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[] __devinitdata = {
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(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
1517 /* If there are no listeners, genlmsg_multicast may return non-zero
1521 pmcraid_info("error (%x) sending aen event message\n", result);
1526 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1527 * @pinstance: pointer adapter instance structure
1530 * 0 if success, error value in case of any failure
1532 static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1534 return pmcraid_notify_aen(pinstance,
1536 pinstance->ccn.hcam->data_len +
1537 sizeof(struct pmcraid_hcam_hdr));
1541 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1542 * @pinstance: pointer adapter instance structure
1545 * 0 if success, error value in case of any failure
1547 static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1549 return pmcraid_notify_aen(pinstance,
1551 pinstance->ldn.hcam->data_len +
1552 sizeof(struct pmcraid_hcam_hdr));
1556 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1557 * @pinstance: pointer adapter instance structure
1558 * @evt: controller state event to be sent
1561 * 0 if success, error value in case of any failure
1563 static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1565 pinstance->scn.ioa_state = evt;
1566 pmcraid_notify_aen(pinstance,
1567 &pinstance->scn.msg,
1572 * pmcraid_handle_config_change - Handle a config change from the adapter
1573 * @pinstance: pointer to per adapter instance structure
1579 static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1581 struct pmcraid_config_table_entry *cfg_entry;
1582 struct pmcraid_hcam_ccn *ccn_hcam;
1583 struct pmcraid_cmd *cmd;
1584 struct pmcraid_cmd *cfgcmd;
1585 struct pmcraid_resource_entry *res = NULL;
1586 unsigned long lock_flags;
1587 unsigned long host_lock_flags;
1589 u32 hidden_entry = 0;
1593 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1594 cfg_entry = &ccn_hcam->cfg_entry;
1595 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1597 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1598 res: %x:%x:%x:%x\n",
1599 pinstance->ccn.hcam->ilid,
1600 pinstance->ccn.hcam->op_code,
1601 ((pinstance->ccn.hcam->timestamp1) |
1602 ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
1603 pinstance->ccn.hcam->notification_type,
1604 pinstance->ccn.hcam->notification_lost,
1605 pinstance->ccn.hcam->flags,
1606 pinstance->host->unique_id,
1607 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1608 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1609 RES_BUS(cfg_entry->resource_address)),
1610 RES_IS_VSET(*cfg_entry) ?
1611 (fw_version <= PMCRAID_FW_VERSION_1 ?
1612 cfg_entry->unique_flags1 :
1613 cfg_entry->array_id & 0xFF) :
1614 RES_TARGET(cfg_entry->resource_address),
1615 RES_LUN(cfg_entry->resource_address));
1618 /* If this HCAM indicates a lost notification, read the config table */
1619 if (pinstance->ccn.hcam->notification_lost) {
1620 cfgcmd = pmcraid_get_free_cmd(pinstance);
1622 pmcraid_info("lost CCN, reading config table\b");
1623 pinstance->reinit_cfg_table = 1;
1624 pmcraid_querycfg(cfgcmd);
1626 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1628 goto out_notify_apps;
1631 /* If this resource is not going to be added to mid-layer, just notify
1632 * applications and return. If this notification is about hiding a VSET
1633 * resource, check if it was exposed already.
1635 if (pinstance->ccn.hcam->notification_type ==
1636 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1637 cfg_entry->resource_type == RES_TYPE_VSET) {
1639 if (fw_version <= PMCRAID_FW_VERSION_1)
1640 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1642 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1644 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1645 goto out_notify_apps;
1648 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1649 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1650 rc = memcmp(&res->cfg_entry.resource_address,
1651 &cfg_entry->resource_address,
1652 sizeof(cfg_entry->resource_address));
1662 spin_unlock_irqrestore(&pinstance->resource_lock,
1664 goto out_notify_apps;
1667 /* If there are more number of resources than what driver can
1668 * manage, do not notify the applications about the CCN. Just
1669 * ignore this notifications and re-register the same HCAM
1671 if (list_empty(&pinstance->free_res_q)) {
1672 spin_unlock_irqrestore(&pinstance->resource_lock,
1674 pmcraid_err("too many resources attached\n");
1675 spin_lock_irqsave(pinstance->host->host_lock,
1677 pmcraid_send_hcam(pinstance,
1678 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1679 spin_unlock_irqrestore(pinstance->host->host_lock,
1684 res = list_entry(pinstance->free_res_q.next,
1685 struct pmcraid_resource_entry, queue);
1687 list_del(&res->queue);
1688 res->scsi_dev = NULL;
1689 res->reset_progress = 0;
1690 list_add_tail(&res->queue, &pinstance->used_res_q);
1693 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1695 if (pinstance->ccn.hcam->notification_type ==
1696 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1697 if (res->scsi_dev) {
1698 if (fw_version <= PMCRAID_FW_VERSION_1)
1699 res->cfg_entry.unique_flags1 &= 0x7F;
1701 res->cfg_entry.array_id &= 0xFF;
1702 res->change_detected = RES_CHANGE_DEL;
1703 res->cfg_entry.resource_handle =
1704 PMCRAID_INVALID_RES_HANDLE;
1705 schedule_work(&pinstance->worker_q);
1707 /* This may be one of the non-exposed resources */
1708 list_move_tail(&res->queue, &pinstance->free_res_q);
1710 } else if (!res->scsi_dev) {
1711 res->change_detected = RES_CHANGE_ADD;
1712 schedule_work(&pinstance->worker_q);
1714 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1718 /* Notify configuration changes to registered applications.*/
1719 if (!pmcraid_disable_aen)
1720 pmcraid_notify_ccn(pinstance);
1722 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1724 pmcraid_send_hcam_cmd(cmd);
1728 * pmcraid_get_error_info - return error string for an ioasc
1729 * @ioasc: ioasc code
1733 static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1736 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1737 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1738 return &pmcraid_ioasc_error_table[i];
1744 * pmcraid_ioasc_logger - log IOASC information based user-settings
1745 * @ioasc: ioasc code
1746 * @cmd: pointer to command that resulted in 'ioasc'
1748 void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1750 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1752 if (error_info == NULL ||
1753 cmd->drv_inst->current_log_level < error_info->log_level)
1756 /* log the error string */
1757 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1758 cmd->ioa_cb->ioarcb.cdb[0],
1759 cmd->ioa_cb->ioarcb.resource_handle,
1760 le32_to_cpu(ioasc), error_info->error_string);
1764 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1766 * @pinstance: pointer to per adapter instance structure
1771 static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1773 struct pmcraid_hcam_ldn *hcam_ldn;
1776 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1779 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1780 pinstance->ldn.hcam->ilid,
1781 pinstance->ldn.hcam->op_code,
1782 pinstance->ldn.hcam->notification_type,
1783 pinstance->ldn.hcam->notification_lost,
1784 pinstance->ldn.hcam->flags,
1785 pinstance->ldn.hcam->overlay_id);
1787 /* log only the errors, no need to log informational log entries */
1788 if (pinstance->ldn.hcam->notification_type !=
1789 NOTIFICATION_TYPE_ERROR_LOG)
1792 if (pinstance->ldn.hcam->notification_lost ==
1793 HOSTRCB_NOTIFICATIONS_LOST)
1794 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1796 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1798 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1799 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1800 dev_info(&pinstance->pdev->dev,
1801 "UnitAttention due to IOA Bus Reset\n");
1802 scsi_report_bus_reset(
1804 RES_BUS(hcam_ldn->error_log.fd_ra));
1811 * pmcraid_process_ccn - Op done function for a CCN.
1812 * @cmd: pointer to command struct
1814 * This function is the op done function for a configuration
1815 * change notification
1820 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1822 struct pmcraid_instance *pinstance = cmd->drv_inst;
1823 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1824 unsigned long lock_flags;
1826 pinstance->ccn.cmd = NULL;
1827 pmcraid_return_cmd(cmd);
1829 /* If driver initiated IOA reset happened while this hcam was pending
1830 * with IOA, or IOA bringdown sequence is in progress, no need to
1831 * re-register the hcam
1833 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1834 atomic_read(&pinstance->ccn.ignore) == 1) {
1837 dev_info(&pinstance->pdev->dev,
1838 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1839 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1840 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1841 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1843 pmcraid_handle_config_change(pinstance);
1848 * pmcraid_process_ldn - op done function for an LDN
1849 * @cmd: pointer to command block
1854 static void pmcraid_initiate_reset(struct pmcraid_instance *);
1855 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1857 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1859 struct pmcraid_instance *pinstance = cmd->drv_inst;
1860 struct pmcraid_hcam_ldn *ldn_hcam =
1861 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1862 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1863 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1864 unsigned long lock_flags;
1866 /* return the command block back to freepool */
1867 pinstance->ldn.cmd = NULL;
1868 pmcraid_return_cmd(cmd);
1870 /* If driver initiated IOA reset happened while this hcam was pending
1871 * with IOA, no need to re-register the hcam as reset engine will do it
1872 * once reset sequence is complete
1874 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1875 atomic_read(&pinstance->ccn.ignore) == 1) {
1877 } else if (!ioasc) {
1878 pmcraid_handle_error_log(pinstance);
1879 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1880 spin_lock_irqsave(pinstance->host->host_lock,
1882 pmcraid_initiate_reset(pinstance);
1883 spin_unlock_irqrestore(pinstance->host->host_lock,
1887 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1888 pinstance->timestamp_error = 1;
1889 pmcraid_set_timestamp(cmd);
1892 dev_info(&pinstance->pdev->dev,
1893 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1895 /* send netlink message for HCAM notification if enabled */
1896 if (!pmcraid_disable_aen)
1897 pmcraid_notify_ldn(pinstance);
1899 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1901 pmcraid_send_hcam_cmd(cmd);
1905 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1907 * @pinstance: pointer per adapter instance structure
1912 static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1914 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1915 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1919 * pmcraid_unregister_hcams - cancel HCAMs registered already
1920 * @cmd: pointer to command used as part of reset sequence
1922 static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1924 struct pmcraid_instance *pinstance = cmd->drv_inst;
1926 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1927 * handling hcam response though it is not necessary. In order to
1928 * prevent this, set 'ignore', so that bring-down sequence doesn't
1929 * re-send any more hcams
1931 atomic_set(&pinstance->ccn.ignore, 1);
1932 atomic_set(&pinstance->ldn.ignore, 1);
1934 /* If adapter reset was forced as part of runtime reset sequence,
1935 * start the reset sequence. Reset will be triggered even in case
1938 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1939 pinstance->ioa_unit_check) {
1940 pinstance->force_ioa_reset = 0;
1941 pinstance->ioa_unit_check = 0;
1942 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1943 pmcraid_reset_alert(cmd);
1947 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1948 * one after the other. So CCN cancellation will be triggered by
1949 * pmcraid_cancel_ldn itself.
1951 pmcraid_cancel_ldn(cmd);
1955 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1956 * @pinstance: pointer to adapter instance structure
1958 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1960 static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1962 static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1966 pmcraid_reinit_buffers(pinstance);
1967 intrs = pmcraid_read_interrupts(pinstance);
1969 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1971 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1972 if (!pinstance->interrupt_mode) {
1973 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1974 pinstance->int_regs.
1975 ioa_host_interrupt_mask_reg);
1976 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1977 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1986 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1987 * @cmd : pointer to reset command block
1992 static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1994 struct pmcraid_instance *pinstance = cmd->drv_inst;
1998 /* There will be an interrupt when Transition to Operational bit is
1999 * set so tasklet would execute next reset task. The timeout handler
2000 * would re-initiate a reset
2002 cmd->cmd_done = pmcraid_ioa_reset;
2003 cmd->timer.data = (unsigned long)cmd;
2004 cmd->timer.expires = jiffies +
2005 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
2006 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2008 if (!timer_pending(&cmd->timer))
2009 add_timer(&cmd->timer);
2011 /* Enable destructive diagnostics on IOA if it is not yet in
2014 doorbell = DOORBELL_RUNTIME_RESET |
2015 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2017 /* Since we do RESET_ALERT and Start BIST we have to again write
2018 * MSIX Doorbell to indicate the interrupt mode
2020 if (pinstance->interrupt_mode) {
2021 iowrite32(DOORBELL_INTR_MODE_MSIX,
2022 pinstance->int_regs.host_ioa_interrupt_reg);
2023 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2026 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
2027 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2028 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
2030 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2031 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2036 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2038 * @pinstance: pointer to adapter instance structure
2043 static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2045 pmcraid_info("%s is not yet implemented\n", __func__);
2049 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2050 * @pinstance: pointer to adapter instance structure
2052 * This function fails all outstanding ops. If they are submitted to IOA
2053 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2054 * otherwise just completes the commands and returns the cmd blocks to free
2060 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2062 struct pmcraid_cmd *cmd, *temp;
2063 unsigned long lock_flags;
2065 /* pending command list is protected by pending_pool_lock. Its
2066 * traversal must be done as within this lock
2068 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2069 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2071 list_del(&cmd->free_list);
2072 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2074 cmd->ioa_cb->ioasa.ioasc =
2075 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2076 cmd->ioa_cb->ioasa.ilid =
2077 cpu_to_be32(PMCRAID_DRIVER_ILID);
2079 /* In case the command timer is still running */
2080 del_timer(&cmd->timer);
2082 /* If this is an IO command, complete it by invoking scsi_done
2083 * function. If this is one of the internal commands other
2084 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2087 if (cmd->scsi_cmd) {
2089 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2090 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2092 scsi_cmd->result |= DID_ERROR << 16;
2094 scsi_dma_unmap(scsi_cmd);
2095 pmcraid_return_cmd(cmd);
2097 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2098 le32_to_cpu(resp) >> 2,
2099 cmd->ioa_cb->ioarcb.cdb[0],
2101 scsi_cmd->scsi_done(scsi_cmd);
2102 } else if (cmd->cmd_done == pmcraid_internal_done ||
2103 cmd->cmd_done == pmcraid_erp_done) {
2105 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2106 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2107 pmcraid_return_cmd(cmd);
2110 atomic_dec(&pinstance->outstanding_cmds);
2111 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2114 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2118 * pmcraid_ioa_reset - Implementation of IOA reset logic
2120 * @cmd: pointer to the cmd block to be used for entire reset process
2122 * This function executes most of the steps required for IOA reset. This gets
2123 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2124 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2125 * synchronized using host lock. Various functions called during reset process
2126 * would make use of a single command block, pointer to which is also stored in
2127 * adapter instance structure.
