drm/amdgpu/gfx9: wait for completion in KIQ init

We need to make sure the various init sequences submitted
to KIQ complete before testing the rings.

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

1 files changed, 79 insertions, 10 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index c95886d2f163..711aaaca6f4b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -1833,9 +1833,26 @@ static void gfx_v9_0_kiq_setting(struct amdgpu_ring *ring)
         WREG32_SOC15(GC, 0, mmRLC_CP_SCHEDULERS, tmp);
 }
 
-static void gfx_v9_0_kiq_enable(struct amdgpu_ring *ring)
+static int gfx_v9_0_kiq_enable(struct amdgpu_ring *ring)
 {
-        amdgpu_ring_alloc(ring, 8);
+        struct amdgpu_device *adev = ring->adev;
+        uint32_t scratch, tmp = 0;
+        int r, i;
+
+        r = amdgpu_gfx_scratch_get(adev, &scratch);
+        if (r) {
+                DRM_ERROR("Failed to get scratch reg (%d).\n", r);
+                return r;
+        }
+        WREG32(scratch, 0xCAFEDEAD);
+
+        r = amdgpu_ring_alloc(ring, 8);
+        if (r) {
+                DRM_ERROR("Failed to lock KIQ (%d).\n", r);
+                amdgpu_gfx_scratch_free(adev, scratch);
+                return r;
+        }
+        amdgpu_ring_alloc(ring, 11);
         /* set resources */
         amdgpu_ring_write(ring, PACKET3(PACKET3_SET_RESOURCES, 6));
         amdgpu_ring_write(ring, PACKET3_SET_RESOURCES_VMID_MASK(0) |
@@ -1846,19 +1863,52 @@ static void gfx_v9_0_kiq_enable(struct amdgpu_ring *ring)
         amdgpu_ring_write(ring, 0);     /* gws mask hi */
         amdgpu_ring_write(ring, 0);     /* oac mask */
         amdgpu_ring_write(ring, 0);     /* gds heap base:0, gds heap size:0 */
+        /* write to scratch for completion */
+        amdgpu_ring_write(ring, PACKET3(PACKET3_SET_UCONFIG_REG, 1));
+        amdgpu_ring_write(ring, (scratch - PACKET3_SET_UCONFIG_REG_START));
+        amdgpu_ring_write(ring, 0xDEADBEEF);
         amdgpu_ring_commit(ring);
-        udelay(50);
+
+        for (i = 0; i < adev->usec_timeout; i++) {
+                tmp = RREG32(scratch);
+                if (tmp == 0xDEADBEEF)
+                        break;
+                DRM_UDELAY(1);
+        }
+        if (i >= adev->usec_timeout) {
+                DRM_ERROR("KIQ enable failed (scratch(0x%04X)=0x%08X)\n",
+                          scratch, tmp);
+                r = -EINVAL;
+        }
+        amdgpu_gfx_scratch_free(adev, scratch);
+
+        return r;
 }
 
-static void gfx_v9_0_map_queue_enable(struct amdgpu_ring *kiq_ring,
-                                   struct amdgpu_ring *ring)
+static int gfx_v9_0_map_queue_enable(struct amdgpu_ring *kiq_ring,
+                                     struct amdgpu_ring *ring)
 {
         struct amdgpu_device *adev = kiq_ring->adev;
         uint64_t mqd_addr, wptr_addr;
+        uint32_t scratch, tmp = 0;
+        int r, i;
+
+        r = amdgpu_gfx_scratch_get(adev, &scratch);
+        if (r) {
+                DRM_ERROR("Failed to get scratch reg (%d).\n", r);
+                return r;
+        }
+        WREG32(scratch, 0xCAFEDEAD);
+
+        r = amdgpu_ring_alloc(kiq_ring, 10);
+        if (r) {
+                DRM_ERROR("Failed to lock KIQ (%d).\n", r);
+                amdgpu_gfx_scratch_free(adev, scratch);
+                return r;
+        }
 
         mqd_addr = amdgpu_bo_gpu_offset(ring->mqd_obj);
         wptr_addr = adev->wb.gpu_addr + (ring->wptr_offs * 4);
-        amdgpu_ring_alloc(kiq_ring, 8);
 
         amdgpu_ring_write(kiq_ring, PACKET3(PACKET3_MAP_QUEUES, 5));
         /* Q_sel:0, vmid:0, vidmem: 1, engine:0, num_Q:1*/
@@ -1877,8 +1927,26 @@ static void gfx_v9_0_map_queue_enable(struct amdgpu_ring *kiq_ring,
         amdgpu_ring_write(kiq_ring, upper_32_bits(mqd_addr));
         amdgpu_ring_write(kiq_ring, lower_32_bits(wptr_addr));
         amdgpu_ring_write(kiq_ring, upper_32_bits(wptr_addr));
+        /* write to scratch for completion */
+        amdgpu_ring_write(kiq_ring, PACKET3(PACKET3_SET_UCONFIG_REG, 1));
+        amdgpu_ring_write(kiq_ring, (scratch - PACKET3_SET_UCONFIG_REG_START));
+        amdgpu_ring_write(kiq_ring, 0xDEADBEEF);
         amdgpu_ring_commit(kiq_ring);
-        udelay(50);
+
+        for (i = 0; i < adev->usec_timeout; i++) {
+                tmp = RREG32(scratch);
+                if (tmp == 0xDEADBEEF)
+                        break;
+                DRM_UDELAY(1);
+        }
+        if (i >= adev->usec_timeout) {
+                DRM_ERROR("KCQ enable failed (scratch(0x%04X)=0x%08X)\n",
+                          scratch, tmp);
+                r = -EINVAL;
+        }
+        amdgpu_gfx_scratch_free(adev, scratch);
+
+        return r;
 }
 
 static int gfx_v9_0_mqd_init(struct amdgpu_ring *ring)
@@ -2124,6 +2192,7 @@ static int gfx_v9_0_kiq_init_queue(struct amdgpu_ring *ring)
         struct v9_mqd *mqd = ring->mqd_ptr;
         bool is_kiq = (ring->funcs->type == AMDGPU_RING_TYPE_KIQ);
         int mqd_idx = AMDGPU_MAX_COMPUTE_RINGS;
+        int r;
 
         if (is_kiq) {
                 gfx_v9_0_kiq_setting(&kiq->ring);
@@ -2162,11 +2231,11 @@ static int gfx_v9_0_kiq_init_queue(struct amdgpu_ring *ring)
         }
 
         if (is_kiq)
-                gfx_v9_0_kiq_enable(ring);
+                r = gfx_v9_0_kiq_enable(ring);
         else
-                gfx_v9_0_map_queue_enable(&kiq->ring, ring);
+                r = gfx_v9_0_map_queue_enable(&kiq->ring, ring);
 
-        return 0;
+        return r;
 }
 
 static int gfx_v9_0_kiq_resume(struct amdgpu_device *adev)