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[mirror_ubuntu-hirsute-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /**************************************************************************/
3 /* */
4 /* IBM System i and System p Virtual NIC Device Driver */
5 /* Copyright (C) 2014 IBM Corp. */
6 /* Santiago Leon (santi_leon@yahoo.com) */
7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
8 /* John Allen (jallen@linux.vnet.ibm.com) */
9 /* */
10 /* */
11 /* This module contains the implementation of a virtual ethernet device */
12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
13 /* option of the RS/6000 Platform Architecture to interface with virtual */
14 /* ethernet NICs that are presented to the partition by the hypervisor. */
15 /* */
16 /* Messages are passed between the VNIC driver and the VNIC server using */
17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
18 /* issue and receive commands that initiate communication with the server */
19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
20 /* are used by the driver to notify the server that a packet is */
21 /* ready for transmission or that a buffer has been added to receive a */
22 /* packet. Subsequently, sCRQs are used by the server to notify the */
23 /* driver that a packet transmission has been completed or that a packet */
24 /* has been received and placed in a waiting buffer. */
25 /* */
26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
27 /* which skbs are DMA mapped and immediately unmapped when the transmit */
28 /* or receive has been completed, the VNIC driver is required to use */
29 /* "long term mapping". This entails that large, continuous DMA mapped */
30 /* buffers are allocated on driver initialization and these buffers are */
31 /* then continuously reused to pass skbs to and from the VNIC server. */
32 /* */
33 /**************************************************************************/
34
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/types.h>
38 #include <linux/errno.h>
39 #include <linux/completion.h>
40 #include <linux/ioport.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kernel.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/init.h>
47 #include <linux/delay.h>
48 #include <linux/mm.h>
49 #include <linux/ethtool.h>
50 #include <linux/proc_fs.h>
51 #include <linux/if_arp.h>
52 #include <linux/in.h>
53 #include <linux/ip.h>
54 #include <linux/ipv6.h>
55 #include <linux/irq.h>
56 #include <linux/kthread.h>
57 #include <linux/seq_file.h>
58 #include <linux/interrupt.h>
59 #include <net/net_namespace.h>
60 #include <asm/hvcall.h>
61 #include <linux/atomic.h>
62 #include <asm/vio.h>
63 #include <asm/iommu.h>
64 #include <linux/uaccess.h>
65 #include <asm/firmware.h>
66 #include <linux/workqueue.h>
67 #include <linux/if_vlan.h>
68 #include <linux/utsname.h>
69
70 #include "ibmvnic.h"
71
72 static const char ibmvnic_driver_name[] = "ibmvnic";
73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
74
75 MODULE_AUTHOR("Santiago Leon");
76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
77 MODULE_LICENSE("GPL");
78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
79
80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
81 static int ibmvnic_remove(struct vio_dev *);
82 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
87 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
88 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
89 static int enable_scrq_irq(struct ibmvnic_adapter *,
90 struct ibmvnic_sub_crq_queue *);
91 static int disable_scrq_irq(struct ibmvnic_adapter *,
92 struct ibmvnic_sub_crq_queue *);
93 static int pending_scrq(struct ibmvnic_adapter *,
94 struct ibmvnic_sub_crq_queue *);
95 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
96 struct ibmvnic_sub_crq_queue *);
97 static int ibmvnic_poll(struct napi_struct *napi, int data);
98 static void send_query_map(struct ibmvnic_adapter *adapter);
99 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
100 static int send_request_unmap(struct ibmvnic_adapter *, u8);
101 static int send_login(struct ibmvnic_adapter *adapter);
102 static void send_query_cap(struct ibmvnic_adapter *adapter);
103 static int init_sub_crqs(struct ibmvnic_adapter *);
104 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
105 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
106 static void release_crq_queue(struct ibmvnic_adapter *);
107 static int __ibmvnic_set_mac(struct net_device *, u8 *);
108 static int init_crq_queue(struct ibmvnic_adapter *adapter);
109 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
110
111 struct ibmvnic_stat {
112 char name[ETH_GSTRING_LEN];
113 int offset;
114 };
115
116 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
117 offsetof(struct ibmvnic_statistics, stat))
118 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
119
120 static const struct ibmvnic_stat ibmvnic_stats[] = {
121 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
122 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
123 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
124 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
125 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
126 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
127 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
128 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
129 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
130 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
131 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
132 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
133 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
134 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
135 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
136 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
137 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
138 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
139 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
140 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
141 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
142 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
143 };
144
145 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
146 unsigned long length, unsigned long *number,
147 unsigned long *irq)
148 {
149 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
150 long rc;
151
152 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
153 *number = retbuf[0];
154 *irq = retbuf[1];
155
156 return rc;
157 }
158
159 /**
160 * ibmvnic_wait_for_completion - Check device state and wait for completion
161 * @adapter: private device data
162 * @comp_done: completion structure to wait for
163 * @timeout: time to wait in milliseconds
164 *
165 * Wait for a completion signal or until the timeout limit is reached
166 * while checking that the device is still active.
167 */
168 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
169 struct completion *comp_done,
170 unsigned long timeout)
171 {
172 struct net_device *netdev;
173 unsigned long div_timeout;
174 u8 retry;
175
176 netdev = adapter->netdev;
177 retry = 5;
178 div_timeout = msecs_to_jiffies(timeout / retry);
179 while (true) {
180 if (!adapter->crq.active) {
181 netdev_err(netdev, "Device down!\n");
182 return -ENODEV;
183 }
184 if (!retry--)
185 break;
186 if (wait_for_completion_timeout(comp_done, div_timeout))
187 return 0;
188 }
189 netdev_err(netdev, "Operation timed out.\n");
190 return -ETIMEDOUT;
191 }
192
193 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
194 struct ibmvnic_long_term_buff *ltb, int size)
195 {
196 struct device *dev = &adapter->vdev->dev;
197 int rc;
198
199 ltb->size = size;
200 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
201 GFP_KERNEL);
202
203 if (!ltb->buff) {
204 dev_err(dev, "Couldn't alloc long term buffer\n");
205 return -ENOMEM;
206 }
207 ltb->map_id = adapter->map_id;
208 adapter->map_id++;
209
210 mutex_lock(&adapter->fw_lock);
211 adapter->fw_done_rc = 0;
212 reinit_completion(&adapter->fw_done);
213 rc = send_request_map(adapter, ltb->addr,
214 ltb->size, ltb->map_id);
215 if (rc) {
216 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
217 mutex_unlock(&adapter->fw_lock);
218 return rc;
219 }
220
221 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
222 if (rc) {
223 dev_err(dev,
224 "Long term map request aborted or timed out,rc = %d\n",
225 rc);
226 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
227 mutex_unlock(&adapter->fw_lock);
228 return rc;
229 }
230
231 if (adapter->fw_done_rc) {
232 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
233 adapter->fw_done_rc);
234 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
235 mutex_unlock(&adapter->fw_lock);
236 return -1;
237 }
238 mutex_unlock(&adapter->fw_lock);
239 return 0;
240 }
241
242 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
243 struct ibmvnic_long_term_buff *ltb)
244 {
245 struct device *dev = &adapter->vdev->dev;
246
247 if (!ltb->buff)
248 return;
249
250 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
251 adapter->reset_reason != VNIC_RESET_MOBILITY)
252 send_request_unmap(adapter, ltb->map_id);
253 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
254 }
255
256 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
257 struct ibmvnic_long_term_buff *ltb)
258 {
259 struct device *dev = &adapter->vdev->dev;
260 int rc;
261
262 memset(ltb->buff, 0, ltb->size);
263
264 mutex_lock(&adapter->fw_lock);
265 adapter->fw_done_rc = 0;
266
267 reinit_completion(&adapter->fw_done);
268 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
269 if (rc) {
270 mutex_unlock(&adapter->fw_lock);
271 return rc;
272 }
273
274 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
275 if (rc) {
276 dev_info(dev,
277 "Reset failed, long term map request timed out or aborted\n");
278 mutex_unlock(&adapter->fw_lock);
279 return rc;
280 }
281
282 if (adapter->fw_done_rc) {
283 dev_info(dev,
284 "Reset failed, attempting to free and reallocate buffer\n");
285 free_long_term_buff(adapter, ltb);
286 mutex_unlock(&adapter->fw_lock);
287 return alloc_long_term_buff(adapter, ltb, ltb->size);
288 }
289 mutex_unlock(&adapter->fw_lock);
290 return 0;
291 }
292
293 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
294 {
295 int i;
296
297 for (i = 0; i < adapter->num_active_rx_pools; i++)
298 adapter->rx_pool[i].active = 0;
299 }
300
301 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
302 struct ibmvnic_rx_pool *pool)
303 {
304 int count = pool->size - atomic_read(&pool->available);
305 u64 handle = adapter->rx_scrq[pool->index]->handle;
306 struct device *dev = &adapter->vdev->dev;
307 struct ibmvnic_ind_xmit_queue *ind_bufp;
308 struct ibmvnic_sub_crq_queue *rx_scrq;
309 union sub_crq *sub_crq;
310 int buffers_added = 0;
311 unsigned long lpar_rc;
312 struct sk_buff *skb;
313 unsigned int offset;
314 dma_addr_t dma_addr;
315 unsigned char *dst;
316 int shift = 0;
317 int index;
318 int i;
319
320 if (!pool->active)
321 return;
322
323 rx_scrq = adapter->rx_scrq[pool->index];
324 ind_bufp = &rx_scrq->ind_buf;
325 for (i = 0; i < count; ++i) {
326 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
327 if (!skb) {
328 dev_err(dev, "Couldn't replenish rx buff\n");
329 adapter->replenish_no_mem++;
330 break;
331 }
332
333 index = pool->free_map[pool->next_free];
334
335 if (pool->rx_buff[index].skb)
336 dev_err(dev, "Inconsistent free_map!\n");
337
338 /* Copy the skb to the long term mapped DMA buffer */
339 offset = index * pool->buff_size;
340 dst = pool->long_term_buff.buff + offset;
341 memset(dst, 0, pool->buff_size);
342 dma_addr = pool->long_term_buff.addr + offset;
343 pool->rx_buff[index].data = dst;
344
345 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
346 pool->rx_buff[index].dma = dma_addr;
347 pool->rx_buff[index].skb = skb;
348 pool->rx_buff[index].pool_index = pool->index;
349 pool->rx_buff[index].size = pool->buff_size;
350
351 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++];
352 memset(sub_crq, 0, sizeof(*sub_crq));
353 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD;
354 sub_crq->rx_add.correlator =
355 cpu_to_be64((u64)&pool->rx_buff[index]);
356 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr);
357 sub_crq->rx_add.map_id = pool->long_term_buff.map_id;
358
359 /* The length field of the sCRQ is defined to be 24 bits so the
360 * buffer size needs to be left shifted by a byte before it is
361 * converted to big endian to prevent the last byte from being
362 * truncated.
363 */
364 #ifdef __LITTLE_ENDIAN__
365 shift = 8;
366 #endif
367 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift);
368 pool->next_free = (pool->next_free + 1) % pool->size;
369 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS ||
370 i == count - 1) {
371 lpar_rc =
372 send_subcrq_indirect(adapter, handle,
373 (u64)ind_bufp->indir_dma,
374 (u64)ind_bufp->index);
375 if (lpar_rc != H_SUCCESS)
376 goto failure;
377 buffers_added += ind_bufp->index;
378 adapter->replenish_add_buff_success += ind_bufp->index;
379 ind_bufp->index = 0;
380 }
381 }
382 atomic_add(buffers_added, &pool->available);
383 return;
384
385 failure:
386 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
387 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
388 for (i = ind_bufp->index - 1; i >= 0; --i) {
389 struct ibmvnic_rx_buff *rx_buff;
390
391 pool->next_free = pool->next_free == 0 ?
392 pool->size - 1 : pool->next_free - 1;
393 sub_crq = &ind_bufp->indir_arr[i];
394 rx_buff = (struct ibmvnic_rx_buff *)
395 be64_to_cpu(sub_crq->rx_add.correlator);
396 index = (int)(rx_buff - pool->rx_buff);
397 pool->free_map[pool->next_free] = index;
398 dev_kfree_skb_any(pool->rx_buff[index].skb);
399 pool->rx_buff[index].skb = NULL;
400 }
401 ind_bufp->index = 0;
402 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
403 /* Disable buffer pool replenishment and report carrier off if
404 * queue is closed or pending failover.
405 * Firmware guarantees that a signal will be sent to the
406 * driver, triggering a reset.
407 */
408 deactivate_rx_pools(adapter);
409 netif_carrier_off(adapter->netdev);
410 }
411 }
412
413 static void replenish_pools(struct ibmvnic_adapter *adapter)
414 {
415 int i;
416
417 adapter->replenish_task_cycles++;
418 for (i = 0; i < adapter->num_active_rx_pools; i++) {
419 if (adapter->rx_pool[i].active)
420 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
421 }
422 }
423
424 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
425 {
426 kfree(adapter->tx_stats_buffers);
427 kfree(adapter->rx_stats_buffers);
428 adapter->tx_stats_buffers = NULL;
429 adapter->rx_stats_buffers = NULL;
430 }
431
432 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
433 {
434 adapter->tx_stats_buffers =
435 kcalloc(IBMVNIC_MAX_QUEUES,
436 sizeof(struct ibmvnic_tx_queue_stats),
437 GFP_KERNEL);
438 if (!adapter->tx_stats_buffers)
439 return -ENOMEM;
440
441 adapter->rx_stats_buffers =
442 kcalloc(IBMVNIC_MAX_QUEUES,
443 sizeof(struct ibmvnic_rx_queue_stats),
444 GFP_KERNEL);
445 if (!adapter->rx_stats_buffers)
446 return -ENOMEM;
447
448 return 0;
449 }
450
451 static void release_stats_token(struct ibmvnic_adapter *adapter)
452 {
453 struct device *dev = &adapter->vdev->dev;
454
455 if (!adapter->stats_token)
456 return;
457
458 dma_unmap_single(dev, adapter->stats_token,
459 sizeof(struct ibmvnic_statistics),
460 DMA_FROM_DEVICE);
461 adapter->stats_token = 0;
462 }
463
464 static int init_stats_token(struct ibmvnic_adapter *adapter)
465 {
466 struct device *dev = &adapter->vdev->dev;
467 dma_addr_t stok;
468
469 stok = dma_map_single(dev, &adapter->stats,
470 sizeof(struct ibmvnic_statistics),
471 DMA_FROM_DEVICE);
472 if (dma_mapping_error(dev, stok)) {
473 dev_err(dev, "Couldn't map stats buffer\n");
474 return -1;
475 }
476
477 adapter->stats_token = stok;
478 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
479 return 0;
480 }
481
482 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
483 {
484 struct ibmvnic_rx_pool *rx_pool;
485 u64 buff_size;
486 int rx_scrqs;
487 int i, j, rc;
488
489 if (!adapter->rx_pool)
490 return -1;
491
492 buff_size = adapter->cur_rx_buf_sz;
493 rx_scrqs = adapter->num_active_rx_pools;
494 for (i = 0; i < rx_scrqs; i++) {
495 rx_pool = &adapter->rx_pool[i];
496
497 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
498
499 if (rx_pool->buff_size != buff_size) {
500 free_long_term_buff(adapter, &rx_pool->long_term_buff);
501 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
502 rc = alloc_long_term_buff(adapter,
503 &rx_pool->long_term_buff,
504 rx_pool->size *
505 rx_pool->buff_size);
506 } else {
507 rc = reset_long_term_buff(adapter,
508 &rx_pool->long_term_buff);
509 }
510
511 if (rc)
512 return rc;
513
514 for (j = 0; j < rx_pool->size; j++)
515 rx_pool->free_map[j] = j;
516
517 memset(rx_pool->rx_buff, 0,
518 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
519
520 atomic_set(&rx_pool->available, 0);
521 rx_pool->next_alloc = 0;
522 rx_pool->next_free = 0;
523 rx_pool->active = 1;
524 }
525
526 return 0;
527 }
528
529 static void release_rx_pools(struct ibmvnic_adapter *adapter)
530 {
531 struct ibmvnic_rx_pool *rx_pool;
532 int i, j;
533
534 if (!adapter->rx_pool)
535 return;
536
537 for (i = 0; i < adapter->num_active_rx_pools; i++) {
538 rx_pool = &adapter->rx_pool[i];
539
540 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
541
542 kfree(rx_pool->free_map);
543 free_long_term_buff(adapter, &rx_pool->long_term_buff);
544
545 if (!rx_pool->rx_buff)
546 continue;
547
548 for (j = 0; j < rx_pool->size; j++) {
549 if (rx_pool->rx_buff[j].skb) {
550 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
551 rx_pool->rx_buff[j].skb = NULL;
552 }
553 }
554
555 kfree(rx_pool->rx_buff);
556 }
557
558 kfree(adapter->rx_pool);
559 adapter->rx_pool = NULL;
560 adapter->num_active_rx_pools = 0;
561 }
562
563 static int init_rx_pools(struct net_device *netdev)
564 {
565 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
566 struct device *dev = &adapter->vdev->dev;
567 struct ibmvnic_rx_pool *rx_pool;
568 int rxadd_subcrqs;
569 u64 buff_size;
570 int i, j;
571
572 rxadd_subcrqs = adapter->num_active_rx_scrqs;
573 buff_size = adapter->cur_rx_buf_sz;
574
575 adapter->rx_pool = kcalloc(rxadd_subcrqs,
576 sizeof(struct ibmvnic_rx_pool),
577 GFP_KERNEL);
578 if (!adapter->rx_pool) {
579 dev_err(dev, "Failed to allocate rx pools\n");
580 return -1;
581 }
582
583 adapter->num_active_rx_pools = rxadd_subcrqs;
584
585 for (i = 0; i < rxadd_subcrqs; i++) {
586 rx_pool = &adapter->rx_pool[i];
587
588 netdev_dbg(adapter->netdev,
589 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
590 i, adapter->req_rx_add_entries_per_subcrq,
591 buff_size);
592
593 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
594 rx_pool->index = i;
595 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
596 rx_pool->active = 1;
597
598 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
599 GFP_KERNEL);
600 if (!rx_pool->free_map) {
601 release_rx_pools(adapter);
602 return -1;
603 }
604
605 rx_pool->rx_buff = kcalloc(rx_pool->size,
606 sizeof(struct ibmvnic_rx_buff),
607 GFP_KERNEL);
608 if (!rx_pool->rx_buff) {
609 dev_err(dev, "Couldn't alloc rx buffers\n");
610 release_rx_pools(adapter);
611 return -1;
612 }
613
614 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
615 rx_pool->size * rx_pool->buff_size)) {
616 release_rx_pools(adapter);
617 return -1;
618 }
619
620 for (j = 0; j < rx_pool->size; ++j)
621 rx_pool->free_map[j] = j;
622
623 atomic_set(&rx_pool->available, 0);
624 rx_pool->next_alloc = 0;
