2 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
4 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
7 * Copyright (C) 2008, 2009 PMC Sierra Inc
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
26 #include <linux/init.h>
27 #include <linux/types.h>
28 #include <linux/errno.h>
29 #include <linux/kernel.h>
30 #include <linux/ioport.h>
31 #include <linux/delay.h>
32 #include <linux/pci.h>
33 #include <linux/wait.h>
34 #include <linux/spinlock.h>
35 #include <linux/sched.h>
36 #include <linux/interrupt.h>
37 #include <linux/blkdev.h>
38 #include <linux/firmware.h>
39 #include <linux/module.h>
40 #include <linux/moduleparam.h>
41 #include <linux/hdreg.h>
43 #include <linux/slab.h>
45 #include <asm/processor.h>
46 #include <linux/libata.h>
47 #include <linux/mutex.h>
48 #include <scsi/scsi.h>
49 #include <scsi/scsi_host.h>
50 #include <scsi/scsi_device.h>
51 #include <scsi/scsi_tcq.h>
52 #include <scsi/scsi_eh.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsicam.h>
59 * Module configuration parameters
61 static unsigned int pmcraid_debug_log;
62 static unsigned int pmcraid_disable_aen;
63 static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
64 static unsigned int pmcraid_enable_msix;
67 * Data structures to support multiple adapters by the LLD.
68 * pmcraid_adapter_count - count of configured adapters
70 static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
73 * Supporting user-level control interface through IOCTL commands.
74 * pmcraid_major - major number to use
75 * pmcraid_minor - minor number(s) to use
77 static unsigned int pmcraid_major;
78 static struct class *pmcraid_class;
79 DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
84 MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
85 MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(PMCRAID_DRIVER_VERSION);
89 module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
90 MODULE_PARM_DESC(log_level,
91 "Enables firmware error code logging, default :1 high-severity"
92 " errors, 2: all errors including high-severity errors,"
93 " 0: disables logging");
95 module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
96 MODULE_PARM_DESC(debug,
97 "Enable driver verbose message logging. Set 1 to enable."
100 module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
101 MODULE_PARM_DESC(disable_aen,
102 "Disable driver aen notifications to apps. Set 1 to disable."
105 /* chip specific constants for PMC MaxRAID controllers (same for
108 static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
113 .global_intr_mask = 0x00034,
114 .ioa_host_intr = 0x0009C,
115 .ioa_host_intr_clr = 0x000A0,
116 .ioa_host_msix_intr = 0x7FC40,
117 .ioa_host_mask = 0x7FC28,
118 .ioa_host_mask_clr = 0x7FC28,
119 .host_ioa_intr = 0x00020,
120 .host_ioa_intr_clr = 0x00020,
121 .transop_timeout = 300
126 * PCI device ids supported by pmcraid driver
128 static struct pci_device_id pmcraid_pci_table[] = {
129 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
130 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
135 MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
140 * pmcraid_slave_alloc - Prepare for commands to a device
141 * @scsi_dev: scsi device struct
143 * This function is called by mid-layer prior to sending any command to the new
144 * device. Stores resource entry details of the device in scsi_device struct.
145 * Queuecommand uses the resource handle and other details to fill up IOARCB
146 * while sending commands to the device.
149 * 0 on success / -ENXIO if device does not exist
151 static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
153 struct pmcraid_resource_entry *temp, *res = NULL;
154 struct pmcraid_instance *pinstance;
156 unsigned long lock_flags;
160 pinstance = shost_priv(scsi_dev->host);
162 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
164 /* Driver exposes VSET and GSCSI resources only; all other device types
165 * are not exposed. Resource list is synchronized using resource lock
166 * so any traversal or modifications to the list should be done inside
169 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
170 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
172 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
173 if (RES_IS_VSET(temp->cfg_entry)) {
174 if (fw_version <= PMCRAID_FW_VERSION_1)
175 target = temp->cfg_entry.unique_flags1;
177 target = temp->cfg_entry.array_id & 0xFF;
179 if (target > PMCRAID_MAX_VSET_TARGETS)
181 bus = PMCRAID_VSET_BUS_ID;
183 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
184 target = RES_TARGET(temp->cfg_entry.resource_address);
185 bus = PMCRAID_PHYS_BUS_ID;
186 lun = RES_LUN(temp->cfg_entry.resource_address);
191 if (bus == scsi_dev->channel &&
192 target == scsi_dev->id &&
193 lun == scsi_dev->lun) {
200 res->scsi_dev = scsi_dev;
201 scsi_dev->hostdata = res;
202 res->change_detected = 0;
203 atomic_set(&res->read_failures, 0);
204 atomic_set(&res->write_failures, 0);
207 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
212 * pmcraid_slave_configure - Configures a SCSI device
213 * @scsi_dev: scsi device struct
215 * This function is executed by SCSI mid layer just after a device is first
216 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
217 * timeout value (default 30s) will be over-written to a higher value (60s)
218 * and max_sectors value will be over-written to 512. It also sets queue depth
219 * to host->cmd_per_lun value
224 static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
226 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
231 /* LLD exposes VSETs and Enclosure devices only */
232 if (RES_IS_GSCSI(res->cfg_entry) &&
233 scsi_dev->type != TYPE_ENCLOSURE)
236 pmcraid_info("configuring %x:%x:%x:%x\n",
237 scsi_dev->host->unique_id,
242 if (RES_IS_GSCSI(res->cfg_entry)) {
243 scsi_dev->allow_restart = 1;
244 } else if (RES_IS_VSET(res->cfg_entry)) {
245 scsi_dev->allow_restart = 1;
246 blk_queue_rq_timeout(scsi_dev->request_queue,
247 PMCRAID_VSET_IO_TIMEOUT);
248 blk_queue_max_hw_sectors(scsi_dev->request_queue,
249 PMCRAID_VSET_MAX_SECTORS);
252 if (scsi_dev->tagged_supported &&
253 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
254 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
255 scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
256 scsi_dev->host->cmd_per_lun);
258 scsi_adjust_queue_depth(scsi_dev, 0,
259 scsi_dev->host->cmd_per_lun);
266 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
268 * @scsi_dev: scsi device struct
270 * This is called by mid-layer before removing a device. Pointer assignments
271 * done in pmcraid_slave_alloc will be reset to NULL here.
276 static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
278 struct pmcraid_resource_entry *res;
280 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
283 res->scsi_dev = NULL;
285 scsi_dev->hostdata = NULL;
289 * pmcraid_change_queue_depth - Change the device's queue depth
290 * @scsi_dev: scsi device struct
291 * @depth: depth to set
292 * @reason: calling context
297 static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
300 if (reason != SCSI_QDEPTH_DEFAULT)
303 if (depth > PMCRAID_MAX_CMD_PER_LUN)
304 depth = PMCRAID_MAX_CMD_PER_LUN;
306 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
308 return scsi_dev->queue_depth;
312 * pmcraid_change_queue_type - Change the device's queue type
313 * @scsi_dev: scsi device struct
314 * @tag: type of tags to use
317 * actual queue type set
319 static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
321 struct pmcraid_resource_entry *res;
323 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
325 if ((res) && scsi_dev->tagged_supported &&
326 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
327 scsi_set_tag_type(scsi_dev, tag);
330 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
332 scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
341 * pmcraid_init_cmdblk - initializes a command block
343 * @cmd: pointer to struct pmcraid_cmd to be initialized
344 * @index: if >=0 first time initialization; otherwise reinitialization
349 void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
351 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
352 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
355 /* first time initialization (called from probe) */
357 offsetof(struct pmcraid_control_block, ioasa);
360 ioarcb->response_handle = cpu_to_le32(index << 2);
361 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
362 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
363 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
365 /* re-initialization of various lengths, called once command is
368 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
370 ioarcb->request_flags0 = 0;
371 ioarcb->request_flags1 = 0;
372 ioarcb->cmd_timeout = 0;
373 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
374 ioarcb->ioadl_bus_addr = 0;
375 ioarcb->ioadl_length = 0;
376 ioarcb->data_transfer_length = 0;
377 ioarcb->add_cmd_param_length = 0;
378 ioarcb->add_cmd_param_offset = 0;
379 cmd->ioa_cb->ioasa.ioasc = 0;
380 cmd->ioa_cb->ioasa.residual_data_length = 0;
384 cmd->cmd_done = NULL;
385 cmd->scsi_cmd = NULL;
387 cmd->completion_req = 0;
388 cmd->sense_buffer = 0;
389 cmd->sense_buffer_dma = 0;
391 init_timer(&cmd->timer);
395 * pmcraid_reinit_cmdblk - reinitialize a command block
397 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
402 static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
404 pmcraid_init_cmdblk(cmd, -1);
408 * pmcraid_get_free_cmd - get a free cmd block from command block pool
409 * @pinstance: adapter instance structure
412 * returns pointer to cmd block or NULL if no blocks are available
414 static struct pmcraid_cmd *pmcraid_get_free_cmd(
415 struct pmcraid_instance *pinstance
418 struct pmcraid_cmd *cmd = NULL;
419 unsigned long lock_flags;
421 /* free cmd block list is protected by free_pool_lock */
422 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
424 if (!list_empty(&pinstance->free_cmd_pool)) {
425 cmd = list_entry(pinstance->free_cmd_pool.next,
426 struct pmcraid_cmd, free_list);
427 list_del(&cmd->free_list);
429 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
431 /* Initialize the command block before giving it the caller */
433 pmcraid_reinit_cmdblk(cmd);
438 * pmcraid_return_cmd - return a completed command block back into free pool
439 * @cmd: pointer to the command block
444 void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
446 struct pmcraid_instance *pinstance = cmd->drv_inst;
447 unsigned long lock_flags;
449 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
450 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
451 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
455 * pmcraid_read_interrupts - reads IOA interrupts
457 * @pinstance: pointer to adapter instance structure
460 * interrupts read from IOA
462 static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
464 return (pinstance->interrupt_mode) ?
465 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
466 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
470 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
472 * @pinstance: pointer to per adapter instance structure
473 * @intrs: interrupts to disable
478 static void pmcraid_disable_interrupts(
479 struct pmcraid_instance *pinstance,
483 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
484 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
486 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
487 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
488 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
490 if (!pinstance->interrupt_mode) {
492 pinstance->int_regs.ioa_host_interrupt_mask_reg);
493 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
498 * pmcraid_enable_interrupts - Enables specified interrupts
500 * @pinstance: pointer to per adapter instance structure
501 * @intr: interrupts to enable
506 static void pmcraid_enable_interrupts(
507 struct pmcraid_instance *pinstance,
511 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
512 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
514 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
516 if (!pinstance->interrupt_mode) {
518 pinstance->int_regs.ioa_host_interrupt_mask_reg);
519 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
522 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
523 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
524 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
528 * pmcraid_clr_trans_op - clear trans to op interrupt
530 * @pinstance: pointer to per adapter instance structure
535 static void pmcraid_clr_trans_op(
536 struct pmcraid_instance *pinstance
539 unsigned long lock_flags;
541 if (!pinstance->interrupt_mode) {
542 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
543 pinstance->int_regs.ioa_host_interrupt_mask_reg);
544 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
545 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
546 pinstance->int_regs.ioa_host_interrupt_clr_reg);
547 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
550 if (pinstance->reset_cmd != NULL) {
551 del_timer(&pinstance->reset_cmd->timer);
553 pinstance->host->host_lock, lock_flags);
554 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
555 spin_unlock_irqrestore(
556 pinstance->host->host_lock, lock_flags);
561 * pmcraid_reset_type - Determine the required reset type
562 * @pinstance: pointer to adapter instance structure
564 * IOA requires hard reset if any of the following conditions is true.
565 * 1. If HRRQ valid interrupt is not masked
566 * 2. IOA reset alert doorbell is set
567 * 3. If there are any error interrupts
569 static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
575 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
576 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
577 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
579 if ((mask & INTRS_HRRQ_VALID) == 0 ||
580 (alerts & DOORBELL_IOA_RESET_ALERT) ||
581 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
582 pmcraid_info("IOA requires hard reset\n");
583 pinstance->ioa_hard_reset = 1;
586 /* If unit check is active, trigger the dump */
587 if (intrs & INTRS_IOA_UNIT_CHECK)
588 pinstance->ioa_unit_check = 1;
592 * pmcraid_bist_done - completion function for PCI BIST
593 * @cmd: pointer to reset command
598 static void pmcraid_ioa_reset(struct pmcraid_cmd *);
600 static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
602 struct pmcraid_instance *pinstance = cmd->drv_inst;
603 unsigned long lock_flags;
607 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
609 /* If PCI config space can't be accessed wait for another two secs */
610 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
611 cmd->time_left > 0) {
612 pmcraid_info("BIST not complete, waiting another 2 secs\n");
613 cmd->timer.expires = jiffies + cmd->time_left;
615 cmd->timer.data = (unsigned long)cmd;
616 cmd->timer.function =
617 (void (*)(unsigned long))pmcraid_bist_done;
618 add_timer(&cmd->timer);
621 pmcraid_info("BIST is complete, proceeding with reset\n");
622 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
623 pmcraid_ioa_reset(cmd);
624 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
629 * pmcraid_start_bist - starts BIST
630 * @cmd: pointer to reset cmd
634 static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
636 struct pmcraid_instance *pinstance = cmd->drv_inst;
637 u32 doorbells, intrs;
639 /* proceed with bist and wait for 2 seconds */
640 iowrite32(DOORBELL_IOA_START_BIST,
641 pinstance->int_regs.host_ioa_interrupt_reg);
642 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
643 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
644 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
647 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
648 cmd->timer.data = (unsigned long)cmd;
649 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
650 cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
651 add_timer(&cmd->timer);
655 * pmcraid_reset_alert_done - completion routine for reset_alert
656 * @cmd: pointer to command block used in reset sequence
660 static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
662 struct pmcraid_instance *pinstance = cmd->drv_inst;
663 u32 status = ioread32(pinstance->ioa_status);
664 unsigned long lock_flags;
666 /* if the critical operation in progress bit is set or the wait times
667 * out, invoke reset engine to proceed with hard reset. If there is
668 * some more time to wait, restart the timer
670 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
671 cmd->time_left <= 0) {
672 pmcraid_info("critical op is reset proceeding with reset\n");
673 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
674 pmcraid_ioa_reset(cmd);
675 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
677 pmcraid_info("critical op is not yet reset waiting again\n");
678 /* restart timer if some more time is available to wait */
679 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
680 cmd->timer.data = (unsigned long)cmd;
681 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
682 cmd->timer.function =
683 (void (*)(unsigned long))pmcraid_reset_alert_done;
684 add_timer(&cmd->timer);
689 * pmcraid_reset_alert - alerts IOA for a possible reset
690 * @cmd : command block to be used for reset sequence.
693 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
694 * successfully written to IOA. Returns non-zero in case pci_config_space
697 static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
698 static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
700 struct pmcraid_instance *pinstance = cmd->drv_inst;
705 /* If we are able to access IOA PCI config space, alert IOA that we are
706 * going to reset it soon. This enables IOA to preserv persistent error
707 * data if any. In case memory space is not accessible, proceed with
710 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
711 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
713 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
714 * reset IOA doesn't generate any interrupts when CRITICAL
715 * OPERATION bit is reset. A timer is started to wait for this
718 cmd->time_left = PMCRAID_RESET_TIMEOUT;
719 cmd->timer.data = (unsigned long)cmd;
720 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
721 cmd->timer.function =
722 (void (*)(unsigned long))pmcraid_reset_alert_done;
723 add_timer(&cmd->timer);
725 iowrite32(DOORBELL_IOA_RESET_ALERT,
726 pinstance->int_regs.host_ioa_interrupt_reg);
728 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
729 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
731 pmcraid_info("PCI config is not accessible starting BIST\n");
732 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
733 pmcraid_start_bist(cmd);
738 * pmcraid_timeout_handler - Timeout handler for internally generated ops
740 * @cmd : pointer to command structure, that got timedout
742 * This function blocks host requests and initiates an adapter reset.
747 static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
749 struct pmcraid_instance *pinstance = cmd->drv_inst;
750 unsigned long lock_flags;
752 dev_info(&pinstance->pdev->dev,
753 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
754 cmd->ioa_cb->ioarcb.cdb[0]);
756 /* Command timeouts result in hard reset sequence. The command that got
757 * timed out may be the one used as part of reset sequence. In this
758 * case restart reset sequence using the same command block even if
759 * reset is in progress. Otherwise fail this command and get a free
760 * command block to restart the reset sequence.
762 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
763 if (!pinstance->ioa_reset_in_progress) {
764 pinstance->ioa_reset_attempts = 0;
765 cmd = pmcraid_get_free_cmd(pinstance);
767 /* If we are out of command blocks, just return here itself.
