]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/net/ethernet/ibm/ibmvnic.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ibmvnic: Deactivate RX pool buffer replenishment on H_CLOSED
[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
62#include <linux/in.h>
63#include <linux/ip.h>
ad7775dc 64#include <linux/ipv6.h>
032c5e82
TF		 65#include <linux/irq.h>
66#include <linux/kthread.h>
67#include <linux/seq_file.h>
032c5e82
TF		 68#include <linux/interrupt.h>
69#include <net/net_namespace.h>
70#include <asm/hvcall.h>
71#include <linux/atomic.h>
72#include <asm/vio.h>
73#include <asm/iommu.h>
74#include <linux/uaccess.h>
75#include <asm/firmware.h>
65dc6891 76#include <linux/workqueue.h>
6052d5e2 77#include <linux/if_vlan.h>
032c5e82
TF		 78
79#include "ibmvnic.h"
80
81static const char ibmvnic_driver_name[] = "ibmvnic";
82static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
84MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
85MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90static int ibmvnic_remove(struct vio_dev *);
91static void release_sub_crqs(struct ibmvnic_adapter *);
92static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
ad7775dc 98static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 99static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static int ibmvnic_poll(struct napi_struct *napi, int data);
109static void send_map_query(struct ibmvnic_adapter *adapter);
110static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 112static void send_login(struct ibmvnic_adapter *adapter);
113static void send_cap_queries(struct ibmvnic_adapter *adapter);
114static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 115static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 116static void release_crq_queue(struct ibmvnic_adapter *);
032c5e82
TF		 117
118struct ibmvnic_stat {
119 char name[ETH_GSTRING_LEN];
120 int offset;
121};
122
123#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
124 offsetof(struct ibmvnic_statistics, stat))
125#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
126
127static const struct ibmvnic_stat ibmvnic_stats[] = {
128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
150};
151
152static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
153 unsigned long length, unsigned long *number,
154 unsigned long *irq)
155{
156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
157 long rc;
158
159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
160 *number = retbuf[0];
161 *irq = retbuf[1];
162
163 return rc;
164}
165
032c5e82
TF		 166static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
167 struct ibmvnic_long_term_buff *ltb, int size)
168{
169 struct device *dev = &adapter->vdev->dev;
170
171 ltb->size = size;
172 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
173 GFP_KERNEL);
174
175 if (!ltb->buff) {
176 dev_err(dev, "Couldn't alloc long term buffer\n");
177 return -ENOMEM;
178 }
179 ltb->map_id = adapter->map_id;
180 adapter->map_id++;
db5d0b59
NF		 181
182 init_completion(&adapter->fw_done);
032c5e82
TF		 183 send_request_map(adapter, ltb->addr,
184 ltb->size, ltb->map_id);
032c5e82
TF		 185 wait_for_completion(&adapter->fw_done);
186 return 0;
187}
188
189static void free_long_term_buff(struct ibmvnic_adapter *adapter,
190 struct ibmvnic_long_term_buff *ltb)
191{
192 struct device *dev = &adapter->vdev->dev;
193
c657e32c
NF		 194 if (!ltb->buff)
195 return;
196
ed651a10
NF		 197 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
198 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 199 send_request_unmap(adapter, ltb->map_id);
59af56c2 200 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 201}
202
f185a49a
TF		 203static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
204{
205 int i;
206
207 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
208 i++)
209 adapter->rx_pool[i].active = 0;
210}
211
032c5e82
TF		 212static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
213 struct ibmvnic_rx_pool *pool)
214{
215 int count = pool->size - atomic_read(&pool->available);
216 struct device *dev = &adapter->vdev->dev;
217 int buffers_added = 0;
218 unsigned long lpar_rc;
219 union sub_crq sub_crq;
220 struct sk_buff *skb;
221 unsigned int offset;
222 dma_addr_t dma_addr;
223 unsigned char *dst;
224 u64 *handle_array;
225 int shift = 0;
226 int index;
227 int i;
228
f185a49a
TF		 229 if (!pool->active)
230 return;
231
032c5e82
TF		 232 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
233 be32_to_cpu(adapter->login_rsp_buf->
234 off_rxadd_subcrqs));
235
236 for (i = 0; i < count; ++i) {
237 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
238 if (!skb) {
239 dev_err(dev, "Couldn't replenish rx buff\n");
240 adapter->replenish_no_mem++;
241 break;
242 }
243
244 index = pool->free_map[pool->next_free];
245
246 if (pool->rx_buff[index].skb)
247 dev_err(dev, "Inconsistent free_map!\n");
248
249 /* Copy the skb to the long term mapped DMA buffer */
250 offset = index * pool->buff_size;
251 dst = pool->long_term_buff.buff + offset;
252 memset(dst, 0, pool->buff_size);
253 dma_addr = pool->long_term_buff.addr + offset;
254 pool->rx_buff[index].data = dst;
255
256 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
257 pool->rx_buff[index].dma = dma_addr;
258 pool->rx_buff[index].skb = skb;
259 pool->rx_buff[index].pool_index = pool->index;
260 pool->rx_buff[index].size = pool->buff_size;
261
262 memset(&sub_crq, 0, sizeof(sub_crq));
263 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
264 sub_crq.rx_add.correlator =
265 cpu_to_be64((u64)&pool->rx_buff[index]);
266 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
267 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
268
269 /* The length field of the sCRQ is defined to be 24 bits so the
270 * buffer size needs to be left shifted by a byte before it is
271 * converted to big endian to prevent the last byte from being
272 * truncated.
273 */
274#ifdef __LITTLE_ENDIAN__
275 shift = 8;
276#endif
277 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
278
279 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
280 &sub_crq);
281 if (lpar_rc != H_SUCCESS)
282 goto failure;
283
284 buffers_added++;
285 adapter->replenish_add_buff_success++;
286 pool->next_free = (pool->next_free + 1) % pool->size;
287 }
288 atomic_add(buffers_added, &pool->available);
289 return;
290
291failure:
292 dev_info(dev, "replenish pools failure\n");
293 pool->free_map[pool->next_free] = index;
294 pool->rx_buff[index].skb = NULL;
295 if (!dma_mapping_error(dev, dma_addr))
296 dma_unmap_single(dev, dma_addr, pool->buff_size,
297 DMA_FROM_DEVICE);
298
299 dev_kfree_skb_any(skb);
300 adapter->replenish_add_buff_failure++;
301 atomic_add(buffers_added, &pool->available);
f185a49a
TF		 302
303 if (lpar_rc == H_CLOSED) {
304 /* Disable buffer pool replenishment and report carrier off if
305 * queue is closed. Firmware guarantees that a signal will
306 * be sent to the driver, triggering a reset.
307 */
308 deactivate_rx_pools(adapter);
309 netif_carrier_off(adapter->netdev);
310 }
032c5e82
TF		 311}
312
313static void replenish_pools(struct ibmvnic_adapter *adapter)
314{
315 int i;
316
032c5e82
TF		 317 adapter->replenish_task_cycles++;
318 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
319 i++) {
320 if (adapter->rx_pool[i].active)
321 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
322 }
323}
324
7bbc27a4
NF		 325static void release_stats_token(struct ibmvnic_adapter *adapter)
326{
327 struct device *dev = &adapter->vdev->dev;
328
329 if (!adapter->stats_token)
330 return;
331
332 dma_unmap_single(dev, adapter->stats_token,
333 sizeof(struct ibmvnic_statistics),
334 DMA_FROM_DEVICE);
335 adapter->stats_token = 0;
336}
337
338static int init_stats_token(struct ibmvnic_adapter *adapter)
339{
340 struct device *dev = &adapter->vdev->dev;
341 dma_addr_t stok;
342
343 stok = dma_map_single(dev, &adapter->stats,
344 sizeof(struct ibmvnic_statistics),
345 DMA_FROM_DEVICE);
346 if (dma_mapping_error(dev, stok)) {
347 dev_err(dev, "Couldn't map stats buffer\n");
348 return -1;
349 }
350
351 adapter->stats_token = stok;
352 return 0;
353}
354
0ffe2cb7 355static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 356{
0ffe2cb7
NF		 357 struct ibmvnic_rx_pool *rx_pool;
358 int rx_scrqs;
359 int i, j;
032c5e82 360
0ffe2cb7 361 if (!adapter->rx_pool)
032c5e82
TF		 362 return;
363
0ffe2cb7
NF		 364 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
365 for (i = 0; i < rx_scrqs; i++) {
366 rx_pool = &adapter->rx_pool[i];
367
368 kfree(rx_pool->free_map);
369 free_long_term_buff(adapter, &rx_pool->long_term_buff);
370
371 if (!rx_pool->rx_buff)
e0ebe942 372 continue;
0ffe2cb7
NF		 373
374 for (j = 0; j < rx_pool->size; j++) {
375 if (rx_pool->rx_buff[j].skb) {
376 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
377 rx_pool->rx_buff[i].skb = NULL;
378 }
379 }
380
381 kfree(rx_pool->rx_buff);
382 }
383
384 kfree(adapter->rx_pool);
385 adapter->rx_pool = NULL;
386}
387
388static int init_rx_pools(struct net_device *netdev)
389{
390 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
391 struct device *dev = &adapter->vdev->dev;
392 struct ibmvnic_rx_pool *rx_pool;
393 int rxadd_subcrqs;
394 u64 *size_array;
395 int i, j;
396
397 rxadd_subcrqs =
398 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
399 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
400 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
401
402 adapter->rx_pool = kcalloc(rxadd_subcrqs,
403 sizeof(struct ibmvnic_rx_pool),
404 GFP_KERNEL);
405 if (!adapter->rx_pool) {
406 dev_err(dev, "Failed to allocate rx pools\n");
407 return -1;
408 }
409
410 for (i = 0; i < rxadd_subcrqs; i++) {
411 rx_pool = &adapter->rx_pool[i];
412
413 netdev_dbg(adapter->netdev,
414 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
415 i, adapter->req_rx_add_entries_per_subcrq,
416 be64_to_cpu(size_array[i]));
417
418 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
419 rx_pool->index = i;
420 rx_pool->buff_size = be64_to_cpu(size_array[i]);
421 rx_pool->active = 1;
422
423 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
424 GFP_KERNEL);
425 if (!rx_pool->free_map) {
426 release_rx_pools(adapter);
427 return -1;
032c5e82 428 }
0ffe2cb7
NF		 429
430 rx_pool->rx_buff = kcalloc(rx_pool->size,
431 sizeof(struct ibmvnic_rx_buff),
432 GFP_KERNEL);
433 if (!rx_pool->rx_buff) {
434 dev_err(dev, "Couldn't alloc rx buffers\n");
435 release_rx_pools(adapter);
436 return -1;
437 }
438
439 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
440 rx_pool->size * rx_pool->buff_size)) {
441 release_rx_pools(adapter);
442 return -1;
443 }
444
445 for (j = 0; j < rx_pool->size; ++j)
446 rx_pool->free_map[j] = j;
447
448 atomic_set(&rx_pool->available, 0);
449 rx_pool->next_alloc = 0;
450 rx_pool->next_free = 0;
032c5e82 451 }
0ffe2cb7
NF		 452
453 return 0;
032c5e82
TF		 454}
455
c657e32c
NF		 456static void release_tx_pools(struct ibmvnic_adapter *adapter)
457{
458 struct ibmvnic_tx_pool *tx_pool;
459 int i, tx_scrqs;
460
461 if (!adapter->tx_pool)
462 return;
463
464 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
465 for (i = 0; i < tx_scrqs; i++) {
466 tx_pool = &adapter->tx_pool[i];
467 kfree(tx_pool->tx_buff);
