From patchwork Wed Jun 30 01:34:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 12350997 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=unavailable 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 3D682C11F6A for ; Wed, 30 Jun 2021 01:34:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 284BF61D92 for ; Wed, 30 Jun 2021 01:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232135AbhF3BhG (ORCPT ); Tue, 29 Jun 2021 21:37:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51854 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232042AbhF3BhD (ORCPT ); Tue, 29 Jun 2021 21:37:03 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBD8CC061760 for ; Tue, 29 Jun 2021 18:34:34 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id b1so559637pls.5 for ; Tue, 29 Jun 2021 18:34:34 -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=7lwmLoDhSeUynyw9WpwUoeXd78SHIQUhC9+ggRtjsFY=; b=HBlk9uLZFBTPmMPZXa1DY3yBqmvzmoLq9Ga/hS6DV3Y3+0uu6Cm9LR/zISXJR6fOeZ 2MV8mIa2ielnvbs7nQz61soPcBst2ko+p169WKQAV9uGEe4EwPZ9oOpXACSwlTTk3NFQ O1vj4a+RurTq2Ka/FeTf/1mYe+EKjH3Jq+4//h3Wy3gMamx6gpGvk/jWd3dTZ/Ike12A bGHPqmy85MbuzF4v5xM+psqE8xDBcv0VTT2gs6X/Y23lHNgsX92PZV+dt3XuZmZXFP/i HqZ1uMOuBPYk+T8NWnglX/M0CeHZjgJEsocYYOa1vY6Fjat5gILcJ0r0gUdVM9GrsFB1 3ODA== 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=7lwmLoDhSeUynyw9WpwUoeXd78SHIQUhC9+ggRtjsFY=; b=skhQNEd6mosLknzXs47QkqQqtWx25nWqT6OJX3cmEoluii6Mgii4OkpTw4mHYVIjJj 57Ea4toeyzDWJIQEQvZaZB/ByjdYpce3EJenb7i4verUXMgmOx3wEEKVwOId385crnii XJGMdwWWIjM3d9YSLbuQmSkNizCYINg4lx5OhsdG+ETOgf307O9AdpP9CMTlM69a6+z5 PSG3WOcoOusZb39TptN9yfOEQcAAf5NN2YD3m0zfxXmUiiDYqYwdSoUb5gAcHYlbg6Ae y1agIVGeYDgE+PQkIc5o+/CbLTDMZQet2sjl27zl0dnnGkFgnfksfw0b6cXzPfEAGrGP 9cQg== X-Gm-Message-State: AOAM530ToQQpJw15f2L1M/ThjlHZBrCDcNh4C4oyaO0GLdJPSrWoTxKB bZkWX5D3Bm0tN1xJ2wWaMcEQIA== X-Google-Smtp-Source: ABdhPJxMWCmXP/0OjhKqFlMasVLKq7rLdoTzTd5HNImYqVgNkNOOmmOdq+gMPC9r1CKc6CFEJnq2fQ== X-Received: by 2002:a17:90a:5889:: with SMTP id j9mr36864843pji.234.1625016874317; Tue, 29 Jun 2021 18:34:34 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id g8sm20252901pja.14.2021.06.29.18.34.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Jun 2021 18:34:33 -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 3/5] dma-buf: system_heap: Add drm pagepool support to system heap Date: Wed, 30 Jun 2021 01:34:19 +0000 Message-Id: <20210630013421.735092-4-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 drm pagepool code to speed up allocation performance. This is similar to the ION pagepool usage, but tries to utilize generic code instead of a custom implementation. 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: * Fix build issue caused by selecting PAGE_POOL w/o NET as Reported-by: kernel test robot v3: * Simplify the page zeroing logic a bit by using kmap_atomic instead of vmap as suggested by Daniel Mentz v5: * Shift away from networking page pool completely to dmabuf page pool implementation v6: * Switch again to using the drm_page_pool code shared w/ ttm_pool v7: * Slight rework for drm_page_pool changes v8: * Rework to use the rewritten drm_page_pool logic * Drop explicit buffer zeroing, as the drm_page_pool handles that v9: * Fix compiler warning Reported-by: kernel test robot --- drivers/dma-buf/heaps/Kconfig | 1 + drivers/dma-buf/heaps/system_heap.c | 26 +++++++++++++++++++++++--- 2 files changed, 24 insertions(+), 3 deletions(-) diff --git a/drivers/dma-buf/heaps/Kconfig b/drivers/dma-buf/heaps/Kconfig index a5eef06c4226..f19bf1f82bc2 100644 --- a/drivers/dma-buf/heaps/Kconfig +++ b/drivers/dma-buf/heaps/Kconfig @@ -1,6 +1,7 @@ config DMABUF_HEAPS_SYSTEM bool "DMA-BUF System Heap" depends on DMABUF_HEAPS + select DRM_PAGE_POOL 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 f57a39ddd063..85ceca2ed61d 100644 --- a/drivers/dma-buf/heaps/system_heap.c +++ b/drivers/dma-buf/heaps/system_heap.c @@ -21,6 +21,8 @@ #include #include +#include + static struct dma_heap *sys_heap; struct system_heap_buffer { @@ -54,6 +56,7 @@ static gfp_t order_flags[] = {HIGH_ORDER_GFP, MID_ORDER_GFP, LOW_ORDER_GFP}; */ static const unsigned int orders[] = {8, 4, 0}; #define NUM_ORDERS ARRAY_SIZE(orders) +struct drm_page_pool pools[NUM_ORDERS]; static struct sg_table *dup_sg_table(struct sg_table *table) { @@ -282,18 +285,27 @@ static void system_heap_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map) dma_buf_map_clear(map); } +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) { struct system_heap_buffer *buffer = dmabuf->priv; struct sg_table *table; struct scatterlist *sg; - int i; + int i, j; table = &buffer->sg_table; for_each_sg(table->sgl, sg, table->nents, i) { struct page *page = sg_page(sg); - __free_pages(page, compound_order(page)); + for (j = 0; j < NUM_ORDERS; j++) { + if (compound_order(page) == orders[j]) + break; + } + drm_page_pool_add(&pools[j], page); } sg_free_table(table); kfree(buffer); @@ -324,7 +336,9 @@ static struct page *alloc_largest_available(unsigned long size, if (max_order < orders[i]) continue; - page = alloc_pages(order_flags[i], orders[i]); + page = drm_page_pool_remove(&pools[i]); + if (!page) + page = alloc_pages(order_flags[i], orders[i]); if (!page) continue; return page; @@ -425,6 +439,12 @@ static const struct dma_heap_ops system_heap_ops = { static int system_heap_create(void) { struct dma_heap_export_info exp_info; + int i; + + for (i = 0; i < NUM_ORDERS; i++) { + drm_page_pool_init(&pools[i], orders[i], + system_heap_free_pages); + } exp_info.name = "system"; exp_info.ops = &system_heap_ops;