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[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
62#include <linux/in.h>
63#include <linux/ip.h>
ad7775dc 64#include <linux/ipv6.h>
032c5e82
TF		 65#include <linux/irq.h>
66#include <linux/kthread.h>
67#include <linux/seq_file.h>
032c5e82
TF		 68#include <linux/interrupt.h>
69#include <net/net_namespace.h>
70#include <asm/hvcall.h>
71#include <linux/atomic.h>
72#include <asm/vio.h>
73#include <asm/iommu.h>
74#include <linux/uaccess.h>
75#include <asm/firmware.h>
65dc6891 76#include <linux/workqueue.h>
6052d5e2 77#include <linux/if_vlan.h>
032c5e82
TF		 78
79#include "ibmvnic.h"
80
81static const char ibmvnic_driver_name[] = "ibmvnic";
82static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
78b07ac1 84MODULE_AUTHOR("Santiago Leon");
032c5e82
TF		 85MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90static int ibmvnic_remove(struct vio_dev *);
91static void release_sub_crqs(struct ibmvnic_adapter *);
92static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
ad7775dc 98static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 99static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static int ibmvnic_poll(struct napi_struct *napi, int data);
109static void send_map_query(struct ibmvnic_adapter *adapter);
110static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 112static void send_login(struct ibmvnic_adapter *adapter);
113static void send_cap_queries(struct ibmvnic_adapter *adapter);
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
8c0543ad
NF		 166static void reset_long_term_buff(struct ibmvnic_adapter *adapter,
167 struct ibmvnic_long_term_buff *ltb)
168{
169 memset(ltb->buff, 0, ltb->size);
170
171 init_completion(&adapter->fw_done);
172 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
173 wait_for_completion(&adapter->fw_done);
174}
175
032c5e82
TF		 176static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
177 struct ibmvnic_long_term_buff *ltb, int size)
178{
179 struct device *dev = &adapter->vdev->dev;
180
181 ltb->size = size;
182 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
183 GFP_KERNEL);
184
185 if (!ltb->buff) {
186 dev_err(dev, "Couldn't alloc long term buffer\n");
187 return -ENOMEM;
188 }
189 ltb->map_id = adapter->map_id;
190 adapter->map_id++;
db5d0b59
NF		 191
192 init_completion(&adapter->fw_done);
032c5e82
TF		 193 send_request_map(adapter, ltb->addr,
194 ltb->size, ltb->map_id);
032c5e82
TF		 195 wait_for_completion(&adapter->fw_done);
196 return 0;
197}
198
199static void free_long_term_buff(struct ibmvnic_adapter *adapter,
200 struct ibmvnic_long_term_buff *ltb)
201{
202 struct device *dev = &adapter->vdev->dev;
203
c657e32c
NF		 204 if (!ltb->buff)
205 return;
206
ed651a10
NF		 207 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
208 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 209 send_request_unmap(adapter, ltb->map_id);
59af56c2 210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 211}
212
f185a49a
TF		 213static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
214{
215 int i;
216
217 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
218 i++)
219 adapter->rx_pool[i].active = 0;
220}
221
032c5e82
TF		 222static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
223 struct ibmvnic_rx_pool *pool)
224{
225 int count = pool->size - atomic_read(&pool->available);
226 struct device *dev = &adapter->vdev->dev;
227 int buffers_added = 0;
228 unsigned long lpar_rc;
229 union sub_crq sub_crq;
230 struct sk_buff *skb;
231 unsigned int offset;
232 dma_addr_t dma_addr;
233 unsigned char *dst;
234 u64 *handle_array;
235 int shift = 0;
236 int index;
237 int i;
238
f185a49a
TF		 239 if (!pool->active)
240 return;
241
032c5e82
TF		 242 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
243 be32_to_cpu(adapter->login_rsp_buf->
244 off_rxadd_subcrqs));
245
246 for (i = 0; i < count; ++i) {
247 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
248 if (!skb) {
249 dev_err(dev, "Couldn't replenish rx buff\n");
250 adapter->replenish_no_mem++;
251 break;
252 }
253
254 index = pool->free_map[pool->next_free];
255
256 if (pool->rx_buff[index].skb)
257 dev_err(dev, "Inconsistent free_map!\n");
258
259 /* Copy the skb to the long term mapped DMA buffer */
260 offset = index * pool->buff_size;
261 dst = pool->long_term_buff.buff + offset;
262 memset(dst, 0, pool->buff_size);
263 dma_addr = pool->long_term_buff.addr + offset;
264 pool->rx_buff[index].data = dst;
265
266 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
267 pool->rx_buff[index].dma = dma_addr;
268 pool->rx_buff[index].skb = skb;
269 pool->rx_buff[index].pool_index = pool->index;
270 pool->rx_buff[index].size = pool->buff_size;
271
272 memset(&sub_crq, 0, sizeof(sub_crq));
273 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
274 sub_crq.rx_add.correlator =
275 cpu_to_be64((u64)&pool->rx_buff[index]);
276 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
277 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
278
279 /* The length field of the sCRQ is defined to be 24 bits so the
280 * buffer size needs to be left shifted by a byte before it is
281 * converted to big endian to prevent the last byte from being
282 * truncated.
283 */
284#ifdef __LITTLE_ENDIAN__
285 shift = 8;
286#endif
287 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
288
289 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
290 &sub_crq);
291 if (lpar_rc != H_SUCCESS)
292 goto failure;
293
294 buffers_added++;
295 adapter->replenish_add_buff_success++;
296 pool->next_free = (pool->next_free + 1) % pool->size;
297 }
298 atomic_add(buffers_added, &pool->available);
299 return;
300
301failure:
302 dev_info(dev, "replenish pools failure\n");
303 pool->free_map[pool->next_free] = index;
304 pool->rx_buff[index].skb = NULL;
305 if (!dma_mapping_error(dev, dma_addr))
306 dma_unmap_single(dev, dma_addr, pool->buff_size,
307 DMA_FROM_DEVICE);
308
309 dev_kfree_skb_any(skb);
310 adapter->replenish_add_buff_failure++;
311 atomic_add(buffers_added, &pool->available);
f185a49a
TF		 312
313 if (lpar_rc == H_CLOSED) {
314 /* Disable buffer pool replenishment and report carrier off if
315 * queue is closed. Firmware guarantees that a signal will
316 * be sent to the driver, triggering a reset.
317 */
318 deactivate_rx_pools(adapter);
319 netif_carrier_off(adapter->netdev);
320 }
032c5e82
TF		 321}
322
323static void replenish_pools(struct ibmvnic_adapter *adapter)
324{
325 int i;
326
032c5e82
TF		 327 adapter->replenish_task_cycles++;
328 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
329 i++) {
330 if (adapter->rx_pool[i].active)
331 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
332 }
333}
334
7bbc27a4
NF		 335static void release_stats_token(struct ibmvnic_adapter *adapter)
336{
337 struct device *dev = &adapter->vdev->dev;
338
339 if (!adapter->stats_token)
340 return;
341
342 dma_unmap_single(dev, adapter->stats_token,
343 sizeof(struct ibmvnic_statistics),
344 DMA_FROM_DEVICE);
345 adapter->stats_token = 0;
346}
347
348static int init_stats_token(struct ibmvnic_adapter *adapter)
349{
350 struct device *dev = &adapter->vdev->dev;
351 dma_addr_t stok;
352
353 stok = dma_map_single(dev, &adapter->stats,
354 sizeof(struct ibmvnic_statistics),
355 DMA_FROM_DEVICE);
356 if (dma_mapping_error(dev, stok)) {
357 dev_err(dev, "Couldn't map stats buffer\n");
358 return -1;
359 }
360
361 adapter->stats_token = stok;
362 return 0;
363}
364
8c0543ad
NF		 365static int reset_rx_pools(struct ibmvnic_adapter *adapter)
366{
367 struct ibmvnic_rx_pool *rx_pool;
368 int rx_scrqs;
369 int i, j;
370
371 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
372 for (i = 0; i < rx_scrqs; i++) {
373 rx_pool = &adapter->rx_pool[i];
374
375 reset_long_term_buff(adapter, &rx_pool->long_term_buff);
376
377 for (j = 0; j < rx_pool->size; j++)
378 rx_pool->free_map[j] = j;
379
380 memset(rx_pool->rx_buff, 0,
381 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
382
383 atomic_set(&rx_pool->available, 0);
384 rx_pool->next_alloc = 0;
385 rx_pool->next_free = 0;
386 }
387
388 return 0;
389}
390
0ffe2cb7 391static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 392{
0ffe2cb7
NF		 393 struct ibmvnic_rx_pool *rx_pool;
394 int rx_scrqs;
395 int i, j;
032c5e82 396
0ffe2cb7 397 if (!adapter->rx_pool)
032c5e82
TF		 398 return;
399
0ffe2cb7
NF		 400 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
401 for (i = 0; i < rx_scrqs; i++) {
402 rx_pool = &adapter->rx_pool[i];
403
404 kfree(rx_pool->free_map);
405 free_long_term_buff(adapter, &rx_pool->long_term_buff);
406
407 if (!rx_pool->rx_buff)
e0ebe942 408 continue;
0ffe2cb7
NF		 409
410 for (j = 0; j < rx_pool->size; j++) {
411 if (rx_pool->rx_buff[j].skb) {
412 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
413 rx_pool->rx_buff[i].skb = NULL;
414 }
415 }
416
417 kfree(rx_pool->rx_buff);
418 }
419
420 kfree(adapter->rx_pool);
421 adapter->rx_pool = NULL;
422}
423
424static int init_rx_pools(struct net_device *netdev)
425{
426 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
427 struct device *dev = &adapter->vdev->dev;
428 struct ibmvnic_rx_pool *rx_pool;
429 int rxadd_subcrqs;
430 u64 *size_array;
431 int i, j;
432
433 rxadd_subcrqs =
434 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
435 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
436 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
437
438 adapter->rx_pool = kcalloc(rxadd_subcrqs,
439 sizeof(struct ibmvnic_rx_pool),
440 GFP_KERNEL);
441 if (!adapter->rx_pool) {
442 dev_err(dev, "Failed to allocate rx pools\n");
443 return -1;
444 }
445
446 for (i = 0; i < rxadd_subcrqs; i++) {
447 rx_pool = &adapter->rx_pool[i];
448
449 netdev_dbg(adapter->netdev,
450 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
451 i, adapter->req_rx_add_entries_per_subcrq,
452 be64_to_cpu(size_array[i]));
453
454 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
455 rx_pool->index = i;
456 rx_pool->buff_size = be64_to_cpu(size_array[i]);
457 rx_pool->active = 1;
458
459 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
460 GFP_KERNEL);
461 if (!rx_pool->free_map) {
462 release_rx_pools(adapter);
463 return -1;
032c5e82 464 }
0ffe2cb7
NF		 465
466 rx_pool->rx_buff = kcalloc(rx_pool->size,
467 sizeof(struct ibmvnic_rx_buff),
468 GFP_KERNEL);
469 if (!rx_pool->rx_buff) {
470 dev_err(dev, "Couldn't alloc rx buffers\n");
471 release_rx_pools(adapter);
472 return -1;
473 }
474
475 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
476 rx_pool->size * rx_pool->buff_size)) {
477 release_rx_pools(adapter);
478 return -1;
479 }
480
481 for (j = 0; j < rx_pool->size; ++j)
482 rx_pool->free_map[j] = j;
483
484 atomic_set(&rx_pool->available, 0);
485 rx_pool->next_alloc = 0;
486 rx_pool->next_free = 0;
032c5e82 487 }
0ffe2cb7
NF		 488
489 return 0;
032c5e82
TF		 490}
491
8c0543ad
NF		 492static int reset_tx_pools(struct ibmvnic_adapter *adapter)
493{
494 struct ibmvnic_tx_pool *tx_pool;
495 int tx_scrqs;
496 int i, j;
497
498 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
499 for (i = 0; i < tx_scrqs; i++) {
500 tx_pool = &adapter->tx_pool[i];
501
502 reset_long_term_buff(adapter, &tx_pool->long_term_buff);
503
504 memset(tx_pool->tx_buff, 0,
505 adapter->req_tx_entries_per_subcrq *
506 sizeof(struct ibmvnic_tx_buff));
507
508 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
509 tx_pool->free_map[j] = j;
510
511 tx_pool->consumer_index = 0;
512 tx_pool->producer_index = 0;
513 }
514
515 return 0;
516}
517
c657e32c
