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ibmvnic: queue reset when CRQ gets closed during reset
[linux-2.6-block.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
4eb50ceb 62#include <linux/if_arp.h>
032c5e82
TF		 63#include <linux/in.h>
64#include <linux/ip.h>
ad7775dc 65#include <linux/ipv6.h>
032c5e82
TF		 66#include <linux/irq.h>
67#include <linux/kthread.h>
68#include <linux/seq_file.h>
032c5e82
TF		 69#include <linux/interrupt.h>
70#include <net/net_namespace.h>
71#include <asm/hvcall.h>
72#include <linux/atomic.h>
73#include <asm/vio.h>
74#include <asm/iommu.h>
75#include <linux/uaccess.h>
76#include <asm/firmware.h>
65dc6891 77#include <linux/workqueue.h>
6052d5e2 78#include <linux/if_vlan.h>
37798d02 79#include <linux/utsname.h>
032c5e82
TF		 80
81#include "ibmvnic.h"
82
83static const char ibmvnic_driver_name[] = "ibmvnic";
84static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
85
78b07ac1 86MODULE_AUTHOR("Santiago Leon");
032c5e82
TF		 87MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88MODULE_LICENSE("GPL");
89MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
90
91static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92static int ibmvnic_remove(struct vio_dev *);
93static void release_sub_crqs(struct ibmvnic_adapter *);
94static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
ad7775dc 100static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 101static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110static int ibmvnic_poll(struct napi_struct *napi, int data);
111static void send_map_query(struct ibmvnic_adapter *adapter);
112static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 114static void send_login(struct ibmvnic_adapter *adapter);
115static void send_cap_queries(struct ibmvnic_adapter *adapter);
4d96f12a 116static int init_sub_crqs(struct ibmvnic_adapter *);
bd0b6723 117static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 118static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 119static void release_crq_queue(struct ibmvnic_adapter *);
c26eba03 120static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
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))
129#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
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
156static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
157 unsigned long length, unsigned long *number,
158 unsigned long *irq)
159{
160 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
161 long rc;
162
163 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
164 *number = retbuf[0];
165 *irq = retbuf[1];
166
167 return rc;
168}
169
032c5e82
TF		 170static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
171 struct ibmvnic_long_term_buff *ltb, int size)
172{
173 struct device *dev = &adapter->vdev->dev;
174
175 ltb->size = size;
176 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
177 GFP_KERNEL);
178
179 if (!ltb->buff) {
180 dev_err(dev, "Couldn't alloc long term buffer\n");
181 return -ENOMEM;
182 }
183 ltb->map_id = adapter->map_id;
184 adapter->map_id++;
db5d0b59
NF		 185
186 init_completion(&adapter->fw_done);
032c5e82
TF		 187 send_request_map(adapter, ltb->addr,
188 ltb->size, ltb->map_id);
032c5e82 189 wait_for_completion(&adapter->fw_done);
f3be0cbc
TF		 190
191 if (adapter->fw_done_rc) {
192 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
193 adapter->fw_done_rc);
194 return -1;
195 }
032c5e82
TF		 196 return 0;
197}
198
199static void free_long_term_buff(struct ibmvnic_adapter *adapter,
200 struct ibmvnic_long_term_buff *ltb)
201{
202 struct device *dev = &adapter->vdev->dev;
203
c657e32c
NF		 204 if (!ltb->buff)
205 return;
206
ed651a10
NF		 207 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
208 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 209 send_request_unmap(adapter, ltb->map_id);
59af56c2 210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 211}
212
f3be0cbc
TF		 213static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
214 struct ibmvnic_long_term_buff *ltb)
215{
216 memset(ltb->buff, 0, ltb->size);
217
218 init_completion(&adapter->fw_done);
219 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
220 wait_for_completion(&adapter->fw_done);
221
222 if (adapter->fw_done_rc) {
223 dev_info(&adapter->vdev->dev,
224 "Reset failed, attempting to free and reallocate buffer\n");
225 free_long_term_buff(adapter, ltb);
226 return alloc_long_term_buff(adapter, ltb, ltb->size);
227 }
228 return 0;
229}
230
f185a49a
TF		 231static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
232{
233 int i;
234
235 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
236 i++)
237 adapter->rx_pool[i].active = 0;
238}
239
032c5e82
TF		 240static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
241 struct ibmvnic_rx_pool *pool)
242{
243 int count = pool->size - atomic_read(&pool->available);
244 struct device *dev = &adapter->vdev->dev;
245 int buffers_added = 0;
246 unsigned long lpar_rc;
247 union sub_crq sub_crq;
248 struct sk_buff *skb;
249 unsigned int offset;
250 dma_addr_t dma_addr;
251 unsigned char *dst;
252 u64 *handle_array;
253 int shift = 0;
254 int index;
255 int i;
256
f185a49a
TF		 257 if (!pool->active)
258 return;
259
032c5e82
TF		 260 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
261 be32_to_cpu(adapter->login_rsp_buf->
262 off_rxadd_subcrqs));
263
264 for (i = 0; i < count; ++i) {
265 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
266 if (!skb) {
267 dev_err(dev, "Couldn't replenish rx buff\n");
268 adapter->replenish_no_mem++;
269 break;
270 }
271
272 index = pool->free_map[pool->next_free];
273
274 if (pool->rx_buff[index].skb)
275 dev_err(dev, "Inconsistent free_map!\n");
276
277 /* Copy the skb to the long term mapped DMA buffer */
278 offset = index * pool->buff_size;
279 dst = pool->long_term_buff.buff + offset;
280 memset(dst, 0, pool->buff_size);
281 dma_addr = pool->long_term_buff.addr + offset;
282 pool->rx_buff[index].data = dst;
283
284 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
285 pool->rx_buff[index].dma = dma_addr;
286 pool->rx_buff[index].skb = skb;
287 pool->rx_buff[index].pool_index = pool->index;
288 pool->rx_buff[index].size = pool->buff_size;
289
290 memset(&sub_crq, 0, sizeof(sub_crq));
291 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
292 sub_crq.rx_add.correlator =
293 cpu_to_be64((u64)&pool->rx_buff[index]);
294 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
295 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
296
297 /* The length field of the sCRQ is defined to be 24 bits so the
298 * buffer size needs to be left shifted by a byte before it is
299 * converted to big endian to prevent the last byte from being
300 * truncated.
301 */
302#ifdef __LITTLE_ENDIAN__
303 shift = 8;
304#endif
305 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
306
307 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
308 &sub_crq);
309 if (lpar_rc != H_SUCCESS)
310 goto failure;
311
312 buffers_added++;
313 adapter->replenish_add_buff_success++;
314 pool->next_free = (pool->next_free + 1) % pool->size;
315 }
316 atomic_add(buffers_added, &pool->available);
317 return;
318
319failure:
320 dev_info(dev, "replenish pools failure\n");
321 pool->free_map[pool->next_free] = index;
322 pool->rx_buff[index].skb = NULL;
323 if (!dma_mapping_error(dev, dma_addr))
324 dma_unmap_single(dev, dma_addr, pool->buff_size,
325 DMA_FROM_DEVICE);
326
327 dev_kfree_skb_any(skb);
328 adapter->replenish_add_buff_failure++;
329 atomic_add(buffers_added, &pool->available);
f185a49a
TF		 330
331 if (lpar_rc == H_CLOSED) {
332 /* Disable buffer pool replenishment and report carrier off if
333 * queue is closed. Firmware guarantees that a signal will
334 * be sent to the driver, triggering a reset.
335 */
336 deactivate_rx_pools(adapter);
337 netif_carrier_off(adapter->netdev);
338 }
032c5e82
TF		 339}
340
341static void replenish_pools(struct ibmvnic_adapter *adapter)
342{
343 int i;
344
032c5e82
TF		 345 adapter->replenish_task_cycles++;
346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
347 i++) {
348 if (adapter->rx_pool[i].active)
349 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
350 }
351}
352
3d52b594
JA		 353static void release_stats_buffers(struct ibmvnic_adapter *adapter)
354{
355 kfree(adapter->tx_stats_buffers);
356 kfree(adapter->rx_stats_buffers);
b0992eca
TF		 357 adapter->tx_stats_buffers = NULL;
358 adapter->rx_stats_buffers = NULL;
3d52b594
JA		 359}
360
361static int init_stats_buffers(struct ibmvnic_adapter *adapter)
362{
363 adapter->tx_stats_buffers =
364 kcalloc(adapter->req_tx_queues,
365 sizeof(struct ibmvnic_tx_queue_stats),
366 GFP_KERNEL);
367 if (!adapter->tx_stats_buffers)
368 return -ENOMEM;
369
370 adapter->rx_stats_buffers =
371 kcalloc(adapter->req_rx_queues,
372 sizeof(struct ibmvnic_rx_queue_stats),
373 GFP_KERNEL);
374 if (!adapter->rx_stats_buffers)
375 return -ENOMEM;
376
377 return 0;
378}
379
7bbc27a4
NF		 380static void release_stats_token(struct ibmvnic_adapter *adapter)
381{
382 struct device *dev = &adapter->vdev->dev;
383
384 if (!adapter->stats_token)
385 return;
386
387 dma_unmap_single(dev, adapter->stats_token,
388 sizeof(struct ibmvnic_statistics),
389 DMA_FROM_DEVICE);
390 adapter->stats_token = 0;
391}
392
393static int init_stats_token(struct ibmvnic_adapter *adapter)
394{
395 struct device *dev = &adapter->vdev->dev;
396 dma_addr_t stok;
397
398 stok = dma_map_single(dev, &adapter->stats,
399 sizeof(struct ibmvnic_statistics),
400 DMA_FROM_DEVICE);
401 if (dma_mapping_error(dev, stok)) {
402 dev_err(dev, "Couldn't map stats buffer\n");
403 return -1;
404 }
405
406 adapter->stats_token = stok;
d1cf33d9 407 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
7bbc27a4
NF		 408 return 0;
409}
410
8c0543ad
NF		 411static int reset_rx_pools(struct ibmvnic_adapter *adapter)
412{
413 struct ibmvnic_rx_pool *rx_pool;
414 int rx_scrqs;
f3be0cbc 415 int i, j, rc;
896d8695
JA		 416 u64 *size_array;
417
418 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
419 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
8c0543ad
NF		 420
421 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
422 for (i = 0; i < rx_scrqs; i++) {
423 rx_pool = &adapter->rx_pool[i];
424
d1cf33d9
NF		 425 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
426
896d8695
JA		 427 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
428 free_long_term_buff(adapter, &rx_pool->long_term_buff);
429 rx_pool->buff_size = be64_to_cpu(size_array[i]);
430 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
431 rx_pool->size *
432 rx_pool->buff_size);
433 } else {
434 rc = reset_long_term_buff(adapter,
435 &rx_pool->long_term_buff);
436 }
437
f3be0cbc
TF		 438 if (rc)
439 return rc;
8c0543ad
NF		 440
441 for (j = 0; j < rx_pool->size; j++)
442 rx_pool->free_map[j] = j;
443
444 memset(rx_pool->rx_buff, 0,
445 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
446
447 atomic_set(&rx_pool->available, 0);
448 rx_pool->next_alloc = 0;
449 rx_pool->next_free = 0;
c3e53b9a 450 rx_pool->active = 1;
8c0543ad
NF		 451 }
452
453 return 0;
454}
455
0ffe2cb7 456static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 457{
0ffe2cb7 458 struct ibmvnic_rx_pool *rx_pool;
0ffe2cb7 459 int i, j;
032c5e82 460
0ffe2cb7 461 if (!adapter->rx_pool)
032c5e82
TF		 462 return;
463
896d8695 464 for (i = 0; i < adapter->num_active_rx_pools; i++) {
0ffe2cb7
NF		 465 rx_pool = &adapter->rx_pool[i];
466
d1cf33d9
NF		 467 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
468
0ffe2cb7
NF		 469 kfree(rx_pool->free_map);
470 free_long_term_buff(adapter, &rx_pool->long_term_buff);
471
472 if (!rx_pool->rx_buff)
e0ebe942 473 continue;
0ffe2cb7
NF		 474
475 for (j = 0; j < rx_pool->size; j++) {
476 if (rx_pool->rx_buff[j].skb) {
477 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
478 rx_pool->rx_buff[i].skb = NULL;
479 }
480 }
481
482 kfree(rx_pool->rx_buff);
483 }
484
485 kfree(adapter->rx_pool);
486 adapter->rx_pool = NULL;
896d8695 487 adapter->num_active_rx_pools = 0;
0ffe2cb7
NF		 488}
489
490static int init_rx_pools(struct net_device *netdev)
491{
492 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
493 struct device *dev = &adapter->vdev->dev;
494 struct ibmvnic_rx_pool *rx_pool;
495 int rxadd_subcrqs;
496 u64 *size_array;
497 int i, j;
498
499 rxadd_subcrqs =
500 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
501 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
502 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
503
504 adapter->rx_pool = kcalloc(rxadd_subcrqs,
505 sizeof(struct ibmvnic_rx_pool),
506 GFP_KERNEL);
507 if (!adapter->rx_pool) {
508 dev_err(dev, "Failed to allocate rx pools\n");
509 return -1;
510 }
511
896d8695
JA		 512 adapter->num_active_rx_pools = 0;
513
0ffe2cb7
NF		 514 for (i = 0; i < rxadd_subcrqs; i++) {
515 rx_pool = &adapter->rx_pool[i];
516
517 netdev_dbg(adapter->netdev,
d1cf33d9 518 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
0ffe2cb7
NF		 519 i, adapter->req_rx_add_entries_per_subcrq,
520 be64_to_cpu(size_array[i]));
521
522 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
523 rx_pool->index = i;
524 rx_pool->buff_size = be64_to_cpu(size_array[i]);
525 rx_pool->active = 1;
526
527 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
528 GFP_KERNEL);
529 if (!rx_pool->free_map) {
530 release_rx_pools(adapter);
531 return -1;
032c5e82 532 }
0ffe2cb7
NF		 533
534 rx_pool->rx_buff = kcalloc(rx_pool->size,
535 sizeof(struct ibmvnic_rx_buff),
536 GFP_KERNEL);
537 if (!rx_pool->rx_buff) {
538 dev_err(dev, "Couldn't alloc rx buffers\n");
539 release_rx_pools(adapter);
540 return -1;
541 }
542
543 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
544 rx_pool->size * rx_pool->buff_size)) {
545 release_rx_pools(adapter);
546 return -1;
547 }
548
549 for (j = 0; j < rx_pool->size; ++j)
550 rx_pool->free_map[j] = j;
551
552 atomic_set(&rx_pool->available, 0);
553 rx_pool->next_alloc = 0;
554 rx_pool->next_free = 0;
032c5e82 555 }
0ffe2cb7 556
896d8695
JA		 557 adapter->num_active_rx_pools = rxadd_subcrqs;
558
0ffe2cb7 559 return 0;
032c5e82
TF		 560}
561
8c0543ad
NF		 562static int reset_tx_pools(struct ibmvnic_adapter *adapter)
563{
564 struct ibmvnic_tx_pool *tx_pool;
565 int tx_scrqs;
f3be0cbc 566 int i, j, rc;
8c0543ad
NF		 567
568 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
569 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9
NF		 570 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
571
8c0543ad
NF		 572 tx_pool = &adapter->tx_pool[i];
573
f3be0cbc
TF		 574 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
575 if (rc)
576 return rc;
8c0543ad 577
fdb06105
TF		 578 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
579 if (rc)
580 return rc;
581
8c0543ad
NF		 582 memset(tx_pool->tx_buff, 0,
583 adapter->req_tx_entries_per_subcrq *
584 sizeof(struct ibmvnic_tx_buff));
585
586 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
587 tx_pool->free_map[j] = j;
588
589 tx_pool->consumer_index = 0;
590 tx_pool->producer_index = 0;
fdb06105 591 tx_pool->tso_index = 0;
8c0543ad
NF		 592 }
593
594 return 0;
595}
596
4e6759be
DANR		 597static void release_vpd_data(struct ibmvnic_adapter *adapter)
598{
599 if (!adapter->vpd)
600 return;
601
602 kfree(adapter->vpd->buff);
603 kfree(adapter->vpd);
b0992eca
TF		 604
605 adapter->vpd = NULL;
4e6759be
DANR		 606}
607
c657e32c
NF		 608static void release_tx_pools(struct ibmvnic_adapter *adapter)
609{
610 struct ibmvnic_tx_pool *tx_pool;
896d8695 611 int i;
c657e32c
NF		 612
613 if (!adapter->tx_pool)
614 return;
615
896d8695 616 for (i = 0; i < adapter->num_active_tx_pools; i++) {
d1cf33d9 617 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
c657e32c
NF		 618 tx_pool = &adapter->tx_pool[i];
619 kfree(tx_pool->tx_buff);
620 free_long_term_buff(adapter, &tx_pool->long_term_buff);
fdb06105 621 free_long_term_buff(adapter, &tx_pool->tso_ltb);
c657e32c
NF		 622 kfree(tx_pool->free_map);
623 }
624
625 kfree(adapter->tx_pool);
626 adapter->tx_pool = NULL;
896d8695 627 adapter->num_active_tx_pools = 0;
c657e32c
NF		 628}
629
630static int init_tx_pools(struct net_device *netdev)
631{
632 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
633 struct device *dev = &adapter->vdev->dev;
634 struct ibmvnic_tx_pool *tx_pool;
635 int tx_subcrqs;
636 int i, j;
637
638 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
639 adapter->tx_pool = kcalloc(tx_subcrqs,
640 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
641 if (!adapter->tx_pool)
642 return -1;
643
896d8695
JA		 644 adapter->num_active_tx_pools = 0;
645
c657e32c
NF		 646 for (i = 0; i < tx_subcrqs; i++) {
647 tx_pool = &adapter->tx_pool[i];
d1cf33d9
NF		 648
649 netdev_dbg(adapter->netdev,
650 "Initializing tx_pool[%d], %lld buffs\n",
651 i, adapter->req_tx_entries_per_subcrq);
652
c657e32c
NF		 653 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
654 sizeof(struct ibmvnic_tx_buff),
655 GFP_KERNEL);
656 if (!tx_pool->tx_buff) {
657 dev_err(dev, "tx pool buffer allocation failed\n");
658 release_tx_pools(adapter);
659 return -1;
660 }
661
662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
663 adapter->req_tx_entries_per_subcrq *
664 adapter->req_mtu)) {
665 release_tx_pools(adapter);
666 return -1;
667 }
668
fdb06105
TF		 669 /* alloc TSO ltb */
670 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
671 IBMVNIC_TSO_BUFS *
672 IBMVNIC_TSO_BUF_SZ)) {
673 release_tx_pools(adapter);
674 return -1;
675 }
676
677 tx_pool->tso_index = 0;
678
c657e32c
NF		 679 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
680 sizeof(int), GFP_KERNEL);
681 if (!tx_pool->free_map) {
682 release_tx_pools(adapter);
683 return -1;
684 }
685
686 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
687 tx_pool->free_map[j] = j;
688
689 tx_pool->consumer_index = 0;
690 tx_pool->producer_index = 0;
691 }
692
896d8695
JA		 693 adapter->num_active_tx_pools = tx_subcrqs;
694
c657e32c
NF		 695 return 0;
696}
697
661a2622
NF		 698static void release_error_buffers(struct ibmvnic_adapter *adapter)
699{
700 struct device *dev = &adapter->vdev->dev;
701 struct ibmvnic_error_buff *error_buff, *tmp;
702 unsigned long flags;
703
704 spin_lock_irqsave(&adapter->error_list_lock, flags);
705 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
706 list_del(&error_buff->list);
707 dma_unmap_single(dev, error_buff->dma, error_buff->len,
708 DMA_FROM_DEVICE);
709 kfree(error_buff->buff);
710 kfree(error_buff);
711 }
712 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
713}
714
d944c3d6
JA		 715static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
716{
717 int i;
718
719 if (adapter->napi_enabled)
720 return;
721
722 for (i = 0; i < adapter->req_rx_queues; i++)
723 napi_enable(&adapter->napi[i]);
724
725 adapter->napi_enabled = true;
726}
727
728static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
729{
730 int i;
731
732 if (!adapter->napi_enabled)
733 return;
734
d1cf33d9
NF		 735 for (i = 0; i < adapter->req_rx_queues; i++) {
736 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
d944c3d6 737 napi_disable(&adapter->napi[i]);
d1cf33d9 738 }
d944c3d6
JA		 739
740 adapter->napi_enabled = false;
741}
742
a57a5d25 743static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 744{
745 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 746 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 747 struct device *dev = &adapter->vdev->dev;
4d96f12a 748 int rc;
032c5e82 749
bd0b6723
JA		 750 do {
751 if (adapter->renegotiate) {
752 adapter->renegotiate = false;
b510888f 753 release_sub_crqs(adapter);
bd0b6723
JA		 754
755 reinit_completion(&adapter->init_done);
756 send_cap_queries(adapter);
757 if (!wait_for_completion_timeout(&adapter->init_done,
758 timeout)) {
759 dev_err(dev, "Capabilities query timeout\n");
760 return -1;
761 }
4d96f12a
TF		 762 rc = init_sub_crqs(adapter);
763 if (rc) {
764 dev_err(dev,
765 "Initialization of SCRQ's failed\n");
766 return -1;
767 }
768 rc = init_sub_crq_irqs(adapter);
769 if (rc) {
770 dev_err(dev,
771 "Initialization of SCRQ's irqs failed\n");
772 return -1;
773 }
bd0b6723
JA		 774 }
775
776 reinit_completion(&adapter->init_done);
777 send_login(adapter);
778 if (!wait_for_completion_timeout(&adapter->init_done,
779 timeout)) {
780 dev_err(dev, "Login timeout\n");
781 return -1;
782 }
783 } while (adapter->renegotiate);
784
3d166130
TF		 785 /* handle pending MAC address changes after successful login */
786 if (adapter->mac_change_pending) {
787 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
788 adapter->mac_change_pending = false;
789 }
790
a57a5d25
JA		 791 return 0;
792}
793
1b8955ee
NF		 794static void release_resources(struct ibmvnic_adapter *adapter)
795{
c7bac00b
NF		 796 int i;
797
4e6759be
DANR		 798 release_vpd_data(adapter);
799
1b8955ee
NF		 800 release_tx_pools(adapter);
801 release_rx_pools(adapter);
802
1b8955ee 803 release_stats_token(adapter);
3d52b594 804 release_stats_buffers(adapter);
661a2622 805 release_error_buffers(adapter);
c7bac00b
NF		 806
807 if (adapter->napi) {
808 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 809 if (&adapter->napi[i]) {
810 netdev_dbg(adapter->netdev,
811 "Releasing napi[%d]\n", i);
c7bac00b 812 netif_napi_del(&adapter->napi[i]);
d1cf33d9 813 }
c7bac00b
NF		 814 }
815 }
1b8955ee
NF		 816}
817
53da09e9
NF		 818static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
819{
820 struct net_device *netdev = adapter->netdev;
821 unsigned long timeout = msecs_to_jiffies(30000);
822 union ibmvnic_crq crq;
823 bool resend;
824 int rc;
825
d1cf33d9
NF		 826 netdev_dbg(netdev, "setting link state %d\n", link_state);
827
53da09e9
NF		 828 memset(&crq, 0, sizeof(crq));
829 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
830 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
831 crq.logical_link_state.link_state = link_state;
832
833 do {
834 resend = false;
835
836 reinit_completion(&adapter->init_done);
837 rc = ibmvnic_send_crq(adapter, &crq);
838 if (rc) {
839 netdev_err(netdev, "Failed to set link state\n");
840 return rc;
841 }
842
843 if (!wait_for_completion_timeout(&adapter->init_done,
844 timeout)) {
845 netdev_err(netdev, "timeout setting link state\n");
846 return -1;
847 }
848
849 if (adapter->init_done_rc == 1) {
850 /* Partuial success, delay and re-send */
851 mdelay(1000);
852 resend = true;
853 }
854 } while (resend);
855
856 return 0;
857}
858
7f3c6e6b
TF		 859static int set_real_num_queues(struct net_device *netdev)
860{
861 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
862 int rc;
863
d1cf33d9
NF		 864 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
865 adapter->req_tx_queues, adapter->req_rx_queues);
866
7f3c6e6b
TF		 867 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
868 if (rc) {
869 netdev_err(netdev, "failed to set the number of tx queues\n");
870 return rc;
871 }
872
873 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
874 if (rc)
875 netdev_err(netdev, "failed to set the number of rx queues\n");
876
877 return rc;
878}
879
4e6759be
DANR		 880static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
881{
882 struct device *dev = &adapter->vdev->dev;
883 union ibmvnic_crq crq;
4e6759be
DANR		 884 int len = 0;
885
886 if (adapter->vpd->buff)
887 len = adapter->vpd->len;
888
69d08dcb 889 init_completion(&adapter->fw_done);
4e6759be
DANR		 890 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
891 crq.get_vpd_size.cmd = GET_VPD_SIZE;
892 ibmvnic_send_crq(adapter, &crq);
893 wait_for_completion(&adapter->fw_done);
894
895 if (!adapter->vpd->len)
896 return -ENODATA;
897
898 if (!adapter->vpd->buff)
899 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
900 else if (adapter->vpd->len != len)
901 adapter->vpd->buff =
902 krealloc(adapter->vpd->buff,
903 adapter->vpd->len, GFP_KERNEL);
904
905 if (!adapter->vpd->buff) {
906 dev_err(dev, "Could allocate VPD buffer\n");
907 return -ENOMEM;
908 }
909
910 adapter->vpd->dma_addr =
911 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
912 DMA_FROM_DEVICE);
f743106e 913 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
4e6759be
DANR		 914 dev_err(dev, "Could not map VPD buffer\n");
915 kfree(adapter->vpd->buff);
b0992eca 916 adapter->vpd->buff = NULL;
4e6759be
DANR		 917 return -ENOMEM;
918 }
919
920 reinit_completion(&adapter->fw_done);
921 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
922 crq.get_vpd.cmd = GET_VPD;
923 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
924 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
925 ibmvnic_send_crq(adapter, &crq);
926 wait_for_completion(&adapter->fw_done);
927
928 return 0;
929}
930
bfc32f29 931static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 932{
bfc32f29
NF		 933 struct net_device *netdev = adapter->netdev;
934 int i, rc;
a57a5d25 935
7f3c6e6b
TF		 936 rc = set_real_num_queues(netdev);
937 if (rc)
938 return rc;
bd0b6723 939
3d52b594
JA		 940 rc = init_stats_buffers(adapter);
941 if (rc)
942 return rc;
943
5d5e84eb
NF		 944 rc = init_stats_token(adapter);
945 if (rc)
946 return rc;
947
4e6759be
DANR		 948 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
949 if (!adapter->vpd)
950 return -ENOMEM;
951
69d08dcb
JA		 952 /* Vital Product Data (VPD) */
953 rc = ibmvnic_get_vpd(adapter);
954 if (rc) {
955 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
956 return rc;
957 }
958
032c5e82
TF		 959 adapter->map_id = 1;
960 adapter->napi = kcalloc(adapter->req_rx_queues,
961 sizeof(struct napi_struct), GFP_KERNEL);
962 if (!adapter->napi)
bfc32f29
NF		 963 return -ENOMEM;
964
032c5e82 965 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 966 netdev_dbg(netdev, "Adding napi[%d]\n", i);
032c5e82
TF		 967 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
968 NAPI_POLL_WEIGHT);
032c5e82 969 }
032c5e82 970
032c5e82 971 send_map_query(adapter);
0ffe2cb7
NF		 972
973 rc = init_rx_pools(netdev);
974 if (rc)
bfc32f29 975 return rc;
032c5e82 976
c657e32c 977 rc = init_tx_pools(netdev);
bfc32f29
NF		 978 return rc;
979}
980
ed651a10 981static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 982{
983 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 984 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 985 int i, rc;
986
90c8014c 987 adapter->state = VNIC_OPENING;
032c5e82 988 replenish_pools(adapter);
d944c3d6 989 ibmvnic_napi_enable(adapter);
bfc32f29 990
032c5e82
TF		 991 /* We're ready to receive frames, enable the sub-crq interrupts and
992 * set the logical link state to up
993 */
ed651a10 994 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 995 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
ed651a10
NF		 996 if (prev_state == VNIC_CLOSED)
997 enable_irq(adapter->rx_scrq[i]->irq);
998 else
999 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1000 }
032c5e82 1001
ed651a10 1002 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 1003 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
ed651a10
NF		 1004 if (prev_state == VNIC_CLOSED)
1005 enable_irq(adapter->tx_scrq[i]->irq);
1006 else
1007 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1008 }
032c5e82 1009
53da09e9 1010 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 1011 if (rc) {
1012 for (i = 0; i < adapter->req_rx_queues; i++)
1013 napi_disable(&adapter->napi[i]);
1014 release_resources(adapter);
ed651a10 1015 return rc;
bfc32f29 1016 }
032c5e82 1017
ed651a10
NF		 1018 netif_tx_start_all_queues(netdev);
1019
1020 if (prev_state == VNIC_CLOSED) {
1021 for (i = 0; i < adapter->req_rx_queues; i++)
1022 napi_schedule(&adapter->napi[i]);
1023 }
1024
1025 adapter->state = VNIC_OPEN;
1026 return rc;
1027}
1028
1029static int ibmvnic_open(struct net_device *netdev)
1030{
1031 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
69d08dcb 1032 int rc;
ed651a10
NF		 1033
1034 mutex_lock(&adapter->reset_lock);
1035
1036 if (adapter->state != VNIC_CLOSED) {
1037 rc = ibmvnic_login(netdev);
1038 if (rc) {
1039 mutex_unlock(&adapter->reset_lock);
1040 return rc;
1041 }
1042
1043 rc = init_resources(adapter);
1044 if (rc) {
1045 netdev_err(netdev, "failed to initialize resources\n");
1046 release_resources(adapter);
1047 mutex_unlock(&adapter->reset_lock);
1048 return rc;
1049 }
1050 }
1051
1052 rc = __ibmvnic_open(netdev);
e876a8a7 1053 netif_carrier_on(netdev);
4e6759be 1054
ed651a10
NF		 1055 mutex_unlock(&adapter->reset_lock);
1056
bfc32f29 1057 return rc;
032c5e82
TF		 1058}
1059
b41b83e9
NF		 1060static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1061{
1062 struct ibmvnic_tx_pool *tx_pool;
1063 u64 tx_entries;
1064 int tx_scrqs;
1065 int i, j;
1066
1067 if (!adapter->tx_pool)
1068 return;
1069
1070 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1071 tx_entries = adapter->req_tx_entries_per_subcrq;
1072
1073 /* Free any remaining skbs in the tx buffer pools */
1074 for (i = 0; i < tx_scrqs; i++) {
1075 tx_pool = &adapter->tx_pool[i];
1076 if (!tx_pool)
1077 continue;
1078
d1cf33d9 1079 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
b41b83e9
NF		 1080 for (j = 0; j < tx_entries; j++) {
1081 if (tx_pool->tx_buff[j].skb) {
1082 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1083 tx_pool->tx_buff[j].skb = NULL;
1084 }
1085 }
1086 }
1087}
1088
ed651a10 1089static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 1090{
1091 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 1092 int rc = 0;
ea5509f5
JA		 1093 int i;
1094
90c8014c 1095 adapter->state = VNIC_CLOSING;
4c2687a5
TF		 1096
1097 /* ensure that transmissions are stopped if called by do_reset */
1098 if (adapter->resetting)
1099 netif_tx_disable(netdev);
1100 else
1101 netif_tx_stop_all_queues(netdev);
1102
d944c3d6 1103 ibmvnic_napi_disable(adapter);
46293b94
NF		 1104
1105 if (adapter->tx_scrq) {
1106 for (i = 0; i < adapter->req_tx_queues; i++)
d1cf33d9
NF		 1107 if (adapter->tx_scrq[i]->irq) {
1108 netdev_dbg(adapter->netdev,
1109 "Disabling tx_scrq[%d] irq\n", i);
46293b94 1110 disable_irq(adapter->tx_scrq[i]->irq);
d1cf33d9 1111 }
46293b94
NF		 1112 }
1113
53da09e9 1114 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 1115 if (rc)
1116 return rc;
1117
1118 if (adapter->rx_scrq) {
1119 for (i = 0; i < adapter->req_rx_queues; i++) {
1120 int retries = 10;
1121
1122 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1123 retries--;
1124 mdelay(100);
1125
1126 if (retries == 0)
1127 break;
1128 }
1129
d1cf33d9
NF		 1130 if (adapter->rx_scrq[i]->irq) {
1131 netdev_dbg(adapter->netdev,
1132 "Disabling rx_scrq[%d] irq\n", i);
46293b94 1133 disable_irq(adapter->rx_scrq[i]->irq);
d1cf33d9 1134 }
46293b94
NF		 1135 }
1136 }
ea5509f5 1137
10f76215 1138 clean_tx_pools(adapter);
90c8014c 1139 adapter->state = VNIC_CLOSED;
53da09e9 1140 return rc;
032c5e82
TF		 1141}
1142
ed651a10
NF		 1143static int ibmvnic_close(struct net_device *netdev)
1144{
1145 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1146 int rc;
1147
1148 mutex_lock(&adapter->reset_lock);
1149 rc = __ibmvnic_close(netdev);
1150 mutex_unlock(&adapter->reset_lock);
1151
1152 return rc;
1153}
1154
ad7775dc
TF		 1155/**
1156 * build_hdr_data - creates L2/L3/L4 header data buffer
1157 * @hdr_field - bitfield determining needed headers
1158 * @skb - socket buffer
1159 * @hdr_len - array of header lengths
1160 * @tot_len - total length of data
1161 *
1162 * Reads hdr_field to determine which headers are needed by firmware.
1163 * Builds a buffer containing these headers. Saves individual header
1164 * lengths and total buffer length to be used to build descriptors.
