From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 528F0D6E2AF for ; Thu, 18 Dec 2025 16:22:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0DFBF10EA2F; Thu, 18 Dec 2025 16:22:22 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="EtNvVKCG"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2DD8610EA47; Thu, 18 Dec 2025 16:22:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1766074939; x=1797610939; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SajPjBoR7UrIfspLYhwd8p43cIeQVQo1ZIYoZJu6pBY=; b=EtNvVKCGe6Kgp3nZJcHlZUOwAsxqhZYDiEczOtyqbG+SEzH8Ld9AESx4 K2yKf2artvEujOqanzYYV0nOV/zX9V6Dv7B049hC3GinBr7uAOMF6OMYF Q7PlXyUi/3gSW/oMLlcSutE+U+TSCIhiDxbBTaVTOP9Wn6qNR6Eo2e3mI 6JEOMfu8NNir3IY2aujgu+2ZIookVUHJDf03wgQFuUVz6o24zMPftNnt5 jKPoJCDToBsIQfgUTPmNFaHqsZydZ5E1X3wA9ix17waPUd75g24Ebow0Q 92ukV6ktRX8dejXiIq8y3ysey47tBbJclu567FyNiFw1I+Sx79XD1LSPC Q==; X-CSE-ConnectionGUID: /nxxzIfrS6ONfnCvZIauIg== X-CSE-MsgGUID: EzXIiDwlQyyGZ9Esuvqwww== X-IronPort-AV: E=McAfee;i="6800,10657,11646"; a="70607642" X-IronPort-AV: E=Sophos;i="6.21,158,1763452800"; d="scan'208";a="70607642" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Dec 2025 08:22:19 -0800 X-CSE-ConnectionGUID: EtKsQobJSEmFLjM/c4y4sQ== X-CSE-MsgGUID: wujMwRAjTwyZwOhzUXguDw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,158,1763452800"; d="scan'208";a="203705699" Received: from dhhellew-desk2.ger.corp.intel.com (HELO fedora) ([10.245.244.93]) by orviesa005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Dec 2025 08:22:15 -0800 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= To: intel-xe@lists.freedesktop.org Cc: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Matthew Brost , dri-devel@lists.freedesktop.org, himal.prasad.ghimiray@intel.com, apopple@nvidia.com, airlied@gmail.com, Simona Vetter , felix.kuehling@amd.com, =?UTF-8?q?Christian=20K=C3=B6nig?= , dakr@kernel.org, "Mrozek, Michal" , Joonas Lahtinen Subject: [PATCH v5 12/24] drm/xe: Pass a drm_pagemap pointer around with the memory advise attributes Date: Thu, 18 Dec 2025 17:20:49 +0100 Message-ID: <20251218162101.605379-13-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251218162101.605379-1-thomas.hellstrom@linux.intel.com> References: <20251218162101.605379-1-thomas.hellstrom@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" As a consequence, struct xe_vma_mem_attr() can't simply be assigned or freed without taking the reference count of individual members into account. Also add helpers to do that. v2: - Move some calls to xe_vma_mem_attr_fini() to xe_vma_free(). (Matt Brost) v3: - Rebase. Signed-off-by: Thomas Hellström Reviewed-by: Matthew Brost #v2 --- drivers/gpu/drm/xe/xe_svm.c | 12 +++++++---- drivers/gpu/drm/xe/xe_vm.c | 34 +++++++++++++++++++++++++----- drivers/gpu/drm/xe/xe_vm.h | 1 + drivers/gpu/drm/xe/xe_vm_madvise.c | 1 + drivers/gpu/drm/xe/xe_vm_types.h | 9 ++++++++ 5 files changed, 48 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c index 4e2d7751dc95..fba40bf76586 100644 --- a/drivers/gpu/drm/xe/xe_svm.c +++ b/drivers/gpu/drm/xe/xe_svm.c @@ -290,10 +290,14 @@ static int __xe_svm_garbage_collector(struct xe_vm *vm, static void xe_vma_set_default_attributes(struct xe_vma *vma) { - vma->attr.preferred_loc.devmem_fd = DRM_XE_PREFERRED_LOC_DEFAULT_DEVICE; - vma->attr.preferred_loc.migration_policy = DRM_XE_MIGRATE_ALL_PAGES; - vma->attr.pat_index = vma->attr.default_pat_index; - vma->attr.atomic_access = DRM_XE_ATOMIC_UNDEFINED; + struct xe_vma_mem_attr default_attr = { + .preferred_loc.devmem_fd = DRM_XE_PREFERRED_LOC_DEFAULT_DEVICE, + .preferred_loc.migration_policy = DRM_XE_MIGRATE_ALL_PAGES, + .pat_index = vma->attr.default_pat_index, + .atomic_access = DRM_XE_ATOMIC_UNDEFINED, + }; + + xe_vma_mem_attr_copy(&vma->attr, &default_attr); } static int xe_svm_range_set_default_attr(struct xe_vm *vm, u64 start, u64 end) diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index 0b8412574777..351046c9587b 