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 (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
214 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
215 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
216 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
218 dev_err(&pdev->dev, "No suitable DMA available.\n");
219 goto err_release_regions;
225 pci_release_selected_regions(pdev, *bars);
227 pci_disable_device(pdev);
234 * csio_pci_exit - PCI unitialization.
236 * @bars: Bars to be released.
240 csio_pci_exit(struct pci_dev *pdev, int *bars)
242 pci_release_selected_regions(pdev, *bars);
243 pci_disable_device(pdev);
247 * csio_hw_init_workers - Initialize the HW module's worker threads.
252 csio_hw_init_workers(struct csio_hw *hw)
254 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
258 csio_hw_exit_workers(struct csio_hw *hw)
260 cancel_work_sync(&hw->evtq_work);
261 flush_scheduled_work();
265 csio_create_queues(struct csio_hw *hw)
268 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
270 struct csio_scsi_cpu_info *info;
272 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
275 if (hw->intr_mode != CSIO_IM_MSIX) {
276 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx,
277 0, hw->pport[0].portid, false, NULL);
279 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
285 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx,
286 csio_get_fwevt_intr_idx(hw),
287 hw->pport[0].portid, true, NULL);
289 csio_err(hw, "FW event IQ config failed!: %d\n", rv);
293 /* Create mgmt queue */
294 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
295 mgmtm->iq_idx, hw->pport[0].portid, NULL);
298 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
302 /* Create SCSI queues */
303 for (i = 0; i < hw->num_pports; i++) {
304 info = &hw->scsi_cpu_info[i];
306 for (j = 0; j < info->max_cpus; j++) {
307 struct csio_scsi_qset *sqset = &hw->sqset[i][j];
309 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
310 sqset->intr_idx, i, false, NULL);
313 "SCSI module IQ config failed [%d][%d]:%d\n",
317 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
318 sqset->iq_idx, i, NULL);
321 "SCSI module EQ config failed [%d][%d]:%d\n",
326 } /* For all ports */
328 hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
331 csio_wr_destroy_queues(hw, true);
336 * csio_config_queues - Configure the DMA queues.
339 * Allocates memory for queues are registers them with FW.
342 csio_config_queues(struct csio_hw *hw)
344 int i, j, idx, k = 0;
346 struct csio_scsi_qset *sqset;
347 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
348 struct csio_scsi_qset *orig;
349 struct csio_scsi_cpu_info *info;
351 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
352 return csio_create_queues(hw);
354 /* Calculate number of SCSI queues for MSIX we would like */
355 hw->num_scsi_msix_cpus = num_online_cpus();
356 hw->num_sqsets = num_online_cpus() * hw->num_pports;
358 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) {
359 hw->num_sqsets = CSIO_MAX_SCSI_QSETS;
360 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU;
363 /* Initialize max_cpus, may get reduced during msix allocations */
364 for (i = 0; i < hw->num_pports; i++)
365 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus;
367 csio_dbg(hw, "nsqsets:%d scpus:%d\n",
368 hw->num_sqsets, hw->num_scsi_msix_cpus);
370 csio_intr_enable(hw);
372 if (hw->intr_mode != CSIO_IM_MSIX) {
374 /* Allocate Forward interrupt iq. */
375 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE,
376 CSIO_INTR_WRSIZE, CSIO_INGRESS,
377 (void *)hw, 0, 0, NULL);
378 if (hw->intr_iq_idx == -1) {
380 "Forward interrupt queue creation failed\n");
385 /* Allocate the FW evt queue */
386 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
388 CSIO_INGRESS, (void *)hw,
389 CSIO_FWEVT_FLBUFS, 0,
390 csio_fwevt_intx_handler);
391 if (hw->fwevt_iq_idx == -1) {
392 csio_err(hw, "FW evt queue creation failed\n");
396 /* Allocate the mgmt queue */
397 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
399 CSIO_EGRESS, (void *)hw, 0, 0, NULL);
400 if (mgmtm->eq_idx == -1) {
401 csio_err(hw, "Failed to alloc egress queue for mgmt module\n");
405 /* Use FW IQ for MGMT req completion */
406 mgmtm->iq_idx = hw->fwevt_iq_idx;
408 /* Allocate SCSI queues */
409 for (i = 0; i < hw->num_pports; i++) {
410 info = &hw->scsi_cpu_info[i];
412 for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
413 sqset = &hw->sqset[i][j];
415 if (j >= info->max_cpus) {
416 k = j % info->max_cpus;
417 orig = &hw->sqset[i][k];
418 sqset->eq_idx = orig->eq_idx;
419 sqset->iq_idx = orig->iq_idx;
423 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
424 CSIO_EGRESS, (void *)hw, 0, 0,
427 csio_err(hw, "EQ creation failed for idx:%d\n",
434 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
435 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
437 csio_scsi_intx_handler);
439 csio_err(hw, "IQ creation failed for idx:%d\n",
445 } /* For all ports */
447 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
449 rv = csio_create_queues(hw);
454 * Now request IRQs for the vectors. In the event of a failure,
455 * cleanup is handled internally by this function.
