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GET /api/1.1/patches/2180669/?format=api
{ "id": 2180669, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2180669/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260107091823.68974-3-jniethe@nvidia.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.1/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/" }, "msgid": "<20260107091823.68974-3-jniethe@nvidia.com>", "date": "2026-01-07T09:18:14", "name": "[v2,02/11] drm/amdkfd: Use migrate pfns internally", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "485f1875df26273accd3dbe25af5416f3f476928", "submitter": { "id": 92354, "url": "http://patchwork.ozlabs.org/api/1.1/people/92354/?format=api", "name": "Jordan Niethe", "email": "jniethe@nvidia.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260107091823.68974-3-jniethe@nvidia.com/mbox/", "series": [ { "id": 487451, "url": "http://patchwork.ozlabs.org/api/1.1/series/487451/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=487451", "date": "2026-01-07T09:18:12", "name": "Remove device private pages from physical address space", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/487451/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2180669/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2180669/checks/", "tags": {}, "headers": { "Return-Path": "\n <linuxppc-dev+bounces-15365-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": 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c=relaxed/relaxed; d=Nvidia.com;\n s=selector2;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=RiPfsVeSco4+tw9MLR3a6AO8th+OP5bcrFN+x/BIKr4=;\n b=mSgXs/ObBn9EHqPfUmrOVEkF8n5mnEKMiT6dInjMTJxZoFcTd33PkJG35Kt07LmesMOVUJH1G3DlRL8JmEE3gtj3FvLW24kbUuPzvcdRj3s/mkpRBQyzcgKSEcCiRAzrn/YLRbDWmpVd3cISGH5PtrmBNyuVhIvy97XO0uKabDSc+qyOhQHQ7jsDbFk3qMwvOOJjNyR3uA9vKkHY1S4JdHf4m9lEeCROdYx3ADukcKGqb7G/ZSQvbZG2WPCse+5IyRxFFkAOiK0RYc5J4OGh3Pu1aGbDlN9AktnVPfvU7sYsSw74pO3E5Vy88fPYOZ4hZ2EjwGrlvwv51+18bZWTWg==", "From": "Jordan Niethe <jniethe@nvidia.com>", "To": "linux-mm@kvack.org", "Cc": "balbirs@nvidia.com,\n\tmatthew.brost@intel.com,\n\takpm@linux-foundation.org,\n\tlinux-kernel@vger.kernel.org,\n\tdri-devel@lists.freedesktop.org,\n\tdavid@redhat.com,\n\tziy@nvidia.com,\n\tapopple@nvidia.com,\n\tlorenzo.stoakes@oracle.com,\n\tlyude@redhat.com,\n\tdakr@kernel.org,\n\tairlied@gmail.com,\n\tsimona@ffwll.ch,\n\trcampbell@nvidia.com,\n\tmpenttil@redhat.com,\n\tjgg@nvidia.com,\n\twilly@infradead.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tintel-xe@lists.freedesktop.org,\n\tjgg@ziepe.ca,\n\tFelix.Kuehling@amd.com", "Subject": "[PATCH v2 02/11] drm/amdkfd: Use migrate pfns internally", "Date": "Wed, 7 Jan 2026 20:18:14 +1100", "Message-Id": "<20260107091823.68974-3-jniethe@nvidia.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20260107091823.68974-1-jniethe@nvidia.com>", "References": "<20260107091823.68974-1-jniethe@nvidia.com>", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "SJ0PR13CA0088.namprd13.prod.outlook.com\n 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"X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "A future change will remove device private pages from the physical\naddress space. This will mean that device private pages no longer have a\npfn.\n\nA MIGRATE_PFN flag will be introduced that distinguishes between mpfns\nthat contain a pfn vs an offset into device private memory.