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ibmvnic: Track state of adapter napis
[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
84MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
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
032c5e82
TF		 166static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
167 struct ibmvnic_long_term_buff *ltb, int size)
168{
169 struct device *dev = &adapter->vdev->dev;
170
171 ltb->size = size;
172 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
173 GFP_KERNEL);
174
175 if (!ltb->buff) {
176 dev_err(dev, "Couldn't alloc long term buffer\n");
177 return -ENOMEM;
178 }
179 ltb->map_id = adapter->map_id;
180 adapter->map_id++;
db5d0b59
NF		 181
182 init_completion(&adapter->fw_done);
032c5e82
TF		 183 send_request_map(adapter, ltb->addr,
184 ltb->size, ltb->map_id);
032c5e82
TF		 185 wait_for_completion(&adapter->fw_done);
186 return 0;
187}
188
189static void free_long_term_buff(struct ibmvnic_adapter *adapter,
190 struct ibmvnic_long_term_buff *ltb)
191{
192 struct device *dev = &adapter->vdev->dev;
193
c657e32c
NF		 194 if (!ltb->buff)
195 return;
196
ed651a10
NF		 197 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
198 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 199 send_request_unmap(adapter, ltb->map_id);
59af56c2 200 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 201}
202
032c5e82
TF		 203static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
204 struct ibmvnic_rx_pool *pool)
205{
206 int count = pool->size - atomic_read(&pool->available);
207 struct device *dev = &adapter->vdev->dev;
208 int buffers_added = 0;
209 unsigned long lpar_rc;
210 union sub_crq sub_crq;
211 struct sk_buff *skb;
212 unsigned int offset;
213 dma_addr_t dma_addr;
214 unsigned char *dst;
215 u64 *handle_array;
216 int shift = 0;
217 int index;
218 int i;
219
220 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
221 be32_to_cpu(adapter->login_rsp_buf->
222 off_rxadd_subcrqs));
223
224 for (i = 0; i < count; ++i) {
225 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
226 if (!skb) {
227 dev_err(dev, "Couldn't replenish rx buff\n");
228 adapter->replenish_no_mem++;
229 break;
230 }
231
232 index = pool->free_map[pool->next_free];
233
234 if (pool->rx_buff[index].skb)
235 dev_err(dev, "Inconsistent free_map!\n");
236
237 /* Copy the skb to the long term mapped DMA buffer */
238 offset = index * pool->buff_size;
239 dst = pool->long_term_buff.buff + offset;
240 memset(dst, 0, pool->buff_size);
241 dma_addr = pool->long_term_buff.addr + offset;
242 pool->rx_buff[index].data = dst;
243
244 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
245 pool->rx_buff[index].dma = dma_addr;
246 pool->rx_buff[index].skb = skb;
247 pool->rx_buff[index].pool_index = pool->index;
248 pool->rx_buff[index].size = pool->buff_size;
249
250 memset(&sub_crq, 0, sizeof(sub_crq));
251 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
252 sub_crq.rx_add.correlator =
253 cpu_to_be64((u64)&pool->rx_buff[index]);
254 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
255 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
256
257 /* The length field of the sCRQ is defined to be 24 bits so the
258 * buffer size needs to be left shifted by a byte before it is
259 * converted to big endian to prevent the last byte from being
260 * truncated.
261 */
262#ifdef __LITTLE_ENDIAN__
263 shift = 8;
264#endif
265 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
266
267 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
268 &sub_crq);
269 if (lpar_rc != H_SUCCESS)
270 goto failure;
271
272 buffers_added++;
273 adapter->replenish_add_buff_success++;
274 pool->next_free = (pool->next_free + 1) % pool->size;
275 }
276 atomic_add(buffers_added, &pool->available);
277 return;
278
279failure:
280 dev_info(dev, "replenish pools failure\n");
281 pool->free_map[pool->next_free] = index;
282 pool->rx_buff[index].skb = NULL;
283 if (!dma_mapping_error(dev, dma_addr))
284 dma_unmap_single(dev, dma_addr, pool->buff_size,
285 DMA_FROM_DEVICE);
286
287 dev_kfree_skb_any(skb);
288 adapter->replenish_add_buff_failure++;
289 atomic_add(buffers_added, &pool->available);
290}
291
292static void replenish_pools(struct ibmvnic_adapter *adapter)
293{
294 int i;
295
032c5e82
TF		 296 adapter->replenish_task_cycles++;
297 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
298 i++) {
299 if (adapter->rx_pool[i].active)
300 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
301 }
302}
303
7bbc27a4
NF		 304static void release_stats_token(struct ibmvnic_adapter *adapter)
305{
306 struct device *dev = &adapter->vdev->dev;
307
308 if (!adapter->stats_token)
309 return;
310
311 dma_unmap_single(dev, adapter->stats_token,
312 sizeof(struct ibmvnic_statistics),
313 DMA_FROM_DEVICE);
314 adapter->stats_token = 0;
315}
316
317static int init_stats_token(struct ibmvnic_adapter *adapter)
318{
319 struct device *dev = &adapter->vdev->dev;
320 dma_addr_t stok;
321
322 stok = dma_map_single(dev, &adapter->stats,
323 sizeof(struct ibmvnic_statistics),
324 DMA_FROM_DEVICE);
325 if (dma_mapping_error(dev, stok)) {
326 dev_err(dev, "Couldn't map stats buffer\n");
327 return -1;
328 }
329
330 adapter->stats_token = stok;
331 return 0;
332}
333
0ffe2cb7 334static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 335{
0ffe2cb7
NF		 336 struct ibmvnic_rx_pool *rx_pool;
337 int rx_scrqs;
338 int i, j;
032c5e82 339
0ffe2cb7 340 if (!adapter->rx_pool)
032c5e82
TF		 341 return;
342
0ffe2cb7
NF		 343 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
344 for (i = 0; i < rx_scrqs; i++) {
345 rx_pool = &adapter->rx_pool[i];
346
347 kfree(rx_pool->free_map);
348 free_long_term_buff(adapter, &rx_pool->long_term_buff);
349
350 if (!rx_pool->rx_buff)
e0ebe942 351 continue;
0ffe2cb7
NF		 352
353 for (j = 0; j < rx_pool->size; j++) {
354 if (rx_pool->rx_buff[j].skb) {
355 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
356 rx_pool->rx_buff[i].skb = NULL;
357 }
358 }
359
360 kfree(rx_pool->rx_buff);
361 }
362
363 kfree(adapter->rx_pool);
364 adapter->rx_pool = NULL;
365}
366
367static int init_rx_pools(struct net_device *netdev)
368{
369 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
370 struct device *dev = &adapter->vdev->dev;
371 struct ibmvnic_rx_pool *rx_pool;
372 int rxadd_subcrqs;
373 u64 *size_array;
374 int i, j;
375
376 rxadd_subcrqs =
377 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
378 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
379 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
380
381 adapter->rx_pool = kcalloc(rxadd_subcrqs,
382 sizeof(struct ibmvnic_rx_pool),
383 GFP_KERNEL);
384 if (!adapter->rx_pool) {
385 dev_err(dev, "Failed to allocate rx pools\n");
386 return -1;
387 }
388
389 for (i = 0; i < rxadd_subcrqs; i++) {
390 rx_pool = &adapter->rx_pool[i];
391
392 netdev_dbg(adapter->netdev,
393 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
394 i, adapter->req_rx_add_entries_per_subcrq,
395 be64_to_cpu(size_array[i]));
396
397 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
398 rx_pool->index = i;
399 rx_pool->buff_size = be64_to_cpu(size_array[i]);
400 rx_pool->active = 1;
401
402 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
403 GFP_KERNEL);
404 if (!rx_pool->free_map) {
405 release_rx_pools(adapter);
406 return -1;
032c5e82 407 }
0ffe2cb7
NF		 408
409 rx_pool->rx_buff = kcalloc(rx_pool->size,
410 sizeof(struct ibmvnic_rx_buff),
411 GFP_KERNEL);
412 if (!rx_pool->rx_buff) {
413 dev_err(dev, "Couldn't alloc rx buffers\n");
414 release_rx_pools(adapter);
415 return -1;
416 }
417
418 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
419 rx_pool->size * rx_pool->buff_size)) {
420 release_rx_pools(adapter);
421 return -1;
422 }
423
424 for (j = 0; j < rx_pool->size; ++j)
425 rx_pool->free_map[j] = j;
426
427 atomic_set(&rx_pool->available, 0);
428 rx_pool->next_alloc = 0;
429 rx_pool->next_free = 0;
032c5e82 430 }
0ffe2cb7
NF		 431
432 return 0;
032c5e82
TF		 433}
434
c657e32c
NF		 435static void release_tx_pools(struct ibmvnic_adapter *adapter)
436{
437 struct ibmvnic_tx_pool *tx_pool;
438 int i, tx_scrqs;
439
440 if (!adapter->tx_pool)
441 return;
442
443 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
444 for (i = 0; i < tx_scrqs; i++) {
445 tx_pool = &adapter->tx_pool[i];
446 kfree(tx_pool->tx_buff);
447 free_long_term_buff(adapter, &tx_pool->long_term_buff);
448 kfree(tx_pool->free_map);
449 }
450
451 kfree(adapter->tx_pool);
452 adapter->tx_pool = NULL;
453}
454
455static int init_tx_pools(struct net_device *netdev)
456{
457 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
458 struct device *dev = &adapter->vdev->dev;
459 struct ibmvnic_tx_pool *tx_pool;
460 int tx_subcrqs;
461 int i, j;
462
463 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
464 adapter->tx_pool = kcalloc(tx_subcrqs,
465 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
466 if (!adapter->tx_pool)
467 return -1;
468
469 for (i = 0; i < tx_subcrqs; i++) {
470 tx_pool = &adapter->tx_pool[i];
471 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
472 sizeof(struct ibmvnic_tx_buff),
473 GFP_KERNEL);
474 if (!tx_pool->tx_buff) {
475 dev_err(dev, "tx pool buffer allocation failed\n");
476 release_tx_pools(adapter);
477 return -1;
478 }
479
480 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
481 adapter->req_tx_entries_per_subcrq *
482 adapter->req_mtu)) {
483 release_tx_pools(adapter);
484 return -1;
485 }
486
487 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
488 sizeof(int), GFP_KERNEL);
489 if (!tx_pool->free_map) {
490 release_tx_pools(adapter);
491 return -1;
492 }
493
494 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
495 tx_pool->free_map[j] = j;
496
497 tx_pool->consumer_index = 0;
498 tx_pool->producer_index = 0;
499 }
500
501 return 0;
502}
503
661a2622
NF		 504static void release_error_buffers(struct ibmvnic_adapter *adapter)
505{
506 struct device *dev = &adapter->vdev->dev;
507 struct ibmvnic_error_buff *error_buff, *tmp;
508 unsigned long flags;
509
510 spin_lock_irqsave(&adapter->error_list_lock, flags);
511 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
512 list_del(&error_buff->list);
513 dma_unmap_single(dev, error_buff->dma, error_buff->len,
514 DMA_FROM_DEVICE);
515 kfree(error_buff->buff);
516 kfree(error_buff);
517 }
518 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
519}
520
d944c3d6
JA		 521static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
522{
523 int i;
524
525 if (adapter->napi_enabled)
526 return;
527
528 for (i = 0; i < adapter->req_rx_queues; i++)
529 napi_enable(&adapter->napi[i]);
530
531 adapter->napi_enabled = true;
532}
533
534static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
535{
536 int i;
537
538 if (!adapter->napi_enabled)
539 return;
540
541 for (i = 0; i < adapter->req_rx_queues; i++)
542 napi_disable(&adapter->napi[i]);
543
544 adapter->napi_enabled = false;
545}
546
a57a5d25 547static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 548{
549 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 550 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 551 struct device *dev = &adapter->vdev->dev;
032c5e82 552
bd0b6723
JA		 553 do {
554 if (adapter->renegotiate) {
555 adapter->renegotiate = false;
b510888f 556 release_sub_crqs(adapter);
bd0b6723
JA		 557
558 reinit_completion(&adapter->init_done);
559 send_cap_queries(adapter);
560 if (!wait_for_completion_timeout(&adapter->init_done,
561 timeout)) {
562 dev_err(dev, "Capabilities query timeout\n");
563 return -1;
564 }
565 }
566
567 reinit_completion(&adapter->init_done);
568 send_login(adapter);
569 if (!wait_for_completion_timeout(&adapter->init_done,
570 timeout)) {
571 dev_err(dev, "Login timeout\n");
572 return -1;
573 }
574 } while (adapter->renegotiate);
575
a57a5d25
JA		 576 return 0;
577}
578
1b8955ee
NF		 579static void release_resources(struct ibmvnic_adapter *adapter)
580{
c7bac00b
NF		 581 int i;
582
1b8955ee
NF		 583 release_tx_pools(adapter);
584 release_rx_pools(adapter);
585
1b8955ee 586 release_stats_token(adapter);
661a2622 587 release_error_buffers(adapter);
c7bac00b
NF		 588
589 if (adapter->napi) {
590 for (i = 0; i < adapter->req_rx_queues; i++) {
591 if (&adapter->napi[i])
592 netif_napi_del(&adapter->napi[i]);
593 }
594 }
1b8955ee
NF		 595}
596
53da09e9
NF		 597static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
598{
599 struct net_device *netdev = adapter->netdev;
600 unsigned long timeout = msecs_to_jiffies(30000);
601 union ibmvnic_crq crq;
602 bool resend;
603 int rc;
604
53da09e9
NF		 605 netdev_err(netdev, "setting link state %d\n", link_state);
606 memset(&crq, 0, sizeof(crq));
607 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
608 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
609 crq.logical_link_state.link_state = link_state;
610
611 do {
612 resend = false;
613
614 reinit_completion(&adapter->init_done);
615 rc = ibmvnic_send_crq(adapter, &crq);
616 if (rc) {
617 netdev_err(netdev, "Failed to set link state\n");
618 return rc;
619 }
620
621 if (!wait_for_completion_timeout(&adapter->init_done,
622 timeout)) {
623 netdev_err(netdev, "timeout setting link state\n");
624 return -1;
625 }
626
627 if (adapter->init_done_rc == 1) {
628 /* Partuial success, delay and re-send */
629 mdelay(1000);
630 resend = true;
631 }
632 } while (resend);
633
634 return 0;
635}
636
7f3c6e6b
TF		 637static int set_real_num_queues(struct net_device *netdev)
638{
639 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
640 int rc;
641
642 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
643 if (rc) {
644 netdev_err(netdev, "failed to set the number of tx queues\n");
645 return rc;
646 }
647
648 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
649 if (rc)
650 netdev_err(netdev, "failed to set the number of rx queues\n");
651
652 return rc;
653}
654
bfc32f29 655static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 656{
bfc32f29
NF		 657 struct net_device *netdev = adapter->netdev;
658 int i, rc;
a57a5d25 659
7f3c6e6b
TF		 660 rc = set_real_num_queues(netdev);
661 if (rc)
662 return rc;
bd0b6723
JA		 663
