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From 2191c4ea3c45993457baeff031477623ccf1f97e Mon Sep 17 00:00:00 2001
From: Rex Zhu <Rex.Zhu@amd.com>
Date: Wed, 31 Oct 2018 19:49:27 +0800
Subject: [PATCH 0747/2940] drm/amdgpu: Add helper function to get sdma index
Get the sdma index from ring
v2: refine function name
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Flora Cui <flora.cui@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 16 ++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h | 2 +-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
index 0fb9907494bb..9464906c409a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
@@ -40,3 +40,19 @@ struct amdgpu_sdma_instance * amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
return NULL;
}
+
+int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index)
+{
+ struct amdgpu_device *adev = ring->adev;
+ int i;
+
+ for (i = 0; i < adev->sdma.num_instances; i++) {
+ if (ring == &adev->sdma.instance[i].ring ||
+ ring == &adev->sdma.instance[i].page) {
+ *index = i;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
index 479a2459e558..79e89e3bebc4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
@@ -95,5 +95,5 @@ struct amdgpu_buffer_funcs {
struct amdgpu_sdma_instance *
amdgpu_get_sdma_instance(struct amdgpu_ring *ring);
-
+int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index);
#endif
--
2.17.1
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