457 rv = csio_request_irqs(hw);
464 csio_intr_disable(hw, false);
470 csio_resource_alloc(struct csio_hw *hw)
472 struct csio_wrm *wrm = csio_hw_to_wrm(hw);
475 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
476 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
478 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
479 sizeof(struct csio_mb));
483 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
484 sizeof(struct csio_rnode));
485 if (!hw->rnode_mempool)
486 goto err_free_mb_mempool;
488 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool",
489 &hw->pdev->dev, CSIO_SCSI_RSP_LEN,
491 if (!hw->scsi_dma_pool)
492 goto err_free_rn_pool;
497 mempool_destroy(hw->rnode_mempool);
498 hw->rnode_mempool = NULL;
500 mempool_destroy(hw->mb_mempool);
501 hw->mb_mempool = NULL;
507 csio_resource_free(struct csio_hw *hw)
509 dma_pool_destroy(hw->scsi_dma_pool);
510 hw->scsi_dma_pool = NULL;
511 mempool_destroy(hw->rnode_mempool);
512 hw->rnode_mempool = NULL;
513 mempool_destroy(hw->mb_mempool);
514 hw->mb_mempool = NULL;
518 * csio_hw_alloc - Allocate and initialize the HW module.
521 * Allocates HW structure, DMA, memory resources, maps BARS to
522 * host memory and initializes HW module.
524 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
528 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
533 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
535 /* memory pool/DMA pool allocation */
536 if (csio_resource_alloc(hw))
539 /* Get the start address of registers from BAR 0 */
540 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0),
541 pci_resource_len(pdev, 0));
543 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
545 goto err_resource_free;
548 csio_hw_init_workers(hw);
550 if (csio_hw_init(hw))
555 csio_dbg(hw, "hw:%p\n", hw);
560 csio_hw_exit_workers(hw);
561 iounmap(hw->regstart);
563 csio_resource_free(hw);
571 * csio_hw_free - Uninitialize and free the HW module.
574 * Disable interrupts, uninit the HW module, free resources, free hw.
577 csio_hw_free(struct csio_hw *hw)
579 csio_intr_disable(hw, true);
580 csio_hw_exit_workers(hw);
582 iounmap(hw->regstart);
583 csio_dfs_destroy(hw);
584 csio_resource_free(hw);
589 * csio_shost_init - Create and initialize the lnode module.
590 * @hw: The HW module.
591 * @dev: The device associated with this invocation.
592 * @probe: Called from probe context or not?
593 * @os_pln: Parent lnode if any.
595 * Allocates lnode structure via scsi_host_alloc, initializes
596 * shost, initializes lnode module and registers with SCSI ML
597 * via scsi_host_add. This function is shared between physical and
598 * virtual node ports.
601 csio_shost_init(struct csio_hw *hw, struct device *dev,
602 bool probe, struct csio_lnode *pln)
604 struct Scsi_Host *shost = NULL;
605 struct csio_lnode *ln;
607 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
608 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
611 * hw->pdev is the physical port's PCI dev structure,
612 * which will be different from the NPIV dev structure.
614 if (dev == &hw->pdev->dev)
615 shost = scsi_host_alloc(
616 &csio_fcoe_shost_template,
617 sizeof(struct csio_lnode));
619 shost = scsi_host_alloc(
620 &csio_fcoe_shost_vport_template,
621 sizeof(struct csio_lnode));
626 ln = shost_priv(shost);
627 memset(ln, 0, sizeof(struct csio_lnode));
629 /* Link common lnode to this lnode */
630 ln->dev_num = (shost->host_no << 16);
632 shost->can_queue = CSIO_MAX_QUEUE;
634 shost->unique_id = shost->host_no;
635 shost->max_cmd_len = 16; /* Max CDB length supported */
636 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
637 hw->fres_info.max_ssns);
638 shost->max_lun = CSIO_MAX_LUN;
639 if (dev == &hw->pdev->dev)
640 shost->transportt = csio_fcoe_transport;
642 shost->transportt = csio_fcoe_transport_vport;
648 /* Other initialization here: Common, Transport specific */
649 if (csio_lnode_init(ln, hw, pln))
652 if (scsi_add_host(shost, dev))
660 scsi_host_put(shost);
666 * csio_shost_exit - De-instantiate the shost.
