projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'mlxsw-Improve-extensibility'
[linux-2.6-block.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
62#include <linux/in.h>
63#include <linux/ip.h>
ad7775dc 64#include <linux/ipv6.h>
032c5e82
TF		 65#include <linux/irq.h>
66#include <linux/kthread.h>
67#include <linux/seq_file.h>
032c5e82
TF		 68#include <linux/interrupt.h>
69#include <net/net_namespace.h>
70#include <asm/hvcall.h>
71#include <linux/atomic.h>
72#include <asm/vio.h>
73#include <asm/iommu.h>
74#include <linux/uaccess.h>
75#include <asm/firmware.h>
65dc6891 76#include <linux/workqueue.h>
6052d5e2 77#include <linux/if_vlan.h>
032c5e82
TF		 78
79#include "ibmvnic.h"
80
81static const char ibmvnic_driver_name[] = "ibmvnic";
82static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
84MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
85MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90static int ibmvnic_remove(struct vio_dev *);
91static void release_sub_crqs(struct ibmvnic_adapter *);
92static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
ad7775dc 98static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 99static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static int ibmvnic_poll(struct napi_struct *napi, int data);
109static void send_map_query(struct ibmvnic_adapter *adapter);
110static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 112static void send_login(struct ibmvnic_adapter *adapter);
113static void send_cap_queries(struct ibmvnic_adapter *adapter);
114static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 115static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 116static void release_crq_queue(struct ibmvnic_adapter *);
032c5e82
TF		 117
118struct ibmvnic_stat {
119 char name[ETH_GSTRING_LEN];
120 int offset;
121};
122
123#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
124 offsetof(struct ibmvnic_statistics, stat))
125#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
126
127static const struct ibmvnic_stat ibmvnic_stats[] = {
128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
150};
151
152static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
153 unsigned long length, unsigned long *number,
154 unsigned long *irq)
155{
156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
157 long rc;
158
159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
160 *number = retbuf[0];
161 *irq = retbuf[1];
162
163 return rc;
164}
165
032c5e82
TF		 166static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
167 struct ibmvnic_long_term_buff *ltb, int size)
168{
169 struct device *dev = &adapter->vdev->dev;
170
171 ltb->size = size;
172 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
173 GFP_KERNEL);
174
175 if (!ltb->buff) {
176 dev_err(dev, "Couldn't alloc long term buffer\n");
177 return -ENOMEM;
178 }
179 ltb->map_id = adapter->map_id;
180 adapter->map_id++;
db5d0b59
NF		 181
182 init_completion(&adapter->fw_done);
032c5e82
TF		 183 send_request_map(adapter, ltb->addr,
184 ltb->size, ltb->map_id);
032c5e82
TF		 185 wait_for_completion(&adapter->fw_done);
186 return 0;
187}
188
189static void free_long_term_buff(struct ibmvnic_adapter *adapter,
190 struct ibmvnic_long_term_buff *ltb)
191{
192 struct device *dev = &adapter->vdev->dev;
193
c657e32c
NF		 194 if (!ltb->buff)
195 return;
196
ed651a10
NF		 197 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
198 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 199 send_request_unmap(adapter, ltb->map_id);
59af56c2 200 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 201}
202
032c5e82
TF		 203static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
204 struct ibmvnic_rx_pool *pool)
205{
206 int count = pool->size - atomic_read(&pool->available);
207 struct device *dev = &adapter->vdev->dev;
208 int buffers_added = 0;
209 unsigned long lpar_rc;
210 union sub_crq sub_crq;
211 struct sk_buff *skb;
212 unsigned int offset;
213 dma_addr_t dma_addr;
214 unsigned char *dst;
215 u64 *handle_array;
216 int shift = 0;
217 int index;
218 int i;
219
220 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
221 be32_to_cpu(adapter->login_rsp_buf->
222 off_rxadd_subcrqs));
223
224 for (i = 0; i < count; ++i) {
225 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
226 if (!skb) {
227 dev_err(dev, "Couldn't replenish rx buff\n");
228 adapter->replenish_no_mem++;
229 break;
230 }
231
232 index = pool->free_map[pool->next_free];
233
234 if (pool->rx_buff[index].skb)
235 dev_err(dev, "Inconsistent free_map!\n");
236
237 /* Copy the skb to the long term mapped DMA buffer */
238 offset = index * pool->buff_size;
239 dst = pool->long_term_buff.buff + offset;
240 memset(dst, 0, pool->buff_size);
241 dma_addr = pool->long_term_buff.addr + offset;
242 pool->rx_buff[index].data = dst;
243
244 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
245 pool->rx_buff[index].dma = dma_addr;
246 pool->rx_buff[index].skb = skb;
247 pool->rx_buff[index].pool_index = pool->index;
248 pool->rx_buff[index].size = pool->buff_size;
249
250 memset(&sub_crq, 0, sizeof(sub_crq));
251 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
252 sub_crq.rx_add.correlator =
253 cpu_to_be64((u64)&pool->rx_buff[index]);
254 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
255 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
256
257 /* The length field of the sCRQ is defined to be 24 bits so the
258 * buffer size needs to be left shifted by a byte before it is
259 * converted to big endian to prevent the last byte from being
260 * truncated.
261 */
262#ifdef __LITTLE_ENDIAN__
263 shift = 8;
264#endif
265 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
266
267 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
268 &sub_crq);
269 if (lpar_rc != H_SUCCESS)
270 goto failure;
271
272 buffers_added++;
273 adapter->replenish_add_buff_success++;
274 pool->next_free = (pool->next_free + 1) % pool->size;
275 }
276 atomic_add(buffers_added, &pool->available);
277 return;
278
279failure:
280 dev_info(dev, "replenish pools failure\n");
281 pool->free_map[pool->next_free] = index;
282 pool->rx_buff[index].skb = NULL;
283 if (!dma_mapping_error(dev, dma_addr))
284 dma_unmap_single(dev, dma_addr, pool->buff_size,
285 DMA_FROM_DEVICE);
286
287 dev_kfree_skb_any(skb);
288 adapter->replenish_add_buff_failure++;
289 atomic_add(buffers_added, &pool->available);
290}
291
292static void replenish_pools(struct ibmvnic_adapter *adapter)
293{
294 int i;
295
032c5e82
TF		 296 adapter->replenish_task_cycles++;
297 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
298 i++) {
299 if (adapter->rx_pool[i].active)
300 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
301 }
302}
303
7bbc27a4
NF		 304static void release_stats_token(struct ibmvnic_adapter *adapter)
305{
306 struct device *dev = &adapter->vdev->dev;
307
308 if (!adapter->stats_token)
309 return;
310
311 dma_unmap_single(dev, adapter->stats_token,
312 sizeof(struct ibmvnic_statistics),
313 DMA_FROM_DEVICE);
314 adapter->stats_token = 0;
315}
316
317static int init_stats_token(struct ibmvnic_adapter *adapter)
318{
319 struct device *dev = &adapter->vdev->dev;
320 dma_addr_t stok;
321
322 stok = dma_map_single(dev, &adapter->stats,
323 sizeof(struct ibmvnic_statistics),
324 DMA_FROM_DEVICE);
325 if (dma_mapping_error(dev, stok)) {
326 dev_err(dev, "Couldn't map stats buffer\n");
327 return -1;
328 }
329
330 adapter->stats_token = stok;
331 return 0;
332}
333
0ffe2cb7 334static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 335{
0ffe2cb7
NF		 336 struct ibmvnic_rx_pool *rx_pool;
337 int rx_scrqs;
338 int i, j;
032c5e82 339
0ffe2cb7 340 if (!adapter->rx_pool)
032c5e82
TF		 341 return;
342
0ffe2cb7
NF		 343 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
344 for (i = 0; i < rx_scrqs; i++) {
345 rx_pool = &adapter->rx_pool[i];
346
347 kfree(rx_pool->free_map);
348 free_long_term_buff(adapter, &rx_pool->long_term_buff);
349
350 if (!rx_pool->rx_buff)
e0ebe942 351 continue;
0ffe2cb7
NF		 352
353 for (j = 0; j < rx_pool->size; j++) {
354 if (rx_pool->rx_buff[j].skb) {
355 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
356 rx_pool->rx_buff[i].skb = NULL;
357 }
358 }
359
360 kfree(rx_pool->rx_buff);
361 }
362
363 kfree(adapter->rx_pool);
364 adapter->rx_pool = NULL;
365}
366
367static int init_rx_pools(struct net_device *netdev)
368{
369 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
370 struct device *dev = &adapter->vdev->dev;
371 struct ibmvnic_rx_pool *rx_pool;
372 int rxadd_subcrqs;
373 u64 *size_array;
374 int i, j;
375
376 rxadd_subcrqs =
377 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
378 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
379 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
380
381 adapter->rx_pool = kcalloc(rxadd_subcrqs,
382 sizeof(struct ibmvnic_rx_pool),
383 GFP_KERNEL);
384 if (!adapter->rx_pool) {
385 dev_err(dev, "Failed to allocate rx pools\n");
386 return -1;
387 }
388
389 for (i = 0; i < rxadd_subcrqs; i++) {
390 rx_pool = &adapter->rx_pool[i];
391
392 netdev_dbg(adapter->netdev,
393 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
394 i, adapter->req_rx_add_entries_per_subcrq,
395 be64_to_cpu(size_array[i]));
396
397 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
398 rx_pool->index = i;
399 rx_pool->buff_size = be64_to_cpu(size_array[i]);
400 rx_pool->active = 1;
401
402 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
403 GFP_KERNEL);
404 if (!rx_pool->free_map) {
405 release_rx_pools(adapter);
406 return -1;
032c5e82 407 }
0ffe2cb7
NF		 408
409 rx_pool->rx_buff = kcalloc(rx_pool->size,
410 sizeof(struct ibmvnic_rx_buff),
411 GFP_KERNEL);
412 if (!rx_pool->rx_buff) {
413 dev_err(dev, "Couldn't alloc rx buffers\n");
414 release_rx_pools(adapter);
415 return -1;
416 }
417
418 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
419 rx_pool->size * rx_pool->buff_size)) {
420 release_rx_pools(adapter);
421 return -1;
422 }
423
424 for (j = 0; j < rx_pool->size; ++j)
425 rx_pool->free_map[j] = j;
426
427 atomic_set(&rx_pool->available, 0);
428 rx_pool->next_alloc = 0;
429 rx_pool->next_free = 0;
032c5e82 430 }
0ffe2cb7
NF		 431
432 return 0;
032c5e82
TF		 433}
434
c657e32c
NF		 435static void release_tx_pools(struct ibmvnic_adapter *adapter)
436{
437 struct ibmvnic_tx_pool *tx_pool;
438 int i, tx_scrqs;
439
440 if (!adapter->tx_pool)
441 return;
442
443 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
444 for (i = 0; i < tx_scrqs; i++) {
445 tx_pool = &adapter->tx_pool[i];
446 kfree(tx_pool->tx_buff);
447 free_long_term_buff(adapter, &tx_pool->long_term_buff);
448 kfree(tx_pool->free_map);
449 }
450
451 kfree(adapter->tx_pool);
452 adapter->tx_pool = NULL;
