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);
1259 MODULE_SOFTDEP("pre: cxgb4");