2 * This file is part of the Chelsio FCoE driver for Linux.
4 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/pci.h>
41 #include <linux/aer.h>
43 #include <linux/notifier.h>
44 #include <linux/kdebug.h>
45 #include <linux/seq_file.h>
46 #include <linux/debugfs.h>
47 #include <linux/string.h>
48 #include <linux/export.h>
50 #include "csio_init.h"
51 #include "csio_defs.h"
53 #define CSIO_MIN_MEMPOOL_SZ 64
55 static struct dentry
*csio_debugfs_root
;
57 static struct scsi_transport_template
*csio_fcoe_transport
;
58 static struct scsi_transport_template
*csio_fcoe_transport_vport
;
64 csio_mem_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
67 loff_t avail
= file_inode(file
)->i_size
;
68 unsigned int mem
= (uintptr_t)file
->private_data
& 3;
69 struct csio_hw
*hw
= file
->private_data
- mem
;
75 if (count
> avail
- pos
)
84 ret
= hw
->chip_ops
->chip_mc_read(hw
, 0, pos
,
87 ret
= hw
->chip_ops
->chip_edc_read(hw
, mem
, pos
,
92 ofst
= pos
% sizeof(data
);
93 len
= min(count
, sizeof(data
) - ofst
);
94 if (copy_to_user(buf
, (u8
*)data
+ ofst
, len
))
106 static const struct file_operations csio_mem_debugfs_fops
= {
107 .owner
= THIS_MODULE
,
109 .read
= csio_mem_read
,
110 .llseek
= default_llseek
,
113 void csio_add_debugfs_mem(struct csio_hw
*hw
, const char *name
,
114 unsigned int idx
, unsigned int size_mb
)
116 debugfs_create_file_size(name
, S_IRUSR
, hw
->debugfs_root
,
117 (void *)hw
+ idx
, &csio_mem_debugfs_fops
,
121 static int csio_setup_debugfs(struct csio_hw
*hw
)
125 if (IS_ERR_OR_NULL(hw
->debugfs_root
))
128 i
= csio_rd_reg32(hw
, MA_TARGET_MEM_ENABLE_A
);
129 if (i
& EDRAM0_ENABLE_F
)
130 csio_add_debugfs_mem(hw
, "edc0", MEM_EDC0
, 5);
131 if (i
& EDRAM1_ENABLE_F
)
132 csio_add_debugfs_mem(hw
, "edc1", MEM_EDC1
, 5);
134 hw
->chip_ops
->chip_dfs_create_ext_mem(hw
);
139 * csio_dfs_create - Creates and sets up per-hw debugfs.
143 csio_dfs_create(struct csio_hw
*hw
)
145 if (csio_debugfs_root
) {
146 hw
->debugfs_root
= debugfs_create_dir(pci_name(hw
->pdev
),
148 csio_setup_debugfs(hw
);
155 * csio_dfs_destroy - Destroys per-hw debugfs.
158 csio_dfs_destroy(struct csio_hw
*hw
)
160 if (hw
->debugfs_root
)
161 debugfs_remove_recursive(hw
->debugfs_root
);
167 * csio_dfs_init - Debug filesystem initialization for the module.
173 csio_debugfs_root
= debugfs_create_dir(KBUILD_MODNAME
, NULL
);
177 * csio_dfs_exit - debugfs cleanup for the module.
182 debugfs_remove(csio_debugfs_root
);
186 * csio_pci_init - PCI initialization.
188 * @bars: Bitmask of bars to be requested.
190 * Initializes the PCI function by enabling MMIO, setting bus
191 * mastership and setting DMA mask.
194 csio_pci_init(struct pci_dev
*pdev
, int *bars
)
198 *bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
200 if (pci_enable_device_mem(pdev
))
203 if (pci_request_selected_regions(pdev
, *bars
, KBUILD_MODNAME
))
204 goto err_disable_device
;
206 pci_set_master(pdev
);
207 pci_try_set_mwi(pdev
);
209 rv
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(64));
211 rv
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
214 dev_err(&pdev
->dev
, "No suitable DMA available.\n");
215 goto err_release_regions
;
221 pci_release_selected_regions(pdev
, *bars
);
223 pci_disable_device(pdev
);
230 * csio_pci_exit - PCI unitialization.
232 * @bars: Bars to be released.
236 csio_pci_exit(struct pci_dev
*pdev
, int *bars
)
238 pci_release_selected_regions(pdev
, *bars
);
239 pci_disable_device(pdev
);
243 * csio_hw_init_workers - Initialize the HW module's worker threads.
