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Merge tag 'iio-for-4.13b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / qedi / qedi_main.c
CommitLineData
ace7f46b
MR		 1/*
2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
4 *
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
7 * this source tree.
8 */
9
10#include <linux/module.h>
11#include <linux/pci.h>
12#include <linux/kernel.h>
13#include <linux/if_arp.h>
14#include <scsi/iscsi_if.h>
15#include <linux/inet.h>
16#include <net/arp.h>
17#include <linux/list.h>
18#include <linux/kthread.h>
19#include <linux/mm.h>
20#include <linux/if_vlan.h>
21#include <linux/cpu.h>
22
23#include <scsi/scsi_cmnd.h>
24#include <scsi/scsi_device.h>
25#include <scsi/scsi_eh.h>
26#include <scsi/scsi_host.h>
27#include <scsi/scsi.h>
28
29#include "qedi.h"
30#include "qedi_gbl.h"
31#include "qedi_iscsi.h"
32
33static uint qedi_fw_debug;
34module_param(qedi_fw_debug, uint, 0644);
35MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
36
37uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
38module_param(qedi_dbg_log, uint, 0644);
39MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
40
41uint qedi_io_tracing;
42module_param(qedi_io_tracing, uint, 0644);
43MODULE_PARM_DESC(qedi_io_tracing,
44 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
45
46const struct qed_iscsi_ops *qedi_ops;
47static struct scsi_transport_template *qedi_scsi_transport;
48static struct pci_driver qedi_pci_driver;
49static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
50static LIST_HEAD(qedi_udev_list);
51/* Static function declaration */
52static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
53static void qedi_free_global_queues(struct qedi_ctx *qedi);
54static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
55static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
56static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
57
58static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
59{
60 struct qedi_ctx *qedi;
61 struct qedi_endpoint *qedi_ep;
62 struct async_data *data;
63 int rval = 0;
64
65 if (!context || !fw_handle) {
66 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
67 return -EINVAL;
68 }
69
70 qedi = (struct qedi_ctx *)context;
71 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
72 "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
73
74 data = (struct async_data *)fw_handle;
75 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
76 "cid=0x%x tid=0x%x err-code=0x%x fw-dbg-param=0x%x\n",
77 data->cid, data->itid, data->error_code,
78 data->fw_debug_param);
79
80 qedi_ep = qedi->ep_tbl[data->cid];
81
82 if (!qedi_ep) {
83 QEDI_WARN(&qedi->dbg_ctx,
84 "Cannot process event, ep already disconnected, cid=0x%x\n",
85 data->cid);
86 WARN_ON(1);
87 return -ENODEV;
88 }
89
90 switch (fw_event_code) {
91 case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
92 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
93 qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
94
95 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
96 break;
97 case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
98 qedi_ep->state = EP_STATE_DISCONN_COMPL;
99 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
100 break;
101 case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
102 qedi_process_iscsi_error(qedi_ep, data);
103 break;
104 case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
105 case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
106 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
107 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
108 case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
109 case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
110 case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
111 qedi_process_tcp_error(qedi_ep, data);
112 break;
113 default:
114 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
115 fw_event_code);
116 }
117
118 return rval;
119}
120
121static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
122{
123 struct qedi_uio_dev *udev = uinfo->priv;
124 struct qedi_ctx *qedi = udev->qedi;
125
126 if (!capable(CAP_NET_ADMIN))
127 return -EPERM;
128
129 if (udev->uio_dev != -1)
130 return -EBUSY;
131
132 rtnl_lock();
133 udev->uio_dev = iminor(inode);
134 qedi_reset_uio_rings(udev);
135 set_bit(UIO_DEV_OPENED, &qedi->flags);
136 rtnl_unlock();
137
138 return 0;
139}
140
141static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
142{
143 struct qedi_uio_dev *udev = uinfo->priv;
144 struct qedi_ctx *qedi = udev->qedi;
145
146 udev->uio_dev = -1;
147 clear_bit(UIO_DEV_OPENED, &qedi->flags);
148 qedi_ll2_free_skbs(qedi);
149 return 0;
150}
151
152static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
153{
5e901d0b
AE		 154 if (udev->uctrl) {
155 free_page((unsigned long)udev->uctrl);
156 udev->uctrl = NULL;
157 }
158
ace7f46b
MR		 159 if (udev->ll2_ring) {
160 free_page((unsigned long)udev->ll2_ring);
161 udev->ll2_ring = NULL;
162 }
163
164 if (udev->ll2_buf) {
165 free_pages((unsigned long)udev->ll2_buf, 2);
166 udev->ll2_buf = NULL;
167 }
168}
169
170static void __qedi_free_uio(struct qedi_uio_dev *udev)
171{
172 uio_unregister_device(&udev->qedi_uinfo);
173
174 __qedi_free_uio_rings(udev);
175
176 pci_dev_put(udev->pdev);
ace7f46b
MR		 177 kfree(udev);
178}
179
180static void qedi_free_uio(struct qedi_uio_dev *udev)
181{
182 if (!udev)
183 return;
184
185 list_del_init(&udev->list);
186 __qedi_free_uio(udev);
187}
188
189static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
190{
191 struct qedi_ctx *qedi = NULL;
192 struct qedi_uio_ctrl *uctrl = NULL;
193
194 qedi = udev->qedi;
195 uctrl = udev->uctrl;
196
197 spin_lock_bh(&qedi->ll2_lock);
198 uctrl->host_rx_cons = 0;
199 uctrl->hw_rx_prod = 0;
200 uctrl->hw_rx_bd_prod = 0;
201 uctrl->host_rx_bd_cons = 0;
202
203 memset(udev->ll2_ring, 0, udev->ll2_ring_size);
204 memset(udev->ll2_buf, 0, udev->ll2_buf_size);
205 spin_unlock_bh(&qedi->ll2_lock);
206}
207
208static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
209{
210 int rc = 0;
211
212 if (udev->ll2_ring || udev->ll2_buf)
213 return rc;
214
5e901d0b
AE		 215 /* Memory for control area. */
216 udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
217 if (!udev->uctrl)
218 return -ENOMEM;
219
ace7f46b
MR		 220 /* Allocating memory for LL2 ring */
221 udev->ll2_ring_size = QEDI_PAGE_SIZE;
222 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
223 if (!udev->ll2_ring) {
224 rc = -ENOMEM;
225 goto exit_alloc_ring;
226 }
227
228 /* Allocating memory for Tx/Rx pkt buffer */
229 udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
230 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
231 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
232 __GFP_ZERO, 2);
233 if (!udev->ll2_buf) {
234 rc = -ENOMEM;
235 goto exit_alloc_buf;
236 }
237 return rc;
238
239exit_alloc_buf:
240 free_page((unsigned long)udev->ll2_ring);
241 udev->ll2_ring = NULL;
242exit_alloc_ring:
243 return rc;
244}
245
246static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
247{
248 struct qedi_uio_dev *udev = NULL;
ace7f46b
MR		 249 int rc = 0;
250
251 list_for_each_entry(udev, &qedi_udev_list, list) {
252 if (udev->pdev == qedi->pdev) {
253 udev->qedi = qedi;
254 if (__qedi_alloc_uio_rings(udev)) {
255 udev->qedi = NULL;
256 return -ENOMEM;
257 }
