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 : v00.00.03.05
16 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
17 * Sumant Patro <Sumant.Patro@lsi.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("megaraidlinux@lsi.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
[] = {
56 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_SAS1064R
)},
58 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_SAS1078R
)},
60 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_VERDE_ZCR
)},
61 /* xscale IOP, vega */
62 {PCI_DEVICE(PCI_VENDOR_ID_DELL
, PCI_DEVICE_ID_DELL_PERC5
)},
67 MODULE_DEVICE_TABLE(pci
, megasas_pci_table
);
69 static int megasas_mgmt_majorno
;
70 static struct megasas_mgmt_info megasas_mgmt_info
;
71 static struct fasync_struct
*megasas_async_queue
;
72 static DEFINE_MUTEX(megasas_async_queue_mutex
);
74 static u32 megasas_dbg_lvl
;
77 * megasas_get_cmd - Get a command from the free pool
78 * @instance: Adapter soft state
80 * Returns a free command from the pool
82 static struct megasas_cmd
*megasas_get_cmd(struct megasas_instance
86 struct megasas_cmd
*cmd
= NULL
;
88 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
90 if (!list_empty(&instance
->cmd_pool
)) {
91 cmd
= list_entry((&instance
->cmd_pool
)->next
,
92 struct megasas_cmd
, list
);
93 list_del_init(&cmd
->list
);
95 printk(KERN_ERR
"megasas: Command pool empty!\n");
98 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
103 * megasas_return_cmd - Return a cmd to free command pool
104 * @instance: Adapter soft state
105 * @cmd: Command packet to be returned to free command pool
108 megasas_return_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
112 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
115 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
117 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
122 * The following functions are defined for xscale
123 * (deviceid : 1064R, PERC5) controllers
127 * megasas_enable_intr_xscale - Enables interrupts
128 * @regs: MFI register set
131 megasas_enable_intr_xscale(struct megasas_register_set __iomem
* regs
)
133 writel(1, &(regs
)->outbound_intr_mask
);
135 /* Dummy readl to force pci flush */
136 readl(®s
->outbound_intr_mask
);
140 * megasas_disable_intr_xscale -Disables interrupt
141 * @regs: MFI register set
144 megasas_disable_intr_xscale(struct megasas_register_set __iomem
* regs
)
147 writel(mask
, ®s
->outbound_intr_mask
);
148 /* Dummy readl to force pci flush */
149 readl(®s
->outbound_intr_mask
);
153 * megasas_read_fw_status_reg_xscale - returns the current FW status value
154 * @regs: MFI register set
157 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem
* regs
)
159 return readl(&(regs
)->outbound_msg_0
);
162 * megasas_clear_interrupt_xscale - Check & clear interrupt
163 * @regs: MFI register set
166 megasas_clear_intr_xscale(struct megasas_register_set __iomem
* regs
)
170 * Check if it is our interrupt
172 status
= readl(®s
->outbound_intr_status
);
174 if (!(status
& MFI_OB_INTR_STATUS_MASK
)) {
179 * Clear the interrupt by writing back the same value
181 writel(status
, ®s
->outbound_intr_status
);
187 * megasas_fire_cmd_xscale - Sends command to the FW
188 * @frame_phys_addr : Physical address of cmd
189 * @frame_count : Number of frames for the command
190 * @regs : MFI register set
193 megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr
,u32 frame_count
, struct megasas_register_set __iomem
*regs
)
195 writel((frame_phys_addr
>> 3)|(frame_count
),
196 &(regs
)->inbound_queue_port
);
199 static struct megasas_instance_template megasas_instance_template_xscale
= {
201 .fire_cmd
= megasas_fire_cmd_xscale
,
202 .enable_intr
= megasas_enable_intr_xscale
,
203 .disable_intr
= megasas_disable_intr_xscale
,
204 .clear_intr
= megasas_clear_intr_xscale
,
205 .read_fw_status_reg
= megasas_read_fw_status_reg_xscale
,
209 * This is the end of set of functions & definitions specific
210 * to xscale (deviceid : 1064R, PERC5) controllers
214 * The following functions are defined for ppc (deviceid : 0x60)
219 * megasas_enable_intr_ppc - Enables interrupts
220 * @regs: MFI register set
223 megasas_enable_intr_ppc(struct megasas_register_set __iomem
* regs
)
225 writel(0xFFFFFFFF, &(regs
)->outbound_doorbell_clear
);
227 writel(~0x80000004, &(regs
)->outbound_intr_mask
);
229 /* Dummy readl to force pci flush */
230 readl(®s
->outbound_intr_mask
);
234 * megasas_disable_intr_ppc - Disable interrupt
235 * @regs: MFI register set
238 megasas_disable_intr_ppc(struct megasas_register_set __iomem
* regs
)
240 u32 mask
= 0xFFFFFFFF;
241 writel(mask
, ®s
->outbound_intr_mask
);
242 /* Dummy readl to force pci flush */
243 readl(®s
->outbound_intr_mask
);
247 * megasas_read_fw_status_reg_ppc - returns the current FW status value
248 * @regs: MFI register set
251 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem
* regs
)
253 return readl(&(regs
)->outbound_scratch_pad
);
257 * megasas_clear_interrupt_ppc - Check & clear interrupt
258 * @regs: MFI register set
261 megasas_clear_intr_ppc(struct megasas_register_set __iomem
* regs
)
265 * Check if it is our interrupt
267 status
= readl(®s
->outbound_intr_status
);
269 if (!(status
& MFI_REPLY_1078_MESSAGE_INTERRUPT
)) {
274 * Clear the interrupt by writing back the same value
276 writel(status
, ®s
->outbound_doorbell_clear
);
281 * megasas_fire_cmd_ppc - Sends command to the FW
282 * @frame_phys_addr : Physical address of cmd
283 * @frame_count : Number of frames for the command
284 * @regs : MFI register set
287 megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr
, u32 frame_count
, struct megasas_register_set __iomem
*regs
)
289 writel((frame_phys_addr
| (frame_count
<<1))|1,
290 &(regs
)->inbound_queue_port
);
293 static struct megasas_instance_template megasas_instance_template_ppc
= {
295 .fire_cmd
= megasas_fire_cmd_ppc
,
296 .enable_intr
= megasas_enable_intr_ppc
,
297 .disable_intr
= megasas_disable_intr_ppc
,
298 .clear_intr
= megasas_clear_intr_ppc
,
299 .read_fw_status_reg
= megasas_read_fw_status_reg_ppc
,
303 * This is the end of set of functions & definitions
304 * specific to ppc (deviceid : 0x60) controllers
308 * megasas_issue_polled - Issues a polling command
309 * @instance: Adapter soft state
310 * @cmd: Command packet to be issued
312 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
315 megasas_issue_polled(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
318 u32 msecs
= MFI_POLL_TIMEOUT_SECS
* 1000;
320 struct megasas_header
*frame_hdr
= &cmd
->frame
->hdr
;
322 frame_hdr
->cmd_status
= 0xFF;
323 frame_hdr
->flags
|= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE
;
326 * Issue the frame using inbound queue port
328 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
331 * Wait for cmd_status to change
333 for (i
= 0; (i
< msecs
) && (frame_hdr
->cmd_status
== 0xff); i
++) {
338 if (frame_hdr
->cmd_status
== 0xff)
345 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
346 * @instance: Adapter soft state
347 * @cmd: Command to be issued
349 * This function waits on an event for the command to be returned from ISR.
350 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
351 * Used to issue ioctl commands.
354 megasas_issue_blocked_cmd(struct megasas_instance
*instance
,
355 struct megasas_cmd
*cmd
)
357 cmd
->cmd_status
= ENODATA
;
359 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
361 wait_event_timeout(instance
->int_cmd_wait_q
, (cmd
->cmd_status
!= ENODATA
),
362 MEGASAS_INTERNAL_CMD_WAIT_TIME
*HZ
);
368 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
369 * @instance: Adapter soft state
370 * @cmd_to_abort: Previously issued cmd to be aborted
372 * MFI firmware can abort previously issued AEN comamnd (automatic event
373 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
374 * cmd and waits for return status.
375 * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
378 megasas_issue_blocked_abort_cmd(struct megasas_instance
*instance
,
379 struct megasas_cmd
*cmd_to_abort
)
381 struct megasas_cmd
*cmd
;
382 struct megasas_abort_frame
*abort_fr
;
384 cmd
= megasas_get_cmd(instance
);
389 abort_fr
= &cmd
->frame
->abort
;
392 * Prepare and issue the abort frame
394 abort_fr
->cmd
= MFI_CMD_ABORT
;
395 abort_fr
->cmd_status
= 0xFF;
397 abort_fr
->abort_context
= cmd_to_abort
->index
;
398 abort_fr
->abort_mfi_phys_addr_lo
= cmd_to_abort
->frame_phys_addr
;
399 abort_fr
->abort_mfi_phys_addr_hi
= 0;
402 cmd
->cmd_status
= 0xFF;
404 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
407 * Wait for this cmd to complete
409 wait_event_timeout(instance
->abort_cmd_wait_q
, (cmd
->cmd_status
!= 0xFF),
410 MEGASAS_INTERNAL_CMD_WAIT_TIME
*HZ
);
412 megasas_return_cmd(instance
, cmd
);
417 * megasas_make_sgl32 - Prepares 32-bit SGL
418 * @instance: Adapter soft state
419 * @scp: SCSI command from the mid-layer
420 * @mfi_sgl: SGL to be filled in
422 * If successful, this function returns the number of SG elements. Otherwise,
426 megasas_make_sgl32(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
427 union megasas_sgl
*mfi_sgl
)
431 struct scatterlist
*os_sgl
;
434 * Return 0 if there is no data transfer
436 if (!scp
->request_buffer
|| !scp
->request_bufflen
)
440 mfi_sgl
->sge32
[0].phys_addr
= pci_map_single(instance
->pdev
,
447 mfi_sgl
->sge32
[0].length
= scp
->request_bufflen
;
452 os_sgl
= (struct scatterlist
*)scp
->request_buffer
;
453 sge_count
= pci_map_sg(instance
->pdev
, os_sgl
, scp
->use_sg
,
454 scp
->sc_data_direction
);
456 for (i
= 0; i
< sge_count
; i
++, os_sgl
++) {
457 mfi_sgl
->sge32
[i
].length
= sg_dma_len(os_sgl
);
458 mfi_sgl
->sge32
[i
].phys_addr
= sg_dma_address(os_sgl
);
465 * megasas_make_sgl64 - Prepares 64-bit SGL
466 * @instance: Adapter soft state
467 * @scp: SCSI command from the mid-layer
468 * @mfi_sgl: SGL to be filled in
470 * If successful, this function returns the number of SG elements. Otherwise,
474 megasas_make_sgl64(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
475 union megasas_sgl
*mfi_sgl
)
479 struct scatterlist
*os_sgl
;
482 * Return 0 if there is no data transfer
484 if (!scp
->request_buffer
|| !scp
->request_bufflen
)
488 mfi_sgl
->sge64
[0].phys_addr
= pci_map_single(instance
->pdev
,
496 mfi_sgl
->sge64
[0].length
= scp
->request_bufflen
;
501 os_sgl
= (struct scatterlist
*)scp
->request_buffer
;
502 sge_count
= pci_map_sg(instance
->pdev
, os_sgl
, scp
->use_sg
,
503 scp
->sc_data_direction
);
505 for (i
= 0; i
< sge_count
; i
++, os_sgl
++) {
506 mfi_sgl
->sge64
[i
].length
= sg_dma_len(os_sgl
);
507 mfi_sgl
->sge64
[i
].phys_addr
= sg_dma_address(os_sgl
);
514 * megasas_get_frame_count - Computes the number of frames
515 * @sge_count : number of sg elements
517 * Returns the number of frames required for numnber of sge's (sge_count)
520 static u32
megasas_get_frame_count(u8 sge_count
)
527 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
528 sizeof(struct megasas_sge32
);
531 * Main frame can contain 2 SGEs for 64-bit SGLs and
532 * 3 SGEs for 32-bit SGLs
535 num_cnt
= sge_count
- 2;
537 num_cnt
= sge_count
- 3;
540 sge_bytes
= sge_sz
* num_cnt
;
542 frame_count
= (sge_bytes
/ MEGAMFI_FRAME_SIZE
) +
543 ((sge_bytes
% MEGAMFI_FRAME_SIZE
) ? 1 : 0) ;
554 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
555 * @instance: Adapter soft state
557 * @cmd: Command to be prepared in
559 * This function prepares CDB commands. These are typcially pass-through
560 * commands to the devices.
