From: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> To: intel-gfx@lists.freedesktop.org Cc: kenneth.w.graunke@intel.com, sanjay.k.kumar@intel.com, sudeep.dutt@intel.com, dri-devel@lists.freedesktop.org, jason.ekstrand@intel.com, dave.hansen@intel.com, jglisse@redhat.com, jon.bloomfield@intel.com, daniel.vetter@intel.com, dan.j.williams@intel.com, ira.weiny@intel.com, jgg@mellanox.com Subject: [RFC v2 07/12] drm/i915/svm: Implicitly migrate pages upon CPU fault Date: Fri, 13 Dec 2019 13:56:09 -0800 [thread overview] Message-ID: <20191213215614.24558-8-niranjana.vishwanathapura@intel.com> (raw) In-Reply-To: <20191213215614.24558-1-niranjana.vishwanathapura@intel.com> As PCIe is non-coherent link, do not allow direct memory access across PCIe link. Handle CPU fault by migrating pages back to host memory. Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Jon Bloomfield <jon.bloomfield@intel.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> --- drivers/gpu/drm/i915/i915_svm_devmem.c | 70 +++++++++++++++++++++++++- 1 file changed, 69 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_svm_devmem.c b/drivers/gpu/drm/i915/i915_svm_devmem.c index 0a1f1394f196..98ab27879041 100644 --- a/drivers/gpu/drm/i915/i915_svm_devmem.c +++ b/drivers/gpu/drm/i915/i915_svm_devmem.c @@ -286,9 +286,77 @@ int i915_devmem_migrate_vma(struct intel_memory_region *mem, return ret; } +static vm_fault_t +i915_devmem_fault_alloc_and_copy(struct i915_devmem_migrate *migrate) +{ + struct device *dev = migrate->i915->drm.dev; + struct migrate_vma *args = migrate->args; + struct page *dpage, *spage; + + DRM_DEBUG_DRIVER("start 0x%lx\n", args->start); + /* Allocate host page */ + spage = migrate_pfn_to_page(args->src[0]); + if (unlikely(!spage || !(args->src[0] & MIGRATE_PFN_MIGRATE))) + return 0; + + dpage = alloc_page_vma(GFP_HIGHUSER, args->vma, args->start); + if (unlikely(!dpage)) + return VM_FAULT_SIGBUS; + lock_page(dpage); + + args->dst[0] = migrate_pfn(page_to_pfn(dpage)) | MIGRATE_PFN_LOCKED; + + /* Copy the pages */ + migrate->npages = 1; + + return 0; +} + +void i915_devmem_fault_finalize_and_map(struct i915_devmem_migrate *migrate) +{ + DRM_DEBUG_DRIVER("\n"); +} + +static inline struct i915_devmem *page_to_devmem(struct page *page) +{ + return container_of(page->pgmap, struct i915_devmem, pagemap); +} + static vm_fault_t i915_devmem_migrate_to_ram(struct vm_fault *vmf) { - return VM_FAULT_SIGBUS; + struct i915_devmem *devmem = page_to_devmem(vmf->page); + struct drm_i915_private *i915 = devmem->i915; + struct i915_devmem_migrate migrate = {0}; + unsigned long src = 0, dst = 0; + vm_fault_t ret; + struct migrate_vma args = { + .vma = vmf->vma, + .start = vmf->address, + .end = vmf->address + PAGE_SIZE, + .src = &src, + .dst = &dst, + }; + + /* XXX: Opportunistically migrate more pages? */ + DRM_DEBUG_DRIVER("addr 0x%lx\n", args.start); + migrate.i915 = i915; + migrate.args = &args; + migrate.src_id = INTEL_REGION_LMEM; + migrate.dst_id = INTEL_REGION_SMEM; + if (migrate_vma_setup(&args) < 0) + return VM_FAULT_SIGBUS; + if (!args.cpages) + return 0; + + ret = i915_devmem_fault_alloc_and_copy(&migrate); + if (ret || dst == 0) + goto done; + + migrate_vma_pages(&args); + i915_devmem_fault_finalize_and_map(&migrate); +done: + migrate_vma_finalize(&args); + return ret; } static void i915_devmem_page_free(struct page *page) -- 2.21.0.rc0.32.g243a4c7e27 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
WARNING: multiple messages have this Message-ID (diff)
