1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /* Copyright © 2003-2011 Emulex. All rights reserved. */
23
24 /*
25 * Source file containing Queue handling functions
26 *
27 */
28
29 #include <oce_impl.h>
30 extern struct oce_dev *oce_dev_list[];
31
32 int oce_destroy_q(struct oce_dev *oce, struct oce_mbx *mbx, size_t req_size,
33 enum qtype qtype);
34 /* MAil box Queue functions */
35 struct oce_mq *
36 oce_mq_create(struct oce_dev *dev, struct oce_eq *eq, uint32_t q_len);
37
38 /* event queue handling */
39 struct oce_eq *
40 oce_eq_create(struct oce_dev *dev, uint32_t q_len, uint32_t item_size,
41 uint32_t eq_delay);
42
43 /* completion queue handling */
44 struct oce_cq *
45 oce_cq_create(struct oce_dev *dev, struct oce_eq *eq, uint32_t q_len,
46 uint32_t item_size, boolean_t sol_event, boolean_t is_eventable,
47 boolean_t nodelay, uint32_t ncoalesce);
48
49
50 /* Tx WQ functions */
51 static struct oce_wq *oce_wq_init(struct oce_dev *dev, uint32_t q_len,
52 int wq_type);
53 static void oce_wq_fini(struct oce_dev *dev, struct oce_wq *wq);
54 static int oce_wq_create(struct oce_wq *wq, struct oce_eq *eq);
55 static void oce_wq_del(struct oce_dev *dev, struct oce_wq *wq);
56 /* Rx Queue functions */
57 static struct oce_rq *oce_rq_init(struct oce_dev *dev, uint32_t q_len,
58 uint32_t frag_size, uint32_t mtu,
59 boolean_t rss);
60 static void oce_rq_fini(struct oce_dev *dev, struct oce_rq *rq);
61 static int oce_rq_create(struct oce_rq *rq, uint32_t if_id, struct oce_eq *eq);
62 static void oce_rq_del(struct oce_dev *dev, struct oce_rq *rq);
63
64 /*
65 * function to create an event queue
66 *
67 * dev - software handle to the device
68 * eqcfg - pointer to a config structure containg the eq parameters
69 *
70 * return pointer to EQ; NULL on failure
71 */
72 struct oce_eq *
73 oce_eq_create(struct oce_dev *dev, uint32_t q_len, uint32_t item_size,
74 uint32_t eq_delay)
75 {
76 struct oce_eq *eq;
77 struct oce_mbx mbx;
78 struct mbx_create_common_eq *fwcmd;
79 int ret = 0;
80
81 /* allocate an eq */
82 eq = kmem_zalloc(sizeof (struct oce_eq), KM_NOSLEEP);
83
84 if (eq == NULL) {
85 return (NULL);
86 }
87
88 bzero(&mbx, sizeof (struct oce_mbx));
89 /* allocate mbx */
90 fwcmd = (struct mbx_create_common_eq *)&mbx.payload;
91
92 eq->ring = create_ring_buffer(dev, q_len,
93 item_size, DDI_DMA_CONSISTENT);
94
95 if (eq->ring == NULL) {
96 oce_log(dev, CE_WARN, MOD_CONFIG,
97 "EQ ring alloc failed:0x%p", (void *)eq->ring);
98 kmem_free(eq, sizeof (struct oce_eq));
99 return (NULL);
100 }
101
102 mbx_common_req_hdr_init(&fwcmd->hdr, 0, 0,
103 MBX_SUBSYSTEM_COMMON,
104 OPCODE_CREATE_COMMON_EQ, MBX_TIMEOUT_SEC,
105 sizeof (struct mbx_create_common_eq));
106
107 fwcmd->params.req.num_pages = eq->ring->dbuf->num_pages;
108 oce_page_list(eq->ring->dbuf, &fwcmd->params.req.pages[0],
109 eq->ring->dbuf->num_pages);
110
111 /* dw 0 */
112 fwcmd->params.req.eq_ctx.size = (item_size == 4) ? 0 : 1;
113 fwcmd->params.req.eq_ctx.valid = 1;
114 /* dw 1 */
115 fwcmd->params.req.eq_ctx.armed = 0;
116 fwcmd->params.req.eq_ctx.pd = 0;
117 fwcmd->params.req.eq_ctx.count = OCE_LOG2(q_len/256);
118
119 /* dw 2 */
120 fwcmd->params.req.eq_ctx.function = dev->fn;
121 fwcmd->params.req.eq_ctx.nodelay = 0;
122 fwcmd->params.req.eq_ctx.phase = 0;
123 /* todo: calculate multiplier from max min and cur */
124 fwcmd->params.req.eq_ctx.delay_mult = eq_delay;
125
126 /* fill rest of mbx */
127 mbx.u0.s.embedded = 1;
128 mbx.payload_length = sizeof (struct mbx_create_common_eq);
129 DW_SWAP(u32ptr(&mbx), mbx.payload_length + OCE_BMBX_RHDR_SZ);
130
131 /* now post the command */
132 ret = oce_mbox_post(dev, &mbx, NULL);
133
134 if (ret != 0) {
135 oce_log(dev, CE_WARN, MOD_CONFIG, "EQ create failed: %d", ret);
136 destroy_ring_buffer(dev, eq->ring);
137 kmem_free(eq, sizeof (struct oce_eq));
138 return (NULL);
139 }
140
141 /* interpret the response */
142 eq->eq_id = LE_16(fwcmd->params.rsp.eq_id);
143 eq->eq_cfg.q_len = q_len;
144 eq->eq_cfg.item_size = item_size;
145 eq->eq_cfg.cur_eqd = (uint8_t)eq_delay;
146 eq->parent = (void *)dev;
147 atomic_inc_32(&dev->neqs);
148 oce_log(dev, CE_NOTE, MOD_CONFIG,
149 "EQ created, eq=0x%p eq_id=0x%x", (void *)eq, eq->eq_id);
150 /* Save the eq pointer */
151 return (eq);
152 } /* oce_eq_create */
153
154 /*
155 * function to delete an event queue
156 *
157 * dev - software handle to the device
158 * eq - handle to the eq to be deleted
159 *
160 * return 0=>success, failure otherwise