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -957,14 +957,37 @@ struct dma_fence *xe_vm_range_unbind(struct xe_vm *vm, return fence; } +static void xe_vma_mem_attr_fini(struct xe_vma_mem_attr *attr) +{ + drm_pagemap_put(attr->preferred_loc.dpagemap); +} + static void xe_vma_free(struct xe_vma *vma) { + xe_vma_mem_attr_fini(&vma->attr); + if (xe_vma_is_userptr(vma)) kfree(to_userptr_vma(vma)); else kfree(vma); } +/** + * xe_vma_mem_attr_copy() - copy an xe_vma_mem_attr structure. + * @to: Destination. + * @from: Source. + * + * Copies an xe_vma_mem_attr structure taking care to get reference + * counting of individual members right. + */ +void xe_vma_mem_attr_copy(struct xe_vma_mem_attr *to, struct xe_vma_mem_attr *from) +{ + xe_vma_mem_attr_fini(to); + *to = *from; + if (to->preferred_loc.dpagemap) + drm_pagemap_get(to->preferred_loc.dpagemap); +} + static struct xe_vma *xe_vma_create(struct xe_vm *vm, struct xe_bo *bo, u64 bo_offset_or_userptr, @@ -1015,8 +1038,7 @@ static struct xe_vma *xe_vma_create(struct xe_vm *vm, if (vm->xe->info.has_atomic_enable_pte_bit) vma->gpuva.flags |= XE_VMA_ATOMIC_PTE_BIT; - vma->attr = *attr; - + xe_vma_mem_attr_copy(&vma->attr, attr); if (bo) { struct drm_gpuvm_bo *vm_bo; @@ -4324,7 +4346,7 @@ static int xe_vm_alloc_vma(struct xe_vm *vm, struct drm_gpuva_op *__op; unsigned int vma_flags = 0; bool remap_op = false; - struct xe_vma_mem_attr tmp_attr; + struct xe_vma_mem_attr tmp_attr = {}; u16 default_pat; int err; @@ -4419,7 +4441,7 @@ static int xe_vm_alloc_vma(struct xe_vm *vm, * VMA, so they can be assigned to newly MAP created vma. */ if (is_madvise) - tmp_attr = vma->attr; + xe_vma_mem_attr_copy(&tmp_attr, &vma->attr); xe_vma_destroy(gpuva_to_vma(op->base.remap.unmap->va), NULL); } else if (__op->op == DRM_GPUVA_OP_MAP) { @@ -4429,12 +4451,13 @@ static int xe_vm_alloc_vma(struct xe_vm *vm, * copy them to new vma. */ if (is_madvise) - vma->attr = tmp_attr; + xe_vma_mem_attr_copy(&vma->attr, &tmp_attr); } } xe_vm_unlock(vm); drm_gpuva_ops_free(&vm->gpuvm, ops); + xe_vma_mem_attr_fini(&tmp_attr); return 0; unwind_ops: @@ -4532,3 +4555,4 @@ int xe_vm_alloc_cpu_addr_mirror_vma(struct xe_vm *vm, uint64_t start, uint64_t r return xe_vm_alloc_vma(vm, &map_req, false); } + diff --git a/drivers/gpu/drm/xe/xe_vm.h b/drivers/gpu/drm/xe/xe_vm.h index 361f10b3c453..7d11ca47d73e 100644 --- a/drivers/gpu/drm/xe/xe_vm.h +++ b/drivers/gpu/drm/xe/xe_vm.h @@ -414,4 +414,5 @@ static inline struct drm_exec *xe_vm_validation_exec(struct xe_vm *vm) #define xe_vm_has_valid_gpu_mapping(tile, tile_present, tile_invalidated) \ ((READ_ONCE(tile_present) & ~READ_ONCE(tile_invalidated)) & BIT((tile)->id)) +void xe_vma_mem_attr_copy(struct xe_vma_mem_attr *to, struct xe_vma_mem_attr *from); #endif diff --git a/drivers/gpu/drm/xe/xe_vm_madvise.c b/drivers/gpu/drm/xe/xe_vm_madvise.c index cad3cf627c3f..9553008409d1 100644 --- a/drivers/gpu/drm/xe/xe_vm_madvise.c +++ b/drivers/gpu/drm/xe/xe_vm_madvise.c @@ -95,6 +95,7 @@ static void madvise_preferred_mem_loc(struct xe_device *xe, struct xe_vm *vm, */ vmas[i]->attr.preferred_loc.migration_policy = op->preferred_mem_loc.migration_policy; + vmas[i]->attr.preferred_loc.dpagemap = NULL; } } } diff --git a/drivers/gpu/drm/xe/xe_vm_types.h b/drivers/gpu/drm/xe/xe_vm_types.h index cfce18762aa7..5876a966ed24 100644 --- a/drivers/gpu/drm/xe/xe_vm_types.h +++ b/drivers/gpu/drm/xe/xe_vm_types.h @@ -20,6 +20,8 @@ #include "xe_range_fence.h" #include "xe_userptr.h" +struct drm_pagemap; + struct xe_bo; struct xe_svm_range; struct xe_sync_entry; @@ -65,6 +67,13 @@ struct xe_vma_mem_attr { * closest device memory respectively. */ u32 devmem_fd; + /** + * @preferred_loc.dpagemap: Reference-counted pointer to the drm_pagemap preferred + * for migration on a SVM page-fault. The pointer is protected by the + * vm lock, and is %NULL if @devmem_fd should be consulted for special + * values. + */ + struct drm_pagemap *dpagemap; } preferred_loc; /** -- 2.51.1