[PATCH v3 11/12] drm/amdgpu: Register IOMMU topology notifier per device.
Andrey Grodzovsky
andrey.grodzovsky at amd.com
Sat Nov 21 05:21:21 UTC 2020
Handle all DMA IOMMU gropup related dependencies before the
group is removed.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 5 ++++
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 46 ++++++++++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 10 +++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 2 ++
6 files changed, 65 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6243f6d..c41957e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -51,6 +51,7 @@
#include <linux/dma-fence.h>
#include <linux/pci.h>
#include <linux/aer.h>
+#include <linux/notifier.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
@@ -1044,6 +1045,10 @@ struct amdgpu_device {
bool in_pci_err_recovery;
struct pci_saved_state *pci_state;
+
+ struct notifier_block nb;
+ struct blocking_notifier_head notifier;
+ struct list_head device_bo_list;
};
static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 96368a8..bc84c20 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -70,6 +70,8 @@
#include <drm/task_barrier.h>
#include <linux/pm_runtime.h>
+#include <linux/iommu.h>
+
MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/vega12_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");
@@ -3179,6 +3181,39 @@ static const struct attribute *amdgpu_dev_attributes[] = {
};
+static int amdgpu_iommu_group_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, nb);
+ struct amdgpu_bo *bo = NULL;
+
+ /*
+ * Following is a set of IOMMU group dependencies taken care of before
+ * device's IOMMU group is removed
+ */
+ if (action == IOMMU_GROUP_NOTIFY_DEL_DEVICE) {
+
+ spin_lock(&ttm_bo_glob.lru_lock);
+ list_for_each_entry(bo, &adev->device_bo_list, bo) {
+ if (bo->tbo.ttm)
+ ttm_tt_unpopulate(bo->tbo.ttm);
+ }
+ spin_unlock(&ttm_bo_glob.lru_lock);
+
+ if (adev->irq.ih.use_bus_addr)
+ amdgpu_ih_ring_fini(adev, &adev->irq.ih);
+ if (adev->irq.ih1.use_bus_addr)
+ amdgpu_ih_ring_fini(adev, &adev->irq.ih1);
+ if (adev->irq.ih2.use_bus_addr)
+ amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
+
+ amdgpu_gart_dummy_page_fini(adev);
+ }
+
+ return NOTIFY_OK;
+}
+
+
/**
* amdgpu_device_init - initialize the driver
*
@@ -3283,6 +3318,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
INIT_WORK(&adev->xgmi_reset_work, amdgpu_device_xgmi_reset_func);
+ INIT_LIST_HEAD(&adev->device_bo_list);
+
adev->gfx.gfx_off_req_count = 1;
adev->pm.ac_power = power_supply_is_system_supplied() > 0;
@@ -3553,6 +3590,15 @@ int amdgpu_device_init(struct amdgpu_device *adev,
if (amdgpu_device_cache_pci_state(adev->pdev))
pci_restore_state(pdev);
+ BLOCKING_INIT_NOTIFIER_HEAD(&adev->notifier);
+ adev->nb.notifier_call = amdgpu_iommu_group_notifier;
+
+ if (adev->dev->iommu_group) {
+ r = iommu_group_register_notifier(adev->dev->iommu_group, &adev->nb);
+ if (r)
+ goto failed;
+ }
+
return 0;
failed:
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
index e01e681..34c17bd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
@@ -92,7 +92,7 @@ static int amdgpu_gart_dummy_page_init(struct amdgpu_device *adev)
*
* Frees the dummy page used by the driver (all asics).
*/
-static void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev)
+void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev)
{
if (!adev->dummy_page_addr)
return;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
index afa2e28..5678d9c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
@@ -61,6 +61,7 @@ int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev);
void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev);
int amdgpu_gart_init(struct amdgpu_device *adev);
void amdgpu_gart_fini(struct amdgpu_device *adev);
+void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev);
int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
int pages);
int amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index b191701..731c9889 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -94,6 +94,10 @@ static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
}
amdgpu_bo_unref(&bo->parent);
+ spin_lock(&ttm_bo_glob.lru_lock);
+ list_del(&bo->bo);
+ spin_unlock(&ttm_bo_glob.lru_lock);
+
kfree(bo->metadata);
kfree(bo);
}
@@ -616,6 +620,12 @@ static int amdgpu_bo_do_create(struct amdgpu_device *adev,
if (bp->type == ttm_bo_type_device)
bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
+ INIT_LIST_HEAD(&bo->bo);
+
+ spin_lock(&ttm_bo_glob.lru_lock);
+ list_add_tail(&bo->bo, &adev->device_bo_list);
+ spin_unlock(&ttm_bo_glob.lru_lock);
+
return 0;
fail_unreserve:
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 621c0bf..b53b7e0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -112,6 +112,8 @@ struct amdgpu_bo {
struct list_head shadow_list;
struct kgd_mem *kfd_bo;
+
+ struct list_head bo;
};
static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
--
2.7.4
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