258 qedi->udev = udev;
259 return 0;
260 }
261 }
262
263 udev = kzalloc(sizeof(*udev), GFP_KERNEL);
264 if (!udev) {
265 rc = -ENOMEM;
266 goto err_udev;
267 }
268
ace7f46b
MR		 269 udev->uio_dev = -1;
270
271 udev->qedi = qedi;
272 udev->pdev = qedi->pdev;
ace7f46b
MR		 273
274 rc = __qedi_alloc_uio_rings(udev);
275 if (rc)
5e901d0b 276 goto err_uctrl;
ace7f46b
MR		 277
278 list_add(&udev->list, &qedi_udev_list);
279
280 pci_dev_get(udev->pdev);
281 qedi->udev = udev;
282
283 udev->tx_pkt = udev->ll2_buf;
284 udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
285 return 0;
286
ace7f46b
MR		 287 err_uctrl:
288 kfree(udev);
289 err_udev:
290 return -ENOMEM;
291}
292
293static int qedi_init_uio(struct qedi_ctx *qedi)
294{
295 struct qedi_uio_dev *udev = qedi->udev;
296 struct uio_info *uinfo;
297 int ret = 0;
298
299 if (!udev)
300 return -ENOMEM;
301
302 uinfo = &udev->qedi_uinfo;
303
304 uinfo->mem[0].addr = (unsigned long)udev->uctrl;
305 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
306 uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
307
308 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
309 uinfo->mem[1].size = udev->ll2_ring_size;
310 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
311
312 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
313 uinfo->mem[2].size = udev->ll2_buf_size;
314 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
315
316 uinfo->name = "qedi_uio";
317 uinfo->version = QEDI_MODULE_VERSION;
318 uinfo->irq = UIO_IRQ_CUSTOM;
319
320 uinfo->open = qedi_uio_open;
321 uinfo->release = qedi_uio_close;
322
323 if (udev->uio_dev == -1) {
324 if (!uinfo->priv) {
325 uinfo->priv = udev;
326
327 ret = uio_register_device(&udev->pdev->dev, uinfo);
328 if (ret) {
329 QEDI_ERR(&qedi->dbg_ctx,
330 "UIO registration failed\n");
331 }
332 }
333 }
334
335 return ret;
336}
337
338static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
339 struct qed_sb_info *sb_info, u16 sb_id)
340{
341 struct status_block *sb_virt;
342 dma_addr_t sb_phys;
343 int ret;
344
345 sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
346 sizeof(struct status_block), &sb_phys,
347 GFP_KERNEL);
348 if (!sb_virt) {
349 QEDI_ERR(&qedi->dbg_ctx,
350 "Status block allocation failed for id = %d.\n",
351 sb_id);
352 return -ENOMEM;
353 }
354
355 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
356 sb_id, QED_SB_TYPE_STORAGE);
357 if (ret) {
358 QEDI_ERR(&qedi->dbg_ctx,
359 "Status block initialization failed for id = %d.\n",
360 sb_id);
361 return ret;
362 }
363
364 return 0;
365}
366
367static void qedi_free_sb(struct qedi_ctx *qedi)
368{
369 struct qed_sb_info *sb_info;
370 int id;
371
372 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
373 sb_info = &qedi->sb_array[id];
374 if (sb_info->sb_virt)
375 dma_free_coherent(&qedi->pdev->dev,
376 sizeof(*sb_info->sb_virt),
377 (void *)sb_info->sb_virt,
378 sb_info->sb_phys);
379 }
380}
381
382static void qedi_free_fp(struct qedi_ctx *qedi)
383{
384 kfree(qedi->fp_array);
385 kfree(qedi->sb_array);
386}
387
388static void qedi_destroy_fp(struct qedi_ctx *qedi)
389{
390 qedi_free_sb(qedi);
391 qedi_free_fp(qedi);
392}
393
394static int qedi_alloc_fp(struct qedi_ctx *qedi)
395{
396 int ret = 0;
397
398 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
399 sizeof(struct qedi_fastpath), GFP_KERNEL);
400 if (!qedi->fp_array) {
401 QEDI_ERR(&qedi->dbg_ctx,
402 "fastpath fp array allocation failed.\n");
403 return -ENOMEM;
404 }
405
406 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
407 sizeof(struct qed_sb_info), GFP_KERNEL);
408 if (!qedi->sb_array) {
409 QEDI_ERR(&qedi->dbg_ctx,
410 "fastpath sb array allocation failed.\n");
411 ret = -ENOMEM;
412 goto free_fp;
413 }
414
415 return ret;
416
417free_fp:
418 qedi_free_fp(qedi);
419 return ret;
420}
421
422static void qedi_int_fp(struct qedi_ctx *qedi)
423{
424 struct qedi_fastpath *fp;
425 int id;
426
427 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
428 sizeof(*qedi->fp_array));
429 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
430 sizeof(*qedi->sb_array));
431
432 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
433 fp = &qedi->fp_array[id];
434 fp->sb_info = &qedi->sb_array[id];
435 fp->sb_id = id;
436 fp->qedi = qedi;
437 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
438 "qedi", id);
439
440 /* fp_array[i] ---- irq cookie
441 * So init data which is needed in int ctx
442 */
443 }
444}
445
446static int qedi_prepare_fp(struct qedi_ctx *qedi)
447{
448 struct qedi_fastpath *fp;
449 int id, ret = 0;
450
451 ret = qedi_alloc_fp(qedi);
452 if (ret)
453 goto err;
454
455 qedi_int_fp(qedi);
456
457 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
458 fp = &qedi->fp_array[id];
459 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
460 if (ret) {
461 QEDI_ERR(&qedi->dbg_ctx,
462 "SB allocation and initialization failed.\n");
463 ret = -EIO;
464 goto err_init;
465 }
466 }
467
468 return 0;
469
470err_init:
471 qedi_free_sb(qedi);
472 qedi_free_fp(qedi);
473err:
474 return ret;
475}
476
477static int qedi_setup_cid_que(struct qedi_ctx *qedi)
478{
479 int i;
480
481 qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
482 sizeof(u32), GFP_KERNEL);
483 if (!qedi->cid_que.cid_que_base)
484 return -ENOMEM;
485
486 qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
487 sizeof(struct qedi_conn *),
488 GFP_KERNEL);
489 if (!qedi->cid_que.conn_cid_tbl) {
490 kfree(qedi->cid_que.cid_que_base);
491 qedi->cid_que.cid_que_base = NULL;
492 return -ENOMEM;
493 }
494
495 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
496 qedi->cid_que.cid_q_prod_idx = 0;
497 qedi->cid_que.cid_q_cons_idx = 0;
498 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
499 qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
500
501 for (i = 0; i < qedi->max_active_conns; i++) {
502 qedi->cid_que.cid_que[i] = i;
503 qedi->cid_que.conn_cid_tbl[i] = NULL;
504 }
505
506 return 0;
507}
508
509static void qedi_release_cid_que(struct qedi_ctx *qedi)
510{
511 kfree(qedi->cid_que.cid_que_base);
512 qedi->cid_que.cid_que_base = NULL;
513
514 kfree(qedi->cid_que.conn_cid_tbl);
515 qedi->cid_que.conn_cid_tbl = NULL;
516}
517
518static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
519 u16 start_id, u16 next)
520{
521 id_tbl->start = start_id;
522 id_tbl->max = size;
523 id_tbl->next = next;
524 spin_lock_init(&id_tbl->lock);
525 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
526 if (!id_tbl->table)
527 return -ENOMEM;
528
529 return 0;
530}
531
532static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
533{
534 kfree(id_tbl->table);
535 id_tbl->table = NULL;
536}
537
538int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
539{
540 int ret = -1;
541
542 id -= id_tbl->start;
543 if (id >= id_tbl->max)
544 return ret;
545
546 spin_lock(&id_tbl->lock);
547 if (!test_bit(id, id_tbl->table)) {
548 set_bit(id, id_tbl->table);
549 ret = 0;
550 }
551 spin_unlock(&id_tbl->lock);
552 return ret;
553}
554
555u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
556{
557 u16 id;
558
559 spin_lock(&id_tbl->lock);
560 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
561 if (id >= id_tbl->max) {
562 id = QEDI_LOCAL_PORT_INVALID;
563 if (id_tbl->next != 0) {
564 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
565 if (id >= id_tbl->next)
566 id = QEDI_LOCAL_PORT_INVALID;
567 }
568 }
569