NF		 518static void release_tx_pools(struct ibmvnic_adapter *adapter)
519{
520 struct ibmvnic_tx_pool *tx_pool;
521 int i, tx_scrqs;
522
523 if (!adapter->tx_pool)
524 return;
525
526 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
527 for (i = 0; i < tx_scrqs; i++) {
528 tx_pool = &adapter->tx_pool[i];
529 kfree(tx_pool->tx_buff);
530 free_long_term_buff(adapter, &tx_pool->long_term_buff);
531 kfree(tx_pool->free_map);
532 }
533
534 kfree(adapter->tx_pool);
535 adapter->tx_pool = NULL;
536}
537
538static int init_tx_pools(struct net_device *netdev)
539{
540 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
541 struct device *dev = &adapter->vdev->dev;
542 struct ibmvnic_tx_pool *tx_pool;
543 int tx_subcrqs;
544 int i, j;
545
546 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
547 adapter->tx_pool = kcalloc(tx_subcrqs,
548 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
549 if (!adapter->tx_pool)
550 return -1;
551
552 for (i = 0; i < tx_subcrqs; i++) {
553 tx_pool = &adapter->tx_pool[i];
554 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
555 sizeof(struct ibmvnic_tx_buff),
556 GFP_KERNEL);
557 if (!tx_pool->tx_buff) {
558 dev_err(dev, "tx pool buffer allocation failed\n");
559 release_tx_pools(adapter);
560 return -1;
561 }
562
563 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
564 adapter->req_tx_entries_per_subcrq *
565 adapter->req_mtu)) {
566 release_tx_pools(adapter);
567 return -1;
568 }
569
570 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
571 sizeof(int), GFP_KERNEL);
572 if (!tx_pool->free_map) {
573 release_tx_pools(adapter);
574 return -1;
575 }
576
577 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
578 tx_pool->free_map[j] = j;
579
580 tx_pool->consumer_index = 0;
581 tx_pool->producer_index = 0;
582 }
583
584 return 0;
585}
586
661a2622
NF		 587static void release_error_buffers(struct ibmvnic_adapter *adapter)
588{
589 struct device *dev = &adapter->vdev->dev;
590 struct ibmvnic_error_buff *error_buff, *tmp;
591 unsigned long flags;
592
593 spin_lock_irqsave(&adapter->error_list_lock, flags);
594 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
595 list_del(&error_buff->list);
596 dma_unmap_single(dev, error_buff->dma, error_buff->len,
597 DMA_FROM_DEVICE);
598 kfree(error_buff->buff);
599 kfree(error_buff);
600 }
601 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
602}
603
d944c3d6
JA		 604static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
605{
606 int i;
607
608 if (adapter->napi_enabled)
609 return;
610
611 for (i = 0; i < adapter->req_rx_queues; i++)
612 napi_enable(&adapter->napi[i]);
613
614 adapter->napi_enabled = true;
615}
616
617static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
618{
619 int i;
620
621 if (!adapter->napi_enabled)
622 return;
623
624 for (i = 0; i < adapter->req_rx_queues; i++)
625 napi_disable(&adapter->napi[i]);
626
627 adapter->napi_enabled = false;
628}
629
a57a5d25 630static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 631{
632 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 633 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 634 struct device *dev = &adapter->vdev->dev;
032c5e82 635
bd0b6723
JA		 636 do {
637 if (adapter->renegotiate) {
638 adapter->renegotiate = false;
b510888f 639 release_sub_crqs(adapter);
bd0b6723
JA		 640
641 reinit_completion(&adapter->init_done);
642 send_cap_queries(adapter);
643 if (!wait_for_completion_timeout(&adapter->init_done,
644 timeout)) {
645 dev_err(dev, "Capabilities query timeout\n");
646 return -1;
647 }
648 }
649
650 reinit_completion(&adapter->init_done);
651 send_login(adapter);
652 if (!wait_for_completion_timeout(&adapter->init_done,
653 timeout)) {
654 dev_err(dev, "Login timeout\n");
655 return -1;
656 }
657 } while (adapter->renegotiate);
658
a57a5d25
JA		 659 return 0;
660}
661
1b8955ee
NF		 662static void release_resources(struct ibmvnic_adapter *adapter)
663{
c7bac00b
NF		 664 int i;
665
1b8955ee
NF		 666 release_tx_pools(adapter);
667 release_rx_pools(adapter);
668
1b8955ee 669 release_stats_token(adapter);
661a2622 670 release_error_buffers(adapter);
c7bac00b
NF		 671
672 if (adapter->napi) {
673 for (i = 0; i < adapter->req_rx_queues; i++) {
674 if (&adapter->napi[i])
675 netif_napi_del(&adapter->napi[i]);
676 }
677 }
1b8955ee
NF		 678}
679
53da09e9
NF		 680static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
681{
682 struct net_device *netdev = adapter->netdev;
683 unsigned long timeout = msecs_to_jiffies(30000);
684 union ibmvnic_crq crq;
685 bool resend;
686 int rc;
687
53da09e9
NF		 688 netdev_err(netdev, "setting link state %d\n", link_state);
689 memset(&crq, 0, sizeof(crq));
690 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
691 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
692 crq.logical_link_state.link_state = link_state;
693
694 do {
695 resend = false;
696
697 reinit_completion(&adapter->init_done);
698 rc = ibmvnic_send_crq(adapter, &crq);
699 if (rc) {
700 netdev_err(netdev, "Failed to set link state\n");
701 return rc;
702 }
703
704 if (!wait_for_completion_timeout(&adapter->init_done,
705 timeout)) {
706 netdev_err(netdev, "timeout setting link state\n");
707 return -1;
708 }
709
710 if (adapter->init_done_rc == 1) {
711 /* Partuial success, delay and re-send */
712 mdelay(1000);
713 resend = true;
714 }
715 } while (resend);
716
717 return 0;
718}
719
7f3c6e6b
TF		 720static int set_real_num_queues(struct net_device *netdev)
721{
722 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
723 int rc;
724
725 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
726 if (rc) {
727 netdev_err(netdev, "failed to set the number of tx queues\n");
728 return rc;
729 }
730
731 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
732 if (rc)
733 netdev_err(netdev, "failed to set the number of rx queues\n");
734
735 return rc;
736}
737
bfc32f29 738static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 739{
bfc32f29
NF		 740 struct net_device *netdev = adapter->netdev;
741 int i, rc;
a57a5d25 742
7f3c6e6b
TF		 743 rc = set_real_num_queues(netdev);
744 if (rc)
745 return rc;
bd0b6723
JA		 746
747 rc = init_sub_crq_irqs(adapter);
748 if (rc) {
bfc32f29 749 netdev_err(netdev, "failed to initialize sub crq irqs\n");
bd0b6723
JA		 750 return -1;
751 }
752
5d5e84eb
NF		 753 rc = init_stats_token(adapter);
754 if (rc)
755 return rc;
756
032c5e82
TF		 757 adapter->map_id = 1;
758 adapter->napi = kcalloc(adapter->req_rx_queues,
759 sizeof(struct napi_struct), GFP_KERNEL);
760 if (!adapter->napi)
bfc32f29
NF		 761 return -ENOMEM;
762
032c5e82
TF		 763 for (i = 0; i < adapter->req_rx_queues; i++) {
764 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
765 NAPI_POLL_WEIGHT);
032c5e82 766 }
032c5e82 767
032c5e82 768 send_map_query(adapter);
0ffe2cb7
NF		 769
770 rc = init_rx_pools(netdev);
771 if (rc)
bfc32f29 772 return rc;
032c5e82 773
c657e32c 774 rc = init_tx_pools(netdev);
bfc32f29
NF		 775 return rc;
776}
777
ed651a10 778static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 779{
780 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 781 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 782 int i, rc;
783
90c8014c 784 adapter->state = VNIC_OPENING;
032c5e82 785 replenish_pools(adapter);
d944c3d6 786 ibmvnic_napi_enable(adapter);
bfc32f29 787
032c5e82
TF		 788 /* We're ready to receive frames, enable the sub-crq interrupts and
789 * set the logical link state to up
790 */
ed651a10
NF		 791 for (i = 0; i < adapter->req_rx_queues; i++) {
792 if (prev_state == VNIC_CLOSED)
793 enable_irq(adapter->rx_scrq[i]->irq);
794 else
795 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
796 }
032c5e82 797
ed651a10
NF		 798 for (i = 0; i < adapter->req_tx_queues; i++) {
799 if (prev_state == VNIC_CLOSED)
800 enable_irq(adapter->tx_scrq[i]->irq);
801 else
802 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
803 }
032c5e82 804
53da09e9 805 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 806 if (rc) {
807 for (i = 0; i < adapter->req_rx_queues; i++)
808 napi_disable(&adapter->napi[i]);
809 release_resources(adapter);
ed651a10 810 return rc;
bfc32f29 811 }
032c5e82 812
ed651a10
NF		 813 netif_tx_start_all_queues(netdev);
814
815 if (prev_state == VNIC_CLOSED) {
816 for (i = 0; i < adapter->req_rx_queues; i++)
817 napi_schedule(&adapter->napi[i]);
818 }
819
820 adapter->state = VNIC_OPEN;
821 return rc;
822}
823
824static int ibmvnic_open(struct net_device *netdev)
825{
826 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
827 int rc;
828
829 mutex_lock(&adapter->reset_lock);
830
831 if (adapter->state != VNIC_CLOSED) {
832 rc = ibmvnic_login(netdev);
833 if (rc) {
834 mutex_unlock(&adapter->reset_lock);
835 return rc;
836 }
837
838 rc = init_resources(adapter);
839 if (rc) {
840 netdev_err(netdev, "failed to initialize resources\n");
841 release_resources(adapter);
842 mutex_unlock(&adapter->reset_lock);
843 return rc;
844 }
845 }
846
847 rc = __ibmvnic_open(netdev);
848 mutex_unlock(&adapter->reset_lock);
849
bfc32f29 850 return rc;
032c5e82
TF		 851}
852
b41b83e9
NF		 853static void clean_tx_pools(struct ibmvnic_adapter *adapter)
854{
855 struct ibmvnic_tx_pool *tx_pool;
856 u64 tx_entries;
857 int tx_scrqs;
858 int i, j;
859
860 if (!adapter->tx_pool)
861 return;
862
863 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
864 tx_entries = adapter->req_tx_entries_per_subcrq;
865
866 /* Free any remaining skbs in the tx buffer pools */
867 for (i = 0; i < tx_scrqs; i++) {
868 tx_pool = &adapter->tx_pool[i];
869 if (!tx_pool)
870 continue;
871
872 for (j = 0; j < tx_entries; j++) {
873 if (tx_pool->tx_buff[j].skb) {
874 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
875 tx_pool->tx_buff[j].skb = NULL;
876 }
877 }
878 }
879}
880
ed651a10 881static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 882{
883 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 884 int rc = 0;
ea5509f5
JA		 885 int i;
886
90c8014c 887 adapter->state = VNIC_CLOSING;
ed651a10 888 netif_tx_stop_all_queues(netdev);
d944c3d6 889 ibmvnic_napi_disable(adapter);
46293b94
NF		 890
891 if (adapter->tx_scrq) {
892 for (i = 0; i < adapter->req_tx_queues; i++)
893 if (adapter->tx_scrq[i]->irq)
894 disable_irq(adapter->tx_scrq[i]->irq);
895 }
896
53da09e9 897 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 898 if (rc)
899 return rc;
900
901 if (adapter->rx_scrq) {
902 for (i = 0; i < adapter->req_rx_queues; i++) {
903 int retries = 10;
904
905 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
906 retries--;
907 mdelay(100);
908
909 if (retries == 0)
910 break;
911 }
912
913 if (adapter->rx_scrq[i]->irq)
914 disable_irq(adapter->rx_scrq[i]->irq);
915 }
916 }
ea5509f5 917
10f76215 918 clean_tx_pools(adapter);
90c8014c 919 adapter->state = VNIC_CLOSED;
53da09e9 920 return rc;
032c5e82
TF		 921}
922
ed651a10
NF		 923static int ibmvnic_close(struct net_device *netdev)
924{
925 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
926 int rc;
927
928 mutex_lock(&adapter->reset_lock);
929 rc = __ibmvnic_close(netdev);
930 mutex_unlock(&adapter->reset_lock);
931
932 return rc;
933}
934
ad7775dc
TF		 935/**
936 * build_hdr_data - creates L2/L3/L4 header data buffer
937 * @hdr_field - bitfield determining needed headers
938 * @skb - socket buffer
939 * @hdr_len - array of header lengths
940 * @tot_len - total length of data
941 *
942 * Reads hdr_field to determine which headers are needed by firmware.
943 * Builds a buffer containing these headers. Saves individual header
944 * lengths and total buffer length to be used to build descriptors.
