drm/amdgpu: Change kiq initialize/reset sequence on gfx8

1. initialize kiq before initialize gfx ring.
2. set kiq ring ready immediately when kiq initialize
   successfully.
3. split function gfx_v8_0_kiq_resume into two functions.
   gfx_v8_0_kiq_resume is for kiq initialize.
   gfx_v8_0_kcq_resume is for kcq initialize.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index d5470d4..3882689 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -4622,7 +4622,6 @@ static int gfx_v8_0_kiq_kcq_enable(struct amdgpu_device *adev)
                queue_mask |= (1ull << i);
        }
 
-       kiq_ring->ready = true;
        r = amdgpu_ring_alloc(kiq_ring, (8 * adev->gfx.num_compute_rings) + 8);
        if (r) {
                DRM_ERROR("Failed to lock KIQ (%d).\n", r);
@@ -4949,26 +4948,33 @@ static void gfx_v8_0_set_mec_doorbell_range(struct amdgpu_device *adev)
 
 static int gfx_v8_0_kiq_resume(struct amdgpu_device *adev)
 {
-       struct amdgpu_ring *ring = NULL;
-       int r = 0, i;
-
-       gfx_v8_0_cp_compute_enable(adev, true);
+       struct amdgpu_ring *ring;
+       int r;
 
        ring = &adev->gfx.kiq.ring;
 
        r = amdgpu_bo_reserve(ring->mqd_obj, false);
        if (unlikely(r != 0))
-               goto done;
+               return r;
 
        r = amdgpu_bo_kmap(ring->mqd_obj, &ring->mqd_ptr);
-       if (!r) {
-               r = gfx_v8_0_kiq_init_queue(ring);
-               amdgpu_bo_kunmap(ring->mqd_obj);
-               ring->mqd_ptr = NULL;
-       }
+       if (unlikely(r != 0))
+               return r;
+
+       gfx_v8_0_kiq_init_queue(ring);
+       amdgpu_bo_kunmap(ring->mqd_obj);
+       ring->mqd_ptr = NULL;
        amdgpu_bo_unreserve(ring->mqd_obj);
-       if (r)
-               goto done;
+       ring->ready = true;
+       return 0;
+}
+
+static int gfx_v8_0_kcq_resume(struct amdgpu_device *adev)
+{
+       struct amdgpu_ring *ring = NULL;
+       int r = 0, i;
+
+       gfx_v8_0_cp_compute_enable(adev, true);
 
        for (i = 0; i < adev->gfx.num_compute_rings; i++) {
                ring = &adev->gfx.compute_ring[i];
@@ -5024,14 +5030,17 @@ static int gfx_v8_0_cp_resume(struct amdgpu_device *adev)
                        return r;
        }
 
-       r = gfx_v8_0_cp_gfx_resume(adev);
+       r = gfx_v8_0_kiq_resume(adev);
        if (r)
                return r;
 
-       r = gfx_v8_0_kiq_resume(adev);
+       r = gfx_v8_0_cp_gfx_resume(adev);
        if (r)
                return r;
 
+       r = gfx_v8_0_kcq_resume(adev);
+       if (r)
+               return r;
        gfx_v8_0_enable_gui_idle_interrupt(adev, true);
 
        return 0;
@@ -5334,10 +5343,6 @@ static int gfx_v8_0_post_soft_reset(void *handle)
        srbm_soft_reset = adev->gfx.srbm_soft_reset;
 
        if (REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_CP) ||
-           REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_GFX))
-               gfx_v8_0_cp_gfx_resume(adev);
-
-       if (REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_CP) ||
            REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_CPF) ||
            REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_CPC) ||
            REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_CPG)) {
@@ -5353,7 +5358,13 @@ static int gfx_v8_0_post_soft_reset(void *handle)
                        mutex_unlock(&adev->srbm_mutex);
                }
                gfx_v8_0_kiq_resume(adev);
+               gfx_v8_0_kcq_resume(adev);
        }
+
+       if (REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_CP) ||
+           REG_GET_FIELD(grbm_soft_reset, GRBM_SOFT_RESET, SOFT_RESET_GFX))
+               gfx_v8_0_cp_gfx_resume(adev);
+
        gfx_v8_0_rlc_start(adev);
 
        return 0;