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ibmvnic: Fix rx queue cleanup for non-fatal resets
[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 *);
93static void release_sub_crqs(struct ibmvnic_adapter *);
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);
112static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 114static void send_login(struct ibmvnic_adapter *adapter);
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 *);
f992887c 119static void release_crq_queue(struct ibmvnic_adapter *);
c26eba03 120static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
032c5e82
TF		 121
122struct ibmvnic_stat {
123 char name[ETH_GSTRING_LEN];
124 int offset;
125};
126
127#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
128 offsetof(struct ibmvnic_statistics, stat))
129#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
130
131static const struct ibmvnic_stat ibmvnic_stats[] = {
132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
154};
155
156static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
157 unsigned long length, unsigned long *number,
158 unsigned long *irq)
159{
160 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
161 long rc;
162
163 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
164 *number = retbuf[0];
165 *irq = retbuf[1];
166
167 return rc;
168}
169
032c5e82
TF		 170static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
171 struct ibmvnic_long_term_buff *ltb, int size)
172{
173 struct device *dev = &adapter->vdev->dev;
174
175 ltb->size = size;
176 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
177 GFP_KERNEL);
178
179 if (!ltb->buff) {
180 dev_err(dev, "Couldn't alloc long term buffer\n");
181 return -ENOMEM;
182 }
183 ltb->map_id = adapter->map_id;
184 adapter->map_id++;
db5d0b59
NF		 185
186 init_completion(&adapter->fw_done);
032c5e82
TF		 187 send_request_map(adapter, ltb->addr,
188 ltb->size, ltb->map_id);
032c5e82 189 wait_for_completion(&adapter->fw_done);
f3be0cbc
TF		 190
191 if (adapter->fw_done_rc) {
192 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
193 adapter->fw_done_rc);
194 return -1;
195 }
032c5e82
TF		 196 return 0;
197}
198
199static void free_long_term_buff(struct ibmvnic_adapter *adapter,
200 struct ibmvnic_long_term_buff *ltb)
201{
202 struct device *dev = &adapter->vdev->dev;
203
c657e32c
NF		 204 if (!ltb->buff)
205 return;
206
ed651a10
NF		 207 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
208 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 209 send_request_unmap(adapter, ltb->map_id);
59af56c2 210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 211}
212
f3be0cbc
TF		 213static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
214 struct ibmvnic_long_term_buff *ltb)
215{
216 memset(ltb->buff, 0, ltb->size);
217
218 init_completion(&adapter->fw_done);
219 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
220 wait_for_completion(&adapter->fw_done);
221
222 if (adapter->fw_done_rc) {
223 dev_info(&adapter->vdev->dev,
224 "Reset failed, attempting to free and reallocate buffer\n");
225 free_long_term_buff(adapter, ltb);
226 return alloc_long_term_buff(adapter, ltb, ltb->size);
227 }
228 return 0;
229}
230
f185a49a
TF		 231static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
232{
233 int i;
234
235 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
236 i++)
237 adapter->rx_pool[i].active = 0;
238}
239
032c5e82
TF		 240static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
241 struct ibmvnic_rx_pool *pool)
242{
243 int count = pool->size - atomic_read(&pool->available);
244 struct device *dev = &adapter->vdev->dev;
245 int buffers_added = 0;
246 unsigned long lpar_rc;
247 union sub_crq sub_crq;
248 struct sk_buff *skb;
249 unsigned int offset;
250 dma_addr_t dma_addr;
251 unsigned char *dst;
252 u64 *handle_array;
253 int shift = 0;
254 int index;
255 int i;
256
f185a49a
TF		 257 if (!pool->active)
258 return;
259
032c5e82
TF		 260 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
261 be32_to_cpu(adapter->login_rsp_buf->
262 off_rxadd_subcrqs));
263
264 for (i = 0; i < count; ++i) {
265 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
266 if (!skb) {
267 dev_err(dev, "Couldn't replenish rx buff\n");
268 adapter->replenish_no_mem++;
269 break;
270 }
271
272 index = pool->free_map[pool->next_free];
273
274 if (pool->rx_buff[index].skb)
275 dev_err(dev, "Inconsistent free_map!\n");
276
277 /* Copy the skb to the long term mapped DMA buffer */
278 offset = index * pool->buff_size;
279 dst = pool->long_term_buff.buff + offset;
280 memset(dst, 0, pool->buff_size);
281 dma_addr = pool->long_term_buff.addr + offset;
282 pool->rx_buff[index].data = dst;
283
284 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
285 pool->rx_buff[index].dma = dma_addr;
286 pool->rx_buff[index].skb = skb;
287 pool->rx_buff[index].pool_index = pool->index;
288 pool->rx_buff[index].size = pool->buff_size;
289
290 memset(&sub_crq, 0, sizeof(sub_crq));
291 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
292 sub_crq.rx_add.correlator =
293 cpu_to_be64((u64)&pool->rx_buff[index]);
294 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
295 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
296
297 /* The length field of the sCRQ is defined to be 24 bits so the
298 * buffer size needs to be left shifted by a byte before it is
299 * converted to big endian to prevent the last byte from being
300 * truncated.
301 */
302#ifdef __LITTLE_ENDIAN__
303 shift = 8;
304#endif
305 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
306
307 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
308 &sub_crq);
309 if (lpar_rc != H_SUCCESS)
310 goto failure;
311
312 buffers_added++;
313 adapter->replenish_add_buff_success++;
314 pool->next_free = (pool->next_free + 1) % pool->size;
315 }
316 atomic_add(buffers_added, &pool->available);
317 return;
318
319failure:
320 dev_info(dev, "replenish pools failure\n");
321 pool->free_map[pool->next_free] = index;
322 pool->rx_buff[index].skb = NULL;
323 if (!dma_mapping_error(dev, dma_addr))
324 dma_unmap_single(dev, dma_addr, pool->buff_size,
325 DMA_FROM_DEVICE);
326
327 dev_kfree_skb_any(skb);
328 adapter->replenish_add_buff_failure++;
329 atomic_add(buffers_added, &pool->available);
f185a49a
TF		 330
331 if (lpar_rc == H_CLOSED) {
332 /* Disable buffer pool replenishment and report carrier off if
333 * queue is closed. Firmware guarantees that a signal will
334 * be sent to the driver, triggering a reset.
335 */
336 deactivate_rx_pools(adapter);
337 netif_carrier_off(adapter->netdev);
338 }
032c5e82
TF		 339}
340
341static void replenish_pools(struct ibmvnic_adapter *adapter)
342{
343 int i;
344
032c5e82
TF		 345 adapter->replenish_task_cycles++;
346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
347 i++) {
348 if (adapter->rx_pool[i].active)
349 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
350 }
351}
352
3d52b594
JA		 353static void release_stats_buffers(struct ibmvnic_adapter *adapter)
354{
355 kfree(adapter->tx_stats_buffers);
356 kfree(adapter->rx_stats_buffers);
357}
358
359static int init_stats_buffers(struct ibmvnic_adapter *adapter)
360{
361 adapter->tx_stats_buffers =
362 kcalloc(adapter->req_tx_queues,
363 sizeof(struct ibmvnic_tx_queue_stats),
364 GFP_KERNEL);
365 if (!adapter->tx_stats_buffers)
366 return -ENOMEM;
367
368 adapter->rx_stats_buffers =
369 kcalloc(adapter->req_rx_queues,
370 sizeof(struct ibmvnic_rx_queue_stats),
371 GFP_KERNEL);
372 if (!adapter->rx_stats_buffers)
373 return -ENOMEM;
374
375 return 0;
376}
377
7bbc27a4
NF		 378static void release_stats_token(struct ibmvnic_adapter *adapter)
379{
380 struct device *dev = &adapter->vdev->dev;
381
382 if (!adapter->stats_token)
383 return;
384
385 dma_unmap_single(dev, adapter->stats_token,
386 sizeof(struct ibmvnic_statistics),
387 DMA_FROM_DEVICE);
388 adapter->stats_token = 0;
389}
390
391static int init_stats_token(struct ibmvnic_adapter *adapter)
392{
393 struct device *dev = &adapter->vdev->dev;
394 dma_addr_t stok;
395
396 stok = dma_map_single(dev, &adapter->stats,
397 sizeof(struct ibmvnic_statistics),
398 DMA_FROM_DEVICE);
399 if (dma_mapping_error(dev, stok)) {
400 dev_err(dev, "Couldn't map stats buffer\n");
401 return -1;
402 }
403
404 adapter->stats_token = stok;
d1cf33d9 405 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
7bbc27a4
NF		 406 return 0;
407}
408
8c0543ad
NF		 409static int reset_rx_pools(struct ibmvnic_adapter *adapter)
410{
411 struct ibmvnic_rx_pool *rx_pool;
412 int rx_scrqs;
f3be0cbc 413 int i, j, rc;
896d8695
JA		 414 u64 *size_array;
415
416 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
417 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
8c0543ad
NF		 418
419 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
420 for (i = 0; i < rx_scrqs; i++) {
421 rx_pool = &adapter->rx_pool[i];
422
d1cf33d9
NF		 423 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
424
896d8695
JA		 425 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
426 free_long_term_buff(adapter, &rx_pool->long_term_buff);
427 rx_pool->buff_size = be64_to_cpu(size_array[i]);
428 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
429 rx_pool->size *
430 rx_pool->buff_size);
431 } else {
432 rc = reset_long_term_buff(adapter,
433 &rx_pool->long_term_buff);
434 }
435
f3be0cbc
TF		 436 if (rc)
437 return rc;
8c0543ad
NF		 438
439 for (j = 0; j < rx_pool->size; j++)
440 rx_pool->free_map[j] = j;
441
442 memset(rx_pool->rx_buff, 0,
443 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
444
445 atomic_set(&rx_pool->available, 0);
446 rx_pool->next_alloc = 0;
447 rx_pool->next_free = 0;
c3e53b9a 448 rx_pool->active = 1;
8c0543ad
NF		 449 }
450
451 return 0;
452}
453
0ffe2cb7 454static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 455{
0ffe2cb7 456 struct ibmvnic_rx_pool *rx_pool;
0ffe2cb7 457 int i, j;
032c5e82 458
0ffe2cb7 459 if (!adapter->rx_pool)
032c5e82
TF		 460 return;
461
896d8695 462 for (i = 0; i < adapter->num_active_rx_pools; i++) {
0ffe2cb7
NF		 463 rx_pool = &adapter->rx_pool[i];
464
d1cf33d9
NF		 465 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
466
0ffe2cb7
NF		 467 kfree(rx_pool->free_map);
468 free_long_term_buff(adapter, &rx_pool->long_term_buff);
469
470 if (!rx_pool->rx_buff)
e0ebe942 471 continue;
0ffe2cb7
NF		 472
473 for (j = 0; j < rx_pool->size; j++) {
474 if (rx_pool->rx_buff[j].skb) {
475 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
476 rx_pool->rx_buff[i].skb = NULL;
477 }
478 }
479
480 kfree(rx_pool->rx_buff);
481 }
482
483 kfree(adapter->rx_pool);
484 adapter->rx_pool = NULL;
896d8695 485 adapter->num_active_rx_pools = 0;
0ffe2cb7
NF		 486}
487
488static int init_rx_pools(struct net_device *netdev)
489{
490 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
491 struct device *dev = &adapter->vdev->dev;
492 struct ibmvnic_rx_pool *rx_pool;
493 int rxadd_subcrqs;
494 u64 *size_array;
495 int i, j;
496
497 rxadd_subcrqs =
498 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
499 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
500 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
501
502 adapter->rx_pool = kcalloc(rxadd_subcrqs,
503 sizeof(struct ibmvnic_rx_pool),
504 GFP_KERNEL);
505 if (!adapter->rx_pool) {
506 dev_err(dev, "Failed to allocate rx pools\n");
507 return -1;
508 }
509
896d8695
JA		 510 adapter->num_active_rx_pools = 0;
511
0ffe2cb7
NF		 512 for (i = 0; i < rxadd_subcrqs; i++) {
513 rx_pool = &adapter->rx_pool[i];
514
515 netdev_dbg(adapter->netdev,
d1cf33d9 516 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
0ffe2cb7
NF		 517 i, adapter->req_rx_add_entries_per_subcrq,
518 be64_to_cpu(size_array[i]));
519
520 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
521 rx_pool->index = i;
522 rx_pool->buff_size = be64_to_cpu(size_array[i]);
523 rx_pool->active = 1;
524
525 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
526 GFP_KERNEL);
527 if (!rx_pool->free_map) {
528 release_rx_pools(adapter);
529 return -1;
032c5e82 530 }
0ffe2cb7
NF		 531
532 rx_pool->rx_buff = kcalloc(rx_pool->size,
533 sizeof(struct ibmvnic_rx_buff),
534 GFP_KERNEL);
535 if (!rx_pool->rx_buff) {
536 dev_err(dev, "Couldn't alloc rx buffers\n");
537 release_rx_pools(adapter);
538 return -1;
539 }
540
541 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
542 rx_pool->size * rx_pool->buff_size)) {
543 release_rx_pools(adapter);
544 return -1;
545 }
546
547 for (j = 0; j < rx_pool->size; ++j)
548 rx_pool->free_map[j] = j;
549
550 atomic_set(&rx_pool->available, 0);
551 rx_pool->next_alloc = 0;
552 rx_pool->next_free = 0;
032c5e82 553 }
0ffe2cb7 554
896d8695
JA		 555 adapter->num_active_rx_pools = rxadd_subcrqs;
556
0ffe2cb7 557 return 0;
032c5e82
TF		 558}
559
8c0543ad
NF		 560static int reset_tx_pools(struct ibmvnic_adapter *adapter)
561{
562 struct ibmvnic_tx_pool *tx_pool;
563 int tx_scrqs;
f3be0cbc 564 int i, j, rc;
8c0543ad
NF		 565
566 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
567 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9
NF		 568 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
569
8c0543ad
NF		 570 tx_pool = &adapter->tx_pool[i];
571
f3be0cbc
TF		 572 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
573 if (rc)
574 return rc;
8c0543ad 575
fdb06105
TF		 576 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
577 if (rc)
578 return rc;
579
8c0543ad
NF		 580 memset(tx_pool->tx_buff, 0,
581 adapter->req_tx_entries_per_subcrq *
582 sizeof(struct ibmvnic_tx_buff));
583
584 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
585 tx_pool->free_map[j] = j;
586
587 tx_pool->consumer_index = 0;
588 tx_pool->producer_index = 0;
fdb06105 589 tx_pool->tso_index = 0;
8c0543ad
NF		 590 }
591
592 return 0;
593}
594
4e6759be
DANR		 595static void release_vpd_data(struct ibmvnic_adapter *adapter)
596{
597 if (!adapter->vpd)
598 return;
599
600 kfree(adapter->vpd->buff);
601 kfree(adapter->vpd);
602}
603
c657e32c
NF		 604static void release_tx_pools(struct ibmvnic_adapter *adapter)
605{
606 struct ibmvnic_tx_pool *tx_pool;
896d8695 607 int i;
c657e32c
NF		 608
609 if (!adapter->tx_pool)
610 return;
611
896d8695 612 for (i = 0; i < adapter->num_active_tx_pools; i++) {
d1cf33d9 613 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
c657e32c
NF		 614 tx_pool = &adapter->tx_pool[i];
615 kfree(tx_pool->tx_buff);
616 free_long_term_buff(adapter, &tx_pool->long_term_buff);
fdb06105 617 free_long_term_buff(adapter, &tx_pool->tso_ltb);
c657e32c
NF		 618 kfree(tx_pool->free_map);
619 }
620
621 kfree(adapter->tx_pool);
622 adapter->tx_pool = NULL;
896d8695 623 adapter->num_active_tx_pools = 0;
c657e32c
NF		 624}
625
626static int init_tx_pools(struct net_device *netdev)
627{
628 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
629 struct device *dev = &adapter->vdev->dev;
630 struct ibmvnic_tx_pool *tx_pool;
631 int tx_subcrqs;
632 int i, j;
633
634 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
635 adapter->tx_pool = kcalloc(tx_subcrqs,
