3 * Linux MegaRAID driver for SAS based RAID controllers
5 * Copyright (c) 2003-2005 LSI Logic Corporation.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
12 * FILE : megaraid_sas.c
13 * Version : v00.00.02.00-rc4
16 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
17 * Sumant Patro <Sumant.Patro@lsil.com>
19 * List of supported controllers
21 * OEM Product Name VID DID SSVID SSID
22 * --- ------------ --- --- ---- ----
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/pci.h>
28 #include <linux/list.h>
29 #include <linux/moduleparam.h>
30 #include <linux/module.h>
31 #include <linux/spinlock.h>
32 #include <linux/interrupt.h>
33 #include <linux/delay.h>
34 #include <linux/uio.h>
35 #include <asm/uaccess.h>
37 #include <linux/compat.h>
38 #include <linux/mutex.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_host.h>
44 #include "megaraid_sas.h"
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(MEGASAS_VERSION
);
48 MODULE_AUTHOR("sreenivas.bagalkote@lsil.com");
49 MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
52 * PCI ID table for all supported controllers
54 static struct pci_device_id megasas_pci_table
[] = {
57 PCI_VENDOR_ID_LSI_LOGIC
,
58 PCI_DEVICE_ID_LSI_SAS1064R
,
64 PCI_DEVICE_ID_DELL_PERC5
,
68 {0} /* Terminating entry */
71 MODULE_DEVICE_TABLE(pci
, megasas_pci_table
);
73 static int megasas_mgmt_majorno
;
74 static struct megasas_mgmt_info megasas_mgmt_info
;
75 static struct fasync_struct
*megasas_async_queue
;
76 static DEFINE_MUTEX(megasas_async_queue_mutex
);
79 * megasas_get_cmd - Get a command from the free pool
80 * @instance: Adapter soft state
82 * Returns a free command from the pool
84 static inline struct megasas_cmd
*megasas_get_cmd(struct megasas_instance
88 struct megasas_cmd
*cmd
= NULL
;
90 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
92 if (!list_empty(&instance
->cmd_pool
)) {
93 cmd
= list_entry((&instance
->cmd_pool
)->next
,
94 struct megasas_cmd
, list
);
95 list_del_init(&cmd
->list
);
97 printk(KERN_ERR
"megasas: Command pool empty!\n");
100 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
105 * megasas_return_cmd - Return a cmd to free command pool
106 * @instance: Adapter soft state
107 * @cmd: Command packet to be returned to free command pool
110 megasas_return_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
114 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
117 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
119 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
123 * megasas_enable_intr - Enables interrupts
124 * @regs: MFI register set
127 megasas_enable_intr(struct megasas_register_set __iomem
* regs
)
129 writel(1, &(regs
)->outbound_intr_mask
);
131 /* Dummy readl to force pci flush */
132 readl(®s
->outbound_intr_mask
);
136 * megasas_disable_intr - Disables interrupts
137 * @regs: MFI register set
140 megasas_disable_intr(struct megasas_register_set __iomem
* regs
)
142 u32 mask
= readl(®s
->outbound_intr_mask
) & (~0x00000001);
143 writel(mask
, ®s
->outbound_intr_mask
);
145 /* Dummy readl to force pci flush */
146 readl(®s
->outbound_intr_mask
);
150 * megasas_issue_polled - Issues a polling command
151 * @instance: Adapter soft state
152 * @cmd: Command packet to be issued
154 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
157 megasas_issue_polled(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
160 u32 msecs
= MFI_POLL_TIMEOUT_SECS
* 1000;
162 struct megasas_header
*frame_hdr
= &cmd
->frame
->hdr
;
164 frame_hdr
->cmd_status
= 0xFF;
165 frame_hdr
->flags
|= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE
;
168 * Issue the frame using inbound queue port
170 writel(cmd
->frame_phys_addr
>> 3,
171 &instance
->reg_set
->inbound_queue_port
);
174 * Wait for cmd_status to change
176 for (i
= 0; (i
< msecs
) && (frame_hdr
->cmd_status
== 0xff); i
++) {
181 if (frame_hdr
->cmd_status
== 0xff)
188 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
189 * @instance: Adapter soft state
190 * @cmd: Command to be issued
192 * This function waits on an event for the command to be returned from ISR.
193 * Used to issue ioctl commands.
196 megasas_issue_blocked_cmd(struct megasas_instance
*instance
,
197 struct megasas_cmd
*cmd
)
199 cmd
->cmd_status
= ENODATA
;
201 writel(cmd
->frame_phys_addr
>> 3,
202 &instance
->reg_set
->inbound_queue_port
);
204 wait_event(instance
->int_cmd_wait_q
, (cmd
->cmd_status
!= ENODATA
));
210 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
211 * @instance: Adapter soft state
212 * @cmd_to_abort: Previously issued cmd to be aborted
214 * MFI firmware can abort previously issued AEN comamnd (automatic event
215 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
216 * cmd and blocks till it is completed.
219 megasas_issue_blocked_abort_cmd(struct megasas_instance
*instance
,
220 struct megasas_cmd
*cmd_to_abort
)
222 struct megasas_cmd
*cmd
;
223 struct megasas_abort_frame
*abort_fr
;
225 cmd
= megasas_get_cmd(instance
);
230 abort_fr
= &cmd
->frame
->abort
;
233 * Prepare and issue the abort frame
235 abort_fr
->cmd
= MFI_CMD_ABORT
;
236 abort_fr
->cmd_status
= 0xFF;
238 abort_fr
->abort_context
= cmd_to_abort
->index
;
239 abort_fr
->abort_mfi_phys_addr_lo
= cmd_to_abort
->frame_phys_addr
;
240 abort_fr
->abort_mfi_phys_addr_hi
= 0;
243 cmd
->cmd_status
= 0xFF;
245 writel(cmd
->frame_phys_addr
>> 3,
246 &instance
->reg_set
->inbound_queue_port
);
249 * Wait for this cmd to complete
251 wait_event(instance
->abort_cmd_wait_q
, (cmd
->cmd_status
!= 0xFF));
253 megasas_return_cmd(instance
, cmd
);
258 * megasas_make_sgl32 - Prepares 32-bit SGL
259 * @instance: Adapter soft state
260 * @scp: SCSI command from the mid-layer
261 * @mfi_sgl: SGL to be filled in
263 * If successful, this function returns the number of SG elements. Otherwise,
267 megasas_make_sgl32(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
268 union megasas_sgl
*mfi_sgl
)
272 struct scatterlist
*os_sgl
;
275 * Return 0 if there is no data transfer
277 if (!scp
->request_buffer
|| !scp
->request_bufflen
)
281 mfi_sgl
->sge32
[0].phys_addr
= pci_map_single(instance
->pdev
,
288 mfi_sgl
->sge32
[0].length
= scp
->request_bufflen
;
293 os_sgl
= (struct scatterlist
*)scp
->request_buffer
;
294 sge_count
= pci_map_sg(instance
->pdev
, os_sgl
, scp
->use_sg
,
295 scp
->sc_data_direction
);
297 for (i
= 0; i
< sge_count
; i
++, os_sgl
++) {
298 mfi_sgl
->sge32
[i
].length
= sg_dma_len(os_sgl
);
299 mfi_sgl
->sge32
[i
].phys_addr
= sg_dma_address(os_sgl
);
306 * megasas_make_sgl64 - Prepares 64-bit SGL
307 * @instance: Adapter soft state
308 * @scp: SCSI command from the mid-layer
309 * @mfi_sgl: SGL to be filled in
311 * If successful, this function returns the number of SG elements. Otherwise,
315 megasas_make_sgl64(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
316 union megasas_sgl
*mfi_sgl
)
320 struct scatterlist
*os_sgl
;
323 * Return 0 if there is no data transfer
325 if (!scp
->request_buffer
|| !scp
->request_bufflen
)
329 mfi_sgl
->sge64
[0].phys_addr
= pci_map_single(instance
->pdev
,
337 mfi_sgl
->sge64
[0].length
= scp
->request_bufflen
;
342 os_sgl
= (struct scatterlist
*)scp
->request_buffer
;
343 sge_count
= pci_map_sg(instance
->pdev
, os_sgl
, scp
->use_sg
,
344 scp
->sc_data_direction
);
346 for (i
= 0; i
< sge_count
; i
++, os_sgl
++) {
347 mfi_sgl
->sge64
[i
].length
= sg_dma_len(os_sgl
);
348 mfi_sgl
->sge64
[i
].phys_addr
= sg_dma_address(os_sgl
);
355 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
356 * @instance: Adapter soft state
358 * @cmd: Command to be prepared in
360 * This function prepares CDB commands. These are typcially pass-through
361 * commands to the devices.
364 megasas_build_dcdb(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
365 struct megasas_cmd
*cmd
)
372 struct megasas_pthru_frame
*pthru
;
374 is_logical
= MEGASAS_IS_LOGICAL(scp
);
375 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
376 pthru
= (struct megasas_pthru_frame
*)cmd
->frame
;
378 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
379 flags
= MFI_FRAME_DIR_WRITE
;
380 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
381 flags
= MFI_FRAME_DIR_READ
;
382 else if (scp
->sc_data_direction
== PCI_DMA_NONE
)
383 flags
= MFI_FRAME_DIR_NONE
;
386 * Prepare the DCDB frame
388 pthru
->cmd
= (is_logical
) ? MFI_CMD_LD_SCSI_IO
: MFI_CMD_PD_SCSI_IO
;
389 pthru
->cmd_status
= 0x0;
390 pthru
->scsi_status
= 0x0;
391 pthru
->target_id
= device_id
;
392 pthru
->lun
= scp
->device
->lun
;
393 pthru
->cdb_len
= scp
->cmd_len
;
395 pthru
->flags
= flags
;
396 pthru
->data_xfer_len
= scp
->request_bufflen
;
398 memcpy(pthru
->cdb
, scp
->cmnd
, scp
->cmd_len
);
403 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
404 sizeof(struct megasas_sge32
);
407 pthru
->flags
|= MFI_FRAME_SGL64
;
408 pthru
->sge_count
= megasas_make_sgl64(instance
, scp
,
411 pthru
->sge_count
= megasas_make_sgl32(instance
, scp
,
415 * Sense info specific
417 pthru
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
418 pthru
->sense_buf_phys_addr_hi
= 0;
419 pthru
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
421 sge_bytes
= sge_sz
* pthru
->sge_count
;
424 * Compute the total number of frames this command consumes. FW uses
425 * this number to pull sufficient number of frames from host memory.
