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_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev,
489 CSIO_SCSI_RSP_LEN, 8, 0);
490 if (!hw->scsi_pci_pool)
491 goto err_free_rn_pool;
496 mempool_destroy(hw->rnode_mempool);
497 hw->rnode_mempool = NULL;
499 mempool_destroy(hw->mb_mempool);
500 hw->mb_mempool = NULL;
506 csio_resource_free(struct csio_hw *hw)
508 pci_pool_destroy(hw->scsi_pci_pool);
509 hw->scsi_pci_pool = NULL;
510 mempool_destroy(hw->rnode_mempool);
511 hw->rnode_mempool = NULL;
512 mempool_destroy(hw->mb_mempool);
513 hw->mb_mempool = NULL;
517 * csio_hw_alloc - Allocate and initialize the HW module.
520 * Allocates HW structure, DMA, memory resources, maps BARS to
521 * host memory and initializes HW module.
523 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
527 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
532 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
534 /* memory pool/DMA pool allocation */
535 if (csio_resource_alloc(hw))
538 /* Get the start address of registers from BAR 0 */
539 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0),
540 pci_resource_len(pdev, 0));
542 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
544 goto err_resource_free;
547 csio_hw_init_workers(hw);
549 if (csio_hw_init(hw))
554 csio_dbg(hw, "hw:%p\n", hw);
559 csio_hw_exit_workers(hw);
560 iounmap(hw->regstart);
562 csio_resource_free(hw);
570 * csio_hw_free - Uninitialize and free the HW module.
573 * Disable interrupts, uninit the HW module, free resources, free hw.
576 csio_hw_free(struct csio_hw *hw)
578 csio_intr_disable(hw, true);
579 csio_hw_exit_workers(hw);
581 iounmap(hw->regstart);
582 csio_dfs_destroy(hw);
583 csio_resource_free(hw);
588 * csio_shost_init - Create and initialize the lnode module.
589 * @hw: The HW module.
590 * @dev: The device associated with this invocation.
591 * @probe: Called from probe context or not?
592 * @os_pln: Parent lnode if any.
594 * Allocates lnode structure via scsi_host_alloc, initializes
595 * shost, initializes lnode module and registers with SCSI ML
596 * via scsi_host_add. This function is shared between physical and
597 * virtual node ports.
600 csio_shost_init(struct csio_hw *hw, struct device *dev,
601 bool probe, struct csio_lnode *pln)
603 struct Scsi_Host *shost = NULL;
604 struct csio_lnode *ln;
606 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
607 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
610 * hw->pdev is the physical port's PCI dev structure,
611 * which will be different from the NPIV dev structure.
613 if (dev == &hw->pdev->dev)
614 shost = scsi_host_alloc(
615 &csio_fcoe_shost_template,
616 sizeof(struct csio_lnode));
618 shost = scsi_host_alloc(
619 &csio_fcoe_shost_vport_template,
620 sizeof(struct csio_lnode));
625 ln = shost_priv(shost);
626 memset(ln, 0, sizeof(struct csio_lnode));
628 /* Link common lnode to this lnode */
629 ln->dev_num = (shost->host_no << 16);
631 shost->can_queue = CSIO_MAX_QUEUE;
633 shost->unique_id = shost->host_no;
634 shost->max_cmd_len = 16; /* Max CDB length supported */
635 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
636 hw->fres_info.max_ssns);
637 shost->max_lun = CSIO_MAX_LUN;
638 if (dev == &hw->pdev->dev)
639 shost->transportt = csio_fcoe_transport;
641 shost->transportt = csio_fcoe_transport_vport;
647 /* Other initialization here: Common, Transport specific */
648 if (csio_lnode_init(ln, hw, pln))
651 if (scsi_add_host(shost, dev))
659 scsi_host_put(shost);
665 * csio_shost_exit - De-instantiate the shost.
666 * @ln: The lnode module corresponding to the shost.
670 csio_shost_exit(struct csio_lnode *ln)
672 struct Scsi_Host *shost = csio_ln_to_shost(ln);
673 struct csio_hw *hw = csio_lnode_to_hw(ln);
675 /* Inform transport */
676 fc_remove_host(shost);
679 scsi_remove_host(shost);
681 /* Flush all the events, so that any rnode removal events
682 * already queued are all handled, before we remove the lnode.
