From patchwork Mon Jun 17 11:34:08 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: 10998817 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4756076 for ; Mon, 17 Jun 2019 11:34:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 35EAD288C4 for ; Mon, 17 Jun 2019 11:34:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2A178288CF; Mon, 17 Jun 2019 11:34:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2D8D6288C7 for ; Mon, 17 Jun 2019 11:34:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7893B8919A; Mon, 17 Jun 2019 11:34:18 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-wm1-x341.google.com (mail-wm1-x341.google.com [IPv6:2a00:1450:4864:20::341]) by gabe.freedesktop.org (Postfix) with ESMTPS id EA16D89187; Mon, 17 Jun 2019 11:34:16 +0000 (UTC) Received: by mail-wm1-x341.google.com with SMTP id g135so8848565wme.4; Mon, 17 Jun 2019 04:34:16 -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=6vIJVypIdCiKtnMi/GL5XD7d9M7bCA5ys3hvbjLIEWQ=; b=MASISfP168o71goJI3ANGXMPhi4JqjiqzpfH+RNg983hKwc7GsdNDjGOJ8ujTCq0wd sGKm9QN/2CLsM4ZQk3i7wdNQPTpJ1felXa+XSg0aiMQ/JiRRcqOcKqvvKyGXgObgcvcM +xxuYiuzoM4zSfZIuFJX7bfdO24lUNkoH+qoiOy+tdwRcsSVHufj88OwM2Pk3zhDGRvm RKNGF4NBuwD1jtwPtlfRmKbo1H1vtgh4MsbXjeY8SjkZhG3pEXZxawAla8yHAJ6Z5bEF DEdUT90xGkBwtE5GzAfoC3cXeZCUUt5kpMiM/7YFQOTImNjmBBzP+twZiFpuNkbx/pTO H7DQ== X-Gm-Message-State: APjAAAVpiblfkWyY4GD42oU3fkTyJ0Mek9oAiwB8TrOEBCRVL5Tz3OcP 90KFyfavpHgDlOBgU1+m/U7RybAa X-Google-Smtp-Source: APXvYqz0xgeVd7UrSBlvAd1YtI5hoMhQ89i8mcswZ4d8zje3TlEMqOsIQhdidHNmbEDUboBGHGml3w== X-Received: by 2002:a1c:44d7:: with SMTP id r206mr19174712wma.164.1560771255130; Mon, 17 Jun 2019 04:34:15 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:ad86:6268:1a78:d4c]) by smtp.gmail.com with ESMTPSA id s188sm12062110wmf.40.2019.06.17.04.34.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 04:34:14 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org Subject: [PATCH 1/6] dma-buf: add dynamic DMA-buf handling v10 Date: Mon, 17 Jun 2019 13:34:08 +0200 Message-Id: <20190617113413.1869-1-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=6vIJVypIdCiKtnMi/GL5XD7d9M7bCA5ys3hvbjLIEWQ=; b=X6Fj5qT2MB6lcFr3xMo1tNauC65eRl6pl0eSHq7g/gKDWN+tqB640+E4VBVpTRpmz+ sI9ScgEu8+G0hnmR6ozcPtFwWaYlDnXw6iBPl6zwTp0b+zEOpCS6U+XhSeZnov5WIFe6 LcKPVmEPP+46N5xUXrK2flbJgXYwINNQGeMEZ49GOKmdt3FExR/2dLS1OaAaMc/dOrxa MPmiTsY2zO5JHwVKoSBW3qLvVolccpIBrxKCDWWEDFo7cqcFQ1TknweBhBxXVDsEEw/F b7cWPKTzbcJ8BJzBKiKWexCTlYNhqB0QmasEc4pd9LbxR1wvTkdMlCSuPmMo4eA2hFk+ 6rNQ== 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" X-Virus-Scanned: ClamAV using ClamSMTP On the exporter side we add optional explicit pinning callbacks. If those callbacks are implemented the framework no longer caches sg tables and the map/unmap callbacks are always called with the lock of the reservation object held. On the importer side we add an optional invalidate callback. This callback is used by the exporter to inform the importers that their mappings should be destroyed as soon as possible. This allows the exporter to provide the mappings without the need to pin the backing store. v2: don't try to invalidate mappings when the callback is NULL, lock the reservation obj while using the attachments, add helper to set the callback v3: move flag for invalidation support into the DMA-buf, use new attach_info structure to set the callback v4: use importer_priv field instead of mangling exporter priv. v5: drop invalidation_supported flag v6: squash together with pin/unpin changes v7: pin/unpin takes an attachment now v8: nuke dma_buf_attachment_(map|unmap)_locked, everything is now handled backward compatible v9: always cache when export/importer don't agree on dynamic handling v10: minimal style cleanup Signed-off-by: Christian König --- drivers/dma-buf/dma-buf.c | 188 ++++++++++++++++++++++++++++++++++++-- include/linux/dma-buf.h | 109 ++++++++++++++++++++-- 2 files changed, 283 insertions(+), 14 deletions(-) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index a2d34c6b80a5..f756870ba509 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -409,6 +409,9 @@ 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->pin)) + return ERR_PTR(-EINVAL); + if (!try_module_get(exp_info->owner)) return