3 * Linux MegaRAID driver for SAS based RAID controllers
5 * Copyright (c) 2003-2005 LSI 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 : v00.00.03.20-rc1
16 * (email-id : megaraidlinux@lsi.com)
21 * List of supported controllers
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
27 #include <linux/kernel.h>
28 #include <linux/types.h>
29 #include <linux/pci.h>
30 #include <linux/list.h>
31 #include <linux/moduleparam.h>
32 #include <linux/module.h>
33 #include <linux/spinlock.h>
34 #include <linux/interrupt.h>
35 #include <linux/delay.h>
36 #include <linux/smp_lock.h>
37 #include <linux/uio.h>
38 #include <asm/uaccess.h>
40 #include <linux/compat.h>
41 #include <linux/blkdev.h>
42 #include <linux/mutex.h>
44 #include <scsi/scsi.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <scsi/scsi_device.h>
47 #include <scsi/scsi_host.h>
48 #include "megaraid_sas.h"
51 * poll_mode_io:1- schedule complete completion from q cmd
53 static unsigned int poll_mode_io
;
54 module_param_named(poll_mode_io
, poll_mode_io
, int, 0);
55 MODULE_PARM_DESC(poll_mode_io
,
56 "Complete cmds from IO path, (default=0)");
58 MODULE_LICENSE("GPL");
59 MODULE_VERSION(MEGASAS_VERSION
);
60 MODULE_AUTHOR("megaraidlinux@lsi.com");
61 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
64 * PCI ID table for all supported controllers
66 static struct pci_device_id megasas_pci_table
[] = {
68 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_SAS1064R
)},
70 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_SAS1078R
)},
72 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_SAS1078DE
)},
74 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_VERDE_ZCR
)},
75 /* xscale IOP, vega */
76 {PCI_DEVICE(PCI_VENDOR_ID_DELL
, PCI_DEVICE_ID_DELL_PERC5
)},
81 MODULE_DEVICE_TABLE(pci
, megasas_pci_table
);
83 static int megasas_mgmt_majorno
;
84 static struct megasas_mgmt_info megasas_mgmt_info
;
85 static struct fasync_struct
*megasas_async_queue
;
86 static DEFINE_MUTEX(megasas_async_queue_mutex
);
88 static u32 megasas_dbg_lvl
;
91 megasas_complete_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
,
95 * megasas_get_cmd - Get a command from the free pool
96 * @instance: Adapter soft state
98 * Returns a free command from the pool
100 static struct megasas_cmd
*megasas_get_cmd(struct megasas_instance
104 struct megasas_cmd
*cmd
= NULL
;
106 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
108 if (!list_empty(&instance
->cmd_pool
)) {
109 cmd
= list_entry((&instance
->cmd_pool
)->next
,
110 struct megasas_cmd
, list
);
111 list_del_init(&cmd
->list
);
113 printk(KERN_ERR
"megasas: Command pool empty!\n");
116 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
121 * megasas_return_cmd - Return a cmd to free command pool
122 * @instance: Adapter soft state
123 * @cmd: Command packet to be returned to free command pool
126 megasas_return_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
130 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
133 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
135 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
140 * The following functions are defined for xscale
141 * (deviceid : 1064R, PERC5) controllers
145 * megasas_enable_intr_xscale - Enables interrupts
146 * @regs: MFI register set
149 megasas_enable_intr_xscale(struct megasas_register_set __iomem
* regs
)
151 writel(1, &(regs
)->outbound_intr_mask
);
153 /* Dummy readl to force pci flush */
154 readl(®s
->outbound_intr_mask
);
158 * megasas_disable_intr_xscale -Disables interrupt
159 * @regs: MFI register set
162 megasas_disable_intr_xscale(struct megasas_register_set __iomem
* regs
)
165 writel(mask
, ®s
->outbound_intr_mask
);
166 /* Dummy readl to force pci flush */
167 readl(®s
->outbound_intr_mask
);
171 * megasas_read_fw_status_reg_xscale - returns the current FW status value
172 * @regs: MFI register set
175 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem
* regs
)
177 return readl(&(regs
)->outbound_msg_0
);
180 * megasas_clear_interrupt_xscale - Check & clear interrupt
181 * @regs: MFI register set
184 megasas_clear_intr_xscale(struct megasas_register_set __iomem
* regs
)
188 * Check if it is our interrupt
190 status
= readl(®s
->outbound_intr_status
);
192 if (!(status
& MFI_OB_INTR_STATUS_MASK
)) {
197 * Clear the interrupt by writing back the same value
199 writel(status
, ®s
->outbound_intr_status
);
205 * megasas_fire_cmd_xscale - Sends command to the FW
206 * @frame_phys_addr : Physical address of cmd
207 * @frame_count : Number of frames for the command
208 * @regs : MFI register set
211 megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr
,u32 frame_count
, struct megasas_register_set __iomem
*regs
)
213 writel((frame_phys_addr
>> 3)|(frame_count
),
214 &(regs
)->inbound_queue_port
);
217 static struct megasas_instance_template megasas_instance_template_xscale
= {
219 .fire_cmd
= megasas_fire_cmd_xscale
,
220 .enable_intr
= megasas_enable_intr_xscale
,
221 .disable_intr
= megasas_disable_intr_xscale
,
222 .clear_intr
= megasas_clear_intr_xscale
,
223 .read_fw_status_reg
= megasas_read_fw_status_reg_xscale
,
227 * This is the end of set of functions & definitions specific
228 * to xscale (deviceid : 1064R, PERC5) controllers
232 * The following functions are defined for ppc (deviceid : 0x60)
237 * megasas_enable_intr_ppc - Enables interrupts
238 * @regs: MFI register set
241 megasas_enable_intr_ppc(struct megasas_register_set __iomem
* regs
)
243 writel(0xFFFFFFFF, &(regs
)->outbound_doorbell_clear
);
245 writel(~0x80000004, &(regs
)->outbound_intr_mask
);
247 /* Dummy readl to force pci flush */
248 readl(®s
->outbound_intr_mask
);
252 * megasas_disable_intr_ppc - Disable interrupt
253 * @regs: MFI register set
256 megasas_disable_intr_ppc(struct megasas_register_set __iomem
* regs
)
258 u32 mask
= 0xFFFFFFFF;
259 writel(mask
, ®s
->outbound_intr_mask
);
260 /* Dummy readl to force pci flush */
261 readl(®s
->outbound_intr_mask
);
265 * megasas_read_fw_status_reg_ppc - returns the current FW status value
266 * @regs: MFI register set
269 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem
* regs
)
271 return readl(&(regs
)->outbound_scratch_pad
);
275 * megasas_clear_interrupt_ppc - Check & clear interrupt
276 * @regs: MFI register set
279 megasas_clear_intr_ppc(struct megasas_register_set __iomem
* regs
)
283 * Check if it is our interrupt
285 status
= readl(®s
->outbound_intr_status
);
287 if (!(status
& MFI_REPLY_1078_MESSAGE_INTERRUPT
)) {
292 * Clear the interrupt by writing back the same value
294 writel(status
, ®s
->outbound_doorbell_clear
);
299 * megasas_fire_cmd_ppc - Sends command to the FW
300 * @frame_phys_addr : Physical address of cmd
301 * @frame_count : Number of frames for the command
302 * @regs : MFI register set
305 megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr
, u32 frame_count
, struct megasas_register_set __iomem
*regs
)
307 writel((frame_phys_addr
| (frame_count
<<1))|1,
308 &(regs
)->inbound_queue_port
);
311 static struct megasas_instance_template megasas_instance_template_ppc
= {
313 .fire_cmd
= megasas_fire_cmd_ppc
,
314 .enable_intr
= megasas_enable_intr_ppc
,
315 .disable_intr
= megasas_disable_intr_ppc
,
316 .clear_intr
= megasas_clear_intr_ppc
,
317 .read_fw_status_reg
= megasas_read_fw_status_reg_ppc
,
321 * This is the end of set of functions & definitions
322 * specific to ppc (deviceid : 0x60) controllers
326 * megasas_issue_polled - Issues a polling command
327 * @instance: Adapter soft state
328 * @cmd: Command packet to be issued
330 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
333 megasas_issue_polled(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
336 u32 msecs
= MFI_POLL_TIMEOUT_SECS
* 1000;
338 struct megasas_header
*frame_hdr
= &cmd
->frame
->hdr
;
340 frame_hdr
->cmd_status
= 0xFF;
341 frame_hdr
->flags
|= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE
;
344 * Issue the frame using inbound queue port
346 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
349 * Wait for cmd_status to change
351 for (i
= 0; (i
< msecs
) && (frame_hdr
->cmd_status
== 0xff); i
++) {
356 if (frame_hdr
->cmd_status
== 0xff)
363 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
364 * @instance: Adapter soft state
365 * @cmd: Command to be issued
367 * This function waits on an event for the command to be returned from ISR.
368 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
369 * Used to issue ioctl commands.
372 megasas_issue_blocked_cmd(struct megasas_instance
*instance
,
373 struct megasas_cmd
*cmd
)
375 cmd
->cmd_status
= ENODATA
;
377 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
379 wait_event_timeout(instance
->int_cmd_wait_q
, (cmd
->cmd_status
!= ENODATA
),
380 MEGASAS_INTERNAL_CMD_WAIT_TIME
*HZ
);
386 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
387 * @instance: Adapter soft state
388 * @cmd_to_abort: Previously issued cmd to be aborted
390 * MFI firmware can abort previously issued AEN comamnd (automatic event
391 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
392 * cmd and waits for return status.
393 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
396 megasas_issue_blocked_abort_cmd(struct megasas_instance
*instance
,
397 struct megasas_cmd
*cmd_to_abort
)
399 struct megasas_cmd
*cmd
;
400 struct megasas_abort_frame
*abort_fr
;
402 cmd
= megasas_get_cmd(instance
);
407 abort_fr
= &cmd
->frame
->abort
;
410 * Prepare and issue the abort frame
412 abort_fr
->cmd
= MFI_CMD_ABORT
;
413 abort_fr
->cmd_status
= 0xFF;
415 abort_fr
->abort_context
= cmd_to_abort
->index
;
416 abort_fr
->abort_mfi_phys_addr_lo
= cmd_to_abort
->frame_phys_addr
;
417 abort_fr
->abort_mfi_phys_addr_hi
= 0;
420 cmd
->cmd_status
= 0xFF;
422 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
425 * Wait for this cmd to complete
427 wait_event_timeout(instance
->abort_cmd_wait_q
, (cmd
->cmd_status
!= 0xFF),
428 MEGASAS_INTERNAL_CMD_WAIT_TIME
*HZ
);
430 megasas_return_cmd(instance
, cmd
);
435 * megasas_make_sgl32 - Prepares 32-bit SGL
436 * @instance: Adapter soft state
437 * @scp: SCSI command from the mid-layer
438 * @mfi_sgl: SGL to be filled in
440 * If successful, this function returns the number of SG elements. Otherwise,
444 megasas_make_sgl32(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
445 union megasas_sgl
*mfi_sgl
)
449 struct scatterlist
*os_sgl
;
451 sge_count
= scsi_dma_map(scp
);
452 BUG_ON(sge_count
< 0);
455 scsi_for_each_sg(scp
, os_sgl
, sge_count
, i
) {
456 mfi_sgl
->sge32
[i
].length
= sg_dma_len(os_sgl
);
457 mfi_sgl
->sge32
[i
].phys_addr
= sg_dma_address(os_sgl
);
464 * megasas_make_sgl64 - Prepares 64-bit SGL
465 * @instance: Adapter soft state
466 * @scp: SCSI command from the mid-layer
467 * @mfi_sgl: SGL to be filled in
469 * If successful, this function returns the number of SG elements. Otherwise,
473 megasas_make_sgl64(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
474 union megasas_sgl
*mfi_sgl
)
478 struct scatterlist
*os_sgl
;
480 sge_count
= scsi_dma_map(scp
);
481 BUG_ON(sge_count
< 0);
484 scsi_for_each_sg(scp
, os_sgl
, sge_count
, i
) {
485 mfi_sgl
->sge64
[i
].length
= sg_dma_len(os_sgl
);
486 mfi_sgl
->sge64
[i
].phys_addr
= sg_dma_address(os_sgl
);
493 * megasas_get_frame_count - Computes the number of frames
494 * @frame_type : type of frame- io or pthru frame
495 * @sge_count : number of sg elements
497 * Returns the number of frames required for numnber of sge's (sge_count)
500 static u32
megasas_get_frame_count(u8 sge_count
, u8 frame_type
)
507 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
508 sizeof(struct megasas_sge32
);
511 * Main frame can contain 2 SGEs for 64-bit SGLs and
512 * 3 SGEs for 32-bit SGLs for ldio &
513 * 1 SGEs for 64-bit SGLs and
514 * 2 SGEs for 32-bit SGLs for pthru frame
516 if (unlikely(frame_type
== PTHRU_FRAME
)) {
518 num_cnt
= sge_count
- 1;
520 num_cnt
= sge_count
- 2;
523 num_cnt
= sge_count
- 2;
525 num_cnt
= sge_count
- 3;
529 sge_bytes
= sge_sz
* num_cnt
;
531 frame_count
= (sge_bytes
/ MEGAMFI_FRAME_SIZE
) +
532 ((sge_bytes
% MEGAMFI_FRAME_SIZE
) ? 1 : 0) ;
543 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
544 * @instance: Adapter soft state
546 * @cmd: Command to be prepared in
548 * This function prepares CDB commands. These are typcially pass-through
549 * commands to the devices.