768 * Some other command's timeout handler can do the reset job
771 spin_unlock_irqrestore(pinstance->host->host_lock,
773 pmcraid_err("no free cmnd block for timeout handler\n");
777 pinstance->reset_cmd = cmd;
778 pinstance->ioa_reset_in_progress = 1;
780 pmcraid_info("reset is already in progress\n");
782 if (pinstance->reset_cmd != cmd) {
783 /* This command should have been given to IOA, this
784 * command will be completed by fail_outstanding_cmds
787 pmcraid_err("cmd is pending but reset in progress\n");
790 /* If this command was being used as part of the reset
791 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
792 * causes fail_outstanding_commands not to return the command
793 * block back to free pool
795 if (cmd == pinstance->reset_cmd)
796 cmd->cmd_done = pmcraid_ioa_reset;
799 /* Notify apps of important IOA bringup/bringdown sequences */
800 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
801 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
802 pmcraid_notify_ioastate(pinstance,
803 PMC_DEVICE_EVENT_RESET_START);
805 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
806 scsi_block_requests(pinstance->host);
807 pmcraid_reset_alert(cmd);
808 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
812 * pmcraid_internal_done - completion routine for internally generated cmds
814 * @cmd: command that got response from IOA
819 static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
821 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
822 cmd->ioa_cb->ioarcb.cdb[0],
823 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
825 /* Some of the internal commands are sent with callers blocking for the
826 * response. Same will be indicated as part of cmd->completion_req
827 * field. Response path needs to wake up any waiters waiting for cmd
828 * completion if this flag is set.
830 if (cmd->completion_req) {
831 cmd->completion_req = 0;
832 complete(&cmd->wait_for_completion);
835 /* most of the internal commands are completed by caller itself, so
836 * no need to return the command block back to free pool until we are
837 * required to do so (e.g once done with initialization).
841 pmcraid_return_cmd(cmd);
846 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
848 * @cmd: command that got response from IOA
850 * This routine is called after driver re-reads configuration table due to a
851 * lost CCN. It returns the command block back to free pool and schedules
852 * worker thread to add/delete devices into the system.
857 static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
859 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
860 cmd->ioa_cb->ioarcb.cdb[0],
861 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
865 pmcraid_return_cmd(cmd);
867 pmcraid_info("scheduling worker for config table reinitialization\n");
868 schedule_work(&cmd->drv_inst->worker_q);
872 * pmcraid_erp_done - Process completion of SCSI error response from device
873 * @cmd: pmcraid_command
875 * This function copies the sense buffer into the scsi_cmd struct and completes
876 * scsi_cmd by calling scsi_done function.
881 static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
883 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
884 struct pmcraid_instance *pinstance = cmd->drv_inst;
885 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
887 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
888 scsi_cmd->result |= (DID_ERROR << 16);
889 scmd_printk(KERN_INFO, scsi_cmd,
890 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
891 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
894 /* if we had allocated sense buffers for request sense, copy the sense
895 * release the buffers
897 if (cmd->sense_buffer != NULL) {
898 memcpy(scsi_cmd->sense_buffer,
900 SCSI_SENSE_BUFFERSIZE);
901 pci_free_consistent(pinstance->pdev,
902 SCSI_SENSE_BUFFERSIZE,
903 cmd->sense_buffer, cmd->sense_buffer_dma);
904 cmd->sense_buffer = NULL;
905 cmd->sense_buffer_dma = 0;
908 scsi_dma_unmap(scsi_cmd);
909 pmcraid_return_cmd(cmd);
910 scsi_cmd->scsi_done(scsi_cmd);
914 * pmcraid_fire_command - sends an IOA command to adapter
916 * This function adds the given block into pending command list
917 * and returns without waiting
919 * @cmd : command to be sent to the device
924 static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
926 struct pmcraid_instance *pinstance = cmd->drv_inst;
927 unsigned long lock_flags;
929 /* Add this command block to pending cmd pool. We do this prior to
930 * writting IOARCB to ioarrin because IOA might complete the command
931 * by the time we are about to add it to the list. Response handler
932 * (isr/tasklet) looks for cmd block in the pending pending list.
934 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
935 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
936 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
937 atomic_inc(&pinstance->outstanding_cmds);
939 /* driver writes lower 32-bit value of IOARCB address only */
941 iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
946 * pmcraid_send_cmd - fires a command to IOA
948 * This function also sets up timeout function, and command completion
951 * @cmd: pointer to the command block to be fired to IOA
952 * @cmd_done: command completion function, called once IOA responds
953 * @timeout: timeout to wait for this command completion
954 * @timeout_func: timeout handler
959 static void pmcraid_send_cmd(
960 struct pmcraid_cmd *cmd,
961 void (*cmd_done) (struct pmcraid_cmd *),
962 unsigned long timeout,
963 void (*timeout_func) (struct pmcraid_cmd *)
966 /* initialize done function */
967 cmd->cmd_done = cmd_done;
970 /* setup timeout handler */
971 cmd->timer.data = (unsigned long)cmd;
972 cmd->timer.expires = jiffies + timeout;
973 cmd->timer.function = (void (*)(unsigned long))timeout_func;
974 add_timer(&cmd->timer);
977 /* fire the command to IOA */
978 _pmcraid_fire_command(cmd);
982 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
983 * @cmd: pointer to the command block used for sending IOA shutdown command
988 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
990 struct pmcraid_instance *pinstance = cmd->drv_inst;
991 unsigned long lock_flags;
993 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
994 pmcraid_ioa_reset(cmd);
995 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
999 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1001 * @cmd: pointer to the command block used as part of reset sequence
1006 static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
1008 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1009 cmd->ioa_cb->ioarcb.cdb[0],
1010 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1012 /* Note that commands sent during reset require next command to be sent
1013 * to IOA. Hence reinit the done function as well as timeout function
1015 pmcraid_reinit_cmdblk(cmd);
1016 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
1017 cmd->ioa_cb->ioarcb.resource_handle =
1018 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1019 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
1020 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
1022 /* fire shutdown command to hardware. */
1023 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1024 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
1026 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
1028 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
1029 PMCRAID_SHUTDOWN_TIMEOUT,
1030 pmcraid_timeout_handler);
1034 * pmcraid_get_fwversion_done - completion function for get_fwversion
1036 * @cmd: pointer to command block used to send INQUIRY command
1041 static void pmcraid_querycfg(struct pmcraid_cmd *);
1043 static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
1045 struct pmcraid_instance *pinstance = cmd->drv_inst;
1046 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1047 unsigned long lock_flags;
1049 /* configuration table entry size depends on firmware version. If fw
1050 * version is not known, it is not possible to interpret IOA config
1054 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
1055 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1056 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1057 pmcraid_reset_alert(cmd);
1058 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1060 pmcraid_querycfg(cmd);
1065 * pmcraid_get_fwversion - reads firmware version information
1067 * @cmd: pointer to command block used to send INQUIRY command
1072 static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1074 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1075 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
1076 struct pmcraid_instance *pinstance = cmd->drv_inst;
1077 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1079 pmcraid_reinit_cmdblk(cmd);
1080 ioarcb->request_type = REQ_TYPE_SCSI;
1081 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1082 ioarcb->cdb[0] = INQUIRY;
1084 ioarcb->cdb[2] = 0xD0;
1085 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1086 ioarcb->cdb[4] = data_size & 0xFF;
1088 /* Since entire inquiry data it can be part of IOARCB itself
1090 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1091 offsetof(struct pmcraid_ioarcb,
1092 add_data.u.ioadl[0]));
1093 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1094 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
1096 ioarcb->request_flags0 |= NO_LINK_DESCS;
1097 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1098 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1099 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1100 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1101 ioadl->data_len = cpu_to_le32(data_size);
1103 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1104 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1108 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1109 * @cmd: pointer to command block to be used for identify hrrq
1114 static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1116 struct pmcraid_instance *pinstance = cmd->drv_inst;
1117 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1118 int index = cmd->hrrq_index;
1119 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1120 u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
1121 void (*done_function)(struct pmcraid_cmd *);
1123 pmcraid_reinit_cmdblk(cmd);
1124 cmd->hrrq_index = index + 1;
1126 if (cmd->hrrq_index < pinstance->num_hrrq) {
1127 done_function = pmcraid_identify_hrrq;
1129 cmd->hrrq_index = 0;
1130 done_function = pmcraid_get_fwversion;
1133 /* Initialize ioarcb */
1134 ioarcb->request_type = REQ_TYPE_IOACMD;
1135 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1137 /* initialize the hrrq number where IOA will respond to this command */
1138 ioarcb->hrrq_id = index;
1139 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1140 ioarcb->cdb[1] = index;
1142 /* IOA expects 64-bit pci address to be written in B.E format
1143 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1145 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1146 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
1148 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1149 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1151 /* Subsequent commands require HRRQ identification to be successful.
1152 * Note that this gets called even during reset from SCSI mid-layer
1155 pmcraid_send_cmd(cmd, done_function,
1156 PMCRAID_INTERNAL_TIMEOUT,
1157 pmcraid_timeout_handler);
1160 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1161 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1164 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1166 * @cmd: initialized command block pointer
1171 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1173 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1174 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1176 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1178 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1182 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1184 * @pinstance: pointer to adapter instance structure
1188 * pointer to initialized pmcraid_cmd structure or NULL
1190 static struct pmcraid_cmd *pmcraid_init_hcam
1192 struct pmcraid_instance *pinstance,
1196 struct pmcraid_cmd *cmd;
1197 struct pmcraid_ioarcb *ioarcb;
1198 struct pmcraid_ioadl_desc *ioadl;
1199 struct pmcraid_hostrcb *hcam;
1200 void (*cmd_done) (struct pmcraid_cmd *);
1204 cmd = pmcraid_get_free_cmd(pinstance);
1207 pmcraid_err("no free command blocks for hcam\n");
1211 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
1212 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
1213 cmd_done = pmcraid_process_ccn;
1214 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1215 hcam = &pinstance->ccn;
1217 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1218 cmd_done = pmcraid_process_ldn;
1219 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1220 hcam = &pinstance->ldn;
1223 /* initialize command pointer used for HCAM registration */
1226 ioarcb = &cmd->ioa_cb->ioarcb;
1227 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1228 offsetof(struct pmcraid_ioarcb,
1229 add_data.u.ioadl[0]));
1230 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1231 ioadl = ioarcb->add_data.u.ioadl;
1233 /* Initialize ioarcb */
1234 ioarcb->request_type = REQ_TYPE_HCAM;
1235 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1236 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1237 ioarcb->cdb[1] = type;
1238 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1239 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1241 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1243 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
1244 ioadl[0].data_len = cpu_to_le32(rcb_size);
1245 ioadl[0].address = cpu_to_le32(dma);
1247 cmd->cmd_done = cmd_done;
1252 * pmcraid_send_hcam - Send an HCAM to IOA
1253 * @pinstance: ioa config struct
1256 * This function will send a Host Controlled Async command to IOA.
1261 static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1263 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1264 pmcraid_send_hcam_cmd(cmd);
1269 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1271 * @cmd: pointer to cmd that is used as cancelling command
1272 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1274 static void pmcraid_prepare_cancel_cmd(
1275 struct pmcraid_cmd *cmd,
1276 struct pmcraid_cmd *cmd_to_cancel
1279 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1280 __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
1282 /* Get the resource handle to where the command to be aborted has been
1285 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1286 ioarcb->request_type = REQ_TYPE_IOACMD;
1287 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1288 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1290 /* IOARCB address of the command to be cancelled is given in
1291 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1292 * IOARCB address are not masked.
1294 ioarcb_addr = cpu_to_be64(ioarcb_addr);
1295 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1299 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1301 * @cmd: command to be used as cancelling command
1303 * @cmd_done: op done function for the cancelling command
1305 static void pmcraid_cancel_hcam(
1306 struct pmcraid_cmd *cmd,
1308 void (*cmd_done) (struct pmcraid_cmd *)
1311 struct pmcraid_instance *pinstance;
1312 struct pmcraid_hostrcb *hcam;
1314 pinstance = cmd->drv_inst;
1315 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1316 &pinstance->ldn : &pinstance->ccn;
1318 /* prepare for cancelling previous hcam command. If the HCAM is
1319 * currently not pending with IOA, we would have hcam->cmd as non-null
1321 if (hcam->cmd == NULL)
1324 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1326 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1327 * schedule queuecommand while we are doing this
1329 pmcraid_send_cmd(cmd, cmd_done,
1330 PMCRAID_INTERNAL_TIMEOUT,
1331 pmcraid_timeout_handler);
1335 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1337 * @cmd: command block to be used for cancelling the HCAM
1339 static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1341 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1342 cmd->ioa_cb->ioarcb.cdb[0],
1343 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1345 pmcraid_reinit_cmdblk(cmd);
1347 pmcraid_cancel_hcam(cmd,
1348 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1349 pmcraid_ioa_shutdown);
1353 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1355 * @cmd: command block to be used for cancelling the HCAM
1357 static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1359 pmcraid_cancel_hcam(cmd,
1360 PMCRAID_HCAM_CODE_LOG_DATA,
1361 pmcraid_cancel_ccn);
1365 * pmcraid_expose_resource - check if the resource can be exposed to OS
1367 * @fw_version: firmware version code
1368 * @cfgte: pointer to configuration table entry of the resource
1371 * true if resource can be added to midlayer, false(0) otherwise
1373 static int pmcraid_expose_resource(u16 fw_version,
1374 struct pmcraid_config_table_entry *cfgte)
1378 if (cfgte->resource_type == RES_TYPE_VSET) {
1379 if (fw_version <= PMCRAID_FW_VERSION_1)
1380 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1382 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1383 (cfgte->unique_flags1 & 0x80) == 0);
1385 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
1386 retval = (RES_BUS(cfgte->resource_address) !=
1387 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1391 /* attributes supported by pmcraid_event_family */
1393 PMCRAID_AEN_ATTR_UNSPEC,
1394 PMCRAID_AEN_ATTR_EVENT,
1395 __PMCRAID_AEN_ATTR_MAX,
1397 #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1399 /* commands supported by pmcraid_event_family */
1401 PMCRAID_AEN_CMD_UNSPEC,
1402 PMCRAID_AEN_CMD_EVENT,
1403 __PMCRAID_AEN_CMD_MAX,
1405 #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1407 static struct genl_family pmcraid_event_family = {
1408 .id = GENL_ID_GENERATE,
1411 .maxattr = PMCRAID_AEN_ATTR_MAX
1415 * pmcraid_netlink_init - registers pmcraid_event_family
1418 * 0 if the pmcraid_event_family is successfully registered
1419 * with netlink generic, non-zero otherwise
1421 static int pmcraid_netlink_init(void)
1425 result = genl_register_family(&pmcraid_event_family);
1430 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1431 pmcraid_event_family.id);
1437 * pmcraid_netlink_release - unregisters pmcraid_event_family
1442 static void pmcraid_netlink_release(void)
1444 genl_unregister_family(&pmcraid_event_family);
1448 * pmcraid_notify_aen - sends event msg to user space application
1449 * @pinstance: pointer to adapter instance structure
1453 * 0 if success, error value in case of any failure.
1455 static int pmcraid_notify_aen(
1456 struct pmcraid_instance *pinstance,
1457 struct pmcraid_aen_msg *aen_msg,
1461 struct sk_buff *skb;
1463 u32 total_size, nla_genl_hdr_total_size;
1466 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1467 MINOR(pinstance->cdev.dev));
1468 aen_msg->length = data_size;
1470 data_size += sizeof(*aen_msg);
1472 total_size = nla_total_size(data_size);
1473 /* Add GENL_HDR to total_size */
1474 nla_genl_hdr_total_size =
1475 (total_size + (GENL_HDRLEN +
1476 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1478 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
1482 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1487 /* add the genetlink message header */
1488 msg_header = genlmsg_put(skb, 0, 0,
1489 &pmcraid_event_family, 0,
1490 PMCRAID_AEN_CMD_EVENT);
1492 pmcraid_err("failed to copy command details\n");
1497 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1500 pmcraid_err("failed to copy AEN attribute data\n");
1505 /* send genetlink multicast message to notify appplications */
1506 result = genlmsg_end(skb, msg_header);
1509 pmcraid_err("genlmsg_end failed\n");
1515 genlmsg_multicast(&pmcraid_event_family, skb, 0,
1516 pmcraid_event_family.id, GFP_ATOMIC);
1518 /* If there are no listeners, genlmsg_multicast may return non-zero
1522 pmcraid_info("error (%x) sending aen event message\n", result);
1527 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1528 * @pinstance: pointer adapter instance structure
1531 * 0 if success, error value in case of any failure
1533 static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1535 return pmcraid_notify_aen(pinstance,
1537 pinstance->ccn.hcam->data_len +
1538 sizeof(struct pmcraid_hcam_hdr));
1542 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1543 * @pinstance: pointer adapter instance structure
1546 * 0 if success, error value in case of any failure
1548 static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1550 return pmcraid_notify_aen(pinstance,
1552 pinstance->ldn.hcam->data_len +
1553 sizeof(struct pmcraid_hcam_hdr));
1557 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1558 * @pinstance: pointer adapter instance structure
1559 * @evt: controller state event to be sent
1562 * 0 if success, error value in case of any failure
1564 static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1566 pinstance->scn.ioa_state = evt;
1567 pmcraid_notify_aen(pinstance,
1568 &pinstance->scn.msg,
1573 * pmcraid_handle_config_change - Handle a config change from the adapter
1574 * @pinstance: pointer to per adapter instance structure
1580 static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1582 struct pmcraid_config_table_entry *cfg_entry;
1583 struct pmcraid_hcam_ccn *ccn_hcam;
1584 struct pmcraid_cmd *cmd;
1585 struct pmcraid_cmd *cfgcmd;
1586 struct pmcraid_resource_entry *res = NULL;
1587 unsigned long lock_flags;
1588 unsigned long host_lock_flags;
1590 u32 hidden_entry = 0;
1594 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1595 cfg_entry = &ccn_hcam->cfg_entry;
1596 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1598 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1599 res: %x:%x:%x:%x\n",
1600 pinstance->ccn.hcam->ilid,
1601 pinstance->ccn.hcam->op_code,
1602 ((pinstance->ccn.hcam->timestamp1) |
1603 ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
1604 pinstance->ccn.hcam->notification_type,
1605 pinstance->ccn.hcam->notification_lost,
1606 pinstance->ccn.hcam->flags,
1607 pinstance->host->unique_id,
1608 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1609 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1610 RES_BUS(cfg_entry->resource_address)),
1611 RES_IS_VSET(*cfg_entry) ?
1612 (fw_version <= PMCRAID_FW_VERSION_1 ?
