From: Jack Xiao <Jack.Xiao@xxxxxxx>
Allocate CSA for the given sdma ring.
Acked-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Signed-off-by: Jack Xiao <Jack.Xiao@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 27 ++++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h | 2 +-
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
index 115bb0c99b0f..7ddffbf65999 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
@@ -24,6 +24,10 @@
#include "amdgpu.h"
#include "amdgpu_sdma.h"
+#define AMDGPU_CSA_SDMA_SIZE 64
+/* SDMA CSA reside in the 3rd page of CSA */
+#define AMDGPU_CSA_SDMA_OFFSET (4096 * 2)
+
/*
* GPU SDMA IP block helpers function.
*/
@@ -56,3 +60,26 @@ int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index)
return -EINVAL;
}
+
+uint64_t amdgpu_sdma_get_csa_mc_addr(struct amdgpu_ring *ring,
+ unsigned vmid)
+{
+ struct amdgpu_device *adev = ring->adev;
+ uint64_t csa_mc_addr;
+ uint32_t index = 0;
+ int r;
+
+ if (vmid == 0 || !amdgpu_mcbp)
+ return 0;
+
+ r = amdgpu_sdma_get_index_from_ring(ring, &index);
+
+ if (r || index > 31)
+ csa_mc_addr = 0;
+ else
+ csa_mc_addr = amdgpu_csa_vaddr(adev) +
+ AMDGPU_CSA_SDMA_OFFSET +
+ index * AMDGPU_CSA_SDMA_SIZE;
+
+ return csa_mc_addr;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
index 1ba9ba3b54f7..35dd152f9d5c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
@@ -97,5 +97,5 @@ struct amdgpu_buffer_funcs {
struct amdgpu_sdma_instance *
amdgpu_sdma_get_instance_from_ring(struct amdgpu_ring *ring);
int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index);
-
+uint64_t amdgpu_sdma_get_csa_mc_addr(struct amdgpu_ring *ring, unsigned vmid);
#endif
--
2.20.1
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