248 csio_hw_init_workers(struct csio_hw
*hw
)
250 INIT_WORK(&hw
->evtq_work
, csio_evtq_worker
);
254 csio_hw_exit_workers(struct csio_hw
*hw
)
256 cancel_work_sync(&hw
->evtq_work
);
260 csio_create_queues(struct csio_hw
*hw
)
263 struct csio_mgmtm
*mgmtm
= csio_hw_to_mgmtm(hw
);
265 struct csio_scsi_cpu_info
*info
;
267 if (hw
->flags
& CSIO_HWF_Q_FW_ALLOCED
)
270 if (hw
->intr_mode
!= CSIO_IM_MSIX
) {
271 rv
= csio_wr_iq_create(hw
, NULL
, hw
->intr_iq_idx
,
272 0, hw
->pport
[0].portid
, false, NULL
);
274 csio_err(hw
, " Forward Interrupt IQ failed!: %d\n", rv
);
280 rv
= csio_wr_iq_create(hw
, NULL
, hw
->fwevt_iq_idx
,
281 csio_get_fwevt_intr_idx(hw
),
282 hw
->pport
[0].portid
, true, NULL
);
284 csio_err(hw
, "FW event IQ config failed!: %d\n", rv
);
288 /* Create mgmt queue */
289 rv
= csio_wr_eq_create(hw
, NULL
, mgmtm
->eq_idx
,
290 mgmtm
->iq_idx
, hw
->pport
[0].portid
, NULL
);
293 csio_err(hw
, "Mgmt EQ create failed!: %d\n", rv
);
297 /* Create SCSI queues */
298 for (i
= 0; i
< hw
->num_pports
; i
++) {
299 info
= &hw
->scsi_cpu_info
[i
];
301 for (j
= 0; j
< info
->max_cpus
; j
++) {
302 struct csio_scsi_qset
*sqset
= &hw
->sqset
[i
][j
];
304 rv
= csio_wr_iq_create(hw
, NULL
, sqset
->iq_idx
,
305 sqset
->intr_idx
, i
, false, NULL
);
308 "SCSI module IQ config failed [%d][%d]:%d\n",
312 rv
= csio_wr_eq_create(hw
, NULL
, sqset
->eq_idx
,
313 sqset
->iq_idx
, i
, NULL
);
316 "SCSI module EQ config failed [%d][%d]:%d\n",
321 } /* For all ports */
323 hw
->flags
|= CSIO_HWF_Q_FW_ALLOCED
;
326 csio_wr_destroy_queues(hw
, true);
331 * csio_config_queues - Configure the DMA queues.
334 * Allocates memory for queues are registers them with FW.
337 csio_config_queues(struct csio_hw
*hw
)
339 int i
, j
, idx
, k
= 0;
341 struct csio_scsi_qset
*sqset
;
342 struct csio_mgmtm
*mgmtm
= csio_hw_to_mgmtm(hw
);
343 struct csio_scsi_qset
*orig
;
344 struct csio_scsi_cpu_info
*info
;
346 if (hw
->flags
& CSIO_HWF_Q_MEM_ALLOCED
)
347 return csio_create_queues(hw
);
349 /* Calculate number of SCSI queues for MSIX we would like */
350 hw
->num_scsi_msix_cpus
= num_online_cpus();
351 hw
->num_sqsets
= num_online_cpus() * hw
->num_pports
;
353 if (hw
->num_sqsets
> CSIO_MAX_SCSI_QSETS
) {
354 hw
->num_sqsets
= CSIO_MAX_SCSI_QSETS
;
355 hw
->num_scsi_msix_cpus
= CSIO_MAX_SCSI_CPU
;
358 /* Initialize max_cpus, may get reduced during msix allocations */
359 for (i
= 0; i
< hw
->num_pports
; i
++)
360 hw
->scsi_cpu_info
[i
].max_cpus
= hw
->num_scsi_msix_cpus
;
362 csio_dbg(hw
, "nsqsets:%d scpus:%d\n",
363 hw
->num_sqsets
, hw
->num_scsi_msix_cpus
);
365 csio_intr_enable(hw
);
367 if (hw
->intr_mode
!= CSIO_IM_MSIX
) {
369 /* Allocate Forward interrupt iq. */
370 hw
->intr_iq_idx
= csio_wr_alloc_q(hw
, CSIO_INTR_IQSIZE
,
371 CSIO_INTR_WRSIZE
, CSIO_INGRESS
,
