From patchwork Thu Mar 6 01:26:34 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Matthew Brost X-Patchwork-Id: 14003712 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 E67A6C28B22 for ; Thu, 6 Mar 2025 01:26:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AE8BC10E89E; Thu, 6 Mar 2025 01:26:01 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="J9YQu8Al"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4275E10E88F; 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05 Mar 2025 17:25:54 -0800 X-CSE-ConnectionGUID: SCrDZPFWQzum3TE7cQMQeQ== X-CSE-MsgGUID: BJBQXT8oQveCREmvwqU5Gw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="124063260" Received: from lstrano-desk.jf.intel.com ([10.54.39.91]) by orviesa005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2025 17:25:53 -0800 From: Matthew Brost To: intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: himal.prasad.ghimiray@intel.com, apopple@nvidia.com, airlied@gmail.com, thomas.hellstrom@linux.intel.com, simona.vetter@ffwll.ch, felix.kuehling@amd.com, dakr@kernel.org Subject: [PATCH v7 09/32] drm/xe: Add SVM init / close / fini to faulting VMs Date: Wed, 5 Mar 2025 17:26:34 -0800 Message-Id: <20250306012657.3505757-10-matthew.brost@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250306012657.3505757-1-matthew.brost@intel.com> References: <20250306012657.3505757-1-matthew.brost@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add SVM init / close / fini to faulting VMs. Minimual implementation acting as a placeholder for follow on patches. v2: - Add close function v3: - Better commit message (Thomas) - Kernel doc (Thomas) - Update chunk array to be unsigned long (Thomas) - Use new drm_gpusvm.h header location (Thomas) - Newlines between functions in xe_svm.h (Thomas) - Call drm_gpusvm_driver_set_lock in init (Thomas) v6: - Only compile if CONFIG_DRM_GPUSVM selected (CI, Lucas) v7: - Only select CONFIG_DRM_GPUSVM if DEVICE_PRIVATE (CI) Signed-off-by: Matthew Brost Reviewed-by: Himal Prasad Ghimiray Reviewed-by: Thomas Hellström --- drivers/gpu/drm/xe/Makefile | 1 + drivers/gpu/drm/xe/xe_svm.c | 73 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/xe/xe_svm.h | 35 +++++++++++++++ drivers/gpu/drm/xe/xe_vm.c | 12 ++++++ drivers/gpu/drm/xe/xe_vm_types.h | 7 +++ 5 files changed, 128 insertions(+) create mode 100644 drivers/gpu/drm/xe/xe_svm.c create mode 100644 drivers/gpu/drm/xe/xe_svm.h diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile index 1d52224355f1..9699b08585f7 100644 --- a/drivers/gpu/drm/xe/Makefile +++ b/drivers/gpu/drm/xe/Makefile @@ -125,6 +125,7 @@ xe-y += xe_bb.o \ xe_wopcm.o xe-$(CONFIG_HMM_MIRROR) += xe_hmm.o +xe-$(CONFIG_DRM_GPUSVM) += xe_svm.o # graphics hardware monitoring (HWMON) support xe-$(CONFIG_HWMON) += xe_hwmon.o diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c new file mode 100644 index 000000000000..79da859f02b1 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_svm.