Query rlc indirect register access approach specified
by sriov host driver per ip blocks
Signed-off-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Reviewed-by: Zhou, Peng Ju <PengJu.Zhou@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 35 ++++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 8 ++++++
2 files changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 07bc0f504713..a40e4fcdfa46 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -820,3 +820,38 @@ void amdgpu_virt_update_sriov_video_codec(struct amdgpu_device *adev,
}
}
}
+
+bool amdgpu_virt_get_rlcg_reg_access_flag(struct amdgpu_device *adev, u32 acc_flags,
+ u32 hwip, bool write, u32 *rlcg_flag)
+{
+ bool ret = false;
+
+ switch (hwip) {
+ case GC_HWIP:
+ if (amdgpu_sriov_reg_indirect_gc(adev)) {
+ *rlcg_flag =
+ write ? AMDGPU_RLCG_GC_WRITE : AMDGPU_RLCG_GC_READ;
+ ret = true;
+ /* only in new version, AMDGPU_REGS_NO_KIQ and
+ * AMDGPU_REGS_RLC are enabled simultaneously */
+ } else if ((acc_flags & AMDGPU_REGS_RLC) &&
+ !(acc_flags & AMDGPU_REGS_NO_KIQ)) {
+ *rlcg_flag = AMDGPU_RLCG_GC_WRITE_LEGACY;
+ ret = true;
+ }
+ break;
+ case MMHUB_HWIP:
+ if (amdgpu_sriov_reg_indirect_mmhub(adev) &&
+ (acc_flags & AMDGPU_REGS_RLC) && write) {
+ *rlcg_flag = AMDGPU_RLCG_MMHUB_WRITE;
+ ret = true;
+ }
+ break;
+ default:
+ dev_err(adev->dev,
+ "indirect registers access through rlcg is not supported\n");
+ ret = false;
+ break;
+ }
+ return ret;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index 9adfb8d63280..404a06e57f30 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -32,6 +32,12 @@
#define AMDGPU_PASSTHROUGH_MODE (1 << 3) /* thw whole GPU is pass through for VM */
#define AMDGPU_SRIOV_CAPS_RUNTIME (1 << 4) /* is out of full access mode */
+/* flags for indirect register access path supported by rlcg for sriov */
+#define AMDGPU_RLCG_GC_WRITE_LEGACY (0x8 << 28)
+#define AMDGPU_RLCG_GC_WRITE (0x0 << 28)
+#define AMDGPU_RLCG_GC_READ (0x1 << 28)
+#define AMDGPU_RLCG_MMHUB_WRITE (0x2 << 28)
+
/* all asic after AI use this offset */
#define mmRCC_IOV_FUNC_IDENTIFIER 0xDE5
/* tonga/fiji use this offset */
@@ -321,4 +327,6 @@ enum amdgpu_sriov_vf_mode amdgpu_virt_get_sriov_vf_mode(struct amdgpu_device *ad
void amdgpu_virt_update_sriov_video_codec(struct amdgpu_device *adev,
struct amdgpu_video_codec_info *encode, uint32_t encode_array_size,
struct amdgpu_video_codec_info *decode, uint32_t decode_array_size);
+bool amdgpu_virt_get_rlcg_reg_access_flag(struct amdgpu_device *adev, u32 acc_flags,
+ u32 hwip, bool write, u32 *rlcg_flag);
#endif
--
2.17.1
