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drm/amdkfd: Update get_wave_state() for GFX10

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Given control stack is now in the userspace context save restore area
on GFX10, the same as GFX8, it is not needed to copy it back to userspace.

Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yong Zhao 2019-11-08 22:54:07 -05:00 committed by Alex Deucher
parent 4d428e912b
commit 681a9167dd
1 changed files with 9 additions and 5 deletions
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14
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
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@ -251,18 +251,22 @@ static int get_wave_state(struct mqd_manager *mm, void *mqd,
{
struct v10_compute_mqd *m;
/* Control stack is located one page after MQD. */
void *mqd_ctl_stack = (void *)((uintptr_t)mqd + PAGE_SIZE);
m = get_mqd(mqd);
/* Control stack is written backwards, while workgroup context data
* is written forwards. Both starts from m->cp_hqd_cntl_stack_size.
* Current position is at m->cp_hqd_cntl_stack_offset and
* m->cp_hqd_wg_state_offset, respectively.
*/
*ctl_stack_used_size = m->cp_hqd_cntl_stack_size -
m->cp_hqd_cntl_stack_offset;
*save_area_used_size = m->cp_hqd_wg_state_offset -
m->cp_hqd_cntl_stack_size;
if (copy_to_user(ctl_stack, mqd_ctl_stack, m->cp_hqd_cntl_stack_size))
return -EFAULT;
/* Control stack is not copied to user mode for GFXv10 because
* it's part of the context save area that is already
* accessible to user mode
*/
return 0;
}