From patchwork Mon Oct 21 11:15:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_K=C3=B6nig?= X-Patchwork-Id: 11201959 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 29D471515 for ; Mon, 21 Oct 2019 11:15:33 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 11DB1214B2 for ; Mon, 21 Oct 2019 11:15:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 11DB1214B2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DC3BF88FCF; Mon, 21 Oct 2019 11:15:30 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by gabe.freedesktop.org (Postfix) with ESMTPS id A443B88FCF; Mon, 21 Oct 2019 11:15:29 +0000 (UTC) Received: by mail-wr1-x443.google.com with SMTP id c2so8242573wrr.10; Mon, 21 Oct 2019 04:15:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=l5kZ6eJpVfLJBcQupT4Lazwgm6cKRgHlf0S9bM0ieRc=; b=lGaqENTQsB+VaQUl+CCCXu8ykqNo969Q7YgX4MitFcGAFZKBSidtBATaPy0KZrPIaQ UrOmfKz9XXzLB6aIgMa+q3Bve7+pTVjSBk5/8qZHSrA24SJw+KXmyemy6ArN0h29b55s pg5RbZTUecJeHts9M6qEPnSLSd8iXNnjWoq+RdN4E5NTBGw4Pj30TRWr6Kgji790yaE3 m605msH1wcO3CNKxQP5XwMazpunP9VVPza7OMcT/tqjdguupeg3bzBugrsoIPllwgeUE fskknYl3rLYji+2axnOapy7Y7hDvlGgAMCN4aphPQairW9yTurZCMJAvKrwXD1aftNZp V+Lw== X-Gm-Message-State: APjAAAWMyr8xIYvynsiX1lpsKTBn9ij4zT86qkqPCFxdEf3Q7Qs4cH4P /kUd0ZI8/NlJQdRAtk106hjYwhiL X-Google-Smtp-Source: APXvYqxp/vYKCrkXKrowLtxNRDfzE3ys4U2Kyc5wYjGju0uwFNJlRxpV4IfhX88e08wQ77TlU3so+Q== X-Received: by 2002:adf:f342:: with SMTP id e2mr20538782wrp.61.1571656527798; Mon, 21 Oct 2019 04:15:27 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:c194:dd41:4bef:70cc]) by smtp.gmail.com with ESMTPSA id l9sm13152415wme.45.2019.10.21.04.15.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Oct 2019 04:15:25 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: dri-devel@lists.freedesktop.org, sumit.semwal@linaro.org, linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org, daniel@ffwll.ch Subject: [PATCH 1/4] dma-buf: change DMA-buf locking convention v2 Date: Mon, 21 Oct 2019 13:15:21 +0200 Message-Id: <20191021111524.14793-1-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=l5kZ6eJpVfLJBcQupT4Lazwgm6cKRgHlf0S9bM0ieRc=; b=pKCfjq9Mt7EK/GAR1x7xlXQqEbq/gJCVmKZnowCqtJaXG7JS+c+DINqiLvath7brjp gRRiuSjlKHFdrzyc2uUFV/bB0wWnP+Qedi7ss1Yp7GTXut4sPIwGKoY0K43gPcPcJt+A cyZvEDBwDaNdf8X3Eifsqu4/7btnh1NJW56kw5CsCW99ob6cL+ZjVPztd1hIjjGk4DMZ 1LqYu3zW83JoKIAtlZG4rMx3+19i+uPO3SFXI47dp4E/M005pG+0CDL+c0U6g0HOlNBl 5PZRzka1rZdHdv0VDO8AcB0YLrOhIRG+i2Pm3xQWDkfzqGsUFOejRaYo/Z9g2rU+828S bJug== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This patch is a stripped down version of the locking changes necessary to support dynamic DMA-buf handling. It adds a dynamic flag for both importers as well as exporters so that drivers can choose if they want the reservation object locked or unlocked during mapping of attachments. For compatibility between drivers we cache the DMA-buf mapping during attaching an importer as soon as exporter/importer disagree on the dynamic handling. This change has gone through a lengthy discussion on dri-devel and other mailing lists with at least 3-4 different attempts and dead-ends until we settled on this solution. Please refer to the mailing lists archives for full background on the history of this change. v2: cleanup set_name merge, improve kerneldoc Signed-off-by: Christian König Reviewed-by: Daniel Vetter --- drivers/dma-buf/dma-buf.c | 102 +++++++++++++++++++++++++++++++++----- include/linux/dma-buf.h | 57 +++++++++++++++++++-- 2 files changed, 143 insertions(+), 16 deletions(-) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 433d91d710e4..753be84b5fd6 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -45,10 +45,10 @@ static char *dmabuffs_dname(struct dentry *dentry, char *buffer, int buflen) size_t ret = 0; dmabuf = dentry->d_fsdata; - mutex_lock(&dmabuf->lock); + dma_resv_lock(dmabuf->resv, NULL); if (dmabuf->name) ret = strlcpy(name, dmabuf->name, DMA_BUF_NAME_LEN); - mutex_unlock(&dmabuf->lock); + dma_resv_unlock(dmabuf->resv); return dynamic_dname(dentry, buffer, buflen, "/%s:%s", dentry->d_name.name, ret > 0 ? name : ""); @@ -334,7 +334,7 @@ static long dma_buf_set_name(struct dma_buf *dmabuf, const char __user *buf) if (IS_ERR(name)) return PTR_ERR(name); - mutex_lock(&dmabuf->lock); + dma_resv_lock(dmabuf->resv, NULL); if (!list_empty(&dmabuf->attachments)) { ret = -EBUSY; kfree(name); @@ -344,7 +344,7 @@ static long dma_buf_set_name(struct dma_buf *dmabuf, const char __user *buf) dmabuf->name = name; out_unlock: - mutex_unlock(&dmabuf->lock); + dma_resv_unlock(dmabuf->resv); return ret; } @@ -403,10 +403,10 @@ static void dma_buf_show_fdinfo(struct seq_file *m, struct file *file) /* Don't count