[PATCH 1/5] dma-buf: use parameter structure for dma_buf_attach

[PATCH 1/5] dma-buf: use parameter structure for dma_buf_attach

[Christian König]

Move the parameters into a structure to make it simpler to extend it in
follow up patches.

This also adds the importer private as parameter so that we can directly
work with a completely filled in attachment structure.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/dma-buf/dma-buf.c                             | 15 ++++++++-------
 drivers/gpu/drm/armada/armada_gem.c                   |  6 +++++-
 drivers/gpu/drm/drm_prime.c                           |  6 +++++-
 drivers/gpu/drm/i915/i915_gem_dmabuf.c                |  6 +++++-
 drivers/gpu/drm/tegra/gem.c                           |  6 +++++-
 drivers/gpu/drm/udl/udl_dmabuf.c                      |  6 +++++-
 drivers/media/common/videobuf2/videobuf2-dma-contig.c |  6 +++++-
 drivers/media/common/videobuf2/videobuf2-dma-sg.c     |  6 +++++-
 drivers/staging/media/tegra-vde/tegra-vde.c           |  6 +++++-
 include/linux/dma-buf.h                               | 17 +++++++++++++++--
 10 files changed, 63 insertions(+), 17 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index d78d5fc173dc..4b46982c6d9c 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -534,8 +534,9 @@ EXPORT_SYMBOL_GPL(dma_buf_put);
 /**
  * dma_buf_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.
+ * @info:	[in]	holds all the attach related information provided
+ *			by the importer. see &struct dma_buf_attach_info
+ *			for further details.
  *
  * Returns struct dma_buf_attachment pointer for this attachment. Attachments
  * must be cleaned up by calling dma_buf_detach().
@@ -549,26 +550,26 @@ 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_attach(const struct dma_buf_attach_info *info)
 {
+	struct dma_buf *dmabuf = info->dmabuf;
 	struct dma_buf_attachment *attach;
 	int ret;
 
-	if (WARN_ON(!dmabuf || !dev))
+	if (WARN_ON(!dmabuf || !info->dev))
 		return ERR_PTR(-EINVAL);
 
 	attach = kzalloc(sizeof(*attach), GFP_KERNEL);
 	if (!attach)
 		return ERR_PTR(-ENOMEM);
 
-	attach->dev = dev;
+	attach->dev = info->dev;
 	attach->dmabuf = dmabuf;
 
 	mutex_lock(&dmabuf->lock);
 
 	if (dmabuf->ops->attach) {
-		ret = dmabuf->ops->attach(dmabuf, dev, attach);
+		ret = dmabuf->ops->attach(dmabuf, info->dev, attach);
 		if (ret)
 			goto err_attach;
 	}
diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c
index a97f509743a5..f4d1c11f57ea 100644
--- a/drivers/gpu/drm/armada/armada_gem.c
+++ b/drivers/gpu/drm/armada/armada_gem.c
@@ -514,6 +514,10 @@ armada_gem_prime_export(struct drm_device *dev, struct drm_gem_object *obj,
 struct drm_gem_object *
 armada_gem_prime_import(struct drm_device *dev, struct dma_buf *buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = buf
+	};
 	struct dma_buf_attachment *attach;
 	struct armada_gem_object *dobj;
 
@@ -529,7 +533,7 @@ armada_gem_prime_import(struct drm_device *dev, struct dma_buf *buf)
 		}
 	}
 
-	attach = dma_buf_attach(buf, dev->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach))
 		return ERR_CAST(attach);
 
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 7856a9b3f8a8..4da242de51c2 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -707,6 +707,10 @@ struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
 					    struct dma_buf *dma_buf,
 					    struct device *attach_dev)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = attach_dev,
+		.dmabuf = dma_buf
+	};
 	struct dma_buf_attachment *attach;
 	struct sg_table *sgt;
 	struct drm_gem_object *obj;
@@ -727,7 +731,7 @@ struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
 	if (!dev->driver->gem_prime_import_sg_table)
 		return ERR_PTR(-EINVAL);
 