427 cmd
->frame_count
= (sge_bytes
/ MEGAMFI_FRAME_SIZE
) +
428 ((sge_bytes
% MEGAMFI_FRAME_SIZE
) ? 1 : 0) + 1;
430 if (cmd
->frame_count
> 7)
431 cmd
->frame_count
= 8;
433 return cmd
->frame_count
;
437 * megasas_build_ldio - Prepares IOs to logical devices
438 * @instance: Adapter soft state
440 * @cmd: Command to to be prepared
442 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
445 megasas_build_ldio(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
446 struct megasas_cmd
*cmd
)
451 u8 sc
= scp
->cmnd
[0];
453 struct megasas_io_frame
*ldio
;
455 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
456 ldio
= (struct megasas_io_frame
*)cmd
->frame
;
458 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
459 flags
= MFI_FRAME_DIR_WRITE
;
460 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
461 flags
= MFI_FRAME_DIR_READ
;
464 * Preare the Logical IO frame: 2nd bit is zero for all read cmds
466 ldio
->cmd
= (sc
& 0x02) ? MFI_CMD_LD_WRITE
: MFI_CMD_LD_READ
;
467 ldio
->cmd_status
= 0x0;
468 ldio
->scsi_status
= 0x0;
469 ldio
->target_id
= device_id
;
471 ldio
->reserved_0
= 0;
474 ldio
->start_lba_hi
= 0;
475 ldio
->access_byte
= (scp
->cmd_len
!= 6) ? scp
->cmnd
[1] : 0;
478 * 6-byte READ(0x08) or WRITE(0x0A) cdb
480 if (scp
->cmd_len
== 6) {
481 ldio
->lba_count
= (u32
) scp
->cmnd
[4];
482 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[1] << 16) |
483 ((u32
) scp
->cmnd
[2] << 8) | (u32
) scp
->cmnd
[3];
485 ldio
->start_lba_lo
&= 0x1FFFFF;
489 * 10-byte READ(0x28) or WRITE(0x2A) cdb
491 else if (scp
->cmd_len
== 10) {
492 ldio
->lba_count
= (u32
) scp
->cmnd
[8] |
493 ((u32
) scp
->cmnd
[7] << 8);
494 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
495 ((u32
) scp
->cmnd
[3] << 16) |
496 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
500 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
502 else if (scp
->cmd_len
== 12) {
503 ldio
->lba_count
= ((u32
) scp
->cmnd
[6] << 24) |
504 ((u32
) scp
->cmnd
[7] << 16) |
505 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
507 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
508 ((u32
) scp
->cmnd
[3] << 16) |
509 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
513 * 16-byte READ(0x88) or WRITE(0x8A) cdb
515 else if (scp
->cmd_len
== 16) {
516 ldio
->lba_count
= ((u32
) scp
->cmnd
[10] << 24) |
517 ((u32
) scp
->cmnd
[11] << 16) |
518 ((u32
) scp
->cmnd
[12] << 8) | (u32
) scp
->cmnd
[13];
520 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[6] << 24) |
521 ((u32
) scp
->cmnd
[7] << 16) |
522 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
524 ldio
->start_lba_hi
= ((u32
) scp
->cmnd
[2] << 24) |
525 ((u32
) scp
->cmnd
[3] << 16) |
526 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
533 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
534 sizeof(struct megasas_sge32
);
537 ldio
->flags
|= MFI_FRAME_SGL64
;
538 ldio
->sge_count
= megasas_make_sgl64(instance
, scp
, &ldio
->sgl
);
540 ldio
->sge_count
= megasas_make_sgl32(instance
, scp
, &ldio
->sgl
);
543 * Sense info specific
545 ldio
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
546 ldio
->sense_buf_phys_addr_hi
= 0;
547 ldio
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
549 sge_bytes
= sge_sz
* ldio
->sge_count
;
551 cmd
->frame_count
= (sge_bytes
/ MEGAMFI_FRAME_SIZE
) +
552 ((sge_bytes
% MEGAMFI_FRAME_SIZE
) ? 1 : 0) + 1;
554 if (cmd
->frame_count
> 7)
555 cmd
->frame_count
= 8;
557 return cmd
->frame_count
;
561 * megasas_build_cmd - Prepares a command packet
562 * @instance: Adapter soft state
564 * @frame_count: [OUT] Number of frames used to prepare this command
566 static inline struct megasas_cmd
*megasas_build_cmd(struct megasas_instance
568 struct scsi_cmnd
*scp
,
572 struct megasas_cmd
*cmd
;
575 * Find out if this is logical or physical drive command.
577 logical_cmd
= MEGASAS_IS_LOGICAL(scp
);
580 * Logical drive command
584 if (scp
->device
->id
>= MEGASAS_MAX_LD
) {
585 scp
->result
= DID_BAD_TARGET
<< 16;
589 switch (scp
->cmnd
[0]) {
602 if (scp
->device
->lun
) {
603 scp
->result
= DID_BAD_TARGET
<< 16;
607 cmd
= megasas_get_cmd(instance
);
610 scp
->result
= DID_IMM_RETRY
<< 16;
614 *frame_count
= megasas_build_ldio(instance
, scp
, cmd
);
616 if (!(*frame_count
)) {
617 megasas_return_cmd(instance
, cmd
);
627 if (scp
->device
->lun
) {
628 scp
->result
= DID_BAD_TARGET
<< 16;
632 cmd
= megasas_get_cmd(instance
);
635 scp
->result
= DID_IMM_RETRY
<< 16;
639 *frame_count
= megasas_build_dcdb(instance
, scp
, cmd
);
641 if (!(*frame_count
)) {
642 megasas_return_cmd(instance
, cmd
);
649 cmd
= megasas_get_cmd(instance
);
652 scp
->result
= DID_IMM_RETRY
<< 16;
656 *frame_count
= megasas_build_dcdb(instance
, scp
, cmd
);
658 if (!(*frame_count
)) {
659 megasas_return_cmd(instance
, cmd
);
670 * megasas_queue_command - Queue entry point
671 * @scmd: SCSI command to be queued
672 * @done: Callback entry point
675 megasas_queue_command(struct scsi_cmnd
*scmd
, void (*done
) (struct scsi_cmnd
*))
679 struct megasas_cmd
*cmd
;
680 struct megasas_instance
*instance
;
682 instance
= (struct megasas_instance
*)
683 scmd
->device
->host
->hostdata
;
684 scmd
->scsi_done
= done
;
687 cmd
= megasas_build_cmd(instance
, scmd
, &frame_count
);
695 scmd
->SCp
.ptr
= (char *)cmd
;
696 scmd
->SCp
.sent_command
= jiffies
;
699 * Issue the command to the FW
701 spin_lock_irqsave(&instance
->instance_lock
, flags
);
702 instance
->fw_outstanding
++;
703 spin_unlock_irqrestore(&instance
->instance_lock
, flags
);
705 writel(((cmd
->frame_phys_addr
>> 3) | (cmd
->frame_count
- 1)),
706 &instance
->reg_set
->inbound_queue_port
);
712 * megasas_wait_for_outstanding - Wait for all outstanding cmds
713 * @instance: Adapter soft state
715 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
716 * complete all its outstanding commands. Returns error if one or more IOs
717 * are pending after this time period. It also marks the controller dead.
719 static int megasas_wait_for_outstanding(struct megasas_instance
*instance
)
722 u32 wait_time
= MEGASAS_RESET_WAIT_TIME
;
724 for (i
= 0; i
< wait_time
; i
++) {
726 if (!instance
->fw_outstanding
)
729 if (!(i
% MEGASAS_RESET_NOTICE_INTERVAL
)) {
730 printk(KERN_NOTICE
"megasas: [%2d]waiting for %d "
731 "commands to complete\n", i
,
732 instance
->fw_outstanding
);
738 if (instance
->fw_outstanding
) {
739 instance
->hw_crit_error
= 1;
747 * megasas_generic_reset - Generic reset routine
748 * @scmd: Mid-layer SCSI command
750 * This routine implements a generic reset handler for device, bus and host
751 * reset requests. Device, bus and host specific reset handlers can use this
752 * function after they do their specific tasks.
754 static int megasas_generic_reset(struct scsi_cmnd
*scmd
)
757 struct megasas_instance
*instance
;
759 instance
= (struct megasas_instance
*)scmd
->device
->host
->hostdata
;
761 scmd_printk(KERN_NOTICE
, scmd
, "megasas: RESET -%ld cmd=%x\n",
762 scmd
->serial_number
, scmd
->cmnd
[0]);
764 if (instance
->hw_crit_error
) {
765 printk(KERN_ERR
"megasas: cannot recover from previous reset "
770 ret_val
= megasas_wait_for_outstanding(instance
);
771 if (ret_val
== SUCCESS
)
772 printk(KERN_NOTICE
"megasas: reset successful \n");
774 printk(KERN_ERR
"megasas: failed to do reset\n");
779 static enum scsi_eh_timer_return
megasas_reset_timer(struct scsi_cmnd
*scmd
)
781 unsigned long seconds
;
784 seconds
= (jiffies
- scmd
->SCp
.sent_command
) / HZ
;
787 return EH_RESET_TIMER
;
789 return EH_NOT_HANDLED
;
797 * megasas_reset_device - Device reset handler entry point
799 static int megasas_reset_device(struct scsi_cmnd
*scmd
)
804 * First wait for all commands to complete
806 ret
= megasas_generic_reset(scmd
);
812 * megasas_reset_bus_host - Bus & host reset handler entry point
814 static int megasas_reset_bus_host(struct scsi_cmnd
*scmd
)
819 * Frist wait for all commands to complete
821 ret
= megasas_generic_reset(scmd
);
827 * megasas_service_aen - Processes an event notification
828 * @instance: Adapter soft state
829 * @cmd: AEN command completed by the ISR
831 * For AEN, driver sends a command down to FW that is held by the FW till an
832 * event occurs. When an event of interest occurs, FW completes the command
833 * that it was previously holding.
835 * This routines sends SIGIO signal to processes that have registered with the
839 megasas_service_aen(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
842 * Don't signal app if it is just an aborted previously registered aen
845 kill_fasync(&megasas_async_queue
, SIGIO
, POLL_IN
);
849 instance
->aen_cmd
= NULL
;
850 megasas_return_cmd(instance
, cmd
);
854 * Scsi host template for megaraid_sas driver
856 static struct scsi_host_template megasas_template
= {
858 .module
= THIS_MODULE
,
859 .name
= "LSI Logic SAS based MegaRAID driver",
860 .proc_name
= "megaraid_sas",
861 .queuecommand
= megasas_queue_command
,
862 .eh_device_reset_handler
= megasas_reset_device
,
863 .eh_bus_reset_handler
= megasas_reset_bus_host
,
864 .eh_host_reset_handler
= megasas_reset_bus_host
,
865 .eh_timed_out
= megasas_reset_timer
,
866 .use_clustering
= ENABLE_CLUSTERING
,
870 * megasas_complete_int_cmd - Completes an internal command
871 * @instance: Adapter soft state
872 * @cmd: Command to be completed
874 * The megasas_issue_blocked_cmd() function waits for a command to complete
875 * after it issues a command. This function wakes up that waiting routine by
876 * calling wake_up() on the wait queue.
879 megasas_complete_int_cmd(struct megasas_instance
*instance
,
880 struct megasas_cmd
*cmd
)
882 cmd
->cmd_status
= cmd
->frame
->io
.cmd_status
;
884 if (cmd
->cmd_status
== ENODATA
) {
887 wake_up(&instance
->int_cmd_wait_q
);
891 * megasas_complete_abort - Completes aborting a command
892 * @instance: Adapter soft state
893 * @cmd: Cmd that was issued to abort another cmd
895 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
896 * after it issues an abort on a previously issued command. This function
897 * wakes up all functions waiting on the same wait queue.
900 megasas_complete_abort(struct megasas_instance
*instance
,
901 struct megasas_cmd
*cmd
)
906 wake_up(&instance
->abort_cmd_wait_q
);
913 * megasas_unmap_sgbuf - Unmap SG buffers
914 * @instance: Adapter soft state
915 * @cmd: Completed command
918 megasas_unmap_sgbuf(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
923 if (cmd
->scmd
->use_sg
) {
924 pci_unmap_sg(instance
->pdev
, cmd
->scmd
->request_buffer
,
925 cmd
->scmd
->use_sg
, cmd
->scmd
->sc_data_direction
);
929 if (!cmd
->scmd
->request_bufflen
)
932 opcode
= cmd
->frame
->hdr
.cmd
;
934 if ((opcode
== MFI_CMD_LD_READ
) || (opcode
== MFI_CMD_LD_WRITE
)) {
936 buf_h
= cmd
->frame
->io
.sgl
.sge64
[0].phys_addr
;
938 buf_h
= cmd
->frame
->io
.sgl
.sge32
[0].phys_addr
;
941 buf_h
= cmd
->frame
->pthru
.sgl
.sge64
[0].phys_addr
;
943 buf_h
= cmd
->frame
->pthru
.sgl
.sge32
[0].phys_addr
;
946 pci_unmap_single(instance
->pdev
, buf_h
, cmd
->scmd
->request_bufflen
,
947 cmd
->scmd
->sc_data_direction
);
952 * megasas_complete_cmd - Completes a command
953 * @instance: Adapter soft state
954 * @cmd: Command to be completed
955 * @alt_status: If non-zero, use this value as status to
956 * SCSI mid-layer instead of the value returned
957 * by the FW. This should be used if caller wants
958 * an alternate status (as in the case of aborted
962 megasas_complete_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
,
966 struct megasas_header
*hdr
= &cmd
->frame
->hdr
;
970 cmd
->scmd
->SCp
.ptr
= (char *)0;
975 case MFI_CMD_PD_SCSI_IO
:
976 case MFI_CMD_LD_SCSI_IO
:
979 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
980 * issued either through an IO path or an IOCTL path. If it
981 * was via IOCTL, we will send it to internal completion.
985 megasas_complete_int_cmd(instance
, cmd
);
990 * Don't export physical disk devices to mid-layer.
992 if (!MEGASAS_IS_LOGICAL(cmd
->scmd
) &&
993 (hdr
->cmd_status
== MFI_STAT_OK
) &&
994 (cmd
->scmd
->cmnd
[0] == INQUIRY
)) {
996 if (((*(u8
*) cmd
->scmd
->request_buffer
) & 0x1F) ==
998 cmd
->scmd
->result
= DID_BAD_TARGET
<< 16;
1003 case MFI_CMD_LD_READ
:
1004 case MFI_CMD_LD_WRITE
:
1007 cmd
->scmd
->result
= alt_status
<< 16;
1013 spin_lock_irqsave(&instance
->instance_lock
, flags
);
1014 instance
->fw_outstanding
--;
1015 spin_unlock_irqrestore(&instance
->instance_lock
, flags
);
1017 megasas_unmap_sgbuf(instance
, cmd
);
1018 cmd
->scmd
->scsi_done(cmd
->scmd
);
1019 megasas_return_cmd(instance
, cmd
);
1024 switch (hdr
->cmd_status
) {
1027 cmd
->scmd
->result
= DID_OK
<< 16;
1030 case MFI_STAT_SCSI_IO_FAILED
:
1031 case MFI_STAT_LD_INIT_IN_PROGRESS
:
1033 (DID_ERROR
<< 16) | hdr
->scsi_status
;
1036 case MFI_STAT_SCSI_DONE_WITH_ERROR
:
1038 cmd
->scmd
->result
= (DID_OK
<< 16) | hdr
->scsi_status
;
1040 if (hdr
->scsi_status
== SAM_STAT_CHECK_CONDITION
) {
1041 memset(cmd
->scmd
->sense_buffer
, 0,
1042 SCSI_SENSE_BUFFERSIZE
);
1043 memcpy(cmd
->scmd
->sense_buffer
, cmd
->sense
,
1046 cmd
->scmd
->result
|= DRIVER_SENSE
<< 24;
1051 case MFI_STAT_LD_OFFLINE
:
1052 case MFI_STAT_DEVICE_NOT_FOUND
:
1053 cmd
->scmd
->result
= DID_BAD_TARGET
<< 16;
1057 printk(KERN_DEBUG
"megasas: MFI FW status %#x\n",
1059 cmd
->scmd
->result
= DID_ERROR
<< 16;
1063 spin_lock_irqsave(&instance
->instance_lock
, flags
);
1064 instance
->fw_outstanding
--;
1065 spin_unlock_irqrestore(&instance
->instance_lock
, flags
);
1067 megasas_unmap_sgbuf(instance
, cmd
);
1068 cmd
->scmd
->scsi_done(cmd
->scmd
);
1069 megasas_return_cmd(instance
, cmd
);
1078 * See if got an event notification
1080 if (cmd
->frame
->dcmd
.opcode
== MR_DCMD_CTRL_EVENT_WAIT
)
1081 megasas_service_aen(instance
, cmd
);
1083 megasas_complete_int_cmd(instance
, cmd
);
1089 * Cmd issued to abort another cmd returned
1091 megasas_complete_abort(instance
, cmd
);
1095 printk("megasas: Unknown command completed! [0x%X]\n",
1102 * megasas_deplete_reply_queue - Processes all completed commands
1103 * @instance: Adapter soft state
1104 * @alt_status: Alternate status to be returned to
1105 * SCSI mid-layer instead of the status
1106 * returned by the FW
1109 megasas_deplete_reply_queue(struct megasas_instance
*instance
, u8 alt_status
)
1115 struct megasas_cmd
*cmd
;
1118 * Check if it is our interrupt
1120 status
= readl(&instance
->reg_set
->outbound_intr_status
);
1122 if (!(status
& MFI_OB_INTR_STATUS_MASK
)) {
1127 * Clear the interrupt by writing back the same value
1129 writel(status
, &instance
->reg_set
->outbound_intr_status
);
1131 producer
= *instance
->producer
;
1132 consumer
= *instance
->consumer
;
1134 while (consumer
!= producer
) {
1135 context
= instance
->reply_queue
[consumer
];
1137 cmd
= instance
->cmd_list
[context
];
1139 megasas_complete_cmd(instance
, cmd
, alt_status
);
1142 if (consumer
== (instance
->max_fw_cmds
+ 1)) {
1147 *instance
->consumer
= producer
;
1153 * megasas_isr - isr entry point
1155 static irqreturn_t
megasas_isr(int irq
, void *devp
, struct pt_regs
*regs
)
1157 return megasas_deplete_reply_queue((struct megasas_instance
*)devp
,
1162 * megasas_transition_to_ready - Move the FW to READY state
1163 * @reg_set: MFI register set
1165 * During the initialization, FW passes can potentially be in any one of
1166 * several possible states. If the FW in operational, waiting-for-handshake
1167 * states, driver must take steps to bring it to ready state. Otherwise, it
1168 * has to wait for the ready state.
