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[linux-2.6-block.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
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>
37798d02 78#include <linux/utsname.h>
032c5e82
TF		 79
80#include "ibmvnic.h"
81
82static const char ibmvnic_driver_name[] = "ibmvnic";
83static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
84
78b07ac1 85MODULE_AUTHOR("Santiago Leon");
032c5e82
TF		 86MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
87MODULE_LICENSE("GPL");
88MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
89
90static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
91static int ibmvnic_remove(struct vio_dev *);
92static void release_sub_crqs(struct ibmvnic_adapter *);
93static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
94static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
95static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
96static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
97static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
98 union sub_crq *sub_crq);
ad7775dc 99static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 100static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
101static int enable_scrq_irq(struct ibmvnic_adapter *,
102 struct ibmvnic_sub_crq_queue *);
103static int disable_scrq_irq(struct ibmvnic_adapter *,
104 struct ibmvnic_sub_crq_queue *);
105static int pending_scrq(struct ibmvnic_adapter *,
106 struct ibmvnic_sub_crq_queue *);
107static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
108 struct ibmvnic_sub_crq_queue *);
109static int ibmvnic_poll(struct napi_struct *napi, int data);
110static void send_map_query(struct ibmvnic_adapter *adapter);
111static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
112static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 113static void send_login(struct ibmvnic_adapter *adapter);
114static void send_cap_queries(struct ibmvnic_adapter *adapter);
4d96f12a 115static int init_sub_crqs(struct ibmvnic_adapter *);
bd0b6723 116static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 117static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 118static void release_crq_queue(struct ibmvnic_adapter *);
c26eba03 119static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
032c5e82
TF		 120
121struct ibmvnic_stat {
122 char name[ETH_GSTRING_LEN];
123 int offset;
124};
125
126#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
127 offsetof(struct ibmvnic_statistics, stat))
128#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
129
130static const struct ibmvnic_stat ibmvnic_stats[] = {
131 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
132 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
133 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
134 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
135 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
136 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
137 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
138 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
139 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
140 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
141 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
142 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
143 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
144 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
145 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
146 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
147 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
148 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
149 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
150 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
151 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
152 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
153};
154
155static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
156 unsigned long length, unsigned long *number,
157 unsigned long *irq)
158{
159 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
160 long rc;
161
162 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
163 *number = retbuf[0];
164 *irq = retbuf[1];
165
166 return rc;
167}
168
032c5e82
TF		 169static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
170 struct ibmvnic_long_term_buff *ltb, int size)
171{
172 struct device *dev = &adapter->vdev->dev;
173
174 ltb->size = size;
175 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
176 GFP_KERNEL);
177
178 if (!ltb->buff) {
179 dev_err(dev, "Couldn't alloc long term buffer\n");
180 return -ENOMEM;
181 }
182 ltb->map_id = adapter->map_id;
183 adapter->map_id++;
db5d0b59
NF		 184
185 init_completion(&adapter->fw_done);
032c5e82
TF		 186 send_request_map(adapter, ltb->addr,
187 ltb->size, ltb->map_id);
032c5e82 188 wait_for_completion(&adapter->fw_done);
f3be0cbc
TF		 189
190 if (adapter->fw_done_rc) {
191 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
192 adapter->fw_done_rc);
193 return -1;
194 }
032c5e82
TF		 195 return 0;
196}
197
198static void free_long_term_buff(struct ibmvnic_adapter *adapter,
199 struct ibmvnic_long_term_buff *ltb)
200{
201 struct device *dev = &adapter->vdev->dev;
202
c657e32c
NF		 203 if (!ltb->buff)
204 return;
205
ed651a10
NF		 206 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
207 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 208 send_request_unmap(adapter, ltb->map_id);
59af56c2 209 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 210}
211
f3be0cbc
TF		 212static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
213 struct ibmvnic_long_term_buff *ltb)
214{
215 memset(ltb->buff, 0, ltb->size);
216
217 init_completion(&adapter->fw_done);
218 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
219 wait_for_completion(&adapter->fw_done);
220
221 if (adapter->fw_done_rc) {
222 dev_info(&adapter->vdev->dev,
223 "Reset failed, attempting to free and reallocate buffer\n");
224 free_long_term_buff(adapter, ltb);
225 return alloc_long_term_buff(adapter, ltb, ltb->size);
226 }
227 return 0;
228}
229
f185a49a
TF		 230static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
231{
232 int i;
233
234 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
235 i++)
236 adapter->rx_pool[i].active = 0;
237}
238
032c5e82
TF		 239static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
240 struct ibmvnic_rx_pool *pool)
241{
242 int count = pool->size - atomic_read(&pool->available);
243 struct device *dev = &adapter->vdev->dev;
244 int buffers_added = 0;
245 unsigned long lpar_rc;
246 union sub_crq sub_crq;
247 struct sk_buff *skb;
248 unsigned int offset;
249 dma_addr_t dma_addr;
250 unsigned char *dst;
251 u64 *handle_array;
252 int shift = 0;
253 int index;
254 int i;
255
f185a49a
TF		 256 if (!pool->active)
257 return;
258
032c5e82
TF		 259 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
260 be32_to_cpu(adapter->login_rsp_buf->
261 off_rxadd_subcrqs));
262
263 for (i = 0; i < count; ++i) {
264 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
265 if (!skb) {
266 dev_err(dev, "Couldn't replenish rx buff\n");
267 adapter->replenish_no_mem++;
268 break;
269 }
270
271 index = pool->free_map[pool->next_free];
272
273 if (pool->rx_buff[index].skb)
274 dev_err(dev, "Inconsistent free_map!\n");
275
276 /* Copy the skb to the long term mapped DMA buffer */
277 offset = index * pool->buff_size;
278 dst = pool->long_term_buff.buff + offset;
279 memset(dst, 0, pool->buff_size);
280 dma_addr = pool->long_term_buff.addr + offset;
281 pool->rx_buff[index].data = dst;
282
283 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
284 pool->rx_buff[index].dma = dma_addr;
285 pool->rx_buff[index].skb = skb;
286 pool->rx_buff[index].pool_index = pool->index;
287 pool->rx_buff[index].size = pool->buff_size;
288
289 memset(&sub_crq, 0, sizeof(sub_crq));
290 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
291 sub_crq.rx_add.correlator =
292 cpu_to_be64((u64)&pool->rx_buff[index]);
293 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
294 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
295
296 /* The length field of the sCRQ is defined to be 24 bits so the
297 * buffer size needs to be left shifted by a byte before it is
298 * converted to big endian to prevent the last byte from being
299 * truncated.
300 */
301#ifdef __LITTLE_ENDIAN__
302 shift = 8;
303#endif
304 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
305
306 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
307 &sub_crq);
308 if (lpar_rc != H_SUCCESS)
309 goto failure;
310
311 buffers_added++;
312 adapter->replenish_add_buff_success++;
313 pool->next_free = (pool->next_free + 1) % pool->size;
314 }
315 atomic_add(buffers_added, &pool->available);
316 return;
317
318failure:
319 dev_info(dev, "replenish pools failure\n");
320 pool->free_map[pool->next_free] = index;
321 pool->rx_buff[index].skb = NULL;
322 if (!dma_mapping_error(dev, dma_addr))
323 dma_unmap_single(dev, dma_addr, pool->buff_size,
324 DMA_FROM_DEVICE);
325
326 dev_kfree_skb_any(skb);
327 adapter->replenish_add_buff_failure++;
328 atomic_add(buffers_added, &pool->available);
f185a49a
TF		 329
330 if (lpar_rc == H_CLOSED) {
331 /* Disable buffer pool replenishment and report carrier off if
332 * queue is closed. Firmware guarantees that a signal will
333 * be sent to the driver, triggering a reset.
334 */
335 deactivate_rx_pools(adapter);
336 netif_carrier_off(adapter->netdev);
337 }
032c5e82
TF		 338}
339
340static void replenish_pools(struct ibmvnic_adapter *adapter)
341{
342 int i;
343
032c5e82
TF		 344 adapter->replenish_task_cycles++;
345 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
346 i++) {
347 if (adapter->rx_pool[i].active)
348 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
349 }
350}
351
3d52b594
JA		 352static void release_stats_buffers(struct ibmvnic_adapter *adapter)
353{
354 kfree(adapter->tx_stats_buffers);
355 kfree(adapter->rx_stats_buffers);
356}
357
358static int init_stats_buffers(struct ibmvnic_adapter *adapter)
359{
360 adapter->tx_stats_buffers =
361 kcalloc(adapter->req_tx_queues,
362 sizeof(struct ibmvnic_tx_queue_stats),
363 GFP_KERNEL);
364 if (!adapter->tx_stats_buffers)
365 return -ENOMEM;
366
367 adapter->rx_stats_buffers =
368 kcalloc(adapter->req_rx_queues,
369 sizeof(struct ibmvnic_rx_queue_stats),
370 GFP_KERNEL);
371 if (!adapter->rx_stats_buffers)
372 return -ENOMEM;
373
374 return 0;
375}
376
7bbc27a4
NF		 377static void release_stats_token(struct ibmvnic_adapter *adapter)
378{
379 struct device *dev = &adapter->vdev->dev;
380
381 if (!adapter->stats_token)
382 return;
383
384 dma_unmap_single(dev, adapter->stats_token,
385 sizeof(struct ibmvnic_statistics),
386 DMA_FROM_DEVICE);
387 adapter->stats_token = 0;
388}
389
390static int init_stats_token(struct ibmvnic_adapter *adapter)
391{
392 struct device *dev = &adapter->vdev->dev;
393 dma_addr_t stok;
394
395 stok = dma_map_single(dev, &adapter->stats,
396 sizeof(struct ibmvnic_statistics),
397 DMA_FROM_DEVICE);
398 if (dma_mapping_error(dev, stok)) {
399 dev_err(dev, "Couldn't map stats buffer\n");
400 return -1;
401 }
402
403 adapter->stats_token = stok;
d1cf33d9 404 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
7bbc27a4
NF		 405 return 0;
406}
407
8c0543ad
NF		 408static int reset_rx_pools(struct ibmvnic_adapter *adapter)
409{
410 struct ibmvnic_rx_pool *rx_pool;
411 int rx_scrqs;
f3be0cbc 412 int i, j, rc;
8c0543ad
NF		 413
414 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
415 for (i = 0; i < rx_scrqs; i++) {
416 rx_pool = &adapter->rx_pool[i];
417
d1cf33d9
NF		 418 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
419
f3be0cbc
TF		 420 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
421 if (rc)
422 return rc;
8c0543ad
NF		 423
424 for (j = 0; j < rx_pool->size; j++)
425 rx_pool->free_map[j] = j;
426
427 memset(rx_pool->rx_buff, 0,
428 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
429
430 atomic_set(&rx_pool->available, 0);
431 rx_pool->next_alloc = 0;
432 rx_pool->next_free = 0;
c3e53b9a 433 rx_pool->active = 1;
8c0543ad
NF		 434 }
435
436 return 0;
437}
438
0ffe2cb7 439static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 440{
0ffe2cb7
NF		 441 struct ibmvnic_rx_pool *rx_pool;
442 int rx_scrqs;
443 int i, j;
032c5e82 444
0ffe2cb7 445 if (!adapter->rx_pool)
032c5e82
TF		 446 return;
447
0ffe2cb7
NF		 448 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
449 for (i = 0; i < rx_scrqs; i++) {
450 rx_pool = &adapter->rx_pool[i];
451
d1cf33d9
NF		 452 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
453
0ffe2cb7
NF		 454 kfree(rx_pool->free_map);
455 free_long_term_buff(adapter, &rx_pool->long_term_buff);
456
457 if (!rx_pool->rx_buff)
e0ebe942 458 continue;
0ffe2cb7
NF		 459
460 for (j = 0; j < rx_pool->size; j++) {
461 if (rx_pool->rx_buff[j].skb) {
462 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
463 rx_pool->rx_buff[i].skb = NULL;
464 }
465 }
466
467 kfree(rx_pool->rx_buff);
468 }
469
470 kfree(adapter->rx_pool);
471 adapter->rx_pool = NULL;
472}
473
474static int init_rx_pools(struct net_device *netdev)
475{
476 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
477 struct device *dev = &adapter->vdev->dev;
478 struct ibmvnic_rx_pool *rx_pool;
479 int rxadd_subcrqs;
480 u64 *size_array;
481 int i, j;
482
483 rxadd_subcrqs =
484 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
485 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
486 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
487
488 adapter->rx_pool = kcalloc(rxadd_subcrqs,
489 sizeof(struct ibmvnic_rx_pool),
490 GFP_KERNEL);
491 if (!adapter->rx_pool) {
492 dev_err(dev, "Failed to allocate rx pools\n");
493 return -1;
494 }
495
496 for (i = 0; i < rxadd_subcrqs; i++) {
497 rx_pool = &adapter->rx_pool[i];
498
499 netdev_dbg(adapter->netdev,
d1cf33d9 500 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
0ffe2cb7
NF		 501 i, adapter->req_rx_add_entries_per_subcrq,
502 be64_to_cpu(size_array[i]));
503
504 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
505 rx_pool->index = i;
506 rx_pool->buff_size = be64_to_cpu(size_array[i]);
507 rx_pool->active = 1;
508
509 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
510 GFP_KERNEL);
511 if (!rx_pool->free_map) {
512 release_rx_pools(adapter);
513 return -1;
032c5e82 514 }
0ffe2cb7
NF		 515
516 rx_pool->rx_buff = kcalloc(rx_pool->size,
517 sizeof(struct ibmvnic_rx_buff),
518 GFP_KERNEL);
519 if (!rx_pool->rx_buff) {
520 dev_err(dev, "Couldn't alloc rx buffers\n");
521 release_rx_pools(adapter);
522 return -1;
523 }
524
525 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
526 rx_pool->size * rx_pool->buff_size)) {
527 release_rx_pools(adapter);
528 return -1;
529 }
530
531 for (j = 0; j < rx_pool->size; ++j)
532 rx_pool->free_map[j] = j;
533
534 atomic_set(&rx_pool->available, 0);
535 rx_pool->next_alloc = 0;
536 rx_pool->next_free = 0;
032c5e82 537 }
0ffe2cb7
NF		 538
539 return 0;
032c5e82
TF		 540}
541
8c0543ad
NF		 542static int reset_tx_pools(struct ibmvnic_adapter *adapter)
543{
544 struct ibmvnic_tx_pool *tx_pool;
545 int tx_scrqs;
f3be0cbc 546 int i, j, rc;
8c0543ad
NF		 547
548 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
549 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9
NF		 550 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
551
8c0543ad
NF		 552 tx_pool = &adapter->tx_pool[i];
553
f3be0cbc
TF		 554 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
555 if (rc)
556 return rc;
8c0543ad 557
fdb06105
TF		 558 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
559 if (rc)
560 return rc;
561
8c0543ad
NF		 562 memset(tx_pool->tx_buff, 0,
563 adapter->req_tx_entries_per_subcrq *
564 sizeof(struct ibmvnic_tx_buff));
565
566 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
567 tx_pool->free_map[j] = j;
568
569 tx_pool->consumer_index = 0;
570 tx_pool->producer_index = 0;
fdb06105 571 tx_pool->tso_index = 0;