570 if (id < id_tbl->max) {
571 set_bit(id, id_tbl->table);
572 id_tbl->next = (id + 1) & (id_tbl->max - 1);
573 id += id_tbl->start;
574 }
575
576 spin_unlock(&id_tbl->lock);
577
578 return id;
579}
580
581void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
582{
583 if (id == QEDI_LOCAL_PORT_INVALID)
584 return;
585
586 id -= id_tbl->start;
587 if (id >= id_tbl->max)
588 return;
589
590 clear_bit(id, id_tbl->table);
591}
592
593static void qedi_cm_free_mem(struct qedi_ctx *qedi)
594{
595 kfree(qedi->ep_tbl);
596 qedi->ep_tbl = NULL;
597 qedi_free_id_tbl(&qedi->lcl_port_tbl);
598}
599
600static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
601{
602 u16 port_id;
603
604 qedi->ep_tbl = kzalloc((qedi->max_active_conns *
605 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
606 if (!qedi->ep_tbl)
607 return -ENOMEM;
608 port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
609 if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
610 QEDI_LOCAL_PORT_MIN, port_id)) {
611 qedi_cm_free_mem(qedi);
612 return -ENOMEM;
613 }
614
615 return 0;
616}
617
618static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
619{
620 struct Scsi_Host *shost;
621 struct qedi_ctx *qedi = NULL;
622
623 shost = iscsi_host_alloc(&qedi_host_template,
624 sizeof(struct qedi_ctx), 0);
625 if (!shost) {
626 QEDI_ERR(NULL, "Could not allocate shost\n");
627 goto exit_setup_shost;
628 }
629
630 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
631 shost->max_channel = 0;
632 shost->max_lun = ~0;
633 shost->max_cmd_len = 16;
634 shost->transportt = qedi_scsi_transport;
635
636 qedi = iscsi_host_priv(shost);
637 memset(qedi, 0, sizeof(*qedi));
638 qedi->shost = shost;
639 qedi->dbg_ctx.host_no = shost->host_no;
640 qedi->pdev = pdev;
641 qedi->dbg_ctx.pdev = pdev;
642 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
643 qedi->max_sqes = QEDI_SQ_SIZE;
644
645 if (shost_use_blk_mq(shost))
646 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
647
648 pci_set_drvdata(pdev, qedi);
649
650exit_setup_shost:
651 return qedi;
652}
653
654static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
655{
656 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
657 struct qedi_uio_dev *udev;
658 struct qedi_uio_ctrl *uctrl;
659 struct skb_work_list *work;
660 u32 prod;
661
662 if (!qedi) {
663 QEDI_ERR(NULL, "qedi is NULL\n");
664 return -1;
665 }
666
667 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
668 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
669 "UIO DEV is not opened\n");
670 kfree_skb(skb);
671 return 0;
672 }
673
674 udev = qedi->udev;
675 uctrl = udev->uctrl;
676
677 work = kzalloc(sizeof(*work), GFP_ATOMIC);
678 if (!work) {
679 QEDI_WARN(&qedi->dbg_ctx,
680 "Could not allocate work so dropping frame.\n");
681 kfree_skb(skb);
682 return 0;
683 }
684
685 INIT_LIST_HEAD(&work->list);
686 work->skb = skb;
687
688 if (skb_vlan_tag_present(skb))
689 work->vlan_id = skb_vlan_tag_get(skb);
690
691 if (work->vlan_id)
692 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
693
694 spin_lock_bh(&qedi->ll2_lock);
695 list_add_tail(&work->list, &qedi->ll2_skb_list);
696
697 ++uctrl->hw_rx_prod_cnt;
698 prod = (uctrl->hw_rx_prod + 1) % RX_RING;
699 if (prod != uctrl->host_rx_cons) {
700 uctrl->hw_rx_prod = prod;
701 spin_unlock_bh(&qedi->ll2_lock);
702 wake_up_process(qedi->ll2_recv_thread);
703 return 0;
704 }
705
706 spin_unlock_bh(&qedi->ll2_lock);
707 return 0;
708}
709
710/* map this skb to iscsiuio mmaped region */
711static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
712 u16 vlan_id)
713{
714 struct qedi_uio_dev *udev = NULL;
715 struct qedi_uio_ctrl *uctrl = NULL;
716 struct qedi_rx_bd rxbd;
717 struct qedi_rx_bd *p_rxbd;
718 u32 rx_bd_prod;
719 void *pkt;
720 int len = 0;
721
722 if (!qedi) {
723 QEDI_ERR(NULL, "qedi is NULL\n");
724 return -1;
725 }
726
727 udev = qedi->udev;
728 uctrl = udev->uctrl;
729 pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
730 len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
731 memcpy(pkt, skb->data, len);
732
733 memset(&rxbd, 0, sizeof(rxbd));
734 rxbd.rx_pkt_index = uctrl->hw_rx_prod;
735 rxbd.rx_pkt_len = len;
736 rxbd.vlan_id = vlan_id;
737
738 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
739 rx_bd_prod = uctrl->hw_rx_bd_prod;
740 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
741 p_rxbd += rx_bd_prod;
742
743 memcpy(p_rxbd, &rxbd, sizeof(rxbd));
744
745 /* notify the iscsiuio about new packet */
746 uio_event_notify(&udev->qedi_uinfo);
747
748 return 0;
749}
750
751static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
752{
753 struct skb_work_list *work, *work_tmp;
754
755 spin_lock_bh(&qedi->ll2_lock);
756 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
757 list_del(&work->list);
758 if (work->skb)
759 kfree_skb(work->skb);
760 kfree(work);
761 }
762 spin_unlock_bh(&qedi->ll2_lock);
763}
764
765static int qedi_ll2_recv_thread(void *arg)
766{
767 struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
768 struct skb_work_list *work, *work_tmp;
769
770 set_user_nice(current, -20);
771
772 while (!kthread_should_stop()) {
773 spin_lock_bh(&qedi->ll2_lock);
774 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
775 list) {
776 list_del(&work->list);
777 qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
778 kfree_skb(work->skb);
779 kfree(work);
780 }
781 set_current_state(TASK_INTERRUPTIBLE);
782 spin_unlock_bh(&qedi->ll2_lock);
783 schedule();
784 }
785
786 __set_current_state(TASK_RUNNING);
787 return 0;
788}
789
790static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
791{
792 u8 num_sq_pages;
793 u32 log_page_size;
794 int rval = 0;
795
796 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "Min number of MSIX %d\n",
797 MIN_NUM_CPUS_MSIX(qedi));
798
799 num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
800
801 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
802
803 memset(&qedi->pf_params.iscsi_pf_params, 0,
804 sizeof(qedi->pf_params.iscsi_pf_params));
805
806 qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
807 qedi->num_queues * sizeof(struct qedi_glbl_q_params),
808 &qedi->hw_p_cpuq);
809 if (!qedi->p_cpuq) {
810 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
811 rval = -1;
812 goto err_alloc_mem;
813 }
814
815 rval = qedi_alloc_global_queues(qedi);
816 if (rval) {
817 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
818 rval = -1;
819 goto err_alloc_mem;
820 }
821
822 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
823 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
824 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
825 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
826 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
827 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
828 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
829 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
962ea1c0 830 qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
3d61a313 831 qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
ace7f46b
MR		 832
833 for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
834 if ((1 << log_page_size) == PAGE_SIZE)
835 break;
836 }
837 qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
838
839 qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
840 (u64)qedi->hw_p_cpuq;
841
842 /* RQ BDQ initializations.
