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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux.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 ([email protected]) */
6/* Thomas Falcon ([email protected]) */
7/* John Allen ([email protected]) */
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>
4eb50ceb 62#include <linux/if_arp.h>
032c5e82
TF		 63#include <linux/in.h>
64#include <linux/ip.h>
ad7775dc 65#include <linux/ipv6.h>
032c5e82
TF		 66#include <linux/irq.h>
67#include <linux/kthread.h>
68#include <linux/seq_file.h>
032c5e82
TF		 69#include <linux/interrupt.h>
70#include <net/net_namespace.h>
71#include <asm/hvcall.h>
72#include <linux/atomic.h>
73#include <asm/vio.h>
74#include <asm/iommu.h>
75#include <linux/uaccess.h>
76#include <asm/firmware.h>
65dc6891 77#include <linux/workqueue.h>
6052d5e2 78#include <linux/if_vlan.h>
37798d02 79#include <linux/utsname.h>
032c5e82
TF		 80
81#include "ibmvnic.h"
82
83static const char ibmvnic_driver_name[] = "ibmvnic";
84static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
85
78b07ac1 86MODULE_AUTHOR("Santiago Leon");
032c5e82
TF		 87MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88MODULE_LICENSE("GPL");
89MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
90
91static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92static int ibmvnic_remove(struct vio_dev *);
d7c0ef36 93static void release_sub_crqs(struct ibmvnic_adapter *, bool);
032c5e82
TF		 94static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
ad7775dc 100static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 101static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110static int ibmvnic_poll(struct napi_struct *napi, int data);
111static void send_map_query(struct ibmvnic_adapter *adapter);
9c4eaabd
TF		 112static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113static int send_request_unmap(struct ibmvnic_adapter *, u8);
20a8ab74 114static int send_login(struct ibmvnic_adapter *adapter);
bd0b6723 115static void send_cap_queries(struct ibmvnic_adapter *adapter);
4d96f12a 116static int init_sub_crqs(struct ibmvnic_adapter *);
bd0b6723 117static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 118static int ibmvnic_init(struct ibmvnic_adapter *);
8a348450 119static int ibmvnic_reset_init(struct ibmvnic_adapter *);
f992887c 120static void release_crq_queue(struct ibmvnic_adapter *);
c26eba03 121static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
30f79625 122static int init_crq_queue(struct ibmvnic_adapter *adapter);
032c5e82
TF		 123
124struct ibmvnic_stat {
125 char name[ETH_GSTRING_LEN];
126 int offset;
127};
128
129#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
130 offsetof(struct ibmvnic_statistics, stat))
131#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
132
133static const struct ibmvnic_stat ibmvnic_stats[] = {
134 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
135 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
136 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
137 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
138 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
139 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
140 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
141 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
142 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
143 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
144 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
145 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
146 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
147 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
148 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
149 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
150 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
151 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
152 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
153 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
154 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
155 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
156};
157
158static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
159 unsigned long length, unsigned long *number,
160 unsigned long *irq)
161{
162 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
163 long rc;
164
165 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
166 *number = retbuf[0];
167 *irq = retbuf[1];
168
169 return rc;
170}
171
032c5e82
TF		 172static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
173 struct ibmvnic_long_term_buff *ltb, int size)
174{
175 struct device *dev = &adapter->vdev->dev;
9c4eaabd 176 int rc;
032c5e82
TF		 177
178 ltb->size = size;
179 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
180 GFP_KERNEL);
181
182 if (!ltb->buff) {
183 dev_err(dev, "Couldn't alloc long term buffer\n");
184 return -ENOMEM;
185 }
186 ltb->map_id = adapter->map_id;
187 adapter->map_id++;
db5d0b59
NF		 188
189 init_completion(&adapter->fw_done);
9c4eaabd
TF		 190 rc = send_request_map(adapter, ltb->addr,
191 ltb->size, ltb->map_id);
192 if (rc) {
193 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
194 return rc;
195 }
032c5e82 196 wait_for_completion(&adapter->fw_done);
f3be0cbc
TF		 197
198 if (adapter->fw_done_rc) {
199 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
200 adapter->fw_done_rc);
4cf2ddf3 201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
f3be0cbc
TF		 202 return -1;
203 }
032c5e82
TF		 204 return 0;
205}
206
207static void free_long_term_buff(struct ibmvnic_adapter *adapter,
208 struct ibmvnic_long_term_buff *ltb)
209{
210 struct device *dev = &adapter->vdev->dev;
211
c657e32c
NF		 212 if (!ltb->buff)
213 return;
214
ed651a10
NF		 215 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
216 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 217 send_request_unmap(adapter, ltb->map_id);
59af56c2 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 219}
220
f3be0cbc
TF		 221static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
222 struct ibmvnic_long_term_buff *ltb)
223{
9c4eaabd
TF		 224 int rc;
225
f3be0cbc
TF		 226 memset(ltb->buff, 0, ltb->size);
227
228 init_completion(&adapter->fw_done);
9c4eaabd
TF		 229 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
230 if (rc)
231 return rc;
f3be0cbc
TF		 232 wait_for_completion(&adapter->fw_done);
233
234 if (adapter->fw_done_rc) {
235 dev_info(&adapter->vdev->dev,
236 "Reset failed, attempting to free and reallocate buffer\n");
237 free_long_term_buff(adapter, ltb);
238 return alloc_long_term_buff(adapter, ltb, ltb->size);
239 }
240 return 0;
241}
242
f185a49a
TF		 243static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
244{
245 int i;
246
247 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
248 i++)
249 adapter->rx_pool[i].active = 0;
250}
251
032c5e82
TF		 252static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
253 struct ibmvnic_rx_pool *pool)
254{
255 int count = pool->size - atomic_read(&pool->available);
256 struct device *dev = &adapter->vdev->dev;
257 int buffers_added = 0;
258 unsigned long lpar_rc;
259 union sub_crq sub_crq;
260 struct sk_buff *skb;
261 unsigned int offset;
262 dma_addr_t dma_addr;
263 unsigned char *dst;
264 u64 *handle_array;
265 int shift = 0;
266 int index;
267 int i;
268
f185a49a
TF		 269 if (!pool->active)
270 return;
271
032c5e82
TF		 272 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
273 be32_to_cpu(adapter->login_rsp_buf->
274 off_rxadd_subcrqs));
275
276 for (i = 0; i < count; ++i) {
277 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
278 if (!skb) {
279 dev_err(dev, "Couldn't replenish rx buff\n");
280 adapter->replenish_no_mem++;
281 break;
282 }
283
284 index = pool->free_map[pool->next_free];
285
286 if (pool->rx_buff[index].skb)
287 dev_err(dev, "Inconsistent free_map!\n");
288
289 /* Copy the skb to the long term mapped DMA buffer */
290 offset = index * pool->buff_size;
291 dst = pool->long_term_buff.buff + offset;
292 memset(dst, 0, pool->buff_size);
293 dma_addr = pool->long_term_buff.addr + offset;
294 pool->rx_buff[index].data = dst;
295
296 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
297 pool->rx_buff[index].dma = dma_addr;
298 pool->rx_buff[index].skb = skb;
299 pool->rx_buff[index].pool_index = pool->index;
300 pool->rx_buff[index].size = pool->buff_size;
301
302 memset(&sub_crq, 0, sizeof(sub_crq));
303 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
304 sub_crq.rx_add.correlator =
305 cpu_to_be64((u64)&pool->rx_buff[index]);
306 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
307 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
308
309 /* The length field of the sCRQ is defined to be 24 bits so the
310 * buffer size needs to be left shifted by a byte before it is
311 * converted to big endian to prevent the last byte from being
312 * truncated.
313 */
314#ifdef __LITTLE_ENDIAN__
315 shift = 8;
316#endif
317 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
318
319 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
320 &sub_crq);
321 if (lpar_rc != H_SUCCESS)
322 goto failure;
323
324 buffers_added++;
325 adapter->replenish_add_buff_success++;
326 pool->next_free = (pool->next_free + 1) % pool->size;
327 }
328 atomic_add(buffers_added, &pool->available);
329 return;
330
331failure:
2d14d379
TF		 332 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
333 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
032c5e82
TF		 334 pool->free_map[pool->next_free] = index;
335 pool->rx_buff[index].skb = NULL;
032c5e82
TF		 336
337 dev_kfree_skb_any(skb);
338 adapter->replenish_add_buff_failure++;
339 atomic_add(buffers_added, &pool->available);
f185a49a 340
5a18e1e0 341 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
f185a49a 342 /* Disable buffer pool replenishment and report carrier off if
5a18e1e0
TF		 343 * queue is closed or pending failover.
344 * Firmware guarantees that a signal will be sent to the
345 * driver, triggering a reset.
f185a49a
TF		 346 */
347 deactivate_rx_pools(adapter);
348 netif_carrier_off(adapter->netdev);
349 }
032c5e82
TF		 350}
351
352static void replenish_pools(struct ibmvnic_adapter *adapter)
353{
354 int i;
355
032c5e82
TF		 356 adapter->replenish_task_cycles++;
357 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
358 i++) {
359 if (adapter->rx_pool[i].active)
360 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
361 }
362}
363
3d52b594
JA		 364static void release_stats_buffers(struct ibmvnic_adapter *adapter)
365{
366 kfree(adapter->tx_stats_buffers);
367 kfree(adapter->rx_stats_buffers);
b0992eca
TF		 368 adapter->tx_stats_buffers = NULL;
369 adapter->rx_stats_buffers = NULL;
3d52b594
JA		 370}
371
372static int init_stats_buffers(struct ibmvnic_adapter *adapter)
373{
374 adapter->tx_stats_buffers =
abcae546 375 kcalloc(IBMVNIC_MAX_QUEUES,
3d52b594
JA		 376 sizeof(struct ibmvnic_tx_queue_stats),
377 GFP_KERNEL);
378 if (!adapter->tx_stats_buffers)
379 return -ENOMEM;
380
381 adapter->rx_stats_buffers =
abcae546 382 kcalloc(IBMVNIC_MAX_QUEUES,
3d52b594
JA		 383 sizeof(struct ibmvnic_rx_queue_stats),
384 GFP_KERNEL);
385 if (!adapter->rx_stats_buffers)
386 return -ENOMEM;
387
388 return 0;
389}
390
7bbc27a4
NF		 391static void release_stats_token(struct ibmvnic_adapter *adapter)
392{
393 struct device *dev = &adapter->vdev->dev;
394
395 if (!adapter->stats_token)
396 return;
397
398 dma_unmap_single(dev, adapter->stats_token,
399 sizeof(struct ibmvnic_statistics),
400 DMA_FROM_DEVICE);
401 adapter->stats_token = 0;
402}
403
404static int init_stats_token(struct ibmvnic_adapter *adapter)
405{
406 struct device *dev = &adapter->vdev->dev;
407 dma_addr_t stok;
408
409 stok = dma_map_single(dev, &adapter->stats,
410 sizeof(struct ibmvnic_statistics),
411 DMA_FROM_DEVICE);
412 if (dma_mapping_error(dev, stok)) {
413 dev_err(dev, "Couldn't map stats buffer\n");
414 return -1;
415 }
416
417 adapter->stats_token = stok;
d1cf33d9 418 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
7bbc27a4
NF		 419 return 0;
420}
421
8c0543ad
NF		 422static int reset_rx_pools(struct ibmvnic_adapter *adapter)
423{
424 struct ibmvnic_rx_pool *rx_pool;
425 int rx_scrqs;
f3be0cbc 426 int i, j, rc;
896d8695
JA		 427 u64 *size_array;
428
429 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
430 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
8c0543ad
NF		 431
432 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
433 for (i = 0; i < rx_scrqs; i++) {
434 rx_pool = &adapter->rx_pool[i];
435
d1cf33d9
NF		 436 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
437
896d8695
JA		 438 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
439 free_long_term_buff(adapter, &rx_pool->long_term_buff);
440 rx_pool->buff_size = be64_to_cpu(size_array[i]);
441 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
442 rx_pool->size *
443 rx_pool->buff_size);
444 } else {
445 rc = reset_long_term_buff(adapter,
446 &rx_pool->long_term_buff);
447 }
448
f3be0cbc
TF		 449 if (rc)
450 return rc;
8c0543ad
NF		 451
452 for (j = 0; j < rx_pool->size; j++)
453 rx_pool->free_map[j] = j;
454
455 memset(rx_pool->rx_buff, 0,
456 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
457
458 atomic_set(&rx_pool->available, 0);
459 rx_pool->next_alloc = 0;
460 rx_pool->next_free = 0;
c3e53b9a 461 rx_pool->active = 1;
8c0543ad
NF		 462 }
463
464 return 0;
465}
466
0ffe2cb7 467static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 468{
0ffe2cb7 469 struct ibmvnic_rx_pool *rx_pool;
0ffe2cb7 470 int i, j;
032c5e82 471
0ffe2cb7 472 if (!adapter->rx_pool)
032c5e82
TF		 473 return;
474
82e3be32 475 for (i = 0; i < adapter->num_active_rx_pools; i++) {
0ffe2cb7
NF		 476 rx_pool = &adapter->rx_pool[i];
477
d1cf33d9
NF		 478 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
479
0ffe2cb7
NF		 480 kfree(rx_pool->free_map);
481 free_long_term_buff(adapter, &rx_pool->long_term_buff);
482
483 if (!rx_pool->rx_buff)
e0ebe942 484 continue;
0ffe2cb7
NF		 485
486 for (j = 0; j < rx_pool->size; j++) {
487 if (rx_pool->rx_buff[j].skb) {
b7cdec3d
TF		 488 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
489 rx_pool->rx_buff[j].skb = NULL;
0ffe2cb7
NF		 490 }
491 }
492
493 kfree(rx_pool->rx_buff);
494 }
495
496 kfree(adapter->rx_pool);
497 adapter->rx_pool = NULL;
82e3be32 498 adapter->num_active_rx_pools = 0;
0ffe2cb7
NF		 499}
500
501static int init_rx_pools(struct net_device *netdev)
502{
503 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
504 struct device *dev = &adapter->vdev->dev;
505 struct ibmvnic_rx_pool *rx_pool;
506 int rxadd_subcrqs;
507 u64 *size_array;
508 int i, j;
509
510 rxadd_subcrqs =
511 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
512 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
513 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
514
515 adapter->rx_pool = kcalloc(rxadd_subcrqs,
516 sizeof(struct ibmvnic_rx_pool),
517 GFP_KERNEL);
518 if (!adapter->rx_pool) {
519 dev_err(dev, "Failed to allocate rx pools\n");
520 return -1;
521 }
522
82e3be32
NF		 523 adapter->num_active_rx_pools = rxadd_subcrqs;
524
0ffe2cb7
NF		 525 for (i = 0; i < rxadd_subcrqs; i++) {
526 rx_pool = &adapter->rx_pool[i];
527
528 netdev_dbg(adapter->netdev,
d1cf33d9 529 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
0ffe2cb7
NF		 530 i, adapter->req_rx_add_entries_per_subcrq,
531 be64_to_cpu(size_array[i]));
532
533 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
534 rx_pool->index = i;
535 rx_pool->buff_size = be64_to_cpu(size_array[i]);
536 rx_pool->active = 1;
537
538 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
539 GFP_KERNEL);
540 if (!rx_pool->free_map) {
541 release_rx_pools(adapter);
542 return -1;
032c5e82 543 }
0ffe2cb7
NF		 544
545 rx_pool->rx_buff = kcalloc(rx_pool->size,
546 sizeof(struct ibmvnic_rx_buff),
547 GFP_KERNEL);
548 if (!rx_pool->rx_buff) {
549 dev_err(dev, "Couldn't alloc rx buffers\n");
550 release_rx_pools(adapter);
551 return -1;
552 }
553
554 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
555 rx_pool->size * rx_pool->buff_size)) {
556 release_rx_pools(adapter);
557 return -1;
558 }
559
560 for (j = 0; j < rx_pool->size; ++j)
561 rx_pool->free_map[j] = j;
562
563 atomic_set(&rx_pool->available, 0);
564 rx_pool->next_alloc = 0;
565 rx_pool->next_free = 0;
032c5e82 566 }
0ffe2cb7
NF		 567
568 return 0;
032c5e82
TF		 569}
570
e26dc25b
TF		 571static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
572 struct ibmvnic_tx_pool *tx_pool)
573{
574 int rc, i;
575
576 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
577 if (rc)
578 return rc;
579
580 memset(tx_pool->tx_buff, 0,
581 tx_pool->num_buffers *
582 sizeof(struct ibmvnic_tx_buff));
583
584 for (i = 0; i < tx_pool->num_buffers; i++)
585 tx_pool->free_map[i] = i;
586
587 tx_pool->consumer_index = 0;
588 tx_pool->producer_index = 0;
589
590 return 0;
591}
592
8c0543ad
NF		 593static int reset_tx_pools(struct ibmvnic_adapter *adapter)
594{
8c0543ad 595 int tx_scrqs;
e26dc25b 596 int i, rc;
8c0543ad
NF		 597
598 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
599 for (i = 0; i < tx_scrqs; i++) {
e26dc25b 600 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
f3be0cbc
TF		 601 if (rc)
602 return rc;
e26dc25b 603 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
fdb06105
TF		 604 if (rc)
605 return rc;
8c0543ad
NF		 606 }
607
608 return 0;
609}
610
4e6759be
DANR		 611static void release_vpd_data(struct ibmvnic_adapter *adapter)
612{
613 if (!adapter->vpd)
614 return;
615
616 kfree(adapter->vpd->buff);
617 kfree(adapter->vpd);
b0992eca
TF		 618
619 adapter->vpd = NULL;
4e6759be
DANR		 620}
621
fb79421c
TF		 622static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
623 struct ibmvnic_tx_pool *tx_pool)
624{
625 kfree(tx_pool->tx_buff);
626 kfree(tx_pool->free_map);
627 free_long_term_buff(adapter, &tx_pool->long_term_buff);
628}
629
c657e32c
NF		 630static void release_tx_pools(struct ibmvnic_adapter *adapter)
631{
896d8695 632 int i;
c657e32c
NF		 633
634 if (!adapter->tx_pool)
635 return;
636
82e3be32 637 for (i = 0; i < adapter->num_active_tx_pools; i++) {
fb79421c
TF		 638 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
639 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
c657e32c
NF		 640 }
641
642 kfree(adapter->tx_pool);
643 adapter->tx_pool = NULL;
fb79421c
TF		 644 kfree(adapter->tso_pool);
645 adapter->tso_pool = NULL;
82e3be32 646 adapter->num_active_tx_pools = 0;
c657e32c
NF		 647}
648
3205306c
TF		 649static int init_one_tx_pool(struct net_device *netdev,
650 struct ibmvnic_tx_pool *tx_pool,