1613 cfg_entry->unique_flags1 :
1614 cfg_entry->array_id & 0xFF) :
1615 RES_TARGET(cfg_entry->resource_address),
1616 RES_LUN(cfg_entry->resource_address));
1619 /* If this HCAM indicates a lost notification, read the config table */
1620 if (pinstance->ccn.hcam->notification_lost) {
1621 cfgcmd = pmcraid_get_free_cmd(pinstance);
1623 pmcraid_info("lost CCN, reading config table\b");
1624 pinstance->reinit_cfg_table = 1;
1625 pmcraid_querycfg(cfgcmd);
1627 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1629 goto out_notify_apps;
1632 /* If this resource is not going to be added to mid-layer, just notify
1633 * applications and return. If this notification is about hiding a VSET
1634 * resource, check if it was exposed already.
1636 if (pinstance->ccn.hcam->notification_type ==
1637 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1638 cfg_entry->resource_type == RES_TYPE_VSET) {
1640 if (fw_version <= PMCRAID_FW_VERSION_1)
1641 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1643 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1645 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1646 goto out_notify_apps;
1649 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1650 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1651 rc = memcmp(&res->cfg_entry.resource_address,
1652 &cfg_entry->resource_address,
1653 sizeof(cfg_entry->resource_address));
1663 spin_unlock_irqrestore(&pinstance->resource_lock,
1665 goto out_notify_apps;
1668 /* If there are more number of resources than what driver can
1669 * manage, do not notify the applications about the CCN. Just
1670 * ignore this notifications and re-register the same HCAM
1672 if (list_empty(&pinstance->free_res_q)) {
1673 spin_unlock_irqrestore(&pinstance->resource_lock,
1675 pmcraid_err("too many resources attached\n");
1676 spin_lock_irqsave(pinstance->host->host_lock,
1678 pmcraid_send_hcam(pinstance,
1679 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1680 spin_unlock_irqrestore(pinstance->host->host_lock,
1685 res = list_entry(pinstance->free_res_q.next,
1686 struct pmcraid_resource_entry, queue);
1688 list_del(&res->queue);
1689 res->scsi_dev = NULL;
1690 res->reset_progress = 0;
1691 list_add_tail(&res->queue, &pinstance->used_res_q);
1694 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1696 if (pinstance->ccn.hcam->notification_type ==
1697 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1698 if (res->scsi_dev) {
1699 if (fw_version <= PMCRAID_FW_VERSION_1)
1700 res->cfg_entry.unique_flags1 &= 0x7F;
1702 res->cfg_entry.array_id &= 0xFF;
1703 res->change_detected = RES_CHANGE_DEL;
1704 res->cfg_entry.resource_handle =
1705 PMCRAID_INVALID_RES_HANDLE;
1706 schedule_work(&pinstance->worker_q);
1708 /* This may be one of the non-exposed resources */
1709 list_move_tail(&res->queue, &pinstance->free_res_q);
1711 } else if (!res->scsi_dev) {
1712 res->change_detected = RES_CHANGE_ADD;
1713 schedule_work(&pinstance->worker_q);
1715 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1719 /* Notify configuration changes to registered applications.*/
1720 if (!pmcraid_disable_aen)
1721 pmcraid_notify_ccn(pinstance);
1723 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1725 pmcraid_send_hcam_cmd(cmd);
1729 * pmcraid_get_error_info - return error string for an ioasc
1730 * @ioasc: ioasc code
1734 static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1737 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1738 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1739 return &pmcraid_ioasc_error_table[i];
1745 * pmcraid_ioasc_logger - log IOASC information based user-settings
1746 * @ioasc: ioasc code
1747 * @cmd: pointer to command that resulted in 'ioasc'
1749 void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1751 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1753 if (error_info == NULL ||
1754 cmd->drv_inst->current_log_level < error_info->log_level)
1757 /* log the error string */
1758 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1759 cmd->ioa_cb->ioarcb.cdb[0],
1760 cmd->ioa_cb->ioarcb.resource_handle,
1761 le32_to_cpu(ioasc), error_info->error_string);
1765 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1767 * @pinstance: pointer to per adapter instance structure
1772 static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1774 struct pmcraid_hcam_ldn *hcam_ldn;
1777 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1780 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1781 pinstance->ldn.hcam->ilid,
1782 pinstance->ldn.hcam->op_code,
1783 pinstance->ldn.hcam->notification_type,
1784 pinstance->ldn.hcam->notification_lost,
1785 pinstance->ldn.hcam->flags,
1786 pinstance->ldn.hcam->overlay_id);
1788 /* log only the errors, no need to log informational log entries */
1789 if (pinstance->ldn.hcam->notification_type !=
1790 NOTIFICATION_TYPE_ERROR_LOG)
1793 if (pinstance->ldn.hcam->notification_lost ==
1794 HOSTRCB_NOTIFICATIONS_LOST)
1795 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1797 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1799 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1800 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1801 dev_info(&pinstance->pdev->dev,
1802 "UnitAttention due to IOA Bus Reset\n");
1803 scsi_report_bus_reset(
1805 RES_BUS(hcam_ldn->error_log.fd_ra));
1812 * pmcraid_process_ccn - Op done function for a CCN.
1813 * @cmd: pointer to command struct
1815 * This function is the op done function for a configuration
1816 * change notification
1821 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1823 struct pmcraid_instance *pinstance = cmd->drv_inst;
1824 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1825 unsigned long lock_flags;
1827 pinstance->ccn.cmd = NULL;
1828 pmcraid_return_cmd(cmd);
1830 /* If driver initiated IOA reset happened while this hcam was pending
1831 * with IOA, or IOA bringdown sequence is in progress, no need to
1832 * re-register the hcam
1834 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1835 atomic_read(&pinstance->ccn.ignore) == 1) {
1838 dev_info(&pinstance->pdev->dev,
1839 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1840 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1841 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1842 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1844 pmcraid_handle_config_change(pinstance);
1849 * pmcraid_process_ldn - op done function for an LDN
1850 * @cmd: pointer to command block
1855 static void pmcraid_initiate_reset(struct pmcraid_instance *);
1856 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1858 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1860 struct pmcraid_instance *pinstance = cmd->drv_inst;
1861 struct pmcraid_hcam_ldn *ldn_hcam =
1862 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1863 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1864 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1865 unsigned long lock_flags;
1867 /* return the command block back to freepool */
1868 pinstance->ldn.cmd = NULL;
1869 pmcraid_return_cmd(cmd);
1871 /* If driver initiated IOA reset happened while this hcam was pending
1872 * with IOA, no need to re-register the hcam as reset engine will do it
1873 * once reset sequence is complete
1875 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1876 atomic_read(&pinstance->ccn.ignore) == 1) {
1878 } else if (!ioasc) {
1879 pmcraid_handle_error_log(pinstance);
1880 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1881 spin_lock_irqsave(pinstance->host->host_lock,
1883 pmcraid_initiate_reset(pinstance);
1884 spin_unlock_irqrestore(pinstance->host->host_lock,
1888 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1889 pinstance->timestamp_error = 1;
1890 pmcraid_set_timestamp(cmd);
1893 dev_info(&pinstance->pdev->dev,
1894 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1896 /* send netlink message for HCAM notification if enabled */
1897 if (!pmcraid_disable_aen)
1898 pmcraid_notify_ldn(pinstance);
1900 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1902 pmcraid_send_hcam_cmd(cmd);
1906 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1908 * @pinstance: pointer per adapter instance structure
1913 static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1915 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1916 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1920 * pmcraid_unregister_hcams - cancel HCAMs registered already
1921 * @cmd: pointer to command used as part of reset sequence
1923 static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1925 struct pmcraid_instance *pinstance = cmd->drv_inst;
1927 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1928 * handling hcam response though it is not necessary. In order to
1929 * prevent this, set 'ignore', so that bring-down sequence doesn't
1930 * re-send any more hcams
1932 atomic_set(&pinstance->ccn.ignore, 1);
1933 atomic_set(&pinstance->ldn.ignore, 1);
1935 /* If adapter reset was forced as part of runtime reset sequence,
1936 * start the reset sequence. Reset will be triggered even in case
1939 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1940 pinstance->ioa_unit_check) {
1941 pinstance->force_ioa_reset = 0;
1942 pinstance->ioa_unit_check = 0;
1943 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1944 pmcraid_reset_alert(cmd);
1948 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1949 * one after the other. So CCN cancellation will be triggered by
1950 * pmcraid_cancel_ldn itself.
1952 pmcraid_cancel_ldn(cmd);
1956 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1957 * @pinstance: pointer to adapter instance structure
1959 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1961 static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1963 static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1967 pmcraid_reinit_buffers(pinstance);
1968 intrs = pmcraid_read_interrupts(pinstance);
1970 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1972 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1973 if (!pinstance->interrupt_mode) {
1974 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1975 pinstance->int_regs.
1976 ioa_host_interrupt_mask_reg);
1977 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1978 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1987 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1988 * @cmd : pointer to reset command block
1993 static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1995 struct pmcraid_instance *pinstance = cmd->drv_inst;
1999 /* There will be an interrupt when Transition to Operational bit is
2000 * set so tasklet would execute next reset task. The timeout handler
2001 * would re-initiate a reset
2003 cmd->cmd_done = pmcraid_ioa_reset;
2004 cmd->timer.data = (unsigned long)cmd;
2005 cmd->timer.expires = jiffies +
2006 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
2007 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2009 if (!timer_pending(&cmd->timer))
2010 add_timer(&cmd->timer);
2012 /* Enable destructive diagnostics on IOA if it is not yet in
2015 doorbell = DOORBELL_RUNTIME_RESET |
2016 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2018 /* Since we do RESET_ALERT and Start BIST we have to again write
2019 * MSIX Doorbell to indicate the interrupt mode
2021 if (pinstance->interrupt_mode) {
2022 iowrite32(DOORBELL_INTR_MODE_MSIX,
2023 pinstance->int_regs.host_ioa_interrupt_reg);
2024 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2027 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
2028 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2029 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
2031 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2032 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2037 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2039 * @pinstance: pointer to adapter instance structure
2044 static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2046 pmcraid_info("%s is not yet implemented\n", __func__);
2050 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2051 * @pinstance: pointer to adapter instance structure
2053 * This function fails all outstanding ops. If they are submitted to IOA
2054 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2055 * otherwise just completes the commands and returns the cmd blocks to free
2061 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2063 struct pmcraid_cmd *cmd, *temp;
2064 unsigned long lock_flags;
2066 /* pending command list is protected by pending_pool_lock. Its
2067 * traversal must be done as within this lock
2069 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2070 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2072 list_del(&cmd->free_list);
2073 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2075 cmd->ioa_cb->ioasa.ioasc =
2076 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2077 cmd->ioa_cb->ioasa.ilid =
2078 cpu_to_be32(PMCRAID_DRIVER_ILID);
2080 /* In case the command timer is still running */
2081 del_timer(&cmd->timer);
2083 /* If this is an IO command, complete it by invoking scsi_done
2084 * function. If this is one of the internal commands other
2085 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2088 if (cmd->scsi_cmd) {
2090 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2091 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2093 scsi_cmd->result |= DID_ERROR << 16;
2095 scsi_dma_unmap(scsi_cmd);
2096 pmcraid_return_cmd(cmd);
2098 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2099 le32_to_cpu(resp) >> 2,
2100 cmd->ioa_cb->ioarcb.cdb[0],
2102 scsi_cmd->scsi_done(scsi_cmd);
2103 } else if (cmd->cmd_done == pmcraid_internal_done ||
2104 cmd->cmd_done == pmcraid_erp_done) {
2106 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2107 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2108 pmcraid_return_cmd(cmd);
2111 atomic_dec(&pinstance->outstanding_cmds);
2112 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2115 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2119 * pmcraid_ioa_reset - Implementation of IOA reset logic
2121 * @cmd: pointer to the cmd block to be used for entire reset process
2123 * This function executes most of the steps required for IOA reset. This gets
2124 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2125 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2126 * synchronized using host lock. Various functions called during reset process
2127 * would make use of a single command block, pointer to which is also stored in
2128 * adapter instance structure.
2133 static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2135 struct pmcraid_instance *pinstance = cmd->drv_inst;
2136 u8 reset_complete = 0;
2138 pinstance->ioa_reset_in_progress = 1;
2140 if (pinstance->reset_cmd != cmd) {
2141 pmcraid_err("reset is called with different command block\n");
2142 pinstance->reset_cmd = cmd;
2145 pmcraid_info("reset_engine: state = %d, command = %p\n",
2146 pinstance->ioa_state, cmd);
2148 switch (pinstance->ioa_state) {
2150 case IOA_STATE_DEAD:
2151 /* If IOA is offline, whatever may be the reset reason, just
2152 * return. callers might be waiting on the reset wait_q, wake
2155 pmcraid_err("IOA is offline no reset is possible\n");
2159 case IOA_STATE_IN_BRINGDOWN:
2160 /* we enter here, once ioa shutdown command is processed by IOA
2161 * Alert IOA for a possible reset. If reset alert fails, IOA
2162 * goes through hard-reset
2164 pmcraid_disable_interrupts(pinstance, ~0);
2165 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2166 pmcraid_reset_alert(cmd);
2169 case IOA_STATE_UNKNOWN:
2170 /* We may be called during probe or resume. Some pre-processing
2171 * is required for prior to reset
2173 scsi_block_requests(pinstance->host);
2175 /* If asked to reset while IOA was processing responses or
2176 * there are any error responses then IOA may require
2179 if (pinstance->ioa_hard_reset == 0) {
2180 if (ioread32(pinstance->ioa_status) &
2181 INTRS_TRANSITION_TO_OPERATIONAL) {
2182 pmcraid_info("sticky bit set, bring-up\n");
2183 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2184 pmcraid_reinit_cmdblk(cmd);
2185 pmcraid_identify_hrrq(cmd);
2187 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2188 pmcraid_soft_reset(cmd);
2191 /* Alert IOA of a possible reset and wait for critical
2192 * operation in progress bit to reset
2194 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2195 pmcraid_reset_alert(cmd);
2199 case IOA_STATE_IN_RESET_ALERT:
2200 /* If critical operation in progress bit is reset or wait gets
2201 * timed out, reset proceeds with starting BIST on the IOA.
2202 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2203 * they are 3 or more, reset engine marks IOA dead and returns
2205 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2206 pmcraid_start_bist(cmd);
2209 case IOA_STATE_IN_HARD_RESET:
2210 pinstance->ioa_reset_attempts++;
2212 /* retry reset if we haven't reached maximum allowed limit */
2213 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2214 pinstance->ioa_reset_attempts = 0;
2215 pmcraid_err("IOA didn't respond marking it as dead\n");
2216 pinstance->ioa_state = IOA_STATE_DEAD;
2218 if (pinstance->ioa_bringdown)
2219 pmcraid_notify_ioastate(pinstance,
2220 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2222 pmcraid_notify_ioastate(pinstance,
2223 PMC_DEVICE_EVENT_RESET_FAILED);
2228 /* Once either bist or pci reset is done, restore PCI config
2229 * space. If this fails, proceed with hard reset again
2231 pci_restore_state(pinstance->pdev);
2233 /* fail all pending commands */
2234 pmcraid_fail_outstanding_cmds(pinstance);
2236 /* check if unit check is active, if so extract dump */
2237 if (pinstance->ioa_unit_check) {
2238 pmcraid_info("unit check is active\n");
2239 pinstance->ioa_unit_check = 0;
2240 pmcraid_get_dump(pinstance);
2241 pinstance->ioa_reset_attempts--;
2242 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2243 pmcraid_reset_alert(cmd);
2247 /* if the reset reason is to bring-down the ioa, we might be
2248 * done with the reset restore pci_config_space and complete
2251 if (pinstance->ioa_bringdown) {
2252 pmcraid_info("bringing down the adapter\n");
2253 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2254 pinstance->ioa_bringdown = 0;
2255 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2256 pmcraid_notify_ioastate(pinstance,
2257 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2260 /* bring-up IOA, so proceed with soft reset
2261 * Reinitialize hrrq_buffers and their indices also
2262 * enable interrupts after a pci_restore_state
2264 if (pmcraid_reset_enable_ioa(pinstance)) {
2265 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2266 pmcraid_info("bringing up the adapter\n");
2267 pmcraid_reinit_cmdblk(cmd);
2268 pmcraid_identify_hrrq(cmd);
2270 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2271 pmcraid_soft_reset(cmd);
2276 case IOA_STATE_IN_SOFT_RESET:
2277 /* TRANSITION TO OPERATIONAL is on so start initialization
2280 pmcraid_info("In softreset proceeding with bring-up\n");
2281 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2283 /* Initialization commands start with HRRQ identification. From
2284 * now on tasklet completes most of the commands as IOA is up
2285 * and intrs are enabled
2287 pmcraid_identify_hrrq(cmd);
2290 case IOA_STATE_IN_BRINGUP:
2291 /* we are done with bringing up of IOA, change the ioa_state to
2292 * operational and wake up any waiters
2294 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2298 case IOA_STATE_OPERATIONAL:
2300 /* When IOA is operational and a reset is requested, check for
2301 * the reset reason. If reset is to bring down IOA, unregister
2302 * HCAMs and initiate shutdown; if adapter reset is forced then
2303 * restart reset sequence again
2305 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2306 pinstance->force_ioa_reset == 0) {
2307 pmcraid_notify_ioastate(pinstance,
2308 PMC_DEVICE_EVENT_RESET_SUCCESS);
2311 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2312 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2313 pmcraid_reinit_cmdblk(cmd);
2314 pmcraid_unregister_hcams(cmd);
2319 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2320 * OPERATIONAL. Reset all control variables used during reset, wake up
2321 * any waiting threads and let the SCSI mid-layer send commands. Note
2322 * that host_lock must be held before invoking scsi_report_bus_reset.
