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Merge branch 'stmmac-barrier-fixes-and-cleanup'
[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 *);
d7c0ef36 93static void release_sub_crqs(struct ibmvnic_adapter *, bool);
032c5e82
TF		 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 =
abcae546 364 kcalloc(IBMVNIC_MAX_QUEUES,
3d52b594
JA		 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 =
abcae546 371 kcalloc(IBMVNIC_MAX_QUEUES,
3d52b594
JA		 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
82e3be32 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;
82e3be32 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
82e3be32
NF		 512 adapter->num_active_rx_pools = rxadd_subcrqs;
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
NF		 556
557 return 0;
032c5e82
TF		 558}
559
8c0543ad
NF		 560static int reset_tx_pools(struct ibmvnic_adapter *adapter)
561{
562 struct ibmvnic_tx_pool *tx_pool;
563 int tx_scrqs;
f3be0cbc 564 int i, j, rc;
8c0543ad
NF		 565
566 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
567 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9
NF		 568 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
569
8c0543ad
NF		 570 tx_pool = &adapter->tx_pool[i];
571
f3be0cbc
TF		 572 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
573 if (rc)
574 return rc;
8c0543ad 575
fdb06105
TF		 576 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
577 if (rc)
578 return rc;
579
8c0543ad
NF		 580 memset(tx_pool->tx_buff, 0,
581 adapter->req_tx_entries_per_subcrq *
582 sizeof(struct ibmvnic_tx_buff));
583
584 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
585 tx_pool->free_map[j] = j;
586
587 tx_pool->consumer_index = 0;
588 tx_pool->producer_index = 0;
fdb06105 589 tx_pool->tso_index = 0;
8c0543ad
NF		 590 }
591
592 return 0;
593}
594
4e6759be
DANR		 595static void release_vpd_data(struct ibmvnic_adapter *adapter)
596{
597 if (!adapter->vpd)
598 return;
599
600 kfree(adapter->vpd->buff);
601 kfree(adapter->vpd);
b0992eca
TF		 602
603 adapter->vpd = NULL;
4e6759be
DANR		 604}
605
c657e32c
NF		 606static void release_tx_pools(struct ibmvnic_adapter *adapter)
607{
608 struct ibmvnic_tx_pool *tx_pool;
896d8695 609 int i;
c657e32c
NF		 610
611 if (!adapter->tx_pool)
612 return;
613
82e3be32 614 for (i = 0; i < adapter->num_active_tx_pools; i++) {
d1cf33d9 615 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
c657e32c
NF		 616 tx_pool = &adapter->tx_pool[i];
617 kfree(tx_pool->tx_buff);
618 free_long_term_buff(adapter, &tx_pool->long_term_buff);
fdb06105 619 free_long_term_buff(adapter, &tx_pool->tso_ltb);
c657e32c
NF		 620 kfree(tx_pool->free_map);
621 }
622
623 kfree(adapter->tx_pool);
624 adapter->tx_pool = NULL;
82e3be32 625 adapter->num_active_tx_pools = 0;
c657e32c
NF		 626}
627
628static int init_tx_pools(struct net_device *netdev)
629{
630 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
631 struct device *dev = &adapter->vdev->dev;
632 struct ibmvnic_tx_pool *tx_pool;
633 int tx_subcrqs;
634 int i, j;
635
636 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
637 adapter->tx_pool = kcalloc(tx_subcrqs,
638 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
639 if (!adapter->tx_pool)
640 return -1;
641
82e3be32
NF		 642 adapter->num_active_tx_pools = tx_subcrqs;
643
c657e32c
NF		 644 for (i = 0; i < tx_subcrqs; i++) {
645 tx_pool = &adapter->tx_pool[i];
d1cf33d9
NF		 646
647 netdev_dbg(adapter->netdev,
648 "Initializing tx_pool[%d], %lld buffs\n",
649 i, adapter->req_tx_entries_per_subcrq);
650
c657e32c
NF		 651 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
652 sizeof(struct ibmvnic_tx_buff),
653 GFP_KERNEL);
654 if (!tx_pool->tx_buff) {
655 dev_err(dev, "tx pool buffer allocation failed\n");
656 release_tx_pools(adapter);
657 return -1;
658 }
659
660 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
661 adapter->req_tx_entries_per_subcrq *
662 adapter->req_mtu)) {
663 release_tx_pools(adapter);
664 return -1;
665 }
666
fdb06105
TF		 667 /* alloc TSO ltb */
668 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
669 IBMVNIC_TSO_BUFS *
670 IBMVNIC_TSO_BUF_SZ)) {
671 release_tx_pools(adapter);
672 return -1;
673 }
674
675 tx_pool->tso_index = 0;
676
c657e32c
NF		 677 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
678 sizeof(int), GFP_KERNEL);
679 if (!tx_pool->free_map) {
680 release_tx_pools(adapter);
681 return -1;
682 }
683
684 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
685 tx_pool->free_map[j] = j;
686
687 tx_pool->consumer_index = 0;
688 tx_pool->producer_index = 0;
689 }
690
691 return 0;
692}
693
661a2622
NF		 694static void release_error_buffers(struct ibmvnic_adapter *adapter)
695{
696 struct device *dev = &adapter->vdev->dev;
697 struct ibmvnic_error_buff *error_buff, *tmp;
698 unsigned long flags;
699
700 spin_lock_irqsave(&adapter->error_list_lock, flags);
701 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
702 list_del(&error_buff->list);
703 dma_unmap_single(dev, error_buff->dma, error_buff->len,
704 DMA_FROM_DEVICE);
705 kfree(error_buff->buff);
706 kfree(error_buff);
707 }
708 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
709}
710
d944c3d6
JA		 711static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
712{
713 int i;
714
715 if (adapter->napi_enabled)
716 return;
717
718 for (i = 0; i < adapter->req_rx_queues; i++)
719 napi_enable(&adapter->napi[i]);
720
721 adapter->napi_enabled = true;
722}
723
724static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
725{
726 int i;
727
728 if (!adapter->napi_enabled)
729 return;
730
d1cf33d9
NF		 731 for (i = 0; i < adapter->req_rx_queues; i++) {
732 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
d944c3d6 733 napi_disable(&adapter->napi[i]);
d1cf33d9 734 }
d944c3d6
JA		 735
736 adapter->napi_enabled = false;
737}
738
86f669b2
NF		 739static int init_napi(struct ibmvnic_adapter *adapter)
740{
741 int i;
742
743 adapter->napi = kcalloc(adapter->req_rx_queues,
744 sizeof(struct napi_struct), GFP_KERNEL);
745 if (!adapter->napi)
746 return -ENOMEM;
747
748 for (i = 0; i < adapter->req_rx_queues; i++) {
749 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
750 netif_napi_add(adapter->netdev, &adapter->napi[i],
751 ibmvnic_poll, NAPI_POLL_WEIGHT);
752 }
753
82e3be32 754 adapter->num_active_rx_napi = adapter->req_rx_queues;
86f669b2
NF		 755 return 0;
756}
757
758static void release_napi(struct ibmvnic_adapter *adapter)
759{
760 int i;
761
762 if (!adapter->napi)
763 return;
764
82e3be32 765 for (i = 0; i < adapter->num_active_rx_napi; i++) {
86f669b2
NF		 766 if (&adapter->napi[i]) {
767 netdev_dbg(adapter->netdev,
768 "Releasing napi[%d]\n", i);
769 netif_napi_del(&adapter->napi[i]);
770 }
771 }
772
773 kfree(adapter->napi);
774 adapter->napi = NULL;
82e3be32 775 adapter->num_active_rx_napi = 0;
86f669b2
NF		 776}
777
a57a5d25 778static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 779{
780 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 781 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 782 struct device *dev = &adapter->vdev->dev;
4d96f12a 783 int rc;
032c5e82 784
bd0b6723
JA		 785 do {
786 if (adapter->renegotiate) {
787 adapter->renegotiate = false;
d7c0ef36 788 release_sub_crqs(adapter, 1);
bd0b6723
JA		 789
790 reinit_completion(&adapter->init_done);
791 send_cap_queries(adapter);
792 if (!wait_for_completion_timeout(&adapter->init_done,
793 timeout)) {
794 dev_err(dev, "Capabilities query timeout\n");
795 return -1;
796 }
4d96f12a
TF		 797 rc = init_sub_crqs(adapter);
798 if (rc) {
799 dev_err(dev,
800 "Initialization of SCRQ's failed\n");
801 return -1;
802 }
803 rc = init_sub_crq_irqs(adapter);
804 if (rc) {
805 dev_err(dev,
806 "Initialization of SCRQ's irqs failed\n");
807 return -1;
808 }
bd0b6723
JA		 809 }
810
811 reinit_completion(&adapter->init_done);
812 send_login(adapter);
813 if (!wait_for_completion_timeout(&adapter->init_done,
814 timeout)) {
815 dev_err(dev, "Login timeout\n");
816 return -1;
817 }
818 } while (adapter->renegotiate);
819
3d166130
TF		 820 /* handle pending MAC address changes after successful login */
821 if (adapter->mac_change_pending) {
822 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
823 adapter->mac_change_pending = false;
824 }
825
a57a5d25
JA		 826 return 0;
827}
828
34f0f4e3
TF		 829static void release_login_buffer(struct ibmvnic_adapter *adapter)
830{
831 kfree(adapter->login_buf);
832 adapter->login_buf = NULL;
833}
834
835static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
836{
837 kfree(adapter->login_rsp_buf);
838 adapter->login_rsp_buf = NULL;
839}
840
1b8955ee
NF		 841static void release_resources(struct ibmvnic_adapter *adapter)
842{
4e6759be
DANR		 843 release_vpd_data(adapter);
844
1b8955ee
NF		 845 release_tx_pools(adapter);
846 release_rx_pools(adapter);
847
1b8955ee 848 release_stats_token(adapter);
3d52b594 849 release_stats_buffers(adapter);
661a2622 850 release_error_buffers(adapter);
86f669b2 851 release_napi(adapter);
34f0f4e3 852 release_login_rsp_buffer(adapter);
1b8955ee
NF		 853}
854
53da09e9
NF		 855static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
856{
857 struct net_device *netdev = adapter->netdev;
858 unsigned long timeout = msecs_to_jiffies(30000);
859 union ibmvnic_crq crq;
860 bool resend;
861 int rc;
862
d1cf33d9
NF		 863 netdev_dbg(netdev, "setting link state %d\n", link_state);
864
53da09e9
NF		 865 memset(&crq, 0, sizeof(crq));
866 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
867 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
868 crq.logical_link_state.link_state = link_state;
869
870 do {
871 resend = false;
872
873 reinit_completion(&adapter->init_done);
874 rc = ibmvnic_send_crq(adapter, &crq);
875 if (rc) {
876 netdev_err(netdev, "Failed to set link state\n");
877 return rc;
878 }
879
880 if (!wait_for_completion_timeout(&adapter->init_done,
881 timeout)) {
882 netdev_err(netdev, "timeout setting link state\n");
883 return -1;
884 }
885
886 if (adapter->init_done_rc == 1) {
887 /* Partuial success, delay and re-send */
888 mdelay(1000);
889 resend = true;
890 }
891 } while (resend);
892
893 return 0;
894}
895
7f3c6e6b
TF		 896static int set_real_num_queues(struct net_device *netdev)
897{
898 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
899 int rc;
900
d1cf33d9
NF		 901 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
902 adapter->req_tx_queues, adapter->req_rx_queues);
903
7f3c6e6b
TF		 904 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
905 if (rc) {
906 netdev_err(netdev, "failed to set the number of tx queues\n");
907 return rc;
908 }
909
910 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
911 if (rc)
912 netdev_err(netdev, "failed to set the number of rx queues\n");
913
914 return rc;
915}
916
4e6759be
DANR		 917static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
918{
919 struct device *dev = &adapter->vdev->dev;
920 union ibmvnic_crq crq;
4e6759be
DANR		 921 int len = 0;
922
923 if (adapter->vpd->buff)
924 len = adapter->vpd->len;
925
69d08dcb 926 init_completion(&adapter->fw_done);
4e6759be
DANR		 927 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
928 crq.get_vpd_size.cmd = GET_VPD_SIZE;
929 ibmvnic_send_crq(adapter, &crq);
930 wait_for_completion(&adapter->fw_done);
931
932 if (!adapter->vpd->len)
933 return -ENODATA;
934
935 if (!adapter->vpd->buff)
936 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
937 else if (adapter->vpd->len != len)
938 adapter->vpd->buff =
939 krealloc(adapter->vpd->buff,
940 adapter->vpd->len, GFP_KERNEL);
941
942 if (!adapter->vpd->buff) {
943 dev_err(dev, "Could allocate VPD buffer\n");
944 return -ENOMEM;
945 }
946
947 adapter->vpd->dma_addr =
948 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
949 DMA_FROM_DEVICE);
f743106e 950 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
4e6759be
DANR		 951 dev_err(dev, "Could not map VPD buffer\n");
952 kfree(adapter->vpd->buff);
b0992eca 953 adapter->vpd->buff = NULL;
4e6759be
DANR		 954 return -ENOMEM;
955 }
956
957 reinit_completion(&adapter->fw_done);
958 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
959 crq.get_vpd.cmd = GET_VPD;
960 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
961 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
962 ibmvnic_send_crq(adapter, &crq);
963 wait_for_completion(&adapter->fw_done);
964
965 return 0;
966}
967
bfc32f29 968static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 969{
bfc32f29 970 struct net_device *netdev = adapter->netdev;
86f669b2 971 int rc;
a57a5d25 972
7f3c6e6b
TF		 973 rc = set_real_num_queues(netdev);
974 if (rc)
975 return rc;
bd0b6723 976
3d52b594
JA		 977 rc = init_stats_buffers(adapter);
978 if (rc)
979 return rc;
980
5d5e84eb
NF		 981 rc = init_stats_token(adapter);
982 if (rc)
983 return rc;
984
4e6759be
DANR		 985 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
986 if (!adapter->vpd)
987 return -ENOMEM;
988
69d08dcb
JA		 989 /* Vital Product Data (VPD) */
990 rc = ibmvnic_get_vpd(adapter);
991 if (rc) {
992 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
993 return rc;
994 }
995
032c5e82 996 adapter->map_id = 1;
bfc32f29 997
86f669b2
NF		 998 rc = init_napi(adapter);
999 if (rc)
1000 return rc;
032c5e82 1001
032c5e82 1002 send_map_query(adapter);
0ffe2cb7
NF		 1003
1004 rc = init_rx_pools(netdev);
1005 if (rc)
bfc32f29 1006 return rc;
032c5e82 1007
c657e32c 1008 rc = init_tx_pools(netdev);
bfc32f29
NF		 1009 return rc;
1010}
1011
ed651a10 1012static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 1013{
1014 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 1015 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 1016 int i, rc;
1017
90c8014c 1018 adapter->state = VNIC_OPENING;
032c5e82 1019 replenish_pools(adapter);
d944c3d6 1020 ibmvnic_napi_enable(adapter);
bfc32f29 1021
032c5e82
TF		 1022 /* We're ready to receive frames, enable the sub-crq interrupts and
1023 * set the logical link state to up
1024 */
ed651a10 1025 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 1026 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
ed651a10
NF		 1027 if (prev_state == VNIC_CLOSED)
1028 enable_irq(adapter->rx_scrq[i]->irq);
1029 else
1030 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1031 }
032c5e82 1032
ed651a10 1033 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 1034 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
ed651a10
NF		 1035 if (prev_state == VNIC_CLOSED)
1036 enable_irq(adapter->tx_scrq[i]->irq);
1037 else
1038 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1039 }
032c5e82 1040
53da09e9 1041 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 1042 if (rc) {
1043 for (i = 0; i < adapter->req_rx_queues; i++)
1044 napi_disable(&adapter->napi[i]);
1045 release_resources(adapter);
ed651a10 1046 return rc;
bfc32f29 1047 }
032c5e82 1048
ed651a10
NF		 1049 netif_tx_start_all_queues(netdev);
1050
1051 if (prev_state == VNIC_CLOSED) {
1052 for (i = 0; i < adapter->req_rx_queues; i++)
1053 napi_schedule(&adapter->napi[i]);
1054 }
1055
1056 adapter->state = VNIC_OPEN;
1057 return rc;
1058}
1059
