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);
174 if (!csio_debugfs_root)
175 pr_warn("Could not create debugfs entry, continuing\n");
181 * csio_dfs_exit - debugfs cleanup for the module.
186 debugfs_remove(csio_debugfs_root);
190 * csio_pci_init - PCI initialization.
192 * @bars: Bitmask of bars to be requested.
194 * Initializes the PCI function by enabling MMIO, setting bus
195 * mastership and setting DMA mask.
198 csio_pci_init(struct pci_dev *pdev, int *bars)
202 *bars = pci_select_bars(pdev, IORESOURCE_MEM);
204 if (pci_enable_device_mem(pdev))
207 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME))
208 goto err_disable_device;
210 pci_set_master(pdev);
211 pci_try_set_mwi(pdev);
213 if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) ||
214 dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) {
215 dev_err(&pdev->dev, "No suitable DMA available.\n");
216 goto err_release_regions;
222 pci_release_selected_regions(pdev, *bars);
224 pci_disable_device(pdev);
231 * csio_pci_exit - PCI unitialization.
233 * @bars: Bars to be released.
237 csio_pci_exit(struct pci_dev *pdev, int *bars)
239 pci_release_selected_regions(pdev, *bars);
240 pci_disable_device(pdev);
244 * csio_hw_init_workers - Initialize the HW module's worker threads.
249 csio_hw_init_workers(struct csio_hw *hw)
251 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
255 csio_hw_exit_workers(struct csio_hw *hw)
257 cancel_work_sync(&hw->evtq_work);
258 flush_scheduled_work();
262 csio_create_queues(struct csio_hw *hw)
265 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
267 struct csio_scsi_cpu_info *info;
269 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
272 if (hw->intr_mode != CSIO_IM_MSIX) {
273 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx,
274 0, hw->pport[0].portid, false, NULL);
276 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
282 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx,
283 csio_get_fwevt_intr_idx(hw),
284 hw->pport[0].portid, true, NULL);
286 csio_err(hw, "FW event IQ config failed!: %d\n", rv);
290 /* Create mgmt queue */
291 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
292 mgmtm->iq_idx, hw->pport[0].portid, NULL);
295 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
299 /* Create SCSI queues */
300 for (i = 0; i < hw->num_pports; i++) {
301 info = &hw->scsi_cpu_info[i];
303 for (j = 0; j < info->max_cpus; j++) {
304 struct csio_scsi_qset *sqset = &hw->sqset[i][j];
306 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
307 sqset->intr_idx, i, false, NULL);
310 "SCSI module IQ config failed [%d][%d]:%d\n",
314 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
315 sqset->iq_idx, i, NULL);
318 "SCSI module EQ config failed [%d][%d]:%d\n",
323 } /* For all ports */
325 hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
328 csio_wr_destroy_queues(hw, true);
333 * csio_config_queues - Configure the DMA queues.
336 * Allocates memory for queues are registers them with FW.
