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Merge tag 'drm-misc-fixes-2019-02-07' of git://anongit.freedesktop.org/drm/drm-misc...
[linux-2.6-block.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
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++) {
390de194
WY		 776 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
777 netif_napi_del(&adapter->napi[i]);
86f669b2
NF		 778 }
779
780 kfree(adapter->napi);
781 adapter->napi = NULL;
82e3be32 782 adapter->num_active_rx_napi = 0;
c3f22415 783 adapter->napi_enabled = false;
86f669b2
NF		 784}
785
a57a5d25 786static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 787{
788 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 789 unsigned long timeout = msecs_to_jiffies(30000);
64d92aa2 790 int retry_count = 0;
eb110410 791 bool retry;
4d96f12a 792 int rc;
032c5e82 793
bd0b6723 794 do {
eb110410 795 retry = false;
64d92aa2
NF		 796 if (retry_count > IBMVNIC_MAX_QUEUES) {
797 netdev_warn(netdev, "Login attempts exceeded\n");
798 return -1;
799 }
800
801 adapter->init_done_rc = 0;
802 reinit_completion(&adapter->init_done);
803 rc = send_login(adapter);
804 if (rc) {
805 netdev_warn(netdev, "Unable to login\n");
806 return rc;
807 }
808
809 if (!wait_for_completion_timeout(&adapter->init_done,
810 timeout)) {
811 netdev_warn(netdev, "Login timed out\n");
812 return -1;
813 }
814
815 if (adapter->init_done_rc == PARTIALSUCCESS) {
816 retry_count++;
d7c0ef36 817 release_sub_crqs(adapter, 1);
bd0b6723 818
eb110410
TF		 819 retry = true;
820 netdev_dbg(netdev,
821 "Received partial success, retrying...\n");
64d92aa2 822 adapter->init_done_rc = 0;
bd0b6723
JA		 823 reinit_completion(&adapter->init_done);
824 send_cap_queries(adapter);
825 if (!wait_for_completion_timeout(&adapter->init_done,
826 timeout)) {
64d92aa2
NF		 827 netdev_warn(netdev,
828 "Capabilities query timed out\n");
bd0b6723
JA		 829 return -1;
830 }
64d92aa2 831
4d96f12a
TF		 832 rc = init_sub_crqs(adapter);
833 if (rc) {
64d92aa2
NF		 834 netdev_warn(netdev,
835 "SCRQ initialization failed\n");
4d96f12a
TF		 836 return -1;
837 }
64d92aa2 838
4d96f12a
TF		 839 rc = init_sub_crq_irqs(adapter);
840 if (rc) {
64d92aa2
NF		 841 netdev_warn(netdev,
842 "SCRQ irq initialization failed\n");
4d96f12a
TF		 843 return -1;
844 }
64d92aa2
NF		 845 } else if (adapter->init_done_rc) {
846 netdev_warn(netdev, "Adapter login failed\n");
bd0b6723
JA		 847 return -1;
848 }
eb110410 849 } while (retry);
bd0b6723 850
3d166130
TF		 851 /* handle pending MAC address changes after successful login */
852 if (adapter->mac_change_pending) {
853 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
854 adapter->mac_change_pending = false;
855 }
856
a57a5d25
JA		 857 return 0;
858}
859
34f0f4e3
TF		 860static void release_login_buffer(struct ibmvnic_adapter *adapter)
861{
862 kfree(adapter->login_buf);
863 adapter->login_buf = NULL;
864}
865
866static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
867{
868 kfree(adapter->login_rsp_buf);
869 adapter->login_rsp_buf = NULL;
870}
871
1b8955ee
NF		 872static void release_resources(struct ibmvnic_adapter *adapter)
873{
4e6759be
DANR		 874 release_vpd_data(adapter);
875
1b8955ee
NF		 876 release_tx_pools(adapter);
877 release_rx_pools(adapter);
878
86f669b2 879 release_napi(adapter);
34f0f4e3 880 release_login_rsp_buffer(adapter);
1b8955ee
NF		 881}
882
53da09e9
NF		 883static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
884{
885 struct net_device *netdev = adapter->netdev;
886 unsigned long timeout = msecs_to_jiffies(30000);
887 union ibmvnic_crq crq;
888 bool resend;
889 int rc;
890
d1cf33d9
NF		 891 netdev_dbg(netdev, "setting link state %d\n", link_state);
892
53da09e9
NF		 893 memset(&crq, 0, sizeof(crq));
894 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
895 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
896 crq.logical_link_state.link_state = link_state;
897
898 do {
899 resend = false;
900
901 reinit_completion(&adapter->init_done);
902 rc = ibmvnic_send_crq(adapter, &crq);
903 if (rc) {
904 netdev_err(netdev, "Failed to set link state\n");
905 return rc;
906 }
907
908 if (!wait_for_completion_timeout(&adapter->init_done,
909 timeout)) {
910 netdev_err(netdev, "timeout setting link state\n");
911 return -1;
912 }
913
914 if (adapter->init_done_rc == 1) {
915 /* Partuial success, delay and re-send */
916 mdelay(1000);
917 resend = true;
ab5ec33b
TF		 918 } else if (adapter->init_done_rc) {
919 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
920 adapter->init_done_rc);
921 return adapter->init_done_rc;
53da09e9
NF		 922 }
923 } while (resend);
924
925 return 0;
926}
927
7f3c6e6b
TF		 928static int set_real_num_queues(struct net_device *netdev)
929{
930 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
931 int rc;
932
d1cf33d9
NF		 933 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
934 adapter->req_tx_queues, adapter->req_rx_queues);
935
7f3c6e6b
TF		 936 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
937 if (rc) {
938 netdev_err(netdev, "failed to set the number of tx queues\n");
939 return rc;
940 }
941
942 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
943 if (rc)
944 netdev_err(netdev, "failed to set the number of rx queues\n");
945
946 return rc;
947}
948
4e6759be
DANR		 949static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
950{
951 struct device *dev = &adapter->vdev->dev;
952 union ibmvnic_crq crq;
4e6759be 953 int len = 0;
9c4eaabd 954 int rc;
4e6759be
DANR		 955
956 if (adapter->vpd->buff)
957 len = adapter->vpd->len;
958
69d08dcb 959 init_completion(&adapter->fw_done);
4e6759be
DANR		 960 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
961 crq.get_vpd_size.cmd = GET_VPD_SIZE;
9c4eaabd
TF		 962 rc = ibmvnic_send_crq(adapter, &crq);
963 if (rc)
964 return rc;
4e6759be
DANR		 965 wait_for_completion(&adapter->fw_done);
966
967 if (!adapter->vpd->len)
968 return -ENODATA;
969
970 if (!adapter->vpd->buff)
971 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
972 else if (adapter->vpd->len != len)
973 adapter->vpd->buff =
974 krealloc(adapter->vpd->buff,
975 adapter->vpd->len, GFP_KERNEL);
976
977 if (!adapter->vpd->buff) {
978 dev_err(dev, "Could allocate VPD buffer\n");
979 return -ENOMEM;
980 }
981
982 adapter->vpd->dma_addr =
983 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
984 DMA_FROM_DEVICE);
f743106e 985 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
4e6759be
DANR		 986 dev_err(dev, "Could not map VPD buffer\n");
987 kfree(adapter->vpd->buff);
b0992eca 988 adapter->vpd->buff = NULL;
4e6759be
DANR		 989 return -ENOMEM;
990 }
991
992 reinit_completion(&adapter->fw_done);
993 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
994 crq.get_vpd.cmd = GET_VPD;
995 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
996 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
9c4eaabd
TF		 997 rc = ibmvnic_send_crq(adapter, &crq);
998 if (rc) {
999 kfree(adapter->vpd->buff);
1000 adapter->vpd->buff = NULL;
1001 return rc;
1002 }
4e6759be
DANR		 1003 wait_for_completion(&adapter->fw_done);
1004
1005 return 0;
1006}
1007
bfc32f29 1008static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 1009{
bfc32f29 1010 struct net_device *netdev = adapter->netdev;
86f669b2 1011 int rc;
a57a5d25 1012
7f3c6e6b
TF		 1013 rc = set_real_num_queues(netdev);
1014 if (rc)
1015 return rc;
bd0b6723 1016
4e6759be
DANR		 1017 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1018 if (!adapter->vpd)
1019 return -ENOMEM;
1020
69d08dcb
JA		 1021 /* Vital Product Data (VPD) */
1022 rc = ibmvnic_get_vpd(adapter);
1023 if (rc) {
1024 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1025 return rc;
1026 }
1027
032c5e82 1028 adapter->map_id = 1;
bfc32f29 1029
86f669b2
NF		 1030 rc = init_napi(adapter);
1031 if (rc)
1032 return rc;
032c5e82 1033
032c5e82 1034 send_map_query(adapter);
0ffe2cb7
NF		 1035
1036 rc = init_rx_pools(netdev);
1037 if (rc)
bfc32f29 1038 return rc;
032c5e82 1039
c657e32c 1040 rc = init_tx_pools(netdev);
bfc32f29
NF		 1041 return rc;
1042}
1043
ed651a10 1044static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 1045{
1046 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 1047 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 1048 int i, rc;
1049
90c8014c 1050 adapter->state = VNIC_OPENING;
032c5e82 1051 replenish_pools(adapter);
d944c3d6 1052 ibmvnic_napi_enable(adapter);
bfc32f29 1053
032c5e82
TF		 1054 /* We're ready to receive frames, enable the sub-crq interrupts and
1055 * set the logical link state to up
1056 */
ed651a10 1057 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 1058 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
ed651a10
NF		 1059 if (prev_state == VNIC_CLOSED)
1060 enable_irq(adapter->rx_scrq[i]->irq);
f23e0643 1061 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
ed651a10 1062 }
032c5e82 1063
ed651a10 1064 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 1065 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
ed651a10
NF		 1066 if (prev_state == VNIC_CLOSED)
1067 enable_irq(adapter->tx_scrq[i]->irq);
f23e0643 1068 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
ed651a10 1069 }
032c5e82 1070
53da09e9 1071 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 1072 if (rc) {
1073 for (i = 0; i < adapter->req_rx_queues; i++)
1074 napi_disable(&adapter->napi[i]);
1075 release_resources(adapter);
ed651a10 1076 return rc;
bfc32f29 1077 }
032c5e82 1078
ed651a10
NF		 1079 netif_tx_start_all_queues(netdev);
1080
1081 if (prev_state == VNIC_CLOSED) {
1082 for (i = 0; i < adapter->req_rx_queues; i++)
1083 napi_schedule(&adapter->napi[i]);
1084 }
1085
1086 adapter->state = VNIC_OPEN;
1087 return rc;
1088}
1089
1090static int ibmvnic_open(struct net_device *netdev)
1091{
1092 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
69d08dcb 1093 int rc;
ed651a10 1094
5a18e1e0
TF		 1095 /* If device failover is pending, just set device state and return.
1096 * Device operation will be handled by reset routine.
1097 */
1098 if (adapter->failover_pending) {
1099 adapter->state = VNIC_OPEN;
1100 return 0;
1101 }
1102
ed651a10
NF		 1103 if (adapter->state != VNIC_CLOSED) {
1104 rc = ibmvnic_login(netdev);
a5681e20 1105 if (rc)
ed651a10 1106 return rc;
ed651a10
NF		 1107
1108 rc = init_resources(adapter);
1109 if (rc) {
1110 netdev_err(netdev, "failed to initialize resources\n");
1111 release_resources(adapter);
ed651a10
NF		 1112 return rc;
1113 }
1114 }
1115
1116 rc = __ibmvnic_open(netdev);
e876a8a7 1117 netif_carrier_on(netdev);
4e6759be 1118
bfc32f29 1119 return rc;
032c5e82
TF		 1120}
1121
d0869c00
TF		 1122static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1123{
1124 struct ibmvnic_rx_pool *rx_pool;
637f81d1 1125 struct ibmvnic_rx_buff *rx_buff;
d0869c00
TF		 1126 u64 rx_entries;
1127 int rx_scrqs;
1128 int i, j;
1129
1130 if (!adapter->rx_pool)
1131 return;
1132
660e309d 1133 rx_scrqs = adapter->num_active_rx_pools;
d0869c00
TF		 1134 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1135
1136 /* Free any remaining skbs in the rx buffer pools */
1137 for (i = 0; i < rx_scrqs; i++) {
1138 rx_pool = &adapter->rx_pool[i];
637f81d1 1139 if (!rx_pool || !rx_pool->rx_buff)
d0869c00
TF		 1140 continue;
1141
1142 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1143 for (j = 0; j < rx_entries; j++) {
637f81d1
TF		 1144 rx_buff = &rx_pool->rx_buff[j];
1145 if (rx_buff && rx_buff->skb) {
1146 dev_kfree_skb_any(rx_buff->skb);
1147 rx_buff->skb = NULL;
d0869c00
TF		 1148 }
1149 }
1150 }
1151}
1152
e9e1e978
TF		 1153static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1154 struct ibmvnic_tx_pool *tx_pool)
b41b83e9 1155{
637f81d1 1156 struct ibmvnic_tx_buff *tx_buff;
b41b83e9 1157 u64 tx_entries;
e9e1e978
TF		 1158 int i;
1159
050e85c9 1160 if (!tx_pool || !tx_pool->tx_buff)
e9e1e978
TF		 1161 return;
1162
1163 tx_entries = tx_pool->num_buffers;
1164
1165 for (i = 0; i < tx_entries; i++) {
1166 tx_buff = &tx_pool->tx_buff[i];
1167 if (tx_buff && tx_buff->skb) {
1168 dev_kfree_skb_any(tx_buff->skb);
1169 tx_buff->skb = NULL;
1170 }
1171 }
1172}
1173
1174static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1175{
b41b83e9 1176 int tx_scrqs;
e9e1e978 1177 int i;
b41b83e9 1178
e9e1e978 1179 if (!adapter->tx_pool || !adapter->tso_pool)
b41b83e9
NF		 1180 return;
1181
660e309d 1182 tx_scrqs = adapter->num_active_tx_pools;
b41b83e9
NF		 1183
1184 /* Free any remaining skbs in the tx buffer pools */
1185 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9 1186 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
e9e1e978
TF		 1187 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1188 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
b41b83e9
NF		 1189 }
1190}
1191
6095e590 1192static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
ea5509f5 1193{
6095e590 1194 struct net_device *netdev = adapter->netdev;
ea5509f5
JA		 1195 int i;
1196
46293b94
NF		 1197 if (adapter->tx_scrq) {
1198 for (i = 0; i < adapter->req_tx_queues; i++)
d1cf33d9 1199 if (adapter->tx_scrq[i]->irq) {
f873866a 1200 netdev_dbg(netdev,
d1cf33d9 1201 "Disabling tx_scrq[%d] irq\n", i);
f23e0643 1202 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
46293b94 1203 disable_irq(adapter->tx_scrq[i]->irq);
d1cf33d9 1204 }
46293b94
NF		 1205 }
1206
46293b94
NF		 1207 if (adapter->rx_scrq) {
1208 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 1209 if (adapter->rx_scrq[i]->irq) {
f873866a 1210 netdev_dbg(netdev,
d1cf33d9 1211 "Disabling rx_scrq[%d] irq\n", i);
f23e0643 1212 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
46293b94 1213 disable_irq(adapter->rx_scrq[i]->irq);
d1cf33d9 1214 }
46293b94
NF		 1215 }
1216 }
6095e590
JA		 1217}
1218
1219static void ibmvnic_cleanup(struct net_device *netdev)
1220{
1221 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1222
1223 /* ensure that transmissions are stopped if called by do_reset */
1224 if (adapter->resetting)
1225 netif_tx_disable(netdev);
1226 else
1227 netif_tx_stop_all_queues(netdev);
1228
1229 ibmvnic_napi_disable(adapter);
1230 ibmvnic_disable_irqs(adapter);
1231
d0869c00 1232 clean_rx_pools(adapter);
10f76215 1233 clean_tx_pools(adapter);
01d9bd79
TF		 1234}
1235
1236static int __ibmvnic_close(struct net_device *netdev)
1237{
1238 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1239 int rc = 0;
1240
1241 adapter->state = VNIC_CLOSING;
1242 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1243 if (rc)
1244 return rc;
90c8014c 1245 adapter->state = VNIC_CLOSED;
01d9bd79 1246 return 0;
032c5e82
TF		 1247}
1248
ed651a10
NF		 1249static int ibmvnic_close(struct net_device *netdev)
1250{
1251 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1252 int rc;
1253
5a18e1e0
TF		 1254 /* If device failover is pending, just set device state and return.
1255 * Device operation will be handled by reset routine.
1256 */
1257 if (adapter->failover_pending) {
1258 adapter->state = VNIC_CLOSED;
1259 return 0;
1260 }
1261
ed651a10 1262 rc = __ibmvnic_close(netdev);
30f79625 1263 ibmvnic_cleanup(netdev);
ed651a10
NF		 1264
1265 return rc;
1266}
1267
ad7775dc
TF		 1268/**
1269 * build_hdr_data - creates L2/L3/L4 header data buffer
1270 * @hdr_field - bitfield determining needed headers
1271 * @skb - socket buffer
1272 * @hdr_len - array of header lengths
1273 * @tot_len - total length of data
1274 *
1275 * Reads hdr_field to determine which headers are needed by firmware.