8c0543ad
NF		 572 }
573
574 return 0;
575}
576
4e6759be
DANR		 577static void release_vpd_data(struct ibmvnic_adapter *adapter)
578{
579 if (!adapter->vpd)
580 return;
581
582 kfree(adapter->vpd->buff);
583 kfree(adapter->vpd);
584}
585
c657e32c
NF		 586static void release_tx_pools(struct ibmvnic_adapter *adapter)
587{
588 struct ibmvnic_tx_pool *tx_pool;
589 int i, tx_scrqs;
590
591 if (!adapter->tx_pool)
592 return;
593
594 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
595 for (i = 0; i < tx_scrqs; i++) {
d1cf33d9 596 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
c657e32c
NF		 597 tx_pool = &adapter->tx_pool[i];
598 kfree(tx_pool->tx_buff);
599 free_long_term_buff(adapter, &tx_pool->long_term_buff);
fdb06105 600 free_long_term_buff(adapter, &tx_pool->tso_ltb);
c657e32c
NF		 601 kfree(tx_pool->free_map);
602 }
603
604 kfree(adapter->tx_pool);
605 adapter->tx_pool = NULL;
606}
607
608static int init_tx_pools(struct net_device *netdev)
609{
610 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
611 struct device *dev = &adapter->vdev->dev;
612 struct ibmvnic_tx_pool *tx_pool;
613 int tx_subcrqs;
614 int i, j;
615
616 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
617 adapter->tx_pool = kcalloc(tx_subcrqs,
618 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
619 if (!adapter->tx_pool)
620 return -1;
621
622 for (i = 0; i < tx_subcrqs; i++) {
623 tx_pool = &adapter->tx_pool[i];
d1cf33d9
NF		 624
625 netdev_dbg(adapter->netdev,
626 "Initializing tx_pool[%d], %lld buffs\n",
627 i, adapter->req_tx_entries_per_subcrq);
628
c657e32c
NF		 629 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
630 sizeof(struct ibmvnic_tx_buff),
631 GFP_KERNEL);
632 if (!tx_pool->tx_buff) {
633 dev_err(dev, "tx pool buffer allocation failed\n");
634 release_tx_pools(adapter);
635 return -1;
636 }
637
638 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
639 adapter->req_tx_entries_per_subcrq *
640 adapter->req_mtu)) {
641 release_tx_pools(adapter);
642 return -1;
643 }
644
fdb06105
TF		 645 /* alloc TSO ltb */
646 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
647 IBMVNIC_TSO_BUFS *
648 IBMVNIC_TSO_BUF_SZ)) {
649 release_tx_pools(adapter);
650 return -1;
651 }
652
653 tx_pool->tso_index = 0;
654
c657e32c
NF		 655 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
656 sizeof(int), GFP_KERNEL);
657 if (!tx_pool->free_map) {
658 release_tx_pools(adapter);
659 return -1;
660 }
661
662 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
663 tx_pool->free_map[j] = j;
664
665 tx_pool->consumer_index = 0;
666 tx_pool->producer_index = 0;
667 }
668
669 return 0;
670}
671
661a2622
NF		 672static void release_error_buffers(struct ibmvnic_adapter *adapter)
673{
674 struct device *dev = &adapter->vdev->dev;
675 struct ibmvnic_error_buff *error_buff, *tmp;
676 unsigned long flags;
677
678 spin_lock_irqsave(&adapter->error_list_lock, flags);
679 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
680 list_del(&error_buff->list);
681 dma_unmap_single(dev, error_buff->dma, error_buff->len,
682 DMA_FROM_DEVICE);
683 kfree(error_buff->buff);
684 kfree(error_buff);
685 }
686 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
687}
688
d944c3d6
JA		 689static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
690{
691 int i;
692
693 if (adapter->napi_enabled)
694 return;
695
696 for (i = 0; i < adapter->req_rx_queues; i++)
697 napi_enable(&adapter->napi[i]);
698
699 adapter->napi_enabled = true;
700}
701
702static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
703{
704 int i;
705
706 if (!adapter->napi_enabled)
707 return;
708
d1cf33d9
NF		 709 for (i = 0; i < adapter->req_rx_queues; i++) {
710 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
d944c3d6 711 napi_disable(&adapter->napi[i]);
d1cf33d9 712 }
d944c3d6
JA		 713
714 adapter->napi_enabled = false;
715}
716
a57a5d25 717static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 718{
719 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 720 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 721 struct device *dev = &adapter->vdev->dev;
4d96f12a 722 int rc;
032c5e82 723
bd0b6723
JA		 724 do {
725 if (adapter->renegotiate) {
726 adapter->renegotiate = false;
b510888f 727 release_sub_crqs(adapter);
bd0b6723
JA		 728
729 reinit_completion(&adapter->init_done);
730 send_cap_queries(adapter);
731 if (!wait_for_completion_timeout(&adapter->init_done,
732 timeout)) {
733 dev_err(dev, "Capabilities query timeout\n");
734 return -1;
735 }
4d96f12a
TF		 736 rc = init_sub_crqs(adapter);
737 if (rc) {
738 dev_err(dev,
739 "Initialization of SCRQ's failed\n");
740 return -1;
741 }
742 rc = init_sub_crq_irqs(adapter);
743 if (rc) {
744 dev_err(dev,
745 "Initialization of SCRQ's irqs failed\n");
746 return -1;
747 }
bd0b6723
JA		 748 }
749
750 reinit_completion(&adapter->init_done);
751 send_login(adapter);
752 if (!wait_for_completion_timeout(&adapter->init_done,
753 timeout)) {
754 dev_err(dev, "Login timeout\n");
755 return -1;
756 }
757 } while (adapter->renegotiate);
758
a57a5d25
JA		 759 return 0;
760}
761
1b8955ee
NF		 762static void release_resources(struct ibmvnic_adapter *adapter)
763{
c7bac00b
NF		 764 int i;
765
4e6759be
DANR		 766 release_vpd_data(adapter);
767
1b8955ee
NF		 768 release_tx_pools(adapter);
769 release_rx_pools(adapter);
770
1b8955ee 771 release_stats_token(adapter);
3d52b594 772 release_stats_buffers(adapter);
661a2622 773 release_error_buffers(adapter);
c7bac00b
NF		 774
775 if (adapter->napi) {
776 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 777 if (&adapter->napi[i]) {
778 netdev_dbg(adapter->netdev,
779 "Releasing napi[%d]\n", i);
c7bac00b 780 netif_napi_del(&adapter->napi[i]);
d1cf33d9 781 }
c7bac00b
NF		 782 }
783 }
1b8955ee
NF		 784}
785
53da09e9
NF		 786static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
787{
788 struct net_device *netdev = adapter->netdev;
789 unsigned long timeout = msecs_to_jiffies(30000);
790 union ibmvnic_crq crq;
791 bool resend;
792 int rc;
793
d1cf33d9
NF		 794 netdev_dbg(netdev, "setting link state %d\n", link_state);
795
53da09e9
NF		 796 memset(&crq, 0, sizeof(crq));
797 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
798 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
799 crq.logical_link_state.link_state = link_state;
800
801 do {
802 resend = false;
803
804 reinit_completion(&adapter->init_done);
805 rc = ibmvnic_send_crq(adapter, &crq);
806 if (rc) {
807 netdev_err(netdev, "Failed to set link state\n");
808 return rc;
809 }
810
811 if (!wait_for_completion_timeout(&adapter->init_done,
812 timeout)) {
813 netdev_err(netdev, "timeout setting link state\n");
814 return -1;
815 }
816
817 if (adapter->init_done_rc == 1) {
818 /* Partuial success, delay and re-send */
819 mdelay(1000);
820 resend = true;
821 }
822 } while (resend);
823
824 return 0;
825}
826
7f3c6e6b
TF		 827static int set_real_num_queues(struct net_device *netdev)
828{
829 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
830 int rc;
831
d1cf33d9
NF		 832 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
833 adapter->req_tx_queues, adapter->req_rx_queues);
834
7f3c6e6b
TF		 835 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
836 if (rc) {
837 netdev_err(netdev, "failed to set the number of tx queues\n");
838 return rc;
839 }
840
841 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
842 if (rc)
843 netdev_err(netdev, "failed to set the number of rx queues\n");
844
845 return rc;
846}
847
4e6759be
DANR		 848static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
849{
850 struct device *dev = &adapter->vdev->dev;
851 union ibmvnic_crq crq;
4e6759be
DANR		 852 int len = 0;
853
854 if (adapter->vpd->buff)
855 len = adapter->vpd->len;
856
857 reinit_completion(&adapter->fw_done);
858 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
859 crq.get_vpd_size.cmd = GET_VPD_SIZE;
860 ibmvnic_send_crq(adapter, &crq);
861 wait_for_completion(&adapter->fw_done);
862
863 if (!adapter->vpd->len)
864 return -ENODATA;
865
866 if (!adapter->vpd->buff)
867 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
868 else if (adapter->vpd->len != len)
869 adapter->vpd->buff =
870 krealloc(adapter->vpd->buff,
871 adapter->vpd->len, GFP_KERNEL);
872
873 if (!adapter->vpd->buff) {
874 dev_err(dev, "Could allocate VPD buffer\n");
875 return -ENOMEM;
876 }
877
878 adapter->vpd->dma_addr =
879 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
880 DMA_FROM_DEVICE);
f743106e 881 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
4e6759be
DANR		 882 dev_err(dev, "Could not map VPD buffer\n");
883 kfree(adapter->vpd->buff);
884 return -ENOMEM;
885 }
886
887 reinit_completion(&adapter->fw_done);
888 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
889 crq.get_vpd.cmd = GET_VPD;
890 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
891 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
892 ibmvnic_send_crq(adapter, &crq);
893 wait_for_completion(&adapter->fw_done);
894
895 return 0;
896}
897
bfc32f29 898static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 899{
bfc32f29
NF		 900 struct net_device *netdev = adapter->netdev;
901 int i, rc;
a57a5d25 902
7f3c6e6b
TF		 903 rc = set_real_num_queues(netdev);
904 if (rc)
905 return rc;
bd0b6723 906
3d52b594
JA		 907 rc = init_stats_buffers(adapter);
908 if (rc)
909 return rc;
910
5d5e84eb
NF		 911 rc = init_stats_token(adapter);
912 if (rc)
913 return rc;
914
4e6759be
DANR		 915 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
916 if (!adapter->vpd)
917 return -ENOMEM;
918
032c5e82
TF		 919 adapter->map_id = 1;
920 adapter->napi = kcalloc(adapter->req_rx_queues,
921 sizeof(struct napi_struct), GFP_KERNEL);
922 if (!adapter->napi)
bfc32f29
NF		 923 return -ENOMEM;
924
032c5e82 925 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 926 netdev_dbg(netdev, "Adding napi[%d]\n", i);
032c5e82
TF		 927 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
928 NAPI_POLL_WEIGHT);
032c5e82 929 }
032c5e82 930
032c5e82 931 send_map_query(adapter);
0ffe2cb7
NF		 932
933 rc = init_rx_pools(netdev);
934 if (rc)
bfc32f29 935 return rc;
032c5e82 936
c657e32c 937 rc = init_tx_pools(netdev);
bfc32f29
NF		 938 return rc;
939}
940
ed651a10 941static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 942{
943 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 944 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 945 int i, rc;
946
90c8014c 947 adapter->state = VNIC_OPENING;
032c5e82 948 replenish_pools(adapter);
d944c3d6 949 ibmvnic_napi_enable(adapter);
bfc32f29 950
032c5e82
TF		 951 /* We're ready to receive frames, enable the sub-crq interrupts and
952 * set the logical link state to up
953 */
ed651a10 954 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 955 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
ed651a10
NF		 956 if (prev_state == VNIC_CLOSED)
957 enable_irq(adapter->rx_scrq[i]->irq);
958 else
959 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
960 }
032c5e82 961
ed651a10 962 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 963 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
ed651a10
NF		 964 if (prev_state == VNIC_CLOSED)
965 enable_irq(adapter->tx_scrq[i]->irq);
966 else
967 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
968 }
032c5e82 969
53da09e9 970 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 971 if (rc) {
972 for (i = 0; i < adapter->req_rx_queues; i++)
973 napi_disable(&adapter->napi[i]);
974 release_resources(adapter);
ed651a10 975 return rc;
bfc32f29 976 }
032c5e82 977
ed651a10
NF		 978 netif_tx_start_all_queues(netdev);
979
980 if (prev_state == VNIC_CLOSED) {
981 for (i = 0; i < adapter->req_rx_queues; i++)
982 napi_schedule(&adapter->napi[i]);
983 }
984
985 adapter->state = VNIC_OPEN;
986 return rc;
987}
988
989static int ibmvnic_open(struct net_device *netdev)
990{
991 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4e6759be 992 int rc, vpd;
ed651a10
NF		 993
994 mutex_lock(&adapter->reset_lock);
995
c26eba03
JA		 996 if (adapter->mac_change_pending) {
997 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
998 adapter->mac_change_pending = false;
999 }
1000
ed651a10
NF		 1001 if (adapter->state != VNIC_CLOSED) {
1002 rc = ibmvnic_login(netdev);
1003 if (rc) {
1004 mutex_unlock(&adapter->reset_lock);
1005 return rc;
1006 }
1007
1008 rc = init_resources(adapter);
1009 if (rc) {
1010 netdev_err(netdev, "failed to initialize resources\n");
1011 release_resources(adapter);
1012 mutex_unlock(&adapter->reset_lock);
1013 return rc;
1014 }
1015 }
1016
1017 rc = __ibmvnic_open(netdev);
e876a8a7 1018 netif_carrier_on(netdev);
4e6759be
DANR		 1019
1020 /* Vital Product Data (VPD) */
1021 vpd = ibmvnic_get_vpd(adapter);
1022 if (vpd)
1023 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1024
ed651a10
NF		 1025 mutex_unlock(&adapter->reset_lock);
1026
bfc32f29 1027 return rc;
032c5e82
TF		 1028}
1029
b41b83e9
NF		 1030static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1031{
1032 struct ibmvnic_tx_pool *tx_pool;
1033 u64 tx_entries;
1034 int tx_scrqs;
1035 int i, j;
1036
1037 if (!adapter->tx_pool)
1038 return;
1039
1040 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1041 tx_entries = adapter->req_tx_entries_per_subcrq;
1042
1043 /* Free any remaining skbs in the tx buffer pools */
1044 for (i = 0; i < tx_scrqs; i++) {
1045 tx_pool = &adapter->tx_pool[i];
1046 if (!tx_pool)
1047 continue;
1048
d1cf33d9 1049 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
b41b83e9
NF		 1050 for (j = 0; j < tx_entries; j++) {
1051 if (tx_pool->tx_buff[j].skb) {
1052 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1053 tx_pool->tx_buff[j].skb = NULL;
1054 }
1055 }
1056 }
1057}
1058
ed651a10 1059static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 1060{
1061 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 1062 int rc = 0;
ea5509f5
JA		 1063 int i;
1064
90c8014c 1065 adapter->state = VNIC_CLOSING;
4c2687a5
TF		 1066
1067 /* ensure that transmissions are stopped if called by do_reset */
1068 if (adapter->resetting)
1069 netif_tx_disable(netdev);
1070 else
1071 netif_tx_stop_all_queues(netdev);
1072
d944c3d6 1073 ibmvnic_napi_disable(adapter);
46293b94
NF		 1074
1075 if (adapter->tx_scrq) {
1076 for (i = 0; i < adapter->req_tx_queues; i++)
d1cf33d9
NF		 1077 if (adapter->tx_scrq[i]->irq) {
1078 netdev_dbg(adapter->netdev,
1079 "Disabling tx_scrq[%d] irq\n", i);
46293b94 1080 disable_irq(adapter->tx_scrq[i]->irq);
d1cf33d9 1081 }
46293b94
NF		 1082 }
1083
53da09e9 1084 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
46293b94
NF		 1085 if (rc)
1086 return rc;
1087
1088 if (adapter->rx_scrq) {
1089 for (i = 0; i < adapter->req_rx_queues; i++) {
1090 int retries = 10;
1091
1092 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1093 retries--;
1094 mdelay(100);
1095
1096 if (retries == 0)
1097 break;
1098 }
1099
d1cf33d9
NF		 1100 if (adapter->rx_scrq[i]->irq) {
1101 netdev_dbg(adapter->netdev,
1102 "Disabling rx_scrq[%d] irq\n", i);
46293b94 1103 disable_irq(adapter->rx_scrq[i]->irq);
d1cf33d9 1104 }
46293b94
NF		 1105 }
1106 }
ea5509f5 1107
10f76215 1108 clean_tx_pools(adapter);
90c8014c 1109 adapter->state = VNIC_CLOSED;
53da09e9 1110 return rc;
032c5e82
TF		 1111}
1112
ed651a10
NF		 1113static int ibmvnic_close(struct net_device *netdev)
1114{
1115 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1116 int rc;
1117
1118 mutex_lock(&adapter->reset_lock);
1119 rc = __ibmvnic_close(netdev);
1120 mutex_unlock(&adapter->reset_lock);
1121
1122 return rc;
1123}
1124
ad7775dc
TF		 1125/**
1126 * build_hdr_data - creates L2/L3/L4 header data buffer
1127 * @hdr_field - bitfield determining needed headers
1128 * @skb - socket buffer
1129 * @hdr_len - array of header lengths
1130 * @tot_len - total length of data
1131 *
1132 * Reads hdr_field to determine which headers are needed by firmware.
1133 * Builds a buffer containing these headers. Saves individual header
1134 * lengths and total buffer length to be used to build descriptors.