636 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
637 if (!adapter->tx_pool)
638 return -1;
639
896d8695
JA		 640 adapter->num_active_tx_pools = 0;
641
c657e32c
NF		 642 for (i = 0; i < tx_subcrqs; i++) {
643 tx_pool = &adapter->tx_pool[i];
d1cf33d9
NF		 644
645 netdev_dbg(adapter->netdev,
646 "Initializing tx_pool[%d], %lld buffs\n",
647 i, adapter->req_tx_entries_per_subcrq);
648
c657e32c
NF		 649 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
650 sizeof(struct ibmvnic_tx_buff),
651 GFP_KERNEL);
652 if (!tx_pool->tx_buff) {
653 dev_err(dev, "tx pool buffer allocation failed\n");
654 release_tx_pools(adapter);
655 return -1;
656 }
657
658 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
659 adapter->req_tx_entries_per_subcrq *
660 adapter->req_mtu)) {
661 release_tx_pools(adapter);
662 return -1;
663 }
664
fdb06105
TF		 665 /* alloc TSO ltb */
666 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
667 IBMVNIC_TSO_BUFS *
668 IBMVNIC_TSO_BUF_SZ)) {
669 release_tx_pools(adapter);
670 return -1;
671 }
672
673 tx_pool->tso_index = 0;
674
c657e32c
NF		 675 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
676 sizeof(int), GFP_KERNEL);
677 if (!tx_pool->free_map) {
678 release_tx_pools(adapter);
679 return -1;
680 }
681
682 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
683 tx_pool->free_map[j] = j;
684
685 tx_pool->consumer_index = 0;
686 tx_pool->producer_index = 0;
687 }
688
896d8695
JA		 689 adapter->num_active_tx_pools = tx_subcrqs;
690
c657e32c
NF		 691 return 0;
692}
693
661a2622
NF		 694static void release_error_buffers(struct ibmvnic_adapter *adapter)
695{
696 struct device *dev = &adapter->vdev->dev;
697 struct ibmvnic_error_buff *error_buff, *tmp;
698 unsigned long flags;
699
700 spin_lock_irqsave(&adapter->error_list_lock, flags);
701 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
702 list_del(&error_buff->list);
703 dma_unmap_single(dev, error_buff->dma, error_buff->len,
704 DMA_FROM_DEVICE);
705 kfree(error_buff->buff);
706 kfree(error_buff);
707 }
708 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
709}
710
d944c3d6
JA		 711static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
712{
713 int i;
714
715 if (adapter->napi_enabled)
716 return;
717
718 for (i = 0; i < adapter->req_rx_queues; i++)
719 napi_enable(&adapter->napi[i]);
720
721 adapter->napi_enabled = true;
722}
723
724static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
725{
726 int i;
727
728 if (!adapter->napi_enabled)
729 return;
730
d1cf33d9
NF		 731 for (i = 0; i < adapter->req_rx_queues; i++) {
732 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
d944c3d6 733 napi_disable(&adapter->napi[i]);
d1cf33d9 734 }
d944c3d6
JA		 735
736 adapter->napi_enabled = false;
737}
738
a57a5d25 739static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 740{
741 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 742 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 743 struct device *dev = &adapter->vdev->dev;
4d96f12a 744 int rc;
032c5e82 745
bd0b6723
JA		 746 do {
747 if (adapter->renegotiate) {
748 adapter->renegotiate = false;
b510888f 749 release_sub_crqs(adapter);
bd0b6723
JA		 750
751 reinit_completion(&adapter->init_done);
752 send_cap_queries(adapter);
753 if (!wait_for_completion_timeout(&adapter->init_done,
754 timeout)) {
755 dev_err(dev, "Capabilities query timeout\n");
756 return -1;
757 }
4d96f12a
TF		 758 rc = init_sub_crqs(adapter);
759 if (rc) {
760 dev_err(dev,
761 "Initialization of SCRQ's failed\n");
762 return -1;
763 }
764 rc = init_sub_crq_irqs(adapter);
765 if (rc) {
766 dev_err(dev,
767 "Initialization of SCRQ's irqs failed\n");
768 return -1;
769 }
bd0b6723
JA		 770 }
771
772 reinit_completion(&adapter->init_done);
773 send_login(adapter);
774 if (!wait_for_completion_timeout(&adapter->init_done,
775 timeout)) {
776 dev_err(dev, "Login timeout\n");
777 return -1;
778 }
779 } while (adapter->renegotiate);
780
3d166130
TF		 781 /* handle pending MAC address changes after successful login */
782 if (adapter->mac_change_pending) {
783 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
784 adapter->mac_change_pending = false;
785 }
786
a57a5d25
JA		 787 return 0;
788}
789
1b8955ee
NF		 790static void release_resources(struct ibmvnic_adapter *adapter)
791{
c7bac00b
NF		 792 int i;
793
4e6759be
DANR		 794 release_vpd_data(adapter);
795
1b8955ee
NF		 796 release_tx_pools(adapter);
797 release_rx_pools(adapter);
798
1b8955ee 799 release_stats_token(adapter);
3d52b594 800 release_stats_buffers(adapter);
661a2622 801 release_error_buffers(adapter);
c7bac00b
NF		 802
803 if (adapter->napi) {
804 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 805 if (&adapter->napi[i]) {
806 netdev_dbg(adapter->netdev,
807 "Releasing napi[%d]\n", i);
c7bac00b 808 netif_napi_del(&adapter->napi[i]);
d1cf33d9 809 }
c7bac00b
NF		 810 }
811 }
1b8955ee
NF		 812}
813
53da09e9
NF		 814static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
815{
816 struct net_device *netdev = adapter->netdev;
817 unsigned long timeout = msecs_to_jiffies(30000);
818 union ibmvnic_crq crq;
819 bool resend;
820 int rc;
821
d1cf33d9
NF		 822 netdev_dbg(netdev, "setting link state %d\n", link_state);
823
53da09e9
NF		 824 memset(&crq, 0, sizeof(crq));
825 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
826 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
827 crq.logical_link_state.link_state = link_state;
828
829 do {
830 resend = false;
831
832 reinit_completion(&adapter->init_done);
833 rc = ibmvnic_send_crq(adapter, &crq);
834 if (rc) {
835 netdev_err(netdev, "Failed to set link state\n");
836 return rc;
837 }
838
839 if (!wait_for_completion_timeout(&adapter->init_done,
840 timeout)) {
841 netdev_err(netdev, "timeout setting link state\n");
842 return -1;
843 }
844
845 if (adapter->init_done_rc == 1) {
846 /* Partuial success, delay and re-send */
847 mdelay(1000);
848 resend = true;
849 }
850 } while (resend);
851
852 return 0;
853}
854
7f3c6e6b
TF		 855static int set_real_num_queues(struct net_device *netdev)
856{
857 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
858 int rc;
859
d1cf33d9
NF		 860 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
861 adapter->req_tx_queues, adapter->req_rx_queues);
862
7f3c6e6b
TF		 863 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
864 if (rc) {
865 netdev_err(netdev, "failed to set the number of tx queues\n");
866 return rc;
867 }
868
869 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
870 if (rc)
871 netdev_err(netdev, "failed to set the number of rx queues\n");
872
873 return rc;
874}
875
4e6759be
DANR		 876static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
877{
878 struct device *dev = &adapter->vdev->dev;
879 union ibmvnic_crq crq;
4e6759be
DANR		 880 int len = 0;
881
882 if (adapter->vpd->buff)
883 len = adapter->vpd->len;
884
69d08dcb 885 init_completion(&adapter->fw_done);
4e6759be
DANR		 886 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
887 crq.get_vpd_size.cmd = GET_VPD_SIZE;
888 ibmvnic_send_crq(adapter, &crq);
889 wait_for_completion(&adapter->fw_done);
890
891 if (!adapter->vpd->len)
892 return -ENODATA;
893
894 if (!adapter->vpd->buff)
895 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
896 else if (adapter->vpd->len != len)
897 adapter->vpd->buff =
898 krealloc(adapter->vpd->buff,
899 adapter->vpd->len, GFP_KERNEL);
900
901 if (!adapter->vpd->buff) {
902 dev_err(dev, "Could allocate VPD buffer\n");
903 return -ENOMEM;
904 }
905
906 adapter->vpd->dma_addr =
907 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
908 DMA_FROM_DEVICE);
f743106e 909 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
4e6759be
DANR		 910 dev_err(dev, "Could not map VPD buffer\n");
911 kfree(adapter->vpd->buff);
912 return -ENOMEM;
913 }
914
915 reinit_completion(&adapter->fw_done);
916 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
917 crq.get_vpd.cmd = GET_VPD;
918 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
919 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
920 ibmvnic_send_crq(adapter, &crq);
921 wait_for_completion(&adapter->fw_done);
922
923 return 0;
924}
925
bfc32f29 926static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 927{
bfc32f29
NF		 928 struct net_device *netdev = adapter->netdev;
929 int i, rc;
a57a5d25 930
7f3c6e6b
TF		 931 rc = set_real_num_queues(netdev);
932 if (rc)
933 return rc;
bd0b6723 934
3d52b594
JA		 935 rc = init_stats_buffers(adapter);
936 if (rc)
937 return rc;
938
5d5e84eb
NF		 939 rc = init_stats_token(adapter);
940 if (rc)
941 return rc;
942
4e6759be
DANR		 943 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
944 if (!adapter->vpd)
945 return -ENOMEM;
946
69d08dcb
JA		 947 /* Vital Product Data (VPD) */
948 rc = ibmvnic_get_vpd(adapter);
949 if (rc) {
950 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
951 return rc;
952 }
953
032c5e82
TF		 954 adapter->map_id = 1;
955 adapter->napi = kcalloc(adapter->req_rx_queues,
956 sizeof(struct napi_struct), GFP_KERNEL);
957 if (!adapter->napi)
bfc32f29
NF		 958 return -ENOMEM;
959
032c5e82 960 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 961 netdev_dbg(netdev, "Adding napi[%d]\n", i);
032c5e82
TF		 962 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
963 NAPI_POLL_WEIGHT);
032c5e82 964 }
032c5e82 965
032c5e82 966 send_map_query(adapter);
0ffe2cb7
NF		 967
968 rc = init_rx_pools(netdev);
969 if (rc)
bfc32f29 970 return rc;
032c5e82 971
c657e32c 972 rc = init_tx_pools(netdev);
bfc32f29
NF		 973 return rc;
974}
975
ed651a10 976static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 977{
978 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 979 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 980 int i, rc;
981
90c8014c 982 adapter->state = VNIC_OPENING;
032c5e82 983 replenish_pools(adapter);
d944c3d6 984 ibmvnic_napi_enable(adapter);
bfc32f29 985
032c5e82
TF		 986 /* We're ready to receive frames, enable the sub-crq interrupts and
987 * set the logical link state to up
988 */
ed651a10 989 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 990 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
ed651a10
NF		 991 if (prev_state == VNIC_CLOSED)
992 enable_irq(adapter->rx_scrq[i]->irq);
993 else
994 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
995 }
032c5e82 996
ed651a10 997 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 998 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
ed651a10
NF		 999 if (prev_state == VNIC_CLOSED)
1000 enable_irq(adapter->tx_scrq[i]->irq);
1001 else
1002 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1003 }
032c5e82 1004
53da09e9 1005 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 1006 if (rc) {
1007 for (i = 0; i < adapter->req_rx_queues; i++)
1008 napi_disable(&adapter->napi[i]);
1009 release_resources(adapter);
ed651a10 1010 return rc;
bfc32f29 1011 }
032c5e82 1012
ed651a10
NF		 1013 netif_tx_start_all_queues(netdev);
1014
1015 if (prev_state == VNIC_CLOSED) {
1016 for (i = 0; i < adapter->req_rx_queues; i++)
1017 napi_schedule(&adapter->napi[i]);
1018 }
1019
1020 adapter->state = VNIC_OPEN;
1021 return rc;
1022}
1023
1024static int ibmvnic_open(struct net_device *netdev)
1025{
1026 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
69d08dcb 1027 int rc;
ed651a10
NF		 1028
1029 mutex_lock(&adapter->reset_lock);
1030
1031 if (adapter->state != VNIC_CLOSED) {
1032 rc = ibmvnic_login(netdev);
1033 if (rc) {
1034 mutex_unlock(&adapter->reset_lock);
1035 return rc;
1036 }
1037
1038 rc = init_resources(adapter);
1039 if (rc) {
1040 netdev_err(netdev, "failed to initialize resources\n");
1041 release_resources(adapter);
1042 mutex_unlock(&adapter->reset_lock);
1043 return rc;
1044 }
1045 }
1046
1047 rc = __ibmvnic_open(netdev);
e876a8a7 1048 netif_carrier_on(netdev);
4e6759be 1049
ed651a10
NF		 1050 mutex_unlock(&adapter->reset_lock);
1051
bfc32f29 1052 return rc;
032c5e82
TF		 1053}
1054
b41b83e9
NF		 1055static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1056{
1057 struct ibmvnic_tx_pool *tx_pool;
1058 u64 tx_entries;
1059 int tx_scrqs;
1060 int i, j;
1061
1062 if (!adapter->tx_pool)
1063 return;
1064
1065 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1066 tx_entries = adapter->req_tx_entries_per_subcrq;
1067
1068 /* Free any remaining skbs in the tx buffer pools */
1069 for (i = 0; i < tx_scrqs; i++) {
1070 tx_pool = &adapter->tx_pool[i];
1071 if (!tx_pool)
1072 continue;
1073
d1cf33d9 1074 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
b41b83e9
NF		 1075 for (j = 0; j < tx_entries; j++) {
1076 if (tx_pool->tx_buff[j].skb) {
1077 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1078 tx_pool->tx_buff[j].skb = NULL;
1079 }
1080 }
1081 }
1082}
1083
ed651a10 1084static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 1085{
1086 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 1087 int rc = 0;
ea5509f5
JA		 1088 int i;
1089
90c8014c 1090 adapter->state = VNIC_CLOSING;
4c2687a5
TF		 1091
1092 /* ensure that transmissions are stopped if called by do_reset */
1093 if (adapter->resetting)
1094 netif_tx_disable(netdev);
1095 else
1096 netif_tx_stop_all_queues(netdev);
1097
d944c3d6 1098 ibmvnic_napi_disable(adapter);
46293b94
NF		 1099
1100 if (adapter->tx_scrq) {
1101 for (i = 0; i < adapter->req_tx_queues; i++)
d1cf33d9
NF		 1102 if (adapter->tx_scrq[i]->irq) {
1103 netdev_dbg(adapter->netdev,
1104 "Disabling tx_scrq[%d] irq\n", i);
46293b94 1105 disable_irq(adapter->tx_scrq[i]->irq);
d1cf33d9 1106 }
46293b94
NF		 1107 }
1108
53da09e9 1109 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 1110 if (rc)
1111 return rc;
1112
1113 if (adapter->rx_scrq) {
1114 for (i = 0; i < adapter->req_rx_queues; i++) {
1115 int retries = 10;
1116
1117 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1118 retries--;
1119 mdelay(100);
1120
1121 if (retries == 0)
1122 break;
1123 }
1124
d1cf33d9
NF		 1125 if (adapter->rx_scrq[i]->irq) {
1126 netdev_dbg(adapter->netdev,
1127 "Disabling rx_scrq[%d] irq\n", i);
46293b94 1128 disable_irq(adapter->rx_scrq[i]->irq);
d1cf33d9 1129 }
46293b94
NF		 1130 }
1131 }
ea5509f5 1132
10f76215 1133 clean_tx_pools(adapter);
90c8014c 1134 adapter->state = VNIC_CLOSED;
53da09e9 1135 return rc;
032c5e82
TF		 1136}
1137
ed651a10
NF		 1138static int ibmvnic_close(struct net_device *netdev)
1139{
1140 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1141 int rc;
1142
1143 mutex_lock(&adapter->reset_lock);
1144 rc = __ibmvnic_close(netdev);
1145 mutex_unlock(&adapter->reset_lock);
1146
1147 return rc;
1148}
1149
ad7775dc
TF		 1150/**
1151 * build_hdr_data - creates L2/L3/L4 header data buffer
1152 * @hdr_field - bitfield determining needed headers
1153 * @skb - socket buffer
1154 * @hdr_len - array of header lengths
1155 * @tot_len - total length of data
1156 *
1157 * Reads hdr_field to determine which headers are needed by firmware.
1158 * Builds a buffer containing these headers. Saves individual header
1159 * lengths and total buffer length to be used to build descriptors.