161 */
162 void
163 oce_eq_del(struct oce_dev *dev, struct oce_eq *eq)
164 {
165 struct oce_mbx mbx;
166 struct mbx_destroy_common_eq *fwcmd;
167
168 /* drain the residual events */
169 oce_drain_eq(eq);
170
171 /* destroy the ring */
172 destroy_ring_buffer(dev, eq->ring);
173 eq->ring = NULL;
174
175 /* send a command to delete the EQ */
176 fwcmd = (struct mbx_destroy_common_eq *)&mbx.payload;
177 fwcmd->params.req.id = eq->eq_id;
178 (void) oce_destroy_q(dev, &mbx,
179 sizeof (struct mbx_destroy_common_eq),
180 QTYPE_EQ);
181 kmem_free(eq, sizeof (struct oce_eq));
182 atomic_dec_32(&dev->neqs);
183 }
184
185 /*
186 * function to create a completion queue
187 *
188 * dev - software handle to the device
189 * eq - optional eq to be associated with to the cq
190 * cqcfg - configuration for this queue
191 *
192 * return pointer to the cq created. NULL on failure
193 */
194 struct oce_cq *
195 oce_cq_create(struct oce_dev *dev, struct oce_eq *eq, uint32_t q_len,
196 uint32_t item_size, boolean_t sol_event, boolean_t is_eventable,
197 boolean_t nodelay, uint32_t ncoalesce)
198 {
199 struct oce_cq *cq = NULL;
200 struct oce_mbx mbx;
201 struct mbx_create_common_cq *fwcmd;
202 int ret = 0;
203
204 /* create cq */
205 cq = kmem_zalloc(sizeof (struct oce_cq), KM_NOSLEEP);
206 if (cq == NULL) {
207 oce_log(dev, CE_NOTE, MOD_CONFIG, "%s",
208 "CQ allocation failed");
209 return (NULL);
210 }
211
212 /* create the ring buffer for this queue */
213 cq->ring = create_ring_buffer(dev, q_len,
214 item_size, DDI_DMA_CONSISTENT);
215 if (cq->ring == NULL) {
216 oce_log(dev, CE_WARN, MOD_CONFIG,
217 "CQ ring alloc failed:0x%p",
218 (void *)cq->ring);
219 kmem_free(cq, sizeof (struct oce_cq));
220 return (NULL);
221 }
222 /* initialize mailbox */
223 bzero(&mbx, sizeof (struct oce_mbx));
224 fwcmd = (struct mbx_create_common_cq *)&mbx.payload;
225
226 /* fill the command header */
227 mbx_common_req_hdr_init(&fwcmd->hdr, 0, 0,
228 MBX_SUBSYSTEM_COMMON,
229 OPCODE_CREATE_COMMON_CQ, MBX_TIMEOUT_SEC,
230 sizeof (struct mbx_create_common_cq));
231
232 /* fill command context */
233 /* dw0 */
234 fwcmd->params.req.cq_ctx.eventable = is_eventable;
235 fwcmd->params.req.cq_ctx.sol_event = sol_event;
236 fwcmd->params.req.cq_ctx.valid = 1;
237 fwcmd->params.req.cq_ctx.count = OCE_LOG2(q_len/256);
238 fwcmd->params.req.cq_ctx.nodelay = nodelay;
239 fwcmd->params.req.cq_ctx.coalesce_wm = ncoalesce;
240
241 /* dw1 */
242 fwcmd->params.req.cq_ctx.armed = B_FALSE;
243 fwcmd->params.req.cq_ctx.eq_id = eq->eq_id;
244 fwcmd->params.req.cq_ctx.pd = 0;
245 /* dw2 */
246 fwcmd->params.req.cq_ctx.function = dev->fn;
247
248 /* fill the rest of the command */
249 fwcmd->params.req.num_pages = cq->ring->dbuf->num_pages;
250 oce_page_list(cq->ring->dbuf, &fwcmd->params.req.pages[0],
251 cq->ring->dbuf->num_pages);
252
253 /* fill rest of mbx */
254 mbx.u0.s.embedded = 1;
255 mbx.payload_length = sizeof (struct mbx_create_common_cq);
256 DW_SWAP(u32ptr(&mbx), mbx.payload_length + OCE_BMBX_RHDR_SZ);
257
258 /* now send the mail box */
259 ret = oce_mbox_post(dev, &mbx, NULL);
260
261 if (ret != 0) {
262 oce_log(dev, CE_WARN, MOD_CONFIG,
263 "CQ create failed: 0x%x", ret);
264 destroy_ring_buffer(dev, cq->ring);
265 kmem_free(cq, sizeof (struct oce_cq));
266 return (NULL);
267 }
268
269 cq->parent = dev;
270 cq->eq = eq; /* eq array index */
271 cq->cq_cfg.q_len = q_len;
272 cq->cq_cfg.item_size = item_size;
273 cq->cq_cfg.sol_eventable = (uint8_t)sol_event;
274 cq->cq_cfg.nodelay = (uint8_t)nodelay;
275 /* interpret the response */
276 cq->cq_id = LE_16(fwcmd->params.rsp.cq_id);
277 dev->cq[cq->cq_id % OCE_MAX_CQ] = cq;
278 atomic_inc_32(&eq->ref_count);
279 return (cq);
280 } /* oce_cq_create */
281
282 /*
283 * function to delete a completion queue
284 *
285 * dev - software handle to the device
286 * cq - handle to the CQ to delete
287 *
288 * return none
289 */
290 static void
291 oce_cq_del(struct oce_dev *dev, struct oce_cq *cq)
292 {
293 struct oce_mbx mbx;
294 struct mbx_destroy_common_cq *fwcmd;
295
296 /* destroy the ring */
297 destroy_ring_buffer(dev, cq->ring);
298 cq->ring = NULL;
299
300 bzero(&mbx, sizeof (struct oce_mbx));
301 /* send a command to delete the CQ */
302 fwcmd = (struct mbx_destroy_common_cq *)&mbx.payload;
303 fwcmd->params.req.id = cq->cq_id;
304 (void) oce_destroy_q(dev, &mbx,
305 sizeof (struct mbx_destroy_common_cq),
306 QTYPE_CQ);
307
308 /* Reset the handler */
309 cq->cq_handler = NULL;