468 free_long_term_buff(adapter, &tx_pool->long_term_buff);
469 kfree(tx_pool->free_map);
470 }
471
472 kfree(adapter->tx_pool);
473 adapter->tx_pool = NULL;
474}
475
476static int init_tx_pools(struct net_device *netdev)
477{
478 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
479 struct device *dev = &adapter->vdev->dev;
480 struct ibmvnic_tx_pool *tx_pool;
481 int tx_subcrqs;
482 int i, j;
483
484 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
485 adapter->tx_pool = kcalloc(tx_subcrqs,
486 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
487 if (!adapter->tx_pool)
488 return -1;
489
490 for (i = 0; i < tx_subcrqs; i++) {
491 tx_pool = &adapter->tx_pool[i];
492 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
493 sizeof(struct ibmvnic_tx_buff),
494 GFP_KERNEL);
495 if (!tx_pool->tx_buff) {
496 dev_err(dev, "tx pool buffer allocation failed\n");
497 release_tx_pools(adapter);
498 return -1;
499 }
500
501 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
502 adapter->req_tx_entries_per_subcrq *
503 adapter->req_mtu)) {
504 release_tx_pools(adapter);
505 return -1;
506 }
507
508 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
509 sizeof(int), GFP_KERNEL);
510 if (!tx_pool->free_map) {
511 release_tx_pools(adapter);
512 return -1;
513 }
514
515 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
516 tx_pool->free_map[j] = j;
517
518 tx_pool->consumer_index = 0;
519 tx_pool->producer_index = 0;
520 }
521
522 return 0;
523}
524
661a2622
NF		 525static void release_error_buffers(struct ibmvnic_adapter *adapter)
526{
527 struct device *dev = &adapter->vdev->dev;
528 struct ibmvnic_error_buff *error_buff, *tmp;
529 unsigned long flags;
530
531 spin_lock_irqsave(&adapter->error_list_lock, flags);
532 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
533 list_del(&error_buff->list);
534 dma_unmap_single(dev, error_buff->dma, error_buff->len,
535 DMA_FROM_DEVICE);
536 kfree(error_buff->buff);
537 kfree(error_buff);
538 }
539 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
540}
541
d944c3d6
JA		 542static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
543{
544 int i;
545
546 if (adapter->napi_enabled)
547 return;
548
549 for (i = 0; i < adapter->req_rx_queues; i++)
550 napi_enable(&adapter->napi[i]);
551
552 adapter->napi_enabled = true;
553}
554
555static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
556{
557 int i;
558
559 if (!adapter->napi_enabled)
560 return;
561
562 for (i = 0; i < adapter->req_rx_queues; i++)
563 napi_disable(&adapter->napi[i]);
564
565 adapter->napi_enabled = false;
566}
567
a57a5d25 568static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 569{
570 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 571 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 572 struct device *dev = &adapter->vdev->dev;
032c5e82 573
bd0b6723
JA		 574 do {
575 if (adapter->renegotiate) {
576 adapter->renegotiate = false;
b510888f 577 release_sub_crqs(adapter);
bd0b6723
JA		 578
579 reinit_completion(&adapter->init_done);
580 send_cap_queries(adapter);
581 if (!wait_for_completion_timeout(&adapter->init_done,
582 timeout)) {
583 dev_err(dev, "Capabilities query timeout\n");
584 return -1;
585 }
586 }
587
588 reinit_completion(&adapter->init_done);
589 send_login(adapter);
590 if (!wait_for_completion_timeout(&adapter->init_done,
591 timeout)) {
592 dev_err(dev, "Login timeout\n");
593 return -1;
594 }
595 } while (adapter->renegotiate);
596
a57a5d25
JA		 597 return 0;
598}
599
1b8955ee
NF		 600static void release_resources(struct ibmvnic_adapter *adapter)
601{
c7bac00b
NF		 602 int i;
603
1b8955ee
NF		 604 release_tx_pools(adapter);
605 release_rx_pools(adapter);
606
1b8955ee 607 release_stats_token(adapter);
661a2622 608 release_error_buffers(adapter);
c7bac00b
NF		 609
610 if (adapter->napi) {
611 for (i = 0; i < adapter->req_rx_queues; i++) {
612 if (&adapter->napi[i])
613 netif_napi_del(&adapter->napi[i]);
614 }
615 }
1b8955ee
NF		 616}
617
53da09e9
NF		 618static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
619{
620 struct net_device *netdev = adapter->netdev;
621 unsigned long timeout = msecs_to_jiffies(30000);
622 union ibmvnic_crq crq;
623 bool resend;
624 int rc;
625
53da09e9
NF		 626 netdev_err(netdev, "setting link state %d\n", link_state);
627 memset(&crq, 0, sizeof(crq));
628 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
629 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
630 crq.logical_link_state.link_state = link_state;
631
632 do {
633 resend = false;
634
635 reinit_completion(&adapter->init_done);
636 rc = ibmvnic_send_crq(adapter, &crq);
637 if (rc) {
638 netdev_err(netdev, "Failed to set link state\n");
639 return rc;
640 }
641
642 if (!wait_for_completion_timeout(&adapter->init_done,
643 timeout)) {
644 netdev_err(netdev, "timeout setting link state\n");
645 return -1;
646 }
647
648 if (adapter->init_done_rc == 1) {
649 /* Partuial success, delay and re-send */
650 mdelay(1000);
651 resend = true;
652 }
653 } while (resend);
654
655 return 0;
656}
657
7f3c6e6b
TF		 658static int set_real_num_queues(struct net_device *netdev)
659{
660 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
661 int rc;
662
663 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
664 if (rc) {
665 netdev_err(netdev, "failed to set the number of tx queues\n");
666 return rc;
667 }
668
669 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
670 if (rc)
671 netdev_err(netdev, "failed to set the number of rx queues\n");
672
673 return rc;
674}
675
bfc32f29 676static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 677{
bfc32f29
NF		 678 struct net_device *netdev = adapter->netdev;
679 int i, rc;
a57a5d25 680
7f3c6e6b
TF		 681 rc = set_real_num_queues(netdev);
682 if (rc)
683 return rc;
bd0b6723
JA		 684
685 rc = init_sub_crq_irqs(adapter);
686 if (rc) {
bfc32f29 687 netdev_err(netdev, "failed to initialize sub crq irqs\n");
bd0b6723
JA		 688 return -1;
689 }
690
5d5e84eb
NF		 691 rc = init_stats_token(adapter);
692 if (rc)
693 return rc;
694
032c5e82
TF		 695 adapter->map_id = 1;
696 adapter->napi = kcalloc(adapter->req_rx_queues,
697 sizeof(struct napi_struct), GFP_KERNEL);
698 if (!adapter->napi)
bfc32f29
NF		 699 return -ENOMEM;
700
032c5e82
TF		 701 for (i = 0; i < adapter->req_rx_queues; i++) {
702 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
703 NAPI_POLL_WEIGHT);
032c5e82 704 }
032c5e82 705
032c5e82 706 send_map_query(adapter);
0ffe2cb7
NF		 707
708 rc = init_rx_pools(netdev);
709 if (rc)
bfc32f29 710 return rc;
032c5e82 711
c657e32c 712 rc = init_tx_pools(netdev);
bfc32f29
NF		 713 return rc;
714}
715
ed651a10 716static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 717{
718 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 719 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 720 int i, rc;
721
90c8014c 722 adapter->state = VNIC_OPENING;
032c5e82 723 replenish_pools(adapter);
d944c3d6 724 ibmvnic_napi_enable(adapter);
bfc32f29 725
032c5e82
TF		 726 /* We're ready to receive frames, enable the sub-crq interrupts and
727 * set the logical link state to up
728 */
ed651a10
NF		 729 for (i = 0; i < adapter->req_rx_queues; i++) {
730 if (prev_state == VNIC_CLOSED)
731 enable_irq(adapter->rx_scrq[i]->irq);
732 else
733 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
734 }
032c5e82 735
ed651a10
NF		 736 for (i = 0; i < adapter->req_tx_queues; i++) {
737 if (prev_state == VNIC_CLOSED)
738 enable_irq(adapter->tx_scrq[i]->irq);
739 else
740 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
741 }
032c5e82 742
53da09e9 743 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 744 if (rc) {
745 for (i = 0; i < adapter->req_rx_queues; i++)
746 napi_disable(&adapter->napi[i]);
747 release_resources(adapter);
ed651a10 748 return rc;
bfc32f29 749 }
032c5e82 750
ed651a10
NF		 751 netif_tx_start_all_queues(netdev);
752
753 if (prev_state == VNIC_CLOSED) {
754 for (i = 0; i < adapter->req_rx_queues; i++)
755 napi_schedule(&adapter->napi[i]);
756 }
757
758 adapter->state = VNIC_OPEN;
759 return rc;
760}
761
762static int ibmvnic_open(struct net_device *netdev)
763{
764 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
765 int rc;
766
767 mutex_lock(&adapter->reset_lock);
768
769 if (adapter->state != VNIC_CLOSED) {
770 rc = ibmvnic_login(netdev);
771 if (rc) {
772 mutex_unlock(&adapter->reset_lock);
773 return rc;
774 }
775
776 rc = init_resources(adapter);
777 if (rc) {
778 netdev_err(netdev, "failed to initialize resources\n");
779 release_resources(adapter);
780 mutex_unlock(&adapter->reset_lock);
781 return rc;
782 }
783 }
784
785 rc = __ibmvnic_open(netdev);
786 mutex_unlock(&adapter->reset_lock);
787
bfc32f29 788 return rc;
032c5e82
TF		 789}
790
b41b83e9
NF		 791static void clean_tx_pools(struct ibmvnic_adapter *adapter)
792{
793 struct ibmvnic_tx_pool *tx_pool;
794 u64 tx_entries;
795 int tx_scrqs;
796 int i, j;
797
798 if (!adapter->tx_pool)
799 return;
800
801 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
802 tx_entries = adapter->req_tx_entries_per_subcrq;
803
804 /* Free any remaining skbs in the tx buffer pools */
805 for (i = 0; i < tx_scrqs; i++) {
806 tx_pool = &adapter->tx_pool[i];
807 if (!tx_pool)
808 continue;
809
810 for (j = 0; j < tx_entries; j++) {
811 if (tx_pool->tx_buff[j].skb) {
812 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
813 tx_pool->tx_buff[j].skb = NULL;
814 }
815 }
816 }
817}
818
ed651a10 819static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 820{
821 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 822 int rc = 0;
ea5509f5
JA		 823 int i;
824
90c8014c 825 adapter->state = VNIC_CLOSING;
ed651a10 826 netif_tx_stop_all_queues(netdev);
d944c3d6 827 ibmvnic_napi_disable(adapter);
46293b94
NF		 828
829 if (adapter->tx_scrq) {
830 for (i = 0; i < adapter->req_tx_queues; i++)
831 if (adapter->tx_scrq[i]->irq)
832 disable_irq(adapter->tx_scrq[i]->irq);
833 }
834
53da09e9 835 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 836 if (rc)
837 return rc;
838
839 if (adapter->rx_scrq) {
840 for (i = 0; i < adapter->req_rx_queues; i++) {
841 int retries = 10;
842
843 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
844 retries--;
845 mdelay(100);
846
847 if (retries == 0)
848 break;
849 }
850
851 if (adapter->rx_scrq[i]->irq)
852 disable_irq(adapter->rx_scrq[i]->irq);
853 }
854 }
ea5509f5 855
10f76215 856 clean_tx_pools(adapter);
90c8014c 857 adapter->state = VNIC_CLOSED;
53da09e9 858 return rc;
032c5e82
TF		 859}
860
ed651a10
NF		 861static int ibmvnic_close(struct net_device *netdev)
862{
863 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
864 int rc;
865
866 mutex_lock(&adapter->reset_lock);
867 rc = __ibmvnic_close(netdev);
868 mutex_unlock(&adapter->reset_lock);
869
870 return rc;
871}
872
ad7775dc
TF		 873/**
874 * build_hdr_data - creates L2/L3/L4 header data buffer
875 * @hdr_field - bitfield determining needed headers
876 * @skb - socket buffer
877 * @hdr_len - array of header lengths
878 * @tot_len - total length of data
879 *
880 * Reads hdr_field to determine which headers are needed by firmware.
881 * Builds a buffer containing these headers. Saves individual header
882 * lengths and total buffer length to be used to build descriptors.