1160 */
1161static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1162 int *hdr_len, u8 *hdr_data)
1163{
1164 int len = 0;
1165 u8 *hdr;
1166
1167 hdr_len[0] = sizeof(struct ethhdr);
1168
1169 if (skb->protocol == htons(ETH_P_IP)) {
1170 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1171 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1172 hdr_len[2] = tcp_hdrlen(skb);
1173 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1174 hdr_len[2] = sizeof(struct udphdr);
1175 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1176 hdr_len[1] = sizeof(struct ipv6hdr);
1177 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1178 hdr_len[2] = tcp_hdrlen(skb);
1179 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1180 hdr_len[2] = sizeof(struct udphdr);
4eb50ceb
TF		 1181 } else if (skb->protocol == htons(ETH_P_ARP)) {
1182 hdr_len[1] = arp_hdr_len(skb->dev);
1183 hdr_len[2] = 0;
ad7775dc
TF		 1184 }
1185
1186 memset(hdr_data, 0, 120);
1187 if ((hdr_field >> 6) & 1) {
1188 hdr = skb_mac_header(skb);
1189 memcpy(hdr_data, hdr, hdr_len[0]);
1190 len += hdr_len[0];
1191 }
1192
1193 if ((hdr_field >> 5) & 1) {
1194 hdr = skb_network_header(skb);
1195 memcpy(hdr_data + len, hdr, hdr_len[1]);
1196 len += hdr_len[1];
1197 }
1198
1199 if ((hdr_field >> 4) & 1) {
1200 hdr = skb_transport_header(skb);
1201 memcpy(hdr_data + len, hdr, hdr_len[2]);
1202 len += hdr_len[2];
1203 }
1204 return len;
1205}
1206
1207/**
1208 * create_hdr_descs - create header and header extension descriptors
1209 * @hdr_field - bitfield determining needed headers
1210 * @data - buffer containing header data
1211 * @len - length of data buffer
1212 * @hdr_len - array of individual header lengths
1213 * @scrq_arr - descriptor array
1214 *
1215 * Creates header and, if needed, header extension descriptors and
1216 * places them in a descriptor array, scrq_arr
1217 */
1218
2de09681
TF		 1219static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1220 union sub_crq *scrq_arr)
ad7775dc
TF		 1221{
1222 union sub_crq hdr_desc;
1223 int tmp_len = len;
2de09681 1224 int num_descs = 0;
ad7775dc
TF		 1225 u8 *data, *cur;
1226 int tmp;
1227
1228 while (tmp_len > 0) {
1229 cur = hdr_data + len - tmp_len;
1230
1231 memset(&hdr_desc, 0, sizeof(hdr_desc));
1232 if (cur != hdr_data) {
1233 data = hdr_desc.hdr_ext.data;
1234 tmp = tmp_len > 29 ? 29 : tmp_len;
1235 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1236 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1237 hdr_desc.hdr_ext.len = tmp;
1238 } else {
1239 data = hdr_desc.hdr.data;
1240 tmp = tmp_len > 24 ? 24 : tmp_len;
1241 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1242 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1243 hdr_desc.hdr.len = tmp;
1244 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1245 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1246 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1247 hdr_desc.hdr.flag = hdr_field << 1;
1248 }
1249 memcpy(data, cur, tmp);
1250 tmp_len -= tmp;
1251 *scrq_arr = hdr_desc;
1252 scrq_arr++;
2de09681 1253 num_descs++;
ad7775dc 1254 }
2de09681
TF		 1255
1256 return num_descs;
ad7775dc
TF		 1257}
1258
1259/**
1260 * build_hdr_descs_arr - build a header descriptor array
1261 * @skb - socket buffer
1262 * @num_entries - number of descriptors to be sent
1263 * @subcrq - first TX descriptor
1264 * @hdr_field - bit field determining which headers will be sent
1265 *
1266 * This function will build a TX descriptor array with applicable
1267 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1268 */
1269
1270static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1271 int *num_entries, u8 hdr_field)
1272{
1273 int hdr_len[3] = {0, 0, 0};
2de09681 1274 int tot_len;
ad7775dc
TF		 1275 u8 *hdr_data = txbuff->hdr_data;
1276
1277 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1278 txbuff->hdr_data);
2de09681 1279 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
ad7775dc
TF		 1280 txbuff->indir_arr + 1);
1281}
1282
032c5e82
TF		 1283static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1284{
1285 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1286 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1287 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1288 struct device *dev = &adapter->vdev->dev;
1289 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1290 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1291 struct ibmvnic_tx_pool *tx_pool;
1292 unsigned int tx_send_failed = 0;
1293 unsigned int tx_map_failed = 0;
1294 unsigned int tx_dropped = 0;
1295 unsigned int tx_packets = 0;
1296 unsigned int tx_bytes = 0;
1297 dma_addr_t data_dma_addr;
1298 struct netdev_queue *txq;
032c5e82
TF		 1299 unsigned long lpar_rc;
1300 union sub_crq tx_crq;
1301 unsigned int offset;
ad7775dc 1302 int num_entries = 1;
032c5e82
TF		 1303 unsigned char *dst;
1304 u64 *handle_array;
1305 int index = 0;
a0dca10f 1306 u8 proto = 0;
032c5e82
TF		 1307 int ret = 0;
1308
ed651a10 1309 if (adapter->resetting) {
7f5b0308
TF		 1310 if (!netif_subqueue_stopped(netdev, skb))
1311 netif_stop_subqueue(netdev, queue_num);
1312 dev_kfree_skb_any(skb);
1313
032c5e82
TF		 1314 tx_send_failed++;
1315 tx_dropped++;
7f5b0308 1316 ret = NETDEV_TX_OK;
032c5e82
TF		 1317 goto out;
1318 }
1319
161b8a81
NF		 1320 tx_pool = &adapter->tx_pool[queue_num];
1321 tx_scrq = adapter->tx_scrq[queue_num];
1322 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1323 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1324 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1325
032c5e82 1326 index = tx_pool->free_map[tx_pool->consumer_index];
fdb06105
TF		 1327
1328 if (skb_is_gso(skb)) {
1329 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1330 dst = tx_pool->tso_ltb.buff + offset;
1331 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1332 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1333 tx_pool->tso_index++;
1334 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1335 tx_pool->tso_index = 0;
1336 } else {
1337 offset = index * adapter->req_mtu;
1338 dst = tx_pool->long_term_buff.buff + offset;
1339 memset(dst, 0, adapter->req_mtu);
1340 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1341 }
032c5e82 1342
15482056
TF		 1343 if (skb_shinfo(skb)->nr_frags) {
1344 int cur, i;
1345
1346 /* Copy the head */
1347 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1348 cur = skb_headlen(skb);
1349
1350 /* Copy the frags */
1351 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1352 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1353
1354 memcpy(dst + cur,
1355 page_address(skb_frag_page(frag)) +
1356 frag->page_offset, skb_frag_size(frag));
1357 cur += skb_frag_size(frag);
1358 }
1359 } else {
1360 skb_copy_from_linear_data(skb, dst, skb->len);
1361 }
1362
032c5e82
TF		 1363 tx_pool->consumer_index =
1364 (tx_pool->consumer_index + 1) %
068d9f90 1365 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1366
1367 tx_buff = &tx_pool->tx_buff[index];
1368 tx_buff->skb = skb;
1369 tx_buff->data_dma[0] = data_dma_addr;
1370 tx_buff->data_len[0] = skb->len;
1371 tx_buff->index = index;
1372 tx_buff->pool_index = queue_num;
1373 tx_buff->last_frag = true;
032c5e82
TF		 1374
1375 memset(&tx_crq, 0, sizeof(tx_crq));
1376 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1377 tx_crq.v1.type = IBMVNIC_TX_DESC;
1378 tx_crq.v1.n_crq_elem = 1;
1379 tx_crq.v1.n_sge = 1;
1380 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1381 tx_crq.v1.correlator = cpu_to_be32(index);
fdb06105
TF		 1382 if (skb_is_gso(skb))
1383 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1384 else
1385 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
032c5e82
TF		 1386 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1387 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1388
1389 if (adapter->vlan_header_insertion) {
1390 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1391 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1392 }
1393
1394 if (skb->protocol == htons(ETH_P_IP)) {
a0dca10f
TF		 1395 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1396 proto = ip_hdr(skb)->protocol;
1397 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1398 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1399 proto = ipv6_hdr(skb)->nexthdr;
032c5e82
TF		 1400 }
1401
a0dca10f
TF		 1402 if (proto == IPPROTO_TCP)
1403 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1404 else if (proto == IPPROTO_UDP)
1405 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1406
ad7775dc 1407 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1408 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1409 hdrs += 2;
1410 }
fdb06105
TF		 1411 if (skb_is_gso(skb)) {
1412 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1413 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1414 hdrs += 2;
1415 }
ad7775dc
TF		 1416 /* determine if l2/3/4 headers are sent to firmware */
1417 if ((*hdrs >> 7) & 1 &&
1418 (skb->protocol == htons(ETH_P_IP) ||
4eb50ceb
TF		 1419 skb->protocol == htons(ETH_P_IPV6) ||
1420 skb->protocol == htons(ETH_P_ARP))) {
ad7775dc
TF		 1421 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1422 tx_crq.v1.n_crq_elem = num_entries;
1423 tx_buff->indir_arr[0] = tx_crq;
1424 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1425 sizeof(tx_buff->indir_arr),
1426 DMA_TO_DEVICE);
1427 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1428 dev_kfree_skb_any(skb);
1429 tx_buff->skb = NULL;
ad7775dc
TF		 1430 if (!firmware_has_feature(FW_FEATURE_CMO))
1431 dev_err(dev, "tx: unable to map descriptor array\n");
1432 tx_map_failed++;
1433 tx_dropped++;
7f5b0308 1434 ret = NETDEV_TX_OK;
ad7775dc
TF		 1435 goto out;
1436 }
498cd8e4 1437 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1438 (u64)tx_buff->indir_dma,
1439 (u64)num_entries);
1440 } else {
498cd8e4
JA		 1441 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1442 &tx_crq);
ad7775dc 1443 }
032c5e82
TF		 1444 if (lpar_rc != H_SUCCESS) {
1445 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1446
1447 if (tx_pool->consumer_index == 0)
1448 tx_pool->consumer_index =
068d9f90 1449 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1450 else
1451 tx_pool->consumer_index--;
1452
7f5b0308
TF		 1453 dev_kfree_skb_any(skb);
1454 tx_buff->skb = NULL;
1455
b8c80b84
TF		 1456 if (lpar_rc == H_CLOSED) {
1457 /* Disable TX and report carrier off if queue is closed.
1458 * Firmware guarantees that a signal will be sent to the
1459 * driver, triggering a reset or some other action.
1460 */
1461 netif_tx_stop_all_queues(netdev);
1462 netif_carrier_off(netdev);
1463 }
7f5b0308 1464
032c5e82
TF		 1465 tx_send_failed++;
1466 tx_dropped++;
7f5b0308 1467 ret = NETDEV_TX_OK;
032c5e82
TF		 1468 goto out;
1469 }
142c0ac4 1470
58c8c0c0
BK		 1471 if (atomic_inc_return(&tx_scrq->used)
1472 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1473 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1474 netif_stop_subqueue(netdev, queue_num);
1475 }
1476
032c5e82
TF		 1477 tx_packets++;
1478 tx_bytes += skb->len;
1479 txq->trans_start = jiffies;
1480 ret = NETDEV_TX_OK;
1481
1482out:
1483 netdev->stats.tx_dropped += tx_dropped;
1484 netdev->stats.tx_bytes += tx_bytes;
1485 netdev->stats.tx_packets += tx_packets;
1486 adapter->tx_send_failed += tx_send_failed;
1487 adapter->tx_map_failed += tx_map_failed;
3d52b594
JA		 1488 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1489 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1490 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
032c5e82
TF		 1491
1492 return ret;
1493}
1494
1495static void ibmvnic_set_multi(struct net_device *netdev)
1496{
1497 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1498 struct netdev_hw_addr *ha;
1499 union ibmvnic_crq crq;
1500
1501 memset(&crq, 0, sizeof(crq));
1502 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1503 crq.request_capability.cmd = REQUEST_CAPABILITY;
1504
1505 if (netdev->flags & IFF_PROMISC) {
1506 if (!adapter->promisc_supported)
1507 return;
1508 } else {
1509 if (netdev->flags & IFF_ALLMULTI) {
1510 /* Accept all multicast */
1511 memset(&crq, 0, sizeof(crq));
1512 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1513 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1514 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1515 ibmvnic_send_crq(adapter, &crq);
1516 } else if (netdev_mc_empty(netdev)) {
1517 /* Reject all multicast */
1518 memset(&crq, 0, sizeof(crq));
1519 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1520 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1521 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1522 ibmvnic_send_crq(adapter, &crq);
1523 } else {
1524 /* Accept one or more multicast(s) */
1525 netdev_for_each_mc_addr(ha, netdev) {
1526 memset(&crq, 0, sizeof(crq));
1527 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1528 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1529 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1530 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1531 ha->addr);
1532 ibmvnic_send_crq(adapter, &crq);
1533 }
1534 }
1535 }
1536}
1537
c26eba03 1538static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
032c5e82
TF		 1539{
1540 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1541 struct sockaddr *addr = p;
1542 union ibmvnic_crq crq;
1543
1544 if (!is_valid_ether_addr(addr->sa_data))
1545 return -EADDRNOTAVAIL;
1546
1547 memset(&crq, 0, sizeof(crq));
1548 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1549 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1550 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
f813614f
TF		 1551
1552 init_completion(&adapter->fw_done);
032c5e82 1553 ibmvnic_send_crq(adapter, &crq);
f813614f 1554 wait_for_completion(&adapter->fw_done);
032c5e82 1555 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
f813614f 1556 return adapter->fw_done_rc ? -EIO : 0;
032c5e82
TF		 1557}
1558
c26eba03
JA		 1559static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1560{
1561 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1562 struct sockaddr *addr = p;
f813614f 1563 int rc;
c26eba03 1564
3d166130 1565 if (adapter->state == VNIC_PROBED) {
c26eba03
JA		 1566 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1567 adapter->mac_change_pending = true;
1568 return 0;
1569 }
1570
f813614f 1571 rc = __ibmvnic_set_mac(netdev, addr);
c26eba03 1572
f813614f 1573 return rc;
c26eba03
JA		 1574}
1575
ed651a10
NF		 1576/**
1577 * do_reset returns zero if we are able to keep processing reset events, or
1578 * non-zero if we hit a fatal error and must halt.
1579 */
1580static int do_reset(struct ibmvnic_adapter *adapter,
1581 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1582{
896d8695 1583 u64 old_num_rx_queues, old_num_tx_queues;
ed651a10
NF		 1584 struct net_device *netdev = adapter->netdev;
1585 int i, rc;
1586
d1cf33d9
NF		 1587 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1588 rwi->reset_reason);
1589
ed651a10
NF		 1590 netif_carrier_off(netdev);
1591 adapter->reset_reason = rwi->reset_reason;
1592
896d8695
JA		 1593 old_num_rx_queues = adapter->req_rx_queues;
1594 old_num_tx_queues = adapter->req_tx_queues;
1595
ed651a10
NF		 1596 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1597 rc = ibmvnic_reenable_crq_queue(adapter);
1598 if (rc)
1599 return 0;
1600 }
1601
1602 rc = __ibmvnic_close(netdev);
1603 if (rc)
1604 return rc;
1605
c26eba03
JA		 1606 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1607 adapter->wait_for_reset) {
1608 release_resources(adapter);
1609 release_sub_crqs(adapter);
1610 release_crq_queue(adapter);
1611 }
1612
8cb31cfc
JA		 1613 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1614 /* remove the closed state so when we call open it appears
1615 * we are coming from the probed state.
1616 */
1617 adapter->state = VNIC_PROBED;
032c5e82 1618
8cb31cfc
JA		 1619 rc = ibmvnic_init(adapter);
1620 if (rc)
2a1bf511 1621 return IBMVNIC_INIT_FAILED;
ed651a10 1622
8cb31cfc
JA		 1623 /* If the adapter was in PROBE state prior to the reset,
1624 * exit here.