339 csio_config_queues(struct csio_hw *hw)
341 int i, j, idx, k = 0;
343 struct csio_scsi_qset *sqset;
344 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
345 struct csio_scsi_qset *orig;
346 struct csio_scsi_cpu_info *info;
348 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
349 return csio_create_queues(hw);
351 /* Calculate number of SCSI queues for MSIX we would like */
352 hw->num_scsi_msix_cpus = num_online_cpus();
353 hw->num_sqsets = num_online_cpus() * hw->num_pports;
355 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) {
356 hw->num_sqsets = CSIO_MAX_SCSI_QSETS;
357 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU;
360 /* Initialize max_cpus, may get reduced during msix allocations */
361 for (i = 0; i < hw->num_pports; i++)
362 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus;
364 csio_dbg(hw, "nsqsets:%d scpus:%d\n",
365 hw->num_sqsets, hw->num_scsi_msix_cpus);
367 csio_intr_enable(hw);
369 if (hw->intr_mode != CSIO_IM_MSIX) {
371 /* Allocate Forward interrupt iq. */
372 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE,
373 CSIO_INTR_WRSIZE, CSIO_INGRESS,
374 (void *)hw, 0, 0, NULL);
375 if (hw->intr_iq_idx == -1) {
377 "Forward interrupt queue creation failed\n");
382 /* Allocate the FW evt queue */
383 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
385 CSIO_INGRESS, (void *)hw,
386 CSIO_FWEVT_FLBUFS, 0,
387 csio_fwevt_intx_handler);
388 if (hw->fwevt_iq_idx == -1) {
389 csio_err(hw, "FW evt queue creation failed\n");
393 /* Allocate the mgmt queue */
394 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
396 CSIO_EGRESS, (void *)hw, 0, 0, NULL);
397 if (mgmtm->eq_idx == -1) {
398 csio_err(hw, "Failed to alloc egress queue for mgmt module\n");
402 /* Use FW IQ for MGMT req completion */
403 mgmtm->iq_idx = hw->fwevt_iq_idx;
405 /* Allocate SCSI queues */
406 for (i = 0; i < hw->num_pports; i++) {
407 info = &hw->scsi_cpu_info[i];
409 for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
410 sqset = &hw->sqset[i][j];
412 if (j >= info->max_cpus) {
413 k = j % info->max_cpus;
414 orig = &hw->sqset[i][k];
415 sqset->eq_idx = orig->eq_idx;
416 sqset->iq_idx = orig->iq_idx;
420 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
421 CSIO_EGRESS, (void *)hw, 0, 0,
424 csio_err(hw, "EQ creation failed for idx:%d\n",
431 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
432 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
434 csio_scsi_intx_handler);
436 csio_err(hw, "IQ creation failed for idx:%d\n",
442 } /* For all ports */
444 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
446 rv = csio_create_queues(hw);
451 * Now request IRQs for the vectors. In the event of a failure,
452 * cleanup is handled internally by this function.
454 rv = csio_request_irqs(hw);
461 csio_intr_disable(hw, false);
467 csio_resource_alloc(struct csio_hw *hw)
469 struct csio_wrm *wrm = csio_hw_to_wrm(hw);
472 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
473 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
475 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
476 sizeof(struct csio_mb));
480 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
481 sizeof(struct csio_rnode));
482 if (!hw->rnode_mempool)
483 goto err_free_mb_mempool;
485 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool",
486 &hw->pdev->dev, CSIO_SCSI_RSP_LEN,
488 if (!hw->scsi_dma_pool)
489 goto err_free_rn_pool;
494 mempool_destroy(hw->rnode_mempool);
495 hw->rnode_mempool = NULL;
497 mempool_destroy(hw->mb_mempool);
498 hw->mb_mempool = NULL;
504 csio_resource_free(struct csio_hw *hw)
506 dma_pool_destroy(hw->scsi_dma_pool);
507 hw->scsi_dma_pool = NULL;
508 mempool_destroy(hw->rnode_mempool);
509 hw->rnode_mempool = NULL;
510 mempool_destroy(hw->mb_mempool);
511 hw->mb_mempool = NULL;
515 * csio_hw_alloc - Allocate and initialize the HW module.
518 * Allocates HW structure, DMA, memory resources, maps BARS to
519 * host memory and initializes HW module.
521 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
525 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
530 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
532 /* memory pool/DMA pool allocation */
533 if (csio_resource_alloc(hw))
536 /* Get the start address of registers from BAR 0 */
537 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0),
538 pci_resource_len(pdev, 0));
540 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
542 goto err_resource_free;
545 csio_hw_init_workers(hw);
547 if (csio_hw_init(hw))
552 csio_dbg(hw, "hw:%p\n", hw);
557 csio_hw_exit_workers(hw);
558 iounmap(hw->regstart);
560 csio_resource_free(hw);
568 * csio_hw_free - Uninitialize and free the HW module.
571 * Disable interrupts, uninit the HW module, free resources, free hw.