552 megasas_build_dcdb(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
553 struct megasas_cmd
*cmd
)
558 struct megasas_pthru_frame
*pthru
;
560 is_logical
= MEGASAS_IS_LOGICAL(scp
);
561 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
562 pthru
= (struct megasas_pthru_frame
*)cmd
->frame
;
564 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
565 flags
= MFI_FRAME_DIR_WRITE
;
566 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
567 flags
= MFI_FRAME_DIR_READ
;
568 else if (scp
->sc_data_direction
== PCI_DMA_NONE
)
569 flags
= MFI_FRAME_DIR_NONE
;
572 * Prepare the DCDB frame
574 pthru
->cmd
= (is_logical
) ? MFI_CMD_LD_SCSI_IO
: MFI_CMD_PD_SCSI_IO
;
575 pthru
->cmd_status
= 0x0;
576 pthru
->scsi_status
= 0x0;
577 pthru
->target_id
= device_id
;
578 pthru
->lun
= scp
->device
->lun
;
579 pthru
->cdb_len
= scp
->cmd_len
;
581 pthru
->flags
= flags
;
582 pthru
->data_xfer_len
= scsi_bufflen(scp
);
584 memcpy(pthru
->cdb
, scp
->cmnd
, scp
->cmd_len
);
590 pthru
->flags
|= MFI_FRAME_SGL64
;
591 pthru
->sge_count
= megasas_make_sgl64(instance
, scp
,
594 pthru
->sge_count
= megasas_make_sgl32(instance
, scp
,
598 * Sense info specific
600 pthru
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
601 pthru
->sense_buf_phys_addr_hi
= 0;
602 pthru
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
605 * Compute the total number of frames this command consumes. FW uses
606 * this number to pull sufficient number of frames from host memory.
608 cmd
->frame_count
= megasas_get_frame_count(pthru
->sge_count
,
611 return cmd
->frame_count
;
615 * megasas_build_ldio - Prepares IOs to logical devices
616 * @instance: Adapter soft state
618 * @cmd: Command to to be prepared
620 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
623 megasas_build_ldio(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
624 struct megasas_cmd
*cmd
)
627 u8 sc
= scp
->cmnd
[0];
629 struct megasas_io_frame
*ldio
;
631 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
632 ldio
= (struct megasas_io_frame
*)cmd
->frame
;
634 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
635 flags
= MFI_FRAME_DIR_WRITE
;
636 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
637 flags
= MFI_FRAME_DIR_READ
;
640 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
642 ldio
->cmd
= (sc
& 0x02) ? MFI_CMD_LD_WRITE
: MFI_CMD_LD_READ
;
643 ldio
->cmd_status
= 0x0;
644 ldio
->scsi_status
= 0x0;
645 ldio
->target_id
= device_id
;
647 ldio
->reserved_0
= 0;
650 ldio
->start_lba_hi
= 0;
651 ldio
->access_byte
= (scp
->cmd_len
!= 6) ? scp
->cmnd
[1] : 0;
654 * 6-byte READ(0x08) or WRITE(0x0A) cdb
656 if (scp
->cmd_len
== 6) {
657 ldio
->lba_count
= (u32
) scp
->cmnd
[4];
658 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[1] << 16) |
659 ((u32
) scp
->cmnd
[2] << 8) | (u32
) scp
->cmnd
[3];
661 ldio
->start_lba_lo
&= 0x1FFFFF;
665 * 10-byte READ(0x28) or WRITE(0x2A) cdb
667 else if (scp
->cmd_len
== 10) {
668 ldio
->lba_count
= (u32
) scp
->cmnd
[8] |
669 ((u32
) scp
->cmnd
[7] << 8);
670 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
671 ((u32
) scp
->cmnd
[3] << 16) |
672 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
676 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
678 else if (scp
->cmd_len
== 12) {
679 ldio
->lba_count
= ((u32
) scp
->cmnd
[6] << 24) |
680 ((u32
) scp
->cmnd
[7] << 16) |
681 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
683 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
684 ((u32
) scp
->cmnd
[3] << 16) |
685 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
689 * 16-byte READ(0x88) or WRITE(0x8A) cdb
691 else if (scp
->cmd_len
== 16) {
692 ldio
->lba_count
= ((u32
) scp
->cmnd
[10] << 24) |
693 ((u32
) scp
->cmnd
[11] << 16) |
694 ((u32
) scp
->cmnd
[12] << 8) | (u32
) scp
->cmnd
[13];
696 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[6] << 24) |
697 ((u32
) scp
->cmnd
[7] << 16) |
698 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
700 ldio
->start_lba_hi
= ((u32
) scp
->cmnd
[2] << 24) |
701 ((u32
) scp
->cmnd
[3] << 16) |
702 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
710 ldio
->flags
|= MFI_FRAME_SGL64
;
711 ldio
->sge_count
= megasas_make_sgl64(instance
, scp
, &ldio
->sgl
);
713 ldio
->sge_count
= megasas_make_sgl32(instance
, scp
, &ldio
->sgl
);
716 * Sense info specific
718 ldio
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
719 ldio
->sense_buf_phys_addr_hi
= 0;
720 ldio
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
723 * Compute the total number of frames this command consumes. FW uses
724 * this number to pull sufficient number of frames from host memory.
726 cmd
->frame_count
= megasas_get_frame_count(ldio
->sge_count
, IO_FRAME
);
728 return cmd
->frame_count
;
732 * megasas_is_ldio - Checks if the cmd is for logical drive
733 * @scmd: SCSI command
735 * Called by megasas_queue_command to find out if the command to be queued
736 * is a logical drive command
738 static inline int megasas_is_ldio(struct scsi_cmnd
*cmd
)
740 if (!MEGASAS_IS_LOGICAL(cmd
))
742 switch (cmd
->cmnd
[0]) {
758 * megasas_dump_pending_frames - Dumps the frame address of all pending cmds
760 * @instance: Adapter soft state
763 megasas_dump_pending_frames(struct megasas_instance
*instance
)
765 struct megasas_cmd
*cmd
;
767 union megasas_sgl
*mfi_sgl
;
768 struct megasas_io_frame
*ldio
;
769 struct megasas_pthru_frame
*pthru
;
771 u32 max_cmd
= instance
->max_fw_cmds
;
773 printk(KERN_ERR
"\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance
->host
->host_no
);
774 printk(KERN_ERR
"megasas[%d]: Total OS Pending cmds : %d\n",instance
->host
->host_no
,atomic_read(&instance
->fw_outstanding
));
776 printk(KERN_ERR
"\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance
->host
->host_no
);
778 printk(KERN_ERR
"\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance
->host
->host_no
);
780 printk(KERN_ERR
"megasas[%d]: Pending OS cmds in FW : \n",instance
->host
->host_no
);
781 for (i
= 0; i
< max_cmd
; i
++) {
782 cmd
= instance
->cmd_list
[i
];
785 printk(KERN_ERR
"megasas[%d]: Frame addr :0x%08lx : ",instance
->host
->host_no
,(unsigned long)cmd
->frame_phys_addr
);
786 if (megasas_is_ldio(cmd
->scmd
)){
787 ldio
= (struct megasas_io_frame
*)cmd
->frame
;
788 mfi_sgl
= &ldio
->sgl
;
789 sgcount
= ldio
->sge_count
;
790 printk(KERN_ERR
"megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance
->host
->host_no
, cmd
->frame_count
,ldio
->cmd
,ldio
->target_id
, ldio
->start_lba_lo
,ldio
->start_lba_hi
,ldio
->sense_buf_phys_addr_lo
,sgcount
);
793 pthru
= (struct megasas_pthru_frame
*) cmd
->frame
;
794 mfi_sgl
= &pthru
->sgl
;
795 sgcount
= pthru
->sge_count
;
796 printk(KERN_ERR
"megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance
->host
->host_no
,cmd
->frame_count
,pthru
->cmd
,pthru
->target_id
,pthru
->lun
,pthru
->cdb_len
, pthru
->data_xfer_len
,pthru
->sense_buf_phys_addr_lo
,sgcount
);
798 if(megasas_dbg_lvl
& MEGASAS_DBG_LVL
){
799 for (n
= 0; n
< sgcount
; n
++){
801 printk(KERN_ERR
"megasas: sgl len : 0x%x, sgl addr : 0x%08lx ",mfi_sgl
->sge64
[n
].length
, (unsigned long)mfi_sgl
->sge64
[n
].phys_addr
) ;
803 printk(KERN_ERR
"megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl
->sge32
[n
].length
, mfi_sgl
->sge32
[n
].phys_addr
) ;
806 printk(KERN_ERR
"\n");
808 printk(KERN_ERR
"\nmegasas[%d]: Pending Internal cmds in FW : \n",instance
->host
->host_no
);
809 for (i
= 0; i
< max_cmd
; i
++) {
811 cmd
= instance
->cmd_list
[i
];
813 if(cmd
->sync_cmd
== 1){
814 printk(KERN_ERR
"0x%08lx : ", (unsigned long)cmd
->frame_phys_addr
);
817 printk(KERN_ERR
"megasas[%d]: Dumping Done.\n\n",instance
->host
->host_no
);
821 * megasas_queue_command - Queue entry point
822 * @scmd: SCSI command to be queued
823 * @done: Callback entry point
826 megasas_queue_command(struct scsi_cmnd
*scmd
, void (*done
) (struct scsi_cmnd
*))
829 struct megasas_cmd
*cmd
;
830 struct megasas_instance
*instance
;
832 instance
= (struct megasas_instance
*)
833 scmd
->device
->host
->hostdata
;
835 /* Don't process if we have already declared adapter dead */
836 if (instance
->hw_crit_error
)
837 return SCSI_MLQUEUE_HOST_BUSY
;
839 scmd
->scsi_done
= done
;
842 if (MEGASAS_IS_LOGICAL(scmd
) &&
843 (scmd
->device
->id
>= MEGASAS_MAX_LD
|| scmd
->device
->lun
)) {
844 scmd
->result
= DID_BAD_TARGET
<< 16;
848 switch (scmd
->cmnd
[0]) {
849 case SYNCHRONIZE_CACHE
:
851 * FW takes care of flush cache on its own
852 * No need to send it down
854 scmd
->result
= DID_OK
<< 16;
860 cmd
= megasas_get_cmd(instance
);
862 return SCSI_MLQUEUE_HOST_BUSY
;
865 * Logical drive command
867 if (megasas_is_ldio(scmd
))
868 frame_count
= megasas_build_ldio(instance
, scmd
, cmd
);
870 frame_count
= megasas_build_dcdb(instance
, scmd
, cmd
);
876 scmd
->SCp
.ptr
= (char *)cmd
;
879 * Issue the command to the FW
881 atomic_inc(&instance
->fw_outstanding
);
883 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,cmd
->frame_count
-1,instance
->reg_set
);
885 * Check if we have pend cmds to be completed
887 if (poll_mode_io
&& atomic_read(&instance
->fw_outstanding
))
888 tasklet_schedule(&instance
->isr_tasklet
);
894 megasas_return_cmd(instance
, cmd
);
900 static int megasas_slave_configure(struct scsi_device
*sdev
)
903 * Don't export physical disk devices to the disk driver.