1276 * Builds a buffer containing these headers. Saves individual header
1277 * lengths and total buffer length to be used to build descriptors.
1278 */
1279static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1280 int *hdr_len, u8 *hdr_data)
1281{
1282 int len = 0;
1283 u8 *hdr;
1284
da75e3b6
TF		 1285 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1286 hdr_len[0] = sizeof(struct vlan_ethhdr);
1287 else
1288 hdr_len[0] = sizeof(struct ethhdr);
ad7775dc
TF		 1289
1290 if (skb->protocol == htons(ETH_P_IP)) {
1291 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1292 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1293 hdr_len[2] = tcp_hdrlen(skb);
1294 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1295 hdr_len[2] = sizeof(struct udphdr);
1296 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1297 hdr_len[1] = sizeof(struct ipv6hdr);
1298 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1299 hdr_len[2] = tcp_hdrlen(skb);
1300 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1301 hdr_len[2] = sizeof(struct udphdr);
4eb50ceb
TF		 1302 } else if (skb->protocol == htons(ETH_P_ARP)) {
1303 hdr_len[1] = arp_hdr_len(skb->dev);
1304 hdr_len[2] = 0;
ad7775dc
TF		 1305 }
1306
1307 memset(hdr_data, 0, 120);
1308 if ((hdr_field >> 6) & 1) {
1309 hdr = skb_mac_header(skb);
1310 memcpy(hdr_data, hdr, hdr_len[0]);
1311 len += hdr_len[0];
1312 }
1313
1314 if ((hdr_field >> 5) & 1) {
1315 hdr = skb_network_header(skb);
1316 memcpy(hdr_data + len, hdr, hdr_len[1]);
1317 len += hdr_len[1];
1318 }
1319
1320 if ((hdr_field >> 4) & 1) {
1321 hdr = skb_transport_header(skb);
1322 memcpy(hdr_data + len, hdr, hdr_len[2]);
1323 len += hdr_len[2];
1324 }
1325 return len;
1326}
1327
1328/**
1329 * create_hdr_descs - create header and header extension descriptors
1330 * @hdr_field - bitfield determining needed headers
1331 * @data - buffer containing header data
1332 * @len - length of data buffer
1333 * @hdr_len - array of individual header lengths
1334 * @scrq_arr - descriptor array
1335 *
1336 * Creates header and, if needed, header extension descriptors and
1337 * places them in a descriptor array, scrq_arr
1338 */
1339
2de09681
TF		 1340static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1341 union sub_crq *scrq_arr)
ad7775dc
TF		 1342{
1343 union sub_crq hdr_desc;
1344 int tmp_len = len;
2de09681 1345 int num_descs = 0;
ad7775dc
TF		 1346 u8 *data, *cur;
1347 int tmp;
1348
1349 while (tmp_len > 0) {
1350 cur = hdr_data + len - tmp_len;
1351
1352 memset(&hdr_desc, 0, sizeof(hdr_desc));
1353 if (cur != hdr_data) {
1354 data = hdr_desc.hdr_ext.data;
1355 tmp = tmp_len > 29 ? 29 : tmp_len;
1356 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1357 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1358 hdr_desc.hdr_ext.len = tmp;
1359 } else {
1360 data = hdr_desc.hdr.data;
1361 tmp = tmp_len > 24 ? 24 : tmp_len;
1362 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1363 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1364 hdr_desc.hdr.len = tmp;
1365 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1366 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1367 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1368 hdr_desc.hdr.flag = hdr_field << 1;
1369 }
1370 memcpy(data, cur, tmp);
1371 tmp_len -= tmp;
1372 *scrq_arr = hdr_desc;
1373 scrq_arr++;
2de09681 1374 num_descs++;
ad7775dc 1375 }
2de09681
TF		 1376
1377 return num_descs;
ad7775dc
TF		 1378}
1379
1380/**
1381 * build_hdr_descs_arr - build a header descriptor array
1382 * @skb - socket buffer
1383 * @num_entries - number of descriptors to be sent
1384 * @subcrq - first TX descriptor
1385 * @hdr_field - bit field determining which headers will be sent
1386 *
1387 * This function will build a TX descriptor array with applicable
1388 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1389 */
1390
1391static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1392 int *num_entries, u8 hdr_field)
1393{
1394 int hdr_len[3] = {0, 0, 0};
2de09681 1395 int tot_len;
ad7775dc
TF		 1396 u8 *hdr_data = txbuff->hdr_data;
1397
1398 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1399 txbuff->hdr_data);
2de09681 1400 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
ad7775dc
TF		 1401 txbuff->indir_arr + 1);
1402}
1403
1f247a6f
TF		 1404static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1405 struct net_device *netdev)
1406{
1407 /* For some backing devices, mishandling of small packets
1408 * can result in a loss of connection or TX stall. Device
1409 * architects recommend that no packet should be smaller
1410 * than the minimum MTU value provided to the driver, so
1411 * pad any packets to that length
1412 */
1413 if (skb->len < netdev->min_mtu)
1414 return skb_put_padto(skb, netdev->min_mtu);
7083a45a
TF		 1415
1416 return 0;
1f247a6f
TF		 1417}
1418
94b2bb28 1419static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
032c5e82
TF		 1420{
1421 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1422 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1423 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1424 struct device *dev = &adapter->vdev->dev;
1425 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1426 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1427 struct ibmvnic_tx_pool *tx_pool;
1428 unsigned int tx_send_failed = 0;
1429 unsigned int tx_map_failed = 0;
1430 unsigned int tx_dropped = 0;
1431 unsigned int tx_packets = 0;
1432 unsigned int tx_bytes = 0;
1433 dma_addr_t data_dma_addr;
1434 struct netdev_queue *txq;
032c5e82
TF		 1435 unsigned long lpar_rc;
1436 union sub_crq tx_crq;
1437 unsigned int offset;
ad7775dc 1438 int num_entries = 1;
032c5e82
TF		 1439 unsigned char *dst;
1440 u64 *handle_array;
1441 int index = 0;
a0dca10f 1442 u8 proto = 0;
94b2bb28 1443 netdev_tx_t ret = NETDEV_TX_OK;
032c5e82 1444
ed651a10 1445 if (adapter->resetting) {
7f5b0308
TF		 1446 if (!netif_subqueue_stopped(netdev, skb))
1447 netif_stop_subqueue(netdev, queue_num);
1448 dev_kfree_skb_any(skb);
1449
032c5e82
TF		 1450 tx_send_failed++;
1451 tx_dropped++;
7f5b0308 1452 ret = NETDEV_TX_OK;
032c5e82
TF		 1453 goto out;
1454 }
1455
7083a45a 1456 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1f247a6f
TF		 1457 tx_dropped++;
1458 tx_send_failed++;
1459 ret = NETDEV_TX_OK;
1460 goto out;
1461 }
06b3e357
TF		 1462 if (skb_is_gso(skb))
1463 tx_pool = &adapter->tso_pool[queue_num];
1464 else
1465 tx_pool = &adapter->tx_pool[queue_num];
1f247a6f 1466
161b8a81
NF		 1467 tx_scrq = adapter->tx_scrq[queue_num];
1468 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1469 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1470 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1471
032c5e82 1472 index = tx_pool->free_map[tx_pool->consumer_index];
fdb06105 1473
86b61a5f
TF		 1474 if (index == IBMVNIC_INVALID_MAP) {
1475 dev_kfree_skb_any(skb);
1476 tx_send_failed++;
1477 tx_dropped++;
1478 ret = NETDEV_TX_OK;
1479 goto out;
1480 }
1481
1482 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1483
06b3e357
TF		 1484 offset = index * tx_pool->buf_size;
1485 dst = tx_pool->long_term_buff.buff + offset;
1486 memset(dst, 0, tx_pool->buf_size);
1487 data_dma_addr = tx_pool->long_term_buff.addr + offset;
032c5e82 1488
15482056
TF		 1489 if (skb_shinfo(skb)->nr_frags) {
1490 int cur, i;
1491
1492 /* Copy the head */
1493 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1494 cur = skb_headlen(skb);
1495
1496 /* Copy the frags */
1497 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1498 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1499
1500 memcpy(dst + cur,
1501 page_address(skb_frag_page(frag)) +
1502 frag->page_offset, skb_frag_size(frag));
1503 cur += skb_frag_size(frag);
1504 }
1505 } else {
1506 skb_copy_from_linear_data(skb, dst, skb->len);
1507 }
1508
032c5e82 1509 tx_pool->consumer_index =
06b3e357 1510 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
032c5e82
TF		 1511
1512 tx_buff = &tx_pool->tx_buff[index];
1513 tx_buff->skb = skb;
1514 tx_buff->data_dma[0] = data_dma_addr;
1515 tx_buff->data_len[0] = skb->len;
1516 tx_buff->index = index;
1517 tx_buff->pool_index = queue_num;
1518 tx_buff->last_frag = true;
032c5e82
TF		 1519
1520 memset(&tx_crq, 0, sizeof(tx_crq));
1521 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1522 tx_crq.v1.type = IBMVNIC_TX_DESC;
1523 tx_crq.v1.n_crq_elem = 1;
1524 tx_crq.v1.n_sge = 1;
1525 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
06b3e357 1526
fdb06105 1527 if (skb_is_gso(skb))
06b3e357
TF		 1528 tx_crq.v1.correlator =
1529 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
fdb06105 1530 else
06b3e357
TF		 1531 tx_crq.v1.correlator = cpu_to_be32(index);
1532 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
032c5e82
TF		 1533 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1534 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1535
e84b4794 1536 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
032c5e82
TF		 1537 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1538 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1539 }
1540
1541 if (skb->protocol == htons(ETH_P_IP)) {
a0dca10f
TF		 1542 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1543 proto = ip_hdr(skb)->protocol;
1544 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1546 proto = ipv6_hdr(skb)->nexthdr;
032c5e82
TF		 1547 }
1548
a0dca10f
TF		 1549 if (proto == IPPROTO_TCP)
1550 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1551 else if (proto == IPPROTO_UDP)
1552 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1553
ad7775dc 1554 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1555 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1556 hdrs += 2;
1557 }
fdb06105
TF		 1558 if (skb_is_gso(skb)) {
1559 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1560 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1561 hdrs += 2;
1562 }
ad7775dc 1563 /* determine if l2/3/4 headers are sent to firmware */
2fa56a49 1564 if ((*hdrs >> 7) & 1) {
ad7775dc
TF		 1565 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1566 tx_crq.v1.n_crq_elem = num_entries;
ecba616e 1567 tx_buff->num_entries = num_entries;
ad7775dc
TF		 1568 tx_buff->indir_arr[0] = tx_crq;
1569 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1570 sizeof(tx_buff->indir_arr),
1571 DMA_TO_DEVICE);
1572 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1573 dev_kfree_skb_any(skb);
1574 tx_buff->skb = NULL;
ad7775dc
TF		 1575 if (!firmware_has_feature(FW_FEATURE_CMO))
1576 dev_err(dev, "tx: unable to map descriptor array\n");
1577 tx_map_failed++;
1578 tx_dropped++;
7f5b0308 1579 ret = NETDEV_TX_OK;
86b61a5f 1580 goto tx_err_out;
ad7775dc 1581 }
498cd8e4 1582 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1583 (u64)tx_buff->indir_dma,
1584 (u64)num_entries);
1585 } else {
ecba616e 1586 tx_buff->num_entries = num_entries;
498cd8e4
JA		 1587 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1588 &tx_crq);
ad7775dc 1589 }
032c5e82 1590 if (lpar_rc != H_SUCCESS) {
2d14d379
TF		 1591 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1592 dev_err_ratelimited(dev, "tx: send failed\n");
7f5b0308
TF		 1593 dev_kfree_skb_any(skb);
1594 tx_buff->skb = NULL;
1595
5a18e1e0
TF		 1596 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1597 /* Disable TX and report carrier off if queue is closed
1598 * or pending failover.
b8c80b84
TF		 1599 * Firmware guarantees that a signal will be sent to the
1600 * driver, triggering a reset or some other action.
1601 */
1602 netif_tx_stop_all_queues(netdev);
1603 netif_carrier_off(netdev);
1604 }
7f5b0308 1605
032c5e82
TF		 1606 tx_send_failed++;
1607 tx_dropped++;
7f5b0308 1608 ret = NETDEV_TX_OK;
86b61a5f 1609 goto tx_err_out;
032c5e82 1610 }
142c0ac4 1611
ffc385b9 1612 if (atomic_add_return(num_entries, &tx_scrq->used)
58c8c0c0 1613 >= adapter->req_tx_entries_per_subcrq) {
0aecb13c 1614 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
142c0ac4
TF		 1615 netif_stop_subqueue(netdev, queue_num);
1616 }
1617
032c5e82
TF		 1618 tx_packets++;
1619 tx_bytes += skb->len;
1620 txq->trans_start = jiffies;
1621 ret = NETDEV_TX_OK;
86b61a5f 1622 goto out;
032c5e82 1623
86b61a5f
TF		 1624tx_err_out:
1625 /* roll back consumer index and map array*/
1626 if (tx_pool->consumer_index == 0)
1627 tx_pool->consumer_index =
1628 tx_pool->num_buffers - 1;
1629 else
1630 tx_pool->consumer_index--;
1631 tx_pool->free_map[tx_pool->consumer_index] = index;
032c5e82
TF		 1632out:
1633 netdev->stats.tx_dropped += tx_dropped;
1634 netdev->stats.tx_bytes += tx_bytes;
1635 netdev->stats.tx_packets += tx_packets;
1636 adapter->tx_send_failed += tx_send_failed;
1637 adapter->tx_map_failed += tx_map_failed;
3d52b594
JA		 1638 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1639 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1640 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
032c5e82
TF		 1641
1642 return ret;
1643}
1644
1645static void ibmvnic_set_multi(struct net_device *netdev)
1646{
1647 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1648 struct netdev_hw_addr *ha;
1649 union ibmvnic_crq crq;
1650
1651 memset(&crq, 0, sizeof(crq));
1652 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1653 crq.request_capability.cmd = REQUEST_CAPABILITY;
1654
1655 if (netdev->flags & IFF_PROMISC) {
1656 if (!adapter->promisc_supported)
1657 return;
1658 } else {
1659 if (netdev->flags & IFF_ALLMULTI) {
1660 /* Accept all multicast */
1661 memset(&crq, 0, sizeof(crq));
1662 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1663 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1664 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1665 ibmvnic_send_crq(adapter, &crq);
1666 } else if (netdev_mc_empty(netdev)) {
1667 /* Reject all multicast */
1668 memset(&crq, 0, sizeof(crq));
1669 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1670 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1671 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1672 ibmvnic_send_crq(adapter, &crq);
1673 } else {
1674 /* Accept one or more multicast(s) */
1675 netdev_for_each_mc_addr(ha, netdev) {
1676 memset(&crq, 0, sizeof(crq));
1677 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1678 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1679 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1680 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1681 ha->addr);
1682 ibmvnic_send_crq(adapter, &crq);
1683 }
1684 }
1685 }
1686}
1687
c26eba03 1688static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
032c5e82
TF		 1689{
1690 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1691 struct sockaddr *addr = p;
1692 union ibmvnic_crq crq;
9c4eaabd 1693 int rc;
032c5e82
TF		 1694
1695 if (!is_valid_ether_addr(addr->sa_data))
1696 return -EADDRNOTAVAIL;
1697
1698 memset(&crq, 0, sizeof(crq));
1699 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1700 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1701 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
f813614f
TF		 1702
1703 init_completion(&adapter->fw_done);
9c4eaabd
TF		 1704 rc = ibmvnic_send_crq(adapter, &crq);
1705 if (rc)
1706 return rc;
f813614f 1707 wait_for_completion(&adapter->fw_done);
032c5e82 1708 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
f813614f 1709 return adapter->fw_done_rc ? -EIO : 0;
032c5e82
TF		 1710}
1711
c26eba03
JA		 1712static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1713{
1714 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1715 struct sockaddr *addr = p;
f813614f 1716 int rc;
c26eba03 1717
3d166130 1718 if (adapter->state == VNIC_PROBED) {
c26eba03
JA		 1719 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1720 adapter->mac_change_pending = true;
1721 return 0;
1722 }
1723
f813614f 1724 rc = __ibmvnic_set_mac(netdev, addr);
c26eba03 1725
f813614f 1726 return rc;
c26eba03
JA		 1727}
1728
ed651a10
NF		 1729/**
1730 * do_reset returns zero if we are able to keep processing reset events, or
1731 * non-zero if we hit a fatal error and must halt.
