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sh_eth: R8A7740 supports packet shecksumming
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_main.c
blob5eda21d903e93dfc96702552d2de9deb7f01c734
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
33 static uint qedi_fw_debug;
34 module_param(qedi_fw_debug, uint, 0644);
35 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
36
37 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
38 module_param(qedi_dbg_log, uint, 0644);
39 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
40
41 uint qedi_io_tracing;
42 module_param(qedi_io_tracing, uint, 0644);
43 MODULE_PARM_DESC(qedi_io_tracing,
44 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
45
46 const struct qed_iscsi_ops *qedi_ops;
47 static struct scsi_transport_template *qedi_scsi_transport;
48 static struct pci_driver qedi_pci_driver;
49 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
50 static LIST_HEAD(qedi_udev_list);
51 /* Static function declaration */
52 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
53 static void qedi_free_global_queues(struct qedi_ctx *qedi);
54 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
55 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
56 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
57
58 static 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
121 static 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
141 static 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
152 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
153 {
154 if (udev->ll2_ring) {
155 free_page((unsigned long)udev->ll2_ring);
156 udev->ll2_ring = NULL;
157 }
158
159 if (udev->ll2_buf) {
160 free_pages((unsigned long)udev->ll2_buf, 2);
161 udev->ll2_buf = NULL;
162 }
163 }
164
165 static void __qedi_free_uio(struct qedi_uio_dev *udev)
166 {
167 uio_unregister_device(&udev->qedi_uinfo);
168
169 __qedi_free_uio_rings(udev);
170
171 pci_dev_put(udev->pdev);
172 kfree(udev->uctrl);
173 kfree(udev);
174 }
175
176 static void qedi_free_uio(struct qedi_uio_dev *udev)
177 {
178 if (!udev)
179 return;
180
181 list_del_init(&udev->list);
182 __qedi_free_uio(udev);
183 }
184
185 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
186 {
187 struct qedi_ctx *qedi = NULL;
188 struct qedi_uio_ctrl *uctrl = NULL;
189
190 qedi = udev->qedi;
191 uctrl = udev->uctrl;
192
193 spin_lock_bh(&qedi->ll2_lock);
194 uctrl->host_rx_cons = 0;
195 uctrl->hw_rx_prod = 0;
196 uctrl->hw_rx_bd_prod = 0;
197 uctrl->host_rx_bd_cons = 0;
198
199 memset(udev->ll2_ring, 0, udev->ll2_ring_size);
200 memset(udev->ll2_buf, 0, udev->ll2_buf_size);
201 spin_unlock_bh(&qedi->ll2_lock);
202 }
203
204 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
205 {
206 int rc = 0;
207
208 if (udev->ll2_ring || udev->ll2_buf)
209 return rc;
210
211 /* Allocating memory for LL2 ring */
212 udev->ll2_ring_size = QEDI_PAGE_SIZE;
213 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
214 if (!udev->ll2_ring) {
215 rc = -ENOMEM;
216 goto exit_alloc_ring;
217 }
218
219 /* Allocating memory for Tx/Rx pkt buffer */
220 udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
221 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
222 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
223 __GFP_ZERO, 2);
224 if (!udev->ll2_buf) {
225 rc = -ENOMEM;
226 goto exit_alloc_buf;
227 }
228 return rc;
229
230 exit_alloc_buf:
231 free_page((unsigned long)udev->ll2_ring);
232 udev->ll2_ring = NULL;
233 exit_alloc_ring:
234 return rc;
235 }
236
237 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
238 {
239 struct qedi_uio_dev *udev = NULL;
240 struct qedi_uio_ctrl *uctrl = NULL;
241 int rc = 0;
242
243 list_for_each_entry(udev, &qedi_udev_list, list) {
244 if (udev->pdev == qedi->pdev) {
245 udev->qedi = qedi;
246 if (__qedi_alloc_uio_rings(udev)) {
247 udev->qedi = NULL;
248 return -ENOMEM;
249 }
250 qedi->udev = udev;
251 return 0;
252 }
253 }
254
255 udev = kzalloc(sizeof(*udev), GFP_KERNEL);
256 if (!udev) {
257 rc = -ENOMEM;
258 goto err_udev;
259 }
260
261 uctrl = kzalloc(sizeof(*uctrl), GFP_KERNEL);
262 if (!uctrl) {
263 rc = -ENOMEM;
264 goto err_uctrl;
265 }
266
267 udev->uio_dev = -1;
268
269 udev->qedi = qedi;
270 udev->pdev = qedi->pdev;
271 udev->uctrl = uctrl;
272
273 rc = __qedi_alloc_uio_rings(udev);
274 if (rc)
275 goto err_uio_rings;
276
277 list_add(&udev->list, &qedi_udev_list);
278
279 pci_dev_get(udev->pdev);
280 qedi->udev = udev;
281
282 udev->tx_pkt = udev->ll2_buf;
283 udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
284 return 0;
285
286 err_uio_rings:
287 kfree(uctrl);
288 err_uctrl:
289 kfree(udev);
290 err_udev:
291 return -ENOMEM;
292 }
293
294 static int qedi_init_uio(struct qedi_ctx *qedi)
295 {
296 struct qedi_uio_dev *udev = qedi->udev;
297 struct uio_info *uinfo;
298 int ret = 0;
299
300 if (!udev)
301 return -ENOMEM;
302
303 uinfo = &udev->qedi_uinfo;
304
305 uinfo->mem[0].addr = (unsigned long)udev->uctrl;
306 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
307 uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
308
309 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
310 uinfo->mem[1].size = udev->ll2_ring_size;
311 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
312
313 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
314 uinfo->mem[2].size = udev->ll2_buf_size;
315 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
316
317 uinfo->name = "qedi_uio";
318 uinfo->version = QEDI_MODULE_VERSION;
319 uinfo->irq = UIO_IRQ_CUSTOM;
320
321 uinfo->open = qedi_uio_open;
322 uinfo->release = qedi_uio_close;
323
324 if (udev->uio_dev == -1) {
325 if (!uinfo->priv) {
326 uinfo->priv = udev;
327
328 ret = uio_register_device(&udev->pdev->dev, uinfo);
329 if (ret) {
330 QEDI_ERR(&qedi->dbg_ctx,
331 "UIO registration failed\n");
332 }
333 }
334 }
335
336 return ret;
337 }
338
339 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
340 struct qed_sb_info *sb_info, u16 sb_id)
341 {
342 struct status_block *sb_virt;
343 dma_addr_t sb_phys;
344 int ret;
345
346 sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
347 sizeof(struct status_block), &sb_phys,
348 GFP_KERNEL);
349 if (!sb_virt) {
350 QEDI_ERR(&qedi->dbg_ctx,