310 dev->cq[cq->cq_id % OCE_MAX_CQ] = NULL;
311 atomic_dec_32(&cq->eq->ref_count);
312 mutex_destroy(&cq->lock);
313
314 /* release the eq */
315 kmem_free(cq, sizeof (struct oce_cq));
316 } /* oce_cq_del */
317
318 /*
319 * function to create an MQ
320 *
321 * dev - software handle to the device
322 * eq - the EQ to associate with the MQ for event notification
323 * q_len - the number of entries to create in the MQ
324 *
325 * return pointer to the created MQ, failure otherwise
326 */
327 struct oce_mq *
328 oce_mq_create(struct oce_dev *dev, struct oce_eq *eq, uint32_t q_len)
329 {
330 struct oce_mbx mbx;
331 struct mbx_create_common_mq *fwcmd;
332 struct oce_mq *mq = NULL;
333 int ret = 0;
334 struct oce_cq *cq;
335
336 /* Create the Completion Q */
337 cq = oce_cq_create(dev, eq, CQ_LEN_256,
338 sizeof (struct oce_mq_cqe),
339 B_FALSE, B_TRUE, B_TRUE, 0);
340 if (cq == NULL) {
341 return (NULL);
342 }
343
344
345 /* allocate the mq */
346 mq = kmem_zalloc(sizeof (struct oce_mq), KM_NOSLEEP);
347
348 if (mq == NULL) {
349 goto mq_alloc_fail;
350 }
351
352 bzero(&mbx, sizeof (struct oce_mbx));
353 /* allocate mbx */
354 fwcmd = (struct mbx_create_common_mq *)&mbx.payload;
355
356 /* create the ring buffer for this queue */
357 mq->ring = create_ring_buffer(dev, q_len,
358 sizeof (struct oce_mbx), DDI_DMA_CONSISTENT | DDI_DMA_RDWR);
359 if (mq->ring == NULL) {
360 oce_log(dev, CE_WARN, MOD_CONFIG,
361 "MQ ring alloc failed:0x%p",
362 (void *)mq->ring);
363 goto mq_ring_alloc;
364 }
365
366 mbx_common_req_hdr_init(&fwcmd->hdr, 0, 0,
367 MBX_SUBSYSTEM_COMMON,
368 OPCODE_CREATE_COMMON_MQ, MBX_TIMEOUT_SEC,
369 sizeof (struct mbx_create_common_mq));
370
371 fwcmd->params.req.num_pages = mq->ring->dbuf->num_pages;
372 oce_page_list(mq->ring->dbuf, fwcmd->params.req.pages,
373 mq->ring->dbuf->num_pages);
374 fwcmd->params.req.context.u0.s.cq_id = cq->cq_id;
375 fwcmd->params.req.context.u0.s.ring_size =
376 OCE_LOG2(q_len) + 1;
377 fwcmd->params.req.context.u0.s.valid = 1;
378 fwcmd->params.req.context.u0.s.fid = dev->fn;
379
380 /* fill rest of mbx */
381 mbx.u0.s.embedded = 1;
382 mbx.payload_length = sizeof (struct mbx_create_common_mq);
383 DW_SWAP(u32ptr(&mbx), mbx.payload_length + OCE_BMBX_RHDR_SZ);
384
385 /* now send the mail box */
386 ret = oce_mbox_post(dev, &mbx, NULL);
387 if (ret != DDI_SUCCESS) {
388 oce_log(dev, CE_WARN, MOD_CONFIG,
389 "MQ create failed: 0x%x", ret);
390 goto mq_fail;
391 }
392
393 /* interpret the response */
394 mq->mq_id = LE_16(fwcmd->params.rsp.mq_id);
395 mq->cq = cq;
396 mq->cfg.q_len = (uint8_t)q_len;
397 mq->cfg.eqd = 0;
398
399 /* fill rest of the mq */
400 mq->parent = dev;
401
402 /* set the MQCQ handlers */
403 cq->cq_handler = oce_drain_mq_cq;
404 cq->cb_arg = (void *)mq;
405 mutex_init(&mq->lock, NULL, MUTEX_DRIVER,
406 DDI_INTR_PRI(dev->intr_pri));
407 return (mq);
408
409 mq_fail:
410 destroy_ring_buffer(dev, mq->ring);
411 mq_ring_alloc:
412 kmem_free(mq, sizeof (struct oce_mq));
413 mq_alloc_fail:
414 oce_cq_del(dev, cq);
415 return (NULL);
416 } /* oce_mq_create */
417
418 /*
419 * function to delete an MQ
420 *
421 * dev - software handle to the device
422 * mq - pointer to the MQ to delete
423 *
424 * return none
425 */
426 static void
427 oce_mq_del(struct oce_dev *dev, struct oce_mq *mq)
428 {
429 struct oce_mbx mbx;
430 struct mbx_destroy_common_mq *fwcmd;
431
432 /* destroy the ring */
433 destroy_ring_buffer(dev, mq->ring);
434 mq->ring = NULL;
435 bzero(&mbx, sizeof (struct oce_mbx));
436 fwcmd = (struct mbx_destroy_common_mq *)&mbx.payload;
437 fwcmd->params.req.id = mq->mq_id;
438 (void) oce_destroy_q(dev, &mbx,
439 sizeof (struct mbx_destroy_common_mq),
440 QTYPE_MQ);
441 oce_cq_del(dev, mq->cq);
442 mq->cq = NULL;
443 mutex_destroy(&mq->lock);
444 kmem_free(mq, sizeof (struct oce_mq));
445 } /* oce_mq_del */
446
447 /*
448 * function to create a WQ for NIC Tx
449 *
450 * dev - software handle to the device
451 * wqcfg - configuration structure providing WQ config parameters
452 *
453 * return pointer to the WQ created. NULL on failure
454 */
455 static struct oce_wq *
456 oce_wq_init(struct oce_dev *dev, uint32_t q_len, int wq_type)
457 {
458 struct oce_wq *wq;
459 char str[MAX_POOL_NAME];
460 int ret;
461 static int wq_id = 0;
462
463 ASSERT(dev != NULL);
464 /* q_len must be min 256 and max 2k */
465 if (q_len < 256 || q_len > 2048) {
466 oce_log(dev, CE_WARN, MOD_CONFIG,
467 "Invalid q length. Must be "
468 "[256, 2000]: 0x%x", q_len);