From: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> To: intel-gfx@lists.freedesktop.org Cc: kenneth.w.graunke@intel.com, sanjay.k.kumar@intel.com, dri-devel@lists.freedesktop.org, jason.ekstrand@intel.com, dave.hansen@intel.com, jglisse@redhat.com, daniel.vetter@intel.com, dan.j.williams@intel.com, ira.weiny@intel.com, jgg@mellanox.com Subject: [Intel-gfx] [RFC v2 07/12] drm/i915/svm: Implicitly migrate pages upon CPU fault Date: Fri, 13 Dec 2019 13:56:09 -0800 [thread overview] Message-ID: <20191213215614.24558-8-niranjana.vishwanathapura@intel.com> (raw) In-Reply-To: <20191213215614.24558-1-niranjana.vishwanathapura@intel.com> As PCIe is non-coherent link, do not allow direct memory access across PCIe link. Handle CPU fault by migrating pages back to host memory. Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Jon Bloomfield <jon.bloomfield@intel.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> --- drivers/gpu/drm/i915/i915_svm_devmem.c | 70 +++++++++++++++++++++++++- 1 file changed, 69 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_svm_devmem.c b/drivers/gpu/drm/i915/i915_svm_devmem.c index 0a1f1394f196..98ab27879041 100644 --- a/drivers/gpu/drm/i915/i915_svm_devmem.c +++ b/drivers/gpu/drm/i915/i915_svm_devmem.c @@ -286,9 +286,77 @@ int i915_devmem_migrate_vma(struct intel_memory_region *mem, return ret; } +static vm_fault_t +i915_devmem_fault_alloc_and_copy(struct i915_devmem_migrate *migrate) +{ + struct device *dev = migrate->i915->drm.dev; + struct migrate_vma *args = migrate->args; + struct page *dpage, *spage; + + DRM_DEBUG_DRIVER("start 0x%lx\n", args->start); + /* Allocate host page */ + spage = migrate_pfn_to_page(args->src[0]); + if (unlikely(!spage || !(args->src[0] & MIGRATE_PFN_MIGRATE))) + return 0; + + dpage = alloc_page_vma(GFP_HIGHUSER, args->vma, args->start); + if (unlikely(!dpage)) + return VM_FAULT_SIGBUS; + lock_page(dpage); + + args->dst[0] = migrate_pfn(page_to_pfn(dpage)) | MIGRATE_PFN_LOCKED; + + /* Copy the pages */ + migrate->npages = 1; + + return 0; +} + +void i915_devmem_fault_finalize_and_map(struct i915_devmem_migrate *migrate) +{ + DRM_DEBUG_DRIVER("\n"); +} + +static inline struct i915_devmem *page_to_devmem(struct page *page) +{ + return container_of(page->pgmap, struct i915_devmem, pagemap); +} + static vm_fault_t i915_devmem_migrate_to_ram(struct vm_fault *vmf) { - return VM_FAULT_SIGBUS; + struct i915_devmem *devmem = page_to_devmem(vmf->page); + struct drm_i915_private *i915 = devmem->i915; + struct i915_devmem_migrate migrate = {0}; + unsigned long src = 0, dst = 0; + vm_fault_t ret; + struct migrate_vma args = { + .vma = vmf->vma, + .start = vmf->address, + .end = vmf->address + PAGE_SIZE, + .src = &src, + .dst = &dst, + }; + + /* XXX: Opportunistically migrate more pages? */ + DRM_DEBUG_DRIVER("addr 0x%lx\n", args.start); + migrate.i915 = i915; + migrate.args = &args; + migrate.src_id = INTEL_REGION_LMEM; + migrate.dst_id = INTEL_REGION_SMEM; + if (migrate_vma_setup(&args) < 0) + return VM_FAULT_SIGBUS; + if (!args.cpages) + return 0; + + ret = i915_devmem_fault_alloc_and_copy(&migrate); + if (ret || dst == 0) + goto done; + + migrate_vma_pages(&args); + i915_devmem_fault_finalize_and_map(&migrate); +done: + migrate_vma_finalize(&args); + return ret; } static void i915_devmem_page_free(struct page *page) -- 2.21.0.rc0.32.g243a4c7e27 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2019-12-13 22:07 UTC|newest] Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-12-13 21:56 [RFC v2 00/12] drm/i915/svm: Add SVM support Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 01/12] drm/i915/svm: Add SVM documentation Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 02/12] drm/i915/svm: Runtime (RT) allocator support Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 22:58 ` Jason Ekstrand 2019-12-13 22:58 ` Jason Ekstrand 2019-12-13 23:13 ` Niranjan Vishwanathapura 2019-12-13 23:13 ` Niranjan Vishwanathapura 2019-12-14 0:36 ` Jason Ekstrand 2019-12-14 0:36 ` Jason Ekstrand 2019-12-14 10:31 ` Chris Wilson 2019-12-14 10:31 ` Chris Wilson 2019-12-16 4:13 ` Niranjan Vishwanathapura 2019-12-16 4:13 ` Niranjan Vishwanathapura 2019-12-17 18:01 ` Jason Ekstrand 2019-12-17 18:01 ` Jason Ekstrand 2019-12-18 23:25 ` Niranjana Vishwanathapura 2019-12-18 23:25 ` Niranjana Vishwanathapura 2019-12-14 10:56 ` Chris Wilson 2019-12-14 10:56 ` Chris Wilson 2019-12-16 4:15 ` Niranjan Vishwanathapura 2019-12-16 4:15 ` Niranjan Vishwanathapura 2019-12-18 22:51 ` Niranjana Vishwanathapura 2019-12-18 22:51 ` Niranjana Vishwanathapura 2019-12-17 20:18 ` Jason Gunthorpe 2019-12-17 20:18 ` [Intel-gfx] " Jason Gunthorpe 2019-12-18 23:34 ` Niranjana Vishwanathapura 2019-12-18 23:34 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 03/12] drm/i915/svm: Implicitly migrate BOs upon CPU access Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-14 10:58 ` Chris Wilson 2019-12-14 10:58 ` Chris Wilson 2019-12-16 4:17 ` Niranjan Vishwanathapura 2019-12-16 4:17 ` Niranjan Vishwanathapura 2019-12-13 21:56 ` [RFC v2 04/12] drm/i915/svm: Page table update support for SVM Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 05/12] drm/i915/svm: Page table mirroring support Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-17 20:31 ` Jason Gunthorpe 2019-12-17 20:31 ` [Intel-gfx] " Jason Gunthorpe 2019-12-18 22:41 ` Niranjana Vishwanathapura 2019-12-18 22:41 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-20 13:45 ` Jason Gunthorpe 2019-12-20 13:45 ` [Intel-gfx] " Jason Gunthorpe 2019-12-22 19:54 ` Niranjana Vishwanathapura 2019-12-22 19:54 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 06/12] drm/i915/svm: Device memory support Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-17 20:35 ` Jason Gunthorpe 2019-12-17 20:35 ` [Intel-gfx] " Jason Gunthorpe 2019-12-18 22:15 ` Niranjana Vishwanathapura 2019-12-18 22:15 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` Niranjana Vishwanathapura [this message] 2019-12-13 21:56 ` [Intel-gfx] [RFC v2 07/12] drm/i915/svm: Implicitly migrate pages upon CPU fault Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 08/12] drm/i915/svm: Page copy support during migration Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 09/12] drm/i915/svm: Add functions to blitter copy SVM buffers Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 10/12] drm/i915/svm: Use blitter copy for migration Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 11/12] drm/i915/svm: Add support to en/disable SVM Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-13 21:56 ` [RFC v2 12/12] drm/i915/svm: Add page table dump support Niranjana Vishwanathapura 2019-12-13 21:56 ` [Intel-gfx] " Niranjana Vishwanathapura 2019-12-14 1:32 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/svm: Add SVM support (rev2) Patchwork 2020-01-24 8:42 ` [RFC v2 00/12] drm/i915/svm: Add SVM support Niranjana Vishwanathapura 2020-01-24 8:42 ` [Intel-gfx] " Niranjana Vishwanathapura
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20191213215614.24558-8-niranjana.vishwanathapura@intel.com \ --to=niranjana.vishwanathapura@intel.com \ --cc=dan.j.williams@intel.com \ --cc=daniel.vetter@intel.com \ --cc=dave.hansen@intel.com \ --cc=dri-devel@lists.freedesktop.org \ --cc=intel-gfx@lists.freedesktop.org \ --cc=ira.weiny@intel.com \ --cc=jason.ekstrand@intel.com \ --cc=jgg@mellanox.com \ --cc=jglisse@redhat.com \ --cc=jon.bloomfield@intel.com \ --cc=kenneth.w.graunke@intel.com \ --cc=sanjay.k.kumar@intel.com \ --cc=sudeep.dutt@intel.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.