1732 */
1733static int do_reset(struct ibmvnic_adapter *adapter,
1734 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1735{
896d8695 1736 u64 old_num_rx_queues, old_num_tx_queues;
5bf032ef 1737 u64 old_num_rx_slots, old_num_tx_slots;
ed651a10
NF		 1738 struct net_device *netdev = adapter->netdev;
1739 int i, rc;
1740
d1cf33d9
NF		 1741 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1742 rwi->reset_reason);
1743
ed651a10
NF		 1744 netif_carrier_off(netdev);
1745 adapter->reset_reason = rwi->reset_reason;
1746
896d8695
JA		 1747 old_num_rx_queues = adapter->req_rx_queues;
1748 old_num_tx_queues = adapter->req_tx_queues;
5bf032ef
TF		 1749 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1750 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
896d8695 1751
30f79625
NF		 1752 ibmvnic_cleanup(netdev);
1753
1754 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1755 adapter->reset_reason != VNIC_RESET_FAILOVER) {
18b8d6bb
TF		 1756 rc = __ibmvnic_close(netdev);
1757 if (rc)
1758 return rc;
ed651a10
NF		 1759 }
1760
c26eba03
JA		 1761 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1762 adapter->wait_for_reset) {
1763 release_resources(adapter);
d7c0ef36 1764 release_sub_crqs(adapter, 1);
c26eba03
JA		 1765 release_crq_queue(adapter);
1766 }
1767
8cb31cfc
JA		 1768 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1769 /* remove the closed state so when we call open it appears
1770 * we are coming from the probed state.
1771 */
1772 adapter->state = VNIC_PROBED;
032c5e82 1773
30f79625
NF		 1774 if (adapter->wait_for_reset) {
1775 rc = init_crq_queue(adapter);
1776 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1777 rc = ibmvnic_reenable_crq_queue(adapter);
1778 release_sub_crqs(adapter, 1);
1779 } else {
1780 rc = ibmvnic_reset_crq(adapter);
1781 if (!rc)
1782 rc = vio_enable_interrupts(adapter->vdev);
1783 }
1784
1785 if (rc) {
1786 netdev_err(adapter->netdev,
1787 "Couldn't initialize crq. rc=%d\n", rc);
1788 return rc;
1789 }
1790
8a348450 1791 rc = ibmvnic_reset_init(adapter);
8cb31cfc 1792 if (rc)
2a1bf511 1793 return IBMVNIC_INIT_FAILED;
ed651a10 1794
8cb31cfc
JA		 1795 /* If the adapter was in PROBE state prior to the reset,
1796 * exit here.
1797 */
1798 if (reset_state == VNIC_PROBED)
1799 return 0;
ed651a10 1800
8cb31cfc
JA		 1801 rc = ibmvnic_login(netdev);
1802 if (rc) {
3578a7ec
JA		 1803 adapter->state = reset_state;
1804 return rc;
8cb31cfc 1805 }
ed651a10 1806
c26eba03
JA		 1807 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1808 adapter->wait_for_reset) {
1809 rc = init_resources(adapter);
1810 if (rc)
1811 return rc;
896d8695 1812 } else if (adapter->req_rx_queues != old_num_rx_queues ||
5bf032ef
TF		 1813 adapter->req_tx_queues != old_num_tx_queues ||
1814 adapter->req_rx_add_entries_per_subcrq !=
1815 old_num_rx_slots ||
1816 adapter->req_tx_entries_per_subcrq !=
1817 old_num_tx_slots) {
896d8695
JA		 1818 release_rx_pools(adapter);
1819 release_tx_pools(adapter);
86f669b2 1820 release_napi(adapter);
a5681e20
JK		 1821 release_vpd_data(adapter);
1822
1823 rc = init_resources(adapter);
f611a5b4
TF		 1824 if (rc)
1825 return rc;
a5681e20 1826
c26eba03
JA		 1827 } else {
1828 rc = reset_tx_pools(adapter);
1829 if (rc)
1830 return rc;
8c0543ad 1831
c26eba03
JA		 1832 rc = reset_rx_pools(adapter);
1833 if (rc)
1834 return rc;
c26eba03 1835 }
134bbe7f 1836 ibmvnic_disable_irqs(adapter);
8cb31cfc 1837 }
e676d81c
JA		 1838 adapter->state = VNIC_CLOSED;
1839
1840 if (reset_state == VNIC_CLOSED)
1841 return 0;
1842
ed651a10
NF		 1843 rc = __ibmvnic_open(netdev);
1844 if (rc) {
1845 if (list_empty(&adapter->rwi_list))
1846 adapter->state = VNIC_CLOSED;
1847 else
1848 adapter->state = reset_state;
1849
1850 return 0;
1851 }
1852
ed651a10
NF		 1853 /* kick napi */
1854 for (i = 0; i < adapter->req_rx_queues; i++)
1855 napi_schedule(&adapter->napi[i]);
1856
ebc701b7
NF		 1857 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1858 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
986103e7 1859 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
61d3e1d9 1860
cc85c02e
TF		 1861 netif_carrier_on(netdev);
1862
ed651a10
NF		 1863 return 0;
1864}
1865
2770a798
TF		 1866static int do_hard_reset(struct ibmvnic_adapter *adapter,
1867 struct ibmvnic_rwi *rwi, u32 reset_state)
1868{
1869 struct net_device *netdev = adapter->netdev;
1870 int rc;
1871
1872 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1873 rwi->reset_reason);
1874
1875 netif_carrier_off(netdev);
1876 adapter->reset_reason = rwi->reset_reason;
1877
1878 ibmvnic_cleanup(netdev);
1879 release_resources(adapter);
1880 release_sub_crqs(adapter, 0);
1881 release_crq_queue(adapter);
1882
1883 /* remove the closed state so when we call open it appears
1884 * we are coming from the probed state.
1885 */
1886 adapter->state = VNIC_PROBED;
1887
1888 rc = init_crq_queue(adapter);
1889 if (rc) {
1890 netdev_err(adapter->netdev,
1891 "Couldn't initialize crq. rc=%d\n", rc);
1892 return rc;
1893 }
1894
1895 rc = ibmvnic_init(adapter);
1896 if (rc)
1897 return rc;
1898
1899 /* If the adapter was in PROBE state prior to the reset,
1900 * exit here.
1901 */
1902 if (reset_state == VNIC_PROBED)
1903 return 0;
1904
1905 rc = ibmvnic_login(netdev);
1906 if (rc) {
1907 adapter->state = VNIC_PROBED;
1908 return 0;
1909 }
a5681e20
JK		 1910
1911 rc = init_resources(adapter);
2770a798
TF		 1912 if (rc)
1913 return rc;
1914
1915 ibmvnic_disable_irqs(adapter);
1916 adapter->state = VNIC_CLOSED;
1917
1918 if (reset_state == VNIC_CLOSED)
1919 return 0;
1920
1921 rc = __ibmvnic_open(netdev);
1922 if (rc) {
1923 if (list_empty(&adapter->rwi_list))
1924 adapter->state = VNIC_CLOSED;
1925 else
1926 adapter->state = reset_state;
1927
1928 return 0;
1929 }
1930
1931 netif_carrier_on(netdev);
1932
1933 return 0;
1934}
1935
ed651a10
NF		 1936static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1937{
1938 struct ibmvnic_rwi *rwi;
6c5c7489 1939 unsigned long flags;
ed651a10 1940
6c5c7489 1941 spin_lock_irqsave(&adapter->rwi_lock, flags);
ed651a10
NF		 1942
1943 if (!list_empty(&adapter->rwi_list)) {
1944 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1945 list);
1946 list_del(&rwi->list);
1947 } else {
1948 rwi = NULL;
1949 }
1950
6c5c7489 1951 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
ed651a10
NF		 1952 return rwi;
1953}
1954
1955static void free_all_rwi(struct ibmvnic_adapter *adapter)
1956{
1957 struct ibmvnic_rwi *rwi;
1958
1959 rwi = get_next_rwi(adapter);
1960 while (rwi) {
1961 kfree(rwi);
1962 rwi = get_next_rwi(adapter);
1963 }
1964}
1965
1966static void __ibmvnic_reset(struct work_struct *work)
1967{
1968 struct ibmvnic_rwi *rwi;
1969 struct ibmvnic_adapter *adapter;
1970 struct net_device *netdev;
a5681e20 1971 bool we_lock_rtnl = false;
ed651a10 1972 u32 reset_state;
c26eba03 1973 int rc = 0;
ed651a10
NF		 1974
1975 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1976 netdev = adapter->netdev;
1977
a5681e20
JK		 1978 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1979 * unless wait_for_reset is set, in which case the rtnl lock
1980 * has already been taken before initializing the reset
1981 */
1982 if (!adapter->wait_for_reset) {
1983 rtnl_lock();
1984 we_lock_rtnl = true;
1985 }
ed651a10
NF		 1986 reset_state = adapter->state;
1987
1988 rwi = get_next_rwi(adapter);
1989 while (rwi) {
2770a798
TF		 1990 if (adapter->force_reset_recovery) {
1991 adapter->force_reset_recovery = false;
1992 rc = do_hard_reset(adapter, rwi, reset_state);
1993 } else {
1994 rc = do_reset(adapter, rwi, reset_state);
1995 }
ed651a10 1996 kfree(rwi);
2770a798
TF		 1997 if (rc && rc != IBMVNIC_INIT_FAILED &&
1998 !adapter->force_reset_recovery)
ed651a10
NF		 1999 break;
2000
2001 rwi = get_next_rwi(adapter);
2002 }
2003
c26eba03
JA		 2004 if (adapter->wait_for_reset) {
2005 adapter->wait_for_reset = false;
2006 adapter->reset_done_rc = rc;
2007 complete(&adapter->reset_done);
2008 }
2009
ed651a10 2010 if (rc) {
d1cf33d9 2011 netdev_dbg(adapter->netdev, "Reset failed\n");
ed651a10 2012 free_all_rwi(adapter);
ed651a10
NF		 2013 }
2014
2015 adapter->resetting = false;
a5681e20
JK		 2016 if (we_lock_rtnl)
2017 rtnl_unlock();
ed651a10
NF		 2018}
2019
af894d23
TF		 2020static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2021 enum ibmvnic_reset_reason reason)
ed651a10 2022{
2770a798 2023 struct list_head *entry, *tmp_entry;
ed651a10
NF		 2024 struct ibmvnic_rwi *rwi, *tmp;
2025 struct net_device *netdev = adapter->netdev;
6c5c7489 2026 unsigned long flags;
af894d23 2027 int ret;
ed651a10
NF		 2028
2029 if (adapter->state == VNIC_REMOVING ||
5a18e1e0
TF		 2030 adapter->state == VNIC_REMOVED ||
2031 adapter->failover_pending) {
af894d23 2032 ret = EBUSY;
5a18e1e0 2033 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
af894d23 2034 goto err;
ed651a10
NF		 2035 }
2036
6a2fb0e9
NF		 2037 if (adapter->state == VNIC_PROBING) {
2038 netdev_warn(netdev, "Adapter reset during probe\n");
af894d23
TF		 2039 ret = adapter->init_done_rc = EAGAIN;
2040 goto err;
6a2fb0e9
NF		 2041 }
2042
6c5c7489 2043 spin_lock_irqsave(&adapter->rwi_lock, flags);
ed651a10
NF		 2044
2045 list_for_each(entry, &adapter->rwi_list) {
2046 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2047 if (tmp->reset_reason == reason) {
d1cf33d9 2048 netdev_dbg(netdev, "Skipping matching reset\n");
6c5c7489 2049 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
af894d23
TF		 2050 ret = EBUSY;
2051 goto err;
ed651a10
NF		 2052 }
2053 }
2054
1d1bbc37 2055 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
ed651a10 2056 if (!rwi) {
6c5c7489 2057 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
ed651a10 2058 ibmvnic_close(netdev);
af894d23
TF		 2059 ret = ENOMEM;
2060 goto err;
ed651a10 2061 }
2770a798
TF		 2062 /* if we just received a transport event,
2063 * flush reset queue and process this reset
2064 */
2065 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2066 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2067 list_del(entry);
2068 }
ed651a10
NF		 2069 rwi->reset_reason = reason;
2070 list_add_tail(&rwi->list, &adapter->rwi_list);
6c5c7489 2071 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
06e43d7f 2072 adapter->resetting = true;
d1cf33d9 2073 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
ed651a10 2074 schedule_work(&adapter->ibmvnic_reset);
af894d23
TF		 2075
2076 return 0;
2077err:
2078 if (adapter->wait_for_reset)
2079 adapter->wait_for_reset = false;
2080 return -ret;
ed651a10
NF		 2081}
2082
2083static void ibmvnic_tx_timeout(struct net_device *dev)
2084{
2085 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2086
2087 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 2088}
2089
2090static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2091 struct ibmvnic_rx_buff *rx_buff)
2092{
2093 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2094
2095 rx_buff->skb = NULL;
2096
2097 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2098 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2099
2100 atomic_dec(&pool->available);
2101}
2102
2103static int ibmvnic_poll(struct napi_struct *napi, int budget)
2104{
2105 struct net_device *netdev = napi->dev;
2106 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2107 int scrq_num = (int)(napi - adapter->napi);
2108 int frames_processed = 0;
152ce47d 2109
032c5e82
TF		 2110restart_poll:
2111 while (frames_processed < budget) {
2112 struct sk_buff *skb;
2113 struct ibmvnic_rx_buff *rx_buff;
2114 union sub_crq *next;
2115 u32 length;
2116 u16 offset;
2117 u8 flags = 0;
2118
3468656f
JA		 2119 if (unlikely(adapter->resetting &&
2120 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
21ecba6c
TF		 2121 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2122 napi_complete_done(napi, frames_processed);
2123 return frames_processed;
2124 }
2125
032c5e82
TF		 2126 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2127 break;
2128 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2129 rx_buff =
2130 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2131 rx_comp.correlator);
2132 /* do error checking */
2133 if (next->rx_comp.rc) {
e1cea2e7
JA		 2134 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2135 be16_to_cpu(next->rx_comp.rc));
032c5e82
TF		 2136 /* free the entry */
2137 next->rx_comp.first = 0;
4b9b0f01 2138 dev_kfree_skb_any(rx_buff->skb);
032c5e82 2139 remove_buff_from_pool(adapter, rx_buff);
ca05e316 2140 continue;
abe27a88
TF		 2141 } else if (!rx_buff->skb) {
2142 /* free the entry */
2143 next->rx_comp.first = 0;
2144 remove_buff_from_pool(adapter, rx_buff);
2145 continue;
032c5e82
TF		 2146 }
2147
2148 length = be32_to_cpu(next->rx_comp.len);
2149 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2150 flags = next->rx_comp.flags;
2151 skb = rx_buff->skb;
2152 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2153 length);
6052d5e2
MFV		 2154
2155 /* VLAN Header has been stripped by the system firmware and
2156 * needs to be inserted by the driver
2157 */
2158 if (adapter->rx_vlan_header_insertion &&
2159 (flags & IBMVNIC_VLAN_STRIPPED))
2160 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2161 ntohs(next->rx_comp.vlan_tci));
2162
032c5e82
TF		 2163 /* free the entry */
2164 next->rx_comp.first = 0;
2165 remove_buff_from_pool(adapter, rx_buff);
2166
2167 skb_put(skb, length);
2168 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 2169 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 2170
2171 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2172 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2173 skb->ip_summed = CHECKSUM_UNNECESSARY;
2174 }
2175
2176 length = skb->len;
2177 napi_gro_receive(napi, skb); /* send it up */
2178 netdev->stats.rx_packets++;
2179 netdev->stats.rx_bytes += length;
3d52b594
JA		 2180 adapter->rx_stats_buffers[scrq_num].packets++;
2181 adapter->rx_stats_buffers[scrq_num].bytes += length;
032c5e82
TF		 2182 frames_processed++;
2183 }
152ce47d
NF		 2184
2185 if (adapter->state != VNIC_CLOSING)
2186 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 2187
2188 if (frames_processed < budget) {
2189 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 2190 napi_complete_done(napi, frames_processed);
032c5e82
TF		 2191 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2192 napi_reschedule(napi)) {
2193 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2194 goto restart_poll;
2195 }
2196 }
2197 return frames_processed;
2198}
2199
c26eba03
JA		 2200static int wait_for_reset(struct ibmvnic_adapter *adapter)
2201{
af894d23
TF		 2202 int rc, ret;
2203
c26eba03
JA		 2204 adapter->fallback.mtu = adapter->req_mtu;
2205 adapter->fallback.rx_queues = adapter->req_rx_queues;
2206 adapter->fallback.tx_queues = adapter->req_tx_queues;
2207 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2208 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2209
2210 init_completion(&adapter->reset_done);
c26eba03 2211 adapter->wait_for_reset = true;
af894d23
TF		 2212 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2213 if (rc)
2214 return rc;
c26eba03
JA		 2215 wait_for_completion(&adapter->reset_done);
2216
af894d23 2217 ret = 0;
c26eba03 2218 if (adapter->reset_done_rc) {
af894d23 2219 ret = -EIO;
c26eba03
JA		 2220 adapter->desired.mtu = adapter->fallback.mtu;
2221 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2222 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2223 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2224 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2225
2226 init_completion(&adapter->reset_done);
af894d23
TF		 2227 adapter->wait_for_reset = true;
2228 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2229 if (rc)
2230 return ret;
c26eba03
JA		 2231 wait_for_completion(&adapter->reset_done);
2232 }
2233 adapter->wait_for_reset = false;
2234
af894d23 2235 return ret;
c26eba03
JA		 2236}
2237
3a807b75
JA		 2238static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2239{
c26eba03
JA		 2240 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2241
2242 adapter->desired.mtu = new_mtu + ETH_HLEN;
2243
2244 return wait_for_reset(adapter);
3a807b75
JA		 2245}
2246
f10b09ef
TF		 2247static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2248 struct net_device *dev,
2249 netdev_features_t features)
2250{
2251 /* Some backing hardware adapters can not
2252 * handle packets with a MSS less than 224
2253 * or with only one segment.