1165 */
1166static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1167 int *hdr_len, u8 *hdr_data)
1168{
1169 int len = 0;
1170 u8 *hdr;
1171
1172 hdr_len[0] = sizeof(struct ethhdr);
1173
1174 if (skb->protocol == htons(ETH_P_IP)) {
1175 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1176 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1177 hdr_len[2] = tcp_hdrlen(skb);
1178 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1179 hdr_len[2] = sizeof(struct udphdr);
1180 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1181 hdr_len[1] = sizeof(struct ipv6hdr);
1182 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1183 hdr_len[2] = tcp_hdrlen(skb);
1184 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1185 hdr_len[2] = sizeof(struct udphdr);
4eb50ceb
TF		 1186 } else if (skb->protocol == htons(ETH_P_ARP)) {
1187 hdr_len[1] = arp_hdr_len(skb->dev);
1188 hdr_len[2] = 0;
ad7775dc
TF		 1189 }
1190
1191 memset(hdr_data, 0, 120);
1192 if ((hdr_field >> 6) & 1) {
1193 hdr = skb_mac_header(skb);
1194 memcpy(hdr_data, hdr, hdr_len[0]);
1195 len += hdr_len[0];
1196 }
1197
1198 if ((hdr_field >> 5) & 1) {
1199 hdr = skb_network_header(skb);
1200 memcpy(hdr_data + len, hdr, hdr_len[1]);
1201 len += hdr_len[1];
1202 }
1203
1204 if ((hdr_field >> 4) & 1) {
1205 hdr = skb_transport_header(skb);
1206 memcpy(hdr_data + len, hdr, hdr_len[2]);
1207 len += hdr_len[2];
1208 }
1209 return len;
1210}
1211
1212/**
1213 * create_hdr_descs - create header and header extension descriptors
1214 * @hdr_field - bitfield determining needed headers
1215 * @data - buffer containing header data
1216 * @len - length of data buffer
1217 * @hdr_len - array of individual header lengths
1218 * @scrq_arr - descriptor array
1219 *
1220 * Creates header and, if needed, header extension descriptors and
1221 * places them in a descriptor array, scrq_arr
1222 */
1223
2de09681
TF		 1224static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1225 union sub_crq *scrq_arr)
ad7775dc
TF		 1226{
1227 union sub_crq hdr_desc;
1228 int tmp_len = len;
2de09681 1229 int num_descs = 0;
ad7775dc
TF		 1230 u8 *data, *cur;
1231 int tmp;
1232
1233 while (tmp_len > 0) {
1234 cur = hdr_data + len - tmp_len;
1235
1236 memset(&hdr_desc, 0, sizeof(hdr_desc));
1237 if (cur != hdr_data) {
1238 data = hdr_desc.hdr_ext.data;
1239 tmp = tmp_len > 29 ? 29 : tmp_len;
1240 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1241 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1242 hdr_desc.hdr_ext.len = tmp;
1243 } else {
1244 data = hdr_desc.hdr.data;
1245 tmp = tmp_len > 24 ? 24 : tmp_len;
1246 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1247 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1248 hdr_desc.hdr.len = tmp;
1249 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1250 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1251 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1252 hdr_desc.hdr.flag = hdr_field << 1;
1253 }
1254 memcpy(data, cur, tmp);
1255 tmp_len -= tmp;
1256 *scrq_arr = hdr_desc;
1257 scrq_arr++;
2de09681 1258 num_descs++;
ad7775dc 1259 }
2de09681
TF		 1260
1261 return num_descs;
ad7775dc
TF		 1262}
1263
1264/**
1265 * build_hdr_descs_arr - build a header descriptor array
1266 * @skb - socket buffer
1267 * @num_entries - number of descriptors to be sent
1268 * @subcrq - first TX descriptor
1269 * @hdr_field - bit field determining which headers will be sent
1270 *
1271 * This function will build a TX descriptor array with applicable
1272 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1273 */
1274
1275static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1276 int *num_entries, u8 hdr_field)
1277{
1278 int hdr_len[3] = {0, 0, 0};
2de09681 1279 int tot_len;
ad7775dc
TF		 1280 u8 *hdr_data = txbuff->hdr_data;
1281
1282 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1283 txbuff->hdr_data);
2de09681 1284 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
ad7775dc
TF		 1285 txbuff->indir_arr + 1);
1286}
1287
032c5e82
TF		 1288static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1289{
1290 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1291 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1292 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1293 struct device *dev = &adapter->vdev->dev;
1294 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1295 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1296 struct ibmvnic_tx_pool *tx_pool;
1297 unsigned int tx_send_failed = 0;
1298 unsigned int tx_map_failed = 0;
1299 unsigned int tx_dropped = 0;
1300 unsigned int tx_packets = 0;
1301 unsigned int tx_bytes = 0;
1302 dma_addr_t data_dma_addr;
1303 struct netdev_queue *txq;
032c5e82
TF		 1304 unsigned long lpar_rc;
1305 union sub_crq tx_crq;
1306 unsigned int offset;
ad7775dc 1307 int num_entries = 1;
032c5e82
TF		 1308 unsigned char *dst;
1309 u64 *handle_array;
1310 int index = 0;
a0dca10f 1311 u8 proto = 0;
032c5e82
TF		 1312 int ret = 0;
1313
ed651a10 1314 if (adapter->resetting) {
7f5b0308
TF		 1315 if (!netif_subqueue_stopped(netdev, skb))
1316 netif_stop_subqueue(netdev, queue_num);
1317 dev_kfree_skb_any(skb);
1318
032c5e82
TF		 1319 tx_send_failed++;
1320 tx_dropped++;
7f5b0308 1321 ret = NETDEV_TX_OK;
032c5e82
TF		 1322 goto out;
1323 }
1324
161b8a81
NF		 1325 tx_pool = &adapter->tx_pool[queue_num];
1326 tx_scrq = adapter->tx_scrq[queue_num];
1327 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1328 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1329 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1330
032c5e82 1331 index = tx_pool->free_map[tx_pool->consumer_index];
fdb06105
TF		 1332
1333 if (skb_is_gso(skb)) {
1334 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1335 dst = tx_pool->tso_ltb.buff + offset;
1336 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1337 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1338 tx_pool->tso_index++;
1339 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1340 tx_pool->tso_index = 0;
1341 } else {
1342 offset = index * adapter->req_mtu;
1343 dst = tx_pool->long_term_buff.buff + offset;
1344 memset(dst, 0, adapter->req_mtu);
1345 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1346 }
032c5e82 1347
15482056
TF		 1348 if (skb_shinfo(skb)->nr_frags) {
1349 int cur, i;
1350
1351 /* Copy the head */
1352 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1353 cur = skb_headlen(skb);
1354
1355 /* Copy the frags */
1356 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1357 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1358
1359 memcpy(dst + cur,
1360 page_address(skb_frag_page(frag)) +
1361 frag->page_offset, skb_frag_size(frag));
1362 cur += skb_frag_size(frag);
1363 }
1364 } else {
1365 skb_copy_from_linear_data(skb, dst, skb->len);
1366 }
1367
032c5e82
TF		 1368 tx_pool->consumer_index =
1369 (tx_pool->consumer_index + 1) %
068d9f90 1370 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1371
1372 tx_buff = &tx_pool->tx_buff[index];
1373 tx_buff->skb = skb;
1374 tx_buff->data_dma[0] = data_dma_addr;
1375 tx_buff->data_len[0] = skb->len;
1376 tx_buff->index = index;
1377 tx_buff->pool_index = queue_num;
1378 tx_buff->last_frag = true;
032c5e82
TF		 1379
1380 memset(&tx_crq, 0, sizeof(tx_crq));
1381 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1382 tx_crq.v1.type = IBMVNIC_TX_DESC;
1383 tx_crq.v1.n_crq_elem = 1;
1384 tx_crq.v1.n_sge = 1;
1385 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1386 tx_crq.v1.correlator = cpu_to_be32(index);
fdb06105
TF		 1387 if (skb_is_gso(skb))
1388 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1389 else
1390 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
032c5e82
TF		 1391 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1392 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1393
1394 if (adapter->vlan_header_insertion) {
1395 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1396 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1397 }
1398
1399 if (skb->protocol == htons(ETH_P_IP)) {
a0dca10f
TF		 1400 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1401 proto = ip_hdr(skb)->protocol;
1402 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1403 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1404 proto = ipv6_hdr(skb)->nexthdr;
032c5e82
TF		 1405 }
1406
a0dca10f
TF		 1407 if (proto == IPPROTO_TCP)
1408 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1409 else if (proto == IPPROTO_UDP)
1410 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1411
ad7775dc 1412 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1413 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1414 hdrs += 2;
1415 }
fdb06105
TF		 1416 if (skb_is_gso(skb)) {
1417 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1418 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1419 hdrs += 2;
1420 }
ad7775dc
TF		 1421 /* determine if l2/3/4 headers are sent to firmware */
1422 if ((*hdrs >> 7) & 1 &&
1423 (skb->protocol == htons(ETH_P_IP) ||
4eb50ceb
TF		 1424 skb->protocol == htons(ETH_P_IPV6) ||
1425 skb->protocol == htons(ETH_P_ARP))) {
ad7775dc
TF		 1426 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1427 tx_crq.v1.n_crq_elem = num_entries;
1428 tx_buff->indir_arr[0] = tx_crq;
1429 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1430 sizeof(tx_buff->indir_arr),
1431 DMA_TO_DEVICE);
1432 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1433 dev_kfree_skb_any(skb);
1434 tx_buff->skb = NULL;
ad7775dc
TF		 1435 if (!firmware_has_feature(FW_FEATURE_CMO))
1436 dev_err(dev, "tx: unable to map descriptor array\n");
1437 tx_map_failed++;
1438 tx_dropped++;
7f5b0308 1439 ret = NETDEV_TX_OK;
ad7775dc
TF		 1440 goto out;
1441 }
498cd8e4 1442 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1443 (u64)tx_buff->indir_dma,
1444 (u64)num_entries);
1445 } else {
498cd8e4
JA		 1446 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1447 &tx_crq);
ad7775dc 1448 }
032c5e82
TF		 1449 if (lpar_rc != H_SUCCESS) {
1450 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1451
1452 if (tx_pool->consumer_index == 0)
1453 tx_pool->consumer_index =
068d9f90 1454 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1455 else
1456 tx_pool->consumer_index--;
1457
7f5b0308
TF		 1458 dev_kfree_skb_any(skb);
1459 tx_buff->skb = NULL;
1460
b8c80b84
TF		 1461 if (lpar_rc == H_CLOSED) {
1462 /* Disable TX and report carrier off if queue is closed.
1463 * Firmware guarantees that a signal will be sent to the
1464 * driver, triggering a reset or some other action.
1465 */
1466 netif_tx_stop_all_queues(netdev);
1467 netif_carrier_off(netdev);
1468 }
7f5b0308 1469
032c5e82
TF		 1470 tx_send_failed++;
1471 tx_dropped++;
7f5b0308 1472 ret = NETDEV_TX_OK;
032c5e82
TF		 1473 goto out;
1474 }
142c0ac4 1475
58c8c0c0
BK		 1476 if (atomic_inc_return(&tx_scrq->used)
1477 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1478 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1479 netif_stop_subqueue(netdev, queue_num);
1480 }
1481
032c5e82
TF		 1482 tx_packets++;
1483 tx_bytes += skb->len;
1484 txq->trans_start = jiffies;
1485 ret = NETDEV_TX_OK;
1486
1487out:
1488 netdev->stats.tx_dropped += tx_dropped;
1489 netdev->stats.tx_bytes += tx_bytes;
1490 netdev->stats.tx_packets += tx_packets;
1491 adapter->tx_send_failed += tx_send_failed;
1492 adapter->tx_map_failed += tx_map_failed;
3d52b594
JA		 1493 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1494 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1495 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
032c5e82
TF		 1496
1497 return ret;
1498}
1499
1500static void ibmvnic_set_multi(struct net_device *netdev)
1501{
1502 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1503 struct netdev_hw_addr *ha;
1504 union ibmvnic_crq crq;
1505
1506 memset(&crq, 0, sizeof(crq));
1507 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1508 crq.request_capability.cmd = REQUEST_CAPABILITY;
1509
1510 if (netdev->flags & IFF_PROMISC) {
1511 if (!adapter->promisc_supported)
1512 return;
1513 } else {
1514 if (netdev->flags & IFF_ALLMULTI) {
1515 /* Accept all multicast */
1516 memset(&crq, 0, sizeof(crq));
1517 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1518 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1519 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1520 ibmvnic_send_crq(adapter, &crq);
1521 } else if (netdev_mc_empty(netdev)) {
1522 /* Reject all multicast */
1523 memset(&crq, 0, sizeof(crq));
1524 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1525 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1526 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1527 ibmvnic_send_crq(adapter, &crq);
1528 } else {
1529 /* Accept one or more multicast(s) */
1530 netdev_for_each_mc_addr(ha, netdev) {
1531 memset(&crq, 0, sizeof(crq));
1532 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1533 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1534 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1535 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1536 ha->addr);
1537 ibmvnic_send_crq(adapter, &crq);
1538 }
1539 }
1540 }
1541}
1542
c26eba03 1543static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
032c5e82
TF		 1544{
1545 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1546 struct sockaddr *addr = p;
1547 union ibmvnic_crq crq;
1548
1549 if (!is_valid_ether_addr(addr->sa_data))
1550 return -EADDRNOTAVAIL;
1551
1552 memset(&crq, 0, sizeof(crq));
1553 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1554 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1555 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
f813614f
TF		 1556
1557 init_completion(&adapter->fw_done);
032c5e82 1558 ibmvnic_send_crq(adapter, &crq);
f813614f 1559 wait_for_completion(&adapter->fw_done);
032c5e82 1560 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
f813614f 1561 return adapter->fw_done_rc ? -EIO : 0;
032c5e82
TF		 1562}
1563
c26eba03
JA		 1564static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1565{
1566 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1567 struct sockaddr *addr = p;
f813614f 1568 int rc;
c26eba03 1569
3d166130 1570 if (adapter->state == VNIC_PROBED) {
c26eba03
JA		 1571 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1572 adapter->mac_change_pending = true;
1573 return 0;
1574 }
1575
f813614f 1576 rc = __ibmvnic_set_mac(netdev, addr);
c26eba03 1577
f813614f 1578 return rc;
c26eba03
JA		 1579}
1580
ed651a10
NF		 1581/**
1582 * do_reset returns zero if we are able to keep processing reset events, or
1583 * non-zero if we hit a fatal error and must halt.
1584 */
1585static int do_reset(struct ibmvnic_adapter *adapter,
1586 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1587{
896d8695 1588 u64 old_num_rx_queues, old_num_tx_queues;
ed651a10
NF		 1589 struct net_device *netdev = adapter->netdev;
1590 int i, rc;
1591
d1cf33d9
NF		 1592 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1593 rwi->reset_reason);
1594
ed651a10
NF		 1595 netif_carrier_off(netdev);
1596 adapter->reset_reason = rwi->reset_reason;
1597
896d8695
JA		 1598 old_num_rx_queues = adapter->req_rx_queues;
1599 old_num_tx_queues = adapter->req_tx_queues;
1600
ed651a10
NF		 1601 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1602 rc = ibmvnic_reenable_crq_queue(adapter);
1603 if (rc)
1604 return 0;
1605 }
1606
1607 rc = __ibmvnic_close(netdev);
1608 if (rc)
1609 return rc;
1610
c26eba03
JA		 1611 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1612 adapter->wait_for_reset) {
1613 release_resources(adapter);
1614 release_sub_crqs(adapter);
1615 release_crq_queue(adapter);
1616 }
1617
8cb31cfc
JA		 1618 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1619 /* remove the closed state so when we call open it appears
1620 * we are coming from the probed state.
1621 */
1622 adapter->state = VNIC_PROBED;
032c5e82 1623
8cb31cfc
JA		 1624 rc = ibmvnic_init(adapter);
1625 if (rc)
2a1bf511 1626 return IBMVNIC_INIT_FAILED;
ed651a10 1627
8cb31cfc
JA		 1628 /* If the adapter was in PROBE state prior to the reset,
1629 * exit here.