651 int num_entries, int buf_size)
652{
653 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
654 int i;
655
656 tx_pool->tx_buff = kcalloc(num_entries,
657 sizeof(struct ibmvnic_tx_buff),
658 GFP_KERNEL);
659 if (!tx_pool->tx_buff)
660 return -1;
661
662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
663 num_entries * buf_size))
664 return -1;
665
666 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
667 if (!tx_pool->free_map)
668 return -1;
669
670 for (i = 0; i < num_entries; i++)
671 tx_pool->free_map[i] = i;
672
673 tx_pool->consumer_index = 0;
674 tx_pool->producer_index = 0;
675 tx_pool->num_buffers = num_entries;
676 tx_pool->buf_size = buf_size;
677
678 return 0;
679}
680
c657e32c
NF		 681static int init_tx_pools(struct net_device *netdev)
682{
683 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
c657e32c 684 int tx_subcrqs;
3205306c 685 int i, rc;
c657e32c
NF		 686
687 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
688 adapter->tx_pool = kcalloc(tx_subcrqs,
689 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
690 if (!adapter->tx_pool)
691 return -1;
692
3205306c
TF		 693 adapter->tso_pool = kcalloc(tx_subcrqs,
694 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
695 if (!adapter->tso_pool)
696 return -1;
697
82e3be32
NF		 698 adapter->num_active_tx_pools = tx_subcrqs;
699
c657e32c 700 for (i = 0; i < tx_subcrqs; i++) {
3205306c
TF		 701 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
702 adapter->req_tx_entries_per_subcrq,
703 adapter->req_mtu + VLAN_HLEN);
704 if (rc) {
c657e32c 705 release_tx_pools(adapter);
3205306c 706 return rc;
fdb06105
TF		 707 }
708
3205306c
TF		 709 init_one_tx_pool(netdev, &adapter->tso_pool[i],
710 IBMVNIC_TSO_BUFS,
711 IBMVNIC_TSO_BUF_SZ);
712 if (rc) {
c657e32c 713 release_tx_pools(adapter);
3205306c 714 return rc;
c657e32c 715 }
c657e32c
NF		 716 }
717
718 return 0;
719}
720
d944c3d6
JA		 721static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
722{
723 int i;
724
725 if (adapter->napi_enabled)
726 return;
727
728 for (i = 0; i < adapter->req_rx_queues; i++)
729 napi_enable(&adapter->napi[i]);
730
731 adapter->napi_enabled = true;
732}
733
734static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
735{
736 int i;
737
738 if (!adapter->napi_enabled)
739 return;
740
d1cf33d9
NF		 741 for (i = 0; i < adapter->req_rx_queues; i++) {
742 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
d944c3d6 743 napi_disable(&adapter->napi[i]);
d1cf33d9 744 }
d944c3d6
JA		 745
746 adapter->napi_enabled = false;
747}
748
86f669b2
NF		 749static int init_napi(struct ibmvnic_adapter *adapter)
750{
751 int i;
752
753 adapter->napi = kcalloc(adapter->req_rx_queues,
754 sizeof(struct napi_struct), GFP_KERNEL);
755 if (!adapter->napi)
756 return -ENOMEM;
757
758 for (i = 0; i < adapter->req_rx_queues; i++) {
759 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
760 netif_napi_add(adapter->netdev, &adapter->napi[i],
761 ibmvnic_poll, NAPI_POLL_WEIGHT);
762 }
763
82e3be32 764 adapter->num_active_rx_napi = adapter->req_rx_queues;
86f669b2
NF		 765 return 0;
766}
767
768static void release_napi(struct ibmvnic_adapter *adapter)
769{
770 int i;
771
772 if (!adapter->napi)
773 return;
774
82e3be32 775 for (i = 0; i < adapter->num_active_rx_napi; i++) {
86f669b2
NF		 776 if (&adapter->napi[i]) {
777 netdev_dbg(adapter->netdev,
778 "Releasing napi[%d]\n", i);
779 netif_napi_del(&adapter->napi[i]);
780 }
781 }
782
783 kfree(adapter->napi);
784 adapter->napi = NULL;
82e3be32 785 adapter->num_active_rx_napi = 0;
c3f22415 786 adapter->napi_enabled = false;
86f669b2
NF		 787}
788
a57a5d25 789static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 790{
791 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 792 unsigned long timeout = msecs_to_jiffies(30000);
64d92aa2 793 int retry_count = 0;
eb110410 794 bool retry;
4d96f12a 795 int rc;
032c5e82 796
bd0b6723 797 do {
eb110410 798 retry = false;
64d92aa2
NF		 799 if (retry_count > IBMVNIC_MAX_QUEUES) {
800 netdev_warn(netdev, "Login attempts exceeded\n");
801 return -1;
802 }
803
804 adapter->init_done_rc = 0;
805 reinit_completion(&adapter->init_done);
806 rc = send_login(adapter);
807 if (rc) {
808 netdev_warn(netdev, "Unable to login\n");
809 return rc;
810 }
811
812 if (!wait_for_completion_timeout(&adapter->init_done,
813 timeout)) {
814 netdev_warn(netdev, "Login timed out\n");
815 return -1;
816 }
817
818 if (adapter->init_done_rc == PARTIALSUCCESS) {
819 retry_count++;
d7c0ef36 820 release_sub_crqs(adapter, 1);
bd0b6723 821
eb110410
TF		 822 retry = true;
823 netdev_dbg(netdev,
824 "Received partial success, retrying...\n");
64d92aa2 825 adapter->init_done_rc = 0;
bd0b6723
JA		 826 reinit_completion(&adapter->init_done);
827 send_cap_queries(adapter);
828 if (!wait_for_completion_timeout(&adapter->init_done,
829 timeout)) {
64d92aa2
NF		 830 netdev_warn(netdev,
831 "Capabilities query timed out\n");
bd0b6723
JA		 832 return -1;
833 }
64d92aa2 834
4d96f12a
TF		 835 rc = init_sub_crqs(adapter);
836 if (rc) {
64d92aa2
NF		 837 netdev_warn(netdev,
838 "SCRQ initialization failed\n");
4d96f12a
TF		 839 return -1;
840 }
64d92aa2 841
4d96f12a
TF		 842 rc = init_sub_crq_irqs(adapter);
843 if (rc) {
64d92aa2
NF		 844 netdev_warn(netdev,
845 "SCRQ irq initialization failed\n");
4d96f12a
TF		 846 return -1;
847 }
64d92aa2
NF		 848 } else if (adapter->init_done_rc) {
849 netdev_warn(netdev, "Adapter login failed\n");
bd0b6723
JA		 850 return -1;
851 }
eb110410 852 } while (retry);
bd0b6723 853
3d166130
TF		 854 /* handle pending MAC address changes after successful login */
855 if (adapter->mac_change_pending) {
856 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
857 adapter->mac_change_pending = false;
858 }
859
a57a5d25
JA		 860 return 0;
861}
862
34f0f4e3
TF		 863static void release_login_buffer(struct ibmvnic_adapter *adapter)
864{
865 kfree(adapter->login_buf);
866 adapter->login_buf = NULL;
867}
868
869static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
870{
871 kfree(adapter->login_rsp_buf);
872 adapter->login_rsp_buf = NULL;
873}
874
1b8955ee
NF		 875static void release_resources(struct ibmvnic_adapter *adapter)
876{
4e6759be
DANR		 877 release_vpd_data(adapter);
878
1b8955ee
NF		 879 release_tx_pools(adapter);
880 release_rx_pools(adapter);
881
86f669b2 882 release_napi(adapter);
34f0f4e3 883 release_login_rsp_buffer(adapter);
1b8955ee
NF		 884}
885
53da09e9
NF		 886static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
887{
888 struct net_device *netdev = adapter->netdev;
889 unsigned long timeout = msecs_to_jiffies(30000);
890 union ibmvnic_crq crq;
891 bool resend;
892 int rc;
893
d1cf33d9
NF		 894 netdev_dbg(netdev, "setting link state %d\n", link_state);
895
53da09e9
NF		 896 memset(&crq, 0, sizeof(crq));
897 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
898 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
899 crq.logical_link_state.link_state = link_state;
900
901 do {
902 resend = false;
903
904 reinit_completion(&adapter->init_done);
905 rc = ibmvnic_send_crq(adapter, &crq);
906 if (rc) {
907 netdev_err(netdev, "Failed to set link state\n");
908 return rc;
909 }
910
911 if (!wait_for_completion_timeout(&adapter->init_done,
912 timeout)) {
913 netdev_err(netdev, "timeout setting link state\n");
914 return -1;
915 }
916
917 if (adapter->init_done_rc == 1) {
918 /* Partuial success, delay and re-send */
919 mdelay(1000);
920 resend = true;
ab5ec33b
TF		 921 } else if (adapter->init_done_rc) {
922 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
923 adapter->init_done_rc);
924 return adapter->init_done_rc;
53da09e9
NF		 925 }
926 } while (resend);
927
928 return 0;
929}
930
7f3c6e6b
TF		 931static int set_real_num_queues(struct net_device *netdev)
932{
933 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
934 int rc;
935
d1cf33d9
NF		 936 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
937 adapter->req_tx_queues, adapter->req_rx_queues);
938
7f3c6e6b
TF		 939 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
940 if (rc) {
941 netdev_err(netdev, "failed to set the number of tx queues\n");
942 return rc;
943 }
944
945 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
946 if (rc)
947 netdev_err(netdev, "failed to set the number of rx queues\n");
948
949 return rc;
950}
951
4e6759be
DANR		 952static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
953{
954 struct device *dev = &adapter->vdev->dev;
955 union ibmvnic_crq crq;
4e6759be 956 int len = 0;
9c4eaabd 957 int rc;
4e6759be
DANR		 958
959 if (adapter->vpd->buff)
960 len = adapter->vpd->len;
961
69d08dcb 962 init_completion(&adapter->fw_done);
4e6759be
DANR		 963 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
964 crq.get_vpd_size.cmd = GET_VPD_SIZE;
9c4eaabd
TF		 965 rc = ibmvnic_send_crq(adapter, &crq);
966 if (rc)
967 return rc;
4e6759be
DANR		 968 wait_for_completion(&adapter->fw_done);
969
970 if (!adapter->vpd->len)
971 return -ENODATA;
972
973 if (!adapter->vpd->buff)
974 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
975 else if (adapter->vpd->len != len)
976 adapter->vpd->buff =
977 krealloc(adapter->vpd->buff,
978 adapter->vpd->len, GFP_KERNEL);
979
980 if (!adapter->vpd->buff) {
981 dev_err(dev, "Could allocate VPD buffer\n");
982 return -ENOMEM;
983 }
984
985 adapter->vpd->dma_addr =
986 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
987 DMA_FROM_DEVICE);
f743106e 988 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
4e6759be
DANR		 989 dev_err(dev, "Could not map VPD buffer\n");
990 kfree(adapter->vpd->buff);
b0992eca 991 adapter->vpd->buff = NULL;
4e6759be
DANR		 992 return -ENOMEM;
993 }
994
995 reinit_completion(&adapter->fw_done);
996 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
997 crq.get_vpd.cmd = GET_VPD;
998 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
999 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
9c4eaabd
TF		 1000 rc = ibmvnic_send_crq(adapter, &crq);
1001 if (rc) {
1002 kfree(adapter->vpd->buff);
1003 adapter->vpd->buff = NULL;
1004 return rc;
1005 }
4e6759be
DANR		 1006 wait_for_completion(&adapter->fw_done);
1007
1008 return 0;
1009}
1010
bfc32f29 1011static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 1012{
bfc32f29 1013 struct net_device *netdev = adapter->netdev;
86f669b2 1014 int rc;
a57a5d25 1015
7f3c6e6b
TF		 1016 rc = set_real_num_queues(netdev);
1017 if (rc)
1018 return rc;
bd0b6723 1019
4e6759be
DANR		 1020 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1021 if (!adapter->vpd)
1022 return -ENOMEM;
1023
69d08dcb
JA		 1024 /* Vital Product Data (VPD) */
1025 rc = ibmvnic_get_vpd(adapter);
1026 if (rc) {
1027 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1028 return rc;
1029 }
1030
032c5e82 1031 adapter->map_id = 1;
bfc32f29 1032
86f669b2
NF		 1033 rc = init_napi(adapter);
1034 if (rc)
1035 return rc;
032c5e82 1036
032c5e82 1037 send_map_query(adapter);
0ffe2cb7
NF		 1038
1039 rc = init_rx_pools(netdev);
1040 if (rc)
bfc32f29 1041 return rc;
032c5e82 1042
c657e32c 1043 rc = init_tx_pools(netdev);
bfc32f29
NF		 1044 return rc;
1045}
1046
ed651a10 1047static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 1048{
1049 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 1050 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 1051 int i, rc;
1052
90c8014c 1053 adapter->state = VNIC_OPENING;
032c5e82 1054 replenish_pools(adapter);
d944c3d6 1055 ibmvnic_napi_enable(adapter);
bfc32f29 1056
032c5e82
TF		 1057 /* We're ready to receive frames, enable the sub-crq interrupts and
1058 * set the logical link state to up
1059 */
ed651a10 1060 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 1061 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
ed651a10
NF		 1062 if (prev_state == VNIC_CLOSED)
1063 enable_irq(adapter->rx_scrq[i]->irq);
f23e0643 1064 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
ed651a10 1065 }
032c5e82 1066
ed651a10 1067 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 1068 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
ed651a10
NF		 1069 if (prev_state == VNIC_CLOSED)
1070 enable_irq(adapter->tx_scrq[i]->irq);
f23e0643 1071 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
ed651a10 1072 }
032c5e82 1073
53da09e9 1074 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 1075 if (rc) {
1076 for (i = 0; i < adapter->req_rx_queues; i++)
1077 napi_disable(&adapter->napi[i]);
1078 release_resources(adapter);
ed651a10 1079 return rc;
bfc32f29 1080 }
032c5e82 1081
ed651a10
NF		 1082 netif_tx_start_all_queues(netdev);
1083
1084 if (prev_state == VNIC_CLOSED) {
1085 for (i = 0; i < adapter->req_rx_queues; i++)
1086 napi_schedule(&adapter->napi[i]);
1087 }
1088
1089 adapter->state = VNIC_OPEN;
1090 return rc;
1091}
1092
1093static int ibmvnic_open(struct net_device *netdev)
1094{
1095 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
69d08dcb 1096 int rc;
ed651a10 1097
5a18e1e0
TF		 1098 /* If device failover is pending, just set device state and return.
1099 * Device operation will be handled by reset routine.
1100 */
1101 if (adapter->failover_pending) {
1102 adapter->state = VNIC_OPEN;
1103 return 0;
1104 }
1105
ed651a10
NF		 1106 if (adapter->state != VNIC_CLOSED) {
1107 rc = ibmvnic_login(netdev);
a5681e20 1108 if (rc)
ed651a10 1109 return rc;
ed651a10
NF		 1110
1111 rc = init_resources(adapter);
1112 if (rc) {
1113 netdev_err(netdev, "failed to initialize resources\n");
1114 release_resources(adapter);
ed651a10
NF		 1115 return rc;
1116 }
1117 }
1118
1119 rc = __ibmvnic_open(netdev);
e876a8a7 1120 netif_carrier_on(netdev);
4e6759be 1121
bfc32f29 1122 return rc;
032c5e82
TF		 1123}
1124
d0869c00
TF		 1125static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1126{
1127 struct ibmvnic_rx_pool *rx_pool;
637f81d1 1128 struct ibmvnic_rx_buff *rx_buff;
d0869c00
TF		 1129 u64 rx_entries;
1130 int rx_scrqs;
1131 int i, j;
1132
1133 if (!adapter->rx_pool)
1134 return;
1135
660e309d 1136 rx_scrqs = adapter->num_active_rx_pools;
d0869c00
TF		 1137 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1138
1139 /* Free any remaining skbs in the rx buffer pools */
1140 for (i = 0; i < rx_scrqs; i++) {
1141 rx_pool = &adapter->rx_pool[i];
637f81d1 1142 if (!rx_pool || !rx_pool->rx_buff)
d0869c00
TF		 1143 continue;
1144
1145 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1146 for (j = 0; j < rx_entries; j++) {
637f81d1
TF		 1147 rx_buff = &rx_pool->rx_buff[j];
1148 if (rx_buff && rx_buff->skb) {
1149 dev_kfree_skb_any(rx_buff->skb);
1150 rx_buff->skb = NULL;
d0869c00
TF		 1151 }
1152 }
1153 }
1154}
1155
e9e1e978
TF		 1156static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1157 struct ibmvnic_tx_pool *tx_pool)
b41b83e9 1158{
637f81d1 1159 struct ibmvnic_tx_buff *tx_buff;
b41b83e9 1160 u64 tx_entries;
e9e1e978
TF		 1161 int i;
1162
050e85c9 1163 if (!tx_pool || !tx_pool->tx_buff)
e9e1e978
TF		 1164 return;
1165
1166 tx_entries = tx_pool->num_buffers;
1167
1168 for (i = 0; i < tx_entries; i++) {
1169 tx_buff = &tx_pool->tx_buff[i];
1170 if (tx_buff && tx_buff->skb) {
1171 dev_kfree_skb_any(tx_buff->skb);
1172 tx_buff->skb = NULL;
1173 }
1174 }
1175}
1176
1177static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1178{
b41b83e9 1179 int tx_scrqs;
e9e1e978 1180 int i;
b41b83e9 1181
e9e1e978 1182 if (!adapter->tx_pool || !adapter->tso_pool)
b41b83e9
NF		 1183 return;
1184
660e309d 1185 tx_scrqs = adapter->num_active_tx_pools;
b41b83e9
NF		 1186
1187 /* Free any remaining skbs in the tx buffer pools */
1188 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9 1189 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
e9e1e978
TF		 1190 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1191 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
b41b83e9
NF		 1192 }
1193}
1194
6095e590 1195static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
ea5509f5 1196{
6095e590 1197 struct net_device *netdev = adapter->netdev;
ea5509f5
JA		 1198 int i;
1199
46293b94
NF		 1200 if (adapter->tx_scrq) {
1201 for (i = 0; i < adapter->req_tx_queues; i++)
d1cf33d9 1202 if (adapter->tx_scrq[i]->irq) {
f873866a 1203 netdev_dbg(netdev,
d1cf33d9 1204 "Disabling tx_scrq[%d] irq\n", i);
f23e0643 1205 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
46293b94 1206 disable_irq(adapter->tx_scrq[i]->irq);
d1cf33d9 1207 }
46293b94
NF		 1208 }
1209
46293b94
NF		 1210 if (adapter->rx_scrq) {
1211 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 1212 if (adapter->rx_scrq[i]->irq) {
f873866a 1213 netdev_dbg(netdev,
d1cf33d9 1214 "Disabling rx_scrq[%d] irq\n", i);
f23e0643 1215 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
46293b94 1216 disable_irq(adapter->rx_scrq[i]->irq);
d1cf33d9 1217 }
46293b94
NF		 1218 }
1219 }
6095e590
JA		 1220}
1221
1222static void ibmvnic_cleanup(struct net_device *netdev)
1223{
1224 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1225
1226 /* ensure that transmissions are stopped if called by do_reset */
1227 if (adapter->resetting)
1228 netif_tx_disable(netdev);
1229 else
1230 netif_tx_stop_all_queues(netdev);
1231
1232 ibmvnic_napi_disable(adapter);
1233 ibmvnic_disable_irqs(adapter);
1234
d0869c00 1235 clean_rx_pools(adapter);
10f76215 1236 clean_tx_pools(adapter);
01d9bd79
TF		 1237}
1238
1239static int __ibmvnic_close(struct net_device *netdev)
1240{
1241 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1242 int rc = 0;
1243
1244 adapter->state = VNIC_CLOSING;
1245 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1246 if (rc)
1247 return rc;
90c8014c 1248 adapter->state = VNIC_CLOSED;
01d9bd79 1249 return 0;
032c5e82
TF		 1250}
1251
ed651a10
NF		 1252static int ibmvnic_close(struct net_device *netdev)
1253{
1254 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1255 int rc;
1256
5a18e1e0
TF		 1257 /* If device failover is pending, just set device state and return.
1258 * Device operation will be handled by reset routine.
1259 */
1260 if (adapter->failover_pending) {
1261 adapter->state = VNIC_CLOSED;
1262 return 0;
1263 }
1264
ed651a10 1265 rc = __ibmvnic_close(netdev);
30f79625 1266 ibmvnic_cleanup(netdev);
ed651a10
NF		 1267
1268 return rc;
1269}
1270
ad7775dc
TF		 1271/**
1272 * build_hdr_data - creates L2/L3/L4 header data buffer
1273 * @hdr_field - bitfield determining needed headers
1274 * @skb - socket buffer
1275 * @hdr_len - array of header lengths
1276 * @tot_len - total length of data
1277 *
1278 * Reads hdr_field to determine which headers are needed by firmware.
1279 * Builds a buffer containing these headers. Saves individual header
1280 * lengths and total buffer length to be used to build descriptors.