843 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
844 * rqe_log_size: 8 for 256B RQE
845 */
846 qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
847 /* BDQ address and size */
848 qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
849 qedi->bdq_pbl_list_dma;
850 qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
851 qedi->bdq_pbl_list_num_entries;
852 qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
853
854 /* cq_num_entries: num_tasks + rq_num_entries */
855 qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
856
857 qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
858 qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
859 qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
860
861err_alloc_mem:
862 return rval;
863}
864
865/* Free DMA coherent memory for array of queue pointers we pass to qed */
866static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
867{
868 size_t size = 0;
869
870 if (qedi->p_cpuq) {
871 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
872 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
873 qedi->hw_p_cpuq);
874 }
875
876 qedi_free_global_queues(qedi);
877
878 kfree(qedi->global_queues);
879}
880
881static void qedi_link_update(void *dev, struct qed_link_output *link)
882{
883 struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
884
885 if (link->link_up) {
886 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
887 atomic_set(&qedi->link_state, QEDI_LINK_UP);
888 } else {
889 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
890 "Link Down event.\n");
891 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
892 }
893}
894
895static struct qed_iscsi_cb_ops qedi_cb_ops = {
896 {
897 .link_update = qedi_link_update,
898 }
899};
900
901static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
902 u16 que_idx, struct qedi_percpu_s *p)
903{
904 struct qedi_work *qedi_work;
905 struct qedi_conn *q_conn;
906 struct iscsi_conn *conn;
907 struct qedi_cmd *qedi_cmd;
908 u32 iscsi_cid;
909 int rc = 0;
910
911 iscsi_cid = cqe->cqe_common.conn_id;
912 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
913 if (!q_conn) {
914 QEDI_WARN(&qedi->dbg_ctx,
915 "Session no longer exists for cid=0x%x!!\n",
916 iscsi_cid);
917 return -1;
918 }
919 conn = q_conn->cls_conn->dd_data;
920
921 switch (cqe->cqe_common.cqe_type) {
922 case ISCSI_CQE_TYPE_SOLICITED:
923 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
924 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
925 if (!qedi_cmd) {
926 rc = -1;
927 break;
928 }
929 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
930 qedi_cmd->cqe_work.qedi = qedi;
931 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
932 qedi_cmd->cqe_work.que_idx = que_idx;
933 qedi_cmd->cqe_work.is_solicited = true;
934 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
935 break;
936 case ISCSI_CQE_TYPE_UNSOLICITED:
937 case ISCSI_CQE_TYPE_DUMMY:
938 case ISCSI_CQE_TYPE_TASK_CLEANUP:
939 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
940 if (!qedi_work) {
941 rc = -1;
942 break;
943 }
944 INIT_LIST_HEAD(&qedi_work->list);
945 qedi_work->qedi = qedi;
946 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
947 qedi_work->que_idx = que_idx;
948 qedi_work->is_solicited = false;
949 list_add_tail(&qedi_work->list, &p->work_list);
950 break;
951 default:
952 rc = -1;
953 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
954 }
955 return rc;
956}
957
958static bool qedi_process_completions(struct qedi_fastpath *fp)
959{
960 struct qedi_ctx *qedi = fp->qedi;
961 struct qed_sb_info *sb_info = fp->sb_info;
962 struct status_block *sb = sb_info->sb_virt;
963 struct qedi_percpu_s *p = NULL;
964 struct global_queue *que;
965 u16 prod_idx;
966 unsigned long flags;
967 union iscsi_cqe *cqe;
968 int cpu;
969 int ret;
970
971 /* Get the current firmware producer index */
972 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
973
974 if (prod_idx >= QEDI_CQ_SIZE)
975 prod_idx = prod_idx % QEDI_CQ_SIZE;
976
977 que = qedi->global_queues[fp->sb_id];
978 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
979 "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
980 que, prod_idx, que->cq_cons_idx, fp->sb_id);
981
982 qedi->intr_cpu = fp->sb_id;
983 cpu = smp_processor_id();
984 p = &per_cpu(qedi_percpu, cpu);
985
986 if (unlikely(!p->iothread))
987 WARN_ON(1);
988
989 spin_lock_irqsave(&p->p_work_lock, flags);
990 while (que->cq_cons_idx != prod_idx) {
991 cqe = &que->cq[que->cq_cons_idx];
992
993 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
994 "cqe=%p prod_idx=%d cons_idx=%d.\n",
995 cqe, prod_idx, que->cq_cons_idx);
996
997 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
998 if (ret)
999 continue;
1000
1001 que->cq_cons_idx++;
1002 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1003 que->cq_cons_idx = 0;
1004 }
1005 wake_up_process(p->iothread);
1006 spin_unlock_irqrestore(&p->p_work_lock, flags);
1007
1008 return true;
1009}
1010
1011static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1012{
1013 struct qedi_ctx *qedi = fp->qedi;
1014 struct global_queue *que;
1015 struct qed_sb_info *sb_info = fp->sb_info;
1016 struct status_block *sb = sb_info->sb_virt;
1017 u16 prod_idx;
1018
1019 barrier();
1020
1021 /* Get the current firmware producer index */
1022 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1023
1024 /* Get the pointer to the global CQ this completion is on */
1025 que = qedi->global_queues[fp->sb_id];
1026
1027 /* prod idx wrap around uint16 */
1028 if (prod_idx >= QEDI_CQ_SIZE)
1029 prod_idx = prod_idx % QEDI_CQ_SIZE;
1030
1031 return (que->cq_cons_idx != prod_idx);
1032}
1033
1034/* MSI-X fastpath handler code */
1035static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1036{
1037 struct qedi_fastpath *fp = dev_id;
1038 struct qedi_ctx *qedi = fp->qedi;
1039 bool wake_io_thread = true;
1040
1041 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1042
1043process_again:
1044 wake_io_thread = qedi_process_completions(fp);
1045 if (wake_io_thread) {
1046 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1047 "process already running\n");
1048 }
1049
1050 if (qedi_fp_has_work(fp) == 0)
1051 qed_sb_update_sb_idx(fp->sb_info);
1052
1053 /* Check for more work */
1054 rmb();
1055
1056 if (qedi_fp_has_work(fp) == 0)
1057 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1058 else
1059 goto process_again;
1060
1061 return IRQ_HANDLED;
1062}
1063
1064/* simd handler for MSI/INTa */
1065static void qedi_simd_int_handler(void *cookie)
1066{
1067 /* Cookie is qedi_ctx struct */
1068 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1069
1070 QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1071}
1072
1073#define QEDI_SIMD_HANDLER_NUM 0
1074static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1075{
1076 int i;
1077
1078 if (qedi->int_info.msix_cnt) {
1079 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1080 synchronize_irq(qedi->int_info.msix[i].vector);
1081 irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1082 NULL);
1083 free_irq(qedi->int_info.msix[i].vector,
1084 &qedi->fp_array[i]);
1085 }
1086 } else {
1087 qedi_ops->common->simd_handler_clean(qedi->cdev,
1088 QEDI_SIMD_HANDLER_NUM);
1089 }
1090
1091 qedi->int_info.used_cnt = 0;
1092 qedi_ops->common->set_fp_int(qedi->cdev, 0);
1093}
1094
1095static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1096{
1097 int i, rc, cpu;
1098
1099 cpu = cpumask_first(cpu_online_mask);
1100 for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1101 rc = request_irq(qedi->int_info.msix[i].vector,
1102 qedi_msix_handler, 0, "qedi",
1103 &qedi->fp_array[i]);
1104
1105 if (rc) {
1106 QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1107 qedi_sync_free_irqs(qedi);
1108 return rc;
1109 }
1110 qedi->int_info.used_cnt++;
1111 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1112 get_cpu_mask(cpu));
1113 cpu = cpumask_next(cpu, cpu_online_mask);