ERR_PTR(-ENOENT); @@ -530,10 +533,12 @@ 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. + * @importer_ops [in] importer operations for the attachment + * @importer_priv [in] importer private pointer for the attachment * * Returns struct dma_buf_attachment pointer for this attachment. Attachments * must be cleaned up by calling dma_buf_detach(). @@ -547,8 +552,10 @@ 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, + const struct dma_buf_attach_ops *importer_ops, + void *importer_priv) { struct dma_buf_attachment *attach; int ret; @@ -562,6 +569,8 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, attach->dev = dev; attach->dmabuf = dmabuf; + attach->importer_ops = importer_ops; + attach->importer_priv = importer_priv; mutex_lock(&dmabuf->lock); @@ -570,16 +579,72 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, if (ret) goto err_attach; } + reservation_object_lock(dmabuf->resv, NULL); list_add(&attach->node, &dmabuf->attachments); + reservation_object_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)) { + reservation_object_lock(attach->dmabuf->resv, NULL); + ret = dma_buf_pin(attach); + if (ret) + goto err_unlock; + } + + 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_unpin; + } + if (dma_buf_is_dynamic(attach->dmabuf)) + reservation_object_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_unpin: + if (dma_buf_is_dynamic(attach->dmabuf)) + dma_buf_unpin(attach); + +err_unlock: + if (dma_buf_is_dynamic(attach->dmabuf)) + reservation_object_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, NULL, NULL); } EXPORT_SYMBOL_GPL(dma_buf_attach); @@ -596,11 +661,22 @@ 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)) + reservation_object_lock(attach->dmabuf->resv, NULL); + dmabuf->ops->unmap_dma_buf(attach, attach->sgt, attach->dir); + if (dma_buf_is_dynamic(attach->dmabuf)) { + dma_buf_unpin(attach); + reservation_object_unlock(attach->dmabuf->resv); + } + } + mutex_lock(&dmabuf->lock); + reservation_object_lock(dmabuf->resv, NULL); list_del(&attach->node); + reservation_object_unlock(dmabuf->resv); if (dmabuf->ops->detach) dmabuf->ops->detach(dmabuf, attach); @@ -609,6 +685,44 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach) } EXPORT_SYMBOL_GPL(dma_buf_detach); +/** + * dma_buf_pin - Lock down the DMA-buf + * + * @attach: [in] attachment which should be pinned + * + * Returns: + * 0 on success, negative error code on failure. + */ +int dma_buf_pin(struct dma_buf_attachment *attach) +{ + struct dma_buf *dmabuf = attach->dmabuf; + int ret = 0; + + reservation_object_assert_held(dmabuf->resv); + + if (dmabuf->ops->pin) + ret = dmabuf->ops->pin(attach); + + return ret; +} +EXPORT_SYMBOL_GPL(dma_buf_pin); + +/** + * dma_buf_unpin - Remove lock from DMA-buf + * + * @attach: [in] attachment which should be unpinned + */ +void dma_buf_unpin(struct dma_buf_attachment *attach) +{ + struct dma_buf *dmabuf = attach->dmabuf; + + reservation_object_assert_held(dmabuf->resv); + + if (dmabuf->ops->unpin) + dmabuf->ops->unpin(attach); +} +EXPORT_SYMBOL_GPL(dma_buf_unpin); + /** * dma_buf_map_attachment - Returns the scatterlist table of the attachment; * mapped into _device_ address space. Is a wrapper for map_dma_buf() of the @@ -628,6 +742,7 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, enum dma_data_direction direction) { struct sg_table *sg_table; + int r; might_sleep(); @@ -646,10 +761,38 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, return attach->sgt; } + if (dma_buf_attachment_is_dynamic(attach)) { + reservation_object_assert_held(attach->dmabuf->resv); + + /* + * Mapping a DMA-buf can trigger its invalidation, prevent + * sending this event to the caller by temporary removing + * this attachment from the list. + */ + list_del(&attach->node); + + } else if (dma_buf_is_dynamic(attach->dmabuf)) { + reservation_object_lock(attach->dmabuf->resv, NULL); + r = dma_buf_pin(attach); + if (r) { + reservation_object_unlock(attach->dmabuf->resv); + return ERR_PTR(r); + } + } + sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction); if (!sg_table) sg_table = ERR_PTR(-ENOMEM); + if (dma_buf_attachment_is_dynamic(attach)) { + list_add(&attach->node, &attach->dmabuf->attachments); + + } else