883 */
884static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
885 int *hdr_len, u8 *hdr_data)
886{
887 int len = 0;
888 u8 *hdr;
889
890 hdr_len[0] = sizeof(struct ethhdr);
891
892 if (skb->protocol == htons(ETH_P_IP)) {
893 hdr_len[1] = ip_hdr(skb)->ihl * 4;
894 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
895 hdr_len[2] = tcp_hdrlen(skb);
896 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
897 hdr_len[2] = sizeof(struct udphdr);
898 } else if (skb->protocol == htons(ETH_P_IPV6)) {
899 hdr_len[1] = sizeof(struct ipv6hdr);
900 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
901 hdr_len[2] = tcp_hdrlen(skb);
902 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
903 hdr_len[2] = sizeof(struct udphdr);
904 }
905
906 memset(hdr_data, 0, 120);
907 if ((hdr_field >> 6) & 1) {
908 hdr = skb_mac_header(skb);
909 memcpy(hdr_data, hdr, hdr_len[0]);
910 len += hdr_len[0];
911 }
912
913 if ((hdr_field >> 5) & 1) {
914 hdr = skb_network_header(skb);
915 memcpy(hdr_data + len, hdr, hdr_len[1]);
916 len += hdr_len[1];
917 }
918
919 if ((hdr_field >> 4) & 1) {
920 hdr = skb_transport_header(skb);
921 memcpy(hdr_data + len, hdr, hdr_len[2]);
922 len += hdr_len[2];
923 }
924 return len;
925}
926
927/**
928 * create_hdr_descs - create header and header extension descriptors
929 * @hdr_field - bitfield determining needed headers
930 * @data - buffer containing header data
931 * @len - length of data buffer
932 * @hdr_len - array of individual header lengths
933 * @scrq_arr - descriptor array
934 *
935 * Creates header and, if needed, header extension descriptors and
936 * places them in a descriptor array, scrq_arr
937 */
938
939static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
940 union sub_crq *scrq_arr)
941{
942 union sub_crq hdr_desc;
943 int tmp_len = len;
944 u8 *data, *cur;
945 int tmp;
946
947 while (tmp_len > 0) {
948 cur = hdr_data + len - tmp_len;
949
950 memset(&hdr_desc, 0, sizeof(hdr_desc));
951 if (cur != hdr_data) {
952 data = hdr_desc.hdr_ext.data;
953 tmp = tmp_len > 29 ? 29 : tmp_len;
954 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
955 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
956 hdr_desc.hdr_ext.len = tmp;
957 } else {
958 data = hdr_desc.hdr.data;
959 tmp = tmp_len > 24 ? 24 : tmp_len;
960 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
961 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
962 hdr_desc.hdr.len = tmp;
963 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
964 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
965 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
966 hdr_desc.hdr.flag = hdr_field << 1;
967 }
968 memcpy(data, cur, tmp);
969 tmp_len -= tmp;
970 *scrq_arr = hdr_desc;
971 scrq_arr++;
972 }
973}
974
975/**
976 * build_hdr_descs_arr - build a header descriptor array
977 * @skb - socket buffer
978 * @num_entries - number of descriptors to be sent
979 * @subcrq - first TX descriptor
980 * @hdr_field - bit field determining which headers will be sent
981 *
982 * This function will build a TX descriptor array with applicable
983 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
984 */
985
986static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
987 int *num_entries, u8 hdr_field)
988{
989 int hdr_len[3] = {0, 0, 0};
990 int tot_len, len;
991 u8 *hdr_data = txbuff->hdr_data;
992
993 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
994 txbuff->hdr_data);
995 len = tot_len;
996 len -= 24;
997 if (len > 0)
998 num_entries += len % 29 ? len / 29 + 1 : len / 29;
999 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1000 txbuff->indir_arr + 1);
1001}
1002
032c5e82
TF		 1003static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1004{
1005 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1006 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1007 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1008 struct device *dev = &adapter->vdev->dev;
1009 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1010 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1011 struct ibmvnic_tx_pool *tx_pool;
1012 unsigned int tx_send_failed = 0;
1013 unsigned int tx_map_failed = 0;
1014 unsigned int tx_dropped = 0;
1015 unsigned int tx_packets = 0;
1016 unsigned int tx_bytes = 0;
1017 dma_addr_t data_dma_addr;
1018 struct netdev_queue *txq;
032c5e82
TF		 1019 unsigned long lpar_rc;
1020 union sub_crq tx_crq;
1021 unsigned int offset;
ad7775dc 1022 int num_entries = 1;
032c5e82
TF		 1023 unsigned char *dst;
1024 u64 *handle_array;
1025 int index = 0;
1026 int ret = 0;
1027
ed651a10 1028 if (adapter->resetting) {
7f5b0308
TF		 1029 if (!netif_subqueue_stopped(netdev, skb))
1030 netif_stop_subqueue(netdev, queue_num);
1031 dev_kfree_skb_any(skb);
1032
032c5e82
TF		 1033 tx_send_failed++;
1034 tx_dropped++;
7f5b0308 1035 ret = NETDEV_TX_OK;
032c5e82
TF		 1036 goto out;
1037 }
1038
161b8a81
NF		 1039 tx_pool = &adapter->tx_pool[queue_num];
1040 tx_scrq = adapter->tx_scrq[queue_num];
1041 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1042 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1043 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1044
032c5e82
TF		 1045 index = tx_pool->free_map[tx_pool->consumer_index];
1046 offset = index * adapter->req_mtu;
1047 dst = tx_pool->long_term_buff.buff + offset;
1048 memset(dst, 0, adapter->req_mtu);
1049 skb_copy_from_linear_data(skb, dst, skb->len);
1050 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1051
1052 tx_pool->consumer_index =
1053 (tx_pool->consumer_index + 1) %
068d9f90 1054 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1055
1056 tx_buff = &tx_pool->tx_buff[index];
1057 tx_buff->skb = skb;
1058 tx_buff->data_dma[0] = data_dma_addr;
1059 tx_buff->data_len[0] = skb->len;
1060 tx_buff->index = index;
1061 tx_buff->pool_index = queue_num;
1062 tx_buff->last_frag = true;
032c5e82
TF		 1063
1064 memset(&tx_crq, 0, sizeof(tx_crq));
1065 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1066 tx_crq.v1.type = IBMVNIC_TX_DESC;
1067 tx_crq.v1.n_crq_elem = 1;
1068 tx_crq.v1.n_sge = 1;
1069 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1070 tx_crq.v1.correlator = cpu_to_be32(index);
1071 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1072 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1073 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1074
1075 if (adapter->vlan_header_insertion) {
1076 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1077 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1078 }
1079
1080 if (skb->protocol == htons(ETH_P_IP)) {
1081 if (ip_hdr(skb)->version == 4)
1082 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1083 else if (ip_hdr(skb)->version == 6)
1084 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1085
1086 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1087 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1088 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1089 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1090 }
1091
ad7775dc 1092 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1093 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1094 hdrs += 2;
1095 }
1096 /* determine if l2/3/4 headers are sent to firmware */
1097 if ((*hdrs >> 7) & 1 &&
1098 (skb->protocol == htons(ETH_P_IP) ||
1099 skb->protocol == htons(ETH_P_IPV6))) {
1100 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1101 tx_crq.v1.n_crq_elem = num_entries;
1102 tx_buff->indir_arr[0] = tx_crq;
1103 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1104 sizeof(tx_buff->indir_arr),
1105 DMA_TO_DEVICE);
1106 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1107 dev_kfree_skb_any(skb);
1108 tx_buff->skb = NULL;
ad7775dc
TF		 1109 if (!firmware_has_feature(FW_FEATURE_CMO))
1110 dev_err(dev, "tx: unable to map descriptor array\n");
1111 tx_map_failed++;
1112 tx_dropped++;
7f5b0308 1113 ret = NETDEV_TX_OK;
ad7775dc
TF		 1114 goto out;
1115 }
498cd8e4 1116 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1117 (u64)tx_buff->indir_dma,
1118 (u64)num_entries);
1119 } else {
498cd8e4
JA		 1120 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1121 &tx_crq);
ad7775dc 1122 }
032c5e82
TF		 1123 if (lpar_rc != H_SUCCESS) {
1124 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1125
1126 if (tx_pool->consumer_index == 0)
1127 tx_pool->consumer_index =
068d9f90 1128 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1129 else
1130 tx_pool->consumer_index--;
1131
7f5b0308
TF		 1132 dev_kfree_skb_any(skb);
1133 tx_buff->skb = NULL;
1134
b8c80b84
TF		 1135 if (lpar_rc == H_CLOSED) {
1136 /* Disable TX and report carrier off if queue is closed.
1137 * Firmware guarantees that a signal will be sent to the
1138 * driver, triggering a reset or some other action.
1139 */
1140 netif_tx_stop_all_queues(netdev);
1141 netif_carrier_off(netdev);
1142 }
7f5b0308 1143
032c5e82
TF		 1144 tx_send_failed++;
1145 tx_dropped++;
7f5b0308 1146 ret = NETDEV_TX_OK;
032c5e82
TF		 1147 goto out;
1148 }
142c0ac4 1149
58c8c0c0
BK		 1150 if (atomic_inc_return(&tx_scrq->used)
1151 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1152 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1153 netif_stop_subqueue(netdev, queue_num);
1154 }
1155
032c5e82
TF		 1156 tx_packets++;
1157 tx_bytes += skb->len;
1158 txq->trans_start = jiffies;
1159 ret = NETDEV_TX_OK;
1160
1161out:
1162 netdev->stats.tx_dropped += tx_dropped;
1163 netdev->stats.tx_bytes += tx_bytes;
1164 netdev->stats.tx_packets += tx_packets;
1165 adapter->tx_send_failed += tx_send_failed;
1166 adapter->tx_map_failed += tx_map_failed;
1167
1168 return ret;
1169}
1170
1171static void ibmvnic_set_multi(struct net_device *netdev)
1172{
1173 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1174 struct netdev_hw_addr *ha;
1175 union ibmvnic_crq crq;
1176
1177 memset(&crq, 0, sizeof(crq));
1178 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1179 crq.request_capability.cmd = REQUEST_CAPABILITY;
1180
1181 if (netdev->flags & IFF_PROMISC) {
1182 if (!adapter->promisc_supported)
1183 return;
1184 } else {
1185 if (netdev->flags & IFF_ALLMULTI) {
1186 /* Accept all multicast */
1187 memset(&crq, 0, sizeof(crq));
1188 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1189 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1190 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1191 ibmvnic_send_crq(adapter, &crq);
1192 } else if (netdev_mc_empty(netdev)) {
1193 /* Reject all multicast */
1194 memset(&crq, 0, sizeof(crq));
1195 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1196 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1197 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1198 ibmvnic_send_crq(adapter, &crq);
1199 } else {
1200 /* Accept one or more multicast(s) */
1201 netdev_for_each_mc_addr(ha, netdev) {
1202 memset(&crq, 0, sizeof(crq));
1203 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1204 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1205 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1206 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1207 ha->addr);
1208 ibmvnic_send_crq(adapter, &crq);
1209 }
1210 }
1211 }
1212}
1213
1214static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1215{
1216 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1217 struct sockaddr *addr = p;
1218 union ibmvnic_crq crq;
1219
1220 if (!is_valid_ether_addr(addr->sa_data))
1221 return -EADDRNOTAVAIL;
1222
1223 memset(&crq, 0, sizeof(crq));
1224 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1225 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1226 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1227 ibmvnic_send_crq(adapter, &crq);
1228 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1229 return 0;
1230}
1231
ed651a10
NF		 1232/**
1233 * do_reset returns zero if we are able to keep processing reset events, or
1234 * non-zero if we hit a fatal error and must halt.
1235 */
1236static int do_reset(struct ibmvnic_adapter *adapter,
1237 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1238{
ed651a10
NF		 1239 struct net_device *netdev = adapter->netdev;
1240 int i, rc;
1241
1242 netif_carrier_off(netdev);
1243 adapter->reset_reason = rwi->reset_reason;
1244
1245 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1246 rc = ibmvnic_reenable_crq_queue(adapter);
1247 if (rc)
1248 return 0;
1249 }
1250
1251 rc = __ibmvnic_close(netdev);
1252 if (rc)
1253 return rc;
1254
8cb31cfc
JA		 1255 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1256 /* remove the closed state so when we call open it appears
1257 * we are coming from the probed state.
1258 */
1259 adapter->state = VNIC_PROBED;
032c5e82 1260
8cb31cfc
JA		 1261 release_resources(adapter);
1262 release_sub_crqs(adapter);
1263 release_crq_queue(adapter);
ed651a10 1264
8cb31cfc
JA		 1265 rc = ibmvnic_init(adapter);
1266 if (rc)
1267 return 0;
ed651a10 1268
8cb31cfc
JA		 1269 /* If the adapter was in PROBE state prior to the reset,
1270 * exit here.