1060static int ibmvnic_open(struct net_device *netdev)
1061{
1062 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
69d08dcb 1063 int rc;
ed651a10
NF		 1064
1065 mutex_lock(&adapter->reset_lock);
1066
1067 if (adapter->state != VNIC_CLOSED) {
1068 rc = ibmvnic_login(netdev);
1069 if (rc) {
1070 mutex_unlock(&adapter->reset_lock);
1071 return rc;
1072 }
1073
1074 rc = init_resources(adapter);
1075 if (rc) {
1076 netdev_err(netdev, "failed to initialize resources\n");
1077 release_resources(adapter);
1078 mutex_unlock(&adapter->reset_lock);
1079 return rc;
1080 }
1081 }
1082
1083 rc = __ibmvnic_open(netdev);
e876a8a7 1084 netif_carrier_on(netdev);
4e6759be 1085
ed651a10
NF		 1086 mutex_unlock(&adapter->reset_lock);
1087
bfc32f29 1088 return rc;
032c5e82
TF		 1089}
1090
d0869c00
TF		 1091static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1092{
1093 struct ibmvnic_rx_pool *rx_pool;
1094 u64 rx_entries;
1095 int rx_scrqs;
1096 int i, j;
1097
1098 if (!adapter->rx_pool)
1099 return;
1100
1101 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
1102 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1103
1104 /* Free any remaining skbs in the rx buffer pools */
1105 for (i = 0; i < rx_scrqs; i++) {
1106 rx_pool = &adapter->rx_pool[i];
1107 if (!rx_pool)
1108 continue;
1109
1110 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1111 for (j = 0; j < rx_entries; j++) {
1112 if (rx_pool->rx_buff[j].skb) {
1113 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
1114 rx_pool->rx_buff[j].skb = NULL;
1115 }
1116 }
1117 }
1118}
1119
b41b83e9
NF		 1120static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1121{
1122 struct ibmvnic_tx_pool *tx_pool;
1123 u64 tx_entries;
1124 int tx_scrqs;
1125 int i, j;
1126
1127 if (!adapter->tx_pool)
1128 return;
1129
1130 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1131 tx_entries = adapter->req_tx_entries_per_subcrq;
1132
1133 /* Free any remaining skbs in the tx buffer pools */
1134 for (i = 0; i < tx_scrqs; i++) {
1135 tx_pool = &adapter->tx_pool[i];
1136 if (!tx_pool)
1137 continue;
1138
d1cf33d9 1139 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
b41b83e9
NF		 1140 for (j = 0; j < tx_entries; j++) {
1141 if (tx_pool->tx_buff[j].skb) {
1142 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1143 tx_pool->tx_buff[j].skb = NULL;
1144 }
1145 }
1146 }
1147}
1148
ed651a10 1149static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 1150{
1151 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 1152 int rc = 0;
ea5509f5
JA		 1153 int i;
1154
90c8014c 1155 adapter->state = VNIC_CLOSING;
4c2687a5
TF		 1156
1157 /* ensure that transmissions are stopped if called by do_reset */
1158 if (adapter->resetting)
1159 netif_tx_disable(netdev);
1160 else
1161 netif_tx_stop_all_queues(netdev);
1162
d944c3d6 1163 ibmvnic_napi_disable(adapter);
46293b94
NF		 1164
1165 if (adapter->tx_scrq) {
1166 for (i = 0; i < adapter->req_tx_queues; i++)
d1cf33d9
NF		 1167 if (adapter->tx_scrq[i]->irq) {
1168 netdev_dbg(adapter->netdev,
1169 "Disabling tx_scrq[%d] irq\n", i);
46293b94 1170 disable_irq(adapter->tx_scrq[i]->irq);
d1cf33d9 1171 }
46293b94
NF		 1172 }
1173
53da09e9 1174 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 1175 if (rc)
1176 return rc;
1177
1178 if (adapter->rx_scrq) {
1179 for (i = 0; i < adapter->req_rx_queues; i++) {
1180 int retries = 10;
1181
1182 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1183 retries--;
1184 mdelay(100);
1185
1186 if (retries == 0)
1187 break;
1188 }
1189
d1cf33d9
NF		 1190 if (adapter->rx_scrq[i]->irq) {
1191 netdev_dbg(adapter->netdev,
1192 "Disabling rx_scrq[%d] irq\n", i);
46293b94 1193 disable_irq(adapter->rx_scrq[i]->irq);
d1cf33d9 1194 }
46293b94
NF		 1195 }
1196 }
d0869c00 1197 clean_rx_pools(adapter);
10f76215 1198 clean_tx_pools(adapter);
90c8014c 1199 adapter->state = VNIC_CLOSED;
53da09e9 1200 return rc;
032c5e82
TF		 1201}
1202
ed651a10
NF		 1203static int ibmvnic_close(struct net_device *netdev)
1204{
1205 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1206 int rc;
1207
1208 mutex_lock(&adapter->reset_lock);
1209 rc = __ibmvnic_close(netdev);
1210 mutex_unlock(&adapter->reset_lock);
1211
1212 return rc;
1213}
1214
ad7775dc
TF		 1215/**
1216 * build_hdr_data - creates L2/L3/L4 header data buffer
1217 * @hdr_field - bitfield determining needed headers
1218 * @skb - socket buffer
1219 * @hdr_len - array of header lengths
1220 * @tot_len - total length of data
1221 *
1222 * Reads hdr_field to determine which headers are needed by firmware.
1223 * Builds a buffer containing these headers. Saves individual header
1224 * lengths and total buffer length to be used to build descriptors.
1225 */
1226static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1227 int *hdr_len, u8 *hdr_data)
1228{
1229 int len = 0;
1230 u8 *hdr;
1231
1232 hdr_len[0] = sizeof(struct ethhdr);
1233
1234 if (skb->protocol == htons(ETH_P_IP)) {
1235 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1236 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1237 hdr_len[2] = tcp_hdrlen(skb);
1238 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1239 hdr_len[2] = sizeof(struct udphdr);
1240 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1241 hdr_len[1] = sizeof(struct ipv6hdr);
1242 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1243 hdr_len[2] = tcp_hdrlen(skb);
1244 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1245 hdr_len[2] = sizeof(struct udphdr);
4eb50ceb
TF		 1246 } else if (skb->protocol == htons(ETH_P_ARP)) {
1247 hdr_len[1] = arp_hdr_len(skb->dev);
1248 hdr_len[2] = 0;
ad7775dc
TF		 1249 }
1250
1251 memset(hdr_data, 0, 120);
1252 if ((hdr_field >> 6) & 1) {
1253 hdr = skb_mac_header(skb);
1254 memcpy(hdr_data, hdr, hdr_len[0]);
1255 len += hdr_len[0];
1256 }
1257
1258 if ((hdr_field >> 5) & 1) {
1259 hdr = skb_network_header(skb);
1260 memcpy(hdr_data + len, hdr, hdr_len[1]);
1261 len += hdr_len[1];
1262 }
1263
1264 if ((hdr_field >> 4) & 1) {
1265 hdr = skb_transport_header(skb);
1266 memcpy(hdr_data + len, hdr, hdr_len[2]);
1267 len += hdr_len[2];
1268 }
1269 return len;
1270}
1271
1272/**
1273 * create_hdr_descs - create header and header extension descriptors
1274 * @hdr_field - bitfield determining needed headers
1275 * @data - buffer containing header data
1276 * @len - length of data buffer
1277 * @hdr_len - array of individual header lengths
1278 * @scrq_arr - descriptor array
1279 *
1280 * Creates header and, if needed, header extension descriptors and
1281 * places them in a descriptor array, scrq_arr
1282 */
1283
2de09681
TF		 1284static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1285 union sub_crq *scrq_arr)
ad7775dc
TF		 1286{
1287 union sub_crq hdr_desc;
1288 int tmp_len = len;
2de09681 1289 int num_descs = 0;
ad7775dc
TF		 1290 u8 *data, *cur;
1291 int tmp;
1292
1293 while (tmp_len > 0) {
1294 cur = hdr_data + len - tmp_len;
1295
1296 memset(&hdr_desc, 0, sizeof(hdr_desc));
1297 if (cur != hdr_data) {
1298 data = hdr_desc.hdr_ext.data;
1299 tmp = tmp_len > 29 ? 29 : tmp_len;
1300 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1301 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1302 hdr_desc.hdr_ext.len = tmp;
1303 } else {
1304 data = hdr_desc.hdr.data;
1305 tmp = tmp_len > 24 ? 24 : tmp_len;
1306 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1307 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1308 hdr_desc.hdr.len = tmp;
1309 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1310 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1311 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1312 hdr_desc.hdr.flag = hdr_field << 1;
1313 }
1314 memcpy(data, cur, tmp);
1315 tmp_len -= tmp;
1316 *scrq_arr = hdr_desc;
1317 scrq_arr++;
2de09681 1318 num_descs++;
ad7775dc 1319 }
2de09681
TF		 1320
1321 return num_descs;
ad7775dc
TF		 1322}
1323
1324/**
1325 * build_hdr_descs_arr - build a header descriptor array
1326 * @skb - socket buffer
1327 * @num_entries - number of descriptors to be sent
1328 * @subcrq - first TX descriptor
1329 * @hdr_field - bit field determining which headers will be sent
1330 *
1331 * This function will build a TX descriptor array with applicable
1332 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1333 */
1334
1335static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1336 int *num_entries, u8 hdr_field)
1337{
1338 int hdr_len[3] = {0, 0, 0};
2de09681 1339 int tot_len;
ad7775dc
TF		 1340 u8 *hdr_data = txbuff->hdr_data;
1341
1342 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1343 txbuff->hdr_data);
2de09681 1344 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
ad7775dc
TF		 1345 txbuff->indir_arr + 1);
1346}
1347
032c5e82
TF		 1348static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1349{
1350 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1351 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1352 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1353 struct device *dev = &adapter->vdev->dev;
1354 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1355 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1356 struct ibmvnic_tx_pool *tx_pool;
1357 unsigned int tx_send_failed = 0;
1358 unsigned int tx_map_failed = 0;
1359 unsigned int tx_dropped = 0;
1360 unsigned int tx_packets = 0;
1361 unsigned int tx_bytes = 0;
1362 dma_addr_t data_dma_addr;
1363 struct netdev_queue *txq;
032c5e82
TF		 1364 unsigned long lpar_rc;
1365 union sub_crq tx_crq;
1366 unsigned int offset;
ad7775dc 1367 int num_entries = 1;
032c5e82
TF		 1368 unsigned char *dst;
1369 u64 *handle_array;
1370 int index = 0;
a0dca10f 1371 u8 proto = 0;
032c5e82
TF		 1372 int ret = 0;
1373
ed651a10 1374 if (adapter->resetting) {
7f5b0308
TF		 1375 if (!netif_subqueue_stopped(netdev, skb))
1376 netif_stop_subqueue(netdev, queue_num);
1377 dev_kfree_skb_any(skb);
1378
032c5e82
TF		 1379 tx_send_failed++;
1380 tx_dropped++;
7f5b0308 1381 ret = NETDEV_TX_OK;
032c5e82
TF		 1382 goto out;
1383 }
1384
161b8a81
NF		 1385 tx_pool = &adapter->tx_pool[queue_num];
1386 tx_scrq = adapter->tx_scrq[queue_num];
1387 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1388 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1389 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1390
032c5e82 1391 index = tx_pool->free_map[tx_pool->consumer_index];
fdb06105
TF		 1392
1393 if (skb_is_gso(skb)) {
1394 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1395 dst = tx_pool->tso_ltb.buff + offset;
1396 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1397 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1398 tx_pool->tso_index++;
1399 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1400 tx_pool->tso_index = 0;
1401 } else {
1402 offset = index * adapter->req_mtu;
1403 dst = tx_pool->long_term_buff.buff + offset;
1404 memset(dst, 0, adapter->req_mtu);
1405 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1406 }
032c5e82 1407
15482056
TF		 1408 if (skb_shinfo(skb)->nr_frags) {
1409 int cur, i;
1410
1411 /* Copy the head */
1412 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1413 cur = skb_headlen(skb);
1414
1415 /* Copy the frags */
1416 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1417 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1418
1419 memcpy(dst + cur,
1420 page_address(skb_frag_page(frag)) +
1421 frag->page_offset, skb_frag_size(frag));
1422 cur += skb_frag_size(frag);
1423 }
1424 } else {
1425 skb_copy_from_linear_data(skb, dst, skb->len);
1426 }
1427
032c5e82
TF		 1428 tx_pool->consumer_index =
1429 (tx_pool->consumer_index + 1) %
068d9f90 1430 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1431
1432 tx_buff = &tx_pool->tx_buff[index];
1433 tx_buff->skb = skb;
1434 tx_buff->data_dma[0] = data_dma_addr;
1435 tx_buff->data_len[0] = skb->len;
1436 tx_buff->index = index;
1437 tx_buff->pool_index = queue_num;
1438 tx_buff->last_frag = true;
032c5e82
TF		 1439
1440 memset(&tx_crq, 0, sizeof(tx_crq));
1441 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1442 tx_crq.v1.type = IBMVNIC_TX_DESC;
1443 tx_crq.v1.n_crq_elem = 1;
1444 tx_crq.v1.n_sge = 1;
1445 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1446 tx_crq.v1.correlator = cpu_to_be32(index);
fdb06105
TF		 1447 if (skb_is_gso(skb))
1448 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1449 else
1450 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
032c5e82
TF		 1451 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1452 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1453
1454 if (adapter->vlan_header_insertion) {
1455 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1456 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1457 }
1458
1459 if (skb->protocol == htons(ETH_P_IP)) {
a0dca10f
TF		 1460 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1461 proto = ip_hdr(skb)->protocol;
1462 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1463 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1464 proto = ipv6_hdr(skb)->nexthdr;
032c5e82
TF		 1465 }
1466
a0dca10f
TF		 1467 if (proto == IPPROTO_TCP)
1468 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1469 else if (proto == IPPROTO_UDP)
1470 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1471
ad7775dc 1472 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1473 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1474 hdrs += 2;
1475 }
fdb06105
TF		 1476 if (skb_is_gso(skb)) {
1477 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1478 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1479 hdrs += 2;
1480 }
ad7775dc 1481 /* determine if l2/3/4 headers are sent to firmware */
2fa56a49 1482 if ((*hdrs >> 7) & 1) {
ad7775dc
TF		 1483 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1484 tx_crq.v1.n_crq_elem = num_entries;
1485 tx_buff->indir_arr[0] = tx_crq;
1486 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1487 sizeof(tx_buff->indir_arr),
1488 DMA_TO_DEVICE);
1489 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1490 dev_kfree_skb_any(skb);
1491 tx_buff->skb = NULL;
ad7775dc
TF		 1492 if (!firmware_has_feature(FW_FEATURE_CMO))
1493 dev_err(dev, "tx: unable to map descriptor array\n");
1494 tx_map_failed++;
1495 tx_dropped++;
7f5b0308 1496 ret = NETDEV_TX_OK;
ad7775dc
TF		 1497 goto out;
1498 }
498cd8e4 1499 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1500 (u64)tx_buff->indir_dma,
1501 (u64)num_entries);
1502 } else {
498cd8e4
JA		 1503 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1504 &tx_crq);
ad7775dc 1505 }
032c5e82
TF		 1506 if (lpar_rc != H_SUCCESS) {
1507 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1508
1509 if (tx_pool->consumer_index == 0)
1510 tx_pool->consumer_index =
068d9f90 1511 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1512 else
1513 tx_pool->consumer_index--;
1514
7f5b0308
TF		 1515 dev_kfree_skb_any(skb);
1516 tx_buff->skb = NULL;
1517
b8c80b84
TF		 1518 if (lpar_rc == H_CLOSED) {
1519 /* Disable TX and report carrier off if queue is closed.
1520 * Firmware guarantees that a signal will be sent to the
1521 * driver, triggering a reset or some other action.