1281 */
1282static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1283 int *hdr_len, u8 *hdr_data)
1284{
1285 int len = 0;
1286 u8 *hdr;
1287
da75e3b6
TF		 1288 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1289 hdr_len[0] = sizeof(struct vlan_ethhdr);
1290 else
1291 hdr_len[0] = sizeof(struct ethhdr);
ad7775dc
TF		 1292
1293 if (skb->protocol == htons(ETH_P_IP)) {
1294 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1295 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1296 hdr_len[2] = tcp_hdrlen(skb);
1297 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1298 hdr_len[2] = sizeof(struct udphdr);
1299 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1300 hdr_len[1] = sizeof(struct ipv6hdr);
1301 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1302 hdr_len[2] = tcp_hdrlen(skb);
1303 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1304 hdr_len[2] = sizeof(struct udphdr);
4eb50ceb
TF		 1305 } else if (skb->protocol == htons(ETH_P_ARP)) {
1306 hdr_len[1] = arp_hdr_len(skb->dev);
1307 hdr_len[2] = 0;
ad7775dc
TF		 1308 }
1309
1310 memset(hdr_data, 0, 120);
1311 if ((hdr_field >> 6) & 1) {
1312 hdr = skb_mac_header(skb);
1313 memcpy(hdr_data, hdr, hdr_len[0]);
1314 len += hdr_len[0];
1315 }
1316
1317 if ((hdr_field >> 5) & 1) {
1318 hdr = skb_network_header(skb);
1319 memcpy(hdr_data + len, hdr, hdr_len[1]);
1320 len += hdr_len[1];
1321 }
1322
1323 if ((hdr_field >> 4) & 1) {
1324 hdr = skb_transport_header(skb);
1325 memcpy(hdr_data + len, hdr, hdr_len[2]);
1326 len += hdr_len[2];
1327 }
1328 return len;
1329}
1330
1331/**
1332 * create_hdr_descs - create header and header extension descriptors
1333 * @hdr_field - bitfield determining needed headers
1334 * @data - buffer containing header data
1335 * @len - length of data buffer
1336 * @hdr_len - array of individual header lengths
1337 * @scrq_arr - descriptor array
1338 *
1339 * Creates header and, if needed, header extension descriptors and
1340 * places them in a descriptor array, scrq_arr
1341 */
1342
2de09681
TF		 1343static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1344 union sub_crq *scrq_arr)
ad7775dc
TF		 1345{
1346 union sub_crq hdr_desc;
1347 int tmp_len = len;
2de09681 1348 int num_descs = 0;
ad7775dc
TF		 1349 u8 *data, *cur;
1350 int tmp;
1351
1352 while (tmp_len > 0) {
1353 cur = hdr_data + len - tmp_len;
1354
1355 memset(&hdr_desc, 0, sizeof(hdr_desc));
1356 if (cur != hdr_data) {
1357 data = hdr_desc.hdr_ext.data;
1358 tmp = tmp_len > 29 ? 29 : tmp_len;
1359 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1360 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1361 hdr_desc.hdr_ext.len = tmp;
1362 } else {
1363 data = hdr_desc.hdr.data;
1364 tmp = tmp_len > 24 ? 24 : tmp_len;
1365 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1366 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1367 hdr_desc.hdr.len = tmp;
1368 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1369 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1370 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1371 hdr_desc.hdr.flag = hdr_field << 1;
1372 }
1373 memcpy(data, cur, tmp);
1374 tmp_len -= tmp;
1375 *scrq_arr = hdr_desc;
1376 scrq_arr++;
2de09681 1377 num_descs++;
ad7775dc 1378 }
2de09681
TF		 1379
1380 return num_descs;
ad7775dc
TF		 1381}
1382
1383/**
1384 * build_hdr_descs_arr - build a header descriptor array
1385 * @skb - socket buffer
1386 * @num_entries - number of descriptors to be sent
1387 * @subcrq - first TX descriptor
1388 * @hdr_field - bit field determining which headers will be sent
1389 *
1390 * This function will build a TX descriptor array with applicable
1391 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1392 */
1393
1394static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1395 int *num_entries, u8 hdr_field)
1396{
1397 int hdr_len[3] = {0, 0, 0};
2de09681 1398 int tot_len;
ad7775dc
TF		 1399 u8 *hdr_data = txbuff->hdr_data;
1400
1401 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1402 txbuff->hdr_data);
2de09681 1403 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
ad7775dc
TF		 1404 txbuff->indir_arr + 1);
1405}
1406
1f247a6f
TF		 1407static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1408 struct net_device *netdev)
1409{
1410 /* For some backing devices, mishandling of small packets
1411 * can result in a loss of connection or TX stall. Device
1412 * architects recommend that no packet should be smaller
1413 * than the minimum MTU value provided to the driver, so
1414 * pad any packets to that length
1415 */
1416 if (skb->len < netdev->min_mtu)
1417 return skb_put_padto(skb, netdev->min_mtu);
7083a45a
TF		 1418
1419 return 0;
1f247a6f
TF		 1420}
1421
94b2bb28 1422static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
032c5e82
TF		 1423{
1424 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1425 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1426 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1427 struct device *dev = &adapter->vdev->dev;
1428 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1429 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1430 struct ibmvnic_tx_pool *tx_pool;
1431 unsigned int tx_send_failed = 0;
1432 unsigned int tx_map_failed = 0;
1433 unsigned int tx_dropped = 0;
1434 unsigned int tx_packets = 0;
1435 unsigned int tx_bytes = 0;
1436 dma_addr_t data_dma_addr;
1437 struct netdev_queue *txq;
032c5e82
TF		 1438 unsigned long lpar_rc;
1439 union sub_crq tx_crq;
1440 unsigned int offset;
ad7775dc 1441 int num_entries = 1;
032c5e82
TF		 1442 unsigned char *dst;
1443 u64 *handle_array;
1444 int index = 0;
a0dca10f 1445 u8 proto = 0;
94b2bb28 1446 netdev_tx_t ret = NETDEV_TX_OK;
032c5e82 1447
ed651a10 1448 if (adapter->resetting) {
7f5b0308
TF		 1449 if (!netif_subqueue_stopped(netdev, skb))
1450 netif_stop_subqueue(netdev, queue_num);
1451 dev_kfree_skb_any(skb);
1452
032c5e82
TF		 1453 tx_send_failed++;
1454 tx_dropped++;
7f5b0308 1455 ret = NETDEV_TX_OK;
032c5e82
TF		 1456 goto out;
1457 }
1458
7083a45a 1459 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1f247a6f
TF		 1460 tx_dropped++;
1461 tx_send_failed++;
1462 ret = NETDEV_TX_OK;
1463 goto out;
1464 }
06b3e357
TF		 1465 if (skb_is_gso(skb))
1466 tx_pool = &adapter->tso_pool[queue_num];
1467 else
1468 tx_pool = &adapter->tx_pool[queue_num];
1f247a6f 1469
161b8a81
NF		 1470 tx_scrq = adapter->tx_scrq[queue_num];
1471 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1472 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1473 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1474
032c5e82 1475 index = tx_pool->free_map[tx_pool->consumer_index];
fdb06105 1476
86b61a5f
TF		 1477 if (index == IBMVNIC_INVALID_MAP) {
1478 dev_kfree_skb_any(skb);
1479 tx_send_failed++;
1480 tx_dropped++;
1481 ret = NETDEV_TX_OK;
1482 goto out;
1483 }
1484
1485 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1486
06b3e357
TF		 1487 offset = index * tx_pool->buf_size;
1488 dst = tx_pool->long_term_buff.buff + offset;
1489 memset(dst, 0, tx_pool->buf_size);
1490 data_dma_addr = tx_pool->long_term_buff.addr + offset;
032c5e82 1491
15482056
TF		 1492 if (skb_shinfo(skb)->nr_frags) {
1493 int cur, i;
1494
1495 /* Copy the head */
1496 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1497 cur = skb_headlen(skb);
1498
1499 /* Copy the frags */
1500 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1501 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1502
1503 memcpy(dst + cur,
1504 page_address(skb_frag_page(frag)) +
1505 frag->page_offset, skb_frag_size(frag));
1506 cur += skb_frag_size(frag);
1507 }
1508 } else {
1509 skb_copy_from_linear_data(skb, dst, skb->len);
1510 }
1511
032c5e82 1512 tx_pool->consumer_index =
06b3e357 1513 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
032c5e82
TF		 1514
1515 tx_buff = &tx_pool->tx_buff[index];
1516 tx_buff->skb = skb;
1517 tx_buff->data_dma[0] = data_dma_addr;
1518 tx_buff->data_len[0] = skb->len;
1519 tx_buff->index = index;
1520 tx_buff->pool_index = queue_num;
1521 tx_buff->last_frag = true;
032c5e82
TF		 1522
1523 memset(&tx_crq, 0, sizeof(tx_crq));
1524 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1525 tx_crq.v1.type = IBMVNIC_TX_DESC;
1526 tx_crq.v1.n_crq_elem = 1;
1527 tx_crq.v1.n_sge = 1;
1528 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
06b3e357 1529
fdb06105 1530 if (skb_is_gso(skb))
06b3e357
TF		 1531 tx_crq.v1.correlator =
1532 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
fdb06105 1533 else
06b3e357
TF		 1534 tx_crq.v1.correlator = cpu_to_be32(index);
1535 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
032c5e82
TF		 1536 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1537 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1538
e84b4794 1539 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
032c5e82
TF		 1540 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1541 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1542 }
1543
1544 if (skb->protocol == htons(ETH_P_IP)) {
a0dca10f
TF		 1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1546 proto = ip_hdr(skb)->protocol;
1547 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1548 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1549 proto = ipv6_hdr(skb)->nexthdr;
032c5e82
TF		 1550 }
1551
a0dca10f
TF		 1552 if (proto == IPPROTO_TCP)
1553 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1554 else if (proto == IPPROTO_UDP)
1555 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1556
ad7775dc 1557 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1558 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1559 hdrs += 2;
1560 }
fdb06105
TF		 1561 if (skb_is_gso(skb)) {
1562 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1563 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1564 hdrs += 2;
1565 }
ad7775dc 1566 /* determine if l2/3/4 headers are sent to firmware */
2fa56a49 1567 if ((*hdrs >> 7) & 1) {
ad7775dc
TF		 1568 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1569 tx_crq.v1.n_crq_elem = num_entries;
ecba616e 1570 tx_buff->num_entries = num_entries;
ad7775dc
TF		 1571 tx_buff->indir_arr[0] = tx_crq;
1572 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1573 sizeof(tx_buff->indir_arr),
1574 DMA_TO_DEVICE);
1575 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1576 dev_kfree_skb_any(skb);
1577 tx_buff->skb = NULL;
ad7775dc
TF		 1578 if (!firmware_has_feature(FW_FEATURE_CMO))
1579 dev_err(dev, "tx: unable to map descriptor array\n");
1580 tx_map_failed++;
1581 tx_dropped++;
7f5b0308 1582 ret = NETDEV_TX_OK;
86b61a5f 1583 goto tx_err_out;
ad7775dc 1584 }
498cd8e4 1585 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1586 (u64)tx_buff->indir_dma,
1587 (u64)num_entries);
1588 } else {
ecba616e 1589 tx_buff->num_entries = num_entries;
498cd8e4
JA		 1590 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1591 &tx_crq);
ad7775dc 1592 }
032c5e82 1593 if (lpar_rc != H_SUCCESS) {
2d14d379
TF		 1594 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1595 dev_err_ratelimited(dev, "tx: send failed\n");
7f5b0308
TF		 1596 dev_kfree_skb_any(skb);
1597 tx_buff->skb = NULL;
1598
5a18e1e0
TF		 1599 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1600 /* Disable TX and report carrier off if queue is closed
1601 * or pending failover.
b8c80b84
TF		 1602 * Firmware guarantees that a signal will be sent to the
1603 * driver, triggering a reset or some other action.
1604 */
1605 netif_tx_stop_all_queues(netdev);
1606 netif_carrier_off(netdev);
1607 }
7f5b0308 1608
032c5e82
TF		 1609 tx_send_failed++;
1610 tx_dropped++;
7f5b0308 1611 ret = NETDEV_TX_OK;
86b61a5f 1612 goto tx_err_out;
032c5e82 1613 }
142c0ac4 1614
ffc385b9 1615 if (atomic_add_return(num_entries, &tx_scrq->used)
58c8c0c0 1616 >= adapter->req_tx_entries_per_subcrq) {
0aecb13c 1617 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
142c0ac4
TF		 1618 netif_stop_subqueue(netdev, queue_num);
1619 }
1620
032c5e82
TF		 1621 tx_packets++;
1622 tx_bytes += skb->len;
1623 txq->trans_start = jiffies;
1624 ret = NETDEV_TX_OK;
86b61a5f 1625 goto out;
032c5e82 1626
86b61a5f
TF		 1627tx_err_out:
1628 /* roll back consumer index and map array*/
1629 if (tx_pool->consumer_index == 0)
1630 tx_pool->consumer_index =
1631 tx_pool->num_buffers - 1;
1632 else
1633 tx_pool->consumer_index--;
1634 tx_pool->free_map[tx_pool->consumer_index] = index;
032c5e82
TF		 1635out:
1636 netdev->stats.tx_dropped += tx_dropped;
1637 netdev->stats.tx_bytes += tx_bytes;
1638 netdev->stats.tx_packets += tx_packets;
1639 adapter->tx_send_failed += tx_send_failed;
1640 adapter->tx_map_failed += tx_map_failed;
3d52b594
JA		 1641 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1642 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1643 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
032c5e82
TF		 1644
1645 return ret;
1646}
1647
1648static void ibmvnic_set_multi(struct net_device *netdev)
1649{
1650 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1651 struct netdev_hw_addr *ha;
1652 union ibmvnic_crq crq;
1653
1654 memset(&crq, 0, sizeof(crq));
1655 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1656 crq.request_capability.cmd = REQUEST_CAPABILITY;
1657
1658 if (netdev->flags & IFF_PROMISC) {
1659 if (!adapter->promisc_supported)
1660 return;
1661 } else {
1662 if (netdev->flags & IFF_ALLMULTI) {
1663 /* Accept all multicast */
1664 memset(&crq, 0, sizeof(crq));
1665 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1666 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1667 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1668 ibmvnic_send_crq(adapter, &crq);
1669 } else if (netdev_mc_empty(netdev)) {
1670 /* Reject all multicast */
1671 memset(&crq, 0, sizeof(crq));
1672 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1673 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1674 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1675 ibmvnic_send_crq(adapter, &crq);
1676 } else {
1677 /* Accept one or more multicast(s) */
1678 netdev_for_each_mc_addr(ha, netdev) {
1679 memset(&crq, 0, sizeof(crq));
1680 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1681 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1682 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1683 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1684 ha->addr);
1685 ibmvnic_send_crq(adapter, &crq);
1686 }
1687 }
1688 }
1689}
1690
c26eba03 1691static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
032c5e82
TF		 1692{
1693 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1694 struct sockaddr *addr = p;
1695 union ibmvnic_crq crq;
9c4eaabd 1696 int rc;
032c5e82
TF		 1697
1698 if (!is_valid_ether_addr(addr->sa_data))
1699 return -EADDRNOTAVAIL;
1700
1701 memset(&crq, 0, sizeof(crq));
1702 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1703 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1704 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
f813614f
TF		 1705
1706 init_completion(&adapter->fw_done);
9c4eaabd
TF		 1707 rc = ibmvnic_send_crq(adapter, &crq);
1708 if (rc)
1709 return rc;
f813614f 1710 wait_for_completion(&adapter->fw_done);
032c5e82 1711 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
f813614f 1712 return adapter->fw_done_rc ? -EIO : 0;
032c5e82
TF		 1713}
1714
c26eba03
JA		 1715static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1716{
1717 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1718 struct sockaddr *addr = p;
f813614f 1719 int rc;
c26eba03 1720
3d166130 1721 if (adapter->state == VNIC_PROBED) {
c26eba03
JA		 1722 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1723 adapter->mac_change_pending = true;
1724 return 0;
1725 }
1726
f813614f 1727 rc = __ibmvnic_set_mac(netdev, addr);
c26eba03 1728
f813614f 1729 return rc;
c26eba03
JA		 1730}
1731
ed651a10
NF		 1732/**
1733 * do_reset returns zero if we are able to keep processing reset events, or
1734 * non-zero if we hit a fatal error and must halt.
1735 */
1736static int do_reset(struct ibmvnic_adapter *adapter,
1737 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1738{
896d8695 1739 u64 old_num_rx_queues, old_num_tx_queues;
5bf032ef 1740 u64 old_num_rx_slots, old_num_tx_slots;
ed651a10
NF		 1741 struct net_device *netdev = adapter->netdev;
1742 int i, rc;
1743
d1cf33d9
NF		 1744 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1745 rwi->reset_reason);
1746
ed651a10
NF		 1747 netif_carrier_off(netdev);
1748 adapter->reset_reason = rwi->reset_reason;
1749
896d8695
JA		 1750 old_num_rx_queues = adapter->req_rx_queues;
1751 old_num_tx_queues = adapter->req_tx_queues;
5bf032ef
TF		 1752 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1753 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
896d8695 1754
30f79625
NF		 1755 ibmvnic_cleanup(netdev);
1756
1757 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1758 adapter->reset_reason != VNIC_RESET_FAILOVER) {
18b8d6bb
TF		 1759 rc = __ibmvnic_close(netdev);
1760 if (rc)
1761 return rc;
ed651a10
NF		 1762 }
1763
c26eba03
JA		 1764 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1765 adapter->wait_for_reset) {
1766 release_resources(adapter);
d7c0ef36 1767 release_sub_crqs(adapter, 1);
c26eba03
JA		 1768 release_crq_queue(adapter);
1769 }
1770
8cb31cfc
JA		 1771 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1772 /* remove the closed state so when we call open it appears
1773 * we are coming from the probed state.
1774 */
1775 adapter->state = VNIC_PROBED;
032c5e82 1776
30f79625
NF		 1777 if (adapter->wait_for_reset) {
1778 rc = init_crq_queue(adapter);
1779 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1780 rc = ibmvnic_reenable_crq_queue(adapter);
1781 release_sub_crqs(adapter, 1);
1782 } else {
1783 rc = ibmvnic_reset_crq(adapter);
1784 if (!rc)
1785 rc = vio_enable_interrupts(adapter->vdev);
1786 }
1787
1788 if (rc) {
1789 netdev_err(adapter->netdev,
1790 "Couldn't initialize crq. rc=%d\n", rc);
1791 return rc;
1792 }
1793
8a348450 1794 rc = ibmvnic_reset_init(adapter);
8cb31cfc 1795 if (rc)
2a1bf511 1796 return IBMVNIC_INIT_FAILED;
ed651a10 1797
8cb31cfc
JA		 1798 /* If the adapter was in PROBE state prior to the reset,
1799 * exit here.