1271 */
1272 if (reset_state == VNIC_PROBED)
1273 return 0;
ed651a10 1274
8cb31cfc
JA		 1275 rc = ibmvnic_login(netdev);
1276 if (rc) {
1277 adapter->state = VNIC_PROBED;
1278 return 0;
1279 }
ed651a10 1280
8cb31cfc
JA		 1281 rtnl_lock();
1282 rc = init_resources(adapter);
1283 rtnl_unlock();
1284 if (rc)
1285 return rc;
ed651a10 1286
8cb31cfc
JA		 1287 if (reset_state == VNIC_CLOSED)
1288 return 0;
1289 }
ed651a10
NF		 1290
1291 rc = __ibmvnic_open(netdev);
1292 if (rc) {
1293 if (list_empty(&adapter->rwi_list))
1294 adapter->state = VNIC_CLOSED;
1295 else
1296 adapter->state = reset_state;
1297
1298 return 0;
1299 }
1300
1301 netif_carrier_on(netdev);
1302
1303 /* kick napi */
1304 for (i = 0; i < adapter->req_rx_queues; i++)
1305 napi_schedule(&adapter->napi[i]);
1306
2ce9e4ef 1307 netdev_notify_peers(netdev);
ed651a10
NF		 1308 return 0;
1309}
1310
1311static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1312{
1313 struct ibmvnic_rwi *rwi;
1314
1315 mutex_lock(&adapter->rwi_lock);
1316
1317 if (!list_empty(&adapter->rwi_list)) {
1318 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1319 list);
1320 list_del(&rwi->list);
1321 } else {
1322 rwi = NULL;
1323 }
1324
1325 mutex_unlock(&adapter->rwi_lock);
1326 return rwi;
1327}
1328
1329static void free_all_rwi(struct ibmvnic_adapter *adapter)
1330{
1331 struct ibmvnic_rwi *rwi;
1332
1333 rwi = get_next_rwi(adapter);
1334 while (rwi) {
1335 kfree(rwi);
1336 rwi = get_next_rwi(adapter);
1337 }
1338}
1339
1340static void __ibmvnic_reset(struct work_struct *work)
1341{
1342 struct ibmvnic_rwi *rwi;
1343 struct ibmvnic_adapter *adapter;
1344 struct net_device *netdev;
1345 u32 reset_state;
1346 int rc;
1347
1348 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1349 netdev = adapter->netdev;
1350
1351 mutex_lock(&adapter->reset_lock);
1352 adapter->resetting = true;
1353 reset_state = adapter->state;
1354
1355 rwi = get_next_rwi(adapter);
1356 while (rwi) {
1357 rc = do_reset(adapter, rwi, reset_state);
1358 kfree(rwi);
1359 if (rc)
1360 break;
1361
1362 rwi = get_next_rwi(adapter);
1363 }
1364
1365 if (rc) {
1366 free_all_rwi(adapter);
6d0af07d 1367 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1368 return;
1369 }
1370
1371 adapter->resetting = false;
1372 mutex_unlock(&adapter->reset_lock);
1373}
1374
1375static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1376 enum ibmvnic_reset_reason reason)
1377{
1378 struct ibmvnic_rwi *rwi, *tmp;
1379 struct net_device *netdev = adapter->netdev;
1380 struct list_head *entry;
1381
1382 if (adapter->state == VNIC_REMOVING ||
1383 adapter->state == VNIC_REMOVED) {
1384 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1385 return;
1386 }
1387
1388 mutex_lock(&adapter->rwi_lock);
1389
1390 list_for_each(entry, &adapter->rwi_list) {
1391 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1392 if (tmp->reset_reason == reason) {
1393 netdev_err(netdev, "Matching reset found, skipping\n");
1394 mutex_unlock(&adapter->rwi_lock);
1395 return;
1396 }
1397 }
1398
1399 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1400 if (!rwi) {
1401 mutex_unlock(&adapter->rwi_lock);
1402 ibmvnic_close(netdev);
1403 return;
1404 }
1405
1406 rwi->reset_reason = reason;
1407 list_add_tail(&rwi->list, &adapter->rwi_list);
1408 mutex_unlock(&adapter->rwi_lock);
1409 schedule_work(&adapter->ibmvnic_reset);
1410}
1411
1412static void ibmvnic_tx_timeout(struct net_device *dev)
1413{
1414 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1415
1416 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1417}
1418
1419static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1420 struct ibmvnic_rx_buff *rx_buff)
1421{
1422 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1423
1424 rx_buff->skb = NULL;
1425
1426 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1427 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1428
1429 atomic_dec(&pool->available);
1430}
1431
1432static int ibmvnic_poll(struct napi_struct *napi, int budget)
1433{
1434 struct net_device *netdev = napi->dev;
1435 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1436 int scrq_num = (int)(napi - adapter->napi);
1437 int frames_processed = 0;
1438restart_poll:
1439 while (frames_processed < budget) {
1440 struct sk_buff *skb;
1441 struct ibmvnic_rx_buff *rx_buff;
1442 union sub_crq *next;
1443 u32 length;
1444 u16 offset;
1445 u8 flags = 0;
1446
1447 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1448 break;
1449 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1450 rx_buff =
1451 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1452 rx_comp.correlator);
1453 /* do error checking */
1454 if (next->rx_comp.rc) {
1455 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1456 /* free the entry */
1457 next->rx_comp.first = 0;
1458 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1459 continue;
032c5e82
TF		 1460 }
1461
1462 length = be32_to_cpu(next->rx_comp.len);
1463 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1464 flags = next->rx_comp.flags;
1465 skb = rx_buff->skb;
1466 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1467 length);
6052d5e2
MFV		 1468
1469 /* VLAN Header has been stripped by the system firmware and
1470 * needs to be inserted by the driver
1471 */
1472 if (adapter->rx_vlan_header_insertion &&
1473 (flags & IBMVNIC_VLAN_STRIPPED))
1474 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1475 ntohs(next->rx_comp.vlan_tci));
1476
032c5e82
TF		 1477 /* free the entry */
1478 next->rx_comp.first = 0;
1479 remove_buff_from_pool(adapter, rx_buff);
1480
1481 skb_put(skb, length);
1482 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1483 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1484
1485 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1486 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1487 skb->ip_summed = CHECKSUM_UNNECESSARY;
1488 }
1489
1490 length = skb->len;
1491 napi_gro_receive(napi, skb); /* send it up */
1492 netdev->stats.rx_packets++;
1493 netdev->stats.rx_bytes += length;
1494 frames_processed++;
1495 }
498cd8e4 1496 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1497
1498 if (frames_processed < budget) {
1499 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1500 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1501 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1502 napi_reschedule(napi)) {
1503 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1504 goto restart_poll;
1505 }
1506 }
1507 return frames_processed;
1508}
1509
1510#ifdef CONFIG_NET_POLL_CONTROLLER
1511static void ibmvnic_netpoll_controller(struct net_device *dev)
1512{
1513 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1514 int i;
1515
1516 replenish_pools(netdev_priv(dev));
1517 for (i = 0; i < adapter->req_rx_queues; i++)
1518 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1519 adapter->rx_scrq[i]);
1520}
1521#endif
1522
1523static const struct net_device_ops ibmvnic_netdev_ops = {
1524 .ndo_open = ibmvnic_open,
1525 .ndo_stop = ibmvnic_close,
1526 .ndo_start_xmit = ibmvnic_xmit,
1527 .ndo_set_rx_mode = ibmvnic_set_multi,
1528 .ndo_set_mac_address = ibmvnic_set_mac,
1529 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1530 .ndo_tx_timeout = ibmvnic_tx_timeout,
1531#ifdef CONFIG_NET_POLL_CONTROLLER
1532 .ndo_poll_controller = ibmvnic_netpoll_controller,
1533#endif
1534};
1535
1536/* ethtool functions */
1537
8a43379f
PR		 1538static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1539 struct ethtool_link_ksettings *cmd)
032c5e82 1540{
8a43379f
PR		 1541 u32 supported, advertising;
1542
1543 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1544 SUPPORTED_FIBRE);
8a43379f 1545 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1546 ADVERTISED_FIBRE);
8a43379f
PR		 1547 cmd->base.speed = SPEED_1000;
1548 cmd->base.duplex = DUPLEX_FULL;
1549 cmd->base.port = PORT_FIBRE;
1550 cmd->base.phy_address = 0;
1551 cmd->base.autoneg = AUTONEG_ENABLE;
1552
1553 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1554 supported);
1555 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1556 advertising);
1557
032c5e82
TF		 1558 return 0;
1559}
1560
1561static void ibmvnic_get_drvinfo(struct net_device *dev,
1562 struct ethtool_drvinfo *info)
1563{
1564 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1565 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1566}
1567
1568static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1569{
1570 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1571
1572 return adapter->msg_enable;
1573}
1574
1575static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1576{
1577 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1578
1579 adapter->msg_enable = data;
1580}
1581
1582static u32 ibmvnic_get_link(struct net_device *netdev)
1583{
1584 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1585
1586 /* Don't need to send a query because we request a logical link up at
1587 * init and then we wait for link state indications
1588 */
1589 return adapter->logical_link_state;
1590}
1591
1592static void ibmvnic_get_ringparam(struct net_device *netdev,
1593 struct ethtool_ringparam *ring)
1594{
1595 ring->rx_max_pending = 0;
1596 ring->tx_max_pending = 0;
1597 ring->rx_mini_max_pending = 0;
1598 ring->rx_jumbo_max_pending = 0;
1599 ring->rx_pending = 0;
1600 ring->tx_pending = 0;
1601 ring->rx_mini_pending = 0;
1602 ring->rx_jumbo_pending = 0;
1603}
1604
1605static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1606{
1607 int i;
1608
1609 if (stringset != ETH_SS_STATS)
1610 return;
1611
1612 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1613 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1614}
1615
1616static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1617{
1618 switch (sset) {
1619 case ETH_SS_STATS:
1620 return ARRAY_SIZE(ibmvnic_stats);
1621 default:
1622 return -EOPNOTSUPP;
1623 }
1624}
1625
1626static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1627 struct ethtool_stats *stats, u64 *data)
1628{
1629 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1630 union ibmvnic_crq crq;
1631 int i;
1632
1633 memset(&crq, 0, sizeof(crq));
1634 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1635 crq.request_statistics.cmd = REQUEST_STATISTICS;
1636 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1637 crq.request_statistics.len =
1638 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1639
1640 /* Wait for data to be written */
1641 init_completion(&adapter->stats_done);
db5d0b59 1642 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1643 wait_for_completion(&adapter->stats_done);
1644
1645 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1646 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1647}
1648
1649static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1650 .get_drvinfo = ibmvnic_get_drvinfo,
1651 .get_msglevel = ibmvnic_get_msglevel,
1652 .set_msglevel = ibmvnic_set_msglevel,
1653 .get_link = ibmvnic_get_link,
1654 .get_ringparam = ibmvnic_get_ringparam,
1655 .get_strings = ibmvnic_get_strings,
1656 .get_sset_count = ibmvnic_get_sset_count,
1657 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1658 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1659};
1660
1661/* Routines for managing CRQs/sCRQs */
1662
1663static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1664 struct ibmvnic_sub_crq_queue *scrq)
1665{
1666 struct device *dev = &adapter->vdev->dev;
1667 long rc;
1668
1669 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1670
1671 /* Close the sub-crqs */
1672 do {
1673 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1674 adapter->vdev->unit_address,
1675 scrq->crq_num);
1676 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1677
ffa73855
TF		 1678 if (rc) {
1679 netdev_err(adapter->netdev,
1680 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1681 scrq->crq_num, rc);
1682 }
1683
032c5e82
TF		 1684 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1685 DMA_BIDIRECTIONAL);
1686 free_pages((unsigned long)scrq->msgs, 2);
1687 kfree(scrq);
1688}
1689
1690static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1691 *adapter)
1692{
1693 struct device *dev = &adapter->vdev->dev;
1694 struct ibmvnic_sub_crq_queue *scrq;
1695 int rc;
1696
1bb3c739 1697 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1698 if (!scrq)
1699 return NULL;
1700
7f7adc50 1701 scrq->msgs =
1bb3c739 1702 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1703 if (!scrq->msgs) {
1704 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1705 goto zero_page_failed;
1706 }
1707
1708 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1709 DMA_BIDIRECTIONAL);
1710 if (dma_mapping_error(dev, scrq->msg_token)) {
1711 dev_warn(dev, "Couldn't map crq queue messages page\n");
1712 goto map_failed;
1713 }
1714
1715 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1716 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1717
1718 if (rc == H_RESOURCE)
1719 rc = ibmvnic_reset_crq(adapter);
1720
1721 if (rc == H_CLOSED) {
1722 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1723 } else if (rc) {
1724 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1725 goto reg_failed;
1726 }
1727
032c5e82
TF		 1728 scrq->adapter = adapter;
1729 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1730 spin_lock_init(&scrq->lock);
1731
1732 netdev_dbg(adapter->netdev,
1733 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1734 scrq->crq_num, scrq->hw_irq, scrq->irq);
1735
1736 return scrq;
1737
032c5e82
TF		 1738reg_failed:
1739 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1740 DMA_BIDIRECTIONAL);
1741map_failed:
1742 free_pages((unsigned long)scrq->msgs, 2);
1743zero_page_failed:
1744 kfree(scrq);
1745
1746 return NULL;
1747}
1748
1749static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1750{
1751 int i;
1752
1753 if (adapter->tx_scrq) {
b510888f
NF		 1754 for (i = 0; i < adapter->req_tx_queues; i++) {
1755 if (!adapter->tx_scrq[i])
1756 continue;
1757
1758 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1759 free_irq(adapter->tx_scrq[i]->irq,
1760 adapter->tx_scrq[i]);
88eb98a0 1761 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1762 adapter->tx_scrq[i]->irq = 0;
032c5e82 1763 }
b510888f
NF		 1764
1765 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1766 }
1767
9501df3c 1768 kfree(adapter->tx_scrq);
032c5e82
TF		 1769 adapter->tx_scrq = NULL;
1770 }
1771
1772 if (adapter->rx_scrq) {
b510888f
NF		 1773 for (i = 0; i < adapter->req_rx_queues; i++) {
1774 if (!adapter->rx_scrq[i])
1775 continue;
1776
1777 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1778 free_irq(adapter->rx_scrq[i]->irq,
1779 adapter->rx_scrq[i]);
88eb98a0 1780 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1781 adapter->rx_scrq[i]->irq = 0;
032c5e82 1782 }
032c5e82 1783
b510888f
NF		 1784 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1785 }
ea22d51a 1786
b510888f 1787 kfree(adapter->rx_scrq);
ea22d51a
TF		 1788 adapter->rx_scrq = NULL;
1789 }
ea22d51a
TF		 1790}
1791
032c5e82
TF		 1792static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1793 struct ibmvnic_sub_crq_queue *scrq)
1794{
1795 struct device *dev = &adapter->vdev->dev;
1796 unsigned long rc;
1797
1798 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1799 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1800 if (rc)
1801 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1802 scrq->hw_irq, rc);
1803 return rc;
1804}
1805
1806static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1807 struct ibmvnic_sub_crq_queue *scrq)
1808{
1809 struct device *dev = &adapter->vdev->dev;
1810 unsigned long rc;
1811
1812 if (scrq->hw_irq > 0x100000000ULL) {
1813 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1814 return 1;
1815 }
1816
1817 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1818 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1819 if (rc)
1820 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1821 scrq->hw_irq, rc);
1822 return rc;
1823}
1824
1825static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1826 struct ibmvnic_sub_crq_queue *scrq)
1827{
1828 struct device *dev = &adapter->vdev->dev;
1829 struct ibmvnic_tx_buff *txbuff;
1830 union sub_crq *next;
1831 int index;
1832 int i, j;
ad7775dc 1833 u8 first;
032c5e82
TF		 1834
1835restart_loop:
1836 while (pending_scrq(adapter, scrq)) {
1837 unsigned int pool = scrq->pool_index;
1838
1839 next = ibmvnic_next_scrq(adapter, scrq);
1840 for (i = 0; i < next->tx_comp.num_comps; i++) {
1841 if (next->tx_comp.rcs[i]) {
1842 dev_err(dev, "tx error %x\n",
1843 next->tx_comp.rcs[i]);
1844 continue;
1845 }
1846 index = be32_to_cpu(next->tx_comp.correlators[i]);
1847 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1848
1849 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1850 if (!txbuff->data_dma[j])
1851 continue;
1852
1853 txbuff->data_dma[j] = 0;
032c5e82 1854 }
ad7775dc
TF		 1855 /* if sub_crq was sent indirectly */
1856 first = txbuff->indir_arr[0].generic.first;
1857 if (first == IBMVNIC_CRQ_CMD) {
1858 dma_unmap_single(dev, txbuff->indir_dma,
1859 sizeof(txbuff->indir_arr),
1860 DMA_TO_DEVICE);
1861 }
032c5e82 1862
142c0ac4 1863 if (txbuff->last_frag) {
032c5e82 1864 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 1865 txbuff->skb = NULL;
142c0ac4 1866 }
032c5e82
TF		 1867
1868 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1869 producer_index] = index;
1870 adapter->tx_pool[pool].producer_index =
1871 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1872 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1873 }
1874 /* remove tx_comp scrq*/