905 * FIXME: Currently we don't export them to the midlayer at all.
906 * That will be fixed once LSI engineers have audited the
907 * firmware for possible issues.
909 if (sdev
->channel
< MEGASAS_MAX_PD_CHANNELS
&& sdev
->type
== TYPE_DISK
)
913 * The RAID firmware may require extended timeouts.
915 if (sdev
->channel
>= MEGASAS_MAX_PD_CHANNELS
)
916 sdev
->timeout
= MEGASAS_DEFAULT_CMD_TIMEOUT
* HZ
;
921 * megasas_complete_cmd_dpc - Returns FW's controller structure
922 * @instance_addr: Address of adapter soft state
924 * Tasklet to complete cmds
926 static void megasas_complete_cmd_dpc(unsigned long instance_addr
)
931 struct megasas_cmd
*cmd
;
932 struct megasas_instance
*instance
=
933 (struct megasas_instance
*)instance_addr
;
936 /* If we have already declared adapter dead, donot complete cmds */
937 if (instance
->hw_crit_error
)
940 spin_lock_irqsave(&instance
->completion_lock
, flags
);
942 producer
= *instance
->producer
;
943 consumer
= *instance
->consumer
;
945 while (consumer
!= producer
) {
946 context
= instance
->reply_queue
[consumer
];
948 cmd
= instance
->cmd_list
[context
];
950 megasas_complete_cmd(instance
, cmd
, DID_OK
);
953 if (consumer
== (instance
->max_fw_cmds
+ 1)) {
958 *instance
->consumer
= producer
;
960 spin_unlock_irqrestore(&instance
->completion_lock
, flags
);
963 * Check if we can restore can_queue
965 if (instance
->flag
& MEGASAS_FW_BUSY
966 && time_after(jiffies
, instance
->last_time
+ 5 * HZ
)
967 && atomic_read(&instance
->fw_outstanding
) < 17) {
969 spin_lock_irqsave(instance
->host
->host_lock
, flags
);
970 instance
->flag
&= ~MEGASAS_FW_BUSY
;
971 instance
->host
->can_queue
=
972 instance
->max_fw_cmds
- MEGASAS_INT_CMDS
;
974 spin_unlock_irqrestore(instance
->host
->host_lock
, flags
);
979 * megasas_wait_for_outstanding - Wait for all outstanding cmds
980 * @instance: Adapter soft state
982 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
983 * complete all its outstanding commands. Returns error if one or more IOs
984 * are pending after this time period. It also marks the controller dead.
986 static int megasas_wait_for_outstanding(struct megasas_instance
*instance
)
989 u32 wait_time
= MEGASAS_RESET_WAIT_TIME
;
991 for (i
= 0; i
< wait_time
; i
++) {
993 int outstanding
= atomic_read(&instance
->fw_outstanding
);
998 if (!(i
% MEGASAS_RESET_NOTICE_INTERVAL
)) {
999 printk(KERN_NOTICE
"megasas: [%2d]waiting for %d "
1000 "commands to complete\n",i
,outstanding
);
1002 * Call cmd completion routine. Cmd to be
1003 * be completed directly without depending on isr.
1005 megasas_complete_cmd_dpc((unsigned long)instance
);
1011 if (atomic_read(&instance
->fw_outstanding
)) {
1013 * Send signal to FW to stop processing any pending cmds.
1014 * The controller will be taken offline by the OS now.
1016 writel(MFI_STOP_ADP
,
1017 &instance
->reg_set
->inbound_doorbell
);
1018 megasas_dump_pending_frames(instance
);
1019 instance
->hw_crit_error
= 1;
1027 * megasas_generic_reset - Generic reset routine
1028 * @scmd: Mid-layer SCSI command
1030 * This routine implements a generic reset handler for device, bus and host
1031 * reset requests. Device, bus and host specific reset handlers can use this
1032 * function after they do their specific tasks.
1034 static int megasas_generic_reset(struct scsi_cmnd
*scmd
)
1037 struct megasas_instance
*instance
;
1039 instance
= (struct megasas_instance
*)scmd
->device
->host
->hostdata
;
1041 scmd_printk(KERN_NOTICE
, scmd
, "megasas: RESET -%ld cmd=%x retries=%x\n",
1042 scmd
->serial_number
, scmd
->cmnd
[0], scmd
->retries
);
1044 if (instance
->hw_crit_error
) {
1045 printk(KERN_ERR
"megasas: cannot recover from previous reset "
1050 ret_val
= megasas_wait_for_outstanding(instance
);
1051 if (ret_val
== SUCCESS
)
1052 printk(KERN_NOTICE
"megasas: reset successful \n");
1054 printk(KERN_ERR
"megasas: failed to do reset\n");
1060 * megasas_reset_timer - quiesce the adapter if required
1063 * Sets the FW busy flag and reduces the host->can_queue if the
1064 * cmd has not been completed within the timeout period.
1067 scsi_eh_timer_return
megasas_reset_timer(struct scsi_cmnd
*scmd
)
1069 struct megasas_cmd
*cmd
= (struct megasas_cmd
*)scmd
->SCp
.ptr
;
1070 struct megasas_instance
*instance
;
1071 unsigned long flags
;
1073 if (time_after(jiffies
, scmd
->jiffies_at_alloc
+
1074 (MEGASAS_DEFAULT_CMD_TIMEOUT
* 2) * HZ
)) {
1075 return EH_NOT_HANDLED
;
1078 instance
= cmd
->instance
;
1079 if (!(instance
->flag
& MEGASAS_FW_BUSY
)) {
1080 /* FW is busy, throttle IO */
1081 spin_lock_irqsave(instance
->host
->host_lock
, flags
);
1083 instance
->host
->can_queue
= 16;
1084 instance
->last_time
= jiffies
;
1085 instance
->flag
|= MEGASAS_FW_BUSY
;
1087 spin_unlock_irqrestore(instance
->host
->host_lock
, flags
);
1089 return EH_RESET_TIMER
;
1093 * megasas_reset_device - Device reset handler entry point
1095 static int megasas_reset_device(struct scsi_cmnd
*scmd
)
1100 * First wait for all commands to complete
1102 ret
= megasas_generic_reset(scmd
);
1108 * megasas_reset_bus_host - Bus & host reset handler entry point
1110 static int megasas_reset_bus_host(struct scsi_cmnd
*scmd
)
1115 * First wait for all commands to complete
1117 ret
= megasas_generic_reset(scmd
);
1123 * megasas_bios_param - Returns disk geometry for a disk
1124 * @sdev: device handle
1125 * @bdev: block device
1126 * @capacity: drive capacity
1127 * @geom: geometry parameters
1130 megasas_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
1131 sector_t capacity
, int geom
[])
1137 /* Default heads (64) & sectors (32) */
1141 tmp
= heads
* sectors
;
1142 cylinders
= capacity
;
1144 sector_div(cylinders
, tmp
);
1147 * Handle extended translation size for logical drives > 1Gb
1150 if (capacity
>= 0x200000) {
1153 tmp
= heads
*sectors
;
1154 cylinders
= capacity
;
1155 sector_div(cylinders
, tmp
);
1160 geom
[2] = cylinders
;
1166 * megasas_service_aen - Processes an event notification
1167 * @instance: Adapter soft state
1168 * @cmd: AEN command completed by the ISR
1170 * For AEN, driver sends a command down to FW that is held by the FW till an
1171 * event occurs. When an event of interest occurs, FW completes the command
1172 * that it was previously holding.
1174 * This routines sends SIGIO signal to processes that have registered with the
1178 megasas_service_aen(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
1181 * Don't signal app if it is just an aborted previously registered aen
1183 if (!cmd
->abort_aen
)
1184 kill_fasync(&megasas_async_queue
, SIGIO
, POLL_IN
);
1188 instance
->aen_cmd
= NULL
;
1189 megasas_return_cmd(instance
, cmd
);
1193 * Scsi host template for megaraid_sas driver
1195 static struct scsi_host_template megasas_template
= {
1197 .module
= THIS_MODULE
,
1198 .name
= "LSI SAS based MegaRAID driver",
1199 .proc_name
= "megaraid_sas",
1200 .slave_configure
= megasas_slave_configure
,
1201 .queuecommand
= megasas_queue_command
,
1202 .eh_device_reset_handler
= megasas_reset_device
,
1203 .eh_bus_reset_handler
= megasas_reset_bus_host
,
1204 .eh_host_reset_handler
= megasas_reset_bus_host
,
1205 .eh_timed_out
= megasas_reset_timer
,
1206 .bios_param
= megasas_bios_param
,
1207 .use_clustering
= ENABLE_CLUSTERING
,
1211 * megasas_complete_int_cmd - Completes an internal command
1212 * @instance: Adapter soft state
1213 * @cmd: Command to be completed
1215 * The megasas_issue_blocked_cmd() function waits for a command to complete
1216 * after it issues a command. This function wakes up that waiting routine by
1217 * calling wake_up() on the wait queue.
1220 megasas_complete_int_cmd(struct megasas_instance
*instance
,
1221 struct megasas_cmd
*cmd
)
1223 cmd
->cmd_status
= cmd
->frame
->io
.cmd_status
;
1225 if (cmd
->cmd_status
== ENODATA
) {
1226 cmd
->cmd_status
= 0;
1228 wake_up(&instance
->int_cmd_wait_q
);
1232 * megasas_complete_abort - Completes aborting a command
1233 * @instance: Adapter soft state
1234 * @cmd: Cmd that was issued to abort another cmd
1236 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
1237 * after it issues an abort on a previously issued command. This function
1238 * wakes up all functions waiting on the same wait queue.
1241 megasas_complete_abort(struct megasas_instance
*instance
,
1242 struct megasas_cmd
*cmd
)
1244 if (cmd
->sync_cmd
) {
1246 cmd
->cmd_status
= 0;
1247 wake_up(&instance
->abort_cmd_wait_q
);
1254 * megasas_complete_cmd - Completes a command
1255 * @instance: Adapter soft state
1256 * @cmd: Command to be completed
1257 * @alt_status: If non-zero, use this value as status to
1258 * SCSI mid-layer instead of the value returned
1259 * by the FW. This should be used if caller wants
1260 * an alternate status (as in the case of aborted
1264 megasas_complete_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
,
1268 struct megasas_header
*hdr
= &cmd
->frame
->hdr
;
1271 cmd
->scmd
->SCp
.ptr
= NULL
;
1275 case MFI_CMD_PD_SCSI_IO
:
1276 case MFI_CMD_LD_SCSI_IO
:
1279 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1280 * issued either through an IO path or an IOCTL path. If it
1281 * was via IOCTL, we will send it to internal completion.
