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vmbus: replace modulus operation with subtraction
[linux-2.6/btrfs-unstable.git] / drivers / scsi / qla2xxx / qla_mid.c
blobc6d6f0d912ff75ffaf9b9d810f81af735e39549b
1 /*
2 * QLogic Fibre Channel HBA Driver
3 * Copyright (c) 2003-2014 QLogic Corporation
4 *
5 * See LICENSE.qla2xxx for copyright and licensing details.
6 */
7 #include "qla_def.h"
8 #include "qla_gbl.h"
9 #include "qla_target.h"
10
11 #include <linux/moduleparam.h>
12 #include <linux/vmalloc.h>
13 #include <linux/slab.h>
14 #include <linux/list.h>
15
16 #include <scsi/scsi_tcq.h>
17 #include <scsi/scsicam.h>
18 #include <linux/delay.h>
19
20 void
21 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
22 {
23 if (vha->vp_idx && vha->timer_active) {
24 del_timer_sync(&vha->timer);
25 vha->timer_active = 0;
26 }
27 }
28
29 static uint32_t
30 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
31 {
32 uint32_t vp_id;
33 struct qla_hw_data *ha = vha->hw;
34 unsigned long flags;
35
36 /* Find an empty slot and assign an vp_id */
37 mutex_lock(&ha->vport_lock);
38 vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
39 if (vp_id > ha->max_npiv_vports) {
40 ql_dbg(ql_dbg_vport, vha, 0xa000,
41 "vp_id %d is bigger than max-supported %d.\n",
42 vp_id, ha->max_npiv_vports);
43 mutex_unlock(&ha->vport_lock);
44 return vp_id;
45 }
46
47 set_bit(vp_id, ha->vp_idx_map);
48 ha->num_vhosts++;
49 vha->vp_idx = vp_id;
50
51 spin_lock_irqsave(&ha->vport_slock, flags);
52 list_add_tail(&vha->list, &ha->vp_list);
53
54 qlt_update_vp_map(vha, SET_VP_IDX);
55
56 spin_unlock_irqrestore(&ha->vport_slock, flags);
57
58 mutex_unlock(&ha->vport_lock);
59 return vp_id;
60 }
61
62 void
63 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
64 {
65 uint16_t vp_id;
66 struct qla_hw_data *ha = vha->hw;
67 unsigned long flags = 0;
68
69 mutex_lock(&ha->vport_lock);
70 /*
71 * Wait for all pending activities to finish before removing vport from
72 * the list.
73 * Lock needs to be held for safe removal from the list (it
74 * ensures no active vp_list traversal while the vport is removed
75 * from the queue)
76 */
77 spin_lock_irqsave(&ha->vport_slock, flags);
78 while (atomic_read(&vha->vref_count)) {
79 spin_unlock_irqrestore(&ha->vport_slock, flags);
80
81 msleep(500);
82
83 spin_lock_irqsave(&ha->vport_slock, flags);
84 }
85 list_del(&vha->list);
86 qlt_update_vp_map(vha, RESET_VP_IDX);
87 spin_unlock_irqrestore(&ha->vport_slock, flags);
88
89 vp_id = vha->vp_idx;
90 ha->num_vhosts--;
91 clear_bit(vp_id, ha->vp_idx_map);
92
93 mutex_unlock(&ha->vport_lock);
94 }
95
96 static scsi_qla_host_t *
97 qla24xx_find_vhost_by_name(struct qla_hw_data *ha, uint8_t *port_name)
98 {
99 scsi_qla_host_t *vha;
100 struct scsi_qla_host *tvha;
101 unsigned long flags;
102
103 spin_lock_irqsave(&ha->vport_slock, flags);
104 /* Locate matching device in database. */
105 list_for_each_entry_safe(vha, tvha, &ha->vp_list, list) {
106 if (!memcmp(port_name, vha->port_name, WWN_SIZE)) {
107 spin_unlock_irqrestore(&ha->vport_slock, flags);
108 return vha;
109 }
110 }
111 spin_unlock_irqrestore(&ha->vport_slock, flags);
112 return NULL;
113 }
114
115 /*
116 * qla2x00_mark_vp_devices_dead
117 * Updates fcport state when device goes offline.