351 "Status block allocation failed for id = %d.\n",
352 sb_id);
353 return -ENOMEM;
354 }
355
356 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
357 sb_id, QED_SB_TYPE_STORAGE);
358 if (ret) {
359 QEDI_ERR(&qedi->dbg_ctx,
360 "Status block initialization failed for id = %d.\n",
361 sb_id);
362 return ret;
363 }
364
365 return 0;
366 }
367
368 static void qedi_free_sb(struct qedi_ctx *qedi)
369 {
370 struct qed_sb_info *sb_info;
371 int id;
372
373 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
374 sb_info = &qedi->sb_array[id];
375 if (sb_info->sb_virt)
376 dma_free_coherent(&qedi->pdev->dev,
377 sizeof(*sb_info->sb_virt),
378 (void *)sb_info->sb_virt,
379 sb_info->sb_phys);
380 }
381 }
382
383 static void qedi_free_fp(struct qedi_ctx *qedi)
384 {
385 kfree(qedi->fp_array);
386 kfree(qedi->sb_array);
387 }
388
389 static void qedi_destroy_fp(struct qedi_ctx *qedi)
390 {
391 qedi_free_sb(qedi);
392 qedi_free_fp(qedi);
393 }
394
395 static int qedi_alloc_fp(struct qedi_ctx *qedi)
396 {
397 int ret = 0;
398
399 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
400 sizeof(struct qedi_fastpath), GFP_KERNEL);
401 if (!qedi->fp_array) {
402 QEDI_ERR(&qedi->dbg_ctx,
403 "fastpath fp array allocation failed.\n");
404 return -ENOMEM;
405 }
406
407 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
408 sizeof(struct qed_sb_info), GFP_KERNEL);
409 if (!qedi->sb_array) {
410 QEDI_ERR(&qedi->dbg_ctx,
411 "fastpath sb array allocation failed.\n");
412 ret = -ENOMEM;
413 goto free_fp;
414 }
415
416 return ret;
417
418 free_fp:
419 qedi_free_fp(qedi);
420 return ret;
421 }
422
423 static void qedi_int_fp(struct qedi_ctx *qedi)
424 {
425 struct qedi_fastpath *fp;
426 int id;
427
428 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
429 sizeof(*qedi->fp_array));
430 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
431 sizeof(*qedi->sb_array));
432
433 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
434 fp = &qedi->fp_array[id];
435 fp->sb_info = &qedi->sb_array[id];
436 fp->sb_id = id;
437 fp->qedi = qedi;
438 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
439 "qedi", id);
440
441 /* fp_array[i] ---- irq cookie
442 * So init data which is needed in int ctx
443 */
444 }
445 }
446
447 static int qedi_prepare_fp(struct qedi_ctx *qedi)
448 {
449 struct qedi_fastpath *fp;
450 int id, ret = 0;
451
452 ret = qedi_alloc_fp(qedi);
453 if (ret)
454 goto err;
455
456 qedi_int_fp(qedi);
457
458 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
459 fp = &qedi->fp_array[id];
460 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
461 if (ret) {
462 QEDI_ERR(&qedi->dbg_ctx,
463 "SB allocation and initialization failed.\n");
464 ret = -EIO;
465 goto err_init;
466 }
467 }
468
469 return 0;
470
471 err_init:
472 qedi_free_sb(qedi);
473 qedi_free_fp(qedi);
474 err:
475 return ret;
476 }
477
478 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
479 {
480 int i;
481
482 qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
483 sizeof(u32), GFP_KERNEL);
484 if (!qedi->cid_que.cid_que_base)
485 return -ENOMEM;
486
487 qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
488 sizeof(struct qedi_conn *),
489 GFP_KERNEL);
490 if (!qedi->cid_que.conn_cid_tbl) {
491 kfree(qedi->cid_que.cid_que_base);
492 qedi->cid_que.cid_que_base = NULL;
493 return -ENOMEM;
494 }
495
496 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
497 qedi->cid_que.cid_q_prod_idx = 0;
498 qedi->cid_que.cid_q_cons_idx = 0;
499 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
500 qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
501
502 for (i = 0; i < qedi->max_active_conns; i++) {
503 qedi->cid_que.cid_que[i] = i;
504 qedi->cid_que.conn_cid_tbl[i] = NULL;
505 }
506
507 return 0;
508 }
509
510 static void qedi_release_cid_que(struct qedi_ctx *qedi)
511 {
512 kfree(qedi->cid_que.cid_que_base);
513 qedi->cid_que.cid_que_base = NULL;
514
515 kfree(qedi->cid_que.conn_cid_tbl);
516 qedi->cid_que.conn_cid_tbl = NULL;
517 }
518
519 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
520 u16 start_id, u16 next)
521 {
522 id_tbl->start = start_id;
523 id_tbl->max = size;
524 id_tbl->next = next;
525 spin_lock_init(&id_tbl->lock);
526 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
527 if (!id_tbl->table)
528 return -ENOMEM;
529
530 return 0;
531 }
532
533 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
534 {
535 kfree(id_tbl->table);
536 id_tbl->table = NULL;
537 }
538
539 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
540 {
541 int ret = -1;
542
543 id -= id_tbl->start;
544 if (id >= id_tbl->max)
545 return ret;
546
547 spin_lock(&id_tbl->lock);
548 if (!test_bit(id, id_tbl->table)) {
549 set_bit(id, id_tbl->table);
550 ret = 0;
551 }
552 spin_unlock(&id_tbl->lock);
553 return ret;
554 }
555
556 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
557 {
558 u16 id;
559
560 spin_lock(&id_tbl->lock);
561 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
562 if (id >= id_tbl->max) {
563 id = QEDI_LOCAL_PORT_INVALID;
564 if (id_tbl->next != 0) {
565 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
566 if (id >= id_tbl->next)
567 id = QEDI_LOCAL_PORT_INVALID;
568 }
569 }
570
571 if (id < id_tbl->max) {
572 set_bit(id, id_tbl->table);
573 id_tbl->next = (id + 1) & (id_tbl->max - 1);
574 id += id_tbl->start;
575 }
576
577 spin_unlock(&id_tbl->lock);
578
579 return id;
580 }
581
582 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
583 {
584 if (id == QEDI_LOCAL_PORT_INVALID)
585 return;
586
587 id -= id_tbl->start;
588 if (id >= id_tbl->max)
589 return;
590
591 clear_bit(id, id_tbl->table);
592 }
593
594 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
595 {
596 kfree(qedi->ep_tbl);
597 qedi->ep_tbl = NULL;
598 qedi_free_id_tbl(&qedi->lcl_port_tbl);
599 }
600
601 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
602 {
603 u16 port_id;
604
605 qedi->ep_tbl = kzalloc((qedi->max_active_conns *
606 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
607 if (!qedi->ep_tbl)
608 return -ENOMEM;
609 port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
610 if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
611 QEDI_LOCAL_PORT_MIN, port_id)) {