if (dma_buf_is_dynamic(attach->dmabuf)) { + if (IS_ERR(sg_table)) + dma_buf_unpin(attach); + reservation_object_unlock(attach->dmabuf->resv); + } + if (!IS_ERR(sg_table) && attach->dmabuf->ops->cache_sgt_mapping) { attach->sgt = sg_table; attach->dir = direction; @@ -681,10 +824,41 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, if (attach->sgt == sg_table) return; + if (dma_buf_attachment_is_dynamic(attach)) + reservation_object_assert_held(attach->dmabuf->resv); + else if (dma_buf_is_dynamic(attach->dmabuf)) + reservation_object_lock(attach->dmabuf->resv, NULL); + attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction); + + if (dma_buf_is_dynamic(attach->dmabuf) && + !dma_buf_attachment_is_dynamic(attach)) { + dma_buf_unpin(attach); + reservation_object_unlock(attach->dmabuf->resv); + } } EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment); +/** + * dma_buf_invalidate_mappings - invalidate all mappings of this dma_buf + * + * @dmabuf: [in] buffer which mappings should be invalidated + * + * Informs all attachmenst that they need to destroy and recreated all their + * mappings. + */ +void dma_buf_invalidate_mappings(struct dma_buf *dmabuf) +{ + struct dma_buf_attachment *attach; + + reservation_object_assert_held(dmabuf->resv); + + list_for_each_entry(attach, &dmabuf->attachments, node) + if (attach->importer_ops && attach->importer_ops->invalidate) + attach->importer_ops->invalidate(attach); +} +EXPORT_SYMBOL_GPL(dma_buf_invalidate_mappings); + /** * DOC: cpu access * @@ -1097,10 +1271,12 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused) seq_puts(s, "\tAttached Devices:\n"); attach_count = 0; + reservation_object_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++; } + reservation_object_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 45b9767e67ec..90c3193be7a5 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -99,14 +99,40 @@ struct dma_buf_ops { */ void (*detach)(struct dma_buf *, struct dma_buf_attachment *); + /** + * @pin: + * + * This is called by dma_buf_pin and lets the exporter know that the + * DMA-buf can't be moved any more. + * + * This is called with the dmabuf->resv object locked. + * + * This callback is optional. + * + * Returns: + * + * 0 on success, negative error code on failure. + */ + int (*pin)(struct dma_buf_attachment *attach); + + /** + * @unpin: + * + * This is called by dma_buf_unpin and lets the exporter know that the + * DMA-buf can be moved again. + * + * This is called with the dmabuf->resv object locked. + * + * This callback is optional. + */ + void (*unpin)(struct dma_buf_attachment *attach); + /** * @map_dma_buf: * * This is called by dma_buf_map_attachment() and is used to map a * shared &dma_buf into device address space, and it is mandatory. It - * can only be called if @attach has been called successfully. This - * essentially pins the DMA buffer into place, and it cannot be moved - * any more + * can only be called if @attach has been called successfully. * * This call may sleep, e.g. when the backing storage first needs to be * allocated, or moved to a location suitable for all currently attached @@ -127,6 +153,9 @@ 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 pin/unpin callbacks are implemented. + * * Returns: * * A &sg_table scatter list of or the backing storage of the DMA buffer, @@ -144,9 +173,6 @@ struct dma_buf_ops { * * This is called by dma_buf_unmap_attachment() and should unmap and * release the &sg_table allocated in @map_dma_buf, and it is mandatory. - * It should also unpin the backing storage if this is the last mapping - * of the DMA buffer, it the exporter supports backing storage - * migration. */ void (*unmap_dma_buf)(struct dma_buf_attachment *, struct sg_table *, @@ -311,6 +337,35 @@ struct dma_buf { } cb_excl, cb_shared; }; +/** + * struct dma_buf_attach_ops - importer operations for an attachment + * @invalidate: [optional] invalidate all mappings made using this attachment. + * + * Attachment operations implemented by the importer. + */ +struct dma_buf_attach_ops { + /** + * @invalidate: + * + * If the invalidate callback is provided the framework can avoid + * pinning the backing store while mappings