1625 */
1626 if (reset_state == VNIC_PROBED)
1627 return 0;
ed651a10 1628
8cb31cfc
JA		 1629 rc = ibmvnic_login(netdev);
1630 if (rc) {
1631 adapter->state = VNIC_PROBED;
1632 return 0;
1633 }
ed651a10 1634
c26eba03
JA		 1635 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1636 adapter->wait_for_reset) {
1637 rc = init_resources(adapter);
1638 if (rc)
1639 return rc;
896d8695
JA		 1640 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1641 adapter->req_tx_queues != old_num_tx_queues) {
1642 release_rx_pools(adapter);
1643 release_tx_pools(adapter);
1644 init_rx_pools(netdev);
1645 init_tx_pools(netdev);
c26eba03
JA		 1646 } else {
1647 rc = reset_tx_pools(adapter);
1648 if (rc)
1649 return rc;
8c0543ad 1650
c26eba03
JA		 1651 rc = reset_rx_pools(adapter);
1652 if (rc)
1653 return rc;
ed651a10 1654
c26eba03
JA		 1655 if (reset_state == VNIC_CLOSED)
1656 return 0;
1657 }
8cb31cfc 1658 }
ed651a10
NF		 1659
1660 rc = __ibmvnic_open(netdev);
1661 if (rc) {
1662 if (list_empty(&adapter->rwi_list))
1663 adapter->state = VNIC_CLOSED;
1664 else
1665 adapter->state = reset_state;
1666
1667 return 0;
1668 }
1669
1670 netif_carrier_on(netdev);
1671
1672 /* kick napi */
1673 for (i = 0; i < adapter->req_rx_queues; i++)
1674 napi_schedule(&adapter->napi[i]);
1675
61d3e1d9
NF		 1676 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1677 netdev_notify_peers(netdev);
1678
ed651a10
NF		 1679 return 0;
1680}
1681
1682static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1683{
1684 struct ibmvnic_rwi *rwi;
1685
1686 mutex_lock(&adapter->rwi_lock);
1687
1688 if (!list_empty(&adapter->rwi_list)) {
1689 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1690 list);
1691 list_del(&rwi->list);
1692 } else {
1693 rwi = NULL;
1694 }
1695
1696 mutex_unlock(&adapter->rwi_lock);
1697 return rwi;
1698}
1699
1700static void free_all_rwi(struct ibmvnic_adapter *adapter)
1701{
1702 struct ibmvnic_rwi *rwi;
1703
1704 rwi = get_next_rwi(adapter);
1705 while (rwi) {
1706 kfree(rwi);
1707 rwi = get_next_rwi(adapter);
1708 }
1709}
1710
1711static void __ibmvnic_reset(struct work_struct *work)
1712{
1713 struct ibmvnic_rwi *rwi;
1714 struct ibmvnic_adapter *adapter;
1715 struct net_device *netdev;
1716 u32 reset_state;
c26eba03 1717 int rc = 0;
ed651a10
NF		 1718
1719 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1720 netdev = adapter->netdev;
1721
1722 mutex_lock(&adapter->reset_lock);
1723 adapter->resetting = true;
1724 reset_state = adapter->state;
1725
1726 rwi = get_next_rwi(adapter);
1727 while (rwi) {
1728 rc = do_reset(adapter, rwi, reset_state);
1729 kfree(rwi);
2a1bf511 1730 if (rc && rc != IBMVNIC_INIT_FAILED)
ed651a10
NF		 1731 break;
1732
1733 rwi = get_next_rwi(adapter);
1734 }
1735
c26eba03
JA		 1736 if (adapter->wait_for_reset) {
1737 adapter->wait_for_reset = false;
1738 adapter->reset_done_rc = rc;
1739 complete(&adapter->reset_done);
1740 }
1741
ed651a10 1742 if (rc) {
d1cf33d9 1743 netdev_dbg(adapter->netdev, "Reset failed\n");
ed651a10 1744 free_all_rwi(adapter);
6d0af07d 1745 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1746 return;
1747 }
1748
1749 adapter->resetting = false;
1750 mutex_unlock(&adapter->reset_lock);
1751}
1752
1753static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1754 enum ibmvnic_reset_reason reason)
1755{
1756 struct ibmvnic_rwi *rwi, *tmp;
1757 struct net_device *netdev = adapter->netdev;
1758 struct list_head *entry;
1759
1760 if (adapter->state == VNIC_REMOVING ||
1761 adapter->state == VNIC_REMOVED) {
1762 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1763 return;
1764 }
1765
6a2fb0e9
NF		 1766 if (adapter->state == VNIC_PROBING) {
1767 netdev_warn(netdev, "Adapter reset during probe\n");
1768 adapter->init_done_rc = EAGAIN;
1769 return;
1770 }
1771
ed651a10
NF		 1772 mutex_lock(&adapter->rwi_lock);
1773
1774 list_for_each(entry, &adapter->rwi_list) {
1775 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1776 if (tmp->reset_reason == reason) {
d1cf33d9 1777 netdev_dbg(netdev, "Skipping matching reset\n");
ed651a10
NF		 1778 mutex_unlock(&adapter->rwi_lock);
1779 return;
1780 }
1781 }
1782
1783 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1784 if (!rwi) {
1785 mutex_unlock(&adapter->rwi_lock);
1786 ibmvnic_close(netdev);
1787 return;
1788 }
1789
1790 rwi->reset_reason = reason;
1791 list_add_tail(&rwi->list, &adapter->rwi_list);
1792 mutex_unlock(&adapter->rwi_lock);
d1cf33d9
NF		 1793
1794 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
ed651a10
NF		 1795 schedule_work(&adapter->ibmvnic_reset);
1796}
1797
1798static void ibmvnic_tx_timeout(struct net_device *dev)
1799{
1800 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1801
1802 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1803}
1804
1805static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1806 struct ibmvnic_rx_buff *rx_buff)
1807{
1808 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1809
1810 rx_buff->skb = NULL;
1811
1812 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1813 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1814
1815 atomic_dec(&pool->available);
1816}
1817
1818static int ibmvnic_poll(struct napi_struct *napi, int budget)
1819{
1820 struct net_device *netdev = napi->dev;
1821 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1822 int scrq_num = (int)(napi - adapter->napi);
1823 int frames_processed = 0;
152ce47d 1824
032c5e82
TF		 1825restart_poll:
1826 while (frames_processed < budget) {
1827 struct sk_buff *skb;
1828 struct ibmvnic_rx_buff *rx_buff;
1829 union sub_crq *next;
1830 u32 length;
1831 u16 offset;
1832 u8 flags = 0;
1833
3468656f
JA		 1834 if (unlikely(adapter->resetting &&
1835 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
21ecba6c
TF		 1836 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1837 napi_complete_done(napi, frames_processed);
1838 return frames_processed;
1839 }
1840
032c5e82
TF		 1841 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1842 break;
1843 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1844 rx_buff =
1845 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1846 rx_comp.correlator);
1847 /* do error checking */
1848 if (next->rx_comp.rc) {
e1cea2e7
JA		 1849 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1850 be16_to_cpu(next->rx_comp.rc));
032c5e82
TF		 1851 /* free the entry */
1852 next->rx_comp.first = 0;
1853 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1854 continue;
032c5e82
TF		 1855 }
1856
1857 length = be32_to_cpu(next->rx_comp.len);
1858 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1859 flags = next->rx_comp.flags;
1860 skb = rx_buff->skb;
1861 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1862 length);
6052d5e2
MFV		 1863
1864 /* VLAN Header has been stripped by the system firmware and
1865 * needs to be inserted by the driver
1866 */
1867 if (adapter->rx_vlan_header_insertion &&
1868 (flags & IBMVNIC_VLAN_STRIPPED))
1869 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1870 ntohs(next->rx_comp.vlan_tci));
1871
032c5e82
TF		 1872 /* free the entry */
1873 next->rx_comp.first = 0;
1874 remove_buff_from_pool(adapter, rx_buff);
1875
1876 skb_put(skb, length);
1877 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1878 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1879
1880 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1881 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1882 skb->ip_summed = CHECKSUM_UNNECESSARY;
1883 }
1884
1885 length = skb->len;
1886 napi_gro_receive(napi, skb); /* send it up */
1887 netdev->stats.rx_packets++;
1888 netdev->stats.rx_bytes += length;
3d52b594
JA		 1889 adapter->rx_stats_buffers[scrq_num].packets++;
1890 adapter->rx_stats_buffers[scrq_num].bytes += length;
032c5e82
TF		 1891 frames_processed++;
1892 }
152ce47d
NF		 1893
1894 if (adapter->state != VNIC_CLOSING)
1895 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1896
1897 if (frames_processed < budget) {
1898 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1899 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1900 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1901 napi_reschedule(napi)) {
1902 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1903 goto restart_poll;
1904 }
1905 }
1906 return frames_processed;
1907}
1908
1909#ifdef CONFIG_NET_POLL_CONTROLLER
1910static void ibmvnic_netpoll_controller(struct net_device *dev)
1911{
1912 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1913 int i;
1914
1915 replenish_pools(netdev_priv(dev));
1916 for (i = 0; i < adapter->req_rx_queues; i++)
1917 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1918 adapter->rx_scrq[i]);
1919}
1920#endif
1921
c26eba03
JA		 1922static int wait_for_reset(struct ibmvnic_adapter *adapter)
1923{
1924 adapter->fallback.mtu = adapter->req_mtu;
1925 adapter->fallback.rx_queues = adapter->req_rx_queues;
1926 adapter->fallback.tx_queues = adapter->req_tx_queues;
1927 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1928 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1929
1930 init_completion(&adapter->reset_done);
1931 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1932 adapter->wait_for_reset = true;
1933 wait_for_completion(&adapter->reset_done);
1934
1935 if (adapter->reset_done_rc) {
1936 adapter->desired.mtu = adapter->fallback.mtu;
1937 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1938 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1939 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1940 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1941
1942 init_completion(&adapter->reset_done);
1943 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1944 wait_for_completion(&adapter->reset_done);
1945 }
1946 adapter->wait_for_reset = false;
1947
1948 return adapter->reset_done_rc;
1949}
1950
3a807b75
JA		 1951static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1952{
c26eba03
JA		 1953 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1954
1955 adapter->desired.mtu = new_mtu + ETH_HLEN;
1956
1957 return wait_for_reset(adapter);
3a807b75
JA		 1958}
1959
032c5e82
TF		 1960static const struct net_device_ops ibmvnic_netdev_ops = {
1961 .ndo_open = ibmvnic_open,
1962 .ndo_stop = ibmvnic_close,
1963 .ndo_start_xmit = ibmvnic_xmit,
1964 .ndo_set_rx_mode = ibmvnic_set_multi,
1965 .ndo_set_mac_address = ibmvnic_set_mac,
1966 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1967 .ndo_tx_timeout = ibmvnic_tx_timeout,
1968#ifdef CONFIG_NET_POLL_CONTROLLER
1969 .ndo_poll_controller = ibmvnic_netpoll_controller,
1970#endif
3a807b75 1971 .ndo_change_mtu = ibmvnic_change_mtu,
032c5e82
TF		 1972};
1973
1974/* ethtool functions */
1975
8a43379f
PR		 1976static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1977 struct ethtool_link_ksettings *cmd)
032c5e82 1978{
8a43379f
PR		 1979 u32 supported, advertising;
1980
1981 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1982 SUPPORTED_FIBRE);
8a43379f 1983 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1984 ADVERTISED_FIBRE);
8a43379f
PR		 1985 cmd->base.speed = SPEED_1000;
1986 cmd->base.duplex = DUPLEX_FULL;
1987 cmd->base.port = PORT_FIBRE;
1988 cmd->base.phy_address = 0;
1989 cmd->base.autoneg = AUTONEG_ENABLE;
1990
1991 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1992 supported);
1993 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1994 advertising);
1995
032c5e82
TF		 1996 return 0;
1997}
1998
4e6759be 1999static void ibmvnic_get_drvinfo(struct net_device *netdev,
032c5e82
TF		 2000 struct ethtool_drvinfo *info)
2001{
4e6759be
DANR		 2002 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2003
032c5e82
TF		 2004 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2005 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
4e6759be
DANR		 2006 strlcpy(info->fw_version, adapter->fw_version,
2007 sizeof(info->fw_version));
032c5e82
TF		 2008}
2009
2010static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2011{
2012 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2013
2014 return adapter->msg_enable;
2015}
2016
2017static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2018{
2019 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2020
2021 adapter->msg_enable = data;
2022}
2023
2024static u32 ibmvnic_get_link(struct net_device *netdev)
2025{
2026 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2027
2028 /* Don't need to send a query because we request a logical link up at
2029 * init and then we wait for link state indications
2030 */
2031 return adapter->logical_link_state;
2032}
2033
2034static void ibmvnic_get_ringparam(struct net_device *netdev,
2035 struct ethtool_ringparam *ring)
2036{
bc131b3a
JA		 2037 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2038
2039 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2040 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
032c5e82
TF		 2041 ring->rx_mini_max_pending = 0;
2042 ring->rx_jumbo_max_pending = 0;
bc131b3a
JA		 2043 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2044 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2045 ring->rx_mini_pending = 0;
2046 ring->rx_jumbo_pending = 0;
2047}
2048
c26eba03
JA		 2049static int ibmvnic_set_ringparam(struct net_device *netdev,
2050 struct ethtool_ringparam *ring)
2051{
2052 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2053
2054 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2055 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2056 netdev_err(netdev, "Invalid request.\n");
2057 netdev_err(netdev, "Max tx buffers = %llu\n",
2058 adapter->max_rx_add_entries_per_subcrq);
2059 netdev_err(netdev, "Max rx buffers = %llu\n",
2060 adapter->max_tx_entries_per_subcrq);
2061 return -EINVAL;
2062 }
2063
2064 adapter->desired.rx_entries = ring->rx_pending;
2065 adapter->desired.tx_entries = ring->tx_pending;
2066
2067 return wait_for_reset(adapter);
2068}
2069
c2dbeb67
JA		 2070static void ibmvnic_get_channels(struct net_device *netdev,
2071 struct ethtool_channels *channels)
2072{
2073 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2074
2075 channels->max_rx = adapter->max_rx_queues;
2076 channels->max_tx = adapter->max_tx_queues;
2077 channels->max_other = 0;
2078 channels->max_combined = 0;
2079 channels->rx_count = adapter->req_rx_queues;
2080 channels->tx_count = adapter->req_tx_queues;
2081 channels->other_count = 0;
2082 channels->combined_count = 0;
2083}
2084
c26eba03
JA		 2085static int ibmvnic_set_channels(struct net_device *netdev,
2086 struct ethtool_channels *channels)
2087{
2088 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2089
2090 adapter->desired.rx_queues = channels->rx_count;
2091 adapter->desired.tx_queues = channels->tx_count;
2092
2093 return wait_for_reset(adapter);
2094}
2095
032c5e82
TF		 2096static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2097{
3d52b594 2098 struct ibmvnic_adapter *adapter = netdev_priv(dev);
032c5e82
TF		 2099 int i;
2100
2101 if (stringset != ETH_SS_STATS)
2102 return;
2103
2104 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2105 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
3d52b594
JA		 2106
2107 for (i = 0; i < adapter->req_tx_queues; i++) {
2108 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2109 data += ETH_GSTRING_LEN;
2110
2111 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2112 data += ETH_GSTRING_LEN;
2113
2114 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2115 data += ETH_GSTRING_LEN;
2116 }
2117
2118 for (i = 0; i < adapter->req_rx_queues; i++) {
2119 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2120 data += ETH_GSTRING_LEN;
2121
2122 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2123 data += ETH_GSTRING_LEN;
2124
2125 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2126 data += ETH_GSTRING_LEN;
2127 }
032c5e82
TF		 2128}
2129
2130static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2131{
3d52b594
JA		 2132 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2133
032c5e82
TF		 2134 switch (sset) {
2135 case ETH_SS_STATS:
3d52b594
JA		 2136 return ARRAY_SIZE(ibmvnic_stats) +
2137 adapter->req_tx_queues * NUM_TX_STATS +
2138 adapter->req_rx_queues * NUM_RX_STATS;
032c5e82
TF		 2139 default:
2140 return -EOPNOTSUPP;
2141 }
2142}
2143
2144static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2145 struct ethtool_stats *stats, u64 *data)
2146{
2147 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2148 union ibmvnic_crq crq;
3d52b594 2149 int i, j;
032c5e82
TF		 2150
2151 memset(&crq, 0, sizeof(crq));
2152 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2153 crq.request_statistics.cmd = REQUEST_STATISTICS;
2154 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2155 crq.request_statistics.len =
2156 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 2157
2158 /* Wait for data to be written */
2159 init_completion(&adapter->stats_done);
db5d0b59 2160 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 2161 wait_for_completion(&adapter->stats_done);
2162
2163 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
52da5c11
JA		 2164 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2165 ibmvnic_stats[i].offset));
3d52b594
JA		 2166
2167 for (j = 0; j < adapter->req_tx_queues; j++) {
2168 data[i] = adapter->tx_stats_buffers[j].packets;
2169 i++;
2170 data[i] = adapter->tx_stats_buffers[j].bytes;
2171 i++;
2172 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2173 i++;
2174 }
2175
2176 for (j = 0; j < adapter->req_rx_queues; j++) {
2177 data[i] = adapter->rx_stats_buffers[j].packets;
2178 i++;
2179 data[i] = adapter->rx_stats_buffers[j].bytes;
2180 i++;
2181 data[i] = adapter->rx_stats_buffers[j].interrupts;
2182 i++;
2183 }
032c5e82
TF		 2184}
2185
2186static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 2187 .get_drvinfo = ibmvnic_get_drvinfo,
2188 .get_msglevel = ibmvnic_get_msglevel,
2189 .set_msglevel = ibmvnic_set_msglevel,
2190 .get_link = ibmvnic_get_link,
2191 .get_ringparam = ibmvnic_get_ringparam,
c26eba03 2192 .set_ringparam = ibmvnic_set_ringparam,
c2dbeb67 2193 .get_channels = ibmvnic_get_channels,
c26eba03 2194 .set_channels = ibmvnic_set_channels,
032c5e82
TF		 2195 .get_strings = ibmvnic_get_strings,
2196 .get_sset_count = ibmvnic_get_sset_count,
2197 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 2198 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 2199};
2200
2201/* Routines for managing CRQs/sCRQs */
2202
57a49436
NF		 2203static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2204 struct ibmvnic_sub_crq_queue *scrq)
2205{
2206 int rc;
2207
2208 if (scrq->irq) {
2209 free_irq(scrq->irq, scrq);
2210 irq_dispose_mapping(scrq->irq);
2211 scrq->irq = 0;
2212 }
2213
c8b2ad0a 2214 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
57a49436
NF		 2215 scrq->cur = 0;
2216
2217 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2218 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2219 return rc;
2220}
2221
2222static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2223{
2224 int i, rc;
2225
2226 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 2227 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
57a49436
NF		 2228 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2229 if (rc)
2230 return rc;
2231 }
2232
2233 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 2234 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
57a49436
NF		 2235 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2236 if (rc)
2237 return rc;
2238 }
2239
57a49436
NF		 2240 return rc;
2241}
2242
032c5e82
TF		 2243static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2244 struct ibmvnic_sub_crq_queue *scrq)
2245{
2246 struct device *dev = &adapter->vdev->dev;
2247 long rc;
2248
2249 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2250
2251 /* Close the sub-crqs */
2252 do {
2253 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2254 adapter->vdev->unit_address,
2255 scrq->crq_num);
2256 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2257
ffa73855
TF		 2258 if (rc) {
2259 netdev_err(adapter->netdev,
2260 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2261 scrq->crq_num, rc);
2262 }
2263
032c5e82
TF		 2264 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2265 DMA_BIDIRECTIONAL);
2266 free_pages((unsigned long)scrq->msgs, 2);
2267 kfree(scrq);
2268}
2269
2270static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2271 *adapter)
2272{
2273 struct device *dev = &adapter->vdev->dev;
2274 struct ibmvnic_sub_crq_queue *scrq;
2275 int rc;
2276
1bb3c739 2277 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 2278 if (!scrq)
2279 return NULL;
2280
7f7adc50 2281 scrq->msgs =
1bb3c739 2282 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 2283 if (!scrq->msgs) {