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2024 Intel Corporation + */ + +#include "xe_svm.h" +#include "xe_vm.h" +#include "xe_vm_types.h" + +static void xe_svm_invalidate(struct drm_gpusvm *gpusvm, + struct drm_gpusvm_notifier *notifier, + const struct mmu_notifier_range *mmu_range) +{ + /* TODO: Implement */ +} + +static const struct drm_gpusvm_ops gpusvm_ops = { + .invalidate = xe_svm_invalidate, +}; + +static const unsigned long fault_chunk_sizes[] = { + SZ_2M, + SZ_64K, + SZ_4K, +}; + +/** + * xe_svm_init() - SVM initialize + * @vm: The VM. + * + * Initialize SVM state which is embedded within the VM. + * + * Return: 0 on success, negative error code on error. + */ +int xe_svm_init(struct xe_vm *vm) +{ + int err; + + err = drm_gpusvm_init(&vm->svm.gpusvm, "Xe SVM", &vm->xe->drm, + current->mm, NULL, 0, vm->size, + SZ_512M, &gpusvm_ops, fault_chunk_sizes, + ARRAY_SIZE(fault_chunk_sizes)); + if (err) + return err; + + drm_gpusvm_driver_set_lock(&vm->svm.gpusvm, &vm->lock); + + return 0; +} + +/** + * xe_svm_close() - SVM close + * @vm: The VM. + * + * Close SVM state (i.e., stop and flush all SVM actions). + */ +void xe_svm_close(struct xe_vm *vm) +{ + xe_assert(vm->xe, xe_vm_is_closed(vm)); +} + +/** + * xe_svm_fini() - SVM finalize + * @vm: The VM. + * + * Finalize SVM state which is embedded within the VM. + */ +void xe_svm_fini(struct xe_vm *vm) +{ + xe_assert(vm->xe, xe_vm_is_closed(vm)); + + drm_gpusvm_fini(&vm->svm.gpusvm); +} diff --git a/drivers/gpu/drm/xe/xe_svm.h b/drivers/gpu/drm/xe/xe_svm.h new file mode 100644 index 000000000000..ac79b208304d --- /dev/null +++ b/drivers/gpu/drm/xe/xe_svm.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2024 Intel Corporation + */ + +#ifndef _XE_SVM_H_ +#define _XE_SVM_H_ + +struct xe_vm; + +#if IS_ENABLED(CONFIG_DRM_GPUSVM) +int xe_svm_init(struct xe_vm *vm); + +void xe_svm_fini(struct xe_vm *vm); + +void xe_svm_close(struct xe_vm *vm); +#else +static inline +int xe_svm_init(struct xe_vm *vm) +{ + return 0; +} + +static inline +void xe_svm_fini(struct xe_vm *vm) +{ +} + +static inline +void xe_svm_close(struct xe_vm *vm) +{ +} +#endif + +#endif diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index 5e9f5bb82bc7..178d38d447e1 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -35,6 +35,7 @@ #include "xe_pt.h" #include "xe_pxp.h" #include "xe_res_cursor.h" +#include "xe_svm.h" #include "xe_sync.h" #include "xe_trace_bo.h" #include "xe_wa.h" @@ -1581,6 +1582,12 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags) } } + if (flags & XE_VM_FLAG_FAULT_MODE) { + err = xe_svm_init(vm); + if (err) + goto err_close; + } + if (number_tiles > 1) vm->composite_fence_ctx = dma_fence_context_alloc(1); @@ -1626,6 +1633,8 @@ void xe_vm_close_and_put(struct xe_vm *vm) xe_vm_close(vm); if (xe_vm_in_preempt_fence_mode(vm)) flush_work(&vm->preempt.rebind_work); + if (xe_vm_in_fault_mode(vm)) + xe_svm_close(vm); down_write(&vm->lock); for_each_tile(tile, xe, id) { @@ -1694,6 +1703,9 @@ void xe_vm_close_and_put(struct xe_vm *vm) xe_vma_destroy_unlocked(vma); } + if (xe_vm_in_fault_mode(vm)) + xe_svm_fini(vm); + up_write(&vm->lock); down_write(&xe->usm.lock); diff --git a/drivers/gpu/drm/xe/xe_vm_types.h b/drivers/gpu/drm/xe/xe_vm_types.h index db7107e784c8..96ba631da68a 100644 --- a/drivers/gpu/drm/xe/xe_vm_types.h +++ b/drivers/gpu/drm/xe/xe_vm_types.h @@ -6,6 +6,7 @@ #ifndef _XE_VM_TYPES_H_ #define _XE_VM_TYPES_H_ +#include #include #include @@ -144,6 +145,12 @@ struct xe_vm { /** @gpuvm: base GPUVM used to track VMAs */ struct drm_gpuvm gpuvm; + /** @svm: Shared virtual memory state */ + struct { + /** @svm.gpusvm: base GPUSVM used to track fault allocations */ + struct drm_gpusvm gpusvm; + } svm; + struct xe_device *xe; /* exec queue used for (un)binding vma's */