574 csio_hw_free(struct csio_hw *hw)
576 csio_intr_disable(hw, true);
577 csio_hw_exit_workers(hw);
579 iounmap(hw->regstart);
580 csio_dfs_destroy(hw);
581 csio_resource_free(hw);
586 * csio_shost_init - Create and initialize the lnode module.
587 * @hw: The HW module.
588 * @dev: The device associated with this invocation.
589 * @probe: Called from probe context or not?
590 * @os_pln: Parent lnode if any.
592 * Allocates lnode structure via scsi_host_alloc, initializes
593 * shost, initializes lnode module and registers with SCSI ML
594 * via scsi_host_add. This function is shared between physical and
595 * virtual node ports.
598 csio_shost_init(struct csio_hw *hw, struct device *dev,
599 bool probe, struct csio_lnode *pln)
601 struct Scsi_Host *shost = NULL;
602 struct csio_lnode *ln;
604 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
605 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
608 * hw->pdev is the physical port's PCI dev structure,
609 * which will be different from the NPIV dev structure.
611 if (dev == &hw->pdev->dev)
612 shost = scsi_host_alloc(
613 &csio_fcoe_shost_template,
614 sizeof(struct csio_lnode));
616 shost = scsi_host_alloc(
617 &csio_fcoe_shost_vport_template,
618 sizeof(struct csio_lnode));
623 ln = shost_priv(shost);
624 memset(ln, 0, sizeof(struct csio_lnode));
626 /* Link common lnode to this lnode */
627 ln->dev_num = (shost->host_no << 16);
629 shost->can_queue = CSIO_MAX_QUEUE;
631 shost->unique_id = shost->host_no;
632 shost->max_cmd_len = 16; /* Max CDB length supported */
633 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
634 hw->fres_info.max_ssns);
635 shost->max_lun = CSIO_MAX_LUN;
636 if (dev == &hw->pdev->dev)
637 shost->transportt = csio_fcoe_transport;
639 shost->transportt = csio_fcoe_transport_vport;
645 /* Other initialization here: Common, Transport specific */
646 if (csio_lnode_init(ln, hw, pln))
649 if (scsi_add_host(shost, dev))
657 scsi_host_put(shost);
663 * csio_shost_exit - De-instantiate the shost.
664 * @ln: The lnode module corresponding to the shost.
668 csio_shost_exit(struct csio_lnode *ln)
670 struct Scsi_Host *shost = csio_ln_to_shost(ln);
671 struct csio_hw *hw = csio_lnode_to_hw(ln);
673 /* Inform transport */
674 fc_remove_host(shost);
677 scsi_remove_host(shost);
679 /* Flush all the events, so that any rnode removal events
680 * already queued are all handled, before we remove the lnode.
682 spin_lock_irq(&hw->lock);
684 spin_unlock_irq(&hw->lock);
687 scsi_host_put(shost);
691 csio_lnode_alloc(struct csio_hw *hw)
693 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
697 csio_lnodes_block_request(struct csio_hw *hw)
699 struct Scsi_Host *shost;
700 struct csio_lnode *sln;
701 struct csio_lnode *ln;
702 struct list_head *cur_ln, *cur_cln;
703 struct csio_lnode **lnode_list;
706 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
709 csio_err(hw, "Failed to allocate lnodes_list");
713 spin_lock_irq(&hw->lock);
714 /* Traverse sibling lnodes */
715 list_for_each(cur_ln, &hw->sln_head) {
716 sln = (struct csio_lnode *) cur_ln;
717 lnode_list[cur_cnt++] = sln;
719 /* Traverse children lnodes */
720 list_for_each(cur_cln, &sln->cln_head)
721 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
723 spin_unlock_irq(&hw->lock);
725 for (ii = 0; ii < cur_cnt; ii++) {
726 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
728 shost = csio_ln_to_shost(ln);
729 scsi_block_requests(shost);
736 csio_lnodes_unblock_request(struct csio_hw *hw)
738 struct csio_lnode *ln;
739 struct Scsi_Host *shost;
740 struct csio_lnode *sln;
741 struct list_head *cur_ln, *cur_cln;
742 struct csio_lnode **lnode_list;