1135 */
1136static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1137 int *hdr_len, u8 *hdr_data)
1138{
1139 int len = 0;
1140 u8 *hdr;
1141
1142 hdr_len[0] = sizeof(struct ethhdr);
1143
1144 if (skb->protocol == htons(ETH_P_IP)) {
1145 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1146 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1147 hdr_len[2] = tcp_hdrlen(skb);
1148 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1149 hdr_len[2] = sizeof(struct udphdr);
1150 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1151 hdr_len[1] = sizeof(struct ipv6hdr);
1152 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1153 hdr_len[2] = tcp_hdrlen(skb);
1154 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1155 hdr_len[2] = sizeof(struct udphdr);
1156 }
1157
1158 memset(hdr_data, 0, 120);
1159 if ((hdr_field >> 6) & 1) {
1160 hdr = skb_mac_header(skb);
1161 memcpy(hdr_data, hdr, hdr_len[0]);
1162 len += hdr_len[0];
1163 }
1164
1165 if ((hdr_field >> 5) & 1) {
1166 hdr = skb_network_header(skb);
1167 memcpy(hdr_data + len, hdr, hdr_len[1]);
1168 len += hdr_len[1];
1169 }
1170
1171 if ((hdr_field >> 4) & 1) {
1172 hdr = skb_transport_header(skb);
1173 memcpy(hdr_data + len, hdr, hdr_len[2]);
1174 len += hdr_len[2];
1175 }
1176 return len;
1177}
1178
1179/**
1180 * create_hdr_descs - create header and header extension descriptors
1181 * @hdr_field - bitfield determining needed headers
1182 * @data - buffer containing header data
1183 * @len - length of data buffer
1184 * @hdr_len - array of individual header lengths
1185 * @scrq_arr - descriptor array
1186 *
1187 * Creates header and, if needed, header extension descriptors and
1188 * places them in a descriptor array, scrq_arr
1189 */
1190
2de09681
TF		 1191static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1192 union sub_crq *scrq_arr)
ad7775dc
TF		 1193{
1194 union sub_crq hdr_desc;
1195 int tmp_len = len;
2de09681 1196 int num_descs = 0;
ad7775dc
TF		 1197 u8 *data, *cur;
1198 int tmp;
1199
1200 while (tmp_len > 0) {
1201 cur = hdr_data + len - tmp_len;
1202
1203 memset(&hdr_desc, 0, sizeof(hdr_desc));
1204 if (cur != hdr_data) {
1205 data = hdr_desc.hdr_ext.data;
1206 tmp = tmp_len > 29 ? 29 : tmp_len;
1207 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1208 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1209 hdr_desc.hdr_ext.len = tmp;
1210 } else {
1211 data = hdr_desc.hdr.data;
1212 tmp = tmp_len > 24 ? 24 : tmp_len;
1213 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1214 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1215 hdr_desc.hdr.len = tmp;
1216 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1217 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1218 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1219 hdr_desc.hdr.flag = hdr_field << 1;
1220 }
1221 memcpy(data, cur, tmp);
1222 tmp_len -= tmp;
1223 *scrq_arr = hdr_desc;
1224 scrq_arr++;
2de09681 1225 num_descs++;
ad7775dc 1226 }
2de09681
TF		 1227
1228 return num_descs;
ad7775dc
TF		 1229}
1230
1231/**
1232 * build_hdr_descs_arr - build a header descriptor array
1233 * @skb - socket buffer
1234 * @num_entries - number of descriptors to be sent
1235 * @subcrq - first TX descriptor
1236 * @hdr_field - bit field determining which headers will be sent
1237 *
1238 * This function will build a TX descriptor array with applicable
1239 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1240 */
1241
1242static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1243 int *num_entries, u8 hdr_field)
1244{
1245 int hdr_len[3] = {0, 0, 0};
2de09681 1246 int tot_len;
ad7775dc
TF		 1247 u8 *hdr_data = txbuff->hdr_data;
1248
1249 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1250 txbuff->hdr_data);
2de09681 1251 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
ad7775dc
TF		 1252 txbuff->indir_arr + 1);
1253}
1254
032c5e82
TF		 1255static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1256{
1257 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1258 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 1259 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 1260 struct device *dev = &adapter->vdev->dev;
1261 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 1262 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 1263 struct ibmvnic_tx_pool *tx_pool;
1264 unsigned int tx_send_failed = 0;
1265 unsigned int tx_map_failed = 0;
1266 unsigned int tx_dropped = 0;
1267 unsigned int tx_packets = 0;
1268 unsigned int tx_bytes = 0;
1269 dma_addr_t data_dma_addr;
1270 struct netdev_queue *txq;
032c5e82
TF		 1271 unsigned long lpar_rc;
1272 union sub_crq tx_crq;
1273 unsigned int offset;
ad7775dc 1274 int num_entries = 1;
032c5e82
TF		 1275 unsigned char *dst;
1276 u64 *handle_array;
1277 int index = 0;
1278 int ret = 0;
1279
ed651a10 1280 if (adapter->resetting) {
7f5b0308
TF		 1281 if (!netif_subqueue_stopped(netdev, skb))
1282 netif_stop_subqueue(netdev, queue_num);
1283 dev_kfree_skb_any(skb);
1284
032c5e82
TF		 1285 tx_send_failed++;
1286 tx_dropped++;
7f5b0308 1287 ret = NETDEV_TX_OK;
032c5e82
TF		 1288 goto out;
1289 }
1290
161b8a81
NF		 1291 tx_pool = &adapter->tx_pool[queue_num];
1292 tx_scrq = adapter->tx_scrq[queue_num];
1293 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1294 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1295 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1296
032c5e82 1297 index = tx_pool->free_map[tx_pool->consumer_index];
fdb06105
TF		 1298
1299 if (skb_is_gso(skb)) {
1300 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1301 dst = tx_pool->tso_ltb.buff + offset;
1302 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1303 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1304 tx_pool->tso_index++;
1305 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1306 tx_pool->tso_index = 0;
1307 } else {
1308 offset = index * adapter->req_mtu;
1309 dst = tx_pool->long_term_buff.buff + offset;
1310 memset(dst, 0, adapter->req_mtu);
1311 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1312 }
032c5e82 1313
15482056
TF		 1314 if (skb_shinfo(skb)->nr_frags) {
1315 int cur, i;
1316
1317 /* Copy the head */
1318 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1319 cur = skb_headlen(skb);
1320
1321 /* Copy the frags */
1322 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1323 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1324
1325 memcpy(dst + cur,
1326 page_address(skb_frag_page(frag)) +
1327 frag->page_offset, skb_frag_size(frag));
1328 cur += skb_frag_size(frag);
1329 }
1330 } else {
1331 skb_copy_from_linear_data(skb, dst, skb->len);
1332 }
1333
032c5e82
TF		 1334 tx_pool->consumer_index =
1335 (tx_pool->consumer_index + 1) %
068d9f90 1336 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1337
1338 tx_buff = &tx_pool->tx_buff[index];
1339 tx_buff->skb = skb;
1340 tx_buff->data_dma[0] = data_dma_addr;
1341 tx_buff->data_len[0] = skb->len;
1342 tx_buff->index = index;
1343 tx_buff->pool_index = queue_num;
1344 tx_buff->last_frag = true;
032c5e82
TF		 1345
1346 memset(&tx_crq, 0, sizeof(tx_crq));
1347 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1348 tx_crq.v1.type = IBMVNIC_TX_DESC;
1349 tx_crq.v1.n_crq_elem = 1;
1350 tx_crq.v1.n_sge = 1;
1351 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1352 tx_crq.v1.correlator = cpu_to_be32(index);
fdb06105
TF		 1353 if (skb_is_gso(skb))
1354 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1355 else
1356 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
032c5e82
TF		 1357 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1358 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1359
1360 if (adapter->vlan_header_insertion) {
1361 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1362 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1363 }
1364
1365 if (skb->protocol == htons(ETH_P_IP)) {
1366 if (ip_hdr(skb)->version == 4)
1367 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1368 else if (ip_hdr(skb)->version == 6)
1369 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1370
1371 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1372 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1373 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1374 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1375 }
1376
ad7775dc 1377 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1378 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1379 hdrs += 2;
1380 }
fdb06105
TF		 1381 if (skb_is_gso(skb)) {
1382 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1383 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1384 hdrs += 2;
1385 }
ad7775dc
TF		 1386 /* determine if l2/3/4 headers are sent to firmware */
1387 if ((*hdrs >> 7) & 1 &&
1388 (skb->protocol == htons(ETH_P_IP) ||
1389 skb->protocol == htons(ETH_P_IPV6))) {
1390 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1391 tx_crq.v1.n_crq_elem = num_entries;
1392 tx_buff->indir_arr[0] = tx_crq;
1393 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1394 sizeof(tx_buff->indir_arr),
1395 DMA_TO_DEVICE);
1396 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1397 dev_kfree_skb_any(skb);
1398 tx_buff->skb = NULL;
ad7775dc
TF		 1399 if (!firmware_has_feature(FW_FEATURE_CMO))
1400 dev_err(dev, "tx: unable to map descriptor array\n");
1401 tx_map_failed++;
1402 tx_dropped++;
7f5b0308 1403 ret = NETDEV_TX_OK;
ad7775dc
TF		 1404 goto out;
1405 }
498cd8e4 1406 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1407 (u64)tx_buff->indir_dma,
1408 (u64)num_entries);
1409 } else {
498cd8e4
JA		 1410 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1411 &tx_crq);
ad7775dc 1412 }
032c5e82
TF		 1413 if (lpar_rc != H_SUCCESS) {
1414 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1415
1416 if (tx_pool->consumer_index == 0)
1417 tx_pool->consumer_index =
068d9f90 1418 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1419 else
1420 tx_pool->consumer_index--;
1421
7f5b0308
TF		 1422 dev_kfree_skb_any(skb);
1423 tx_buff->skb = NULL;
1424
b8c80b84
TF		 1425 if (lpar_rc == H_CLOSED) {
1426 /* Disable TX and report carrier off if queue is closed.
1427 * Firmware guarantees that a signal will be sent to the
1428 * driver, triggering a reset or some other action.
1429 */
1430 netif_tx_stop_all_queues(netdev);
1431 netif_carrier_off(netdev);
1432 }
7f5b0308 1433
032c5e82
TF		 1434 tx_send_failed++;
1435 tx_dropped++;
7f5b0308 1436 ret = NETDEV_TX_OK;
032c5e82
TF		 1437 goto out;
1438 }
142c0ac4 1439
58c8c0c0
BK		 1440 if (atomic_inc_return(&tx_scrq->used)
1441 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1442 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1443 netif_stop_subqueue(netdev, queue_num);
1444 }
1445
032c5e82
TF		 1446 tx_packets++;
1447 tx_bytes += skb->len;
1448 txq->trans_start = jiffies;
1449 ret = NETDEV_TX_OK;
1450
1451out:
1452 netdev->stats.tx_dropped += tx_dropped;
1453 netdev->stats.tx_bytes += tx_bytes;
1454 netdev->stats.tx_packets += tx_packets;
1455 adapter->tx_send_failed += tx_send_failed;
1456 adapter->tx_map_failed += tx_map_failed;
3d52b594
JA		 1457 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1458 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1459 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
032c5e82
TF		 1460
1461 return ret;
1462}
1463
1464static void ibmvnic_set_multi(struct net_device *netdev)
1465{
1466 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1467 struct netdev_hw_addr *ha;
1468 union ibmvnic_crq crq;
1469
1470 memset(&crq, 0, sizeof(crq));
1471 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1472 crq.request_capability.cmd = REQUEST_CAPABILITY;
1473
1474 if (netdev->flags & IFF_PROMISC) {
1475 if (!adapter->promisc_supported)
1476 return;
1477 } else {
1478 if (netdev->flags & IFF_ALLMULTI) {
1479 /* Accept all multicast */
1480 memset(&crq, 0, sizeof(crq));
1481 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1482 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1483 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1484 ibmvnic_send_crq(adapter, &crq);
1485 } else if (netdev_mc_empty(netdev)) {
1486 /* Reject all multicast */
1487 memset(&crq, 0, sizeof(crq));
1488 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1489 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1490 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1491 ibmvnic_send_crq(adapter, &crq);
1492 } else {
1493 /* Accept one or more multicast(s) */
1494 netdev_for_each_mc_addr(ha, netdev) {
1495 memset(&crq, 0, sizeof(crq));
1496 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1497 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1498 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1499 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1500 ha->addr);
1501 ibmvnic_send_crq(adapter, &crq);
1502 }
1503 }
1504 }
1505}
1506
c26eba03 1507static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
032c5e82
TF		 1508{
1509 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1510 struct sockaddr *addr = p;
1511 union ibmvnic_crq crq;
1512
1513 if (!is_valid_ether_addr(addr->sa_data))
1514 return -EADDRNOTAVAIL;
1515
1516 memset(&crq, 0, sizeof(crq));
1517 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1518 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1519 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1520 ibmvnic_send_crq(adapter, &crq);
1521 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1522 return 0;
1523}
1524
c26eba03
JA		 1525static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1526{
1527 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1528 struct sockaddr *addr = p;
1529
1530 if (adapter->state != VNIC_OPEN) {
1531 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1532 adapter->mac_change_pending = true;
1533 return 0;
1534 }
1535
1536 __ibmvnic_set_mac(netdev, addr);
1537
1538 return 0;
1539}
1540
ed651a10
NF		 1541/**
1542 * do_reset returns zero if we are able to keep processing reset events, or
1543 * non-zero if we hit a fatal error and must halt.
1544 */
1545static int do_reset(struct ibmvnic_adapter *adapter,
1546 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1547{
ed651a10
NF		 1548 struct net_device *netdev = adapter->netdev;
1549 int i, rc;
1550
d1cf33d9
NF		 1551 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1552 rwi->reset_reason);
1553
ed651a10
NF		 1554 netif_carrier_off(netdev);
1555 adapter->reset_reason = rwi->reset_reason;
1556
1557 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1558 rc = ibmvnic_reenable_crq_queue(adapter);
1559 if (rc)
1560 return 0;
1561 }
1562
1563 rc = __ibmvnic_close(netdev);
1564 if (rc)
1565 return rc;
1566
c26eba03
JA		 1567 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1568 adapter->wait_for_reset) {
1569 release_resources(adapter);
1570 release_sub_crqs(adapter);
1571 release_crq_queue(adapter);
1572 }
1573
8cb31cfc
JA		 1574 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1575 /* remove the closed state so when we call open it appears
1576 * we are coming from the probed state.
1577 */
1578 adapter->state = VNIC_PROBED;
032c5e82 1579
8cb31cfc
JA		 1580 rc = ibmvnic_init(adapter);
1581 if (rc)
2a1bf511 1582 return IBMVNIC_INIT_FAILED;
ed651a10 1583
8cb31cfc
JA		 1584 /* If the adapter was in PROBE state prior to the reset,
1585 * exit here.
1586 */
1587 if (reset_state == VNIC_PROBED)
1588 return 0;
ed651a10 1589
8cb31cfc
JA		 1590 rc = ibmvnic_login(netdev);
1591 if (rc) {
1592 adapter->state = VNIC_PROBED;
1593 return 0;
1594 }
ed651a10 1595
c26eba03
JA		 1596 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1597 adapter->wait_for_reset) {
1598 rc = init_resources(adapter);
1599 if (rc)
1600 return rc;
1601 } else {
1602 rc = reset_tx_pools(adapter);
1603 if (rc)
1604 return rc;
8c0543ad 1605
c26eba03
JA		 1606 rc = reset_rx_pools(adapter);
1607 if (rc)
1608 return rc;
ed651a10 1609
c26eba03
JA		 1610 if (reset_state == VNIC_CLOSED)
1611 return 0;
1612 }
8cb31cfc 1613 }
ed651a10
NF		 1614
1615 rc = __ibmvnic_open(netdev);
1616 if (rc) {
1617 if (list_empty(&adapter->rwi_list))
1618 adapter->state = VNIC_CLOSED;
1619 else
1620 adapter->state = reset_state;
1621
1622 return 0;
1623 }
1624
1625 netif_carrier_on(netdev);
1626
1627 /* kick napi */
1628 for (i = 0; i < adapter->req_rx_queues; i++)
1629 napi_schedule(&adapter->napi[i]);
1630
61d3e1d9
NF		 1631 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1632 netdev_notify_peers(netdev);
1633
ed651a10
NF		 1634 return 0;
1635}
1636
1637static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1638{
1639 struct ibmvnic_rwi *rwi;
1640
1641 mutex_lock(&adapter->rwi_lock);
1642
1643 if (!list_empty(&adapter->rwi_list)) {
1644 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1645 list);
1646 list_del(&rwi->list);
1647 } else {
1648 rwi = NULL;
1649 }
1650
1651 mutex_unlock(&adapter->rwi_lock);
1652 return rwi;
1653}
1654
1655static void free_all_rwi(struct ibmvnic_adapter *adapter)
1656{
1657 struct ibmvnic_rwi *rwi;
1658
1659 rwi = get_next_rwi(adapter);
1660 while (rwi) {
1661 kfree(rwi);
1662 rwi = get_next_rwi(adapter);
1663 }
1664}
1665
1666static void __ibmvnic_reset(struct work_struct *work)
1667{
1668 struct ibmvnic_rwi *rwi;
1669 struct ibmvnic_adapter *adapter;
1670 struct net_device *netdev;
1671 u32 reset_state;
c26eba03 1672 int rc = 0;
ed651a10
NF		 1673
1674 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1675 netdev = adapter->netdev;
1676
1677 mutex_lock(&adapter->reset_lock);
1678 adapter->resetting = true;
1679 reset_state = adapter->state;
1680
1681 rwi = get_next_rwi(adapter);
1682 while (rwi) {
1683 rc = do_reset(adapter, rwi, reset_state);
1684 kfree(rwi);
2a1bf511 1685 if (rc && rc != IBMVNIC_INIT_FAILED)
ed651a10
NF		 1686 break;
1687
1688 rwi = get_next_rwi(adapter);
1689 }
1690
c26eba03
JA		 1691 if (adapter->wait_for_reset) {
1692 adapter->wait_for_reset = false;
1693 adapter->reset_done_rc = rc;
1694 complete(&adapter->reset_done);
1695 }
1696
ed651a10 1697 if (rc) {
d1cf33d9 1698 netdev_dbg(adapter->netdev, "Reset failed\n");
ed651a10 1699 free_all_rwi(adapter);
6d0af07d 1700 mutex_unlock(&adapter->reset_lock);
ed651a10
NF		 1701 return;
1702 }
1703
1704 adapter->resetting = false;
1705 mutex_unlock(&adapter->reset_lock);
1706}
1707
1708static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1709 enum ibmvnic_reset_reason reason)
1710{
1711 struct ibmvnic_rwi *rwi, *tmp;
1712 struct net_device *netdev = adapter->netdev;
1713 struct list_head *entry;
1714
1715 if (adapter->state == VNIC_REMOVING ||
1716 adapter->state == VNIC_REMOVED) {
1717 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1718 return;
1719 }
1720
6a2fb0e9
NF		 1721 if (adapter->state == VNIC_PROBING) {
1722 netdev_warn(netdev, "Adapter reset during probe\n");
1723 adapter->init_done_rc = EAGAIN;
1724 return;
1725 }
1726
ed651a10
NF		 1727 mutex_lock(&adapter->rwi_lock);
1728
1729 list_for_each(entry, &adapter->rwi_list) {
1730 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1731 if (tmp->reset_reason == reason) {
d1cf33d9 1732 netdev_dbg(netdev, "Skipping matching reset\n");
ed651a10
NF		 1733 mutex_unlock(&adapter->rwi_lock);
1734 return;
1735 }
1736 }
1737
1738 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1739 if (!rwi) {
1740 mutex_unlock(&adapter->rwi_lock);
1741 ibmvnic_close(netdev);
1742 return;
1743 }
1744
1745 rwi->reset_reason = reason;
1746 list_add_tail(&rwi->list, &adapter->rwi_list);
1747 mutex_unlock(&adapter->rwi_lock);
d1cf33d9
NF		 1748
1749 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
ed651a10
NF		 1750 schedule_work(&adapter->ibmvnic_reset);
1751}
1752
1753static void ibmvnic_tx_timeout(struct net_device *dev)
1754{
1755 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1756
1757 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1758}
1759
1760static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1761 struct ibmvnic_rx_buff *rx_buff)
1762{
1763 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1764
1765 rx_buff->skb = NULL;
1766
1767 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1768 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1769
1770 atomic_dec(&pool->available);
1771}
1772
1773static int ibmvnic_poll(struct napi_struct *napi, int budget)
1774{
1775 struct net_device *netdev = napi->dev;
1776 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1777 int scrq_num = (int)(napi - adapter->napi);
1778 int frames_processed = 0;
152ce47d 1779
032c5e82
TF		 1780restart_poll:
1781 while (frames_processed < budget) {
1782 struct sk_buff *skb;
1783 struct ibmvnic_rx_buff *rx_buff;
1784 union sub_crq *next;
1785 u32 length;
1786 u16 offset;
1787 u8 flags = 0;
1788
21ecba6c
TF		 1789 if (unlikely(adapter->resetting)) {
1790 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1791 napi_complete_done(napi, frames_processed);
1792 return frames_processed;
1793 }
1794
032c5e82
TF		 1795 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1796 break;
1797 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1798 rx_buff =
1799 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1800 rx_comp.correlator);
1801 /* do error checking */
1802 if (next->rx_comp.rc) {
e1cea2e7
JA		 1803 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1804 be16_to_cpu(next->rx_comp.rc));
032c5e82
TF		 1805 /* free the entry */
1806 next->rx_comp.first = 0;
1807 remove_buff_from_pool(adapter, rx_buff);
ca05e316 1808 continue;
032c5e82
TF		 1809 }
1810
1811 length = be32_to_cpu(next->rx_comp.len);
1812 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1813 flags = next->rx_comp.flags;
1814 skb = rx_buff->skb;
1815 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1816 length);
6052d5e2
MFV		 1817
1818 /* VLAN Header has been stripped by the system firmware and
1819 * needs to be inserted by the driver
1820 */
1821 if (adapter->rx_vlan_header_insertion &&
1822 (flags & IBMVNIC_VLAN_STRIPPED))
1823 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1824 ntohs(next->rx_comp.vlan_tci));
1825
032c5e82
TF		 1826 /* free the entry */
1827 next->rx_comp.first = 0;
1828 remove_buff_from_pool(adapter, rx_buff);
1829
1830 skb_put(skb, length);
1831 skb->protocol = eth_type_trans(skb, netdev);
94ca305f 1832 skb_record_rx_queue(skb, scrq_num);
032c5e82
TF		 1833
1834 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1835 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1836 skb->ip_summed = CHECKSUM_UNNECESSARY;
1837 }
1838
1839 length = skb->len;
1840 napi_gro_receive(napi, skb); /* send it up */
1841 netdev->stats.rx_packets++;
1842 netdev->stats.rx_bytes += length;
3d52b594
JA		 1843 adapter->rx_stats_buffers[scrq_num].packets++;
1844 adapter->rx_stats_buffers[scrq_num].bytes += length;
032c5e82
TF		 1845 frames_processed++;
1846 }
152ce47d
NF		 1847
1848 if (adapter->state != VNIC_CLOSING)
1849 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1850
1851 if (frames_processed < budget) {
1852 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1853 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1854 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1855 napi_reschedule(napi)) {
1856 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1857 goto restart_poll;
1858 }
1859 }
1860 return frames_processed;
1861}
1862
1863#ifdef CONFIG_NET_POLL_CONTROLLER
1864static void ibmvnic_netpoll_controller(struct net_device *dev)
1865{
1866 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1867 int i;
1868
1869 replenish_pools(netdev_priv(dev));
1870 for (i = 0; i < adapter->req_rx_queues; i++)
1871 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1872 adapter->rx_scrq[i]);
1873}
1874#endif
1875
c26eba03
JA		 1876static int wait_for_reset(struct ibmvnic_adapter *adapter)
1877{
1878 adapter->fallback.mtu = adapter->req_mtu;
1879 adapter->fallback.rx_queues = adapter->req_rx_queues;
1880 adapter->fallback.tx_queues = adapter->req_tx_queues;
1881 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1882 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1883
1884 init_completion(&adapter->reset_done);
1885 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1886 adapter->wait_for_reset = true;
1887 wait_for_completion(&adapter->reset_done);
1888
1889 if (adapter->reset_done_rc) {
1890 adapter->desired.mtu = adapter->fallback.mtu;
1891 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1892 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1893 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1894 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1895
1896 init_completion(&adapter->reset_done);
1897 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1898 wait_for_completion(&adapter->reset_done);
1899 }
1900 adapter->wait_for_reset = false;
1901
1902 return adapter->reset_done_rc;
1903}
1904
3a807b75
JA		 1905static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1906{
c26eba03
JA		 1907 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1908
1909 adapter->desired.mtu = new_mtu + ETH_HLEN;
1910
1911 return wait_for_reset(adapter);
3a807b75
JA		 1912}
1913
032c5e82
TF		 1914static const struct net_device_ops ibmvnic_netdev_ops = {
1915 .ndo_open = ibmvnic_open,
1916 .ndo_stop = ibmvnic_close,
1917 .ndo_start_xmit = ibmvnic_xmit,
1918 .ndo_set_rx_mode = ibmvnic_set_multi,
1919 .ndo_set_mac_address = ibmvnic_set_mac,
1920 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1921 .ndo_tx_timeout = ibmvnic_tx_timeout,
1922#ifdef CONFIG_NET_POLL_CONTROLLER
1923 .ndo_poll_controller = ibmvnic_netpoll_controller,
1924#endif
3a807b75 1925 .ndo_change_mtu = ibmvnic_change_mtu,
032c5e82
TF		 1926};
1927
1928/* ethtool functions */
1929
8a43379f
PR		 1930static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1931 struct ethtool_link_ksettings *cmd)
032c5e82 1932{
8a43379f
PR		 1933 u32 supported, advertising;
1934
1935 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1936 SUPPORTED_FIBRE);
8a43379f 1937 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1938 ADVERTISED_FIBRE);
8a43379f
PR		 1939 cmd->base.speed = SPEED_1000;
1940 cmd->base.duplex = DUPLEX_FULL;
1941 cmd->base.port = PORT_FIBRE;
1942 cmd->base.phy_address = 0;
1943 cmd->base.autoneg = AUTONEG_ENABLE;
1944
1945 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1946 supported);
1947 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1948 advertising);
1949
032c5e82
TF		 1950 return 0;
1951}
1952
4e6759be 1953static void ibmvnic_get_drvinfo(struct net_device *netdev,
032c5e82
TF		 1954 struct ethtool_drvinfo *info)
1955{
4e6759be
DANR		 1956 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1957
032c5e82
TF		 1958 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1959 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
4e6759be
DANR		 1960 strlcpy(info->fw_version, adapter->fw_version,
1961 sizeof(info->fw_version));
032c5e82
TF		 1962}
1963
1964static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1965{
1966 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1967
1968 return adapter->msg_enable;
1969}
1970
1971static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1972{
1973 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1974
1975 adapter->msg_enable = data;
1976}
1977
1978static u32 ibmvnic_get_link(struct net_device *netdev)
1979{
1980 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1981
1982 /* Don't need to send a query because we request a logical link up at
1983 * init and then we wait for link state indications
1984 */
1985 return adapter->logical_link_state;
1986}
1987
1988static void ibmvnic_get_ringparam(struct net_device *netdev,
1989 struct ethtool_ringparam *ring)
1990{
bc131b3a
JA		 1991 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1992
1993 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
1994 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
032c5e82
TF		 1995 ring->rx_mini_max_pending = 0;
1996 ring->rx_jumbo_max_pending = 0;
bc131b3a
JA		 1997 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
1998 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1999 ring->rx_mini_pending = 0;
2000 ring->rx_jumbo_pending = 0;
2001}
2002
c26eba03
JA		 2003static int ibmvnic_set_ringparam(struct net_device *netdev,
2004 struct ethtool_ringparam *ring)
2005{
2006 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2007
2008 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2009 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2010 netdev_err(netdev, "Invalid request.\n");
2011 netdev_err(netdev, "Max tx buffers = %llu\n",
2012 adapter->max_rx_add_entries_per_subcrq);
2013 netdev_err(netdev, "Max rx buffers = %llu\n",
2014 adapter->max_tx_entries_per_subcrq);
2015 return -EINVAL;
2016 }
2017
2018 adapter->desired.rx_entries = ring->rx_pending;
2019 adapter->desired.tx_entries = ring->tx_pending;
2020
2021 return wait_for_reset(adapter);
2022}
2023
c2dbeb67
JA		 2024static void ibmvnic_get_channels(struct net_device *netdev,
2025 struct ethtool_channels *channels)
2026{
2027 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2028
2029 channels->max_rx = adapter->max_rx_queues;
2030 channels->max_tx = adapter->max_tx_queues;
2031 channels->max_other = 0;
2032 channels->max_combined = 0;
2033 channels->rx_count = adapter->req_rx_queues;
2034 channels->tx_count = adapter->req_tx_queues;
2035 channels->other_count = 0;
2036 channels->combined_count = 0;
2037}
2038
c26eba03
JA		 2039static int ibmvnic_set_channels(struct net_device *netdev,
2040 struct ethtool_channels *channels)
2041{
2042 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2043
2044 adapter->desired.rx_queues = channels->rx_count;
2045 adapter->desired.tx_queues = channels->tx_count;
2046
2047 return wait_for_reset(adapter);
2048}
2049
032c5e82
TF		 2050static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2051{
3d52b594 2052 struct ibmvnic_adapter *adapter = netdev_priv(dev);
032c5e82
TF		 2053 int i;
2054
2055 if (stringset != ETH_SS_STATS)
2056 return;
2057
2058 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2059 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
3d52b594
JA		 2060
2061 for (i = 0; i < adapter->req_tx_queues; i++) {
2062 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2063 data += ETH_GSTRING_LEN;
2064
2065 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2066 data += ETH_GSTRING_LEN;
2067
2068 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2069 data += ETH_GSTRING_LEN;
2070 }
2071
2072 for (i = 0; i < adapter->req_rx_queues; i++) {
2073 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2074 data += ETH_GSTRING_LEN;
2075
2076 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2077 data += ETH_GSTRING_LEN;
2078
2079 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2080 data += ETH_GSTRING_LEN;
2081 }
032c5e82
TF		 2082}
2083
2084static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2085{
3d52b594
JA		 2086 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2087
032c5e82
TF		 2088 switch (sset) {
2089 case ETH_SS_STATS:
3d52b594
JA		 2090 return ARRAY_SIZE(ibmvnic_stats) +
2091 adapter->req_tx_queues * NUM_TX_STATS +
2092 adapter->req_rx_queues * NUM_RX_STATS;
032c5e82
TF		 2093 default:
2094 return -EOPNOTSUPP;
2095 }
2096}
2097
2098static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2099 struct ethtool_stats *stats, u64 *data)
2100{
2101 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2102 union ibmvnic_crq crq;
3d52b594 2103 int i, j;
032c5e82
TF		 2104
2105 memset(&crq, 0, sizeof(crq));
2106 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2107 crq.request_statistics.cmd = REQUEST_STATISTICS;
2108 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2109 crq.request_statistics.len =
2110 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 2111
2112 /* Wait for data to be written */
2113 init_completion(&adapter->stats_done);
db5d0b59 2114 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 2115 wait_for_completion(&adapter->stats_done);
2116
2117 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
52da5c11
JA		 2118 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2119 ibmvnic_stats[i].offset));
3d52b594
JA		 2120
2121 for (j = 0; j < adapter->req_tx_queues; j++) {
2122 data[i] = adapter->tx_stats_buffers[j].packets;
2123 i++;
2124 data[i] = adapter->tx_stats_buffers[j].bytes;
2125 i++;
2126 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2127 i++;
2128 }
2129
2130 for (j = 0; j < adapter->req_rx_queues; j++) {
2131 data[i] = adapter->rx_stats_buffers[j].packets;
2132 i++;
2133 data[i] = adapter->rx_stats_buffers[j].bytes;
2134 i++;
2135 data[i] = adapter->rx_stats_buffers[j].interrupts;
2136 i++;
2137 }
032c5e82
TF		 2138}
2139
2140static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 2141 .get_drvinfo = ibmvnic_get_drvinfo,
2142 .get_msglevel = ibmvnic_get_msglevel,
2143 .set_msglevel = ibmvnic_set_msglevel,
2144 .get_link = ibmvnic_get_link,
2145 .get_ringparam = ibmvnic_get_ringparam,
c26eba03 2146 .set_ringparam = ibmvnic_set_ringparam,
c2dbeb67 2147 .get_channels = ibmvnic_get_channels,
c26eba03 2148 .set_channels = ibmvnic_set_channels,
032c5e82
TF		 2149 .get_strings = ibmvnic_get_strings,
2150 .get_sset_count = ibmvnic_get_sset_count,
2151 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 2152 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 2153};
2154
2155/* Routines for managing CRQs/sCRQs */
2156
57a49436
NF		 2157static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2158 struct ibmvnic_sub_crq_queue *scrq)
2159{
2160 int rc;
2161
2162 if (scrq->irq) {
2163 free_irq(scrq->irq, scrq);
2164 irq_dispose_mapping(scrq->irq);
2165 scrq->irq = 0;
2166 }
2167
c8b2ad0a 2168 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
57a49436
NF		 2169 scrq->cur = 0;
2170
2171 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2172 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2173 return rc;
2174}
2175
2176static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2177{
2178 int i, rc;
2179
2180 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9 2181 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
57a49436
NF		 2182 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2183 if (rc)
2184 return rc;
2185 }
2186
2187 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9 2188 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
57a49436
NF		 2189 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2190 if (rc)
2191 return rc;
2192 }
2193
57a49436
NF		 2194 return rc;
2195}
2196
032c5e82
TF		 2197static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2198 struct ibmvnic_sub_crq_queue *scrq)
2199{
2200 struct device *dev = &adapter->vdev->dev;
2201 long rc;
2202
2203 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2204
2205 /* Close the sub-crqs */
2206 do {
2207 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2208 adapter->vdev->unit_address,
2209 scrq->crq_num);
2210 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2211
ffa73855
TF		 2212 if (rc) {
2213 netdev_err(adapter->netdev,
2214 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2215 scrq->crq_num, rc);
2216 }
2217
032c5e82
TF		 2218 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2219 DMA_BIDIRECTIONAL);
2220 free_pages((unsigned long)scrq->msgs, 2);
2221 kfree(scrq);
2222}
2223
2224static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2225 *adapter)
2226{
2227 struct device *dev = &adapter->vdev->dev;
2228 struct ibmvnic_sub_crq_queue *scrq;
2229 int rc;
2230
1bb3c739 2231 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 2232 if (!scrq)
2233 return NULL;
2234
7f7adc50 2235 scrq->msgs =
1bb3c739 2236 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 2237 if (!scrq->msgs) {
2238 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2239 goto zero_page_failed;
2240 }