2284 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2285 goto zero_page_failed;
2286 }
2287
2288 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2289 DMA_BIDIRECTIONAL);
2290 if (dma_mapping_error(dev, scrq->msg_token)) {
2291 dev_warn(dev, "Couldn't map crq queue messages page\n");
2292 goto map_failed;
2293 }
2294
2295 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2296 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2297
2298 if (rc == H_RESOURCE)
2299 rc = ibmvnic_reset_crq(adapter);
2300
2301 if (rc == H_CLOSED) {
2302 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2303 } else if (rc) {
2304 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2305 goto reg_failed;
2306 }
2307
032c5e82
TF		 2308 scrq->adapter = adapter;
2309 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 2310 spin_lock_init(&scrq->lock);
2311
2312 netdev_dbg(adapter->netdev,
2313 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2314 scrq->crq_num, scrq->hw_irq, scrq->irq);
2315
2316 return scrq;
2317
032c5e82
TF		 2318reg_failed:
2319 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2320 DMA_BIDIRECTIONAL);
2321map_failed:
2322 free_pages((unsigned long)scrq->msgs, 2);
2323zero_page_failed:
2324 kfree(scrq);
2325
2326 return NULL;
2327}
2328
2329static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2330{
2331 int i;
2332
2333 if (adapter->tx_scrq) {
b510888f
NF		 2334 for (i = 0; i < adapter->req_tx_queues; i++) {
2335 if (!adapter->tx_scrq[i])
2336 continue;
2337
d1cf33d9
NF		 2338 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2339 i);
b510888f 2340 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 2341 free_irq(adapter->tx_scrq[i]->irq,
2342 adapter->tx_scrq[i]);
88eb98a0 2343 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 2344 adapter->tx_scrq[i]->irq = 0;
032c5e82 2345 }
b510888f
NF		 2346
2347 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2348 }
2349
9501df3c 2350 kfree(adapter->tx_scrq);
032c5e82
TF		 2351 adapter->tx_scrq = NULL;
2352 }
2353
2354 if (adapter->rx_scrq) {
b510888f
NF		 2355 for (i = 0; i < adapter->req_rx_queues; i++) {
2356 if (!adapter->rx_scrq[i])
2357 continue;
2358
d1cf33d9
NF		 2359 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2360 i);
b510888f 2361 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 2362 free_irq(adapter->rx_scrq[i]->irq,
2363 adapter->rx_scrq[i]);
88eb98a0 2364 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 2365 adapter->rx_scrq[i]->irq = 0;
032c5e82 2366 }
032c5e82 2367
b510888f
NF		 2368 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2369 }
ea22d51a 2370
b510888f 2371 kfree(adapter->rx_scrq);
ea22d51a
TF		 2372 adapter->rx_scrq = NULL;
2373 }
ea22d51a
TF		 2374}
2375
032c5e82
TF		 2376static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2377 struct ibmvnic_sub_crq_queue *scrq)
2378{
2379 struct device *dev = &adapter->vdev->dev;
2380 unsigned long rc;
2381
2382 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2383 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2384 if (rc)
2385 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2386 scrq->hw_irq, rc);
2387 return rc;
2388}
2389
2390static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2391 struct ibmvnic_sub_crq_queue *scrq)
2392{
2393 struct device *dev = &adapter->vdev->dev;
2394 unsigned long rc;
2395
2396 if (scrq->hw_irq > 0x100000000ULL) {
2397 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2398 return 1;
2399 }
2400
2401 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2402 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2403 if (rc)
2404 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2405 scrq->hw_irq, rc);
2406 return rc;
2407}
2408
2409static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2410 struct ibmvnic_sub_crq_queue *scrq)
2411{
2412 struct device *dev = &adapter->vdev->dev;
2413 struct ibmvnic_tx_buff *txbuff;
2414 union sub_crq *next;
2415 int index;
2416 int i, j;
ad7775dc 2417 u8 first;
032c5e82
TF		 2418
2419restart_loop:
2420 while (pending_scrq(adapter, scrq)) {
2421 unsigned int pool = scrq->pool_index;
2422
2423 next = ibmvnic_next_scrq(adapter, scrq);
2424 for (i = 0; i < next->tx_comp.num_comps; i++) {
2425 if (next->tx_comp.rcs[i]) {
2426 dev_err(dev, "tx error %x\n",
2427 next->tx_comp.rcs[i]);
2428 continue;
2429 }
2430 index = be32_to_cpu(next->tx_comp.correlators[i]);
2431 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2432
2433 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2434 if (!txbuff->data_dma[j])
2435 continue;
2436
2437 txbuff->data_dma[j] = 0;
032c5e82 2438 }
ad7775dc
TF		 2439 /* if sub_crq was sent indirectly */
2440 first = txbuff->indir_arr[0].generic.first;
2441 if (first == IBMVNIC_CRQ_CMD) {
2442 dma_unmap_single(dev, txbuff->indir_dma,
2443 sizeof(txbuff->indir_arr),
2444 DMA_TO_DEVICE);
2445 }
032c5e82 2446
142c0ac4 2447 if (txbuff->last_frag) {
032c5e82 2448 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 2449 txbuff->skb = NULL;
142c0ac4 2450 }
032c5e82
TF		 2451
2452 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2453 producer_index] = index;
2454 adapter->tx_pool[pool].producer_index =
2455 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 2456 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2457 }
2458 /* remove tx_comp scrq*/
2459 next->tx_comp.first = 0;
7c3e7de3
NF		 2460
2461 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2462 (adapter->req_tx_entries_per_subcrq / 2) &&
2463 __netif_subqueue_stopped(adapter->netdev,
2464 scrq->pool_index)) {
2465 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2466 netdev_info(adapter->netdev, "Started queue %d\n",
2467 scrq->pool_index);
2468 }
032c5e82
TF		 2469 }
2470
2471 enable_scrq_irq(adapter, scrq);
2472
2473 if (pending_scrq(adapter, scrq)) {
2474 disable_scrq_irq(adapter, scrq);
2475 goto restart_loop;
2476 }
2477
2478 return 0;
2479}
2480
2481static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2482{
2483 struct ibmvnic_sub_crq_queue *scrq = instance;
2484 struct ibmvnic_adapter *adapter = scrq->adapter;
2485
2486 disable_scrq_irq(adapter, scrq);
2487 ibmvnic_complete_tx(adapter, scrq);
2488
2489 return IRQ_HANDLED;
2490}
2491
2492static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2493{
2494 struct ibmvnic_sub_crq_queue *scrq = instance;
2495 struct ibmvnic_adapter *adapter = scrq->adapter;
2496
09fb35ea
NF		 2497 /* When booting a kdump kernel we can hit pending interrupts
2498 * prior to completing driver initialization.
2499 */
2500 if (unlikely(adapter->state != VNIC_OPEN))
2501 return IRQ_NONE;
2502
3d52b594
JA		 2503 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2504
032c5e82
TF		 2505 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2506 disable_scrq_irq(adapter, scrq);
2507 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2508 }
2509
2510 return IRQ_HANDLED;
2511}
2512
ea22d51a
TF		 2513static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2514{
2515 struct device *dev = &adapter->vdev->dev;
2516 struct ibmvnic_sub_crq_queue *scrq;
2517 int i = 0, j = 0;
2518 int rc = 0;
2519
2520 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9
NF		 2521 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2522 i);
ea22d51a
TF		 2523 scrq = adapter->tx_scrq[i];
2524 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2525
99c1790e 2526 if (!scrq->irq) {
ea22d51a
TF		 2527 rc = -EINVAL;
2528 dev_err(dev, "Error mapping irq\n");
2529 goto req_tx_irq_failed;
2530 }
2531
2532 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2533 0, "ibmvnic_tx", scrq);
2534
2535 if (rc) {
2536 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2537 scrq->irq, rc);
2538 irq_dispose_mapping(scrq->irq);
2539 goto req_rx_irq_failed;
2540 }
2541 }
2542
2543 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 2544 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2545 i);
ea22d51a
TF		 2546 scrq = adapter->rx_scrq[i];
2547 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2548 if (!scrq->irq) {
ea22d51a
TF		 2549 rc = -EINVAL;
2550 dev_err(dev, "Error mapping irq\n");
2551 goto req_rx_irq_failed;
2552 }
2553 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2554 0, "ibmvnic_rx", scrq);
2555 if (rc) {
2556 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2557 scrq->irq, rc);
2558 irq_dispose_mapping(scrq->irq);
2559 goto req_rx_irq_failed;
2560 }
2561 }
2562 return rc;
2563
2564req_rx_irq_failed:
8bf371e6 2565 for (j = 0; j < i; j++) {
ea22d51a
TF		 2566 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2567 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2568 }
ea22d51a
TF		 2569 i = adapter->req_tx_queues;
2570req_tx_irq_failed:
8bf371e6 2571 for (j = 0; j < i; j++) {
ea22d51a
TF		 2572 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2573 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2574 }
b510888f 2575 release_sub_crqs(adapter);
ea22d51a
TF		 2576 return rc;
2577}
2578
d346b9bc 2579static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2580{
2581 struct device *dev = &adapter->vdev->dev;
2582 struct ibmvnic_sub_crq_queue **allqueues;
2583 int registered_queues = 0;
032c5e82
TF		 2584 int total_queues;
2585 int more = 0;
ea22d51a 2586 int i;
032c5e82 2587
032c5e82
TF		 2588 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2589
1bb3c739 2590 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2591 if (!allqueues)
d346b9bc 2592 return -1;
032c5e82
TF		 2593
2594 for (i = 0; i < total_queues; i++) {
2595 allqueues[i] = init_sub_crq_queue(adapter);
2596 if (!allqueues[i]) {
2597 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2598 break;
2599 }
2600 registered_queues++;
2601 }
2602
2603 /* Make sure we were able to register the minimum number of queues */
2604 if (registered_queues <
2605 adapter->min_tx_queues + adapter->min_rx_queues) {
2606 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2607 goto tx_failed;
2608 }
2609
2610 /* Distribute the failed allocated queues*/
2611 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2612 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2613 switch (i % 3) {
2614 case 0:
2615 if (adapter->req_rx_queues > adapter->min_rx_queues)
2616 adapter->req_rx_queues--;
2617 else
2618 more++;
2619 break;
2620 case 1:
2621 if (adapter->req_tx_queues > adapter->min_tx_queues)
2622 adapter->req_tx_queues--;
2623 else
2624 more++;
2625 break;
2626 }
2627 }
2628
2629 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2630 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2631 if (!adapter->tx_scrq)
2632 goto tx_failed;
2633
2634 for (i = 0; i < adapter->req_tx_queues; i++) {
2635 adapter->tx_scrq[i] = allqueues[i];
2636 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2637 }
2638
2639 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2640 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2641 if (!adapter->rx_scrq)
2642 goto rx_failed;
2643
2644 for (i = 0; i < adapter->req_rx_queues; i++) {
2645 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2646 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2647 }
2648
d346b9bc
NF		 2649 kfree(allqueues);
2650 return 0;
2651
2652rx_failed:
2653 kfree(adapter->tx_scrq);
2654 adapter->tx_scrq = NULL;
2655tx_failed:
2656 for (i = 0; i < registered_queues; i++)
2657 release_sub_crq_queue(adapter, allqueues[i]);
2658 kfree(allqueues);
2659 return -1;
2660}
2661
2662static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2663{
2664 struct device *dev = &adapter->vdev->dev;
2665 union ibmvnic_crq crq;
c26eba03 2666 int max_entries;
d346b9bc
NF		 2667
2668 if (!retry) {
2669 /* Sub-CRQ entries are 32 byte long */
2670 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2671
2672 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2673 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2674 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2675 return;
2676 }
2677
c26eba03
JA		 2678 if (adapter->desired.mtu)
2679 adapter->req_mtu = adapter->desired.mtu;
2680 else
2681 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2682
2683 if (!adapter->desired.tx_entries)
2684 adapter->desired.tx_entries =
2685 adapter->max_tx_entries_per_subcrq;
2686 if (!adapter->desired.rx_entries)
2687 adapter->desired.rx_entries =
2688 adapter->max_rx_add_entries_per_subcrq;
2689
2690 max_entries = IBMVNIC_MAX_LTB_SIZE /
2691 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2692
2693 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2694 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2695 adapter->desired.tx_entries = max_entries;
2696 }
d346b9bc 2697
c26eba03
JA		 2698 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2699 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2700 adapter->desired.rx_entries = max_entries;
2701 }
2702
2703 if (adapter->desired.tx_entries)
2704 adapter->req_tx_entries_per_subcrq =
2705 adapter->desired.tx_entries;
2706 else
2707 adapter->req_tx_entries_per_subcrq =
2708 adapter->max_tx_entries_per_subcrq;
2709
2710 if (adapter->desired.rx_entries)
2711 adapter->req_rx_add_entries_per_subcrq =
2712 adapter->desired.rx_entries;
2713 else
2714 adapter->req_rx_add_entries_per_subcrq =
2715 adapter->max_rx_add_entries_per_subcrq;
2716
2717 if (adapter->desired.tx_queues)
2718 adapter->req_tx_queues =
2719 adapter->desired.tx_queues;
2720 else
2721 adapter->req_tx_queues =
2722 adapter->opt_tx_comp_sub_queues;
2723
2724 if (adapter->desired.rx_queues)
2725 adapter->req_rx_queues =
2726 adapter->desired.rx_queues;
2727 else
2728 adapter->req_rx_queues =
2729 adapter->opt_rx_comp_queues;
2730
2731 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
d346b9bc
NF		 2732 }
2733
032c5e82
TF		 2734 memset(&crq, 0, sizeof(crq));
2735 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2736 crq.request_capability.cmd = REQUEST_CAPABILITY;
2737
2738 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2739 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2740 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2741 ibmvnic_send_crq(adapter, &crq);
2742
2743 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2744 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2745 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2746 ibmvnic_send_crq(adapter, &crq);
2747
2748 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2749 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2750 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2751 ibmvnic_send_crq(adapter, &crq);
2752
2753 crq.request_capability.capability =
2754 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2755 crq.request_capability.number =
de89e854 2756 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2757 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2758 ibmvnic_send_crq(adapter, &crq);
2759
2760 crq.request_capability.capability =
2761 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2762 crq.request_capability.number =
de89e854 2763 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2764 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2765 ibmvnic_send_crq(adapter, &crq);
2766
2767 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2768 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2769 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2770 ibmvnic_send_crq(adapter, &crq);
2771
2772 if (adapter->netdev->flags & IFF_PROMISC) {
2773 if (adapter->promisc_supported) {
2774 crq.request_capability.capability =
2775 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2776 crq.request_capability.number = cpu_to_be64(1);
901e040a 2777 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2778 ibmvnic_send_crq(adapter, &crq);
2779 }
2780 } else {
2781 crq.request_capability.capability =
2782 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2783 crq.request_capability.number = cpu_to_be64(0);
901e040a 2784 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2785 ibmvnic_send_crq(adapter, &crq);
2786 }
032c5e82
TF		 2787}
2788
2789static int pending_scrq(struct ibmvnic_adapter *adapter,
2790 struct ibmvnic_sub_crq_queue *scrq)
2791{
2792 union sub_crq *entry = &scrq->msgs[scrq->cur];
2793
1cf9cc72 2794 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
032c5e82
TF		 2795 return 1;
2796 else
2797 return 0;
2798}
2799
2800static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2801 struct ibmvnic_sub_crq_queue *scrq)
2802{
2803 union sub_crq *entry;
2804 unsigned long flags;
2805
2806 spin_lock_irqsave(&scrq->lock, flags);
2807 entry = &scrq->msgs[scrq->cur];
2808 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2809 if (++scrq->cur == scrq->size)
2810 scrq->cur = 0;
2811 } else {
2812 entry = NULL;
2813 }
2814 spin_unlock_irqrestore(&scrq->lock, flags);
2815
2816 return entry;
2817}
2818
2819static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2820{
2821 struct ibmvnic_crq_queue *queue = &adapter->crq;
2822 union ibmvnic_crq *crq;
2823
2824 crq = &queue->msgs[queue->cur];
2825 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2826 if (++queue->cur == queue->size)
2827 queue->cur = 0;
2828 } else {
2829 crq = NULL;
2830 }
2831
2832 return crq;
2833}
2834
2835static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2836 union sub_crq *sub_crq)
2837{
2838 unsigned int ua = adapter->vdev->unit_address;
2839 struct device *dev = &adapter->vdev->dev;
2840 u64 *u64_crq = (u64 *)sub_crq;
2841 int rc;
2842
2843 netdev_dbg(adapter->netdev,
2844 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2845 (unsigned long int)cpu_to_be64(remote_handle),
2846 (unsigned long int)cpu_to_be64(u64_crq[0]),
2847 (unsigned long int)cpu_to_be64(u64_crq[1]),
2848 (unsigned long int)cpu_to_be64(u64_crq[2]),
2849 (unsigned long int)cpu_to_be64(u64_crq[3]));
2850
2851 /* Make sure the hypervisor sees the complete request */
2852 mb();
2853
2854 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2855 cpu_to_be64(remote_handle),
2856 cpu_to_be64(u64_crq[0]),
2857 cpu_to_be64(u64_crq[1]),
2858 cpu_to_be64(u64_crq[2]),
2859 cpu_to_be64(u64_crq[3]));
2860
2861 if (rc) {
2862 if (rc == H_CLOSED)
2863 dev_warn(dev, "CRQ Queue closed\n");
2864 dev_err(dev, "Send error (rc=%d)\n", rc);
2865 }
2866
2867 return rc;
2868}
2869
ad7775dc
TF		 2870static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2871 u64 remote_handle, u64 ioba, u64 num_entries)
2872{
2873 unsigned int ua = adapter->vdev->unit_address;
2874 struct device *dev = &adapter->vdev->dev;
2875 int rc;
2876
2877 /* Make sure the hypervisor sees the complete request */
2878 mb();
2879 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2880 cpu_to_be64(remote_handle),
2881 ioba, num_entries);
2882
2883 if (rc) {
2884 if (rc == H_CLOSED)
2885 dev_warn(dev, "CRQ Queue closed\n");
2886 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2887 }
2888
2889 return rc;
2890}
2891
032c5e82
TF		 2892static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2893 union ibmvnic_crq *crq)
2894{
2895 unsigned int ua = adapter->vdev->unit_address;
2896 struct device *dev = &adapter->vdev->dev;
2897 u64 *u64_crq = (u64 *)crq;
2898 int rc;
2899
2900 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2901 (unsigned long int)cpu_to_be64(u64_crq[0]),
2902 (unsigned long int)cpu_to_be64(u64_crq[1]));
2903
2904 /* Make sure the hypervisor sees the complete request */
2905 mb();
2906
2907 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2908 cpu_to_be64(u64_crq[0]),
2909 cpu_to_be64(u64_crq[1]));
2910
2911 if (rc) {
2912 if (rc == H_CLOSED)
2913 dev_warn(dev, "CRQ Queue closed\n");
2914 dev_warn(dev, "Send error (rc=%d)\n", rc);
2915 }
2916
2917 return rc;
2918}
2919
2920static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2921{
2922 union ibmvnic_crq crq;
2923
2924 memset(&crq, 0, sizeof(crq));
2925 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2926 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2927 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2928
2929 return ibmvnic_send_crq(adapter, &crq);
2930}
2931
032c5e82
TF		 2932static int send_version_xchg(struct ibmvnic_adapter *adapter)
2933{
2934 union ibmvnic_crq crq;
2935
2936 memset(&crq, 0, sizeof(crq));
2937 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2938 crq.version_exchange.cmd = VERSION_EXCHANGE;
2939 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2940
2941 return ibmvnic_send_crq(adapter, &crq);
2942}
2943
37798d02
NF		 2944struct vnic_login_client_data {
2945 u8 type;
2946 __be16 len;
2947 char name;
2948} __packed;
2949
2950static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2951{
2952 int len;
2953
2954 /* Calculate the amount of buffer space needed for the
2955 * vnic client data in the login buffer. There are four entries,
2956 * OS name, LPAR name, device name, and a null last entry.