745 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
748 csio_err(hw, "Failed to allocate lnodes_list");
752 spin_lock_irq(&hw->lock);
753 /* Traverse sibling lnodes */
754 list_for_each(cur_ln, &hw->sln_head) {
755 sln = (struct csio_lnode *) cur_ln;
756 lnode_list[cur_cnt++] = sln;
758 /* Traverse children lnodes */
759 list_for_each(cur_cln, &sln->cln_head)
760 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
762 spin_unlock_irq(&hw->lock);
764 for (ii = 0; ii < cur_cnt; ii++) {
765 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
767 shost = csio_ln_to_shost(ln);
768 scsi_unblock_requests(shost);
774 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
776 struct csio_lnode *ln;
777 struct Scsi_Host *shost;
778 struct csio_lnode *sln;
779 struct list_head *cur_ln, *cur_cln;
780 struct csio_lnode **lnode_list;
783 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
786 csio_err(hw, "Failed to allocate lnodes_list");
790 spin_lock_irq(&hw->lock);
791 /* Traverse sibling lnodes */
792 list_for_each(cur_ln, &hw->sln_head) {
793 sln = (struct csio_lnode *) cur_ln;
794 if (sln->portid != portid)
797 lnode_list[cur_cnt++] = sln;
799 /* Traverse children lnodes */
800 list_for_each(cur_cln, &sln->cln_head)
801 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
803 spin_unlock_irq(&hw->lock);
805 for (ii = 0; ii < cur_cnt; ii++) {
806 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
808 shost = csio_ln_to_shost(ln);
809 scsi_block_requests(shost);
815 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
817 struct csio_lnode *ln;
818 struct Scsi_Host *shost;
819 struct csio_lnode *sln;
820 struct list_head *cur_ln, *cur_cln;
821 struct csio_lnode **lnode_list;
824 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
827 csio_err(hw, "Failed to allocate lnodes_list");
831 spin_lock_irq(&hw->lock);
832 /* Traverse sibling lnodes */
833 list_for_each(cur_ln, &hw->sln_head) {
834 sln = (struct csio_lnode *) cur_ln;
835 if (sln->portid != portid)
837 lnode_list[cur_cnt++] = sln;
839 /* Traverse children lnodes */
840 list_for_each(cur_cln, &sln->cln_head)
841 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
843 spin_unlock_irq(&hw->lock);
845 for (ii = 0; ii < cur_cnt; ii++) {
846 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
848 shost = csio_ln_to_shost(ln);
849 scsi_unblock_requests(shost);
855 csio_lnodes_exit(struct csio_hw *hw, bool npiv)
857 struct csio_lnode *sln;
858 struct csio_lnode *ln;
859 struct list_head *cur_ln, *cur_cln;
860 struct csio_lnode **lnode_list;
863 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
866 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
870 /* Get all child lnodes(NPIV ports) */
871 spin_lock_irq(&hw->lock);
872 list_for_each(cur_ln, &hw->sln_head) {
873 sln = (struct csio_lnode *) cur_ln;
875 /* Traverse children lnodes */
876 list_for_each(cur_cln, &sln->cln_head)
877 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
879 spin_unlock_irq(&hw->lock);
881 /* Delete NPIV lnodes */
882 for (ii = 0; ii < cur_cnt; ii++) {
883 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
885 fc_vport_terminate(ln->fc_vport);
888 /* Delete only npiv lnodes */
893 /* Get all physical lnodes */
894 spin_lock_irq(&hw->lock);
895 /* Traverse sibling lnodes */
896 list_for_each(cur_ln, &hw->sln_head) {
897 sln = (struct csio_lnode *) cur_ln;
898 lnode_list[cur_cnt++] = sln;
900 spin_unlock_irq(&hw->lock);
902 /* Delete physical lnodes */
903 for (ii = 0; ii < cur_cnt; ii++) {
904 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
905 csio_shost_exit(lnode_list[ii]);
913 * csio_lnode_init_post: Set lnode attributes after starting HW.