-	attach = dma_buf_attach(dma_buf, attach_dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach))
 		return ERR_CAST(attach);
 
diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index 69a7aec49e84..7b737a883106 100644
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -288,6 +288,10 @@ static const struct drm_i915_gem_object_ops i915_gem_object_dmabuf_ops = {
 struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
 					     struct dma_buf *dma_buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = dma_buf
+	};
 	struct dma_buf_attachment *attach;
 	struct drm_i915_gem_object *obj;
 	int ret;
@@ -306,7 +310,7 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
 	}
 
 	/* need to attach */
-	attach = dma_buf_attach(dma_buf, dev->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach))
 		return ERR_CAST(attach);
 
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 8b0b4ff64bb4..1f2bee91e0ad 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -332,6 +332,10 @@ struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
 static struct tegra_bo *tegra_bo_import(struct drm_device *drm,
 					struct dma_buf *buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = drm->dev,
+		.dmabuf = buf
+	};
 	struct tegra_drm *tegra = drm->dev_private;
 	struct dma_buf_attachment *attach;
 	struct tegra_bo *bo;
@@ -341,7 +345,7 @@ static struct tegra_bo *tegra_bo_import(struct drm_device *drm,
 	if (IS_ERR(bo))
 		return bo;
 
-	attach = dma_buf_attach(buf, drm->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach)) {
 		err = PTR_ERR(attach);
 		goto free;
diff --git a/drivers/gpu/drm/udl/udl_dmabuf.c b/drivers/gpu/drm/udl/udl_dmabuf.c
index 2867ed155ff6..c4db84abe231 100644
--- a/drivers/gpu/drm/udl/udl_dmabuf.c
+++ b/drivers/gpu/drm/udl/udl_dmabuf.c
@@ -243,6 +243,10 @@ static int udl_prime_create(struct drm_device *dev,
 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 				struct dma_buf *dma_buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = dma_buf
+	};
 	struct dma_buf_attachment *attach;
 	struct sg_table *sg;
 	struct udl_gem_object *uobj;
@@ -250,7 +254,7 @@ struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 
 	/* need to attach */
 	get_device(dev->dev);
-	attach = dma_buf_attach(dma_buf, dev->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach)) {
 		put_device(dev->dev);
 		return ERR_CAST(attach);
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
index f1178f6f434d..93bd1f40f756 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
@@ -677,6 +677,10 @@ static void vb2_dc_detach_dmabuf(void *mem_priv)
 static void *vb2_dc_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 	unsigned long size, enum dma_data_direction dma_dir)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev,
+		.dmabuf = dbuf
+	};
 	struct vb2_dc_buf *buf;
 	struct dma_buf_attachment *dba;
 
@@ -692,7 +696,7 @@ static void *vb2_dc_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 
 	buf->dev = dev;
 	/* create attachment for the dmabuf with the user device */
-	dba = dma_buf_attach(dbuf, buf->dev);
+	dba = dma_buf_attach(&attach_info);
 	if (IS_ERR(dba)) {
 		pr_err("failed to attach dmabuf\n");
 		kfree(buf);
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 753ed3138dcc..4e61050ba87f 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -609,6 +609,10 @@ static void vb2_dma_sg_detach_dmabuf(void *mem_priv)
 static void *vb2_dma_sg_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 	unsigned long size, enum dma_data_direction dma_dir)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev,
+		.dmabuf = dbuf
+	};
 	struct vb2_dma_sg_buf *buf;
 	struct dma_buf_attachment *dba;
 