2132 static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2134 struct pmcraid_instance *pinstance = cmd->drv_inst;
2135 u8 reset_complete = 0;
2137 pinstance->ioa_reset_in_progress = 1;
2139 if (pinstance->reset_cmd != cmd) {
2140 pmcraid_err("reset is called with different command block\n");
2141 pinstance->reset_cmd = cmd;
2144 pmcraid_info("reset_engine: state = %d, command = %p\n",
2145 pinstance->ioa_state, cmd);
2147 switch (pinstance->ioa_state) {
2149 case IOA_STATE_DEAD:
2150 /* If IOA is offline, whatever may be the reset reason, just
2151 * return. callers might be waiting on the reset wait_q, wake
2154 pmcraid_err("IOA is offline no reset is possible\n");
2158 case IOA_STATE_IN_BRINGDOWN:
2159 /* we enter here, once ioa shutdown command is processed by IOA
2160 * Alert IOA for a possible reset. If reset alert fails, IOA
2161 * goes through hard-reset
2163 pmcraid_disable_interrupts(pinstance, ~0);
2164 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2165 pmcraid_reset_alert(cmd);
2168 case IOA_STATE_UNKNOWN:
2169 /* We may be called during probe or resume. Some pre-processing
2170 * is required for prior to reset
2172 scsi_block_requests(pinstance->host);
2174 /* If asked to reset while IOA was processing responses or
2175 * there are any error responses then IOA may require
2178 if (pinstance->ioa_hard_reset == 0) {
2179 if (ioread32(pinstance->ioa_status) &
2180 INTRS_TRANSITION_TO_OPERATIONAL) {
2181 pmcraid_info("sticky bit set, bring-up\n");
2182 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2183 pmcraid_reinit_cmdblk(cmd);
2184 pmcraid_identify_hrrq(cmd);
2186 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2187 pmcraid_soft_reset(cmd);
2190 /* Alert IOA of a possible reset and wait for critical
2191 * operation in progress bit to reset
2193 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2194 pmcraid_reset_alert(cmd);
2198 case IOA_STATE_IN_RESET_ALERT:
2199 /* If critical operation in progress bit is reset or wait gets
2200 * timed out, reset proceeds with starting BIST on the IOA.
2201 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2202 * they are 3 or more, reset engine marks IOA dead and returns
2204 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2205 pmcraid_start_bist(cmd);
2208 case IOA_STATE_IN_HARD_RESET:
2209 pinstance->ioa_reset_attempts++;
2211 /* retry reset if we haven't reached maximum allowed limit */
2212 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2213 pinstance->ioa_reset_attempts = 0;
2214 pmcraid_err("IOA didn't respond marking it as dead\n");
2215 pinstance->ioa_state = IOA_STATE_DEAD;
2217 if (pinstance->ioa_bringdown)
2218 pmcraid_notify_ioastate(pinstance,
2219 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2221 pmcraid_notify_ioastate(pinstance,
2222 PMC_DEVICE_EVENT_RESET_FAILED);
2227 /* Once either bist or pci reset is done, restore PCI config
2228 * space. If this fails, proceed with hard reset again
2230 pci_restore_state(pinstance->pdev);
2232 /* fail all pending commands */
2233 pmcraid_fail_outstanding_cmds(pinstance);
2235 /* check if unit check is active, if so extract dump */
2236 if (pinstance->ioa_unit_check) {
2237 pmcraid_info("unit check is active\n");
2238 pinstance->ioa_unit_check = 0;
2239 pmcraid_get_dump(pinstance);
2240 pinstance->ioa_reset_attempts--;
2241 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2242 pmcraid_reset_alert(cmd);
2246 /* if the reset reason is to bring-down the ioa, we might be
2247 * done with the reset restore pci_config_space and complete
2250 if (pinstance->ioa_bringdown) {
2251 pmcraid_info("bringing down the adapter\n");
2252 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2253 pinstance->ioa_bringdown = 0;
2254 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2255 pmcraid_notify_ioastate(pinstance,
2256 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2259 /* bring-up IOA, so proceed with soft reset
2260 * Reinitialize hrrq_buffers and their indices also
2261 * enable interrupts after a pci_restore_state
2263 if (pmcraid_reset_enable_ioa(pinstance)) {
2264 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2265 pmcraid_info("bringing up the adapter\n");
2266 pmcraid_reinit_cmdblk(cmd);
2267 pmcraid_identify_hrrq(cmd);
2269 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2270 pmcraid_soft_reset(cmd);
2275 case IOA_STATE_IN_SOFT_RESET:
2276 /* TRANSITION TO OPERATIONAL is on so start initialization
2279 pmcraid_info("In softreset proceeding with bring-up\n");
2280 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2282 /* Initialization commands start with HRRQ identification. From
2283 * now on tasklet completes most of the commands as IOA is up
2284 * and intrs are enabled
2286 pmcraid_identify_hrrq(cmd);
2289 case IOA_STATE_IN_BRINGUP:
2290 /* we are done with bringing up of IOA, change the ioa_state to
2291 * operational and wake up any waiters
2293 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2297 case IOA_STATE_OPERATIONAL:
2299 /* When IOA is operational and a reset is requested, check for
2300 * the reset reason. If reset is to bring down IOA, unregister
2301 * HCAMs and initiate shutdown; if adapter reset is forced then
2302 * restart reset sequence again
2304 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2305 pinstance->force_ioa_reset == 0) {
2306 pmcraid_notify_ioastate(pinstance,
2307 PMC_DEVICE_EVENT_RESET_SUCCESS);
2310 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2311 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2312 pmcraid_reinit_cmdblk(cmd);
2313 pmcraid_unregister_hcams(cmd);
2318 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2319 * OPERATIONAL. Reset all control variables used during reset, wake up
2320 * any waiting threads and let the SCSI mid-layer send commands. Note
2321 * that host_lock must be held before invoking scsi_report_bus_reset.
2323 if (reset_complete) {
2324 pinstance->ioa_reset_in_progress = 0;
2325 pinstance->ioa_reset_attempts = 0;
2326 pinstance->reset_cmd = NULL;
2327 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2328 pinstance->ioa_bringdown = 0;
2329 pmcraid_return_cmd(cmd);
2331 /* If target state is to bring up the adapter, proceed with
2332 * hcam registration and resource exposure to mid-layer.
2334 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2335 pmcraid_register_hcams(pinstance);
2337 wake_up_all(&pinstance->reset_wait_q);
2344 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2345 * ISR/tasklet during error interrupts including IOA unit check. If reset
2346 * is already in progress, it just returns, otherwise initiates IOA reset
2347 * to bring IOA up to operational state.
2349 * @pinstance: pointer to adapter instance structure
2354 static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2356 struct pmcraid_cmd *cmd;
2358 /* If the reset is already in progress, just return, otherwise start
2359 * reset sequence and return
2361 if (!pinstance->ioa_reset_in_progress) {
2362 scsi_block_requests(pinstance->host);
2363 cmd = pmcraid_get_free_cmd(pinstance);
2366 pmcraid_err("no cmnd blocks for initiate_reset\n");
2370 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2371 pinstance->reset_cmd = cmd;
2372 pinstance->force_ioa_reset = 1;
2373 pmcraid_notify_ioastate(pinstance,
2374 PMC_DEVICE_EVENT_RESET_START);
2375 pmcraid_ioa_reset(cmd);
2380 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2382 * @pinstance: pointer adapter instance structure
2383 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2384 * @target_state: expected target state after reset
2386 * Note: This command initiates reset and waits for its completion. Hence this
2387 * should not be called from isr/timer/tasklet functions (timeout handlers,
2388 * error response handlers and interrupt handlers).
2391 * 1 in case ioa_state is not target_state, 0 otherwise.
2393 static int pmcraid_reset_reload(
2394 struct pmcraid_instance *pinstance,
2399 struct pmcraid_cmd *reset_cmd = NULL;
2400 unsigned long lock_flags;
2403 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2405 if (pinstance->ioa_reset_in_progress) {
2406 pmcraid_info("reset_reload: reset is already in progress\n");
2408 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2410 wait_event(pinstance->reset_wait_q,
2411 !pinstance->ioa_reset_in_progress);
2413 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2415 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2416 spin_unlock_irqrestore(pinstance->host->host_lock,
2418 pmcraid_info("reset_reload: IOA is dead\n");
2420 } else if (pinstance->ioa_state == target_state) {
2426 pmcraid_info("reset_reload: proceeding with reset\n");
2427 scsi_block_requests(pinstance->host);
2428 reset_cmd = pmcraid_get_free_cmd(pinstance);
2430 if (reset_cmd == NULL) {
2431 pmcraid_err("no free cmnd for reset_reload\n");
2432 spin_unlock_irqrestore(pinstance->host->host_lock,
2437 if (shutdown_type == SHUTDOWN_NORMAL)
2438 pinstance->ioa_bringdown = 1;
2440 pinstance->ioa_shutdown_type = shutdown_type;
2441 pinstance->reset_cmd = reset_cmd;
2442 pinstance->force_ioa_reset = reset;
2443 pmcraid_info("reset_reload: initiating reset\n");
2444 pmcraid_ioa_reset(reset_cmd);
2445 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2446 pmcraid_info("reset_reload: waiting for reset to complete\n");
2447 wait_event(pinstance->reset_wait_q,
2448 !pinstance->ioa_reset_in_progress);
2450 pmcraid_info("reset_reload: reset is complete !!\n");
2451 scsi_unblock_requests(pinstance->host);
2452 if (pinstance->ioa_state == target_state)
2460 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2462 * @pinstance: pointer to adapter instance structure
2465 * whatever is returned from pmcraid_reset_reload
2467 static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2469 return pmcraid_reset_reload(pinstance,
2475 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2477 * @pinstance: pointer to adapter instance structure
2480 * whatever is returned from pmcraid_reset_reload
2482 static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2484 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2486 return pmcraid_reset_reload(pinstance,
2488 IOA_STATE_OPERATIONAL);
2492 * pmcraid_request_sense - Send request sense to a device
2493 * @cmd: pmcraid command struct
2495 * This function sends a request sense to a device as a result of a check
2496 * condition. This method re-uses the same command block that failed earlier.
2498 static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2500 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2501 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2503 /* allocate DMAable memory for sense buffers */
2504 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2505 SCSI_SENSE_BUFFERSIZE,
2506 &cmd->sense_buffer_dma);
2508 if (cmd->sense_buffer == NULL) {
2510 ("couldn't allocate sense buffer for request sense\n");
2511 pmcraid_erp_done(cmd);
2515 /* re-use the command block */
2516 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2517 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2518 ioarcb->request_flags0 = (SYNC_COMPLETE |
2521 ioarcb->request_type = REQ_TYPE_SCSI;
2522 ioarcb->cdb[0] = REQUEST_SENSE;
2523 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2525 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2526 offsetof(struct pmcraid_ioarcb,
2527 add_data.u.ioadl[0]));
2528 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2530 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2532 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2533 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2534 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2536 /* request sense might be called as part of error response processing
2537 * which runs in tasklets context. It is possible that mid-layer might
2538 * schedule queuecommand during this time, hence, writting to IOARRIN
2539 * must be protect by host_lock
2541 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2542 PMCRAID_REQUEST_SENSE_TIMEOUT,
2543 pmcraid_timeout_handler);
2547 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2548 * @cmd: command that failed
2549 * @sense: true if request_sense is required after cancel all
2551 * This function sends a cancel all to a device to clear the queue.
2553 static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2555 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2556 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2557 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2558 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2559 : pmcraid_request_sense;
2561 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2562 ioarcb->request_flags0 = SYNC_OVERRIDE;
2563 ioarcb->request_type = REQ_TYPE_IOACMD;
2564 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2566 if (RES_IS_GSCSI(res->cfg_entry))
2567 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2569 ioarcb->ioadl_bus_addr = 0;
2570 ioarcb->ioadl_length = 0;
2571 ioarcb->data_transfer_length = 0;
2572 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2574 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2575 * schedule queuecommand while we are doing this
2577 pmcraid_send_cmd(cmd, cmd_done,
2578 PMCRAID_REQUEST_SENSE_TIMEOUT,
2579 pmcraid_timeout_handler);
2583 * pmcraid_frame_auto_sense: frame fixed format sense information
2585 * @cmd: pointer to failing command block
2590 static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2592 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2593 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2594 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2595 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2596 u32 failing_lba = 0;
2598 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2599 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2601 if (RES_IS_VSET(res->cfg_entry) &&
2602 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2603 ioasa->u.vset.failing_lba_hi != 0) {
2605 sense_buf[0] = 0x72;
2606 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2607 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2608 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2612 sense_buf[9] = 0x0A;
2613 sense_buf[10] = 0x80;
2615 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2617 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2618 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2619 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2620 sense_buf[15] = failing_lba & 0x000000ff;
2622 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2624 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2625 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2626 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2627 sense_buf[19] = failing_lba & 0x000000ff;
2629 sense_buf[0] = 0x70;
2630 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2631 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2632 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2634 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2635 if (RES_IS_VSET(res->cfg_entry))
2637 le32_to_cpu(ioasa->u.
