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ibmvnic: Halt TX and report carrier off on H_CLOSED return code
[mirror_ubuntu-artful-kernel.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
808 if (adapter->tx_scrq) {
809 for (i = 0; i < adapter->req_tx_queues; i++)
810 if (adapter->tx_scrq[i]->irq)
811 disable_irq(adapter->tx_scrq[i]->irq);
812 }
813
53da09e9 814 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 815 if (rc)
816 return rc;
817
818 if (adapter->rx_scrq) {
819 for (i = 0; i < adapter->req_rx_queues; i++) {
820 int retries = 10;
821
822 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
823 retries--;
824 mdelay(100);
825
826 if (retries == 0)
827 break;
828 }
829
830 if (adapter->rx_scrq[i]->irq)
831 disable_irq(adapter->rx_scrq[i]->irq);
832 }
833 }
ea5509f5 834
10f76215 835 clean_tx_pools(adapter);
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
b8c80b84
TF		 1114 if (lpar_rc == H_CLOSED) {
1115 /* Disable TX and report carrier off if queue is closed.
1116 * Firmware guarantees that a signal will be sent to the
1117 * driver, triggering a reset or some other action.
1118 */
1119 netif_tx_stop_all_queues(netdev);
1120 netif_carrier_off(netdev);
1121 }
7f5b0308 1122
032c5e82
TF		 1123 tx_send_failed++;
1124 tx_dropped++;
7f5b0308 1125 ret = NETDEV_TX_OK;
032c5e82
TF		 1126 goto out;
1127 }
142c0ac4 1128
58c8c0c0
BK		 1129 if (atomic_inc_return(&tx_scrq->used)
1130 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1131 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1132 netif_stop_subqueue(netdev, queue_num);
1133 }
1134
032c5e82
TF		 1135 tx_packets++;
1136 tx_bytes += skb->len;
1137 txq->trans_start = jiffies;
1138 ret = NETDEV_TX_OK;
1139
1140out:
1141 netdev->stats.tx_dropped += tx_dropped;
1142 netdev->stats.tx_bytes += tx_bytes;
1143 netdev->stats.tx_packets += tx_packets;
1144 adapter->tx_send_failed += tx_send_failed;
1145 adapter->tx_map_failed += tx_map_failed;
1146
1147 return ret;
1148}
1149
1150static void ibmvnic_set_multi(struct net_device *netdev)
1151{
1152 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1153 struct netdev_hw_addr *ha;
1154 union ibmvnic_crq crq;
1155
1156 memset(&crq, 0, sizeof(crq));
1157 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1158 crq.request_capability.cmd = REQUEST_CAPABILITY;
1159
1160 if (netdev->flags & IFF_PROMISC) {
1161 if (!adapter->promisc_supported)
1162 return;
1163 } else {
1164 if (netdev->flags & IFF_ALLMULTI) {
1165 /* Accept all multicast */
1166 memset(&crq, 0, sizeof(crq));
1167 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1168 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1169 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1170 ibmvnic_send_crq(adapter, &crq);
1171 } else if (netdev_mc_empty(netdev)) {
1172 /* Reject all multicast */
1173 memset(&crq, 0, sizeof(crq));
1174 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1175 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1176 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1177 ibmvnic_send_crq(adapter, &crq);
1178 } else {
1179 /* Accept one or more multicast(s) */
1180 netdev_for_each_mc_addr(ha, netdev) {
1181 memset(&crq, 0, sizeof(crq));
1182 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1183 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1184 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1185 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1186 ha->addr);
1187 ibmvnic_send_crq(adapter, &crq);
1188 }
1189 }
1190 }
1191}
1192
1193static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1194{
1195 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1196 struct sockaddr *addr = p;
1197 union ibmvnic_crq crq;
1198
1199 if (!is_valid_ether_addr(addr->sa_data))
1200 return -EADDRNOTAVAIL;
1201
1202 memset(&crq, 0, sizeof(crq));
1203 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1204 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1205 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1206 ibmvnic_send_crq(adapter, &crq);
1207 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1208 return 0;
1209}
1210
ed651a10
NF		 1211/**
1212 * do_reset returns zero if we are able to keep processing reset events, or
1213 * non-zero if we hit a fatal error and must halt.
1214 */
1215static int do_reset(struct ibmvnic_adapter *adapter,
1216 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1217{
ed651a10
NF		 1218 struct net_device *netdev = adapter->netdev;
1219 int i, rc;
1220
1221 netif_carrier_off(netdev);
1222 adapter->reset_reason = rwi->reset_reason;
1223
1224 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1225 rc = ibmvnic_reenable_crq_queue(adapter);
1226 if (rc)
1227 return 0;
1228 }
1229
1230 rc = __ibmvnic_close(netdev);
1231 if (rc)
1232 return rc;
1233
8cb31cfc
JA		 1234 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1235 /* remove the closed state so when we call open it appears
1236 * we are coming from the probed state.
1237 */
1238 adapter->state = VNIC_PROBED;
032c5e82 1239
8cb31cfc
JA		 1240 release_resources(adapter);
1241 release_sub_crqs(adapter);
1242 release_crq_queue(adapter);
ed651a10 1243
8cb31cfc
JA		 1244 rc = ibmvnic_init(adapter);
1245 if (rc)
1246 return 0;
ed651a10 1247
8cb31cfc
JA		 1248 /* If the adapter was in PROBE state prior to the reset,
1249 * exit here.
1250 */
1251 if (reset_state == VNIC_PROBED)
1252 return 0;
ed651a10 1253
8cb31cfc
JA		 1254 rc = ibmvnic_login(netdev);
1255 if (rc) {
1256 adapter->state = VNIC_PROBED;
1257 return 0;
1258 }
ed651a10 1259
8cb31cfc
JA		 1260 rtnl_lock();
1261 rc = init_resources(adapter);
1262 rtnl_unlock();
1263 if (rc)
1264 return rc;
ed651a10 1265
8cb31cfc
JA		 1266 if (reset_state == VNIC_CLOSED)
1267 return 0;
1268 }
ed651a10
NF		 1269
1270 rc = __ibmvnic_open(netdev);
1271 if (rc) {
1272 if (list_empty(&adapter->rwi_list))
1273 adapter->state = VNIC_CLOSED;
1274 else
1275 adapter->state = reset_state;
1276
1277 return 0;
1278 }
1279
1280 netif_carrier_on(netdev);
1281
1282 /* kick napi */
1283 for (i = 0; i < adapter->req_rx_queues; i++)
1284 napi_schedule(&adapter->napi[i]);
1285
2ce9e4ef 1286 netdev_notify_peers(netdev);
ed651a10
NF		 1287 return 0;
1288}
1289
1290static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1291{
1292 struct ibmvnic_rwi *rwi;
1293
1294 mutex_lock(&adapter->rwi_lock);
1295
1296 if (!list_empty(&adapter->rwi_list)) {
1297 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1298 list);
1299 list_del(&rwi->list);
1300 } else {
1301 rwi = NULL;
1302 }
1303
1304 mutex_unlock(&adapter->rwi_lock);
1305 return rwi;
1306}
1307
1308static void free_all_rwi(struct ibmvnic_adapter *adapter)
1309{
1310 struct ibmvnic_rwi *rwi;
1311
1312 rwi = get_next_rwi(adapter);
1313 while (rwi) {
1314 kfree(rwi);
1315 rwi = get_next_rwi(adapter);
1316 }
1317}
1318
1319static void __ibmvnic_reset(struct work_struct *work)
1320{
1321 struct ibmvnic_rwi *rwi;
1322 struct ibmvnic_adapter *adapter;
1323 struct net_device *netdev;
1324 u32 reset_state;
1325 int rc;
1326
1327 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1328 netdev = adapter->netdev;
1329
1330 mutex_lock(&adapter->reset_lock);
1331 adapter->resetting = true;
1332 reset_state = adapter->state;
1333
1334 rwi = get_next_rwi(adapter);
1335 while (rwi) {
1336 rc = do_reset(adapter, rwi, reset_state);
1337 kfree(rwi);
1338 if (rc)
1339 break;
1340
1341 rwi = get_next_rwi(adapter);
1342 }
1343
1344 if (rc) {
1345 free_all_rwi(adapter);
6d0af07d 1346 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1347 return;
1348 }
1349
1350 adapter->resetting = false;
1351 mutex_unlock(&adapter->reset_lock);
1352}
1353
1354static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1355 enum ibmvnic_reset_reason reason)
1356{
1357 struct ibmvnic_rwi *rwi, *tmp;
1358 struct net_device *netdev = adapter->netdev;
1359 struct list_head *entry;
1360
1361 if (adapter->state == VNIC_REMOVING ||
1362 adapter->state == VNIC_REMOVED) {
1363 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1364 return;
1365 }
1366
1367 mutex_lock(&adapter->rwi_lock);
1368
1369 list_for_each(entry, &adapter->rwi_list) {
1370 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1371 if (tmp->reset_reason == reason) {
1372 netdev_err(netdev, "Matching reset found, skipping\n");
1373 mutex_unlock(&adapter->rwi_lock);
1374 return;
1375 }
1376 }
1377
1378 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1379 if (!rwi) {
1380 mutex_unlock(&adapter->rwi_lock);
1381 ibmvnic_close(netdev);
1382 return;
1383 }
1384
1385 rwi->reset_reason = reason;
1386 list_add_tail(&rwi->list, &adapter->rwi_list);
1387 mutex_unlock(&adapter->rwi_lock);
1388 schedule_work(&adapter->ibmvnic_reset);
1389}
1390
1391static void ibmvnic_tx_timeout(struct net_device *dev)
1392{
1393 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1394
1395 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1396}
1397
1398static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1399 struct ibmvnic_rx_buff *rx_buff)
1400{
1401 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1402
1403 rx_buff->skb = NULL;
1404
1405 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1406 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1407
1408 atomic_dec(&pool->available);
1409}
1410
1411static int ibmvnic_poll(struct napi_struct *napi, int budget)
1412{
1413 struct net_device *netdev = napi->dev;
1414 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1415 int scrq_num = (int)(napi - adapter->napi);
1416 int frames_processed = 0;
1417restart_poll:
1418 while (frames_processed < budget) {
1419 struct sk_buff *skb;
1420 struct ibmvnic_rx_buff *rx_buff;
1421 union sub_crq *next;
1422 u32 length;
1423 u16 offset;
1424 u8 flags = 0;
1425
