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ibmvnic: Sanitize entire SCRQ buffer on reset
[linux-2.6-block.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
62#include <linux/in.h>
63#include <linux/ip.h>
ad7775dc 64#include <linux/ipv6.h>
032c5e82
TF		 65#include <linux/irq.h>
66#include <linux/kthread.h>
67#include <linux/seq_file.h>
032c5e82
TF		 68#include <linux/interrupt.h>
69#include <net/net_namespace.h>
70#include <asm/hvcall.h>
71#include <linux/atomic.h>
72#include <asm/vio.h>
73#include <asm/iommu.h>
74#include <linux/uaccess.h>
75#include <asm/firmware.h>
65dc6891 76#include <linux/workqueue.h>
6052d5e2 77#include <linux/if_vlan.h>
032c5e82
TF		 78
79#include "ibmvnic.h"
80
81static const char ibmvnic_driver_name[] = "ibmvnic";
82static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
78b07ac1 84MODULE_AUTHOR("Santiago Leon");
032c5e82
TF		 85MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90static int ibmvnic_remove(struct vio_dev *);
91static void release_sub_crqs(struct ibmvnic_adapter *);
92static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
ad7775dc 98static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 99static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static int ibmvnic_poll(struct napi_struct *napi, int data);
109static void send_map_query(struct ibmvnic_adapter *adapter);
110static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 112static void send_login(struct ibmvnic_adapter *adapter);
113static void send_cap_queries(struct ibmvnic_adapter *adapter);
114static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 115static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 116static void release_crq_queue(struct ibmvnic_adapter *);
032c5e82
TF		 117
118struct ibmvnic_stat {
119 char name[ETH_GSTRING_LEN];
120 int offset;
121};
122
123#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
124 offsetof(struct ibmvnic_statistics, stat))
125#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
126
127static const struct ibmvnic_stat ibmvnic_stats[] = {
128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
150};
151
152static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
153 unsigned long length, unsigned long *number,
154 unsigned long *irq)
155{
156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
157 long rc;
158
159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
160 *number = retbuf[0];
161 *irq = retbuf[1];
162
163 return rc;
164}
165
8c0543ad
NF		 166static void reset_long_term_buff(struct ibmvnic_adapter *adapter,
167 struct ibmvnic_long_term_buff *ltb)
168{
169 memset(ltb->buff, 0, ltb->size);
170
171 init_completion(&adapter->fw_done);
172 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
173 wait_for_completion(&adapter->fw_done);
174}
175
032c5e82
TF		 176static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
177 struct ibmvnic_long_term_buff *ltb, int size)
178{
179 struct device *dev = &adapter->vdev->dev;
180
181 ltb->size = size;
182 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
183 GFP_KERNEL);
184
185 if (!ltb->buff) {
186 dev_err(dev, "Couldn't alloc long term buffer\n");
187 return -ENOMEM;
188 }
189 ltb->map_id = adapter->map_id;
190 adapter->map_id++;
db5d0b59
NF		 191
192 init_completion(&adapter->fw_done);
032c5e82
TF		 193 send_request_map(adapter, ltb->addr,
194 ltb->size, ltb->map_id);
032c5e82
TF		 195 wait_for_completion(&adapter->fw_done);
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
f185a49a
TF		 213static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
214{
215 int i;
216
217 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
218 i++)
219 adapter->rx_pool[i].active = 0;
220}
221
032c5e82
TF		 222static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
223 struct ibmvnic_rx_pool *pool)
224{
225 int count = pool->size - atomic_read(&pool->available);
226 struct device *dev = &adapter->vdev->dev;
227 int buffers_added = 0;
228 unsigned long lpar_rc;
229 union sub_crq sub_crq;
230 struct sk_buff *skb;
231 unsigned int offset;
232 dma_addr_t dma_addr;
233 unsigned char *dst;
234 u64 *handle_array;
235 int shift = 0;
236 int index;
237 int i;
238
f185a49a
TF		 239 if (!pool->active)
240 return;
241
032c5e82
TF		 242 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
243 be32_to_cpu(adapter->login_rsp_buf->
244 off_rxadd_subcrqs));
245
246 for (i = 0; i < count; ++i) {
247 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
248 if (!skb) {
249 dev_err(dev, "Couldn't replenish rx buff\n");
250 adapter->replenish_no_mem++;
251 break;
252 }
253
254 index = pool->free_map[pool->next_free];
255
256 if (pool->rx_buff[index].skb)
257 dev_err(dev, "Inconsistent free_map!\n");
258
259 /* Copy the skb to the long term mapped DMA buffer */
260 offset = index * pool->buff_size;
261 dst = pool->long_term_buff.buff + offset;
262 memset(dst, 0, pool->buff_size);
263 dma_addr = pool->long_term_buff.addr + offset;
264 pool->rx_buff[index].data = dst;
265
266 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
267 pool->rx_buff[index].dma = dma_addr;
268 pool->rx_buff[index].skb = skb;
269 pool->rx_buff[index].pool_index = pool->index;
270 pool->rx_buff[index].size = pool->buff_size;
271
272 memset(&sub_crq, 0, sizeof(sub_crq));
273 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
274 sub_crq.rx_add.correlator =
275 cpu_to_be64((u64)&pool->rx_buff[index]);
276 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
277 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
278
279 /* The length field of the sCRQ is defined to be 24 bits so the
280 * buffer size needs to be left shifted by a byte before it is
281 * converted to big endian to prevent the last byte from being
282 * truncated.
283 */
284#ifdef __LITTLE_ENDIAN__
285 shift = 8;
286#endif
287 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
288
289 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
290 &sub_crq);
291 if (lpar_rc != H_SUCCESS)
292 goto failure;
293
294 buffers_added++;
295 adapter->replenish_add_buff_success++;
296 pool->next_free = (pool->next_free + 1) % pool->size;
297 }
298 atomic_add(buffers_added, &pool->available);
299 return;
300
301failure:
302 dev_info(dev, "replenish pools failure\n");
303 pool->free_map[pool->next_free] = index;
304 pool->rx_buff[index].skb = NULL;
305 if (!dma_mapping_error(dev, dma_addr))
306 dma_unmap_single(dev, dma_addr, pool->buff_size,
307 DMA_FROM_DEVICE);
308
309 dev_kfree_skb_any(skb);
310 adapter->replenish_add_buff_failure++;
311 atomic_add(buffers_added, &pool->available);
f185a49a
TF		 312
313 if (lpar_rc == H_CLOSED) {
314 /* Disable buffer pool replenishment and report carrier off if
315 * queue is closed. Firmware guarantees that a signal will
316 * be sent to the driver, triggering a reset.
317 */
318 deactivate_rx_pools(adapter);
319 netif_carrier_off(adapter->netdev);
320 }
032c5e82
TF		 321}
322
323static void replenish_pools(struct ibmvnic_adapter *adapter)
324{
325 int i;
326
032c5e82
TF		 327 adapter->replenish_task_cycles++;
328 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
329 i++) {
330 if (adapter->rx_pool[i].active)
331 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
332 }
333}
334
7bbc27a4
NF		 335static void release_stats_token(struct ibmvnic_adapter *adapter)
336{
337 struct device *dev = &adapter->vdev->dev;
338
339 if (!adapter->stats_token)
340 return;
341
342 dma_unmap_single(dev, adapter->stats_token,
343 sizeof(struct ibmvnic_statistics),
344 DMA_FROM_DEVICE);
345 adapter->stats_token = 0;
346}
347
348static int init_stats_token(struct ibmvnic_adapter *adapter)
349{
350 struct device *dev = &adapter->vdev->dev;
351 dma_addr_t stok;
352
353 stok = dma_map_single(dev, &adapter->stats,
354 sizeof(struct ibmvnic_statistics),
355 DMA_FROM_DEVICE);
356 if (dma_mapping_error(dev, stok)) {
357 dev_err(dev, "Couldn't map stats buffer\n");
358 return -1;
359 }
360
361 adapter->stats_token = stok;
362 return 0;
363}
364
8c0543ad
NF		 365static int reset_rx_pools(struct ibmvnic_adapter *adapter)
366{
367 struct ibmvnic_rx_pool *rx_pool;
368 int rx_scrqs;
369 int i, j;
370
371 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
372 for (i = 0; i < rx_scrqs; i++) {
373 rx_pool = &adapter->rx_pool[i];
374
375 reset_long_term_buff(adapter, &rx_pool->long_term_buff);
376
377 for (j = 0; j < rx_pool->size; j++)
378 rx_pool->free_map[j] = j;
379
380 memset(rx_pool->rx_buff, 0,
381 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
382
383 atomic_set(&rx_pool->available, 0);
384 rx_pool->next_alloc = 0;
385 rx_pool->next_free = 0;
c3e53b9a 386 rx_pool->active = 1;
8c0543ad
NF		 387 }
388
389 return 0;
390}
391
0ffe2cb7 392static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 393{
0ffe2cb7
NF		 394 struct ibmvnic_rx_pool *rx_pool;
395 int rx_scrqs;
396 int i, j;
032c5e82 397
0ffe2cb7 398 if (!adapter->rx_pool)
032c5e82
TF		 399 return;
400
0ffe2cb7
NF		 401 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
402 for (i = 0; i < rx_scrqs; i++) {
403 rx_pool = &adapter->rx_pool[i];
404
405 kfree(rx_pool->free_map);
406 free_long_term_buff(adapter, &rx_pool->long_term_buff);
407
408 if (!rx_pool->rx_buff)
e0ebe942 409 continue;
0ffe2cb7
NF		 410
411 for (j = 0; j < rx_pool->size; j++) {
412 if (rx_pool->rx_buff[j].skb) {
413 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
414 rx_pool->rx_buff[i].skb = NULL;
415 }
416 }
417
418 kfree(rx_pool->rx_buff);
419 }
420
421 kfree(adapter->rx_pool);
422 adapter->rx_pool = NULL;
423}
424
425static int init_rx_pools(struct net_device *netdev)
426{
427 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
428 struct device *dev = &adapter->vdev->dev;
429 struct ibmvnic_rx_pool *rx_pool;
430 int rxadd_subcrqs;
431 u64 *size_array;
432 int i, j;
433
434 rxadd_subcrqs =
435 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
436 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
437 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
438
439 adapter->rx_pool = kcalloc(rxadd_subcrqs,
440 sizeof(struct ibmvnic_rx_pool),
441 GFP_KERNEL);
442 if (!adapter->rx_pool) {
443 dev_err(dev, "Failed to allocate rx pools\n");
444 return -1;
445 }
446
447 for (i = 0; i < rxadd_subcrqs; i++) {
448 rx_pool = &adapter->rx_pool[i];
449
450 netdev_dbg(adapter->netdev,
451 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
452 i, adapter->req_rx_add_entries_per_subcrq,
453 be64_to_cpu(size_array[i]));
454
455 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
456 rx_pool->index = i;
457 rx_pool->buff_size = be64_to_cpu(size_array[i]);
458 rx_pool->active = 1;
459
460 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
461 GFP_KERNEL);
462 if (!rx_pool->free_map) {
463 release_rx_pools(adapter);
464 return -1;
032c5e82 465 }
0ffe2cb7
NF		 466
467 rx_pool->rx_buff = kcalloc(rx_pool->size,
468 sizeof(struct ibmvnic_rx_buff),
469 GFP_KERNEL);
470 if (!rx_pool->rx_buff) {
471 dev_err(dev, "Couldn't alloc rx buffers\n");
472 release_rx_pools(adapter);
473 return -1;
474 }
475
476 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
477 rx_pool->size * rx_pool->buff_size)) {
478 release_rx_pools(adapter);
479 return -1;
480 }
481
482 for (j = 0; j < rx_pool->size; ++j)
483 rx_pool->free_map[j] = j;
484
485 atomic_set(&rx_pool->available, 0);
486 rx_pool->next_alloc = 0;
487 rx_pool->next_free = 0;
032c5e82 488 }
0ffe2cb7
NF		 489
490 return 0;
032c5e82
TF		 491}
492
8c0543ad
NF		 493static int reset_tx_pools(struct ibmvnic_adapter *adapter)
494{
495 struct ibmvnic_tx_pool *tx_pool;
496 int tx_scrqs;
497 int i, j;
498
499 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
500 for (i = 0; i < tx_scrqs; i++) {
501 tx_pool = &adapter->tx_pool[i];
502
503 reset_long_term_buff(adapter, &tx_pool->long_term_buff);
504
505 memset(tx_pool->tx_buff, 0,
506 adapter->req_tx_entries_per_subcrq *
507 sizeof(struct ibmvnic_tx_buff));
508
