[PATCH V2 2/5] drm/amdkfd: disable IOMMUv2 support for KV/CZ

[Alex Deucher <alexander.deucher@amd.com>]

Use the dGPU path instead.  There were a lot of platform
issues with IOMMU in general on these chips due to windows
not enabling IOMMU at the time.  The dGPU path has been
used for a long time with newer APUs and works fine.  This
also paves the way to simplify the driver significantly.

v2: use the dGPU queue manager functions

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device.c               | 6 ------
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 8 +-------
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index 4827aa72dc748..44d87e04677b4 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -234,10 +234,6 @@ static void kfd_device_info_init(struct kfd_dev *kfd,
 		    asic_type != CHIP_TONGA)
 			kfd->device_info.supports_cwsr = true;
 
-		if (asic_type == CHIP_KAVERI ||
-		    asic_type == CHIP_CARRIZO)
-			kfd->device_info.needs_iommu_device = true;
-
 		if (asic_type != CHIP_HAWAII && !vf)
 			kfd->device_info.needs_pci_atomics = true;
 	}
@@ -250,7 +246,6 @@ struct kfd_dev *kgd2kfd_probe(struct amdgpu_device *adev, bool vf)
 	uint32_t gfx_target_version = 0;
 
 	switch (adev->asic_type) {
-#ifdef KFD_SUPPORT_IOMMU_V2
 #ifdef CONFIG_DRM_AMDGPU_CIK
 	case CHIP_KAVERI:
 		gfx_target_version = 70000;
@@ -263,7 +258,6 @@ struct kfd_dev *kgd2kfd_probe(struct amdgpu_device *adev, bool vf)
 		if (!vf)
 			f2g = &gfx_v8_kfd2kgd;
 		break;
-#endif
 #ifdef CONFIG_DRM_AMDGPU_CIK
 	case CHIP_HAWAII:
 		gfx_target_version = 70001;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 05909c366504c..53b83ffe72158 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -2558,18 +2558,12 @@ struct device_queue_manager *device_queue_manager_init(struct kfd_node *dev)
 	}
 
 	switch (dev->adev->asic_type) {
-	case CHIP_CARRIZO:
-		device_queue_manager_init_vi(&dqm->asic_ops);
-		break;
-
 	case CHIP_KAVERI:
-		device_queue_manager_init_cik(&dqm->asic_ops);
-		break;
-
 	case CHIP_HAWAII:
 		device_queue_manager_init_cik_hawaii(&dqm->asic_ops);
 		break;
 
+	case CHIP_CARRIZO:
 	case CHIP_TONGA:
 	case CHIP_FIJI:
 	case CHIP_POLARIS10:
-- 
2.41.0