2638 vset.failing_lba_lo);
2639 sense_buf[0] |= 0x80;
2640 sense_buf[3] = (failing_lba >> 24) & 0xff;
2641 sense_buf[4] = (failing_lba >> 16) & 0xff;
2642 sense_buf[5] = (failing_lba >> 8) & 0xff;
2643 sense_buf[6] = failing_lba & 0xff;
2646 sense_buf[7] = 6; /* additional length */
2651 * pmcraid_error_handler - Error response handlers for a SCSI op
2652 * @cmd: pointer to pmcraid_cmd that has failed
2654 * This function determines whether or not to initiate ERP on the affected
2655 * device. This is called from a tasklet, which doesn't hold any locks.
2658 * 0 it caller can complete the request, otherwise 1 where in error
2659 * handler itself completes the request and returns the command block
2662 static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2664 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2665 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2666 struct pmcraid_instance *pinstance = cmd->drv_inst;
2667 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2668 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2669 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2670 u32 sense_copied = 0;
2673 pmcraid_info("resource pointer is NULL\n");
2677 /* If this was a SCSI read/write command keep count of errors */
2678 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2679 atomic_inc(&res->read_failures);
2680 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2681 atomic_inc(&res->write_failures);
2683 if (!RES_IS_GSCSI(res->cfg_entry) &&
2684 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2685 pmcraid_frame_auto_sense(cmd);
2688 /* Log IOASC/IOASA information based on user settings */
2689 pmcraid_ioasc_logger(ioasc, cmd);
2691 switch (masked_ioasc) {
2693 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2694 scsi_cmd->result |= (DID_ABORT << 16);
2697 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2698 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2699 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2702 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2704 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2707 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2708 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2711 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2712 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2713 if (!res->reset_progress)
2714 scsi_report_bus_reset(pinstance->host,
2715 scsi_cmd->device->channel);
2716 scsi_cmd->result |= (DID_ERROR << 16);
2719 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2720 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2723 /* if check_condition is not active return with error otherwise
2724 * get/frame the sense buffer
2726 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2727 SAM_STAT_CHECK_CONDITION &&
2728 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2731 /* If we have auto sense data as part of IOASA pass it to
2734 if (ioasa->auto_sense_length != 0) {
2735 short sense_len = ioasa->auto_sense_length;
2736 int data_size = min_t(u16, le16_to_cpu(sense_len),
2737 SCSI_SENSE_BUFFERSIZE);
2739 memcpy(scsi_cmd->sense_buffer,
2745 if (RES_IS_GSCSI(res->cfg_entry))
2746 pmcraid_cancel_all(cmd, sense_copied);
2747 else if (sense_copied)
2748 pmcraid_erp_done(cmd);
2750 pmcraid_request_sense(cmd);
2754 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2758 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2759 scsi_cmd->result |= (DID_ERROR << 16);
2766 * pmcraid_reset_device - device reset handler functions
2768 * @scsi_cmd: scsi command struct
2769 * @modifier: reset modifier indicating the reset sequence to be performed
2771 * This function issues a device reset to the affected device.
2772 * A LUN reset will be sent to the device first. If that does
2773 * not work, a target reset will be sent.
2778 static int pmcraid_reset_device(
2779 struct scsi_cmnd *scsi_cmd,
2780 unsigned long timeout,
2784 struct pmcraid_cmd *cmd;
2785 struct pmcraid_instance *pinstance;
2786 struct pmcraid_resource_entry *res;
2787 struct pmcraid_ioarcb *ioarcb;
2788 unsigned long lock_flags;
2792 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2793 res = scsi_cmd->device->hostdata;
2796 sdev_printk(KERN_ERR, scsi_cmd->device,
2797 "reset_device: NULL resource pointer\n");
2801 /* If adapter is currently going through reset/reload, return failed.
2802 * This will force the mid-layer to call _eh_bus/host reset, which
2803 * will then go to sleep and wait for the reset to complete
2805 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2806 if (pinstance->ioa_reset_in_progress ||
2807 pinstance->ioa_state == IOA_STATE_DEAD) {
2808 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2812 res->reset_progress = 1;
2813 pmcraid_info("Resetting %s resource with addr %x\n",
2814 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2815 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2816 le32_to_cpu(res->cfg_entry.resource_address));
2818 /* get a free cmd block */
2819 cmd = pmcraid_get_free_cmd(pinstance);
2822 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2823 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2827 ioarcb = &cmd->ioa_cb->ioarcb;
2828 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2829 ioarcb->request_type = REQ_TYPE_IOACMD;
2830 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2832 /* Initialize reset modifier bits */
2834 modifier = ENABLE_RESET_MODIFIER | modifier;
2836 ioarcb->cdb[1] = modifier;
2838 init_completion(&cmd->wait_for_completion);
2839 cmd->completion_req = 1;
2841 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2842 cmd->ioa_cb->ioarcb.cdb[0],
2843 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2844 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2846 pmcraid_send_cmd(cmd,
2847 pmcraid_internal_done,
2849 pmcraid_timeout_handler);
2851 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2853 /* RESET_DEVICE command completes after all pending IOARCBs are
2854 * completed. Once this command is completed, pmcraind_internal_done
2855 * will wake up the 'completion' queue.
2857 wait_for_completion(&cmd->wait_for_completion);
2859 /* complete the command here itself and return the command block
2862 pmcraid_return_cmd(cmd);
2863 res->reset_progress = 0;
2864 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2866 /* set the return value based on the returned ioasc */
2867 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2871 * _pmcraid_io_done - helper for pmcraid_io_done function
2873 * @cmd: pointer to pmcraid command struct
2874 * @reslen: residual data length to be set in the ioasa
2875 * @ioasc: ioasc either returned by IOA or set by driver itself.
2877 * This function is invoked by pmcraid_io_done to complete mid-layer
2881 * 0 if caller is required to return it to free_pool. Returns 1 if
2882 * caller need not worry about freeing command block as error handler
2883 * will take care of that.
2886 static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2888 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2891 scsi_set_resid(scsi_cmd, reslen);
2893 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2894 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2895 cmd->ioa_cb->ioarcb.cdb[0],
2896 ioasc, scsi_cmd->result);
2898 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2899 rc = pmcraid_error_handler(cmd);
2902 scsi_dma_unmap(scsi_cmd);
2903 scsi_cmd->scsi_done(scsi_cmd);
2910 * pmcraid_io_done - SCSI completion function
2912 * @cmd: pointer to pmcraid command struct
2914 * This function is invoked by tasklet/mid-layer error handler to completing
2915 * the SCSI ops sent from mid-layer.
2921 static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2923 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2924 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2926 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2927 pmcraid_return_cmd(cmd);
2931 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2933 * @cmd: command block of the command to be aborted
2936 * returns pointer to command structure used as cancelling cmd
2938 static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2940 struct pmcraid_cmd *cancel_cmd;
2941 struct pmcraid_instance *pinstance;
2942 struct pmcraid_resource_entry *res;
2944 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2945 res = cmd->scsi_cmd->device->hostdata;
2947 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2949 if (cancel_cmd == NULL) {
2950 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2954 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2956 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2957 cmd->ioa_cb->ioarcb.cdb[0],
2958 cmd->ioa_cb->ioarcb.response_handle >> 2);
2960 init_completion(&cancel_cmd->wait_for_completion);
2961 cancel_cmd->completion_req = 1;
2963 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2964 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2965 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2966 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2968 pmcraid_send_cmd(cancel_cmd,
2969 pmcraid_internal_done,
2970 PMCRAID_INTERNAL_TIMEOUT,
2971 pmcraid_timeout_handler);
2976 * pmcraid_abort_complete - Waits for ABORT TASK completion
2978 * @cancel_cmd: command block use as cancelling command
2981 * returns SUCCESS if ABORT TASK has good completion
2984 static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2986 struct pmcraid_resource_entry *res;
2989 wait_for_completion(&cancel_cmd->wait_for_completion);
2990 res = cancel_cmd->res;
2991 cancel_cmd->res = NULL;
2992 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2994 /* If the abort task is not timed out we will get a Good completion
2995 * as sense_key, otherwise we may get one the following responses
2996 * due to subsequent bus reset or device reset. In case IOASC is
2997 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2999 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
3000 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
3001 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3006 /* complete the command here itself */
3007 pmcraid_return_cmd(cancel_cmd);
3008 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3012 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3014 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3015 * mid-layer ensures that no other commands are queued. This
3016 * never gets called under interrupt, but a separate eh thread.
3021 static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3023 struct pmcraid_instance *pinstance;
3024 struct pmcraid_cmd *cmd;
3025 struct pmcraid_resource_entry *res;
3026 unsigned long host_lock_flags;
3027 unsigned long pending_lock_flags;
3028 struct pmcraid_cmd *cancel_cmd = NULL;
3033 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3035 scmd_printk(KERN_INFO, scsi_cmd,
3036 "I/O command timed out, aborting it.\n");
3038 res = scsi_cmd->device->hostdata;
3043 /* If we are currently going through reset/reload, return failed.
3044 * This will force the mid-layer to eventually call
3045 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3048 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3050 if (pinstance->ioa_reset_in_progress ||
3051 pinstance->ioa_state == IOA_STATE_DEAD) {
3052 spin_unlock_irqrestore(pinstance->host->host_lock,
3057 /* loop over pending cmd list to find cmd corresponding to this
3058 * scsi_cmd. Note that this command might not have been completed
3059 * already. locking: all pending commands are protected with
3060 * pending_pool_lock.
3062 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3063 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3065 if (cmd->scsi_cmd == scsi_cmd) {
3071 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3072 pending_lock_flags);
3074 /* If the command to be aborted was given to IOA and still pending with
3075 * it, send ABORT_TASK to abort this and wait for its completion
3078 cancel_cmd = pmcraid_abort_cmd(cmd);
3080 spin_unlock_irqrestore(pinstance->host->host_lock,
3084 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
3085 rc = pmcraid_abort_complete(cancel_cmd);
3088 return cmd_found ? rc : SUCCESS;
3092 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3094 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3096 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3097 * Since these are called from mid-layer EH thread, no other IO will be queued
3098 * to the resource being reset. However, control path (IOCTL) may be active so
3099 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3100 * takes care by locking/unlocking host_lock.
3105 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3107 scmd_printk(KERN_INFO, scmd,
3108 "resetting device due to an I/O command timeout.\n");
3109 return pmcraid_reset_device(scmd,
3110 PMCRAID_INTERNAL_TIMEOUT,
3114 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3116 scmd_printk(KERN_INFO, scmd,
3117 "Doing bus reset due to an I/O command timeout.\n");
3118 return pmcraid_reset_device(scmd,
3119 PMCRAID_RESET_BUS_TIMEOUT,
3123 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3125 scmd_printk(KERN_INFO, scmd,
3126 "Doing target reset due to an I/O command timeout.\n");
3127 return pmcraid_reset_device(scmd,
3128 PMCRAID_INTERNAL_TIMEOUT,
3129 RESET_DEVICE_TARGET);
3133 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3135 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3137 * Initiates adapter reset to bring it up to operational state
3142 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3144 unsigned long interval = 10000; /* 10 seconds interval */
3145 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3146 struct pmcraid_instance *pinstance =
3147 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3150 /* wait for an additional 150 seconds just in case firmware could come
3151 * up and if it could complete all the pending commands excluding the
3152 * two HCAM (CCN and LDN).
3155 if (atomic_read(&pinstance->outstanding_cmds) <=
3156 PMCRAID_MAX_HCAM_CMD)
3161 dev_err(&pinstance->pdev->dev,
3162 "Adapter being reset due to an I/O command timeout.\n");
3163 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3167 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3168 * @scsi_cmd: scsi command struct
3171 * number of tags or 0 if the task is not tagged
3173 static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3178 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3180 case MSG_SIMPLE_TAG:
3181 rc = TASK_TAG_SIMPLE;
3184 rc = TASK_TAG_QUEUE_HEAD;
3186 case MSG_ORDERED_TAG:
3187 rc = TASK_TAG_ORDERED;
3197 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3198 * @cmd: pmcraid command struct
3199 * @sgcount: count of scatter-gather elements
3202 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3203 * or external IOADLs
3205 struct pmcraid_ioadl_desc *
3206 pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3208 struct pmcraid_ioadl_desc *ioadl;
3209 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3210 int ioadl_count = 0;
3212 if (ioarcb->add_cmd_param_length)
3213 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3214 ioarcb->ioadl_length =
3215 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3217 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3218 /* external ioadls start at offset 0x80 from control_block
3219 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3220 * It is necessary to indicate to firmware that driver is
3221 * using ioadls to be treated as external to IOARCB.