509 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
510 tx_pool->free_map[j] = j;
511
512 tx_pool->consumer_index = 0;
513 tx_pool->producer_index = 0;
514 }
515
516 return 0;
517}
518
c657e32c
NF		 519static void release_tx_pools(struct ibmvnic_adapter *adapter)
520{
521 struct ibmvnic_tx_pool *tx_pool;
522 int i, tx_scrqs;
523
524 if (!adapter->tx_pool)
525 return;
526
527 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
528 for (i = 0; i < tx_scrqs; i++) {
529 tx_pool = &adapter->tx_pool[i];
530 kfree(tx_pool->tx_buff);
531 free_long_term_buff(adapter, &tx_pool->long_term_buff);
532 kfree(tx_pool->free_map);
533 }
534
535 kfree(adapter->tx_pool);
536 adapter->tx_pool = NULL;
537}
538
539static int init_tx_pools(struct net_device *netdev)
540{
541 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
542 struct device *dev = &adapter->vdev->dev;
543 struct ibmvnic_tx_pool *tx_pool;
544 int tx_subcrqs;
545 int i, j;
546
547 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
548 adapter->tx_pool = kcalloc(tx_subcrqs,
549 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
550 if (!adapter->tx_pool)
551 return -1;
552
553 for (i = 0; i < tx_subcrqs; i++) {
554 tx_pool = &adapter->tx_pool[i];
555 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
556 sizeof(struct ibmvnic_tx_buff),
557 GFP_KERNEL);
558 if (!tx_pool->tx_buff) {
559 dev_err(dev, "tx pool buffer allocation failed\n");
560 release_tx_pools(adapter);
561 return -1;
562 }
563
564 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
565 adapter->req_tx_entries_per_subcrq *
566 adapter->req_mtu)) {
567 release_tx_pools(adapter);
568 return -1;
569 }
570
571 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
572 sizeof(int), GFP_KERNEL);
573 if (!tx_pool->free_map) {
574 release_tx_pools(adapter);
575 return -1;
576 }
577
578 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
579 tx_pool->free_map[j] = j;
580
581 tx_pool->consumer_index = 0;
582 tx_pool->producer_index = 0;
583 }
584
585 return 0;
586}
587
661a2622
NF		 588static void release_error_buffers(struct ibmvnic_adapter *adapter)
589{
590 struct device *dev = &adapter->vdev->dev;
591 struct ibmvnic_error_buff *error_buff, *tmp;
592 unsigned long flags;
593
594 spin_lock_irqsave(&adapter->error_list_lock, flags);
595 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
596 list_del(&error_buff->list);
597 dma_unmap_single(dev, error_buff->dma, error_buff->len,
598 DMA_FROM_DEVICE);
599 kfree(error_buff->buff);
600 kfree(error_buff);
601 }
602 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
603}
604
d944c3d6
JA		 605static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
606{
607 int i;
608
609 if (adapter->napi_enabled)
610 return;
611
612 for (i = 0; i < adapter->req_rx_queues; i++)
613 napi_enable(&adapter->napi[i]);
614
615 adapter->napi_enabled = true;
616}
617
618static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
619{
620 int i;
621
622 if (!adapter->napi_enabled)
623 return;
624
625 for (i = 0; i < adapter->req_rx_queues; i++)
626 napi_disable(&adapter->napi[i]);
627
628 adapter->napi_enabled = false;
629}
630
a57a5d25 631static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 632{
633 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 634 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 635 struct device *dev = &adapter->vdev->dev;
032c5e82 636
bd0b6723
JA		 637 do {
638 if (adapter->renegotiate) {
639 adapter->renegotiate = false;
b510888f 640 release_sub_crqs(adapter);
bd0b6723
JA		 641
642 reinit_completion(&adapter->init_done);
643 send_cap_queries(adapter);
644 if (!wait_for_completion_timeout(&adapter->init_done,
645 timeout)) {
646 dev_err(dev, "Capabilities query timeout\n");
647 return -1;
648 }
649 }
650
651 reinit_completion(&adapter->init_done);
652 send_login(adapter);
653 if (!wait_for_completion_timeout(&adapter->init_done,
654 timeout)) {
655 dev_err(dev, "Login timeout\n");
656 return -1;
657 }
658 } while (adapter->renegotiate);
659
a57a5d25
JA		 660 return 0;
661}
662
1b8955ee
NF		 663static void release_resources(struct ibmvnic_adapter *adapter)
664{
c7bac00b
NF		 665 int i;
666
1b8955ee
NF		 667 release_tx_pools(adapter);
668 release_rx_pools(adapter);
669
1b8955ee 670 release_stats_token(adapter);
661a2622 671 release_error_buffers(adapter);
c7bac00b
NF		 672
673 if (adapter->napi) {
674 for (i = 0; i < adapter->req_rx_queues; i++) {
675 if (&adapter->napi[i])
676 netif_napi_del(&adapter->napi[i]);
677 }
678 }
1b8955ee
NF		 679}
680
53da09e9
NF		 681static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
682{
683 struct net_device *netdev = adapter->netdev;
684 unsigned long timeout = msecs_to_jiffies(30000);
685 union ibmvnic_crq crq;
686 bool resend;
687 int rc;
688
53da09e9
NF		 689 netdev_err(netdev, "setting link state %d\n", link_state);
690 memset(&crq, 0, sizeof(crq));
691 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
692 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
693 crq.logical_link_state.link_state = link_state;
694
695 do {
696 resend = false;
697
698 reinit_completion(&adapter->init_done);
699 rc = ibmvnic_send_crq(adapter, &crq);
700 if (rc) {
701 netdev_err(netdev, "Failed to set link state\n");
702 return rc;
703 }
704
705 if (!wait_for_completion_timeout(&adapter->init_done,
706 timeout)) {
707 netdev_err(netdev, "timeout setting link state\n");
708 return -1;
709 }
710
711 if (adapter->init_done_rc == 1) {
712 /* Partuial success, delay and re-send */
713 mdelay(1000);
714 resend = true;
715 }
716 } while (resend);
717
718 return 0;
719}
720
7f3c6e6b
TF		 721static int set_real_num_queues(struct net_device *netdev)
722{
723 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
724 int rc;
725
726 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
727 if (rc) {
728 netdev_err(netdev, "failed to set the number of tx queues\n");
729 return rc;
730 }
731
732 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
733 if (rc)
734 netdev_err(netdev, "failed to set the number of rx queues\n");
735
736 return rc;
737}
738
bfc32f29 739static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 740{
bfc32f29
NF		 741 struct net_device *netdev = adapter->netdev;
742 int i, rc;
a57a5d25 743
7f3c6e6b
TF		 744 rc = set_real_num_queues(netdev);
745 if (rc)
746 return rc;
bd0b6723
JA		 747
748 rc = init_sub_crq_irqs(adapter);
749 if (rc) {
bfc32f29 750 netdev_err(netdev, "failed to initialize sub crq irqs\n");
bd0b6723
JA		 751 return -1;
752 }
753
5d5e84eb
NF		 754 rc = init_stats_token(adapter);
755 if (rc)
756 return rc;
757
032c5e82
TF		 758 adapter->map_id = 1;
759 adapter->napi = kcalloc(adapter->req_rx_queues,
760 sizeof(struct napi_struct), GFP_KERNEL);
761 if (!adapter->napi)
bfc32f29
NF		 762 return -ENOMEM;
763
032c5e82
TF		 764 for (i = 0; i < adapter->req_rx_queues; i++) {
765 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
766 NAPI_POLL_WEIGHT);
032c5e82 767 }
032c5e82 768
032c5e82 769 send_map_query(adapter);
0ffe2cb7
NF		 770
771 rc = init_rx_pools(netdev);
772 if (rc)
bfc32f29 773 return rc;
032c5e82 774
c657e32c 775 rc = init_tx_pools(netdev);
bfc32f29
NF		 776 return rc;
777}
778
ed651a10 779static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 780{
781 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 782 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 783 int i, rc;
784
90c8014c 785 adapter->state = VNIC_OPENING;
032c5e82 786 replenish_pools(adapter);
d944c3d6 787 ibmvnic_napi_enable(adapter);
bfc32f29 788
032c5e82
TF		 789 /* We're ready to receive frames, enable the sub-crq interrupts and
790 * set the logical link state to up
791 */
ed651a10
NF		 792 for (i = 0; i < adapter->req_rx_queues; i++) {
793 if (prev_state == VNIC_CLOSED)
794 enable_irq(adapter->rx_scrq[i]->irq);
795 else
796 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
797 }
032c5e82 798
ed651a10
NF		 799 for (i = 0; i < adapter->req_tx_queues; i++) {
800 if (prev_state == VNIC_CLOSED)
801 enable_irq(adapter->tx_scrq[i]->irq);
802 else
803 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
804 }
032c5e82 805
53da09e9 806 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 807 if (rc) {
808 for (i = 0; i < adapter->req_rx_queues; i++)
809 napi_disable(&adapter->napi[i]);
810 release_resources(adapter);
ed651a10 811 return rc;
bfc32f29 812 }
032c5e82 813
ed651a10
NF		 814 netif_tx_start_all_queues(netdev);
815
816 if (prev_state == VNIC_CLOSED) {
817 for (i = 0; i < adapter->req_rx_queues; i++)
818 napi_schedule(&adapter->napi[i]);
819 }
820
821 adapter->state = VNIC_OPEN;
822 return rc;
823}
824
825static int ibmvnic_open(struct net_device *netdev)
826{
827 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
828 int rc;
829
830 mutex_lock(&adapter->reset_lock);
831
832 if (adapter->state != VNIC_CLOSED) {
833 rc = ibmvnic_login(netdev);
834 if (rc) {
835 mutex_unlock(&adapter->reset_lock);
836 return rc;
837 }
838
839 rc = init_resources(adapter);
840 if (rc) {
841 netdev_err(netdev, "failed to initialize resources\n");
842 release_resources(adapter);
843 mutex_unlock(&adapter->reset_lock);
844 return rc;
845 }
846 }
847
848 rc = __ibmvnic_open(netdev);
849 mutex_unlock(&adapter->reset_lock);
850
bfc32f29 851 return rc;
032c5e82
TF		 852}
853
b41b83e9
NF		 854static void clean_tx_pools(struct ibmvnic_adapter *adapter)
855{
856 struct ibmvnic_tx_pool *tx_pool;
857 u64 tx_entries;
858 int tx_scrqs;
859 int i, j;
860
861 if (!adapter->tx_pool)
862 return;
863
864 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
865 tx_entries = adapter->req_tx_entries_per_subcrq;
866
867 /* Free any remaining skbs in the tx buffer pools */
868 for (i = 0; i < tx_scrqs; i++) {
869 tx_pool = &adapter->tx_pool[i];
870 if (!tx_pool)
871 continue;
872
873 for (j = 0; j < tx_entries; j++) {
874 if (tx_pool->tx_buff[j].skb) {
875 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
876 tx_pool->tx_buff[j].skb = NULL;
877 }
878 }
879 }
880}
881
ed651a10 882static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 883{
884 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 885 int rc = 0;
ea5509f5
JA		 886 int i;
887
90c8014c 888 adapter->state = VNIC_CLOSING;
4c2687a5
TF		 889
890 /* ensure that transmissions are stopped if called by do_reset */
891 if (adapter->resetting)
892 netif_tx_disable(netdev);
893 else
894 netif_tx_stop_all_queues(netdev);
895
d944c3d6 896 ibmvnic_napi_disable(adapter);
46293b94
NF		 897
898 if (adapter->tx_scrq) {
899 for (i = 0; i < adapter->req_tx_queues; i++)
900 if (adapter->tx_scrq[i]->irq)
901 disable_irq(adapter->tx_scrq[i]->irq);
902 }
903
53da09e9 904 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 905 if (rc)
906 return rc;
907
908 if (adapter->rx_scrq) {
909 for (i = 0; i < adapter->req_rx_queues; i++) {
910 int retries = 10;
911
912 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
913 retries--;
914 mdelay(100);
915
916 if (retries == 0)
917 break;
918 }
919
920 if (adapter->rx_scrq[i]->irq)
921 disable_irq(adapter->rx_scrq[i]->irq);
922 }
923 }
ea5509f5 924
10f76215 925 clean_tx_pools(adapter);
90c8014c 926 adapter->state = VNIC_CLOSED;
53da09e9 927 return rc;
032c5e82
TF		 928}
929
ed651a10
NF		 930static int ibmvnic_close(struct net_device *netdev)
931{
932 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
933 int rc;
934
935 mutex_lock(&adapter->reset_lock);
936 rc = __ibmvnic_close(netdev);
937 mutex_unlock(&adapter->reset_lock);
938
939 return rc;
940}
941
ad7775dc
TF		 942/**
943 * build_hdr_data - creates L2/L3/L4 header data buffer
944 * @hdr_field - bitfield determining needed headers
945 * @skb - socket buffer
946 * @hdr_len - array of header lengths
947 * @tot_len - total length of data
948 *
949 * Reads hdr_field to determine which headers are needed by firmware.
950 * Builds a buffer containing these headers. Saves individual header
951 * lengths and total buffer length to be used to build descriptors.