exists. + * + * This callback is called with the lock of the reservation object + * associated with the dma_buf held and the mapping function must be + * called with this lock held as well. This makes sure that no mapping + * is created concurrently with an ongoing invalidation. + * + * After the callback all existing mappings are still valid until all + * fences in the dma_bufs reservation object are signaled. After getting an + * invalidation callback all mappings should be destroyed by the importer using + * the normal dma_buf_unmap_attachment() function as soon as possible. + * + * New mappings can be created immediately, but can't be used before the + * exclusive fence in the dma_bufs reservation object is signaled. + */ + void (*invalidate)(struct dma_buf_attachment *attach); +}; + /** * struct dma_buf_attachment - holds device-buffer attachment data * @dmabuf: buffer for this attachment. @@ -319,6 +374,8 @@ struct dma_buf { * @sgt: cached mapping. * @dir: direction of cached mapping. * @priv: exporter specific attachment data. + * @importer_ops: importer operations for this attachment. + * @importer_priv: importer specific attachment data. * * This structure holds the attachment information between the dma_buf buffer * and its user device(s). The list contains one attachment struct per device @@ -336,6 +393,9 @@ struct dma_buf_attachment { struct sg_table *sgt; enum dma_data_direction dir; void *priv; + + const struct dma_buf_attach_ops *importer_ops; + void *importer_priv; }; /** @@ -386,10 +446,42 @@ 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 create dynamic sg table mappings + * for each attachment. False if only a single static sg table should be used. + */ +static inline bool dma_buf_is_dynamic(struct dma_buf *dmabuf) +{ + return !!dmabuf->ops->pin; +} + +/** + * 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 use dynamic sg table mappings and + * calls the map/unmap functions with the reservation object locked. + */ +static inline bool +dma_buf_attachment_is_dynamic(struct dma_buf_attachment *attach) +{ + return attach->importer_ops && attach->importer_ops->invalidate; +} + 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, + const struct dma_buf_attach_ops *importer_ops, + void *importer_priv); void dma_buf_detach(struct dma_buf *dmabuf, - struct dma_buf_attachment *dmabuf_attach); + struct dma_buf_attachment *attach); +int dma_buf_pin(struct dma_buf_attachment *attach); +void dma_buf_unpin(struct dma_buf_attachment *attach); struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info); @@ -401,6 +493,7 @@ 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_invalidate_mappings(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 Jun 17 11:34:09 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: 10998825 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7CFA314BB for ; 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Signed-off-by: Christian König --- drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index c7de667d482a..682a1a035b35 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1240,6 +1240,18 @@ int ttm_bo_validate(struct ttm_buffer_object *bo, uint32_t new_flags; reservation_object_assert_held(bo->resv); + + /* + * Remove the backing store if no placement is given. + */ + if (!placement->num_placement && !placement->num_busy_placement) { + ret = ttm_bo_pipeline_gutting(bo); + if (ret) + return ret; + + return ttm_tt_create(bo, false); + } + /* * Check whether we need to move buffer. */ From patchwork Mon Jun 17 11:34:10 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: 10998823 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 14C6D76 for ; 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Mon, 17 Jun 2019 04:34:16 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:ad86:6268:1a78:d4c]) by smtp.gmail.com with ESMTPSA id s188sm12062110wmf.40.2019.06.17.04.34.15 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 04:34:16 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org Subject: [PATCH 3/6] drm/ttm: use the parent resv for ghost objects v2 Date: Mon, 17 Jun 2019 13:34:10 +0200 Message-Id: <20190617113413.1869-3-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190617113413.1869-1-christian.koenig@amd.com> References: <20190617113413.1869-1-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; 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This fixes another OOM problem. Signed-off-by: Christian König --- drivers/gpu/drm/ttm/ttm_bo_util.