\n\nReplace usages of pfns and page_to_pfn() to mpfns and\nmigrate_pfn_to_page() to prepare for handling this distinction. This\nwill assist in continuing to use the same code paths for both\nMEMORY_DEVICE_PRIVATE and MEMORY_DEVICE_COHERENT devices.\n\nSigned-off-by: Jordan Niethe <jniethe@nvidia.com>\n---\nv2:\n - New to series\n---\n drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 15 +++++++--------\n drivers/gpu/drm/amd/amdkfd/kfd_migrate.h | 2 +-\n 2 files changed, 8 insertions(+), 9 deletions(-)", "diff": "diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c\nindex ca552c34ece2..c493b19268cc 100644\n--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c\n+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c\n@@ -204,17 +204,17 @@ svm_migrate_copy_done(struct amdgpu_device *adev, struct dma_fence *mfence)\n }\n \n unsigned long\n-svm_migrate_addr_to_pfn(struct amdgpu_device *adev, unsigned long addr)\n+svm_migrate_addr_to_mpfn(struct amdgpu_device *adev, unsigned long addr)\n {\n-\treturn (addr + adev->kfd.pgmap.range.start) >> PAGE_SHIFT;\n+\treturn migrate_pfn((addr + adev->kfd.pgmap.range.start) >> PAGE_SHIFT);\n }\n \n static void\n-svm_migrate_get_vram_page(struct svm_range *prange, unsigned long pfn)\n+svm_migrate_get_vram_page(struct svm_range *prange, unsigned long mpfn)\n {\n \tstruct page *page;\n \n-\tpage = pfn_to_page(pfn);\n+\tpage = migrate_pfn_to_page(mpfn);\n \tsvm_range_bo_ref(prange->svm_bo);\n \tpage->zone_device_data = prange->svm_bo;\n \tzone_device_page_init(page, 0);\n@@ -225,7 +225,7 @@ svm_migrate_put_vram_page(struct amdgpu_device *adev, unsigned long addr)\n {\n \tstruct page *page;\n \n-\tpage = pfn_to_page(svm_migrate_addr_to_pfn(adev, addr));\n+\tpage = migrate_pfn_to_page(svm_migrate_addr_to_mpfn(adev, addr));\n \tunlock_page(page);\n \tput_page(page);\n }\n@@ -235,7 +235,7 @@ svm_migrate_addr(struct amdgpu_device *adev, struct page *page)\n {\n \tunsigned long addr;\n \n-\taddr = page_to_pfn(page) << PAGE_SHIFT;\n+\taddr = (migrate_pfn_from_page(page) >> MIGRATE_PFN_SHIFT) << PAGE_SHIFT;\n \treturn (addr - adev->kfd.pgmap.range.start);\n }\n \n@@ -301,9 +301,8 @@ svm_migrate_copy_to_vram(struct kfd_node *node, struct svm_range *prange,\n \n \t\tif (migrate->src[i] & MIGRATE_PFN_MIGRATE) {\n \t\t\tdst[i] = cursor.start + (j << PAGE_SHIFT);\n-\t\t\tmigrate->dst[i] = svm_migrate_addr_to_pfn(adev, dst[i]);\n+\t\t\tmigrate->dst[i] = svm_migrate_addr_to_mpfn(adev, dst[i]);\n \t\t\tsvm_migrate_get_vram_page(prange, migrate->dst[i]);\n-\t\t\tmigrate->dst[i] = migrate_pfn(migrate->dst[i]);\n \t\t\tmpages++;\n \t\t}\n \t\tspage = migrate_pfn_to_page(migrate->src[i]);\ndiff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.h b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.h\nindex 2b7fd442d29c..a80b72abe1e0 100644\n--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.h\n+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.h\n@@ -48,7 +48,7 @@ int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm,\n \t\t\t uint32_t trigger, struct page *fault_page);\n \n unsigned long\n-svm_migrate_addr_to_pfn(struct amdgpu_device *adev, unsigned long addr);\n+svm_migrate_addr_to_mpfn(struct amdgpu_device *adev, unsigned long addr);\n \n #endif /* IS_ENABLED(CONFIG_HSA_AMD_SVM) */\n \n", "prefixes": [ "v2", "02/11" ] }