469 return (NULL);
470 }
471
472 /* allocate wq */
473 wq = kmem_zalloc(sizeof (struct oce_wq), KM_NOSLEEP);
474 if (wq == NULL) {
475 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
476 "WQ allocation failed");
477 return (NULL);
478 }
479
480 /* Set the wq config */
481 wq->cfg.q_len = q_len;
482 wq->cfg.wq_type = (uint8_t)wq_type;
483 wq->cfg.eqd = OCE_DEFAULT_WQ_EQD;
484 wq->cfg.nbufs = 2 * wq->cfg.q_len;
485 wq->cfg.nhdl = 2 * wq->cfg.q_len;
486 wq->cfg.buf_size = dev->tx_bcopy_limit;
487
488 /* assign parent */
489 wq->parent = (void *)dev;
490
491 /* Create the WQ Buffer pool */
492 ret = oce_wqb_cache_create(wq, wq->cfg.buf_size);
493 if (ret != DDI_SUCCESS) {
494 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
495 "WQ Buffer Pool create failed ");
496 goto wqb_fail;
497 }
498
499 /* Create a pool of memory handles */
500 ret = oce_wqm_cache_create(wq);
501 if (ret != DDI_SUCCESS) {
502 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
503 "WQ MAP Handles Pool create failed ");
504 goto wqm_fail;
505 }
506
507 (void) snprintf(str, MAX_POOL_NAME, "%s%d%s%d", "oce_wqed_",
508 dev->dev_id, "_", wq_id++);
509 wq->wqed_cache = kmem_cache_create(str, sizeof (oce_wqe_desc_t),
510 0, NULL, NULL, NULL, NULL, NULL, 0);
511 if (wq->wqed_cache == NULL) {
512 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
513 "WQ Packet Desc Pool create failed ");
514 goto wqed_fail;
515 }
516
517 /* create the ring buffer */
518 wq->ring = create_ring_buffer(dev, q_len,
519 NIC_WQE_SIZE, DDI_DMA_CONSISTENT | DDI_DMA_RDWR);
520 if (wq->ring == NULL) {
521 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
522 "Failed to create WQ ring ");
523 goto wq_ringfail;
524 }
525
526 /* Initialize WQ lock */
527 mutex_init(&wq->tx_lock, NULL, MUTEX_DRIVER,
528 DDI_INTR_PRI(dev->intr_pri));
529 /* Initialize WQ lock */
530 mutex_init(&wq->txc_lock, NULL, MUTEX_DRIVER,
531 DDI_INTR_PRI(dev->intr_pri));
532 atomic_inc_32(&dev->nwqs);
533
534 OCE_LIST_CREATE(&wq->wqe_desc_list, DDI_INTR_PRI(dev->intr_pri));
535 return (wq);
536
537 wqcq_fail:
538 destroy_ring_buffer(dev, wq->ring);
539 wq_ringfail:
540 kmem_cache_destroy(wq->wqed_cache);
541 wqed_fail:
542 oce_wqm_cache_destroy(wq);
543 wqm_fail:
544 oce_wqb_cache_destroy(wq);
545 wqb_fail:
546 kmem_free(wq, sizeof (struct oce_wq));
547 return (NULL);
548 } /* oce_wq_create */
549
550 /*
551 * function to delete a WQ
552 *
553 * dev - software handle to the device
554 * wq - WQ to delete
555 *
556 * return 0 => success, failure otherwise
557 */
558 static void
559 oce_wq_fini(struct oce_dev *dev, struct oce_wq *wq)
560 {
561 /* destroy cq */
562 oce_wqb_cache_destroy(wq);
563 oce_wqm_cache_destroy(wq);
564 kmem_cache_destroy(wq->wqed_cache);
565
566 /* Free the packet descriptor list */
567 OCE_LIST_DESTROY(&wq->wqe_desc_list);
568 destroy_ring_buffer(dev, wq->ring);
569 wq->ring = NULL;
570 /* Destroy the Mutex */
571 mutex_destroy(&wq->tx_lock);
572 mutex_destroy(&wq->txc_lock);
573 kmem_free(wq, sizeof (struct oce_wq));
574 atomic_dec_32(&dev->nwqs);
575 } /* oce_wq_del */
576
577
578 static int
579 oce_wq_create(struct oce_wq *wq, struct oce_eq *eq)
580 {
581
582 struct oce_mbx mbx;
583 struct mbx_create_nic_wq *fwcmd;
584 struct oce_dev *dev = wq->parent;
585 struct oce_cq *cq;
586 int ret;
587
588 /* create the CQ */
589 cq = oce_cq_create(dev, eq, CQ_LEN_1024,
590 sizeof (struct oce_nic_tx_cqe),
591 B_FALSE, B_TRUE, B_FALSE, 3);
592 if (cq == NULL) {
593 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
594 "WCCQ create failed ");
595 return (DDI_FAILURE);
596 }
597 /* now fill the command */
598 bzero(&mbx, sizeof (struct oce_mbx));
599 fwcmd = (struct mbx_create_nic_wq *)&mbx.payload;
600 mbx_common_req_hdr_init(&fwcmd->hdr, 0, 0,
601 MBX_SUBSYSTEM_NIC,
602 OPCODE_CREATE_NIC_WQ, MBX_TIMEOUT_SEC,
603 sizeof (struct mbx_create_nic_wq));
604
605 fwcmd->params.req.nic_wq_type = (uint8_t)wq->cfg.wq_type;
606 fwcmd->params.req.num_pages = wq->ring->dbuf->num_pages;
607 oce_log(dev, CE_NOTE, MOD_CONFIG, "NUM_PAGES = 0x%d size = %lu",
608 (uint32_t)wq->ring->dbuf->num_pages,
609 wq->ring->dbuf->size);
610
611 /* workaround: fill 0x01 for ulp_mask in rsvd0 */
612 fwcmd->params.req.rsvd0 = 0x01;
613 fwcmd->params.req.wq_size = OCE_LOG2(wq->cfg.q_len) + 1;
614 fwcmd->params.req.valid = 1;
615 fwcmd->params.req.pd_id = 0;
616 fwcmd->params.req.pci_function_id = dev->fn;
617 fwcmd->params.req.cq_id = cq->cq_id;
618
