xref: /openbmc/linux/drivers/scsi/qedi/qedi_main.c (revision 68198dca)
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 #include <linux/iscsi_boot_sysfs.h>
23 
24 #include <scsi/scsi_cmnd.h>
25 #include <scsi/scsi_device.h>
26 #include <scsi/scsi_eh.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi.h>
29 
30 #include "qedi.h"
31 #include "qedi_gbl.h"
32 #include "qedi_iscsi.h"
33 
34 static uint qedi_fw_debug;
35 module_param(qedi_fw_debug, uint, 0644);
36 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
37 
38 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
39 module_param(qedi_dbg_log, uint, 0644);
40 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
41 
42 uint qedi_io_tracing;
43 module_param(qedi_io_tracing, uint, 0644);
44 MODULE_PARM_DESC(qedi_io_tracing,
45 		 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
46 
47 const struct qed_iscsi_ops *qedi_ops;
48 static struct scsi_transport_template *qedi_scsi_transport;
49 static struct pci_driver qedi_pci_driver;
50 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
51 static LIST_HEAD(qedi_udev_list);
52 /* Static function declaration */
53 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
54 static void qedi_free_global_queues(struct qedi_ctx *qedi);
55 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
56 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
57 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
58 
59 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
60 {
61 	struct qedi_ctx *qedi;
62 	struct qedi_endpoint *qedi_ep;
63 	struct async_data *data;
64 	int rval = 0;
65 
66 	if (!context || !fw_handle) {
67 		QEDI_ERR(NULL, "Recv event with ctx NULL\n");
68 		return -EINVAL;
69 	}
70 
71 	qedi = (struct qedi_ctx *)context;
72 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
73 		  "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
74 
75 	data = (struct async_data *)fw_handle;
76 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
77 		  "cid=0x%x tid=0x%x err-code=0x%x fw-dbg-param=0x%x\n",
78 		   data->cid, data->itid, data->error_code,
79 		   data->fw_debug_param);
80 
81 	qedi_ep = qedi->ep_tbl[data->cid];
82 
83 	if (!qedi_ep) {
84 		QEDI_WARN(&qedi->dbg_ctx,
85 			  "Cannot process event, ep already disconnected, cid=0x%x\n",
86 			   data->cid);
87 		WARN_ON(1);
88 		return -ENODEV;
89 	}
90 
91 	switch (fw_event_code) {
92 	case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
93 		if (qedi_ep->state == EP_STATE_OFLDCONN_START)
94 			qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
95 
96 		wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
97 		break;
98 	case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
99 		qedi_ep->state = EP_STATE_DISCONN_COMPL;
100 		wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
101 		break;
102 	case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
103 		qedi_process_iscsi_error(qedi_ep, data);
104 		break;
105 	case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
106 	case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
107 	case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
108 	case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
109 	case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
110 	case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
111 	case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
112 		qedi_process_tcp_error(qedi_ep, data);
113 		break;
114 	default:
115 		QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
116 			 fw_event_code);
117 	}
118 
119 	return rval;
120 }
121 
122 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
123 {
124 	struct qedi_uio_dev *udev = uinfo->priv;
125 	struct qedi_ctx *qedi = udev->qedi;
126 
127 	if (!capable(CAP_NET_ADMIN))
128 		return -EPERM;
129 
130 	if (udev->uio_dev != -1)
131 		return -EBUSY;
132 
133 	rtnl_lock();
134 	udev->uio_dev = iminor(inode);
135 	qedi_reset_uio_rings(udev);
136 	set_bit(UIO_DEV_OPENED, &qedi->flags);
137 	rtnl_unlock();
138 
139 	return 0;
140 }
141 
142 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
143 {
144 	struct qedi_uio_dev *udev = uinfo->priv;
145 	struct qedi_ctx *qedi = udev->qedi;
146 
147 	udev->uio_dev = -1;
148 	clear_bit(UIO_DEV_OPENED, &qedi->flags);
149 	qedi_ll2_free_skbs(qedi);
150 	return 0;
151 }
152 
153 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
154 {
155 	if (udev->uctrl) {
156 		free_page((unsigned long)udev->uctrl);
157 		udev->uctrl = NULL;
158 	}
159 
160 	if (udev->ll2_ring) {
161 		free_page((unsigned long)udev->ll2_ring);
162 		udev->ll2_ring = NULL;
163 	}
164 
165 	if (udev->ll2_buf) {
166 		free_pages((unsigned long)udev->ll2_buf, 2);
167 		udev->ll2_buf = NULL;
168 	}
169 }
170 
171 static void __qedi_free_uio(struct qedi_uio_dev *udev)
172 {
173 	uio_unregister_device(&udev->qedi_uinfo);
174 
175 	__qedi_free_uio_rings(udev);
176 
177 	pci_dev_put(udev->pdev);
178 	kfree(udev);
179 }
180 
181 static void qedi_free_uio(struct qedi_uio_dev *udev)
182 {
183 	if (!udev)
184 		return;
185 
186 	list_del_init(&udev->list);
187 	__qedi_free_uio(udev);
188 }
189 
190 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
191 {
192 	struct qedi_ctx *qedi = NULL;
193 	struct qedi_uio_ctrl *uctrl = NULL;
194 
195 	qedi = udev->qedi;
196 	uctrl = udev->uctrl;
197 
198 	spin_lock_bh(&qedi->ll2_lock);
199 	uctrl->host_rx_cons = 0;
200 	uctrl->hw_rx_prod = 0;
201 	uctrl->hw_rx_bd_prod = 0;
202 	uctrl->host_rx_bd_cons = 0;
203 
204 	memset(udev->ll2_ring, 0, udev->ll2_ring_size);
205 	memset(udev->ll2_buf, 0, udev->ll2_buf_size);
206 	spin_unlock_bh(&qedi->ll2_lock);
207 }
208 
209 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
210 {
211 	int rc = 0;
212 
213 	if (udev->ll2_ring || udev->ll2_buf)
214 		return rc;
215 
216 	/* Memory for control area.  */
217 	udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
218 	if (!udev->uctrl)
219 		return -ENOMEM;
220 
221 	/* Allocating memory for LL2 ring  */
222 	udev->ll2_ring_size = QEDI_PAGE_SIZE;
223 	udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
224 	if (!udev->ll2_ring) {
225 		rc = -ENOMEM;
226 		goto exit_alloc_ring;
227 	}
228 
229 	/* Allocating memory for Tx/Rx pkt buffer */
230 	udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
231 	udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
232 	udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
233 						 __GFP_ZERO, 2);
234 	if (!udev->ll2_buf) {
235 		rc = -ENOMEM;
236 		goto exit_alloc_buf;
237 	}
238 	return rc;
239 
240 exit_alloc_buf:
241 	free_page((unsigned long)udev->ll2_ring);
242 	udev->ll2_ring = NULL;
243 exit_alloc_ring:
244 	return rc;
245 }
246 
247 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
248 {
249 	struct qedi_uio_dev *udev = NULL;
250 	int rc = 0;
251 
252 	list_for_each_entry(udev, &qedi_udev_list, list) {
253 		if (udev->pdev == qedi->pdev) {
254 			udev->qedi = qedi;
255 			if (__qedi_alloc_uio_rings(udev)) {
256 				udev->qedi = NULL;
257 				return -ENOMEM;
258 			}
259 			qedi->udev = udev;
260 			return 0;
261 		}
262 	}
263 
264 	udev = kzalloc(sizeof(*udev), GFP_KERNEL);
265 	if (!udev) {
266 		rc = -ENOMEM;
267 		goto err_udev;
268 	}
269 
270 	udev->uio_dev = -1;
271 
272 	udev->qedi = qedi;
273 	udev->pdev = qedi->pdev;
274 
275 	rc = __qedi_alloc_uio_rings(udev);
276 	if (rc)
277 		goto err_uctrl;
278 
279 	list_add(&udev->list, &qedi_udev_list);
280 
281 	pci_dev_get(udev->pdev);
282 	qedi->udev = udev;
283 
284 	udev->tx_pkt = udev->ll2_buf;
285 	udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
286 	return 0;
287 
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 
798 	num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
799 
800 	qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
801 
802 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
803 		  "Number of CQ count is %d\n", qedi->num_queues);
804 
805 	memset(&qedi->pf_params.iscsi_pf_params, 0,
806 	       sizeof(qedi->pf_params.iscsi_pf_params));
807 
808 	qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
809 			qedi->num_queues * sizeof(struct qedi_glbl_q_params),
810 			&qedi->hw_p_cpuq);
811 	if (!qedi->p_cpuq) {
812 		QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
813 		rval = -1;
814 		goto err_alloc_mem;
815 	}
816 
817 	rval = qedi_alloc_global_queues(qedi);
818 	if (rval) {
819 		QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
820 		rval = -1;
821 		goto err_alloc_mem;
822 	}
823 
824 	qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
825 	qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
826 	qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
827 	qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
828 	qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
829 	qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
830 	qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
831 	qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
832 	qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
833 	qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
834 
835 	for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
836 		if ((1 << log_page_size) == PAGE_SIZE)
837 			break;
838 	}
839 	qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
840 
841 	qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
842 							   (u64)qedi->hw_p_cpuq;
843 
844 	/* RQ BDQ initializations.