1171 megasas_transition_to_ready(struct megasas_register_set __iomem
* reg_set
)
1178 fw_state
= readl(®_set
->outbound_msg_0
) & MFI_STATE_MASK
;
1180 while (fw_state
!= MFI_STATE_READY
) {
1182 printk(KERN_INFO
"megasas: Waiting for FW to come to ready"
1186 case MFI_STATE_FAULT
:
1188 printk(KERN_DEBUG
"megasas: FW in FAULT state!!\n");
1191 case MFI_STATE_WAIT_HANDSHAKE
:
1193 * Set the CLR bit in inbound doorbell
1195 writel(MFI_INIT_CLEAR_HANDSHAKE
,
1196 ®_set
->inbound_doorbell
);
1199 cur_state
= MFI_STATE_WAIT_HANDSHAKE
;
1202 case MFI_STATE_OPERATIONAL
:
1204 * Bring it to READY state; assuming max wait 2 secs
1206 megasas_disable_intr(reg_set
);
1207 writel(MFI_INIT_READY
, ®_set
->inbound_doorbell
);
1210 cur_state
= MFI_STATE_OPERATIONAL
;
1213 case MFI_STATE_UNDEFINED
:
1215 * This state should not last for more than 2 seconds
1218 cur_state
= MFI_STATE_UNDEFINED
;
1221 case MFI_STATE_BB_INIT
:
1223 cur_state
= MFI_STATE_BB_INIT
;
1226 case MFI_STATE_FW_INIT
:
1228 cur_state
= MFI_STATE_FW_INIT
;
1231 case MFI_STATE_FW_INIT_2
:
1233 cur_state
= MFI_STATE_FW_INIT_2
;
1236 case MFI_STATE_DEVICE_SCAN
:
1238 cur_state
= MFI_STATE_DEVICE_SCAN
;
1241 case MFI_STATE_FLUSH_CACHE
:
1243 cur_state
= MFI_STATE_FLUSH_CACHE
;
1247 printk(KERN_DEBUG
"megasas: Unknown state 0x%x\n",
1253 * The cur_state should not last for more than max_wait secs
1255 for (i
= 0; i
< (max_wait
* 1000); i
++) {
1256 fw_state
= MFI_STATE_MASK
&
1257 readl(®_set
->outbound_msg_0
);
1259 if (fw_state
== cur_state
) {
1266 * Return error if fw_state hasn't changed after max_wait
1268 if (fw_state
== cur_state
) {
1269 printk(KERN_DEBUG
"FW state [%d] hasn't changed "
1270 "in %d secs\n", fw_state
, max_wait
);
1279 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1280 * @instance: Adapter soft state
1282 static void megasas_teardown_frame_pool(struct megasas_instance
*instance
)
1285 u32 max_cmd
= instance
->max_fw_cmds
;
1286 struct megasas_cmd
*cmd
;
1288 if (!instance
->frame_dma_pool
)
1292 * Return all frames to pool
1294 for (i
= 0; i
< max_cmd
; i
++) {
1296 cmd
= instance
->cmd_list
[i
];
1299 pci_pool_free(instance
->frame_dma_pool
, cmd
->frame
,
1300 cmd
->frame_phys_addr
);
1303 pci_pool_free(instance
->sense_dma_pool
, cmd
->frame
,
1304 cmd
->sense_phys_addr
);
1308 * Now destroy the pool itself
1310 pci_pool_destroy(instance
->frame_dma_pool
);
1311 pci_pool_destroy(instance
->sense_dma_pool
);
1313 instance
->frame_dma_pool
= NULL
;
1314 instance
->sense_dma_pool
= NULL
;
1318 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1319 * @instance: Adapter soft state
1321 * Each command packet has an embedded DMA memory buffer that is used for
1322 * filling MFI frame and the SG list that immediately follows the frame. This
1323 * function creates those DMA memory buffers for each command packet by using
1324 * PCI pool facility.
1326 static int megasas_create_frame_pool(struct megasas_instance
*instance
)
1334 struct megasas_cmd
*cmd
;
1336 max_cmd
= instance
->max_fw_cmds
;
1339 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1340 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1342 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
1343 sizeof(struct megasas_sge32
);
1346 * Calculated the number of 64byte frames required for SGL
1348 sgl_sz
= sge_sz
* instance
->max_num_sge
;
1349 frame_count
= (sgl_sz
+ MEGAMFI_FRAME_SIZE
- 1) / MEGAMFI_FRAME_SIZE
;
1352 * We need one extra frame for the MFI command
1356 total_sz
= MEGAMFI_FRAME_SIZE
* frame_count
;
1358 * Use DMA pool facility provided by PCI layer
1360 instance
->frame_dma_pool
= pci_pool_create("megasas frame pool",
1361 instance
->pdev
, total_sz
, 64,
1364 if (!instance
->frame_dma_pool
) {
1365 printk(KERN_DEBUG
"megasas: failed to setup frame pool\n");
1369 instance
->sense_dma_pool
= pci_pool_create("megasas sense pool",
1370 instance
->pdev
, 128, 4, 0);
1372 if (!instance
->sense_dma_pool
) {
1373 printk(KERN_DEBUG
"megasas: failed to setup sense pool\n");
1375 pci_pool_destroy(instance
->frame_dma_pool
);
1376 instance
->frame_dma_pool
= NULL
;
1382 * Allocate and attach a frame to each of the commands in cmd_list.
1383 * By making cmd->index as the context instead of the &cmd, we can
1384 * always use 32bit context regardless of the architecture
1386 for (i
= 0; i
< max_cmd
; i
++) {
1388 cmd
= instance
->cmd_list
[i
];
1390 cmd
->frame
= pci_pool_alloc(instance
->frame_dma_pool
,
1391 GFP_KERNEL
, &cmd
->frame_phys_addr
);
1393 cmd
->sense
= pci_pool_alloc(instance
->sense_dma_pool
,
1394 GFP_KERNEL
, &cmd
->sense_phys_addr
);
1397 * megasas_teardown_frame_pool() takes care of freeing
1398 * whatever has been allocated
1400 if (!cmd
->frame
|| !cmd
->sense
) {
1401 printk(KERN_DEBUG
"megasas: pci_pool_alloc failed \n");
1402 megasas_teardown_frame_pool(instance
);
1406 cmd
->frame
->io
.context
= cmd
->index
;
1413 * megasas_free_cmds - Free all the cmds in the free cmd pool
1414 * @instance: Adapter soft state
1416 static void megasas_free_cmds(struct megasas_instance
*instance
)
1419 /* First free the MFI frame pool */
1420 megasas_teardown_frame_pool(instance
);
1422 /* Free all the commands in the cmd_list */
1423 for (i
= 0; i
< instance
->max_fw_cmds
; i
++)
1424 kfree(instance
->cmd_list
[i
]);
1426 /* Free the cmd_list buffer itself */
1427 kfree(instance
->cmd_list
);
1428 instance
->cmd_list
= NULL
;
1430 INIT_LIST_HEAD(&instance
->cmd_pool
);
1434 * megasas_alloc_cmds - Allocates the command packets
1435 * @instance: Adapter soft state
1437 * Each command that is issued to the FW, whether IO commands from the OS or
1438 * internal commands like IOCTLs, are wrapped in local data structure called
1439 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1442 * Each frame has a 32-bit field called context (tag). This context is used
1443 * to get back the megasas_cmd from the frame when a frame gets completed in
1444 * the ISR. Typically the address of the megasas_cmd itself would be used as
1445 * the context. But we wanted to keep the differences between 32 and 64 bit
1446 * systems to the mininum. We always use 32 bit integers for the context. In
1447 * this driver, the 32 bit values are the indices into an array cmd_list.
1448 * This array is used only to look up the megasas_cmd given the context. The
1449 * free commands themselves are maintained in a linked list called cmd_pool.
1451 static int megasas_alloc_cmds(struct megasas_instance
*instance
)
1456 struct megasas_cmd
*cmd
;
1458 max_cmd
= instance
->max_fw_cmds
;
1461 * instance->cmd_list is an array of struct megasas_cmd pointers.
1462 * Allocate the dynamic array first and then allocate individual
1465 instance
->cmd_list
= kmalloc(sizeof(struct megasas_cmd
*) * max_cmd
,
1468 if (!instance
->cmd_list
) {
1469 printk(KERN_DEBUG
"megasas: out of memory\n");
1473 memset(instance
->cmd_list
, 0, sizeof(struct megasas_cmd
*) * max_cmd
);
1475 for (i
= 0; i
< max_cmd
; i
++) {
1476 instance
->cmd_list
[i
] = kmalloc(sizeof(struct megasas_cmd
),
1479 if (!instance
->cmd_list
[i
]) {
1481 for (j
= 0; j
< i
; j
++)
1482 kfree(instance
->cmd_list
[j
]);
1484 kfree(instance
->cmd_list
);
1485 instance
->cmd_list
= NULL
;
1492 * Add all the commands to command pool (instance->cmd_pool)
1494 for (i
= 0; i
< max_cmd
; i
++) {
1495 cmd
= instance
->cmd_list
[i
];
1496 memset(cmd
, 0, sizeof(struct megasas_cmd
));
1498 cmd
->instance
= instance
;
1500 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
1504 * Create a frame pool and assign one frame to each cmd
1506 if (megasas_create_frame_pool(instance
)) {
1507 printk(KERN_DEBUG
"megasas: Error creating frame DMA pool\n");
1508 megasas_free_cmds(instance
);
1515 * megasas_get_controller_info - Returns FW's controller structure
1516 * @instance: Adapter soft state
1517 * @ctrl_info: Controller information structure
1519 * Issues an internal command (DCMD) to get the FW's controller structure.