918 csio_lnode_init_post(struct csio_lnode *ln)
920 struct Scsi_Host *shost = csio_ln_to_shost(ln);
922 csio_fchost_attr_init(ln);
924 scsi_scan_host(shost);
928 * csio_probe_one - Instantiate this function.
932 * This is the .probe() callback of the driver. This function:
933 * - Initializes the PCI function by enabling MMIO, setting bus
934 * mastership and setting DMA mask.
935 * - Allocates HW structure, DMA, memory resources, maps BARS to
936 * host memory and initializes HW module.
937 * - Allocates lnode structure via scsi_host_alloc, initializes
938 * shost, initialized lnode module and registers with SCSI ML
940 * - Enables interrupts, and starts the chip by kicking off the
942 * - Once hardware is ready, initiated scan of the host via
945 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
951 struct csio_lnode *ln;
953 /* probe only T5 and T6 cards */
954 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) &&
955 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK)))
958 rv = csio_pci_init(pdev, &bars);
962 hw = csio_hw_alloc(pdev);
968 if (!pcie_relaxed_ordering_enabled(pdev))
969 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING;
971 pci_set_drvdata(pdev, hw);
973 rv = csio_hw_start(hw);
977 "Failed to start FW, continuing in debug mode.\n");
983 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
984 FW_HDR_FW_VER_MAJOR_G(hw->fwrev),
985 FW_HDR_FW_VER_MINOR_G(hw->fwrev),
986 FW_HDR_FW_VER_MICRO_G(hw->fwrev),
987 FW_HDR_FW_VER_BUILD_G(hw->fwrev));
989 for (i = 0; i < hw->num_pports; i++) {
990 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
995 /* Initialize portid */
996 ln->portid = hw->pport[i].portid;
998 spin_lock_irq(&hw->lock);
999 if (csio_lnode_start(ln) != 0)
1001 spin_unlock_irq(&hw->lock);
1006 csio_lnode_init_post(ln);
1010 goto err_lnode_exit;
1015 csio_lnodes_block_request(hw);
1016 spin_lock_irq(&hw->lock);
1018 spin_unlock_irq(&hw->lock);
1019 csio_lnodes_unblock_request(hw);
1020 csio_lnodes_exit(hw, 0);
1023 csio_pci_exit(pdev, &bars);
1025 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1030 * csio_remove_one - Remove one instance of the driver at this PCI function.
1033 * Used during hotplug operation.
1035 static void csio_remove_one(struct pci_dev *pdev)
1037 struct csio_hw *hw = pci_get_drvdata(pdev);
1038 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1040 csio_lnodes_block_request(hw);
1041 spin_lock_irq(&hw->lock);
1043 /* Stops lnode, Rnode s/m
1045 * All sessions with remote ports are unregistered.
1048 spin_unlock_irq(&hw->lock);
1049 csio_lnodes_unblock_request(hw);
1051 csio_lnodes_exit(hw, 0);
1053 csio_pci_exit(pdev, &bars);
1057 * csio_pci_error_detected - PCI error was detected
1061 static pci_ers_result_t
1062 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1064 struct csio_hw *hw = pci_get_drvdata(pdev);
1066 csio_lnodes_block_request(hw);
1067 spin_lock_irq(&hw->lock);
1069 /* Post PCI error detected evt to HW s/m
1070 * HW s/m handles this evt by quiescing IOs, unregisters rports
1071 * and finally takes the device to offline.
1073 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1074 spin_unlock_irq(&hw->lock);
1075 csio_lnodes_unblock_request(hw);
1076 csio_lnodes_exit(hw, 0);
1077 csio_intr_disable(hw, true);
1078 pci_disable_device(pdev);
1079 return state == pci_channel_io_perm_failure ?
1080 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1084 * csio_pci_slot_reset - PCI slot has been reset.