625 rx_pool->next_free = 0;
626 }
627
628 return 0;
629 }
630
631 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
632 struct ibmvnic_tx_pool *tx_pool)
633 {
634 int rc, i;
635
636 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
637 if (rc)
638 return rc;
639
640 memset(tx_pool->tx_buff, 0,
641 tx_pool->num_buffers *
642 sizeof(struct ibmvnic_tx_buff));
643
644 for (i = 0; i < tx_pool->num_buffers; i++)
645 tx_pool->free_map[i] = i;
646
647 tx_pool->consumer_index = 0;
648 tx_pool->producer_index = 0;
649
650 return 0;
651 }
652
653 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
654 {
655 int tx_scrqs;
656 int i, rc;
657
658 if (!adapter->tx_pool)
659 return -1;
660
661 tx_scrqs = adapter->num_active_tx_pools;
662 for (i = 0; i < tx_scrqs; i++) {
663 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
664 if (rc)
665 return rc;
666 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
667 if (rc)
668 return rc;
669 }
670
671 return 0;
672 }
673
674 static void release_vpd_data(struct ibmvnic_adapter *adapter)
675 {
676 if (!adapter->vpd)
677 return;
678
679 kfree(adapter->vpd->buff);
680 kfree(adapter->vpd);
681
682 adapter->vpd = NULL;
683 }
684
685 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
686 struct ibmvnic_tx_pool *tx_pool)
687 {
688 kfree(tx_pool->tx_buff);
689 kfree(tx_pool->free_map);
690 free_long_term_buff(adapter, &tx_pool->long_term_buff);
691 }
692
693 static void release_tx_pools(struct ibmvnic_adapter *adapter)
694 {
695 int i;
696
697 if (!adapter->tx_pool)
698 return;
699
700 for (i = 0; i < adapter->num_active_tx_pools; i++) {
701 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
702 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
703 }
704
705 kfree(adapter->tx_pool);
706 adapter->tx_pool = NULL;
707 kfree(adapter->tso_pool);
708 adapter->tso_pool = NULL;
709 adapter->num_active_tx_pools = 0;
710 }
711
712 static int init_one_tx_pool(struct net_device *netdev,
713 struct ibmvnic_tx_pool *tx_pool,
714 int num_entries, int buf_size)
715 {
716 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
717 int i;
718
719 tx_pool->tx_buff = kcalloc(num_entries,
720 sizeof(struct ibmvnic_tx_buff),
721 GFP_KERNEL);
722 if (!tx_pool->tx_buff)
723 return -1;
724
725 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
726 num_entries * buf_size))
727 return -1;
728
729 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
730 if (!tx_pool->free_map)
731 return -1;
732
733 for (i = 0; i < num_entries; i++)
734 tx_pool->free_map[i] = i;
735
736 tx_pool->consumer_index = 0;
737 tx_pool->producer_index = 0;
738 tx_pool->num_buffers = num_entries;
739 tx_pool->buf_size = buf_size;
740
741 return 0;
742 }
743
744 static int init_tx_pools(struct net_device *netdev)
745 {
746 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
747 int tx_subcrqs;
748 u64 buff_size;
749 int i, rc;
750
751 tx_subcrqs = adapter->num_active_tx_scrqs;
752 adapter->tx_pool = kcalloc(tx_subcrqs,
753 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
754 if (!adapter->tx_pool)
755 return -1;
756
757 adapter->tso_pool = kcalloc(tx_subcrqs,
758 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
759 if (!adapter->tso_pool)
760 return -1;
761
762 adapter->num_active_tx_pools = tx_subcrqs;
763
764 for (i = 0; i < tx_subcrqs; i++) {
765 buff_size = adapter->req_mtu + VLAN_HLEN;
766 buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
767 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
768 adapter->req_tx_entries_per_subcrq,
769 buff_size);
770 if (rc) {
771 release_tx_pools(adapter);
772 return rc;
773 }
774
775 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
776 IBMVNIC_TSO_BUFS,
777 IBMVNIC_TSO_BUF_SZ);
778 if (rc) {
779 release_tx_pools(adapter);
780 return rc;
781 }
782 }
783
784 return 0;
785 }
786
787 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
788 {
789 int i;
790
791 if (adapter->napi_enabled)
792 return;
793
794 for (i = 0; i < adapter->req_rx_queues; i++)
795 napi_enable(&adapter->napi[i]);
796
797 adapter->napi_enabled = true;
798 }
799
800 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
801 {
802 int i;
803
804 if (!adapter->napi_enabled)
805 return;
806
807 for (i = 0; i < adapter->req_rx_queues; i++) {
808 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
809 napi_disable(&adapter->napi[i]);
810 }
811
812 adapter->napi_enabled = false;
813 }
814
815 static int init_napi(struct ibmvnic_adapter *adapter)
816 {
817 int i;
818
819 adapter->napi = kcalloc(adapter->req_rx_queues,
820 sizeof(struct napi_struct), GFP_KERNEL);
821 if (!adapter->napi)
822 return -ENOMEM;
823
824 for (i = 0; i < adapter->req_rx_queues; i++) {
825 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
826 netif_napi_add(adapter->netdev, &adapter->napi[i],
827 ibmvnic_poll, NAPI_POLL_WEIGHT);
828 }
829
830 adapter->num_active_rx_napi = adapter->req_rx_queues;
831 return 0;
832 }
833
834 static void release_napi(struct ibmvnic_adapter *adapter)
835 {
836 int i;
837
838 if (!adapter->napi)
839 return;
840
841 for (i = 0; i < adapter->num_active_rx_napi; i++) {
842 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
843 netif_napi_del(&adapter->napi[i]);
844 }
845
846 kfree(adapter->napi);
847 adapter->napi = NULL;
848 adapter->num_active_rx_napi = 0;
849 adapter->napi_enabled = false;
850 }
851
852 static int ibmvnic_login(struct net_device *netdev)
853 {
854 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
855 unsigned long timeout = msecs_to_jiffies(30000);
856 int retry_count = 0;
857 int retries = 10;
858 bool retry;
859 int rc;
860
861 do {
862 retry = false;
863 if (retry_count > retries) {
864 netdev_warn(netdev, "Login attempts exceeded\n");
865 return -1;
866 }
867
868 adapter->init_done_rc = 0;
869 reinit_completion(&adapter->init_done);
870 rc = send_login(adapter);
871 if (rc) {
872 netdev_warn(netdev, "Unable to login\n");
873 return rc;
874 }
875
876 if (!wait_for_completion_timeout(&adapter->init_done,
877 timeout)) {
878 netdev_warn(netdev, "Login timed out, retrying...\n");
879 retry = true;
880 adapter->init_done_rc = 0;
881 retry_count++;
882 continue;
883 }
884
885 if (adapter->init_done_rc == ABORTED) {
886 netdev_warn(netdev, "Login aborted, retrying...\n");
887 retry = true;
888 adapter->init_done_rc = 0;
889 retry_count++;
890 /* FW or device may be busy, so
891 * wait a bit before retrying login
892 */
893 msleep(500);
894 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
895 retry_count++;
896 release_sub_crqs(adapter, 1);
897
898 retry = true;
899 netdev_dbg(netdev,
900 "Received partial success, retrying...\n");
901 adapter->init_done_rc = 0;
902 reinit_completion(&adapter->init_done);
903 send_query_cap(adapter);
904 if (!wait_for_completion_timeout(&adapter->init_done,
905 timeout)) {
906 netdev_warn(netdev,
907 "Capabilities query timed out\n");
908 return -1;
909 }
910
911 rc = init_sub_crqs(adapter);
912 if (rc) {
913 netdev_warn(netdev,
914 "SCRQ initialization failed\n");
915 return -1;
916 }
917
918 rc = init_sub_crq_irqs(adapter);
919 if (rc) {
920 netdev_warn(netdev,
921 "SCRQ irq initialization failed\n");
922 return -1;
923 }
924 } else if (adapter->init_done_rc) {
925 netdev_warn(netdev, "Adapter login failed\n");
926 return -1;
927 }
928 } while (retry);
929
930 __ibmvnic_set_mac(netdev, adapter->mac_addr);
931
932 return 0;
933 }
934
935 static void release_login_buffer(struct ibmvnic_adapter *adapter)
936 {
937 kfree(adapter->login_buf);
938 adapter->login_buf = NULL;
939 }
940
941 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
942 {
943 kfree(adapter->login_rsp_buf);
944 adapter->login_rsp_buf = NULL;
945 }
946
947 static void release_resources(struct ibmvnic_adapter *adapter)
948 {
949 release_vpd_data(adapter);
950
951 release_tx_pools(adapter);
952 release_rx_pools(adapter);
953
954 release_napi(adapter);
955 release_login_rsp_buffer(adapter);
956 }
957
958 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
959 {
960 struct net_device *netdev = adapter->netdev;
961 unsigned long timeout = msecs_to_jiffies(30000);
962 union ibmvnic_crq crq;
963 bool resend;
964 int rc;
965
966 netdev_dbg(netdev, "setting link state %d\n", link_state);
967
968 memset(&crq, 0, sizeof(crq));
969 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
970 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
971 crq.logical_link_state.link_state = link_state;
972
973 do {
974 resend = false;
975
976 reinit_completion(&adapter->init_done);
977 rc = ibmvnic_send_crq(adapter, &crq);
978 if (rc) {
979 netdev_err(netdev, "Failed to set link state\n");
980 return rc;
981 }
982
983 if (!wait_for_completion_timeout(&adapter->init_done,
984 timeout)) {
985 netdev_err(netdev, "timeout setting link state\n");
986 return -1;
987 }
988
989 if (adapter->init_done_rc == PARTIALSUCCESS) {
990 /* Partuial success, delay and re-send */
991 mdelay(1000);
992 resend = true;
993 } else if (adapter->init_done_rc) {
994 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
995 adapter->init_done_rc);
996 return adapter->init_done_rc;
997 }
998 } while (resend);
999
1000 return 0;
1001 }
1002
1003 static int set_real_num_queues(struct net_device *netdev)
1004 {
1005 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1006 int rc;
1007
1008 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
1009 adapter->req_tx_queues, adapter->req_rx_queues);
1010
1011 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
1012 if (rc) {
1013 netdev_err(netdev, "failed to set the number of tx queues\n");
1014 return rc;
1015 }
1016
1017 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1018 if (rc)
1019 netdev_err(netdev, "failed to set the number of rx queues\n");
1020
1021 return rc;
1022 }
1023
1024 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1025 {
1026 struct device *dev = &adapter->vdev->dev;
1027 union ibmvnic_crq crq;
1028 int len = 0;
1029 int rc;
1030
1031 if (adapter->vpd->buff)
1032 len = adapter->vpd->len;
1033
1034 mutex_lock(&adapter->fw_lock);
1035 adapter->fw_done_rc = 0;
1036 reinit_completion(&adapter->fw_done);
1037
1038 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1039 crq.get_vpd_size.cmd = GET_VPD_SIZE;
1040 rc = ibmvnic_send_crq(adapter, &crq);
1041 if (rc) {
1042 mutex_unlock(&adapter->fw_lock);
1043 return rc;
1044 }
1045
1046 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1047 if (rc) {
1048 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1049 mutex_unlock(&adapter->fw_lock);
1050 return rc;
1051 }
1052 mutex_unlock(&adapter->fw_lock);
1053
1054 if (!adapter->vpd->len)
1055 return -ENODATA;
1056
1057 if (!adapter->vpd->buff)
1058 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1059 else if (adapter->vpd->len != len)
1060 adapter->vpd->buff =
1061 krealloc(adapter->vpd->buff,
1062 adapter->vpd->len, GFP_KERNEL);
1063
1064 if (!adapter->vpd->buff) {
1065 dev_err(dev, "Could allocate VPD buffer\n");
1066 return -ENOMEM;
1067 }
1068
1069 adapter->vpd->dma_addr =
1070 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1071 DMA_FROM_DEVICE);
1072 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1073 dev_err(dev, "Could not map VPD buffer\n");
1074 kfree(adapter->vpd->buff);
1075 adapter->vpd->buff = NULL;
1076 return -ENOMEM;
1077 }
1078
1079 mutex_lock(&adapter->fw_lock);
1080 adapter->fw_done_rc = 0;
1081 reinit_completion(&adapter->fw_done);
1082
1083 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1084 crq.get_vpd.cmd = GET_VPD;
1085 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1086 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1087 rc = ibmvnic_send_crq(adapter, &crq);
1088 if (rc) {
1089 kfree(adapter->vpd->buff);
1090 adapter->vpd->buff = NULL;
1091 mutex_unlock(&adapter->fw_lock);
1092 return rc;
1093 }
1094
1095 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1096 if (rc) {
1097 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1098 kfree(adapter->vpd->buff);
1099 adapter->vpd->buff = NULL;
1100 mutex_unlock(&adapter->fw_lock);
1101 return rc;
1102 }
1103
1104 mutex_unlock(&adapter->fw_lock);
1105 return 0;
1106 }
1107
1108 static int init_resources(struct ibmvnic_adapter *adapter)
1109 {
1110 struct net_device *netdev = adapter->netdev;
1111 int rc;
1112
1113 rc = set_real_num_queues(netdev);
1114 if (rc)
1115 return rc;
1116
1117 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1118 if (!adapter->vpd)
1119 return -ENOMEM;
1120
1121 /* Vital Product Data (VPD) */
1122 rc = ibmvnic_get_vpd(adapter);
1123 if (rc) {
1124 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1125 return rc;
1126 }
1127
1128 adapter->map_id = 1;
1129
1130 rc = init_napi(adapter);
1131 if (rc)
1132 return rc;
1133
1134 send_query_map(adapter);
1135
1136 rc = init_rx_pools(netdev);
1137 if (rc)
1138 return rc;
1139
1140 rc = init_tx_pools(netdev);
1141 return rc;
1142 }
1143
1144 static int __ibmvnic_open(struct net_device *netdev)
1145 {
1146 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1147 enum vnic_state prev_state = adapter->state;
1148 int i, rc;
1149
1150 adapter->state = VNIC_OPENING;
1151 replenish_pools(adapter);
1152 ibmvnic_napi_enable(adapter);
1153
1154 /* We're ready to receive frames, enable the sub-crq interrupts and
1155 * set the logical link state to up
1156 */
1157 for (i = 0; i < adapter->req_rx_queues; i++) {
1158 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1159 if (prev_state == VNIC_CLOSED)
1160 enable_irq(adapter->rx_scrq[i]->irq);
1161 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1162 }
1163
1164 for (i = 0; i < adapter->req_tx_queues; i++) {
1165 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1166 if (prev_state == VNIC_CLOSED)
1167 enable_irq(adapter->tx_scrq[i]->irq);
1168 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1169 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i));
1170 }
1171
1172 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1173 if (rc) {
1174 for (i = 0; i < adapter->req_rx_queues; i++)
1175 napi_disable(&adapter->napi[i]);
1176 release_resources(adapter);
1177 return rc;
1178 }
1179
1180 netif_tx_start_all_queues(netdev);
1181
1182 if (prev_state == VNIC_CLOSED) {
1183 for (i = 0; i < adapter->req_rx_queues; i++)
1184 napi_schedule(&adapter->napi[i]);
1185 }
1186
1187 adapter->state = VNIC_OPEN;
1188 return rc;
1189 }
1190
1191 static int ibmvnic_open(struct net_device *netdev)
1192 {
1193 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1194 int rc;
1195
1196 /* If device failover is pending, just set device state and return.
1197 * Device operation will be handled by reset routine.
1198 */
1199 if (adapter->failover_pending) {
1200 adapter->state = VNIC_OPEN;
1201 return 0;
1202 }
1203
1204 if (adapter->state != VNIC_CLOSED) {
1205 rc = ibmvnic_login(netdev);
1206 if (rc)
1207 goto out;
1208
1209 rc = init_resources(adapter);
1210 if (rc) {
1211 netdev_err(netdev, "failed to initialize resources\n");
1212 release_resources(adapter);
1213 goto out;
1214 }
1215 }
1216
1217 rc = __ibmvnic_open(netdev);
1218
1219 out:
1220 /*
1221 * If open fails due to a pending failover, set device state and
1222 * return. Device operation will be handled by reset routine.
1223 */
1224 if (rc && adapter->failover_pending) {
1225 adapter->state = VNIC_OPEN;
1226 rc = 0;
1227 }
1228 return rc;
1229 }
1230
1231 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1232 {
1233 struct ibmvnic_rx_pool *rx_pool;
1234 struct ibmvnic_rx_buff *rx_buff;
1235 u64 rx_entries;
1236 int rx_scrqs;
1237 int i, j;
1238
1239 if (!adapter->rx_pool)
1240 return;
1241
1242 rx_scrqs = adapter->num_active_rx_pools;
1243 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1244
1245 /* Free any remaining skbs in the rx buffer pools */
1246 for (i = 0; i < rx_scrqs; i++) {
1247 rx_pool = &adapter->rx_pool[i];
1248 if (!rx_pool || !rx_pool->rx_buff)
1249 continue;
1250
1251 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1252 for (j = 0; j < rx_entries; j++) {
1253 rx_buff = &rx_pool->rx_buff[j];
1254 if (rx_buff && rx_buff->skb) {
1255 dev_kfree_skb_any(rx_buff->skb);
1256 rx_buff->skb = NULL;
1257 }
1258 }
1259 }
1260 }
1261
1262 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1263 struct ibmvnic_tx_pool *tx_pool)
1264 {
1265 struct ibmvnic_tx_buff *tx_buff;
1266 u64 tx_entries;
1267 int i;
1268
1269 if (!tx_pool || !tx_pool->tx_buff)
1270 return;
1271
1272 tx_entries = tx_pool->num_buffers;
1273
1274 for (i = 0; i < tx_entries; i++) {
1275 tx_buff = &tx_pool->tx_buff[i];
1276 if (tx_buff && tx_buff->skb) {
1277 dev_kfree_skb_any(tx_buff->skb);
1278 tx_buff->skb = NULL;
1279 }
1280 }
1281 }
1282
1283 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1284 {
1285 int tx_scrqs;
1286 int i;
1287
1288 if (!adapter->tx_pool || !adapter->tso_pool)
1289 return;
1290
1291 tx_scrqs = adapter->num_active_tx_pools;
1292
1293 /* Free any remaining skbs in the tx buffer pools */
1294 for (i = 0; i < tx_scrqs; i++) {
1295 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1296 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1297 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1298 }
1299 }
1300
1301 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1302 {
1303 struct net_device *netdev = adapter->netdev;
1304 int i;
1305
1306 if (adapter->tx_scrq) {
1307 for (i = 0; i < adapter->req_tx_queues; i++)
1308 if (adapter->tx_scrq[i]->irq) {
1309 netdev_dbg(netdev,
1310 "Disabling tx_scrq[%d] irq\n", i);
1311 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1312 disable_irq(adapter->tx_scrq[i]->irq);
1313 }
1314 }
1315
1316 if (adapter->rx_scrq) {
1317 for (i = 0; i < adapter->req_rx_queues; i++) {
1318 if (adapter->rx_scrq[i]->irq) {
1319 netdev_dbg(netdev,
1320 "Disabling rx_scrq[%d] irq\n", i);
1321 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1322 disable_irq(adapter->rx_scrq[i]->irq);
1323 }
1324 }
1325 }
1326 }
1327
1328 static void ibmvnic_cleanup(struct net_device *netdev)
1329 {
1330 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1331
1332 /* ensure that transmissions are stopped if called by do_reset */
1333 if (test_bit(0, &adapter->resetting))
1334 netif_tx_disable(netdev);
1335 else
1336 netif_tx_stop_all_queues(netdev);
1337
1338 ibmvnic_napi_disable(adapter);
1339 ibmvnic_disable_irqs(adapter);
1340
1341 clean_rx_pools(adapter);
1342 clean_tx_pools(adapter);
1343 }
1344
1345 static int __ibmvnic_close(struct net_device *netdev)
1346 {
1347 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1348 int rc = 0;
1349
1350 adapter->state = VNIC_CLOSING;
1351 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1352 if (rc)
1353 return rc;
1354 adapter->state = VNIC_CLOSED;
1355 return 0;
1356 }
1357
1358 static int ibmvnic_close(struct net_device *netdev)
1359 {
1360 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1361 int rc;
1362
1363 /* If device failover is pending, just set device state and return.
1364 * Device operation will be handled by reset routine.
1365 */
1366 if (adapter->failover_pending) {
1367 adapter->state = VNIC_CLOSED;
1368 return 0;
1369 }
1370
1371 rc = __ibmvnic_close(netdev);
1372 ibmvnic_cleanup(netdev);
1373
1374 return rc;
1375 }
1376
1377 /**
1378 * build_hdr_data - creates L2/L3/L4 header data buffer
1379 * @hdr_field - bitfield determining needed headers
1380 * @skb - socket buffer
1381 * @hdr_len - array of header lengths
1382 * @tot_len - total length of data
1383 *
1384 * Reads hdr_field to determine which headers are needed by firmware.
1385 * Builds a buffer containing these headers. Saves individual header
1386 * lengths and total buffer length to be used to build descriptors.