372 (void *)hw
, 0, 0, NULL
);
373 if (hw
->intr_iq_idx
== -1) {
375 "Forward interrupt queue creation failed\n");
380 /* Allocate the FW evt queue */
381 hw
->fwevt_iq_idx
= csio_wr_alloc_q(hw
, CSIO_FWEVT_IQSIZE
,
383 CSIO_INGRESS
, (void *)hw
,
384 CSIO_FWEVT_FLBUFS
, 0,
385 csio_fwevt_intx_handler
);
386 if (hw
->fwevt_iq_idx
== -1) {
387 csio_err(hw
, "FW evt queue creation failed\n");
391 /* Allocate the mgmt queue */
392 mgmtm
->eq_idx
= csio_wr_alloc_q(hw
, CSIO_MGMT_EQSIZE
,
394 CSIO_EGRESS
, (void *)hw
, 0, 0, NULL
);
395 if (mgmtm
->eq_idx
== -1) {
396 csio_err(hw
, "Failed to alloc egress queue for mgmt module\n");
400 /* Use FW IQ for MGMT req completion */
401 mgmtm
->iq_idx
= hw
->fwevt_iq_idx
;
403 /* Allocate SCSI queues */
404 for (i
= 0; i
< hw
->num_pports
; i
++) {
405 info
= &hw
->scsi_cpu_info
[i
];
407 for (j
= 0; j
< hw
->num_scsi_msix_cpus
; j
++) {
408 sqset
= &hw
->sqset
[i
][j
];
410 if (j
>= info
->max_cpus
) {
411 k
= j
% info
->max_cpus
;
412 orig
= &hw
->sqset
[i
][k
];
413 sqset
->eq_idx
= orig
->eq_idx
;
414 sqset
->iq_idx
= orig
->iq_idx
;
418 idx
= csio_wr_alloc_q(hw
, csio_scsi_eqsize
, 0,
419 CSIO_EGRESS
, (void *)hw
, 0, 0,
422 csio_err(hw
, "EQ creation failed for idx:%d\n",
429 idx
= csio_wr_alloc_q(hw
, CSIO_SCSI_IQSIZE
,
430 CSIO_SCSI_IQ_WRSZ
, CSIO_INGRESS
,
432 csio_scsi_intx_handler
);
434 csio_err(hw
, "IQ creation failed for idx:%d\n",
440 } /* For all ports */
442 hw
->flags
|= CSIO_HWF_Q_MEM_ALLOCED
;
444 rv
= csio_create_queues(hw
);
449 * Now request IRQs for the vectors. In the event of a failure,
450 * cleanup is handled internally by this function.
452 rv
= csio_request_irqs(hw
);
459 csio_intr_disable(hw
, false);
465 csio_resource_alloc(struct csio_hw
*hw
)
467 struct csio_wrm
*wrm
= csio_hw_to_wrm(hw
);
470 wrm
->num_q
= ((CSIO_MAX_SCSI_QSETS
* 2) + CSIO_HW_NIQ
+
471 CSIO_HW_NEQ
+ CSIO_HW_NFLQ
+ CSIO_HW_NINTXQ
);
473 hw
->mb_mempool
= mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ
,
474 sizeof(struct csio_mb
));
478 hw
->rnode_mempool
= mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ
,
479 sizeof(struct csio_rnode
));
480 if (!hw
->rnode_mempool
)
481 goto err_free_mb_mempool
;
483 hw
->scsi_dma_pool
= dma_pool_create("csio_scsi_dma_pool",
484 &hw
->pdev
->dev
, CSIO_SCSI_RSP_LEN
,
486 if (!hw
->scsi_dma_pool
)
487 goto err_free_rn_pool
;
492 mempool_destroy(hw
->rnode_mempool
);
493 hw
->rnode_mempool
= NULL
;
495 mempool_destroy(hw
->mb_mempool
);
496 hw
->mb_mempool
= NULL
;
502 csio_resource_free(struct csio_hw
*hw
)
504 dma_pool_destroy(hw
->scsi_dma_pool
);
505 hw
->scsi_dma_pool
= NULL
;
506 mempool_destroy(hw
->rnode_mempool
);
507 hw
->rnode_mempool
= NULL
;
508 mempool_destroy(hw
->mb_mempool
);
509 hw
->mb_mempool
= NULL
;
513 * csio_hw_alloc - Allocate and initialize the HW module.