612 qedi_cm_free_mem(qedi);
613 return -ENOMEM;
614 }
615
616 return 0;
617 }
618
619 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
620 {
621 struct Scsi_Host *shost;
622 struct qedi_ctx *qedi = NULL;
623
624 shost = iscsi_host_alloc(&qedi_host_template,
625 sizeof(struct qedi_ctx), 0);
626 if (!shost) {
627 QEDI_ERR(NULL, "Could not allocate shost\n");
628 goto exit_setup_shost;
629 }
630
631 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
632 shost->max_channel = 0;
633 shost->max_lun = ~0;
634 shost->max_cmd_len = 16;
635 shost->transportt = qedi_scsi_transport;
636
637 qedi = iscsi_host_priv(shost);
638 memset(qedi, 0, sizeof(*qedi));
639 qedi->shost = shost;
640 qedi->dbg_ctx.host_no = shost->host_no;
641 qedi->pdev = pdev;
642 qedi->dbg_ctx.pdev = pdev;
643 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
644 qedi->max_sqes = QEDI_SQ_SIZE;
645
646 if (shost_use_blk_mq(shost))
647 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
648
649 pci_set_drvdata(pdev, qedi);
650
651 exit_setup_shost:
652 return qedi;
653 }
654
655 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
656 {
657 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
658 struct qedi_uio_dev *udev;
659 struct qedi_uio_ctrl *uctrl;
660 struct skb_work_list *work;
661 u32 prod;
662
663 if (!qedi) {
664 QEDI_ERR(NULL, "qedi is NULL\n");
665 return -1;
666 }
667
668 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
669 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
670 "UIO DEV is not opened\n");
671 kfree_skb(skb);
672 return 0;
673 }
674
675 udev = qedi->udev;
676 uctrl = udev->uctrl;
677
678 work = kzalloc(sizeof(*work), GFP_ATOMIC);
679 if (!work) {
680 QEDI_WARN(&qedi->dbg_ctx,
681 "Could not allocate work so dropping frame.\n");
682 kfree_skb(skb);
683 return 0;
684 }
685
686 INIT_LIST_HEAD(&work->list);
687 work->skb = skb;
688
689 if (skb_vlan_tag_present(skb))
690 work->vlan_id = skb_vlan_tag_get(skb);
691
692 if (work->vlan_id)
693 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
694
695 spin_lock_bh(&qedi->ll2_lock);
696 list_add_tail(&work->list, &qedi->ll2_skb_list);
697
698 ++uctrl->hw_rx_prod_cnt;
699 prod = (uctrl->hw_rx_prod + 1) % RX_RING;
700 if (prod != uctrl->host_rx_cons) {
701 uctrl->hw_rx_prod = prod;
702 spin_unlock_bh(&qedi->ll2_lock);
703 wake_up_process(qedi->ll2_recv_thread);
704 return 0;
705 }
706
707 spin_unlock_bh(&qedi->ll2_lock);
708 return 0;
709 }
710
711 /* map this skb to iscsiuio mmaped region */
712 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
713 u16 vlan_id)
714 {
715 struct qedi_uio_dev *udev = NULL;
716 struct qedi_uio_ctrl *uctrl = NULL;
717 struct qedi_rx_bd rxbd;
718 struct qedi_rx_bd *p_rxbd;
719 u32 rx_bd_prod;
720 void *pkt;
721 int len = 0;
722
723 if (!qedi) {
724 QEDI_ERR(NULL, "qedi is NULL\n");
725 return -1;
726 }
727
728 udev = qedi->udev;
729 uctrl = udev->uctrl;
730 pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
731 len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
732 memcpy(pkt, skb->data, len);
733
734 memset(&rxbd, 0, sizeof(rxbd));
735 rxbd.rx_pkt_index = uctrl->hw_rx_prod;
736 rxbd.rx_pkt_len = len;
737 rxbd.vlan_id = vlan_id;
738
739 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
740 rx_bd_prod = uctrl->hw_rx_bd_prod;
741 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
742 p_rxbd += rx_bd_prod;
743
744 memcpy(p_rxbd, &rxbd, sizeof(rxbd));
745
746 /* notify the iscsiuio about new packet */
747 uio_event_notify(&udev->qedi_uinfo);
748
749 return 0;
750 }
751
752 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
753 {
754 struct skb_work_list *work, *work_tmp;
755
756 spin_lock_bh(&qedi->ll2_lock);
757 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
758 list_del(&work->list);
759 if (work->skb)
760 kfree_skb(work->skb);
761 kfree(work);
762 }
763 spin_unlock_bh(&qedi->ll2_lock);
764 }
765
766 static int qedi_ll2_recv_thread(void *arg)
767 {
768 struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
769 struct skb_work_list *work, *work_tmp;
770
771 set_user_nice(current, -20);
772
773 while (!kthread_should_stop()) {
774 spin_lock_bh(&qedi->ll2_lock);
775 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
776 list) {
777 list_del(&work->list);
778 qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
779 kfree_skb(work->skb);
780 kfree(work);
781 }
782 set_current_state(TASK_INTERRUPTIBLE);
783 spin_unlock_bh(&qedi->ll2_lock);
784 schedule();
785 }
786
787 __set_current_state(TASK_RUNNING);
788 return 0;
789 }
790
791 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
792 {
793 u8 num_sq_pages;
794 u32 log_page_size;
795 int rval = 0;
796
797 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "Min number of MSIX %d\n",
798 MIN_NUM_CPUS_MSIX(qedi));
799
800 num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
801
802 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
803
804 memset(&qedi->pf_params.iscsi_pf_params, 0,
805 sizeof(qedi->pf_params.iscsi_pf_params));
806
807 qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
808 qedi->num_queues * sizeof(struct qedi_glbl_q_params),
809 &qedi->hw_p_cpuq);
810 if (!qedi->p_cpuq) {
811 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
812 rval = -1;
813 goto err_alloc_mem;
814 }
815
816 rval = qedi_alloc_global_queues(qedi);
817 if (rval) {
818 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
819 rval = -1;
820 goto err_alloc_mem;
821 }
822
823 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
824 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
825 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
826 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
827 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
828 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
829 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
830 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
831
832 for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
833 if ((1 << log_page_size) == PAGE_SIZE)
834 break;
835 }
836 qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
837
838 qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
839 (u64)qedi->hw_p_cpuq;
840
841 /* RQ BDQ initializations.