the temporary reference taken inside procfs seq_show */ seq_printf(m, "count:\t%ld\n", file_count(dmabuf->file) - 1); seq_printf(m, "exp_name:\t%s\n", dmabuf->exp_name); - mutex_lock(&dmabuf->lock); + dma_resv_lock(dmabuf->resv, NULL); if (dmabuf->name) seq_printf(m, "name:\t%s\n", dmabuf->name); - mutex_unlock(&dmabuf->lock); + dma_resv_unlock(dmabuf->resv); } static const struct file_operations dma_buf_fops = { @@ -525,6 +525,10 @@ struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info) return ERR_PTR(-EINVAL); } + if (WARN_ON(exp_info->ops->cache_sgt_mapping && + exp_info->ops->dynamic_mapping)) + return ERR_PTR(-EINVAL); + if (!try_module_get(exp_info->owner)) return ERR_PTR(-ENOENT); @@ -645,10 +649,11 @@ void dma_buf_put(struct dma_buf *dmabuf) EXPORT_SYMBOL_GPL(dma_buf_put); /** - * dma_buf_attach - Add the device to dma_buf's attachments list; optionally, + * dma_buf_dynamic_attach - Add the device to dma_buf's attachments list; optionally, * calls attach() of dma_buf_ops to allow device-specific attach functionality - * @dmabuf: [in] buffer to attach device to. - * @dev: [in] device to be attached. + * @dmabuf: [in] buffer to attach device to. + * @dev: [in] device to be attached. + * @dynamic_mapping: [in] calling convention for map/unmap * * Returns struct dma_buf_attachment pointer for this attachment. Attachments * must be cleaned up by calling dma_buf_detach(). @@ -662,8 +667,9 @@ EXPORT_SYMBOL_GPL(dma_buf_put); * accessible to @dev, and cannot be moved to a more suitable place. This is * indicated with the error code -EBUSY. */ -struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, - struct device *dev) +struct dma_buf_attachment * +dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, + bool dynamic_mapping) { struct dma_buf_attachment *attach; int ret; @@ -677,6 +683,7 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, attach->dev = dev; attach->dmabuf = dmabuf; + attach->dynamic_mapping = dynamic_mapping; mutex_lock(&dmabuf->lock); @@ -685,16 +692,64 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, if (ret) goto err_attach; } + dma_resv_lock(dmabuf->resv, NULL); list_add(&attach->node, &dmabuf->attachments); + dma_resv_unlock(dmabuf->resv); mutex_unlock(&dmabuf->lock); + /* When either the importer or the exporter can't handle dynamic + * mappings we cache the mapping here to avoid issues with the + * reservation object lock. + */ + if (dma_buf_attachment_is_dynamic(attach) != + dma_buf_is_dynamic(dmabuf)) { + struct sg_table *sgt; + + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_resv_lock(attach->dmabuf->resv, NULL); + + sgt = dmabuf->ops->map_dma_buf(attach, DMA_BIDIRECTIONAL); + if (!sgt) + sgt = ERR_PTR(-ENOMEM); + if (IS_ERR(sgt)) { + ret = PTR_ERR(sgt); + goto err_unlock; + } + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_resv_unlock(attach->dmabuf->resv); + attach->sgt = sgt; + attach->dir = DMA_BIDIRECTIONAL; + } + return attach; err_attach: kfree(attach); mutex_unlock(&dmabuf->lock); return ERR_PTR(ret); + +err_unlock: + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_resv_unlock(attach->dmabuf->resv); + + dma_buf_detach(dmabuf, attach); + return ERR_PTR(ret); +} +EXPORT_SYMBOL_GPL(dma_buf_dynamic_attach); + +/** + * dma_buf_attach - Wrapper for dma_buf_dynamic_attach + * @dmabuf: [in] buffer to attach device to. + * @dev: [in] device to be attached. + * + * Wrapper to call dma_buf_dynamic_attach() for drivers which still use a static + * mapping. + */ +struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, + struct device *dev) +{ + return dma_buf_dynamic_attach(dmabuf, dev, false); } EXPORT_SYMBOL_GPL(dma_buf_attach); @@ -711,11 +766,20 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach) if (WARN_ON(!dmabuf || !attach)) return; - if (attach->sgt) + if (attach->sgt) { + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_resv_lock(attach->dmabuf->resv, NULL); + dmabuf->ops->unmap_dma_buf(attach, attach->sgt, attach->dir); + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_resv_unlock(attach->dmabuf->resv); + } + mutex_lock(&dmabuf->lock); + dma_resv_lock(dmabuf->resv, NULL); list_del(&attach->node); + dma_resv_unlock(dmabuf->resv); if (dmabuf->ops->detach) dmabuf->ops->detach(dmabuf, attach); @@ -749,6 +813,9 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, if (WARN_ON(!attach || !attach->dmabuf)) return ERR_PTR(-EINVAL); + if (dma_buf_attachment_is_dynamic(attach)) + dma_resv_assert_held(attach->dmabuf->resv); + if (attach->sgt) { /* * Two mappings with different directions for the same @@ -761,6 +828,9 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, return