1426 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1427 break;
1428 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1429 rx_buff =
1430 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1431 rx_comp.correlator);
1432 /* do error checking */
1433 if (next->rx_comp.rc) {
1434 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1435 /* free the entry */
1436 next->rx_comp.first = 0;
1437 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1438 continue;
032c5e82
TF		 1439 }
1440
1441 length = be32_to_cpu(next->rx_comp.len);
1442 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1443 flags = next->rx_comp.flags;
1444 skb = rx_buff->skb;
1445 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1446 length);
6052d5e2
MFV		 1447
1448 /* VLAN Header has been stripped by the system firmware and
1449 * needs to be inserted by the driver
1450 */
1451 if (adapter->rx_vlan_header_insertion &&
1452 (flags & IBMVNIC_VLAN_STRIPPED))
1453 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1454 ntohs(next->rx_comp.vlan_tci));
1455
032c5e82
TF		 1456 /* free the entry */
1457 next->rx_comp.first = 0;
1458 remove_buff_from_pool(adapter, rx_buff);
1459
1460 skb_put(skb, length);
1461 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1462 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1463
1464 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1465 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1466 skb->ip_summed = CHECKSUM_UNNECESSARY;
1467 }
1468
1469 length = skb->len;
1470 napi_gro_receive(napi, skb); /* send it up */
1471 netdev->stats.rx_packets++;
1472 netdev->stats.rx_bytes += length;
1473 frames_processed++;
1474 }
498cd8e4 1475 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1476
1477 if (frames_processed < budget) {
1478 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1479 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1480 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1481 napi_reschedule(napi)) {
1482 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1483 goto restart_poll;
1484 }
1485 }
1486 return frames_processed;
1487}
1488
1489#ifdef CONFIG_NET_POLL_CONTROLLER
1490static void ibmvnic_netpoll_controller(struct net_device *dev)
1491{
1492 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1493 int i;
1494
1495 replenish_pools(netdev_priv(dev));
1496 for (i = 0; i < adapter->req_rx_queues; i++)
1497 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1498 adapter->rx_scrq[i]);
1499}
1500#endif
1501
1502static const struct net_device_ops ibmvnic_netdev_ops = {
1503 .ndo_open = ibmvnic_open,
1504 .ndo_stop = ibmvnic_close,
1505 .ndo_start_xmit = ibmvnic_xmit,
1506 .ndo_set_rx_mode = ibmvnic_set_multi,
1507 .ndo_set_mac_address = ibmvnic_set_mac,
1508 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1509 .ndo_tx_timeout = ibmvnic_tx_timeout,
1510#ifdef CONFIG_NET_POLL_CONTROLLER
1511 .ndo_poll_controller = ibmvnic_netpoll_controller,
1512#endif
1513};
1514
1515/* ethtool functions */
1516
8a43379f
PR		 1517static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1518 struct ethtool_link_ksettings *cmd)
032c5e82 1519{
8a43379f
PR		 1520 u32 supported, advertising;
1521
1522 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1523 SUPPORTED_FIBRE);
8a43379f 1524 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1525 ADVERTISED_FIBRE);
8a43379f
PR		 1526 cmd->base.speed = SPEED_1000;
1527 cmd->base.duplex = DUPLEX_FULL;
1528 cmd->base.port = PORT_FIBRE;
1529 cmd->base.phy_address = 0;
1530 cmd->base.autoneg = AUTONEG_ENABLE;
1531
1532 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1533 supported);
1534 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1535 advertising);
1536
032c5e82
TF		 1537 return 0;
1538}
1539
1540static void ibmvnic_get_drvinfo(struct net_device *dev,
1541 struct ethtool_drvinfo *info)
1542{
1543 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1544 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1545}
1546
1547static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1548{
1549 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1550
1551 return adapter->msg_enable;
1552}
1553
1554static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1555{
1556 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1557
1558 adapter->msg_enable = data;
1559}
1560
1561static u32 ibmvnic_get_link(struct net_device *netdev)
1562{
1563 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1564
1565 /* Don't need to send a query because we request a logical link up at
1566 * init and then we wait for link state indications
1567 */
1568 return adapter->logical_link_state;
1569}
1570
1571static void ibmvnic_get_ringparam(struct net_device *netdev,
1572 struct ethtool_ringparam *ring)
1573{
1574 ring->rx_max_pending = 0;
1575 ring->tx_max_pending = 0;
1576 ring->rx_mini_max_pending = 0;
1577 ring->rx_jumbo_max_pending = 0;
1578 ring->rx_pending = 0;
1579 ring->tx_pending = 0;
1580 ring->rx_mini_pending = 0;
1581 ring->rx_jumbo_pending = 0;
1582}
1583
1584static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1585{
1586 int i;
1587
1588 if (stringset != ETH_SS_STATS)
1589 return;
1590
1591 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1592 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1593}
1594
1595static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1596{
1597 switch (sset) {
1598 case ETH_SS_STATS:
1599 return ARRAY_SIZE(ibmvnic_stats);
1600 default:
1601 return -EOPNOTSUPP;
1602 }
1603}
1604
1605static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1606 struct ethtool_stats *stats, u64 *data)
1607{
1608 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1609 union ibmvnic_crq crq;
1610 int i;
1611
1612 memset(&crq, 0, sizeof(crq));
1613 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1614 crq.request_statistics.cmd = REQUEST_STATISTICS;
1615 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1616 crq.request_statistics.len =
1617 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1618
1619 /* Wait for data to be written */
1620 init_completion(&adapter->stats_done);
db5d0b59 1621 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1622 wait_for_completion(&adapter->stats_done);
1623
1624 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1625 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1626}
1627
1628static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1629 .get_drvinfo = ibmvnic_get_drvinfo,
1630 .get_msglevel = ibmvnic_get_msglevel,
1631 .set_msglevel = ibmvnic_set_msglevel,
1632 .get_link = ibmvnic_get_link,
1633 .get_ringparam = ibmvnic_get_ringparam,
1634 .get_strings = ibmvnic_get_strings,
1635 .get_sset_count = ibmvnic_get_sset_count,
1636 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1637 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1638};
1639
1640/* Routines for managing CRQs/sCRQs */
1641
1642static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1643 struct ibmvnic_sub_crq_queue *scrq)
1644{
1645 struct device *dev = &adapter->vdev->dev;
1646 long rc;
1647
1648 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1649
1650 /* Close the sub-crqs */
1651 do {
1652 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1653 adapter->vdev->unit_address,
1654 scrq->crq_num);
1655 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1656
ffa73855
TF		 1657 if (rc) {
1658 netdev_err(adapter->netdev,
1659 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1660 scrq->crq_num, rc);
1661 }
1662
032c5e82
TF		 1663 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1664 DMA_BIDIRECTIONAL);
1665 free_pages((unsigned long)scrq->msgs, 2);
1666 kfree(scrq);
1667}
1668
1669static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1670 *adapter)
1671{
1672 struct device *dev = &adapter->vdev->dev;
1673 struct ibmvnic_sub_crq_queue *scrq;
1674 int rc;
1675
1bb3c739 1676 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1677 if (!scrq)
1678 return NULL;
1679
7f7adc50 1680 scrq->msgs =
1bb3c739 1681 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1682 if (!scrq->msgs) {
1683 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1684 goto zero_page_failed;
1685 }
1686
1687 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1688 DMA_BIDIRECTIONAL);
1689 if (dma_mapping_error(dev, scrq->msg_token)) {
1690 dev_warn(dev, "Couldn't map crq queue messages page\n");
1691 goto map_failed;
1692 }
1693
1694 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1695 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1696
1697 if (rc == H_RESOURCE)
1698 rc = ibmvnic_reset_crq(adapter);
1699
1700 if (rc == H_CLOSED) {
1701 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1702 } else if (rc) {
1703 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1704 goto reg_failed;
1705 }
1706
032c5e82
TF		 1707 scrq->adapter = adapter;
1708 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1709 spin_lock_init(&scrq->lock);
1710
1711 netdev_dbg(adapter->netdev,
1712 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1713 scrq->crq_num, scrq->hw_irq, scrq->irq);
1714
1715 return scrq;
1716
032c5e82
TF		 1717reg_failed:
1718 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1719 DMA_BIDIRECTIONAL);
1720map_failed:
1721 free_pages((unsigned long)scrq->msgs, 2);
1722zero_page_failed:
1723 kfree(scrq);
1724
1725 return NULL;
1726}
1727
1728static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1729{
1730 int i;
1731
1732 if (adapter->tx_scrq) {
b510888f
NF		 1733 for (i = 0; i < adapter->req_tx_queues; i++) {
1734 if (!adapter->tx_scrq[i])
1735 continue;
1736
1737 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1738 free_irq(adapter->tx_scrq[i]->irq,
1739 adapter->tx_scrq[i]);