842 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
843 * rqe_log_size: 8 for 256B RQE
844 */
845 qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
846 /* BDQ address and size */
847 qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
848 qedi->bdq_pbl_list_dma;
849 qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
850 qedi->bdq_pbl_list_num_entries;
851 qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
852
853 /* cq_num_entries: num_tasks + rq_num_entries */
854 qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
855
856 qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
857 qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
858 qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
859
860 err_alloc_mem:
861 return rval;
862 }
863
864 /* Free DMA coherent memory for array of queue pointers we pass to qed */
865 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
866 {
867 size_t size = 0;
868
869 if (qedi->p_cpuq) {
870 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
871 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
872 qedi->hw_p_cpuq);
873 }
874
875 qedi_free_global_queues(qedi);
876
877 kfree(qedi->global_queues);
878 }
879
880 static void qedi_link_update(void *dev, struct qed_link_output *link)
881 {
882 struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
883
884 if (link->link_up) {
885 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
886 atomic_set(&qedi->link_state, QEDI_LINK_UP);
887 } else {
888 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
889 "Link Down event.\n");
890 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
891 }
892 }
893
894 static struct qed_iscsi_cb_ops qedi_cb_ops = {
895 {
896 .link_update = qedi_link_update,
897 }
898 };
899
900 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
901 u16 que_idx, struct qedi_percpu_s *p)
902 {
903 struct qedi_work *qedi_work;
904 struct qedi_conn *q_conn;
905 struct iscsi_conn *conn;
906 struct qedi_cmd *qedi_cmd;
907 u32 iscsi_cid;
908 int rc = 0;
909
910 iscsi_cid = cqe->cqe_common.conn_id;
911 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
912 if (!q_conn) {
913 QEDI_WARN(&qedi->dbg_ctx,
914 "Session no longer exists for cid=0x%x!!\n",
915 iscsi_cid);
916 return -1;
917 }
918 conn = q_conn->cls_conn->dd_data;
919
920 switch (cqe->cqe_common.cqe_type) {
921 case ISCSI_CQE_TYPE_SOLICITED:
922 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
923 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
924 if (!qedi_cmd) {
925 rc = -1;
926 break;
927 }
928 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
929 qedi_cmd->cqe_work.qedi = qedi;
930 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
931 qedi_cmd->cqe_work.que_idx = que_idx;
932 qedi_cmd->cqe_work.is_solicited = true;
933 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
934 break;
935 case ISCSI_CQE_TYPE_UNSOLICITED:
936 case ISCSI_CQE_TYPE_DUMMY:
937 case ISCSI_CQE_TYPE_TASK_CLEANUP:
938 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
939 if (!qedi_work) {
940 rc = -1;
941 break;
942 }
943 INIT_LIST_HEAD(&qedi_work->list);
944 qedi_work->qedi = qedi;
945 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
946 qedi_work->que_idx = que_idx;
947 qedi_work->is_solicited = false;
948 list_add_tail(&qedi_work->list, &p->work_list);
949 break;
950 default:
951 rc = -1;
952 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
953 }
954 return rc;
955 }
956
957 static bool qedi_process_completions(struct qedi_fastpath *fp)
958 {
959 struct qedi_ctx *qedi = fp->qedi;
960 struct qed_sb_info *sb_info = fp->sb_info;
961 struct status_block *sb = sb_info->sb_virt;
962 struct qedi_percpu_s *p = NULL;
963 struct global_queue *que;
964 u16 prod_idx;
965 unsigned long flags;
966 union iscsi_cqe *cqe;
967 int cpu;
968 int ret;
969
970 /* Get the current firmware producer index */
971 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
972
973 if (prod_idx >= QEDI_CQ_SIZE)
974 prod_idx = prod_idx % QEDI_CQ_SIZE;
975
976 que = qedi->global_queues[fp->sb_id];
977 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
978 "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
979 que, prod_idx, que->cq_cons_idx, fp->sb_id);
980
981 qedi->intr_cpu = fp->sb_id;
982 cpu = smp_processor_id();
983 p = &per_cpu(qedi_percpu, cpu);
984
985 if (unlikely(!p->iothread))
986 WARN_ON(1);
987
988 spin_lock_irqsave(&p->p_work_lock, flags);
989 while (que->cq_cons_idx != prod_idx) {
990 cqe = &que->cq[que->cq_cons_idx];
991
992 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
993 "cqe=%p prod_idx=%d cons_idx=%d.\n",
994 cqe, prod_idx, que->cq_cons_idx);
995
996 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
997 if (ret)
998 continue;
999
1000 que->cq_cons_idx++;
1001 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1002 que->cq_cons_idx = 0;
1003 }
1004 wake_up_process(p->iothread);
1005 spin_unlock_irqrestore(&p->p_work_lock, flags);
1006
1007 return true;
1008 }
1009
1010 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1011 {
1012 struct qedi_ctx *qedi = fp->qedi;
1013 struct global_queue *que;
1014 struct qed_sb_info *sb_info = fp->sb_info;
1015 struct status_block *sb = sb_info->sb_virt;
1016 u16 prod_idx;
1017
1018 barrier();
1019
1020 /* Get the current firmware producer index */
1021 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1022
1023 /* Get the pointer to the global CQ this completion is on */
1024 que = qedi->global_queues[fp->sb_id];
1025
1026 /* prod idx wrap around uint16 */
1027 if (prod_idx >= QEDI_CQ_SIZE)
1028 prod_idx = prod_idx % QEDI_CQ_SIZE;
1029
1030 return (que->cq_cons_idx != prod_idx);
1031 }
1032
1033 /* MSI-X fastpath handler code */
1034 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1035 {
1036 struct qedi_fastpath *fp = dev_id;
1037 struct qedi_ctx *qedi = fp->qedi;
1038 bool wake_io_thread = true;
1039
1040 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1041
1042 process_again:
1043 wake_io_thread = qedi_process_completions(fp);
1044 if (wake_io_thread) {
1045 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1046 "process already running\n");
1047 }
1048
1049 if (qedi_fp_has_work(fp) == 0)
1050 qed_sb_update_sb_idx(fp->sb_info);
1051
1052 /* Check for more work */
1053 rmb();
1054
1055 if (qedi_fp_has_work(fp) == 0)
1056 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1057 else
1058 goto process_again;
1059
1060 return IRQ_HANDLED;
1061 }
1062
1063 /* simd handler for MSI/INTa */
1064 static void qedi_simd_int_handler(void *cookie)
1065 {
1066 /* Cookie is qedi_ctx struct */
1067 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1068
1069 QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1070 }
1071
1072 #define QEDI_SIMD_HANDLER_NUM 0
1073 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1074 {
1075 int i;
1076
1077 if (qedi->int_info.msix_cnt) {
1078 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1079 synchronize_irq(qedi->int_info.msix[i].vector);
1080 irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1081 NULL);
1082 free_irq(qedi->int_info.msix[i].vector,
1083 &qedi->fp_array[i]);
1084 }
1085 } else {
1086 qedi_ops->common->simd_handler_clean(qedi->cdev,
1087 QEDI_SIMD_HANDLER_NUM);
1088 }
1089
1090 qedi->int_info.used_cnt = 0;
1091 qedi_ops->common->set_fp_int(qedi->cdev, 0);
1092 }
1093
1094 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1095 {
1096 int i, rc, cpu;
1097
1098 cpu = cpumask_first(cpu_online_mask);
1099 for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1100 rc = request_irq(qedi->int_info.msix[i].vector,
1101 qedi_msix_handler, 0, "qedi",
1102 &qedi->fp_array[i]);
1103
1104 if (rc) {
1105 QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1106 qedi_sync_free_irqs(qedi);
1107 return rc;
1108 }
1109 qedi->int_info.used_cnt++;
1110 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1111 get_cpu_mask(cpu));
1112 cpu = cpumask_next(cpu, cpu_online_mask);