1520 * This information is mainly used to find out the maximum IO transfer per
1521 * command supported by the FW.
1524 megasas_get_ctrl_info(struct megasas_instance
*instance
,
1525 struct megasas_ctrl_info
*ctrl_info
)
1528 struct megasas_cmd
*cmd
;
1529 struct megasas_dcmd_frame
*dcmd
;
1530 struct megasas_ctrl_info
*ci
;
1531 dma_addr_t ci_h
= 0;
1533 cmd
= megasas_get_cmd(instance
);
1536 printk(KERN_DEBUG
"megasas: Failed to get a free cmd\n");
1540 dcmd
= &cmd
->frame
->dcmd
;
1542 ci
= pci_alloc_consistent(instance
->pdev
,
1543 sizeof(struct megasas_ctrl_info
), &ci_h
);
1546 printk(KERN_DEBUG
"Failed to alloc mem for ctrl info\n");
1547 megasas_return_cmd(instance
, cmd
);
1551 memset(ci
, 0, sizeof(*ci
));
1552 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
1554 dcmd
->cmd
= MFI_CMD_DCMD
;
1555 dcmd
->cmd_status
= 0xFF;
1556 dcmd
->sge_count
= 1;
1557 dcmd
->flags
= MFI_FRAME_DIR_READ
;
1559 dcmd
->data_xfer_len
= sizeof(struct megasas_ctrl_info
);
1560 dcmd
->opcode
= MR_DCMD_CTRL_GET_INFO
;
1561 dcmd
->sgl
.sge32
[0].phys_addr
= ci_h
;
1562 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_ctrl_info
);
1564 if (!megasas_issue_polled(instance
, cmd
)) {
1566 memcpy(ctrl_info
, ci
, sizeof(struct megasas_ctrl_info
));
1571 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_ctrl_info
),
1574 megasas_return_cmd(instance
, cmd
);
1579 * megasas_init_mfi - Initializes the FW
1580 * @instance: Adapter soft state
1582 * This is the main function for initializing MFI firmware.
1584 static int megasas_init_mfi(struct megasas_instance
*instance
)
1590 struct megasas_register_set __iomem
*reg_set
;
1592 struct megasas_cmd
*cmd
;
1593 struct megasas_ctrl_info
*ctrl_info
;
1595 struct megasas_init_frame
*init_frame
;
1596 struct megasas_init_queue_info
*initq_info
;
1597 dma_addr_t init_frame_h
;
1598 dma_addr_t initq_info_h
;
1601 * Map the message registers
1603 instance
->base_addr
= pci_resource_start(instance
->pdev
, 0);
1605 if (pci_request_regions(instance
->pdev
, "megasas: LSI Logic")) {
1606 printk(KERN_DEBUG
"megasas: IO memory region busy!\n");
1610 instance
->reg_set
= ioremap_nocache(instance
->base_addr
, 8192);
1612 if (!instance
->reg_set
) {
1613 printk(KERN_DEBUG
"megasas: Failed to map IO mem\n");
1617 reg_set
= instance
->reg_set
;
1620 * We expect the FW state to be READY
1622 if (megasas_transition_to_ready(instance
->reg_set
))
1623 goto fail_ready_state
;
1626 * Get various operational parameters from status register
1628 instance
->max_fw_cmds
= readl(®_set
->outbound_msg_0
) & 0x00FFFF;
1629 instance
->max_num_sge
= (readl(®_set
->outbound_msg_0
) & 0xFF0000) >>
1632 * Create a pool of commands
1634 if (megasas_alloc_cmds(instance
))
1635 goto fail_alloc_cmds
;
1638 * Allocate memory for reply queue. Length of reply queue should
1639 * be _one_ more than the maximum commands handled by the firmware.
1641 * Note: When FW completes commands, it places corresponding contex
1642 * values in this circular reply queue. This circular queue is a fairly
1643 * typical producer-consumer queue. FW is the producer (of completed
1644 * commands) and the driver is the consumer.
1646 context_sz
= sizeof(u32
);
1647 reply_q_sz
= context_sz
* (instance
->max_fw_cmds
+ 1);
1649 instance
->reply_queue
= pci_alloc_consistent(instance
->pdev
,
1651 &instance
->reply_queue_h
);
1653 if (!instance
->reply_queue
) {
1654 printk(KERN_DEBUG
"megasas: Out of DMA mem for reply queue\n");
1655 goto fail_reply_queue
;
1659 * Prepare a init frame. Note the init frame points to queue info
1660 * structure. Each frame has SGL allocated after first 64 bytes. For
1661 * this frame - since we don't need any SGL - we use SGL's space as
1662 * queue info structure
1664 * We will not get a NULL command below. We just created the pool.
1666 cmd
= megasas_get_cmd(instance
);
1668 init_frame
= (struct megasas_init_frame
*)cmd
->frame
;
1669 initq_info
= (struct megasas_init_queue_info
*)
1670 ((unsigned long)init_frame
+ 64);
1672 init_frame_h
= cmd
->frame_phys_addr
;
1673 initq_info_h
= init_frame_h
+ 64;
1675 memset(init_frame
, 0, MEGAMFI_FRAME_SIZE
);
1676 memset(initq_info
, 0, sizeof(struct megasas_init_queue_info
));
1678 initq_info
->reply_queue_entries
= instance
->max_fw_cmds
+ 1;
1679 initq_info
->reply_queue_start_phys_addr_lo
= instance
->reply_queue_h
;
1681 initq_info
->producer_index_phys_addr_lo
= instance
->producer_h
;
1682 initq_info
->consumer_index_phys_addr_lo
= instance
->consumer_h
;
1684 init_frame
->cmd
= MFI_CMD_INIT
;
1685 init_frame
->cmd_status
= 0xFF;
1686 init_frame
->queue_info_new_phys_addr_lo
= initq_info_h
;
1688 init_frame
->data_xfer_len
= sizeof(struct megasas_init_queue_info
);
1691 * Issue the init frame in polled mode
1693 if (megasas_issue_polled(instance
, cmd
)) {
1694 printk(KERN_DEBUG
"megasas: Failed to init firmware\n");
1698 megasas_return_cmd(instance
, cmd
);
1700 ctrl_info
= kmalloc(sizeof(struct megasas_ctrl_info
), GFP_KERNEL
);
1703 * Compute the max allowed sectors per IO: The controller info has two
1704 * limits on max sectors. Driver should use the minimum of these two.
1706 * 1 << stripe_sz_ops.min = max sectors per strip
1708 * Note that older firmwares ( < FW ver 30) didn't report information
1709 * to calculate max_sectors_1. So the number ended up as zero always.
1711 if (ctrl_info
&& !megasas_get_ctrl_info(instance
, ctrl_info
)) {
1713 max_sectors_1
= (1 << ctrl_info
->stripe_sz_ops
.min
) *
1714 ctrl_info
->max_strips_per_io
;
1715 max_sectors_2
= ctrl_info
->max_request_size
;
1717 instance
->max_sectors_per_req
= (max_sectors_1
< max_sectors_2
)
1718 ? max_sectors_1
: max_sectors_2
;
1720 instance
->max_sectors_per_req
= instance
->max_num_sge
*
1728 megasas_return_cmd(instance
, cmd
);
1730 pci_free_consistent(instance
->pdev
, reply_q_sz
,
1731 instance
->reply_queue
, instance
->reply_queue_h
);
1733 megasas_free_cmds(instance
);
1737 iounmap(instance
->reg_set
);
1740 pci_release_regions(instance
->pdev
);
1746 * megasas_release_mfi - Reverses the FW initialization
1747 * @intance: Adapter soft state
1749 static void megasas_release_mfi(struct megasas_instance
*instance
)
1751 u32 reply_q_sz
= sizeof(u32
) * (instance
->max_fw_cmds
+ 1);
1753 pci_free_consistent(instance
->pdev
, reply_q_sz
,
1754 instance
->reply_queue
, instance
->reply_queue_h
);
1756 megasas_free_cmds(instance
);
1758 iounmap(instance
->reg_set
);
1760 pci_release_regions(instance
->pdev
);
1764 * megasas_get_seq_num - Gets latest event sequence numbers
1765 * @instance: Adapter soft state
1766 * @eli: FW event log sequence numbers information
1768 * FW maintains a log of all events in a non-volatile area. Upper layers would
1769 * usually find out the latest sequence number of the events, the seq number at
1770 * the boot etc. They would "read" all the events below the latest seq number
1771 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
1772 * number), they would subsribe to AEN (asynchronous event notification) and
1773 * wait for the events to happen.