3223 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3224 ioarcb->ioadl_bus_addr =
3225 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3226 offsetof(struct pmcraid_ioarcb,
3227 add_data.u.ioadl[3]));
3228 ioadl = &ioarcb->add_data.u.ioadl[3];
3230 ioarcb->ioadl_bus_addr =
3231 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3232 offsetof(struct pmcraid_ioarcb,
3233 add_data.u.ioadl[ioadl_count]));
3235 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3236 ioarcb->ioarcb_bus_addr |=
3237 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3244 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3245 * @pinstance: pointer to adapter instance structure
3246 * @cmd: pmcraid command struct
3248 * This function is invoked by queuecommand entry point while sending a command
3249 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3252 * 0 on success or -1 on failure
3254 static int pmcraid_build_ioadl(
3255 struct pmcraid_instance *pinstance,
3256 struct pmcraid_cmd *cmd
3260 struct scatterlist *sglist;
3262 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3263 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3264 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3266 u32 length = scsi_bufflen(scsi_cmd);
3271 nseg = scsi_dma_map(scsi_cmd);
3274 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3276 } else if (nseg > PMCRAID_MAX_IOADLS) {
3277 scsi_dma_unmap(scsi_cmd);
3278 scmd_printk(KERN_ERR, scsi_cmd,
3279 "sg count is (%d) more than allowed!\n", nseg);
3283 /* Initialize IOARCB data transfer length fields */
3284 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3285 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3287 ioarcb->request_flags0 |= NO_LINK_DESCS;
3288 ioarcb->data_transfer_length = cpu_to_le32(length);
3289 ioadl = pmcraid_init_ioadls(cmd, nseg);
3291 /* Initialize IOADL descriptor addresses */
3292 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3293 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3294 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3297 /* setup last descriptor */
3298 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3304 * pmcraid_free_sglist - Frees an allocated SG buffer list
3305 * @sglist: scatter/gather list pointer
3307 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3312 static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3316 for (i = 0; i < sglist->num_sg; i++)
3317 __free_pages(sg_page(&(sglist->scatterlist[i])),
3324 * pmcraid_alloc_sglist - Allocates memory for a SG list
3325 * @buflen: buffer length
3327 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3331 * pointer to sglist / NULL on failure
3333 static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3335 struct pmcraid_sglist *sglist;
3336 struct scatterlist *scatterlist;
3343 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3344 order = (sg_size > 0) ? get_order(sg_size) : 0;
3345 bsize_elem = PAGE_SIZE * (1 << order);
3347 /* Determine the actual number of sg entries needed */
3348 if (buflen % bsize_elem)
3349 num_elem = (buflen / bsize_elem) + 1;
3351 num_elem = buflen / bsize_elem;
3353 /* Allocate a scatter/gather list for the DMA */
3354 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3355 (sizeof(struct scatterlist) * (num_elem - 1)),
3361 scatterlist = sglist->scatterlist;
3362 sg_init_table(scatterlist, num_elem);
3363 sglist->order = order;
3364 sglist->num_sg = num_elem;
3367 for (i = 0; i < num_elem; i++) {
3368 page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
3370 for (j = i - 1; j >= 0; j--)
3371 __free_pages(sg_page(&scatterlist[j]), order);
3376 sg_set_page(&scatterlist[i], page,
3377 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3378 sg_size -= bsize_elem;
3385 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3386 * @sglist: scatter/gather list pointer
3387 * @buffer: buffer pointer
3388 * @len: buffer length
3389 * @direction: data transfer direction
3391 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3394 * 0 on success / other on failure
3396 static int pmcraid_copy_sglist(
3397 struct pmcraid_sglist *sglist,
3398 unsigned long buffer,
3403 struct scatterlist *scatterlist;
3409 /* Determine the actual number of bytes per element */
3410 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3412 scatterlist = sglist->scatterlist;
3414 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3415 struct page *page = sg_page(&scatterlist[i]);
3418 if (direction == DMA_TO_DEVICE)
3419 rc = __copy_from_user(kaddr,
3423 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3428 pmcraid_err("failed to copy user data into sg list\n");
3432 scatterlist[i].length = bsize_elem;
3435 if (len % bsize_elem) {
3436 struct page *page = sg_page(&scatterlist[i]);
3440 if (direction == DMA_TO_DEVICE)
3441 rc = __copy_from_user(kaddr,
3445 rc = __copy_to_user((void *)buffer,
3451 scatterlist[i].length = len % bsize_elem;
3455 pmcraid_err("failed to copy user data into sg list\n");
3463 * pmcraid_queuecommand - Queue a mid-layer request
3464 * @scsi_cmd: scsi command struct
3465 * @done: done function
3467 * This function queues a request generated by the mid-layer. Midlayer calls
3468 * this routine within host->lock. Some of the functions called by queuecommand
3469 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3473 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3474 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3476 static int pmcraid_queuecommand_lck(
3477 struct scsi_cmnd *scsi_cmd,
3478 void (*done) (struct scsi_cmnd *)
3481 struct pmcraid_instance *pinstance;
3482 struct pmcraid_resource_entry *res;
3483 struct pmcraid_ioarcb *ioarcb;
3484 struct pmcraid_cmd *cmd;
3489 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3490 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3491 scsi_cmd->scsi_done = done;
3492 res = scsi_cmd->device->hostdata;
3493 scsi_cmd->result = (DID_OK << 16);
3495 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3498 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3499 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3500 scsi_cmd->result = (DID_NO_CONNECT << 16);
3501 scsi_cmd->scsi_done(scsi_cmd);
3505 /* If IOA reset is in progress, can't queue the commands */
3506 if (pinstance->ioa_reset_in_progress)
3507 return SCSI_MLQUEUE_HOST_BUSY;
3509 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3510 * the command here itself with success return
3512 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3513 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3514 scsi_cmd->scsi_done(scsi_cmd);
3518 /* initialize the command and IOARCB to be sent to IOA */
3519 cmd = pmcraid_get_free_cmd(pinstance);
3522 pmcraid_err("free command block is not available\n");
3523 return SCSI_MLQUEUE_HOST_BUSY;
3526 cmd->scsi_cmd = scsi_cmd;
3527 ioarcb = &(cmd->ioa_cb->ioarcb);
3528 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3529 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3530 ioarcb->request_type = REQ_TYPE_SCSI;
3532 /* set hrrq number where the IOA should respond to. Note that all cmds
3533 * generated internally uses hrrq_id 0, exception to this is the cmd
3534 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3535 * hrrq_id assigned here in queuecommand
3537 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3538 pinstance->num_hrrq;
3539 cmd->cmd_done = pmcraid_io_done;
3541 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3542 if (scsi_cmd->underflow == 0)
3543 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3545 if (res->sync_reqd) {
3546 ioarcb->request_flags0 |= SYNC_COMPLETE;
3550 ioarcb->request_flags0 |= NO_LINK_DESCS;
3551 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3553 if (RES_IS_GSCSI(res->cfg_entry))
3554 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3557 rc = pmcraid_build_ioadl(pinstance, cmd);
3559 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3560 le32_to_cpu(ioarcb->response_handle) >> 2,
3561 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3562 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3563 PMCRAID_PHYS_BUS_ID,
3564 RES_IS_VSET(res->cfg_entry) ?
3565 (fw_version <= PMCRAID_FW_VERSION_1 ?
3566 res->cfg_entry.unique_flags1 :
3567 res->cfg_entry.array_id & 0xFF) :
3568 RES_TARGET(res->cfg_entry.resource_address),
3569 RES_LUN(res->cfg_entry.resource_address));
3571 if (likely(rc == 0)) {
3572 _pmcraid_fire_command(cmd);
3574 pmcraid_err("queuecommand could not build ioadl\n");
3575 pmcraid_return_cmd(cmd);
3576 rc = SCSI_MLQUEUE_HOST_BUSY;
3582 static DEF_SCSI_QCMD(pmcraid_queuecommand)
3585 * pmcraid_open -char node "open" entry, allowed only users with admin access
3587 static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3589 struct pmcraid_instance *pinstance;
3591 if (!capable(CAP_SYS_ADMIN))
3594 /* Populate adapter instance * pointer for use by ioctl */
3595 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3596 filep->private_data = pinstance;
3602 * pmcraid_release - char node "release" entry point
3604 static int pmcraid_chr_release(struct inode *inode, struct file *filep)
3606 struct pmcraid_instance *pinstance = filep->private_data;
3608 filep->private_data = NULL;
3609 fasync_helper(-1, filep, 0, &pinstance->aen_queue);
3615 * pmcraid_fasync - Async notifier registration from applications
3617 * This function adds the calling process to a driver global queue. When an
3618 * event occurs, SIGIO will be sent to all processes in this queue.
3620 static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3622 struct pmcraid_instance *pinstance;
3625 pinstance = filep->private_data;
3626 mutex_lock(&pinstance->aen_queue_lock);
3627 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3628 mutex_unlock(&pinstance->aen_queue_lock);
3635 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3636 * commands sent over IOCTL interface
3638 * @cmd : pointer to struct pmcraid_cmd
3639 * @buflen : length of the request buffer
3640 * @direction : data transfer direction
3643 * 0 on success, non-zero error code on failure
3645 static int pmcraid_build_passthrough_ioadls(
3646 struct pmcraid_cmd *cmd,
3651 struct pmcraid_sglist *sglist = NULL;
3652 struct scatterlist *sg = NULL;
3653 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3654 struct pmcraid_ioadl_desc *ioadl;
3657 sglist = pmcraid_alloc_sglist(buflen);
3660 pmcraid_err("can't allocate memory for passthrough SGls\n");
3664 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3665 sglist->scatterlist,
3666 sglist->num_sg, direction);
3668 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3669 dev_err(&cmd->drv_inst->pdev->dev,
3670 "Failed to map passthrough buffer!\n");
3671 pmcraid_free_sglist(sglist);
3675 cmd->sglist = sglist;
3676 ioarcb->request_flags0 |= NO_LINK_DESCS;
3678 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3680 /* Initialize IOADL descriptor addresses */
3681 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3682 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3683 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3687 /* setup the last descriptor */
3688 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3695 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3697 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3698 * @buflen: size of the request buffer
3699 * @direction: data transfer direction
3702 * 0 on success, non-zero error code on failure
3704 static void pmcraid_release_passthrough_ioadls(
3705 struct pmcraid_cmd *cmd,
3710 struct pmcraid_sglist *sglist = cmd->sglist;
3713 pci_unmap_sg(cmd->drv_inst->pdev,
3714 sglist->scatterlist,
3717 pmcraid_free_sglist(sglist);
3723 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3725 * @pinstance: pointer to adapter instance structure
3727 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3730 * 0 on success, non-zero error code on failure
3732 static long pmcraid_ioctl_passthrough(
3733 struct pmcraid_instance *pinstance,
3734 unsigned int ioctl_cmd,
3735 unsigned int buflen,
3739 struct pmcraid_passthrough_ioctl_buffer *buffer;
3740 struct pmcraid_ioarcb *ioarcb;
3741 struct pmcraid_cmd *cmd;
3742 struct pmcraid_cmd *cancel_cmd;
3743 unsigned long request_buffer;
3744 unsigned long request_offset;
3745 unsigned long lock_flags;
3750 u8 access, direction;
3753 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3754 if (pinstance->ioa_reset_in_progress) {
3755 rc = wait_event_interruptible_timeout(
3756 pinstance->reset_wait_q,
3757 !pinstance->ioa_reset_in_progress,
3758 msecs_to_jiffies(10000));
3763 return -ERESTARTSYS;
3766 /* If adapter is not in operational state, return error */
3767 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3768 pmcraid_err("IOA is not operational\n");
3772 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3773 buffer = kmalloc(buffer_size, GFP_KERNEL);
3776 pmcraid_err("no memory for passthrough buffer\n");
3781 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3783 request_buffer = arg + request_offset;
3785 rc = __copy_from_user(buffer,
3786 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3787 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3791 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3794 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3796 goto out_free_buffer;
3799 request_size = buffer->ioarcb.data_transfer_length;
3801 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3802 access = VERIFY_READ;
3803 direction = DMA_TO_DEVICE;
3805 access = VERIFY_WRITE;
3806 direction = DMA_FROM_DEVICE;
3809 if (request_size > 0) {
3810 rc = access_ok(access, arg, request_offset + request_size);
3814 goto out_free_buffer;
3816 } else if (request_size < 0) {
3818 goto out_free_buffer;
3821 /* check if we have any additional command parameters */
3822 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3824 goto out_free_buffer;
3827 cmd = pmcraid_get_free_cmd(pinstance);
3830 pmcraid_err("free command block is not available\n");
3832 goto out_free_buffer;
3835 cmd->scsi_cmd = NULL;
3836 ioarcb = &(cmd->ioa_cb->ioarcb);
3838 /* Copy the user-provided IOARCB stuff field by field */
3839 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3840 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3841 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3842 ioarcb->request_type = buffer->ioarcb.request_type;
3843 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3844 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3845 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3847 if (buffer->ioarcb.add_cmd_param_length) {
3848 ioarcb->add_cmd_param_length =
3849 buffer->ioarcb.add_cmd_param_length;
3850 ioarcb->add_cmd_param_offset =
3851 buffer->ioarcb.add_cmd_param_offset;
3852 memcpy(ioarcb->add_data.u.add_cmd_params,
3853 buffer->ioarcb.add_data.u.add_cmd_params,
3854 buffer->ioarcb.add_cmd_param_length);
3857 /* set hrrq number where the IOA should respond to. Note that all cmds
3858 * generated internally uses hrrq_id 0, exception to this is the cmd
3859 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3860 * hrrq_id assigned here in queuecommand
3862 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3863 pinstance->num_hrrq;
3866 rc = pmcraid_build_passthrough_ioadls(cmd,
3870 pmcraid_err("couldn't build passthrough ioadls\n");
3871 goto out_free_buffer;
3873 } else if (request_size < 0) {
3875 goto out_free_buffer;
3878 /* If data is being written into the device, copy the data from user
3881 if (direction == DMA_TO_DEVICE && request_size > 0) {
3882 rc = pmcraid_copy_sglist(cmd->sglist,
3887 pmcraid_err("failed to copy user buffer\n");
3888 goto out_free_sglist;
3892 /* passthrough ioctl is a blocking command so, put the user to sleep
3893 * until timeout. Note that a timeout value of 0 means, do timeout.