1113 }
1114
1115 return 0;
1116 }
1117
1118 static int qedi_setup_int(struct qedi_ctx *qedi)
1119 {
1120 int rc = 0;
1121
1122 rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1123 rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1124 if (rc)
1125 goto exit_setup_int;
1126
1127 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1128 "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1129 qedi->int_info.msix_cnt, num_online_cpus());
1130
1131 if (qedi->int_info.msix_cnt) {
1132 rc = qedi_request_msix_irq(qedi);
1133 goto exit_setup_int;
1134 } else {
1135 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1136 QEDI_SIMD_HANDLER_NUM,
1137 qedi_simd_int_handler);
1138 qedi->int_info.used_cnt = 1;
1139 }
1140
1141 exit_setup_int:
1142 return rc;
1143 }
1144
1145 static void qedi_free_bdq(struct qedi_ctx *qedi)
1146 {
1147 int i;
1148
1149 if (qedi->bdq_pbl_list)
1150 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1151 qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1152
1153 if (qedi->bdq_pbl)
1154 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1155 qedi->bdq_pbl, qedi->bdq_pbl_dma);
1156
1157 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1158 if (qedi->bdq[i].buf_addr) {
1159 dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1160 qedi->bdq[i].buf_addr,
1161 qedi->bdq[i].buf_dma);
1162 }
1163 }
1164 }
1165
1166 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1167 {
1168 int i;
1169 struct global_queue **gl = qedi->global_queues;
1170
1171 for (i = 0; i < qedi->num_queues; i++) {
1172 if (!gl[i])
1173 continue;
1174
1175 if (gl[i]->cq)
1176 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1177 gl[i]->cq, gl[i]->cq_dma);
1178 if (gl[i]->cq_pbl)
1179 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1180 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1181
1182 kfree(gl[i]);
1183 }
1184 qedi_free_bdq(qedi);
1185 }
1186
1187 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1188 {
1189 int i;
1190 struct scsi_bd *pbl;
1191 u64 *list;
1192 dma_addr_t page;
1193
1194 /* Alloc dma memory for BDQ buffers */
1195 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1196 qedi->bdq[i].buf_addr =
1197 dma_alloc_coherent(&qedi->pdev->dev,
1198 QEDI_BDQ_BUF_SIZE,
1199 &qedi->bdq[i].buf_dma,
1200 GFP_KERNEL);
1201 if (!qedi->bdq[i].buf_addr) {
1202 QEDI_ERR(&qedi->dbg_ctx,
1203 "Could not allocate BDQ buffer %d.\n", i);
1204 return -ENOMEM;
1205 }
1206 }
1207
1208 /* Alloc dma memory for BDQ page buffer list */
1209 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1210 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1211 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1212
1213 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1214 qedi->rq_num_entries);
1215
1216 qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1217 qedi->bdq_pbl_mem_size,
1218 &qedi->bdq_pbl_dma, GFP_KERNEL);
1219 if (!qedi->bdq_pbl) {
1220 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1221 return -ENOMEM;
1222 }
1223
1224 /*
1225 * Populate BDQ PBL with physical and virtual address of individual
1226 * BDQ buffers
1227 */
1228 pbl = (struct scsi_bd *)qedi->bdq_pbl;
1229 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1230 pbl->address.hi =
1231 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1232 pbl->address.lo =
1233 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1234 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1235 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1236 pbl, pbl->address.hi, pbl->address.lo, i);
1237 pbl->opaque.hi = 0;
1238 pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
1239 pbl++;
1240 }
1241
1242 /* Allocate list of PBL pages */
1243 qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1244 PAGE_SIZE,
1245 &qedi->bdq_pbl_list_dma,
1246 GFP_KERNEL);
1247 if (!qedi->bdq_pbl_list) {
1248 QEDI_ERR(&qedi->dbg_ctx,
1249 "Could not allocate list of PBL pages.\n");
1250 return -ENOMEM;
1251 }
1252 memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
1253
1254 /*
1255 * Now populate PBL list with pages that contain pointers to the
1256 * individual buffers.
1257 */
1258 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1259 list = (u64 *)qedi->bdq_pbl_list;
1260 page = qedi->bdq_pbl_list_dma;
1261 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1262 *list = qedi->bdq_pbl_dma;
1263 list++;
1264 page += PAGE_SIZE;
1265 }
1266
1267 return 0;
1268 }
1269
1270 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1271 {
1272 u32 *list;
1273 int i;
1274 int status = 0, rc;
1275 u32 *pbl;
1276 dma_addr_t page;
1277 int num_pages;
1278
1279 /*
1280 * Number of global queues (CQ / RQ). This should
1281 * be <= number of available MSIX vectors for the PF
1282 */
1283 if (!qedi->num_queues) {
1284 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1285 return 1;
1286 }
1287
1288 /* Make sure we allocated the PBL that will contain the physical
1289 * addresses of our queues
1290 */
1291 if (!qedi->p_cpuq) {
1292 status = 1;
1293 goto mem_alloc_failure;
1294 }
1295
1296 qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1297 qedi->num_queues), GFP_KERNEL);
1298 if (!qedi->global_queues) {
1299 QEDI_ERR(&qedi->dbg_ctx,
1300 "Unable to allocate global queues array ptr memory\n");
1301 return -ENOMEM;
1302 }
1303 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1304 "qedi->global_queues=%p.\n", qedi->global_queues);
1305
1306 /* Allocate DMA coherent buffers for BDQ */
1307 rc = qedi_alloc_bdq(qedi);
1308 if (rc)
1309 goto mem_alloc_failure;
1310
1311 /* Allocate a CQ and an associated PBL for each MSI-X
1312 * vector.
1313 */
1314 for (i = 0; i < qedi->num_queues; i++) {
1315 qedi->global_queues[i] =
1316 kzalloc(sizeof(*qedi->global_queues[0]),
1317 GFP_KERNEL);
1318 if (!qedi->global_queues[i]) {
1319 QEDI_ERR(&qedi->dbg_ctx,
1320 "Unable to allocation global queue %d.\n", i);
1321 goto mem_alloc_failure;
1322 }
1323
1324 qedi->global_queues[i]->cq_mem_size =
1325 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1326 qedi->global_queues[i]->cq_mem_size =
1327 (qedi->global_queues[i]->cq_mem_size +
1328 (QEDI_PAGE_SIZE - 1));
1329
1330 qedi->global_queues[i]->cq_pbl_size =
1331 (qedi->global_queues[i]->cq_mem_size /
1332 QEDI_PAGE_SIZE) * sizeof(void *);
1333 qedi->global_queues[i]->cq_pbl_size =
1334 (qedi->global_queues[i]->cq_pbl_size +
1335 (QEDI_PAGE_SIZE - 1));
1336
1337 qedi->global_queues[i]->cq =
1338 dma_alloc_coherent(&qedi->pdev->dev,
1339 qedi->global_queues[i]->cq_mem_size,
1340 &qedi->global_queues[i]->cq_dma,
1341 GFP_KERNEL);
1342
1343 if (!qedi->global_queues[i]->cq) {
1344 QEDI_WARN(&qedi->dbg_ctx,
1345 "Could not allocate cq.\n");
1346 status = -ENOMEM;
1347 goto mem_alloc_failure;
1348 }
1349 memset(qedi->global_queues[i]->cq, 0,
1350 qedi->global_queues[i]->cq_mem_size);
1351
1352 qedi->global_queues[i]->cq_pbl =
1353 dma_alloc_coherent(&qedi->pdev->dev,
1354 qedi->global_queues[i]->cq_pbl_size,
1355 &qedi->global_queues[i]->cq_pbl_dma,
1356 GFP_KERNEL);
1357
1358 if (!qedi->global_queues[i]->cq_pbl) {
1359 QEDI_WARN(&qedi->dbg_ctx,
1360 "Could not allocate cq PBL.\n");
1361 status = -ENOMEM;
1362 goto mem_alloc_failure;
1363 }
1364 memset(qedi->global_queues[i]->cq_pbl, 0,
1365 qedi->global_queues[i]->cq_pbl_size);
1366
1367 /* Create PBL */
1368 num_pages = qedi->global_queues[i]->cq_mem_size /
1369 QEDI_PAGE_SIZE;
1370 page = qedi->global_queues[i]->cq_dma;
1371 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1372
1373 while (num_pages--) {
1374 *pbl = (u32)page;
1375 pbl++;
1376 *pbl = (u32)((u64)page >> 32);
1377 pbl++;
1378 page += QEDI_PAGE_SIZE;
1379 }
1380 }
1381
1382 list = (u32 *)qedi->p_cpuq;
1383
1384 /*
1385 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1386 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
1387 * to the physical address which contains an array of pointers to the
1388 * physical addresses of the specific queue pages.
1389 */
1390 for (i = 0; i < qedi->num_queues; i++) {
1391 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1392 list++;
1393 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1394 list++;
1395
1396 *list = (u32)0;
1397 list++;
1398 *list = (u32)((u64)0 >> 32);
1399 list++;
1400 }
1401
1402 return 0;
1403
1404 mem_alloc_failure:
1405 qedi_free_global_queues(qedi);
1406 return status;
1407 }
1408
1409 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1410 {
1411 int rval = 0;
1412 u32 *pbl;
1413 dma_addr_t page;
1414 int num_pages;
1415
1416 if (!ep)
1417 return -EIO;
1418
1419 /* Calculate appropriate queue and PBL sizes */
1420 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1421 ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1422
1423 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1424 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1425
1426 ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1427 &ep->sq_dma, GFP_KERNEL);
1428 if (!ep->sq) {
1429 QEDI_WARN(&qedi->dbg_ctx,
1430 "Could not allocate send queue.\n");
1431 rval = -ENOMEM;
1432 goto out;
1433 }
1434 memset(ep->sq, 0, ep->sq_mem_size);
1435
1436 ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1437 &ep->sq_pbl_dma, GFP_KERNEL);
1438 if (!ep->sq_pbl) {
1439 QEDI_WARN(&qedi->dbg_ctx,
1440 "Could not allocate send queue PBL.\n");
1441 rval = -ENOMEM;
1442 goto out_free_sq;
1443 }
1444 memset(ep->sq_pbl, 0, ep->sq_pbl_size);
1445
1446 /* Create PBL */
1447 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1448 page = ep->sq_dma;
1449 pbl = (u32 *)ep->sq_pbl;
1450
1451 while (num_pages--) {
1452 *pbl = (u32)page;
1453 pbl++;
1454 *pbl = (u32)((u64)page >> 32);
1455 pbl++;
1456 page += QEDI_PAGE_SIZE;
1457 }
1458
1459 return rval;
1460
1461 out_free_sq:
1462 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1463 ep->sq_dma);
1464 out:
1465 return rval;
1466 }
1467
1468 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1469 {
1470 if (ep->sq_pbl)
1471 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1472 ep->sq_pbl_dma);
1473 if (ep->sq)
1474 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1475 ep->sq_dma);
1476 }
1477
1478 int qedi_get_task_idx(struct qedi_ctx *qedi)
1479 {
1480 s16 tmp_idx;
1481
1482 again:
1483 tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1484 MAX_ISCSI_TASK_ENTRIES);
1485
1486 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1487 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1488 tmp_idx = -1;
1489 goto err_idx;
1490 }
1491
1492 if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1493 goto again;
1494
1495 err_idx:
1496 return tmp_idx;
1497 }
1498
1499 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1500 {
1501 if (!test_and_clear_bit(idx, qedi->task_idx_map)) {
1502 QEDI_ERR(&qedi->dbg_ctx,
1503 "FW task context, already cleared, tid=0x%x\n", idx);
1504 WARN_ON(1);
1505 }
1506 }
1507
1508 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1509 struct qedi_cmd *cmd)
1510 {
1511 qedi->itt_map[tid].itt = proto_itt;
1512 qedi->itt_map[tid].p_cmd = cmd;
1513
1514 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1515 "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1516 qedi->itt_map[tid].itt);
1517 }
1518
1519 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1520 {
1521 u16 i;
1522
1523 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1524 if (qedi->itt_map[i].itt == itt) {
1525 *tid = i;
1526 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1527 "Ref itt=0x%x, found at tid=0x%x\n",
1528 itt, *tid);
1529 return;
1530 }
1531 }
1532
1533 WARN_ON(1);
1534 }
1535
1536 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1537 {
1538 *proto_itt = qedi->itt_map[tid].itt;
1539 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1540 "Get itt map tid [0x%x with proto itt[0x%x]",
1541 tid, *proto_itt);
1542 }
1543
1544 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1545 {
1546 struct qedi_cmd *cmd = NULL;
1547
1548 if (tid > MAX_ISCSI_TASK_ENTRIES)
1549 return NULL;
1550
1551 cmd = qedi->itt_map[tid].p_cmd;
1552 if (cmd->task_id != tid)
1553 return NULL;
1554
1555 qedi->itt_map[tid].p_cmd = NULL;
1556
1557 return cmd;
1558 }
1559
1560 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1561 {
1562 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1563 sizeof(struct qedi_itt_map), GFP_KERNEL);
1564 if (!qedi->itt_map) {
1565 QEDI_ERR(&qedi->dbg_ctx,
1566 "Unable to allocate itt map array memory\n");
1567 return -ENOMEM;
1568 }
1569 return 0;
1570 }
1571
1572 static void qedi_free_itt(struct qedi_ctx *qedi)
1573 {
1574 kfree(qedi->itt_map);
1575 }
1576
1577 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1578 .rx_cb = qedi_ll2_rx,
1579 .tx_cb = NULL,
1580 };
1581
1582 static int qedi_percpu_io_thread(void *arg)
1583 {
1584 struct qedi_percpu_s *p = arg;
1585 struct qedi_work *work, *tmp;
1586 unsigned long flags;
1587 LIST_HEAD(work_list);
1588
1589 set_user_nice(current, -20);
1590
1591 while (!kthread_should_stop()) {
1592 spin_lock_irqsave(&p->p_work_lock, flags);
1593 while (!list_empty(&p->work_list)) {
1594 list_splice_init(&p->work_list, &work_list);
1595 spin_unlock_irqrestore(&p->p_work_lock, flags);
1596
1597 list_for_each_entry_safe(work, tmp, &work_list, list) {
1598 list_del_init(&work->list);
1599 qedi_fp_process_cqes(work);
1600 if (!work->is_solicited)
1601 kfree(work);
1602 }
1603 cond_resched();
1604 spin_lock_irqsave(&p->p_work_lock, flags);
1605 }
1606 set_current_state(TASK_INTERRUPTIBLE);
1607 spin_unlock_irqrestore(&p->p_work_lock, flags);
1608 schedule();
1609 }
1610 __set_current_state(TASK_RUNNING);
1611
1612 return 0;
1613 }
1614
1615 static int qedi_cpu_online(unsigned int cpu)
1616 {
1617 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1618 struct task_struct *thread;
1619
1620 thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1621 cpu_to_node(cpu),
1622 "qedi_thread/%d", cpu);
1623 if (IS_ERR(thread))
