From patchwork Wed Jun 30 01:34:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 468927 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC34AC11F69 for ; Wed, 30 Jun 2021 01:34:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D579161D72 for ; Wed, 30 Jun 2021 01:34:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232311AbhF3BhJ (ORCPT ); Tue, 29 Jun 2021 21:37:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232137AbhF3BhG (ORCPT ); Tue, 29 Jun 2021 21:37:06 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A4986C061766 for ; Tue, 29 Jun 2021 18:34:37 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id i4so539833plt.12 for ; Tue, 29 Jun 2021 18:34:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=DFvfw3znc9/iNgUeu9+epS+fTvKPZKLuhAUaTL0kY/M=; b=oJpnLzmEuM+/uMBXpQoc4X8AngeoGclUDsnVQ33jUTM2egEVhMJCBUDpXcH6nrLmLx 82TQkoyi4f0rkpVhElAKnsaSTOfD6OmughNSeXmHMm+j4LHIzeDaZawrx4TFdwTvkvrZ 0m6YLmyM3JPKZ8t0/wSpkHfYfoZ4A9e2eiQIAkun3gG80Bv2aYJYlKVh5V2HokFE8Byx TN0BFmtpEVrmCsBlOzxffG4lfxMs3c2pDf5aLQfsmtPizwrjdnpBOK0zpapq/F9k2KvW PYJ4xkQ78400cqdx6qVaZ5sZDY5J2AxtEr6nCwEa+0qA9T50kiR/CxbeBV30DR1XWWdt 6I/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=DFvfw3znc9/iNgUeu9+epS+fTvKPZKLuhAUaTL0kY/M=; b=PVm1AOTVEWAmklX1zZaoX8AIltolJT2+B7pRYiXbx63qmMXbk0sY/6axK0NqnCy3t7 GUxrQBxKMKhFqDM4et6lI44ubmyipsj1Mob1EEc/NndpNUMjf7QGnKUYRWARlLvIeF1c mg5U3aXRzJGmoGYDYYH0cgq8jwXAhVtUwDkuWAt6BlQkhKFLFIaflwEIhV7JSFLSeB2Z 2xcC8qzMwO+OgExEmnfFct3tSbcAiay30ZEtyyxsuXJ4yPyuNqIbeUJWHBrhZspSVdaJ blutAEUZoDR/dqMiHUSwnlV2nrPdIPY1bMQm9hdTbdsJamJ4n6mym5c41N107XufU4yq A8KQ== X-Gm-Message-State: AOAM532OgMpmFZgJOpT74nAf51yaBuElHErK6eP6e3yXjAlM7YbWKTtt OXdzNsuaGJKdmSnYBWJqYigRhQ== X-Google-Smtp-Source: ABdhPJye9DDg0sagcLOtuXFoJZtGmUVapq2S6vfxaIYk+1HENhJqEUJ3Rpiz4dsjZGx74LGwHaDkvw== X-Received: by 2002:a17:902:6b84:b029:ee:f966:1911 with SMTP id p4-20020a1709026b84b02900eef9661911mr30460530plk.69.1625016877203; Tue, 29 Jun 2021 18:34:37 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id g8sm20252901pja.14.2021.06.29.18.34.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Jun 2021 18:34:36 -0700 (PDT) From: John Stultz To: lkml Cc: John Stultz , Daniel Vetter , Christian Koenig , Sumit Semwal , Liam Mark , Chris Goldsworthy , Laura Abbott , Brian Starkey , Hridya Valsaraju , Suren Baghdasaryan , Sandeep Patil , Daniel Mentz , =?utf-8?q?=C3=98rjan_Eide?= , Robin Murphy , Ezequiel Garcia , Simon Ser , James Jones , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v9 5/5] dma-buf: system_heap: Add deferred freeing to the system heap Date: Wed, 30 Jun 2021 01:34:21 +0000 Message-Id: <20210630013421.735092-6-john.stultz@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210630013421.735092-1-john.stultz@linaro.org> References: <20210630013421.735092-1-john.stultz@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Utilize the deferred free helper library in the system heap. This provides a nice performance bump and puts the system heap performance on par with ION. Cc: Daniel Vetter Cc: Christian Koenig Cc: Sumit Semwal Cc: Liam Mark Cc: Chris Goldsworthy Cc: Laura Abbott Cc: Brian Starkey Cc: Hridya Valsaraju Cc: Suren Baghdasaryan Cc: Sandeep Patil Cc: Daniel Mentz Cc: Ørjan Eide Cc: Robin Murphy Cc: Ezequiel Garcia Cc: Simon Ser Cc: James Jones Cc: linux-media@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: John Stultz --- v2: * Rework deferred-free api to use reason enum as suggested by Suren Baghdasaryan * Rework for deferred-free api change to use nr_pages rather than size as suggsted by Suren Baghdasaryan v8: * Reworked to drop buffer zeroing logic, as the drm_page_pool now handles that. --- drivers/dma-buf/heaps/Kconfig | 1 + drivers/dma-buf/heaps/system_heap.c | 28 ++++++++++++++++++++++------ 2 files changed, 23 insertions(+), 6 deletions(-) diff --git a/drivers/dma-buf/heaps/Kconfig b/drivers/dma-buf/heaps/Kconfig index 7e28934e0def..10632ccfb4a5 100644 --- a/drivers/dma-buf/heaps/Kconfig +++ b/drivers/dma-buf/heaps/Kconfig @@ -5,6 +5,7 @@ config DMABUF_HEAPS_SYSTEM bool "DMA-BUF System Heap" depends on DMABUF_HEAPS select DRM_PAGE_POOL + select DMABUF_HEAPS_DEFERRED_FREE help Choose this option to enable the system dmabuf heap. The system heap is backed by pages from the buddy allocator. If in doubt, say Y. diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c index 85ceca2ed61d..8a0170b0427e 100644 --- a/drivers/dma-buf/heaps/system_heap.c +++ b/drivers/dma-buf/heaps/system_heap.c @@ -22,6 +22,7 @@ #include #include +#include "deferred-free-helper.h" static struct dma_heap *sys_heap; @@ -33,6 +34,7 @@ struct system_heap_buffer { struct sg_table sg_table; int vmap_cnt; void *vaddr; + struct deferred_freelist_item deferred_free; }; struct dma_heap_attachment { @@ -290,27 +292,41 @@ static void system_heap_free_pages(struct drm_page_pool *pool, struct page *p) __free_pages(p, pool->order); } -static void system_heap_dma_buf_release(struct dma_buf *dmabuf) +static void system_heap_buf_free(struct deferred_freelist_item *item, + enum df_reason reason) { - struct system_heap_buffer *buffer = dmabuf->priv; + struct system_heap_buffer *buffer; struct sg_table *table; struct scatterlist *sg; int i, j; + buffer = container_of(item, struct system_heap_buffer, deferred_free); table = &buffer->sg_table; for_each_sg(table->sgl, sg, table->nents, i) { struct page *page = sg_page(sg); - for (j = 0; j < NUM_ORDERS; j++) { - if (compound_order(page) == orders[j]) - break; + if (reason == DF_UNDER_PRESSURE) { + __free_pages(page, compound_order(page)); + } else { + for (j = 0; j < NUM_ORDERS; j++) { + if (compound_order(page) == orders[j]) + break; + } + drm_page_pool_add(&pools[j], page); } - drm_page_pool_add(&pools[j], page); } sg_free_table(table); kfree(buffer); } +static void system_heap_dma_buf_release(struct dma_buf *dmabuf) +{ + struct system_heap_buffer *buffer = dmabuf->priv; + int npages = PAGE_ALIGN(buffer->len) / PAGE_SIZE; + + deferred_free(&buffer->deferred_free, system_heap_buf_free, npages); +} + static const struct dma_buf_ops system_heap_buf_ops = { .attach = system_heap_attach, .detach = system_heap_detach,