2957 */
2958 len = 4 * sizeof(struct vnic_login_client_data);
2959 len += 6; /* "Linux" plus NULL */
2960 len += strlen(utsname()->nodename) + 1;
2961 len += strlen(adapter->netdev->name) + 1;
2962
2963 return len;
2964}
2965
2966static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2967 struct vnic_login_client_data *vlcd)
2968{
2969 const char *os_name = "Linux";
2970 int len;
2971
2972 /* Type 1 - LPAR OS */
2973 vlcd->type = 1;
2974 len = strlen(os_name) + 1;
2975 vlcd->len = cpu_to_be16(len);
2976 strncpy(&vlcd->name, os_name, len);
2977 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2978
2979 /* Type 2 - LPAR name */
2980 vlcd->type = 2;
2981 len = strlen(utsname()->nodename) + 1;
2982 vlcd->len = cpu_to_be16(len);
2983 strncpy(&vlcd->name, utsname()->nodename, len);
2984 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2985
2986 /* Type 3 - device name */
2987 vlcd->type = 3;
2988 len = strlen(adapter->netdev->name) + 1;
2989 vlcd->len = cpu_to_be16(len);
2990 strncpy(&vlcd->name, adapter->netdev->name, len);
2991}
2992
032c5e82
TF		 2993static void send_login(struct ibmvnic_adapter *adapter)
2994{
2995 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2996 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2997 struct device *dev = &adapter->vdev->dev;
2998 dma_addr_t rsp_buffer_token;
2999 dma_addr_t buffer_token;
3000 size_t rsp_buffer_size;
3001 union ibmvnic_crq crq;
032c5e82
TF		 3002 size_t buffer_size;
3003 __be64 *tx_list_p;
3004 __be64 *rx_list_p;
37798d02
NF		 3005 int client_data_len;
3006 struct vnic_login_client_data *vlcd;
032c5e82
TF		 3007 int i;
3008
37798d02
NF		 3009 client_data_len = vnic_client_data_len(adapter);
3010
032c5e82
TF		 3011 buffer_size =
3012 sizeof(struct ibmvnic_login_buffer) +
37798d02
NF		 3013 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3014 client_data_len;
032c5e82 3015
37798d02 3016 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
032c5e82
TF		 3017 if (!login_buffer)
3018 goto buf_alloc_failed;
3019
3020 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3021 DMA_TO_DEVICE);
3022 if (dma_mapping_error(dev, buffer_token)) {
3023 dev_err(dev, "Couldn't map login buffer\n");
3024 goto buf_map_failed;
3025 }
3026
498cd8e4
JA		 3027 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3028 sizeof(u64) * adapter->req_tx_queues +
3029 sizeof(u64) * adapter->req_rx_queues +
3030 sizeof(u64) * adapter->req_rx_queues +
3031 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 3032
3033 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3034 if (!login_rsp_buffer)
3035 goto buf_rsp_alloc_failed;
3036
3037 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3038 rsp_buffer_size, DMA_FROM_DEVICE);
3039 if (dma_mapping_error(dev, rsp_buffer_token)) {
3040 dev_err(dev, "Couldn't map login rsp buffer\n");
3041 goto buf_rsp_map_failed;
3042 }
661a2622 3043
032c5e82
TF		 3044 adapter->login_buf = login_buffer;
3045 adapter->login_buf_token = buffer_token;
3046 adapter->login_buf_sz = buffer_size;
3047 adapter->login_rsp_buf = login_rsp_buffer;
3048 adapter->login_rsp_buf_token = rsp_buffer_token;
3049 adapter->login_rsp_buf_sz = rsp_buffer_size;
3050
3051 login_buffer->len = cpu_to_be32(buffer_size);
3052 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3053 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3054 login_buffer->off_txcomp_subcrqs =
3055 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3056 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3057 login_buffer->off_rxcomp_subcrqs =
3058 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3059 sizeof(u64) * adapter->req_tx_queues);
3060 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3061 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3062
3063 tx_list_p = (__be64 *)((char *)login_buffer +
3064 sizeof(struct ibmvnic_login_buffer));
3065 rx_list_p = (__be64 *)((char *)login_buffer +
3066 sizeof(struct ibmvnic_login_buffer) +
3067 sizeof(u64) * adapter->req_tx_queues);
3068
3069 for (i = 0; i < adapter->req_tx_queues; i++) {
3070 if (adapter->tx_scrq[i]) {
3071 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3072 crq_num);
3073 }
3074 }
3075
3076 for (i = 0; i < adapter->req_rx_queues; i++) {
3077 if (adapter->rx_scrq[i]) {
3078 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3079 crq_num);
3080 }
3081 }
3082
37798d02
NF		 3083 /* Insert vNIC login client data */
3084 vlcd = (struct vnic_login_client_data *)
3085 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3086 login_buffer->client_data_offset =
3087 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3088 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3089
3090 vnic_add_client_data(adapter, vlcd);
3091
032c5e82
TF		 3092 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3093 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3094 netdev_dbg(adapter->netdev, "%016lx\n",
3095 ((unsigned long int *)(adapter->login_buf))[i]);
3096 }
3097
3098 memset(&crq, 0, sizeof(crq));
3099 crq.login.first = IBMVNIC_CRQ_CMD;
3100 crq.login.cmd = LOGIN;
3101 crq.login.ioba = cpu_to_be32(buffer_token);
3102 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 3103 ibmvnic_send_crq(adapter, &crq);
3104
3105 return;
3106
032c5e82
TF		 3107buf_rsp_map_failed:
3108 kfree(login_rsp_buffer);
3109buf_rsp_alloc_failed:
3110 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3111buf_map_failed:
3112 kfree(login_buffer);
3113buf_alloc_failed:
3114 return;
3115}
3116
3117static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3118 u32 len, u8 map_id)
3119{
3120 union ibmvnic_crq crq;
3121
3122 memset(&crq, 0, sizeof(crq));
3123 crq.request_map.first = IBMVNIC_CRQ_CMD;
3124 crq.request_map.cmd = REQUEST_MAP;
3125 crq.request_map.map_id = map_id;
3126 crq.request_map.ioba = cpu_to_be32(addr);
3127 crq.request_map.len = cpu_to_be32(len);
3128 ibmvnic_send_crq(adapter, &crq);
3129}
3130
3131static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3132{
3133 union ibmvnic_crq crq;
3134
3135 memset(&crq, 0, sizeof(crq));
3136 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3137 crq.request_unmap.cmd = REQUEST_UNMAP;
3138 crq.request_unmap.map_id = map_id;
3139 ibmvnic_send_crq(adapter, &crq);
3140}
3141
3142static void send_map_query(struct ibmvnic_adapter *adapter)
3143{
3144 union ibmvnic_crq crq;
3145
3146 memset(&crq, 0, sizeof(crq));
3147 crq.query_map.first = IBMVNIC_CRQ_CMD;
3148 crq.query_map.cmd = QUERY_MAP;
3149 ibmvnic_send_crq(adapter, &crq);
3150}
3151
3152/* Send a series of CRQs requesting various capabilities of the VNIC server */
3153static void send_cap_queries(struct ibmvnic_adapter *adapter)
3154{
3155 union ibmvnic_crq crq;
3156
901e040a 3157 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 3158 memset(&crq, 0, sizeof(crq));
3159 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3160 crq.query_capability.cmd = QUERY_CAPABILITY;
3161
3162 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 3163 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3164 ibmvnic_send_crq(adapter, &crq);
3165
3166 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 3167 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3168 ibmvnic_send_crq(adapter, &crq);
3169
3170 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 3171 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3172 ibmvnic_send_crq(adapter, &crq);
3173
3174 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 3175 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3176 ibmvnic_send_crq(adapter, &crq);
3177
3178 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 3179 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3180 ibmvnic_send_crq(adapter, &crq);
3181
3182 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 3183 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3184 ibmvnic_send_crq(adapter, &crq);
3185
3186 crq.query_capability.capability =
3187 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 3188 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3189 ibmvnic_send_crq(adapter, &crq);
3190
3191 crq.query_capability.capability =
3192 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3193 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3194 ibmvnic_send_crq(adapter, &crq);
3195
3196 crq.query_capability.capability =
3197 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 3198 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3199 ibmvnic_send_crq(adapter, &crq);
3200
3201 crq.query_capability.capability =
3202 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3203 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3204 ibmvnic_send_crq(adapter, &crq);
3205
3206 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 3207 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3208 ibmvnic_send_crq(adapter, &crq);
3209
3210 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 3211 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3212 ibmvnic_send_crq(adapter, &crq);
3213
3214 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 3215 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3216 ibmvnic_send_crq(adapter, &crq);
3217
3218 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 3219 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3220 ibmvnic_send_crq(adapter, &crq);
3221
3222 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 3223 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3224 ibmvnic_send_crq(adapter, &crq);
3225
3226 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 3227 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3228 ibmvnic_send_crq(adapter, &crq);
3229
6052d5e2
MFV		 3230 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3231 atomic_inc(&adapter->running_cap_crqs);
3232 ibmvnic_send_crq(adapter, &crq);
3233
032c5e82 3234 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 3235 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3236 ibmvnic_send_crq(adapter, &crq);
3237
3238 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 3239 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3240 ibmvnic_send_crq(adapter, &crq);
3241
3242 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 3243 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3244 ibmvnic_send_crq(adapter, &crq);
3245
3246 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 3247 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3248 ibmvnic_send_crq(adapter, &crq);
3249
3250 crq.query_capability.capability =
3251 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 3252 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3253 ibmvnic_send_crq(adapter, &crq);
3254
3255 crq.query_capability.capability =
3256 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 3257 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3258 ibmvnic_send_crq(adapter, &crq);
3259
3260 crq.query_capability.capability =
3261 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 3262 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3263 ibmvnic_send_crq(adapter, &crq);
3264
3265 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 3266 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3267 ibmvnic_send_crq(adapter, &crq);
3268}
3269
4e6759be
DANR		 3270static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3271 struct ibmvnic_adapter *adapter)
3272{
3273 struct device *dev = &adapter->vdev->dev;
3274
3275 if (crq->get_vpd_size_rsp.rc.code) {
3276 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3277 crq->get_vpd_size_rsp.rc.code);
3278 complete(&adapter->fw_done);
3279 return;
3280 }
3281
3282 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3283 complete(&adapter->fw_done);
3284}
3285
3286static void handle_vpd_rsp(union ibmvnic_crq *crq,
3287 struct ibmvnic_adapter *adapter)
3288{
3289 struct device *dev = &adapter->vdev->dev;
21a2545b 3290 unsigned char *substr = NULL;
4e6759be
DANR		 3291 u8 fw_level_len = 0;
3292
3293 memset(adapter->fw_version, 0, 32);
3294
3295 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3296 DMA_FROM_DEVICE);
3297
3298 if (crq->get_vpd_rsp.rc.code) {
3299 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3300 crq->get_vpd_rsp.rc.code);
3301 goto complete;
3302 }
3303
3304 /* get the position of the firmware version info
3305 * located after the ASCII 'RM' substring in the buffer
3306 */
3307 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3308 if (!substr) {
a107311d 3309 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4e6759be
DANR		 3310 goto complete;
3311 }
3312
3313 /* get length of firmware level ASCII substring */
3314 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3315 fw_level_len = *(substr + 2);
3316 } else {
3317 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3318 goto complete;
3319 }
3320
3321 /* copy firmware version string from vpd into adapter */
3322 if ((substr + 3 + fw_level_len) <
3323 (adapter->vpd->buff + adapter->vpd->len)) {
21a2545b 3324 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4e6759be
DANR		 3325 } else {
3326 dev_info(dev, "FW substr extrapolated VPD buff\n");
3327 }
3328
3329complete:
21a2545b
DANR		 3330 if (adapter->fw_version[0] == '\0')
3331 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4e6759be
DANR		 3332 complete(&adapter->fw_done);
3333}
3334
032c5e82
TF		 3335static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3336{
3337 struct device *dev = &adapter->vdev->dev;
3338 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3339 union ibmvnic_crq crq;
3340 int i;
3341
3342 dma_unmap_single(dev, adapter->ip_offload_tok,
3343 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3344
3345 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3346 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3347 netdev_dbg(adapter->netdev, "%016lx\n",
3348 ((unsigned long int *)(buf))[i]);
3349
3350 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3351 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3352 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3353 buf->tcp_ipv4_chksum);
3354 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3355 buf->tcp_ipv6_chksum);
3356 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3357 buf->udp_ipv4_chksum);
3358 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3359 buf->udp_ipv6_chksum);
3360 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3361 buf->large_tx_ipv4);
3362 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3363 buf->large_tx_ipv6);
3364 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3365 buf->large_rx_ipv4);
3366 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3367 buf->large_rx_ipv6);
3368 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3369 buf->max_ipv4_header_size);
3370 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3371 buf->max_ipv6_header_size);
3372 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3373 buf->max_tcp_header_size);
3374 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3375 buf->max_udp_header_size);
3376 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3377 buf->max_large_tx_size);
3378 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3379 buf->max_large_rx_size);
3380 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3381 buf->ipv6_extension_header);
3382 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3383 buf->tcp_pseudosum_req);
3384 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3385 buf->num_ipv6_ext_headers);
3386 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3387 buf->off_ipv6_ext_headers);
3388
3389 adapter->ip_offload_ctrl_tok =
3390 dma_map_single(dev, &adapter->ip_offload_ctrl,
3391 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3392
3393 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3394 dev_err(dev, "Couldn't map ip offload control buffer\n");
3395 return;
3396 }
3397
f6897943
TF		 3398 adapter->ip_offload_ctrl.len =
3399 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
032c5e82 3400 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
f6897943
TF		 3401 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3402 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
032c5e82
TF		 3403 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3404 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3405 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3406 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
fdb06105
TF		 3407 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3408 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
032c5e82 3409
fdb06105 3410 /* large_rx disabled for now, additional features needed */
032c5e82
TF		 3411 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3412 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3413
15482056 3414 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
032c5e82
TF		 3415
3416 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3417 adapter->netdev->features |= NETIF_F_IP_CSUM;
3418
3419 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3420 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3421
9be02cdf
TF		 3422 if ((adapter->netdev->features &
3423 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3424 adapter->netdev->features |= NETIF_F_RXCSUM;
3425
fdb06105
TF		 3426 if (buf->large_tx_ipv4)
3427 adapter->netdev->features |= NETIF_F_TSO;
3428 if (buf->large_tx_ipv6)
3429 adapter->netdev->features |= NETIF_F_TSO6;
3430
aa0bf851
TF		 3431 adapter->netdev->hw_features |= adapter->netdev->features;
3432
032c5e82
TF		 3433 memset(&crq, 0, sizeof(crq));
3434 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3435 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3436 crq.control_ip_offload.len =
3437 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3438 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3439 ibmvnic_send_crq(adapter, &crq);
3440}
3441
3442static void handle_error_info_rsp(union ibmvnic_crq *crq,
3443 struct ibmvnic_adapter *adapter)
3444{
3445 struct device *dev = &adapter->vdev->dev;
96183182 3446 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 3447 unsigned long flags;
3448 bool found = false;
3449 int i;
3450
3451 if (!crq->request_error_rsp.rc.code) {
3452 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3453 crq->request_error_rsp.rc.code);
3454 return;
3455 }
3456