1387 */
1388 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1389 int *hdr_len, u8 *hdr_data)
1390 {
1391 int len = 0;
1392 u8 *hdr;
1393
1394 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1395 hdr_len[0] = sizeof(struct vlan_ethhdr);
1396 else
1397 hdr_len[0] = sizeof(struct ethhdr);
1398
1399 if (skb->protocol == htons(ETH_P_IP)) {
1400 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1401 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1402 hdr_len[2] = tcp_hdrlen(skb);
1403 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1404 hdr_len[2] = sizeof(struct udphdr);
1405 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1406 hdr_len[1] = sizeof(struct ipv6hdr);
1407 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1408 hdr_len[2] = tcp_hdrlen(skb);
1409 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1410 hdr_len[2] = sizeof(struct udphdr);
1411 } else if (skb->protocol == htons(ETH_P_ARP)) {
1412 hdr_len[1] = arp_hdr_len(skb->dev);
1413 hdr_len[2] = 0;
1414 }
1415
1416 memset(hdr_data, 0, 120);
1417 if ((hdr_field >> 6) & 1) {
1418 hdr = skb_mac_header(skb);
1419 memcpy(hdr_data, hdr, hdr_len[0]);
1420 len += hdr_len[0];
1421 }
1422
1423 if ((hdr_field >> 5) & 1) {
1424 hdr = skb_network_header(skb);
1425 memcpy(hdr_data + len, hdr, hdr_len[1]);
1426 len += hdr_len[1];
1427 }
1428
1429 if ((hdr_field >> 4) & 1) {
1430 hdr = skb_transport_header(skb);
1431 memcpy(hdr_data + len, hdr, hdr_len[2]);
1432 len += hdr_len[2];
1433 }
1434 return len;
1435 }
1436
1437 /**
1438 * create_hdr_descs - create header and header extension descriptors
1439 * @hdr_field - bitfield determining needed headers
1440 * @data - buffer containing header data
1441 * @len - length of data buffer
1442 * @hdr_len - array of individual header lengths
1443 * @scrq_arr - descriptor array
1444 *
1445 * Creates header and, if needed, header extension descriptors and
1446 * places them in a descriptor array, scrq_arr
1447 */
1448
1449 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1450 union sub_crq *scrq_arr)
1451 {
1452 union sub_crq hdr_desc;
1453 int tmp_len = len;
1454 int num_descs = 0;
1455 u8 *data, *cur;
1456 int tmp;
1457
1458 while (tmp_len > 0) {
1459 cur = hdr_data + len - tmp_len;
1460
1461 memset(&hdr_desc, 0, sizeof(hdr_desc));
1462 if (cur != hdr_data) {
1463 data = hdr_desc.hdr_ext.data;
1464 tmp = tmp_len > 29 ? 29 : tmp_len;
1465 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1466 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1467 hdr_desc.hdr_ext.len = tmp;
1468 } else {
1469 data = hdr_desc.hdr.data;
1470 tmp = tmp_len > 24 ? 24 : tmp_len;
1471 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1472 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1473 hdr_desc.hdr.len = tmp;
1474 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1475 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1476 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1477 hdr_desc.hdr.flag = hdr_field << 1;
1478 }
1479 memcpy(data, cur, tmp);
1480 tmp_len -= tmp;
1481 *scrq_arr = hdr_desc;
1482 scrq_arr++;
1483 num_descs++;
1484 }
1485
1486 return num_descs;
1487 }
1488
1489 /**
1490 * build_hdr_descs_arr - build a header descriptor array
1491 * @skb - socket buffer
1492 * @num_entries - number of descriptors to be sent
1493 * @subcrq - first TX descriptor
1494 * @hdr_field - bit field determining which headers will be sent
1495 *
1496 * This function will build a TX descriptor array with applicable
1497 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1498 */
1499
1500 static void build_hdr_descs_arr(struct sk_buff *skb,
1501 union sub_crq *indir_arr,
1502 int *num_entries, u8 hdr_field)
1503 {
1504 int hdr_len[3] = {0, 0, 0};
1505 u8 hdr_data[140] = {0};
1506 int tot_len;
1507
1508 tot_len = build_hdr_data(hdr_field, skb, hdr_len,
1509 hdr_data);
1510 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1511 indir_arr + 1);
1512 }
1513
1514 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1515 struct net_device *netdev)
1516 {
1517 /* For some backing devices, mishandling of small packets
1518 * can result in a loss of connection or TX stall. Device
1519 * architects recommend that no packet should be smaller
1520 * than the minimum MTU value provided to the driver, so
1521 * pad any packets to that length
1522 */
1523 if (skb->len < netdev->min_mtu)
1524 return skb_put_padto(skb, netdev->min_mtu);
1525
1526 return 0;
1527 }
1528
1529 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
1530 struct ibmvnic_sub_crq_queue *tx_scrq)
1531 {
1532 struct ibmvnic_ind_xmit_queue *ind_bufp;
1533 struct ibmvnic_tx_buff *tx_buff;
1534 struct ibmvnic_tx_pool *tx_pool;
1535 union sub_crq tx_scrq_entry;
1536 int queue_num;
1537 int entries;
1538 int index;
1539 int i;
1540
1541 ind_bufp = &tx_scrq->ind_buf;
1542 entries = (u64)ind_bufp->index;
1543 queue_num = tx_scrq->pool_index;
1544
1545 for (i = entries - 1; i >= 0; --i) {
1546 tx_scrq_entry = ind_bufp->indir_arr[i];
1547 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC)
1548 continue;
1549 index = be32_to_cpu(tx_scrq_entry.v1.correlator);
1550 if (index & IBMVNIC_TSO_POOL_MASK) {
1551 tx_pool = &adapter->tso_pool[queue_num];
1552 index &= ~IBMVNIC_TSO_POOL_MASK;
1553 } else {
1554 tx_pool = &adapter->tx_pool[queue_num];
1555 }
1556 tx_pool->free_map[tx_pool->consumer_index] = index;
1557 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1558 tx_pool->num_buffers - 1 :
1559 tx_pool->consumer_index - 1;
1560 tx_buff = &tx_pool->tx_buff[index];
1561 adapter->netdev->stats.tx_packets--;
1562 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len;
1563 adapter->tx_stats_buffers[queue_num].packets--;
1564 adapter->tx_stats_buffers[queue_num].bytes -=
1565 tx_buff->skb->len;
1566 dev_kfree_skb_any(tx_buff->skb);
1567 tx_buff->skb = NULL;
1568 adapter->netdev->stats.tx_dropped++;
1569 }
1570 ind_bufp->index = 0;
1571 if (atomic_sub_return(entries, &tx_scrq->used) <=
1572 (adapter->req_tx_entries_per_subcrq / 2) &&
1573 __netif_subqueue_stopped(adapter->netdev, queue_num)) {
1574 netif_wake_subqueue(adapter->netdev, queue_num);
1575 netdev_dbg(adapter->netdev, "Started queue %d\n",
1576 queue_num);
1577 }
1578 }
1579
1580 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter,
1581 struct ibmvnic_sub_crq_queue *tx_scrq)
1582 {
1583 struct ibmvnic_ind_xmit_queue *ind_bufp;
1584 u64 dma_addr;
1585 u64 entries;
1586 u64 handle;
1587 int rc;
1588
1589 ind_bufp = &tx_scrq->ind_buf;
1590 dma_addr = (u64)ind_bufp->indir_dma;
1591 entries = (u64)ind_bufp->index;
1592 handle = tx_scrq->handle;
1593
1594 if (!entries)
1595 return 0;
1596 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries);
1597 if (rc)
1598 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq);
1599 else
1600 ind_bufp->index = 0;
1601 return 0;
1602 }
1603
1604 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1605 {
1606 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1607 int queue_num = skb_get_queue_mapping(skb);
1608 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1609 struct device *dev = &adapter->vdev->dev;
1610 struct ibmvnic_ind_xmit_queue *ind_bufp;
1611 struct ibmvnic_tx_buff *tx_buff = NULL;
1612 struct ibmvnic_sub_crq_queue *tx_scrq;
1613 struct ibmvnic_tx_pool *tx_pool;
1614 unsigned int tx_send_failed = 0;
1615 netdev_tx_t ret = NETDEV_TX_OK;
1616 unsigned int tx_map_failed = 0;
1617 union sub_crq indir_arr[16];
1618 unsigned int tx_dropped = 0;
1619 unsigned int tx_packets = 0;
1620 unsigned int tx_bytes = 0;
1621 dma_addr_t data_dma_addr;
1622 struct netdev_queue *txq;
1623 unsigned long lpar_rc;
1624 union sub_crq tx_crq;
1625 unsigned int offset;
1626 int num_entries = 1;
1627 unsigned char *dst;
1628 int index = 0;
1629 u8 proto = 0;
1630
1631 tx_scrq = adapter->tx_scrq[queue_num];
1632 txq = netdev_get_tx_queue(netdev, queue_num);
1633 ind_bufp = &tx_scrq->ind_buf;
1634
1635 if (test_bit(0, &adapter->resetting)) {
1636 if (!netif_subqueue_stopped(netdev, skb))
1637 netif_stop_subqueue(netdev, queue_num);
1638 dev_kfree_skb_any(skb);
1639
1640 tx_send_failed++;
1641 tx_dropped++;
1642 ret = NETDEV_TX_OK;
1643 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1644 goto out;
1645 }
1646
1647 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1648 tx_dropped++;
1649 tx_send_failed++;
1650 ret = NETDEV_TX_OK;
1651 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1652 goto out;
1653 }
1654 if (skb_is_gso(skb))
1655 tx_pool = &adapter->tso_pool[queue_num];
1656 else
1657 tx_pool = &adapter->tx_pool[queue_num];
1658
1659 index = tx_pool->free_map[tx_pool->consumer_index];
1660
1661 if (index == IBMVNIC_INVALID_MAP) {
1662 dev_kfree_skb_any(skb);
1663 tx_send_failed++;
1664 tx_dropped++;
1665 ret = NETDEV_TX_OK;
1666 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1667 goto out;
1668 }
1669
1670 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1671
1672 offset = index * tx_pool->buf_size;
1673 dst = tx_pool->long_term_buff.buff + offset;
1674 memset(dst, 0, tx_pool->buf_size);
1675 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1676
1677 if (skb_shinfo(skb)->nr_frags) {
1678 int cur, i;
1679
1680 /* Copy the head */
1681 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1682 cur = skb_headlen(skb);
1683
1684 /* Copy the frags */
1685 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1686 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1687
1688 memcpy(dst + cur,
1689 page_address(skb_frag_page(frag)) +
1690 skb_frag_off(frag), skb_frag_size(frag));
1691 cur += skb_frag_size(frag);
1692 }
1693 } else {
1694 skb_copy_from_linear_data(skb, dst, skb->len);
1695 }
1696
1697 tx_pool->consumer_index =
1698 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1699
1700 tx_buff = &tx_pool->tx_buff[index];
1701 tx_buff->skb = skb;
1702 tx_buff->index = index;
1703 tx_buff->pool_index = queue_num;
1704
1705 memset(&tx_crq, 0, sizeof(tx_crq));
1706 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1707 tx_crq.v1.type = IBMVNIC_TX_DESC;
1708 tx_crq.v1.n_crq_elem = 1;
1709 tx_crq.v1.n_sge = 1;
1710 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1711
1712 if (skb_is_gso(skb))
1713 tx_crq.v1.correlator =
1714 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1715 else
1716 tx_crq.v1.correlator = cpu_to_be32(index);
1717 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1718 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1719 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1720
1721 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1722 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1723 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1724 }
1725
1726 if (skb->protocol == htons(ETH_P_IP)) {
1727 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1728 proto = ip_hdr(skb)->protocol;
1729 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1730 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1731 proto = ipv6_hdr(skb)->nexthdr;
1732 }
1733
1734 if (proto == IPPROTO_TCP)
1735 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1736 else if (proto == IPPROTO_UDP)
1737 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1738
1739 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1740 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1741 hdrs += 2;
1742 }
1743 if (skb_is_gso(skb)) {
1744 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1745 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1746 hdrs += 2;
1747 }
1748
1749 if ((*hdrs >> 7) & 1)
1750 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs);
1751
1752 tx_crq.v1.n_crq_elem = num_entries;
1753 tx_buff->num_entries = num_entries;
1754 /* flush buffer if current entry can not fit */
1755 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) {
1756 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1757 if (lpar_rc != H_SUCCESS)
1758 goto tx_flush_err;
1759 }
1760
1761 indir_arr[0] = tx_crq;
1762 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0],
1763 num_entries * sizeof(struct ibmvnic_generic_scrq));
1764 ind_bufp->index += num_entries;
1765 if (__netdev_tx_sent_queue(txq, skb->len,
1766 netdev_xmit_more() &&
1767 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) {
1768 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1769 if (lpar_rc != H_SUCCESS)
1770 goto tx_err;
1771 }
1772
1773 if (atomic_add_return(num_entries, &tx_scrq->used)
1774 >= adapter->req_tx_entries_per_subcrq) {
1775 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1776 netif_stop_subqueue(netdev, queue_num);
1777 }
1778
1779 tx_packets++;
1780 tx_bytes += skb->len;
1781 txq->trans_start = jiffies;
1782 ret = NETDEV_TX_OK;
1783 goto out;
1784
1785 tx_flush_err:
1786 dev_kfree_skb_any(skb);
1787 tx_buff->skb = NULL;
1788 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1789 tx_pool->num_buffers - 1 :
1790 tx_pool->consumer_index - 1;
1791 tx_dropped++;
1792 tx_err:
1793 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1794 dev_err_ratelimited(dev, "tx: send failed\n");
1795
1796 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1797 /* Disable TX and report carrier off if queue is closed
1798 * or pending failover.
1799 * Firmware guarantees that a signal will be sent to the
1800 * driver, triggering a reset or some other action.
1801 */
1802 netif_tx_stop_all_queues(netdev);
1803 netif_carrier_off(netdev);
1804 }
1805 out:
1806 netdev->stats.tx_dropped += tx_dropped;
1807 netdev->stats.tx_bytes += tx_bytes;
1808 netdev->stats.tx_packets += tx_packets;
1809 adapter->tx_send_failed += tx_send_failed;
1810 adapter->tx_map_failed += tx_map_failed;
1811 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1812 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1813 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1814
1815 return ret;
1816 }
1817
1818 static void ibmvnic_set_multi(struct net_device *netdev)
1819 {
1820 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1821 struct netdev_hw_addr *ha;
1822 union ibmvnic_crq crq;
1823
1824 memset(&crq, 0, sizeof(crq));
1825 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1826 crq.request_capability.cmd = REQUEST_CAPABILITY;
1827
1828 if (netdev->flags & IFF_PROMISC) {
1829 if (!adapter->promisc_supported)
1830 return;
1831 } else {
1832 if (netdev->flags & IFF_ALLMULTI) {
1833 /* Accept all multicast */
1834 memset(&crq, 0, sizeof(crq));
1835 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1836 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1837 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1838 ibmvnic_send_crq(adapter, &crq);
1839 } else if (netdev_mc_empty(netdev)) {
1840 /* Reject all multicast */
1841 memset(&crq, 0, sizeof(crq));
1842 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1843 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1844 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1845 ibmvnic_send_crq(adapter, &crq);
1846 } else {
1847 /* Accept one or more multicast(s) */
1848 netdev_for_each_mc_addr(ha, netdev) {
1849 memset(&crq, 0, sizeof(crq));
1850 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1851 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1852 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1853 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1854 ha->addr);
1855 ibmvnic_send_crq(adapter, &crq);
1856 }
1857 }
1858 }
1859 }
1860
1861 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1862 {
1863 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1864 union ibmvnic_crq crq;
1865 int rc;
1866
1867 if (!is_valid_ether_addr(dev_addr)) {
1868 rc = -EADDRNOTAVAIL;
1869 goto err;
1870 }
1871
1872 memset(&crq, 0, sizeof(crq));
1873 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1874 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1875 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1876
1877 mutex_lock(&adapter->fw_lock);
1878 adapter->fw_done_rc = 0;
1879 reinit_completion(&adapter->fw_done);
1880
1881 rc = ibmvnic_send_crq(adapter, &crq);
1882 if (rc) {
1883 rc = -EIO;
1884 mutex_unlock(&adapter->fw_lock);
1885 goto err;
1886 }
1887
1888 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1889 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1890 if (rc || adapter->fw_done_rc) {
1891 rc = -EIO;
1892 mutex_unlock(&adapter->fw_lock);
1893 goto err;
1894 }
1895 mutex_unlock(&adapter->fw_lock);
1896 return 0;
1897 err:
1898 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1899 return rc;
1900 }
1901
1902 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1903 {
1904 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1905 struct sockaddr *addr = p;
1906 int rc;
1907
1908 rc = 0;
1909 if (!is_valid_ether_addr(addr->sa_data))
1910 return -EADDRNOTAVAIL;
1911
1912 if (adapter->state != VNIC_PROBED) {
1913 ether_addr_copy(adapter->mac_addr, addr->sa_data);
1914 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1915 }
1916
1917 return rc;
1918 }
1919
1920 /**
1921 * do_change_param_reset returns zero if we are able to keep processing reset
1922 * events, or non-zero if we hit a fatal error and must halt.
1923 */
1924 static int do_change_param_reset(struct ibmvnic_adapter *adapter,
1925 struct ibmvnic_rwi *rwi,
1926 u32 reset_state)
1927 {
1928 struct net_device *netdev = adapter->netdev;
1929 int i, rc;
1930
1931 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
1932 rwi->reset_reason);
1933
1934 netif_carrier_off(netdev);
1935 adapter->reset_reason = rwi->reset_reason;
1936
1937 ibmvnic_cleanup(netdev);
1938
1939 if (reset_state == VNIC_OPEN) {
1940 rc = __ibmvnic_close(netdev);
1941 if (rc)
1942 return rc;
1943 }
1944
1945 release_resources(adapter);
1946 release_sub_crqs(adapter, 1);
1947 release_crq_queue(adapter);
1948
1949 adapter->state = VNIC_PROBED;
1950
1951 rc = init_crq_queue(adapter);
1952
1953 if (rc) {
1954 netdev_err(adapter->netdev,
1955 "Couldn't initialize crq. rc=%d\n", rc);
1956 return rc;
1957 }
1958
1959 rc = ibmvnic_reset_init(adapter, true);
1960 if (rc)
1961 return IBMVNIC_INIT_FAILED;
1962
1963 /* If the adapter was in PROBE state prior to the reset,
1964 * exit here.
1965 */
1966 if (reset_state == VNIC_PROBED)
1967 return 0;
1968
1969 rc = ibmvnic_login(netdev);
1970 if (rc) {
1971 adapter->state = reset_state;
1972 return rc;
1973 }
1974
1975 rc = init_resources(adapter);
1976 if (rc)
1977 return rc;
1978
1979 ibmvnic_disable_irqs(adapter);
1980
1981 adapter->state = VNIC_CLOSED;
1982
1983 if (reset_state == VNIC_CLOSED)
1984 return 0;
1985
1986 rc = __ibmvnic_open(netdev);
1987 if (rc)
1988 return IBMVNIC_OPEN_FAILED;
1989
1990 /* refresh device's multicast list */
1991 ibmvnic_set_multi(netdev);
1992
1993 /* kick napi */
1994 for (i = 0; i < adapter->req_rx_queues; i++)
1995 napi_schedule(&adapter->napi[i]);
1996
1997 return 0;
1998 }
1999
2000 /**
2001 * do_reset returns zero if we are able to keep processing reset events, or
2002 * non-zero if we hit a fatal error and must halt.
2003 */
2004 static int do_reset(struct ibmvnic_adapter *adapter,
2005 struct ibmvnic_rwi *rwi, u32 reset_state)
2006 {
2007 u64 old_num_rx_queues, old_num_tx_queues;
2008 u64 old_num_rx_slots, old_num_tx_slots;
2009 struct net_device *netdev = adapter->netdev;
2010 int i, rc;
2011
2012 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
2013 rwi->reset_reason);
2014
2015 rtnl_lock();
2016 /*
2017 * Now that we have the rtnl lock, clear any pending failover.
2018 * This will ensure ibmvnic_open() has either completed or will
2019 * block until failover is complete.
2020 */
2021 if (rwi->reset_reason == VNIC_RESET_FAILOVER)
2022 adapter->failover_pending = false;
2023
2024 netif_carrier_off(netdev);
2025 adapter->reset_reason = rwi->reset_reason;
2026
2027 old_num_rx_queues = adapter->req_rx_queues;
2028 old_num_tx_queues = adapter->req_tx_queues;
2029 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
2030 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
2031
2032 ibmvnic_cleanup(netdev);
2033
2034 if (reset_state == VNIC_OPEN &&
2035 adapter->reset_reason != VNIC_RESET_MOBILITY &&
2036 adapter->reset_reason != VNIC_RESET_FAILOVER) {
2037 adapter->state = VNIC_CLOSING;
2038
2039 /* Release the RTNL lock before link state change and
2040 * re-acquire after the link state change to allow
2041 * linkwatch_event to grab the RTNL lock and run during
2042 * a reset.
2043 */
2044 rtnl_unlock();
2045 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
2046 rtnl_lock();
2047 if (rc)
2048 goto out;
2049
2050 if (adapter->state != VNIC_CLOSING) {
2051 rc = -1;
2052 goto out;
2053 }
2054
2055 adapter->state = VNIC_CLOSED;
2056 }
2057
2058 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
2059 /* remove the closed state so when we call open it appears
2060 * we are coming from the probed state.
