From patchwork Fri Feb 5 08:06:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 377305 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=-13.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, 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 3A21DC433E0 for ; Fri, 5 Feb 2021 08:07:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF2B764F87 for ; Fri, 5 Feb 2021 08:07:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230221AbhBEIHT (ORCPT ); Fri, 5 Feb 2021 03:07:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231575AbhBEIHG (ORCPT ); Fri, 5 Feb 2021 03:07:06 -0500 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0742C06178A for ; Fri, 5 Feb 2021 00:06:26 -0800 (PST) Received: by mail-pg1-x52d.google.com with SMTP id b21so3992043pgk.7 for ; Fri, 05 Feb 2021 00:06:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=zKwoaw8bdzrF/FhsWPWtgeGzPvNKHujT195hYCj6ZCs=; b=K0THtBNlTDmpc3F2F9qo3PXiSflivANjFuhFHO0/w0OQkh9BJFI2DLfQCg3umFdPRT 9DU5VNc7SfomsN45a3Kb9J3ZAcxuU/PcFTQaVK8roWSeawag+xcKSAwCs5/MQo8f2H3d viFJJrrovEHFzeIeEu8FqgsGG29CWEPTETHs3GBuUPsPi0L7kJqZ/1FRq6mEPCH/5VDb 6V9juYaeCpzq6xCPRvBkXCRT98zvQdGItcWAQezWayHIaKbLl7aAMecJp3C2A6Upcqfq CHJNQWQRiVgDzfcgpmshCIoa3TqUQKF+dkdYVW/++YTotTS02mqYGn3sGt4SqKPViMJ0 ULZQ== 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:mime-version :content-transfer-encoding; bh=zKwoaw8bdzrF/FhsWPWtgeGzPvNKHujT195hYCj6ZCs=; b=eMIKlOWAzvumg9x2Pd9tndfGIu+dsCs4NiwCg+VdhDyV6PYx7bxoRnl6N4kJPGG/HF 03kmiszUEJK5P0rvVfr3u4csTCTwsjlmJgn26k7h4vytmDyRsOG9d2f6ZUMTZG9sfUrK 0ZKWI7g25CuhMYrfiVo9QIcCKPnwQdiB2YiPL9AE8Sfus12ycJvWnbzoQksKwroNRHGW WEzkTSIFuMvh5+JHQAw6zlImuNWMKX0Q2qlb6vQ1PT3YPPHLyX50DKzuha416FZ5WNtB iMiqiBfW9Zh7S6gOlYN+4tfoOngfEN0ZLFDrQ7TKuXMvSuVfV4PldecDaLVffd4vofpU 09Tg== X-Gm-Message-State: AOAM531pXfKK4dFzEg46Lw+KmwwEwg89SZCN24pdFBDk96CgqgU7a4tF n4i+VgkE6tgLKTp+6YU/ImOlRg== X-Google-Smtp-Source: ABdhPJyRH2+aPnRrC0zh854reLPDhJihnNvupmtnylhjqPZmslPnqqJCsTysj9OXBE675MNHWcjGGA== X-Received: by 2002:a63:bc02:: with SMTP id q2mr3217163pge.198.1612512385535; Fri, 05 Feb 2021 00:06:25 -0800 (PST) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id 32sm9520070pgq.80.2021.02.05.00.06.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Feb 2021 00:06:24 -0800 (PST) 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: [RFC][PATCH v6 0/7] Generic page pool & deferred freeing for system dmabuf heap Date: Fri, 5 Feb 2021 08:06:14 +0000 Message-Id: <20210205080621.3102035-1-john.stultz@linaro.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This series is starting to get long, so I figured I'd add a short cover letter for context. The point of this series is trying to add both deferred-freeing logic as well as a page pool to the DMA-BUF system heap. This is desired, as the combination of deferred freeing along with the page pool allows us to offload page-zeroing out of the allocation hot path. This was done originally with ION and this patch series allows the DMA-BUF system heap to match ION's system heap allocation performance in a simple microbenchmark [1] (ION re-added to the kernel for comparision, running on an x86 vm image): ./dmabuf-heap-bench -i 0 1 system Testing dmabuf system vs ion heaptype 0 (flags: 0x1) --------------------------------------------- dmabuf heap: alloc 4096 bytes 5000 times in 86572223 ns 17314 ns/call ion heap: alloc 4096 bytes 5000 times in 97442526 ns 19488 ns/call dmabuf heap: alloc 1048576 bytes 5000 times in 196635057 ns 39327 ns/call ion heap: alloc 1048576 bytes 5000 times in 357323629 ns 71464 ns/call dmabuf heap: alloc 8388608 bytes 5000 times in 3165445534 ns 633089 ns/call ion heap: alloc 8388608 bytes 5000 times in 3699591271 ns 739918 ns/call dmabuf heap: alloc 33554432 bytes 5000 times in 13327402517 ns 2665480 ns/call ion heap: alloc 33554432 bytes 5000 times in 15292352796 ns 3058470 ns/call Daniel didn't like earlier attempts to re-use the network page-pool code to achieve this, and suggested the ttm_pool be used instead. This required pulling the fairly tightly knit ttm_pool logic apart, but after many failed attmempts I think I found a workable abstraction to split out shared logic. So this series contains a new generic drm_page_pool helper library, converts the ttm_pool to use it, and then adds the dmabuf deferred freeing and adds support to the dmabuf system heap to use both deferred freeing and the new drm_page_pool. Input would be greatly appreciated. Testing as well, as I don't have any development hardware that utilizes the ttm pool. thanks -john [1] https://android.googlesource.com/platform/system/memory/libdmabufheap/+/refs/heads/master/tests/dmabuf_heap_bench.c 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 John Stultz (7): drm: Add a sharable drm page-pool implementation drm: ttm_pool: Rename the ttm_pool_dma structure to ttm_pool_page_dat drm: ttm_pool: Rework ttm_pool_free_page to allow us to use it as a function pointer drm: ttm_pool: Rework ttm_pool to use drm_page_pool dma-buf: heaps: Add deferred-free-helper library code dma-buf: system_heap: Add drm pagepool support to system heap dma-buf: system_heap: Add deferred freeing to the system heap drivers/dma-buf/heaps/Kconfig | 5 + drivers/dma-buf/heaps/Makefile | 1 + drivers/dma-buf/heaps/deferred-free-helper.c | 145 ++++++++++ drivers/dma-buf/heaps/deferred-free-helper.h | 55 ++++ drivers/dma-buf/heaps/system_heap.c | 77 ++++- drivers/gpu/drm/Kconfig | 5 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/page_pool.c | 220 +++++++++++++++ drivers/gpu/drm/ttm/ttm_pool.c | 278 ++++++------------- include/drm/page_pool.h | 54 ++++ include/drm/ttm/ttm_pool.h | 23 +- 11 files changed, 639 insertions(+), 225 deletions(-) create mode 100644 drivers/dma-buf/heaps/deferred-free-helper.c create mode 100644 drivers/dma-buf/heaps/deferred-free-helper.h create mode 100644 drivers/gpu/drm/page_pool.c create mode 100644 include/drm/page_pool.h