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drm/amdgpu/gfx: add a helper for MQD restore

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The handling is common so extract it to a helper.

Reviewed-by: Jesse Zhang <jesse.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2026-05-19 15:51:53 -04:00
parent c3e8df87af
commit a3cc796501
2 changed files with 25 additions and 0 deletions
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24
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
View File

@ -377,6 +377,30 @@ int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
return 0;
}
void amdgpu_gfx_mqd_reset_restore(struct amdgpu_ring *ring)
{
struct amdgpu_device *adev = ring->adev;
int mqd_idx, mqd_size;
/* restore mqd with the backup copy */
if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE) {
mqd_idx = ring - &adev->gfx.compute_ring[0];
mqd_size = adev->mqds[AMDGPU_HW_IP_COMPUTE].mqd_size;
if (adev->gfx.mec.mqd_backup[mqd_idx])
memcpy_toio(ring->mqd_ptr, adev->gfx.mec.mqd_backup[mqd_idx], mqd_size);
} else if (ring->funcs->type == AMDGPU_RING_TYPE_GFX) {
mqd_size = adev->mqds[AMDGPU_HW_IP_GFX].mqd_size;
mqd_idx = ring - &adev->gfx.gfx_ring[0];
if (adev->gfx.me.mqd_backup[mqd_idx])
memcpy_toio(ring->mqd_ptr, adev->gfx.me.mqd_backup[mqd_idx], mqd_size);
}
/* reset the ring */
ring->wptr = 0;
atomic64_set((atomic64_t *)ring->wptr_cpu_addr, 0);
amdgpu_ring_clear_ring(ring);
}
/* create MQD for each compute/gfx queue */
int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
unsigned int mqd_size, int xcc_id)

1
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
View File

@ -586,6 +586,7 @@ void amdgpu_gfx_kiq_fini(struct amdgpu_device *adev, int xcc_id);
int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
unsigned hpd_size, int xcc_id);
void amdgpu_gfx_mqd_reset_restore(struct amdgpu_ring *ring);
int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
unsigned mqd_size, int xcc_id);
void amdgpu_gfx_mqd_sw_fini(struct amdgpu_device *adev, int xcc_id);