1776 megasas_get_seq_num(struct megasas_instance
*instance
,
1777 struct megasas_evt_log_info
*eli
)
1779 struct megasas_cmd
*cmd
;
1780 struct megasas_dcmd_frame
*dcmd
;
1781 struct megasas_evt_log_info
*el_info
;
1782 dma_addr_t el_info_h
= 0;
1784 cmd
= megasas_get_cmd(instance
);
1790 dcmd
= &cmd
->frame
->dcmd
;
1791 el_info
= pci_alloc_consistent(instance
->pdev
,
1792 sizeof(struct megasas_evt_log_info
),
1796 megasas_return_cmd(instance
, cmd
);
1800 memset(el_info
, 0, sizeof(*el_info
));
1801 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
1803 dcmd
->cmd
= MFI_CMD_DCMD
;
1804 dcmd
->cmd_status
= 0x0;
1805 dcmd
->sge_count
= 1;
1806 dcmd
->flags
= MFI_FRAME_DIR_READ
;
1808 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_log_info
);
1809 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_GET_INFO
;
1810 dcmd
->sgl
.sge32
[0].phys_addr
= el_info_h
;
1811 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_log_info
);
1813 megasas_issue_blocked_cmd(instance
, cmd
);
1816 * Copy the data back into callers buffer
1818 memcpy(eli
, el_info
, sizeof(struct megasas_evt_log_info
));
1820 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_evt_log_info
),
1821 el_info
, el_info_h
);
1823 megasas_return_cmd(instance
, cmd
);
1829 * megasas_register_aen - Registers for asynchronous event notification
1830 * @instance: Adapter soft state
1831 * @seq_num: The starting sequence number
1832 * @class_locale: Class of the event
1834 * This function subscribes for AEN for events beyond the @seq_num. It requests
1835 * to be notified if and only if the event is of type @class_locale
1838 megasas_register_aen(struct megasas_instance
*instance
, u32 seq_num
,
1839 u32 class_locale_word
)
1842 struct megasas_cmd
*cmd
;
1843 struct megasas_dcmd_frame
*dcmd
;
1844 union megasas_evt_class_locale curr_aen
;
1845 union megasas_evt_class_locale prev_aen
;
1848 * If there an AEN pending already (aen_cmd), check if the
1849 * class_locale of that pending AEN is inclusive of the new
1850 * AEN request we currently have. If it is, then we don't have
1851 * to do anything. In other words, whichever events the current
1852 * AEN request is subscribing to, have already been subscribed
1855 * If the old_cmd is _not_ inclusive, then we have to abort
1856 * that command, form a class_locale that is superset of both
1857 * old and current and re-issue to the FW
1860 curr_aen
.word
= class_locale_word
;
1862 if (instance
->aen_cmd
) {
1864 prev_aen
.word
= instance
->aen_cmd
->frame
->dcmd
.mbox
.w
[1];
1867 * A class whose enum value is smaller is inclusive of all
1868 * higher values. If a PROGRESS (= -1) was previously
1869 * registered, then a new registration requests for higher
1870 * classes need not be sent to FW. They are automatically
1873 * Locale numbers don't have such hierarchy. They are bitmap
1876 if ((prev_aen
.members
.class <= curr_aen
.members
.class) &&
1877 !((prev_aen
.members
.locale
& curr_aen
.members
.locale
) ^
1878 curr_aen
.members
.locale
)) {
1880 * Previously issued event registration includes
1881 * current request. Nothing to do.
1885 curr_aen
.members
.locale
|= prev_aen
.members
.locale
;
1887 if (prev_aen
.members
.class < curr_aen
.members
.class)
1888 curr_aen
.members
.class = prev_aen
.members
.class;
1890 instance
->aen_cmd
->abort_aen
= 1;
1891 ret_val
= megasas_issue_blocked_abort_cmd(instance
,
1896 printk(KERN_DEBUG
"megasas: Failed to abort "
1897 "previous AEN command\n");
1903 cmd
= megasas_get_cmd(instance
);
1908 dcmd
= &cmd
->frame
->dcmd
;
1910 memset(instance
->evt_detail
, 0, sizeof(struct megasas_evt_detail
));
1913 * Prepare DCMD for aen registration
1915 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
1917 dcmd
->cmd
= MFI_CMD_DCMD
;
1918 dcmd
->cmd_status
= 0x0;
1919 dcmd
->sge_count
= 1;
1920 dcmd
->flags
= MFI_FRAME_DIR_READ
;
1922 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_detail
);
1923 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_WAIT
;
1924 dcmd
->mbox
.w
[0] = seq_num
;
1925 dcmd
->mbox
.w
[1] = curr_aen
.word
;
1926 dcmd
->sgl
.sge32
[0].phys_addr
= (u32
) instance
->evt_detail_h
;
1927 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_detail
);
1930 * Store reference to the cmd used to register for AEN. When an
1931 * application wants us to register for AEN, we have to abort this
1932 * cmd and re-register with a new EVENT LOCALE supplied by that app
1934 instance
->aen_cmd
= cmd
;
1937 * Issue the aen registration frame
1939 writel(cmd
->frame_phys_addr
>> 3,
1940 &instance
->reg_set
->inbound_queue_port
);
1946 * megasas_start_aen - Subscribes to AEN during driver load time
1947 * @instance: Adapter soft state
1949 static int megasas_start_aen(struct megasas_instance
*instance
)
1951 struct megasas_evt_log_info eli
;
1952 union megasas_evt_class_locale class_locale
;
1955 * Get the latest sequence number from FW
1957 memset(&eli
, 0, sizeof(eli
));
1959 if (megasas_get_seq_num(instance
, &eli
))
1963 * Register AEN with FW for latest sequence number plus 1
1965 class_locale
.members
.reserved
= 0;
1966 class_locale
.members
.locale
= MR_EVT_LOCALE_ALL
;
1967 class_locale
.members
.class = MR_EVT_CLASS_DEBUG
;
1969 return megasas_register_aen(instance
, eli
.newest_seq_num
+ 1,
1974 * megasas_io_attach - Attaches this driver to SCSI mid-layer
1975 * @instance: Adapter soft state
1977 static int megasas_io_attach(struct megasas_instance
*instance
)
1979 struct Scsi_Host
*host
= instance
->host
;
1982 * Export parameters required by SCSI mid-layer
1984 host
->irq
= instance
->pdev
->irq
;
1985 host
->unique_id
= instance
->unique_id
;
1986 host
->can_queue
= instance
->max_fw_cmds
- MEGASAS_INT_CMDS
;
1987 host
->this_id
= instance
->init_id
;
1988 host
->sg_tablesize
= instance
->max_num_sge
;
1989 host
->max_sectors
= instance
->max_sectors_per_req
;
1990 host
->cmd_per_lun
= 128;
1991 host
->max_channel
= MEGASAS_MAX_CHANNELS
- 1;
1992 host
->max_id
= MEGASAS_MAX_DEV_PER_CHANNEL
;
1993 host
->max_lun
= MEGASAS_MAX_LUN
;
1996 * Notify the mid-layer about the new controller
1998 if (scsi_add_host(host
, &instance
->pdev
->dev
)) {
1999 printk(KERN_DEBUG
"megasas: scsi_add_host failed\n");
2004 * Trigger SCSI to scan our drives
2006 scsi_scan_host(host
);
2011 * megasas_probe_one - PCI hotplug entry point
2012 * @pdev: PCI device structure
2013 * @id: PCI ids of supported hotplugged adapter
2015 static int __devinit
2016 megasas_probe_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
2019 struct Scsi_Host
*host
;
2020 struct megasas_instance
*instance
;
2023 * Announce PCI information
2025 printk(KERN_INFO
"megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2026 pdev
->vendor
, pdev
->device
, pdev
->subsystem_vendor
,
2027 pdev
->subsystem_device
);
2029 printk("bus %d:slot %d:func %d\n",
2030 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
), PCI_FUNC(pdev
->devfn
));
2033 * PCI prepping: enable device set bus mastering and dma mask
2035 rval
= pci_enable_device(pdev
);
2041 pci_set_master(pdev
);
2044 * All our contollers are capable of performing 64-bit DMA
2047 if (pci_set_dma_mask(pdev
, DMA_64BIT_MASK
) != 0) {
2049 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2050 goto fail_set_dma_mask
;
2053 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2054 goto fail_set_dma_mask
;
2057 host
= scsi_host_alloc(&megasas_template
,
2058 sizeof(struct megasas_instance
));
2061 printk(KERN_DEBUG
"megasas: scsi_host_alloc failed\n");
2062 goto fail_alloc_instance
;
2065 instance
= (struct megasas_instance
*)host
->hostdata
;
2066 memset(instance
, 0, sizeof(*instance
));
2068 instance
->producer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2069 &instance
->producer_h
);
2070 instance
->consumer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2071 &instance
->consumer_h
);
2073 if (!instance
->producer
|| !instance
->consumer
) {
2074 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2075 "producer, consumer\n");
2076 goto fail_alloc_dma_buf
;
2079 *instance
->producer
= 0;
2080 *instance
->consumer
= 0;
2082 instance
->evt_detail
= pci_alloc_consistent(pdev
,
2084 megasas_evt_detail
