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Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd
[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
62#include <linux/in.h>
63#include <linux/ip.h>
ad7775dc 64#include <linux/ipv6.h>
032c5e82
TF		 65#include <linux/irq.h>
66#include <linux/kthread.h>
67#include <linux/seq_file.h>
032c5e82
TF		 68#include <linux/interrupt.h>
69#include <net/net_namespace.h>
70#include <asm/hvcall.h>
71#include <linux/atomic.h>
72#include <asm/vio.h>
73#include <asm/iommu.h>
74#include <linux/uaccess.h>
75#include <asm/firmware.h>
65dc6891 76#include <linux/workqueue.h>
6052d5e2 77#include <linux/if_vlan.h>
032c5e82
TF		 78
79#include "ibmvnic.h"
80
81static const char ibmvnic_driver_name[] = "ibmvnic";
82static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
78b07ac1 84MODULE_AUTHOR("Santiago Leon");
032c5e82
TF		 85MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90static int ibmvnic_remove(struct vio_dev *);
91static void release_sub_crqs(struct ibmvnic_adapter *);
92static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
ad7775dc 98static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 99static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static int ibmvnic_poll(struct napi_struct *napi, int data);
109static void send_map_query(struct ibmvnic_adapter *adapter);
110static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 112static void send_login(struct ibmvnic_adapter *adapter);
113static void send_cap_queries(struct ibmvnic_adapter *adapter);
4d96f12a 114static int init_sub_crqs(struct ibmvnic_adapter *);
bd0b6723 115static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 116static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 117static void release_crq_queue(struct ibmvnic_adapter *);
032c5e82
TF		 118
119struct ibmvnic_stat {
120 char name[ETH_GSTRING_LEN];
121 int offset;
122};
123
124#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
125 offsetof(struct ibmvnic_statistics, stat))
126#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
127
128static const struct ibmvnic_stat ibmvnic_stats[] = {
129 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
130 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
131 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
132 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
133 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
134 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
135 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
136 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
137 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
138 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
139 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
140 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
141 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
142 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
143 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
144 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
145 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
146 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
147 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
148 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
149 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
150 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
151};
152
153static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
154 unsigned long length, unsigned long *number,
155 unsigned long *irq)
156{
157 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
158 long rc;
159
160 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
161 *number = retbuf[0];
162 *irq = retbuf[1];
163
164 return rc;
165}
166
032c5e82
TF		 167static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
168 struct ibmvnic_long_term_buff *ltb, int size)
169{
170 struct device *dev = &adapter->vdev->dev;
171
172 ltb->size = size;
173 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
174 GFP_KERNEL);
175
176 if (!ltb->buff) {
177 dev_err(dev, "Couldn't alloc long term buffer\n");
178 return -ENOMEM;
179 }
180 ltb->map_id = adapter->map_id;
181 adapter->map_id++;
db5d0b59
NF		 182
183 init_completion(&adapter->fw_done);
032c5e82
TF		 184 send_request_map(adapter, ltb->addr,
185 ltb->size, ltb->map_id);
032c5e82 186 wait_for_completion(&adapter->fw_done);
f3be0cbc
TF		 187
188 if (adapter->fw_done_rc) {
189 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
190 adapter->fw_done_rc);
191 return -1;
192 }
032c5e82
TF		 193 return 0;
194}
195
196static void free_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb)
198{
199 struct device *dev = &adapter->vdev->dev;
200
c657e32c
NF		 201 if (!ltb->buff)
202 return;
203
ed651a10
NF		 204 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
205 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 206 send_request_unmap(adapter, ltb->map_id);
59af56c2 207 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 208}
209
f3be0cbc
TF		 210static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
211 struct ibmvnic_long_term_buff *ltb)
212{
213 memset(ltb->buff, 0, ltb->size);
214
215 init_completion(&adapter->fw_done);
216 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
217 wait_for_completion(&adapter->fw_done);
218
219 if (adapter->fw_done_rc) {
220 dev_info(&adapter->vdev->dev,
221 "Reset failed, attempting to free and reallocate buffer\n");
222 free_long_term_buff(adapter, ltb);
223 return alloc_long_term_buff(adapter, ltb, ltb->size);
224 }
225 return 0;
226}
227
f185a49a
TF		 228static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
229{
230 int i;
231
232 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
233 i++)
234 adapter->rx_pool[i].active = 0;
235}
236
032c5e82
TF		 237static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
238 struct ibmvnic_rx_pool *pool)
239{
240 int count = pool->size - atomic_read(&pool->available);
241 struct device *dev = &adapter->vdev->dev;
242 int buffers_added = 0;
243 unsigned long lpar_rc;
244 union sub_crq sub_crq;
245 struct sk_buff *skb;
246 unsigned int offset;
247 dma_addr_t dma_addr;
248 unsigned char *dst;
249 u64 *handle_array;
250 int shift = 0;
251 int index;
252 int i;
253
f185a49a
TF		 254 if (!pool->active)
255 return;
256
032c5e82
TF		 257 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
258 be32_to_cpu(adapter->login_rsp_buf->
259 off_rxadd_subcrqs));
260
261 for (i = 0; i < count; ++i) {
262 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
263 if (!skb) {
264 dev_err(dev, "Couldn't replenish rx buff\n");
265 adapter->replenish_no_mem++;
266 break;
267 }
268
269 index = pool->free_map[pool->next_free];
270
271 if (pool->rx_buff[index].skb)
272 dev_err(dev, "Inconsistent free_map!\n");
273
274 /* Copy the skb to the long term mapped DMA buffer */
275 offset = index * pool->buff_size;
276 dst = pool->long_term_buff.buff + offset;
277 memset(dst, 0, pool->buff_size);
278 dma_addr = pool->long_term_buff.addr + offset;
279 pool->rx_buff[index].data = dst;
280
281 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
282 pool->rx_buff[index].dma = dma_addr;
283 pool->rx_buff[index].skb = skb;
284 pool->rx_buff[index].pool_index = pool->index;
285 pool->rx_buff[index].size = pool->buff_size;
286
287 memset(&sub_crq, 0, sizeof(sub_crq));
288 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
289 sub_crq.rx_add.correlator =
290 cpu_to_be64((u64)&pool->rx_buff[index]);
291 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
292 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
293
294 /* The length field of the sCRQ is defined to be 24 bits so the
295 * buffer size needs to be left shifted by a byte before it is
296 * converted to big endian to prevent the last byte from being
297 * truncated.
298 */
299#ifdef __LITTLE_ENDIAN__
300 shift = 8;
301#endif
302 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
303
304 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
305 &sub_crq);
306 if (lpar_rc != H_SUCCESS)
307 goto failure;
308
309 buffers_added++;
310 adapter->replenish_add_buff_success++;
311 pool->next_free = (pool->next_free + 1) % pool->size;
312 }
313 atomic_add(buffers_added, &pool->available);
314 return;
315
316failure:
317 dev_info(dev, "replenish pools failure\n");
318 pool->free_map[pool->next_free] = index;
319 pool->rx_buff[index].skb = NULL;
320 if (!dma_mapping_error(dev, dma_addr))
321 dma_unmap_single(dev, dma_addr, pool->buff_size,
322 DMA_FROM_DEVICE);
323
324 dev_kfree_skb_any(skb);
325 adapter->replenish_add_buff_failure++;
326 atomic_add(buffers_added, &pool->available);
f185a49a
TF		 327
328 if (lpar_rc == H_CLOSED) {
329 /* Disable buffer pool replenishment and report carrier off if
330 * queue is closed. Firmware guarantees that a signal will
331 * be sent to the driver, triggering a reset.
332 */
333 deactivate_rx_pools(adapter);
334 netif_carrier_off(adapter->netdev);
335 }
032c5e82
TF		 336}
337
338static void replenish_pools(struct ibmvnic_adapter *adapter)
339{
340 int i;
341
032c5e82
TF		 342 adapter->replenish_task_cycles++;
343 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
344 i++) {
345 if (adapter->rx_pool[i].active)
346 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
347 }
348}
349
7bbc27a4
NF		 350static void release_stats_token(struct ibmvnic_adapter *adapter)
351{
352 struct device *dev = &adapter->vdev->dev;
353
354 if (!adapter->stats_token)
355 return;
356
357 dma_unmap_single(dev, adapter->stats_token,
358 sizeof(struct ibmvnic_statistics),
359 DMA_FROM_DEVICE);
360 adapter->stats_token = 0;
361}
362
363static int init_stats_token(struct ibmvnic_adapter *adapter)
364{
365 struct device *dev = &adapter->vdev->dev;
366 dma_addr_t stok;
367
368 stok = dma_map_single(dev, &adapter->stats,
369 sizeof(struct ibmvnic_statistics),
370 DMA_FROM_DEVICE);
371 if (dma_mapping_error(dev, stok)) {
372 dev_err(dev, "Couldn't map stats buffer\n");
373 return -1;
374 }
375
376 adapter->stats_token = stok;
377 return 0;
378}
379
8c0543ad
NF		 380static int reset_rx_pools(struct ibmvnic_adapter *adapter)
381{
382 struct ibmvnic_rx_pool *rx_pool;
383 int rx_scrqs;
f3be0cbc 384 int i, j, rc;
8c0543ad
NF		 385
386 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
387 for (i = 0; i < rx_scrqs; i++) {
388 rx_pool = &adapter->rx_pool[i];
389
f3be0cbc
TF		 390 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
391 if (rc)
392 return rc;
8c0543ad
NF		 393
394 for (j = 0; j < rx_pool->size; j++)
395 rx_pool->free_map[j] = j;
396
397 memset(rx_pool->rx_buff, 0,
398 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
399
400 atomic_set(&rx_pool->available, 0);
401 rx_pool->next_alloc = 0;
402 rx_pool->next_free = 0;
c3e53b9a 403 rx_pool->active = 1;
8c0543ad
NF		 404 }
405
406 return 0;
407}
408
0ffe2cb7 409static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 410{
0ffe2cb7
NF		 411 struct ibmvnic_rx_pool *rx_pool;
412 int rx_scrqs;
413 int i, j;
032c5e82 414
0ffe2cb7 415 if (!adapter->rx_pool)
032c5e82
TF		 416 return;
417
0ffe2cb7
NF		 418 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
419 for (i = 0; i < rx_scrqs; i++) {
420 rx_pool = &adapter->rx_pool[i];
421
422 kfree(rx_pool->free_map);
423 free_long_term_buff(adapter, &rx_pool->long_term_buff);
424
425 if (!rx_pool->rx_buff)
e0ebe942 426 continue;
0ffe2cb7
NF		 427
428 for (j = 0; j < rx_pool->size; j++) {
429 if (rx_pool->rx_buff[j].skb) {
430 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
431 rx_pool->rx_buff[i].skb = NULL;
432 }
433 }
434
435 kfree(rx_pool->rx_buff);
436 }
437
438 kfree(adapter->rx_pool);
439 adapter->rx_pool = NULL;
440}
441
442static int init_rx_pools(struct net_device *netdev)
443{
444 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
445 struct device *dev = &adapter->vdev->dev;
446 struct ibmvnic_rx_pool *rx_pool;
447 int rxadd_subcrqs;
448 u64 *size_array;
449 int i, j;
450
451 rxadd_subcrqs =
452 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
453 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
454 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
455
456 adapter->rx_pool = kcalloc(rxadd_subcrqs,
457 sizeof(struct ibmvnic_rx_pool),
458 GFP_KERNEL);
459 if (!adapter->rx_pool) {
460 dev_err(dev, "Failed to allocate rx pools\n");
461 return -1;
462 }
463
464 for (i = 0; i < rxadd_subcrqs; i++) {
465 rx_pool = &adapter->rx_pool[i];
466
467 netdev_dbg(adapter->netdev,
468 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
469 i, adapter->req_rx_add_entries_per_subcrq,
470 be64_to_cpu(size_array[i]));
471
472 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
473 rx_pool->index = i;
474 rx_pool->buff_size = be64_to_cpu(size_array[i]);
475 rx_pool->active = 1;
476
477 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
478 GFP_KERNEL);
479 if (!rx_pool->free_map) {
480 release_rx_pools(adapter);
481 return -1;
032c5e82 482 }
0ffe2cb7
NF		 483
484 rx_pool->rx_buff = kcalloc(rx_pool->size,
485 sizeof(struct ibmvnic_rx_buff),
486 GFP_KERNEL);
487 if (!rx_pool->rx_buff) {