2324 if (reset_complete) {
2325 pinstance->ioa_reset_in_progress = 0;
2326 pinstance->ioa_reset_attempts = 0;
2327 pinstance->reset_cmd = NULL;
2328 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2329 pinstance->ioa_bringdown = 0;
2330 pmcraid_return_cmd(cmd);
2332 /* If target state is to bring up the adapter, proceed with
2333 * hcam registration and resource exposure to mid-layer.
2335 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2336 pmcraid_register_hcams(pinstance);
2338 wake_up_all(&pinstance->reset_wait_q);
2345 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2346 * ISR/tasklet during error interrupts including IOA unit check. If reset
2347 * is already in progress, it just returns, otherwise initiates IOA reset
2348 * to bring IOA up to operational state.
2350 * @pinstance: pointer to adapter instance structure
2355 static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2357 struct pmcraid_cmd *cmd;
2359 /* If the reset is already in progress, just return, otherwise start
2360 * reset sequence and return
2362 if (!pinstance->ioa_reset_in_progress) {
2363 scsi_block_requests(pinstance->host);
2364 cmd = pmcraid_get_free_cmd(pinstance);
2367 pmcraid_err("no cmnd blocks for initiate_reset\n");
2371 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2372 pinstance->reset_cmd = cmd;
2373 pinstance->force_ioa_reset = 1;
2374 pmcraid_notify_ioastate(pinstance,
2375 PMC_DEVICE_EVENT_RESET_START);
2376 pmcraid_ioa_reset(cmd);
2381 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2383 * @pinstance: pointer adapter instance structure
2384 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2385 * @target_state: expected target state after reset
2387 * Note: This command initiates reset and waits for its completion. Hence this
2388 * should not be called from isr/timer/tasklet functions (timeout handlers,
2389 * error response handlers and interrupt handlers).
2392 * 1 in case ioa_state is not target_state, 0 otherwise.
2394 static int pmcraid_reset_reload(
2395 struct pmcraid_instance *pinstance,
2400 struct pmcraid_cmd *reset_cmd = NULL;
2401 unsigned long lock_flags;
2404 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2406 if (pinstance->ioa_reset_in_progress) {
2407 pmcraid_info("reset_reload: reset is already in progress\n");
2409 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2411 wait_event(pinstance->reset_wait_q,
2412 !pinstance->ioa_reset_in_progress);
2414 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2416 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2417 spin_unlock_irqrestore(pinstance->host->host_lock,
2419 pmcraid_info("reset_reload: IOA is dead\n");
2421 } else if (pinstance->ioa_state == target_state) {
2427 pmcraid_info("reset_reload: proceeding with reset\n");
2428 scsi_block_requests(pinstance->host);
2429 reset_cmd = pmcraid_get_free_cmd(pinstance);
2431 if (reset_cmd == NULL) {
2432 pmcraid_err("no free cmnd for reset_reload\n");
2433 spin_unlock_irqrestore(pinstance->host->host_lock,
2438 if (shutdown_type == SHUTDOWN_NORMAL)
2439 pinstance->ioa_bringdown = 1;
2441 pinstance->ioa_shutdown_type = shutdown_type;
2442 pinstance->reset_cmd = reset_cmd;
2443 pinstance->force_ioa_reset = reset;
2444 pmcraid_info("reset_reload: initiating reset\n");
2445 pmcraid_ioa_reset(reset_cmd);
2446 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2447 pmcraid_info("reset_reload: waiting for reset to complete\n");
2448 wait_event(pinstance->reset_wait_q,
2449 !pinstance->ioa_reset_in_progress);
2451 pmcraid_info("reset_reload: reset is complete !!\n");
2452 scsi_unblock_requests(pinstance->host);
2453 if (pinstance->ioa_state == target_state)
2461 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2463 * @pinstance: pointer to adapter instance structure
2466 * whatever is returned from pmcraid_reset_reload
2468 static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2470 return pmcraid_reset_reload(pinstance,
2476 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2478 * @pinstance: pointer to adapter instance structure
2481 * whatever is returned from pmcraid_reset_reload
2483 static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2485 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2487 return pmcraid_reset_reload(pinstance,
2489 IOA_STATE_OPERATIONAL);
2493 * pmcraid_request_sense - Send request sense to a device
2494 * @cmd: pmcraid command struct
2496 * This function sends a request sense to a device as a result of a check
2497 * condition. This method re-uses the same command block that failed earlier.
2499 static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2501 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2502 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2504 /* allocate DMAable memory for sense buffers */
2505 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2506 SCSI_SENSE_BUFFERSIZE,
2507 &cmd->sense_buffer_dma);
2509 if (cmd->sense_buffer == NULL) {
2511 ("couldn't allocate sense buffer for request sense\n");
2512 pmcraid_erp_done(cmd);
2516 /* re-use the command block */
2517 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2518 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2519 ioarcb->request_flags0 = (SYNC_COMPLETE |
2522 ioarcb->request_type = REQ_TYPE_SCSI;
2523 ioarcb->cdb[0] = REQUEST_SENSE;
2524 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2526 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2527 offsetof(struct pmcraid_ioarcb,
2528 add_data.u.ioadl[0]));
2529 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2531 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2533 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2534 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2535 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2537 /* request sense might be called as part of error response processing
2538 * which runs in tasklets context. It is possible that mid-layer might
2539 * schedule queuecommand during this time, hence, writting to IOARRIN
2540 * must be protect by host_lock
2542 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2543 PMCRAID_REQUEST_SENSE_TIMEOUT,
2544 pmcraid_timeout_handler);
2548 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2549 * @cmd: command that failed
2550 * @sense: true if request_sense is required after cancel all
2552 * This function sends a cancel all to a device to clear the queue.
2554 static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2556 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2557 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2558 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2559 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2560 : pmcraid_request_sense;
2562 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2563 ioarcb->request_flags0 = SYNC_OVERRIDE;
2564 ioarcb->request_type = REQ_TYPE_IOACMD;
2565 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2567 if (RES_IS_GSCSI(res->cfg_entry))
2568 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2570 ioarcb->ioadl_bus_addr = 0;
2571 ioarcb->ioadl_length = 0;
2572 ioarcb->data_transfer_length = 0;
2573 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2575 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2576 * schedule queuecommand while we are doing this
2578 pmcraid_send_cmd(cmd, cmd_done,
2579 PMCRAID_REQUEST_SENSE_TIMEOUT,
2580 pmcraid_timeout_handler);
2584 * pmcraid_frame_auto_sense: frame fixed format sense information
2586 * @cmd: pointer to failing command block
2591 static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2593 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2594 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2595 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2596 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2597 u32 failing_lba = 0;
2599 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2600 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2602 if (RES_IS_VSET(res->cfg_entry) &&
2603 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2604 ioasa->u.vset.failing_lba_hi != 0) {
2606 sense_buf[0] = 0x72;
2607 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2608 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2609 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2613 sense_buf[9] = 0x0A;
2614 sense_buf[10] = 0x80;
2616 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2618 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2619 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2620 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2621 sense_buf[15] = failing_lba & 0x000000ff;
2623 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2625 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2626 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2627 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2628 sense_buf[19] = failing_lba & 0x000000ff;
2630 sense_buf[0] = 0x70;
2631 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2632 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2633 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2635 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2636 if (RES_IS_VSET(res->cfg_entry))
2638 le32_to_cpu(ioasa->u.
2639 vset.failing_lba_lo);
2640 sense_buf[0] |= 0x80;
2641 sense_buf[3] = (failing_lba >> 24) & 0xff;
2642 sense_buf[4] = (failing_lba >> 16) & 0xff;
2643 sense_buf[5] = (failing_lba >> 8) & 0xff;
2644 sense_buf[6] = failing_lba & 0xff;
2647 sense_buf[7] = 6; /* additional length */
2652 * pmcraid_error_handler - Error response handlers for a SCSI op
2653 * @cmd: pointer to pmcraid_cmd that has failed
2655 * This function determines whether or not to initiate ERP on the affected
2656 * device. This is called from a tasklet, which doesn't hold any locks.
2659 * 0 it caller can complete the request, otherwise 1 where in error
2660 * handler itself completes the request and returns the command block
2663 static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2665 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2666 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2667 struct pmcraid_instance *pinstance = cmd->drv_inst;
2668 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2669 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2670 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2671 u32 sense_copied = 0;
2674 pmcraid_info("resource pointer is NULL\n");
2678 /* If this was a SCSI read/write command keep count of errors */
2679 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2680 atomic_inc(&res->read_failures);
2681 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2682 atomic_inc(&res->write_failures);
2684 if (!RES_IS_GSCSI(res->cfg_entry) &&
2685 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2686 pmcraid_frame_auto_sense(cmd);
2689 /* Log IOASC/IOASA information based on user settings */
2690 pmcraid_ioasc_logger(ioasc, cmd);
2692 switch (masked_ioasc) {
2694 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2695 scsi_cmd->result |= (DID_ABORT << 16);
2698 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2699 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2700 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2703 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2705 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2708 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2709 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2712 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2713 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2714 if (!res->reset_progress)
2715 scsi_report_bus_reset(pinstance->host,
2716 scsi_cmd->device->channel);
2717 scsi_cmd->result |= (DID_ERROR << 16);
2720 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2721 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2724 /* if check_condition is not active return with error otherwise
2725 * get/frame the sense buffer
2727 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2728 SAM_STAT_CHECK_CONDITION &&
2729 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2732 /* If we have auto sense data as part of IOASA pass it to
2735 if (ioasa->auto_sense_length != 0) {
2736 short sense_len = ioasa->auto_sense_length;
2737 int data_size = min_t(u16, le16_to_cpu(sense_len),
2738 SCSI_SENSE_BUFFERSIZE);
2740 memcpy(scsi_cmd->sense_buffer,
2746 if (RES_IS_GSCSI(res->cfg_entry))
2747 pmcraid_cancel_all(cmd, sense_copied);
2748 else if (sense_copied)
2749 pmcraid_erp_done(cmd);
2751 pmcraid_request_sense(cmd);
2755 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2759 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2760 scsi_cmd->result |= (DID_ERROR << 16);
2767 * pmcraid_reset_device - device reset handler functions
2769 * @scsi_cmd: scsi command struct
2770 * @modifier: reset modifier indicating the reset sequence to be performed
2772 * This function issues a device reset to the affected device.
2773 * A LUN reset will be sent to the device first. If that does
2774 * not work, a target reset will be sent.
2779 static int pmcraid_reset_device(
2780 struct scsi_cmnd *scsi_cmd,
2781 unsigned long timeout,
2785 struct pmcraid_cmd *cmd;
2786 struct pmcraid_instance *pinstance;
2787 struct pmcraid_resource_entry *res;
2788 struct pmcraid_ioarcb *ioarcb;
2789 unsigned long lock_flags;
2793 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2794 res = scsi_cmd->device->hostdata;
2797 sdev_printk(KERN_ERR, scsi_cmd->device,
2798 "reset_device: NULL resource pointer\n");
2802 /* If adapter is currently going through reset/reload, return failed.
2803 * This will force the mid-layer to call _eh_bus/host reset, which
2804 * will then go to sleep and wait for the reset to complete
2806 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2807 if (pinstance->ioa_reset_in_progress ||
2808 pinstance->ioa_state == IOA_STATE_DEAD) {
2809 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2813 res->reset_progress = 1;
2814 pmcraid_info("Resetting %s resource with addr %x\n",
2815 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2816 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2817 le32_to_cpu(res->cfg_entry.resource_address));
2819 /* get a free cmd block */
2820 cmd = pmcraid_get_free_cmd(pinstance);
2823 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2824 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2828 ioarcb = &cmd->ioa_cb->ioarcb;
2829 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2830 ioarcb->request_type = REQ_TYPE_IOACMD;
2831 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2833 /* Initialize reset modifier bits */
2835 modifier = ENABLE_RESET_MODIFIER | modifier;
2837 ioarcb->cdb[1] = modifier;
2839 init_completion(&cmd->wait_for_completion);
2840 cmd->completion_req = 1;
2842 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2843 cmd->ioa_cb->ioarcb.cdb[0],
2844 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2845 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2847 pmcraid_send_cmd(cmd,
2848 pmcraid_internal_done,
2850 pmcraid_timeout_handler);
2852 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2854 /* RESET_DEVICE command completes after all pending IOARCBs are
2855 * completed. Once this command is completed, pmcraind_internal_done
2856 * will wake up the 'completion' queue.
2858 wait_for_completion(&cmd->wait_for_completion);
2860 /* complete the command here itself and return the command block
2863 pmcraid_return_cmd(cmd);
2864 res->reset_progress = 0;
2865 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2867 /* set the return value based on the returned ioasc */
2868 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2872 * _pmcraid_io_done - helper for pmcraid_io_done function
2874 * @cmd: pointer to pmcraid command struct
2875 * @reslen: residual data length to be set in the ioasa
2876 * @ioasc: ioasc either returned by IOA or set by driver itself.
2878 * This function is invoked by pmcraid_io_done to complete mid-layer
2882 * 0 if caller is required to return it to free_pool. Returns 1 if
2883 * caller need not worry about freeing command block as error handler
2884 * will take care of that.
2887 static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2889 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2892 scsi_set_resid(scsi_cmd, reslen);
2894 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2895 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2896 cmd->ioa_cb->ioarcb.cdb[0],
2897 ioasc, scsi_cmd->result);
2899 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2900 rc = pmcraid_error_handler(cmd);
2903 scsi_dma_unmap(scsi_cmd);
2904 scsi_cmd->scsi_done(scsi_cmd);
2911 * pmcraid_io_done - SCSI completion function
2913 * @cmd: pointer to pmcraid command struct
2915 * This function is invoked by tasklet/mid-layer error handler to completing
2916 * the SCSI ops sent from mid-layer.
2922 static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2924 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2925 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2927 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2928 pmcraid_return_cmd(cmd);
2932 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2934 * @cmd: command block of the command to be aborted
2937 * returns pointer to command structure used as cancelling cmd
2939 static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2941 struct pmcraid_cmd *cancel_cmd;
2942 struct pmcraid_instance *pinstance;
2943 struct pmcraid_resource_entry *res;
2945 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2946 res = cmd->scsi_cmd->device->hostdata;
2948 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2950 if (cancel_cmd == NULL) {
2951 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2955 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2957 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2958 cmd->ioa_cb->ioarcb.cdb[0],
2959 cmd->ioa_cb->ioarcb.response_handle >> 2);
2961 init_completion(&cancel_cmd->wait_for_completion);
2962 cancel_cmd->completion_req = 1;
2964 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2965 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2966 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2967 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2969 pmcraid_send_cmd(cancel_cmd,
2970 pmcraid_internal_done,
2971 PMCRAID_INTERNAL_TIMEOUT,
2972 pmcraid_timeout_handler);
2977 * pmcraid_abort_complete - Waits for ABORT TASK completion
2979 * @cancel_cmd: command block use as cancelling command
2982 * returns SUCCESS if ABORT TASK has good completion
2985 static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2987 struct pmcraid_resource_entry *res;
2990 wait_for_completion(&cancel_cmd->wait_for_completion);
2991 res = cancel_cmd->res;
2992 cancel_cmd->res = NULL;
2993 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2995 /* If the abort task is not timed out we will get a Good completion
2996 * as sense_key, otherwise we may get one the following responses
2997 * due to subsequent bus reset or device reset. In case IOASC is
2998 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
3000 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
3001 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
3002 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3007 /* complete the command here itself */
3008 pmcraid_return_cmd(cancel_cmd);
3009 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3013 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3015 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3016 * mid-layer ensures that no other commands are queued. This
3017 * never gets called under interrupt, but a separate eh thread.
3022 static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3024 struct pmcraid_instance *pinstance;
3025 struct pmcraid_cmd *cmd;
3026 struct pmcraid_resource_entry *res;
3027 unsigned long host_lock_flags;
3028 unsigned long pending_lock_flags;
3029 struct pmcraid_cmd *cancel_cmd = NULL;
3034 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3036 scmd_printk(KERN_INFO, scsi_cmd,
3037 "I/O command timed out, aborting it.\n");
3039 res = scsi_cmd->device->hostdata;
3044 /* If we are currently going through reset/reload, return failed.