1114 }
1115
1116 return 0;
1117}
1118
1119static int qedi_setup_int(struct qedi_ctx *qedi)
1120{
1121 int rc = 0;
1122
1123 rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1124 rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1125 if (rc)
1126 goto exit_setup_int;
1127
1128 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1129 "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1130 qedi->int_info.msix_cnt, num_online_cpus());
1131
1132 if (qedi->int_info.msix_cnt) {
1133 rc = qedi_request_msix_irq(qedi);
1134 goto exit_setup_int;
1135 } else {
1136 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1137 QEDI_SIMD_HANDLER_NUM,
1138 qedi_simd_int_handler);
1139 qedi->int_info.used_cnt = 1;
1140 }
1141
1142exit_setup_int:
1143 return rc;
1144}
1145
1146static void qedi_free_bdq(struct qedi_ctx *qedi)
1147{
1148 int i;
1149
1150 if (qedi->bdq_pbl_list)
1151 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1152 qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1153
1154 if (qedi->bdq_pbl)
1155 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1156 qedi->bdq_pbl, qedi->bdq_pbl_dma);
1157
1158 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1159 if (qedi->bdq[i].buf_addr) {
1160 dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1161 qedi->bdq[i].buf_addr,
1162 qedi->bdq[i].buf_dma);
1163 }
1164 }
1165}
1166
1167static void qedi_free_global_queues(struct qedi_ctx *qedi)
1168{
1169 int i;
1170 struct global_queue **gl = qedi->global_queues;
1171
1172 for (i = 0; i < qedi->num_queues; i++) {
1173 if (!gl[i])
1174 continue;
1175
1176 if (gl[i]->cq)
1177 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1178 gl[i]->cq, gl[i]->cq_dma);
1179 if (gl[i]->cq_pbl)
1180 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1181 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1182
1183 kfree(gl[i]);
1184 }
1185 qedi_free_bdq(qedi);
1186}
1187
1188static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1189{
1190 int i;
1191 struct scsi_bd *pbl;
1192 u64 *list;
1193 dma_addr_t page;
1194
1195 /* Alloc dma memory for BDQ buffers */
1196 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1197 qedi->bdq[i].buf_addr =
1198 dma_alloc_coherent(&qedi->pdev->dev,
1199 QEDI_BDQ_BUF_SIZE,
1200 &qedi->bdq[i].buf_dma,
1201 GFP_KERNEL);
1202 if (!qedi->bdq[i].buf_addr) {
1203 QEDI_ERR(&qedi->dbg_ctx,
1204 "Could not allocate BDQ buffer %d.\n", i);
1205 return -ENOMEM;
1206 }
1207 }
1208
1209 /* Alloc dma memory for BDQ page buffer list */
1210 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1211 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1212 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1213
1214 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1215 qedi->rq_num_entries);
1216
1217 qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1218 qedi->bdq_pbl_mem_size,
1219 &qedi->bdq_pbl_dma, GFP_KERNEL);
1220 if (!qedi->bdq_pbl) {
1221 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1222 return -ENOMEM;
1223 }
1224
1225 /*
1226 * Populate BDQ PBL with physical and virtual address of individual
1227 * BDQ buffers
1228 */
1229 pbl = (struct scsi_bd *)qedi->bdq_pbl;
1230 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1231 pbl->address.hi =
1232 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1233 pbl->address.lo =
1234 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1235 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1236 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1237 pbl, pbl->address.hi, pbl->address.lo, i);
1238 pbl->opaque.hi = 0;
1239 pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
1240 pbl++;
1241 }
1242
1243 /* Allocate list of PBL pages */
1244 qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1245 PAGE_SIZE,
1246 &qedi->bdq_pbl_list_dma,
1247 GFP_KERNEL);
1248 if (!qedi->bdq_pbl_list) {
1249 QEDI_ERR(&qedi->dbg_ctx,
1250 "Could not allocate list of PBL pages.\n");
1251 return -ENOMEM;
1252 }
1253 memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
1254
1255 /*
1256 * Now populate PBL list with pages that contain pointers to the
1257 * individual buffers.
1258 */
1259 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1260 list = (u64 *)qedi->bdq_pbl_list;
1261 page = qedi->bdq_pbl_list_dma;
1262 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1263 *list = qedi->bdq_pbl_dma;
1264 list++;
1265 page += PAGE_SIZE;
1266 }
1267
1268 return 0;
1269}
1270
1271static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1272{
1273 u32 *list;
1274 int i;
1275 int status = 0, rc;
1276 u32 *pbl;
1277 dma_addr_t page;
1278 int num_pages;
1279
1280 /*
1281 * Number of global queues (CQ / RQ). This should
1282 * be <= number of available MSIX vectors for the PF
1283 */
1284 if (!qedi->num_queues) {
1285 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1286 return 1;
1287 }
1288
1289 /* Make sure we allocated the PBL that will contain the physical
1290 * addresses of our queues
1291 */
1292 if (!qedi->p_cpuq) {
1293 status = 1;
1294 goto mem_alloc_failure;
1295 }
1296
1297 qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1298 qedi->num_queues), GFP_KERNEL);
1299 if (!qedi->global_queues) {
1300 QEDI_ERR(&qedi->dbg_ctx,
1301 "Unable to allocate global queues array ptr memory\n");
1302 return -ENOMEM;
1303 }
1304 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1305 "qedi->global_queues=%p.\n", qedi->global_queues);
1306
1307 /* Allocate DMA coherent buffers for BDQ */
1308 rc = qedi_alloc_bdq(qedi);
1309 if (rc)
1310 goto mem_alloc_failure;
1311
1312 /* Allocate a CQ and an associated PBL for each MSI-X
1313 * vector.
1314 */
1315 for (i = 0; i < qedi->num_queues; i++) {
1316 qedi->global_queues[i] =
1317 kzalloc(sizeof(*qedi->global_queues[0]),
1318 GFP_KERNEL);
1319 if (!qedi->global_queues[i]) {
1320 QEDI_ERR(&qedi->dbg_ctx,
1321 "Unable to allocation global queue %d.\n", i);
1322 goto mem_alloc_failure;
1323 }
1324
1325 qedi->global_queues[i]->cq_mem_size =
1326 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1327 qedi->global_queues[i]->cq_mem_size =
1328 (qedi->global_queues[i]->cq_mem_size +
1329 (QEDI_PAGE_SIZE - 1));
1330
1331 qedi->global_queues[i]->cq_pbl_size =
1332 (qedi->global_queues[i]->cq_mem_size /
1333 QEDI_PAGE_SIZE) * sizeof(void *);
1334 qedi->global_queues[i]->cq_pbl_size =
1335 (qedi->global_queues[i]->cq_pbl_size +
1336 (QEDI_PAGE_SIZE - 1));
1337
1338 qedi->global_queues[i]->cq =
1339 dma_alloc_coherent(&qedi->pdev->dev,
1340 qedi->global_queues[i]->cq_mem_size,
1341 &qedi->global_queues[i]->cq_dma,
1342 GFP_KERNEL);
1343
1344 if (!qedi->global_queues[i]->cq) {
1345 QEDI_WARN(&qedi->dbg_ctx,
1346 "Could not allocate cq.\n");
1347 status = -ENOMEM;
1348 goto mem_alloc_failure;
1349 }
1350 memset(qedi->global_queues[i]->cq, 0,
1351 qedi->global_queues[i]->cq_mem_size);
1352
1353 qedi->global_queues[i]->cq_pbl =
1354 dma_alloc_coherent(&qedi->pdev->dev,
1355 qedi->global_queues[i]->cq_pbl_size,
1356 &qedi->global_queues[i]->cq_pbl_dma,
1357 GFP_KERNEL);
1358
1359 if (!qedi->global_queues[i]->cq_pbl) {
1360 QEDI_WARN(&qedi->dbg_ctx,
1361 "Could not allocate cq PBL.\n");
1362 status = -ENOMEM;
1363 goto mem_alloc_failure;
1364 }
1365 memset(qedi->global_queues[i]->cq_pbl, 0,
1366 qedi->global_queues[i]->cq_pbl_size);
1367
1368 /* Create PBL */
1369 num_pages = qedi->global_queues[i]->cq_mem_size /
1370 QEDI_PAGE_SIZE;
1371 page = qedi->global_queues[i]->cq_dma;
1372 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1373
1374 while (num_pages--) {
1375 *pbl = (u32)page;
1376 pbl++;
1377 *pbl = (u32)((u64)page >> 32);
1378 pbl++;
1379 page += QEDI_PAGE_SIZE;
1380 }
1381 }
1382
1383 list = (u32 *)qedi->p_cpuq;
1384
1385 /*
1386 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1387 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
1388 * to the physical address which contains an array of pointers to the
1389 * physical addresses of the specific queue pages.