1088 static pci_ers_result_t
1089 csio_pci_slot_reset(struct pci_dev *pdev)
1091 struct csio_hw *hw = pci_get_drvdata(pdev);
1094 if (pci_enable_device(pdev)) {
1095 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1096 return PCI_ERS_RESULT_DISCONNECT;
1099 pci_set_master(pdev);
1100 pci_restore_state(pdev);
1101 pci_save_state(pdev);
1103 /* Bring HW s/m to ready state.
1104 * but don't resume IOs.
1106 spin_lock_irq(&hw->lock);
1107 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
1108 ready = csio_is_hw_ready(hw);
1109 spin_unlock_irq(&hw->lock);
1112 return PCI_ERS_RESULT_RECOVERED;
1114 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
1115 return PCI_ERS_RESULT_DISCONNECT;
1120 * csio_pci_resume - Resume normal operations
1125 csio_pci_resume(struct pci_dev *pdev)
1127 struct csio_hw *hw = pci_get_drvdata(pdev);
1128 struct csio_lnode *ln;
1132 /* Bring the LINK UP and Resume IO */
1134 for (i = 0; i < hw->num_pports; i++) {
1135 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
1140 /* Initialize portid */
1141 ln->portid = hw->pport[i].portid;
1143 spin_lock_irq(&hw->lock);
1144 if (csio_lnode_start(ln) != 0)
1146 spin_unlock_irq(&hw->lock);
1151 csio_lnode_init_post(ln);
1155 goto err_resume_exit;
1160 csio_lnodes_block_request(hw);
1161 spin_lock_irq(&hw->lock);
1163 spin_unlock_irq(&hw->lock);
1164 csio_lnodes_unblock_request(hw);
1165 csio_lnodes_exit(hw, 0);
1167 dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
1170 static struct pci_error_handlers csio_err_handler = {
1171 .error_detected = csio_pci_error_detected,
1172 .slot_reset = csio_pci_slot_reset,
1173 .resume = csio_pci_resume,
1177 * Macros needed to support the PCI Device ID Table ...
1179 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
1180 static const struct pci_device_id csio_pci_tbl[] = {
1181 /* Define for FCoE uses PF6 */
1182 #define CH_PCI_DEVICE_ID_FUNCTION 0x6
1184 #define CH_PCI_ID_TABLE_ENTRY(devid) \
1185 { PCI_VDEVICE(CHELSIO, (devid)), 0 }
1187 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
1189 #include "t4_pci_id_tbl.h"
1191 static struct pci_driver csio_pci_driver = {
1192 .name = KBUILD_MODNAME,
1194 .owner = THIS_MODULE,
1196 .id_table = csio_pci_tbl,
1197 .probe = csio_probe_one,
1198 .remove = csio_remove_one,
1199 .err_handler = &csio_err_handler,
1203 * csio_init - Chelsio storage driver initialization function.
1211 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
1215 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
1216 if (!csio_fcoe_transport)
1219 csio_fcoe_transport_vport =
1220 fc_attach_transport(&csio_fc_transport_vport_funcs);
1221 if (!csio_fcoe_transport_vport)
1224 rv = pci_register_driver(&csio_pci_driver);
1231 fc_release_transport(csio_fcoe_transport_vport);
1233 fc_release_transport(csio_fcoe_transport);
1240 * csio_exit - Chelsio storage driver uninitialization .
1242 * Function that gets called in the unload path.
1247 pci_unregister_driver(&csio_pci_driver);
1249 fc_release_transport(csio_fcoe_transport_vport);
1250 fc_release_transport(csio_fcoe_transport);
1253 module_init(csio_init);
1254 module_exit(csio_exit);
1255 MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1256 MODULE_DESCRIPTION(CSIO_DRV_DESC);
1257 MODULE_LICENSE("Dual BSD/GPL");
1258 MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1259 MODULE_VERSION(CSIO_DRV_VERSION);
1260 MODULE_FIRMWARE(FW_FNAME_T5);
1261 MODULE_FIRMWARE(FW_FNAME_T6);