845 	 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
846 	 * rqe_log_size: 8 for 256B RQE
847 	 */
848 	qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
849 	/* BDQ address and size */
850 	qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
851 							qedi->bdq_pbl_list_dma;
852 	qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
853 						qedi->bdq_pbl_list_num_entries;
854 	qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
855 
856 	/* cq_num_entries: num_tasks + rq_num_entries */
857 	qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
858 
859 	qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
860 	qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
861 	qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
862 
863 err_alloc_mem:
864 	return rval;
865 }
866 
867 /* Free DMA coherent memory for array of queue pointers we pass to qed */
868 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
869 {
870 	size_t size = 0;
871 
872 	if (qedi->p_cpuq) {
873 		size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
874 		pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
875 				    qedi->hw_p_cpuq);
876 	}
877 
878 	qedi_free_global_queues(qedi);
879 
880 	kfree(qedi->global_queues);
881 }
882 
883 static void qedi_link_update(void *dev, struct qed_link_output *link)
884 {
885 	struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
886 
887 	if (link->link_up) {
888 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
889 		atomic_set(&qedi->link_state, QEDI_LINK_UP);
890 	} else {
891 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
892 			  "Link Down event.\n");
893 		atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
894 	}
895 }
896 
897 static struct qed_iscsi_cb_ops qedi_cb_ops = {
898 	{
899 		.link_update =		qedi_link_update,
900 	}
901 };
902 
903 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
904 			  u16 que_idx, struct qedi_percpu_s *p)
905 {
906 	struct qedi_work *qedi_work;
907 	struct qedi_conn *q_conn;
908 	struct iscsi_conn *conn;
909 	struct qedi_cmd *qedi_cmd;
910 	u32 iscsi_cid;
911 	int rc = 0;
912 
913 	iscsi_cid  = cqe->cqe_common.conn_id;
914 	q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
915 	if (!q_conn) {
916 		QEDI_WARN(&qedi->dbg_ctx,
917 			  "Session no longer exists for cid=0x%x!!\n",
918 			  iscsi_cid);
919 		return -1;
920 	}
921 	conn = q_conn->cls_conn->dd_data;
922 
923 	switch (cqe->cqe_common.cqe_type) {
924 	case ISCSI_CQE_TYPE_SOLICITED:
925 	case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
926 		qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
927 		if (!qedi_cmd) {
928 			rc = -1;
929 			break;
930 		}
931 		INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
932 		qedi_cmd->cqe_work.qedi = qedi;
933 		memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
934 		qedi_cmd->cqe_work.que_idx = que_idx;
935 		qedi_cmd->cqe_work.is_solicited = true;
936 		list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
937 		break;
938 	case ISCSI_CQE_TYPE_UNSOLICITED:
939 	case ISCSI_CQE_TYPE_DUMMY:
940 	case ISCSI_CQE_TYPE_TASK_CLEANUP:
941 		qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
942 		if (!qedi_work) {
943 			rc = -1;
944 			break;
945 		}
946 		INIT_LIST_HEAD(&qedi_work->list);
947 		qedi_work->qedi = qedi;
948 		memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
949 		qedi_work->que_idx = que_idx;
950 		qedi_work->is_solicited = false;
951 		list_add_tail(&qedi_work->list, &p->work_list);
952 		break;
953 	default:
954 		rc = -1;
955 		QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
956 	}
957 	return rc;
958 }
959 
960 static bool qedi_process_completions(struct qedi_fastpath *fp)
961 {
962 	struct qedi_ctx *qedi = fp->qedi;
963 	struct qed_sb_info *sb_info = fp->sb_info;
964 	struct status_block *sb = sb_info->sb_virt;
965 	struct qedi_percpu_s *p = NULL;
966 	struct global_queue *que;
967 	u16 prod_idx;
968 	unsigned long flags;
969 	union iscsi_cqe *cqe;
970 	int cpu;
971 	int ret;
972 
973 	/* Get the current firmware producer index */
974 	prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
975 
976 	if (prod_idx >= QEDI_CQ_SIZE)
977 		prod_idx = prod_idx % QEDI_CQ_SIZE;
978 
979 	que = qedi->global_queues[fp->sb_id];
980 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
981 		  "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
982 		  que, prod_idx, que->cq_cons_idx, fp->sb_id);
983 
984 	qedi->intr_cpu = fp->sb_id;
985 	cpu = smp_processor_id();
986 	p = &per_cpu(qedi_percpu, cpu);
987 
988 	if (unlikely(!p->iothread))
989 		WARN_ON(1);
990 
991 	spin_lock_irqsave(&p->p_work_lock, flags);
992 	while (que->cq_cons_idx != prod_idx) {
993 		cqe = &que->cq[que->cq_cons_idx];
994 
995 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
996 			  "cqe=%p prod_idx=%d cons_idx=%d.\n",
997 			  cqe, prod_idx, que->cq_cons_idx);
998 
999 		ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1000 		if (ret)
1001 			continue;
1002 
1003 		que->cq_cons_idx++;
1004 		if (que->cq_cons_idx == QEDI_CQ_SIZE)
1005 			que->cq_cons_idx = 0;
1006 	}
1007 	wake_up_process(p->iothread);
1008 	spin_unlock_irqrestore(&p->p_work_lock, flags);
1009 
1010 	return true;
1011 }
1012 
1013 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1014 {
1015 	struct qedi_ctx *qedi = fp->qedi;
1016 	struct global_queue *que;
1017 	struct qed_sb_info *sb_info = fp->sb_info;
1018 	struct status_block *sb = sb_info->sb_virt;
1019 	u16 prod_idx;
1020 
1021 	barrier();
1022 
1023 	/* Get the current firmware producer index */
1024 	prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1025 
1026 	/* Get the pointer to the global CQ this completion is on */
1027 	que = qedi->global_queues[fp->sb_id];
1028 
1029 	/* prod idx wrap around uint16 */
1030 	if (prod_idx >= QEDI_CQ_SIZE)
1031 		prod_idx = prod_idx % QEDI_CQ_SIZE;
1032 
1033 	return (que->cq_cons_idx != prod_idx);
1034 }
1035 
1036 /* MSI-X fastpath handler code */
1037 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1038 {
1039 	struct qedi_fastpath *fp = dev_id;
1040 	struct qedi_ctx *qedi = fp->qedi;
1041 	bool wake_io_thread = true;
1042 
1043 	qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1044 
1045 process_again:
1046 	wake_io_thread = qedi_process_completions(fp);
1047 	if (wake_io_thread) {
1048 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1049 			  "process already running\n");
1050 	}
1051 
1052 	if (qedi_fp_has_work(fp) == 0)
1053 		qed_sb_update_sb_idx(fp->sb_info);
1054 
1055 	/* Check for more work */
1056 	rmb();
1057 
1058 	if (qedi_fp_has_work(fp) == 0)
1059 		qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1060 	else
1061 		goto process_again;
1062 
1063 	return IRQ_HANDLED;
1064 }
1065 
1066 /* simd handler for MSI/INTa */