2241
2242 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2243 DMA_BIDIRECTIONAL);
2244 if (dma_mapping_error(dev, scrq->msg_token)) {
2245 dev_warn(dev, "Couldn't map crq queue messages page\n");
2246 goto map_failed;
2247 }
2248
2249 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2250 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2251
2252 if (rc == H_RESOURCE)
2253 rc = ibmvnic_reset_crq(adapter);
2254
2255 if (rc == H_CLOSED) {
2256 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2257 } else if (rc) {
2258 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2259 goto reg_failed;
2260 }
2261
032c5e82
TF		 2262 scrq->adapter = adapter;
2263 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 2264 spin_lock_init(&scrq->lock);
2265
2266 netdev_dbg(adapter->netdev,
2267 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2268 scrq->crq_num, scrq->hw_irq, scrq->irq);
2269
2270 return scrq;
2271
032c5e82
TF		 2272reg_failed:
2273 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2274 DMA_BIDIRECTIONAL);
2275map_failed:
2276 free_pages((unsigned long)scrq->msgs, 2);
2277zero_page_failed:
2278 kfree(scrq);
2279
2280 return NULL;
2281}
2282
2283static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2284{
2285 int i;
2286
2287 if (adapter->tx_scrq) {
b510888f
NF		 2288 for (i = 0; i < adapter->req_tx_queues; i++) {
2289 if (!adapter->tx_scrq[i])
2290 continue;
2291
d1cf33d9
NF		 2292 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2293 i);
b510888f 2294 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 2295 free_irq(adapter->tx_scrq[i]->irq,
2296 adapter->tx_scrq[i]);
88eb98a0 2297 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 2298 adapter->tx_scrq[i]->irq = 0;
032c5e82 2299 }
b510888f
NF		 2300
2301 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2302 }
2303
9501df3c 2304 kfree(adapter->tx_scrq);
032c5e82
TF		 2305 adapter->tx_scrq = NULL;
2306 }
2307
2308 if (adapter->rx_scrq) {
b510888f
NF		 2309 for (i = 0; i < adapter->req_rx_queues; i++) {
2310 if (!adapter->rx_scrq[i])
2311 continue;
2312
d1cf33d9
NF		 2313 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2314 i);
b510888f 2315 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 2316 free_irq(adapter->rx_scrq[i]->irq,
2317 adapter->rx_scrq[i]);
88eb98a0 2318 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 2319 adapter->rx_scrq[i]->irq = 0;
032c5e82 2320 }
032c5e82 2321
b510888f
NF		 2322 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2323 }
ea22d51a 2324
b510888f 2325 kfree(adapter->rx_scrq);
ea22d51a
TF		 2326 adapter->rx_scrq = NULL;
2327 }
ea22d51a
TF		 2328}
2329
032c5e82
TF		 2330static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2331 struct ibmvnic_sub_crq_queue *scrq)
2332{
2333 struct device *dev = &adapter->vdev->dev;
2334 unsigned long rc;
2335
2336 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2337 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2338 if (rc)
2339 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2340 scrq->hw_irq, rc);
2341 return rc;
2342}
2343
2344static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2345 struct ibmvnic_sub_crq_queue *scrq)
2346{
2347 struct device *dev = &adapter->vdev->dev;
2348 unsigned long rc;
2349
2350 if (scrq->hw_irq > 0x100000000ULL) {
2351 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2352 return 1;
2353 }
2354
2355 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2356 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2357 if (rc)
2358 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2359 scrq->hw_irq, rc);
2360 return rc;
2361}
2362
2363static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2364 struct ibmvnic_sub_crq_queue *scrq)
2365{
2366 struct device *dev = &adapter->vdev->dev;
2367 struct ibmvnic_tx_buff *txbuff;
2368 union sub_crq *next;
2369 int index;
2370 int i, j;
ad7775dc 2371 u8 first;
032c5e82
TF		 2372
2373restart_loop:
2374 while (pending_scrq(adapter, scrq)) {
2375 unsigned int pool = scrq->pool_index;
2376
2377 next = ibmvnic_next_scrq(adapter, scrq);
2378 for (i = 0; i < next->tx_comp.num_comps; i++) {
2379 if (next->tx_comp.rcs[i]) {
2380 dev_err(dev, "tx error %x\n",
2381 next->tx_comp.rcs[i]);
2382 continue;
2383 }
2384 index = be32_to_cpu(next->tx_comp.correlators[i]);
2385 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2386
2387 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2388 if (!txbuff->data_dma[j])
2389 continue;
2390
2391 txbuff->data_dma[j] = 0;
032c5e82 2392 }
ad7775dc
TF		 2393 /* if sub_crq was sent indirectly */
2394 first = txbuff->indir_arr[0].generic.first;
2395 if (first == IBMVNIC_CRQ_CMD) {
2396 dma_unmap_single(dev, txbuff->indir_dma,
2397 sizeof(txbuff->indir_arr),
2398 DMA_TO_DEVICE);
2399 }
032c5e82 2400
142c0ac4 2401 if (txbuff->last_frag) {
032c5e82 2402 dev_kfree_skb_any(txbuff->skb);
7c3e7de3 2403 txbuff->skb = NULL;
142c0ac4 2404 }
032c5e82
TF		 2405
2406 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2407 producer_index] = index;
2408 adapter->tx_pool[pool].producer_index =
2409 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 2410 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 2411 }
2412 /* remove tx_comp scrq*/
2413 next->tx_comp.first = 0;
7c3e7de3
NF		 2414
2415 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2416 (adapter->req_tx_entries_per_subcrq / 2) &&
2417 __netif_subqueue_stopped(adapter->netdev,
2418 scrq->pool_index)) {
2419 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2420 netdev_info(adapter->netdev, "Started queue %d\n",
2421 scrq->pool_index);
2422 }
032c5e82
TF		 2423 }
2424
2425 enable_scrq_irq(adapter, scrq);
2426
2427 if (pending_scrq(adapter, scrq)) {
2428 disable_scrq_irq(adapter, scrq);
2429 goto restart_loop;
2430 }
2431
2432 return 0;
2433}
2434
2435static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2436{
2437 struct ibmvnic_sub_crq_queue *scrq = instance;
2438 struct ibmvnic_adapter *adapter = scrq->adapter;
2439
2440 disable_scrq_irq(adapter, scrq);
2441 ibmvnic_complete_tx(adapter, scrq);
2442
2443 return IRQ_HANDLED;
2444}
2445
2446static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2447{
2448 struct ibmvnic_sub_crq_queue *scrq = instance;
2449 struct ibmvnic_adapter *adapter = scrq->adapter;
2450
3d52b594
JA		 2451 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2452
032c5e82
TF		 2453 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2454 disable_scrq_irq(adapter, scrq);
2455 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2456 }
2457
2458 return IRQ_HANDLED;
2459}
2460
ea22d51a
TF		 2461static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2462{
2463 struct device *dev = &adapter->vdev->dev;
2464 struct ibmvnic_sub_crq_queue *scrq;
2465 int i = 0, j = 0;
2466 int rc = 0;
2467
2468 for (i = 0; i < adapter->req_tx_queues; i++) {
d1cf33d9
NF		 2469 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2470 i);
ea22d51a
TF		 2471 scrq = adapter->tx_scrq[i];
2472 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2473
99c1790e 2474 if (!scrq->irq) {
ea22d51a
TF		 2475 rc = -EINVAL;
2476 dev_err(dev, "Error mapping irq\n");
2477 goto req_tx_irq_failed;
2478 }
2479
2480 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2481 0, "ibmvnic_tx", scrq);
2482
2483 if (rc) {
2484 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2485 scrq->irq, rc);
2486 irq_dispose_mapping(scrq->irq);
2487 goto req_rx_irq_failed;
2488 }
2489 }
2490
2491 for (i = 0; i < adapter->req_rx_queues; i++) {
d1cf33d9
NF		 2492 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2493 i);
ea22d51a
TF		 2494 scrq = adapter->rx_scrq[i];
2495 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 2496 if (!scrq->irq) {
ea22d51a
TF		 2497 rc = -EINVAL;
2498 dev_err(dev, "Error mapping irq\n");
2499 goto req_rx_irq_failed;
2500 }
2501 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2502 0, "ibmvnic_rx", scrq);
2503 if (rc) {
2504 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2505 scrq->irq, rc);
2506 irq_dispose_mapping(scrq->irq);
2507 goto req_rx_irq_failed;
2508 }
2509 }
2510 return rc;
2511
2512req_rx_irq_failed:
8bf371e6 2513 for (j = 0; j < i; j++) {
ea22d51a
TF		 2514 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2515 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2516 }
ea22d51a
TF		 2517 i = adapter->req_tx_queues;
2518req_tx_irq_failed:
8bf371e6 2519 for (j = 0; j < i; j++) {
ea22d51a
TF		 2520 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2521 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 2522 }
b510888f 2523 release_sub_crqs(adapter);
ea22d51a
TF		 2524 return rc;
2525}
2526
d346b9bc 2527static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 2528{
2529 struct device *dev = &adapter->vdev->dev;
2530 struct ibmvnic_sub_crq_queue **allqueues;
2531 int registered_queues = 0;
032c5e82
TF		 2532 int total_queues;
2533 int more = 0;
ea22d51a 2534 int i;
032c5e82 2535
032c5e82
TF		 2536 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2537
1bb3c739 2538 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 2539 if (!allqueues)
d346b9bc 2540 return -1;
032c5e82
TF		 2541
2542 for (i = 0; i < total_queues; i++) {
2543 allqueues[i] = init_sub_crq_queue(adapter);
2544 if (!allqueues[i]) {
2545 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2546 break;
2547 }
2548 registered_queues++;
2549 }
2550
2551 /* Make sure we were able to register the minimum number of queues */
2552 if (registered_queues <
2553 adapter->min_tx_queues + adapter->min_rx_queues) {
2554 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2555 goto tx_failed;
2556 }
2557
2558 /* Distribute the failed allocated queues*/
2559 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2560 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2561 switch (i % 3) {
2562 case 0:
2563 if (adapter->req_rx_queues > adapter->min_rx_queues)
2564 adapter->req_rx_queues--;
2565 else
2566 more++;
2567 break;
2568 case 1:
2569 if (adapter->req_tx_queues > adapter->min_tx_queues)
2570 adapter->req_tx_queues--;
2571 else
2572 more++;
2573 break;
2574 }
2575 }
2576
2577 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 2578 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 2579 if (!adapter->tx_scrq)
2580 goto tx_failed;
2581
2582 for (i = 0; i < adapter->req_tx_queues; i++) {
2583 adapter->tx_scrq[i] = allqueues[i];
2584 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 2585 }
2586
2587 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 2588 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 2589 if (!adapter->rx_scrq)
2590 goto rx_failed;
2591
2592 for (i = 0; i < adapter->req_rx_queues; i++) {
2593 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2594 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 2595 }
2596
d346b9bc
NF		 2597 kfree(allqueues);
2598 return 0;
2599
2600rx_failed:
2601 kfree(adapter->tx_scrq);
2602 adapter->tx_scrq = NULL;
2603tx_failed:
2604 for (i = 0; i < registered_queues; i++)
2605 release_sub_crq_queue(adapter, allqueues[i]);
2606 kfree(allqueues);
2607 return -1;
2608}
2609
2610static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2611{
2612 struct device *dev = &adapter->vdev->dev;
2613 union ibmvnic_crq crq;
c26eba03 2614 int max_entries;
d346b9bc
NF		 2615
2616 if (!retry) {
2617 /* Sub-CRQ entries are 32 byte long */
2618 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2619
2620 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2621 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2622 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2623 return;
2624 }
2625
c26eba03
JA		 2626 if (adapter->desired.mtu)
2627 adapter->req_mtu = adapter->desired.mtu;
2628 else
2629 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2630
2631 if (!adapter->desired.tx_entries)
2632 adapter->desired.tx_entries =
2633 adapter->max_tx_entries_per_subcrq;
2634 if (!adapter->desired.rx_entries)
2635 adapter->desired.rx_entries =
2636 adapter->max_rx_add_entries_per_subcrq;
2637
2638 max_entries = IBMVNIC_MAX_LTB_SIZE /
2639 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2640
2641 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2642 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2643 adapter->desired.tx_entries = max_entries;
2644 }
d346b9bc 2645
c26eba03
JA		 2646 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2647 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2648 adapter->desired.rx_entries = max_entries;
2649 }
2650
2651 if (adapter->desired.tx_entries)
2652 adapter->req_tx_entries_per_subcrq =
2653 adapter->desired.tx_entries;
2654 else
2655 adapter->req_tx_entries_per_subcrq =
2656 adapter->max_tx_entries_per_subcrq;
2657
2658 if (adapter->desired.rx_entries)
2659 adapter->req_rx_add_entries_per_subcrq =
2660 adapter->desired.rx_entries;
2661 else
2662 adapter->req_rx_add_entries_per_subcrq =
2663 adapter->max_rx_add_entries_per_subcrq;
2664
2665 if (adapter->desired.tx_queues)
2666 adapter->req_tx_queues =
2667 adapter->desired.tx_queues;
2668 else
2669 adapter->req_tx_queues =
2670 adapter->opt_tx_comp_sub_queues;
2671
2672 if (adapter->desired.rx_queues)
2673 adapter->req_rx_queues =
2674 adapter->desired.rx_queues;
2675 else
2676 adapter->req_rx_queues =
2677 adapter->opt_rx_comp_queues;
2678
2679 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
d346b9bc
NF		 2680 }
2681
032c5e82
TF		 2682 memset(&crq, 0, sizeof(crq));
2683 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2684 crq.request_capability.cmd = REQUEST_CAPABILITY;
2685
2686 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2687 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2688 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2689 ibmvnic_send_crq(adapter, &crq);
2690
2691 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2692 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2693 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2694 ibmvnic_send_crq(adapter, &crq);
2695
2696 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2697 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2698 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2699 ibmvnic_send_crq(adapter, &crq);
2700
2701 crq.request_capability.capability =
2702 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2703 crq.request_capability.number =
de89e854 2704 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2705 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2706 ibmvnic_send_crq(adapter, &crq);
2707
2708 crq.request_capability.capability =
2709 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2710 crq.request_capability.number =
de89e854 2711 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2712 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2713 ibmvnic_send_crq(adapter, &crq);
2714
2715 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2716 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2717 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2718 ibmvnic_send_crq(adapter, &crq);
2719
2720 if (adapter->netdev->flags & IFF_PROMISC) {
2721 if (adapter->promisc_supported) {
2722 crq.request_capability.capability =
2723 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2724 crq.request_capability.number = cpu_to_be64(1);
901e040a 2725 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2726 ibmvnic_send_crq(adapter, &crq);
2727 }
2728 } else {
2729 crq.request_capability.capability =
2730 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2731 crq.request_capability.number = cpu_to_be64(0);
901e040a 2732 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2733 ibmvnic_send_crq(adapter, &crq);
2734 }
032c5e82
TF		 2735}
2736
2737static int pending_scrq(struct ibmvnic_adapter *adapter,
2738 struct ibmvnic_sub_crq_queue *scrq)
2739{
2740 union sub_crq *entry = &scrq->msgs[scrq->cur];
2741
1cf9cc72 2742 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
032c5e82
TF		 2743 return 1;
2744 else
2745 return 0;
2746}
2747
2748static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2749 struct ibmvnic_sub_crq_queue *scrq)
2750{
2751 union sub_crq *entry;
2752 unsigned long flags;
2753
2754 spin_lock_irqsave(&scrq->lock, flags);
2755 entry = &scrq->msgs[scrq->cur];
2756 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2757 if (++scrq->cur == scrq->size)
2758 scrq->cur = 0;
2759 } else {
2760 entry = NULL;
2761 }
2762 spin_unlock_irqrestore(&scrq->lock, flags);
2763
2764 return entry;
2765}
2766
2767static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2768{
2769 struct ibmvnic_crq_queue *queue = &adapter->crq;
2770 union ibmvnic_crq *crq;
2771
2772 crq = &queue->msgs[queue->cur];
2773 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2774 if (++queue->cur == queue->size)
2775 queue->cur = 0;
2776 } else {
2777 crq = NULL;
2778 }
2779
2780 return crq;
2781}
2782
2783static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2784 union sub_crq *sub_crq)
2785{
2786 unsigned int ua = adapter->vdev->unit_address;
2787 struct device *dev = &adapter->vdev->dev;
2788 u64 *u64_crq = (u64 *)sub_crq;
2789 int rc;
2790
2791 netdev_dbg(adapter->netdev,
2792 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2793 (unsigned long int)cpu_to_be64(remote_handle),
2794 (unsigned long int)cpu_to_be64(u64_crq[0]),
2795 (unsigned long int)cpu_to_be64(u64_crq[1]),
2796 (unsigned long int)cpu_to_be64(u64_crq[2]),
2797 (unsigned long int)cpu_to_be64(u64_crq[3]));
2798
2799 /* Make sure the hypervisor sees the complete request */
2800 mb();
2801
2802 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2803 cpu_to_be64(remote_handle),
2804 cpu_to_be64(u64_crq[0]),
2805 cpu_to_be64(u64_crq[1]),
2806 cpu_to_be64(u64_crq[2]),
2807 cpu_to_be64(u64_crq[3]));
2808
2809 if (rc) {
2810 if (rc == H_CLOSED)
2811 dev_warn(dev, "CRQ Queue closed\n");
2812 dev_err(dev, "Send error (rc=%d)\n", rc);
2813 }
2814
2815 return rc;
2816}
2817
ad7775dc
TF		 2818static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2819 u64 remote_handle, u64 ioba, u64 num_entries)
2820{
2821 unsigned int ua = adapter->vdev->unit_address;
2822 struct device *dev = &adapter->vdev->dev;
2823 int rc;
2824
2825 /* Make sure the hypervisor sees the complete request */
2826 mb();
2827 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2828 cpu_to_be64(remote_handle),
2829 ioba, num_entries);
2830
2831 if (rc) {
2832 if (rc == H_CLOSED)
2833 dev_warn(dev, "CRQ Queue closed\n");
2834 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2835 }
2836
2837 return rc;
2838}
2839
032c5e82
TF		 2840static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2841 union ibmvnic_crq *crq)
2842{
2843 unsigned int ua = adapter->vdev->unit_address;
2844 struct device *dev = &adapter->vdev->dev;
2845 u64 *u64_crq = (u64 *)crq;
2846 int rc;
2847
2848 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2849 (unsigned long int)cpu_to_be64(u64_crq[0]),
2850 (unsigned long int)cpu_to_be64(u64_crq[1]));
2851
2852 /* Make sure the hypervisor sees the complete request */
2853 mb();
2854
2855 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2856 cpu_to_be64(u64_crq[0]),
2857 cpu_to_be64(u64_crq[1]));
2858
2859 if (rc) {
2860 if (rc == H_CLOSED)
2861 dev_warn(dev, "CRQ Queue closed\n");
2862 dev_warn(dev, "Send error (rc=%d)\n", rc);
2863 }
2864
2865 return rc;
2866}
2867
2868static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2869{
2870 union ibmvnic_crq crq;
2871
2872 memset(&crq, 0, sizeof(crq));
2873 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2874 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2875 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2876
2877 return ibmvnic_send_crq(adapter, &crq);
2878}
2879
032c5e82
TF		 2880static int send_version_xchg(struct ibmvnic_adapter *adapter)
2881{
2882 union ibmvnic_crq crq;
2883
2884 memset(&crq, 0, sizeof(crq));
2885 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2886 crq.version_exchange.cmd = VERSION_EXCHANGE;
2887 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2888
2889 return ibmvnic_send_crq(adapter, &crq);
2890}
2891
37798d02
NF		 2892struct vnic_login_client_data {
2893 u8 type;
2894 __be16 len;
2895 char name;
2896} __packed;
2897
2898static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2899{
2900 int len;
2901
2902 /* Calculate the amount of buffer space needed for the
2903 * vnic client data in the login buffer. There are four entries,
2904 * OS name, LPAR name, device name, and a null last entry.