945 */
946static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
947 int *hdr_len, u8 *hdr_data)
948{
949 int len = 0;
950 u8 *hdr;
951
952 hdr_len[0] = sizeof(struct ethhdr);
953
954 if (skb->protocol == htons(ETH_P_IP)) {
955 hdr_len[1] = ip_hdr(skb)->ihl * 4;
956 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
957 hdr_len[2] = tcp_hdrlen(skb);
958 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
959 hdr_len[2] = sizeof(struct udphdr);
960 } else if (skb->protocol == htons(ETH_P_IPV6)) {
961 hdr_len[1] = sizeof(struct ipv6hdr);
962 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
963 hdr_len[2] = tcp_hdrlen(skb);
964 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
965 hdr_len[2] = sizeof(struct udphdr);
966 }
967
968 memset(hdr_data, 0, 120);
969 if ((hdr_field >> 6) & 1) {
970 hdr = skb_mac_header(skb);
971 memcpy(hdr_data, hdr, hdr_len[0]);
972 len += hdr_len[0];
973 }
974
975 if ((hdr_field >> 5) & 1) {
976 hdr = skb_network_header(skb);
977 memcpy(hdr_data + len, hdr, hdr_len[1]);
978 len += hdr_len[1];
979 }
980
981 if ((hdr_field >> 4) & 1) {
982 hdr = skb_transport_header(skb);
983 memcpy(hdr_data + len, hdr, hdr_len[2]);
984 len += hdr_len[2];
985 }
986 return len;
987}
988
989/**
990 * create_hdr_descs - create header and header extension descriptors
991 * @hdr_field - bitfield determining needed headers
992 * @data - buffer containing header data
993 * @len - length of data buffer
994 * @hdr_len - array of individual header lengths
995 * @scrq_arr - descriptor array
996 *
997 * Creates header and, if needed, header extension descriptors and
998 * places them in a descriptor array, scrq_arr
999 */
1000
1001static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1002 union sub_crq *scrq_arr)
1003{
1004 union sub_crq hdr_desc;
1005 int tmp_len = len;
1006 u8 *data, *cur;
1007 int tmp;
1008
1009 while (tmp_len > 0) {
1010 cur = hdr_data + len - tmp_len;
1011
1012 memset(&hdr_desc, 0, sizeof(hdr_desc));
1013 if (cur != hdr_data) {
1014 data = hdr_desc.hdr_ext.data;
1015 tmp = tmp_len > 29 ? 29 : tmp_len;
1016 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1017 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1018 hdr_desc.hdr_ext.len = tmp;
1019 } else {
1020 data = hdr_desc.hdr.data;
1021 tmp = tmp_len > 24 ? 24 : tmp_len;
1022 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1023 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1024 hdr_desc.hdr.len = tmp;
1025 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1026 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1027 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1028 hdr_desc.hdr.flag = hdr_field << 1;
1029 }
1030 memcpy(data, cur, tmp);
1031 tmp_len -= tmp;
1032 *scrq_arr = hdr_desc;
1033 scrq_arr++;
1034 }
1035}
1036
1037/**
1038 * build_hdr_descs_arr - build a header descriptor array
1039 * @skb - socket buffer
1040 * @num_entries - number of descriptors to be sent
1041 * @subcrq - first TX descriptor
1042 * @hdr_field - bit field determining which headers will be sent
1043 *
1044 * This function will build a TX descriptor array with applicable
1045 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1046 */
1047
1048static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1049 int *num_entries, u8 hdr_field)
1050{
1051 int hdr_len[3] = {0, 0, 0};
1052 int tot_len, len;
1053 u8 *hdr_data = txbuff->hdr_data;
1054
1055 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1056 txbuff->hdr_data);
1057 len = tot_len;
1058 len -= 24;
1059 if (len > 0)
1060 num_entries += len % 29 ? len / 29 + 1 : len / 29;
1061 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1062 txbuff->indir_arr + 1);
1063}
1064
032c5e82
TF		 1065static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1066{
1067 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1068 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1069 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1070 struct device *dev = &adapter->vdev->dev;
1071 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1072 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1073 struct ibmvnic_tx_pool *tx_pool;
1074 unsigned int tx_send_failed = 0;
1075 unsigned int tx_map_failed = 0;
1076 unsigned int tx_dropped = 0;
1077 unsigned int tx_packets = 0;
1078 unsigned int tx_bytes = 0;
1079 dma_addr_t data_dma_addr;
1080 struct netdev_queue *txq;
032c5e82
TF		 1081 unsigned long lpar_rc;
1082 union sub_crq tx_crq;
1083 unsigned int offset;
ad7775dc 1084 int num_entries = 1;
032c5e82
TF		 1085 unsigned char *dst;
1086 u64 *handle_array;
1087 int index = 0;
1088 int ret = 0;
1089
ed651a10 1090 if (adapter->resetting) {
7f5b0308
TF		 1091 if (!netif_subqueue_stopped(netdev, skb))
1092 netif_stop_subqueue(netdev, queue_num);
1093 dev_kfree_skb_any(skb);
1094
032c5e82
TF		 1095 tx_send_failed++;
1096 tx_dropped++;
7f5b0308 1097 ret = NETDEV_TX_OK;
032c5e82
TF		 1098 goto out;
1099 }
1100
161b8a81
NF		 1101 tx_pool = &adapter->tx_pool[queue_num];
1102 tx_scrq = adapter->tx_scrq[queue_num];
1103 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1104 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1105 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1106
032c5e82
TF		 1107 index = tx_pool->free_map[tx_pool->consumer_index];
1108 offset = index * adapter->req_mtu;
1109 dst = tx_pool->long_term_buff.buff + offset;
1110 memset(dst, 0, adapter->req_mtu);
1111 skb_copy_from_linear_data(skb, dst, skb->len);
1112 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1113
1114 tx_pool->consumer_index =
1115 (tx_pool->consumer_index + 1) %
068d9f90 1116 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1117
1118 tx_buff = &tx_pool->tx_buff[index];
1119 tx_buff->skb = skb;
1120 tx_buff->data_dma[0] = data_dma_addr;
1121 tx_buff->data_len[0] = skb->len;
1122 tx_buff->index = index;
1123 tx_buff->pool_index = queue_num;
1124 tx_buff->last_frag = true;
032c5e82
TF		 1125
1126 memset(&tx_crq, 0, sizeof(tx_crq));
1127 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1128 tx_crq.v1.type = IBMVNIC_TX_DESC;
1129 tx_crq.v1.n_crq_elem = 1;
1130 tx_crq.v1.n_sge = 1;
1131 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1132 tx_crq.v1.correlator = cpu_to_be32(index);
1133 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1134 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1135 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1136
1137 if (adapter->vlan_header_insertion) {
1138 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1139 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1140 }
1141
1142 if (skb->protocol == htons(ETH_P_IP)) {
1143 if (ip_hdr(skb)->version == 4)
1144 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1145 else if (ip_hdr(skb)->version == 6)
1146 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1147
1148 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1149 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1150 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1151 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1152 }
1153
ad7775dc 1154 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1155 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1156 hdrs += 2;
1157 }
1158 /* determine if l2/3/4 headers are sent to firmware */
1159 if ((*hdrs >> 7) & 1 &&
1160 (skb->protocol == htons(ETH_P_IP) ||
1161 skb->protocol == htons(ETH_P_IPV6))) {
1162 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1163 tx_crq.v1.n_crq_elem = num_entries;
1164 tx_buff->indir_arr[0] = tx_crq;
1165 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1166 sizeof(tx_buff->indir_arr),
1167 DMA_TO_DEVICE);
1168 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1169 dev_kfree_skb_any(skb);
1170 tx_buff->skb = NULL;
ad7775dc
TF		 1171 if (!firmware_has_feature(FW_FEATURE_CMO))
1172 dev_err(dev, "tx: unable to map descriptor array\n");
1173 tx_map_failed++;
1174 tx_dropped++;
7f5b0308 1175 ret = NETDEV_TX_OK;
ad7775dc
TF		 1176 goto out;
1177 }
498cd8e4 1178 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1179 (u64)tx_buff->indir_dma,
1180 (u64)num_entries);
1181 } else {
498cd8e4
JA		 1182 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1183 &tx_crq);
ad7775dc 1184 }
032c5e82
TF		 1185 if (lpar_rc != H_SUCCESS) {
1186 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1187
1188 if (tx_pool->consumer_index == 0)
1189 tx_pool->consumer_index =
068d9f90 1190 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1191 else
1192 tx_pool->consumer_index--;
1193
7f5b0308
TF		 1194 dev_kfree_skb_any(skb);
1195 tx_buff->skb = NULL;
1196
b8c80b84
TF		 1197 if (lpar_rc == H_CLOSED) {
1198 /* Disable TX and report carrier off if queue is closed.
1199 * Firmware guarantees that a signal will be sent to the
1200 * driver, triggering a reset or some other action.
1201 */
1202 netif_tx_stop_all_queues(netdev);
1203 netif_carrier_off(netdev);
1204 }
7f5b0308 1205
032c5e82
TF		 1206 tx_send_failed++;
1207 tx_dropped++;
7f5b0308 1208 ret = NETDEV_TX_OK;
032c5e82
TF		 1209 goto out;
1210 }
142c0ac4 1211
58c8c0c0
BK		 1212 if (atomic_inc_return(&tx_scrq->used)
1213 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1214 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1215 netif_stop_subqueue(netdev, queue_num);
1216 }
1217
032c5e82
TF		 1218 tx_packets++;
1219 tx_bytes += skb->len;
1220 txq->trans_start = jiffies;
1221 ret = NETDEV_TX_OK;
1222
1223out:
1224 netdev->stats.tx_dropped += tx_dropped;
1225 netdev->stats.tx_bytes += tx_bytes;
1226 netdev->stats.tx_packets += tx_packets;
1227 adapter->tx_send_failed += tx_send_failed;
1228 adapter->tx_map_failed += tx_map_failed;
1229
1230 return ret;
1231}
1232
1233static void ibmvnic_set_multi(struct net_device *netdev)
1234{
1235 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1236 struct netdev_hw_addr *ha;
1237 union ibmvnic_crq crq;
1238
1239 memset(&crq, 0, sizeof(crq));
1240 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1241 crq.request_capability.cmd = REQUEST_CAPABILITY;
1242
1243 if (netdev->flags & IFF_PROMISC) {
1244 if (!adapter->promisc_supported)
1245 return;
1246 } else {
1247 if (netdev->flags & IFF_ALLMULTI) {
1248 /* Accept all multicast */
1249 memset(&crq, 0, sizeof(crq));
1250 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1251 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1252 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1253 ibmvnic_send_crq(adapter, &crq);
1254 } else if (netdev_mc_empty(netdev)) {
1255 /* Reject all multicast */
1256 memset(&crq, 0, sizeof(crq));
1257 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1258 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1259 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1260 ibmvnic_send_crq(adapter, &crq);
1261 } else {
1262 /* Accept one or more multicast(s) */
1263 netdev_for_each_mc_addr(ha, netdev) {
1264 memset(&crq, 0, sizeof(crq));
1265 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1266 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1267 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1268 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1269 ha->addr);
1270 ibmvnic_send_crq(adapter, &crq);
1271 }
1272 }
1273 }
1274}
1275
1276static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1277{
1278 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1279 struct sockaddr *addr = p;
1280 union ibmvnic_crq crq;
1281
1282 if (!is_valid_ether_addr(addr->sa_data))
1283 return -EADDRNOTAVAIL;
1284
1285 memset(&crq, 0, sizeof(crq));
1286 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1287 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1288 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1289 ibmvnic_send_crq(adapter, &crq);
1290 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1291 return 0;
1292}
1293
ed651a10
NF		 1294/**
1295 * do_reset returns zero if we are able to keep processing reset events, or
1296 * non-zero if we hit a fatal error and must halt.
1297 */
1298static int do_reset(struct ibmvnic_adapter *adapter,
1299 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1300{
ed651a10
NF		 1301 struct net_device *netdev = adapter->netdev;
1302 int i, rc;
1303
1304 netif_carrier_off(netdev);
1305 adapter->reset_reason = rwi->reset_reason;
1306
1307 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1308 rc = ibmvnic_reenable_crq_queue(adapter);
1309 if (rc)
1310 return 0;
1311 }
1312
1313 rc = __ibmvnic_close(netdev);
1314 if (rc)
1315 return rc;
1316
8cb31cfc
JA		 1317 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1318 /* remove the closed state so when we call open it appears
1319 * we are coming from the probed state.
1320 */
1321 adapter->state = VNIC_PROBED;
032c5e82 1322
8cb31cfc
JA		 1323 rc = ibmvnic_init(adapter);
1324 if (rc)
1325 return 0;
ed651a10 1326
8cb31cfc
JA		 1327 /* If the adapter was in PROBE state prior to the reset,
1328 * exit here.