516 * Allocates HW structure, DMA, memory resources, maps BARS to
517 * host memory and initializes HW module.
519 static struct csio_hw
*csio_hw_alloc(struct pci_dev
*pdev
)
523 hw
= kzalloc(sizeof(struct csio_hw
), GFP_KERNEL
);
528 strncpy(hw
->drv_version
, CSIO_DRV_VERSION
, 32);
530 /* memory pool/DMA pool allocation */
531 if (csio_resource_alloc(hw
))
534 /* Get the start address of registers from BAR 0 */
535 hw
->regstart
= ioremap_nocache(pci_resource_start(pdev
, 0),
536 pci_resource_len(pdev
, 0));
538 csio_err(hw
, "Could not map BAR 0, regstart = %p\n",
540 goto err_resource_free
;
543 csio_hw_init_workers(hw
);
545 if (csio_hw_init(hw
))
550 csio_dbg(hw
, "hw:%p\n", hw
);
555 csio_hw_exit_workers(hw
);
556 iounmap(hw
->regstart
);
558 csio_resource_free(hw
);
566 * csio_hw_free - Uninitialize and free the HW module.
569 * Disable interrupts, uninit the HW module, free resources, free hw.
572 csio_hw_free(struct csio_hw
*hw
)
574 csio_intr_disable(hw
, true);
575 csio_hw_exit_workers(hw
);
577 iounmap(hw
->regstart
);
578 csio_dfs_destroy(hw
);
579 csio_resource_free(hw
);
584 * csio_shost_init - Create and initialize the lnode module.
585 * @hw: The HW module.
586 * @dev: The device associated with this invocation.
587 * @probe: Called from probe context or not?
588 * @os_pln: Parent lnode if any.
590 * Allocates lnode structure via scsi_host_alloc, initializes
591 * shost, initializes lnode module and registers with SCSI ML
592 * via scsi_host_add. This function is shared between physical and
593 * virtual node ports.
596 csio_shost_init(struct csio_hw
*hw
, struct device
*dev
,
597 bool probe
, struct csio_lnode
*pln
)
599 struct Scsi_Host
*shost
= NULL
;
600 struct csio_lnode
*ln
;
602 csio_fcoe_shost_template
.cmd_per_lun
= csio_lun_qdepth
;
603 csio_fcoe_shost_vport_template
.cmd_per_lun
= csio_lun_qdepth
;
606 * hw->pdev is the physical port's PCI dev structure,
607 * which will be different from the NPIV dev structure.
609 if (dev
== &hw
->pdev
->dev
)
610 shost
= scsi_host_alloc(
611 &csio_fcoe_shost_template
,
612 sizeof(struct csio_lnode
));
614 shost
= scsi_host_alloc(
615 &csio_fcoe_shost_vport_template
,
616 sizeof(struct csio_lnode
));
621 ln
= shost_priv(shost
);
622 memset(ln
, 0, sizeof(struct csio_lnode
));
624 /* Link common lnode to this lnode */
625 ln
->dev_num
= (shost
->host_no
<< 16);
627 shost
->can_queue
= CSIO_MAX_QUEUE
;
629 shost
->unique_id
= shost
->host_no
;
630 shost
->max_cmd_len
= 16; /* Max CDB length supported */
631 shost
->max_id
= min_t(uint32_t, csio_fcoe_rnodes
,
632 hw
->fres_info
.max_ssns
);
633 shost
->max_lun
= CSIO_MAX_LUN
;
634 if (dev
== &hw
->pdev
->dev
)
635 shost
->transportt
= csio_fcoe_transport
;
637 shost
->transportt
= csio_fcoe_transport_vport
;
643 /* Other initialization here: Common, Transport specific */
644 if (csio_lnode_init(ln
, hw
, pln
))
647 if (scsi_add_host_with_dma(shost
, dev
, &hw
->pdev
->dev
))
655 scsi_host_put(shost
);
661 * csio_shost_exit - De-instantiate the shost.
662 * @ln: The lnode module corresponding to the shost.
666 csio_shost_exit(struct csio_lnode
*ln
)
668 struct Scsi_Host
*shost
= csio_ln_to_shost(ln
);
669 struct csio_hw
*hw
= csio_lnode_to_hw(ln
);
671 /* Inform transport */
672 fc_remove_host(shost
);
675 scsi_remove_host(shost
);
677 /* Flush all the events, so that any rnode removal events
678 * already queued are all handled, before we remove the lnode.
