drm/amdgpu: add gfx8 pre soft reset

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 87232397dbd0..62ba7e550aee 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -5111,6 +5111,63 @@ static int gfx_v8_0_check_soft_reset(void *handle)
         return 0;
 }
 
+static void gfx_v8_0_inactive_hqd(struct amdgpu_device *adev,
+                                  struct amdgpu_ring *ring)
+{
+        int i;
+
+        vi_srbm_select(adev, ring->me, ring->pipe, ring->queue, 0);
+        if (RREG32(mmCP_HQD_ACTIVE) & CP_HQD_ACTIVE__ACTIVE_MASK) {
+                u32 tmp;
+                tmp = RREG32(mmCP_HQD_DEQUEUE_REQUEST);
+                tmp = REG_SET_FIELD(tmp, CP_HQD_DEQUEUE_REQUEST,
+                                    DEQUEUE_REQ, 2);
+                WREG32(mmCP_HQD_DEQUEUE_REQUEST, tmp);
+                for (i = 0; i < adev->usec_timeout; i++) {
+                        if (!(RREG32(mmCP_HQD_ACTIVE) & CP_HQD_ACTIVE__ACTIVE_MASK))
+                                break;
+                        udelay(1);
+                }
+        }
+}
+
+static int gfx_v8_0_pre_soft_reset(void *handle)
+{
+        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+        u32 grbm_soft_reset = 0, srbm_soft_reset = 0;
+
+        if (!adev->ip_block_status[AMD_IP_BLOCK_TYPE_GFX].hang)
+                return 0;
+
+        grbm_soft_reset = adev->gfx.grbm_soft_reset;
+        srbm_soft_reset = adev->gfx.srbm_soft_reset;
+
+        /* stop the rlc */
+        gfx_v8_0_rlc_stop(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))
+                /* Disable GFX parsing/prefetching */
+                gfx_v8_0_cp_gfx_enable(adev, false);
+
+        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)) {
+                int i;
+
+                for (i = 0; i < adev->gfx.num_compute_rings; i++) {
+                        struct amdgpu_ring *ring = &adev->gfx.compute_ring[i];
+
+                        gfx_v8_0_inactive_hqd(adev, ring);
+                }
+                /* Disable MEC parsing/prefetching */
+                gfx_v8_0_cp_compute_enable(adev, false);
+        }
+
+       return 0;
+}
+
 static int gfx_v8_0_soft_reset(void *handle)
 {
         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -6357,6 +6414,7 @@ const struct amd_ip_funcs gfx_v8_0_ip_funcs = {
         .is_idle = gfx_v8_0_is_idle,
         .wait_for_idle = gfx_v8_0_wait_for_idle,
         .check_soft_reset = gfx_v8_0_check_soft_reset,
+        .pre_soft_reset = gfx_v8_0_pre_soft_reset,
         .soft_reset = gfx_v8_0_soft_reset,
         .set_clockgating_state = gfx_v8_0_set_clockgating_state,
         .set_powergating_state = gfx_v8_0_set_powergating_state,