667 * @ln: The lnode module corresponding to the shost.
671 csio_shost_exit(struct csio_lnode *ln)
673 struct Scsi_Host *shost = csio_ln_to_shost(ln);
674 struct csio_hw *hw = csio_lnode_to_hw(ln);
676 /* Inform transport */
677 fc_remove_host(shost);
680 scsi_remove_host(shost);
682 /* Flush all the events, so that any rnode removal events
683 * already queued are all handled, before we remove the lnode.
685 spin_lock_irq(&hw->lock);
687 spin_unlock_irq(&hw->lock);
690 scsi_host_put(shost);
694 csio_lnode_alloc(struct csio_hw *hw)
696 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
700 csio_lnodes_block_request(struct csio_hw *hw)
702 struct Scsi_Host *shost;
703 struct csio_lnode *sln;
704 struct csio_lnode *ln;
705 struct list_head *cur_ln, *cur_cln;
706 struct csio_lnode **lnode_list;
709 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
712 csio_err(hw, "Failed to allocate lnodes_list");
716 spin_lock_irq(&hw->lock);
717 /* Traverse sibling lnodes */
718 list_for_each(cur_ln, &hw->sln_head) {
719 sln = (struct csio_lnode *) cur_ln;
720 lnode_list[cur_cnt++] = sln;
722 /* Traverse children lnodes */
723 list_for_each(cur_cln, &sln->cln_head)
724 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
726 spin_unlock_irq(&hw->lock);
728 for (ii = 0; ii < cur_cnt; ii++) {
729 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
731 shost = csio_ln_to_shost(ln);
732 scsi_block_requests(shost);
739 csio_lnodes_unblock_request(struct csio_hw *hw)
741 struct csio_lnode *ln;
742 struct Scsi_Host *shost;
743 struct csio_lnode *sln;
744 struct list_head *cur_ln, *cur_cln;
745 struct csio_lnode **lnode_list;
748 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
751 csio_err(hw, "Failed to allocate lnodes_list");
755 spin_lock_irq(&hw->lock);
756 /* Traverse sibling lnodes */
757 list_for_each(cur_ln, &hw->sln_head) {
758 sln = (struct csio_lnode *) cur_ln;
759 lnode_list[cur_cnt++] = sln;
761 /* Traverse children lnodes */
762 list_for_each(cur_cln, &sln->cln_head)
763 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
765 spin_unlock_irq(&hw->lock);
767 for (ii = 0; ii < cur_cnt; ii++) {
768 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
770 shost = csio_ln_to_shost(ln);
771 scsi_unblock_requests(shost);
777 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
779 struct csio_lnode *ln;
780 struct Scsi_Host *shost;
781 struct csio_lnode *sln;
782 struct list_head *cur_ln, *cur_cln;
783 struct csio_lnode **lnode_list;
786 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
789 csio_err(hw, "Failed to allocate lnodes_list");
793 spin_lock_irq(&hw->lock);
794 /* Traverse sibling lnodes */
795 list_for_each(cur_ln, &hw->sln_head) {
796 sln = (struct csio_lnode *) cur_ln;
797 if (sln->portid != portid)
800 lnode_list[cur_cnt++] = sln;
802 /* Traverse children lnodes */
803 list_for_each(cur_cln, &sln->cln_head)
804 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
806 spin_unlock_irq(&hw->lock);
808 for (ii = 0; ii < cur_cnt; ii++) {
809 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
811 shost = csio_ln_to_shost(ln);
812 scsi_block_requests(shost);
818 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
820 struct csio_lnode *ln;
821 struct Scsi_Host *shost;
822 struct csio_lnode *sln;
823 struct list_head *cur_ln, *cur_cln;
824 struct csio_lnode **lnode_list;
827 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
830 csio_err(hw, "Failed to allocate lnodes_list");
834 spin_lock_irq(&hw->lock);
835 /* Traverse sibling lnodes */
836 list_for_each(cur_ln, &hw->sln_head) {
837 sln = (struct csio_lnode *) cur_ln;
838 if (sln->portid != portid)
840 lnode_list[cur_cnt++] = sln;
842 /* Traverse children lnodes */
843 list_for_each(cur_cln, &sln->cln_head)
844 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
846 spin_unlock_irq(&hw->lock);
848 for (ii = 0; ii < cur_cnt; ii++) {
849 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
851 shost = csio_ln_to_shost(ln);
852 scsi_unblock_requests(shost);
858 csio_lnodes_exit(struct csio_hw *hw, bool npiv)
860 struct csio_lnode *sln;
861 struct csio_lnode *ln;
862 struct list_head *cur_ln, *cur_cln;
863 struct csio_lnode **lnode_list;
866 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
869 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
873 /* Get all child lnodes(NPIV ports) */
874 spin_lock_irq(&hw->lock);
875 list_for_each(cur_ln, &hw->sln_head) {
876 sln = (struct csio_lnode *) cur_ln;
878 /* Traverse children lnodes */
879 list_for_each(cur_cln, &sln->cln_head)
880 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
882 spin_unlock_irq(&hw->lock);
884 /* Delete NPIV lnodes */
885 for (ii = 0; ii < cur_cnt; ii++) {
886 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
888 fc_vport_terminate(ln->fc_vport);
891 /* Delete only npiv lnodes */
896 /* Get all physical lnodes */
897 spin_lock_irq(&hw->lock);
898 /* Traverse sibling lnodes */
899 list_for_each(cur_ln, &hw->sln_head) {
900 sln = (struct csio_lnode *) cur_ln;
901 lnode_list[cur_cnt++] = sln;
903 spin_unlock_irq(&hw->lock);
905 /* Delete physical lnodes */
906 for (ii = 0; ii < cur_cnt; ii++) {
907 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
908 csio_shost_exit(lnode_list[ii]);
916 * csio_lnode_init_post: Set lnode attributes after starting HW.