1390 */
1391 for (i = 0; i < qedi->num_queues; i++) {
1392 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1393 list++;
1394 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1395 list++;
1396
1397 *list = (u32)0;
1398 list++;
1399 *list = (u32)((u64)0 >> 32);
1400 list++;
1401 }
1402
1403 return 0;
1404
1405mem_alloc_failure:
1406 qedi_free_global_queues(qedi);
1407 return status;
1408}
1409
1410int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1411{
1412 int rval = 0;
1413 u32 *pbl;
1414 dma_addr_t page;
1415 int num_pages;
1416
1417 if (!ep)
1418 return -EIO;
1419
1420 /* Calculate appropriate queue and PBL sizes */
1421 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1422 ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1423
1424 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1425 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1426
1427 ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1428 &ep->sq_dma, GFP_KERNEL);
1429 if (!ep->sq) {
1430 QEDI_WARN(&qedi->dbg_ctx,
1431 "Could not allocate send queue.\n");
1432 rval = -ENOMEM;
1433 goto out;
1434 }
1435 memset(ep->sq, 0, ep->sq_mem_size);
1436
1437 ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1438 &ep->sq_pbl_dma, GFP_KERNEL);
1439 if (!ep->sq_pbl) {
1440 QEDI_WARN(&qedi->dbg_ctx,
1441 "Could not allocate send queue PBL.\n");
1442 rval = -ENOMEM;
1443 goto out_free_sq;
1444 }
1445 memset(ep->sq_pbl, 0, ep->sq_pbl_size);
1446
1447 /* Create PBL */
1448 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1449 page = ep->sq_dma;
1450 pbl = (u32 *)ep->sq_pbl;
1451
1452 while (num_pages--) {
1453 *pbl = (u32)page;
1454 pbl++;
1455 *pbl = (u32)((u64)page >> 32);
1456 pbl++;
1457 page += QEDI_PAGE_SIZE;
1458 }
1459
1460 return rval;
1461
1462out_free_sq:
1463 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1464 ep->sq_dma);
1465out:
1466 return rval;
1467}
1468
1469void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1470{
1471 if (ep->sq_pbl)
1472 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1473 ep->sq_pbl_dma);
1474 if (ep->sq)
1475 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1476 ep->sq_dma);
1477}
1478
1479int qedi_get_task_idx(struct qedi_ctx *qedi)
1480{
1481 s16 tmp_idx;
1482
1483again:
1484 tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1485 MAX_ISCSI_TASK_ENTRIES);
1486
1487 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1488 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1489 tmp_idx = -1;
1490 goto err_idx;
1491 }
1492
1493 if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1494 goto again;
1495
1496err_idx:
1497 return tmp_idx;
1498}
1499
1500void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1501{
1502 if (!test_and_clear_bit(idx, qedi->task_idx_map)) {
1503 QEDI_ERR(&qedi->dbg_ctx,
1504 "FW task context, already cleared, tid=0x%x\n", idx);
1505 WARN_ON(1);
1506 }
1507}
1508
1509void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1510 struct qedi_cmd *cmd)
1511{
1512 qedi->itt_map[tid].itt = proto_itt;
1513 qedi->itt_map[tid].p_cmd = cmd;
1514
1515 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1516 "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1517 qedi->itt_map[tid].itt);
1518}
1519
1520void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1521{
1522 u16 i;
1523
1524 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1525 if (qedi->itt_map[i].itt == itt) {
1526 *tid = i;
1527 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1528 "Ref itt=0x%x, found at tid=0x%x\n",
1529 itt, *tid);
1530 return;
1531 }
1532 }
1533
1534 WARN_ON(1);
1535}
1536
1537void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1538{
1539 *proto_itt = qedi->itt_map[tid].itt;
1540 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1541 "Get itt map tid [0x%x with proto itt[0x%x]",
1542 tid, *proto_itt);
1543}
1544
1545struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1546{
1547 struct qedi_cmd *cmd = NULL;
1548
1549 if (tid > MAX_ISCSI_TASK_ENTRIES)
1550 return NULL;
1551
1552 cmd = qedi->itt_map[tid].p_cmd;
1553 if (cmd->task_id != tid)
1554 return NULL;
1555
1556 qedi->itt_map[tid].p_cmd = NULL;
1557
1558 return cmd;
1559}
1560
1561static int qedi_alloc_itt(struct qedi_ctx *qedi)
1562{
1563 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1564 sizeof(struct qedi_itt_map), GFP_KERNEL);
1565 if (!qedi->itt_map) {
1566 QEDI_ERR(&qedi->dbg_ctx,
1567 "Unable to allocate itt map array memory\n");
1568 return -ENOMEM;
1569 }
1570 return 0;
1571}
1572
1573static void qedi_free_itt(struct qedi_ctx *qedi)
1574{
1575 kfree(qedi->itt_map);
1576}
1577
1578static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1579 .rx_cb = qedi_ll2_rx,
1580 .tx_cb = NULL,
1581};
1582
1583static int qedi_percpu_io_thread(void *arg)
1584{
1585 struct qedi_percpu_s *p = arg;
1586 struct qedi_work *work, *tmp;
1587 unsigned long flags;
1588 LIST_HEAD(work_list);
1589
1590 set_user_nice(current, -20);
1591
1592 while (!kthread_should_stop()) {
1593 spin_lock_irqsave(&p->p_work_lock, flags);
1594 while (!list_empty(&p->work_list)) {
1595 list_splice_init(&p->work_list, &work_list);
1596 spin_unlock_irqrestore(&p->p_work_lock, flags);
1597
1598 list_for_each_entry_safe(work, tmp, &work_list, list) {
1599 list_del_init(&work->list);
1600 qedi_fp_process_cqes(work);
1601 if (!work->is_solicited)
1602 kfree(work);
1603 }
1604 cond_resched();
1605 spin_lock_irqsave(&p->p_work_lock, flags);
1606 }
1607 set_current_state(TASK_INTERRUPTIBLE);
1608 spin_unlock_irqrestore(&p->p_work_lock, flags);
1609 schedule();
1610 }
1611 __set_current_state(TASK_RUNNING);
1612
1613 return 0;
1614}
1615
a98d1a0c 1616static int qedi_cpu_online(unsigned int cpu)
ace7f46b 1617{
a98d1a0c 1618 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
ace7f46b
MR		 1619 struct task_struct *thread;
1620
ace7f46b
MR		 1621 thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1622 cpu_to_node(cpu),
1623 "qedi_thread/%d", cpu);
a98d1a0c
TG		 1624 if (IS_ERR(thread))
1625 return PTR_ERR(thread);
1626
1627 kthread_bind(thread, cpu);
