Use the UNMAP_QUEUES packet to have the KIQ properly
disable them.
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 51 +++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 0460c3f..9ab0485 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -4697,6 +4697,56 @@ static int gfx_v8_0_kiq_kcq_enable(struct amdgpu_device *adev)
return r;
}
+static int gfx_v8_0_kiq_kcq_disable(struct amdgpu_device *adev)
+{
+ struct amdgpu_ring *kiq_ring = &adev->gfx.kiq.ring;
+ 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, 6 + 3);
+ 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,
+ PACKET3_UNMAP_QUEUES_ACTION(1)| /* RESET_QUEUES */
+ PACKET3_UNMAP_QUEUES_QUEUE_SEL(2)); /* select all queues */
+ amdgpu_ring_write(kiq_ring, 0);
+ 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 enable failed (scratch(0x%04X)=0x%08X)\n",
+ scratch, tmp);
+ r = -EINVAL;
+ }
+ amdgpu_gfx_scratch_free(adev, scratch);
+
+ return r;
+}
+
static int gfx_v8_0_mqd_init(struct amdgpu_ring *ring)
{
struct amdgpu_device *adev = ring->adev;
@@ -5131,6 +5181,7 @@ static int gfx_v8_0_hw_fini(void *handle)
pr_debug("For SRIOV client, shouldn't do anything.\n");
return 0;
}
+ gfx_v8_0_kiq_kcq_disable(adev);
gfx_v8_0_cp_enable(adev, false);
gfx_v8_0_rlc_stop(adev);
--
2.5.5