attach->sgt; } + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_resv_assert_held(attach->dmabuf->resv); + sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction); if (!sg_table) sg_table = ERR_PTR(-ENOMEM); @@ -793,9 +863,15 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, if (WARN_ON(!attach || !attach->dmabuf || !sg_table)) return; + if (dma_buf_attachment_is_dynamic(attach)) + dma_resv_assert_held(attach->dmabuf->resv); + if (attach->sgt == sg_table) return; + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_resv_assert_held(attach->dmabuf->resv); + attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction); } EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment); @@ -1219,10 +1295,12 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused) seq_puts(s, "\tAttached Devices:\n"); attach_count = 0; + dma_resv_lock(buf_obj->resv, NULL); list_for_each_entry(attach_obj, &buf_obj->attachments, node) { seq_printf(s, "\t%s\n", dev_name(attach_obj->dev)); attach_count++; } + dma_resv_unlock(buf_obj->resv); seq_printf(s, "Total %d devices attached\n\n", attach_count); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index ec212cb27fdc..bcc0f4d0b678 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -42,6 +42,18 @@ struct dma_buf_ops { */ bool cache_sgt_mapping; + /** + * @dynamic_mapping: + * + * If true the framework makes sure that the map/unmap_dma_buf + * callbacks are always called with the dma_resv object locked. + * + * If false the framework makes ure that the map/unmap_dma_buf + * callbacks are always called without the dma_resv object locked. + * Mutual exclusive with @cache_sgt_mapping. + */ + bool dynamic_mapping; + /** * @attach: * @@ -109,6 +121,9 @@ struct dma_buf_ops { * any other kind of sharing that the exporter might wish to make * available to buffer-users. * + * This is always called with the dmabuf->resv object locked when + * the dynamic_mapping flag is true. + * * Returns: * * A &sg_table scatter list of or the backing storage of the DMA buffer, @@ -267,7 +282,8 @@ struct dma_buf_ops { * struct dma_buf - shared buffer object * @size: size of the buffer * @file: file pointer used for sharing buffers across, and for refcounting. - * @attachments: list of dma_buf_attachment that denotes all devices attached. + * @attachments: list of dma_buf_attachment that denotes all devices attached, + * protected by dma_resv lock. * @ops: dma_buf_ops associated with this buffer object. * @lock: used internally to serialize list manipulation, attach/detach and * vmap/unmap, and accesses to name @@ -323,10 +339,12 @@ struct dma_buf { * struct dma_buf_attachment - holds device-buffer attachment data * @dmabuf: buffer for this attachment. * @dev: device attached to the buffer. - * @node: list of dma_buf_attachment. + * @node: list of dma_buf_attachment, protected by dma_resv lock of the dmabuf. * @sgt: cached mapping. * @dir: direction of cached mapping. * @priv: exporter specific attachment data. + * @dynamic_mapping: true if dma_buf_map/unmap_attachment() is called with the + * dma_resv lock held. * * This structure holds the attachment information between the dma_buf buffer * and its user device(s). The list contains one attachment struct per device @@ -343,6 +361,7 @@ struct dma_buf_attachment { struct list_head node; struct sg_table *sgt; enum dma_data_direction dir; + bool dynamic_mapping; void *priv; }; @@ -394,10 +413,39 @@ static inline void get_dma_buf(struct dma_buf *dmabuf) get_file(dmabuf->file); } +/** + * dma_buf_is_dynamic - check if a DMA-buf uses dynamic mappings. + * @dmabuf: the DMA-buf to check + * + * Returns true if a DMA-buf exporter wants to be called with the dma_resv + * locked, false if it doesn't wants to be called with the lock held. + */ +static inline bool dma_buf_is_dynamic(struct dma_buf *dmabuf) +{ + return dmabuf->ops->dynamic_mapping; +} + +/** + * dma_buf_attachment_is_dynamic - check if a DMA-buf attachment uses dynamic + * mappinsg + * @attach: the DMA-buf attachment to check + * + * Returns true if a DMA-buf importer wants to call the map/unmap functions with + * the dma_resv lock held. + */ +static inline bool +dma_buf_attachment_is_dynamic(struct dma_buf_attachment *attach) +{ + return attach->dynamic_mapping; +} + struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, - struct device *dev); + struct device *dev); +struct dma_buf_attachment * +dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, + bool dynamic_mapping); void dma_buf_detach(struct dma_buf *dmabuf, - struct dma_buf_attachment *dmabuf_attach); + struct dma_buf_attachment *attach); struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info); @@ -409,6 +457,7 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *, enum dma_data_direction); void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct sg_table *, enum dma_data_direction); +void dma_buf_move_notify(struct dma_buf *dma_buf); int dma_buf_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction dir); int dma_buf_end_cpu_access(struct dma_buf *dma_buf, From patchwork Mon Oct 21 11:15:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_K=C3=B6nig?