1628 p->iothread = thread;
1629 wake_up_process(thread);
1630 return 0;
ace7f46b
MR		 1631}
1632
a98d1a0c 1633static int qedi_cpu_offline(unsigned int cpu)
ace7f46b 1634{
a98d1a0c 1635 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
ace7f46b 1636 struct qedi_work *work, *tmp;
a98d1a0c 1637 struct task_struct *thread;
ace7f46b 1638
ace7f46b
MR		 1639 spin_lock_bh(&p->p_work_lock);
1640 thread = p->iothread;
1641 p->iothread = NULL;
1642
1643 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1644 list_del_init(&work->list);
1645 qedi_fp_process_cqes(work);
1646 if (!work->is_solicited)
1647 kfree(work);
1648 }
1649
1650 spin_unlock_bh(&p->p_work_lock);
1651 if (thread)
1652 kthread_stop(thread);
a98d1a0c 1653 return 0;
ace7f46b
MR		 1654}
1655
ace7f46b
MR		 1656void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1657{
1658 struct qed_ll2_params params;
1659
1660 qedi_recover_all_conns(qedi);
1661
1662 qedi_ops->ll2->stop(qedi->cdev);
1663 qedi_ll2_free_skbs(qedi);
1664
1665 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1666 qedi->ll2_mtu, mtu);
1667 memset(&params, 0, sizeof(params));
1668 qedi->ll2_mtu = mtu;
1669 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1670 params.drop_ttl0_packets = 0;
1671 params.rx_vlan_stripping = 1;
1672 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1673 qedi_ops->ll2->start(qedi->cdev, &params);
1674}
1675
1676static void __qedi_remove(struct pci_dev *pdev, int mode)
1677{
1678 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
1679
1680 if (qedi->tmf_thread) {
1681 flush_workqueue(qedi->tmf_thread);
1682 destroy_workqueue(qedi->tmf_thread);
1683 qedi->tmf_thread = NULL;
1684 }
1685
1686 if (qedi->offload_thread) {
1687 flush_workqueue(qedi->offload_thread);
1688 destroy_workqueue(qedi->offload_thread);
1689 qedi->offload_thread = NULL;
1690 }
1691
1692#ifdef CONFIG_DEBUG_FS
1693 qedi_dbg_host_exit(&qedi->dbg_ctx);
1694#endif
1695 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
1696 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1697
1698 qedi_sync_free_irqs(qedi);
1699
1700 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1701 qedi_ops->stop(qedi->cdev);
1702 qedi_ops->ll2->stop(qedi->cdev);
1703 }
1704
1705 if (mode == QEDI_MODE_NORMAL)
1706 qedi_free_iscsi_pf_param(qedi);
1707
1708 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1709 qedi_ops->common->slowpath_stop(qedi->cdev);
1710 qedi_ops->common->remove(qedi->cdev);
1711 }
1712
1713 qedi_destroy_fp(qedi);
1714
1715 if (mode == QEDI_MODE_NORMAL) {
1716 qedi_release_cid_que(qedi);
1717 qedi_cm_free_mem(qedi);
1718 qedi_free_uio(qedi->udev);
1719 qedi_free_itt(qedi);
1720
1721 iscsi_host_remove(qedi->shost);
1722 iscsi_host_free(qedi->shost);
1723
1724 if (qedi->ll2_recv_thread) {
1725 kthread_stop(qedi->ll2_recv_thread);
1726 qedi->ll2_recv_thread = NULL;
1727 }
1728 qedi_ll2_free_skbs(qedi);
1729 }
1730}
1731
1732static int __qedi_probe(struct pci_dev *pdev, int mode)
1733{
1734 struct qedi_ctx *qedi;
1735 struct qed_ll2_params params;
1736 u32 dp_module = 0;
1737 u8 dp_level = 0;
1738 bool is_vf = false;
1739 char host_buf[16];
1740 struct qed_link_params link_params;
1741 struct qed_slowpath_params sp_params;
1742 struct qed_probe_params qed_params;
1743 void *task_start, *task_end;
1744 int rc;
1745 u16 tmp;
1746
1747 if (mode != QEDI_MODE_RECOVERY) {
1748 qedi = qedi_host_alloc(pdev);
1749 if (!qedi) {
1750 rc = -ENOMEM;
1751 goto exit_probe;
1752 }
1753 } else {
1754 qedi = pci_get_drvdata(pdev);
1755 }
1756
1757 memset(&qed_params, 0, sizeof(qed_params));
1758 qed_params.protocol = QED_PROTOCOL_ISCSI;
1759 qed_params.dp_module = dp_module;
1760 qed_params.dp_level = dp_level;
1761 qed_params.is_vf = is_vf;
1762 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
1763 if (!qedi->cdev) {
1764 rc = -ENODEV;
1765 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
1766 goto free_host;
1767 }
1768
1769 qedi->msix_count = MAX_NUM_MSIX_PF;
1770 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1771
1772 if (mode != QEDI_MODE_RECOVERY) {
1773 rc = qedi_set_iscsi_pf_param(qedi);
1774 if (rc) {
1775 rc = -ENOMEM;
1776 QEDI_ERR(&qedi->dbg_ctx,
1777 "Set iSCSI pf param fail\n");
1778 goto free_host;
1779 }
1780 }
1781
1782 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1783
1784 rc = qedi_prepare_fp(qedi);
1785 if (rc) {
1786 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
1787 goto free_pf_params;
1788 }
1789
1790 /* Start the Slowpath-process */
1791 memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
1792 sp_params.int_mode = QED_INT_MODE_MSIX;
1793 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
1794 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
1795 sp_params.drv_rev = QEDI_DRIVER_REV_VER;
1796 sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
1797 strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
1798 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
1799 if (rc) {
1800 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
1801 goto stop_hw;
1802 }
1803
1804 /* update_pf_params needs to be called before and after slowpath
1805 * start
1806 */
1807 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1808
d1a9ccc4 1809 rc = qedi_setup_int(qedi);
ace7f46b
MR		 1810 if (rc)
1811 goto stop_iscsi_func;
1812
1813 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1814
1815 /* Learn information crucial for qedi to progress */
1816 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
1817 if (rc)
1818 goto stop_iscsi_func;
1819
1820 /* Record BDQ producer doorbell addresses */
1821 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
1822 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
1823 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1824 "BDQ primary_prod=%p secondary_prod=%p.\n",
1825 qedi->bdq_primary_prod,
1826 qedi->bdq_secondary_prod);
1827
1828 /*
1829 * We need to write the number of BDs in the BDQ we've preallocated so
1830 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
1831 * packet arrives.