3045 * This will force the mid-layer to eventually call
3046 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3049 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3051 if (pinstance->ioa_reset_in_progress ||
3052 pinstance->ioa_state == IOA_STATE_DEAD) {
3053 spin_unlock_irqrestore(pinstance->host->host_lock,
3058 /* loop over pending cmd list to find cmd corresponding to this
3059 * scsi_cmd. Note that this command might not have been completed
3060 * already. locking: all pending commands are protected with
3061 * pending_pool_lock.
3063 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3064 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3066 if (cmd->scsi_cmd == scsi_cmd) {
3072 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3073 pending_lock_flags);
3075 /* If the command to be aborted was given to IOA and still pending with
3076 * it, send ABORT_TASK to abort this and wait for its completion
3079 cancel_cmd = pmcraid_abort_cmd(cmd);
3081 spin_unlock_irqrestore(pinstance->host->host_lock,
3085 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
3086 rc = pmcraid_abort_complete(cancel_cmd);
3089 return cmd_found ? rc : SUCCESS;
3093 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3095 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3097 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3098 * Since these are called from mid-layer EH thread, no other IO will be queued
3099 * to the resource being reset. However, control path (IOCTL) may be active so
3100 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3101 * takes care by locking/unlocking host_lock.
3106 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3108 scmd_printk(KERN_INFO, scmd,
3109 "resetting device due to an I/O command timeout.\n");
3110 return pmcraid_reset_device(scmd,
3111 PMCRAID_INTERNAL_TIMEOUT,
3115 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3117 scmd_printk(KERN_INFO, scmd,
3118 "Doing bus reset due to an I/O command timeout.\n");
3119 return pmcraid_reset_device(scmd,
3120 PMCRAID_RESET_BUS_TIMEOUT,
3124 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3126 scmd_printk(KERN_INFO, scmd,
3127 "Doing target reset due to an I/O command timeout.\n");
3128 return pmcraid_reset_device(scmd,
3129 PMCRAID_INTERNAL_TIMEOUT,
3130 RESET_DEVICE_TARGET);
3134 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3136 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3138 * Initiates adapter reset to bring it up to operational state
3143 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3145 unsigned long interval = 10000; /* 10 seconds interval */
3146 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3147 struct pmcraid_instance *pinstance =
3148 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3151 /* wait for an additional 150 seconds just in case firmware could come
3152 * up and if it could complete all the pending commands excluding the
3153 * two HCAM (CCN and LDN).
3156 if (atomic_read(&pinstance->outstanding_cmds) <=
3157 PMCRAID_MAX_HCAM_CMD)
3162 dev_err(&pinstance->pdev->dev,
3163 "Adapter being reset due to an I/O command timeout.\n");
3164 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3168 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3169 * @scsi_cmd: scsi command struct
3172 * number of tags or 0 if the task is not tagged
3174 static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3179 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3181 case MSG_SIMPLE_TAG:
3182 rc = TASK_TAG_SIMPLE;
3185 rc = TASK_TAG_QUEUE_HEAD;
3187 case MSG_ORDERED_TAG:
3188 rc = TASK_TAG_ORDERED;
3198 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3199 * @cmd: pmcraid command struct
3200 * @sgcount: count of scatter-gather elements
3203 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3204 * or external IOADLs
3206 struct pmcraid_ioadl_desc *
3207 pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3209 struct pmcraid_ioadl_desc *ioadl;
3210 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3211 int ioadl_count = 0;
3213 if (ioarcb->add_cmd_param_length)
3214 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3215 ioarcb->ioadl_length =
3216 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3218 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3219 /* external ioadls start at offset 0x80 from control_block
3220 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3221 * It is necessary to indicate to firmware that driver is
3222 * using ioadls to be treated as external to IOARCB.
3224 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3225 ioarcb->ioadl_bus_addr =
3226 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3227 offsetof(struct pmcraid_ioarcb,
3228 add_data.u.ioadl[3]));
3229 ioadl = &ioarcb->add_data.u.ioadl[3];
3231 ioarcb->ioadl_bus_addr =
3232 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3233 offsetof(struct pmcraid_ioarcb,
3234 add_data.u.ioadl[ioadl_count]));
3236 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3237 ioarcb->ioarcb_bus_addr |=
3238 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3245 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3246 * @pinstance: pointer to adapter instance structure
3247 * @cmd: pmcraid command struct
3249 * This function is invoked by queuecommand entry point while sending a command
3250 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3253 * 0 on success or -1 on failure
3255 static int pmcraid_build_ioadl(
3256 struct pmcraid_instance *pinstance,
3257 struct pmcraid_cmd *cmd
3261 struct scatterlist *sglist;
3263 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3264 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3265 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3267 u32 length = scsi_bufflen(scsi_cmd);
3272 nseg = scsi_dma_map(scsi_cmd);
3275 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3277 } else if (nseg > PMCRAID_MAX_IOADLS) {
3278 scsi_dma_unmap(scsi_cmd);
3279 scmd_printk(KERN_ERR, scsi_cmd,
3280 "sg count is (%d) more than allowed!\n", nseg);
3284 /* Initialize IOARCB data transfer length fields */
3285 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3286 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3288 ioarcb->request_flags0 |= NO_LINK_DESCS;
3289 ioarcb->data_transfer_length = cpu_to_le32(length);
3290 ioadl = pmcraid_init_ioadls(cmd, nseg);
3292 /* Initialize IOADL descriptor addresses */
3293 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3294 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3295 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3298 /* setup last descriptor */
3299 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3305 * pmcraid_free_sglist - Frees an allocated SG buffer list
3306 * @sglist: scatter/gather list pointer
3308 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3313 static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3317 for (i = 0; i < sglist->num_sg; i++)
3318 __free_pages(sg_page(&(sglist->scatterlist[i])),
3325 * pmcraid_alloc_sglist - Allocates memory for a SG list
3326 * @buflen: buffer length
3328 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3332 * pointer to sglist / NULL on failure
3334 static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3336 struct pmcraid_sglist *sglist;
3337 struct scatterlist *scatterlist;
3344 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3345 order = (sg_size > 0) ? get_order(sg_size) : 0;
3346 bsize_elem = PAGE_SIZE * (1 << order);
3348 /* Determine the actual number of sg entries needed */
3349 if (buflen % bsize_elem)
3350 num_elem = (buflen / bsize_elem) + 1;
3352 num_elem = buflen / bsize_elem;
3354 /* Allocate a scatter/gather list for the DMA */
3355 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3356 (sizeof(struct scatterlist) * (num_elem - 1)),
3362 scatterlist = sglist->scatterlist;
3363 sg_init_table(scatterlist, num_elem);
3364 sglist->order = order;
3365 sglist->num_sg = num_elem;
3368 for (i = 0; i < num_elem; i++) {
3369 page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
3371 for (j = i - 1; j >= 0; j--)
3372 __free_pages(sg_page(&scatterlist[j]), order);
3377 sg_set_page(&scatterlist[i], page,
3378 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3379 sg_size -= bsize_elem;
3386 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3387 * @sglist: scatter/gather list pointer
3388 * @buffer: buffer pointer
3389 * @len: buffer length
3390 * @direction: data transfer direction
3392 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3395 * 0 on success / other on failure
3397 static int pmcraid_copy_sglist(
3398 struct pmcraid_sglist *sglist,
3399 unsigned long buffer,
3404 struct scatterlist *scatterlist;
3410 /* Determine the actual number of bytes per element */
3411 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3413 scatterlist = sglist->scatterlist;
3415 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3416 struct page *page = sg_page(&scatterlist[i]);
3419 if (direction == DMA_TO_DEVICE)
3420 rc = __copy_from_user(kaddr,
3424 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3429 pmcraid_err("failed to copy user data into sg list\n");
3433 scatterlist[i].length = bsize_elem;
3436 if (len % bsize_elem) {
3437 struct page *page = sg_page(&scatterlist[i]);
3441 if (direction == DMA_TO_DEVICE)
3442 rc = __copy_from_user(kaddr,
3446 rc = __copy_to_user((void *)buffer,
3452 scatterlist[i].length = len % bsize_elem;
3456 pmcraid_err("failed to copy user data into sg list\n");
3464 * pmcraid_queuecommand - Queue a mid-layer request
3465 * @scsi_cmd: scsi command struct
3466 * @done: done function
3468 * This function queues a request generated by the mid-layer. Midlayer calls
3469 * this routine within host->lock. Some of the functions called by queuecommand
3470 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3474 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3475 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3477 static int pmcraid_queuecommand_lck(
3478 struct scsi_cmnd *scsi_cmd,
3479 void (*done) (struct scsi_cmnd *)
3482 struct pmcraid_instance *pinstance;
3483 struct pmcraid_resource_entry *res;
3484 struct pmcraid_ioarcb *ioarcb;
3485 struct pmcraid_cmd *cmd;
3490 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3491 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3492 scsi_cmd->scsi_done = done;
3493 res = scsi_cmd->device->hostdata;
3494 scsi_cmd->result = (DID_OK << 16);
3496 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3499 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3500 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3501 scsi_cmd->result = (DID_NO_CONNECT << 16);
3502 scsi_cmd->scsi_done(scsi_cmd);
3506 /* If IOA reset is in progress, can't queue the commands */
3507 if (pinstance->ioa_reset_in_progress)
3508 return SCSI_MLQUEUE_HOST_BUSY;
3510 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3511 * the command here itself with success return
3513 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3514 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3515 scsi_cmd->scsi_done(scsi_cmd);
3519 /* initialize the command and IOARCB to be sent to IOA */
3520 cmd = pmcraid_get_free_cmd(pinstance);
3523 pmcraid_err("free command block is not available\n");
3524 return SCSI_MLQUEUE_HOST_BUSY;
3527 cmd->scsi_cmd = scsi_cmd;
3528 ioarcb = &(cmd->ioa_cb->ioarcb);
3529 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3530 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3531 ioarcb->request_type = REQ_TYPE_SCSI;
3533 /* set hrrq number where the IOA should respond to. Note that all cmds
3534 * generated internally uses hrrq_id 0, exception to this is the cmd
3535 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3536 * hrrq_id assigned here in queuecommand
3538 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3539 pinstance->num_hrrq;
3540 cmd->cmd_done = pmcraid_io_done;
3542 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3543 if (scsi_cmd->underflow == 0)
3544 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3546 if (res->sync_reqd) {
3547 ioarcb->request_flags0 |= SYNC_COMPLETE;
3551 ioarcb->request_flags0 |= NO_LINK_DESCS;
3552 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3554 if (RES_IS_GSCSI(res->cfg_entry))
3555 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3558 rc = pmcraid_build_ioadl(pinstance, cmd);
3560 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3561 le32_to_cpu(ioarcb->response_handle) >> 2,
3562 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3563 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3564 PMCRAID_PHYS_BUS_ID,
3565 RES_IS_VSET(res->cfg_entry) ?
3566 (fw_version <= PMCRAID_FW_VERSION_1 ?
3567 res->cfg_entry.unique_flags1 :
3568 res->cfg_entry.array_id & 0xFF) :
3569 RES_TARGET(res->cfg_entry.resource_address),
3570 RES_LUN(res->cfg_entry.resource_address));
3572 if (likely(rc == 0)) {
3573 _pmcraid_fire_command(cmd);
3575 pmcraid_err("queuecommand could not build ioadl\n");
3576 pmcraid_return_cmd(cmd);
3577 rc = SCSI_MLQUEUE_HOST_BUSY;
3583 static DEF_SCSI_QCMD(pmcraid_queuecommand)
3586 * pmcraid_open -char node "open" entry, allowed only users with admin access
3588 static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3590 struct pmcraid_instance *pinstance;
3592 if (!capable(CAP_SYS_ADMIN))
3595 /* Populate adapter instance * pointer for use by ioctl */
3596 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3597 filep->private_data = pinstance;
3603 * pmcraid_fasync - Async notifier registration from applications
3605 * This function adds the calling process to a driver global queue. When an
3606 * event occurs, SIGIO will be sent to all processes in this queue.
3608 static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3610 struct pmcraid_instance *pinstance;
3613 pinstance = filep->private_data;
3614 mutex_lock(&pinstance->aen_queue_lock);
3615 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3616 mutex_unlock(&pinstance->aen_queue_lock);
3623 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3624 * commands sent over IOCTL interface
3626 * @cmd : pointer to struct pmcraid_cmd
3627 * @buflen : length of the request buffer
3628 * @direction : data transfer direction
3631 * 0 on success, non-zero error code on failure
3633 static int pmcraid_build_passthrough_ioadls(
3634 struct pmcraid_cmd *cmd,
3639 struct pmcraid_sglist *sglist = NULL;
3640 struct scatterlist *sg = NULL;
3641 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3642 struct pmcraid_ioadl_desc *ioadl;
3645 sglist = pmcraid_alloc_sglist(buflen);
3648 pmcraid_err("can't allocate memory for passthrough SGls\n");
3652 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3653 sglist->scatterlist,
3654 sglist->num_sg, direction);
3656 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3657 dev_err(&cmd->drv_inst->pdev->dev,
3658 "Failed to map passthrough buffer!\n");
3659 pmcraid_free_sglist(sglist);
3663 cmd->sglist = sglist;
3664 ioarcb->request_flags0 |= NO_LINK_DESCS;
3666 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3668 /* Initialize IOADL descriptor addresses */
3669 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3670 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3671 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3675 /* setup the last descriptor */
3676 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3683 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3685 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3686 * @buflen: size of the request buffer
3687 * @direction: data transfer direction
3690 * 0 on success, non-zero error code on failure
3692 static void pmcraid_release_passthrough_ioadls(
3693 struct pmcraid_cmd *cmd,
3698 struct pmcraid_sglist *sglist = cmd->sglist;
3701 pci_unmap_sg(cmd->drv_inst->pdev,
3702 sglist->scatterlist,
3705 pmcraid_free_sglist(sglist);
3711 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3713 * @pinstance: pointer to adapter instance structure
3715 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3718 * 0 on success, non-zero error code on failure
3720 static long pmcraid_ioctl_passthrough(
3721 struct pmcraid_instance *pinstance,
3722 unsigned int ioctl_cmd,
3723 unsigned int buflen,
3727 struct pmcraid_passthrough_ioctl_buffer *buffer;
3728 struct pmcraid_ioarcb *ioarcb;
3729 struct pmcraid_cmd *cmd;
3730 struct pmcraid_cmd *cancel_cmd;
3731 unsigned long request_buffer;
3732 unsigned long request_offset;
3733 unsigned long lock_flags;
3738 u8 access, direction;
3741 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3742 if (pinstance->ioa_reset_in_progress) {
3743 rc = wait_event_interruptible_timeout(
3744 pinstance->reset_wait_q,
3745 !pinstance->ioa_reset_in_progress,
3746 msecs_to_jiffies(10000));
3751 return -ERESTARTSYS;
3754 /* If adapter is not in operational state, return error */
3755 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3756 pmcraid_err("IOA is not operational\n");
3760 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3761 buffer = kmalloc(buffer_size, GFP_KERNEL);
3764 pmcraid_err("no memory for passthrough buffer\n");
3769 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3771 request_buffer = arg + request_offset;
3773 rc = __copy_from_user(buffer,
3774 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3775 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3779 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3782 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3784 goto out_free_buffer;
3787 request_size = buffer->ioarcb.data_transfer_length;
3789 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3790 access = VERIFY_READ;
3791 direction = DMA_TO_DEVICE;
3793 access = VERIFY_WRITE;
3794 direction = DMA_FROM_DEVICE;
3797 if (request_size > 0) {
3798 rc = access_ok(access, arg, request_offset + request_size);
3802 goto out_free_buffer;
3804 } else if (request_size < 0) {
3806 goto out_free_buffer;
3809 /* check if we have any additional command parameters */
3810 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3812 goto out_free_buffer;
3815 cmd = pmcraid_get_free_cmd(pinstance);
3818 pmcraid_err("free command block is not available\n");
3820 goto out_free_buffer;
3823 cmd->scsi_cmd = NULL;
3824 ioarcb = &(cmd->ioa_cb->ioarcb);
3826 /* Copy the user-provided IOARCB stuff field by field */
3827 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3828 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3829 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3830 ioarcb->request_type = buffer->ioarcb.request_type;
3831 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3832 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3833 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3835 if (buffer->ioarcb.add_cmd_param_length) {
3836 ioarcb->add_cmd_param_length =
3837 buffer->ioarcb.add_cmd_param_length;
3838 ioarcb->add_cmd_param_offset =
3839 buffer->ioarcb.add_cmd_param_offset;
3840 memcpy(ioarcb->add_data.u.add_cmd_params,
3841 buffer->ioarcb.add_data.u.add_cmd_params,
3842 buffer->ioarcb.add_cmd_param_length);
3845 /* set hrrq number where the IOA should respond to. Note that all cmds
3846 * generated internally uses hrrq_id 0, exception to this is the cmd
3847 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3848 * hrrq_id assigned here in queuecommand
3850 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3851 pinstance->num_hrrq;
3854 rc = pmcraid_build_passthrough_ioadls(cmd,
3858 pmcraid_err("couldn't build passthrough ioadls\n");
3859 goto out_free_buffer;
3861 } else if (request_size < 0) {
3863 goto out_free_buffer;
3866 /* If data is being written into the device, copy the data from user
3869 if (direction == DMA_TO_DEVICE && request_size > 0) {
3870 rc = pmcraid_copy_sglist(cmd->sglist,
3875 pmcraid_err("failed to copy user buffer\n");
3876 goto out_free_sglist;
3880 /* passthrough ioctl is a blocking command so, put the user to sleep
3881 * until timeout. Note that a timeout value of 0 means, do timeout.