453}
454
455static int init_tx_pools(struct net_device *netdev)
456{
457 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
458 struct device *dev = &adapter->vdev->dev;
459 struct ibmvnic_tx_pool *tx_pool;
460 int tx_subcrqs;
461 int i, j;
462
463 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
464 adapter->tx_pool = kcalloc(tx_subcrqs,
465 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
466 if (!adapter->tx_pool)
467 return -1;
468
469 for (i = 0; i < tx_subcrqs; i++) {
470 tx_pool = &adapter->tx_pool[i];
471 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
472 sizeof(struct ibmvnic_tx_buff),
473 GFP_KERNEL);
474 if (!tx_pool->tx_buff) {
475 dev_err(dev, "tx pool buffer allocation failed\n");
476 release_tx_pools(adapter);
477 return -1;
478 }
479
480 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
481 adapter->req_tx_entries_per_subcrq *
482 adapter->req_mtu)) {
483 release_tx_pools(adapter);
484 return -1;
485 }
486
487 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
488 sizeof(int), GFP_KERNEL);
489 if (!tx_pool->free_map) {
490 release_tx_pools(adapter);
491 return -1;
492 }
493
494 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
495 tx_pool->free_map[j] = j;
496
497 tx_pool->consumer_index = 0;
498 tx_pool->producer_index = 0;
499 }
500
501 return 0;
502}
503
661a2622
NF		 504static void release_error_buffers(struct ibmvnic_adapter *adapter)
505{
506 struct device *dev = &adapter->vdev->dev;
507 struct ibmvnic_error_buff *error_buff, *tmp;
508 unsigned long flags;
509
510 spin_lock_irqsave(&adapter->error_list_lock, flags);
511 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
512 list_del(&error_buff->list);
513 dma_unmap_single(dev, error_buff->dma, error_buff->len,
514 DMA_FROM_DEVICE);
515 kfree(error_buff->buff);
516 kfree(error_buff);
517 }
518 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
519}
520
a57a5d25 521static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 522{
523 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 524 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 525 struct device *dev = &adapter->vdev->dev;
032c5e82 526
bd0b6723
JA		 527 do {
528 if (adapter->renegotiate) {
529 adapter->renegotiate = false;
b510888f 530 release_sub_crqs(adapter);
bd0b6723
JA		 531
532 reinit_completion(&adapter->init_done);
533 send_cap_queries(adapter);
534 if (!wait_for_completion_timeout(&adapter->init_done,
535 timeout)) {
536 dev_err(dev, "Capabilities query timeout\n");
537 return -1;
538 }
539 }
540
541 reinit_completion(&adapter->init_done);
542 send_login(adapter);
543 if (!wait_for_completion_timeout(&adapter->init_done,
544 timeout)) {
545 dev_err(dev, "Login timeout\n");
546 return -1;
547 }
548 } while (adapter->renegotiate);
549
a57a5d25
JA		 550 return 0;
551}
552
1b8955ee
NF		 553static void release_resources(struct ibmvnic_adapter *adapter)
554{
c7bac00b
NF		 555 int i;
556
1b8955ee
NF		 557 release_tx_pools(adapter);
558 release_rx_pools(adapter);
559
1b8955ee 560 release_stats_token(adapter);
661a2622 561 release_error_buffers(adapter);
c7bac00b
NF		 562
563 if (adapter->napi) {
564 for (i = 0; i < adapter->req_rx_queues; i++) {
565 if (&adapter->napi[i])
566 netif_napi_del(&adapter->napi[i]);
567 }
568 }
1b8955ee
NF		 569}
570
53da09e9
NF		 571static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
572{
573 struct net_device *netdev = adapter->netdev;
574 unsigned long timeout = msecs_to_jiffies(30000);
575 union ibmvnic_crq crq;
576 bool resend;
577 int rc;
578
53da09e9
NF		 579 netdev_err(netdev, "setting link state %d\n", link_state);
580 memset(&crq, 0, sizeof(crq));
581 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
582 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
583 crq.logical_link_state.link_state = link_state;
584
585 do {
586 resend = false;
587
588 reinit_completion(&adapter->init_done);
589 rc = ibmvnic_send_crq(adapter, &crq);
590 if (rc) {
591 netdev_err(netdev, "Failed to set link state\n");
592 return rc;
593 }
594
595 if (!wait_for_completion_timeout(&adapter->init_done,
596 timeout)) {
597 netdev_err(netdev, "timeout setting link state\n");
598 return -1;
599 }
600
601 if (adapter->init_done_rc == 1) {
602 /* Partuial success, delay and re-send */
603 mdelay(1000);
604 resend = true;
605 }
606 } while (resend);
607
608 return 0;
609}
610
7f3c6e6b
TF		 611static int set_real_num_queues(struct net_device *netdev)
612{
613 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
614 int rc;
615
616 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
617 if (rc) {
618 netdev_err(netdev, "failed to set the number of tx queues\n");
619 return rc;
620 }
621
622 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
623 if (rc)
624 netdev_err(netdev, "failed to set the number of rx queues\n");
625
626 return rc;
627}
628
bfc32f29 629static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 630{
bfc32f29
NF		 631 struct net_device *netdev = adapter->netdev;
632 int i, rc;
a57a5d25 633
7f3c6e6b
TF		 634 rc = set_real_num_queues(netdev);
635 if (rc)
636 return rc;
bd0b6723
JA		 637
638 rc = init_sub_crq_irqs(adapter);
639 if (rc) {
bfc32f29 640 netdev_err(netdev, "failed to initialize sub crq irqs\n");
bd0b6723
JA		 641 return -1;
642 }
643
5d5e84eb
NF		 644 rc = init_stats_token(adapter);
645 if (rc)
646 return rc;
647
032c5e82
TF		 648 adapter->map_id = 1;
649 adapter->napi = kcalloc(adapter->req_rx_queues,
650 sizeof(struct napi_struct), GFP_KERNEL);
651 if (!adapter->napi)
bfc32f29
NF		 652 return -ENOMEM;
653
032c5e82
TF		 654 for (i = 0; i < adapter->req_rx_queues; i++) {
655 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
656 NAPI_POLL_WEIGHT);
032c5e82 657 }
032c5e82 658
032c5e82 659 send_map_query(adapter);
0ffe2cb7
NF		 660
661 rc = init_rx_pools(netdev);
662 if (rc)
bfc32f29 663 return rc;
032c5e82 664
c657e32c 665 rc = init_tx_pools(netdev);
bfc32f29
NF		 666 return rc;
667}
668
ed651a10 669static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 670{
671 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 672 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 673 int i, rc;
674
90c8014c 675 adapter->state = VNIC_OPENING;
032c5e82
TF		 676 replenish_pools(adapter);
677
bfc32f29
NF		 678 for (i = 0; i < adapter->req_rx_queues; i++)
679 napi_enable(&adapter->napi[i]);
680
032c5e82
TF		 681 /* We're ready to receive frames, enable the sub-crq interrupts and
682 * set the logical link state to up
683 */
ed651a10
NF		 684 for (i = 0; i < adapter->req_rx_queues; i++) {
685 if (prev_state == VNIC_CLOSED)
686 enable_irq(adapter->rx_scrq[i]->irq);
687 else
688 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
689 }
032c5e82 690
ed651a10
NF		 691 for (i = 0; i < adapter->req_tx_queues; i++) {
692 if (prev_state == VNIC_CLOSED)
693 enable_irq(adapter->tx_scrq[i]->irq);
694 else
695 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
696 }
032c5e82 697
53da09e9 698 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 699 if (rc) {
700 for (i = 0; i < adapter->req_rx_queues; i++)
701 napi_disable(&adapter->napi[i]);
702 release_resources(adapter);
ed651a10 703 return rc;
bfc32f29 704 }
032c5e82 705
ed651a10
NF		 706 netif_tx_start_all_queues(netdev);
707
708 if (prev_state == VNIC_CLOSED) {
709 for (i = 0; i < adapter->req_rx_queues; i++)
710 napi_schedule(&adapter->napi[i]);
711 }
712
713 adapter->state = VNIC_OPEN;
714 return rc;
715}
716
717static int ibmvnic_open(struct net_device *netdev)
718{
719 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
720 int rc;
721
722 mutex_lock(&adapter->reset_lock);
723
724 if (adapter->state != VNIC_CLOSED) {
725 rc = ibmvnic_login(netdev);
726 if (rc) {
727 mutex_unlock(&adapter->reset_lock);
728 return rc;
729 }
730
731 rc = init_resources(adapter);
732 if (rc) {
733 netdev_err(netdev, "failed to initialize resources\n");
734 release_resources(adapter);
735 mutex_unlock(&adapter->reset_lock);
736 return rc;
737 }
738 }
739
740 rc = __ibmvnic_open(netdev);
741 mutex_unlock(&adapter->reset_lock);
742
bfc32f29 743 return rc;
032c5e82
TF		 744}
745
b41b83e9
NF		 746static void clean_tx_pools(struct ibmvnic_adapter *adapter)
747{
748 struct ibmvnic_tx_pool *tx_pool;
749 u64 tx_entries;
750 int tx_scrqs;
751 int i, j;
752
753 if (!adapter->tx_pool)
754 return;
755
756 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
757 tx_entries = adapter->req_tx_entries_per_subcrq;
758
759 /* Free any remaining skbs in the tx buffer pools */
760 for (i = 0; i < tx_scrqs; i++) {
761 tx_pool = &adapter->tx_pool[i];
762 if (!tx_pool)
763 continue;
764
765 for (j = 0; j < tx_entries; j++) {
766 if (tx_pool->tx_buff[j].skb) {
767 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
768 tx_pool->tx_buff[j].skb = NULL;
769 }
770 }
771 }
772}
773
ed651a10 774static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 775{
776 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 777 int rc = 0;
ea5509f5
JA		 778 int i;
779
90c8014c 780 adapter->state = VNIC_CLOSING;
ed651a10 781 netif_tx_stop_all_queues(netdev);
b41b83e9 782
3ca19932
NF		 783 if (adapter->napi) {
784 for (i = 0; i < adapter->req_rx_queues; i++)
785 napi_disable(&adapter->napi[i]);
786 }
ea5509f5 787
46293b94
NF		 788 clean_tx_pools(adapter);
789
790 if (adapter->tx_scrq) {
791 for (i = 0; i < adapter->req_tx_queues; i++)
792 if (adapter->tx_scrq[i]->irq)
793 disable_irq(adapter->tx_scrq[i]->irq);
794 }
795
53da09e9 796 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 797 if (rc)
798 return rc;
799
800 if (adapter->rx_scrq) {
801 for (i = 0; i < adapter->req_rx_queues; i++) {
802 int retries = 10;
803
804 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
805 retries--;
806 mdelay(100);
807
808 if (retries == 0)
809 break;
810 }
811
812 if (adapter->rx_scrq[i]->irq)
813 disable_irq(adapter->rx_scrq[i]->irq);
814 }
815 }
ea5509f5 816
90c8014c 817 adapter->state = VNIC_CLOSED;
53da09e9 818 return rc;
032c5e82
TF		 819}
820
ed651a10
NF		 821static int ibmvnic_close(struct net_device *netdev)
822{
823 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
824 int rc;
825
826 mutex_lock(&adapter->reset_lock);
827 rc = __ibmvnic_close(netdev);
828 mutex_unlock(&adapter->reset_lock);
829
830 return rc;
831}
832
ad7775dc
TF		 833/**
834 * build_hdr_data - creates L2/L3/L4 header data buffer
835 * @hdr_field - bitfield determining needed headers
836 * @skb - socket buffer
837 * @hdr_len - array of header lengths
838 * @tot_len - total length of data
839 *
840 * Reads hdr_field to determine which headers are needed by firmware.
841 * Builds a buffer containing these headers. Saves individual header
842 * lengths and total buffer length to be used to build descriptors.