1832 */
1833 qedi->bdq_prod_idx = QEDI_BDQ_NUM;
1834 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1835 "Writing %d to primary and secondary BDQ doorbell registers.\n",
1836 qedi->bdq_prod_idx);
1837 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
1838 tmp = readw(qedi->bdq_primary_prod);
1839 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
1840 tmp = readw(qedi->bdq_secondary_prod);
1841
1842 ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
1843 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
1844 qedi->mac);
1845
1846 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1847 qedi_ops->common->set_id(qedi->cdev, host_buf, QEDI_MODULE_VERSION);
1848
1849 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
1850
1851 memset(&params, 0, sizeof(params));
1852 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
1853 qedi->ll2_mtu = DEF_PATH_MTU;
1854 params.drop_ttl0_packets = 0;
1855 params.rx_vlan_stripping = 1;
1856 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1857
1858 if (mode != QEDI_MODE_RECOVERY) {
1859 /* set up rx path */
1860 INIT_LIST_HEAD(&qedi->ll2_skb_list);
1861 spin_lock_init(&qedi->ll2_lock);
1862 /* start qedi context */
1863 spin_lock_init(&qedi->hba_lock);
1864 spin_lock_init(&qedi->task_idx_lock);
1865 }
1866 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
1867 qedi_ops->ll2->start(qedi->cdev, &params);
1868
1869 if (mode != QEDI_MODE_RECOVERY) {
1870 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
1871 (void *)qedi,
1872 "qedi_ll2_thread");
1873 }
1874
1875 rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
1876 qedi, qedi_iscsi_event_cb);
1877 if (rc) {
1878 rc = -ENODEV;
1879 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
1880 goto stop_slowpath;
1881 }
1882
1883 task_start = qedi_get_task_mem(&qedi->tasks, 0);
1884 task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
1885 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1886 "Task context start=%p, end=%p block_size=%u.\n",
1887 task_start, task_end, qedi->tasks.size);
1888
1889 memset(&link_params, 0, sizeof(link_params));
1890 link_params.link_up = true;
1891 rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
1892 if (rc) {
1893 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
1894 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1895 }
1896
1897#ifdef CONFIG_DEBUG_FS
1898 qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
1899 &qedi_dbg_fops);
1900#endif
1901 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1902 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
1903 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
1904 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
1905
1906 if (mode == QEDI_MODE_NORMAL) {
1907 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
1908 QEDI_ERR(&qedi->dbg_ctx,
1909 "Could not add iscsi host\n");
1910 rc = -ENOMEM;
1911 goto remove_host;
1912 }
1913
1914 /* Allocate uio buffers */
1915 rc = qedi_alloc_uio_rings(qedi);
1916 if (rc) {
1917 QEDI_ERR(&qedi->dbg_ctx,
1918 "UIO alloc ring failed err=%d\n", rc);
1919 goto remove_host;
1920 }
1921
1922 rc = qedi_init_uio(qedi);
1923 if (rc) {
1924 QEDI_ERR(&qedi->dbg_ctx,
1925 "UIO init failed, err=%d\n", rc);
1926 goto free_uio;
1927 }
1928
1929 /* host the array on iscsi_conn */
1930 rc = qedi_setup_cid_que(qedi);
1931 if (rc) {
1932 QEDI_ERR(&qedi->dbg_ctx,
1933 "Could not setup cid que\n");
1934 goto free_uio;
1935 }
1936
1937 rc = qedi_cm_alloc_mem(qedi);
1938 if (rc) {
1939 QEDI_ERR(&qedi->dbg_ctx,
1940 "Could not alloc cm memory\n");
1941 goto free_cid_que;
1942 }
1943
1944 rc = qedi_alloc_itt(qedi);
1945 if (rc) {
1946 QEDI_ERR(&qedi->dbg_ctx,
1947 "Could not alloc itt memory\n");
1948 goto free_cid_que;
1949 }
1950
1951 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1952 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
1953 if (!qedi->tmf_thread) {
1954 QEDI_ERR(&qedi->dbg_ctx,
1955 "Unable to start tmf thread!\n");
1956 rc = -ENODEV;
1957 goto free_cid_que;
1958 }
1959
1960 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
1961 qedi->offload_thread = create_workqueue(host_buf);
1962 if (!qedi->offload_thread) {
1963 QEDI_ERR(&qedi->dbg_ctx,
1964 "Unable to start offload thread!\n");
1965 rc = -ENODEV;
1966 goto free_cid_que;
1967 }
1968
1969 /* F/w needs 1st task context memory entry for performance */
1970 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
1971 atomic_set(&qedi->num_offloads, 0);
1972 }
1973
1974 return 0;
1975
1976free_cid_que:
1977 qedi_release_cid_que(qedi);
1978free_uio:
1979 qedi_free_uio(qedi->udev);
1980remove_host:
1981#ifdef CONFIG_DEBUG_FS
1982 qedi_dbg_host_exit(&qedi->dbg_ctx);
1983#endif
1984 iscsi_host_remove(qedi->shost);
1985stop_iscsi_func:
1986 qedi_ops->stop(qedi->cdev);
1987stop_slowpath:
1988 qedi_ops->common->slowpath_stop(qedi->cdev);
1989stop_hw:
1990 qedi_ops->common->remove(qedi->cdev);
1991free_pf_params:
1992 qedi_free_iscsi_pf_param(qedi);
1993free_host:
1994 iscsi_host_free(qedi->shost);
1995exit_probe:
1996 return rc;
1997}
1998
1999static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2000{
2001 return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2002}
2003
2004static void qedi_remove(struct pci_dev *pdev)
2005{
2006 __qedi_remove(pdev, QEDI_MODE_NORMAL);
2007}
2008
2009static struct pci_device_id qedi_pci_tbl[] = {
2010 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
04688525 2011 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
ace7f46b
MR		 2012 { 0 },
2013};
2014MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2015
a98d1a0c
TG		 2016static enum cpuhp_state qedi_cpuhp_state;
2017
ace7f46b
MR		 2018static struct pci_driver qedi_pci_driver = {
2019 .name = QEDI_MODULE_NAME,
2020 .id_table = qedi_pci_tbl,
2021 .probe = qedi_probe,
2022 .remove = qedi_remove,
2023};
2024
2025static int __init qedi_init(void)
2026{
ace7f46b 2027 struct qedi_percpu_s *p;
a98d1a0c 2028 int cpu, rc = 0;
ace7f46b
MR		 2029
2030 qedi_ops = qed_get_iscsi_ops();
2031 if (!qedi_ops) {
2032 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
a98d1a0c 2033 return -EINVAL;
ace7f46b
MR		 2034 }
2035
2036#ifdef CONFIG_DEBUG_FS
2037 qedi_dbg_init("qedi");
2038#endif
2039
2040 qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2041 if (!qedi_scsi_transport) {
2042 QEDI_ERR(NULL, "Could not register qedi transport");
2043 rc = -ENOMEM;
2044 goto exit_qedi_init_1;
2045 }
2046
ace7f46b
MR		 2047 for_each_possible_cpu(cpu) {
2048 p = &per_cpu(qedi_percpu, cpu);
2049 INIT_LIST_HEAD(&p->work_list);
2050 spin_lock_init(&p->p_work_lock);
2051 p->iothread = NULL;
2052 }
2053
a98d1a0c
TG		 2054 rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2055 qedi_cpu_online, qedi_cpu_offline);
2056 if (rc < 0)
2057 goto exit_qedi_init_2;
2058 qedi_cpuhp_state = rc;
ace7f46b 2059
a98d1a0c
TG		 2060 rc = pci_register_driver(&qedi_pci_driver);
2061 if (rc) {
2062 QEDI_ERR(NULL, "Failed to register driver\n");
2063 goto exit_qedi_hp;
2064 }
2065
2066 return 0;
ace7f46b 2067
a98d1a0c
TG		 2068exit_qedi_hp:
2069 cpuhp_remove_state(qedi_cpuhp_state);
ace7f46b
MR		 2070exit_qedi_init_2:
2071 iscsi_unregister_transport(&qedi_iscsi_transport);
2072exit_qedi_init_1:
2073#ifdef CONFIG_DEBUG_FS
2074 qedi_dbg_exit();
2075#endif
2076 qed_put_iscsi_ops();
ace7f46b
MR		 2077 return rc;
2078}
2079
2080static void __exit qedi_cleanup(void)
2081{
ace7f46b 2082 pci_unregister_driver(&qedi_pci_driver);
a98d1a0c 2083 cpuhp_remove_state(qedi_cpuhp_state);
ace7f46b
MR		 2084 iscsi_unregister_transport(&qedi_iscsi_transport);
2085
2086#ifdef CONFIG_DEBUG_FS
2087 qedi_dbg_exit();
2088#endif
2089 qed_put_iscsi_ops();
2090}
2091
2092MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2093MODULE_LICENSE("GPL");
2094MODULE_AUTHOR("QLogic Corporation");
2095MODULE_VERSION(QEDI_MODULE_VERSION);
2096module_init(qedi_init);
2097module_exit(qedi_cleanup);
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