664 rc = init_sub_crq_irqs(adapter);
665 if (rc) {
bfc32f29 666 netdev_err(netdev, "failed to initialize sub crq irqs\n");
bd0b6723
JA		 667 return -1;
668 }
669
5d5e84eb
NF		 670 rc = init_stats_token(adapter);
671 if (rc)
672 return rc;
673
032c5e82
TF		 674 adapter->map_id = 1;
675 adapter->napi = kcalloc(adapter->req_rx_queues,
676 sizeof(struct napi_struct), GFP_KERNEL);
677 if (!adapter->napi)
bfc32f29
NF		 678 return -ENOMEM;
679
032c5e82
TF		 680 for (i = 0; i < adapter->req_rx_queues; i++) {
681 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
682 NAPI_POLL_WEIGHT);
032c5e82 683 }
032c5e82 684
032c5e82 685 send_map_query(adapter);
0ffe2cb7
NF		 686
687 rc = init_rx_pools(netdev);
688 if (rc)
bfc32f29 689 return rc;
032c5e82 690
c657e32c 691 rc = init_tx_pools(netdev);
bfc32f29
NF		 692 return rc;
693}
694
ed651a10 695static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 696{
697 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 698 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 699 int i, rc;
700
90c8014c 701 adapter->state = VNIC_OPENING;
032c5e82 702 replenish_pools(adapter);
d944c3d6 703 ibmvnic_napi_enable(adapter);
bfc32f29 704
032c5e82
TF		 705 /* We're ready to receive frames, enable the sub-crq interrupts and
706 * set the logical link state to up
707 */
ed651a10
NF		 708 for (i = 0; i < adapter->req_rx_queues; i++) {
709 if (prev_state == VNIC_CLOSED)
710 enable_irq(adapter->rx_scrq[i]->irq);
711 else
712 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
713 }
032c5e82 714
ed651a10
NF		 715 for (i = 0; i < adapter->req_tx_queues; i++) {
716 if (prev_state == VNIC_CLOSED)
717 enable_irq(adapter->tx_scrq[i]->irq);
718 else
719 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
720 }
032c5e82 721
53da09e9 722 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 723 if (rc) {
724 for (i = 0; i < adapter->req_rx_queues; i++)
725 napi_disable(&adapter->napi[i]);
726 release_resources(adapter);
ed651a10 727 return rc;
bfc32f29 728 }
032c5e82 729
ed651a10
NF		 730 netif_tx_start_all_queues(netdev);
731
732 if (prev_state == VNIC_CLOSED) {
733 for (i = 0; i < adapter->req_rx_queues; i++)
734 napi_schedule(&adapter->napi[i]);
735 }
736
737 adapter->state = VNIC_OPEN;
738 return rc;
739}
740
741static int ibmvnic_open(struct net_device *netdev)
742{
743 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
744 int rc;
745
746 mutex_lock(&adapter->reset_lock);
747
748 if (adapter->state != VNIC_CLOSED) {
749 rc = ibmvnic_login(netdev);
750 if (rc) {
751 mutex_unlock(&adapter->reset_lock);
752 return rc;
753 }
754
755 rc = init_resources(adapter);
756 if (rc) {
757 netdev_err(netdev, "failed to initialize resources\n");
758 release_resources(adapter);
759 mutex_unlock(&adapter->reset_lock);
760 return rc;
761 }
762 }
763
764 rc = __ibmvnic_open(netdev);
765 mutex_unlock(&adapter->reset_lock);
766
bfc32f29 767 return rc;
032c5e82
TF		 768}
769
b41b83e9
NF		 770static void clean_tx_pools(struct ibmvnic_adapter *adapter)
771{
772 struct ibmvnic_tx_pool *tx_pool;
773 u64 tx_entries;
774 int tx_scrqs;
775 int i, j;
776
777 if (!adapter->tx_pool)
778 return;
779
780 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
781 tx_entries = adapter->req_tx_entries_per_subcrq;
782
783 /* Free any remaining skbs in the tx buffer pools */
784 for (i = 0; i < tx_scrqs; i++) {
785 tx_pool = &adapter->tx_pool[i];
786 if (!tx_pool)
787 continue;
788
789 for (j = 0; j < tx_entries; j++) {
790 if (tx_pool->tx_buff[j].skb) {
791 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
792 tx_pool->tx_buff[j].skb = NULL;
793 }
794 }
795 }
796}
797
ed651a10 798static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 799{
800 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 801 int rc = 0;
ea5509f5
JA		 802 int i;
803
90c8014c 804 adapter->state = VNIC_CLOSING;
ed651a10 805 netif_tx_stop_all_queues(netdev);
d944c3d6 806 ibmvnic_napi_disable(adapter);
46293b94
NF		 807 clean_tx_pools(adapter);
808
809 if (adapter->tx_scrq) {
810 for (i = 0; i < adapter->req_tx_queues; i++)
811 if (adapter->tx_scrq[i]->irq)
812 disable_irq(adapter->tx_scrq[i]->irq);
813 }
814
53da09e9 815 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 816 if (rc)
817 return rc;
818
819 if (adapter->rx_scrq) {
820 for (i = 0; i < adapter->req_rx_queues; i++) {
821 int retries = 10;
822
823 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
824 retries--;
825 mdelay(100);
826
827 if (retries == 0)
828 break;
829 }
830
831 if (adapter->rx_scrq[i]->irq)
832 disable_irq(adapter->rx_scrq[i]->irq);
833 }
834 }
ea5509f5 835
90c8014c 836 adapter->state = VNIC_CLOSED;
53da09e9 837 return rc;
032c5e82
TF		 838}
839
ed651a10
NF		 840static int ibmvnic_close(struct net_device *netdev)
841{
842 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
843 int rc;
844
845 mutex_lock(&adapter->reset_lock);
846 rc = __ibmvnic_close(netdev);
847 mutex_unlock(&adapter->reset_lock);
848
849 return rc;
850}
851
ad7775dc
TF		 852/**
853 * build_hdr_data - creates L2/L3/L4 header data buffer
854 * @hdr_field - bitfield determining needed headers
855 * @skb - socket buffer
856 * @hdr_len - array of header lengths
857 * @tot_len - total length of data
858 *
859 * Reads hdr_field to determine which headers are needed by firmware.
860 * Builds a buffer containing these headers. Saves individual header
861 * lengths and total buffer length to be used to build descriptors.
862 */
863static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
864 int *hdr_len, u8 *hdr_data)
865{
866 int len = 0;
867 u8 *hdr;
868
869 hdr_len[0] = sizeof(struct ethhdr);
870
871 if (skb->protocol == htons(ETH_P_IP)) {
872 hdr_len[1] = ip_hdr(skb)->ihl * 4;
873 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
874 hdr_len[2] = tcp_hdrlen(skb);
875 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
876 hdr_len[2] = sizeof(struct udphdr);
877 } else if (skb->protocol == htons(ETH_P_IPV6)) {
878 hdr_len[1] = sizeof(struct ipv6hdr);
879 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
880 hdr_len[2] = tcp_hdrlen(skb);
881 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
882 hdr_len[2] = sizeof(struct udphdr);
883 }
884
885 memset(hdr_data, 0, 120);
886 if ((hdr_field >> 6) & 1) {
887 hdr = skb_mac_header(skb);
888 memcpy(hdr_data, hdr, hdr_len[0]);
889 len += hdr_len[0];
890 }
891
892 if ((hdr_field >> 5) & 1) {
893 hdr = skb_network_header(skb);
894 memcpy(hdr_data + len, hdr, hdr_len[1]);
895 len += hdr_len[1];
896 }
897
898 if ((hdr_field >> 4) & 1) {
899 hdr = skb_transport_header(skb);
900 memcpy(hdr_data + len, hdr, hdr_len[2]);
901 len += hdr_len[2];
902 }
903 return len;
904}
905
906/**
907 * create_hdr_descs - create header and header extension descriptors
908 * @hdr_field - bitfield determining needed headers
909 * @data - buffer containing header data
910 * @len - length of data buffer
911 * @hdr_len - array of individual header lengths
912 * @scrq_arr - descriptor array
913 *
914 * Creates header and, if needed, header extension descriptors and
915 * places them in a descriptor array, scrq_arr
916 */
917
918static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
919 union sub_crq *scrq_arr)
920{
921 union sub_crq hdr_desc;
922 int tmp_len = len;
923 u8 *data, *cur;
924 int tmp;
925
926 while (tmp_len > 0) {
927 cur = hdr_data + len - tmp_len;
928
929 memset(&hdr_desc, 0, sizeof(hdr_desc));
930 if (cur != hdr_data) {
931 data = hdr_desc.hdr_ext.data;
932 tmp = tmp_len > 29 ? 29 : tmp_len;
933 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
934 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
935 hdr_desc.hdr_ext.len = tmp;
936 } else {
937 data = hdr_desc.hdr.data;
938 tmp = tmp_len > 24 ? 24 : tmp_len;
939 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
940 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
941 hdr_desc.hdr.len = tmp;
942 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
943 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
944 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
945 hdr_desc.hdr.flag = hdr_field << 1;
946 }
947 memcpy(data, cur, tmp);
948 tmp_len -= tmp;
949 *scrq_arr = hdr_desc;
950 scrq_arr++;
951 }
952}
953
954/**
955 * build_hdr_descs_arr - build a header descriptor array
956 * @skb - socket buffer
957 * @num_entries - number of descriptors to be sent
958 * @subcrq - first TX descriptor
959 * @hdr_field - bit field determining which headers will be sent
960 *
961 * This function will build a TX descriptor array with applicable
962 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
963 */
964
965static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
966 int *num_entries, u8 hdr_field)
967{
968 int hdr_len[3] = {0, 0, 0};
969 int tot_len, len;
970 u8 *hdr_data = txbuff->hdr_data;
971
972 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
973 txbuff->hdr_data);
974 len = tot_len;
975 len -= 24;
976 if (len > 0)
977 num_entries += len % 29 ? len / 29 + 1 : len / 29;
978 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
979 txbuff->indir_arr + 1);
980}
981
032c5e82
TF		 982static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
983{
984 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
985 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 986 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 987 struct device *dev = &adapter->vdev->dev;
988 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 989 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 990 struct ibmvnic_tx_pool *tx_pool;
991 unsigned int tx_send_failed = 0;
992 unsigned int tx_map_failed = 0;
993 unsigned int tx_dropped = 0;
994 unsigned int tx_packets = 0;
995 unsigned int tx_bytes = 0;
996 dma_addr_t data_dma_addr;
997 struct netdev_queue *txq;
032c5e82
TF		 998 unsigned long lpar_rc;
999 union sub_crq tx_crq;
1000 unsigned int offset;
ad7775dc 1001 int num_entries = 1;
032c5e82
TF		 1002 unsigned char *dst;
1003 u64 *handle_array;
1004 int index = 0;
1005 int ret = 0;
1006
ed651a10 1007 if (adapter->resetting) {
7f5b0308
TF		 1008 if (!netif_subqueue_stopped(netdev, skb))
1009 netif_stop_subqueue(netdev, queue_num);
1010 dev_kfree_skb_any(skb);
1011
032c5e82
TF		 1012 tx_send_failed++;
1013 tx_dropped++;
7f5b0308 1014 ret = NETDEV_TX_OK;
032c5e82
TF		 1015 goto out;
1016 }
1017
161b8a81
NF		 1018 tx_pool = &adapter->tx_pool[queue_num];
1019 tx_scrq = adapter->tx_scrq[queue_num];
1020 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1021 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1022 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1023
032c5e82
TF		 1024 index = tx_pool->free_map[tx_pool->consumer_index];
1025 offset = index * adapter->req_mtu;
1026 dst = tx_pool->long_term_buff.buff + offset;
1027 memset(dst, 0, adapter->req_mtu);
1028 skb_copy_from_linear_data(skb, dst, skb->len);
1029 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1030
1031 tx_pool->consumer_index =
1032 (tx_pool->consumer_index + 1) %
068d9f90 1033 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1034
1035 tx_buff = &tx_pool->tx_buff[index];
1036 tx_buff->skb = skb;
1037 tx_buff->data_dma[0] = data_dma_addr;
1038 tx_buff->data_len[0] = skb->len;
1039 tx_buff->index = index;
1040 tx_buff->pool_index = queue_num;
1041 tx_buff->last_frag = true;
032c5e82
TF		 1042
1043 memset(&tx_crq, 0, sizeof(tx_crq));
1044 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1045 tx_crq.v1.type = IBMVNIC_TX_DESC;
1046 tx_crq.v1.n_crq_elem = 1;
1047 tx_crq.v1.n_sge = 1;
1048 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1049 tx_crq.v1.correlator = cpu_to_be32(index);
1050 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1051 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1052 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1053
1054 if (adapter->vlan_header_insertion) {
1055 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1056 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1057 }
1058
1059 if (skb->protocol == htons(ETH_P_IP)) {
1060 if (ip_hdr(skb)->version == 4)
1061 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1062 else if (ip_hdr(skb)->version == 6)
1063 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1064
1065 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1066 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1067 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1068 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1069 }
1070
ad7775dc 1071 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1072 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1073 hdrs += 2;
1074 }
1075 /* determine if l2/3/4 headers are sent to firmware */
1076 if ((*hdrs >> 7) & 1 &&
1077 (skb->protocol == htons(ETH_P_IP) ||
1078 skb->protocol == htons(ETH_P_IPV6))) {
1079 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1080 tx_crq.v1.n_crq_elem = num_entries;
1081 tx_buff->indir_arr[0] = tx_crq;
1082 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1083 sizeof(tx_buff->indir_arr),
1084 DMA_TO_DEVICE);
1085 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1086 dev_kfree_skb_any(skb);
1087 tx_buff->skb = NULL;
ad7775dc
TF		 1088 if (!firmware_has_feature(FW_FEATURE_CMO))
1089 dev_err(dev, "tx: unable to map descriptor array\n");
1090 tx_map_failed++;
1091 tx_dropped++;
7f5b0308 1092 ret = NETDEV_TX_OK;
ad7775dc
TF		 1093 goto out;
1094 }
498cd8e4 1095 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1096 (u64)tx_buff->indir_dma,
1097 (u64)num_entries);
1098 } else {
498cd8e4
JA		 1099 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1100 &tx_crq);
ad7775dc 1101 }
032c5e82
TF		 1102 if (lpar_rc != H_SUCCESS) {
1103 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1104
1105 if (tx_pool->consumer_index == 0)
1106 tx_pool->consumer_index =
068d9f90 1107 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1108 else
1109 tx_pool->consumer_index--;
1110
7f5b0308
TF		 1111 dev_kfree_skb_any(skb);
1112 tx_buff->skb = NULL;
1113
1114 if (lpar_rc == H_CLOSED)
1115 netif_stop_subqueue(netdev, queue_num);
1116
032c5e82
TF		 1117 tx_send_failed++;
1118 tx_dropped++;
7f5b0308 1119 ret = NETDEV_TX_OK;
032c5e82
TF		 1120 goto out;