1067 static void qedi_simd_int_handler(void *cookie)
1068 {
1069 	/* Cookie is qedi_ctx struct */
1070 	struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1071 
1072 	QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1073 }
1074 
1075 #define QEDI_SIMD_HANDLER_NUM		0
1076 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1077 {
1078 	int i;
1079 
1080 	if (qedi->int_info.msix_cnt) {
1081 		for (i = 0; i < qedi->int_info.used_cnt; i++) {
1082 			synchronize_irq(qedi->int_info.msix[i].vector);
1083 			irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1084 					      NULL);
1085 			free_irq(qedi->int_info.msix[i].vector,
1086 				 &qedi->fp_array[i]);
1087 		}
1088 	} else {
1089 		qedi_ops->common->simd_handler_clean(qedi->cdev,
1090 						     QEDI_SIMD_HANDLER_NUM);
1091 	}
1092 
1093 	qedi->int_info.used_cnt = 0;
1094 	qedi_ops->common->set_fp_int(qedi->cdev, 0);
1095 }
1096 
1097 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1098 {
1099 	int i, rc, cpu;
1100 
1101 	cpu = cpumask_first(cpu_online_mask);
1102 	for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1103 		rc = request_irq(qedi->int_info.msix[i].vector,
1104 				 qedi_msix_handler, 0, "qedi",
1105 				 &qedi->fp_array[i]);
1106 
1107 		if (rc) {
1108 			QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1109 			qedi_sync_free_irqs(qedi);
1110 			return rc;
1111 		}
1112 		qedi->int_info.used_cnt++;
1113 		rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1114 					   get_cpu_mask(cpu));
1115 		cpu = cpumask_next(cpu, cpu_online_mask);
1116 	}
1117 
1118 	return 0;
1119 }
1120 
1121 static int qedi_setup_int(struct qedi_ctx *qedi)
1122 {
1123 	int rc = 0;
1124 
1125 	rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1126 	rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1127 	if (rc)
1128 		goto exit_setup_int;
1129 
1130 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1131 		  "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1132 		   qedi->int_info.msix_cnt, num_online_cpus());
1133 
1134 	if (qedi->int_info.msix_cnt) {
1135 		rc = qedi_request_msix_irq(qedi);
1136 		goto exit_setup_int;
1137 	} else {
1138 		qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1139 						      QEDI_SIMD_HANDLER_NUM,
1140 						      qedi_simd_int_handler);
1141 		qedi->int_info.used_cnt = 1;
1142 	}
1143 
1144 exit_setup_int:
1145 	return rc;
1146 }
1147 
1148 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1149 {
1150 	if (qedi->iscsi_cfg)
1151 		dma_free_coherent(&qedi->pdev->dev,
1152 				  sizeof(struct nvm_iscsi_cfg),
1153 				  qedi->iscsi_cfg, qedi->nvm_buf_dma);
1154 }
1155 
1156 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1157 {
1158 	qedi->iscsi_cfg = dma_zalloc_coherent(&qedi->pdev->dev,
1159 					     sizeof(struct nvm_iscsi_cfg),
1160 					     &qedi->nvm_buf_dma, GFP_KERNEL);
1161 	if (!qedi->iscsi_cfg) {
1162 		QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1163 		return -ENOMEM;
1164 	}
1165 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1166 		  "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_cfg,
1167 		  qedi->nvm_buf_dma);
1168 
1169 	return 0;
1170 }
1171 
1172 static void qedi_free_bdq(struct qedi_ctx *qedi)
1173 {
1174 	int i;
1175 
1176 	if (qedi->bdq_pbl_list)
1177 		dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1178 				  qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1179 
1180 	if (qedi->bdq_pbl)
1181 		dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1182 				  qedi->bdq_pbl, qedi->bdq_pbl_dma);
1183 
1184 	for (i = 0; i < QEDI_BDQ_NUM; i++) {
1185 		if (qedi->bdq[i].buf_addr) {
1186 			dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1187 					  qedi->bdq[i].buf_addr,
1188 					  qedi->bdq[i].buf_dma);
1189 		}
1190 	}
1191 }
1192 
1193 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1194 {
1195 	int i;
1196 	struct global_queue **gl = qedi->global_queues;
1197 
1198 	for (i = 0; i < qedi->num_queues; i++) {
1199 		if (!gl[i])
1200 			continue;
1201 
1202 		if (gl[i]->cq)
1203 			dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1204 					  gl[i]->cq, gl[i]->cq_dma);
1205 		if (gl[i]->cq_pbl)
1206 			dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1207 					  gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1208 
1209 		kfree(gl[i]);
1210 	}
1211 	qedi_free_bdq(qedi);
1212 	qedi_free_nvm_iscsi_cfg(qedi);
1213 }
1214 
1215 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1216 {
1217 	int i;
1218 	struct scsi_bd *pbl;
1219 	u64 *list;
1220 	dma_addr_t page;
1221 
1222 	/* Alloc dma memory for BDQ buffers */
1223 	for (i = 0; i < QEDI_BDQ_NUM; i++) {
1224 		qedi->bdq[i].buf_addr =
1225 				dma_alloc_coherent(&qedi->pdev->dev,
1226 						   QEDI_BDQ_BUF_SIZE,
1227 						   &qedi->bdq[i].buf_dma,
1228 						   GFP_KERNEL);
1229 		if (!qedi->bdq[i].buf_addr) {
1230 			QEDI_ERR(&qedi->dbg_ctx,
1231 				 "Could not allocate BDQ buffer %d.\n", i);
1232 			return -ENOMEM;
1233 		}
1234 	}
1235 
1236 	/* Alloc dma memory for BDQ page buffer list */
1237 	qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1238 	qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1239 	qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1240 
1241 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1242 		  qedi->rq_num_entries);
1243 
1244 	qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1245 					   qedi->bdq_pbl_mem_size,
1246 					   &qedi->bdq_pbl_dma, GFP_KERNEL);
1247 	if (!qedi->bdq_pbl) {
1248 		QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1249 		return -ENOMEM;
1250 	}
1251 
1252 	/*
1253 	 * Populate BDQ PBL with physical and virtual address of individual
1254 	 * BDQ buffers
1255 	 */
1256 	pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1257 	for (i = 0; i < QEDI_BDQ_NUM; i++) {
1258 		pbl->address.hi =
1259 				cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1260 		pbl->address.lo =
1261 				cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1262 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1263 			  "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1264 			  pbl, pbl->address.hi, pbl->address.lo, i);
1265 		pbl->opaque.hi = 0;
1266 		pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
1267 		pbl++;
1268 	}
1269 
1270 	/* Allocate list of PBL pages */
1271 	qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1272 						PAGE_SIZE,
1273 						&qedi->bdq_pbl_list_dma,
1274 						GFP_KERNEL);
1275 	if (!qedi->bdq_pbl_list) {
1276 		QEDI_ERR(&qedi->dbg_ctx,
1277 			 "Could not allocate list of PBL pages.\n");
1278 		return -ENOMEM;
1279 	}
1280 	memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
1281 
1282 	/*
1283 	 * Now populate PBL list with pages that contain pointers to the
1284 	 * individual buffers.
1285 	 */
1286 	qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1287 	list = (u64 *)qedi->bdq_pbl_list;
1288 	page = qedi->bdq_pbl_list_dma;
1289 	for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1290 		*list = qedi->bdq_pbl_dma;
1291 		list++;
1292 		page += PAGE_SIZE;
1293 	}
1294 
1295 	return 0;
1296 }
1297 
1298 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1299 {
1300 	u32 *list;
1301 	int i;
1302 	int status = 0, rc;
1303 	u32 *pbl;
1304 	dma_addr_t page;
1305 	int num_pages;
1306 
1307 	/*
1308 	 * Number of global queues (CQ / RQ). This should
1309 	 * be <= number of available MSIX vectors for the PF
1310 	 */
1311 	if (!qedi->num_queues) {
1312 		QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1313 		return 1;
1314 	}
1315 
1316 	/* Make sure we allocated the PBL that will contain the physical
1317 	 * addresses of our queues
1318 	 */
1319 	if (!qedi->p_cpuq) {
1320 		status = 1;
1321 		goto mem_alloc_failure;
1322 	}
1323 
1324 	qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1325 				       qedi->num_queues), GFP_KERNEL);
1326 	if (!qedi->global_queues) {
1327 		QEDI_ERR(&qedi->dbg_ctx,
1328 			 "Unable to allocate global queues array ptr memory\n");
1329 		return -ENOMEM;
1330 	}
1331 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1332 		  "qedi->global_queues=%p.\n", qedi->global_queues);
1333 
1334 	/* Allocate DMA coherent buffers for BDQ */
1335 	rc = qedi_alloc_bdq(qedi);
1336 	if (rc)
1337 		goto mem_alloc_failure;
1338 
1339 	/* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1340 	rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1341 	if (rc)
1342 		goto mem_alloc_failure;
1343 
1344 	/* Allocate a CQ and an associated PBL for each MSI-X
1345 	 * vector.
1346 	 */
1347 	for (i = 0; i < qedi->num_queues; i++) {
1348 		qedi->global_queues[i] =
1349 					kzalloc(sizeof(*qedi->global_queues[0]),
1350 						GFP_KERNEL);
1351 		if (!qedi->global_queues[i]) {
1352 			QEDI_ERR(&qedi->dbg_ctx,
1353 				 "Unable to allocation global queue %d.\n", i);
1354 			goto mem_alloc_failure;
1355 		}
1356 
1357 		qedi->global_queues[i]->cq_mem_size =
1358 		    (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1359 		qedi->global_queues[i]->cq_mem_size =
1360 		    (qedi->global_queues[i]->cq_mem_size +
1361 		    (QEDI_PAGE_SIZE - 1));
1362 
1363 		qedi->global_queues[i]->cq_pbl_size =
1364 		    (qedi->global_queues[i]->cq_mem_size /
1365 		    QEDI_PAGE_SIZE) * sizeof(void *);
1366 		qedi->global_queues[i]->cq_pbl_size =
1367 		    (qedi->global_queues[i]->cq_pbl_size +
1368 		    (QEDI_PAGE_SIZE - 1));
1369 
1370 		qedi->global_queues[i]->cq =
1371 		    dma_alloc_coherent(&qedi->pdev->dev,
1372 				       qedi->global_queues[i]->cq_mem_size,
1373 				       &qedi->global_queues[i]->cq_dma,
1374 				       GFP_KERNEL);
1375 
1376 		if (!qedi->global_queues[i]->cq) {
1377 			QEDI_WARN(&qedi->dbg_ctx,
1378 				  "Could not allocate cq.\n");
1379 			status = -ENOMEM;
1380 			goto mem_alloc_failure;
1381 		}
1382 		memset(qedi->global_queues[i]->cq, 0,
1383 		       qedi->global_queues[i]->cq_mem_size);
1384 
1385 		qedi->global_queues[i]->cq_pbl =
1386 		    dma_alloc_coherent(&qedi->pdev->dev,
1387 				       qedi->global_queues[i]->cq_pbl_size,
1388 				       &qedi->global_queues[i]->cq_pbl_dma,
1389 				       GFP_KERNEL);
1390 
1391 		if (!qedi->global_queues[i]->cq_pbl) {
1392 			QEDI_WARN(&qedi->dbg_ctx,
1393 				  "Could not allocate cq PBL.\n");
1394 			status = -ENOMEM;
1395 			goto mem_alloc_failure;
1396 		}
1397 		memset(qedi->global_queues[i]->cq_pbl, 0,
1398 		       qedi->global_queues[i]->cq_pbl_size);
1399 
1400 		/* Create PBL */
1401 		num_pages = qedi->global_queues[i]->cq_mem_size /
1402 		    QEDI_PAGE_SIZE;
1403 		page = qedi->global_queues[i]->cq_dma;
1404 		pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1405 
1406 		while (num_pages--) {
1407 			*pbl = (u32)page;
1408 			pbl++;
1409 			*pbl = (u32)((u64)page >> 32);
1410 			pbl++;
1411 			page += QEDI_PAGE_SIZE;
1412 		}
1413 	}
1414 
1415 	list = (u32 *)qedi->p_cpuq;
1416 
1417 	/*
1418 	 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1419 	 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1420 	 * to the physical address which contains an array of pointers to the
1421 	 * physical addresses of the specific queue pages.
1422 	 */
1423 	for (i = 0; i < qedi->num_queues; i++) {
1424 		*list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1425 		list++;
1426 		*list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1427 		list++;
1428 
1429 		*list = (u32)0;
1430 		list++;
1431 		*list = (u32)((u64)0 >> 32);
1432 		list++;
1433 	}
1434 
1435 	return 0;
1436 
1437 mem_alloc_failure:
1438 	qedi_free_global_queues(qedi);
1439 	return status;
1440 }
1441 
1442 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1443 {
1444 	int rval = 0;
1445 	u32 *pbl;
1446 	dma_addr_t page;
1447 	int num_pages;
1448 
1449 	if (!ep)
1450 		return -EIO;
1451 
1452 	/* Calculate appropriate queue and PBL sizes */
1453 	ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1454 	ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1455 
1456 	ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1457 	ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1458 
1459 	ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1460 				    &ep->sq_dma, GFP_KERNEL);
1461 	if (!ep->sq) {
1462 		QEDI_WARN(&qedi->dbg_ctx,
1463 			  "Could not allocate send queue.\n");
1464 		rval = -ENOMEM;
1465 		goto out;
1466 	}
1467 	memset(ep->sq, 0, ep->sq_mem_size);
1468 
1469 	ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1470 					&ep->sq_pbl_dma, GFP_KERNEL);
1471 	if (!ep->sq_pbl) {
1472 		QEDI_WARN(&qedi->dbg_ctx,
1473 			  "Could not allocate send queue PBL.\n");
1474 		rval = -ENOMEM;
1475 		goto out_free_sq;
1476 	}
1477 	memset(ep->sq_pbl, 0, ep->sq_pbl_size);
1478 
1479 	/* Create PBL */
1480 	num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1481 	page = ep->sq_dma;
1482 	pbl = (u32 *)ep->sq_pbl;
1483 
1484 	while (num_pages--) {
1485 		*pbl = (u32)page;
1486 		pbl++;
1487 		*pbl = (u32)((u64)page >> 32);
1488 		pbl++;
1489 		page += QEDI_PAGE_SIZE;
1490 	}
1491 
1492 	return rval;
1493 
1494 out_free_sq:
1495 	dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1496 			  ep->sq_dma);
1497 out:
1498 	return rval;
1499 }
1500 
1501 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1502 {
1503 	if (ep->sq_pbl)
1504 		dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1505 				  ep->sq_pbl_dma);
1506 	if (ep->sq)
1507 		dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1508 				  ep->sq_dma);
1509 }
1510 
1511 int qedi_get_task_idx(struct qedi_ctx *qedi)
1512 {
1513 	s16 tmp_idx;
1514 
1515 again:
1516 	tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1517 				      MAX_ISCSI_TASK_ENTRIES);
1518 
1519 	if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1520 		QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1521 		tmp_idx = -1;
1522 		goto err_idx;
1523 	}
1524 
1525 	if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1526 		goto again;