1800 */
1801 if (reset_state == VNIC_PROBED)
1802 return 0;
ed651a10 1803
8cb31cfc
JA		 1804 rc = ibmvnic_login(netdev);
1805 if (rc) {
3578a7ec
JA		 1806 adapter->state = reset_state;
1807 return rc;
8cb31cfc 1808 }
ed651a10 1809
c26eba03
JA		 1810 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1811 adapter->wait_for_reset) {
1812 rc = init_resources(adapter);
1813 if (rc)
1814 return rc;
896d8695 1815 } else if (adapter->req_rx_queues != old_num_rx_queues ||
5bf032ef
TF		 1816 adapter->req_tx_queues != old_num_tx_queues ||
1817 adapter->req_rx_add_entries_per_subcrq !=
1818 old_num_rx_slots ||
1819 adapter->req_tx_entries_per_subcrq !=
1820 old_num_tx_slots) {
896d8695
JA		 1821 release_rx_pools(adapter);
1822 release_tx_pools(adapter);
86f669b2 1823 release_napi(adapter);
a5681e20
JK		 1824 release_vpd_data(adapter);
1825
1826 rc = init_resources(adapter);
f611a5b4
TF		 1827 if (rc)
1828 return rc;
a5681e20 1829
c26eba03
JA		 1830 } else {
1831 rc = reset_tx_pools(adapter);
1832 if (rc)
1833 return rc;
8c0543ad 1834
c26eba03
JA		 1835 rc = reset_rx_pools(adapter);
1836 if (rc)
1837 return rc;
c26eba03 1838 }
134bbe7f 1839 ibmvnic_disable_irqs(adapter);
8cb31cfc 1840 }
e676d81c
JA		 1841 adapter->state = VNIC_CLOSED;
1842
1843 if (reset_state == VNIC_CLOSED)
1844 return 0;
1845
ed651a10
NF		 1846 rc = __ibmvnic_open(netdev);
1847 if (rc) {
1848 if (list_empty(&adapter->rwi_list))
1849 adapter->state = VNIC_CLOSED;
1850 else
1851 adapter->state = reset_state;
1852
1853 return 0;
1854 }
1855
ed651a10
NF		 1856 /* kick napi */
1857 for (i = 0; i < adapter->req_rx_queues; i++)
1858 napi_schedule(&adapter->napi[i]);
1859
ebc701b7
NF		 1860 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1861 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
61d3e1d9
NF		 1862 netdev_notify_peers(netdev);
1863
cc85c02e
TF		 1864 netif_carrier_on(netdev);
1865
ed651a10
NF		 1866 return 0;
1867}
1868
2770a798
TF		 1869static int do_hard_reset(struct ibmvnic_adapter *adapter,
1870 struct ibmvnic_rwi *rwi, u32 reset_state)
1871{
1872 struct net_device *netdev = adapter->netdev;
1873 int rc;
1874
1875 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1876 rwi->reset_reason);
1877
1878 netif_carrier_off(netdev);
1879 adapter->reset_reason = rwi->reset_reason;
1880
1881 ibmvnic_cleanup(netdev);
1882 release_resources(adapter);
1883 release_sub_crqs(adapter, 0);
1884 release_crq_queue(adapter);
1885
1886 /* remove the closed state so when we call open it appears
1887 * we are coming from the probed state.
1888 */
1889 adapter->state = VNIC_PROBED;
1890
1891 rc = init_crq_queue(adapter);
1892 if (rc) {
1893 netdev_err(adapter->netdev,
1894 "Couldn't initialize crq. rc=%d\n", rc);
1895 return rc;
1896 }
1897
1898 rc = ibmvnic_init(adapter);
1899 if (rc)
1900 return rc;
1901
1902 /* If the adapter was in PROBE state prior to the reset,
1903 * exit here.
1904 */
1905 if (reset_state == VNIC_PROBED)
1906 return 0;
1907
1908 rc = ibmvnic_login(netdev);
1909 if (rc) {
1910 adapter->state = VNIC_PROBED;
1911 return 0;
1912 }
a5681e20
JK		 1913
1914 rc = init_resources(adapter);
2770a798
TF		 1915 if (rc)
1916 return rc;
1917
1918 ibmvnic_disable_irqs(adapter);
1919 adapter->state = VNIC_CLOSED;
1920
1921 if (reset_state == VNIC_CLOSED)
1922 return 0;
1923
1924 rc = __ibmvnic_open(netdev);
1925 if (rc) {
1926 if (list_empty(&adapter->rwi_list))
1927 adapter->state = VNIC_CLOSED;
1928 else
1929 adapter->state = reset_state;
1930
1931 return 0;
1932 }
1933
1934 netif_carrier_on(netdev);
1935
1936 return 0;
1937}
1938
ed651a10
NF		 1939static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1940{
1941 struct ibmvnic_rwi *rwi;
1942
1943 mutex_lock(&adapter->rwi_lock);
1944
1945 if (!list_empty(&adapter->rwi_list)) {
1946 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1947 list);
1948 list_del(&rwi->list);
1949 } else {
1950 rwi = NULL;
1951 }
1952
1953 mutex_unlock(&adapter->rwi_lock);
1954 return rwi;
1955}
1956
1957static void free_all_rwi(struct ibmvnic_adapter *adapter)
1958{
1959 struct ibmvnic_rwi *rwi;
1960
1961 rwi = get_next_rwi(adapter);
1962 while (rwi) {
1963 kfree(rwi);
1964 rwi = get_next_rwi(adapter);
1965 }
1966}
1967
1968static void __ibmvnic_reset(struct work_struct *work)
1969{
1970 struct ibmvnic_rwi *rwi;
1971 struct ibmvnic_adapter *adapter;
1972 struct net_device *netdev;
a5681e20 1973 bool we_lock_rtnl = false;
ed651a10 1974 u32 reset_state;
c26eba03 1975 int rc = 0;
ed651a10
NF		 1976
1977 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1978 netdev = adapter->netdev;
1979
a5681e20
JK		 1980 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1981 * unless wait_for_reset is set, in which case the rtnl lock
1982 * has already been taken before initializing the reset
1983 */
1984 if (!adapter->wait_for_reset) {
1985 rtnl_lock();
1986 we_lock_rtnl = true;
1987 }
ed651a10
NF		 1988 reset_state = adapter->state;
1989
1990 rwi = get_next_rwi(adapter);
1991 while (rwi) {
2770a798
TF		 1992 if (adapter->force_reset_recovery) {
1993 adapter->force_reset_recovery = false;
1994 rc = do_hard_reset(adapter, rwi, reset_state);
1995 } else {
1996 rc = do_reset(adapter, rwi, reset_state);
1997 }
ed651a10 1998 kfree(rwi);
2770a798
TF		 1999 if (rc && rc != IBMVNIC_INIT_FAILED &&
2000 !adapter->force_reset_recovery)
ed651a10
NF		 2001 break;
2002
2003 rwi = get_next_rwi(adapter);
2004 }
2005
c26eba03
JA		 2006 if (adapter->wait_for_reset) {
2007 adapter->wait_for_reset = false;
2008 adapter->reset_done_rc = rc;
2009 complete(&adapter->reset_done);
2010 }
2011
ed651a10 2012 if (rc) {
d1cf33d9 2013 netdev_dbg(adapter->netdev, "Reset failed\n");
ed651a10 2014 free_all_rwi(adapter);
ed651a10
NF		 2015 }
2016
2017 adapter->resetting = false;
a5681e20
JK		 2018 if (we_lock_rtnl)
2019 rtnl_unlock();
ed651a10
NF		 2020}
2021
af894d23
TF		 2022static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2023 enum ibmvnic_reset_reason reason)
ed651a10 2024{
2770a798 2025 struct list_head *entry, *tmp_entry;
ed651a10
NF		 2026 struct ibmvnic_rwi *rwi, *tmp;
2027 struct net_device *netdev = adapter->netdev;
af894d23 2028 int ret;
ed651a10
NF		 2029
2030 if (adapter->state == VNIC_REMOVING ||
5a18e1e0
TF		 2031 adapter->state == VNIC_REMOVED ||
2032 adapter->failover_pending) {
af894d23 2033 ret = EBUSY;
5a18e1e0 2034 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
af894d23 2035 goto err;
ed651a10
NF		 2036 }
2037
6a2fb0e9
NF		 2038 if (adapter->state == VNIC_PROBING) {
2039 netdev_warn(netdev, "Adapter reset during probe\n");
af894d23
TF		 2040 ret = adapter->init_done_rc = EAGAIN;
2041 goto err;
6a2fb0e9
NF		 2042 }
2043
ed651a10
NF		 2044 mutex_lock(&adapter->rwi_lock);
2045
2046 list_for_each(entry, &adapter->rwi_list) {
2047 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2048 if (tmp->reset_reason == reason) {
d1cf33d9 2049 netdev_dbg(netdev, "Skipping matching reset\n");
ed651a10 2050 mutex_unlock(&adapter->rwi_lock);
af894d23
TF		 2051 ret = EBUSY;
2052 goto err;
ed651a10
NF		 2053 }
2054 }
2055
2056 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
2057 if (!rwi) {
2058 mutex_unlock(&adapter->rwi_lock);
2059 ibmvnic_close(netdev);
af894d23
TF		 2060 ret = ENOMEM;
2061 goto err;
ed651a10 2062 }
2770a798
TF		 2063 /* if we just received a transport event,
2064 * flush reset queue and process this reset
2065 */
2066 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2067 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2068 list_del(entry);
2069 }
ed651a10
NF		 2070 rwi->reset_reason = reason;
2071 list_add_tail(&rwi->list, &adapter->rwi_list);
2072 mutex_unlock(&adapter->rwi_lock);
06e43d7f 2073 adapter->resetting = true;
d1cf33d9 2074 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
ed651a10 2075 schedule_work(&adapter->ibmvnic_reset);
af894d23
TF		 2076
2077 return 0;
2078err:
2079 if (adapter->wait_for_reset)
2080 adapter->wait_for_reset = false;
2081 return -ret;
ed651a10
NF		 2082}
2083
2084static void ibmvnic_tx_timeout(struct net_device *dev)
2085{
2086 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2087
2088 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 2089}
2090
2091static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2092 struct ibmvnic_rx_buff *rx_buff)
2093{
2094 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2095
2096 rx_buff->skb = NULL;
2097
2098 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2099 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2100
2101 atomic_dec(&pool->available);
2102}
2103
2104static int ibmvnic_poll(struct napi_struct *napi, int budget)
2105{
2106 struct net_device *netdev = napi->dev;
2107 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2108 int scrq_num = (int)(napi - adapter->napi);
2109 int frames_processed = 0;
152ce47d 2110
032c5e82
TF		 2111restart_poll:
2112 while (frames_processed < budget) {
2113 struct sk_buff *skb;
2114 struct ibmvnic_rx_buff *rx_buff;
2115 union sub_crq *next;
2116 u32 length;
2117 u16 offset;
2118 u8 flags = 0;
2119
3468656f
JA		 2120 if (unlikely(adapter->resetting &&
2121 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
21ecba6c
TF		 2122 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2123 napi_complete_done(napi, frames_processed);
2124 return frames_processed;
2125 }
2126
032c5e82
TF		 2127 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2128 break;
2129 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2130 rx_buff =
2131 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2132 rx_comp.correlator);
2133 /* do error checking */
2134 if (next->rx_comp.rc) {
e1cea2e7
JA		 2135 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2136 be16_to_cpu(next->rx_comp.rc));
032c5e82
TF		 2137 /* free the entry */
2138 next->rx_comp.first = 0;
4b9b0f01 2139 dev_kfree_skb_any(rx_buff->skb);
032c5e82 2140 remove_buff_from_pool(adapter, rx_buff);
ca05e316 2141 continue;
abe27a88
TF		 2142 } else if (!rx_buff->skb) {
2143 /* free the entry */
2144 next->rx_comp.first = 0;
2145 remove_buff_from_pool(adapter, rx_buff);
2146 continue;
032c5e82
TF		 2147 }
2148
2149 length = be32_to_cpu(next->rx_comp.len);
2150 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2151 flags = next->rx_comp.flags;
2152 skb = rx_buff->skb;
2153 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2154 length);
6052d5e2
MFV		 2155
2156 /* VLAN Header has been stripped by the system firmware and
2157 * needs to be inserted by the driver
2158 */
2159 if (adapter->rx_vlan_header_insertion &&
2160 (flags & IBMVNIC_VLAN_STRIPPED))
2161 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2162 ntohs(next->rx_comp.vlan_tci));
2163
032c5e82
TF		 2164 /* free the entry */
2165 next->rx_comp.first = 0;
2166 remove_buff_from_pool(adapter, rx_buff);
2167
2168 skb_put(skb, length);
2169 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 2170 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 2171
2172 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2173 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2174 skb->ip_summed = CHECKSUM_UNNECESSARY;
2175 }
2176
2177 length = skb->len;
2178 napi_gro_receive(napi, skb); /* send it up */
2179 netdev->stats.rx_packets++;
2180 netdev->stats.rx_bytes += length;
3d52b594
JA		 2181 adapter->rx_stats_buffers[scrq_num].packets++;
2182 adapter->rx_stats_buffers[scrq_num].bytes += length;
032c5e82
TF		 2183 frames_processed++;
2184 }
152ce47d
NF		 2185
2186 if (adapter->state != VNIC_CLOSING)
2187 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 2188
2189 if (frames_processed < budget) {
2190 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 2191 napi_complete_done(napi, frames_processed);
032c5e82
TF		 2192 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2193 napi_reschedule(napi)) {
2194 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2195 goto restart_poll;
2196 }
2197 }
2198 return frames_processed;
2199}
2200
c26eba03
JA		 2201static int wait_for_reset(struct ibmvnic_adapter *adapter)
2202{
af894d23
TF		 2203 int rc, ret;
2204
c26eba03
JA		 2205 adapter->fallback.mtu = adapter->req_mtu;
2206 adapter->fallback.rx_queues = adapter->req_rx_queues;
2207 adapter->fallback.tx_queues = adapter->req_tx_queues;
2208 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2209 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2210
2211 init_completion(&adapter->reset_done);
c26eba03 2212 adapter->wait_for_reset = true;
af894d23
TF		 2213 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2214 if (rc)
2215 return rc;
c26eba03
JA		 2216 wait_for_completion(&adapter->reset_done);
2217
af894d23 2218 ret = 0;
c26eba03 2219 if (adapter->reset_done_rc) {
af894d23 2220 ret = -EIO;
c26eba03
JA		 2221 adapter->desired.mtu = adapter->fallback.mtu;
2222 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2223 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2224 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2225 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2226
2227 init_completion(&adapter->reset_done);
af894d23
TF		 2228 adapter->wait_for_reset = true;
2229 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2230 if (rc)
2231 return ret;
c26eba03
JA		 2232 wait_for_completion(&adapter->reset_done);
2233 }
2234 adapter->wait_for_reset = false;
2235
af894d23 2236 return ret;
c26eba03
JA		 2237}
2238
3a807b75
JA		 2239static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2240{
c26eba03
JA		 2241 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2242
2243 adapter->desired.mtu = new_mtu + ETH_HLEN;
2244
2245 return wait_for_reset(adapter);
3a807b75
JA		 2246}
2247
f10b09ef
TF		 2248static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2249 struct net_device *dev,
2250 netdev_features_t features)
2251{
2252 /* Some backing hardware adapters can not
2253 * handle packets with a MSS less than 224
2254 * or with only one segment.
2255 */
2256 if (skb_is_gso(skb)) {
2257 if (skb_shinfo(skb)->gso_size < 224 ||
2258 skb_shinfo(skb)->gso_segs == 1)
2259 features &= ~NETIF_F_GSO_MASK;
2260 }
2261
2262 return features;
2263}
2264
032c5e82
TF		 2265static const struct net_device_ops ibmvnic_netdev_ops = {
2266 .ndo_open = ibmvnic_open,
2267 .ndo_stop = ibmvnic_close,
2268 .ndo_start_xmit = ibmvnic_xmit,
2269 .ndo_set_rx_mode = ibmvnic_set_multi,
2270 .ndo_set_mac_address = ibmvnic_set_mac,
2271 .ndo_validate_addr = eth_validate_addr,
032c5e82 2272 .ndo_tx_timeout = ibmvnic_tx_timeout,
3a807b75 2273 .ndo_change_mtu = ibmvnic_change_mtu,
f10b09ef 2274 .ndo_features_check = ibmvnic_features_check,
032c5e82
TF		 2275};
2276
2277/* ethtool functions */
2278
8a43379f
PR		 2279static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2280 struct ethtool_link_ksettings *cmd)
032c5e82 2281{
8a43379f
PR		 2282 u32 supported, advertising;
2283
2284 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 2285 SUPPORTED_FIBRE);
8a43379f 2286 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 2287 ADVERTISED_FIBRE);
8a43379f
PR		 2288 cmd->base.speed = SPEED_1000;
2289 cmd->base.duplex = DUPLEX_FULL;
2290 cmd->base.port = PORT_FIBRE;
2291 cmd->base.phy_address = 0;
2292 cmd->base.autoneg = AUTONEG_ENABLE;
2293
2294 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2295 supported);
2296 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2297 advertising);
2298
032c5e82
TF		 2299 return 0;
2300}
2301
4e6759be 2302static void ibmvnic_get_drvinfo(struct net_device *netdev,
032c5e82
TF		 2303 struct ethtool_drvinfo *info)
2304{
4e6759be
DANR		 2305 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2306
032c5e82
TF		 2307 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2308 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
4e6759be
DANR		 2309 strlcpy(info->fw_version, adapter->fw_version,
2310 sizeof(info->fw_version));
032c5e82
TF		 2311}
2312
2313static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2314{
2315 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2316
2317 return adapter->msg_enable;
2318}
2319
2320static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2321{
2322 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2323
2324 adapter->msg_enable = data;
2325}
2326
2327static u32 ibmvnic_get_link(struct net_device *netdev)
2328{
2329 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2330
2331 /* Don't need to send a query because we request a logical link up at
2332 * init and then we wait for link state indications
2333 */
2334 return adapter->logical_link_state;
2335}
2336
2337static void ibmvnic_get_ringparam(struct net_device *netdev,
2338 struct ethtool_ringparam *ring)
2339{
bc131b3a
JA		 2340 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2341
723ad916
TF		 2342 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2343 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2344 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2345 } else {
2346 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2347 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2348 }
032c5e82
TF		 2349 ring->rx_mini_max_pending = 0;
2350 ring->rx_jumbo_max_pending = 0;
bc131b3a
JA		 2351 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2352 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2353 ring->rx_mini_pending = 0;