921 csio_lnode_init_post(struct csio_lnode *ln)
923 struct Scsi_Host *shost = csio_ln_to_shost(ln);
925 csio_fchost_attr_init(ln);
927 scsi_scan_host(shost);
931 * csio_probe_one - Instantiate this function.
935 * This is the .probe() callback of the driver. This function:
936 * - Initializes the PCI function by enabling MMIO, setting bus
937 * mastership and setting DMA mask.
938 * - Allocates HW structure, DMA, memory resources, maps BARS to
939 * host memory and initializes HW module.
940 * - Allocates lnode structure via scsi_host_alloc, initializes
941 * shost, initialized lnode module and registers with SCSI ML
943 * - Enables interrupts, and starts the chip by kicking off the
945 * - Once hardware is ready, initiated scan of the host via
948 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
954 struct csio_lnode *ln;
956 /* probe only T5 and T6 cards */
957 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) &&
958 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK)))
961 rv = csio_pci_init(pdev, &bars);
965 hw = csio_hw_alloc(pdev);
971 if (!pcie_relaxed_ordering_enabled(pdev))
972 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING;
974 pci_set_drvdata(pdev, hw);
976 rv = csio_hw_start(hw);
980 "Failed to start FW, continuing in debug mode.\n");
986 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
987 FW_HDR_FW_VER_MAJOR_G(hw->fwrev),
988 FW_HDR_FW_VER_MINOR_G(hw->fwrev),
989 FW_HDR_FW_VER_MICRO_G(hw->fwrev),
990 FW_HDR_FW_VER_BUILD_G(hw->fwrev));
992 for (i = 0; i < hw->num_pports; i++) {
993 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
998 /* Initialize portid */
999 ln->portid = hw->pport[i].portid;
1001 spin_lock_irq(&hw->lock);
1002 if (csio_lnode_start(ln) != 0)
1004 spin_unlock_irq(&hw->lock);
1009 csio_lnode_init_post(ln);
1013 goto err_lnode_exit;
1018 csio_lnodes_block_request(hw);
1019 spin_lock_irq(&hw->lock);
1021 spin_unlock_irq(&hw->lock);
1022 csio_lnodes_unblock_request(hw);
1023 csio_lnodes_exit(hw, 0);
1026 csio_pci_exit(pdev, &bars);
1028 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1033 * csio_remove_one - Remove one instance of the driver at this PCI function.
1036 * Used during hotplug operation.
1038 static void csio_remove_one(struct pci_dev *pdev)
1040 struct csio_hw *hw = pci_get_drvdata(pdev);
1041 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1043 csio_lnodes_block_request(hw);
1044 spin_lock_irq(&hw->lock);
1046 /* Stops lnode, Rnode s/m
1048 * All sessions with remote ports are unregistered.
1051 spin_unlock_irq(&hw->lock);
1052 csio_lnodes_unblock_request(hw);
1054 csio_lnodes_exit(hw, 0);
1056 csio_pci_exit(pdev, &bars);
1060 * csio_pci_error_detected - PCI error was detected
1064 static pci_ers_result_t
1065 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1067 struct csio_hw *hw = pci_get_drvdata(pdev);
1069 csio_lnodes_block_request(hw);
1070 spin_lock_irq(&hw->lock);
1072 /* Post PCI error detected evt to HW s/m
1073 * HW s/m handles this evt by quiescing IOs, unregisters rports
1074 * and finally takes the device to offline.