1630 */
1631 if (reset_state == VNIC_PROBED)
1632 return 0;
ed651a10 1633
8cb31cfc
JA		 1634 rc = ibmvnic_login(netdev);
1635 if (rc) {
1636 adapter->state = VNIC_PROBED;
1637 return 0;
1638 }
ed651a10 1639
c26eba03
JA		 1640 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1641 adapter->wait_for_reset) {
1642 rc = init_resources(adapter);
1643 if (rc)
1644 return rc;
896d8695
JA		 1645 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1646 adapter->req_tx_queues != old_num_tx_queues) {
1647 release_rx_pools(adapter);
1648 release_tx_pools(adapter);
1649 init_rx_pools(netdev);
1650 init_tx_pools(netdev);
c26eba03
JA		 1651 } else {
1652 rc = reset_tx_pools(adapter);
1653 if (rc)
1654 return rc;
8c0543ad 1655
c26eba03
JA		 1656 rc = reset_rx_pools(adapter);
1657 if (rc)
1658 return rc;
ed651a10 1659
c26eba03
JA		 1660 if (reset_state == VNIC_CLOSED)
1661 return 0;
1662 }
8cb31cfc 1663 }
ed651a10
NF		 1664
1665 rc = __ibmvnic_open(netdev);
1666 if (rc) {
1667 if (list_empty(&adapter->rwi_list))
1668 adapter->state = VNIC_CLOSED;
1669 else
1670 adapter->state = reset_state;
1671
1672 return 0;
1673 }
1674
1675 netif_carrier_on(netdev);
1676
1677 /* kick napi */
1678 for (i = 0; i < adapter->req_rx_queues; i++)
1679 napi_schedule(&adapter->napi[i]);
1680
61d3e1d9
NF		 1681 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1682 netdev_notify_peers(netdev);
1683
ed651a10
NF		 1684 return 0;
1685}
1686
1687static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1688{
1689 struct ibmvnic_rwi *rwi;
1690
1691 mutex_lock(&adapter->rwi_lock);
1692
1693 if (!list_empty(&adapter->rwi_list)) {
1694 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1695 list);
1696 list_del(&rwi->list);
1697 } else {
1698 rwi = NULL;
1699 }
1700
1701 mutex_unlock(&adapter->rwi_lock);
1702 return rwi;
1703}
1704
1705static void free_all_rwi(struct ibmvnic_adapter *adapter)
1706{
1707 struct ibmvnic_rwi *rwi;
1708
1709 rwi = get_next_rwi(adapter);
1710 while (rwi) {
1711 kfree(rwi);
1712 rwi = get_next_rwi(adapter);
1713 }
1714}
1715
1716static void __ibmvnic_reset(struct work_struct *work)
1717{
1718 struct ibmvnic_rwi *rwi;
1719 struct ibmvnic_adapter *adapter;
1720 struct net_device *netdev;
1721 u32 reset_state;
c26eba03 1722 int rc = 0;
ed651a10
NF		 1723
1724 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1725 netdev = adapter->netdev;
1726
1727 mutex_lock(&adapter->reset_lock);
1728 adapter->resetting = true;
1729 reset_state = adapter->state;
1730
1731 rwi = get_next_rwi(adapter);
1732 while (rwi) {
1733 rc = do_reset(adapter, rwi, reset_state);
1734 kfree(rwi);
2a1bf511 1735 if (rc && rc != IBMVNIC_INIT_FAILED)
ed651a10
NF		 1736 break;
1737
1738 rwi = get_next_rwi(adapter);
1739 }
1740
c26eba03
JA		 1741 if (adapter->wait_for_reset) {
1742 adapter->wait_for_reset = false;
1743 adapter->reset_done_rc = rc;
1744 complete(&adapter->reset_done);
1745 }
1746
ed651a10 1747 if (rc) {
d1cf33d9 1748 netdev_dbg(adapter->netdev, "Reset failed\n");
ed651a10 1749 free_all_rwi(adapter);
6d0af07d 1750 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1751 return;
1752 }
1753
1754 adapter->resetting = false;
1755 mutex_unlock(&adapter->reset_lock);
1756}
1757
1758static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1759 enum ibmvnic_reset_reason reason)
1760{
1761 struct ibmvnic_rwi *rwi, *tmp;
1762 struct net_device *netdev = adapter->netdev;
1763 struct list_head *entry;
1764
1765 if (adapter->state == VNIC_REMOVING ||
1766 adapter->state == VNIC_REMOVED) {
1767 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1768 return;
1769 }
1770
6a2fb0e9
NF		 1771 if (adapter->state == VNIC_PROBING) {
1772 netdev_warn(netdev, "Adapter reset during probe\n");
1773 adapter->init_done_rc = EAGAIN;
1774 return;
1775 }
1776
ed651a10
NF		 1777 mutex_lock(&adapter->rwi_lock);
1778
1779 list_for_each(entry, &adapter->rwi_list) {
1780 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1781 if (tmp->reset_reason == reason) {
d1cf33d9 1782 netdev_dbg(netdev, "Skipping matching reset\n");
ed651a10
NF		 1783 mutex_unlock(&adapter->rwi_lock);
1784 return;
1785 }
1786 }
1787
1788 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1789 if (!rwi) {
1790 mutex_unlock(&adapter->rwi_lock);
1791 ibmvnic_close(netdev);
1792 return;
1793 }
1794
1795 rwi->reset_reason = reason;
1796 list_add_tail(&rwi->list, &adapter->rwi_list);
1797 mutex_unlock(&adapter->rwi_lock);
d1cf33d9
NF		 1798
1799 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
ed651a10
NF		 1800 schedule_work(&adapter->ibmvnic_reset);
1801}
1802
1803static void ibmvnic_tx_timeout(struct net_device *dev)
1804{
1805 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1806
1807 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1808}
1809
1810static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1811 struct ibmvnic_rx_buff *rx_buff)
1812{
1813 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1814
1815 rx_buff->skb = NULL;
1816
1817 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1818 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1819
1820 atomic_dec(&pool->available);
1821}
1822
1823static int ibmvnic_poll(struct napi_struct *napi, int budget)
1824{
1825 struct net_device *netdev = napi->dev;
1826 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1827 int scrq_num = (int)(napi - adapter->napi);
1828 int frames_processed = 0;
152ce47d 1829
032c5e82
TF		 1830restart_poll:
1831 while (frames_processed < budget) {
1832 struct sk_buff *skb;
1833 struct ibmvnic_rx_buff *rx_buff;
1834 union sub_crq *next;
1835 u32 length;
1836 u16 offset;
1837 u8 flags = 0;
1838
3468656f
JA		 1839 if (unlikely(adapter->resetting &&
1840 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
21ecba6c
TF		 1841 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1842 napi_complete_done(napi, frames_processed);
1843 return frames_processed;
1844 }
1845
032c5e82
TF		 1846 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1847 break;
1848 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1849 rx_buff =
1850 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1851 rx_comp.correlator);
1852 /* do error checking */
1853 if (next->rx_comp.rc) {
e1cea2e7
JA		 1854 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1855 be16_to_cpu(next->rx_comp.rc));
032c5e82
TF		 1856 /* free the entry */
1857 next->rx_comp.first = 0;
1858 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1859 continue;
032c5e82
TF		 1860 }
1861
1862 length = be32_to_cpu(next->rx_comp.len);
1863 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1864 flags = next->rx_comp.flags;
1865 skb = rx_buff->skb;
1866 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1867 length);
6052d5e2
MFV		 1868
1869 /* VLAN Header has been stripped by the system firmware and
1870 * needs to be inserted by the driver
1871 */
1872 if (adapter->rx_vlan_header_insertion &&
1873 (flags & IBMVNIC_VLAN_STRIPPED))
1874 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1875 ntohs(next->rx_comp.vlan_tci));
1876
032c5e82
TF		 1877 /* free the entry */
1878 next->rx_comp.first = 0;
1879 remove_buff_from_pool(adapter, rx_buff);
1880
1881 skb_put(skb, length);
1882 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1883 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1884
1885 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1886 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1887 skb->ip_summed = CHECKSUM_UNNECESSARY;
1888 }
1889
1890 length = skb->len;
1891 napi_gro_receive(napi, skb); /* send it up */
1892 netdev->stats.rx_packets++;
1893 netdev->stats.rx_bytes += length;
3d52b594
JA		 1894 adapter->rx_stats_buffers[scrq_num].packets++;
1895 adapter->rx_stats_buffers[scrq_num].bytes += length;
032c5e82
TF		 1896 frames_processed++;
1897 }
152ce47d
NF		 1898
1899 if (adapter->state != VNIC_CLOSING)
1900 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1901
1902 if (frames_processed < budget) {
1903 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1904 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1905 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1906 napi_reschedule(napi)) {
1907 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1908 goto restart_poll;
1909 }
1910 }
1911 return frames_processed;
1912}
1913
1914#ifdef CONFIG_NET_POLL_CONTROLLER
1915static void ibmvnic_netpoll_controller(struct net_device *dev)
1916{
1917 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1918 int i;
1919
1920 replenish_pools(netdev_priv(dev));
1921 for (i = 0; i < adapter->req_rx_queues; i++)
1922 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1923 adapter->rx_scrq[i]);
1924}
1925#endif
1926
c26eba03
JA		 1927static int wait_for_reset(struct ibmvnic_adapter *adapter)
1928{
1929 adapter->fallback.mtu = adapter->req_mtu;
1930 adapter->fallback.rx_queues = adapter->req_rx_queues;
1931 adapter->fallback.tx_queues = adapter->req_tx_queues;
1932 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1933 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1934
1935 init_completion(&adapter->reset_done);
1936 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1937 adapter->wait_for_reset = true;
1938 wait_for_completion(&adapter->reset_done);
1939
1940 if (adapter->reset_done_rc) {
1941 adapter->desired.mtu = adapter->fallback.mtu;
1942 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1943 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1944 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1945 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1946
1947 init_completion(&adapter->reset_done);
1948 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1949 wait_for_completion(&adapter->reset_done);
1950 }
1951 adapter->wait_for_reset = false;
1952
1953 return adapter->reset_done_rc;
1954}
1955
3a807b75
JA		 1956static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1957{
c26eba03
JA		 1958 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1959
1960 adapter->desired.mtu = new_mtu + ETH_HLEN;
1961
1962 return wait_for_reset(adapter);
3a807b75
JA		 1963}
1964
032c5e82
TF		 1965static const struct net_device_ops ibmvnic_netdev_ops = {
1966 .ndo_open = ibmvnic_open,
1967 .ndo_stop = ibmvnic_close,
1968 .ndo_start_xmit = ibmvnic_xmit,
1969 .ndo_set_rx_mode = ibmvnic_set_multi,
1970 .ndo_set_mac_address = ibmvnic_set_mac,
1971 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1972 .ndo_tx_timeout = ibmvnic_tx_timeout,
1973#ifdef CONFIG_NET_POLL_CONTROLLER
1974 .ndo_poll_controller = ibmvnic_netpoll_controller,
1975#endif
3a807b75 1976 .ndo_change_mtu = ibmvnic_change_mtu,
032c5e82
TF		 1977};
1978
1979/* ethtool functions */
1980
8a43379f
PR		 1981static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1982 struct ethtool_link_ksettings *cmd)
032c5e82 1983{
8a43379f
PR		 1984 u32 supported, advertising;
1985
1986 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1987 SUPPORTED_FIBRE);
8a43379f 1988 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1989 ADVERTISED_FIBRE);
8a43379f
PR		 1990 cmd->base.speed = SPEED_1000;
1991 cmd->base.duplex = DUPLEX_FULL;
1992 cmd->base.port = PORT_FIBRE;
1993 cmd->base.phy_address = 0;
1994 cmd->base.autoneg = AUTONEG_ENABLE;
1995
1996 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1997 supported);
1998 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1999 advertising);
2000
032c5e82
TF		 2001 return 0;
2002}
2003
4e6759be 2004static void ibmvnic_get_drvinfo(struct net_device *netdev,
032c5e82
TF		 2005 struct ethtool_drvinfo *info)
2006{
4e6759be
DANR		 2007 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2008
032c5e82
TF		 2009 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2010 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
4e6759be
DANR		 2011 strlcpy(info->fw_version, adapter->fw_version,
2012 sizeof(info->fw_version));
032c5e82
TF		 2013}
2014
2015static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2016{
2017 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2018
2019 return adapter->msg_enable;
2020}
2021
2022static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2023{
2024 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2025
2026 adapter->msg_enable = data;
2027}
2028
2029static u32 ibmvnic_get_link(struct net_device *netdev)
2030{
2031 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2032
2033 /* Don't need to send a query because we request a logical link up at
2034 * init and then we wait for link state indications
2035 */
2036 return adapter->logical_link_state;
2037}
2038
2039static void ibmvnic_get_ringparam(struct net_device *netdev,
2040 struct ethtool_ringparam *ring)
2041{
bc131b3a
JA		 2042 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2043
2044 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2045 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
032c5e82
TF		 2046 ring->rx_mini_max_pending = 0;
2047 ring->rx_jumbo_max_pending = 0;
bc131b3a
JA		 2048 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2049 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2050 ring->rx_mini_pending = 0;
2051 ring->rx_jumbo_pending = 0;
2052}
2053
c26eba03
JA		 2054static int ibmvnic_set_ringparam(struct net_device *netdev,
2055 struct ethtool_ringparam *ring)
2056{
2057 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2058
2059 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2060 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2061 netdev_err(netdev, "Invalid request.\n");
2062 netdev_err(netdev, "Max tx buffers = %llu\n",
2063 adapter->max_rx_add_entries_per_subcrq);
2064 netdev_err(netdev, "Max rx buffers = %llu\n",
2065 adapter->max_tx_entries_per_subcrq);
2066 return -EINVAL;
2067 }
2068
2069 adapter->desired.rx_entries = ring->rx_pending;
2070 adapter->desired.tx_entries = ring->tx_pending;
2071
2072 return wait_for_reset(adapter);
2073}
2074
c2dbeb67
JA		 2075static void ibmvnic_get_channels(struct net_device *netdev,
2076 struct ethtool_channels *channels)
2077{
2078 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2079
2080 channels->max_rx = adapter->max_rx_queues;
2081 channels->max_tx = adapter->max_tx_queues;
2082 channels->max_other = 0;
2083 channels->max_combined = 0;
2084 channels->rx_count = adapter->req_rx_queues;
2085 channels->tx_count = adapter->req_tx_queues;
2086 channels->other_count = 0;
2087 channels->combined_count = 0;
2088}
2089
c26eba03
JA		 2090static int ibmvnic_set_channels(struct net_device *netdev,
2091 struct ethtool_channels *channels)
2092{
2093 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2094
2095 adapter->desired.rx_queues = channels->rx_count;
2096 adapter->desired.tx_queues = channels->tx_count;
2097
2098 return wait_for_reset(adapter);
2099}
2100
032c5e82
TF		 2101static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2102{
3d52b594 2103 struct ibmvnic_adapter *adapter = netdev_priv(dev);
032c5e82
TF		 2104 int i;
2105
2106 if (stringset != ETH_SS_STATS)
2107 return;
2108
2109 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2110 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
3d52b594
JA		 2111
2112 for (i = 0; i < adapter->req_tx_queues; i++) {
2113 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2114 data += ETH_GSTRING_LEN;
2115
2116 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2117 data += ETH_GSTRING_LEN;
2118
2119 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2120 data += ETH_GSTRING_LEN;
2121 }
2122
2123 for (i = 0; i < adapter->req_rx_queues; i++) {
2124 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2125 data += ETH_GSTRING_LEN;
2126
2127 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2128 data += ETH_GSTRING_LEN;
2129
2130 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2131 data += ETH_GSTRING_LEN;
2132 }
032c5e82
TF		 2133}
2134
2135static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2136{
3d52b594
JA		 2137 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2138
032c5e82
TF		 2139 switch (sset) {
2140 case ETH_SS_STATS:
3d52b594
JA		 2141 return ARRAY_SIZE(ibmvnic_stats) +
2142 adapter->req_tx_queues * NUM_TX_STATS +
2143 adapter->req_rx_queues * NUM_RX_STATS;
032c5e82
TF		 2144 default:
2145 return -EOPNOTSUPP;
2146 }
2147}
2148
2149static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2150 struct ethtool_stats *stats, u64 *data)
2151{
2152 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2153 union ibmvnic_crq crq;
3d52b594 2154 int i, j;
032c5e82
TF		 2155
2156 memset(&crq, 0, sizeof(crq));
2157 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2158 crq.request_statistics.cmd = REQUEST_STATISTICS;
2159 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2160 crq.request_statistics.len =
2161 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 2162
2163 /* Wait for data to be written */
2164 init_completion(&adapter->stats_done);
db5d0b59 2165 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 2166 wait_for_completion(&adapter->stats_done);
2167
2168 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
52da5c11
JA		 2169 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2170 ibmvnic_stats[i].offset));
3d52b594
JA		 2171
2172 for (j = 0; j < adapter->req_tx_queues; j++) {
2173 data[i] = adapter->tx_stats_buffers[j].packets;
2174 i++;
2175 data[i] = adapter->tx_stats_buffers[j].bytes;
2176 i++;
2177 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2178 i++;
2179 }
2180
2181 for (j = 0; j < adapter->req_rx_queues; j++) {
2182 data[i] = adapter->rx_stats_buffers[j].packets;
2183 i++;
2184 data[i] = adapter->rx_stats_buffers[j].bytes;
2185 i++;
2186 data[i] = adapter->rx_stats_buffers[j].interrupts;
2187 i++;
2188 }
032c5e82
TF		 2189}
2190
2191static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 2192 .get_drvinfo = ibmvnic_get_drvinfo,
2193 .get_msglevel = ibmvnic_get_msglevel,
2194 .set_msglevel = ibmvnic_set_msglevel,
2195 .get_link = ibmvnic_get_link,
2196 .get_ringparam = ibmvnic_get_ringparam,
c26eba03 2197 .set_ringparam = ibmvnic_set_ringparam,
c2dbeb67 2198 .get_channels = ibmvnic_get_channels,
c26eba03 2199 .set_channels = ibmvnic_set_channels,
032c5e82
TF		 2200 .get_strings = ibmvnic_get_strings,
2201 .get_sset_count = ibmvnic_get_sset_count,
2202 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 2203 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 2204};
2205
2206/* Routines for managing CRQs/sCRQs */
2207
57a49436
NF		 2208static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2209 struct ibmvnic_sub_crq_queue *scrq)
2210{
2211 int rc;
2212
2213 if (scrq->irq) {
2214 free_irq(scrq->irq, scrq);
2215 irq_dispose_mapping(scrq->irq);
2216 scrq->irq = 0;
2217 }
2218
c8b2ad0a 2219 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
57a49436
NF		 2220 scrq->cur = 0;
2221
2222 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2223 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2224 return rc;
2225}
2226
2227static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2228{
2229 int i, rc;
2230
2231 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 2232 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
57a49436
NF		 2233 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2234 if (rc)
2235 return rc;
2236 }
2237
2238 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 2239 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
57a49436
NF		 2240 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2241 if (rc)
2242 return rc;
2243 }
2244
57a49436
NF		 2245 return rc;
2246}
2247
032c5e82
TF		 2248static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2249 struct ibmvnic_sub_crq_queue *scrq)
2250{
2251 struct device *dev = &adapter->vdev->dev;
2252 long rc;
2253
2254 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2255
2256 /* Close the sub-crqs */
2257 do {
2258 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2259 adapter->vdev->unit_address,
2260 scrq->crq_num);
2261 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2262
ffa73855
TF		 2263 if (rc) {
2264 netdev_err(adapter->netdev,
2265 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2266 scrq->crq_num, rc);
2267 }
2268
032c5e82
TF		 2269 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2270 DMA_BIDIRECTIONAL);
2271 free_pages((unsigned long)scrq->msgs, 2);
2272 kfree(scrq);
2273}
2274
2275static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2276 *adapter)
2277{
2278 struct device *dev = &adapter->vdev->dev;
2279 struct ibmvnic_sub_crq_queue *scrq;
2280 int rc;
2281
1bb3c739 2282 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 2283 if (!scrq)
2284 return NULL;
2285
7f7adc50 2286 scrq->msgs =
1bb3c739 2287 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 2288 if (!scrq->msgs) {
2289 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2290 goto zero_page_failed;
2291 }
2292