2061 */
2062 adapter->state = VNIC_PROBED;
2063
2064 if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
2065 rc = ibmvnic_reenable_crq_queue(adapter);
2066 release_sub_crqs(adapter, 1);
2067 } else {
2068 rc = ibmvnic_reset_crq(adapter);
2069 if (rc == H_CLOSED || rc == H_SUCCESS) {
2070 rc = vio_enable_interrupts(adapter->vdev);
2071 if (rc)
2072 netdev_err(adapter->netdev,
2073 "Reset failed to enable interrupts. rc=%d\n",
2074 rc);
2075 }
2076 }
2077
2078 if (rc) {
2079 netdev_err(adapter->netdev,
2080 "Reset couldn't initialize crq. rc=%d\n", rc);
2081 goto out;
2082 }
2083
2084 rc = ibmvnic_reset_init(adapter, true);
2085 if (rc) {
2086 rc = IBMVNIC_INIT_FAILED;
2087 goto out;
2088 }
2089
2090 /* If the adapter was in PROBE state prior to the reset,
2091 * exit here.
2092 */
2093 if (reset_state == VNIC_PROBED) {
2094 rc = 0;
2095 goto out;
2096 }
2097
2098 rc = ibmvnic_login(netdev);
2099 if (rc) {
2100 adapter->state = reset_state;
2101 goto out;
2102 }
2103
2104 if (adapter->req_rx_queues != old_num_rx_queues ||
2105 adapter->req_tx_queues != old_num_tx_queues ||
2106 adapter->req_rx_add_entries_per_subcrq !=
2107 old_num_rx_slots ||
2108 adapter->req_tx_entries_per_subcrq !=
2109 old_num_tx_slots ||
2110 !adapter->rx_pool ||
2111 !adapter->tso_pool ||
2112 !adapter->tx_pool) {
2113 release_rx_pools(adapter);
2114 release_tx_pools(adapter);
2115 release_napi(adapter);
2116 release_vpd_data(adapter);
2117
2118 rc = init_resources(adapter);
2119 if (rc)
2120 goto out;
2121
2122 } else {
2123 rc = reset_tx_pools(adapter);
2124 if (rc) {
2125 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
2126 rc);
2127 goto out;
2128 }
2129
2130 rc = reset_rx_pools(adapter);
2131 if (rc) {
2132 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
2133 rc);
2134 goto out;
2135 }
2136 }
2137 ibmvnic_disable_irqs(adapter);
2138 }
2139 adapter->state = VNIC_CLOSED;
2140
2141 if (reset_state == VNIC_CLOSED) {
2142 rc = 0;
2143 goto out;
2144 }
2145
2146 rc = __ibmvnic_open(netdev);
2147 if (rc) {
2148 rc = IBMVNIC_OPEN_FAILED;
2149 goto out;
2150 }
2151
2152 /* refresh device's multicast list */
2153 ibmvnic_set_multi(netdev);
2154
2155 /* kick napi */
2156 for (i = 0; i < adapter->req_rx_queues; i++)
2157 napi_schedule(&adapter->napi[i]);
2158
2159 if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
2160 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2161 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2162 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
2163 }
2164
2165 rc = 0;
2166
2167 out:
2168 rtnl_unlock();
2169
2170 return rc;
2171 }
2172
2173 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2174 struct ibmvnic_rwi *rwi, u32 reset_state)
2175 {
2176 struct net_device *netdev = adapter->netdev;
2177 int rc;
2178
2179 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2180 rwi->reset_reason);
2181
2182 netif_carrier_off(netdev);
2183 adapter->reset_reason = rwi->reset_reason;
2184
2185 ibmvnic_cleanup(netdev);
2186 release_resources(adapter);
2187 release_sub_crqs(adapter, 0);
2188 release_crq_queue(adapter);
2189
2190 /* remove the closed state so when we call open it appears
2191 * we are coming from the probed state.
2192 */
2193 adapter->state = VNIC_PROBED;
2194
2195 reinit_completion(&adapter->init_done);
2196 rc = init_crq_queue(adapter);
2197 if (rc) {
2198 netdev_err(adapter->netdev,
2199 "Couldn't initialize crq. rc=%d\n", rc);
2200 return rc;
2201 }
2202
2203 rc = ibmvnic_reset_init(adapter, false);
2204 if (rc)
2205 return rc;
2206
2207 /* If the adapter was in PROBE state prior to the reset,
2208 * exit here.
2209 */
2210 if (reset_state == VNIC_PROBED)
2211 return 0;
2212
2213 rc = ibmvnic_login(netdev);
2214 if (rc) {
2215 adapter->state = VNIC_PROBED;
2216 return 0;
2217 }
2218
2219 rc = init_resources(adapter);
2220 if (rc)
2221 return rc;
2222
2223 ibmvnic_disable_irqs(adapter);
2224 adapter->state = VNIC_CLOSED;
2225
2226 if (reset_state == VNIC_CLOSED)
2227 return 0;
2228
2229 rc = __ibmvnic_open(netdev);
2230 if (rc)
2231 return IBMVNIC_OPEN_FAILED;
2232
2233 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2234 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
2235
2236 return 0;
2237 }
2238
2239 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2240 {
2241 struct ibmvnic_rwi *rwi;
2242 unsigned long flags;
2243
2244 spin_lock_irqsave(&adapter->rwi_lock, flags);
2245
2246 if (!list_empty(&adapter->rwi_list)) {
2247 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2248 list);
2249 list_del(&rwi->list);
2250 } else {
2251 rwi = NULL;
2252 }
2253
2254 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2255 return rwi;
2256 }
2257
2258 static void free_all_rwi(struct ibmvnic_adapter *adapter)
2259 {
2260 struct ibmvnic_rwi *rwi;
2261
2262 rwi = get_next_rwi(adapter);
2263 while (rwi) {
2264 kfree(rwi);
2265 rwi = get_next_rwi(adapter);
2266 }
2267 }
2268
2269 static void __ibmvnic_reset(struct work_struct *work)
2270 {
2271 struct ibmvnic_rwi *rwi;
2272 struct ibmvnic_adapter *adapter;
2273 bool saved_state = false;
2274 unsigned long flags;
2275 u32 reset_state;
2276 int rc = 0;
2277
2278 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2279
2280 if (test_and_set_bit_lock(0, &adapter->resetting)) {
2281 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2282 IBMVNIC_RESET_DELAY);
2283 return;
2284 }
2285
2286 rwi = get_next_rwi(adapter);
2287 while (rwi) {
2288 spin_lock_irqsave(&adapter->state_lock, flags);
2289
2290 if (adapter->state == VNIC_REMOVING ||
2291 adapter->state == VNIC_REMOVED) {
2292 spin_unlock_irqrestore(&adapter->state_lock, flags);
2293 kfree(rwi);
2294 rc = EBUSY;
2295 break;
2296 }
2297
2298 if (!saved_state) {
2299 reset_state = adapter->state;
2300 saved_state = true;
2301 }
2302 spin_unlock_irqrestore(&adapter->state_lock, flags);
2303
2304 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2305 /* CHANGE_PARAM requestor holds rtnl_lock */
2306 rc = do_change_param_reset(adapter, rwi, reset_state);
2307 } else if (adapter->force_reset_recovery) {
2308 /*
2309 * Since we are doing a hard reset now, clear the
2310 * failover_pending flag so we don't ignore any
2311 * future MOBILITY or other resets.
2312 */
2313 adapter->failover_pending = false;
2314
2315 /* Transport event occurred during previous reset */
2316 if (adapter->wait_for_reset) {
2317 /* Previous was CHANGE_PARAM; caller locked */
2318 adapter->force_reset_recovery = false;
2319 rc = do_hard_reset(adapter, rwi, reset_state);
2320 } else {
2321 rtnl_lock();
2322 adapter->force_reset_recovery = false;
2323 rc = do_hard_reset(adapter, rwi, reset_state);
2324 rtnl_unlock();
2325 }
2326 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL &&
2327 adapter->from_passive_init)) {
2328 rc = do_reset(adapter, rwi, reset_state);
2329 }
2330 kfree(rwi);
2331 if (rc == IBMVNIC_OPEN_FAILED) {
2332 if (list_empty(&adapter->rwi_list))
2333 adapter->state = VNIC_CLOSED;
2334 else
2335 adapter->state = reset_state;
2336 rc = 0;
2337 } else if (rc && rc != IBMVNIC_INIT_FAILED &&
2338 !adapter->force_reset_recovery)
2339 break;
2340
2341 rwi = get_next_rwi(adapter);
2342
2343 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2344 rwi->reset_reason == VNIC_RESET_MOBILITY))
2345 adapter->force_reset_recovery = true;
2346 }
2347
2348 if (adapter->wait_for_reset) {
2349 adapter->reset_done_rc = rc;
2350 complete(&adapter->reset_done);
2351 }
2352
2353 if (rc) {
2354 netdev_dbg(adapter->netdev, "Reset failed\n");
2355 free_all_rwi(adapter);
2356 }
2357
2358 clear_bit_unlock(0, &adapter->resetting);
2359 }
2360
2361 static void __ibmvnic_delayed_reset(struct work_struct *work)
2362 {
2363 struct ibmvnic_adapter *adapter;
2364
2365 adapter = container_of(work, struct ibmvnic_adapter,
2366 ibmvnic_delayed_reset.work);
2367 __ibmvnic_reset(&adapter->ibmvnic_reset);
2368 }
2369
2370 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2371 enum ibmvnic_reset_reason reason)
2372 {
2373 struct list_head *entry, *tmp_entry;
2374 struct ibmvnic_rwi *rwi, *tmp;
2375 struct net_device *netdev = adapter->netdev;
2376 unsigned long flags;
2377 int ret;
2378
2379 /*
2380 * If failover is pending don't schedule any other reset.
2381 * Instead let the failover complete. If there is already a
2382 * a failover reset scheduled, we will detect and drop the
2383 * duplicate reset when walking the ->rwi_list below.
2384 */
2385 if (adapter->state == VNIC_REMOVING ||
2386 adapter->state == VNIC_REMOVED ||
2387 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
2388 ret = EBUSY;
2389 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2390 goto err;
2391 }
2392
2393 if (adapter->state == VNIC_PROBING) {
2394 netdev_warn(netdev, "Adapter reset during probe\n");
2395 ret = adapter->init_done_rc = EAGAIN;
2396 goto err;
2397 }
2398
2399 spin_lock_irqsave(&adapter->rwi_lock, flags);
2400
2401 list_for_each(entry, &adapter->rwi_list) {
2402 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2403 if (tmp->reset_reason == reason) {
2404 netdev_dbg(netdev, "Skipping matching reset\n");
2405 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2406 ret = EBUSY;
2407 goto err;
2408 }
2409 }
2410
2411 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2412 if (!rwi) {
2413 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2414 ibmvnic_close(netdev);
2415 ret = ENOMEM;
2416 goto err;
2417 }
2418 /* if we just received a transport event,
2419 * flush reset queue and process this reset
2420 */
2421 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2422 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2423 list_del(entry);
2424 }
2425 rwi->reset_reason = reason;
2426 list_add_tail(&rwi->list, &adapter->rwi_list);
2427 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2428 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2429 schedule_work(&adapter->ibmvnic_reset);
2430
2431 return 0;
2432 err:
2433 return -ret;
2434 }
2435
2436 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2437 {
2438 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2439
2440 if (test_bit(0, &adapter->resetting)) {
2441 netdev_err(adapter->netdev,
2442 "Adapter is resetting, skip timeout reset\n");
2443 return;
2444 }
2445
2446 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2447 }
2448
2449 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2450 struct ibmvnic_rx_buff *rx_buff)
2451 {
2452 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2453
2454 rx_buff->skb = NULL;
2455
2456 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2457 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2458
2459 atomic_dec(&pool->available);
2460 }
2461
2462 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2463 {
2464 struct ibmvnic_sub_crq_queue *rx_scrq;
2465 struct ibmvnic_adapter *adapter;
2466 struct net_device *netdev;
2467 int frames_processed;
2468 int scrq_num;
2469
2470 netdev = napi->dev;
2471 adapter = netdev_priv(netdev);
2472 scrq_num = (int)(napi - adapter->napi);
2473 frames_processed = 0;
2474 rx_scrq = adapter->rx_scrq[scrq_num];
2475
2476 restart_poll:
2477 while (frames_processed < budget) {
2478 struct sk_buff *skb;
2479 struct ibmvnic_rx_buff *rx_buff;
2480 union sub_crq *next;
2481 u32 length;
2482 u16 offset;
2483 u8 flags = 0;
2484
2485 if (unlikely(test_bit(0, &adapter->resetting) &&
2486 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2487 enable_scrq_irq(adapter, rx_scrq);
2488 napi_complete_done(napi, frames_processed);
2489 return frames_processed;
2490 }
2491
2492 if (!pending_scrq(adapter, rx_scrq))
2493 break;
2494 next = ibmvnic_next_scrq(adapter, rx_scrq);
2495 rx_buff =
2496 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2497 rx_comp.correlator);
2498 /* do error checking */
2499 if (next->rx_comp.rc) {
2500 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2501 be16_to_cpu(next->rx_comp.rc));
2502 /* free the entry */
2503 next->rx_comp.first = 0;
2504 dev_kfree_skb_any(rx_buff->skb);
2505 remove_buff_from_pool(adapter, rx_buff);
2506 continue;
2507 } else if (!rx_buff->skb) {
2508 /* free the entry */
2509 next->rx_comp.first = 0;
2510 remove_buff_from_pool(adapter, rx_buff);
2511 continue;
2512 }
2513
2514 length = be32_to_cpu(next->rx_comp.len);
2515 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2516 flags = next->rx_comp.flags;
2517 skb = rx_buff->skb;
2518 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2519 length);
2520
2521 /* VLAN Header has been stripped by the system firmware and
2522 * needs to be inserted by the driver
2523 */
2524 if (adapter->rx_vlan_header_insertion &&
2525 (flags & IBMVNIC_VLAN_STRIPPED))
2526 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2527 ntohs(next->rx_comp.vlan_tci));
2528
2529 /* free the entry */
2530 next->rx_comp.first = 0;
2531 remove_buff_from_pool(adapter, rx_buff);
2532
2533 skb_put(skb, length);
2534 skb->protocol = eth_type_trans(skb, netdev);
2535 skb_record_rx_queue(skb, scrq_num);
2536
2537 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2538 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2539 skb->ip_summed = CHECKSUM_UNNECESSARY;
2540 }
2541
2542 length = skb->len;
2543 napi_gro_receive(napi, skb); /* send it up */
2544 netdev->stats.rx_packets++;
2545 netdev->stats.rx_bytes += length;
2546 adapter->rx_stats_buffers[scrq_num].packets++;
2547 adapter->rx_stats_buffers[scrq_num].bytes += length;
2548 frames_processed++;
2549 }
2550
2551 if (adapter->state != VNIC_CLOSING &&
2552 ((atomic_read(&adapter->rx_pool[scrq_num].available) <
2553 adapter->req_rx_add_entries_per_subcrq / 2) ||
2554 frames_processed < budget))
2555 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2556 if (frames_processed < budget) {
2557 if (napi_complete_done(napi, frames_processed)) {
2558 enable_scrq_irq(adapter, rx_scrq);
2559 if (pending_scrq(adapter, rx_scrq)) {
2560 rmb();
2561 if (napi_reschedule(napi)) {
2562 disable_scrq_irq(adapter, rx_scrq);
2563 goto restart_poll;
2564 }
2565 }
2566 }
2567 }
2568 return frames_processed;
2569 }
2570
2571 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2572 {
2573 int rc, ret;
2574
2575 adapter->fallback.mtu = adapter->req_mtu;
2576 adapter->fallback.rx_queues = adapter->req_rx_queues;
2577 adapter->fallback.tx_queues = adapter->req_tx_queues;
2578 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2579 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2580
2581 reinit_completion(&adapter->reset_done);
2582 adapter->wait_for_reset = true;
2583 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2584
2585 if (rc) {
2586 ret = rc;
2587 goto out;
2588 }
2589 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2590 if (rc) {
2591 ret = -ENODEV;
2592 goto out;
2593 }
2594
2595 ret = 0;
2596 if (adapter->reset_done_rc) {
2597 ret = -EIO;
2598 adapter->desired.mtu = adapter->fallback.mtu;
2599 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2600 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2601 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2602 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2603
2604 reinit_completion(&adapter->reset_done);
2605 adapter->wait_for_reset = true;
2606 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2607 if (rc) {
2608 ret = rc;
2609 goto out;
2610 }
2611 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2612 60000);
2613 if (rc) {
2614 ret = -ENODEV;
2615 goto out;
2616 }
2617 }
2618 out:
2619 adapter->wait_for_reset = false;
2620
2621 return ret;
2622 }
2623
2624 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2625 {
2626 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2627
2628 adapter->desired.mtu = new_mtu + ETH_HLEN;
2629
2630 return wait_for_reset(adapter);
2631 }
2632
2633 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2634 struct net_device *dev,
2635 netdev_features_t features)
2636 {
2637 /* Some backing hardware adapters can not
2638 * handle packets with a MSS less than 224
2639 * or with only one segment.