1527 
1528 err_idx:
1529 	return tmp_idx;
1530 }
1531 
1532 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1533 {
1534 	if (!test_and_clear_bit(idx, qedi->task_idx_map))
1535 		QEDI_ERR(&qedi->dbg_ctx,
1536 			 "FW task context, already cleared, tid=0x%x\n", idx);
1537 }
1538 
1539 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1540 			 struct qedi_cmd *cmd)
1541 {
1542 	qedi->itt_map[tid].itt = proto_itt;
1543 	qedi->itt_map[tid].p_cmd = cmd;
1544 
1545 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1546 		  "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1547 		  qedi->itt_map[tid].itt);
1548 }
1549 
1550 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1551 {
1552 	u16 i;
1553 
1554 	for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1555 		if (qedi->itt_map[i].itt == itt) {
1556 			*tid = i;
1557 			QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1558 				  "Ref itt=0x%x, found at tid=0x%x\n",
1559 				  itt, *tid);
1560 			return;
1561 		}
1562 	}
1563 
1564 	WARN_ON(1);
1565 }
1566 
1567 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1568 {
1569 	*proto_itt = qedi->itt_map[tid].itt;
1570 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1571 		  "Get itt map tid [0x%x with proto itt[0x%x]",
1572 		  tid, *proto_itt);
1573 }
1574 
1575 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1576 {
1577 	struct qedi_cmd *cmd = NULL;
1578 
1579 	if (tid >= MAX_ISCSI_TASK_ENTRIES)
1580 		return NULL;
1581 
1582 	cmd = qedi->itt_map[tid].p_cmd;
1583 	if (cmd->task_id != tid)
1584 		return NULL;
1585 
1586 	qedi->itt_map[tid].p_cmd = NULL;
1587 
1588 	return cmd;
1589 }
1590 
1591 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1592 {
1593 	qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1594 				sizeof(struct qedi_itt_map), GFP_KERNEL);
1595 	if (!qedi->itt_map) {
1596 		QEDI_ERR(&qedi->dbg_ctx,
1597 			 "Unable to allocate itt map array memory\n");
1598 		return -ENOMEM;
1599 	}
1600 	return 0;
1601 }
1602 
1603 static void qedi_free_itt(struct qedi_ctx *qedi)
1604 {
1605 	kfree(qedi->itt_map);
1606 }
1607 
1608 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1609 	.rx_cb = qedi_ll2_rx,
1610 	.tx_cb = NULL,
1611 };
1612 
1613 static int qedi_percpu_io_thread(void *arg)
1614 {
1615 	struct qedi_percpu_s *p = arg;
1616 	struct qedi_work *work, *tmp;
1617 	unsigned long flags;
1618 	LIST_HEAD(work_list);
1619 
1620 	set_user_nice(current, -20);
1621 
1622 	while (!kthread_should_stop()) {
1623 		spin_lock_irqsave(&p->p_work_lock, flags);
1624 		while (!list_empty(&p->work_list)) {
1625 			list_splice_init(&p->work_list, &work_list);
1626 			spin_unlock_irqrestore(&p->p_work_lock, flags);
1627 
1628 			list_for_each_entry_safe(work, tmp, &work_list, list) {
1629 				list_del_init(&work->list);
1630 				qedi_fp_process_cqes(work);
1631 				if (!work->is_solicited)
1632 					kfree(work);
1633 			}
1634 			cond_resched();
1635 			spin_lock_irqsave(&p->p_work_lock, flags);
1636 		}
1637 		set_current_state(TASK_INTERRUPTIBLE);
1638 		spin_unlock_irqrestore(&p->p_work_lock, flags);
1639 		schedule();
1640 	}
1641 	__set_current_state(TASK_RUNNING);
1642 
1643 	return 0;
1644 }
1645 
1646 static int qedi_cpu_online(unsigned int cpu)
1647 {
1648 	struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1649 	struct task_struct *thread;
1650 
1651 	thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1652 					cpu_to_node(cpu),
1653 					"qedi_thread/%d", cpu);
1654 	if (IS_ERR(thread))
1655 		return PTR_ERR(thread);
1656 
1657 	kthread_bind(thread, cpu);
1658 	p->iothread = thread;
1659 	wake_up_process(thread);
1660 	return 0;
1661 }
1662 
1663 static int qedi_cpu_offline(unsigned int cpu)
1664 {
1665 	struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1666 	struct qedi_work *work, *tmp;
1667 	struct task_struct *thread;
1668 
1669 	spin_lock_bh(&p->p_work_lock);
1670 	thread = p->iothread;
1671 	p->iothread = NULL;
1672 
1673 	list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1674 		list_del_init(&work->list);
1675 		qedi_fp_process_cqes(work);
1676 		if (!work->is_solicited)
1677 			kfree(work);
1678 	}
1679 
1680 	spin_unlock_bh(&p->p_work_lock);
1681 	if (thread)
1682 		kthread_stop(thread);
1683 	return 0;
1684 }
1685 
1686 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1687 {
1688 	struct qed_ll2_params params;
1689 
1690 	qedi_recover_all_conns(qedi);
1691 
1692 	qedi_ops->ll2->stop(qedi->cdev);
1693 	qedi_ll2_free_skbs(qedi);
1694 
1695 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1696 		  qedi->ll2_mtu, mtu);
1697 	memset(&params, 0, sizeof(params));
1698 	qedi->ll2_mtu = mtu;
1699 	params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1700 	params.drop_ttl0_packets = 0;
1701 	params.rx_vlan_stripping = 1;
1702 	ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1703 	qedi_ops->ll2->start(qedi->cdev, &params);
1704 }
1705 
1706 /**
1707  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1708  * for gaps) for the matching absolute-pf-id of the QEDI device.
1709  */
1710 static struct nvm_iscsi_block *
1711 qedi_get_nvram_block(struct qedi_ctx *qedi)
1712 {
1713 	int i;
1714 	u8 pf;
1715 	u32 flags;
1716 	struct nvm_iscsi_block *block;
1717 
1718 	pf = qedi->dev_info.common.abs_pf_id;
1719 	block = &qedi->iscsi_cfg->block[0];
1720 	for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1721 		flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1722 			NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1723 		if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1724 				NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1725 			(pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1726 				>> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1727 			return block;
1728 	}
1729 	return NULL;
1730 }
1731 
1732 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1733 {
1734 	struct qedi_ctx *qedi = data;
1735 	struct nvm_iscsi_initiator *initiator;
1736 	char *str = buf;
1737 	int rc = 1;
1738 	u32 ipv6_en, dhcp_en, ip_len;
1739 	struct nvm_iscsi_block *block;
1740 	char *fmt, *ip, *sub, *gw;
1741 
1742 	block = qedi_get_nvram_block(qedi);
1743 	if (!block)
1744 		return 0;
1745 
1746 	initiator = &block->initiator;
1747 	ipv6_en = block->generic.ctrl_flags &
1748 		  NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1749 	dhcp_en = block->generic.ctrl_flags &
1750 		  NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1751 	/* Static IP assignments. */
1752 	fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1753 	ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1754 	ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1755 	sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1756 	      initiator->ipv4.subnet_mask.byte;
1757 	gw = ipv6_en ? initiator->ipv6.gateway.byte :
1758 	     initiator->ipv4.gateway.byte;
1759 	/* DHCP IP adjustments. */
1760 	fmt = dhcp_en ? "%s\n" : fmt;
1761 	if (dhcp_en) {
1762 		ip = ipv6_en ? "0::0" : "0.0.0.0";
1763 		sub = ip;
1764 		gw = ip;
1765 		ip_len = ipv6_en ? 5 : 8;