1076 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1077 spin_unlock_irq(&hw->lock);
1078 csio_lnodes_unblock_request(hw);
1079 csio_lnodes_exit(hw, 0);
1080 csio_intr_disable(hw, true);
1081 pci_disable_device(pdev);
1082 return state == pci_channel_io_perm_failure ?
1083 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1087 * csio_pci_slot_reset - PCI slot has been reset.
1091 static pci_ers_result_t
1092 csio_pci_slot_reset(struct pci_dev *pdev)
1094 struct csio_hw *hw = pci_get_drvdata(pdev);
1097 if (pci_enable_device(pdev)) {
1098 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1099 return PCI_ERS_RESULT_DISCONNECT;
1102 pci_set_master(pdev);
1103 pci_restore_state(pdev);
1104 pci_save_state(pdev);
1105 pci_cleanup_aer_uncorrect_error_status(pdev);
1107 /* Bring HW s/m to ready state.
1108 * but don't resume IOs.
1110 spin_lock_irq(&hw->lock);
1111 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
1112 ready = csio_is_hw_ready(hw);
1113 spin_unlock_irq(&hw->lock);
1116 return PCI_ERS_RESULT_RECOVERED;
1118 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
1119 return PCI_ERS_RESULT_DISCONNECT;
1124 * csio_pci_resume - Resume normal operations
1129 csio_pci_resume(struct pci_dev *pdev)
1131 struct csio_hw *hw = pci_get_drvdata(pdev);
1132 struct csio_lnode *ln;
1136 /* Bring the LINK UP and Resume IO */
1138 for (i = 0; i < hw->num_pports; i++) {
1139 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
1144 /* Initialize portid */
1145 ln->portid = hw->pport[i].portid;
1147 spin_lock_irq(&hw->lock);
1148 if (csio_lnode_start(ln) != 0)
1150 spin_unlock_irq(&hw->lock);
1155 csio_lnode_init_post(ln);
1159 goto err_resume_exit;
1164 csio_lnodes_block_request(hw);
1165 spin_lock_irq(&hw->lock);
1167 spin_unlock_irq(&hw->lock);
1168 csio_lnodes_unblock_request(hw);
1169 csio_lnodes_exit(hw, 0);
1171 dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
1174 static struct pci_error_handlers csio_err_handler = {
1175 .error_detected = csio_pci_error_detected,
1176 .slot_reset = csio_pci_slot_reset,
1177 .resume = csio_pci_resume,
1181 * Macros needed to support the PCI Device ID Table ...
1183 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
1184 static const struct pci_device_id csio_pci_tbl[] = {
1185 /* Define for FCoE uses PF6 */
1186 #define CH_PCI_DEVICE_ID_FUNCTION 0x6
1188 #define CH_PCI_ID_TABLE_ENTRY(devid) \
1189 { PCI_VDEVICE(CHELSIO, (devid)), 0 }
1191 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
1193 #include "t4_pci_id_tbl.h"
1195 static struct pci_driver csio_pci_driver = {
1196 .name = KBUILD_MODNAME,
1198 .owner = THIS_MODULE,
1200 .id_table = csio_pci_tbl,
1201 .probe = csio_probe_one,
1202 .remove = csio_remove_one,
1203 .err_handler = &csio_err_handler,
1207 * csio_init - Chelsio storage driver initialization function.
1215 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
1219 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
1220 if (!csio_fcoe_transport)
1223 csio_fcoe_transport_vport =
1224 fc_attach_transport(&csio_fc_transport_vport_funcs);
1225 if (!csio_fcoe_transport_vport)
1228 rv = pci_register_driver(&csio_pci_driver);
1235 fc_release_transport(csio_fcoe_transport_vport);
1237 fc_release_transport(csio_fcoe_transport);
1244 * csio_exit - Chelsio storage driver uninitialization .
1246 * Function that gets called in the unload path.
1251 pci_unregister_driver(&csio_pci_driver);
1253 fc_release_transport(csio_fcoe_transport_vport);
1254 fc_release_transport(csio_fcoe_transport);
1257 module_init(csio_init);
1258 module_exit(csio_exit);
1259 MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1260 MODULE_DESCRIPTION(CSIO_DRV_DESC);
1261 MODULE_LICENSE("Dual BSD/GPL");
1262 MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1263 MODULE_VERSION(CSIO_DRV_VERSION);
1264 MODULE_FIRMWARE(FW_FNAME_T5);
1265 MODULE_FIRMWARE(FW_FNAME_T6);