2254 */
2255 if (skb_is_gso(skb)) {
2256 if (skb_shinfo(skb)->gso_size < 224 ||
2257 skb_shinfo(skb)->gso_segs == 1)
2258 features &= ~NETIF_F_GSO_MASK;
2259 }
2260
2261 return features;
2262}
2263
032c5e82
TF		 2264static const struct net_device_ops ibmvnic_netdev_ops = {
2265 .ndo_open = ibmvnic_open,
2266 .ndo_stop = ibmvnic_close,
2267 .ndo_start_xmit = ibmvnic_xmit,
2268 .ndo_set_rx_mode = ibmvnic_set_multi,
2269 .ndo_set_mac_address = ibmvnic_set_mac,
2270 .ndo_validate_addr = eth_validate_addr,
032c5e82 2271 .ndo_tx_timeout = ibmvnic_tx_timeout,
3a807b75 2272 .ndo_change_mtu = ibmvnic_change_mtu,
f10b09ef 2273 .ndo_features_check = ibmvnic_features_check,
032c5e82
TF		 2274};
2275
2276/* ethtool functions */
2277
8a43379f
PR		 2278static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2279 struct ethtool_link_ksettings *cmd)
032c5e82 2280{
8a43379f
PR		 2281 u32 supported, advertising;
2282
2283 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 2284 SUPPORTED_FIBRE);
8a43379f 2285 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 2286 ADVERTISED_FIBRE);
8a43379f
PR		 2287 cmd->base.speed = SPEED_1000;
2288 cmd->base.duplex = DUPLEX_FULL;
2289 cmd->base.port = PORT_FIBRE;
2290 cmd->base.phy_address = 0;
2291 cmd->base.autoneg = AUTONEG_ENABLE;
2292
2293 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2294 supported);
2295 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2296 advertising);
2297
032c5e82
TF		 2298 return 0;
2299}
2300
4e6759be 2301static void ibmvnic_get_drvinfo(struct net_device *netdev,
032c5e82
TF		 2302 struct ethtool_drvinfo *info)
2303{
4e6759be
DANR		 2304 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2305
032c5e82
TF		 2306 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2307 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
4e6759be
DANR		 2308 strlcpy(info->fw_version, adapter->fw_version,
2309 sizeof(info->fw_version));
032c5e82
TF		 2310}
2311
2312static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2313{
2314 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2315
2316 return adapter->msg_enable;
2317}
2318
2319static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2320{
2321 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2322
2323 adapter->msg_enable = data;
2324}
2325
2326static u32 ibmvnic_get_link(struct net_device *netdev)
2327{
2328 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2329
2330 /* Don't need to send a query because we request a logical link up at
2331 * init and then we wait for link state indications
2332 */
2333 return adapter->logical_link_state;
2334}
2335
2336static void ibmvnic_get_ringparam(struct net_device *netdev,
2337 struct ethtool_ringparam *ring)
2338{
bc131b3a
JA		 2339 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2340
723ad916
TF		 2341 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2342 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2343 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2344 } else {
2345 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2346 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2347 }
032c5e82
TF		 2348 ring->rx_mini_max_pending = 0;
2349 ring->rx_jumbo_max_pending = 0;
bc131b3a
JA		 2350 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2351 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2352 ring->rx_mini_pending = 0;
2353 ring->rx_jumbo_pending = 0;
2354}
2355
c26eba03
JA		 2356static int ibmvnic_set_ringparam(struct net_device *netdev,
2357 struct ethtool_ringparam *ring)
2358{
2359 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
723ad916 2360 int ret;
c26eba03 2361
723ad916 2362 ret = 0;
c26eba03
JA		 2363 adapter->desired.rx_entries = ring->rx_pending;
2364 adapter->desired.tx_entries = ring->tx_pending;
2365
723ad916
TF		 2366 ret = wait_for_reset(adapter);
2367
2368 if (!ret &&
2369 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2370 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2371 netdev_info(netdev,
2372 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2373 ring->rx_pending, ring->tx_pending,
2374 adapter->req_rx_add_entries_per_subcrq,
2375 adapter->req_tx_entries_per_subcrq);
2376 return ret;
c26eba03
JA		 2377}
2378
c2dbeb67
JA		 2379static void ibmvnic_get_channels(struct net_device *netdev,
2380 struct ethtool_channels *channels)
2381{
2382 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2383
723ad916
TF		 2384 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2385 channels->max_rx = adapter->max_rx_queues;
2386 channels->max_tx = adapter->max_tx_queues;
2387 } else {
2388 channels->max_rx = IBMVNIC_MAX_QUEUES;
2389 channels->max_tx = IBMVNIC_MAX_QUEUES;
2390 }
2391
c2dbeb67
JA		 2392 channels->max_other = 0;
2393 channels->max_combined = 0;
2394 channels->rx_count = adapter->req_rx_queues;
2395 channels->tx_count = adapter->req_tx_queues;
2396 channels->other_count = 0;
2397 channels->combined_count = 0;
2398}
2399
c26eba03
JA		 2400static int ibmvnic_set_channels(struct net_device *netdev,
2401 struct ethtool_channels *channels)
2402{
2403 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
723ad916 2404 int ret;
c26eba03 2405
723ad916 2406 ret = 0;
c26eba03
JA		 2407 adapter->desired.rx_queues = channels->rx_count;
2408 adapter->desired.tx_queues = channels->tx_count;
2409
723ad916
TF		 2410 ret = wait_for_reset(adapter);
2411
2412 if (!ret &&
2413 (adapter->req_rx_queues != channels->rx_count ||
2414 adapter->req_tx_queues != channels->tx_count))
2415 netdev_info(netdev,
2416 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2417 channels->rx_count, channels->tx_count,
2418 adapter->req_rx_queues, adapter->req_tx_queues);
2419 return ret;
2420
c26eba03
JA		 2421}
2422
032c5e82
TF		 2423static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2424{
3d52b594 2425 struct ibmvnic_adapter *adapter = netdev_priv(dev);
032c5e82
TF		 2426 int i;
2427
723ad916
TF		 2428 switch (stringset) {
2429 case ETH_SS_STATS:
2430 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2431 i++, data += ETH_GSTRING_LEN)
2432 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
032c5e82 2433
723ad916
TF		 2434 for (i = 0; i < adapter->req_tx_queues; i++) {
2435 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2436 data += ETH_GSTRING_LEN;
3d52b594 2437
723ad916
TF		 2438 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2439 data += ETH_GSTRING_LEN;
3d52b594 2440
723ad916
TF		 2441 snprintf(data, ETH_GSTRING_LEN,
2442 "tx%d_dropped_packets", i);
2443 data += ETH_GSTRING_LEN;
2444 }
3d52b594 2445
723ad916
TF		 2446 for (i = 0; i < adapter->req_rx_queues; i++) {
2447 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2448 data += ETH_GSTRING_LEN;
3d52b594 2449
723ad916
TF		 2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2451 data += ETH_GSTRING_LEN;
3d52b594 2452
723ad916
TF		 2453 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2454 data += ETH_GSTRING_LEN;
2455 }
2456 break;
3d52b594 2457
723ad916
TF		 2458 case ETH_SS_PRIV_FLAGS:
2459 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2460 strcpy(data + i * ETH_GSTRING_LEN,
2461 ibmvnic_priv_flags[i]);
2462 break;
2463 default:
2464 return;
3d52b594 2465 }
032c5e82
TF		 2466}
2467
2468static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2469{
3d52b594
JA		 2470 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2471
032c5e82
TF		 2472 switch (sset) {
2473 case ETH_SS_STATS:
3d52b594
JA		 2474 return ARRAY_SIZE(ibmvnic_stats) +
2475 adapter->req_tx_queues * NUM_TX_STATS +
2476 adapter->req_rx_queues * NUM_RX_STATS;
723ad916
TF		 2477 case ETH_SS_PRIV_FLAGS:
2478 return ARRAY_SIZE(ibmvnic_priv_flags);
032c5e82
TF		 2479 default:
2480 return -EOPNOTSUPP;
2481 }
2482}
2483
2484static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2485 struct ethtool_stats *stats, u64 *data)
2486{
2487 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2488 union ibmvnic_crq crq;
3d52b594 2489 int i, j;
9c4eaabd 2490 int rc;
032c5e82
TF		 2491
2492 memset(&crq, 0, sizeof(crq));
2493 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2494 crq.request_statistics.cmd = REQUEST_STATISTICS;
2495 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2496 crq.request_statistics.len =
2497 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 2498
2499 /* Wait for data to be written */
2500 init_completion(&adapter->stats_done);
9c4eaabd
TF		 2501 rc = ibmvnic_send_crq(adapter, &crq);
2502 if (rc)
2503 return;
032c5e82
TF		 2504 wait_for_completion(&adapter->stats_done);
2505
2506 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
52da5c11
JA		 2507 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2508 ibmvnic_stats[i].offset));
3d52b594
JA		 2509
2510 for (j = 0; j < adapter->req_tx_queues; j++) {
2511 data[i] = adapter->tx_stats_buffers[j].packets;
2512 i++;
2513 data[i] = adapter->tx_stats_buffers[j].bytes;
2514 i++;
2515 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2516 i++;
2517 }
2518
2519 for (j = 0; j < adapter->req_rx_queues; j++) {
2520 data[i] = adapter->rx_stats_buffers[j].packets;
2521 i++;
2522 data[i] = adapter->rx_stats_buffers[j].bytes;
2523 i++;
2524 data[i] = adapter->rx_stats_buffers[j].interrupts;
2525 i++;
2526 }
032c5e82
TF		 2527}
2528
723ad916
TF		 2529static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2530{
2531 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2532
2533 return adapter->priv_flags;
2534}
2535
2536static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2537{
2538 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2539 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2540
2541 if (which_maxes)
2542 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2543 else
2544 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2545
2546 return 0;
2547}
032c5e82 2548static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 2549 .get_drvinfo = ibmvnic_get_drvinfo,
2550 .get_msglevel = ibmvnic_get_msglevel,
2551 .set_msglevel = ibmvnic_set_msglevel,
2552 .get_link = ibmvnic_get_link,
2553 .get_ringparam = ibmvnic_get_ringparam,
c26eba03 2554 .set_ringparam = ibmvnic_set_ringparam,
c2dbeb67 2555 .get_channels = ibmvnic_get_channels,
c26eba03 2556 .set_channels = ibmvnic_set_channels,
032c5e82
TF		 2557 .get_strings = ibmvnic_get_strings,
2558 .get_sset_count = ibmvnic_get_sset_count,
2559 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 2560 .get_link_ksettings = ibmvnic_get_link_ksettings,
723ad916
TF		 2561 .get_priv_flags = ibmvnic_get_priv_flags,
2562 .set_priv_flags = ibmvnic_set_priv_flags,
032c5e82
TF		 2563};
2564
2565/* Routines for managing CRQs/sCRQs */
2566
57a49436
NF		 2567static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2568 struct ibmvnic_sub_crq_queue *scrq)
2569{
2570 int rc;
2571
2572 if (scrq->irq) {
2573 free_irq(scrq->irq, scrq);
2574 irq_dispose_mapping(scrq->irq);
2575 scrq->irq = 0;
2576 }
2577
c8b2ad0a 2578 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
41f71467 2579 atomic_set(&scrq->used, 0);
57a49436
NF		 2580 scrq->cur = 0;
2581
2582 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2583 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2584 return rc;
2585}
2586
2587static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2588{
2589 int i, rc;
2590
2591 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 2592 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
57a49436
NF		 2593 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2594 if (rc)
2595 return rc;
2596 }
2597
2598 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 2599 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
57a49436
NF		 2600 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2601 if (rc)
2602 return rc;
2603 }
2604
57a49436
NF		 2605 return rc;
2606}
2607
032c5e82 2608static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
d7c0ef36
NF		 2609 struct ibmvnic_sub_crq_queue *scrq,
2610 bool do_h_free)
032c5e82
TF		 2611{
2612 struct device *dev = &adapter->vdev->dev;
2613 long rc;
2614
2615 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2616
d7c0ef36
NF		 2617 if (do_h_free) {
2618 /* Close the sub-crqs */
2619 do {
2620 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2621 adapter->vdev->unit_address,
2622 scrq->crq_num);
2623 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
032c5e82 2624
d7c0ef36
NF		 2625 if (rc) {
2626 netdev_err(adapter->netdev,
2627 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2628 scrq->crq_num, rc);
2629 }
ffa73855
TF		 2630 }
2631
032c5e82
TF		 2632 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2633 DMA_BIDIRECTIONAL);
2634 free_pages((unsigned long)scrq->msgs, 2);
2635 kfree(scrq);
2636}
2637
2638static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2639 *adapter)
2640{
2641 struct device *dev = &adapter->vdev->dev;
2642 struct ibmvnic_sub_crq_queue *scrq;
2643 int rc;
2644
1bb3c739 2645 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 2646 if (!scrq)
2647 return NULL;
2648
7f7adc50 2649 scrq->msgs =
1bb3c739 2650 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 2651 if (!scrq->msgs) {
2652 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2653 goto zero_page_failed;
2654 }
2655
2656 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2657 DMA_BIDIRECTIONAL);
2658 if (dma_mapping_error(dev, scrq->msg_token)) {
2659 dev_warn(dev, "Couldn't map crq queue messages page\n");
2660 goto map_failed;
2661 }
2662
2663 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2664 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2665
2666 if (rc == H_RESOURCE)
2667 rc = ibmvnic_reset_crq(adapter);
2668
2669 if (rc == H_CLOSED) {
2670 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2671 } else if (rc) {
2672 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2673 goto reg_failed;
2674 }
2675
032c5e82
TF		 2676 scrq->adapter = adapter;
2677 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 2678 spin_lock_init(&scrq->lock);
2679
2680 netdev_dbg(adapter->netdev,
2681 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2682 scrq->crq_num, scrq->hw_irq, scrq->irq);
2683
2684 return scrq;
2685
032c5e82
TF		 2686reg_failed:
2687 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2688 DMA_BIDIRECTIONAL);
2689map_failed:
2690 free_pages((unsigned long)scrq->msgs, 2);
2691zero_page_failed:
2692 kfree(scrq);
2693
2694 return NULL;
2695}
2696
d7c0ef36 2697static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
032c5e82
TF		 2698{
2699 int i;
2700
2701 if (adapter->tx_scrq) {
82e3be32 2702 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
b510888f
NF		 2703 if (!adapter->tx_scrq[i])
2704 continue;
2705
d1cf33d9
NF		 2706 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2707 i);
b510888f 2708 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 2709 free_irq(adapter->tx_scrq[i]->irq,
2710 adapter->tx_scrq[i]);
88eb98a0 2711 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 2712 adapter->tx_scrq[i]->irq = 0;
032c5e82 2713 }
b510888f 2714
d7c0ef36
NF		 2715 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2716 do_h_free);
b510888f
NF		 2717 }
2718
9501df3c 2719 kfree(adapter->tx_scrq);
032c5e82 2720 adapter->tx_scrq = NULL;
82e3be32 2721 adapter->num_active_tx_scrqs = 0;
032c5e82
TF		 2722 }
2723
2724 if (adapter->rx_scrq) {
82e3be32 2725 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
b510888f
NF		 2726 if (!adapter->rx_scrq[i])
2727 continue;
2728
d1cf33d9
NF		 2729 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2730 i);
b510888f 2731 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 2732 free_irq(adapter->rx_scrq[i]->irq,
2733 adapter->rx_scrq[i]);
88eb98a0 2734 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 2735 adapter->rx_scrq[i]->irq = 0;
032c5e82 2736 }
032c5e82 2737
d7c0ef36
NF		 2738 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2739 do_h_free);
b510888f 2740 }
ea22d51a 2741
b510888f 2742 kfree(adapter->rx_scrq);
ea22d51a 2743 adapter->rx_scrq = NULL;
82e3be32 2744 adapter->num_active_rx_scrqs = 0;
ea22d51a 2745 }
ea22d51a
TF		 2746}
2747
032c5e82
TF		 2748static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2749 struct ibmvnic_sub_crq_queue *scrq)
2750{
2751 struct device *dev = &adapter->vdev->dev;
2752 unsigned long rc;
2753
2754 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2755 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2756 if (rc)
2757 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2758 scrq->hw_irq, rc);
2759 return rc;
2760}
2761
2762static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2763 struct ibmvnic_sub_crq_queue *scrq)
2764{
2765 struct device *dev = &adapter->vdev->dev;
2766 unsigned long rc;
2767
2768 if (scrq->hw_irq > 0x100000000ULL) {
2769 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2770 return 1;
2771 }
2772
73f9d364
NF		 2773 if (adapter->resetting &&
2774 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2775 u64 val = (0xff000000) | scrq->hw_irq;
2776
2777 rc = plpar_hcall_norets(H_EOI, val);
2778 if (rc)
2779 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2780 val, rc);
2781 }
f23e0643 2782
032c5e82
TF		 2783 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2784 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2785 if (rc)
2786 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2787 scrq->hw_irq, rc);
2788 return rc;
2789}
2790
2791static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2792 struct ibmvnic_sub_crq_queue *scrq)
2793{
2794 struct device *dev = &adapter->vdev->dev;
06b3e357 2795 struct ibmvnic_tx_pool *tx_pool;
032c5e82
TF		 2796 struct ibmvnic_tx_buff *txbuff;
2797 union sub_crq *next;
2798 int index;
2799 int i, j;
37e40fa8 2800 u8 *first;
032c5e82
TF		 2801
2802restart_loop:
2803 while (pending_scrq(adapter, scrq)) {
2804 unsigned int pool = scrq->pool_index;
ffc385b9 2805 int num_entries = 0;
032c5e82
TF		 2806
2807 next = ibmvnic_next_scrq(adapter, scrq);
2808 for (i = 0; i < next->tx_comp.num_comps; i++) {
2809 if (next->tx_comp.rcs[i]) {
2810 dev_err(dev, "tx error %x\n",
2811 next->tx_comp.rcs[i]);
2812 continue;
2813 }
2814 index = be32_to_cpu(next->tx_comp.correlators[i]);
06b3e357
TF		 2815 if (index & IBMVNIC_TSO_POOL_MASK) {
2816 tx_pool = &adapter->tso_pool[pool];
2817 index &= ~IBMVNIC_TSO_POOL_MASK;
2818 } else {
2819 tx_pool = &adapter->tx_pool[pool];
2820 }
2821
2822 txbuff = &tx_pool->tx_buff[index];
032c5e82
TF		 2823
2824 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2825 if (!txbuff->data_dma[j])
2826 continue;
2827
2828 txbuff->data_dma[j] = 0;
032c5e82 2829 }
ad7775dc 2830 /* if sub_crq was sent indirectly */
37e40fa8
TF		 2831 first = &txbuff->indir_arr[0].generic.first;
2832 if (*first == IBMVNIC_CRQ_CMD) {
ad7775dc
TF		 2833 dma_unmap_single(dev, txbuff->indir_dma,
2834 sizeof(txbuff->indir_arr),
2835 DMA_TO_DEVICE);
37e40fa8 2836 *first = 0;
ad7775dc 2837 }
032c5e82 2838
142c0ac4 2839 if (txbuff->last_frag) {
032c5e82 2840 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 2841 txbuff->skb = NULL;
142c0ac4 2842 }
032c5e82 2843
ffc385b9
TF		 2844 num_entries += txbuff->num_entries;
2845
06b3e357
TF		 2846 tx_pool->free_map[tx_pool->producer_index] = index;
2847 tx_pool->producer_index =
2848 (tx_pool->producer_index + 1) %
2849 tx_pool->num_buffers;
032c5e82
TF		 2850 }
2851 /* remove tx_comp scrq*/
2852 next->tx_comp.first = 0;
7c3e7de3 2853
ffc385b9 2854 if (atomic_sub_return(num_entries, &scrq->used) <=
7c3e7de3
NF		 2855 (adapter->req_tx_entries_per_subcrq / 2) &&
2856 __netif_subqueue_stopped(adapter->netdev,
2857 scrq->pool_index)) {
2858 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
0aecb13c
TF		 2859 netdev_dbg(adapter->netdev, "Started queue %d\n",
2860 scrq->pool_index);
7c3e7de3 2861 }
032c5e82
TF		 2862 }
2863
2864 enable_scrq_irq(adapter, scrq);
2865
2866 if (pending_scrq(adapter, scrq)) {
2867 disable_scrq_irq(adapter, scrq);
2868 goto restart_loop;
2869 }
2870
2871 return 0;
2872}
2873
2874static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2875{
2876 struct ibmvnic_sub_crq_queue *scrq = instance;
2877 struct ibmvnic_adapter *adapter = scrq->adapter;
2878
2879 disable_scrq_irq(adapter, scrq);
2880 ibmvnic_complete_tx(adapter, scrq);
2881
2882 return IRQ_HANDLED;
2883}
2884
2885static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2886{
2887 struct ibmvnic_sub_crq_queue *scrq = instance;
2888 struct ibmvnic_adapter *adapter = scrq->adapter;
2889
09fb35ea
NF		 2890 /* When booting a kdump kernel we can hit pending interrupts
2891 * prior to completing driver initialization.
2892 */
2893 if (unlikely(adapter->state != VNIC_OPEN))
2894 return IRQ_NONE;
2895
3d52b594
JA		 2896 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2897
032c5e82
TF		 2898 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2899 disable_scrq_irq(adapter, scrq);
2900 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2901 }
2902
2903 return IRQ_HANDLED;
2904}
2905
ea22d51a
TF		 2906static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2907{
2908 struct device *dev = &adapter->vdev->dev;
2909 struct ibmvnic_sub_crq_queue *scrq;
2910 int i = 0, j = 0;
2911 int rc = 0;
2912
2913 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9
NF		 2914 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2915 i);
ea22d51a
TF		 2916 scrq = adapter->tx_scrq[i];
2917 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2918
99c1790e 2919 if (!scrq->irq) {
ea22d51a
TF		 2920 rc = -EINVAL;
2921 dev_err(dev, "Error mapping irq\n");
2922 goto req_tx_irq_failed;
2923 }
2924
2925 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2926 0, "ibmvnic_tx", scrq);
2927
2928 if (rc) {
2929 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2930 scrq->irq, rc);
2931 irq_dispose_mapping(scrq->irq);
af9090c2 2932 goto req_tx_irq_failed;
ea22d51a
TF		 2933 }
2934 }
2935
2936 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 2937 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2938 i);
ea22d51a
TF		 2939 scrq = adapter->rx_scrq[i];
2940 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2941 if (!scrq->irq) {
ea22d51a
TF		 2942 rc = -EINVAL;
2943 dev_err(dev, "Error mapping irq\n");
2944 goto req_rx_irq_failed;
2945 }
2946 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2947 0, "ibmvnic_rx", scrq);
2948 if (rc) {
2949 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2950 scrq->irq, rc);
2951 irq_dispose_mapping(scrq->irq);
2952 goto req_rx_irq_failed;
2953 }
2954 }
2955 return rc;
2956
2957req_rx_irq_failed:
8bf371e6 2958 for (j = 0; j < i; j++) {
ea22d51a
TF		 2959 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2960 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2961 }
ea22d51a
TF		 2962 i = adapter->req_tx_queues;
2963req_tx_irq_failed:
8bf371e6 2964 for (j = 0; j < i; j++) {
ea22d51a
TF		 2965 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2966 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2967 }
d7c0ef36 2968 release_sub_crqs(adapter, 1);
ea22d51a
TF		 2969 return rc;
2970}
2971
d346b9bc 2972static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2973{
2974 struct device *dev = &adapter->vdev->dev;
2975 struct ibmvnic_sub_crq_queue **allqueues;
2976 int registered_queues = 0;
032c5e82
TF		 2977 int total_queues;
2978 int more = 0;
ea22d51a 2979 int i;
032c5e82 2980
032c5e82
TF		 2981 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2982
1bb3c739 2983 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2984 if (!allqueues)
d346b9bc 2985 return -1;
032c5e82
TF		 2986
2987 for (i = 0; i < total_queues; i++) {
2988 allqueues[i] = init_sub_crq_queue(adapter);
2989 if (!allqueues[i]) {
2990 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2991 break;
2992 }
2993 registered_queues++;
2994 }
2995
2996 /* Make sure we were able to register the minimum number of queues */
2997 if (registered_queues <
2998 adapter->min_tx_queues + adapter->min_rx_queues) {
2999 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3000 goto tx_failed;
3001 }
3002
3003 /* Distribute the failed allocated queues*/
3004 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3005 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3006 switch (i % 3) {
3007 case 0:
3008 if (adapter->req_rx_queues > adapter->min_rx_queues)
3009 adapter->req_rx_queues--;
3010 else
3011 more++;
3012 break;
3013 case 1:
3014 if (adapter->req_tx_queues > adapter->min_tx_queues)
3015 adapter->req_tx_queues--;
3016 else
3017 more++;
3018 break;
3019 }
3020 }
3021
3022 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 3023 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 3024 if (!adapter->tx_scrq)
3025 goto tx_failed;
3026
3027 for (i = 0; i < adapter->req_tx_queues; i++) {
3028 adapter->tx_scrq[i] = allqueues[i];
3029 adapter->tx_scrq[i]->pool_index = i;
82e3be32 3030 adapter->num_active_tx_scrqs++;
032c5e82
TF		 3031 }
3032
3033 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 3034 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 3035 if (!adapter->rx_scrq)
3036 goto rx_failed;
3037
3038 for (i = 0; i < adapter->req_rx_queues; i++) {
3039 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3040 adapter->rx_scrq[i]->scrq_num = i;
82e3be32 3041 adapter->num_active_rx_scrqs++;
032c5e82
TF		 3042 }
3043
d346b9bc
NF		 3044 kfree(allqueues);
3045 return 0;
3046
3047rx_failed:
3048 kfree(adapter->tx_scrq);
3049 adapter->tx_scrq = NULL;
3050tx_failed:
3051 for (i = 0; i < registered_queues; i++)
d7c0ef36 3052 release_sub_crq_queue(adapter, allqueues[i], 1);
d346b9bc
NF		 3053 kfree(allqueues);
3054 return -1;
3055}
3056
3057static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3058{
3059 struct device *dev = &adapter->vdev->dev;
3060 union ibmvnic_crq crq;
c26eba03 3061 int max_entries;
d346b9bc
NF		 3062
3063 if (!retry) {
3064 /* Sub-CRQ entries are 32 byte long */
3065 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3066
3067 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3068 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3069 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3070 return;
3071 }
3072
c26eba03
JA		 3073 if (adapter->desired.mtu)
3074 adapter->req_mtu = adapter->desired.mtu;
3075 else
3076 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3077
3078 if (!adapter->desired.tx_entries)
3079 adapter->desired.tx_entries =
3080 adapter->max_tx_entries_per_subcrq;
3081 if (!adapter->desired.rx_entries)
3082 adapter->desired.rx_entries =
3083 adapter->max_rx_add_entries_per_subcrq;
3084
3085 max_entries = IBMVNIC_MAX_LTB_SIZE /
3086 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3087
3088 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3089 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3090 adapter->desired.tx_entries = max_entries;
3091 }
d346b9bc 3092
c26eba03
JA		 3093 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3094 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3095 adapter->desired.rx_entries = max_entries;
3096 }
3097
3098 if (adapter->desired.tx_entries)
3099 adapter->req_tx_entries_per_subcrq =
3100 adapter->desired.tx_entries;
3101 else
3102 adapter->req_tx_entries_per_subcrq =
3103 adapter->max_tx_entries_per_subcrq;
3104
3105 if (adapter->desired.rx_entries)
3106 adapter->req_rx_add_entries_per_subcrq =
3107 adapter->desired.rx_entries;
3108 else
3109 adapter->req_rx_add_entries_per_subcrq =
3110 adapter->max_rx_add_entries_per_subcrq;
3111
3112 if (adapter->desired.tx_queues)
3113 adapter->req_tx_queues =
3114 adapter->desired.tx_queues;
3115 else
3116 adapter->req_tx_queues =
3117 adapter->opt_tx_comp_sub_queues;
3118
3119 if (adapter->desired.rx_queues)
3120 adapter->req_rx_queues =
3121 adapter->desired.rx_queues;
3122 else
3123 adapter->req_rx_queues =
3124 adapter->opt_rx_comp_queues;
3125
3126 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
d346b9bc
NF		 3127 }
3128
032c5e82
TF		 3129 memset(&crq, 0, sizeof(crq));
3130 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3131 crq.request_capability.cmd = REQUEST_CAPABILITY;
3132
3133 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 3134 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 3135 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3136 ibmvnic_send_crq(adapter, &crq);
3137
3138 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 3139 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 3140 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3141 ibmvnic_send_crq(adapter, &crq);
3142
3143 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 3144 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 3145 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3146 ibmvnic_send_crq(adapter, &crq);
3147
3148 crq.request_capability.capability =
3149 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3150 crq.request_capability.number =
de89e854 3151 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 3152 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3153 ibmvnic_send_crq(adapter, &crq);
3154
3155 crq.request_capability.capability =
3156 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3157 crq.request_capability.number =
de89e854 3158 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 3159 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3160 ibmvnic_send_crq(adapter, &crq);
3161
3162 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 3163 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 3164 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3165 ibmvnic_send_crq(adapter, &crq);
3166
3167 if (adapter->netdev->flags & IFF_PROMISC) {
3168 if (adapter->promisc_supported) {
3169 crq.request_capability.capability =
3170 cpu_to_be16(PROMISC_REQUESTED);
de89e854 3171 crq.request_capability.number = cpu_to_be64(1);
901e040a 3172 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3173 ibmvnic_send_crq(adapter, &crq);
3174 }
3175 } else {
3176 crq.request_capability.capability =
3177 cpu_to_be16(PROMISC_REQUESTED);
de89e854 3178 crq.request_capability.number = cpu_to_be64(0);
901e040a 3179 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3180 ibmvnic_send_crq(adapter, &crq);
3181 }
032c5e82
TF		 3182}
3183
3184static int pending_scrq(struct ibmvnic_adapter *adapter,
3185 struct ibmvnic_sub_crq_queue *scrq)
3186{
3187 union sub_crq *entry = &scrq->msgs[scrq->cur];
3188
1cf9cc72 3189 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
032c5e82
TF		 3190 return 1;
3191 else
3192 return 0;
3193}
3194
3195static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3196 struct ibmvnic_sub_crq_queue *scrq)
3197{
3198 union sub_crq *entry;
3199 unsigned long flags;
3200
3201 spin_lock_irqsave(&scrq->lock, flags);
3202 entry = &scrq->msgs[scrq->cur];
3203 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3204 if (++scrq->cur == scrq->size)
3205 scrq->cur = 0;
3206 } else {
3207 entry = NULL;
3208 }
3209 spin_unlock_irqrestore(&scrq->lock, flags);
3210
3211 return entry;
3212}
3213
3214static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3215{
3216 struct ibmvnic_crq_queue *queue = &adapter->crq;
3217 union ibmvnic_crq *crq;
3218
3219 crq = &queue->msgs[queue->cur];
3220 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3221 if (++queue->cur == queue->size)
3222 queue->cur = 0;
3223 } else {
3224 crq = NULL;
3225 }
3226
3227 return crq;
3228}
3229
2d14d379
TF		 3230static void print_subcrq_error(struct device *dev, int rc, const char *func)
3231{
3232 switch (rc) {
3233 case H_PARAMETER:
3234 dev_warn_ratelimited(dev,
3235 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3236 func, rc);
3237 break;
3238 case H_CLOSED:
3239 dev_warn_ratelimited(dev,
3240 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3241 func, rc);
3242 break;
3243 default:
3244 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3245 break;
3246 }
3247}
3248
032c5e82
TF		 3249static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3250 union sub_crq *sub_crq)
3251{
3252 unsigned int ua = adapter->vdev->unit_address;
3253 struct device *dev = &adapter->vdev->dev;
3254 u64 *u64_crq = (u64 *)sub_crq;
3255 int rc;
3256
3257 netdev_dbg(adapter->netdev,
3258 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3259 (unsigned long int)cpu_to_be64(remote_handle),
3260 (unsigned long int)cpu_to_be64(u64_crq[0]),
3261 (unsigned long int)cpu_to_be64(u64_crq[1]),
3262 (unsigned long int)cpu_to_be64(u64_crq[2]),
3263 (unsigned long int)cpu_to_be64(u64_crq[3]));
3264
3265 /* Make sure the hypervisor sees the complete request */
3266 mb();
3267
3268 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3269 cpu_to_be64(remote_handle),
3270 cpu_to_be64(u64_crq[0]),
3271 cpu_to_be64(u64_crq[1]),
3272 cpu_to_be64(u64_crq[2]),
3273 cpu_to_be64(u64_crq[3]));
3274
2d14d379
TF		 3275 if (rc)
3276 print_subcrq_error(dev, rc, __func__);
032c5e82
TF		 3277
3278 return rc;
3279}
3280
ad7775dc
TF		 3281static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3282 u64 remote_handle, u64 ioba, u64 num_entries)
3283{
3284 unsigned int ua = adapter->vdev->unit_address;
3285 struct device *dev = &adapter->vdev->dev;
3286 int rc;
3287
3288 /* Make sure the hypervisor sees the complete request */
3289 mb();
3290 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3291 cpu_to_be64(remote_handle),
3292 ioba, num_entries);
3293
2d14d379
TF		 3294 if (rc)
3295 print_subcrq_error(dev, rc, __func__);
ad7775dc
TF		 3296
3297 return rc;
3298}
3299
032c5e82
TF		 3300static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3301 union ibmvnic_crq *crq)
3302{
3303 unsigned int ua = adapter->vdev->unit_address;
3304 struct device *dev = &adapter->vdev->dev;
3305 u64 *u64_crq = (u64 *)crq;
3306 int rc;
3307
3308 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3309 (unsigned long int)cpu_to_be64(u64_crq[0]),
3310 (unsigned long int)cpu_to_be64(u64_crq[1]));
3311
5153698e
TF		 3312 if (!adapter->crq.active &&
3313 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3314 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3315 return -EINVAL;
3316 }
3317
032c5e82
TF		 3318 /* Make sure the hypervisor sees the complete request */
3319 mb();
3320
3321 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3322 cpu_to_be64(u64_crq[0]),
3323 cpu_to_be64(u64_crq[1]));
3324
3325 if (rc) {
ec95dffa 3326 if (rc == H_CLOSED) {
032c5e82 3327 dev_warn(dev, "CRQ Queue closed\n");
ec95dffa
NF		 3328 if (adapter->resetting)
3329 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3330 }
3331
032c5e82
TF		 3332 dev_warn(dev, "Send error (rc=%d)\n", rc);
3333 }
3334
3335 return rc;
3336}
3337
3338static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3339{
3340 union ibmvnic_crq crq;
3341
3342 memset(&crq, 0, sizeof(crq));
3343 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3344 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3345 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3346
3347 return ibmvnic_send_crq(adapter, &crq);
3348}
3349
032c5e82
TF		 3350static int send_version_xchg(struct ibmvnic_adapter *adapter)
3351{
3352 union ibmvnic_crq crq;
3353
3354 memset(&crq, 0, sizeof(crq));
3355 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3356 crq.version_exchange.cmd = VERSION_EXCHANGE;
3357 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3358
3359 return ibmvnic_send_crq(adapter, &crq);
3360}
3361
37798d02
NF		 3362struct vnic_login_client_data {
3363 u8 type;
3364 __be16 len;
08ea556e 3365 char name[];
37798d02
NF		 3366} __packed;
3367
3368static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3369{
3370 int len;
3371
3372 /* Calculate the amount of buffer space needed for the
3373 * vnic client data in the login buffer. There are four entries,
3374 * OS name, LPAR name, device name, and a null last entry.
3375 */
3376 len = 4 * sizeof(struct vnic_login_client_data);
3377 len += 6; /* "Linux" plus NULL */
3378 len += strlen(utsname()->nodename) + 1;
3379 len += strlen(adapter->netdev->name) + 1;
3380
3381 return len;
3382}
3383
3384static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3385 struct vnic_login_client_data *vlcd)
3386{
3387 const char *os_name = "Linux";
3388 int len;
3389
3390 /* Type 1 - LPAR OS */
3391 vlcd->type = 1;
3392 len = strlen(os_name) + 1;
3393 vlcd->len = cpu_to_be16(len);
08ea556e
KC		 3394 strncpy(vlcd->name, os_name, len);
3395 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
37798d02
NF		 3396
3397 /* Type 2 - LPAR name */
3398 vlcd->type = 2;
3399 len = strlen(utsname()->nodename) + 1;
3400 vlcd->len = cpu_to_be16(len);
08ea556e
KC		 3401 strncpy(vlcd->name, utsname()->nodename, len);
3402 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
37798d02
NF		 3403
3404 /* Type 3 - device name */
3405 vlcd->type = 3;
3406 len = strlen(adapter->netdev->name) + 1;
3407 vlcd->len = cpu_to_be16(len);
08ea556e 3408 strncpy(vlcd->name, adapter->netdev->name, len);
37798d02
NF		 3409}
3410
20a8ab74 3411static int send_login(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3412{
3413 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3414 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 3415 struct device *dev = &adapter->vdev->dev;
3416 dma_addr_t rsp_buffer_token;
3417 dma_addr_t buffer_token;
3418 size_t rsp_buffer_size;
3419 union ibmvnic_crq crq;
032c5e82
TF		 3420 size_t buffer_size;
3421 __be64 *tx_list_p;
3422 __be64 *rx_list_p;
37798d02
NF		 3423 int client_data_len;
3424 struct vnic_login_client_data *vlcd;
032c5e82
TF		 3425 int i;
3426
20a8ab74
TF		 3427 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3428 netdev_err(adapter->netdev,
3429 "RX or TX queues are not allocated, device login failed\n");
3430 return -1;
3431 }
3432
34f0f4e3 3433 release_login_rsp_buffer(adapter);
37798d02
NF		 3434 client_data_len = vnic_client_data_len(adapter);
3435
032c5e82
TF		 3436 buffer_size =
3437 sizeof(struct ibmvnic_login_buffer) +
37798d02
NF		 3438 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3439 client_data_len;
032c5e82 3440
37798d02 3441 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
032c5e82
TF		 3442 if (!login_buffer)
3443 goto buf_alloc_failed;
3444
3445 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3446 DMA_TO_DEVICE);
3447 if (dma_mapping_error(dev, buffer_token)) {
3448 dev_err(dev, "Couldn't map login buffer\n");
3449 goto buf_map_failed;
3450 }
3451
498cd8e4
JA		 3452 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3453 sizeof(u64) * adapter->req_tx_queues +
3454 sizeof(u64) * adapter->req_rx_queues +
3455 sizeof(u64) * adapter->req_rx_queues +
3456 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 3457
3458 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3459 if (!login_rsp_buffer)
3460 goto buf_rsp_alloc_failed;
3461
3462 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3463 rsp_buffer_size, DMA_FROM_DEVICE);
3464 if (dma_mapping_error(dev, rsp_buffer_token)) {
3465 dev_err(dev, "Couldn't map login rsp buffer\n");
3466 goto buf_rsp_map_failed;
3467 }
661a2622 3468
032c5e82
TF		 3469 adapter->login_buf = login_buffer;
3470 adapter->login_buf_token = buffer_token;
3471 adapter->login_buf_sz = buffer_size;
3472 adapter->login_rsp_buf = login_rsp_buffer;
3473 adapter->login_rsp_buf_token = rsp_buffer_token;
3474 adapter->login_rsp_buf_sz = rsp_buffer_size;
3475
3476 login_buffer->len = cpu_to_be32(buffer_size);
3477 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3478 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3479 login_buffer->off_txcomp_subcrqs =
3480 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3481 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3482 login_buffer->off_rxcomp_subcrqs =
3483 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3484 sizeof(u64) * adapter->req_tx_queues);
3485 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3486 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3487
3488 tx_list_p = (__be64 *)((char *)login_buffer +
3489 sizeof(struct ibmvnic_login_buffer));
3490 rx_list_p = (__be64 *)((char *)login_buffer +
3491 sizeof(struct ibmvnic_login_buffer) +
3492 sizeof(u64) * adapter->req_tx_queues);
3493
3494 for (i = 0; i < adapter->req_tx_queues; i++) {
3495 if (adapter->tx_scrq[i]) {
3496 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3497 crq_num);
3498 }
3499 }
3500
3501 for (i = 0; i < adapter->req_rx_queues; i++) {
3502 if (adapter->rx_scrq[i]) {
3503 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3504 crq_num);
3505 }
3506 }
3507
37798d02
NF		 3508 /* Insert vNIC login client data */
3509 vlcd = (struct vnic_login_client_data *)
3510 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3511 login_buffer->client_data_offset =
3512 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3513 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3514
3515 vnic_add_client_data(adapter, vlcd);
3516
032c5e82
TF		 3517 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3518 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3519 netdev_dbg(adapter->netdev, "%016lx\n",
3520 ((unsigned long int *)(adapter->login_buf))[i]);
3521 }
3522
3523 memset(&crq, 0, sizeof(crq));
3524 crq.login.first = IBMVNIC_CRQ_CMD;
3525 crq.login.cmd = LOGIN;
3526 crq.login.ioba = cpu_to_be32(buffer_token);
3527 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 3528 ibmvnic_send_crq(adapter, &crq);
3529
20a8ab74 3530 return 0;
032c5e82 3531
032c5e82
TF		 3532buf_rsp_map_failed:
3533 kfree(login_rsp_buffer);
3534buf_rsp_alloc_failed:
3535 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3536buf_map_failed:
3537 kfree(login_buffer);
3538buf_alloc_failed:
20a8ab74 3539 return -1;
032c5e82
TF		 3540}
3541
9c4eaabd
TF		 3542static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3543 u32 len, u8 map_id)
032c5e82
TF		 3544{
3545 union ibmvnic_crq crq;
3546
3547 memset(&crq, 0, sizeof(crq));
3548 crq.request_map.first = IBMVNIC_CRQ_CMD;
3549 crq.request_map.cmd = REQUEST_MAP;
3550 crq.request_map.map_id = map_id;
3551 crq.request_map.ioba = cpu_to_be32(addr);
3552 crq.request_map.len = cpu_to_be32(len);
9c4eaabd 3553 return ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 3554}
3555
9c4eaabd 3556static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
032c5e82
TF		 3557{
3558 union ibmvnic_crq crq;
3559
3560 memset(&crq, 0, sizeof(crq));
3561 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3562 crq.request_unmap.cmd = REQUEST_UNMAP;
3563 crq.request_unmap.map_id = map_id;
9c4eaabd 3564 return ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 3565}
3566
3567static void send_map_query(struct ibmvnic_adapter *adapter)
3568{
3569 union ibmvnic_crq crq;
3570
3571 memset(&crq, 0, sizeof(crq));
3572 crq.query_map.first = IBMVNIC_CRQ_CMD;
3573 crq.query_map.cmd = QUERY_MAP;
3574 ibmvnic_send_crq(adapter, &crq);
3575}
3576
3577/* Send a series of CRQs requesting various capabilities of the VNIC server */
3578static void send_cap_queries(struct ibmvnic_adapter *adapter)
3579{
3580 union ibmvnic_crq crq;
3581
901e040a 3582 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 3583 memset(&crq, 0, sizeof(crq));
3584 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3585 crq.query_capability.cmd = QUERY_CAPABILITY;
3586
3587 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 3588 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3589 ibmvnic_send_crq(adapter, &crq);
3590
3591 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 3592 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3593 ibmvnic_send_crq(adapter, &crq);
3594
3595 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 3596 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3597 ibmvnic_send_crq(adapter, &crq);
3598
3599 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 3600 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3601 ibmvnic_send_crq(adapter, &crq);
3602
3603 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 3604 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3605 ibmvnic_send_crq(adapter, &crq);
3606
3607 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 3608 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3609 ibmvnic_send_crq(adapter, &crq);
3610
3611 crq.query_capability.capability =
3612 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 3613 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3614 ibmvnic_send_crq(adapter, &crq);
3615
3616 crq.query_capability.capability =
3617 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3618 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3619 ibmvnic_send_crq(adapter, &crq);
3620
3621 crq.query_capability.capability =
3622 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 3623 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3624 ibmvnic_send_crq(adapter, &crq);
3625
3626 crq.query_capability.capability =
3627 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3628 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3629 ibmvnic_send_crq(adapter, &crq);
3630
3631 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 3632 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3633 ibmvnic_send_crq(adapter, &crq);
3634
3635 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 3636 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3637 ibmvnic_send_crq(adapter, &crq);
3638
3639 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 3640 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3641 ibmvnic_send_crq(adapter, &crq);
3642
3643 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 3644 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3645 ibmvnic_send_crq(adapter, &crq);
3646
3647 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 3648 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3649 ibmvnic_send_crq(adapter, &crq);
3650
3651 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 3652 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3653 ibmvnic_send_crq(adapter, &crq);
3654
6052d5e2
MFV		 3655 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3656 atomic_inc(&adapter->running_cap_crqs);
3657 ibmvnic_send_crq(adapter, &crq);
3658
032c5e82 3659 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 3660 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3661 ibmvnic_send_crq(adapter, &crq);
3662
3663 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 3664 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3665 ibmvnic_send_crq(adapter, &crq);
3666
3667 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 3668 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3669 ibmvnic_send_crq(adapter, &crq);
3670
3671 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 3672 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3673 ibmvnic_send_crq(adapter, &crq);
3674
3675 crq.query_capability.capability =
3676 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 3677 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3678 ibmvnic_send_crq(adapter, &crq);
3679
3680 crq.query_capability.capability =
3681 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 3682 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3683 ibmvnic_send_crq(adapter, &crq);
3684
3685 crq.query_capability.capability =
3686 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 3687 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3688 ibmvnic_send_crq(adapter, &crq);
3689
3690 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 3691 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3692 ibmvnic_send_crq(adapter, &crq);
3693}
3694
4e6759be
DANR		 3695static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3696 struct ibmvnic_adapter *adapter)
3697{
3698 struct device *dev = &adapter->vdev->dev;
3699
3700 if (crq->get_vpd_size_rsp.rc.code) {
3701 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3702 crq->get_vpd_size_rsp.rc.code);
3703 complete(&adapter->fw_done);
3704 return;
3705 }
3706
3707 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3708 complete(&adapter->fw_done);
3709}
3710
3711static void handle_vpd_rsp(union ibmvnic_crq *crq,
3712 struct ibmvnic_adapter *adapter)
3713{
3714 struct device *dev = &adapter->vdev->dev;
21a2545b 3715 unsigned char *substr = NULL;
4e6759be
DANR		 3716 u8 fw_level_len = 0;
3717
3718 memset(adapter->fw_version, 0, 32);
3719
3720 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3721 DMA_FROM_DEVICE);
3722
3723 if (crq->get_vpd_rsp.rc.code) {
3724 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3725 crq->get_vpd_rsp.rc.code);
3726 goto complete;
3727 }
3728
3729 /* get the position of the firmware version info
3730 * located after the ASCII 'RM' substring in the buffer
3731 */
3732 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3733 if (!substr) {
a107311d 3734 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4e6759be
DANR		 3735 goto complete;
3736 }
3737
3738 /* get length of firmware level ASCII substring */
3739 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3740 fw_level_len = *(substr + 2);
3741 } else {
3742 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3743 goto complete;
3744 }
3745
3746 /* copy firmware version string from vpd into adapter */
3747 if ((substr + 3 + fw_level_len) <
3748 (adapter->vpd->buff + adapter->vpd->len)) {
21a2545b 3749 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4e6759be
DANR		 3750 } else {
3751 dev_info(dev, "FW substr extrapolated VPD buff\n");
3752 }
3753
3754complete:
21a2545b
DANR		 3755 if (adapter->fw_version[0] == '\0')
3756 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4e6759be
DANR		 3757 complete(&adapter->fw_done);
3758}
3759
032c5e82
TF		 3760static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3761{
3762 struct device *dev = &adapter->vdev->dev;
3763 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3764 union ibmvnic_crq crq;
3765 int i;
3766
3767 dma_unmap_single(dev, adapter->ip_offload_tok,
3768 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3769
3770 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3771 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3772 netdev_dbg(adapter->netdev, "%016lx\n",
3773 ((unsigned long int *)(buf))[i]);
3774
3775 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3776 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3777 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3778 buf->tcp_ipv4_chksum);
3779 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3780 buf->tcp_ipv6_chksum);
3781 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3782 buf->udp_ipv4_chksum);
3783 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3784 buf->udp_ipv6_chksum);
3785 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3786 buf->large_tx_ipv4);
3787 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3788 buf->large_tx_ipv6);
3789 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3790 buf->large_rx_ipv4);
3791 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3792 buf->large_rx_ipv6);
3793 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3794 buf->max_ipv4_header_size);
3795 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3796 buf->max_ipv6_header_size);
3797 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3798 buf->max_tcp_header_size);
3799 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3800 buf->max_udp_header_size);
3801 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3802 buf->max_large_tx_size);
3803 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3804 buf->max_large_rx_size);
3805 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3806 buf->ipv6_extension_header);
3807 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3808 buf->tcp_pseudosum_req);
3809 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3810 buf->num_ipv6_ext_headers);
3811 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3812 buf->off_ipv6_ext_headers);
3813
3814 adapter->ip_offload_ctrl_tok =
3815 dma_map_single(dev, &adapter->ip_offload_ctrl,
3816 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3817
3818 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3819 dev_err(dev, "Couldn't map ip offload control buffer\n");
3820 return;
3821 }
3822
f6897943
TF		 3823 adapter->ip_offload_ctrl.len =
3824 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
032c5e82 3825 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
f6897943
TF		 3826 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3827 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
032c5e82
TF		 3828 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3829 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3830 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3831 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
fdb06105
TF		 3832 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3833 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
032c5e82 3834
fdb06105 3835 /* large_rx disabled for now, additional features needed */
032c5e82
TF		 3836 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3837 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3838
15482056 3839 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
032c5e82
TF		 3840
3841 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3842 adapter->netdev->features |= NETIF_F_IP_CSUM;
3843
3844 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3845 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3846
9be02cdf
TF		 3847 if ((adapter->netdev->features &
3848 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3849 adapter->netdev->features |= NETIF_F_RXCSUM;
3850
fdb06105
TF		 3851 if (buf->large_tx_ipv4)
3852 adapter->netdev->features |= NETIF_F_TSO;
3853 if (buf->large_tx_ipv6)
3854 adapter->netdev->features |= NETIF_F_TSO6;
3855
aa0bf851
TF		 3856 adapter->netdev->hw_features |= adapter->netdev->features;
3857
032c5e82
TF		 3858 memset(&crq, 0, sizeof(crq));
3859 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3860 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3861 crq.control_ip_offload.len =
3862 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3863 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3864 ibmvnic_send_crq(adapter, &crq);
3865}
3866
c9008d33
TF		 3867static const char *ibmvnic_fw_err_cause(u16 cause)
3868{
3869 switch (cause) {
3870 case ADAPTER_PROBLEM:
3871 return "adapter problem";
3872 case BUS_PROBLEM:
3873 return "bus problem";
3874 case FW_PROBLEM:
3875 return "firmware problem";
3876 case DD_PROBLEM:
3877 return "device driver problem";
3878 case EEH_RECOVERY:
3879 return "EEH recovery";
3880 case FW_UPDATED:
3881 return "firmware updated";
3882 case LOW_MEMORY:
3883 return "low Memory";
3884 default:
3885 return "unknown";
3886 }
3887}
3888
2f9de9ba
NF		 3889static void handle_error_indication(union ibmvnic_crq *crq,
3890 struct ibmvnic_adapter *adapter)
3891{
3892 struct device *dev = &adapter->vdev->dev;
c9008d33
TF		 3893 u16 cause;
3894
3895 cause = be16_to_cpu(crq->error_indication.error_cause);
2f9de9ba 3896
c9008d33
TF		 3897 dev_warn_ratelimited(dev,
3898 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3899 crq->error_indication.flags
3900 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3901 ibmvnic_fw_err_cause(cause));
2f9de9ba 3902
ed651a10
NF		 3903 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3904 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 3905 else
3906 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 3907}
3908
f813614f
TF		 3909static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3910 struct ibmvnic_adapter *adapter)
032c5e82
TF		 3911{
3912 struct net_device *netdev = adapter->netdev;
3913 struct device *dev = &adapter->vdev->dev;
3914 long rc;
3915
3916 rc = crq->change_mac_addr_rsp.rc.code;
3917 if (rc) {
3918 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
f813614f 3919 goto out;
032c5e82
TF		 3920 }
3921 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3922 ETH_ALEN);
f813614f
TF		 3923out:
3924 complete(&adapter->fw_done);
3925 return rc;
032c5e82
TF		 3926}
3927
3928static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3929 struct ibmvnic_adapter *adapter)
3930{
3931 struct device *dev = &adapter->vdev->dev;
3932 u64 *req_value;
3933 char *name;
3934
901e040a 3935 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 3936 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3937 case REQ_TX_QUEUES:
3938 req_value = &adapter->req_tx_queues;
3939 name = "tx";
3940 break;
3941 case REQ_RX_QUEUES:
3942 req_value = &adapter->req_rx_queues;
3943 name = "rx";
3944 break;
3945 case REQ_RX_ADD_QUEUES:
3946 req_value = &adapter->req_rx_add_queues;
3947 name = "rx_add";
3948 break;
3949 case REQ_TX_ENTRIES_PER_SUBCRQ:
3950 req_value = &adapter->req_tx_entries_per_subcrq;
3951 name = "tx_entries_per_subcrq";
3952 break;
3953 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3954 req_value = &adapter->req_rx_add_entries_per_subcrq;
3955 name = "rx_add_entries_per_subcrq";
3956 break;
3957 case REQ_MTU:
3958 req_value = &adapter->req_mtu;
3959 name = "mtu";
3960 break;
3961 case PROMISC_REQUESTED:
3962 req_value = &adapter->promisc;
3963 name = "promisc";
3964 break;
3965 default:
3966 dev_err(dev, "Got invalid cap request rsp %d\n",
3967 crq->request_capability.capability);
3968 return;
3969 }
3970
3971 switch (crq->request_capability_rsp.rc.code) {
3972 case SUCCESS:
3973 break;
3974 case PARTIALSUCCESS:
3975 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3976 *req_value,
28f4d165 3977 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 3978 number), name);
e7913803
JA		 3979
3980 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3981 REQ_MTU) {
3982 pr_err("mtu of %llu is not supported. Reverting.\n",
3983 *req_value);
3984 *req_value = adapter->fallback.mtu;
3985 } else {
3986 *req_value =
3987 be64_to_cpu(crq->request_capability_rsp.number);
3988 }
3989
d346b9bc 3990 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 3991 return;
3992 default:
3993 dev_err(dev, "Error %d in request cap rsp\n",
3994 crq->request_capability_rsp.rc.code);
3995 return;
3996 }
3997
3998 /* Done receiving requested capabilities, query IP offload support */
901e040a 3999 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 4000 union ibmvnic_crq newcrq;
4001 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4002 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4003 &adapter->ip_offload_buf;
4004
249168ad 4005 adapter->wait_capability = false;
032c5e82
TF		 4006 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4007 buf_sz,
4008 DMA_FROM_DEVICE);
4009
4010 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4011 if (!firmware_has_feature(FW_FEATURE_CMO))
4012 dev_err(dev, "Couldn't map offload buffer\n");
4013 return;
4014 }
4015
4016 memset(&newcrq, 0, sizeof(newcrq));
4017 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4018 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4019 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4020 newcrq.query_ip_offload.ioba =
4021 cpu_to_be32(adapter->ip_offload_tok);
4022
4023 ibmvnic_send_crq(adapter, &newcrq);
4024 }
4025}
4026
4027static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4028 struct ibmvnic_adapter *adapter)
4029{
4030 struct device *dev = &adapter->vdev->dev;
c26eba03 4031 struct net_device *netdev = adapter->netdev;
032c5e82
TF		 4032 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4033 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 4034 int i;
4035
4036 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
37e40fa8 4037 DMA_TO_DEVICE);
032c5e82 4038 dma_unmap_single(dev, adapter->login_rsp_buf_token,
37e40fa8 4039 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
032c5e82 4040
498cd8e4
JA		 4041 /* If the number of queues requested can't be allocated by the
4042 * server, the login response will return with code 1. We will need
4043 * to resend the login buffer with fewer queues requested.