1329 */
1330 if (reset_state == VNIC_PROBED)
1331 return 0;
ed651a10 1332
8cb31cfc
JA		 1333 rc = ibmvnic_login(netdev);
1334 if (rc) {
1335 adapter->state = VNIC_PROBED;
1336 return 0;
1337 }
ed651a10 1338
8c0543ad
NF		 1339 rc = reset_tx_pools(adapter);
1340 if (rc)
1341 return rc;
1342
1343 rc = reset_rx_pools(adapter);
8cb31cfc
JA		 1344 if (rc)
1345 return rc;
ed651a10 1346
8cb31cfc
JA		 1347 if (reset_state == VNIC_CLOSED)
1348 return 0;
1349 }
ed651a10
NF		 1350
1351 rc = __ibmvnic_open(netdev);
1352 if (rc) {
1353 if (list_empty(&adapter->rwi_list))
1354 adapter->state = VNIC_CLOSED;
1355 else
1356 adapter->state = reset_state;
1357
1358 return 0;
1359 }
1360
1361 netif_carrier_on(netdev);
1362
1363 /* kick napi */
1364 for (i = 0; i < adapter->req_rx_queues; i++)
1365 napi_schedule(&adapter->napi[i]);
1366
2ce9e4ef 1367 netdev_notify_peers(netdev);
ed651a10
NF		 1368 return 0;
1369}
1370
1371static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1372{
1373 struct ibmvnic_rwi *rwi;
1374
1375 mutex_lock(&adapter->rwi_lock);
1376
1377 if (!list_empty(&adapter->rwi_list)) {
1378 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1379 list);
1380 list_del(&rwi->list);
1381 } else {
1382 rwi = NULL;
1383 }
1384
1385 mutex_unlock(&adapter->rwi_lock);
1386 return rwi;
1387}
1388
1389static void free_all_rwi(struct ibmvnic_adapter *adapter)
1390{
1391 struct ibmvnic_rwi *rwi;
1392
1393 rwi = get_next_rwi(adapter);
1394 while (rwi) {
1395 kfree(rwi);
1396 rwi = get_next_rwi(adapter);
1397 }
1398}
1399
1400static void __ibmvnic_reset(struct work_struct *work)
1401{
1402 struct ibmvnic_rwi *rwi;
1403 struct ibmvnic_adapter *adapter;
1404 struct net_device *netdev;
1405 u32 reset_state;
1406 int rc;
1407
1408 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1409 netdev = adapter->netdev;
1410
1411 mutex_lock(&adapter->reset_lock);
1412 adapter->resetting = true;
1413 reset_state = adapter->state;
1414
1415 rwi = get_next_rwi(adapter);
1416 while (rwi) {
1417 rc = do_reset(adapter, rwi, reset_state);
1418 kfree(rwi);
1419 if (rc)
1420 break;
1421
1422 rwi = get_next_rwi(adapter);
1423 }
1424
1425 if (rc) {
1426 free_all_rwi(adapter);
6d0af07d 1427 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1428 return;
1429 }
1430
1431 adapter->resetting = false;
1432 mutex_unlock(&adapter->reset_lock);
1433}
1434
1435static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1436 enum ibmvnic_reset_reason reason)
1437{
1438 struct ibmvnic_rwi *rwi, *tmp;
1439 struct net_device *netdev = adapter->netdev;
1440 struct list_head *entry;
1441
1442 if (adapter->state == VNIC_REMOVING ||
1443 adapter->state == VNIC_REMOVED) {
1444 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1445 return;
1446 }
1447
1448 mutex_lock(&adapter->rwi_lock);
1449
1450 list_for_each(entry, &adapter->rwi_list) {
1451 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1452 if (tmp->reset_reason == reason) {
1453 netdev_err(netdev, "Matching reset found, skipping\n");
1454 mutex_unlock(&adapter->rwi_lock);
1455 return;
1456 }
1457 }
1458
1459 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1460 if (!rwi) {
1461 mutex_unlock(&adapter->rwi_lock);
1462 ibmvnic_close(netdev);
1463 return;
1464 }
1465
1466 rwi->reset_reason = reason;
1467 list_add_tail(&rwi->list, &adapter->rwi_list);
1468 mutex_unlock(&adapter->rwi_lock);
1469 schedule_work(&adapter->ibmvnic_reset);
1470}
1471
1472static void ibmvnic_tx_timeout(struct net_device *dev)
1473{
1474 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1475
1476 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1477}
1478
1479static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1480 struct ibmvnic_rx_buff *rx_buff)
1481{
1482 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1483
1484 rx_buff->skb = NULL;
1485
1486 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1487 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1488
1489 atomic_dec(&pool->available);
1490}
1491
1492static int ibmvnic_poll(struct napi_struct *napi, int budget)
1493{
1494 struct net_device *netdev = napi->dev;
1495 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1496 int scrq_num = (int)(napi - adapter->napi);
1497 int frames_processed = 0;
152ce47d
NF		 1498
1499 if (adapter->resetting)
1500 return 0;
1501
032c5e82
TF		 1502restart_poll:
1503 while (frames_processed < budget) {
1504 struct sk_buff *skb;
1505 struct ibmvnic_rx_buff *rx_buff;
1506 union sub_crq *next;
1507 u32 length;
1508 u16 offset;
1509 u8 flags = 0;
1510
1511 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1512 break;
1513 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1514 rx_buff =
1515 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1516 rx_comp.correlator);
1517 /* do error checking */
1518 if (next->rx_comp.rc) {
1519 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1520 /* free the entry */
1521 next->rx_comp.first = 0;
1522 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1523 continue;
032c5e82
TF		 1524 }
1525
1526 length = be32_to_cpu(next->rx_comp.len);
1527 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1528 flags = next->rx_comp.flags;
1529 skb = rx_buff->skb;
1530 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1531 length);
6052d5e2
MFV		 1532
1533 /* VLAN Header has been stripped by the system firmware and
1534 * needs to be inserted by the driver
1535 */
1536 if (adapter->rx_vlan_header_insertion &&
1537 (flags & IBMVNIC_VLAN_STRIPPED))
1538 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1539 ntohs(next->rx_comp.vlan_tci));
1540
032c5e82
TF		 1541 /* free the entry */
1542 next->rx_comp.first = 0;
1543 remove_buff_from_pool(adapter, rx_buff);
1544
1545 skb_put(skb, length);
1546 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1547 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1548
1549 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1550 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1551 skb->ip_summed = CHECKSUM_UNNECESSARY;
1552 }
1553
1554 length = skb->len;
1555 napi_gro_receive(napi, skb); /* send it up */
1556 netdev->stats.rx_packets++;
1557 netdev->stats.rx_bytes += length;
1558 frames_processed++;
1559 }
152ce47d
NF		 1560
1561 if (adapter->state != VNIC_CLOSING)
1562 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1563
1564 if (frames_processed < budget) {
1565 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1566 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1567 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1568 napi_reschedule(napi)) {
1569 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1570 goto restart_poll;
1571 }
1572 }
1573 return frames_processed;
1574}
1575
1576#ifdef CONFIG_NET_POLL_CONTROLLER
1577static void ibmvnic_netpoll_controller(struct net_device *dev)
1578{
1579 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1580 int i;
1581
1582 replenish_pools(netdev_priv(dev));
1583 for (i = 0; i < adapter->req_rx_queues; i++)
1584 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1585 adapter->rx_scrq[i]);
1586}
1587#endif
1588
1589static const struct net_device_ops ibmvnic_netdev_ops = {
1590 .ndo_open = ibmvnic_open,
1591 .ndo_stop = ibmvnic_close,
1592 .ndo_start_xmit = ibmvnic_xmit,
1593 .ndo_set_rx_mode = ibmvnic_set_multi,
1594 .ndo_set_mac_address = ibmvnic_set_mac,
1595 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1596 .ndo_tx_timeout = ibmvnic_tx_timeout,
1597#ifdef CONFIG_NET_POLL_CONTROLLER
1598 .ndo_poll_controller = ibmvnic_netpoll_controller,
1599#endif
1600};
1601
1602/* ethtool functions */
1603
8a43379f
PR		 1604static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1605 struct ethtool_link_ksettings *cmd)
032c5e82 1606{
8a43379f
PR		 1607 u32 supported, advertising;
1608
1609 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1610 SUPPORTED_FIBRE);
8a43379f 1611 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1612 ADVERTISED_FIBRE);
8a43379f
PR		 1613 cmd->base.speed = SPEED_1000;
1614 cmd->base.duplex = DUPLEX_FULL;
1615 cmd->base.port = PORT_FIBRE;
1616 cmd->base.phy_address = 0;
1617 cmd->base.autoneg = AUTONEG_ENABLE;
1618
1619 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1620 supported);
1621 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1622 advertising);
1623
032c5e82
TF		 1624 return 0;
1625}
1626
1627static void ibmvnic_get_drvinfo(struct net_device *dev,
1628 struct ethtool_drvinfo *info)
1629{
1630 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1631 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1632}
1633
1634static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1635{
1636 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1637
1638 return adapter->msg_enable;
1639}
1640
1641static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1642{
1643 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1644
1645 adapter->msg_enable = data;
1646}
1647
1648static u32 ibmvnic_get_link(struct net_device *netdev)
1649{
1650 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1651
1652 /* Don't need to send a query because we request a logical link up at
1653 * init and then we wait for link state indications
1654 */
1655 return adapter->logical_link_state;
1656}
1657
1658static void ibmvnic_get_ringparam(struct net_device *netdev,
1659 struct ethtool_ringparam *ring)
1660{
1661 ring->rx_max_pending = 0;
1662 ring->tx_max_pending = 0;
1663 ring->rx_mini_max_pending = 0;
1664 ring->rx_jumbo_max_pending = 0;
1665 ring->rx_pending = 0;
1666 ring->tx_pending = 0;
1667 ring->rx_mini_pending = 0;
1668 ring->rx_jumbo_pending = 0;
1669}
1670
1671static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1672{
1673 int i;
1674
1675 if (stringset != ETH_SS_STATS)
1676 return;
1677
1678 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1679 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1680}
1681
1682static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1683{
1684 switch (sset) {
1685 case ETH_SS_STATS:
1686 return ARRAY_SIZE(ibmvnic_stats);
1687 default:
1688 return -EOPNOTSUPP;
1689 }
1690}
1691
1692static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1693 struct ethtool_stats *stats, u64 *data)
1694{
1695 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1696 union ibmvnic_crq crq;
1697 int i;
1698
1699 memset(&crq, 0, sizeof(crq));
1700 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1701 crq.request_statistics.cmd = REQUEST_STATISTICS;
1702 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1703 crq.request_statistics.len =
1704 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1705
1706 /* Wait for data to be written */
1707 init_completion(&adapter->stats_done);
db5d0b59 1708 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1709 wait_for_completion(&adapter->stats_done);
1710
1711 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1712 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1713}
1714
1715static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1716 .get_drvinfo = ibmvnic_get_drvinfo,
1717 .get_msglevel = ibmvnic_get_msglevel,
1718 .set_msglevel = ibmvnic_set_msglevel,
1719 .get_link = ibmvnic_get_link,
1720 .get_ringparam = ibmvnic_get_ringparam,
1721 .get_strings = ibmvnic_get_strings,
1722 .get_sset_count = ibmvnic_get_sset_count,
1723 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1724 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1725};
1726
1727/* Routines for managing CRQs/sCRQs */
1728
57a49436
NF		 1729static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1730 struct ibmvnic_sub_crq_queue *scrq)
1731{
1732 int rc;
1733
1734 if (scrq->irq) {
1735 free_irq(scrq->irq, scrq);
1736 irq_dispose_mapping(scrq->irq);
1737 scrq->irq = 0;
1738 }
1739
1740 memset(scrq->msgs, 0, 2 * PAGE_SIZE);
1741 scrq->cur = 0;
1742
1743 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1744 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1745 return rc;
1746}
1747
1748static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1749{
1750 int i, rc;
1751
1752 for (i = 0; i < adapter->req_tx_queues; i++) {
1753 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1754 if (rc)
1755 return rc;
1756 }
1757
1758 for (i = 0; i < adapter->req_rx_queues; i++) {
1759 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1760 if (rc)
1761 return rc;
1762 }
1763
1764 rc = init_sub_crq_irqs(adapter);
1765 return rc;
1766}
1767
032c5e82
TF		 1768static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1769 struct ibmvnic_sub_crq_queue *scrq)
1770{
1771 struct device *dev = &adapter->vdev->dev;
1772 long rc;
1773
1774 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1775
1776 /* Close the sub-crqs */
1777 do {
1778 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1779 adapter->vdev->unit_address,
1780 scrq->crq_num);
1781 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1782
ffa73855
TF		 1783 if (rc) {
1784 netdev_err(adapter->netdev,
1785 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1786 scrq->crq_num, rc);
1787 }
1788
032c5e82
TF		 1789 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1790 DMA_BIDIRECTIONAL);
1791 free_pages((unsigned long)scrq->msgs, 2);
1792 kfree(scrq);
1793}
1794
1795static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1796 *adapter)
1797{
1798 struct device *dev = &adapter->vdev->dev;
1799 struct ibmvnic_sub_crq_queue *scrq;
1800 int rc;
1801
1bb3c739 1802 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1803 if (!scrq)
1804 return NULL;
1805
7f7adc50 1806 scrq->msgs =
1bb3c739 1807 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1808 if (!scrq->msgs) {
1809 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1810 goto zero_page_failed;
1811 }
1812
1813 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1814 DMA_BIDIRECTIONAL);
1815 if (dma_mapping_error(dev, scrq->msg_token)) {
1816 dev_warn(dev, "Couldn't map crq queue messages page\n");
1817 goto map_failed;
1818 }
1819
1820 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1821 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1822
1823 if (rc == H_RESOURCE)
1824 rc = ibmvnic_reset_crq(adapter);
1825
1826 if (rc == H_CLOSED) {
1827 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1828 } else if (rc) {
1829 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1830 goto reg_failed;
1831 }
1832
032c5e82
TF		 1833 scrq->adapter = adapter;
1834 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1835 spin_lock_init(&scrq->lock);
1836
1837 netdev_dbg(adapter->netdev,
1838 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1839 scrq->crq_num, scrq->hw_irq, scrq->irq);
1840
1841 return scrq;
1842
032c5e82
TF		 1843reg_failed:
1844 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1845 DMA_BIDIRECTIONAL);
1846map_failed:
1847 free_pages((unsigned long)scrq->msgs, 2);
1848zero_page_failed:
1849 kfree(scrq);
1850
1851 return NULL;
1852}
1853
1854static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1855{
1856 int i;
1857
1858 if (adapter->tx_scrq) {
b510888f
NF		 1859 for (i = 0; i < adapter->req_tx_queues; i++) {
1860 if (!adapter->tx_scrq[i])
1861 continue;
1862
1863 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1864 free_irq(adapter->tx_scrq[i]->irq,
1865 adapter->tx_scrq[i]);
88eb98a0 1866 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1867 adapter->tx_scrq[i]->irq = 0;
032c5e82 1868 }
b510888f
NF		 1869
1870 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1871 }
1872
9501df3c 1873 kfree(adapter->tx_scrq);
032c5e82
TF		 1874 adapter->tx_scrq = NULL;
1875 }
1876
1877 if (adapter->rx_scrq) {
b510888f
NF		 1878 for (i = 0; i < adapter->req_rx_queues; i++) {
1879 if (!adapter->rx_scrq[i])
1880 continue;
1881
1882 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1883 free_irq(adapter->rx_scrq[i]->irq,
1884 adapter->rx_scrq[i]);
88eb98a0 1885 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1886 adapter->rx_scrq[i]->irq = 0;
032c5e82 1887 }
032c5e82 1888
b510888f
NF		 1889 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1890 }
ea22d51a 1891
b510888f 1892 kfree(adapter->rx_scrq);
ea22d51a
TF		 1893 adapter->rx_scrq = NULL;
1894 }
ea22d51a
TF		 1895}
1896
032c5e82
TF		 1897static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1898 struct ibmvnic_sub_crq_queue *scrq)
1899{
1900 struct device *dev = &adapter->vdev->dev;
1901 unsigned long rc;
1902
1903 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1904 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1905 if (rc)
1906 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1907 scrq->hw_irq, rc);
1908 return rc;
1909}
1910
1911static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1912 struct ibmvnic_sub_crq_queue *scrq)
1913{
1914 struct device *dev = &adapter->vdev->dev;
1915 unsigned long rc;
1916
1917 if (scrq->hw_irq > 0x100000000ULL) {
1918 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1919 return 1;
1920 }
1921
1922 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1923 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1924 if (rc)
1925 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1926 scrq->hw_irq, rc);
1927 return rc;
1928}
1929
1930static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1931 struct ibmvnic_sub_crq_queue *scrq)
1932{
1933 struct device *dev = &adapter->vdev->dev;
1934 struct ibmvnic_tx_buff *txbuff;
1935 union sub_crq *next;
1936 int index;
1937 int i, j;
ad7775dc 1938 u8 first;
032c5e82
TF		 1939
1940restart_loop:
1941 while (pending_scrq(adapter, scrq)) {
1942 unsigned int pool = scrq->pool_index;
1943
1944 next = ibmvnic_next_scrq(adapter, scrq);
1945 for (i = 0; i < next->tx_comp.num_comps; i++) {
1946 if (next->tx_comp.rcs[i]) {
1947 dev_err(dev, "tx error %x\n",
1948 next->tx_comp.rcs[i]);
1949 continue;
1950 }
1951 index = be32_to_cpu(next->tx_comp.correlators[i]);
1952 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1953
1954 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1955 if (!txbuff->data_dma[j])
1956 continue;
1957
1958 txbuff->data_dma[j] = 0;