2293 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2294 DMA_BIDIRECTIONAL);
2295 if (dma_mapping_error(dev, scrq->msg_token)) {
2296 dev_warn(dev, "Couldn't map crq queue messages page\n");
2297 goto map_failed;
2298 }
2299
2300 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2301 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2302
2303 if (rc == H_RESOURCE)
2304 rc = ibmvnic_reset_crq(adapter);
2305
2306 if (rc == H_CLOSED) {
2307 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2308 } else if (rc) {
2309 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2310 goto reg_failed;
2311 }
2312
032c5e82
TF		 2313 scrq->adapter = adapter;
2314 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 2315 spin_lock_init(&scrq->lock);
2316
2317 netdev_dbg(adapter->netdev,
2318 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2319 scrq->crq_num, scrq->hw_irq, scrq->irq);
2320
2321 return scrq;
2322
032c5e82
TF		 2323reg_failed:
2324 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2325 DMA_BIDIRECTIONAL);
2326map_failed:
2327 free_pages((unsigned long)scrq->msgs, 2);
2328zero_page_failed:
2329 kfree(scrq);
2330
2331 return NULL;
2332}
2333
2334static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2335{
2336 int i;
2337
2338 if (adapter->tx_scrq) {
b510888f
NF		 2339 for (i = 0; i < adapter->req_tx_queues; i++) {
2340 if (!adapter->tx_scrq[i])
2341 continue;
2342
d1cf33d9
NF		 2343 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2344 i);
b510888f 2345 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 2346 free_irq(adapter->tx_scrq[i]->irq,
2347 adapter->tx_scrq[i]);
88eb98a0 2348 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 2349 adapter->tx_scrq[i]->irq = 0;
032c5e82 2350 }
b510888f
NF		 2351
2352 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2353 }
2354
9501df3c 2355 kfree(adapter->tx_scrq);
032c5e82
TF		 2356 adapter->tx_scrq = NULL;
2357 }
2358
2359 if (adapter->rx_scrq) {
b510888f
NF		 2360 for (i = 0; i < adapter->req_rx_queues; i++) {
2361 if (!adapter->rx_scrq[i])
2362 continue;
2363
d1cf33d9
NF		 2364 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2365 i);
b510888f 2366 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 2367 free_irq(adapter->rx_scrq[i]->irq,
2368 adapter->rx_scrq[i]);
88eb98a0 2369 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 2370 adapter->rx_scrq[i]->irq = 0;
032c5e82 2371 }
032c5e82 2372
b510888f
NF		 2373 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2374 }
ea22d51a 2375
b510888f 2376 kfree(adapter->rx_scrq);
ea22d51a
TF		 2377 adapter->rx_scrq = NULL;
2378 }
ea22d51a
TF		 2379}
2380
032c5e82
TF		 2381static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2382 struct ibmvnic_sub_crq_queue *scrq)
2383{
2384 struct device *dev = &adapter->vdev->dev;
2385 unsigned long rc;
2386
2387 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2388 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2389 if (rc)
2390 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2391 scrq->hw_irq, rc);
2392 return rc;
2393}
2394
2395static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2396 struct ibmvnic_sub_crq_queue *scrq)
2397{
2398 struct device *dev = &adapter->vdev->dev;
2399 unsigned long rc;
2400
2401 if (scrq->hw_irq > 0x100000000ULL) {
2402 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2403 return 1;
2404 }
2405
2406 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2407 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2408 if (rc)
2409 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2410 scrq->hw_irq, rc);
2411 return rc;
2412}
2413
2414static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2415 struct ibmvnic_sub_crq_queue *scrq)
2416{
2417 struct device *dev = &adapter->vdev->dev;
2418 struct ibmvnic_tx_buff *txbuff;
2419 union sub_crq *next;
2420 int index;
2421 int i, j;
ad7775dc 2422 u8 first;
032c5e82
TF		 2423
2424restart_loop:
2425 while (pending_scrq(adapter, scrq)) {
2426 unsigned int pool = scrq->pool_index;
2427
2428 next = ibmvnic_next_scrq(adapter, scrq);
2429 for (i = 0; i < next->tx_comp.num_comps; i++) {
2430 if (next->tx_comp.rcs[i]) {
2431 dev_err(dev, "tx error %x\n",
2432 next->tx_comp.rcs[i]);
2433 continue;
2434 }
2435 index = be32_to_cpu(next->tx_comp.correlators[i]);
2436 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2437
2438 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2439 if (!txbuff->data_dma[j])
2440 continue;
2441
2442 txbuff->data_dma[j] = 0;
032c5e82 2443 }
ad7775dc
TF		 2444 /* if sub_crq was sent indirectly */
2445 first = txbuff->indir_arr[0].generic.first;
2446 if (first == IBMVNIC_CRQ_CMD) {
2447 dma_unmap_single(dev, txbuff->indir_dma,
2448 sizeof(txbuff->indir_arr),
2449 DMA_TO_DEVICE);
2450 }
032c5e82 2451
142c0ac4 2452 if (txbuff->last_frag) {
032c5e82 2453 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 2454 txbuff->skb = NULL;
142c0ac4 2455 }
032c5e82
TF		 2456
2457 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2458 producer_index] = index;
2459 adapter->tx_pool[pool].producer_index =
2460 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 2461 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2462 }
2463 /* remove tx_comp scrq*/
2464 next->tx_comp.first = 0;
7c3e7de3
NF		 2465
2466 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2467 (adapter->req_tx_entries_per_subcrq / 2) &&
2468 __netif_subqueue_stopped(adapter->netdev,
2469 scrq->pool_index)) {
2470 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2471 netdev_info(adapter->netdev, "Started queue %d\n",
2472 scrq->pool_index);
2473 }
032c5e82
TF		 2474 }
2475
2476 enable_scrq_irq(adapter, scrq);
2477
2478 if (pending_scrq(adapter, scrq)) {
2479 disable_scrq_irq(adapter, scrq);
2480 goto restart_loop;
2481 }
2482
2483 return 0;
2484}
2485
2486static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2487{
2488 struct ibmvnic_sub_crq_queue *scrq = instance;
2489 struct ibmvnic_adapter *adapter = scrq->adapter;
2490
2491 disable_scrq_irq(adapter, scrq);
2492 ibmvnic_complete_tx(adapter, scrq);
2493
2494 return IRQ_HANDLED;
2495}
2496
2497static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2498{
2499 struct ibmvnic_sub_crq_queue *scrq = instance;
2500 struct ibmvnic_adapter *adapter = scrq->adapter;
2501
09fb35ea
NF		 2502 /* When booting a kdump kernel we can hit pending interrupts
2503 * prior to completing driver initialization.
2504 */
2505 if (unlikely(adapter->state != VNIC_OPEN))
2506 return IRQ_NONE;
2507
3d52b594
JA		 2508 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2509
032c5e82
TF		 2510 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2511 disable_scrq_irq(adapter, scrq);
2512 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2513 }
2514
2515 return IRQ_HANDLED;
2516}
2517
ea22d51a
TF		 2518static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2519{
2520 struct device *dev = &adapter->vdev->dev;
2521 struct ibmvnic_sub_crq_queue *scrq;
2522 int i = 0, j = 0;
2523 int rc = 0;
2524
2525 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9
NF		 2526 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2527 i);
ea22d51a
TF		 2528 scrq = adapter->tx_scrq[i];
2529 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2530
99c1790e 2531 if (!scrq->irq) {
ea22d51a
TF		 2532 rc = -EINVAL;
2533 dev_err(dev, "Error mapping irq\n");
2534 goto req_tx_irq_failed;
2535 }
2536
2537 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2538 0, "ibmvnic_tx", scrq);
2539
2540 if (rc) {
2541 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2542 scrq->irq, rc);
2543 irq_dispose_mapping(scrq->irq);
2544 goto req_rx_irq_failed;
2545 }
2546 }
2547
2548 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 2549 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2550 i);
ea22d51a
TF		 2551 scrq = adapter->rx_scrq[i];
2552 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2553 if (!scrq->irq) {
ea22d51a
TF		 2554 rc = -EINVAL;
2555 dev_err(dev, "Error mapping irq\n");
2556 goto req_rx_irq_failed;
2557 }
2558 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2559 0, "ibmvnic_rx", scrq);
2560 if (rc) {
2561 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2562 scrq->irq, rc);
2563 irq_dispose_mapping(scrq->irq);
2564 goto req_rx_irq_failed;
2565 }
2566 }
2567 return rc;
2568
2569req_rx_irq_failed:
8bf371e6 2570 for (j = 0; j < i; j++) {
ea22d51a
TF		 2571 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2572 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2573 }
ea22d51a
TF		 2574 i = adapter->req_tx_queues;
2575req_tx_irq_failed:
8bf371e6 2576 for (j = 0; j < i; j++) {
ea22d51a
TF		 2577 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2578 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2579 }
b510888f 2580 release_sub_crqs(adapter);
ea22d51a
TF		 2581 return rc;
2582}
2583
d346b9bc 2584static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2585{
2586 struct device *dev = &adapter->vdev->dev;
2587 struct ibmvnic_sub_crq_queue **allqueues;
2588 int registered_queues = 0;
032c5e82
TF		 2589 int total_queues;
2590 int more = 0;
ea22d51a 2591 int i;
032c5e82 2592
032c5e82
TF		 2593 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2594
1bb3c739 2595 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2596 if (!allqueues)
d346b9bc 2597 return -1;
032c5e82
TF		 2598
2599 for (i = 0; i < total_queues; i++) {
2600 allqueues[i] = init_sub_crq_queue(adapter);
2601 if (!allqueues[i]) {
2602 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2603 break;
2604 }
2605 registered_queues++;
2606 }
2607
2608 /* Make sure we were able to register the minimum number of queues */
2609 if (registered_queues <
2610 adapter->min_tx_queues + adapter->min_rx_queues) {
2611 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2612 goto tx_failed;
2613 }
2614
2615 /* Distribute the failed allocated queues*/
2616 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2617 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2618 switch (i % 3) {
2619 case 0:
2620 if (adapter->req_rx_queues > adapter->min_rx_queues)
2621 adapter->req_rx_queues--;
2622 else
2623 more++;
2624 break;
2625 case 1:
2626 if (adapter->req_tx_queues > adapter->min_tx_queues)
2627 adapter->req_tx_queues--;
2628 else
2629 more++;
2630 break;
2631 }
2632 }
2633
2634 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2635 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2636 if (!adapter->tx_scrq)
2637 goto tx_failed;
2638
2639 for (i = 0; i < adapter->req_tx_queues; i++) {
2640 adapter->tx_scrq[i] = allqueues[i];
2641 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2642 }
2643
2644 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2645 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2646 if (!adapter->rx_scrq)
2647 goto rx_failed;
2648
2649 for (i = 0; i < adapter->req_rx_queues; i++) {
2650 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2651 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2652 }
2653
d346b9bc
NF		 2654 kfree(allqueues);
2655 return 0;
2656
2657rx_failed:
2658 kfree(adapter->tx_scrq);
2659 adapter->tx_scrq = NULL;
2660tx_failed:
2661 for (i = 0; i < registered_queues; i++)
2662 release_sub_crq_queue(adapter, allqueues[i]);
2663 kfree(allqueues);
2664 return -1;
2665}
2666
2667static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2668{
2669 struct device *dev = &adapter->vdev->dev;
2670 union ibmvnic_crq crq;
c26eba03 2671 int max_entries;
d346b9bc
NF		 2672
2673 if (!retry) {
2674 /* Sub-CRQ entries are 32 byte long */
2675 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2676
2677 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2678 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2679 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2680 return;
2681 }
2682
c26eba03
JA		 2683 if (adapter->desired.mtu)
2684 adapter->req_mtu = adapter->desired.mtu;
2685 else
2686 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2687
2688 if (!adapter->desired.tx_entries)
2689 adapter->desired.tx_entries =
2690 adapter->max_tx_entries_per_subcrq;
2691 if (!adapter->desired.rx_entries)
2692 adapter->desired.rx_entries =
2693 adapter->max_rx_add_entries_per_subcrq;
2694
2695 max_entries = IBMVNIC_MAX_LTB_SIZE /
2696 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2697
2698 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2699 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2700 adapter->desired.tx_entries = max_entries;
2701 }
d346b9bc 2702
c26eba03
JA		 2703 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2704 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2705 adapter->desired.rx_entries = max_entries;
2706 }
2707
2708 if (adapter->desired.tx_entries)
2709 adapter->req_tx_entries_per_subcrq =
2710 adapter->desired.tx_entries;
2711 else
2712 adapter->req_tx_entries_per_subcrq =
2713 adapter->max_tx_entries_per_subcrq;
2714
2715 if (adapter->desired.rx_entries)
2716 adapter->req_rx_add_entries_per_subcrq =
2717 adapter->desired.rx_entries;
2718 else
2719 adapter->req_rx_add_entries_per_subcrq =
2720 adapter->max_rx_add_entries_per_subcrq;
2721
2722 if (adapter->desired.tx_queues)
2723 adapter->req_tx_queues =
2724 adapter->desired.tx_queues;
2725 else
2726 adapter->req_tx_queues =
2727 adapter->opt_tx_comp_sub_queues;
2728
2729 if (adapter->desired.rx_queues)
2730 adapter->req_rx_queues =
2731 adapter->desired.rx_queues;
2732 else
2733 adapter->req_rx_queues =
2734 adapter->opt_rx_comp_queues;
2735
2736 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
d346b9bc
NF		 2737 }
2738
032c5e82
TF		 2739 memset(&crq, 0, sizeof(crq));
2740 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2741 crq.request_capability.cmd = REQUEST_CAPABILITY;
2742
2743 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2744 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2745 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2746 ibmvnic_send_crq(adapter, &crq);
2747
2748 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2749 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2750 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2751 ibmvnic_send_crq(adapter, &crq);
2752
2753 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2754 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2755 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2756 ibmvnic_send_crq(adapter, &crq);
2757
2758 crq.request_capability.capability =
2759 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2760 crq.request_capability.number =
de89e854 2761 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2762 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2763 ibmvnic_send_crq(adapter, &crq);
2764
2765 crq.request_capability.capability =
2766 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2767 crq.request_capability.number =
de89e854 2768 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2769 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2770 ibmvnic_send_crq(adapter, &crq);
2771
2772 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2773 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2774 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2775 ibmvnic_send_crq(adapter, &crq);
2776
2777 if (adapter->netdev->flags & IFF_PROMISC) {
2778 if (adapter->promisc_supported) {
2779 crq.request_capability.capability =
2780 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2781 crq.request_capability.number = cpu_to_be64(1);
901e040a 2782 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2783 ibmvnic_send_crq(adapter, &crq);
2784 }
2785 } else {
2786 crq.request_capability.capability =
2787 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2788 crq.request_capability.number = cpu_to_be64(0);
901e040a 2789 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2790 ibmvnic_send_crq(adapter, &crq);
2791 }
032c5e82
TF		 2792}
2793
2794static int pending_scrq(struct ibmvnic_adapter *adapter,
2795 struct ibmvnic_sub_crq_queue *scrq)
2796{
2797 union sub_crq *entry = &scrq->msgs[scrq->cur];
2798
1cf9cc72 2799 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
032c5e82
TF		 2800 return 1;
2801 else
2802 return 0;
2803}
2804
2805static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2806 struct ibmvnic_sub_crq_queue *scrq)
2807{
2808 union sub_crq *entry;
2809 unsigned long flags;
2810
2811 spin_lock_irqsave(&scrq->lock, flags);
2812 entry = &scrq->msgs[scrq->cur];
2813 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2814 if (++scrq->cur == scrq->size)
2815 scrq->cur = 0;
2816 } else {
2817 entry = NULL;
2818 }
2819 spin_unlock_irqrestore(&scrq->lock, flags);
2820
2821 return entry;
2822}
2823
2824static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2825{
2826 struct ibmvnic_crq_queue *queue = &adapter->crq;
2827 union ibmvnic_crq *crq;
2828
2829 crq = &queue->msgs[queue->cur];
2830 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2831 if (++queue->cur == queue->size)
2832 queue->cur = 0;
2833 } else {
2834 crq = NULL;
2835 }
2836
2837 return crq;
2838}
2839
2840static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2841 union sub_crq *sub_crq)
2842{
2843 unsigned int ua = adapter->vdev->unit_address;
2844 struct device *dev = &adapter->vdev->dev;
2845 u64 *u64_crq = (u64 *)sub_crq;
2846 int rc;
2847
2848 netdev_dbg(adapter->netdev,
2849 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2850 (unsigned long int)cpu_to_be64(remote_handle),
2851 (unsigned long int)cpu_to_be64(u64_crq[0]),
2852 (unsigned long int)cpu_to_be64(u64_crq[1]),
2853 (unsigned long int)cpu_to_be64(u64_crq[2]),
2854 (unsigned long int)cpu_to_be64(u64_crq[3]));
2855
2856 /* Make sure the hypervisor sees the complete request */
2857 mb();
2858
2859 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2860 cpu_to_be64(remote_handle),
2861 cpu_to_be64(u64_crq[0]),
2862 cpu_to_be64(u64_crq[1]),
2863 cpu_to_be64(u64_crq[2]),
2864 cpu_to_be64(u64_crq[3]));
2865
2866 if (rc) {
2867 if (rc == H_CLOSED)
2868 dev_warn(dev, "CRQ Queue closed\n");
2869 dev_err(dev, "Send error (rc=%d)\n", rc);
2870 }
2871
2872 return rc;
2873}
2874
ad7775dc
TF		 2875static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2876 u64 remote_handle, u64 ioba, u64 num_entries)
2877{
2878 unsigned int ua = adapter->vdev->unit_address;
2879 struct device *dev = &adapter->vdev->dev;
2880 int rc;
2881
2882 /* Make sure the hypervisor sees the complete request */
2883 mb();
2884 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2885 cpu_to_be64(remote_handle),
2886 ioba, num_entries);
2887
2888 if (rc) {
2889 if (rc == H_CLOSED)
2890 dev_warn(dev, "CRQ Queue closed\n");
2891 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2892 }
2893
2894 return rc;
2895}
2896
032c5e82
TF		 2897static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2898 union ibmvnic_crq *crq)
2899{
2900 unsigned int ua = adapter->vdev->unit_address;
2901 struct device *dev = &adapter->vdev->dev;
2902 u64 *u64_crq = (u64 *)crq;
2903 int rc;
2904
2905 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2906 (unsigned long int)cpu_to_be64(u64_crq[0]),
2907 (unsigned long int)cpu_to_be64(u64_crq[1]));
2908
2909 /* Make sure the hypervisor sees the complete request */
2910 mb();
2911
2912 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2913 cpu_to_be64(u64_crq[0]),
2914 cpu_to_be64(u64_crq[1]));
2915
2916 if (rc) {
ec95dffa 2917 if (rc == H_CLOSED) {
032c5e82 2918 dev_warn(dev, "CRQ Queue closed\n");
ec95dffa
NF		 2919 if (adapter->resetting)
2920 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2921 }
2922
032c5e82
TF		 2923 dev_warn(dev, "Send error (rc=%d)\n", rc);
2924 }
2925
2926 return rc;
2927}
2928
2929static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2930{
2931 union ibmvnic_crq crq;
2932
2933 memset(&crq, 0, sizeof(crq));
2934 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2935 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2936 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2937
2938 return ibmvnic_send_crq(adapter, &crq);
2939}
2940
032c5e82
TF		 2941static int send_version_xchg(struct ibmvnic_adapter *adapter)
2942{
2943 union ibmvnic_crq crq;
2944
2945 memset(&crq, 0, sizeof(crq));
2946 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2947 crq.version_exchange.cmd = VERSION_EXCHANGE;
2948 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2949
2950 return ibmvnic_send_crq(adapter, &crq);
2951}
2952
37798d02
NF		 2953struct vnic_login_client_data {
2954 u8 type;
2955 __be16 len;
2956 char name;
2957} __packed;
2958
2959static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2960{
2961 int len;
2962
2963 /* Calculate the amount of buffer space needed for the
2964 * vnic client data in the login buffer. There are four entries,
2965 * OS name, LPAR name, device name, and a null last entry.
