From patchwork Mon Jun 17 20:17:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Hellstr=C3=B6m_=28VMware=29?= X-Patchwork-Id: 11000425 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 666F61398 for ; Mon, 17 Jun 2019 20:18:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5263426E54 for ; Mon, 17 Jun 2019 20:18:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 46307286BC; Mon, 17 Jun 2019 20:18:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8005226E54 for ; Mon, 17 Jun 2019 20:18:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 464676E08E; Mon, 17 Jun 2019 20:18:18 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from ste-pvt-msa1.bahnhof.se (ste-pvt-msa1.bahnhof.se [213.80.101.70]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5B8EE89FC5 for ; Mon, 17 Jun 2019 20:18:17 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by ste-pvt-msa1.bahnhof.se (Postfix) with ESMTP id F30383F44D; Mon, 17 Jun 2019 22:18:15 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at bahnhof.se Received: from ste-pvt-msa1.bahnhof.se ([127.0.0.1]) by localhost (ste-pvt-msa1.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YXBqzaUs7E13; Mon, 17 Jun 2019 22:18:05 +0200 (CEST) Received: from mail1.shipmail.org (h-205-35.A357.priv.bahnhof.se [155.4.205.35]) (Authenticated sender: mb878879) by ste-pvt-msa1.bahnhof.se (Postfix) with ESMTPA id CADE9473E5; Mon, 17 Jun 2019 22:18:05 +0200 (CEST) Received: from localhost.localdomain.localdomain (h-205-35.A357.priv.bahnhof.se [155.4.205.35]) by mail1.shipmail.org (Postfix) with ESMTPSA id 81A6B3619C2; Mon, 17 Jun 2019 22:18:05 +0200 (CEST) From: =?utf-8?q?Thomas_Hellstr=C3=B6m_=28VMware=29?= To: dri-devel@lists.freedesktop.org Subject: [PATCH v7 7/9] drm/vmwgfx: Use an RBtree instead of linked list for MOB resources Date: Mon, 17 Jun 2019 22:17:54 +0200 Message-Id: <20190617201756.12587-8-thomas@shipmail.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190617201756.12587-1-thomas@shipmail.org> References: <20190617201756.12587-1-thomas@shipmail.org> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=shipmail.org; s=mail; t=1560802685; bh=ywu99SLn6S80+sqVBhdQUXNvrrN564QuiBbE0vgNWMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R2BthEptNsl7QdOQcwhzGZ4p1lP93BOuBKQp1M/QAbnB8CfI/0s9/h984W/kJh9tu fS30ddBToeUz1YGpL8p7MzfXgoJpFooqIKt9rmTyj3c6XhY/9y/pZWGD6HRnB0YvBy 5Y8+cTy8W47iqgHKqnO7Lo4ix4SxnCL4RX5NpLM8= X-Mailman-Original-Authentication-Results: ste-pvt-msa1.bahnhof.se; dkim=pass (1024-bit key; unprotected) header.d=shipmail.org header.i=@shipmail.org header.b=R2BthEpt; dkim-atps=neutral X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pv-drivers@vmware.com, linux-graphics-maintainer@vmware.com, linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Thomas Hellstrom With emulated coherent memory we need to be able to quickly look up a resource from the MOB offset. Instead of traversing a linked list with O(n) worst case, use an RBtree with O(log n) worst case complexity. Signed-off-by: Thomas Hellstrom Reviewed-by: Deepak Rawat --- drivers/gpu/drm/vmwgfx/vmwgfx_bo.c | 5 ++-- drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 10 +++---- drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 33 +++++++++++++++++------- 3 files changed, 32 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c index 90ca866640fe..e8bc7a7ac031 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c @@ -464,6 +464,7 @@ void vmw_bo_bo_free(struct ttm_buffer_object *bo) struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo); WARN_ON(vmw_bo->dirty); + WARN_ON(!RB_EMPTY_ROOT(&vmw_bo->res_tree)); vmw_bo_unmap(vmw_bo); kfree(vmw_bo); } @@ -480,6 +481,7 @@ static void vmw_user_bo_destroy(struct ttm_buffer_object *bo) struct vmw_buffer_object *vbo = &vmw_user_bo->vbo; WARN_ON(vbo->dirty); + WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree)); vmw_bo_unmap(vbo); ttm_prime_object_kfree(vmw_user_bo, prime); } @@ -515,8 +517,7 @@ int vmw_bo_init(struct vmw_private *dev_priv, memset(vmw_bo, 0, sizeof(*vmw_bo)); BUILD_BUG_ON(TTM_MAX_BO_PRIORITY <= 3); vmw_bo->base.priority = 3; - - INIT_LIST_HEAD(&vmw_bo->res_list); + vmw_bo->res_tree = RB_ROOT; ret = ttm_bo_init(bdev, &vmw_bo->base, size, ttm_bo_type_device, placement, diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index 