diff options
| author | Sreekanth Reddy <Sreekanth.Reddy@lsi.com> | 2013-06-29 03:51:19 +0530 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-07-09 08:39:03 +0100 |
| commit | b453ff84de6caf3ad3a988da8444c13b71e3f507 (patch) | |
| tree | 5cd8322595cd3935c9f49db405507fb09f061d47 /drivers/scsi | |
| parent | 48e3b9855d6e1b408ec4a808f243e858a78f4482 (diff) | |
| download | lwn-b453ff84de6caf3ad3a988da8444c13b71e3f507.tar.gz lwn-b453ff84de6caf3ad3a988da8444c13b71e3f507.zip | |
[SCSI] mpt3sas: Updated the Hardware timing requirements
Hardware timing requirements is updated in order to comply with firmware
requirement.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 673a1b53a23f..5dc280c75325 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -4090,11 +4090,15 @@ _base_diag_reset(struct MPT3SAS_ADAPTER *ioc, int sleep_flag) writel(host_diagnostic | MPI2_DIAG_RESET_ADAPTER, &ioc->chip->HostDiagnostic); - /* don't access any registers for 50 milliseconds */ - msleep(50); + /*This delay allows the chip PCIe hardware time to finish reset tasks*/ + if (sleep_flag == CAN_SLEEP) + msleep(MPI2_HARD_RESET_PCIE_FIRST_READ_DELAY_MICRO_SEC/1000); + else + mdelay(MPI2_HARD_RESET_PCIE_FIRST_READ_DELAY_MICRO_SEC/1000); - /* 300 second max wait */ - for (count = 0; count < 3000000 ; count++) { + /* Approximately 300 second max wait */ + for (count = 0; count < (300000000 / + MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC); count++) { host_diagnostic = readl(&ioc->chip->HostDiagnostic); @@ -4103,11 +4107,13 @@ _base_diag_reset(struct MPT3SAS_ADAPTER *ioc, int sleep_flag) if (!(host_diagnostic & MPI2_DIAG_RESET_ADAPTER)) break; - /* wait 1 msec */ + /* Wait to pass the second read delay window */ if (sleep_flag == CAN_SLEEP) - usleep_range(1000, 1500); + msleep(MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC + / 1000); else - mdelay(1); + mdelay(MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC + / 1000); } if (host_diagnostic & MPI2_DIAG_HCB_MODE) { |