1283 if (cmd
->sync_cmd
) {
1285 megasas_complete_int_cmd(instance
, cmd
);
1289 case MFI_CMD_LD_READ
:
1290 case MFI_CMD_LD_WRITE
:
1293 cmd
->scmd
->result
= alt_status
<< 16;
1299 atomic_dec(&instance
->fw_outstanding
);
1301 scsi_dma_unmap(cmd
->scmd
);
1302 cmd
->scmd
->scsi_done(cmd
->scmd
);
1303 megasas_return_cmd(instance
, cmd
);
1308 switch (hdr
->cmd_status
) {
1311 cmd
->scmd
->result
= DID_OK
<< 16;
1314 case MFI_STAT_SCSI_IO_FAILED
:
1315 case MFI_STAT_LD_INIT_IN_PROGRESS
:
1317 (DID_ERROR
<< 16) | hdr
->scsi_status
;
1320 case MFI_STAT_SCSI_DONE_WITH_ERROR
:
1322 cmd
->scmd
->result
= (DID_OK
<< 16) | hdr
->scsi_status
;
1324 if (hdr
->scsi_status
== SAM_STAT_CHECK_CONDITION
) {
1325 memset(cmd
->scmd
->sense_buffer
, 0,
1326 SCSI_SENSE_BUFFERSIZE
);
1327 memcpy(cmd
->scmd
->sense_buffer
, cmd
->sense
,
1330 cmd
->scmd
->result
|= DRIVER_SENSE
<< 24;
1335 case MFI_STAT_LD_OFFLINE
:
1336 case MFI_STAT_DEVICE_NOT_FOUND
:
1337 cmd
->scmd
->result
= DID_BAD_TARGET
<< 16;
1341 printk(KERN_DEBUG
"megasas: MFI FW status %#x\n",
1343 cmd
->scmd
->result
= DID_ERROR
<< 16;
1347 atomic_dec(&instance
->fw_outstanding
);
1349 scsi_dma_unmap(cmd
->scmd
);
1350 cmd
->scmd
->scsi_done(cmd
->scmd
);
1351 megasas_return_cmd(instance
, cmd
);
1360 * See if got an event notification
1362 if (cmd
->frame
->dcmd
.opcode
== MR_DCMD_CTRL_EVENT_WAIT
)
1363 megasas_service_aen(instance
, cmd
);
1365 megasas_complete_int_cmd(instance
, cmd
);
1371 * Cmd issued to abort another cmd returned
1373 megasas_complete_abort(instance
, cmd
);
1377 printk("megasas: Unknown command completed! [0x%X]\n",
1384 * megasas_deplete_reply_queue - Processes all completed commands
1385 * @instance: Adapter soft state
1386 * @alt_status: Alternate status to be returned to
1387 * SCSI mid-layer instead of the status
1388 * returned by the FW
1391 megasas_deplete_reply_queue(struct megasas_instance
*instance
, u8 alt_status
)
1394 * Check if it is our interrupt
1395 * Clear the interrupt
1397 if(instance
->instancet
->clear_intr(instance
->reg_set
))
1400 if (instance
->hw_crit_error
)
1403 * Schedule the tasklet for cmd completion
1405 tasklet_schedule(&instance
->isr_tasklet
);
1411 * megasas_isr - isr entry point
1413 static irqreturn_t
megasas_isr(int irq
, void *devp
)
1415 return megasas_deplete_reply_queue((struct megasas_instance
*)devp
,
1420 * megasas_transition_to_ready - Move the FW to READY state
1421 * @instance: Adapter soft state
1423 * During the initialization, FW passes can potentially be in any one of
1424 * several possible states. If the FW in operational, waiting-for-handshake
1425 * states, driver must take steps to bring it to ready state. Otherwise, it
1426 * has to wait for the ready state.
1429 megasas_transition_to_ready(struct megasas_instance
* instance
)
1436 fw_state
= instance
->instancet
->read_fw_status_reg(instance
->reg_set
) & MFI_STATE_MASK
;
1438 if (fw_state
!= MFI_STATE_READY
)
1439 printk(KERN_INFO
"megasas: Waiting for FW to come to ready"
1442 while (fw_state
!= MFI_STATE_READY
) {
1446 case MFI_STATE_FAULT
:
1448 printk(KERN_DEBUG
"megasas: FW in FAULT state!!\n");
1451 case MFI_STATE_WAIT_HANDSHAKE
:
1453 * Set the CLR bit in inbound doorbell
1455 writel(MFI_INIT_CLEAR_HANDSHAKE
|MFI_INIT_HOTPLUG
,
1456 &instance
->reg_set
->inbound_doorbell
);
1459 cur_state
= MFI_STATE_WAIT_HANDSHAKE
;
1462 case MFI_STATE_BOOT_MESSAGE_PENDING
:
1463 writel(MFI_INIT_HOTPLUG
,
1464 &instance
->reg_set
->inbound_doorbell
);
1467 cur_state
= MFI_STATE_BOOT_MESSAGE_PENDING
;
1470 case MFI_STATE_OPERATIONAL
:
1472 * Bring it to READY state; assuming max wait 10 secs
1474 instance
->instancet
->disable_intr(instance
->reg_set
);
1475 writel(MFI_RESET_FLAGS
, &instance
->reg_set
->inbound_doorbell
);
1478 cur_state
= MFI_STATE_OPERATIONAL
;
1481 case MFI_STATE_UNDEFINED
:
1483 * This state should not last for more than 2 seconds
1486 cur_state
= MFI_STATE_UNDEFINED
;
1489 case MFI_STATE_BB_INIT
:
1491 cur_state
= MFI_STATE_BB_INIT
;
1494 case MFI_STATE_FW_INIT
:
1496 cur_state
= MFI_STATE_FW_INIT
;
1499 case MFI_STATE_FW_INIT_2
:
1501 cur_state
= MFI_STATE_FW_INIT_2
;
1504 case MFI_STATE_DEVICE_SCAN
:
1506 cur_state
= MFI_STATE_DEVICE_SCAN
;
1509 case MFI_STATE_FLUSH_CACHE
:
1511 cur_state
= MFI_STATE_FLUSH_CACHE
;
1515 printk(KERN_DEBUG
"megasas: Unknown state 0x%x\n",
1521 * The cur_state should not last for more than max_wait secs
1523 for (i
= 0; i
< (max_wait
* 1000); i
++) {
1524 fw_state
= instance
->instancet
->read_fw_status_reg(instance
->reg_set
) &
1527 if (fw_state
== cur_state
) {
1534 * Return error if fw_state hasn't changed after max_wait
1536 if (fw_state
== cur_state
) {
1537 printk(KERN_DEBUG
"FW state [%d] hasn't changed "
1538 "in %d secs\n", fw_state
, max_wait
);
1542 printk(KERN_INFO
"megasas: FW now in Ready state\n");
1548 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1549 * @instance: Adapter soft state
1551 static void megasas_teardown_frame_pool(struct megasas_instance
*instance
)
1554 u32 max_cmd
= instance
->max_fw_cmds
;
1555 struct megasas_cmd
*cmd
;
1557 if (!instance
->frame_dma_pool
)
1561 * Return all frames to pool
1563 for (i
= 0; i
< max_cmd
; i
++) {
1565 cmd
= instance
->cmd_list
[i
];
1568 pci_pool_free(instance
->frame_dma_pool
, cmd
->frame
,
1569 cmd
->frame_phys_addr
);
1572 pci_pool_free(instance
->sense_dma_pool
, cmd
->sense
,
1573 cmd
->sense_phys_addr
);
1577 * Now destroy the pool itself
1579 pci_pool_destroy(instance
->frame_dma_pool
);
1580 pci_pool_destroy(instance
->sense_dma_pool
);
1582 instance
->frame_dma_pool
= NULL
;
1583 instance
->sense_dma_pool
= NULL
;
1587 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1588 * @instance: Adapter soft state
1590 * Each command packet has an embedded DMA memory buffer that is used for
1591 * filling MFI frame and the SG list that immediately follows the frame. This
1592 * function creates those DMA memory buffers for each command packet by using
1593 * PCI pool facility.
1595 static int megasas_create_frame_pool(struct megasas_instance
*instance
)
1603 struct megasas_cmd
*cmd
;
1605 max_cmd
= instance
->max_fw_cmds
;
1608 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1609 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1611 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
1612 sizeof(struct megasas_sge32
);
1615 * Calculated the number of 64byte frames required for SGL
1617 sgl_sz
= sge_sz
* instance
->max_num_sge
;
1618 frame_count
= (sgl_sz
+ MEGAMFI_FRAME_SIZE
- 1) / MEGAMFI_FRAME_SIZE
;
1621 * We need one extra frame for the MFI command
1625 total_sz
= MEGAMFI_FRAME_SIZE
* frame_count
;
1627 * Use DMA pool facility provided by PCI layer
1629 instance
->frame_dma_pool
= pci_pool_create("megasas frame pool",
1630 instance
->pdev
, total_sz
, 64,
1633 if (!instance
->frame_dma_pool
) {
1634 printk(KERN_DEBUG
"megasas: failed to setup frame pool\n");
1638 instance
->sense_dma_pool
= pci_pool_create("megasas sense pool",
1639 instance
->pdev
, 128, 4, 0);
1641 if (!instance
->sense_dma_pool
) {
1642 printk(KERN_DEBUG
"megasas: failed to setup sense pool\n");
1644 pci_pool_destroy(instance
->frame_dma_pool
);
1645 instance
->frame_dma_pool
= NULL
;
1651 * Allocate and attach a frame to each of the commands in cmd_list.
1652 * By making cmd->index as the context instead of the &cmd, we can
1653 * always use 32bit context regardless of the architecture
1655 for (i
= 0; i
< max_cmd
; i
++) {
1657 cmd
= instance
->cmd_list
[i
];
1659 cmd
->frame
= pci_pool_alloc(instance
->frame_dma_pool
,
1660 GFP_KERNEL
, &cmd
->frame_phys_addr
);
1662 cmd
->sense
= pci_pool_alloc(instance
->sense_dma_pool
,
1663 GFP_KERNEL
, &cmd
->sense_phys_addr
);
1666 * megasas_teardown_frame_pool() takes care of freeing
1667 * whatever has been allocated
1669 if (!cmd
->frame
|| !cmd
->sense
) {
1670 printk(KERN_DEBUG
"megasas: pci_pool_alloc failed \n");
1671 megasas_teardown_frame_pool(instance
);
1675 cmd
->frame
->io
.context
= cmd
->index
;
1682 * megasas_free_cmds - Free all the cmds in the free cmd pool
1683 * @instance: Adapter soft state
1685 static void megasas_free_cmds(struct megasas_instance
*instance
)
1688 /* First free the MFI frame pool */
1689 megasas_teardown_frame_pool(instance
);
1691 /* Free all the commands in the cmd_list */
1692 for (i
= 0; i
< instance
->max_fw_cmds
; i
++)
1693 kfree(instance
->cmd_list
[i
]);
1695 /* Free the cmd_list buffer itself */
1696 kfree(instance
->cmd_list
);
1697 instance
->cmd_list
= NULL
;
1699 INIT_LIST_HEAD(&instance
->cmd_pool
);
1703 * megasas_alloc_cmds - Allocates the command packets
1704 * @instance: Adapter soft state
1706 * Each command that is issued to the FW, whether IO commands from the OS or
1707 * internal commands like IOCTLs, are wrapped in local data structure called
1708 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1711 * Each frame has a 32-bit field called context (tag). This context is used
1712 * to get back the megasas_cmd from the frame when a frame gets completed in
1713 * the ISR. Typically the address of the megasas_cmd itself would be used as
1714 * the context. But we wanted to keep the differences between 32 and 64 bit
1715 * systems to the mininum. We always use 32 bit integers for the context. In
1716 * this driver, the 32 bit values are the indices into an array cmd_list.
1717 * This array is used only to look up the megasas_cmd given the context. The
1718 * free commands themselves are maintained in a linked list called cmd_pool.
1720 static int megasas_alloc_cmds(struct megasas_instance
*instance
)
1725 struct megasas_cmd
*cmd
;
1727 max_cmd
= instance
->max_fw_cmds
;
1730 * instance->cmd_list is an array of struct megasas_cmd pointers.
1731 * Allocate the dynamic array first and then allocate individual
1734 instance
->cmd_list
= kcalloc(max_cmd
, sizeof(struct megasas_cmd
*), GFP_KERNEL
);
1736 if (!instance
->cmd_list
) {
1737 printk(KERN_DEBUG
"megasas: out of memory\n");
1742 for (i
= 0; i
< max_cmd
; i
++) {
1743 instance
->cmd_list
[i
] = kmalloc(sizeof(struct megasas_cmd
),
1746 if (!instance
->cmd_list
[i
]) {
1748 for (j
= 0; j
< i
; j
++)
1749 kfree(instance
->cmd_list
[j
]);
1751 kfree(instance
->cmd_list
);
1752 instance
->cmd_list
= NULL
;
1759 * Add all the commands to command pool (instance->cmd_pool)
1761 for (i
= 0; i
< max_cmd
; i
++) {
1762 cmd
= instance
->cmd_list
[i
];
1763 memset(cmd
, 0, sizeof(struct megasas_cmd
));
1765 cmd
->instance
= instance
;
1767 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
1771 * Create a frame pool and assign one frame to each cmd
1773 if (megasas_create_frame_pool(instance
)) {
1774 printk(KERN_DEBUG
"megasas: Error creating frame DMA pool\n");
1775 megasas_free_cmds(instance
);
1782 * megasas_get_controller_info - Returns FW's controller structure
1783 * @instance: Adapter soft state
1784 * @ctrl_info: Controller information structure
1786 * Issues an internal command (DCMD) to get the FW's controller structure.
