From: Jiadong Zhu <Jiadong.Zhu@xxxxxxx>
There is a racing condition that cp firmware modifies
MQD in reset sequence after driver updates it for
remapping. We have to wait till CP_HQD_ACTIVE becoming
false then remap the queue.
v2: fix KIQ locking (Alex)
Signed-off-by: Jiadong Zhu <Jiadong.Zhu@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c | 37 +++++++++++++++++++++----
1 file changed, 31 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
index 394790d00385..717320d92e68 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
@@ -3270,7 +3270,7 @@ static int gfx_v9_4_3_reset_kcq(struct amdgpu_ring *ring,
struct amdgpu_kiq *kiq = &adev->gfx.kiq[ring->xcc_id];
struct amdgpu_ring *kiq_ring = &kiq->ring;
unsigned long flags;
- int r;
+ int r, i;
if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
return -EINVAL;
@@ -3292,9 +3292,28 @@ static int gfx_v9_4_3_reset_kcq(struct amdgpu_ring *ring,
if (r)
return r;
+ /* make sure dequeue is complete*/
+ gfx_v9_4_3_xcc_set_safe_mode(adev, ring->xcc_id);
+ mutex_lock(&adev->srbm_mutex);
+ soc15_grbm_select(adev, ring->me, ring->pipe, ring->queue, 0, GET_INST(GC, ring->xcc_id));
+ for (i = 0; i < adev->usec_timeout; i++) {
+ if (!(RREG32_SOC15(GC, 0, regCP_HQD_ACTIVE) & 1))
+ break;
+ udelay(1);
+ }
+ if (i >= adev->usec_timeout)
+ r = -ETIMEDOUT;
+ soc15_grbm_select(adev, 0, 0, 0, 0, GET_INST(GC, ring->xcc_id));
+ mutex_unlock(&adev->srbm_mutex);
+ gfx_v9_4_3_xcc_unset_safe_mode(adev, ring->xcc_id);
+ if (r) {
+ dev_err(adev->dev, "fail to wait on hqd deactive\n");
+ return r;
+ }
+
r = amdgpu_bo_reserve(ring->mqd_obj, false);
if (unlikely(r != 0)){
- DRM_ERROR("fail to resv mqd_obj\n");
+ dev_err(adev->dev, "fail to resv mqd_obj\n");
return r;
}
r = amdgpu_bo_kmap(ring->mqd_obj, (void **)&ring->mqd_ptr);
@@ -3304,15 +3323,21 @@ static int gfx_v9_4_3_reset_kcq(struct amdgpu_ring *ring,
ring->mqd_ptr = NULL;
}
amdgpu_bo_unreserve(ring->mqd_obj);
- if (r){
- DRM_ERROR("fail to unresv mqd_obj\n");
+ if (r) {
+ dev_err(adev->dev, "fail to unresv mqd_obj\n");
return r;
}
+ spin_lock_irqsave(&kiq->ring_lock, flags);
r = amdgpu_ring_alloc(kiq_ring, kiq->pmf->map_queues_size);
+ if (r) {
+ spin_unlock_irqrestore(&kiq->ring_lock, flags);
+ return -ENOMEM;
+ }
kiq->pmf->kiq_map_queues(kiq_ring, ring);
r = amdgpu_ring_test_ring(kiq_ring);
- if (r){
- DRM_ERROR("fail to remap queue\n");
+ spin_unlock_irqrestore(&kiq->ring_lock, flags);
+ if (r) {
+ dev_err(adev->dev, "fail to remap queue\n");
return r;
}
return amdgpu_ring_test_ring(ring);
--
2.45.2