@@ -624,7 +628,7 @@ static void *vb2_dma_sg_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 
 	buf->dev = dev;
 	/* create attachment for the dmabuf with the user device */
-	dba = dma_buf_attach(dbuf, buf->dev);
+	dba = dma_buf_attach(&attach_info);
 	if (IS_ERR(dba)) {
 		pr_err("failed to attach dmabuf\n");
 		kfree(buf);
diff --git a/drivers/staging/media/tegra-vde/tegra-vde.c b/drivers/staging/media/tegra-vde/tegra-vde.c
index c47659e96089..25d112443b0d 100644
--- a/drivers/staging/media/tegra-vde/tegra-vde.c
+++ b/drivers/staging/media/tegra-vde/tegra-vde.c
@@ -529,6 +529,10 @@ static int tegra_vde_attach_dmabuf(struct device *dev,
 				   size_t *size,
 				   enum dma_data_direction dma_dir)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev,
+		.dmabuf = dmabuf
+	};
 	struct dma_buf_attachment *attachment;
 	struct dma_buf *dmabuf;
 	struct sg_table *sgt;
@@ -547,7 +551,7 @@ static int tegra_vde_attach_dmabuf(struct device *dev,
 		return -EINVAL;
 	}
 
-	attachment = dma_buf_attach(dmabuf, dev);
+	attachment = dma_buf_attach(&attach_info);
 	if (IS_ERR(attachment)) {
 		dev_err(dev, "Failed to attach dmabuf\n");
 		err = PTR_ERR(attachment);
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 085db2fee2d7..414b4dde5eb7 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -362,6 +362,19 @@ struct dma_buf_export_info {
 	struct dma_buf_export_info name = { .exp_name = KBUILD_MODNAME, \
 					 .owner = THIS_MODULE }
 
+/**
+ * struct dma_buf_attach_info - holds information needed to attach to a dma_buf
+ * @dmabuf:	the exported dma_buf
+ * @dev:	the device which wants to import the attachment
+ *
+ * This structure holds the information required to attach to a buffer. Used
+ * with dma_buf_attach() only.
+ */
+struct dma_buf_attach_info {
+	struct dma_buf *dmabuf;
+	struct device *dev;
+};
+
 /**
  * get_dma_buf - convenience wrapper for get_file.
  * @dmabuf:	[in]	pointer to dma_buf
@@ -376,8 +389,8 @@ static inline void get_dma_buf(struct dma_buf *dmabuf)
 	get_file(dmabuf->file);
 }
 
-struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
-							struct device *dev);
+struct dma_buf_attachment *
+dma_buf_attach(const struct dma_buf_attach_info *info);
 void dma_buf_detach(struct dma_buf *dmabuf,
 				struct dma_buf_attachment *dmabuf_attach);
 
-- 
2.14.1

[PATCH 1/5] dma-buf: use parameter structure for dma_buf_attach

[Christian König]

Move the parameters into a structure to make it simpler to extend it in
follow up patches.

This also adds the importer private as parameter so that we can directly
work with a completely filled in attachment structure.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/dma-buf/dma-buf.c                             | 15 ++++++++-------
 drivers/gpu/drm/armada/armada_gem.c                   |  6 +++++-
 drivers/gpu/drm/drm_prime.c                           |  6 +++++-
 drivers/gpu/drm/i915/i915_gem_dmabuf.c                |  6 +++++-
 drivers/gpu/drm/tegra/gem.c                           |  6 +++++-
 drivers/gpu/drm/udl/udl_dmabuf.c                      |  6 +++++-
 drivers/media/common/videobuf2/videobuf2-dma-contig.c |  6 +++++-
 drivers/media/common/videobuf2/videobuf2-dma-sg.c     |  6 +++++-
 drivers/staging/media/tegra-vde/tegra-vde.c           |  6 +++++-
 include/linux/dma-buf.h                               | 17 +++++++++++++++--
 10 files changed, 63 insertions(+), 17 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index d78d5fc173dc..4b46982c6d9c 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -534,8 +534,9 @@ EXPORT_SYMBOL_GPL(dma_buf_put);
 /**
  * dma_buf_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.
+ * @info:	[in]	holds all the attach related information provided
+ *			by the importer. see &struct dma_buf_attach_info
+ *			for further details.
  *
  * Returns struct dma_buf_attachment pointer for this attachment. Attachments
  * must be cleaned up by calling dma_buf_detach().
@@ -549,26 +550,26 @@ 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_attach(const struct dma_buf_attach_info *info)
 {
+	struct dma_buf *dmabuf = info->dmabuf;
 	struct dma_buf_attachment *attach;
 	int ret;
 