680 spin_lock_irq(&hw
->lock
);
682 spin_unlock_irq(&hw
->lock
);
685 scsi_host_put(shost
);
689 csio_lnode_alloc(struct csio_hw
*hw
)
691 return csio_shost_init(hw
, &hw
->pdev
->dev
, false, NULL
);
695 csio_lnodes_block_request(struct csio_hw
*hw
)
697 struct Scsi_Host
*shost
;
698 struct csio_lnode
*sln
;
699 struct csio_lnode
*ln
;
700 struct list_head
*cur_ln
, *cur_cln
;
701 struct csio_lnode
**lnode_list
;
704 lnode_list
= kzalloc((sizeof(struct csio_lnode
*) * hw
->num_lns
),
707 csio_err(hw
, "Failed to allocate lnodes_list");
711 spin_lock_irq(&hw
->lock
);
712 /* Traverse sibling lnodes */
713 list_for_each(cur_ln
, &hw
->sln_head
) {
714 sln
= (struct csio_lnode
*) cur_ln
;
715 lnode_list
[cur_cnt
++] = sln
;
717 /* Traverse children lnodes */
718 list_for_each(cur_cln
, &sln
->cln_head
)
719 lnode_list
[cur_cnt
++] = (struct csio_lnode
*) cur_cln
;
721 spin_unlock_irq(&hw
->lock
);
723 for (ii
= 0; ii
< cur_cnt
; ii
++) {
724 csio_dbg(hw
, "Blocking IOs on lnode: %p\n", lnode_list
[ii
]);
726 shost
= csio_ln_to_shost(ln
);
727 scsi_block_requests(shost
);
734 csio_lnodes_unblock_request(struct csio_hw
*hw
)
736 struct csio_lnode
*ln
;
737 struct Scsi_Host
*shost
;
738 struct csio_lnode
*sln
;
739 struct list_head
*cur_ln
, *cur_cln
;
740 struct csio_lnode
**lnode_list
;
743 lnode_list
= kzalloc((sizeof(struct csio_lnode
*) * hw
->num_lns
),
746 csio_err(hw
, "Failed to allocate lnodes_list");
750 spin_lock_irq(&hw
->lock
);
751 /* Traverse sibling lnodes */
752 list_for_each(cur_ln
, &hw
->sln_head
) {
753 sln
= (struct csio_lnode
*) cur_ln
;
754 lnode_list
[cur_cnt
++] = sln
;
756 /* Traverse children lnodes */
757 list_for_each(cur_cln
, &sln
->cln_head
)
758 lnode_list
[cur_cnt
++] = (struct csio_lnode
*) cur_cln
;
760 spin_unlock_irq(&hw
->lock
);
762 for (ii
= 0; ii
< cur_cnt
; ii
++) {
763 csio_dbg(hw
, "unblocking IOs on lnode: %p\n", lnode_list
[ii
]);
765 shost
= csio_ln_to_shost(ln
);
766 scsi_unblock_requests(shost
);
772 csio_lnodes_block_by_port(struct csio_hw
*hw
, uint8_t portid
)
774 struct csio_lnode
*ln
;
775 struct Scsi_Host
*shost
;
776 struct csio_lnode
*sln
;
777 struct list_head
*cur_ln
, *cur_cln
;
778 struct csio_lnode
**lnode_list
;
781 lnode_list
= kzalloc((sizeof(struct csio_lnode
*) * hw
->num_lns
),
784 csio_err(hw
, "Failed to allocate lnodes_list");
788 spin_lock_irq(&hw
->lock
);
789 /* Traverse sibling lnodes */
790 list_for_each(cur_ln
, &hw
->sln_head
) {
791 sln
= (struct csio_lnode
*) cur_ln
;
792 if (sln
->portid
!= portid
)
795 lnode_list
[cur_cnt
++] = sln
;
797 /* Traverse children lnodes */
798 list_for_each(cur_cln
, &sln
->cln_head
)
799 lnode_list
[cur_cnt
++] = (struct csio_lnode
*) cur_cln
;
801 spin_unlock_irq(&hw
->lock
);
803 for (ii
= 0; ii
< cur_cnt
; ii
++) {
804 csio_dbg(hw
, "Blocking IOs on lnode: %p\n", lnode_list
[ii
]);
806 shost
= csio_ln_to_shost(ln