1522 */
1523 netif_tx_stop_all_queues(netdev);
1524 netif_carrier_off(netdev);
1525 }
7f5b0308 1526
032c5e82
TF		 1527 tx_send_failed++;
1528 tx_dropped++;
7f5b0308 1529 ret = NETDEV_TX_OK;
032c5e82
TF		 1530 goto out;
1531 }
142c0ac4 1532
ffc385b9 1533 if (atomic_add_return(num_entries, &tx_scrq->used)
58c8c0c0 1534 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1535 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1536 netif_stop_subqueue(netdev, queue_num);
1537 }
1538
aa902947 1539 tx_buff->num_entries = num_entries;
032c5e82
TF		 1540 tx_packets++;
1541 tx_bytes += skb->len;
1542 txq->trans_start = jiffies;
1543 ret = NETDEV_TX_OK;
1544
1545out:
1546 netdev->stats.tx_dropped += tx_dropped;
1547 netdev->stats.tx_bytes += tx_bytes;
1548 netdev->stats.tx_packets += tx_packets;
1549 adapter->tx_send_failed += tx_send_failed;
1550 adapter->tx_map_failed += tx_map_failed;
3d52b594
JA		 1551 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1552 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1553 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
032c5e82
TF		 1554
1555 return ret;
1556}
1557
1558static void ibmvnic_set_multi(struct net_device *netdev)
1559{
1560 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1561 struct netdev_hw_addr *ha;
1562 union ibmvnic_crq crq;
1563
1564 memset(&crq, 0, sizeof(crq));
1565 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1566 crq.request_capability.cmd = REQUEST_CAPABILITY;
1567
1568 if (netdev->flags & IFF_PROMISC) {
1569 if (!adapter->promisc_supported)
1570 return;
1571 } else {
1572 if (netdev->flags & IFF_ALLMULTI) {
1573 /* Accept all multicast */
1574 memset(&crq, 0, sizeof(crq));
1575 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1576 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1577 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1578 ibmvnic_send_crq(adapter, &crq);
1579 } else if (netdev_mc_empty(netdev)) {
1580 /* Reject all multicast */
1581 memset(&crq, 0, sizeof(crq));
1582 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1583 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1584 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1585 ibmvnic_send_crq(adapter, &crq);
1586 } else {
1587 /* Accept one or more multicast(s) */
1588 netdev_for_each_mc_addr(ha, netdev) {
1589 memset(&crq, 0, sizeof(crq));
1590 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1591 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1592 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1593 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1594 ha->addr);
1595 ibmvnic_send_crq(adapter, &crq);
1596 }
1597 }
1598 }
1599}
1600
c26eba03 1601static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
032c5e82
TF		 1602{
1603 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1604 struct sockaddr *addr = p;
1605 union ibmvnic_crq crq;
1606
1607 if (!is_valid_ether_addr(addr->sa_data))
1608 return -EADDRNOTAVAIL;
1609
1610 memset(&crq, 0, sizeof(crq));
1611 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1612 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1613 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
f813614f
TF		 1614
1615 init_completion(&adapter->fw_done);
032c5e82 1616 ibmvnic_send_crq(adapter, &crq);
f813614f 1617 wait_for_completion(&adapter->fw_done);
032c5e82 1618 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
f813614f 1619 return adapter->fw_done_rc ? -EIO : 0;
032c5e82
TF		 1620}
1621
c26eba03
JA		 1622static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1623{
1624 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1625 struct sockaddr *addr = p;
f813614f 1626 int rc;
c26eba03 1627
3d166130 1628 if (adapter->state == VNIC_PROBED) {
c26eba03
JA		 1629 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1630 adapter->mac_change_pending = true;
1631 return 0;
1632 }
1633
f813614f 1634 rc = __ibmvnic_set_mac(netdev, addr);
c26eba03 1635
f813614f 1636 return rc;
c26eba03
JA		 1637}
1638
ed651a10
NF		 1639/**
1640 * do_reset returns zero if we are able to keep processing reset events, or
1641 * non-zero if we hit a fatal error and must halt.
1642 */
1643static int do_reset(struct ibmvnic_adapter *adapter,
1644 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1645{
896d8695 1646 u64 old_num_rx_queues, old_num_tx_queues;
ed651a10
NF		 1647 struct net_device *netdev = adapter->netdev;
1648 int i, rc;
1649
d1cf33d9
NF		 1650 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1651 rwi->reset_reason);
1652
ed651a10
NF		 1653 netif_carrier_off(netdev);
1654 adapter->reset_reason = rwi->reset_reason;
1655
896d8695
JA		 1656 old_num_rx_queues = adapter->req_rx_queues;
1657 old_num_tx_queues = adapter->req_tx_queues;
1658
ed651a10
NF		 1659 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1660 rc = ibmvnic_reenable_crq_queue(adapter);
1661 if (rc)
1662 return 0;
1663 }
1664
1665 rc = __ibmvnic_close(netdev);
1666 if (rc)
1667 return rc;
1668
c26eba03
JA		 1669 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1670 adapter->wait_for_reset) {
1671 release_resources(adapter);
d7c0ef36 1672 release_sub_crqs(adapter, 1);
c26eba03
JA		 1673 release_crq_queue(adapter);
1674 }
1675
8cb31cfc
JA		 1676 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1677 /* remove the closed state so when we call open it appears
1678 * we are coming from the probed state.
1679 */
1680 adapter->state = VNIC_PROBED;
032c5e82 1681
8cb31cfc
JA		 1682 rc = ibmvnic_init(adapter);
1683 if (rc)
2a1bf511 1684 return IBMVNIC_INIT_FAILED;
ed651a10 1685
8cb31cfc
JA		 1686 /* If the adapter was in PROBE state prior to the reset,
1687 * exit here.
1688 */
1689 if (reset_state == VNIC_PROBED)
1690 return 0;
ed651a10 1691
8cb31cfc
JA		 1692 rc = ibmvnic_login(netdev);
1693 if (rc) {
1694 adapter->state = VNIC_PROBED;
1695 return 0;
1696 }
ed651a10 1697
c26eba03
JA		 1698 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1699 adapter->wait_for_reset) {
1700 rc = init_resources(adapter);
1701 if (rc)
1702 return rc;
896d8695
JA		 1703 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1704 adapter->req_tx_queues != old_num_tx_queues) {
faefaa97 1705 adapter->map_id = 1;
896d8695
JA		 1706 release_rx_pools(adapter);
1707 release_tx_pools(adapter);
1708 init_rx_pools(netdev);
1709 init_tx_pools(netdev);
d9043c10 1710
86f669b2
NF		 1711 release_napi(adapter);
1712 init_napi(adapter);
c26eba03
JA		 1713 } else {
1714 rc = reset_tx_pools(adapter);
1715 if (rc)
1716 return rc;
8c0543ad 1717
c26eba03
JA		 1718 rc = reset_rx_pools(adapter);
1719 if (rc)
1720 return rc;
ed651a10 1721
c26eba03
JA		 1722 if (reset_state == VNIC_CLOSED)
1723 return 0;
1724 }
8cb31cfc 1725 }
ed651a10
NF		 1726
1727 rc = __ibmvnic_open(netdev);
1728 if (rc) {
1729 if (list_empty(&adapter->rwi_list))
1730 adapter->state = VNIC_CLOSED;
1731 else
1732 adapter->state = reset_state;
1733
1734 return 0;
1735 }
1736
ed651a10
NF		 1737 /* kick napi */
1738 for (i = 0; i < adapter->req_rx_queues; i++)
1739 napi_schedule(&adapter->napi[i]);
1740
61d3e1d9
NF		 1741 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1742 netdev_notify_peers(netdev);
1743
cc85c02e
TF		 1744 netif_carrier_on(netdev);
1745
ed651a10
NF		 1746 return 0;
1747}
1748
1749static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1750{
1751 struct ibmvnic_rwi *rwi;
1752
1753 mutex_lock(&adapter->rwi_lock);
1754
1755 if (!list_empty(&adapter->rwi_list)) {
1756 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1757 list);
1758 list_del(&rwi->list);
1759 } else {
1760 rwi = NULL;
1761 }
1762
1763 mutex_unlock(&adapter->rwi_lock);
1764 return rwi;
1765}
1766
1767static void free_all_rwi(struct ibmvnic_adapter *adapter)
1768{
1769 struct ibmvnic_rwi *rwi;
1770
1771 rwi = get_next_rwi(adapter);
1772 while (rwi) {
1773 kfree(rwi);
1774 rwi = get_next_rwi(adapter);
1775 }
1776}
1777
1778static void __ibmvnic_reset(struct work_struct *work)
1779{
1780 struct ibmvnic_rwi *rwi;
1781 struct ibmvnic_adapter *adapter;
1782 struct net_device *netdev;
1783 u32 reset_state;
c26eba03 1784 int rc = 0;
ed651a10
NF		 1785
1786 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1787 netdev = adapter->netdev;
1788
1789 mutex_lock(&adapter->reset_lock);
1790 adapter->resetting = true;
1791 reset_state = adapter->state;
1792
1793 rwi = get_next_rwi(adapter);
1794 while (rwi) {
1795 rc = do_reset(adapter, rwi, reset_state);
1796 kfree(rwi);
2a1bf511 1797 if (rc && rc != IBMVNIC_INIT_FAILED)
ed651a10
NF		 1798 break;
1799
1800 rwi = get_next_rwi(adapter);
1801 }
1802
c26eba03
JA		 1803 if (adapter->wait_for_reset) {
1804 adapter->wait_for_reset = false;
1805 adapter->reset_done_rc = rc;
1806 complete(&adapter->reset_done);
1807 }
1808
ed651a10 1809 if (rc) {
d1cf33d9 1810 netdev_dbg(adapter->netdev, "Reset failed\n");
ed651a10 1811 free_all_rwi(adapter);
6d0af07d 1812 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1813 return;
1814 }
1815
1816 adapter->resetting = false;
1817 mutex_unlock(&adapter->reset_lock);
1818}
1819
1820static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1821 enum ibmvnic_reset_reason reason)
1822{
1823 struct ibmvnic_rwi *rwi, *tmp;
1824 struct net_device *netdev = adapter->netdev;
1825 struct list_head *entry;
1826
1827 if (adapter->state == VNIC_REMOVING ||
1828 adapter->state == VNIC_REMOVED) {
1829 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1830 return;
1831 }
1832
6a2fb0e9
NF		 1833 if (adapter->state == VNIC_PROBING) {
1834 netdev_warn(netdev, "Adapter reset during probe\n");
1835 adapter->init_done_rc = EAGAIN;
1836 return;
1837 }
1838
ed651a10
NF		 1839 mutex_lock(&adapter->rwi_lock);
1840
1841 list_for_each(entry, &adapter->rwi_list) {
1842 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1843 if (tmp->reset_reason == reason) {
d1cf33d9 1844 netdev_dbg(netdev, "Skipping matching reset\n");
ed651a10
NF		 1845 mutex_unlock(&adapter->rwi_lock);
1846 return;
1847 }
1848 }
1849
1850 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1851 if (!rwi) {
1852 mutex_unlock(&adapter->rwi_lock);
1853 ibmvnic_close(netdev);
1854 return;
1855 }
1856
1857 rwi->reset_reason = reason;
1858 list_add_tail(&rwi->list, &adapter->rwi_list);
1859 mutex_unlock(&adapter->rwi_lock);
d1cf33d9
NF		 1860
1861 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
ed651a10
NF		 1862 schedule_work(&adapter->ibmvnic_reset);
1863}
1864
1865static void ibmvnic_tx_timeout(struct net_device *dev)
1866{
1867 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1868
1869 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1870}
1871
1872static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1873 struct ibmvnic_rx_buff *rx_buff)
1874{
1875 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1876
1877 rx_buff->skb = NULL;
1878
1879 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1880 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1881
1882 atomic_dec(&pool->available);
1883}
1884
1885static int ibmvnic_poll(struct napi_struct *napi, int budget)
1886{
1887 struct net_device *netdev = napi->dev;
1888 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1889 int scrq_num = (int)(napi - adapter->napi);
1890 int frames_processed = 0;
152ce47d 1891
032c5e82
TF		 1892restart_poll:
1893 while (frames_processed < budget) {
1894 struct sk_buff *skb;
1895 struct ibmvnic_rx_buff *rx_buff;
1896 union sub_crq *next;
1897 u32 length;
1898 u16 offset;
1899 u8 flags = 0;
1900
3468656f
JA		 1901 if (unlikely(adapter->resetting &&
1902 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
21ecba6c
TF		 1903 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1904 napi_complete_done(napi, frames_processed);
1905 return frames_processed;
1906 }
1907
032c5e82
TF		 1908 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1909 break;
1910 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1911 rx_buff =
1912 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1913 rx_comp.correlator);
1914 /* do error checking */
1915 if (next->rx_comp.rc) {
e1cea2e7
JA		 1916 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1917 be16_to_cpu(next->rx_comp.rc));
032c5e82
TF		 1918 /* free the entry */
1919 next->rx_comp.first = 0;
4b9b0f01 1920 dev_kfree_skb_any(rx_buff->skb);
032c5e82 1921 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1922 continue;
abe27a88
TF		 1923 } else if (!rx_buff->skb) {
1924 /* free the entry */
1925 next->rx_comp.first = 0;
1926 remove_buff_from_pool(adapter, rx_buff);
1927 continue;
032c5e82
TF		 1928 }
1929
1930 length = be32_to_cpu(next->rx_comp.len);
1931 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1932 flags = next->rx_comp.flags;
1933 skb = rx_buff->skb;
1934 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1935 length);
6052d5e2
MFV		 1936
1937 /* VLAN Header has been stripped by the system firmware and
1938 * needs to be inserted by the driver
1939 */
1940 if (adapter->rx_vlan_header_insertion &&
1941 (flags & IBMVNIC_VLAN_STRIPPED))
1942 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1943 ntohs(next->rx_comp.vlan_tci));
1944
032c5e82
TF		 1945 /* free the entry */
1946 next->rx_comp.first = 0;
1947 remove_buff_from_pool(adapter, rx_buff);
1948
1949 skb_put(skb, length);
1950 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1951 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1952
1953 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1954 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1955 skb->ip_summed = CHECKSUM_UNNECESSARY;
1956 }
1957
1958 length = skb->len;
1959 napi_gro_receive(napi, skb); /* send it up */
1960 netdev->stats.rx_packets++;
1961 netdev->stats.rx_bytes += length;
3d52b594
JA		 1962 adapter->rx_stats_buffers[scrq_num].packets++;
1963 adapter->rx_stats_buffers[scrq_num].bytes += length;
032c5e82
TF		 1964 frames_processed++;
1965 }
152ce47d
NF		 1966
1967 if (adapter->state != VNIC_CLOSING)
1968 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1969
1970 if (frames_processed < budget) {
1971 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1972 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1973 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1974 napi_reschedule(napi)) {
1975 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1976 goto restart_poll;
1977 }
1978 }
1979 return frames_processed;
1980}
1981
1982#ifdef CONFIG_NET_POLL_CONTROLLER
1983static void ibmvnic_netpoll_controller(struct net_device *dev)
1984{
1985 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1986 int i;
1987
1988 replenish_pools(netdev_priv(dev));
1989 for (i = 0; i < adapter->req_rx_queues; i++)
1990 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1991 adapter->rx_scrq[i]);
1992}
1993#endif
1994
c26eba03
JA		 1995static int wait_for_reset(struct ibmvnic_adapter *adapter)
1996{
1997 adapter->fallback.mtu = adapter->req_mtu;
1998 adapter->fallback.rx_queues = adapter->req_rx_queues;
1999 adapter->fallback.tx_queues = adapter->req_tx_queues;
2000 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2001 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2002
2003 init_completion(&adapter->reset_done);
2004 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2005 adapter->wait_for_reset = true;
2006 wait_for_completion(&adapter->reset_done);
2007
2008 if (adapter->reset_done_rc) {
2009 adapter->desired.mtu = adapter->fallback.mtu;
2010 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2011 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2012 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2013 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2014
2015 init_completion(&adapter->reset_done);
2016 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2017 wait_for_completion(&adapter->reset_done);
2018 }
2019 adapter->wait_for_reset = false;
2020
2021 return adapter->reset_done_rc;
2022}
2023
3a807b75
JA		 2024static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2025{
c26eba03
JA		 2026 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2027
2028 adapter->desired.mtu = new_mtu + ETH_HLEN;
2029
2030 return wait_for_reset(adapter);
3a807b75
JA		 2031}
2032
032c5e82
TF		 2033static const struct net_device_ops ibmvnic_netdev_ops = {
2034 .ndo_open = ibmvnic_open,
2035 .ndo_stop = ibmvnic_close,
2036 .ndo_start_xmit = ibmvnic_xmit,
2037 .ndo_set_rx_mode = ibmvnic_set_multi,
2038 .ndo_set_mac_address = ibmvnic_set_mac,
2039 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 2040 .ndo_tx_timeout = ibmvnic_tx_timeout,
2041#ifdef CONFIG_NET_POLL_CONTROLLER
2042 .ndo_poll_controller = ibmvnic_netpoll_controller,
2043#endif
3a807b75 2044 .ndo_change_mtu = ibmvnic_change_mtu,
032c5e82
TF		 2045};
2046
2047/* ethtool functions */
2048
8a43379f
PR		 2049static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2050 struct ethtool_link_ksettings *cmd)
032c5e82 2051{
8a43379f
PR		 2052 u32 supported, advertising;