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index 895d77d799e4..95f47d685921 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -517,9 +517,11 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, kref_init(&fbo->base.kref); fbo->base.destroy = &ttm_transfered_destroy; fbo->base.acc_size = 0; - fbo->base.resv = &fbo->base.ttm_resv; - reservation_object_init(fbo->base.resv); - ret = reservation_object_trylock(fbo->base.resv); + if (bo->resv == &bo->ttm_resv) + fbo->base.resv = &fbo->base.ttm_resv; + + reservation_object_init(&fbo->base.ttm_resv); + ret = reservation_object_trylock(&fbo->base.ttm_resv); WARN_ON(!ret); *new_obj = &fbo->base; @@ -716,7 +718,7 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, if (ret) return ret; - reservation_object_add_excl_fence(ghost_obj->resv, fence); + reservation_object_add_excl_fence(&ghost_obj->ttm_resv, fence); /** * If we're not moving to fixed memory, the TTM object @@ -729,7 +731,7 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, else bo->ttm = NULL; - ttm_bo_unreserve(ghost_obj); + reservation_object_unlock(&ghost_obj->ttm_resv); ttm_bo_put(ghost_obj); } @@ -772,7 +774,7 @@ int ttm_bo_pipeline_move(struct ttm_buffer_object *bo, if (ret) return ret; - reservation_object_add_excl_fence(ghost_obj->resv, fence); + reservation_object_add_excl_fence(&ghost_obj->ttm_resv, fence); /** * If we're not moving to fixed memory, the TTM object @@ -785,7 +787,7 @@ int ttm_bo_pipeline_move(struct ttm_buffer_object *bo, else bo->ttm = NULL; - ttm_bo_unreserve(ghost_obj); + reservation_object_unlock(&ghost_obj->ttm_resv); ttm_bo_put(ghost_obj); } else if (from->flags & TTM_MEMTYPE_FLAG_FIXED) { @@ -841,7 +843,7 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo) if (ret) return ret; - ret = reservation_object_copy_fences(ghost->resv, bo->resv); + ret = reservation_object_copy_fences(&ghost->ttm_resv, bo->resv); /* Last resort, wait for the BO to be idle when we are OOM */ if (ret) ttm_bo_wait(bo, false, false); @@ -850,7 +852,7 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo) bo->mem.mem_type = TTM_PL_SYSTEM; bo->ttm = NULL; - ttm_bo_unreserve(ghost); + reservation_object_unlock(&ghost->ttm_resv); ttm_bo_put(ghost); return 0; From patchwork Mon Jun 17 11:34:11 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: 10998831 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 166DA14DB for ; Mon, 17 Jun 2019 11:34:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 071DA28517 for ; Mon, 17 Jun 2019 11:34:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EFB9F288DA; 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Mon, 17 Jun 2019 04:34:17 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:ad86:6268:1a78:d4c]) by smtp.gmail.com with ESMTPSA id s188sm12062110wmf.40.2019.06.17.04.34.16 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 04:34:17 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org Subject: [PATCH 4/6] drm/amdgpu: use allowed_domains for exported DMA-bufs Date: Mon, 17 Jun 2019 13:34:11 +0200 Message-Id: <20190617113413.1869-4-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190617113413.1869-1-christian.koenig@amd.com> References: <20190617113413.1869-1-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=p9wRG1vgieI5Tw7lzVfOuELR6Jdrkf3meS0vFGCuHyY=; b=oNiUEkrrV9YlMEhpbW5P79n6wtNM+jJlv9k/3TzAAX7UJ27q8K2D43pECXalzjWL7U lGgzYRdhyBa4+VjEr988meUJhqJTOQgac+fFv5m2xxEUQ4lnf4ohWYCPbvNVOYJz+eMn dbEX9gHrSTpVWgovEbjbI4VmtXZzb0mTvhBfix3XGh+hzYe5icQM76S5xUq/e7dCsHSj Jib7oocQLBqmQILbcwrgOYPbGWwIekWBvexSmWU63rjtikg26kz/yXZQwJbMcWQPKHNM hDVT1RSDIkJdoym+5qJrI63E7mRoUobbgnxG2Dx7kzH9ew48A5oNQp4zY4ZSExQVq1IG ftjg== 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" X-Virus-Scanned: ClamAV using ClamSMTP Avoid that we ping/pong the buffers when we stop to pin DMA-buf exports by using the allowed domains for exported buffers. Signed-off-by: Christian König --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 3e2da24cd17a..a59780654335 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -26,6 +26,7 @@ */ #include #include +#include #include #include #include @@ -412,7 +413,9 @@ static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p, /* Don't move this buffer if we have depleted our allowance * to move it. Don't move anything if the threshold is zero. */ - if (p->bytes_moved < p->bytes_moved_threshold) { + if (p->bytes_moved < p->bytes_moved_threshold && + (!bo->gem_base.dma_buf || + list_empty(&bo->gem_base.dma_buf->attachments))) { if (!amdgpu_gmc_vram_full_visible(&adev->gmc) && (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)) { /* And don't move a CPU_ACCESS_REQUIRED BO to limited From patchwork Mon Jun 17 11:34:12 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: 10998833 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7011814DB for ; Mon, 17 Jun 2019 11:34:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 608BF28517 for ; Mon, 17 Jun 2019 11:34:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5469E288D8; 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Mon, 17 Jun 2019 04:34:18 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:ad86:6268:1a78:d4c]) by smtp.gmail.com with ESMTPSA id s188sm12062110wmf.40.2019.06.17.04.34.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 04:34:17 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org Subject: [PATCH 5/6] drm/amdgpu: add independent DMA-buf export v6 Date: Mon, 17 Jun 2019 13:34:12 +0200 Message-Id: <20190617113413.1869-5-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190617113413.1869-1-christian.koenig@amd.com> References: <20190617113413.1869-1-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=SwSa/taZX4dhF66Ew0QZbans2cD/oDfMU7nI2ZvZZME=; b=FGwtsUCQuvGM0tS5zAILXh/gXdsjZbgUOoNGcdHEt7kogZqy11M7HjaLLrQjNg95Yg 2XPn7F8gtQw7AZyBeo2vKsXzp+tpHtvHhcPV2AjKAVayv6YGt0cNDXZT0MORD8hjXTxy n0NJYnzQ6Zfwd4ZoFn3IAoNcbAG3ZSzzGF707OdUlJ/U+NfFf7jPexHeWgCDS3qByLrk opMcA1yCxGxgl2m03wnwsfO11kBImHt2oFC0zaZSGeaPM24i4rRRhb5V75HYzqHYzQBz ktJ1oxArko633VpRmK3NWbtqu3pTyb0tRjRAPXGO1CN26PmqMmLfRsN0TjfEmTS/jqGy sqGQ== 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" X-Virus-Scanned: ClamAV using ClamSMTP The caching of SGT's is actually quite harmful and should probably removed altogether when all drivers are audited. Start by providing a separate DMA-buf export implementation in amdgpu. 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 Signed-off-by: Christian König --- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 210 +++++++++++++------- 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 | 5 + 4 files changed, 139 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 4711cf1b5bd2..30984773ae79 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -36,26 +36,11 @@ #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 @@ -181,92 +166,163 @@ __reservation_object_make_exclusive(struct reservation_object *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 = __reservation_object_make_exclusive(bo->tbo.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_pin - &dma_buf_ops.pin implementation + * + * @attach: attachment to pin down + * + * Pin the BO which is backing the DMA-buf so that it can't move any more. + */ +static int amdgpu_dma_buf_pin(struct dma_buf_attachment *attach) +{ + struct drm_gem_object *obj = attach->dmabuf->priv; + struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + + /* pin buffer into GTT */ + return amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT); +} + +/** + * amdgpu_dma_buf_unpin - &dma_buf_ops.unpin implementation + * + * @attach: attachment to unpin + * + * Unpin a previously pinned BO to make it movable again. + */ +static void amdgpu_dma_buf_unpin(struct dma_buf_attachment *attach) +{ + struct drm_gem_object *obj = attach->dmabuf->priv; + struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + + amdgpu_bo_unpin(bo); +} + +/** + * amdgpu_dma_buf_map_dma_buf - &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_dma_buf(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; + if (!bo->pin_count) { + /* move buffer into GTT */ + struct ttm_operation_ctx ctx = { false, false }; - 