843 */
844static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
845 int *hdr_len, u8 *hdr_data)
846{
847 int len = 0;
848 u8 *hdr;
849
850 hdr_len[0] = sizeof(struct ethhdr);
851
852 if (skb->protocol == htons(ETH_P_IP)) {
853 hdr_len[1] = ip_hdr(skb)->ihl * 4;
854 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
855 hdr_len[2] = tcp_hdrlen(skb);
856 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
857 hdr_len[2] = sizeof(struct udphdr);
858 } else if (skb->protocol == htons(ETH_P_IPV6)) {
859 hdr_len[1] = sizeof(struct ipv6hdr);
860 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
861 hdr_len[2] = tcp_hdrlen(skb);
862 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
863 hdr_len[2] = sizeof(struct udphdr);
864 }
865
866 memset(hdr_data, 0, 120);
867 if ((hdr_field >> 6) & 1) {
868 hdr = skb_mac_header(skb);
869 memcpy(hdr_data, hdr, hdr_len[0]);
870 len += hdr_len[0];
871 }
872
873 if ((hdr_field >> 5) & 1) {
874 hdr = skb_network_header(skb);
875 memcpy(hdr_data + len, hdr, hdr_len[1]);
876 len += hdr_len[1];
877 }
878
879 if ((hdr_field >> 4) & 1) {
880 hdr = skb_transport_header(skb);
881 memcpy(hdr_data + len, hdr, hdr_len[2]);
882 len += hdr_len[2];
883 }
884 return len;
885}
886
887/**
888 * create_hdr_descs - create header and header extension descriptors
889 * @hdr_field - bitfield determining needed headers
890 * @data - buffer containing header data
891 * @len - length of data buffer
892 * @hdr_len - array of individual header lengths
893 * @scrq_arr - descriptor array
894 *
895 * Creates header and, if needed, header extension descriptors and
896 * places them in a descriptor array, scrq_arr
897 */
898
899static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
900 union sub_crq *scrq_arr)
901{
902 union sub_crq hdr_desc;
903 int tmp_len = len;
904 u8 *data, *cur;
905 int tmp;
906
907 while (tmp_len > 0) {
908 cur = hdr_data + len - tmp_len;
909
910 memset(&hdr_desc, 0, sizeof(hdr_desc));
911 if (cur != hdr_data) {
912 data = hdr_desc.hdr_ext.data;
913 tmp = tmp_len > 29 ? 29 : tmp_len;
914 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
915 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
916 hdr_desc.hdr_ext.len = tmp;
917 } else {
918 data = hdr_desc.hdr.data;
919 tmp = tmp_len > 24 ? 24 : tmp_len;
920 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
921 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
922 hdr_desc.hdr.len = tmp;
923 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
924 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
925 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
926 hdr_desc.hdr.flag = hdr_field << 1;
927 }
928 memcpy(data, cur, tmp);
929 tmp_len -= tmp;
930 *scrq_arr = hdr_desc;
931 scrq_arr++;
932 }
933}
934
935/**
936 * build_hdr_descs_arr - build a header descriptor array
937 * @skb - socket buffer
938 * @num_entries - number of descriptors to be sent
939 * @subcrq - first TX descriptor
940 * @hdr_field - bit field determining which headers will be sent
941 *
942 * This function will build a TX descriptor array with applicable
943 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
944 */
945
946static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
947 int *num_entries, u8 hdr_field)
948{
949 int hdr_len[3] = {0, 0, 0};
950 int tot_len, len;
951 u8 *hdr_data = txbuff->hdr_data;
952
953 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
954 txbuff->hdr_data);
955 len = tot_len;
956 len -= 24;
957 if (len > 0)
958 num_entries += len % 29 ? len / 29 + 1 : len / 29;
959 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
960 txbuff->indir_arr + 1);
961}
962
032c5e82
TF		 963static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
964{
965 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
966 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 967 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 968 struct device *dev = &adapter->vdev->dev;
969 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 970 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 971 struct ibmvnic_tx_pool *tx_pool;
972 unsigned int tx_send_failed = 0;
973 unsigned int tx_map_failed = 0;
974 unsigned int tx_dropped = 0;
975 unsigned int tx_packets = 0;
976 unsigned int tx_bytes = 0;
977 dma_addr_t data_dma_addr;
978 struct netdev_queue *txq;
032c5e82
TF		 979 unsigned long lpar_rc;
980 union sub_crq tx_crq;
981 unsigned int offset;
ad7775dc 982 int num_entries = 1;
032c5e82
TF		 983 unsigned char *dst;
984 u64 *handle_array;
985 int index = 0;
986 int ret = 0;
987
ed651a10 988 if (adapter->resetting) {
7f5b0308
TF		 989 if (!netif_subqueue_stopped(netdev, skb))
990 netif_stop_subqueue(netdev, queue_num);
991 dev_kfree_skb_any(skb);
992
032c5e82
TF		 993 tx_send_failed++;
994 tx_dropped++;
7f5b0308 995 ret = NETDEV_TX_OK;
032c5e82
TF		 996 goto out;
997 }
998
161b8a81
NF		 999 tx_pool = &adapter->tx_pool[queue_num];
1000 tx_scrq = adapter->tx_scrq[queue_num];
1001 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1002 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1003 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1004
032c5e82
TF		 1005 index = tx_pool->free_map[tx_pool->consumer_index];
1006 offset = index * adapter->req_mtu;
1007 dst = tx_pool->long_term_buff.buff + offset;
1008 memset(dst, 0, adapter->req_mtu);
1009 skb_copy_from_linear_data(skb, dst, skb->len);
1010 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1011
1012 tx_pool->consumer_index =
1013 (tx_pool->consumer_index + 1) %
068d9f90 1014 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1015
1016 tx_buff = &tx_pool->tx_buff[index];
1017 tx_buff->skb = skb;
1018 tx_buff->data_dma[0] = data_dma_addr;
1019 tx_buff->data_len[0] = skb->len;
1020 tx_buff->index = index;
1021 tx_buff->pool_index = queue_num;
1022 tx_buff->last_frag = true;
032c5e82
TF		 1023
1024 memset(&tx_crq, 0, sizeof(tx_crq));
1025 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1026 tx_crq.v1.type = IBMVNIC_TX_DESC;
1027 tx_crq.v1.n_crq_elem = 1;
1028 tx_crq.v1.n_sge = 1;
1029 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1030 tx_crq.v1.correlator = cpu_to_be32(index);
1031 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1032 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1033 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1034
1035 if (adapter->vlan_header_insertion) {
1036 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1037 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1038 }
1039
1040 if (skb->protocol == htons(ETH_P_IP)) {
1041 if (ip_hdr(skb)->version == 4)
1042 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1043 else if (ip_hdr(skb)->version == 6)
1044 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1045
1046 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1047 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1048 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1049 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1050 }
1051
ad7775dc 1052 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1053 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1054 hdrs += 2;
1055 }
1056 /* determine if l2/3/4 headers are sent to firmware */
1057 if ((*hdrs >> 7) & 1 &&
1058 (skb->protocol == htons(ETH_P_IP) ||
1059 skb->protocol == htons(ETH_P_IPV6))) {
1060 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1061 tx_crq.v1.n_crq_elem = num_entries;
1062 tx_buff->indir_arr[0] = tx_crq;
1063 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1064 sizeof(tx_buff->indir_arr),
1065 DMA_TO_DEVICE);
1066 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1067 dev_kfree_skb_any(skb);
1068 tx_buff->skb = NULL;
ad7775dc
TF		 1069 if (!firmware_has_feature(FW_FEATURE_CMO))
1070 dev_err(dev, "tx: unable to map descriptor array\n");
1071 tx_map_failed++;
1072 tx_dropped++;
7f5b0308 1073 ret = NETDEV_TX_OK;
ad7775dc
TF		 1074 goto out;
1075 }
498cd8e4 1076 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1077 (u64)tx_buff->indir_dma,
1078 (u64)num_entries);
1079 } else {
498cd8e4
JA		 1080 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1081 &tx_crq);
ad7775dc 1082 }
032c5e82
TF		 1083 if (lpar_rc != H_SUCCESS) {
1084 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1085
1086 if (tx_pool->consumer_index == 0)
1087 tx_pool->consumer_index =
068d9f90 1088 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1089 else
1090 tx_pool->consumer_index--;
1091
7f5b0308
TF		 1092 dev_kfree_skb_any(skb);
1093 tx_buff->skb = NULL;
1094
1095 if (lpar_rc == H_CLOSED)
1096 netif_stop_subqueue(netdev, queue_num);
1097
032c5e82
TF		 1098 tx_send_failed++;
1099 tx_dropped++;
7f5b0308 1100 ret = NETDEV_TX_OK;
032c5e82
TF		 1101 goto out;
1102 }
142c0ac4 1103
58c8c0c0
BK		 1104 if (atomic_inc_return(&tx_scrq->used)
1105 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1106 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1107 netif_stop_subqueue(netdev, queue_num);
1108 }
1109
032c5e82
TF		 1110 tx_packets++;
1111 tx_bytes += skb->len;
1112 txq->trans_start = jiffies;
1113 ret = NETDEV_TX_OK;
1114
1115out:
1116 netdev->stats.tx_dropped += tx_dropped;
1117 netdev->stats.tx_bytes += tx_bytes;
1118 netdev->stats.tx_packets += tx_packets;
1119 adapter->tx_send_failed += tx_send_failed;
1120 adapter->tx_map_failed += tx_map_failed;
1121
1122 return ret;
1123}
1124
1125static void ibmvnic_set_multi(struct net_device *netdev)
1126{
1127 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1128 struct netdev_hw_addr *ha;
1129 union ibmvnic_crq crq;
1130
1131 memset(&crq, 0, sizeof(crq));
1132 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1133 crq.request_capability.cmd = REQUEST_CAPABILITY;
1134
1135 if (netdev->flags & IFF_PROMISC) {
1136 if (!adapter->promisc_supported)
1137 return;
1138 } else {
1139 if (netdev->flags & IFF_ALLMULTI) {
1140 /* Accept all multicast */
1141 memset(&crq, 0, sizeof(crq));
1142 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1143 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1144 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1145 ibmvnic_send_crq(adapter, &crq);
1146 } else if (netdev_mc_empty(netdev)) {
1147 /* Reject all multicast */
1148 memset(&crq, 0, sizeof(crq));
1149 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1150 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1151 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1152 ibmvnic_send_crq(adapter, &crq);
1153 } else {
1154 /* Accept one or more multicast(s) */
1155 netdev_for_each_mc_addr(ha, netdev) {
1156 memset(&crq, 0, sizeof(crq));
1157 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1158 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1159 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1160 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1161 ha->addr);
1162 ibmvnic_send_crq(adapter, &crq);
1163 }
1164 }
1165 }
1166}
1167
1168static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1169{
1170 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1171 struct sockaddr *addr = p;
1172 union ibmvnic_crq crq;
1173
1174 if (!is_valid_ether_addr(addr->sa_data))
1175 return -EADDRNOTAVAIL;
1176
1177 memset(&crq, 0, sizeof(crq));
1178 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1179 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1180 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1181 ibmvnic_send_crq(adapter, &crq);
1182 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1183 return 0;
1184}
1185
ed651a10
NF		 1186/**
1187 * do_reset returns zero if we are able to keep processing reset events, or
1188 * non-zero if we hit a fatal error and must halt.
1189 */
1190static int do_reset(struct ibmvnic_adapter *adapter,
1191 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1192{
ed651a10
NF		 1193 struct net_device *netdev = adapter->netdev;
1194 int i, rc;
1195
1196 netif_carrier_off(netdev);
1197 adapter->reset_reason = rwi->reset_reason;
1198
1199 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1200 rc = ibmvnic_reenable_crq_queue(adapter);
1201 if (rc)
1202 return 0;
1203 }
1204
1205 rc = __ibmvnic_close(netdev);
1206 if (rc)
1207 return rc;
1208
1209 /* remove the closed state so when we call open it appears
1210 * we are coming from the probed state.
1211 */
1212 adapter->state = VNIC_PROBED;
032c5e82 1213
ed651a10 1214 release_resources(adapter);
032c5e82 1215 release_sub_crqs(adapter);
ed651a10
NF		 1216 release_crq_queue(adapter);
1217
1218 rc = ibmvnic_init(adapter);
032c5e82 1219 if (rc)
ed651a10
NF		 1220 return 0;
1221
1222 /* If the adapter was in PROBE state prior to the reset, exit here. */
1223 if (reset_state == VNIC_PROBED)
1224 return 0;
1225
1226 rc = ibmvnic_login(netdev);
1227 if (rc) {
1228 adapter->state = VNIC_PROBED;
1229 return 0;
1230 }
1231
1232 rtnl_lock();
1233 rc = init_resources(adapter);
1234 rtnl_unlock();
1235 if (rc)
1236 return rc;
1237
1238 if (reset_state == VNIC_CLOSED)
1239 return 0;
1240
1241 rc = __ibmvnic_open(netdev);
1242 if (rc) {
1243 if (list_empty(&adapter->rwi_list))
1244 adapter->state = VNIC_CLOSED;
1245 else
1246 adapter->state = reset_state;
1247
1248 return 0;
1249 }
1250
1251 netif_carrier_on(netdev);
1252
1253 /* kick napi */
1254 for (i = 0; i < adapter->req_rx_queues; i++)
1255 napi_schedule(&adapter->napi[i]);
1256
1257 return 0;
1258}
1259
1260static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1261{
1262 struct ibmvnic_rwi *rwi;
1263
1264 mutex_lock(&adapter->rwi_lock);
1265
1266 if (!list_empty(&adapter->rwi_list)) {
1267 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1268 list);
1269 list_del(&rwi->list);
1270 } else {
1271 rwi = NULL;
1272 }
1273
1274 mutex_unlock(&adapter->rwi_lock);
1275 return rwi;
1276}
1277
1278static void free_all_rwi(struct ibmvnic_adapter *adapter)
1279{
1280 struct ibmvnic_rwi *rwi;
1281
1282 rwi = get_next_rwi(adapter);
1283 while (rwi) {
1284 kfree(rwi);
1285 rwi = get_next_rwi(adapter);
1286 }
1287}
1288
1289static void __ibmvnic_reset(struct work_struct *work)
1290{
1291 struct ibmvnic_rwi *rwi;
1292 struct ibmvnic_adapter *adapter;
1293 struct net_device *netdev;
1294 u32 reset_state;
1295 int rc;
1296
1297 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1298 netdev = adapter->netdev;
1299
1300 mutex_lock(&adapter->reset_lock);
1301 adapter->resetting = true;
1302 reset_state = adapter->state;
1303
1304 rwi = get_next_rwi(adapter);
1305 while (rwi) {
1306 rc = do_reset(adapter, rwi, reset_state);
1307 kfree(rwi);
1308 if (rc)
1309 break;
1310
1311 rwi = get_next_rwi(adapter);
1312 }
1313
1314 if (rc) {
1315 free_all_rwi(adapter);
6d0af07d 1316 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1317 return;
1318 }
1319
1320 adapter->resetting = false;
1321 mutex_unlock(&adapter->reset_lock);
1322}
1323
1324static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1325 enum ibmvnic_reset_reason reason)
1326{
1327 struct ibmvnic_rwi *rwi, *tmp;
1328 struct net_device *netdev = adapter->netdev;
1329 struct list_head *entry;
1330
1331 if (adapter->state == VNIC_REMOVING ||
1332 adapter->state == VNIC_REMOVED) {
1333 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1334 return;
1335 }
1336
1337 mutex_lock(&adapter->rwi_lock);
1338
1339 list_for_each(entry, &adapter->rwi_list) {
1340 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1341 if (tmp->reset_reason == reason) {
1342 netdev_err(netdev, "Matching reset found, skipping\n");
1343 mutex_unlock(&adapter->rwi_lock);
1344 return;
1345 }
1346 }
1347
1348 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1349 if (!rwi) {
1350 mutex_unlock(&adapter->rwi_lock);
1351 ibmvnic_close(netdev);
1352 return;
1353 }
1354
1355 rwi->reset_reason = reason;
1356 list_add_tail(&rwi->list, &adapter->rwi_list);
1357 mutex_unlock(&adapter->rwi_lock);
1358 schedule_work(&adapter->ibmvnic_reset);
1359}
1360
1361static void ibmvnic_tx_timeout(struct net_device *dev)
1362{
1363 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1364
1365 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1366}
1367
1368static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1369 struct ibmvnic_rx_buff *rx_buff)
1370{
1371 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1372
1373 rx_buff->skb = NULL;
1374
1375 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1376 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1377
