Hi Leif,
Update the commit message again.
The D03/D05 SAS driver will fail to access disks beyond 2^32 sectors. Symptoms can include the system entering grub rescue mode. The issue log like this:
error: file `/boot/grub/arm64-efi/normal.mod' not found. Entering rescue mode... grub rescue>
This is because the sas driver in uefi always use CDB10 SCSI command, which is a 32 bit value, this command is used to read install data from sectors, if the sector index higher than 2^32, for such data read, the uefi sas driver previous will drop the higher bits. The sector index is passed from LBA in Block IO protocol. The sector size is 512 bytes, so when the HDD larger than 2TB will trigger this issue. This version we switch CDB16(64bit) mode for accessing sectors larger than 2^32. This commit resolves the issue https://bugs.linaro.org/show_bug.cgi?id=2393
Regards, Heyi
在 2017/1/10 20:02, Leif Lindholm 写道:
On Tue, Jan 10, 2017 at 02:06:47PM +0800, Heyi Guo wrote:
Hi Leif,
That make sense, thanks.
I refine the commit message acorrding to your comment.
Much improved, thanks. But a suggestion and a couple of requests for clarifications:
That could be found in my branch ssh://git@git.linaro.org/people/heyi.guo/OpenPlatformPkg.git.
Thanks and Regards.
Hisilicon D03/D05: add SCSI cdb16 command
Suggest add:
The D03/D05 SAS driver will fail to access disks beyond 2^32 sectors. Symptoms can include the system entering grub rescue mode...
The system may enter grub rescure mode if the user use a HDD larger than2TB. The issue log like this:
error: file `/boot/grub/arm64-efi/normal.mod' not found. Entering rescue mode... grub rescue> This is because the sas driver in uefi always use CDB10 SCSI command, which is a 32 bit value, this command is used to read install data fromsectors, if the sector index higher than 4G, for such data read, the uefi sas
Perhaps better worded as 2^32 than 4G, to reduce risk of confusion.
driver previous will drop the higher bits. The sector index is passed from LBA in Block IO protocol. The sector size is 512 bytes, so when the HDD larger than 2TB will trigger this issue.
This version we switch CDB16(64bit) mode for accessing disks of size larger than 2TB.Larger than 2TB (regardless of sector size) or larger than 2^32 sectors?
This commit resolves the issueWhile this is a clear fix, and should definitely go in - I still do not understand how this can resolve #2393 as described. The CDB16 support should make no difference between 1 or 2 drives being connected, right?
Do you have any ideas?
Regards,
Leif
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Chenhui Sun <sunchenhui@huawei.com> Signed-off-by: Jason Zhang <zhangjinsong2@huawei.com> Signed-off-by: Heyi Guo <heyi.guo@linaro.org>在 2017/1/10 1:11, Leif Lindholm 写道:
Hi Heyi,
(You forgot to add me to cc on the original submission - quite likely I would have missed this without the separate email.)
On Mon, Jan 09, 2017 at 02:11:36PM +0800, Heyi Guo wrote:
This patch resolves the issue 2393: https://bugs.linaro.org. The cdb16 command should be used if the hard disk size larger than 4TB.
Since I have no source code to reconciliate the commit message against, the commit message needs to be more detailed than this. It should contain the following:
- The user-visible problem that was seen before.
- What type of internal failure caused that problem.
- Why this change resolves the issue.
The Linaro bug is usful to include for reference, but it is not part of the description - it should go last in the commit message.
The summary (subject line) is fine and does not need changing.
Regards,
Leif
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Chenhui Sun sunchenhui@huawei.com Signed-off-by: Jason Zhang zhangjinsong2@huawei.com
.../Binary/D03/Drivers/Sas/SasDriverDxe.efi | Bin 210752 -> 208288 bytes .../Binary/D05/Drivers/Sas/SasDriverDxe.efi | Bin 210400 -> 230912 bytes 2 files changed, 0 insertions(+), 0 deletions(-)
diff --git a/Platforms/Hisilicon/Binary/D03/Drivers/Sas/SasDriverDxe.efi b/Platforms/Hisilicon/Binary/D03/Drivers/Sas/SasDriverDxe.efi index b956b19..19cd038 100644 Binary files a/Platforms/Hisilicon/Binary/D03/Drivers/Sas/SasDriverDxe.efi and b/Platforms/Hisilicon/Binary/D03/Drivers/Sas/SasDriverDxe.efi differ diff --git a/Platforms/Hisilicon/Binary/D05/Drivers/Sas/SasDriverDxe.efi b/Platforms/Hisilicon/Binary/D05/Drivers/Sas/SasDriverDxe.efi index 6021d12..8d9ecd2 100644 Binary files a/Platforms/Hisilicon/Binary/D05/Drivers/Sas/SasDriverDxe.efi and b/Platforms/Hisilicon/Binary/D05/Drivers/Sas/SasDriverDxe.efi differ -- 1.9.1
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