563 megasas_build_dcdb(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
564 struct megasas_cmd
*cmd
)
569 struct megasas_pthru_frame
*pthru
;
571 is_logical
= MEGASAS_IS_LOGICAL(scp
);
572 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
573 pthru
= (struct megasas_pthru_frame
*)cmd
->frame
;
575 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
576 flags
= MFI_FRAME_DIR_WRITE
;
577 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
578 flags
= MFI_FRAME_DIR_READ
;
579 else if (scp
->sc_data_direction
== PCI_DMA_NONE
)
580 flags
= MFI_FRAME_DIR_NONE
;
583 * Prepare the DCDB frame
585 pthru
->cmd
= (is_logical
) ? MFI_CMD_LD_SCSI_IO
: MFI_CMD_PD_SCSI_IO
;
586 pthru
->cmd_status
= 0x0;
587 pthru
->scsi_status
= 0x0;
588 pthru
->target_id
= device_id
;
589 pthru
->lun
= scp
->device
->lun
;
590 pthru
->cdb_len
= scp
->cmd_len
;
592 pthru
->flags
= flags
;
593 pthru
->data_xfer_len
= scp
->request_bufflen
;
595 memcpy(pthru
->cdb
, scp
->cmnd
, scp
->cmd_len
);
601 pthru
->flags
|= MFI_FRAME_SGL64
;
602 pthru
->sge_count
= megasas_make_sgl64(instance
, scp
,
605 pthru
->sge_count
= megasas_make_sgl32(instance
, scp
,
609 * Sense info specific
611 pthru
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
612 pthru
->sense_buf_phys_addr_hi
= 0;
613 pthru
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
616 * Compute the total number of frames this command consumes. FW uses
617 * this number to pull sufficient number of frames from host memory.
619 cmd
->frame_count
= megasas_get_frame_count(pthru
->sge_count
);
621 return cmd
->frame_count
;
625 * megasas_build_ldio - Prepares IOs to logical devices
626 * @instance: Adapter soft state
628 * @cmd: Command to to be prepared
630 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
633 megasas_build_ldio(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
634 struct megasas_cmd
*cmd
)
637 u8 sc
= scp
->cmnd
[0];
639 struct megasas_io_frame
*ldio
;
641 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
642 ldio
= (struct megasas_io_frame
*)cmd
->frame
;
644 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
645 flags
= MFI_FRAME_DIR_WRITE
;
646 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
647 flags
= MFI_FRAME_DIR_READ
;
650 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
652 ldio
->cmd
= (sc
& 0x02) ? MFI_CMD_LD_WRITE
: MFI_CMD_LD_READ
;
653 ldio
->cmd_status
= 0x0;
654 ldio
->scsi_status
= 0x0;
655 ldio
->target_id
= device_id
;
657 ldio
->reserved_0
= 0;
660 ldio
->start_lba_hi
= 0;
661 ldio
->access_byte
= (scp
->cmd_len
!= 6) ? scp
->cmnd
[1] : 0;
664 * 6-byte READ(0x08) or WRITE(0x0A) cdb
666 if (scp
->cmd_len
== 6) {
667 ldio
->lba_count
= (u32
) scp
->cmnd
[4];
668 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[1] << 16) |
669 ((u32
) scp
->cmnd
[2] << 8) | (u32
) scp
->cmnd
[3];
671 ldio
->start_lba_lo
&= 0x1FFFFF;
675 * 10-byte READ(0x28) or WRITE(0x2A) cdb
677 else if (scp
->cmd_len
== 10) {
678 ldio
->lba_count
= (u32
) scp
->cmnd
[8] |
679 ((u32
) scp
->cmnd
[7] << 8);
680 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
681 ((u32
) scp
->cmnd
[3] << 16) |
682 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
686 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
688 else if (scp
->cmd_len
== 12) {
689 ldio
->lba_count
= ((u32
) scp
->cmnd
[6] << 24) |
690 ((u32
) scp
->cmnd
[7] << 16) |
691 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
693 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
694 ((u32
) scp
->cmnd
[3] << 16) |
695 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
699 * 16-byte READ(0x88) or WRITE(0x8A) cdb
701 else if (scp
->cmd_len
== 16) {
702 ldio
->lba_count
= ((u32
) scp
->cmnd
[10] << 24) |
703 ((u32
) scp
->cmnd
[11] << 16) |
704 ((u32
) scp
->cmnd
[12] << 8) | (u32
) scp
->cmnd
[13];
706 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[6] << 24) |
707 ((u32
) scp
->cmnd
[7] << 16) |
708 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
710 ldio
->start_lba_hi
= ((u32
) scp
->cmnd
[2] << 24) |
711 ((u32
) scp
->cmnd
[3] << 16) |
712 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
720 ldio
->flags
|= MFI_FRAME_SGL64
;
721 ldio
->sge_count
= megasas_make_sgl64(instance
, scp
, &ldio
->sgl
);
723 ldio
->sge_count
= megasas_make_sgl32(instance
, scp
, &ldio
->sgl
);
726 * Sense info specific
728 ldio
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
729 ldio
->sense_buf_phys_addr_hi
= 0;
730 ldio
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
733 * Compute the total number of frames this command consumes. FW uses
734 * this number to pull sufficient number of frames from host memory.
736 cmd
->frame_count
= megasas_get_frame_count(ldio
->sge_count
);
738 return cmd
->frame_count
;
742 * megasas_is_ldio - Checks if the cmd is for logical drive
743 * @scmd: SCSI command
745 * Called by megasas_queue_command to find out if the command to be queued
746 * is a logical drive command
748 static inline int megasas_is_ldio(struct scsi_cmnd
*cmd
)
750 if (!MEGASAS_IS_LOGICAL(cmd
))
752 switch (cmd
->cmnd
[0]) {
768 * megasas_dump_pending_frames - Dumps the frame address of all pending cmds
770 * @instance: Adapter soft state
773 megasas_dump_pending_frames(struct megasas_instance
*instance
)
775 struct megasas_cmd
*cmd
;
777 union megasas_sgl
*mfi_sgl
;
778 struct megasas_io_frame
*ldio
;
779 struct megasas_pthru_frame
*pthru
;
781 u32 max_cmd
= instance
->max_fw_cmds
;
783 printk(KERN_ERR
"\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance
->host
->host_no
);
784 printk(KERN_ERR
"megasas[%d]: Total OS Pending cmds : %d\n",instance
->host
->host_no
,atomic_read(&instance
->fw_outstanding
));
786 printk(KERN_ERR
"\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance
->host
->host_no
);
788 printk(KERN_ERR
"\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance
->host
->host_no
);
790 printk(KERN_ERR
"megasas[%d]: Pending OS cmds in FW : \n",instance
->host
->host_no
);
791 for (i
= 0; i
< max_cmd
; i
++) {
792 cmd
= instance
->cmd_list
[i
];
795 printk(KERN_ERR
"megasas[%d]: Frame addr :0x%08lx : ",instance
->host
->host_no
,(unsigned long)cmd
->frame_phys_addr
);
796 if (megasas_is_ldio(cmd
->scmd
)){
797 ldio
= (struct megasas_io_frame
*)cmd
->frame
;
798 mfi_sgl
= &ldio
->sgl
;
799 sgcount
= ldio
->sge_count
;
800 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
);
803 pthru
= (struct megasas_pthru_frame
*) cmd
->frame
;
804 mfi_sgl
= &pthru
->sgl
;
805 sgcount
= pthru
->sge_count
;
806 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
);
808 if(megasas_dbg_lvl
& MEGASAS_DBG_LVL
){
809 for (n
= 0; n
< sgcount
; n
++){
811 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
) ;
813 printk(KERN_ERR
"megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl
->sge32
[n
].length
, mfi_sgl
->sge32
[n
].phys_addr
) ;
816 printk(KERN_ERR
"\n");
818 printk(KERN_ERR
"\nmegasas[%d]: Pending Internal cmds in FW : \n",instance
->host
->host_no
);
819 for (i
= 0; i
< max_cmd
; i
++) {
821 cmd
= instance
->cmd_list
[i
];
823 if(cmd
->sync_cmd
== 1){
824 printk(KERN_ERR
"0x%08lx : ", (unsigned long)cmd
->frame_phys_addr
);
827 printk(KERN_ERR
"megasas[%d]: Dumping Done.\n\n",instance
->host
->host_no
);
831 * megasas_queue_command - Queue entry point
832 * @scmd: SCSI command to be queued
833 * @done: Callback entry point
836 megasas_queue_command(struct scsi_cmnd
*scmd
, void (*done
) (struct scsi_cmnd
*))
839 struct megasas_cmd
*cmd
;
840 struct megasas_instance
*instance
;
842 instance
= (struct megasas_instance
*)
843 scmd
->device
->host
->hostdata
;
844 scmd
->scsi_done
= done
;
847 if (MEGASAS_IS_LOGICAL(scmd
) &&
848 (scmd
->device
->id
>= MEGASAS_MAX_LD
|| scmd
->device
->lun
)) {
849 scmd
->result
= DID_BAD_TARGET
<< 16;
853 cmd
= megasas_get_cmd(instance
);
855 return SCSI_MLQUEUE_HOST_BUSY
;
858 * Logical drive command
860 if (megasas_is_ldio(scmd
))
861 frame_count
= megasas_build_ldio(instance
, scmd
, cmd
);
863 frame_count
= megasas_build_dcdb(instance
, scmd
, cmd
);
871 * Issue the command to the FW
873 atomic_inc(&instance
->fw_outstanding
);
875 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,cmd
->frame_count
-1,instance
->reg_set
);
880 megasas_return_cmd(instance
, cmd
);
886 static int megasas_slave_configure(struct scsi_device
*sdev
)
889 * Don't export physical disk devices to the disk driver.
891 * FIXME: Currently we don't export them to the midlayer at all.
892 * That will be fixed once LSI engineers have audited the
893 * firmware for possible issues.
895 if (sdev
->channel
< MEGASAS_MAX_PD_CHANNELS
&& sdev
->type
== TYPE_DISK
)
899 * The RAID firmware may require extended timeouts.
901 if (sdev
->channel
>= MEGASAS_MAX_PD_CHANNELS
)
902 sdev
->timeout
= 90 * HZ
;
907 * megasas_wait_for_outstanding - Wait for all outstanding cmds
908 * @instance: Adapter soft state
910 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
911 * complete all its outstanding commands. Returns error if one or more IOs
912 * are pending after this time period. It also marks the controller dead.
914 static int megasas_wait_for_outstanding(struct megasas_instance
*instance
)
917 u32 wait_time
= MEGASAS_RESET_WAIT_TIME
;
919 for (i
= 0; i
< wait_time
; i
++) {
921 int outstanding
= atomic_read(&instance
->fw_outstanding
);
926 if (!(i
% MEGASAS_RESET_NOTICE_INTERVAL
)) {
927 printk(KERN_NOTICE
"megasas: [%2d]waiting for %d "
928 "commands to complete\n",i
,outstanding
);
934 if (atomic_read(&instance
->fw_outstanding
)) {
936 * Send signal to FW to stop processing any pending cmds.
937 * The controller will be taken offline by the OS now.
940 &instance
->reg_set
->inbound_doorbell
);
941 megasas_dump_pending_frames(instance
);
942 instance
->hw_crit_error
= 1;
950 * megasas_generic_reset - Generic reset routine
951 * @scmd: Mid-layer SCSI command
953 * This routine implements a generic reset handler for device, bus and host
954 * reset requests. Device, bus and host specific reset handlers can use this
955 * function after they do their specific tasks.
957 static int megasas_generic_reset(struct scsi_cmnd
*scmd
)
960 struct megasas_instance
*instance
;
962 instance
= (struct megasas_instance
*)scmd
->device
->host
->hostdata
;
964 scmd_printk(KERN_NOTICE
, scmd
, "megasas: RESET -%ld cmd=%x\n",
965 scmd
->serial_number
, scmd
->cmnd
[0]);
967 if (instance
->hw_crit_error
) {
968 printk(KERN_ERR
"megasas: cannot recover from previous reset "
973 ret_val
= megasas_wait_for_outstanding(instance
);
974 if (ret_val
== SUCCESS
)
975 printk(KERN_NOTICE
"megasas: reset successful \n");
977 printk(KERN_ERR
"megasas: failed to do reset\n");
983 * megasas_reset_device - Device reset handler entry point
985 static int megasas_reset_device(struct scsi_cmnd
*scmd
)
990 * First wait for all commands to complete
992 ret
= megasas_generic_reset(scmd
);
998 * megasas_reset_bus_host - Bus & host reset handler entry point
1000 static int megasas_reset_bus_host(struct scsi_cmnd
*scmd
)
1005 * First wait for all commands to complete
1007 ret
= megasas_generic_reset(scmd
);
1013 * megasas_service_aen - Processes an event notification
1014 * @instance: Adapter soft state
1015 * @cmd: AEN command completed by the ISR
1017 * For AEN, driver sends a command down to FW that is held by the FW till an
1018 * event occurs. When an event of interest occurs, FW completes the command
1019 * that it was previously holding.
1021 * This routines sends SIGIO signal to processes that have registered with the
1025 megasas_service_aen(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
1028 * Don't signal app if it is just an aborted previously registered aen
1030 if (!cmd
->abort_aen
)
1031 kill_fasync(&megasas_async_queue
, SIGIO
, POLL_IN
);
1035 instance
->aen_cmd
= NULL
;
1036 megasas_return_cmd(instance
, cmd
);
1040 * Scsi host template for megaraid_sas driver
1042 static struct scsi_host_template megasas_template
= {
1044 .module
= THIS_MODULE
,
1045 .name
= "LSI Logic SAS based MegaRAID driver",
1046 .proc_name
= "megaraid_sas",
1047 .slave_configure
= megasas_slave_configure
,
1048 .queuecommand
= megasas_queue_command
,
1049 .eh_device_reset_handler
= megasas_reset_device
,
1050 .eh_bus_reset_handler
= megasas_reset_bus_host
,
1051 .eh_host_reset_handler
= megasas_reset_bus_host
,
1052 .use_clustering
= ENABLE_CLUSTERING
,
1056 * megasas_complete_int_cmd - Completes an internal command
1057 * @instance: Adapter soft state
1058 * @cmd: Command to be completed
1060 * The megasas_issue_blocked_cmd() function waits for a command to complete
1061 * after it issues a command. This function wakes up that waiting routine by
1062 * calling wake_up() on the wait queue.
1065 megasas_complete_int_cmd(struct megasas_instance
*instance
,
1066 struct megasas_cmd
*cmd
)
1068 cmd
->cmd_status
= cmd
->frame
->io
.cmd_status
;
1070 if (cmd
->cmd_status
== ENODATA
) {
1071 cmd
->cmd_status
= 0;
1073 wake_up(&instance
->int_cmd_wait_q
);
1077 * megasas_complete_abort - Completes aborting a command
1078 * @instance: Adapter soft state
1079 * @cmd: Cmd that was issued to abort another cmd
1081 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
1082 * after it issues an abort on a previously issued command. This function
1083 * wakes up all functions waiting on the same wait queue.
1086 megasas_complete_abort(struct megasas_instance
*instance
,
1087 struct megasas_cmd
*cmd
)
1089 if (cmd
->sync_cmd
) {
1091 cmd
->cmd_status
= 0;
1092 wake_up(&instance
->abort_cmd_wait_q
);
1099 * megasas_unmap_sgbuf - Unmap SG buffers
1100 * @instance: Adapter soft state
1101 * @cmd: Completed command
1104 megasas_unmap_sgbuf(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
1109 if (cmd
->scmd
->use_sg
) {
1110 pci_unmap_sg(instance
->pdev
, cmd
->scmd
->request_buffer
,
1111 cmd
->scmd
->use_sg
, cmd
->scmd
->sc_data_direction
);
1115 if (!cmd
->scmd
->request_bufflen
)
1118 opcode
= cmd
->frame
->hdr
.cmd
;
1120 if ((opcode
== MFI_CMD_LD_READ
) || (opcode
== MFI_CMD_LD_WRITE
)) {
1122 buf_h
= cmd
->frame
->io
.sgl
.sge64
[0].phys_addr
;
1124 buf_h
= cmd
->frame
->io
.sgl
.sge32
[0].phys_addr
;
1127 buf_h
= cmd
->frame
->pthru
.sgl
.sge64
[0].phys_addr
;
1129 buf_h
= cmd
->frame
->pthru
.sgl
.sge32
[0].phys_addr
;
1132 pci_unmap_single(instance
->pdev
, buf_h
, cmd
->scmd
->request_bufflen
,
1133 cmd
->scmd
->sc_data_direction
);
1138 * megasas_complete_cmd - Completes a command
1139 * @instance: Adapter soft state
1140 * @cmd: Command to be completed
1141 * @alt_status: If non-zero, use this value as status to
1142 * SCSI mid-layer instead of the value returned
1143 * by the FW. This should be used if caller wants
1144 * an alternate status (as in the case of aborted
1148 megasas_complete_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
,
1152 struct megasas_header
*hdr
= &cmd
->frame
->hdr
;
1155 cmd
->scmd
->SCp
.ptr
= (char *)0;
1160 case MFI_CMD_PD_SCSI_IO
:
1161 case MFI_CMD_LD_SCSI_IO
:
1164 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1165 * issued either through an IO path or an IOCTL path. If it
1166 * was via IOCTL, we will send it to internal completion.
1168 if (cmd
->sync_cmd
) {
1170 megasas_complete_int_cmd(instance
, cmd
);
1174 case MFI_CMD_LD_READ
:
1175 case MFI_CMD_LD_WRITE
:
1178 cmd
->scmd
->result
= alt_status
<< 16;
1184 atomic_dec(&instance
->fw_outstanding
);
1186 megasas_unmap_sgbuf(instance
, cmd
);
1187 cmd
->scmd
->scsi_done(cmd
->scmd
);
1188 megasas_return_cmd(instance
, cmd
);
1193 switch (hdr
->cmd_status
) {
1196 cmd
->scmd
->result
= DID_OK
<< 16;
1199 case MFI_STAT_SCSI_IO_FAILED
:
1200 case MFI_STAT_LD_INIT_IN_PROGRESS
:
1202 (DID_ERROR
<< 16) | hdr
->scsi_status
;
1205 case MFI_STAT_SCSI_DONE_WITH_ERROR
:
1207 cmd
->scmd
->result
= (DID_OK
<< 16) | hdr
->scsi_status
;
1209 if (hdr
->scsi_status
== SAM_STAT_CHECK_CONDITION
) {
1210 memset(cmd
->scmd
->sense_buffer
, 0,
1211 SCSI_SENSE_BUFFERSIZE
);
1212 memcpy(cmd
->scmd
->sense_buffer
, cmd
->sense
,
1215 cmd
->scmd
->result
|= DRIVER_SENSE
<< 24;
1220 case MFI_STAT_LD_OFFLINE
:
1221 case MFI_STAT_DEVICE_NOT_FOUND
:
1222 cmd
->scmd
->result
= DID_BAD_TARGET
<< 16;
1226 printk(KERN_DEBUG
"megasas: MFI FW status %#x\n",
1228 cmd
->scmd
->result
= DID_ERROR
<< 16;
1232 atomic_dec(&instance
->fw_outstanding
);
1234 megasas_unmap_sgbuf(instance
, cmd
);
1235 cmd
->scmd
->scsi_done(cmd
->scmd
);
1236 megasas_return_cmd(instance
, cmd
);
1245 * See if got an event notification
1247 if (cmd
->frame
->dcmd
.opcode
== MR_DCMD_CTRL_EVENT_WAIT
)
1248 megasas_service_aen(instance
, cmd
);
1250 megasas_complete_int_cmd(instance
, cmd
);
1256 * Cmd issued to abort another cmd returned
1258 megasas_complete_abort(instance
, cmd
);
1262 printk("megasas: Unknown command completed! [0x%X]\n",
1269 * megasas_deplete_reply_queue - Processes all completed commands
1270 * @instance: Adapter soft state
1271 * @alt_status: Alternate status to be returned to
1272 * SCSI mid-layer instead of the status
1273 * returned by the FW
1276 megasas_deplete_reply_queue(struct megasas_instance
*instance
, u8 alt_status
)
1279 * Check if it is our interrupt
1280 * Clear the interrupt
1282 if(instance
->instancet
->clear_intr(instance
->reg_set
))
1286 * Schedule the tasklet for cmd completion
1288 tasklet_schedule(&instance
->isr_tasklet
);
1294 * megasas_isr - isr entry point
1296 static irqreturn_t
megasas_isr(int irq
, void *devp
)
1298 return megasas_deplete_reply_queue((struct megasas_instance
*)devp
,
1303 * megasas_transition_to_ready - Move the FW to READY state
1304 * @instance: Adapter soft state
1306 * During the initialization, FW passes can potentially be in any one of
1307 * several possible states. If the FW in operational, waiting-for-handshake
1308 * states, driver must take steps to bring it to ready state. Otherwise, it
1309 * has to wait for the ready state.
1312 megasas_transition_to_ready(struct megasas_instance
* instance
)
1319 fw_state
= instance
->instancet
->read_fw_status_reg(instance
->reg_set
) & MFI_STATE_MASK
;
1321 if (fw_state
!= MFI_STATE_READY
)
1322 printk(KERN_INFO
"megasas: Waiting for FW to come to ready"
1325 while (fw_state
!= MFI_STATE_READY
) {
1329 case MFI_STATE_FAULT
:
1331 printk(KERN_DEBUG
"megasas: FW in FAULT state!!\n");
1334 case MFI_STATE_WAIT_HANDSHAKE
:
1336 * Set the CLR bit in inbound doorbell
1338 writel(MFI_INIT_CLEAR_HANDSHAKE
|MFI_INIT_HOTPLUG
,
1339 &instance
->reg_set
->inbound_doorbell
);
1342 cur_state
= MFI_STATE_WAIT_HANDSHAKE
;
1345 case MFI_STATE_BOOT_MESSAGE_PENDING
:
1346 writel(MFI_INIT_HOTPLUG
,
1347 &instance
->reg_set
->inbound_doorbell
);
1350 cur_state
= MFI_STATE_BOOT_MESSAGE_PENDING
;
1353 case MFI_STATE_OPERATIONAL
:
1355 * Bring it to READY state; assuming max wait 10 secs
1357 instance
->instancet
->disable_intr(instance
->reg_set
);
1358 writel(MFI_RESET_FLAGS
, &instance
->reg_set
->inbound_doorbell
);
1361 cur_state
= MFI_STATE_OPERATIONAL
;
1364 case MFI_STATE_UNDEFINED
:
1366 * This state should not last for more than 2 seconds
1369 cur_state
= MFI_STATE_UNDEFINED
;
1372 case MFI_STATE_BB_INIT
:
1374 cur_state
= MFI_STATE_BB_INIT
;
1377 case MFI_STATE_FW_INIT
:
1379 cur_state
= MFI_STATE_FW_INIT
;
1382 case MFI_STATE_FW_INIT_2
:
1384 cur_state
= MFI_STATE_FW_INIT_2
;
1387 case MFI_STATE_DEVICE_SCAN
:
1389 cur_state
= MFI_STATE_DEVICE_SCAN
;
1392 case MFI_STATE_FLUSH_CACHE
:
1394 cur_state
= MFI_STATE_FLUSH_CACHE
;
1398 printk(KERN_DEBUG
"megasas: Unknown state 0x%x\n",
1404 * The cur_state should not last for more than max_wait secs
1406 for (i
= 0; i
< (max_wait
* 1000); i
++) {
1407 fw_state
= instance
->instancet
->read_fw_status_reg(instance
->reg_set
) &
1410 if (fw_state
== cur_state
) {
1417 * Return error if fw_state hasn't changed after max_wait
1419 if (fw_state
== cur_state
) {
1420 printk(KERN_DEBUG
"FW state [%d] hasn't changed "
1421 "in %d secs\n", fw_state
, max_wait
);
1425 printk(KERN_INFO
"megasas: FW now in Ready state\n");
1431 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1432 * @instance: Adapter soft state
1434 static void megasas_teardown_frame_pool(struct megasas_instance
*instance
)
1437 u32 max_cmd
= instance
->max_fw_cmds
;
1438 struct megasas_cmd
*cmd
;
1440 if (!instance
->frame_dma_pool
)
1444 * Return all frames to pool
1446 for (i
= 0; i
< max_cmd
; i
++) {
1448 cmd
= instance
->cmd_list
[i
];
1451 pci_pool_free(instance
->frame_dma_pool
, cmd
->frame
,
1452 cmd
->frame_phys_addr
);
1455 pci_pool_free(instance
->sense_dma_pool
, cmd
->sense
,
1456 cmd
->sense_phys_addr
);
1460 * Now destroy the pool itself
1462 pci_pool_destroy(instance
->frame_dma_pool
);
1463 pci_pool_destroy(instance
->sense_dma_pool
);
1465 instance
->frame_dma_pool
= NULL
;
1466 instance
->sense_dma_pool
= NULL
;
1470 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1471 * @instance: Adapter soft state
1473 * Each command packet has an embedded DMA memory buffer that is used for
1474 * filling MFI frame and the SG list that immediately follows the frame. This
1475 * function creates those DMA memory buffers for each command packet by using
1476 * PCI pool facility.
1478 static int megasas_create_frame_pool(struct megasas_instance
*instance
)
1486 struct megasas_cmd
*cmd
;
1488 max_cmd
= instance
->max_fw_cmds
;
1491 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1492 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1494 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
1495 sizeof(struct megasas_sge32
);
1498 * Calculated the number of 64byte frames required for SGL
1500 sgl_sz
= sge_sz
* instance
->max_num_sge
;
1501 frame_count
= (sgl_sz
+ MEGAMFI_FRAME_SIZE
- 1) / MEGAMFI_FRAME_SIZE
;
1504 * We need one extra frame for the MFI command
1508 total_sz
= MEGAMFI_FRAME_SIZE
* frame_count
;
1510 * Use DMA pool facility provided by PCI layer
1512 instance
->frame_dma_pool
= pci_pool_create("megasas frame pool",
1513 instance
->pdev
, total_sz
, 64,
1516 if (!instance
->frame_dma_pool
) {
1517 printk(KERN_DEBUG
"megasas: failed to setup frame pool\n");
1521 instance
->sense_dma_pool
= pci_pool_create("megasas sense pool",
1522 instance
->pdev
, 128, 4, 0);
1524 if (!instance
->sense_dma_pool
) {
1525 printk(KERN_DEBUG
"megasas: failed to setup sense pool\n");
1527 pci_pool_destroy(instance
->frame_dma_pool
);
1528 instance
->frame_dma_pool
= NULL
;
1534 * Allocate and attach a frame to each of the commands in cmd_list.
1535 * By making cmd->index as the context instead of the &cmd, we can
1536 * always use 32bit context regardless of the architecture
1538 for (i
= 0; i
< max_cmd
; i
++) {
1540 cmd
= instance
->cmd_list
[i
];
1542 cmd
->frame
= pci_pool_alloc(instance
->frame_dma_pool
,
1543 GFP_KERNEL
, &cmd
->frame_phys_addr
);
1545 cmd
->sense
= pci_pool_alloc(instance
->sense_dma_pool
,
1546 GFP_KERNEL
, &cmd
->sense_phys_addr
);
1549 * megasas_teardown_frame_pool() takes care of freeing
1550 * whatever has been allocated
1552 if (!cmd
->frame
|| !cmd
->sense
) {
1553 printk(KERN_DEBUG
"megasas: pci_pool_alloc failed \n");
1554 megasas_teardown_frame_pool(instance
);
1558 cmd
->frame
->io
.context
= cmd
->index
;
1565 * megasas_free_cmds - Free all the cmds in the free cmd pool
1566 * @instance: Adapter soft state
1568 static void megasas_free_cmds(struct megasas_instance
*instance
)
1571 /* First free the MFI frame pool */
1572 megasas_teardown_frame_pool(instance
);
1574 /* Free all the commands in the cmd_list */
1575 for (i
= 0; i
< instance
->max_fw_cmds
; i
++)
1576 kfree(instance
->cmd_list
[i
]);
1578 /* Free the cmd_list buffer itself */
1579 kfree(instance
->cmd_list
);
1580 instance
->cmd_list
= NULL
;
1582 INIT_LIST_HEAD(&instance
->cmd_pool
);
1586 * megasas_alloc_cmds - Allocates the command packets
1587 * @instance: Adapter soft state
1589 * Each command that is issued to the FW, whether IO commands from the OS or
1590 * internal commands like IOCTLs, are wrapped in local data structure called
1591 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1594 * Each frame has a 32-bit field called context (tag). This context is used
1595 * to get back the megasas_cmd from the frame when a frame gets completed in
1596 * the ISR. Typically the address of the megasas_cmd itself would be used as
1597 * the context. But we wanted to keep the differences between 32 and 64 bit
1598 * systems to the mininum. We always use 32 bit integers for the context. In
1599 * this driver, the 32 bit values are the indices into an array cmd_list.
1600 * This array is used only to look up the megasas_cmd given the context. The
1601 * free commands themselves are maintained in a linked list called cmd_pool.
1603 static int megasas_alloc_cmds(struct megasas_instance
*instance
)
1608 struct megasas_cmd
*cmd
;
1610 max_cmd
= instance
->max_fw_cmds
;
1613 * instance->cmd_list is an array of struct megasas_cmd pointers.