88eb98a0 1740 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1741 adapter->tx_scrq[i]->irq = 0;
032c5e82 1742 }
b510888f
NF		 1743
1744 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1745 }
1746
9501df3c 1747 kfree(adapter->tx_scrq);
032c5e82
TF		 1748 adapter->tx_scrq = NULL;
1749 }
1750
1751 if (adapter->rx_scrq) {
b510888f
NF		 1752 for (i = 0; i < adapter->req_rx_queues; i++) {
1753 if (!adapter->rx_scrq[i])
1754 continue;
1755
1756 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1757 free_irq(adapter->rx_scrq[i]->irq,
1758 adapter->rx_scrq[i]);
88eb98a0 1759 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1760 adapter->rx_scrq[i]->irq = 0;
032c5e82 1761 }
032c5e82 1762
b510888f
NF		 1763 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1764 }
ea22d51a 1765
b510888f 1766 kfree(adapter->rx_scrq);
ea22d51a
TF		 1767 adapter->rx_scrq = NULL;
1768 }
ea22d51a
TF		 1769}
1770
032c5e82
TF		 1771static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1772 struct ibmvnic_sub_crq_queue *scrq)
1773{
1774 struct device *dev = &adapter->vdev->dev;
1775 unsigned long rc;
1776
1777 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1778 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1779 if (rc)
1780 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1781 scrq->hw_irq, rc);
1782 return rc;
1783}
1784
1785static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1786 struct ibmvnic_sub_crq_queue *scrq)
1787{
1788 struct device *dev = &adapter->vdev->dev;
1789 unsigned long rc;
1790
1791 if (scrq->hw_irq > 0x100000000ULL) {
1792 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1793 return 1;
1794 }
1795
1796 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1797 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1798 if (rc)
1799 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1800 scrq->hw_irq, rc);
1801 return rc;
1802}
1803
1804static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1805 struct ibmvnic_sub_crq_queue *scrq)
1806{
1807 struct device *dev = &adapter->vdev->dev;
1808 struct ibmvnic_tx_buff *txbuff;
1809 union sub_crq *next;
1810 int index;
1811 int i, j;
ad7775dc 1812 u8 first;
032c5e82
TF		 1813
1814restart_loop:
1815 while (pending_scrq(adapter, scrq)) {
1816 unsigned int pool = scrq->pool_index;
1817
1818 next = ibmvnic_next_scrq(adapter, scrq);
1819 for (i = 0; i < next->tx_comp.num_comps; i++) {
1820 if (next->tx_comp.rcs[i]) {
1821 dev_err(dev, "tx error %x\n",
1822 next->tx_comp.rcs[i]);
1823 continue;
1824 }
1825 index = be32_to_cpu(next->tx_comp.correlators[i]);
1826 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1827
1828 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1829 if (!txbuff->data_dma[j])
1830 continue;
1831
1832 txbuff->data_dma[j] = 0;
032c5e82 1833 }
ad7775dc
TF		 1834 /* if sub_crq was sent indirectly */
1835 first = txbuff->indir_arr[0].generic.first;
1836 if (first == IBMVNIC_CRQ_CMD) {
1837 dma_unmap_single(dev, txbuff->indir_dma,
1838 sizeof(txbuff->indir_arr),
1839 DMA_TO_DEVICE);
1840 }
032c5e82 1841
142c0ac4 1842 if (txbuff->last_frag) {
032c5e82 1843 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 1844 txbuff->skb = NULL;
142c0ac4 1845 }
032c5e82
TF		 1846
1847 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1848 producer_index] = index;
1849 adapter->tx_pool[pool].producer_index =
1850 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1851 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1852 }
1853 /* remove tx_comp scrq*/
1854 next->tx_comp.first = 0;
7c3e7de3
NF		 1855
1856 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1857 (adapter->req_tx_entries_per_subcrq / 2) &&
1858 __netif_subqueue_stopped(adapter->netdev,
1859 scrq->pool_index)) {
1860 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
1861 netdev_info(adapter->netdev, "Started queue %d\n",
1862 scrq->pool_index);
1863 }
032c5e82
TF		 1864 }
1865
1866 enable_scrq_irq(adapter, scrq);
1867
1868 if (pending_scrq(adapter, scrq)) {
1869 disable_scrq_irq(adapter, scrq);
1870 goto restart_loop;
1871 }
1872
1873 return 0;
1874}
1875
1876static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1877{
1878 struct ibmvnic_sub_crq_queue *scrq = instance;
1879 struct ibmvnic_adapter *adapter = scrq->adapter;
1880
1881 disable_scrq_irq(adapter, scrq);
1882 ibmvnic_complete_tx(adapter, scrq);
1883
1884 return IRQ_HANDLED;
1885}
1886
1887static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1888{
1889 struct ibmvnic_sub_crq_queue *scrq = instance;
1890 struct ibmvnic_adapter *adapter = scrq->adapter;
1891
1892 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1893 disable_scrq_irq(adapter, scrq);
1894 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1895 }
1896
1897 return IRQ_HANDLED;
1898}
1899
ea22d51a
TF		 1900static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1901{
1902 struct device *dev = &adapter->vdev->dev;
1903 struct ibmvnic_sub_crq_queue *scrq;
1904 int i = 0, j = 0;
1905 int rc = 0;
1906
1907 for (i = 0; i < adapter->req_tx_queues; i++) {
1908 scrq = adapter->tx_scrq[i];
1909 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1910
99c1790e 1911 if (!scrq->irq) {
ea22d51a
TF		 1912 rc = -EINVAL;
1913 dev_err(dev, "Error mapping irq\n");
1914 goto req_tx_irq_failed;
1915 }
1916
1917 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1918 0, "ibmvnic_tx", scrq);
1919
1920 if (rc) {
1921 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1922 scrq->irq, rc);
1923 irq_dispose_mapping(scrq->irq);
1924 goto req_rx_irq_failed;
1925 }
1926 }
1927
1928 for (i = 0; i < adapter->req_rx_queues; i++) {
1929 scrq = adapter->rx_scrq[i];
1930 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1931 if (!scrq->irq) {
ea22d51a
TF		 1932 rc = -EINVAL;
1933 dev_err(dev, "Error mapping irq\n");
1934 goto req_rx_irq_failed;
1935 }
1936 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1937 0, "ibmvnic_rx", scrq);
1938 if (rc) {
1939 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1940 scrq->irq, rc);
1941 irq_dispose_mapping(scrq->irq);
1942 goto req_rx_irq_failed;
1943 }
1944 }
1945 return rc;
1946
1947req_rx_irq_failed:
8bf371e6 1948 for (j = 0; j < i; j++) {
ea22d51a
TF		 1949 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1950 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1951 }
ea22d51a
TF		 1952 i = adapter->req_tx_queues;
1953req_tx_irq_failed:
8bf371e6 1954 for (j = 0; j < i; j++) {
ea22d51a
TF		 1955 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1956 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1957 }
b510888f 1958 release_sub_crqs(adapter);
ea22d51a
TF		 1959 return rc;
1960}
1961
d346b9bc 1962static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 1963{
1964 struct device *dev = &adapter->vdev->dev;
1965 struct ibmvnic_sub_crq_queue **allqueues;
1966 int registered_queues = 0;
032c5e82
TF		 1967 int total_queues;
1968 int more = 0;
ea22d51a 1969 int i;
032c5e82 1970
032c5e82
TF		 1971 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1972
1bb3c739 1973 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 1974 if (!allqueues)
d346b9bc 1975 return -1;
032c5e82
TF		 1976
1977 for (i = 0; i < total_queues; i++) {
1978 allqueues[i] = init_sub_crq_queue(adapter);
1979 if (!allqueues[i]) {
1980 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1981 break;
1982 }
1983 registered_queues++;
1984 }
1985
1986 /* Make sure we were able to register the minimum number of queues */
1987 if (registered_queues <
1988 adapter->min_tx_queues + adapter->min_rx_queues) {
1989 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1990 goto tx_failed;
1991 }
1992
1993 /* Distribute the failed allocated queues*/
1994 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1995 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1996 switch (i % 3) {
1997 case 0:
1998 if (adapter->req_rx_queues > adapter->min_rx_queues)
1999 adapter->req_rx_queues--;
2000 else
2001 more++;
2002 break;
2003 case 1:
2004 if (adapter->req_tx_queues > adapter->min_tx_queues)
2005 adapter->req_tx_queues--;
2006 else
2007 more++;
2008 break;
2009 }
2010 }
2011
2012 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2013 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2014 if (!adapter->tx_scrq)
2015 goto tx_failed;
2016
2017 for (i = 0; i < adapter->req_tx_queues; i++) {
2018 adapter->tx_scrq[i] = allqueues[i];
2019 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2020 }
2021
2022 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2023 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2024 if (!adapter->rx_scrq)
2025 goto rx_failed;
2026
2027 for (i = 0; i < adapter->req_rx_queues; i++) {
2028 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2029 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2030 }
2031
d346b9bc
NF		 2032 kfree(allqueues);
2033 return 0;
2034
2035rx_failed:
2036 kfree(adapter->tx_scrq);
2037 adapter->tx_scrq = NULL;
2038tx_failed:
2039 for (i = 0; i < registered_queues; i++)
2040 release_sub_crq_queue(adapter, allqueues[i]);
2041 kfree(allqueues);
2042 return -1;
2043}
2044
2045static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2046{
2047 struct device *dev = &adapter->vdev->dev;
2048 union ibmvnic_crq crq;
d346b9bc
NF		 2049
2050 if (!retry) {
2051 /* Sub-CRQ entries are 32 byte long */
2052 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2053
2054 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2055 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2056 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2057 return;
2058 }
2059
2060 /* Get the minimum between the queried max and the entries
2061 * that fit in our PAGE_SIZE
2062 */
2063 adapter->req_tx_entries_per_subcrq =
2064 adapter->max_tx_entries_per_subcrq > entries_page ?
