibmvnic_napi_disable(adapter);
61772b09 1906 ibmvnic_disable_irqs(adapter);
ed651a10 1907 return rc;
bfc32f29 1908 }
032c5e82 1909
4219196d
SB		 1910 adapter->tx_queues_active = true;
1911
1912 /* Since queues were stopped until now, there shouldn't be any
1913 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we
1914 * don't need the synchronize_rcu()? Leaving it for consistency
1915 * with setting ->tx_queues_active = false.
1916 */
1917 synchronize_rcu();
1918
ed651a10
NF		 1919 netif_tx_start_all_queues(netdev);
1920
2ca220f9
DM		 1921 if (prev_state == VNIC_CLOSED) {
1922 for (i = 0; i < adapter->req_rx_queues; i++)
1923 napi_schedule(&adapter->napi[i]);
1924 }
1925
ed651a10
NF		 1926 adapter->state = VNIC_OPEN;
1927 return rc;
1928}
1929
1930static int ibmvnic_open(struct net_device *netdev)
1931{
1932 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
69d08dcb 1933 int rc;
ed651a10 1934
8f1c0fd2
SB		 1935 ASSERT_RTNL();
1936
1937 /* If device failover is pending or we are about to reset, just set
1938 * device state and return. Device operation will be handled by reset
1939 * routine.
1940 *
1941 * It should be safe to overwrite the adapter->state here. Since
1942 * we hold the rtnl, either the reset has not actually started or
1943 * the rtnl got dropped during the set_link_state() in do_reset().
1944 * In the former case, no one else is changing the state (again we
1945 * have the rtnl) and in the latter case, do_reset() will detect and
1946 * honor our setting below.
5a18e1e0 1947 */
8f1c0fd2 1948 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) {
0666ef7f
LP		 1949 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n",
1950 adapter_state_to_string(adapter->state),
1951 adapter->failover_pending);
5a18e1e0 1952 adapter->state = VNIC_OPEN;
8f1c0fd2
SB		 1953 rc = 0;
1954 goto out;
5a18e1e0
TF		 1955 }
1956
ed651a10
NF		 1957 if (adapter->state != VNIC_CLOSED) {
1958 rc = ibmvnic_login(netdev);
a5681e20 1959 if (rc)
1d850493 1960 goto out;
ed651a10
NF		 1961
1962 rc = init_resources(adapter);
1963 if (rc) {
1964 netdev_err(netdev, "failed to initialize resources\n");
1d850493 1965 goto out;
ed651a10
NF		 1966 }
1967 }
1968
1969 rc = __ibmvnic_open(netdev);
4e6759be 1970
1d850493 1971out:
8f1c0fd2
SB		 1972 /* If open failed and there is a pending failover or in-progress reset,
1973 * set device state and return. Device operation will be handled by
1974 * reset routine. See also comments above regarding rtnl.
1d850493 1975 */
8f1c0fd2
SB		 1976 if (rc &&
1977 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) {
1d850493
SB		 1978 adapter->state = VNIC_OPEN;
1979 rc = 0;
1980 }
61772b09
SB		 1981
1982 if (rc) {
1983 release_resources(adapter);
1984 release_rx_pools(adapter);
1985 release_tx_pools(adapter);
1986 }
1987
bfc32f29 1988 return rc;
032c5e82
TF		 1989}
1990
d0869c00
TF		 1991static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1992{
1993 struct ibmvnic_rx_pool *rx_pool;
637f81d1 1994 struct ibmvnic_rx_buff *rx_buff;
d0869c00
TF		 1995 u64 rx_entries;
1996 int rx_scrqs;
1997 int i, j;
1998
1999 if (!adapter->rx_pool)
2000 return;
2001
660e309d 2002 rx_scrqs = adapter->num_active_rx_pools;
d0869c00
TF		 2003 rx_entries = adapter->req_rx_add_entries_per_subcrq;
2004
2005 /* Free any remaining skbs in the rx buffer pools */
2006 for (i = 0; i < rx_scrqs; i++) {
2007 rx_pool = &adapter->rx_pool[i];
637f81d1 2008 if (!rx_pool || !rx_pool->rx_buff)
d0869c00
TF		 2009 continue;
2010
2011 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
2012 for (j = 0; j < rx_entries; j++) {
637f81d1
TF		 2013 rx_buff = &rx_pool->rx_buff[j];
2014 if (rx_buff && rx_buff->skb) {
2015 dev_kfree_skb_any(rx_buff->skb);
2016 rx_buff->skb = NULL;
d0869c00
TF		 2017 }
2018 }
2019 }
2020}
2021
e9e1e978
TF		 2022static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
2023 struct ibmvnic_tx_pool *tx_pool)
b41b83e9 2024{
637f81d1 2025 struct ibmvnic_tx_buff *tx_buff;
b41b83e9 2026 u64 tx_entries;
e9e1e978
TF		 2027 int i;
2028
050e85c9 2029 if (!tx_pool || !tx_pool->tx_buff)
e9e1e978
TF		 2030 return;
2031
2032 tx_entries = tx_pool->num_buffers;
2033
2034 for (i = 0; i < tx_entries; i++) {
2035 tx_buff = &tx_pool->tx_buff[i];
2036 if (tx_buff && tx_buff->skb) {
2037 dev_kfree_skb_any(tx_buff->skb);
2038 tx_buff->skb = NULL;
2039 }
2040 }
2041}
2042
2043static void clean_tx_pools(struct ibmvnic_adapter *adapter)
2044{
b41b83e9 2045 int tx_scrqs;
e9e1e978 2046 int i;
b41b83e9 2047
e9e1e978 2048 if (!adapter->tx_pool || !adapter->tso_pool)
b41b83e9
NF		 2049 return;
2050
660e309d 2051 tx_scrqs = adapter->num_active_tx_pools;
b41b83e9
NF		 2052
2053 /* Free any remaining skbs in the tx buffer pools */
2054 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9 2055 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
e9e1e978
TF		 2056 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
2057 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
b41b83e9
NF		 2058 }
2059}
2060
6095e590 2061static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
ea5509f5 2062{
6095e590 2063 struct net_device *netdev = adapter->netdev;
ea5509f5
JA		 2064 int i;
2065
46293b94
NF		 2066 if (adapter->tx_scrq) {
2067 for (i = 0; i < adapter->req_tx_queues; i++)
d1cf33d9 2068 if (adapter->tx_scrq[i]->irq) {
f873866a 2069 netdev_dbg(netdev,
d1cf33d9 2070 "Disabling tx_scrq[%d] irq\n", i);
f23e0643 2071 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
46293b94 2072 disable_irq(adapter->tx_scrq[i]->irq);
d1cf33d9 2073 }
46293b94
NF		 2074 }
2075
46293b94
NF		 2076 if (adapter->rx_scrq) {
2077 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 2078 if (adapter->rx_scrq[i]->irq) {
f873866a 2079 netdev_dbg(netdev,
d1cf33d9 2080 "Disabling rx_scrq[%d] irq\n", i);
f23e0643 2081 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
46293b94 2082 disable_irq(adapter->rx_scrq[i]->irq);
d1cf33d9 2083 }
46293b94
NF		 2084 }
2085 }
6095e590
JA		 2086}
2087
2088static void ibmvnic_cleanup(struct net_device *netdev)
2089{
2090 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2091
2092 /* ensure that transmissions are stopped if called by do_reset */
4219196d
SB		 2093
2094 adapter->tx_queues_active = false;
2095
2096 /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active
2097 * update so they don't restart a queue after we stop it below.
2098 */
2099 synchronize_rcu();
2100
7ed5b31f 2101 if (test_bit(0, &adapter->resetting))
6095e590
JA		 2102 netif_tx_disable(netdev);
2103 else
2104 netif_tx_stop_all_queues(netdev);
2105
2106 ibmvnic_napi_disable(adapter);
2107 ibmvnic_disable_irqs(adapter);
01d9bd79
TF		 2108}
2109
2110static int __ibmvnic_close(struct net_device *netdev)
2111{
2112 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2113 int rc = 0;
2114
2115 adapter->state = VNIC_CLOSING;
2116 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
90c8014c 2117 adapter->state = VNIC_CLOSED;
d4083d3c 2118 return rc;
032c5e82
TF		 2119}
2120
ed651a10
NF		 2121static int ibmvnic_close(struct net_device *netdev)
2122{
2123 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2124 int rc;
2125
0666ef7f
LP		 2126 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n",
2127 adapter_state_to_string(adapter->state),
2128 adapter->failover_pending,
38bd5cec
SB		 2129 adapter->force_reset_recovery);
2130
5a18e1e0
TF		 2131 /* If device failover is pending, just set device state and return.
2132 * Device operation will be handled by reset routine.
2133 */
2134 if (adapter->failover_pending) {
2135 adapter->state = VNIC_CLOSED;
2136 return 0;
2137 }
2138
ed651a10 2139 rc = __ibmvnic_close(netdev);
30f79625 2140 ibmvnic_cleanup(netdev);
489de956 2141 clean_rx_pools(adapter);
bbd80930 2142 clean_tx_pools(adapter);
ed651a10
NF		 2143
2144 return rc;
2145}
2146
ad7775dc 2147/**
d95f749a 2148 * get_hdr_lens - fills list of L2/L3/L4 hdr lens
80708602
LJ		 2149 * @hdr_field: bitfield determining needed headers
2150 * @skb: socket buffer
d95f749a 2151 * @hdr_len: array of header lengths to be filled
ad7775dc
TF		 2152 *
2153 * Reads hdr_field to determine which headers are needed by firmware.
2154 * Builds a buffer containing these headers. Saves individual header
2155 * lengths and total buffer length to be used to build descriptors.
d95f749a
NC		 2156 *
2157 * Return: total len of all headers
ad7775dc 2158 */
d95f749a
NC		 2159static int get_hdr_lens(u8 hdr_field, struct sk_buff *skb,
2160 int *hdr_len)
ad7775dc
TF		 2161{
2162 int len = 0;
ad7775dc 2163
ad7775dc 2164
ad7775dc 2165 if ((hdr_field >> 6) & 1) {
b41b45ec 2166 hdr_len[0] = skb_mac_header_len(skb);
ad7775dc
TF		 2167 len += hdr_len[0];
2168 }
2169
2170 if ((hdr_field >> 5) & 1) {
b41b45ec 2171 hdr_len[1] = skb_network_header_len(skb);
ad7775dc
TF		 2172 len += hdr_len[1];
2173 }
2174
d95f749a
NC		 2175 if (!((hdr_field >> 4) & 1))
2176 return len;
2177
2178 if (skb->protocol == htons(ETH_P_IP)) {
2179 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2180 hdr_len[2] = tcp_hdrlen(skb);
2181 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
2182 hdr_len[2] = sizeof(struct udphdr);
2183 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2184 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2185 hdr_len[2] = tcp_hdrlen(skb);
2186 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
2187 hdr_len[2] = sizeof(struct udphdr);
ad7775dc 2188 }
b41b45ec 2189
d95f749a 2190 return len + hdr_len[2];
ad7775dc
TF		 2191}
2192
2193/**
2194 * create_hdr_descs - create header and header extension descriptors
80708602
LJ		 2195 * @hdr_field: bitfield determining needed headers
2196 * @hdr_data: buffer containing header data
2197 * @len: length of data buffer
2198 * @hdr_len: array of individual header lengths
2199 * @scrq_arr: descriptor array
ad7775dc
TF		 2200 *
2201 * Creates header and, if needed, header extension descriptors and
2202 * places them in a descriptor array, scrq_arr
d95f749a
NC		 2203 *
2204 * Return: Number of header descs
ad7775dc
TF		 2205 */
2206
2de09681
TF		 2207static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
2208 union sub_crq *scrq_arr)
ad7775dc 2209{
d95f749a 2210 union sub_crq *hdr_desc;
ad7775dc 2211 int tmp_len = len;
2de09681 2212 int num_descs = 0;
ad7775dc
TF		 2213 u8 *data, *cur;
2214 int tmp;
2215
2216 while (tmp_len > 0) {
2217 cur = hdr_data + len - tmp_len;
2218
d95f749a
NC		 2219 hdr_desc = &scrq_arr[num_descs];
2220 if (num_descs) {
2221 data = hdr_desc->hdr_ext.data;
ad7775dc 2222 tmp = tmp_len > 29 ? 29 : tmp_len;
d95f749a
NC		 2223 hdr_desc->hdr_ext.first = IBMVNIC_CRQ_CMD;
2224 hdr_desc->hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
2225 hdr_desc->hdr_ext.len = tmp;
ad7775dc 2226 } else {
d95f749a 2227 data = hdr_desc->hdr.data;
ad7775dc 2228 tmp = tmp_len > 24 ? 24 : tmp_len;
d95f749a
NC		 2229 hdr_desc->hdr.first = IBMVNIC_CRQ_CMD;
2230 hdr_desc->hdr.type = IBMVNIC_HDR_DESC;
2231 hdr_desc->hdr.len = tmp;
2232 hdr_desc->hdr.l2_len = (u8)hdr_len[0];
2233 hdr_desc->hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
2234 hdr_desc->hdr.l4_len = (u8)hdr_len[2];
2235 hdr_desc->hdr.flag = hdr_field << 1;
ad7775dc
TF		 2236 }
2237 memcpy(data, cur, tmp);
2238 tmp_len -= tmp;
2de09681 2239 num_descs++;
ad7775dc 2240 }
2de09681
TF		 2241
2242 return num_descs;
ad7775dc
TF		 2243}
2244
2245/**
2246 * build_hdr_descs_arr - build a header descriptor array
73214a69
LP		 2247 * @skb: tx socket buffer
2248 * @indir_arr: indirect array
80708602
LJ		 2249 * @num_entries: number of descriptors to be sent
2250 * @hdr_field: bit field determining which headers will be sent
ad7775dc
TF		 2251 *
2252 * This function will build a TX descriptor array with applicable
2253 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
2254 */
2255
c62aa373
TF		 2256static void build_hdr_descs_arr(struct sk_buff *skb,
2257 union sub_crq *indir_arr,
ad7775dc
TF		 2258 int *num_entries, u8 hdr_field)
2259{
2260 int hdr_len[3] = {0, 0, 0};
2de09681 2261 int tot_len;
ad7775dc 2262
d95f749a
NC		 2263 tot_len = get_hdr_lens(hdr_field, skb, hdr_len);
2264 *num_entries += create_hdr_descs(hdr_field, skb_mac_header(skb),
2265 tot_len, hdr_len, indir_arr + 1);
ad7775dc
TF		 2266}
2267
1f247a6f
TF		 2268static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
2269 struct net_device *netdev)
2270{
2271 /* For some backing devices, mishandling of small packets
2272 * can result in a loss of connection or TX stall. Device
2273 * architects recommend that no packet should be smaller
2274 * than the minimum MTU value provided to the driver, so
2275 * pad any packets to that length
2276 */
2277 if (skb->len < netdev->min_mtu)
2278 return skb_put_padto(skb, netdev->min_mtu);
7083a45a
TF		 2279
2280 return 0;
1f247a6f
TF		 2281}
2282
0d973388
TF		 2283static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
2284 struct ibmvnic_sub_crq_queue *tx_scrq)
2285{
2286 struct ibmvnic_ind_xmit_queue *ind_bufp;
2287 struct ibmvnic_tx_buff *tx_buff;
2288 struct ibmvnic_tx_pool *tx_pool;
2289 union sub_crq tx_scrq_entry;
2290 int queue_num;
2291 int entries;
2292 int index;
2293 int i;
2294
2295 ind_bufp = &tx_scrq->ind_buf;
2296 entries = (u64)ind_bufp->index;
2297 queue_num = tx_scrq->pool_index;
2298
2299 for (i = entries - 1; i >= 0; --i) {
2300 tx_scrq_entry = ind_bufp->indir_arr[i];
2301 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC)
2302 continue;
2303 index = be32_to_cpu(tx_scrq_entry.v1.correlator);
2304 if (index & IBMVNIC_TSO_POOL_MASK) {
2305 tx_pool = &adapter->tso_pool[queue_num];
2306 index &= ~IBMVNIC_TSO_POOL_MASK;
2307 } else {
2308 tx_pool = &adapter->tx_pool[queue_num];
2309 }
2310 tx_pool->free_map[tx_pool->consumer_index] = index;
2311 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
2312 tx_pool->num_buffers - 1 :
2313 tx_pool->consumer_index - 1;
2314 tx_buff = &tx_pool->tx_buff[index];
2315 adapter->netdev->stats.tx_packets--;
2316 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len;
2ee73c54 2317 adapter->tx_stats_buffers[queue_num].batched_packets--;
0d973388
TF		 2318 adapter->tx_stats_buffers[queue_num].bytes -=
2319 tx_buff->skb->len;
2320 dev_kfree_skb_any(tx_buff->skb);
2321 tx_buff->skb = NULL;
2322 adapter->netdev->stats.tx_dropped++;
2323 }
4219196d 2324
0d973388 2325 ind_bufp->index = 0;
4219196d 2326
0d973388
TF		 2327 if (atomic_sub_return(entries, &tx_scrq->used) <=
2328 (adapter->req_tx_entries_per_subcrq / 2) &&
4219196d
SB		 2329 __netif_subqueue_stopped(adapter->netdev, queue_num)) {
2330 rcu_read_lock();
2331
2332 if (adapter->tx_queues_active) {
2333 netif_wake_subqueue(adapter->netdev, queue_num);
2334 netdev_dbg(adapter->netdev, "Started queue %d\n",
2335 queue_num);
2336 }
2337
2338 rcu_read_unlock();
0d973388
TF		 2339 }
2340}
2341
74839f7a
NC		 2342static int send_subcrq_direct(struct ibmvnic_adapter *adapter,
2343 u64 remote_handle, u64 *entry)
2344{
2345 unsigned int ua = adapter->vdev->unit_address;
2346 struct device *dev = &adapter->vdev->dev;
2347 int rc;
2348
2349 /* Make sure the hypervisor sees the complete request */
2350 dma_wmb();
2351 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2352 cpu_to_be64(remote_handle),
2353 cpu_to_be64(entry[0]), cpu_to_be64(entry[1]),
2354 cpu_to_be64(entry[2]), cpu_to_be64(entry[3]));
2355
2356 if (rc)
2357 print_subcrq_error(dev, rc, __func__);
2358
2359 return rc;
2360}
2361
0d973388 2362static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter,
74839f7a
NC		 2363 struct ibmvnic_sub_crq_queue *tx_scrq,
2364 bool indirect)
0d973388
TF		 2365{
2366 struct ibmvnic_ind_xmit_queue *ind_bufp;
2367 u64 dma_addr;
2368 u64 entries;
2369 u64 handle;
2370 int rc;
2371
2372 ind_bufp = &tx_scrq->ind_buf;
2373 dma_addr = (u64)ind_bufp->indir_dma;
2374 entries = (u64)ind_bufp->index;
2375 handle = tx_scrq->handle;
2376
2377 if (!entries)
2378 return 0;
74839f7a
NC		 2379
2380 if (indirect)
2381 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries);
2382 else
2383 rc = send_subcrq_direct(adapter, handle,
2384 (u64 *)ind_bufp->indir_arr);
2385
0d973388
TF		 2386 if (rc)
2387 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq);
2388 else
2389 ind_bufp->index = 0;
5cb431dc 2390 return rc;
0d973388
TF		 2391}
2392
94b2bb28 2393static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
032c5e82
TF		 2394{
2395 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2396 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 2397 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82 2398 struct device *dev = &adapter->vdev->dev;
0d973388 2399 struct ibmvnic_ind_xmit_queue *ind_bufp;
032c5e82 2400 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 2401 struct ibmvnic_sub_crq_queue *tx_scrq;
0c91bf9c 2402 struct ibmvnic_long_term_buff *ltb;
032c5e82
TF		 2403 struct ibmvnic_tx_pool *tx_pool;
2404 unsigned int tx_send_failed = 0;
0d973388 2405 netdev_tx_t ret = NETDEV_TX_OK;
032c5e82 2406 unsigned int tx_map_failed = 0;
c62aa373 2407 union sub_crq indir_arr[16];
032c5e82 2408 unsigned int tx_dropped = 0;
2ee73c54
NC		 2409 unsigned int tx_dpackets = 0;
2410 unsigned int tx_bpackets = 0;
032c5e82
TF		 2411 unsigned int tx_bytes = 0;
2412 dma_addr_t data_dma_addr;
2413 struct netdev_queue *txq;
032c5e82 2414 unsigned long lpar_rc;
bdf5d13a 2415 unsigned int skblen;
032c5e82
TF		 2416 union sub_crq tx_crq;
2417 unsigned int offset;
e633e32b 2418 bool use_scrq_send_direct = false;
ad7775dc 2419 int num_entries = 1;
032c5e82 2420 unsigned char *dst;
8880fc66 2421 int bufidx = 0;
a0dca10f 2422 u8 proto = 0;
0d973388 2423
4219196d
SB		 2424 /* If a reset is in progress, drop the packet since
2425 * the scrqs may get torn down. Otherwise use the
2426 * rcu to ensure reset waits for us to complete.