2966 */
2967 len = 4 * sizeof(struct vnic_login_client_data);
2968 len += 6; /* "Linux" plus NULL */
2969 len += strlen(utsname()->nodename) + 1;
2970 len += strlen(adapter->netdev->name) + 1;
2971
2972 return len;
2973}
2974
2975static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2976 struct vnic_login_client_data *vlcd)
2977{
2978 const char *os_name = "Linux";
2979 int len;
2980
2981 /* Type 1 - LPAR OS */
2982 vlcd->type = 1;
2983 len = strlen(os_name) + 1;
2984 vlcd->len = cpu_to_be16(len);
2985 strncpy(&vlcd->name, os_name, len);
2986 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2987
2988 /* Type 2 - LPAR name */
2989 vlcd->type = 2;
2990 len = strlen(utsname()->nodename) + 1;
2991 vlcd->len = cpu_to_be16(len);
2992 strncpy(&vlcd->name, utsname()->nodename, len);
2993 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2994
2995 /* Type 3 - device name */
2996 vlcd->type = 3;
2997 len = strlen(adapter->netdev->name) + 1;
2998 vlcd->len = cpu_to_be16(len);
2999 strncpy(&vlcd->name, adapter->netdev->name, len);
3000}
3001
032c5e82
TF		 3002static void send_login(struct ibmvnic_adapter *adapter)
3003{
3004 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3005 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 3006 struct device *dev = &adapter->vdev->dev;
3007 dma_addr_t rsp_buffer_token;
3008 dma_addr_t buffer_token;
3009 size_t rsp_buffer_size;
3010 union ibmvnic_crq crq;
032c5e82
TF		 3011 size_t buffer_size;
3012 __be64 *tx_list_p;
3013 __be64 *rx_list_p;
37798d02
NF		 3014 int client_data_len;
3015 struct vnic_login_client_data *vlcd;
032c5e82
TF		 3016 int i;
3017
37798d02
NF		 3018 client_data_len = vnic_client_data_len(adapter);
3019
032c5e82
TF		 3020 buffer_size =
3021 sizeof(struct ibmvnic_login_buffer) +
37798d02
NF		 3022 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3023 client_data_len;
032c5e82 3024
37798d02 3025 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
032c5e82
TF		 3026 if (!login_buffer)
3027 goto buf_alloc_failed;
3028
3029 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3030 DMA_TO_DEVICE);
3031 if (dma_mapping_error(dev, buffer_token)) {
3032 dev_err(dev, "Couldn't map login buffer\n");
3033 goto buf_map_failed;
3034 }
3035
498cd8e4
JA		 3036 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3037 sizeof(u64) * adapter->req_tx_queues +
3038 sizeof(u64) * adapter->req_rx_queues +
3039 sizeof(u64) * adapter->req_rx_queues +
3040 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 3041
3042 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3043 if (!login_rsp_buffer)
3044 goto buf_rsp_alloc_failed;
3045
3046 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3047 rsp_buffer_size, DMA_FROM_DEVICE);
3048 if (dma_mapping_error(dev, rsp_buffer_token)) {
3049 dev_err(dev, "Couldn't map login rsp buffer\n");
3050 goto buf_rsp_map_failed;
3051 }
661a2622 3052
032c5e82
TF		 3053 adapter->login_buf = login_buffer;
3054 adapter->login_buf_token = buffer_token;
3055 adapter->login_buf_sz = buffer_size;
3056 adapter->login_rsp_buf = login_rsp_buffer;
3057 adapter->login_rsp_buf_token = rsp_buffer_token;
3058 adapter->login_rsp_buf_sz = rsp_buffer_size;
3059
3060 login_buffer->len = cpu_to_be32(buffer_size);
3061 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3062 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3063 login_buffer->off_txcomp_subcrqs =
3064 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3065 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3066 login_buffer->off_rxcomp_subcrqs =
3067 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3068 sizeof(u64) * adapter->req_tx_queues);
3069 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3070 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3071
3072 tx_list_p = (__be64 *)((char *)login_buffer +
3073 sizeof(struct ibmvnic_login_buffer));
3074 rx_list_p = (__be64 *)((char *)login_buffer +
3075 sizeof(struct ibmvnic_login_buffer) +
3076 sizeof(u64) * adapter->req_tx_queues);
3077
3078 for (i = 0; i < adapter->req_tx_queues; i++) {
3079 if (adapter->tx_scrq[i]) {
3080 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3081 crq_num);
3082 }
3083 }
3084
3085 for (i = 0; i < adapter->req_rx_queues; i++) {
3086 if (adapter->rx_scrq[i]) {
3087 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3088 crq_num);
3089 }
3090 }
3091
37798d02
NF		 3092 /* Insert vNIC login client data */
3093 vlcd = (struct vnic_login_client_data *)
3094 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3095 login_buffer->client_data_offset =
3096 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3097 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3098
3099 vnic_add_client_data(adapter, vlcd);
3100
032c5e82
TF		 3101 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3102 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3103 netdev_dbg(adapter->netdev, "%016lx\n",
3104 ((unsigned long int *)(adapter->login_buf))[i]);
3105 }
3106
3107 memset(&crq, 0, sizeof(crq));
3108 crq.login.first = IBMVNIC_CRQ_CMD;
3109 crq.login.cmd = LOGIN;
3110 crq.login.ioba = cpu_to_be32(buffer_token);
3111 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 3112 ibmvnic_send_crq(adapter, &crq);
3113
3114 return;
3115
032c5e82
TF		 3116buf_rsp_map_failed:
3117 kfree(login_rsp_buffer);
3118buf_rsp_alloc_failed:
3119 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3120buf_map_failed:
3121 kfree(login_buffer);
3122buf_alloc_failed:
3123 return;
3124}
3125
3126static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3127 u32 len, u8 map_id)
3128{
3129 union ibmvnic_crq crq;
3130
3131 memset(&crq, 0, sizeof(crq));
3132 crq.request_map.first = IBMVNIC_CRQ_CMD;
3133 crq.request_map.cmd = REQUEST_MAP;
3134 crq.request_map.map_id = map_id;
3135 crq.request_map.ioba = cpu_to_be32(addr);
3136 crq.request_map.len = cpu_to_be32(len);
3137 ibmvnic_send_crq(adapter, &crq);
3138}
3139
3140static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3141{
3142 union ibmvnic_crq crq;
3143
3144 memset(&crq, 0, sizeof(crq));
3145 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3146 crq.request_unmap.cmd = REQUEST_UNMAP;
3147 crq.request_unmap.map_id = map_id;
3148 ibmvnic_send_crq(adapter, &crq);
3149}
3150
3151static void send_map_query(struct ibmvnic_adapter *adapter)
3152{
3153 union ibmvnic_crq crq;
3154
3155 memset(&crq, 0, sizeof(crq));
3156 crq.query_map.first = IBMVNIC_CRQ_CMD;
3157 crq.query_map.cmd = QUERY_MAP;
3158 ibmvnic_send_crq(adapter, &crq);
3159}
3160
3161/* Send a series of CRQs requesting various capabilities of the VNIC server */
3162static void send_cap_queries(struct ibmvnic_adapter *adapter)
3163{
3164 union ibmvnic_crq crq;
3165
901e040a 3166 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 3167 memset(&crq, 0, sizeof(crq));
3168 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3169 crq.query_capability.cmd = QUERY_CAPABILITY;
3170
3171 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 3172 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3173 ibmvnic_send_crq(adapter, &crq);
3174
3175 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 3176 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3177 ibmvnic_send_crq(adapter, &crq);
3178
3179 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 3180 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3181 ibmvnic_send_crq(adapter, &crq);
3182
3183 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 3184 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3185 ibmvnic_send_crq(adapter, &crq);
3186
3187 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 3188 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3189 ibmvnic_send_crq(adapter, &crq);
3190
3191 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 3192 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3193 ibmvnic_send_crq(adapter, &crq);
3194
3195 crq.query_capability.capability =
3196 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 3197 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3198 ibmvnic_send_crq(adapter, &crq);
3199
3200 crq.query_capability.capability =
3201 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3202 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3203 ibmvnic_send_crq(adapter, &crq);
3204
3205 crq.query_capability.capability =
3206 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 3207 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3208 ibmvnic_send_crq(adapter, &crq);
3209
3210 crq.query_capability.capability =
3211 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3212 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3213 ibmvnic_send_crq(adapter, &crq);
3214
3215 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 3216 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3217 ibmvnic_send_crq(adapter, &crq);
3218
3219 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 3220 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3221 ibmvnic_send_crq(adapter, &crq);
3222
3223 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 3224 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3225 ibmvnic_send_crq(adapter, &crq);
3226
3227 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 3228 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3229 ibmvnic_send_crq(adapter, &crq);
3230
3231 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 3232 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3233 ibmvnic_send_crq(adapter, &crq);
3234
3235 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 3236 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3237 ibmvnic_send_crq(adapter, &crq);
3238
6052d5e2
MFV		 3239 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3240 atomic_inc(&adapter->running_cap_crqs);
3241 ibmvnic_send_crq(adapter, &crq);
3242
032c5e82 3243 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 3244 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3245 ibmvnic_send_crq(adapter, &crq);
3246
3247 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 3248 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3249 ibmvnic_send_crq(adapter, &crq);
3250
3251 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 3252 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3253 ibmvnic_send_crq(adapter, &crq);
3254
3255 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 3256 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3257 ibmvnic_send_crq(adapter, &crq);
3258
3259 crq.query_capability.capability =
3260 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 3261 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3262 ibmvnic_send_crq(adapter, &crq);
3263
3264 crq.query_capability.capability =
3265 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 3266 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3267 ibmvnic_send_crq(adapter, &crq);
3268
3269 crq.query_capability.capability =
3270 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 3271 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3272 ibmvnic_send_crq(adapter, &crq);
3273
3274 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 3275 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3276 ibmvnic_send_crq(adapter, &crq);
3277}
3278
4e6759be
DANR		 3279static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3280 struct ibmvnic_adapter *adapter)
3281{
3282 struct device *dev = &adapter->vdev->dev;
3283
3284 if (crq->get_vpd_size_rsp.rc.code) {
3285 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3286 crq->get_vpd_size_rsp.rc.code);
3287 complete(&adapter->fw_done);
3288 return;
3289 }
3290
3291 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3292 complete(&adapter->fw_done);
3293}
3294
3295static void handle_vpd_rsp(union ibmvnic_crq *crq,
3296 struct ibmvnic_adapter *adapter)
3297{
3298 struct device *dev = &adapter->vdev->dev;
21a2545b 3299 unsigned char *substr = NULL;
4e6759be
DANR		 3300 u8 fw_level_len = 0;
3301
3302 memset(adapter->fw_version, 0, 32);
3303
3304 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3305 DMA_FROM_DEVICE);
3306
3307 if (crq->get_vpd_rsp.rc.code) {
3308 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3309 crq->get_vpd_rsp.rc.code);
3310 goto complete;
3311 }
3312
3313 /* get the position of the firmware version info
3314 * located after the ASCII 'RM' substring in the buffer
3315 */
3316 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3317 if (!substr) {
a107311d 3318 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4e6759be
DANR		 3319 goto complete;
3320 }
3321
3322 /* get length of firmware level ASCII substring */
3323 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3324 fw_level_len = *(substr + 2);
3325 } else {
3326 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3327 goto complete;
3328 }
3329
3330 /* copy firmware version string from vpd into adapter */
3331 if ((substr + 3 + fw_level_len) <
3332 (adapter->vpd->buff + adapter->vpd->len)) {
21a2545b 3333 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4e6759be
DANR		 3334 } else {
3335 dev_info(dev, "FW substr extrapolated VPD buff\n");
3336 }
3337
3338complete:
21a2545b
DANR		 3339 if (adapter->fw_version[0] == '\0')
3340 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4e6759be
DANR		 3341 complete(&adapter->fw_done);
3342}
3343
032c5e82
TF		 3344static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3345{
3346 struct device *dev = &adapter->vdev->dev;
3347 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3348 union ibmvnic_crq crq;
3349 int i;
3350
3351 dma_unmap_single(dev, adapter->ip_offload_tok,
3352 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3353
3354 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3355 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3356 netdev_dbg(adapter->netdev, "%016lx\n",
3357 ((unsigned long int *)(buf))[i]);
3358
3359 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3360 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3361 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3362 buf->tcp_ipv4_chksum);
3363 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3364 buf->tcp_ipv6_chksum);
3365 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3366 buf->udp_ipv4_chksum);
3367 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3368 buf->udp_ipv6_chksum);
3369 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3370 buf->large_tx_ipv4);
3371 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3372 buf->large_tx_ipv6);
3373 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3374 buf->large_rx_ipv4);
3375 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3376 buf->large_rx_ipv6);
3377 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3378 buf->max_ipv4_header_size);
3379 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3380 buf->max_ipv6_header_size);
3381 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3382 buf->max_tcp_header_size);
3383 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3384 buf->max_udp_header_size);
3385 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3386 buf->max_large_tx_size);
3387 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3388 buf->max_large_rx_size);
3389 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3390 buf->ipv6_extension_header);
3391 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3392 buf->tcp_pseudosum_req);
3393 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3394 buf->num_ipv6_ext_headers);
3395 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3396 buf->off_ipv6_ext_headers);
3397
3398 adapter->ip_offload_ctrl_tok =
3399 dma_map_single(dev, &adapter->ip_offload_ctrl,
3400 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3401
3402 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3403 dev_err(dev, "Couldn't map ip offload control buffer\n");
3404 return;
3405 }
3406
f6897943
TF		 3407 adapter->ip_offload_ctrl.len =
3408 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
032c5e82 3409 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
f6897943
TF		 3410 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3411 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
032c5e82
TF		 3412 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3413 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3414 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3415 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
fdb06105
TF		 3416 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3417 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
032c5e82 3418
fdb06105 3419 /* large_rx disabled for now, additional features needed */
032c5e82
TF		 3420 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3421 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3422
15482056 3423 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
032c5e82
TF		 3424
3425 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3426 adapter->netdev->features |= NETIF_F_IP_CSUM;
3427
3428 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3429 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3430
9be02cdf
TF		 3431 if ((adapter->netdev->features &
3432 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3433 adapter->netdev->features |= NETIF_F_RXCSUM;
3434
fdb06105
TF		 3435 if (buf->large_tx_ipv4)
3436 adapter->netdev->features |= NETIF_F_TSO;
3437 if (buf->large_tx_ipv6)
3438 adapter->netdev->features |= NETIF_F_TSO6;
3439
aa0bf851
TF		 3440 adapter->netdev->hw_features |= adapter->netdev->features;
3441
032c5e82
TF		 3442 memset(&crq, 0, sizeof(crq));
3443 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3444 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3445 crq.control_ip_offload.len =
3446 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3447 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3448 ibmvnic_send_crq(adapter, &crq);
3449}
3450
3451static void handle_error_info_rsp(union ibmvnic_crq *crq,
3452 struct ibmvnic_adapter *adapter)
3453{
3454 struct device *dev = &adapter->vdev->dev;
96183182 3455 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 3456 unsigned long flags;
3457 bool found = false;
3458 int i;
3459
3460 if (!crq->request_error_rsp.rc.code) {
3461 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3462 crq->request_error_rsp.rc.code);
3463 return;
3464 }
3465