2053
2054 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 2055 SUPPORTED_FIBRE);
8a43379f 2056 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 2057 ADVERTISED_FIBRE);
8a43379f
PR		 2058 cmd->base.speed = SPEED_1000;
2059 cmd->base.duplex = DUPLEX_FULL;
2060 cmd->base.port = PORT_FIBRE;
2061 cmd->base.phy_address = 0;
2062 cmd->base.autoneg = AUTONEG_ENABLE;
2063
2064 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2065 supported);
2066 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2067 advertising);
2068
032c5e82
TF		 2069 return 0;
2070}
2071
4e6759be 2072static void ibmvnic_get_drvinfo(struct net_device *netdev,
032c5e82
TF		 2073 struct ethtool_drvinfo *info)
2074{
4e6759be
DANR		 2075 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2076
032c5e82
TF		 2077 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2078 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
4e6759be
DANR		 2079 strlcpy(info->fw_version, adapter->fw_version,
2080 sizeof(info->fw_version));
032c5e82
TF		 2081}
2082
2083static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2084{
2085 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2086
2087 return adapter->msg_enable;
2088}
2089
2090static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2091{
2092 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2093
2094 adapter->msg_enable = data;
2095}
2096
2097static u32 ibmvnic_get_link(struct net_device *netdev)
2098{
2099 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2100
2101 /* Don't need to send a query because we request a logical link up at
2102 * init and then we wait for link state indications
2103 */
2104 return adapter->logical_link_state;
2105}
2106
2107static void ibmvnic_get_ringparam(struct net_device *netdev,
2108 struct ethtool_ringparam *ring)
2109{
bc131b3a
JA		 2110 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2111
2112 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2113 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
032c5e82
TF		 2114 ring->rx_mini_max_pending = 0;
2115 ring->rx_jumbo_max_pending = 0;
bc131b3a
JA		 2116 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2117 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2118 ring->rx_mini_pending = 0;
2119 ring->rx_jumbo_pending = 0;
2120}
2121
c26eba03
JA		 2122static int ibmvnic_set_ringparam(struct net_device *netdev,
2123 struct ethtool_ringparam *ring)
2124{
2125 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2126
2127 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2128 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2129 netdev_err(netdev, "Invalid request.\n");
2130 netdev_err(netdev, "Max tx buffers = %llu\n",
2131 adapter->max_rx_add_entries_per_subcrq);
2132 netdev_err(netdev, "Max rx buffers = %llu\n",
2133 adapter->max_tx_entries_per_subcrq);
2134 return -EINVAL;
2135 }
2136
2137 adapter->desired.rx_entries = ring->rx_pending;
2138 adapter->desired.tx_entries = ring->tx_pending;
2139
2140 return wait_for_reset(adapter);
2141}
2142
c2dbeb67
JA		 2143static void ibmvnic_get_channels(struct net_device *netdev,
2144 struct ethtool_channels *channels)
2145{
2146 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2147
2148 channels->max_rx = adapter->max_rx_queues;
2149 channels->max_tx = adapter->max_tx_queues;
2150 channels->max_other = 0;
2151 channels->max_combined = 0;
2152 channels->rx_count = adapter->req_rx_queues;
2153 channels->tx_count = adapter->req_tx_queues;
2154 channels->other_count = 0;
2155 channels->combined_count = 0;
2156}
2157
c26eba03
JA		 2158static int ibmvnic_set_channels(struct net_device *netdev,
2159 struct ethtool_channels *channels)
2160{
2161 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2162
2163 adapter->desired.rx_queues = channels->rx_count;
2164 adapter->desired.tx_queues = channels->tx_count;
2165
2166 return wait_for_reset(adapter);
2167}
2168
032c5e82
TF		 2169static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2170{
3d52b594 2171 struct ibmvnic_adapter *adapter = netdev_priv(dev);
032c5e82
TF		 2172 int i;
2173
2174 if (stringset != ETH_SS_STATS)
2175 return;
2176
2177 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2178 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
3d52b594
JA		 2179
2180 for (i = 0; i < adapter->req_tx_queues; i++) {
2181 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2182 data += ETH_GSTRING_LEN;
2183
2184 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2185 data += ETH_GSTRING_LEN;
2186
2187 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2188 data += ETH_GSTRING_LEN;
2189 }
2190
2191 for (i = 0; i < adapter->req_rx_queues; i++) {
2192 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2193 data += ETH_GSTRING_LEN;
2194
2195 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2196 data += ETH_GSTRING_LEN;
2197
2198 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2199 data += ETH_GSTRING_LEN;
2200 }
032c5e82
TF		 2201}
2202
2203static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2204{
3d52b594
JA		 2205 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2206
032c5e82
TF		 2207 switch (sset) {
2208 case ETH_SS_STATS:
3d52b594
JA		 2209 return ARRAY_SIZE(ibmvnic_stats) +
2210 adapter->req_tx_queues * NUM_TX_STATS +
2211 adapter->req_rx_queues * NUM_RX_STATS;
032c5e82
TF		 2212 default:
2213 return -EOPNOTSUPP;
2214 }
2215}
2216
2217static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2218 struct ethtool_stats *stats, u64 *data)
2219{
2220 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2221 union ibmvnic_crq crq;
3d52b594 2222 int i, j;
032c5e82
TF		 2223
2224 memset(&crq, 0, sizeof(crq));
2225 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2226 crq.request_statistics.cmd = REQUEST_STATISTICS;
2227 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2228 crq.request_statistics.len =
2229 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 2230
2231 /* Wait for data to be written */
2232 init_completion(&adapter->stats_done);
db5d0b59 2233 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 2234 wait_for_completion(&adapter->stats_done);
2235
2236 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
52da5c11
JA		 2237 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2238 ibmvnic_stats[i].offset));
3d52b594
JA		 2239
2240 for (j = 0; j < adapter->req_tx_queues; j++) {
2241 data[i] = adapter->tx_stats_buffers[j].packets;
2242 i++;
2243 data[i] = adapter->tx_stats_buffers[j].bytes;
2244 i++;
2245 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2246 i++;
2247 }
2248
2249 for (j = 0; j < adapter->req_rx_queues; j++) {
2250 data[i] = adapter->rx_stats_buffers[j].packets;
2251 i++;
2252 data[i] = adapter->rx_stats_buffers[j].bytes;
2253 i++;
2254 data[i] = adapter->rx_stats_buffers[j].interrupts;
2255 i++;
2256 }
032c5e82
TF		 2257}
2258
2259static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 2260 .get_drvinfo = ibmvnic_get_drvinfo,
2261 .get_msglevel = ibmvnic_get_msglevel,
2262 .set_msglevel = ibmvnic_set_msglevel,
2263 .get_link = ibmvnic_get_link,
2264 .get_ringparam = ibmvnic_get_ringparam,
c26eba03 2265 .set_ringparam = ibmvnic_set_ringparam,
c2dbeb67 2266 .get_channels = ibmvnic_get_channels,
c26eba03 2267 .set_channels = ibmvnic_set_channels,
032c5e82
TF		 2268 .get_strings = ibmvnic_get_strings,
2269 .get_sset_count = ibmvnic_get_sset_count,
2270 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 2271 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 2272};
2273
2274/* Routines for managing CRQs/sCRQs */
2275
57a49436
NF		 2276static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2277 struct ibmvnic_sub_crq_queue *scrq)
2278{
2279 int rc;
2280
2281 if (scrq->irq) {
2282 free_irq(scrq->irq, scrq);
2283 irq_dispose_mapping(scrq->irq);
2284 scrq->irq = 0;
2285 }
2286
c8b2ad0a 2287 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
57a49436
NF		 2288 scrq->cur = 0;
2289
2290 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2291 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2292 return rc;
2293}
2294
2295static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2296{
2297 int i, rc;
2298
2299 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 2300 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
57a49436
NF		 2301 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2302 if (rc)
2303 return rc;
2304 }
2305
2306 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 2307 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
57a49436
NF		 2308 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2309 if (rc)
2310 return rc;
2311 }
2312
57a49436
NF		 2313 return rc;
2314}
2315
032c5e82 2316static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
d7c0ef36
NF		 2317 struct ibmvnic_sub_crq_queue *scrq,
2318 bool do_h_free)
032c5e82
TF		 2319{
2320 struct device *dev = &adapter->vdev->dev;
2321 long rc;
2322
2323 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2324
d7c0ef36
NF		 2325 if (do_h_free) {
2326 /* Close the sub-crqs */
2327 do {
2328 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2329 adapter->vdev->unit_address,
2330 scrq->crq_num);
2331 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
032c5e82 2332
d7c0ef36
NF		 2333 if (rc) {
2334 netdev_err(adapter->netdev,
2335 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2336 scrq->crq_num, rc);
2337 }
ffa73855
TF		 2338 }
2339
032c5e82
TF		 2340 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2341 DMA_BIDIRECTIONAL);
2342 free_pages((unsigned long)scrq->msgs, 2);
2343 kfree(scrq);
2344}
2345
2346static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2347 *adapter)
2348{
2349 struct device *dev = &adapter->vdev->dev;
2350 struct ibmvnic_sub_crq_queue *scrq;
2351 int rc;
2352
1bb3c739 2353 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 2354 if (!scrq)
2355 return NULL;
2356
7f7adc50 2357 scrq->msgs =
1bb3c739 2358 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 2359 if (!scrq->msgs) {
2360 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2361 goto zero_page_failed;
2362 }
2363
2364 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2365 DMA_BIDIRECTIONAL);
2366 if (dma_mapping_error(dev, scrq->msg_token)) {
2367 dev_warn(dev, "Couldn't map crq queue messages page\n");
2368 goto map_failed;
2369 }
2370
2371 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2372 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2373
2374 if (rc == H_RESOURCE)
2375 rc = ibmvnic_reset_crq(adapter);
2376
2377 if (rc == H_CLOSED) {
2378 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2379 } else if (rc) {
2380 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2381 goto reg_failed;
2382 }
2383
032c5e82
TF		 2384 scrq->adapter = adapter;
2385 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 2386 spin_lock_init(&scrq->lock);
2387
2388 netdev_dbg(adapter->netdev,
2389 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2390 scrq->crq_num, scrq->hw_irq, scrq->irq);
2391
2392 return scrq;
2393
032c5e82
TF		 2394reg_failed:
2395 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2396 DMA_BIDIRECTIONAL);
2397map_failed:
2398 free_pages((unsigned long)scrq->msgs, 2);
2399zero_page_failed:
2400 kfree(scrq);
2401
2402 return NULL;
2403}
2404
d7c0ef36 2405static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
032c5e82
TF		 2406{
2407 int i;
2408
2409 if (adapter->tx_scrq) {
82e3be32 2410 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
b510888f
NF		 2411 if (!adapter->tx_scrq[i])
2412 continue;
2413
d1cf33d9
NF		 2414 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2415 i);
b510888f 2416 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 2417 free_irq(adapter->tx_scrq[i]->irq,
2418 adapter->tx_scrq[i]);
88eb98a0 2419 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 2420 adapter->tx_scrq[i]->irq = 0;
032c5e82 2421 }
b510888f 2422
d7c0ef36
NF		 2423 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2424 do_h_free);
b510888f
NF		 2425 }
2426
9501df3c 2427 kfree(adapter->tx_scrq);
032c5e82 2428 adapter->tx_scrq = NULL;
82e3be32 2429 adapter->num_active_tx_scrqs = 0;
032c5e82
TF		 2430 }
2431
2432 if (adapter->rx_scrq) {
82e3be32 2433 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
b510888f
NF		 2434 if (!adapter->rx_scrq[i])
2435 continue;
2436
d1cf33d9
NF		 2437 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2438 i);
b510888f 2439 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 2440 free_irq(adapter->rx_scrq[i]->irq,
2441 adapter->rx_scrq[i]);
88eb98a0 2442 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 2443 adapter->rx_scrq[i]->irq = 0;
032c5e82 2444 }
032c5e82 2445
d7c0ef36
NF		 2446 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2447 do_h_free);
b510888f 2448 }
ea22d51a 2449
b510888f 2450 kfree(adapter->rx_scrq);
ea22d51a 2451 adapter->rx_scrq = NULL;
82e3be32 2452 adapter->num_active_rx_scrqs = 0;
ea22d51a 2453 }
ea22d51a
TF		 2454}
2455
032c5e82
TF		 2456static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2457 struct ibmvnic_sub_crq_queue *scrq)
2458{
2459 struct device *dev = &adapter->vdev->dev;
2460 unsigned long rc;
2461
2462 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2463 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2464 if (rc)
2465 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2466 scrq->hw_irq, rc);
2467 return rc;
2468}
2469
2470static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2471 struct ibmvnic_sub_crq_queue *scrq)
2472{
2473 struct device *dev = &adapter->vdev->dev;
2474 unsigned long rc;
2475
2476 if (scrq->hw_irq > 0x100000000ULL) {
2477 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2478 return 1;
2479 }
2480
2481 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2482 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2483 if (rc)
2484 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2485 scrq->hw_irq, rc);
2486 return rc;
2487}
2488
2489static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2490 struct ibmvnic_sub_crq_queue *scrq)
2491{
2492 struct device *dev = &adapter->vdev->dev;
2493 struct ibmvnic_tx_buff *txbuff;
2494 union sub_crq *next;
2495 int index;
2496 int i, j;
ad7775dc 2497 u8 first;
032c5e82
TF		 2498
2499restart_loop:
2500 while (pending_scrq(adapter, scrq)) {
2501 unsigned int pool = scrq->pool_index;
ffc385b9 2502 int num_entries = 0;
032c5e82
TF		 2503
2504 next = ibmvnic_next_scrq(adapter, scrq);
2505 for (i = 0; i < next->tx_comp.num_comps; i++) {
2506 if (next->tx_comp.rcs[i]) {
2507 dev_err(dev, "tx error %x\n",
2508 next->tx_comp.rcs[i]);
2509 continue;
2510 }
2511 index = be32_to_cpu(next->tx_comp.correlators[i]);
2512 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2513
2514 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2515 if (!txbuff->data_dma[j])
2516 continue;
2517
2518 txbuff->data_dma[j] = 0;
032c5e82 2519 }
ad7775dc
TF		 2520 /* if sub_crq was sent indirectly */
2521 first = txbuff->indir_arr[0].generic.first;
2522 if (first == IBMVNIC_CRQ_CMD) {
2523 dma_unmap_single(dev, txbuff->indir_dma,
2524 sizeof(txbuff->indir_arr),
2525 DMA_TO_DEVICE);
2526 }
032c5e82 2527
142c0ac4 2528 if (txbuff->last_frag) {
032c5e82 2529 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 2530 txbuff->skb = NULL;
142c0ac4 2531 }
032c5e82 2532
ffc385b9
TF		 2533 num_entries += txbuff->num_entries;
2534
032c5e82
TF		 2535 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2536 producer_index] = index;
2537 adapter->tx_pool[pool].producer_index =
2538 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 2539 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2540 }
2541 /* remove tx_comp scrq*/
2542 next->tx_comp.first = 0;
7c3e7de3 2543
ffc385b9 2544 if (atomic_sub_return(num_entries, &scrq->used) <=
7c3e7de3
NF		 2545 (adapter->req_tx_entries_per_subcrq / 2) &&
2546 __netif_subqueue_stopped(adapter->netdev,
2547 scrq->pool_index)) {
2548 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2549 netdev_info(adapter->netdev, "Started queue %d\n",
2550 scrq->pool_index);
2551 }
032c5e82
TF		 2552 }
2553
2554 enable_scrq_irq(adapter, scrq);
2555
2556 if (pending_scrq(adapter, scrq)) {
2557 disable_scrq_irq(adapter, scrq);
2558 goto restart_loop;
2559 }
2560
2561 return 0;
2562}
2563
2564static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2565{
2566 struct ibmvnic_sub_crq_queue *scrq = instance;
2567 struct ibmvnic_adapter *adapter = scrq->adapter;
2568
2569 disable_scrq_irq(adapter, scrq);
2570 ibmvnic_complete_tx(adapter, scrq);
2571
2572 return IRQ_HANDLED;
2573}
2574
2575static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2576{
2577 struct ibmvnic_sub_crq_queue *scrq = instance;
2578 struct ibmvnic_adapter *adapter = scrq->adapter;
2579
09fb35ea
NF		 2580 /* When booting a kdump kernel we can hit pending interrupts
2581 * prior to completing driver initialization.