2427 */
2428 rcu_read_lock();
2429 if (!adapter->tx_queues_active) {
7f5b0308
TF		 2430 dev_kfree_skb_any(skb);
2431
032c5e82
TF		 2432 tx_send_failed++;
2433 tx_dropped++;
7f5b0308 2434 ret = NETDEV_TX_OK;
032c5e82
TF		 2435 goto out;
2436 }
2437
4219196d
SB		 2438 tx_scrq = adapter->tx_scrq[queue_num];
2439 txq = netdev_get_tx_queue(netdev, queue_num);
2440 ind_bufp = &tx_scrq->ind_buf;
2441
7083a45a 2442 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1f247a6f
TF		 2443 tx_dropped++;
2444 tx_send_failed++;
2445 ret = NETDEV_TX_OK;
74839f7a 2446 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true);
5cb431dc
NC		 2447 if (lpar_rc != H_SUCCESS)
2448 goto tx_err;
1f247a6f
TF		 2449 goto out;
2450 }
4219196d 2451
06b3e357
TF		 2452 if (skb_is_gso(skb))
2453 tx_pool = &adapter->tso_pool[queue_num];
2454 else
2455 tx_pool = &adapter->tx_pool[queue_num];
1f247a6f 2456
8880fc66 2457 bufidx = tx_pool->free_map[tx_pool->consumer_index];
fdb06105 2458
8880fc66 2459 if (bufidx == IBMVNIC_INVALID_MAP) {
86b61a5f
TF		 2460 dev_kfree_skb_any(skb);
2461 tx_send_failed++;
2462 tx_dropped++;
2463 ret = NETDEV_TX_OK;
74839f7a 2464 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true);
5cb431dc
NC		 2465 if (lpar_rc != H_SUCCESS)
2466 goto tx_err;
86b61a5f
TF		 2467 goto out;
2468 }
2469
2470 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
2471
0c91bf9c
SB		 2472 map_txpool_buf_to_ltb(tx_pool, bufidx, &ltb, &offset);
2473
2474 dst = ltb->buff + offset;
06b3e357 2475 memset(dst, 0, tx_pool->buf_size);
0c91bf9c 2476 data_dma_addr = ltb->addr + offset;
032c5e82 2477
e633e32b
NC		 2478 /* if we are going to send_subcrq_direct this then we need to
2479 * update the checksum before copying the data into ltb. Essentially
2480 * these packets force disable CSO so that we can guarantee that
de390657
NC		 2481 * FW does not need header info and we can send direct. Also, vnic
2482 * server must be able to xmit standard packets without header data
e633e32b 2483 */
de390657
NC		 2484 if (*hdrs == 0 && !skb_is_gso(skb) &&
2485 !ind_bufp->index && !netdev_xmit_more()) {
e633e32b
NC		 2486 use_scrq_send_direct = true;
2487 if (skb->ip_summed == CHECKSUM_PARTIAL &&
2488 skb_checksum_help(skb))
2489 use_scrq_send_direct = false;
2490 }
2491
15482056
TF		 2492 if (skb_shinfo(skb)->nr_frags) {
2493 int cur, i;
2494
2495 /* Copy the head */
2496 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
2497 cur = skb_headlen(skb);
2498
2499 /* Copy the frags */
2500 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2501 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2502
c3105f84
CJ		 2503 memcpy(dst + cur, skb_frag_address(frag),
2504 skb_frag_size(frag));
15482056
TF		 2505 cur += skb_frag_size(frag);
2506 }
2507 } else {
2508 skb_copy_from_linear_data(skb, dst, skb->len);
2509 }
2510
032c5e82 2511 tx_pool->consumer_index =
06b3e357 2512 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
032c5e82 2513
8880fc66 2514 tx_buff = &tx_pool->tx_buff[bufidx];
0983d288
NC		 2515
2516 /* Sanity checks on our free map to make sure it points to an index
2517 * that is not being occupied by another skb. If skb memory is
2518 * not freed then we see congestion control kick in and halt tx.
2519 */
2520 if (unlikely(tx_buff->skb)) {
2521 dev_warn_ratelimited(dev, "TX free map points to untracked skb (%s %d idx=%d)\n",
2522 skb_is_gso(skb) ? "tso_pool" : "tx_pool",
2523 queue_num, bufidx);
2524 dev_kfree_skb_any(tx_buff->skb);
2525 }
2526
032c5e82 2527 tx_buff->skb = skb;
8880fc66 2528 tx_buff->index = bufidx;
032c5e82 2529 tx_buff->pool_index = queue_num;
bdf5d13a 2530 skblen = skb->len;
032c5e82
TF		 2531
2532 memset(&tx_crq, 0, sizeof(tx_crq));
2533 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
2534 tx_crq.v1.type = IBMVNIC_TX_DESC;
2535 tx_crq.v1.n_crq_elem = 1;
2536 tx_crq.v1.n_sge = 1;
2537 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
06b3e357 2538
fdb06105 2539 if (skb_is_gso(skb))
06b3e357 2540 tx_crq.v1.correlator =
8880fc66 2541 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK);
fdb06105 2542 else
8880fc66 2543 tx_crq.v1.correlator = cpu_to_be32(bufidx);
0c91bf9c 2544 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id);
032c5e82
TF		 2545 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
2546 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
2547
e84b4794 2548 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
032c5e82
TF		 2549 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
2550 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
2551 }
2552
2553 if (skb->protocol == htons(ETH_P_IP)) {
a0dca10f
TF		 2554 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
2555 proto = ip_hdr(skb)->protocol;
2556 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2557 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
2558 proto = ipv6_hdr(skb)->nexthdr;
032c5e82
TF		 2559 }
2560
a0dca10f
TF		 2561 if (proto == IPPROTO_TCP)
2562 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
2563 else if (proto == IPPROTO_UDP)
2564 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
2565
ad7775dc 2566 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 2567 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 2568 hdrs += 2;
2569 }
fdb06105
TF		 2570 if (skb_is_gso(skb)) {
2571 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
2572 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
2573 hdrs += 2;
e633e32b
NC		 2574 } else if (use_scrq_send_direct) {
2575 /* See above comment, CSO disabled with direct xmit */
2576 tx_crq.v1.flags1 &= ~(IBMVNIC_TX_CHKSUM_OFFLOAD);
74839f7a
NC		 2577 ind_bufp->index = 1;
2578 tx_buff->num_entries = 1;
2579 netdev_tx_sent_queue(txq, skb->len);
e633e32b 2580 ind_bufp->indir_arr[0] = tx_crq;
74839f7a
NC		 2581 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, false);
2582 if (lpar_rc != H_SUCCESS)
2583 goto tx_err;
2584
2ee73c54 2585 tx_dpackets++;
74839f7a 2586 goto early_exit;
fdb06105 2587 }
0d973388
TF		 2588
2589 if ((*hdrs >> 7) & 1)
c62aa373 2590 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs);
7f5b0308 2591
0d973388
TF		 2592 tx_crq.v1.n_crq_elem = num_entries;
2593 tx_buff->num_entries = num_entries;
2594 /* flush buffer if current entry can not fit */
2595 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) {
74839f7a 2596 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true);
0d973388
TF		 2597 if (lpar_rc != H_SUCCESS)
2598 goto tx_flush_err;
2599 }
7f5b0308 2600
c62aa373
TF		 2601 indir_arr[0] = tx_crq;
2602 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0],
0d973388 2603 num_entries * sizeof(struct ibmvnic_generic_scrq));
74839f7a 2604
0d973388
TF		 2605 ind_bufp->index += num_entries;
2606 if (__netdev_tx_sent_queue(txq, skb->len,
2607 netdev_xmit_more() &&
2608 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) {
74839f7a 2609 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true);
0d973388
TF		 2610 if (lpar_rc != H_SUCCESS)
2611 goto tx_err;
032c5e82 2612 }
142c0ac4 2613
2ee73c54
NC		 2614 tx_bpackets++;
2615
74839f7a 2616early_exit:
ffc385b9 2617 if (atomic_add_return(num_entries, &tx_scrq->used)
58c8c0c0 2618 >= adapter->req_tx_entries_per_subcrq) {
0aecb13c 2619 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
142c0ac4
TF		 2620 netif_stop_subqueue(netdev, queue_num);
2621 }
2622
bdf5d13a 2623 tx_bytes += skblen;
5337824f 2624 txq_trans_cond_update(txq);
032c5e82 2625 ret = NETDEV_TX_OK;
86b61a5f 2626 goto out;
032c5e82 2627
0d973388
TF		 2628tx_flush_err:
2629 dev_kfree_skb_any(skb);
2630 tx_buff->skb = NULL;
2631 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
2632 tx_pool->num_buffers - 1 :
2633 tx_pool->consumer_index - 1;
2634 tx_dropped++;
2635tx_err:
2636 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
2637 dev_err_ratelimited(dev, "tx: send failed\n");
2638
2639 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
2640 /* Disable TX and report carrier off if queue is closed
2641 * or pending failover.
2642 * Firmware guarantees that a signal will be sent to the
2643 * driver, triggering a reset or some other action.
2644 */
2645 netif_tx_stop_all_queues(netdev);
2646 netif_carrier_off(netdev);
2647 }
032c5e82 2648out:
4219196d 2649 rcu_read_unlock();
032c5e82
TF		 2650 netdev->stats.tx_dropped += tx_dropped;
2651 netdev->stats.tx_bytes += tx_bytes;
2ee73c54 2652 netdev->stats.tx_packets += tx_bpackets + tx_dpackets;
032c5e82
TF		 2653 adapter->tx_send_failed += tx_send_failed;
2654 adapter->tx_map_failed += tx_map_failed;
2ee73c54
NC		 2655 adapter->tx_stats_buffers[queue_num].batched_packets += tx_bpackets;
2656 adapter->tx_stats_buffers[queue_num].direct_packets += tx_dpackets;
3d52b594
JA		 2657 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
2658 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
032c5e82
TF		 2659
2660 return ret;
2661}
2662
2663static void ibmvnic_set_multi(struct net_device *netdev)
2664{
2665 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2666 struct netdev_hw_addr *ha;
2667 union ibmvnic_crq crq;
2668
2669 memset(&crq, 0, sizeof(crq));
2670 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2671 crq.request_capability.cmd = REQUEST_CAPABILITY;
2672
2673 if (netdev->flags & IFF_PROMISC) {
2674 if (!adapter->promisc_supported)
2675 return;
2676 } else {
2677 if (netdev->flags & IFF_ALLMULTI) {
2678 /* Accept all multicast */
2679 memset(&crq, 0, sizeof(crq));
2680 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
2681 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
2682 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
2683 ibmvnic_send_crq(adapter, &crq);
2684 } else if (netdev_mc_empty(netdev)) {
2685 /* Reject all multicast */
2686 memset(&crq, 0, sizeof(crq));
2687 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
2688 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
2689 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
2690 ibmvnic_send_crq(adapter, &crq);
2691 } else {
2692 /* Accept one or more multicast(s) */
2693 netdev_for_each_mc_addr(ha, netdev) {
2694 memset(&crq, 0, sizeof(crq));
2695 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
2696 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
2697 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
2698 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
2699 ha->addr);
2700 ibmvnic_send_crq(adapter, &crq);
2701 }
2702 }
2703 }
2704}
2705
62740e97 2706static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
032c5e82
TF		 2707{
2708 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 2709 union ibmvnic_crq crq;
9c4eaabd 2710 int rc;
032c5e82 2711
62740e97
TF		 2712 if (!is_valid_ether_addr(dev_addr)) {
2713 rc = -EADDRNOTAVAIL;
2714 goto err;
2715 }
032c5e82
TF		 2716
2717 memset(&crq, 0, sizeof(crq));
2718 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
2719 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
62740e97 2720 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
f813614f 2721
ff25dcb9
TF		 2722 mutex_lock(&adapter->fw_lock);
2723 adapter->fw_done_rc = 0;
070eca95 2724 reinit_completion(&adapter->fw_done);
ff25dcb9 2725
9c4eaabd 2726 rc = ibmvnic_send_crq(adapter, &crq);
62740e97
TF		 2727 if (rc) {
2728 rc = -EIO;
ff25dcb9 2729 mutex_unlock(&adapter->fw_lock);
62740e97
TF		 2730 goto err;
2731 }
2732
476d96ca 2733 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
032c5e82 2734 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
476d96ca 2735 if (rc || adapter->fw_done_rc) {
62740e97 2736 rc = -EIO;
ff25dcb9 2737 mutex_unlock(&adapter->fw_lock);
62740e97
TF		 2738 goto err;
2739 }
ff25dcb9 2740 mutex_unlock(&adapter->fw_lock);
62740e97
TF		 2741 return 0;
2742err:
2743 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
2744 return rc;
032c5e82
TF		 2745}
2746
c26eba03
JA		 2747static int ibmvnic_set_mac(struct net_device *netdev, void *p)
2748{
2749 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2750 struct sockaddr *addr = p;
f813614f 2751 int rc;
c26eba03 2752
62740e97 2753 rc = 0;
8fc3672a
LP		 2754 if (!is_valid_ether_addr(addr->sa_data))
2755 return -EADDRNOTAVAIL;
2756
67eb2114
JW		 2757 ether_addr_copy(adapter->mac_addr, addr->sa_data);
2758 if (adapter->state != VNIC_PROBED)
62740e97 2759 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
c26eba03 2760
f813614f 2761 return rc;
c26eba03
JA		 2762}
2763
caee7bf5
LP		 2764static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
2765{
2766 switch (reason) {
2767 case VNIC_RESET_FAILOVER:
2768 return "FAILOVER";
2769 case VNIC_RESET_MOBILITY:
2770 return "MOBILITY";
2771 case VNIC_RESET_FATAL:
2772 return "FATAL";
2773 case VNIC_RESET_NON_FATAL:
2774 return "NON_FATAL";
2775 case VNIC_RESET_TIMEOUT:
2776 return "TIMEOUT";
2777 case VNIC_RESET_CHANGE_PARAM:
2778 return "CHANGE_PARAM";
822ebc2c
LP		 2779 case VNIC_RESET_PASSIVE_INIT:
2780 return "PASSIVE_INIT";
caee7bf5 2781 }
07b5dc1d 2782 return "UNKNOWN";
caee7bf5
LP		 2783}
2784
ae16bf15
SB		 2785/*
2786 * Initialize the init_done completion and return code values. We
2787 * can get a transport event just after registering the CRQ and the
2788 * tasklet will use this to communicate the transport event. To ensure
2789 * we don't miss the notification/error, initialize these _before_
2790 * regisering the CRQ.
2791 */
2792static inline void reinit_init_done(struct ibmvnic_adapter *adapter)
2793{
2794 reinit_completion(&adapter->init_done);
2795 adapter->init_done_rc = 0;
2796}
2797
80708602 2798/*
ed651a10
NF		 2799 * do_reset returns zero if we are able to keep processing reset events, or
2800 * non-zero if we hit a fatal error and must halt.
2801 */
2802static int do_reset(struct ibmvnic_adapter *adapter,
2803 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 2804{
bbd80930 2805 struct net_device *netdev = adapter->netdev;
896d8695 2806 u64 old_num_rx_queues, old_num_tx_queues;
5bf032ef 2807 u64 old_num_rx_slots, old_num_tx_slots;
d3a6abcc 2808 int rc;
ed651a10 2809
38bd5cec 2810 netdev_dbg(adapter->netdev,
0666ef7f
LP		 2811 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n",
2812 adapter_state_to_string(adapter->state),
2813 adapter->failover_pending,
2814 reset_reason_to_string(rwi->reset_reason),
2815 adapter_state_to_string(reset_state));
d1cf33d9 2816
3f5ec374
LP		 2817 adapter->reset_reason = rwi->reset_reason;
2818 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
2819 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
2820 rtnl_lock();
2821
bab08bed 2822 /* Now that we have the rtnl lock, clear any pending failover.
1d850493
SB		 2823 * This will ensure ibmvnic_open() has either completed or will
2824 * block until failover is complete.
2825 */
2826 if (rwi->reset_reason == VNIC_RESET_FAILOVER)
2827 adapter->failover_pending = false;
b27507bb 2828
8f1c0fd2
SB		 2829 /* read the state and check (again) after getting rtnl */
2830 reset_state = adapter->state;
2831
2832 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
2833 rc = -EBUSY;
2834 goto out;
2835 }
2836
ed651a10 2837 netif_carrier_off(netdev);
ed651a10 2838
896d8695
JA		 2839 old_num_rx_queues = adapter->req_rx_queues;
2840 old_num_tx_queues = adapter->req_tx_queues;
5bf032ef
TF		 2841 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
2842 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
896d8695 2843
30f79625
NF		 2844 ibmvnic_cleanup(netdev);
2845
1f94608b
TF		 2846 if (reset_state == VNIC_OPEN &&
2847 adapter->reset_reason != VNIC_RESET_MOBILITY &&
30f79625 2848 adapter->reset_reason != VNIC_RESET_FAILOVER) {
3f5ec374
LP		 2849 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2850 rc = __ibmvnic_close(netdev);
2851 if (rc)
2852 goto out;
2853 } else {
2854 adapter->state = VNIC_CLOSING;
b27507bb 2855
3f5ec374
LP		 2856 /* Release the RTNL lock before link state change and
2857 * re-acquire after the link state change to allow
2858 * linkwatch_event to grab the RTNL lock and run during
2859 * a reset.
2860 */
2861 rtnl_unlock();
2862 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
2863 rtnl_lock();
2864 if (rc)
2865 goto out;
ed651a10 2866
8f1c0fd2
SB		 2867 if (adapter->state == VNIC_OPEN) {
2868 /* When we dropped rtnl, ibmvnic_open() got
2869 * it and noticed that we are resetting and
2870 * set the adapter state to OPEN. Update our
2871 * new "target" state, and resume the reset
2872 * from VNIC_CLOSING state.
2873 */
2874 netdev_dbg(netdev,
0666ef7f
LP		 2875 "Open changed state from %s, updating.\n",
2876 adapter_state_to_string(reset_state));
8f1c0fd2
SB		 2877 reset_state = VNIC_OPEN;
2878 adapter->state = VNIC_CLOSING;
2879 }
2880
3f5ec374 2881 if (adapter->state != VNIC_CLOSING) {
8f1c0fd2
SB		 2882 /* If someone else changed the adapter state
2883 * when we dropped the rtnl, fail the reset
2884 */
b6ee566c 2885 rc = -EAGAIN;
3f5ec374
LP		 2886 goto out;
2887 }
3f5ec374 2888 adapter->state = VNIC_CLOSED;
b27507bb 2889 }
3f5ec374 2890 }
b27507bb 2891
3f5ec374
LP		 2892 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2893 release_resources(adapter);
2894 release_sub_crqs(adapter, 1);
2895 release_crq_queue(adapter);
c26eba03
JA		 2896 }
2897
8cb31cfc
JA		 2898 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
2899 /* remove the closed state so when we call open it appears
2900 * we are coming from the probed state.
2901 */
2902 adapter->state = VNIC_PROBED;
032c5e82 2903
ae16bf15
SB		 2904 reinit_init_done(adapter);
2905
3f5ec374
LP		 2906 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2907 rc = init_crq_queue(adapter);
2908 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
30f79625
NF		 2909 rc = ibmvnic_reenable_crq_queue(adapter);
2910 release_sub_crqs(adapter, 1);
2911 } else {
2912 rc = ibmvnic_reset_crq(adapter);
8b40eb73 2913 if (rc == H_CLOSED || rc == H_SUCCESS) {
30f79625 2914 rc = vio_enable_interrupts(adapter->vdev);
8b40eb73
DM		 2915 if (rc)
2916 netdev_err(adapter->netdev,
2917 "Reset failed to enable interrupts. rc=%d\n",
2918 rc);
2919 }
30f79625
NF		 2920 }
2921
2922 if (rc) {
2923 netdev_err(adapter->netdev,
8b40eb73 2924 "Reset couldn't initialize crq. rc=%d\n", rc);
b27507bb 2925 goto out;
30f79625
NF		 2926 }
2927
635e442f 2928 rc = ibmvnic_reset_init(adapter, true);
b6ee566c 2929 if (rc)
b27507bb 2930 goto out;
ed651a10 2931
53f8b1b2 2932 /* If the adapter was in PROBE or DOWN state prior to the reset,
8cb31cfc
JA		 2933 * exit here.
2934 */
53f8b1b2 2935 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) {
b27507bb
JK		 2936 rc = 0;
2937 goto out;
2938 }
ed651a10 2939
8cb31cfc 2940 rc = ibmvnic_login(netdev);
f78afaac 2941 if (rc)
b27507bb 2942 goto out;
ed651a10 2943
3f5ec374
LP		 2944 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2945 rc = init_resources(adapter);
2946 if (rc)
2947 goto out;
2948 } else if (adapter->req_rx_queues != old_num_rx_queues ||
b27507bb
JK		 2949 adapter->req_tx_queues != old_num_tx_queues ||
2950 adapter->req_rx_add_entries_per_subcrq !=
2951 old_num_rx_slots ||
2952 adapter->req_tx_entries_per_subcrq !=
9f134573
MC		 2953 old_num_tx_slots ||
2954 !adapter->rx_pool ||
2955 !adapter->tso_pool ||
2956 !adapter->tx_pool) {
86f669b2 2957 release_napi(adapter);
a5681e20
JK		 2958 release_vpd_data(adapter);
2959
2960 rc = init_resources(adapter);
f611a5b4 2961 if (rc)
b27507bb 2962 goto out;
a5681e20 2963
c26eba03 2964 } else {
bbd80930 2965 rc = init_tx_pools(netdev);
8ae4dff8 2966 if (rc) {
bbd80930
SB		 2967 netdev_dbg(netdev,
2968 "init tx pools failed (%d)\n",
91dc5d25 2969 rc);
b27507bb 2970 goto out;
8ae4dff8 2971 }
8c0543ad 2972
489de956 2973 rc = init_rx_pools(netdev);
8ae4dff8 2974 if (rc) {
489de956
SB		 2975 netdev_dbg(netdev,
2976 "init rx pools failed (%d)\n",
91dc5d25 2977 rc);
b27507bb 2978 goto out;
8ae4dff8 2979 }
c26eba03 2980 }
134bbe7f 2981 ibmvnic_disable_irqs(adapter);
8cb31cfc 2982 }
e676d81c
JA		 2983 adapter->state = VNIC_CLOSED;
2984
b27507bb
JK		 2985 if (reset_state == VNIC_CLOSED) {
2986 rc = 0;
2987 goto out;
2988 }
e676d81c 2989
ed651a10
NF		 2990 rc = __ibmvnic_open(netdev);
2991 if (rc) {
b27507bb
JK		 2992 rc = IBMVNIC_OPEN_FAILED;
2993 goto out;
ed651a10
NF		 2994 }
2995
be32a243
TF		 2996 /* refresh device's multicast list */
2997 ibmvnic_set_multi(netdev);
2998
98025bce 2999 if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
6be46662
LP		 3000 adapter->reset_reason == VNIC_RESET_MOBILITY)
3001 __netdev_notify_peers(netdev);
61d3e1d9 3002
b27507bb
JK		 3003 rc = 0;
3004
3005out:
0cb4bc66
DM		 3006 /* restore the adapter state if reset failed */
3007 if (rc)
3008 adapter->state = reset_state;
3f5ec374
LP		 3009 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */
3010 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
3011 rtnl_unlock();
b27507bb 3012
0666ef7f
LP		 3013 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n",
3014 adapter_state_to_string(adapter->state),
3015 adapter->failover_pending, rc);
b27507bb 3016 return rc;
ed651a10
NF		 3017}
3018
2770a798
TF		 3019static int do_hard_reset(struct ibmvnic_adapter *adapter,
3020 struct ibmvnic_rwi *rwi, u32 reset_state)
3021{
3022 struct net_device *netdev = adapter->netdev;
3023 int rc;
3024
caee7bf5
LP		 3025 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n",
3026 reset_reason_to_string(rwi->reset_reason));
2770a798 3027
8f1c0fd2
SB		 3028 /* read the state and check (again) after getting rtnl */
3029 reset_state = adapter->state;
3030
3031 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
3032 rc = -EBUSY;
3033 goto out;
3034 }
3035
2770a798
TF		 3036 netif_carrier_off(netdev);
3037 adapter->reset_reason = rwi->reset_reason;
3038
3039 ibmvnic_cleanup(netdev);
3040 release_resources(adapter);
3041 release_sub_crqs(adapter, 0);
3042 release_crq_queue(adapter);
3043
3044 /* remove the closed state so when we call open it appears
3045 * we are coming from the probed state.