952 */
953static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
954 int *hdr_len, u8 *hdr_data)
955{
956 int len = 0;
957 u8 *hdr;
958
959 hdr_len[0] = sizeof(struct ethhdr);
960
961 if (skb->protocol == htons(ETH_P_IP)) {
962 hdr_len[1] = ip_hdr(skb)->ihl * 4;
963 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
964 hdr_len[2] = tcp_hdrlen(skb);
965 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
966 hdr_len[2] = sizeof(struct udphdr);
967 } else if (skb->protocol == htons(ETH_P_IPV6)) {
968 hdr_len[1] = sizeof(struct ipv6hdr);
969 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
970 hdr_len[2] = tcp_hdrlen(skb);
971 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
972 hdr_len[2] = sizeof(struct udphdr);
973 }
974
975 memset(hdr_data, 0, 120);
976 if ((hdr_field >> 6) & 1) {
977 hdr = skb_mac_header(skb);
978 memcpy(hdr_data, hdr, hdr_len[0]);
979 len += hdr_len[0];
980 }
981
982 if ((hdr_field >> 5) & 1) {
983 hdr = skb_network_header(skb);
984 memcpy(hdr_data + len, hdr, hdr_len[1]);
985 len += hdr_len[1];
986 }
987
988 if ((hdr_field >> 4) & 1) {
989 hdr = skb_transport_header(skb);
990 memcpy(hdr_data + len, hdr, hdr_len[2]);
991 len += hdr_len[2];
992 }
993 return len;
994}
995
996/**
997 * create_hdr_descs - create header and header extension descriptors
998 * @hdr_field - bitfield determining needed headers
999 * @data - buffer containing header data
1000 * @len - length of data buffer
1001 * @hdr_len - array of individual header lengths
1002 * @scrq_arr - descriptor array
1003 *
1004 * Creates header and, if needed, header extension descriptors and
1005 * places them in a descriptor array, scrq_arr
1006 */
1007
1008static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1009 union sub_crq *scrq_arr)
1010{
1011 union sub_crq hdr_desc;
1012 int tmp_len = len;
1013 u8 *data, *cur;
1014 int tmp;
1015
1016 while (tmp_len > 0) {
1017 cur = hdr_data + len - tmp_len;
1018
1019 memset(&hdr_desc, 0, sizeof(hdr_desc));
1020 if (cur != hdr_data) {
1021 data = hdr_desc.hdr_ext.data;
1022 tmp = tmp_len > 29 ? 29 : tmp_len;
1023 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1024 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1025 hdr_desc.hdr_ext.len = tmp;
1026 } else {
1027 data = hdr_desc.hdr.data;
1028 tmp = tmp_len > 24 ? 24 : tmp_len;
1029 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1030 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1031 hdr_desc.hdr.len = tmp;
1032 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1033 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1034 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1035 hdr_desc.hdr.flag = hdr_field << 1;
1036 }
1037 memcpy(data, cur, tmp);
1038 tmp_len -= tmp;
1039 *scrq_arr = hdr_desc;
1040 scrq_arr++;
1041 }
1042}
1043
1044/**
1045 * build_hdr_descs_arr - build a header descriptor array
1046 * @skb - socket buffer
1047 * @num_entries - number of descriptors to be sent
1048 * @subcrq - first TX descriptor
1049 * @hdr_field - bit field determining which headers will be sent
1050 *
1051 * This function will build a TX descriptor array with applicable
1052 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1053 */
1054
1055static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1056 int *num_entries, u8 hdr_field)
1057{
1058 int hdr_len[3] = {0, 0, 0};
1059 int tot_len, len;
1060 u8 *hdr_data = txbuff->hdr_data;
1061
1062 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1063 txbuff->hdr_data);
1064 len = tot_len;
1065 len -= 24;
1066 if (len > 0)
1067 num_entries += len % 29 ? len / 29 + 1 : len / 29;
1068 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1069 txbuff->indir_arr + 1);
1070}
1071
032c5e82
TF		 1072static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1073{
1074 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1075 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1076 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1077 struct device *dev = &adapter->vdev->dev;
1078 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1079 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1080 struct ibmvnic_tx_pool *tx_pool;
1081 unsigned int tx_send_failed = 0;
1082 unsigned int tx_map_failed = 0;
1083 unsigned int tx_dropped = 0;
1084 unsigned int tx_packets = 0;
1085 unsigned int tx_bytes = 0;
1086 dma_addr_t data_dma_addr;
1087 struct netdev_queue *txq;
032c5e82
TF		 1088 unsigned long lpar_rc;
1089 union sub_crq tx_crq;
1090 unsigned int offset;
ad7775dc 1091 int num_entries = 1;
032c5e82
TF		 1092 unsigned char *dst;
1093 u64 *handle_array;
1094 int index = 0;
1095 int ret = 0;
1096
ed651a10 1097 if (adapter->resetting) {
7f5b0308
TF		 1098 if (!netif_subqueue_stopped(netdev, skb))
1099 netif_stop_subqueue(netdev, queue_num);
1100 dev_kfree_skb_any(skb);
1101
032c5e82
TF		 1102 tx_send_failed++;
1103 tx_dropped++;
7f5b0308 1104 ret = NETDEV_TX_OK;
032c5e82
TF		 1105 goto out;
1106 }
1107
161b8a81
NF		 1108 tx_pool = &adapter->tx_pool[queue_num];
1109 tx_scrq = adapter->tx_scrq[queue_num];
1110 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1111 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1112 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1113
032c5e82
TF		 1114 index = tx_pool->free_map[tx_pool->consumer_index];
1115 offset = index * adapter->req_mtu;
1116 dst = tx_pool->long_term_buff.buff + offset;
1117 memset(dst, 0, adapter->req_mtu);
1118 skb_copy_from_linear_data(skb, dst, skb->len);
1119 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1120
1121 tx_pool->consumer_index =
1122 (tx_pool->consumer_index + 1) %
068d9f90 1123 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1124
1125 tx_buff = &tx_pool->tx_buff[index];
1126 tx_buff->skb = skb;
1127 tx_buff->data_dma[0] = data_dma_addr;
1128 tx_buff->data_len[0] = skb->len;
1129 tx_buff->index = index;
1130 tx_buff->pool_index = queue_num;
1131 tx_buff->last_frag = true;
032c5e82
TF		 1132
1133 memset(&tx_crq, 0, sizeof(tx_crq));
1134 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1135 tx_crq.v1.type = IBMVNIC_TX_DESC;
1136 tx_crq.v1.n_crq_elem = 1;
1137 tx_crq.v1.n_sge = 1;
1138 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1139 tx_crq.v1.correlator = cpu_to_be32(index);
1140 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1141 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1142 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1143
1144 if (adapter->vlan_header_insertion) {
1145 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1146 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1147 }
1148
1149 if (skb->protocol == htons(ETH_P_IP)) {
1150 if (ip_hdr(skb)->version == 4)
1151 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1152 else if (ip_hdr(skb)->version == 6)
1153 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1154
1155 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1156 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1157 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1158 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1159 }
1160
ad7775dc 1161 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1162 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1163 hdrs += 2;
1164 }
1165 /* determine if l2/3/4 headers are sent to firmware */
1166 if ((*hdrs >> 7) & 1 &&
1167 (skb->protocol == htons(ETH_P_IP) ||
1168 skb->protocol == htons(ETH_P_IPV6))) {
1169 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1170 tx_crq.v1.n_crq_elem = num_entries;
1171 tx_buff->indir_arr[0] = tx_crq;
1172 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1173 sizeof(tx_buff->indir_arr),
1174 DMA_TO_DEVICE);
1175 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1176 dev_kfree_skb_any(skb);
1177 tx_buff->skb = NULL;
ad7775dc
TF		 1178 if (!firmware_has_feature(FW_FEATURE_CMO))
1179 dev_err(dev, "tx: unable to map descriptor array\n");
1180 tx_map_failed++;
1181 tx_dropped++;
7f5b0308 1182 ret = NETDEV_TX_OK;
ad7775dc
TF		 1183 goto out;
1184 }
498cd8e4 1185 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1186 (u64)tx_buff->indir_dma,
1187 (u64)num_entries);
1188 } else {
498cd8e4
JA		 1189 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1190 &tx_crq);
ad7775dc 1191 }
032c5e82
TF		 1192 if (lpar_rc != H_SUCCESS) {
1193 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1194
1195 if (tx_pool->consumer_index == 0)
1196 tx_pool->consumer_index =
068d9f90 1197 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1198 else
1199 tx_pool->consumer_index--;
1200
7f5b0308
TF		 1201 dev_kfree_skb_any(skb);
1202 tx_buff->skb = NULL;
1203
b8c80b84
TF		 1204 if (lpar_rc == H_CLOSED) {
1205 /* Disable TX and report carrier off if queue is closed.
1206 * Firmware guarantees that a signal will be sent to the
1207 * driver, triggering a reset or some other action.
1208 */
1209 netif_tx_stop_all_queues(netdev);
1210 netif_carrier_off(netdev);
1211 }
7f5b0308 1212
032c5e82
TF		 1213 tx_send_failed++;
1214 tx_dropped++;
7f5b0308 1215 ret = NETDEV_TX_OK;
032c5e82
TF		 1216 goto out;
1217 }
142c0ac4 1218
58c8c0c0
BK		 1219 if (atomic_inc_return(&tx_scrq->used)
1220 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1221 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1222 netif_stop_subqueue(netdev, queue_num);
1223 }
1224
032c5e82
TF		 1225 tx_packets++;
1226 tx_bytes += skb->len;
1227 txq->trans_start = jiffies;
1228 ret = NETDEV_TX_OK;
1229
1230out:
1231 netdev->stats.tx_dropped += tx_dropped;
1232 netdev->stats.tx_bytes += tx_bytes;
1233 netdev->stats.tx_packets += tx_packets;
1234 adapter->tx_send_failed += tx_send_failed;
1235 adapter->tx_map_failed += tx_map_failed;
1236
1237 return ret;
1238}
1239
1240static void ibmvnic_set_multi(struct net_device *netdev)
1241{
1242 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1243 struct netdev_hw_addr *ha;
1244 union ibmvnic_crq crq;
1245
1246 memset(&crq, 0, sizeof(crq));
1247 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1248 crq.request_capability.cmd = REQUEST_CAPABILITY;
1249
1250 if (netdev->flags & IFF_PROMISC) {
1251 if (!adapter->promisc_supported)
1252 return;
1253 } else {
1254 if (netdev->flags & IFF_ALLMULTI) {
1255 /* Accept all multicast */
1256 memset(&crq, 0, sizeof(crq));
1257 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1258 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1259 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1260 ibmvnic_send_crq(adapter, &crq);
1261 } else if (netdev_mc_empty(netdev)) {
1262 /* Reject all multicast */
1263 memset(&crq, 0, sizeof(crq));
1264 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1265 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1266 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1267 ibmvnic_send_crq(adapter, &crq);
1268 } else {
1269 /* Accept one or more multicast(s) */
1270 netdev_for_each_mc_addr(ha, netdev) {
1271 memset(&crq, 0, sizeof(crq));
1272 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1273 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1274 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1275 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1276 ha->addr);
1277 ibmvnic_send_crq(adapter, &crq);
1278 }
1279 }
1280 }
1281}
1282
1283static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1284{
1285 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1286 struct sockaddr *addr = p;
1287 union ibmvnic_crq crq;
1288
1289 if (!is_valid_ether_addr(addr->sa_data))
1290 return -EADDRNOTAVAIL;
1291
1292 memset(&crq, 0, sizeof(crq));
1293 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1294 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1295 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1296 ibmvnic_send_crq(adapter, &crq);
1297 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1298 return 0;
1299}
1300
ed651a10
NF		 1301/**
1302 * do_reset returns zero if we are able to keep processing reset events, or
1303 * non-zero if we hit a fatal error and must halt.
1304 */
1305static int do_reset(struct ibmvnic_adapter *adapter,
1306 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1307{
ed651a10
NF		 1308 struct net_device *netdev = adapter->netdev;
1309 int i, rc;
1310
1311 netif_carrier_off(netdev);
1312 adapter->reset_reason = rwi->reset_reason;
1313
1314 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1315 rc = ibmvnic_reenable_crq_queue(adapter);
1316 if (rc)
1317 return 0;
1318 }
1319
1320 rc = __ibmvnic_close(netdev);
1321 if (rc)
1322 return rc;
1323
8cb31cfc
JA		 1324 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1325 /* remove the closed state so when we call open it appears
1326 * we are coming from the probed state.
1327 */
1328 adapter->state = VNIC_PROBED;
032c5e82 1329
8cb31cfc
JA		 1330 rc = ibmvnic_init(adapter);
1331 if (rc)
1332 return 0;
ed651a10 1333
8cb31cfc
JA		 1334 /* If the adapter was in PROBE state prior to the reset,
1335 * exit here.