3466 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 3467 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 3468 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3469 found = true;
3470 list_del(&error_buff->list);
3471 break;
3472 }
3473 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3474
3475 if (!found) {
3476 dev_err(dev, "Couldn't find error id %x\n",
75224c93 3477 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3478 return;
3479 }
3480
3481 dev_err(dev, "Detailed info for error id %x:",
75224c93 3482 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3483
3484 for (i = 0; i < error_buff->len; i++) {
3485 pr_cont("%02x", (int)error_buff->buff[i]);
3486 if (i % 8 == 7)
3487 pr_cont(" ");
3488 }
3489 pr_cont("\n");
3490
3491 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3492 DMA_FROM_DEVICE);
3493 kfree(error_buff->buff);
3494 kfree(error_buff);
3495}
3496
2f9de9ba
NF		 3497static void request_error_information(struct ibmvnic_adapter *adapter,
3498 union ibmvnic_crq *err_crq)
032c5e82 3499{
032c5e82 3500 struct device *dev = &adapter->vdev->dev;
2f9de9ba 3501 struct net_device *netdev = adapter->netdev;
032c5e82 3502 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 3503 unsigned long timeout = msecs_to_jiffies(30000);
3504 union ibmvnic_crq crq;
032c5e82 3505 unsigned long flags;
2f9de9ba 3506 int rc, detail_len;
032c5e82
TF		 3507
3508 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3509 if (!error_buff)
3510 return;
3511
2f9de9ba 3512 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 3513 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3514 if (!error_buff->buff) {
3515 kfree(error_buff);
3516 return;
3517 }
3518
3519 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3520 DMA_FROM_DEVICE);
3521 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 3522 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 3523 kfree(error_buff->buff);
3524 kfree(error_buff);
3525 return;
3526 }
3527
032c5e82 3528 error_buff->len = detail_len;
2f9de9ba 3529 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 3530
3531 spin_lock_irqsave(&adapter->error_list_lock, flags);
3532 list_add_tail(&error_buff->list, &adapter->errors);
3533 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3534
2f9de9ba
NF		 3535 memset(&crq, 0, sizeof(crq));
3536 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3537 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3538 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3539 crq.request_error_info.len = cpu_to_be32(detail_len);
3540 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3541
3542 rc = ibmvnic_send_crq(adapter, &crq);
3543 if (rc) {
3544 netdev_err(netdev, "failed to request error information\n");
3545 goto err_info_fail;
3546 }
3547
3548 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3549 netdev_err(netdev, "timeout waiting for error information\n");
3550 goto err_info_fail;
3551 }
3552
3553 return;
3554
3555err_info_fail:
3556 spin_lock_irqsave(&adapter->error_list_lock, flags);
3557 list_del(&error_buff->list);
3558 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3559
3560 kfree(error_buff->buff);
3561 kfree(error_buff);
3562}
3563
3564static void handle_error_indication(union ibmvnic_crq *crq,
3565 struct ibmvnic_adapter *adapter)
3566{
3567 struct device *dev = &adapter->vdev->dev;
3568
3569 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3570 crq->error_indication.flags
3571 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3572 be32_to_cpu(crq->error_indication.error_id),
3573 be16_to_cpu(crq->error_indication.error_cause));
3574
3575 if (be32_to_cpu(crq->error_indication.error_id))
3576 request_error_information(adapter, crq);
ed651a10
NF		 3577
3578 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3579 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 3580 else
3581 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 3582}
3583
f813614f
TF		 3584static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3585 struct ibmvnic_adapter *adapter)
032c5e82
TF		 3586{
3587 struct net_device *netdev = adapter->netdev;
3588 struct device *dev = &adapter->vdev->dev;
3589 long rc;
3590
3591 rc = crq->change_mac_addr_rsp.rc.code;
3592 if (rc) {
3593 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
f813614f 3594 goto out;
032c5e82
TF		 3595 }
3596 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3597 ETH_ALEN);
f813614f
TF		 3598out:
3599 complete(&adapter->fw_done);
3600 return rc;
032c5e82
TF		 3601}
3602
3603static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3604 struct ibmvnic_adapter *adapter)
3605{
3606 struct device *dev = &adapter->vdev->dev;
3607 u64 *req_value;
3608 char *name;
3609
901e040a 3610 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 3611 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3612 case REQ_TX_QUEUES:
3613 req_value = &adapter->req_tx_queues;
3614 name = "tx";
3615 break;
3616 case REQ_RX_QUEUES:
3617 req_value = &adapter->req_rx_queues;
3618 name = "rx";
3619 break;
3620 case REQ_RX_ADD_QUEUES:
3621 req_value = &adapter->req_rx_add_queues;
3622 name = "rx_add";
3623 break;
3624 case REQ_TX_ENTRIES_PER_SUBCRQ:
3625 req_value = &adapter->req_tx_entries_per_subcrq;
3626 name = "tx_entries_per_subcrq";
3627 break;
3628 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3629 req_value = &adapter->req_rx_add_entries_per_subcrq;
3630 name = "rx_add_entries_per_subcrq";
3631 break;
3632 case REQ_MTU:
3633 req_value = &adapter->req_mtu;
3634 name = "mtu";
3635 break;
3636 case PROMISC_REQUESTED:
3637 req_value = &adapter->promisc;
3638 name = "promisc";
3639 break;
3640 default:
3641 dev_err(dev, "Got invalid cap request rsp %d\n",
3642 crq->request_capability.capability);
3643 return;
3644 }
3645
3646 switch (crq->request_capability_rsp.rc.code) {
3647 case SUCCESS:
3648 break;
3649 case PARTIALSUCCESS:
3650 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3651 *req_value,
28f4d165 3652 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 3653 number), name);
e7913803
JA		 3654
3655 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3656 REQ_MTU) {
3657 pr_err("mtu of %llu is not supported. Reverting.\n",
3658 *req_value);
3659 *req_value = adapter->fallback.mtu;
3660 } else {
3661 *req_value =
3662 be64_to_cpu(crq->request_capability_rsp.number);
3663 }
3664
d346b9bc 3665 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 3666 return;
3667 default:
3668 dev_err(dev, "Error %d in request cap rsp\n",
3669 crq->request_capability_rsp.rc.code);
3670 return;
3671 }
3672
3673 /* Done receiving requested capabilities, query IP offload support */
901e040a 3674 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 3675 union ibmvnic_crq newcrq;
3676 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3677 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3678 &adapter->ip_offload_buf;
3679
249168ad 3680 adapter->wait_capability = false;
032c5e82
TF		 3681 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3682 buf_sz,
3683 DMA_FROM_DEVICE);
3684
3685 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3686 if (!firmware_has_feature(FW_FEATURE_CMO))
3687 dev_err(dev, "Couldn't map offload buffer\n");
3688 return;
3689 }
3690
3691 memset(&newcrq, 0, sizeof(newcrq));
3692 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3693 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3694 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3695 newcrq.query_ip_offload.ioba =
3696 cpu_to_be32(adapter->ip_offload_tok);
3697
3698 ibmvnic_send_crq(adapter, &newcrq);
3699 }
3700}
3701
3702static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3703 struct ibmvnic_adapter *adapter)
3704{
3705 struct device *dev = &adapter->vdev->dev;
c26eba03 3706 struct net_device *netdev = adapter->netdev;
032c5e82
TF		 3707 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3708 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 3709 int i;
3710
3711 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3712 DMA_BIDIRECTIONAL);
3713 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3714 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3715
498cd8e4
JA		 3716 /* If the number of queues requested can't be allocated by the
3717 * server, the login response will return with code 1. We will need
3718 * to resend the login buffer with fewer queues requested.
3719 */
3720 if (login_rsp_crq->generic.rc.code) {
3721 adapter->renegotiate = true;
3722 complete(&adapter->init_done);
3723 return 0;
3724 }
3725
c26eba03
JA		 3726 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3727
032c5e82
TF		 3728 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3729 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3730 netdev_dbg(adapter->netdev, "%016lx\n",
3731 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3732 }
3733
3734 /* Sanity checks */
3735 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3736 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3737 adapter->req_rx_add_queues !=
3738 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3739 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3740 ibmvnic_remove(adapter->vdev);
3741 return -EIO;
3742 }
3743 complete(&adapter->init_done);
3744
032c5e82
TF		 3745 return 0;
3746}
3747
032c5e82
TF		 3748static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3749 struct ibmvnic_adapter *adapter)
3750{
3751 struct device *dev = &adapter->vdev->dev;
3752 long rc;
3753
3754 rc = crq->request_unmap_rsp.rc.code;
3755 if (rc)
3756 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3757}
3758
3759static void handle_query_map_rsp(union ibmvnic_crq *crq,
3760 struct ibmvnic_adapter *adapter)
3761{
3762 struct net_device *netdev = adapter->netdev;
3763 struct device *dev = &adapter->vdev->dev;
3764 long rc;
3765
3766 rc = crq->query_map_rsp.rc.code;
3767 if (rc) {
3768 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3769 return;
3770 }
3771 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3772 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3773 crq->query_map_rsp.free_pages);
3774}
3775
3776static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3777 struct ibmvnic_adapter *adapter)
3778{
3779 struct net_device *netdev = adapter->netdev;
3780 struct device *dev = &adapter->vdev->dev;
3781 long rc;
3782
901e040a 3783 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3784 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3785 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3786 rc = crq->query_capability.rc.code;
3787 if (rc) {
3788 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3789 goto out;
3790 }
3791
3792 switch (be16_to_cpu(crq->query_capability.capability)) {
3793 case MIN_TX_QUEUES:
3794 adapter->min_tx_queues =
de89e854 3795 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3796 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3797 adapter->min_tx_queues);
3798 break;
3799 case MIN_RX_QUEUES:
3800 adapter->min_rx_queues =
de89e854 3801 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3802 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3803 adapter->min_rx_queues);
3804 break;
3805 case MIN_RX_ADD_QUEUES:
3806 adapter->min_rx_add_queues =
de89e854 3807 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3808 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3809 adapter->min_rx_add_queues);
3810 break;
3811 case MAX_TX_QUEUES:
3812 adapter->max_tx_queues =
de89e854 3813 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3814 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3815 adapter->max_tx_queues);
3816 break;
3817 case MAX_RX_QUEUES:
3818 adapter->max_rx_queues =
de89e854 3819 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3820 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3821 adapter->max_rx_queues);
3822 break;
3823 case MAX_RX_ADD_QUEUES:
3824 adapter->max_rx_add_queues =
de89e854 3825 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3826 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3827 adapter->max_rx_add_queues);
3828 break;
3829 case MIN_TX_ENTRIES_PER_SUBCRQ:
3830 adapter->min_tx_entries_per_subcrq =
de89e854 3831 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3832 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3833 adapter->min_tx_entries_per_subcrq);
3834 break;
3835 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3836 adapter->min_rx_add_entries_per_subcrq =
de89e854 3837 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3838 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3839 adapter->min_rx_add_entries_per_subcrq);
3840 break;
3841 case MAX_TX_ENTRIES_PER_SUBCRQ:
3842 adapter->max_tx_entries_per_subcrq =
de89e854 3843 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3844 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3845 adapter->max_tx_entries_per_subcrq);
3846 break;
3847 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3848 adapter->max_rx_add_entries_per_subcrq =
de89e854 3849 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3850 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3851 adapter->max_rx_add_entries_per_subcrq);
3852 break;
3853 case TCP_IP_OFFLOAD:
3854 adapter->tcp_ip_offload =
de89e854 3855 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3856 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3857 adapter->tcp_ip_offload);
3858 break;
3859 case PROMISC_SUPPORTED:
3860 adapter->promisc_supported =
de89e854 3861 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3862 netdev_dbg(netdev, "promisc_supported = %lld\n",
3863 adapter->promisc_supported);
3864 break;
3865 case MIN_MTU:
de89e854 3866 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3867 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3868 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3869 break;
3870 case MAX_MTU:
de89e854 3871 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3872 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3873 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3874 break;
3875 case MAX_MULTICAST_FILTERS:
3876 adapter->max_multicast_filters =
de89e854 3877 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3878 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3879 adapter->max_multicast_filters);
3880 break;
3881 case VLAN_HEADER_INSERTION:
3882 adapter->vlan_header_insertion =
de89e854 3883 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3884 if (adapter->vlan_header_insertion)
3885 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3886 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3887 adapter->vlan_header_insertion);
3888 break;
6052d5e2
MFV		 3889 case RX_VLAN_HEADER_INSERTION:
3890 adapter->rx_vlan_header_insertion =
3891 be64_to_cpu(crq->query_capability.number);
3892 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3893 adapter->rx_vlan_header_insertion);
3894 break;
032c5e82
TF		 3895 case MAX_TX_SG_ENTRIES:
3896 adapter->max_tx_sg_entries =
de89e854 3897 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3898 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3899 adapter->max_tx_sg_entries);
3900 break;
3901 case RX_SG_SUPPORTED:
3902 adapter->rx_sg_supported =
de89e854 3903 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3904 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3905 adapter->rx_sg_supported);
3906 break;
3907 case OPT_TX_COMP_SUB_QUEUES:
3908 adapter->opt_tx_comp_sub_queues =
de89e854 3909 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3910 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3911 adapter->opt_tx_comp_sub_queues);
3912 break;
3913 case OPT_RX_COMP_QUEUES:
3914 adapter->opt_rx_comp_queues =
de89e854 3915 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3916 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3917 adapter->opt_rx_comp_queues);
3918 break;
3919 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3920 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3921 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3922 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3923 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3924 break;
3925 case OPT_TX_ENTRIES_PER_SUBCRQ:
3926 adapter->opt_tx_entries_per_subcrq =
de89e854 3927 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3928 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3929 adapter->opt_tx_entries_per_subcrq);
3930 break;
3931 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3932 adapter->opt_rxba_entries_per_subcrq =
de89e854 3933 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3934 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3935 adapter->opt_rxba_entries_per_subcrq);
3936 break;
3937 case TX_RX_DESC_REQ:
3938 adapter->tx_rx_desc_req = crq->query_capability.number;
3939 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3940 adapter->tx_rx_desc_req);
3941 break;
3942
3943 default:
3944 netdev_err(netdev, "Got invalid cap rsp %d\n",
3945 crq->query_capability.capability);
3946 }
3947
3948out:
249168ad
TF		 3949 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3950 adapter->wait_capability = false;
d346b9bc 3951 ibmvnic_send_req_caps(adapter, 0);
249168ad 3952 }
032c5e82
TF		 3953}
3954
032c5e82
TF		 3955static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3956 struct ibmvnic_adapter *adapter)
3957{
3958 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3959 struct net_device *netdev = adapter->netdev;
3960 struct device *dev = &adapter->vdev->dev;
993a82b0 3961 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3962 long rc;
3963
3964 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3965 (unsigned long int)cpu_to_be64(u64_crq[0]),
3966 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3967 switch (gen_crq->first) {
3968 case IBMVNIC_CRQ_INIT_RSP:
3969 switch (gen_crq->cmd) {
3970 case IBMVNIC_CRQ_INIT:
3971 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3972 adapter->from_passive_init = true;
3973 complete(&adapter->init_done);
032c5e82
TF		 3974 break;
3975 case IBMVNIC_CRQ_INIT_COMPLETE:
3976 dev_info(dev, "Partner initialization complete\n");
3977 send_version_xchg(adapter);
3978 break;
3979 default:
3980 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3981 }
3982 return;
3983 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3984 netif_carrier_off(netdev);