3895 cmd->cmd_done = pmcraid_internal_done;
3896 init_completion(&cmd->wait_for_completion);
3897 cmd->completion_req = 1;
3899 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3900 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3901 cmd->ioa_cb->ioarcb.cdb[0],
3902 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3904 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3905 _pmcraid_fire_command(cmd);
3906 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3908 /* NOTE ! Remove the below line once abort_task is implemented
3909 * in firmware. This line disables ioctl command timeout handling logic
3910 * similar to IO command timeout handling, making ioctl commands to wait
3911 * until the command completion regardless of timeout value specified in
3914 buffer->ioarcb.cmd_timeout = 0;
3916 /* If command timeout is specified put caller to wait till that time,
3917 * otherwise it would be blocking wait. If command gets timed out, it
3920 if (buffer->ioarcb.cmd_timeout == 0) {
3921 wait_for_completion(&cmd->wait_for_completion);
3922 } else if (!wait_for_completion_timeout(
3923 &cmd->wait_for_completion,
3924 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3926 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3927 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3928 cmd->ioa_cb->ioarcb.cdb[0]);
3930 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3931 cancel_cmd = pmcraid_abort_cmd(cmd);
3932 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3935 wait_for_completion(&cancel_cmd->wait_for_completion);
3936 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
3937 pmcraid_return_cmd(cancel_cmd);
3939 /* if abort task couldn't find the command i.e it got
3940 * completed prior to aborting, return good completion.
3941 * if command got aborted successfully or there was IOA
3942 * reset due to abort task itself getting timedout then
3945 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3946 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3947 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3949 goto out_handle_response;
3953 /* no command block for abort task or abort task failed to abort
3954 * the IOARCB, then wait for 150 more seconds and initiate reset
3955 * sequence after timeout
3957 if (!wait_for_completion_timeout(
3958 &cmd->wait_for_completion,
3959 msecs_to_jiffies(150 * 1000))) {
3960 pmcraid_reset_bringup(cmd->drv_inst);
3965 out_handle_response:
3966 /* copy entire IOASA buffer and return IOCTL success.
3967 * If copying IOASA to user-buffer fails, return
3970 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3971 sizeof(struct pmcraid_ioasa))) {
3972 pmcraid_err("failed to copy ioasa buffer to user\n");
3976 /* If the data transfer was from device, copy the data onto user
3979 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3980 rc = pmcraid_copy_sglist(cmd->sglist,
3985 pmcraid_err("failed to copy user buffer\n");
3991 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3992 pmcraid_return_cmd(cmd);
4004 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
4006 * @pinstance: pointer to adapter instance structure
4007 * @cmd: ioctl command passed in
4008 * @buflen: length of user_buffer
4009 * @user_buffer: user buffer pointer
4012 * 0 in case of success, otherwise appropriate error code
4014 static long pmcraid_ioctl_driver(
4015 struct pmcraid_instance *pinstance,
4017 unsigned int buflen,
4018 void __user *user_buffer
4023 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
4024 pmcraid_err("ioctl_driver: access fault in request buffer\n");
4029 case PMCRAID_IOCTL_RESET_ADAPTER:
4030 pmcraid_reset_bringup(pinstance);
4042 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4044 * @cmd: ioctl command
4046 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4049 * negetive error code if there are access issues, otherwise zero.
4050 * Upon success, returns ioctl header copied out of user buffer.
4053 static int pmcraid_check_ioctl_buffer(
4056 struct pmcraid_ioctl_header *hdr
4060 int access = VERIFY_READ;
4062 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4063 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4067 /* check for valid driver signature */
4068 rc = memcmp(hdr->signature,
4069 PMCRAID_IOCTL_SIGNATURE,
4070 sizeof(hdr->signature));
4072 pmcraid_err("signature verification failed\n");
4076 /* check for appropriate buffer access */
4077 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4078 access = VERIFY_WRITE;
4080 rc = access_ok(access,
4081 (arg + sizeof(struct pmcraid_ioctl_header)),
4082 hdr->buffer_length);
4084 pmcraid_err("access failed for user buffer of size %d\n",
4085 hdr->buffer_length);
4093 * pmcraid_ioctl - char node ioctl entry point
4095 static long pmcraid_chr_ioctl(
4101 struct pmcraid_instance *pinstance = NULL;
4102 struct pmcraid_ioctl_header *hdr = NULL;
4103 int retval = -ENOTTY;
4105 hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL);
4108 pmcraid_err("faile to allocate memory for ioctl header\n");
4112 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4115 pmcraid_info("chr_ioctl: header check failed\n");
4120 pinstance = filep->private_data;
4123 pmcraid_info("adapter instance is not found\n");
4128 switch (_IOC_TYPE(cmd)) {
4130 case PMCRAID_PASSTHROUGH_IOCTL:
4131 /* If ioctl code is to download microcode, we need to block
4132 * mid-layer requests.
4134 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4135 scsi_block_requests(pinstance->host);
4137 retval = pmcraid_ioctl_passthrough(pinstance,
4142 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4143 scsi_unblock_requests(pinstance->host);
4146 case PMCRAID_DRIVER_IOCTL:
4147 arg += sizeof(struct pmcraid_ioctl_header);
4148 retval = pmcraid_ioctl_driver(pinstance,
4151 (void __user *)arg);
4165 * File operations structure for management interface
4167 static const struct file_operations pmcraid_fops = {
4168 .owner = THIS_MODULE,
4169 .open = pmcraid_chr_open,
4170 .release = pmcraid_chr_release,
4171 .fasync = pmcraid_chr_fasync,
4172 .unlocked_ioctl = pmcraid_chr_ioctl,
4173 #ifdef CONFIG_COMPAT
4174 .compat_ioctl = pmcraid_chr_ioctl,
4176 .llseek = noop_llseek,
4183 * pmcraid_show_log_level - Display adapter's error logging level
4184 * @dev: class device struct
4188 * number of bytes printed to buffer
4190 static ssize_t pmcraid_show_log_level(
4192 struct device_attribute *attr,
4195 struct Scsi_Host *shost = class_to_shost(dev);
4196 struct pmcraid_instance *pinstance =
4197 (struct pmcraid_instance *)shost->hostdata;
4198 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4202 * pmcraid_store_log_level - Change the adapter's error logging level
4203 * @dev: class device struct
4208 * number of bytes printed to buffer
4210 static ssize_t pmcraid_store_log_level(
4212 struct device_attribute *attr,
4217 struct Scsi_Host *shost;
4218 struct pmcraid_instance *pinstance;
4221 if (strict_strtoul(buf, 10, &val))
4223 /* log-level should be from 0 to 2 */
4227 shost = class_to_shost(dev);
4228 pinstance = (struct pmcraid_instance *)shost->hostdata;
4229 pinstance->current_log_level = val;
4234 static struct device_attribute pmcraid_log_level_attr = {
4236 .name = "log_level",
4237 .mode = S_IRUGO | S_IWUSR,
4239 .show = pmcraid_show_log_level,
4240 .store = pmcraid_store_log_level,
4244 * pmcraid_show_drv_version - Display driver version
4245 * @dev: class device struct
4249 * number of bytes printed to buffer
4251 static ssize_t pmcraid_show_drv_version(
4253 struct device_attribute *attr,
4257 return snprintf(buf, PAGE_SIZE, "version: %s\n",
4258 PMCRAID_DRIVER_VERSION);
4261 static struct device_attribute pmcraid_driver_version_attr = {
4263 .name = "drv_version",
4266 .show = pmcraid_show_drv_version,
4270 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4271 * @dev: class device struct
4275 * number of bytes printed to buffer
4277 static ssize_t pmcraid_show_adapter_id(
4279 struct device_attribute *attr,
4283 struct Scsi_Host *shost = class_to_shost(dev);
4284 struct pmcraid_instance *pinstance =
4285 (struct pmcraid_instance *)shost->hostdata;
4286 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4287 pinstance->pdev->devfn;
4288 u32 aen_group = pmcraid_event_family.id;
4290 return snprintf(buf, PAGE_SIZE,
4291 "adapter id: %d\nminor: %d\naen group: %d\n",
4292 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4295 static struct device_attribute pmcraid_adapter_id_attr = {
4297 .name = "adapter_id",
4298 .mode = S_IRUGO | S_IWUSR,
4300 .show = pmcraid_show_adapter_id,
4303 static struct device_attribute *pmcraid_host_attrs[] = {
4304 &pmcraid_log_level_attr,
4305 &pmcraid_driver_version_attr,
4306 &pmcraid_adapter_id_attr,
4311 /* host template structure for pmcraid driver */
4312 static struct scsi_host_template pmcraid_host_template = {
4313 .module = THIS_MODULE,
4314 .name = PMCRAID_DRIVER_NAME,
4315 .queuecommand = pmcraid_queuecommand,
4316 .eh_abort_handler = pmcraid_eh_abort_handler,
4317 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4318 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4319 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4320 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4322 .slave_alloc = pmcraid_slave_alloc,
4323 .slave_configure = pmcraid_slave_configure,
4324 .slave_destroy = pmcraid_slave_destroy,
4325 .change_queue_depth = pmcraid_change_queue_depth,
4326 .change_queue_type = pmcraid_change_queue_type,
4327 .can_queue = PMCRAID_MAX_IO_CMD,
4329 .sg_tablesize = PMCRAID_MAX_IOADLS,
4330 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4331 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4332 .use_clustering = ENABLE_CLUSTERING,
4333 .shost_attrs = pmcraid_host_attrs,
4334 .proc_name = PMCRAID_DRIVER_NAME
4338 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4339 * @irq: interrupt vector number
4340 * @dev_id: pointer hrrq_vector
4343 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4346 static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
4348 struct pmcraid_isr_param *hrrq_vector;
4349 struct pmcraid_instance *pinstance;
4350 unsigned long lock_flags;
4354 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4355 hrrq_id = hrrq_vector->hrrq_id;
4356 pinstance = hrrq_vector->drv_inst;
4359 /* Read the interrupt */
4360 intrs_val = pmcraid_read_interrupts(pinstance);
4362 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4363 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4364 /* Any error interrupts including unit_check,
4365 * initiate IOA reset.In case of unit check indicate
4366 * to reset_sequence that IOA unit checked and prepare
4367 * for a dump during reset sequence
4369 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4370 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4371 pinstance->ioa_unit_check = 1;
4373 pmcraid_err("ISR: error interrupts: %x \
4374 initiating reset\n", intrs_val);
4375 spin_lock_irqsave(pinstance->host->host_lock,
4377 pmcraid_initiate_reset(pinstance);
4378 spin_unlock_irqrestore(
4379 pinstance->host->host_lock,
4382 /* If interrupt was as part of the ioa initialization,
4383 * clear it. Delete the timer and wakeup the
4384 * reset engine to proceed with reset sequence
4386 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4387 pmcraid_clr_trans_op(pinstance);
4389 /* Clear the interrupt register by writing
4390 * to host to ioa doorbell. Once done
4391 * FW will clear the interrupt.
4393 iowrite32(DOORBELL_INTR_MSIX_CLR,
4394 pinstance->int_regs.host_ioa_interrupt_reg);
4395 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4401 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4407 * pmcraid_isr - implements legacy interrupt handling routine
4409 * @irq: interrupt vector number
4410 * @dev_id: pointer hrrq_vector
4413 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4415 static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4417 struct pmcraid_isr_param *hrrq_vector;
4418 struct pmcraid_instance *pinstance;
4420 unsigned long lock_flags;
4423 /* In case of legacy interrupt mode where interrupts are shared across
4424 * isrs, it may be possible that the current interrupt is not from IOA
4427 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4430 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4431 pinstance = hrrq_vector->drv_inst;
4433 intrs = pmcraid_read_interrupts(pinstance);
4435 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
4438 /* Any error interrupts including unit_check, initiate IOA reset.