1787 * This information is mainly used to find out the maximum IO transfer per
1788 * command supported by the FW.
1791 megasas_get_ctrl_info(struct megasas_instance
*instance
,
1792 struct megasas_ctrl_info
*ctrl_info
)
1795 struct megasas_cmd
*cmd
;
1796 struct megasas_dcmd_frame
*dcmd
;
1797 struct megasas_ctrl_info
*ci
;
1798 dma_addr_t ci_h
= 0;
1800 cmd
= megasas_get_cmd(instance
);
1803 printk(KERN_DEBUG
"megasas: Failed to get a free cmd\n");
1807 dcmd
= &cmd
->frame
->dcmd
;
1809 ci
= pci_alloc_consistent(instance
->pdev
,
1810 sizeof(struct megasas_ctrl_info
), &ci_h
);
1813 printk(KERN_DEBUG
"Failed to alloc mem for ctrl info\n");
1814 megasas_return_cmd(instance
, cmd
);
1818 memset(ci
, 0, sizeof(*ci
));
1819 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
1821 dcmd
->cmd
= MFI_CMD_DCMD
;
1822 dcmd
->cmd_status
= 0xFF;
1823 dcmd
->sge_count
= 1;
1824 dcmd
->flags
= MFI_FRAME_DIR_READ
;
1826 dcmd
->data_xfer_len
= sizeof(struct megasas_ctrl_info
);
1827 dcmd
->opcode
= MR_DCMD_CTRL_GET_INFO
;
1828 dcmd
->sgl
.sge32
[0].phys_addr
= ci_h
;
1829 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_ctrl_info
);
1831 if (!megasas_issue_polled(instance
, cmd
)) {
1833 memcpy(ctrl_info
, ci
, sizeof(struct megasas_ctrl_info
));
1838 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_ctrl_info
),
1841 megasas_return_cmd(instance
, cmd
);
1846 * megasas_issue_init_mfi - Initializes the FW
1847 * @instance: Adapter soft state
1849 * Issues the INIT MFI cmd
1852 megasas_issue_init_mfi(struct megasas_instance
*instance
)
1856 struct megasas_cmd
*cmd
;
1858 struct megasas_init_frame
*init_frame
;
1859 struct megasas_init_queue_info
*initq_info
;
1860 dma_addr_t init_frame_h
;
1861 dma_addr_t initq_info_h
;
1864 * Prepare a init frame. Note the init frame points to queue info
1865 * structure. Each frame has SGL allocated after first 64 bytes. For
1866 * this frame - since we don't need any SGL - we use SGL's space as
1867 * queue info structure
1869 * We will not get a NULL command below. We just created the pool.
1871 cmd
= megasas_get_cmd(instance
);
1873 init_frame
= (struct megasas_init_frame
*)cmd
->frame
;
1874 initq_info
= (struct megasas_init_queue_info
*)
1875 ((unsigned long)init_frame
+ 64);
1877 init_frame_h
= cmd
->frame_phys_addr
;
1878 initq_info_h
= init_frame_h
+ 64;
1880 context
= init_frame
->context
;
1881 memset(init_frame
, 0, MEGAMFI_FRAME_SIZE
);
1882 memset(initq_info
, 0, sizeof(struct megasas_init_queue_info
));
1883 init_frame
->context
= context
;
1885 initq_info
->reply_queue_entries
= instance
->max_fw_cmds
+ 1;
1886 initq_info
->reply_queue_start_phys_addr_lo
= instance
->reply_queue_h
;
1888 initq_info
->producer_index_phys_addr_lo
= instance
->producer_h
;
1889 initq_info
->consumer_index_phys_addr_lo
= instance
->consumer_h
;
1891 init_frame
->cmd
= MFI_CMD_INIT
;
1892 init_frame
->cmd_status
= 0xFF;
1893 init_frame
->queue_info_new_phys_addr_lo
= initq_info_h
;
1895 init_frame
->data_xfer_len
= sizeof(struct megasas_init_queue_info
);
1898 * disable the intr before firing the init frame to FW
1900 instance
->instancet
->disable_intr(instance
->reg_set
);
1903 * Issue the init frame in polled mode
1906 if (megasas_issue_polled(instance
, cmd
)) {
1907 printk(KERN_ERR
"megasas: Failed to init firmware\n");
1908 megasas_return_cmd(instance
, cmd
);
1912 megasas_return_cmd(instance
, cmd
);
1921 * megasas_start_timer - Initializes a timer object
1922 * @instance: Adapter soft state
1923 * @timer: timer object to be initialized
1924 * @fn: timer function
1925 * @interval: time interval between timer function call
1928 megasas_start_timer(struct megasas_instance
*instance
,
1929 struct timer_list
*timer
,
1930 void *fn
, unsigned long interval
)
1933 timer
->expires
= jiffies
+ interval
;
1934 timer
->data
= (unsigned long)instance
;
1935 timer
->function
= fn
;
1940 * megasas_io_completion_timer - Timer fn
1941 * @instance_addr: Address of adapter soft state
1943 * Schedules tasklet for cmd completion
1944 * if poll_mode_io is set
1947 megasas_io_completion_timer(unsigned long instance_addr
)
1949 struct megasas_instance
*instance
=
1950 (struct megasas_instance
*)instance_addr
;
1952 if (atomic_read(&instance
->fw_outstanding
))
1953 tasklet_schedule(&instance
->isr_tasklet
);
1957 mod_timer(&instance
->io_completion_timer
,
1958 jiffies
+ MEGASAS_COMPLETION_TIMER_INTERVAL
);
1962 * megasas_init_mfi - Initializes the FW
1963 * @instance: Adapter soft state
1965 * This is the main function for initializing MFI firmware.
1967 static int megasas_init_mfi(struct megasas_instance
*instance
)
1974 struct megasas_register_set __iomem
*reg_set
;
1975 struct megasas_ctrl_info
*ctrl_info
;
1977 * Map the message registers
1979 instance
->base_addr
= pci_resource_start(instance
->pdev
, 0);
1981 if (pci_request_regions(instance
->pdev
, "megasas: LSI")) {
1982 printk(KERN_DEBUG
"megasas: IO memory region busy!\n");
1986 instance
->reg_set
= ioremap_nocache(instance
->base_addr
, 8192);
1988 if (!instance
->reg_set
) {
1989 printk(KERN_DEBUG
"megasas: Failed to map IO mem\n");
1993 reg_set
= instance
->reg_set
;
1995 switch(instance
->pdev
->device
)
1997 case PCI_DEVICE_ID_LSI_SAS1078R
:
1998 case PCI_DEVICE_ID_LSI_SAS1078DE
:
1999 instance
->instancet
= &megasas_instance_template_ppc
;
2001 case PCI_DEVICE_ID_LSI_SAS1064R
:
2002 case PCI_DEVICE_ID_DELL_PERC5
:
2004 instance
->instancet
= &megasas_instance_template_xscale
;
2009 * We expect the FW state to be READY
2011 if (megasas_transition_to_ready(instance
))
2012 goto fail_ready_state
;
2015 * Get various operational parameters from status register
2017 instance
->max_fw_cmds
= instance
->instancet
->read_fw_status_reg(reg_set
) & 0x00FFFF;
2019 * Reduce the max supported cmds by 1. This is to ensure that the
2020 * reply_q_sz (1 more than the max cmd that driver may send)
2021 * does not exceed max cmds that the FW can support
2023 instance
->max_fw_cmds
= instance
->max_fw_cmds
-1;
2024 instance
->max_num_sge
= (instance
->instancet
->read_fw_status_reg(reg_set
) & 0xFF0000) >>
2027 * Create a pool of commands
2029 if (megasas_alloc_cmds(instance
))
2030 goto fail_alloc_cmds
;
2033 * Allocate memory for reply queue. Length of reply queue should
2034 * be _one_ more than the maximum commands handled by the firmware.
2036 * Note: When FW completes commands, it places corresponding contex
2037 * values in this circular reply queue. This circular queue is a fairly
2038 * typical producer-consumer queue. FW is the producer (of completed
2039 * commands) and the driver is the consumer.
2041 context_sz
= sizeof(u32
);
2042 reply_q_sz
= context_sz
* (instance
->max_fw_cmds
+ 1);
2044 instance
->reply_queue
= pci_alloc_consistent(instance
->pdev
,
2046 &instance
->reply_queue_h
);
2048 if (!instance
->reply_queue
) {
2049 printk(KERN_DEBUG
"megasas: Out of DMA mem for reply queue\n");
2050 goto fail_reply_queue
;
2053 if (megasas_issue_init_mfi(instance
))
2056 ctrl_info
= kmalloc(sizeof(struct megasas_ctrl_info
), GFP_KERNEL
);
2059 * Compute the max allowed sectors per IO: The controller info has two
2060 * limits on max sectors. Driver should use the minimum of these two.
2062 * 1 << stripe_sz_ops.min = max sectors per strip
2064 * Note that older firmwares ( < FW ver 30) didn't report information
2065 * to calculate max_sectors_1. So the number ended up as zero always.
2068 if (ctrl_info
&& !megasas_get_ctrl_info(instance
, ctrl_info
)) {
2070 max_sectors_1
= (1 << ctrl_info
->stripe_sz_ops
.min
) *
2071 ctrl_info
->max_strips_per_io
;
2072 max_sectors_2
= ctrl_info
->max_request_size
;
2074 tmp_sectors
= min_t(u32
, max_sectors_1
, max_sectors_2
);
2077 instance
->max_sectors_per_req
= instance
->max_num_sge
*
2079 if (tmp_sectors
&& (instance
->max_sectors_per_req
> tmp_sectors
))
2080 instance
->max_sectors_per_req
= tmp_sectors
;
2085 * Setup tasklet for cmd completion
2088 tasklet_init(&instance
->isr_tasklet
, megasas_complete_cmd_dpc
,
2089 (unsigned long)instance
);
2091 /* Initialize the cmd completion timer */
2093 megasas_start_timer(instance
, &instance
->io_completion_timer
,
2094 megasas_io_completion_timer
,
2095 MEGASAS_COMPLETION_TIMER_INTERVAL
);
2100 pci_free_consistent(instance
->pdev
, reply_q_sz
,
2101 instance
->reply_queue
, instance
->reply_queue_h
);
2103 megasas_free_cmds(instance
);
2107 iounmap(instance
->reg_set
);
2110 pci_release_regions(instance
->pdev
);
2116 * megasas_release_mfi - Reverses the FW initialization
2117 * @intance: Adapter soft state
2119 static void megasas_release_mfi(struct megasas_instance
*instance
)
2121 u32 reply_q_sz
= sizeof(u32
) * (instance
->max_fw_cmds
+ 1);
2123 pci_free_consistent(instance
->pdev
, reply_q_sz
,
2124 instance
->reply_queue
, instance
->reply_queue_h
);
2126 megasas_free_cmds(instance
);
2128 iounmap(instance
->reg_set
);
2130 pci_release_regions(instance
->pdev
);
2134 * megasas_get_seq_num - Gets latest event sequence numbers
2135 * @instance: Adapter soft state
2136 * @eli: FW event log sequence numbers information
2138 * FW maintains a log of all events in a non-volatile area. Upper layers would
2139 * usually find out the latest sequence number of the events, the seq number at
2140 * the boot etc. They would "read" all the events below the latest seq number
2141 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
2142 * number), they would subsribe to AEN (asynchronous event notification) and
2143 * wait for the events to happen.
