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| author | Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com> | 2023-10-27 19:43:30 +0300 |
|---|---|---|
| committer | Jeffrey Hugo <quic_jhugo@quicinc.com> | 2023-11-03 18:03:01 +0300 |
| commit | 3b511278b6ef514b3ae3d99ff62947cddd434479 (patch) | |
| tree | 267474940e9fc6d9ea4e63871af9fe250f0d9814 /include/uapi/drm | |
| parent | 44793c6a5b784f1f25608e3773fd40e011c63391 (diff) | |
| download | linux-3b511278b6ef514b3ae3d99ff62947cddd434479.tar.xz | |
accel/qaic: Support for 0 resize slice execution in BO
Add support to partially execute a slice which is resized to zero.
Executing a zero size slice in a BO should mean that there is no DMA
transfers involved but you should still configure doorbell and semaphores.
For example consider a BO of size 18K and it is sliced into 3 6K slices
and user calls partial execute ioctl with resize as 10K.
slice 0 - size is 6k and offset is 0, so resize of 10K will not cut short
this slice hence we send the entire slice for execution.
slice 1 - size is 6k and offset is 6k, so resize of 10K will cut short this
slice and only the first 4k should be DMA along with configuring
doorbell and semaphores.
slice 2 - size is 6k and offset is 12k, so resize of 10k will cut short
this slice and no DMA transfer would be involved but we should
would configure doorbell and semaphores.
This change begs to change the behavior of 0 resize. Currently, 0 resize
partial execute ioctl behaves exactly like execute ioctl i.e. no resize.
After this patch all the slice in BO should behave exactly like slice 2 in
above example.
Refactor copy_partial_exec_reqs() to make it more readable and less
complex.
Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231027164330.11978-1-quic_jhugo@quicinc.com
Diffstat (limited to 'include/uapi/drm')
| -rw-r--r-- | include/uapi/drm/qaic_accel.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/uapi/drm/qaic_accel.h b/include/uapi/drm/qaic_accel.h index 43ac5d864512..9dab32316aee 100644 --- a/include/uapi/drm/qaic_accel.h +++ b/include/uapi/drm/qaic_accel.h @@ -287,8 +287,9 @@ struct qaic_execute_entry { * struct qaic_partial_execute_entry - Defines a BO to resize and submit. * @handle: In. GEM handle of the BO to commit to the device. * @dir: In. Direction of data. 1 = to device, 2 = from device. - * @resize: In. New size of the BO. Must be <= the original BO size. 0 is - * short for no resize. + * @resize: In. New size of the BO. Must be <= the original BO size. + * @resize as 0 would be interpreted as no DMA transfer is + * involved. */ struct qaic_partial_execute_entry { __u32 handle; |