2354 ring->rx_jumbo_pending = 0;
2355}
2356
c26eba03
JA		 2357static int ibmvnic_set_ringparam(struct net_device *netdev,
2358 struct ethtool_ringparam *ring)
2359{
2360 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
723ad916 2361 int ret;
c26eba03 2362
723ad916 2363 ret = 0;
c26eba03
JA		 2364 adapter->desired.rx_entries = ring->rx_pending;
2365 adapter->desired.tx_entries = ring->tx_pending;
2366
723ad916
TF		 2367 ret = wait_for_reset(adapter);
2368
2369 if (!ret &&
2370 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2371 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2372 netdev_info(netdev,
2373 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2374 ring->rx_pending, ring->tx_pending,
2375 adapter->req_rx_add_entries_per_subcrq,
2376 adapter->req_tx_entries_per_subcrq);
2377 return ret;
c26eba03
JA		 2378}
2379
c2dbeb67
JA		 2380static void ibmvnic_get_channels(struct net_device *netdev,
2381 struct ethtool_channels *channels)
2382{
2383 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2384
723ad916
TF		 2385 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2386 channels->max_rx = adapter->max_rx_queues;
2387 channels->max_tx = adapter->max_tx_queues;
2388 } else {
2389 channels->max_rx = IBMVNIC_MAX_QUEUES;
2390 channels->max_tx = IBMVNIC_MAX_QUEUES;
2391 }
2392
c2dbeb67
JA		 2393 channels->max_other = 0;
2394 channels->max_combined = 0;
2395 channels->rx_count = adapter->req_rx_queues;
2396 channels->tx_count = adapter->req_tx_queues;
2397 channels->other_count = 0;
2398 channels->combined_count = 0;
2399}
2400
c26eba03
JA		 2401static int ibmvnic_set_channels(struct net_device *netdev,
2402 struct ethtool_channels *channels)
2403{
2404 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
723ad916 2405 int ret;
c26eba03 2406
723ad916 2407 ret = 0;
c26eba03
JA		 2408 adapter->desired.rx_queues = channels->rx_count;
2409 adapter->desired.tx_queues = channels->tx_count;
2410
723ad916
TF		 2411 ret = wait_for_reset(adapter);
2412
2413 if (!ret &&
2414 (adapter->req_rx_queues != channels->rx_count ||
2415 adapter->req_tx_queues != channels->tx_count))
2416 netdev_info(netdev,
2417 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2418 channels->rx_count, channels->tx_count,
2419 adapter->req_rx_queues, adapter->req_tx_queues);
2420 return ret;
2421
c26eba03
JA		 2422}
2423
032c5e82
TF		 2424static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2425{
3d52b594 2426 struct ibmvnic_adapter *adapter = netdev_priv(dev);
032c5e82
TF		 2427 int i;
2428
723ad916
TF		 2429 switch (stringset) {
2430 case ETH_SS_STATS:
2431 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2432 i++, data += ETH_GSTRING_LEN)
2433 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
032c5e82 2434
723ad916
TF		 2435 for (i = 0; i < adapter->req_tx_queues; i++) {
2436 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2437 data += ETH_GSTRING_LEN;
3d52b594 2438
723ad916
TF		 2439 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2440 data += ETH_GSTRING_LEN;
3d52b594 2441
723ad916
TF		 2442 snprintf(data, ETH_GSTRING_LEN,
2443 "tx%d_dropped_packets", i);
2444 data += ETH_GSTRING_LEN;
2445 }
3d52b594 2446
723ad916
TF		 2447 for (i = 0; i < adapter->req_rx_queues; i++) {
2448 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2449 data += ETH_GSTRING_LEN;
3d52b594 2450
723ad916
TF		 2451 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2452 data += ETH_GSTRING_LEN;
3d52b594 2453
723ad916
TF		 2454 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2455 data += ETH_GSTRING_LEN;
2456 }
2457 break;
3d52b594 2458
723ad916
TF		 2459 case ETH_SS_PRIV_FLAGS:
2460 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2461 strcpy(data + i * ETH_GSTRING_LEN,
2462 ibmvnic_priv_flags[i]);
2463 break;
2464 default:
2465 return;
3d52b594 2466 }
032c5e82
TF		 2467}
2468
2469static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2470{
3d52b594
JA		 2471 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2472
032c5e82
TF		 2473 switch (sset) {
2474 case ETH_SS_STATS:
3d52b594
JA		 2475 return ARRAY_SIZE(ibmvnic_stats) +
2476 adapter->req_tx_queues * NUM_TX_STATS +
2477 adapter->req_rx_queues * NUM_RX_STATS;
723ad916
TF		 2478 case ETH_SS_PRIV_FLAGS:
2479 return ARRAY_SIZE(ibmvnic_priv_flags);
032c5e82
TF		 2480 default:
2481 return -EOPNOTSUPP;
2482 }
2483}
2484
2485static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2486 struct ethtool_stats *stats, u64 *data)
2487{
2488 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2489 union ibmvnic_crq crq;
3d52b594 2490 int i, j;
9c4eaabd 2491 int rc;
032c5e82
TF		 2492
2493 memset(&crq, 0, sizeof(crq));
2494 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2495 crq.request_statistics.cmd = REQUEST_STATISTICS;
2496 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2497 crq.request_statistics.len =
2498 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 2499
2500 /* Wait for data to be written */
2501 init_completion(&adapter->stats_done);
9c4eaabd
TF		 2502 rc = ibmvnic_send_crq(adapter, &crq);
2503 if (rc)
2504 return;
032c5e82
TF		 2505 wait_for_completion(&adapter->stats_done);
2506
2507 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
52da5c11
JA		 2508 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2509 ibmvnic_stats[i].offset));
3d52b594
JA		 2510
2511 for (j = 0; j < adapter->req_tx_queues; j++) {
2512 data[i] = adapter->tx_stats_buffers[j].packets;
2513 i++;
2514 data[i] = adapter->tx_stats_buffers[j].bytes;
2515 i++;
2516 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2517 i++;
2518 }
2519
2520 for (j = 0; j < adapter->req_rx_queues; j++) {
2521 data[i] = adapter->rx_stats_buffers[j].packets;
2522 i++;
2523 data[i] = adapter->rx_stats_buffers[j].bytes;
2524 i++;
2525 data[i] = adapter->rx_stats_buffers[j].interrupts;
2526 i++;
2527 }
032c5e82
TF		 2528}
2529
723ad916
TF		 2530static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2531{
2532 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2533
2534 return adapter->priv_flags;
2535}
2536
2537static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2538{
2539 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2540 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2541
2542 if (which_maxes)
2543 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2544 else
2545 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2546
2547 return 0;
2548}
032c5e82 2549static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 2550 .get_drvinfo = ibmvnic_get_drvinfo,
2551 .get_msglevel = ibmvnic_get_msglevel,
2552 .set_msglevel = ibmvnic_set_msglevel,
2553 .get_link = ibmvnic_get_link,
2554 .get_ringparam = ibmvnic_get_ringparam,
c26eba03 2555 .set_ringparam = ibmvnic_set_ringparam,
c2dbeb67 2556 .get_channels = ibmvnic_get_channels,
c26eba03 2557 .set_channels = ibmvnic_set_channels,
032c5e82
TF		 2558 .get_strings = ibmvnic_get_strings,
2559 .get_sset_count = ibmvnic_get_sset_count,
2560 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 2561 .get_link_ksettings = ibmvnic_get_link_ksettings,
723ad916
TF		 2562 .get_priv_flags = ibmvnic_get_priv_flags,
2563 .set_priv_flags = ibmvnic_set_priv_flags,
032c5e82
TF		 2564};
2565
2566/* Routines for managing CRQs/sCRQs */
2567
57a49436
NF		 2568static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2569 struct ibmvnic_sub_crq_queue *scrq)
2570{
2571 int rc;
2572
2573 if (scrq->irq) {
2574 free_irq(scrq->irq, scrq);
2575 irq_dispose_mapping(scrq->irq);
2576 scrq->irq = 0;
2577 }
2578
c8b2ad0a 2579 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
41f71467 2580 atomic_set(&scrq->used, 0);
57a49436
NF		 2581 scrq->cur = 0;
2582
2583 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2584 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2585 return rc;
2586}
2587
2588static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2589{
2590 int i, rc;
2591
2592 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 2593 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
57a49436
NF		 2594 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2595 if (rc)
2596 return rc;
2597 }
2598
2599 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 2600 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
57a49436
NF		 2601 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2602 if (rc)
2603 return rc;
2604 }
2605
57a49436
NF		 2606 return rc;
2607}
2608
032c5e82 2609static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
d7c0ef36
NF		 2610 struct ibmvnic_sub_crq_queue *scrq,
2611 bool do_h_free)
032c5e82
TF		 2612{
2613 struct device *dev = &adapter->vdev->dev;
2614 long rc;
2615
2616 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2617
d7c0ef36
NF		 2618 if (do_h_free) {
2619 /* Close the sub-crqs */
2620 do {
2621 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2622 adapter->vdev->unit_address,
2623 scrq->crq_num);
2624 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
032c5e82 2625
d7c0ef36
NF		 2626 if (rc) {
2627 netdev_err(adapter->netdev,
2628 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2629 scrq->crq_num, rc);
2630 }
ffa73855
TF		 2631 }
2632
032c5e82
TF		 2633 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2634 DMA_BIDIRECTIONAL);
2635 free_pages((unsigned long)scrq->msgs, 2);
2636 kfree(scrq);
2637}
2638
2639static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2640 *adapter)
2641{
2642 struct device *dev = &adapter->vdev->dev;
2643 struct ibmvnic_sub_crq_queue *scrq;
2644 int rc;
2645
1bb3c739 2646 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 2647 if (!scrq)
2648 return NULL;
2649
7f7adc50 2650 scrq->msgs =
1bb3c739 2651 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 2652 if (!scrq->msgs) {
2653 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2654 goto zero_page_failed;
2655 }
2656
2657 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2658 DMA_BIDIRECTIONAL);
2659 if (dma_mapping_error(dev, scrq->msg_token)) {
2660 dev_warn(dev, "Couldn't map crq queue messages page\n");
2661 goto map_failed;
2662 }
2663
2664 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2665 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2666
2667 if (rc == H_RESOURCE)
2668 rc = ibmvnic_reset_crq(adapter);
2669
2670 if (rc == H_CLOSED) {
2671 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2672 } else if (rc) {
2673 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2674 goto reg_failed;
2675 }
2676
032c5e82
TF		 2677 scrq->adapter = adapter;
2678 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 2679 spin_lock_init(&scrq->lock);
2680
2681 netdev_dbg(adapter->netdev,
2682 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2683 scrq->crq_num, scrq->hw_irq, scrq->irq);
2684
2685 return scrq;
2686
032c5e82
TF		 2687reg_failed:
2688 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2689 DMA_BIDIRECTIONAL);
2690map_failed:
2691 free_pages((unsigned long)scrq->msgs, 2);
2692zero_page_failed:
2693 kfree(scrq);
2694
2695 return NULL;
2696}
2697
d7c0ef36 2698static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
032c5e82
TF		 2699{
2700 int i;
2701
2702 if (adapter->tx_scrq) {
82e3be32 2703 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
b510888f
NF		 2704 if (!adapter->tx_scrq[i])
2705 continue;
2706
d1cf33d9
NF		 2707 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2708 i);
b510888f 2709 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 2710 free_irq(adapter->tx_scrq[i]->irq,
2711 adapter->tx_scrq[i]);
88eb98a0 2712 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 2713 adapter->tx_scrq[i]->irq = 0;
032c5e82 2714 }
b510888f 2715
d7c0ef36
NF		 2716 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2717 do_h_free);
b510888f
NF		 2718 }
2719
9501df3c 2720 kfree(adapter->tx_scrq);
032c5e82 2721 adapter->tx_scrq = NULL;
82e3be32 2722 adapter->num_active_tx_scrqs = 0;
032c5e82
TF		 2723 }
2724
2725 if (adapter->rx_scrq) {
82e3be32 2726 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
b510888f
NF		 2727 if (!adapter->rx_scrq[i])
2728 continue;
2729
d1cf33d9
NF		 2730 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2731 i);
b510888f 2732 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 2733 free_irq(adapter->rx_scrq[i]->irq,
2734 adapter->rx_scrq[i]);
88eb98a0 2735 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 2736 adapter->rx_scrq[i]->irq = 0;
032c5e82 2737 }
032c5e82 2738
d7c0ef36
NF		 2739 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2740 do_h_free);
b510888f 2741 }
ea22d51a 2742
b510888f 2743 kfree(adapter->rx_scrq);
ea22d51a 2744 adapter->rx_scrq = NULL;
82e3be32 2745 adapter->num_active_rx_scrqs = 0;
ea22d51a 2746 }
ea22d51a
TF		 2747}
2748
032c5e82
TF		 2749static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2750 struct ibmvnic_sub_crq_queue *scrq)
2751{
2752 struct device *dev = &adapter->vdev->dev;
2753 unsigned long rc;
2754
2755 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2756 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2757 if (rc)
2758 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2759 scrq->hw_irq, rc);
2760 return rc;
2761}
2762
2763static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2764 struct ibmvnic_sub_crq_queue *scrq)
2765{
2766 struct device *dev = &adapter->vdev->dev;
2767 unsigned long rc;
2768
2769 if (scrq->hw_irq > 0x100000000ULL) {
2770 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2771 return 1;
2772 }
2773
73f9d364
NF		 2774 if (adapter->resetting &&
2775 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2776 u64 val = (0xff000000) | scrq->hw_irq;
2777
2778 rc = plpar_hcall_norets(H_EOI, val);
2779 if (rc)
2780 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2781 val, rc);
2782 }
f23e0643 2783
032c5e82
TF		 2784 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2785 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2786 if (rc)
2787 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2788 scrq->hw_irq, rc);
2789 return rc;
2790}
2791
2792static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2793 struct ibmvnic_sub_crq_queue *scrq)
2794{
2795 struct device *dev = &adapter->vdev->dev;
06b3e357 2796 struct ibmvnic_tx_pool *tx_pool;
032c5e82
TF		 2797 struct ibmvnic_tx_buff *txbuff;
2798 union sub_crq *next;
2799 int index;
2800 int i, j;
37e40fa8 2801 u8 *first;
032c5e82
TF		 2802
2803restart_loop:
2804 while (pending_scrq(adapter, scrq)) {
2805 unsigned int pool = scrq->pool_index;
ffc385b9 2806 int num_entries = 0;
032c5e82
TF		 2807
2808 next = ibmvnic_next_scrq(adapter, scrq);
2809 for (i = 0; i < next->tx_comp.num_comps; i++) {
2810 if (next->tx_comp.rcs[i]) {
2811 dev_err(dev, "tx error %x\n",
2812 next->tx_comp.rcs[i]);
2813 continue;
2814 }
2815 index = be32_to_cpu(next->tx_comp.correlators[i]);
06b3e357
TF		 2816 if (index & IBMVNIC_TSO_POOL_MASK) {
2817 tx_pool = &adapter->tso_pool[pool];
2818 index &= ~IBMVNIC_TSO_POOL_MASK;
2819 } else {
2820 tx_pool = &adapter->tx_pool[pool];
2821 }
2822
2823 txbuff = &tx_pool->tx_buff[index];
032c5e82
TF		 2824
2825 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2826 if (!txbuff->data_dma[j])
2827 continue;
2828
2829 txbuff->data_dma[j] = 0;
032c5e82 2830 }
ad7775dc 2831 /* if sub_crq was sent indirectly */
37e40fa8
TF		 2832 first = &txbuff->indir_arr[0].generic.first;
2833 if (*first == IBMVNIC_CRQ_CMD) {
ad7775dc
TF		 2834 dma_unmap_single(dev, txbuff->indir_dma,
2835 sizeof(txbuff->indir_arr),
2836 DMA_TO_DEVICE);
37e40fa8 2837 *first = 0;
ad7775dc 2838 }
032c5e82 2839
142c0ac4 2840 if (txbuff->last_frag) {
032c5e82 2841 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 2842 txbuff->skb = NULL;
142c0ac4 2843 }
032c5e82 2844
ffc385b9
TF		 2845 num_entries += txbuff->num_entries;
2846
06b3e357
TF		 2847 tx_pool->free_map[tx_pool->producer_index] = index;
2848 tx_pool->producer_index =
2849 (tx_pool->producer_index + 1) %
2850 tx_pool->num_buffers;
032c5e82
TF		 2851 }
2852 /* remove tx_comp scrq*/
2853 next->tx_comp.first = 0;
7c3e7de3 2854
ffc385b9 2855 if (atomic_sub_return(num_entries, &scrq->used) <=
7c3e7de3
NF		 2856 (adapter->req_tx_entries_per_subcrq / 2) &&
2857 __netif_subqueue_stopped(adapter->netdev,
2858 scrq->pool_index)) {
2859 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
0aecb13c
TF		 2860 netdev_dbg(adapter->netdev, "Started queue %d\n",
2861 scrq->pool_index);
7c3e7de3 2862 }
032c5e82
TF		 2863 }
2864
2865 enable_scrq_irq(adapter, scrq);
2866
2867 if (pending_scrq(adapter, scrq)) {
2868 disable_scrq_irq(adapter, scrq);
2869 goto restart_loop;
2870 }
2871
2872 return 0;
2873}
2874
2875static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2876{
2877 struct ibmvnic_sub_crq_queue *scrq = instance;
2878 struct ibmvnic_adapter *adapter = scrq->adapter;
2879
2880 disable_scrq_irq(adapter, scrq);
2881 ibmvnic_complete_tx(adapter, scrq);
2882
2883 return IRQ_HANDLED;
2884}
2885
2886static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2887{
2888 struct ibmvnic_sub_crq_queue *scrq = instance;
2889 struct ibmvnic_adapter *adapter = scrq->adapter;
2890
09fb35ea
NF		 2891 /* When booting a kdump kernel we can hit pending interrupts
2892 * prior to completing driver initialization.