2905 */
2906 len = 4 * sizeof(struct vnic_login_client_data);
2907 len += 6; /* "Linux" plus NULL */
2908 len += strlen(utsname()->nodename) + 1;
2909 len += strlen(adapter->netdev->name) + 1;
2910
2911 return len;
2912}
2913
2914static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2915 struct vnic_login_client_data *vlcd)
2916{
2917 const char *os_name = "Linux";
2918 int len;
2919
2920 /* Type 1 - LPAR OS */
2921 vlcd->type = 1;
2922 len = strlen(os_name) + 1;
2923 vlcd->len = cpu_to_be16(len);
2924 strncpy(&vlcd->name, os_name, len);
2925 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2926
2927 /* Type 2 - LPAR name */
2928 vlcd->type = 2;
2929 len = strlen(utsname()->nodename) + 1;
2930 vlcd->len = cpu_to_be16(len);
2931 strncpy(&vlcd->name, utsname()->nodename, len);
2932 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2933
2934 /* Type 3 - device name */
2935 vlcd->type = 3;
2936 len = strlen(adapter->netdev->name) + 1;
2937 vlcd->len = cpu_to_be16(len);
2938 strncpy(&vlcd->name, adapter->netdev->name, len);
2939}
2940
032c5e82
TF		 2941static void send_login(struct ibmvnic_adapter *adapter)
2942{
2943 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2944 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2945 struct device *dev = &adapter->vdev->dev;
2946 dma_addr_t rsp_buffer_token;
2947 dma_addr_t buffer_token;
2948 size_t rsp_buffer_size;
2949 union ibmvnic_crq crq;
032c5e82
TF		 2950 size_t buffer_size;
2951 __be64 *tx_list_p;
2952 __be64 *rx_list_p;
37798d02
NF		 2953 int client_data_len;
2954 struct vnic_login_client_data *vlcd;
032c5e82
TF		 2955 int i;
2956
37798d02
NF		 2957 client_data_len = vnic_client_data_len(adapter);
2958
032c5e82
TF		 2959 buffer_size =
2960 sizeof(struct ibmvnic_login_buffer) +
37798d02
NF		 2961 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
2962 client_data_len;
032c5e82 2963
37798d02 2964 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
032c5e82
TF		 2965 if (!login_buffer)
2966 goto buf_alloc_failed;
2967
2968 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2969 DMA_TO_DEVICE);
2970 if (dma_mapping_error(dev, buffer_token)) {
2971 dev_err(dev, "Couldn't map login buffer\n");
2972 goto buf_map_failed;
2973 }
2974
498cd8e4
JA		 2975 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2976 sizeof(u64) * adapter->req_tx_queues +
2977 sizeof(u64) * adapter->req_rx_queues +
2978 sizeof(u64) * adapter->req_rx_queues +
2979 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2980
2981 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2982 if (!login_rsp_buffer)
2983 goto buf_rsp_alloc_failed;
2984
2985 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2986 rsp_buffer_size, DMA_FROM_DEVICE);
2987 if (dma_mapping_error(dev, rsp_buffer_token)) {
2988 dev_err(dev, "Couldn't map login rsp buffer\n");
2989 goto buf_rsp_map_failed;
2990 }
661a2622 2991
032c5e82
TF		 2992 adapter->login_buf = login_buffer;
2993 adapter->login_buf_token = buffer_token;
2994 adapter->login_buf_sz = buffer_size;
2995 adapter->login_rsp_buf = login_rsp_buffer;
2996 adapter->login_rsp_buf_token = rsp_buffer_token;
2997 adapter->login_rsp_buf_sz = rsp_buffer_size;
2998
2999 login_buffer->len = cpu_to_be32(buffer_size);
3000 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3001 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3002 login_buffer->off_txcomp_subcrqs =
3003 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3004 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3005 login_buffer->off_rxcomp_subcrqs =
3006 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3007 sizeof(u64) * adapter->req_tx_queues);
3008 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3009 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3010
3011 tx_list_p = (__be64 *)((char *)login_buffer +
3012 sizeof(struct ibmvnic_login_buffer));
3013 rx_list_p = (__be64 *)((char *)login_buffer +
3014 sizeof(struct ibmvnic_login_buffer) +
3015 sizeof(u64) * adapter->req_tx_queues);
3016
3017 for (i = 0; i < adapter->req_tx_queues; i++) {
3018 if (adapter->tx_scrq[i]) {
3019 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3020 crq_num);
3021 }
3022 }
3023
3024 for (i = 0; i < adapter->req_rx_queues; i++) {
3025 if (adapter->rx_scrq[i]) {
3026 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3027 crq_num);
3028 }
3029 }
3030
37798d02
NF		 3031 /* Insert vNIC login client data */
3032 vlcd = (struct vnic_login_client_data *)
3033 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3034 login_buffer->client_data_offset =
3035 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3036 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3037
3038 vnic_add_client_data(adapter, vlcd);
3039
032c5e82
TF		 3040 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3041 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3042 netdev_dbg(adapter->netdev, "%016lx\n",
3043 ((unsigned long int *)(adapter->login_buf))[i]);
3044 }
3045
3046 memset(&crq, 0, sizeof(crq));
3047 crq.login.first = IBMVNIC_CRQ_CMD;
3048 crq.login.cmd = LOGIN;
3049 crq.login.ioba = cpu_to_be32(buffer_token);
3050 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 3051 ibmvnic_send_crq(adapter, &crq);
3052
3053 return;
3054
032c5e82
TF		 3055buf_rsp_map_failed:
3056 kfree(login_rsp_buffer);
3057buf_rsp_alloc_failed:
3058 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3059buf_map_failed:
3060 kfree(login_buffer);
3061buf_alloc_failed:
3062 return;
3063}
3064
3065static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3066 u32 len, u8 map_id)
3067{
3068 union ibmvnic_crq crq;
3069
3070 memset(&crq, 0, sizeof(crq));
3071 crq.request_map.first = IBMVNIC_CRQ_CMD;
3072 crq.request_map.cmd = REQUEST_MAP;
3073 crq.request_map.map_id = map_id;
3074 crq.request_map.ioba = cpu_to_be32(addr);
3075 crq.request_map.len = cpu_to_be32(len);
3076 ibmvnic_send_crq(adapter, &crq);
3077}
3078
3079static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3080{
3081 union ibmvnic_crq crq;
3082
3083 memset(&crq, 0, sizeof(crq));
3084 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3085 crq.request_unmap.cmd = REQUEST_UNMAP;
3086 crq.request_unmap.map_id = map_id;
3087 ibmvnic_send_crq(adapter, &crq);
3088}
3089
3090static void send_map_query(struct ibmvnic_adapter *adapter)
3091{
3092 union ibmvnic_crq crq;
3093
3094 memset(&crq, 0, sizeof(crq));
3095 crq.query_map.first = IBMVNIC_CRQ_CMD;
3096 crq.query_map.cmd = QUERY_MAP;
3097 ibmvnic_send_crq(adapter, &crq);
3098}
3099
3100/* Send a series of CRQs requesting various capabilities of the VNIC server */
3101static void send_cap_queries(struct ibmvnic_adapter *adapter)
3102{
3103 union ibmvnic_crq crq;
3104
901e040a 3105 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 3106 memset(&crq, 0, sizeof(crq));
3107 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3108 crq.query_capability.cmd = QUERY_CAPABILITY;
3109
3110 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 3111 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3112 ibmvnic_send_crq(adapter, &crq);
3113
3114 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 3115 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3116 ibmvnic_send_crq(adapter, &crq);
3117
3118 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 3119 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3120 ibmvnic_send_crq(adapter, &crq);
3121
3122 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 3123 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3124 ibmvnic_send_crq(adapter, &crq);
3125
3126 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 3127 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3128 ibmvnic_send_crq(adapter, &crq);
3129
3130 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 3131 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3132 ibmvnic_send_crq(adapter, &crq);
3133
3134 crq.query_capability.capability =
3135 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 3136 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3137 ibmvnic_send_crq(adapter, &crq);
3138
3139 crq.query_capability.capability =
3140 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3141 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3142 ibmvnic_send_crq(adapter, &crq);
3143
3144 crq.query_capability.capability =
3145 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 3146 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3147 ibmvnic_send_crq(adapter, &crq);
3148
3149 crq.query_capability.capability =
3150 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 3151 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3152 ibmvnic_send_crq(adapter, &crq);
3153
3154 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 3155 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3156 ibmvnic_send_crq(adapter, &crq);
3157
3158 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 3159 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3160 ibmvnic_send_crq(adapter, &crq);
3161
3162 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 3163 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3164 ibmvnic_send_crq(adapter, &crq);
3165
3166 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 3167 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3168 ibmvnic_send_crq(adapter, &crq);
3169
3170 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 3171 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3172 ibmvnic_send_crq(adapter, &crq);
3173
3174 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 3175 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3176 ibmvnic_send_crq(adapter, &crq);
3177
6052d5e2
MFV		 3178 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3179 atomic_inc(&adapter->running_cap_crqs);
3180 ibmvnic_send_crq(adapter, &crq);
3181
032c5e82 3182 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 3183 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3184 ibmvnic_send_crq(adapter, &crq);
3185
3186 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 3187 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3188 ibmvnic_send_crq(adapter, &crq);
3189
3190 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 3191 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3192 ibmvnic_send_crq(adapter, &crq);
3193
3194 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 3195 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3196 ibmvnic_send_crq(adapter, &crq);
3197
3198 crq.query_capability.capability =
3199 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 3200 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3201 ibmvnic_send_crq(adapter, &crq);
3202
3203 crq.query_capability.capability =
3204 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 3205 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3206 ibmvnic_send_crq(adapter, &crq);
3207
3208 crq.query_capability.capability =
3209 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 3210 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3211 ibmvnic_send_crq(adapter, &crq);
3212
3213 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 3214 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 3215 ibmvnic_send_crq(adapter, &crq);
3216}
3217
4e6759be
DANR		 3218static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3219 struct ibmvnic_adapter *adapter)
3220{
3221 struct device *dev = &adapter->vdev->dev;
3222
3223 if (crq->get_vpd_size_rsp.rc.code) {
3224 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3225 crq->get_vpd_size_rsp.rc.code);
3226 complete(&adapter->fw_done);
3227 return;
3228 }
3229
3230 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3231 complete(&adapter->fw_done);
3232}
3233
3234static void handle_vpd_rsp(union ibmvnic_crq *crq,
3235 struct ibmvnic_adapter *adapter)
3236{
3237 struct device *dev = &adapter->vdev->dev;
3238 unsigned char *substr = NULL, *ptr = NULL;
3239 u8 fw_level_len = 0;
3240
3241 memset(adapter->fw_version, 0, 32);
3242
3243 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3244 DMA_FROM_DEVICE);
3245
3246 if (crq->get_vpd_rsp.rc.code) {
3247 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3248 crq->get_vpd_rsp.rc.code);
3249 goto complete;
3250 }
3251
3252 /* get the position of the firmware version info
3253 * located after the ASCII 'RM' substring in the buffer
3254 */
3255 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3256 if (!substr) {
3257 dev_info(dev, "No FW level provided by VPD\n");
3258 goto complete;
3259 }
3260
3261 /* get length of firmware level ASCII substring */
3262 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3263 fw_level_len = *(substr + 2);
3264 } else {
3265 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3266 goto complete;
3267 }
3268
3269 /* copy firmware version string from vpd into adapter */
3270 if ((substr + 3 + fw_level_len) <
3271 (adapter->vpd->buff + adapter->vpd->len)) {
3272 ptr = strncpy((char *)adapter->fw_version,
3273 substr + 3, fw_level_len);
3274
3275 if (!ptr)
3276 dev_err(dev, "Failed to isolate FW level string\n");
3277 } else {
3278 dev_info(dev, "FW substr extrapolated VPD buff\n");
3279 }
3280
3281complete:
3282 complete(&adapter->fw_done);
3283}
3284
032c5e82
TF		 3285static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3286{
3287 struct device *dev = &adapter->vdev->dev;
3288 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3289 union ibmvnic_crq crq;
3290 int i;
3291
3292 dma_unmap_single(dev, adapter->ip_offload_tok,
3293 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3294
3295 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3296 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3297 netdev_dbg(adapter->netdev, "%016lx\n",
3298 ((unsigned long int *)(buf))[i]);
3299
3300 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3301 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3302 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3303 buf->tcp_ipv4_chksum);
3304 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3305 buf->tcp_ipv6_chksum);
3306 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3307 buf->udp_ipv4_chksum);
3308 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3309 buf->udp_ipv6_chksum);
3310 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3311 buf->large_tx_ipv4);
3312 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3313 buf->large_tx_ipv6);
3314 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3315 buf->large_rx_ipv4);
3316 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3317 buf->large_rx_ipv6);
3318 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3319 buf->max_ipv4_header_size);
3320 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3321 buf->max_ipv6_header_size);
3322 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3323 buf->max_tcp_header_size);
3324 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3325 buf->max_udp_header_size);
3326 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3327 buf->max_large_tx_size);
3328 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3329 buf->max_large_rx_size);
3330 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3331 buf->ipv6_extension_header);
3332 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3333 buf->tcp_pseudosum_req);
3334 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3335 buf->num_ipv6_ext_headers);
3336 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3337 buf->off_ipv6_ext_headers);
3338
3339 adapter->ip_offload_ctrl_tok =
3340 dma_map_single(dev, &adapter->ip_offload_ctrl,
3341 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3342
3343 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3344 dev_err(dev, "Couldn't map ip offload control buffer\n");
3345 return;
3346 }
3347
3348 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3349 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3350 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3351 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3352 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
fdb06105
TF		 3353 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3354 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
032c5e82 3355
fdb06105 3356 /* large_rx disabled for now, additional features needed */
032c5e82
TF		 3357 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3358 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3359
15482056 3360 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
032c5e82
TF		 3361
3362 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3363 adapter->netdev->features |= NETIF_F_IP_CSUM;
3364
3365 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3366 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3367
9be02cdf
TF		 3368 if ((adapter->netdev->features &
3369 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3370 adapter->netdev->features |= NETIF_F_RXCSUM;
3371
fdb06105
TF		 3372 if (buf->large_tx_ipv4)
3373 adapter->netdev->features |= NETIF_F_TSO;
3374 if (buf->large_tx_ipv6)
3375 adapter->netdev->features |= NETIF_F_TSO6;
3376
aa0bf851
TF		 3377 adapter->netdev->hw_features |= adapter->netdev->features;
3378
032c5e82
TF		 3379 memset(&crq, 0, sizeof(crq));
3380 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3381 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3382 crq.control_ip_offload.len =
3383 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3384 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3385 ibmvnic_send_crq(adapter, &crq);
3386}
3387
3388static void handle_error_info_rsp(union ibmvnic_crq *crq,
3389 struct ibmvnic_adapter *adapter)
3390{
3391 struct device *dev = &adapter->vdev->dev;
96183182 3392 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 3393 unsigned long flags;
3394 bool found = false;
3395 int i;
3396
3397 if (!crq->request_error_rsp.rc.code) {
3398 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3399 crq->request_error_rsp.rc.code);
3400 return;
3401 }
3402
3403 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 3404 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 3405 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3406 found = true;