2065 entries_page : adapter->max_tx_entries_per_subcrq;
2066 adapter->req_rx_add_entries_per_subcrq =
2067 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2068 entries_page : adapter->max_rx_add_entries_per_subcrq;
2069
2070 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2071 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2072 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2073
2074 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2075 }
2076
032c5e82
TF		 2077 memset(&crq, 0, sizeof(crq));
2078 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2079 crq.request_capability.cmd = REQUEST_CAPABILITY;
2080
2081 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2082 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2083 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2084 ibmvnic_send_crq(adapter, &crq);
2085
2086 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2087 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2088 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2089 ibmvnic_send_crq(adapter, &crq);
2090
2091 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2092 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2093 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2094 ibmvnic_send_crq(adapter, &crq);
2095
2096 crq.request_capability.capability =
2097 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2098 crq.request_capability.number =
de89e854 2099 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2100 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2101 ibmvnic_send_crq(adapter, &crq);
2102
2103 crq.request_capability.capability =
2104 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2105 crq.request_capability.number =
de89e854 2106 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2107 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2108 ibmvnic_send_crq(adapter, &crq);
2109
2110 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2111 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2112 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2113 ibmvnic_send_crq(adapter, &crq);
2114
2115 if (adapter->netdev->flags & IFF_PROMISC) {
2116 if (adapter->promisc_supported) {
2117 crq.request_capability.capability =
2118 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2119 crq.request_capability.number = cpu_to_be64(1);
901e040a 2120 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2121 ibmvnic_send_crq(adapter, &crq);
2122 }
2123 } else {
2124 crq.request_capability.capability =
2125 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2126 crq.request_capability.number = cpu_to_be64(0);
901e040a 2127 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2128 ibmvnic_send_crq(adapter, &crq);
2129 }
032c5e82
TF		 2130}
2131
2132static int pending_scrq(struct ibmvnic_adapter *adapter,
2133 struct ibmvnic_sub_crq_queue *scrq)
2134{
2135 union sub_crq *entry = &scrq->msgs[scrq->cur];
2136
90c8014c
NF		 2137 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2138 adapter->state == VNIC_CLOSING)
032c5e82
TF		 2139 return 1;
2140 else
2141 return 0;
2142}
2143
2144static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2145 struct ibmvnic_sub_crq_queue *scrq)
2146{
2147 union sub_crq *entry;
2148 unsigned long flags;
2149
2150 spin_lock_irqsave(&scrq->lock, flags);
2151 entry = &scrq->msgs[scrq->cur];
2152 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2153 if (++scrq->cur == scrq->size)
2154 scrq->cur = 0;
2155 } else {
2156 entry = NULL;
2157 }
2158 spin_unlock_irqrestore(&scrq->lock, flags);
2159
2160 return entry;
2161}
2162
2163static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2164{
2165 struct ibmvnic_crq_queue *queue = &adapter->crq;
2166 union ibmvnic_crq *crq;
2167
2168 crq = &queue->msgs[queue->cur];
2169 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2170 if (++queue->cur == queue->size)
2171 queue->cur = 0;
2172 } else {
2173 crq = NULL;
2174 }
2175
2176 return crq;
2177}
2178
2179static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2180 union sub_crq *sub_crq)
2181{
2182 unsigned int ua = adapter->vdev->unit_address;
2183 struct device *dev = &adapter->vdev->dev;
2184 u64 *u64_crq = (u64 *)sub_crq;
2185 int rc;
2186
2187 netdev_dbg(adapter->netdev,
2188 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2189 (unsigned long int)cpu_to_be64(remote_handle),
2190 (unsigned long int)cpu_to_be64(u64_crq[0]),
2191 (unsigned long int)cpu_to_be64(u64_crq[1]),
2192 (unsigned long int)cpu_to_be64(u64_crq[2]),
2193 (unsigned long int)cpu_to_be64(u64_crq[3]));
2194
2195 /* Make sure the hypervisor sees the complete request */
2196 mb();
2197
2198 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2199 cpu_to_be64(remote_handle),
2200 cpu_to_be64(u64_crq[0]),
2201 cpu_to_be64(u64_crq[1]),
2202 cpu_to_be64(u64_crq[2]),
2203 cpu_to_be64(u64_crq[3]));
2204
2205 if (rc) {
2206 if (rc == H_CLOSED)
2207 dev_warn(dev, "CRQ Queue closed\n");
2208 dev_err(dev, "Send error (rc=%d)\n", rc);
2209 }
2210
2211 return rc;
2212}
2213
ad7775dc
TF		 2214static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2215 u64 remote_handle, u64 ioba, u64 num_entries)
2216{
2217 unsigned int ua = adapter->vdev->unit_address;
2218 struct device *dev = &adapter->vdev->dev;
2219 int rc;
2220
2221 /* Make sure the hypervisor sees the complete request */
2222 mb();
2223 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2224 cpu_to_be64(remote_handle),
2225 ioba, num_entries);
2226
2227 if (rc) {
2228 if (rc == H_CLOSED)
2229 dev_warn(dev, "CRQ Queue closed\n");
2230 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2231 }
2232
2233 return rc;
2234}
2235
032c5e82
TF		 2236static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2237 union ibmvnic_crq *crq)
2238{
2239 unsigned int ua = adapter->vdev->unit_address;
2240 struct device *dev = &adapter->vdev->dev;
2241 u64 *u64_crq = (u64 *)crq;
2242 int rc;
2243
2244 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2245 (unsigned long int)cpu_to_be64(u64_crq[0]),
2246 (unsigned long int)cpu_to_be64(u64_crq[1]));
2247
2248 /* Make sure the hypervisor sees the complete request */
2249 mb();
2250
2251 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2252 cpu_to_be64(u64_crq[0]),
2253 cpu_to_be64(u64_crq[1]));
2254
2255 if (rc) {
2256 if (rc == H_CLOSED)
2257 dev_warn(dev, "CRQ Queue closed\n");
2258 dev_warn(dev, "Send error (rc=%d)\n", rc);
2259 }
2260
2261 return rc;
2262}
2263
2264static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2265{
2266 union ibmvnic_crq crq;
2267
2268 memset(&crq, 0, sizeof(crq));
2269 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2270 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2271 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2272
2273 return ibmvnic_send_crq(adapter, &crq);
2274}
2275
032c5e82
TF		 2276static int send_version_xchg(struct ibmvnic_adapter *adapter)
2277{
2278 union ibmvnic_crq crq;
2279
2280 memset(&crq, 0, sizeof(crq));
2281 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2282 crq.version_exchange.cmd = VERSION_EXCHANGE;
2283 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2284
2285 return ibmvnic_send_crq(adapter, &crq);
2286}
2287
2288static void send_login(struct ibmvnic_adapter *adapter)
2289{
2290 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2291 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2292 struct device *dev = &adapter->vdev->dev;
2293 dma_addr_t rsp_buffer_token;
2294 dma_addr_t buffer_token;
2295 size_t rsp_buffer_size;
2296 union ibmvnic_crq crq;
032c5e82
TF		 2297 size_t buffer_size;
2298 __be64 *tx_list_p;
2299 __be64 *rx_list_p;
2300 int i;
2301
2302 buffer_size =
2303 sizeof(struct ibmvnic_login_buffer) +
2304 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2305
2306 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2307 if (!login_buffer)
2308 goto buf_alloc_failed;
2309
2310 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2311 DMA_TO_DEVICE);
2312 if (dma_mapping_error(dev, buffer_token)) {
2313 dev_err(dev, "Couldn't map login buffer\n");
2314 goto buf_map_failed;
2315 }
2316
498cd8e4
JA		 2317 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2318 sizeof(u64) * adapter->req_tx_queues +
2319 sizeof(u64) * adapter->req_rx_queues +
2320 sizeof(u64) * adapter->req_rx_queues +
2321 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2322
2323 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2324 if (!login_rsp_buffer)
2325 goto buf_rsp_alloc_failed;
2326
2327 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2328 rsp_buffer_size, DMA_FROM_DEVICE);
2329 if (dma_mapping_error(dev, rsp_buffer_token)) {
2330 dev_err(dev, "Couldn't map login rsp buffer\n");
2331 goto buf_rsp_map_failed;
2332 }
661a2622 2333
032c5e82
TF		 2334 adapter->login_buf = login_buffer;
2335 adapter->login_buf_token = buffer_token;
2336 adapter->login_buf_sz = buffer_size;
2337 adapter->login_rsp_buf = login_rsp_buffer;
2338 adapter->login_rsp_buf_token = rsp_buffer_token;
2339 adapter->login_rsp_buf_sz = rsp_buffer_size;
2340
2341 login_buffer->len = cpu_to_be32(buffer_size);
2342 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2343 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2344 login_buffer->off_txcomp_subcrqs =
2345 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2346 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2347 login_buffer->off_rxcomp_subcrqs =
2348 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2349 sizeof(u64) * adapter->req_tx_queues);
2350 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2351 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2352
2353 tx_list_p = (__be64 *)((char *)login_buffer +
2354 sizeof(struct ibmvnic_login_buffer));
2355 rx_list_p = (__be64 *)((char *)login_buffer +
2356 sizeof(struct ibmvnic_login_buffer) +
2357 sizeof(u64) * adapter->req_tx_queues);
2358
2359 for (i = 0; i < adapter->req_tx_queues; i++) {
2360 if (adapter->tx_scrq[i]) {
2361 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2362 crq_num);
2363 }
2364 }
2365
2366 for (i = 0; i < adapter->req_rx_queues; i++) {
2367 if (adapter->rx_scrq[i]) {
2368 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2369 crq_num);
2370 }
2371 }
2372
2373 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2374 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2375 netdev_dbg(adapter->netdev, "%016lx\n",
2376 ((unsigned long int *)(adapter->login_buf))[i]);
2377 }
2378
2379 memset(&crq, 0, sizeof(crq));
2380 crq.login.first = IBMVNIC_CRQ_CMD;
2381 crq.login.cmd = LOGIN;
2382 crq.login.ioba = cpu_to_be32(buffer_token);
2383 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2384 ibmvnic_send_crq(adapter, &crq);
2385
2386 return;
2387
032c5e82
TF		 2388buf_rsp_map_failed:
2389 kfree(login_rsp_buffer);
2390buf_rsp_alloc_failed:
2391 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2392buf_map_failed:
2393 kfree(login_buffer);
2394buf_alloc_failed:
2395 return;
2396}
2397
2398static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2399 u32 len, u8 map_id)
