Message ID | 20220725151839.31622-1-dmitry.osipenko@collabora.com (mailing list archive) |
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Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from <linux-media-owner@vger.kernel.org>) id 1oFzuB-007x0y-Ke; Mon, 25 Jul 2022 15:22:01 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236419AbiGYPV4 (ORCPT <rfc822;mkrufky@linuxtv.org> + 1 other); Mon, 25 Jul 2022 11:21:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37682 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236303AbiGYPVn (ORCPT <rfc822;linux-media@vger.kernel.org>); Mon, 25 Jul 2022 11:21:43 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A95FD19018; Mon, 25 Jul 2022 08:20:51 -0700 (PDT) Received: from dimapc.. (109-252-119-232.nat.spd-mgts.ru [109.252.119.232]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dmitry.osipenko) by madras.collabora.co.uk (Postfix) with ESMTPSA id 105BA66015C8; Mon, 25 Jul 2022 16:20:47 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1658762449; bh=WDIIFq+FwvZE2r0LkWg7SRzWlcZ28eKnpAmrtcK8/Tw=; h=From:To:Cc:Subject:Date:From; b=fCTuAO8tPmjR8tSbNU7j5+ykPVxJHvHdPYqB/q+SO9WPw0GWAQAZkTjrZK8Ms+wxk G8rwf70tH+Z7xpEq8t/v+2fubGWelhddXEvkkJBM30fCF2yps5VAV7CIVdbtKRHH/w OMDdlnNZwyvWDn/TIT8zdX8oabwj94F+u00uDHGBHiSpimKonDm5oMmo+ApDHwm3EC dghjMfnSVgIYt6j+q/Nw01pS56Qm7i6GdsZfcBRRx9eD0F7n9BQjVuPuclpu0BAGPD CW1k5b1tcXd3QaLbqsMsOWWl5s6Kpo4O5oGyowxH7HT1f+It08Ez+VTu4+PAIC5gAI dmKpANkjOU+wQ== From: Dmitry Osipenko <dmitry.osipenko@collabora.com> To: David Airlie <airlied@linux.ie>, Gerd Hoffmann <kraxel@redhat.com>, Gurchetan Singh <gurchetansingh@chromium.org>, Chia-I Wu <olvaffe@gmail.com>, Daniel Vetter <daniel@ffwll.ch>, Daniel Almeida <daniel.almeida@collabora.com>, Gert Wollny <gert.wollny@collabora.com>, Gustavo Padovan <gustavo.padovan@collabora.com>, Daniel Stone <daniel@fooishbar.org>, Tomeu Vizoso <tomeu.vizoso@collabora.com>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de>, Rob Clark <robdclark@gmail.com>, Sumit Semwal <sumit.semwal@linaro.org>, =?utf-8?q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>, "Pan, Xinhui" <Xinhui.Pan@amd.com>, Thierry Reding <thierry.reding@gmail.com>, Tomasz Figa <tfiga@chromium.org>, Marek Szyprowski <m.szyprowski@samsung.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Alex Deucher <alexander.deucher@amd.com>, Jani Nikula <jani.nikula@linux.intel.com>, Joonas Lahtinen <joonas.lahtinen@linux.intel.com>, Rodrigo Vivi <rodrigo.vivi@intel.com>, Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>, =?utf-8?q?Thomas_Hellstr?= =?utf-8?q?=C3=B6m?= <thomas_os@shipmail.org> Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dmitry Osipenko <digetx@gmail.com>, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, kernel@collabora.com, virtualization@lists.linux-foundation.org, spice-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v2 0/5] Move all drivers to a common dma-buf locking convention Date: Mon, 25 Jul 2022 18:18:34 +0300 Message-Id: <20220725151839.31622-1-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-media.vger.kernel.org> X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no |
Series |
Move all drivers to a common dma-buf locking convention
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Message
Dmitry Osipenko
July 25, 2022, 3:18 p.m. UTC
Hello, This series moves all drivers to a dynamic dma-buf locking specification. From now on all dma-buf importers are made responsible for holding dma-buf's reservation lock around all operations performed over dma-bufs in accordance to the locking specification. This allows us to utilize reservation lock more broadly around kernel without fearing of a potential deadlocks. This patchset passes all i915 selftests. It was also tested using VirtIO, Panfrost, Lima and Tegra drivers. I tested cases of display+GPU, display+V4L and GPU+V4L dma-buf sharing, which covers majority of kernel drivers since rest of the drivers share same or similar code paths. Changelog: v2: - Changed locking specification to avoid problems with a cross-driver ww locking, like was suggested by Christian König. Now the attach/detach callbacks are invoked without the held lock and exporter should take the lock. - Added "locking convention" documentation that explains which dma-buf functions and callbacks are locked/unlocked for importers and exporters, which was requested by Christian König. - Added ack from Tomasz Figa to the V4L patches that he gave to v1. Dmitry Osipenko (5): dma-buf: Add _unlocked postfix to function names drm/gem: Take reservation lock for vmap/vunmap operations dma-buf: Move all dma-bufs to dynamic locking specification media: videobuf2: Stop using internal dma-buf lock dma-buf: Remove internal lock Documentation/driver-api/dma-buf.rst | 6 + drivers/dma-buf/dma-buf.c | 253 +++++++++++++----- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 4 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 +- drivers/gpu/drm/armada/armada_gem.c | 14 +- drivers/gpu/drm/drm_client.c | 4 +- drivers/gpu/drm/drm_gem.c | 24 ++ drivers/gpu/drm/drm_gem_cma_helper.c | 6 +- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 +- drivers/gpu/drm/drm_gem_shmem_helper.c | 6 +- drivers/gpu/drm/drm_prime.c | 12 +- drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 6 +- drivers/gpu/drm/exynos/exynos_drm_gem.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 14 +- .../drm/i915/gem/selftests/i915_gem_dmabuf.c | 20 +- drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 8 +- drivers/gpu/drm/qxl/qxl_object.c | 17 +- drivers/gpu/drm/qxl/qxl_prime.c | 4 +- drivers/gpu/drm/tegra/gem.c | 27 +- drivers/infiniband/core/umem_dmabuf.c | 11 +- .../common/videobuf2/videobuf2-dma-contig.c | 26 +- .../media/common/videobuf2/videobuf2-dma-sg.c | 23 +- .../common/videobuf2/videobuf2-vmalloc.c | 17 +- .../platform/nvidia/tegra-vde/dmabuf-cache.c | 12 +- drivers/misc/fastrpc.c | 12 +- drivers/xen/gntdev-dmabuf.c | 14 +- include/drm/drm_gem.h | 3 + include/linux/dma-buf.h | 71 ++--- 28 files changed, 372 insertions(+), 254 deletions(-)