drm/amdgpu add ce_ram_size for interface query

Add a query for the CE ram size.  User mode drivers
will want to use this to determine how much size
of the cache on the CE.

Signed-off-by: Ken Wang <Qingqing.Wang@amd.com>
Reviewd-by: Jammy Zhou <Jammy.Zhou@amd.com>

5 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 4300e3d4b1cd..6c99b7560a27 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1136,6 +1136,8 @@ struct amdgpu_gfx {
         uint32_t gfx_current_status;
         /* sync signal for const engine */
         unsigned ce_sync_offs;
+        /* ce ram size*/
+        unsigned ce_ram_size;
 };
 
 int amdgpu_ib_get(struct amdgpu_ring *ring, struct amdgpu_vm *vm,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 3c182b6c5a27..9ede2446dcd6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -441,6 +441,7 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
                 amdgpu_asic_get_cu_info(adev, &cu_info);
                 dev_info.cu_active_number = cu_info.number;
                 dev_info.cu_ao_mask = cu_info.ao_cu_mask;
+                dev_info.ce_ram_size = adev->gfx.ce_ram_size;
                 memcpy(&dev_info.cu_bitmap[0], &cu_info.bitmap[0], sizeof(cu_info.bitmap));
 
                 return copy_to_user(out, &dev_info,
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
index ed2f35de1d4f..faa39b38f0f3 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
@@ -4820,6 +4820,8 @@ static int gfx_v7_0_hw_init(void *handle)
         if (r)
                 return r;
 
+        adev->gfx.ce_ram_size = 0x8000;
+
         return r;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index ffdba1965029..1895de433446 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -895,6 +895,8 @@ static int gfx_v8_0_sw_init(void *handle)
         if (r)
                 return r;
 
+        adev->gfx.ce_ram_size = 0x8000;
+
         return 0;
 }
 
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 420c762f2ed7..e24cc2e318df 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -573,6 +573,8 @@ struct drm_amdgpu_info_device {
         /** Page table entry - fragment size */
         uint32_t pte_fragment_size;
         uint32_t gart_page_size;
+        /** constant engine ram size*/
+        uint32_t ce_ram_size;
 };
 
 struct drm_amdgpu_info_hw_ip {