1614 * Allocate the dynamic array first and then allocate individual
1617 instance
->cmd_list
= kmalloc(sizeof(struct megasas_cmd
*) * max_cmd
,
1620 if (!instance
->cmd_list
) {
1621 printk(KERN_DEBUG
"megasas: out of memory\n");
1625 memset(instance
->cmd_list
, 0, sizeof(struct megasas_cmd
*) * max_cmd
);
1627 for (i
= 0; i
< max_cmd
; i
++) {
1628 instance
->cmd_list
[i
] = kmalloc(sizeof(struct megasas_cmd
),
1631 if (!instance
->cmd_list
[i
]) {
1633 for (j
= 0; j
< i
; j
++)
1634 kfree(instance
->cmd_list
[j
]);
1636 kfree(instance
->cmd_list
);
1637 instance
->cmd_list
= NULL
;
1644 * Add all the commands to command pool (instance->cmd_pool)
1646 for (i
= 0; i
< max_cmd
; i
++) {
1647 cmd
= instance
->cmd_list
[i
];
1648 memset(cmd
, 0, sizeof(struct megasas_cmd
));
1650 cmd
->instance
= instance
;
1652 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
1656 * Create a frame pool and assign one frame to each cmd
1658 if (megasas_create_frame_pool(instance
)) {
1659 printk(KERN_DEBUG
"megasas: Error creating frame DMA pool\n");
1660 megasas_free_cmds(instance
);
1667 * megasas_get_controller_info - Returns FW's controller structure
1668 * @instance: Adapter soft state
1669 * @ctrl_info: Controller information structure
1671 * Issues an internal command (DCMD) to get the FW's controller structure.
1672 * This information is mainly used to find out the maximum IO transfer per
1673 * command supported by the FW.
1676 megasas_get_ctrl_info(struct megasas_instance
*instance
,
1677 struct megasas_ctrl_info
*ctrl_info
)
1680 struct megasas_cmd
*cmd
;
1681 struct megasas_dcmd_frame
*dcmd
;
1682 struct megasas_ctrl_info
*ci
;
1683 dma_addr_t ci_h
= 0;
1685 cmd
= megasas_get_cmd(instance
);
1688 printk(KERN_DEBUG
"megasas: Failed to get a free cmd\n");
1692 dcmd
= &cmd
->frame
->dcmd
;
1694 ci
= pci_alloc_consistent(instance
->pdev
,
1695 sizeof(struct megasas_ctrl_info
), &ci_h
);
1698 printk(KERN_DEBUG
"Failed to alloc mem for ctrl info\n");
1699 megasas_return_cmd(instance
, cmd
);
1703 memset(ci
, 0, sizeof(*ci
));
1704 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
1706 dcmd
->cmd
= MFI_CMD_DCMD
;
1707 dcmd
->cmd_status
= 0xFF;
1708 dcmd
->sge_count
= 1;
1709 dcmd
->flags
= MFI_FRAME_DIR_READ
;
1711 dcmd
->data_xfer_len
= sizeof(struct megasas_ctrl_info
);
1712 dcmd
->opcode
= MR_DCMD_CTRL_GET_INFO
;
1713 dcmd
->sgl
.sge32
[0].phys_addr
= ci_h
;
1714 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_ctrl_info
);
1716 if (!megasas_issue_polled(instance
, cmd
)) {
1718 memcpy(ctrl_info
, ci
, sizeof(struct megasas_ctrl_info
));
1723 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_ctrl_info
),
1726 megasas_return_cmd(instance
, cmd
);
1731 * megasas_complete_cmd_dpc - Returns FW's controller structure
1732 * @instance_addr: Address of adapter soft state
1734 * Tasklet to complete cmds
1736 static void megasas_complete_cmd_dpc(unsigned long instance_addr
)
1741 struct megasas_cmd
*cmd
;
1742 struct megasas_instance
*instance
= (struct megasas_instance
*)instance_addr
;
1744 producer
= *instance
->producer
;
1745 consumer
= *instance
->consumer
;
1747 while (consumer
!= producer
) {
1748 context
= instance
->reply_queue
[consumer
];
1750 cmd
= instance
->cmd_list
[context
];
1752 megasas_complete_cmd(instance
, cmd
, DID_OK
);
1755 if (consumer
== (instance
->max_fw_cmds
+ 1)) {
1760 *instance
->consumer
= producer
;
1764 * megasas_init_mfi - Initializes the FW
1765 * @instance: Adapter soft state
1767 * This is the main function for initializing MFI firmware.
1769 static int megasas_init_mfi(struct megasas_instance
*instance
)
1775 struct megasas_register_set __iomem
*reg_set
;
1777 struct megasas_cmd
*cmd
;
1778 struct megasas_ctrl_info
*ctrl_info
;
1780 struct megasas_init_frame
*init_frame
;
1781 struct megasas_init_queue_info
*initq_info
;
1782 dma_addr_t init_frame_h
;
1783 dma_addr_t initq_info_h
;
1786 * Map the message registers
1788 instance
->base_addr
= pci_resource_start(instance
->pdev
, 0);
1790 if (pci_request_regions(instance
->pdev
, "megasas: LSI Logic")) {
1791 printk(KERN_DEBUG
"megasas: IO memory region busy!\n");
1795 instance
->reg_set
= ioremap_nocache(instance
->base_addr
, 8192);
1797 if (!instance
->reg_set
) {
1798 printk(KERN_DEBUG
"megasas: Failed to map IO mem\n");
1802 reg_set
= instance
->reg_set
;
1804 switch(instance
->pdev
->device
)
1806 case PCI_DEVICE_ID_LSI_SAS1078R
:
1807 instance
->instancet
= &megasas_instance_template_ppc
;
1809 case PCI_DEVICE_ID_LSI_SAS1064R
:
1810 case PCI_DEVICE_ID_DELL_PERC5
:
1812 instance
->instancet
= &megasas_instance_template_xscale
;
1817 * We expect the FW state to be READY
1819 if (megasas_transition_to_ready(instance
))
1820 goto fail_ready_state
;
1823 * Get various operational parameters from status register
1825 instance
->max_fw_cmds
= instance
->instancet
->read_fw_status_reg(reg_set
) & 0x00FFFF;
1827 * Reduce the max supported cmds by 1. This is to ensure that the
1828 * reply_q_sz (1 more than the max cmd that driver may send)
1829 * does not exceed max cmds that the FW can support
1831 instance
->max_fw_cmds
= instance
->max_fw_cmds
-1;
1832 instance
->max_num_sge
= (instance
->instancet
->read_fw_status_reg(reg_set
) & 0xFF0000) >>
1835 * Create a pool of commands
1837 if (megasas_alloc_cmds(instance
))
1838 goto fail_alloc_cmds
;
1841 * Allocate memory for reply queue. Length of reply queue should
1842 * be _one_ more than the maximum commands handled by the firmware.
1844 * Note: When FW completes commands, it places corresponding contex
1845 * values in this circular reply queue. This circular queue is a fairly
1846 * typical producer-consumer queue. FW is the producer (of completed
1847 * commands) and the driver is the consumer.
1849 context_sz
= sizeof(u32
);
1850 reply_q_sz
= context_sz
* (instance
->max_fw_cmds
+ 1);
1852 instance
->reply_queue
= pci_alloc_consistent(instance
->pdev
,
1854 &instance
->reply_queue_h
);
1856 if (!instance
->reply_queue
) {
1857 printk(KERN_DEBUG
"megasas: Out of DMA mem for reply queue\n");
1858 goto fail_reply_queue
;
1862 * Prepare a init frame. Note the init frame points to queue info
1863 * structure. Each frame has SGL allocated after first 64 bytes. For
1864 * this frame - since we don't need any SGL - we use SGL's space as
1865 * queue info structure
1867 * We will not get a NULL command below. We just created the pool.
1869 cmd
= megasas_get_cmd(instance
);
1871 init_frame
= (struct megasas_init_frame
*)cmd
->frame
;
1872 initq_info
= (struct megasas_init_queue_info
*)
1873 ((unsigned long)init_frame
+ 64);
1875 init_frame_h
= cmd
->frame_phys_addr
;
1876 initq_info_h
= init_frame_h
+ 64;
1878 memset(init_frame
, 0, MEGAMFI_FRAME_SIZE
);
1879 memset(initq_info
, 0, sizeof(struct megasas_init_queue_info
));
1881 initq_info
->reply_queue_entries
= instance
->max_fw_cmds
+ 1;
1882 initq_info
->reply_queue_start_phys_addr_lo
= instance
->reply_queue_h
;
1884 initq_info
->producer_index_phys_addr_lo
= instance
->producer_h
;
1885 initq_info
->consumer_index_phys_addr_lo
= instance
->consumer_h
;
1887 init_frame
->cmd
= MFI_CMD_INIT
;
1888 init_frame
->cmd_status
= 0xFF;
1889 init_frame
->queue_info_new_phys_addr_lo
= initq_info_h
;
1891 init_frame
->data_xfer_len
= sizeof(struct megasas_init_queue_info
);
1894 * disable the intr before firing the init frame to FW
1896 instance
->instancet
->disable_intr(instance
->reg_set
);
1899 * Issue the init frame in polled mode
1901 if (megasas_issue_polled(instance
, cmd
)) {
1902 printk(KERN_DEBUG
"megasas: Failed to init firmware\n");
1906 megasas_return_cmd(instance
, cmd
);
1908 ctrl_info
= kmalloc(sizeof(struct megasas_ctrl_info
), GFP_KERNEL
);
1911 * Compute the max allowed sectors per IO: The controller info has two
1912 * limits on max sectors. Driver should use the minimum of these two.
1914 * 1 << stripe_sz_ops.min = max sectors per strip
1916 * Note that older firmwares ( < FW ver 30) didn't report information
1917 * to calculate max_sectors_1. So the number ended up as zero always.