619 oce_page_list(wq->ring->dbuf, fwcmd->params.req.pages,
620 wq->ring->dbuf->num_pages);
621
622 /* fill rest of mbx */
623 mbx.u0.s.embedded = 1;
624 mbx.payload_length = sizeof (struct mbx_create_nic_wq);
625 DW_SWAP(u32ptr(&mbx), mbx.payload_length + OCE_BMBX_RHDR_SZ);
626
627 /* now post the command */
628 ret = oce_mbox_post(dev, &mbx, NULL);
629 if (ret != DDI_SUCCESS) {
630 oce_log(dev, CE_WARN, MOD_CONFIG,
631 "WQ create failed: %d", ret);
632 oce_cq_del(dev, cq);
633 return (ret);
634 }
635
636 /* interpret the response */
637 wq->wq_id = LE_16(fwcmd->params.rsp.wq_id);
638 wq->qstate = QCREATED;
639 wq->cq = cq;
640 /* set the WQCQ handlers */
641 wq->cq->cq_handler = oce_drain_wq_cq;
642 wq->cq->cb_arg = (void *)wq;
643 /* All are free to start with */
644 wq->wq_free = wq->cfg.q_len;
645 /* reset indicies */
646 wq->ring->cidx = 0;
647 wq->ring->pidx = 0;
648 oce_log(dev, CE_NOTE, MOD_CONFIG, "WQ CREATED WQID = %d",
649 wq->wq_id);
650
651 return (0);
652 }
653
654 /*
655 * function to delete a WQ
656 *
657 * dev - software handle to the device
658 * wq - WQ to delete
659 *
660 * return none
661 */
662 static void
663 oce_wq_del(struct oce_dev *dev, struct oce_wq *wq)
664 {
665 struct oce_mbx mbx;
666 struct mbx_delete_nic_wq *fwcmd;
667
668
669 ASSERT(dev != NULL);
670 ASSERT(wq != NULL);
671 if (wq->qstate == QCREATED) {
672 bzero(&mbx, sizeof (struct oce_mbx));
673 /* now fill the command */
674 fwcmd = (struct mbx_delete_nic_wq *)&mbx.payload;
675 fwcmd->params.req.wq_id = wq->wq_id;
676 (void) oce_destroy_q(dev, &mbx,
677 sizeof (struct mbx_delete_nic_wq),
678 QTYPE_WQ);
679 wq->qstate = QDELETED;
680 oce_cq_del(dev, wq->cq);
681 wq->cq = NULL;
682 }
683 } /* oce_wq_del */
684
685 /*
686 * function to allocate RQ resources
687 *
688 * dev - software handle to the device
689 * rqcfg - configuration structure providing RQ config parameters
690 *
691 * return pointer to the RQ created. NULL on failure
692 */
693 static struct oce_rq *
694 oce_rq_init(struct oce_dev *dev, uint32_t q_len,
695 uint32_t frag_size, uint32_t mtu,
696 boolean_t rss)
697 {
698
699 struct oce_rq *rq;
700 int ret;
701
702 /* validate q creation parameters */
703 if (!OCE_LOG2(frag_size))
704 return (NULL);
705 if ((q_len == 0) || (q_len > 1024))
706 return (NULL);
707
708 /* allocate the rq */
709 rq = kmem_zalloc(sizeof (struct oce_rq), KM_NOSLEEP);
710 if (rq == NULL) {
711 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
712 "RQ allocation failed");
713 return (NULL);
714 }
715
716 rq->cfg.q_len = q_len;
717 rq->cfg.frag_size = frag_size;
718 rq->cfg.mtu = mtu;
719 rq->cfg.eqd = 0;
720 rq->cfg.nbufs = dev->rq_max_bufs;
721 rq->cfg.is_rss_queue = rss;
722
723 /* assign parent */
724 rq->parent = (void *)dev;
725
726 rq->rq_bdesc_array =
727 kmem_zalloc((sizeof (oce_rq_bdesc_t) * rq->cfg.nbufs), KM_NOSLEEP);
728 if (rq->rq_bdesc_array == NULL) {
729 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
730 "RQ bdesc alloc failed");
731 goto rqbd_alloc_fail;
732 }
733 /* create the rq buffer descriptor ring */
734 rq->shadow_ring =
735 kmem_zalloc((rq->cfg.q_len * sizeof (oce_rq_bdesc_t *)),
736 KM_NOSLEEP);
737 if (rq->shadow_ring == NULL) {
738 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
739 "RQ shadow ring alloc failed ");
740 goto rq_shdw_fail;
741 }
742
743 /* allocate the free list array */
744 rq->rqb_freelist =
745 kmem_zalloc(rq->cfg.nbufs * sizeof (oce_rq_bdesc_t *), KM_NOSLEEP);
746 if (rq->rqb_freelist == NULL) {
747 goto rqb_free_list_fail;
748 }
749 /* create the buffer pool */
750 ret = oce_rqb_cache_create(rq, dev->rq_frag_size +
751 OCE_RQE_BUF_HEADROOM);
752 if (ret != DDI_SUCCESS) {
753 goto rqb_fail;
754 }
755
756 /* create the ring buffer */
757 rq->ring = create_ring_buffer(dev, q_len,
758 sizeof (struct oce_nic_rqe), DDI_DMA_CONSISTENT | DDI_DMA_RDWR);
759 if (rq->ring == NULL) {
760 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
761 "RQ ring create failed ");
762 goto rq_ringfail;
763 }
764
765 /* Initialize the RQ lock */
766 mutex_init(&rq->rx_lock, NULL, MUTEX_DRIVER,
767 DDI_INTR_PRI(dev->intr_pri));
768 /* Initialize the recharge lock */
769 mutex_init(&rq->rc_lock, NULL, MUTEX_DRIVER,
770 DDI_INTR_PRI(dev->intr_pri));
771 atomic_inc_32(&dev->nrqs);
772 return (rq);
773
774 rq_ringfail:
775 oce_rqb_cache_destroy(rq);
776 rqb_fail:
777 kmem_free(rq->rqb_freelist,
778 (rq->cfg.nbufs * sizeof (oce_rq_bdesc_t *)));
779 rqb_free_list_fail:
780
781 kmem_free(rq->shadow_ring,