2640 */
2641 if (skb_is_gso(skb)) {
2642 if (skb_shinfo(skb)->gso_size < 224 ||
2643 skb_shinfo(skb)->gso_segs == 1)
2644 features &= ~NETIF_F_GSO_MASK;
2645 }
2646
2647 return features;
2648 }
2649
2650 static const struct net_device_ops ibmvnic_netdev_ops = {
2651 .ndo_open = ibmvnic_open,
2652 .ndo_stop = ibmvnic_close,
2653 .ndo_start_xmit = ibmvnic_xmit,
2654 .ndo_set_rx_mode = ibmvnic_set_multi,
2655 .ndo_set_mac_address = ibmvnic_set_mac,
2656 .ndo_validate_addr = eth_validate_addr,
2657 .ndo_tx_timeout = ibmvnic_tx_timeout,
2658 .ndo_change_mtu = ibmvnic_change_mtu,
2659 .ndo_features_check = ibmvnic_features_check,
2660 };
2661
2662 /* ethtool functions */
2663
2664 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2665 struct ethtool_link_ksettings *cmd)
2666 {
2667 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2668 int rc;
2669
2670 rc = send_query_phys_parms(adapter);
2671 if (rc) {
2672 adapter->speed = SPEED_UNKNOWN;
2673 adapter->duplex = DUPLEX_UNKNOWN;
2674 }
2675 cmd->base.speed = adapter->speed;
2676 cmd->base.duplex = adapter->duplex;
2677 cmd->base.port = PORT_FIBRE;
2678 cmd->base.phy_address = 0;
2679 cmd->base.autoneg = AUTONEG_ENABLE;
2680
2681 return 0;
2682 }
2683
2684 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2685 struct ethtool_drvinfo *info)
2686 {
2687 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2688
2689 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2690 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2691 strlcpy(info->fw_version, adapter->fw_version,
2692 sizeof(info->fw_version));
2693 }
2694
2695 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2696 {
2697 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2698
2699 return adapter->msg_enable;
2700 }
2701
2702 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2703 {
2704 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2705
2706 adapter->msg_enable = data;
2707 }
2708
2709 static u32 ibmvnic_get_link(struct net_device *netdev)
2710 {
2711 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2712
2713 /* Don't need to send a query because we request a logical link up at
2714 * init and then we wait for link state indications
2715 */
2716 return adapter->logical_link_state;
2717 }
2718
2719 static void ibmvnic_get_ringparam(struct net_device *netdev,
2720 struct ethtool_ringparam *ring)
2721 {
2722 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2723
2724 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2725 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2726 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2727 } else {
2728 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2729 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2730 }
2731 ring->rx_mini_max_pending = 0;
2732 ring->rx_jumbo_max_pending = 0;
2733 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2734 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2735 ring->rx_mini_pending = 0;
2736 ring->rx_jumbo_pending = 0;
2737 }
2738
2739 static int ibmvnic_set_ringparam(struct net_device *netdev,
2740 struct ethtool_ringparam *ring)
2741 {
2742 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2743 int ret;
2744
2745 ret = 0;
2746 adapter->desired.rx_entries = ring->rx_pending;
2747 adapter->desired.tx_entries = ring->tx_pending;
2748
2749 ret = wait_for_reset(adapter);
2750
2751 if (!ret &&
2752 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2753 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2754 netdev_info(netdev,
2755 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2756 ring->rx_pending, ring->tx_pending,
2757 adapter->req_rx_add_entries_per_subcrq,
2758 adapter->req_tx_entries_per_subcrq);
2759 return ret;
2760 }
2761
2762 static void ibmvnic_get_channels(struct net_device *netdev,
2763 struct ethtool_channels *channels)
2764 {
2765 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2766
2767 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2768 channels->max_rx = adapter->max_rx_queues;
2769 channels->max_tx = adapter->max_tx_queues;
2770 } else {
2771 channels->max_rx = IBMVNIC_MAX_QUEUES;
2772 channels->max_tx = IBMVNIC_MAX_QUEUES;
2773 }
2774
2775 channels->max_other = 0;
2776 channels->max_combined = 0;
2777 channels->rx_count = adapter->req_rx_queues;
2778 channels->tx_count = adapter->req_tx_queues;
2779 channels->other_count = 0;
2780 channels->combined_count = 0;
2781 }
2782
2783 static int ibmvnic_set_channels(struct net_device *netdev,
2784 struct ethtool_channels *channels)
2785 {
2786 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2787 int ret;
2788
2789 ret = 0;
2790 adapter->desired.rx_queues = channels->rx_count;
2791 adapter->desired.tx_queues = channels->tx_count;
2792
2793 ret = wait_for_reset(adapter);
2794
2795 if (!ret &&
2796 (adapter->req_rx_queues != channels->rx_count ||
2797 adapter->req_tx_queues != channels->tx_count))
2798 netdev_info(netdev,
2799 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2800 channels->rx_count, channels->tx_count,
2801 adapter->req_rx_queues, adapter->req_tx_queues);
2802 return ret;
2803
2804 }
2805
2806 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2807 {
2808 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2809 int i;
2810
2811 switch (stringset) {
2812 case ETH_SS_STATS:
2813 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2814 i++, data += ETH_GSTRING_LEN)
2815 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2816
2817 for (i = 0; i < adapter->req_tx_queues; i++) {
2818 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2819 data += ETH_GSTRING_LEN;
2820
2821 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2822 data += ETH_GSTRING_LEN;
2823
2824 snprintf(data, ETH_GSTRING_LEN,
2825 "tx%d_dropped_packets", i);
2826 data += ETH_GSTRING_LEN;
2827 }
2828
2829 for (i = 0; i < adapter->req_rx_queues; i++) {
2830 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2831 data += ETH_GSTRING_LEN;
2832
2833 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2834 data += ETH_GSTRING_LEN;
2835
2836 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2837 data += ETH_GSTRING_LEN;
2838 }
2839 break;
2840
2841 case ETH_SS_PRIV_FLAGS:
2842 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2843 strcpy(data + i * ETH_GSTRING_LEN,
2844 ibmvnic_priv_flags[i]);
2845 break;
2846 default:
2847 return;
2848 }
2849 }
2850
2851 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2852 {
2853 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2854
2855 switch (sset) {
2856 case ETH_SS_STATS:
2857 return ARRAY_SIZE(ibmvnic_stats) +
2858 adapter->req_tx_queues * NUM_TX_STATS +
2859 adapter->req_rx_queues * NUM_RX_STATS;
2860 case ETH_SS_PRIV_FLAGS:
2861 return ARRAY_SIZE(ibmvnic_priv_flags);
2862 default:
2863 return -EOPNOTSUPP;
2864 }
2865 }
2866
2867 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2868 struct ethtool_stats *stats, u64 *data)
2869 {
2870 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2871 union ibmvnic_crq crq;
2872 int i, j;
2873 int rc;
2874
2875 memset(&crq, 0, sizeof(crq));
2876 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2877 crq.request_statistics.cmd = REQUEST_STATISTICS;
2878 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2879 crq.request_statistics.len =
2880 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2881
2882 /* Wait for data to be written */
2883 reinit_completion(&adapter->stats_done);
2884 rc = ibmvnic_send_crq(adapter, &crq);
2885 if (rc)
2886 return;
2887 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2888 if (rc)
2889 return;
2890
2891 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2892 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2893 ibmvnic_stats[i].offset));
2894
2895 for (j = 0; j < adapter->req_tx_queues; j++) {
2896 data[i] = adapter->tx_stats_buffers[j].packets;
2897 i++;
2898 data[i] = adapter->tx_stats_buffers[j].bytes;
2899 i++;
2900 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2901 i++;
2902 }
2903
2904 for (j = 0; j < adapter->req_rx_queues; j++) {
2905 data[i] = adapter->rx_stats_buffers[j].packets;
2906 i++;
2907 data[i] = adapter->rx_stats_buffers[j].bytes;
2908 i++;
2909 data[i] = adapter->rx_stats_buffers[j].interrupts;
2910 i++;
2911 }
2912 }
2913
2914 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2915 {
2916 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2917
2918 return adapter->priv_flags;
2919 }
2920
2921 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2922 {
2923 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2924 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2925
2926 if (which_maxes)
2927 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2928 else
2929 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2930
2931 return 0;
2932 }
2933 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2934 .get_drvinfo = ibmvnic_get_drvinfo,
2935 .get_msglevel = ibmvnic_get_msglevel,
2936 .set_msglevel = ibmvnic_set_msglevel,
2937 .get_link = ibmvnic_get_link,
2938 .get_ringparam = ibmvnic_get_ringparam,
2939 .set_ringparam = ibmvnic_set_ringparam,
2940 .get_channels = ibmvnic_get_channels,
2941 .set_channels = ibmvnic_set_channels,
2942 .get_strings = ibmvnic_get_strings,
2943 .get_sset_count = ibmvnic_get_sset_count,
2944 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2945 .get_link_ksettings = ibmvnic_get_link_ksettings,
2946 .get_priv_flags = ibmvnic_get_priv_flags,
2947 .set_priv_flags = ibmvnic_set_priv_flags,
2948 };
2949
2950 /* Routines for managing CRQs/sCRQs */
2951
2952 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2953 struct ibmvnic_sub_crq_queue *scrq)
2954 {
2955 int rc;
2956
2957 if (scrq->irq) {
2958 free_irq(scrq->irq, scrq);
2959 irq_dispose_mapping(scrq->irq);
2960 scrq->irq = 0;
2961 }
2962
2963 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2964 atomic_set(&scrq->used, 0);
2965 scrq->cur = 0;
2966 scrq->ind_buf.index = 0;
2967
2968 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2969 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2970 return rc;
2971 }
2972
2973 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2974 {
2975 int i, rc;
2976
2977 if (!adapter->tx_scrq || !adapter->rx_scrq)
2978 return -EINVAL;
2979
2980 for (i = 0; i < adapter->req_tx_queues; i++) {
2981 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2982 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2983 if (rc)
2984 return rc;
2985 }
2986
2987 for (i = 0; i < adapter->req_rx_queues; i++) {
2988 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2989 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2990 if (rc)
2991 return rc;
2992 }
2993
2994 return rc;
2995 }
2996
2997 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2998 struct ibmvnic_sub_crq_queue *scrq,
2999 bool do_h_free)
3000 {
3001 struct device *dev = &adapter->vdev->dev;
3002 long rc;
3003
3004 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
3005
3006 if (do_h_free) {
3007 /* Close the sub-crqs */
3008 do {
3009 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3010 adapter->vdev->unit_address,
3011 scrq->crq_num);
3012 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3013
3014 if (rc) {
3015 netdev_err(adapter->netdev,
3016 "Failed to release sub-CRQ %16lx, rc = %ld\n",
3017 scrq->crq_num, rc);
3018 }
3019 }
3020
3021 dma_free_coherent(dev,
3022 IBMVNIC_IND_ARR_SZ,
3023 scrq->ind_buf.indir_arr,
3024 scrq->ind_buf.indir_dma);
3025
3026 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3027 DMA_BIDIRECTIONAL);
3028 free_pages((unsigned long)scrq->msgs, 2);
3029 kfree(scrq);
3030 }
3031
3032 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
3033 *adapter)
3034 {
3035 struct device *dev = &adapter->vdev->dev;
3036 struct ibmvnic_sub_crq_queue *scrq;
3037 int rc;
3038
3039 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
3040 if (!scrq)
3041 return NULL;
3042
3043 scrq->msgs =
3044 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
3045 if (!scrq->msgs) {
3046 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
3047 goto zero_page_failed;
3048 }
3049
3050 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
3051 DMA_BIDIRECTIONAL);
3052 if (dma_mapping_error(dev, scrq->msg_token)) {
3053 dev_warn(dev, "Couldn't map crq queue messages page\n");
3054 goto map_failed;
3055 }
3056
3057 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3058 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3059
3060 if (rc == H_RESOURCE)
3061 rc = ibmvnic_reset_crq(adapter);
3062
3063 if (rc == H_CLOSED) {
3064 dev_warn(dev, "Partner adapter not ready, waiting.\n");
3065 } else if (rc) {
3066 dev_warn(dev, "Error %d registering sub-crq\n", rc);
3067 goto reg_failed;
3068 }
3069
3070 scrq->adapter = adapter;
3071 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
3072 scrq->ind_buf.index = 0;
3073
3074 scrq->ind_buf.indir_arr =
3075 dma_alloc_coherent(dev,
3076 IBMVNIC_IND_ARR_SZ,
3077 &scrq->ind_buf.indir_dma,
3078 GFP_KERNEL);
3079
3080 if (!scrq->ind_buf.indir_arr)
3081 goto indir_failed;
3082
3083 spin_lock_init(&scrq->lock);
3084
3085 netdev_dbg(adapter->netdev,
3086 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
3087 scrq->crq_num, scrq->hw_irq, scrq->irq);
3088
3089 return scrq;
3090
3091 indir_failed:
3092 do {
3093 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3094 adapter->vdev->unit_address,
3095 scrq->crq_num);
3096 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc));
3097 reg_failed:
3098 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3099 DMA_BIDIRECTIONAL);
3100 map_failed:
3101 free_pages((unsigned long)scrq->msgs, 2);
3102 zero_page_failed:
3103 kfree(scrq);
3104
3105 return NULL;
3106 }
3107
3108 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
3109 {
3110 int i;
3111
3112 if (adapter->tx_scrq) {
3113 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
3114 if (!adapter->tx_scrq[i])
3115 continue;
3116
3117 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
3118 i);
3119 if (adapter->tx_scrq[i]->irq) {
3120 free_irq(adapter->tx_scrq[i]->irq,
3121 adapter->tx_scrq[i]);
3122 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
3123 adapter->tx_scrq[i]->irq = 0;
3124 }
3125
3126 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
3127 do_h_free);
3128 }
3129
3130 kfree(adapter->tx_scrq);
3131 adapter->tx_scrq = NULL;
3132 adapter->num_active_tx_scrqs = 0;
3133 }
3134
3135 if (adapter->rx_scrq) {
3136 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
3137 if (!adapter->rx_scrq[i])
3138 continue;
3139
3140 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
3141 i);
3142 if (adapter->rx_scrq[i]->irq) {
3143 free_irq(adapter->rx_scrq[i]->irq,
3144 adapter->rx_scrq[i]);
3145 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
3146 adapter->rx_scrq[i]->irq = 0;
3147 }
3148
3149 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
3150 do_h_free);
3151 }
3152
3153 kfree(adapter->rx_scrq);
3154 adapter->rx_scrq = NULL;
3155 adapter->num_active_rx_scrqs = 0;
3156 }
3157 }
3158
3159 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
3160 struct ibmvnic_sub_crq_queue *scrq)
3161 {
3162 struct device *dev = &adapter->vdev->dev;
3163 unsigned long rc;
3164
3165 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3166 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3167 if (rc)
3168 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3169 scrq->hw_irq, rc);
3170 return rc;
3171 }
3172
3173 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3174 struct ibmvnic_sub_crq_queue *scrq)
3175 {
3176 struct device *dev = &adapter->vdev->dev;
3177 unsigned long rc;
3178
3179 if (scrq->hw_irq > 0x100000000ULL) {
3180 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3181 return 1;
3182 }
3183
3184 if (test_bit(0, &adapter->resetting) &&
3185 adapter->reset_reason == VNIC_RESET_MOBILITY) {
3186 u64 val = (0xff000000) | scrq->hw_irq;
3187
3188 rc = plpar_hcall_norets(H_EOI, val);
3189 /* H_EOI would fail with rc = H_FUNCTION when running
3190 * in XIVE mode which is expected, but not an error.
3191 */
3192 if (rc && (rc != H_FUNCTION))
3193 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3194 val, rc);
3195 }
3196
3197 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3198 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3199 if (rc)
3200 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3201 scrq->hw_irq, rc);
3202 return rc;
3203 }
3204
3205 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3206 struct ibmvnic_sub_crq_queue *scrq)
3207 {
3208 struct device *dev = &adapter->vdev->dev;
3209 struct ibmvnic_tx_pool *tx_pool;
3210 struct ibmvnic_tx_buff *txbuff;
3211 struct netdev_queue *txq;
3212 union sub_crq *next;
3213 int index;
3214 int i;
3215
3216 restart_loop:
3217 while (pending_scrq(adapter, scrq)) {
3218 unsigned int pool = scrq->pool_index;
3219 int num_entries = 0;
3220 int total_bytes = 0;
3221 int num_packets = 0;
3222
3223 next = ibmvnic_next_scrq(adapter, scrq);
3224 for (i = 0; i < next->tx_comp.num_comps; i++) {
3225 if (next->tx_comp.rcs[i]) {
3226 dev_err(dev, "tx error %x\n",
3227 next->tx_comp.rcs[i]);
3228 continue;
3229 }
3230 index = be32_to_cpu(next->tx_comp.correlators[i]);
3231 if (index & IBMVNIC_TSO_POOL_MASK) {
3232 tx_pool = &adapter->tso_pool[pool];
3233 index &= ~IBMVNIC_TSO_POOL_MASK;
3234 } else {
3235 tx_pool = &adapter->tx_pool[pool];
3236 }
3237
3238 txbuff = &tx_pool->tx_buff[index];
3239 num_packets++;
3240 num_entries += txbuff->num_entries;
3241 if (txbuff->skb) {
3242 total_bytes += txbuff->skb->len;
3243 dev_consume_skb_irq(txbuff->skb);
3244 txbuff->skb = NULL;
3245 } else {
3246 netdev_warn(adapter->netdev,
3247 "TX completion received with NULL socket buffer\n");
3248 }
3249 tx_pool->free_map[tx_pool->producer_index] = index;
3250 tx_pool->producer_index =
3251 (tx_pool->producer_index + 1) %
3252 tx_pool->num_buffers;
3253 }
3254 /* remove tx_comp scrq*/
3255 next->tx_comp.first = 0;
3256
3257 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index);
3258 netdev_tx_completed_queue(txq, num_packets, total_bytes);
3259
3260 if (atomic_sub_return(num_entries, &scrq->used) <=
3261 (adapter->req_tx_entries_per_subcrq / 2) &&
3262 __netif_subqueue_stopped(adapter->netdev,
3263 scrq->pool_index)) {
3264 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3265 netdev_dbg(adapter->netdev, "Started queue %d\n",
3266 scrq->pool_index);
3267 }
3268 }
3269
3270 enable_scrq_irq(adapter, scrq);
3271
3272 if (pending_scrq(adapter, scrq)) {
3273 disable_scrq_irq(adapter, scrq);
3274 goto restart_loop;
3275 }
3276
3277 return 0;
3278 }
3279
3280 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3281 {
3282 struct ibmvnic_sub_crq_queue *scrq = instance;
3283 struct ibmvnic_adapter *adapter = scrq->adapter;
3284
3285 disable_scrq_irq(adapter, scrq);
3286 ibmvnic_complete_tx(adapter, scrq);
3287
3288 return IRQ_HANDLED;
3289 }
3290
3291 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3292 {
3293 struct ibmvnic_sub_crq_queue *scrq = instance;
3294 struct ibmvnic_adapter *adapter = scrq->adapter;
3295
3296 /* When booting a kdump kernel we can hit pending interrupts
3297 * prior to completing driver initialization.