1919 if (ctrl_info
&& !megasas_get_ctrl_info(instance
, ctrl_info
)) {
1921 max_sectors_1
= (1 << ctrl_info
->stripe_sz_ops
.min
) *
1922 ctrl_info
->max_strips_per_io
;
1923 max_sectors_2
= ctrl_info
->max_request_size
;
1925 instance
->max_sectors_per_req
= (max_sectors_1
< max_sectors_2
)
1926 ? max_sectors_1
: max_sectors_2
;
1928 instance
->max_sectors_per_req
= instance
->max_num_sge
*
1934 * Setup tasklet for cmd completion
1937 tasklet_init(&instance
->isr_tasklet
, megasas_complete_cmd_dpc
,
1938 (unsigned long)instance
);
1942 megasas_return_cmd(instance
, cmd
);
1944 pci_free_consistent(instance
->pdev
, reply_q_sz
,
1945 instance
->reply_queue
, instance
->reply_queue_h
);
1947 megasas_free_cmds(instance
);
1951 iounmap(instance
->reg_set
);
1954 pci_release_regions(instance
->pdev
);
1960 * megasas_release_mfi - Reverses the FW initialization
1961 * @intance: Adapter soft state
1963 static void megasas_release_mfi(struct megasas_instance
*instance
)
1965 u32 reply_q_sz
= sizeof(u32
) * (instance
->max_fw_cmds
+ 1);
1967 pci_free_consistent(instance
->pdev
, reply_q_sz
,
1968 instance
->reply_queue
, instance
->reply_queue_h
);
1970 megasas_free_cmds(instance
);
1972 iounmap(instance
->reg_set
);
1974 pci_release_regions(instance
->pdev
);
1978 * megasas_get_seq_num - Gets latest event sequence numbers
1979 * @instance: Adapter soft state
1980 * @eli: FW event log sequence numbers information
1982 * FW maintains a log of all events in a non-volatile area. Upper layers would
1983 * usually find out the latest sequence number of the events, the seq number at
1984 * the boot etc. They would "read" all the events below the latest seq number
1985 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
1986 * number), they would subsribe to AEN (asynchronous event notification) and
1987 * wait for the events to happen.
1990 megasas_get_seq_num(struct megasas_instance
*instance
,
1991 struct megasas_evt_log_info
*eli
)
1993 struct megasas_cmd
*cmd
;
1994 struct megasas_dcmd_frame
*dcmd
;
1995 struct megasas_evt_log_info
*el_info
;
1996 dma_addr_t el_info_h
= 0;
1998 cmd
= megasas_get_cmd(instance
);
2004 dcmd
= &cmd
->frame
->dcmd
;
2005 el_info
= pci_alloc_consistent(instance
->pdev
,
2006 sizeof(struct megasas_evt_log_info
),
2010 megasas_return_cmd(instance
, cmd
);
2014 memset(el_info
, 0, sizeof(*el_info
));
2015 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2017 dcmd
->cmd
= MFI_CMD_DCMD
;
2018 dcmd
->cmd_status
= 0x0;
2019 dcmd
->sge_count
= 1;
2020 dcmd
->flags
= MFI_FRAME_DIR_READ
;
2022 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_log_info
);
2023 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_GET_INFO
;
2024 dcmd
->sgl
.sge32
[0].phys_addr
= el_info_h
;
2025 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_log_info
);
2027 megasas_issue_blocked_cmd(instance
, cmd
);
2030 * Copy the data back into callers buffer
2032 memcpy(eli
, el_info
, sizeof(struct megasas_evt_log_info
));
2034 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_evt_log_info
),
2035 el_info
, el_info_h
);
2037 megasas_return_cmd(instance
, cmd
);
2043 * megasas_register_aen - Registers for asynchronous event notification
2044 * @instance: Adapter soft state
2045 * @seq_num: The starting sequence number
2046 * @class_locale: Class of the event
2048 * This function subscribes for AEN for events beyond the @seq_num. It requests
2049 * to be notified if and only if the event is of type @class_locale
2052 megasas_register_aen(struct megasas_instance
*instance
, u32 seq_num
,
2053 u32 class_locale_word
)
2056 struct megasas_cmd
*cmd
;
2057 struct megasas_dcmd_frame
*dcmd
;
2058 union megasas_evt_class_locale curr_aen
;
2059 union megasas_evt_class_locale prev_aen
;
2062 * If there an AEN pending already (aen_cmd), check if the
2063 * class_locale of that pending AEN is inclusive of the new
2064 * AEN request we currently have. If it is, then we don't have
2065 * to do anything. In other words, whichever events the current
2066 * AEN request is subscribing to, have already been subscribed
2069 * If the old_cmd is _not_ inclusive, then we have to abort
2070 * that command, form a class_locale that is superset of both
2071 * old and current and re-issue to the FW
2074 curr_aen
.word
= class_locale_word
;
2076 if (instance
->aen_cmd
) {
2078 prev_aen
.word
= instance
->aen_cmd
->frame
->dcmd
.mbox
.w
[1];
2081 * A class whose enum value is smaller is inclusive of all
2082 * higher values. If a PROGRESS (= -1) was previously
2083 * registered, then a new registration requests for higher
2084 * classes need not be sent to FW. They are automatically
2087 * Locale numbers don't have such hierarchy. They are bitmap
2090 if ((prev_aen
.members
.class <= curr_aen
.members
.class) &&
2091 !((prev_aen
.members
.locale
& curr_aen
.members
.locale
) ^
2092 curr_aen
.members
.locale
)) {
2094 * Previously issued event registration includes
2095 * current request. Nothing to do.
2099 curr_aen
.members
.locale
|= prev_aen
.members
.locale
;
2101 if (prev_aen
.members
.class < curr_aen
.members
.class)
2102 curr_aen
.members
.class = prev_aen
.members
.class;
2104 instance
->aen_cmd
->abort_aen
= 1;
2105 ret_val
= megasas_issue_blocked_abort_cmd(instance
,
2110 printk(KERN_DEBUG
"megasas: Failed to abort "
2111 "previous AEN command\n");
2117 cmd
= megasas_get_cmd(instance
);
2122 dcmd
= &cmd
->frame
->dcmd
;
2124 memset(instance
->evt_detail
, 0, sizeof(struct megasas_evt_detail
));
2127 * Prepare DCMD for aen registration
2129 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2131 dcmd
->cmd
= MFI_CMD_DCMD
;
2132 dcmd
->cmd_status
= 0x0;
2133 dcmd
->sge_count
= 1;
2134 dcmd
->flags
= MFI_FRAME_DIR_READ
;
2136 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_detail
);
2137 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_WAIT
;
2138 dcmd
->mbox
.w
[0] = seq_num
;
2139 dcmd
->mbox
.w
[1] = curr_aen
.word
;
2140 dcmd
->sgl
.sge32
[0].phys_addr
= (u32
) instance
->evt_detail_h
;
2141 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_detail
);
2144 * Store reference to the cmd used to register for AEN. When an
2145 * application wants us to register for AEN, we have to abort this
2146 * cmd and re-register with a new EVENT LOCALE supplied by that app
2148 instance
->aen_cmd
= cmd
;
2151 * Issue the aen registration frame
2153 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
2159 * megasas_start_aen - Subscribes to AEN during driver load time
2160 * @instance: Adapter soft state
2162 static int megasas_start_aen(struct megasas_instance
*instance
)
2164 struct megasas_evt_log_info eli
;
2165 union megasas_evt_class_locale class_locale
;
2168 * Get the latest sequence number from FW
2170 memset(&eli
, 0, sizeof(eli
));
2172 if (megasas_get_seq_num(instance
, &eli
))
2176 * Register AEN with FW for latest sequence number plus 1
2178 class_locale
.members
.reserved
= 0;
2179 class_locale
.members
.locale
= MR_EVT_LOCALE_ALL
;
2180 class_locale
.members
.class = MR_EVT_CLASS_DEBUG
;
2182 return megasas_register_aen(instance
, eli
.newest_seq_num
+ 1,
2187 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2188 * @instance: Adapter soft state
2190 static int megasas_io_attach(struct megasas_instance
*instance
)
2192 struct Scsi_Host
*host
= instance
->host
;
2195 * Export parameters required by SCSI mid-layer
2197 host
->irq
= instance
->pdev
->irq
;
2198 host
->unique_id
= instance
->unique_id
;
2199 host
->can_queue
= instance
->max_fw_cmds
- MEGASAS_INT_CMDS
;
2200 host
->this_id
= instance
->init_id
;
2201 host
->sg_tablesize
= instance
->max_num_sge
;
2202 host
->max_sectors
= instance
->max_sectors_per_req
;
2203 host
->cmd_per_lun
= 128;
2204 host
->max_channel
= MEGASAS_MAX_CHANNELS
- 1;
2205 host
->max_id
= MEGASAS_MAX_DEV_PER_CHANNEL
;
2206 host
->max_lun
= MEGASAS_MAX_LUN
;
2207 host
->max_cmd_len
= 16;
2210 * Notify the mid-layer about the new controller
2212 if (scsi_add_host(host
, &instance
->pdev
->dev
)) {
2213 printk(KERN_DEBUG
"megasas: scsi_add_host failed\n");
2218 * Trigger SCSI to scan our drives
2220 scsi_scan_host(host
);
2225 * megasas_probe_one - PCI hotplug entry point
2226 * @pdev: PCI device structure
2227 * @id: PCI ids of supported hotplugged adapter
2229 static int __devinit
2230 megasas_probe_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
2233 struct Scsi_Host
*host
;
2234 struct megasas_instance
*instance
;
2237 * Announce PCI information
2239 printk(KERN_INFO
"megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2240 pdev
->vendor
, pdev
->device
, pdev
->subsystem_vendor
,
2241 pdev
->subsystem_device
);
2243 printk("bus %d:slot %d:func %d\n",
2244 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
), PCI_FUNC(pdev
->devfn
));
2247 * PCI prepping: enable device set bus mastering and dma mask
2249 rval
= pci_enable_device(pdev
);
2255 pci_set_master(pdev
);
2258 * All our contollers are capable of performing 64-bit DMA
2261 if (pci_set_dma_mask(pdev
, DMA_64BIT_MASK
) != 0) {
2263 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2264 goto fail_set_dma_mask
;