2146 megasas_get_seq_num(struct megasas_instance
*instance
,
2147 struct megasas_evt_log_info
*eli
)
2149 struct megasas_cmd
*cmd
;
2150 struct megasas_dcmd_frame
*dcmd
;
2151 struct megasas_evt_log_info
*el_info
;
2152 dma_addr_t el_info_h
= 0;
2154 cmd
= megasas_get_cmd(instance
);
2160 dcmd
= &cmd
->frame
->dcmd
;
2161 el_info
= pci_alloc_consistent(instance
->pdev
,
2162 sizeof(struct megasas_evt_log_info
),
2166 megasas_return_cmd(instance
, cmd
);
2170 memset(el_info
, 0, sizeof(*el_info
));
2171 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2173 dcmd
->cmd
= MFI_CMD_DCMD
;
2174 dcmd
->cmd_status
= 0x0;
2175 dcmd
->sge_count
= 1;
2176 dcmd
->flags
= MFI_FRAME_DIR_READ
;
2178 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_log_info
);
2179 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_GET_INFO
;
2180 dcmd
->sgl
.sge32
[0].phys_addr
= el_info_h
;
2181 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_log_info
);
2183 megasas_issue_blocked_cmd(instance
, cmd
);
2186 * Copy the data back into callers buffer
2188 memcpy(eli
, el_info
, sizeof(struct megasas_evt_log_info
));
2190 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_evt_log_info
),
2191 el_info
, el_info_h
);
2193 megasas_return_cmd(instance
, cmd
);
2199 * megasas_register_aen - Registers for asynchronous event notification
2200 * @instance: Adapter soft state
2201 * @seq_num: The starting sequence number
2202 * @class_locale: Class of the event
2204 * This function subscribes for AEN for events beyond the @seq_num. It requests
2205 * to be notified if and only if the event is of type @class_locale
2208 megasas_register_aen(struct megasas_instance
*instance
, u32 seq_num
,
2209 u32 class_locale_word
)
2212 struct megasas_cmd
*cmd
;
2213 struct megasas_dcmd_frame
*dcmd
;
2214 union megasas_evt_class_locale curr_aen
;
2215 union megasas_evt_class_locale prev_aen
;
2218 * If there an AEN pending already (aen_cmd), check if the
2219 * class_locale of that pending AEN is inclusive of the new
2220 * AEN request we currently have. If it is, then we don't have
2221 * to do anything. In other words, whichever events the current
2222 * AEN request is subscribing to, have already been subscribed
2225 * If the old_cmd is _not_ inclusive, then we have to abort
2226 * that command, form a class_locale that is superset of both
2227 * old and current and re-issue to the FW
2230 curr_aen
.word
= class_locale_word
;
2232 if (instance
->aen_cmd
) {
2234 prev_aen
.word
= instance
->aen_cmd
->frame
->dcmd
.mbox
.w
[1];
2237 * A class whose enum value is smaller is inclusive of all
2238 * higher values. If a PROGRESS (= -1) was previously
2239 * registered, then a new registration requests for higher
2240 * classes need not be sent to FW. They are automatically
2243 * Locale numbers don't have such hierarchy. They are bitmap
2246 if ((prev_aen
.members
.class <= curr_aen
.members
.class) &&
2247 !((prev_aen
.members
.locale
& curr_aen
.members
.locale
) ^
2248 curr_aen
.members
.locale
)) {
2250 * Previously issued event registration includes
2251 * current request. Nothing to do.
2255 curr_aen
.members
.locale
|= prev_aen
.members
.locale
;
2257 if (prev_aen
.members
.class < curr_aen
.members
.class)
2258 curr_aen
.members
.class = prev_aen
.members
.class;
2260 instance
->aen_cmd
->abort_aen
= 1;
2261 ret_val
= megasas_issue_blocked_abort_cmd(instance
,
2266 printk(KERN_DEBUG
"megasas: Failed to abort "
2267 "previous AEN command\n");
2273 cmd
= megasas_get_cmd(instance
);
2278 dcmd
= &cmd
->frame
->dcmd
;
2280 memset(instance
->evt_detail
, 0, sizeof(struct megasas_evt_detail
));
2283 * Prepare DCMD for aen registration
2285 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2287 dcmd
->cmd
= MFI_CMD_DCMD
;
2288 dcmd
->cmd_status
= 0x0;
2289 dcmd
->sge_count
= 1;
2290 dcmd
->flags
= MFI_FRAME_DIR_READ
;
2292 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_detail
);
2293 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_WAIT
;
2294 dcmd
->mbox
.w
[0] = seq_num
;
2295 dcmd
->mbox
.w
[1] = curr_aen
.word
;
2296 dcmd
->sgl
.sge32
[0].phys_addr
= (u32
) instance
->evt_detail_h
;
2297 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_detail
);
2300 * Store reference to the cmd used to register for AEN. When an
2301 * application wants us to register for AEN, we have to abort this
2302 * cmd and re-register with a new EVENT LOCALE supplied by that app
2304 instance
->aen_cmd
= cmd
;
2307 * Issue the aen registration frame
2309 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
2315 * megasas_start_aen - Subscribes to AEN during driver load time
2316 * @instance: Adapter soft state
2318 static int megasas_start_aen(struct megasas_instance
*instance
)
2320 struct megasas_evt_log_info eli
;
2321 union megasas_evt_class_locale class_locale
;
2324 * Get the latest sequence number from FW
2326 memset(&eli
, 0, sizeof(eli
));
2328 if (megasas_get_seq_num(instance
, &eli
))
2332 * Register AEN with FW for latest sequence number plus 1
2334 class_locale
.members
.reserved
= 0;
2335 class_locale
.members
.locale
= MR_EVT_LOCALE_ALL
;
2336 class_locale
.members
.class = MR_EVT_CLASS_DEBUG
;
2338 return megasas_register_aen(instance
, eli
.newest_seq_num
+ 1,
2343 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2344 * @instance: Adapter soft state
2346 static int megasas_io_attach(struct megasas_instance
*instance
)
2348 struct Scsi_Host
*host
= instance
->host
;
2351 * Export parameters required by SCSI mid-layer
2353 host
->irq
= instance
->pdev
->irq
;
2354 host
->unique_id
= instance
->unique_id
;
2355 host
->can_queue
= instance
->max_fw_cmds
- MEGASAS_INT_CMDS
;
2356 host
->this_id
= instance
->init_id
;
2357 host
->sg_tablesize
= instance
->max_num_sge
;
2358 host
->max_sectors
= instance
->max_sectors_per_req
;
2359 host
->cmd_per_lun
= 128;
2360 host
->max_channel
= MEGASAS_MAX_CHANNELS
- 1;
2361 host
->max_id
= MEGASAS_MAX_DEV_PER_CHANNEL
;
2362 host
->max_lun
= MEGASAS_MAX_LUN
;
2363 host
->max_cmd_len
= 16;
2366 * Notify the mid-layer about the new controller
2368 if (scsi_add_host(host
, &instance
->pdev
->dev
)) {
2369 printk(KERN_DEBUG
"megasas: scsi_add_host failed\n");
2374 * Trigger SCSI to scan our drives
2376 scsi_scan_host(host
);
2381 megasas_set_dma_mask(struct pci_dev
*pdev
)
2384 * All our contollers are capable of performing 64-bit DMA
2387 if (pci_set_dma_mask(pdev
, DMA_64BIT_MASK
) != 0) {
2389 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2390 goto fail_set_dma_mask
;
2393 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2394 goto fail_set_dma_mask
;
2403 * megasas_probe_one - PCI hotplug entry point
2404 * @pdev: PCI device structure
2405 * @id: PCI ids of supported hotplugged adapter
2407 static int __devinit
2408 megasas_probe_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
2411 struct Scsi_Host
*host
;
2412 struct megasas_instance
*instance
;
2415 * Announce PCI information
2417 printk(KERN_INFO
"megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2418 pdev
->vendor
, pdev
->device
, pdev
->subsystem_vendor
,
2419 pdev
->subsystem_device
);
2421 printk("bus %d:slot %d:func %d\n",
2422 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
), PCI_FUNC(pdev
->devfn
));
2425 * PCI prepping: enable device set bus mastering and dma mask
2427 rval
= pci_enable_device(pdev
);
2433 pci_set_master(pdev
);
2435 if (megasas_set_dma_mask(pdev
))
2436 goto fail_set_dma_mask
;
2438 host
= scsi_host_alloc(&megasas_template
,
2439 sizeof(struct megasas_instance
));
2442 printk(KERN_DEBUG
"megasas: scsi_host_alloc failed\n");
2443 goto fail_alloc_instance
;
2446 instance
= (struct megasas_instance
*)host
->hostdata
;
2447 memset(instance
, 0, sizeof(*instance
));
2449 instance
->producer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2450 &instance
->producer_h
);
2451 instance
->consumer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2452 &instance
->consumer_h
);
2454 if (!instance
->producer
|| !instance
->consumer
) {
2455 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2456 "producer, consumer\n");
2457 goto fail_alloc_dma_buf
;
2460 *instance
->producer
= 0;
2461 *instance
->consumer
= 0;
2463 instance
->evt_detail
= pci_alloc_consistent(pdev
,
2465 megasas_evt_detail
),
2466 &instance
->evt_detail_h
);
2468 if (!instance
->evt_detail
) {
2469 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2470 "event detail structure\n");
2471 goto fail_alloc_dma_buf
;
2475 * Initialize locks and queues
2477 INIT_LIST_HEAD(&instance
->cmd_pool
);
2479 atomic_set(&instance
->fw_outstanding
,0);
2481 init_waitqueue_head(&instance
->int_cmd_wait_q
);
2482 init_waitqueue_head(&instance
->abort_cmd_wait_q
);
2484 spin_lock_init(&instance
->cmd_pool_lock
);
2485 spin_lock_init(&instance
->completion_lock
);
2487 mutex_init(&instance
->aen_mutex
);
2488 sema_init(&instance
->ioctl_sem
, MEGASAS_INT_CMDS
);
2491 * Initialize PCI related and misc parameters
2493 instance
->pdev
= pdev
;
2494 instance
->host
= host
;
2495 instance
->unique_id
= pdev
->bus
->number
<< 8 | pdev
->devfn
;
2496 instance
->init_id
= MEGASAS_DEFAULT_INIT_ID
;
2498 megasas_dbg_lvl
= 0;
2500 instance
->last_time
= 0;
2503 * Initialize MFI Firmware
2505 if (megasas_init_mfi(instance
))
2511 if (request_irq(pdev
->irq
, megasas_isr
, IRQF_SHARED
, "megasas", instance
)) {
2512 printk(KERN_DEBUG
"megasas: Failed to register IRQ\n");
2516 instance
->instancet
->enable_intr(instance
->reg_set
);
2519 * Store instance in PCI softstate
2521 pci_set_drvdata(pdev
, instance
);
2524 * Add this controller to megasas_mgmt_info structure so that it
2525 * can be exported to management applications
2527 megasas_mgmt_info
.count
++;
2528 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = instance
;
2529 megasas_mgmt_info
.max_index
++;
2532 * Initiate AEN (Asynchronous Event Notification)