1121 }
142c0ac4 1122
58c8c0c0
BK		 1123 if (atomic_inc_return(&tx_scrq->used)
1124 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1125 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1126 netif_stop_subqueue(netdev, queue_num);
1127 }
1128
032c5e82
TF		 1129 tx_packets++;
1130 tx_bytes += skb->len;
1131 txq->trans_start = jiffies;
1132 ret = NETDEV_TX_OK;
1133
1134out:
1135 netdev->stats.tx_dropped += tx_dropped;
1136 netdev->stats.tx_bytes += tx_bytes;
1137 netdev->stats.tx_packets += tx_packets;
1138 adapter->tx_send_failed += tx_send_failed;
1139 adapter->tx_map_failed += tx_map_failed;
1140
1141 return ret;
1142}
1143
1144static void ibmvnic_set_multi(struct net_device *netdev)
1145{
1146 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1147 struct netdev_hw_addr *ha;
1148 union ibmvnic_crq crq;
1149
1150 memset(&crq, 0, sizeof(crq));
1151 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1152 crq.request_capability.cmd = REQUEST_CAPABILITY;
1153
1154 if (netdev->flags & IFF_PROMISC) {
1155 if (!adapter->promisc_supported)
1156 return;
1157 } else {
1158 if (netdev->flags & IFF_ALLMULTI) {
1159 /* Accept all multicast */
1160 memset(&crq, 0, sizeof(crq));
1161 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1162 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1163 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1164 ibmvnic_send_crq(adapter, &crq);
1165 } else if (netdev_mc_empty(netdev)) {
1166 /* Reject all multicast */
1167 memset(&crq, 0, sizeof(crq));
1168 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1169 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1170 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1171 ibmvnic_send_crq(adapter, &crq);
1172 } else {
1173 /* Accept one or more multicast(s) */
1174 netdev_for_each_mc_addr(ha, netdev) {
1175 memset(&crq, 0, sizeof(crq));
1176 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1177 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1178 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1179 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1180 ha->addr);
1181 ibmvnic_send_crq(adapter, &crq);
1182 }
1183 }
1184 }
1185}
1186
1187static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1188{
1189 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1190 struct sockaddr *addr = p;
1191 union ibmvnic_crq crq;
1192
1193 if (!is_valid_ether_addr(addr->sa_data))
1194 return -EADDRNOTAVAIL;
1195
1196 memset(&crq, 0, sizeof(crq));
1197 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1198 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1199 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1200 ibmvnic_send_crq(adapter, &crq);
1201 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1202 return 0;
1203}
1204
ed651a10
NF		 1205/**
1206 * do_reset returns zero if we are able to keep processing reset events, or
1207 * non-zero if we hit a fatal error and must halt.
1208 */
1209static int do_reset(struct ibmvnic_adapter *adapter,
1210 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1211{
ed651a10
NF		 1212 struct net_device *netdev = adapter->netdev;
1213 int i, rc;
1214
1215 netif_carrier_off(netdev);
1216 adapter->reset_reason = rwi->reset_reason;
1217
1218 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1219 rc = ibmvnic_reenable_crq_queue(adapter);
1220 if (rc)
1221 return 0;
1222 }
1223
1224 rc = __ibmvnic_close(netdev);
1225 if (rc)
1226 return rc;
1227
1228 /* remove the closed state so when we call open it appears
1229 * we are coming from the probed state.
1230 */
1231 adapter->state = VNIC_PROBED;
032c5e82 1232
ed651a10 1233 release_resources(adapter);
032c5e82 1234 release_sub_crqs(adapter);
ed651a10
NF		 1235 release_crq_queue(adapter);
1236
1237 rc = ibmvnic_init(adapter);
032c5e82 1238 if (rc)
ed651a10
NF		 1239 return 0;
1240
1241 /* If the adapter was in PROBE state prior to the reset, exit here. */
1242 if (reset_state == VNIC_PROBED)
1243 return 0;
1244
1245 rc = ibmvnic_login(netdev);
1246 if (rc) {
1247 adapter->state = VNIC_PROBED;
1248 return 0;
1249 }
1250
1251 rtnl_lock();
1252 rc = init_resources(adapter);
1253 rtnl_unlock();
1254 if (rc)
1255 return rc;
1256
1257 if (reset_state == VNIC_CLOSED)
1258 return 0;
1259
1260 rc = __ibmvnic_open(netdev);
1261 if (rc) {
1262 if (list_empty(&adapter->rwi_list))
1263 adapter->state = VNIC_CLOSED;
1264 else
1265 adapter->state = reset_state;
1266
1267 return 0;
1268 }
1269
1270 netif_carrier_on(netdev);
1271
1272 /* kick napi */
1273 for (i = 0; i < adapter->req_rx_queues; i++)
1274 napi_schedule(&adapter->napi[i]);
1275
1276 return 0;
1277}
1278
1279static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1280{
1281 struct ibmvnic_rwi *rwi;
1282
1283 mutex_lock(&adapter->rwi_lock);
1284
1285 if (!list_empty(&adapter->rwi_list)) {
1286 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1287 list);
1288 list_del(&rwi->list);
1289 } else {
1290 rwi = NULL;
1291 }
1292
1293 mutex_unlock(&adapter->rwi_lock);
1294 return rwi;
1295}
1296
1297static void free_all_rwi(struct ibmvnic_adapter *adapter)
1298{
1299 struct ibmvnic_rwi *rwi;
1300
1301 rwi = get_next_rwi(adapter);
1302 while (rwi) {
1303 kfree(rwi);
1304 rwi = get_next_rwi(adapter);
1305 }
1306}
1307
1308static void __ibmvnic_reset(struct work_struct *work)
1309{
1310 struct ibmvnic_rwi *rwi;
1311 struct ibmvnic_adapter *adapter;
1312 struct net_device *netdev;
1313 u32 reset_state;
1314 int rc;
1315
1316 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1317 netdev = adapter->netdev;
1318
1319 mutex_lock(&adapter->reset_lock);
1320 adapter->resetting = true;
1321 reset_state = adapter->state;
1322
1323 rwi = get_next_rwi(adapter);
1324 while (rwi) {
1325 rc = do_reset(adapter, rwi, reset_state);
1326 kfree(rwi);
1327 if (rc)
1328 break;
1329
1330 rwi = get_next_rwi(adapter);
1331 }
1332
1333 if (rc) {
1334 free_all_rwi(adapter);
6d0af07d 1335 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1336 return;
1337 }
1338
1339 adapter->resetting = false;
1340 mutex_unlock(&adapter->reset_lock);
1341}
1342
1343static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1344 enum ibmvnic_reset_reason reason)
1345{
1346 struct ibmvnic_rwi *rwi, *tmp;
1347 struct net_device *netdev = adapter->netdev;
1348 struct list_head *entry;
1349
1350 if (adapter->state == VNIC_REMOVING ||
1351 adapter->state == VNIC_REMOVED) {
1352 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1353 return;
1354 }
1355
1356 mutex_lock(&adapter->rwi_lock);
1357
1358 list_for_each(entry, &adapter->rwi_list) {
1359 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1360 if (tmp->reset_reason == reason) {
1361 netdev_err(netdev, "Matching reset found, skipping\n");
1362 mutex_unlock(&adapter->rwi_lock);
1363 return;
1364 }
1365 }
1366
1367 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1368 if (!rwi) {
1369 mutex_unlock(&adapter->rwi_lock);
1370 ibmvnic_close(netdev);
1371 return;
1372 }
1373
1374 rwi->reset_reason = reason;
1375 list_add_tail(&rwi->list, &adapter->rwi_list);
1376 mutex_unlock(&adapter->rwi_lock);
1377 schedule_work(&adapter->ibmvnic_reset);
1378}
1379
1380static void ibmvnic_tx_timeout(struct net_device *dev)
1381{
1382 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1383
1384 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1385}
1386
1387static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1388 struct ibmvnic_rx_buff *rx_buff)
1389{
1390 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1391
1392 rx_buff->skb = NULL;
1393
1394 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1395 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1396
1397 atomic_dec(&pool->available);
1398}
1399
1400static int ibmvnic_poll(struct napi_struct *napi, int budget)
1401{
1402 struct net_device *netdev = napi->dev;
1403 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1404 int scrq_num = (int)(napi - adapter->napi);
1405 int frames_processed = 0;
1406restart_poll:
1407 while (frames_processed < budget) {
1408 struct sk_buff *skb;
1409 struct ibmvnic_rx_buff *rx_buff;
1410 union sub_crq *next;
1411 u32 length;
1412 u16 offset;
1413 u8 flags = 0;
1414
1415 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1416 break;
1417 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1418 rx_buff =
1419 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1420 rx_comp.correlator);
1421 /* do error checking */
1422 if (next->rx_comp.rc) {
1423 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1424 /* free the entry */
1425 next->rx_comp.first = 0;
1426 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1427 continue;
032c5e82
TF		 1428 }
1429
1430 length = be32_to_cpu(next->rx_comp.len);
1431 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1432 flags = next->rx_comp.flags;
1433 skb = rx_buff->skb;
1434 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1435 length);
6052d5e2
MFV		 1436
1437 /* VLAN Header has been stripped by the system firmware and
1438 * needs to be inserted by the driver
1439 */
1440 if (adapter->rx_vlan_header_insertion &&
1441 (flags & IBMVNIC_VLAN_STRIPPED))
1442 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1443 ntohs(next->rx_comp.vlan_tci));
1444
032c5e82
TF		 1445 /* free the entry */
1446 next->rx_comp.first = 0;
1447 remove_buff_from_pool(adapter, rx_buff);
1448
1449 skb_put(skb, length);
1450 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1451 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1452
1453 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1454 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1455 skb->ip_summed = CHECKSUM_UNNECESSARY;
1456 }
1457
1458 length = skb->len;
1459 napi_gro_receive(napi, skb); /* send it up */
1460 netdev->stats.rx_packets++;
1461 netdev->stats.rx_bytes += length;
1462 frames_processed++;
1463 }
498cd8e4 1464 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1465
1466 if (frames_processed < budget) {
1467 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1468 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1469 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1470 napi_reschedule(napi)) {
1471 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1472 goto restart_poll;
1473 }
1474 }
1475 return frames_processed;
1476}
1477
1478#ifdef CONFIG_NET_POLL_CONTROLLER
1479static void ibmvnic_netpoll_controller(struct net_device *dev)
1480{
1481 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1482 int i;
1483
1484 replenish_pools(netdev_priv(dev));
1485 for (i = 0; i < adapter->req_rx_queues; i++)
1486 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1487 adapter->rx_scrq[i]);
1488}
1489#endif
1490
1491static const struct net_device_ops ibmvnic_netdev_ops = {
1492 .ndo_open = ibmvnic_open,
1493 .ndo_stop = ibmvnic_close,
1494 .ndo_start_xmit = ibmvnic_xmit,
1495 .ndo_set_rx_mode = ibmvnic_set_multi,
1496 .ndo_set_mac_address = ibmvnic_set_mac,
1497 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1498 .ndo_tx_timeout = ibmvnic_tx_timeout,
1499#ifdef CONFIG_NET_POLL_CONTROLLER
1500 .ndo_poll_controller = ibmvnic_netpoll_controller,
1501#endif
1502};
1503
1504/* ethtool functions */
1505
8a43379f
PR		 1506static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1507 struct ethtool_link_ksettings *cmd)
032c5e82 1508{
8a43379f
PR		 1509 u32 supported, advertising;
1510
1511 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1512 SUPPORTED_FIBRE);
8a43379f 1513 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1514 ADVERTISED_FIBRE);
8a43379f
PR		 1515 cmd->base.speed = SPEED_1000;
1516 cmd->base.duplex = DUPLEX_FULL;
1517 cmd->base.port = PORT_FIBRE;
1518 cmd->base.phy_address = 0;
1519 cmd->base.autoneg = AUTONEG_ENABLE;
1520
1521 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1522 supported);
1523 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1524 advertising);
1525
032c5e82
TF		 1526 return 0;
1527}
1528
1529static void ibmvnic_get_drvinfo(struct net_device *dev,
1530 struct ethtool_drvinfo *info)
1531{
1532 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1533 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1534}
1535
1536static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1537{
1538 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1539
1540 return adapter->msg_enable;
1541}
1542
1543static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1544{
1545 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1546
1547 adapter->msg_enable = data;
1548}
1549
1550static u32 ibmvnic_get_link(struct net_device *netdev)
1551{
1552 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1553
1554 /* Don't need to send a query because we request a logical link up at
1555 * init and then we wait for link state indications
1556 */
1557 return adapter->logical_link_state;
1558}
1559
1560static void ibmvnic_get_ringparam(struct net_device *netdev,
1561 struct ethtool_ringparam *ring)
1562{
1563 ring->rx_max_pending = 0;
1564 ring->tx_max_pending = 0;
1565 ring->rx_mini_max_pending = 0;
1566 ring->rx_jumbo_max_pending = 0;
1567 ring->rx_pending = 0;
1568 ring->tx_pending = 0;
1569 ring->rx_mini_pending = 0;
1570 ring->rx_jumbo_pending = 0;
1571}
1572
1573static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1574{
1575 int i;
1576
1577 if (stringset != ETH_SS_STATS)
1578 return;
1579
1580 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1581 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1582}
1583
1584static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1585{
1586 switch (sset) {
1587 case ETH_SS_STATS:
1588 return ARRAY_SIZE(ibmvnic_stats);
1589 default:
1590 return -EOPNOTSUPP;
1591 }
1592}
1593
1594static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1595 struct ethtool_stats *stats, u64 *data)
1596{
1597 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1598 union ibmvnic_crq crq;
1599 int i;
1600
1601 memset(&crq, 0, sizeof(crq));
1602 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1603 crq.request_statistics.cmd = REQUEST_STATISTICS;
1604 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1605 crq.request_statistics.len =
1606 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1607
