From: Monk Liu <monk....@amd.com>
it is needed for virtualization
Signed-off-by: Monk Liu <monk....@amd.com>
Signed-off-by: Xiangliang Yu <xiangliang...@amd.com>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
Reviewed-by: Christian König <christian.koe...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 2f833ca..6f266d0 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3218,6 +3218,30 @@ static void gfx_v9_ring_emit_cntxcntl(struct amdgpu_ring
*ring, uint32_t flags)
amdgpu_ring_write(ring, 0);
}
+static unsigned gfx_v9_0_ring_emit_init_cond_exec(struct amdgpu_ring *ring)
+{
+ unsigned ret;
+ amdgpu_ring_write(ring, PACKET3(PACKET3_COND_EXEC, 3));
+ amdgpu_ring_write(ring, lower_32_bits(ring->cond_exe_gpu_addr));
+ amdgpu_ring_write(ring, upper_32_bits(ring->cond_exe_gpu_addr));
+ amdgpu_ring_write(ring, 0); /* discard following DWs if
*cond_exec_gpu_addr==0 */
+ ret = ring->wptr;
+ amdgpu_ring_write(ring, 0x55aa55aa); /* patch dummy value later */
+ return ret;
+}
+
+static void gfx_v9_0_ring_emit_patch_cond_exec(struct amdgpu_ring *ring,
unsigned offset)
+{
+ unsigned cur;
+ BUG_ON(ring->ring[offset] != 0x55aa55aa);
+
+ cur = ring->wptr - 1;
+ if (likely(cur > offset))
+ ring->ring[offset] = cur - offset;
+ else
+ ring->ring[offset] = (ring->ring_size>>2) - offset + cur;
+}
+
static void gfx_v9_0_ring_emit_rreg(struct amdgpu_ring *ring, uint32_t reg)
{
struct amdgpu_device *adev = ring->adev;
@@ -3569,6 +3593,8 @@ static const struct amdgpu_ring_funcs
gfx_v9_0_ring_funcs_gfx = {
.pad_ib = amdgpu_ring_generic_pad_ib,
.emit_switch_buffer = gfx_v9_ring_emit_sb,
.emit_cntxcntl = gfx_v9_ring_emit_cntxcntl,
+ .init_cond_exec = gfx_v9_0_ring_emit_init_cond_exec,
+ .patch_cond_exec = gfx_v9_0_ring_emit_patch_cond_exec,
};
static const struct amdgpu_ring_funcs gfx_v9_0_ring_funcs_compute = {
--
2.5.5
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