From patchwork Tue Sep 13 15:27:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gupta, Anshuman" X-Patchwork-Id: 12974922 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 5CF7AC6FA82 for ; Tue, 13 Sep 2022 15:27:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 28ABB10E783; Tue, 13 Sep 2022 15:27:43 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7C97210E7A0 for ; Tue, 13 Sep 2022 15:27:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663082850; x=1694618850; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3bcLeTVub6QTQ2hDAcMDr3Q0ZhDca8RjK7szbkl7t5o=; b=Nxz4j4jnDqVOdPBj2zwf9GQoFEtPraqeMf/Mos0dAVoAnA7v5i9Q0MyY 7K9tZ2afIcYY91vReGgiKwP1RMj13O+USur/yOaT5GiIHVaBCiUZmif4G 4C+vkQn2AtJak1tex8c4PPGcKvpt+6wwf/f46YUCIubI/s7dB5k4Dbqe0 6MUpJGjXwBFrHVkoGCi0eYmeWpIiEs1fc4gP08relSndNEWOmwCPZ0wC5 iwI1Jy1pKit4rzpjIscS9gZhppgjIn5dWyQrSTLXzz9ghv77RMyOPE7Wp 2uqHbZzWJhrORcJU9D6zy3+tW4KVvSNf/99YLPe/k0PlVKZjQ+/79Bv9/ Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10469"; a="298172450" X-IronPort-AV: E=Sophos;i="5.93,313,1654585200"; d="scan'208";a="298172450" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2022 08:27:30 -0700 X-IronPort-AV: E=Sophos;i="5.93,313,1654585200"; d="scan'208";a="646971339" Received: from srr4-3-linux-105-anshuma1.iind.intel.com ([10.223.74.179]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2022 08:27:27 -0700 From: Anshuman Gupta To: intel-gfx@lists.freedesktop.org Date: Tue, 13 Sep 2022 20:57:13 +0530 Message-Id: <20220913152714.16541-2-anshuman.gupta@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20220913152714.16541-1-anshuman.gupta@intel.com> References: <20220913152714.16541-1-anshuman.gupta@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v5 1/2] drm/i915: Refactor userfault_wakeref to re-use X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: chris@chris-wilson.co.uk, rodrigo.vivi@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Refactor userfault_wakeref to re-use for discrete lmem mmap mapping as well, as on discrete GTT mmap are not supported. Moving userfault_wakeref from ggtt to gt structure. Signed-off-by: Anshuman Gupta Reviewed-by: Andi Shyti --- drivers/gpu/drm/i915/gem/i915_gem_mman.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_pm.c | 2 +- drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c | 1 - drivers/gpu/drm/i915/gt/intel_gt.c | 1 + drivers/gpu/drm/i915/gt/intel_gt_types.h | 3 +++ drivers/gpu/drm/i915/gt/intel_gtt.h | 3 --- drivers/gpu/drm/i915/i915_gem.c | 2 +- 7 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index 3218981488cc..b55befda3387 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -413,7 +413,7 @@ static vm_fault_t vm_fault_gtt(struct vm_fault *vmf) vma->mmo = mmo; if (CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND) - intel_wakeref_auto(&to_gt(i915)->ggtt->userfault_wakeref, + intel_wakeref_auto(&to_gt(i915)->userfault_wakeref, msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)); if (write) { diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pm.c b/drivers/gpu/drm/i915/gem/i915_gem_pm.c index 00359ec9d58b..3428f735e786 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_pm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_pm.c @@ -24,7 +24,7 @@ void i915_gem_suspend(struct drm_i915_private *i915) { GEM_TRACE("%s\n", dev_name(i915->drm.dev)); - intel_wakeref_auto(&to_gt(i915)->ggtt->userfault_wakeref, 0); + intel_wakeref_auto(&to_gt(i915)->userfault_wakeref, 0); flush_workqueue(i915->wq); /* diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c b/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c index cf4a326f5f48..ea775e601686 100644 --- a/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c +++ b/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c @@ -842,7 +842,6 @@ void intel_ggtt_init_fences(struct i915_ggtt *ggtt) INIT_LIST_HEAD(&ggtt->fence_list); INIT_LIST_HEAD(&ggtt->userfault_list); - intel_wakeref_auto_init(&ggtt->userfault_wakeref, uncore->rpm); detect_bit_6_swizzle(ggtt); diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index b59fb03ed274..07300b0a0873 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -805,6 +805,7 @@ static int intel_gt_tile_setup(struct intel_gt *gt, phys_addr_t phys_addr) } intel_uncore_init_early(gt->uncore, gt); + intel_wakeref_auto_init(>->userfault_wakeref, gt->uncore->rpm); ret = intel_uncore_setup_mmio(gt->uncore, phys_addr); if (ret) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h index 184ee9b11a4d..0757d9577551 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_types.