27c259395790..9b347923196f 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -89,7 +89,7 @@ struct vmw_fpriv { /** * struct vmw_buffer_object - TTM buffer object with vmwgfx additions * @base: The TTM buffer object - * @res_list: List of resources using this buffer object as a backing MOB + * @res_tree: RB tree of resources using this buffer object as a backing MOB * @pin_count: pin depth * @dx_query_ctx: DX context if this buffer object is used as a DX query MOB * @map: Kmap object for semi-persistent mappings @@ -98,7 +98,7 @@ struct vmw_fpriv { */ struct vmw_buffer_object { struct ttm_buffer_object base; - struct list_head res_list; + struct rb_root res_tree; s32 pin_count; /* Not ref-counted. Protected by binding_mutex */ struct vmw_resource *dx_query_ctx; @@ -146,8 +146,8 @@ struct vmw_res_func; * pin-count greater than zero. It is not on the resource LRU lists and its * backup buffer is pinned. Hence it can't be evicted. * @func: Method vtable for this resource. Immutable. + * @mob_node; Node for the MOB backup rbtree. Protected by @backup reserved. * @lru_head: List head for the LRU list. Protected by @dev_priv::resource_lock. - * @mob_head: List head for the MOB backup list. Protected by @backup reserved. * @binding_head: List head for the context binding list. Protected by * the @dev_priv::binding_mutex * @res_free: The resource destructor. @@ -168,8 +168,8 @@ struct vmw_resource { unsigned long backup_offset; unsigned long pin_count; const struct vmw_res_func *func; + struct rb_node mob_node; struct list_head lru_head; - struct list_head mob_head; struct list_head binding_head; struct vmw_resource_dirty *dirty; void (*res_free) (struct vmw_resource *res); @@ -742,7 +742,7 @@ void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start, */ static inline bool vmw_resource_mob_attached(const struct vmw_resource *res) { - return !list_empty(&res->mob_head); + return !RB_EMPTY_NODE(&res->mob_node); } /** diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c index da9afa83fb4f..b84dd5953886 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c @@ -41,11 +41,24 @@ void vmw_resource_mob_attach(struct vmw_resource *res) { struct vmw_buffer_object *backup = res->backup; + struct rb_node **new = &backup->res_tree.rb_node, *parent = NULL; lockdep_assert_held(&backup->base.resv->lock.base); res->used_prio = (res->res_dirty) ? res->func->dirty_prio : res->func->prio; - list_add_tail(&res->mob_head, &backup->res_list); + + while (*new) { + struct vmw_resource *this = + container_of(*new, struct vmw_resource, mob_node); + + parent = *new; + new = (res->backup_offset < this->backup_offset) ? + &((*new)->rb_left) : &((*new)->rb_right); + } + + rb_link_node(&res->mob_node, parent, new); + rb_insert_color(&res->mob_node, &backup->res_tree); + vmw_bo_prio_add(backup, res->used_prio); } @@ -59,7 +72,8 @@ void vmw_resource_mob_detach(struct vmw_resource *res) lockdep_assert_held(&backup->base.resv->lock.base); if (vmw_resource_mob_attached(res)) { - list_del_init(&res->mob_head); + rb_erase(&res->mob_node, &backup->res_tree); + RB_CLEAR_NODE(&res->mob_node); vmw_bo_prio_del(backup, res->used_prio); } } @@ -206,8 +220,8 @@ int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, res->res_free = res_free; res->dev_priv = dev_priv; res->func = func; + RB_CLEAR_NODE(&res->mob_node); INIT_LIST_HEAD(&res->lru_head); - INIT_LIST_HEAD(&res->mob_head); INIT_LIST_HEAD(&res->binding_head); res->id = -1; res->backup = NULL; @@ -756,19 +770,20 @@ int vmw_resource_validate(struct vmw_resource *res, bool intr) */ void vmw_resource_unbind_list(struct vmw_buffer_object *vbo) { - - struct vmw_resource *res, *next; struct ttm_validate_buffer val_buf = { .bo = &vbo->base, .num_shared = 0 }; lockdep_assert_held(&vbo->base.resv->lock.base); - list_for_each_entry_safe(res, next, &vbo->res_list, mob_head) { - if (!res->func->unbind) - continue; + while (!RB_EMPTY_ROOT(&vbo->res_tree)) { + struct rb_node *node = vbo->res_tree.rb_node; + struct vmw_resource *res = + container_of(node, struct vmw_resource, mob_node); + + if (!WARN_ON_ONCE(!res->func->unbind)) + (void) res->func->unbind(res, res->res_dirty, &val_buf); - (void) res->func->unbind(res, res->res_dirty, &val_buf); res->backup_dirty = true; res->res_dirty = false; vmw_resource_mob_detach(res);