032c5e82 1959 }
ad7775dc
TF		 1960 /* if sub_crq was sent indirectly */
1961 first = txbuff->indir_arr[0].generic.first;
1962 if (first == IBMVNIC_CRQ_CMD) {
1963 dma_unmap_single(dev, txbuff->indir_dma,
1964 sizeof(txbuff->indir_arr),
1965 DMA_TO_DEVICE);
1966 }
032c5e82 1967
142c0ac4 1968 if (txbuff->last_frag) {
032c5e82 1969 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 1970 txbuff->skb = NULL;
142c0ac4 1971 }
032c5e82
TF		 1972
1973 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1974 producer_index] = index;
1975 adapter->tx_pool[pool].producer_index =
1976 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1977 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1978 }
1979 /* remove tx_comp scrq*/
1980 next->tx_comp.first = 0;
7c3e7de3
NF		 1981
1982 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1983 (adapter->req_tx_entries_per_subcrq / 2) &&
1984 __netif_subqueue_stopped(adapter->netdev,
1985 scrq->pool_index)) {
1986 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
1987 netdev_info(adapter->netdev, "Started queue %d\n",
1988 scrq->pool_index);
1989 }
032c5e82
TF		 1990 }
1991
1992 enable_scrq_irq(adapter, scrq);
1993
1994 if (pending_scrq(adapter, scrq)) {
1995 disable_scrq_irq(adapter, scrq);
1996 goto restart_loop;
1997 }
1998
1999 return 0;
2000}
2001
2002static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2003{
2004 struct ibmvnic_sub_crq_queue *scrq = instance;
2005 struct ibmvnic_adapter *adapter = scrq->adapter;
2006
2007 disable_scrq_irq(adapter, scrq);
2008 ibmvnic_complete_tx(adapter, scrq);
2009
2010 return IRQ_HANDLED;
2011}
2012
2013static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2014{
2015 struct ibmvnic_sub_crq_queue *scrq = instance;
2016 struct ibmvnic_adapter *adapter = scrq->adapter;
2017
2018 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2019 disable_scrq_irq(adapter, scrq);
2020 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2021 }
2022
2023 return IRQ_HANDLED;
2024}
2025
ea22d51a
TF		 2026static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2027{
2028 struct device *dev = &adapter->vdev->dev;
2029 struct ibmvnic_sub_crq_queue *scrq;
2030 int i = 0, j = 0;
2031 int rc = 0;
2032
2033 for (i = 0; i < adapter->req_tx_queues; i++) {
2034 scrq = adapter->tx_scrq[i];
2035 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2036
99c1790e 2037 if (!scrq->irq) {
ea22d51a
TF		 2038 rc = -EINVAL;
2039 dev_err(dev, "Error mapping irq\n");
2040 goto req_tx_irq_failed;
2041 }
2042
2043 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2044 0, "ibmvnic_tx", scrq);
2045
2046 if (rc) {
2047 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2048 scrq->irq, rc);
2049 irq_dispose_mapping(scrq->irq);
2050 goto req_rx_irq_failed;
2051 }
2052 }
2053
2054 for (i = 0; i < adapter->req_rx_queues; i++) {
2055 scrq = adapter->rx_scrq[i];
2056 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2057 if (!scrq->irq) {
ea22d51a
TF		 2058 rc = -EINVAL;
2059 dev_err(dev, "Error mapping irq\n");
2060 goto req_rx_irq_failed;
2061 }
2062 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2063 0, "ibmvnic_rx", scrq);
2064 if (rc) {
2065 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2066 scrq->irq, rc);
2067 irq_dispose_mapping(scrq->irq);
2068 goto req_rx_irq_failed;
2069 }
2070 }
2071 return rc;
2072
2073req_rx_irq_failed:
8bf371e6 2074 for (j = 0; j < i; j++) {
ea22d51a
TF		 2075 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2076 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2077 }
ea22d51a
TF		 2078 i = adapter->req_tx_queues;
2079req_tx_irq_failed:
8bf371e6 2080 for (j = 0; j < i; j++) {
ea22d51a
TF		 2081 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2082 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2083 }
b510888f 2084 release_sub_crqs(adapter);
ea22d51a
TF		 2085 return rc;
2086}
2087
d346b9bc 2088static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2089{
2090 struct device *dev = &adapter->vdev->dev;
2091 struct ibmvnic_sub_crq_queue **allqueues;
2092 int registered_queues = 0;
032c5e82
TF		 2093 int total_queues;
2094 int more = 0;
ea22d51a 2095 int i;
032c5e82 2096
032c5e82
TF		 2097 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2098
1bb3c739 2099 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2100 if (!allqueues)
d346b9bc 2101 return -1;
032c5e82
TF		 2102
2103 for (i = 0; i < total_queues; i++) {
2104 allqueues[i] = init_sub_crq_queue(adapter);
2105 if (!allqueues[i]) {
2106 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2107 break;
2108 }
2109 registered_queues++;
2110 }
2111
2112 /* Make sure we were able to register the minimum number of queues */
2113 if (registered_queues <
2114 adapter->min_tx_queues + adapter->min_rx_queues) {
2115 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2116 goto tx_failed;
2117 }
2118
2119 /* Distribute the failed allocated queues*/
2120 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2121 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2122 switch (i % 3) {
2123 case 0:
2124 if (adapter->req_rx_queues > adapter->min_rx_queues)
2125 adapter->req_rx_queues--;
2126 else
2127 more++;
2128 break;
2129 case 1:
2130 if (adapter->req_tx_queues > adapter->min_tx_queues)
2131 adapter->req_tx_queues--;
2132 else
2133 more++;
2134 break;
2135 }
2136 }
2137
2138 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2139 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2140 if (!adapter->tx_scrq)
2141 goto tx_failed;
2142
2143 for (i = 0; i < adapter->req_tx_queues; i++) {
2144 adapter->tx_scrq[i] = allqueues[i];
2145 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2146 }
2147
2148 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2149 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2150 if (!adapter->rx_scrq)
2151 goto rx_failed;
2152
2153 for (i = 0; i < adapter->req_rx_queues; i++) {
2154 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2155 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2156 }
2157
d346b9bc
NF		 2158 kfree(allqueues);
2159 return 0;
2160
2161rx_failed:
2162 kfree(adapter->tx_scrq);
2163 adapter->tx_scrq = NULL;
2164tx_failed:
2165 for (i = 0; i < registered_queues; i++)
2166 release_sub_crq_queue(adapter, allqueues[i]);
2167 kfree(allqueues);
2168 return -1;
2169}
2170
2171static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2172{
2173 struct device *dev = &adapter->vdev->dev;
2174 union ibmvnic_crq crq;
d346b9bc
NF		 2175
2176 if (!retry) {
2177 /* Sub-CRQ entries are 32 byte long */
2178 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2179
2180 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2181 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2182 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2183 return;
2184 }
2185
2186 /* Get the minimum between the queried max and the entries
2187 * that fit in our PAGE_SIZE
2188 */
2189 adapter->req_tx_entries_per_subcrq =
2190 adapter->max_tx_entries_per_subcrq > entries_page ?
2191 entries_page : adapter->max_tx_entries_per_subcrq;
2192 adapter->req_rx_add_entries_per_subcrq =
2193 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2194 entries_page : adapter->max_rx_add_entries_per_subcrq;
2195
2196 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2197 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2198 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2199
2200 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2201 }
2202
032c5e82
TF		 2203 memset(&crq, 0, sizeof(crq));
2204 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2205 crq.request_capability.cmd = REQUEST_CAPABILITY;
2206
2207 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2208 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2209 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2210 ibmvnic_send_crq(adapter, &crq);
2211
2212 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2213 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2214 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2215 ibmvnic_send_crq(adapter, &crq);
2216
2217 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2218 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2219 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2220 ibmvnic_send_crq(adapter, &crq);
2221
2222 crq.request_capability.capability =
2223 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2224 crq.request_capability.number =
de89e854 2225 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2226 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2227 ibmvnic_send_crq(adapter, &crq);
2228
2229 crq.request_capability.capability =
2230 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2231 crq.request_capability.number =
de89e854 2232 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2233 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2234 ibmvnic_send_crq(adapter, &crq);
2235
2236 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2237 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2238 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2239 ibmvnic_send_crq(adapter, &crq);
2240
2241 if (adapter->netdev->flags & IFF_PROMISC) {
2242 if (adapter->promisc_supported) {
2243 crq.request_capability.capability =
2244 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2245 crq.request_capability.number = cpu_to_be64(1);
901e040a 2246 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2247 ibmvnic_send_crq(adapter, &crq);
2248 }
2249 } else {
2250 crq.request_capability.capability =
2251 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2252 crq.request_capability.number = cpu_to_be64(0);
901e040a 2253 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2254 ibmvnic_send_crq(adapter, &crq);
2255 }
032c5e82
TF		 2256}
2257
2258static int pending_scrq(struct ibmvnic_adapter *adapter,
2259 struct ibmvnic_sub_crq_queue *scrq)
2260{
2261 union sub_crq *entry = &scrq->msgs[scrq->cur];
2262
90c8014c
NF		 2263 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2264 adapter->state == VNIC_CLOSING)
032c5e82
TF		 2265 return 1;
2266 else
2267 return 0;
2268}
2269
2270static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2271 struct ibmvnic_sub_crq_queue *scrq)
2272{
2273 union sub_crq *entry;
2274 unsigned long flags;
2275
2276 spin_lock_irqsave(&scrq->lock, flags);
2277 entry = &scrq->msgs[scrq->cur];
2278 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2279 if (++scrq->cur == scrq->size)
2280 scrq->cur = 0;
2281 } else {
2282 entry = NULL;
2283 }
2284 spin_unlock_irqrestore(&scrq->lock, flags);
2285
2286 return entry;
2287}
2288
2289static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2290{
2291 struct ibmvnic_crq_queue *queue = &adapter->crq;
2292 union ibmvnic_crq *crq;
2293
2294 crq = &queue->msgs[queue->cur];
2295 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2296 if (++queue->cur == queue->size)
2297 queue->cur = 0;
2298 } else {
2299 crq = NULL;
2300 }
2301
2302 return crq;
2303}
2304
2305static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2306 union sub_crq *sub_crq)
2307{
2308 unsigned int ua = adapter->vdev->unit_address;
2309 struct device *dev = &adapter->vdev->dev;
2310 u64 *u64_crq = (u64 *)sub_crq;
2311 int rc;
2312
2313 netdev_dbg(adapter->netdev,
2314 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2315 (unsigned long int)cpu_to_be64(remote_handle),
2316 (unsigned long int)cpu_to_be64(u64_crq[0]),
2317 (unsigned long int)cpu_to_be64(u64_crq[1]),
2318 (unsigned long int)cpu_to_be64(u64_crq[2]),
2319 (unsigned long int)cpu_to_be64(u64_crq[3]));
2320
2321 /* Make sure the hypervisor sees the complete request */
2322 mb();
2323
2324 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2325 cpu_to_be64(remote_handle),
2326 cpu_to_be64(u64_crq[0]),
2327 cpu_to_be64(u64_crq[1]),
2328 cpu_to_be64(u64_crq[2]),
2329 cpu_to_be64(u64_crq[3]));
2330
2331 if (rc) {
2332 if (rc == H_CLOSED)
2333 dev_warn(dev, "CRQ Queue closed\n");
2334 dev_err(dev, "Send error (rc=%d)\n", rc);
2335 }
2336
2337 return rc;
2338}
2339
ad7775dc
TF		 2340static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2341 u64 remote_handle, u64 ioba, u64 num_entries)
2342{
2343 unsigned int ua = adapter->vdev->unit_address;
2344 struct device *dev = &adapter->vdev->dev;
2345 int rc;
2346
2347 /* Make sure the hypervisor sees the complete request */
2348 mb();
2349 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2350 cpu_to_be64(remote_handle),
2351 ioba, num_entries);
2352
2353 if (rc) {
2354 if (rc == H_CLOSED)
2355 dev_warn(dev, "CRQ Queue closed\n");
2356 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2357 }
2358
2359 return rc;
2360}
2361
032c5e82
TF		 2362static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2363 union ibmvnic_crq *crq)
2364{
2365 unsigned int ua = adapter->vdev->unit_address;
2366 struct device *dev = &adapter->vdev->dev;
2367 u64 *u64_crq = (u64 *)crq;
2368 int rc;
2369
2370 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2371 (unsigned long int)cpu_to_be64(u64_crq[0]),
2372 (unsigned long int)cpu_to_be64(u64_crq[1]));
2373
2374 /* Make sure the hypervisor sees the complete request */
2375 mb();
2376
2377 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2378 cpu_to_be64(u64_crq[0]),
2379 cpu_to_be64(u64_crq[1]));
2380
2381 if (rc) {
2382 if (rc == H_CLOSED)
2383 dev_warn(dev, "CRQ Queue closed\n");
2384 dev_warn(dev, "Send error (rc=%d)\n", rc);
2385 }
2386
2387 return rc;
2388}
2389
2390static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2391{
2392 union ibmvnic_crq crq;
2393
2394 memset(&crq, 0, sizeof(crq));
2395 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2396 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2397 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2398
2399 return ibmvnic_send_crq(adapter, &crq);
2400}
2401
032c5e82
TF		 2402static int send_version_xchg(struct ibmvnic_adapter *adapter)
2403{
2404 union ibmvnic_crq crq;
2405
2406 memset(&crq, 0, sizeof(crq));
2407 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2408 crq.version_exchange.cmd = VERSION_EXCHANGE;
2409 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2410
2411 return ibmvnic_send_crq(adapter, &crq);
2412}
2413
2414static void send_login(struct ibmvnic_adapter *adapter)
2415{
2416 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2417 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2418 struct device *dev = &adapter->vdev->dev;
2419 dma_addr_t rsp_buffer_token;
2420 dma_addr_t buffer_token;
2421 size_t rsp_buffer_size;
2422 union ibmvnic_crq crq;
032c5e82
TF		 2423 size_t buffer_size;
2424 __be64 *tx_list_p;
2425 __be64 *rx_list_p;
2426 int i;
2427
2428 buffer_size =
2429 sizeof(struct ibmvnic_login_buffer) +
2430 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2431
2432 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2433 if (!login_buffer)
2434 goto buf_alloc_failed;
2435
2436 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2437 DMA_TO_DEVICE);
2438 if (dma_mapping_error(dev, buffer_token)) {
2439 dev_err(dev, "Couldn't map login buffer\n");
2440 goto buf_map_failed;
2441 }
2442
498cd8e4
JA		 2443 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2444 sizeof(u64) * adapter->req_tx_queues +
2445 sizeof(u64) * adapter->req_rx_queues +
2446 sizeof(u64) * adapter->req_rx_queues +
2447 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2448
2449 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2450 if (!login_rsp_buffer)
2451 goto buf_rsp_alloc_failed;
2452
2453 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2454 rsp_buffer_size, DMA_FROM_DEVICE);
2455 if (dma_mapping_error(dev, rsp_buffer_token)) {
2456 dev_err(dev, "Couldn't map login rsp buffer\n");
2457 goto buf_rsp_map_failed;
2458 }
661a2622 2459
032c5e82
TF		 2460 adapter->login_buf = login_buffer;
2461 adapter->login_buf_token = buffer_token;
2462 adapter->login_buf_sz = buffer_size;
2463 adapter->login_rsp_buf = login_rsp_buffer;
2464 adapter->login_rsp_buf_token = rsp_buffer_token;
2465 adapter->login_rsp_buf_sz = rsp_buffer_size;
2466
2467 login_buffer->len = cpu_to_be32(buffer_size);
2468 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2469 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2470 login_buffer->off_txcomp_subcrqs =
2471 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2472 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2473 login_buffer->off_rxcomp_subcrqs =
2474 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2475 sizeof(u64) * adapter->req_tx_queues);
2476 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2477 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2478
2479 tx_list_p = (__be64 *)((char *)login_buffer +
2480 sizeof(struct ibmvnic_login_buffer));
2481 rx_list_p = (__be64 *)((char *)login_buffer +
2482 sizeof(struct ibmvnic_login_buffer) +
2483 sizeof(u64) * adapter->req_tx_queues);
2484
2485 for (i = 0; i < adapter->req_tx_queues; i++) {
2486 if (adapter->tx_scrq[i]) {
2487 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2488 crq_num);
2489 }
2490 }
2491
2492 for (i = 0; i < adapter->req_rx_queues; i++) {
2493 if (adapter->rx_scrq[i]) {
2494 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2495 crq_num);
2496 }
2497 }
2498
2499 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2500 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2501 netdev_dbg(adapter->netdev, "%016lx\n",
2502 ((unsigned long int *)(adapter->login_buf))[i]);
2503 }
2504
2505 memset(&crq, 0, sizeof(crq));
2506 crq.login.first = IBMVNIC_CRQ_CMD;
2507 crq.login.cmd = LOGIN;
2508 crq.login.ioba = cpu_to_be32(buffer_token);
2509 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2510 ibmvnic_send_crq(adapter, &crq);
2511
2512 return;
2513
032c5e82
TF		 2514buf_rsp_map_failed:
2515 kfree(login_rsp_buffer);
2516buf_rsp_alloc_failed:
2517 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2518buf_map_failed:
2519 kfree(login_buffer);
2520buf_alloc_failed:
2521 return;
2522}
2523