2582 */
2583 if (unlikely(adapter->state != VNIC_OPEN))
2584 return IRQ_NONE;
2585
3d52b594
JA		 2586 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2587
032c5e82
TF		 2588 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2589 disable_scrq_irq(adapter, scrq);
2590 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2591 }
2592
2593 return IRQ_HANDLED;
2594}
2595
ea22d51a
TF		 2596static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2597{
2598 struct device *dev = &adapter->vdev->dev;
2599 struct ibmvnic_sub_crq_queue *scrq;
2600 int i = 0, j = 0;
2601 int rc = 0;
2602
2603 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9
NF		 2604 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2605 i);
ea22d51a
TF		 2606 scrq = adapter->tx_scrq[i];
2607 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2608
99c1790e 2609 if (!scrq->irq) {
ea22d51a
TF		 2610 rc = -EINVAL;
2611 dev_err(dev, "Error mapping irq\n");
2612 goto req_tx_irq_failed;
2613 }
2614
2615 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2616 0, "ibmvnic_tx", scrq);
2617
2618 if (rc) {
2619 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2620 scrq->irq, rc);
2621 irq_dispose_mapping(scrq->irq);
af9090c2 2622 goto req_tx_irq_failed;
ea22d51a
TF		 2623 }
2624 }
2625
2626 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 2627 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2628 i);
ea22d51a
TF		 2629 scrq = adapter->rx_scrq[i];
2630 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2631 if (!scrq->irq) {
ea22d51a
TF		 2632 rc = -EINVAL;
2633 dev_err(dev, "Error mapping irq\n");
2634 goto req_rx_irq_failed;
2635 }
2636 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2637 0, "ibmvnic_rx", scrq);
2638 if (rc) {
2639 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2640 scrq->irq, rc);
2641 irq_dispose_mapping(scrq->irq);
2642 goto req_rx_irq_failed;
2643 }
2644 }
2645 return rc;
2646
2647req_rx_irq_failed:
8bf371e6 2648 for (j = 0; j < i; j++) {
ea22d51a
TF		 2649 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2650 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2651 }
ea22d51a
TF		 2652 i = adapter->req_tx_queues;
2653req_tx_irq_failed:
8bf371e6 2654 for (j = 0; j < i; j++) {
ea22d51a
TF		 2655 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2656 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2657 }
d7c0ef36 2658 release_sub_crqs(adapter, 1);
ea22d51a
TF		 2659 return rc;
2660}
2661
d346b9bc 2662static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2663{
2664 struct device *dev = &adapter->vdev->dev;
2665 struct ibmvnic_sub_crq_queue **allqueues;
2666 int registered_queues = 0;
032c5e82
TF		 2667 int total_queues;
2668 int more = 0;
ea22d51a 2669 int i;
032c5e82 2670
032c5e82
TF		 2671 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2672
1bb3c739 2673 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2674 if (!allqueues)
d346b9bc 2675 return -1;
032c5e82
TF		 2676
2677 for (i = 0; i < total_queues; i++) {
2678 allqueues[i] = init_sub_crq_queue(adapter);
2679 if (!allqueues[i]) {
2680 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2681 break;
2682 }
2683 registered_queues++;
2684 }
2685
2686 /* Make sure we were able to register the minimum number of queues */
2687 if (registered_queues <
2688 adapter->min_tx_queues + adapter->min_rx_queues) {
2689 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2690 goto tx_failed;
2691 }
2692
2693 /* Distribute the failed allocated queues*/
2694 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2695 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2696 switch (i % 3) {
2697 case 0:
2698 if (adapter->req_rx_queues > adapter->min_rx_queues)
2699 adapter->req_rx_queues--;
2700 else
2701 more++;
2702 break;
2703 case 1:
2704 if (adapter->req_tx_queues > adapter->min_tx_queues)
2705 adapter->req_tx_queues--;
2706 else
2707 more++;
2708 break;
2709 }
2710 }
2711
2712 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2713 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2714 if (!adapter->tx_scrq)
2715 goto tx_failed;
2716
2717 for (i = 0; i < adapter->req_tx_queues; i++) {
2718 adapter->tx_scrq[i] = allqueues[i];
2719 adapter->tx_scrq[i]->pool_index = i;
82e3be32 2720 adapter->num_active_tx_scrqs++;
032c5e82
TF		 2721 }
2722
2723 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2724 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2725 if (!adapter->rx_scrq)
2726 goto rx_failed;
2727
2728 for (i = 0; i < adapter->req_rx_queues; i++) {
2729 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2730 adapter->rx_scrq[i]->scrq_num = i;
82e3be32 2731 adapter->num_active_rx_scrqs++;
032c5e82
TF		 2732 }
2733
d346b9bc
NF		 2734 kfree(allqueues);
2735 return 0;
2736
2737rx_failed:
2738 kfree(adapter->tx_scrq);
2739 adapter->tx_scrq = NULL;
2740tx_failed:
2741 for (i = 0; i < registered_queues; i++)
d7c0ef36 2742 release_sub_crq_queue(adapter, allqueues[i], 1);
d346b9bc
NF		 2743 kfree(allqueues);
2744 return -1;
2745}
2746
2747static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2748{
2749 struct device *dev = &adapter->vdev->dev;
2750 union ibmvnic_crq crq;
c26eba03 2751 int max_entries;
d346b9bc
NF		 2752
2753 if (!retry) {
2754 /* Sub-CRQ entries are 32 byte long */
2755 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2756
2757 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2758 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2759 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2760 return;
2761 }
2762
c26eba03
JA		 2763 if (adapter->desired.mtu)
2764 adapter->req_mtu = adapter->desired.mtu;
2765 else
2766 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2767
2768 if (!adapter->desired.tx_entries)
2769 adapter->desired.tx_entries =
2770 adapter->max_tx_entries_per_subcrq;
2771 if (!adapter->desired.rx_entries)
2772 adapter->desired.rx_entries =
2773 adapter->max_rx_add_entries_per_subcrq;
2774
2775 max_entries = IBMVNIC_MAX_LTB_SIZE /
2776 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2777
2778 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2779 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2780 adapter->desired.tx_entries = max_entries;
2781 }
d346b9bc 2782
c26eba03
JA		 2783 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2784 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2785 adapter->desired.rx_entries = max_entries;
2786 }
2787
2788 if (adapter->desired.tx_entries)
2789 adapter->req_tx_entries_per_subcrq =
2790 adapter->desired.tx_entries;
2791 else
2792 adapter->req_tx_entries_per_subcrq =
2793 adapter->max_tx_entries_per_subcrq;
2794
2795 if (adapter->desired.rx_entries)
2796 adapter->req_rx_add_entries_per_subcrq =
2797 adapter->desired.rx_entries;
2798 else
2799 adapter->req_rx_add_entries_per_subcrq =
2800 adapter->max_rx_add_entries_per_subcrq;
2801
2802 if (adapter->desired.tx_queues)
2803 adapter->req_tx_queues =
2804 adapter->desired.tx_queues;
2805 else
2806 adapter->req_tx_queues =
2807 adapter->opt_tx_comp_sub_queues;
2808
2809 if (adapter->desired.rx_queues)
2810 adapter->req_rx_queues =
2811 adapter->desired.rx_queues;
2812 else
2813 adapter->req_rx_queues =
2814 adapter->opt_rx_comp_queues;
2815
2816 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
d346b9bc
NF		 2817 }
2818
032c5e82
TF		 2819 memset(&crq, 0, sizeof(crq));
2820 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2821 crq.request_capability.cmd = REQUEST_CAPABILITY;
2822
2823 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2824 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2825 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2826 ibmvnic_send_crq(adapter, &crq);
2827
2828 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2829 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2830 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2831 ibmvnic_send_crq(adapter, &crq);
2832
2833 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2834 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2835 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2836 ibmvnic_send_crq(adapter, &crq);
2837
2838 crq.request_capability.capability =
2839 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2840 crq.request_capability.number =
de89e854 2841 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2842 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2843 ibmvnic_send_crq(adapter, &crq);
2844
2845 crq.request_capability.capability =
2846 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2847 crq.request_capability.number =
de89e854 2848 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2849 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2850 ibmvnic_send_crq(adapter, &crq);
2851
2852 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2853 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2854 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2855 ibmvnic_send_crq(adapter, &crq);
2856
2857 if (adapter->netdev->flags & IFF_PROMISC) {
2858 if (adapter->promisc_supported) {
2859 crq.request_capability.capability =
2860 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2861 crq.request_capability.number = cpu_to_be64(1);
901e040a 2862 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2863 ibmvnic_send_crq(adapter, &crq);
2864 }
2865 } else {
2866 crq.request_capability.capability =
2867 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2868 crq.request_capability.number = cpu_to_be64(0);
901e040a 2869 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2870 ibmvnic_send_crq(adapter, &crq);
2871 }
032c5e82
TF		 2872}
2873
2874static int pending_scrq(struct ibmvnic_adapter *adapter,
2875 struct ibmvnic_sub_crq_queue *scrq)
2876{
2877 union sub_crq *entry = &scrq->msgs[scrq->cur];
2878
1cf9cc72 2879 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
032c5e82
TF		 2880 return 1;
2881 else
2882 return 0;
2883}
2884
2885static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2886 struct ibmvnic_sub_crq_queue *scrq)
2887{
2888 union sub_crq *entry;
2889 unsigned long flags;
2890
2891 spin_lock_irqsave(&scrq->lock, flags);
2892 entry = &scrq->msgs[scrq->cur];
2893 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2894 if (++scrq->cur == scrq->size)
2895 scrq->cur = 0;
2896 } else {
2897 entry = NULL;
2898 }
2899 spin_unlock_irqrestore(&scrq->lock, flags);
2900
2901 return entry;
2902}
2903
2904static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2905{
2906 struct ibmvnic_crq_queue *queue = &adapter->crq;
2907 union ibmvnic_crq *crq;
2908
2909 crq = &queue->msgs[queue->cur];
2910 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2911 if (++queue->cur == queue->size)
2912 queue->cur = 0;
2913 } else {
2914 crq = NULL;
2915 }
2916
2917 return crq;
2918}
2919
2920static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2921 union sub_crq *sub_crq)
2922{
2923 unsigned int ua = adapter->vdev->unit_address;
2924 struct device *dev = &adapter->vdev->dev;
2925 u64 *u64_crq = (u64 *)sub_crq;
2926 int rc;
2927
2928 netdev_dbg(adapter->netdev,
2929 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2930 (unsigned long int)cpu_to_be64(remote_handle),
2931 (unsigned long int)cpu_to_be64(u64_crq[0]),
2932 (unsigned long int)cpu_to_be64(u64_crq[1]),
2933 (unsigned long int)cpu_to_be64(u64_crq[2]),
2934 (unsigned long int)cpu_to_be64(u64_crq[3]));
2935
2936 /* Make sure the hypervisor sees the complete request */
2937 mb();
2938
2939 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2940 cpu_to_be64(remote_handle),
2941 cpu_to_be64(u64_crq[0]),
2942 cpu_to_be64(u64_crq[1]),
2943 cpu_to_be64(u64_crq[2]),
2944 cpu_to_be64(u64_crq[3]));
2945
2946 if (rc) {
2947 if (rc == H_CLOSED)
2948 dev_warn(dev, "CRQ Queue closed\n");
2949 dev_err(dev, "Send error (rc=%d)\n", rc);
2950 }
2951
2952 return rc;
2953}
2954
ad7775dc
TF		 2955static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2956 u64 remote_handle, u64 ioba, u64 num_entries)
2957{
2958 unsigned int ua = adapter->vdev->unit_address;
2959 struct device *dev = &adapter->vdev->dev;
2960 int rc;
2961
2962 /* Make sure the hypervisor sees the complete request */
2963 mb();
2964 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2965 cpu_to_be64(remote_handle),
2966 ioba, num_entries);
2967
2968 if (rc) {
2969 if (rc == H_CLOSED)
2970 dev_warn(dev, "CRQ Queue closed\n");
2971 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2972 }
2973
2974 return rc;
2975}
2976
032c5e82
TF		 2977static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2978 union ibmvnic_crq *crq)
2979{
2980 unsigned int ua = adapter->vdev->unit_address;
2981 struct device *dev = &adapter->vdev->dev;
2982 u64 *u64_crq = (u64 *)crq;
2983 int rc;
2984
2985 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2986 (unsigned long int)cpu_to_be64(u64_crq[0]),
2987 (unsigned long int)cpu_to_be64(u64_crq[1]));
2988
2989 /* Make sure the hypervisor sees the complete request */
2990 mb();
2991
2992 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2993 cpu_to_be64(u64_crq[0]),
2994 cpu_to_be64(u64_crq[1]));
2995
2996 if (rc) {
ec95dffa 2997 if (rc == H_CLOSED) {
032c5e82 2998 dev_warn(dev, "CRQ Queue closed\n");
ec95dffa
NF		 2999 if (adapter->resetting)
3000 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3001 }
3002
032c5e82
TF		 3003 dev_warn(dev, "Send error (rc=%d)\n", rc);
3004 }
3005
3006 return rc;
3007}
3008
3009static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3010{
3011 union ibmvnic_crq crq;
3012
3013 memset(&crq, 0, sizeof(crq));
3014 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3015 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3016 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3017
3018 return ibmvnic_send_crq(adapter, &crq);
3019}
3020
032c5e82
TF		 3021static int send_version_xchg(struct ibmvnic_adapter *adapter)
3022{
3023 union ibmvnic_crq crq;
3024
3025 memset(&crq, 0, sizeof(crq));
3026 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3027 crq.version_exchange.cmd = VERSION_EXCHANGE;
3028 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3029
3030 return ibmvnic_send_crq(adapter, &crq);
3031}
3032
37798d02
NF		 3033struct vnic_login_client_data {
3034 u8 type;
3035 __be16 len;
3036 char name;
3037} __packed;
3038
3039static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3040{
3041 int len;
3042
3043 /* Calculate the amount of buffer space needed for the
3044 * vnic client data in the login buffer. There are four entries,
3045 * OS name, LPAR name, device name, and a null last entry.