782 (rq->cfg.q_len * sizeof (oce_rq_bdesc_t *)));
783 rq_shdw_fail:
784 kmem_free(rq->rq_bdesc_array,
785 (sizeof (oce_rq_bdesc_t) * rq->cfg.nbufs));
786 rqbd_alloc_fail:
787 kmem_free(rq, sizeof (struct oce_rq));
788 return (NULL);
789 } /* oce_rq_create */
790
791 /*
792 * function to delete an RQ
793 *
794 * dev - software handle to the device
795 * rq - RQ to delete
796 *
797 * return none
798 */
799 static void
800 oce_rq_fini(struct oce_dev *dev, struct oce_rq *rq)
801 {
802 /* Destroy buffer cache */
803 oce_rqb_cache_destroy(rq);
804 destroy_ring_buffer(dev, rq->ring);
805 rq->ring = NULL;
806 kmem_free(rq->shadow_ring,
807 sizeof (oce_rq_bdesc_t *) * rq->cfg.q_len);
808 rq->shadow_ring = NULL;
809 kmem_free(rq->rq_bdesc_array,
810 (sizeof (oce_rq_bdesc_t) * rq->cfg.nbufs));
811 rq->rq_bdesc_array = NULL;
812 kmem_free(rq->rqb_freelist,
813 (rq->cfg.nbufs * sizeof (oce_rq_bdesc_t *)));
814 rq->rqb_freelist = NULL;
815 mutex_destroy(&rq->rx_lock);
816 mutex_destroy(&rq->rc_lock);
817 kmem_free(rq, sizeof (struct oce_rq));
818 atomic_dec_32(&dev->nrqs);
819 } /* oce_rq_del */
820
821
822 static int
823 oce_rq_create(struct oce_rq *rq, uint32_t if_id, struct oce_eq *eq)
824 {
825 struct oce_mbx mbx;
826 struct mbx_create_nic_rq *fwcmd;
827 struct oce_dev *dev = rq->parent;
828 struct oce_cq *cq;
829 int ret;
830
831 cq = oce_cq_create(dev, eq, CQ_LEN_1024, sizeof (struct oce_nic_rx_cqe),
832 B_FALSE, B_TRUE, B_FALSE, 3);
833
834 if (cq == NULL) {
835 return (DDI_FAILURE);
836 }
837
838 /* now fill the command */
839 bzero(&mbx, sizeof (struct oce_mbx));
840 fwcmd = (struct mbx_create_nic_rq *)&mbx.payload;
841 mbx_common_req_hdr_init(&fwcmd->hdr, 0, 0,
842 MBX_SUBSYSTEM_NIC,
843 OPCODE_CREATE_NIC_RQ, MBX_TIMEOUT_SEC,
844 sizeof (struct mbx_create_nic_rq));
845
846 fwcmd->params.req.num_pages = rq->ring->dbuf->num_pages;
847 fwcmd->params.req.frag_size = OCE_LOG2(rq->cfg.frag_size);
848 fwcmd->params.req.cq_id = cq->cq_id;
849 oce_page_list(rq->ring->dbuf, fwcmd->params.req.pages,
850 rq->ring->dbuf->num_pages);
851
852 fwcmd->params.req.if_id = if_id;
853 fwcmd->params.req.max_frame_size = (uint16_t)rq->cfg.mtu;
854 fwcmd->params.req.is_rss_queue = rq->cfg.is_rss_queue;
855
856 /* fill rest of mbx */
857 mbx.u0.s.embedded = 1;
858 mbx.payload_length = sizeof (struct mbx_create_nic_rq);
859 DW_SWAP(u32ptr(&mbx), mbx.payload_length + OCE_BMBX_RHDR_SZ);
860
861 /* now post the command */
862 ret = oce_mbox_post(dev, &mbx, NULL);
863 if (ret != 0) {
864 oce_log(dev, CE_WARN, MOD_CONFIG,
865 "RQ create failed: %d", ret);
866 oce_cq_del(dev, cq);
867 return (ret);
868 }
869
870 /* interpret the response */
871 rq->rq_id = LE_16(fwcmd->params.rsp.u0.s.rq_id);
872 rq->rss_cpuid = fwcmd->params.rsp.u0.s.rss_cpuid;
873 rq->cfg.if_id = if_id;
874 rq->qstate = QCREATED;
875 rq->cq = cq;
876
877 /* set the Completion Handler */
878 rq->cq->cq_handler = oce_drain_rq_cq;
879 rq->cq->cb_arg = (void *)rq;
880 /* reset the indicies */
881 rq->ring->cidx = 0;
882 rq->ring->pidx = 0;
883 rq->buf_avail = 0;
884 oce_log(dev, CE_NOTE, MOD_CONFIG, "RQ created, RQID : %d", rq->rq_id);
885 return (0);
886
887 }
888
889 /*
890 * function to delete an RQ
891 *
892 * dev - software handle to the device
893 * rq - RQ to delete
894 *
895 * return none
896 */
897 static void
898 oce_rq_del(struct oce_dev *dev, struct oce_rq *rq)
899 {
900 struct oce_mbx mbx;
901 struct mbx_delete_nic_rq *fwcmd;
902
903 ASSERT(dev != NULL);
904 ASSERT(rq != NULL);
905
906 bzero(&mbx, sizeof (struct oce_mbx));
907
908 /* delete the Queue */
909 if (rq->qstate == QCREATED) {
910 fwcmd = (struct mbx_delete_nic_rq *)&mbx.payload;
911 fwcmd->params.req.rq_id = rq->rq_id;
912 (void) oce_destroy_q(dev, &mbx,
913 sizeof (struct mbx_delete_nic_rq), QTYPE_RQ);
914 rq->qstate = QDELETED;
915 oce_clean_rq(rq);
916 /* Delete the associated CQ */
917 oce_cq_del(dev, rq->cq);
918 rq->cq = NULL;
919 /* free up the posted buffers */
920 oce_rq_discharge(rq);
921 }
922 } /* oce_rq_del */
923
924 /*
925 * function to arm an EQ so that it can generate events
926 *
927 * dev - software handle to the device
928 * qid - id of the EQ returned by the fw at the time of creation
929 * npopped - number of EQEs to arm with
930 * rearm - rearm bit
931 * clearint - bit to clear the interrupt condition because of which
932 * EQEs are generated
933 *
934 * return none
935 */
936 void
937 oce_arm_eq(struct oce_dev *dev, int16_t qid, int npopped,
938 boolean_t rearm, boolean_t clearint)