2524static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2525 u32 len, u8 map_id)
2526{
2527 union ibmvnic_crq crq;
2528
2529 memset(&crq, 0, sizeof(crq));
2530 crq.request_map.first = IBMVNIC_CRQ_CMD;
2531 crq.request_map.cmd = REQUEST_MAP;
2532 crq.request_map.map_id = map_id;
2533 crq.request_map.ioba = cpu_to_be32(addr);
2534 crq.request_map.len = cpu_to_be32(len);
2535 ibmvnic_send_crq(adapter, &crq);
2536}
2537
2538static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2539{
2540 union ibmvnic_crq crq;
2541
2542 memset(&crq, 0, sizeof(crq));
2543 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2544 crq.request_unmap.cmd = REQUEST_UNMAP;
2545 crq.request_unmap.map_id = map_id;
2546 ibmvnic_send_crq(adapter, &crq);
2547}
2548
2549static void send_map_query(struct ibmvnic_adapter *adapter)
2550{
2551 union ibmvnic_crq crq;
2552
2553 memset(&crq, 0, sizeof(crq));
2554 crq.query_map.first = IBMVNIC_CRQ_CMD;
2555 crq.query_map.cmd = QUERY_MAP;
2556 ibmvnic_send_crq(adapter, &crq);
2557}
2558
2559/* Send a series of CRQs requesting various capabilities of the VNIC server */
2560static void send_cap_queries(struct ibmvnic_adapter *adapter)
2561{
2562 union ibmvnic_crq crq;
2563
901e040a 2564 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2565 memset(&crq, 0, sizeof(crq));
2566 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2567 crq.query_capability.cmd = QUERY_CAPABILITY;
2568
2569 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2570 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2571 ibmvnic_send_crq(adapter, &crq);
2572
2573 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2574 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2575 ibmvnic_send_crq(adapter, &crq);
2576
2577 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2578 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2579 ibmvnic_send_crq(adapter, &crq);
2580
2581 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2582 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2583 ibmvnic_send_crq(adapter, &crq);
2584
2585 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2586 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2587 ibmvnic_send_crq(adapter, &crq);
2588
2589 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2590 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2591 ibmvnic_send_crq(adapter, &crq);
2592
2593 crq.query_capability.capability =
2594 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2595 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2596 ibmvnic_send_crq(adapter, &crq);
2597
2598 crq.query_capability.capability =
2599 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2600 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2601 ibmvnic_send_crq(adapter, &crq);
2602
2603 crq.query_capability.capability =
2604 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2605 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2606 ibmvnic_send_crq(adapter, &crq);
2607
2608 crq.query_capability.capability =
2609 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2610 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2611 ibmvnic_send_crq(adapter, &crq);
2612
2613 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2614 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2615 ibmvnic_send_crq(adapter, &crq);
2616
2617 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2618 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2619 ibmvnic_send_crq(adapter, &crq);
2620
2621 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2622 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2623 ibmvnic_send_crq(adapter, &crq);
2624
2625 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2626 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2627 ibmvnic_send_crq(adapter, &crq);
2628
2629 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2630 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2631 ibmvnic_send_crq(adapter, &crq);
2632
2633 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2634 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2635 ibmvnic_send_crq(adapter, &crq);
2636
6052d5e2
MFV		 2637 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2638 atomic_inc(&adapter->running_cap_crqs);
2639 ibmvnic_send_crq(adapter, &crq);
2640
032c5e82 2641 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2642 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2643 ibmvnic_send_crq(adapter, &crq);
2644
2645 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2646 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2647 ibmvnic_send_crq(adapter, &crq);
2648
2649 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2650 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2651 ibmvnic_send_crq(adapter, &crq);
2652
2653 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2654 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2655 ibmvnic_send_crq(adapter, &crq);
2656
2657 crq.query_capability.capability =
2658 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2659 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2660 ibmvnic_send_crq(adapter, &crq);
2661
2662 crq.query_capability.capability =
2663 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2664 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2665 ibmvnic_send_crq(adapter, &crq);
2666
2667 crq.query_capability.capability =
2668 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2669 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2670 ibmvnic_send_crq(adapter, &crq);
2671
2672 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2673 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2674 ibmvnic_send_crq(adapter, &crq);
2675}
2676
2677static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2678{
2679 struct device *dev = &adapter->vdev->dev;
2680 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2681 union ibmvnic_crq crq;
2682 int i;
2683
2684 dma_unmap_single(dev, adapter->ip_offload_tok,
2685 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2686
2687 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2688 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2689 netdev_dbg(adapter->netdev, "%016lx\n",
2690 ((unsigned long int *)(buf))[i]);
2691
2692 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2693 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2694 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2695 buf->tcp_ipv4_chksum);
2696 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2697 buf->tcp_ipv6_chksum);
2698 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2699 buf->udp_ipv4_chksum);
2700 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2701 buf->udp_ipv6_chksum);
2702 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2703 buf->large_tx_ipv4);
2704 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2705 buf->large_tx_ipv6);
2706 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2707 buf->large_rx_ipv4);
2708 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2709 buf->large_rx_ipv6);
2710 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2711 buf->max_ipv4_header_size);
2712 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2713 buf->max_ipv6_header_size);
2714 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2715 buf->max_tcp_header_size);
2716 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2717 buf->max_udp_header_size);
2718 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2719 buf->max_large_tx_size);
2720 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2721 buf->max_large_rx_size);
2722 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2723 buf->ipv6_extension_header);
2724 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2725 buf->tcp_pseudosum_req);
2726 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2727 buf->num_ipv6_ext_headers);
2728 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2729 buf->off_ipv6_ext_headers);
2730
2731 adapter->ip_offload_ctrl_tok =
2732 dma_map_single(dev, &adapter->ip_offload_ctrl,
2733 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2734
2735 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2736 dev_err(dev, "Couldn't map ip offload control buffer\n");
2737 return;
2738 }
2739
2740 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2741 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2742 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2743 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2744 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2745
2746 /* large_tx/rx disabled for now, additional features needed */
2747 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2748 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2749 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2750 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2751
2752 adapter->netdev->features = NETIF_F_GSO;
2753
2754 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2755 adapter->netdev->features |= NETIF_F_IP_CSUM;
2756
2757 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2758 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2759
9be02cdf
TF		 2760 if ((adapter->netdev->features &
2761 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2762 adapter->netdev->features |= NETIF_F_RXCSUM;
2763
032c5e82
TF		 2764 memset(&crq, 0, sizeof(crq));
2765 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2766 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2767 crq.control_ip_offload.len =
2768 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2769 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2770 ibmvnic_send_crq(adapter, &crq);
2771}
2772
2773static void handle_error_info_rsp(union ibmvnic_crq *crq,
2774 struct ibmvnic_adapter *adapter)
2775{
2776 struct device *dev = &adapter->vdev->dev;
96183182 2777 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2778 unsigned long flags;
2779 bool found = false;
2780 int i;
2781
2782 if (!crq->request_error_rsp.rc.code) {
2783 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2784 crq->request_error_rsp.rc.code);
2785 return;
2786 }
2787
2788 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2789 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2790 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2791 found = true;
2792 list_del(&error_buff->list);
2793 break;
2794 }
2795 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2796
2797 if (!found) {
2798 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2799 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2800 return;
2801 }
2802
2803 dev_err(dev, "Detailed info for error id %x:",
75224c93 2804 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2805
2806 for (i = 0; i < error_buff->len; i++) {
2807 pr_cont("%02x", (int)error_buff->buff[i]);
2808 if (i % 8 == 7)
2809 pr_cont(" ");
2810 }
2811 pr_cont("\n");
2812
2813 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2814 DMA_FROM_DEVICE);
2815 kfree(error_buff->buff);
2816 kfree(error_buff);
2817}
2818
2f9de9ba
NF		 2819static void request_error_information(struct ibmvnic_adapter *adapter,
2820 union ibmvnic_crq *err_crq)
032c5e82 2821{
032c5e82 2822 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2823 struct net_device *netdev = adapter->netdev;
032c5e82 2824 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2825 unsigned long timeout = msecs_to_jiffies(30000);
2826 union ibmvnic_crq crq;
032c5e82 2827 unsigned long flags;
2f9de9ba 2828 int rc, detail_len;
032c5e82
TF		 2829
2830 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2831 if (!error_buff)
2832 return;
2833
2f9de9ba 2834 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2835 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2836 if (!error_buff->buff) {
2837 kfree(error_buff);
2838 return;
2839 }
2840
2841 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2842 DMA_FROM_DEVICE);
2843 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2844 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2845 kfree(error_buff->buff);
2846 kfree(error_buff);
2847 return;
2848 }
2849
032c5e82 2850 error_buff->len = detail_len;
2f9de9ba 2851 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2852
2853 spin_lock_irqsave(&adapter->error_list_lock, flags);
2854 list_add_tail(&error_buff->list, &adapter->errors);
2855 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2856
2f9de9ba
NF		 2857 memset(&crq, 0, sizeof(crq));
2858 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2859 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2860 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2861 crq.request_error_info.len = cpu_to_be32(detail_len);
2862 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2863
2864 rc = ibmvnic_send_crq(adapter, &crq);
2865 if (rc) {
2866 netdev_err(netdev, "failed to request error information\n");
2867 goto err_info_fail;
2868 }
2869
2870 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2871 netdev_err(netdev, "timeout waiting for error information\n");
2872 goto err_info_fail;
2873 }
2874
2875 return;
2876
2877err_info_fail:
2878 spin_lock_irqsave(&adapter->error_list_lock, flags);
2879 list_del(&error_buff->list);
2880 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2881
2882 kfree(error_buff->buff);
2883 kfree(error_buff);
2884}
2885
2886static void handle_error_indication(union ibmvnic_crq *crq,
2887 struct ibmvnic_adapter *adapter)
2888{
2889 struct device *dev = &adapter->vdev->dev;
2890
2891 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2892 crq->error_indication.flags
2893 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2894 be32_to_cpu(crq->error_indication.error_id),
2895 be16_to_cpu(crq->error_indication.error_cause));
2896
2897 if (be32_to_cpu(crq->error_indication.error_id))
2898 request_error_information(adapter, crq);
ed651a10
NF		 2899
2900 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2901 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 2902 else
2903 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 2904}
2905
2906static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2907 struct ibmvnic_adapter *adapter)
2908{
2909 struct net_device *netdev = adapter->netdev;
2910 struct device *dev = &adapter->vdev->dev;
2911 long rc;
2912
2913 rc = crq->change_mac_addr_rsp.rc.code;
2914 if (rc) {
2915 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2916 return;
2917 }
2918 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2919 ETH_ALEN);
2920}
2921
2922static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2923 struct ibmvnic_adapter *adapter)
2924{
2925 struct device *dev = &adapter->vdev->dev;
2926 u64 *req_value;
2927 char *name;
2928
901e040a 2929 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2930 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2931 case REQ_TX_QUEUES:
2932 req_value = &adapter->req_tx_queues;
2933 name = "tx";
2934 break;
2935 case REQ_RX_QUEUES:
2936 req_value = &adapter->req_rx_queues;
2937 name = "rx";
2938 break;
2939 case REQ_RX_ADD_QUEUES:
2940 req_value = &adapter->req_rx_add_queues;
2941 name = "rx_add";
2942 break;
2943 case REQ_TX_ENTRIES_PER_SUBCRQ:
2944 req_value = &adapter->req_tx_entries_per_subcrq;
2945 name = "tx_entries_per_subcrq";
2946 break;
2947 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2948 req_value = &adapter->req_rx_add_entries_per_subcrq;
2949 name = "rx_add_entries_per_subcrq";
2950 break;
2951 case REQ_MTU:
2952 req_value = &adapter->req_mtu;
2953 name = "mtu";
2954 break;
2955 case PROMISC_REQUESTED:
2956 req_value = &adapter->promisc;
2957 name = "promisc";
2958 break;
2959 default:
2960 dev_err(dev, "Got invalid cap request rsp %d\n",
2961 crq->request_capability.capability);
2962 return;
2963 }
2964
2965 switch (crq->request_capability_rsp.rc.code) {
2966 case SUCCESS:
2967 break;
2968 case PARTIALSUCCESS:
2969 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2970 *req_value,
28f4d165 2971 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2972 number), name);
b510888f 2973 release_sub_crqs(adapter);
28f4d165 2974 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 2975 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 2976 return;
2977 default:
2978 dev_err(dev, "Error %d in request cap rsp\n",
2979 crq->request_capability_rsp.rc.code);
2980 return;
2981 }
2982
2983 /* Done receiving requested capabilities, query IP offload support */
901e040a 2984 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2985 union ibmvnic_crq newcrq;
2986 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2987 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2988 &adapter->ip_offload_buf;
2989
249168ad 2990 adapter->wait_capability = false;
032c5e82
TF		 2991 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2992 buf_sz,
2993 DMA_FROM_DEVICE);
2994
2995 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2996 if (!firmware_has_feature(FW_FEATURE_CMO))
2997 dev_err(dev, "Couldn't map offload buffer\n");
2998 return;
2999 }
3000
3001 memset(&newcrq, 0, sizeof(newcrq));
3002 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3003 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3004 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3005 newcrq.query_ip_offload.ioba =
3006 cpu_to_be32(adapter->ip_offload_tok);
3007
3008 ibmvnic_send_crq(adapter, &newcrq);
3009 }
3010}
3011
3012static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3013 struct ibmvnic_adapter *adapter)
3014{
3015 struct device *dev = &adapter->vdev->dev;
3016 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3017 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 3018 int i;
3019
3020 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3021 DMA_BIDIRECTIONAL);
3022 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3023 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3024
498cd8e4
JA		 3025 /* If the number of queues requested can't be allocated by the
3026 * server, the login response will return with code 1. We will need
3027 * to resend the login buffer with fewer queues requested.