);
807 scsi_block_requests(shost
);
813 csio_lnodes_unblock_by_port(struct csio_hw
*hw
, uint8_t portid
)
815 struct csio_lnode
*ln
;
816 struct Scsi_Host
*shost
;
817 struct csio_lnode
*sln
;
818 struct list_head
*cur_ln
, *cur_cln
;
819 struct csio_lnode
**lnode_list
;
822 lnode_list
= kzalloc((sizeof(struct csio_lnode
*) * hw
->num_lns
),
825 csio_err(hw
, "Failed to allocate lnodes_list");
829 spin_lock_irq(&hw
->lock
);
830 /* Traverse sibling lnodes */
831 list_for_each(cur_ln
, &hw
->sln_head
) {
832 sln
= (struct csio_lnode
*) cur_ln
;
833 if (sln
->portid
!= portid
)
835 lnode_list
[cur_cnt
++] = sln
;
837 /* Traverse children lnodes */
838 list_for_each(cur_cln
, &sln
->cln_head
)
839 lnode_list
[cur_cnt
++] = (struct csio_lnode
*) cur_cln
;
841 spin_unlock_irq(&hw
->lock
);
843 for (ii
= 0; ii
< cur_cnt
; ii
++) {
844 csio_dbg(hw
, "unblocking IOs on lnode: %p\n", lnode_list
[ii
]);
846 shost
= csio_ln_to_shost(ln
);
847 scsi_unblock_requests(shost
);
853 csio_lnodes_exit(struct csio_hw
*hw
, bool npiv
)
855 struct csio_lnode
*sln
;
856 struct csio_lnode
*ln
;
857 struct list_head
*cur_ln
, *cur_cln
;
858 struct csio_lnode
**lnode_list
;
861 lnode_list
= kzalloc((sizeof(struct csio_lnode
*) * hw
->num_lns
),
864 csio_err(hw
, "lnodes_exit: Failed to allocate lnodes_list.\n");
868 /* Get all child lnodes(NPIV ports) */
869 spin_lock_irq(&hw
->lock
);
870 list_for_each(cur_ln
, &hw
->sln_head
) {
871 sln
= (struct csio_lnode
*) cur_ln
;
873 /* Traverse children lnodes */
874 list_for_each(cur_cln
, &sln
->cln_head
)
875 lnode_list
[cur_cnt
++] = (struct csio_lnode
*) cur_cln
;
877 spin_unlock_irq(&hw
->lock
);
879 /* Delete NPIV lnodes */
880 for (ii
= 0; ii
< cur_cnt
; ii
++) {
881 csio_dbg(hw
, "Deleting child lnode: %p\n", lnode_list
[ii
]);
883 fc_vport_terminate(ln
->fc_vport
);
886 /* Delete only npiv lnodes */
891 /* Get all physical lnodes */
892 spin_lock_irq(&hw
->lock
);
893 /* Traverse sibling lnodes */
894 list_for_each(cur_ln
, &hw
->sln_head
) {
895 sln
= (struct csio_lnode
*) cur_ln
;
896 lnode_list
[cur_cnt
++] = sln
;
898 spin_unlock_irq(&hw
->lock
);
900 /* Delete physical lnodes */
901 for (ii
= 0; ii
< cur_cnt
; ii
++) {
902 csio_dbg(hw
, "Deleting parent lnode: %p\n", lnode_list
[ii
]);
903 csio_shost_exit(lnode_list
[ii
]);
911 * csio_lnode_init_post: Set lnode attributes after starting HW.
916 csio_lnode_init_post(struct csio_lnode
*ln
)
918 struct Scsi_Host
*shost
= csio_ln_to_shost(ln
);
920 csio_fchost_attr_init(ln
);
922 scsi_scan_host(shost
);
926 * csio_probe_one - Instantiate this function.
930 * This is the .probe() callback of the driver. This function:
931 * - Initializes the PCI function by enabling MMIO, setting bus
932 * mastership and setting DMA mask.
933 * - Allocates HW structure, DMA, memory resources, maps BARS to
934 * host memory and initializes HW module.