4044 */
4045 if (login_rsp_crq->generic.rc.code) {
64d92aa2 4046 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
498cd8e4
JA		 4047 complete(&adapter->init_done);
4048 return 0;
4049 }
4050
c26eba03
JA		 4051 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4052
032c5e82
TF		 4053 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4054 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4055 netdev_dbg(adapter->netdev, "%016lx\n",
4056 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4057 }
4058
4059 /* Sanity checks */
4060 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4061 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4062 adapter->req_rx_add_queues !=
4063 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4064 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4065 ibmvnic_remove(adapter->vdev);
4066 return -EIO;
4067 }
a2c0f039 4068 release_login_buffer(adapter);
032c5e82
TF		 4069 complete(&adapter->init_done);
4070
032c5e82
TF		 4071 return 0;
4072}
4073
032c5e82
TF		 4074static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4075 struct ibmvnic_adapter *adapter)
4076{
4077 struct device *dev = &adapter->vdev->dev;
4078 long rc;
4079
4080 rc = crq->request_unmap_rsp.rc.code;
4081 if (rc)
4082 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4083}
4084
4085static void handle_query_map_rsp(union ibmvnic_crq *crq,
4086 struct ibmvnic_adapter *adapter)
4087{
4088 struct net_device *netdev = adapter->netdev;
4089 struct device *dev = &adapter->vdev->dev;
4090 long rc;
4091
4092 rc = crq->query_map_rsp.rc.code;
4093 if (rc) {
4094 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4095 return;
4096 }
4097 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4098 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4099 crq->query_map_rsp.free_pages);
4100}
4101
4102static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4103 struct ibmvnic_adapter *adapter)
4104{
4105 struct net_device *netdev = adapter->netdev;
4106 struct device *dev = &adapter->vdev->dev;
4107 long rc;
4108
901e040a 4109 atomic_dec(&adapter->running_cap_crqs);
032c5e82 4110 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 4111 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 4112 rc = crq->query_capability.rc.code;
4113 if (rc) {
4114 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4115 goto out;
4116 }
4117
4118 switch (be16_to_cpu(crq->query_capability.capability)) {
4119 case MIN_TX_QUEUES:
4120 adapter->min_tx_queues =
de89e854 4121 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4122 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4123 adapter->min_tx_queues);
4124 break;
4125 case MIN_RX_QUEUES:
4126 adapter->min_rx_queues =
de89e854 4127 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4128 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4129 adapter->min_rx_queues);
4130 break;
4131 case MIN_RX_ADD_QUEUES:
4132 adapter->min_rx_add_queues =
de89e854 4133 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4134 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4135 adapter->min_rx_add_queues);
4136 break;
4137 case MAX_TX_QUEUES:
4138 adapter->max_tx_queues =
de89e854 4139 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4140 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4141 adapter->max_tx_queues);
4142 break;
4143 case MAX_RX_QUEUES:
4144 adapter->max_rx_queues =
de89e854 4145 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4146 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4147 adapter->max_rx_queues);
4148 break;
4149 case MAX_RX_ADD_QUEUES:
4150 adapter->max_rx_add_queues =
de89e854 4151 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4152 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4153 adapter->max_rx_add_queues);
4154 break;
4155 case MIN_TX_ENTRIES_PER_SUBCRQ:
4156 adapter->min_tx_entries_per_subcrq =
de89e854 4157 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4158 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4159 adapter->min_tx_entries_per_subcrq);
4160 break;
4161 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4162 adapter->min_rx_add_entries_per_subcrq =
de89e854 4163 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4164 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4165 adapter->min_rx_add_entries_per_subcrq);
4166 break;
4167 case MAX_TX_ENTRIES_PER_SUBCRQ:
4168 adapter->max_tx_entries_per_subcrq =
de89e854 4169 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4170 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4171 adapter->max_tx_entries_per_subcrq);
4172 break;
4173 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4174 adapter->max_rx_add_entries_per_subcrq =
de89e854 4175 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4176 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4177 adapter->max_rx_add_entries_per_subcrq);
4178 break;
4179 case TCP_IP_OFFLOAD:
4180 adapter->tcp_ip_offload =
de89e854 4181 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4182 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4183 adapter->tcp_ip_offload);
4184 break;
4185 case PROMISC_SUPPORTED:
4186 adapter->promisc_supported =
de89e854 4187 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4188 netdev_dbg(netdev, "promisc_supported = %lld\n",
4189 adapter->promisc_supported);
4190 break;
4191 case MIN_MTU:
de89e854 4192 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 4193 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 4194 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4195 break;
4196 case MAX_MTU:
de89e854 4197 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 4198 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 4199 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4200 break;
4201 case MAX_MULTICAST_FILTERS:
4202 adapter->max_multicast_filters =
de89e854 4203 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4204 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4205 adapter->max_multicast_filters);
4206 break;
4207 case VLAN_HEADER_INSERTION:
4208 adapter->vlan_header_insertion =
de89e854 4209 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4210 if (adapter->vlan_header_insertion)
4211 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4212 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4213 adapter->vlan_header_insertion);
4214 break;
6052d5e2
MFV		 4215 case RX_VLAN_HEADER_INSERTION:
4216 adapter->rx_vlan_header_insertion =
4217 be64_to_cpu(crq->query_capability.number);
4218 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4219 adapter->rx_vlan_header_insertion);
4220 break;
032c5e82
TF		 4221 case MAX_TX_SG_ENTRIES:
4222 adapter->max_tx_sg_entries =
de89e854 4223 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4224 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4225 adapter->max_tx_sg_entries);
4226 break;
4227 case RX_SG_SUPPORTED:
4228 adapter->rx_sg_supported =
de89e854 4229 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4230 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4231 adapter->rx_sg_supported);
4232 break;
4233 case OPT_TX_COMP_SUB_QUEUES:
4234 adapter->opt_tx_comp_sub_queues =
de89e854 4235 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4236 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4237 adapter->opt_tx_comp_sub_queues);
4238 break;
4239 case OPT_RX_COMP_QUEUES:
4240 adapter->opt_rx_comp_queues =
de89e854 4241 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4242 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4243 adapter->opt_rx_comp_queues);
4244 break;
4245 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4246 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 4247 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4248 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4249 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4250 break;
4251 case OPT_TX_ENTRIES_PER_SUBCRQ:
4252 adapter->opt_tx_entries_per_subcrq =
de89e854 4253 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4254 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4255 adapter->opt_tx_entries_per_subcrq);
4256 break;
4257 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4258 adapter->opt_rxba_entries_per_subcrq =
de89e854 4259 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 4260 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4261 adapter->opt_rxba_entries_per_subcrq);
4262 break;
4263 case TX_RX_DESC_REQ:
4264 adapter->tx_rx_desc_req = crq->query_capability.number;
4265 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4266 adapter->tx_rx_desc_req);
4267 break;
4268
4269 default:
4270 netdev_err(netdev, "Got invalid cap rsp %d\n",
4271 crq->query_capability.capability);
4272 }
4273
4274out:
249168ad
TF		 4275 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4276 adapter->wait_capability = false;
d346b9bc 4277 ibmvnic_send_req_caps(adapter, 0);
249168ad 4278 }
032c5e82
TF		 4279}
4280
032c5e82
TF		 4281static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4282 struct ibmvnic_adapter *adapter)
4283{
4284 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4285 struct net_device *netdev = adapter->netdev;
4286 struct device *dev = &adapter->vdev->dev;
993a82b0 4287 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 4288 long rc;
4289
4290 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 4291 (unsigned long int)cpu_to_be64(u64_crq[0]),
4292 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 4293 switch (gen_crq->first) {
4294 case IBMVNIC_CRQ_INIT_RSP:
4295 switch (gen_crq->cmd) {
4296 case IBMVNIC_CRQ_INIT:
4297 dev_info(dev, "Partner initialized\n");
017892c1 4298 adapter->from_passive_init = true;
5a18e1e0 4299 adapter->failover_pending = false;
17c87058
TF		 4300 if (!completion_done(&adapter->init_done)) {
4301 complete(&adapter->init_done);
4302 adapter->init_done_rc = -EIO;
4303 }
5a18e1e0 4304 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 4305 break;
4306 case IBMVNIC_CRQ_INIT_COMPLETE:
4307 dev_info(dev, "Partner initialization complete\n");
5153698e 4308 adapter->crq.active = true;
032c5e82
TF		 4309 send_version_xchg(adapter);
4310 break;
4311 default:
4312 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4313 }
4314 return;
4315 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 4316 netif_carrier_off(netdev);
5153698e 4317 adapter->crq.active = false;
2770a798
TF		 4318 if (adapter->resetting)
4319 adapter->force_reset_recovery = true;
032c5e82 4320 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 4321 dev_info(dev, "Migrated, re-enabling adapter\n");
4322 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 4323 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4324 dev_info(dev, "Backing device failover detected\n");
5a18e1e0 4325 adapter->failover_pending = true;
032c5e82
TF		 4326 } else {
4327 /* The adapter lost the connection */
4328 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4329 gen_crq->cmd);
ed651a10 4330 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 4331 }
4332 return;
4333 case IBMVNIC_CRQ_CMD_RSP:
4334 break;
4335 default:
4336 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4337 gen_crq->first);
4338 return;
4339 }
4340
4341 switch (gen_crq->cmd) {
4342 case VERSION_EXCHANGE_RSP:
4343 rc = crq->version_exchange_rsp.rc.code;
4344 if (rc) {
4345 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4346 break;
4347 }
4348 dev_info(dev, "Partner protocol version is %d\n",
4349 crq->version_exchange_rsp.version);
4350 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4351 ibmvnic_version)
4352 ibmvnic_version =
4353 be16_to_cpu(crq->version_exchange_rsp.version);
4354 send_cap_queries(adapter);
4355 break;
4356 case QUERY_CAPABILITY_RSP:
4357 handle_query_cap_rsp(crq, adapter);
4358 break;
4359 case QUERY_MAP_RSP:
4360 handle_query_map_rsp(crq, adapter);
4361 break;
4362 case REQUEST_MAP_RSP:
f3be0cbc
TF		 4363 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4364 complete(&adapter->fw_done);
032c5e82
TF		 4365 break;
4366 case REQUEST_UNMAP_RSP:
4367 handle_request_unmap_rsp(crq, adapter);
4368 break;
4369 case REQUEST_CAPABILITY_RSP:
4370 handle_request_cap_rsp(crq, adapter);
4371 break;
4372 case LOGIN_RSP:
4373 netdev_dbg(netdev, "Got Login Response\n");
4374 handle_login_rsp(crq, adapter);
4375 break;
4376 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 4377 netdev_dbg(netdev,
4378 "Got Logical Link State Response, state: %d rc: %d\n",
4379 crq->logical_link_state_rsp.link_state,
4380 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 4381 adapter->logical_link_state =
4382 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 4383 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4384 complete(&adapter->init_done);
032c5e82
TF		 4385 break;
4386 case LINK_STATE_INDICATION:
4387 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4388 adapter->phys_link_state =
4389 crq->link_state_indication.phys_link_state;
4390 adapter->logical_link_state =
4391 crq->link_state_indication.logical_link_state;
4392 break;
4393 case CHANGE_MAC_ADDR_RSP:
4394 netdev_dbg(netdev, "Got MAC address change Response\n");
f813614f 4395 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
032c5e82
TF		 4396 break;
4397 case ERROR_INDICATION:
4398 netdev_dbg(netdev, "Got Error Indication\n");
4399 handle_error_indication(crq, adapter);
4400 break;
032c5e82
TF		 4401 case REQUEST_STATISTICS_RSP:
4402 netdev_dbg(netdev, "Got Statistics Response\n");
4403 complete(&adapter->stats_done);
4404 break;
032c5e82
TF		 4405 case QUERY_IP_OFFLOAD_RSP:
4406 netdev_dbg(netdev, "Got Query IP offload Response\n");
4407 handle_query_ip_offload_rsp(adapter);
4408 break;
4409 case MULTICAST_CTRL_RSP:
4410 netdev_dbg(netdev, "Got multicast control Response\n");
4411 break;
4412 case CONTROL_IP_OFFLOAD_RSP:
4413 netdev_dbg(netdev, "Got Control IP offload Response\n");
4414 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4415 sizeof(adapter->ip_offload_ctrl),
4416 DMA_TO_DEVICE);
bd0b6723 4417 complete(&adapter->init_done);
032c5e82 4418 break;
032c5e82
TF		 4419 case COLLECT_FW_TRACE_RSP:
4420 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4421 complete(&adapter->fw_done);
4422 break;
4e6759be
DANR		 4423 case GET_VPD_SIZE_RSP:
4424 handle_vpd_size_rsp(crq, adapter);
4425 break;
4426 case GET_VPD_RSP:
4427 handle_vpd_rsp(crq, adapter);
4428 break;
032c5e82
TF		 4429 default:
4430 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4431 gen_crq->cmd);
4432 }
4433}
4434
4435static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4436{
4437 struct ibmvnic_adapter *adapter = instance;
6c267b3d 4438
6c267b3d 4439 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 4440 return IRQ_HANDLED;
4441}
4442
4443static void ibmvnic_tasklet(void *data)
4444{
4445 struct ibmvnic_adapter *adapter = data;
032c5e82 4446 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 4447 union ibmvnic_crq *crq;
4448 unsigned long flags;
4449 bool done = false;
4450
4451 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 4452 while (!done) {
4453 /* Pull all the valid messages off the CRQ */
4454 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4455 ibmvnic_handle_crq(crq, adapter);