3457 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 3458 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 3459 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3460 found = true;
3461 list_del(&error_buff->list);
3462 break;
3463 }
3464 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3465
3466 if (!found) {
3467 dev_err(dev, "Couldn't find error id %x\n",
75224c93 3468 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3469 return;
3470 }
3471
3472 dev_err(dev, "Detailed info for error id %x:",
75224c93 3473 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3474
3475 for (i = 0; i < error_buff->len; i++) {
3476 pr_cont("%02x", (int)error_buff->buff[i]);
3477 if (i % 8 == 7)
3478 pr_cont(" ");
3479 }
3480 pr_cont("\n");
3481
3482 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3483 DMA_FROM_DEVICE);
3484 kfree(error_buff->buff);
3485 kfree(error_buff);
3486}
3487
2f9de9ba
NF		 3488static void request_error_information(struct ibmvnic_adapter *adapter,
3489 union ibmvnic_crq *err_crq)
032c5e82 3490{
032c5e82 3491 struct device *dev = &adapter->vdev->dev;
2f9de9ba 3492 struct net_device *netdev = adapter->netdev;
032c5e82 3493 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 3494 unsigned long timeout = msecs_to_jiffies(30000);
3495 union ibmvnic_crq crq;
032c5e82 3496 unsigned long flags;
2f9de9ba 3497 int rc, detail_len;
032c5e82
TF		 3498
3499 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3500 if (!error_buff)
3501 return;
3502
2f9de9ba 3503 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 3504 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3505 if (!error_buff->buff) {
3506 kfree(error_buff);
3507 return;
3508 }
3509
3510 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3511 DMA_FROM_DEVICE);
3512 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 3513 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 3514 kfree(error_buff->buff);
3515 kfree(error_buff);
3516 return;
3517 }
3518
032c5e82 3519 error_buff->len = detail_len;
2f9de9ba 3520 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 3521
3522 spin_lock_irqsave(&adapter->error_list_lock, flags);
3523 list_add_tail(&error_buff->list, &adapter->errors);
3524 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3525
2f9de9ba
NF		 3526 memset(&crq, 0, sizeof(crq));
3527 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3528 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3529 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3530 crq.request_error_info.len = cpu_to_be32(detail_len);
3531 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3532
3533 rc = ibmvnic_send_crq(adapter, &crq);
3534 if (rc) {
3535 netdev_err(netdev, "failed to request error information\n");
3536 goto err_info_fail;
3537 }
3538
3539 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3540 netdev_err(netdev, "timeout waiting for error information\n");
3541 goto err_info_fail;
3542 }
3543
3544 return;
3545
3546err_info_fail:
3547 spin_lock_irqsave(&adapter->error_list_lock, flags);
3548 list_del(&error_buff->list);
3549 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3550
3551 kfree(error_buff->buff);
3552 kfree(error_buff);
3553}
3554
3555static void handle_error_indication(union ibmvnic_crq *crq,
3556 struct ibmvnic_adapter *adapter)
3557{
3558 struct device *dev = &adapter->vdev->dev;
3559
3560 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3561 crq->error_indication.flags
3562 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3563 be32_to_cpu(crq->error_indication.error_id),
3564 be16_to_cpu(crq->error_indication.error_cause));
3565
3566 if (be32_to_cpu(crq->error_indication.error_id))
3567 request_error_information(adapter, crq);
ed651a10
NF		 3568
3569 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3570 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 3571 else
3572 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 3573}
3574
f813614f
TF		 3575static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3576 struct ibmvnic_adapter *adapter)
032c5e82
TF		 3577{
3578 struct net_device *netdev = adapter->netdev;
3579 struct device *dev = &adapter->vdev->dev;
3580 long rc;
3581
3582 rc = crq->change_mac_addr_rsp.rc.code;
3583 if (rc) {
3584 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
f813614f 3585 goto out;
032c5e82
TF		 3586 }
3587 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3588 ETH_ALEN);
f813614f
TF		 3589out:
3590 complete(&adapter->fw_done);
3591 return rc;
032c5e82
TF		 3592}
3593
3594static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3595 struct ibmvnic_adapter *adapter)
3596{
3597 struct device *dev = &adapter->vdev->dev;
3598 u64 *req_value;
3599 char *name;
3600
901e040a 3601 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 3602 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3603 case REQ_TX_QUEUES:
3604 req_value = &adapter->req_tx_queues;
3605 name = "tx";
3606 break;
3607 case REQ_RX_QUEUES:
3608 req_value = &adapter->req_rx_queues;
3609 name = "rx";
3610 break;
3611 case REQ_RX_ADD_QUEUES:
3612 req_value = &adapter->req_rx_add_queues;
3613 name = "rx_add";
3614 break;
3615 case REQ_TX_ENTRIES_PER_SUBCRQ:
3616 req_value = &adapter->req_tx_entries_per_subcrq;
3617 name = "tx_entries_per_subcrq";
3618 break;
3619 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3620 req_value = &adapter->req_rx_add_entries_per_subcrq;
3621 name = "rx_add_entries_per_subcrq";
3622 break;
3623 case REQ_MTU:
3624 req_value = &adapter->req_mtu;
3625 name = "mtu";
3626 break;
3627 case PROMISC_REQUESTED:
3628 req_value = &adapter->promisc;
3629 name = "promisc";
3630 break;
3631 default:
3632 dev_err(dev, "Got invalid cap request rsp %d\n",
3633 crq->request_capability.capability);
3634 return;
3635 }
3636
3637 switch (crq->request_capability_rsp.rc.code) {
3638 case SUCCESS:
3639 break;
3640 case PARTIALSUCCESS:
3641 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3642 *req_value,
28f4d165 3643 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 3644 number), name);
e7913803
JA		 3645
3646 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3647 REQ_MTU) {
3648 pr_err("mtu of %llu is not supported. Reverting.\n",
3649 *req_value);
3650 *req_value = adapter->fallback.mtu;
3651 } else {
3652 *req_value =
3653 be64_to_cpu(crq->request_capability_rsp.number);
3654 }
3655
d346b9bc 3656 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 3657 return;
3658 default:
3659 dev_err(dev, "Error %d in request cap rsp\n",
3660 crq->request_capability_rsp.rc.code);
3661 return;
3662 }
3663
3664 /* Done receiving requested capabilities, query IP offload support */
901e040a 3665 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 3666 union ibmvnic_crq newcrq;
3667 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3668 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3669 &adapter->ip_offload_buf;
3670
249168ad 3671 adapter->wait_capability = false;
032c5e82
TF		 3672 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3673 buf_sz,
3674 DMA_FROM_DEVICE);
3675
3676 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3677 if (!firmware_has_feature(FW_FEATURE_CMO))
3678 dev_err(dev, "Couldn't map offload buffer\n");
3679 return;
3680 }
3681
3682 memset(&newcrq, 0, sizeof(newcrq));
3683 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3684 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3685 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3686 newcrq.query_ip_offload.ioba =
3687 cpu_to_be32(adapter->ip_offload_tok);
3688
3689 ibmvnic_send_crq(adapter, &newcrq);
3690 }
3691}
3692
3693static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3694 struct ibmvnic_adapter *adapter)
3695{
3696 struct device *dev = &adapter->vdev->dev;
c26eba03 3697 struct net_device *netdev = adapter->netdev;
032c5e82
TF		 3698 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3699 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 3700 int i;
3701
3702 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3703 DMA_BIDIRECTIONAL);
3704 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3705 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3706
498cd8e4
JA		 3707 /* If the number of queues requested can't be allocated by the
3708 * server, the login response will return with code 1. We will need
3709 * to resend the login buffer with fewer queues requested.
3710 */
3711 if (login_rsp_crq->generic.rc.code) {
3712 adapter->renegotiate = true;
3713 complete(&adapter->init_done);
3714 return 0;
3715 }
3716
c26eba03
JA		 3717 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3718
032c5e82
TF		 3719 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3720 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3721 netdev_dbg(adapter->netdev, "%016lx\n",
3722 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3723 }
3724
3725 /* Sanity checks */
3726 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3727 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3728 adapter->req_rx_add_queues !=
3729 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3730 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3731 ibmvnic_remove(adapter->vdev);
3732 return -EIO;
3733 }
3734 complete(&adapter->init_done);
3735
032c5e82
TF		 3736 return 0;
3737}
3738
032c5e82
TF		 3739static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3740 struct ibmvnic_adapter *adapter)
3741{
3742 struct device *dev = &adapter->vdev->dev;
3743 long rc;
3744
3745 rc = crq->request_unmap_rsp.rc.code;
3746 if (rc)
3747 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3748}
3749
3750static void handle_query_map_rsp(union ibmvnic_crq *crq,
3751 struct ibmvnic_adapter *adapter)
3752{
3753 struct net_device *netdev = adapter->netdev;
3754 struct device *dev = &adapter->vdev->dev;
3755 long rc;
3756
3757 rc = crq->query_map_rsp.rc.code;
3758 if (rc) {
3759 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3760 return;
3761 }
3762 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3763 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3764 crq->query_map_rsp.free_pages);
3765}
3766
3767static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3768 struct ibmvnic_adapter *adapter)
3769{
3770 struct net_device *netdev = adapter->netdev;
3771 struct device *dev = &adapter->vdev->dev;
3772 long rc;
3773
901e040a 3774 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3775 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3776 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3777 rc = crq->query_capability.rc.code;
3778 if (rc) {
3779 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3780 goto out;
3781 }
3782
3783 switch (be16_to_cpu(crq->query_capability.capability)) {
3784 case MIN_TX_QUEUES:
3785 adapter->min_tx_queues =
de89e854 3786 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3787 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3788 adapter->min_tx_queues);
3789 break;
3790 case MIN_RX_QUEUES:
3791 adapter->min_rx_queues =
de89e854 3792 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3793 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3794 adapter->min_rx_queues);
3795 break;
3796 case MIN_RX_ADD_QUEUES:
3797 adapter->min_rx_add_queues =
de89e854 3798 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3799 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3800 adapter->min_rx_add_queues);
3801 break;
3802 case MAX_TX_QUEUES:
3803 adapter->max_tx_queues =
de89e854 3804 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3805 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3806 adapter->max_tx_queues);
3807 break;
3808 case MAX_RX_QUEUES:
3809 adapter->max_rx_queues =
de89e854 3810 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3811 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3812 adapter->max_rx_queues);
3813 break;
3814 case MAX_RX_ADD_QUEUES:
3815 adapter->max_rx_add_queues =
de89e854 3816 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3817 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3818 adapter->max_rx_add_queues);
3819 break;
3820 case MIN_TX_ENTRIES_PER_SUBCRQ:
3821 adapter->min_tx_entries_per_subcrq =
de89e854 3822 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3823 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3824 adapter->min_tx_entries_per_subcrq);
3825 break;
3826 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3827 adapter->min_rx_add_entries_per_subcrq =
de89e854 3828 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3829 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3830 adapter->min_rx_add_entries_per_subcrq);
3831 break;
3832 case MAX_TX_ENTRIES_PER_SUBCRQ:
3833 adapter->max_tx_entries_per_subcrq =
de89e854 3834 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3835 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3836 adapter->max_tx_entries_per_subcrq);
3837 break;
3838 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3839 adapter->max_rx_add_entries_per_subcrq =
de89e854 3840 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3841 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3842 adapter->max_rx_add_entries_per_subcrq);
3843 break;
3844 case TCP_IP_OFFLOAD:
3845 adapter->tcp_ip_offload =
de89e854 3846 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3847 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3848 adapter->tcp_ip_offload);
3849 break;
3850 case PROMISC_SUPPORTED:
3851 adapter->promisc_supported =
de89e854 3852 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3853 netdev_dbg(netdev, "promisc_supported = %lld\n",
3854 adapter->promisc_supported);
3855 break;
3856 case MIN_MTU:
de89e854 3857 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3858 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3859 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3860 break;
3861 case MAX_MTU:
de89e854 3862 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3863 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3864 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3865 break;
3866 case MAX_MULTICAST_FILTERS:
3867 adapter->max_multicast_filters =
de89e854 3868 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3869 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3870 adapter->max_multicast_filters);
3871 break;
3872 case VLAN_HEADER_INSERTION:
3873 adapter->vlan_header_insertion =
de89e854 3874 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3875 if (adapter->vlan_header_insertion)
3876 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3877 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3878 adapter->vlan_header_insertion);
3879 break;
6052d5e2
MFV		 3880 case RX_VLAN_HEADER_INSERTION:
3881 adapter->rx_vlan_header_insertion =
3882 be64_to_cpu(crq->query_capability.number);
3883 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3884 adapter->rx_vlan_header_insertion);
3885 break;
032c5e82
TF		 3886 case MAX_TX_SG_ENTRIES:
3887 adapter->max_tx_sg_entries =
de89e854 3888 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3889 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3890 adapter->max_tx_sg_entries);
3891 break;
3892 case RX_SG_SUPPORTED:
3893 adapter->rx_sg_supported =
de89e854 3894 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3895 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3896 adapter->rx_sg_supported);
3897 break;
3898 case OPT_TX_COMP_SUB_QUEUES:
3899 adapter->opt_tx_comp_sub_queues =
de89e854 3900 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3901 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3902 adapter->opt_tx_comp_sub_queues);
3903 break;
3904 case OPT_RX_COMP_QUEUES:
3905 adapter->opt_rx_comp_queues =
de89e854 3906 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3907 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3908 adapter->opt_rx_comp_queues);
3909 break;
3910 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3911 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3912 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3913 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3914 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3915 break;
3916 case OPT_TX_ENTRIES_PER_SUBCRQ:
3917 adapter->opt_tx_entries_per_subcrq =
de89e854 3918 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3919 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3920 adapter->opt_tx_entries_per_subcrq);
3921 break;
3922 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3923 adapter->opt_rxba_entries_per_subcrq =
de89e854 3924 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3925 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3926 adapter->opt_rxba_entries_per_subcrq);
3927 break;
3928 case TX_RX_DESC_REQ:
3929 adapter->tx_rx_desc_req = crq->query_capability.number;
3930 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3931 adapter->tx_rx_desc_req);
3932 break;
3933
3934 default:
3935 netdev_err(netdev, "Got invalid cap rsp %d\n",
3936 crq->query_capability.capability);
3937 }
3938
3939out:
249168ad
TF		 3940 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3941 adapter->wait_capability = false;
d346b9bc 3942 ibmvnic_send_req_caps(adapter, 0);
249168ad 3943 }
032c5e82
TF		 3944}
3945
032c5e82
TF		 3946static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3947 struct ibmvnic_adapter *adapter)
3948{
3949 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3950 struct net_device *netdev = adapter->netdev;
3951 struct device *dev = &adapter->vdev->dev;
993a82b0 3952 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3953 long rc;
3954
3955 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3956 (unsigned long int)cpu_to_be64(u64_crq[0]),
3957 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3958 switch (gen_crq->first) {
3959 case IBMVNIC_CRQ_INIT_RSP:
3960 switch (gen_crq->cmd) {
3961 case IBMVNIC_CRQ_INIT:
3962 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3963 adapter->from_passive_init = true;
3964 complete(&adapter->init_done);
032c5e82
TF		 3965 break;
3966 case IBMVNIC_CRQ_INIT_COMPLETE:
3967 dev_info(dev, "Partner initialization complete\n");
3968 send_version_xchg(adapter);
3969 break;
3970 default:
3971 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3972 }
3973 return;
3974 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3975 netif_carrier_off(netdev);