3046 */
3047 len = 4 * sizeof(struct vnic_login_client_data);
3048 len += 6; /* "Linux" plus NULL */
3049 len += strlen(utsname()->nodename) + 1;
3050 len += strlen(adapter->netdev->name) + 1;
3051
3052 return len;
3053}
3054
3055static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3056 struct vnic_login_client_data *vlcd)
3057{
3058 const char *os_name = "Linux";
3059 int len;
3060
3061 /* Type 1 - LPAR OS */
3062 vlcd->type = 1;
3063 len = strlen(os_name) + 1;
3064 vlcd->len = cpu_to_be16(len);
3065 strncpy(&vlcd->name, os_name, len);
3066 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3067
3068 /* Type 2 - LPAR name */
3069 vlcd->type = 2;
3070 len = strlen(utsname()->nodename) + 1;
3071 vlcd->len = cpu_to_be16(len);
3072 strncpy(&vlcd->name, utsname()->nodename, len);
3073 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3074
3075 /* Type 3 - device name */
3076 vlcd->type = 3;
3077 len = strlen(adapter->netdev->name) + 1;
3078 vlcd->len = cpu_to_be16(len);
3079 strncpy(&vlcd->name, adapter->netdev->name, len);
3080}
3081
032c5e82
TF		 3082static void send_login(struct ibmvnic_adapter *adapter)
3083{
3084 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3085 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 3086 struct device *dev = &adapter->vdev->dev;
3087 dma_addr_t rsp_buffer_token;
3088 dma_addr_t buffer_token;
3089 size_t rsp_buffer_size;
3090 union ibmvnic_crq crq;
032c5e82
TF		 3091 size_t buffer_size;
3092 __be64 *tx_list_p;
3093 __be64 *rx_list_p;
37798d02
NF		 3094 int client_data_len;
3095 struct vnic_login_client_data *vlcd;
032c5e82
TF		 3096 int i;
3097
34f0f4e3 3098 release_login_rsp_buffer(adapter);
37798d02
NF		 3099 client_data_len = vnic_client_data_len(adapter);
3100
032c5e82
TF		 3101 buffer_size =
3102 sizeof(struct ibmvnic_login_buffer) +
37798d02
NF		 3103 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3104 client_data_len;
032c5e82 3105
37798d02 3106 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
032c5e82
TF		 3107 if (!login_buffer)
3108 goto buf_alloc_failed;
3109
3110 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3111 DMA_TO_DEVICE);
3112 if (dma_mapping_error(dev, buffer_token)) {
3113 dev_err(dev, "Couldn't map login buffer\n");
3114 goto buf_map_failed;
3115 }
3116
498cd8e4
JA		 3117 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3118 sizeof(u64) * adapter->req_tx_queues +
3119 sizeof(u64) * adapter->req_rx_queues +
3120 sizeof(u64) * adapter->req_rx_queues +
3121 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 3122
3123 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3124 if (!login_rsp_buffer)
3125 goto buf_rsp_alloc_failed;
3126
3127 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3128 rsp_buffer_size, DMA_FROM_DEVICE);
3129 if (dma_mapping_error(dev, rsp_buffer_token)) {
3130 dev_err(dev, "Couldn't map login rsp buffer\n");
3131 goto buf_rsp_map_failed;
3132 }
661a2622 3133
032c5e82
TF		 3134 adapter->login_buf = login_buffer;
3135 adapter->login_buf_token = buffer_token;
3136 adapter->login_buf_sz = buffer_size;
3137 adapter->login_rsp_buf = login_rsp_buffer;
3138 adapter->login_rsp_buf_token = rsp_buffer_token;
3139 adapter->login_rsp_buf_sz = rsp_buffer_size;
3140
3141 login_buffer->len = cpu_to_be32(buffer_size);
3142 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3143 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3144 login_buffer->off_txcomp_subcrqs =
3145 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3146 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3147 login_buffer->off_rxcomp_subcrqs =
3148 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3149 sizeof(u64) * adapter->req_tx_queues);
3150 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3151 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3152
3153 tx_list_p = (__be64 *)((char *)login_buffer +
3154 sizeof(struct ibmvnic_login_buffer));
3155 rx_list_p = (__be64 *)((char *)login_buffer +
3156 sizeof(struct ibmvnic_login_buffer) +
3157 sizeof(u64) * adapter->req_tx_queues);
3158
3159 for (i = 0; i < adapter->req_tx_queues; i++) {
3160 if (adapter->tx_scrq[i]) {
3161 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3162 crq_num);
3163 }
3164 }
3165
3166 for (i = 0; i < adapter->req_rx_queues; i++) {
3167 if (adapter->rx_scrq[i]) {
3168 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3169 crq_num);
3170 }
3171 }
3172
37798d02
NF		 3173 /* Insert vNIC login client data */
3174 vlcd = (struct vnic_login_client_data *)
3175 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3176 login_buffer->client_data_offset =
3177 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3178 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3179
3180 vnic_add_client_data(adapter, vlcd);
3181
032c5e82
TF		 3182 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3183 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3184 netdev_dbg(adapter->netdev, "%016lx\n",
3185 ((unsigned long int *)(adapter->login_buf))[i]);
3186 }
3187
3188 memset(&crq, 0, sizeof(crq));
3189 crq.login.first = IBMVNIC_CRQ_CMD;
3190 crq.login.cmd = LOGIN;
3191 crq.login.ioba = cpu_to_be32(buffer_token);
3192 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 3193 ibmvnic_send_crq(adapter, &crq);
3194
3195 return;
3196
032c5e82
TF		 3197buf_rsp_map_failed:
3198 kfree(login_rsp_buffer);
3199buf_rsp_alloc_failed:
3200 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3201buf_map_failed:
3202 kfree(login_buffer);
3203buf_alloc_failed:
3204 return;
3205}
3206
3207static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3208 u32 len, u8 map_id)
3209{
3210 union ibmvnic_crq crq;
3211
3212 memset(&crq, 0, sizeof(crq));
3213 crq.request_map.first = IBMVNIC_CRQ_CMD;
3214 crq.request_map.cmd = REQUEST_MAP;
3215 crq.request_map.map_id = map_id;
3216 crq.request_map.ioba = cpu_to_be32(addr);
3217 crq.request_map.len = cpu_to_be32(len);
3218 ibmvnic_send_crq(adapter, &crq);
3219}
3220
3221static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3222{
3223 union ibmvnic_crq crq;
3224
3225 memset(&crq, 0, sizeof(crq));
3226 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3227 crq.request_unmap.cmd = REQUEST_UNMAP;
3228 crq.request_unmap.map_id = map_id;
3229 ibmvnic_send_crq(adapter, &crq);
3230}
3231
3232static void send_map_query(struct ibmvnic_adapter *adapter)
3233{
3234 union ibmvnic_crq crq;
3235
3236 memset(&crq, 0, sizeof(crq));
3237 crq.query_map.first = IBMVNIC_CRQ_CMD;
3238 crq.query_map.cmd = QUERY_MAP;
3239 ibmvnic_send_crq(adapter, &crq);
3240}
3241
3242/* Send a series of CRQs requesting various capabilities of the VNIC server */
3243static void send_cap_queries(struct ibmvnic_adapter *adapter)
3244{
3245 union ibmvnic_crq crq;
3246
901e040a 3247 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 3248 memset(&crq, 0, sizeof(crq));
3249 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3250 crq.query_capability.cmd = QUERY_CAPABILITY;
3251
3252 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 3253 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3254 ibmvnic_send_crq(adapter, &crq);
3255
3256 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 3257 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3258 ibmvnic_send_crq(adapter, &crq);
3259
3260 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 3261 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3262 ibmvnic_send_crq(adapter, &crq);
3263
3264 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 3265 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3266 ibmvnic_send_crq(adapter, &crq);
3267
3268 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 3269 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3270 ibmvnic_send_crq(adapter, &crq);
3271
3272 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 3273 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3274 ibmvnic_send_crq(adapter, &crq);
3275
3276 crq.query_capability.capability =
3277 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 3278 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3279 ibmvnic_send_crq(adapter, &crq);
3280
3281 crq.query_capability.capability =
3282 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3283 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3284 ibmvnic_send_crq(adapter, &crq);
3285
3286 crq.query_capability.capability =
3287 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 3288 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3289 ibmvnic_send_crq(adapter, &crq);
3290
3291 crq.query_capability.capability =
3292 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3293 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3294 ibmvnic_send_crq(adapter, &crq);
3295
3296 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 3297 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3298 ibmvnic_send_crq(adapter, &crq);
3299
3300 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 3301 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3302 ibmvnic_send_crq(adapter, &crq);
3303
3304 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 3305 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3306 ibmvnic_send_crq(adapter, &crq);
3307
3308 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 3309 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3310 ibmvnic_send_crq(adapter, &crq);
3311
3312 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 3313 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3314 ibmvnic_send_crq(adapter, &crq);
3315
3316 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 3317 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3318 ibmvnic_send_crq(adapter, &crq);
3319
6052d5e2
MFV		 3320 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3321 atomic_inc(&adapter->running_cap_crqs);
3322 ibmvnic_send_crq(adapter, &crq);
3323
032c5e82 3324 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 3325 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3326 ibmvnic_send_crq(adapter, &crq);
3327
3328 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 3329 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3330 ibmvnic_send_crq(adapter, &crq);
3331
3332 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 3333 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3334 ibmvnic_send_crq(adapter, &crq);
3335
3336 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 3337 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3338 ibmvnic_send_crq(adapter, &crq);
3339
3340 crq.query_capability.capability =
3341 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 3342 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3343 ibmvnic_send_crq(adapter, &crq);
3344
3345 crq.query_capability.capability =
3346 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 3347 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3348 ibmvnic_send_crq(adapter, &crq);
3349
3350 crq.query_capability.capability =
3351 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 3352 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3353 ibmvnic_send_crq(adapter, &crq);
3354
3355 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 3356 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3357 ibmvnic_send_crq(adapter, &crq);
3358}
3359
4e6759be
DANR		 3360static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3361 struct ibmvnic_adapter *adapter)
3362{
3363 struct device *dev = &adapter->vdev->dev;
3364
3365 if (crq->get_vpd_size_rsp.rc.code) {
3366 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3367 crq->get_vpd_size_rsp.rc.code);
3368 complete(&adapter->fw_done);
3369 return;
3370 }
3371
3372 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3373 complete(&adapter->fw_done);
3374}
3375
3376static void handle_vpd_rsp(union ibmvnic_crq *crq,
3377 struct ibmvnic_adapter *adapter)
3378{
3379 struct device *dev = &adapter->vdev->dev;
21a2545b 3380 unsigned char *substr = NULL;
4e6759be
DANR		 3381 u8 fw_level_len = 0;
3382
3383 memset(adapter->fw_version, 0, 32);
3384
3385 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3386 DMA_FROM_DEVICE);
3387
3388 if (crq->get_vpd_rsp.rc.code) {
3389 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3390 crq->get_vpd_rsp.rc.code);
3391 goto complete;
3392 }
3393
3394 /* get the position of the firmware version info
3395 * located after the ASCII 'RM' substring in the buffer
3396 */
3397 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3398 if (!substr) {
a107311d 3399 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4e6759be
DANR		 3400 goto complete;
3401 }
3402
3403 /* get length of firmware level ASCII substring */
3404 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3405 fw_level_len = *(substr + 2);
3406 } else {
3407 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3408 goto complete;
3409 }
3410
3411 /* copy firmware version string from vpd into adapter */
3412 if ((substr + 3 + fw_level_len) <
3413 (adapter->vpd->buff + adapter->vpd->len)) {
21a2545b 3414 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4e6759be
DANR		 3415 } else {
3416 dev_info(dev, "FW substr extrapolated VPD buff\n");
3417 }
3418
3419complete:
21a2545b
DANR		 3420 if (adapter->fw_version[0] == '\0')
3421 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4e6759be
DANR		 3422 complete(&adapter->fw_done);
3423}
3424
032c5e82
TF		 3425static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3426{
3427 struct device *dev = &adapter->vdev->dev;
3428 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3429 union ibmvnic_crq crq;
3430 int i;
3431
3432 dma_unmap_single(dev, adapter->ip_offload_tok,
3433 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3434
3435 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3436 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3437 netdev_dbg(adapter->netdev, "%016lx\n",
3438 ((unsigned long int *)(buf))[i]);
3439
3440 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3441 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3442 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3443 buf->tcp_ipv4_chksum);
3444 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3445 buf->tcp_ipv6_chksum);
3446 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3447 buf->udp_ipv4_chksum);
3448 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3449 buf->udp_ipv6_chksum);
3450 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3451 buf->large_tx_ipv4);
3452 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3453 buf->large_tx_ipv6);
3454 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3455 buf->large_rx_ipv4);
3456 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3457 buf->large_rx_ipv6);
3458 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3459 buf->max_ipv4_header_size);
3460 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3461 buf->max_ipv6_header_size);
3462 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3463 buf->max_tcp_header_size);
3464 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3465 buf->max_udp_header_size);
3466 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3467 buf->max_large_tx_size);
3468 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3469 buf->max_large_rx_size);
3470 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3471 buf->ipv6_extension_header);
3472 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3473 buf->tcp_pseudosum_req);
3474 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3475 buf->num_ipv6_ext_headers);
3476 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3477 buf->off_ipv6_ext_headers);
3478
3479 adapter->ip_offload_ctrl_tok =
3480 dma_map_single(dev, &adapter->ip_offload_ctrl,
3481 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3482
3483 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3484 dev_err(dev, "Couldn't map ip offload control buffer\n");
3485 return;
3486 }
3487
f6897943
TF		 3488 adapter->ip_offload_ctrl.len =
3489 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
032c5e82 3490 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
f6897943
TF		 3491 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3492 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
032c5e82
TF		 3493 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3494 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3495 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3496 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
fdb06105
TF		 3497 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3498 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
032c5e82 3499
fdb06105 3500 /* large_rx disabled for now, additional features needed */
032c5e82
TF		 3501 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3502 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3503
15482056 3504 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
032c5e82
TF		 3505
3506 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3507 adapter->netdev->features |= NETIF_F_IP_CSUM;
3508
3509 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3510 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3511
9be02cdf
TF		 3512 if ((adapter->netdev->features &
3513 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3514 adapter->netdev->features |= NETIF_F_RXCSUM;
3515
fdb06105
TF		 3516 if (buf->large_tx_ipv4)
3517 adapter->netdev->features |= NETIF_F_TSO;
3518 if (buf->large_tx_ipv6)
3519 adapter->netdev->features |= NETIF_F_TSO6;
3520
aa0bf851
TF		 3521 adapter->netdev->hw_features |= adapter->netdev->features;
3522
032c5e82
TF		 3523 memset(&crq, 0, sizeof(crq));
3524 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3525 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3526 crq.control_ip_offload.len =
3527 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3528 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3529 ibmvnic_send_crq(adapter, &crq);
3530}
3531
3532static void handle_error_info_rsp(union ibmvnic_crq *crq,
3533 struct ibmvnic_adapter *adapter)
3534{
3535 struct device *dev = &adapter->vdev->dev;
96183182 3536 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 3537 unsigned long flags;
3538 bool found = false;
3539 int i;
3540
3541 if (!crq->request_error_rsp.rc.code) {
3542 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3543 crq->request_error_rsp.rc.code);
3544 return;
3545 }
3546
3547 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 3548 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 3549 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3550 found = true;