3046 */
3047 adapter->state = VNIC_PROBED;
3048
ae16bf15
SB		 3049 reinit_init_done(adapter);
3050
2770a798
TF		 3051 rc = init_crq_queue(adapter);
3052 if (rc) {
3053 netdev_err(adapter->netdev,
3054 "Couldn't initialize crq. rc=%d\n", rc);
0cb4bc66 3055 goto out;
2770a798
TF		 3056 }
3057
635e442f 3058 rc = ibmvnic_reset_init(adapter, false);
2770a798 3059 if (rc)
0cb4bc66 3060 goto out;
2770a798 3061
53f8b1b2 3062 /* If the adapter was in PROBE or DOWN state prior to the reset,
2770a798
TF		 3063 * exit here.
3064 */
53f8b1b2 3065 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN)
0cb4bc66 3066 goto out;
2770a798
TF		 3067
3068 rc = ibmvnic_login(netdev);
0cb4bc66
DM		 3069 if (rc)
3070 goto out;
a5681e20
JK		 3071
3072 rc = init_resources(adapter);
2770a798 3073 if (rc)
0cb4bc66 3074 goto out;
2770a798
TF		 3075
3076 ibmvnic_disable_irqs(adapter);
3077 adapter->state = VNIC_CLOSED;
3078
3079 if (reset_state == VNIC_CLOSED)
0cb4bc66 3080 goto out;
2770a798
TF		 3081
3082 rc = __ibmvnic_open(netdev);
0cb4bc66
DM		 3083 if (rc) {
3084 rc = IBMVNIC_OPEN_FAILED;
3085 goto out;
3086 }
2770a798 3087
6be46662 3088 __netdev_notify_peers(netdev);
0cb4bc66
DM		 3089out:
3090 /* restore adapter state if reset failed */
3091 if (rc)
3092 adapter->state = reset_state;
0666ef7f
LP		 3093 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n",
3094 adapter_state_to_string(adapter->state),
3095 adapter->failover_pending, rc);
0cb4bc66 3096 return rc;
2770a798
TF		 3097}
3098
ed651a10
NF		 3099static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
3100{
3101 struct ibmvnic_rwi *rwi;
6c5c7489 3102 unsigned long flags;
ed651a10 3103
6c5c7489 3104 spin_lock_irqsave(&adapter->rwi_lock, flags);
ed651a10
NF		 3105
3106 if (!list_empty(&adapter->rwi_list)) {
3107 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
3108 list);
3109 list_del(&rwi->list);
3110 } else {
3111 rwi = NULL;
3112 }
3113
6c5c7489 3114 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
ed651a10
NF		 3115 return rwi;
3116}
3117
53f8b1b2
CF		 3118/**
3119 * do_passive_init - complete probing when partner device is detected.
3120 * @adapter: ibmvnic_adapter struct
3121 *
3122 * If the ibmvnic device does not have a partner device to communicate with at boot
3123 * and that partner device comes online at a later time, this function is called
3124 * to complete the initialization process of ibmvnic device.
3125 * Caller is expected to hold rtnl_lock().
3126 *
3127 * Returns non-zero if sub-CRQs are not initialized properly leaving the device
3128 * in the down state.
3129 * Returns 0 upon success and the device is in PROBED state.
3130 */
3131
3132static int do_passive_init(struct ibmvnic_adapter *adapter)
3133{
3134 unsigned long timeout = msecs_to_jiffies(30000);
3135 struct net_device *netdev = adapter->netdev;
3136 struct device *dev = &adapter->vdev->dev;
3137 int rc;
3138
3139 netdev_dbg(netdev, "Partner device found, probing.\n");
3140
3141 adapter->state = VNIC_PROBING;
3142 reinit_completion(&adapter->init_done);
3143 adapter->init_done_rc = 0;
3144 adapter->crq.active = true;
3145
3146 rc = send_crq_init_complete(adapter);
3147 if (rc)
3148 goto out;
3149
3150 rc = send_version_xchg(adapter);
3151 if (rc)
3152 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc);
3153
3154 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3155 dev_err(dev, "Initialization sequence timed out\n");
3156 rc = -ETIMEDOUT;
3157 goto out;
3158 }
3159
3160 rc = init_sub_crqs(adapter);
3161 if (rc) {
3162 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc);
3163 goto out;
3164 }
3165
3166 rc = init_sub_crq_irqs(adapter);
3167 if (rc) {
3168 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc);
3169 goto init_failed;
3170 }
3171
3172 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3173 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3174 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3175
3176 adapter->state = VNIC_PROBED;
3177 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n");
3178
3179 return 0;
3180
3181init_failed:
3182 release_sub_crqs(adapter, 1);
3183out:
3184 adapter->state = VNIC_DOWN;
3185 return rc;
3186}
3187
ed651a10
NF		 3188static void __ibmvnic_reset(struct work_struct *work)
3189{
ed651a10 3190 struct ibmvnic_adapter *adapter;
fd98693c 3191 unsigned int timeout = 5000;
4f408e1f 3192 struct ibmvnic_rwi *tmprwi;
fd98693c 3193 bool saved_state = false;
4f408e1f 3194 struct ibmvnic_rwi *rwi;
7d7195a0 3195 unsigned long flags;
fd98693c
SB		 3196 struct device *dev;
3197 bool need_reset;
db9f0e8b 3198 int num_fails = 0;
fd98693c 3199 u32 reset_state;
c26eba03 3200 int rc = 0;
ed651a10
NF		 3201
3202 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
fd98693c 3203 dev = &adapter->vdev->dev;
ed651a10 3204
fd98693c
SB		 3205 /* Wait for ibmvnic_probe() to complete. If probe is taking too long
3206 * or if another reset is in progress, defer work for now. If probe
3207 * eventually fails it will flush and terminate our work.
3208 *
3209 * Three possibilities here:
3210 * 1. Adpater being removed - just return
3211 * 2. Timed out on probe or another reset in progress - delay the work
3212 * 3. Completed probe - perform any resets in queue
3213 */
3214 if (adapter->state == VNIC_PROBING &&
3215 !wait_for_completion_timeout(&adapter->probe_done, timeout)) {
3216 dev_err(dev, "Reset thread timed out on probe");
870e04ae
LP		 3217 queue_delayed_work(system_long_wq,
3218 &adapter->ibmvnic_delayed_reset,
3219 IBMVNIC_RESET_DELAY);
7ed5b31f
JK		 3220 return;
3221 }
3222
fd98693c
SB		 3223 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */
3224 if (adapter->state == VNIC_REMOVING)
3225 return;
3226
3227 /* ->rwi_list is stable now (no one else is removing entries) */
3228
3229 /* ibmvnic_probe() may have purged the reset queue after we were
3230 * scheduled to process a reset so there maybe no resets to process.
3231 * Before setting the ->resetting bit though, we have to make sure
3232 * that there is infact a reset to process. Otherwise we may race
3233 * with ibmvnic_open() and end up leaving the vnic down:
3234 *
3235 * __ibmvnic_reset() ibmvnic_open()
3236 * ----------------- --------------
3237 *
3238 * set ->resetting bit
3239 * find ->resetting bit is set
3240 * set ->state to IBMVNIC_OPEN (i.e
3241 * assume reset will open device)
3242 * return
3243 * find reset queue empty
3244 * return
3245 *
3246 * Neither performed vnic login/open and vnic stays down
3247 *
3248 * If we hold the lock and conditionally set the bit, either we
3249 * or ibmvnic_open() will complete the open.
3250 */
3251 need_reset = false;
3252 spin_lock(&adapter->rwi_lock);
3253 if (!list_empty(&adapter->rwi_list)) {
3254 if (test_and_set_bit_lock(0, &adapter->resetting)) {
3255 queue_delayed_work(system_long_wq,
3256 &adapter->ibmvnic_delayed_reset,
3257 IBMVNIC_RESET_DELAY);
3258 } else {
3259 need_reset = true;
3260 }
3261 }
3262 spin_unlock(&adapter->rwi_lock);
3263
3264 if (!need_reset)
3265 return;
3266
ed651a10
NF		 3267 rwi = get_next_rwi(adapter);
3268 while (rwi) {
7d7195a0
JK		 3269 spin_lock_irqsave(&adapter->state_lock, flags);
3270
36f1031c 3271 if (adapter->state == VNIC_REMOVING ||
c8dc5595 3272 adapter->state == VNIC_REMOVED) {
7d7195a0 3273 spin_unlock_irqrestore(&adapter->state_lock, flags);
1c2977c0
JK		 3274 kfree(rwi);
3275 rc = EBUSY;
3276 break;
3277 }
36f1031c 3278
7d7195a0
JK		 3279 if (!saved_state) {
3280 reset_state = adapter->state;
7d7195a0
JK		 3281 saved_state = true;
3282 }
3283 spin_unlock_irqrestore(&adapter->state_lock, flags);
3284
53f8b1b2
CF		 3285 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) {
3286 rtnl_lock();
3287 rc = do_passive_init(adapter);
3288 rtnl_unlock();
3289 if (!rc)
3290 netif_carrier_on(adapter->netdev);
3291 } else if (adapter->force_reset_recovery) {
bab08bed 3292 /* Since we are doing a hard reset now, clear the
1d850493
SB		 3293 * failover_pending flag so we don't ignore any
3294 * future MOBILITY or other resets.
3295 */
3296 adapter->failover_pending = false;
3297
b27507bb
JK		 3298 /* Transport event occurred during previous reset */
3299 if (adapter->wait_for_reset) {
3300 /* Previous was CHANGE_PARAM; caller locked */
3301 adapter->force_reset_recovery = false;
3302 rc = do_hard_reset(adapter, rwi, reset_state);
3303 } else {
3304 rtnl_lock();
3305 adapter->force_reset_recovery = false;
3306 rc = do_hard_reset(adapter, rwi, reset_state);
3307 rtnl_unlock();
3308 }
db9f0e8b
SB		 3309 if (rc)
3310 num_fails++;
3311 else
3312 num_fails = 0;
3313
3314 /* If auto-priority-failover is enabled we can get
3315 * back to back failovers during resets, resulting
3316 * in at least two failed resets (from high-priority
3317 * backing device to low-priority one and then back)
3318 * If resets continue to fail beyond that, give the
3319 * adapter some time to settle down before retrying.
3320 */
3321 if (num_fails >= 3) {
f15fde9d 3322 netdev_dbg(adapter->netdev,
db9f0e8b
SB		 3323 "[S:%s] Hard reset failed %d times, waiting 60 secs\n",
3324 adapter_state_to_string(adapter->state),
3325 num_fails);
f15fde9d
SB		 3326 set_current_state(TASK_UNINTERRUPTIBLE);
3327 schedule_timeout(60 * HZ);
3328 }
1f45dc22 3329 } else {
2770a798
TF		 3330 rc = do_reset(adapter, rwi, reset_state);
3331 }
4f408e1f 3332 tmprwi = rwi;
a86d5c68 3333 adapter->last_reset_time = jiffies;
0cb4bc66 3334
18f141bf
DM		 3335 if (rc)
3336 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc);
ed651a10
NF		 3337
3338 rwi = get_next_rwi(adapter);
7ed5b31f 3339
4f408e1f 3340 /*
4f408e1f
SB		 3341 * If there are no resets queued and the previous reset failed,
3342 * the adapter would be in an undefined state. So retry the
3343 * previous reset as a hard reset.
d6dd2fe7
NC		 3344 *
3345 * Else, free the previous rwi and, if there is another reset
3346 * queued, process the new reset even if previous reset failed
3347 * (the previous reset could have failed because of a fail
3348 * over for instance, so process the fail over).
4f408e1f 3349 */
d6dd2fe7 3350 if (!rwi && rc)
4f408e1f 3351 rwi = tmprwi;
d6dd2fe7
NC		 3352 else
3353 kfree(tmprwi);
4f408e1f 3354
7ed5b31f 3355 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
4f408e1f 3356 rwi->reset_reason == VNIC_RESET_MOBILITY || rc))
7ed5b31f 3357 adapter->force_reset_recovery = true;
ed651a10
NF		 3358 }
3359
c26eba03 3360 if (adapter->wait_for_reset) {
c26eba03
JA		 3361 adapter->reset_done_rc = rc;
3362 complete(&adapter->reset_done);
3363 }
3364
7ed5b31f 3365 clear_bit_unlock(0, &adapter->resetting);
38bd5cec
SB		 3366
3367 netdev_dbg(adapter->netdev,
0666ef7f
LP		 3368 "[S:%s FRR:%d WFR:%d] Done processing resets\n",
3369 adapter_state_to_string(adapter->state),
3370 adapter->force_reset_recovery,
38bd5cec 3371 adapter->wait_for_reset);
7ed5b31f
JK		 3372}
3373
3374static void __ibmvnic_delayed_reset(struct work_struct *work)
3375{
3376 struct ibmvnic_adapter *adapter;
3377
3378 adapter = container_of(work, struct ibmvnic_adapter,
3379 ibmvnic_delayed_reset.work);
3380 __ibmvnic_reset(&adapter->ibmvnic_reset);
ed651a10
NF		 3381}
3382
83da53f7
SB		 3383static void flush_reset_queue(struct ibmvnic_adapter *adapter)
3384{
3385 struct list_head *entry, *tmp_entry;
3386
3387 if (!list_empty(&adapter->rwi_list)) {
3388 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) {
3389 list_del(entry);
3390 kfree(list_entry(entry, struct ibmvnic_rwi, list));
3391 }
3392 }
3393}
3394
af894d23
TF		 3395static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
3396 enum ibmvnic_reset_reason reason)
ed651a10 3397{
ed651a10 3398 struct net_device *netdev = adapter->netdev;
83da53f7 3399 struct ibmvnic_rwi *rwi, *tmp;
6c5c7489 3400 unsigned long flags;
af894d23 3401 int ret;
ed651a10 3402
b646acd5
JK		 3403 spin_lock_irqsave(&adapter->rwi_lock, flags);
3404
3405 /* If failover is pending don't schedule any other reset.
1d850493
SB		 3406 * Instead let the failover complete. If there is already a
3407 * a failover reset scheduled, we will detect and drop the
3408 * duplicate reset when walking the ->rwi_list below.
3409 */
ed651a10 3410 if (adapter->state == VNIC_REMOVING ||
5a18e1e0 3411 adapter->state == VNIC_REMOVED ||
1d850493 3412 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
af894d23 3413 ret = EBUSY;
5a18e1e0 3414 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
af894d23 3415 goto err;
ed651a10
NF		 3416 }
3417
3e98ae00 3418 list_for_each_entry(tmp, &adapter->rwi_list, list) {
ed651a10 3419 if (tmp->reset_reason == reason) {
caee7bf5
LP		 3420 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n",
3421 reset_reason_to_string(reason));
af894d23
TF		 3422 ret = EBUSY;
3423 goto err;
ed651a10
NF		 3424 }
3425 }
3426
1d1bbc37 3427 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
ed651a10 3428 if (!rwi) {
af894d23
TF		 3429 ret = ENOMEM;
3430 goto err;
ed651a10 3431 }
2770a798
TF		 3432 /* if we just received a transport event,
3433 * flush reset queue and process this reset
3434 */
83da53f7
SB		 3435 if (adapter->force_reset_recovery)
3436 flush_reset_queue(adapter);
3437
ed651a10
NF		 3438 rwi->reset_reason = reason;
3439 list_add_tail(&rwi->list, &adapter->rwi_list);
caee7bf5
LP		 3440 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n",
3441 reset_reason_to_string(reason));
870e04ae 3442 queue_work(system_long_wq, &adapter->ibmvnic_reset);
af894d23 3443
4a41c421 3444 ret = 0;
af894d23 3445err:
4a41c421
SB		 3446 /* ibmvnic_close() below can block, so drop the lock first */
3447 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
3448
3449 if (ret == ENOMEM)
3450 ibmvnic_close(netdev);
3451
af894d23 3452 return -ret;
ed651a10
NF		 3453}
3454
0290bd29 3455static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
ed651a10
NF		 3456{
3457 struct ibmvnic_adapter *adapter = netdev_priv(dev);
3458
855a631a
LP		 3459 if (test_bit(0, &adapter->resetting)) {
3460 netdev_err(adapter->netdev,
3461 "Adapter is resetting, skip timeout reset\n");
3462 return;
3463 }
a86d5c68
DM		 3464 /* No queuing up reset until at least 5 seconds (default watchdog val)
3465 * after last reset
3466 */
3467 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) {
3468 netdev_dbg(dev, "Not yet time to tx timeout.\n");
3469 return;
3470 }
ed651a10 3471 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 3472}
3473
3474static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
3475 struct ibmvnic_rx_buff *rx_buff)
3476{
3477 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
3478
3479 rx_buff->skb = NULL;
3480
3481 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
3482 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
3483
3484 atomic_dec(&pool->available);
3485}
3486
3487static int ibmvnic_poll(struct napi_struct *napi, int budget)
3488{
ec20f36b
DB		 3489 struct ibmvnic_sub_crq_queue *rx_scrq;
3490 struct ibmvnic_adapter *adapter;
3491 struct net_device *netdev;
3492 int frames_processed;
3493 int scrq_num;
3494
3495 netdev = napi->dev;
3496 adapter = netdev_priv(netdev);
3497 scrq_num = (int)(napi - adapter->napi);
3498 frames_processed = 0;
3499 rx_scrq = adapter->rx_scrq[scrq_num];
152ce47d 3500
032c5e82
TF		 3501restart_poll:
3502 while (frames_processed < budget) {
3503 struct sk_buff *skb;
3504 struct ibmvnic_rx_buff *rx_buff;
3505 union sub_crq *next;
3506 u32 length;
3507 u16 offset;
3508 u8 flags = 0;
3509
7ed5b31f 3510 if (unlikely(test_bit(0, &adapter->resetting) &&
3468656f 3511 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
ec20f36b 3512 enable_scrq_irq(adapter, rx_scrq);
21ecba6c
TF		 3513 napi_complete_done(napi, frames_processed);
3514 return frames_processed;
3515 }
3516
ec20f36b 3517 if (!pending_scrq(adapter, rx_scrq))
032c5e82 3518 break;
ec20f36b 3519 next = ibmvnic_next_scrq(adapter, rx_scrq);
914789ac
LP		 3520 rx_buff = (struct ibmvnic_rx_buff *)
3521 be64_to_cpu(next->rx_comp.correlator);
032c5e82
TF		 3522 /* do error checking */
3523 if (next->rx_comp.rc) {
e1cea2e7
JA		 3524 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
3525 be16_to_cpu(next->rx_comp.rc));
032c5e82
TF		 3526 /* free the entry */
3527 next->rx_comp.first = 0;
4b9b0f01 3528 dev_kfree_skb_any(rx_buff->skb);
032c5e82 3529 remove_buff_from_pool(adapter, rx_buff);
ca05e316 3530 continue;
abe27a88
TF		 3531 } else if (!rx_buff->skb) {
3532 /* free the entry */
3533 next->rx_comp.first = 0;
3534 remove_buff_from_pool(adapter, rx_buff);
3535 continue;
032c5e82
TF		 3536 }
3537
3538 length = be32_to_cpu(next->rx_comp.len);
3539 offset = be16_to_cpu(next->rx_comp.off_frame_data);
3540 flags = next->rx_comp.flags;
3541 skb = rx_buff->skb;
42557dab
LP		 3542 /* load long_term_buff before copying to skb */
3543 dma_rmb();
032c5e82
TF		 3544 skb_copy_to_linear_data(skb, rx_buff->data + offset,
3545 length);
6052d5e2
MFV		 3546
3547 /* VLAN Header has been stripped by the system firmware and
3548 * needs to be inserted by the driver
3549 */
3550 if (adapter->rx_vlan_header_insertion &&
3551 (flags & IBMVNIC_VLAN_STRIPPED))
3552 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
3553 ntohs(next->rx_comp.vlan_tci));
3554
032c5e82
TF		 3555 /* free the entry */
3556 next->rx_comp.first = 0;
3557 remove_buff_from_pool(adapter, rx_buff);
3558
3559 skb_put(skb, length);
3560 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 3561 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 3562
3563 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
3564 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
3565 skb->ip_summed = CHECKSUM_UNNECESSARY;
3566 }
3567
3568 length = skb->len;
3569 napi_gro_receive(napi, skb); /* send it up */
3570 netdev->stats.rx_packets++;
3571 netdev->stats.rx_bytes += length;
3d52b594
JA		 3572 adapter->rx_stats_buffers[scrq_num].packets++;
3573 adapter->rx_stats_buffers[scrq_num].bytes += length;
032c5e82
TF		 3574 frames_processed++;
3575 }
152ce47d 3576
41ed0a00 3577 if (adapter->state != VNIC_CLOSING &&
dda10fc8
NC		 3578 (atomic_read(&adapter->rx_pool[scrq_num].available) <
3579 adapter->req_rx_add_entries_per_subcrq / 2))
152ce47d 3580 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82 3581 if (frames_processed < budget) {
ec20f36b
DB		 3582 if (napi_complete_done(napi, frames_processed)) {
3583 enable_scrq_irq(adapter, rx_scrq);
3584 if (pending_scrq(adapter, rx_scrq)) {
73382e91 3585 if (napi_schedule(napi)) {
ec20f36b
DB		 3586 disable_scrq_irq(adapter, rx_scrq);
3587 goto restart_poll;
3588 }
3589 }
032c5e82
TF		 3590 }
3591 }
3592 return frames_processed;
3593}
3594
c26eba03
JA		 3595static int wait_for_reset(struct ibmvnic_adapter *adapter)
3596{
af894d23
TF		 3597 int rc, ret;
3598
c26eba03
JA		 3599 adapter->fallback.mtu = adapter->req_mtu;
3600 adapter->fallback.rx_queues = adapter->req_rx_queues;
3601 adapter->fallback.tx_queues = adapter->req_tx_queues;
3602 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
3603 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
3604
070eca95 3605 reinit_completion(&adapter->reset_done);
c26eba03 3606 adapter->wait_for_reset = true;
af894d23 3607 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
476d96ca
TF		 3608
3609 if (rc) {
3610 ret = rc;
3611 goto out;
3612 }
3613 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
3614 if (rc) {
3615 ret = -ENODEV;
3616 goto out;
3617 }
c26eba03 3618
af894d23 3619 ret = 0;
c26eba03 3620 if (adapter->reset_done_rc) {
af894d23 3621 ret = -EIO;
c26eba03
JA		 3622 adapter->desired.mtu = adapter->fallback.mtu;
3623 adapter->desired.rx_queues = adapter->fallback.rx_queues;
3624 adapter->desired.tx_queues = adapter->fallback.tx_queues;
3625 adapter->desired.rx_entries = adapter->fallback.rx_entries;
3626 adapter->desired.tx_entries = adapter->fallback.tx_entries;
3627
070eca95 3628 reinit_completion(&adapter->reset_done);
af894d23
TF		 3629 adapter->wait_for_reset = true;
3630 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
476d96ca
TF		 3631 if (rc) {
3632 ret = rc;
3633 goto out;
3634 }
3635 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
3636 60000);
3637 if (rc) {
3638 ret = -ENODEV;
3639 goto out;
3640 }
c26eba03 3641 }
476d96ca 3642out:
c26eba03
JA		 3643 adapter->wait_for_reset = false;
3644
af894d23 3645 return ret;
c26eba03
JA		 3646}
3647
3a807b75
JA		 3648static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
3649{
c26eba03
JA		 3650 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3651
3652 adapter->desired.mtu = new_mtu + ETH_HLEN;
3653
3654 return wait_for_reset(adapter);
3a807b75
JA		 3655}
3656
f10b09ef
TF		 3657static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
3658 struct net_device *dev,
3659 netdev_features_t features)
3660{
3661 /* Some backing hardware adapters can not
3662 * handle packets with a MSS less than 224
3663 * or with only one segment.