1624 return PTR_ERR(thread);
1625
1626 kthread_bind(thread, cpu);
1627 p->iothread = thread;
1628 wake_up_process(thread);
1629 return 0;
1630 }
1631
1632 static int qedi_cpu_offline(unsigned int cpu)
1633 {
1634 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1635 struct qedi_work *work, *tmp;
1636 struct task_struct *thread;
1637
1638 spin_lock_bh(&p->p_work_lock);
1639 thread = p->iothread;
1640 p->iothread = NULL;
1641
1642 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1643 list_del_init(&work->list);
1644 qedi_fp_process_cqes(work);
1645 if (!work->is_solicited)
1646 kfree(work);
1647 }
1648
1649 spin_unlock_bh(&p->p_work_lock);
1650 if (thread)
1651 kthread_stop(thread);
1652 return 0;
1653 }
1654
1655 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1656 {
1657 struct qed_ll2_params params;
1658
1659 qedi_recover_all_conns(qedi);
1660
1661 qedi_ops->ll2->stop(qedi->cdev);
1662 qedi_ll2_free_skbs(qedi);
1663
1664 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1665 qedi->ll2_mtu, mtu);
1666 memset(&params, 0, sizeof(params));
1667 qedi->ll2_mtu = mtu;
1668 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1669 params.drop_ttl0_packets = 0;
1670 params.rx_vlan_stripping = 1;
1671 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1672 qedi_ops->ll2->start(qedi->cdev, &params);
1673 }
1674
1675 static void __qedi_remove(struct pci_dev *pdev, int mode)
1676 {
1677 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
1678
1679 if (qedi->tmf_thread) {
1680 flush_workqueue(qedi->tmf_thread);
1681 destroy_workqueue(qedi->tmf_thread);
1682 qedi->tmf_thread = NULL;
1683 }
1684
1685 if (qedi->offload_thread) {
1686 flush_workqueue(qedi->offload_thread);
1687 destroy_workqueue(qedi->offload_thread);
1688 qedi->offload_thread = NULL;
1689 }
1690
1691 #ifdef CONFIG_DEBUG_FS
1692 qedi_dbg_host_exit(&qedi->dbg_ctx);
1693 #endif
1694 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
1695 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1696
1697 qedi_sync_free_irqs(qedi);
1698
1699 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1700 qedi_ops->stop(qedi->cdev);
1701 qedi_ops->ll2->stop(qedi->cdev);
1702 }
1703
1704 if (mode == QEDI_MODE_NORMAL)
1705 qedi_free_iscsi_pf_param(qedi);
1706
1707 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1708 qedi_ops->common->slowpath_stop(qedi->cdev);
1709 qedi_ops->common->remove(qedi->cdev);
1710 }
1711
1712 qedi_destroy_fp(qedi);
1713
1714 if (mode == QEDI_MODE_NORMAL) {
1715 qedi_release_cid_que(qedi);
1716 qedi_cm_free_mem(qedi);
1717 qedi_free_uio(qedi->udev);
1718 qedi_free_itt(qedi);
1719
1720 iscsi_host_remove(qedi->shost);
1721 iscsi_host_free(qedi->shost);
1722
1723 if (qedi->ll2_recv_thread) {
1724 kthread_stop(qedi->ll2_recv_thread);
1725 qedi->ll2_recv_thread = NULL;
1726 }
1727 qedi_ll2_free_skbs(qedi);
1728 }
1729 }
1730
1731 static int __qedi_probe(struct pci_dev *pdev, int mode)
1732 {
1733 struct qedi_ctx *qedi;
1734 struct qed_ll2_params params;
1735 u32 dp_module = 0;
1736 u8 dp_level = 0;
1737 bool is_vf = false;
1738 char host_buf[16];
1739 struct qed_link_params link_params;
1740 struct qed_slowpath_params sp_params;
1741 struct qed_probe_params qed_params;
1742 void *task_start, *task_end;
1743 int rc;
1744 u16 tmp;
1745
1746 if (mode != QEDI_MODE_RECOVERY) {
1747 qedi = qedi_host_alloc(pdev);
1748 if (!qedi) {
1749 rc = -ENOMEM;
1750 goto exit_probe;
1751 }
1752 } else {
1753 qedi = pci_get_drvdata(pdev);
1754 }
1755
1756 memset(&qed_params, 0, sizeof(qed_params));
1757 qed_params.protocol = QED_PROTOCOL_ISCSI;
1758 qed_params.dp_module = dp_module;
1759 qed_params.dp_level = dp_level;
1760 qed_params.is_vf = is_vf;
1761 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
1762 if (!qedi->cdev) {
1763 rc = -ENODEV;
1764 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
1765 goto free_host;
1766 }
1767
1768 qedi->msix_count = MAX_NUM_MSIX_PF;
1769 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1770
1771 if (mode != QEDI_MODE_RECOVERY) {
1772 rc = qedi_set_iscsi_pf_param(qedi);
1773 if (rc) {
1774 rc = -ENOMEM;
1775 QEDI_ERR(&qedi->dbg_ctx,
1776 "Set iSCSI pf param fail\n");
1777 goto free_host;
1778 }
1779 }
1780
1781 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1782
1783 rc = qedi_prepare_fp(qedi);
1784 if (rc) {
1785 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
1786 goto free_pf_params;
1787 }
1788
1789 /* Start the Slowpath-process */
1790 memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
1791 sp_params.int_mode = QED_INT_MODE_MSIX;
1792 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
1793 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
1794 sp_params.drv_rev = QEDI_DRIVER_REV_VER;
1795 sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
1796 strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
1797 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
1798 if (rc) {
1799 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
1800 goto stop_hw;
1801 }
1802
1803 /* update_pf_params needs to be called before and after slowpath
1804 * start
1805 */
1806 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1807
1808 qedi_setup_int(qedi);
1809 if (rc)
1810 goto stop_iscsi_func;
1811
1812 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1813
1814 /* Learn information crucial for qedi to progress */
1815 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
1816 if (rc)
1817 goto stop_iscsi_func;
1818
1819 /* Record BDQ producer doorbell addresses */
1820 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
1821 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
1822 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1823 "BDQ primary_prod=%p secondary_prod=%p.\n",
1824 qedi->bdq_primary_prod,
1825 qedi->bdq_secondary_prod);
1826
1827 /*
1828 * We need to write the number of BDs in the BDQ we've preallocated so
1829 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
1830 * packet arrives.