3883 cmd->cmd_done = pmcraid_internal_done;
3884 init_completion(&cmd->wait_for_completion);
3885 cmd->completion_req = 1;
3887 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3888 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3889 cmd->ioa_cb->ioarcb.cdb[0],
3890 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3892 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3893 _pmcraid_fire_command(cmd);
3894 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3896 /* NOTE ! Remove the below line once abort_task is implemented
3897 * in firmware. This line disables ioctl command timeout handling logic
3898 * similar to IO command timeout handling, making ioctl commands to wait
3899 * until the command completion regardless of timeout value specified in
3902 buffer->ioarcb.cmd_timeout = 0;
3904 /* If command timeout is specified put caller to wait till that time,
3905 * otherwise it would be blocking wait. If command gets timed out, it
3908 if (buffer->ioarcb.cmd_timeout == 0) {
3909 wait_for_completion(&cmd->wait_for_completion);
3910 } else if (!wait_for_completion_timeout(
3911 &cmd->wait_for_completion,
3912 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3914 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3915 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3916 cmd->ioa_cb->ioarcb.cdb[0]);
3918 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3919 cancel_cmd = pmcraid_abort_cmd(cmd);
3920 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3923 wait_for_completion(&cancel_cmd->wait_for_completion);
3924 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
3925 pmcraid_return_cmd(cancel_cmd);
3927 /* if abort task couldn't find the command i.e it got
3928 * completed prior to aborting, return good completion.
3929 * if command got aborted successfully or there was IOA
3930 * reset due to abort task itself getting timedout then
3933 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3934 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3935 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3937 goto out_handle_response;
3941 /* no command block for abort task or abort task failed to abort
3942 * the IOARCB, then wait for 150 more seconds and initiate reset
3943 * sequence after timeout
3945 if (!wait_for_completion_timeout(
3946 &cmd->wait_for_completion,
3947 msecs_to_jiffies(150 * 1000))) {
3948 pmcraid_reset_bringup(cmd->drv_inst);
3953 out_handle_response:
3954 /* copy entire IOASA buffer and return IOCTL success.
3955 * If copying IOASA to user-buffer fails, return
3958 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3959 sizeof(struct pmcraid_ioasa))) {
3960 pmcraid_err("failed to copy ioasa buffer to user\n");
3964 /* If the data transfer was from device, copy the data onto user
3967 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3968 rc = pmcraid_copy_sglist(cmd->sglist,
3973 pmcraid_err("failed to copy user buffer\n");
3979 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3980 pmcraid_return_cmd(cmd);
3992 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3994 * @pinstance: pointer to adapter instance structure
3995 * @cmd: ioctl command passed in
3996 * @buflen: length of user_buffer
3997 * @user_buffer: user buffer pointer
4000 * 0 in case of success, otherwise appropriate error code
4002 static long pmcraid_ioctl_driver(
4003 struct pmcraid_instance *pinstance,
4005 unsigned int buflen,
4006 void __user *user_buffer
4011 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
4012 pmcraid_err("ioctl_driver: access fault in request buffer\n");
4017 case PMCRAID_IOCTL_RESET_ADAPTER:
4018 pmcraid_reset_bringup(pinstance);
4030 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4032 * @cmd: ioctl command
4034 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4037 * negetive error code if there are access issues, otherwise zero.
4038 * Upon success, returns ioctl header copied out of user buffer.
4041 static int pmcraid_check_ioctl_buffer(
4044 struct pmcraid_ioctl_header *hdr
4048 int access = VERIFY_READ;
4050 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4051 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4055 /* check for valid driver signature */
4056 rc = memcmp(hdr->signature,
4057 PMCRAID_IOCTL_SIGNATURE,
4058 sizeof(hdr->signature));
4060 pmcraid_err("signature verification failed\n");
4064 /* check for appropriate buffer access */
4065 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4066 access = VERIFY_WRITE;
4068 rc = access_ok(access,
4069 (arg + sizeof(struct pmcraid_ioctl_header)),
4070 hdr->buffer_length);
4072 pmcraid_err("access failed for user buffer of size %d\n",
4073 hdr->buffer_length);
4081 * pmcraid_ioctl - char node ioctl entry point
4083 static long pmcraid_chr_ioctl(
4089 struct pmcraid_instance *pinstance = NULL;
4090 struct pmcraid_ioctl_header *hdr = NULL;
4091 int retval = -ENOTTY;
4093 hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL);
4096 pmcraid_err("failed to allocate memory for ioctl header\n");
4100 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4103 pmcraid_info("chr_ioctl: header check failed\n");
4108 pinstance = filep->private_data;
4111 pmcraid_info("adapter instance is not found\n");
4116 switch (_IOC_TYPE(cmd)) {
4118 case PMCRAID_PASSTHROUGH_IOCTL:
4119 /* If ioctl code is to download microcode, we need to block
4120 * mid-layer requests.
4122 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4123 scsi_block_requests(pinstance->host);
4125 retval = pmcraid_ioctl_passthrough(pinstance,
4130 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4131 scsi_unblock_requests(pinstance->host);
4134 case PMCRAID_DRIVER_IOCTL:
4135 arg += sizeof(struct pmcraid_ioctl_header);
4136 retval = pmcraid_ioctl_driver(pinstance,
4139 (void __user *)arg);
4153 * File operations structure for management interface
4155 static const struct file_operations pmcraid_fops = {
4156 .owner = THIS_MODULE,
4157 .open = pmcraid_chr_open,
4158 .fasync = pmcraid_chr_fasync,
4159 .unlocked_ioctl = pmcraid_chr_ioctl,
4160 #ifdef CONFIG_COMPAT
4161 .compat_ioctl = pmcraid_chr_ioctl,
4163 .llseek = noop_llseek,
4170 * pmcraid_show_log_level - Display adapter's error logging level
4171 * @dev: class device struct
4175 * number of bytes printed to buffer
4177 static ssize_t pmcraid_show_log_level(
4179 struct device_attribute *attr,
4182 struct Scsi_Host *shost = class_to_shost(dev);
4183 struct pmcraid_instance *pinstance =
4184 (struct pmcraid_instance *)shost->hostdata;
4185 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4189 * pmcraid_store_log_level - Change the adapter's error logging level
4190 * @dev: class device struct
4195 * number of bytes printed to buffer
4197 static ssize_t pmcraid_store_log_level(
4199 struct device_attribute *attr,
4204 struct Scsi_Host *shost;
4205 struct pmcraid_instance *pinstance;
4208 if (strict_strtoul(buf, 10, &val))
4210 /* log-level should be from 0 to 2 */
4214 shost = class_to_shost(dev);
4215 pinstance = (struct pmcraid_instance *)shost->hostdata;
4216 pinstance->current_log_level = val;
4221 static struct device_attribute pmcraid_log_level_attr = {
4223 .name = "log_level",
4224 .mode = S_IRUGO | S_IWUSR,
4226 .show = pmcraid_show_log_level,
4227 .store = pmcraid_store_log_level,
4231 * pmcraid_show_drv_version - Display driver version
4232 * @dev: class device struct
4236 * number of bytes printed to buffer
4238 static ssize_t pmcraid_show_drv_version(
4240 struct device_attribute *attr,
4244 return snprintf(buf, PAGE_SIZE, "version: %s\n",
4245 PMCRAID_DRIVER_VERSION);
4248 static struct device_attribute pmcraid_driver_version_attr = {
4250 .name = "drv_version",
4253 .show = pmcraid_show_drv_version,
4257 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4258 * @dev: class device struct
4262 * number of bytes printed to buffer
4264 static ssize_t pmcraid_show_adapter_id(
4266 struct device_attribute *attr,
4270 struct Scsi_Host *shost = class_to_shost(dev);
4271 struct pmcraid_instance *pinstance =
4272 (struct pmcraid_instance *)shost->hostdata;
4273 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4274 pinstance->pdev->devfn;
4275 u32 aen_group = pmcraid_event_family.id;
4277 return snprintf(buf, PAGE_SIZE,
4278 "adapter id: %d\nminor: %d\naen group: %d\n",
4279 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4282 static struct device_attribute pmcraid_adapter_id_attr = {
4284 .name = "adapter_id",
4285 .mode = S_IRUGO | S_IWUSR,
4287 .show = pmcraid_show_adapter_id,
4290 static struct device_attribute *pmcraid_host_attrs[] = {
4291 &pmcraid_log_level_attr,
4292 &pmcraid_driver_version_attr,
4293 &pmcraid_adapter_id_attr,
4298 /* host template structure for pmcraid driver */
4299 static struct scsi_host_template pmcraid_host_template = {
4300 .module = THIS_MODULE,
4301 .name = PMCRAID_DRIVER_NAME,
4302 .queuecommand = pmcraid_queuecommand,
4303 .eh_abort_handler = pmcraid_eh_abort_handler,
4304 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4305 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4306 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4307 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4309 .slave_alloc = pmcraid_slave_alloc,
4310 .slave_configure = pmcraid_slave_configure,
4311 .slave_destroy = pmcraid_slave_destroy,
4312 .change_queue_depth = pmcraid_change_queue_depth,
4313 .change_queue_type = pmcraid_change_queue_type,
4314 .can_queue = PMCRAID_MAX_IO_CMD,
4316 .sg_tablesize = PMCRAID_MAX_IOADLS,
4317 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4318 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4319 .use_clustering = ENABLE_CLUSTERING,
4320 .shost_attrs = pmcraid_host_attrs,
4321 .proc_name = PMCRAID_DRIVER_NAME
4325 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4326 * @irq: interrupt vector number
4327 * @dev_id: pointer hrrq_vector
4330 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4333 static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
4335 struct pmcraid_isr_param *hrrq_vector;
4336 struct pmcraid_instance *pinstance;
4337 unsigned long lock_flags;
4341 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4342 hrrq_id = hrrq_vector->hrrq_id;
4343 pinstance = hrrq_vector->drv_inst;
4346 /* Read the interrupt */
4347 intrs_val = pmcraid_read_interrupts(pinstance);
4349 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4350 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4351 /* Any error interrupts including unit_check,
4352 * initiate IOA reset.In case of unit check indicate
4353 * to reset_sequence that IOA unit checked and prepare
4354 * for a dump during reset sequence
4356 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4357 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4358 pinstance->ioa_unit_check = 1;
4360 pmcraid_err("ISR: error interrupts: %x \
4361 initiating reset\n", intrs_val);
4362 spin_lock_irqsave(pinstance->host->host_lock,
4364 pmcraid_initiate_reset(pinstance);
4365 spin_unlock_irqrestore(
4366 pinstance->host->host_lock,
4369 /* If interrupt was as part of the ioa initialization,
4370 * clear it. Delete the timer and wakeup the
4371 * reset engine to proceed with reset sequence
4373 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4374 pmcraid_clr_trans_op(pinstance);
4376 /* Clear the interrupt register by writing
4377 * to host to ioa doorbell. Once done
4378 * FW will clear the interrupt.
4380 iowrite32(DOORBELL_INTR_MSIX_CLR,
4381 pinstance->int_regs.host_ioa_interrupt_reg);
4382 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4388 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4394 * pmcraid_isr - implements legacy interrupt handling routine
4396 * @irq: interrupt vector number
4397 * @dev_id: pointer hrrq_vector
4400 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4402 static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4404 struct pmcraid_isr_param *hrrq_vector;
4405 struct pmcraid_instance *pinstance;
4407 unsigned long lock_flags;
4410 /* In case of legacy interrupt mode where interrupts are shared across
4411 * isrs, it may be possible that the current interrupt is not from IOA
4414 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4417 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4418 pinstance = hrrq_vector->drv_inst;
4420 intrs = pmcraid_read_interrupts(pinstance);
4422 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
4425 /* Any error interrupts including unit_check, initiate IOA reset.
4426 * In case of unit check indicate to reset_sequence that IOA unit
4427 * checked and prepare for a dump during reset sequence
4429 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4431 if (intrs & INTRS_IOA_UNIT_CHECK)
4432 pinstance->ioa_unit_check = 1;
4435 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4436 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4439 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4440 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
4441 pmcraid_initiate_reset(pinstance);
4442 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
4444 /* If interrupt was as part of the ioa initialization,
4445 * clear. Delete the timer and wakeup the
4446 * reset engine to proceed with reset sequence
4448 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4449 pmcraid_clr_trans_op(pinstance);
4452 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4454 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4457 &(pinstance->isr_tasklet[hrrq_id]));
4466 * pmcraid_worker_function - worker thread function
4468 * @workp: pointer to struct work queue
4474 static void pmcraid_worker_function(struct work_struct *workp)
4476 struct pmcraid_instance *pinstance;
4477 struct pmcraid_resource_entry *res;
4478 struct pmcraid_resource_entry *temp;
4479 struct scsi_device *sdev;
4480 unsigned long lock_flags;
4481 unsigned long host_lock_flags;
4483 u8 bus, target, lun;
4485 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4486 /* add resources only after host is added into system */
4487 if (!atomic_read(&pinstance->expose_resources))
4490 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4492 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4493 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4495 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4496 sdev = res->scsi_dev;
4498 /* host_lock must be held before calling
4501 spin_lock_irqsave(pinstance->host->host_lock,
4503 if (!scsi_device_get(sdev)) {
4504 spin_unlock_irqrestore(
4505 pinstance->host->host_lock,
4507 pmcraid_info("deleting %x from midlayer\n",
4508 res->cfg_entry.resource_address);
4509 list_move_tail(&res->queue,
4510 &pinstance->free_res_q);
4511 spin_unlock_irqrestore(
4512 &pinstance->resource_lock,
4514 scsi_remove_device(sdev);
4515 scsi_device_put(sdev);
4516 spin_lock_irqsave(&pinstance->resource_lock,
4518 res->change_detected = 0;
4520 spin_unlock_irqrestore(
4521 pinstance->host->host_lock,
4527 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4529 if (res->change_detected == RES_CHANGE_ADD) {
4531 if (!pmcraid_expose_resource(fw_version,
4535 if (RES_IS_VSET(res->cfg_entry)) {
4536 bus = PMCRAID_VSET_BUS_ID;
4537 if (fw_version <= PMCRAID_FW_VERSION_1)
4538 target = res->cfg_entry.unique_flags1;
4540 target = res->cfg_entry.array_id & 0xFF;
4541 lun = PMCRAID_VSET_LUN_ID;
4543 bus = PMCRAID_PHYS_BUS_ID;
4546 res->cfg_entry.resource_address);
4547 lun = RES_LUN(res->cfg_entry.resource_address);
4550 res->change_detected = 0;
4551 spin_unlock_irqrestore(&pinstance->resource_lock,
4553 scsi_add_device(pinstance->host, bus, target, lun);
4554 spin_lock_irqsave(&pinstance->resource_lock,
4559 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4563 * pmcraid_tasklet_function - Tasklet function
4565 * @instance: pointer to msix param structure
4570 static void pmcraid_tasklet_function(unsigned long instance)
4572 struct pmcraid_isr_param *hrrq_vector;
4573 struct pmcraid_instance *pinstance;
4574 unsigned long hrrq_lock_flags;
4575 unsigned long pending_lock_flags;
4576 unsigned long host_lock_flags;
4577 spinlock_t *lockp; /* hrrq buffer lock */
4581 hrrq_vector = (struct pmcraid_isr_param *)instance;
4582 pinstance = hrrq_vector->drv_inst;
4583 id = hrrq_vector->hrrq_id;
4584 lockp = &(pinstance->hrrq_lock[id]);
4586 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4587 * protected by its own lock. Traversals must be done within this lock
4588 * as there may be multiple tasklets running on multiple CPUs. Note
4589 * that the lock is held just for picking up the response handle and
4590 * manipulating hrrq_curr/toggle_bit values.
4592 spin_lock_irqsave(lockp, hrrq_lock_flags);
4594 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4596 while ((resp & HRRQ_TOGGLE_BIT) ==
4597 pinstance->host_toggle_bit[id]) {
4599 int cmd_index = resp >> 2;
4600 struct pmcraid_cmd *cmd = NULL;
4602 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4603 pinstance->hrrq_curr[id]++;
4605 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4606 pinstance->host_toggle_bit[id] ^= 1u;
4609 if (cmd_index >= PMCRAID_MAX_CMD) {
4610 /* In case of invalid response handle, log message */
4611 pmcraid_err("Invalid response handle %d\n", cmd_index);
4612 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4616 cmd = pinstance->cmd_list[cmd_index];
4617 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4619 spin_lock_irqsave(&pinstance->pending_pool_lock,
4620 pending_lock_flags);
4621 list_del(&cmd->free_list);
4622 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4623 pending_lock_flags);
4624 del_timer(&cmd->timer);
4625 atomic_dec(&pinstance->outstanding_cmds);
4627 if (cmd->cmd_done == pmcraid_ioa_reset) {
4628 spin_lock_irqsave(pinstance->host->host_lock,
4631 spin_unlock_irqrestore(pinstance->host->host_lock,
4633 } else if (cmd->cmd_done != NULL) {
4636 /* loop over until we are done with all responses */
4637 spin_lock_irqsave(lockp, hrrq_lock_flags);
4638 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4641 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4645 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4646 * @pinstance: pointer to adapter instance structure
4648 * This routine un-registers registered interrupt handler and
4649 * also frees irqs/vectors.
