From: Alex Sierra <alex.sie...@amd.com>
When CPU is connected throug XGMI, it has coherent
access to VRAM resource. In this case that resource
is taken from a table in the device gmc aperture base.
This resource is used along with the device type, which could
be DEVICE_PRIVATE or DEVICE_GENERIC to create the device
page map region.
Signed-off-by: Alex Sierra <alex.sie...@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 12 +++++++++---
drivers/gpu/drm/amd/amdkfd/kfd_svm.h | 1 -
kernel/resource.c | 2 +-
3 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index c8ca3252cbc2..f5939449a99f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
@@ -895,6 +895,7 @@ int svm_migrate_init(struct amdgpu_device *adev)
struct resource *res;
unsigned long size;
void *r;
+ bool xgmi_connected_to_cpu = adev->gmc.xgmi.connected_to_cpu;
/* Page migration works on Vega10 or newer */
if (kfddev->device_info->asic_family < CHIP_VEGA10)
@@ -907,17 +908,22 @@ int svm_migrate_init(struct amdgpu_device *adev)
* should remove reserved size
*/
size = ALIGN(adev->gmc.real_vram_size, 2ULL << 20);
- res = devm_request_free_mem_region(adev->dev, &iomem_resource, size);
+ if (xgmi_connected_to_cpu)
+ res = lookup_resource(&iomem_resource, adev->gmc.aper_base);
+ else
+ res = devm_request_free_mem_region(adev->dev, &iomem_resource,
size);
+
if (IS_ERR(res))
return -ENOMEM;
- pgmap->type = MEMORY_DEVICE_PRIVATE;
pgmap->nr_range = 1;
pgmap->range.start = res->start;
pgmap->range.end = res->end;
+ pgmap->type = xgmi_connected_to_cpu ?
+ MEMORY_DEVICE_GENERIC : MEMORY_DEVICE_PRIVATE;
pgmap->ops = &svm_migrate_pgmap_ops;
pgmap->owner = SVM_ADEV_PGMAP_OWNER(adev);
- pgmap->flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE;
+ pgmap->flags = 0;
r = devm_memremap_pages(adev->dev, pgmap);
if (IS_ERR(r)) {
pr_err("failed to register HMM device memory\n");
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.h
b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h
index 21f693767a0d..3881a93192ed 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h
@@ -38,7 +38,6 @@
#define SVM_RANGE_VRAM_DOMAIN (1UL << 0)
#define SVM_ADEV_PGMAP_OWNER(adev)\
((adev)->hive ? (void *)(adev)->hive : (void *)(adev))
-
struct svm_range_bo {
struct amdgpu_bo *bo;
struct kref kref;
diff --git a/kernel/resource.c b/kernel/resource.c
index 627e61b0c124..da137553b83e 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -783,7 +783,7 @@ struct resource *lookup_resource(struct resource *root,
resource_size_t start)
return res;
}
-
+EXPORT_SYMBOL(lookup_resource);
/*
* Insert a resource into the resource tree. If successful, return NULL,
* otherwise return the conflicting resource (compare to __request_resource())
--
2.31.1
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