032c5e82 3985 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3986 dev_info(dev, "Migrated, re-enabling adapter\n");
3987 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3988 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3989 dev_info(dev, "Backing device failover detected\n");
ed651a10 3990 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3991 } else {
3992 /* The adapter lost the connection */
3993 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3994 gen_crq->cmd);
ed651a10 3995 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3996 }
3997 return;
3998 case IBMVNIC_CRQ_CMD_RSP:
3999 break;
4000 default:
4001 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4002 gen_crq->first);
4003 return;
4004 }
4005
4006 switch (gen_crq->cmd) {
4007 case VERSION_EXCHANGE_RSP:
4008 rc = crq->version_exchange_rsp.rc.code;
4009 if (rc) {
4010 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4011 break;
4012 }
4013 dev_info(dev, "Partner protocol version is %d\n",
4014 crq->version_exchange_rsp.version);
4015 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4016 ibmvnic_version)
4017 ibmvnic_version =
4018 be16_to_cpu(crq->version_exchange_rsp.version);
4019 send_cap_queries(adapter);
4020 break;
4021 case QUERY_CAPABILITY_RSP:
4022 handle_query_cap_rsp(crq, adapter);
4023 break;
4024 case QUERY_MAP_RSP:
4025 handle_query_map_rsp(crq, adapter);
4026 break;
4027 case REQUEST_MAP_RSP:
f3be0cbc
TF		 4028 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4029 complete(&adapter->fw_done);
032c5e82
TF		 4030 break;
4031 case REQUEST_UNMAP_RSP:
4032 handle_request_unmap_rsp(crq, adapter);
4033 break;
4034 case REQUEST_CAPABILITY_RSP:
4035 handle_request_cap_rsp(crq, adapter);
4036 break;
4037 case LOGIN_RSP:
4038 netdev_dbg(netdev, "Got Login Response\n");
4039 handle_login_rsp(crq, adapter);
4040 break;
4041 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 4042 netdev_dbg(netdev,
4043 "Got Logical Link State Response, state: %d rc: %d\n",
4044 crq->logical_link_state_rsp.link_state,
4045 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 4046 adapter->logical_link_state =
4047 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 4048 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4049 complete(&adapter->init_done);
032c5e82
TF		 4050 break;
4051 case LINK_STATE_INDICATION:
4052 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4053 adapter->phys_link_state =
4054 crq->link_state_indication.phys_link_state;
4055 adapter->logical_link_state =
4056 crq->link_state_indication.logical_link_state;
4057 break;
4058 case CHANGE_MAC_ADDR_RSP:
4059 netdev_dbg(netdev, "Got MAC address change Response\n");
f813614f 4060 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
032c5e82
TF		 4061 break;
4062 case ERROR_INDICATION:
4063 netdev_dbg(netdev, "Got Error Indication\n");
4064 handle_error_indication(crq, adapter);
4065 break;
4066 case REQUEST_ERROR_RSP:
4067 netdev_dbg(netdev, "Got Error Detail Response\n");
4068 handle_error_info_rsp(crq, adapter);
4069 break;
4070 case REQUEST_STATISTICS_RSP:
4071 netdev_dbg(netdev, "Got Statistics Response\n");
4072 complete(&adapter->stats_done);
4073 break;
032c5e82
TF		 4074 case QUERY_IP_OFFLOAD_RSP:
4075 netdev_dbg(netdev, "Got Query IP offload Response\n");
4076 handle_query_ip_offload_rsp(adapter);
4077 break;
4078 case MULTICAST_CTRL_RSP:
4079 netdev_dbg(netdev, "Got multicast control Response\n");
4080 break;
4081 case CONTROL_IP_OFFLOAD_RSP:
4082 netdev_dbg(netdev, "Got Control IP offload Response\n");
4083 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4084 sizeof(adapter->ip_offload_ctrl),
4085 DMA_TO_DEVICE);
bd0b6723 4086 complete(&adapter->init_done);
032c5e82 4087 break;
032c5e82
TF		 4088 case COLLECT_FW_TRACE_RSP:
4089 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4090 complete(&adapter->fw_done);
4091 break;
4e6759be
DANR		 4092 case GET_VPD_SIZE_RSP:
4093 handle_vpd_size_rsp(crq, adapter);
4094 break;
4095 case GET_VPD_RSP:
4096 handle_vpd_rsp(crq, adapter);
4097 break;
032c5e82
TF		 4098 default:
4099 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4100 gen_crq->cmd);
4101 }
4102}
4103
4104static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4105{
4106 struct ibmvnic_adapter *adapter = instance;
6c267b3d 4107
6c267b3d 4108 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 4109 return IRQ_HANDLED;
4110}
4111
4112static void ibmvnic_tasklet(void *data)
4113{
4114 struct ibmvnic_adapter *adapter = data;
032c5e82 4115 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 4116 union ibmvnic_crq *crq;
4117 unsigned long flags;
4118 bool done = false;
4119
4120 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 4121 while (!done) {
4122 /* Pull all the valid messages off the CRQ */
4123 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4124 ibmvnic_handle_crq(crq, adapter);
4125 crq->generic.first = 0;
4126 }
ed7ecbf7
BK		 4127
4128 /* remain in tasklet until all
4129 * capabilities responses are received
4130 */
4131 if (!adapter->wait_capability)
4132 done = true;
032c5e82 4133 }
249168ad
TF		 4134 /* if capabilities CRQ's were sent in this tasklet, the following
4135 * tasklet must wait until all responses are received
4136 */
4137 if (atomic_read(&adapter->running_cap_crqs) != 0)
4138 adapter->wait_capability = true;
032c5e82 4139 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 4140}
4141
4142static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4143{
4144 struct vio_dev *vdev = adapter->vdev;
4145 int rc;
4146
4147 do {
4148 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4149 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4150
4151 if (rc)
4152 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4153
4154 return rc;
4155}
4156
4157static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4158{
4159 struct ibmvnic_crq_queue *crq = &adapter->crq;
4160 struct device *dev = &adapter->vdev->dev;
4161 struct vio_dev *vdev = adapter->vdev;
4162 int rc;
4163
4164 /* Close the CRQ */
4165 do {
4166 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4167 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4168
4169 /* Clean out the queue */
4170 memset(crq->msgs, 0, PAGE_SIZE);
4171 crq->cur = 0;
4172
4173 /* And re-open it again */
4174 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4175 crq->msg_token, PAGE_SIZE);
4176
4177 if (rc == H_CLOSED)
4178 /* Adapter is good, but other end is not ready */
4179 dev_warn(dev, "Partner adapter not ready\n");
4180 else if (rc != 0)
4181 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4182
4183 return rc;
4184}
4185
f992887c 4186static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4187{
4188 struct ibmvnic_crq_queue *crq = &adapter->crq;
4189 struct vio_dev *vdev = adapter->vdev;
4190 long rc;
4191
f992887c
NF		 4192 if (!crq->msgs)
4193 return;
4194
032c5e82
TF		 4195 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4196 free_irq(vdev->irq, adapter);
6c267b3d 4197 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4198 do {
4199 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4200 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4201
4202 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4203 DMA_BIDIRECTIONAL);
4204 free_page((unsigned long)crq->msgs);
f992887c 4205 crq->msgs = NULL;
032c5e82
TF		 4206}
4207
f992887c 4208static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4209{
4210 struct ibmvnic_crq_queue *crq = &adapter->crq;
4211 struct device *dev = &adapter->vdev->dev;
4212 struct vio_dev *vdev = adapter->vdev;
4213 int rc, retrc = -ENOMEM;
4214
f992887c
NF		 4215 if (crq->msgs)
4216 return 0;
4217
032c5e82
TF		 4218 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4219 /* Should we allocate more than one page? */
4220
4221 if (!crq->msgs)
4222 return -ENOMEM;
4223
4224 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4225 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4226 DMA_BIDIRECTIONAL);
4227 if (dma_mapping_error(dev, crq->msg_token))
4228 goto map_failed;
4229
4230 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4231 crq->msg_token, PAGE_SIZE);
4232
4233 if (rc == H_RESOURCE)
4234 /* maybe kexecing and resource is busy. try a reset */
4235 rc = ibmvnic_reset_crq(adapter);
4236 retrc = rc;
4237
4238 if (rc == H_CLOSED) {
4239 dev_warn(dev, "Partner adapter not ready\n");
4240 } else if (rc) {
4241 dev_warn(dev, "Error %d opening adapter\n", rc);
4242 goto reg_crq_failed;
4243 }
4244
4245 retrc = 0;
4246
6c267b3d
TF		 4247 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4248 (unsigned long)adapter);
4249
032c5e82
TF		 4250 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4251 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4252 adapter);
4253 if (rc) {
4254 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4255 vdev->irq, rc);
4256 goto req_irq_failed;
4257 }
4258
4259 rc = vio_enable_interrupts(vdev);
4260 if (rc) {
4261 dev_err(dev, "Error %d enabling interrupts\n", rc);
4262 goto req_irq_failed;
4263 }
4264
4265 crq->cur = 0;
4266 spin_lock_init(&crq->lock);
4267
4268 return retrc;
4269
4270req_irq_failed:
6c267b3d 4271 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4272 do {
4273 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4274 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4275reg_crq_failed:
4276 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4277map_failed:
4278 free_page((unsigned long)crq->msgs);
f992887c 4279 crq->msgs = NULL;
032c5e82
TF		 4280 return retrc;
4281}
4282
f6ef6408 4283static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 4284{
f6ef6408 4285 struct device *dev = &adapter->vdev->dev;
ea22d51a 4286 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 4287 int rc;
4288
c26eba03 4289 if (adapter->resetting && !adapter->wait_for_reset) {
28cde751
NF		 4290 rc = ibmvnic_reset_crq(adapter);
4291 if (!rc)
4292 rc = vio_enable_interrupts(adapter->vdev);
4293 } else {
4294 rc = init_crq_queue(adapter);
4295 }
4296
f6ef6408
JA		 4297 if (rc) {
4298 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4299 return rc;
4300 }
4301
017892c1
JA		 4302 adapter->from_passive_init = false;
4303
f6ef6408 4304 init_completion(&adapter->init_done);
6a2fb0e9 4305 adapter->init_done_rc = 0;
f6ef6408
JA		 4306 ibmvnic_send_crq_init(adapter);
4307 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4308 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 4309 return -1;
4310 }
4311
6a2fb0e9
NF		 4312 if (adapter->init_done_rc) {
4313 release_crq_queue(adapter);
4314 return adapter->init_done_rc;
4315 }
4316
017892c1
JA		 4317 if (adapter->from_passive_init) {
4318 adapter->state = VNIC_OPEN;
4319 adapter->from_passive_init = false;
f6ef6408
JA		 4320 return -1;
4321 }
4322
c26eba03 4323 if (adapter->resetting && !adapter->wait_for_reset)
57a49436
NF		 4324 rc = reset_sub_crq_queues(adapter);
4325 else
4326 rc = init_sub_crqs(adapter);
1bb3c739
NF		 4327 if (rc) {
4328 dev_err(dev, "Initialization of sub crqs failed\n");
4329 release_crq_queue(adapter);
5df969c3
TF		 4330 return rc;
4331 }
4332
4333 rc = init_sub_crq_irqs(adapter);
4334 if (rc) {
4335 dev_err(dev, "Failed to initialize sub crq irqs\n");
4336 release_crq_queue(adapter);
1bb3c739
NF		 4337 }
4338
4339 return rc;
f6ef6408
JA		 4340}
4341
40c9db8a
TF		 4342static struct device_attribute dev_attr_failover;
4343
f6ef6408
JA		 4344static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4345{
032c5e82
TF		 4346 struct ibmvnic_adapter *adapter;
4347 struct net_device *netdev;
4348 unsigned char *mac_addr_p;
032c5e82
TF		 4349 int rc;
4350
4351 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4352 dev->unit_address);
4353
4354 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4355 VETH_MAC_ADDR, NULL);
4356 if (!mac_addr_p) {
4357 dev_err(&dev->dev,
4358 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4359 __FILE__, __LINE__);
4360 return 0;
4361 }
4362
4363 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
d45cc3a4 4364 IBMVNIC_MAX_QUEUES);
032c5e82
TF		 4365 if (!netdev)
4366 return -ENOMEM;
4367
4368 adapter = netdev_priv(netdev);
90c8014c 4369 adapter->state = VNIC_PROBING;
032c5e82
TF		 4370 dev_set_drvdata(&dev->dev, netdev);
4371 adapter->vdev = dev;
4372 adapter->netdev = netdev;
4373
4374 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4375 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4376 netdev->irq = dev->irq;
4377 netdev->netdev_ops = &ibmvnic_netdev_ops;
4378 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4379 SET_NETDEV_DEV(netdev, &dev->dev);
4380
4381 spin_lock_init(&adapter->stats_lock);
4382
032c5e82 4383 INIT_LIST_HEAD(&adapter->errors);
032c5e82 4384 spin_lock_init(&adapter->error_list_lock);
032c5e82 4385
ed651a10
NF		 4386 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4387 INIT_LIST_HEAD(&adapter->rwi_list);
4388 mutex_init(&adapter->reset_lock);
4389 mutex_init(&adapter->rwi_lock);
4390 adapter->resetting = false;
4391
c26eba03
JA		 4392 adapter->mac_change_pending = false;
4393
6a2fb0e9
NF		 4394 do {
4395 rc = ibmvnic_init(adapter);
7c1885ae
NF		 4396 if (rc && rc != EAGAIN)
4397 goto ibmvnic_init_fail;
6a2fb0e9 4398 } while (rc == EAGAIN);
032c5e82 4399
f39f0d1e 4400 netdev->mtu = adapter->req_mtu - ETH_HLEN;
c26eba03
JA		 4401 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4402 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82 4403
40c9db8a 4404 rc = device_create_file(&dev->dev, &dev_attr_failover);
7c1885ae
NF		 4405 if (rc)
4406 goto ibmvnic_init_fail;
40c9db8a 4407
e876a8a7 4408 netif_carrier_off(netdev);
032c5e82
TF		 4409 rc = register_netdev(netdev);
4410 if (rc) {
4411 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
7c1885ae 4412 goto ibmvnic_register_fail;
032c5e82
TF		 4413 }
4414 dev_info(&dev->dev, "ibmvnic registered\n");
4415
90c8014c 4416 adapter->state = VNIC_PROBED;
c26eba03
JA		 4417
4418 adapter->wait_for_reset = false;
4419
032c5e82 4420 return 0;
7c1885ae
NF		 4421
4422ibmvnic_register_fail:
4423 device_remove_file(&dev->dev, &dev_attr_failover);
4424
4425ibmvnic_init_fail:
4426 release_sub_crqs(adapter);
4427 release_crq_queue(adapter);
4428 free_netdev(netdev);
4429
4430 return rc;
032c5e82
TF		 4431}
4432
4433static int ibmvnic_remove(struct vio_dev *dev)
4434{
4435 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 4436 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4437
90c8014c 4438 adapter->state = VNIC_REMOVING;
032c5e82 4439 unregister_netdev(netdev);
ed651a10 4440 mutex_lock(&adapter->reset_lock);
37489055
NF		 4441
4442 release_resources(adapter);
4443 release_sub_crqs(adapter);
4444 release_crq_queue(adapter);
4445
90c8014c
NF		 4446 adapter->state = VNIC_REMOVED;
4447
ed651a10 4448 mutex_unlock(&adapter->reset_lock);
40c9db8a 4449 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 4450 free_netdev(netdev);
4451 dev_set_drvdata(&dev->dev, NULL);
4452
4453 return 0;
4454}
4455
40c9db8a
TF		 4456static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4457 const char *buf, size_t count)
4458{
4459 struct net_device *netdev = dev_get_drvdata(dev);
4460 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4461 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4462 __be64 session_token;
4463 long rc;
4464
4465 if (!sysfs_streq(buf, "1"))
4466 return -EINVAL;
4467
4468 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4469 H_GET_SESSION_TOKEN, 0, 0, 0);
4470 if (rc) {
4471 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4472 rc);
4473 return -EINVAL;
4474 }
4475
4476 session_token = (__be64)retbuf[0];
4477 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4478 be64_to_cpu(session_token));
4479 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4480 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4481 if (rc) {
4482 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4483 rc);
4484 return -EINVAL;
4485 }
4486
4487 return count;
4488}
4489
6cbaefb4 4490static DEVICE_ATTR_WO(failover);
40c9db8a 4491
032c5e82
TF		 4492static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4493{
4494 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4495 struct ibmvnic_adapter *adapter;
4496 struct iommu_table *tbl;
4497 unsigned long ret = 0;
4498 int i;
4499
4500 tbl = get_iommu_table_base(&vdev->dev);
4501
4502 /* netdev inits at probe time along with the structures we need below*/
4503 if (!netdev)
4504 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4505
4506 adapter = netdev_priv(netdev);
4507
4508 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 4509 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4510
4511 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4512 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4513
4514 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4515 i++)
4516 ret += adapter->rx_pool[i].size *
4517 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4518
4519 return ret;
4520}
4521
4522static int ibmvnic_resume(struct device *dev)
4523{
4524 struct net_device *netdev = dev_get_drvdata(dev);
4525 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4526
cb89ba24
JA		 4527 if (adapter->state != VNIC_OPEN)
4528 return 0;
4529
a248878d 4530 tasklet_schedule(&adapter->tasklet);
032c5e82
TF		 4531
4532 return 0;
4533}
4534
8c37bc67 4535static const struct vio_device_id ibmvnic_device_table[] = {
032c5e82
TF		 4536 {"network", "IBM,vnic"},
4537 {"", "" }
4538};
4539MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4540
4541static const struct dev_pm_ops ibmvnic_pm_ops = {
4542 .resume = ibmvnic_resume
4543};
4544
4545static struct vio_driver ibmvnic_driver = {
4546 .id_table = ibmvnic_device_table,
4547 .probe = ibmvnic_probe,
4548 .remove = ibmvnic_remove,
4549 .get_desired_dma = ibmvnic_get_desired_dma,
4550 .name = ibmvnic_driver_name,
4551 .pm = &ibmvnic_pm_ops,
4552};
4553
4554/* module functions */
4555static int __init ibmvnic_module_init(void)
4556{
4557 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4558 IBMVNIC_DRIVER_VERSION);
4559
4560 return vio_register_driver(&ibmvnic_driver);
4561}
4562
4563static void __exit ibmvnic_module_exit(void)
4564{
4565 vio_unregister_driver(&ibmvnic_driver);
4566}
4567
4568module_init(ibmvnic_module_init);
4569module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)