118 *
119 * Input:
120 * ha = adapter block pointer.
121 * fcport = port structure pointer.
122 *
123 * Return:
124 * None.
125 *
126 * Context:
127 */
128 static void
129 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
130 {
131 /*
132 * !!! NOTE !!!
133 * This function, if called in contexts other than vp create, disable
134 * or delete, please make sure this is synchronized with the
135 * delete thread.
136 */
137 fc_port_t *fcport;
138
139 list_for_each_entry(fcport, &vha->vp_fcports, list) {
140 ql_dbg(ql_dbg_vport, vha, 0xa001,
141 "Marking port dead, loop_id=0x%04x : %x.\n",
142 fcport->loop_id, fcport->vha->vp_idx);
143
144 qla2x00_mark_device_lost(vha, fcport, 0, 0);
145 qla2x00_set_fcport_state(fcport, FCS_UNCONFIGURED);
146 }
147 }
148
149 int
150 qla24xx_disable_vp(scsi_qla_host_t *vha)
151 {
152 unsigned long flags;
153 int ret;
154
155 ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
156 atomic_set(&vha->loop_state, LOOP_DOWN);
157 atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
158
159 /* Remove port id from vp target map */
160 spin_lock_irqsave(&vha->hw->vport_slock, flags);
161 qlt_update_vp_map(vha, RESET_AL_PA);
162 spin_unlock_irqrestore(&vha->hw->vport_slock, flags);
163
164 qla2x00_mark_vp_devices_dead(vha);
165 atomic_set(&vha->vp_state, VP_FAILED);
166 vha->flags.management_server_logged_in = 0;
167 if (ret == QLA_SUCCESS) {
168 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
169 } else {
170 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
171 return -1;
172 }
173 return 0;
174 }
175
176 int
177 qla24xx_enable_vp(scsi_qla_host_t *vha)
178 {
179 int ret;
180 struct qla_hw_data *ha = vha->hw;
181 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
182
183 /* Check if physical ha port is Up */
184 if (atomic_read(&base_vha->loop_state) == LOOP_DOWN ||
185 atomic_read(&base_vha->loop_state) == LOOP_DEAD ||
186 !(ha->current_topology & ISP_CFG_F)) {
187 vha->vp_err_state = VP_ERR_PORTDWN;
188 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
189 goto enable_failed;
190 }
191
192 /* Initialize the new vport unless it is a persistent port */
193 mutex_lock(&ha->vport_lock);
194 ret = qla24xx_modify_vp_config(vha);
195 mutex_unlock(&ha->vport_lock);
196
197 if (ret != QLA_SUCCESS) {
198 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
199 goto enable_failed;
200 }
201
202 ql_dbg(ql_dbg_taskm, vha, 0x801a,
203 "Virtual port with id: %d - Enabled.\n", vha->vp_idx);
204 return 0;
205
206 enable_failed:
207 ql_dbg(ql_dbg_taskm, vha, 0x801b,
208 "Virtual port with id: %d - Disabled.\n", vha->vp_idx);
209 return 1;
210 }
211
212 static void
213 qla24xx_configure_vp(scsi_qla_host_t *vha)
214 {
215 struct fc_vport *fc_vport;
216 int ret;
217
218 fc_vport = vha->fc_vport;
219
220 ql_dbg(ql_dbg_vport, vha, 0xa002,
221 "%s: change request #3.\n", __func__);
222 ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
223 if (ret != QLA_SUCCESS) {
224 ql_dbg(ql_dbg_vport, vha, 0xa003, "Failed to enable "
225 "receiving of RSCN requests: 0x%x.\n", ret);
226 return;
227 } else {
228 /* Corresponds to SCR enabled */
229 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
230 }
231
232 vha->flags.online = 1;
233 if (qla24xx_configure_vhba(vha))
234 return;
235
236 atomic_set(&vha->vp_state, VP_ACTIVE);
237 fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
238 }
239
240 void
241 qla2x00_alert_all_vps(struct rsp_que *rsp, uint16_t *mb)
242 {
243 scsi_qla_host_t *vha;