488 dev_err(dev, "Couldn't alloc rx buffers\n");
489 release_rx_pools(adapter);
490 return -1;
491 }
492
493 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
494 rx_pool->size * rx_pool->buff_size)) {
495 release_rx_pools(adapter);
496 return -1;
497 }
498
499 for (j = 0; j < rx_pool->size; ++j)
500 rx_pool->free_map[j] = j;
501
502 atomic_set(&rx_pool->available, 0);
503 rx_pool->next_alloc = 0;
504 rx_pool->next_free = 0;
032c5e82 505 }
0ffe2cb7
NF		 506
507 return 0;
032c5e82
TF		 508}
509
8c0543ad
NF		 510static int reset_tx_pools(struct ibmvnic_adapter *adapter)
511{
512 struct ibmvnic_tx_pool *tx_pool;
513 int tx_scrqs;
f3be0cbc 514 int i, j, rc;
8c0543ad
NF		 515
516 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
517 for (i = 0; i < tx_scrqs; i++) {
518 tx_pool = &adapter->tx_pool[i];
519
f3be0cbc
TF		 520 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
521 if (rc)
522 return rc;
8c0543ad
NF		 523
524 memset(tx_pool->tx_buff, 0,
525 adapter->req_tx_entries_per_subcrq *
526 sizeof(struct ibmvnic_tx_buff));
527
528 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
529 tx_pool->free_map[j] = j;
530
531 tx_pool->consumer_index = 0;
532 tx_pool->producer_index = 0;
533 }
534
535 return 0;
536}
537
c657e32c
NF		 538static void release_tx_pools(struct ibmvnic_adapter *adapter)
539{
540 struct ibmvnic_tx_pool *tx_pool;
541 int i, tx_scrqs;
542
543 if (!adapter->tx_pool)
544 return;
545
546 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
547 for (i = 0; i < tx_scrqs; i++) {
548 tx_pool = &adapter->tx_pool[i];
549 kfree(tx_pool->tx_buff);
550 free_long_term_buff(adapter, &tx_pool->long_term_buff);
551 kfree(tx_pool->free_map);
552 }
553
554 kfree(adapter->tx_pool);
555 adapter->tx_pool = NULL;
556}
557
558static int init_tx_pools(struct net_device *netdev)
559{
560 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
561 struct device *dev = &adapter->vdev->dev;
562 struct ibmvnic_tx_pool *tx_pool;
563 int tx_subcrqs;
564 int i, j;
565
566 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
567 adapter->tx_pool = kcalloc(tx_subcrqs,
568 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
569 if (!adapter->tx_pool)
570 return -1;
571
572 for (i = 0; i < tx_subcrqs; i++) {
573 tx_pool = &adapter->tx_pool[i];
574 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
575 sizeof(struct ibmvnic_tx_buff),
576 GFP_KERNEL);
577 if (!tx_pool->tx_buff) {
578 dev_err(dev, "tx pool buffer allocation failed\n");
579 release_tx_pools(adapter);
580 return -1;
581 }
582
583 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
584 adapter->req_tx_entries_per_subcrq *
585 adapter->req_mtu)) {
586 release_tx_pools(adapter);
587 return -1;
588 }
589
590 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
591 sizeof(int), GFP_KERNEL);
592 if (!tx_pool->free_map) {
593 release_tx_pools(adapter);
594 return -1;
595 }
596
597 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
598 tx_pool->free_map[j] = j;
599
600 tx_pool->consumer_index = 0;
601 tx_pool->producer_index = 0;
602 }
603
604 return 0;
605}
606
661a2622
NF		 607static void release_error_buffers(struct ibmvnic_adapter *adapter)
608{
609 struct device *dev = &adapter->vdev->dev;
610 struct ibmvnic_error_buff *error_buff, *tmp;
611 unsigned long flags;
612
613 spin_lock_irqsave(&adapter->error_list_lock, flags);
614 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
615 list_del(&error_buff->list);
616 dma_unmap_single(dev, error_buff->dma, error_buff->len,
617 DMA_FROM_DEVICE);
618 kfree(error_buff->buff);
619 kfree(error_buff);
620 }
621 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
622}
623
d944c3d6
JA		 624static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
625{
626 int i;
627
628 if (adapter->napi_enabled)
629 return;
630
631 for (i = 0; i < adapter->req_rx_queues; i++)
632 napi_enable(&adapter->napi[i]);
633
634 adapter->napi_enabled = true;
635}
636
637static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
638{
639 int i;
640
641 if (!adapter->napi_enabled)
642 return;
643
644 for (i = 0; i < adapter->req_rx_queues; i++)
645 napi_disable(&adapter->napi[i]);
646
647 adapter->napi_enabled = false;
648}
649
a57a5d25 650static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 651{
652 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 653 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 654 struct device *dev = &adapter->vdev->dev;
4d96f12a 655 int rc;
032c5e82 656
bd0b6723
JA		 657 do {
658 if (adapter->renegotiate) {
659 adapter->renegotiate = false;
b510888f 660 release_sub_crqs(adapter);
bd0b6723
JA		 661
662 reinit_completion(&adapter->init_done);
663 send_cap_queries(adapter);
664 if (!wait_for_completion_timeout(&adapter->init_done,
665 timeout)) {
666 dev_err(dev, "Capabilities query timeout\n");
667 return -1;
668 }
4d96f12a
TF		 669 rc = init_sub_crqs(adapter);
670 if (rc) {
671 dev_err(dev,
672 "Initialization of SCRQ's failed\n");
673 return -1;
674 }
675 rc = init_sub_crq_irqs(adapter);
676 if (rc) {
677 dev_err(dev,
678 "Initialization of SCRQ's irqs failed\n");
679 return -1;
680 }
bd0b6723
JA		 681 }
682
683 reinit_completion(&adapter->init_done);
684 send_login(adapter);
685 if (!wait_for_completion_timeout(&adapter->init_done,
686 timeout)) {
687 dev_err(dev, "Login timeout\n");
688 return -1;
689 }
690 } while (adapter->renegotiate);
691
a57a5d25
JA		 692 return 0;
693}
694
1b8955ee
NF		 695static void release_resources(struct ibmvnic_adapter *adapter)
696{
c7bac00b
NF		 697 int i;
698
1b8955ee
NF		 699 release_tx_pools(adapter);
700 release_rx_pools(adapter);
701
1b8955ee 702 release_stats_token(adapter);
661a2622 703 release_error_buffers(adapter);
c7bac00b
NF		 704
705 if (adapter->napi) {
706 for (i = 0; i < adapter->req_rx_queues; i++) {
707 if (&adapter->napi[i])
708 netif_napi_del(&adapter->napi[i]);
709 }
710 }
1b8955ee
NF		 711}
712
53da09e9
NF		 713static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
714{
715 struct net_device *netdev = adapter->netdev;
716 unsigned long timeout = msecs_to_jiffies(30000);
717 union ibmvnic_crq crq;
718 bool resend;
719 int rc;
720
53da09e9
NF		 721 netdev_err(netdev, "setting link state %d\n", link_state);
722 memset(&crq, 0, sizeof(crq));
723 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
724 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
725 crq.logical_link_state.link_state = link_state;
726
727 do {
728 resend = false;
729
730 reinit_completion(&adapter->init_done);
731 rc = ibmvnic_send_crq(adapter, &crq);
732 if (rc) {
733 netdev_err(netdev, "Failed to set link state\n");
734 return rc;
735 }
736
737 if (!wait_for_completion_timeout(&adapter->init_done,
738 timeout)) {
739 netdev_err(netdev, "timeout setting link state\n");
740 return -1;
741 }
742
743 if (adapter->init_done_rc == 1) {
744 /* Partuial success, delay and re-send */
745 mdelay(1000);
746 resend = true;
747 }
748 } while (resend);
749
750 return 0;
751}
752
7f3c6e6b
TF		 753static int set_real_num_queues(struct net_device *netdev)
754{
755 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
756 int rc;
757
758 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
759 if (rc) {
760 netdev_err(netdev, "failed to set the number of tx queues\n");
761 return rc;
762 }
763
764 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
765 if (rc)
766 netdev_err(netdev, "failed to set the number of rx queues\n");
767
768 return rc;
769}
770
bfc32f29 771static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 772{
bfc32f29
NF		 773 struct net_device *netdev = adapter->netdev;
774 int i, rc;
a57a5d25 775
7f3c6e6b
TF		 776 rc = set_real_num_queues(netdev);
777 if (rc)
778 return rc;
bd0b6723 779
5d5e84eb
NF		 780 rc = init_stats_token(adapter);
781 if (rc)
782 return rc;
783
032c5e82
TF		 784 adapter->map_id = 1;
785 adapter->napi = kcalloc(adapter->req_rx_queues,
786 sizeof(struct napi_struct), GFP_KERNEL);
787 if (!adapter->napi)
bfc32f29
NF		 788 return -ENOMEM;
789
032c5e82
TF		 790 for (i = 0; i < adapter->req_rx_queues; i++) {
791 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
792 NAPI_POLL_WEIGHT);
032c5e82 793 }
032c5e82 794
032c5e82 795 send_map_query(adapter);
0ffe2cb7
NF		 796
797 rc = init_rx_pools(netdev);
798 if (rc)
bfc32f29 799 return rc;
032c5e82 800
c657e32c 801 rc = init_tx_pools(netdev);
bfc32f29
NF		 802 return rc;
803}
804
ed651a10 805static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 806{
807 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 808 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 809 int i, rc;
810
90c8014c 811 adapter->state = VNIC_OPENING;
032c5e82 812 replenish_pools(adapter);
d944c3d6 813 ibmvnic_napi_enable(adapter);
bfc32f29 814
032c5e82
TF		 815 /* We're ready to receive frames, enable the sub-crq interrupts and
816 * set the logical link state to up
817 */
ed651a10
NF		 818 for (i = 0; i < adapter->req_rx_queues; i++) {
819 if (prev_state == VNIC_CLOSED)
820 enable_irq(adapter->rx_scrq[i]->irq);
821 else
822 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
823 }
032c5e82 824
ed651a10
NF		 825 for (i = 0; i < adapter->req_tx_queues; i++) {
826 if (prev_state == VNIC_CLOSED)
827 enable_irq(adapter->tx_scrq[i]->irq);
828 else
829 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
830 }
032c5e82 831
53da09e9 832 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 833 if (rc) {
834 for (i = 0; i < adapter->req_rx_queues; i++)
835 napi_disable(&adapter->napi[i]);
836 release_resources(adapter);
ed651a10 837 return rc;
bfc32f29 838 }
032c5e82 839
ed651a10
NF		 840 netif_tx_start_all_queues(netdev);
841
842 if (prev_state == VNIC_CLOSED) {
843 for (i = 0; i < adapter->req_rx_queues; i++)
844 napi_schedule(&adapter->napi[i]);
845 }
846
847 adapter->state = VNIC_OPEN;
848 return rc;
849}
850
851static int ibmvnic_open(struct net_device *netdev)
852{
853 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
854 int rc;
855
856 mutex_lock(&adapter->reset_lock);
857
858 if (adapter->state != VNIC_CLOSED) {
859 rc = ibmvnic_login(netdev);
860 if (rc) {
861 mutex_unlock(&adapter->reset_lock);
862 return rc;
863 }
864
865 rc = init_resources(adapter);
866 if (rc) {
867 netdev_err(netdev, "failed to initialize resources\n");
868 release_resources(adapter);
869 mutex_unlock(&adapter->reset_lock);
870 return rc;
871 }
872 }
873
874 rc = __ibmvnic_open(netdev);
875 mutex_unlock(&adapter->reset_lock);
876
bfc32f29 877 return rc;
032c5e82
TF		 878}
879
b41b83e9
NF		 880static void clean_tx_pools(struct ibmvnic_adapter *adapter)
881{
882 struct ibmvnic_tx_pool *tx_pool;
883 u64 tx_entries;
884 int tx_scrqs;
885 int i, j;
886
887 if (!adapter->tx_pool)
888 return;
889
890 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
891 tx_entries = adapter->req_tx_entries_per_subcrq;
892
893 /* Free any remaining skbs in the tx buffer pools */
894 for (i = 0; i < tx_scrqs; i++) {
895 tx_pool = &adapter->tx_pool[i];
896 if (!tx_pool)
897 continue;
898
899 for (j = 0; j < tx_entries; j++) {
900 if (tx_pool->tx_buff[j].skb) {
901 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
902 tx_pool->tx_buff[j].skb = NULL;
903 }
904 }
905 }
906}
907
ed651a10 908static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 909{
910 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 911 int rc = 0;
ea5509f5
JA		 912 int i;
913
90c8014c 914 adapter->state = VNIC_CLOSING;
4c2687a5
TF		 915
916 /* ensure that transmissions are stopped if called by do_reset */
917 if (adapter->resetting)
918 netif_tx_disable(netdev);
919 else
920 netif_tx_stop_all_queues(netdev);
921
d944c3d6 922 ibmvnic_napi_disable(adapter);
46293b94
NF		 923
924 if (adapter->tx_scrq) {
925 for (i = 0; i < adapter->req_tx_queues; i++)
926 if (adapter->tx_scrq[i]->irq)
927 disable_irq(adapter->tx_scrq[i]->irq);
928 }
929
53da09e9 930 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 931 if (rc)
932 return rc;
933
934 if (adapter->rx_scrq) {
935 for (i = 0; i < adapter->req_rx_queues; i++) {
936 int retries = 10;
937
938 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
939 retries--;
940 mdelay(100);
941
942 if (retries == 0)
943 break;
944 }
945
946 if (adapter->rx_scrq[i]->irq)
947 disable_irq(adapter->rx_scrq[i]->irq);
948 }
949 }
ea5509f5 950
10f76215 951 clean_tx_pools(adapter);
90c8014c 952 adapter->state = VNIC_CLOSED;
53da09e9 953 return rc;
032c5e82
TF		 954}
955
ed651a10
NF		 956static int ibmvnic_close(struct net_device *netdev)
957{
958 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
959 int rc;
960
961 mutex_lock(&adapter->reset_lock);
962 rc = __ibmvnic_close(netdev);
963 mutex_unlock(&adapter->reset_lock);
964
965 return rc;
966}
967
ad7775dc
TF		 968/**
969 * build_hdr_data - creates L2/L3/L4 header data buffer
970 * @hdr_field - bitfield determining needed headers
971 * @skb - socket buffer
972 * @hdr_len - array of header lengths
973 * @tot_len - total length of data
974 *
975 * Reads hdr_field to determine which headers are needed by firmware.
976 * Builds a buffer containing these headers. Saves individual header
977 * lengths and total buffer length to be used to build descriptors.
978 */
979static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
980 int *hdr_len, u8 *hdr_data)
981{
982 int len = 0;
983 u8 *hdr;
984
985 hdr_len[0] = sizeof(struct ethhdr);
986
987 if (skb->protocol == htons(ETH_P_IP)) {
988 hdr_len[1] = ip_hdr(skb)->ihl * 4;
989 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
990 hdr_len[2] = tcp_hdrlen(skb);
991 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
992 hdr_len[2] = sizeof(struct udphdr);
993 } else if (skb->protocol == htons(ETH_P_IPV6)) {
994 hdr_len[1] = sizeof(struct ipv6hdr);
995 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
996 hdr_len[2] = tcp_hdrlen(skb);
997 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
998 hdr_len[2] = sizeof(struct udphdr);
999 }
1000
1001 memset(hdr_data, 0, 120);
1002 if ((hdr_field >> 6) & 1) {
1003 hdr = skb_mac_header(skb);
1004 memcpy(hdr_data, hdr, hdr_len[0]);
1005 len += hdr_len[0];
1006 }
1007
1008 if ((hdr_field >> 5) & 1) {
1009 hdr = skb_network_header(skb);
1010 memcpy(hdr_data + len, hdr, hdr_len[1]);
1011 len += hdr_len[1];
1012 }
1013
1014 if ((hdr_field >> 4) & 1) {
1015 hdr = skb_transport_header(skb);
1016 memcpy(hdr_data + len, hdr, hdr_len[2]);
1017 len += hdr_len[2];
1018 }
1019 return len;
1020}
1021
1022/**
1023 * create_hdr_descs - create header and header extension descriptors
1024 * @hdr_field - bitfield determining needed headers
1025 * @data - buffer containing header data
1026 * @len - length of data buffer
1027 * @hdr_len - array of individual header lengths
1028 * @scrq_arr - descriptor array
1029 *
1030 * Creates header and, if needed, header extension descriptors and
1031 * places them in a descriptor array, scrq_arr
1032 */
1033
1034static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1035 union sub_crq *scrq_arr)
1036{
1037 union sub_crq hdr_desc;
1038 int tmp_len = len;
1039 u8 *data, *cur;
1040 int tmp;
1041
1042 while (tmp_len > 0) {
1043 cur = hdr_data + len - tmp_len;
1044
1045 memset(&hdr_desc, 0, sizeof(hdr_desc));
1046 if (cur != hdr_data) {
1047 data = hdr_desc.hdr_ext.data;
1048 tmp = tmp_len > 29 ? 29 : tmp_len;
1049 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1050 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1051 hdr_desc.hdr_ext.len = tmp;
1052 } else {
1053 data = hdr_desc.hdr.data;
1054 tmp = tmp_len > 24 ? 24 : tmp_len;
1055 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1056 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1057 hdr_desc.hdr.len = tmp;
1058 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1059 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1060 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1061 hdr_desc.hdr.flag = hdr_field << 1;
1062 }
1063 memcpy(data, cur, tmp);
1064 tmp_len -= tmp;
1065 *scrq_arr = hdr_desc;
1066 scrq_arr++;
1067 }
1068}
1069
1070/**
1071 * build_hdr_descs_arr - build a header descriptor array
1072 * @skb - socket buffer
1073 * @num_entries - number of descriptors to be sent
1074 * @subcrq - first TX descriptor
1075 * @hdr_field - bit field determining which headers will be sent
1076 *
1077 * This function will build a TX descriptor array with applicable
1078 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1079 */
1080
1081static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1082 int *num_entries, u8 hdr_field)
1083{
1084 int hdr_len[3] = {0, 0, 0};
1085 int tot_len, len;
1086 u8 *hdr_data = txbuff->hdr_data;
1087
1088 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1089 txbuff->hdr_data);
1090 len = tot_len;
1091 len -= 24;
1092 if (len > 0)
1093 num_entries += len % 29 ? len / 29 + 1 : len / 29;
1094 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1095 txbuff->indir_arr + 1);
1096}
1097
032c5e82
TF		 1098static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1099{
1100 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1101 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1102 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1103 struct device *dev = &adapter->vdev->dev;
1104 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1105 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1106 struct ibmvnic_tx_pool *tx_pool;
1107 unsigned int tx_send_failed = 0;
1108 unsigned int tx_map_failed = 0;
1109 unsigned int tx_dropped = 0;
1110 unsigned int tx_packets = 0;
1111 unsigned int tx_bytes = 0;
1112 dma_addr_t data_dma_addr;
1113 struct netdev_queue *txq;
032c5e82
TF		 1114 unsigned long lpar_rc;
1115 union sub_crq tx_crq;
1116 unsigned int offset;
ad7775dc 1117 int num_entries = 1;
032c5e82
TF		 1118 unsigned char *dst;
1119 u64 *handle_array;
1120 int index = 0;
1121 int ret = 0;
1122
ed651a10 1123 if (adapter->resetting) {
7f5b0308
TF		 1124 if (!netif_subqueue_stopped(netdev, skb))
1125 netif_stop_subqueue(netdev, queue_num);
1126 dev_kfree_skb_any(skb);
1127
032c5e82
TF		 1128 tx_send_failed++;
1129 tx_dropped++;
7f5b0308 1130 ret = NETDEV_TX_OK;
032c5e82
TF		 1131 goto out;
1132 }
1133
161b8a81
NF		 1134 tx_pool = &adapter->tx_pool[queue_num];
1135 tx_scrq = adapter->tx_scrq[queue_num];
1136 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1137 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1138 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1139
032c5e82
TF		 1140 index = tx_pool->free_map[tx_pool->consumer_index];
1141 offset = index * adapter->req_mtu;
1142 dst = tx_pool->long_term_buff.buff + offset;
1143 memset(dst, 0, adapter->req_mtu);
1144 skb_copy_from_linear_data(skb, dst, skb->len);
1145 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1146
1147 tx_pool->consumer_index =
1148 (tx_pool->consumer_index + 1) %
068d9f90 1149 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1150
1151 tx_buff = &tx_pool->tx_buff[index];
1152 tx_buff->skb = skb;
1153 tx_buff->data_dma[0] = data_dma_addr;
1154 tx_buff->data_len[0] = skb->len;
1155 tx_buff->index = index;
1156 tx_buff->pool_index = queue_num;
1157 tx_buff->last_frag = true;
032c5e82
TF		 1158
1159 memset(&tx_crq, 0, sizeof(tx_crq));
1160 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1161 tx_crq.v1.type = IBMVNIC_TX_DESC;
1162 tx_crq.v1.n_crq_elem = 1;
1163 tx_crq.v1.n_sge = 1;
1164 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1165 tx_crq.v1.correlator = cpu_to_be32(index);
1166 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1167 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1168 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1169
1170 if (adapter->vlan_header_insertion) {
1171 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1172 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1173 }
1174
1175 if (skb->protocol == htons(ETH_P_IP)) {
1176 if (ip_hdr(skb)->version == 4)
1177 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1178 else if (ip_hdr(skb)->version == 6)
1179 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1180
1181 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1182 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1183 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1184 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1185 }
1186
ad7775dc 1187 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1188 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1189 hdrs += 2;
1190 }
1191 /* determine if l2/3/4 headers are sent to firmware */
1192 if ((*hdrs >> 7) & 1 &&
1193 (skb->protocol == htons(ETH_P_IP) ||
1194 skb->protocol == htons(ETH_P_IPV6))) {
1195 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1196 tx_crq.v1.n_crq_elem = num_entries;
1197 tx_buff->indir_arr[0] = tx_crq;
1198 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1199 sizeof(tx_buff->indir_arr),
1200 DMA_TO_DEVICE);
1201 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1202 dev_kfree_skb_any(skb);
1203 tx_buff->skb = NULL;
ad7775dc
TF		 1204 if (!firmware_has_feature(FW_FEATURE_CMO))
1205 dev_err(dev, "tx: unable to map descriptor array\n");
1206 tx_map_failed++;
1207 tx_dropped++;
7f5b0308 1208 ret = NETDEV_TX_OK;
ad7775dc
TF		 1209 goto out;
1210 }
498cd8e4 1211 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1212 (u64)tx_buff->indir_dma,
1213 (u64)num_entries);
1214 } else {
498cd8e4
JA		 1215 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1216 &tx_crq);
ad7775dc 1217 }
032c5e82
TF		 1218 if (lpar_rc != H_SUCCESS) {
1219 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1220
1221 if (tx_pool->consumer_index == 0)
1222 tx_pool->consumer_index =
068d9f90 1223 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1224 else
1225 tx_pool->consumer_index--;
1226
7f5b0308
TF		 1227 dev_kfree_skb_any(skb);
1228 tx_buff->skb = NULL;
1229
b8c80b84
TF		 1230 if (lpar_rc == H_CLOSED) {
1231 /* Disable TX and report carrier off if queue is closed.
1232 * Firmware guarantees that a signal will be sent to the
1233 * driver, triggering a reset or some other action.
1234 */
1235 netif_tx_stop_all_queues(netdev);
1236 netif_carrier_off(netdev);
1237 }
7f5b0308 1238
032c5e82
TF		 1239 tx_send_failed++;
1240 tx_dropped++;
7f5b0308 1241 ret = NETDEV_TX_OK;
032c5e82
TF		 1242 goto out;
1243 }
142c0ac4 1244
58c8c0c0
BK		 1245 if (atomic_inc_return(&tx_scrq->used)
1246 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1247 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1248 netif_stop_subqueue(netdev, queue_num);
1249 }
1250
032c5e82
TF		 1251 tx_packets++;
1252 tx_bytes += skb->len;
1253 txq->trans_start = jiffies;
1254 ret = NETDEV_TX_OK;
1255
1256out:
1257 netdev->stats.tx_dropped += tx_dropped;
1258 netdev->stats.tx_bytes += tx_bytes;
1259 netdev->stats.tx_packets += tx_packets;
1260 adapter->tx_send_failed += tx_send_failed;
1261 adapter->tx_map_failed += tx_map_failed;
1262
1263 return ret;
1264}
1265
1266static void ibmvnic_set_multi(struct net_device *netdev)
1267{
1268 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1269 struct netdev_hw_addr *ha;
1270 union ibmvnic_crq crq;
1271
1272 memset(&crq, 0, sizeof(crq));
1273 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1274 crq.request_capability.cmd = REQUEST_CAPABILITY;
1275
1276 if (netdev->flags & IFF_PROMISC) {
1277 if (!adapter->promisc_supported)
1278 return;
1279 } else {
1280 if (netdev->flags & IFF_ALLMULTI) {
1281 /* Accept all multicast */
1282 memset(&crq, 0, sizeof(crq));
1283 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1284 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1285 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1286 ibmvnic_send_crq(adapter, &crq);
1287 } else if (netdev_mc_empty(netdev)) {
1288 /* Reject all multicast */
1289 memset(&crq, 0, sizeof(crq));
1290 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1291 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1292 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1293 ibmvnic_send_crq(adapter, &crq);
1294 } else {
1295 /* Accept one or more multicast(s) */
1296 netdev_for_each_mc_addr(ha, netdev) {
1297 memset(&crq, 0, sizeof(crq));
1298 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1299 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1300 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1301 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1302 ha->addr);
1303 ibmvnic_send_crq(adapter, &crq);
1304 }
1305 }
1306 }
1307}
1308
1309static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1310{
1311 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1312 struct sockaddr *addr = p;
1313 union ibmvnic_crq crq;
1314
1315 if (!is_valid_ether_addr(addr->sa_data))
1316 return -EADDRNOTAVAIL;
1317
1318 memset(&crq, 0, sizeof(crq));
1319 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1320 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1321 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1322 ibmvnic_send_crq(adapter, &crq);
1323 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1324 return 0;
1325}
1326
ed651a10
NF		 1327/**
1328 * do_reset returns zero if we are able to keep processing reset events, or
1329 * non-zero if we hit a fatal error and must halt.
1330 */
1331static int do_reset(struct ibmvnic_adapter *adapter,
1332 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1333{
ed651a10
NF		 1334 struct net_device *netdev = adapter->netdev;
1335 int i, rc;
1336
1337 netif_carrier_off(netdev);
1338 adapter->reset_reason = rwi->reset_reason;
1339
1340 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1341 rc = ibmvnic_reenable_crq_queue(adapter);
1342 if (rc)
1343 return 0;
1344 }
1345
1346 rc = __ibmvnic_close(netdev);
1347 if (rc)
1348 return rc;
1349
8cb31cfc
JA		 1350 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1351 /* remove the closed state so when we call open it appears
1352 * we are coming from the probed state.
1353 */
1354 adapter->state = VNIC_PROBED;
032c5e82 1355
8cb31cfc
JA		 1356 rc = ibmvnic_init(adapter);
1357 if (rc)
1358 return 0;
ed651a10 1359
8cb31cfc
JA		 1360 /* If the adapter was in PROBE state prior to the reset,
1361 * exit here.