684 spin_lock_irq(&hw->lock);
686 spin_unlock_irq(&hw->lock);
689 scsi_host_put(shost);
693 csio_lnode_alloc(struct csio_hw *hw)
695 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
699 csio_lnodes_block_request(struct csio_hw *hw)
701 struct Scsi_Host *shost;
702 struct csio_lnode *sln;
703 struct csio_lnode *ln;
704 struct list_head *cur_ln, *cur_cln;
705 struct csio_lnode **lnode_list;
708 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
711 csio_err(hw, "Failed to allocate lnodes_list");
715 spin_lock_irq(&hw->lock);
716 /* Traverse sibling lnodes */
717 list_for_each(cur_ln, &hw->sln_head) {
718 sln = (struct csio_lnode *) cur_ln;
719 lnode_list[cur_cnt++] = sln;
721 /* Traverse children lnodes */
722 list_for_each(cur_cln, &sln->cln_head)
723 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
725 spin_unlock_irq(&hw->lock);
727 for (ii = 0; ii < cur_cnt; ii++) {
728 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
730 shost = csio_ln_to_shost(ln);
731 scsi_block_requests(shost);
738 csio_lnodes_unblock_request(struct csio_hw *hw)
740 struct csio_lnode *ln;
741 struct Scsi_Host *shost;
742 struct csio_lnode *sln;
743 struct list_head *cur_ln, *cur_cln;
744 struct csio_lnode **lnode_list;
747 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
750 csio_err(hw, "Failed to allocate lnodes_list");
754 spin_lock_irq(&hw->lock);
755 /* Traverse sibling lnodes */
756 list_for_each(cur_ln, &hw->sln_head) {
757 sln = (struct csio_lnode *) cur_ln;
758 lnode_list[cur_cnt++] = sln;
760 /* Traverse children lnodes */
761 list_for_each(cur_cln, &sln->cln_head)
762 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
764 spin_unlock_irq(&hw->lock);
766 for (ii = 0; ii < cur_cnt; ii++) {
767 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
769 shost = csio_ln_to_shost(ln);
770 scsi_unblock_requests(shost);
776 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
778 struct csio_lnode *ln;
779 struct Scsi_Host *shost;
780 struct csio_lnode *sln;
781 struct list_head *cur_ln, *cur_cln;
782 struct csio_lnode **lnode_list;
785 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
788 csio_err(hw, "Failed to allocate lnodes_list");
792 spin_lock_irq(&hw->lock);
793 /* Traverse sibling lnodes */
794 list_for_each(cur_ln, &hw->sln_head) {
795 sln = (struct csio_lnode *) cur_ln;
796 if (sln->portid != portid)
799 lnode_list[cur_cnt++] = sln;
801 /* Traverse children lnodes */
802 list_for_each(cur_cln, &sln->cln_head)
803 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
805 spin_unlock_irq(&hw->lock);
807 for (ii = 0; ii < cur_cnt; ii++) {
808 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
810 shost = csio_ln_to_shost(ln);
811 scsi_block_requests(shost);
817 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
819 struct csio_lnode *ln;
820 struct Scsi_Host *shost;
821 struct csio_lnode *sln;
822 struct list_head *cur_ln, *cur_cln;
823 struct csio_lnode **lnode_list;
826 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
829 csio_err(hw, "Failed to allocate lnodes_list");
833 spin_lock_irq(&hw->lock);
834 /* Traverse sibling lnodes */
835 list_for_each(cur_ln, &hw->sln_head) {
836 sln = (struct csio_lnode *) cur_ln;
837 if (sln->portid != portid)
839 lnode_list[cur_cnt++] = sln;
841 /* Traverse children lnodes */
842 list_for_each(cur_cln, &sln->cln_head)
843 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
845 spin_unlock_irq(&hw->lock);
847 for (ii = 0; ii < cur_cnt; ii++) {
848 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
850 shost = csio_ln_to_shost(ln);
851 scsi_unblock_requests(shost);
857 csio_lnodes_exit(struct csio_hw *hw, bool npiv)
859 struct csio_lnode *sln;
860 struct csio_lnode *ln;
861 struct list_head *cur_ln, *cur_cln;
862 struct csio_lnode **lnode_list;
865 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
868 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
872 /* Get all child lnodes(NPIV ports) */
873 spin_lock_irq(&hw->lock);
874 list_for_each(cur_ln, &hw->sln_head) {
875 sln = (struct csio_lnode *) cur_ln;
877 /* Traverse children lnodes */
878 list_for_each(cur_cln, &sln->cln_head)
879 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
881 spin_unlock_irq(&hw->lock);
883 /* Delete NPIV lnodes */
884 for (ii = 0; ii < cur_cnt; ii++) {
885 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
887 fc_vport_terminate(ln->fc_vport);
890 /* Delete only npiv lnodes */
895 /* Get all physical lnodes */
896 spin_lock_irq(&hw->lock);
897 /* Traverse sibling lnodes */
898 list_for_each(cur_ln, &hw->sln_head) {
899 sln = (struct csio_lnode *) cur_ln;
900 lnode_list[cur_cnt++] = sln;
902 spin_unlock_irq(&hw->lock);
904 /* Delete physical lnodes */
905 for (ii = 0; ii < cur_cnt; ii++) {
906 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
907 csio_shost_exit(lnode_list[ii]);
915 * csio_lnode_init_post: Set lnode attributes after starting HW.