1378 atomic_dec(&pool->available);
1379}
1380
1381static int ibmvnic_poll(struct napi_struct *napi, int budget)
1382{
1383 struct net_device *netdev = napi->dev;
1384 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1385 int scrq_num = (int)(napi - adapter->napi);
1386 int frames_processed = 0;
1387restart_poll:
1388 while (frames_processed < budget) {
1389 struct sk_buff *skb;
1390 struct ibmvnic_rx_buff *rx_buff;
1391 union sub_crq *next;
1392 u32 length;
1393 u16 offset;
1394 u8 flags = 0;
1395
1396 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1397 break;
1398 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1399 rx_buff =
1400 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1401 rx_comp.correlator);
1402 /* do error checking */
1403 if (next->rx_comp.rc) {
1404 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1405 /* free the entry */
1406 next->rx_comp.first = 0;
1407 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1408 continue;
032c5e82
TF		 1409 }
1410
1411 length = be32_to_cpu(next->rx_comp.len);
1412 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1413 flags = next->rx_comp.flags;
1414 skb = rx_buff->skb;
1415 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1416 length);
6052d5e2
MFV		 1417
1418 /* VLAN Header has been stripped by the system firmware and
1419 * needs to be inserted by the driver
1420 */
1421 if (adapter->rx_vlan_header_insertion &&
1422 (flags & IBMVNIC_VLAN_STRIPPED))
1423 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1424 ntohs(next->rx_comp.vlan_tci));
1425
032c5e82
TF		 1426 /* free the entry */
1427 next->rx_comp.first = 0;
1428 remove_buff_from_pool(adapter, rx_buff);
1429
1430 skb_put(skb, length);
1431 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1432 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1433
1434 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1435 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1436 skb->ip_summed = CHECKSUM_UNNECESSARY;
1437 }
1438
1439 length = skb->len;
1440 napi_gro_receive(napi, skb); /* send it up */
1441 netdev->stats.rx_packets++;
1442 netdev->stats.rx_bytes += length;
1443 frames_processed++;
1444 }
498cd8e4 1445 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1446
1447 if (frames_processed < budget) {
1448 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1449 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1450 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1451 napi_reschedule(napi)) {
1452 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1453 goto restart_poll;
1454 }
1455 }
1456 return frames_processed;
1457}
1458
1459#ifdef CONFIG_NET_POLL_CONTROLLER
1460static void ibmvnic_netpoll_controller(struct net_device *dev)
1461{
1462 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1463 int i;
1464
1465 replenish_pools(netdev_priv(dev));
1466 for (i = 0; i < adapter->req_rx_queues; i++)
1467 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1468 adapter->rx_scrq[i]);
1469}
1470#endif
1471
1472static const struct net_device_ops ibmvnic_netdev_ops = {
1473 .ndo_open = ibmvnic_open,
1474 .ndo_stop = ibmvnic_close,
1475 .ndo_start_xmit = ibmvnic_xmit,
1476 .ndo_set_rx_mode = ibmvnic_set_multi,
1477 .ndo_set_mac_address = ibmvnic_set_mac,
1478 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1479 .ndo_tx_timeout = ibmvnic_tx_timeout,
1480#ifdef CONFIG_NET_POLL_CONTROLLER
1481 .ndo_poll_controller = ibmvnic_netpoll_controller,
1482#endif
1483};
1484
1485/* ethtool functions */
1486
8a43379f
PR		 1487static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1488 struct ethtool_link_ksettings *cmd)
032c5e82 1489{
8a43379f
PR		 1490 u32 supported, advertising;
1491
1492 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1493 SUPPORTED_FIBRE);
8a43379f 1494 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1495 ADVERTISED_FIBRE);
8a43379f
PR		 1496 cmd->base.speed = SPEED_1000;
1497 cmd->base.duplex = DUPLEX_FULL;
1498 cmd->base.port = PORT_FIBRE;
1499 cmd->base.phy_address = 0;
1500 cmd->base.autoneg = AUTONEG_ENABLE;
1501
1502 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1503 supported);
1504 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1505 advertising);
1506
032c5e82
TF		 1507 return 0;
1508}
1509
1510static void ibmvnic_get_drvinfo(struct net_device *dev,
1511 struct ethtool_drvinfo *info)
1512{
1513 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1514 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1515}
1516
1517static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1518{
1519 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1520
1521 return adapter->msg_enable;
1522}
1523
1524static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1525{
1526 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1527
1528 adapter->msg_enable = data;
1529}
1530
1531static u32 ibmvnic_get_link(struct net_device *netdev)
1532{
1533 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1534
1535 /* Don't need to send a query because we request a logical link up at
1536 * init and then we wait for link state indications
1537 */
1538 return adapter->logical_link_state;
1539}
1540
1541static void ibmvnic_get_ringparam(struct net_device *netdev,
1542 struct ethtool_ringparam *ring)
1543{
1544 ring->rx_max_pending = 0;
1545 ring->tx_max_pending = 0;
1546 ring->rx_mini_max_pending = 0;
1547 ring->rx_jumbo_max_pending = 0;
1548 ring->rx_pending = 0;
1549 ring->tx_pending = 0;
1550 ring->rx_mini_pending = 0;
1551 ring->rx_jumbo_pending = 0;
1552}
1553
1554static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1555{
1556 int i;
1557
1558 if (stringset != ETH_SS_STATS)
1559 return;
1560
1561 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1562 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1563}
1564
1565static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1566{
1567 switch (sset) {
1568 case ETH_SS_STATS:
1569 return ARRAY_SIZE(ibmvnic_stats);
1570 default:
1571 return -EOPNOTSUPP;
1572 }
1573}
1574
1575static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1576 struct ethtool_stats *stats, u64 *data)
1577{
1578 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1579 union ibmvnic_crq crq;
1580 int i;
1581
1582 memset(&crq, 0, sizeof(crq));
1583 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1584 crq.request_statistics.cmd = REQUEST_STATISTICS;
1585 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1586 crq.request_statistics.len =
1587 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1588
1589 /* Wait for data to be written */
1590 init_completion(&adapter->stats_done);
db5d0b59 1591 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1592 wait_for_completion(&adapter->stats_done);
1593
1594 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1595 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1596}
1597
1598static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1599 .get_drvinfo = ibmvnic_get_drvinfo,
1600 .get_msglevel = ibmvnic_get_msglevel,
1601 .set_msglevel = ibmvnic_set_msglevel,
1602 .get_link = ibmvnic_get_link,
1603 .get_ringparam = ibmvnic_get_ringparam,
1604 .get_strings = ibmvnic_get_strings,
1605 .get_sset_count = ibmvnic_get_sset_count,
1606 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1607 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1608};
1609
1610/* Routines for managing CRQs/sCRQs */
1611
1612static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1613 struct ibmvnic_sub_crq_queue *scrq)
1614{
1615 struct device *dev = &adapter->vdev->dev;
1616 long rc;
1617
1618 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1619
1620 /* Close the sub-crqs */
1621 do {
1622 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1623 adapter->vdev->unit_address,
1624 scrq->crq_num);
1625 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1626
ffa73855
TF		 1627 if (rc) {
1628 netdev_err(adapter->netdev,
1629 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1630 scrq->crq_num, rc);
1631 }
1632
032c5e82
TF		 1633 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1634 DMA_BIDIRECTIONAL);
1635 free_pages((unsigned long)scrq->msgs, 2);
1636 kfree(scrq);
1637}
1638
1639static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1640 *adapter)
1641{
1642 struct device *dev = &adapter->vdev->dev;
1643 struct ibmvnic_sub_crq_queue *scrq;
1644 int rc;
1645
1bb3c739 1646 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1647 if (!scrq)
1648 return NULL;
1649
7f7adc50 1650 scrq->msgs =
1bb3c739 1651 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1652 if (!scrq->msgs) {
1653 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1654 goto zero_page_failed;
1655 }
1656
1657 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1658 DMA_BIDIRECTIONAL);
1659 if (dma_mapping_error(dev, scrq->msg_token)) {
1660 dev_warn(dev, "Couldn't map crq queue messages page\n");
1661 goto map_failed;
1662 }
1663
1664 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1665 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1666
1667 if (rc == H_RESOURCE)
1668 rc = ibmvnic_reset_crq(adapter);
1669
1670 if (rc == H_CLOSED) {
1671 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1672 } else if (rc) {
1673 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1674 goto reg_failed;
1675 }
1676
032c5e82
TF		 1677 scrq->adapter = adapter;
1678 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1679 spin_lock_init(&scrq->lock);
1680
1681 netdev_dbg(adapter->netdev,
1682 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1683 scrq->crq_num, scrq->hw_irq, scrq->irq);
1684
1685 return scrq;
1686
032c5e82
TF		 1687reg_failed:
1688 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1689 DMA_BIDIRECTIONAL);
1690map_failed:
1691 free_pages((unsigned long)scrq->msgs, 2);
1692zero_page_failed:
1693 kfree(scrq);
1694
1695 return NULL;
1696}
1697
1698static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1699{
1700 int i;
1701
1702 if (adapter->tx_scrq) {
b510888f
NF		 1703 for (i = 0; i < adapter->req_tx_queues; i++) {
1704 if (!adapter->tx_scrq[i])
1705 continue;
1706
1707 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1708 free_irq(adapter->tx_scrq[i]->irq,
1709 adapter->tx_scrq[i]);
88eb98a0 1710 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1711 adapter->tx_scrq[i]->irq = 0;
032c5e82 1712 }
b510888f
NF		 1713
1714 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1715 }
1716
9501df3c 1717 kfree(adapter->tx_scrq);
032c5e82
TF		 1718 adapter->tx_scrq = NULL;
1719 }
1720
1721 if (adapter->rx_scrq) {
b510888f
NF		 1722 for (i = 0; i < adapter->req_rx_queues; i++) {
1723 if (!adapter->rx_scrq[i])
1724 continue;
1725
1726 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1727 free_irq(adapter->rx_scrq[i]->irq,
1728 adapter->rx_scrq[i]);
88eb98a0 1729 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1730 adapter->rx_scrq[i]->irq = 0;
032c5e82 1731 }
032c5e82 1732
b510888f
NF		 1733 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1734 }
ea22d51a 1735
b510888f 1736 kfree(adapter->rx_scrq);
ea22d51a
TF		 1737 adapter->rx_scrq = NULL;
1738 }
ea22d51a
TF		 1739}
1740
032c5e82
TF		 1741static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1742 struct ibmvnic_sub_crq_queue *scrq)
1743{
1744 struct device *dev = &adapter->vdev->dev;
1745 unsigned long rc;
1746
1747 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1748 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1749 if (rc)
1750 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1751 scrq->hw_irq, rc);
1752 return rc;
1753}
1754
1755static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1756 struct ibmvnic_sub_crq_queue *scrq)
1757{
1758 struct device *dev = &adapter->vdev->dev;
1759 unsigned long rc;
1760
1761 if (scrq->hw_irq > 0x100000000ULL) {
1762 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1763 return 1;
1764 }
1765
1766 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1767 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1768 if (rc)
1769 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1770 scrq->hw_irq, rc);
1771 return rc;
1772}
1773
1774static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1775 struct ibmvnic_sub_crq_queue *scrq)
1776{
1777 struct device *dev = &adapter->vdev->dev;
1778 struct ibmvnic_tx_buff *txbuff;
1779 union sub_crq *next;
1780 int index;
1781 int i, j;
ad7775dc 1782 u8 first;
032c5e82
TF		 1783
1784restart_loop:
1785 while (pending_scrq(adapter, scrq)) {
1786 unsigned int pool = scrq->pool_index;
1787
1788 next = ibmvnic_next_scrq(adapter, scrq);
1789 for (i = 0; i < next->tx_comp.num_comps; i++) {
1790 if (next->tx_comp.rcs[i]) {
1791 dev_err(dev, "tx error %x\n",
1792 next->tx_comp.rcs[i]);
1793 continue;
1794 }
1795 index = be32_to_cpu(next->tx_comp.correlators[i]);
1796 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1797
1798 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1799 if (!txbuff->data_dma[j])
1800 continue;
1801
1802 txbuff->data_dma[j] = 0;
032c5e82 1803 }
ad7775dc
TF		 1804 /* if sub_crq was sent indirectly */
1805 first = txbuff->indir_arr[0].generic.first;
1806 if (first == IBMVNIC_CRQ_CMD) {
1807 dma_unmap_single(dev, txbuff->indir_dma,
1808 sizeof(txbuff->indir_arr),
1809 DMA_TO_DEVICE);
1810 }
032c5e82 1811
142c0ac4 1812 if (txbuff->last_frag) {
032c5e82 1813 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 1814 txbuff->skb = NULL;
142c0ac4 1815 }
032c5e82
TF		 1816
1817 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1818 producer_index] = index;
1819 adapter->tx_pool[pool].producer_index =
1820 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1821 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1822 }
1823 /* remove tx_comp scrq*/
1824 next->tx_comp.first = 0;
7c3e7de3
NF		 1825
1826 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1827 (adapter->req_tx_entries_per_subcrq / 2) &&
1828 __netif_subqueue_stopped(adapter->netdev,
1829 scrq->pool_index)) {
1830 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
1831 netdev_info(adapter->netdev, "Started queue %d\n",
1832 scrq->pool_index);
1833 }
032c5e82
TF		 1834 }
1835
1836 enable_scrq_irq(adapter, scrq);
1837
1838 if (pending_scrq(adapter, scrq)) {
1839 disable_scrq_irq(adapter, scrq);
1840 goto restart_loop;
1841 }
1842
1843 return 0;
1844}
1845
1846static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1847{
1848 struct ibmvnic_sub_crq_queue *scrq = instance;
1849 struct ibmvnic_adapter *adapter = scrq->adapter;
1850
1851 disable_scrq_irq(adapter, scrq);
1852 ibmvnic_complete_tx(adapter, scrq);
1853
1854 return IRQ_HANDLED;
1855}
1856
1857static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1858{
1859 struct ibmvnic_sub_crq_queue *scrq = instance;
1860 struct ibmvnic_adapter *adapter = scrq->adapter;
1861
1862 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1863 disable_scrq_irq(adapter, scrq);
1864 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1865 }
1866
1867 return IRQ_HANDLED;
1868}
1869
ea22d51a
TF		 1870static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1871{
1872 struct device *dev = &adapter->vdev->dev;
1873 struct ibmvnic_sub_crq_queue *scrq;
1874 int i = 0, j = 0;
1875 int rc = 0;
1876
1877 for (i = 0; i < adapter->req_tx_queues; i++) {
1878 scrq = adapter->tx_scrq[i];
1879 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1880
99c1790e 1881 if (!scrq->irq) {
ea22d51a
TF		 1882 rc = -EINVAL;
1883 dev_err(dev, "Error mapping irq\n");
1884 goto req_tx_irq_failed;
1885 }
1886
1887 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1888 0, "ibmvnic_tx", scrq);
1889
1890 if (rc) {
1891 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1892 scrq->irq, rc);
1893 irq_dispose_mapping(scrq->irq);
1894 goto req_rx_irq_failed;
1895 }
1896 }
1897
1898 for (i = 0; i < adapter->req_rx_queues; i++) {
1899 scrq = adapter->rx_scrq[i];
1900 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1901 if (!scrq->irq) {
ea22d51a
TF		 1902 rc = -EINVAL;
1903 dev_err(dev, "Error mapping irq\n");
1904 goto req_rx_irq_failed;
1905 }
1906 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1907 0, "ibmvnic_rx", scrq);
1908 if (rc) {
1909 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1910 scrq->irq, rc);
1911 irq_dispose_mapping(scrq->irq);
1912 goto req_rx_irq_failed;
