drm/amdgpu:unmap KCQ in gfx hw_fini(v2)

v2:
move kcq_disable out of SRIOV, make it genearal

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

1 files changed, 57 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 0c4a3b8e8596..dfc10b1baea0 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -5034,12 +5034,69 @@ static int gfx_v8_0_hw_init(void *handle)
         return r;
 }
 
+static int gfx_v8_0_kcq_disable(struct amdgpu_ring *kiq_ring,struct amdgpu_ring *ring)
+{
+        struct amdgpu_device *adev = kiq_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(kiq_ring, 10);
+        if (r) {
+                DRM_ERROR("Failed to lock KIQ (%d).\n", r);
+                amdgpu_gfx_scratch_free(adev, scratch);
+                return r;
+        }
+
+        /* unmap queues */
+        amdgpu_ring_write(kiq_ring, PACKET3(PACKET3_UNMAP_QUEUES, 4));
+        amdgpu_ring_write(kiq_ring, /* Q_sel: 0, vmid: 0, engine: 0, num_Q: 1 */
+                                                PACKET3_UNMAP_QUEUES_ACTION(1) | /* RESET_QUEUES */
+                                                PACKET3_UNMAP_QUEUES_QUEUE_SEL(0) |
+                                                PACKET3_UNMAP_QUEUES_ENGINE_SEL(0) |
+                                                PACKET3_UNMAP_QUEUES_NUM_QUEUES(1));
+        amdgpu_ring_write(kiq_ring, PACKET3_UNMAP_QUEUES_DOORBELL_OFFSET0(ring->doorbell_index));
+        amdgpu_ring_write(kiq_ring, 0);
+        amdgpu_ring_write(kiq_ring, 0);
+        amdgpu_ring_write(kiq_ring, 0);
+        /* 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);
+
+        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 disabled failed (scratch(0x%04X)=0x%08X)\n", scratch, tmp);
+                r = -EINVAL;
+        }
+        amdgpu_gfx_scratch_free(adev, scratch);
+        return r;
+}
+
 static int gfx_v8_0_hw_fini(void *handle)
 {
         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+        int i;
 
         amdgpu_irq_put(adev, &adev->gfx.priv_reg_irq, 0);
         amdgpu_irq_put(adev, &adev->gfx.priv_inst_irq, 0);
+
+        /* disable KCQ to avoid CPC touch memory not valid anymore */
+        for (i = 0; i < adev->gfx.num_compute_rings; i++)
+                gfx_v8_0_kcq_disable(&adev->gfx.kiq.ring, &adev->gfx.compute_ring[i]);
+
         if (amdgpu_sriov_vf(adev)) {
                 pr_debug("For SRIOV client, shouldn't do anything.\n");
                 return 0;