1362 */
1363 if (reset_state == VNIC_PROBED)
1364 return 0;
ed651a10 1365
8cb31cfc
JA		 1366 rc = ibmvnic_login(netdev);
1367 if (rc) {
1368 adapter->state = VNIC_PROBED;
1369 return 0;
1370 }
ed651a10 1371
8c0543ad
NF		 1372 rc = reset_tx_pools(adapter);
1373 if (rc)
1374 return rc;
1375
1376 rc = reset_rx_pools(adapter);
8cb31cfc
JA		 1377 if (rc)
1378 return rc;
ed651a10 1379
8cb31cfc
JA		 1380 if (reset_state == VNIC_CLOSED)
1381 return 0;
1382 }
ed651a10
NF		 1383
1384 rc = __ibmvnic_open(netdev);
1385 if (rc) {
1386 if (list_empty(&adapter->rwi_list))
1387 adapter->state = VNIC_CLOSED;
1388 else
1389 adapter->state = reset_state;
1390
1391 return 0;
1392 }
1393
1394 netif_carrier_on(netdev);
1395
1396 /* kick napi */
1397 for (i = 0; i < adapter->req_rx_queues; i++)
1398 napi_schedule(&adapter->napi[i]);
1399
61d3e1d9
NF		 1400 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1401 netdev_notify_peers(netdev);
1402
ed651a10
NF		 1403 return 0;
1404}
1405
1406static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1407{
1408 struct ibmvnic_rwi *rwi;
1409
1410 mutex_lock(&adapter->rwi_lock);
1411
1412 if (!list_empty(&adapter->rwi_list)) {
1413 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1414 list);
1415 list_del(&rwi->list);
1416 } else {
1417 rwi = NULL;
1418 }
1419
1420 mutex_unlock(&adapter->rwi_lock);
1421 return rwi;
1422}
1423
1424static void free_all_rwi(struct ibmvnic_adapter *adapter)
1425{
1426 struct ibmvnic_rwi *rwi;
1427
1428 rwi = get_next_rwi(adapter);
1429 while (rwi) {
1430 kfree(rwi);
1431 rwi = get_next_rwi(adapter);
1432 }
1433}
1434
1435static void __ibmvnic_reset(struct work_struct *work)
1436{
1437 struct ibmvnic_rwi *rwi;
1438 struct ibmvnic_adapter *adapter;
1439 struct net_device *netdev;
1440 u32 reset_state;
1441 int rc;
1442
1443 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1444 netdev = adapter->netdev;
1445
1446 mutex_lock(&adapter->reset_lock);
1447 adapter->resetting = true;
1448 reset_state = adapter->state;
1449
1450 rwi = get_next_rwi(adapter);
1451 while (rwi) {
1452 rc = do_reset(adapter, rwi, reset_state);
1453 kfree(rwi);
1454 if (rc)
1455 break;
1456
1457 rwi = get_next_rwi(adapter);
1458 }
1459
1460 if (rc) {
1461 free_all_rwi(adapter);
6d0af07d 1462 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1463 return;
1464 }
1465
1466 adapter->resetting = false;
1467 mutex_unlock(&adapter->reset_lock);
1468}
1469
1470static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1471 enum ibmvnic_reset_reason reason)
1472{
1473 struct ibmvnic_rwi *rwi, *tmp;
1474 struct net_device *netdev = adapter->netdev;
1475 struct list_head *entry;
1476
1477 if (adapter->state == VNIC_REMOVING ||
1478 adapter->state == VNIC_REMOVED) {
1479 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1480 return;
1481 }
1482
6a2fb0e9
NF		 1483 if (adapter->state == VNIC_PROBING) {
1484 netdev_warn(netdev, "Adapter reset during probe\n");
1485 adapter->init_done_rc = EAGAIN;
1486 return;
1487 }
1488
ed651a10
NF		 1489 mutex_lock(&adapter->rwi_lock);
1490
1491 list_for_each(entry, &adapter->rwi_list) {
1492 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1493 if (tmp->reset_reason == reason) {
1494 netdev_err(netdev, "Matching reset found, skipping\n");
1495 mutex_unlock(&adapter->rwi_lock);
1496 return;
1497 }
1498 }
1499
1500 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1501 if (!rwi) {
1502 mutex_unlock(&adapter->rwi_lock);
1503 ibmvnic_close(netdev);
1504 return;
1505 }
1506
1507 rwi->reset_reason = reason;
1508 list_add_tail(&rwi->list, &adapter->rwi_list);
1509 mutex_unlock(&adapter->rwi_lock);
1510 schedule_work(&adapter->ibmvnic_reset);
1511}
1512
1513static void ibmvnic_tx_timeout(struct net_device *dev)
1514{
1515 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1516
1517 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1518}
1519
1520static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1521 struct ibmvnic_rx_buff *rx_buff)
1522{
1523 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1524
1525 rx_buff->skb = NULL;
1526
1527 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1528 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1529
1530 atomic_dec(&pool->available);
1531}
1532
1533static int ibmvnic_poll(struct napi_struct *napi, int budget)
1534{
1535 struct net_device *netdev = napi->dev;
1536 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1537 int scrq_num = (int)(napi - adapter->napi);
1538 int frames_processed = 0;
152ce47d 1539
032c5e82
TF		 1540restart_poll:
1541 while (frames_processed < budget) {
1542 struct sk_buff *skb;
1543 struct ibmvnic_rx_buff *rx_buff;
1544 union sub_crq *next;
1545 u32 length;
1546 u16 offset;
1547 u8 flags = 0;
1548
21ecba6c
TF		 1549 if (unlikely(adapter->resetting)) {
1550 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1551 napi_complete_done(napi, frames_processed);
1552 return frames_processed;
1553 }
1554
032c5e82
TF		 1555 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1556 break;
1557 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1558 rx_buff =
1559 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1560 rx_comp.correlator);
1561 /* do error checking */
1562 if (next->rx_comp.rc) {
1563 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1564 /* free the entry */
1565 next->rx_comp.first = 0;
1566 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1567 continue;
032c5e82
TF		 1568 }
1569
1570 length = be32_to_cpu(next->rx_comp.len);
1571 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1572 flags = next->rx_comp.flags;
1573 skb = rx_buff->skb;
1574 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1575 length);
6052d5e2
MFV		 1576
1577 /* VLAN Header has been stripped by the system firmware and
1578 * needs to be inserted by the driver
1579 */
1580 if (adapter->rx_vlan_header_insertion &&
1581 (flags & IBMVNIC_VLAN_STRIPPED))
1582 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1583 ntohs(next->rx_comp.vlan_tci));
1584
032c5e82
TF		 1585 /* free the entry */
1586 next->rx_comp.first = 0;
1587 remove_buff_from_pool(adapter, rx_buff);
1588
1589 skb_put(skb, length);
1590 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1591 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1592
1593 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1594 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1595 skb->ip_summed = CHECKSUM_UNNECESSARY;
1596 }
1597
1598 length = skb->len;
1599 napi_gro_receive(napi, skb); /* send it up */
1600 netdev->stats.rx_packets++;
1601 netdev->stats.rx_bytes += length;
1602 frames_processed++;
1603 }
152ce47d
NF		 1604
1605 if (adapter->state != VNIC_CLOSING)
1606 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1607
1608 if (frames_processed < budget) {
1609 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1610 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1611 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1612 napi_reschedule(napi)) {
1613 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1614 goto restart_poll;
1615 }
1616 }
1617 return frames_processed;
1618}
1619
1620#ifdef CONFIG_NET_POLL_CONTROLLER
1621static void ibmvnic_netpoll_controller(struct net_device *dev)
1622{
1623 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1624 int i;
1625
1626 replenish_pools(netdev_priv(dev));
1627 for (i = 0; i < adapter->req_rx_queues; i++)
1628 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1629 adapter->rx_scrq[i]);
1630}
1631#endif
1632
3a807b75
JA		 1633static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1634{
1635 return -EOPNOTSUPP;
1636}
1637
032c5e82
TF		 1638static const struct net_device_ops ibmvnic_netdev_ops = {
1639 .ndo_open = ibmvnic_open,
1640 .ndo_stop = ibmvnic_close,
1641 .ndo_start_xmit = ibmvnic_xmit,
1642 .ndo_set_rx_mode = ibmvnic_set_multi,
1643 .ndo_set_mac_address = ibmvnic_set_mac,
1644 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1645 .ndo_tx_timeout = ibmvnic_tx_timeout,
1646#ifdef CONFIG_NET_POLL_CONTROLLER
1647 .ndo_poll_controller = ibmvnic_netpoll_controller,
1648#endif
3a807b75 1649 .ndo_change_mtu = ibmvnic_change_mtu,
032c5e82
TF		 1650};
1651
1652/* ethtool functions */
1653
8a43379f
PR		 1654static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1655 struct ethtool_link_ksettings *cmd)
032c5e82 1656{
8a43379f
PR		 1657 u32 supported, advertising;
1658
1659 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1660 SUPPORTED_FIBRE);
8a43379f 1661 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1662 ADVERTISED_FIBRE);
8a43379f
PR		 1663 cmd->base.speed = SPEED_1000;
1664 cmd->base.duplex = DUPLEX_FULL;
1665 cmd->base.port = PORT_FIBRE;
1666 cmd->base.phy_address = 0;
1667 cmd->base.autoneg = AUTONEG_ENABLE;
1668
1669 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1670 supported);
1671 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1672 advertising);
1673
032c5e82
TF		 1674 return 0;
1675}
1676
1677static void ibmvnic_get_drvinfo(struct net_device *dev,
1678 struct ethtool_drvinfo *info)
1679{
1680 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1681 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1682}
1683
1684static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1685{
1686 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1687
1688 return adapter->msg_enable;
1689}
1690
1691static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1692{
1693 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1694
1695 adapter->msg_enable = data;
1696}
1697
1698static u32 ibmvnic_get_link(struct net_device *netdev)
1699{
1700 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1701
1702 /* Don't need to send a query because we request a logical link up at
1703 * init and then we wait for link state indications
1704 */
1705 return adapter->logical_link_state;
1706}
1707
1708static void ibmvnic_get_ringparam(struct net_device *netdev,
1709 struct ethtool_ringparam *ring)
1710{
1711 ring->rx_max_pending = 0;
1712 ring->tx_max_pending = 0;
1713 ring->rx_mini_max_pending = 0;
1714 ring->rx_jumbo_max_pending = 0;
1715 ring->rx_pending = 0;
1716 ring->tx_pending = 0;
1717 ring->rx_mini_pending = 0;
1718 ring->rx_jumbo_pending = 0;
1719}
1720
1721static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1722{
1723 int i;
1724
1725 if (stringset != ETH_SS_STATS)
1726 return;
1727
1728 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1729 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1730}
1731
1732static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1733{
1734 switch (sset) {
1735 case ETH_SS_STATS:
1736 return ARRAY_SIZE(ibmvnic_stats);
1737 default:
1738 return -EOPNOTSUPP;
1739 }
1740}
1741
1742static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1743 struct ethtool_stats *stats, u64 *data)
1744{
1745 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1746 union ibmvnic_crq crq;
1747 int i;
1748
1749 memset(&crq, 0, sizeof(crq));
1750 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1751 crq.request_statistics.cmd = REQUEST_STATISTICS;
1752 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1753 crq.request_statistics.len =
1754 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1755
1756 /* Wait for data to be written */
1757 init_completion(&adapter->stats_done);
db5d0b59 1758 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1759 wait_for_completion(&adapter->stats_done);
1760
1761 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1762 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1763}
1764
1765static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1766 .get_drvinfo = ibmvnic_get_drvinfo,
1767 .get_msglevel = ibmvnic_get_msglevel,
1768 .set_msglevel = ibmvnic_set_msglevel,
1769 .get_link = ibmvnic_get_link,
1770 .get_ringparam = ibmvnic_get_ringparam,
1771 .get_strings = ibmvnic_get_strings,
1772 .get_sset_count = ibmvnic_get_sset_count,
1773 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1774 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1775};
1776
1777/* Routines for managing CRQs/sCRQs */
1778
57a49436
NF		 1779static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1780 struct ibmvnic_sub_crq_queue *scrq)
1781{
1782 int rc;
1783
1784 if (scrq->irq) {
1785 free_irq(scrq->irq, scrq);
1786 irq_dispose_mapping(scrq->irq);
1787 scrq->irq = 0;
1788 }
1789
c8b2ad0a 1790 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
57a49436
NF		 1791 scrq->cur = 0;
1792
1793 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1794 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1795 return rc;
1796}
1797
1798static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1799{
1800 int i, rc;
1801
1802 for (i = 0; i < adapter->req_tx_queues; i++) {
1803 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1804 if (rc)
1805 return rc;
1806 }
1807
1808 for (i = 0; i < adapter->req_rx_queues; i++) {
1809 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1810 if (rc)
1811 return rc;
1812 }
1813
57a49436
NF		 1814 return rc;
1815}
1816
032c5e82
TF		 1817static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1818 struct ibmvnic_sub_crq_queue *scrq)
1819{
1820 struct device *dev = &adapter->vdev->dev;
1821 long rc;
1822
1823 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1824
1825 /* Close the sub-crqs */
1826 do {
1827 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1828 adapter->vdev->unit_address,
1829 scrq->crq_num);
1830 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1831
ffa73855
TF		 1832 if (rc) {
1833 netdev_err(adapter->netdev,
1834 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1835 scrq->crq_num, rc);
1836 }
1837
032c5e82
TF		 1838 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1839 DMA_BIDIRECTIONAL);
1840 free_pages((unsigned long)scrq->msgs, 2);
1841 kfree(scrq);
1842}
1843
1844static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1845 *adapter)
1846{
1847 struct device *dev = &adapter->vdev->dev;
1848 struct ibmvnic_sub_crq_queue *scrq;
1849 int rc;
1850
1bb3c739 1851 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1852 if (!scrq)
1853 return NULL;
1854
7f7adc50 1855 scrq->msgs =
1bb3c739 1856 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1857 if (!scrq->msgs) {
1858 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1859 goto zero_page_failed;
1860 }
1861
1862 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1863 DMA_BIDIRECTIONAL);
1864 if (dma_mapping_error(dev, scrq->msg_token)) {
1865 dev_warn(dev, "Couldn't map crq queue messages page\n");
1866 goto map_failed;
1867 }
1868
1869 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1870 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1871
1872 if (rc == H_RESOURCE)
1873 rc = ibmvnic_reset_crq(adapter);
1874
1875 if (rc == H_CLOSED) {
1876 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1877 } else if (rc) {
1878 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1879 goto reg_failed;
1880 }
1881
032c5e82
TF		 1882 scrq->adapter = adapter;
1883 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1884 spin_lock_init(&scrq->lock);
1885
1886 netdev_dbg(adapter->netdev,
1887 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1888 scrq->crq_num, scrq->hw_irq, scrq->irq);
1889
1890 return scrq;
1891
032c5e82
TF		 1892reg_failed:
1893 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1894 DMA_BIDIRECTIONAL);
1895map_failed:
1896 free_pages((unsigned long)scrq->msgs, 2);
1897zero_page_failed:
1898 kfree(scrq);
1899
1900 return NULL;
1901}
1902
1903static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1904{
1905 int i;
1906
1907 if (adapter->tx_scrq) {
b510888f
NF		 1908 for (i = 0; i < adapter->req_tx_queues; i++) {
1909 if (!adapter->tx_scrq[i])
1910 continue;
1911
1912 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1913 free_irq(adapter->tx_scrq[i]->irq,
1914 adapter->tx_scrq[i]);
88eb98a0 1915 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1916 adapter->tx_scrq[i]->irq = 0;
032c5e82 1917 }
b510888f
NF		 1918
1919 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1920 }
1921
9501df3c 1922 kfree(adapter->tx_scrq);
032c5e82
TF		 1923 adapter->tx_scrq = NULL;
1924 }
1925
1926 if (adapter->rx_scrq) {
b510888f
NF		 1927 for (i = 0; i < adapter->req_rx_queues; i++) {
1928 if (!adapter->rx_scrq[i])
1929 continue;
1930
1931 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1932 free_irq(adapter->rx_scrq[i]->irq,
1933 adapter->rx_scrq[i]);
88eb98a0 1934 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1935 adapter->rx_scrq[i]->irq = 0;
032c5e82 1936 }
032c5e82 1937
b510888f
NF		 1938 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1939 }
ea22d51a 1940
b510888f 1941 kfree(adapter->rx_scrq);
ea22d51a
TF		 1942 adapter->rx_scrq = NULL;
1943 }
ea22d51a
TF		 1944}
1945
032c5e82
TF		 1946static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1947 struct ibmvnic_sub_crq_queue *scrq)
1948{
1949 struct device *dev = &adapter->vdev->dev;
1950 unsigned long rc;
1951
1952 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1953 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1954 if (rc)
1955 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1956 scrq->hw_irq, rc);
1957 return rc;
1958}
1959
1960static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1961 struct ibmvnic_sub_crq_queue *scrq)
1962{
1963 struct device *dev = &adapter->vdev->dev;
1964 unsigned long rc;
1965
1966 if (scrq->hw_irq > 0x100000000ULL) {
1967 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1968 return 1;
1969 }
1970
1971 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1972 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1973 if (rc)
1974 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1975 scrq->hw_irq, rc);
1976 return rc;
1977}
1978
1979static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1980 struct ibmvnic_sub_crq_queue *scrq)
1981{
1982 struct device *dev = &adapter->vdev->dev;
1983 struct ibmvnic_tx_buff *txbuff;
1984 union sub_crq *next;
1985 int index;
1986 int i, j;
ad7775dc 1987 u8 first;
032c5e82
TF		 1988
1989restart_loop:
1990 while (pending_scrq(adapter, scrq)) {
1991 unsigned int pool = scrq->pool_index;
1992