1913 }
1914 }
1915 return rc;
1916
1917req_rx_irq_failed:
8bf371e6 1918 for (j = 0; j < i; j++) {
ea22d51a
TF		 1919 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1920 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1921 }
ea22d51a
TF		 1922 i = adapter->req_tx_queues;
1923req_tx_irq_failed:
8bf371e6 1924 for (j = 0; j < i; j++) {
ea22d51a
TF		 1925 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1926 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1927 }
b510888f 1928 release_sub_crqs(adapter);
ea22d51a
TF		 1929 return rc;
1930}
1931
d346b9bc 1932static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 1933{
1934 struct device *dev = &adapter->vdev->dev;
1935 struct ibmvnic_sub_crq_queue **allqueues;
1936 int registered_queues = 0;
032c5e82
TF		 1937 int total_queues;
1938 int more = 0;
ea22d51a 1939 int i;
032c5e82 1940
032c5e82
TF		 1941 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1942
1bb3c739 1943 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 1944 if (!allqueues)
d346b9bc 1945 return -1;
032c5e82
TF		 1946
1947 for (i = 0; i < total_queues; i++) {
1948 allqueues[i] = init_sub_crq_queue(adapter);
1949 if (!allqueues[i]) {
1950 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1951 break;
1952 }
1953 registered_queues++;
1954 }
1955
1956 /* Make sure we were able to register the minimum number of queues */
1957 if (registered_queues <
1958 adapter->min_tx_queues + adapter->min_rx_queues) {
1959 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1960 goto tx_failed;
1961 }
1962
1963 /* Distribute the failed allocated queues*/
1964 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1965 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1966 switch (i % 3) {
1967 case 0:
1968 if (adapter->req_rx_queues > adapter->min_rx_queues)
1969 adapter->req_rx_queues--;
1970 else
1971 more++;
1972 break;
1973 case 1:
1974 if (adapter->req_tx_queues > adapter->min_tx_queues)
1975 adapter->req_tx_queues--;
1976 else
1977 more++;
1978 break;
1979 }
1980 }
1981
1982 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 1983 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 1984 if (!adapter->tx_scrq)
1985 goto tx_failed;
1986
1987 for (i = 0; i < adapter->req_tx_queues; i++) {
1988 adapter->tx_scrq[i] = allqueues[i];
1989 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 1990 }
1991
1992 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 1993 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 1994 if (!adapter->rx_scrq)
1995 goto rx_failed;
1996
1997 for (i = 0; i < adapter->req_rx_queues; i++) {
1998 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1999 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2000 }
2001
d346b9bc
NF		 2002 kfree(allqueues);
2003 return 0;
2004
2005rx_failed:
2006 kfree(adapter->tx_scrq);
2007 adapter->tx_scrq = NULL;
2008tx_failed:
2009 for (i = 0; i < registered_queues; i++)
2010 release_sub_crq_queue(adapter, allqueues[i]);
2011 kfree(allqueues);
2012 return -1;
2013}
2014
2015static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2016{
2017 struct device *dev = &adapter->vdev->dev;
2018 union ibmvnic_crq crq;
d346b9bc
NF		 2019
2020 if (!retry) {
2021 /* Sub-CRQ entries are 32 byte long */
2022 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2023
2024 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2025 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2026 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2027 return;
2028 }
2029
2030 /* Get the minimum between the queried max and the entries
2031 * that fit in our PAGE_SIZE
2032 */
2033 adapter->req_tx_entries_per_subcrq =
2034 adapter->max_tx_entries_per_subcrq > entries_page ?
2035 entries_page : adapter->max_tx_entries_per_subcrq;
2036 adapter->req_rx_add_entries_per_subcrq =
2037 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2038 entries_page : adapter->max_rx_add_entries_per_subcrq;
2039
2040 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2041 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2042 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2043
2044 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2045 }
2046
032c5e82
TF		 2047 memset(&crq, 0, sizeof(crq));
2048 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2049 crq.request_capability.cmd = REQUEST_CAPABILITY;
2050
2051 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2052 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2053 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2054 ibmvnic_send_crq(adapter, &crq);
2055
2056 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2057 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2058 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2059 ibmvnic_send_crq(adapter, &crq);
2060
2061 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2062 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2063 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2064 ibmvnic_send_crq(adapter, &crq);
2065
2066 crq.request_capability.capability =
2067 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2068 crq.request_capability.number =
de89e854 2069 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2070 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2071 ibmvnic_send_crq(adapter, &crq);
2072
2073 crq.request_capability.capability =
2074 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2075 crq.request_capability.number =
de89e854 2076 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2077 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2078 ibmvnic_send_crq(adapter, &crq);
2079
2080 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2081 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2082 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2083 ibmvnic_send_crq(adapter, &crq);
2084
2085 if (adapter->netdev->flags & IFF_PROMISC) {
2086 if (adapter->promisc_supported) {
2087 crq.request_capability.capability =
2088 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2089 crq.request_capability.number = cpu_to_be64(1);
901e040a 2090 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2091 ibmvnic_send_crq(adapter, &crq);
2092 }
2093 } else {
2094 crq.request_capability.capability =
2095 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2096 crq.request_capability.number = cpu_to_be64(0);
901e040a 2097 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2098 ibmvnic_send_crq(adapter, &crq);
2099 }
032c5e82
TF		 2100}
2101
2102static int pending_scrq(struct ibmvnic_adapter *adapter,
2103 struct ibmvnic_sub_crq_queue *scrq)
2104{
2105 union sub_crq *entry = &scrq->msgs[scrq->cur];
2106
90c8014c
NF		 2107 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2108 adapter->state == VNIC_CLOSING)
032c5e82
TF		 2109 return 1;
2110 else
2111 return 0;
2112}
2113
2114static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2115 struct ibmvnic_sub_crq_queue *scrq)
2116{
2117 union sub_crq *entry;
2118 unsigned long flags;
2119
2120 spin_lock_irqsave(&scrq->lock, flags);
2121 entry = &scrq->msgs[scrq->cur];
2122 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2123 if (++scrq->cur == scrq->size)
2124 scrq->cur = 0;
2125 } else {
2126 entry = NULL;
2127 }
2128 spin_unlock_irqrestore(&scrq->lock, flags);
2129
2130 return entry;
2131}
2132
2133static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2134{
2135 struct ibmvnic_crq_queue *queue = &adapter->crq;
2136 union ibmvnic_crq *crq;
2137
2138 crq = &queue->msgs[queue->cur];
2139 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2140 if (++queue->cur == queue->size)
2141 queue->cur = 0;
2142 } else {
2143 crq = NULL;
2144 }
2145
2146 return crq;
2147}
2148
2149static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2150 union sub_crq *sub_crq)
2151{
2152 unsigned int ua = adapter->vdev->unit_address;
2153 struct device *dev = &adapter->vdev->dev;
2154 u64 *u64_crq = (u64 *)sub_crq;
2155 int rc;
2156
2157 netdev_dbg(adapter->netdev,
2158 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2159 (unsigned long int)cpu_to_be64(remote_handle),
2160 (unsigned long int)cpu_to_be64(u64_crq[0]),
2161 (unsigned long int)cpu_to_be64(u64_crq[1]),
2162 (unsigned long int)cpu_to_be64(u64_crq[2]),
2163 (unsigned long int)cpu_to_be64(u64_crq[3]));
2164
2165 /* Make sure the hypervisor sees the complete request */
2166 mb();
2167
2168 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2169 cpu_to_be64(remote_handle),
2170 cpu_to_be64(u64_crq[0]),
2171 cpu_to_be64(u64_crq[1]),
2172 cpu_to_be64(u64_crq[2]),
2173 cpu_to_be64(u64_crq[3]));
2174
2175 if (rc) {
2176 if (rc == H_CLOSED)
2177 dev_warn(dev, "CRQ Queue closed\n");
2178 dev_err(dev, "Send error (rc=%d)\n", rc);
2179 }
2180
2181 return rc;
2182}
2183
ad7775dc
TF		 2184static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2185 u64 remote_handle, u64 ioba, u64 num_entries)
2186{
2187 unsigned int ua = adapter->vdev->unit_address;
2188 struct device *dev = &adapter->vdev->dev;
2189 int rc;
2190
2191 /* Make sure the hypervisor sees the complete request */
2192 mb();
2193 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2194 cpu_to_be64(remote_handle),
2195 ioba, num_entries);
2196
2197 if (rc) {
2198 if (rc == H_CLOSED)
2199 dev_warn(dev, "CRQ Queue closed\n");
2200 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2201 }
2202
2203 return rc;
2204}
2205
032c5e82
TF		 2206static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2207 union ibmvnic_crq *crq)
2208{
2209 unsigned int ua = adapter->vdev->unit_address;
2210 struct device *dev = &adapter->vdev->dev;
2211 u64 *u64_crq = (u64 *)crq;
2212 int rc;
2213
2214 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2215 (unsigned long int)cpu_to_be64(u64_crq[0]),
2216 (unsigned long int)cpu_to_be64(u64_crq[1]));
2217
2218 /* Make sure the hypervisor sees the complete request */
2219 mb();
2220
2221 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2222 cpu_to_be64(u64_crq[0]),
2223 cpu_to_be64(u64_crq[1]));
2224
2225 if (rc) {
2226 if (rc == H_CLOSED)
2227 dev_warn(dev, "CRQ Queue closed\n");
2228 dev_warn(dev, "Send error (rc=%d)\n", rc);
2229 }
2230
2231 return rc;
2232}
2233
2234static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2235{
2236 union ibmvnic_crq crq;
2237
2238 memset(&crq, 0, sizeof(crq));
2239 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2240 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2241 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2242
2243 return ibmvnic_send_crq(adapter, &crq);
2244}
2245
032c5e82
TF		 2246static int send_version_xchg(struct ibmvnic_adapter *adapter)
2247{
2248 union ibmvnic_crq crq;
2249
2250 memset(&crq, 0, sizeof(crq));
2251 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2252 crq.version_exchange.cmd = VERSION_EXCHANGE;
2253 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2254
2255 return ibmvnic_send_crq(adapter, &crq);
2256}
2257
2258static void send_login(struct ibmvnic_adapter *adapter)
2259{
2260 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2261 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2262 struct device *dev = &adapter->vdev->dev;
2263 dma_addr_t rsp_buffer_token;
2264 dma_addr_t buffer_token;
2265 size_t rsp_buffer_size;
2266 union ibmvnic_crq crq;
032c5e82
TF		 2267 size_t buffer_size;
2268 __be64 *tx_list_p;
2269 __be64 *rx_list_p;
2270 int i;
2271
2272 buffer_size =
2273 sizeof(struct ibmvnic_login_buffer) +
2274 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2275
2276 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2277 if (!login_buffer)
2278 goto buf_alloc_failed;
2279
2280 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2281 DMA_TO_DEVICE);
2282 if (dma_mapping_error(dev, buffer_token)) {
2283 dev_err(dev, "Couldn't map login buffer\n");
2284 goto buf_map_failed;
2285 }
2286
498cd8e4
JA		 2287 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2288 sizeof(u64) * adapter->req_tx_queues +
2289 sizeof(u64) * adapter->req_rx_queues +
2290 sizeof(u64) * adapter->req_rx_queues +
2291 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2292
2293 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2294 if (!login_rsp_buffer)
2295 goto buf_rsp_alloc_failed;
2296
2297 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2298 rsp_buffer_size, DMA_FROM_DEVICE);
2299 if (dma_mapping_error(dev, rsp_buffer_token)) {
2300 dev_err(dev, "Couldn't map login rsp buffer\n");
2301 goto buf_rsp_map_failed;
2302 }
661a2622 2303
032c5e82
TF		 2304 adapter->login_buf = login_buffer;
2305 adapter->login_buf_token = buffer_token;
2306 adapter->login_buf_sz = buffer_size;
2307 adapter->login_rsp_buf = login_rsp_buffer;
2308 adapter->login_rsp_buf_token = rsp_buffer_token;
2309 adapter->login_rsp_buf_sz = rsp_buffer_size;
2310
2311 login_buffer->len = cpu_to_be32(buffer_size);
2312 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2313 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2314 login_buffer->off_txcomp_subcrqs =
2315 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2316 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2317 login_buffer->off_rxcomp_subcrqs =
2318 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2319 sizeof(u64) * adapter->req_tx_queues);
2320 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2321 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2322
2323 tx_list_p = (__be64 *)((char *)login_buffer +
2324 sizeof(struct ibmvnic_login_buffer));
2325 rx_list_p = (__be64 *)((char *)login_buffer +
2326 sizeof(struct ibmvnic_login_buffer) +
2327 sizeof(u64) * adapter->req_tx_queues);
2328
2329 for (i = 0; i < adapter->req_tx_queues; i++) {
2330 if (adapter->tx_scrq[i]) {
2331 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2332 crq_num);
2333 }
2334 }
2335
2336 for (i = 0; i < adapter->req_rx_queues; i++) {
2337 if (adapter->rx_scrq[i]) {
2338 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2339 crq_num);
2340 }
2341 }
2342
2343 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2344 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2345 netdev_dbg(adapter->netdev, "%016lx\n",
2346 ((unsigned long int *)(adapter->login_buf))[i]);
2347 }
2348
2349 memset(&crq, 0, sizeof(crq));
2350 crq.login.first = IBMVNIC_CRQ_CMD;
2351 crq.login.cmd = LOGIN;
2352 crq.login.ioba = cpu_to_be32(buffer_token);
2353 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2354 ibmvnic_send_crq(adapter, &crq);
2355
2356 return;
2357
032c5e82
TF		 2358buf_rsp_map_failed:
2359 kfree(login_rsp_buffer);
2360buf_rsp_alloc_failed:
2361 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2362buf_map_failed:
2363 kfree(login_buffer);
2364buf_alloc_failed:
2365 return;
2366}
2367
2368static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2369 u32 len, u8 map_id)
2370{
2371 union ibmvnic_crq crq;
2372
2373 memset(&crq, 0, sizeof(crq));
2374 crq.request_map.first = IBMVNIC_CRQ_CMD;
2375 crq.request_map.cmd = REQUEST_MAP;
2376 crq.request_map.map_id = map_id;
2377 crq.request_map.ioba = cpu_to_be32(addr);
2378 crq.request_map.len = cpu_to_be32(len);
2379 ibmvnic_send_crq(adapter, &crq);
2380}
2381
2382static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2383{
2384 union ibmvnic_crq crq;
2385
2386 memset(&crq, 0, sizeof(crq));
2387 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2388 crq.request_unmap.cmd = REQUEST_UNMAP;
2389 crq.request_unmap.map_id = map_id;
2390 ibmvnic_send_crq(adapter, &crq);
2391}
2392
2393static void send_map_query(struct ibmvnic_adapter *adapter)
2394{
2395 union ibmvnic_crq crq;
2396
2397 memset(&crq, 0, sizeof(crq));
2398 crq.query_map.first = IBMVNIC_CRQ_CMD;
2399 crq.query_map.cmd = QUERY_MAP;
2400 ibmvnic_send_crq(adapter, &crq);
2401}
2402
2403/* Send a series of CRQs requesting various capabilities of the VNIC server */
2404static void send_cap_queries(struct ibmvnic_adapter *adapter)
2405{
2406 union ibmvnic_crq crq;
2407
901e040a 2408 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2409 memset(&crq, 0, sizeof(crq));
2410 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2411 crq.query_capability.cmd = QUERY_CAPABILITY;
2412
2413 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2414 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2415 ibmvnic_send_crq(adapter, &crq);
2416