3298 */
3299 if (unlikely(adapter->state != VNIC_OPEN))
3300 return IRQ_NONE;
3301
3302 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3303
3304 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3305 disable_scrq_irq(adapter, scrq);
3306 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3307 }
3308
3309 return IRQ_HANDLED;
3310 }
3311
3312 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3313 {
3314 struct device *dev = &adapter->vdev->dev;
3315 struct ibmvnic_sub_crq_queue *scrq;
3316 int i = 0, j = 0;
3317 int rc = 0;
3318
3319 for (i = 0; i < adapter->req_tx_queues; i++) {
3320 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3321 i);
3322 scrq = adapter->tx_scrq[i];
3323 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3324
3325 if (!scrq->irq) {
3326 rc = -EINVAL;
3327 dev_err(dev, "Error mapping irq\n");
3328 goto req_tx_irq_failed;
3329 }
3330
3331 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3332 adapter->vdev->unit_address, i);
3333 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3334 0, scrq->name, scrq);
3335
3336 if (rc) {
3337 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3338 scrq->irq, rc);
3339 irq_dispose_mapping(scrq->irq);
3340 goto req_tx_irq_failed;
3341 }
3342 }
3343
3344 for (i = 0; i < adapter->req_rx_queues; i++) {
3345 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3346 i);
3347 scrq = adapter->rx_scrq[i];
3348 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3349 if (!scrq->irq) {
3350 rc = -EINVAL;
3351 dev_err(dev, "Error mapping irq\n");
3352 goto req_rx_irq_failed;
3353 }
3354 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3355 adapter->vdev->unit_address, i);
3356 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3357 0, scrq->name, scrq);
3358 if (rc) {
3359 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3360 scrq->irq, rc);
3361 irq_dispose_mapping(scrq->irq);
3362 goto req_rx_irq_failed;
3363 }
3364 }
3365 return rc;
3366
3367 req_rx_irq_failed:
3368 for (j = 0; j < i; j++) {
3369 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3370 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3371 }
3372 i = adapter->req_tx_queues;
3373 req_tx_irq_failed:
3374 for (j = 0; j < i; j++) {
3375 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3376 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3377 }
3378 release_sub_crqs(adapter, 1);
3379 return rc;
3380 }
3381
3382 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3383 {
3384 struct device *dev = &adapter->vdev->dev;
3385 struct ibmvnic_sub_crq_queue **allqueues;
3386 int registered_queues = 0;
3387 int total_queues;
3388 int more = 0;
3389 int i;
3390
3391 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3392
3393 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3394 if (!allqueues)
3395 return -1;
3396
3397 for (i = 0; i < total_queues; i++) {
3398 allqueues[i] = init_sub_crq_queue(adapter);
3399 if (!allqueues[i]) {
3400 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3401 break;
3402 }
3403 registered_queues++;
3404 }
3405
3406 /* Make sure we were able to register the minimum number of queues */
3407 if (registered_queues <
3408 adapter->min_tx_queues + adapter->min_rx_queues) {
3409 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3410 goto tx_failed;
3411 }
3412
3413 /* Distribute the failed allocated queues*/
3414 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3415 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3416 switch (i % 3) {
3417 case 0:
3418 if (adapter->req_rx_queues > adapter->min_rx_queues)
3419 adapter->req_rx_queues--;
3420 else
3421 more++;
3422 break;
3423 case 1:
3424 if (adapter->req_tx_queues > adapter->min_tx_queues)
3425 adapter->req_tx_queues--;
3426 else
3427 more++;
3428 break;
3429 }
3430 }
3431
3432 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3433 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3434 if (!adapter->tx_scrq)
3435 goto tx_failed;
3436
3437 for (i = 0; i < adapter->req_tx_queues; i++) {
3438 adapter->tx_scrq[i] = allqueues[i];
3439 adapter->tx_scrq[i]->pool_index = i;
3440 adapter->num_active_tx_scrqs++;
3441 }
3442
3443 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3444 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3445 if (!adapter->rx_scrq)
3446 goto rx_failed;
3447
3448 for (i = 0; i < adapter->req_rx_queues; i++) {
3449 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3450 adapter->rx_scrq[i]->scrq_num = i;
3451 adapter->num_active_rx_scrqs++;
3452 }
3453
3454 kfree(allqueues);
3455 return 0;
3456
3457 rx_failed:
3458 kfree(adapter->tx_scrq);
3459 adapter->tx_scrq = NULL;
3460 tx_failed:
3461 for (i = 0; i < registered_queues; i++)
3462 release_sub_crq_queue(adapter, allqueues[i], 1);
3463 kfree(allqueues);
3464 return -1;
3465 }
3466
3467 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
3468 {
3469 struct device *dev = &adapter->vdev->dev;
3470 union ibmvnic_crq crq;
3471 int max_entries;
3472
3473 if (!retry) {
3474 /* Sub-CRQ entries are 32 byte long */
3475 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3476
3477 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3478 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3479 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3480 return;
3481 }
3482
3483 if (adapter->desired.mtu)
3484 adapter->req_mtu = adapter->desired.mtu;
3485 else
3486 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3487
3488 if (!adapter->desired.tx_entries)
3489 adapter->desired.tx_entries =
3490 adapter->max_tx_entries_per_subcrq;
3491 if (!adapter->desired.rx_entries)
3492 adapter->desired.rx_entries =
3493 adapter->max_rx_add_entries_per_subcrq;
3494
3495 max_entries = IBMVNIC_MAX_LTB_SIZE /
3496 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3497
3498 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3499 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3500 adapter->desired.tx_entries = max_entries;
3501 }
3502
3503 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3504 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3505 adapter->desired.rx_entries = max_entries;
3506 }
3507
3508 if (adapter->desired.tx_entries)
3509 adapter->req_tx_entries_per_subcrq =
3510 adapter->desired.tx_entries;
3511 else
3512 adapter->req_tx_entries_per_subcrq =
3513 adapter->max_tx_entries_per_subcrq;
3514
3515 if (adapter->desired.rx_entries)
3516 adapter->req_rx_add_entries_per_subcrq =
3517 adapter->desired.rx_entries;
3518 else
3519 adapter->req_rx_add_entries_per_subcrq =
3520 adapter->max_rx_add_entries_per_subcrq;
3521
3522 if (adapter->desired.tx_queues)
3523 adapter->req_tx_queues =
3524 adapter->desired.tx_queues;
3525 else
3526 adapter->req_tx_queues =
3527 adapter->opt_tx_comp_sub_queues;
3528
3529 if (adapter->desired.rx_queues)
3530 adapter->req_rx_queues =
3531 adapter->desired.rx_queues;
3532 else
3533 adapter->req_rx_queues =
3534 adapter->opt_rx_comp_queues;
3535
3536 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3537 }
3538
3539 memset(&crq, 0, sizeof(crq));
3540 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3541 crq.request_capability.cmd = REQUEST_CAPABILITY;
3542
3543 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3544 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3545 atomic_inc(&adapter->running_cap_crqs);
3546 ibmvnic_send_crq(adapter, &crq);
3547
3548 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3549 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3550 atomic_inc(&adapter->running_cap_crqs);
3551 ibmvnic_send_crq(adapter, &crq);
3552
3553 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3554 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3555 atomic_inc(&adapter->running_cap_crqs);
3556 ibmvnic_send_crq(adapter, &crq);
3557
3558 crq.request_capability.capability =
3559 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3560 crq.request_capability.number =
3561 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3562 atomic_inc(&adapter->running_cap_crqs);
3563 ibmvnic_send_crq(adapter, &crq);
3564
3565 crq.request_capability.capability =
3566 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3567 crq.request_capability.number =
3568 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3569 atomic_inc(&adapter->running_cap_crqs);
3570 ibmvnic_send_crq(adapter, &crq);
3571
3572 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3573 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3574 atomic_inc(&adapter->running_cap_crqs);
3575 ibmvnic_send_crq(adapter, &crq);
3576
3577 if (adapter->netdev->flags & IFF_PROMISC) {
3578 if (adapter->promisc_supported) {
3579 crq.request_capability.capability =
3580 cpu_to_be16(PROMISC_REQUESTED);
3581 crq.request_capability.number = cpu_to_be64(1);
3582 atomic_inc(&adapter->running_cap_crqs);
3583 ibmvnic_send_crq(adapter, &crq);
3584 }
3585 } else {
3586 crq.request_capability.capability =
3587 cpu_to_be16(PROMISC_REQUESTED);
3588 crq.request_capability.number = cpu_to_be64(0);
3589 atomic_inc(&adapter->running_cap_crqs);
3590 ibmvnic_send_crq(adapter, &crq);
3591 }
3592 }
3593
3594 static int pending_scrq(struct ibmvnic_adapter *adapter,
3595 struct ibmvnic_sub_crq_queue *scrq)
3596 {
3597 union sub_crq *entry = &scrq->msgs[scrq->cur];
3598
3599 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3600 return 1;
3601 else
3602 return 0;
3603 }
3604
3605 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3606 struct ibmvnic_sub_crq_queue *scrq)
3607 {
3608 union sub_crq *entry;
3609 unsigned long flags;
3610
3611 spin_lock_irqsave(&scrq->lock, flags);
3612 entry = &scrq->msgs[scrq->cur];
3613 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3614 if (++scrq->cur == scrq->size)
3615 scrq->cur = 0;
3616 } else {
3617 entry = NULL;
3618 }
3619 spin_unlock_irqrestore(&scrq->lock, flags);
3620
3621 return entry;
3622 }
3623
3624 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3625 {
3626 struct ibmvnic_crq_queue *queue = &adapter->crq;
3627 union ibmvnic_crq *crq;
3628
3629 crq = &queue->msgs[queue->cur];
3630 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3631 if (++queue->cur == queue->size)
3632 queue->cur = 0;
3633 } else {
3634 crq = NULL;
3635 }
3636
3637 return crq;
3638 }
3639
3640 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3641 {
3642 switch (rc) {
3643 case H_PARAMETER:
3644 dev_warn_ratelimited(dev,
3645 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3646 func, rc);
3647 break;
3648 case H_CLOSED:
3649 dev_warn_ratelimited(dev,
3650 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3651 func, rc);
3652 break;
3653 default:
3654 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3655 break;
3656 }
3657 }
3658
3659 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3660 u64 remote_handle, u64 ioba, u64 num_entries)
3661 {
3662 unsigned int ua = adapter->vdev->unit_address;
3663 struct device *dev = &adapter->vdev->dev;
3664 int rc;
3665
3666 /* Make sure the hypervisor sees the complete request */
3667 mb();
3668 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3669 cpu_to_be64(remote_handle),
3670 ioba, num_entries);
3671
3672 if (rc)
3673 print_subcrq_error(dev, rc, __func__);
3674
3675 return rc;
3676 }
3677
3678 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3679 union ibmvnic_crq *crq)
3680 {
3681 unsigned int ua = adapter->vdev->unit_address;
3682 struct device *dev = &adapter->vdev->dev;
3683 u64 *u64_crq = (u64 *)crq;
3684 int rc;
3685
3686 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3687 (unsigned long int)cpu_to_be64(u64_crq[0]),
3688 (unsigned long int)cpu_to_be64(u64_crq[1]));
3689
3690 if (!adapter->crq.active &&
3691 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3692 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3693 return -EINVAL;
3694 }
3695
3696 /* Make sure the hypervisor sees the complete request */
3697 mb();
3698
3699 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3700 cpu_to_be64(u64_crq[0]),
3701 cpu_to_be64(u64_crq[1]));
3702
3703 if (rc) {
3704 if (rc == H_CLOSED) {
3705 dev_warn(dev, "CRQ Queue closed\n");
3706 /* do not reset, report the fail, wait for passive init from server */
3707 }
3708
3709 dev_warn(dev, "Send error (rc=%d)\n", rc);
3710 }
3711
3712 return rc;
3713 }
3714
3715 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3716 {
3717 struct device *dev = &adapter->vdev->dev;
3718 union ibmvnic_crq crq;
3719 int retries = 100;
3720 int rc;
3721
3722 memset(&crq, 0, sizeof(crq));
3723 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3724 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3725 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3726
3727 do {
3728 rc = ibmvnic_send_crq(adapter, &crq);
3729 if (rc != H_CLOSED)
3730 break;
3731 retries--;
3732 msleep(50);
3733
3734 } while (retries > 0);
3735
3736 if (rc) {
3737 dev_err(dev, "Failed to send init request, rc = %d\n", rc);
3738 return rc;
3739 }
3740
3741 return 0;
3742 }
3743
3744 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3745 {
3746 union ibmvnic_crq crq;
3747
3748 memset(&crq, 0, sizeof(crq));
3749 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3750 crq.version_exchange.cmd = VERSION_EXCHANGE;
3751 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3752
3753 return ibmvnic_send_crq(adapter, &crq);
3754 }
3755
3756 struct vnic_login_client_data {
3757 u8 type;
3758 __be16 len;
3759 char name[];
3760 } __packed;
3761
3762 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3763 {
3764 int len;
3765
3766 /* Calculate the amount of buffer space needed for the
3767 * vnic client data in the login buffer. There are four entries,
3768 * OS name, LPAR name, device name, and a null last entry.
3769 */
3770 len = 4 * sizeof(struct vnic_login_client_data);
3771 len += 6; /* "Linux" plus NULL */
3772 len += strlen(utsname()->nodename) + 1;
3773 len += strlen(adapter->netdev->name) + 1;
3774
3775 return len;
3776 }
3777
3778 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3779 struct vnic_login_client_data *vlcd)
3780 {
3781 const char *os_name = "Linux";
3782 int len;
3783
3784 /* Type 1 - LPAR OS */
3785 vlcd->type = 1;
3786 len = strlen(os_name) + 1;
3787 vlcd->len = cpu_to_be16(len);
3788 strncpy(vlcd->name, os_name, len);
3789 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3790
3791 /* Type 2 - LPAR name */
3792 vlcd->type = 2;
3793 len = strlen(utsname()->nodename) + 1;
3794 vlcd->len = cpu_to_be16(len);
3795 strncpy(vlcd->name, utsname()->nodename, len);
3796 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3797
3798 /* Type 3 - device name */
3799 vlcd->type = 3;
3800 len = strlen(adapter->netdev->name) + 1;
3801 vlcd->len = cpu_to_be16(len);
3802 strncpy(vlcd->name, adapter->netdev->name, len);
3803 }
3804
3805 static int send_login(struct ibmvnic_adapter *adapter)
3806 {
3807 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3808 struct ibmvnic_login_buffer *login_buffer;
3809 struct device *dev = &adapter->vdev->dev;
3810 dma_addr_t rsp_buffer_token;
3811 dma_addr_t buffer_token;
3812 size_t rsp_buffer_size;
3813 union ibmvnic_crq crq;
3814 size_t buffer_size;
3815 __be64 *tx_list_p;
3816 __be64 *rx_list_p;
3817 int client_data_len;
3818 struct vnic_login_client_data *vlcd;
3819 int i;
3820
3821 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3822 netdev_err(adapter->netdev,
3823 "RX or TX queues are not allocated, device login failed\n");
3824 return -1;
3825 }
3826
3827 release_login_rsp_buffer(adapter);
3828 client_data_len = vnic_client_data_len(adapter);
3829
3830 buffer_size =
3831 sizeof(struct ibmvnic_login_buffer) +
3832 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3833 client_data_len;
3834
3835 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3836 if (!login_buffer)
3837 goto buf_alloc_failed;
3838
3839 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3840 DMA_TO_DEVICE);
3841 if (dma_mapping_error(dev, buffer_token)) {
3842 dev_err(dev, "Couldn't map login buffer\n");
3843 goto buf_map_failed;
3844 }
3845
3846 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3847 sizeof(u64) * adapter->req_tx_queues +
3848 sizeof(u64) * adapter->req_rx_queues +
3849 sizeof(u64) * adapter->req_rx_queues +
3850 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3851
3852 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3853 if (!login_rsp_buffer)
3854 goto buf_rsp_alloc_failed;
3855
3856 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3857 rsp_buffer_size, DMA_FROM_DEVICE);
3858 if (dma_mapping_error(dev, rsp_buffer_token)) {
3859 dev_err(dev, "Couldn't map login rsp buffer\n");
3860 goto buf_rsp_map_failed;
3861 }
3862
3863 adapter->login_buf = login_buffer;
3864 adapter->login_buf_token = buffer_token;
3865 adapter->login_buf_sz = buffer_size;
3866 adapter->login_rsp_buf = login_rsp_buffer;
3867 adapter->login_rsp_buf_token = rsp_buffer_token;
3868 adapter->login_rsp_buf_sz = rsp_buffer_size;
3869
3870 login_buffer->len = cpu_to_be32(buffer_size);
3871 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3872 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3873 login_buffer->off_txcomp_subcrqs =
3874 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3875 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3876 login_buffer->off_rxcomp_subcrqs =
3877 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3878 sizeof(u64) * adapter->req_tx_queues);
3879 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3880 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3881
3882 tx_list_p = (__be64 *)((char *)login_buffer +
3883 sizeof(struct ibmvnic_login_buffer));
3884 rx_list_p = (__be64 *)((char *)login_buffer +
3885 sizeof(struct ibmvnic_login_buffer) +
3886 sizeof(u64) * adapter->req_tx_queues);
3887
3888 for (i = 0; i < adapter->req_tx_queues; i++) {
3889 if (adapter->tx_scrq[i]) {
3890 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3891 crq_num);
3892 }
3893 }
3894
3895 for (i = 0; i < adapter->req_rx_queues; i++) {
3896 if (adapter->rx_scrq[i]) {
3897 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3898 crq_num);
3899 }
3900 }
3901
3902 /* Insert vNIC login client data */
3903 vlcd = (struct vnic_login_client_data *)
3904 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3905 login_buffer->client_data_offset =
3906 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3907 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3908
3909 vnic_add_client_data(adapter, vlcd);
3910
3911 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3912 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3913 netdev_dbg(adapter->netdev, "%016lx\n",
3914 ((unsigned long int *)(adapter->login_buf))[i]);
3915 }
3916
3917 memset(&crq, 0, sizeof(crq));
3918 crq.login.first = IBMVNIC_CRQ_CMD;
3919 crq.login.cmd = LOGIN;
3920 crq.login.ioba = cpu_to_be32(buffer_token);
3921 crq.login.len = cpu_to_be32(buffer_size);
3922 ibmvnic_send_crq(adapter, &crq);
3923
3924 return 0;
3925
3926 buf_rsp_map_failed:
3927 kfree(login_rsp_buffer);
3928 buf_rsp_alloc_failed:
3929 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3930 buf_map_failed:
3931 kfree(login_buffer);
3932 buf_alloc_failed:
3933 return -1;
3934 }
3935
3936 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3937 u32 len, u8 map_id)
3938 {
3939 union ibmvnic_crq crq;
3940
3941 memset(&crq, 0, sizeof(crq));
3942 crq.request_map.first = IBMVNIC_CRQ_CMD;
3943 crq.request_map.cmd = REQUEST_MAP;
3944 crq.request_map.map_id = map_id;
3945 crq.request_map.ioba = cpu_to_be32(addr);
3946 crq.request_map.len = cpu_to_be32(len);
3947 return ibmvnic_send_crq(adapter, &crq);
3948 }
3949
3950 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3951 {
3952 union ibmvnic_crq crq;
3953
3954 memset(&crq, 0, sizeof(crq));
3955 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3956 crq.request_unmap.cmd = REQUEST_UNMAP;
3957 crq.request_unmap.map_id = map_id;
3958 return ibmvnic_send_crq(adapter, &crq);
3959 }
3960
3961 static void send_query_map(struct ibmvnic_adapter *adapter)
3962 {
3963 union ibmvnic_crq crq;
3964
3965 memset(&crq, 0, sizeof(crq));
3966 crq.query_map.first = IBMVNIC_CRQ_CMD;
3967 crq.query_map.cmd = QUERY_MAP;
3968 ibmvnic_send_crq(adapter, &crq);
3969 }
3970
3971 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3972 static void send_query_cap(struct ibmvnic_adapter *adapter)
3973 {
3974 union ibmvnic_crq crq;
3975
3976 atomic_set(&adapter->running_cap_crqs, 0);
3977 memset(&crq, 0, sizeof(crq));
3978 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3979 crq.query_capability.cmd = QUERY_CAPABILITY;
3980
3981 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3982 atomic_inc(&adapter->running_cap_crqs);
3983 ibmvnic_send_crq(adapter, &crq);
3984
3985 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3986 atomic_inc(&adapter->running_cap_crqs);
3987 ibmvnic_send_crq(adapter, &crq);
3988
3989 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3990 atomic_inc(&adapter->running_cap_crqs);
3991 ibmvnic_send_crq(adapter, &crq);
3992
3993 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3994 atomic_inc(&adapter->running_cap_crqs);
3995 ibmvnic_send_crq(adapter, &crq);
3996
3997 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3998 atomic_inc(&adapter->running_cap_crqs);
3999 ibmvnic_send_crq(adapter, &crq);
4000
4001 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
4002 atomic_inc(&adapter->running_cap_crqs);
4003 ibmvnic_send_crq(adapter, &crq);
4004
4005 crq.query_capability.capability =
4006 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
4007 atomic_inc(&adapter->running_cap_crqs);
4008 ibmvnic_send_crq(adapter, &crq);
4009
4010 crq.query_capability.capability =
4011 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
4012 atomic_inc(&adapter->running_cap_crqs);
4013 ibmvnic_send_crq(adapter, &crq);
4014
4015 crq.query_capability.capability =
4016 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
4017 atomic_inc(&adapter->running_cap_crqs);
4018 ibmvnic_send_crq(adapter, &crq);
4019
4020 crq.query_capability.capability =
4021 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
4022 atomic_inc(&adapter->running_cap_crqs);
4023 ibmvnic_send_crq(adapter, &crq);
4024
4025 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
4026 atomic_inc(&adapter->running_cap_crqs);
4027 ibmvnic_send_crq(adapter, &crq);
4028
4029 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
4030 atomic_inc(&adapter->running_cap_crqs);
4031 ibmvnic_send_crq(adapter, &crq);
4032
4033 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
4034 atomic_inc(&adapter->running_cap_crqs);
4035 ibmvnic_send_crq(adapter, &crq);
4036
4037 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
4038 atomic_inc(&adapter->running_cap_crqs);
4039 ibmvnic_send_crq(adapter, &crq);
4040
4041 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
4042 atomic_inc(&adapter->running_cap_crqs);
4043 ibmvnic_send_crq(adapter, &crq);
4044
4045 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
4046 atomic_inc(&adapter->running_cap_crqs);
4047 ibmvnic_send_crq(adapter, &crq);
4048
4049 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