2534 if (megasas_start_aen(instance
)) {
2535 printk(KERN_DEBUG
"megasas: start aen failed\n");
2536 goto fail_start_aen
;
2540 * Register with SCSI mid-layer
2542 if (megasas_io_attach(instance
))
2543 goto fail_io_attach
;
2549 megasas_mgmt_info
.count
--;
2550 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = NULL
;
2551 megasas_mgmt_info
.max_index
--;
2553 pci_set_drvdata(pdev
, NULL
);
2554 instance
->instancet
->disable_intr(instance
->reg_set
);
2555 free_irq(instance
->pdev
->irq
, instance
);
2557 megasas_release_mfi(instance
);
2562 if (instance
->evt_detail
)
2563 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2564 instance
->evt_detail
,
2565 instance
->evt_detail_h
);
2567 if (instance
->producer
)
2568 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2569 instance
->producer_h
);
2570 if (instance
->consumer
)
2571 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2572 instance
->consumer_h
);
2573 scsi_host_put(host
);
2575 fail_alloc_instance
:
2577 pci_disable_device(pdev
);
2583 * megasas_flush_cache - Requests FW to flush all its caches
2584 * @instance: Adapter soft state
2586 static void megasas_flush_cache(struct megasas_instance
*instance
)
2588 struct megasas_cmd
*cmd
;
2589 struct megasas_dcmd_frame
*dcmd
;
2591 cmd
= megasas_get_cmd(instance
);
2596 dcmd
= &cmd
->frame
->dcmd
;
2598 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2600 dcmd
->cmd
= MFI_CMD_DCMD
;
2601 dcmd
->cmd_status
= 0x0;
2602 dcmd
->sge_count
= 0;
2603 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2605 dcmd
->data_xfer_len
= 0;
2606 dcmd
->opcode
= MR_DCMD_CTRL_CACHE_FLUSH
;
2607 dcmd
->mbox
.b
[0] = MR_FLUSH_CTRL_CACHE
| MR_FLUSH_DISK_CACHE
;
2609 megasas_issue_blocked_cmd(instance
, cmd
);
2611 megasas_return_cmd(instance
, cmd
);
2617 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2618 * @instance: Adapter soft state
2619 * @opcode: Shutdown/Hibernate
2621 static void megasas_shutdown_controller(struct megasas_instance
*instance
,
2624 struct megasas_cmd
*cmd
;
2625 struct megasas_dcmd_frame
*dcmd
;
2627 cmd
= megasas_get_cmd(instance
);
2632 if (instance
->aen_cmd
)
2633 megasas_issue_blocked_abort_cmd(instance
, instance
->aen_cmd
);
2635 dcmd
= &cmd
->frame
->dcmd
;
2637 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2639 dcmd
->cmd
= MFI_CMD_DCMD
;
2640 dcmd
->cmd_status
= 0x0;
2641 dcmd
->sge_count
= 0;
2642 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2644 dcmd
->data_xfer_len
= 0;
2645 dcmd
->opcode
= opcode
;
2647 megasas_issue_blocked_cmd(instance
, cmd
);
2649 megasas_return_cmd(instance
, cmd
);
2656 * megasas_suspend - driver suspend entry point
2657 * @pdev: PCI device structure
2658 * @state: PCI power state to suspend routine
2661 megasas_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2663 struct Scsi_Host
*host
;
2664 struct megasas_instance
*instance
;
2666 instance
= pci_get_drvdata(pdev
);
2667 host
= instance
->host
;
2670 del_timer_sync(&instance
->io_completion_timer
);
2672 megasas_flush_cache(instance
);
2673 megasas_shutdown_controller(instance
, MR_DCMD_HIBERNATE_SHUTDOWN
);
2674 tasklet_kill(&instance
->isr_tasklet
);
2676 pci_set_drvdata(instance
->pdev
, instance
);
2677 instance
->instancet
->disable_intr(instance
->reg_set
);
2678 free_irq(instance
->pdev
->irq
, instance
);
2680 pci_save_state(pdev
);
2681 pci_disable_device(pdev
);
2683 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
2689 * megasas_resume- driver resume entry point
2690 * @pdev: PCI device structure
2693 megasas_resume(struct pci_dev
*pdev
)
2696 struct Scsi_Host
*host
;
2697 struct megasas_instance
*instance
;
2699 instance
= pci_get_drvdata(pdev
);
2700 host
= instance
->host
;
2701 pci_set_power_state(pdev
, PCI_D0
);
2702 pci_enable_wake(pdev
, PCI_D0
, 0);
2703 pci_restore_state(pdev
);
2706 * PCI prepping: enable device set bus mastering and dma mask
2708 rval
= pci_enable_device(pdev
);
2711 printk(KERN_ERR
"megasas: Enable device failed\n");
2715 pci_set_master(pdev
);
2717 if (megasas_set_dma_mask(pdev
))
2718 goto fail_set_dma_mask
;
2721 * Initialize MFI Firmware
2724 *instance
->producer
= 0;
2725 *instance
->consumer
= 0;
2727 atomic_set(&instance
->fw_outstanding
, 0);
2730 * We expect the FW state to be READY
2732 if (megasas_transition_to_ready(instance
))
2733 goto fail_ready_state
;
2735 if (megasas_issue_init_mfi(instance
))
2738 tasklet_init(&instance
->isr_tasklet
, megasas_complete_cmd_dpc
,
2739 (unsigned long)instance
);
2744 if (request_irq(pdev
->irq
, megasas_isr
, IRQF_SHARED
,
2745 "megasas", instance
)) {
2746 printk(KERN_ERR
"megasas: Failed to register IRQ\n");
2750 instance
->instancet
->enable_intr(instance
->reg_set
);
2753 * Initiate AEN (Asynchronous Event Notification)
2755 if (megasas_start_aen(instance
))
2756 printk(KERN_ERR
"megasas: Start AEN failed\n");
2758 /* Initialize the cmd completion timer */
2760 megasas_start_timer(instance
, &instance
->io_completion_timer
,
2761 megasas_io_completion_timer
,
2762 MEGASAS_COMPLETION_TIMER_INTERVAL
);
2767 if (instance
->evt_detail
)
2768 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2769 instance
->evt_detail
,
2770 instance
->evt_detail_h
);
2772 if (instance
->producer
)
2773 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2774 instance
->producer_h
);
2775 if (instance
->consumer
)
2776 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2777 instance
->consumer_h
);
2778 scsi_host_put(host
);
2783 pci_disable_device(pdev
);
2788 #define megasas_suspend NULL
2789 #define megasas_resume NULL
2793 * megasas_detach_one - PCI hot"un"plug entry point
2794 * @pdev: PCI device structure
2796 static void __devexit
megasas_detach_one(struct pci_dev
*pdev
)
2799 struct Scsi_Host
*host
;
2800 struct megasas_instance
*instance
;
2802 instance
= pci_get_drvdata(pdev
);
2803 host
= instance
->host
;
2806 del_timer_sync(&instance
->io_completion_timer
);
2808 scsi_remove_host(instance
->host
);
2809 megasas_flush_cache(instance
);
2810 megasas_shutdown_controller(instance
, MR_DCMD_CTRL_SHUTDOWN
);
2811 tasklet_kill(&instance
->isr_tasklet
);
2814 * Take the instance off the instance array. Note that we will not
2815 * decrement the max_index. We let this array be sparse array
2817 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
2818 if (megasas_mgmt_info
.instance
[i
] == instance
) {
2819 megasas_mgmt_info
.count
--;
2820 megasas_mgmt_info
.instance
[i
] = NULL
;
2826 pci_set_drvdata(instance
->pdev
, NULL
);
2828 instance
->instancet
->disable_intr(instance
->reg_set
);
2830 free_irq(instance
->pdev
->irq
, instance
);
2832 megasas_release_mfi(instance
);
2834 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2835 instance
->evt_detail
, instance
->evt_detail_h
);
2837 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2838 instance
->producer_h
);
2840 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2841 instance
->consumer_h
);
2843 scsi_host_put(host
);
2845 pci_set_drvdata(pdev
, NULL
);
2847 pci_disable_device(pdev
);
2853 * megasas_shutdown - Shutdown entry point
2854 * @device: Generic device structure
2856 static void megasas_shutdown(struct pci_dev
*pdev
)
2858 struct megasas_instance
*instance
= pci_get_drvdata(pdev
);
2859 megasas_flush_cache(instance
);
2863 * megasas_mgmt_open - char node "open" entry point
2865 static int megasas_mgmt_open(struct inode
*inode
, struct file
*filep
)
2867 cycle_kernel_lock();
2869 * Allow only those users with admin rights
2871 if (!capable(CAP_SYS_ADMIN
))
2878 * megasas_mgmt_release - char node "release" entry point
2880 static int megasas_mgmt_release(struct inode
*inode
, struct file
*filep
)
2882 filep
->private_data
= NULL
;
2883 fasync_helper(-1, filep
, 0, &megasas_async_queue
);
2889 * megasas_mgmt_fasync - Async notifier registration from applications
2891 * This function adds the calling process to a driver global queue. When an
2892 * event occurs, SIGIO will be sent to all processes in this queue.
2894 static int megasas_mgmt_fasync(int fd
, struct file
*filep
, int mode
)
2898 mutex_lock(&megasas_async_queue_mutex
);
2900 rc
= fasync_helper(fd
, filep
, mode
, &megasas_async_queue
);
2902 mutex_unlock(&megasas_async_queue_mutex
);
2905 /* For sanity check when we get ioctl */
2906 filep
->private_data
= filep
;
2910 printk(KERN_DEBUG
"megasas: fasync_helper failed [%d]\n", rc
);
2916 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2917 * @instance: Adapter soft state
2918 * @argp: User's ioctl packet
2921 megasas_mgmt_fw_ioctl(struct megasas_instance
*instance
,
2922 struct megasas_iocpacket __user
* user_ioc
,
2923 struct megasas_iocpacket
*ioc
)
2925 struct megasas_sge32
*kern_sge32
;
2926 struct megasas_cmd
*cmd
;
2927 void *kbuff_arr
[MAX_IOCTL_SGE
];
2928 dma_addr_t buf_handle
= 0;
2931 dma_addr_t sense_handle
;
2934 memset(kbuff_arr
, 0, sizeof(kbuff_arr
));
2936 if (ioc
->sge_count
> MAX_IOCTL_SGE
) {
2937 printk(KERN_DEBUG
"megasas: SGE count [%d] > max limit [%d]\n",
2938 ioc
->sge_count
, MAX_IOCTL_SGE
);
2942 cmd
= megasas_get_cmd(instance
);
2944 printk(KERN_DEBUG
"megasas: Failed to get a cmd packet\n");
2949 * User's IOCTL packet has 2 frames (maximum). Copy those two
2950 * frames into our cmd's frames. cmd->frame's context will get
2951 * overwritten when we copy from user's frames. So set that value
2954 memcpy(cmd
->frame
, ioc
->frame
.raw
, 2 * MEGAMFI_FRAME_SIZE
);
2955 cmd
->frame
->hdr
.context
= cmd
->index
;
2958 * The management interface between applications and the fw uses
2959 * MFI frames. E.g, RAID configuration changes, LD property changes
2960 * etc are accomplishes through different kinds of MFI frames. The
2961 * driver needs to care only about substituting user buffers with
2962 * kernel buffers in SGLs. The location of SGL is embedded in the
2963 * struct iocpacket itself.