4439 * In case of unit check indicate to reset_sequence that IOA unit
4440 * checked and prepare for a dump during reset sequence
4442 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4444 if (intrs & INTRS_IOA_UNIT_CHECK)
4445 pinstance->ioa_unit_check = 1;
4448 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4449 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4452 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4453 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
4454 pmcraid_initiate_reset(pinstance);
4455 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
4457 /* If interrupt was as part of the ioa initialization,
4458 * clear. Delete the timer and wakeup the
4459 * reset engine to proceed with reset sequence
4461 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4462 pmcraid_clr_trans_op(pinstance);
4465 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4467 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4470 &(pinstance->isr_tasklet[hrrq_id]));
4479 * pmcraid_worker_function - worker thread function
4481 * @workp: pointer to struct work queue
4487 static void pmcraid_worker_function(struct work_struct *workp)
4489 struct pmcraid_instance *pinstance;
4490 struct pmcraid_resource_entry *res;
4491 struct pmcraid_resource_entry *temp;
4492 struct scsi_device *sdev;
4493 unsigned long lock_flags;
4494 unsigned long host_lock_flags;
4496 u8 bus, target, lun;
4498 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4499 /* add resources only after host is added into system */
4500 if (!atomic_read(&pinstance->expose_resources))
4503 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4505 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4506 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4508 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4509 sdev = res->scsi_dev;
4511 /* host_lock must be held before calling
4514 spin_lock_irqsave(pinstance->host->host_lock,
4516 if (!scsi_device_get(sdev)) {
4517 spin_unlock_irqrestore(
4518 pinstance->host->host_lock,
4520 pmcraid_info("deleting %x from midlayer\n",
4521 res->cfg_entry.resource_address);
4522 list_move_tail(&res->queue,
4523 &pinstance->free_res_q);
4524 spin_unlock_irqrestore(
4525 &pinstance->resource_lock,
4527 scsi_remove_device(sdev);
4528 scsi_device_put(sdev);
4529 spin_lock_irqsave(&pinstance->resource_lock,
4531 res->change_detected = 0;
4533 spin_unlock_irqrestore(
4534 pinstance->host->host_lock,
4540 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4542 if (res->change_detected == RES_CHANGE_ADD) {
4544 if (!pmcraid_expose_resource(fw_version,
4548 if (RES_IS_VSET(res->cfg_entry)) {
4549 bus = PMCRAID_VSET_BUS_ID;
4550 if (fw_version <= PMCRAID_FW_VERSION_1)
4551 target = res->cfg_entry.unique_flags1;
4553 target = res->cfg_entry.array_id & 0xFF;
4554 lun = PMCRAID_VSET_LUN_ID;
4556 bus = PMCRAID_PHYS_BUS_ID;
4559 res->cfg_entry.resource_address);
4560 lun = RES_LUN(res->cfg_entry.resource_address);
4563 res->change_detected = 0;
4564 spin_unlock_irqrestore(&pinstance->resource_lock,
4566 scsi_add_device(pinstance->host, bus, target, lun);
4567 spin_lock_irqsave(&pinstance->resource_lock,
4572 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4576 * pmcraid_tasklet_function - Tasklet function
4578 * @instance: pointer to msix param structure
4583 static void pmcraid_tasklet_function(unsigned long instance)
4585 struct pmcraid_isr_param *hrrq_vector;
4586 struct pmcraid_instance *pinstance;
4587 unsigned long hrrq_lock_flags;
4588 unsigned long pending_lock_flags;
4589 unsigned long host_lock_flags;
4590 spinlock_t *lockp; /* hrrq buffer lock */
4594 hrrq_vector = (struct pmcraid_isr_param *)instance;
4595 pinstance = hrrq_vector->drv_inst;
4596 id = hrrq_vector->hrrq_id;
4597 lockp = &(pinstance->hrrq_lock[id]);
4599 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4600 * protected by its own lock. Traversals must be done within this lock
4601 * as there may be multiple tasklets running on multiple CPUs. Note
4602 * that the lock is held just for picking up the response handle and
4603 * manipulating hrrq_curr/toggle_bit values.
4605 spin_lock_irqsave(lockp, hrrq_lock_flags);
4607 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4609 while ((resp & HRRQ_TOGGLE_BIT) ==
4610 pinstance->host_toggle_bit[id]) {
4612 int cmd_index = resp >> 2;
4613 struct pmcraid_cmd *cmd = NULL;
4615 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4616 pinstance->hrrq_curr[id]++;
4618 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4619 pinstance->host_toggle_bit[id] ^= 1u;
4622 if (cmd_index >= PMCRAID_MAX_CMD) {
4623 /* In case of invalid response handle, log message */
4624 pmcraid_err("Invalid response handle %d\n", cmd_index);
4625 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4629 cmd = pinstance->cmd_list[cmd_index];
4630 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4632 spin_lock_irqsave(&pinstance->pending_pool_lock,
4633 pending_lock_flags);
4634 list_del(&cmd->free_list);
4635 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4636 pending_lock_flags);
4637 del_timer(&cmd->timer);
4638 atomic_dec(&pinstance->outstanding_cmds);
4640 if (cmd->cmd_done == pmcraid_ioa_reset) {
4641 spin_lock_irqsave(pinstance->host->host_lock,
4644 spin_unlock_irqrestore(pinstance->host->host_lock,
4646 } else if (cmd->cmd_done != NULL) {
4649 /* loop over until we are done with all responses */
4650 spin_lock_irqsave(lockp, hrrq_lock_flags);
4651 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4654 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4658 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4659 * @pinstance: pointer to adapter instance structure
4661 * This routine un-registers registered interrupt handler and
4662 * also frees irqs/vectors.
4668 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4672 for (i = 0; i < pinstance->num_hrrq; i++)
4673 free_irq(pinstance->hrrq_vector[i].vector,
4674 &(pinstance->hrrq_vector[i]));
4676 if (pinstance->interrupt_mode) {
4677 pci_disable_msix(pinstance->pdev);
4678 pinstance->interrupt_mode = 0;
4683 * pmcraid_register_interrupt_handler - registers interrupt handler
4684 * @pinstance: pointer to per-adapter instance structure
4687 * 0 on success, non-zero error code otherwise.
4690 pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4693 struct pci_dev *pdev = pinstance->pdev;
4695 if ((pmcraid_enable_msix) &&
4696 (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
4697 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4698 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4700 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4701 entries[i].entry = i;
4703 rc = pci_enable_msix(pdev, entries, num_hrrq);
4705 goto pmcraid_isr_legacy;
4707 /* Check how many MSIX vectors are allocated and register
4708 * msi-x handlers for each of them giving appropriate buffer
4712 if (pci_enable_msix(pdev, entries, num_hrrq))
4713 goto pmcraid_isr_legacy;
4716 for (i = 0; i < num_hrrq; i++) {
4717 pinstance->hrrq_vector[i].hrrq_id = i;
4718 pinstance->hrrq_vector[i].drv_inst = pinstance;
4719 pinstance->hrrq_vector[i].vector = entries[i].vector;
4720 rc = request_irq(pinstance->hrrq_vector[i].vector,
4721 pmcraid_isr_msix, 0,
4722 PMCRAID_DRIVER_NAME,
4723 &(pinstance->hrrq_vector[i]));
4727 for (j = 0; j < i; j++)
4728 free_irq(entries[j].vector,
4729 &(pinstance->hrrq_vector[j]));
4730 pci_disable_msix(pdev);
4731 goto pmcraid_isr_legacy;
4735 pinstance->num_hrrq = num_hrrq;
4736 pinstance->interrupt_mode = 1;
4737 iowrite32(DOORBELL_INTR_MODE_MSIX,
4738 pinstance->int_regs.host_ioa_interrupt_reg);
4739 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4740 goto pmcraid_isr_out;
4744 /* If MSI-X registration failed fallback to legacy mode, where
4745 * only one hrrq entry will be used
4747 pinstance->hrrq_vector[0].hrrq_id = 0;
4748 pinstance->hrrq_vector[0].drv_inst = pinstance;
4749 pinstance->hrrq_vector[0].vector = pdev->irq;
4750 pinstance->num_hrrq = 1;
4753 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4754 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4760 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4761 * @pinstance: per adapter instance structure pointer
4762 * @max_index: number of buffer blocks to release
4768 pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4771 for (i = 0; i < max_index; i++) {
4772 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4773 pinstance->cmd_list[i] = NULL;
4775 kmem_cache_destroy(pinstance->cmd_cachep);
4776 pinstance->cmd_cachep = NULL;
4780 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4781 * @pinstance: pointer to per adapter instance structure
4782 * @max_index: number of buffers (from 0 onwards) to release
4784 * This function assumes that the command blocks for which control blocks are
4785 * linked are not released.
4791 pmcraid_release_control_blocks(
4792 struct pmcraid_instance *pinstance,
4798 if (pinstance->control_pool == NULL)
4801 for (i = 0; i < max_index; i++) {
4802 pci_pool_free(pinstance->control_pool,
4803 pinstance->cmd_list[i]->ioa_cb,
4804 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4805 pinstance->cmd_list[i]->ioa_cb = NULL;
4806 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4808 pci_pool_destroy(pinstance->control_pool);
4809 pinstance->control_pool = NULL;
4813 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4814 * @pinstance - pointer to per adapter instance structure
4816 * Allocates memory for command blocks using kernel slab allocator.
4819 * 0 in case of success; -ENOMEM in case of failure
4821 static int __devinit
4822 pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4826 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4827 pinstance->host->unique_id);
4830 pinstance->cmd_cachep = kmem_cache_create(
4831 pinstance->cmd_pool_name,
4832 sizeof(struct pmcraid_cmd), 0,
4833 SLAB_HWCACHE_ALIGN, NULL);
4834 if (!pinstance->cmd_cachep)
4837 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4838 pinstance->cmd_list[i] =
4839 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4840 if (!pinstance->cmd_list[i]) {
4841 pmcraid_release_cmd_blocks(pinstance, i);
4849 * pmcraid_allocate_control_blocks - allocates memory control blocks
4850 * @pinstance : pointer to per adapter instance structure
4852 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4853 * and IOASAs. This is called after command blocks are already allocated.