244 struct qla_hw_data *ha = rsp->hw;
245 int i = 0;
246 unsigned long flags;
247
248 spin_lock_irqsave(&ha->vport_slock, flags);
249 list_for_each_entry(vha, &ha->vp_list, list) {
250 if (vha->vp_idx) {
251 atomic_inc(&vha->vref_count);
252 spin_unlock_irqrestore(&ha->vport_slock, flags);
253
254 switch (mb[0]) {
255 case MBA_LIP_OCCURRED:
256 case MBA_LOOP_UP:
257 case MBA_LOOP_DOWN:
258 case MBA_LIP_RESET:
259 case MBA_POINT_TO_POINT:
260 case MBA_CHG_IN_CONNECTION:
261 case MBA_PORT_UPDATE:
262 case MBA_RSCN_UPDATE:
263 ql_dbg(ql_dbg_async, vha, 0x5024,
264 "Async_event for VP[%d], mb=0x%x vha=%p.\n",
265 i, *mb, vha);
266 qla2x00_async_event(vha, rsp, mb);
267 break;
268 }
269
270 spin_lock_irqsave(&ha->vport_slock, flags);
271 atomic_dec(&vha->vref_count);
272 }
273 i++;
274 }
275 spin_unlock_irqrestore(&ha->vport_slock, flags);
276 }
277
278 int
279 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
280 {
281 /*
282 * Physical port will do most of the abort and recovery work. We can
283 * just treat it as a loop down
284 */
285 if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
286 atomic_set(&vha->loop_state, LOOP_DOWN);
287 qla2x00_mark_all_devices_lost(vha, 0);
288 } else {
289 if (!atomic_read(&vha->loop_down_timer))
290 atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
291 }
292
293 /*
294 * To exclusively reset vport, we need to log it out first. Note: this
295 * control_vp can fail if ISP reset is already issued, this is
296 * expected, as the vp would be already logged out due to ISP reset.
297 */
298 if (!test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
299 qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
300
301 ql_dbg(ql_dbg_taskm, vha, 0x801d,
302 "Scheduling enable of Vport %d.\n", vha->vp_idx);
303 return qla24xx_enable_vp(vha);
304 }
305
306 static int
307 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
308 {
309 struct qla_hw_data *ha = vha->hw;
310 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
311
312 ql_dbg(ql_dbg_dpc + ql_dbg_verbose, vha, 0x4012,
313 "Entering %s vp_flags: 0x%lx.\n", __func__, vha->vp_flags);
314
315 qla2x00_do_work(vha);
316
317 /* Check if Fw is ready to configure VP first */
318 if (test_bit(VP_CONFIG_OK, &base_vha->vp_flags)) {
319 if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
320 /* VP acquired. complete port configuration */
321 ql_dbg(ql_dbg_dpc, vha, 0x4014,
322 "Configure VP scheduled.\n");
323 qla24xx_configure_vp(vha);
324 ql_dbg(ql_dbg_dpc, vha, 0x4015,
325 "Configure VP end.\n");
326 return 0;
327 }
328 }
329
330 if (test_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags)) {
331 ql_dbg(ql_dbg_dpc, vha, 0x4016,
332 "FCPort update scheduled.\n");
333 qla2x00_update_fcports(vha);
334 clear_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags);
335 ql_dbg(ql_dbg_dpc, vha, 0x4017,
336 "FCPort update end.\n");
337 }
338
339 if ((test_and_clear_bit(RELOGIN_NEEDED, &vha->dpc_flags)) &&
340 !test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) &&
341 atomic_read(&vha->loop_state) != LOOP_DOWN) {
342
343 ql_dbg(ql_dbg_dpc, vha, 0x4018,
344 "Relogin needed scheduled.\n");
345 qla2x00_relogin(vha);
346 ql_dbg(ql_dbg_dpc, vha, 0x4019,
347 "Relogin needed end.\n");
348 }
349
350 if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
351 (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
352 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
353 }
354
355 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
356 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
357 ql_dbg(ql_dbg_dpc, vha, 0x401a,
358 "Loop resync scheduled.\n");
359 qla2x00_loop_resync(vha);
360 clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
361 ql_dbg(ql_dbg_dpc, vha, 0x401b,
362 "Loop resync end.\n");
363 }
364 }
365
366 ql_dbg(ql_dbg_dpc + ql_dbg_verbose, vha, 0x401c,
367 "Exiting %s.\n", __func__);
368 return 0;
369 }
370
371 void
372 qla2x00_do_dpc_all_vps(scsi_qla_host_t *vha)
373 {
374 struct qla_hw_data *ha = vha->hw;
375 scsi_qla_host_t *vp;
376 unsigned long flags = 0;
377
378 if (vha->vp_idx)
379 return;
380 if (list_empty(&ha->vp_list))
381 return;
382
383 clear_bit(VP_DPC_NEEDED, &vha->dpc_flags);
384
385 if (!(ha->current_topology & ISP_CFG_F))
386 return;
387
388 spin_lock_irqsave(&ha->vport_slock, flags);
389 list_for_each_entry(vp, &ha->vp_list, list) {
390 if (vp->vp_idx) {
391 atomic_inc(&vp->vref_count);
392 spin_unlock_irqrestore(&ha->vport_slock, flags);
393
394 qla2x00_do_dpc_vp(vp);
395
396 spin_lock_irqsave(&ha->vport_slock, flags);
397 atomic_dec(&vp->vref_count);
398 }
399 }
400 spin_unlock_irqrestore(&ha->vport_slock, flags);
401 }
402
403 int
404 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
405 {
406 scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
407 struct qla_hw_data *ha = base_vha->hw;
408 scsi_qla_host_t *vha;
409 uint8_t port_name[WWN_SIZE];
410
411 if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
412 return VPCERR_UNSUPPORTED;
413
414 /* Check up the F/W and H/W support NPIV */
415 if (!ha->flags.npiv_supported)
416 return VPCERR_UNSUPPORTED;
417
418 /* Check up whether npiv supported switch presented */
419 if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
420 return VPCERR_NO_FABRIC_SUPP;
421
422 /* Check up unique WWPN */
423 u64_to_wwn(fc_vport->port_name, port_name);
424 if (!memcmp(port_name, base_vha->port_name, WWN_SIZE))
425 return VPCERR_BAD_WWN;
426 vha = qla24xx_find_vhost_by_name(ha, port_name);
427 if (vha)
428 return VPCERR_BAD_WWN;
429
430 /* Check up max-npiv-supports */
431 if (ha->num_vhosts > ha->max_npiv_vports) {
432 ql_dbg(ql_dbg_vport, vha, 0xa004,
433 "num_vhosts %ud is bigger "
434 "than max_npiv_vports %ud.\n",
435 ha->num_vhosts, ha->max_npiv_vports);
436 return VPCERR_UNSUPPORTED;
437 }
438 return 0;
439 }
440
441 scsi_qla_host_t *
442 qla24xx_create_vhost(struct fc_vport *fc_vport)
443 {
444 scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
445 struct qla_hw_data *ha = base_vha->hw;
446 scsi_qla_host_t *vha;
447 struct scsi_host_template *sht = &qla2xxx_driver_template;
448 struct Scsi_Host *host;
449
450 vha = qla2x00_create_host(sht, ha);
451 if (!vha) {
452 ql_log(ql_log_warn, vha, 0xa005,
453 "scsi_host_alloc() failed for vport.\n");
454 return(NULL);
455 }
456
457 host = vha->host;
458 fc_vport->dd_data = vha;
459 /* New host info */
460 u64_to_wwn(fc_vport->node_name, vha->node_name);
461 u64_to_wwn(fc_vport->port_name, vha->port_name);
462
463 vha->fc_vport = fc_vport;
464 vha->device_flags = 0;
465 vha->vp_idx = qla24xx_allocate_vp_id(vha);
466 if (vha->vp_idx > ha->max_npiv_vports) {
467 ql_dbg(ql_dbg_vport, vha, 0xa006,
468 "Couldn't allocate vp_id.\n");
469 goto create_vhost_failed;
470 }
471 vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
472
473 vha->dpc_flags = 0L;
474
475 /*
476 * To fix the issue of processing a parent's RSCN for the vport before
477 * its SCR is complete.