3664 */
3665 if (skb_is_gso(skb)) {
3666 if (skb_shinfo(skb)->gso_size < 224 ||
3667 skb_shinfo(skb)->gso_segs == 1)
3668 features &= ~NETIF_F_GSO_MASK;
3669 }
3670
3671 return features;
3672}
3673
032c5e82
TF		 3674static const struct net_device_ops ibmvnic_netdev_ops = {
3675 .ndo_open = ibmvnic_open,
3676 .ndo_stop = ibmvnic_close,
3677 .ndo_start_xmit = ibmvnic_xmit,
3678 .ndo_set_rx_mode = ibmvnic_set_multi,
3679 .ndo_set_mac_address = ibmvnic_set_mac,
3680 .ndo_validate_addr = eth_validate_addr,
032c5e82 3681 .ndo_tx_timeout = ibmvnic_tx_timeout,
3a807b75 3682 .ndo_change_mtu = ibmvnic_change_mtu,
f10b09ef 3683 .ndo_features_check = ibmvnic_features_check,
032c5e82
TF		 3684};
3685
3686/* ethtool functions */
3687
8a43379f
PR		 3688static int ibmvnic_get_link_ksettings(struct net_device *netdev,
3689 struct ethtool_link_ksettings *cmd)
032c5e82 3690{
f8d6ae0d
MFV		 3691 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3692 int rc;
3693
3694 rc = send_query_phys_parms(adapter);
3695 if (rc) {
3696 adapter->speed = SPEED_UNKNOWN;
3697 adapter->duplex = DUPLEX_UNKNOWN;
3698 }
3699 cmd->base.speed = adapter->speed;
3700 cmd->base.duplex = adapter->duplex;
8a43379f
PR		 3701 cmd->base.port = PORT_FIBRE;
3702 cmd->base.phy_address = 0;
3703 cmd->base.autoneg = AUTONEG_ENABLE;
3704
032c5e82
TF		 3705 return 0;
3706}
3707
4e6759be 3708static void ibmvnic_get_drvinfo(struct net_device *netdev,
032c5e82
TF		 3709 struct ethtool_drvinfo *info)
3710{
4e6759be
DANR		 3711 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3712
8a96c80e
LP		 3713 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
3714 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
3715 strscpy(info->fw_version, adapter->fw_version,
4e6759be 3716 sizeof(info->fw_version));
032c5e82
TF		 3717}
3718
3719static u32 ibmvnic_get_msglevel(struct net_device *netdev)
3720{
3721 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3722
3723 return adapter->msg_enable;
3724}
3725
3726static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
3727{
3728 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3729
3730 adapter->msg_enable = data;
3731}
3732
3733static u32 ibmvnic_get_link(struct net_device *netdev)
3734{
3735 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3736
3737 /* Don't need to send a query because we request a logical link up at
3738 * init and then we wait for link state indications
3739 */
3740 return adapter->logical_link_state;
3741}
3742
3743static void ibmvnic_get_ringparam(struct net_device *netdev,
74624944
HC		 3744 struct ethtool_ringparam *ring,
3745 struct kernel_ethtool_ringparam *kernel_ring,
3746 struct netlink_ext_ack *extack)
032c5e82 3747{
bc131b3a
JA		 3748 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3749
aeaf59b7
DM		 3750 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
3751 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
032c5e82
TF		 3752 ring->rx_mini_max_pending = 0;
3753 ring->rx_jumbo_max_pending = 0;
bc131b3a
JA		 3754 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
3755 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 3756 ring->rx_mini_pending = 0;
3757 ring->rx_jumbo_pending = 0;
3758}
3759
c26eba03 3760static int ibmvnic_set_ringparam(struct net_device *netdev,
74624944
HC		 3761 struct ethtool_ringparam *ring,
3762 struct kernel_ethtool_ringparam *kernel_ring,
3763 struct netlink_ext_ack *extack)
c26eba03
JA		 3764{
3765 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3766
aeaf59b7
DM		 3767 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
3768 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
3769 netdev_err(netdev, "Invalid request.\n");
3770 netdev_err(netdev, "Max tx buffers = %llu\n",
3771 adapter->max_rx_add_entries_per_subcrq);
3772 netdev_err(netdev, "Max rx buffers = %llu\n",
3773 adapter->max_tx_entries_per_subcrq);
3774 return -EINVAL;
3775 }
3776
c26eba03
JA		 3777 adapter->desired.rx_entries = ring->rx_pending;
3778 adapter->desired.tx_entries = ring->tx_pending;
3779
aeaf59b7 3780 return wait_for_reset(adapter);
c26eba03
JA		 3781}
3782
c2dbeb67
JA		 3783static void ibmvnic_get_channels(struct net_device *netdev,
3784 struct ethtool_channels *channels)
3785{
3786 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3787
aeaf59b7
DM		 3788 channels->max_rx = adapter->max_rx_queues;
3789 channels->max_tx = adapter->max_tx_queues;
c2dbeb67
JA		 3790 channels->max_other = 0;
3791 channels->max_combined = 0;
3792 channels->rx_count = adapter->req_rx_queues;
3793 channels->tx_count = adapter->req_tx_queues;
3794 channels->other_count = 0;
3795 channels->combined_count = 0;
3796}
3797
c26eba03
JA		 3798static int ibmvnic_set_channels(struct net_device *netdev,
3799 struct ethtool_channels *channels)
3800{
3801 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3802
3803 adapter->desired.rx_queues = channels->rx_count;
3804 adapter->desired.tx_queues = channels->tx_count;
3805
aeaf59b7 3806 return wait_for_reset(adapter);
c26eba03
JA		 3807}
3808
032c5e82
TF		 3809static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
3810{
3d52b594 3811 struct ibmvnic_adapter *adapter = netdev_priv(dev);
032c5e82
TF		 3812 int i;
3813
aeaf59b7
DM		 3814 if (stringset != ETH_SS_STATS)
3815 return;
032c5e82 3816
89abb6b3
RP		 3817 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
3818 ethtool_puts(&data, ibmvnic_stats[i].name);
3d52b594 3819
aeaf59b7 3820 for (i = 0; i < adapter->req_tx_queues; i++) {
89abb6b3
RP		 3821 ethtool_sprintf(&data, "tx%d_batched_packets", i);
3822 ethtool_sprintf(&data, "tx%d_direct_packets", i);
3823 ethtool_sprintf(&data, "tx%d_bytes", i);
3824 ethtool_sprintf(&data, "tx%d_dropped_packets", i);
aeaf59b7 3825 }
3d52b594 3826
aeaf59b7 3827 for (i = 0; i < adapter->req_rx_queues; i++) {
89abb6b3
RP		 3828 ethtool_sprintf(&data, "rx%d_packets", i);
3829 ethtool_sprintf(&data, "rx%d_bytes", i);
3830 ethtool_sprintf(&data, "rx%d_interrupts", i);
3d52b594 3831 }
032c5e82
TF		 3832}
3833
3834static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
3835{
3d52b594
JA		 3836 struct ibmvnic_adapter *adapter = netdev_priv(dev);
3837
032c5e82
TF		 3838 switch (sset) {
3839 case ETH_SS_STATS:
3d52b594
JA		 3840 return ARRAY_SIZE(ibmvnic_stats) +
3841 adapter->req_tx_queues * NUM_TX_STATS +
3842 adapter->req_rx_queues * NUM_RX_STATS;
032c5e82
TF		 3843 default:
3844 return -EOPNOTSUPP;
3845 }
3846}
3847
3848static void ibmvnic_get_ethtool_stats(struct net_device *dev,
3849 struct ethtool_stats *stats, u64 *data)
3850{
3851 struct ibmvnic_adapter *adapter = netdev_priv(dev);
3852 union ibmvnic_crq crq;
3d52b594 3853 int i, j;
9c4eaabd 3854 int rc;
032c5e82
TF		 3855
3856 memset(&crq, 0, sizeof(crq));
3857 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
3858 crq.request_statistics.cmd = REQUEST_STATISTICS;
3859 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
3860 crq.request_statistics.len =
3861 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 3862
3863 /* Wait for data to be written */
070eca95 3864 reinit_completion(&adapter->stats_done);
9c4eaabd
TF		 3865 rc = ibmvnic_send_crq(adapter, &crq);
3866 if (rc)
3867 return;
476d96ca
TF		 3868 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
3869 if (rc)
3870 return;
032c5e82
TF		 3871
3872 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
91dc5d25
LP		 3873 data[i] = be64_to_cpu(IBMVNIC_GET_STAT
3874 (adapter, ibmvnic_stats[i].offset));
3d52b594
JA		 3875
3876 for (j = 0; j < adapter->req_tx_queues; j++) {
2ee73c54
NC		 3877 data[i] = adapter->tx_stats_buffers[j].batched_packets;
3878 i++;
3879 data[i] = adapter->tx_stats_buffers[j].direct_packets;
3d52b594
JA		 3880 i++;
3881 data[i] = adapter->tx_stats_buffers[j].bytes;
3882 i++;
3883 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
3884 i++;
3885 }
3886
3887 for (j = 0; j < adapter->req_rx_queues; j++) {
3888 data[i] = adapter->rx_stats_buffers[j].packets;
3889 i++;
3890 data[i] = adapter->rx_stats_buffers[j].bytes;
3891 i++;
3892 data[i] = adapter->rx_stats_buffers[j].interrupts;
3893 i++;
3894 }
032c5e82
TF		 3895}
3896
3897static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 3898 .get_drvinfo = ibmvnic_get_drvinfo,
3899 .get_msglevel = ibmvnic_get_msglevel,
3900 .set_msglevel = ibmvnic_set_msglevel,
3901 .get_link = ibmvnic_get_link,
3902 .get_ringparam = ibmvnic_get_ringparam,
c26eba03 3903 .set_ringparam = ibmvnic_set_ringparam,
c2dbeb67 3904 .get_channels = ibmvnic_get_channels,
c26eba03 3905 .set_channels = ibmvnic_set_channels,
032c5e82
TF		 3906 .get_strings = ibmvnic_get_strings,
3907 .get_sset_count = ibmvnic_get_sset_count,
3908 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 3909 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 3910};
3911
3912/* Routines for managing CRQs/sCRQs */
3913
57a49436
NF		 3914static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
3915 struct ibmvnic_sub_crq_queue *scrq)
3916{
3917 int rc;
3918
9281cf2d 3919 if (!scrq) {
862aecbd 3920 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n");
9281cf2d
DM		 3921 return -EINVAL;
3922 }
3923
57a49436
NF		 3924 if (scrq->irq) {
3925 free_irq(scrq->irq, scrq);
3926 irq_dispose_mapping(scrq->irq);
3927 scrq->irq = 0;
3928 }
3929
9281cf2d
DM		 3930 if (scrq->msgs) {
3931 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
3932 atomic_set(&scrq->used, 0);
3933 scrq->cur = 0;
55fd59b0 3934 scrq->ind_buf.index = 0;
9281cf2d
DM		 3935 } else {
3936 netdev_dbg(adapter->netdev, "Invalid scrq reset\n");
3937 return -EINVAL;
3938 }
57a49436
NF		 3939
3940 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3941 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3942 return rc;
3943}
3944
3945static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
3946{
3947 int i, rc;
3948
a0faaa27
LP		 3949 if (!adapter->tx_scrq || !adapter->rx_scrq)
3950 return -EINVAL;
3951
44fbc1b6
NC		 3952 ibmvnic_clean_affinity(adapter);
3953
57a49436 3954 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 3955 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
57a49436
NF		 3956 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
3957 if (rc)
3958 return rc;
3959 }
3960
3961 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 3962 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
57a49436
NF		 3963 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
3964 if (rc)
3965 return rc;
3966 }
3967
57a49436
NF		 3968 return rc;
3969}
3970
032c5e82 3971static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
d7c0ef36
NF		 3972 struct ibmvnic_sub_crq_queue *scrq,
3973 bool do_h_free)
032c5e82
TF		 3974{
3975 struct device *dev = &adapter->vdev->dev;
3976 long rc;
3977
3978 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
3979
d7c0ef36
NF		 3980 if (do_h_free) {
3981 /* Close the sub-crqs */
3982 do {
3983 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3984 adapter->vdev->unit_address,
3985 scrq->crq_num);
3986 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
032c5e82 3987
d7c0ef36
NF		 3988 if (rc) {
3989 netdev_err(adapter->netdev,
3990 "Failed to release sub-CRQ %16lx, rc = %ld\n",
3991 scrq->crq_num, rc);
3992 }
ffa73855
TF		 3993 }
3994
f019fb63
TF		 3995 dma_free_coherent(dev,
3996 IBMVNIC_IND_ARR_SZ,
3997 scrq->ind_buf.indir_arr,
3998 scrq->ind_buf.indir_dma);
3999
032c5e82
TF		 4000 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
4001 DMA_BIDIRECTIONAL);
4002 free_pages((unsigned long)scrq->msgs, 2);
44fbc1b6 4003 free_cpumask_var(scrq->affinity_mask);
032c5e82
TF		 4004 kfree(scrq);
4005}
4006
4007static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
4008 *adapter)
4009{
4010 struct device *dev = &adapter->vdev->dev;
4011 struct ibmvnic_sub_crq_queue *scrq;
4012 int rc;
4013
1bb3c739 4014 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 4015 if (!scrq)
4016 return NULL;
4017
7f7adc50 4018 scrq->msgs =
1bb3c739 4019 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 4020 if (!scrq->msgs) {
4021 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
4022 goto zero_page_failed;
4023 }
44fbc1b6
NC		 4024 if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL))
4025 goto cpumask_alloc_failed;
032c5e82
TF		 4026
4027 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
4028 DMA_BIDIRECTIONAL);
4029 if (dma_mapping_error(dev, scrq->msg_token)) {
4030 dev_warn(dev, "Couldn't map crq queue messages page\n");
4031 goto map_failed;
4032 }
4033
4034 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
4035 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
4036
4037 if (rc == H_RESOURCE)
4038 rc = ibmvnic_reset_crq(adapter);
4039
4040 if (rc == H_CLOSED) {
4041 dev_warn(dev, "Partner adapter not ready, waiting.\n");
4042 } else if (rc) {
4043 dev_warn(dev, "Error %d registering sub-crq\n", rc);
4044 goto reg_failed;
4045 }
4046
032c5e82
TF		 4047 scrq->adapter = adapter;
4048 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
f019fb63
TF		 4049 scrq->ind_buf.index = 0;
4050
4051 scrq->ind_buf.indir_arr =
4052 dma_alloc_coherent(dev,
4053 IBMVNIC_IND_ARR_SZ,
4054 &scrq->ind_buf.indir_dma,
4055 GFP_KERNEL);
4056
4057 if (!scrq->ind_buf.indir_arr)
4058 goto indir_failed;
4059
032c5e82
TF		 4060 spin_lock_init(&scrq->lock);
4061
4062 netdev_dbg(adapter->netdev,
4063 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
4064 scrq->crq_num, scrq->hw_irq, scrq->irq);
4065
4066 return scrq;
4067
f019fb63
TF		 4068indir_failed:
4069 do {
4070 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
4071 adapter->vdev->unit_address,
4072 scrq->crq_num);
4073 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc));
032c5e82
TF		 4074reg_failed:
4075 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
4076 DMA_BIDIRECTIONAL);
4077map_failed:
44fbc1b6
NC		 4078 free_cpumask_var(scrq->affinity_mask);
4079cpumask_alloc_failed:
032c5e82
TF		 4080 free_pages((unsigned long)scrq->msgs, 2);
4081zero_page_failed:
4082 kfree(scrq);
4083
4084 return NULL;
4085}
4086
d7c0ef36 4087static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
032c5e82
TF		 4088{
4089 int i;
4090
44fbc1b6 4091 ibmvnic_clean_affinity(adapter);
032c5e82 4092 if (adapter->tx_scrq) {
82e3be32 4093 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
b510888f
NF		 4094 if (!adapter->tx_scrq[i])
4095 continue;
4096
d1cf33d9
NF		 4097 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
4098 i);
65d6470d 4099 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]);
b510888f 4100 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 4101 free_irq(adapter->tx_scrq[i]->irq,
4102 adapter->tx_scrq[i]);
88eb98a0 4103 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 4104 adapter->tx_scrq[i]->irq = 0;
032c5e82 4105 }
b510888f 4106
d7c0ef36
NF		 4107 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
4108 do_h_free);
b510888f
NF		 4109 }
4110
9501df3c 4111 kfree(adapter->tx_scrq);
032c5e82 4112 adapter->tx_scrq = NULL;
82e3be32 4113 adapter->num_active_tx_scrqs = 0;
032c5e82
TF		 4114 }
4115
49bbeb57
NC		 4116 /* Clean any remaining outstanding SKBs
4117 * we freed the irq so we won't be hearing
4118 * from them
4119 */
4120 clean_tx_pools(adapter);
4121
032c5e82 4122 if (adapter->rx_scrq) {
82e3be32 4123 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
b510888f
NF		 4124 if (!adapter->rx_scrq[i])
4125 continue;
4126
d1cf33d9
NF		 4127 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
4128 i);
b510888f 4129 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 4130 free_irq(adapter->rx_scrq[i]->irq,
4131 adapter->rx_scrq[i]);
88eb98a0 4132 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 4133 adapter->rx_scrq[i]->irq = 0;
032c5e82 4134 }
032c5e82 4135
d7c0ef36
NF		 4136 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
4137 do_h_free);
b510888f 4138 }
ea22d51a 4139
b510888f 4140 kfree(adapter->rx_scrq);
ea22d51a 4141 adapter->rx_scrq = NULL;
82e3be32 4142 adapter->num_active_rx_scrqs = 0;
ea22d51a 4143 }
ea22d51a
TF		 4144}
4145
032c5e82
TF		 4146static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
4147 struct ibmvnic_sub_crq_queue *scrq)
4148{
4149 struct device *dev = &adapter->vdev->dev;
4150 unsigned long rc;
4151
4152 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4153 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
4154 if (rc)
4155 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
4156 scrq->hw_irq, rc);
4157 return rc;
4158}
4159
7ea0c16a
CLG		 4160/* We can not use the IRQ chip EOI handler because that has the
4161 * unintended effect of changing the interrupt priority.
4162 */
4163static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq)
4164{
4165 u64 val = 0xff000000 | scrq->hw_irq;
4166 unsigned long rc;
4167
4168 rc = plpar_hcall_norets(H_EOI, val);
4169 if (rc)
4170 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc);
4171}
4172
4173/* Due to a firmware bug, the hypervisor can send an interrupt to a
4174 * transmit or receive queue just prior to a partition migration.
4175 * Force an EOI after migration.