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h @@ -156,6 +156,9 @@ struct intel_gt { */ intel_wakeref_t awake; + /* Manual runtime pm autosuspend delay for user GGTT/lmem mmaps */ + struct intel_wakeref_auto userfault_wakeref; + u32 clock_frequency; u32 clock_period_ns; diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h index e639434e97fd..c0ca53cba9f0 100644 --- a/drivers/gpu/drm/i915/gt/intel_gtt.h +++ b/drivers/gpu/drm/i915/gt/intel_gtt.h @@ -386,9 +386,6 @@ struct i915_ggtt { */ struct list_head userfault_list; - /* Manual runtime pm autosuspend delay for user GGTT mmaps */ - struct intel_wakeref_auto userfault_wakeref; - struct mutex error_mutex; struct drm_mm_node error_capture; struct drm_mm_node uc_fw; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index bae857d5221d..3463dd795950 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1209,7 +1209,7 @@ void i915_gem_driver_unregister(struct drm_i915_private *i915) void i915_gem_driver_remove(struct drm_i915_private *dev_priv) { - intel_wakeref_auto_fini(&to_gt(dev_priv)->ggtt->userfault_wakeref); + intel_wakeref_auto_fini(&to_gt(dev_priv)->userfault_wakeref); i915_gem_suspend_late(dev_priv); intel_gt_driver_remove(to_gt(dev_priv)); From patchwork Tue Sep 13 15:27:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gupta, Anshuman" X-Patchwork-Id: 12974923 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 01856C6FA82 for ; Tue, 13 Sep 2022 15:27:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7E48710E781; Tue, 13 Sep 2022 15:27:54 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id C2EEC10E781 for ; Tue, 13 Sep 2022 15:27:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663082853; x=1694618853; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=e/RrIYMBhwiIShhydY6PS+emV2QfDe7bQx3+MoQDaIE=; b=RNTi3ZUcQ2k34pVJR4tO5ZeEaaZgjxWxIkneW3lv2wk+qyRq/zkW3tcP NZxUAt4X8FHeLWvp6ZpSc/5UB8vy4AtdxWnT115vqYhiJTENrMq6yCASw whuUtKWQrK07VJnY+1MauQkh/DtUCqK7xhtI3msJLQfutElY6eZ+8EFzW baPBZEgXE21/0R4pmKnwMzT3qJh3ndMijazzcMSPY/zkEnI1MXdwFMIYY ITxPU/zrFWHWyrLgBOK1jKpsQ06KKIlPVMNAzeN0fHkbr0v7sdB5W9uOe zJNAD5XrZdR275ZT+RPHy4l9B6M4h1aUE4HjhntG5G3w0l9sQLkoyWhxK Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10469"; a="298172458" X-IronPort-AV: E=Sophos;i="5.93,313,1654585200"; d="scan'208";a="298172458" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2022 08:27:33 -0700 X-IronPort-AV: E=Sophos;i="5.93,313,1654585200"; d="scan'208";a="646971373" Received: from srr4-3-linux-105-anshuma1.iind.intel.com ([10.223.74.179]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2022 08:27:30 -0700 From: Anshuman Gupta To: intel-gfx@lists.freedesktop.org Date: Tue, 13 Sep 2022 20:57:14 +0530 Message-Id: <20220913152714.16541-3-anshuman.gupta@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20220913152714.16541-1-anshuman.gupta@intel.com> References: <20220913152714.16541-1-anshuman.gupta@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v5 2/2] drm/i915/dgfx: Release mmap on rpm suspend X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: chris@chris-wilson.co.uk, Matthew Auld , rodrigo.vivi@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Release all mmap mapping for all lmem objects which are associated with userfault such that, while pcie function in D3hot, any access to memory mappings will raise a userfault. Runtime resume the dgpu(when gem object lies in lmem). This will transition the dgpu graphics function to D0 state if it was in D3 in order to access the mmap memory mappings. v2: - Squashes the patches. [Matt Auld] - Add adequate locking for lmem_userfault_list addition. [Matt Auld] - Reused obj->userfault_count to avoid double addition. [Matt Auld] - Added i915_gem_object_lock to check i915_gem_object_is_lmem. [Matt Auld] v3: - Use i915_ttm_cpu_maps_iomem. [Matt Auld] - Fix 'ret == 0 to ret == VM_FAULT_NOPAGE'. [Matt Auld] - Reuse obj->userfault_count as a bool 0 or 1. [Matt Auld] - Delete the mmaped obj from lmem_userfault_list in obj destruction path. [Matt Auld] - Get a wakeref for object destruction patch. [Matt Auld] - Use intel_wakeref_auto to delay runtime PM. [Matt Auld] v4: - Avoid using mmo offset to get the vma_node. [Matt Auld] - Added comment to use the lmem_userfault_lock. [Matt Auld] - Get lmem_userfault_lock in i915_gem_object_release_mmap_offset. [Matt Auld] - Fixed kernel test robot generated warning. v5: - Addressed the cosmetics comments. [Andi] - Changed i915_gem_runtime_pm_object_release_mmap_offset() name to i915_gem_object_runtime_pm_release_mmap_offset() to be rhythmic. PCIe Specs 5.3.1.4.1 Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6331 Cc: Matthew Auld Cc: Rodrigo Vivi Signed-off-by: Anshuman Gupta Reviewed-by: Andi Shyti --- drivers/gpu/drm/i915/gem/i915_gem_mman.c | 21 +++++++++++ drivers/gpu/drm/i915/gem/i915_gem_mman.h | 1 + drivers/gpu/drm/i915/gem/i915_gem_object.c | 2 +- .../gpu/drm/i915/gem/i915_gem_object_types.h | 3 +- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 36 +++++++++++++++++-- drivers/gpu/drm/i915/gt/intel_gt.c | 2 ++ drivers/gpu/drm/i915/gt/intel_gt_types.h | 14 ++++++++ drivers/gpu/drm/i915/i915_gem.c | 4 +++ 8 files changed, 79 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index b55befda3387..73d9eda1d6b7 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -550,6 +550,20 @@ void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj) intel_runtime_pm_put(&i915->runtime_pm, wakeref); } +void i915_gem_object_runtime_pm_release_mmap_offset(struct drm_i915_gem_object *obj) +{ + struct ttm_buffer_object *bo = i915_gem_to_ttm(obj); + struct ttm_device *bdev = bo->bdev; + + drm_vma_node_unmap(&bo->base.vma_node, bdev->dev_mapping); + + if (obj->userfault_count) { + /* rpm wakeref provide exclusive access */ + list_del(&obj->userfault_link); + obj->userfault_count = 0; + } +} + void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj) { struct i915_mmap_offset *mmo, *mn; @@ -573,6 +587,13 @@ void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj) spin_lock(&obj->mmo.lock); } spin_unlock(&obj->mmo.lock); + + if (obj->userfault_count) { + mutex_lock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + list_del(&obj->userfault_link); + mutex_unlock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + obj->userfault_count = 0; + } } static struct i915_mmap_offset * diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.h b/drivers/gpu/drm/i915/gem/i915_gem_mman.h index efee9e0d2508..1fa91b3033b3 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.h @@ -27,6 +27,7 @@ int i915_gem_dumb_mmap_offset(struct drm_file *file_priv, void __i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj); void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj); +void i915_gem_object_runtime_pm_release_mmap_offset(struct drm_i915_gem_object *obj); void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj); #endif diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index 85482a04d158..7ff9c7877bec 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -238,7 +238,7 @@ static void __i915_gem_object_free_mmaps(struct drm_i915_gem_object *obj) { /* Skip serialisation and waking the device if known to be not used. */ - if (obj->userfault_count) + if (obj->userfault_count && !IS_DGFX(to_i915(obj->base.dev))) i915_gem_object_release_mmap_gtt(obj); if (!RB_EMPTY_ROOT(&obj->mmo.offsets)) { diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h index 9f6b14ec189a..40305e2bcd49 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -298,7 +298,8 @@ struct drm_i915_gem_object { }; /** - * Whether the object is currently in the GGTT mmap. + * Whether the object is currently in the GGTT or any other supported + * fake offset mmap backed by lmem. */ unsigned int userfault_count; struct list_head userfault_link; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index f64a3deb12fc..0544b0a4a43a 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -509,9 +509,18 @@ static int i915_ttm_shrink(struct drm_i915_gem_object *obj, unsigned int flags) static void i915_ttm_delete_mem_notify(struct ttm_buffer_object *bo) { struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo); + intel_wakeref_t wakeref = 0; if (likely(obj)) { + /* ttm_bo_release() already has dma_resv_lock */ + if (i915_ttm_cpu_maps_iomem(bo->resource)) + wakeref = intel_runtime_pm_get(&to_i915(obj->base.dev)->runtime_pm); + __i915_gem_object_pages_fini(obj); + + if (wakeref) + intel_runtime_pm_put(&to_i915(obj->base.dev)->runtime_pm, wakeref); + i915_ttm_free_cached_io_rsgt(obj); } } @@ -981,6 +990,7 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) struct ttm_buffer_object *bo = area->vm_private_data; struct drm_device *dev = bo->base.dev; struct drm_i915_gem_object *obj; + intel_wakeref_t wakeref = 0; vm_fault_t ret; int idx; @@ -1002,6 +1012,9 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) return VM_FAULT_SIGBUS; } + if (i915_ttm_cpu_maps_iomem(bo->resource)) + wakeref = intel_runtime_pm_get(&to_i915(obj->base.dev)->runtime_pm); + if (!i915_ttm_resource_mappable(bo->resource)) { int err = -ENODEV; int i; @@ -1023,7 +1036,8 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) if (err) { drm_dbg(dev, "Unable to make resource CPU accessible\n"); dma_resv_unlock(bo->base.resv); - return VM_FAULT_SIGBUS; + ret = VM_FAULT_SIGBUS; + goto out_rpm; } } @@ -1034,12 +1048,30 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) } else { ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot); } + if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) - return ret; + goto out_rpm; + + /* ttm_bo_vm_reserve() already has dma_resv_lock */ + if (ret == VM_FAULT_NOPAGE && wakeref && !obj->userfault_count) { + obj->userfault_count = 1; + mutex_lock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + list_add(&obj->userfault_link, &to_gt(to_i915(obj->base.dev))->lmem_userfault_list); + mutex_unlock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + } + + if (wakeref & CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND) + intel_wakeref_auto(&to_gt(to_i915(obj->base.dev))->userfault_wakeref, + msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)); i915_ttm_adjust_lru(obj); dma_resv_unlock(bo->base.resv); + +out_rpm: + if (wakeref) + intel_runtime_pm_put(&to_i915(obj->base.dev)->runtime_pm, wakeref); + return ret; } diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 07300b0a0873..d0b03a928b9a 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -40,6 +40,8 @@ void intel_gt_common_init_early(struct intel_gt *gt) { spin_lock_init(gt->irq_lock); + INIT_LIST_HEAD(>->lmem_userfault_list); + mutex_init(>->lmem_userfault_lock); INIT_LIST_HEAD(>->closed_vma); spin_lock_init(>->closed_lock); diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h index 0757d9577551..f19c2de77ff6 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_types.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h @@ -141,6 +141,20 @@ struct intel_gt { struct intel_wakeref wakeref; atomic_t user_wakeref; + /** + * Protects access to lmem usefault list. + * It is required, if we are outside of the runtime suspend path, + * access to @lmem_userfault_list requires always first grabbing the + * runtime pm, to ensure we can't race against runtime suspend. + * Once we have that we also need to grab @lmem_userfault_lock, + * at which point we have exclusive access. + * The runtime suspend path is special since it doesn't really hold any locks, + * but instead has exclusive access by virtue of all other accesses requiring + * holding the runtime pm wakeref. + */ + struct mutex lmem_userfault_lock; + struct list_head lmem_userfault_list; + struct list_head closed_vma; spinlock_t closed_lock; /* guards the list of closed_vma */ diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 3463dd795950..f18cc6270b2b 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -842,6 +842,10 @@ void i915_gem_runtime_suspend(struct drm_i915_private *i915) &to_gt(i915)->ggtt->userfault_list, userfault_link) __i915_gem_object_release_mmap_gtt(obj); + list_for_each_entry_safe(obj, on, + &to_gt(i915)->lmem_userfault_list, userfault_link) + i915_gem_object_runtime_pm_release_mmap_offset(obj); + /* * The fence will be lost when the device powers down. If any were * in use by hardware (i.e. they are pinned), we should not be powering