1608 /* Wait for data to be written */
1609 init_completion(&adapter->stats_done);
db5d0b59 1610 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1611 wait_for_completion(&adapter->stats_done);
1612
1613 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1614 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1615}
1616
1617static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1618 .get_drvinfo = ibmvnic_get_drvinfo,
1619 .get_msglevel = ibmvnic_get_msglevel,
1620 .set_msglevel = ibmvnic_set_msglevel,
1621 .get_link = ibmvnic_get_link,
1622 .get_ringparam = ibmvnic_get_ringparam,
1623 .get_strings = ibmvnic_get_strings,
1624 .get_sset_count = ibmvnic_get_sset_count,
1625 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1626 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1627};
1628
1629/* Routines for managing CRQs/sCRQs */
1630
1631static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1632 struct ibmvnic_sub_crq_queue *scrq)
1633{
1634 struct device *dev = &adapter->vdev->dev;
1635 long rc;
1636
1637 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1638
1639 /* Close the sub-crqs */
1640 do {
1641 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1642 adapter->vdev->unit_address,
1643 scrq->crq_num);
1644 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1645
ffa73855
TF		 1646 if (rc) {
1647 netdev_err(adapter->netdev,
1648 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1649 scrq->crq_num, rc);
1650 }
1651
032c5e82
TF		 1652 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1653 DMA_BIDIRECTIONAL);
1654 free_pages((unsigned long)scrq->msgs, 2);
1655 kfree(scrq);
1656}
1657
1658static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1659 *adapter)
1660{
1661 struct device *dev = &adapter->vdev->dev;
1662 struct ibmvnic_sub_crq_queue *scrq;
1663 int rc;
1664
1bb3c739 1665 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1666 if (!scrq)
1667 return NULL;
1668
7f7adc50 1669 scrq->msgs =
1bb3c739 1670 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1671 if (!scrq->msgs) {
1672 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1673 goto zero_page_failed;
1674 }
1675
1676 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1677 DMA_BIDIRECTIONAL);
1678 if (dma_mapping_error(dev, scrq->msg_token)) {
1679 dev_warn(dev, "Couldn't map crq queue messages page\n");
1680 goto map_failed;
1681 }
1682
1683 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1684 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1685
1686 if (rc == H_RESOURCE)
1687 rc = ibmvnic_reset_crq(adapter);
1688
1689 if (rc == H_CLOSED) {
1690 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1691 } else if (rc) {
1692 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1693 goto reg_failed;
1694 }
1695
032c5e82
TF		 1696 scrq->adapter = adapter;
1697 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1698 spin_lock_init(&scrq->lock);
1699
1700 netdev_dbg(adapter->netdev,
1701 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1702 scrq->crq_num, scrq->hw_irq, scrq->irq);
1703
1704 return scrq;
1705
032c5e82
TF		 1706reg_failed:
1707 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1708 DMA_BIDIRECTIONAL);
1709map_failed:
1710 free_pages((unsigned long)scrq->msgs, 2);
1711zero_page_failed:
1712 kfree(scrq);
1713
1714 return NULL;
1715}
1716
1717static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1718{
1719 int i;
1720
1721 if (adapter->tx_scrq) {
b510888f
NF		 1722 for (i = 0; i < adapter->req_tx_queues; i++) {
1723 if (!adapter->tx_scrq[i])
1724 continue;
1725
1726 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1727 free_irq(adapter->tx_scrq[i]->irq,
1728 adapter->tx_scrq[i]);
88eb98a0 1729 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1730 adapter->tx_scrq[i]->irq = 0;
032c5e82 1731 }
b510888f
NF		 1732
1733 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1734 }
1735
9501df3c 1736 kfree(adapter->tx_scrq);
032c5e82
TF		 1737 adapter->tx_scrq = NULL;
1738 }
1739
1740 if (adapter->rx_scrq) {
b510888f
NF		 1741 for (i = 0; i < adapter->req_rx_queues; i++) {
1742 if (!adapter->rx_scrq[i])
1743 continue;
1744
1745 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1746 free_irq(adapter->rx_scrq[i]->irq,
1747 adapter->rx_scrq[i]);
88eb98a0 1748 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1749 adapter->rx_scrq[i]->irq = 0;
032c5e82 1750 }
032c5e82 1751
b510888f
NF		 1752 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1753 }
ea22d51a 1754
b510888f 1755 kfree(adapter->rx_scrq);
ea22d51a
TF		 1756 adapter->rx_scrq = NULL;
1757 }
ea22d51a
TF		 1758}
1759
032c5e82
TF		 1760static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1761 struct ibmvnic_sub_crq_queue *scrq)
1762{
1763 struct device *dev = &adapter->vdev->dev;
1764 unsigned long rc;
1765
1766 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1767 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1768 if (rc)
1769 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1770 scrq->hw_irq, rc);
1771 return rc;
1772}
1773
1774static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1775 struct ibmvnic_sub_crq_queue *scrq)
1776{
1777 struct device *dev = &adapter->vdev->dev;
1778 unsigned long rc;
1779
1780 if (scrq->hw_irq > 0x100000000ULL) {
1781 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1782 return 1;
1783 }
1784
1785 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1786 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1787 if (rc)
1788 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1789 scrq->hw_irq, rc);
1790 return rc;
1791}
1792
1793static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1794 struct ibmvnic_sub_crq_queue *scrq)
1795{
1796 struct device *dev = &adapter->vdev->dev;
1797 struct ibmvnic_tx_buff *txbuff;
1798 union sub_crq *next;
1799 int index;
1800 int i, j;
ad7775dc 1801 u8 first;
032c5e82
TF		 1802
1803restart_loop:
1804 while (pending_scrq(adapter, scrq)) {
1805 unsigned int pool = scrq->pool_index;
1806
1807 next = ibmvnic_next_scrq(adapter, scrq);
1808 for (i = 0; i < next->tx_comp.num_comps; i++) {
1809 if (next->tx_comp.rcs[i]) {
1810 dev_err(dev, "tx error %x\n",
1811 next->tx_comp.rcs[i]);
1812 continue;
1813 }
1814 index = be32_to_cpu(next->tx_comp.correlators[i]);
1815 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1816
1817 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1818 if (!txbuff->data_dma[j])
1819 continue;
1820
1821 txbuff->data_dma[j] = 0;
032c5e82 1822 }
ad7775dc
TF		 1823 /* if sub_crq was sent indirectly */
1824 first = txbuff->indir_arr[0].generic.first;
1825 if (first == IBMVNIC_CRQ_CMD) {
1826 dma_unmap_single(dev, txbuff->indir_dma,
1827 sizeof(txbuff->indir_arr),
1828 DMA_TO_DEVICE);
1829 }
032c5e82 1830
142c0ac4 1831 if (txbuff->last_frag) {
032c5e82 1832 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 1833 txbuff->skb = NULL;
142c0ac4 1834 }
032c5e82
TF		 1835
1836 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1837 producer_index] = index;
1838 adapter->tx_pool[pool].producer_index =
1839 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1840 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1841 }
1842 /* remove tx_comp scrq*/
1843 next->tx_comp.first = 0;
7c3e7de3
NF		 1844
1845 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1846 (adapter->req_tx_entries_per_subcrq / 2) &&
1847 __netif_subqueue_stopped(adapter->netdev,
1848 scrq->pool_index)) {
1849 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
1850 netdev_info(adapter->netdev, "Started queue %d\n",
1851 scrq->pool_index);
1852 }
032c5e82
TF		 1853 }
1854
1855 enable_scrq_irq(adapter, scrq);
1856
1857 if (pending_scrq(adapter, scrq)) {
1858 disable_scrq_irq(adapter, scrq);
1859 goto restart_loop;
1860 }
1861
1862 return 0;
1863}
1864
1865static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1866{
1867 struct ibmvnic_sub_crq_queue *scrq = instance;
1868 struct ibmvnic_adapter *adapter = scrq->adapter;
1869
1870 disable_scrq_irq(adapter, scrq);
1871 ibmvnic_complete_tx(adapter, scrq);
1872
1873 return IRQ_HANDLED;
1874}
1875
1876static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1877{
1878 struct ibmvnic_sub_crq_queue *scrq = instance;
1879 struct ibmvnic_adapter *adapter = scrq->adapter;
1880
1881 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1882 disable_scrq_irq(adapter, scrq);
1883 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1884 }
1885
1886 return IRQ_HANDLED;
1887}
1888
ea22d51a
TF		 1889static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1890{
1891 struct device *dev = &adapter->vdev->dev;
1892 struct ibmvnic_sub_crq_queue *scrq;
1893 int i = 0, j = 0;
1894 int rc = 0;
1895
1896 for (i = 0; i < adapter->req_tx_queues; i++) {
1897 scrq = adapter->tx_scrq[i];
1898 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1899
99c1790e 1900 if (!scrq->irq) {
ea22d51a
TF		 1901 rc = -EINVAL;
1902 dev_err(dev, "Error mapping irq\n");
1903 goto req_tx_irq_failed;
1904 }
1905
1906 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1907 0, "ibmvnic_tx", scrq);
1908
1909 if (rc) {
1910 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1911 scrq->irq, rc);
1912 irq_dispose_mapping(scrq->irq);
1913 goto req_rx_irq_failed;
1914 }
1915 }
1916
1917 for (i = 0; i < adapter->req_rx_queues; i++) {
1918 scrq = adapter->rx_scrq[i];
1919 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1920 if (!scrq->irq) {
ea22d51a
TF		 1921 rc = -EINVAL;
1922 dev_err(dev, "Error mapping irq\n");
1923 goto req_rx_irq_failed;
1924 }
1925 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1926 0, "ibmvnic_rx", scrq);
1927 if (rc) {
1928 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1929 scrq->irq, rc);
1930 irq_dispose_mapping(scrq->irq);
1931 goto req_rx_irq_failed;
1932 }
1933 }
1934 return rc;
1935
1936req_rx_irq_failed:
8bf371e6 1937 for (j = 0; j < i; j++) {
ea22d51a
TF		 1938 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1939 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1940 }
ea22d51a
TF		 1941 i = adapter->req_tx_queues;
1942req_tx_irq_failed:
8bf371e6 1943 for (j = 0; j < i; j++) {
ea22d51a
TF		 1944 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1945 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1946 }
b510888f 1947 release_sub_crqs(adapter);
ea22d51a
TF		 1948 return rc;
1949}
1950
d346b9bc 1951static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 1952{
1953 struct device *dev = &adapter->vdev->dev;
1954 struct ibmvnic_sub_crq_queue **allqueues;
1955 int registered_queues = 0;
032c5e82
TF		 1956 int total_queues;
1957 int more = 0;
ea22d51a 1958 int i;
032c5e82 1959
032c5e82
TF		 1960 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1961
1bb3c739 1962 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 1963 if (!allqueues)
d346b9bc 1964 return -1;
032c5e82
TF		 1965
1966 for (i = 0; i < total_queues; i++) {
1967 allqueues[i] = init_sub_crq_queue(adapter);
1968 if (!allqueues[i]) {
1969 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1970 break;
1971 }
1972 registered_queues++;
1973 }
1974
1975 /* Make sure we were able to register the minimum number of queues */
1976 if (registered_queues <
1977 adapter->min_tx_queues + adapter->min_rx_queues) {
1978 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1979 goto tx_failed;
1980 }
1981
1982 /* Distribute the failed allocated queues*/
1983 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1984 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1985 switch (i % 3) {
1986 case 0:
1987 if (adapter->req_rx_queues > adapter->min_rx_queues)
1988 adapter->req_rx_queues--;
1989 else
1990 more++;
1991 break;
1992 case 1:
1993 if (adapter->req_tx_queues > adapter->min_tx_queues)
1994 adapter->req_tx_queues--;
1995 else
1996 more++;
1997 break;
1998 }
1999 }
2000
2001 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2002 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2003 if (!adapter->tx_scrq)
2004 goto tx_failed;
2005
2006 for (i = 0; i < adapter->req_tx_queues; i++) {
2007 adapter->tx_scrq[i] = allqueues[i];
2008 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2009 }
2010
2011 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2012 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2013 if (!adapter->rx_scrq)
2014 goto rx_failed;
2015
2016 for (i = 0; i < adapter->req_rx_queues; i++) {
2017 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2018 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2019 }
2020
d346b9bc
NF		 2021 kfree(allqueues);
2022 return 0;
2023
2024rx_failed:
2025 kfree(adapter->tx_scrq);
2026 adapter->tx_scrq = NULL;
2027tx_failed:
2028 for (i = 0; i < registered_queues; i++)
2029 release_sub_crq_queue(adapter, allqueues[i]);
2030 kfree(allqueues);
2031 return -1;
2032}
2033
2034static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2035{
2036 struct device *dev = &adapter->vdev->dev;
2037 union ibmvnic_crq crq;
d346b9bc
NF		 2038
2039 if (!retry) {
2040 /* Sub-CRQ entries are 32 byte long */
2041 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2042
2043 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2044 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2045 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2046 return;
2047 }
2048
2049 /* Get the minimum between the queried max and the entries
2050 * that fit in our PAGE_SIZE
2051 */
2052 adapter->req_tx_entries_per_subcrq =
2053 adapter->max_tx_entries_per_subcrq > entries_page ?
2054 entries_page : adapter->max_tx_entries_per_subcrq;
2055 adapter->req_rx_add_entries_per_subcrq =
2056 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2057 entries_page : adapter->max_rx_add_entries_per_subcrq;
2058
2059 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2060 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2061 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2062
2063 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2064 }
2065
032c5e82
TF		 2066 memset(&crq, 0, sizeof(crq));
2067 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2068 crq.request_capability.cmd = REQUEST_CAPABILITY;
2069