2400{
2401 union ibmvnic_crq crq;
2402
2403 memset(&crq, 0, sizeof(crq));
2404 crq.request_map.first = IBMVNIC_CRQ_CMD;
2405 crq.request_map.cmd = REQUEST_MAP;
2406 crq.request_map.map_id = map_id;
2407 crq.request_map.ioba = cpu_to_be32(addr);
2408 crq.request_map.len = cpu_to_be32(len);
2409 ibmvnic_send_crq(adapter, &crq);
2410}
2411
2412static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2413{
2414 union ibmvnic_crq crq;
2415
2416 memset(&crq, 0, sizeof(crq));
2417 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2418 crq.request_unmap.cmd = REQUEST_UNMAP;
2419 crq.request_unmap.map_id = map_id;
2420 ibmvnic_send_crq(adapter, &crq);
2421}
2422
2423static void send_map_query(struct ibmvnic_adapter *adapter)
2424{
2425 union ibmvnic_crq crq;
2426
2427 memset(&crq, 0, sizeof(crq));
2428 crq.query_map.first = IBMVNIC_CRQ_CMD;
2429 crq.query_map.cmd = QUERY_MAP;
2430 ibmvnic_send_crq(adapter, &crq);
2431}
2432
2433/* Send a series of CRQs requesting various capabilities of the VNIC server */
2434static void send_cap_queries(struct ibmvnic_adapter *adapter)
2435{
2436 union ibmvnic_crq crq;
2437
901e040a 2438 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2439 memset(&crq, 0, sizeof(crq));
2440 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2441 crq.query_capability.cmd = QUERY_CAPABILITY;
2442
2443 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2444 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2445 ibmvnic_send_crq(adapter, &crq);
2446
2447 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2448 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2449 ibmvnic_send_crq(adapter, &crq);
2450
2451 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2452 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2453 ibmvnic_send_crq(adapter, &crq);
2454
2455 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2456 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2457 ibmvnic_send_crq(adapter, &crq);
2458
2459 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2460 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2461 ibmvnic_send_crq(adapter, &crq);
2462
2463 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2464 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2465 ibmvnic_send_crq(adapter, &crq);
2466
2467 crq.query_capability.capability =
2468 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2469 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2470 ibmvnic_send_crq(adapter, &crq);
2471
2472 crq.query_capability.capability =
2473 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2474 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2475 ibmvnic_send_crq(adapter, &crq);
2476
2477 crq.query_capability.capability =
2478 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2479 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2480 ibmvnic_send_crq(adapter, &crq);
2481
2482 crq.query_capability.capability =
2483 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2484 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2485 ibmvnic_send_crq(adapter, &crq);
2486
2487 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2488 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2489 ibmvnic_send_crq(adapter, &crq);
2490
2491 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2492 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2493 ibmvnic_send_crq(adapter, &crq);
2494
2495 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2496 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2497 ibmvnic_send_crq(adapter, &crq);
2498
2499 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2500 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2501 ibmvnic_send_crq(adapter, &crq);
2502
2503 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2504 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2505 ibmvnic_send_crq(adapter, &crq);
2506
2507 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2508 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2509 ibmvnic_send_crq(adapter, &crq);
2510
6052d5e2
MFV		 2511 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2512 atomic_inc(&adapter->running_cap_crqs);
2513 ibmvnic_send_crq(adapter, &crq);
2514
032c5e82 2515 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2516 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2517 ibmvnic_send_crq(adapter, &crq);
2518
2519 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2520 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2521 ibmvnic_send_crq(adapter, &crq);
2522
2523 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2524 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2525 ibmvnic_send_crq(adapter, &crq);
2526
2527 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2528 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2529 ibmvnic_send_crq(adapter, &crq);
2530
2531 crq.query_capability.capability =
2532 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2533 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2534 ibmvnic_send_crq(adapter, &crq);
2535
2536 crq.query_capability.capability =
2537 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2538 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2539 ibmvnic_send_crq(adapter, &crq);
2540
2541 crq.query_capability.capability =
2542 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2543 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2544 ibmvnic_send_crq(adapter, &crq);
2545
2546 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2547 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2548 ibmvnic_send_crq(adapter, &crq);
2549}
2550
2551static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2552{
2553 struct device *dev = &adapter->vdev->dev;
2554 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2555 union ibmvnic_crq crq;
2556 int i;
2557
2558 dma_unmap_single(dev, adapter->ip_offload_tok,
2559 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2560
2561 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2562 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2563 netdev_dbg(adapter->netdev, "%016lx\n",
2564 ((unsigned long int *)(buf))[i]);
2565
2566 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2567 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2568 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2569 buf->tcp_ipv4_chksum);
2570 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2571 buf->tcp_ipv6_chksum);
2572 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2573 buf->udp_ipv4_chksum);
2574 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2575 buf->udp_ipv6_chksum);
2576 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2577 buf->large_tx_ipv4);
2578 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2579 buf->large_tx_ipv6);
2580 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2581 buf->large_rx_ipv4);
2582 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2583 buf->large_rx_ipv6);
2584 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2585 buf->max_ipv4_header_size);
2586 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2587 buf->max_ipv6_header_size);
2588 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2589 buf->max_tcp_header_size);
2590 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2591 buf->max_udp_header_size);
2592 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2593 buf->max_large_tx_size);
2594 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2595 buf->max_large_rx_size);
2596 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2597 buf->ipv6_extension_header);
2598 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2599 buf->tcp_pseudosum_req);
2600 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2601 buf->num_ipv6_ext_headers);
2602 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2603 buf->off_ipv6_ext_headers);
2604
2605 adapter->ip_offload_ctrl_tok =
2606 dma_map_single(dev, &adapter->ip_offload_ctrl,
2607 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2608
2609 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2610 dev_err(dev, "Couldn't map ip offload control buffer\n");
2611 return;
2612 }
2613
2614 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2615 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2616 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2617 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2618 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2619
2620 /* large_tx/rx disabled for now, additional features needed */
2621 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2622 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2623 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2624 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2625
2626 adapter->netdev->features = NETIF_F_GSO;
2627
2628 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2629 adapter->netdev->features |= NETIF_F_IP_CSUM;
2630
2631 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2632 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2633
9be02cdf
TF		 2634 if ((adapter->netdev->features &
2635 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2636 adapter->netdev->features |= NETIF_F_RXCSUM;
2637
032c5e82
TF		 2638 memset(&crq, 0, sizeof(crq));
2639 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2640 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2641 crq.control_ip_offload.len =
2642 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2643 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2644 ibmvnic_send_crq(adapter, &crq);
2645}
2646
2647static void handle_error_info_rsp(union ibmvnic_crq *crq,
2648 struct ibmvnic_adapter *adapter)
2649{
2650 struct device *dev = &adapter->vdev->dev;
96183182 2651 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2652 unsigned long flags;
2653 bool found = false;
2654 int i;
2655
2656 if (!crq->request_error_rsp.rc.code) {
2657 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2658 crq->request_error_rsp.rc.code);
2659 return;
2660 }
2661
2662 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2663 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2664 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2665 found = true;
2666 list_del(&error_buff->list);
2667 break;
2668 }
2669 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2670
2671 if (!found) {
2672 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2673 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2674 return;
2675 }
2676
2677 dev_err(dev, "Detailed info for error id %x:",
75224c93 2678 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2679
2680 for (i = 0; i < error_buff->len; i++) {
2681 pr_cont("%02x", (int)error_buff->buff[i]);
2682 if (i % 8 == 7)
2683 pr_cont(" ");
2684 }
2685 pr_cont("\n");
2686
2687 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2688 DMA_FROM_DEVICE);
2689 kfree(error_buff->buff);
2690 kfree(error_buff);
2691}
2692
2f9de9ba
NF		 2693static void request_error_information(struct ibmvnic_adapter *adapter,
2694 union ibmvnic_crq *err_crq)