3028 */
3029 if (login_rsp_crq->generic.rc.code) {
3030 adapter->renegotiate = true;
3031 complete(&adapter->init_done);
3032 return 0;
3033 }
3034
032c5e82
TF		 3035 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3036 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3037 netdev_dbg(adapter->netdev, "%016lx\n",
3038 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3039 }
3040
3041 /* Sanity checks */
3042 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3043 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3044 adapter->req_rx_add_queues !=
3045 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3046 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3047 ibmvnic_remove(adapter->vdev);
3048 return -EIO;
3049 }
3050 complete(&adapter->init_done);
3051
032c5e82
TF		 3052 return 0;
3053}
3054
3055static void handle_request_map_rsp(union ibmvnic_crq *crq,
3056 struct ibmvnic_adapter *adapter)
3057{
3058 struct device *dev = &adapter->vdev->dev;
3059 u8 map_id = crq->request_map_rsp.map_id;
3060 int tx_subcrqs;
3061 int rx_subcrqs;
3062 long rc;
3063 int i;
3064
3065 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
3066 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3067
3068 rc = crq->request_map_rsp.rc.code;
3069 if (rc) {
3070 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
3071 adapter->map_id--;
3072 /* need to find and zero tx/rx_pool map_id */
3073 for (i = 0; i < tx_subcrqs; i++) {
3074 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
3075 adapter->tx_pool[i].long_term_buff.map_id = 0;
3076 }
3077 for (i = 0; i < rx_subcrqs; i++) {
3078 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
3079 adapter->rx_pool[i].long_term_buff.map_id = 0;
3080 }
3081 }
3082 complete(&adapter->fw_done);
3083}
3084
3085static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3086 struct ibmvnic_adapter *adapter)
3087{
3088 struct device *dev = &adapter->vdev->dev;
3089 long rc;
3090
3091 rc = crq->request_unmap_rsp.rc.code;
3092 if (rc)
3093 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3094}
3095
3096static void handle_query_map_rsp(union ibmvnic_crq *crq,
3097 struct ibmvnic_adapter *adapter)
3098{
3099 struct net_device *netdev = adapter->netdev;
3100 struct device *dev = &adapter->vdev->dev;
3101 long rc;
3102
3103 rc = crq->query_map_rsp.rc.code;
3104 if (rc) {
3105 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3106 return;
3107 }
3108 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3109 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3110 crq->query_map_rsp.free_pages);
3111}
3112
3113static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3114 struct ibmvnic_adapter *adapter)
3115{
3116 struct net_device *netdev = adapter->netdev;
3117 struct device *dev = &adapter->vdev->dev;
3118 long rc;
3119
901e040a 3120 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3121 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3122 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3123 rc = crq->query_capability.rc.code;
3124 if (rc) {
3125 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3126 goto out;
3127 }
3128
3129 switch (be16_to_cpu(crq->query_capability.capability)) {
3130 case MIN_TX_QUEUES:
3131 adapter->min_tx_queues =
de89e854 3132 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3133 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3134 adapter->min_tx_queues);
3135 break;
3136 case MIN_RX_QUEUES:
3137 adapter->min_rx_queues =
de89e854 3138 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3139 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3140 adapter->min_rx_queues);
3141 break;
3142 case MIN_RX_ADD_QUEUES:
3143 adapter->min_rx_add_queues =
de89e854 3144 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3145 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3146 adapter->min_rx_add_queues);
3147 break;
3148 case MAX_TX_QUEUES:
3149 adapter->max_tx_queues =
de89e854 3150 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3151 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3152 adapter->max_tx_queues);
3153 break;
3154 case MAX_RX_QUEUES:
3155 adapter->max_rx_queues =
de89e854 3156 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3157 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3158 adapter->max_rx_queues);
3159 break;
3160 case MAX_RX_ADD_QUEUES:
3161 adapter->max_rx_add_queues =
de89e854 3162 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3163 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3164 adapter->max_rx_add_queues);
3165 break;
3166 case MIN_TX_ENTRIES_PER_SUBCRQ:
3167 adapter->min_tx_entries_per_subcrq =
de89e854 3168 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3169 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3170 adapter->min_tx_entries_per_subcrq);
3171 break;
3172 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3173 adapter->min_rx_add_entries_per_subcrq =
de89e854 3174 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3175 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3176 adapter->min_rx_add_entries_per_subcrq);
3177 break;
3178 case MAX_TX_ENTRIES_PER_SUBCRQ:
3179 adapter->max_tx_entries_per_subcrq =
de89e854 3180 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3181 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3182 adapter->max_tx_entries_per_subcrq);
3183 break;
3184 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3185 adapter->max_rx_add_entries_per_subcrq =
de89e854 3186 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3187 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3188 adapter->max_rx_add_entries_per_subcrq);
3189 break;
3190 case TCP_IP_OFFLOAD:
3191 adapter->tcp_ip_offload =
de89e854 3192 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3193 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3194 adapter->tcp_ip_offload);
3195 break;
3196 case PROMISC_SUPPORTED:
3197 adapter->promisc_supported =
de89e854 3198 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3199 netdev_dbg(netdev, "promisc_supported = %lld\n",
3200 adapter->promisc_supported);
3201 break;
3202 case MIN_MTU:
de89e854 3203 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3204 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3205 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3206 break;
3207 case MAX_MTU:
de89e854 3208 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3209 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3210 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3211 break;
3212 case MAX_MULTICAST_FILTERS:
3213 adapter->max_multicast_filters =
de89e854 3214 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3215 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3216 adapter->max_multicast_filters);
3217 break;
3218 case VLAN_HEADER_INSERTION:
3219 adapter->vlan_header_insertion =
de89e854 3220 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3221 if (adapter->vlan_header_insertion)
3222 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3223 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3224 adapter->vlan_header_insertion);
3225 break;
6052d5e2
MFV		 3226 case RX_VLAN_HEADER_INSERTION:
3227 adapter->rx_vlan_header_insertion =
3228 be64_to_cpu(crq->query_capability.number);
3229 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3230 adapter->rx_vlan_header_insertion);
3231 break;
032c5e82
TF		 3232 case MAX_TX_SG_ENTRIES:
3233 adapter->max_tx_sg_entries =
de89e854 3234 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3235 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3236 adapter->max_tx_sg_entries);
3237 break;
3238 case RX_SG_SUPPORTED:
3239 adapter->rx_sg_supported =
de89e854 3240 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3241 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3242 adapter->rx_sg_supported);
3243 break;
3244 case OPT_TX_COMP_SUB_QUEUES:
3245 adapter->opt_tx_comp_sub_queues =
de89e854 3246 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3247 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3248 adapter->opt_tx_comp_sub_queues);
3249 break;
3250 case OPT_RX_COMP_QUEUES:
3251 adapter->opt_rx_comp_queues =
de89e854 3252 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3253 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3254 adapter->opt_rx_comp_queues);
3255 break;
3256 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3257 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3258 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3259 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3260 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3261 break;
3262 case OPT_TX_ENTRIES_PER_SUBCRQ:
3263 adapter->opt_tx_entries_per_subcrq =
de89e854 3264 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3265 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3266 adapter->opt_tx_entries_per_subcrq);
3267 break;
3268 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3269 adapter->opt_rxba_entries_per_subcrq =
de89e854 3270 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3271 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3272 adapter->opt_rxba_entries_per_subcrq);
3273 break;
3274 case TX_RX_DESC_REQ:
3275 adapter->tx_rx_desc_req = crq->query_capability.number;
3276 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3277 adapter->tx_rx_desc_req);
3278 break;
3279
3280 default:
3281 netdev_err(netdev, "Got invalid cap rsp %d\n",
3282 crq->query_capability.capability);
3283 }
3284
3285out:
249168ad
TF		 3286 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3287 adapter->wait_capability = false;
d346b9bc 3288 ibmvnic_send_req_caps(adapter, 0);
249168ad 3289 }
032c5e82
TF		 3290}
3291
032c5e82
TF		 3292static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3293 struct ibmvnic_adapter *adapter)
3294{
3295 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3296 struct net_device *netdev = adapter->netdev;
3297 struct device *dev = &adapter->vdev->dev;
993a82b0 3298 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3299 long rc;
3300
3301 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3302 (unsigned long int)cpu_to_be64(u64_crq[0]),
3303 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3304 switch (gen_crq->first) {
3305 case IBMVNIC_CRQ_INIT_RSP:
3306 switch (gen_crq->cmd) {
3307 case IBMVNIC_CRQ_INIT:
3308 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3309 adapter->from_passive_init = true;
3310 complete(&adapter->init_done);
032c5e82
TF		 3311 break;
3312 case IBMVNIC_CRQ_INIT_COMPLETE:
3313 dev_info(dev, "Partner initialization complete\n");
3314 send_version_xchg(adapter);
3315 break;
3316 default:
3317 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3318 }
3319 return;
3320 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3321 netif_carrier_off(netdev);
032c5e82 3322 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3323 dev_info(dev, "Migrated, re-enabling adapter\n");
3324 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3325 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3326 dev_info(dev, "Backing device failover detected\n");
ed651a10 3327 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3328 } else {
3329 /* The adapter lost the connection */
3330 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3331 gen_crq->cmd);
ed651a10 3332 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3333 }
3334 return;
3335 case IBMVNIC_CRQ_CMD_RSP:
3336 break;
3337 default:
3338 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3339 gen_crq->first);
3340 return;
3341 }
3342
3343 switch (gen_crq->cmd) {
3344 case VERSION_EXCHANGE_RSP:
3345 rc = crq->version_exchange_rsp.rc.code;
3346 if (rc) {
3347 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3348 break;
3349 }
3350 dev_info(dev, "Partner protocol version is %d\n",
3351 crq->version_exchange_rsp.version);
3352 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3353 ibmvnic_version)
3354 ibmvnic_version =
3355 be16_to_cpu(crq->version_exchange_rsp.version);
3356 send_cap_queries(adapter);
3357 break;
3358 case QUERY_CAPABILITY_RSP:
3359 handle_query_cap_rsp(crq, adapter);
3360 break;
3361 case QUERY_MAP_RSP:
3362 handle_query_map_rsp(crq, adapter);
3363 break;
3364 case REQUEST_MAP_RSP:
3365 handle_request_map_rsp(crq, adapter);
3366 break;
3367 case REQUEST_UNMAP_RSP:
3368 handle_request_unmap_rsp(crq, adapter);
3369 break;
3370 case REQUEST_CAPABILITY_RSP:
3371 handle_request_cap_rsp(crq, adapter);
3372 break;
3373 case LOGIN_RSP:
3374 netdev_dbg(netdev, "Got Login Response\n");
3375 handle_login_rsp(crq, adapter);
3376 break;
3377 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3378 netdev_dbg(netdev,
3379 "Got Logical Link State Response, state: %d rc: %d\n",
3380 crq->logical_link_state_rsp.link_state,
3381 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3382 adapter->logical_link_state =
3383 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3384 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3385 complete(&adapter->init_done);
032c5e82
TF		 3386 break;
3387 case LINK_STATE_INDICATION:
3388 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3389 adapter->phys_link_state =
3390 crq->link_state_indication.phys_link_state;