2070 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2071 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2072 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2073 ibmvnic_send_crq(adapter, &crq);
2074
2075 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2076 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2077 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2078 ibmvnic_send_crq(adapter, &crq);
2079
2080 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2081 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2082 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2083 ibmvnic_send_crq(adapter, &crq);
2084
2085 crq.request_capability.capability =
2086 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2087 crq.request_capability.number =
de89e854 2088 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2089 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2090 ibmvnic_send_crq(adapter, &crq);
2091
2092 crq.request_capability.capability =
2093 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2094 crq.request_capability.number =
de89e854 2095 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2096 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2097 ibmvnic_send_crq(adapter, &crq);
2098
2099 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2100 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2101 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2102 ibmvnic_send_crq(adapter, &crq);
2103
2104 if (adapter->netdev->flags & IFF_PROMISC) {
2105 if (adapter->promisc_supported) {
2106 crq.request_capability.capability =
2107 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2108 crq.request_capability.number = cpu_to_be64(1);
901e040a 2109 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2110 ibmvnic_send_crq(adapter, &crq);
2111 }
2112 } else {
2113 crq.request_capability.capability =
2114 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2115 crq.request_capability.number = cpu_to_be64(0);
901e040a 2116 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2117 ibmvnic_send_crq(adapter, &crq);
2118 }
032c5e82
TF		 2119}
2120
2121static int pending_scrq(struct ibmvnic_adapter *adapter,
2122 struct ibmvnic_sub_crq_queue *scrq)
2123{
2124 union sub_crq *entry = &scrq->msgs[scrq->cur];
2125
90c8014c
NF		 2126 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2127 adapter->state == VNIC_CLOSING)
032c5e82
TF		 2128 return 1;
2129 else
2130 return 0;
2131}
2132
2133static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2134 struct ibmvnic_sub_crq_queue *scrq)
2135{
2136 union sub_crq *entry;
2137 unsigned long flags;
2138
2139 spin_lock_irqsave(&scrq->lock, flags);
2140 entry = &scrq->msgs[scrq->cur];
2141 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2142 if (++scrq->cur == scrq->size)
2143 scrq->cur = 0;
2144 } else {
2145 entry = NULL;
2146 }
2147 spin_unlock_irqrestore(&scrq->lock, flags);
2148
2149 return entry;
2150}
2151
2152static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2153{
2154 struct ibmvnic_crq_queue *queue = &adapter->crq;
2155 union ibmvnic_crq *crq;
2156
2157 crq = &queue->msgs[queue->cur];
2158 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2159 if (++queue->cur == queue->size)
2160 queue->cur = 0;
2161 } else {
2162 crq = NULL;
2163 }
2164
2165 return crq;
2166}
2167
2168static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2169 union sub_crq *sub_crq)
2170{
2171 unsigned int ua = adapter->vdev->unit_address;
2172 struct device *dev = &adapter->vdev->dev;
2173 u64 *u64_crq = (u64 *)sub_crq;
2174 int rc;
2175
2176 netdev_dbg(adapter->netdev,
2177 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2178 (unsigned long int)cpu_to_be64(remote_handle),
2179 (unsigned long int)cpu_to_be64(u64_crq[0]),
2180 (unsigned long int)cpu_to_be64(u64_crq[1]),
2181 (unsigned long int)cpu_to_be64(u64_crq[2]),
2182 (unsigned long int)cpu_to_be64(u64_crq[3]));
2183
2184 /* Make sure the hypervisor sees the complete request */
2185 mb();
2186
2187 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2188 cpu_to_be64(remote_handle),
2189 cpu_to_be64(u64_crq[0]),
2190 cpu_to_be64(u64_crq[1]),
2191 cpu_to_be64(u64_crq[2]),
2192 cpu_to_be64(u64_crq[3]));
2193
2194 if (rc) {
2195 if (rc == H_CLOSED)
2196 dev_warn(dev, "CRQ Queue closed\n");
2197 dev_err(dev, "Send error (rc=%d)\n", rc);
2198 }
2199
2200 return rc;
2201}
2202
ad7775dc
TF		 2203static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2204 u64 remote_handle, u64 ioba, u64 num_entries)
2205{
2206 unsigned int ua = adapter->vdev->unit_address;
2207 struct device *dev = &adapter->vdev->dev;
2208 int rc;
2209
2210 /* Make sure the hypervisor sees the complete request */
2211 mb();
2212 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2213 cpu_to_be64(remote_handle),
2214 ioba, num_entries);
2215
2216 if (rc) {
2217 if (rc == H_CLOSED)
2218 dev_warn(dev, "CRQ Queue closed\n");
2219 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2220 }
2221
2222 return rc;
2223}
2224
032c5e82
TF		 2225static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2226 union ibmvnic_crq *crq)
2227{
2228 unsigned int ua = adapter->vdev->unit_address;
2229 struct device *dev = &adapter->vdev->dev;
2230 u64 *u64_crq = (u64 *)crq;
2231 int rc;
2232
2233 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2234 (unsigned long int)cpu_to_be64(u64_crq[0]),
2235 (unsigned long int)cpu_to_be64(u64_crq[1]));
2236
2237 /* Make sure the hypervisor sees the complete request */
2238 mb();
2239
2240 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2241 cpu_to_be64(u64_crq[0]),
2242 cpu_to_be64(u64_crq[1]));
2243
2244 if (rc) {
2245 if (rc == H_CLOSED)
2246 dev_warn(dev, "CRQ Queue closed\n");
2247 dev_warn(dev, "Send error (rc=%d)\n", rc);
2248 }
2249
2250 return rc;
2251}
2252
2253static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2254{
2255 union ibmvnic_crq crq;
2256
2257 memset(&crq, 0, sizeof(crq));
2258 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2259 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2260 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2261
2262 return ibmvnic_send_crq(adapter, &crq);
2263}
2264
032c5e82
TF		 2265static int send_version_xchg(struct ibmvnic_adapter *adapter)
2266{
2267 union ibmvnic_crq crq;
2268
2269 memset(&crq, 0, sizeof(crq));
2270 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2271 crq.version_exchange.cmd = VERSION_EXCHANGE;
2272 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2273
2274 return ibmvnic_send_crq(adapter, &crq);
2275}
2276
2277static void send_login(struct ibmvnic_adapter *adapter)
2278{
2279 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2280 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2281 struct device *dev = &adapter->vdev->dev;
2282 dma_addr_t rsp_buffer_token;
2283 dma_addr_t buffer_token;
2284 size_t rsp_buffer_size;
2285 union ibmvnic_crq crq;
032c5e82
TF		 2286 size_t buffer_size;
2287 __be64 *tx_list_p;
2288 __be64 *rx_list_p;
2289 int i;
2290
2291 buffer_size =
2292 sizeof(struct ibmvnic_login_buffer) +
2293 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2294
2295 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2296 if (!login_buffer)
2297 goto buf_alloc_failed;
2298
2299 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2300 DMA_TO_DEVICE);
2301 if (dma_mapping_error(dev, buffer_token)) {
2302 dev_err(dev, "Couldn't map login buffer\n");
2303 goto buf_map_failed;
2304 }
2305
498cd8e4
JA		 2306 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2307 sizeof(u64) * adapter->req_tx_queues +
2308 sizeof(u64) * adapter->req_rx_queues +
2309 sizeof(u64) * adapter->req_rx_queues +
2310 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2311
2312 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2313 if (!login_rsp_buffer)
2314 goto buf_rsp_alloc_failed;
2315
2316 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2317 rsp_buffer_size, DMA_FROM_DEVICE);
2318 if (dma_mapping_error(dev, rsp_buffer_token)) {
2319 dev_err(dev, "Couldn't map login rsp buffer\n");
2320 goto buf_rsp_map_failed;
2321 }
661a2622 2322
032c5e82
TF		 2323 adapter->login_buf = login_buffer;
2324 adapter->login_buf_token = buffer_token;
2325 adapter->login_buf_sz = buffer_size;
2326 adapter->login_rsp_buf = login_rsp_buffer;
2327 adapter->login_rsp_buf_token = rsp_buffer_token;
2328 adapter->login_rsp_buf_sz = rsp_buffer_size;
2329
2330 login_buffer->len = cpu_to_be32(buffer_size);
2331 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2332 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2333 login_buffer->off_txcomp_subcrqs =
2334 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2335 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2336 login_buffer->off_rxcomp_subcrqs =
2337 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2338 sizeof(u64) * adapter->req_tx_queues);
2339 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2340 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2341
2342 tx_list_p = (__be64 *)((char *)login_buffer +
2343 sizeof(struct ibmvnic_login_buffer));
2344 rx_list_p = (__be64 *)((char *)login_buffer +
2345 sizeof(struct ibmvnic_login_buffer) +
2346 sizeof(u64) * adapter->req_tx_queues);
2347
2348 for (i = 0; i < adapter->req_tx_queues; i++) {
2349 if (adapter->tx_scrq[i]) {
2350 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2351 crq_num);
2352 }
2353 }
2354
2355 for (i = 0; i < adapter->req_rx_queues; i++) {
2356 if (adapter->rx_scrq[i]) {
2357 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2358 crq_num);
2359 }
2360 }
2361
2362 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2363 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2364 netdev_dbg(adapter->netdev, "%016lx\n",
2365 ((unsigned long int *)(adapter->login_buf))[i]);
2366 }
2367
2368 memset(&crq, 0, sizeof(crq));
2369 crq.login.first = IBMVNIC_CRQ_CMD;
2370 crq.login.cmd = LOGIN;
2371 crq.login.ioba = cpu_to_be32(buffer_token);
2372 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2373 ibmvnic_send_crq(adapter, &crq);
2374
2375 return;
2376
032c5e82
TF		 2377buf_rsp_map_failed:
2378 kfree(login_rsp_buffer);
2379buf_rsp_alloc_failed:
2380 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2381buf_map_failed:
2382 kfree(login_buffer);
2383buf_alloc_failed:
2384 return;
2385}
2386
2387static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2388 u32 len, u8 map_id)
2389{
2390 union ibmvnic_crq crq;
2391
2392 memset(&crq, 0, sizeof(crq));
2393 crq.request_map.first = IBMVNIC_CRQ_CMD;
2394 crq.request_map.cmd = REQUEST_MAP;
2395 crq.request_map.map_id = map_id;
2396 crq.request_map.ioba = cpu_to_be32(addr);
2397 crq.request_map.len = cpu_to_be32(len);
2398 ibmvnic_send_crq(adapter, &crq);
2399}
2400
2401static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2402{
2403 union ibmvnic_crq crq;
2404
2405 memset(&crq, 0, sizeof(crq));
2406 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2407 crq.request_unmap.cmd = REQUEST_UNMAP;
2408 crq.request_unmap.map_id = map_id;
2409 ibmvnic_send_crq(adapter, &crq);
2410}
2411
2412static void send_map_query(struct ibmvnic_adapter *adapter)
2413{
2414 union ibmvnic_crq crq;
2415
2416 memset(&crq, 0, sizeof(crq));
2417 crq.query_map.first = IBMVNIC_CRQ_CMD;
2418 crq.query_map.cmd = QUERY_MAP;
2419 ibmvnic_send_crq(adapter, &crq);
2420}
2421
2422/* Send a series of CRQs requesting various capabilities of the VNIC server */
2423static void send_cap_queries(struct ibmvnic_adapter *adapter)
2424{
2425 union ibmvnic_crq crq;
2426
901e040a 2427 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2428 memset(&crq, 0, sizeof(crq));
2429 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2430 crq.query_capability.cmd = QUERY_CAPABILITY;
2431
2432 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2433 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2434 ibmvnic_send_crq(adapter, &crq);
2435
2436 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2437 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2438 ibmvnic_send_crq(adapter, &crq);
2439
2440 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2441 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2442 ibmvnic_send_crq(adapter, &crq);
2443
2444 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2445 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2446 ibmvnic_send_crq(adapter, &crq);
2447
2448 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2449 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2450 ibmvnic_send_crq(adapter, &crq);
2451
2452 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2453 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2454 ibmvnic_send_crq(adapter, &crq);
2455
2456 crq.query_capability.capability =
2457 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2458 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2459 ibmvnic_send_crq(adapter, &crq);
2460
2461 crq.query_capability.capability =
2462 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2463 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2464 ibmvnic_send_crq(adapter, &crq);
2465
2466 crq.query_capability.capability =
2467 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2468 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2469 ibmvnic_send_crq(adapter, &crq);
2470
2471 crq.query_capability.capability =
2472 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2473 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2474 ibmvnic_send_crq(adapter, &crq);
2475
2476 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2477 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2478 ibmvnic_send_crq(adapter, &crq);
2479
2480 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2481 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2482 ibmvnic_send_crq(adapter, &crq);
2483
2484 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2485 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2486 ibmvnic_send_crq(adapter, &crq);
2487
2488 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2489 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2490 ibmvnic_send_crq(adapter, &crq);
2491