-	if (WARN_ON(!dmabuf || !dev))
+	if (WARN_ON(!dmabuf || !info->dev))
 		return ERR_PTR(-EINVAL);
 
 	attach = kzalloc(sizeof(*attach), GFP_KERNEL);
 	if (!attach)
 		return ERR_PTR(-ENOMEM);
 
-	attach->dev = dev;
+	attach->dev = info->dev;
 	attach->dmabuf = dmabuf;
 
 	mutex_lock(&dmabuf->lock);
 
 	if (dmabuf->ops->attach) {
-		ret = dmabuf->ops->attach(dmabuf, dev, attach);
+		ret = dmabuf->ops->attach(dmabuf, info->dev, attach);
 		if (ret)
 			goto err_attach;
 	}
diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c
index a97f509743a5..f4d1c11f57ea 100644
--- a/drivers/gpu/drm/armada/armada_gem.c
+++ b/drivers/gpu/drm/armada/armada_gem.c
@@ -514,6 +514,10 @@ armada_gem_prime_export(struct drm_device *dev, struct drm_gem_object *obj,
 struct drm_gem_object *
 armada_gem_prime_import(struct drm_device *dev, struct dma_buf *buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = buf
+	};
 	struct dma_buf_attachment *attach;
 	struct armada_gem_object *dobj;
 
@@ -529,7 +533,7 @@ armada_gem_prime_import(struct drm_device *dev, struct dma_buf *buf)
 		}
 	}
 
-	attach = dma_buf_attach(buf, dev->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach))
 		return ERR_CAST(attach);
 
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 7856a9b3f8a8..4da242de51c2 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -707,6 +707,10 @@ struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
 					    struct dma_buf *dma_buf,
 					    struct device *attach_dev)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = attach_dev,
+		.dmabuf = dma_buf
+	};
 	struct dma_buf_attachment *attach;
 	struct sg_table *sgt;
 	struct drm_gem_object *obj;
@@ -727,7 +731,7 @@ struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
 	if (!dev->driver->gem_prime_import_sg_table)
 		return ERR_PTR(-EINVAL);
 
-	attach = dma_buf_attach(dma_buf, attach_dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach))
 		return ERR_CAST(attach);
 
diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index 69a7aec49e84..7b737a883106 100644
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -288,6 +288,10 @@ static const struct drm_i915_gem_object_ops i915_gem_object_dmabuf_ops = {
 struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
 					     struct dma_buf *dma_buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = dma_buf
+	};
 	struct dma_buf_attachment *attach;
 	struct drm_i915_gem_object *obj;
 	int ret;
@@ -306,7 +310,7 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
 	}
 
 	/* need to attach */
-	attach = dma_buf_attach(dma_buf, dev->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach))
 		return ERR_CAST(attach);
 
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 8b0b4ff64bb4..1f2bee91e0ad 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -332,6 +332,10 @@ struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
 static struct tegra_bo *tegra_bo_import(struct drm_device *drm,
 					struct dma_buf *buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = drm->dev,
+		.dmabuf = buf
+	};
 	struct tegra_drm *tegra = drm->dev_private;
 	struct dma_buf_attachment *attach;
 	struct tegra_bo *bo;
@@ -341,7 +345,7 @@ static struct tegra_bo *tegra_bo_import(struct drm_device *drm,
 	if (IS_ERR(bo))
 		return bo;
 
-	attach = dma_buf_attach(buf, drm->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach)) {
 		err = PTR_ERR(attach);
 		goto free;
diff --git a/drivers/gpu/drm/udl/udl_dmabuf.c b/drivers/gpu/drm/udl/udl_dmabuf.c
index 2867ed155ff6..c4db84abe231 100644
--- a/drivers/gpu/drm/udl/udl_dmabuf.c
+++ b/drivers/gpu/drm/udl/udl_dmabuf.c
@@ -243,6 +243,10 @@ static int udl_prime_create(struct drm_device *dev,
 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 				struct dma_buf *dma_buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = dma_buf
+	};
 	struct dma_buf_attachment *attach;
 	struct sg_table *sg;
 	struct udl_gem_object *uobj;
@@ -250,7 +254,7 @@ struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 
 	/* need to attach */
 	get_device(dev->dev);
-	attach = dma_buf_attach(dma_buf, dev->dev);
+	attach = dma_buf_attach(&attach_info);
 	if (IS_ERR(attach)) {
 		put_device(dev->dev);
 		return ERR_CAST(attach);
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
index f1178f6f434d..93bd1f40f756 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
@@ -677,6 +677,10 @@ static void vb2_dc_detach_dmabuf(void *mem_priv)
 static void *vb2_dc_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 	unsigned long size, enum dma_data_direction dma_dir)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev,
+		.dmabuf = dbuf
+	};
 	struct vb2_dc_buf *buf;
 	struct dma_buf_attachment *dba;
 