2893 */
2894 if (unlikely(adapter->state != VNIC_OPEN))
2895 return IRQ_NONE;
2896
3d52b594
JA		 2897 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2898
032c5e82
TF		 2899 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2900 disable_scrq_irq(adapter, scrq);
2901 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2902 }
2903
2904 return IRQ_HANDLED;
2905}
2906
ea22d51a
TF		 2907static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2908{
2909 struct device *dev = &adapter->vdev->dev;
2910 struct ibmvnic_sub_crq_queue *scrq;
2911 int i = 0, j = 0;
2912 int rc = 0;
2913
2914 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9
NF		 2915 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2916 i);
ea22d51a
TF		 2917 scrq = adapter->tx_scrq[i];
2918 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2919
99c1790e 2920 if (!scrq->irq) {
ea22d51a
TF		 2921 rc = -EINVAL;
2922 dev_err(dev, "Error mapping irq\n");
2923 goto req_tx_irq_failed;
2924 }
2925
2926 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2927 0, "ibmvnic_tx", scrq);
2928
2929 if (rc) {
2930 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2931 scrq->irq, rc);
2932 irq_dispose_mapping(scrq->irq);
af9090c2 2933 goto req_tx_irq_failed;
ea22d51a
TF		 2934 }
2935 }
2936
2937 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 2938 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2939 i);
ea22d51a
TF		 2940 scrq = adapter->rx_scrq[i];
2941 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2942 if (!scrq->irq) {
ea22d51a
TF		 2943 rc = -EINVAL;
2944 dev_err(dev, "Error mapping irq\n");
2945 goto req_rx_irq_failed;
2946 }
2947 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2948 0, "ibmvnic_rx", scrq);
2949 if (rc) {
2950 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2951 scrq->irq, rc);
2952 irq_dispose_mapping(scrq->irq);
2953 goto req_rx_irq_failed;
2954 }
2955 }
2956 return rc;
2957
2958req_rx_irq_failed:
8bf371e6 2959 for (j = 0; j < i; j++) {
ea22d51a
TF		 2960 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2961 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2962 }
ea22d51a
TF		 2963 i = adapter->req_tx_queues;
2964req_tx_irq_failed:
8bf371e6 2965 for (j = 0; j < i; j++) {
ea22d51a
TF		 2966 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2967 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2968 }
d7c0ef36 2969 release_sub_crqs(adapter, 1);
ea22d51a
TF		 2970 return rc;
2971}
2972
d346b9bc 2973static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2974{
2975 struct device *dev = &adapter->vdev->dev;
2976 struct ibmvnic_sub_crq_queue **allqueues;
2977 int registered_queues = 0;
032c5e82
TF		 2978 int total_queues;
2979 int more = 0;
ea22d51a 2980 int i;
032c5e82 2981
032c5e82
TF		 2982 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2983
1bb3c739 2984 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2985 if (!allqueues)
d346b9bc 2986 return -1;
032c5e82
TF		 2987
2988 for (i = 0; i < total_queues; i++) {
2989 allqueues[i] = init_sub_crq_queue(adapter);
2990 if (!allqueues[i]) {
2991 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2992 break;
2993 }
2994 registered_queues++;
2995 }
2996
2997 /* Make sure we were able to register the minimum number of queues */
2998 if (registered_queues <
2999 adapter->min_tx_queues + adapter->min_rx_queues) {
3000 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3001 goto tx_failed;
3002 }
3003
3004 /* Distribute the failed allocated queues*/
3005 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3006 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3007 switch (i % 3) {
3008 case 0:
3009 if (adapter->req_rx_queues > adapter->min_rx_queues)
3010 adapter->req_rx_queues--;
3011 else
3012 more++;
3013 break;
3014 case 1:
3015 if (adapter->req_tx_queues > adapter->min_tx_queues)
3016 adapter->req_tx_queues--;
3017 else
3018 more++;
3019 break;
3020 }
3021 }
3022
3023 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 3024 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 3025 if (!adapter->tx_scrq)
3026 goto tx_failed;
3027
3028 for (i = 0; i < adapter->req_tx_queues; i++) {
3029 adapter->tx_scrq[i] = allqueues[i];
3030 adapter->tx_scrq[i]->pool_index = i;
82e3be32 3031 adapter->num_active_tx_scrqs++;
032c5e82
TF		 3032 }
3033
3034 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 3035 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 3036 if (!adapter->rx_scrq)
3037 goto rx_failed;
3038
3039 for (i = 0; i < adapter->req_rx_queues; i++) {
3040 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3041 adapter->rx_scrq[i]->scrq_num = i;
82e3be32 3042 adapter->num_active_rx_scrqs++;
032c5e82
TF		 3043 }
3044
d346b9bc
NF		 3045 kfree(allqueues);
3046 return 0;
3047
3048rx_failed:
3049 kfree(adapter->tx_scrq);
3050 adapter->tx_scrq = NULL;
3051tx_failed:
3052 for (i = 0; i < registered_queues; i++)
d7c0ef36 3053 release_sub_crq_queue(adapter, allqueues[i], 1);
d346b9bc
NF		 3054 kfree(allqueues);
3055 return -1;
3056}
3057
3058static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3059{
3060 struct device *dev = &adapter->vdev->dev;
3061 union ibmvnic_crq crq;
c26eba03 3062 int max_entries;
d346b9bc
NF		 3063
3064 if (!retry) {
3065 /* Sub-CRQ entries are 32 byte long */
3066 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3067
3068 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3069 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3070 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3071 return;
3072 }
3073
c26eba03
JA		 3074 if (adapter->desired.mtu)
3075 adapter->req_mtu = adapter->desired.mtu;
3076 else
3077 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3078
3079 if (!adapter->desired.tx_entries)
3080 adapter->desired.tx_entries =
3081 adapter->max_tx_entries_per_subcrq;
3082 if (!adapter->desired.rx_entries)
3083 adapter->desired.rx_entries =
3084 adapter->max_rx_add_entries_per_subcrq;
3085
3086 max_entries = IBMVNIC_MAX_LTB_SIZE /
3087 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3088
3089 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3090 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3091 adapter->desired.tx_entries = max_entries;
3092 }
d346b9bc 3093
c26eba03
JA		 3094 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3095 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3096 adapter->desired.rx_entries = max_entries;
3097 }
3098
3099 if (adapter->desired.tx_entries)
3100 adapter->req_tx_entries_per_subcrq =
3101 adapter->desired.tx_entries;
3102 else
3103 adapter->req_tx_entries_per_subcrq =
3104 adapter->max_tx_entries_per_subcrq;
3105
3106 if (adapter->desired.rx_entries)
3107 adapter->req_rx_add_entries_per_subcrq =
3108 adapter->desired.rx_entries;
3109 else
3110 adapter->req_rx_add_entries_per_subcrq =
3111 adapter->max_rx_add_entries_per_subcrq;
3112
3113 if (adapter->desired.tx_queues)
3114 adapter->req_tx_queues =
3115 adapter->desired.tx_queues;
3116 else
3117 adapter->req_tx_queues =
3118 adapter->opt_tx_comp_sub_queues;
3119
3120 if (adapter->desired.rx_queues)
3121 adapter->req_rx_queues =
3122 adapter->desired.rx_queues;
3123 else
3124 adapter->req_rx_queues =
3125 adapter->opt_rx_comp_queues;
3126
3127 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
d346b9bc
NF		 3128 }
3129
032c5e82
TF		 3130 memset(&crq, 0, sizeof(crq));
3131 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3132 crq.request_capability.cmd = REQUEST_CAPABILITY;
3133
3134 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 3135 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 3136 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3137 ibmvnic_send_crq(adapter, &crq);
3138
3139 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 3140 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 3141 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3142 ibmvnic_send_crq(adapter, &crq);
3143
3144 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 3145 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 3146 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3147 ibmvnic_send_crq(adapter, &crq);
3148
3149 crq.request_capability.capability =
3150 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3151 crq.request_capability.number =
de89e854 3152 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 3153 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3154 ibmvnic_send_crq(adapter, &crq);
3155
3156 crq.request_capability.capability =
3157 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3158 crq.request_capability.number =
de89e854 3159 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 3160 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3161 ibmvnic_send_crq(adapter, &crq);
3162
3163 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 3164 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 3165 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3166 ibmvnic_send_crq(adapter, &crq);
3167
3168 if (adapter->netdev->flags & IFF_PROMISC) {
3169 if (adapter->promisc_supported) {
3170 crq.request_capability.capability =
3171 cpu_to_be16(PROMISC_REQUESTED);
de89e854 3172 crq.request_capability.number = cpu_to_be64(1);
901e040a 3173 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3174 ibmvnic_send_crq(adapter, &crq);
3175 }
3176 } else {
3177 crq.request_capability.capability =
3178 cpu_to_be16(PROMISC_REQUESTED);
de89e854 3179 crq.request_capability.number = cpu_to_be64(0);
901e040a 3180 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3181 ibmvnic_send_crq(adapter, &crq);
3182 }
032c5e82
TF		 3183}
3184
3185static int pending_scrq(struct ibmvnic_adapter *adapter,
3186 struct ibmvnic_sub_crq_queue *scrq)
3187{
3188 union sub_crq *entry = &scrq->msgs[scrq->cur];
3189
1cf9cc72 3190 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
032c5e82
TF		 3191 return 1;
3192 else
3193 return 0;
3194}
3195
3196static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3197 struct ibmvnic_sub_crq_queue *scrq)
3198{
3199 union sub_crq *entry;
3200 unsigned long flags;
3201
3202 spin_lock_irqsave(&scrq->lock, flags);
3203 entry = &scrq->msgs[scrq->cur];
3204 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3205 if (++scrq->cur == scrq->size)
3206 scrq->cur = 0;
3207 } else {
3208 entry = NULL;
3209 }
3210 spin_unlock_irqrestore(&scrq->lock, flags);
3211
3212 return entry;
3213}
3214
3215static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3216{
3217 struct ibmvnic_crq_queue *queue = &adapter->crq;
3218 union ibmvnic_crq *crq;
3219
3220 crq = &queue->msgs[queue->cur];
3221 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3222 if (++queue->cur == queue->size)
3223 queue->cur = 0;
3224 } else {
3225 crq = NULL;
3226 }
3227
3228 return crq;
3229}
3230
2d14d379
TF		 3231static void print_subcrq_error(struct device *dev, int rc, const char *func)
3232{
3233 switch (rc) {
3234 case H_PARAMETER:
3235 dev_warn_ratelimited(dev,
3236 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3237 func, rc);
3238 break;
3239 case H_CLOSED:
3240 dev_warn_ratelimited(dev,
3241 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3242 func, rc);
3243 break;
3244 default:
3245 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3246 break;
3247 }
3248}
3249
032c5e82
TF		 3250static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3251 union sub_crq *sub_crq)
3252{
3253 unsigned int ua = adapter->vdev->unit_address;
3254 struct device *dev = &adapter->vdev->dev;
3255 u64 *u64_crq = (u64 *)sub_crq;
3256 int rc;
3257
3258 netdev_dbg(adapter->netdev,
3259 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3260 (unsigned long int)cpu_to_be64(remote_handle),
3261 (unsigned long int)cpu_to_be64(u64_crq[0]),
3262 (unsigned long int)cpu_to_be64(u64_crq[1]),
3263 (unsigned long int)cpu_to_be64(u64_crq[2]),
3264 (unsigned long int)cpu_to_be64(u64_crq[3]));
3265
3266 /* Make sure the hypervisor sees the complete request */
3267 mb();
3268
3269 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3270 cpu_to_be64(remote_handle),
3271 cpu_to_be64(u64_crq[0]),
3272 cpu_to_be64(u64_crq[1]),
3273 cpu_to_be64(u64_crq[2]),
3274 cpu_to_be64(u64_crq[3]));
3275
2d14d379
TF		 3276 if (rc)
3277 print_subcrq_error(dev, rc, __func__);
032c5e82
TF		 3278
3279 return rc;
3280}
3281
ad7775dc
TF		 3282static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3283 u64 remote_handle, u64 ioba, u64 num_entries)
3284{
3285 unsigned int ua = adapter->vdev->unit_address;
3286 struct device *dev = &adapter->vdev->dev;
3287 int rc;
3288
3289 /* Make sure the hypervisor sees the complete request */
3290 mb();
3291 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3292 cpu_to_be64(remote_handle),
3293 ioba, num_entries);
3294
2d14d379
TF		 3295 if (rc)
3296 print_subcrq_error(dev, rc, __func__);
ad7775dc
TF		 3297
3298 return rc;
3299}
3300
032c5e82
TF		 3301static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3302 union ibmvnic_crq *crq)
3303{
3304 unsigned int ua = adapter->vdev->unit_address;
3305 struct device *dev = &adapter->vdev->dev;
3306 u64 *u64_crq = (u64 *)crq;
3307 int rc;
3308
3309 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3310 (unsigned long int)cpu_to_be64(u64_crq[0]),
3311 (unsigned long int)cpu_to_be64(u64_crq[1]));
3312
5153698e
TF		 3313 if (!adapter->crq.active &&
3314 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3315 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3316 return -EINVAL;
3317 }
3318
032c5e82
TF		 3319 /* Make sure the hypervisor sees the complete request */
3320 mb();
3321
3322 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3323 cpu_to_be64(u64_crq[0]),
3324 cpu_to_be64(u64_crq[1]));
3325
3326 if (rc) {
ec95dffa 3327 if (rc == H_CLOSED) {
032c5e82 3328 dev_warn(dev, "CRQ Queue closed\n");
ec95dffa
NF		 3329 if (adapter->resetting)
3330 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3331 }
3332
032c5e82
TF		 3333 dev_warn(dev, "Send error (rc=%d)\n", rc);
3334 }
3335
3336 return rc;
3337}
3338
3339static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3340{
3341 union ibmvnic_crq crq;
3342
3343 memset(&crq, 0, sizeof(crq));
3344 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3345 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3346 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3347
3348 return ibmvnic_send_crq(adapter, &crq);
3349}
3350
032c5e82
TF		 3351static int send_version_xchg(struct ibmvnic_adapter *adapter)
3352{
3353 union ibmvnic_crq crq;
3354
3355 memset(&crq, 0, sizeof(crq));
3356 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3357 crq.version_exchange.cmd = VERSION_EXCHANGE;
3358 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3359
3360 return ibmvnic_send_crq(adapter, &crq);
3361}
3362
37798d02
NF		 3363struct vnic_login_client_data {
3364 u8 type;
3365 __be16 len;
08ea556e 3366 char name[];
37798d02
NF		 3367} __packed;
3368
3369static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3370{
3371 int len;
3372
3373 /* Calculate the amount of buffer space needed for the
3374 * vnic client data in the login buffer. There are four entries,
3375 * OS name, LPAR name, device name, and a null last entry.
3376 */
3377 len = 4 * sizeof(struct vnic_login_client_data);
3378 len += 6; /* "Linux" plus NULL */
3379 len += strlen(utsname()->nodename) + 1;
3380 len += strlen(adapter->netdev->name) + 1;
3381
3382 return len;
3383}
3384
3385static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3386 struct vnic_login_client_data *vlcd)
3387{
3388 const char *os_name = "Linux";
3389 int len;
3390
3391 /* Type 1 - LPAR OS */
3392 vlcd->type = 1;
3393 len = strlen(os_name) + 1;
3394 vlcd->len = cpu_to_be16(len);
08ea556e
KC		 3395 strncpy(vlcd->name, os_name, len);
3396 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
37798d02
NF		 3397
3398 /* Type 2 - LPAR name */
3399 vlcd->type = 2;
3400 len = strlen(utsname()->nodename) + 1;
3401 vlcd->len = cpu_to_be16(len);
08ea556e
KC		 3402 strncpy(vlcd->name, utsname()->nodename, len);
3403 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
37798d02
NF		 3404
3405 /* Type 3 - device name */
3406 vlcd->type = 3;
3407 len = strlen(adapter->netdev->name) + 1;
3408 vlcd->len = cpu_to_be16(len);
08ea556e 3409 strncpy(vlcd->name, adapter->netdev->name, len);
37798d02
NF		 3410}
3411
20a8ab74 3412static int send_login(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3413{
3414 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3415 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 3416 struct device *dev = &adapter->vdev->dev;
3417 dma_addr_t rsp_buffer_token;
3418 dma_addr_t buffer_token;
3419 size_t rsp_buffer_size;
3420 union ibmvnic_crq crq;
032c5e82
TF		 3421 size_t buffer_size;
3422 __be64 *tx_list_p;
3423 __be64 *rx_list_p;
37798d02
NF		 3424 int client_data_len;
3425 struct vnic_login_client_data *vlcd;
032c5e82
TF		 3426 int i;
3427
20a8ab74
TF		 3428 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3429 netdev_err(adapter->netdev,
3430 "RX or TX queues are not allocated, device login failed\n");
3431 return -1;
3432 }
3433
34f0f4e3 3434 release_login_rsp_buffer(adapter);
37798d02
NF		 3435 client_data_len = vnic_client_data_len(adapter);
3436
032c5e82
TF		 3437 buffer_size =
3438 sizeof(struct ibmvnic_login_buffer) +
37798d02
NF		 3439 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3440 client_data_len;
032c5e82 3441
37798d02 3442 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
032c5e82
TF		 3443 if (!login_buffer)
3444 goto buf_alloc_failed;
3445
3446 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3447 DMA_TO_DEVICE);
3448 if (dma_mapping_error(dev, buffer_token)) {
3449 dev_err(dev, "Couldn't map login buffer\n");
3450 goto buf_map_failed;
3451 }
3452
498cd8e4
JA		 3453 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3454 sizeof(u64) * adapter->req_tx_queues +
3455 sizeof(u64) * adapter->req_rx_queues +
3456 sizeof(u64) * adapter->req_rx_queues +
3457 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 3458
3459 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3460 if (!login_rsp_buffer)
3461 goto buf_rsp_alloc_failed;
3462
3463 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3464 rsp_buffer_size, DMA_FROM_DEVICE);
3465 if (dma_mapping_error(dev, rsp_buffer_token)) {
3466 dev_err(dev, "Couldn't map login rsp buffer\n");
3467 goto buf_rsp_map_failed;
3468 }
661a2622 3469
032c5e82
TF		 3470 adapter->login_buf = login_buffer;
3471 adapter->login_buf_token = buffer_token;
3472 adapter->login_buf_sz = buffer_size;
3473 adapter->login_rsp_buf = login_rsp_buffer;
3474 adapter->login_rsp_buf_token = rsp_buffer_token;
3475 adapter->login_rsp_buf_sz = rsp_buffer_size;
3476
3477 login_buffer->len = cpu_to_be32(buffer_size);
3478 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3479 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3480 login_buffer->off_txcomp_subcrqs =
3481 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3482 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3483 login_buffer->off_rxcomp_subcrqs =
3484 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3485 sizeof(u64) * adapter->req_tx_queues);
3486 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3487 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3488
3489 tx_list_p = (__be64 *)((char *)login_buffer +
3490 sizeof(struct ibmvnic_login_buffer));
3491 rx_list_p = (__be64 *)((char *)login_buffer +
3492 sizeof(struct ibmvnic_login_buffer) +
3493 sizeof(u64) * adapter->req_tx_queues);
3494
3495 for (i = 0; i < adapter->req_tx_queues; i++) {
3496 if (adapter->tx_scrq[i]) {
3497 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3498 crq_num);
3499 }
3500 }
3501
3502 for (i = 0; i < adapter->req_rx_queues; i++) {
3503 if (adapter->rx_scrq[i]) {
3504 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3505 crq_num);
3506 }
3507 }
3508
37798d02
NF		 3509 /* Insert vNIC login client data */
3510 vlcd = (struct vnic_login_client_data *)
3511 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3512 login_buffer->client_data_offset =
3513 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3514 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3515
3516 vnic_add_client_data(adapter, vlcd);
3517
032c5e82
TF		 3518 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3519 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3520 netdev_dbg(adapter->netdev, "%016lx\n",
3521 ((unsigned long int *)(adapter->login_buf))[i]);
3522 }
3523
3524 memset(&crq, 0, sizeof(crq));
3525 crq.login.first = IBMVNIC_CRQ_CMD;
3526 crq.login.cmd = LOGIN;
3527 crq.login.ioba = cpu_to_be32(buffer_token);
3528 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 3529 ibmvnic_send_crq(adapter, &crq);
3530
20a8ab74 3531 return 0;
032c5e82 3532
032c5e82
TF		 3533buf_rsp_map_failed:
3534 kfree(login_rsp_buffer);
3535buf_rsp_alloc_failed:
3536 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3537buf_map_failed:
3538 kfree(login_buffer);
3539buf_alloc_failed:
20a8ab74 3540 return -1;
032c5e82
TF		 3541}
3542
9c4eaabd
TF		 3543static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3544 u32 len, u8 map_id)
032c5e82
TF		 3545{
3546 union ibmvnic_crq crq;
3547
3548 memset(&crq, 0, sizeof(crq));
3549 crq.request_map.first = IBMVNIC_CRQ_CMD;
3550 crq.request_map.cmd = REQUEST_MAP;
3551 crq.request_map.map_id = map_id;
3552 crq.request_map.ioba = cpu_to_be32(addr);
3553 crq.request_map.len = cpu_to_be32(len);
9c4eaabd 3554 return ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 3555}
3556
9c4eaabd 3557static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
032c5e82
TF		 3558{
3559 union ibmvnic_crq crq;
3560
3561 memset(&crq, 0, sizeof(crq));
3562 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3563 crq.request_unmap.cmd = REQUEST_UNMAP;
3564 crq.request_unmap.map_id = map_id;
9c4eaabd 3565 return ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 3566}
3567
3568static void send_map_query(struct ibmvnic_adapter *adapter)
3569{
3570 union ibmvnic_crq crq;
3571
3572 memset(&crq, 0, sizeof(crq));
3573 crq.query_map.first = IBMVNIC_CRQ_CMD;
3574 crq.query_map.cmd = QUERY_MAP;
3575 ibmvnic_send_crq(adapter, &crq);
3576}
3577
3578/* Send a series of CRQs requesting various capabilities of the VNIC server */
3579static void send_cap_queries(struct ibmvnic_adapter *adapter)
3580{
3581 union ibmvnic_crq crq;
3582
901e040a 3583 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 3584 memset(&crq, 0, sizeof(crq));
3585 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3586 crq.query_capability.cmd = QUERY_CAPABILITY;
3587
3588 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 3589 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3590 ibmvnic_send_crq(adapter, &crq);
3591
3592 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 3593 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3594 ibmvnic_send_crq(adapter, &crq);
3595
3596 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 3597 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3598 ibmvnic_send_crq(adapter, &crq);
3599
3600 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 3601 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3602 ibmvnic_send_crq(adapter, &crq);
3603