032c5e82 2695{
032c5e82 2696 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2697 struct net_device *netdev = adapter->netdev;
032c5e82 2698 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2699 unsigned long timeout = msecs_to_jiffies(30000);
2700 union ibmvnic_crq crq;
032c5e82 2701 unsigned long flags;
2f9de9ba 2702 int rc, detail_len;
032c5e82
TF		 2703
2704 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2705 if (!error_buff)
2706 return;
2707
2f9de9ba 2708 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2709 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2710 if (!error_buff->buff) {
2711 kfree(error_buff);
2712 return;
2713 }
2714
2715 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2716 DMA_FROM_DEVICE);
2717 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2718 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2719 kfree(error_buff->buff);
2720 kfree(error_buff);
2721 return;
2722 }
2723
032c5e82 2724 error_buff->len = detail_len;
2f9de9ba 2725 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2726
2727 spin_lock_irqsave(&adapter->error_list_lock, flags);
2728 list_add_tail(&error_buff->list, &adapter->errors);
2729 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2730
2f9de9ba
NF		 2731 memset(&crq, 0, sizeof(crq));
2732 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2733 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2734 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2735 crq.request_error_info.len = cpu_to_be32(detail_len);
2736 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2737
2738 rc = ibmvnic_send_crq(adapter, &crq);
2739 if (rc) {
2740 netdev_err(netdev, "failed to request error information\n");
2741 goto err_info_fail;
2742 }
2743
2744 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2745 netdev_err(netdev, "timeout waiting for error information\n");
2746 goto err_info_fail;
2747 }
2748
2749 return;
2750
2751err_info_fail:
2752 spin_lock_irqsave(&adapter->error_list_lock, flags);
2753 list_del(&error_buff->list);
2754 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2755
2756 kfree(error_buff->buff);
2757 kfree(error_buff);
2758}
2759
2760static void handle_error_indication(union ibmvnic_crq *crq,
2761 struct ibmvnic_adapter *adapter)
2762{
2763 struct device *dev = &adapter->vdev->dev;
2764
2765 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2766 crq->error_indication.flags
2767 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2768 be32_to_cpu(crq->error_indication.error_id),
2769 be16_to_cpu(crq->error_indication.error_cause));
2770
2771 if (be32_to_cpu(crq->error_indication.error_id))
2772 request_error_information(adapter, crq);
ed651a10
NF		 2773
2774 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2775 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 2776 else
2777 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 2778}
2779
2780static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2781 struct ibmvnic_adapter *adapter)
2782{
2783 struct net_device *netdev = adapter->netdev;
2784 struct device *dev = &adapter->vdev->dev;
2785 long rc;
2786
2787 rc = crq->change_mac_addr_rsp.rc.code;
2788 if (rc) {
2789 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2790 return;
2791 }
2792 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2793 ETH_ALEN);
2794}
2795
2796static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2797 struct ibmvnic_adapter *adapter)
2798{
2799 struct device *dev = &adapter->vdev->dev;
2800 u64 *req_value;
2801 char *name;
2802
901e040a 2803 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2804 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2805 case REQ_TX_QUEUES:
2806 req_value = &adapter->req_tx_queues;
2807 name = "tx";
2808 break;
2809 case REQ_RX_QUEUES:
2810 req_value = &adapter->req_rx_queues;
2811 name = "rx";
2812 break;
2813 case REQ_RX_ADD_QUEUES:
2814 req_value = &adapter->req_rx_add_queues;
2815 name = "rx_add";
2816 break;
2817 case REQ_TX_ENTRIES_PER_SUBCRQ:
2818 req_value = &adapter->req_tx_entries_per_subcrq;
2819 name = "tx_entries_per_subcrq";
2820 break;
2821 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2822 req_value = &adapter->req_rx_add_entries_per_subcrq;
2823 name = "rx_add_entries_per_subcrq";
2824 break;
2825 case REQ_MTU:
2826 req_value = &adapter->req_mtu;
2827 name = "mtu";
2828 break;
2829 case PROMISC_REQUESTED:
2830 req_value = &adapter->promisc;
2831 name = "promisc";
2832 break;
2833 default:
2834 dev_err(dev, "Got invalid cap request rsp %d\n",
2835 crq->request_capability.capability);
2836 return;
2837 }
2838
2839 switch (crq->request_capability_rsp.rc.code) {
2840 case SUCCESS:
2841 break;
2842 case PARTIALSUCCESS:
2843 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2844 *req_value,
28f4d165 2845 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2846 number), name);
b510888f 2847 release_sub_crqs(adapter);
28f4d165 2848 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 2849 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 2850 return;
2851 default:
2852 dev_err(dev, "Error %d in request cap rsp\n",
2853 crq->request_capability_rsp.rc.code);
2854 return;
2855 }
2856
2857 /* Done receiving requested capabilities, query IP offload support */
901e040a 2858 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2859 union ibmvnic_crq newcrq;
2860 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2861 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2862 &adapter->ip_offload_buf;
2863
249168ad 2864 adapter->wait_capability = false;
032c5e82
TF		 2865 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2866 buf_sz,
2867 DMA_FROM_DEVICE);
2868
2869 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2870 if (!firmware_has_feature(FW_FEATURE_CMO))
2871 dev_err(dev, "Couldn't map offload buffer\n");
2872 return;
2873 }
2874
2875 memset(&newcrq, 0, sizeof(newcrq));
2876 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2877 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2878 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2879 newcrq.query_ip_offload.ioba =
2880 cpu_to_be32(adapter->ip_offload_tok);
2881
2882 ibmvnic_send_crq(adapter, &newcrq);
2883 }
2884}
2885
2886static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2887 struct ibmvnic_adapter *adapter)
2888{
2889 struct device *dev = &adapter->vdev->dev;
2890 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2891 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 2892 int i;
2893
2894 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2895 DMA_BIDIRECTIONAL);
2896 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2897 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2898
498cd8e4
JA		 2899 /* If the number of queues requested can't be allocated by the
2900 * server, the login response will return with code 1. We will need
2901 * to resend the login buffer with fewer queues requested.
2902 */
2903 if (login_rsp_crq->generic.rc.code) {
2904 adapter->renegotiate = true;
2905 complete(&adapter->init_done);
2906 return 0;
2907 }
2908
032c5e82
TF		 2909 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2910 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2911 netdev_dbg(adapter->netdev, "%016lx\n",
2912 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2913 }
2914
2915 /* Sanity checks */
2916 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2917 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2918 adapter->req_rx_add_queues !=
2919 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2920 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2921 ibmvnic_remove(adapter->vdev);
2922 return -EIO;
2923 }
2924 complete(&adapter->init_done);
2925
032c5e82
TF		 2926 return 0;
2927}
2928
2929static void handle_request_map_rsp(union ibmvnic_crq *crq,
2930 struct ibmvnic_adapter *adapter)
2931{
2932 struct device *dev = &adapter->vdev->dev;
2933 u8 map_id = crq->request_map_rsp.map_id;
2934 int tx_subcrqs;
2935 int rx_subcrqs;
2936 long rc;
2937 int i;
2938
2939 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2940 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2941
2942 rc = crq->request_map_rsp.rc.code;
2943 if (rc) {
2944 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2945 adapter->map_id--;
2946 /* need to find and zero tx/rx_pool map_id */
2947 for (i = 0; i < tx_subcrqs; i++) {
2948 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2949 adapter->tx_pool[i].long_term_buff.map_id = 0;
2950 }
2951 for (i = 0; i < rx_subcrqs; i++) {
2952 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2953 adapter->rx_pool[i].long_term_buff.map_id = 0;
2954 }
2955 }
2956 complete(&adapter->fw_done);
2957}
2958
2959static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2960 struct ibmvnic_adapter *adapter)
2961{
2962 struct device *dev = &adapter->vdev->dev;
2963 long rc;
2964
2965 rc = crq->request_unmap_rsp.rc.code;
2966 if (rc)
2967 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2968}
2969
2970static void handle_query_map_rsp(union ibmvnic_crq *crq,
2971 struct ibmvnic_adapter *adapter)
2972{
2973 struct net_device *netdev = adapter->netdev;
2974 struct device *dev = &adapter->vdev->dev;
2975 long rc;
2976
2977 rc = crq->query_map_rsp.rc.code;
2978 if (rc) {
2979 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2980 return;
2981 }
2982 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2983 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2984 crq->query_map_rsp.free_pages);
2985}
2986
2987static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2988 struct ibmvnic_adapter *adapter)
2989{
2990 struct net_device *netdev = adapter->netdev;
2991 struct device *dev = &adapter->vdev->dev;
2992 long rc;
2993
901e040a 2994 atomic_dec(&adapter->running_cap_crqs);
032c5e82 2995 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 2996 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 2997 rc = crq->query_capability.rc.code;
2998 if (rc) {
2999 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3000 goto out;
3001 }
3002
3003 switch (be16_to_cpu(crq->query_capability.capability)) {
3004 case MIN_TX_QUEUES:
3005 adapter->min_tx_queues =
de89e854 3006 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3007 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3008 adapter->min_tx_queues);
3009 break;
3010 case MIN_RX_QUEUES:
3011 adapter->min_rx_queues =
de89e854 3012 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3013 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3014 adapter->min_rx_queues);
3015 break;
3016 case MIN_RX_ADD_QUEUES:
3017 adapter->min_rx_add_queues =
de89e854 3018 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3019 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3020 adapter->min_rx_add_queues);
3021 break;
3022 case MAX_TX_QUEUES:
3023 adapter->max_tx_queues =
de89e854 3024 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3025 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3026 adapter->max_tx_queues);
3027 break;
3028 case MAX_RX_QUEUES:
3029 adapter->max_rx_queues =