2417 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2418 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2419 ibmvnic_send_crq(adapter, &crq);
2420
2421 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2422 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2423 ibmvnic_send_crq(adapter, &crq);
2424
2425 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2426 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2427 ibmvnic_send_crq(adapter, &crq);
2428
2429 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2430 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2431 ibmvnic_send_crq(adapter, &crq);
2432
2433 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2434 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2435 ibmvnic_send_crq(adapter, &crq);
2436
2437 crq.query_capability.capability =
2438 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2439 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2440 ibmvnic_send_crq(adapter, &crq);
2441
2442 crq.query_capability.capability =
2443 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2444 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2445 ibmvnic_send_crq(adapter, &crq);
2446
2447 crq.query_capability.capability =
2448 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2449 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2450 ibmvnic_send_crq(adapter, &crq);
2451
2452 crq.query_capability.capability =
2453 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2454 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2455 ibmvnic_send_crq(adapter, &crq);
2456
2457 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2458 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2459 ibmvnic_send_crq(adapter, &crq);
2460
2461 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2462 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2463 ibmvnic_send_crq(adapter, &crq);
2464
2465 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2466 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2467 ibmvnic_send_crq(adapter, &crq);
2468
2469 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2470 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2471 ibmvnic_send_crq(adapter, &crq);
2472
2473 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2474 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2475 ibmvnic_send_crq(adapter, &crq);
2476
2477 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2478 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2479 ibmvnic_send_crq(adapter, &crq);
2480
6052d5e2
MFV		 2481 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2482 atomic_inc(&adapter->running_cap_crqs);
2483 ibmvnic_send_crq(adapter, &crq);
2484
032c5e82 2485 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2486 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2487 ibmvnic_send_crq(adapter, &crq);
2488
2489 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2490 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2491 ibmvnic_send_crq(adapter, &crq);
2492
2493 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2494 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2495 ibmvnic_send_crq(adapter, &crq);
2496
2497 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2498 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2499 ibmvnic_send_crq(adapter, &crq);
2500
2501 crq.query_capability.capability =
2502 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2503 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2504 ibmvnic_send_crq(adapter, &crq);
2505
2506 crq.query_capability.capability =
2507 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2508 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2509 ibmvnic_send_crq(adapter, &crq);
2510
2511 crq.query_capability.capability =
2512 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2513 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2514 ibmvnic_send_crq(adapter, &crq);
2515
2516 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2517 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2518 ibmvnic_send_crq(adapter, &crq);
2519}
2520
2521static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2522{
2523 struct device *dev = &adapter->vdev->dev;
2524 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2525 union ibmvnic_crq crq;
2526 int i;
2527
2528 dma_unmap_single(dev, adapter->ip_offload_tok,
2529 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2530
2531 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2532 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2533 netdev_dbg(adapter->netdev, "%016lx\n",
2534 ((unsigned long int *)(buf))[i]);
2535
2536 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2537 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2538 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2539 buf->tcp_ipv4_chksum);
2540 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2541 buf->tcp_ipv6_chksum);
2542 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2543 buf->udp_ipv4_chksum);
2544 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2545 buf->udp_ipv6_chksum);
2546 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2547 buf->large_tx_ipv4);
2548 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2549 buf->large_tx_ipv6);
2550 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2551 buf->large_rx_ipv4);
2552 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2553 buf->large_rx_ipv6);
2554 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2555 buf->max_ipv4_header_size);
2556 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2557 buf->max_ipv6_header_size);
2558 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2559 buf->max_tcp_header_size);
2560 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2561 buf->max_udp_header_size);
2562 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2563 buf->max_large_tx_size);
2564 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2565 buf->max_large_rx_size);
2566 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2567 buf->ipv6_extension_header);
2568 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2569 buf->tcp_pseudosum_req);
2570 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2571 buf->num_ipv6_ext_headers);
2572 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2573 buf->off_ipv6_ext_headers);
2574
2575 adapter->ip_offload_ctrl_tok =
2576 dma_map_single(dev, &adapter->ip_offload_ctrl,
2577 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2578
2579 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2580 dev_err(dev, "Couldn't map ip offload control buffer\n");
2581 return;
2582 }
2583
2584 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2585 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2586 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2587 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2588 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2589
2590 /* large_tx/rx disabled for now, additional features needed */
2591 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2592 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2593 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2594 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2595
2596 adapter->netdev->features = NETIF_F_GSO;
2597
2598 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2599 adapter->netdev->features |= NETIF_F_IP_CSUM;
2600
2601 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2602 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2603
9be02cdf
TF		 2604 if ((adapter->netdev->features &
2605 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2606 adapter->netdev->features |= NETIF_F_RXCSUM;
2607
032c5e82
TF		 2608 memset(&crq, 0, sizeof(crq));
2609 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2610 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2611 crq.control_ip_offload.len =
2612 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2613 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2614 ibmvnic_send_crq(adapter, &crq);
2615}
2616
2617static void handle_error_info_rsp(union ibmvnic_crq *crq,
2618 struct ibmvnic_adapter *adapter)
2619{
2620 struct device *dev = &adapter->vdev->dev;
96183182 2621 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2622 unsigned long flags;
2623 bool found = false;
2624 int i;
2625
2626 if (!crq->request_error_rsp.rc.code) {
2627 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2628 crq->request_error_rsp.rc.code);
2629 return;
2630 }
2631
2632 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2633 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2634 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2635 found = true;
2636 list_del(&error_buff->list);
2637 break;
2638 }
2639 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2640
2641 if (!found) {
2642 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2643 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2644 return;
2645 }
2646
2647 dev_err(dev, "Detailed info for error id %x:",
75224c93 2648 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2649
2650 for (i = 0; i < error_buff->len; i++) {
2651 pr_cont("%02x", (int)error_buff->buff[i]);
2652 if (i % 8 == 7)
2653 pr_cont(" ");
2654 }
2655 pr_cont("\n");
2656
2657 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2658 DMA_FROM_DEVICE);
2659 kfree(error_buff->buff);
2660 kfree(error_buff);
2661}
2662
2f9de9ba
NF		 2663static void request_error_information(struct ibmvnic_adapter *adapter,
2664 union ibmvnic_crq *err_crq)
032c5e82 2665{
032c5e82 2666 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2667 struct net_device *netdev = adapter->netdev;
032c5e82 2668 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2669 unsigned long timeout = msecs_to_jiffies(30000);
2670 union ibmvnic_crq crq;
032c5e82 2671 unsigned long flags;
2f9de9ba 2672 int rc, detail_len;
032c5e82
TF		 2673
2674 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2675 if (!error_buff)
2676 return;
2677
2f9de9ba 2678 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2679 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2680 if (!error_buff->buff) {
2681 kfree(error_buff);
2682 return;
2683 }
2684
2685 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2686 DMA_FROM_DEVICE);
2687 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2688 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2689 kfree(error_buff->buff);
2690 kfree(error_buff);
2691 return;
2692 }
2693
032c5e82 2694 error_buff->len = detail_len;
2f9de9ba 2695 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2696
2697 spin_lock_irqsave(&adapter->error_list_lock, flags);
2698 list_add_tail(&error_buff->list, &adapter->errors);
2699 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2700
2f9de9ba
NF		 2701 memset(&crq, 0, sizeof(crq));
2702 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2703 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2704 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2705 crq.request_error_info.len = cpu_to_be32(detail_len);
2706 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2707
2708 rc = ibmvnic_send_crq(adapter, &crq);
2709 if (rc) {
2710 netdev_err(netdev, "failed to request error information\n");
2711 goto err_info_fail;
2712 }
2713
2714 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2715 netdev_err(netdev, "timeout waiting for error information\n");
2716 goto err_info_fail;
2717 }
2718
2719 return;
2720
2721err_info_fail:
2722 spin_lock_irqsave(&adapter->error_list_lock, flags);
2723 list_del(&error_buff->list);
2724 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2725
2726 kfree(error_buff->buff);
2727 kfree(error_buff);
2728}
2729
2730static void handle_error_indication(union ibmvnic_crq *crq,
2731 struct ibmvnic_adapter *adapter)
2732{
2733 struct device *dev = &adapter->vdev->dev;
2734
2735 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2736 crq->error_indication.flags
2737 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2738 be32_to_cpu(crq->error_indication.error_id),
2739 be16_to_cpu(crq->error_indication.error_cause));
2740
2741 if (be32_to_cpu(crq->error_indication.error_id))
2742 request_error_information(adapter, crq);
ed651a10
NF		 2743
2744 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2745 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 2746}
2747
2748static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2749 struct ibmvnic_adapter *adapter)
2750{
2751 struct net_device *netdev = adapter->netdev;
2752 struct device *dev = &adapter->vdev->dev;
2753 long rc;
2754
2755 rc = crq->change_mac_addr_rsp.rc.code;
2756 if (rc) {
2757 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2758 return;
2759 }
2760 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2761 ETH_ALEN);
2762}
2763
2764static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2765 struct ibmvnic_adapter *adapter)
2766{
2767 struct device *dev = &adapter->vdev->dev;
2768 u64 *req_value;
2769 char *name;
2770
901e040a 2771 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2772 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2773 case REQ_TX_QUEUES:
2774 req_value = &adapter->req_tx_queues;
2775 name = "tx";
2776 break;
2777 case REQ_RX_QUEUES:
2778 req_value = &adapter->req_rx_queues;
2779 name = "rx";
2780 break;
2781 case REQ_RX_ADD_QUEUES:
2782 req_value = &adapter->req_rx_add_queues;
2783 name = "rx_add";
2784 break;
2785 case REQ_TX_ENTRIES_PER_SUBCRQ:
2786 req_value = &adapter->req_tx_entries_per_subcrq;
2787 name = "tx_entries_per_subcrq";
2788 break;
2789 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2790 req_value = &adapter->req_rx_add_entries_per_subcrq;
2791 name = "rx_add_entries_per_subcrq";
2792 break;
2793 case REQ_MTU:
2794 req_value = &adapter->req_mtu;
2795 name = "mtu";
2796 break;
2797 case PROMISC_REQUESTED:
2798 req_value = &adapter->promisc;
2799 name = "promisc";
2800 break;
2801 default:
2802 dev_err(dev, "Got invalid cap request rsp %d\n",
2803 crq->request_capability.capability);
2804 return;
2805 }
2806
2807 switch (crq->request_capability_rsp.rc.code) {
2808 case SUCCESS:
2809 break;
2810 case PARTIALSUCCESS:
2811 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2812 *req_value,
28f4d165 2813 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2814 number), name);
b510888f 2815 release_sub_crqs(adapter);
28f4d165 2816 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 2817 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 2818 return;
2819 default:
2820 dev_err(dev, "Error %d in request cap rsp\n",
2821 crq->request_capability_rsp.rc.code);
2822 return;
2823 }
2824
2825 /* Done receiving requested capabilities, query IP offload support */
901e040a 2826 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2827 union ibmvnic_crq newcrq;
2828 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2829 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2830 &adapter->ip_offload_buf;
2831
249168ad 2832 adapter->wait_capability = false;
032c5e82
TF		 2833 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2834 buf_sz,
2835 DMA_FROM_DEVICE);
2836
2837 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2838 if (!firmware_has_feature(FW_FEATURE_CMO))
2839 dev_err(dev, "Couldn't map offload buffer\n");
2840 return;
2841 }
2842
2843 memset(&newcrq, 0, sizeof(newcrq));
2844 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2845 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2846 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2847 newcrq.query_ip_offload.ioba =
2848 cpu_to_be32(adapter->ip_offload_tok);
2849
2850 ibmvnic_send_crq(adapter, &newcrq);
2851 }
2852}
2853
2854static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2855 struct ibmvnic_adapter *adapter)
2856{
2857 struct device *dev = &adapter->vdev->dev;
2858 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2859 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 2860 int i;
2861
2862 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2863 DMA_BIDIRECTIONAL);
2864 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2865 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2866
498cd8e4
JA		 2867 /* If the number of queues requested can't be allocated by the
2868 * server, the login response will return with code 1. We will need
2869 * to resend the login buffer with fewer queues requested.
