[PATCH 5/7] drm/amdgpu/si: add PCI reset support

[Alex Deucher]

Use generic PCI reset for GPU reset if the user specifies
PCI reset as the reset mechanism.  This should in general
only be used for validation.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/si.c | 37 ++++++++++++++++++++-------------
 1 file changed, 23 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/si.c b/drivers/gpu/drm/amd/amdgpu/si.c
index 668dd6dfe6a3..7cbc2bb03bc6 100644
--- a/drivers/gpu/drm/amd/amdgpu/si.c
+++ b/drivers/gpu/drm/amd/amdgpu/si.c
@@ -1409,17 +1409,6 @@ static int si_gpu_pci_config_reset(struct amdgpu_device *adev)
 	return r;
 }
 
-static int si_asic_reset(struct amdgpu_device *adev)
-{
-	int r;
-
-	dev_info(adev->dev, "PCI CONFIG reset\n");
-
-	r = si_gpu_pci_config_reset(adev);
-
-	return r;
-}
-
 static bool si_asic_supports_baco(struct amdgpu_device *adev)
 {
 	return false;
@@ -1428,14 +1417,34 @@ static bool si_asic_supports_baco(struct amdgpu_device *adev)
 static enum amd_reset_method
 si_asic_reset_method(struct amdgpu_device *adev)
 {
-	if (amdgpu_reset_method != AMD_RESET_METHOD_LEGACY &&
-	    amdgpu_reset_method != -1)
+	if (amdgpu_reset_method == AMD_RESET_METHOD_PCI)
+		return amdgpu_reset_method;
+	else if (amdgpu_reset_method != AMD_RESET_METHOD_LEGACY &&
+		 amdgpu_reset_method != -1)
 		dev_warn(adev->dev, "Specified reset method:%d isn't supported, using AUTO instead.\n",
-				  amdgpu_reset_method);
+			 amdgpu_reset_method);
 
 	return AMD_RESET_METHOD_LEGACY;
 }
 
+static int si_asic_reset(struct amdgpu_device *adev)
+{
+	int r;
+
+	switch (si_asic_reset_method(adev)) {
+	case AMD_RESET_METHOD_PCI:
+		dev_info(adev->dev, "PCI reset\n");
+		r = amdgpu_device_pci_reset(adev);
+		break;
+	default:
+		dev_info(adev->dev, "PCI CONFIG reset\n");
+		r = si_gpu_pci_config_reset(adev);
+		break;
+	}
+
+	return r;
+}
+
 static u32 si_get_config_memsize(struct amdgpu_device *adev)
 {
 	return RREG32(mmCONFIG_MEMSIZE);
-- 
2.29.2