1336 */
1337 if (reset_state == VNIC_PROBED)
1338 return 0;
ed651a10 1339
8cb31cfc
JA		 1340 rc = ibmvnic_login(netdev);
1341 if (rc) {
1342 adapter->state = VNIC_PROBED;
1343 return 0;
1344 }
ed651a10 1345
8c0543ad
NF		 1346 rc = reset_tx_pools(adapter);
1347 if (rc)
1348 return rc;
1349
1350 rc = reset_rx_pools(adapter);
8cb31cfc
JA		 1351 if (rc)
1352 return rc;
ed651a10 1353
8cb31cfc
JA		 1354 if (reset_state == VNIC_CLOSED)
1355 return 0;
1356 }
ed651a10
NF		 1357
1358 rc = __ibmvnic_open(netdev);
1359 if (rc) {
1360 if (list_empty(&adapter->rwi_list))
1361 adapter->state = VNIC_CLOSED;
1362 else
1363 adapter->state = reset_state;
1364
1365 return 0;
1366 }
1367
1368 netif_carrier_on(netdev);
1369
1370 /* kick napi */
1371 for (i = 0; i < adapter->req_rx_queues; i++)
1372 napi_schedule(&adapter->napi[i]);
1373
61d3e1d9
NF		 1374 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1375 netdev_notify_peers(netdev);
1376
ed651a10
NF		 1377 return 0;
1378}
1379
1380static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1381{
1382 struct ibmvnic_rwi *rwi;
1383
1384 mutex_lock(&adapter->rwi_lock);
1385
1386 if (!list_empty(&adapter->rwi_list)) {
1387 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1388 list);
1389 list_del(&rwi->list);
1390 } else {
1391 rwi = NULL;
1392 }
1393
1394 mutex_unlock(&adapter->rwi_lock);
1395 return rwi;
1396}
1397
1398static void free_all_rwi(struct ibmvnic_adapter *adapter)
1399{
1400 struct ibmvnic_rwi *rwi;
1401
1402 rwi = get_next_rwi(adapter);
1403 while (rwi) {
1404 kfree(rwi);
1405 rwi = get_next_rwi(adapter);
1406 }
1407}
1408
1409static void __ibmvnic_reset(struct work_struct *work)
1410{
1411 struct ibmvnic_rwi *rwi;
1412 struct ibmvnic_adapter *adapter;
1413 struct net_device *netdev;
1414 u32 reset_state;
1415 int rc;
1416
1417 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1418 netdev = adapter->netdev;
1419
1420 mutex_lock(&adapter->reset_lock);
1421 adapter->resetting = true;
1422 reset_state = adapter->state;
1423
1424 rwi = get_next_rwi(adapter);
1425 while (rwi) {
1426 rc = do_reset(adapter, rwi, reset_state);
1427 kfree(rwi);
1428 if (rc)
1429 break;
1430
1431 rwi = get_next_rwi(adapter);
1432 }
1433
1434 if (rc) {
1435 free_all_rwi(adapter);
6d0af07d 1436 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1437 return;
1438 }
1439
1440 adapter->resetting = false;
1441 mutex_unlock(&adapter->reset_lock);
1442}
1443
1444static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1445 enum ibmvnic_reset_reason reason)
1446{
1447 struct ibmvnic_rwi *rwi, *tmp;
1448 struct net_device *netdev = adapter->netdev;
1449 struct list_head *entry;
1450
1451 if (adapter->state == VNIC_REMOVING ||
1452 adapter->state == VNIC_REMOVED) {
1453 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1454 return;
1455 }
1456
1457 mutex_lock(&adapter->rwi_lock);
1458
1459 list_for_each(entry, &adapter->rwi_list) {
1460 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1461 if (tmp->reset_reason == reason) {
1462 netdev_err(netdev, "Matching reset found, skipping\n");
1463 mutex_unlock(&adapter->rwi_lock);
1464 return;
1465 }
1466 }
1467
1468 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1469 if (!rwi) {
1470 mutex_unlock(&adapter->rwi_lock);
1471 ibmvnic_close(netdev);
1472 return;
1473 }
1474
1475 rwi->reset_reason = reason;
1476 list_add_tail(&rwi->list, &adapter->rwi_list);
1477 mutex_unlock(&adapter->rwi_lock);
1478 schedule_work(&adapter->ibmvnic_reset);
1479}
1480
1481static void ibmvnic_tx_timeout(struct net_device *dev)
1482{
1483 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1484
1485 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1486}
1487
1488static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1489 struct ibmvnic_rx_buff *rx_buff)
1490{
1491 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1492
1493 rx_buff->skb = NULL;
1494
1495 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1496 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1497
1498 atomic_dec(&pool->available);
1499}
1500
1501static int ibmvnic_poll(struct napi_struct *napi, int budget)
1502{
1503 struct net_device *netdev = napi->dev;
1504 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1505 int scrq_num = (int)(napi - adapter->napi);
1506 int frames_processed = 0;
152ce47d
NF		 1507
1508 if (adapter->resetting)
1509 return 0;
1510
032c5e82
TF		 1511restart_poll:
1512 while (frames_processed < budget) {
1513 struct sk_buff *skb;
1514 struct ibmvnic_rx_buff *rx_buff;
1515 union sub_crq *next;
1516 u32 length;
1517 u16 offset;
1518 u8 flags = 0;
1519
1520 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1521 break;
1522 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1523 rx_buff =
1524 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1525 rx_comp.correlator);
1526 /* do error checking */
1527 if (next->rx_comp.rc) {
1528 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1529 /* free the entry */
1530 next->rx_comp.first = 0;
1531 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1532 continue;
032c5e82
TF		 1533 }
1534
1535 length = be32_to_cpu(next->rx_comp.len);
1536 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1537 flags = next->rx_comp.flags;
1538 skb = rx_buff->skb;
1539 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1540 length);
6052d5e2
MFV		 1541
1542 /* VLAN Header has been stripped by the system firmware and
1543 * needs to be inserted by the driver
1544 */
1545 if (adapter->rx_vlan_header_insertion &&
1546 (flags & IBMVNIC_VLAN_STRIPPED))
1547 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1548 ntohs(next->rx_comp.vlan_tci));
1549
032c5e82
TF		 1550 /* free the entry */
1551 next->rx_comp.first = 0;
1552 remove_buff_from_pool(adapter, rx_buff);
1553
1554 skb_put(skb, length);
1555 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1556 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1557
1558 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1559 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1560 skb->ip_summed = CHECKSUM_UNNECESSARY;
1561 }
1562
1563 length = skb->len;
1564 napi_gro_receive(napi, skb); /* send it up */
1565 netdev->stats.rx_packets++;
1566 netdev->stats.rx_bytes += length;
1567 frames_processed++;
1568 }
152ce47d
NF		 1569
1570 if (adapter->state != VNIC_CLOSING)
1571 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1572
1573 if (frames_processed < budget) {
1574 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1575 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1576 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1577 napi_reschedule(napi)) {
1578 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1579 goto restart_poll;
1580 }
1581 }
1582 return frames_processed;
1583}
1584
1585#ifdef CONFIG_NET_POLL_CONTROLLER
1586static void ibmvnic_netpoll_controller(struct net_device *dev)
1587{
1588 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1589 int i;
1590
1591 replenish_pools(netdev_priv(dev));
1592 for (i = 0; i < adapter->req_rx_queues; i++)
1593 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1594 adapter->rx_scrq[i]);
1595}
1596#endif
1597
3a807b75
JA		 1598static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1599{
1600 return -EOPNOTSUPP;
1601}
1602
032c5e82
TF		 1603static const struct net_device_ops ibmvnic_netdev_ops = {
1604 .ndo_open = ibmvnic_open,
1605 .ndo_stop = ibmvnic_close,
1606 .ndo_start_xmit = ibmvnic_xmit,
1607 .ndo_set_rx_mode = ibmvnic_set_multi,
1608 .ndo_set_mac_address = ibmvnic_set_mac,
1609 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1610 .ndo_tx_timeout = ibmvnic_tx_timeout,
1611#ifdef CONFIG_NET_POLL_CONTROLLER
1612 .ndo_poll_controller = ibmvnic_netpoll_controller,
1613#endif
3a807b75 1614 .ndo_change_mtu = ibmvnic_change_mtu,
032c5e82
TF		 1615};
1616
1617/* ethtool functions */
1618
8a43379f
PR		 1619static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1620 struct ethtool_link_ksettings *cmd)
032c5e82 1621{
8a43379f
PR		 1622 u32 supported, advertising;
1623
1624 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1625 SUPPORTED_FIBRE);
8a43379f 1626 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1627 ADVERTISED_FIBRE);
8a43379f
PR		 1628 cmd->base.speed = SPEED_1000;
1629 cmd->base.duplex = DUPLEX_FULL;
1630 cmd->base.port = PORT_FIBRE;
1631 cmd->base.phy_address = 0;
1632 cmd->base.autoneg = AUTONEG_ENABLE;
1633
1634 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1635 supported);
1636 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1637 advertising);
1638
032c5e82
TF		 1639 return 0;
1640}
1641
1642static void ibmvnic_get_drvinfo(struct net_device *dev,
1643 struct ethtool_drvinfo *info)
1644{
1645 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1646 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1647}
1648
1649static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1650{
1651 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1652
1653 return adapter->msg_enable;
1654}
1655
1656static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1657{
1658 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1659
1660 adapter->msg_enable = data;
1661}
1662
1663static u32 ibmvnic_get_link(struct net_device *netdev)
1664{
1665 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1666
1667 /* Don't need to send a query because we request a logical link up at
1668 * init and then we wait for link state indications
1669 */
1670 return adapter->logical_link_state;
1671}
1672
1673static void ibmvnic_get_ringparam(struct net_device *netdev,
1674 struct ethtool_ringparam *ring)
1675{
1676 ring->rx_max_pending = 0;
1677 ring->tx_max_pending = 0;
1678 ring->rx_mini_max_pending = 0;
1679 ring->rx_jumbo_max_pending = 0;
1680 ring->rx_pending = 0;
1681 ring->tx_pending = 0;
1682 ring->rx_mini_pending = 0;
1683 ring->rx_jumbo_pending = 0;
1684}
1685
1686static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1687{
1688 int i;
1689
1690 if (stringset != ETH_SS_STATS)
1691 return;
1692
1693 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1694 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1695}
1696
1697static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1698{
1699 switch (sset) {
1700 case ETH_SS_STATS:
1701 return ARRAY_SIZE(ibmvnic_stats);
1702 default:
1703 return -EOPNOTSUPP;
1704 }
1705}
1706
1707static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1708 struct ethtool_stats *stats, u64 *data)
1709{
1710 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1711 union ibmvnic_crq crq;
1712 int i;
1713
1714 memset(&crq, 0, sizeof(crq));
1715 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1716 crq.request_statistics.cmd = REQUEST_STATISTICS;
1717 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1718 crq.request_statistics.len =
1719 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1720
1721 /* Wait for data to be written */
1722 init_completion(&adapter->stats_done);
db5d0b59 1723 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1724 wait_for_completion(&adapter->stats_done);
1725
1726 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1727 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1728}
1729
1730static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1731 .get_drvinfo = ibmvnic_get_drvinfo,
1732 .get_msglevel = ibmvnic_get_msglevel,
1733 .set_msglevel = ibmvnic_set_msglevel,
1734 .get_link = ibmvnic_get_link,
1735 .get_ringparam = ibmvnic_get_ringparam,
1736 .get_strings = ibmvnic_get_strings,
1737 .get_sset_count = ibmvnic_get_sset_count,
1738 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1739 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1740};
1741
1742/* Routines for managing CRQs/sCRQs */
1743
57a49436
NF		 1744static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1745 struct ibmvnic_sub_crq_queue *scrq)
1746{
1747 int rc;
1748
1749 if (scrq->irq) {
1750 free_irq(scrq->irq, scrq);
1751 irq_dispose_mapping(scrq->irq);
1752 scrq->irq = 0;
1753 }
1754
c8b2ad0a 1755 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
57a49436
NF		 1756 scrq->cur = 0;
1757
1758 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1759 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1760 return rc;
1761}
1762
1763static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1764{
1765 int i, rc;
1766
1767 for (i = 0; i < adapter->req_tx_queues; i++) {
1768 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1769 if (rc)
1770 return rc;
1771 }
1772
1773 for (i = 0; i < adapter->req_rx_queues; i++) {
1774 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1775 if (rc)
1776 return rc;
1777 }
1778
1779 rc = init_sub_crq_irqs(adapter);
1780 return rc;
1781}
1782
032c5e82
TF		 1783static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1784 struct ibmvnic_sub_crq_queue *scrq)
1785{
1786 struct device *dev = &adapter->vdev->dev;
1787 long rc;
1788
1789 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1790
1791 /* Close the sub-crqs */
1792 do {
1793 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1794 adapter->vdev->unit_address,
1795 scrq->crq_num);
1796 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1797
ffa73855
TF		 1798 if (rc) {
1799 netdev_err(adapter->netdev,
1800 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1801 scrq->crq_num, rc);
1802 }
1803
032c5e82
TF		 1804 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1805 DMA_BIDIRECTIONAL);
1806 free_pages((unsigned long)scrq->msgs, 2);
1807 kfree(scrq);
1808}
1809
1810static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1811 *adapter)
1812{
1813 struct device *dev = &adapter->vdev->dev;
1814 struct ibmvnic_sub_crq_queue *scrq;
1815 int rc;
1816
1bb3c739 1817 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1818 if (!scrq)
1819 return NULL;
1820
7f7adc50 1821 scrq->msgs =
1bb3c739 1822 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1823 if (!scrq->msgs) {
1824 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1825 goto zero_page_failed;
1826 }
1827
1828 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1829 DMA_BIDIRECTIONAL);
1830 if (dma_mapping_error(dev, scrq->msg_token)) {
1831 dev_warn(dev, "Couldn't map crq queue messages page\n");
1832 goto map_failed;
1833 }
1834
1835 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1836 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1837
1838 if (rc == H_RESOURCE)
1839 rc = ibmvnic_reset_crq(adapter);
1840
1841 if (rc == H_CLOSED) {
1842 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1843 } else if (rc) {
1844 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1845 goto reg_failed;
1846 }
1847
032c5e82
TF		 1848 scrq->adapter = adapter;
1849 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1850 spin_lock_init(&scrq->lock);
1851
1852 netdev_dbg(adapter->netdev,
1853 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1854 scrq->crq_num, scrq->hw_irq, scrq->irq);
1855
1856 return scrq;
1857
032c5e82
TF		 1858reg_failed:
1859 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1860 DMA_BIDIRECTIONAL);
1861map_failed:
1862 free_pages((unsigned long)scrq->msgs, 2);
1863zero_page_failed:
1864 kfree(scrq);
1865
1866 return NULL;
1867}
1868
1869static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1870{
1871 int i;
1872
1873 if (adapter->tx_scrq) {
b510888f
NF		 1874 for (i = 0; i < adapter->req_tx_queues; i++) {
1875 if (!adapter->tx_scrq[i])
1876 continue;
1877
1878 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1879 free_irq(adapter->tx_scrq[i]->irq,
1880 adapter->tx_scrq[i]);
88eb98a0 1881 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1882 adapter->tx_scrq[i]->irq = 0;
032c5e82 1883 }
b510888f
NF		 1884
1885 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1886 }
1887
9501df3c 1888 kfree(adapter->tx_scrq);
032c5e82
TF		 1889 adapter->tx_scrq = NULL;
1890 }
1891
1892 if (adapter->rx_scrq) {
b510888f
NF		 1893 for (i = 0; i < adapter->req_rx_queues; i++) {
1894 if (!adapter->rx_scrq[i])
1895 continue;
1896
1897 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1898 free_irq(adapter->rx_scrq[i]->irq,
1899 adapter->rx_scrq[i]);
88eb98a0 1900 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1901 adapter->rx_scrq[i]->irq = 0;
032c5e82 1902 }
032c5e82 1903
b510888f
NF		 1904 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1905 }
ea22d51a 1906
b510888f 1907 kfree(adapter->rx_scrq);
ea22d51a
TF		 1908 adapter->rx_scrq = NULL;
1909 }
ea22d51a
TF		 1910}
1911
032c5e82
TF		 1912static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1913 struct ibmvnic_sub_crq_queue *scrq)
1914{
1915 struct device *dev = &adapter->vdev->dev;
1916 unsigned long rc;
1917
1918 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1919 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1920 if (rc)
1921 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1922 scrq->hw_irq, rc);
1923 return rc;
1924}
1925
1926static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1927 struct ibmvnic_sub_crq_queue *scrq)
1928{
1929 struct device *dev = &adapter->vdev->dev;
1930 unsigned long rc;
1931
1932 if (scrq->hw_irq > 0x100000000ULL) {
1933 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1934 return 1;
1935 }
1936
1937 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1938 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1939 if (rc)
1940 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1941 scrq->hw_irq, rc);
1942 return rc;
1943}
1944
1945static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1946 struct ibmvnic_sub_crq_queue *scrq)
1947{
1948 struct device *dev = &adapter->vdev->dev;
1949 struct ibmvnic_tx_buff *txbuff;
1950 union sub_crq *next;
1951 int index;
1952 int i, j;
ad7775dc 1953 u8 first;
032c5e82
TF		 1954
1955restart_loop:
1956 while (pending_scrq(adapter, scrq)) {
1957 unsigned int pool = scrq->pool_index;
1958
1959 next = ibmvnic_next_scrq(adapter, scrq);
1960 for (i = 0; i < next->tx_comp.num_comps; i++) {
1961 if (next->tx_comp.rcs[i]) {
1962 dev_err(dev, "tx error %x\n",
1963 next->tx_comp.rcs[i]);
1964 continue;
1965 }
1966 index = be32_to_cpu(next->tx_comp.correlators[i]);