= X-Patchwork-Id: 11201967 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DAAFD1390 for ; 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Mon, 21 Oct 2019 04:15:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7c5Qzq9KoeAeHZDAZpUJnWCjxxzWTWUy42GlQzoDXV0=; b=ZXRbcThPtQ1P23TsfOsyDwNM+1MDeZ5v2MxtE9RW8N3/cQ1xXY/AavIyW0EasiDOeZ CZL1NnAgxHnwy9y46V4ZgPTHd0dm4Ga2px+V1cTvJ5HeJCR6Kb51tEM6QAT57uYnhmFV YpPLQt0Fkxq2D8gpBr0L46/aMpZhdJxHsv8EUdAoy9pTPYYwVf2k0xsd92Vpxh7OgVw2 ZKR7YJoS+uudhJAsQN/C8pIK7ax3KvHSnhWkr8PzNdF4wjJFPIzIibGcQLQfEjOISg0N f9kTIM4M5Lz9E2Ai1KR5LeAQcrIJ3e+UoZuLT7rmc6V+T+Plp6USb9GtA7AvSQ36EuwS eihw== X-Gm-Message-State: APjAAAVPWkwh+V3PMaMvxlyHLGmL17I7OJm/6v/MxXEAQBL4SqZOEjT9 6e8s+hYPbOc4SjinABQvyo71Mz2L X-Google-Smtp-Source: APXvYqxW81KRS6pTbAx1n00iEXUv6tQFsMzKCBICUSmt+H08oQcDhMvCeGT/1W/4ZZq6o1rbXHhWtQ== X-Received: by 2002:a1c:e912:: with SMTP id q18mr19108187wmc.29.1571656528599; Mon, 21 Oct 2019 04:15:28 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:c194:dd41:4bef:70cc]) by smtp.gmail.com with ESMTPSA id l9sm13152415wme.45.2019.10.21.04.15.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Oct 2019 04:15:28 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: dri-devel@lists.freedesktop.org, sumit.semwal@linaro.org, linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org, daniel@ffwll.ch Subject: [PATCH 2/4] dma-buf: stop using the dmabuf->lock so much Date: Mon, 21 Oct 2019 13:15:22 +0200 Message-Id: <20191021111524.14793-2-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191021111524.14793-1-christian.koenig@amd.com> References: <20191021111524.14793-1-christian.koenig@amd.com> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=7c5Qzq9KoeAeHZDAZpUJnWCjxxzWTWUy42GlQzoDXV0=; b=HSOPmb5Mmgc4EWngj+Xfe3rtVV7heQZosok7UrRHMB33Pd7lRsZqElsgybATdAb1Di 6rzbSIh81Xiz0aLQSg6daozUrYKexTTIXpBjFfJKtyEnwJ1ybuVQE/GirIvb1SlWe89+ dkFS8MMOG4DtJGguTymO7Ewcl/PI60apRJIEkohJp3OkEpLrbhbuPyoIHH1snw+etvPV HWdyu0LyGdOOIYBPHpNbRIf/+eS9aFU71au4MVPyk/mmm8fJuiFHq6ETd960GQGYDWzV nc0o+6UTIDgbo/iIyijmnRyNwdJk7syJ2cJouwk2yf7W/9PoXxDYZi5nFapyHQPIevcQ 6Evw== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The attachment list is now protected by the dma_resv object. So we can drop holding this lock to allow concurrent attach and detach operations. Signed-off-by: Christian König Reviewed-by: Daniel Vetter --- drivers/dma-buf/dma-buf.c | 16 ---------------- 1 file changed, 16 deletions(-) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 753be84b5fd6..c736e67ae1a1 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -685,8 +685,6 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, attach->dmabuf = dmabuf; attach->dynamic_mapping = dynamic_mapping; - mutex_lock(&dmabuf->lock); - if (dmabuf->ops->attach) { ret = dmabuf->ops->attach(dmabuf, attach); if (ret) @@ -696,8 +694,6 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, list_add(&attach->node, &dmabuf->attachments); dma_resv_unlock(dmabuf->resv); - mutex_unlock(&dmabuf->lock); - /* When either the importer or the exporter can't handle dynamic * mappings we cache the mapping here to avoid issues with the * reservation object lock. @@ -726,7 +722,6 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev, err_attach: kfree(attach); - mutex_unlock(&dmabuf->lock); return ERR_PTR(ret); err_unlock: @@ -776,14 +771,12 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach) dma_resv_unlock(attach->dmabuf->resv); } - mutex_lock(&dmabuf->lock); dma_resv_lock(dmabuf->resv, NULL); list_del(&attach->node); dma_resv_unlock(dmabuf->resv); if (dmabuf->ops->detach) dmabuf->ops->detach(dmabuf, attach); - mutex_unlock(&dmabuf->lock); kfree(attach); } EXPORT_SYMBOL_GPL(dma_buf_detach); @@ -1247,14 +1240,6 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused) "size", "flags", "mode", "count", "ino"); list_for_each_entry(buf_obj, &db_list.head, list_node) { - ret = mutex_lock_interruptible(&buf_obj->lock); - - if (ret) { - seq_puts(s, - "\tERROR locking buffer object: skipping\n"); - continue; - } - seq_printf(s, "%08zu\t%08x\t%08x\t%08ld\t%s\t%08lu\t%s\n", buf_obj->size, buf_obj->file->f_flags, buf_obj->file->f_mode, @@ -1307,7 +1292,6 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused) count++; size += buf_obj->size; - mutex_unlock(&buf_obj->lock); } seq_printf(s, "\nTotal %d objects, %zu bytes\n", count, size); From patchwork Mon Oct 21 11:15:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_K=C3=B6nig?