2870 */
2871 if (login_rsp_crq->generic.rc.code) {
2872 adapter->renegotiate = true;
2873 complete(&adapter->init_done);
2874 return 0;
2875 }
2876
032c5e82
TF		 2877 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2878 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2879 netdev_dbg(adapter->netdev, "%016lx\n",
2880 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2881 }
2882
2883 /* Sanity checks */
2884 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2885 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2886 adapter->req_rx_add_queues !=
2887 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2888 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2889 ibmvnic_remove(adapter->vdev);
2890 return -EIO;
2891 }
2892 complete(&adapter->init_done);
2893
032c5e82
TF		 2894 return 0;
2895}
2896
2897static void handle_request_map_rsp(union ibmvnic_crq *crq,
2898 struct ibmvnic_adapter *adapter)
2899{
2900 struct device *dev = &adapter->vdev->dev;
2901 u8 map_id = crq->request_map_rsp.map_id;
2902 int tx_subcrqs;
2903 int rx_subcrqs;
2904 long rc;
2905 int i;
2906
2907 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2908 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2909
2910 rc = crq->request_map_rsp.rc.code;
2911 if (rc) {
2912 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2913 adapter->map_id--;
2914 /* need to find and zero tx/rx_pool map_id */
2915 for (i = 0; i < tx_subcrqs; i++) {
2916 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2917 adapter->tx_pool[i].long_term_buff.map_id = 0;
2918 }
2919 for (i = 0; i < rx_subcrqs; i++) {
2920 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2921 adapter->rx_pool[i].long_term_buff.map_id = 0;
2922 }
2923 }
2924 complete(&adapter->fw_done);
2925}
2926
2927static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2928 struct ibmvnic_adapter *adapter)
2929{
2930 struct device *dev = &adapter->vdev->dev;
2931 long rc;
2932
2933 rc = crq->request_unmap_rsp.rc.code;
2934 if (rc)
2935 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2936}
2937
2938static void handle_query_map_rsp(union ibmvnic_crq *crq,
2939 struct ibmvnic_adapter *adapter)
2940{
2941 struct net_device *netdev = adapter->netdev;
2942 struct device *dev = &adapter->vdev->dev;
2943 long rc;
2944
2945 rc = crq->query_map_rsp.rc.code;
2946 if (rc) {
2947 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2948 return;
2949 }
2950 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2951 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2952 crq->query_map_rsp.free_pages);
2953}
2954
2955static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2956 struct ibmvnic_adapter *adapter)
2957{
2958 struct net_device *netdev = adapter->netdev;
2959 struct device *dev = &adapter->vdev->dev;
2960 long rc;
2961
901e040a 2962 atomic_dec(&adapter->running_cap_crqs);
032c5e82 2963 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 2964 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 2965 rc = crq->query_capability.rc.code;
2966 if (rc) {
2967 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2968 goto out;
2969 }
2970
2971 switch (be16_to_cpu(crq->query_capability.capability)) {
2972 case MIN_TX_QUEUES:
2973 adapter->min_tx_queues =
de89e854 2974 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2975 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2976 adapter->min_tx_queues);
2977 break;
2978 case MIN_RX_QUEUES:
2979 adapter->min_rx_queues =
de89e854 2980 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2981 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2982 adapter->min_rx_queues);
2983 break;
2984 case MIN_RX_ADD_QUEUES:
2985 adapter->min_rx_add_queues =
de89e854 2986 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2987 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2988 adapter->min_rx_add_queues);
2989 break;
2990 case MAX_TX_QUEUES:
2991 adapter->max_tx_queues =
de89e854 2992 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2993 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2994 adapter->max_tx_queues);
2995 break;
2996 case MAX_RX_QUEUES:
2997 adapter->max_rx_queues =
de89e854 2998 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2999 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3000 adapter->max_rx_queues);
3001 break;
3002 case MAX_RX_ADD_QUEUES:
3003 adapter->max_rx_add_queues =
de89e854 3004 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3005 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3006 adapter->max_rx_add_queues);
3007 break;
3008 case MIN_TX_ENTRIES_PER_SUBCRQ:
3009 adapter->min_tx_entries_per_subcrq =
de89e854 3010 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3011 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3012 adapter->min_tx_entries_per_subcrq);
3013 break;
3014 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3015 adapter->min_rx_add_entries_per_subcrq =
de89e854 3016 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3017 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3018 adapter->min_rx_add_entries_per_subcrq);
3019 break;
3020 case MAX_TX_ENTRIES_PER_SUBCRQ:
3021 adapter->max_tx_entries_per_subcrq =
de89e854 3022 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3023 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3024 adapter->max_tx_entries_per_subcrq);
3025 break;
3026 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3027 adapter->max_rx_add_entries_per_subcrq =
de89e854 3028 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3029 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3030 adapter->max_rx_add_entries_per_subcrq);
3031 break;
3032 case TCP_IP_OFFLOAD:
3033 adapter->tcp_ip_offload =
de89e854 3034 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3035 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3036 adapter->tcp_ip_offload);
3037 break;
3038 case PROMISC_SUPPORTED:
3039 adapter->promisc_supported =
de89e854 3040 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3041 netdev_dbg(netdev, "promisc_supported = %lld\n",
3042 adapter->promisc_supported);
3043 break;
3044 case MIN_MTU:
de89e854 3045 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3046 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3047 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3048 break;
3049 case MAX_MTU:
de89e854 3050 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3051 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3052 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3053 break;
3054 case MAX_MULTICAST_FILTERS:
3055 adapter->max_multicast_filters =
de89e854 3056 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3057 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3058 adapter->max_multicast_filters);
3059 break;
3060 case VLAN_HEADER_INSERTION:
3061 adapter->vlan_header_insertion =
de89e854 3062 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3063 if (adapter->vlan_header_insertion)
3064 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3065 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3066 adapter->vlan_header_insertion);
3067 break;
6052d5e2
MFV		 3068 case RX_VLAN_HEADER_INSERTION:
3069 adapter->rx_vlan_header_insertion =
3070 be64_to_cpu(crq->query_capability.number);
3071 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3072 adapter->rx_vlan_header_insertion);
3073 break;
032c5e82
TF		 3074 case MAX_TX_SG_ENTRIES:
3075 adapter->max_tx_sg_entries =
de89e854 3076 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3077 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3078 adapter->max_tx_sg_entries);
3079 break;
3080 case RX_SG_SUPPORTED:
3081 adapter->rx_sg_supported =
de89e854 3082 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3083 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3084 adapter->rx_sg_supported);
3085 break;
3086 case OPT_TX_COMP_SUB_QUEUES:
3087 adapter->opt_tx_comp_sub_queues =
de89e854 3088 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3089 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3090 adapter->opt_tx_comp_sub_queues);
3091 break;
3092 case OPT_RX_COMP_QUEUES:
3093 adapter->opt_rx_comp_queues =
de89e854 3094 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3095 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3096 adapter->opt_rx_comp_queues);
3097 break;
3098 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3099 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3100 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3101 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3102 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3103 break;
3104 case OPT_TX_ENTRIES_PER_SUBCRQ:
3105 adapter->opt_tx_entries_per_subcrq =
de89e854 3106 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3107 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3108 adapter->opt_tx_entries_per_subcrq);
3109 break;
3110 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3111 adapter->opt_rxba_entries_per_subcrq =
de89e854 3112 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3113 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3114 adapter->opt_rxba_entries_per_subcrq);
3115 break;
3116 case TX_RX_DESC_REQ:
3117 adapter->tx_rx_desc_req = crq->query_capability.number;
3118 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3119 adapter->tx_rx_desc_req);
3120 break;
3121
3122 default:
3123 netdev_err(netdev, "Got invalid cap rsp %d\n",
3124 crq->query_capability.capability);
3125 }
3126
3127out:
249168ad
TF		 3128 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3129 adapter->wait_capability = false;
d346b9bc 3130 ibmvnic_send_req_caps(adapter, 0);
249168ad 3131 }
032c5e82
TF		 3132}
3133
032c5e82
TF		 3134static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3135 struct ibmvnic_adapter *adapter)
3136{
3137 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3138 struct net_device *netdev = adapter->netdev;
3139 struct device *dev = &adapter->vdev->dev;
993a82b0 3140 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3141 long rc;
3142
3143 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3144 (unsigned long int)cpu_to_be64(u64_crq[0]),
3145 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3146 switch (gen_crq->first) {
3147 case IBMVNIC_CRQ_INIT_RSP:
3148 switch (gen_crq->cmd) {
3149 case IBMVNIC_CRQ_INIT:
3150 dev_info(dev, "Partner initialized\n");
032c5e82
TF		 3151 break;
3152 case IBMVNIC_CRQ_INIT_COMPLETE:
3153 dev_info(dev, "Partner initialization complete\n");
3154 send_version_xchg(adapter);
3155 break;
3156 default:
3157 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3158 }
3159 return;
3160 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3161 netif_carrier_off(netdev);
032c5e82 3162 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3163 dev_info(dev, "Migrated, re-enabling adapter\n");
3164 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3165 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3166 dev_info(dev, "Backing device failover detected\n");
ed651a10 3167 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3168 } else {
3169 /* The adapter lost the connection */
3170 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3171 gen_crq->cmd);
ed651a10 3172 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3173 }
3174 return;
3175 case IBMVNIC_CRQ_CMD_RSP:
3176 break;
3177 default:
3178 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3179 gen_crq->first);
3180 return;
3181 }
3182
3183 switch (gen_crq->cmd) {
3184 case VERSION_EXCHANGE_RSP:
3185 rc = crq->version_exchange_rsp.rc.code;
3186 if (rc) {
3187 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3188 break;
3189 }
3190 dev_info(dev, "Partner protocol version is %d\n",
3191 crq->version_exchange_rsp.version);
3192 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3193 ibmvnic_version)
3194 ibmvnic_version =
3195 be16_to_cpu(crq->version_exchange_rsp.version);
3196 send_cap_queries(adapter);
3197 break;
3198 case QUERY_CAPABILITY_RSP:
3199 handle_query_cap_rsp(crq, adapter);
3200 break;
3201 case QUERY_MAP_RSP:
3202 handle_query_map_rsp(crq, adapter);
3203 break;
3204 case REQUEST_MAP_RSP:
3205 handle_request_map_rsp(crq, adapter);
3206 break;
3207 case REQUEST_UNMAP_RSP:
3208 handle_request_unmap_rsp(crq, adapter);
3209 break;
3210 case REQUEST_CAPABILITY_RSP:
3211 handle_request_cap_rsp(crq, adapter);
3212 break;
3213 case LOGIN_RSP:
3214 netdev_dbg(netdev, "Got Login Response\n");
3215 handle_login_rsp(crq, adapter);
3216 break;
3217 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3218 netdev_dbg(netdev,
3219 "Got Logical Link State Response, state: %d rc: %d\n",
3220 crq->logical_link_state_rsp.link_state,
3221 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3222 adapter->logical_link_state =
3223 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3224 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3225 complete(&adapter->init_done);
032c5e82
TF		 3226 break;