1967 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1968
1969 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1970 if (!txbuff->data_dma[j])
1971 continue;
1972
1973 txbuff->data_dma[j] = 0;
032c5e82 1974 }
ad7775dc
TF		 1975 /* if sub_crq was sent indirectly */
1976 first = txbuff->indir_arr[0].generic.first;
1977 if (first == IBMVNIC_CRQ_CMD) {
1978 dma_unmap_single(dev, txbuff->indir_dma,
1979 sizeof(txbuff->indir_arr),
1980 DMA_TO_DEVICE);
1981 }
032c5e82 1982
142c0ac4 1983 if (txbuff->last_frag) {
032c5e82 1984 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 1985 txbuff->skb = NULL;
142c0ac4 1986 }
032c5e82
TF		 1987
1988 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1989 producer_index] = index;
1990 adapter->tx_pool[pool].producer_index =
1991 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1992 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1993 }
1994 /* remove tx_comp scrq*/
1995 next->tx_comp.first = 0;
7c3e7de3
NF		 1996
1997 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1998 (adapter->req_tx_entries_per_subcrq / 2) &&
1999 __netif_subqueue_stopped(adapter->netdev,
2000 scrq->pool_index)) {
2001 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2002 netdev_info(adapter->netdev, "Started queue %d\n",
2003 scrq->pool_index);
2004 }
032c5e82
TF		 2005 }
2006
2007 enable_scrq_irq(adapter, scrq);
2008
2009 if (pending_scrq(adapter, scrq)) {
2010 disable_scrq_irq(adapter, scrq);
2011 goto restart_loop;
2012 }
2013
2014 return 0;
2015}
2016
2017static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2018{
2019 struct ibmvnic_sub_crq_queue *scrq = instance;
2020 struct ibmvnic_adapter *adapter = scrq->adapter;
2021
2022 disable_scrq_irq(adapter, scrq);
2023 ibmvnic_complete_tx(adapter, scrq);
2024
2025 return IRQ_HANDLED;
2026}
2027
2028static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2029{
2030 struct ibmvnic_sub_crq_queue *scrq = instance;
2031 struct ibmvnic_adapter *adapter = scrq->adapter;
2032
2033 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2034 disable_scrq_irq(adapter, scrq);
2035 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2036 }
2037
2038 return IRQ_HANDLED;
2039}
2040
ea22d51a
TF		 2041static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2042{
2043 struct device *dev = &adapter->vdev->dev;
2044 struct ibmvnic_sub_crq_queue *scrq;
2045 int i = 0, j = 0;
2046 int rc = 0;
2047
2048 for (i = 0; i < adapter->req_tx_queues; i++) {
2049 scrq = adapter->tx_scrq[i];
2050 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2051
99c1790e 2052 if (!scrq->irq) {
ea22d51a
TF		 2053 rc = -EINVAL;
2054 dev_err(dev, "Error mapping irq\n");
2055 goto req_tx_irq_failed;
2056 }
2057
2058 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2059 0, "ibmvnic_tx", scrq);
2060
2061 if (rc) {
2062 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2063 scrq->irq, rc);
2064 irq_dispose_mapping(scrq->irq);
2065 goto req_rx_irq_failed;
2066 }
2067 }
2068
2069 for (i = 0; i < adapter->req_rx_queues; i++) {
2070 scrq = adapter->rx_scrq[i];
2071 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2072 if (!scrq->irq) {
ea22d51a
TF		 2073 rc = -EINVAL;
2074 dev_err(dev, "Error mapping irq\n");
2075 goto req_rx_irq_failed;
2076 }
2077 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2078 0, "ibmvnic_rx", scrq);
2079 if (rc) {
2080 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2081 scrq->irq, rc);
2082 irq_dispose_mapping(scrq->irq);
2083 goto req_rx_irq_failed;
2084 }
2085 }
2086 return rc;
2087
2088req_rx_irq_failed:
8bf371e6 2089 for (j = 0; j < i; j++) {
ea22d51a
TF		 2090 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2091 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2092 }
ea22d51a
TF		 2093 i = adapter->req_tx_queues;
2094req_tx_irq_failed:
8bf371e6 2095 for (j = 0; j < i; j++) {
ea22d51a
TF		 2096 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2097 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2098 }
b510888f 2099 release_sub_crqs(adapter);
ea22d51a
TF		 2100 return rc;
2101}
2102
d346b9bc 2103static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2104{
2105 struct device *dev = &adapter->vdev->dev;
2106 struct ibmvnic_sub_crq_queue **allqueues;
2107 int registered_queues = 0;
032c5e82
TF		 2108 int total_queues;
2109 int more = 0;
ea22d51a 2110 int i;
032c5e82 2111
032c5e82
TF		 2112 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2113
1bb3c739 2114 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2115 if (!allqueues)
d346b9bc 2116 return -1;
032c5e82
TF		 2117
2118 for (i = 0; i < total_queues; i++) {
2119 allqueues[i] = init_sub_crq_queue(adapter);
2120 if (!allqueues[i]) {
2121 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2122 break;
2123 }
2124 registered_queues++;
2125 }
2126
2127 /* Make sure we were able to register the minimum number of queues */
2128 if (registered_queues <
2129 adapter->min_tx_queues + adapter->min_rx_queues) {
2130 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2131 goto tx_failed;
2132 }
2133
2134 /* Distribute the failed allocated queues*/
2135 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2136 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2137 switch (i % 3) {
2138 case 0:
2139 if (adapter->req_rx_queues > adapter->min_rx_queues)
2140 adapter->req_rx_queues--;
2141 else
2142 more++;
2143 break;
2144 case 1:
2145 if (adapter->req_tx_queues > adapter->min_tx_queues)
2146 adapter->req_tx_queues--;
2147 else
2148 more++;
2149 break;
2150 }
2151 }
2152
2153 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2154 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2155 if (!adapter->tx_scrq)
2156 goto tx_failed;
2157
2158 for (i = 0; i < adapter->req_tx_queues; i++) {
2159 adapter->tx_scrq[i] = allqueues[i];
2160 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2161 }
2162
2163 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2164 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2165 if (!adapter->rx_scrq)
2166 goto rx_failed;
2167
2168 for (i = 0; i < adapter->req_rx_queues; i++) {
2169 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2170 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2171 }
2172
d346b9bc
NF		 2173 kfree(allqueues);
2174 return 0;
2175
2176rx_failed:
2177 kfree(adapter->tx_scrq);
2178 adapter->tx_scrq = NULL;
2179tx_failed:
2180 for (i = 0; i < registered_queues; i++)
2181 release_sub_crq_queue(adapter, allqueues[i]);
2182 kfree(allqueues);
2183 return -1;
2184}
2185
2186static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2187{
2188 struct device *dev = &adapter->vdev->dev;
2189 union ibmvnic_crq crq;
d346b9bc
NF		 2190
2191 if (!retry) {
2192 /* Sub-CRQ entries are 32 byte long */
2193 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2194
2195 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2196 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2197 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2198 return;
2199 }
2200
2201 /* Get the minimum between the queried max and the entries
2202 * that fit in our PAGE_SIZE
2203 */
2204 adapter->req_tx_entries_per_subcrq =
2205 adapter->max_tx_entries_per_subcrq > entries_page ?
2206 entries_page : adapter->max_tx_entries_per_subcrq;
2207 adapter->req_rx_add_entries_per_subcrq =
2208 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2209 entries_page : adapter->max_rx_add_entries_per_subcrq;
2210
2211 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2212 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2213 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2214
2215 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2216 }
2217
032c5e82
TF		 2218 memset(&crq, 0, sizeof(crq));
2219 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2220 crq.request_capability.cmd = REQUEST_CAPABILITY;
2221
2222 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2223 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2224 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2225 ibmvnic_send_crq(adapter, &crq);
2226
2227 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2228 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2229 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2230 ibmvnic_send_crq(adapter, &crq);
2231
2232 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2233 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2234 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2235 ibmvnic_send_crq(adapter, &crq);
2236
2237 crq.request_capability.capability =
2238 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2239 crq.request_capability.number =
de89e854 2240 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2241 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2242 ibmvnic_send_crq(adapter, &crq);
2243
2244 crq.request_capability.capability =
2245 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2246 crq.request_capability.number =
de89e854 2247 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2248 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2249 ibmvnic_send_crq(adapter, &crq);
2250
2251 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2252 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2253 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2254 ibmvnic_send_crq(adapter, &crq);
2255
2256 if (adapter->netdev->flags & IFF_PROMISC) {
2257 if (adapter->promisc_supported) {
2258 crq.request_capability.capability =
2259 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2260 crq.request_capability.number = cpu_to_be64(1);
901e040a 2261 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2262 ibmvnic_send_crq(adapter, &crq);
2263 }
2264 } else {
2265 crq.request_capability.capability =
2266 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2267 crq.request_capability.number = cpu_to_be64(0);
901e040a 2268 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2269 ibmvnic_send_crq(adapter, &crq);
2270 }
032c5e82
TF		 2271}
2272
2273static int pending_scrq(struct ibmvnic_adapter *adapter,
2274 struct ibmvnic_sub_crq_queue *scrq)
2275{
2276 union sub_crq *entry = &scrq->msgs[scrq->cur];
2277
90c8014c
NF		 2278 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2279 adapter->state == VNIC_CLOSING)
032c5e82
TF		 2280 return 1;
2281 else
2282 return 0;
2283}
2284
2285static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2286 struct ibmvnic_sub_crq_queue *scrq)
2287{
2288 union sub_crq *entry;
2289 unsigned long flags;
2290
2291 spin_lock_irqsave(&scrq->lock, flags);
2292 entry = &scrq->msgs[scrq->cur];
2293 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2294 if (++scrq->cur == scrq->size)
2295 scrq->cur = 0;
2296 } else {
2297 entry = NULL;
2298 }
2299 spin_unlock_irqrestore(&scrq->lock, flags);
2300
2301 return entry;
2302}
2303
2304static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2305{
2306 struct ibmvnic_crq_queue *queue = &adapter->crq;
2307 union ibmvnic_crq *crq;
2308
2309 crq = &queue->msgs[queue->cur];
2310 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2311 if (++queue->cur == queue->size)
2312 queue->cur = 0;
2313 } else {
2314 crq = NULL;
2315 }
2316
2317 return crq;
2318}
2319
2320static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2321 union sub_crq *sub_crq)
2322{
2323 unsigned int ua = adapter->vdev->unit_address;
2324 struct device *dev = &adapter->vdev->dev;
2325 u64 *u64_crq = (u64 *)sub_crq;
2326 int rc;
2327
2328 netdev_dbg(adapter->netdev,
2329 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2330 (unsigned long int)cpu_to_be64(remote_handle),
2331 (unsigned long int)cpu_to_be64(u64_crq[0]),
2332 (unsigned long int)cpu_to_be64(u64_crq[1]),
2333 (unsigned long int)cpu_to_be64(u64_crq[2]),
2334 (unsigned long int)cpu_to_be64(u64_crq[3]));
2335
2336 /* Make sure the hypervisor sees the complete request */
2337 mb();
2338
2339 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2340 cpu_to_be64(remote_handle),
2341 cpu_to_be64(u64_crq[0]),
2342 cpu_to_be64(u64_crq[1]),
2343 cpu_to_be64(u64_crq[2]),
2344 cpu_to_be64(u64_crq[3]));
2345
2346 if (rc) {
2347 if (rc == H_CLOSED)
2348 dev_warn(dev, "CRQ Queue closed\n");
2349 dev_err(dev, "Send error (rc=%d)\n", rc);
2350 }
2351
2352 return rc;
2353}
2354
ad7775dc
TF		 2355static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2356 u64 remote_handle, u64 ioba, u64 num_entries)
2357{
2358 unsigned int ua = adapter->vdev->unit_address;
2359 struct device *dev = &adapter->vdev->dev;
2360 int rc;
2361
2362 /* Make sure the hypervisor sees the complete request */
2363 mb();
2364 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2365 cpu_to_be64(remote_handle),
2366 ioba, num_entries);
2367
2368 if (rc) {
2369 if (rc == H_CLOSED)
2370 dev_warn(dev, "CRQ Queue closed\n");
2371 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2372 }
2373
2374 return rc;
2375}
2376
032c5e82
TF		 2377static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2378 union ibmvnic_crq *crq)
2379{
2380 unsigned int ua = adapter->vdev->unit_address;
2381 struct device *dev = &adapter->vdev->dev;
2382 u64 *u64_crq = (u64 *)crq;
2383 int rc;
2384
2385 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2386 (unsigned long int)cpu_to_be64(u64_crq[0]),
2387 (unsigned long int)cpu_to_be64(u64_crq[1]));
2388
2389 /* Make sure the hypervisor sees the complete request */
2390 mb();
2391
2392 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2393 cpu_to_be64(u64_crq[0]),
2394 cpu_to_be64(u64_crq[1]));
2395
2396 if (rc) {
2397 if (rc == H_CLOSED)
2398 dev_warn(dev, "CRQ Queue closed\n");
2399 dev_warn(dev, "Send error (rc=%d)\n", rc);
2400 }
2401
2402 return rc;
2403}
2404
2405static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2406{
2407 union ibmvnic_crq crq;
2408
2409 memset(&crq, 0, sizeof(crq));
2410 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2411 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2412 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2413
2414 return ibmvnic_send_crq(adapter, &crq);
2415}
2416
032c5e82
TF		 2417static int send_version_xchg(struct ibmvnic_adapter *adapter)
2418{
2419 union ibmvnic_crq crq;
2420
2421 memset(&crq, 0, sizeof(crq));
2422 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2423 crq.version_exchange.cmd = VERSION_EXCHANGE;
2424 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2425
2426 return ibmvnic_send_crq(adapter, &crq);
2427}
2428
2429static void send_login(struct ibmvnic_adapter *adapter)
2430{
2431 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2432 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2433 struct device *dev = &adapter->vdev->dev;
2434 dma_addr_t rsp_buffer_token;
2435 dma_addr_t buffer_token;
2436 size_t rsp_buffer_size;
2437 union ibmvnic_crq crq;
032c5e82
TF		 2438 size_t buffer_size;
2439 __be64 *tx_list_p;
2440 __be64 *rx_list_p;
2441 int i;
2442
2443 buffer_size =
2444 sizeof(struct ibmvnic_login_buffer) +
2445 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2446
2447 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2448 if (!login_buffer)
2449 goto buf_alloc_failed;
2450
2451 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2452 DMA_TO_DEVICE);
2453 if (dma_mapping_error(dev, buffer_token)) {
2454 dev_err(dev, "Couldn't map login buffer\n");
2455 goto buf_map_failed;
2456 }
2457
498cd8e4
JA		 2458 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2459 sizeof(u64) * adapter->req_tx_queues +
2460 sizeof(u64) * adapter->req_rx_queues +
2461 sizeof(u64) * adapter->req_rx_queues +
2462 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2463
2464 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2465 if (!login_rsp_buffer)
2466 goto buf_rsp_alloc_failed;
2467
2468 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2469 rsp_buffer_size, DMA_FROM_DEVICE);
2470 if (dma_mapping_error(dev, rsp_buffer_token)) {
2471 dev_err(dev, "Couldn't map login rsp buffer\n");
2472 goto buf_rsp_map_failed;
2473 }
661a2622 2474
032c5e82
TF		 2475 adapter->login_buf = login_buffer;
2476 adapter->login_buf_token = buffer_token;
2477 adapter->login_buf_sz = buffer_size;
2478 adapter->login_rsp_buf = login_rsp_buffer;
2479 adapter->login_rsp_buf_token = rsp_buffer_token;
2480 adapter->login_rsp_buf_sz = rsp_buffer_size;
2481
2482 login_buffer->len = cpu_to_be32(buffer_size);
2483 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2484 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2485 login_buffer->off_txcomp_subcrqs =
2486 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2487 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2488 login_buffer->off_rxcomp_subcrqs =
2489 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2490 sizeof(u64) * adapter->req_tx_queues);
2491 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2492 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2493
2494 tx_list_p = (__be64 *)((char *)login_buffer +
2495 sizeof(struct ibmvnic_login_buffer));
2496 rx_list_p = (__be64 *)((char *)login_buffer +
2497 sizeof(struct ibmvnic_login_buffer) +
2498 sizeof(u64) * adapter->req_tx_queues);
2499
2500 for (i = 0; i < adapter->req_tx_queues; i++) {
2501 if (adapter->tx_scrq[i]) {
2502 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2503 crq_num);
2504 }
2505 }
2506
2507 for (i = 0; i < adapter->req_rx_queues; i++) {
2508 if (adapter->rx_scrq[i]) {
2509 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2510 crq_num);
2511 }
2512 }
2513
2514 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2515 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2516 netdev_dbg(adapter->netdev, "%016lx\n",
2517 ((unsigned long int *)(adapter->login_buf))[i]);
2518 }
2519
2520 memset(&crq, 0, sizeof(crq));
2521 crq.login.first = IBMVNIC_CRQ_CMD;
2522 crq.login.cmd = LOGIN;
2523 crq.login.ioba = cpu_to_be32(buffer_token);
2524 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2525 ibmvnic_send_crq(adapter, &crq);
2526
2527 return;
2528
032c5e82
TF		 2529buf_rsp_map_failed:
2530 kfree(login_rsp_buffer);
2531buf_rsp_alloc_failed:
2532 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2533buf_map_failed:
2534 kfree(login_buffer);
2535buf_alloc_failed:
2536 return;
2537}
2538
2539static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2540 u32 len, u8 map_id)
2541{
2542 union ibmvnic_crq crq;
2543
2544 memset(&crq, 0, sizeof(crq));
2545 crq.request_map.first = IBMVNIC_CRQ_CMD;
2546 crq.request_map.cmd = REQUEST_MAP;
2547 crq.request_map.map_id = map_id;
2548 crq.request_map.ioba = cpu_to_be32(addr);
2549 crq.request_map.len = cpu_to_be32(len);
2550 ibmvnic_send_crq(adapter, &crq);
2551}
2552
2553static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2554{
2555 union ibmvnic_crq crq;
2556
2557 memset(&crq, 0, sizeof(crq));
2558 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2559 crq.request_unmap.cmd = REQUEST_UNMAP;
2560 crq.request_unmap.map_id = map_id;
2561 ibmvnic_send_crq(adapter, &crq);
2562}
2563
2564static void send_map_query(struct ibmvnic_adapter *adapter)
2565{
2566 union ibmvnic_crq crq;
2567
2568 memset(&crq, 0, sizeof(crq));
2569 crq.query_map.first = IBMVNIC_CRQ_CMD;
2570 crq.query_map.cmd = QUERY_MAP;
2571 ibmvnic_send_crq(adapter, &crq);
2572}
2573
2574/* Send a series of CRQs requesting various capabilities of the VNIC server */
2575static void send_cap_queries(struct ibmvnic_adapter *adapter)
2576{
2577 union ibmvnic_crq crq;
2578
901e040a 2579 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2580 memset(&crq, 0, sizeof(crq));
2581 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2582 crq.query_capability.cmd = QUERY_CAPABILITY;
2583
2584 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2585 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2586 ibmvnic_send_crq(adapter, &crq);
2587
2588 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2589 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2590 ibmvnic_send_crq(adapter, &crq);
2591
2592 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2593 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2594 ibmvnic_send_crq(adapter, &crq);
2595
2596 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2597 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2598 ibmvnic_send_crq(adapter, &crq);
2599
2600 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2601 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2602 ibmvnic_send_crq(adapter, &crq);
2603
2604 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2605 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2606 ibmvnic_send_crq(adapter, &crq);
2607
2608 crq.query_capability.capability =
2609 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2610 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2611 ibmvnic_send_crq(adapter, &crq);
2612
2613 crq.query_capability.capability =
2614 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2615 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2616 ibmvnic_send_crq(adapter, &crq);
2617
2618 crq.query_capability.capability =
2619 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2620 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2621 ibmvnic_send_crq(adapter, &crq);
2622
2623 crq.query_capability.capability =
2624 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2625 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2626 ibmvnic_send_crq(adapter, &crq);
2627
2628 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2629 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2630 ibmvnic_send_crq(adapter, &crq);
2631
2632 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2633 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2634 ibmvnic_send_crq(adapter, &crq);
2635
2636 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2637 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2638 ibmvnic_send_crq(adapter, &crq);
2639
2640 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2641 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2642 ibmvnic_send_crq(adapter, &crq);
2643
2644 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2645 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2646 ibmvnic_send_crq(adapter, &crq);
2647
2648 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2649 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2650 ibmvnic_send_crq(adapter, &crq);
2651
6052d5e2
MFV		 2652 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2653 atomic_inc(&adapter->running_cap_crqs);
2654 ibmvnic_send_crq(adapter, &crq);
2655
032c5e82 2656 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2657 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2658 ibmvnic_send_crq(adapter, &crq);
2659
2660 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2661 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2662 ibmvnic_send_crq(adapter, &crq);
2663
2664 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2665 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2666 ibmvnic_send_crq(adapter, &crq);
2667
2668 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2669 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2670 ibmvnic_send_crq(adapter, &crq);
2671
2672 crq.query_capability.capability =
2673 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2674 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2675 ibmvnic_send_crq(adapter, &crq);
2676
2677 crq.query_capability.capability =
2678 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2679 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2680 ibmvnic_send_crq(adapter, &crq);
2681
2682 crq.query_capability.capability =
2683 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2684 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2685 ibmvnic_send_crq(adapter, &crq);
2686
2687 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2688 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2689 ibmvnic_send_crq(adapter, &crq);
2690}
2691
2692static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2693{
2694 struct device *dev = &adapter->vdev->dev;
2695 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2696 union ibmvnic_crq crq;
2697 int i;
2698
2699 dma_unmap_single(dev, adapter->ip_offload_tok,
2700 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2701
2702 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2703 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2704 netdev_dbg(adapter->netdev, "%016lx\n",
2705 ((unsigned long int *)(buf))[i]);
2706
2707 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2708 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2709 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2710 buf->tcp_ipv4_chksum);
2711 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2712 buf->tcp_ipv6_chksum);
2713 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2714 buf->udp_ipv4_chksum);
2715 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2716 buf->udp_ipv6_chksum);
2717 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2718 buf->large_tx_ipv4);
2719 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2720 buf->large_tx_ipv6);
2721 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2722 buf->large_rx_ipv4);
2723 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2724 buf->large_rx_ipv6);
2725 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2726 buf->max_ipv4_header_size);
2727 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2728 buf->max_ipv6_header_size);
2729 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2730 buf->max_tcp_header_size);
2731 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2732 buf->max_udp_header_size);
2733 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2734 buf->max_large_tx_size);
2735 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2736 buf->max_large_rx_size);
2737 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2738 buf->ipv6_extension_header);
2739 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2740 buf->tcp_pseudosum_req);
2741 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2742 buf->num_ipv6_ext_headers);
2743 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2744 buf->off_ipv6_ext_headers);
2745
2746 adapter->ip_offload_ctrl_tok =
2747 dma_map_single(dev, &adapter->ip_offload_ctrl,
2748 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2749
2750 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2751 dev_err(dev, "Couldn't map ip offload control buffer\n");
2752 return;
2753 }
2754
2755 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2756 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2757 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2758 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2759 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2760
2761 /* large_tx/rx disabled for now, additional features needed */
2762 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2763 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2764 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2765 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2766
2767 adapter->netdev->features = NETIF_F_GSO;
2768
2769 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2770 adapter->netdev->features |= NETIF_F_IP_CSUM;
2771
2772 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2773 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2774
9be02cdf
TF		 2775 if ((adapter->netdev->features &
2776 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2777 adapter->netdev->features |= NETIF_F_RXCSUM;
2778
032c5e82
TF		 2779 memset(&crq, 0, sizeof(crq));
2780 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2781 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2782 crq.control_ip_offload.len =
2783 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2784 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2785 ibmvnic_send_crq(adapter, &crq);
2786}
2787
2788static void handle_error_info_rsp(union ibmvnic_crq *crq,
2789 struct ibmvnic_adapter *adapter)
2790{
2791 struct device *dev = &adapter->vdev->dev;
96183182 2792 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2793 unsigned long flags;
2794 bool found = false;
2795 int i;
2796
2797 if (!crq->request_error_rsp.rc.code) {
2798 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2799 crq->request_error_rsp.rc.code);
2800 return;
2801 }
2802
2803 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2804 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2805 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2806 found = true;
2807 list_del(&error_buff->list);
2808 break;
2809 }
2810 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2811
2812 if (!found) {
2813 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2814 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2815 return;
2816 }
2817
2818 dev_err(dev, "Detailed info for error id %x:",
75224c93 2819 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2820
2821 for (i = 0; i < error_buff->len; i++) {
2822 pr_cont("%02x", (int)error_buff->buff[i]);
2823 if (i % 8 == 7)
2824 pr_cont(" ");
2825 }
2826 pr_cont("\n");
2827
2828 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2829 DMA_FROM_DEVICE);
2830 kfree(error_buff->buff);
2831 kfree(error_buff);
2832}
2833
2f9de9ba
NF		 2834static void request_error_information(struct ibmvnic_adapter *adapter,
2835 union ibmvnic_crq *err_crq)
032c5e82 2836{
032c5e82 2837 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2838 struct net_device *netdev = adapter->netdev;
032c5e82 2839 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2840 unsigned long timeout = msecs_to_jiffies(30000);
2841 union ibmvnic_crq crq;
032c5e82 2842 unsigned long flags;
2f9de9ba 2843 int rc, detail_len;
032c5e82
TF		 2844
2845 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2846 if (!error_buff)
2847 return;
2848
2f9de9ba 2849 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2850 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2851 if (!error_buff->buff) {
2852 kfree(error_buff);
2853 return;
2854 }
2855
2856 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2857 DMA_FROM_DEVICE);
2858 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2859 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2860 kfree(error_buff->buff);
2861 kfree(error_buff);
2862 return;
2863 }
2864
032c5e82 2865 error_buff->len = detail_len;
2f9de9ba 2866 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2867
2868 spin_lock_irqsave(&adapter->error_list_lock, flags);
2869 list_add_tail(&error_buff->list, &adapter->errors);
2870 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2871
2f9de9ba
NF		 2872 memset(&crq, 0, sizeof(crq));
2873 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2874 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2875 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2876 crq.request_error_info.len = cpu_to_be32(detail_len);
2877 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2878
2879 rc = ibmvnic_send_crq(adapter, &crq);
2880 if (rc) {
2881 netdev_err(netdev, "failed to request error information\n");
2882 goto err_info_fail;
2883 }
2884
2885 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2886 netdev_err(netdev, "timeout waiting for error information\n");
2887 goto err_info_fail;
2888 }
2889
2890 return;
2891
2892err_info_fail:
2893 spin_lock_irqsave(&adapter->error_list_lock, flags);
2894 list_del(&error_buff->list);
2895 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2896
2897 kfree(error_buff->buff);
2898 kfree(error_buff);
2899}
2900
2901static void handle_error_indication(union ibmvnic_crq *crq,
2902 struct ibmvnic_adapter *adapter)
2903{
2904 struct device *dev = &adapter->vdev->dev;
2905
2906 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2907 crq->error_indication.flags
2908 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2909 be32_to_cpu(crq->error_indication.error_id),
2910 be16_to_cpu(crq->error_indication.error_cause));
2911
2912 if (be32_to_cpu(crq->error_indication.error_id))
2913 request_error_information(adapter, crq);
ed651a10
NF		 2914
2915 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2916 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 2917 else
2918 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 2919}
2920
2921static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2922 struct ibmvnic_adapter *adapter)
2923{
2924 struct net_device *netdev = adapter->netdev;
2925 struct device *dev = &adapter->vdev->dev;
2926 long rc;
2927
2928 rc = crq->change_mac_addr_rsp.rc.code;
2929 if (rc) {
2930 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2931 return;
2932 }
2933 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2934 ETH_ALEN);
2935}
2936
2937static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2938 struct ibmvnic_adapter *adapter)
2939{
2940 struct device *dev = &adapter->vdev->dev;
2941 u64 *req_value;
2942 char *name;
2943
901e040a 2944 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2945 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2946 case REQ_TX_QUEUES:
2947 req_value = &adapter->req_tx_queues;
2948 name = "tx";
2949 break;
2950 case REQ_RX_QUEUES:
2951 req_value = &adapter->req_rx_queues;
2952 name = "rx";
2953 break;
2954 case REQ_RX_ADD_QUEUES:
2955 req_value = &adapter->req_rx_add_queues;
2956 name = "rx_add";
2957 break;
2958 case REQ_TX_ENTRIES_PER_SUBCRQ:
2959 req_value = &adapter->req_tx_entries_per_subcrq;
2960 name = "tx_entries_per_subcrq";
2961 break;
2962 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2963 req_value = &adapter->req_rx_add_entries_per_subcrq;
2964 name = "rx_add_entries_per_subcrq";
2965 break;
2966 case REQ_MTU:
2967 req_value = &adapter->req_mtu;
2968 name = "mtu";
2969 break;
2970 case PROMISC_REQUESTED:
2971 req_value = &adapter->promisc;
2972 name = "promisc";
2973 break;
2974 default:
2975 dev_err(dev, "Got invalid cap request rsp %d\n",
2976 crq->request_capability.capability);
2977 return;
2978 }
2979
2980 switch (crq->request_capability_rsp.rc.code) {
2981 case SUCCESS:
2982 break;
2983 case PARTIALSUCCESS:
2984 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2985 *req_value,
28f4d165 2986 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2987 number), name);
b510888f 2988 release_sub_crqs(adapter);
28f4d165 2989 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 2990 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 2991 return;
2992 default:
2993 dev_err(dev, "Error %d in request cap rsp\n",
2994 crq->request_capability_rsp.rc.code);
2995 return;
2996 }
2997
2998 /* Done receiving requested capabilities, query IP offload support */
901e040a 2999 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 3000 union ibmvnic_crq newcrq;
3001 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3002 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3003 &adapter->ip_offload_buf;
3004
249168ad 3005 adapter->wait_capability = false;
032c5e82
TF		 3006 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3007 buf_sz,
3008 DMA_FROM_DEVICE);
3009
3010 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3011 if (!firmware_has_feature(FW_FEATURE_CMO))
3012 dev_err(dev, "Couldn't map offload buffer\n");
3013 return;
3014 }
3015
3016 memset(&newcrq, 0, sizeof(newcrq));
3017 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3018 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3019 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3020 newcrq.query_ip_offload.ioba =
3021 cpu_to_be32(adapter->ip_offload_tok);
3022
3023 ibmvnic_send_crq(adapter, &newcrq);
3024 }
3025}
3026
3027static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3028 struct ibmvnic_adapter *adapter)
3029{
3030 struct device *dev = &adapter->vdev->dev;
3031 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3032 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 3033 int i;
3034
3035 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3036 DMA_BIDIRECTIONAL);
3037 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3038 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3039
498cd8e4
JA		 3040 /* If the number of queues requested can't be allocated by the
3041 * server, the login response will return with code 1. We will need
3042 * to resend the login buffer with fewer queues requested.