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 = __reservation_object_make_exclusive(bo->tbo.resv); + amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT); + r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); if (r) - goto error_unreserve; + return ERR_PTR(r); } - /* pin buffer into GTT */ - r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT); - if (r) - goto error_unreserve; + sgt = drm_prime_pages_to_sg(bo->tbo.ttm->pages, bo->tbo.num_pages); + if (IS_ERR(sgt)) + return sgt; - if (attach->dev->driver != adev->dev->driver) - bo->prime_shared_count++; + if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir, + DMA_ATTR_SKIP_CPU_SYNC)) + goto error_free; -error_unreserve: - amdgpu_bo_unreserve(bo); + return sgt; -error_detach: - if (r) - drm_gem_map_detach(dma_buf, attach); - return r; +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_gem_unmap_dma_buf - &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_dma_buf(struct dma_buf_attachment *attach, + struct sg_table *sgt, + enum dma_data_direction dir) { - 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); - int ret = 0; - - ret = amdgpu_bo_reserve(bo, true); - if (unlikely(ret != 0)) - goto error; + if (!sgt) + return; - 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); + dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); + sg_free_table(sgt); + kfree(sgt); } /** @@ -324,10 +380,12 @@ 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, + .attach = amdgpu_dma_buf_attach, + .detach = amdgpu_dma_buf_detach, + .pin = amdgpu_dma_buf_pin, + .unpin = amdgpu_dma_buf_unpin, + .map_dma_buf = amdgpu_dma_buf_map_dma_buf, + .unmap_dma_buf = amdgpu_dma_buf_unmap_dma_buf, .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 c7056cbe8685..f1522292814c 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 1f38d6fc1fe3..0e9fe121df90 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1333,7 +1333,6 @@ static struct drm_driver kms_driver = { .gem_prime_export = amdgpu_gem_prime_export, .gem_prime_import = amdgpu_gem_prime_import, .gem_prime_res_obj = amdgpu_gem_prime_res_obj, - .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 30493429851e..afde06947ff4 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 #include @@ -1198,6 +1199,10 @@ void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, amdgpu_bo_kunmap(abo); + if (abo->gem_base.dma_buf && !abo->gem_base.import_attach && + bo->mem.mem_type != TTM_PL_SYSTEM) + dma_buf_invalidate_mappings(abo->gem_base.dma_buf); + /* remember the eviction */ if (evict) atomic64_inc(&adev->num_evictions); From patchwork Mon Jun 17 11:34:13 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: 10998835 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 767CA14BB for ; Mon, 17 Jun 2019 11:34:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 65B4E285DB for ; Mon, 17 Jun 2019 11:34:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5A5CD288CF; Mon, 17 Jun 2019 11:34:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5A813285DB for ; 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Mon, 17 Jun 2019 04:34:18 -0700 (PDT) Received: from abel.fritz.box ([2a02:908:1252:fb60:ad86:6268:1a78:d4c]) by smtp.gmail.com with ESMTPSA id s188sm12062110wmf.40.2019.06.17.04.34.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 04:34:18 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org Subject: [PATCH 6/6] drm/amdgpu: add independent DMA-buf import v6 Date: Mon, 17 Jun 2019 13:34:13 +0200 Message-Id: <20190617113413.1869-6-christian.koenig@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190617113413.1869-1-christian.koenig@amd.com> References: <20190617113413.1869-1-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=t0Lfx2H84nn2nI1K0soJLj8BZNQI+KpcOxSIABnB00E=; b=T1kS8yifaoPt4KfOcLlPoVpPfjXN3dNM+6/PbZqPzNZD1d8Y86XRRBtiVu2Wi+74Jt EvjNg7XcOjEzUoMVpfouBL0Qw3Zjq8u6BC2ekYtky+s2TdqaZpi7tZ4XMs6Y9+ajRISb BE3pfXA6OLBgBp4u4ai0kwhKOFdQJDcDSwHR3ifxySUS2EjCkSjgkmAIqQgtB4T/CNxt f8T0F/U/b8bZX+GxbT3QuroSybaN+4Tqd+S6xHIic6wfm+fYMZaI9oNwHPiqQX33oKzg B1r6SczCn5+y63UhEPEsrCW+VtzDqRGt+Q1lTAF7eZMBww4ARP93L6ZS8x8E3VU0UtQC /Tbg== 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" X-Virus-Scanned: ClamAV using ClamSMTP 