From patchwork Wed Aug 24 10:22:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12953201 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7DE83C32796 for ; Wed, 24 Aug 2022 10:24:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236924AbiHXKYH (ORCPT ); Wed, 24 Aug 2022 06:24:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38530 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236868AbiHXKYC (ORCPT ); Wed, 24 Aug 2022 06:24:02 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2FCD7F110; Wed, 24 Aug 2022 03:23:49 -0700 (PDT) Received: from dimapc.. (109-252-119-13.nat.spd-mgts.ru [109.252.119.13]) (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 0F8CE6601E85; Wed, 24 Aug 2022 11:23:46 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1661336628; bh=yJhLmWLiZYSaVVYpgyXfxz7ssZGXeWsgtJLIcgiYQhg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cR6l5P3hk+4DgOkFYE7b7ShOmufEVYIEoMuYmR+B9JRZEQsNkMZpX/Q4TdWCwG9bl cFJfBE7LTAU/dulmS8UMBFoANSxxnSMIJmzKS6FB+hRhsCHkIdD0B1pRMHBxPKR0G7 r4WBQ7qlhYOt+yLYJUtQNXRlVSLGlIz4TAuMpuH3n8+Noir1uc2e4xAYEqI3am2nAQ EHEZ2qLLS2EftDL48KSS7NszxIdF0Yhb3xzLozhcYxohDD0rJmR3jDIAnaMuxdqknf t0ki3DbaaSr2wpBm5cBtA+ZWcRnEXaxdeDfx4giTF07TzpSUxfP2ECsMorl9Skhctm /MrCMtEyAzCFQ== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Daniel Almeida , Gert Wollny , Gustavo Padovan , Daniel Stone , Tomeu Vizoso , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Clark , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , Thierry Reding , Tomasz Figa , Marek Szyprowski , Mauro Carvalho Chehab , Alex Deucher , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , =?utf-8?q?Thomas_Hellstr?= =?utf-8?q?=C3=B6m?= , Qiang Yu Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dmitry Osipenko , 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, linux-rdma@vger.kernel.org, linux-arm-msm@vger.kernel.org, lima@lists.freedesktop.org Subject: [PATCH v3 4/9] dma-buf: Move dma_buf_vmap/vunmap_unlocked() to dynamic locking specification Date: Wed, 24 Aug 2022 13:22:43 +0300 Message-Id: <20220824102248.91964-5-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220824102248.91964-1-dmitry.osipenko@collabora.com> References: <20220824102248.91964-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Move dma_buf_vmap/vunmap_unlocked() functions to the dynamic locking specification by taking the reservation lock. All the affected drivers were prepared to this change by a previous drm/gem patch. Signed-off-by: Dmitry Osipenko --- drivers/dma-buf/dma-buf.c | 8 ++++++++ drivers/gpu/drm/drm_prime.c | 4 ++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 34173aafe6c9..f358af401360 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -1398,6 +1398,8 @@ int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map) if (WARN_ON(!dmabuf)) return -EINVAL; + dma_resv_assert_held(dmabuf->resv); + if (!dmabuf->ops->vmap) return -EINVAL; @@ -1440,7 +1442,9 @@ int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) { int ret; + dma_resv_lock(dmabuf->resv, NULL); ret = dma_buf_vmap(dmabuf, map); + dma_resv_unlock(dmabuf->resv); return ret; } @@ -1456,6 +1460,8 @@ void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map) if (WARN_ON(!dmabuf)) return; + dma_resv_assert_held(dmabuf->resv); + BUG_ON(iosys_map_is_null(&dmabuf->vmap_ptr)); BUG_ON(dmabuf->vmapping_counter == 0); BUG_ON(!iosys_map_is_equal(&dmabuf->vmap_ptr, map)); @@ -1480,7 +1486,9 @@ void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map) if (WARN_ON(!dmabuf)) return; + dma_resv_lock(dmabuf->resv, NULL); dma_buf_vunmap(dmabuf, map); + dma_resv_unlock(dmabuf->resv); } EXPORT_SYMBOL_NS_GPL(dma_buf_vunmap_unlocked, DMA_BUF); diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 7a7710158880..e9b7d3fa67f1 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -682,7 +682,7 @@ int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv; - return drm_gem_vmap_unlocked(obj, map); + return drm_gem_vmap(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vmap); @@ -698,7 +698,7 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map) { struct drm_gem_object *obj = dma_buf->priv; - drm_gem_vunmap_unlocked(obj, map); + drm_gem_vunmap(obj, map); } EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);