4856 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4858 static int __devinit
4859 pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4863 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4864 pinstance->host->unique_id);
4866 pinstance->control_pool =
4867 pci_pool_create(pinstance->ctl_pool_name,
4869 sizeof(struct pmcraid_control_block),
4870 PMCRAID_IOARCB_ALIGNMENT, 0);
4872 if (!pinstance->control_pool)
4875 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4876 pinstance->cmd_list[i]->ioa_cb =
4878 pinstance->control_pool,
4880 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4882 if (!pinstance->cmd_list[i]->ioa_cb) {
4883 pmcraid_release_control_blocks(pinstance, i);
4886 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4887 sizeof(struct pmcraid_control_block));
4893 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4894 * @pinstance: pointer to per adapter instance structure
4895 * @maxindex: size of hrrq buffer pointer array
4901 pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4904 for (i = 0; i < maxindex; i++) {
4906 pci_free_consistent(pinstance->pdev,
4907 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4908 pinstance->hrrq_start[i],
4909 pinstance->hrrq_start_bus_addr[i]);
4911 /* reset pointers and toggle bit to zeros */
4912 pinstance->hrrq_start[i] = NULL;
4913 pinstance->hrrq_start_bus_addr[i] = 0;
4914 pinstance->host_toggle_bit[i] = 0;
4919 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4920 * @pinstance: pointer to per adapter instance structure
4923 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4925 static int __devinit
4926 pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4930 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4932 for (i = 0; i < pinstance->num_hrrq; i++) {
4933 pinstance->hrrq_start[i] =
4934 pci_alloc_consistent(
4937 &(pinstance->hrrq_start_bus_addr[i]));
4939 if (pinstance->hrrq_start[i] == 0) {
4940 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4942 pmcraid_release_host_rrqs(pinstance, i);
4946 memset(pinstance->hrrq_start[i], 0, buffer_size);
4947 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4948 pinstance->hrrq_end[i] =
4949 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4950 pinstance->host_toggle_bit[i] = 1;
4951 spin_lock_init(&pinstance->hrrq_lock[i]);
4957 * pmcraid_release_hcams - release HCAM buffers
4959 * @pinstance: pointer to per adapter instance structure
4964 static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4966 if (pinstance->ccn.msg != NULL) {
4967 pci_free_consistent(pinstance->pdev,
4968 PMCRAID_AEN_HDR_SIZE +
4969 sizeof(struct pmcraid_hcam_ccn_ext),
4971 pinstance->ccn.baddr);
4973 pinstance->ccn.msg = NULL;
4974 pinstance->ccn.hcam = NULL;
4975 pinstance->ccn.baddr = 0;
4978 if (pinstance->ldn.msg != NULL) {
4979 pci_free_consistent(pinstance->pdev,
4980 PMCRAID_AEN_HDR_SIZE +
4981 sizeof(struct pmcraid_hcam_ldn),
4983 pinstance->ldn.baddr);
4985 pinstance->ldn.msg = NULL;
4986 pinstance->ldn.hcam = NULL;
4987 pinstance->ldn.baddr = 0;
4992 * pmcraid_allocate_hcams - allocates HCAM buffers
4993 * @pinstance : pointer to per adapter instance structure
4996 * 0 in case of successful allocation, non-zero otherwise
4998 static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
5000 pinstance->ccn.msg = pci_alloc_consistent(
5002 PMCRAID_AEN_HDR_SIZE +
5003 sizeof(struct pmcraid_hcam_ccn_ext),
5004 &(pinstance->ccn.baddr));
5006 pinstance->ldn.msg = pci_alloc_consistent(
5008 PMCRAID_AEN_HDR_SIZE +
5009 sizeof(struct pmcraid_hcam_ldn),
5010 &(pinstance->ldn.baddr));
5012 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
5013 pmcraid_release_hcams(pinstance);
5015 pinstance->ccn.hcam =
5016 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5017 pinstance->ldn.hcam =
5018 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5020 atomic_set(&pinstance->ccn.ignore, 0);
5021 atomic_set(&pinstance->ldn.ignore, 0);
5024 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5028 * pmcraid_release_config_buffers - release config.table buffers
5029 * @pinstance: pointer to per adapter instance structure
5034 static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5036 if (pinstance->cfg_table != NULL &&
5037 pinstance->cfg_table_bus_addr != 0) {
5038 pci_free_consistent(pinstance->pdev,
5039 sizeof(struct pmcraid_config_table),
5040 pinstance->cfg_table,
5041 pinstance->cfg_table_bus_addr);
5042 pinstance->cfg_table = NULL;
5043 pinstance->cfg_table_bus_addr = 0;
5046 if (pinstance->res_entries != NULL) {
5049 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5050 list_del(&pinstance->res_entries[i].queue);
5051 kfree(pinstance->res_entries);
5052 pinstance->res_entries = NULL;
5055 pmcraid_release_hcams(pinstance);
5059 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5060 * @pinstance : pointer to per adapter instance structure
5063 * 0 for successful allocation, -ENOMEM for any failure
5065 static int __devinit
5066 pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
5070 pinstance->res_entries =
5071 kzalloc(sizeof(struct pmcraid_resource_entry) *
5072 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5074 if (NULL == pinstance->res_entries) {
5075 pmcraid_err("failed to allocate memory for resource table\n");
5079 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5080 list_add_tail(&pinstance->res_entries[i].queue,
5081 &pinstance->free_res_q);
5083 pinstance->cfg_table =
5084 pci_alloc_consistent(pinstance->pdev,
5085 sizeof(struct pmcraid_config_table),
5086 &pinstance->cfg_table_bus_addr);
5088 if (NULL == pinstance->cfg_table) {
5089 pmcraid_err("couldn't alloc DMA memory for config table\n");
5090 pmcraid_release_config_buffers(pinstance);
5094 if (pmcraid_allocate_hcams(pinstance)) {
5095 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5096 pmcraid_release_config_buffers(pinstance);
5104 * pmcraid_init_tasklets - registers tasklets for response handling
5106 * @pinstance: pointer adapter instance structure
5111 static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5114 for (i = 0; i < pinstance->num_hrrq; i++)
5115 tasklet_init(&pinstance->isr_tasklet[i],
5116 pmcraid_tasklet_function,
5117 (unsigned long)&pinstance->hrrq_vector[i]);
5121 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5123 * @pinstance: pointer to adapter instance structure
5128 static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5131 for (i = 0; i < pinstance->num_hrrq; i++)
5132 tasklet_kill(&pinstance->isr_tasklet[i]);
5136 * pmcraid_release_buffers - release per-adapter buffers allocated
5138 * @pinstance: pointer to adapter soft state
5143 static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5145 pmcraid_release_config_buffers(pinstance);
5146 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5147 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5148 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5150 if (pinstance->inq_data != NULL) {
5151 pci_free_consistent(pinstance->pdev,
5152 sizeof(struct pmcraid_inquiry_data),
5153 pinstance->inq_data,
5154 pinstance->inq_data_baddr);
5156 pinstance->inq_data = NULL;
5157 pinstance->inq_data_baddr = 0;
5160 if (pinstance->timestamp_data != NULL) {
5161 pci_free_consistent(pinstance->pdev,
5162 sizeof(struct pmcraid_timestamp_data),
5163 pinstance->timestamp_data,
5164 pinstance->timestamp_data_baddr);
5166 pinstance->timestamp_data = NULL;
5167 pinstance->timestamp_data_baddr = 0;
5172 * pmcraid_init_buffers - allocates memory and initializes various structures
5173 * @pinstance: pointer to per adapter instance structure
5175 * This routine pre-allocates memory based on the type of block as below:
5176 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5177 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5178 * config-table entries : DMAable memory using pci_alloc_consistent
5179 * HostRRQs : DMAable memory, using pci_alloc_consistent
5182 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5184 static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
5188 if (pmcraid_allocate_host_rrqs(pinstance)) {
5189 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5190 pinstance->num_hrrq);
5194 if (pmcraid_allocate_config_buffers(pinstance)) {
5195 pmcraid_err("couldn't allocate memory for config buffers\n");
5196 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5200 if (pmcraid_allocate_cmd_blocks(pinstance)) {
5201 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5202 pmcraid_release_config_buffers(pinstance);
5203 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5207 if (pmcraid_allocate_control_blocks(pinstance)) {
5208 pmcraid_err("couldn't allocate memory control blocks\n");
5209 pmcraid_release_config_buffers(pinstance);
5210 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5211 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5215 /* allocate DMAable memory for page D0 INQUIRY buffer */
5216 pinstance->inq_data = pci_alloc_consistent(
5218 sizeof(struct pmcraid_inquiry_data),
5219 &pinstance->inq_data_baddr);
5221 if (pinstance->inq_data == NULL) {
5222 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5223 pmcraid_release_buffers(pinstance);
5227 /* allocate DMAable memory for set timestamp data buffer */
5228 pinstance->timestamp_data = pci_alloc_consistent(
5230 sizeof(struct pmcraid_timestamp_data),
5231 &pinstance->timestamp_data_baddr);
5233 if (pinstance->timestamp_data == NULL) {
5234 pmcraid_err("couldn't allocate DMA memory for \
5235 set time_stamp \n");
5236 pmcraid_release_buffers(pinstance);
5241 /* Initialize all the command blocks and add them to free pool. No
5242 * need to lock (free_pool_lock) as this is done in initialization
5245 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5246 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5247 pmcraid_init_cmdblk(cmdp, i);
5248 cmdp->drv_inst = pinstance;
5249 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5256 * pmcraid_reinit_buffers - resets various buffer pointers
5257 * @pinstance: pointer to adapter instance
5261 static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5264 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5266 for (i = 0; i < pinstance->num_hrrq; i++) {
5267 memset(pinstance->hrrq_start[i], 0, buffer_size);
5268 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5269 pinstance->hrrq_end[i] =
5270 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5271 pinstance->host_toggle_bit[i] = 1;
5276 * pmcraid_init_instance - initialize per instance data structure
5277 * @pdev: pointer to pci device structure
5278 * @host: pointer to Scsi_Host structure
5279 * @mapped_pci_addr: memory mapped IOA configuration registers
5282 * 0 on success, non-zero in case of any failure
5284 static int __devinit pmcraid_init_instance(
5285 struct pci_dev *pdev,
5286 struct Scsi_Host *host,
5287 void __iomem *mapped_pci_addr
5290 struct pmcraid_instance *pinstance =
5291 (struct pmcraid_instance *)host->hostdata;
5293 pinstance->host = host;
5294 pinstance->pdev = pdev;
5296 /* Initialize register addresses */
5297 pinstance->mapped_dma_addr = mapped_pci_addr;
5299 /* Initialize chip-specific details */
5301 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5302 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5304 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5306 pint_regs->ioa_host_interrupt_reg =
5307 mapped_pci_addr + chip_cfg->ioa_host_intr;
5308 pint_regs->ioa_host_interrupt_clr_reg =
5309 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
5310 pint_regs->ioa_host_msix_interrupt_reg =
5311 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
5312 pint_regs->host_ioa_interrupt_reg =
5313 mapped_pci_addr + chip_cfg->host_ioa_intr;
5314 pint_regs->host_ioa_interrupt_clr_reg =
5315 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5317 /* Current version of firmware exposes interrupt mask set
5318 * and mask clr registers through memory mapped bar0.
5320 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5321 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5322 pint_regs->ioa_host_interrupt_mask_reg =
5323 mapped_pci_addr + chip_cfg->ioa_host_mask;
5324 pint_regs->ioa_host_interrupt_mask_clr_reg =
5325 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5326 pint_regs->global_interrupt_mask_reg =
5327 mapped_pci_addr + chip_cfg->global_intr_mask;
5330 pinstance->ioa_reset_attempts = 0;
5331 init_waitqueue_head(&pinstance->reset_wait_q);
5333 atomic_set(&pinstance->outstanding_cmds, 0);
5334 atomic_set(&pinstance->last_message_id, 0);
5335 atomic_set(&pinstance->expose_resources, 0);
5337 INIT_LIST_HEAD(&pinstance->free_res_q);
5338 INIT_LIST_HEAD(&pinstance->used_res_q);
5339 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5340 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5342 spin_lock_init(&pinstance->free_pool_lock);
5343 spin_lock_init(&pinstance->pending_pool_lock);
5344 spin_lock_init(&pinstance->resource_lock);
5345 mutex_init(&pinstance->aen_queue_lock);
5347 /* Work-queue (Shared) for deferred processing error handling */
5348 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5350 /* Initialize the default log_level */
5351 pinstance->current_log_level = pmcraid_log_level;
5353 /* Setup variables required for reset engine */
5354 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5355 pinstance->reset_cmd = NULL;
5360 * pmcraid_shutdown - shutdown adapter controller.
5361 * @pdev: pci device struct
5363 * Issues an adapter shutdown to the card waits for its completion
5368 static void pmcraid_shutdown(struct pci_dev *pdev)
5370 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5371 pmcraid_reset_bringdown(pinstance);
5376 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5378 static unsigned short pmcraid_get_minor(void)
5382 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5383 __set_bit(minor, pmcraid_minor);
5388 * pmcraid_release_minor - releases given minor back to minor number bitmap
5390 static void pmcraid_release_minor(unsigned short minor)
5392 __clear_bit(minor, pmcraid_minor);
5396 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5398 * @pinstance: pointer to adapter instance for which to register device
5401 * 0 in case of success, otherwise non-zero
5403 static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5408 minor = pmcraid_get_minor();
5409 cdev_init(&pinstance->cdev, &pmcraid_fops);
5410 pinstance->cdev.owner = THIS_MODULE;
5412 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5415 pmcraid_release_minor(minor);
5417 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
5418 NULL, "%s%u", PMCRAID_DEVFILE, minor);
5423 * pmcraid_release_chrdev - unregisters per-adapter management interface
5425 * @pinstance: pointer to adapter instance structure
5430 static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5432 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5433 device_destroy(pmcraid_class,
5434 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5435 cdev_del(&pinstance->cdev);
5439 * pmcraid_remove - IOA hot plug remove entry point
5440 * @pdev: pci device struct
5445 static void __devexit pmcraid_remove(struct pci_dev *pdev)
5447 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5449 /* remove the management interface (/dev file) for this device */
5450 pmcraid_release_chrdev(pinstance);
5452 /* remove host template from scsi midlayer */
5453 scsi_remove_host(pinstance->host);
5455 /* block requests from mid-layer */
5456 scsi_block_requests(pinstance->host);
5458 /* initiate shutdown adapter */
5459 pmcraid_shutdown(pdev);
5461 pmcraid_disable_interrupts(pinstance, ~0);
5462 flush_work_sync(&pinstance->worker_q);
5464 pmcraid_kill_tasklets(pinstance);
5465 pmcraid_unregister_interrupt_handler(pinstance);
5466 pmcraid_release_buffers(pinstance);
5467 iounmap(pinstance->mapped_dma_addr);
5468 pci_release_regions(pdev);
5469 scsi_host_put(pinstance->host);
5470 pci_disable_device(pdev);
5477 * pmcraid_suspend - driver suspend entry point for power management
5478 * @pdev: PCI device structure
5479 * @state: PCI power state to suspend routine
5481 * Return Value - 0 always
5483 static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5485 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5487 pmcraid_shutdown(pdev);
5488 pmcraid_disable_interrupts(pinstance, ~0);
5489 pmcraid_kill_tasklets(pinstance);
5490 pci_set_drvdata(pinstance->pdev, pinstance);
5491 pmcraid_unregister_interrupt_handler(pinstance);
5492 pci_save_state(pdev);
5493 pci_disable_device(pdev);
5494 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5500 * pmcraid_resume - driver resume entry point PCI power management
5501 * @pdev: PCI device structure
5503 * Return Value - 0 in case of success. Error code in case of any failure
5505 static int pmcraid_resume(struct pci_dev *pdev)
5507 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5508 struct Scsi_Host *host = pinstance->host;
5511 pci_set_power_state(pdev, PCI_D0);
5512 pci_enable_wake(pdev, PCI_D0, 0);
5513 pci_restore_state(pdev);
5515 rc = pci_enable_device(pdev);
5518 dev_err(&pdev->dev, "resume: Enable device failed\n");
5522 pci_set_master(pdev);
5524 if ((sizeof(dma_addr_t) == 4) ||
5525 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5526 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5529 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5532 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
5533 goto disable_device;
5536 pmcraid_disable_interrupts(pinstance, ~0);
5537 atomic_set(&pinstance->outstanding_cmds, 0);
5538 rc = pmcraid_register_interrupt_handler(pinstance);
5542 "resume: couldn't register interrupt handlers\n");
5547 pmcraid_init_tasklets(pinstance);
5548 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5550 /* Start with hard reset sequence which brings up IOA to operational
5551 * state as well as completes the reset sequence.