4176 */
4177static void ibmvnic_clear_pending_interrupt(struct device *dev,
4178 struct ibmvnic_sub_crq_queue *scrq)
4179{
4180 if (!xive_enabled())
4181 ibmvnic_xics_eoi(dev, scrq);
4182}
4183
032c5e82
TF		 4184static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
4185 struct ibmvnic_sub_crq_queue *scrq)
4186{
4187 struct device *dev = &adapter->vdev->dev;
4188 unsigned long rc;
4189
4190 if (scrq->hw_irq > 0x100000000ULL) {
4191 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
4192 return 1;
4193 }
4194
7ed5b31f 4195 if (test_bit(0, &adapter->resetting) &&
73f9d364 4196 adapter->reset_reason == VNIC_RESET_MOBILITY) {
7ea0c16a 4197 ibmvnic_clear_pending_interrupt(dev, scrq);
73f9d364 4198 }
f23e0643 4199
032c5e82
TF		 4200 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4201 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
4202 if (rc)
4203 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
4204 scrq->hw_irq, rc);
4205 return rc;
4206}
4207
4208static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
4209 struct ibmvnic_sub_crq_queue *scrq)
4210{
4211 struct device *dev = &adapter->vdev->dev;
1c33e292 4212 int num_packets = 0, total_bytes = 0;
06b3e357 4213 struct ibmvnic_tx_pool *tx_pool;
032c5e82 4214 struct ibmvnic_tx_buff *txbuff;
0d973388 4215 struct netdev_queue *txq;
032c5e82 4216 union sub_crq *next;
1c33e292 4217 int index, i;
032c5e82
TF		 4218
4219restart_loop:
4220 while (pending_scrq(adapter, scrq)) {
4221 unsigned int pool = scrq->pool_index;
ffc385b9 4222 int num_entries = 0;
032c5e82
TF		 4223 next = ibmvnic_next_scrq(adapter, scrq);
4224 for (i = 0; i < next->tx_comp.num_comps; i++) {
032c5e82 4225 index = be32_to_cpu(next->tx_comp.correlators[i]);
06b3e357
TF		 4226 if (index & IBMVNIC_TSO_POOL_MASK) {
4227 tx_pool = &adapter->tso_pool[pool];
4228 index &= ~IBMVNIC_TSO_POOL_MASK;
4229 } else {
4230 tx_pool = &adapter->tx_pool[pool];
4231 }
4232
4233 txbuff = &tx_pool->tx_buff[index];
0d973388
TF		 4234 num_packets++;
4235 num_entries += txbuff->num_entries;
4236 if (txbuff->skb) {
4237 total_bytes += txbuff->skb->len;
ca09bf7b
LP		 4238 if (next->tx_comp.rcs[i]) {
4239 dev_err(dev, "tx error %x\n",
4240 next->tx_comp.rcs[i]);
4241 dev_kfree_skb_irq(txbuff->skb);
4242 } else {
4243 dev_consume_skb_irq(txbuff->skb);
4244 }
7c3e7de3 4245 txbuff->skb = NULL;
0d973388
TF		 4246 } else {
4247 netdev_warn(adapter->netdev,
4248 "TX completion received with NULL socket buffer\n");
142c0ac4 4249 }
06b3e357
TF		 4250 tx_pool->free_map[tx_pool->producer_index] = index;
4251 tx_pool->producer_index =
4252 (tx_pool->producer_index + 1) %
4253 tx_pool->num_buffers;
032c5e82
TF		 4254 }
4255 /* remove tx_comp scrq*/
4256 next->tx_comp.first = 0;
7c3e7de3 4257
0d973388 4258
ffc385b9 4259 if (atomic_sub_return(num_entries, &scrq->used) <=
7c3e7de3
NF		 4260 (adapter->req_tx_entries_per_subcrq / 2) &&
4261 __netif_subqueue_stopped(adapter->netdev,
4262 scrq->pool_index)) {
4219196d
SB		 4263 rcu_read_lock();
4264 if (adapter->tx_queues_active) {
4265 netif_wake_subqueue(adapter->netdev,
4266 scrq->pool_index);
4267 netdev_dbg(adapter->netdev,
4268 "Started queue %d\n",
4269 scrq->pool_index);
4270 }
4271 rcu_read_unlock();
7c3e7de3 4272 }
032c5e82
TF		 4273 }
4274
4275 enable_scrq_irq(adapter, scrq);
4276
4277 if (pending_scrq(adapter, scrq)) {
4278 disable_scrq_irq(adapter, scrq);
4279 goto restart_loop;
4280 }
4281
1c33e292
NC		 4282 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index);
4283 netdev_tx_completed_queue(txq, num_packets, total_bytes);
4284
032c5e82
TF		 4285 return 0;
4286}
4287
4288static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
4289{
4290 struct ibmvnic_sub_crq_queue *scrq = instance;
4291 struct ibmvnic_adapter *adapter = scrq->adapter;
4292
4293 disable_scrq_irq(adapter, scrq);
4294 ibmvnic_complete_tx(adapter, scrq);
4295
4296 return IRQ_HANDLED;
4297}
4298
4299static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
4300{
4301 struct ibmvnic_sub_crq_queue *scrq = instance;
4302 struct ibmvnic_adapter *adapter = scrq->adapter;
4303
09fb35ea
NF		 4304 /* When booting a kdump kernel we can hit pending interrupts
4305 * prior to completing driver initialization.
4306 */
4307 if (unlikely(adapter->state != VNIC_OPEN))
4308 return IRQ_NONE;
4309
3d52b594
JA		 4310 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
4311
032c5e82
TF		 4312 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
4313 disable_scrq_irq(adapter, scrq);
4314 __napi_schedule(&adapter->napi[scrq->scrq_num]);
4315 }
4316
4317 return IRQ_HANDLED;
4318}
4319
ea22d51a
TF		 4320static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
4321{
4322 struct device *dev = &adapter->vdev->dev;
4323 struct ibmvnic_sub_crq_queue *scrq;
4324 int i = 0, j = 0;
4325 int rc = 0;
4326
4327 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9
NF		 4328 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
4329 i);
ea22d51a
TF		 4330 scrq = adapter->tx_scrq[i];
4331 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
4332
99c1790e 4333 if (!scrq->irq) {
ea22d51a
TF		 4334 rc = -EINVAL;
4335 dev_err(dev, "Error mapping irq\n");
4336 goto req_tx_irq_failed;
4337 }
4338
e56e2515
MFV		 4339 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
4340 adapter->vdev->unit_address, i);
ea22d51a 4341 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
e56e2515 4342 0, scrq->name, scrq);
ea22d51a
TF		 4343
4344 if (rc) {
4345 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
4346 scrq->irq, rc);
4347 irq_dispose_mapping(scrq->irq);
af9090c2 4348 goto req_tx_irq_failed;
ea22d51a
TF		 4349 }
4350 }
4351
4352 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 4353 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
4354 i);
ea22d51a
TF		 4355 scrq = adapter->rx_scrq[i];
4356 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 4357 if (!scrq->irq) {
ea22d51a
TF		 4358 rc = -EINVAL;
4359 dev_err(dev, "Error mapping irq\n");
4360 goto req_rx_irq_failed;
4361 }
e56e2515
MFV		 4362 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
4363 adapter->vdev->unit_address, i);
ea22d51a 4364 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
e56e2515 4365 0, scrq->name, scrq);
ea22d51a
TF		 4366 if (rc) {
4367 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
4368 scrq->irq, rc);
4369 irq_dispose_mapping(scrq->irq);
4370 goto req_rx_irq_failed;
4371 }
4372 }
44fbc1b6
NC		 4373
4374 cpus_read_lock();
4375 ibmvnic_set_affinity(adapter);
4376 cpus_read_unlock();
4377
ea22d51a
TF		 4378 return rc;
4379
4380req_rx_irq_failed:
8bf371e6 4381 for (j = 0; j < i; j++) {
ea22d51a
TF		 4382 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
4383 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 4384 }
ea22d51a
TF		 4385 i = adapter->req_tx_queues;
4386req_tx_irq_failed:
8bf371e6 4387 for (j = 0; j < i; j++) {
ea22d51a 4388 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
27a2145d 4389 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
8bf371e6 4390 }
d7c0ef36 4391 release_sub_crqs(adapter, 1);
ea22d51a
TF		 4392 return rc;
4393}
4394
d346b9bc 4395static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4396{
4397 struct device *dev = &adapter->vdev->dev;
4398 struct ibmvnic_sub_crq_queue **allqueues;
4399 int registered_queues = 0;
032c5e82
TF		 4400 int total_queues;
4401 int more = 0;
ea22d51a 4402 int i;
032c5e82 4403
032c5e82
TF		 4404 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
4405
1bb3c739 4406 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 4407 if (!allqueues)
b6ee566c 4408 return -ENOMEM;
032c5e82
TF		 4409
4410 for (i = 0; i < total_queues; i++) {
4411 allqueues[i] = init_sub_crq_queue(adapter);
4412 if (!allqueues[i]) {
4413 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
4414 break;
4415 }
4416 registered_queues++;
4417 }
4418
4419 /* Make sure we were able to register the minimum number of queues */
4420 if (registered_queues <
4421 adapter->min_tx_queues + adapter->min_rx_queues) {
4422 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
4423 goto tx_failed;
4424 }
4425
4426 /* Distribute the failed allocated queues*/
4427 for (i = 0; i < total_queues - registered_queues + more ; i++) {
4428 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
4429 switch (i % 3) {
4430 case 0:
4431 if (adapter->req_rx_queues > adapter->min_rx_queues)
4432 adapter->req_rx_queues--;
4433 else
4434 more++;
4435 break;
4436 case 1:
4437 if (adapter->req_tx_queues > adapter->min_tx_queues)
4438 adapter->req_tx_queues--;
4439 else
4440 more++;
4441 break;
4442 }
4443 }
4444
4445 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 4446 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 4447 if (!adapter->tx_scrq)
4448 goto tx_failed;
4449
4450 for (i = 0; i < adapter->req_tx_queues; i++) {
4451 adapter->tx_scrq[i] = allqueues[i];
4452 adapter->tx_scrq[i]->pool_index = i;
82e3be32 4453 adapter->num_active_tx_scrqs++;
032c5e82
TF		 4454 }
4455
4456 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 4457 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 4458 if (!adapter->rx_scrq)
4459 goto rx_failed;
4460
4461 for (i = 0; i < adapter->req_rx_queues; i++) {
4462 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
4463 adapter->rx_scrq[i]->scrq_num = i;
82e3be32 4464 adapter->num_active_rx_scrqs++;
032c5e82
TF		 4465 }
4466
d346b9bc
NF		 4467 kfree(allqueues);
4468 return 0;
4469
4470rx_failed:
4471 kfree(adapter->tx_scrq);
4472 adapter->tx_scrq = NULL;
4473tx_failed:
4474 for (i = 0; i < registered_queues; i++)
d7c0ef36 4475 release_sub_crq_queue(adapter, allqueues[i], 1);
d346b9bc 4476 kfree(allqueues);
b6ee566c 4477 return -ENOMEM;
d346b9bc
NF		 4478}
4479
09081b9d 4480static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
d346b9bc
NF		 4481{
4482 struct device *dev = &adapter->vdev->dev;
4483 union ibmvnic_crq crq;
c26eba03 4484 int max_entries;
151b6a5c
SB		 4485 int cap_reqs;
4486
4487 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on
4488 * the PROMISC flag). Initialize this count upfront. When the tasklet
4489 * receives a response to all of these, it will send the next protocol
4490 * message (QUERY_IP_OFFLOAD).
4491 */
4492 if (!(adapter->netdev->flags & IFF_PROMISC) ||
4493 adapter->promisc_supported)
4494 cap_reqs = 7;
4495 else
4496 cap_reqs = 6;
d346b9bc
NF		 4497
4498 if (!retry) {
4499 /* Sub-CRQ entries are 32 byte long */
4500 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
4501
151b6a5c
SB		 4502 atomic_set(&adapter->running_cap_crqs, cap_reqs);
4503
d346b9bc
NF		 4504 if (adapter->min_tx_entries_per_subcrq > entries_page ||
4505 adapter->min_rx_add_entries_per_subcrq > entries_page) {
4506 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
4507 return;
4508 }
4509
c26eba03
JA		 4510 if (adapter->desired.mtu)
4511 adapter->req_mtu = adapter->desired.mtu;
4512 else
4513 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
4514
4515 if (!adapter->desired.tx_entries)
4516 adapter->desired.tx_entries =
4517 adapter->max_tx_entries_per_subcrq;
4518 if (!adapter->desired.rx_entries)
4519 adapter->desired.rx_entries =
4520 adapter->max_rx_add_entries_per_subcrq;
4521
a75de820 4522 max_entries = IBMVNIC_LTB_SET_SIZE /
c26eba03
JA		 4523 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
4524
4525 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
a75de820 4526 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) {
c26eba03
JA		 4527 adapter->desired.tx_entries = max_entries;
4528 }
d346b9bc 4529
c26eba03 4530 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
a75de820 4531 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) {
c26eba03
JA		 4532 adapter->desired.rx_entries = max_entries;
4533 }
4534
4535 if (adapter->desired.tx_entries)
4536 adapter->req_tx_entries_per_subcrq =
4537 adapter->desired.tx_entries;
4538 else
4539 adapter->req_tx_entries_per_subcrq =
4540 adapter->max_tx_entries_per_subcrq;
4541
4542 if (adapter->desired.rx_entries)
4543 adapter->req_rx_add_entries_per_subcrq =
4544 adapter->desired.rx_entries;
4545 else
4546 adapter->req_rx_add_entries_per_subcrq =
4547 adapter->max_rx_add_entries_per_subcrq;
4548
4549 if (adapter->desired.tx_queues)
4550 adapter->req_tx_queues =
4551 adapter->desired.tx_queues;
4552 else
4553 adapter->req_tx_queues =
4554 adapter->opt_tx_comp_sub_queues;
4555
4556 if (adapter->desired.rx_queues)
4557 adapter->req_rx_queues =
4558 adapter->desired.rx_queues;
4559 else
4560 adapter->req_rx_queues =
4561 adapter->opt_rx_comp_queues;
4562
4563 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
151b6a5c
SB		 4564 } else {
4565 atomic_add(cap_reqs, &adapter->running_cap_crqs);
d346b9bc 4566 }
032c5e82
TF		 4567 memset(&crq, 0, sizeof(crq));
4568 crq.request_capability.first = IBMVNIC_CRQ_CMD;
4569 crq.request_capability.cmd = REQUEST_CAPABILITY;
4570
4571 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 4572 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
151b6a5c 4573 cap_reqs--;
032c5e82
TF		 4574 ibmvnic_send_crq(adapter, &crq);
4575
4576 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 4577 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
151b6a5c 4578 cap_reqs--;
032c5e82
TF		 4579 ibmvnic_send_crq(adapter, &crq);
4580
4581 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 4582 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
151b6a5c 4583 cap_reqs--;
032c5e82
TF		 4584 ibmvnic_send_crq(adapter, &crq);
4585
4586 crq.request_capability.capability =
4587 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
4588 crq.request_capability.number =
de89e854 4589 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
151b6a5c 4590 cap_reqs--;
032c5e82
TF		 4591 ibmvnic_send_crq(adapter, &crq);
4592
4593 crq.request_capability.capability =
4594 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
4595 crq.request_capability.number =
de89e854 4596 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
151b6a5c 4597 cap_reqs--;
032c5e82
TF		 4598 ibmvnic_send_crq(adapter, &crq);
4599
4600 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 4601 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
151b6a5c 4602 cap_reqs--;
032c5e82
TF		 4603 ibmvnic_send_crq(adapter, &crq);
4604
4605 if (adapter->netdev->flags & IFF_PROMISC) {
4606 if (adapter->promisc_supported) {
4607 crq.request_capability.capability =
4608 cpu_to_be16(PROMISC_REQUESTED);
de89e854 4609 crq.request_capability.number = cpu_to_be64(1);
151b6a5c 4610 cap_reqs--;
032c5e82
TF		 4611 ibmvnic_send_crq(adapter, &crq);
4612 }
4613 } else {
4614 crq.request_capability.capability =
4615 cpu_to_be16(PROMISC_REQUESTED);
de89e854 4616 crq.request_capability.number = cpu_to_be64(0);
151b6a5c 4617 cap_reqs--;
032c5e82
TF		 4618 ibmvnic_send_crq(adapter, &crq);
4619 }
151b6a5c
SB		 4620
4621 /* Keep at end to catch any discrepancy between expected and actual
4622 * CRQs sent.
4623 */
4624 WARN_ON(cap_reqs != 0);
032c5e82
TF		 4625}
4626
4627static int pending_scrq(struct ibmvnic_adapter *adapter,
4628 struct ibmvnic_sub_crq_queue *scrq)
4629{
4630 union sub_crq *entry = &scrq->msgs[scrq->cur];
665ab1eb 4631 int rc;
032c5e82 4632
665ab1eb
LP		 4633 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP);
4634
4635 /* Ensure that the SCRQ valid flag is loaded prior to loading the
4636 * contents of the SCRQ descriptor
4637 */
4638 dma_rmb();
4639
4640 return rc;
032c5e82
TF		 4641}
4642
4643static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
4644 struct ibmvnic_sub_crq_queue *scrq)
4645{
4646 union sub_crq *entry;
4647 unsigned long flags;
4648
4649 spin_lock_irqsave(&scrq->lock, flags);
4650 entry = &scrq->msgs[scrq->cur];
4651 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
4652 if (++scrq->cur == scrq->size)
4653 scrq->cur = 0;
4654 } else {
4655 entry = NULL;
4656 }
4657 spin_unlock_irqrestore(&scrq->lock, flags);
4658
665ab1eb
LP		 4659 /* Ensure that the SCRQ valid flag is loaded prior to loading the
4660 * contents of the SCRQ descriptor
b71ec952
TF		 4661 */
4662 dma_rmb();
4663
032c5e82
TF		 4664 return entry;
4665}
4666
4667static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
4668{
4669 struct ibmvnic_crq_queue *queue = &adapter->crq;
4670 union ibmvnic_crq *crq;
4671
4672 crq = &queue->msgs[queue->cur];
4673 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
4674 if (++queue->cur == queue->size)
4675 queue->cur = 0;
4676 } else {
4677 crq = NULL;
4678 }
4679
4680 return crq;
4681}
4682
2d14d379
TF		 4683static void print_subcrq_error(struct device *dev, int rc, const char *func)
4684{
4685 switch (rc) {
4686 case H_PARAMETER:
4687 dev_warn_ratelimited(dev,
4688 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
4689 func, rc);
4690 break;
4691 case H_CLOSED:
4692 dev_warn_ratelimited(dev,
4693 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
4694 func, rc);
4695 break;
4696 default:
4697 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
4698 break;
4699 }
4700}
4701
ad7775dc
TF		 4702static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
4703 u64 remote_handle, u64 ioba, u64 num_entries)
4704{
4705 unsigned int ua = adapter->vdev->unit_address;
4706 struct device *dev = &adapter->vdev->dev;
4707 int rc;
4708
4709 /* Make sure the hypervisor sees the complete request */
1a42156f 4710 dma_wmb();
ad7775dc
TF		 4711 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
4712 cpu_to_be64(remote_handle),
4713 ioba, num_entries);
4714
2d14d379
TF		 4715 if (rc)
4716 print_subcrq_error(dev, rc, __func__);
ad7775dc
TF		 4717
4718 return rc;
4719}
4720
032c5e82
TF		 4721static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
4722 union ibmvnic_crq *crq)
4723{
4724 unsigned int ua = adapter->vdev->unit_address;
4725 struct device *dev = &adapter->vdev->dev;
4726 u64 *u64_crq = (u64 *)crq;
4727 int rc;
4728
4729 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
429aa364
LP		 4730 (unsigned long)cpu_to_be64(u64_crq[0]),
4731 (unsigned long)cpu_to_be64(u64_crq[1]));
032c5e82 4732
5153698e
TF		 4733 if (!adapter->crq.active &&
4734 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
4735 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
4736 return -EINVAL;
4737 }
4738
032c5e82 4739 /* Make sure the hypervisor sees the complete request */
1a42156f 4740 dma_wmb();
032c5e82
TF		 4741
4742 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
4743 cpu_to_be64(u64_crq[0]),
4744 cpu_to_be64(u64_crq[1]));
4745
4746 if (rc) {
ec95dffa 4747 if (rc == H_CLOSED) {
032c5e82 4748 dev_warn(dev, "CRQ Queue closed\n");
fa68bfab 4749 /* do not reset, report the fail, wait for passive init from server */
ec95dffa
NF		 4750 }
4751
032c5e82
TF		 4752 dev_warn(dev, "Send error (rc=%d)\n", rc);
4753 }
4754
4755 return rc;
4756}
4757
4758static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
4759{
36a782fd 4760 struct device *dev = &adapter->vdev->dev;
032c5e82 4761 union ibmvnic_crq crq;
36a782fd
TF		 4762 int retries = 100;
4763 int rc;
032c5e82
TF		 4764
4765 memset(&crq, 0, sizeof(crq));
4766 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
4767 crq.generic.cmd = IBMVNIC_CRQ_INIT;
4768 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
4769
36a782fd
TF		 4770 do {
4771 rc = ibmvnic_send_crq(adapter, &crq);
4772 if (rc != H_CLOSED)
4773 break;
4774 retries--;
4775 msleep(50);
4776
4777 } while (retries > 0);
4778
4779 if (rc) {
4780 dev_err(dev, "Failed to send init request, rc = %d\n", rc);
4781 return rc;
4782 }
4783
4784 return 0;
032c5e82
TF		 4785}
4786
37798d02
NF		 4787struct vnic_login_client_data {
4788 u8 type;
4789 __be16 len;
08ea556e 4790 char name[];
37798d02
NF		 4791} __packed;
4792
4793static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
4794{
4795 int len;
4796
4797 /* Calculate the amount of buffer space needed for the
4798 * vnic client data in the login buffer. There are four entries,
4799 * OS name, LPAR name, device name, and a null last entry.