3604 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 3605 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3606 ibmvnic_send_crq(adapter, &crq);
3607
3608 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 3609 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3610 ibmvnic_send_crq(adapter, &crq);
3611
3612 crq.query_capability.capability =
3613 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 3614 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3615 ibmvnic_send_crq(adapter, &crq);
3616
3617 crq.query_capability.capability =
3618 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3619 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3620 ibmvnic_send_crq(adapter, &crq);
3621
3622 crq.query_capability.capability =
3623 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 3624 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3625 ibmvnic_send_crq(adapter, &crq);
3626
3627 crq.query_capability.capability =
3628 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3629 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3630 ibmvnic_send_crq(adapter, &crq);
3631
3632 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 3633 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3634 ibmvnic_send_crq(adapter, &crq);
3635
3636 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 3637 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3638 ibmvnic_send_crq(adapter, &crq);
3639
3640 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 3641 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3642 ibmvnic_send_crq(adapter, &crq);
3643
3644 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 3645 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3646 ibmvnic_send_crq(adapter, &crq);
3647
3648 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 3649 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3650 ibmvnic_send_crq(adapter, &crq);
3651
3652 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 3653 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3654 ibmvnic_send_crq(adapter, &crq);
3655
6052d5e2
MFV		 3656 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3657 atomic_inc(&adapter->running_cap_crqs);
3658 ibmvnic_send_crq(adapter, &crq);
3659
032c5e82 3660 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 3661 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3662 ibmvnic_send_crq(adapter, &crq);
3663
3664 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 3665 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3666 ibmvnic_send_crq(adapter, &crq);
3667
3668 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 3669 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3670 ibmvnic_send_crq(adapter, &crq);
3671
3672 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 3673 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3674 ibmvnic_send_crq(adapter, &crq);
3675
3676 crq.query_capability.capability =
3677 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 3678 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3679 ibmvnic_send_crq(adapter, &crq);
3680
3681 crq.query_capability.capability =
3682 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 3683 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3684 ibmvnic_send_crq(adapter, &crq);
3685
3686 crq.query_capability.capability =
3687 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 3688 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3689 ibmvnic_send_crq(adapter, &crq);
3690
3691 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 3692 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3693 ibmvnic_send_crq(adapter, &crq);
3694}
3695
4e6759be
DANR		 3696static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3697 struct ibmvnic_adapter *adapter)
3698{
3699 struct device *dev = &adapter->vdev->dev;
3700
3701 if (crq->get_vpd_size_rsp.rc.code) {
3702 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3703 crq->get_vpd_size_rsp.rc.code);
3704 complete(&adapter->fw_done);
3705 return;
3706 }
3707
3708 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3709 complete(&adapter->fw_done);
3710}
3711
3712static void handle_vpd_rsp(union ibmvnic_crq *crq,
3713 struct ibmvnic_adapter *adapter)
3714{
3715 struct device *dev = &adapter->vdev->dev;
21a2545b 3716 unsigned char *substr = NULL;
4e6759be
DANR		 3717 u8 fw_level_len = 0;
3718
3719 memset(adapter->fw_version, 0, 32);
3720
3721 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3722 DMA_FROM_DEVICE);
3723
3724 if (crq->get_vpd_rsp.rc.code) {
3725 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3726 crq->get_vpd_rsp.rc.code);
3727 goto complete;
3728 }
3729
3730 /* get the position of the firmware version info
3731 * located after the ASCII 'RM' substring in the buffer
3732 */
3733 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3734 if (!substr) {
a107311d 3735 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4e6759be
DANR		 3736 goto complete;
3737 }
3738
3739 /* get length of firmware level ASCII substring */
3740 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3741 fw_level_len = *(substr + 2);
3742 } else {
3743 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3744 goto complete;
3745 }
3746
3747 /* copy firmware version string from vpd into adapter */
3748 if ((substr + 3 + fw_level_len) <
3749 (adapter->vpd->buff + adapter->vpd->len)) {
21a2545b 3750 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4e6759be
DANR		 3751 } else {
3752 dev_info(dev, "FW substr extrapolated VPD buff\n");
3753 }
3754
3755complete:
21a2545b
DANR		 3756 if (adapter->fw_version[0] == '\0')
3757 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4e6759be
DANR		 3758 complete(&adapter->fw_done);
3759}
3760
032c5e82
TF		 3761static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3762{
3763 struct device *dev = &adapter->vdev->dev;
3764 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3765 union ibmvnic_crq crq;
3766 int i;
3767
3768 dma_unmap_single(dev, adapter->ip_offload_tok,
3769 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3770
3771 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3772 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3773 netdev_dbg(adapter->netdev, "%016lx\n",
3774 ((unsigned long int *)(buf))[i]);
3775
3776 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3777 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3778 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3779 buf->tcp_ipv4_chksum);
3780 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3781 buf->tcp_ipv6_chksum);
3782 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3783 buf->udp_ipv4_chksum);
3784 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3785 buf->udp_ipv6_chksum);
3786 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3787 buf->large_tx_ipv4);
3788 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3789 buf->large_tx_ipv6);
3790 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3791 buf->large_rx_ipv4);
3792 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3793 buf->large_rx_ipv6);
3794 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3795 buf->max_ipv4_header_size);
3796 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3797 buf->max_ipv6_header_size);
3798 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3799 buf->max_tcp_header_size);
3800 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3801 buf->max_udp_header_size);
3802 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3803 buf->max_large_tx_size);
3804 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3805 buf->max_large_rx_size);
3806 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3807 buf->ipv6_extension_header);
3808 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3809 buf->tcp_pseudosum_req);
3810 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3811 buf->num_ipv6_ext_headers);
3812 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3813 buf->off_ipv6_ext_headers);
3814
3815 adapter->ip_offload_ctrl_tok =
3816 dma_map_single(dev, &adapter->ip_offload_ctrl,
3817 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3818
3819 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3820 dev_err(dev, "Couldn't map ip offload control buffer\n");
3821 return;
3822 }
3823
f6897943
TF		 3824 adapter->ip_offload_ctrl.len =
3825 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
032c5e82 3826 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
f6897943
TF		 3827 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3828 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
032c5e82
TF		 3829 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3830 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3831 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3832 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
fdb06105
TF		 3833 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3834 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
032c5e82 3835
fdb06105 3836 /* large_rx disabled for now, additional features needed */
032c5e82
TF		 3837 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3838 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3839
15482056 3840 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
032c5e82
TF		 3841
3842 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3843 adapter->netdev->features |= NETIF_F_IP_CSUM;
3844
3845 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3846 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3847
9be02cdf
TF		 3848 if ((adapter->netdev->features &
3849 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3850 adapter->netdev->features |= NETIF_F_RXCSUM;
3851
fdb06105
TF		 3852 if (buf->large_tx_ipv4)
3853 adapter->netdev->features |= NETIF_F_TSO;
3854 if (buf->large_tx_ipv6)
3855 adapter->netdev->features |= NETIF_F_TSO6;
3856
aa0bf851
TF		 3857 adapter->netdev->hw_features |= adapter->netdev->features;
3858
032c5e82
TF		 3859 memset(&crq, 0, sizeof(crq));
3860 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3861 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3862 crq.control_ip_offload.len =
3863 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3864 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3865 ibmvnic_send_crq(adapter, &crq);
3866}
3867
c9008d33
TF		 3868static const char *ibmvnic_fw_err_cause(u16 cause)
3869{
3870 switch (cause) {
3871 case ADAPTER_PROBLEM:
3872 return "adapter problem";
3873 case BUS_PROBLEM:
3874 return "bus problem";
3875 case FW_PROBLEM:
3876 return "firmware problem";
3877 case DD_PROBLEM:
3878 return "device driver problem";
3879 case EEH_RECOVERY:
3880 return "EEH recovery";
3881 case FW_UPDATED:
3882 return "firmware updated";
3883 case LOW_MEMORY:
3884 return "low Memory";
3885 default:
3886 return "unknown";
3887 }
3888}
3889
2f9de9ba
NF		 3890static void handle_error_indication(union ibmvnic_crq *crq,
3891 struct ibmvnic_adapter *adapter)
3892{
3893 struct device *dev = &adapter->vdev->dev;
c9008d33
TF		 3894 u16 cause;
3895
3896 cause = be16_to_cpu(crq->error_indication.error_cause);
2f9de9ba 3897
c9008d33
TF		 3898 dev_warn_ratelimited(dev,
3899 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3900 crq->error_indication.flags
3901 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3902 ibmvnic_fw_err_cause(cause));
2f9de9ba 3903
ed651a10
NF		 3904 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3905 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 3906 else
3907 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 3908}
3909
f813614f
TF		 3910static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3911 struct ibmvnic_adapter *adapter)
032c5e82
TF		 3912{
3913 struct net_device *netdev = adapter->netdev;
3914 struct device *dev = &adapter->vdev->dev;
3915 long rc;
3916
3917 rc = crq->change_mac_addr_rsp.rc.code;
3918 if (rc) {
3919 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
f813614f 3920 goto out;
032c5e82
TF		 3921 }
3922 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3923 ETH_ALEN);
f813614f
TF		 3924out:
3925 complete(&adapter->fw_done);
3926 return rc;
032c5e82
TF		 3927}
3928
3929static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3930 struct ibmvnic_adapter *adapter)
3931{
3932 struct device *dev = &adapter->vdev->dev;
3933 u64 *req_value;
3934 char *name;
3935
901e040a 3936 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 3937 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3938 case REQ_TX_QUEUES:
3939 req_value = &adapter->req_tx_queues;
3940 name = "tx";
3941 break;
3942 case REQ_RX_QUEUES:
3943 req_value = &adapter->req_rx_queues;
3944 name = "rx";
3945 break;
3946 case REQ_RX_ADD_QUEUES:
3947 req_value = &adapter->req_rx_add_queues;
3948 name = "rx_add";
3949 break;
3950 case REQ_TX_ENTRIES_PER_SUBCRQ:
3951 req_value = &adapter->req_tx_entries_per_subcrq;
3952 name = "tx_entries_per_subcrq";
3953 break;
3954 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3955 req_value = &adapter->req_rx_add_entries_per_subcrq;
3956 name = "rx_add_entries_per_subcrq";
3957 break;
3958 case REQ_MTU:
3959 req_value = &adapter->req_mtu;
3960 name = "mtu";
3961 break;
3962 case PROMISC_REQUESTED:
3963 req_value = &adapter->promisc;
3964 name = "promisc";
3965 break;
3966 default:
3967 dev_err(dev, "Got invalid cap request rsp %d\n",
3968 crq->request_capability.capability);
3969 return;
3970 }
3971
3972 switch (crq->request_capability_rsp.rc.code) {
3973 case SUCCESS:
3974 break;
3975 case PARTIALSUCCESS:
3976 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3977 *req_value,
28f4d165 3978 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 3979 number), name);
e7913803
JA		 3980
3981 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3982 REQ_MTU) {
3983 pr_err("mtu of %llu is not supported. Reverting.\n",
3984 *req_value);
3985 *req_value = adapter->fallback.mtu;
3986 } else {
3987 *req_value =
3988 be64_to_cpu(crq->request_capability_rsp.number);
3989 }
3990
d346b9bc 3991 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 3992 return;
3993 default:
3994 dev_err(dev, "Error %d in request cap rsp\n",
3995 crq->request_capability_rsp.rc.code);
3996 return;
3997 }
3998
3999 /* Done receiving requested capabilities, query IP offload support */
901e040a 4000 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 4001 union ibmvnic_crq newcrq;
4002 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4003 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4004 &adapter->ip_offload_buf;
4005
249168ad 4006 adapter->wait_capability = false;
032c5e82
TF		 4007 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4008 buf_sz,
4009 DMA_FROM_DEVICE);
4010
4011 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4012 if (!firmware_has_feature(FW_FEATURE_CMO))
4013 dev_err(dev, "Couldn't map offload buffer\n");
4014 return;
4015 }
4016
4017 memset(&newcrq, 0, sizeof(newcrq));
4018 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4019 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4020 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4021 newcrq.query_ip_offload.ioba =
4022 cpu_to_be32(adapter->ip_offload_tok);
4023
4024 ibmvnic_send_crq(adapter, &newcrq);
4025 }
4026}
4027
4028static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4029 struct ibmvnic_adapter *adapter)
4030{
4031 struct device *dev = &adapter->vdev->dev;
c26eba03 4032 struct net_device *netdev = adapter->netdev;
032c5e82
TF		 4033 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4034 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 4035 int i;
4036
4037 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
37e40fa8 4038 DMA_TO_DEVICE);
032c5e82 4039 dma_unmap_single(dev, adapter->login_rsp_buf_token,
37e40fa8 4040 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
032c5e82 4041
498cd8e4
JA		 4042 /* If the number of queues requested can't be allocated by the
4043 * server, the login response will return with code 1. We will need
4044 * to resend the login buffer with fewer queues requested.
4045 */
4046 if (login_rsp_crq->generic.rc.code) {
64d92aa2 4047 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
498cd8e4
JA		 4048 complete(&adapter->init_done);
4049 return 0;
4050 }
4051
c26eba03
JA		 4052 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4053
032c5e82
TF		 4054 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4055 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4056 netdev_dbg(adapter->netdev, "%016lx\n",
4057 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4058 }
4059
4060 /* Sanity checks */
4061 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4062 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4063 adapter->req_rx_add_queues !=
4064 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4065 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4066 ibmvnic_remove(adapter->vdev);
4067 return -EIO;
4068 }
a2c0f039 4069 release_login_buffer(adapter);
032c5e82
TF		 4070 complete(&adapter->init_done);
4071
032c5e82
TF		 4072 return 0;
4073}
4074
032c5e82
TF		 4075static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4076 struct ibmvnic_adapter *adapter)
4077{
4078 struct device *dev = &adapter->vdev->dev;
4079 long rc;
4080
4081 rc = crq->request_unmap_rsp.rc.code;
4082 if (rc)
4083 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4084}
4085
4086static void handle_query_map_rsp(union ibmvnic_crq *crq,
4087 struct ibmvnic_adapter *adapter)
4088{
4089 struct net_device *netdev = adapter->netdev;
4090 struct device *dev = &adapter->vdev->dev;
4091 long rc;
4092
4093 rc = crq->query_map_rsp.rc.code;
4094 if (rc) {
4095 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4096 return;
4097 }
4098 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4099 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4100 crq->query_map_rsp.free_pages);
4101}
4102
4103static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4104 struct ibmvnic_adapter *adapter)
4105{
4106 struct net_device *netdev = adapter->netdev;
4107 struct device *dev = &adapter->vdev->dev;
4108 long rc;
4109
901e040a 4110 atomic_dec(&adapter->running_cap_crqs);
032c5e82 4111 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 4112 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 4113 rc = crq->query_capability.rc.code;
4114 if (rc) {
4115 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4116 goto out;
4117 }
4118
4119 switch (be16_to_cpu(crq->query_capability.capability)) {
4120 case MIN_TX_QUEUES:
4121 adapter->min_tx_queues =
de89e854 4122 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4123 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4124 adapter->min_tx_queues);
4125 break;
4126 case MIN_RX_QUEUES:
4127 adapter->min_rx_queues =
de89e854 4128 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4129 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4130 adapter->min_rx_queues);
4131 break;
4132 case MIN_RX_ADD_QUEUES:
4133 adapter->min_rx_add_queues =
de89e854 4134 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4135 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4136 adapter->min_rx_add_queues);
4137 break;
4138 case MAX_TX_QUEUES:
4139 adapter->max_tx_queues =
de89e854 4140 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4141 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4142 adapter->max_tx_queues);
4143 break;
4144 case MAX_RX_QUEUES:
4145 adapter->max_rx_queues =
de89e854 4146 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4147 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4148 adapter->max_rx_queues);
4149 break;
4150 case MAX_RX_ADD_QUEUES:
4151 adapter->max_rx_add_queues =
de89e854 4152 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4153 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4154 adapter->max_rx_add_queues);
4155 break;
4156 case MIN_TX_ENTRIES_PER_SUBCRQ:
4157 adapter->min_tx_entries_per_subcrq =
de89e854 4158 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4159 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4160 adapter->min_tx_entries_per_subcrq);
4161 break;
4162 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4163 adapter->min_rx_add_entries_per_subcrq =
de89e854 4164 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4165 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4166 adapter->min_rx_add_entries_per_subcrq);
4167 break;
4168 case MAX_TX_ENTRIES_PER_SUBCRQ:
4169 adapter->max_tx_entries_per_subcrq =
de89e854 4170 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4171 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4172 adapter->max_tx_entries_per_subcrq);
4173 break;
4174 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4175 adapter->max_rx_add_entries_per_subcrq =
de89e854 4176 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4177 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4178 adapter->max_rx_add_entries_per_subcrq);
4179 break;
4180 case TCP_IP_OFFLOAD:
4181 adapter->tcp_ip_offload =
de89e854 4182 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4183 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4184 adapter->tcp_ip_offload);
4185 break;
4186 case PROMISC_SUPPORTED:
4187 adapter->promisc_supported =
de89e854 4188 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4189 netdev_dbg(netdev, "promisc_supported = %lld\n",
4190 adapter->promisc_supported);
4191 break;
4192 case MIN_MTU:
de89e854 4193 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 4194 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 4195 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4196 break;
4197 case MAX_MTU:
de89e854 4198 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 4199 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 4200 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4201 break;
4202 case MAX_MULTICAST_FILTERS:
4203 adapter->max_multicast_filters =
de89e854 4204 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4205 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4206 adapter->max_multicast_filters);
4207 break;
4208 case VLAN_HEADER_INSERTION:
4209 adapter->vlan_header_insertion =
de89e854 4210 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4211 if (adapter->vlan_header_insertion)
4212 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4213 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4214 adapter->vlan_header_insertion);
4215 break;
6052d5e2
MFV		 4216 case RX_VLAN_HEADER_INSERTION:
4217 adapter->rx_vlan_header_insertion =
4218 be64_to_cpu(crq->query_capability.number);
4219 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4220 adapter->rx_vlan_header_insertion);
4221 break;
032c5e82
TF		 4222 case MAX_TX_SG_ENTRIES:
4223 adapter->max_tx_sg_entries =
de89e854 4224 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4225 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4226 adapter->max_tx_sg_entries);
4227 break;
4228 case RX_SG_SUPPORTED:
4229 adapter->rx_sg_supported =
de89e854 4230 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4231 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4232 adapter->rx_sg_supported);
4233 break;
4234 case OPT_TX_COMP_SUB_QUEUES:
4235 adapter->opt_tx_comp_sub_queues =