2267 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2268 goto fail_set_dma_mask
;
2271 host
= scsi_host_alloc(&megasas_template
,
2272 sizeof(struct megasas_instance
));
2275 printk(KERN_DEBUG
"megasas: scsi_host_alloc failed\n");
2276 goto fail_alloc_instance
;
2279 instance
= (struct megasas_instance
*)host
->hostdata
;
2280 memset(instance
, 0, sizeof(*instance
));
2282 instance
->producer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2283 &instance
->producer_h
);
2284 instance
->consumer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2285 &instance
->consumer_h
);
2287 if (!instance
->producer
|| !instance
->consumer
) {
2288 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2289 "producer, consumer\n");
2290 goto fail_alloc_dma_buf
;
2293 *instance
->producer
= 0;
2294 *instance
->consumer
= 0;
2296 instance
->evt_detail
= pci_alloc_consistent(pdev
,
2298 megasas_evt_detail
),
2299 &instance
->evt_detail_h
);
2301 if (!instance
->evt_detail
) {
2302 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2303 "event detail structure\n");
2304 goto fail_alloc_dma_buf
;
2308 * Initialize locks and queues
2310 INIT_LIST_HEAD(&instance
->cmd_pool
);
2312 atomic_set(&instance
->fw_outstanding
,0);
2314 init_waitqueue_head(&instance
->int_cmd_wait_q
);
2315 init_waitqueue_head(&instance
->abort_cmd_wait_q
);
2317 spin_lock_init(&instance
->cmd_pool_lock
);
2319 sema_init(&instance
->aen_mutex
, 1);
2320 sema_init(&instance
->ioctl_sem
, MEGASAS_INT_CMDS
);
2323 * Initialize PCI related and misc parameters
2325 instance
->pdev
= pdev
;
2326 instance
->host
= host
;
2327 instance
->unique_id
= pdev
->bus
->number
<< 8 | pdev
->devfn
;
2328 instance
->init_id
= MEGASAS_DEFAULT_INIT_ID
;
2330 megasas_dbg_lvl
= 0;
2333 * Initialize MFI Firmware
2335 if (megasas_init_mfi(instance
))
2341 if (request_irq(pdev
->irq
, megasas_isr
, IRQF_SHARED
, "megasas", instance
)) {
2342 printk(KERN_DEBUG
"megasas: Failed to register IRQ\n");
2346 instance
->instancet
->enable_intr(instance
->reg_set
);
2349 * Store instance in PCI softstate
2351 pci_set_drvdata(pdev
, instance
);
2354 * Add this controller to megasas_mgmt_info structure so that it
2355 * can be exported to management applications
2357 megasas_mgmt_info
.count
++;
2358 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = instance
;
2359 megasas_mgmt_info
.max_index
++;
2362 * Initiate AEN (Asynchronous Event Notification)
2364 if (megasas_start_aen(instance
)) {
2365 printk(KERN_DEBUG
"megasas: start aen failed\n");
2366 goto fail_start_aen
;
2370 * Register with SCSI mid-layer
2372 if (megasas_io_attach(instance
))
2373 goto fail_io_attach
;
2379 megasas_mgmt_info
.count
--;
2380 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = NULL
;
2381 megasas_mgmt_info
.max_index
--;
2383 pci_set_drvdata(pdev
, NULL
);
2384 instance
->instancet
->disable_intr(instance
->reg_set
);
2385 free_irq(instance
->pdev
->irq
, instance
);
2387 megasas_release_mfi(instance
);
2392 if (instance
->evt_detail
)
2393 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2394 instance
->evt_detail
,
2395 instance
->evt_detail_h
);
2397 if (instance
->producer
)
2398 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2399 instance
->producer_h
);
2400 if (instance
->consumer
)
2401 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2402 instance
->consumer_h
);
2403 scsi_host_put(host
);
2405 fail_alloc_instance
:
2407 pci_disable_device(pdev
);
2413 * megasas_flush_cache - Requests FW to flush all its caches
2414 * @instance: Adapter soft state
2416 static void megasas_flush_cache(struct megasas_instance
*instance
)
2418 struct megasas_cmd
*cmd
;
2419 struct megasas_dcmd_frame
*dcmd
;
2421 cmd
= megasas_get_cmd(instance
);
2426 dcmd
= &cmd
->frame
->dcmd
;
2428 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2430 dcmd
->cmd
= MFI_CMD_DCMD
;
2431 dcmd
->cmd_status
= 0x0;
2432 dcmd
->sge_count
= 0;
2433 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2435 dcmd
->data_xfer_len
= 0;
2436 dcmd
->opcode
= MR_DCMD_CTRL_CACHE_FLUSH
;
2437 dcmd
->mbox
.b
[0] = MR_FLUSH_CTRL_CACHE
| MR_FLUSH_DISK_CACHE
;
2439 megasas_issue_blocked_cmd(instance
, cmd
);
2441 megasas_return_cmd(instance
, cmd
);
2447 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2448 * @instance: Adapter soft state
2450 static void megasas_shutdown_controller(struct megasas_instance
*instance
)
2452 struct megasas_cmd
*cmd
;
2453 struct megasas_dcmd_frame
*dcmd
;
2455 cmd
= megasas_get_cmd(instance
);
2460 if (instance
->aen_cmd
)
2461 megasas_issue_blocked_abort_cmd(instance
, instance
->aen_cmd
);
2463 dcmd
= &cmd
->frame
->dcmd
;
2465 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2467 dcmd
->cmd
= MFI_CMD_DCMD
;
2468 dcmd
->cmd_status
= 0x0;
2469 dcmd
->sge_count
= 0;
2470 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2472 dcmd
->data_xfer_len
= 0;
2473 dcmd
->opcode
= MR_DCMD_CTRL_SHUTDOWN
;
2475 megasas_issue_blocked_cmd(instance
, cmd
);
2477 megasas_return_cmd(instance
, cmd
);
2483 * megasas_detach_one - PCI hot"un"plug entry point
2484 * @pdev: PCI device structure
2486 static void megasas_detach_one(struct pci_dev
*pdev
)
2489 struct Scsi_Host
*host
;
2490 struct megasas_instance
*instance
;
2492 instance
= pci_get_drvdata(pdev
);
2493 host
= instance
->host
;
2495 scsi_remove_host(instance
->host
);
2496 megasas_flush_cache(instance
);
2497 megasas_shutdown_controller(instance
);
2498 tasklet_kill(&instance
->isr_tasklet
);
2501 * Take the instance off the instance array. Note that we will not
2502 * decrement the max_index. We let this array be sparse array
2504 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
2505 if (megasas_mgmt_info
.instance
[i
] == instance
) {
2506 megasas_mgmt_info
.count
--;
2507 megasas_mgmt_info
.instance
[i
] = NULL
;
2513 pci_set_drvdata(instance
->pdev
, NULL
);
2515 instance
->instancet
->disable_intr(instance
->reg_set
);
2517 free_irq(instance
->pdev
->irq
, instance
);
2519 megasas_release_mfi(instance
);
2521 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2522 instance
->evt_detail
, instance
->evt_detail_h
);
2524 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2525 instance
->producer_h
);
2527 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2528 instance
->consumer_h
);
2530 scsi_host_put(host
);
2532 pci_set_drvdata(pdev
, NULL
);
2534 pci_disable_device(pdev
);
2540 * megasas_shutdown - Shutdown entry point
2541 * @device: Generic device structure
2543 static void megasas_shutdown(struct pci_dev
*pdev
)
2545 struct megasas_instance
*instance
= pci_get_drvdata(pdev
);
2546 megasas_flush_cache(instance
);
2550 * megasas_mgmt_open - char node "open" entry point
2552 static int megasas_mgmt_open(struct inode
*inode
, struct file
*filep
)
2555 * Allow only those users with admin rights
2557 if (!capable(CAP_SYS_ADMIN
))
2564 * megasas_mgmt_release - char node "release" entry point
2566 static int megasas_mgmt_release(struct inode
*inode
, struct file
*filep
)
2568 filep
->private_data
= NULL
;
2569 fasync_helper(-1, filep
, 0, &megasas_async_queue
);
2575 * megasas_mgmt_fasync - Async notifier registration from applications
2577 * This function adds the calling process to a driver global queue. When an
2578 * event occurs, SIGIO will be sent to all processes in this queue.
2580 static int megasas_mgmt_fasync(int fd
, struct file
*filep
, int mode
)
2584 mutex_lock(&megasas_async_queue_mutex
);
2586 rc
= fasync_helper(fd
, filep
, mode
, &megasas_async_queue
);
2588 mutex_unlock(&megasas_async_queue_mutex
);
2591 /* For sanity check when we get ioctl */
2592 filep
->private_data
= filep
;
2596 printk(KERN_DEBUG
"megasas: fasync_helper failed [%d]\n", rc
);
2602 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2603 * @instance: Adapter soft state
2604 * @argp: User's ioctl packet
2607 megasas_mgmt_fw_ioctl(struct megasas_instance
*instance
,
2608 struct megasas_iocpacket __user
* user_ioc
,
2609 struct megasas_iocpacket
*ioc
)
2611 struct megasas_sge32
*kern_sge32
;
2612 struct megasas_cmd
*cmd
;
2613 void *kbuff_arr
[MAX_IOCTL_SGE
];
2614 dma_addr_t buf_handle
= 0;
2617 dma_addr_t sense_handle
;
2620 memset(kbuff_arr
, 0, sizeof(kbuff_arr
));
2622 if (ioc
->sge_count
> MAX_IOCTL_SGE
) {
2623 printk(KERN_DEBUG
"megasas: SGE count [%d] > max limit [%d]\n",
2624 ioc
->sge_count
, MAX_IOCTL_SGE
);
2628 cmd
= megasas_get_cmd(instance
);
2630 printk(KERN_DEBUG
"megasas: Failed to get a cmd packet\n");
2635 * User's IOCTL packet has 2 frames (maximum). Copy those two
2636 * frames into our cmd's frames. cmd->frame's context will get
2637 * overwritten when we copy from user's frames. So set that value
2640 memcpy(cmd
->frame
, ioc
->frame
.raw
, 2 * MEGAMFI_FRAME_SIZE
);
2641 cmd
->frame
->hdr
.context
= cmd
->index
;
2644 * The management interface between applications and the fw uses
2645 * MFI frames. E.g, RAID configuration changes, LD property changes
2646 * etc are accomplishes through different kinds of MFI frames. The
2647 * driver needs to care only about substituting user buffers with
2648 * kernel buffers in SGLs. The location of SGL is embedded in the
2649 * struct iocpacket itself.