935 * - Allocates lnode structure via scsi_host_alloc, initializes
936 * shost, initialized lnode module and registers with SCSI ML
938 * - Enables interrupts, and starts the chip by kicking off the
940 * - Once hardware is ready, initiated scan of the host via
943 static int csio_probe_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
949 struct csio_lnode
*ln
;
951 /* probe only T5 and T6 cards */
952 if (!csio_is_t5((pdev
->device
& CSIO_HW_CHIP_MASK
)) &&
953 !csio_is_t6((pdev
->device
& CSIO_HW_CHIP_MASK
)))
956 rv
= csio_pci_init(pdev
, &bars
);
960 hw
= csio_hw_alloc(pdev
);
966 if (!pcie_relaxed_ordering_enabled(pdev
))
967 hw
->flags
|= CSIO_HWF_ROOT_NO_RELAXED_ORDERING
;
969 pci_set_drvdata(pdev
, hw
);
971 rv
= csio_hw_start(hw
);
975 "Failed to start FW, continuing in debug mode.\n");
981 sprintf(hw
->fwrev_str
, "%u.%u.%u.%u\n",
982 FW_HDR_FW_VER_MAJOR_G(hw
->fwrev
),
983 FW_HDR_FW_VER_MINOR_G(hw
->fwrev
),
984 FW_HDR_FW_VER_MICRO_G(hw
->fwrev
),
985 FW_HDR_FW_VER_BUILD_G(hw
->fwrev
));
987 for (i
= 0; i
< hw
->num_pports
; i
++) {
988 ln
= csio_shost_init(hw
, &pdev
->dev
, true, NULL
);
993 /* Initialize portid */
994 ln
->portid
= hw
->pport
[i
].portid
;
996 spin_lock_irq(&hw
->lock
);
997 if (csio_lnode_start(ln
) != 0)
999 spin_unlock_irq(&hw
->lock
);
1004 csio_lnode_init_post(ln
);
1008 goto err_lnode_exit
;
1013 csio_lnodes_block_request(hw
);
1014 spin_lock_irq(&hw
->lock
);
1016 spin_unlock_irq(&hw
->lock
);
1017 csio_lnodes_unblock_request(hw
);
1018 csio_lnodes_exit(hw
, 0);
1021 csio_pci_exit(pdev
, &bars
);
1023 dev_err(&pdev
->dev
, "probe of device failed: %d\n", rv
);
1028 * csio_remove_one - Remove one instance of the driver at this PCI function.
1031 * Used during hotplug operation.
1033 static void csio_remove_one(struct pci_dev
*pdev
)
1035 struct csio_hw
*hw
= pci_get_drvdata(pdev
);
1036 int bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
1038 csio_lnodes_block_request(hw
);
1039 spin_lock_irq(&hw
->lock
);
1041 /* Stops lnode, Rnode s/m
1043 * All sessions with remote ports are unregistered.
1046 spin_unlock_irq(&hw
->lock
);
1047 csio_lnodes_unblock_request(hw
);
1049 csio_lnodes_exit(hw
, 0);
1051 csio_pci_exit(pdev
, &bars
);
1055 * csio_pci_error_detected - PCI error was detected
1059 static pci_ers_result_t
1060 csio_pci_error_detected(struct pci_dev
*pdev
, pci_channel_state_t state
)
1062 struct csio_hw
*hw
= pci_get_drvdata(pdev
);
1064 csio_lnodes_block_request(hw
);
1065 spin_lock_irq(&hw
->lock
);
1067 /* Post PCI error detected evt to HW s/m
1068 * HW s/m handles this evt by quiescing IOs, unregisters rports
1069 * and finally takes the device to offline.
1071 csio_post_event(&hw
->sm
, CSIO_HWE_PCIERR_DETECTED
);
1072 spin_unlock_irq(&hw
->lock
);
1073 csio_lnodes_unblock_request(hw
);
1074 csio_lnodes_exit(hw
, 0);
1075 csio_intr_disable(hw
, true);
1076 pci_disable_device(pdev
);
1077 return state
== pci_channel_io_perm_failure
?
1078 PCI_ERS_RESULT_DISCONNECT
: PCI_ERS_RESULT_NEED_RESET
;
1082 * csio_pci_slot_reset - PCI slot has been reset.
1086 static pci_ers_result_t
1087 csio_pci_slot_reset(struct pci_dev
*pdev
)
1089 struct csio_hw
*hw
= pci_get_drvdata(pdev
);
1092 if (pci_enable_device(pdev
)) {
1093 dev_err(&pdev
->dev
, "cannot re-enable device in slot reset\n");
1094 return PCI_ERS_RESULT_DISCONNECT
;
1097 pci_set_master(pdev
);
1098 pci_restore_state(pdev
);
1099 pci_save_state(pdev
);
1101 /* Bring HW s/m to ready state.