920 csio_lnode_init_post(struct csio_lnode *ln)
922 struct Scsi_Host *shost = csio_ln_to_shost(ln);
924 csio_fchost_attr_init(ln);
926 scsi_scan_host(shost);
930 * csio_probe_one - Instantiate this function.
934 * This is the .probe() callback of the driver. This function:
935 * - Initializes the PCI function by enabling MMIO, setting bus
936 * mastership and setting DMA mask.
937 * - Allocates HW structure, DMA, memory resources, maps BARS to
938 * host memory and initializes HW module.
939 * - Allocates lnode structure via scsi_host_alloc, initializes
940 * shost, initialized lnode module and registers with SCSI ML
942 * - Enables interrupts, and starts the chip by kicking off the
944 * - Once hardware is ready, initiated scan of the host via
947 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
953 struct csio_lnode *ln;
955 /* probe only T5 cards */
956 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)))
959 rv = csio_pci_init(pdev, &bars);
963 hw = csio_hw_alloc(pdev);
969 pci_set_drvdata(pdev, hw);
971 if (csio_hw_start(hw) != 0) {
973 "Failed to start FW, continuing in debug mode.\n");
977 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
978 FW_HDR_FW_VER_MAJOR_G(hw->fwrev),
979 FW_HDR_FW_VER_MINOR_G(hw->fwrev),
980 FW_HDR_FW_VER_MICRO_G(hw->fwrev),
981 FW_HDR_FW_VER_BUILD_G(hw->fwrev));
983 for (i = 0; i < hw->num_pports; i++) {
984 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
989 /* Initialize portid */
990 ln->portid = hw->pport[i].portid;
992 spin_lock_irq(&hw->lock);
993 if (csio_lnode_start(ln) != 0)
995 spin_unlock_irq(&hw->lock);
1000 csio_lnode_init_post(ln);
1004 goto err_lnode_exit;
1009 csio_lnodes_block_request(hw);
1010 spin_lock_irq(&hw->lock);
1012 spin_unlock_irq(&hw->lock);
1013 csio_lnodes_unblock_request(hw);
1014 csio_lnodes_exit(hw, 0);
1017 csio_pci_exit(pdev, &bars);
1019 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1024 * csio_remove_one - Remove one instance of the driver at this PCI function.
1027 * Used during hotplug operation.
1029 static void csio_remove_one(struct pci_dev *pdev)
1031 struct csio_hw *hw = pci_get_drvdata(pdev);
1032 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1034 csio_lnodes_block_request(hw);
1035 spin_lock_irq(&hw->lock);
1037 /* Stops lnode, Rnode s/m
1039 * All sessions with remote ports are unregistered.
1042 spin_unlock_irq(&hw->lock);
1043 csio_lnodes_unblock_request(hw);
1045 csio_lnodes_exit(hw, 0);
1047 csio_pci_exit(pdev, &bars);
1051 * csio_pci_error_detected - PCI error was detected
1055 static pci_ers_result_t
1056 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1058 struct csio_hw *hw = pci_get_drvdata(pdev);
1060 csio_lnodes_block_request(hw);
1061 spin_lock_irq(&hw->lock);
1063 /* Post PCI error detected evt to HW s/m
1064 * HW s/m handles this evt by quiescing IOs, unregisters rports
1065 * and finally takes the device to offline.