3407 list_del(&error_buff->list);
3408 break;
3409 }
3410 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3411
3412 if (!found) {
3413 dev_err(dev, "Couldn't find error id %x\n",
75224c93 3414 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3415 return;
3416 }
3417
3418 dev_err(dev, "Detailed info for error id %x:",
75224c93 3419 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 3420
3421 for (i = 0; i < error_buff->len; i++) {
3422 pr_cont("%02x", (int)error_buff->buff[i]);
3423 if (i % 8 == 7)
3424 pr_cont(" ");
3425 }
3426 pr_cont("\n");
3427
3428 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3429 DMA_FROM_DEVICE);
3430 kfree(error_buff->buff);
3431 kfree(error_buff);
3432}
3433
2f9de9ba
NF		 3434static void request_error_information(struct ibmvnic_adapter *adapter,
3435 union ibmvnic_crq *err_crq)
032c5e82 3436{
032c5e82 3437 struct device *dev = &adapter->vdev->dev;
2f9de9ba 3438 struct net_device *netdev = adapter->netdev;
032c5e82 3439 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 3440 unsigned long timeout = msecs_to_jiffies(30000);
3441 union ibmvnic_crq crq;
032c5e82 3442 unsigned long flags;
2f9de9ba 3443 int rc, detail_len;
032c5e82
TF		 3444
3445 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3446 if (!error_buff)
3447 return;
3448
2f9de9ba 3449 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 3450 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3451 if (!error_buff->buff) {
3452 kfree(error_buff);
3453 return;
3454 }
3455
3456 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3457 DMA_FROM_DEVICE);
3458 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 3459 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 3460 kfree(error_buff->buff);
3461 kfree(error_buff);
3462 return;
3463 }
3464
032c5e82 3465 error_buff->len = detail_len;
2f9de9ba 3466 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 3467
3468 spin_lock_irqsave(&adapter->error_list_lock, flags);
3469 list_add_tail(&error_buff->list, &adapter->errors);
3470 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3471
2f9de9ba
NF		 3472 memset(&crq, 0, sizeof(crq));
3473 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3474 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3475 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3476 crq.request_error_info.len = cpu_to_be32(detail_len);
3477 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3478
3479 rc = ibmvnic_send_crq(adapter, &crq);
3480 if (rc) {
3481 netdev_err(netdev, "failed to request error information\n");
3482 goto err_info_fail;
3483 }
3484
3485 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3486 netdev_err(netdev, "timeout waiting for error information\n");
3487 goto err_info_fail;
3488 }
3489
3490 return;
3491
3492err_info_fail:
3493 spin_lock_irqsave(&adapter->error_list_lock, flags);
3494 list_del(&error_buff->list);
3495 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3496
3497 kfree(error_buff->buff);
3498 kfree(error_buff);
3499}
3500
3501static void handle_error_indication(union ibmvnic_crq *crq,
3502 struct ibmvnic_adapter *adapter)
3503{
3504 struct device *dev = &adapter->vdev->dev;
3505
3506 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3507 crq->error_indication.flags
3508 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3509 be32_to_cpu(crq->error_indication.error_id),
3510 be16_to_cpu(crq->error_indication.error_cause));
3511
3512 if (be32_to_cpu(crq->error_indication.error_id))
3513 request_error_information(adapter, crq);
ed651a10
NF		 3514
3515 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3516 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
8cb31cfc
JA		 3517 else
3518 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
032c5e82
TF		 3519}
3520
3521static void handle_change_mac_rsp(union ibmvnic_crq *crq,
3522 struct ibmvnic_adapter *adapter)
3523{
3524 struct net_device *netdev = adapter->netdev;
3525 struct device *dev = &adapter->vdev->dev;
3526 long rc;
3527
3528 rc = crq->change_mac_addr_rsp.rc.code;
3529 if (rc) {
3530 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3531 return;
3532 }
3533 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3534 ETH_ALEN);
3535}
3536
3537static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3538 struct ibmvnic_adapter *adapter)
3539{
3540 struct device *dev = &adapter->vdev->dev;
3541 u64 *req_value;
3542 char *name;
3543
901e040a 3544 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 3545 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3546 case REQ_TX_QUEUES:
3547 req_value = &adapter->req_tx_queues;
3548 name = "tx";
3549 break;
3550 case REQ_RX_QUEUES:
3551 req_value = &adapter->req_rx_queues;
3552 name = "rx";
3553 break;
3554 case REQ_RX_ADD_QUEUES:
3555 req_value = &adapter->req_rx_add_queues;
3556 name = "rx_add";
3557 break;
3558 case REQ_TX_ENTRIES_PER_SUBCRQ:
3559 req_value = &adapter->req_tx_entries_per_subcrq;
3560 name = "tx_entries_per_subcrq";
3561 break;
3562 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3563 req_value = &adapter->req_rx_add_entries_per_subcrq;
3564 name = "rx_add_entries_per_subcrq";
3565 break;
3566 case REQ_MTU:
3567 req_value = &adapter->req_mtu;
3568 name = "mtu";
3569 break;
3570 case PROMISC_REQUESTED:
3571 req_value = &adapter->promisc;
3572 name = "promisc";
3573 break;
3574 default:
3575 dev_err(dev, "Got invalid cap request rsp %d\n",
3576 crq->request_capability.capability);
3577 return;
3578 }
3579
3580 switch (crq->request_capability_rsp.rc.code) {
3581 case SUCCESS:
3582 break;
3583 case PARTIALSUCCESS:
3584 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3585 *req_value,
28f4d165 3586 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 3587 number), name);
28f4d165 3588 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 3589 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 3590 return;
3591 default:
3592 dev_err(dev, "Error %d in request cap rsp\n",
3593 crq->request_capability_rsp.rc.code);
3594 return;
3595 }
3596
3597 /* Done receiving requested capabilities, query IP offload support */
901e040a 3598 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 3599 union ibmvnic_crq newcrq;
3600 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3601 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3602 &adapter->ip_offload_buf;
3603
249168ad 3604 adapter->wait_capability = false;
032c5e82
TF		 3605 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3606 buf_sz,
3607 DMA_FROM_DEVICE);
3608
3609 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3610 if (!firmware_has_feature(FW_FEATURE_CMO))
3611 dev_err(dev, "Couldn't map offload buffer\n");
3612 return;
3613 }
3614
3615 memset(&newcrq, 0, sizeof(newcrq));
3616 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3617 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3618 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3619 newcrq.query_ip_offload.ioba =
3620 cpu_to_be32(adapter->ip_offload_tok);
3621
3622 ibmvnic_send_crq(adapter, &newcrq);
3623 }
3624}
3625
3626static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3627 struct ibmvnic_adapter *adapter)
3628{
3629 struct device *dev = &adapter->vdev->dev;
c26eba03 3630 struct net_device *netdev = adapter->netdev;
032c5e82
TF		 3631 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3632 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 3633 int i;
3634
3635 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3636 DMA_BIDIRECTIONAL);
3637 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3638 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3639
498cd8e4
JA		 3640 /* If the number of queues requested can't be allocated by the
3641 * server, the login response will return with code 1. We will need
3642 * to resend the login buffer with fewer queues requested.
3643 */
3644 if (login_rsp_crq->generic.rc.code) {
3645 adapter->renegotiate = true;
3646 complete(&adapter->init_done);
3647 return 0;
3648 }
3649
c26eba03
JA		 3650 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3651
032c5e82
TF		 3652 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3653 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3654 netdev_dbg(adapter->netdev, "%016lx\n",
3655 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3656 }
3657
3658 /* Sanity checks */
3659 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3660 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3661 adapter->req_rx_add_queues !=
3662 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3663 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3664 ibmvnic_remove(adapter->vdev);
3665 return -EIO;
3666 }
3667 complete(&adapter->init_done);
3668
032c5e82
TF		 3669 return 0;
3670}
3671
032c5e82
TF		 3672static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3673 struct ibmvnic_adapter *adapter)
3674{
3675 struct device *dev = &adapter->vdev->dev;
3676 long rc;
3677
3678 rc = crq->request_unmap_rsp.rc.code;
3679 if (rc)
3680 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3681}
3682
3683static void handle_query_map_rsp(union ibmvnic_crq *crq,
3684 struct ibmvnic_adapter *adapter)
3685{
3686 struct net_device *netdev = adapter->netdev;
3687 struct device *dev = &adapter->vdev->dev;
3688 long rc;
3689
3690 rc = crq->query_map_rsp.rc.code;
3691 if (rc) {
3692 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3693 return;
3694 }
3695 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3696 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3697 crq->query_map_rsp.free_pages);
3698}
3699
3700static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3701 struct ibmvnic_adapter *adapter)
3702{
3703 struct net_device *netdev = adapter->netdev;
3704 struct device *dev = &adapter->vdev->dev;
3705 long rc;
3706
901e040a 3707 atomic_dec(&adapter->running_cap_crqs);
032c5e82 3708 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 3709 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 3710 rc = crq->query_capability.rc.code;
3711 if (rc) {
3712 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3713 goto out;
3714 }
3715
3716 switch (be16_to_cpu(crq->query_capability.capability)) {
3717 case MIN_TX_QUEUES:
3718 adapter->min_tx_queues =
de89e854 3719 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3720 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3721 adapter->min_tx_queues);
3722 break;
3723 case MIN_RX_QUEUES:
3724 adapter->min_rx_queues =
de89e854 3725 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3726 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3727 adapter->min_rx_queues);
3728 break;
3729 case MIN_RX_ADD_QUEUES:
3730 adapter->min_rx_add_queues =
de89e854 3731 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3732 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3733 adapter->min_rx_add_queues);
3734 break;
3735 case MAX_TX_QUEUES:
3736 adapter->max_tx_queues =
de89e854 3737 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3738 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3739 adapter->max_tx_queues);
3740 break;
3741 case MAX_RX_QUEUES:
3742 adapter->max_rx_queues =
de89e854 3743 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3744 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3745 adapter->max_rx_queues);
3746 break;
3747 case MAX_RX_ADD_QUEUES:
3748 adapter->max_rx_add_queues =
de89e854 3749 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3750 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3751 adapter->max_rx_add_queues);
3752 break;
3753 case MIN_TX_ENTRIES_PER_SUBCRQ:
3754 adapter->min_tx_entries_per_subcrq =
de89e854 3755 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3756 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3757 adapter->min_tx_entries_per_subcrq);
3758 break;
3759 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3760 adapter->min_rx_add_entries_per_subcrq =
de89e854 3761 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3762 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3763 adapter->min_rx_add_entries_per_subcrq);
3764 break;
3765 case MAX_TX_ENTRIES_PER_SUBCRQ:
3766 adapter->max_tx_entries_per_subcrq =
de89e854 3767 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3768 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3769 adapter->max_tx_entries_per_subcrq);
3770 break;
3771 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3772 adapter->max_rx_add_entries_per_subcrq =
de89e854 3773 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3774 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3775 adapter->max_rx_add_entries_per_subcrq);
3776 break;
3777 case TCP_IP_OFFLOAD:
3778 adapter->tcp_ip_offload =
de89e854 3779 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3780 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3781 adapter->tcp_ip_offload);
3782 break;
3783 case PROMISC_SUPPORTED:
3784 adapter->promisc_supported =
de89e854 3785 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3786 netdev_dbg(netdev, "promisc_supported = %lld\n",
3787 adapter->promisc_supported);
3788 break;
3789 case MIN_MTU:
de89e854 3790 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3791 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3792 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3793 break;
3794 case MAX_MTU:
de89e854 3795 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3796 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3797 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3798 break;
3799 case MAX_MULTICAST_FILTERS:
3800 adapter->max_multicast_filters =
de89e854 3801 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3802 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3803 adapter->max_multicast_filters);
3804 break;
3805 case VLAN_HEADER_INSERTION:
3806 adapter->vlan_header_insertion =
de89e854 3807 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3808 if (adapter->vlan_header_insertion)
3809 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3810 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3811 adapter->vlan_header_insertion);
3812 break;
6052d5e2
MFV		 3813 case RX_VLAN_HEADER_INSERTION:
3814 adapter->rx_vlan_header_insertion =
3815 be64_to_cpu(crq->query_capability.number);
3816 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3817 adapter->rx_vlan_header_insertion);
3818 break;
032c5e82
TF		 3819 case MAX_TX_SG_ENTRIES:
3820 adapter->max_tx_sg_entries =
de89e854 3821 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3822 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3823 adapter->max_tx_sg_entries);
3824 break;
3825 case RX_SG_SUPPORTED:
3826 adapter->rx_sg_supported =
de89e854 3827 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3828 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3829 adapter->rx_sg_supported);
3830 break;
3831 case OPT_TX_COMP_SUB_QUEUES:
3832 adapter->opt_tx_comp_sub_queues =
de89e854 3833 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3834 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3835 adapter->opt_tx_comp_sub_queues);
3836 break;
3837 case OPT_RX_COMP_QUEUES:
3838 adapter->opt_rx_comp_queues =
de89e854 3839 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3840 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3841 adapter->opt_rx_comp_queues);
3842 break;
3843 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3844 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3845 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3846 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3847 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3848 break;
3849 case OPT_TX_ENTRIES_PER_SUBCRQ:
3850 adapter->opt_tx_entries_per_subcrq =
de89e854 3851 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3852 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3853 adapter->opt_tx_entries_per_subcrq);
3854 break;
3855 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3856 adapter->opt_rxba_entries_per_subcrq =
de89e854 3857 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3858 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3859 adapter->opt_rxba_entries_per_subcrq);
3860 break;
3861 case TX_RX_DESC_REQ:
3862 adapter->tx_rx_desc_req = crq->query_capability.number;
3863 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3864 adapter->tx_rx_desc_req);
3865 break;
3866
3867 default:
3868 netdev_err(netdev, "Got invalid cap rsp %d\n",
3869 crq->query_capability.capability);
3870 }
3871
3872out:
249168ad
TF		 3873 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3874 adapter->wait_capability = false;
d346b9bc 3875 ibmvnic_send_req_caps(adapter, 0);
249168ad 3876 }
032c5e82
TF		 3877}
3878
032c5e82
TF		 3879static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3880 struct ibmvnic_adapter *adapter)
3881{
3882 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3883 struct net_device *netdev = adapter->netdev;
3884 struct device *dev = &adapter->vdev->dev;
993a82b0 3885 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3886 long rc;
3887
3888 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3889 (unsigned long int)cpu_to_be64(u64_crq[0]),
3890 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3891 switch (gen_crq->first) {
3892 case IBMVNIC_CRQ_INIT_RSP:
3893 switch (gen_crq->cmd) {
3894 case IBMVNIC_CRQ_INIT:
3895 dev_info(dev, "Partner initialized\n");
017892c1
JA		 3896 adapter->from_passive_init = true;
3897 complete(&adapter->init_done);
032c5e82
TF		 3898 break;
3899 case IBMVNIC_CRQ_INIT_COMPLETE:
3900 dev_info(dev, "Partner initialization complete\n");
3901 send_version_xchg(adapter);
3902 break;
3903 default:
3904 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3905 }
3906 return;
3907 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3908 netif_carrier_off(netdev);
032c5e82 3909 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3910 dev_info(dev, "Migrated, re-enabling adapter\n");
3911 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3912 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3913 dev_info(dev, "Backing device failover detected\n");