4800 */
4801 len = 4 * sizeof(struct vnic_login_client_data);
4802 len += 6; /* "Linux" plus NULL */
4803 len += strlen(utsname()->nodename) + 1;
4804 len += strlen(adapter->netdev->name) + 1;
4805
4806 return len;
4807}
4808
4809static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
4810 struct vnic_login_client_data *vlcd)
4811{
4812 const char *os_name = "Linux";
4813 int len;
4814
4815 /* Type 1 - LPAR OS */
4816 vlcd->type = 1;
4817 len = strlen(os_name) + 1;
4818 vlcd->len = cpu_to_be16(len);
ef2c3dda 4819 strscpy(vlcd->name, os_name, len);
08ea556e 4820 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
37798d02
NF		 4821
4822 /* Type 2 - LPAR name */
4823 vlcd->type = 2;
4824 len = strlen(utsname()->nodename) + 1;
4825 vlcd->len = cpu_to_be16(len);
ef2c3dda 4826 strscpy(vlcd->name, utsname()->nodename, len);
08ea556e 4827 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
37798d02
NF		 4828
4829 /* Type 3 - device name */
4830 vlcd->type = 3;
4831 len = strlen(adapter->netdev->name) + 1;
4832 vlcd->len = cpu_to_be16(len);
ef2c3dda 4833 strscpy(vlcd->name, adapter->netdev->name, len);
37798d02
NF		 4834}
4835
d93a6caa
NC		 4836static void ibmvnic_print_hex_dump(struct net_device *dev, void *buf,
4837 size_t len)
4838{
4839 unsigned char hex_str[16 * 3];
4840
4841 for (size_t i = 0; i < len; i += 16) {
4842 hex_dump_to_buffer((unsigned char *)buf + i, len - i, 16, 8,
4843 hex_str, sizeof(hex_str), false);
4844 netdev_dbg(dev, "%s\n", hex_str);
4845 }
4846}
4847
20a8ab74 4848static int send_login(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4849{
4850 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
4851 struct ibmvnic_login_buffer *login_buffer;
032c5e82 4852 struct device *dev = &adapter->vdev->dev;
c98d9cc4 4853 struct vnic_login_client_data *vlcd;
032c5e82
TF		 4854 dma_addr_t rsp_buffer_token;
4855 dma_addr_t buffer_token;
4856 size_t rsp_buffer_size;
4857 union ibmvnic_crq crq;
c98d9cc4 4858 int client_data_len;
032c5e82
TF		 4859 size_t buffer_size;
4860 __be64 *tx_list_p;
4861 __be64 *rx_list_p;
c98d9cc4 4862 int rc;
032c5e82
TF		 4863 int i;
4864
20a8ab74
TF		 4865 if (!adapter->tx_scrq || !adapter->rx_scrq) {
4866 netdev_err(adapter->netdev,
4867 "RX or TX queues are not allocated, device login failed\n");
b6ee566c 4868 return -ENOMEM;
20a8ab74
TF		 4869 }
4870
a0c8be56 4871 release_login_buffer(adapter);
34f0f4e3 4872 release_login_rsp_buffer(adapter);
a0c8be56 4873
37798d02
NF		 4874 client_data_len = vnic_client_data_len(adapter);
4875
032c5e82
TF		 4876 buffer_size =
4877 sizeof(struct ibmvnic_login_buffer) +
37798d02
NF		 4878 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
4879 client_data_len;
032c5e82 4880
37798d02 4881 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
032c5e82
TF		 4882 if (!login_buffer)
4883 goto buf_alloc_failed;
4884
4885 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
4886 DMA_TO_DEVICE);
4887 if (dma_mapping_error(dev, buffer_token)) {
4888 dev_err(dev, "Couldn't map login buffer\n");
4889 goto buf_map_failed;
4890 }
4891
498cd8e4
JA		 4892 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
4893 sizeof(u64) * adapter->req_tx_queues +
4894 sizeof(u64) * adapter->req_rx_queues +
4895 sizeof(u64) * adapter->req_rx_queues +
4896 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 4897
4898 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
4899 if (!login_rsp_buffer)
4900 goto buf_rsp_alloc_failed;
4901
4902 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
4903 rsp_buffer_size, DMA_FROM_DEVICE);
4904 if (dma_mapping_error(dev, rsp_buffer_token)) {
4905 dev_err(dev, "Couldn't map login rsp buffer\n");
4906 goto buf_rsp_map_failed;
4907 }
661a2622 4908
032c5e82
TF		 4909 adapter->login_buf = login_buffer;
4910 adapter->login_buf_token = buffer_token;
4911 adapter->login_buf_sz = buffer_size;
4912 adapter->login_rsp_buf = login_rsp_buffer;
4913 adapter->login_rsp_buf_token = rsp_buffer_token;
4914 adapter->login_rsp_buf_sz = rsp_buffer_size;
4915
4916 login_buffer->len = cpu_to_be32(buffer_size);
4917 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
4918 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
4919 login_buffer->off_txcomp_subcrqs =
4920 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
4921 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
4922 login_buffer->off_rxcomp_subcrqs =
4923 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
4924 sizeof(u64) * adapter->req_tx_queues);
4925 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
4926 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
4927
4928 tx_list_p = (__be64 *)((char *)login_buffer +
4929 sizeof(struct ibmvnic_login_buffer));
4930 rx_list_p = (__be64 *)((char *)login_buffer +
4931 sizeof(struct ibmvnic_login_buffer) +
4932 sizeof(u64) * adapter->req_tx_queues);
4933
4934 for (i = 0; i < adapter->req_tx_queues; i++) {
4935 if (adapter->tx_scrq[i]) {
914789ac
LP		 4936 tx_list_p[i] =
4937 cpu_to_be64(adapter->tx_scrq[i]->crq_num);
032c5e82
TF		 4938 }
4939 }
4940
4941 for (i = 0; i < adapter->req_rx_queues; i++) {
4942 if (adapter->rx_scrq[i]) {
914789ac
LP		 4943 rx_list_p[i] =
4944 cpu_to_be64(adapter->rx_scrq[i]->crq_num);
032c5e82
TF		 4945 }
4946 }
4947
37798d02
NF		 4948 /* Insert vNIC login client data */
4949 vlcd = (struct vnic_login_client_data *)
4950 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
4951 login_buffer->client_data_offset =
4952 cpu_to_be32((char *)vlcd - (char *)login_buffer);
4953 login_buffer->client_data_len = cpu_to_be32(client_data_len);
4954
4955 vnic_add_client_data(adapter, vlcd);
4956
032c5e82 4957 netdev_dbg(adapter->netdev, "Login Buffer:\n");
d93a6caa
NC		 4958 ibmvnic_print_hex_dump(adapter->netdev, adapter->login_buf,
4959 adapter->login_buf_sz);
032c5e82
TF		 4960
4961 memset(&crq, 0, sizeof(crq));
4962 crq.login.first = IBMVNIC_CRQ_CMD;
4963 crq.login.cmd = LOGIN;
4964 crq.login.ioba = cpu_to_be32(buffer_token);
4965 crq.login.len = cpu_to_be32(buffer_size);
76cdc5c5
SB		 4966
4967 adapter->login_pending = true;
c98d9cc4
DM		 4968 rc = ibmvnic_send_crq(adapter, &crq);
4969 if (rc) {
4970 adapter->login_pending = false;
4971 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
411c565b 4972 goto buf_send_failed;
c98d9cc4 4973 }
032c5e82 4974
20a8ab74 4975 return 0;
032c5e82 4976
411c565b
NC		 4977buf_send_failed:
4978 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
4979 DMA_FROM_DEVICE);
032c5e82
TF		 4980buf_rsp_map_failed:
4981 kfree(login_rsp_buffer);
c98d9cc4 4982 adapter->login_rsp_buf = NULL;
032c5e82
TF		 4983buf_rsp_alloc_failed:
4984 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
4985buf_map_failed:
4986 kfree(login_buffer);
c98d9cc4 4987 adapter->login_buf = NULL;
032c5e82 4988buf_alloc_failed:
b6ee566c 4989 return -ENOMEM;
032c5e82
TF		 4990}
4991
9c4eaabd
TF		 4992static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
4993 u32 len, u8 map_id)
032c5e82
TF		 4994{
4995 union ibmvnic_crq crq;
4996
4997 memset(&crq, 0, sizeof(crq));
4998 crq.request_map.first = IBMVNIC_CRQ_CMD;
4999 crq.request_map.cmd = REQUEST_MAP;
5000 crq.request_map.map_id = map_id;
5001 crq.request_map.ioba = cpu_to_be32(addr);
5002 crq.request_map.len = cpu_to_be32(len);
9c4eaabd 5003 return ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 5004}
5005
9c4eaabd 5006static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
032c5e82
TF		 5007{
5008 union ibmvnic_crq crq;
5009
5010 memset(&crq, 0, sizeof(crq));
5011 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
5012 crq.request_unmap.cmd = REQUEST_UNMAP;
5013 crq.request_unmap.map_id = map_id;
9c4eaabd 5014 return ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 5015}
5016
69980d02 5017static void send_query_map(struct ibmvnic_adapter *adapter)
032c5e82
TF		 5018{
5019 union ibmvnic_crq crq;
5020
5021 memset(&crq, 0, sizeof(crq));
5022 crq.query_map.first = IBMVNIC_CRQ_CMD;
5023 crq.query_map.cmd = QUERY_MAP;
5024 ibmvnic_send_crq(adapter, &crq);
5025}
5026
5027/* Send a series of CRQs requesting various capabilities of the VNIC server */
491099ad 5028static void send_query_cap(struct ibmvnic_adapter *adapter)
032c5e82
TF		 5029{
5030 union ibmvnic_crq crq;
151b6a5c
SB		 5031 int cap_reqs;
5032
5033 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count
5034 * upfront. When the tasklet receives a response to all of these, it
5035 * can send out the next protocol messaage (REQUEST_CAPABILITY).
5036 */
5037 cap_reqs = 25;
5038
5039 atomic_set(&adapter->running_cap_crqs, cap_reqs);
032c5e82 5040
032c5e82
TF		 5041 memset(&crq, 0, sizeof(crq));
5042 crq.query_capability.first = IBMVNIC_CRQ_CMD;
5043 crq.query_capability.cmd = QUERY_CAPABILITY;
5044
5045 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
032c5e82 5046 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5047 cap_reqs--;
032c5e82
TF		 5048
5049 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
032c5e82 5050 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5051 cap_reqs--;
032c5e82
TF		 5052
5053 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
032c5e82 5054 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5055 cap_reqs--;
032c5e82
TF		 5056
5057 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
032c5e82 5058 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5059 cap_reqs--;
032c5e82
TF		 5060
5061 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
032c5e82 5062 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5063 cap_reqs--;
032c5e82
TF		 5064
5065 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
032c5e82 5066 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5067 cap_reqs--;
032c5e82
TF		 5068
5069 crq.query_capability.capability =
5070 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
032c5e82 5071 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5072 cap_reqs--;
032c5e82
TF		 5073
5074 crq.query_capability.capability =
5075 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
032c5e82 5076 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5077 cap_reqs--;
032c5e82
TF		 5078
5079 crq.query_capability.capability =
5080 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
032c5e82 5081 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5082 cap_reqs--;
032c5e82
TF		 5083
5084 crq.query_capability.capability =
5085 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
032c5e82 5086 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5087 cap_reqs--;
032c5e82
TF		 5088
5089 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
032c5e82 5090 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5091 cap_reqs--;
032c5e82
TF		 5092
5093 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
032c5e82 5094 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5095 cap_reqs--;
032c5e82
TF		 5096
5097 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
032c5e82 5098 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5099 cap_reqs--;
032c5e82
TF		 5100
5101 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
032c5e82 5102 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5103 cap_reqs--;
032c5e82
TF		 5104
5105 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
032c5e82 5106 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5107 cap_reqs--;
032c5e82
TF		 5108
5109 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
032c5e82 5110 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5111 cap_reqs--;
032c5e82 5112
6052d5e2 5113 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
6052d5e2 5114 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5115 cap_reqs--;
6052d5e2 5116
032c5e82 5117 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
032c5e82 5118 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5119 cap_reqs--;
032c5e82
TF		 5120
5121 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
032c5e82 5122 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5123 cap_reqs--;
032c5e82
TF		 5124
5125 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
032c5e82 5126 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5127 cap_reqs--;
032c5e82
TF		 5128
5129 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
032c5e82 5130 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5131 cap_reqs--;
032c5e82
TF		 5132
5133 crq.query_capability.capability =
5134 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
032c5e82 5135 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5136 cap_reqs--;
032c5e82
TF		 5137
5138 crq.query_capability.capability =
5139 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
032c5e82 5140 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5141 cap_reqs--;
032c5e82
TF		 5142
5143 crq.query_capability.capability =
5144 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
032c5e82 5145 ibmvnic_send_crq(adapter, &crq);
151b6a5c 5146 cap_reqs--;
032c5e82
TF		 5147
5148 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
151b6a5c 5149
032c5e82 5150 ibmvnic_send_crq(adapter, &crq);
151b6a5c
SB		 5151 cap_reqs--;
5152
5153 /* Keep at end to catch any discrepancy between expected and actual
5154 * CRQs sent.
5155 */
5156 WARN_ON(cap_reqs != 0);
032c5e82
TF		 5157}
5158
16e811fe
LP		 5159static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
5160{
5161 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
5162 struct device *dev = &adapter->vdev->dev;
5163 union ibmvnic_crq crq;
5164
5165 adapter->ip_offload_tok =
5166 dma_map_single(dev,
5167 &adapter->ip_offload_buf,
5168 buf_sz,
5169 DMA_FROM_DEVICE);
5170
5171 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
5172 if (!firmware_has_feature(FW_FEATURE_CMO))
5173 dev_err(dev, "Couldn't map offload buffer\n");
5174 return;
5175 }
5176
5177 memset(&crq, 0, sizeof(crq));
5178 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
5179 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
5180 crq.query_ip_offload.len = cpu_to_be32(buf_sz);
5181 crq.query_ip_offload.ioba =
5182 cpu_to_be32(adapter->ip_offload_tok);
5183
5184 ibmvnic_send_crq(adapter, &crq);
5185}
5186
46899bde
LP		 5187static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
5188{
5189 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
5190 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
5191 struct device *dev = &adapter->vdev->dev;
5192 netdev_features_t old_hw_features = 0;
5193 union ibmvnic_crq crq;
5194
5195 adapter->ip_offload_ctrl_tok =
5196 dma_map_single(dev,
5197 ctrl_buf,
5198 sizeof(adapter->ip_offload_ctrl),
5199 DMA_TO_DEVICE);
5200
5201 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
5202 dev_err(dev, "Couldn't map ip offload control buffer\n");
5203 return;
5204 }
5205
5206 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
5207 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
5208 ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
5209 ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
5210 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
5211 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
5212 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
5213 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
5214 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
5215 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
5216
5217 /* large_rx disabled for now, additional features needed */
5218 ctrl_buf->large_rx_ipv4 = 0;
5219 ctrl_buf->large_rx_ipv6 = 0;
5220
5221 if (adapter->state != VNIC_PROBING) {
5222 old_hw_features = adapter->netdev->hw_features;
5223 adapter->netdev->hw_features = 0;
5224 }
5225
5226 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
5227
5228 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
5229 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
5230
5231 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
5232 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
5233
5234 if ((adapter->netdev->features &
5235 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
5236 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
5237
5238 if (buf->large_tx_ipv4)
5239 adapter->netdev->hw_features |= NETIF_F_TSO;
5240 if (buf->large_tx_ipv6)
5241 adapter->netdev->hw_features |= NETIF_F_TSO6;
5242
5243 if (adapter->state == VNIC_PROBING) {
5244 adapter->netdev->features |= adapter->netdev->hw_features;
5245 } else if (old_hw_features != adapter->netdev->hw_features) {
5246 netdev_features_t tmp = 0;
5247
5248 /* disable features no longer supported */
5249 adapter->netdev->features &= adapter->netdev->hw_features;
5250 /* turn on features now supported if previously enabled */
5251 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
5252 adapter->netdev->hw_features;
5253 adapter->netdev->features |=
5254 tmp & adapter->netdev->wanted_features;
5255 }
5256
5257 memset(&crq, 0, sizeof(crq));
5258 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
5259 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
5260 crq.control_ip_offload.len =
5261 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
5262 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
5263 ibmvnic_send_crq(adapter, &crq);
5264}
5265
4e6759be
DANR		 5266static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
5267 struct ibmvnic_adapter *adapter)
5268{
5269 struct device *dev = &adapter->vdev->dev;
5270
5271 if (crq->get_vpd_size_rsp.rc.code) {
5272 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
5273 crq->get_vpd_size_rsp.rc.code);
5274 complete(&adapter->fw_done);
5275 return;
5276 }
5277
5278 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
5279 complete(&adapter->fw_done);
5280}
5281
5282static void handle_vpd_rsp(union ibmvnic_crq *crq,
5283 struct ibmvnic_adapter *adapter)
5284{
5285 struct device *dev = &adapter->vdev->dev;
21a2545b 5286 unsigned char *substr = NULL;
4e6759be
DANR		 5287 u8 fw_level_len = 0;
5288
5289 memset(adapter->fw_version, 0, 32);
5290
5291 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
5292 DMA_FROM_DEVICE);
5293
5294 if (crq->get_vpd_rsp.rc.code) {
5295 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
5296 crq->get_vpd_rsp.rc.code);
5297 goto complete;
5298 }
5299
5300 /* get the position of the firmware version info
5301 * located after the ASCII 'RM' substring in the buffer
5302 */
5303 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
5304 if (!substr) {
a107311d 5305 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4e6759be
DANR		 5306 goto complete;
5307 }
5308
5309 /* get length of firmware level ASCII substring */
5310 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
5311 fw_level_len = *(substr + 2);
5312 } else {
5313 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
5314 goto complete;
5315 }
5316
5317 /* copy firmware version string from vpd into adapter */
5318 if ((substr + 3 + fw_level_len) <
5319 (adapter->vpd->buff + adapter->vpd->len)) {
431acee0
JS		 5320 strscpy(adapter->fw_version, substr + 3,
5321 sizeof(adapter->fw_version));
4e6759be
DANR		 5322 } else {
5323 dev_info(dev, "FW substr extrapolated VPD buff\n");
5324 }
5325
5326complete:
21a2545b 5327 if (adapter->fw_version[0] == '\0')
0b217d3d 5328 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version));
4e6759be
DANR		 5329 complete(&adapter->fw_done);
5330}
5331
032c5e82
TF		 5332static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
5333{
5334 struct device *dev = &adapter->vdev->dev;
5335 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
032c5e82
TF		 5336
5337 dma_unmap_single(dev, adapter->ip_offload_tok,
5338 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
5339
5340 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
d93a6caa
NC		 5341 ibmvnic_print_hex_dump(adapter->netdev, buf,
5342 sizeof(adapter->ip_offload_buf));
032c5e82
TF		 5343
5344 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
5345 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
5346 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
5347 buf->tcp_ipv4_chksum);
5348 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
5349 buf->tcp_ipv6_chksum);
5350 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
5351 buf->udp_ipv4_chksum);
5352 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
5353 buf->udp_ipv6_chksum);
5354 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
5355 buf->large_tx_ipv4);
5356 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
5357 buf->large_tx_ipv6);
5358 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
5359 buf->large_rx_ipv4);
5360 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
5361 buf->large_rx_ipv6);
5362 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
5363 buf->max_ipv4_header_size);
5364 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
5365 buf->max_ipv6_header_size);
5366 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
5367 buf->max_tcp_header_size);
5368 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
5369 buf->max_udp_header_size);
5370 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
5371 buf->max_large_tx_size);
5372 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
5373 buf->max_large_rx_size);
5374 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
5375 buf->ipv6_extension_header);
5376 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
5377 buf->tcp_pseudosum_req);
5378 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
5379 buf->num_ipv6_ext_headers);
5380 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
5381 buf->off_ipv6_ext_headers);
5382
46899bde 5383 send_control_ip_offload(adapter);
032c5e82
TF		 5384}
5385
c9008d33
TF		 5386static const char *ibmvnic_fw_err_cause(u16 cause)
5387{
5388 switch (cause) {
5389 case ADAPTER_PROBLEM:
5390 return "adapter problem";
5391 case BUS_PROBLEM:
5392 return "bus problem";
5393 case FW_PROBLEM:
5394 return "firmware problem";
5395 case DD_PROBLEM:
5396 return "device driver problem";
5397 case EEH_RECOVERY:
5398 return "EEH recovery";
5399 case FW_UPDATED:
5400 return "firmware updated";
5401 case LOW_MEMORY:
5402 return "low Memory";
5403 default:
5404 return "unknown";
5405 }
5406}
5407
2f9de9ba
NF		 5408static void handle_error_indication(union ibmvnic_crq *crq,
5409 struct ibmvnic_adapter *adapter)
5410{
5411 struct device *dev = &adapter->vdev->dev;
c9008d33
TF		 5412 u16 cause;
5413
5414 cause = be16_to_cpu(crq->error_indication.error_cause);
2f9de9ba 5415
c9008d33
TF		 5416 dev_warn_ratelimited(dev,
5417 "Firmware reports %serror, cause: %s. Starting recovery...\n",
5418 crq->error_indication.flags
5419 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
5420 ibmvnic_fw_err_cause(cause));
2f9de9ba 5421
ed651a10
NF		 5422 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
5423 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 5424 else
5425 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 5426}
5427
f813614f
TF		 5428static int handle_change_mac_rsp(union ibmvnic_crq *crq,
5429 struct ibmvnic_adapter *adapter)
032c5e82
TF		 5430{
5431 struct net_device *netdev = adapter->netdev;
5432 struct device *dev = &adapter->vdev->dev;
5433 long rc;
5434
5435 rc = crq->change_mac_addr_rsp.rc.code;
5436 if (rc) {
5437 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
f813614f 5438 goto out;
032c5e82 5439 }
d9b0e599
LP		 5440 /* crq->change_mac_addr.mac_addr is the requested one
5441 * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
5442 */
f3956ebb 5443 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]);
d9b0e599
LP		 5444 ether_addr_copy(adapter->mac_addr,
5445 &crq->change_mac_addr_rsp.mac_addr[0]);
f813614f
TF		 5446out:
5447 complete(&adapter->fw_done);
5448 return rc;
032c5e82
TF		 5449}
5450
5451static void handle_request_cap_rsp(union ibmvnic_crq *crq,
5452 struct ibmvnic_adapter *adapter)
5453{
5454 struct device *dev = &adapter->vdev->dev;
5455 u64 *req_value;
5456 char *name;
5457
901e040a 5458 atomic_dec(&adapter->running_cap_crqs);
151b6a5c
SB		 5459 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n",
5460 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 5461 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
5462 case REQ_TX_QUEUES:
5463 req_value = &adapter->req_tx_queues;
5464 name = "tx";
5465 break;
5466 case REQ_RX_QUEUES:
5467 req_value = &adapter->req_rx_queues;
5468 name = "rx";
5469 break;
5470 case REQ_RX_ADD_QUEUES:
5471 req_value = &adapter->req_rx_add_queues;
5472 name = "rx_add";
5473 break;
5474 case REQ_TX_ENTRIES_PER_SUBCRQ:
5475 req_value = &adapter->req_tx_entries_per_subcrq;
5476 name = "tx_entries_per_subcrq";
5477 break;
5478 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
5479 req_value = &adapter->req_rx_add_entries_per_subcrq;
5480 name = "rx_add_entries_per_subcrq";
5481 break;
5482 case REQ_MTU:
5483 req_value = &adapter->req_mtu;
5484 name = "mtu";
5485 break;
5486 case PROMISC_REQUESTED:
5487 req_value = &adapter->promisc;
5488 name = "promisc";
5489 break;
5490 default:
5491 dev_err(dev, "Got invalid cap request rsp %d\n",
5492 crq->request_capability.capability);
5493 return;
5494 }
5495
5496 switch (crq->request_capability_rsp.rc.code) {
5497 case SUCCESS:
5498 break;
5499 case PARTIALSUCCESS:
5500 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
5501 *req_value,
914789ac
LP		 5502 (long)be64_to_cpu(crq->request_capability_rsp.number),
5503 name);
e7913803
JA		 5504
5505 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
5506 REQ_MTU) {
5507 pr_err("mtu of %llu is not supported. Reverting.\n",
5508 *req_value);
5509 *req_value = adapter->fallback.mtu;
5510 } else {
5511 *req_value =
5512 be64_to_cpu(crq->request_capability_rsp.number);
5513 }
5514
09081b9d 5515 send_request_cap(adapter, 1);
032c5e82
TF		 5516 return;
5517 default:
5518 dev_err(dev, "Error %d in request cap rsp\n",
5519 crq->request_capability_rsp.rc.code);
5520 return;
5521 }
5522
5523 /* Done receiving requested capabilities, query IP offload support */
3a5d9db7 5524 if (atomic_read(&adapter->running_cap_crqs) == 0)
16e811fe 5525 send_query_ip_offload(adapter);
032c5e82
TF		 5526}
5527
5528static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
5529 struct ibmvnic_adapter *adapter)
5530{
5531 struct device *dev = &adapter->vdev->dev;
c26eba03 5532 struct net_device *netdev = adapter->netdev;
032c5e82
TF		 5533 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
5534 struct ibmvnic_login_buffer *login = adapter->login_buf;
f3ae59c0
CF		 5535 u64 *tx_handle_array;
5536 u64 *rx_handle_array;
5537 int num_tx_pools;
5538 int num_rx_pools;
507ebe64 5539 u64 *size_array;
db17ba71 5540 u32 rsp_len;
032c5e82
TF		 5541 int i;
5542
76cdc5c5
SB		 5543 /* CHECK: Test/set of login_pending does not need to be atomic
5544 * because only ibmvnic_tasklet tests/clears this.
