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cciss: use new doorbell-bit-5 reset method 

The bit-2-doorbell reset method seemed to cause (survivable) NMIs
on some systems and (unsurvivable) IOCK NMIs on some G7 servers.
Firmware guys implemented a new doorbell method to alleviate these
problems triggered by bit 5 of the doorbell register.  We want to
use it if it's available.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Stephen M. Cameron 2011-05-03 14:53:46 -05:00 committed by Jens Axboe
parent 3e28601fdf
commit bf2e2e6b87
2 changed files with 16 additions and 11 deletions
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25
drivers/block/cciss.c
View File

@ -4384,7 +4384,7 @@ static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, u
#define cciss_noop(p) cciss_message(p, 3, 0)
static int cciss_controller_hard_reset(struct pci_dev *pdev,
void * __iomem vaddr, bool use_doorbell)
void * __iomem vaddr, u32 use_doorbell)
{
u16 pmcsr;
int pos;
@ -4395,7 +4395,7 @@ static int cciss_controller_hard_reset(struct pci_dev *pdev,
* other way using the doorbell register.
*/
dev_info(&pdev->dev, "using doorbell to reset controller\n");
writel(DOORBELL_CTLR_RESET, vaddr + SA5_DOORBELL);
writel(use_doorbell, vaddr + SA5_DOORBELL);
msleep(1000);
} else { /* Try to do it the PCI power state way */
@ -4499,7 +4499,7 @@ static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
u32 misc_fw_support;
int rc;
CfgTable_struct __iomem *cfgtable;
bool use_doorbell;
u32 use_doorbell;
u32 board_id;
u16 command_register;
@ -4560,15 +4560,18 @@ static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
if (rc)
goto unmap_vaddr;
/* If reset via doorbell register is supported, use that. */
misc_fw_support = readl(&cfgtable->misc_fw_support);
use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
/* The doorbell reset seems to cause lockups on some Smart
* Arrays (e.g. P410, P410i, maybe others). Until this is
* fixed or at least isolated, avoid the doorbell reset.
/* If reset via doorbell register is supported, use that.
* There are two such methods. Favor the newest method.
*/
use_doorbell = 0;
misc_fw_support = readl(&cfgtable->misc_fw_support);
use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
if (use_doorbell) {
use_doorbell = DOORBELL_CTLR_RESET2;
} else {
use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
if (use_doorbell)
use_doorbell = DOORBELL_CTLR_RESET;
}
rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell);
if (rc)

2
drivers/block/cciss_cmd.h
View File

@ -53,6 +53,7 @@
#define CFGTBL_ChangeReq 0x00000001l
#define CFGTBL_AccCmds 0x00000001l
#define DOORBELL_CTLR_RESET 0x00000004l
#define DOORBELL_CTLR_RESET2 0x00000020l
#define CFGTBL_Trans_Simple 0x00000002l
#define CFGTBL_Trans_Performant 0x00000004l
@ -243,6 +244,7 @@ typedef struct _CfgTable_struct {
u8 reserved[0x78 - 0x58];
u32 misc_fw_support; /* offset 0x78 */
#define MISC_FW_DOORBELL_RESET (0x02)
#define MISC_FW_DOORBELL_RESET2 (0x10)
u8 driver_version[32];
} CfgTable_struct;