4456 crq->generic.first = 0;
4457 }
ed7ecbf7
BK		 4458
4459 /* remain in tasklet until all
4460 * capabilities responses are received
4461 */
4462 if (!adapter->wait_capability)
4463 done = true;
032c5e82 4464 }
249168ad
TF		 4465 /* if capabilities CRQ's were sent in this tasklet, the following
4466 * tasklet must wait until all responses are received
4467 */
4468 if (atomic_read(&adapter->running_cap_crqs) != 0)
4469 adapter->wait_capability = true;
032c5e82 4470 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 4471}
4472
4473static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4474{
4475 struct vio_dev *vdev = adapter->vdev;
4476 int rc;
4477
4478 do {
4479 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4480 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4481
4482 if (rc)
4483 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4484
4485 return rc;
4486}
4487
4488static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4489{
4490 struct ibmvnic_crq_queue *crq = &adapter->crq;
4491 struct device *dev = &adapter->vdev->dev;
4492 struct vio_dev *vdev = adapter->vdev;
4493 int rc;
4494
4495 /* Close the CRQ */
4496 do {
4497 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4498 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4499
4500 /* Clean out the queue */
4501 memset(crq->msgs, 0, PAGE_SIZE);
4502 crq->cur = 0;
5153698e 4503 crq->active = false;
032c5e82
TF		 4504
4505 /* And re-open it again */
4506 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4507 crq->msg_token, PAGE_SIZE);
4508
4509 if (rc == H_CLOSED)
4510 /* Adapter is good, but other end is not ready */
4511 dev_warn(dev, "Partner adapter not ready\n");
4512 else if (rc != 0)
4513 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4514
4515 return rc;
4516}
4517
f992887c 4518static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4519{
4520 struct ibmvnic_crq_queue *crq = &adapter->crq;
4521 struct vio_dev *vdev = adapter->vdev;
4522 long rc;
4523
f992887c
NF		 4524 if (!crq->msgs)
4525 return;
4526
032c5e82
TF		 4527 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4528 free_irq(vdev->irq, adapter);
6c267b3d 4529 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4530 do {
4531 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4532 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4533
4534 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4535 DMA_BIDIRECTIONAL);
4536 free_page((unsigned long)crq->msgs);
f992887c 4537 crq->msgs = NULL;
5153698e 4538 crq->active = false;
032c5e82
TF		 4539}
4540
f992887c 4541static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4542{
4543 struct ibmvnic_crq_queue *crq = &adapter->crq;
4544 struct device *dev = &adapter->vdev->dev;
4545 struct vio_dev *vdev = adapter->vdev;
4546 int rc, retrc = -ENOMEM;
4547
f992887c
NF		 4548 if (crq->msgs)
4549 return 0;
4550
032c5e82
TF		 4551 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4552 /* Should we allocate more than one page? */
4553
4554 if (!crq->msgs)
4555 return -ENOMEM;
4556
4557 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4558 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4559 DMA_BIDIRECTIONAL);
4560 if (dma_mapping_error(dev, crq->msg_token))
4561 goto map_failed;
4562
4563 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4564 crq->msg_token, PAGE_SIZE);
4565
4566 if (rc == H_RESOURCE)
4567 /* maybe kexecing and resource is busy. try a reset */
4568 rc = ibmvnic_reset_crq(adapter);
4569 retrc = rc;
4570
4571 if (rc == H_CLOSED) {
4572 dev_warn(dev, "Partner adapter not ready\n");
4573 } else if (rc) {
4574 dev_warn(dev, "Error %d opening adapter\n", rc);
4575 goto reg_crq_failed;
4576 }
4577
4578 retrc = 0;
4579
6c267b3d
TF		 4580 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4581 (unsigned long)adapter);
4582
032c5e82
TF		 4583 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4584 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4585 adapter);
4586 if (rc) {
4587 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4588 vdev->irq, rc);
4589 goto req_irq_failed;
4590 }
4591
4592 rc = vio_enable_interrupts(vdev);
4593 if (rc) {
4594 dev_err(dev, "Error %d enabling interrupts\n", rc);
4595 goto req_irq_failed;
4596 }
4597
4598 crq->cur = 0;
4599 spin_lock_init(&crq->lock);
4600
4601 return retrc;
4602
4603req_irq_failed:
6c267b3d 4604 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4605 do {
4606 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4607 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4608reg_crq_failed:
4609 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4610map_failed:
4611 free_page((unsigned long)crq->msgs);
f992887c 4612 crq->msgs = NULL;
032c5e82
TF		 4613 return retrc;
4614}
4615
8a348450 4616static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
032c5e82 4617{
f6ef6408 4618 struct device *dev = &adapter->vdev->dev;
ea22d51a 4619 unsigned long timeout = msecs_to_jiffies(30000);
d7c0ef36 4620 u64 old_num_rx_queues, old_num_tx_queues;
f6ef6408
JA		 4621 int rc;
4622
017892c1
JA		 4623 adapter->from_passive_init = false;
4624
d7c0ef36
NF		 4625 old_num_rx_queues = adapter->req_rx_queues;
4626 old_num_tx_queues = adapter->req_tx_queues;
4627
f6ef6408 4628 init_completion(&adapter->init_done);
6a2fb0e9 4629 adapter->init_done_rc = 0;
f6ef6408
JA		 4630 ibmvnic_send_crq_init(adapter);
4631 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4632 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 4633 return -1;
4634 }
4635
6a2fb0e9
NF		 4636 if (adapter->init_done_rc) {
4637 release_crq_queue(adapter);
4638 return adapter->init_done_rc;
4639 }
4640
017892c1
JA		 4641 if (adapter->from_passive_init) {
4642 adapter->state = VNIC_OPEN;
4643 adapter->from_passive_init = false;
f6ef6408
JA		 4644 return -1;
4645 }
4646
30f79625
NF		 4647 if (adapter->resetting && !adapter->wait_for_reset &&
4648 adapter->reset_reason != VNIC_RESET_MOBILITY) {
d7c0ef36
NF		 4649 if (adapter->req_rx_queues != old_num_rx_queues ||
4650 adapter->req_tx_queues != old_num_tx_queues) {
4651 release_sub_crqs(adapter, 0);
4652 rc = init_sub_crqs(adapter);
4653 } else {
4654 rc = reset_sub_crq_queues(adapter);
4655 }
4656 } else {
57a49436 4657 rc = init_sub_crqs(adapter);
d7c0ef36
NF		 4658 }
4659
1bb3c739
NF		 4660 if (rc) {
4661 dev_err(dev, "Initialization of sub crqs failed\n");
4662 release_crq_queue(adapter);
5df969c3
TF		 4663 return rc;
4664 }
4665
4666 rc = init_sub_crq_irqs(adapter);
4667 if (rc) {
4668 dev_err(dev, "Failed to initialize sub crq irqs\n");
4669 release_crq_queue(adapter);
1bb3c739
NF		 4670 }
4671
4672 return rc;
f6ef6408
JA		 4673}
4674
8a348450
TF		 4675static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4676{
4677 struct device *dev = &adapter->vdev->dev;
4678 unsigned long timeout = msecs_to_jiffies(30000);
4679 int rc;
4680
4681 adapter->from_passive_init = false;
4682
4683 init_completion(&adapter->init_done);
4684 adapter->init_done_rc = 0;
4685 ibmvnic_send_crq_init(adapter);
4686 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4687 dev_err(dev, "Initialization sequence timed out\n");
4688 return -1;
4689 }
4690
4691 if (adapter->init_done_rc) {
4692 release_crq_queue(adapter);
4693 return adapter->init_done_rc;
4694 }
4695
4696 if (adapter->from_passive_init) {
4697 adapter->state = VNIC_OPEN;
4698 adapter->from_passive_init = false;
4699 return -1;
4700 }
4701
4702 rc = init_sub_crqs(adapter);
4703 if (rc) {
4704 dev_err(dev, "Initialization of sub crqs failed\n");
4705 release_crq_queue(adapter);
4706 return rc;
4707 }
4708
4709 rc = init_sub_crq_irqs(adapter);
4710 if (rc) {
4711 dev_err(dev, "Failed to initialize sub crq irqs\n");
4712 release_crq_queue(adapter);
4713 }
4714
4715 return rc;
4716}
4717
40c9db8a
TF		 4718static struct device_attribute dev_attr_failover;
4719
f6ef6408
JA		 4720static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4721{
032c5e82
TF		 4722 struct ibmvnic_adapter *adapter;
4723 struct net_device *netdev;
4724 unsigned char *mac_addr_p;
032c5e82
TF		 4725 int rc;
4726
4727 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4728 dev->unit_address);
4729
4730 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4731 VETH_MAC_ADDR, NULL);
4732 if (!mac_addr_p) {
4733 dev_err(&dev->dev,
4734 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4735 __FILE__, __LINE__);
4736 return 0;
4737 }
4738
4739 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
d45cc3a4 4740 IBMVNIC_MAX_QUEUES);
032c5e82
TF		 4741 if (!netdev)
4742 return -ENOMEM;
4743
4744 adapter = netdev_priv(netdev);
90c8014c 4745 adapter->state = VNIC_PROBING;
032c5e82
TF		 4746 dev_set_drvdata(&dev->dev, netdev);
4747 adapter->vdev = dev;
4748 adapter->netdev = netdev;
4749
4750 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4751 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4752 netdev->irq = dev->irq;
4753 netdev->netdev_ops = &ibmvnic_netdev_ops;
4754 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4755 SET_NETDEV_DEV(netdev, &dev->dev);
4756
4757 spin_lock_init(&adapter->stats_lock);
4758
ed651a10
NF		 4759 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4760 INIT_LIST_HEAD(&adapter->rwi_list);
6c5c7489 4761 spin_lock_init(&adapter->rwi_lock);
ed651a10
NF		 4762 adapter->resetting = false;
4763
c26eba03
JA		 4764 adapter->mac_change_pending = false;
4765
6a2fb0e9 4766 do {
30f79625
NF		 4767 rc = init_crq_queue(adapter);
4768 if (rc) {
4769 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4770 rc);
4771 goto ibmvnic_init_fail;
4772 }
4773
6a2fb0e9 4774 rc = ibmvnic_init(adapter);
7c1885ae
NF		 4775 if (rc && rc != EAGAIN)
4776 goto ibmvnic_init_fail;
6a2fb0e9 4777 } while (rc == EAGAIN);
032c5e82 4778
07184213
TF		 4779 rc = init_stats_buffers(adapter);
4780 if (rc)
4781 goto ibmvnic_init_fail;
4782
4783 rc = init_stats_token(adapter);
4784 if (rc)
4785 goto ibmvnic_stats_fail;
4786
f39f0d1e 4787 netdev->mtu = adapter->req_mtu - ETH_HLEN;
c26eba03
JA		 4788 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4789 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82 4790
40c9db8a 4791 rc = device_create_file(&dev->dev, &dev_attr_failover);
7c1885ae 4792 if (rc)
07184213 4793 goto ibmvnic_dev_file_err;
40c9db8a 4794
e876a8a7 4795 netif_carrier_off(netdev);
032c5e82
TF		 4796 rc = register_netdev(netdev);
4797 if (rc) {
4798 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
7c1885ae 4799 goto ibmvnic_register_fail;
032c5e82
TF		 4800 }
4801 dev_info(&dev->dev, "ibmvnic registered\n");
4802
90c8014c 4803 adapter->state = VNIC_PROBED;
c26eba03
JA		 4804
4805 adapter->wait_for_reset = false;
4806
032c5e82 4807 return 0;
7c1885ae
NF		 4808
4809ibmvnic_register_fail:
4810 device_remove_file(&dev->dev, &dev_attr_failover);
4811
07184213
TF		 4812ibmvnic_dev_file_err:
4813 release_stats_token(adapter);
4814
4815ibmvnic_stats_fail:
4816 release_stats_buffers(adapter);
4817
7c1885ae 4818ibmvnic_init_fail:
d7c0ef36 4819 release_sub_crqs(adapter, 1);
7c1885ae
NF		 4820 release_crq_queue(adapter);
4821 free_netdev(netdev);
4822
4823 return rc;
032c5e82
TF		 4824}
4825
4826static int ibmvnic_remove(struct vio_dev *dev)
4827{
4828 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 4829 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4830
90c8014c 4831 adapter->state = VNIC_REMOVING;
a5681e20
JK		 4832 rtnl_lock();
4833 unregister_netdevice(netdev);
37489055
NF		 4834
4835 release_resources(adapter);
d7c0ef36 4836 release_sub_crqs(adapter, 1);
37489055
NF		 4837 release_crq_queue(adapter);
4838
53cc7721
TF		 4839 release_stats_token(adapter);
4840 release_stats_buffers(adapter);
4841
90c8014c
NF		 4842 adapter->state = VNIC_REMOVED;
4843
a5681e20 4844 rtnl_unlock();
40c9db8a 4845 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 4846 free_netdev(netdev);
4847 dev_set_drvdata(&dev->dev, NULL);
4848
4849 return 0;
4850}
4851
40c9db8a
TF		 4852static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4853 const char *buf, size_t count)
4854{
4855 struct net_device *netdev = dev_get_drvdata(dev);
4856 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4857 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4858 __be64 session_token;
4859 long rc;
4860
4861 if (!sysfs_streq(buf, "1"))
4862 return -EINVAL;
4863
4864 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4865 H_GET_SESSION_TOKEN, 0, 0, 0);
4866 if (rc) {
4867 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4868 rc);
4869 return -EINVAL;
4870 }
4871
4872 session_token = (__be64)retbuf[0];
4873 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4874 be64_to_cpu(session_token));
4875 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4876 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4877 if (rc) {
4878 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4879 rc);
4880 return -EINVAL;
4881 }
4882
4883 return count;
4884}
4885
6cbaefb4 4886static DEVICE_ATTR_WO(failover);
40c9db8a 4887
032c5e82
TF		 4888static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4889{
4890 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4891 struct ibmvnic_adapter *adapter;
4892 struct iommu_table *tbl;
4893 unsigned long ret = 0;
4894 int i;
4895
4896 tbl = get_iommu_table_base(&vdev->dev);
4897
4898 /* netdev inits at probe time along with the structures we need below*/
4899 if (!netdev)
4900 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4901
4902 adapter = netdev_priv(netdev);
4903
4904 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 4905 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4906
4907 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4908 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4909
4910 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4911 i++)
4912 ret += adapter->rx_pool[i].size *
4913 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4914
4915 return ret;
4916}
4917
4918static int ibmvnic_resume(struct device *dev)
4919{
4920 struct net_device *netdev = dev_get_drvdata(dev);
4921 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4922
cb89ba24
JA		 4923 if (adapter->state != VNIC_OPEN)
4924 return 0;
4925
a248878d 4926 tasklet_schedule(&adapter->tasklet);
032c5e82
TF		 4927
4928 return 0;
4929}
4930
8c37bc67 4931static const struct vio_device_id ibmvnic_device_table[] = {
032c5e82
TF		 4932 {"network", "IBM,vnic"},
4933 {"", "" }
4934};
4935MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4936
4937static const struct dev_pm_ops ibmvnic_pm_ops = {
4938 .resume = ibmvnic_resume
4939};
4940
4941static struct vio_driver ibmvnic_driver = {
4942 .id_table = ibmvnic_device_table,
4943 .probe = ibmvnic_probe,
4944 .remove = ibmvnic_remove,
4945 .get_desired_dma = ibmvnic_get_desired_dma,
4946 .name = ibmvnic_driver_name,
4947 .pm = &ibmvnic_pm_ops,
4948};
4949
4950/* module functions */
4951static int __init ibmvnic_module_init(void)
4952{
4953 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4954 IBMVNIC_DRIVER_VERSION);
4955
4956 return vio_register_driver(&ibmvnic_driver);
4957}
4958
4959static void __exit ibmvnic_module_exit(void)
4960{
4961 vio_unregister_driver(&ibmvnic_driver);
4962}
4963
4964module_init(ibmvnic_module_init);
4965module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)