3551 list_del(&error_buff->list);
3552 break;
3553 }
3554 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3555
3556 if (!found) {
3557 dev_err(dev, "Couldn't find error id %x\n",
75224c93 3558 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3559 return;
3560 }
3561
3562 dev_err(dev, "Detailed info for error id %x:",
75224c93 3563 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3564
3565 for (i = 0; i < error_buff->len; i++) {
3566 pr_cont("%02x", (int)error_buff->buff[i]);
3567 if (i % 8 == 7)
3568 pr_cont(" ");
3569 }
3570 pr_cont("\n");
3571
3572 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3573 DMA_FROM_DEVICE);
3574 kfree(error_buff->buff);
3575 kfree(error_buff);
3576}
3577
2f9de9ba
NF		 3578static void request_error_information(struct ibmvnic_adapter *adapter,
3579 union ibmvnic_crq *err_crq)
032c5e82 3580{
032c5e82 3581 struct device *dev = &adapter->vdev->dev;
2f9de9ba 3582 struct net_device *netdev = adapter->netdev;
032c5e82 3583 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 3584 unsigned long timeout = msecs_to_jiffies(30000);
3585 union ibmvnic_crq crq;
032c5e82 3586 unsigned long flags;
2f9de9ba 3587 int rc, detail_len;
032c5e82
TF		 3588
3589 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3590 if (!error_buff)
3591 return;
3592
2f9de9ba 3593 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 3594 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3595 if (!error_buff->buff) {
3596 kfree(error_buff);
3597 return;
3598 }
3599
3600 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3601 DMA_FROM_DEVICE);
3602 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 3603 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 3604 kfree(error_buff->buff);
3605 kfree(error_buff);
3606 return;
3607 }
3608
032c5e82 3609 error_buff->len = detail_len;
2f9de9ba 3610 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 3611
3612 spin_lock_irqsave(&adapter->error_list_lock, flags);
3613 list_add_tail(&error_buff->list, &adapter->errors);
3614 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3615
2f9de9ba
NF		 3616 memset(&crq, 0, sizeof(crq));
3617 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3618 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3619 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3620 crq.request_error_info.len = cpu_to_be32(detail_len);
3621 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3622
3623 rc = ibmvnic_send_crq(adapter, &crq);
3624 if (rc) {
3625 netdev_err(netdev, "failed to request error information\n");
3626 goto err_info_fail;
3627 }
3628
3629 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3630 netdev_err(netdev, "timeout waiting for error information\n");
3631 goto err_info_fail;
3632 }
3633
3634 return;
3635
3636err_info_fail:
3637 spin_lock_irqsave(&adapter->error_list_lock, flags);
3638 list_del(&error_buff->list);
3639 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3640
3641 kfree(error_buff->buff);
3642 kfree(error_buff);
3643}
3644
3645static void handle_error_indication(union ibmvnic_crq *crq,
3646 struct ibmvnic_adapter *adapter)
3647{
3648 struct device *dev = &adapter->vdev->dev;
3649
3650 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3651 crq->error_indication.flags
3652 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3653 be32_to_cpu(crq->error_indication.error_id),
3654 be16_to_cpu(crq->error_indication.error_cause));
3655
3656 if (be32_to_cpu(crq->error_indication.error_id))
3657 request_error_information(adapter, crq);
ed651a10
NF		 3658
3659 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3660 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 3661 else
3662 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 3663}
3664
f813614f
TF		 3665static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3666 struct ibmvnic_adapter *adapter)
032c5e82
TF		 3667{
3668 struct net_device *netdev = adapter->netdev;
3669 struct device *dev = &adapter->vdev->dev;
3670 long rc;
3671
3672 rc = crq->change_mac_addr_rsp.rc.code;
3673 if (rc) {
3674 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
f813614f 3675 goto out;
032c5e82
TF		 3676 }
3677 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3678 ETH_ALEN);
f813614f
TF		 3679out:
3680 complete(&adapter->fw_done);
3681 return rc;
032c5e82
TF		 3682}
3683
3684static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3685 struct ibmvnic_adapter *adapter)
3686{
3687 struct device *dev = &adapter->vdev->dev;
3688 u64 *req_value;
3689 char *name;
3690
901e040a 3691 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 3692 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3693 case REQ_TX_QUEUES:
3694 req_value = &adapter->req_tx_queues;
3695 name = "tx";
3696 break;
3697 case REQ_RX_QUEUES:
3698 req_value = &adapter->req_rx_queues;
3699 name = "rx";
3700 break;
3701 case REQ_RX_ADD_QUEUES:
3702 req_value = &adapter->req_rx_add_queues;
3703 name = "rx_add";
3704 break;
3705 case REQ_TX_ENTRIES_PER_SUBCRQ:
3706 req_value = &adapter->req_tx_entries_per_subcrq;
3707 name = "tx_entries_per_subcrq";
3708 break;
3709 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3710 req_value = &adapter->req_rx_add_entries_per_subcrq;
3711 name = "rx_add_entries_per_subcrq";
3712 break;
3713 case REQ_MTU:
3714 req_value = &adapter->req_mtu;
3715 name = "mtu";
3716 break;
3717 case PROMISC_REQUESTED:
3718 req_value = &adapter->promisc;
3719 name = "promisc";
3720 break;
3721 default:
3722 dev_err(dev, "Got invalid cap request rsp %d\n",
3723 crq->request_capability.capability);
3724 return;
3725 }
3726
3727 switch (crq->request_capability_rsp.rc.code) {
3728 case SUCCESS:
3729 break;
3730 case PARTIALSUCCESS:
3731 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3732 *req_value,
28f4d165 3733 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 3734 number), name);
e7913803
JA		 3735
3736 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3737 REQ_MTU) {
3738 pr_err("mtu of %llu is not supported. Reverting.\n",
3739 *req_value);
3740 *req_value = adapter->fallback.mtu;
3741 } else {
3742 *req_value =
3743 be64_to_cpu(crq->request_capability_rsp.number);
3744 }
3745
d346b9bc 3746 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 3747 return;
3748 default:
3749 dev_err(dev, "Error %d in request cap rsp\n",
3750 crq->request_capability_rsp.rc.code);
3751 return;
3752 }
3753
3754 /* Done receiving requested capabilities, query IP offload support */
901e040a 3755 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 3756 union ibmvnic_crq newcrq;
3757 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3758 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3759 &adapter->ip_offload_buf;
3760
249168ad 3761 adapter->wait_capability = false;
032c5e82
TF		 3762 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3763 buf_sz,
3764 DMA_FROM_DEVICE);
3765
3766 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3767 if (!firmware_has_feature(FW_FEATURE_CMO))
3768 dev_err(dev, "Couldn't map offload buffer\n");
3769 return;
3770 }
3771
3772 memset(&newcrq, 0, sizeof(newcrq));
3773 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3774 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3775 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3776 newcrq.query_ip_offload.ioba =
3777 cpu_to_be32(adapter->ip_offload_tok);
3778
3779 ibmvnic_send_crq(adapter, &newcrq);
3780 }
3781}
3782
3783static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3784 struct ibmvnic_adapter *adapter)
3785{
3786 struct device *dev = &adapter->vdev->dev;
c26eba03 3787 struct net_device *netdev = adapter->netdev;
032c5e82
TF		 3788 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3789 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 3790 int i;
3791
3792 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3793 DMA_BIDIRECTIONAL);
3794 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3795 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3796
498cd8e4
JA		 3797 /* If the number of queues requested can't be allocated by the
3798 * server, the login response will return with code 1. We will need
3799 * to resend the login buffer with fewer queues requested.
3800 */
3801 if (login_rsp_crq->generic.rc.code) {
3802 adapter->renegotiate = true;
3803 complete(&adapter->init_done);
3804 return 0;
3805 }
3806
c26eba03
JA		 3807 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3808
032c5e82
TF		 3809 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3810 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3811 netdev_dbg(adapter->netdev, "%016lx\n",
3812 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3813 }
3814
3815 /* Sanity checks */
3816 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3817 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3818 adapter->req_rx_add_queues !=
3819 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3820 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3821 ibmvnic_remove(adapter->vdev);
3822 return -EIO;
3823 }
a2c0f039 3824 release_login_buffer(adapter);
032c5e82
TF		 3825 complete(&adapter->init_done);
3826
032c5e82
TF		 3827 return 0;
3828}
3829
032c5e82
TF		 3830static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3831 struct ibmvnic_adapter *adapter)
3832{
3833 struct device *dev = &adapter->vdev->dev;
3834 long rc;
3835
3836 rc = crq->request_unmap_rsp.rc.code;
3837 if (rc)
3838 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3839}
3840
3841static void handle_query_map_rsp(union ibmvnic_crq *crq,
3842 struct ibmvnic_adapter *adapter)
3843{
3844 struct net_device *netdev = adapter->netdev;
3845 struct device *dev = &adapter->vdev->dev;
3846 long rc;
3847
3848 rc = crq->query_map_rsp.rc.code;
3849 if (rc) {
3850 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3851 return;
3852 }
3853 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3854 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3855 crq->query_map_rsp.free_pages);
3856}
3857
3858static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3859 struct ibmvnic_adapter *adapter)
3860{
3861 struct net_device *netdev = adapter->netdev;
3862 struct device *dev = &adapter->vdev->dev;
3863 long rc;
3864
901e040a 3865 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3866 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3867 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3868 rc = crq->query_capability.rc.code;
3869 if (rc) {
3870 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3871 goto out;
3872 }
3873
3874 switch (be16_to_cpu(crq->query_capability.capability)) {
3875 case MIN_TX_QUEUES:
3876 adapter->min_tx_queues =
de89e854 3877 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3878 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3879 adapter->min_tx_queues);
3880 break;
3881 case MIN_RX_QUEUES:
3882 adapter->min_rx_queues =
de89e854 3883 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3884 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3885 adapter->min_rx_queues);
3886 break;
3887 case MIN_RX_ADD_QUEUES:
3888 adapter->min_rx_add_queues =
de89e854 3889 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3890 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3891 adapter->min_rx_add_queues);
3892 break;
3893 case MAX_TX_QUEUES:
3894 adapter->max_tx_queues =
de89e854 3895 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3896 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3897 adapter->max_tx_queues);
3898 break;
3899 case MAX_RX_QUEUES:
3900 adapter->max_rx_queues =
de89e854 3901 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3902 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3903 adapter->max_rx_queues);
3904 break;
3905 case MAX_RX_ADD_QUEUES:
3906 adapter->max_rx_add_queues =
de89e854 3907 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3908 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3909 adapter->max_rx_add_queues);
3910 break;
3911 case MIN_TX_ENTRIES_PER_SUBCRQ:
3912 adapter->min_tx_entries_per_subcrq =
de89e854 3913 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3914 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3915 adapter->min_tx_entries_per_subcrq);
3916 break;
3917 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3918 adapter->min_rx_add_entries_per_subcrq =
de89e854 3919 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3920 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3921 adapter->min_rx_add_entries_per_subcrq);
3922 break;
3923 case MAX_TX_ENTRIES_PER_SUBCRQ:
3924 adapter->max_tx_entries_per_subcrq =
de89e854 3925 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3926 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3927 adapter->max_tx_entries_per_subcrq);
3928 break;
3929 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3930 adapter->max_rx_add_entries_per_subcrq =
de89e854 3931 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3932 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3933 adapter->max_rx_add_entries_per_subcrq);
3934 break;
3935 case TCP_IP_OFFLOAD:
3936 adapter->tcp_ip_offload =
de89e854 3937 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3938 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3939 adapter->tcp_ip_offload);
3940 break;
3941 case PROMISC_SUPPORTED:
3942 adapter->promisc_supported =
de89e854 3943 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3944 netdev_dbg(netdev, "promisc_supported = %lld\n",
3945 adapter->promisc_supported);
3946 break;
3947 case MIN_MTU:
de89e854 3948 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3949 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3950 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3951 break;
3952 case MAX_MTU:
de89e854 3953 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3954 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3955 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3956 break;
3957 case MAX_MULTICAST_FILTERS:
3958 adapter->max_multicast_filters =
de89e854 3959 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3960 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3961 adapter->max_multicast_filters);
3962 break;
3963 case VLAN_HEADER_INSERTION:
3964 adapter->vlan_header_insertion =
de89e854 3965 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3966 if (adapter->vlan_header_insertion)
3967 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3968 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3969 adapter->vlan_header_insertion);
3970 break;
6052d5e2
MFV		 3971 case RX_VLAN_HEADER_INSERTION:
3972 adapter->rx_vlan_header_insertion =
3973 be64_to_cpu(crq->query_capability.number);
3974 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3975 adapter->rx_vlan_header_insertion);
3976 break;
032c5e82
TF		 3977 case MAX_TX_SG_ENTRIES:
3978 adapter->max_tx_sg_entries =
de89e854 3979 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3980 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3981 adapter->max_tx_sg_entries);
3982 break;
3983 case RX_SG_SUPPORTED:
3984 adapter->rx_sg_supported =
de89e854 3985 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3986 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3987 adapter->rx_sg_supported);
3988 break;
3989 case OPT_TX_COMP_SUB_QUEUES:
3990 adapter->opt_tx_comp_sub_queues =
de89e854 3991 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3992 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3993 adapter->opt_tx_comp_sub_queues);
3994 break;
3995 case OPT_RX_COMP_QUEUES:
3996 adapter->opt_rx_comp_queues =
de89e854 3997 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3998 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3999 adapter->opt_rx_comp_queues);
4000 break;
4001 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4002 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 4003 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4004 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4005 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4006 break;
4007 case OPT_TX_ENTRIES_PER_SUBCRQ:
4008 adapter->opt_tx_entries_per_subcrq =
de89e854 4009 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4010 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4011 adapter->opt_tx_entries_per_subcrq);
4012 break;
4013 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4014 adapter->opt_rxba_entries_per_subcrq =
de89e854 4015 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4016 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4017 adapter->opt_rxba_entries_per_subcrq);
4018 break;
4019 case TX_RX_DESC_REQ:
4020 adapter->tx_rx_desc_req = crq->query_capability.number;
4021 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4022 adapter->tx_rx_desc_req);
4023 break;
4024
4025 default:
4026 netdev_err(netdev, "Got invalid cap rsp %d\n",
4027 crq->query_capability.capability);
4028 }
4029
4030out:
249168ad
TF		 4031 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4032 adapter->wait_capability = false;
d346b9bc 4033 ibmvnic_send_req_caps(adapter, 0);
249168ad 4034 }
032c5e82
TF		 4035}
4036
032c5e82
TF		 4037static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4038 struct ibmvnic_adapter *adapter)
4039{
4040 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4041 struct net_device *netdev = adapter->netdev;
4042 struct device *dev = &adapter->vdev->dev;
993a82b0 4043 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 4044 long rc;
4045
4046 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 4047 (unsigned long int)cpu_to_be64(u64_crq[0]),
4048 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 4049 switch (gen_crq->first) {
4050 case IBMVNIC_CRQ_INIT_RSP:
4051 switch (gen_crq->cmd) {
4052 case IBMVNIC_CRQ_INIT:
4053 dev_info(dev, "Partner initialized\n");
017892c1
JA		 4054 adapter->from_passive_init = true;
4055 complete(&adapter->init_done);
032c5e82
TF		 4056 break;
4057 case IBMVNIC_CRQ_INIT_COMPLETE:
4058 dev_info(dev, "Partner initialization complete\n");
4059 send_version_xchg(adapter);
4060 break;
4061 default:
4062 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4063 }
4064 return;
4065 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 4066 netif_carrier_off(netdev);
032c5e82 4067 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 4068 dev_info(dev, "Migrated, re-enabling adapter\n");
4069 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 4070 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4071 dev_info(dev, "Backing device failover detected\n");