478 */
479 set_bit(VP_SCR_NEEDED, &vha->vp_flags);
480 atomic_set(&vha->loop_state, LOOP_DOWN);
481 atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
482
483 qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
484
485 vha->req = base_vha->req;
486 host->can_queue = base_vha->req->length + 128;
487 host->cmd_per_lun = 3;
488 if (IS_T10_PI_CAPABLE(ha) && ql2xenabledif)
489 host->max_cmd_len = 32;
490 else
491 host->max_cmd_len = MAX_CMDSZ;
492 host->max_channel = MAX_BUSES - 1;
493 host->max_lun = ql2xmaxlun;
494 host->unique_id = host->host_no;
495 host->max_id = ha->max_fibre_devices;
496 host->transportt = qla2xxx_transport_vport_template;
497
498 ql_dbg(ql_dbg_vport, vha, 0xa007,
499 "Detect vport hba %ld at address = %p.\n",
500 vha->host_no, vha);
501
502 vha->flags.init_done = 1;
503
504 mutex_lock(&ha->vport_lock);
505 set_bit(vha->vp_idx, ha->vp_idx_map);
506 ha->cur_vport_count++;
507 mutex_unlock(&ha->vport_lock);
508
509 return vha;
510
511 create_vhost_failed:
512 return NULL;
513 }
514
515 static void
516 qla25xx_free_req_que(struct scsi_qla_host *vha, struct req_que *req)
517 {
518 struct qla_hw_data *ha = vha->hw;
519 uint16_t que_id = req->id;
520
521 dma_free_coherent(&ha->pdev->dev, (req->length + 1) *
522 sizeof(request_t), req->ring, req->dma);
523 req->ring = NULL;
524 req->dma = 0;
525 if (que_id) {
526 ha->req_q_map[que_id] = NULL;
527 mutex_lock(&ha->vport_lock);
528 clear_bit(que_id, ha->req_qid_map);
529 mutex_unlock(&ha->vport_lock);
530 }
531 kfree(req->outstanding_cmds);
532 kfree(req);
533 req = NULL;
534 }
535
536 static void
537 qla25xx_free_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
538 {
539 struct qla_hw_data *ha = vha->hw;
540 uint16_t que_id = rsp->id;
541
542 if (rsp->msix && rsp->msix->have_irq) {
543 free_irq(rsp->msix->vector, rsp->msix->handle);
544 rsp->msix->have_irq = 0;
545 rsp->msix->in_use = 0;
546 rsp->msix->handle = NULL;
547 }
548 dma_free_coherent(&ha->pdev->dev, (rsp->length + 1) *
549 sizeof(response_t), rsp->ring, rsp->dma);
550 rsp->ring = NULL;
551 rsp->dma = 0;
552 if (que_id) {
553 ha->rsp_q_map[que_id] = NULL;
554 mutex_lock(&ha->vport_lock);
555 clear_bit(que_id, ha->rsp_qid_map);
556 mutex_unlock(&ha->vport_lock);
557 }
558 kfree(rsp);
559 rsp = NULL;
560 }
561
562 int
563 qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
564 {
565 int ret = -1;
566
567 if (req) {
568 req->options |= BIT_0;
569 ret = qla25xx_init_req_que(vha, req);
570 }
571 if (ret == QLA_SUCCESS)
572 qla25xx_free_req_que(vha, req);
573
574 return ret;
575 }
576
577 int
578 qla25xx_delete_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
579 {
580 int ret = -1;
581
582 if (rsp) {
583 rsp->options |= BIT_0;
584 ret = qla25xx_init_rsp_que(vha, rsp);
585 }
586 if (ret == QLA_SUCCESS)
587 qla25xx_free_rsp_que(vha, rsp);
588
589 return ret;
590 }
591
592 /* Delete all queues for a given vhost */
593 int
594 qla25xx_delete_queues(struct scsi_qla_host *vha)
595 {
596 int cnt, ret = 0;
597 struct req_que *req = NULL;
598 struct rsp_que *rsp = NULL;
599 struct qla_hw_data *ha = vha->hw;
600 struct qla_qpair *qpair, *tqpair;
601
602 if (ql2xmqsupport) {
603 list_for_each_entry_safe(qpair, tqpair, &vha->qp_list,
604 qp_list_elem)
605 qla2xxx_delete_qpair(vha, qpair);
606 } else {
607 /* Delete request queues */
608 for (cnt = 1; cnt < ha->max_req_queues; cnt++) {
609 req = ha->req_q_map[cnt];
610 if (req && test_bit(cnt, ha->req_qid_map)) {
611 ret = qla25xx_delete_req_que(vha, req);
612 if (ret != QLA_SUCCESS) {
613 ql_log(ql_log_warn, vha, 0x00ea,
614 "Couldn't delete req que %d.\n",
615 req->id);
616 return ret;
617 }
618 }
619 }
620
621 /* Delete response queues */
622 for (cnt = 1; cnt < ha->max_rsp_queues; cnt++) {
623 rsp = ha->rsp_q_map[cnt];
624 if (rsp && test_bit(cnt, ha->rsp_qid_map)) {
625 ret = qla25xx_delete_rsp_que(vha, rsp);
626 if (ret != QLA_SUCCESS) {
627 ql_log(ql_log_warn, vha, 0x00eb,
628 "Couldn't delete rsp que %d.\n",
629 rsp->id);
630 return ret;
631 }
632 }
633 }
634 }
635
636 return ret;
637 }
638
639 int
640 qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
641 uint8_t vp_idx, uint16_t rid, int rsp_que, uint8_t qos)
642 {
643 int ret = 0;
644 struct req_que *req = NULL;
645 struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
646 uint16_t que_id = 0;
647 device_reg_t *reg;
648 uint32_t cnt;
649
650 req = kzalloc(sizeof(struct req_que), GFP_KERNEL);
651 if (req == NULL) {
652 ql_log(ql_log_fatal, base_vha, 0x00d9,
653 "Failed to allocate memory for request queue.\n");
654 goto failed;
655 }
656
657 req->length = REQUEST_ENTRY_CNT_24XX;
658 req->ring = dma_alloc_coherent(&ha->pdev->dev,
659 (req->length + 1) * sizeof(request_t),
660 &req->dma, GFP_KERNEL);
661 if (req->ring == NULL) {
662 ql_log(ql_log_fatal, base_vha, 0x00da,
663 "Failed to allocate memory for request_ring.\n");
664 goto que_failed;
665 }
666
667 ret = qla2x00_alloc_outstanding_cmds(ha, req);
668 if (ret != QLA_SUCCESS)
669 goto que_failed;
670
671 mutex_lock(&ha->mq_lock);
672 que_id = find_first_zero_bit(ha->req_qid_map, ha->max_req_queues);
673 if (que_id >= ha->max_req_queues) {
674 mutex_unlock(&ha->mq_lock);
675 ql_log(ql_log_warn, base_vha, 0x00db,
676 "No resources to create additional request queue.\n");
677 goto que_failed;
678 }
679 set_bit(que_id, ha->req_qid_map);
680 ha->req_q_map[que_id] = req;
681 req->rid = rid;
682 req->vp_idx = vp_idx;
683 req->qos = qos;
684
685 ql_dbg(ql_dbg_multiq, base_vha, 0xc002,
686 "queue_id=%d rid=%d vp_idx=%d qos=%d.\n",
