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From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
	daniel@ffwll.ch
Subject: [PATCH 1/6] dma-buf: add peer2peer flag
Date: Mon, 30 Mar 2020 15:55:31 +0200	[thread overview]
Message-ID: <20200330135536.2997-1-christian.koenig@amd.com> (raw)

Add a peer2peer flag noting that the importer can deal with device
resources which are not backed by pages.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/dma-buf/dma-buf.c |  2 ++
 include/linux/dma-buf.h   | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index ccc9eda1bc28..570c923023e6 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -690,6 +690,8 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev,
 
 	attach->dev = dev;
 	attach->dmabuf = dmabuf;
+	if (importer_ops)
+		attach->peer2peer = importer_ops->allow_peer2peer;
 	attach->importer_ops = importer_ops;
 	attach->importer_priv = importer_priv;
 
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 1ade486fc2bb..82e0a4a64601 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -334,6 +334,14 @@ struct dma_buf {
  * Attachment operations implemented by the importer.
  */
 struct dma_buf_attach_ops {
+	/**
+	 * @allow_peer2peer:
+	 *
+	 * If this is set to true the importer must be able to handle peer
+	 * resources without struct pages.
+	 */
+	bool allow_peer2peer;
+
 	/**
 	 * @move_notify
 	 *
@@ -362,6 +370,7 @@ struct dma_buf_attach_ops {
  * @node: list of dma_buf_attachment, protected by dma_resv lock of the dmabuf.
  * @sgt: cached mapping.
  * @dir: direction of cached mapping.
+ * @peer2peer: true if the importer can handle peer resources without pages.
  * @priv: exporter specific attachment data.
  * @importer_ops: importer operations for this attachment, if provided
  * dma_buf_map/unmap_attachment() must be called with the dma_resv lock held.
@@ -382,6 +391,7 @@ struct dma_buf_attachment {
 	struct list_head node;
 	struct sg_table *sgt;
 	enum dma_data_direction dir;
+	bool peer2peer;
 	const struct dma_buf_attach_ops *importer_ops;
 	void *importer_priv;
 	void *priv;
-- 
2.17.1

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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

WARNING: multiple messages have this Message-ID (diff)
From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
	daniel@ffwll.ch
Subject: [PATCH 1/6] dma-buf: add peer2peer flag
Date: Mon, 30 Mar 2020 15:55:31 +0200	[thread overview]
Message-ID: <20200330135536.2997-1-christian.koenig@amd.com> (raw)

Add a peer2peer flag noting that the importer can deal with device
resources which are not backed by pages.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/dma-buf/dma-buf.c |  2 ++
 include/linux/dma-buf.h   | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index ccc9eda1bc28..570c923023e6 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -690,6 +690,8 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev,
 
 	attach->dev = dev;
 	attach->dmabuf = dmabuf;
+	if (importer_ops)
+		attach->peer2peer = importer_ops->allow_peer2peer;
 	attach->importer_ops = importer_ops;
 	attach->importer_priv = importer_priv;
 
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 1ade486fc2bb..82e0a4a64601 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -334,6 +334,14 @@ struct dma_buf {
  * Attachment operations implemented by the importer.
  */
 struct dma_buf_attach_ops {
+	/**
+	 * @allow_peer2peer:
+	 *
+	 * If this is set to true the importer must be able to handle peer
+	 * resources without struct pages.
+	 */
+	bool allow_peer2peer;
+
 	/**
 	 * @move_notify
 	 *
@@ -362,6 +370,7 @@ struct dma_buf_attach_ops {
  * @node: list of dma_buf_attachment, protected by dma_resv lock of the dmabuf.
  * @sgt: cached mapping.
  * @dir: direction of cached mapping.
+ * @peer2peer: true if the importer can handle peer resources without pages.
  * @priv: exporter specific attachment data.
  * @importer_ops: importer operations for this attachment, if provided
  * dma_buf_map/unmap_attachment() must be called with the dma_resv lock held.
@@ -382,6 +391,7 @@ struct dma_buf_attachment {
 	struct list_head node;
 	struct sg_table *sgt;
 	enum dma_data_direction dir;
+	bool peer2peer;
 	const struct dma_buf_attach_ops *importer_ops;
 	void *importer_priv;
 	void *priv;
-- 
2.17.1

_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

             reply	other threads:[~2020-03-30 13:55 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-30 13:55 Christian König [this message]
2020-03-30 13:55 ` [PATCH 1/6] dma-buf: add peer2peer flag Christian König
2020-03-30 13:55 ` [PATCH 2/6] drm/ttm: lock resv object during destruction Christian König
2020-03-30 13:55   ` Christian König
2020-03-30 13:55 ` [PATCH 3/6] drm/amdgpu: note that we can handle peer2peer DMA-buf Christian König
2020-03-30 13:55   ` Christian König
2020-03-30 13:55 ` [PATCH 4/6] drm/amdgpu: add checks if DMA-buf P2P is supported Christian König
2020-03-30 13:55   ` Christian König
2020-03-30 13:55 ` [PATCH 5/6] drm/amdgpu: add support for exporting VRAM using DMA-buf v3 Christian König
2020-03-30 13:55   ` Christian König
2020-03-30 13:55 ` [PATCH 6/6] drm/amdgpu: improve amdgpu_gem_info debugfs file Christian König
2020-03-30 13:55   ` Christian König
2020-03-31  8:46 ` [PATCH 1/6] dma-buf: add peer2peer flag Daniel Vetter
2020-03-31  8:46   ` Daniel Vetter
2020-04-01  2:39   ` Sumit Semwal
2020-04-01  2:39     ` Sumit Semwal
2020-04-01 11:34 ` Daniel Vetter
2020-04-01 11:34   ` Daniel Vetter
2020-04-01 16:04   ` Ruhl, Michael J
2020-04-01 16:04     ` Ruhl, Michael J
2020-04-03  8:32     ` Daniel Vetter
2020-04-03  8:32       ` Daniel Vetter

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