1993 next = ibmvnic_next_scrq(adapter, scrq);
1994 for (i = 0; i < next->tx_comp.num_comps; i++) {
1995 if (next->tx_comp.rcs[i]) {
1996 dev_err(dev, "tx error %x\n",
1997 next->tx_comp.rcs[i]);
1998 continue;
1999 }
2000 index = be32_to_cpu(next->tx_comp.correlators[i]);
2001 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2002
2003 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2004 if (!txbuff->data_dma[j])
2005 continue;
2006
2007 txbuff->data_dma[j] = 0;
032c5e82 2008 }
ad7775dc
TF		 2009 /* if sub_crq was sent indirectly */
2010 first = txbuff->indir_arr[0].generic.first;
2011 if (first == IBMVNIC_CRQ_CMD) {
2012 dma_unmap_single(dev, txbuff->indir_dma,
2013 sizeof(txbuff->indir_arr),
2014 DMA_TO_DEVICE);
2015 }
032c5e82 2016
142c0ac4 2017 if (txbuff->last_frag) {
032c5e82 2018 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 2019 txbuff->skb = NULL;
142c0ac4 2020 }
032c5e82
TF		 2021
2022 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2023 producer_index] = index;
2024 adapter->tx_pool[pool].producer_index =
2025 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 2026 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2027 }
2028 /* remove tx_comp scrq*/
2029 next->tx_comp.first = 0;
7c3e7de3
NF		 2030
2031 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2032 (adapter->req_tx_entries_per_subcrq / 2) &&
2033 __netif_subqueue_stopped(adapter->netdev,
2034 scrq->pool_index)) {
2035 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2036 netdev_info(adapter->netdev, "Started queue %d\n",
2037 scrq->pool_index);
2038 }
032c5e82
TF		 2039 }
2040
2041 enable_scrq_irq(adapter, scrq);
2042
2043 if (pending_scrq(adapter, scrq)) {
2044 disable_scrq_irq(adapter, scrq);
2045 goto restart_loop;
2046 }
2047
2048 return 0;
2049}
2050
2051static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2052{
2053 struct ibmvnic_sub_crq_queue *scrq = instance;
2054 struct ibmvnic_adapter *adapter = scrq->adapter;
2055
2056 disable_scrq_irq(adapter, scrq);
2057 ibmvnic_complete_tx(adapter, scrq);
2058
2059 return IRQ_HANDLED;
2060}
2061
2062static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2063{
2064 struct ibmvnic_sub_crq_queue *scrq = instance;
2065 struct ibmvnic_adapter *adapter = scrq->adapter;
2066
2067 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2068 disable_scrq_irq(adapter, scrq);
2069 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2070 }
2071
2072 return IRQ_HANDLED;
2073}
2074
ea22d51a
TF		 2075static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2076{
2077 struct device *dev = &adapter->vdev->dev;
2078 struct ibmvnic_sub_crq_queue *scrq;
2079 int i = 0, j = 0;
2080 int rc = 0;
2081
2082 for (i = 0; i < adapter->req_tx_queues; i++) {
2083 scrq = adapter->tx_scrq[i];
2084 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2085
99c1790e 2086 if (!scrq->irq) {
ea22d51a
TF		 2087 rc = -EINVAL;
2088 dev_err(dev, "Error mapping irq\n");
2089 goto req_tx_irq_failed;
2090 }
2091
2092 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2093 0, "ibmvnic_tx", scrq);
2094
2095 if (rc) {
2096 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2097 scrq->irq, rc);
2098 irq_dispose_mapping(scrq->irq);
2099 goto req_rx_irq_failed;
2100 }
2101 }
2102
2103 for (i = 0; i < adapter->req_rx_queues; i++) {
2104 scrq = adapter->rx_scrq[i];
2105 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2106 if (!scrq->irq) {
ea22d51a
TF		 2107 rc = -EINVAL;
2108 dev_err(dev, "Error mapping irq\n");
2109 goto req_rx_irq_failed;
2110 }
2111 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2112 0, "ibmvnic_rx", scrq);
2113 if (rc) {
2114 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2115 scrq->irq, rc);
2116 irq_dispose_mapping(scrq->irq);
2117 goto req_rx_irq_failed;
2118 }
2119 }
2120 return rc;
2121
2122req_rx_irq_failed:
8bf371e6 2123 for (j = 0; j < i; j++) {
ea22d51a
TF		 2124 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2125 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2126 }
ea22d51a
TF		 2127 i = adapter->req_tx_queues;
2128req_tx_irq_failed:
8bf371e6 2129 for (j = 0; j < i; j++) {
ea22d51a
TF		 2130 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2131 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2132 }
b510888f 2133 release_sub_crqs(adapter);
ea22d51a
TF		 2134 return rc;
2135}
2136
d346b9bc 2137static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2138{
2139 struct device *dev = &adapter->vdev->dev;
2140 struct ibmvnic_sub_crq_queue **allqueues;
2141 int registered_queues = 0;
032c5e82
TF		 2142 int total_queues;
2143 int more = 0;
ea22d51a 2144 int i;
032c5e82 2145
032c5e82
TF		 2146 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2147
1bb3c739 2148 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2149 if (!allqueues)
d346b9bc 2150 return -1;
032c5e82
TF		 2151
2152 for (i = 0; i < total_queues; i++) {
2153 allqueues[i] = init_sub_crq_queue(adapter);
2154 if (!allqueues[i]) {
2155 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2156 break;
2157 }
2158 registered_queues++;
2159 }
2160
2161 /* Make sure we were able to register the minimum number of queues */
2162 if (registered_queues <
2163 adapter->min_tx_queues + adapter->min_rx_queues) {
2164 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2165 goto tx_failed;
2166 }
2167
2168 /* Distribute the failed allocated queues*/
2169 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2170 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2171 switch (i % 3) {
2172 case 0:
2173 if (adapter->req_rx_queues > adapter->min_rx_queues)
2174 adapter->req_rx_queues--;
2175 else
2176 more++;
2177 break;
2178 case 1:
2179 if (adapter->req_tx_queues > adapter->min_tx_queues)
2180 adapter->req_tx_queues--;
2181 else
2182 more++;
2183 break;
2184 }
2185 }
2186
2187 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2188 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2189 if (!adapter->tx_scrq)
2190 goto tx_failed;
2191
2192 for (i = 0; i < adapter->req_tx_queues; i++) {
2193 adapter->tx_scrq[i] = allqueues[i];
2194 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2195 }
2196
2197 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2198 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2199 if (!adapter->rx_scrq)
2200 goto rx_failed;
2201
2202 for (i = 0; i < adapter->req_rx_queues; i++) {
2203 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2204 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2205 }
2206
d346b9bc
NF		 2207 kfree(allqueues);
2208 return 0;
2209
2210rx_failed:
2211 kfree(adapter->tx_scrq);
2212 adapter->tx_scrq = NULL;
2213tx_failed:
2214 for (i = 0; i < registered_queues; i++)
2215 release_sub_crq_queue(adapter, allqueues[i]);
2216 kfree(allqueues);
2217 return -1;
2218}
2219
2220static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2221{
2222 struct device *dev = &adapter->vdev->dev;
2223 union ibmvnic_crq crq;
d346b9bc
NF		 2224
2225 if (!retry) {
2226 /* Sub-CRQ entries are 32 byte long */
2227 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2228
2229 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2230 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2231 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2232 return;
2233 }
2234
2235 /* Get the minimum between the queried max and the entries
2236 * that fit in our PAGE_SIZE
2237 */
2238 adapter->req_tx_entries_per_subcrq =
2239 adapter->max_tx_entries_per_subcrq > entries_page ?
2240 entries_page : adapter->max_tx_entries_per_subcrq;
2241 adapter->req_rx_add_entries_per_subcrq =
2242 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2243 entries_page : adapter->max_rx_add_entries_per_subcrq;
2244
2245 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2246 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2247 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2248
2249 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2250 }
2251
032c5e82
TF		 2252 memset(&crq, 0, sizeof(crq));
2253 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2254 crq.request_capability.cmd = REQUEST_CAPABILITY;
2255
2256 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2257 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2258 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2259 ibmvnic_send_crq(adapter, &crq);
2260
2261 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2262 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2263 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2264 ibmvnic_send_crq(adapter, &crq);
2265
2266 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2267 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2268 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2269 ibmvnic_send_crq(adapter, &crq);
2270
2271 crq.request_capability.capability =
2272 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2273 crq.request_capability.number =
de89e854 2274 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2275 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2276 ibmvnic_send_crq(adapter, &crq);
2277
2278 crq.request_capability.capability =
2279 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2280 crq.request_capability.number =
de89e854 2281 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2282 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2283 ibmvnic_send_crq(adapter, &crq);
2284
2285 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2286 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2287 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2288 ibmvnic_send_crq(adapter, &crq);
2289
2290 if (adapter->netdev->flags & IFF_PROMISC) {
2291 if (adapter->promisc_supported) {
2292 crq.request_capability.capability =
2293 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2294 crq.request_capability.number = cpu_to_be64(1);
901e040a 2295 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2296 ibmvnic_send_crq(adapter, &crq);
2297 }
2298 } else {
2299 crq.request_capability.capability =
2300 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2301 crq.request_capability.number = cpu_to_be64(0);
901e040a 2302 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2303 ibmvnic_send_crq(adapter, &crq);
2304 }
032c5e82
TF		 2305}
2306
2307static int pending_scrq(struct ibmvnic_adapter *adapter,
2308 struct ibmvnic_sub_crq_queue *scrq)
2309{
2310 union sub_crq *entry = &scrq->msgs[scrq->cur];
2311
1cf9cc72 2312 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
032c5e82
TF		 2313 return 1;
2314 else
2315 return 0;
2316}
2317
2318static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2319 struct ibmvnic_sub_crq_queue *scrq)
2320{
2321 union sub_crq *entry;
2322 unsigned long flags;
2323
2324 spin_lock_irqsave(&scrq->lock, flags);
2325 entry = &scrq->msgs[scrq->cur];
2326 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2327 if (++scrq->cur == scrq->size)
2328 scrq->cur = 0;
2329 } else {
2330 entry = NULL;
2331 }
2332 spin_unlock_irqrestore(&scrq->lock, flags);
2333
2334 return entry;
2335}
2336
2337static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2338{
2339 struct ibmvnic_crq_queue *queue = &adapter->crq;
2340 union ibmvnic_crq *crq;
2341
2342 crq = &queue->msgs[queue->cur];
2343 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2344 if (++queue->cur == queue->size)
2345 queue->cur = 0;
2346 } else {
2347 crq = NULL;
2348 }
2349
2350 return crq;
2351}
2352
2353static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2354 union sub_crq *sub_crq)
2355{
2356 unsigned int ua = adapter->vdev->unit_address;
2357 struct device *dev = &adapter->vdev->dev;
2358 u64 *u64_crq = (u64 *)sub_crq;
2359 int rc;
2360
2361 netdev_dbg(adapter->netdev,
2362 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2363 (unsigned long int)cpu_to_be64(remote_handle),
2364 (unsigned long int)cpu_to_be64(u64_crq[0]),
2365 (unsigned long int)cpu_to_be64(u64_crq[1]),
2366 (unsigned long int)cpu_to_be64(u64_crq[2]),
2367 (unsigned long int)cpu_to_be64(u64_crq[3]));
2368
2369 /* Make sure the hypervisor sees the complete request */
2370 mb();
2371
2372 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2373 cpu_to_be64(remote_handle),
2374 cpu_to_be64(u64_crq[0]),
2375 cpu_to_be64(u64_crq[1]),
2376 cpu_to_be64(u64_crq[2]),
2377 cpu_to_be64(u64_crq[3]));
2378
2379 if (rc) {
2380 if (rc == H_CLOSED)
2381 dev_warn(dev, "CRQ Queue closed\n");
2382 dev_err(dev, "Send error (rc=%d)\n", rc);
2383 }
2384
2385 return rc;
2386}
2387
ad7775dc
TF		 2388static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2389 u64 remote_handle, u64 ioba, u64 num_entries)
2390{
2391 unsigned int ua = adapter->vdev->unit_address;
2392 struct device *dev = &adapter->vdev->dev;
2393 int rc;
2394
2395 /* Make sure the hypervisor sees the complete request */
2396 mb();
2397 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2398 cpu_to_be64(remote_handle),
2399 ioba, num_entries);
2400
2401 if (rc) {
2402 if (rc == H_CLOSED)
2403 dev_warn(dev, "CRQ Queue closed\n");
2404 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2405 }
2406
2407 return rc;
2408}
2409
032c5e82
TF		 2410static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2411 union ibmvnic_crq *crq)
2412{
2413 unsigned int ua = adapter->vdev->unit_address;
2414 struct device *dev = &adapter->vdev->dev;
2415 u64 *u64_crq = (u64 *)crq;
2416 int rc;
2417
2418 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2419 (unsigned long int)cpu_to_be64(u64_crq[0]),
2420 (unsigned long int)cpu_to_be64(u64_crq[1]));
2421
2422 /* Make sure the hypervisor sees the complete request */
2423 mb();
2424
2425 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2426 cpu_to_be64(u64_crq[0]),
2427 cpu_to_be64(u64_crq[1]));
2428
2429 if (rc) {
2430 if (rc == H_CLOSED)
2431 dev_warn(dev, "CRQ Queue closed\n");
2432 dev_warn(dev, "Send error (rc=%d)\n", rc);
2433 }
2434
2435 return rc;
2436}
2437
2438static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2439{
2440 union ibmvnic_crq crq;
2441
2442 memset(&crq, 0, sizeof(crq));
2443 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2444 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2445 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2446
2447 return ibmvnic_send_crq(adapter, &crq);
2448}
2449
032c5e82
TF		 2450static int send_version_xchg(struct ibmvnic_adapter *adapter)
2451{
2452 union ibmvnic_crq crq;
2453
2454 memset(&crq, 0, sizeof(crq));
2455 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2456 crq.version_exchange.cmd = VERSION_EXCHANGE;
2457 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2458
2459 return ibmvnic_send_crq(adapter, &crq);
2460}
2461
2462static void send_login(struct ibmvnic_adapter *adapter)
2463{
2464 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2465 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2466 struct device *dev = &adapter->vdev->dev;
2467 dma_addr_t rsp_buffer_token;
2468 dma_addr_t buffer_token;
2469 size_t rsp_buffer_size;
2470 union ibmvnic_crq crq;
032c5e82
TF		 2471 size_t buffer_size;
2472 __be64 *tx_list_p;
2473 __be64 *rx_list_p;
2474 int i;
2475
2476 buffer_size =
2477 sizeof(struct ibmvnic_login_buffer) +
2478 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2479
2480 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2481 if (!login_buffer)
2482 goto buf_alloc_failed;
2483
2484 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2485 DMA_TO_DEVICE);
2486 if (dma_mapping_error(dev, buffer_token)) {
2487 dev_err(dev, "Couldn't map login buffer\n");
2488 goto buf_map_failed;
2489 }
2490
498cd8e4
JA		 2491 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2492 sizeof(u64) * adapter->req_tx_queues +
2493 sizeof(u64) * adapter->req_rx_queues +
2494 sizeof(u64) * adapter->req_rx_queues +
2495 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2496
2497 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2498 if (!login_rsp_buffer)
2499 goto buf_rsp_alloc_failed;
2500
2501 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2502 rsp_buffer_size, DMA_FROM_DEVICE);
2503 if (dma_mapping_error(dev, rsp_buffer_token)) {
2504 dev_err(dev, "Couldn't map login rsp buffer\n");
2505 goto buf_rsp_map_failed;
2506 }
661a2622 2507
032c5e82
TF		 2508 adapter->login_buf = login_buffer;
2509 adapter->login_buf_token = buffer_token;
2510 adapter->login_buf_sz = buffer_size;
2511 adapter->login_rsp_buf = login_rsp_buffer;
2512 adapter->login_rsp_buf_token = rsp_buffer_token;
2513 adapter->login_rsp_buf_sz = rsp_buffer_size;
2514
2515 login_buffer->len = cpu_to_be32(buffer_size);
2516 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2517 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2518 login_buffer->off_txcomp_subcrqs =
2519 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2520 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2521 login_buffer->off_rxcomp_subcrqs =
2522 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2523 sizeof(u64) * adapter->req_tx_queues);
2524 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2525 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2526
2527 tx_list_p = (__be64 *)((char *)login_buffer +
2528 sizeof(struct ibmvnic_login_buffer));
2529 rx_list_p = (__be64 *)((char *)login_buffer +
2530 sizeof(struct ibmvnic_login_buffer) +
2531 sizeof(u64) * adapter->req_tx_queues);
2532
2533 for (i = 0; i < adapter->req_tx_queues; i++) {
2534 if (adapter->tx_scrq[i]) {
2535 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2536 crq_num);
2537 }
2538 }
2539
2540 for (i = 0; i < adapter->req_rx_queues; i++) {
2541 if (adapter->rx_scrq[i]) {
2542 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2543 crq_num);
2544 }
2545 }
2546
2547 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2548 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2549 netdev_dbg(adapter->netdev, "%016lx\n",
2550 ((unsigned long int *)(adapter->login_buf))[i]);
2551 }
2552
2553 memset(&crq, 0, sizeof(crq));
2554 crq.login.first = IBMVNIC_CRQ_CMD;
2555 crq.login.cmd = LOGIN;
2556 crq.login.ioba = cpu_to_be32(buffer_token);
2557 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2558 ibmvnic_send_crq(adapter, &crq);
2559
2560 return;
2561
032c5e82
TF		 2562buf_rsp_map_failed:
2563 kfree(login_rsp_buffer);
2564buf_rsp_alloc_failed:
2565 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2566buf_map_failed:
2567 kfree(login_buffer);
2568buf_alloc_failed:
2569 return;
2570}
2571
2572static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2573 u32 len, u8 map_id)
2574{
2575 union ibmvnic_crq crq;
2576
2577 memset(&crq, 0, sizeof(crq));
2578 crq.request_map.first = IBMVNIC_CRQ_CMD;
2579 crq.request_map.cmd = REQUEST_MAP;
2580 crq.request_map.map_id = map_id;
2581 crq.request_map.ioba = cpu_to_be32(addr);
2582 crq.request_map.len = cpu_to_be32(len);
2583 ibmvnic_send_crq(adapter, &crq);
2584}
2585
2586static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2587{
2588 union ibmvnic_crq crq;
2589
2590 memset(&crq, 0, sizeof(crq));
2591 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2592 crq.request_unmap.cmd = REQUEST_UNMAP;
2593 crq.request_unmap.map_id = map_id;
2594 ibmvnic_send_crq(adapter, &crq);
2595}
2596
2597static void send_map_query(struct ibmvnic_adapter *adapter)
2598{
2599 union ibmvnic_crq crq;
2600
2601 memset(&crq, 0, sizeof(crq));
2602 crq.query_map.first = IBMVNIC_CRQ_CMD;
2603 crq.query_map.cmd = QUERY_MAP;
2604 ibmvnic_send_crq(adapter, &crq);
2605}
2606
2607/* Send a series of CRQs requesting various capabilities of the VNIC server */
2608static void send_cap_queries(struct ibmvnic_adapter *adapter)
2609{
2610 union ibmvnic_crq crq;
2611
901e040a 2612 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2613 memset(&crq, 0, sizeof(crq));
2614 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2615 crq.query_capability.cmd = QUERY_CAPABILITY;
2616
2617 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2618 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2619 ibmvnic_send_crq(adapter, &crq);
2620
2621 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2622 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2623 ibmvnic_send_crq(adapter, &crq);
2624
2625 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2626 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2627 ibmvnic_send_crq(adapter, &crq);
2628
2629 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2630 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2631 ibmvnic_send_crq(adapter, &crq);
2632
2633 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2634 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2635 ibmvnic_send_crq(adapter, &crq);
2636
2637 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2638 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2639 ibmvnic_send_crq(adapter, &crq);
2640
2641 crq.query_capability.capability =
2642 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2643 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2644 ibmvnic_send_crq(adapter, &crq);
2645
2646 crq.query_capability.capability =
2647 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2648 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2649 ibmvnic_send_crq(adapter, &crq);
2650
2651 crq.query_capability.capability =
2652 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2653 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2654 ibmvnic_send_crq(adapter, &crq);
2655
2656 crq.query_capability.capability =
2657 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2658 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2659 ibmvnic_send_crq(adapter, &crq);
2660
2661 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2662 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2663 ibmvnic_send_crq(adapter, &crq);
2664
2665 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2666 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2667 ibmvnic_send_crq(adapter, &crq);
2668
2669 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2670 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2671 ibmvnic_send_crq(adapter, &crq);
2672
2673 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2674 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2675 ibmvnic_send_crq(adapter, &crq);
2676
2677 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2678 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2679 ibmvnic_send_crq(adapter, &crq);
2680
2681 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2682 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2683 ibmvnic_send_crq(adapter, &crq);
2684
6052d5e2
MFV		 2685 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2686 atomic_inc(&adapter->running_cap_crqs);
2687 ibmvnic_send_crq(adapter, &crq);
2688
032c5e82 2689 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2690 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2691 ibmvnic_send_crq(adapter, &crq);
2692
2693 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2694 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2695 ibmvnic_send_crq(adapter, &crq);
2696
2697 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2698 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2699 ibmvnic_send_crq(adapter, &crq);
2700
2701 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2702 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2703 ibmvnic_send_crq(adapter, &crq);
2704
2705 crq.query_capability.capability =
2706 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2707 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2708 ibmvnic_send_crq(adapter, &crq);
2709
2710 crq.query_capability.capability =
2711 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2712 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2713 ibmvnic_send_crq(adapter, &crq);
2714
2715 crq.query_capability.capability =
2716 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2717 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2718 ibmvnic_send_crq(adapter, &crq);
2719
2720 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2721 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2722 ibmvnic_send_crq(adapter, &crq);
2723}
2724
2725static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2726{
2727 struct device *dev = &adapter->vdev->dev;
2728 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2729 union ibmvnic_crq crq;
2730 int i;
2731
2732 dma_unmap_single(dev, adapter->ip_offload_tok,
2733 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2734
2735 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2736 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2737 netdev_dbg(adapter->netdev, "%016lx\n",
2738 ((unsigned long int *)(buf))[i]);
2739
2740 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2741 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2742 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2743 buf->tcp_ipv4_chksum);
2744 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2745 buf->tcp_ipv6_chksum);
2746 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2747 buf->udp_ipv4_chksum);
2748 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2749 buf->udp_ipv6_chksum);
2750 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2751 buf->large_tx_ipv4);
2752 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2753 buf->large_tx_ipv6);
2754 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2755 buf->large_rx_ipv4);
2756 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2757 buf->large_rx_ipv6);
2758 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2759 buf->max_ipv4_header_size);
2760 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2761 buf->max_ipv6_header_size);
2762 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2763 buf->max_tcp_header_size);
2764 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2765 buf->max_udp_header_size);
2766 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2767 buf->max_large_tx_size);
2768 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2769 buf->max_large_rx_size);
2770 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2771 buf->ipv6_extension_header);
2772 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2773 buf->tcp_pseudosum_req);
2774 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2775 buf->num_ipv6_ext_headers);
2776 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2777 buf->off_ipv6_ext_headers);
2778
2779 adapter->ip_offload_ctrl_tok =
2780 dma_map_single(dev, &adapter->ip_offload_ctrl,
2781 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2782
2783 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2784 dev_err(dev, "Couldn't map ip offload control buffer\n");
2785 return;
2786 }
2787
2788 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2789 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2790 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2791 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2792 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2793
2794 /* large_tx/rx disabled for now, additional features needed */
2795 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2796 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2797 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2798 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2799
2800 adapter->netdev->features = NETIF_F_GSO;
2801
2802 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2803 adapter->netdev->features |= NETIF_F_IP_CSUM;
2804
2805 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2806 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2807
9be02cdf
TF		 2808 if ((adapter->netdev->features &
2809 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2810 adapter->netdev->features |= NETIF_F_RXCSUM;
2811
032c5e82
TF		 2812 memset(&crq, 0, sizeof(crq));
2813 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2814 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2815 crq.control_ip_offload.len =
2816 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2817 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2818 ibmvnic_send_crq(adapter, &crq);
2819}
2820
2821static void handle_error_info_rsp(union ibmvnic_crq *crq,
2822 struct ibmvnic_adapter *adapter)
2823{
2824 struct device *dev = &adapter->vdev->dev;
96183182 2825 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2826 unsigned long flags;
2827 bool found = false;
2828 int i;
2829
2830 if (!crq->request_error_rsp.rc.code) {
2831 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2832 crq->request_error_rsp.rc.code);
2833 return;
2834 }
2835
2836 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2837 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2838 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2839 found = true;
2840 list_del(&error_buff->list);
2841 break;
2842 }
2843 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2844
2845 if (!found) {
2846 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2847 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2848 return;
2849 }
2850
2851 dev_err(dev, "Detailed info for error id %x:",
75224c93 2852 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2853
2854 for (i = 0; i < error_buff->len; i++) {
2855 pr_cont("%02x", (int)error_buff->buff[i]);
2856 if (i % 8 == 7)
2857 pr_cont(" ");
2858 }
2859 pr_cont("\n");
2860
2861 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2862 DMA_FROM_DEVICE);
2863 kfree(error_buff->buff);
2864 kfree(error_buff);
2865}
2866
2f9de9ba
NF		 2867static void request_error_information(struct ibmvnic_adapter *adapter,
2868 union ibmvnic_crq *err_crq)
032c5e82 2869{
032c5e82 2870 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2871 struct net_device *netdev = adapter->netdev;
032c5e82 2872 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2873 unsigned long timeout = msecs_to_jiffies(30000);
2874 union ibmvnic_crq crq;
032c5e82 2875 unsigned long flags;
2f9de9ba 2876 int rc, detail_len;
032c5e82
TF		 2877
2878 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2879 if (!error_buff)
2880 return;
2881
2f9de9ba 2882 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2883 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2884 if (!error_buff->buff) {
2885 kfree(error_buff);
2886 return;
2887 }
2888
2889 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2890 DMA_FROM_DEVICE);
2891 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2892 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2893 kfree(error_buff->buff);
2894 kfree(error_buff);
2895 return;
2896 }
2897
032c5e82 2898 error_buff->len = detail_len;
2f9de9ba 2899 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2900
2901 spin_lock_irqsave(&adapter->error_list_lock, flags);
2902 list_add_tail(&error_buff->list, &adapter->errors);
2903 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2904
2f9de9ba
NF		 2905 memset(&crq, 0, sizeof(crq));
2906 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2907 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2908 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2909 crq.request_error_info.len = cpu_to_be32(detail_len);
2910 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2911
2912 rc = ibmvnic_send_crq(adapter, &crq);
2913 if (rc) {
2914 netdev_err(netdev, "failed to request error information\n");
2915 goto err_info_fail;
2916 }
2917
2918 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2919 netdev_err(netdev, "timeout waiting for error information\n");
2920 goto err_info_fail;
2921 }
2922
2923 return;
2924
2925err_info_fail:
2926 spin_lock_irqsave(&adapter->error_list_lock, flags);
2927 list_del(&error_buff->list);
2928 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2929
2930 kfree(error_buff->buff);
2931 kfree(error_buff);
2932}
2933
2934static void handle_error_indication(union ibmvnic_crq *crq,
2935 struct ibmvnic_adapter *adapter)
2936{
2937 struct device *dev = &adapter->vdev->dev;
2938
2939 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2940 crq->error_indication.flags
2941 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2942 be32_to_cpu(crq->error_indication.error_id),
2943 be16_to_cpu(crq->error_indication.error_cause));
2944
2945 if (be32_to_cpu(crq->error_indication.error_id))
2946 request_error_information(adapter, crq);
ed651a10
NF		 2947
2948 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2949 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 2950 else
2951 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 2952}
2953
2954static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2955 struct ibmvnic_adapter *adapter)
2956{
2957 struct net_device *netdev = adapter->netdev;
2958 struct device *dev = &adapter->vdev->dev;
2959 long rc;
2960
2961 rc = crq->change_mac_addr_rsp.rc.code;
2962 if (rc) {
2963 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2964 return;
2965 }
2966 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2967 ETH_ALEN);
2968}
2969
2970static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2971 struct ibmvnic_adapter *adapter)
2972{
2973 struct device *dev = &adapter->vdev->dev;
2974 u64 *req_value;
2975 char *name;
2976
901e040a 2977 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2978 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2979 case REQ_TX_QUEUES:
2980 req_value = &adapter->req_tx_queues;
2981 name = "tx";
2982 break;
2983 case REQ_RX_QUEUES:
2984 req_value = &adapter->req_rx_queues;
2985 name = "rx";
2986 break;
2987 case REQ_RX_ADD_QUEUES:
2988 req_value = &adapter->req_rx_add_queues;
2989 name = "rx_add";
2990 break;
2991 case REQ_TX_ENTRIES_PER_SUBCRQ:
2992 req_value = &adapter->req_tx_entries_per_subcrq;
2993 name = "tx_entries_per_subcrq";
2994 break;
2995 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2996 req_value = &adapter->req_rx_add_entries_per_subcrq;
2997 name = "rx_add_entries_per_subcrq";
2998 break;
2999 case REQ_MTU:
3000 req_value = &adapter->req_mtu;
3001 name = "mtu";
3002 break;
3003 case PROMISC_REQUESTED:
3004 req_value = &adapter->promisc;
3005 name = "promisc";
3006 break;
3007 default:
3008 dev_err(dev, "Got invalid cap request rsp %d\n",
3009 crq->request_capability.capability);
3010 return;
3011 }
3012
3013 switch (crq->request_capability_rsp.rc.code) {
3014 case SUCCESS:
3015 break;
3016 case PARTIALSUCCESS:
3017 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3018 *req_value,
28f4d165 3019 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 3020 number), name);
28f4d165 3021 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 3022 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 3023 return;
3024 default:
3025 dev_err(dev, "Error %d in request cap rsp\n",
3026 crq->request_capability_rsp.rc.code);
3027 return;
3028 }
3029
3030 /* Done receiving requested capabilities, query IP offload support */
901e040a 3031 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 3032 union ibmvnic_crq newcrq;
3033 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3034 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3035 &adapter->ip_offload_buf;
3036
249168ad 3037 adapter->wait_capability = false;
032c5e82
TF		 3038 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3039 buf_sz,
3040 DMA_FROM_DEVICE);
3041
3042 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3043 if (!firmware_has_feature(FW_FEATURE_CMO))
3044 dev_err(dev, "Couldn't map offload buffer\n");
3045 return;
3046 }
3047
3048 memset(&newcrq, 0, sizeof(newcrq));
3049 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3050 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3051 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3052 newcrq.query_ip_offload.ioba =
3053 cpu_to_be32(adapter->ip_offload_tok);
3054
3055 ibmvnic_send_crq(adapter, &newcrq);
3056 }
3057}
3058
3059static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3060 struct ibmvnic_adapter *adapter)
3061{
3062 struct device *dev = &adapter->vdev->dev;
3063 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3064 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 3065 int i;
3066
3067 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3068 DMA_BIDIRECTIONAL);
3069 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3070 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3071
498cd8e4
JA		 3072 /* If the number of queues requested can't be allocated by the
3073 * server, the login response will return with code 1. We will need
3074 * to resend the login buffer with fewer queues requested.