2492 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2493 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2494 ibmvnic_send_crq(adapter, &crq);
2495
2496 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2497 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2498 ibmvnic_send_crq(adapter, &crq);
2499
6052d5e2
MFV		 2500 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2501 atomic_inc(&adapter->running_cap_crqs);
2502 ibmvnic_send_crq(adapter, &crq);
2503
032c5e82 2504 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2505 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2506 ibmvnic_send_crq(adapter, &crq);
2507
2508 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2509 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2510 ibmvnic_send_crq(adapter, &crq);
2511
2512 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2513 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2514 ibmvnic_send_crq(adapter, &crq);
2515
2516 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2517 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2518 ibmvnic_send_crq(adapter, &crq);
2519
2520 crq.query_capability.capability =
2521 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2522 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2523 ibmvnic_send_crq(adapter, &crq);
2524
2525 crq.query_capability.capability =
2526 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2527 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2528 ibmvnic_send_crq(adapter, &crq);
2529
2530 crq.query_capability.capability =
2531 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2532 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2533 ibmvnic_send_crq(adapter, &crq);
2534
2535 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2536 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2537 ibmvnic_send_crq(adapter, &crq);
2538}
2539
2540static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2541{
2542 struct device *dev = &adapter->vdev->dev;
2543 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2544 union ibmvnic_crq crq;
2545 int i;
2546
2547 dma_unmap_single(dev, adapter->ip_offload_tok,
2548 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2549
2550 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2551 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2552 netdev_dbg(adapter->netdev, "%016lx\n",
2553 ((unsigned long int *)(buf))[i]);
2554
2555 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2556 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2557 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2558 buf->tcp_ipv4_chksum);
2559 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2560 buf->tcp_ipv6_chksum);
2561 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2562 buf->udp_ipv4_chksum);
2563 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2564 buf->udp_ipv6_chksum);
2565 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2566 buf->large_tx_ipv4);
2567 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2568 buf->large_tx_ipv6);
2569 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2570 buf->large_rx_ipv4);
2571 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2572 buf->large_rx_ipv6);
2573 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2574 buf->max_ipv4_header_size);
2575 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2576 buf->max_ipv6_header_size);
2577 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2578 buf->max_tcp_header_size);
2579 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2580 buf->max_udp_header_size);
2581 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2582 buf->max_large_tx_size);
2583 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2584 buf->max_large_rx_size);
2585 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2586 buf->ipv6_extension_header);
2587 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2588 buf->tcp_pseudosum_req);
2589 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2590 buf->num_ipv6_ext_headers);
2591 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2592 buf->off_ipv6_ext_headers);
2593
2594 adapter->ip_offload_ctrl_tok =
2595 dma_map_single(dev, &adapter->ip_offload_ctrl,
2596 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2597
2598 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2599 dev_err(dev, "Couldn't map ip offload control buffer\n");
2600 return;
2601 }
2602
2603 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2604 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2605 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2606 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2607 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2608
2609 /* large_tx/rx disabled for now, additional features needed */
2610 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2611 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2612 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2613 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2614
2615 adapter->netdev->features = NETIF_F_GSO;
2616
2617 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2618 adapter->netdev->features |= NETIF_F_IP_CSUM;
2619
2620 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2621 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2622
9be02cdf
TF		 2623 if ((adapter->netdev->features &
2624 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2625 adapter->netdev->features |= NETIF_F_RXCSUM;
2626
032c5e82
TF		 2627 memset(&crq, 0, sizeof(crq));
2628 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2629 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2630 crq.control_ip_offload.len =
2631 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2632 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2633 ibmvnic_send_crq(adapter, &crq);
2634}
2635
2636static void handle_error_info_rsp(union ibmvnic_crq *crq,
2637 struct ibmvnic_adapter *adapter)
2638{
2639 struct device *dev = &adapter->vdev->dev;
96183182 2640 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2641 unsigned long flags;
2642 bool found = false;
2643 int i;
2644
2645 if (!crq->request_error_rsp.rc.code) {
2646 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2647 crq->request_error_rsp.rc.code);
2648 return;
2649 }
2650
2651 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2652 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2653 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2654 found = true;
2655 list_del(&error_buff->list);
2656 break;
2657 }
2658 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2659
2660 if (!found) {
2661 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2662 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2663 return;
2664 }
2665
2666 dev_err(dev, "Detailed info for error id %x:",
75224c93 2667 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2668
2669 for (i = 0; i < error_buff->len; i++) {
2670 pr_cont("%02x", (int)error_buff->buff[i]);
2671 if (i % 8 == 7)
2672 pr_cont(" ");
2673 }
2674 pr_cont("\n");
2675
2676 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2677 DMA_FROM_DEVICE);
2678 kfree(error_buff->buff);
2679 kfree(error_buff);
2680}
2681
2f9de9ba
NF		 2682static void request_error_information(struct ibmvnic_adapter *adapter,
2683 union ibmvnic_crq *err_crq)
032c5e82 2684{
032c5e82 2685 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2686 struct net_device *netdev = adapter->netdev;
032c5e82 2687 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2688 unsigned long timeout = msecs_to_jiffies(30000);
2689 union ibmvnic_crq crq;
032c5e82 2690 unsigned long flags;
2f9de9ba 2691 int rc, detail_len;
032c5e82
TF		 2692
2693 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2694 if (!error_buff)
2695 return;
2696
2f9de9ba 2697 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2698 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2699 if (!error_buff->buff) {
2700 kfree(error_buff);
2701 return;
2702 }
2703
2704 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2705 DMA_FROM_DEVICE);
2706 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2707 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2708 kfree(error_buff->buff);
2709 kfree(error_buff);
2710 return;
2711 }
2712
032c5e82 2713 error_buff->len = detail_len;
2f9de9ba 2714 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2715
2716 spin_lock_irqsave(&adapter->error_list_lock, flags);
2717 list_add_tail(&error_buff->list, &adapter->errors);
2718 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2719
2f9de9ba
NF		 2720 memset(&crq, 0, sizeof(crq));
2721 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2722 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2723 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2724 crq.request_error_info.len = cpu_to_be32(detail_len);
2725 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2726
2727 rc = ibmvnic_send_crq(adapter, &crq);
2728 if (rc) {
2729 netdev_err(netdev, "failed to request error information\n");
2730 goto err_info_fail;
2731 }
2732
2733 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2734 netdev_err(netdev, "timeout waiting for error information\n");
2735 goto err_info_fail;
2736 }
2737
2738 return;
2739
2740err_info_fail:
2741 spin_lock_irqsave(&adapter->error_list_lock, flags);
2742 list_del(&error_buff->list);
2743 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2744
2745 kfree(error_buff->buff);
2746 kfree(error_buff);
2747}
2748
2749static void handle_error_indication(union ibmvnic_crq *crq,
2750 struct ibmvnic_adapter *adapter)
2751{
2752 struct device *dev = &adapter->vdev->dev;
2753
2754 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2755 crq->error_indication.flags
2756 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2757 be32_to_cpu(crq->error_indication.error_id),
2758 be16_to_cpu(crq->error_indication.error_cause));
2759
2760 if (be32_to_cpu(crq->error_indication.error_id))
2761 request_error_information(adapter, crq);
ed651a10
NF		 2762
2763 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2764 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 2765}
2766
2767static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2768 struct ibmvnic_adapter *adapter)
2769{
2770 struct net_device *netdev = adapter->netdev;
2771 struct device *dev = &adapter->vdev->dev;
2772 long rc;
2773
2774 rc = crq->change_mac_addr_rsp.rc.code;
2775 if (rc) {
2776 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2777 return;
2778 }
2779 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2780 ETH_ALEN);
2781}
2782
2783static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2784 struct ibmvnic_adapter *adapter)
2785{
2786 struct device *dev = &adapter->vdev->dev;
2787 u64 *req_value;
2788 char *name;
2789
901e040a 2790 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2791 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2792 case REQ_TX_QUEUES:
2793 req_value = &adapter->req_tx_queues;
2794 name = "tx";
2795 break;
2796 case REQ_RX_QUEUES:
2797 req_value = &adapter->req_rx_queues;
2798 name = "rx";
2799 break;
2800 case REQ_RX_ADD_QUEUES:
2801 req_value = &adapter->req_rx_add_queues;
2802 name = "rx_add";
2803 break;
2804 case REQ_TX_ENTRIES_PER_SUBCRQ:
2805 req_value = &adapter->req_tx_entries_per_subcrq;
2806 name = "tx_entries_per_subcrq";
2807 break;
2808 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2809 req_value = &adapter->req_rx_add_entries_per_subcrq;
2810 name = "rx_add_entries_per_subcrq";
2811 break;
2812 case REQ_MTU:
2813 req_value = &adapter->req_mtu;
2814 name = "mtu";
2815 break;
2816 case PROMISC_REQUESTED:
2817 req_value = &adapter->promisc;
2818 name = "promisc";
2819 break;
2820 default:
2821 dev_err(dev, "Got invalid cap request rsp %d\n",
2822 crq->request_capability.capability);
2823 return;
2824 }
2825
2826 switch (crq->request_capability_rsp.rc.code) {
2827 case SUCCESS:
2828 break;
2829 case PARTIALSUCCESS:
2830 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2831 *req_value,
28f4d165 2832 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2833 number), name);
b510888f 2834 release_sub_crqs(adapter);
28f4d165 2835 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 2836 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 2837 return;
2838 default:
2839 dev_err(dev, "Error %d in request cap rsp\n",
2840 crq->request_capability_rsp.rc.code);
2841 return;
2842 }
2843
2844 /* Done receiving requested capabilities, query IP offload support */
901e040a 2845 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2846 union ibmvnic_crq newcrq;
2847 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2848 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2849 &adapter->ip_offload_buf;
2850
249168ad 2851 adapter->wait_capability = false;
032c5e82
TF		 2852 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2853 buf_sz,
2854 DMA_FROM_DEVICE);
2855
2856 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2857 if (!firmware_has_feature(FW_FEATURE_CMO))
2858 dev_err(dev, "Couldn't map offload buffer\n");
2859 return;
2860 }
2861
2862 memset(&newcrq, 0, sizeof(newcrq));
2863 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2864 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2865 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2866 newcrq.query_ip_offload.ioba =
2867 cpu_to_be32(adapter->ip_offload_tok);
2868
2869 ibmvnic_send_crq(adapter, &newcrq);
2870 }
2871}
2872
2873static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2874 struct ibmvnic_adapter *adapter)
2875{
2876 struct device *dev = &adapter->vdev->dev;
2877 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2878 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 2879 int i;
2880
2881 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2882 DMA_BIDIRECTIONAL);
2883 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2884 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2885
498cd8e4
JA		 2886 /* If the number of queues requested can't be allocated by the
2887 * server, the login response will return with code 1. We will need
2888 * to resend the login buffer with fewer queues requested.
