This adds support for writing and reading back in a single
oneshot packet. This is needed to send a tlb invalidation
and wait for ack in a single operation.
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 2c618a1be03e..dd98d2e55508 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1171,6 +1171,13 @@ static void sdma_v4_0_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg,
sdma_v4_0_wait_reg_mem(ring, 0, 0, reg, 0, val, mask, 10);
}
+static void sdma_v4_0_ring_emit_reg_write_reg_wait(struct amdgpu_ring *ring,
+ uint32_t reg0, uint32_t reg1,
+ uint32_t ref, uint32_t mask)
+{
+ sdma_v4_0_wait_reg_mem(ring, 0, 1, reg0, reg1, ref, mask, 10);
+}
+
static int sdma_v4_0_early_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -1611,6 +1618,7 @@ static const struct amdgpu_ring_funcs sdma_v4_0_ring_funcs = {
.pad_ib = sdma_v4_0_ring_pad_ib,
.emit_wreg = sdma_v4_0_ring_emit_wreg,
.emit_reg_wait = sdma_v4_0_ring_emit_reg_wait,
+ .emit_reg_write_reg_wait = sdma_v4_0_ring_emit_reg_write_reg_wait,
};
static void sdma_v4_0_set_ring_funcs(struct amdgpu_device *adev)
--
2.13.6