1766 	}
1767 
1768 	switch (type) {
1769 	case ISCSI_BOOT_ETH_IP_ADDR:
1770 		rc = snprintf(str, ip_len, fmt, ip);
1771 		break;
1772 	case ISCSI_BOOT_ETH_SUBNET_MASK:
1773 		rc = snprintf(str, ip_len, fmt, sub);
1774 		break;
1775 	case ISCSI_BOOT_ETH_GATEWAY:
1776 		rc = snprintf(str, ip_len, fmt, gw);
1777 		break;
1778 	case ISCSI_BOOT_ETH_FLAGS:
1779 		rc = snprintf(str, 3, "%hhd\n",
1780 			      SYSFS_FLAG_FW_SEL_BOOT);
1781 		break;
1782 	case ISCSI_BOOT_ETH_INDEX:
1783 		rc = snprintf(str, 3, "0\n");
1784 		break;
1785 	case ISCSI_BOOT_ETH_MAC:
1786 		rc = sysfs_format_mac(str, qedi->mac, ETH_ALEN);
1787 		break;
1788 	case ISCSI_BOOT_ETH_VLAN:
1789 		rc = snprintf(str, 12, "%d\n",
1790 			      GET_FIELD2(initiator->generic_cont0,
1791 					 NVM_ISCSI_CFG_INITIATOR_VLAN));
1792 		break;
1793 	case ISCSI_BOOT_ETH_ORIGIN:
1794 		if (dhcp_en)
1795 			rc = snprintf(str, 3, "3\n");
1796 		break;
1797 	default:
1798 		rc = 0;
1799 		break;
1800 	}
1801 
1802 	return rc;
1803 }
1804 
1805 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
1806 {
1807 	int rc = 1;
1808 
1809 	switch (type) {
1810 	case ISCSI_BOOT_ETH_FLAGS:
1811 	case ISCSI_BOOT_ETH_MAC:
1812 	case ISCSI_BOOT_ETH_INDEX:
1813 	case ISCSI_BOOT_ETH_IP_ADDR:
1814 	case ISCSI_BOOT_ETH_SUBNET_MASK:
1815 	case ISCSI_BOOT_ETH_GATEWAY:
1816 	case ISCSI_BOOT_ETH_ORIGIN:
1817 	case ISCSI_BOOT_ETH_VLAN:
1818 		rc = 0444;
1819 		break;
1820 	default:
1821 		rc = 0;
1822 		break;
1823 	}
1824 	return rc;
1825 }
1826 
1827 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
1828 {
1829 	struct qedi_ctx *qedi = data;
1830 	struct nvm_iscsi_initiator *initiator;
1831 	char *str = buf;
1832 	int rc;
1833 	struct nvm_iscsi_block *block;
1834 
1835 	block = qedi_get_nvram_block(qedi);
1836 	if (!block)
1837 		return 0;
1838 
1839 	initiator = &block->initiator;
1840 
1841 	switch (type) {
1842 	case ISCSI_BOOT_INI_INITIATOR_NAME:
1843 		rc = snprintf(str, NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN, "%s\n",
1844 			      initiator->initiator_name.byte);
1845 		break;
1846 	default:
1847 		rc = 0;
1848 		break;
1849 	}
1850 	return rc;
1851 }
1852 
1853 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
1854 {
1855 	int rc;
1856 
1857 	switch (type) {
1858 	case ISCSI_BOOT_INI_INITIATOR_NAME:
1859 		rc = 0444;
1860 		break;
1861 	default:
1862 		rc = 0;
1863 		break;
1864 	}
1865 	return rc;
1866 }
1867 
1868 static ssize_t
1869 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
1870 			char *buf, enum qedi_nvm_tgts idx)
1871 {
1872 	char *str = buf;
1873 	int rc = 1;
1874 	u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
1875 	struct nvm_iscsi_block *block;
1876 	char *chap_name, *chap_secret;
1877 	char *mchap_name, *mchap_secret;
1878 
1879 	block = qedi_get_nvram_block(qedi);
1880 	if (!block)
1881 		goto exit_show_tgt_info;
1882 
1883 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1884 		  "Port:%d, tgt_idx:%d\n",
1885 		  GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
1886 
1887 	ctrl_flags = block->target[idx].ctrl_flags &
1888 		     NVM_ISCSI_CFG_TARGET_ENABLED;
1889 
1890 	if (!ctrl_flags) {
1891 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1892 			  "Target disabled\n");
1893 		goto exit_show_tgt_info;
1894 	}
1895 
1896 	ipv6_en = block->generic.ctrl_flags &
1897 		  NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1898 	ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1899 	chap_en = block->generic.ctrl_flags &
1900 		  NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
1901 	chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
1902 	chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
1903 
1904 	mchap_en = block->generic.ctrl_flags &
1905 		  NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
1906 	mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
1907 	mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
1908 
1909 	switch (type) {
1910 	case ISCSI_BOOT_TGT_NAME:
1911 		rc = snprintf(str, NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN, "%s\n",
1912 			      block->target[idx].target_name.byte);
1913 		break;
1914 	case ISCSI_BOOT_TGT_IP_ADDR:
1915 		if (ipv6_en)
1916 			rc = snprintf(str, ip_len, "%pI6\n",
1917 				      block->target[idx].ipv6_addr.byte);
1918 		else
1919 			rc = snprintf(str, ip_len, "%pI4\n",
1920 				      block->target[idx].ipv4_addr.byte);
1921 		break;
1922 	case ISCSI_BOOT_TGT_PORT:
1923 		rc = snprintf(str, 12, "%d\n",
1924 			      GET_FIELD2(block->target[idx].generic_cont0,
1925 					 NVM_ISCSI_CFG_TARGET_TCP_PORT));
1926 		break;
1927 	case ISCSI_BOOT_TGT_LUN:
1928 		rc = snprintf(str, 22, "%.*d\n",
1929 			      block->target[idx].lun.value[1],
1930 			      block->target[idx].lun.value[0]);
1931 		break;
1932 	case ISCSI_BOOT_TGT_CHAP_NAME:
1933 		rc = snprintf(str, NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, "%s\n",
1934 			      chap_name);
1935 		break;
1936 	case ISCSI_BOOT_TGT_CHAP_SECRET:
1937 		rc = snprintf(str, NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN, "%s\n",
1938 			      chap_secret);
1939 		break;
1940 	case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1941 		rc = snprintf(str, NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, "%s\n",
1942 			      mchap_name);
1943 		break;
1944 	case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1945 		rc = snprintf(str, NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN, "%s\n",
1946 			      mchap_secret);
1947 		break;
1948 	case ISCSI_BOOT_TGT_FLAGS:
1949 		rc = snprintf(str, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
1950 		break;
1951 	case ISCSI_BOOT_TGT_NIC_ASSOC:
1952 		rc = snprintf(str, 3, "0\n");
1953 		break;
1954 	default:
1955 		rc = 0;
1956 		break;
1957 	}
1958 
1959 exit_show_tgt_info:
1960 	return rc;
1961 }
1962 
1963 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
1964 {
1965 	struct qedi_ctx *qedi = data;
1966 
1967 	return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
1968 }
1969 
1970 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
1971 {
1972 	struct qedi_ctx *qedi = data;
1973 
1974 	return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
1975 }
1976 
1977 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
1978 {
1979 	int rc;
1980 
1981 	switch (type) {
1982 	case ISCSI_BOOT_TGT_NAME:
1983 	case ISCSI_BOOT_TGT_IP_ADDR:
1984 	case ISCSI_BOOT_TGT_PORT:
1985 	case ISCSI_BOOT_TGT_LUN:
1986 	case ISCSI_BOOT_TGT_CHAP_NAME:
1987 	case ISCSI_BOOT_TGT_CHAP_SECRET:
1988 	case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1989 	case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1990 	case ISCSI_BOOT_TGT_NIC_ASSOC:
1991 	case ISCSI_BOOT_TGT_FLAGS:
1992 		rc = 0444;
1993 		break;
1994 	default:
1995 		rc = 0;
1996 		break;
1997 	}
1998 	return rc;
1999 }
2000 
2001 static void qedi_boot_release(void *data)
2002 {
2003 	struct qedi_ctx *qedi = data;
2004 
2005 	scsi_host_put(qedi->shost);
2006 }
2007 
2008 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2009 {
2010 	int ret = 1;
2011 	u16 len;
2012 