= X-Patchwork-Id: 11201969 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BC0701390 for ; Mon, 21 Oct 2019 11:15:40 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A405D206C2 for ; Mon, 21 Oct 2019 11:15:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A405D206C2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A4666890B3; Mon, 21 Oct 2019 11:15:39 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2DEF18907B; Mon, 21 Oct 2019 11:15:31 +0000 (UTC) Received: by mail-wm1-x343.google.com with SMTP id 3so12354170wmi.3; Mon, 21 Oct 2019 04:15:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ieftc5OZzoBpkKERgd4ypTIz03QnzZwqaxbRIvJjQOA=; b=LBSoZw/Z+eOC4tqAA/0ykoftt+ADRLejI1zzPZdp0P2H6QNMRp/sSD0cHZGY2LWc8A TVW2YmEg6ayEvFCMdQAB5IVAsgZVb+pBU8ZuMekvvBYwb4bAo0DDz3lGdyN3481oBPcC rGHA8V9zd0RVrTfeeKUk54vjAPi02fpG57yZQtpNHJgtoonmEAik/0FORk3f4M1YFDHV 3CSNEwwbqefNthMi8PoDklozTNUbnMOW5B771KtCpIdAQcs1h+CmvrlgVky8zmRkn1yP qg7Tw7T17/qjryxm3mqCL0c3NtSCmOHumVLE7eVORP346NeAhV7J/ed2hYv/DQtWzqfB qH8w== X-Gm-Message-State: APjAAAUs8mOjv9SdPshODzHYCLDmoiV308kPrfYuHmui/Lv1e/GDYSID 2ivyXA5Q/P7bOIxnVmXWyrQFLBgU X-Google-Smtp-Source: APXvYqwSWSdNGiq0uG1tH9MYN8Xd9D4kczQWQOq6ynTQEEslg2xeNf2B/6PXeTI1H7YpyAsvyyT+NA== X-Received: by 2002:a1c:5409:: with SMTP id i9mr19173338wmb.120.1571656529411; Mon, 21 Oct 2019 04:15:29 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:c194:dd41:4bef:70cc]) by smtp.gmail.com with ESMTPSA id l9sm13152415wme.45.2019.10.21.04.15.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Oct 2019 04:15:28 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: dri-devel@lists.freedesktop.org, sumit.semwal@linaro.org, linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org, daniel@ffwll.ch Subject: [PATCH 3/4] drm/amdgpu: add independent DMA-buf export v7 Date: Mon, 21 Oct 2019 13:15:23 +0200 Message-Id: <20191021111524.14793-3-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191021111524.14793-1-christian.koenig@amd.com> References: <20191021111524.14793-1-christian.koenig@amd.com> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=ieftc5OZzoBpkKERgd4ypTIz03QnzZwqaxbRIvJjQOA=; b=Ae5csJtRLnGC7zwpq6aSDSObm8rh7TuAvDu9qb1IAYy9vtmg1Apu8P4Qk9iN0EYgAV dcugcJqSOm1lt6s62FFze5yp+eQJDh/rp53bV/qQU6hd/3N06k4hu/HrxbPUjxif1Ppc pQ+WBttoBnU+orm/Mat2Btrwh1FNmfZHIS23DyAjnjhCmaZbh/wrleBViEvuNOL7rgFF kPPgmoX95jknfyziotOSK7wmfVuhjO87wjhFWjHX34WR44iovYpDgF1hAz3VeNInmxWR 3W8lmKtsdK4n7CXximDf8FLIKbXlygygS5Fz6c+ftWlDml8g/u6zkiQAqJ2oj5kVwiuf b++A== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add an DMA-buf export implementation independent of the DRM helpers. This not only avoids the caching of DMA-buf mappings, but also allows us to use the new dynamic locking approach. This is also a prerequisite of unpinned DMA-buf handling. v2: fix unintended recursion, remove debugging leftovers v3: split out from unpinned DMA-buf work v4: rebase on top of new no_sgt_cache flag v5: fix some warnings by including amdgpu_dma_buf.h v6: fix locking for non amdgpu exports v7: rebased on new DMA-buf locking patch Signed-off-by: Christian König --- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 172 +++++++++++--------- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 1 + 4 files changed, 97 insertions(+), 78 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index 61f108ec2b5c..f14b52cc7205 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -34,26 +34,11 @@ #include "amdgpu.h" #include "amdgpu_display.h" #include "amdgpu_gem.h" +#include "amdgpu_dma_buf.h" #include #include #include -/** - * amdgpu_gem_prime_get_sg_table - &drm_driver.gem_prime_get_sg_table - * implementation - * @obj: GEM buffer object (BO) - * - * Returns: - * A scatter/gather table for the pinned pages of the BO's memory. - */ -struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj) -{ - struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - int npages = bo->tbo.num_pages; - - return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); -} - /** * amdgpu_gem_prime_vmap - &dma_buf_ops.vmap implementation * @obj: GEM BO @@ -179,92 +164,126 @@ __dma_resv_make_exclusive(struct dma_resv *obj) } /** - * amdgpu_dma_buf_map_attach - &dma_buf_ops.attach implementation - * @dma_buf: Shared DMA buffer + * amdgpu_dma_buf_attach - &dma_buf_ops.attach implementation + * + * @dmabuf: DMA-buf where we attach to + * @attach: attachment to add + * + * Add the attachment as user to the exported DMA-buf. + */ +static int amdgpu_dma_buf_attach(struct dma_buf *dmabuf, + struct dma_buf_attachment *attach) +{ + struct drm_gem_object *obj = dmabuf->priv; + struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); + int r; + + if (attach->dev->driver == adev->dev->driver) + return 0; + + r = amdgpu_bo_reserve(bo, false); + if (unlikely(r != 0)) + return r; + + /* + * We only create shared fences for internal use, but importers + * of the dmabuf rely on exclusive fences for implicitly + * tracking write hazards. As any of the current fences may + * correspond to a write, we need to convert all existing + * fences on the reservation object into a single exclusive + * fence. + */ + r = __dma_resv_make_exclusive(bo->tbo.base.resv); + if (r) + return r; + + bo->prime_shared_count++; + amdgpu_bo_unreserve(bo); + return 0; +} + +/** + * amdgpu_dma_buf_detach - &dma_buf_ops.detach implementation + * + * @dmabuf: DMA-buf where we remove the attachment from + * @attach: the attachment to remove + * + * Called when an attachment is removed from the DMA-buf. + */ +static void amdgpu_dma_buf_detach(struct dma_buf *dmabuf, + struct dma_buf_attachment *attach) +{ + struct drm_gem_object *obj = dmabuf->priv; + struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); + + if (attach->dev->driver != adev->dev->driver && bo->prime_shared_count) + bo->prime_shared_count--; +} + +/** + * amdgpu_dma_buf_map - &dma_buf_ops.map_dma_buf implementation * @attach: DMA-buf attachment + * @dir: DMA direction * * Makes sure that the shared DMA buffer can be accessed by the target device. * For now, simply pins it to the GTT domain, where it should be accessible by * all DMA devices. * * Returns: - * 0 on success or a negative error code on failure. + * sg_table filled with the DMA addresses to use or ERR_PRT with negative error + * code. */ -static int amdgpu_dma_buf_map_attach(struct dma_buf *dma_buf, - struct dma_buf_attachment *attach) +static struct sg_table *amdgpu_dma_buf_map(struct dma_buf_attachment *attach, + enum dma_data_direction dir) { + struct dma_buf *dma_buf = attach->dmabuf; struct drm_gem_object *obj = dma_buf->priv; struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); + struct sg_table *sgt; long r; - r = drm_gem_map_attach(dma_buf, attach); - if (r) - return r; - - r = amdgpu_bo_reserve(bo, false); - if (unlikely(r != 0)) - goto error_detach; - - - if (attach->dev->driver != adev->dev->driver) { - /* - * We only create shared fences for internal use, but importers - * of the dmabuf rely on exclusive fences for implicitly - * tracking write hazards. As any of the current fences may - * correspond to a write, we need to convert all existing - * fences on the reservation object into a single exclusive - * fence. - */ - r = __dma_resv_make_exclusive(bo->tbo.base.resv); - if (r) - goto error_unreserve; - } - - /* pin buffer into GTT */ r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT); if (r) - goto error_unreserve; + return ERR_PTR(r); - if (attach->dev->driver != adev->dev->driver) - bo->prime_shared_count++; + sgt = drm_prime_pages_to_sg(bo->tbo.ttm->pages, bo->tbo.num_pages); + if (IS_ERR(sgt)) + return sgt; -error_unreserve: - amdgpu_bo_unreserve(bo); + if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir, + DMA_ATTR_SKIP_CPU_SYNC)) + goto error_free; -error_detach: - if (r) - drm_gem_map_detach(dma_buf, attach); - return r; + return sgt; + +error_free: + sg_free_table(sgt); + kfree(sgt); + return ERR_PTR(-ENOMEM); } /** - * amdgpu_dma_buf_map_detach - &dma_buf_ops.detach implementation - * @dma_buf: Shared DMA buffer + * amdgpu_dma_buf_unmap - &dma_buf_ops.unmap_dma_buf implementation * @attach: DMA-buf attachment + * @sgt: sg_table to unmap + * @dir: DMA direction * * This is called when a shared DMA buffer no longer needs to be accessible by * another device. For now, simply unpins the buffer from GTT. */ -static void amdgpu_dma_buf_map_detach(struct dma_buf *dma_buf, - struct dma_buf_attachment *attach) +static void amdgpu_dma_buf_unmap(struct dma_buf_attachment *attach, + struct sg_table *sgt, + enum dma_data_direction dir) { - struct drm_gem_object *obj = dma_buf->priv; + struct drm_gem_object *obj = attach->dmabuf->priv; struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); - int ret = 0; - - ret = amdgpu_bo_reserve(bo, true); - if (unlikely(ret != 0)) - goto error; + dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); + sg_free_table(sgt); + kfree(sgt); amdgpu_bo_unpin(bo); - if (attach->dev->driver != adev->dev->driver && bo->prime_shared_count) - bo->prime_shared_count--; - amdgpu_bo_unreserve(bo); - -error: - drm_gem_map_detach(dma_buf, attach); } /** @@ -308,10 +327,11 @@ static int amdgpu_dma_buf_begin_cpu_access(struct dma_buf *dma_buf, } const struct dma_buf_ops amdgpu_dmabuf_ops = { - .attach = amdgpu_dma_buf_map_attach, - .detach = amdgpu_dma_buf_map_detach, - .map_dma_buf = drm_gem_map_dma_buf, - .unmap_dma_buf = drm_gem_unmap_dma_buf, + .dynamic_mapping = true, + .attach = amdgpu_dma_buf_attach, + .detach = amdgpu_dma_buf_detach, + .map_dma_buf = amdgpu_dma_buf_map, + .unmap_dma_buf = amdgpu_dma_buf_unmap, .release = drm_gem_dmabuf_release, .begin_cpu_access = amdgpu_dma_buf_begin_cpu_access, .mmap = drm_gem_dmabuf_mmap, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h index 5012e6ab58f1..ce1b3f017451 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h @@ -25,7 +25,6 @@ #include -struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object * amdgpu_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 3fae1007143e..bf5bf15b12e3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1409,7 +1409,6 @@ static struct drm_driver kms_driver = { .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_export = amdgpu_gem_prime_export, .gem_prime_import = amdgpu_gem_prime_import, - .gem_prime_get_sg_table = amdgpu_gem_prime_get_sg_table, .gem_prime_import_sg_table = amdgpu_gem_prime_import_sg_table, .gem_prime_vmap = amdgpu_gem_prime_vmap, .gem_prime_vunmap = amdgpu_gem_prime_vunmap, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index 6f0b789a0b49..b319254537b8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -31,6 +31,7 @@ */ #include #include +#include #include #include From patchwork Mon Oct 21 11:15:24 2019 Content-Type: text/plain; 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Mon, 21 Oct 2019 04:15:30 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:c194:dd41:4bef:70cc]) by smtp.gmail.com with ESMTPSA id l9sm13152415wme.45.2019.10.21.04.15.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Oct 2019 04:15:29 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: dri-devel@lists.freedesktop.org, sumit.semwal@linaro.org, linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org, daniel@ffwll.ch Subject: [PATCH 4/4] drm/amdgpu: add independent DMA-buf import v8 Date: Mon, 21 Oct 2019 13:15:24 +0200 Message-Id: <20191021111524.14793-4-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191021111524.14793-1-christian.koenig@amd.com> References: <20191021111524.14793-1-christian.koenig@amd.com> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=R2338DozlAdMup+TC57MqJoEZ6+BquoNGXxiKwrH+70=; b=jy8nh4qHLdIk+aq6S2YEGbPhUk6/hzJxMRd0FjroxEaxmAfXES/CtLkLlP40TsGGfP zJ4DDSLWVXNW/q2FmyvMXGMaOHLaKu/ismUXK7a2bR14ofaGdxBj3fEojjjN+0Kycqbz bZk88eVTH/tTGyoj1g5icRe69BQdDHMZnNtRgceAn1Mi3n217nWWTTmS2AmJdMlSULMj VRUlZnxwdqkFee2MhKiGIzcIhZclYgNodmlH+P6KO9eJg8yzYsj4b/Nfk9yYbD545lus fZI2cEKXBr/HtbR/hwdX/gQtNE4OCF6k/ogOcG6Cr8Ync7+kwd945Xx2O2EnaxHk1U5J UoBw== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Instead of relying on the DRM functions just implement our own import functions. This prepares support for taking care of unpinned DMA-buf. v2: enable for all exporters, not just amdgpu, fix invalidation handling, lock reservation object while setting callback v3: change to new dma_buf attach interface v4: split out from unpinned DMA-buf work v5: rebased and cleanup on new DMA-buf interface v6: squash with invalidation callback change, stop using _(map|unmap)_locked v7: drop invalidations when the BO is already in system domain v8: rebase on new DMA-buf patch and drop move notification Signed-off-by: Christian König --- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 38 +++++++++++++-------- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h | 4 --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 32 ++++++++++++++--- 4 files changed, 50 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index f14b52cc7205..c22d11df013e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -370,31 +370,28 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_gem_object *gobj, } /** - * amdgpu_gem_prime_import_sg_table - &drm_driver.gem_prime_import_sg_table - * implementation + * amdgpu_dma_buf_create_obj - create BO for DMA-buf import + * * @dev: DRM device - * @attach: DMA-buf attachment - * @sg: Scatter/gather table + * @dma_buf: DMA-buf * - * Imports shared DMA buffer memory exported by another device. + * Creates an empty SG BO for DMA-buf import. * * Returns: * A new GEM BO of the given DRM device, representing the memory * described by the given DMA-buf attachment and scatter/gather table. */ -struct drm_gem_object * -amdgpu_gem_prime_import_sg_table(struct drm_device *dev, - struct dma_buf_attachment *attach, - struct sg_table *sg) +static struct drm_gem_object * +amdgpu_dma_buf_create_obj(struct drm_device *dev, struct dma_buf *dma_buf) { - struct dma_resv *resv = attach->dmabuf->resv; + struct dma_resv *resv = dma_buf->resv; struct amdgpu_device *adev = dev->dev_private; struct amdgpu_bo *bo; struct amdgpu_bo_param bp; int ret; memset(&bp, 0, sizeof(bp)); - bp.size = attach->dmabuf->size; + bp.size = dma_buf->size; bp.byte_align = PAGE_SIZE; bp.domain = AMDGPU_GEM_DOMAIN_CPU; bp.flags = 0; @@ -405,11 +402,9 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev, if (ret) goto error; - bo->tbo.sg = sg; - bo->tbo.ttm->sg = sg; bo->allowed_domains = AMDGPU_GEM_DOMAIN_GTT; bo->preferred_domains = AMDGPU_GEM_DOMAIN_GTT; - if (attach->dmabuf->ops != &amdgpu_dmabuf_ops) + if (dma_buf->ops != &amdgpu_dmabuf_ops) bo->prime_shared_count = 1; dma_resv_unlock(resv); @@ -434,6 +429,7 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev, struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf) { + struct dma_buf_attachment *attach; struct drm_gem_object *obj; if (dma_buf->ops == &amdgpu_dmabuf_ops) { @@ -448,5 +444,17 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, } } - return drm_gem_prime_import(dev, dma_buf); + obj = amdgpu_dma_buf_create_obj(dev, dma_buf); + if (IS_ERR(obj)) + return obj; + + attach = dma_buf_dynamic_attach(dma_buf, dev->dev, true); + if (IS_ERR(attach)) { + drm_gem_object_put(obj); + return ERR_CAST(attach); + } + + get_dma_buf(dma_buf); + obj->import_attach = attach; + return obj; } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h index ce1b3f017451..ec447a7b6b28 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h @@ -25,10 +25,6 @@ #include -struct drm_gem_object * -amdgpu_gem_prime_import_sg_table(struct drm_device *dev, - struct dma_buf_attachment *attach, - struct sg_table *sg); struct dma_buf *amdgpu_gem_prime_export(struct drm_gem_object *gobj, int flags); struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index bf5bf15b12e3..7acca058510c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1409,7 +1409,6 @@ static struct drm_driver kms_driver = { .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_export = amdgpu_gem_prime_export, .gem_prime_import = amdgpu_gem_prime_import, - .gem_prime_import_sg_table = amdgpu_gem_prime_import_sg_table, .gem_prime_vmap = amdgpu_gem_prime_vmap, .gem_prime_vunmap = amdgpu_gem_prime_vunmap, .gem_prime_mmap = amdgpu_gem_prime_mmap, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 8e867b8b432f..c19100ced040 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include @@ -763,6 +764,7 @@ static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo, */ struct amdgpu_ttm_tt { struct ttm_dma_tt ttm; + struct drm_gem_object *gobj; u64 offset; uint64_t userptr; struct task_struct *usertask; @@ -1227,6 +1229,7 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo, return NULL; } gtt->ttm.ttm.func = &amdgpu_backend_func; + gtt->gobj = &bo->base; /* allocate space for the uninitialized page entries */ if (ttm_sg_tt_init(>t->ttm, bo, page_flags)) { @@ -1247,7 +1250,6 @@ static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm, { struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev); struct amdgpu_ttm_tt *gtt = (void *)ttm; - bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG); /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */ if (gtt && gtt->userptr) { @@ -1260,7 +1262,19 @@ static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm, return 0; } - if (slave && ttm->sg) { + if (ttm->page_flags & TTM_PAGE_FLAG_SG) { + if (!ttm->sg) { + struct dma_buf_attachment *attach; + struct sg_table *sgt; + + attach = gtt->gobj->import_attach; + sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + if (IS_ERR(sgt)) + return PTR_ERR(sgt); + + ttm->sg = sgt; + } + drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages, gtt->ttm.dma_address, ttm->num_pages); @@ -1287,9 +1301,8 @@ static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm, */ static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm) { - struct amdgpu_device *adev; struct amdgpu_ttm_tt *gtt = (void *)ttm; - bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG); + struct amdgpu_device *adev; if (gtt && gtt->userptr) { amdgpu_ttm_tt_set_user_pages(ttm, NULL); @@ -1298,7 +1311,16 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm) return; } - if (slave) + if (ttm->sg && gtt->gobj->import_attach) { + struct dma_buf_attachment *attach; + + attach = gtt->gobj->import_attach; + dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL); + ttm->sg = NULL; + return; + } + + if (ttm->page_flags & TTM_PAGE_FLAG_SG) return; adev = amdgpu_ttm_adev(ttm->bdev);