de89e854 3030 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3031 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3032 adapter->max_rx_queues);
3033 break;
3034 case MAX_RX_ADD_QUEUES:
3035 adapter->max_rx_add_queues =
de89e854 3036 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3037 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3038 adapter->max_rx_add_queues);
3039 break;
3040 case MIN_TX_ENTRIES_PER_SUBCRQ:
3041 adapter->min_tx_entries_per_subcrq =
de89e854 3042 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3043 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3044 adapter->min_tx_entries_per_subcrq);
3045 break;
3046 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3047 adapter->min_rx_add_entries_per_subcrq =
de89e854 3048 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3049 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3050 adapter->min_rx_add_entries_per_subcrq);
3051 break;
3052 case MAX_TX_ENTRIES_PER_SUBCRQ:
3053 adapter->max_tx_entries_per_subcrq =
de89e854 3054 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3055 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3056 adapter->max_tx_entries_per_subcrq);
3057 break;
3058 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3059 adapter->max_rx_add_entries_per_subcrq =
de89e854 3060 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3061 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3062 adapter->max_rx_add_entries_per_subcrq);
3063 break;
3064 case TCP_IP_OFFLOAD:
3065 adapter->tcp_ip_offload =
de89e854 3066 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3067 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3068 adapter->tcp_ip_offload);
3069 break;
3070 case PROMISC_SUPPORTED:
3071 adapter->promisc_supported =
de89e854 3072 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3073 netdev_dbg(netdev, "promisc_supported = %lld\n",
3074 adapter->promisc_supported);
3075 break;
3076 case MIN_MTU:
de89e854 3077 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3078 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3079 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3080 break;
3081 case MAX_MTU:
de89e854 3082 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3083 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3084 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3085 break;
3086 case MAX_MULTICAST_FILTERS:
3087 adapter->max_multicast_filters =
de89e854 3088 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3089 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3090 adapter->max_multicast_filters);
3091 break;
3092 case VLAN_HEADER_INSERTION:
3093 adapter->vlan_header_insertion =
de89e854 3094 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3095 if (adapter->vlan_header_insertion)
3096 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3097 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3098 adapter->vlan_header_insertion);
3099 break;
6052d5e2
MFV		 3100 case RX_VLAN_HEADER_INSERTION:
3101 adapter->rx_vlan_header_insertion =
3102 be64_to_cpu(crq->query_capability.number);
3103 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3104 adapter->rx_vlan_header_insertion);
3105 break;
032c5e82
TF		 3106 case MAX_TX_SG_ENTRIES:
3107 adapter->max_tx_sg_entries =
de89e854 3108 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3109 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3110 adapter->max_tx_sg_entries);
3111 break;
3112 case RX_SG_SUPPORTED:
3113 adapter->rx_sg_supported =
de89e854 3114 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3115 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3116 adapter->rx_sg_supported);
3117 break;
3118 case OPT_TX_COMP_SUB_QUEUES:
3119 adapter->opt_tx_comp_sub_queues =
de89e854 3120 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3121 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3122 adapter->opt_tx_comp_sub_queues);
3123 break;
3124 case OPT_RX_COMP_QUEUES:
3125 adapter->opt_rx_comp_queues =
de89e854 3126 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3127 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3128 adapter->opt_rx_comp_queues);
3129 break;
3130 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3131 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3132 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3133 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3134 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3135 break;
3136 case OPT_TX_ENTRIES_PER_SUBCRQ:
3137 adapter->opt_tx_entries_per_subcrq =
de89e854 3138 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3139 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3140 adapter->opt_tx_entries_per_subcrq);
3141 break;
3142 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3143 adapter->opt_rxba_entries_per_subcrq =
de89e854 3144 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3145 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3146 adapter->opt_rxba_entries_per_subcrq);
3147 break;
3148 case TX_RX_DESC_REQ:
3149 adapter->tx_rx_desc_req = crq->query_capability.number;
3150 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3151 adapter->tx_rx_desc_req);
3152 break;
3153
3154 default:
3155 netdev_err(netdev, "Got invalid cap rsp %d\n",
3156 crq->query_capability.capability);
3157 }
3158
3159out:
249168ad
TF		 3160 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3161 adapter->wait_capability = false;
d346b9bc 3162 ibmvnic_send_req_caps(adapter, 0);
249168ad 3163 }
032c5e82
TF		 3164}
3165
032c5e82
TF		 3166static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3167 struct ibmvnic_adapter *adapter)
3168{
3169 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3170 struct net_device *netdev = adapter->netdev;
3171 struct device *dev = &adapter->vdev->dev;
993a82b0 3172 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3173 long rc;
3174
3175 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3176 (unsigned long int)cpu_to_be64(u64_crq[0]),
3177 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3178 switch (gen_crq->first) {
3179 case IBMVNIC_CRQ_INIT_RSP:
3180 switch (gen_crq->cmd) {
3181 case IBMVNIC_CRQ_INIT:
3182 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3183 adapter->from_passive_init = true;
3184 complete(&adapter->init_done);
032c5e82
TF		 3185 break;
3186 case IBMVNIC_CRQ_INIT_COMPLETE:
3187 dev_info(dev, "Partner initialization complete\n");
3188 send_version_xchg(adapter);
3189 break;
3190 default:
3191 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3192 }
3193 return;
3194 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3195 netif_carrier_off(netdev);
032c5e82 3196 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3197 dev_info(dev, "Migrated, re-enabling adapter\n");
3198 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3199 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3200 dev_info(dev, "Backing device failover detected\n");
ed651a10 3201 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3202 } else {
3203 /* The adapter lost the connection */
3204 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3205 gen_crq->cmd);
ed651a10 3206 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3207 }
3208 return;
3209 case IBMVNIC_CRQ_CMD_RSP:
3210 break;
3211 default:
3212 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3213 gen_crq->first);
3214 return;
3215 }
3216
3217 switch (gen_crq->cmd) {
3218 case VERSION_EXCHANGE_RSP:
3219 rc = crq->version_exchange_rsp.rc.code;
3220 if (rc) {
3221 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3222 break;
3223 }
3224 dev_info(dev, "Partner protocol version is %d\n",
3225 crq->version_exchange_rsp.version);
3226 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3227 ibmvnic_version)
3228 ibmvnic_version =
3229 be16_to_cpu(crq->version_exchange_rsp.version);
3230 send_cap_queries(adapter);
3231 break;
3232 case QUERY_CAPABILITY_RSP:
3233 handle_query_cap_rsp(crq, adapter);
3234 break;
3235 case QUERY_MAP_RSP:
3236 handle_query_map_rsp(crq, adapter);
3237 break;
3238 case REQUEST_MAP_RSP:
3239 handle_request_map_rsp(crq, adapter);
3240 break;
3241 case REQUEST_UNMAP_RSP:
3242 handle_request_unmap_rsp(crq, adapter);
3243 break;
3244 case REQUEST_CAPABILITY_RSP:
3245 handle_request_cap_rsp(crq, adapter);
3246 break;
3247 case LOGIN_RSP:
3248 netdev_dbg(netdev, "Got Login Response\n");
3249 handle_login_rsp(crq, adapter);
3250 break;
3251 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3252 netdev_dbg(netdev,
3253 "Got Logical Link State Response, state: %d rc: %d\n",
3254 crq->logical_link_state_rsp.link_state,
3255 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3256 adapter->logical_link_state =
3257 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3258 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3259 complete(&adapter->init_done);
032c5e82
TF		 3260 break;
3261 case LINK_STATE_INDICATION:
3262 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3263 adapter->phys_link_state =
3264 crq->link_state_indication.phys_link_state;
3265 adapter->logical_link_state =
3266 crq->link_state_indication.logical_link_state;
3267 break;
3268 case CHANGE_MAC_ADDR_RSP:
3269 netdev_dbg(netdev, "Got MAC address change Response\n");
3270 handle_change_mac_rsp(crq, adapter);
3271 break;
3272 case ERROR_INDICATION:
3273 netdev_dbg(netdev, "Got Error Indication\n");
3274 handle_error_indication(crq, adapter);
3275 break;
3276 case REQUEST_ERROR_RSP:
3277 netdev_dbg(netdev, "Got Error Detail Response\n");
3278 handle_error_info_rsp(crq, adapter);
3279 break;
3280 case REQUEST_STATISTICS_RSP:
3281 netdev_dbg(netdev, "Got Statistics Response\n");
3282 complete(&adapter->stats_done);
3283 break;
032c5e82
TF		 3284 case QUERY_IP_OFFLOAD_RSP:
3285 netdev_dbg(netdev, "Got Query IP offload Response\n");
3286 handle_query_ip_offload_rsp(adapter);
3287 break;
3288 case MULTICAST_CTRL_RSP:
3289 netdev_dbg(netdev, "Got multicast control Response\n");
3290 break;
3291 case CONTROL_IP_OFFLOAD_RSP:
3292 netdev_dbg(netdev, "Got Control IP offload Response\n");
3293 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3294 sizeof(adapter->ip_offload_ctrl),
3295 DMA_TO_DEVICE);
bd0b6723 3296 complete(&adapter->init_done);
032c5e82 3297 break;
032c5e82
TF		 3298 case COLLECT_FW_TRACE_RSP:
3299 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3300 complete(&adapter->fw_done);
3301 break;
3302 default:
3303 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3304 gen_crq->cmd);
3305 }
3306}
3307
3308static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3309{
3310 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3311
6c267b3d 3312 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3313 return IRQ_HANDLED;
3314}
3315
3316static void ibmvnic_tasklet(void *data)
3317{
3318 struct ibmvnic_adapter *adapter = data;
032c5e82 3319 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3320 union ibmvnic_crq *crq;
3321 unsigned long flags;
3322 bool done = false;
3323
3324 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3325 while (!done) {
3326 /* Pull all the valid messages off the CRQ */
3327 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3328 ibmvnic_handle_crq(crq, adapter);
3329 crq->generic.first = 0;
3330 }
ed7ecbf7
BK		 3331
3332 /* remain in tasklet until all
3333 * capabilities responses are received
3334 */
3335 if (!adapter->wait_capability)
3336 done = true;
032c5e82 3337 }
249168ad
TF		 3338 /* if capabilities CRQ's were sent in this tasklet, the following
3339 * tasklet must wait until all responses are received
3340 */
3341 if (atomic_read(&adapter->running_cap_crqs) != 0)
3342 adapter->wait_capability = true;
032c5e82 3343 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3344}
3345
3346static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3347{
3348 struct vio_dev *vdev = adapter->vdev;
3349 int rc;
3350
3351 do {
3352 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3353 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3354
3355 if (rc)
3356 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3357
3358 return rc;
3359}
3360
3361static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3362{
3363 struct ibmvnic_crq_queue *crq = &adapter->crq;
3364 struct device *dev = &adapter->vdev->dev;
3365 struct vio_dev *vdev = adapter->vdev;
3366 int rc;
3367
3368 /* Close the CRQ */
3369 do {
3370 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3371 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3372
3373 /* Clean out the queue */
3374 memset(crq->msgs, 0, PAGE_SIZE);
3375 crq->cur = 0;
3376
3377 /* And re-open it again */
3378 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3379 crq->msg_token, PAGE_SIZE);
3380
3381 if (rc == H_CLOSED)
3382 /* Adapter is good, but other end is not ready */
3383 dev_warn(dev, "Partner adapter not ready\n");
3384 else if (rc != 0)
3385 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3386
3387 return rc;
3388}
3389
f992887c 3390static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3391{
3392 struct ibmvnic_crq_queue *crq = &adapter->crq;
3393 struct vio_dev *vdev = adapter->vdev;
3394 long rc;
3395
f992887c
NF		 3396 if (!crq->msgs)
3397 return;
3398
032c5e82
TF		 3399 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3400 free_irq(vdev->irq, adapter);
6c267b3d 3401 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3402 do {
3403 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3404 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3405
3406 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3407 DMA_BIDIRECTIONAL);
3408 free_page((unsigned long)crq->msgs);
f992887c 3409 crq->msgs = NULL;
032c5e82
TF		 3410}
3411
f992887c 3412static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3413{
3414 struct ibmvnic_crq_queue *crq = &adapter->crq;
3415 struct device *dev = &adapter->vdev->dev;
3416 struct vio_dev *vdev = adapter->vdev;
3417 int rc, retrc = -ENOMEM;
3418
f992887c
NF		 3419 if (crq->msgs)
3420 return 0;
3421
032c5e82
TF		 3422 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3423 /* Should we allocate more than one page? */
3424
3425 if (!crq->msgs)
3426 return -ENOMEM;
3427
3428 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3429 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3430 DMA_BIDIRECTIONAL);
3431 if (dma_mapping_error(dev, crq->msg_token))
3432 goto map_failed;
3433
3434 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3435 crq->msg_token, PAGE_SIZE);
3436
3437 if (rc == H_RESOURCE)
3438 /* maybe kexecing and resource is busy. try a reset */
3439 rc = ibmvnic_reset_crq(adapter);
3440 retrc = rc;
3441
3442 if (rc == H_CLOSED) {
3443 dev_warn(dev, "Partner adapter not ready\n");
3444 } else if (rc) {
3445 dev_warn(dev, "Error %d opening adapter\n", rc);
3446 goto reg_crq_failed;
3447 }
3448
3449 retrc = 0;
3450
6c267b3d
TF		 3451 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3452 (unsigned long)adapter);
3453
032c5e82
TF		 3454 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3455 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3456 adapter);
3457 if (rc) {
3458 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3459 vdev->irq, rc);
3460 goto req_irq_failed;
3461 }
3462
3463 rc = vio_enable_interrupts(vdev);
3464 if (rc) {
3465 dev_err(dev, "Error %d enabling interrupts\n", rc);
3466 goto req_irq_failed;
3467 }
3468
3469 crq->cur = 0;
3470 spin_lock_init(&crq->lock);
3471
3472 return retrc;
3473
3474req_irq_failed:
6c267b3d 3475 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3476 do {
3477 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3478 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3479reg_crq_failed:
3480 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3481map_failed:
3482 free_page((unsigned long)crq->msgs);
f992887c 3483 crq->msgs = NULL;
032c5e82
TF		 3484 return retrc;
3485}
3486
f6ef6408 3487static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3488{
f6ef6408 3489 struct device *dev = &adapter->vdev->dev;
ea22d51a 3490 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3491 int rc;
3492
f992887c 3493 rc = init_crq_queue(adapter);
f6ef6408
JA		 3494 if (rc) {
3495 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3496 return rc;
3497 }
3498
017892c1
JA		 3499 adapter->from_passive_init = false;
3500
f6ef6408
JA		 3501 init_completion(&adapter->init_done);
3502 ibmvnic_send_crq_init(adapter);
3503 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3504 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 3505 return -1;
3506 }
3507
3508 if (adapter->from_passive_init) {
3509 adapter->state = VNIC_OPEN;
3510 adapter->from_passive_init = false;
f6ef6408
JA		 3511 return -1;
3512 }
3513
1bb3c739
NF		 3514 rc = init_sub_crqs(adapter);
3515 if (rc) {
3516 dev_err(dev, "Initialization of sub crqs failed\n");
3517 release_crq_queue(adapter);
3518 }
3519
3520 return rc;
f6ef6408
JA		 3521}
3522
3523static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3524{
032c5e82
TF		 3525 struct ibmvnic_adapter *adapter;
3526 struct net_device *netdev;
3527 unsigned char *mac_addr_p;
032c5e82
TF		 3528 int rc;
3529
3530 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3531 dev->unit_address);
3532
3533 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3534 VETH_MAC_ADDR, NULL);
3535 if (!mac_addr_p) {
3536 dev_err(&dev->dev,
3537 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3538 __FILE__, __LINE__);
3539 return 0;
3540 }
3541
3542 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3543 IBMVNIC_MAX_TX_QUEUES);
3544 if (!netdev)
3545 return -ENOMEM;
3546
3547 adapter = netdev_priv(netdev);
90c8014c 3548 adapter->state = VNIC_PROBING;
032c5e82
TF		 3549 dev_set_drvdata(&dev->dev, netdev);
3550 adapter->vdev = dev;
3551 adapter->netdev = netdev;
3552
3553 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3554 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3555 netdev->irq = dev->irq;
3556 netdev->netdev_ops = &ibmvnic_netdev_ops;
3557 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3558 SET_NETDEV_DEV(netdev, &dev->dev);
3559
3560 spin_lock_init(&adapter->stats_lock);
3561
032c5e82 3562 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3563 spin_lock_init(&adapter->error_list_lock);
032c5e82 3564
ed651a10
NF		 3565 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3566 INIT_LIST_HEAD(&adapter->rwi_list);
3567 mutex_init(&adapter->reset_lock);
3568 mutex_init(&adapter->rwi_lock);
3569 adapter->resetting = false;
3570
f6ef6408
JA		 3571 rc = ibmvnic_init(adapter);
3572 if (rc) {
3573 free_netdev(netdev);
3574 return rc;
032c5e82 3575 }
032c5e82 3576
f39f0d1e 3577 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82
TF		 3578
3579 rc = register_netdev(netdev);
3580 if (rc) {
3581 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3582 free_netdev(netdev);
3583 return rc;
032c5e82
TF		 3584 }
3585 dev_info(&dev->dev, "ibmvnic registered\n");
3586
90c8014c 3587 adapter->state = VNIC_PROBED;
032c5e82 3588 return 0;
032c5e82
TF		 3589}
3590
3591static int ibmvnic_remove(struct vio_dev *dev)
3592{
3593 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3594 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3595
90c8014c 3596 adapter->state = VNIC_REMOVING;
032c5e82 3597 unregister_netdev(netdev);
ed651a10 3598 mutex_lock(&adapter->reset_lock);
37489055
NF		 3599
3600 release_resources(adapter);
3601 release_sub_crqs(adapter);
3602 release_crq_queue(adapter);
3603
90c8014c
NF		 3604 adapter->state = VNIC_REMOVED;
3605
ed651a10 3606 mutex_unlock(&adapter->reset_lock);
032c5e82
TF		 3607 free_netdev(netdev);
3608 dev_set_drvdata(&dev->dev, NULL);
3609
3610 return 0;
3611}
3612
3613static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3614{
3615 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3616 struct ibmvnic_adapter *adapter;
3617 struct iommu_table *tbl;
3618 unsigned long ret = 0;
3619 int i;
3620
3621 tbl = get_iommu_table_base(&vdev->dev);
3622
3623 /* netdev inits at probe time along with the structures we need below*/
3624 if (!netdev)
3625 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3626
3627 adapter = netdev_priv(netdev);
3628
3629 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3630 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3631
3632 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3633 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3634
3635 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3636 i++)
3637 ret += adapter->rx_pool[i].size *
3638 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3639
3640 return ret;
3641}
3642
3643static int ibmvnic_resume(struct device *dev)
3644{
3645 struct net_device *netdev = dev_get_drvdata(dev);
3646 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3647 int i;
3648
3649 /* kick the interrupt handlers just in case we lost an interrupt */
3650 for (i = 0; i < adapter->req_rx_queues; i++)
3651 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3652 adapter->rx_scrq[i]);
3653
3654 return 0;
3655}
3656
3657static struct vio_device_id ibmvnic_device_table[] = {
3658 {"network", "IBM,vnic"},
3659 {"", "" }
3660};
3661MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3662
3663static const struct dev_pm_ops ibmvnic_pm_ops = {
3664 .resume = ibmvnic_resume
3665};
3666
3667static struct vio_driver ibmvnic_driver = {
3668 .id_table = ibmvnic_device_table,
3669 .probe = ibmvnic_probe,
3670 .remove = ibmvnic_remove,
3671 .get_desired_dma = ibmvnic_get_desired_dma,
3672 .name = ibmvnic_driver_name,
3673 .pm = &ibmvnic_pm_ops,
3674};
3675
3676/* module functions */
3677static int __init ibmvnic_module_init(void)
3678{
3679 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3680 IBMVNIC_DRIVER_VERSION);
3681
3682 return vio_register_driver(&ibmvnic_driver);
3683}
3684
3685static void __exit ibmvnic_module_exit(void)
3686{
3687 vio_unregister_driver(&ibmvnic_driver);
3688}
3689
3690module_init(ibmvnic_module_init);
3691module_exit(ibmvnic_module_exit);
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