drm/amdgpu: Enable chained IB MCBP support

Support for MCBP/Virtualization in combination with chained IBs is
formal released on firmware feature version #46. So enable it
according to firmware feature version, otherwise, world switch will
hang.

Signed-off-by: Trigger Huang <trigger.huang@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index ffe3ac2..b92d5f1 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -941,12 +941,6 @@ static int gfx_v8_0_init_microcode(struct amdgpu_device *adev)
        cp_hdr = (const struct gfx_firmware_header_v1_0 *)adev->gfx.me_fw->data;
        adev->gfx.me_fw_version = le32_to_cpu(cp_hdr->header.ucode_version);
 
-       /* chain ib ucode isn't formal released, just disable it by far
-        * TODO: when ucod ready we should use ucode version to judge if
-        * chain-ib support or not.
-        */
-       adev->virt.chained_ib_support = false;
-
        adev->gfx.me_feature_version = le32_to_cpu(cp_hdr->ucode_feature_version);
 
        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_ce.bin", chip_name);
@@ -960,6 +954,17 @@ static int gfx_v8_0_init_microcode(struct amdgpu_device *adev)
        adev->gfx.ce_fw_version = le32_to_cpu(cp_hdr->header.ucode_version);
        adev->gfx.ce_feature_version = le32_to_cpu(cp_hdr->ucode_feature_version);
 
+       /*
+        * Support for MCBP/Virtualization in combination with chained IBs is
+        * formal released on feature version #46
+        */
+       if (adev->gfx.ce_feature_version >= 46 &&
+           adev->gfx.pfp_feature_version >= 46) {
+               adev->virt.chained_ib_support = true;
+               DRM_INFO("Chained IB support enabled!\n");
+       } else
+               adev->virt.chained_ib_support = false;
+
        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_rlc.bin", chip_name);
        err = request_firmware(&adev->gfx.rlc_fw, fw_name, adev->dev);
        if (err)