4050 atomic_inc(&adapter->running_cap_crqs);
4051 ibmvnic_send_crq(adapter, &crq);
4052
4053 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
4054 atomic_inc(&adapter->running_cap_crqs);
4055 ibmvnic_send_crq(adapter, &crq);
4056
4057 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
4058 atomic_inc(&adapter->running_cap_crqs);
4059 ibmvnic_send_crq(adapter, &crq);
4060
4061 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
4062 atomic_inc(&adapter->running_cap_crqs);
4063 ibmvnic_send_crq(adapter, &crq);
4064
4065 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
4066 atomic_inc(&adapter->running_cap_crqs);
4067 ibmvnic_send_crq(adapter, &crq);
4068
4069 crq.query_capability.capability =
4070 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
4071 atomic_inc(&adapter->running_cap_crqs);
4072 ibmvnic_send_crq(adapter, &crq);
4073
4074 crq.query_capability.capability =
4075 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
4076 atomic_inc(&adapter->running_cap_crqs);
4077 ibmvnic_send_crq(adapter, &crq);
4078
4079 crq.query_capability.capability =
4080 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
4081 atomic_inc(&adapter->running_cap_crqs);
4082 ibmvnic_send_crq(adapter, &crq);
4083
4084 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
4085 atomic_inc(&adapter->running_cap_crqs);
4086 ibmvnic_send_crq(adapter, &crq);
4087 }
4088
4089 static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
4090 {
4091 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4092 struct device *dev = &adapter->vdev->dev;
4093 union ibmvnic_crq crq;
4094
4095 adapter->ip_offload_tok =
4096 dma_map_single(dev,
4097 &adapter->ip_offload_buf,
4098 buf_sz,
4099 DMA_FROM_DEVICE);
4100
4101 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4102 if (!firmware_has_feature(FW_FEATURE_CMO))
4103 dev_err(dev, "Couldn't map offload buffer\n");
4104 return;
4105 }
4106
4107 memset(&crq, 0, sizeof(crq));
4108 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4109 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4110 crq.query_ip_offload.len = cpu_to_be32(buf_sz);
4111 crq.query_ip_offload.ioba =
4112 cpu_to_be32(adapter->ip_offload_tok);
4113
4114 ibmvnic_send_crq(adapter, &crq);
4115 }
4116
4117 static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
4118 {
4119 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
4120 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4121 struct device *dev = &adapter->vdev->dev;
4122 netdev_features_t old_hw_features = 0;
4123 union ibmvnic_crq crq;
4124
4125 adapter->ip_offload_ctrl_tok =
4126 dma_map_single(dev,
4127 ctrl_buf,
4128 sizeof(adapter->ip_offload_ctrl),
4129 DMA_TO_DEVICE);
4130
4131 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4132 dev_err(dev, "Couldn't map ip offload control buffer\n");
4133 return;
4134 }
4135
4136 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4137 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
4138 ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
4139 ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
4140 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4141 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
4142 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4143 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
4144 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
4145 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
4146
4147 /* large_rx disabled for now, additional features needed */
4148 ctrl_buf->large_rx_ipv4 = 0;
4149 ctrl_buf->large_rx_ipv6 = 0;
4150
4151 if (adapter->state != VNIC_PROBING) {
4152 old_hw_features = adapter->netdev->hw_features;
4153 adapter->netdev->hw_features = 0;
4154 }
4155
4156 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4157
4158 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4159 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4160
4161 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4162 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4163
4164 if ((adapter->netdev->features &
4165 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4166 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4167
4168 if (buf->large_tx_ipv4)
4169 adapter->netdev->hw_features |= NETIF_F_TSO;
4170 if (buf->large_tx_ipv6)
4171 adapter->netdev->hw_features |= NETIF_F_TSO6;
4172
4173 if (adapter->state == VNIC_PROBING) {
4174 adapter->netdev->features |= adapter->netdev->hw_features;
4175 } else if (old_hw_features != adapter->netdev->hw_features) {
4176 netdev_features_t tmp = 0;
4177
4178 /* disable features no longer supported */
4179 adapter->netdev->features &= adapter->netdev->hw_features;
4180 /* turn on features now supported if previously enabled */
4181 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4182 adapter->netdev->hw_features;
4183 adapter->netdev->features |=
4184 tmp & adapter->netdev->wanted_features;
4185 }
4186
4187 memset(&crq, 0, sizeof(crq));
4188 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4189 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4190 crq.control_ip_offload.len =
4191 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4192 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4193 ibmvnic_send_crq(adapter, &crq);
4194 }
4195
4196 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
4197 struct ibmvnic_adapter *adapter)
4198 {
4199 struct device *dev = &adapter->vdev->dev;
4200
4201 if (crq->get_vpd_size_rsp.rc.code) {
4202 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
4203 crq->get_vpd_size_rsp.rc.code);
4204 complete(&adapter->fw_done);
4205 return;
4206 }
4207
4208 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
4209 complete(&adapter->fw_done);
4210 }
4211
4212 static void handle_vpd_rsp(union ibmvnic_crq *crq,
4213 struct ibmvnic_adapter *adapter)
4214 {
4215 struct device *dev = &adapter->vdev->dev;
4216 unsigned char *substr = NULL;
4217 u8 fw_level_len = 0;
4218
4219 memset(adapter->fw_version, 0, 32);
4220
4221 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
4222 DMA_FROM_DEVICE);
4223
4224 if (crq->get_vpd_rsp.rc.code) {
4225 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
4226 crq->get_vpd_rsp.rc.code);
4227 goto complete;
4228 }
4229
4230 /* get the position of the firmware version info
4231 * located after the ASCII 'RM' substring in the buffer
4232 */
4233 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
4234 if (!substr) {
4235 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4236 goto complete;
4237 }
4238
4239 /* get length of firmware level ASCII substring */
4240 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
4241 fw_level_len = *(substr + 2);
4242 } else {
4243 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
4244 goto complete;
4245 }
4246
4247 /* copy firmware version string from vpd into adapter */
4248 if ((substr + 3 + fw_level_len) <
4249 (adapter->vpd->buff + adapter->vpd->len)) {
4250 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4251 } else {
4252 dev_info(dev, "FW substr extrapolated VPD buff\n");
4253 }
4254
4255 complete:
4256 if (adapter->fw_version[0] == '\0')
4257 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4258 complete(&adapter->fw_done);
4259 }
4260
4261 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4262 {
4263 struct device *dev = &adapter->vdev->dev;
4264 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4265 int i;
4266
4267 dma_unmap_single(dev, adapter->ip_offload_tok,
4268 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4269
4270 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4271 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4272 netdev_dbg(adapter->netdev, "%016lx\n",
4273 ((unsigned long int *)(buf))[i]);
4274
4275 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4276 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4277 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4278 buf->tcp_ipv4_chksum);
4279 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4280 buf->tcp_ipv6_chksum);
4281 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4282 buf->udp_ipv4_chksum);
4283 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4284 buf->udp_ipv6_chksum);
4285 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4286 buf->large_tx_ipv4);
4287 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4288 buf->large_tx_ipv6);
4289 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4290 buf->large_rx_ipv4);
4291 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4292 buf->large_rx_ipv6);
4293 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4294 buf->max_ipv4_header_size);
4295 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4296 buf->max_ipv6_header_size);
4297 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4298 buf->max_tcp_header_size);
4299 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4300 buf->max_udp_header_size);
4301 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4302 buf->max_large_tx_size);
4303 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4304 buf->max_large_rx_size);
4305 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4306 buf->ipv6_extension_header);
4307 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4308 buf->tcp_pseudosum_req);
4309 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4310 buf->num_ipv6_ext_headers);
4311 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4312 buf->off_ipv6_ext_headers);
4313
4314 send_control_ip_offload(adapter);
4315 }
4316
4317 static const char *ibmvnic_fw_err_cause(u16 cause)
4318 {
4319 switch (cause) {
4320 case ADAPTER_PROBLEM:
4321 return "adapter problem";
4322 case BUS_PROBLEM:
4323 return "bus problem";
4324 case FW_PROBLEM:
4325 return "firmware problem";
4326 case DD_PROBLEM:
4327 return "device driver problem";
4328 case EEH_RECOVERY:
4329 return "EEH recovery";
4330 case FW_UPDATED:
4331 return "firmware updated";
4332 case LOW_MEMORY:
4333 return "low Memory";
4334 default:
4335 return "unknown";
4336 }
4337 }
4338
4339 static void handle_error_indication(union ibmvnic_crq *crq,
4340 struct ibmvnic_adapter *adapter)
4341 {
4342 struct device *dev = &adapter->vdev->dev;
4343 u16 cause;
4344
4345 cause = be16_to_cpu(crq->error_indication.error_cause);
4346
4347 dev_warn_ratelimited(dev,
4348 "Firmware reports %serror, cause: %s. Starting recovery...\n",
4349 crq->error_indication.flags
4350 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4351 ibmvnic_fw_err_cause(cause));
4352
4353 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4354 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4355 else
4356 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4357 }
4358
4359 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4360 struct ibmvnic_adapter *adapter)
4361 {
4362 struct net_device *netdev = adapter->netdev;
4363 struct device *dev = &adapter->vdev->dev;
4364 long rc;
4365
4366 rc = crq->change_mac_addr_rsp.rc.code;
4367 if (rc) {
4368 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4369 goto out;
4370 }
4371 /* crq->change_mac_addr.mac_addr is the requested one
4372 * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
4373 */
4374 ether_addr_copy(netdev->dev_addr,
4375 &crq->change_mac_addr_rsp.mac_addr[0]);
4376 ether_addr_copy(adapter->mac_addr,
4377 &crq->change_mac_addr_rsp.mac_addr[0]);
4378 out:
4379 complete(&adapter->fw_done);
4380 return rc;
4381 }
4382
4383 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4384 struct ibmvnic_adapter *adapter)
4385 {
4386 struct device *dev = &adapter->vdev->dev;
4387 u64 *req_value;
4388 char *name;
4389
4390 atomic_dec(&adapter->running_cap_crqs);
4391 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4392 case REQ_TX_QUEUES:
4393 req_value = &adapter->req_tx_queues;
4394 name = "tx";
4395 break;
4396 case REQ_RX_QUEUES:
4397 req_value = &adapter->req_rx_queues;
4398 name = "rx";
4399 break;
4400 case REQ_RX_ADD_QUEUES:
4401 req_value = &adapter->req_rx_add_queues;
4402 name = "rx_add";
4403 break;
4404 case REQ_TX_ENTRIES_PER_SUBCRQ:
4405 req_value = &adapter->req_tx_entries_per_subcrq;
4406 name = "tx_entries_per_subcrq";
4407 break;
4408 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4409 req_value = &adapter->req_rx_add_entries_per_subcrq;
4410 name = "rx_add_entries_per_subcrq";
4411 break;
4412 case REQ_MTU:
4413 req_value = &adapter->req_mtu;
4414 name = "mtu";
4415 break;
4416 case PROMISC_REQUESTED:
4417 req_value = &adapter->promisc;
4418 name = "promisc";
4419 break;
4420 default:
4421 dev_err(dev, "Got invalid cap request rsp %d\n",
4422 crq->request_capability.capability);
4423 return;
4424 }
4425
4426 switch (crq->request_capability_rsp.rc.code) {
4427 case SUCCESS:
4428 break;
4429 case PARTIALSUCCESS:
4430 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4431 *req_value,
4432 (long int)be64_to_cpu(crq->request_capability_rsp.
4433 number), name);
4434
4435 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4436 REQ_MTU) {
4437 pr_err("mtu of %llu is not supported. Reverting.\n",
4438 *req_value);
4439 *req_value = adapter->fallback.mtu;
4440 } else {
4441 *req_value =
4442 be64_to_cpu(crq->request_capability_rsp.number);
4443 }
4444
4445 send_request_cap(adapter, 1);
4446 return;
4447 default:
4448 dev_err(dev, "Error %d in request cap rsp\n",
4449 crq->request_capability_rsp.rc.code);
4450 return;
4451 }
4452
4453 /* Done receiving requested capabilities, query IP offload support */
4454 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4455 adapter->wait_capability = false;
4456 send_query_ip_offload(adapter);
4457 }
4458 }
4459
4460 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4461 struct ibmvnic_adapter *adapter)
4462 {
4463 struct device *dev = &adapter->vdev->dev;
4464 struct net_device *netdev = adapter->netdev;
4465 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4466 struct ibmvnic_login_buffer *login = adapter->login_buf;
4467 u64 *tx_handle_array;
4468 u64 *rx_handle_array;
4469 int num_tx_pools;
4470 int num_rx_pools;
4471 u64 *size_array;
4472 int i;
4473
4474 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4475 DMA_TO_DEVICE);
4476 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4477 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4478
4479 /* If the number of queues requested can't be allocated by the
4480 * server, the login response will return with code 1. We will need
4481 * to resend the login buffer with fewer queues requested.
4482 */
4483 if (login_rsp_crq->generic.rc.code) {
4484 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4485 complete(&adapter->init_done);
4486 return 0;
4487 }
4488
4489 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4490
4491 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4492 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4493 netdev_dbg(adapter->netdev, "%016lx\n",
4494 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4495 }
4496
4497 /* Sanity checks */
4498 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4499 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4500 adapter->req_rx_add_queues !=
4501 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4502 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4503 ibmvnic_remove(adapter->vdev);
4504 return -EIO;
4505 }
4506 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4507 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
4508 /* variable buffer sizes are not supported, so just read the
4509 * first entry.
4510 */
4511 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
4512
4513 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
4514 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4515
4516 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4517 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
4518 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4519 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
4520
4521 for (i = 0; i < num_tx_pools; i++)
4522 adapter->tx_scrq[i]->handle = tx_handle_array[i];
4523
4524 for (i = 0; i < num_rx_pools; i++)
4525 adapter->rx_scrq[i]->handle = rx_handle_array[i];
4526
4527 adapter->num_active_tx_scrqs = num_tx_pools;
4528 adapter->num_active_rx_scrqs = num_rx_pools;
4529 release_login_rsp_buffer(adapter);
4530 release_login_buffer(adapter);
4531 complete(&adapter->init_done);
4532
4533 return 0;
4534 }
4535
4536 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4537 struct ibmvnic_adapter *adapter)
4538 {
4539 struct device *dev = &adapter->vdev->dev;
4540 long rc;
4541
4542 rc = crq->request_unmap_rsp.rc.code;
4543 if (rc)
4544 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4545 }
4546
4547 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4548 struct ibmvnic_adapter *adapter)
4549 {
4550 struct net_device *netdev = adapter->netdev;
4551 struct device *dev = &adapter->vdev->dev;
4552 long rc;
4553
4554 rc = crq->query_map_rsp.rc.code;
4555 if (rc) {
4556 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4557 return;
4558 }
4559 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4560 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4561 crq->query_map_rsp.free_pages);
4562 }
4563
4564 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4565 struct ibmvnic_adapter *adapter)
4566 {
4567 struct net_device *netdev = adapter->netdev;
4568 struct device *dev = &adapter->vdev->dev;
4569 long rc;
4570
4571 atomic_dec(&adapter->running_cap_crqs);
4572 netdev_dbg(netdev, "Outstanding queries: %d\n",
4573 atomic_read(&adapter->running_cap_crqs));
4574 rc = crq->query_capability.rc.code;
4575 if (rc) {
4576 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4577 goto out;
4578 }
4579
4580 switch (be16_to_cpu(crq->query_capability.capability)) {
4581 case MIN_TX_QUEUES:
4582 adapter->min_tx_queues =
4583 be64_to_cpu(crq->query_capability.number);
4584 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4585 adapter->min_tx_queues);
4586 break;
4587 case MIN_RX_QUEUES:
4588 adapter->min_rx_queues =
4589 be64_to_cpu(crq->query_capability.number);
4590 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4591 adapter->min_rx_queues);
4592 break;
4593 case MIN_RX_ADD_QUEUES:
4594 adapter->min_rx_add_queues =
4595 be64_to_cpu(crq->query_capability.number);
4596 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4597 adapter->min_rx_add_queues);
4598 break;
4599 case MAX_TX_QUEUES:
4600 adapter->max_tx_queues =
4601 be64_to_cpu(crq->query_capability.number);
4602 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4603 adapter->max_tx_queues);
4604 break;
4605 case MAX_RX_QUEUES:
4606 adapter->max_rx_queues =
4607 be64_to_cpu(crq->query_capability.number);
4608 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4609 adapter->max_rx_queues);
4610 break;
4611 case MAX_RX_ADD_QUEUES:
4612 adapter->max_rx_add_queues =
4613 be64_to_cpu(crq->query_capability.number);
4614 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4615 adapter->max_rx_add_queues);
4616 break;
4617 case MIN_TX_ENTRIES_PER_SUBCRQ:
4618 adapter->min_tx_entries_per_subcrq =
4619 be64_to_cpu(crq->query_capability.number);
4620 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4621 adapter->min_tx_entries_per_subcrq);
4622 break;
4623 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4624 adapter->min_rx_add_entries_per_subcrq =
4625 be64_to_cpu(crq->query_capability.number);
4626 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4627 adapter->min_rx_add_entries_per_subcrq);
4628 break;
4629 case MAX_TX_ENTRIES_PER_SUBCRQ:
4630 adapter->max_tx_entries_per_subcrq =
4631 be64_to_cpu(crq->query_capability.number);
4632 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4633 adapter->max_tx_entries_per_subcrq);
4634 break;
4635 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4636 adapter->max_rx_add_entries_per_subcrq =
4637 be64_to_cpu(crq->query_capability.number);
4638 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4639 adapter->max_rx_add_entries_per_subcrq);
4640 break;
4641 case TCP_IP_OFFLOAD:
4642 adapter->tcp_ip_offload =
4643 be64_to_cpu(crq->query_capability.number);
4644 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4645 adapter->tcp_ip_offload);
4646 break;
4647 case PROMISC_SUPPORTED:
4648 adapter->promisc_supported =
4649 be64_to_cpu(crq->query_capability.number);
4650 netdev_dbg(netdev, "promisc_supported = %lld\n",
4651 adapter->promisc_supported);
4652 break;
4653 case MIN_MTU:
4654 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4655 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4656 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4657 break;
4658 case MAX_MTU:
4659 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4660 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4661 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4662 break;
4663 case MAX_MULTICAST_FILTERS:
4664 adapter->max_multicast_filters =
4665 be64_to_cpu(crq->query_capability.number);
4666 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4667 adapter->max_multicast_filters);
4668 break;
4669 case VLAN_HEADER_INSERTION:
4670 adapter->vlan_header_insertion =
4671 be64_to_cpu(crq->query_capability.number);
4672 if (adapter->vlan_header_insertion)
4673 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4674 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4675 adapter->vlan_header_insertion);
4676 break;
4677 case RX_VLAN_HEADER_INSERTION:
4678 adapter->rx_vlan_header_insertion =
4679 be64_to_cpu(crq->query_capability.number);
4680 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4681 adapter->rx_vlan_header_insertion);
4682 break;
4683 case MAX_TX_SG_ENTRIES:
4684 adapter->max_tx_sg_entries =
4685 be64_to_cpu(crq->query_capability.number);
4686 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4687 adapter->max_tx_sg_entries);
4688 break;
4689 case RX_SG_SUPPORTED:
4690 adapter->rx_sg_supported =
4691 be64_to_cpu(crq->query_capability.number);
4692 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4693 adapter->rx_sg_supported);
4694 break;
4695 case OPT_TX_COMP_SUB_QUEUES:
4696 adapter->opt_tx_comp_sub_queues =
4697 be64_to_cpu(crq->query_capability.number);
4698 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4699 adapter->opt_tx_comp_sub_queues);
4700 break;
4701 case OPT_RX_COMP_QUEUES:
4702 adapter->opt_rx_comp_queues =
4703 be64_to_cpu(crq->query_capability.number);
4704 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4705 adapter->opt_rx_comp_queues);
4706 break;
4707 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4708 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4709 be64_to_cpu(crq->query_capability.number);
4710 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4711 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4712 break;
4713 case OPT_TX_ENTRIES_PER_SUBCRQ:
4714 adapter->opt_tx_entries_per_subcrq =
4715 be64_to_cpu(crq->query_capability.number);
4716 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4717 adapter->opt_tx_entries_per_subcrq);
4718 break;
4719 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4720 adapter->opt_rxba_entries_per_subcrq =