3043 */
3044 if (login_rsp_crq->generic.rc.code) {
3045 adapter->renegotiate = true;
3046 complete(&adapter->init_done);
3047 return 0;
3048 }
3049
032c5e82
TF		 3050 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3051 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3052 netdev_dbg(adapter->netdev, "%016lx\n",
3053 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3054 }
3055
3056 /* Sanity checks */
3057 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3058 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3059 adapter->req_rx_add_queues !=
3060 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3061 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3062 ibmvnic_remove(adapter->vdev);
3063 return -EIO;
3064 }
3065 complete(&adapter->init_done);
3066
032c5e82
TF		 3067 return 0;
3068}
3069
3070static void handle_request_map_rsp(union ibmvnic_crq *crq,
3071 struct ibmvnic_adapter *adapter)
3072{
3073 struct device *dev = &adapter->vdev->dev;
3074 u8 map_id = crq->request_map_rsp.map_id;
3075 int tx_subcrqs;
3076 int rx_subcrqs;
3077 long rc;
3078 int i;
3079
3080 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
3081 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3082
3083 rc = crq->request_map_rsp.rc.code;
3084 if (rc) {
3085 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
3086 adapter->map_id--;
3087 /* need to find and zero tx/rx_pool map_id */
3088 for (i = 0; i < tx_subcrqs; i++) {
3089 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
3090 adapter->tx_pool[i].long_term_buff.map_id = 0;
3091 }
3092 for (i = 0; i < rx_subcrqs; i++) {
3093 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
3094 adapter->rx_pool[i].long_term_buff.map_id = 0;
3095 }
3096 }
3097 complete(&adapter->fw_done);
3098}
3099
3100static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3101 struct ibmvnic_adapter *adapter)
3102{
3103 struct device *dev = &adapter->vdev->dev;
3104 long rc;
3105
3106 rc = crq->request_unmap_rsp.rc.code;
3107 if (rc)
3108 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3109}
3110
3111static void handle_query_map_rsp(union ibmvnic_crq *crq,
3112 struct ibmvnic_adapter *adapter)
3113{
3114 struct net_device *netdev = adapter->netdev;
3115 struct device *dev = &adapter->vdev->dev;
3116 long rc;
3117
3118 rc = crq->query_map_rsp.rc.code;
3119 if (rc) {
3120 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3121 return;
3122 }
3123 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3124 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3125 crq->query_map_rsp.free_pages);
3126}
3127
3128static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3129 struct ibmvnic_adapter *adapter)
3130{
3131 struct net_device *netdev = adapter->netdev;
3132 struct device *dev = &adapter->vdev->dev;
3133 long rc;
3134
901e040a 3135 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3136 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3137 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3138 rc = crq->query_capability.rc.code;
3139 if (rc) {
3140 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3141 goto out;
3142 }
3143
3144 switch (be16_to_cpu(crq->query_capability.capability)) {
3145 case MIN_TX_QUEUES:
3146 adapter->min_tx_queues =
de89e854 3147 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3148 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3149 adapter->min_tx_queues);
3150 break;
3151 case MIN_RX_QUEUES:
3152 adapter->min_rx_queues =
de89e854 3153 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3154 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3155 adapter->min_rx_queues);
3156 break;
3157 case MIN_RX_ADD_QUEUES:
3158 adapter->min_rx_add_queues =
de89e854 3159 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3160 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3161 adapter->min_rx_add_queues);
3162 break;
3163 case MAX_TX_QUEUES:
3164 adapter->max_tx_queues =
de89e854 3165 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3166 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3167 adapter->max_tx_queues);
3168 break;
3169 case MAX_RX_QUEUES:
3170 adapter->max_rx_queues =
de89e854 3171 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3172 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3173 adapter->max_rx_queues);
3174 break;
3175 case MAX_RX_ADD_QUEUES:
3176 adapter->max_rx_add_queues =
de89e854 3177 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3178 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3179 adapter->max_rx_add_queues);
3180 break;
3181 case MIN_TX_ENTRIES_PER_SUBCRQ:
3182 adapter->min_tx_entries_per_subcrq =
de89e854 3183 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3184 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3185 adapter->min_tx_entries_per_subcrq);
3186 break;
3187 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3188 adapter->min_rx_add_entries_per_subcrq =
de89e854 3189 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3190 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3191 adapter->min_rx_add_entries_per_subcrq);
3192 break;
3193 case MAX_TX_ENTRIES_PER_SUBCRQ:
3194 adapter->max_tx_entries_per_subcrq =
de89e854 3195 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3196 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3197 adapter->max_tx_entries_per_subcrq);
3198 break;
3199 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3200 adapter->max_rx_add_entries_per_subcrq =
de89e854 3201 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3202 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3203 adapter->max_rx_add_entries_per_subcrq);
3204 break;
3205 case TCP_IP_OFFLOAD:
3206 adapter->tcp_ip_offload =
de89e854 3207 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3208 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3209 adapter->tcp_ip_offload);
3210 break;
3211 case PROMISC_SUPPORTED:
3212 adapter->promisc_supported =
de89e854 3213 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3214 netdev_dbg(netdev, "promisc_supported = %lld\n",
3215 adapter->promisc_supported);
3216 break;
3217 case MIN_MTU:
de89e854 3218 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3219 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3220 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3221 break;
3222 case MAX_MTU:
de89e854 3223 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3224 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3225 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3226 break;
3227 case MAX_MULTICAST_FILTERS:
3228 adapter->max_multicast_filters =
de89e854 3229 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3230 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3231 adapter->max_multicast_filters);
3232 break;
3233 case VLAN_HEADER_INSERTION:
3234 adapter->vlan_header_insertion =
de89e854 3235 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3236 if (adapter->vlan_header_insertion)
3237 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3238 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3239 adapter->vlan_header_insertion);
3240 break;
6052d5e2
MFV		 3241 case RX_VLAN_HEADER_INSERTION:
3242 adapter->rx_vlan_header_insertion =
3243 be64_to_cpu(crq->query_capability.number);
3244 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3245 adapter->rx_vlan_header_insertion);
3246 break;
032c5e82
TF		 3247 case MAX_TX_SG_ENTRIES:
3248 adapter->max_tx_sg_entries =
de89e854 3249 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3250 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3251 adapter->max_tx_sg_entries);
3252 break;
3253 case RX_SG_SUPPORTED:
3254 adapter->rx_sg_supported =
de89e854 3255 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3256 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3257 adapter->rx_sg_supported);
3258 break;
3259 case OPT_TX_COMP_SUB_QUEUES:
3260 adapter->opt_tx_comp_sub_queues =
de89e854 3261 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3262 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3263 adapter->opt_tx_comp_sub_queues);
3264 break;
3265 case OPT_RX_COMP_QUEUES:
3266 adapter->opt_rx_comp_queues =
de89e854 3267 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3268 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3269 adapter->opt_rx_comp_queues);
3270 break;
3271 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3272 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3273 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3274 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3275 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3276 break;
3277 case OPT_TX_ENTRIES_PER_SUBCRQ:
3278 adapter->opt_tx_entries_per_subcrq =
de89e854 3279 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3280 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3281 adapter->opt_tx_entries_per_subcrq);
3282 break;
3283 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3284 adapter->opt_rxba_entries_per_subcrq =
de89e854 3285 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3286 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3287 adapter->opt_rxba_entries_per_subcrq);
3288 break;
3289 case TX_RX_DESC_REQ:
3290 adapter->tx_rx_desc_req = crq->query_capability.number;
3291 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3292 adapter->tx_rx_desc_req);
3293 break;
3294
3295 default:
3296 netdev_err(netdev, "Got invalid cap rsp %d\n",
3297 crq->query_capability.capability);
3298 }
3299
3300out:
249168ad
TF		 3301 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3302 adapter->wait_capability = false;
d346b9bc 3303 ibmvnic_send_req_caps(adapter, 0);
249168ad 3304 }
032c5e82
TF		 3305}
3306
032c5e82
TF		 3307static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3308 struct ibmvnic_adapter *adapter)
3309{
3310 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3311 struct net_device *netdev = adapter->netdev;
3312 struct device *dev = &adapter->vdev->dev;
993a82b0 3313 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3314 long rc;
3315
3316 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3317 (unsigned long int)cpu_to_be64(u64_crq[0]),
3318 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3319 switch (gen_crq->first) {
3320 case IBMVNIC_CRQ_INIT_RSP:
3321 switch (gen_crq->cmd) {
3322 case IBMVNIC_CRQ_INIT:
3323 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3324 adapter->from_passive_init = true;
3325 complete(&adapter->init_done);
032c5e82
TF		 3326 break;
3327 case IBMVNIC_CRQ_INIT_COMPLETE:
3328 dev_info(dev, "Partner initialization complete\n");
3329 send_version_xchg(adapter);
3330 break;
3331 default:
3332 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3333 }
3334 return;
3335 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3336 netif_carrier_off(netdev);
032c5e82 3337 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3338 dev_info(dev, "Migrated, re-enabling adapter\n");
3339 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3340 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3341 dev_info(dev, "Backing device failover detected\n");
ed651a10 3342 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3343 } else {
3344 /* The adapter lost the connection */
3345 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3346 gen_crq->cmd);
ed651a10 3347 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3348 }
3349 return;
3350 case IBMVNIC_CRQ_CMD_RSP:
3351 break;
3352 default:
3353 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3354 gen_crq->first);
3355 return;
3356 }
3357
3358 switch (gen_crq->cmd) {
3359 case VERSION_EXCHANGE_RSP:
3360 rc = crq->version_exchange_rsp.rc.code;
3361 if (rc) {
3362 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3363 break;
3364 }
3365 dev_info(dev, "Partner protocol version is %d\n",
3366 crq->version_exchange_rsp.version);
3367 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3368 ibmvnic_version)
3369 ibmvnic_version =
3370 be16_to_cpu(crq->version_exchange_rsp.version);
3371 send_cap_queries(adapter);
3372 break;
3373 case QUERY_CAPABILITY_RSP:
3374 handle_query_cap_rsp(crq, adapter);
3375 break;
3376 case QUERY_MAP_RSP:
3377 handle_query_map_rsp(crq, adapter);
3378 break;
3379 case REQUEST_MAP_RSP:
3380 handle_request_map_rsp(crq, adapter);
3381 break;
3382 case REQUEST_UNMAP_RSP:
3383 handle_request_unmap_rsp(crq, adapter);
3384 break;
3385 case REQUEST_CAPABILITY_RSP:
3386 handle_request_cap_rsp(crq, adapter);
3387 break;
3388 case LOGIN_RSP:
3389 netdev_dbg(netdev, "Got Login Response\n");
3390 handle_login_rsp(crq, adapter);
3391 break;
3392 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3393 netdev_dbg(netdev,
3394 "Got Logical Link State Response, state: %d rc: %d\n",
3395 crq->logical_link_state_rsp.link_state,
3396 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3397 adapter->logical_link_state =
3398 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3399 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3400 complete(&adapter->init_done);
032c5e82
TF		 3401 break;
3402 case LINK_STATE_INDICATION:
3403 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3404 adapter->phys_link_state =
3405 crq->link_state_indication.phys_link_state;
3406 adapter->logical_link_state =
3407 crq->link_state_indication.logical_link_state;
3408 break;
3409 case CHANGE_MAC_ADDR_RSP:
3410 netdev_dbg(netdev, "Got MAC address change Response\n");
3411 handle_change_mac_rsp(crq, adapter);
3412 break;
3413 case ERROR_INDICATION:
3414 netdev_dbg(netdev, "Got Error Indication\n");
3415 handle_error_indication(crq, adapter);
3416 break;
3417 case REQUEST_ERROR_RSP:
3418 netdev_dbg(netdev, "Got Error Detail Response\n");
3419 handle_error_info_rsp(crq, adapter);
3420 break;
3421 case REQUEST_STATISTICS_RSP:
3422 netdev_dbg(netdev, "Got Statistics Response\n");
3423 complete(&adapter->stats_done);
3424 break;
032c5e82
TF		 3425 case QUERY_IP_OFFLOAD_RSP:
3426 netdev_dbg(netdev, "Got Query IP offload Response\n");
3427 handle_query_ip_offload_rsp(adapter);
3428 break;
3429 case MULTICAST_CTRL_RSP:
3430 netdev_dbg(netdev, "Got multicast control Response\n");
3431 break;
3432 case CONTROL_IP_OFFLOAD_RSP:
3433 netdev_dbg(netdev, "Got Control IP offload Response\n");
3434 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3435 sizeof(adapter->ip_offload_ctrl),
3436 DMA_TO_DEVICE);
bd0b6723 3437 complete(&adapter->init_done);
032c5e82 3438 break;
032c5e82
TF		 3439 case COLLECT_FW_TRACE_RSP:
3440 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3441 complete(&adapter->fw_done);
3442 break;
3443 default:
3444 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3445 gen_crq->cmd);
3446 }
3447}
3448
3449static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3450{
3451 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3452
6c267b3d 3453 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3454 return IRQ_HANDLED;
3455}
3456
3457static void ibmvnic_tasklet(void *data)
3458{
3459 struct ibmvnic_adapter *adapter = data;
032c5e82 3460 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3461 union ibmvnic_crq *crq;
3462 unsigned long flags;
3463 bool done = false;
3464
3465 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3466 while (!done) {
3467 /* Pull all the valid messages off the CRQ */
3468 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3469 ibmvnic_handle_crq(crq, adapter);
3470 crq->generic.first = 0;
3471 }
ed7ecbf7
BK		 3472
3473 /* remain in tasklet until all
3474 * capabilities responses are received
3475 */
3476 if (!adapter->wait_capability)
3477 done = true;
032c5e82 3478 }
249168ad
TF		 3479 /* if capabilities CRQ's were sent in this tasklet, the following
3480 * tasklet must wait until all responses are received
3481 */
3482 if (atomic_read(&adapter->running_cap_crqs) != 0)
3483 adapter->wait_capability = true;
032c5e82 3484 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3485}
3486
3487static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3488{
3489 struct vio_dev *vdev = adapter->vdev;
3490 int rc;
3491
3492 do {
3493 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3494 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3495
3496 if (rc)
3497 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3498
3499 return rc;
3500}
3501
3502static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3503{
3504 struct ibmvnic_crq_queue *crq = &adapter->crq;
3505 struct device *dev = &adapter->vdev->dev;
3506 struct vio_dev *vdev = adapter->vdev;
3507 int rc;
3508
3509 /* Close the CRQ */
3510 do {
3511 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3512 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3513
3514 /* Clean out the queue */
3515 memset(crq->msgs, 0, PAGE_SIZE);
3516 crq->cur = 0;
3517
3518 /* And re-open it again */
3519 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3520 crq->msg_token, PAGE_SIZE);
3521
3522 if (rc == H_CLOSED)
3523 /* Adapter is good, but other end is not ready */
3524 dev_warn(dev, "Partner adapter not ready\n");
3525 else if (rc != 0)
3526 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3527
3528 return rc;
3529}
3530
f992887c 3531static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3532{
3533 struct ibmvnic_crq_queue *crq = &adapter->crq;
3534 struct vio_dev *vdev = adapter->vdev;
3535 long rc;
3536
f992887c
NF		 3537 if (!crq->msgs)
3538 return;
3539
032c5e82
TF		 3540 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3541 free_irq(vdev->irq, adapter);
6c267b3d 3542 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3543 do {
3544 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3545 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3546
3547 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3548 DMA_BIDIRECTIONAL);
3549 free_page((unsigned long)crq->msgs);
f992887c 3550 crq->msgs = NULL;
032c5e82
TF		 3551}
3552
f992887c 3553static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3554{
3555 struct ibmvnic_crq_queue *crq = &adapter->crq;
3556 struct device *dev = &adapter->vdev->dev;
3557 struct vio_dev *vdev = adapter->vdev;
3558 int rc, retrc = -ENOMEM;
3559
f992887c
NF		 3560 if (crq->msgs)
3561 return 0;
3562
032c5e82
TF		 3563 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3564 /* Should we allocate more than one page? */
3565
3566 if (!crq->msgs)
3567 return -ENOMEM;
3568
3569 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3570 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3571 DMA_BIDIRECTIONAL);
3572 if (dma_mapping_error(dev, crq->msg_token))
3573 goto map_failed;
3574
3575 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3576 crq->msg_token, PAGE_SIZE);
3577
3578 if (rc == H_RESOURCE)
3579 /* maybe kexecing and resource is busy. try a reset */
3580 rc = ibmvnic_reset_crq(adapter);
3581 retrc = rc;
3582
3583 if (rc == H_CLOSED) {
3584 dev_warn(dev, "Partner adapter not ready\n");
3585 } else if (rc) {
3586 dev_warn(dev, "Error %d opening adapter\n", rc);
3587 goto reg_crq_failed;
3588 }
3589
3590 retrc = 0;
3591
6c267b3d
TF		 3592 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3593 (unsigned long)adapter);
3594
032c5e82
TF		 3595 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3596 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3597 adapter);
3598 if (rc) {
3599 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3600 vdev->irq, rc);
3601 goto req_irq_failed;
3602 }
3603
3604 rc = vio_enable_interrupts(vdev);
3605 if (rc) {
3606 dev_err(dev, "Error %d enabling interrupts\n", rc);
3607 goto req_irq_failed;
3608 }
3609
3610 crq->cur = 0;
3611 spin_lock_init(&crq->lock);
3612
3613 return retrc;
3614
3615req_irq_failed:
6c267b3d 3616 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3617 do {
3618 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3619 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3620reg_crq_failed:
3621 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3622map_failed:
3623 free_page((unsigned long)crq->msgs);
f992887c 3624 crq->msgs = NULL;
032c5e82
TF		 3625 return retrc;
3626}
3627
f6ef6408 3628static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3629{
f6ef6408 3630 struct device *dev = &adapter->vdev->dev;
ea22d51a 3631 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3632 int rc;
3633
28cde751
NF		 3634 if (adapter->resetting) {
3635 rc = ibmvnic_reset_crq(adapter);
3636 if (!rc)
3637 rc = vio_enable_interrupts(adapter->vdev);
3638 } else {
3639 rc = init_crq_queue(adapter);
3640 }
3641
f6ef6408
JA		 3642 if (rc) {
3643 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3644 return rc;
3645 }
3646
017892c1
JA		 3647 adapter->from_passive_init = false;
3648
f6ef6408
JA		 3649 init_completion(&adapter->init_done);
3650 ibmvnic_send_crq_init(adapter);
3651 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3652 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 3653 return -1;
3654 }
3655
3656 if (adapter->from_passive_init) {
3657 adapter->state = VNIC_OPEN;
3658 adapter->from_passive_init = false;
f6ef6408
JA		 3659 return -1;
3660 }
3661
57a49436
NF		 3662 if (adapter->resetting)
3663 rc = reset_sub_crq_queues(adapter);
3664 else
3665 rc = init_sub_crqs(adapter);
1bb3c739
NF		 3666 if (rc) {
3667 dev_err(dev, "Initialization of sub crqs failed\n");
3668 release_crq_queue(adapter);
3669 }
3670
3671 return rc;
f6ef6408
JA		 3672}
3673
40c9db8a
TF		 3674static struct device_attribute dev_attr_failover;
3675
f6ef6408
JA		 3676static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3677{
032c5e82
TF		 3678 struct ibmvnic_adapter *adapter;
3679 struct net_device *netdev;
3680 unsigned char *mac_addr_p;
032c5e82
TF		 3681 int rc;
3682
3683 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3684 dev->unit_address);
3685
3686 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3687 VETH_MAC_ADDR, NULL);
3688 if (!mac_addr_p) {
3689 dev_err(&dev->dev,
3690 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3691 __FILE__, __LINE__);
3692 return 0;
3693 }
3694
3695 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3696 IBMVNIC_MAX_TX_QUEUES);
3697 if (!netdev)
3698 return -ENOMEM;
3699
3700 adapter = netdev_priv(netdev);
90c8014c 3701 adapter->state = VNIC_PROBING;
032c5e82
TF		 3702 dev_set_drvdata(&dev->dev, netdev);
3703 adapter->vdev = dev;
3704 adapter->netdev = netdev;
3705
3706 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3707 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3708 netdev->irq = dev->irq;
3709 netdev->netdev_ops = &ibmvnic_netdev_ops;
3710 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3711 SET_NETDEV_DEV(netdev, &dev->dev);
3712
3713 spin_lock_init(&adapter->stats_lock);
3714
032c5e82 3715 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3716 spin_lock_init(&adapter->error_list_lock);
032c5e82 3717
ed651a10
NF		 3718 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3719 INIT_LIST_HEAD(&adapter->rwi_list);
3720 mutex_init(&adapter->reset_lock);
3721 mutex_init(&adapter->rwi_lock);
3722 adapter->resetting = false;
3723
f6ef6408
JA		 3724 rc = ibmvnic_init(adapter);
3725 if (rc) {
3726 free_netdev(netdev);
3727 return rc;
032c5e82 3728 }
032c5e82 3729
f39f0d1e 3730 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82 3731
40c9db8a
TF		 3732 rc = device_create_file(&dev->dev, &dev_attr_failover);
3733 if (rc) {
3734 free_netdev(netdev);
3735 return rc;
3736 }
3737
032c5e82
TF		 3738 rc = register_netdev(netdev);
3739 if (rc) {
3740 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
40c9db8a 3741 device_remove_file(&dev->dev, &dev_attr_failover);
f6ef6408
JA		 3742 free_netdev(netdev);
3743 return rc;
032c5e82
TF		 3744 }
3745 dev_info(&dev->dev, "ibmvnic registered\n");
3746
90c8014c 3747 adapter->state = VNIC_PROBED;
032c5e82 3748 return 0;
032c5e82
TF		 3749}
3750
3751static int ibmvnic_remove(struct vio_dev *dev)
3752{
3753 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3754 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3755
90c8014c 3756 adapter->state = VNIC_REMOVING;
032c5e82 3757 unregister_netdev(netdev);
ed651a10 3758 mutex_lock(&adapter->reset_lock);
37489055
NF		 3759
3760 release_resources(adapter);
3761 release_sub_crqs(adapter);
3762 release_crq_queue(adapter);
3763
90c8014c
NF		 3764 adapter->state = VNIC_REMOVED;
3765
ed651a10 3766 mutex_unlock(&adapter->reset_lock);
40c9db8a 3767 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 3768 free_netdev(netdev);
3769 dev_set_drvdata(&dev->dev, NULL);
3770
3771 return 0;
3772}
3773
40c9db8a
TF		 3774static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3775 const char *buf, size_t count)
3776{
3777 struct net_device *netdev = dev_get_drvdata(dev);
3778 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3779 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3780 __be64 session_token;
3781 long rc;
3782
3783 if (!sysfs_streq(buf, "1"))
3784 return -EINVAL;
3785
3786 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
3787 H_GET_SESSION_TOKEN, 0, 0, 0);
3788 if (rc) {
3789 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
3790 rc);
3791 return -EINVAL;
3792 }
3793
3794 session_token = (__be64)retbuf[0];
3795 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
3796 be64_to_cpu(session_token));
3797 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3798 H_SESSION_ERR_DETECTED, session_token, 0, 0);
3799 if (rc) {
3800 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
3801 rc);
3802 return -EINVAL;
3803 }
3804
3805 return count;
3806}
3807
3808static DEVICE_ATTR(failover, 0200, NULL, failover_store);
3809
032c5e82
TF		 3810static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3811{
3812 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3813 struct ibmvnic_adapter *adapter;
3814 struct iommu_table *tbl;
3815 unsigned long ret = 0;
3816 int i;
3817
3818 tbl = get_iommu_table_base(&vdev->dev);
3819
3820 /* netdev inits at probe time along with the structures we need below*/
3821 if (!netdev)
3822 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3823
3824 adapter = netdev_priv(netdev);
3825
3826 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3827 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3828
3829 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3830 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3831
3832 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3833 i++)
3834 ret += adapter->rx_pool[i].size *
3835 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3836
3837 return ret;
3838}
3839
3840static int ibmvnic_resume(struct device *dev)
3841{
3842 struct net_device *netdev = dev_get_drvdata(dev);
3843 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3844 int i;
3845
3846 /* kick the interrupt handlers just in case we lost an interrupt */
3847 for (i = 0; i < adapter->req_rx_queues; i++)
3848 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3849 adapter->rx_scrq[i]);
3850
3851 return 0;
3852}
3853
3854static struct vio_device_id ibmvnic_device_table[] = {
3855 {"network", "IBM,vnic"},
3856 {"", "" }
3857};
3858MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3859
3860static const struct dev_pm_ops ibmvnic_pm_ops = {
3861 .resume = ibmvnic_resume
3862};
3863
3864static struct vio_driver ibmvnic_driver = {
3865 .id_table = ibmvnic_device_table,
3866 .probe = ibmvnic_probe,
3867 .remove = ibmvnic_remove,
3868 .get_desired_dma = ibmvnic_get_desired_dma,
3869 .name = ibmvnic_driver_name,
3870 .pm = &ibmvnic_pm_ops,
3871};
3872
3873/* module functions */
3874static int __init ibmvnic_module_init(void)
3875{
3876 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3877 IBMVNIC_DRIVER_VERSION);
3878
3879 return vio_register_driver(&ibmvnic_driver);
3880}
3881
3882static void __exit ibmvnic_module_exit(void)
3883{
3884 vio_unregister_driver(&ibmvnic_driver);
3885}
3886
3887module_init(ibmvnic_module_init);
3888module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)