4655 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4659 for (i = 0; i < pinstance->num_hrrq; i++)
4660 free_irq(pinstance->hrrq_vector[i].vector,
4661 &(pinstance->hrrq_vector[i]));
4663 if (pinstance->interrupt_mode) {
4664 pci_disable_msix(pinstance->pdev);
4665 pinstance->interrupt_mode = 0;
4670 * pmcraid_register_interrupt_handler - registers interrupt handler
4671 * @pinstance: pointer to per-adapter instance structure
4674 * 0 on success, non-zero error code otherwise.
4677 pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4680 struct pci_dev *pdev = pinstance->pdev;
4682 if ((pmcraid_enable_msix) &&
4683 (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
4684 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4685 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4687 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4688 entries[i].entry = i;
4690 rc = pci_enable_msix(pdev, entries, num_hrrq);
4692 goto pmcraid_isr_legacy;
4694 /* Check how many MSIX vectors are allocated and register
4695 * msi-x handlers for each of them giving appropriate buffer
4699 if (pci_enable_msix(pdev, entries, num_hrrq))
4700 goto pmcraid_isr_legacy;
4703 for (i = 0; i < num_hrrq; i++) {
4704 pinstance->hrrq_vector[i].hrrq_id = i;
4705 pinstance->hrrq_vector[i].drv_inst = pinstance;
4706 pinstance->hrrq_vector[i].vector = entries[i].vector;
4707 rc = request_irq(pinstance->hrrq_vector[i].vector,
4708 pmcraid_isr_msix, 0,
4709 PMCRAID_DRIVER_NAME,
4710 &(pinstance->hrrq_vector[i]));
4714 for (j = 0; j < i; j++)
4715 free_irq(entries[j].vector,
4716 &(pinstance->hrrq_vector[j]));
4717 pci_disable_msix(pdev);
4718 goto pmcraid_isr_legacy;
4722 pinstance->num_hrrq = num_hrrq;
4723 pinstance->interrupt_mode = 1;
4724 iowrite32(DOORBELL_INTR_MODE_MSIX,
4725 pinstance->int_regs.host_ioa_interrupt_reg);
4726 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4727 goto pmcraid_isr_out;
4731 /* If MSI-X registration failed fallback to legacy mode, where
4732 * only one hrrq entry will be used
4734 pinstance->hrrq_vector[0].hrrq_id = 0;
4735 pinstance->hrrq_vector[0].drv_inst = pinstance;
4736 pinstance->hrrq_vector[0].vector = pdev->irq;
4737 pinstance->num_hrrq = 1;
4740 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4741 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4747 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4748 * @pinstance: per adapter instance structure pointer
4749 * @max_index: number of buffer blocks to release
4755 pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4758 for (i = 0; i < max_index; i++) {
4759 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4760 pinstance->cmd_list[i] = NULL;
4762 kmem_cache_destroy(pinstance->cmd_cachep);
4763 pinstance->cmd_cachep = NULL;
4767 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4768 * @pinstance: pointer to per adapter instance structure
4769 * @max_index: number of buffers (from 0 onwards) to release
4771 * This function assumes that the command blocks for which control blocks are
4772 * linked are not released.
4778 pmcraid_release_control_blocks(
4779 struct pmcraid_instance *pinstance,
4785 if (pinstance->control_pool == NULL)
4788 for (i = 0; i < max_index; i++) {
4789 pci_pool_free(pinstance->control_pool,
4790 pinstance->cmd_list[i]->ioa_cb,
4791 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4792 pinstance->cmd_list[i]->ioa_cb = NULL;
4793 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4795 pci_pool_destroy(pinstance->control_pool);
4796 pinstance->control_pool = NULL;
4800 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4801 * @pinstance - pointer to per adapter instance structure
4803 * Allocates memory for command blocks using kernel slab allocator.
4806 * 0 in case of success; -ENOMEM in case of failure
4808 static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4812 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4813 pinstance->host->unique_id);
4816 pinstance->cmd_cachep = kmem_cache_create(
4817 pinstance->cmd_pool_name,
4818 sizeof(struct pmcraid_cmd), 0,
4819 SLAB_HWCACHE_ALIGN, NULL);
4820 if (!pinstance->cmd_cachep)
4823 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4824 pinstance->cmd_list[i] =
4825 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4826 if (!pinstance->cmd_list[i]) {
4827 pmcraid_release_cmd_blocks(pinstance, i);
4835 * pmcraid_allocate_control_blocks - allocates memory control blocks
4836 * @pinstance : pointer to per adapter instance structure
4838 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4839 * and IOASAs. This is called after command blocks are already allocated.
4842 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4844 static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4848 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4849 pinstance->host->unique_id);
4851 pinstance->control_pool =
4852 pci_pool_create(pinstance->ctl_pool_name,
4854 sizeof(struct pmcraid_control_block),
4855 PMCRAID_IOARCB_ALIGNMENT, 0);
4857 if (!pinstance->control_pool)
4860 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4861 pinstance->cmd_list[i]->ioa_cb =
4863 pinstance->control_pool,
4865 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4867 if (!pinstance->cmd_list[i]->ioa_cb) {
4868 pmcraid_release_control_blocks(pinstance, i);
4871 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4872 sizeof(struct pmcraid_control_block));
4878 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4879 * @pinstance: pointer to per adapter instance structure
4880 * @maxindex: size of hrrq buffer pointer array
4886 pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4889 for (i = 0; i < maxindex; i++) {
4891 pci_free_consistent(pinstance->pdev,
4892 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4893 pinstance->hrrq_start[i],
4894 pinstance->hrrq_start_bus_addr[i]);
4896 /* reset pointers and toggle bit to zeros */
4897 pinstance->hrrq_start[i] = NULL;
4898 pinstance->hrrq_start_bus_addr[i] = 0;
4899 pinstance->host_toggle_bit[i] = 0;
4904 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4905 * @pinstance: pointer to per adapter instance structure
4908 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4910 static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4914 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4916 for (i = 0; i < pinstance->num_hrrq; i++) {
4917 pinstance->hrrq_start[i] =
4918 pci_alloc_consistent(
4921 &(pinstance->hrrq_start_bus_addr[i]));
4923 if (pinstance->hrrq_start[i] == 0) {
4924 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4926 pmcraid_release_host_rrqs(pinstance, i);
4930 memset(pinstance->hrrq_start[i], 0, buffer_size);
4931 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4932 pinstance->hrrq_end[i] =
4933 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4934 pinstance->host_toggle_bit[i] = 1;
4935 spin_lock_init(&pinstance->hrrq_lock[i]);
4941 * pmcraid_release_hcams - release HCAM buffers
4943 * @pinstance: pointer to per adapter instance structure
4948 static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4950 if (pinstance->ccn.msg != NULL) {
4951 pci_free_consistent(pinstance->pdev,
4952 PMCRAID_AEN_HDR_SIZE +
4953 sizeof(struct pmcraid_hcam_ccn_ext),
4955 pinstance->ccn.baddr);
4957 pinstance->ccn.msg = NULL;
4958 pinstance->ccn.hcam = NULL;
4959 pinstance->ccn.baddr = 0;
4962 if (pinstance->ldn.msg != NULL) {
4963 pci_free_consistent(pinstance->pdev,
4964 PMCRAID_AEN_HDR_SIZE +
4965 sizeof(struct pmcraid_hcam_ldn),
4967 pinstance->ldn.baddr);
4969 pinstance->ldn.msg = NULL;
4970 pinstance->ldn.hcam = NULL;
4971 pinstance->ldn.baddr = 0;
4976 * pmcraid_allocate_hcams - allocates HCAM buffers
4977 * @pinstance : pointer to per adapter instance structure
4980 * 0 in case of successful allocation, non-zero otherwise
4982 static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4984 pinstance->ccn.msg = pci_alloc_consistent(
4986 PMCRAID_AEN_HDR_SIZE +
4987 sizeof(struct pmcraid_hcam_ccn_ext),
4988 &(pinstance->ccn.baddr));
4990 pinstance->ldn.msg = pci_alloc_consistent(
4992 PMCRAID_AEN_HDR_SIZE +
4993 sizeof(struct pmcraid_hcam_ldn),
4994 &(pinstance->ldn.baddr));
4996 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
4997 pmcraid_release_hcams(pinstance);
4999 pinstance->ccn.hcam =
5000 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5001 pinstance->ldn.hcam =
5002 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5004 atomic_set(&pinstance->ccn.ignore, 0);
5005 atomic_set(&pinstance->ldn.ignore, 0);
5008 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5012 * pmcraid_release_config_buffers - release config.table buffers
5013 * @pinstance: pointer to per adapter instance structure
5018 static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5020 if (pinstance->cfg_table != NULL &&
5021 pinstance->cfg_table_bus_addr != 0) {
5022 pci_free_consistent(pinstance->pdev,
5023 sizeof(struct pmcraid_config_table),
5024 pinstance->cfg_table,
5025 pinstance->cfg_table_bus_addr);
5026 pinstance->cfg_table = NULL;
5027 pinstance->cfg_table_bus_addr = 0;
5030 if (pinstance->res_entries != NULL) {
5033 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5034 list_del(&pinstance->res_entries[i].queue);
5035 kfree(pinstance->res_entries);
5036 pinstance->res_entries = NULL;
5039 pmcraid_release_hcams(pinstance);
5043 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5044 * @pinstance : pointer to per adapter instance structure
5047 * 0 for successful allocation, -ENOMEM for any failure
5049 static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
5053 pinstance->res_entries =
5054 kzalloc(sizeof(struct pmcraid_resource_entry) *
5055 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5057 if (NULL == pinstance->res_entries) {
5058 pmcraid_err("failed to allocate memory for resource table\n");
5062 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5063 list_add_tail(&pinstance->res_entries[i].queue,
5064 &pinstance->free_res_q);
5066 pinstance->cfg_table =
5067 pci_alloc_consistent(pinstance->pdev,
5068 sizeof(struct pmcraid_config_table),
5069 &pinstance->cfg_table_bus_addr);
5071 if (NULL == pinstance->cfg_table) {
5072 pmcraid_err("couldn't alloc DMA memory for config table\n");
5073 pmcraid_release_config_buffers(pinstance);
5077 if (pmcraid_allocate_hcams(pinstance)) {
5078 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5079 pmcraid_release_config_buffers(pinstance);
5087 * pmcraid_init_tasklets - registers tasklets for response handling
5089 * @pinstance: pointer adapter instance structure
5094 static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5097 for (i = 0; i < pinstance->num_hrrq; i++)
5098 tasklet_init(&pinstance->isr_tasklet[i],
5099 pmcraid_tasklet_function,
5100 (unsigned long)&pinstance->hrrq_vector[i]);
5104 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5106 * @pinstance: pointer to adapter instance structure
5111 static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5114 for (i = 0; i < pinstance->num_hrrq; i++)
5115 tasklet_kill(&pinstance->isr_tasklet[i]);
5119 * pmcraid_release_buffers - release per-adapter buffers allocated
5121 * @pinstance: pointer to adapter soft state
5126 static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5128 pmcraid_release_config_buffers(pinstance);
5129 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5130 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5131 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5133 if (pinstance->inq_data != NULL) {
5134 pci_free_consistent(pinstance->pdev,
5135 sizeof(struct pmcraid_inquiry_data),
5136 pinstance->inq_data,
5137 pinstance->inq_data_baddr);
5139 pinstance->inq_data = NULL;
5140 pinstance->inq_data_baddr = 0;
5143 if (pinstance->timestamp_data != NULL) {
5144 pci_free_consistent(pinstance->pdev,
5145 sizeof(struct pmcraid_timestamp_data),
5146 pinstance->timestamp_data,
5147 pinstance->timestamp_data_baddr);
5149 pinstance->timestamp_data = NULL;
5150 pinstance->timestamp_data_baddr = 0;
5155 * pmcraid_init_buffers - allocates memory and initializes various structures
5156 * @pinstance: pointer to per adapter instance structure
5158 * This routine pre-allocates memory based on the type of block as below:
5159 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5160 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5161 * config-table entries : DMAable memory using pci_alloc_consistent
5162 * HostRRQs : DMAable memory, using pci_alloc_consistent
5165 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5167 static int pmcraid_init_buffers(struct pmcraid_instance *pinstance)
5171 if (pmcraid_allocate_host_rrqs(pinstance)) {
5172 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5173 pinstance->num_hrrq);
5177 if (pmcraid_allocate_config_buffers(pinstance)) {
5178 pmcraid_err("couldn't allocate memory for config buffers\n");
5179 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5183 if (pmcraid_allocate_cmd_blocks(pinstance)) {
5184 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5185 pmcraid_release_config_buffers(pinstance);
5186 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5190 if (pmcraid_allocate_control_blocks(pinstance)) {
5191 pmcraid_err("couldn't allocate memory control blocks\n");
5192 pmcraid_release_config_buffers(pinstance);
5193 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5194 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5198 /* allocate DMAable memory for page D0 INQUIRY buffer */
5199 pinstance->inq_data = pci_alloc_consistent(
5201 sizeof(struct pmcraid_inquiry_data),
5202 &pinstance->inq_data_baddr);
5204 if (pinstance->inq_data == NULL) {
5205 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5206 pmcraid_release_buffers(pinstance);
5210 /* allocate DMAable memory for set timestamp data buffer */
5211 pinstance->timestamp_data = pci_alloc_consistent(
5213 sizeof(struct pmcraid_timestamp_data),
5214 &pinstance->timestamp_data_baddr);
5216 if (pinstance->timestamp_data == NULL) {
5217 pmcraid_err("couldn't allocate DMA memory for \
5218 set time_stamp \n");
5219 pmcraid_release_buffers(pinstance);
5224 /* Initialize all the command blocks and add them to free pool. No
5225 * need to lock (free_pool_lock) as this is done in initialization
5228 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5229 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5230 pmcraid_init_cmdblk(cmdp, i);
5231 cmdp->drv_inst = pinstance;
5232 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5239 * pmcraid_reinit_buffers - resets various buffer pointers
5240 * @pinstance: pointer to adapter instance
5244 static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5247 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5249 for (i = 0; i < pinstance->num_hrrq; i++) {
5250 memset(pinstance->hrrq_start[i], 0, buffer_size);
5251 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5252 pinstance->hrrq_end[i] =
5253 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5254 pinstance->host_toggle_bit[i] = 1;
5259 * pmcraid_init_instance - initialize per instance data structure
5260 * @pdev: pointer to pci device structure
5261 * @host: pointer to Scsi_Host structure
5262 * @mapped_pci_addr: memory mapped IOA configuration registers
5265 * 0 on success, non-zero in case of any failure
5267 static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host,
5268 void __iomem *mapped_pci_addr)
5270 struct pmcraid_instance *pinstance =
5271 (struct pmcraid_instance *)host->hostdata;
5273 pinstance->host = host;
5274 pinstance->pdev = pdev;
5276 /* Initialize register addresses */
5277 pinstance->mapped_dma_addr = mapped_pci_addr;
5279 /* Initialize chip-specific details */
5281 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5282 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5284 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5286 pint_regs->ioa_host_interrupt_reg =
5287 mapped_pci_addr + chip_cfg->ioa_host_intr;
5288 pint_regs->ioa_host_interrupt_clr_reg =
5289 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
5290 pint_regs->ioa_host_msix_interrupt_reg =
5291 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
5292 pint_regs->host_ioa_interrupt_reg =
5293 mapped_pci_addr + chip_cfg->host_ioa_intr;
5294 pint_regs->host_ioa_interrupt_clr_reg =
5295 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5297 /* Current version of firmware exposes interrupt mask set
5298 * and mask clr registers through memory mapped bar0.
5300 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5301 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5302 pint_regs->ioa_host_interrupt_mask_reg =
5303 mapped_pci_addr + chip_cfg->ioa_host_mask;
5304 pint_regs->ioa_host_interrupt_mask_clr_reg =
5305 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5306 pint_regs->global_interrupt_mask_reg =
5307 mapped_pci_addr + chip_cfg->global_intr_mask;
5310 pinstance->ioa_reset_attempts = 0;
5311 init_waitqueue_head(&pinstance->reset_wait_q);
5313 atomic_set(&pinstance->outstanding_cmds, 0);
5314 atomic_set(&pinstance->last_message_id, 0);
5315 atomic_set(&pinstance->expose_resources, 0);
5317 INIT_LIST_HEAD(&pinstance->free_res_q);
5318 INIT_LIST_HEAD(&pinstance->used_res_q);
5319 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5320 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5322 spin_lock_init(&pinstance->free_pool_lock);
5323 spin_lock_init(&pinstance->pending_pool_lock);
5324 spin_lock_init(&pinstance->resource_lock);
5325 mutex_init(&pinstance->aen_queue_lock);
5327 /* Work-queue (Shared) for deferred processing error handling */
5328 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5330 /* Initialize the default log_level */
5331 pinstance->current_log_level = pmcraid_log_level;
5333 /* Setup variables required for reset engine */
5334 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5335 pinstance->reset_cmd = NULL;
5340 * pmcraid_shutdown - shutdown adapter controller.