),
2085 &instance
->evt_detail_h
);
2087 if (!instance
->evt_detail
) {
2088 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2089 "event detail structure\n");
2090 goto fail_alloc_dma_buf
;
2094 * Initialize locks and queues
2096 INIT_LIST_HEAD(&instance
->cmd_pool
);
2098 init_waitqueue_head(&instance
->int_cmd_wait_q
);
2099 init_waitqueue_head(&instance
->abort_cmd_wait_q
);
2101 spin_lock_init(&instance
->cmd_pool_lock
);
2102 spin_lock_init(&instance
->instance_lock
);
2104 sema_init(&instance
->aen_mutex
, 1);
2105 sema_init(&instance
->ioctl_sem
, MEGASAS_INT_CMDS
);
2108 * Initialize PCI related and misc parameters
2110 instance
->pdev
= pdev
;
2111 instance
->host
= host
;
2112 instance
->unique_id
= pdev
->bus
->number
<< 8 | pdev
->devfn
;
2113 instance
->init_id
= MEGASAS_DEFAULT_INIT_ID
;
2116 * Initialize MFI Firmware
2118 if (megasas_init_mfi(instance
))
2124 if (request_irq(pdev
->irq
, megasas_isr
, SA_SHIRQ
, "megasas", instance
)) {
2125 printk(KERN_DEBUG
"megasas: Failed to register IRQ\n");
2129 megasas_enable_intr(instance
->reg_set
);
2132 * Store instance in PCI softstate
2134 pci_set_drvdata(pdev
, instance
);
2137 * Add this controller to megasas_mgmt_info structure so that it
2138 * can be exported to management applications
2140 megasas_mgmt_info
.count
++;
2141 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = instance
;
2142 megasas_mgmt_info
.max_index
++;
2145 * Initiate AEN (Asynchronous Event Notification)
2147 if (megasas_start_aen(instance
)) {
2148 printk(KERN_DEBUG
"megasas: start aen failed\n");
2149 goto fail_start_aen
;
2153 * Register with SCSI mid-layer
2155 if (megasas_io_attach(instance
))
2156 goto fail_io_attach
;
2162 megasas_mgmt_info
.count
--;
2163 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = NULL
;
2164 megasas_mgmt_info
.max_index
--;
2166 pci_set_drvdata(pdev
, NULL
);
2167 megasas_disable_intr(instance
->reg_set
);
2168 free_irq(instance
->pdev
->irq
, instance
);
2170 megasas_release_mfi(instance
);
2175 if (instance
->evt_detail
)
2176 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2177 instance
->evt_detail
,
2178 instance
->evt_detail_h
);
2180 if (instance
->producer
)
2181 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2182 instance
->producer_h
);
2183 if (instance
->consumer
)
2184 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2185 instance
->consumer_h
);
2186 scsi_host_put(host
);
2188 fail_alloc_instance
:
2190 pci_disable_device(pdev
);
2196 * megasas_flush_cache - Requests FW to flush all its caches
2197 * @instance: Adapter soft state
2199 static void megasas_flush_cache(struct megasas_instance
*instance
)
2201 struct megasas_cmd
*cmd
;
2202 struct megasas_dcmd_frame
*dcmd
;
2204 cmd
= megasas_get_cmd(instance
);
2209 dcmd
= &cmd
->frame
->dcmd
;
2211 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2213 dcmd
->cmd
= MFI_CMD_DCMD
;
2214 dcmd
->cmd_status
= 0x0;
2215 dcmd
->sge_count
= 0;
2216 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2218 dcmd
->data_xfer_len
= 0;
2219 dcmd
->opcode
= MR_DCMD_CTRL_CACHE_FLUSH
;
2220 dcmd
->mbox
.b
[0] = MR_FLUSH_CTRL_CACHE
| MR_FLUSH_DISK_CACHE
;
2222 megasas_issue_blocked_cmd(instance
, cmd
);
2224 megasas_return_cmd(instance
, cmd
);
2230 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2231 * @instance: Adapter soft state
2233 static void megasas_shutdown_controller(struct megasas_instance
*instance
)
2235 struct megasas_cmd
*cmd
;
2236 struct megasas_dcmd_frame
*dcmd
;
2238 cmd
= megasas_get_cmd(instance
);
2243 if (instance
->aen_cmd
)
2244 megasas_issue_blocked_abort_cmd(instance
, instance
->aen_cmd
);
2246 dcmd
= &cmd
->frame
->dcmd
;
2248 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2250 dcmd
->cmd
= MFI_CMD_DCMD
;
2251 dcmd
->cmd_status
= 0x0;
2252 dcmd
->sge_count
= 0;
2253 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2255 dcmd
->data_xfer_len
= 0;
2256 dcmd
->opcode
= MR_DCMD_CTRL_SHUTDOWN
;
2258 megasas_issue_blocked_cmd(instance
, cmd
);
2260 megasas_return_cmd(instance
, cmd
);
2266 * megasas_detach_one - PCI hot"un"plug entry point
2267 * @pdev: PCI device structure
2269 static void megasas_detach_one(struct pci_dev
*pdev
)
2272 struct Scsi_Host
*host
;
2273 struct megasas_instance
*instance
;
2275 instance
= pci_get_drvdata(pdev
);
2276 host
= instance
->host
;
2278 scsi_remove_host(instance
->host
);
2279 megasas_flush_cache(instance
);
2280 megasas_shutdown_controller(instance
);
2283 * Take the instance off the instance array. Note that we will not
2284 * decrement the max_index. We let this array be sparse array
2286 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
2287 if (megasas_mgmt_info
.instance
[i
] == instance
) {
2288 megasas_mgmt_info
.count
--;
2289 megasas_mgmt_info
.instance
[i
] = NULL
;
2295 pci_set_drvdata(instance
->pdev
, NULL
);
2297 megasas_disable_intr(instance
->reg_set
);
2299 free_irq(instance
->pdev
->irq
, instance
);
2301 megasas_release_mfi(instance
);
2303 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2304 instance
->evt_detail
, instance
->evt_detail_h
);
2306 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2307 instance
->producer_h
);
2309 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2310 instance
->consumer_h
);
2312 scsi_host_put(host
);
2314 pci_set_drvdata(pdev
, NULL
);
2316 pci_disable_device(pdev
);
2322 * megasas_shutdown - Shutdown entry point
2323 * @device: Generic device structure
2325 static void megasas_shutdown(struct pci_dev
*pdev
)
2327 struct megasas_instance
*instance
= pci_get_drvdata(pdev
);
2328 megasas_flush_cache(instance
);
2332 * megasas_mgmt_open - char node "open" entry point
2334 static int megasas_mgmt_open(struct inode
*inode
, struct file
*filep
)
2337 * Allow only those users with admin rights
2339 if (!capable(CAP_SYS_ADMIN
))
2346 * megasas_mgmt_release - char node "release" entry point
2348 static int megasas_mgmt_release(struct inode
*inode
, struct file
*filep
)
2350 filep
->private_data
= NULL
;
2351 fasync_helper(-1, filep
, 0, &megasas_async_queue
);
2357 * megasas_mgmt_fasync - Async notifier registration from applications
2359 * This function adds the calling process to a driver global queue. When an
2360 * event occurs, SIGIO will be sent to all processes in this queue.
2362 static int megasas_mgmt_fasync(int fd
, struct file
*filep
, int mode
)
2366 mutex_lock(&megasas_async_queue_mutex
);
2368 rc
= fasync_helper(fd
, filep
, mode
, &megasas_async_queue
);
2370 mutex_unlock(&megasas_async_queue_mutex
);
2373 /* For sanity check when we get ioctl */
2374 filep
->private_data
= filep
;
2378 printk(KERN_DEBUG
"megasas: fasync_helper failed [%d]\n", rc
);
2384 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2385 * @instance: Adapter soft state
2386 * @argp: User's ioctl packet
2389 megasas_mgmt_fw_ioctl(struct megasas_instance
*instance
,
2390 struct megasas_iocpacket __user
* user_ioc
,
2391 struct megasas_iocpacket
*ioc
)
2393 struct megasas_sge32
*kern_sge32
;
2394 struct megasas_cmd
*cmd
;
2395 void *kbuff_arr
[MAX_IOCTL_SGE
];
2396 dma_addr_t buf_handle
= 0;
2399 dma_addr_t sense_handle
;
2402 memset(kbuff_arr
, 0, sizeof(kbuff_arr
));
2404 if (ioc
->sge_count
> MAX_IOCTL_SGE
) {
2405 printk(KERN_DEBUG
"megasas: SGE count [%d] > max limit [%d]\n",
2406 ioc
->sge_count
, MAX_IOCTL_SGE
);
2410 cmd
= megasas_get_cmd(instance
);
2412 printk(KERN_DEBUG
"megasas: Failed to get a cmd packet\n");
2417 * User's IOCTL packet has 2 frames (maximum). Copy those two
2418 * frames into our cmd's frames. cmd->frame's context will get
2419 * overwritten when we copy from user's frames. So set that value
2422 memcpy(cmd
->frame
, ioc
->frame
.raw
, 2 * MEGAMFI_FRAME_SIZE
);
2423 cmd
->frame
->hdr
.context
= cmd
->index
;
2426 * The management interface between applications and the fw uses
2427 * MFI frames. E.g, RAID configuration changes, LD property changes
2428 * etc are accomplishes through different kinds of MFI frames. The
2429 * driver needs to care only about substituting user buffers with
2430 * kernel buffers in SGLs. The location of SGL is embedded in the
2431 * struct iocpacket itself.
