diff options
| author | Ju, Seokmann <Seokmann.Ju@lsil.com> | 2006-07-25 08:44:48 -0600 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-07-28 13:10:23 -0500 |
| commit | fbf6080225a03aa2b3671acacebdf615f1d3f6ba (patch) | |
| tree | 8813b1849713b29b52e73bfef8912b7e35b547ea /drivers/scsi/megaraid/mega_common.h | |
| parent | f4246b33c774bb4330eb6286beed6d3c9f4373c4 (diff) | |
[SCSI] megaraid_{mm,mbox}: 64-bit DMA capability checker
This patch contains
- a fix for 64-bit DMA capability check in megaraid_{mm,mbox} driver.
- includes changes (going back to 32-bit DMA mask if 64-bit DMA mask
failes) suggested by James with previous patch.
- addition of SATA 150-4/6 as commented by Vasily Averin.
With patch, the driver access PCIconfiguration space with dedicated
offset to read a signature. If the signature read, it means that the
controller has capability to handle 64-bit DMA.
Without this patch, the driver used to blindly claim 64-bit DMA
capability.
The issue has been reported by Vasily Averin [vvs@sw.ru].
Thank you Vasily for the reporting.
Signed-Off By: Seokmann Ju <seokmann.ju@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/megaraid/mega_common.h')
| -rw-r--r-- | drivers/scsi/megaraid/mega_common.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/mega_common.h b/drivers/scsi/megaraid/mega_common.h index 4675343228a..12e38125b12 100644 --- a/drivers/scsi/megaraid/mega_common.h +++ b/drivers/scsi/megaraid/mega_common.h @@ -37,6 +37,9 @@ #define LSI_MAX_CHANNELS 16 #define LSI_MAX_LOGICAL_DRIVES_64LD (64+1) +#define HBA_SIGNATURE_64_BIT 0x299 +#define PCI_CONF_AMISIG64 0xa4 + /** * scb_t - scsi command control block |