687 que_id, req->rid, req->vp_idx, req->qos);
688 ql_dbg(ql_dbg_init, base_vha, 0x00dc,
689 "queue_id=%d rid=%d vp_idx=%d qos=%d.\n",
690 que_id, req->rid, req->vp_idx, req->qos);
691 if (rsp_que < 0)
692 req->rsp = NULL;
693 else
694 req->rsp = ha->rsp_q_map[rsp_que];
695 /* Use alternate PCI bus number */
696 if (MSB(req->rid))
697 options |= BIT_4;
698 /* Use alternate PCI devfn */
699 if (LSB(req->rid))
700 options |= BIT_5;
701 req->options = options;
702
703 ql_dbg(ql_dbg_multiq, base_vha, 0xc003,
704 "options=0x%x.\n", req->options);
705 ql_dbg(ql_dbg_init, base_vha, 0x00dd,
706 "options=0x%x.\n", req->options);
707 for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++)
708 req->outstanding_cmds[cnt] = NULL;
709 req->current_outstanding_cmd = 1;
710
711 req->ring_ptr = req->ring;
712 req->ring_index = 0;
713 req->cnt = req->length;
714 req->id = que_id;
715 reg = ISP_QUE_REG(ha, que_id);
716 req->req_q_in = &reg->isp25mq.req_q_in;
717 req->req_q_out = &reg->isp25mq.req_q_out;
718 req->max_q_depth = ha->req_q_map[0]->max_q_depth;
719 req->out_ptr = (void *)(req->ring + req->length);
720 mutex_unlock(&ha->mq_lock);
721 ql_dbg(ql_dbg_multiq, base_vha, 0xc004,
722 "ring_ptr=%p ring_index=%d, "
723 "cnt=%d id=%d max_q_depth=%d.\n",
724 req->ring_ptr, req->ring_index,
725 req->cnt, req->id, req->max_q_depth);
726 ql_dbg(ql_dbg_init, base_vha, 0x00de,
727 "ring_ptr=%p ring_index=%d, "
728 "cnt=%d id=%d max_q_depth=%d.\n",
729 req->ring_ptr, req->ring_index, req->cnt,
730 req->id, req->max_q_depth);
731
732 ret = qla25xx_init_req_que(base_vha, req);
733 if (ret != QLA_SUCCESS) {
734 ql_log(ql_log_fatal, base_vha, 0x00df,
735 "%s failed.\n", __func__);
736 mutex_lock(&ha->mq_lock);
737 clear_bit(que_id, ha->req_qid_map);
738 mutex_unlock(&ha->mq_lock);
739 goto que_failed;
740 }
741
742 return req->id;
743
744 que_failed:
745 qla25xx_free_req_que(base_vha, req);
746 failed:
747 return 0;
748 }
749
750 static void qla_do_work(struct work_struct *work)
751 {
752 unsigned long flags;
753 struct qla_qpair *qpair = container_of(work, struct qla_qpair, q_work);
754 struct scsi_qla_host *vha;
755 struct qla_hw_data *ha = qpair->hw;
756
757 spin_lock_irqsave(&qpair->qp_lock, flags);
758 vha = pci_get_drvdata(ha->pdev);
759 qla24xx_process_response_queue(vha, qpair->rsp);
760 spin_unlock_irqrestore(&qpair->qp_lock, flags);
761 }
762
763 /* create response queue */
764 int
765 qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
766 uint8_t vp_idx, uint16_t rid, struct qla_qpair *qpair)
767 {
768 int ret = 0;
769 struct rsp_que *rsp = NULL;
770 struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
771 uint16_t que_id = 0;
772 device_reg_t *reg;
773
774 rsp = kzalloc(sizeof(struct rsp_que), GFP_KERNEL);