2433 kern_sge32
= (struct megasas_sge32
*)
2434 ((unsigned long)cmd
->frame
+ ioc
->sgl_off
);
2437 * For each user buffer, create a mirror buffer and copy in
2439 for (i
= 0; i
< ioc
->sge_count
; i
++) {
2440 kbuff_arr
[i
] = pci_alloc_consistent(instance
->pdev
,
2441 ioc
->sgl
[i
].iov_len
,
2443 if (!kbuff_arr
[i
]) {
2444 printk(KERN_DEBUG
"megasas: Failed to alloc "
2445 "kernel SGL buffer for IOCTL \n");
2451 * We don't change the dma_coherent_mask, so
2452 * pci_alloc_consistent only returns 32bit addresses
2454 kern_sge32
[i
].phys_addr
= (u32
) buf_handle
;
2455 kern_sge32
[i
].length
= ioc
->sgl
[i
].iov_len
;
2458 * We created a kernel buffer corresponding to the
2459 * user buffer. Now copy in from the user buffer
2461 if (copy_from_user(kbuff_arr
[i
], ioc
->sgl
[i
].iov_base
,
2462 (u32
) (ioc
->sgl
[i
].iov_len
))) {
2468 if (ioc
->sense_len
) {
2469 sense
= pci_alloc_consistent(instance
->pdev
, ioc
->sense_len
,
2477 (u32
*) ((unsigned long)cmd
->frame
+ ioc
->sense_off
);
2478 *sense_ptr
= sense_handle
;
2482 * Set the sync_cmd flag so that the ISR knows not to complete this
2483 * cmd to the SCSI mid-layer
2486 megasas_issue_blocked_cmd(instance
, cmd
);
2490 * copy out the kernel buffers to user buffers
2492 for (i
= 0; i
< ioc
->sge_count
; i
++) {
2493 if (copy_to_user(ioc
->sgl
[i
].iov_base
, kbuff_arr
[i
],
2494 ioc
->sgl
[i
].iov_len
)) {
2501 * copy out the sense
2503 if (ioc
->sense_len
) {
2505 * sense_ptr points to the location that has the user
2506 * sense buffer address
2508 sense_ptr
= (u32
*) ((unsigned long)ioc
->frame
.raw
+
2511 if (copy_to_user((void __user
*)((unsigned long)(*sense_ptr
)),
2512 sense
, ioc
->sense_len
)) {
2519 * copy the status codes returned by the fw
2521 if (copy_to_user(&user_ioc
->frame
.hdr
.cmd_status
,
2522 &cmd
->frame
->hdr
.cmd_status
, sizeof(u8
))) {
2523 printk(KERN_DEBUG
"megasas: Error copying out cmd_status\n");
2529 pci_free_consistent(instance
->pdev
, ioc
->sense_len
,
2530 sense
, sense_handle
);
2533 for (i
= 0; i
< ioc
->sge_count
&& kbuff_arr
[i
]; i
++) {
2534 pci_free_consistent(instance
->pdev
,
2535 kern_sge32
[i
].length
,
2536 kbuff_arr
[i
], kern_sge32
[i
].phys_addr
);
2539 megasas_return_cmd(instance
, cmd
);
2543 static struct megasas_instance
*megasas_lookup_instance(u16 host_no
)
2547 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
2549 if ((megasas_mgmt_info
.instance
[i
]) &&
2550 (megasas_mgmt_info
.instance
[i
]->host
->host_no
== host_no
))
2551 return megasas_mgmt_info
.instance
[i
];
2557 static int megasas_mgmt_ioctl_fw(struct file
*file
, unsigned long arg
)
2559 struct megasas_iocpacket __user
*user_ioc
=
2560 (struct megasas_iocpacket __user
*)arg
;
2561 struct megasas_iocpacket
*ioc
;
2562 struct megasas_instance
*instance
;
2565 ioc
= kmalloc(sizeof(*ioc
), GFP_KERNEL
);
2569 if (copy_from_user(ioc
, user_ioc
, sizeof(*ioc
))) {
2574 instance
= megasas_lookup_instance(ioc
->host_no
);
2581 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
2583 if (down_interruptible(&instance
->ioctl_sem
)) {
2584 error
= -ERESTARTSYS
;
2587 error
= megasas_mgmt_fw_ioctl(instance
, user_ioc
, ioc
);
2588 up(&instance
->ioctl_sem
);
2595 static int megasas_mgmt_ioctl_aen(struct file
*file
, unsigned long arg
)
2597 struct megasas_instance
*instance
;
2598 struct megasas_aen aen
;
2601 if (file
->private_data
!= file
) {
2602 printk(KERN_DEBUG
"megasas: fasync_helper was not "
2607 if (copy_from_user(&aen
, (void __user
*)arg
, sizeof(aen
)))
2610 instance
= megasas_lookup_instance(aen
.host_no
);
2615 down(&instance
->aen_mutex
);
2616 error
= megasas_register_aen(instance
, aen
.seq_num
,
2617 aen
.class_locale_word
);
2618 up(&instance
->aen_mutex
);
2623 * megasas_mgmt_ioctl - char node ioctl entry point
2626 megasas_mgmt_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
2629 case MEGASAS_IOC_FIRMWARE
:
2630 return megasas_mgmt_ioctl_fw(file
, arg
);
2632 case MEGASAS_IOC_GET_AEN
:
2633 return megasas_mgmt_ioctl_aen(file
, arg
);
2639 #ifdef CONFIG_COMPAT
2640 static int megasas_mgmt_compat_ioctl_fw(struct file
*file
, unsigned long arg
)
2642 struct compat_megasas_iocpacket __user
*cioc
=
2643 (struct compat_megasas_iocpacket __user
*)arg
;
2644 struct megasas_iocpacket __user
*ioc
=
2645 compat_alloc_user_space(sizeof(struct megasas_iocpacket
));
2649 clear_user(ioc
, sizeof(*ioc
));
2651 if (copy_in_user(&ioc
->host_no
, &cioc
->host_no
, sizeof(u16
)) ||
2652 copy_in_user(&ioc
->sgl_off
, &cioc
->sgl_off
, sizeof(u32
)) ||
2653 copy_in_user(&ioc
->sense_off
, &cioc
->sense_off
, sizeof(u32
)) ||
2654 copy_in_user(&ioc
->sense_len
, &cioc
->sense_len
, sizeof(u32
)) ||
2655 copy_in_user(ioc
->frame
.raw
, cioc
->frame
.raw
, 128) ||
2656 copy_in_user(&ioc
->sge_count
, &cioc
->sge_count
, sizeof(u32
)))
2659 for (i
= 0; i
< MAX_IOCTL_SGE
; i
++) {
2662 if (get_user(ptr
, &cioc
->sgl
[i
].iov_base
) ||
2663 put_user(compat_ptr(ptr
), &ioc
->sgl
[i
].iov_base
) ||
2664 copy_in_user(&ioc
->sgl
[i
].iov_len
,
2665 &cioc
->sgl
[i
].iov_len
, sizeof(compat_size_t
)))
2669 error
= megasas_mgmt_ioctl_fw(file
, (unsigned long)ioc
);
2671 if (copy_in_user(&cioc
->frame
.hdr
.cmd_status
,
2672 &ioc
->frame
.hdr
.cmd_status
, sizeof(u8
))) {
2673 printk(KERN_DEBUG
"megasas: error copy_in_user cmd_status\n");
2680 megasas_mgmt_compat_ioctl(struct file
*file
, unsigned int cmd
,
2684 case MEGASAS_IOC_FIRMWARE
:{
2685 return megasas_mgmt_compat_ioctl_fw(file
, arg
);
2687 case MEGASAS_IOC_GET_AEN
:
2688 return megasas_mgmt_ioctl_aen(file
, arg
);
2696 * File operations structure for management interface
2698 static struct file_operations megasas_mgmt_fops
= {
2699 .owner
= THIS_MODULE
,
2700 .open
= megasas_mgmt_open
,
2701 .release
= megasas_mgmt_release
,
2702 .fasync
= megasas_mgmt_fasync
,
2703 .unlocked_ioctl
= megasas_mgmt_ioctl
,
2704 #ifdef CONFIG_COMPAT
2705 .compat_ioctl
= megasas_mgmt_compat_ioctl
,
2710 * PCI hotplug support registration structure
2712 static struct pci_driver megasas_pci_driver
= {
2714 .name
= "megaraid_sas",
2715 .id_table
= megasas_pci_table
,
2716 .probe
= megasas_probe_one
,
2717 .remove
= __devexit_p(megasas_detach_one
),
2718 .shutdown
= megasas_shutdown
,
2722 * Sysfs driver attributes
2724 static ssize_t
megasas_sysfs_show_version(struct device_driver
*dd
, char *buf
)
2726 return snprintf(buf
, strlen(MEGASAS_VERSION
) + 2, "%s\n",
2730 static DRIVER_ATTR(version
, S_IRUGO
, megasas_sysfs_show_version
, NULL
);
2733 megasas_sysfs_show_release_date(struct device_driver
*dd
, char *buf
)
2735 return snprintf(buf
, strlen(MEGASAS_RELDATE
) + 2, "%s\n",
2739 static DRIVER_ATTR(release_date
, S_IRUGO
, megasas_sysfs_show_release_date
,
2743 * megasas_init - Driver load entry point
2745 static int __init
megasas_init(void)
2750 * Announce driver version and other information
2752 printk(KERN_INFO
"megasas: %s %s\n", MEGASAS_VERSION
,
2753 MEGASAS_EXT_VERSION
);
2755 memset(&megasas_mgmt_info
, 0, sizeof(megasas_mgmt_info
));
2758 * Register character device node
2760 rval
= register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops
);
2763 printk(KERN_DEBUG
"megasas: failed to open device node\n");
2767 megasas_mgmt_majorno
= rval
;
2770 * Register ourselves as PCI hotplug module
2772 rval
= pci_module_init(&megasas_pci_driver
);
2775 printk(KERN_DEBUG
"megasas: PCI hotplug regisration failed \n");
2776 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
2779 driver_create_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
2780 driver_create_file(&megasas_pci_driver
.driver
,
2781 &driver_attr_release_date
);
2787 * megasas_exit - Driver unload entry point
2789 static void __exit
megasas_exit(void)
2791 driver_remove_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
2792 driver_remove_file(&megasas_pci_driver
.driver
,
2793 &driver_attr_release_date
);
2795 pci_unregister_driver(&megasas_pci_driver
);
2796 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
2799 module_init(megasas_init
);
2800 module_exit(megasas_exit
);