4721 be64_to_cpu(crq->query_capability.number);
4722 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4723 adapter->opt_rxba_entries_per_subcrq);
4724 break;
4725 case TX_RX_DESC_REQ:
4726 adapter->tx_rx_desc_req = crq->query_capability.number;
4727 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4728 adapter->tx_rx_desc_req);
4729 break;
4730
4731 default:
4732 netdev_err(netdev, "Got invalid cap rsp %d\n",
4733 crq->query_capability.capability);
4734 }
4735
4736 out:
4737 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4738 adapter->wait_capability = false;
4739 send_request_cap(adapter, 0);
4740 }
4741 }
4742
4743 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4744 {
4745 union ibmvnic_crq crq;
4746 int rc;
4747
4748 memset(&crq, 0, sizeof(crq));
4749 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4750 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4751
4752 mutex_lock(&adapter->fw_lock);
4753 adapter->fw_done_rc = 0;
4754 reinit_completion(&adapter->fw_done);
4755
4756 rc = ibmvnic_send_crq(adapter, &crq);
4757 if (rc) {
4758 mutex_unlock(&adapter->fw_lock);
4759 return rc;
4760 }
4761
4762 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4763 if (rc) {
4764 mutex_unlock(&adapter->fw_lock);
4765 return rc;
4766 }
4767
4768 mutex_unlock(&adapter->fw_lock);
4769 return adapter->fw_done_rc ? -EIO : 0;
4770 }
4771
4772 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4773 struct ibmvnic_adapter *adapter)
4774 {
4775 struct net_device *netdev = adapter->netdev;
4776 int rc;
4777 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4778
4779 rc = crq->query_phys_parms_rsp.rc.code;
4780 if (rc) {
4781 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4782 return rc;
4783 }
4784 switch (rspeed) {
4785 case IBMVNIC_10MBPS:
4786 adapter->speed = SPEED_10;
4787 break;
4788 case IBMVNIC_100MBPS:
4789 adapter->speed = SPEED_100;
4790 break;
4791 case IBMVNIC_1GBPS:
4792 adapter->speed = SPEED_1000;
4793 break;
4794 case IBMVNIC_10GBPS:
4795 adapter->speed = SPEED_10000;
4796 break;
4797 case IBMVNIC_25GBPS:
4798 adapter->speed = SPEED_25000;
4799 break;
4800 case IBMVNIC_40GBPS:
4801 adapter->speed = SPEED_40000;
4802 break;
4803 case IBMVNIC_50GBPS:
4804 adapter->speed = SPEED_50000;
4805 break;
4806 case IBMVNIC_100GBPS:
4807 adapter->speed = SPEED_100000;
4808 break;
4809 case IBMVNIC_200GBPS:
4810 adapter->speed = SPEED_200000;
4811 break;
4812 default:
4813 if (netif_carrier_ok(netdev))
4814 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4815 adapter->speed = SPEED_UNKNOWN;
4816 }
4817 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4818 adapter->duplex = DUPLEX_FULL;
4819 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4820 adapter->duplex = DUPLEX_HALF;
4821 else
4822 adapter->duplex = DUPLEX_UNKNOWN;
4823
4824 return rc;
4825 }
4826
4827 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4828 struct ibmvnic_adapter *adapter)
4829 {
4830 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4831 struct net_device *netdev = adapter->netdev;
4832 struct device *dev = &adapter->vdev->dev;
4833 u64 *u64_crq = (u64 *)crq;
4834 long rc;
4835
4836 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4837 (unsigned long int)cpu_to_be64(u64_crq[0]),
4838 (unsigned long int)cpu_to_be64(u64_crq[1]));
4839 switch (gen_crq->first) {
4840 case IBMVNIC_CRQ_INIT_RSP:
4841 switch (gen_crq->cmd) {
4842 case IBMVNIC_CRQ_INIT:
4843 dev_info(dev, "Partner initialized\n");
4844 adapter->from_passive_init = true;
4845 if (!completion_done(&adapter->init_done)) {
4846 complete(&adapter->init_done);
4847 adapter->init_done_rc = -EIO;
4848 }
4849 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4850 break;
4851 case IBMVNIC_CRQ_INIT_COMPLETE:
4852 dev_info(dev, "Partner initialization complete\n");
4853 adapter->crq.active = true;
4854 send_version_xchg(adapter);
4855 break;
4856 default:
4857 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4858 }
4859 return;
4860 case IBMVNIC_CRQ_XPORT_EVENT:
4861 netif_carrier_off(netdev);
4862 adapter->crq.active = false;
4863 /* terminate any thread waiting for a response
4864 * from the device
4865 */
4866 if (!completion_done(&adapter->fw_done)) {
4867 adapter->fw_done_rc = -EIO;
4868 complete(&adapter->fw_done);
4869 }
4870 if (!completion_done(&adapter->stats_done))
4871 complete(&adapter->stats_done);
4872 if (test_bit(0, &adapter->resetting))
4873 adapter->force_reset_recovery = true;
4874 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4875 dev_info(dev, "Migrated, re-enabling adapter\n");
4876 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4877 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4878 dev_info(dev, "Backing device failover detected\n");
4879 adapter->failover_pending = true;
4880 } else {
4881 /* The adapter lost the connection */
4882 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4883 gen_crq->cmd);
4884 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4885 }
4886 return;
4887 case IBMVNIC_CRQ_CMD_RSP:
4888 break;
4889 default:
4890 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4891 gen_crq->first);
4892 return;
4893 }
4894
4895 switch (gen_crq->cmd) {
4896 case VERSION_EXCHANGE_RSP:
4897 rc = crq->version_exchange_rsp.rc.code;
4898 if (rc) {
4899 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4900 break;
4901 }
4902 ibmvnic_version =
4903 be16_to_cpu(crq->version_exchange_rsp.version);
4904 dev_info(dev, "Partner protocol version is %d\n",
4905 ibmvnic_version);
4906 send_query_cap(adapter);
4907 break;
4908 case QUERY_CAPABILITY_RSP:
4909 handle_query_cap_rsp(crq, adapter);
4910 break;
4911 case QUERY_MAP_RSP:
4912 handle_query_map_rsp(crq, adapter);
4913 break;
4914 case REQUEST_MAP_RSP:
4915 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4916 complete(&adapter->fw_done);
4917 break;
4918 case REQUEST_UNMAP_RSP:
4919 handle_request_unmap_rsp(crq, adapter);
4920 break;
4921 case REQUEST_CAPABILITY_RSP:
4922 handle_request_cap_rsp(crq, adapter);
4923 break;
4924 case LOGIN_RSP:
4925 netdev_dbg(netdev, "Got Login Response\n");
4926 handle_login_rsp(crq, adapter);
4927 break;
4928 case LOGICAL_LINK_STATE_RSP:
4929 netdev_dbg(netdev,
4930 "Got Logical Link State Response, state: %d rc: %d\n",
4931 crq->logical_link_state_rsp.link_state,
4932 crq->logical_link_state_rsp.rc.code);
4933 adapter->logical_link_state =
4934 crq->logical_link_state_rsp.link_state;
4935 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4936 complete(&adapter->init_done);
4937 break;
4938 case LINK_STATE_INDICATION:
4939 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4940 adapter->phys_link_state =
4941 crq->link_state_indication.phys_link_state;
4942 adapter->logical_link_state =
4943 crq->link_state_indication.logical_link_state;
4944 if (adapter->phys_link_state && adapter->logical_link_state)
4945 netif_carrier_on(netdev);
4946 else
4947 netif_carrier_off(netdev);
4948 break;
4949 case CHANGE_MAC_ADDR_RSP:
4950 netdev_dbg(netdev, "Got MAC address change Response\n");
4951 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4952 break;
4953 case ERROR_INDICATION:
4954 netdev_dbg(netdev, "Got Error Indication\n");
4955 handle_error_indication(crq, adapter);
4956 break;
4957 case REQUEST_STATISTICS_RSP:
4958 netdev_dbg(netdev, "Got Statistics Response\n");
4959 complete(&adapter->stats_done);
4960 break;
4961 case QUERY_IP_OFFLOAD_RSP:
4962 netdev_dbg(netdev, "Got Query IP offload Response\n");
4963 handle_query_ip_offload_rsp(adapter);
4964 break;
4965 case MULTICAST_CTRL_RSP:
4966 netdev_dbg(netdev, "Got multicast control Response\n");
4967 break;
4968 case CONTROL_IP_OFFLOAD_RSP:
4969 netdev_dbg(netdev, "Got Control IP offload Response\n");
4970 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4971 sizeof(adapter->ip_offload_ctrl),
4972 DMA_TO_DEVICE);
4973 complete(&adapter->init_done);
4974 break;
4975 case COLLECT_FW_TRACE_RSP:
4976 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4977 complete(&adapter->fw_done);
4978 break;
4979 case GET_VPD_SIZE_RSP:
4980 handle_vpd_size_rsp(crq, adapter);
4981 break;
4982 case GET_VPD_RSP:
4983 handle_vpd_rsp(crq, adapter);
4984 break;
4985 case QUERY_PHYS_PARMS_RSP:
4986 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4987 complete(&adapter->fw_done);
4988 break;
4989 default:
4990 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4991 gen_crq->cmd);
4992 }
4993 }
4994
4995 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4996 {
4997 struct ibmvnic_adapter *adapter = instance;
4998
4999 tasklet_schedule(&adapter->tasklet);
5000 return IRQ_HANDLED;
5001 }
5002
5003 static void ibmvnic_tasklet(struct tasklet_struct *t)
5004 {
5005 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
5006 struct ibmvnic_crq_queue *queue = &adapter->crq;
5007 union ibmvnic_crq *crq;
5008 unsigned long flags;
5009 bool done = false;
5010
5011 spin_lock_irqsave(&queue->lock, flags);
5012 while (!done) {
5013 /* Pull all the valid messages off the CRQ */
5014 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
5015 ibmvnic_handle_crq(crq, adapter);
5016 crq->generic.first = 0;
5017 }
5018
5019 /* remain in tasklet until all
5020 * capabilities responses are received
5021 */
5022 if (!adapter->wait_capability)
5023 done = true;
5024 }
5025 /* if capabilities CRQ's were sent in this tasklet, the following
5026 * tasklet must wait until all responses are received
5027 */
5028 if (atomic_read(&adapter->running_cap_crqs) != 0)
5029 adapter->wait_capability = true;
5030 spin_unlock_irqrestore(&queue->lock, flags);
5031 }
5032
5033 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
5034 {
5035 struct vio_dev *vdev = adapter->vdev;
5036 int rc;
5037
5038 do {
5039 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
5040 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
5041
5042 if (rc)
5043 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
5044
5045 return rc;
5046 }
5047
5048 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
5049 {
5050 struct ibmvnic_crq_queue *crq = &adapter->crq;
5051 struct device *dev = &adapter->vdev->dev;
5052 struct vio_dev *vdev = adapter->vdev;
5053 int rc;
5054
5055 /* Close the CRQ */
5056 do {
5057 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5058 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5059
5060 /* Clean out the queue */
5061 if (!crq->msgs)
5062 return -EINVAL;
5063
5064 memset(crq->msgs, 0, PAGE_SIZE);
5065 crq->cur = 0;
5066 crq->active = false;
5067
5068 /* And re-open it again */
5069 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5070 crq->msg_token, PAGE_SIZE);
5071
5072 if (rc == H_CLOSED)
5073 /* Adapter is good, but other end is not ready */
5074 dev_warn(dev, "Partner adapter not ready\n");
5075 else if (rc != 0)
5076 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
5077
5078 return rc;
5079 }
5080
5081 static void release_crq_queue(struct ibmvnic_adapter *adapter)
5082 {
5083 struct ibmvnic_crq_queue *crq = &adapter->crq;
5084 struct vio_dev *vdev = adapter->vdev;
5085 long rc;
5086
5087 if (!crq->msgs)
5088 return;
5089
5090 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
5091 free_irq(vdev->irq, adapter);
5092 tasklet_kill(&adapter->tasklet);
5093 do {
5094 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5095 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5096
5097 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
5098 DMA_BIDIRECTIONAL);
5099 free_page((unsigned long)crq->msgs);
5100 crq->msgs = NULL;
5101 crq->active = false;
5102 }
5103
5104 static int init_crq_queue(struct ibmvnic_adapter *adapter)
5105 {
5106 struct ibmvnic_crq_queue *crq = &adapter->crq;
5107 struct device *dev = &adapter->vdev->dev;
5108 struct vio_dev *vdev = adapter->vdev;
5109 int rc, retrc = -ENOMEM;
5110
5111 if (crq->msgs)
5112 return 0;
5113
5114 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
5115 /* Should we allocate more than one page? */
5116
5117 if (!crq->msgs)
5118 return -ENOMEM;
5119
5120 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
5121 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
5122 DMA_BIDIRECTIONAL);
5123 if (dma_mapping_error(dev, crq->msg_token))
5124 goto map_failed;
5125
5126 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5127 crq->msg_token, PAGE_SIZE);
5128
5129 if (rc == H_RESOURCE)
5130 /* maybe kexecing and resource is busy. try a reset */
5131 rc = ibmvnic_reset_crq(adapter);
5132 retrc = rc;
5133
5134 if (rc == H_CLOSED) {
5135 dev_warn(dev, "Partner adapter not ready\n");
5136 } else if (rc) {
5137 dev_warn(dev, "Error %d opening adapter\n", rc);
5138 goto reg_crq_failed;
5139 }
5140
5141 retrc = 0;
5142
5143 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
5144
5145 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
5146 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
5147 adapter->vdev->unit_address);
5148 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
5149 if (rc) {
5150 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
5151 vdev->irq, rc);
5152 goto req_irq_failed;
5153 }
5154
5155 rc = vio_enable_interrupts(vdev);
5156 if (rc) {
5157 dev_err(dev, "Error %d enabling interrupts\n", rc);
5158 goto req_irq_failed;
5159 }
5160
5161 crq->cur = 0;
5162 spin_lock_init(&crq->lock);
5163
5164 return retrc;
5165
5166 req_irq_failed:
5167 tasklet_kill(&adapter->tasklet);
5168 do {
5169 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5170 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5171 reg_crq_failed:
5172 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
5173 map_failed:
5174 free_page((unsigned long)crq->msgs);
5175 crq->msgs = NULL;
5176 return retrc;
5177 }
5178
5179 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
5180 {
5181 struct device *dev = &adapter->vdev->dev;
5182 unsigned long timeout = msecs_to_jiffies(30000);
5183 u64 old_num_rx_queues, old_num_tx_queues;
5184 int rc;
5185
5186 adapter->from_passive_init = false;
5187
5188 if (reset) {
5189 old_num_rx_queues = adapter->req_rx_queues;
5190 old_num_tx_queues = adapter->req_tx_queues;
5191 reinit_completion(&adapter->init_done);
5192 }
5193
5194 adapter->init_done_rc = 0;
5195 rc = ibmvnic_send_crq_init(adapter);
5196 if (rc) {
5197 dev_err(dev, "Send crq init failed with error %d\n", rc);
5198 return rc;
5199 }
5200
5201 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5202 dev_err(dev, "Initialization sequence timed out\n");
5203 return -1;
5204 }
5205
5206 if (adapter->init_done_rc) {
5207 release_crq_queue(adapter);
5208 return adapter->init_done_rc;
5209 }
5210
5211 if (adapter->from_passive_init) {
5212 adapter->state = VNIC_OPEN;
5213 adapter->from_passive_init = false;
5214 return -1;
5215 }
5216
5217 if (reset &&
5218 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5219 adapter->reset_reason != VNIC_RESET_MOBILITY) {
5220 if (adapter->req_rx_queues != old_num_rx_queues ||
5221 adapter->req_tx_queues != old_num_tx_queues) {
5222 release_sub_crqs(adapter, 0);
5223 rc = init_sub_crqs(adapter);
5224 } else {
5225 rc = reset_sub_crq_queues(adapter);
5226 }
5227 } else {
5228 rc = init_sub_crqs(adapter);
5229 }
5230
5231 if (rc) {
5232 dev_err(dev, "Initialization of sub crqs failed\n");
5233 release_crq_queue(adapter);
5234 return rc;
5235 }
5236
5237 rc = init_sub_crq_irqs(adapter);
5238 if (rc) {
5239 dev_err(dev, "Failed to initialize sub crq irqs\n");
5240 release_crq_queue(adapter);
5241 }
5242
5243 return rc;
5244 }
5245
5246 static struct device_attribute dev_attr_failover;
5247
5248 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5249 {
5250 struct ibmvnic_adapter *adapter;
5251 struct net_device *netdev;
5252 unsigned char *mac_addr_p;
5253 int rc;
5254
5255 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5256 dev->unit_address);
5257
5258 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5259 VETH_MAC_ADDR, NULL);
5260 if (!mac_addr_p) {
5261 dev_err(&dev->dev,
5262 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5263 __FILE__, __LINE__);
5264 return 0;
5265 }
5266
5267 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5268 IBMVNIC_MAX_QUEUES);
5269 if (!netdev)
5270 return -ENOMEM;
5271
5272 adapter = netdev_priv(netdev);
5273 adapter->state = VNIC_PROBING;
5274 dev_set_drvdata(&dev->dev, netdev);
5275 adapter->vdev = dev;
5276 adapter->netdev = netdev;
5277
5278 ether_addr_copy(adapter->mac_addr, mac_addr_p);
5279 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5280 netdev->irq = dev->irq;
5281 netdev->netdev_ops = &ibmvnic_netdev_ops;
5282 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5283 SET_NETDEV_DEV(netdev, &dev->dev);
5284
5285 spin_lock_init(&adapter->stats_lock);
5286
5287 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5288 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5289 __ibmvnic_delayed_reset);
5290 INIT_LIST_HEAD(&adapter->rwi_list);
5291 spin_lock_init(&adapter->rwi_lock);
5292 spin_lock_init(&adapter->state_lock);
5293 mutex_init(&adapter->fw_lock);
5294 init_completion(&adapter->init_done);
5295 init_completion(&adapter->fw_done);
5296 init_completion(&adapter->reset_done);
5297 init_completion(&adapter->stats_done);
5298 clear_bit(0, &adapter->resetting);
5299
5300 do {
5301 rc = init_crq_queue(adapter);
5302 if (rc) {
5303 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5304 rc);
5305 goto ibmvnic_init_fail;
5306 }
5307
5308 rc = ibmvnic_reset_init(adapter, false);
5309 if (rc && rc != EAGAIN)
5310 goto ibmvnic_init_fail;
5311 } while (rc == EAGAIN);
5312
5313 rc = init_stats_buffers(adapter);
5314 if (rc)
5315 goto ibmvnic_init_fail;
5316
5317 rc = init_stats_token(adapter);
5318 if (rc)
5319 goto ibmvnic_stats_fail;
5320
5321 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5322 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5323 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5324
5325 rc = device_create_file(&dev->dev, &dev_attr_failover);
5326 if (rc)
5327 goto ibmvnic_dev_file_err;
5328
5329 netif_carrier_off(netdev);
5330 rc = register_netdev(netdev);
5331 if (rc) {
5332 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5333 goto ibmvnic_register_fail;
5334 }
5335 dev_info(&dev->dev, "ibmvnic registered\n");
5336
5337 adapter->state = VNIC_PROBED;
5338
5339 adapter->wait_for_reset = false;
5340
5341 return 0;
5342
5343 ibmvnic_register_fail:
5344 device_remove_file(&dev->dev, &dev_attr_failover);
5345
5346 ibmvnic_dev_file_err:
5347 release_stats_token(adapter);
5348
5349 ibmvnic_stats_fail:
5350 release_stats_buffers(adapter);
5351
5352 ibmvnic_init_fail:
5353 release_sub_crqs(adapter, 1);
5354 release_crq_queue(adapter);
5355 mutex_destroy(&adapter->fw_lock);
5356 free_netdev(netdev);
5357
5358 return rc;
5359 }
5360
5361 static int ibmvnic_remove(struct vio_dev *dev)
5362 {
5363 struct net_device *netdev = dev_get_drvdata(&dev->dev);
5364 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5365 unsigned long flags;
5366
5367 spin_lock_irqsave(&adapter->state_lock, flags);
5368 if (test_bit(0, &adapter->resetting)) {
5369 spin_unlock_irqrestore(&adapter->state_lock, flags);
5370 return -EBUSY;
5371 }
5372
5373 adapter->state = VNIC_REMOVING;
5374 spin_unlock_irqrestore(&adapter->state_lock, flags);
5375
5376 flush_work(&adapter->ibmvnic_reset);
5377 flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5378
5379 rtnl_lock();
5380 unregister_netdevice(netdev);
5381
5382 release_resources(adapter);
5383 release_sub_crqs(adapter, 1);
5384 release_crq_queue(adapter);
5385
5386 release_stats_token(adapter);
5387 release_stats_buffers(adapter);
5388
5389 adapter->state = VNIC_REMOVED;
5390
5391 rtnl_unlock();
5392 mutex_destroy(&adapter->fw_lock);
5393 device_remove_file(&dev->dev, &dev_attr_failover);
5394 free_netdev(netdev);
5395 dev_set_drvdata(&dev->dev, NULL);
5396
5397 return 0;
5398 }
5399
5400 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5401 const char *buf, size_t count)
5402 {
5403 struct net_device *netdev = dev_get_drvdata(dev);
5404 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5405 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5406 __be64 session_token;
5407 long rc;
5408
5409 if (!sysfs_streq(buf, "1"))
5410 return -EINVAL;
5411
5412 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5413 H_GET_SESSION_TOKEN, 0, 0, 0);
5414 if (rc) {
5415 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5416 rc);
5417 return -EINVAL;
5418 }
5419
5420 session_token = (__be64)retbuf[0];
5421 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5422 be64_to_cpu(session_token));
5423 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5424 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5425 if (rc) {
5426 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5427 rc);
5428 return -EINVAL;
5429 }
5430
5431 return count;
5432 }
5433
5434 static DEVICE_ATTR_WO(failover);
5435
5436 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5437 {
5438 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5439 struct ibmvnic_adapter *adapter;
5440 struct iommu_table *tbl;
5441 unsigned long ret = 0;
5442 int i;
5443
5444 tbl = get_iommu_table_base(&vdev->dev);
5445
5446 /* netdev inits at probe time along with the structures we need below*/
5447 if (!netdev)
5448 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5449
5450 adapter = netdev_priv(netdev);
5451
5452 ret += PAGE_SIZE; /* the crq message queue */
5453 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5454
5455 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5456 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5457
5458 for (i = 0; i < adapter->num_active_rx_pools; i++)
5459 ret += adapter->rx_pool[i].size *
5460 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5461
5462 return ret;
5463 }
5464
5465 static int ibmvnic_resume(struct device *dev)
5466 {
5467 struct net_device *netdev = dev_get_drvdata(dev);
5468 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5469
5470 if (adapter->state != VNIC_OPEN)
5471 return 0;
5472
5473 tasklet_schedule(&adapter->tasklet);
5474
5475 return 0;
5476 }
5477
5478 static const struct vio_device_id ibmvnic_device_table[] = {
5479 {"network", "IBM,vnic"},
5480 {"", "" }
5481 };
5482 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5483
5484 static const struct dev_pm_ops ibmvnic_pm_ops = {
5485 .resume = ibmvnic_resume
5486 };
5487
5488 static struct vio_driver ibmvnic_driver = {
5489 .id_table = ibmvnic_device_table,
5490 .probe = ibmvnic_probe,
5491 .remove = ibmvnic_remove,
5492 .get_desired_dma = ibmvnic_get_desired_dma,
5493 .name = ibmvnic_driver_name,
5494 .pm = &ibmvnic_pm_ops,
5495 };
5496
5497 /* module functions */
5498 static int __init ibmvnic_module_init(void)
5499 {
5500 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5501 IBMVNIC_DRIVER_VERSION);
5502
5503 return vio_register_driver(&ibmvnic_driver);
5504 }
5505
5506 static void __exit ibmvnic_module_exit(void)
5507 {
5508 vio_unregister_driver(&ibmvnic_driver);
5509 }
5510
5511 module_init(ibmvnic_module_init);
5512 module_exit(ibmvnic_module_exit);
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