ed651a10 4072 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 4073 } else {
4074 /* The adapter lost the connection */
4075 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4076 gen_crq->cmd);
ed651a10 4077 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 4078 }
4079 return;
4080 case IBMVNIC_CRQ_CMD_RSP:
4081 break;
4082 default:
4083 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4084 gen_crq->first);
4085 return;
4086 }
4087
4088 switch (gen_crq->cmd) {
4089 case VERSION_EXCHANGE_RSP:
4090 rc = crq->version_exchange_rsp.rc.code;
4091 if (rc) {
4092 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4093 break;
4094 }
4095 dev_info(dev, "Partner protocol version is %d\n",
4096 crq->version_exchange_rsp.version);
4097 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4098 ibmvnic_version)
4099 ibmvnic_version =
4100 be16_to_cpu(crq->version_exchange_rsp.version);
4101 send_cap_queries(adapter);
4102 break;
4103 case QUERY_CAPABILITY_RSP:
4104 handle_query_cap_rsp(crq, adapter);
4105 break;
4106 case QUERY_MAP_RSP:
4107 handle_query_map_rsp(crq, adapter);
4108 break;
4109 case REQUEST_MAP_RSP:
f3be0cbc
TF		 4110 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4111 complete(&adapter->fw_done);
032c5e82
TF		 4112 break;
4113 case REQUEST_UNMAP_RSP:
4114 handle_request_unmap_rsp(crq, adapter);
4115 break;
4116 case REQUEST_CAPABILITY_RSP:
4117 handle_request_cap_rsp(crq, adapter);
4118 break;
4119 case LOGIN_RSP:
4120 netdev_dbg(netdev, "Got Login Response\n");
4121 handle_login_rsp(crq, adapter);
4122 break;
4123 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 4124 netdev_dbg(netdev,
4125 "Got Logical Link State Response, state: %d rc: %d\n",
4126 crq->logical_link_state_rsp.link_state,
4127 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 4128 adapter->logical_link_state =
4129 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 4130 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4131 complete(&adapter->init_done);
032c5e82
TF		 4132 break;
4133 case LINK_STATE_INDICATION:
4134 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4135 adapter->phys_link_state =
4136 crq->link_state_indication.phys_link_state;
4137 adapter->logical_link_state =
4138 crq->link_state_indication.logical_link_state;
4139 break;
4140 case CHANGE_MAC_ADDR_RSP:
4141 netdev_dbg(netdev, "Got MAC address change Response\n");
f813614f 4142 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
032c5e82
TF		 4143 break;
4144 case ERROR_INDICATION:
4145 netdev_dbg(netdev, "Got Error Indication\n");
4146 handle_error_indication(crq, adapter);
4147 break;
4148 case REQUEST_ERROR_RSP:
4149 netdev_dbg(netdev, "Got Error Detail Response\n");
4150 handle_error_info_rsp(crq, adapter);
4151 break;
4152 case REQUEST_STATISTICS_RSP:
4153 netdev_dbg(netdev, "Got Statistics Response\n");
4154 complete(&adapter->stats_done);
4155 break;
032c5e82
TF		 4156 case QUERY_IP_OFFLOAD_RSP:
4157 netdev_dbg(netdev, "Got Query IP offload Response\n");
4158 handle_query_ip_offload_rsp(adapter);
4159 break;
4160 case MULTICAST_CTRL_RSP:
4161 netdev_dbg(netdev, "Got multicast control Response\n");
4162 break;
4163 case CONTROL_IP_OFFLOAD_RSP:
4164 netdev_dbg(netdev, "Got Control IP offload Response\n");
4165 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4166 sizeof(adapter->ip_offload_ctrl),
4167 DMA_TO_DEVICE);
bd0b6723 4168 complete(&adapter->init_done);
032c5e82 4169 break;
032c5e82
TF		 4170 case COLLECT_FW_TRACE_RSP:
4171 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4172 complete(&adapter->fw_done);
4173 break;
4e6759be
DANR		 4174 case GET_VPD_SIZE_RSP:
4175 handle_vpd_size_rsp(crq, adapter);
4176 break;
4177 case GET_VPD_RSP:
4178 handle_vpd_rsp(crq, adapter);
4179 break;
032c5e82
TF		 4180 default:
4181 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4182 gen_crq->cmd);
4183 }
4184}
4185
4186static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4187{
4188 struct ibmvnic_adapter *adapter = instance;
6c267b3d 4189
6c267b3d 4190 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 4191 return IRQ_HANDLED;
4192}
4193
4194static void ibmvnic_tasklet(void *data)
4195{
4196 struct ibmvnic_adapter *adapter = data;
032c5e82 4197 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 4198 union ibmvnic_crq *crq;
4199 unsigned long flags;
4200 bool done = false;
4201
4202 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 4203 while (!done) {
4204 /* Pull all the valid messages off the CRQ */
4205 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4206 ibmvnic_handle_crq(crq, adapter);
4207 crq->generic.first = 0;
4208 }
ed7ecbf7
BK		 4209
4210 /* remain in tasklet until all
4211 * capabilities responses are received
4212 */
4213 if (!adapter->wait_capability)
4214 done = true;
032c5e82 4215 }
249168ad
TF		 4216 /* if capabilities CRQ's were sent in this tasklet, the following
4217 * tasklet must wait until all responses are received
4218 */
4219 if (atomic_read(&adapter->running_cap_crqs) != 0)
4220 adapter->wait_capability = true;
032c5e82 4221 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 4222}
4223
4224static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4225{
4226 struct vio_dev *vdev = adapter->vdev;
4227 int rc;
4228
4229 do {
4230 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4231 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4232
4233 if (rc)
4234 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4235
4236 return rc;
4237}
4238
4239static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4240{
4241 struct ibmvnic_crq_queue *crq = &adapter->crq;
4242 struct device *dev = &adapter->vdev->dev;
4243 struct vio_dev *vdev = adapter->vdev;
4244 int rc;
4245
4246 /* Close the CRQ */
4247 do {
4248 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4249 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4250
4251 /* Clean out the queue */
4252 memset(crq->msgs, 0, PAGE_SIZE);
4253 crq->cur = 0;
4254
4255 /* And re-open it again */
4256 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4257 crq->msg_token, PAGE_SIZE);
4258
4259 if (rc == H_CLOSED)
4260 /* Adapter is good, but other end is not ready */
4261 dev_warn(dev, "Partner adapter not ready\n");
4262 else if (rc != 0)
4263 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4264
4265 return rc;
4266}
4267
f992887c 4268static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4269{
4270 struct ibmvnic_crq_queue *crq = &adapter->crq;
4271 struct vio_dev *vdev = adapter->vdev;
4272 long rc;
4273
f992887c
NF		 4274 if (!crq->msgs)
4275 return;
4276
032c5e82
TF		 4277 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4278 free_irq(vdev->irq, adapter);
6c267b3d 4279 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4280 do {
4281 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4282 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4283
4284 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4285 DMA_BIDIRECTIONAL);
4286 free_page((unsigned long)crq->msgs);
f992887c 4287 crq->msgs = NULL;
032c5e82
TF		 4288}
4289
f992887c 4290static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4291{
4292 struct ibmvnic_crq_queue *crq = &adapter->crq;
4293 struct device *dev = &adapter->vdev->dev;
4294 struct vio_dev *vdev = adapter->vdev;
4295 int rc, retrc = -ENOMEM;
4296
f992887c
NF		 4297 if (crq->msgs)
4298 return 0;
4299
032c5e82
TF		 4300 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4301 /* Should we allocate more than one page? */
4302
4303 if (!crq->msgs)
4304 return -ENOMEM;
4305
4306 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4307 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4308 DMA_BIDIRECTIONAL);
4309 if (dma_mapping_error(dev, crq->msg_token))
4310 goto map_failed;
4311
4312 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4313 crq->msg_token, PAGE_SIZE);
4314
4315 if (rc == H_RESOURCE)
4316 /* maybe kexecing and resource is busy. try a reset */
4317 rc = ibmvnic_reset_crq(adapter);
4318 retrc = rc;
4319
4320 if (rc == H_CLOSED) {
4321 dev_warn(dev, "Partner adapter not ready\n");
4322 } else if (rc) {
4323 dev_warn(dev, "Error %d opening adapter\n", rc);
4324 goto reg_crq_failed;
4325 }
4326
4327 retrc = 0;
4328
6c267b3d
TF		 4329 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4330 (unsigned long)adapter);
4331
032c5e82
TF		 4332 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4333 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4334 adapter);
4335 if (rc) {
4336 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4337 vdev->irq, rc);
4338 goto req_irq_failed;
4339 }
4340
4341 rc = vio_enable_interrupts(vdev);
4342 if (rc) {
4343 dev_err(dev, "Error %d enabling interrupts\n", rc);
4344 goto req_irq_failed;
4345 }
4346
4347 crq->cur = 0;
4348 spin_lock_init(&crq->lock);
4349
4350 return retrc;
4351
4352req_irq_failed:
6c267b3d 4353 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4354 do {
4355 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4356 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4357reg_crq_failed:
4358 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4359map_failed:
4360 free_page((unsigned long)crq->msgs);
f992887c 4361 crq->msgs = NULL;
032c5e82
TF		 4362 return retrc;
4363}
4364
f6ef6408 4365static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 4366{
f6ef6408 4367 struct device *dev = &adapter->vdev->dev;
ea22d51a 4368 unsigned long timeout = msecs_to_jiffies(30000);
d7c0ef36 4369 u64 old_num_rx_queues, old_num_tx_queues;
f6ef6408
JA		 4370 int rc;
4371
c26eba03 4372 if (adapter->resetting && !adapter->wait_for_reset) {
28cde751
NF		 4373 rc = ibmvnic_reset_crq(adapter);
4374 if (!rc)
4375 rc = vio_enable_interrupts(adapter->vdev);
4376 } else {
4377 rc = init_crq_queue(adapter);
4378 }
4379
f6ef6408
JA		 4380 if (rc) {
4381 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4382 return rc;
4383 }
4384
017892c1
JA		 4385 adapter->from_passive_init = false;
4386
d7c0ef36
NF		 4387 old_num_rx_queues = adapter->req_rx_queues;
4388 old_num_tx_queues = adapter->req_tx_queues;
4389
f6ef6408 4390 init_completion(&adapter->init_done);
6a2fb0e9 4391 adapter->init_done_rc = 0;
f6ef6408
JA		 4392 ibmvnic_send_crq_init(adapter);
4393 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4394 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 4395 return -1;
4396 }
4397
6a2fb0e9
NF		 4398 if (adapter->init_done_rc) {
4399 release_crq_queue(adapter);
4400 return adapter->init_done_rc;
4401 }
4402
017892c1
JA		 4403 if (adapter->from_passive_init) {
4404 adapter->state = VNIC_OPEN;
4405 adapter->from_passive_init = false;
f6ef6408
JA		 4406 return -1;
4407 }
4408
d7c0ef36
NF		 4409 if (adapter->resetting && !adapter->wait_for_reset) {
4410 if (adapter->req_rx_queues != old_num_rx_queues ||
4411 adapter->req_tx_queues != old_num_tx_queues) {
4412 release_sub_crqs(adapter, 0);
4413 rc = init_sub_crqs(adapter);
4414 } else {
4415 rc = reset_sub_crq_queues(adapter);
4416 }
4417 } else {
57a49436 4418 rc = init_sub_crqs(adapter);
d7c0ef36
NF		 4419 }
4420
1bb3c739
NF		 4421 if (rc) {
4422 dev_err(dev, "Initialization of sub crqs failed\n");
4423 release_crq_queue(adapter);
5df969c3
TF		 4424 return rc;
4425 }
4426
4427 rc = init_sub_crq_irqs(adapter);
4428 if (rc) {
4429 dev_err(dev, "Failed to initialize sub crq irqs\n");
4430 release_crq_queue(adapter);
1bb3c739
NF		 4431 }
4432
4433 return rc;
f6ef6408
JA		 4434}
4435
40c9db8a
TF		 4436static struct device_attribute dev_attr_failover;
4437
f6ef6408
JA		 4438static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4439{
032c5e82
TF		 4440 struct ibmvnic_adapter *adapter;
4441 struct net_device *netdev;
4442 unsigned char *mac_addr_p;
032c5e82
TF		 4443 int rc;
4444
4445 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4446 dev->unit_address);
4447
4448 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4449 VETH_MAC_ADDR, NULL);
4450 if (!mac_addr_p) {
4451 dev_err(&dev->dev,
4452 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4453 __FILE__, __LINE__);
4454 return 0;
4455 }
4456
4457 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
d45cc3a4 4458 IBMVNIC_MAX_QUEUES);
032c5e82
TF		 4459 if (!netdev)
4460 return -ENOMEM;
4461
4462 adapter = netdev_priv(netdev);
90c8014c 4463 adapter->state = VNIC_PROBING;
032c5e82
TF		 4464 dev_set_drvdata(&dev->dev, netdev);
4465 adapter->vdev = dev;
4466 adapter->netdev = netdev;
4467
4468 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4469 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4470 netdev->irq = dev->irq;
4471 netdev->netdev_ops = &ibmvnic_netdev_ops;
4472 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4473 SET_NETDEV_DEV(netdev, &dev->dev);
4474
4475 spin_lock_init(&adapter->stats_lock);
4476
032c5e82 4477 INIT_LIST_HEAD(&adapter->errors);
032c5e82 4478 spin_lock_init(&adapter->error_list_lock);
032c5e82 4479
ed651a10
NF		 4480 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4481 INIT_LIST_HEAD(&adapter->rwi_list);
4482 mutex_init(&adapter->reset_lock);
4483 mutex_init(&adapter->rwi_lock);
4484 adapter->resetting = false;
4485
c26eba03
JA		 4486 adapter->mac_change_pending = false;
4487
6a2fb0e9
NF		 4488 do {
4489 rc = ibmvnic_init(adapter);
7c1885ae
NF		 4490 if (rc && rc != EAGAIN)
4491 goto ibmvnic_init_fail;
6a2fb0e9 4492 } while (rc == EAGAIN);
032c5e82 4493
f39f0d1e 4494 netdev->mtu = adapter->req_mtu - ETH_HLEN;
c26eba03
JA		 4495 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4496 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82 4497
40c9db8a 4498 rc = device_create_file(&dev->dev, &dev_attr_failover);
7c1885ae
NF		 4499 if (rc)
4500 goto ibmvnic_init_fail;
40c9db8a 4501
e876a8a7 4502 netif_carrier_off(netdev);
032c5e82
TF		 4503 rc = register_netdev(netdev);
4504 if (rc) {
4505 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
7c1885ae 4506 goto ibmvnic_register_fail;
032c5e82
TF		 4507 }
4508 dev_info(&dev->dev, "ibmvnic registered\n");
4509
90c8014c 4510 adapter->state = VNIC_PROBED;
c26eba03
JA		 4511
4512 adapter->wait_for_reset = false;
4513
032c5e82 4514 return 0;
7c1885ae
NF		 4515
4516ibmvnic_register_fail:
4517 device_remove_file(&dev->dev, &dev_attr_failover);
4518
4519ibmvnic_init_fail:
d7c0ef36 4520 release_sub_crqs(adapter, 1);
7c1885ae
NF		 4521 release_crq_queue(adapter);
4522 free_netdev(netdev);
4523
4524 return rc;
032c5e82
TF		 4525}
4526
4527static int ibmvnic_remove(struct vio_dev *dev)
4528{
4529 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 4530 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4531
90c8014c 4532 adapter->state = VNIC_REMOVING;
032c5e82 4533 unregister_netdev(netdev);
ed651a10 4534 mutex_lock(&adapter->reset_lock);
37489055
NF		 4535
4536 release_resources(adapter);
d7c0ef36 4537 release_sub_crqs(adapter, 1);
37489055
NF		 4538 release_crq_queue(adapter);
4539
90c8014c
NF		 4540 adapter->state = VNIC_REMOVED;
4541
ed651a10 4542 mutex_unlock(&adapter->reset_lock);
40c9db8a 4543 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 4544 free_netdev(netdev);
4545 dev_set_drvdata(&dev->dev, NULL);
4546
4547 return 0;
4548}
4549
40c9db8a
TF		 4550static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4551 const char *buf, size_t count)
4552{
4553 struct net_device *netdev = dev_get_drvdata(dev);
4554 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4555 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4556 __be64 session_token;
4557 long rc;
4558
4559 if (!sysfs_streq(buf, "1"))
4560 return -EINVAL;
4561
4562 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4563 H_GET_SESSION_TOKEN, 0, 0, 0);
4564 if (rc) {
4565 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4566 rc);
4567 return -EINVAL;
4568 }
4569
4570 session_token = (__be64)retbuf[0];
4571 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4572 be64_to_cpu(session_token));
4573 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4574 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4575 if (rc) {
4576 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4577 rc);
4578 return -EINVAL;
4579 }
4580
4581 return count;
4582}
4583
6cbaefb4 4584static DEVICE_ATTR_WO(failover);
40c9db8a 4585
032c5e82
TF		 4586static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4587{
4588 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4589 struct ibmvnic_adapter *adapter;
4590 struct iommu_table *tbl;
4591 unsigned long ret = 0;
4592 int i;
4593
4594 tbl = get_iommu_table_base(&vdev->dev);
4595
4596 /* netdev inits at probe time along with the structures we need below*/
4597 if (!netdev)
4598 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4599
4600 adapter = netdev_priv(netdev);
4601
4602 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 4603 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4604
4605 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4606 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4607
4608 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4609 i++)
4610 ret += adapter->rx_pool[i].size *
4611 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4612
4613 return ret;
4614}
4615
4616static int ibmvnic_resume(struct device *dev)
4617{
4618 struct net_device *netdev = dev_get_drvdata(dev);
4619 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4620
cb89ba24
JA		 4621 if (adapter->state != VNIC_OPEN)
4622 return 0;
4623
a248878d 4624 tasklet_schedule(&adapter->tasklet);
032c5e82
TF		 4625
4626 return 0;
4627}
4628
8c37bc67 4629static const struct vio_device_id ibmvnic_device_table[] = {
032c5e82
TF		 4630 {"network", "IBM,vnic"},
4631 {"", "" }
4632};
4633MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4634
4635static const struct dev_pm_ops ibmvnic_pm_ops = {
4636 .resume = ibmvnic_resume
4637};
4638
4639static struct vio_driver ibmvnic_driver = {
4640 .id_table = ibmvnic_device_table,
4641 .probe = ibmvnic_probe,
4642 .remove = ibmvnic_remove,
4643 .get_desired_dma = ibmvnic_get_desired_dma,
4644 .name = ibmvnic_driver_name,
4645 .pm = &ibmvnic_pm_ops,
4646};
4647
4648/* module functions */
4649static int __init ibmvnic_module_init(void)
4650{
4651 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4652 IBMVNIC_DRIVER_VERSION);
4653
4654 return vio_register_driver(&ibmvnic_driver);
4655}
4656
4657static void __exit ibmvnic_module_exit(void)
4658{
4659 vio_unregister_driver(&ibmvnic_driver);
4660}
4661
4662module_init(ibmvnic_module_init);
4663module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)