2013 	len = sizeof(struct nvm_iscsi_cfg);
2014 
2015 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2016 		  "Get NVM iSCSI CFG image\n");
2017 	ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2018 					      QED_NVM_IMAGE_ISCSI_CFG,
2019 					      (char *)qedi->iscsi_cfg, len);
2020 	if (ret)
2021 		QEDI_ERR(&qedi->dbg_ctx,
2022 			 "Could not get NVM image. ret = %d\n", ret);
2023 
2024 	return ret;
2025 }
2026 
2027 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2028 {
2029 	struct iscsi_boot_kobj *boot_kobj;
2030 
2031 	if (qedi_get_boot_info(qedi))
2032 		return -EPERM;
2033 
2034 	qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2035 	if (!qedi->boot_kset)
2036 		goto kset_free;
2037 
2038 	if (!scsi_host_get(qedi->shost))
2039 		goto kset_free;
2040 
2041 	boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2042 					     qedi_show_boot_tgt_pri_info,
2043 					     qedi_tgt_get_attr_visibility,
2044 					     qedi_boot_release);
2045 	if (!boot_kobj)
2046 		goto put_host;
2047 
2048 	if (!scsi_host_get(qedi->shost))
2049 		goto kset_free;
2050 
2051 	boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2052 					     qedi_show_boot_tgt_sec_info,
2053 					     qedi_tgt_get_attr_visibility,
2054 					     qedi_boot_release);
2055 	if (!boot_kobj)
2056 		goto put_host;
2057 
2058 	if (!scsi_host_get(qedi->shost))
2059 		goto kset_free;
2060 
2061 	boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2062 						qedi_show_boot_ini_info,
2063 						qedi_ini_get_attr_visibility,
2064 						qedi_boot_release);
2065 	if (!boot_kobj)
2066 		goto put_host;
2067 
2068 	if (!scsi_host_get(qedi->shost))
2069 		goto kset_free;
2070 
2071 	boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2072 					       qedi_show_boot_eth_info,
2073 					       qedi_eth_get_attr_visibility,
2074 					       qedi_boot_release);
2075 	if (!boot_kobj)
2076 		goto put_host;
2077 
2078 	return 0;
2079 
2080 put_host:
2081 	scsi_host_put(qedi->shost);
2082 kset_free:
2083 	iscsi_boot_destroy_kset(qedi->boot_kset);
2084 	return -ENOMEM;
2085 }
2086 
2087 static void __qedi_remove(struct pci_dev *pdev, int mode)
2088 {
2089 	struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2090 
2091 	if (qedi->tmf_thread) {
2092 		flush_workqueue(qedi->tmf_thread);
2093 		destroy_workqueue(qedi->tmf_thread);
2094 		qedi->tmf_thread = NULL;
2095 	}
2096 
2097 	if (qedi->offload_thread) {
2098 		flush_workqueue(qedi->offload_thread);
2099 		destroy_workqueue(qedi->offload_thread);
2100 		qedi->offload_thread = NULL;
2101 	}
2102 
2103 #ifdef CONFIG_DEBUG_FS
2104 	qedi_dbg_host_exit(&qedi->dbg_ctx);
2105 #endif
2106 	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2107 		qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2108 
2109 	qedi_sync_free_irqs(qedi);
2110 
2111 	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2112 		qedi_ops->stop(qedi->cdev);
2113 		qedi_ops->ll2->stop(qedi->cdev);
2114 	}
2115 
2116 	if (mode == QEDI_MODE_NORMAL)
2117 		qedi_free_iscsi_pf_param(qedi);
2118 
2119 	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2120 		qedi_ops->common->slowpath_stop(qedi->cdev);
2121 		qedi_ops->common->remove(qedi->cdev);
2122 	}
2123 
2124 	qedi_destroy_fp(qedi);
2125 
2126 	if (mode == QEDI_MODE_NORMAL) {
2127 		qedi_release_cid_que(qedi);
2128 		qedi_cm_free_mem(qedi);
2129 		qedi_free_uio(qedi->udev);
2130 		qedi_free_itt(qedi);
2131 
2132 		iscsi_host_remove(qedi->shost);
2133 		iscsi_host_free(qedi->shost);
2134 
2135 		if (qedi->ll2_recv_thread) {
2136 			kthread_stop(qedi->ll2_recv_thread);
2137 			qedi->ll2_recv_thread = NULL;
2138 		}
2139 		qedi_ll2_free_skbs(qedi);
2140 
2141 		if (qedi->boot_kset)
2142 			iscsi_boot_destroy_kset(qedi->boot_kset);
2143 	}
2144 }
2145 
2146 static int __qedi_probe(struct pci_dev *pdev, int mode)
2147 {
2148 	struct qedi_ctx *qedi;
2149 	struct qed_ll2_params params;
2150 	u32 dp_module = 0;
2151 	u8 dp_level = 0;
2152 	bool is_vf = false;
2153 	char host_buf[16];
2154 	struct qed_link_params link_params;
2155 	struct qed_slowpath_params sp_params;
2156 	struct qed_probe_params qed_params;
2157 	void *task_start, *task_end;
2158 	int rc;
2159 	u16 tmp;
2160 
2161 	if (mode != QEDI_MODE_RECOVERY) {
2162 		qedi = qedi_host_alloc(pdev);
2163 		if (!qedi) {
2164 			rc = -ENOMEM;
2165 			goto exit_probe;
2166 		}
2167 	} else {
2168 		qedi = pci_get_drvdata(pdev);
2169 	}
2170 
2171 	memset(&qed_params, 0, sizeof(qed_params));
2172 	qed_params.protocol = QED_PROTOCOL_ISCSI;
2173 	qed_params.dp_module = dp_module;
2174 	qed_params.dp_level = dp_level;
2175 	qed_params.is_vf = is_vf;
2176 	qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2177 	if (!qedi->cdev) {
2178 		rc = -ENODEV;
2179 		QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2180 		goto free_host;
2181 	}
2182 
2183 	atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2184 
2185 	rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2186 	if (rc)
2187 		goto free_host;
2188 
2189 	if (mode != QEDI_MODE_RECOVERY) {
2190 		rc = qedi_set_iscsi_pf_param(qedi);
2191 		if (rc) {
2192 			rc = -ENOMEM;
2193 			QEDI_ERR(&qedi->dbg_ctx,
2194 				 "Set iSCSI pf param fail\n");
2195 			goto free_host;
2196 		}
2197 	}
2198 
2199 	qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2200 
2201 	rc = qedi_prepare_fp(qedi);
2202 	if (rc) {
2203 		QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2204 		goto free_pf_params;
2205 	}
2206 
2207 	/* Start the Slowpath-process */
2208 	memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2209 	sp_params.int_mode = QED_INT_MODE_MSIX;
2210 	sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2211 	sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2212 	sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2213 	sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2214 	strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2215 	rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2216 	if (rc) {
2217 		QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2218 		goto stop_hw;
2219 	}
2220 
2221 	/* update_pf_params needs to be called before and after slowpath
2222 	 * start
2223 	 */
2224 	qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2225 
2226 	rc = qedi_setup_int(qedi);
2227 	if (rc)
2228 		goto stop_iscsi_func;
2229 
2230 	qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2231 
2232 	/* Learn information crucial for qedi to progress */
2233 	rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2234 	if (rc)
2235 		goto stop_iscsi_func;
2236 
2237 	/* Record BDQ producer doorbell addresses */
2238 	qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2239 	qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2240 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2241 		  "BDQ primary_prod=%p secondary_prod=%p.\n",
2242 		  qedi->bdq_primary_prod,
2243 		  qedi->bdq_secondary_prod);
2244 
2245 	/*
2246 	 * We need to write the number of BDs in the BDQ we've preallocated so
2247 	 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2248 	 * packet arrives.
