drm/amdgpu: equip new req_init_data handshake

by this new handshake host side can prepare vbios/ip-discovery
and pf&vf exchange data upon recieving this request without
stopping world switch.

this way the world switch is less impacted by VF's exclusive mode
request

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Emily Deng <Emily.Deng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index f88fe7f..8d39ed4 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1798,6 +1798,21 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
        amdgpu_amdkfd_device_probe(adev);
 
        if (amdgpu_sriov_vf(adev)) {
+               /* handle vbios stuff prior full access mode for new handshake */
+               if (adev->virt.req_init_data_ver == 1) {
+                       if (!amdgpu_get_bios(adev)) {
+                               DRM_ERROR("failed to get vbios\n");
+                               return -EINVAL;
+                       }
+
+                       r = amdgpu_atombios_init(adev);
+                       if (r) {
+                               dev_err(adev->dev, "amdgpu_atombios_init failed\n");
+                               amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_ATOMBIOS_INIT_FAIL, 0, 0);
+                               return r;
+                       }
+               }
+
                r = amdgpu_virt_request_full_gpu(adev, true);
                if (r)
                        return -EAGAIN;
@@ -1830,6 +1845,10 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
                }
                /* get the vbios after the asic_funcs are set up */
                if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON) {
+                       /* skip vbios handling for new handshake */
+                       if (amdgpu_sriov_vf(adev) && adev->virt.req_init_data_ver == 1)
+                               continue;
+
                        /* Read BIOS */
                        if (!amdgpu_get_bios(adev))
                                return -EINVAL;

diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index a67d78d..7768880 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -457,16 +457,19 @@ int nv_set_ip_blocks(struct amdgpu_device *adev)
 {
        int r;
 
-       /* Set IP register base before any HW register access */
-       r = nv_reg_base_init(adev);
-       if (r)
-               return r;
-
        adev->nbio.funcs = &nbio_v2_3_funcs;
        adev->nbio.hdp_flush_reg = &nbio_v2_3_hdp_flush_reg;
 
-       if (amdgpu_sriov_vf(adev))
+       if (amdgpu_sriov_vf(adev)) {
                adev->virt.ops = &xgpu_nv_virt_ops;
+               /* try send GPU_INIT_DATA request to host */
+               amdgpu_virt_request_init_data(adev);
+       }
+
+       /* Set IP register base before any HW register access */
+       r = nv_reg_base_init(adev);
+       if (r)
+               return r;
 
        switch (adev->asic_type) {
        case CHIP_NAVI10: