From patchwork Thu Dec 21 04:37:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Oak Zeng X-Patchwork-Id: 13501075 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 97503C35274 for ; Thu, 21 Dec 2023 04:28:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E0AB410E665; Thu, 21 Dec 2023 04:28:23 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 04BF110E646; Thu, 21 Dec 2023 04:28:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1703132902; x=1734668902; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SnAGZEWVouqbngtFRpLMRdoRcj8w7Sa3qFCN3m4IV0s=; b=XV1kV2Wv1eaBs9DcLImF5q1n++Sj87KFO89YwaFV/tGdcdUL1kWL2nUu JHihqkTi4q1WkL1ZhS+MNxUJECY2DTf684XCwdSss5PVTcGDUjwLRM5tk AwCqkHTu099XlOW8Pb7pOBasVznp76niNwsJHVeG6eFrDIv8DYYjRt41d jDu4JNrhIh50HCJ76XgVEq8yI7avZpKN0qx3I9rGqRC8yav2LMDaaE91H SHUPz+io3YNlgUrPrYQIw7R4tTaFVQYTRxXoVEfrTtswN1yqPhvlzUVjk AXr4jj482C7huIaB5OwM+IQfHFRoPTL0eNG8n0QvtRlGqT4GBcYXCVvoC w==; X-IronPort-AV: E=McAfee;i="6600,9927,10930"; a="427069762" X-IronPort-AV: E=Sophos;i="6.04,293,1695711600"; d="scan'208";a="427069762" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2023 20:28:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10930"; a="805481346" X-IronPort-AV: E=Sophos;i="6.04,293,1695711600"; d="scan'208";a="805481346" Received: from szeng-desk.jf.intel.com ([10.165.21.149]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2023 20:28:20 -0800 From: Oak Zeng To: dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org Subject: [PATCH 03/22] drm/xe/svm: create xe svm during vm creation Date: Wed, 20 Dec 2023 23:37:53 -0500 Message-Id: <20231221043812.3783313-4-oak.zeng@intel.com> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20231221043812.3783313-1-oak.zeng@intel.com> References: <20231221043812.3783313-1-oak.zeng@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: , Cc: matthew.brost@intel.com, Thomas.Hellstrom@linux.intel.com, niranjana.vishwanathapura@intel.com, brian.welty@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Create the xe_svm struct during xe_vm creation. Add xe_svm to a global hash table so later on we can retrieve xe_svm using mm_struct (the key). Destroy svm process during xe_vm close. Also add a helper function to retrieve svm struct from mm struct Signed-off-by: Oak Zeng Cc: Niranjana Vishwanathapura Cc: Matthew Brost Cc: Thomas Hellström Cc: Brian Welty --- drivers/gpu/drm/xe/xe_svm.c | 63 +++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/xe/xe_svm.h | 11 +++++++ drivers/gpu/drm/xe/xe_vm.c | 5 +++ 3 files changed, 79 insertions(+) create mode 100644 drivers/gpu/drm/xe/xe_svm.c diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c new file mode 100644 index 000000000000..559188471949 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_svm.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2023 Intel Corporation + */ + +#include +#include +#include "xe_svm.h" + +DEFINE_HASHTABLE(xe_svm_table, XE_MAX_SVM_PROCESS); + +/** + * xe_destroy_svm() - destroy a svm process + * + * @svm: the xe_svm to destroy + */ +void xe_destroy_svm(struct xe_svm *svm) +{ + hash_del_rcu(&svm->hnode); + mutex_destroy(&svm->mutex); + kfree(svm); +} + +/** + * xe_create_svm() - create a svm process + * + * @vm: the xe_vm that we create svm process for + * + * Return the created xe svm struct + */ +struct xe_svm *xe_create_svm(struct xe_vm *vm) +{ + struct mm_struct *mm = current->mm; + struct xe_svm *svm; + + svm = kzalloc(sizeof(struct xe_svm), GFP_KERNEL); + svm->mm = mm; + svm->vm = vm; + mutex_init(&svm->mutex); + /** Add svm to global xe_svm_table hash table + * use mm as key so later we can retrieve svm using mm + */ + hash_add_rcu(xe_svm_table, &svm->hnode, (uintptr_t)mm); + return svm; +} + +/** + * xe_lookup_svm_by_mm() - retrieve xe_svm from mm struct + * + * @mm: the mm struct of the svm to retrieve + * + * Return the xe_svm struct pointer, or NULL if fail + */ +struct xe_svm *xe_lookup_svm_by_mm(struct mm_struct *mm) +{ + struct xe_svm *svm; + + hash_for_each_possible_rcu(xe_svm_table, svm, hnode, (uintptr_t)mm) + if (svm->mm == mm) + return svm; + + return NULL; +} diff --git a/drivers/gpu/drm/xe/xe_svm.h b/drivers/gpu/drm/xe/xe_svm.h index ba301a331f59..cd3cf92f3784 100644 --- a/drivers/gpu/drm/xe/xe_svm.h +++ b/drivers/gpu/drm/xe/xe_svm.h @@ -11,10 +11,15 @@ #include #include #include +#include +#include struct xe_vm; struct mm_struct; +#define XE_MAX_SVM_PROCESS 5 /* Maximumly support 32 SVM process*/ +extern DECLARE_HASHTABLE(xe_svm_table, XE_MAX_SVM_PROCESS); + /** * struct xe_svm - data structure to represent a shared * virtual address space from device side. xe_svm, xe_vm @@ -35,6 +40,8 @@ struct xe_svm { * @range_tree: Interval tree of all svm ranges in this svm */ struct rb_root_cached range_tree; + /** @hnode: used to add this svm to a global xe_svm_hash table*/ + struct hlist_node hnode; }; /** @@ -56,4 +63,8 @@ struct xe_svm_range { /** @inode: used to link this range to svm's range_tree */ struct interval_tree_node inode; }; + +void xe_destroy_svm(struct xe_svm *svm); +struct xe_svm *xe_create_svm(struct xe_vm *vm); +struct xe_svm *xe_lookup_svm_by_mm(struct mm_struct *mm); #endif diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index 1ca917b8315c..3c301a5c7325 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -36,6 +36,7 @@ #include "xe_trace.h" #include "generated/xe_wa_oob.h" #include "xe_wa.h" +#include "xe_svm.h" #define TEST_VM_ASYNC_OPS_ERROR @@ -1375,6 +1376,7 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags) xe->usm.num_vm_in_non_fault_mode++; mutex_unlock(&xe->usm.lock); + vm->svm = xe_create_svm(vm); trace_xe_vm_create(vm); return vm; @@ -1495,6 +1497,9 @@ void xe_vm_close_and_put(struct xe_vm *vm) for_each_tile(tile, xe, id) xe_range_fence_tree_fini(&vm->rftree[id]); + if (vm->svm) + xe_destroy_svm(vm->svm); + xe_vm_put(vm); }