1875 next->tx_comp.first = 0;
7c3e7de3
NF		 1876
1877 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1878 (adapter->req_tx_entries_per_subcrq / 2) &&
1879 __netif_subqueue_stopped(adapter->netdev,
1880 scrq->pool_index)) {
1881 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
1882 netdev_info(adapter->netdev, "Started queue %d\n",
1883 scrq->pool_index);
1884 }
032c5e82
TF		 1885 }
1886
1887 enable_scrq_irq(adapter, scrq);
1888
1889 if (pending_scrq(adapter, scrq)) {
1890 disable_scrq_irq(adapter, scrq);
1891 goto restart_loop;
1892 }
1893
1894 return 0;
1895}
1896
1897static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1898{
1899 struct ibmvnic_sub_crq_queue *scrq = instance;
1900 struct ibmvnic_adapter *adapter = scrq->adapter;
1901
1902 disable_scrq_irq(adapter, scrq);
1903 ibmvnic_complete_tx(adapter, scrq);
1904
1905 return IRQ_HANDLED;
1906}
1907
1908static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1909{
1910 struct ibmvnic_sub_crq_queue *scrq = instance;
1911 struct ibmvnic_adapter *adapter = scrq->adapter;
1912
1913 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1914 disable_scrq_irq(adapter, scrq);
1915 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1916 }
1917
1918 return IRQ_HANDLED;
1919}
1920
ea22d51a
TF		 1921static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1922{
1923 struct device *dev = &adapter->vdev->dev;
1924 struct ibmvnic_sub_crq_queue *scrq;
1925 int i = 0, j = 0;
1926 int rc = 0;
1927
1928 for (i = 0; i < adapter->req_tx_queues; i++) {
1929 scrq = adapter->tx_scrq[i];
1930 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1931
99c1790e 1932 if (!scrq->irq) {
ea22d51a
TF		 1933 rc = -EINVAL;
1934 dev_err(dev, "Error mapping irq\n");
1935 goto req_tx_irq_failed;
1936 }
1937
1938 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1939 0, "ibmvnic_tx", scrq);
1940
1941 if (rc) {
1942 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1943 scrq->irq, rc);
1944 irq_dispose_mapping(scrq->irq);
1945 goto req_rx_irq_failed;
1946 }
1947 }
1948
1949 for (i = 0; i < adapter->req_rx_queues; i++) {
1950 scrq = adapter->rx_scrq[i];
1951 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1952 if (!scrq->irq) {
ea22d51a
TF		 1953 rc = -EINVAL;
1954 dev_err(dev, "Error mapping irq\n");
1955 goto req_rx_irq_failed;
1956 }
1957 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1958 0, "ibmvnic_rx", scrq);
1959 if (rc) {
1960 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1961 scrq->irq, rc);
1962 irq_dispose_mapping(scrq->irq);
1963 goto req_rx_irq_failed;
1964 }
1965 }
1966 return rc;
1967
1968req_rx_irq_failed:
8bf371e6 1969 for (j = 0; j < i; j++) {
ea22d51a
TF		 1970 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1971 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1972 }
ea22d51a
TF		 1973 i = adapter->req_tx_queues;
1974req_tx_irq_failed:
8bf371e6 1975 for (j = 0; j < i; j++) {
ea22d51a
TF		 1976 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1977 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1978 }
b510888f 1979 release_sub_crqs(adapter);
ea22d51a
TF		 1980 return rc;
1981}
1982
d346b9bc 1983static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 1984{
1985 struct device *dev = &adapter->vdev->dev;
1986 struct ibmvnic_sub_crq_queue **allqueues;
1987 int registered_queues = 0;
032c5e82
TF		 1988 int total_queues;
1989 int more = 0;
ea22d51a 1990 int i;
032c5e82 1991
032c5e82
TF		 1992 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1993
1bb3c739 1994 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 1995 if (!allqueues)
d346b9bc 1996 return -1;
032c5e82
TF		 1997
1998 for (i = 0; i < total_queues; i++) {
1999 allqueues[i] = init_sub_crq_queue(adapter);
2000 if (!allqueues[i]) {
2001 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2002 break;
2003 }
2004 registered_queues++;
2005 }
2006
2007 /* Make sure we were able to register the minimum number of queues */
2008 if (registered_queues <
2009 adapter->min_tx_queues + adapter->min_rx_queues) {
2010 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2011 goto tx_failed;
2012 }
2013
2014 /* Distribute the failed allocated queues*/
2015 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2016 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2017 switch (i % 3) {
2018 case 0:
2019 if (adapter->req_rx_queues > adapter->min_rx_queues)
2020 adapter->req_rx_queues--;
2021 else
2022 more++;
2023 break;
2024 case 1:
2025 if (adapter->req_tx_queues > adapter->min_tx_queues)
2026 adapter->req_tx_queues--;
2027 else
2028 more++;
2029 break;
2030 }
2031 }
2032
2033 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2034 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2035 if (!adapter->tx_scrq)
2036 goto tx_failed;
2037
2038 for (i = 0; i < adapter->req_tx_queues; i++) {
2039 adapter->tx_scrq[i] = allqueues[i];
2040 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2041 }
2042
2043 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2044 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2045 if (!adapter->rx_scrq)
2046 goto rx_failed;
2047
2048 for (i = 0; i < adapter->req_rx_queues; i++) {
2049 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2050 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2051 }
2052
d346b9bc
NF		 2053 kfree(allqueues);
2054 return 0;
2055
2056rx_failed:
2057 kfree(adapter->tx_scrq);
2058 adapter->tx_scrq = NULL;
2059tx_failed:
2060 for (i = 0; i < registered_queues; i++)
2061 release_sub_crq_queue(adapter, allqueues[i]);
2062 kfree(allqueues);
2063 return -1;
2064}
2065
2066static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2067{
2068 struct device *dev = &adapter->vdev->dev;
2069 union ibmvnic_crq crq;
d346b9bc
NF		 2070
2071 if (!retry) {
2072 /* Sub-CRQ entries are 32 byte long */
2073 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2074
2075 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2076 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2077 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2078 return;
2079 }
2080
2081 /* Get the minimum between the queried max and the entries
2082 * that fit in our PAGE_SIZE
2083 */
2084 adapter->req_tx_entries_per_subcrq =
2085 adapter->max_tx_entries_per_subcrq > entries_page ?
2086 entries_page : adapter->max_tx_entries_per_subcrq;
2087 adapter->req_rx_add_entries_per_subcrq =
2088 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2089 entries_page : adapter->max_rx_add_entries_per_subcrq;
2090
2091 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2092 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2093 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2094
2095 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2096 }
2097
032c5e82
TF		 2098 memset(&crq, 0, sizeof(crq));
2099 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2100 crq.request_capability.cmd = REQUEST_CAPABILITY;
2101
2102 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2103 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2104 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2105 ibmvnic_send_crq(adapter, &crq);
2106
2107 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2108 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2109 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2110 ibmvnic_send_crq(adapter, &crq);
2111
2112 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2113 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2114 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2115 ibmvnic_send_crq(adapter, &crq);
2116
2117 crq.request_capability.capability =
2118 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2119 crq.request_capability.number =
de89e854 2120 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2121 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2122 ibmvnic_send_crq(adapter, &crq);
2123
2124 crq.request_capability.capability =
2125 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2126 crq.request_capability.number =
de89e854 2127 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2128 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2129 ibmvnic_send_crq(adapter, &crq);
2130
2131 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2132 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2133 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2134 ibmvnic_send_crq(adapter, &crq);
2135
2136 if (adapter->netdev->flags & IFF_PROMISC) {
2137 if (adapter->promisc_supported) {
2138 crq.request_capability.capability =
2139 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2140 crq.request_capability.number = cpu_to_be64(1);
901e040a 2141 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2142 ibmvnic_send_crq(adapter, &crq);
2143 }
2144 } else {
2145 crq.request_capability.capability =
2146 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2147 crq.request_capability.number = cpu_to_be64(0);
901e040a 2148 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2149 ibmvnic_send_crq(adapter, &crq);
2150 }
032c5e82
TF		 2151}
2152
2153static int pending_scrq(struct ibmvnic_adapter *adapter,
2154 struct ibmvnic_sub_crq_queue *scrq)
2155{
2156 union sub_crq *entry = &scrq->msgs[scrq->cur];
2157
90c8014c
NF		 2158 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2159 adapter->state == VNIC_CLOSING)
032c5e82
TF		 2160 return 1;
2161 else
2162 return 0;
2163}
2164
2165static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2166 struct ibmvnic_sub_crq_queue *scrq)
2167{
2168 union sub_crq *entry;
2169 unsigned long flags;
2170
2171 spin_lock_irqsave(&scrq->lock, flags);
2172 entry = &scrq->msgs[scrq->cur];
2173 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2174 if (++scrq->cur == scrq->size)
2175 scrq->cur = 0;
2176 } else {
2177 entry = NULL;
2178 }
2179 spin_unlock_irqrestore(&scrq->lock, flags);
2180
2181 return entry;
2182}
2183
2184static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2185{
2186 struct ibmvnic_crq_queue *queue = &adapter->crq;
2187 union ibmvnic_crq *crq;
2188
2189 crq = &queue->msgs[queue->cur];
2190 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2191 if (++queue->cur == queue->size)
2192 queue->cur = 0;
2193 } else {
2194 crq = NULL;
2195 }
2196
2197 return crq;
2198}
2199
2200static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2201 union sub_crq *sub_crq)
2202{
2203 unsigned int ua = adapter->vdev->unit_address;
2204 struct device *dev = &adapter->vdev->dev;
2205 u64 *u64_crq = (u64 *)sub_crq;
2206 int rc;
2207
2208 netdev_dbg(adapter->netdev,
2209 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2210 (unsigned long int)cpu_to_be64(remote_handle),
2211 (unsigned long int)cpu_to_be64(u64_crq[0]),
2212 (unsigned long int)cpu_to_be64(u64_crq[1]),
2213 (unsigned long int)cpu_to_be64(u64_crq[2]),
2214 (unsigned long int)cpu_to_be64(u64_crq[3]));
2215
2216 /* Make sure the hypervisor sees the complete request */
2217 mb();
2218
2219 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2220 cpu_to_be64(remote_handle),
2221 cpu_to_be64(u64_crq[0]),
2222 cpu_to_be64(u64_crq[1]),
2223 cpu_to_be64(u64_crq[2]),
2224 cpu_to_be64(u64_crq[3]));
2225
2226 if (rc) {
2227 if (rc == H_CLOSED)
2228 dev_warn(dev, "CRQ Queue closed\n");
2229 dev_err(dev, "Send error (rc=%d)\n", rc);
2230 }
2231
2232 return rc;
2233}
2234
ad7775dc
TF		 2235static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2236 u64 remote_handle, u64 ioba, u64 num_entries)
2237{
2238 unsigned int ua = adapter->vdev->unit_address;
2239 struct device *dev = &adapter->vdev->dev;
2240 int rc;
2241
2242 /* Make sure the hypervisor sees the complete request */
2243 mb();
2244 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2245 cpu_to_be64(remote_handle),
2246 ioba, num_entries);
2247
2248 if (rc) {
2249 if (rc == H_CLOSED)
2250 dev_warn(dev, "CRQ Queue closed\n");
2251 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2252 }
2253
2254 return rc;
2255}
2256
032c5e82
TF		 2257static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2258 union ibmvnic_crq *crq)
2259{
2260 unsigned int ua = adapter->vdev->unit_address;
2261 struct device *dev = &adapter->vdev->dev;
2262 u64 *u64_crq = (u64 *)crq;
2263 int rc;
2264
2265 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2266 (unsigned long int)cpu_to_be64(u64_crq[0]),
2267 (unsigned long int)cpu_to_be64(u64_crq[1]));
2268
2269 /* Make sure the hypervisor sees the complete request */
2270 mb();
2271
2272 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2273 cpu_to_be64(u64_crq[0]),
2274 cpu_to_be64(u64_crq[1]));
2275
2276 if (rc) {
2277 if (rc == H_CLOSED)
2278 dev_warn(dev, "CRQ Queue closed\n");
2279 dev_warn(dev, "Send error (rc=%d)\n", rc);
2280 }
2281
2282 return rc;
2283}
2284
2285static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2286{
2287 union ibmvnic_crq crq;
2288
2289 memset(&crq, 0, sizeof(crq));
2290 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2291 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2292 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2293
2294 return ibmvnic_send_crq(adapter, &crq);
2295}
2296
032c5e82
TF		 2297static int send_version_xchg(struct ibmvnic_adapter *adapter)
2298{
2299 union ibmvnic_crq crq;
2300
2301 memset(&crq, 0, sizeof(crq));
2302 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2303 crq.version_exchange.cmd = VERSION_EXCHANGE;
2304 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2305
2306 return ibmvnic_send_crq(adapter, &crq);
2307}
2308
2309static void send_login(struct ibmvnic_adapter *adapter)
2310{
2311 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2312 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2313 struct device *dev = &adapter->vdev->dev;
2314 dma_addr_t rsp_buffer_token;
2315 dma_addr_t buffer_token;
2316 size_t rsp_buffer_size;
2317 union ibmvnic_crq crq;
032c5e82
TF		 2318 size_t buffer_size;
2319 __be64 *tx_list_p;
2320 __be64 *rx_list_p;
2321 int i;
2322
2323 buffer_size =
2324 sizeof(struct ibmvnic_login_buffer) +
2325 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2326
2327 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2328 if (!login_buffer)
2329 goto buf_alloc_failed;
2330
2331 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2332 DMA_TO_DEVICE);
2333 if (dma_mapping_error(dev, buffer_token)) {
2334 dev_err(dev, "Couldn't map login buffer\n");
2335 goto buf_map_failed;
2336 }
2337
498cd8e4
JA		 2338 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2339 sizeof(u64) * adapter->req_tx_queues +
2340 sizeof(u64) * adapter->req_rx_queues +
2341 sizeof(u64) * adapter->req_rx_queues +
2342 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2343
2344 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2345 if (!login_rsp_buffer)
2346 goto buf_rsp_alloc_failed;
2347
2348 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2349 rsp_buffer_size, DMA_FROM_DEVICE);
2350 if (dma_mapping_error(dev, rsp_buffer_token)) {
2351 dev_err(dev, "Couldn't map login rsp buffer\n");
2352 goto buf_rsp_map_failed;
2353 }
661a2622 2354
032c5e82
TF		 2355 adapter->login_buf = login_buffer;
2356 adapter->login_buf_token = buffer_token;
2357 adapter->login_buf_sz = buffer_size;
2358 adapter->login_rsp_buf = login_rsp_buffer;
2359 adapter->login_rsp_buf_token = rsp_buffer_token;
2360 adapter->login_rsp_buf_sz = rsp_buffer_size;
2361
2362 login_buffer->len = cpu_to_be32(buffer_size);
2363 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2364 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2365 login_buffer->off_txcomp_subcrqs =
2366 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2367 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2368 login_buffer->off_rxcomp_subcrqs =
2369 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2370 sizeof(u64) * adapter->req_tx_queues);
2371 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2372 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2373
2374 tx_list_p = (__be64 *)((char *)login_buffer +
2375 sizeof(struct ibmvnic_login_buffer));
2376 rx_list_p = (__be64 *)((char *)login_buffer +
2377 sizeof(struct ibmvnic_login_buffer) +
2378 sizeof(u64) * adapter->req_tx_queues);
2379
2380 for (i = 0; i < adapter->req_tx_queues; i++) {
2381 if (adapter->tx_scrq[i]) {
2382 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2383 crq_num);
2384 }
2385 }
2386
2387 for (i = 0; i < adapter->req_rx_queues; i++) {
2388 if (adapter->rx_scrq[i]) {
2389 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2390 crq_num);
2391 }
2392 }
2393
2394 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2395 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2396 netdev_dbg(adapter->netdev, "%016lx\n",
2397 ((unsigned long int *)(adapter->login_buf))[i]);
2398 }
2399
2400 memset(&crq, 0, sizeof(crq));
2401 crq.login.first = IBMVNIC_CRQ_CMD;
2402 crq.login.cmd = LOGIN;
2403 crq.login.ioba = cpu_to_be32(buffer_token);
2404 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2405 ibmvnic_send_crq(adapter, &crq);
2406
2407 return;
2408
032c5e82
TF		 2409buf_rsp_map_failed:
2410 kfree(login_rsp_buffer);
2411buf_rsp_alloc_failed:
2412 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2413buf_map_failed:
2414 kfree(login_buffer);
2415buf_alloc_failed:
2416 return;
2417}
2418
2419static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2420 u32 len, u8 map_id)
2421{
2422 union ibmvnic_crq crq;
2423
2424 memset(&crq, 0, sizeof(crq));
2425 crq.request_map.first = IBMVNIC_CRQ_CMD;
2426 crq.request_map.cmd = REQUEST_MAP;
2427 crq.request_map.map_id = map_id;
2428 crq.request_map.ioba = cpu_to_be32(addr);
2429 crq.request_map.len = cpu_to_be32(len);
2430 ibmvnic_send_crq(adapter, &crq);