5341 * @pdev: pci device struct
5343 * Issues an adapter shutdown to the card waits for its completion
5348 static void pmcraid_shutdown(struct pci_dev *pdev)
5350 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5351 pmcraid_reset_bringdown(pinstance);
5356 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5358 static unsigned short pmcraid_get_minor(void)
5362 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5363 __set_bit(minor, pmcraid_minor);
5368 * pmcraid_release_minor - releases given minor back to minor number bitmap
5370 static void pmcraid_release_minor(unsigned short minor)
5372 __clear_bit(minor, pmcraid_minor);
5376 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5378 * @pinstance: pointer to adapter instance for which to register device
5381 * 0 in case of success, otherwise non-zero
5383 static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5388 minor = pmcraid_get_minor();
5389 cdev_init(&pinstance->cdev, &pmcraid_fops);
5390 pinstance->cdev.owner = THIS_MODULE;
5392 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5395 pmcraid_release_minor(minor);
5397 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
5398 NULL, "%s%u", PMCRAID_DEVFILE, minor);
5403 * pmcraid_release_chrdev - unregisters per-adapter management interface
5405 * @pinstance: pointer to adapter instance structure
5410 static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5412 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5413 device_destroy(pmcraid_class,
5414 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5415 cdev_del(&pinstance->cdev);
5419 * pmcraid_remove - IOA hot plug remove entry point
5420 * @pdev: pci device struct
5425 static void pmcraid_remove(struct pci_dev *pdev)
5427 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5429 /* remove the management interface (/dev file) for this device */
5430 pmcraid_release_chrdev(pinstance);
5432 /* remove host template from scsi midlayer */
5433 scsi_remove_host(pinstance->host);
5435 /* block requests from mid-layer */
5436 scsi_block_requests(pinstance->host);
5438 /* initiate shutdown adapter */
5439 pmcraid_shutdown(pdev);
5441 pmcraid_disable_interrupts(pinstance, ~0);
5442 flush_work(&pinstance->worker_q);
5444 pmcraid_kill_tasklets(pinstance);
5445 pmcraid_unregister_interrupt_handler(pinstance);
5446 pmcraid_release_buffers(pinstance);
5447 iounmap(pinstance->mapped_dma_addr);
5448 pci_release_regions(pdev);
5449 scsi_host_put(pinstance->host);
5450 pci_disable_device(pdev);
5457 * pmcraid_suspend - driver suspend entry point for power management
5458 * @pdev: PCI device structure
5459 * @state: PCI power state to suspend routine
5461 * Return Value - 0 always
5463 static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5465 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5467 pmcraid_shutdown(pdev);
5468 pmcraid_disable_interrupts(pinstance, ~0);
5469 pmcraid_kill_tasklets(pinstance);
5470 pci_set_drvdata(pinstance->pdev, pinstance);
5471 pmcraid_unregister_interrupt_handler(pinstance);
5472 pci_save_state(pdev);
5473 pci_disable_device(pdev);
5474 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5480 * pmcraid_resume - driver resume entry point PCI power management
5481 * @pdev: PCI device structure
5483 * Return Value - 0 in case of success. Error code in case of any failure
5485 static int pmcraid_resume(struct pci_dev *pdev)
5487 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5488 struct Scsi_Host *host = pinstance->host;
5491 pci_set_power_state(pdev, PCI_D0);
5492 pci_enable_wake(pdev, PCI_D0, 0);
5493 pci_restore_state(pdev);
5495 rc = pci_enable_device(pdev);
5498 dev_err(&pdev->dev, "resume: Enable device failed\n");
5502 pci_set_master(pdev);
5504 if ((sizeof(dma_addr_t) == 4) ||
5505 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5506 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5509 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5512 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
5513 goto disable_device;
5516 pmcraid_disable_interrupts(pinstance, ~0);
5517 atomic_set(&pinstance->outstanding_cmds, 0);
5518 rc = pmcraid_register_interrupt_handler(pinstance);
5522 "resume: couldn't register interrupt handlers\n");
5527 pmcraid_init_tasklets(pinstance);
5528 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5530 /* Start with hard reset sequence which brings up IOA to operational
5531 * state as well as completes the reset sequence.
5533 pinstance->ioa_hard_reset = 1;
5535 /* Start IOA firmware initialization and bring card to Operational
5538 if (pmcraid_reset_bringup(pinstance)) {
5539 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5541 goto release_tasklets;
5547 pmcraid_disable_interrupts(pinstance, ~0);
5548 pmcraid_kill_tasklets(pinstance);
5549 pmcraid_unregister_interrupt_handler(pinstance);
5552 scsi_host_put(host);
5555 pci_disable_device(pdev);
5562 #define pmcraid_suspend NULL
5563 #define pmcraid_resume NULL
5565 #endif /* CONFIG_PM */
5568 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5569 * completion of the ioa reset
5570 * @cmd: pointer to reset command block
5572 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5574 struct pmcraid_instance *pinstance = cmd->drv_inst;
5575 unsigned long flags;
5577 spin_lock_irqsave(pinstance->host->host_lock, flags);
5578 pmcraid_ioa_reset(cmd);
5579 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5580 scsi_unblock_requests(pinstance->host);
5581 schedule_work(&pinstance->worker_q);
5585 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5587 * @cmd: pointer to pmcraid_cmd structure
5590 * 0 for success or non-zero for failure cases
5592 static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5594 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5595 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5597 pmcraid_reinit_cmdblk(cmd);
5599 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5600 ioarcb->request_type = REQ_TYPE_IOACMD;
5601 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5602 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5604 /* If this was called as part of resource table reinitialization due to
5605 * lost CCN, it is enough to return the command block back to free pool
5606 * as part of set_supported_devs completion function.
5608 if (cmd->drv_inst->reinit_cfg_table) {
5609 cmd->drv_inst->reinit_cfg_table = 0;
5611 cmd_done = pmcraid_reinit_cfgtable_done;
5614 /* we will be done with the reset sequence after set supported devices,
5615 * setup the done function to return the command block back to free
5618 pmcraid_send_cmd(cmd,
5620 PMCRAID_SET_SUP_DEV_TIMEOUT,
5621 pmcraid_timeout_handler);
5626 * pmcraid_set_timestamp - set the timestamp to IOAFP
5628 * @cmd: pointer to pmcraid_cmd structure
5631 * 0 for success or non-zero for failure cases
5633 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5635 struct pmcraid_instance *pinstance = cmd->drv_inst;
5636 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5637 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5638 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5643 do_gettimeofday(&tv);
5644 timestamp = tv.tv_sec * 1000;
5646 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5647 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5648 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5649 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5650 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5651 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5653 pmcraid_reinit_cmdblk(cmd);
5654 ioarcb->request_type = REQ_TYPE_SCSI;
5655 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5656 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5657 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5658 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5660 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5661 offsetof(struct pmcraid_ioarcb,
5662 add_data.u.ioadl[0]));
5663 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5664 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5666 ioarcb->request_flags0 |= NO_LINK_DESCS;
5667 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5668 ioarcb->data_transfer_length =
5669 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5670 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5671 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5672 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5673 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5675 if (!pinstance->timestamp_error) {
5676 pinstance->timestamp_error = 0;
5677 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5678 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5680 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5681 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5688 * pmcraid_init_res_table - Initialize the resource table
5689 * @cmd: pointer to pmcraid command struct
5691 * This function looks through the existing resource table, comparing
5692 * it with the config table. This function will take care of old/new
5693 * devices and schedule adding/removing them from the mid-layer
5699 static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5701 struct pmcraid_instance *pinstance = cmd->drv_inst;
5702 struct pmcraid_resource_entry *res, *temp;
5703 struct pmcraid_config_table_entry *cfgte;
5704 unsigned long lock_flags;
5709 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5710 pmcraid_err("IOA requires microcode download\n");
5712 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5714 /* resource list is protected by pinstance->resource_lock.
5715 * init_res_table can be called from probe (user-thread) or runtime
5716 * reset (timer/tasklet)
5718 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5720 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5721 list_move_tail(&res->queue, &old_res);
5723 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
5724 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5725 PMCRAID_FW_VERSION_1)
5726 cfgte = &pinstance->cfg_table->entries[i];
5728 cfgte = (struct pmcraid_config_table_entry *)
5729 &pinstance->cfg_table->entries_ext[i];
5731 if (!pmcraid_expose_resource(fw_version, cfgte))
5736 /* If this entry was already detected and initialized */
5737 list_for_each_entry_safe(res, temp, &old_res, queue) {
5739 rc = memcmp(&res->cfg_entry.resource_address,
5740 &cfgte->resource_address,
5741 sizeof(cfgte->resource_address));
5743 list_move_tail(&res->queue,
5744 &pinstance->used_res_q);
5750 /* If this is new entry, initialize it and add it the queue */
5753 if (list_empty(&pinstance->free_res_q)) {
5754 pmcraid_err("Too many devices attached\n");
5759 res = list_entry(pinstance->free_res_q.next,
5760 struct pmcraid_resource_entry, queue);
5762 res->scsi_dev = NULL;
5763 res->change_detected = RES_CHANGE_ADD;
5764 res->reset_progress = 0;
5765 list_move_tail(&res->queue, &pinstance->used_res_q);
5768 /* copy new configuration table entry details into driver
5769 * maintained resource entry
5772 memcpy(&res->cfg_entry, cfgte,
5773 pinstance->config_table_entry_size);
5774 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5775 res->cfg_entry.resource_type,
5776 (fw_version <= PMCRAID_FW_VERSION_1 ?
5777 res->cfg_entry.unique_flags1 :
5778 res->cfg_entry.array_id & 0xFF),
5779 le32_to_cpu(res->cfg_entry.resource_address));
5783 /* Detect any deleted entries, mark them for deletion from mid-layer */
5784 list_for_each_entry_safe(res, temp, &old_res, queue) {
5786 if (res->scsi_dev) {
5787 res->change_detected = RES_CHANGE_DEL;
5788 res->cfg_entry.resource_handle =
5789 PMCRAID_INVALID_RES_HANDLE;
5790 list_move_tail(&res->queue, &pinstance->used_res_q);
5792 list_move_tail(&res->queue, &pinstance->free_res_q);
5796 /* release the resource list lock */
5797 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5798 pmcraid_set_timestamp(cmd);
5802 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5803 * @cmd: pointer pmcraid_cmd struct
5805 * This function sends a Query IOA Configuration command to the adapter to
5806 * retrieve the IOA configuration table.
5811 static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5813 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5814 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5815 struct pmcraid_instance *pinstance = cmd->drv_inst;
5816 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5818 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5819 PMCRAID_FW_VERSION_1)
5820 pinstance->config_table_entry_size =
5821 sizeof(struct pmcraid_config_table_entry);
5823 pinstance->config_table_entry_size =
5824 sizeof(struct pmcraid_config_table_entry_ext);
5826 ioarcb->request_type = REQ_TYPE_IOACMD;
5827 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5829 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5831 /* firmware requires 4-byte length field, specified in B.E format */
5832 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5834 /* Since entire config table can be described by single IOADL, it can
5835 * be part of IOARCB itself
5837 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5838 offsetof(struct pmcraid_ioarcb,
5839 add_data.u.ioadl[0]));
5840 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5841 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5843 ioarcb->request_flags0 |= NO_LINK_DESCS;
5844 ioarcb->data_transfer_length =
5845 cpu_to_le32(sizeof(struct pmcraid_config_table));
5847 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5848 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5849 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5850 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5852 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5853 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5858 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5859 * @pdev: pointer to pci device structure
5860 * @dev_id: pointer to device ids structure
5863 * returns 0 if the device is claimed and successfully configured.
5864 * returns non-zero error code in case of any failure
5866 static int pmcraid_probe(struct pci_dev *pdev,
5867 const struct pci_device_id *dev_id)
5869 struct pmcraid_instance *pinstance;
5870 struct Scsi_Host *host;
5871 void __iomem *mapped_pci_addr;
5872 int rc = PCIBIOS_SUCCESSFUL;
5874 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5876 ("maximum number(%d) of supported adapters reached\n",
5877 atomic_read(&pmcraid_adapter_count));
5881 atomic_inc(&pmcraid_adapter_count);
5882 rc = pci_enable_device(pdev);
5885 dev_err(&pdev->dev, "Cannot enable adapter\n");
5886 atomic_dec(&pmcraid_adapter_count);
5890 dev_info(&pdev->dev,
5891 "Found new IOA(%x:%x), Total IOA count: %d\n",
5892 pdev->vendor, pdev->device,
5893 atomic_read(&pmcraid_adapter_count));
5895 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5899 "Couldn't register memory range of registers\n");
5900 goto out_disable_device;
5903 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5905 if (!mapped_pci_addr) {
5906 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5908 goto out_release_regions;
5911 pci_set_master(pdev);
5913 /* Firmware requires the system bus address of IOARCB to be within
5914 * 32-bit addressable range though it has 64-bit IOARRIN register.
5915 * However, firmware supports 64-bit streaming DMA buffers, whereas
5916 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5917 * returns memory within 4GB (if not, change this logic), coherent
5918 * buffers are within firmware acceptable address ranges.
5920 if ((sizeof(dma_addr_t) == 4) ||
5921 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5922 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5924 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5925 * bit mask for pci_alloc_consistent to return addresses within 4GB
5928 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5931 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5935 host = scsi_host_alloc(&pmcraid_host_template,
5936 sizeof(struct pmcraid_instance));
5939 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5944 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5945 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5946 host->unique_id = host->host_no;
5947 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5948 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5950 /* zero out entire instance structure */
5951 pinstance = (struct pmcraid_instance *)host->hostdata;
5952 memset(pinstance, 0, sizeof(*pinstance));
5954 pinstance->chip_cfg =
5955 (struct pmcraid_chip_details *)(dev_id->driver_data);
5957 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5960 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5961 goto out_scsi_host_put;
5964 pci_set_drvdata(pdev, pinstance);
5966 /* Save PCI config-space for use following the reset */
5967 rc = pci_save_state(pinstance->pdev);
5970 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5971 goto out_scsi_host_put;
5974 pmcraid_disable_interrupts(pinstance, ~0);
5976 rc = pmcraid_register_interrupt_handler(pinstance);
5979 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
5980 goto out_scsi_host_put;
5983 pmcraid_init_tasklets(pinstance);
5985 /* allocate verious buffers used by LLD.*/
5986 rc = pmcraid_init_buffers(pinstance);
5989 pmcraid_err("couldn't allocate memory blocks\n");
5990 goto out_unregister_isr;
5993 /* check the reset type required */
5994 pmcraid_reset_type(pinstance);
5996 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5998 /* Start IOA firmware initialization and bring card to Operational
6001 pmcraid_info("starting IOA initialization sequence\n");
6002 if (pmcraid_reset_bringup(pinstance)) {
6003 dev_err(&pdev->dev, "couldn't initialize IOA\n");
6005 goto out_release_bufs;
6008 /* Add adapter instance into mid-layer list */
6009 rc = scsi_add_host(pinstance->host, &pdev->dev);
6011 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
6012 goto out_release_bufs;
6015 scsi_scan_host(pinstance->host);
6017 rc = pmcraid_setup_chrdev(pinstance);
6020 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6022 goto out_remove_host;
6025 /* Schedule worker thread to handle CCN and take care of adding and
6026 * removing devices to OS
6028 atomic_set(&pinstance->expose_resources, 1);
6029 schedule_work(&pinstance->worker_q);
6033 scsi_remove_host(host);
6036 pmcraid_release_buffers(pinstance);
6039 pmcraid_kill_tasklets(pinstance);
6040 pmcraid_unregister_interrupt_handler(pinstance);
6043 scsi_host_put(host);
6046 iounmap(mapped_pci_addr);
6048 out_release_regions:
6049 pci_release_regions(pdev);
6052 atomic_dec(&pmcraid_adapter_count);
6053 pci_disable_device(pdev);
6058 * PCI driver structure of pcmraid driver
6060 static struct pci_driver pmcraid_driver = {
6061 .name = PMCRAID_DRIVER_NAME,
6062 .id_table = pmcraid_pci_table,
6063 .probe = pmcraid_probe,
6064 .remove = pmcraid_remove,
6065 .suspend = pmcraid_suspend,
6066 .resume = pmcraid_resume,
6067 .shutdown = pmcraid_shutdown
6071 * pmcraid_init - module load entry point
6073 static int __init pmcraid_init(void)
6078 pmcraid_info("%s Device Driver version: %s\n",
6079 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
6081 error = alloc_chrdev_region(&dev, 0,
6082 PMCRAID_MAX_ADAPTERS,
6086 pmcraid_err("failed to get a major number for adapters\n");
6090 pmcraid_major = MAJOR(dev);
6091 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6093 if (IS_ERR(pmcraid_class)) {
6094 error = PTR_ERR(pmcraid_class);
6095 pmcraid_err("failed to register with sysfs, error = %x\n",
6097 goto out_unreg_chrdev;
6100 error = pmcraid_netlink_init();
6103 goto out_unreg_chrdev;
6105 error = pci_register_driver(&pmcraid_driver);
6110 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6112 class_destroy(pmcraid_class);
6113 pmcraid_netlink_release();
6116 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
6123 * pmcraid_exit - module unload entry point
6125 static void __exit pmcraid_exit(void)
6127 pmcraid_netlink_release();
6128 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6129 PMCRAID_MAX_ADAPTERS);
6130 pci_unregister_driver(&pmcraid_driver);
6131 class_destroy(pmcraid_class);
6134 module_init(pmcraid_init);
6135 module_exit(pmcraid_exit);