drm/amdgpu: check if we need to reset at init time (v2)

To deal with situations like kexec or GPU VM passthrough
where the device may have been used previously without a
proper GPU reset between.

v2: rebase

bug: https://bugs.freedesktop.org/show_bug.cgi?id=108585
bug: https://bugs.freedesktop.org/show_bug.cgi?id=108754
Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 1a558dc41ba6..8a61764e64cf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2550,6 +2550,17 @@ int amdgpu_device_init(struct amdgpu_device *adev,
         /* detect if we are with an SRIOV vbios */
         amdgpu_device_detect_sriov_bios(adev);
 
+        /* check if we need to reset the asic
+         *  E.g., driver was not cleanly unloaded previously, etc.
+         */
+        if (amdgpu_asic_need_reset_on_init(adev)) {
+                r = amdgpu_asic_reset(adev);
+                if (r) {
+                        dev_err(adev->dev, "asic reset on init failed\n");
+                        goto failed;
+                }
+        }
+
         /* Post card if necessary */
         if (amdgpu_device_need_post(adev)) {
                 if (!adev->bios) {