2889 */
2890 if (login_rsp_crq->generic.rc.code) {
2891 adapter->renegotiate = true;
2892 complete(&adapter->init_done);
2893 return 0;
2894 }
2895
032c5e82
TF		 2896 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2897 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2898 netdev_dbg(adapter->netdev, "%016lx\n",
2899 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2900 }
2901
2902 /* Sanity checks */
2903 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2904 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2905 adapter->req_rx_add_queues !=
2906 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2907 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2908 ibmvnic_remove(adapter->vdev);
2909 return -EIO;
2910 }
2911 complete(&adapter->init_done);
2912
032c5e82
TF		 2913 return 0;
2914}
2915
2916static void handle_request_map_rsp(union ibmvnic_crq *crq,
2917 struct ibmvnic_adapter *adapter)
2918{
2919 struct device *dev = &adapter->vdev->dev;
2920 u8 map_id = crq->request_map_rsp.map_id;
2921 int tx_subcrqs;
2922 int rx_subcrqs;
2923 long rc;
2924 int i;
2925
2926 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2927 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2928
2929 rc = crq->request_map_rsp.rc.code;
2930 if (rc) {
2931 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2932 adapter->map_id--;
2933 /* need to find and zero tx/rx_pool map_id */
2934 for (i = 0; i < tx_subcrqs; i++) {
2935 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2936 adapter->tx_pool[i].long_term_buff.map_id = 0;
2937 }
2938 for (i = 0; i < rx_subcrqs; i++) {
2939 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2940 adapter->rx_pool[i].long_term_buff.map_id = 0;
2941 }
2942 }
2943 complete(&adapter->fw_done);
2944}
2945
2946static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2947 struct ibmvnic_adapter *adapter)
2948{
2949 struct device *dev = &adapter->vdev->dev;
2950 long rc;
2951
2952 rc = crq->request_unmap_rsp.rc.code;
2953 if (rc)
2954 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2955}
2956
2957static void handle_query_map_rsp(union ibmvnic_crq *crq,
2958 struct ibmvnic_adapter *adapter)
2959{
2960 struct net_device *netdev = adapter->netdev;
2961 struct device *dev = &adapter->vdev->dev;
2962 long rc;
2963
2964 rc = crq->query_map_rsp.rc.code;
2965 if (rc) {
2966 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2967 return;
2968 }
2969 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2970 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2971 crq->query_map_rsp.free_pages);
2972}
2973
2974static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2975 struct ibmvnic_adapter *adapter)
2976{
2977 struct net_device *netdev = adapter->netdev;
2978 struct device *dev = &adapter->vdev->dev;
2979 long rc;
2980
901e040a 2981 atomic_dec(&adapter->running_cap_crqs);
032c5e82 2982 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 2983 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 2984 rc = crq->query_capability.rc.code;
2985 if (rc) {
2986 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2987 goto out;
2988 }
2989
2990 switch (be16_to_cpu(crq->query_capability.capability)) {
2991 case MIN_TX_QUEUES:
2992 adapter->min_tx_queues =
de89e854 2993 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2994 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2995 adapter->min_tx_queues);
2996 break;
2997 case MIN_RX_QUEUES:
2998 adapter->min_rx_queues =
de89e854 2999 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3000 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3001 adapter->min_rx_queues);
3002 break;
3003 case MIN_RX_ADD_QUEUES:
3004 adapter->min_rx_add_queues =
de89e854 3005 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3006 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3007 adapter->min_rx_add_queues);
3008 break;
3009 case MAX_TX_QUEUES:
3010 adapter->max_tx_queues =
de89e854 3011 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3012 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3013 adapter->max_tx_queues);
3014 break;
3015 case MAX_RX_QUEUES:
3016 adapter->max_rx_queues =
de89e854 3017 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3018 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3019 adapter->max_rx_queues);
3020 break;
3021 case MAX_RX_ADD_QUEUES:
3022 adapter->max_rx_add_queues =
de89e854 3023 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3024 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3025 adapter->max_rx_add_queues);
3026 break;
3027 case MIN_TX_ENTRIES_PER_SUBCRQ:
3028 adapter->min_tx_entries_per_subcrq =
de89e854 3029 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3030 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3031 adapter->min_tx_entries_per_subcrq);
3032 break;
3033 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3034 adapter->min_rx_add_entries_per_subcrq =
de89e854 3035 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3036 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3037 adapter->min_rx_add_entries_per_subcrq);
3038 break;
3039 case MAX_TX_ENTRIES_PER_SUBCRQ:
3040 adapter->max_tx_entries_per_subcrq =
de89e854 3041 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3042 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3043 adapter->max_tx_entries_per_subcrq);
3044 break;
3045 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3046 adapter->max_rx_add_entries_per_subcrq =
de89e854 3047 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3048 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3049 adapter->max_rx_add_entries_per_subcrq);
3050 break;
3051 case TCP_IP_OFFLOAD:
3052 adapter->tcp_ip_offload =
de89e854 3053 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3054 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3055 adapter->tcp_ip_offload);
3056 break;
3057 case PROMISC_SUPPORTED:
3058 adapter->promisc_supported =
de89e854 3059 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3060 netdev_dbg(netdev, "promisc_supported = %lld\n",
3061 adapter->promisc_supported);
3062 break;
3063 case MIN_MTU:
de89e854 3064 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3065 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3066 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3067 break;
3068 case MAX_MTU:
de89e854 3069 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3070 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3071 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3072 break;
3073 case MAX_MULTICAST_FILTERS:
3074 adapter->max_multicast_filters =
de89e854 3075 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3076 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3077 adapter->max_multicast_filters);
3078 break;
3079 case VLAN_HEADER_INSERTION:
3080 adapter->vlan_header_insertion =
de89e854 3081 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3082 if (adapter->vlan_header_insertion)
3083 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3084 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3085 adapter->vlan_header_insertion);
3086 break;
6052d5e2
MFV		 3087 case RX_VLAN_HEADER_INSERTION:
3088 adapter->rx_vlan_header_insertion =
3089 be64_to_cpu(crq->query_capability.number);
3090 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3091 adapter->rx_vlan_header_insertion);
3092 break;
032c5e82
TF		 3093 case MAX_TX_SG_ENTRIES:
3094 adapter->max_tx_sg_entries =
de89e854 3095 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3096 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3097 adapter->max_tx_sg_entries);
3098 break;
3099 case RX_SG_SUPPORTED:
3100 adapter->rx_sg_supported =
de89e854 3101 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3102 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3103 adapter->rx_sg_supported);
3104 break;
3105 case OPT_TX_COMP_SUB_QUEUES:
3106 adapter->opt_tx_comp_sub_queues =
de89e854 3107 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3108 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3109 adapter->opt_tx_comp_sub_queues);
3110 break;
3111 case OPT_RX_COMP_QUEUES:
3112 adapter->opt_rx_comp_queues =
de89e854 3113 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3114 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3115 adapter->opt_rx_comp_queues);
3116 break;
3117 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3118 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3119 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3120 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3121 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3122 break;
3123 case OPT_TX_ENTRIES_PER_SUBCRQ:
3124 adapter->opt_tx_entries_per_subcrq =
de89e854 3125 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3126 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3127 adapter->opt_tx_entries_per_subcrq);
3128 break;
3129 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3130 adapter->opt_rxba_entries_per_subcrq =
de89e854 3131 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3132 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3133 adapter->opt_rxba_entries_per_subcrq);
3134 break;
3135 case TX_RX_DESC_REQ:
3136 adapter->tx_rx_desc_req = crq->query_capability.number;
3137 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3138 adapter->tx_rx_desc_req);
3139 break;
3140
3141 default:
3142 netdev_err(netdev, "Got invalid cap rsp %d\n",
3143 crq->query_capability.capability);
3144 }
3145
3146out:
249168ad
TF		 3147 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3148 adapter->wait_capability = false;
d346b9bc 3149 ibmvnic_send_req_caps(adapter, 0);
249168ad 3150 }
032c5e82
TF		 3151}
3152
032c5e82
TF		 3153static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3154 struct ibmvnic_adapter *adapter)
3155{
3156 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3157 struct net_device *netdev = adapter->netdev;
3158 struct device *dev = &adapter->vdev->dev;
993a82b0 3159 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3160 long rc;
3161
3162 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3163 (unsigned long int)cpu_to_be64(u64_crq[0]),
3164 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3165 switch (gen_crq->first) {
3166 case IBMVNIC_CRQ_INIT_RSP:
3167 switch (gen_crq->cmd) {
3168 case IBMVNIC_CRQ_INIT:
3169 dev_info(dev, "Partner initialized\n");
032c5e82
TF		 3170 break;
3171 case IBMVNIC_CRQ_INIT_COMPLETE:
3172 dev_info(dev, "Partner initialization complete\n");
3173 send_version_xchg(adapter);
3174 break;
3175 default:
3176 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3177 }
3178 return;
3179 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3180 netif_carrier_off(netdev);
032c5e82 3181 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3182 dev_info(dev, "Migrated, re-enabling adapter\n");
3183 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3184 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3185 dev_info(dev, "Backing device failover detected\n");
ed651a10 3186 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3187 } else {
3188 /* The adapter lost the connection */
3189 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3190 gen_crq->cmd);
ed651a10 3191 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3192 }
3193 return;
3194 case IBMVNIC_CRQ_CMD_RSP:
3195 break;
3196 default:
3197 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3198 gen_crq->first);
3199 return;
3200 }
3201
3202 switch (gen_crq->cmd) {
3203 case VERSION_EXCHANGE_RSP:
3204 rc = crq->version_exchange_rsp.rc.code;
3205 if (rc) {
3206 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3207 break;
3208 }
3209 dev_info(dev, "Partner protocol version is %d\n",
3210 crq->version_exchange_rsp.version);
3211 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3212 ibmvnic_version)
3213 ibmvnic_version =
3214 be16_to_cpu(crq->version_exchange_rsp.version);
3215 send_cap_queries(adapter);
3216 break;
3217 case QUERY_CAPABILITY_RSP:
3218 handle_query_cap_rsp(crq, adapter);
3219 break;
3220 case QUERY_MAP_RSP:
3221 handle_query_map_rsp(crq, adapter);
3222 break;
3223 case REQUEST_MAP_RSP:
3224 handle_request_map_rsp(crq, adapter);
3225 break;
3226 case REQUEST_UNMAP_RSP:
3227 handle_request_unmap_rsp(crq, adapter);
3228 break;
3229 case REQUEST_CAPABILITY_RSP:
3230 handle_request_cap_rsp(crq, adapter);
3231 break;
3232 case LOGIN_RSP:
3233 netdev_dbg(netdev, "Got Login Response\n");
3234 handle_login_rsp(crq, adapter);
3235 break;
3236 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3237 netdev_dbg(netdev,
3238 "Got Logical Link State Response, state: %d rc: %d\n",
3239 crq->logical_link_state_rsp.link_state,
3240 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3241 adapter->logical_link_state =
3242 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3243 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3244 complete(&adapter->init_done);
032c5e82
TF		 3245 break;
3246 case LINK_STATE_INDICATION:
3247 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3248 adapter->phys_link_state =
3249 crq->link_state_indication.phys_link_state;
3250 adapter->logical_link_state =
3251 crq->link_state_indication.logical_link_state;
3252 break;
3253 case CHANGE_MAC_ADDR_RSP:
3254 netdev_dbg(netdev, "Got MAC address change Response\n");
3255 handle_change_mac_rsp(crq, adapter);
3256 break;
3257 case ERROR_INDICATION:
3258 netdev_dbg(netdev, "Got Error Indication\n");
3259 handle_error_indication(crq, adapter);
3260 break;
3261 case REQUEST_ERROR_RSP:
3262 netdev_dbg(netdev, "Got Error Detail Response\n");
3263 handle_error_info_rsp(crq, adapter);
3264 break;
3265 case REQUEST_STATISTICS_RSP:
3266 netdev_dbg(netdev, "Got Statistics Response\n");
3267 complete(&adapter->stats_done);
3268 break;
032c5e82
TF		 3269 case QUERY_IP_OFFLOAD_RSP:
3270 netdev_dbg(netdev, "Got Query IP offload Response\n");
3271 handle_query_ip_offload_rsp(adapter);
3272 break;
3273 case MULTICAST_CTRL_RSP:
3274 netdev_dbg(netdev, "Got multicast control Response\n");
3275 break;
3276 case CONTROL_IP_OFFLOAD_RSP:
3277 netdev_dbg(netdev, "Got Control IP offload Response\n");
3278 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3279 sizeof(adapter->ip_offload_ctrl),
3280 DMA_TO_DEVICE);
bd0b6723 3281 complete(&adapter->init_done);
032c5e82 3282 break;
032c5e82
TF		 3283 case COLLECT_FW_TRACE_RSP:
3284 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3285 complete(&adapter->fw_done);
3286 break;
3287 default:
3288 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3289 gen_crq->cmd);
3290 }
3291}
3292
3293static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3294{
3295 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3296
6c267b3d 3297 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3298 return IRQ_HANDLED;
3299}
3300
3301static void ibmvnic_tasklet(void *data)
3302{
3303 struct ibmvnic_adapter *adapter = data;
032c5e82 3304 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3305 union ibmvnic_crq *crq;
3306 unsigned long flags;
3307 bool done = false;
3308
3309 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3310 while (!done) {
3311 /* Pull all the valid messages off the CRQ */
3312 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3313 ibmvnic_handle_crq(crq, adapter);
3314 crq->generic.first = 0;
3315 }
ed7ecbf7
BK		 3316
3317 /* remain in tasklet until all
3318 * capabilities responses are received
3319 */
3320 if (!adapter->wait_capability)
3321 done = true;
032c5e82 3322 }
249168ad
TF		 3323 /* if capabilities CRQ's were sent in this tasklet, the following
3324 * tasklet must wait until all responses are received
3325 */
3326 if (atomic_read(&adapter->running_cap_crqs) != 0)
3327 adapter->wait_capability = true;
032c5e82 3328 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3329}
3330
3331static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3332{
3333 struct vio_dev *vdev = adapter->vdev;
3334 int rc;
3335
3336 do {
3337 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3338 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3339
3340 if (rc)
3341 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3342
3343 return rc;
3344}
3345
3346static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3347{
3348 struct ibmvnic_crq_queue *crq = &adapter->crq;
3349 struct device *dev = &adapter->vdev->dev;
3350 struct vio_dev *vdev = adapter->vdev;
3351 int rc;
3352
3353 /* Close the CRQ */
3354 do {
3355 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3356 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3357
3358 /* Clean out the queue */
3359 memset(crq->msgs, 0, PAGE_SIZE);
3360 crq->cur = 0;
3361
3362 /* And re-open it again */
3363 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3364 crq->msg_token, PAGE_SIZE);
3365
3366 if (rc == H_CLOSED)
3367 /* Adapter is good, but other end is not ready */
3368 dev_warn(dev, "Partner adapter not ready\n");
3369 else if (rc != 0)
3370 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3371
3372 return rc;
3373}
3374
f992887c 3375static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3376{
3377 struct ibmvnic_crq_queue *crq = &adapter->crq;
3378 struct vio_dev *vdev = adapter->vdev;
3379 long rc;
3380
f992887c
NF		 3381 if (!crq->msgs)
3382 return;
3383
032c5e82
TF		 3384 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3385 free_irq(vdev->irq, adapter);
6c267b3d 3386 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3387 do {
3388 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3389 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3390
3391 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3392 DMA_BIDIRECTIONAL);
3393 free_page((unsigned long)crq->msgs);
f992887c 3394 crq->msgs = NULL;
032c5e82
TF		 3395}
3396
f992887c 3397static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3398{
3399 struct ibmvnic_crq_queue *crq = &adapter->crq;
3400 struct device *dev = &adapter->vdev->dev;
3401 struct vio_dev *vdev = adapter->vdev;
3402 int rc, retrc = -ENOMEM;
3403
f992887c
NF		 3404 if (crq->msgs)
3405 return 0;
3406
032c5e82
TF		 3407 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3408 /* Should we allocate more than one page? */
3409
3410 if (!crq->msgs)
3411 return -ENOMEM;
3412
3413 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3414 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3415 DMA_BIDIRECTIONAL);
3416 if (dma_mapping_error(dev, crq->msg_token))
3417 goto map_failed;
3418
3419 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3420 crq->msg_token, PAGE_SIZE);
3421
3422 if (rc == H_RESOURCE)
3423 /* maybe kexecing and resource is busy. try a reset */
3424 rc = ibmvnic_reset_crq(adapter);
3425 retrc = rc;
3426
3427 if (rc == H_CLOSED) {
3428 dev_warn(dev, "Partner adapter not ready\n");
3429 } else if (rc) {
3430 dev_warn(dev, "Error %d opening adapter\n", rc);
3431 goto reg_crq_failed;
3432 }
3433
3434 retrc = 0;
3435
6c267b3d
TF		 3436 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3437 (unsigned long)adapter);
3438
032c5e82
TF		 3439 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3440 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3441 adapter);
3442 if (rc) {
3443 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3444 vdev->irq, rc);
3445 goto req_irq_failed;
3446 }
3447
3448 rc = vio_enable_interrupts(vdev);
3449 if (rc) {
3450 dev_err(dev, "Error %d enabling interrupts\n", rc);
3451 goto req_irq_failed;
3452 }
3453
3454 crq->cur = 0;
3455 spin_lock_init(&crq->lock);
3456
3457 return retrc;
3458
3459req_irq_failed:
6c267b3d 3460 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3461 do {
3462 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3463 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3464reg_crq_failed:
3465 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3466map_failed:
3467 free_page((unsigned long)crq->msgs);
f992887c 3468 crq->msgs = NULL;
032c5e82
TF		 3469 return retrc;
3470}
3471
f6ef6408 3472static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3473{
f6ef6408 3474 struct device *dev = &adapter->vdev->dev;
ea22d51a 3475 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3476 int rc;
3477
f992887c 3478 rc = init_crq_queue(adapter);
f6ef6408
JA		 3479 if (rc) {
3480 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3481 return rc;
3482 }
3483
f6ef6408
JA		 3484 init_completion(&adapter->init_done);
3485 ibmvnic_send_crq_init(adapter);
3486 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3487 dev_err(dev, "Initialization sequence timed out\n");
f992887c 3488 release_crq_queue(adapter);
f6ef6408
JA		 3489 return -1;
3490 }
3491
1bb3c739
NF		 3492 rc = init_sub_crqs(adapter);
3493 if (rc) {
3494 dev_err(dev, "Initialization of sub crqs failed\n");
3495 release_crq_queue(adapter);
3496 }
3497
3498 return rc;
f6ef6408
JA		 3499}
3500
3501static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3502{
032c5e82
TF		 3503 struct ibmvnic_adapter *adapter;
3504 struct net_device *netdev;
3505 unsigned char *mac_addr_p;
032c5e82
TF		 3506 int rc;
3507
3508 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3509 dev->unit_address);
3510
3511 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3512 VETH_MAC_ADDR, NULL);
3513 if (!mac_addr_p) {
3514 dev_err(&dev->dev,
3515 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3516 __FILE__, __LINE__);
3517 return 0;
3518 }
3519
3520 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3521 IBMVNIC_MAX_TX_QUEUES);
3522 if (!netdev)
3523 return -ENOMEM;
3524
3525 adapter = netdev_priv(netdev);
90c8014c 3526 adapter->state = VNIC_PROBING;
032c5e82
TF		 3527 dev_set_drvdata(&dev->dev, netdev);
3528 adapter->vdev = dev;
3529 adapter->netdev = netdev;
3530
3531 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3532 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3533 netdev->irq = dev->irq;
3534 netdev->netdev_ops = &ibmvnic_netdev_ops;
3535 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3536 SET_NETDEV_DEV(netdev, &dev->dev);
3537
3538 spin_lock_init(&adapter->stats_lock);
3539
032c5e82 3540 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3541 spin_lock_init(&adapter->error_list_lock);
032c5e82 3542
ed651a10
NF		 3543 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3544 INIT_LIST_HEAD(&adapter->rwi_list);
3545 mutex_init(&adapter->reset_lock);
3546 mutex_init(&adapter->rwi_lock);
3547 adapter->resetting = false;
3548
f6ef6408
JA		 3549 rc = ibmvnic_init(adapter);
3550 if (rc) {
3551 free_netdev(netdev);
3552 return rc;
032c5e82 3553 }
032c5e82 3554
f39f0d1e 3555 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82
TF		 3556
3557 rc = register_netdev(netdev);
3558 if (rc) {
3559 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3560 free_netdev(netdev);
3561 return rc;
032c5e82
TF		 3562 }
3563 dev_info(&dev->dev, "ibmvnic registered\n");
3564
90c8014c 3565 adapter->state = VNIC_PROBED;
032c5e82 3566 return 0;
032c5e82
TF		 3567}
3568
3569static int ibmvnic_remove(struct vio_dev *dev)
3570{
3571 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3572 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3573
90c8014c 3574 adapter->state = VNIC_REMOVING;
032c5e82 3575 unregister_netdev(netdev);
ed651a10 3576 mutex_lock(&adapter->reset_lock);
37489055
NF		 3577
3578 release_resources(adapter);
3579 release_sub_crqs(adapter);
3580 release_crq_queue(adapter);
3581
90c8014c
NF		 3582 adapter->state = VNIC_REMOVED;
3583
ed651a10 3584 mutex_unlock(&adapter->reset_lock);
032c5e82
TF		 3585 free_netdev(netdev);
3586 dev_set_drvdata(&dev->dev, NULL);
3587
3588 return 0;
3589}
3590
3591static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3592{
3593 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3594 struct ibmvnic_adapter *adapter;
3595 struct iommu_table *tbl;
3596 unsigned long ret = 0;
3597 int i;
3598
3599 tbl = get_iommu_table_base(&vdev->dev);
3600
3601 /* netdev inits at probe time along with the structures we need below*/
3602 if (!netdev)
3603 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3604
3605 adapter = netdev_priv(netdev);
3606
3607 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3608 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3609
3610 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3611 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3612
3613 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3614 i++)
3615 ret += adapter->rx_pool[i].size *
3616 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3617
3618 return ret;
3619}
3620
3621static int ibmvnic_resume(struct device *dev)
3622{
3623 struct net_device *netdev = dev_get_drvdata(dev);
3624 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3625 int i;
3626
3627 /* kick the interrupt handlers just in case we lost an interrupt */
3628 for (i = 0; i < adapter->req_rx_queues; i++)
3629 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3630 adapter->rx_scrq[i]);
3631
3632 return 0;
3633}
3634
3635static struct vio_device_id ibmvnic_device_table[] = {
3636 {"network", "IBM,vnic"},
3637 {"", "" }
3638};
3639MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3640
3641static const struct dev_pm_ops ibmvnic_pm_ops = {
3642 .resume = ibmvnic_resume
3643};
3644
3645static struct vio_driver ibmvnic_driver = {
3646 .id_table = ibmvnic_device_table,
3647 .probe = ibmvnic_probe,
3648 .remove = ibmvnic_remove,
3649 .get_desired_dma = ibmvnic_get_desired_dma,
3650 .name = ibmvnic_driver_name,
3651 .pm = &ibmvnic_pm_ops,
3652};
3653
3654/* module functions */
3655static int __init ibmvnic_module_init(void)
3656{
3657 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3658 IBMVNIC_DRIVER_VERSION);
3659
3660 return vio_register_driver(&ibmvnic_driver);
3661}
3662
3663static void __exit ibmvnic_module_exit(void)
3664{
3665 vio_unregister_driver(&ibmvnic_driver);
3666}
3667
3668module_init(ibmvnic_module_init);
3669module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)