939 {
940 eq_db_t eq_db = {0};
941
942 eq_db.bits.rearm = rearm;
943 eq_db.bits.event = B_TRUE;
944 eq_db.bits.num_popped = npopped;
945 eq_db.bits.clrint = clearint;
946 eq_db.bits.qid = qid;
947 OCE_DB_WRITE32(dev, PD_EQ_DB, eq_db.dw0);
948 }
949
950 /*
951 * function to arm a CQ with CQEs
952 *
953 * dev - software handle to the device
954 * qid - the id of the CQ returned by the fw at the time of creation
955 * npopped - number of CQEs to arm with
956 * rearm - rearm bit enable/disable
957 *
958 * return none
959 */
960 void
961 oce_arm_cq(struct oce_dev *dev, int16_t qid, int npopped,
962 boolean_t rearm)
963 {
964 cq_db_t cq_db = {0};
965 cq_db.bits.rearm = rearm;
966 cq_db.bits.num_popped = npopped;
967 cq_db.bits.event = 0;
968 cq_db.bits.qid = qid;
969 OCE_DB_WRITE32(dev, PD_CQ_DB, cq_db.dw0);
970 }
971
972
973 /*
974 * function to delete a EQ, CQ, MQ, WQ or RQ
975 *
976 * dev - sofware handle to the device
977 * mbx - mbox command to send to the fw to delete the queue
978 * mbx contains the queue information to delete
979 * req_size - the size of the mbx payload dependent on the qtype
980 * qtype - the type of queue i.e. EQ, CQ, MQ, WQ or RQ
981 *
982 * return DDI_SUCCESS => success, failure otherwise
983 */
984 int
985 oce_destroy_q(struct oce_dev *dev, struct oce_mbx *mbx, size_t req_size,
986 enum qtype qtype)
987 {
988 struct mbx_hdr *hdr = (struct mbx_hdr *)&mbx->payload;
989 int opcode;
990 int subsys;
991 int ret;
992
993 switch (qtype) {
994 case QTYPE_EQ: {
995 opcode = OPCODE_DESTROY_COMMON_EQ;
996 subsys = MBX_SUBSYSTEM_COMMON;
997 break;
998 }
999 case QTYPE_CQ: {
1000 opcode = OPCODE_DESTROY_COMMON_CQ;
1001 subsys = MBX_SUBSYSTEM_COMMON;
1002 break;
1003 }
1004 case QTYPE_MQ: {
1005 opcode = OPCODE_DESTROY_COMMON_MQ;
1006 subsys = MBX_SUBSYSTEM_COMMON;
1007 break;
1008 }
1009 case QTYPE_WQ: {
1010 opcode = OPCODE_DELETE_NIC_WQ;
1011 subsys = MBX_SUBSYSTEM_NIC;
1012 break;
1013 }
1014 case QTYPE_RQ: {
1015 opcode = OPCODE_DELETE_NIC_RQ;
1016 subsys = MBX_SUBSYSTEM_NIC;
1017 break;
1018 }
1019 default: {
1020 ASSERT(0);
1021 break;
1022 }
1023 }
1024
1025 mbx_common_req_hdr_init(hdr, 0, 0, subsys,
1026 opcode, MBX_TIMEOUT_SEC, req_size);
1027
1028 /* fill rest of mbx */
1029 mbx->u0.s.embedded = 1;
1030 mbx->payload_length = (uint32_t)req_size;
1031 DW_SWAP(u32ptr(mbx), mbx->payload_length + OCE_BMBX_RHDR_SZ);
1032
1033 /* send command */
1034 ret = oce_mbox_post(dev, mbx, NULL);
1035
1036 if (ret != 0) {
1037 oce_log(dev, CE_WARN, MOD_CONFIG, "%s",
1038 "Failed to del q ");
1039 }
1040 return (ret);
1041 }
1042
1043 /*
1044 * function to set the delay parameter in the EQ for interrupt coalescing
1045 *
1046 * dev - software handle to the device
1047 * eq_arr - array of EQ ids to delete
1048 * eq_cnt - number of elements in eq_arr
1049 * eq_delay - delay parameter
1050 *
1051 * return DDI_SUCCESS => success, failure otherwise
1052 */
1053 int
1054 oce_set_eq_delay(struct oce_dev *dev, uint32_t *eq_arr,
1055 uint32_t eq_cnt, uint32_t eq_delay)
1056 {
1057 struct oce_mbx mbx;
1058 struct mbx_modify_common_eq_delay *fwcmd;
1059 int ret;
1060 int neq;
1061
1062 bzero(&mbx, sizeof (struct oce_mbx));
1063 fwcmd = (struct mbx_modify_common_eq_delay *)&mbx.payload;
1064
1065 /* fill the command */
1066 fwcmd->params.req.num_eq = eq_cnt;
1067 for (neq = 0; neq < eq_cnt; neq++) {
1068 fwcmd->params.req.delay[neq].eq_id = eq_arr[neq];
1069 fwcmd->params.req.delay[neq].phase = 0;
1070 fwcmd->params.req.delay[neq].dm = eq_delay;
1071
1072 }
1073
1074 /* initialize the ioctl header */
1075 mbx_common_req_hdr_init(&fwcmd->hdr, 0, 0,
1076 MBX_SUBSYSTEM_COMMON,
1077 OPCODE_MODIFY_COMMON_EQ_DELAY,
1078 MBX_TIMEOUT_SEC,
1079 sizeof (struct mbx_modify_common_eq_delay));
1080
1081 /* fill rest of mbx */
1082 mbx.u0.s.embedded = 1;
1083 mbx.payload_length = sizeof (struct mbx_modify_common_eq_delay);
1084 DW_SWAP(u32ptr(&mbx), mbx.payload_length + OCE_BMBX_RHDR_SZ);
1085
1086 /* post the command */
1087 ret = oce_mbox_post(dev, &mbx, NULL);
1088 if (ret != 0) {
1089 oce_log(dev, CE_WARN, MOD_CONFIG,
1090 "Failed to set EQ delay %d", ret);
1091 }
1092
1093 return (ret);
1094 } /* oce_set_eq_delay */
1095
1096 /*
1097 * function to cleanup the eqs used during stop
1098 *
1099 * eq - pointer to event queue structure
1100 *
1101 * return none
1102 */
1103 void
1104 oce_drain_eq(struct oce_eq *eq)
1105 {
1106 struct oce_eqe *eqe;
1107 uint16_t num_eqe = 0;
1108 struct oce_dev *dev;