2431}
2432
2433static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2434{
2435 union ibmvnic_crq crq;
2436
2437 memset(&crq, 0, sizeof(crq));
2438 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2439 crq.request_unmap.cmd = REQUEST_UNMAP;
2440 crq.request_unmap.map_id = map_id;
2441 ibmvnic_send_crq(adapter, &crq);
2442}
2443
2444static void send_map_query(struct ibmvnic_adapter *adapter)
2445{
2446 union ibmvnic_crq crq;
2447
2448 memset(&crq, 0, sizeof(crq));
2449 crq.query_map.first = IBMVNIC_CRQ_CMD;
2450 crq.query_map.cmd = QUERY_MAP;
2451 ibmvnic_send_crq(adapter, &crq);
2452}
2453
2454/* Send a series of CRQs requesting various capabilities of the VNIC server */
2455static void send_cap_queries(struct ibmvnic_adapter *adapter)
2456{
2457 union ibmvnic_crq crq;
2458
901e040a 2459 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2460 memset(&crq, 0, sizeof(crq));
2461 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2462 crq.query_capability.cmd = QUERY_CAPABILITY;
2463
2464 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2465 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2466 ibmvnic_send_crq(adapter, &crq);
2467
2468 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2469 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2470 ibmvnic_send_crq(adapter, &crq);
2471
2472 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2473 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2474 ibmvnic_send_crq(adapter, &crq);
2475
2476 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2477 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2478 ibmvnic_send_crq(adapter, &crq);
2479
2480 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2481 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2482 ibmvnic_send_crq(adapter, &crq);
2483
2484 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2485 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2486 ibmvnic_send_crq(adapter, &crq);
2487
2488 crq.query_capability.capability =
2489 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2490 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2491 ibmvnic_send_crq(adapter, &crq);
2492
2493 crq.query_capability.capability =
2494 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2495 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2496 ibmvnic_send_crq(adapter, &crq);
2497
2498 crq.query_capability.capability =
2499 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2500 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2501 ibmvnic_send_crq(adapter, &crq);
2502
2503 crq.query_capability.capability =
2504 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2505 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2506 ibmvnic_send_crq(adapter, &crq);
2507
2508 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2509 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2510 ibmvnic_send_crq(adapter, &crq);
2511
2512 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2513 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2514 ibmvnic_send_crq(adapter, &crq);
2515
2516 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2517 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2518 ibmvnic_send_crq(adapter, &crq);
2519
2520 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2521 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2522 ibmvnic_send_crq(adapter, &crq);
2523
2524 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2525 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2526 ibmvnic_send_crq(adapter, &crq);
2527
2528 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2529 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2530 ibmvnic_send_crq(adapter, &crq);
2531
6052d5e2
MFV		 2532 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2533 atomic_inc(&adapter->running_cap_crqs);
2534 ibmvnic_send_crq(adapter, &crq);
2535
032c5e82 2536 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2537 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2538 ibmvnic_send_crq(adapter, &crq);
2539
2540 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2541 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2542 ibmvnic_send_crq(adapter, &crq);
2543
2544 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2545 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2546 ibmvnic_send_crq(adapter, &crq);
2547
2548 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2549 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2550 ibmvnic_send_crq(adapter, &crq);
2551
2552 crq.query_capability.capability =
2553 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2554 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2555 ibmvnic_send_crq(adapter, &crq);
2556
2557 crq.query_capability.capability =
2558 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2559 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2560 ibmvnic_send_crq(adapter, &crq);
2561
2562 crq.query_capability.capability =
2563 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2564 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2565 ibmvnic_send_crq(adapter, &crq);
2566
2567 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2568 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2569 ibmvnic_send_crq(adapter, &crq);
2570}
2571
2572static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2573{
2574 struct device *dev = &adapter->vdev->dev;
2575 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2576 union ibmvnic_crq crq;
2577 int i;
2578
2579 dma_unmap_single(dev, adapter->ip_offload_tok,
2580 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2581
2582 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2583 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2584 netdev_dbg(adapter->netdev, "%016lx\n",
2585 ((unsigned long int *)(buf))[i]);
2586
2587 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2588 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2589 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2590 buf->tcp_ipv4_chksum);
2591 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2592 buf->tcp_ipv6_chksum);
2593 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2594 buf->udp_ipv4_chksum);
2595 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2596 buf->udp_ipv6_chksum);
2597 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2598 buf->large_tx_ipv4);
2599 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2600 buf->large_tx_ipv6);
2601 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2602 buf->large_rx_ipv4);
2603 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2604 buf->large_rx_ipv6);
2605 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2606 buf->max_ipv4_header_size);
2607 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2608 buf->max_ipv6_header_size);
2609 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2610 buf->max_tcp_header_size);
2611 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2612 buf->max_udp_header_size);
2613 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2614 buf->max_large_tx_size);
2615 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2616 buf->max_large_rx_size);
2617 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2618 buf->ipv6_extension_header);
2619 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2620 buf->tcp_pseudosum_req);
2621 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2622 buf->num_ipv6_ext_headers);
2623 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2624 buf->off_ipv6_ext_headers);
2625
2626 adapter->ip_offload_ctrl_tok =
2627 dma_map_single(dev, &adapter->ip_offload_ctrl,
2628 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2629
2630 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2631 dev_err(dev, "Couldn't map ip offload control buffer\n");
2632 return;
2633 }
2634
2635 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2636 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2637 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2638 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2639 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2640
2641 /* large_tx/rx disabled for now, additional features needed */
2642 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2643 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2644 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2645 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2646
2647 adapter->netdev->features = NETIF_F_GSO;
2648
2649 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2650 adapter->netdev->features |= NETIF_F_IP_CSUM;
2651
2652 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2653 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2654
9be02cdf
TF		 2655 if ((adapter->netdev->features &
2656 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2657 adapter->netdev->features |= NETIF_F_RXCSUM;
2658
032c5e82
TF		 2659 memset(&crq, 0, sizeof(crq));
2660 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2661 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2662 crq.control_ip_offload.len =
2663 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2664 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2665 ibmvnic_send_crq(adapter, &crq);
2666}
2667
2668static void handle_error_info_rsp(union ibmvnic_crq *crq,
2669 struct ibmvnic_adapter *adapter)
2670{
2671 struct device *dev = &adapter->vdev->dev;
96183182 2672 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2673 unsigned long flags;
2674 bool found = false;
2675 int i;
2676
2677 if (!crq->request_error_rsp.rc.code) {
2678 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2679 crq->request_error_rsp.rc.code);
2680 return;
2681 }
2682
2683 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2684 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2685 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2686 found = true;
2687 list_del(&error_buff->list);
2688 break;
2689 }
2690 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2691
2692 if (!found) {
2693 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2694 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2695 return;
2696 }
2697
2698 dev_err(dev, "Detailed info for error id %x:",
75224c93 2699 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2700
2701 for (i = 0; i < error_buff->len; i++) {
2702 pr_cont("%02x", (int)error_buff->buff[i]);
2703 if (i % 8 == 7)
2704 pr_cont(" ");
2705 }
2706 pr_cont("\n");
2707
2708 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2709 DMA_FROM_DEVICE);
2710 kfree(error_buff->buff);
2711 kfree(error_buff);
2712}
2713
2f9de9ba
NF		 2714static void request_error_information(struct ibmvnic_adapter *adapter,
2715 union ibmvnic_crq *err_crq)
032c5e82 2716{
032c5e82 2717 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2718 struct net_device *netdev = adapter->netdev;
032c5e82 2719 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2720 unsigned long timeout = msecs_to_jiffies(30000);
2721 union ibmvnic_crq crq;
032c5e82 2722 unsigned long flags;
2f9de9ba 2723 int rc, detail_len;
032c5e82
TF		 2724
2725 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2726 if (!error_buff)
2727 return;
2728
2f9de9ba 2729 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2730 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2731 if (!error_buff->buff) {
2732 kfree(error_buff);
2733 return;
2734 }
2735
2736 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2737 DMA_FROM_DEVICE);
2738 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2739 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2740 kfree(error_buff->buff);
2741 kfree(error_buff);
2742 return;
2743 }
2744
032c5e82 2745 error_buff->len = detail_len;
2f9de9ba 2746 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2747
2748 spin_lock_irqsave(&adapter->error_list_lock, flags);
2749 list_add_tail(&error_buff->list, &adapter->errors);
2750 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2751
2f9de9ba
NF		 2752 memset(&crq, 0, sizeof(crq));
2753 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2754 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2755 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2756 crq.request_error_info.len = cpu_to_be32(detail_len);
2757 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2758
2759 rc = ibmvnic_send_crq(adapter, &crq);
2760 if (rc) {
2761 netdev_err(netdev, "failed to request error information\n");
2762 goto err_info_fail;
2763 }
2764
2765 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2766 netdev_err(netdev, "timeout waiting for error information\n");
2767 goto err_info_fail;
2768 }
2769
2770 return;
2771
2772err_info_fail:
2773 spin_lock_irqsave(&adapter->error_list_lock, flags);
2774 list_del(&error_buff->list);
2775 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2776
2777 kfree(error_buff->buff);
2778 kfree(error_buff);
2779}
2780
2781static void handle_error_indication(union ibmvnic_crq *crq,
2782 struct ibmvnic_adapter *adapter)
2783{
2784 struct device *dev = &adapter->vdev->dev;
2785
2786 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2787 crq->error_indication.flags
2788 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2789 be32_to_cpu(crq->error_indication.error_id),
2790 be16_to_cpu(crq->error_indication.error_cause));
2791
2792 if (be32_to_cpu(crq->error_indication.error_id))
2793 request_error_information(adapter, crq);
ed651a10
NF		 2794
2795 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2796 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 2797 else
2798 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 2799}
2800
2801static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2802 struct ibmvnic_adapter *adapter)
2803{
2804 struct net_device *netdev = adapter->netdev;
2805 struct device *dev = &adapter->vdev->dev;
2806 long rc;
2807
2808 rc = crq->change_mac_addr_rsp.rc.code;
2809 if (rc) {
2810 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2811 return;
2812 }
2813 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2814 ETH_ALEN);
2815}
2816
2817static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2818 struct ibmvnic_adapter *adapter)
2819{
2820 struct device *dev = &adapter->vdev->dev;
2821 u64 *req_value;
2822 char *name;
2823
901e040a 2824 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2825 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2826 case REQ_TX_QUEUES:
2827 req_value = &adapter->req_tx_queues;
2828 name = "tx";
2829 break;
2830 case REQ_RX_QUEUES:
2831 req_value = &adapter->req_rx_queues;
2832 name = "rx";
2833 break;
2834 case REQ_RX_ADD_QUEUES:
2835 req_value = &adapter->req_rx_add_queues;
2836 name = "rx_add";
2837 break;
2838 case REQ_TX_ENTRIES_PER_SUBCRQ:
2839 req_value = &adapter->req_tx_entries_per_subcrq;
2840 name = "tx_entries_per_subcrq";
2841 break;
2842 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2843 req_value = &adapter->req_rx_add_entries_per_subcrq;
2844 name = "rx_add_entries_per_subcrq";
2845 break;
2846 case REQ_MTU:
2847 req_value = &adapter->req_mtu;
2848 name = "mtu";
2849 break;
2850 case PROMISC_REQUESTED:
2851 req_value = &adapter->promisc;
2852 name = "promisc";
2853 break;
2854 default:
2855 dev_err(dev, "Got invalid cap request rsp %d\n",
2856 crq->request_capability.capability);
2857 return;
2858 }
2859
2860 switch (crq->request_capability_rsp.rc.code) {
2861 case SUCCESS:
2862 break;
2863 case PARTIALSUCCESS:
2864 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2865 *req_value,
28f4d165 2866 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2867 number), name);
b510888f 2868 release_sub_crqs(adapter);
28f4d165 2869 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 2870 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 2871 return;
2872 default:
2873 dev_err(dev, "Error %d in request cap rsp\n",
2874 crq->request_capability_rsp.rc.code);
2875 return;
2876 }
2877
2878 /* Done receiving requested capabilities, query IP offload support */
901e040a 2879 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2880 union ibmvnic_crq newcrq;
2881 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2882 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2883 &adapter->ip_offload_buf;
2884
249168ad 2885 adapter->wait_capability = false;
032c5e82
TF		 2886 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2887 buf_sz,
2888 DMA_FROM_DEVICE);
2889
2890 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2891 if (!firmware_has_feature(FW_FEATURE_CMO))
2892 dev_err(dev, "Couldn't map offload buffer\n");
2893 return;
2894 }
2895
2896 memset(&newcrq, 0, sizeof(newcrq));
2897 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2898 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2899 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2900 newcrq.query_ip_offload.ioba =
2901 cpu_to_be32(adapter->ip_offload_tok);
2902
2903 ibmvnic_send_crq(adapter, &newcrq);
2904 }
2905}
2906
2907static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2908 struct ibmvnic_adapter *adapter)
2909{
2910 struct device *dev = &adapter->vdev->dev;
2911 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2912 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 2913 int i;
2914
2915 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2916 DMA_BIDIRECTIONAL);
2917 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2918 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2919
498cd8e4
JA		 2920 /* If the number of queues requested can't be allocated by the
2921 * server, the login response will return with code 1. We will need
2922 * to resend the login buffer with fewer queues requested.
2923 */
2924 if (login_rsp_crq->generic.rc.code) {
2925 adapter->renegotiate = true;
2926 complete(&adapter->init_done);
2927 return 0;
2928 }
2929
032c5e82
TF		 2930 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2931 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2932 netdev_dbg(adapter->netdev, "%016lx\n",
2933 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2934 }
2935
2936 /* Sanity checks */
2937 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2938 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2939 adapter->req_rx_add_queues !=
2940 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2941 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2942 ibmvnic_remove(adapter->vdev);
2943 return -EIO;
2944 }
2945 complete(&adapter->init_done);
2946
032c5e82
TF		 2947 return 0;
2948}
2949
2950static void handle_request_map_rsp(union ibmvnic_crq *crq,
2951 struct ibmvnic_adapter *adapter)
2952{
2953 struct device *dev = &adapter->vdev->dev;
2954 u8 map_id = crq->request_map_rsp.map_id;
2955 int tx_subcrqs;
2956 int rx_subcrqs;
2957 long rc;
2958 int i;
2959
2960 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2961 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2962
2963 rc = crq->request_map_rsp.rc.code;
2964 if (rc) {
2965 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2966 adapter->map_id--;
2967 /* need to find and zero tx/rx_pool map_id */
2968 for (i = 0; i < tx_subcrqs; i++) {
2969 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2970 adapter->tx_pool[i].long_term_buff.map_id = 0;
2971 }
2972 for (i = 0; i < rx_subcrqs; i++) {
2973 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2974 adapter->rx_pool[i].long_term_buff.map_id = 0;
2975 }
2976 }
2977 complete(&adapter->fw_done);
2978}
2979
2980static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2981 struct ibmvnic_adapter *adapter)
2982{
2983 struct device *dev = &adapter->vdev->dev;
2984 long rc;
2985
2986 rc = crq->request_unmap_rsp.rc.code;
2987 if (rc)
2988 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2989}
2990
2991static void handle_query_map_rsp(union ibmvnic_crq *crq,
2992 struct ibmvnic_adapter *adapter)
2993{
2994 struct net_device *netdev = adapter->netdev;
2995 struct device *dev = &adapter->vdev->dev;
2996 long rc;
2997
2998 rc = crq->query_map_rsp.rc.code;
2999 if (rc) {
3000 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3001 return;
3002 }
3003 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3004 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3005 crq->query_map_rsp.free_pages);
3006}
3007
3008static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3009 struct ibmvnic_adapter *adapter)
3010{
3011 struct net_device *netdev = adapter->netdev;
3012 struct device *dev = &adapter->vdev->dev;
3013 long rc;
3014
901e040a 3015 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3016 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3017 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3018 rc = crq->query_capability.rc.code;
3019 if (rc) {
3020 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3021 goto out;
3022 }
3023
3024 switch (be16_to_cpu(crq->query_capability.capability)) {
3025 case MIN_TX_QUEUES:
3026 adapter->min_tx_queues =
de89e854 3027 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3028 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3029 adapter->min_tx_queues);
3030 break;
3031 case MIN_RX_QUEUES:
3032 adapter->min_rx_queues =
de89e854 3033 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3034 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3035 adapter->min_rx_queues);
3036 break;
3037 case MIN_RX_ADD_QUEUES:
3038 adapter->min_rx_add_queues =
de89e854 3039 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3040 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3041 adapter->min_rx_add_queues);
3042 break;
3043 case MAX_TX_QUEUES:
3044 adapter->max_tx_queues =
de89e854 3045 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3046 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3047 adapter->max_tx_queues);
3048 break;
3049 case MAX_RX_QUEUES:
3050 adapter->max_rx_queues =
de89e854 3051 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3052 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3053 adapter->max_rx_queues);
3054 break;
3055 case MAX_RX_ADD_QUEUES:
3056 adapter->max_rx_add_queues =
de89e854 3057 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3058 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3059 adapter->max_rx_add_queues);
3060 break;
3061 case MIN_TX_ENTRIES_PER_SUBCRQ:
3062 adapter->min_tx_entries_per_subcrq =
de89e854 3063 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3064 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3065 adapter->min_tx_entries_per_subcrq);
3066 break;
3067 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3068 adapter->min_rx_add_entries_per_subcrq =
de89e854 3069 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3070 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3071 adapter->min_rx_add_entries_per_subcrq);
3072 break;
3073 case MAX_TX_ENTRIES_PER_SUBCRQ:
3074 adapter->max_tx_entries_per_subcrq =
de89e854 3075 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3076 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3077 adapter->max_tx_entries_per_subcrq);
3078 break;
3079 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3080 adapter->max_rx_add_entries_per_subcrq =
de89e854 3081 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3082 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3083 adapter->max_rx_add_entries_per_subcrq);
3084 break;
3085 case TCP_IP_OFFLOAD:
3086 adapter->tcp_ip_offload =
de89e854 3087 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3088 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3089 adapter->tcp_ip_offload);
3090 break;
3091 case PROMISC_SUPPORTED:
3092 adapter->promisc_supported =
de89e854 3093 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3094 netdev_dbg(netdev, "promisc_supported = %lld\n",
3095 adapter->promisc_supported);
3096 break;
3097 case MIN_MTU:
de89e854 3098 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3099 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3100 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3101 break;
3102 case MAX_MTU:
de89e854 3103 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3104 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3105 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3106 break;
3107 case MAX_MULTICAST_FILTERS:
3108 adapter->max_multicast_filters =
de89e854 3109 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3110 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3111 adapter->max_multicast_filters);
3112 break;
3113 case VLAN_HEADER_INSERTION:
3114 adapter->vlan_header_insertion =
de89e854 3115 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3116 if (adapter->vlan_header_insertion)
3117 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3118 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3119 adapter->vlan_header_insertion);
3120 break;
6052d5e2
MFV		 3121 case RX_VLAN_HEADER_INSERTION:
3122 adapter->rx_vlan_header_insertion =
3123 be64_to_cpu(crq->query_capability.number);
3124 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3125 adapter->rx_vlan_header_insertion);
3126 break;
032c5e82
TF		 3127 case MAX_TX_SG_ENTRIES:
3128 adapter->max_tx_sg_entries =
de89e854 3129 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3130 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3131 adapter->max_tx_sg_entries);
3132 break;
3133 case RX_SG_SUPPORTED:
3134 adapter->rx_sg_supported =
de89e854 3135 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3136 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3137 adapter->rx_sg_supported);
3138 break;
3139 case OPT_TX_COMP_SUB_QUEUES:
3140 adapter->opt_tx_comp_sub_queues =
de89e854 3141 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3142 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3143 adapter->opt_tx_comp_sub_queues);
3144 break;
3145 case OPT_RX_COMP_QUEUES:
3146 adapter->opt_rx_comp_queues =
de89e854 3147 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3148 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3149 adapter->opt_rx_comp_queues);
3150 break;
3151 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3152 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3153 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3154 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3155 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3156 break;
3157 case OPT_TX_ENTRIES_PER_SUBCRQ:
3158 adapter->opt_tx_entries_per_subcrq =
de89e854 3159 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3160 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3161 adapter->opt_tx_entries_per_subcrq);
3162 break;
3163 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3164 adapter->opt_rxba_entries_per_subcrq =
de89e854 3165 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3166 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3167 adapter->opt_rxba_entries_per_subcrq);
3168 break;
3169 case TX_RX_DESC_REQ:
3170 adapter->tx_rx_desc_req = crq->query_capability.number;
3171 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3172 adapter->tx_rx_desc_req);
3173 break;
3174
3175 default:
3176 netdev_err(netdev, "Got invalid cap rsp %d\n",
3177 crq->query_capability.capability);
3178 }
3179
3180out:
249168ad
TF		 3181 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3182 adapter->wait_capability = false;
d346b9bc 3183 ibmvnic_send_req_caps(adapter, 0);
249168ad 3184 }
032c5e82
TF		 3185}
3186
032c5e82
TF		 3187static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3188 struct ibmvnic_adapter *adapter)
3189{
3190 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3191 struct net_device *netdev = adapter->netdev;
3192 struct device *dev = &adapter->vdev->dev;
993a82b0 3193 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3194 long rc;
3195
3196 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3197 (unsigned long int)cpu_to_be64(u64_crq[0]),
3198 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3199 switch (gen_crq->first) {
3200 case IBMVNIC_CRQ_INIT_RSP:
3201 switch (gen_crq->cmd) {
3202 case IBMVNIC_CRQ_INIT:
3203 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3204 adapter->from_passive_init = true;
3205 complete(&adapter->init_done);
032c5e82
TF		 3206 break;
3207 case IBMVNIC_CRQ_INIT_COMPLETE:
3208 dev_info(dev, "Partner initialization complete\n");
3209 send_version_xchg(adapter);
3210 break;
3211 default:
3212 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3213 }
3214 return;
3215 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3216 netif_carrier_off(netdev);
032c5e82 3217 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3218 dev_info(dev, "Migrated, re-enabling adapter\n");
3219 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3220 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3221 dev_info(dev, "Backing device failover detected\n");
ed651a10 3222 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3223 } else {
3224 /* The adapter lost the connection */
3225 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3226 gen_crq->cmd);
ed651a10 3227 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3228 }
3229 return;
3230 case IBMVNIC_CRQ_CMD_RSP:
3231 break;
3232 default:
3233 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3234 gen_crq->first);
3235 return;
3236 }
3237
3238 switch (gen_crq->cmd) {
3239 case VERSION_EXCHANGE_RSP:
3240 rc = crq->version_exchange_rsp.rc.code;
3241 if (rc) {
3242 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3243 break;
3244 }
3245 dev_info(dev, "Partner protocol version is %d\n",
3246 crq->version_exchange_rsp.version);
3247 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3248 ibmvnic_version)
3249 ibmvnic_version =
3250 be16_to_cpu(crq->version_exchange_rsp.version);
3251 send_cap_queries(adapter);
3252 break;
3253 case QUERY_CAPABILITY_RSP:
3254 handle_query_cap_rsp(crq, adapter);
3255 break;
3256 case QUERY_MAP_RSP:
3257 handle_query_map_rsp(crq, adapter);
3258 break;
3259 case REQUEST_MAP_RSP:
3260 handle_request_map_rsp(crq, adapter);
3261 break;
3262 case REQUEST_UNMAP_RSP:
3263 handle_request_unmap_rsp(crq, adapter);
3264 break;
3265 case REQUEST_CAPABILITY_RSP:
3266 handle_request_cap_rsp(crq, adapter);
3267 break;
3268 case LOGIN_RSP:
3269 netdev_dbg(netdev, "Got Login Response\n");
3270 handle_login_rsp(crq, adapter);
3271 break;
3272 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3273 netdev_dbg(netdev,
3274 "Got Logical Link State Response, state: %d rc: %d\n",
3275 crq->logical_link_state_rsp.link_state,
3276 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3277 adapter->logical_link_state =
3278 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3279 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3280 complete(&adapter->init_done);
032c5e82
TF		 3281 break;
3282 case LINK_STATE_INDICATION:
3283 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3284 adapter->phys_link_state =
3285 crq->link_state_indication.phys_link_state;
3286 adapter->logical_link_state =
3287 crq->link_state_indication.logical_link_state;
3288 break;
3289 case CHANGE_MAC_ADDR_RSP:
3290 netdev_dbg(netdev, "Got MAC address change Response\n");
3291 handle_change_mac_rsp(crq, adapter);
3292 break;
3293 case ERROR_INDICATION:
3294 netdev_dbg(netdev, "Got Error Indication\n");
3295 handle_error_indication(crq, adapter);
3296 break;
3297 case REQUEST_ERROR_RSP:
3298 netdev_dbg(netdev, "Got Error Detail Response\n");
3299 handle_error_info_rsp(crq, adapter);
3300 break;
3301 case REQUEST_STATISTICS_RSP:
3302 netdev_dbg(netdev, "Got Statistics Response\n");
3303 complete(&adapter->stats_done);
3304 break;
032c5e82
TF		 3305 case QUERY_IP_OFFLOAD_RSP:
3306 netdev_dbg(netdev, "Got Query IP offload Response\n");
3307 handle_query_ip_offload_rsp(adapter);
3308 break;
3309 case MULTICAST_CTRL_RSP:
3310 netdev_dbg(netdev, "Got multicast control Response\n");
3311 break;
3312 case CONTROL_IP_OFFLOAD_RSP:
3313 netdev_dbg(netdev, "Got Control IP offload Response\n");
3314 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3315 sizeof(adapter->ip_offload_ctrl),
3316 DMA_TO_DEVICE);
bd0b6723 3317 complete(&adapter->init_done);
032c5e82 3318 break;
032c5e82
TF		 3319 case COLLECT_FW_TRACE_RSP:
3320 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3321 complete(&adapter->fw_done);
3322 break;
3323 default:
3324 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3325 gen_crq->cmd);
3326 }
3327}
3328
3329static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3330{
3331 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3332
6c267b3d 3333 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3334 return IRQ_HANDLED;
3335}
3336
3337static void ibmvnic_tasklet(void *data)
3338{
3339 struct ibmvnic_adapter *adapter = data;
032c5e82 3340 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3341 union ibmvnic_crq *crq;
3342 unsigned long flags;
3343 bool done = false;
3344
3345 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3346 while (!done) {
3347 /* Pull all the valid messages off the CRQ */
3348 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3349 ibmvnic_handle_crq(crq, adapter);
3350 crq->generic.first = 0;
3351 }
ed7ecbf7
BK		 3352
3353 /* remain in tasklet until all
3354 * capabilities responses are received
3355 */
3356 if (!adapter->wait_capability)
3357 done = true;
032c5e82 3358 }
249168ad
TF		 3359 /* if capabilities CRQ's were sent in this tasklet, the following
3360 * tasklet must wait until all responses are received
3361 */
3362 if (atomic_read(&adapter->running_cap_crqs) != 0)
3363 adapter->wait_capability = true;
032c5e82 3364 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3365}
3366
3367static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3368{
3369 struct vio_dev *vdev = adapter->vdev;
3370 int rc;
3371
3372 do {
3373 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3374 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3375
3376 if (rc)
3377 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3378
3379 return rc;
3380}
3381
3382static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3383{
3384 struct ibmvnic_crq_queue *crq = &adapter->crq;
3385 struct device *dev = &adapter->vdev->dev;
3386 struct vio_dev *vdev = adapter->vdev;
3387 int rc;
3388
3389 /* Close the CRQ */
3390 do {
3391 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3392 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3393
3394 /* Clean out the queue */
3395 memset(crq->msgs, 0, PAGE_SIZE);
3396 crq->cur = 0;
3397
3398 /* And re-open it again */
3399 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3400 crq->msg_token, PAGE_SIZE);
3401
3402 if (rc == H_CLOSED)
3403 /* Adapter is good, but other end is not ready */
3404 dev_warn(dev, "Partner adapter not ready\n");
3405 else if (rc != 0)
3406 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3407
3408 return rc;
3409}
3410
f992887c 3411static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3412{
3413 struct ibmvnic_crq_queue *crq = &adapter->crq;
3414 struct vio_dev *vdev = adapter->vdev;
3415 long rc;
3416
f992887c
NF		 3417 if (!crq->msgs)
3418 return;
3419
032c5e82
TF		 3420 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3421 free_irq(vdev->irq, adapter);
6c267b3d 3422 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3423 do {
3424 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3425 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3426
3427 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3428 DMA_BIDIRECTIONAL);
3429 free_page((unsigned long)crq->msgs);
f992887c 3430 crq->msgs = NULL;
032c5e82
TF		 3431}
3432
f992887c 3433static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3434{
3435 struct ibmvnic_crq_queue *crq = &adapter->crq;
3436 struct device *dev = &adapter->vdev->dev;
3437 struct vio_dev *vdev = adapter->vdev;
3438 int rc, retrc = -ENOMEM;
3439
f992887c
NF		 3440 if (crq->msgs)
3441 return 0;
3442
032c5e82
TF		 3443 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3444 /* Should we allocate more than one page? */
3445
3446 if (!crq->msgs)
3447 return -ENOMEM;
3448
3449 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3450 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3451 DMA_BIDIRECTIONAL);
3452 if (dma_mapping_error(dev, crq->msg_token))
3453 goto map_failed;
3454
3455 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3456 crq->msg_token, PAGE_SIZE);
3457
3458 if (rc == H_RESOURCE)
3459 /* maybe kexecing and resource is busy. try a reset */
3460 rc = ibmvnic_reset_crq(adapter);
3461 retrc = rc;
3462
3463 if (rc == H_CLOSED) {
3464 dev_warn(dev, "Partner adapter not ready\n");
3465 } else if (rc) {
3466 dev_warn(dev, "Error %d opening adapter\n", rc);
3467 goto reg_crq_failed;
3468 }
3469
3470 retrc = 0;
3471
6c267b3d
TF		 3472 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3473 (unsigned long)adapter);
3474
032c5e82
TF		 3475 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3476 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3477 adapter);
3478 if (rc) {
3479 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3480 vdev->irq, rc);
3481 goto req_irq_failed;
3482 }
3483
3484 rc = vio_enable_interrupts(vdev);
3485 if (rc) {
3486 dev_err(dev, "Error %d enabling interrupts\n", rc);
3487 goto req_irq_failed;
3488 }
3489
3490 crq->cur = 0;
3491 spin_lock_init(&crq->lock);
3492
3493 return retrc;
3494
3495req_irq_failed:
6c267b3d 3496 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3497 do {
3498 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3499 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3500reg_crq_failed:
3501 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3502map_failed:
3503 free_page((unsigned long)crq->msgs);
f992887c 3504 crq->msgs = NULL;
032c5e82
TF		 3505 return retrc;
3506}
3507
f6ef6408 3508static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3509{
f6ef6408 3510 struct device *dev = &adapter->vdev->dev;
ea22d51a 3511 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3512 int rc;
3513
f992887c 3514 rc = init_crq_queue(adapter);
f6ef6408
JA		 3515 if (rc) {
3516 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3517 return rc;
3518 }
3519
017892c1
JA		 3520 adapter->from_passive_init = false;
3521
f6ef6408
JA		 3522 init_completion(&adapter->init_done);
3523 ibmvnic_send_crq_init(adapter);
3524 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3525 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 3526 return -1;
3527 }
3528
3529 if (adapter->from_passive_init) {
3530 adapter->state = VNIC_OPEN;
3531 adapter->from_passive_init = false;
f6ef6408
JA		 3532 return -1;
3533 }
3534
1bb3c739
NF		 3535 rc = init_sub_crqs(adapter);
3536 if (rc) {
3537 dev_err(dev, "Initialization of sub crqs failed\n");
3538 release_crq_queue(adapter);
3539 }
3540
3541 return rc;
f6ef6408
JA		 3542}
3543
3544static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3545{
032c5e82
TF		 3546 struct ibmvnic_adapter *adapter;
3547 struct net_device *netdev;
3548 unsigned char *mac_addr_p;
032c5e82
TF		 3549 int rc;
3550
3551 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3552 dev->unit_address);
3553
3554 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3555 VETH_MAC_ADDR, NULL);
3556 if (!mac_addr_p) {
3557 dev_err(&dev->dev,
3558 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3559 __FILE__, __LINE__);
3560 return 0;
3561 }
3562
3563 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3564 IBMVNIC_MAX_TX_QUEUES);
3565 if (!netdev)
3566 return -ENOMEM;
3567
3568 adapter = netdev_priv(netdev);
90c8014c 3569 adapter->state = VNIC_PROBING;
032c5e82
TF		 3570 dev_set_drvdata(&dev->dev, netdev);
3571 adapter->vdev = dev;
3572 adapter->netdev = netdev;
3573
3574 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3575 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3576 netdev->irq = dev->irq;
3577 netdev->netdev_ops = &ibmvnic_netdev_ops;
3578 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3579 SET_NETDEV_DEV(netdev, &dev->dev);
3580
3581 spin_lock_init(&adapter->stats_lock);
3582
032c5e82 3583 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3584 spin_lock_init(&adapter->error_list_lock);
032c5e82 3585
ed651a10
NF		 3586 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3587 INIT_LIST_HEAD(&adapter->rwi_list);
3588 mutex_init(&adapter->reset_lock);
3589 mutex_init(&adapter->rwi_lock);
3590 adapter->resetting = false;
3591
f6ef6408
JA		 3592 rc = ibmvnic_init(adapter);
3593 if (rc) {
3594 free_netdev(netdev);
3595 return rc;
032c5e82 3596 }
032c5e82 3597
f39f0d1e 3598 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82
TF		 3599
3600 rc = register_netdev(netdev);
3601 if (rc) {
3602 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3603 free_netdev(netdev);
3604 return rc;
032c5e82
TF		 3605 }
3606 dev_info(&dev->dev, "ibmvnic registered\n");
3607
90c8014c 3608 adapter->state = VNIC_PROBED;
032c5e82 3609 return 0;
032c5e82
TF		 3610}
3611
3612static int ibmvnic_remove(struct vio_dev *dev)
3613{
3614 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3615 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3616
90c8014c 3617 adapter->state = VNIC_REMOVING;
032c5e82 3618 unregister_netdev(netdev);
ed651a10 3619 mutex_lock(&adapter->reset_lock);
37489055
NF		 3620
3621 release_resources(adapter);
3622 release_sub_crqs(adapter);
3623 release_crq_queue(adapter);
3624
90c8014c
NF		 3625 adapter->state = VNIC_REMOVED;
3626
ed651a10 3627 mutex_unlock(&adapter->reset_lock);
032c5e82
TF		 3628 free_netdev(netdev);
3629 dev_set_drvdata(&dev->dev, NULL);
3630
3631 return 0;
3632}
3633
3634static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3635{
3636 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3637 struct ibmvnic_adapter *adapter;
3638 struct iommu_table *tbl;
3639 unsigned long ret = 0;
3640 int i;
3641
3642 tbl = get_iommu_table_base(&vdev->dev);
3643
3644 /* netdev inits at probe time along with the structures we need below*/
3645 if (!netdev)
3646 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3647
3648 adapter = netdev_priv(netdev);
3649
3650 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3651 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3652
3653 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3654 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3655
3656 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3657 i++)
3658 ret += adapter->rx_pool[i].size *
3659 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3660
3661 return ret;
3662}
3663
3664static int ibmvnic_resume(struct device *dev)
3665{
3666 struct net_device *netdev = dev_get_drvdata(dev);
3667 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3668 int i;
3669
3670 /* kick the interrupt handlers just in case we lost an interrupt */
3671 for (i = 0; i < adapter->req_rx_queues; i++)
3672 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3673 adapter->rx_scrq[i]);
3674
3675 return 0;
3676}
3677
3678static struct vio_device_id ibmvnic_device_table[] = {
3679 {"network", "IBM,vnic"},
3680 {"", "" }
3681};
3682MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3683
3684static const struct dev_pm_ops ibmvnic_pm_ops = {
3685 .resume = ibmvnic_resume
3686};
3687
3688static struct vio_driver ibmvnic_driver = {
3689 .id_table = ibmvnic_device_table,
3690 .probe = ibmvnic_probe,
3691 .remove = ibmvnic_remove,
3692 .get_desired_dma = ibmvnic_get_desired_dma,
3693 .name = ibmvnic_driver_name,
3694 .pm = &ibmvnic_pm_ops,
3695};
3696
3697/* module functions */
3698static int __init ibmvnic_module_init(void)
3699{
3700 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3701 IBMVNIC_DRIVER_VERSION);
3702
3703 return vio_register_driver(&ibmvnic_driver);
3704}
3705
3706static void __exit ibmvnic_module_exit(void)
3707{
3708 vio_unregister_driver(&ibmvnic_driver);
3709}
3710
3711module_init(ibmvnic_module_init);
3712module_exit(ibmvnic_module_exit);
Ubuntu Artful kernel mirror