1102 * but don't resume IOs.
1104 spin_lock_irq(&hw
->lock
);
1105 csio_post_event(&hw
->sm
, CSIO_HWE_PCIERR_SLOT_RESET
);
1106 ready
= csio_is_hw_ready(hw
);
1107 spin_unlock_irq(&hw
->lock
);
1110 return PCI_ERS_RESULT_RECOVERED
;
1112 dev_err(&pdev
->dev
, "Can't initialize HW when in slot reset\n");
1113 return PCI_ERS_RESULT_DISCONNECT
;
1118 * csio_pci_resume - Resume normal operations
1123 csio_pci_resume(struct pci_dev
*pdev
)
1125 struct csio_hw
*hw
= pci_get_drvdata(pdev
);
1126 struct csio_lnode
*ln
;
1130 /* Bring the LINK UP and Resume IO */
1132 for (i
= 0; i
< hw
->num_pports
; i
++) {
1133 ln
= csio_shost_init(hw
, &pdev
->dev
, true, NULL
);
1138 /* Initialize portid */
1139 ln
->portid
= hw
->pport
[i
].portid
;
1141 spin_lock_irq(&hw
->lock
);
1142 if (csio_lnode_start(ln
) != 0)
1144 spin_unlock_irq(&hw
->lock
);
1149 csio_lnode_init_post(ln
);
1153 goto err_resume_exit
;
1158 csio_lnodes_block_request(hw
);
1159 spin_lock_irq(&hw
->lock
);
1161 spin_unlock_irq(&hw
->lock
);
1162 csio_lnodes_unblock_request(hw
);
1163 csio_lnodes_exit(hw
, 0);
1165 dev_err(&pdev
->dev
, "resume of device failed: %d\n", rv
);
1168 static struct pci_error_handlers csio_err_handler
= {
1169 .error_detected
= csio_pci_error_detected
,
1170 .slot_reset
= csio_pci_slot_reset
,
1171 .resume
= csio_pci_resume
,
1175 * Macros needed to support the PCI Device ID Table ...
1177 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
1178 static const struct pci_device_id csio_pci_tbl[] = {
1179 /* Define for FCoE uses PF6 */
1180 #define CH_PCI_DEVICE_ID_FUNCTION 0x6
1182 #define CH_PCI_ID_TABLE_ENTRY(devid) \
1183 { PCI_VDEVICE(CHELSIO, (devid)), 0 }
1185 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
1187 #include "t4_pci_id_tbl.h"
1189 static struct pci_driver csio_pci_driver
= {
1190 .name
= KBUILD_MODNAME
,
1192 .owner
= THIS_MODULE
,
1194 .id_table
= csio_pci_tbl
,
1195 .probe
= csio_probe_one
,
1196 .remove
= csio_remove_one
,
1197 .err_handler
= &csio_err_handler
,
1201 * csio_init - Chelsio storage driver initialization function.
1209 pr_info("%s %s\n", CSIO_DRV_DESC
, CSIO_DRV_VERSION
);
1213 csio_fcoe_transport
= fc_attach_transport(&csio_fc_transport_funcs
);
1214 if (!csio_fcoe_transport
)
1217 csio_fcoe_transport_vport
=
1218 fc_attach_transport(&csio_fc_transport_vport_funcs
);
1219 if (!csio_fcoe_transport_vport
)
1222 rv
= pci_register_driver(&csio_pci_driver
);
1229 fc_release_transport(csio_fcoe_transport_vport
);
1231 fc_release_transport(csio_fcoe_transport
);
1238 * csio_exit - Chelsio storage driver uninitialization .
1240 * Function that gets called in the unload path.
1245 pci_unregister_driver(&csio_pci_driver
);
1247 fc_release_transport(csio_fcoe_transport_vport
);
1248 fc_release_transport(csio_fcoe_transport
);
1251 module_init(csio_init
);
1252 module_exit(csio_exit
);
1253 MODULE_AUTHOR(CSIO_DRV_AUTHOR
);
1254 MODULE_DESCRIPTION(CSIO_DRV_DESC
);
1255 MODULE_LICENSE("Dual BSD/GPL");
1256 MODULE_DEVICE_TABLE(pci
, csio_pci_tbl
);
1257 MODULE_VERSION(CSIO_DRV_VERSION
);
1258 MODULE_FIRMWARE(FW_FNAME_T5
);
1259 MODULE_FIRMWARE(FW_FNAME_T6
);