1109
1110 dev = eq->parent;
1111 /* get the first item in eq to process */
1112 eqe = RING_GET_CONSUMER_ITEM_VA(eq->ring, struct oce_eqe);
1113
1114 while (eqe->u0.dw0) {
1115 eqe->u0.dw0 = LE_32(eqe->u0.dw0);
1116
1117 /* clear valid bit */
1118 eqe->u0.dw0 = 0;
1119
1120 /* process next eqe */
1121 RING_GET(eq->ring, 1);
1122
1123 eqe = RING_GET_CONSUMER_ITEM_VA(eq->ring, struct oce_eqe);
1124 num_eqe++;
1125 } /* for all EQEs */
1126 if (num_eqe) {
1127 oce_arm_eq(dev, eq->eq_id, num_eqe, B_FALSE, B_TRUE);
1128 }
1129 } /* oce_drain_eq */
1130
1131
1132 int
1133 oce_init_txrx(struct oce_dev *dev)
1134 {
1135 int qid = 0;
1136
1137 /* enable RSS if rx queues > 1 */
1138 dev->rss_enable = (dev->rx_rings > 1) ? B_TRUE : B_FALSE;
1139
1140 for (qid = 0; qid < dev->tx_rings; qid++) {
1141 dev->wq[qid] = oce_wq_init(dev, dev->tx_ring_size,
1142 NIC_WQ_TYPE_STANDARD);
1143 if (dev->wq[qid] == NULL) {
1144 goto queue_fail;
1145 }
1146 }
1147
1148 /* Now create the Rx Queues */
1149 /* qid 0 is always default non rss queue for rss */
1150 dev->rq[0] = oce_rq_init(dev, dev->rx_ring_size, dev->rq_frag_size,
1151 OCE_MAX_JUMBO_FRAME_SIZE, B_FALSE);
1152 if (dev->rq[0] == NULL) {
1153 goto queue_fail;
1154 }
1155
1156 for (qid = 1; qid < dev->rx_rings; qid++) {
1157 dev->rq[qid] = oce_rq_init(dev, dev->rx_ring_size,
1158 dev->rq_frag_size, OCE_MAX_JUMBO_FRAME_SIZE,
1159 dev->rss_enable);
1160 if (dev->rq[qid] == NULL) {
1161 goto queue_fail;
1162 }
1163 }
1164
1165 return (DDI_SUCCESS);
1166 queue_fail:
1167 oce_fini_txrx(dev);
1168 return (DDI_FAILURE);
1169 }
1170 void
1171 oce_fini_txrx(struct oce_dev *dev)
1172 {
1173 int qid;
1174 int nqs;
1175
1176 /* free all the tx rings */
1177 /* nwqs is decremented in fini so copy count first */
1178 nqs = dev->nwqs;
1179 for (qid = 0; qid < nqs; qid++) {
1180 if (dev->wq[qid] != NULL) {
1181 oce_wq_fini(dev, dev->wq[qid]);
1182 dev->wq[qid] = NULL;
1183 }
1184 }
1185 /* free all the rx rings */
1186 nqs = dev->nrqs;
1187 for (qid = 0; qid < nqs; qid++) {
1188 if (dev->rq[qid] != NULL) {
1189 oce_rq_fini(dev, dev->rq[qid]);
1190 dev->rq[qid] = NULL;
1191 }
1192 }
1193 }
1194
1195 int
1196 oce_create_queues(struct oce_dev *dev)
1197 {
1198
1199 int i;
1200 struct oce_eq *eq;
1201 struct oce_mq *mq;
1202
1203 for (i = 0; i < dev->num_vectors; i++) {
1204 eq = oce_eq_create(dev, EQ_LEN_1024, EQE_SIZE_4, 0);
1205 if (eq == NULL) {
1206 goto rings_fail;
1207 }
1208 dev->eq[i] = eq;
1209 }
1210 for (i = 0; i < dev->nwqs; i++) {
1211 if (oce_wq_create(dev->wq[i], dev->eq[0]) != 0)
1212 goto rings_fail;
1213 }
1214
1215 for (i = 0; i < dev->nrqs; i++) {
1216 if (oce_rq_create(dev->rq[i], dev->if_id,
1217 dev->neqs > 1 ? dev->eq[1 + i] : dev->eq[0]) != 0)
1218 goto rings_fail;
1219 }
1220 mq = oce_mq_create(dev, dev->eq[0], 64);
1221 if (mq == NULL)
1222 goto rings_fail;
1223 dev->mq = mq;
1224 return (DDI_SUCCESS);
1225 rings_fail:
1226 oce_delete_queues(dev);
1227 return (DDI_FAILURE);
1228
1229 }
1230
1231 void
1232 oce_delete_queues(struct oce_dev *dev)
1233 {
1234 int i;
1235 int neqs = dev->neqs;
1236 if (dev->mq != NULL) {
1237 oce_mq_del(dev, dev->mq);
1238 dev->mq = NULL;
1239 }
1240
1241 for (i = 0; i < dev->nrqs; i++) {
1242 oce_rq_del(dev, dev->rq[i]);
1243 }
1244 for (i = 0; i < dev->nwqs; i++) {
1245 oce_wq_del(dev, dev->wq[i]);
1246 }
1247 /* delete as many eqs as the number of vectors */
1248 for (i = 0; i < neqs; i++) {
1249 oce_eq_del(dev, dev->eq[i]);
1250 dev->eq[i] = NULL;
1251 }
1252 }
1253
1254 void
1255 oce_dev_rss_ready(struct oce_dev *dev)
1256 {
1257 uint8_t dev_index = 0;
1258 uint8_t adapter_rss = 0;
1259
1260 /* Return if rx_rings <= 1 (No RSS) */
1261 if (dev->rx_rings <= 1) {
1262 oce_log(dev, CE_NOTE, MOD_CONFIG,
1263 "Rx rings = %d, Not enabling RSS", dev->rx_rings);
1264 return;
1265 }
1266
1267 /*
1268 * Count the number of PCI functions enabling RSS on this
1269 * adapter
1270 */
1271 while (dev_index < MAX_DEVS) {
1272 if ((oce_dev_list[dev_index] != NULL) &&
1273 (dev->pci_bus == oce_dev_list[dev_index]->pci_bus) &&
1274 (dev->pci_device == oce_dev_list[dev_index]->pci_device) &&
1275 (oce_dev_list[dev_index]->rss_enable)) {
1276 adapter_rss++;
1277 }
1278 dev_index++;
1279 }
1280
1281 /*
1282 * If there are already MAX_RSS_PER_ADAPTER PCI functions using
1283 * RSS on this adapter, reduce the number of rx rings to 1
1284 * (No RSS)
1285 */
1286 if (adapter_rss >= MAX_RSS_PER_ADAPTER) {
1287 dev->rx_rings = 1;
1288 }
1289 }