On 2018/08/06 13:51, Douglas Gilbert wrote:
> Break out the sense key handling in the sd_done() (response) path into
> its own function. Note that the sense key only needs to be inspected
> when a SCSI status of Check Condition is returned.
It looks like sd_done_sense() is called for any command t
Douglas,
On 2018/08/06 13:51, Douglas Gilbert wrote:
> Add bounds_check "rw" attribute to the sd driver. It controls whether
> each read/write operation submission does an "out of range" bounds check
> and a LBA/number_of_blocks alignment bounds check. The mainline kernel
> currently does both the
On 2018/08/06 13:51, Douglas Gilbert wrote:
> Make the two block layer operations most frequently used (REQ_OP_READ
> and REQ_OP_WRITE) bypass the switch statements in the submission and
> response paths. Assume these two enums are 0 and 1 which allows a
> single comparison to select both of them.
On 2018/08/06 13:51, Douglas Gilbert wrote:
> Re-arrange some logic to lessen the number of checks. With logical
> ANDs put the least likely first, with logical ORs put the most
> likely first. Also add conditional hints on the assumed fastpath.
>
> Signed-off-by: Douglas Gilbert
> ---
> drivers
Add bounds_check "rw" attribute to the sd driver. It controls whether
each read/write operation submission does an "out of range" bounds check
and a LBA/number_of_blocks alignment bounds check. The mainline kernel
currently does both these checks. This patch changes that default
to bounds_check=fal
Re-arrange some logic to lessen the number of checks. With logical
ANDs put the least likely first, with logical ORs put the most
likely first. Also add conditional hints on the assumed fastpath.
Signed-off-by: Douglas Gilbert
---
drivers/scsi/sd.c | 43 --
REQ_OP_FLUSH appears in the submission path processing but not in
the response path processing. Hence it takes the "default" case
which seems to be designed for REQ_OP_READ and REQ_OP_WRITE.
So add a REQ_OP_FLUSH case to the response path.
Signed-off-by: Douglas Gilbert
---
Is it correct to trea
Make the two block layer operations most frequently used (REQ_OP_READ
and REQ_OP_WRITE) bypass the switch statements in the submission and
response paths. Assume these two enums are 0 and 1 which allows a
single comparison to select both of them. Check that assumption
at driver start-up.
Signed-of
This patchset is against Martin Petersen's (mkp) repository:
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/linux.git
branch: 4.19/scsi
Note: this is not the repository mkp uses for normal SCSI
subsystem submissions (whose url ends with .../mkp/scsi.git).
Note 2: even though the branch is c
Break out the sense key handling in the sd_done() (response) path into
its own function. Note that the sense key only needs to be inspected
when a SCSI status of Check Condition is returned.
Signed-off-by: Douglas Gilbert
---
No speed up here, just a clean up. There could possibly be a speed
im
Do that for the currently supported UPIUs:
query, nop out, and task management.
We do not support UPIU of type scsi command yet, while
we are using the job's request and reply pointers to hold
the payload. We will look into it in later patches.
We might need to elaborate the raw upiu api for that
Add support to those uic commands, that are currently supported
by ufshcd api: the variants of dme_{peer}_{set_get}.
At this point better not to add any new api, as careless
uic command may turn the device into a brick.
Signed-off-by: Avri Altman
---
drivers/scsi/ufs/ufs_bsg.c | 56
Do that in order to re-use its code if the task request and response
UPIUs are given externally.
Signed-off-by: Avri Altman
---
drivers/scsi/ufs/ufshcd.c | 35 ++-
1 file changed, 26 insertions(+), 9 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/s
Call the Attach/Probe/Remove APIs.
Signed-off-by: Avri Altman
---
drivers/scsi/ufs/ufshcd.c | 7 +++
1 file changed, 7 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3560185..c2ae406 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd
The UFS host software uses a combination of a host register set,
and Transfer Request Descriptors in system memory to communicate
with host controller hardware. In its mmio space, a separate places
are assigned to UTP Transfer Request Descriptor ("utrd") list, and
to UTP Task Management Request Des
A LLD companion for the ufs scsi transport.
For now, just provide an API to instantiate the ufs transport,
allocating and removing ufs-ports.
As we are attaching the transport template to the scsi host
that was already alocated for the ufs hba,
we'll need to pay extra attention on where to call th
Do that in preparation to re-use ufshcd_issue_tm_cmd code.
Signed-off-by: Avri Altman
---
drivers/scsi/ufs/ufshcd.c | 50 +++
1 file changed, 29 insertions(+), 21 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index c2
Here is a proposal to use the scsi transport subsystem to manage
ufs devices.
scsi transport is a framework that allow to send scsi commands to
a non-scsi devices. Still, it is flexible enough to allow
sending non-scsi commands as well. We will use this framework to
manage ufs devices by sending U
Scsi transport is a framework that allow to send scsi commands to
a non-scsi devices. Still, it is flexible enough to allow
sending non-scsi commands as well. We will use this framework to
manage ufs devices by sending UPIU transactions.
In addition to the basic SCSI core objects this transport cl
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