3075 */
3076 if (login_rsp_crq->generic.rc.code) {
3077 adapter->renegotiate = true;
3078 complete(&adapter->init_done);
3079 return 0;
3080 }
3081
032c5e82
TF		 3082 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3083 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3084 netdev_dbg(adapter->netdev, "%016lx\n",
3085 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3086 }
3087
3088 /* Sanity checks */
3089 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3090 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3091 adapter->req_rx_add_queues !=
3092 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3093 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3094 ibmvnic_remove(adapter->vdev);
3095 return -EIO;
3096 }
3097 complete(&adapter->init_done);
3098
032c5e82
TF		 3099 return 0;
3100}
3101
032c5e82
TF		 3102static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3103 struct ibmvnic_adapter *adapter)
3104{
3105 struct device *dev = &adapter->vdev->dev;
3106 long rc;
3107
3108 rc = crq->request_unmap_rsp.rc.code;
3109 if (rc)
3110 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3111}
3112
3113static void handle_query_map_rsp(union ibmvnic_crq *crq,
3114 struct ibmvnic_adapter *adapter)
3115{
3116 struct net_device *netdev = adapter->netdev;
3117 struct device *dev = &adapter->vdev->dev;
3118 long rc;
3119
3120 rc = crq->query_map_rsp.rc.code;
3121 if (rc) {
3122 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3123 return;
3124 }
3125 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3126 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3127 crq->query_map_rsp.free_pages);
3128}
3129
3130static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3131 struct ibmvnic_adapter *adapter)
3132{
3133 struct net_device *netdev = adapter->netdev;
3134 struct device *dev = &adapter->vdev->dev;
3135 long rc;
3136
901e040a 3137 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3138 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3139 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3140 rc = crq->query_capability.rc.code;
3141 if (rc) {
3142 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3143 goto out;
3144 }
3145
3146 switch (be16_to_cpu(crq->query_capability.capability)) {
3147 case MIN_TX_QUEUES:
3148 adapter->min_tx_queues =
de89e854 3149 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3150 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3151 adapter->min_tx_queues);
3152 break;
3153 case MIN_RX_QUEUES:
3154 adapter->min_rx_queues =
de89e854 3155 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3156 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3157 adapter->min_rx_queues);
3158 break;
3159 case MIN_RX_ADD_QUEUES:
3160 adapter->min_rx_add_queues =
de89e854 3161 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3162 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3163 adapter->min_rx_add_queues);
3164 break;
3165 case MAX_TX_QUEUES:
3166 adapter->max_tx_queues =
de89e854 3167 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3168 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3169 adapter->max_tx_queues);
3170 break;
3171 case MAX_RX_QUEUES:
3172 adapter->max_rx_queues =
de89e854 3173 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3174 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3175 adapter->max_rx_queues);
3176 break;
3177 case MAX_RX_ADD_QUEUES:
3178 adapter->max_rx_add_queues =
de89e854 3179 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3180 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3181 adapter->max_rx_add_queues);
3182 break;
3183 case MIN_TX_ENTRIES_PER_SUBCRQ:
3184 adapter->min_tx_entries_per_subcrq =
de89e854 3185 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3186 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3187 adapter->min_tx_entries_per_subcrq);
3188 break;
3189 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3190 adapter->min_rx_add_entries_per_subcrq =
de89e854 3191 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3192 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3193 adapter->min_rx_add_entries_per_subcrq);
3194 break;
3195 case MAX_TX_ENTRIES_PER_SUBCRQ:
3196 adapter->max_tx_entries_per_subcrq =
de89e854 3197 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3198 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3199 adapter->max_tx_entries_per_subcrq);
3200 break;
3201 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3202 adapter->max_rx_add_entries_per_subcrq =
de89e854 3203 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3204 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3205 adapter->max_rx_add_entries_per_subcrq);
3206 break;
3207 case TCP_IP_OFFLOAD:
3208 adapter->tcp_ip_offload =
de89e854 3209 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3210 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3211 adapter->tcp_ip_offload);
3212 break;
3213 case PROMISC_SUPPORTED:
3214 adapter->promisc_supported =
de89e854 3215 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3216 netdev_dbg(netdev, "promisc_supported = %lld\n",
3217 adapter->promisc_supported);
3218 break;
3219 case MIN_MTU:
de89e854 3220 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3221 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3222 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3223 break;
3224 case MAX_MTU:
de89e854 3225 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3226 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3227 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3228 break;
3229 case MAX_MULTICAST_FILTERS:
3230 adapter->max_multicast_filters =
de89e854 3231 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3232 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3233 adapter->max_multicast_filters);
3234 break;
3235 case VLAN_HEADER_INSERTION:
3236 adapter->vlan_header_insertion =
de89e854 3237 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3238 if (adapter->vlan_header_insertion)
3239 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3240 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3241 adapter->vlan_header_insertion);
3242 break;
6052d5e2
MFV		 3243 case RX_VLAN_HEADER_INSERTION:
3244 adapter->rx_vlan_header_insertion =
3245 be64_to_cpu(crq->query_capability.number);
3246 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3247 adapter->rx_vlan_header_insertion);
3248 break;
032c5e82
TF		 3249 case MAX_TX_SG_ENTRIES:
3250 adapter->max_tx_sg_entries =
de89e854 3251 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3252 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3253 adapter->max_tx_sg_entries);
3254 break;
3255 case RX_SG_SUPPORTED:
3256 adapter->rx_sg_supported =
de89e854 3257 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3258 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3259 adapter->rx_sg_supported);
3260 break;
3261 case OPT_TX_COMP_SUB_QUEUES:
3262 adapter->opt_tx_comp_sub_queues =
de89e854 3263 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3264 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3265 adapter->opt_tx_comp_sub_queues);
3266 break;
3267 case OPT_RX_COMP_QUEUES:
3268 adapter->opt_rx_comp_queues =
de89e854 3269 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3270 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3271 adapter->opt_rx_comp_queues);
3272 break;
3273 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3274 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3275 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3276 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3277 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3278 break;
3279 case OPT_TX_ENTRIES_PER_SUBCRQ:
3280 adapter->opt_tx_entries_per_subcrq =
de89e854 3281 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3282 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3283 adapter->opt_tx_entries_per_subcrq);
3284 break;
3285 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3286 adapter->opt_rxba_entries_per_subcrq =
de89e854 3287 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3288 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3289 adapter->opt_rxba_entries_per_subcrq);
3290 break;
3291 case TX_RX_DESC_REQ:
3292 adapter->tx_rx_desc_req = crq->query_capability.number;
3293 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3294 adapter->tx_rx_desc_req);
3295 break;
3296
3297 default:
3298 netdev_err(netdev, "Got invalid cap rsp %d\n",
3299 crq->query_capability.capability);
3300 }
3301
3302out:
249168ad
TF		 3303 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3304 adapter->wait_capability = false;
d346b9bc 3305 ibmvnic_send_req_caps(adapter, 0);
249168ad 3306 }
032c5e82
TF		 3307}
3308
032c5e82
TF		 3309static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3310 struct ibmvnic_adapter *adapter)
3311{
3312 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3313 struct net_device *netdev = adapter->netdev;
3314 struct device *dev = &adapter->vdev->dev;
993a82b0 3315 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3316 long rc;
3317
3318 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3319 (unsigned long int)cpu_to_be64(u64_crq[0]),
3320 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3321 switch (gen_crq->first) {
3322 case IBMVNIC_CRQ_INIT_RSP:
3323 switch (gen_crq->cmd) {
3324 case IBMVNIC_CRQ_INIT:
3325 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3326 adapter->from_passive_init = true;
3327 complete(&adapter->init_done);
032c5e82
TF		 3328 break;
3329 case IBMVNIC_CRQ_INIT_COMPLETE:
3330 dev_info(dev, "Partner initialization complete\n");
3331 send_version_xchg(adapter);
3332 break;
3333 default:
3334 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3335 }
3336 return;
3337 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3338 netif_carrier_off(netdev);
032c5e82 3339 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3340 dev_info(dev, "Migrated, re-enabling adapter\n");
3341 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3342 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3343 dev_info(dev, "Backing device failover detected\n");
ed651a10 3344 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3345 } else {
3346 /* The adapter lost the connection */
3347 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3348 gen_crq->cmd);
ed651a10 3349 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3350 }
3351 return;
3352 case IBMVNIC_CRQ_CMD_RSP:
3353 break;
3354 default:
3355 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3356 gen_crq->first);
3357 return;
3358 }
3359
3360 switch (gen_crq->cmd) {
3361 case VERSION_EXCHANGE_RSP:
3362 rc = crq->version_exchange_rsp.rc.code;
3363 if (rc) {
3364 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3365 break;
3366 }
3367 dev_info(dev, "Partner protocol version is %d\n",
3368 crq->version_exchange_rsp.version);
3369 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3370 ibmvnic_version)
3371 ibmvnic_version =
3372 be16_to_cpu(crq->version_exchange_rsp.version);
3373 send_cap_queries(adapter);
3374 break;
3375 case QUERY_CAPABILITY_RSP:
3376 handle_query_cap_rsp(crq, adapter);
3377 break;
3378 case QUERY_MAP_RSP:
3379 handle_query_map_rsp(crq, adapter);
3380 break;
3381 case REQUEST_MAP_RSP:
f3be0cbc
TF		 3382 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3383 complete(&adapter->fw_done);
032c5e82
TF		 3384 break;
3385 case REQUEST_UNMAP_RSP:
3386 handle_request_unmap_rsp(crq, adapter);
3387 break;
3388 case REQUEST_CAPABILITY_RSP:
3389 handle_request_cap_rsp(crq, adapter);
3390 break;
3391 case LOGIN_RSP:
3392 netdev_dbg(netdev, "Got Login Response\n");
3393 handle_login_rsp(crq, adapter);
3394 break;
3395 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3396 netdev_dbg(netdev,
3397 "Got Logical Link State Response, state: %d rc: %d\n",
3398 crq->logical_link_state_rsp.link_state,
3399 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3400 adapter->logical_link_state =
3401 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3402 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3403 complete(&adapter->init_done);
032c5e82
TF		 3404 break;
3405 case LINK_STATE_INDICATION:
3406 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3407 adapter->phys_link_state =
3408 crq->link_state_indication.phys_link_state;
3409 adapter->logical_link_state =
3410 crq->link_state_indication.logical_link_state;
3411 break;
3412 case CHANGE_MAC_ADDR_RSP:
3413 netdev_dbg(netdev, "Got MAC address change Response\n");
3414 handle_change_mac_rsp(crq, adapter);
3415 break;
3416 case ERROR_INDICATION:
3417 netdev_dbg(netdev, "Got Error Indication\n");
3418 handle_error_indication(crq, adapter);
3419 break;
3420 case REQUEST_ERROR_RSP:
3421 netdev_dbg(netdev, "Got Error Detail Response\n");
3422 handle_error_info_rsp(crq, adapter);
3423 break;
3424 case REQUEST_STATISTICS_RSP:
3425 netdev_dbg(netdev, "Got Statistics Response\n");
3426 complete(&adapter->stats_done);
3427 break;
032c5e82
TF		 3428 case QUERY_IP_OFFLOAD_RSP:
3429 netdev_dbg(netdev, "Got Query IP offload Response\n");
3430 handle_query_ip_offload_rsp(adapter);
3431 break;
3432 case MULTICAST_CTRL_RSP:
3433 netdev_dbg(netdev, "Got multicast control Response\n");
3434 break;
3435 case CONTROL_IP_OFFLOAD_RSP:
3436 netdev_dbg(netdev, "Got Control IP offload Response\n");
3437 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3438 sizeof(adapter->ip_offload_ctrl),
3439 DMA_TO_DEVICE);
bd0b6723 3440 complete(&adapter->init_done);
032c5e82 3441 break;
032c5e82
TF		 3442 case COLLECT_FW_TRACE_RSP:
3443 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3444 complete(&adapter->fw_done);
3445 break;
3446 default:
3447 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3448 gen_crq->cmd);