1831 */
1832 qedi->bdq_prod_idx = QEDI_BDQ_NUM;
1833 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1834 "Writing %d to primary and secondary BDQ doorbell registers.\n",
1835 qedi->bdq_prod_idx);
1836 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
1837 tmp = readw(qedi->bdq_primary_prod);
1838 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
1839 tmp = readw(qedi->bdq_secondary_prod);
1840
1841 ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
1842 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
1843 qedi->mac);
1844
1845 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1846 qedi_ops->common->set_id(qedi->cdev, host_buf, QEDI_MODULE_VERSION);
1847
1848 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
1849
1850 memset(&params, 0, sizeof(params));
1851 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
1852 qedi->ll2_mtu = DEF_PATH_MTU;
1853 params.drop_ttl0_packets = 0;
1854 params.rx_vlan_stripping = 1;
1855 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1856
1857 if (mode != QEDI_MODE_RECOVERY) {
1858 /* set up rx path */
1859 INIT_LIST_HEAD(&qedi->ll2_skb_list);
1860 spin_lock_init(&qedi->ll2_lock);
1861 /* start qedi context */
1862 spin_lock_init(&qedi->hba_lock);
1863 spin_lock_init(&qedi->task_idx_lock);
1864 }
1865 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
1866 qedi_ops->ll2->start(qedi->cdev, &params);
1867
1868 if (mode != QEDI_MODE_RECOVERY) {
1869 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
1870 (void *)qedi,
1871 "qedi_ll2_thread");
1872 }
1873
1874 rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
1875 qedi, qedi_iscsi_event_cb);
1876 if (rc) {
1877 rc = -ENODEV;
1878 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
1879 goto stop_slowpath;
1880 }
1881
1882 task_start = qedi_get_task_mem(&qedi->tasks, 0);
1883 task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
1884 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1885 "Task context start=%p, end=%p block_size=%u.\n",
1886 task_start, task_end, qedi->tasks.size);
1887
1888 memset(&link_params, 0, sizeof(link_params));
1889 link_params.link_up = true;
1890 rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
1891 if (rc) {
1892 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
1893 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1894 }
1895
1896 #ifdef CONFIG_DEBUG_FS
1897 qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
1898 &qedi_dbg_fops);
1899 #endif
1900 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1901 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
1902 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
1903 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
1904
1905 if (mode == QEDI_MODE_NORMAL) {
1906 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
1907 QEDI_ERR(&qedi->dbg_ctx,
1908 "Could not add iscsi host\n");
1909 rc = -ENOMEM;
1910 goto remove_host;
1911 }
1912
1913 /* Allocate uio buffers */
1914 rc = qedi_alloc_uio_rings(qedi);
1915 if (rc) {
1916 QEDI_ERR(&qedi->dbg_ctx,
1917 "UIO alloc ring failed err=%d\n", rc);
1918 goto remove_host;
1919 }
1920
1921 rc = qedi_init_uio(qedi);
1922 if (rc) {
1923 QEDI_ERR(&qedi->dbg_ctx,
1924 "UIO init failed, err=%d\n", rc);
1925 goto free_uio;
1926 }
1927
1928 /* host the array on iscsi_conn */
1929 rc = qedi_setup_cid_que(qedi);
1930 if (rc) {
1931 QEDI_ERR(&qedi->dbg_ctx,
1932 "Could not setup cid que\n");
1933 goto free_uio;
1934 }
1935
1936 rc = qedi_cm_alloc_mem(qedi);
1937 if (rc) {
1938 QEDI_ERR(&qedi->dbg_ctx,
1939 "Could not alloc cm memory\n");
1940 goto free_cid_que;
1941 }
1942
1943 rc = qedi_alloc_itt(qedi);
1944 if (rc) {
1945 QEDI_ERR(&qedi->dbg_ctx,
1946 "Could not alloc itt memory\n");
1947 goto free_cid_que;
1948 }
1949
1950 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1951 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
1952 if (!qedi->tmf_thread) {
1953 QEDI_ERR(&qedi->dbg_ctx,
1954 "Unable to start tmf thread!\n");
1955 rc = -ENODEV;
1956 goto free_cid_que;
1957 }
1958
1959 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
1960 qedi->offload_thread = create_workqueue(host_buf);
1961 if (!qedi->offload_thread) {
1962 QEDI_ERR(&qedi->dbg_ctx,
1963 "Unable to start offload thread!\n");
1964 rc = -ENODEV;
1965 goto free_cid_que;
1966 }
1967
1968 /* F/w needs 1st task context memory entry for performance */
1969 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
1970 atomic_set(&qedi->num_offloads, 0);
1971 }
1972
1973 return 0;
1974
1975 free_cid_que:
1976 qedi_release_cid_que(qedi);
1977 free_uio:
1978 qedi_free_uio(qedi->udev);
1979 remove_host:
1980 #ifdef CONFIG_DEBUG_FS
1981 qedi_dbg_host_exit(&qedi->dbg_ctx);
1982 #endif
1983 iscsi_host_remove(qedi->shost);
1984 stop_iscsi_func:
1985 qedi_ops->stop(qedi->cdev);
1986 stop_slowpath:
1987 qedi_ops->common->slowpath_stop(qedi->cdev);
1988 stop_hw:
1989 qedi_ops->common->remove(qedi->cdev);
1990 free_pf_params:
1991 qedi_free_iscsi_pf_param(qedi);
1992 free_host:
1993 iscsi_host_free(qedi->shost);
1994 exit_probe:
1995 return rc;
1996 }
1997
1998 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1999 {
2000 return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2001 }
2002
2003 static void qedi_remove(struct pci_dev *pdev)
2004 {
2005 __qedi_remove(pdev, QEDI_MODE_NORMAL);
2006 }
2007
2008 static struct pci_device_id qedi_pci_tbl[] = {
2009 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2010 { 0 },
2011 };
2012 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2013
2014 static enum cpuhp_state qedi_cpuhp_state;
2015
2016 static struct pci_driver qedi_pci_driver = {
2017 .name = QEDI_MODULE_NAME,
2018 .id_table = qedi_pci_tbl,
2019 .probe = qedi_probe,
2020 .remove = qedi_remove,
2021 };
2022
2023 static int __init qedi_init(void)
2024 {
2025 struct qedi_percpu_s *p;
2026 int cpu, rc = 0;
2027
2028 qedi_ops = qed_get_iscsi_ops();
2029 if (!qedi_ops) {
2030 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2031 return -EINVAL;
2032 }
2033
2034 #ifdef CONFIG_DEBUG_FS
2035 qedi_dbg_init("qedi");
2036 #endif
2037
2038 qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2039 if (!qedi_scsi_transport) {
2040 QEDI_ERR(NULL, "Could not register qedi transport");
2041 rc = -ENOMEM;
2042 goto exit_qedi_init_1;
2043 }
2044
2045 for_each_possible_cpu(cpu) {
2046 p = &per_cpu(qedi_percpu, cpu);
2047 INIT_LIST_HEAD(&p->work_list);
2048 spin_lock_init(&p->p_work_lock);
2049 p->iothread = NULL;
2050 }
2051
2052 rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2053 qedi_cpu_online, qedi_cpu_offline);
2054 if (rc < 0)
2055 goto exit_qedi_init_2;
2056 qedi_cpuhp_state = rc;
2057
2058 rc = pci_register_driver(&qedi_pci_driver);
2059 if (rc) {
2060 QEDI_ERR(NULL, "Failed to register driver\n");
2061 goto exit_qedi_hp;
2062 }
2063
2064 return 0;
2065
2066 exit_qedi_hp:
2067 cpuhp_remove_state(qedi_cpuhp_state);
2068 exit_qedi_init_2:
2069 iscsi_unregister_transport(&qedi_iscsi_transport);
2070 exit_qedi_init_1:
2071 #ifdef CONFIG_DEBUG_FS
2072 qedi_dbg_exit();
2073 #endif
2074 qed_put_iscsi_ops();
2075 return rc;
2076 }
2077
2078 static void __exit qedi_cleanup(void)
2079 {
2080 pci_unregister_driver(&qedi_pci_driver);
2081 cpuhp_remove_state(qedi_cpuhp_state);
2082 iscsi_unregister_transport(&qedi_iscsi_transport);
2083
2084 #ifdef CONFIG_DEBUG_FS
2085 qedi_dbg_exit();
2086 #endif
2087 qed_put_iscsi_ops();
2088 }
2089
2090 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2091 MODULE_LICENSE("GPL");
2092 MODULE_AUTHOR("QLogic Corporation");
2093 MODULE_VERSION(QEDI_MODULE_VERSION);
2094 module_init(qedi_init);
2095 module_exit(qedi_cleanup);
Linux with added FPC-III support