032c5e82 3976 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3977 dev_info(dev, "Migrated, re-enabling adapter\n");
3978 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3979 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3980 dev_info(dev, "Backing device failover detected\n");
ed651a10 3981 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3982 } else {
3983 /* The adapter lost the connection */
3984 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3985 gen_crq->cmd);
ed651a10 3986 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3987 }
3988 return;
3989 case IBMVNIC_CRQ_CMD_RSP:
3990 break;
3991 default:
3992 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3993 gen_crq->first);
3994 return;
3995 }
3996
3997 switch (gen_crq->cmd) {
3998 case VERSION_EXCHANGE_RSP:
3999 rc = crq->version_exchange_rsp.rc.code;
4000 if (rc) {
4001 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4002 break;
4003 }
4004 dev_info(dev, "Partner protocol version is %d\n",
4005 crq->version_exchange_rsp.version);
4006 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4007 ibmvnic_version)
4008 ibmvnic_version =
4009 be16_to_cpu(crq->version_exchange_rsp.version);
4010 send_cap_queries(adapter);
4011 break;
4012 case QUERY_CAPABILITY_RSP:
4013 handle_query_cap_rsp(crq, adapter);
4014 break;
4015 case QUERY_MAP_RSP:
4016 handle_query_map_rsp(crq, adapter);
4017 break;
4018 case REQUEST_MAP_RSP:
f3be0cbc
TF		 4019 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4020 complete(&adapter->fw_done);
032c5e82
TF		 4021 break;
4022 case REQUEST_UNMAP_RSP:
4023 handle_request_unmap_rsp(crq, adapter);
4024 break;
4025 case REQUEST_CAPABILITY_RSP:
4026 handle_request_cap_rsp(crq, adapter);
4027 break;
4028 case LOGIN_RSP:
4029 netdev_dbg(netdev, "Got Login Response\n");
4030 handle_login_rsp(crq, adapter);
4031 break;
4032 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 4033 netdev_dbg(netdev,
4034 "Got Logical Link State Response, state: %d rc: %d\n",
4035 crq->logical_link_state_rsp.link_state,
4036 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 4037 adapter->logical_link_state =
4038 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 4039 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4040 complete(&adapter->init_done);
032c5e82
TF		 4041 break;
4042 case LINK_STATE_INDICATION:
4043 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4044 adapter->phys_link_state =
4045 crq->link_state_indication.phys_link_state;
4046 adapter->logical_link_state =
4047 crq->link_state_indication.logical_link_state;
4048 break;
4049 case CHANGE_MAC_ADDR_RSP:
4050 netdev_dbg(netdev, "Got MAC address change Response\n");
f813614f 4051 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
032c5e82
TF		 4052 break;
4053 case ERROR_INDICATION:
4054 netdev_dbg(netdev, "Got Error Indication\n");
4055 handle_error_indication(crq, adapter);
4056 break;
4057 case REQUEST_ERROR_RSP:
4058 netdev_dbg(netdev, "Got Error Detail Response\n");
4059 handle_error_info_rsp(crq, adapter);
4060 break;
4061 case REQUEST_STATISTICS_RSP:
4062 netdev_dbg(netdev, "Got Statistics Response\n");
4063 complete(&adapter->stats_done);
4064 break;
032c5e82
TF		 4065 case QUERY_IP_OFFLOAD_RSP:
4066 netdev_dbg(netdev, "Got Query IP offload Response\n");
4067 handle_query_ip_offload_rsp(adapter);
4068 break;
4069 case MULTICAST_CTRL_RSP:
4070 netdev_dbg(netdev, "Got multicast control Response\n");
4071 break;
4072 case CONTROL_IP_OFFLOAD_RSP:
4073 netdev_dbg(netdev, "Got Control IP offload Response\n");
4074 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4075 sizeof(adapter->ip_offload_ctrl),
4076 DMA_TO_DEVICE);
bd0b6723 4077 complete(&adapter->init_done);
032c5e82 4078 break;
032c5e82
TF		 4079 case COLLECT_FW_TRACE_RSP:
4080 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4081 complete(&adapter->fw_done);
4082 break;
4e6759be
DANR		 4083 case GET_VPD_SIZE_RSP:
4084 handle_vpd_size_rsp(crq, adapter);
4085 break;
4086 case GET_VPD_RSP:
4087 handle_vpd_rsp(crq, adapter);
4088 break;
032c5e82
TF		 4089 default:
4090 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4091 gen_crq->cmd);
4092 }
4093}
4094
4095static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4096{
4097 struct ibmvnic_adapter *adapter = instance;
6c267b3d 4098
6c267b3d 4099 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 4100 return IRQ_HANDLED;
4101}
4102
4103static void ibmvnic_tasklet(void *data)
4104{
4105 struct ibmvnic_adapter *adapter = data;
032c5e82 4106 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 4107 union ibmvnic_crq *crq;
4108 unsigned long flags;
4109 bool done = false;
4110
4111 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 4112 while (!done) {
4113 /* Pull all the valid messages off the CRQ */
4114 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4115 ibmvnic_handle_crq(crq, adapter);
4116 crq->generic.first = 0;
4117 }
ed7ecbf7
BK		 4118
4119 /* remain in tasklet until all
4120 * capabilities responses are received
4121 */
4122 if (!adapter->wait_capability)
4123 done = true;
032c5e82 4124 }
249168ad
TF		 4125 /* if capabilities CRQ's were sent in this tasklet, the following
4126 * tasklet must wait until all responses are received
4127 */
4128 if (atomic_read(&adapter->running_cap_crqs) != 0)
4129 adapter->wait_capability = true;
032c5e82 4130 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 4131}
4132
4133static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4134{
4135 struct vio_dev *vdev = adapter->vdev;
4136 int rc;
4137
4138 do {
4139 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4140 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4141
4142 if (rc)
4143 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4144
4145 return rc;
4146}
4147
4148static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4149{
4150 struct ibmvnic_crq_queue *crq = &adapter->crq;
4151 struct device *dev = &adapter->vdev->dev;
4152 struct vio_dev *vdev = adapter->vdev;
4153 int rc;
4154
4155 /* Close the CRQ */
4156 do {
4157 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4158 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4159
4160 /* Clean out the queue */
4161 memset(crq->msgs, 0, PAGE_SIZE);
4162 crq->cur = 0;
4163
4164 /* And re-open it again */
4165 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4166 crq->msg_token, PAGE_SIZE);
4167
4168 if (rc == H_CLOSED)
4169 /* Adapter is good, but other end is not ready */
4170 dev_warn(dev, "Partner adapter not ready\n");
4171 else if (rc != 0)
4172 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4173
4174 return rc;
4175}
4176
f992887c 4177static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4178{
4179 struct ibmvnic_crq_queue *crq = &adapter->crq;
4180 struct vio_dev *vdev = adapter->vdev;
4181 long rc;
4182
f992887c
NF		 4183 if (!crq->msgs)
4184 return;
4185
032c5e82
TF		 4186 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4187 free_irq(vdev->irq, adapter);
6c267b3d 4188 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4189 do {
4190 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4191 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4192
4193 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4194 DMA_BIDIRECTIONAL);
4195 free_page((unsigned long)crq->msgs);
f992887c 4196 crq->msgs = NULL;
032c5e82
TF		 4197}
4198
f992887c 4199static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4200{
4201 struct ibmvnic_crq_queue *crq = &adapter->crq;
4202 struct device *dev = &adapter->vdev->dev;
4203 struct vio_dev *vdev = adapter->vdev;
4204 int rc, retrc = -ENOMEM;
4205
f992887c
NF		 4206 if (crq->msgs)
4207 return 0;
4208
032c5e82
TF		 4209 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4210 /* Should we allocate more than one page? */
4211
4212 if (!crq->msgs)
4213 return -ENOMEM;
4214
4215 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4216 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4217 DMA_BIDIRECTIONAL);
4218 if (dma_mapping_error(dev, crq->msg_token))
4219 goto map_failed;
4220
4221 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4222 crq->msg_token, PAGE_SIZE);
4223
4224 if (rc == H_RESOURCE)
4225 /* maybe kexecing and resource is busy. try a reset */
4226 rc = ibmvnic_reset_crq(adapter);
4227 retrc = rc;
4228
4229 if (rc == H_CLOSED) {
4230 dev_warn(dev, "Partner adapter not ready\n");
4231 } else if (rc) {
4232 dev_warn(dev, "Error %d opening adapter\n", rc);
4233 goto reg_crq_failed;
4234 }
4235
4236 retrc = 0;
4237
6c267b3d
TF		 4238 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4239 (unsigned long)adapter);
4240
032c5e82
TF		 4241 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4242 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4243 adapter);
4244 if (rc) {
4245 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4246 vdev->irq, rc);
4247 goto req_irq_failed;
4248 }
4249
4250 rc = vio_enable_interrupts(vdev);
4251 if (rc) {
4252 dev_err(dev, "Error %d enabling interrupts\n", rc);
4253 goto req_irq_failed;
4254 }
4255
4256 crq->cur = 0;
4257 spin_lock_init(&crq->lock);
4258
4259 return retrc;
4260
4261req_irq_failed:
6c267b3d 4262 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4263 do {
4264 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4265 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4266reg_crq_failed:
4267 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4268map_failed:
4269 free_page((unsigned long)crq->msgs);
f992887c 4270 crq->msgs = NULL;
032c5e82
TF		 4271 return retrc;
4272}
4273
f6ef6408 4274static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 4275{
f6ef6408 4276 struct device *dev = &adapter->vdev->dev;
ea22d51a 4277 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 4278 int rc;
4279
c26eba03 4280 if (adapter->resetting && !adapter->wait_for_reset) {
28cde751
NF		 4281 rc = ibmvnic_reset_crq(adapter);
4282 if (!rc)
4283 rc = vio_enable_interrupts(adapter->vdev);
4284 } else {
4285 rc = init_crq_queue(adapter);
4286 }
4287
f6ef6408
JA		 4288 if (rc) {
4289 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4290 return rc;
4291 }
4292
017892c1
JA		 4293 adapter->from_passive_init = false;
4294
f6ef6408 4295 init_completion(&adapter->init_done);
6a2fb0e9 4296 adapter->init_done_rc = 0;
f6ef6408
JA		 4297 ibmvnic_send_crq_init(adapter);
4298 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4299 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 4300 return -1;
4301 }
4302
6a2fb0e9
NF		 4303 if (adapter->init_done_rc) {
4304 release_crq_queue(adapter);
4305 return adapter->init_done_rc;
4306 }
4307
017892c1
JA		 4308 if (adapter->from_passive_init) {
4309 adapter->state = VNIC_OPEN;
4310 adapter->from_passive_init = false;
f6ef6408
JA		 4311 return -1;
4312 }
4313
c26eba03 4314 if (adapter->resetting && !adapter->wait_for_reset)
57a49436
NF		 4315 rc = reset_sub_crq_queues(adapter);
4316 else
4317 rc = init_sub_crqs(adapter);
1bb3c739
NF		 4318 if (rc) {
4319 dev_err(dev, "Initialization of sub crqs failed\n");
4320 release_crq_queue(adapter);
5df969c3
TF		 4321 return rc;
4322 }
4323
4324 rc = init_sub_crq_irqs(adapter);
4325 if (rc) {
4326 dev_err(dev, "Failed to initialize sub crq irqs\n");
4327 release_crq_queue(adapter);
1bb3c739
NF		 4328 }
4329
4330 return rc;
f6ef6408
JA		 4331}
4332
40c9db8a
TF		 4333static struct device_attribute dev_attr_failover;
4334
f6ef6408
JA		 4335static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4336{
032c5e82
TF		 4337 struct ibmvnic_adapter *adapter;
4338 struct net_device *netdev;
4339 unsigned char *mac_addr_p;
032c5e82
TF		 4340 int rc;
4341
4342 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4343 dev->unit_address);
4344
4345 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4346 VETH_MAC_ADDR, NULL);
4347 if (!mac_addr_p) {
4348 dev_err(&dev->dev,
4349 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4350 __FILE__, __LINE__);
4351 return 0;
4352 }
4353
4354 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
d45cc3a4 4355 IBMVNIC_MAX_QUEUES);
032c5e82
TF		 4356 if (!netdev)
4357 return -ENOMEM;
4358
4359 adapter = netdev_priv(netdev);
90c8014c 4360 adapter->state = VNIC_PROBING;
032c5e82
TF		 4361 dev_set_drvdata(&dev->dev, netdev);
4362 adapter->vdev = dev;
4363 adapter->netdev = netdev;
4364
4365 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4366 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4367 netdev->irq = dev->irq;
4368 netdev->netdev_ops = &ibmvnic_netdev_ops;
4369 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4370 SET_NETDEV_DEV(netdev, &dev->dev);
4371
4372 spin_lock_init(&adapter->stats_lock);
4373
032c5e82 4374 INIT_LIST_HEAD(&adapter->errors);
032c5e82 4375 spin_lock_init(&adapter->error_list_lock);
032c5e82 4376
ed651a10
NF		 4377 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4378 INIT_LIST_HEAD(&adapter->rwi_list);
4379 mutex_init(&adapter->reset_lock);
4380 mutex_init(&adapter->rwi_lock);
4381 adapter->resetting = false;
4382
c26eba03
JA		 4383 adapter->mac_change_pending = false;
4384
6a2fb0e9
NF		 4385 do {
4386 rc = ibmvnic_init(adapter);
7c1885ae
NF		 4387 if (rc && rc != EAGAIN)
4388 goto ibmvnic_init_fail;
6a2fb0e9 4389 } while (rc == EAGAIN);
032c5e82 4390
f39f0d1e 4391 netdev->mtu = adapter->req_mtu - ETH_HLEN;
c26eba03
JA		 4392 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4393 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82 4394
40c9db8a 4395 rc = device_create_file(&dev->dev, &dev_attr_failover);
7c1885ae
NF		 4396 if (rc)
4397 goto ibmvnic_init_fail;
40c9db8a 4398
e876a8a7 4399 netif_carrier_off(netdev);
032c5e82
TF		 4400 rc = register_netdev(netdev);
4401 if (rc) {
4402 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
7c1885ae 4403 goto ibmvnic_register_fail;
032c5e82
TF		 4404 }
4405 dev_info(&dev->dev, "ibmvnic registered\n");
4406
90c8014c 4407 adapter->state = VNIC_PROBED;
c26eba03
JA		 4408
4409 adapter->wait_for_reset = false;
4410
032c5e82 4411 return 0;
7c1885ae
NF		 4412
4413ibmvnic_register_fail:
4414 device_remove_file(&dev->dev, &dev_attr_failover);
4415
4416ibmvnic_init_fail:
4417 release_sub_crqs(adapter);
4418 release_crq_queue(adapter);
4419 free_netdev(netdev);
4420
4421 return rc;
032c5e82
TF		 4422}
4423
4424static int ibmvnic_remove(struct vio_dev *dev)
4425{
4426 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 4427 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4428
90c8014c 4429 adapter->state = VNIC_REMOVING;
032c5e82 4430 unregister_netdev(netdev);
ed651a10 4431 mutex_lock(&adapter->reset_lock);
37489055
NF		 4432
4433 release_resources(adapter);
4434 release_sub_crqs(adapter);
4435 release_crq_queue(adapter);
4436
90c8014c
NF		 4437 adapter->state = VNIC_REMOVED;
4438
ed651a10 4439 mutex_unlock(&adapter->reset_lock);
40c9db8a 4440 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 4441 free_netdev(netdev);
4442 dev_set_drvdata(&dev->dev, NULL);
4443
4444 return 0;
4445}
4446
40c9db8a
TF		 4447static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4448 const char *buf, size_t count)
4449{
4450 struct net_device *netdev = dev_get_drvdata(dev);
4451 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4452 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4453 __be64 session_token;
4454 long rc;
4455
4456 if (!sysfs_streq(buf, "1"))
4457 return -EINVAL;
4458
4459 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4460 H_GET_SESSION_TOKEN, 0, 0, 0);
4461 if (rc) {
4462 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4463 rc);
4464 return -EINVAL;
4465 }
4466
4467 session_token = (__be64)retbuf[0];
4468 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4469 be64_to_cpu(session_token));
4470 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4471 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4472 if (rc) {
4473 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4474 rc);
4475 return -EINVAL;
4476 }
4477
4478 return count;
4479}
4480
6cbaefb4 4481static DEVICE_ATTR_WO(failover);
40c9db8a 4482
032c5e82
TF		 4483static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4484{
4485 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4486 struct ibmvnic_adapter *adapter;
4487 struct iommu_table *tbl;
4488 unsigned long ret = 0;
4489 int i;
4490
4491 tbl = get_iommu_table_base(&vdev->dev);
4492
4493 /* netdev inits at probe time along with the structures we need below*/
4494 if (!netdev)
4495 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4496
4497 adapter = netdev_priv(netdev);
4498
4499 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 4500 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4501
4502 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4503 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4504
4505 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4506 i++)
4507 ret += adapter->rx_pool[i].size *
4508 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4509
4510 return ret;
4511}
4512
4513static int ibmvnic_resume(struct device *dev)
4514{
4515 struct net_device *netdev = dev_get_drvdata(dev);
4516 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4517
cb89ba24
JA		 4518 if (adapter->state != VNIC_OPEN)
4519 return 0;
4520
a248878d 4521 tasklet_schedule(&adapter->tasklet);
032c5e82
TF		 4522
4523 return 0;
4524}
4525
8c37bc67 4526static const struct vio_device_id ibmvnic_device_table[] = {
032c5e82
TF		 4527 {"network", "IBM,vnic"},
4528 {"", "" }
4529};
4530MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4531
4532static const struct dev_pm_ops ibmvnic_pm_ops = {
4533 .resume = ibmvnic_resume
4534};
4535
4536static struct vio_driver ibmvnic_driver = {
4537 .id_table = ibmvnic_device_table,
4538 .probe = ibmvnic_probe,
4539 .remove = ibmvnic_remove,
4540 .get_desired_dma = ibmvnic_get_desired_dma,
4541 .name = ibmvnic_driver_name,
4542 .pm = &ibmvnic_pm_ops,
4543};
4544
4545/* module functions */
4546static int __init ibmvnic_module_init(void)
4547{
4548 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4549 IBMVNIC_DRIVER_VERSION);
4550
4551 return vio_register_driver(&ibmvnic_driver);
4552}
4553
4554static void __exit ibmvnic_module_exit(void)
4555{
4556 vio_unregister_driver(&ibmvnic_driver);
4557}
4558
4559module_init(ibmvnic_module_init);
4560module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)