775 if (rsp == NULL) {
776 ql_log(ql_log_warn, base_vha, 0x0066,
777 "Failed to allocate memory for response queue.\n");
778 goto failed;
779 }
780
781 rsp->length = RESPONSE_ENTRY_CNT_MQ;
782 rsp->ring = dma_alloc_coherent(&ha->pdev->dev,
783 (rsp->length + 1) * sizeof(response_t),
784 &rsp->dma, GFP_KERNEL);
785 if (rsp->ring == NULL) {
786 ql_log(ql_log_warn, base_vha, 0x00e1,
787 "Failed to allocate memory for response ring.\n");
788 goto que_failed;
789 }
790
791 mutex_lock(&ha->mq_lock);
792 que_id = find_first_zero_bit(ha->rsp_qid_map, ha->max_rsp_queues);
793 if (que_id >= ha->max_rsp_queues) {
794 mutex_unlock(&ha->mq_lock);
795 ql_log(ql_log_warn, base_vha, 0x00e2,
796 "No resources to create additional request queue.\n");
797 goto que_failed;
798 }
799 set_bit(que_id, ha->rsp_qid_map);
800
801 rsp->msix = qpair->msix;
802
803 ha->rsp_q_map[que_id] = rsp;
804 rsp->rid = rid;
805 rsp->vp_idx = vp_idx;
806 rsp->hw = ha;
807 ql_dbg(ql_dbg_init, base_vha, 0x00e4,
808 "rsp queue_id=%d rid=%d vp_idx=%d hw=%p.\n",
809 que_id, rsp->rid, rsp->vp_idx, rsp->hw);
810 /* Use alternate PCI bus number */
811 if (MSB(rsp->rid))
812 options |= BIT_4;
813 /* Use alternate PCI devfn */
814 if (LSB(rsp->rid))
815 options |= BIT_5;
816 /* Enable MSIX handshake mode on for uncapable adapters */
817 if (!IS_MSIX_NACK_CAPABLE(ha))
818 options |= BIT_6;
819
820 /* Set option to indicate response queue creation */
821 options |= BIT_1;
822
823 rsp->options = options;
824 rsp->id = que_id;
825 reg = ISP_QUE_REG(ha, que_id);
826 rsp->rsp_q_in = &reg->isp25mq.rsp_q_in;
827 rsp->rsp_q_out = &reg->isp25mq.rsp_q_out;
828 rsp->in_ptr = (void *)(rsp->ring + rsp->length);
829 mutex_unlock(&ha->mq_lock);
830 ql_dbg(ql_dbg_multiq, base_vha, 0xc00b,
831 "options=%x id=%d rsp_q_in=%p rsp_q_out=%p\n",
832 rsp->options, rsp->id, rsp->rsp_q_in,
833 rsp->rsp_q_out);
834 ql_dbg(ql_dbg_init, base_vha, 0x00e5,
835 "options=%x id=%d rsp_q_in=%p rsp_q_out=%p\n",
836 rsp->options, rsp->id, rsp->rsp_q_in,
837 rsp->rsp_q_out);
838
839 ret = qla25xx_request_irq(ha, qpair, qpair->msix,
840 QLA_MSIX_QPAIR_MULTIQ_RSP_Q);
841 if (ret)
842 goto que_failed;
843
844 ret = qla25xx_init_rsp_que(base_vha, rsp);
845 if (ret != QLA_SUCCESS) {
846 ql_log(ql_log_fatal, base_vha, 0x00e7,
847 "%s failed.\n", __func__);
848 mutex_lock(&ha->mq_lock);
849 clear_bit(que_id, ha->rsp_qid_map);
850 mutex_unlock(&ha->mq_lock);
851 goto que_failed;
852 }
853 rsp->req = NULL;
854
855 qla2x00_init_response_q_entries(rsp);
856 if (qpair->hw->wq)
857 INIT_WORK(&qpair->q_work, qla_do_work);
858 return rsp->id;
859
860 que_failed:
861 qla25xx_free_rsp_que(base_vha, rsp);
862 failed:
863 return 0;
864 }
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