@@ -692,7 +696,7 @@ static void *vb2_dc_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 
 	buf->dev = dev;
 	/* create attachment for the dmabuf with the user device */
-	dba = dma_buf_attach(dbuf, buf->dev);
+	dba = dma_buf_attach(&attach_info);
 	if (IS_ERR(dba)) {
 		pr_err("failed to attach dmabuf\n");
 		kfree(buf);
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 753ed3138dcc..4e61050ba87f 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -609,6 +609,10 @@ static void vb2_dma_sg_detach_dmabuf(void *mem_priv)
 static void *vb2_dma_sg_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 	unsigned long size, enum dma_data_direction dma_dir)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev,
+		.dmabuf = dbuf
+	};
 	struct vb2_dma_sg_buf *buf;
 	struct dma_buf_attachment *dba;
 
@@ -624,7 +628,7 @@ static void *vb2_dma_sg_attach_dmabuf(struct device *dev, struct dma_buf *dbuf,
 
 	buf->dev = dev;
 	/* create attachment for the dmabuf with the user device */
-	dba = dma_buf_attach(dbuf, buf->dev);
+	dba = dma_buf_attach(&attach_info);
 	if (IS_ERR(dba)) {
 		pr_err("failed to attach dmabuf\n");
 		kfree(buf);
diff --git a/drivers/staging/media/tegra-vde/tegra-vde.c b/drivers/staging/media/tegra-vde/tegra-vde.c
index c47659e96089..25d112443b0d 100644
--- a/drivers/staging/media/tegra-vde/tegra-vde.c
+++ b/drivers/staging/media/tegra-vde/tegra-vde.c
@@ -529,6 +529,10 @@ static int tegra_vde_attach_dmabuf(struct device *dev,
 				   size_t *size,
 				   enum dma_data_direction dma_dir)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev,
+		.dmabuf = dmabuf
+	};
 	struct dma_buf_attachment *attachment;
 	struct dma_buf *dmabuf;
 	struct sg_table *sgt;
@@ -547,7 +551,7 @@ static int tegra_vde_attach_dmabuf(struct device *dev,
 		return -EINVAL;
 	}
 
-	attachment = dma_buf_attach(dmabuf, dev);
+	attachment = dma_buf_attach(&attach_info);
 	if (IS_ERR(attachment)) {
 		dev_err(dev, "Failed to attach dmabuf\n");
 		err = PTR_ERR(attachment);
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 085db2fee2d7..414b4dde5eb7 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -362,6 +362,19 @@ struct dma_buf_export_info {
 	struct dma_buf_export_info name = { .exp_name = KBUILD_MODNAME, \
 					 .owner = THIS_MODULE }
 
+/**
+ * struct dma_buf_attach_info - holds information needed to attach to a dma_buf
+ * @dmabuf:	the exported dma_buf
+ * @dev:	the device which wants to import the attachment
+ *
+ * This structure holds the information required to attach to a buffer. Used
+ * with dma_buf_attach() only.
+ */
+struct dma_buf_attach_info {
+	struct dma_buf *dmabuf;
+	struct device *dev;
+};
+
 /**
  * get_dma_buf - convenience wrapper for get_file.
  * @dmabuf:	[in]	pointer to dma_buf
@@ -376,8 +389,8 @@ static inline void get_dma_buf(struct dma_buf *dmabuf)
 	get_file(dmabuf->file);
 }
 
-struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
-							struct device *dev);
+struct dma_buf_attachment *
+dma_buf_attach(const struct dma_buf_attach_info *info);
 void dma_buf_detach(struct dma_buf *dmabuf,
 				struct dma_buf_attachment *dmabuf_attach);
 
-- 
2.14.1

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

[PATCH 2/5] dma-buf: add optional invalidate_mappings callback v3

[Christian König]

Each importer can now provide an invalidate_mappings callback.