5545 */
5546 if (!adapter->login_pending) {
5547 netdev_warn(netdev, "Ignoring unexpected login response\n");
5548 return 0;
5549 }
5550 adapter->login_pending = false;
5551
498cd8e4
JA		 5552 /* If the number of queues requested can't be allocated by the
5553 * server, the login response will return with code 1. We will need
5554 * to resend the login buffer with fewer queues requested.
5555 */
5556 if (login_rsp_crq->generic.rc.code) {
64d92aa2 5557 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
498cd8e4
JA		 5558 complete(&adapter->init_done);
5559 return 0;
5560 }
5561
d437f5aa
SB		 5562 if (adapter->failover_pending) {
5563 adapter->init_done_rc = -EAGAIN;
5564 netdev_dbg(netdev, "Failover pending, ignoring login response\n");
273c29e9
SB		 5565 complete(&adapter->init_done);
5566 /* login response buffer will be released on reset */
5567 return 0;
5568 }
5569
c26eba03
JA		 5570 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5571
032c5e82 5572 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
d93a6caa
NC		 5573 ibmvnic_print_hex_dump(netdev, adapter->login_rsp_buf,
5574 adapter->login_rsp_buf_sz);
032c5e82
TF		 5575
5576 /* Sanity checks */
5577 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
5578 (be32_to_cpu(login->num_rxcomp_subcrqs) *
5579 adapter->req_rx_add_queues !=
5580 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
5581 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
31d6b403 5582 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 5583 return -EIO;
5584 }
db17ba71
NC		 5585
5586 rsp_len = be32_to_cpu(login_rsp->len);
5587 if (be32_to_cpu(login->login_rsp_len) < rsp_len ||
5588 rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) ||
5589 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) ||
5590 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) ||
5591 rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) {
5592 /* This can happen if a login request times out and there are
5593 * 2 outstanding login requests sent, the LOGIN_RSP crq
5594 * could have been for the older login request. So we are
5595 * parsing the newer response buffer which may be incomplete
5596 */
5597 dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n");
5598 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
5599 return -EIO;
5600 }
5601
507ebe64
TF		 5602 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
5603 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
5604 /* variable buffer sizes are not supported, so just read the
5605 * first entry.
5606 */
5607 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
f3ae59c0
CF		 5608
5609 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
5610 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
5611
5612 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
5613 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
5614 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
5615 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
5616
5617 for (i = 0; i < num_tx_pools; i++)
5618 adapter->tx_scrq[i]->handle = tx_handle_array[i];
5619
5620 for (i = 0; i < num_rx_pools; i++)
5621 adapter->rx_scrq[i]->handle = rx_handle_array[i];
5622
507ebe64
TF		 5623 adapter->num_active_tx_scrqs = num_tx_pools;
5624 adapter->num_active_rx_scrqs = num_rx_pools;
f3ae59c0 5625 release_login_rsp_buffer(adapter);
a2c0f039 5626 release_login_buffer(adapter);
032c5e82
TF		 5627 complete(&adapter->init_done);
5628
032c5e82
TF		 5629 return 0;
5630}
5631
032c5e82
TF		 5632static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
5633 struct ibmvnic_adapter *adapter)
5634{
5635 struct device *dev = &adapter->vdev->dev;
5636 long rc;
5637
5638 rc = crq->request_unmap_rsp.rc.code;
5639 if (rc)
5640 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
5641}
5642
5643static void handle_query_map_rsp(union ibmvnic_crq *crq,
5644 struct ibmvnic_adapter *adapter)
5645{
5646 struct net_device *netdev = adapter->netdev;
5647 struct device *dev = &adapter->vdev->dev;
5648 long rc;
5649
5650 rc = crq->query_map_rsp.rc.code;
5651 if (rc) {
5652 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
5653 return;
5654 }
0f2bf318
SB		 5655 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n",
5656 crq->query_map_rsp.page_size,
5657 __be32_to_cpu(crq->query_map_rsp.tot_pages),
5658 __be32_to_cpu(crq->query_map_rsp.free_pages));
032c5e82
TF		 5659}
5660
5661static void handle_query_cap_rsp(union ibmvnic_crq *crq,
5662 struct ibmvnic_adapter *adapter)
5663{
5664 struct net_device *netdev = adapter->netdev;
5665 struct device *dev = &adapter->vdev->dev;
5666 long rc;
5667
901e040a 5668 atomic_dec(&adapter->running_cap_crqs);
032c5e82 5669 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 5670 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 5671 rc = crq->query_capability.rc.code;
5672 if (rc) {
5673 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
5674 goto out;
5675 }
5676
5677 switch (be16_to_cpu(crq->query_capability.capability)) {
5678 case MIN_TX_QUEUES:
5679 adapter->min_tx_queues =
de89e854 5680 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5681 netdev_dbg(netdev, "min_tx_queues = %lld\n",
5682 adapter->min_tx_queues);
5683 break;
5684 case MIN_RX_QUEUES:
5685 adapter->min_rx_queues =
de89e854 5686 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5687 netdev_dbg(netdev, "min_rx_queues = %lld\n",
5688 adapter->min_rx_queues);
5689 break;
5690 case MIN_RX_ADD_QUEUES:
5691 adapter->min_rx_add_queues =
de89e854 5692 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5693 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
5694 adapter->min_rx_add_queues);
5695 break;
5696 case MAX_TX_QUEUES:
5697 adapter->max_tx_queues =
de89e854 5698 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5699 netdev_dbg(netdev, "max_tx_queues = %lld\n",
5700 adapter->max_tx_queues);
5701 break;
5702 case MAX_RX_QUEUES:
5703 adapter->max_rx_queues =
de89e854 5704 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5705 netdev_dbg(netdev, "max_rx_queues = %lld\n",
5706 adapter->max_rx_queues);
5707 break;
5708 case MAX_RX_ADD_QUEUES:
5709 adapter->max_rx_add_queues =
de89e854 5710 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5711 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
5712 adapter->max_rx_add_queues);
5713 break;
5714 case MIN_TX_ENTRIES_PER_SUBCRQ:
5715 adapter->min_tx_entries_per_subcrq =
de89e854 5716 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5717 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
5718 adapter->min_tx_entries_per_subcrq);
5719 break;
5720 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
5721 adapter->min_rx_add_entries_per_subcrq =
de89e854 5722 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5723 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
5724 adapter->min_rx_add_entries_per_subcrq);
5725 break;
5726 case MAX_TX_ENTRIES_PER_SUBCRQ:
5727 adapter->max_tx_entries_per_subcrq =
de89e854 5728 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5729 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
5730 adapter->max_tx_entries_per_subcrq);
5731 break;
5732 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
5733 adapter->max_rx_add_entries_per_subcrq =
de89e854 5734 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5735 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
5736 adapter->max_rx_add_entries_per_subcrq);
5737 break;
5738 case TCP_IP_OFFLOAD:
5739 adapter->tcp_ip_offload =
de89e854 5740 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5741 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
5742 adapter->tcp_ip_offload);
5743 break;
5744 case PROMISC_SUPPORTED:
5745 adapter->promisc_supported =
de89e854 5746 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5747 netdev_dbg(netdev, "promisc_supported = %lld\n",
5748 adapter->promisc_supported);
5749 break;
5750 case MIN_MTU:
de89e854 5751 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 5752 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 5753 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
5754 break;
5755 case MAX_MTU:
de89e854 5756 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 5757 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 5758 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
5759 break;
5760 case MAX_MULTICAST_FILTERS:
5761 adapter->max_multicast_filters =
de89e854 5762 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5763 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
5764 adapter->max_multicast_filters);
5765 break;
5766 case VLAN_HEADER_INSERTION:
5767 adapter->vlan_header_insertion =
de89e854 5768 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5769 if (adapter->vlan_header_insertion)
5770 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
5771 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
5772 adapter->vlan_header_insertion);
5773 break;
6052d5e2
MFV		 5774 case RX_VLAN_HEADER_INSERTION:
5775 adapter->rx_vlan_header_insertion =
5776 be64_to_cpu(crq->query_capability.number);
5777 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
5778 adapter->rx_vlan_header_insertion);
5779 break;
032c5e82
TF		 5780 case MAX_TX_SG_ENTRIES:
5781 adapter->max_tx_sg_entries =
de89e854 5782 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5783 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
5784 adapter->max_tx_sg_entries);
5785 break;
5786 case RX_SG_SUPPORTED:
5787 adapter->rx_sg_supported =
de89e854 5788 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5789 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
5790 adapter->rx_sg_supported);
5791 break;
5792 case OPT_TX_COMP_SUB_QUEUES:
5793 adapter->opt_tx_comp_sub_queues =
de89e854 5794 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5795 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
5796 adapter->opt_tx_comp_sub_queues);
5797 break;
5798 case OPT_RX_COMP_QUEUES:
5799 adapter->opt_rx_comp_queues =
de89e854 5800 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5801 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
5802 adapter->opt_rx_comp_queues);
5803 break;
5804 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
5805 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 5806 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5807 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
5808 adapter->opt_rx_bufadd_q_per_rx_comp_q);
5809 break;
5810 case OPT_TX_ENTRIES_PER_SUBCRQ:
5811 adapter->opt_tx_entries_per_subcrq =
de89e854 5812 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5813 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
5814 adapter->opt_tx_entries_per_subcrq);
5815 break;
5816 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
5817 adapter->opt_rxba_entries_per_subcrq =
de89e854 5818 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 5819 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
5820 adapter->opt_rxba_entries_per_subcrq);
5821 break;
5822 case TX_RX_DESC_REQ:
5823 adapter->tx_rx_desc_req = crq->query_capability.number;
5824 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
5825 adapter->tx_rx_desc_req);
5826 break;
5827
5828 default:
5829 netdev_err(netdev, "Got invalid cap rsp %d\n",
5830 crq->query_capability.capability);
5831 }
5832
5833out:
3a5d9db7 5834 if (atomic_read(&adapter->running_cap_crqs) == 0)
09081b9d 5835 send_request_cap(adapter, 0);
032c5e82
TF		 5836}
5837
f8d6ae0d
MFV		 5838static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
5839{
5840 union ibmvnic_crq crq;
5841 int rc;
5842
5843 memset(&crq, 0, sizeof(crq));
5844 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
5845 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
ff25dcb9
TF		 5846
5847 mutex_lock(&adapter->fw_lock);
5848 adapter->fw_done_rc = 0;
070eca95 5849 reinit_completion(&adapter->fw_done);
ff25dcb9 5850
f8d6ae0d 5851 rc = ibmvnic_send_crq(adapter, &crq);
ff25dcb9
TF		 5852 if (rc) {
5853 mutex_unlock(&adapter->fw_lock);
f8d6ae0d 5854 return rc;
ff25dcb9 5855 }
476d96ca
TF		 5856
5857 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
ff25dcb9
TF		 5858 if (rc) {
5859 mutex_unlock(&adapter->fw_lock);
476d96ca 5860 return rc;
ff25dcb9 5861 }
476d96ca 5862
ff25dcb9 5863 mutex_unlock(&adapter->fw_lock);
f8d6ae0d
MFV		 5864 return adapter->fw_done_rc ? -EIO : 0;
5865}
5866
5867static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
5868 struct ibmvnic_adapter *adapter)
5869{
5870 struct net_device *netdev = adapter->netdev;
5871 int rc;
dd0f9d89 5872 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
f8d6ae0d
MFV		 5873
5874 rc = crq->query_phys_parms_rsp.rc.code;
5875 if (rc) {
5876 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
5877 return rc;
5878 }
dd0f9d89 5879 switch (rspeed) {
f8d6ae0d
MFV		 5880 case IBMVNIC_10MBPS:
5881 adapter->speed = SPEED_10;
5882 break;
5883 case IBMVNIC_100MBPS:
5884 adapter->speed = SPEED_100;
5885 break;
5886 case IBMVNIC_1GBPS:
5887 adapter->speed = SPEED_1000;
5888 break;
b9cd795b 5889 case IBMVNIC_10GBPS:
f8d6ae0d
MFV		 5890 adapter->speed = SPEED_10000;
5891 break;
5892 case IBMVNIC_25GBPS:
5893 adapter->speed = SPEED_25000;
5894 break;
5895 case IBMVNIC_40GBPS:
5896 adapter->speed = SPEED_40000;
5897 break;
5898 case IBMVNIC_50GBPS:
5899 adapter->speed = SPEED_50000;
5900 break;
5901 case IBMVNIC_100GBPS:
5902 adapter->speed = SPEED_100000;
5903 break;
b9cd795b
LP		 5904 case IBMVNIC_200GBPS:
5905 adapter->speed = SPEED_200000;
5906 break;
f8d6ae0d 5907 default:
dd0f9d89
MFV		 5908 if (netif_carrier_ok(netdev))
5909 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
f8d6ae0d
MFV		 5910 adapter->speed = SPEED_UNKNOWN;
5911 }
5912 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
5913 adapter->duplex = DUPLEX_FULL;
5914 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
5915 adapter->duplex = DUPLEX_HALF;
5916 else
5917 adapter->duplex = DUPLEX_UNKNOWN;
5918
5919 return rc;
5920}
5921
032c5e82
TF		 5922static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
5923 struct ibmvnic_adapter *adapter)
5924{
5925 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
5926 struct net_device *netdev = adapter->netdev;
5927 struct device *dev = &adapter->vdev->dev;
993a82b0 5928 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 5929 long rc;
5930
5931 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
429aa364
LP		 5932 (unsigned long)cpu_to_be64(u64_crq[0]),
5933 (unsigned long)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 5934 switch (gen_crq->first) {
5935 case IBMVNIC_CRQ_INIT_RSP:
5936 switch (gen_crq->cmd) {
5937 case IBMVNIC_CRQ_INIT:
5938 dev_info(dev, "Partner initialized\n");
017892c1 5939 adapter->from_passive_init = true;
76cdc5c5
SB		 5940 /* Discard any stale login responses from prev reset.
5941 * CHECK: should we clear even on INIT_COMPLETE?
5942 */
5943 adapter->login_pending = false;
5944
53f8b1b2
CF		 5945 if (adapter->state == VNIC_DOWN)
5946 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT);
5947 else
5948 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
5949
ef66a1ea
SB		 5950 if (rc && rc != -EBUSY) {
5951 /* We were unable to schedule the failover
5952 * reset either because the adapter was still
5953 * probing (eg: during kexec) or we could not
5954 * allocate memory. Clear the failover_pending
5955 * flag since no one else will. We ignore
5956 * EBUSY because it means either FAILOVER reset
5957 * is already scheduled or the adapter is
5958 * being removed.
5959 */
5960 netdev_err(netdev,
5961 "Error %ld scheduling failover reset\n",
5962 rc);
5963 adapter->failover_pending = false;
5964 }
6b278c0c
SB		 5965
5966 if (!completion_done(&adapter->init_done)) {
6b278c0c
SB		 5967 if (!adapter->init_done_rc)
5968 adapter->init_done_rc = -EAGAIN;
765559b1 5969 complete(&adapter->init_done);
6b278c0c
SB		 5970 }
5971
032c5e82
TF		 5972 break;
5973 case IBMVNIC_CRQ_INIT_COMPLETE:
5974 dev_info(dev, "Partner initialization complete\n");
5153698e 5975 adapter->crq.active = true;
032c5e82
TF		 5976 send_version_xchg(adapter);
5977 break;
5978 default:
5979 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
5980 }
5981 return;
5982 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 5983 netif_carrier_off(netdev);
5153698e 5984 adapter->crq.active = false;
2147e3d0
TF		 5985 /* terminate any thread waiting for a response
5986 * from the device
5987 */
5988 if (!completion_done(&adapter->fw_done)) {
5989 adapter->fw_done_rc = -EIO;
5990 complete(&adapter->fw_done);
5991 }
36491f2d
SB		 5992
5993 /* if we got here during crq-init, retry crq-init */
5994 if (!completion_done(&adapter->init_done)) {
5995 adapter->init_done_rc = -EAGAIN;
5996 complete(&adapter->init_done);
5997 }
5998
2147e3d0
TF		 5999 if (!completion_done(&adapter->stats_done))
6000 complete(&adapter->stats_done);
7ed5b31f 6001 if (test_bit(0, &adapter->resetting))
2770a798 6002 adapter->force_reset_recovery = true;
032c5e82 6003 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 6004 dev_info(dev, "Migrated, re-enabling adapter\n");
6005 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 6006 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
6007 dev_info(dev, "Backing device failover detected\n");
5a18e1e0 6008 adapter->failover_pending = true;
032c5e82
TF		 6009 } else {
6010 /* The adapter lost the connection */
6011 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
6012 gen_crq->cmd);
ed651a10 6013 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 6014 }
6015 return;
6016 case IBMVNIC_CRQ_CMD_RSP:
6017 break;
6018 default:
6019 dev_err(dev, "Got an invalid msg type 0x%02x\n",
6020 gen_crq->first);
6021 return;
6022 }
6023
6024 switch (gen_crq->cmd) {
6025 case VERSION_EXCHANGE_RSP:
6026 rc = crq->version_exchange_rsp.rc.code;
6027 if (rc) {
6028 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
6029 break;
6030 }
78468899 6031 ibmvnic_version =
032c5e82 6032 be16_to_cpu(crq->version_exchange_rsp.version);
78468899
TF		 6033 dev_info(dev, "Partner protocol version is %d\n",
6034 ibmvnic_version);
491099ad 6035 send_query_cap(adapter);
032c5e82
TF		 6036 break;
6037 case QUERY_CAPABILITY_RSP:
6038 handle_query_cap_rsp(crq, adapter);
6039 break;
6040 case QUERY_MAP_RSP:
6041 handle_query_map_rsp(crq, adapter);
6042 break;
6043 case REQUEST_MAP_RSP:
f3be0cbc
TF		 6044 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
6045 complete(&adapter->fw_done);
032c5e82
TF		 6046 break;
6047 case REQUEST_UNMAP_RSP:
6048 handle_request_unmap_rsp(crq, adapter);
6049 break;
6050 case REQUEST_CAPABILITY_RSP:
6051 handle_request_cap_rsp(crq, adapter);
6052 break;
6053 case LOGIN_RSP:
6054 netdev_dbg(netdev, "Got Login Response\n");
6055 handle_login_rsp(crq, adapter);
6056 break;
6057 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 6058 netdev_dbg(netdev,
6059 "Got Logical Link State Response, state: %d rc: %d\n",
6060 crq->logical_link_state_rsp.link_state,
6061 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 6062 adapter->logical_link_state =
6063 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 6064 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
6065 complete(&adapter->init_done);
032c5e82
TF		 6066 break;
6067 case LINK_STATE_INDICATION:
6068 netdev_dbg(netdev, "Got Logical Link State Indication\n");
6069 adapter->phys_link_state =
6070 crq->link_state_indication.phys_link_state;
6071 adapter->logical_link_state =
6072 crq->link_state_indication.logical_link_state;
0655f994
TF		 6073 if (adapter->phys_link_state && adapter->logical_link_state)
6074 netif_carrier_on(netdev);
6075 else
6076 netif_carrier_off(netdev);
032c5e82
TF		 6077 break;
6078 case CHANGE_MAC_ADDR_RSP:
6079 netdev_dbg(netdev, "Got MAC address change Response\n");
f813614f 6080 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
032c5e82
TF		 6081 break;
6082 case ERROR_INDICATION:
6083 netdev_dbg(netdev, "Got Error Indication\n");
6084 handle_error_indication(crq, adapter);
6085 break;
032c5e82
TF		 6086 case REQUEST_STATISTICS_RSP:
6087 netdev_dbg(netdev, "Got Statistics Response\n");
6088 complete(&adapter->stats_done);
6089 break;
032c5e82
TF		 6090 case QUERY_IP_OFFLOAD_RSP:
6091 netdev_dbg(netdev, "Got Query IP offload Response\n");
6092 handle_query_ip_offload_rsp(adapter);
6093 break;
6094 case MULTICAST_CTRL_RSP:
6095 netdev_dbg(netdev, "Got multicast control Response\n");
6096 break;
6097 case CONTROL_IP_OFFLOAD_RSP:
6098 netdev_dbg(netdev, "Got Control IP offload Response\n");
6099 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
6100 sizeof(adapter->ip_offload_ctrl),
6101 DMA_TO_DEVICE);
bd0b6723 6102 complete(&adapter->init_done);
032c5e82 6103 break;
032c5e82
TF		 6104 case COLLECT_FW_TRACE_RSP:
6105 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
6106 complete(&adapter->fw_done);
6107 break;
4e6759be
DANR		 6108 case GET_VPD_SIZE_RSP:
6109 handle_vpd_size_rsp(crq, adapter);
6110 break;
6111 case GET_VPD_RSP:
6112 handle_vpd_rsp(crq, adapter);
6113 break;
f8d6ae0d
MFV		 6114 case QUERY_PHYS_PARMS_RSP:
6115 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
6116 complete(&adapter->fw_done);
6117 break;
032c5e82
TF		 6118 default:
6119 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
6120 gen_crq->cmd);
6121 }
6122}
6123
6124static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
6125{
6126 struct ibmvnic_adapter *adapter = instance;
6c267b3d 6127
6c267b3d 6128 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 6129 return IRQ_HANDLED;
6130}
6131
aa7c3fee 6132static void ibmvnic_tasklet(struct tasklet_struct *t)
6c267b3d 6133{
aa7c3fee 6134 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
032c5e82 6135 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 6136 union ibmvnic_crq *crq;
6137 unsigned long flags;
032c5e82
TF		 6138
6139 spin_lock_irqsave(&queue->lock, flags);
3a5d9db7
SB		 6140
6141 /* Pull all the valid messages off the CRQ */
6142 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
6143 /* This barrier makes sure ibmvnic_next_crq()'s
6144 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
6145 * before ibmvnic_handle_crq()'s
6146 * switch(gen_crq->first) and switch(gen_crq->cmd).