de89e854 4236 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4237 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4238 adapter->opt_tx_comp_sub_queues);
4239 break;
4240 case OPT_RX_COMP_QUEUES:
4241 adapter->opt_rx_comp_queues =
de89e854 4242 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4243 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4244 adapter->opt_rx_comp_queues);
4245 break;
4246 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4247 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 4248 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4249 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4250 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4251 break;
4252 case OPT_TX_ENTRIES_PER_SUBCRQ:
4253 adapter->opt_tx_entries_per_subcrq =
de89e854 4254 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4255 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4256 adapter->opt_tx_entries_per_subcrq);
4257 break;
4258 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4259 adapter->opt_rxba_entries_per_subcrq =
de89e854 4260 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4261 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4262 adapter->opt_rxba_entries_per_subcrq);
4263 break;
4264 case TX_RX_DESC_REQ:
4265 adapter->tx_rx_desc_req = crq->query_capability.number;
4266 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4267 adapter->tx_rx_desc_req);
4268 break;
4269
4270 default:
4271 netdev_err(netdev, "Got invalid cap rsp %d\n",
4272 crq->query_capability.capability);
4273 }
4274
4275out:
249168ad
TF		 4276 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4277 adapter->wait_capability = false;
d346b9bc 4278 ibmvnic_send_req_caps(adapter, 0);
249168ad 4279 }
032c5e82
TF		 4280}
4281
032c5e82
TF		 4282static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4283 struct ibmvnic_adapter *adapter)
4284{
4285 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4286 struct net_device *netdev = adapter->netdev;
4287 struct device *dev = &adapter->vdev->dev;
993a82b0 4288 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 4289 long rc;
4290
4291 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 4292 (unsigned long int)cpu_to_be64(u64_crq[0]),
4293 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 4294 switch (gen_crq->first) {
4295 case IBMVNIC_CRQ_INIT_RSP:
4296 switch (gen_crq->cmd) {
4297 case IBMVNIC_CRQ_INIT:
4298 dev_info(dev, "Partner initialized\n");
017892c1 4299 adapter->from_passive_init = true;
5a18e1e0 4300 adapter->failover_pending = false;
17c87058
TF		 4301 if (!completion_done(&adapter->init_done)) {
4302 complete(&adapter->init_done);
4303 adapter->init_done_rc = -EIO;
4304 }
5a18e1e0 4305 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 4306 break;
4307 case IBMVNIC_CRQ_INIT_COMPLETE:
4308 dev_info(dev, "Partner initialization complete\n");
5153698e 4309 adapter->crq.active = true;
032c5e82
TF		 4310 send_version_xchg(adapter);
4311 break;
4312 default:
4313 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4314 }
4315 return;
4316 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 4317 netif_carrier_off(netdev);
5153698e 4318 adapter->crq.active = false;
2770a798
TF		 4319 if (adapter->resetting)
4320 adapter->force_reset_recovery = true;
032c5e82 4321 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 4322 dev_info(dev, "Migrated, re-enabling adapter\n");
4323 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 4324 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4325 dev_info(dev, "Backing device failover detected\n");
5a18e1e0 4326 adapter->failover_pending = true;
032c5e82
TF		 4327 } else {
4328 /* The adapter lost the connection */
4329 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4330 gen_crq->cmd);
ed651a10 4331 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 4332 }
4333 return;
4334 case IBMVNIC_CRQ_CMD_RSP:
4335 break;
4336 default:
4337 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4338 gen_crq->first);
4339 return;
4340 }
4341
4342 switch (gen_crq->cmd) {
4343 case VERSION_EXCHANGE_RSP:
4344 rc = crq->version_exchange_rsp.rc.code;
4345 if (rc) {
4346 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4347 break;
4348 }
4349 dev_info(dev, "Partner protocol version is %d\n",
4350 crq->version_exchange_rsp.version);
4351 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4352 ibmvnic_version)
4353 ibmvnic_version =
4354 be16_to_cpu(crq->version_exchange_rsp.version);
4355 send_cap_queries(adapter);
4356 break;
4357 case QUERY_CAPABILITY_RSP:
4358 handle_query_cap_rsp(crq, adapter);
4359 break;
4360 case QUERY_MAP_RSP:
4361 handle_query_map_rsp(crq, adapter);
4362 break;
4363 case REQUEST_MAP_RSP:
f3be0cbc
TF		 4364 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4365 complete(&adapter->fw_done);
032c5e82
TF		 4366 break;
4367 case REQUEST_UNMAP_RSP:
4368 handle_request_unmap_rsp(crq, adapter);
4369 break;
4370 case REQUEST_CAPABILITY_RSP:
4371 handle_request_cap_rsp(crq, adapter);
4372 break;
4373 case LOGIN_RSP:
4374 netdev_dbg(netdev, "Got Login Response\n");
4375 handle_login_rsp(crq, adapter);
4376 break;
4377 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 4378 netdev_dbg(netdev,
4379 "Got Logical Link State Response, state: %d rc: %d\n",
4380 crq->logical_link_state_rsp.link_state,
4381 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 4382 adapter->logical_link_state =
4383 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 4384 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4385 complete(&adapter->init_done);
032c5e82
TF		 4386 break;
4387 case LINK_STATE_INDICATION:
4388 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4389 adapter->phys_link_state =
4390 crq->link_state_indication.phys_link_state;
4391 adapter->logical_link_state =
4392 crq->link_state_indication.logical_link_state;
4393 break;
4394 case CHANGE_MAC_ADDR_RSP:
4395 netdev_dbg(netdev, "Got MAC address change Response\n");
f813614f 4396 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
032c5e82
TF		 4397 break;
4398 case ERROR_INDICATION:
4399 netdev_dbg(netdev, "Got Error Indication\n");
4400 handle_error_indication(crq, adapter);
4401 break;
032c5e82
TF		 4402 case REQUEST_STATISTICS_RSP:
4403 netdev_dbg(netdev, "Got Statistics Response\n");
4404 complete(&adapter->stats_done);
4405 break;
032c5e82
TF		 4406 case QUERY_IP_OFFLOAD_RSP:
4407 netdev_dbg(netdev, "Got Query IP offload Response\n");
4408 handle_query_ip_offload_rsp(adapter);
4409 break;
4410 case MULTICAST_CTRL_RSP:
4411 netdev_dbg(netdev, "Got multicast control Response\n");
4412 break;
4413 case CONTROL_IP_OFFLOAD_RSP:
4414 netdev_dbg(netdev, "Got Control IP offload Response\n");
4415 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4416 sizeof(adapter->ip_offload_ctrl),
4417 DMA_TO_DEVICE);
bd0b6723 4418 complete(&adapter->init_done);
032c5e82 4419 break;
032c5e82
TF		 4420 case COLLECT_FW_TRACE_RSP:
4421 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4422 complete(&adapter->fw_done);
4423 break;
4e6759be
DANR		 4424 case GET_VPD_SIZE_RSP:
4425 handle_vpd_size_rsp(crq, adapter);
4426 break;
4427 case GET_VPD_RSP:
4428 handle_vpd_rsp(crq, adapter);
4429 break;
032c5e82
TF		 4430 default:
4431 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4432 gen_crq->cmd);
4433 }
4434}
4435
4436static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4437{
4438 struct ibmvnic_adapter *adapter = instance;
6c267b3d 4439
6c267b3d 4440 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 4441 return IRQ_HANDLED;
4442}
4443
4444static void ibmvnic_tasklet(void *data)
4445{
4446 struct ibmvnic_adapter *adapter = data;
032c5e82 4447 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 4448 union ibmvnic_crq *crq;
4449 unsigned long flags;
4450 bool done = false;
4451
4452 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 4453 while (!done) {
4454 /* Pull all the valid messages off the CRQ */
4455 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4456 ibmvnic_handle_crq(crq, adapter);
4457 crq->generic.first = 0;
4458 }
ed7ecbf7
BK		 4459
4460 /* remain in tasklet until all
4461 * capabilities responses are received
4462 */
4463 if (!adapter->wait_capability)
4464 done = true;
032c5e82 4465 }
249168ad
TF		 4466 /* if capabilities CRQ's were sent in this tasklet, the following
4467 * tasklet must wait until all responses are received
4468 */
4469 if (atomic_read(&adapter->running_cap_crqs) != 0)
4470 adapter->wait_capability = true;
032c5e82 4471 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 4472}
4473
4474static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4475{
4476 struct vio_dev *vdev = adapter->vdev;
4477 int rc;
4478
4479 do {
4480 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4481 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4482
4483 if (rc)
4484 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4485
4486 return rc;
4487}
4488
4489static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4490{
4491 struct ibmvnic_crq_queue *crq = &adapter->crq;
4492 struct device *dev = &adapter->vdev->dev;
4493 struct vio_dev *vdev = adapter->vdev;
4494 int rc;
4495
4496 /* Close the CRQ */
4497 do {
4498 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4499 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4500
4501 /* Clean out the queue */
4502 memset(crq->msgs, 0, PAGE_SIZE);
4503 crq->cur = 0;
5153698e 4504 crq->active = false;
032c5e82
TF		 4505
4506 /* And re-open it again */
4507 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4508 crq->msg_token, PAGE_SIZE);
4509
4510 if (rc == H_CLOSED)
4511 /* Adapter is good, but other end is not ready */
4512 dev_warn(dev, "Partner adapter not ready\n");
4513 else if (rc != 0)
4514 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4515
4516 return rc;
4517}
4518
f992887c 4519static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4520{
4521 struct ibmvnic_crq_queue *crq = &adapter->crq;
4522 struct vio_dev *vdev = adapter->vdev;
4523 long rc;
4524
f992887c
NF		 4525 if (!crq->msgs)
4526 return;
4527
032c5e82
TF		 4528 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4529 free_irq(vdev->irq, adapter);
6c267b3d 4530 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4531 do {
4532 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4533 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4534
4535 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4536 DMA_BIDIRECTIONAL);
4537 free_page((unsigned long)crq->msgs);
f992887c 4538 crq->msgs = NULL;
5153698e 4539 crq->active = false;
032c5e82
TF		 4540}
4541
f992887c 4542static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4543{
4544 struct ibmvnic_crq_queue *crq = &adapter->crq;
4545 struct device *dev = &adapter->vdev->dev;
4546 struct vio_dev *vdev = adapter->vdev;
4547 int rc, retrc = -ENOMEM;
4548
f992887c
NF		 4549 if (crq->msgs)
4550 return 0;
4551
032c5e82
TF		 4552 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4553 /* Should we allocate more than one page? */
4554
4555 if (!crq->msgs)
4556 return -ENOMEM;
4557
4558 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4559 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4560 DMA_BIDIRECTIONAL);
4561 if (dma_mapping_error(dev, crq->msg_token))
4562 goto map_failed;
4563
4564 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4565 crq->msg_token, PAGE_SIZE);
4566
4567 if (rc == H_RESOURCE)
4568 /* maybe kexecing and resource is busy. try a reset */
4569 rc = ibmvnic_reset_crq(adapter);
4570 retrc = rc;
4571
4572 if (rc == H_CLOSED) {
4573 dev_warn(dev, "Partner adapter not ready\n");
4574 } else if (rc) {
4575 dev_warn(dev, "Error %d opening adapter\n", rc);
4576 goto reg_crq_failed;
4577 }
4578
4579 retrc = 0;
4580
6c267b3d
TF		 4581 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4582 (unsigned long)adapter);
4583
032c5e82
TF		 4584 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4585 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4586 adapter);
4587 if (rc) {
4588 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4589 vdev->irq, rc);
4590 goto req_irq_failed;
4591 }
4592
4593 rc = vio_enable_interrupts(vdev);
4594 if (rc) {
4595 dev_err(dev, "Error %d enabling interrupts\n", rc);
4596 goto req_irq_failed;
4597 }
4598
4599 crq->cur = 0;
4600 spin_lock_init(&crq->lock);
4601
4602 return retrc;
4603
4604req_irq_failed:
6c267b3d 4605 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4606 do {
4607 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4608 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4609reg_crq_failed:
4610 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4611map_failed:
4612 free_page((unsigned long)crq->msgs);
f992887c 4613 crq->msgs = NULL;
032c5e82
TF		 4614 return retrc;
4615}
4616
8a348450 4617static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
032c5e82 4618{
f6ef6408 4619 struct device *dev = &adapter->vdev->dev;
ea22d51a 4620 unsigned long timeout = msecs_to_jiffies(30000);
d7c0ef36 4621 u64 old_num_rx_queues, old_num_tx_queues;
f6ef6408
JA		 4622 int rc;
4623
017892c1
JA		 4624 adapter->from_passive_init = false;
4625
d7c0ef36
NF		 4626 old_num_rx_queues = adapter->req_rx_queues;
4627 old_num_tx_queues = adapter->req_tx_queues;
4628
f6ef6408 4629 init_completion(&adapter->init_done);
6a2fb0e9 4630 adapter->init_done_rc = 0;
f6ef6408
JA		 4631 ibmvnic_send_crq_init(adapter);
4632 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4633 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 4634 return -1;
4635 }
4636
6a2fb0e9
NF		 4637 if (adapter->init_done_rc) {
4638 release_crq_queue(adapter);
4639 return adapter->init_done_rc;
4640 }
4641
017892c1
JA		 4642 if (adapter->from_passive_init) {
4643 adapter->state = VNIC_OPEN;
4644 adapter->from_passive_init = false;
f6ef6408
JA		 4645 return -1;
4646 }
4647
30f79625
NF		 4648 if (adapter->resetting && !adapter->wait_for_reset &&
4649 adapter->reset_reason != VNIC_RESET_MOBILITY) {
d7c0ef36
NF		 4650 if (adapter->req_rx_queues != old_num_rx_queues ||
4651 adapter->req_tx_queues != old_num_tx_queues) {
4652 release_sub_crqs(adapter, 0);
4653 rc = init_sub_crqs(adapter);
4654 } else {
4655 rc = reset_sub_crq_queues(adapter);
4656 }
4657 } else {
57a49436 4658 rc = init_sub_crqs(adapter);
d7c0ef36
NF		 4659 }
4660
1bb3c739
NF		 4661 if (rc) {
4662 dev_err(dev, "Initialization of sub crqs failed\n");
4663 release_crq_queue(adapter);
5df969c3
TF		 4664 return rc;
4665 }
4666
4667 rc = init_sub_crq_irqs(adapter);
4668 if (rc) {
4669 dev_err(dev, "Failed to initialize sub crq irqs\n");
4670 release_crq_queue(adapter);
1bb3c739
NF		 4671 }
4672
4673 return rc;
f6ef6408
JA		 4674}
4675
8a348450
TF		 4676static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4677{
4678 struct device *dev = &adapter->vdev->dev;
4679 unsigned long timeout = msecs_to_jiffies(30000);
4680 int rc;
4681
4682 adapter->from_passive_init = false;
4683
4684 init_completion(&adapter->init_done);
4685 adapter->init_done_rc = 0;
4686 ibmvnic_send_crq_init(adapter);
4687 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4688 dev_err(dev, "Initialization sequence timed out\n");
4689 return -1;
4690 }
4691
4692 if (adapter->init_done_rc) {
4693 release_crq_queue(adapter);
4694 return adapter->init_done_rc;
4695 }
4696
4697 if (adapter->from_passive_init) {
4698 adapter->state = VNIC_OPEN;
4699 adapter->from_passive_init = false;
4700 return -1;
4701 }
4702
4703 rc = init_sub_crqs(adapter);
4704 if (rc) {
4705 dev_err(dev, "Initialization of sub crqs failed\n");
4706 release_crq_queue(adapter);
4707 return rc;
4708 }
4709
4710 rc = init_sub_crq_irqs(adapter);
4711 if (rc) {
4712 dev_err(dev, "Failed to initialize sub crq irqs\n");
4713 release_crq_queue(adapter);
4714 }
4715
4716 return rc;
4717}
4718
40c9db8a
TF		 4719static struct device_attribute dev_attr_failover;
4720
f6ef6408
JA		 4721static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4722{
032c5e82
TF		 4723 struct ibmvnic_adapter *adapter;
4724 struct net_device *netdev;
4725 unsigned char *mac_addr_p;
032c5e82
TF		 4726 int rc;
4727
4728 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4729 dev->unit_address);
4730
4731 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4732 VETH_MAC_ADDR, NULL);
4733 if (!mac_addr_p) {
4734 dev_err(&dev->dev,
4735 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4736 __FILE__, __LINE__);
4737 return 0;
4738 }
4739
4740 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
d45cc3a4 4741 IBMVNIC_MAX_QUEUES);
032c5e82
TF		 4742 if (!netdev)
4743 return -ENOMEM;
4744
4745 adapter = netdev_priv(netdev);
90c8014c 4746 adapter->state = VNIC_PROBING;
032c5e82
TF		 4747 dev_set_drvdata(&dev->dev, netdev);
4748 adapter->vdev = dev;
4749 adapter->netdev = netdev;
4750
4751 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4752 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4753 netdev->irq = dev->irq;
4754 netdev->netdev_ops = &ibmvnic_netdev_ops;
4755 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4756 SET_NETDEV_DEV(netdev, &dev->dev);
4757
4758 spin_lock_init(&adapter->stats_lock);
4759
ed651a10
NF		 4760 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4761 INIT_LIST_HEAD(&adapter->rwi_list);
ed651a10
NF		 4762 mutex_init(&adapter->rwi_lock);
4763 adapter->resetting = false;
4764
c26eba03
JA		 4765 adapter->mac_change_pending = false;
4766
6a2fb0e9 4767 do {
30f79625
NF		 4768 rc = init_crq_queue(adapter);
4769 if (rc) {
4770 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4771 rc);
4772 goto ibmvnic_init_fail;
4773 }
4774
6a2fb0e9 4775 rc = ibmvnic_init(adapter);
7c1885ae
NF		 4776 if (rc && rc != EAGAIN)
4777 goto ibmvnic_init_fail;
6a2fb0e9 4778 } while (rc == EAGAIN);
032c5e82 4779
07184213
TF		 4780 rc = init_stats_buffers(adapter);
4781 if (rc)
4782 goto ibmvnic_init_fail;
4783
4784 rc = init_stats_token(adapter);
4785 if (rc)
4786 goto ibmvnic_stats_fail;
4787
f39f0d1e 4788 netdev->mtu = adapter->req_mtu - ETH_HLEN;
c26eba03
JA		 4789 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4790 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82 4791
40c9db8a 4792 rc = device_create_file(&dev->dev, &dev_attr_failover);
7c1885ae 4793 if (rc)
07184213 4794 goto ibmvnic_dev_file_err;
40c9db8a 4795
e876a8a7 4796 netif_carrier_off(netdev);
032c5e82
TF		 4797 rc = register_netdev(netdev);
4798 if (rc) {
4799 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
7c1885ae 4800 goto ibmvnic_register_fail;
032c5e82
TF		 4801 }
4802 dev_info(&dev->dev, "ibmvnic registered\n");
4803
90c8014c 4804 adapter->state = VNIC_PROBED;
c26eba03
JA		 4805
4806 adapter->wait_for_reset = false;
4807
032c5e82 4808 return 0;
7c1885ae
NF		 4809
4810ibmvnic_register_fail:
4811 device_remove_file(&dev->dev, &dev_attr_failover);
4812
07184213
TF		 4813ibmvnic_dev_file_err:
4814 release_stats_token(adapter);
4815
4816ibmvnic_stats_fail:
4817 release_stats_buffers(adapter);
4818
7c1885ae 4819ibmvnic_init_fail:
d7c0ef36 4820 release_sub_crqs(adapter, 1);
7c1885ae
NF		 4821 release_crq_queue(adapter);
4822 free_netdev(netdev);
4823
4824 return rc;
032c5e82
TF		 4825}
4826
4827static int ibmvnic_remove(struct vio_dev *dev)
4828{
4829 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 4830 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4831
90c8014c 4832 adapter->state = VNIC_REMOVING;
a5681e20
JK		 4833 rtnl_lock();
4834 unregister_netdevice(netdev);
37489055
NF		 4835
4836 release_resources(adapter);
d7c0ef36 4837 release_sub_crqs(adapter, 1);
37489055
NF		 4838 release_crq_queue(adapter);
4839
53cc7721
TF		 4840 release_stats_token(adapter);
4841 release_stats_buffers(adapter);
4842
90c8014c
NF		 4843 adapter->state = VNIC_REMOVED;
4844
a5681e20 4845 rtnl_unlock();
40c9db8a 4846 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 4847 free_netdev(netdev);
4848 dev_set_drvdata(&dev->dev, NULL);
4849
4850 return 0;
4851}
4852
40c9db8a
TF		 4853static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4854 const char *buf, size_t count)
4855{
4856 struct net_device *netdev = dev_get_drvdata(dev);
4857 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4858 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4859 __be64 session_token;
4860 long rc;
4861
4862 if (!sysfs_streq(buf, "1"))
4863 return -EINVAL;
4864
4865 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4866 H_GET_SESSION_TOKEN, 0, 0, 0);
4867 if (rc) {
4868 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4869 rc);
4870 return -EINVAL;
4871 }
4872
4873 session_token = (__be64)retbuf[0];
4874 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4875 be64_to_cpu(session_token));
4876 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4877 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4878 if (rc) {
4879 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4880 rc);
4881 return -EINVAL;
4882 }
4883
4884 return count;
4885}
4886
6cbaefb4 4887static DEVICE_ATTR_WO(failover);
40c9db8a 4888
032c5e82
TF		 4889static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4890{
4891 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4892 struct ibmvnic_adapter *adapter;
4893 struct iommu_table *tbl;
4894 unsigned long ret = 0;
4895 int i;
4896
4897 tbl = get_iommu_table_base(&vdev->dev);
4898
4899 /* netdev inits at probe time along with the structures we need below*/
4900 if (!netdev)
4901 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4902
4903 adapter = netdev_priv(netdev);
4904
4905 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 4906 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4907
4908 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4909 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4910
4911 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4912 i++)
4913 ret += adapter->rx_pool[i].size *
4914 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4915
4916 return ret;
4917}
4918
4919static int ibmvnic_resume(struct device *dev)
4920{
4921 struct net_device *netdev = dev_get_drvdata(dev);
4922 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4923
cb89ba24
JA		 4924 if (adapter->state != VNIC_OPEN)
4925 return 0;
4926
a248878d 4927 tasklet_schedule(&adapter->tasklet);
032c5e82
TF		 4928
4929 return 0;
4930}
4931
8c37bc67 4932static const struct vio_device_id ibmvnic_device_table[] = {
032c5e82
TF		 4933 {"network", "IBM,vnic"},
4934 {"", "" }
4935};
4936MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4937
4938static const struct dev_pm_ops ibmvnic_pm_ops = {
4939 .resume = ibmvnic_resume
4940};
4941
4942static struct vio_driver ibmvnic_driver = {
4943 .id_table = ibmvnic_device_table,
4944 .probe = ibmvnic_probe,
4945 .remove = ibmvnic_remove,
4946 .get_desired_dma = ibmvnic_get_desired_dma,
4947 .name = ibmvnic_driver_name,
4948 .pm = &ibmvnic_pm_ops,
4949};
4950
4951/* module functions */
4952static int __init ibmvnic_module_init(void)
4953{
4954 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4955 IBMVNIC_DRIVER_VERSION);
4956
4957 return vio_register_driver(&ibmvnic_driver);
4958}
4959
4960static void __exit ibmvnic_module_exit(void)
4961{
4962 vio_unregister_driver(&ibmvnic_driver);
4963}
4964
4965module_init(ibmvnic_module_init);
4966module_exit(ibmvnic_module_exit);
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