3449 }
3450}
3451
3452static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3453{
3454 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3455
6c267b3d 3456 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3457 return IRQ_HANDLED;
3458}
3459
3460static void ibmvnic_tasklet(void *data)
3461{
3462 struct ibmvnic_adapter *adapter = data;
032c5e82 3463 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3464 union ibmvnic_crq *crq;
3465 unsigned long flags;
3466 bool done = false;
3467
3468 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3469 while (!done) {
3470 /* Pull all the valid messages off the CRQ */
3471 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3472 ibmvnic_handle_crq(crq, adapter);
3473 crq->generic.first = 0;
3474 }
ed7ecbf7
BK		 3475
3476 /* remain in tasklet until all
3477 * capabilities responses are received
3478 */
3479 if (!adapter->wait_capability)
3480 done = true;
032c5e82 3481 }
249168ad
TF		 3482 /* if capabilities CRQ's were sent in this tasklet, the following
3483 * tasklet must wait until all responses are received
3484 */
3485 if (atomic_read(&adapter->running_cap_crqs) != 0)
3486 adapter->wait_capability = true;
032c5e82 3487 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3488}
3489
3490static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3491{
3492 struct vio_dev *vdev = adapter->vdev;
3493 int rc;
3494
3495 do {
3496 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3497 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3498
3499 if (rc)
3500 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3501
3502 return rc;
3503}
3504
3505static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3506{
3507 struct ibmvnic_crq_queue *crq = &adapter->crq;
3508 struct device *dev = &adapter->vdev->dev;
3509 struct vio_dev *vdev = adapter->vdev;
3510 int rc;
3511
3512 /* Close the CRQ */
3513 do {
3514 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3515 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3516
3517 /* Clean out the queue */
3518 memset(crq->msgs, 0, PAGE_SIZE);
3519 crq->cur = 0;
3520
3521 /* And re-open it again */
3522 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3523 crq->msg_token, PAGE_SIZE);
3524
3525 if (rc == H_CLOSED)
3526 /* Adapter is good, but other end is not ready */
3527 dev_warn(dev, "Partner adapter not ready\n");
3528 else if (rc != 0)
3529 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3530
3531 return rc;
3532}
3533
f992887c 3534static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3535{
3536 struct ibmvnic_crq_queue *crq = &adapter->crq;
3537 struct vio_dev *vdev = adapter->vdev;
3538 long rc;
3539
f992887c
NF		 3540 if (!crq->msgs)
3541 return;
3542
032c5e82
TF		 3543 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3544 free_irq(vdev->irq, adapter);
6c267b3d 3545 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3546 do {
3547 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3548 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3549
3550 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3551 DMA_BIDIRECTIONAL);
3552 free_page((unsigned long)crq->msgs);
f992887c 3553 crq->msgs = NULL;
032c5e82
TF		 3554}
3555
f992887c 3556static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3557{
3558 struct ibmvnic_crq_queue *crq = &adapter->crq;
3559 struct device *dev = &adapter->vdev->dev;
3560 struct vio_dev *vdev = adapter->vdev;
3561 int rc, retrc = -ENOMEM;
3562
f992887c
NF		 3563 if (crq->msgs)
3564 return 0;
3565
032c5e82
TF		 3566 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3567 /* Should we allocate more than one page? */
3568
3569 if (!crq->msgs)
3570 return -ENOMEM;
3571
3572 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3573 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3574 DMA_BIDIRECTIONAL);
3575 if (dma_mapping_error(dev, crq->msg_token))
3576 goto map_failed;
3577
3578 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3579 crq->msg_token, PAGE_SIZE);
3580
3581 if (rc == H_RESOURCE)
3582 /* maybe kexecing and resource is busy. try a reset */
3583 rc = ibmvnic_reset_crq(adapter);
3584 retrc = rc;
3585
3586 if (rc == H_CLOSED) {
3587 dev_warn(dev, "Partner adapter not ready\n");
3588 } else if (rc) {
3589 dev_warn(dev, "Error %d opening adapter\n", rc);
3590 goto reg_crq_failed;
3591 }
3592
3593 retrc = 0;
3594
6c267b3d
TF		 3595 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3596 (unsigned long)adapter);
3597
032c5e82
TF		 3598 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3599 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3600 adapter);
3601 if (rc) {
3602 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3603 vdev->irq, rc);
3604 goto req_irq_failed;
3605 }
3606
3607 rc = vio_enable_interrupts(vdev);
3608 if (rc) {
3609 dev_err(dev, "Error %d enabling interrupts\n", rc);
3610 goto req_irq_failed;
3611 }
3612
3613 crq->cur = 0;
3614 spin_lock_init(&crq->lock);
3615
3616 return retrc;
3617
3618req_irq_failed:
6c267b3d 3619 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3620 do {
3621 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3622 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3623reg_crq_failed:
3624 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3625map_failed:
3626 free_page((unsigned long)crq->msgs);
f992887c 3627 crq->msgs = NULL;
032c5e82
TF		 3628 return retrc;
3629}
3630
f6ef6408 3631static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3632{
f6ef6408 3633 struct device *dev = &adapter->vdev->dev;
ea22d51a 3634 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3635 int rc;
3636
28cde751
NF		 3637 if (adapter->resetting) {
3638 rc = ibmvnic_reset_crq(adapter);
3639 if (!rc)
3640 rc = vio_enable_interrupts(adapter->vdev);
3641 } else {
3642 rc = init_crq_queue(adapter);
3643 }
3644
f6ef6408
JA		 3645 if (rc) {
3646 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3647 return rc;
3648 }
3649
017892c1
JA		 3650 adapter->from_passive_init = false;
3651
f6ef6408 3652 init_completion(&adapter->init_done);
6a2fb0e9 3653 adapter->init_done_rc = 0;
f6ef6408
JA		 3654 ibmvnic_send_crq_init(adapter);
3655 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3656 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 3657 return -1;
3658 }
3659
6a2fb0e9
NF		 3660 if (adapter->init_done_rc) {
3661 release_crq_queue(adapter);
3662 return adapter->init_done_rc;
3663 }
3664
017892c1
JA		 3665 if (adapter->from_passive_init) {
3666 adapter->state = VNIC_OPEN;
3667 adapter->from_passive_init = false;
f6ef6408
JA		 3668 return -1;
3669 }
3670
57a49436
NF		 3671 if (adapter->resetting)
3672 rc = reset_sub_crq_queues(adapter);
3673 else
3674 rc = init_sub_crqs(adapter);
1bb3c739
NF		 3675 if (rc) {
3676 dev_err(dev, "Initialization of sub crqs failed\n");
3677 release_crq_queue(adapter);
5df969c3
TF		 3678 return rc;
3679 }
3680
3681 rc = init_sub_crq_irqs(adapter);
3682 if (rc) {
3683 dev_err(dev, "Failed to initialize sub crq irqs\n");
3684 release_crq_queue(adapter);
1bb3c739
NF		 3685 }
3686
3687 return rc;
f6ef6408
JA		 3688}
3689
40c9db8a
TF		 3690static struct device_attribute dev_attr_failover;
3691
f6ef6408
JA		 3692static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3693{
032c5e82
TF		 3694 struct ibmvnic_adapter *adapter;
3695 struct net_device *netdev;
3696 unsigned char *mac_addr_p;
032c5e82
TF		 3697 int rc;
3698
3699 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3700 dev->unit_address);
3701
3702 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3703 VETH_MAC_ADDR, NULL);
3704 if (!mac_addr_p) {
3705 dev_err(&dev->dev,
3706 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3707 __FILE__, __LINE__);
3708 return 0;
3709 }
3710
3711 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3712 IBMVNIC_MAX_TX_QUEUES);
3713 if (!netdev)
3714 return -ENOMEM;
3715
3716 adapter = netdev_priv(netdev);
90c8014c 3717 adapter->state = VNIC_PROBING;
032c5e82
TF		 3718 dev_set_drvdata(&dev->dev, netdev);
3719 adapter->vdev = dev;
3720 adapter->netdev = netdev;
3721
3722 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3723 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3724 netdev->irq = dev->irq;
3725 netdev->netdev_ops = &ibmvnic_netdev_ops;
3726 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3727 SET_NETDEV_DEV(netdev, &dev->dev);
3728
3729 spin_lock_init(&adapter->stats_lock);
3730
032c5e82 3731 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3732 spin_lock_init(&adapter->error_list_lock);
032c5e82 3733
ed651a10
NF		 3734 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3735 INIT_LIST_HEAD(&adapter->rwi_list);
3736 mutex_init(&adapter->reset_lock);
3737 mutex_init(&adapter->rwi_lock);
3738 adapter->resetting = false;
3739
6a2fb0e9
NF		 3740 do {
3741 rc = ibmvnic_init(adapter);
6d659237 3742 if (rc && rc != EAGAIN) {
6a2fb0e9
NF		 3743 free_netdev(netdev);
3744 return rc;
3745 }
3746 } while (rc == EAGAIN);
032c5e82 3747
f39f0d1e 3748 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82 3749
40c9db8a
TF		 3750 rc = device_create_file(&dev->dev, &dev_attr_failover);
3751 if (rc) {
3752 free_netdev(netdev);
3753 return rc;
3754 }
3755
032c5e82
TF		 3756 rc = register_netdev(netdev);
3757 if (rc) {
3758 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
40c9db8a 3759 device_remove_file(&dev->dev, &dev_attr_failover);
f6ef6408
JA		 3760 free_netdev(netdev);
3761 return rc;
032c5e82
TF		 3762 }
3763 dev_info(&dev->dev, "ibmvnic registered\n");
3764
90c8014c 3765 adapter->state = VNIC_PROBED;
032c5e82 3766 return 0;
032c5e82
TF		 3767}
3768
3769static int ibmvnic_remove(struct vio_dev *dev)
3770{
3771 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3772 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3773
90c8014c 3774 adapter->state = VNIC_REMOVING;
032c5e82 3775 unregister_netdev(netdev);
ed651a10 3776 mutex_lock(&adapter->reset_lock);
37489055
NF		 3777
3778 release_resources(adapter);
3779 release_sub_crqs(adapter);
3780 release_crq_queue(adapter);
3781
90c8014c
NF		 3782 adapter->state = VNIC_REMOVED;
3783
ed651a10 3784 mutex_unlock(&adapter->reset_lock);
40c9db8a 3785 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 3786 free_netdev(netdev);
3787 dev_set_drvdata(&dev->dev, NULL);
3788
3789 return 0;
3790}
3791
40c9db8a
TF		 3792static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3793 const char *buf, size_t count)
3794{
3795 struct net_device *netdev = dev_get_drvdata(dev);
3796 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3797 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3798 __be64 session_token;
3799 long rc;
3800
3801 if (!sysfs_streq(buf, "1"))
3802 return -EINVAL;
3803
3804 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
3805 H_GET_SESSION_TOKEN, 0, 0, 0);
3806 if (rc) {
3807 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
3808 rc);
3809 return -EINVAL;
3810 }
3811
3812 session_token = (__be64)retbuf[0];
3813 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
3814 be64_to_cpu(session_token));
3815 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3816 H_SESSION_ERR_DETECTED, session_token, 0, 0);
3817 if (rc) {
3818 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
3819 rc);
3820 return -EINVAL;
3821 }
3822
3823 return count;
3824}
3825
3826static DEVICE_ATTR(failover, 0200, NULL, failover_store);
3827
032c5e82
TF		 3828static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3829{
3830 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3831 struct ibmvnic_adapter *adapter;
3832 struct iommu_table *tbl;
3833 unsigned long ret = 0;
3834 int i;
3835
3836 tbl = get_iommu_table_base(&vdev->dev);
3837
3838 /* netdev inits at probe time along with the structures we need below*/
3839 if (!netdev)
3840 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3841
3842 adapter = netdev_priv(netdev);
3843
3844 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3845 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3846
3847 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3848 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3849
3850 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3851 i++)
3852 ret += adapter->rx_pool[i].size *
3853 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3854
3855 return ret;
3856}
3857
3858static int ibmvnic_resume(struct device *dev)
3859{
3860 struct net_device *netdev = dev_get_drvdata(dev);
3861 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3862 int i;
3863
cb89ba24
JA		 3864 if (adapter->state != VNIC_OPEN)
3865 return 0;
3866
032c5e82
TF		 3867 /* kick the interrupt handlers just in case we lost an interrupt */
3868 for (i = 0; i < adapter->req_rx_queues; i++)
3869 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3870 adapter->rx_scrq[i]);
3871
3872 return 0;
3873}
3874
3875static struct vio_device_id ibmvnic_device_table[] = {
3876 {"network", "IBM,vnic"},
3877 {"", "" }
3878};
3879MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3880
3881static const struct dev_pm_ops ibmvnic_pm_ops = {
3882 .resume = ibmvnic_resume
3883};
3884
3885static struct vio_driver ibmvnic_driver = {
3886 .id_table = ibmvnic_device_table,
3887 .probe = ibmvnic_probe,
3888 .remove = ibmvnic_remove,
3889 .get_desired_dma = ibmvnic_get_desired_dma,
3890 .name = ibmvnic_driver_name,
3891 .pm = &ibmvnic_pm_ops,
3892};
3893
3894/* module functions */
3895static int __init ibmvnic_module_init(void)
3896{
3897 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3898 IBMVNIC_DRIVER_VERSION);
3899
3900 return vio_register_driver(&ibmvnic_driver);
3901}
3902
3903static void __exit ibmvnic_module_exit(void)
3904{
3905 vio_unregister_driver(&ibmvnic_driver);
3906}
3907
3908module_init(ibmvnic_module_init);
3909module_exit(ibmvnic_module_exit);
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