3391 adapter->logical_link_state =
3392 crq->link_state_indication.logical_link_state;
3393 break;
3394 case CHANGE_MAC_ADDR_RSP:
3395 netdev_dbg(netdev, "Got MAC address change Response\n");
3396 handle_change_mac_rsp(crq, adapter);
3397 break;
3398 case ERROR_INDICATION:
3399 netdev_dbg(netdev, "Got Error Indication\n");
3400 handle_error_indication(crq, adapter);
3401 break;
3402 case REQUEST_ERROR_RSP:
3403 netdev_dbg(netdev, "Got Error Detail Response\n");
3404 handle_error_info_rsp(crq, adapter);
3405 break;
3406 case REQUEST_STATISTICS_RSP:
3407 netdev_dbg(netdev, "Got Statistics Response\n");
3408 complete(&adapter->stats_done);
3409 break;
032c5e82
TF		 3410 case QUERY_IP_OFFLOAD_RSP:
3411 netdev_dbg(netdev, "Got Query IP offload Response\n");
3412 handle_query_ip_offload_rsp(adapter);
3413 break;
3414 case MULTICAST_CTRL_RSP:
3415 netdev_dbg(netdev, "Got multicast control Response\n");
3416 break;
3417 case CONTROL_IP_OFFLOAD_RSP:
3418 netdev_dbg(netdev, "Got Control IP offload Response\n");
3419 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3420 sizeof(adapter->ip_offload_ctrl),
3421 DMA_TO_DEVICE);
bd0b6723 3422 complete(&adapter->init_done);
032c5e82 3423 break;
032c5e82
TF		 3424 case COLLECT_FW_TRACE_RSP:
3425 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3426 complete(&adapter->fw_done);
3427 break;
3428 default:
3429 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3430 gen_crq->cmd);
3431 }
3432}
3433
3434static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3435{
3436 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3437
6c267b3d 3438 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3439 return IRQ_HANDLED;
3440}
3441
3442static void ibmvnic_tasklet(void *data)
3443{
3444 struct ibmvnic_adapter *adapter = data;
032c5e82 3445 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3446 union ibmvnic_crq *crq;
3447 unsigned long flags;
3448 bool done = false;
3449
3450 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3451 while (!done) {
3452 /* Pull all the valid messages off the CRQ */
3453 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3454 ibmvnic_handle_crq(crq, adapter);
3455 crq->generic.first = 0;
3456 }
ed7ecbf7
BK		 3457
3458 /* remain in tasklet until all
3459 * capabilities responses are received
3460 */
3461 if (!adapter->wait_capability)
3462 done = true;
032c5e82 3463 }
249168ad
TF		 3464 /* if capabilities CRQ's were sent in this tasklet, the following
3465 * tasklet must wait until all responses are received
3466 */
3467 if (atomic_read(&adapter->running_cap_crqs) != 0)
3468 adapter->wait_capability = true;
032c5e82 3469 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3470}
3471
3472static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3473{
3474 struct vio_dev *vdev = adapter->vdev;
3475 int rc;
3476
3477 do {
3478 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3479 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3480
3481 if (rc)
3482 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3483
3484 return rc;
3485}
3486
3487static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3488{
3489 struct ibmvnic_crq_queue *crq = &adapter->crq;
3490 struct device *dev = &adapter->vdev->dev;
3491 struct vio_dev *vdev = adapter->vdev;
3492 int rc;
3493
3494 /* Close the CRQ */
3495 do {
3496 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3497 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3498
3499 /* Clean out the queue */
3500 memset(crq->msgs, 0, PAGE_SIZE);
3501 crq->cur = 0;
3502
3503 /* And re-open it again */
3504 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3505 crq->msg_token, PAGE_SIZE);
3506
3507 if (rc == H_CLOSED)
3508 /* Adapter is good, but other end is not ready */
3509 dev_warn(dev, "Partner adapter not ready\n");
3510 else if (rc != 0)
3511 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3512
3513 return rc;
3514}
3515
f992887c 3516static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3517{
3518 struct ibmvnic_crq_queue *crq = &adapter->crq;
3519 struct vio_dev *vdev = adapter->vdev;
3520 long rc;
3521
f992887c
NF		 3522 if (!crq->msgs)
3523 return;
3524
032c5e82
TF		 3525 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3526 free_irq(vdev->irq, adapter);
6c267b3d 3527 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3528 do {
3529 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3530 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3531
3532 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3533 DMA_BIDIRECTIONAL);
3534 free_page((unsigned long)crq->msgs);
f992887c 3535 crq->msgs = NULL;
032c5e82
TF		 3536}
3537
f992887c 3538static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3539{
3540 struct ibmvnic_crq_queue *crq = &adapter->crq;
3541 struct device *dev = &adapter->vdev->dev;
3542 struct vio_dev *vdev = adapter->vdev;
3543 int rc, retrc = -ENOMEM;
3544
f992887c
NF		 3545 if (crq->msgs)
3546 return 0;
3547
032c5e82
TF		 3548 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3549 /* Should we allocate more than one page? */
3550
3551 if (!crq->msgs)
3552 return -ENOMEM;
3553
3554 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3555 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3556 DMA_BIDIRECTIONAL);
3557 if (dma_mapping_error(dev, crq->msg_token))
3558 goto map_failed;
3559
3560 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3561 crq->msg_token, PAGE_SIZE);
3562
3563 if (rc == H_RESOURCE)
3564 /* maybe kexecing and resource is busy. try a reset */
3565 rc = ibmvnic_reset_crq(adapter);
3566 retrc = rc;
3567
3568 if (rc == H_CLOSED) {
3569 dev_warn(dev, "Partner adapter not ready\n");
3570 } else if (rc) {
3571 dev_warn(dev, "Error %d opening adapter\n", rc);
3572 goto reg_crq_failed;
3573 }
3574
3575 retrc = 0;
3576
6c267b3d
TF		 3577 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3578 (unsigned long)adapter);
3579
032c5e82
TF		 3580 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3581 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3582 adapter);
3583 if (rc) {
3584 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3585 vdev->irq, rc);
3586 goto req_irq_failed;
3587 }
3588
3589 rc = vio_enable_interrupts(vdev);
3590 if (rc) {
3591 dev_err(dev, "Error %d enabling interrupts\n", rc);
3592 goto req_irq_failed;
3593 }
3594
3595 crq->cur = 0;
3596 spin_lock_init(&crq->lock);
3597
3598 return retrc;
3599
3600req_irq_failed:
6c267b3d 3601 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3602 do {
3603 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3604 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3605reg_crq_failed:
3606 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3607map_failed:
3608 free_page((unsigned long)crq->msgs);
f992887c 3609 crq->msgs = NULL;
032c5e82
TF		 3610 return retrc;
3611}
3612
f6ef6408 3613static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3614{
f6ef6408 3615 struct device *dev = &adapter->vdev->dev;
ea22d51a 3616 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3617 int rc;
3618
28cde751
NF		 3619 if (adapter->resetting) {
3620 rc = ibmvnic_reset_crq(adapter);
3621 if (!rc)
3622 rc = vio_enable_interrupts(adapter->vdev);
3623 } else {
3624 rc = init_crq_queue(adapter);
3625 }
3626
f6ef6408
JA		 3627 if (rc) {
3628 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3629 return rc;
3630 }
3631
017892c1
JA		 3632 adapter->from_passive_init = false;
3633
f6ef6408
JA		 3634 init_completion(&adapter->init_done);
3635 ibmvnic_send_crq_init(adapter);
3636 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3637 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 3638 return -1;
3639 }
3640
3641 if (adapter->from_passive_init) {
3642 adapter->state = VNIC_OPEN;
3643 adapter->from_passive_init = false;
f6ef6408
JA		 3644 return -1;
3645 }
3646
57a49436
NF		 3647 if (adapter->resetting)
3648 rc = reset_sub_crq_queues(adapter);
3649 else
3650 rc = init_sub_crqs(adapter);
1bb3c739
NF		 3651 if (rc) {
3652 dev_err(dev, "Initialization of sub crqs failed\n");
3653 release_crq_queue(adapter);
3654 }
3655
3656 return rc;
f6ef6408
JA		 3657}
3658
3659static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3660{
032c5e82
TF		 3661 struct ibmvnic_adapter *adapter;
3662 struct net_device *netdev;
3663 unsigned char *mac_addr_p;
032c5e82
TF		 3664 int rc;
3665
3666 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3667 dev->unit_address);
3668
3669 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3670 VETH_MAC_ADDR, NULL);
3671 if (!mac_addr_p) {
3672 dev_err(&dev->dev,
3673 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3674 __FILE__, __LINE__);
3675 return 0;
3676 }
3677
3678 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3679 IBMVNIC_MAX_TX_QUEUES);
3680 if (!netdev)
3681 return -ENOMEM;
3682
3683 adapter = netdev_priv(netdev);
90c8014c 3684 adapter->state = VNIC_PROBING;
032c5e82
TF		 3685 dev_set_drvdata(&dev->dev, netdev);
3686 adapter->vdev = dev;
3687 adapter->netdev = netdev;
3688
3689 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3690 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3691 netdev->irq = dev->irq;
3692 netdev->netdev_ops = &ibmvnic_netdev_ops;
3693 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3694 SET_NETDEV_DEV(netdev, &dev->dev);
3695
3696 spin_lock_init(&adapter->stats_lock);
3697
032c5e82 3698 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3699 spin_lock_init(&adapter->error_list_lock);
032c5e82 3700
ed651a10
NF		 3701 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3702 INIT_LIST_HEAD(&adapter->rwi_list);
3703 mutex_init(&adapter->reset_lock);
3704 mutex_init(&adapter->rwi_lock);
3705 adapter->resetting = false;
3706
f6ef6408
JA		 3707 rc = ibmvnic_init(adapter);
3708 if (rc) {
3709 free_netdev(netdev);
3710 return rc;
032c5e82 3711 }
032c5e82 3712
f39f0d1e 3713 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82
TF		 3714
3715 rc = register_netdev(netdev);
3716 if (rc) {
3717 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3718 free_netdev(netdev);
3719 return rc;
032c5e82
TF		 3720 }
3721 dev_info(&dev->dev, "ibmvnic registered\n");
3722
90c8014c 3723 adapter->state = VNIC_PROBED;
032c5e82 3724 return 0;
032c5e82
TF		 3725}
3726
3727static int ibmvnic_remove(struct vio_dev *dev)
3728{
3729 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3730 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3731
90c8014c 3732 adapter->state = VNIC_REMOVING;
032c5e82 3733 unregister_netdev(netdev);
ed651a10 3734 mutex_lock(&adapter->reset_lock);
37489055
NF		 3735
3736 release_resources(adapter);
3737 release_sub_crqs(adapter);
3738 release_crq_queue(adapter);
3739
90c8014c
NF		 3740 adapter->state = VNIC_REMOVED;
3741
ed651a10 3742 mutex_unlock(&adapter->reset_lock);
032c5e82
TF		 3743 free_netdev(netdev);
3744 dev_set_drvdata(&dev->dev, NULL);
3745
3746 return 0;
3747}
3748
3749static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3750{
3751 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3752 struct ibmvnic_adapter *adapter;
3753 struct iommu_table *tbl;
3754 unsigned long ret = 0;
3755 int i;
3756
3757 tbl = get_iommu_table_base(&vdev->dev);
3758
3759 /* netdev inits at probe time along with the structures we need below*/
3760 if (!netdev)
3761 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3762
3763 adapter = netdev_priv(netdev);
3764
3765 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3766 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3767
3768 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3769 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3770
3771 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3772 i++)
3773 ret += adapter->rx_pool[i].size *
3774 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3775
3776 return ret;
3777}
3778
3779static int ibmvnic_resume(struct device *dev)
3780{
3781 struct net_device *netdev = dev_get_drvdata(dev);
3782 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3783 int i;
3784
3785 /* kick the interrupt handlers just in case we lost an interrupt */
3786 for (i = 0; i < adapter->req_rx_queues; i++)
3787 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3788 adapter->rx_scrq[i]);
3789
3790 return 0;
3791}
3792
3793static struct vio_device_id ibmvnic_device_table[] = {
3794 {"network", "IBM,vnic"},
3795 {"", "" }
3796};
3797MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3798
3799static const struct dev_pm_ops ibmvnic_pm_ops = {
3800 .resume = ibmvnic_resume
3801};
3802
3803static struct vio_driver ibmvnic_driver = {
3804 .id_table = ibmvnic_device_table,
3805 .probe = ibmvnic_probe,
3806 .remove = ibmvnic_remove,
3807 .get_desired_dma = ibmvnic_get_desired_dma,
3808 .name = ibmvnic_driver_name,
3809 .pm = &ibmvnic_pm_ops,
3810};
3811
3812/* module functions */
3813static int __init ibmvnic_module_init(void)
3814{
3815 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3816 IBMVNIC_DRIVER_VERSION);
3817
3818 return vio_register_driver(&ibmvnic_driver);
3819}
3820
3821static void __exit ibmvnic_module_exit(void)
3822{
3823 vio_unregister_driver(&ibmvnic_driver);
3824}
3825
3826module_init(ibmvnic_module_init);
3827module_exit(ibmvnic_module_exit);
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