5553 pinstance->ioa_hard_reset = 1;
5555 /* Start IOA firmware initialization and bring card to Operational
5558 if (pmcraid_reset_bringup(pinstance)) {
5559 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5561 goto release_tasklets;
5567 pmcraid_disable_interrupts(pinstance, ~0);
5568 pmcraid_kill_tasklets(pinstance);
5569 pmcraid_unregister_interrupt_handler(pinstance);
5572 scsi_host_put(host);
5575 pci_disable_device(pdev);
5582 #define pmcraid_suspend NULL
5583 #define pmcraid_resume NULL
5585 #endif /* CONFIG_PM */
5588 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5589 * completion of the ioa reset
5590 * @cmd: pointer to reset command block
5592 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5594 struct pmcraid_instance *pinstance = cmd->drv_inst;
5595 unsigned long flags;
5597 spin_lock_irqsave(pinstance->host->host_lock, flags);
5598 pmcraid_ioa_reset(cmd);
5599 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5600 scsi_unblock_requests(pinstance->host);
5601 schedule_work(&pinstance->worker_q);
5605 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5607 * @cmd: pointer to pmcraid_cmd structure
5610 * 0 for success or non-zero for failure cases
5612 static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5614 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5615 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5617 pmcraid_reinit_cmdblk(cmd);
5619 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5620 ioarcb->request_type = REQ_TYPE_IOACMD;
5621 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5622 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5624 /* If this was called as part of resource table reinitialization due to
5625 * lost CCN, it is enough to return the command block back to free pool
5626 * as part of set_supported_devs completion function.
5628 if (cmd->drv_inst->reinit_cfg_table) {
5629 cmd->drv_inst->reinit_cfg_table = 0;
5631 cmd_done = pmcraid_reinit_cfgtable_done;
5634 /* we will be done with the reset sequence after set supported devices,
5635 * setup the done function to return the command block back to free
5638 pmcraid_send_cmd(cmd,
5640 PMCRAID_SET_SUP_DEV_TIMEOUT,
5641 pmcraid_timeout_handler);
5646 * pmcraid_set_timestamp - set the timestamp to IOAFP
5648 * @cmd: pointer to pmcraid_cmd structure
5651 * 0 for success or non-zero for failure cases
5653 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5655 struct pmcraid_instance *pinstance = cmd->drv_inst;
5656 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5657 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5658 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5663 do_gettimeofday(&tv);
5664 timestamp = tv.tv_sec * 1000;
5666 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5667 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5668 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5669 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5670 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5671 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5673 pmcraid_reinit_cmdblk(cmd);
5674 ioarcb->request_type = REQ_TYPE_SCSI;
5675 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5676 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5677 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5678 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5680 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5681 offsetof(struct pmcraid_ioarcb,
5682 add_data.u.ioadl[0]));
5683 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5684 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5686 ioarcb->request_flags0 |= NO_LINK_DESCS;
5687 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5688 ioarcb->data_transfer_length =
5689 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5690 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5691 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5692 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5693 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5695 if (!pinstance->timestamp_error) {
5696 pinstance->timestamp_error = 0;
5697 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5698 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5700 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5701 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5708 * pmcraid_init_res_table - Initialize the resource table
5709 * @cmd: pointer to pmcraid command struct
5711 * This function looks through the existing resource table, comparing
5712 * it with the config table. This function will take care of old/new
5713 * devices and schedule adding/removing them from the mid-layer
5719 static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5721 struct pmcraid_instance *pinstance = cmd->drv_inst;
5722 struct pmcraid_resource_entry *res, *temp;
5723 struct pmcraid_config_table_entry *cfgte;
5724 unsigned long lock_flags;
5729 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5730 pmcraid_err("IOA requires microcode download\n");
5732 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5734 /* resource list is protected by pinstance->resource_lock.
5735 * init_res_table can be called from probe (user-thread) or runtime
5736 * reset (timer/tasklet)
5738 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5740 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5741 list_move_tail(&res->queue, &old_res);
5743 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
5744 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5745 PMCRAID_FW_VERSION_1)
5746 cfgte = &pinstance->cfg_table->entries[i];
5748 cfgte = (struct pmcraid_config_table_entry *)
5749 &pinstance->cfg_table->entries_ext[i];
5751 if (!pmcraid_expose_resource(fw_version, cfgte))
5756 /* If this entry was already detected and initialized */
5757 list_for_each_entry_safe(res, temp, &old_res, queue) {
5759 rc = memcmp(&res->cfg_entry.resource_address,
5760 &cfgte->resource_address,
5761 sizeof(cfgte->resource_address));
5763 list_move_tail(&res->queue,
5764 &pinstance->used_res_q);
5770 /* If this is new entry, initialize it and add it the queue */
5773 if (list_empty(&pinstance->free_res_q)) {
5774 pmcraid_err("Too many devices attached\n");
5779 res = list_entry(pinstance->free_res_q.next,
5780 struct pmcraid_resource_entry, queue);
5782 res->scsi_dev = NULL;
5783 res->change_detected = RES_CHANGE_ADD;
5784 res->reset_progress = 0;
5785 list_move_tail(&res->queue, &pinstance->used_res_q);
5788 /* copy new configuration table entry details into driver
5789 * maintained resource entry
5792 memcpy(&res->cfg_entry, cfgte,
5793 pinstance->config_table_entry_size);
5794 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5795 res->cfg_entry.resource_type,
5796 (fw_version <= PMCRAID_FW_VERSION_1 ?
5797 res->cfg_entry.unique_flags1 :
5798 res->cfg_entry.array_id & 0xFF),
5799 le32_to_cpu(res->cfg_entry.resource_address));
5803 /* Detect any deleted entries, mark them for deletion from mid-layer */
5804 list_for_each_entry_safe(res, temp, &old_res, queue) {
5806 if (res->scsi_dev) {
5807 res->change_detected = RES_CHANGE_DEL;
5808 res->cfg_entry.resource_handle =
5809 PMCRAID_INVALID_RES_HANDLE;
5810 list_move_tail(&res->queue, &pinstance->used_res_q);
5812 list_move_tail(&res->queue, &pinstance->free_res_q);
5816 /* release the resource list lock */
5817 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5818 pmcraid_set_timestamp(cmd);
5822 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5823 * @cmd: pointer pmcraid_cmd struct
5825 * This function sends a Query IOA Configuration command to the adapter to
5826 * retrieve the IOA configuration table.
5831 static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5833 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5834 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5835 struct pmcraid_instance *pinstance = cmd->drv_inst;
5836 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5838 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5839 PMCRAID_FW_VERSION_1)
5840 pinstance->config_table_entry_size =
5841 sizeof(struct pmcraid_config_table_entry);
5843 pinstance->config_table_entry_size =
5844 sizeof(struct pmcraid_config_table_entry_ext);
5846 ioarcb->request_type = REQ_TYPE_IOACMD;
5847 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5849 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5851 /* firmware requires 4-byte length field, specified in B.E format */
5852 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5854 /* Since entire config table can be described by single IOADL, it can
5855 * be part of IOARCB itself
5857 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5858 offsetof(struct pmcraid_ioarcb,
5859 add_data.u.ioadl[0]));
5860 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5861 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5863 ioarcb->request_flags0 |= NO_LINK_DESCS;
5864 ioarcb->data_transfer_length =
5865 cpu_to_le32(sizeof(struct pmcraid_config_table));
5867 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5868 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5869 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5870 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5872 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5873 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5878 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5879 * @pdev: pointer to pci device structure
5880 * @dev_id: pointer to device ids structure
5883 * returns 0 if the device is claimed and successfully configured.
5884 * returns non-zero error code in case of any failure
5886 static int __devinit pmcraid_probe(
5887 struct pci_dev *pdev,
5888 const struct pci_device_id *dev_id
5891 struct pmcraid_instance *pinstance;
5892 struct Scsi_Host *host;
5893 void __iomem *mapped_pci_addr;
5894 int rc = PCIBIOS_SUCCESSFUL;
5896 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5898 ("maximum number(%d) of supported adapters reached\n",
5899 atomic_read(&pmcraid_adapter_count));
5903 atomic_inc(&pmcraid_adapter_count);
5904 rc = pci_enable_device(pdev);
5907 dev_err(&pdev->dev, "Cannot enable adapter\n");
5908 atomic_dec(&pmcraid_adapter_count);
5912 dev_info(&pdev->dev,
5913 "Found new IOA(%x:%x), Total IOA count: %d\n",
5914 pdev->vendor, pdev->device,
5915 atomic_read(&pmcraid_adapter_count));
5917 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5921 "Couldn't register memory range of registers\n");
5922 goto out_disable_device;
5925 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5927 if (!mapped_pci_addr) {
5928 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5930 goto out_release_regions;
5933 pci_set_master(pdev);
5935 /* Firmware requires the system bus address of IOARCB to be within
5936 * 32-bit addressable range though it has 64-bit IOARRIN register.
5937 * However, firmware supports 64-bit streaming DMA buffers, whereas
5938 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5939 * returns memory within 4GB (if not, change this logic), coherent
5940 * buffers are within firmware acceptable address ranges.
5942 if ((sizeof(dma_addr_t) == 4) ||
5943 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5944 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5946 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5947 * bit mask for pci_alloc_consistent to return addresses within 4GB
5950 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5953 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5957 host = scsi_host_alloc(&pmcraid_host_template,
5958 sizeof(struct pmcraid_instance));
5961 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5966 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5967 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5968 host->unique_id = host->host_no;
5969 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5970 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5972 /* zero out entire instance structure */
5973 pinstance = (struct pmcraid_instance *)host->hostdata;
5974 memset(pinstance, 0, sizeof(*pinstance));
5976 pinstance->chip_cfg =
5977 (struct pmcraid_chip_details *)(dev_id->driver_data);
5979 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5982 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5983 goto out_scsi_host_put;
5986 pci_set_drvdata(pdev, pinstance);
5988 /* Save PCI config-space for use following the reset */
5989 rc = pci_save_state(pinstance->pdev);
5992 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5993 goto out_scsi_host_put;
5996 pmcraid_disable_interrupts(pinstance, ~0);
5998 rc = pmcraid_register_interrupt_handler(pinstance);
6001 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
6002 goto out_scsi_host_put;
6005 pmcraid_init_tasklets(pinstance);
6007 /* allocate verious buffers used by LLD.*/
6008 rc = pmcraid_init_buffers(pinstance);
6011 pmcraid_err("couldn't allocate memory blocks\n");
6012 goto out_unregister_isr;
6015 /* check the reset type required */
6016 pmcraid_reset_type(pinstance);
6018 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
6020 /* Start IOA firmware initialization and bring card to Operational
6023 pmcraid_info("starting IOA initialization sequence\n");
6024 if (pmcraid_reset_bringup(pinstance)) {
6025 dev_err(&pdev->dev, "couldn't initialize IOA\n");
6027 goto out_release_bufs;
6030 /* Add adapter instance into mid-layer list */
6031 rc = scsi_add_host(pinstance->host, &pdev->dev);
6033 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
6034 goto out_release_bufs;
6037 scsi_scan_host(pinstance->host);
6039 rc = pmcraid_setup_chrdev(pinstance);
6042 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6044 goto out_remove_host;
6047 /* Schedule worker thread to handle CCN and take care of adding and
6048 * removing devices to OS
6050 atomic_set(&pinstance->expose_resources, 1);
6051 schedule_work(&pinstance->worker_q);
6055 scsi_remove_host(host);
6058 pmcraid_release_buffers(pinstance);
6061 pmcraid_kill_tasklets(pinstance);
6062 pmcraid_unregister_interrupt_handler(pinstance);
6065 scsi_host_put(host);
6068 iounmap(mapped_pci_addr);
6070 out_release_regions:
6071 pci_release_regions(pdev);
6074 atomic_dec(&pmcraid_adapter_count);
6075 pci_set_drvdata(pdev, NULL);
6076 pci_disable_device(pdev);
6081 * PCI driver structure of pcmraid driver
6083 static struct pci_driver pmcraid_driver = {
6084 .name = PMCRAID_DRIVER_NAME,
6085 .id_table = pmcraid_pci_table,
6086 .probe = pmcraid_probe,
6087 .remove = pmcraid_remove,
6088 .suspend = pmcraid_suspend,
6089 .resume = pmcraid_resume,
6090 .shutdown = pmcraid_shutdown
6094 * pmcraid_init - module load entry point
6096 static int __init pmcraid_init(void)
6101 pmcraid_info("%s Device Driver version: %s\n",
6102 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
6104 error = alloc_chrdev_region(&dev, 0,
6105 PMCRAID_MAX_ADAPTERS,
6109 pmcraid_err("failed to get a major number for adapters\n");
6113 pmcraid_major = MAJOR(dev);
6114 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6116 if (IS_ERR(pmcraid_class)) {
6117 error = PTR_ERR(pmcraid_class);
6118 pmcraid_err("failed to register with with sysfs, error = %x\n",
6120 goto out_unreg_chrdev;
6123 error = pmcraid_netlink_init();
6126 goto out_unreg_chrdev;
6128 error = pci_register_driver(&pmcraid_driver);
6133 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6135 class_destroy(pmcraid_class);
6136 pmcraid_netlink_release();
6139 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
6146 * pmcraid_exit - module unload entry point
6148 static void __exit pmcraid_exit(void)
6150 pmcraid_netlink_release();
6151 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6152 PMCRAID_MAX_ADAPTERS);
6153 pci_unregister_driver(&pmcraid_driver);
6154 class_destroy(pmcraid_class);
6157 module_init(pmcraid_init);
6158 module_exit(pmcraid_exit);