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author | 2022-07-15 10:05:14 -0500 | |
---|---|---|
committer | 2022-07-17 17:14:28 -0700 | |
commit | c83dee9b639469b6563a281f39deb99311f16bc4 (patch) | |
tree | 84447a982efeae76ce13a6cb5965c0894ae253ab /drivers/gpu/drm/amd | |
parent | mm/gup: migrate device coherent pages when pinning instead of failing (diff) | |
download | linux-c83dee9b6394.tar.gz linux-c83dee9b6394.tar.bz2 linux-c83dee9b6394.zip |
drm/amdkfd: add SPM support for SVM
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_COHERENT to create the device page
map region.
Also, MIGRATE_VMA_SELECT_DEVICE_COHERENT flag is selected for coherent
type case during migration to device.
Link: https://lkml.kernel.org/r/20220715150521.18165-8-alex.sierra@amd.com
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd')
-rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c index e44376c2ecdc..f73e3e340413 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c @@ -671,13 +671,15 @@ svm_migrate_vma_to_ram(struct amdgpu_device *adev, struct svm_range *prange, migrate.vma = vma; migrate.start = start; migrate.end = end; - migrate.flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; migrate.pgmap_owner = SVM_ADEV_PGMAP_OWNER(adev); + if (adev->gmc.xgmi.connected_to_cpu) + migrate.flags = MIGRATE_VMA_SELECT_DEVICE_COHERENT; + else + migrate.flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; buf = kvcalloc(npages, 2 * sizeof(*migrate.src) + sizeof(uint64_t) + sizeof(dma_addr_t), GFP_KERNEL); - if (!buf) goto out; @@ -947,7 +949,7 @@ int svm_migrate_init(struct amdgpu_device *adev) { struct kfd_dev *kfddev = adev->kfd.dev; struct dev_pagemap *pgmap; - struct resource *res; + struct resource *res = NULL; unsigned long size; void *r; @@ -962,28 +964,34 @@ 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 (IS_ERR(res)) - return -ENOMEM; + if (adev->gmc.xgmi.connected_to_cpu) { + pgmap->range.start = adev->gmc.aper_base; + pgmap->range.end = adev->gmc.aper_base + adev->gmc.aper_size - 1; + pgmap->type = MEMORY_DEVICE_COHERENT; + } else { + res = devm_request_free_mem_region(adev->dev, &iomem_resource, size); + if (IS_ERR(res)) + return -ENOMEM; + pgmap->range.start = res->start; + pgmap->range.end = res->end; + pgmap->type = MEMORY_DEVICE_PRIVATE; + } - pgmap->type = MEMORY_DEVICE_PRIVATE; pgmap->nr_range = 1; - pgmap->range.start = res->start; - pgmap->range.end = res->end; pgmap->ops = &svm_migrate_pgmap_ops; pgmap->owner = SVM_ADEV_PGMAP_OWNER(adev); - pgmap->flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; - + pgmap->flags = 0; /* Device manager releases device-specific resources, memory region and * pgmap when driver disconnects from device. */ r = devm_memremap_pages(adev->dev, pgmap); if (IS_ERR(r)) { pr_err("failed to register HMM device memory\n"); - /* Disable SVM support capability */ pgmap->type = 0; - devm_release_mem_region(adev->dev, res->start, resource_size(res)); + if (pgmap->type == MEMORY_DEVICE_PRIVATE) + devm_release_mem_region(adev->dev, res->start, + res->end - res->start + 1); return PTR_ERR(r); } |