3227 case LINK_STATE_INDICATION:
3228 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3229 adapter->phys_link_state =
3230 crq->link_state_indication.phys_link_state;
3231 adapter->logical_link_state =
3232 crq->link_state_indication.logical_link_state;
3233 break;
3234 case CHANGE_MAC_ADDR_RSP:
3235 netdev_dbg(netdev, "Got MAC address change Response\n");
3236 handle_change_mac_rsp(crq, adapter);
3237 break;
3238 case ERROR_INDICATION:
3239 netdev_dbg(netdev, "Got Error Indication\n");
3240 handle_error_indication(crq, adapter);
3241 break;
3242 case REQUEST_ERROR_RSP:
3243 netdev_dbg(netdev, "Got Error Detail Response\n");
3244 handle_error_info_rsp(crq, adapter);
3245 break;
3246 case REQUEST_STATISTICS_RSP:
3247 netdev_dbg(netdev, "Got Statistics Response\n");
3248 complete(&adapter->stats_done);
3249 break;
032c5e82
TF		 3250 case QUERY_IP_OFFLOAD_RSP:
3251 netdev_dbg(netdev, "Got Query IP offload Response\n");
3252 handle_query_ip_offload_rsp(adapter);
3253 break;
3254 case MULTICAST_CTRL_RSP:
3255 netdev_dbg(netdev, "Got multicast control Response\n");
3256 break;
3257 case CONTROL_IP_OFFLOAD_RSP:
3258 netdev_dbg(netdev, "Got Control IP offload Response\n");
3259 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3260 sizeof(adapter->ip_offload_ctrl),
3261 DMA_TO_DEVICE);
bd0b6723 3262 complete(&adapter->init_done);
032c5e82 3263 break;
032c5e82
TF		 3264 case COLLECT_FW_TRACE_RSP:
3265 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3266 complete(&adapter->fw_done);
3267 break;
3268 default:
3269 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3270 gen_crq->cmd);
3271 }
3272}
3273
3274static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3275{
3276 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3277
6c267b3d 3278 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3279 return IRQ_HANDLED;
3280}
3281
3282static void ibmvnic_tasklet(void *data)
3283{
3284 struct ibmvnic_adapter *adapter = data;
032c5e82 3285 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3286 union ibmvnic_crq *crq;
3287 unsigned long flags;
3288 bool done = false;
3289
3290 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3291 while (!done) {
3292 /* Pull all the valid messages off the CRQ */
3293 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3294 ibmvnic_handle_crq(crq, adapter);
3295 crq->generic.first = 0;
3296 }
ed7ecbf7
BK		 3297
3298 /* remain in tasklet until all
3299 * capabilities responses are received
3300 */
3301 if (!adapter->wait_capability)
3302 done = true;
032c5e82 3303 }
249168ad
TF		 3304 /* if capabilities CRQ's were sent in this tasklet, the following
3305 * tasklet must wait until all responses are received
3306 */
3307 if (atomic_read(&adapter->running_cap_crqs) != 0)
3308 adapter->wait_capability = true;
032c5e82 3309 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3310}
3311
3312static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3313{
3314 struct vio_dev *vdev = adapter->vdev;
3315 int rc;
3316
3317 do {
3318 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3319 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3320
3321 if (rc)
3322 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3323
3324 return rc;
3325}
3326
3327static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3328{
3329 struct ibmvnic_crq_queue *crq = &adapter->crq;
3330 struct device *dev = &adapter->vdev->dev;
3331 struct vio_dev *vdev = adapter->vdev;
3332 int rc;
3333
3334 /* Close the CRQ */
3335 do {
3336 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3337 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3338
3339 /* Clean out the queue */
3340 memset(crq->msgs, 0, PAGE_SIZE);
3341 crq->cur = 0;
3342
3343 /* And re-open it again */
3344 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3345 crq->msg_token, PAGE_SIZE);
3346
3347 if (rc == H_CLOSED)
3348 /* Adapter is good, but other end is not ready */
3349 dev_warn(dev, "Partner adapter not ready\n");
3350 else if (rc != 0)
3351 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3352
3353 return rc;
3354}
3355
f992887c 3356static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3357{
3358 struct ibmvnic_crq_queue *crq = &adapter->crq;
3359 struct vio_dev *vdev = adapter->vdev;
3360 long rc;
3361
f992887c
NF		 3362 if (!crq->msgs)
3363 return;
3364
032c5e82
TF		 3365 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3366 free_irq(vdev->irq, adapter);
6c267b3d 3367 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3368 do {
3369 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3370 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3371
3372 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3373 DMA_BIDIRECTIONAL);
3374 free_page((unsigned long)crq->msgs);
f992887c 3375 crq->msgs = NULL;
032c5e82
TF		 3376}
3377
f992887c 3378static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3379{
3380 struct ibmvnic_crq_queue *crq = &adapter->crq;
3381 struct device *dev = &adapter->vdev->dev;
3382 struct vio_dev *vdev = adapter->vdev;
3383 int rc, retrc = -ENOMEM;
3384
f992887c
NF		 3385 if (crq->msgs)
3386 return 0;
3387
032c5e82
TF		 3388 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3389 /* Should we allocate more than one page? */
3390
3391 if (!crq->msgs)
3392 return -ENOMEM;
3393
3394 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3395 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3396 DMA_BIDIRECTIONAL);
3397 if (dma_mapping_error(dev, crq->msg_token))
3398 goto map_failed;
3399
3400 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3401 crq->msg_token, PAGE_SIZE);
3402
3403 if (rc == H_RESOURCE)
3404 /* maybe kexecing and resource is busy. try a reset */
3405 rc = ibmvnic_reset_crq(adapter);
3406 retrc = rc;
3407
3408 if (rc == H_CLOSED) {
3409 dev_warn(dev, "Partner adapter not ready\n");
3410 } else if (rc) {
3411 dev_warn(dev, "Error %d opening adapter\n", rc);
3412 goto reg_crq_failed;
3413 }
3414
3415 retrc = 0;
3416
6c267b3d
TF		 3417 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3418 (unsigned long)adapter);
3419
032c5e82
TF		 3420 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3421 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3422 adapter);
3423 if (rc) {
3424 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3425 vdev->irq, rc);
3426 goto req_irq_failed;
3427 }
3428
3429 rc = vio_enable_interrupts(vdev);
3430 if (rc) {
3431 dev_err(dev, "Error %d enabling interrupts\n", rc);
3432 goto req_irq_failed;
3433 }
3434
3435 crq->cur = 0;
3436 spin_lock_init(&crq->lock);
3437
3438 return retrc;
3439
3440req_irq_failed:
6c267b3d 3441 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3442 do {
3443 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3444 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3445reg_crq_failed:
3446 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3447map_failed:
3448 free_page((unsigned long)crq->msgs);
f992887c 3449 crq->msgs = NULL;
032c5e82
TF		 3450 return retrc;
3451}
3452
f6ef6408 3453static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3454{
f6ef6408 3455 struct device *dev = &adapter->vdev->dev;
ea22d51a 3456 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3457 int rc;
3458
f992887c 3459 rc = init_crq_queue(adapter);
f6ef6408
JA		 3460 if (rc) {
3461 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3462 return rc;
3463 }
3464
f6ef6408
JA		 3465 init_completion(&adapter->init_done);
3466 ibmvnic_send_crq_init(adapter);
3467 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3468 dev_err(dev, "Initialization sequence timed out\n");
f992887c 3469 release_crq_queue(adapter);
f6ef6408
JA		 3470 return -1;
3471 }
3472
1bb3c739
NF		 3473 rc = init_sub_crqs(adapter);
3474 if (rc) {
3475 dev_err(dev, "Initialization of sub crqs failed\n");
3476 release_crq_queue(adapter);
3477 }
3478
3479 return rc;
f6ef6408
JA		 3480}
3481
3482static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3483{
032c5e82
TF		 3484 struct ibmvnic_adapter *adapter;
3485 struct net_device *netdev;
3486 unsigned char *mac_addr_p;
032c5e82
TF		 3487 int rc;
3488
3489 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3490 dev->unit_address);
3491
3492 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3493 VETH_MAC_ADDR, NULL);
3494 if (!mac_addr_p) {
3495 dev_err(&dev->dev,
3496 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3497 __FILE__, __LINE__);
3498 return 0;
3499 }
3500
3501 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3502 IBMVNIC_MAX_TX_QUEUES);
3503 if (!netdev)
3504 return -ENOMEM;
3505
3506 adapter = netdev_priv(netdev);
90c8014c 3507 adapter->state = VNIC_PROBING;
032c5e82
TF		 3508 dev_set_drvdata(&dev->dev, netdev);
3509 adapter->vdev = dev;
3510 adapter->netdev = netdev;
3511
3512 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3513 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3514 netdev->irq = dev->irq;
3515 netdev->netdev_ops = &ibmvnic_netdev_ops;
3516 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3517 SET_NETDEV_DEV(netdev, &dev->dev);
3518
3519 spin_lock_init(&adapter->stats_lock);
3520
032c5e82 3521 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3522 spin_lock_init(&adapter->error_list_lock);
032c5e82 3523
ed651a10
NF		 3524 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3525 INIT_LIST_HEAD(&adapter->rwi_list);
3526 mutex_init(&adapter->reset_lock);
3527 mutex_init(&adapter->rwi_lock);
3528 adapter->resetting = false;
3529
f6ef6408
JA		 3530 rc = ibmvnic_init(adapter);
3531 if (rc) {
3532 free_netdev(netdev);
3533 return rc;
032c5e82 3534 }
032c5e82 3535
f39f0d1e 3536 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82
TF		 3537
3538 rc = register_netdev(netdev);
3539 if (rc) {
3540 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3541 free_netdev(netdev);
3542 return rc;
032c5e82
TF		 3543 }
3544 dev_info(&dev->dev, "ibmvnic registered\n");
3545
90c8014c 3546 adapter->state = VNIC_PROBED;
032c5e82 3547 return 0;
032c5e82
TF		 3548}
3549
3550static int ibmvnic_remove(struct vio_dev *dev)
3551{
3552 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3553 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3554
90c8014c 3555 adapter->state = VNIC_REMOVING;
032c5e82 3556 unregister_netdev(netdev);
ed651a10 3557 mutex_lock(&adapter->reset_lock);
37489055
NF		 3558
3559 release_resources(adapter);
3560 release_sub_crqs(adapter);
3561 release_crq_queue(adapter);
3562
90c8014c
NF		 3563 adapter->state = VNIC_REMOVED;
3564
ed651a10 3565 mutex_unlock(&adapter->reset_lock);
032c5e82
TF		 3566 free_netdev(netdev);
3567 dev_set_drvdata(&dev->dev, NULL);
3568
3569 return 0;
3570}
3571
3572static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3573{
3574 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3575 struct ibmvnic_adapter *adapter;
3576 struct iommu_table *tbl;
3577 unsigned long ret = 0;
3578 int i;
3579
3580 tbl = get_iommu_table_base(&vdev->dev);
3581
3582 /* netdev inits at probe time along with the structures we need below*/
3583 if (!netdev)
3584 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3585
3586 adapter = netdev_priv(netdev);
3587
3588 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3589 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3590
3591 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3592 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3593
3594 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3595 i++)
3596 ret += adapter->rx_pool[i].size *
3597 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3598
3599 return ret;
3600}
3601
3602static int ibmvnic_resume(struct device *dev)
3603{
3604 struct net_device *netdev = dev_get_drvdata(dev);
3605 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3606 int i;
3607
3608 /* kick the interrupt handlers just in case we lost an interrupt */
3609 for (i = 0; i < adapter->req_rx_queues; i++)
3610 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3611 adapter->rx_scrq[i]);
3612
3613 return 0;
3614}
3615
3616static struct vio_device_id ibmvnic_device_table[] = {
3617 {"network", "IBM,vnic"},
3618 {"", "" }
3619};
3620MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3621
3622static const struct dev_pm_ops ibmvnic_pm_ops = {
3623 .resume = ibmvnic_resume
3624};
3625
3626static struct vio_driver ibmvnic_driver = {
3627 .id_table = ibmvnic_device_table,
3628 .probe = ibmvnic_probe,
3629 .remove = ibmvnic_remove,
3630 .get_desired_dma = ibmvnic_get_desired_dma,
3631 .name = ibmvnic_driver_name,
3632 .pm = &ibmvnic_pm_ops,
3633};
3634
3635/* module functions */
3636static int __init ibmvnic_module_init(void)
3637{
3638 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3639 IBMVNIC_DRIVER_VERSION);
3640
3641 return vio_register_driver(&ibmvnic_driver);
3642}
3643
3644static void __exit ibmvnic_module_exit(void)
3645{
3646 vio_unregister_driver(&ibmvnic_driver);
3647}
3648
3649module_init(ibmvnic_module_init);
3650module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)