1067 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1068 spin_unlock_irq(&hw->lock);
1069 csio_lnodes_unblock_request(hw);
1070 csio_lnodes_exit(hw, 0);
1071 csio_intr_disable(hw, true);
1072 pci_disable_device(pdev);
1073 return state == pci_channel_io_perm_failure ?
1074 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1078 * csio_pci_slot_reset - PCI slot has been reset.
1082 static pci_ers_result_t
1083 csio_pci_slot_reset(struct pci_dev *pdev)
1085 struct csio_hw *hw = pci_get_drvdata(pdev);
1088 if (pci_enable_device(pdev)) {
1089 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1090 return PCI_ERS_RESULT_DISCONNECT;
1093 pci_set_master(pdev);
1094 pci_restore_state(pdev);
1095 pci_save_state(pdev);
1096 pci_cleanup_aer_uncorrect_error_status(pdev);
1098 /* Bring HW s/m to ready state.
1099 * but don't resume IOs.
1101 spin_lock_irq(&hw->lock);
1102 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
1103 ready = csio_is_hw_ready(hw);
1104 spin_unlock_irq(&hw->lock);
1107 return PCI_ERS_RESULT_RECOVERED;
1109 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
1110 return PCI_ERS_RESULT_DISCONNECT;
1115 * csio_pci_resume - Resume normal operations
1120 csio_pci_resume(struct pci_dev *pdev)
1122 struct csio_hw *hw = pci_get_drvdata(pdev);
1123 struct csio_lnode *ln;
1127 /* Bring the LINK UP and Resume IO */
1129 for (i = 0; i < hw->num_pports; i++) {
1130 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
1135 /* Initialize portid */
1136 ln->portid = hw->pport[i].portid;
1138 spin_lock_irq(&hw->lock);
1139 if (csio_lnode_start(ln) != 0)
1141 spin_unlock_irq(&hw->lock);
1146 csio_lnode_init_post(ln);
1150 goto err_resume_exit;
1155 csio_lnodes_block_request(hw);
1156 spin_lock_irq(&hw->lock);
1158 spin_unlock_irq(&hw->lock);
1159 csio_lnodes_unblock_request(hw);
1160 csio_lnodes_exit(hw, 0);
1162 dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
1165 static struct pci_error_handlers csio_err_handler = {
1166 .error_detected = csio_pci_error_detected,
1167 .slot_reset = csio_pci_slot_reset,
1168 .resume = csio_pci_resume,
1172 * Macros needed to support the PCI Device ID Table ...
1174 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
1175 static const struct pci_device_id csio_pci_tbl[] = {
1176 /* Define for FCoE uses PF6 */
1177 #define CH_PCI_DEVICE_ID_FUNCTION 0x6
1179 #define CH_PCI_ID_TABLE_ENTRY(devid) \
1180 { PCI_VDEVICE(CHELSIO, (devid)), 0 }
1182 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
1184 #include "t4_pci_id_tbl.h"
1186 static struct pci_driver csio_pci_driver = {
1187 .name = KBUILD_MODNAME,
1189 .owner = THIS_MODULE,
1191 .id_table = csio_pci_tbl,
1192 .probe = csio_probe_one,
1193 .remove = csio_remove_one,
1194 .err_handler = &csio_err_handler,
1198 * csio_init - Chelsio storage driver initialization function.
1206 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
1210 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
1211 if (!csio_fcoe_transport)
1214 csio_fcoe_transport_vport =
1215 fc_attach_transport(&csio_fc_transport_vport_funcs);
1216 if (!csio_fcoe_transport_vport)
1219 rv = pci_register_driver(&csio_pci_driver);
1226 fc_release_transport(csio_fcoe_transport_vport);
1228 fc_release_transport(csio_fcoe_transport);
1235 * csio_exit - Chelsio storage driver uninitialization .
1237 * Function that gets called in the unload path.
1242 pci_unregister_driver(&csio_pci_driver);
1244 fc_release_transport(csio_fcoe_transport_vport);
1245 fc_release_transport(csio_fcoe_transport);
1248 module_init(csio_init);
1249 module_exit(csio_exit);
1250 MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1251 MODULE_DESCRIPTION(CSIO_DRV_DESC);
1252 MODULE_LICENSE(CSIO_DRV_LICENSE);
1253 MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1254 MODULE_VERSION(CSIO_DRV_VERSION);
1255 MODULE_FIRMWARE(FW_FNAME_T5);