2249 	 */
2250 	qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2251 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2252 		  "Writing %d to primary and secondary BDQ doorbell registers.\n",
2253 		  qedi->bdq_prod_idx);
2254 	writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2255 	tmp = readw(qedi->bdq_primary_prod);
2256 	writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2257 	tmp = readw(qedi->bdq_secondary_prod);
2258 
2259 	ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2260 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2261 		  qedi->mac);
2262 
2263 	sprintf(host_buf, "host_%d", qedi->shost->host_no);
2264 	qedi_ops->common->set_name(qedi->cdev, host_buf);
2265 
2266 	qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2267 
2268 	memset(&params, 0, sizeof(params));
2269 	params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2270 	qedi->ll2_mtu = DEF_PATH_MTU;
2271 	params.drop_ttl0_packets = 0;
2272 	params.rx_vlan_stripping = 1;
2273 	ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2274 
2275 	if (mode != QEDI_MODE_RECOVERY) {
2276 		/* set up rx path */
2277 		INIT_LIST_HEAD(&qedi->ll2_skb_list);
2278 		spin_lock_init(&qedi->ll2_lock);
2279 		/* start qedi context */
2280 		spin_lock_init(&qedi->hba_lock);
2281 		spin_lock_init(&qedi->task_idx_lock);
2282 	}
2283 	qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2284 	qedi_ops->ll2->start(qedi->cdev, &params);
2285 
2286 	if (mode != QEDI_MODE_RECOVERY) {
2287 		qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2288 						    (void *)qedi,
2289 						    "qedi_ll2_thread");
2290 	}
2291 
2292 	rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2293 			     qedi, qedi_iscsi_event_cb);
2294 	if (rc) {
2295 		rc = -ENODEV;
2296 		QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2297 		goto stop_slowpath;
2298 	}
2299 
2300 	task_start = qedi_get_task_mem(&qedi->tasks, 0);
2301 	task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2302 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2303 		  "Task context start=%p, end=%p block_size=%u.\n",
2304 		   task_start, task_end, qedi->tasks.size);
2305 
2306 	memset(&link_params, 0, sizeof(link_params));
2307 	link_params.link_up = true;
2308 	rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2309 	if (rc) {
2310 		QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2311 		atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2312 	}
2313 
2314 #ifdef CONFIG_DEBUG_FS
2315 	qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
2316 			   &qedi_dbg_fops);
2317 #endif
2318 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2319 		  "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2320 		  QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2321 		  FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2322 
2323 	if (mode == QEDI_MODE_NORMAL) {
2324 		if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2325 			QEDI_ERR(&qedi->dbg_ctx,
2326 				 "Could not add iscsi host\n");
2327 			rc = -ENOMEM;
2328 			goto remove_host;
2329 		}
2330 
2331 		/* Allocate uio buffers */
2332 		rc = qedi_alloc_uio_rings(qedi);
2333 		if (rc) {
2334 			QEDI_ERR(&qedi->dbg_ctx,
2335 				 "UIO alloc ring failed err=%d\n", rc);
2336 			goto remove_host;
2337 		}
2338 
2339 		rc = qedi_init_uio(qedi);
2340 		if (rc) {
2341 			QEDI_ERR(&qedi->dbg_ctx,
2342 				 "UIO init failed, err=%d\n", rc);
2343 			goto free_uio;
2344 		}
2345 
2346 		/* host the array on iscsi_conn */
2347 		rc = qedi_setup_cid_que(qedi);
2348 		if (rc) {
2349 			QEDI_ERR(&qedi->dbg_ctx,
2350 				 "Could not setup cid que\n");
2351 			goto free_uio;
2352 		}
2353 
2354 		rc = qedi_cm_alloc_mem(qedi);
2355 		if (rc) {
2356 			QEDI_ERR(&qedi->dbg_ctx,
2357 				 "Could not alloc cm memory\n");
2358 			goto free_cid_que;
2359 		}
2360 
2361 		rc = qedi_alloc_itt(qedi);
2362 		if (rc) {
2363 			QEDI_ERR(&qedi->dbg_ctx,
2364 				 "Could not alloc itt memory\n");
2365 			goto free_cid_que;
2366 		}
2367 
2368 		sprintf(host_buf, "host_%d", qedi->shost->host_no);
2369 		qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2370 		if (!qedi->tmf_thread) {
2371 			QEDI_ERR(&qedi->dbg_ctx,
2372 				 "Unable to start tmf thread!\n");
2373 			rc = -ENODEV;
2374 			goto free_cid_que;
2375 		}
2376 
2377 		sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2378 		qedi->offload_thread = create_workqueue(host_buf);
2379 		if (!qedi->offload_thread) {
2380 			QEDI_ERR(&qedi->dbg_ctx,
2381 				 "Unable to start offload thread!\n");
2382 			rc = -ENODEV;
2383 			goto free_cid_que;
2384 		}
2385 
2386 		/* F/w needs 1st task context memory entry for performance */
2387 		set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2388 		atomic_set(&qedi->num_offloads, 0);
2389 
2390 		if (qedi_setup_boot_info(qedi))
2391 			QEDI_ERR(&qedi->dbg_ctx,
2392 				 "No iSCSI boot target configured\n");
2393 	}
2394 
2395 	return 0;
2396 
2397 free_cid_que:
2398 	qedi_release_cid_que(qedi);
2399 free_uio:
2400 	qedi_free_uio(qedi->udev);
2401 remove_host:
2402 #ifdef CONFIG_DEBUG_FS
2403 	qedi_dbg_host_exit(&qedi->dbg_ctx);
2404 #endif
2405 	iscsi_host_remove(qedi->shost);
2406 stop_iscsi_func:
2407 	qedi_ops->stop(qedi->cdev);
2408 stop_slowpath:
2409 	qedi_ops->common->slowpath_stop(qedi->cdev);
2410 stop_hw:
2411 	qedi_ops->common->remove(qedi->cdev);
2412 free_pf_params:
2413 	qedi_free_iscsi_pf_param(qedi);
2414 free_host:
2415 	iscsi_host_free(qedi->shost);
2416 exit_probe:
2417 	return rc;
2418 }
2419 
2420 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2421 {
2422 	return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2423 }
2424 
2425 static void qedi_remove(struct pci_dev *pdev)
2426 {
2427 	__qedi_remove(pdev, QEDI_MODE_NORMAL);
2428 }
2429 
2430 static struct pci_device_id qedi_pci_tbl[] = {
2431 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2432 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2433 	{ 0 },
2434 };
2435 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2436 
2437 static enum cpuhp_state qedi_cpuhp_state;
2438 
2439 static struct pci_driver qedi_pci_driver = {
2440 	.name = QEDI_MODULE_NAME,
2441 	.id_table = qedi_pci_tbl,
2442 	.probe = qedi_probe,
2443 	.remove = qedi_remove,
2444 };
2445 
2446 static int __init qedi_init(void)
2447 {
2448 	struct qedi_percpu_s *p;
2449 	int cpu, rc = 0;
2450 
2451 	qedi_ops = qed_get_iscsi_ops();
2452 	if (!qedi_ops) {
2453 		QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2454 		return -EINVAL;
2455 	}
2456 
2457 #ifdef CONFIG_DEBUG_FS
2458 	qedi_dbg_init("qedi");
2459 #endif
2460 
2461 	qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2462 	if (!qedi_scsi_transport) {
2463 		QEDI_ERR(NULL, "Could not register qedi transport");
2464 		rc = -ENOMEM;
2465 		goto exit_qedi_init_1;
2466 	}
2467 
2468 	for_each_possible_cpu(cpu) {
2469 		p = &per_cpu(qedi_percpu, cpu);
2470 		INIT_LIST_HEAD(&p->work_list);
2471 		spin_lock_init(&p->p_work_lock);
2472 		p->iothread = NULL;
2473 	}
2474 
2475 	rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2476 			       qedi_cpu_online, qedi_cpu_offline);
2477 	if (rc < 0)
2478 		goto exit_qedi_init_2;
2479 	qedi_cpuhp_state = rc;
2480 
2481 	rc = pci_register_driver(&qedi_pci_driver);
2482 	if (rc) {
2483 		QEDI_ERR(NULL, "Failed to register driver\n");
2484 		goto exit_qedi_hp;
2485 	}
2486 
2487 	return 0;
2488 
2489 exit_qedi_hp:
2490 	cpuhp_remove_state(qedi_cpuhp_state);
2491 exit_qedi_init_2:
2492 	iscsi_unregister_transport(&qedi_iscsi_transport);
2493 exit_qedi_init_1:
2494 #ifdef CONFIG_DEBUG_FS
2495 	qedi_dbg_exit();
2496 #endif
2497 	qed_put_iscsi_ops();
2498 	return rc;
2499 }
2500 
2501 static void __exit qedi_cleanup(void)
2502 {
2503 	pci_unregister_driver(&qedi_pci_driver);
2504 	cpuhp_remove_state(qedi_cpuhp_state);
2505 	iscsi_unregister_transport(&qedi_iscsi_transport);
2506 
2507 #ifdef CONFIG_DEBUG_FS
2508 	qedi_dbg_exit();
2509 #endif
2510 	qed_put_iscsi_ops();
2511 }
2512 
2513 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2514 MODULE_LICENSE("GPL");
2515 MODULE_AUTHOR("QLogic Corporation");
2516 MODULE_VERSION(QEDI_MODULE_VERSION);
2517 module_init(qedi_init);
2518 module_exit(qedi_cleanup);
2519