ed651a10 3914 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3915 } else {
3916 /* The adapter lost the connection */
3917 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3918 gen_crq->cmd);
ed651a10 3919 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3920 }
3921 return;
3922 case IBMVNIC_CRQ_CMD_RSP:
3923 break;
3924 default:
3925 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3926 gen_crq->first);
3927 return;
3928 }
3929
3930 switch (gen_crq->cmd) {
3931 case VERSION_EXCHANGE_RSP:
3932 rc = crq->version_exchange_rsp.rc.code;
3933 if (rc) {
3934 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3935 break;
3936 }
3937 dev_info(dev, "Partner protocol version is %d\n",
3938 crq->version_exchange_rsp.version);
3939 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3940 ibmvnic_version)
3941 ibmvnic_version =
3942 be16_to_cpu(crq->version_exchange_rsp.version);
3943 send_cap_queries(adapter);
3944 break;
3945 case QUERY_CAPABILITY_RSP:
3946 handle_query_cap_rsp(crq, adapter);
3947 break;
3948 case QUERY_MAP_RSP:
3949 handle_query_map_rsp(crq, adapter);
3950 break;
3951 case REQUEST_MAP_RSP:
f3be0cbc
TF		 3952 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3953 complete(&adapter->fw_done);
032c5e82
TF		 3954 break;
3955 case REQUEST_UNMAP_RSP:
3956 handle_request_unmap_rsp(crq, adapter);
3957 break;
3958 case REQUEST_CAPABILITY_RSP:
3959 handle_request_cap_rsp(crq, adapter);
3960 break;
3961 case LOGIN_RSP:
3962 netdev_dbg(netdev, "Got Login Response\n");
3963 handle_login_rsp(crq, adapter);
3964 break;
3965 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3966 netdev_dbg(netdev,
3967 "Got Logical Link State Response, state: %d rc: %d\n",
3968 crq->logical_link_state_rsp.link_state,
3969 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3970 adapter->logical_link_state =
3971 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3972 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3973 complete(&adapter->init_done);
032c5e82
TF		 3974 break;
3975 case LINK_STATE_INDICATION:
3976 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3977 adapter->phys_link_state =
3978 crq->link_state_indication.phys_link_state;
3979 adapter->logical_link_state =
3980 crq->link_state_indication.logical_link_state;
3981 break;
3982 case CHANGE_MAC_ADDR_RSP:
3983 netdev_dbg(netdev, "Got MAC address change Response\n");
3984 handle_change_mac_rsp(crq, adapter);
3985 break;
3986 case ERROR_INDICATION:
3987 netdev_dbg(netdev, "Got Error Indication\n");
3988 handle_error_indication(crq, adapter);
3989 break;
3990 case REQUEST_ERROR_RSP:
3991 netdev_dbg(netdev, "Got Error Detail Response\n");
3992 handle_error_info_rsp(crq, adapter);
3993 break;
3994 case REQUEST_STATISTICS_RSP:
3995 netdev_dbg(netdev, "Got Statistics Response\n");
3996 complete(&adapter->stats_done);
3997 break;
032c5e82
TF		 3998 case QUERY_IP_OFFLOAD_RSP:
3999 netdev_dbg(netdev, "Got Query IP offload Response\n");
4000 handle_query_ip_offload_rsp(adapter);
4001 break;
4002 case MULTICAST_CTRL_RSP:
4003 netdev_dbg(netdev, "Got multicast control Response\n");
4004 break;
4005 case CONTROL_IP_OFFLOAD_RSP:
4006 netdev_dbg(netdev, "Got Control IP offload Response\n");
4007 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4008 sizeof(adapter->ip_offload_ctrl),
4009 DMA_TO_DEVICE);
bd0b6723 4010 complete(&adapter->init_done);
032c5e82 4011 break;
032c5e82
TF		 4012 case COLLECT_FW_TRACE_RSP:
4013 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4014 complete(&adapter->fw_done);
4015 break;
4e6759be
DANR		 4016 case GET_VPD_SIZE_RSP:
4017 handle_vpd_size_rsp(crq, adapter);
4018 break;
4019 case GET_VPD_RSP:
4020 handle_vpd_rsp(crq, adapter);
4021 break;
032c5e82
TF		 4022 default:
4023 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4024 gen_crq->cmd);
4025 }
4026}
4027
4028static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4029{
4030 struct ibmvnic_adapter *adapter = instance;
6c267b3d 4031
6c267b3d 4032 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 4033 return IRQ_HANDLED;
4034}
4035
4036static void ibmvnic_tasklet(void *data)
4037{
4038 struct ibmvnic_adapter *adapter = data;
032c5e82 4039 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 4040 union ibmvnic_crq *crq;
4041 unsigned long flags;
4042 bool done = false;
4043
4044 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 4045 while (!done) {
4046 /* Pull all the valid messages off the CRQ */
4047 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4048 ibmvnic_handle_crq(crq, adapter);
4049 crq->generic.first = 0;
4050 }
ed7ecbf7
BK		 4051
4052 /* remain in tasklet until all
4053 * capabilities responses are received
4054 */
4055 if (!adapter->wait_capability)
4056 done = true;
032c5e82 4057 }
249168ad
TF		 4058 /* if capabilities CRQ's were sent in this tasklet, the following
4059 * tasklet must wait until all responses are received
4060 */
4061 if (atomic_read(&adapter->running_cap_crqs) != 0)
4062 adapter->wait_capability = true;
032c5e82 4063 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 4064}
4065
4066static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4067{
4068 struct vio_dev *vdev = adapter->vdev;
4069 int rc;
4070
4071 do {
4072 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4073 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4074
4075 if (rc)
4076 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4077
4078 return rc;
4079}
4080
4081static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4082{
4083 struct ibmvnic_crq_queue *crq = &adapter->crq;
4084 struct device *dev = &adapter->vdev->dev;
4085 struct vio_dev *vdev = adapter->vdev;
4086 int rc;
4087
4088 /* Close the CRQ */
4089 do {
4090 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4091 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4092
4093 /* Clean out the queue */
4094 memset(crq->msgs, 0, PAGE_SIZE);
4095 crq->cur = 0;
4096
4097 /* And re-open it again */
4098 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4099 crq->msg_token, PAGE_SIZE);
4100
4101 if (rc == H_CLOSED)
4102 /* Adapter is good, but other end is not ready */
4103 dev_warn(dev, "Partner adapter not ready\n");
4104 else if (rc != 0)
4105 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4106
4107 return rc;
4108}
4109
f992887c 4110static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4111{
4112 struct ibmvnic_crq_queue *crq = &adapter->crq;
4113 struct vio_dev *vdev = adapter->vdev;
4114 long rc;
4115
f992887c
NF		 4116 if (!crq->msgs)
4117 return;
4118
032c5e82
TF		 4119 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4120 free_irq(vdev->irq, adapter);
6c267b3d 4121 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4122 do {
4123 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4124 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4125
4126 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4127 DMA_BIDIRECTIONAL);
4128 free_page((unsigned long)crq->msgs);
f992887c 4129 crq->msgs = NULL;
032c5e82
TF		 4130}
4131
f992887c 4132static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 4133{
4134 struct ibmvnic_crq_queue *crq = &adapter->crq;
4135 struct device *dev = &adapter->vdev->dev;
4136 struct vio_dev *vdev = adapter->vdev;
4137 int rc, retrc = -ENOMEM;
4138
f992887c
NF		 4139 if (crq->msgs)
4140 return 0;
4141
032c5e82
TF		 4142 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4143 /* Should we allocate more than one page? */
4144
4145 if (!crq->msgs)
4146 return -ENOMEM;
4147
4148 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4149 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4150 DMA_BIDIRECTIONAL);
4151 if (dma_mapping_error(dev, crq->msg_token))
4152 goto map_failed;
4153
4154 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4155 crq->msg_token, PAGE_SIZE);
4156
4157 if (rc == H_RESOURCE)
4158 /* maybe kexecing and resource is busy. try a reset */
4159 rc = ibmvnic_reset_crq(adapter);
4160 retrc = rc;
4161
4162 if (rc == H_CLOSED) {
4163 dev_warn(dev, "Partner adapter not ready\n");
4164 } else if (rc) {
4165 dev_warn(dev, "Error %d opening adapter\n", rc);
4166 goto reg_crq_failed;
4167 }
4168
4169 retrc = 0;
4170
6c267b3d
TF		 4171 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4172 (unsigned long)adapter);
4173
032c5e82
TF		 4174 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4175 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4176 adapter);
4177 if (rc) {
4178 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4179 vdev->irq, rc);
4180 goto req_irq_failed;
4181 }
4182
4183 rc = vio_enable_interrupts(vdev);
4184 if (rc) {
4185 dev_err(dev, "Error %d enabling interrupts\n", rc);
4186 goto req_irq_failed;
4187 }
4188
4189 crq->cur = 0;
4190 spin_lock_init(&crq->lock);
4191
4192 return retrc;
4193
4194req_irq_failed:
6c267b3d 4195 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 4196 do {
4197 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4198 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4199reg_crq_failed:
4200 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4201map_failed:
4202 free_page((unsigned long)crq->msgs);
f992887c 4203 crq->msgs = NULL;
032c5e82
TF		 4204 return retrc;
4205}
4206
f6ef6408 4207static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 4208{
f6ef6408 4209 struct device *dev = &adapter->vdev->dev;
ea22d51a 4210 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 4211 int rc;
4212
c26eba03 4213 if (adapter->resetting && !adapter->wait_for_reset) {
28cde751
NF		 4214 rc = ibmvnic_reset_crq(adapter);
4215 if (!rc)
4216 rc = vio_enable_interrupts(adapter->vdev);
4217 } else {
4218 rc = init_crq_queue(adapter);
4219 }
4220
f6ef6408
JA		 4221 if (rc) {
4222 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4223 return rc;
4224 }
4225
017892c1
JA		 4226 adapter->from_passive_init = false;
4227
f6ef6408 4228 init_completion(&adapter->init_done);
6a2fb0e9 4229 adapter->init_done_rc = 0;
f6ef6408
JA		 4230 ibmvnic_send_crq_init(adapter);
4231 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4232 dev_err(dev, "Initialization sequence timed out\n");
017892c1
JA		 4233 return -1;
4234 }
4235
6a2fb0e9
NF		 4236 if (adapter->init_done_rc) {
4237 release_crq_queue(adapter);
4238 return adapter->init_done_rc;
4239 }
4240
017892c1
JA		 4241 if (adapter->from_passive_init) {
4242 adapter->state = VNIC_OPEN;
4243 adapter->from_passive_init = false;
f6ef6408
JA		 4244 return -1;
4245 }
4246
c26eba03 4247 if (adapter->resetting && !adapter->wait_for_reset)
57a49436
NF		 4248 rc = reset_sub_crq_queues(adapter);
4249 else
4250 rc = init_sub_crqs(adapter);
1bb3c739
NF		 4251 if (rc) {
4252 dev_err(dev, "Initialization of sub crqs failed\n");
4253 release_crq_queue(adapter);
5df969c3
TF		 4254 return rc;
4255 }
4256
4257 rc = init_sub_crq_irqs(adapter);
4258 if (rc) {
4259 dev_err(dev, "Failed to initialize sub crq irqs\n");
4260 release_crq_queue(adapter);
1bb3c739
NF		 4261 }
4262
4263 return rc;
f6ef6408
JA		 4264}
4265
40c9db8a
TF		 4266static struct device_attribute dev_attr_failover;
4267
f6ef6408
JA		 4268static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4269{
032c5e82
TF		 4270 struct ibmvnic_adapter *adapter;
4271 struct net_device *netdev;
4272 unsigned char *mac_addr_p;
032c5e82
TF		 4273 int rc;
4274
4275 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4276 dev->unit_address);
4277
4278 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4279 VETH_MAC_ADDR, NULL);
4280 if (!mac_addr_p) {
4281 dev_err(&dev->dev,
4282 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4283 __FILE__, __LINE__);
4284 return 0;
4285 }
4286
4287 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4288 IBMVNIC_MAX_TX_QUEUES);
4289 if (!netdev)
4290 return -ENOMEM;
4291
4292 adapter = netdev_priv(netdev);
90c8014c 4293 adapter->state = VNIC_PROBING;
032c5e82
TF		 4294 dev_set_drvdata(&dev->dev, netdev);
4295 adapter->vdev = dev;
4296 adapter->netdev = netdev;
4297
4298 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4299 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4300 netdev->irq = dev->irq;
4301 netdev->netdev_ops = &ibmvnic_netdev_ops;
4302 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4303 SET_NETDEV_DEV(netdev, &dev->dev);
4304
4305 spin_lock_init(&adapter->stats_lock);
4306
032c5e82 4307 INIT_LIST_HEAD(&adapter->errors);
032c5e82 4308 spin_lock_init(&adapter->error_list_lock);
032c5e82 4309
ed651a10
NF		 4310 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4311 INIT_LIST_HEAD(&adapter->rwi_list);
4312 mutex_init(&adapter->reset_lock);
4313 mutex_init(&adapter->rwi_lock);
4314 adapter->resetting = false;
4315
c26eba03
JA		 4316 adapter->mac_change_pending = false;
4317
6a2fb0e9
NF		 4318 do {
4319 rc = ibmvnic_init(adapter);
7c1885ae
NF		 4320 if (rc && rc != EAGAIN)
4321 goto ibmvnic_init_fail;
6a2fb0e9 4322 } while (rc == EAGAIN);
032c5e82 4323
f39f0d1e 4324 netdev->mtu = adapter->req_mtu - ETH_HLEN;
c26eba03
JA		 4325 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4326 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82 4327
40c9db8a 4328 rc = device_create_file(&dev->dev, &dev_attr_failover);
7c1885ae
NF		 4329 if (rc)
4330 goto ibmvnic_init_fail;
40c9db8a 4331
e876a8a7 4332 netif_carrier_off(netdev);
032c5e82
TF		 4333 rc = register_netdev(netdev);
4334 if (rc) {
4335 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
7c1885ae 4336 goto ibmvnic_register_fail;
032c5e82
TF		 4337 }
4338 dev_info(&dev->dev, "ibmvnic registered\n");
4339
90c8014c 4340 adapter->state = VNIC_PROBED;
c26eba03
JA		 4341
4342 adapter->wait_for_reset = false;
4343
032c5e82 4344 return 0;
7c1885ae
NF		 4345
4346ibmvnic_register_fail:
4347 device_remove_file(&dev->dev, &dev_attr_failover);
4348
4349ibmvnic_init_fail:
4350 release_sub_crqs(adapter);
4351 release_crq_queue(adapter);
4352 free_netdev(netdev);
4353
4354 return rc;
032c5e82
TF		 4355}
4356
4357static int ibmvnic_remove(struct vio_dev *dev)
4358{
4359 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 4360 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4361
90c8014c 4362 adapter->state = VNIC_REMOVING;
032c5e82 4363 unregister_netdev(netdev);
ed651a10 4364 mutex_lock(&adapter->reset_lock);
37489055
NF		 4365
4366 release_resources(adapter);
4367 release_sub_crqs(adapter);
4368 release_crq_queue(adapter);
4369
90c8014c
NF		 4370 adapter->state = VNIC_REMOVED;
4371
ed651a10 4372 mutex_unlock(&adapter->reset_lock);
40c9db8a 4373 device_remove_file(&dev->dev, &dev_attr_failover);
032c5e82
TF		 4374 free_netdev(netdev);
4375 dev_set_drvdata(&dev->dev, NULL);
4376
4377 return 0;
4378}
4379
40c9db8a
TF		 4380static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4381 const char *buf, size_t count)
4382{
4383 struct net_device *netdev = dev_get_drvdata(dev);
4384 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4385 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4386 __be64 session_token;
4387 long rc;
4388
4389 if (!sysfs_streq(buf, "1"))
4390 return -EINVAL;
4391
4392 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4393 H_GET_SESSION_TOKEN, 0, 0, 0);
4394 if (rc) {
4395 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4396 rc);
4397 return -EINVAL;
4398 }
4399
4400 session_token = (__be64)retbuf[0];
4401 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4402 be64_to_cpu(session_token));
4403 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4404 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4405 if (rc) {
4406 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4407 rc);
4408 return -EINVAL;
4409 }
4410
4411 return count;
4412}
4413
4414static DEVICE_ATTR(failover, 0200, NULL, failover_store);
4415
032c5e82
TF		 4416static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4417{
4418 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4419 struct ibmvnic_adapter *adapter;
4420 struct iommu_table *tbl;
4421 unsigned long ret = 0;
4422 int i;
4423
4424 tbl = get_iommu_table_base(&vdev->dev);
4425
4426 /* netdev inits at probe time along with the structures we need below*/
4427 if (!netdev)
4428 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4429
4430 adapter = netdev_priv(netdev);
4431
4432 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 4433 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4434
4435 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4436 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4437
4438 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4439 i++)
4440 ret += adapter->rx_pool[i].size *
4441 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4442
4443 return ret;
4444}
4445
4446static int ibmvnic_resume(struct device *dev)
4447{
4448 struct net_device *netdev = dev_get_drvdata(dev);
4449 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 4450
cb89ba24
JA		 4451 if (adapter->state != VNIC_OPEN)
4452 return 0;
4453
a248878d 4454 tasklet_schedule(&adapter->tasklet);
032c5e82
TF		 4455
4456 return 0;
4457}
4458
8c37bc67 4459static const struct vio_device_id ibmvnic_device_table[] = {
032c5e82
TF		 4460 {"network", "IBM,vnic"},
4461 {"", "" }
4462};
4463MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4464
4465static const struct dev_pm_ops ibmvnic_pm_ops = {
4466 .resume = ibmvnic_resume
4467};
4468
4469static struct vio_driver ibmvnic_driver = {
4470 .id_table = ibmvnic_device_table,
4471 .probe = ibmvnic_probe,
4472 .remove = ibmvnic_remove,
4473 .get_desired_dma = ibmvnic_get_desired_dma,
4474 .name = ibmvnic_driver_name,
4475 .pm = &ibmvnic_pm_ops,
4476};
4477
4478/* module functions */
4479static int __init ibmvnic_module_init(void)
4480{
4481 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4482 IBMVNIC_DRIVER_VERSION);
4483
4484 return vio_register_driver(&ibmvnic_driver);
4485}
4486
4487static void __exit ibmvnic_module_exit(void)
4488{
4489 vio_unregister_driver(&ibmvnic_driver);
4490}
4491
4492module_init(ibmvnic_module_init);
4493module_exit(ibmvnic_module_exit);
Linux 6.x block layer and io_uring tree(s)