2965 kern_sge32
= (struct megasas_sge32
*)
2966 ((unsigned long)cmd
->frame
+ ioc
->sgl_off
);
2969 * For each user buffer, create a mirror buffer and copy in
2971 for (i
= 0; i
< ioc
->sge_count
; i
++) {
2972 kbuff_arr
[i
] = dma_alloc_coherent(&instance
->pdev
->dev
,
2973 ioc
->sgl
[i
].iov_len
,
2974 &buf_handle
, GFP_KERNEL
);
2975 if (!kbuff_arr
[i
]) {
2976 printk(KERN_DEBUG
"megasas: Failed to alloc "
2977 "kernel SGL buffer for IOCTL \n");
2983 * We don't change the dma_coherent_mask, so
2984 * pci_alloc_consistent only returns 32bit addresses
2986 kern_sge32
[i
].phys_addr
= (u32
) buf_handle
;
2987 kern_sge32
[i
].length
= ioc
->sgl
[i
].iov_len
;
2990 * We created a kernel buffer corresponding to the
2991 * user buffer. Now copy in from the user buffer
2993 if (copy_from_user(kbuff_arr
[i
], ioc
->sgl
[i
].iov_base
,
2994 (u32
) (ioc
->sgl
[i
].iov_len
))) {
3000 if (ioc
->sense_len
) {
3001 sense
= dma_alloc_coherent(&instance
->pdev
->dev
, ioc
->sense_len
,
3002 &sense_handle
, GFP_KERNEL
);
3009 (u32
*) ((unsigned long)cmd
->frame
+ ioc
->sense_off
);
3010 *sense_ptr
= sense_handle
;
3014 * Set the sync_cmd flag so that the ISR knows not to complete this
3015 * cmd to the SCSI mid-layer
3018 megasas_issue_blocked_cmd(instance
, cmd
);
3022 * copy out the kernel buffers to user buffers
3024 for (i
= 0; i
< ioc
->sge_count
; i
++) {
3025 if (copy_to_user(ioc
->sgl
[i
].iov_base
, kbuff_arr
[i
],
3026 ioc
->sgl
[i
].iov_len
)) {
3033 * copy out the sense
3035 if (ioc
->sense_len
) {
3037 * sense_ptr points to the location that has the user
3038 * sense buffer address
3040 sense_ptr
= (u32
*) ((unsigned long)ioc
->frame
.raw
+
3043 if (copy_to_user((void __user
*)((unsigned long)(*sense_ptr
)),
3044 sense
, ioc
->sense_len
)) {
3045 printk(KERN_ERR
"megasas: Failed to copy out to user "
3053 * copy the status codes returned by the fw
3055 if (copy_to_user(&user_ioc
->frame
.hdr
.cmd_status
,
3056 &cmd
->frame
->hdr
.cmd_status
, sizeof(u8
))) {
3057 printk(KERN_DEBUG
"megasas: Error copying out cmd_status\n");
3063 dma_free_coherent(&instance
->pdev
->dev
, ioc
->sense_len
,
3064 sense
, sense_handle
);
3067 for (i
= 0; i
< ioc
->sge_count
&& kbuff_arr
[i
]; i
++) {
3068 dma_free_coherent(&instance
->pdev
->dev
,
3069 kern_sge32
[i
].length
,
3070 kbuff_arr
[i
], kern_sge32
[i
].phys_addr
);
3073 megasas_return_cmd(instance
, cmd
);
3077 static struct megasas_instance
*megasas_lookup_instance(u16 host_no
)
3081 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
3083 if ((megasas_mgmt_info
.instance
[i
]) &&
3084 (megasas_mgmt_info
.instance
[i
]->host
->host_no
== host_no
))
3085 return megasas_mgmt_info
.instance
[i
];
3091 static int megasas_mgmt_ioctl_fw(struct file
*file
, unsigned long arg
)
3093 struct megasas_iocpacket __user
*user_ioc
=
3094 (struct megasas_iocpacket __user
*)arg
;
3095 struct megasas_iocpacket
*ioc
;
3096 struct megasas_instance
*instance
;
3099 ioc
= kmalloc(sizeof(*ioc
), GFP_KERNEL
);
3103 if (copy_from_user(ioc
, user_ioc
, sizeof(*ioc
))) {
3108 instance
= megasas_lookup_instance(ioc
->host_no
);
3115 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
3117 if (down_interruptible(&instance
->ioctl_sem
)) {
3118 error
= -ERESTARTSYS
;
3121 error
= megasas_mgmt_fw_ioctl(instance
, user_ioc
, ioc
);
3122 up(&instance
->ioctl_sem
);
3129 static int megasas_mgmt_ioctl_aen(struct file
*file
, unsigned long arg
)
3131 struct megasas_instance
*instance
;
3132 struct megasas_aen aen
;
3135 if (file
->private_data
!= file
) {
3136 printk(KERN_DEBUG
"megasas: fasync_helper was not "
3141 if (copy_from_user(&aen
, (void __user
*)arg
, sizeof(aen
)))
3144 instance
= megasas_lookup_instance(aen
.host_no
);
3149 mutex_lock(&instance
->aen_mutex
);
3150 error
= megasas_register_aen(instance
, aen
.seq_num
,
3151 aen
.class_locale_word
);
3152 mutex_unlock(&instance
->aen_mutex
);
3157 * megasas_mgmt_ioctl - char node ioctl entry point
3160 megasas_mgmt_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
3163 case MEGASAS_IOC_FIRMWARE
:
3164 return megasas_mgmt_ioctl_fw(file
, arg
);
3166 case MEGASAS_IOC_GET_AEN
:
3167 return megasas_mgmt_ioctl_aen(file
, arg
);
3173 #ifdef CONFIG_COMPAT
3174 static int megasas_mgmt_compat_ioctl_fw(struct file
*file
, unsigned long arg
)
3176 struct compat_megasas_iocpacket __user
*cioc
=
3177 (struct compat_megasas_iocpacket __user
*)arg
;
3178 struct megasas_iocpacket __user
*ioc
=
3179 compat_alloc_user_space(sizeof(struct megasas_iocpacket
));
3183 if (clear_user(ioc
, sizeof(*ioc
)))
3186 if (copy_in_user(&ioc
->host_no
, &cioc
->host_no
, sizeof(u16
)) ||
3187 copy_in_user(&ioc
->sgl_off
, &cioc
->sgl_off
, sizeof(u32
)) ||
3188 copy_in_user(&ioc
->sense_off
, &cioc
->sense_off
, sizeof(u32
)) ||
3189 copy_in_user(&ioc
->sense_len
, &cioc
->sense_len
, sizeof(u32
)) ||
3190 copy_in_user(ioc
->frame
.raw
, cioc
->frame
.raw
, 128) ||
3191 copy_in_user(&ioc
->sge_count
, &cioc
->sge_count
, sizeof(u32
)))
3194 for (i
= 0; i
< MAX_IOCTL_SGE
; i
++) {
3197 if (get_user(ptr
, &cioc
->sgl
[i
].iov_base
) ||
3198 put_user(compat_ptr(ptr
), &ioc
->sgl
[i
].iov_base
) ||
3199 copy_in_user(&ioc
->sgl
[i
].iov_len
,
3200 &cioc
->sgl
[i
].iov_len
, sizeof(compat_size_t
)))
3204 error
= megasas_mgmt_ioctl_fw(file
, (unsigned long)ioc
);
3206 if (copy_in_user(&cioc
->frame
.hdr
.cmd_status
,
3207 &ioc
->frame
.hdr
.cmd_status
, sizeof(u8
))) {
3208 printk(KERN_DEBUG
"megasas: error copy_in_user cmd_status\n");
3215 megasas_mgmt_compat_ioctl(struct file
*file
, unsigned int cmd
,
3219 case MEGASAS_IOC_FIRMWARE32
:
3220 return megasas_mgmt_compat_ioctl_fw(file
, arg
);
3221 case MEGASAS_IOC_GET_AEN
:
3222 return megasas_mgmt_ioctl_aen(file
, arg
);
3230 * File operations structure for management interface
3232 static const struct file_operations megasas_mgmt_fops
= {
3233 .owner
= THIS_MODULE
,
3234 .open
= megasas_mgmt_open
,
3235 .release
= megasas_mgmt_release
,
3236 .fasync
= megasas_mgmt_fasync
,
3237 .unlocked_ioctl
= megasas_mgmt_ioctl
,
3238 #ifdef CONFIG_COMPAT
3239 .compat_ioctl
= megasas_mgmt_compat_ioctl
,
3244 * PCI hotplug support registration structure
3246 static struct pci_driver megasas_pci_driver
= {
3248 .name
= "megaraid_sas",
3249 .id_table
= megasas_pci_table
,
3250 .probe
= megasas_probe_one
,
3251 .remove
= __devexit_p(megasas_detach_one
),
3252 .suspend
= megasas_suspend
,
3253 .resume
= megasas_resume
,
3254 .shutdown
= megasas_shutdown
,
3258 * Sysfs driver attributes
3260 static ssize_t
megasas_sysfs_show_version(struct device_driver
*dd
, char *buf
)
3262 return snprintf(buf
, strlen(MEGASAS_VERSION
) + 2, "%s\n",
3266 static DRIVER_ATTR(version
, S_IRUGO
, megasas_sysfs_show_version
, NULL
);
3269 megasas_sysfs_show_release_date(struct device_driver
*dd
, char *buf
)
3271 return snprintf(buf
, strlen(MEGASAS_RELDATE
) + 2, "%s\n",
3275 static DRIVER_ATTR(release_date
, S_IRUGO
, megasas_sysfs_show_release_date
,
3279 megasas_sysfs_show_dbg_lvl(struct device_driver
*dd
, char *buf
)
3281 return sprintf(buf
, "%u\n", megasas_dbg_lvl
);
3285 megasas_sysfs_set_dbg_lvl(struct device_driver
*dd
, const char *buf
, size_t count
)
3288 if(sscanf(buf
,"%u",&megasas_dbg_lvl
)<1){
3289 printk(KERN_ERR
"megasas: could not set dbg_lvl\n");
3295 static DRIVER_ATTR(dbg_lvl
, S_IRUGO
|S_IWUGO
, megasas_sysfs_show_dbg_lvl
,
3296 megasas_sysfs_set_dbg_lvl
);
3299 megasas_sysfs_show_poll_mode_io(struct device_driver
*dd
, char *buf
)
3301 return sprintf(buf
, "%u\n", poll_mode_io
);
3305 megasas_sysfs_set_poll_mode_io(struct device_driver
*dd
,
3306 const char *buf
, size_t count
)
3309 int tmp
= poll_mode_io
;
3311 struct megasas_instance
*instance
;
3313 if (sscanf(buf
, "%u", &poll_mode_io
) < 1) {
3314 printk(KERN_ERR
"megasas: could not set poll_mode_io\n");
3319 * Check if poll_mode_io is already set or is same as previous value
3321 if ((tmp
&& poll_mode_io
) || (tmp
== poll_mode_io
))
3326 * Start timers for all adapters
3328 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
3329 instance
= megasas_mgmt_info
.instance
[i
];
3331 megasas_start_timer(instance
,
3332 &instance
->io_completion_timer
,
3333 megasas_io_completion_timer
,
3334 MEGASAS_COMPLETION_TIMER_INTERVAL
);
3339 * Delete timers for all adapters
3341 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
3342 instance
= megasas_mgmt_info
.instance
[i
];
3344 del_timer_sync(&instance
->io_completion_timer
);
3352 static DRIVER_ATTR(poll_mode_io
, S_IRUGO
|S_IWUGO
,
3353 megasas_sysfs_show_poll_mode_io
,
3354 megasas_sysfs_set_poll_mode_io
);
3357 * megasas_init - Driver load entry point
3359 static int __init
megasas_init(void)
3364 * Announce driver version and other information
3366 printk(KERN_INFO
"megasas: %s %s\n", MEGASAS_VERSION
,
3367 MEGASAS_EXT_VERSION
);
3369 memset(&megasas_mgmt_info
, 0, sizeof(megasas_mgmt_info
));
3372 * Register character device node
3374 rval
= register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops
);
3377 printk(KERN_DEBUG
"megasas: failed to open device node\n");
3381 megasas_mgmt_majorno
= rval
;
3384 * Register ourselves as PCI hotplug module
3386 rval
= pci_register_driver(&megasas_pci_driver
);
3389 printk(KERN_DEBUG
"megasas: PCI hotplug regisration failed \n");
3393 rval
= driver_create_file(&megasas_pci_driver
.driver
,
3394 &driver_attr_version
);
3396 goto err_dcf_attr_ver
;
3397 rval
= driver_create_file(&megasas_pci_driver
.driver
,
3398 &driver_attr_release_date
);
3400 goto err_dcf_rel_date
;
3401 rval
= driver_create_file(&megasas_pci_driver
.driver
,
3402 &driver_attr_dbg_lvl
);
3404 goto err_dcf_dbg_lvl
;
3405 rval
= driver_create_file(&megasas_pci_driver
.driver
,
3406 &driver_attr_poll_mode_io
);
3408 goto err_dcf_poll_mode_io
;
3412 err_dcf_poll_mode_io
:
3413 driver_remove_file(&megasas_pci_driver
.driver
,
3414 &driver_attr_dbg_lvl
);
3416 driver_remove_file(&megasas_pci_driver
.driver
,
3417 &driver_attr_release_date
);
3419 driver_remove_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
3421 pci_unregister_driver(&megasas_pci_driver
);
3423 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
3428 * megasas_exit - Driver unload entry point
3430 static void __exit
megasas_exit(void)
3432 driver_remove_file(&megasas_pci_driver
.driver
,
3433 &driver_attr_poll_mode_io
);
3434 driver_remove_file(&megasas_pci_driver
.driver
,
3435 &driver_attr_dbg_lvl
);
3436 driver_remove_file(&megasas_pci_driver
.driver
,
3437 &driver_attr_release_date
);
3438 driver_remove_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
3440 pci_unregister_driver(&megasas_pci_driver
);
3441 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
3444 module_init(megasas_init
);
3445 module_exit(megasas_exit
);