2651 kern_sge32
= (struct megasas_sge32
*)
2652 ((unsigned long)cmd
->frame
+ ioc
->sgl_off
);
2655 * For each user buffer, create a mirror buffer and copy in
2657 for (i
= 0; i
< ioc
->sge_count
; i
++) {
2658 kbuff_arr
[i
] = pci_alloc_consistent(instance
->pdev
,
2659 ioc
->sgl
[i
].iov_len
,
2661 if (!kbuff_arr
[i
]) {
2662 printk(KERN_DEBUG
"megasas: Failed to alloc "
2663 "kernel SGL buffer for IOCTL \n");
2669 * We don't change the dma_coherent_mask, so
2670 * pci_alloc_consistent only returns 32bit addresses
2672 kern_sge32
[i
].phys_addr
= (u32
) buf_handle
;
2673 kern_sge32
[i
].length
= ioc
->sgl
[i
].iov_len
;
2676 * We created a kernel buffer corresponding to the
2677 * user buffer. Now copy in from the user buffer
2679 if (copy_from_user(kbuff_arr
[i
], ioc
->sgl
[i
].iov_base
,
2680 (u32
) (ioc
->sgl
[i
].iov_len
))) {
2686 if (ioc
->sense_len
) {
2687 sense
= pci_alloc_consistent(instance
->pdev
, ioc
->sense_len
,
2695 (u32
*) ((unsigned long)cmd
->frame
+ ioc
->sense_off
);
2696 *sense_ptr
= sense_handle
;
2700 * Set the sync_cmd flag so that the ISR knows not to complete this
2701 * cmd to the SCSI mid-layer
2704 megasas_issue_blocked_cmd(instance
, cmd
);
2708 * copy out the kernel buffers to user buffers
2710 for (i
= 0; i
< ioc
->sge_count
; i
++) {
2711 if (copy_to_user(ioc
->sgl
[i
].iov_base
, kbuff_arr
[i
],
2712 ioc
->sgl
[i
].iov_len
)) {
2719 * copy out the sense
2721 if (ioc
->sense_len
) {
2723 * sense_ptr points to the location that has the user
2724 * sense buffer address
2726 sense_ptr
= (u32
*) ((unsigned long)ioc
->frame
.raw
+
2729 if (copy_to_user((void __user
*)((unsigned long)(*sense_ptr
)),
2730 sense
, ioc
->sense_len
)) {
2737 * copy the status codes returned by the fw
2739 if (copy_to_user(&user_ioc
->frame
.hdr
.cmd_status
,
2740 &cmd
->frame
->hdr
.cmd_status
, sizeof(u8
))) {
2741 printk(KERN_DEBUG
"megasas: Error copying out cmd_status\n");
2747 pci_free_consistent(instance
->pdev
, ioc
->sense_len
,
2748 sense
, sense_handle
);
2751 for (i
= 0; i
< ioc
->sge_count
&& kbuff_arr
[i
]; i
++) {
2752 pci_free_consistent(instance
->pdev
,
2753 kern_sge32
[i
].length
,
2754 kbuff_arr
[i
], kern_sge32
[i
].phys_addr
);
2757 megasas_return_cmd(instance
, cmd
);
2761 static struct megasas_instance
*megasas_lookup_instance(u16 host_no
)
2765 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
2767 if ((megasas_mgmt_info
.instance
[i
]) &&
2768 (megasas_mgmt_info
.instance
[i
]->host
->host_no
== host_no
))
2769 return megasas_mgmt_info
.instance
[i
];
2775 static int megasas_mgmt_ioctl_fw(struct file
*file
, unsigned long arg
)
2777 struct megasas_iocpacket __user
*user_ioc
=
2778 (struct megasas_iocpacket __user
*)arg
;
2779 struct megasas_iocpacket
*ioc
;
2780 struct megasas_instance
*instance
;
2783 ioc
= kmalloc(sizeof(*ioc
), GFP_KERNEL
);
2787 if (copy_from_user(ioc
, user_ioc
, sizeof(*ioc
))) {
2792 instance
= megasas_lookup_instance(ioc
->host_no
);
2799 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
2801 if (down_interruptible(&instance
->ioctl_sem
)) {
2802 error
= -ERESTARTSYS
;
2805 error
= megasas_mgmt_fw_ioctl(instance
, user_ioc
, ioc
);
2806 up(&instance
->ioctl_sem
);
2813 static int megasas_mgmt_ioctl_aen(struct file
*file
, unsigned long arg
)
2815 struct megasas_instance
*instance
;
2816 struct megasas_aen aen
;
2819 if (file
->private_data
!= file
) {
2820 printk(KERN_DEBUG
"megasas: fasync_helper was not "
2825 if (copy_from_user(&aen
, (void __user
*)arg
, sizeof(aen
)))
2828 instance
= megasas_lookup_instance(aen
.host_no
);
2833 down(&instance
->aen_mutex
);
2834 error
= megasas_register_aen(instance
, aen
.seq_num
,
2835 aen
.class_locale_word
);
2836 up(&instance
->aen_mutex
);
2841 * megasas_mgmt_ioctl - char node ioctl entry point
2844 megasas_mgmt_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
2847 case MEGASAS_IOC_FIRMWARE
:
2848 return megasas_mgmt_ioctl_fw(file
, arg
);
2850 case MEGASAS_IOC_GET_AEN
:
2851 return megasas_mgmt_ioctl_aen(file
, arg
);
2857 #ifdef CONFIG_COMPAT
2858 static int megasas_mgmt_compat_ioctl_fw(struct file
*file
, unsigned long arg
)
2860 struct compat_megasas_iocpacket __user
*cioc
=
2861 (struct compat_megasas_iocpacket __user
*)arg
;
2862 struct megasas_iocpacket __user
*ioc
=
2863 compat_alloc_user_space(sizeof(struct megasas_iocpacket
));
2867 if (clear_user(ioc
, sizeof(*ioc
)))
2870 if (copy_in_user(&ioc
->host_no
, &cioc
->host_no
, sizeof(u16
)) ||
2871 copy_in_user(&ioc
->sgl_off
, &cioc
->sgl_off
, sizeof(u32
)) ||
2872 copy_in_user(&ioc
->sense_off
, &cioc
->sense_off
, sizeof(u32
)) ||
2873 copy_in_user(&ioc
->sense_len
, &cioc
->sense_len
, sizeof(u32
)) ||
2874 copy_in_user(ioc
->frame
.raw
, cioc
->frame
.raw
, 128) ||
2875 copy_in_user(&ioc
->sge_count
, &cioc
->sge_count
, sizeof(u32
)))
2878 for (i
= 0; i
< MAX_IOCTL_SGE
; i
++) {
2881 if (get_user(ptr
, &cioc
->sgl
[i
].iov_base
) ||
2882 put_user(compat_ptr(ptr
), &ioc
->sgl
[i
].iov_base
) ||
2883 copy_in_user(&ioc
->sgl
[i
].iov_len
,
2884 &cioc
->sgl
[i
].iov_len
, sizeof(compat_size_t
)))
2888 error
= megasas_mgmt_ioctl_fw(file
, (unsigned long)ioc
);
2890 if (copy_in_user(&cioc
->frame
.hdr
.cmd_status
,
2891 &ioc
->frame
.hdr
.cmd_status
, sizeof(u8
))) {
2892 printk(KERN_DEBUG
"megasas: error copy_in_user cmd_status\n");
2899 megasas_mgmt_compat_ioctl(struct file
*file
, unsigned int cmd
,
2903 case MEGASAS_IOC_FIRMWARE32
:
2904 return megasas_mgmt_compat_ioctl_fw(file
, arg
);
2905 case MEGASAS_IOC_GET_AEN
:
2906 return megasas_mgmt_ioctl_aen(file
, arg
);
2914 * File operations structure for management interface
2916 static const struct file_operations megasas_mgmt_fops
= {
2917 .owner
= THIS_MODULE
,
2918 .open
= megasas_mgmt_open
,
2919 .release
= megasas_mgmt_release
,
2920 .fasync
= megasas_mgmt_fasync
,
2921 .unlocked_ioctl
= megasas_mgmt_ioctl
,
2922 #ifdef CONFIG_COMPAT
2923 .compat_ioctl
= megasas_mgmt_compat_ioctl
,
2928 * PCI hotplug support registration structure
2930 static struct pci_driver megasas_pci_driver
= {
2932 .name
= "megaraid_sas",
2933 .id_table
= megasas_pci_table
,
2934 .probe
= megasas_probe_one
,
2935 .remove
= __devexit_p(megasas_detach_one
),
2936 .shutdown
= megasas_shutdown
,
2940 * Sysfs driver attributes
2942 static ssize_t
megasas_sysfs_show_version(struct device_driver
*dd
, char *buf
)
2944 return snprintf(buf
, strlen(MEGASAS_VERSION
) + 2, "%s\n",
2948 static DRIVER_ATTR(version
, S_IRUGO
, megasas_sysfs_show_version
, NULL
);
2951 megasas_sysfs_show_release_date(struct device_driver
*dd
, char *buf
)
2953 return snprintf(buf
, strlen(MEGASAS_RELDATE
) + 2, "%s\n",
2957 static DRIVER_ATTR(release_date
, S_IRUGO
, megasas_sysfs_show_release_date
,
2961 megasas_sysfs_show_dbg_lvl(struct device_driver
*dd
, char *buf
)
2963 return sprintf(buf
,"%u",megasas_dbg_lvl
);
2967 megasas_sysfs_set_dbg_lvl(struct device_driver
*dd
, const char *buf
, size_t count
)
2970 if(sscanf(buf
,"%u",&megasas_dbg_lvl
)<1){
2971 printk(KERN_ERR
"megasas: could not set dbg_lvl\n");
2977 static DRIVER_ATTR(dbg_lvl
, S_IRUGO
|S_IWUGO
, megasas_sysfs_show_dbg_lvl
,
2978 megasas_sysfs_set_dbg_lvl
);
2981 * megasas_init - Driver load entry point
2983 static int __init
megasas_init(void)
2988 * Announce driver version and other information
2990 printk(KERN_INFO
"megasas: %s %s\n", MEGASAS_VERSION
,
2991 MEGASAS_EXT_VERSION
);
2993 memset(&megasas_mgmt_info
, 0, sizeof(megasas_mgmt_info
));
2996 * Register character device node
2998 rval
= register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops
);
3001 printk(KERN_DEBUG
"megasas: failed to open device node\n");
3005 megasas_mgmt_majorno
= rval
;
3008 * Register ourselves as PCI hotplug module
3010 rval
= pci_register_driver(&megasas_pci_driver
);
3013 printk(KERN_DEBUG
"megasas: PCI hotplug regisration failed \n");
3017 rval
= driver_create_file(&megasas_pci_driver
.driver
,
3018 &driver_attr_version
);
3020 goto err_dcf_attr_ver
;
3021 rval
= driver_create_file(&megasas_pci_driver
.driver
,
3022 &driver_attr_release_date
);
3024 goto err_dcf_rel_date
;
3025 rval
= driver_create_file(&megasas_pci_driver
.driver
,
3026 &driver_attr_dbg_lvl
);
3028 goto err_dcf_dbg_lvl
;
3032 driver_remove_file(&megasas_pci_driver
.driver
,
3033 &driver_attr_release_date
);
3035 driver_remove_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
3037 pci_unregister_driver(&megasas_pci_driver
);
3039 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
3044 * megasas_exit - Driver unload entry point
3046 static void __exit
megasas_exit(void)
3048 driver_remove_file(&megasas_pci_driver
.driver
,
3049 &driver_attr_dbg_lvl
);
3050 driver_remove_file(&megasas_pci_driver
.driver
,
3051 &driver_attr_release_date
);
3052 driver_remove_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
3054 pci_unregister_driver(&megasas_pci_driver
);
3055 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
3058 module_init(megasas_init
);
3059 module_exit(megasas_exit
);