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 Signed-off-by: Christian König --- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 65 ++++++++++++++++----- 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_object.c | 6 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 32 ++++++++-- 5 files changed, 83 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 30984773ae79..1a81eb1ed9a7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -426,31 +426,28 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev, } /** - * 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 reservation_object *resv = attach->dmabuf->resv; + struct reservation_object *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; @@ -461,11 +458,9 @@ 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; ww_mutex_unlock(&resv->lock); @@ -476,6 +471,32 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev, return ERR_PTR(ret); } +/** + * amdgpu_gem_prime_invalidate_mappings - &attach.invalidate implementation + * + * @attach: the DMA-buf attachment + * + * Invalidate the DMA-buf attachment, making sure that the we re-create the + * mapping before the next use. + */ +static void +amdgpu_gem_prime_invalidate_mappings(struct dma_buf_attachment *attach) +{ + struct ttm_operation_ctx ctx = { false, false }; + struct drm_gem_object *obj = attach->importer_priv; + struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + struct ttm_placement placement = {}; + int r; + + r = ttm_bo_validate(&bo->tbo, &placement, &ctx); + if (r) + DRM_ERROR("Failed to invalidate DMA-buf import (%d))\n", r); +} + +static const struct dma_buf_attach_ops amdgpu_dma_buf_attach_ops = { + .invalidate = amdgpu_gem_prime_invalidate_mappings +}; + /** * amdgpu_gem_prime_import - &drm_driver.gem_prime_import implementation * @dev: DRM device @@ -490,6 +511,7 @@ 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) { @@ -504,5 +526,18 @@ 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, + &amdgpu_dma_buf_attach_ops, obj); + 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 f1522292814c..2765413770b9 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_device *dev, struct drm_gem_object *gobj, int flags); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 0e9fe121df90..9d6dd1853c3c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1333,7 +1333,6 @@ static struct drm_driver kms_driver = { .gem_prime_export = amdgpu_gem_prime_export, .gem_prime_import = amdgpu_gem_prime_import, .gem_prime_res_obj = amdgpu_gem_prime_res_obj, - .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_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index afde06947ff4..4bb1256dd980 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -854,6 +854,9 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain, return 0; } + if (bo->gem_base.import_attach) + dma_buf_pin(bo->gem_base.import_attach); + bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS; /* force to pin into visible video ram */ if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) @@ -937,6 +940,9 @@ int amdgpu_bo_unpin(struct amdgpu_bo *bo) amdgpu_bo_subtract_pin_size(bo); + if (bo->gem_base.import_attach) + dma_buf_unpin(bo->gem_base.import_attach); + for (i = 0; i < bo->placement.num_placement; i++) { bo->placements[i].lpfn = 0; bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 7138dc1dd1f4..f8d9f3779f76 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -44,6 +44,7 @@ #include #include #include +#include #include "amdgpu.h" #include "amdgpu_object.h" #include "amdgpu_trace.h" @@ -706,6 +707,7 @@ 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; @@ -1193,6 +1195,7 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo, return NULL; } gtt->ttm.ttm.func = &amdgpu_backend_func; + gtt->gobj = &ttm_to_amdgpu_bo(bo)->gem_base; /* allocate space for the uninitialized page entries */ if (ttm_sg_tt_init(>t->ttm, bo, page_flags)) { @@ -1213,7 +1216,6 @@ 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) { @@ -1226,7 +1228,19 @@ 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); @@ -1253,9 +1267,8 @@ 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); @@ -1264,7 +1277,16 @@ 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);