6147 */
6148 dma_rmb();
6149 ibmvnic_handle_crq(crq, adapter);
6150 crq->generic.first = 0;
032c5e82 6151 }
3a5d9db7 6152
032c5e82 6153 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 6154}
6155
6156static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
6157{
6158 struct vio_dev *vdev = adapter->vdev;
6159 int rc;
6160
6161 do {
6162 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
6163 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
6164
6165 if (rc)
6166 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
6167
6168 return rc;
6169}
6170
6171static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
6172{
6173 struct ibmvnic_crq_queue *crq = &adapter->crq;
6174 struct device *dev = &adapter->vdev->dev;
6175 struct vio_dev *vdev = adapter->vdev;
6176 int rc;
6177
6178 /* Close the CRQ */
6179 do {
6180 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
6181 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
6182
6183 /* Clean out the queue */
0e435bef
LP		 6184 if (!crq->msgs)
6185 return -EINVAL;
6186
032c5e82
TF		 6187 memset(crq->msgs, 0, PAGE_SIZE);
6188 crq->cur = 0;
5153698e 6189 crq->active = false;
032c5e82
TF		 6190
6191 /* And re-open it again */
6192 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
6193 crq->msg_token, PAGE_SIZE);
6194
6195 if (rc == H_CLOSED)
6196 /* Adapter is good, but other end is not ready */
6197 dev_warn(dev, "Partner adapter not ready\n");
6198 else if (rc != 0)
6199 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
6200
6201 return rc;
6202}
6203
f992887c 6204static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 6205{
6206 struct ibmvnic_crq_queue *crq = &adapter->crq;
6207 struct vio_dev *vdev = adapter->vdev;
6208 long rc;
6209
f992887c
NF		 6210 if (!crq->msgs)
6211 return;
6212
032c5e82
TF		 6213 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
6214 free_irq(vdev->irq, adapter);
6c267b3d 6215 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 6216 do {
6217 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
6218 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
6219
6220 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
6221 DMA_BIDIRECTIONAL);
6222 free_page((unsigned long)crq->msgs);
f992887c 6223 crq->msgs = NULL;
5153698e 6224 crq->active = false;
032c5e82
TF		 6225}
6226
f992887c 6227static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 6228{
6229 struct ibmvnic_crq_queue *crq = &adapter->crq;
6230 struct device *dev = &adapter->vdev->dev;
6231 struct vio_dev *vdev = adapter->vdev;
6232 int rc, retrc = -ENOMEM;
6233
f992887c
NF		 6234 if (crq->msgs)
6235 return 0;
6236
032c5e82
TF		 6237 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
6238 /* Should we allocate more than one page? */
6239
6240 if (!crq->msgs)
6241 return -ENOMEM;
6242
6243 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
6244 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
6245 DMA_BIDIRECTIONAL);
6246 if (dma_mapping_error(dev, crq->msg_token))
6247 goto map_failed;
6248
6249 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
6250 crq->msg_token, PAGE_SIZE);
6251
6252 if (rc == H_RESOURCE)
6253 /* maybe kexecing and resource is busy. try a reset */
6254 rc = ibmvnic_reset_crq(adapter);
6255 retrc = rc;
6256
6257 if (rc == H_CLOSED) {
6258 dev_warn(dev, "Partner adapter not ready\n");
6259 } else if (rc) {
6260 dev_warn(dev, "Error %d opening adapter\n", rc);
6261 goto reg_crq_failed;
6262 }
6263
6264 retrc = 0;
6265
aa7c3fee 6266 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
6c267b3d 6267
032c5e82 6268 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
e56e2515
MFV		 6269 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
6270 adapter->vdev->unit_address);
6271 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
032c5e82
TF		 6272 if (rc) {
6273 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
6274 vdev->irq, rc);
6275 goto req_irq_failed;
6276 }
6277
6278 rc = vio_enable_interrupts(vdev);
6279 if (rc) {
6280 dev_err(dev, "Error %d enabling interrupts\n", rc);
6281 goto req_irq_failed;
6282 }
6283
6284 crq->cur = 0;
6285 spin_lock_init(&crq->lock);
6286
6e20d001
SB		 6287 /* process any CRQs that were queued before we enabled interrupts */
6288 tasklet_schedule(&adapter->tasklet);
6289
032c5e82
TF		 6290 return retrc;
6291
6292req_irq_failed:
6c267b3d 6293 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 6294 do {
6295 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
6296 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
6297reg_crq_failed:
6298 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
6299map_failed:
6300 free_page((unsigned long)crq->msgs);
f992887c 6301 crq->msgs = NULL;
032c5e82
TF		 6302 return retrc;
6303}
6304
635e442f 6305static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
032c5e82 6306{
f6ef6408 6307 struct device *dev = &adapter->vdev->dev;
98c41f04 6308 unsigned long timeout = msecs_to_jiffies(20000);
6881b07f
MS		 6309 u64 old_num_rx_queues = adapter->req_rx_queues;
6310 u64 old_num_tx_queues = adapter->req_tx_queues;
f6ef6408
JA		 6311 int rc;
6312
017892c1
JA		 6313 adapter->from_passive_init = false;
6314
fa68bfab
LP		 6315 rc = ibmvnic_send_crq_init(adapter);
6316 if (rc) {
6317 dev_err(dev, "Send crq init failed with error %d\n", rc);
6318 return rc;
6319 }
6320
f6ef6408
JA		 6321 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
6322 dev_err(dev, "Initialization sequence timed out\n");
b6ee566c 6323 return -ETIMEDOUT;
017892c1
JA		 6324 }
6325
6a2fb0e9
NF		 6326 if (adapter->init_done_rc) {
6327 release_crq_queue(adapter);
ae16bf15 6328 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc);
6a2fb0e9
NF		 6329 return adapter->init_done_rc;
6330 }
6331
785a2b10
LP		 6332 if (adapter->from_passive_init) {
6333 adapter->state = VNIC_OPEN;
6334 adapter->from_passive_init = false;
ae16bf15 6335 dev_err(dev, "CRQ-init failed, passive-init\n");
b6ee566c 6336 return -EINVAL;
785a2b10
LP		 6337 }
6338
635e442f
LP		 6339 if (reset &&
6340 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
30f79625 6341 adapter->reset_reason != VNIC_RESET_MOBILITY) {
d7c0ef36
NF		 6342 if (adapter->req_rx_queues != old_num_rx_queues ||
6343 adapter->req_tx_queues != old_num_tx_queues) {
6344 release_sub_crqs(adapter, 0);
6345 rc = init_sub_crqs(adapter);
6346 } else {
1b18f09d
RL		 6347 /* no need to reinitialize completely, but we do
6348 * need to clean up transmits that were in flight
6349 * when we processed the reset. Failure to do so
6350 * will confound the upper layer, usually TCP, by
6351 * creating the illusion of transmits that are
6352 * awaiting completion.
6353 */
6354 clean_tx_pools(adapter);
6355
d7c0ef36
NF		 6356 rc = reset_sub_crq_queues(adapter);
6357 }
6358 } else {
57a49436 6359 rc = init_sub_crqs(adapter);
d7c0ef36
NF		 6360 }
6361
1bb3c739
NF		 6362 if (rc) {
6363 dev_err(dev, "Initialization of sub crqs failed\n");
6364 release_crq_queue(adapter);
5df969c3
TF		 6365 return rc;
6366 }
6367
6368 rc = init_sub_crq_irqs(adapter);
6369 if (rc) {
6370 dev_err(dev, "Failed to initialize sub crq irqs\n");
6371 release_crq_queue(adapter);
1bb3c739
NF		 6372 }
6373
6374 return rc;
f6ef6408
JA		 6375}
6376
40c9db8a
TF		 6377static struct device_attribute dev_attr_failover;
6378
f6ef6408
JA		 6379static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
6380{
032c5e82
TF		 6381 struct ibmvnic_adapter *adapter;
6382 struct net_device *netdev;
6383 unsigned char *mac_addr_p;
fd98693c 6384 unsigned long flags;
53f8b1b2 6385 bool init_success;
032c5e82
TF		 6386 int rc;
6387
6388 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
6389 dev->unit_address);
6390
6391 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
6392 VETH_MAC_ADDR, NULL);
6393 if (!mac_addr_p) {
6394 dev_err(&dev->dev,
6395 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
6396 __FILE__, __LINE__);
6397 return 0;
6398 }
6399
6400 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
d45cc3a4 6401 IBMVNIC_MAX_QUEUES);
032c5e82
TF		 6402 if (!netdev)
6403 return -ENOMEM;
6404
6405 adapter = netdev_priv(netdev);
90c8014c 6406 adapter->state = VNIC_PROBING;
032c5e82
TF		 6407 dev_set_drvdata(&dev->dev, netdev);
6408 adapter->vdev = dev;
6409 adapter->netdev = netdev;
76cdc5c5 6410 adapter->login_pending = false;
129854f0
SB		 6411 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids));
6412 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */
6413 bitmap_set(adapter->map_ids, 0, 1);
032c5e82
TF		 6414
6415 ether_addr_copy(adapter->mac_addr, mac_addr_p);
f3956ebb 6416 eth_hw_addr_set(netdev, adapter->mac_addr);
032c5e82
TF		 6417 netdev->irq = dev->irq;
6418 netdev->netdev_ops = &ibmvnic_netdev_ops;
6419 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
6420 SET_NETDEV_DEV(netdev, &dev->dev);
6421
ed651a10 6422 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
7ed5b31f
JK		 6423 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
6424 __ibmvnic_delayed_reset);
ed651a10 6425 INIT_LIST_HEAD(&adapter->rwi_list);
6c5c7489 6426 spin_lock_init(&adapter->rwi_lock);
7d7195a0 6427 spin_lock_init(&adapter->state_lock);
ff25dcb9 6428 mutex_init(&adapter->fw_lock);
fd98693c 6429 init_completion(&adapter->probe_done);
bbd669a8 6430 init_completion(&adapter->init_done);
070eca95
TF		 6431 init_completion(&adapter->fw_done);
6432 init_completion(&adapter->reset_done);
6433 init_completion(&adapter->stats_done);
7ed5b31f 6434 clear_bit(0, &adapter->resetting);
489de956 6435 adapter->prev_rx_buf_sz = 0;
bbd80930 6436 adapter->prev_mtu = 0;
ed651a10 6437
53f8b1b2 6438 init_success = false;
6a2fb0e9 6439 do {
ae16bf15
SB		 6440 reinit_init_done(adapter);
6441
f628ad53
SB		 6442 /* clear any failovers we got in the previous pass
6443 * since we are reinitializing the CRQ
6444 */
6445 adapter->failover_pending = false;
6446
fd98693c
SB		 6447 /* If we had already initialized CRQ, we may have one or
6448 * more resets queued already. Discard those and release
6449 * the CRQ before initializing the CRQ again.
6450 */
6451 release_crq_queue(adapter);
6452
6453 /* Since we are still in PROBING state, __ibmvnic_reset()
6454 * will not access the ->rwi_list and since we released CRQ,
6455 * we won't get _new_ transport events. But there maybe an
6456 * ongoing ibmvnic_reset() call. So serialize access to
6457 * rwi_list. If we win the race, ibvmnic_reset() could add
6458 * a reset after we purged but thats ok - we just may end
6459 * up with an extra reset (i.e similar to having two or more
6460 * resets in the queue at once).
6461 * CHECK.
6462 */
6463 spin_lock_irqsave(&adapter->rwi_lock, flags);
6464 flush_reset_queue(adapter);
6465 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
6466
30f79625
NF		 6467 rc = init_crq_queue(adapter);
6468 if (rc) {
6469 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
6470 rc);
6471 goto ibmvnic_init_fail;
6472 }
6473
635e442f 6474 rc = ibmvnic_reset_init(adapter, false);
6b278c0c 6475 } while (rc == -EAGAIN);
032c5e82 6476
53f8b1b2
CF		 6477 /* We are ignoring the error from ibmvnic_reset_init() assuming that the
6478 * partner is not ready. CRQ is not active. When the partner becomes
6479 * ready, we will do the passive init reset.
6480 */
6481
6482 if (!rc)
6483 init_success = true;
6484
07184213
TF		 6485 rc = init_stats_buffers(adapter);
6486 if (rc)
6487 goto ibmvnic_init_fail;
6488
6489 rc = init_stats_token(adapter);
6490 if (rc)
6491 goto ibmvnic_stats_fail;
6492
40c9db8a 6493 rc = device_create_file(&dev->dev, &dev_attr_failover);
7c1885ae 6494 if (rc)
07184213 6495 goto ibmvnic_dev_file_err;
40c9db8a 6496
e876a8a7 6497 netif_carrier_off(netdev);
032c5e82 6498
53f8b1b2
CF		 6499 if (init_success) {
6500 adapter->state = VNIC_PROBED;
6501 netdev->mtu = adapter->req_mtu - ETH_HLEN;
6502 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
6503 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
6504 } else {
6505 adapter->state = VNIC_DOWN;
6506 }
c26eba03
JA		 6507
6508 adapter->wait_for_reset = false;
a86d5c68 6509 adapter->last_reset_time = jiffies;
570425f8
SB		 6510
6511 rc = register_netdev(netdev);
6512 if (rc) {
6513 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
6514 goto ibmvnic_register_fail;
6515 }
6516 dev_info(&dev->dev, "ibmvnic registered\n");
6517
92125c3a
NC		 6518 rc = ibmvnic_cpu_notif_add(adapter);
6519 if (rc) {
6520 netdev_err(netdev, "Registering cpu notifier failed\n");
6521 goto cpu_notif_add_failed;
6522 }
6523
fd98693c
SB		 6524 complete(&adapter->probe_done);
6525
032c5e82 6526 return 0;
7c1885ae 6527
92125c3a
NC		 6528cpu_notif_add_failed:
6529 unregister_netdev(netdev);
6530
7c1885ae
NF		 6531ibmvnic_register_fail:
6532 device_remove_file(&dev->dev, &dev_attr_failover);
6533
07184213
TF		 6534ibmvnic_dev_file_err:
6535 release_stats_token(adapter);
6536
6537ibmvnic_stats_fail:
6538 release_stats_buffers(adapter);
6539
7c1885ae 6540ibmvnic_init_fail:
d7c0ef36 6541 release_sub_crqs(adapter, 1);
7c1885ae 6542 release_crq_queue(adapter);
fd98693c
SB		 6543
6544 /* cleanup worker thread after releasing CRQ so we don't get
6545 * transport events (i.e new work items for the worker thread).
6546 */
6547 adapter->state = VNIC_REMOVING;
6548 complete(&adapter->probe_done);
6549 flush_work(&adapter->ibmvnic_reset);
6550 flush_delayed_work(&adapter->ibmvnic_delayed_reset);
6551
6552 flush_reset_queue(adapter);
6553
ff25dcb9 6554 mutex_destroy(&adapter->fw_lock);
7c1885ae
NF		 6555 free_netdev(netdev);
6556
6557 return rc;
032c5e82
TF		 6558}
6559
386a966f 6560static void ibmvnic_remove(struct vio_dev *dev)
032c5e82
TF		 6561{
6562 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 6563 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
7d7195a0
JK		 6564 unsigned long flags;
6565
6566 spin_lock_irqsave(&adapter->state_lock, flags);
4a41c421
SB		 6567
6568 /* If ibmvnic_reset() is scheduling a reset, wait for it to
6569 * finish. Then, set the state to REMOVING to prevent it from
6570 * scheduling any more work and to have reset functions ignore
6571 * any resets that have already been scheduled. Drop the lock
6572 * after setting state, so __ibmvnic_reset() which is called
6573 * from the flush_work() below, can make progress.
6574 */
69cdb794 6575 spin_lock(&adapter->rwi_lock);
90c8014c 6576 adapter->state = VNIC_REMOVING;
69cdb794 6577 spin_unlock(&adapter->rwi_lock);
4a41c421 6578
7d7195a0
JK		 6579 spin_unlock_irqrestore(&adapter->state_lock, flags);
6580
92125c3a
NC		 6581 ibmvnic_cpu_notif_remove(adapter);
6582
6954a9e4
TF		 6583 flush_work(&adapter->ibmvnic_reset);
6584 flush_delayed_work(&adapter->ibmvnic_delayed_reset);
6585
a5681e20
JK		 6586 rtnl_lock();
6587 unregister_netdevice(netdev);
37489055
NF		 6588
6589 release_resources(adapter);
489de956 6590 release_rx_pools(adapter);
bbd80930 6591 release_tx_pools(adapter);
d7c0ef36 6592 release_sub_crqs(adapter, 1);
37489055
NF		 6593 release_crq_queue(adapter);
6594
53cc7721
TF		 6595 release_stats_token(adapter);
6596 release_stats_buffers(adapter);
6597
90c8014c
NF		 6598 adapter->state = VNIC_REMOVED;
6599
a5681e20 6600 rtnl_unlock();
ff25dcb9 6601 mutex_destroy(&adapter->fw_lock);
40c9db8a 6602 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 6603 free_netdev(netdev);
6604 dev_set_drvdata(&dev->dev, NULL);
032c5e82
TF		 6605}
6606
40c9db8a
TF		 6607static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
6608 const char *buf, size_t count)
6609{
6610 struct net_device *netdev = dev_get_drvdata(dev);
6611 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
6612 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
6613 __be64 session_token;
6614 long rc;
6615
6616 if (!sysfs_streq(buf, "1"))
6617 return -EINVAL;
6618
6619 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
6620 H_GET_SESSION_TOKEN, 0, 0, 0);
6621 if (rc) {
6622 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
6623 rc);
334c4241 6624 goto last_resort;
40c9db8a
TF		 6625 }
6626
6627 session_token = (__be64)retbuf[0];
6628 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
6629 be64_to_cpu(session_token));
6630 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
6631 H_SESSION_ERR_DETECTED, session_token, 0, 0);
277f2bb1 6632 if (rc) {
334c4241
LP		 6633 netdev_err(netdev,
6634 "H_VIOCTL initiated failover failed, rc %ld\n",
40c9db8a 6635 rc);
277f2bb1
SB		 6636 goto last_resort;
6637 }
6638
6639 return count;
334c4241
LP		 6640
6641last_resort:
6642 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n");
6643 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
40c9db8a
TF		 6644
6645 return count;
6646}
6cbaefb4 6647static DEVICE_ATTR_WO(failover);
40c9db8a 6648
032c5e82
TF		 6649static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
6650{
6651 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
6652 struct ibmvnic_adapter *adapter;
6653 struct iommu_table *tbl;
6654 unsigned long ret = 0;
6655 int i;
6656
6657 tbl = get_iommu_table_base(&vdev->dev);
6658
6659 /* netdev inits at probe time along with the structures we need below*/
6660 if (!netdev)
6661 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
6662
6663 adapter = netdev_priv(netdev);
6664
6665 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 6666 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
6667
6668 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
6669 ret += 4 * PAGE_SIZE; /* the scrq message queue */
6670
507ebe64 6671 for (i = 0; i < adapter->num_active_rx_pools; i++)
032c5e82
TF		 6672 ret += adapter->rx_pool[i].size *
6673 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
6674
6675 return ret;
6676}
6677
6678static int ibmvnic_resume(struct device *dev)
6679{
6680 struct net_device *netdev = dev_get_drvdata(dev);
6681 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 6682
cb89ba24
JA		 6683 if (adapter->state != VNIC_OPEN)
6684 return 0;
6685
a248878d 6686 tasklet_schedule(&adapter->tasklet);
032c5e82
TF		 6687
6688 return 0;
6689}
6690
8c37bc67 6691static const struct vio_device_id ibmvnic_device_table[] = {
032c5e82
TF		 6692 {"network", "IBM,vnic"},
6693 {"", "" }
6694};
6695MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
6696
6697static const struct dev_pm_ops ibmvnic_pm_ops = {
6698 .resume = ibmvnic_resume
6699};
6700
6701static struct vio_driver ibmvnic_driver = {
6702 .id_table = ibmvnic_device_table,
6703 .probe = ibmvnic_probe,
6704 .remove = ibmvnic_remove,
6705 .get_desired_dma = ibmvnic_get_desired_dma,
6706 .name = ibmvnic_driver_name,
6707 .pm = &ibmvnic_pm_ops,
6708};
6709
6710/* module functions */
6711static int __init ibmvnic_module_init(void)
6712{
92125c3a
NC		 6713 int ret;
6714
6715 ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online",
6716 ibmvnic_cpu_online,
6717 ibmvnic_cpu_down_prep);
6718 if (ret < 0)
6719 goto out;
6720 ibmvnic_online = ret;
6721 ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead",
6722 NULL, ibmvnic_cpu_dead);
6723 if (ret)
6724 goto err_dead;
6725
6726 ret = vio_register_driver(&ibmvnic_driver);
6727 if (ret)
6728 goto err_vio_register;
6729
032c5e82
TF		 6730 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
6731 IBMVNIC_DRIVER_VERSION);
6732
92125c3a
NC		 6733 return 0;
6734err_vio_register:
6735 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD);
6736err_dead:
6737 cpuhp_remove_multi_state(ibmvnic_online);
6738out:
6739 return ret;
032c5e82
TF		 6740}
6741
6742static void __exit ibmvnic_module_exit(void)
6743{
6744 vio_unregister_driver(&ibmvnic_driver);
92125c3a
NC		 6745 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD);
6746 cpuhp_remove_multi_state(ibmvnic_online);
032c5e82
TF		 6747}
6748
6749module_init(ibmvnic_module_init);
6750module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)