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.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/dma-buf/dma-buf.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 include/linux/dma-buf.h   | 36 ++++++++++++++++++++++++++++++++++--
 2 files changed, 78 insertions(+), 2 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 4b46982c6d9c..ffdaab10e2f2 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -565,6 +565,8 @@ struct dma_buf_attachment *dma_buf_attach(const struct dma_buf_attach_info *info
 
 	attach->dev = info->dev;
 	attach->dmabuf = dmabuf;
+	attach->importer_priv = info->importer_priv;
+	attach->invalidate = info->invalidate;
 
 	mutex_lock(&dmabuf->lock);
 
@@ -573,7 +575,9 @@ struct dma_buf_attachment *dma_buf_attach(const struct dma_buf_attach_info *info
 		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);
 	return attach;
@@ -599,7 +603,9 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)
 		return;
 
 	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);
 
@@ -633,10 +639,23 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,
 	if (WARN_ON(!attach || !attach->dmabuf))
 		return ERR_PTR(-EINVAL);
 
+	/*
+	 * Mapping a DMA-buf can trigger its invalidation, prevent sending this
+	 * event to the caller by temporary removing this attachment from the
+	 * list.
+	 */
+	if (attach->invalidate) {
+		reservation_object_assert_held(attach->dmabuf->resv);
+		list_del(&attach->node);
+	}
+
 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);
 	if (!sg_table)
 		sg_table = ERR_PTR(-ENOMEM);
 
+	if (attach->invalidate)
+		list_add(&attach->node, &attach->dmabuf->attachments);
+
 	return sg_table;
 }
 EXPORT_SYMBOL_GPL(dma_buf_map_attachment);
@@ -657,6 +676,9 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
 {
 	might_sleep();
 
+	if (attach->invalidate)
+		reservation_object_assert_held(attach->dmabuf->resv);
+
 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
 		return;
 
@@ -665,6 +687,26 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
 }
 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->invalidate)
+			attach->invalidate(attach);
+}
+EXPORT_SYMBOL_GPL(dma_buf_invalidate_mappings);
+
 /**
  * DOC: cpu access
  *
@@ -1122,10 +1164,12 @@ 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 414b4dde5eb7..566503dd2b4f 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -270,6 +270,8 @@ struct dma_buf_ops {
  * @poll: for userspace poll support
  * @cb_excl: for userspace poll support
  * @cb_shared: for userspace poll support
+ * @invalidation_supported: True when the exporter supports unpinned operation
+ *                          using the reservation lock.
  *
  * This represents a shared buffer, created by calling dma_buf_export(). The
  * userspace representation is a normal file descriptor, which can be created by
@@ -293,6 +295,7 @@ struct dma_buf {
 	struct list_head list_node;
 	void *priv;
 	struct reservation_object *resv;
+	bool invalidation_supported;
 
 	/* poll support */
 	wait_queue_head_t poll;
@@ -311,6 +314,7 @@ struct dma_buf {
  * @dev: device attached to the buffer.
  * @node: list of dma_buf_attachment.
  * @priv: exporter specific attachment data.
+ * @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
@@ -326,6 +330,29 @@ struct dma_buf_attachment {
 	struct device *dev;
 	struct list_head node;
 	void *priv;
+	void *importer_priv;
+
+	/**
+	 * @invalidate:
+	 *
+	 * Optional callback provided by the importer of the dma-buf.
+	 *
+	 * If provided the exporter can avoid pinning the backing store while
+	 * mappings exists.
+	 *
+	 * The function 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, but should be
+	 * destroyed by the importer 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);
 };
 
 /**
@@ -364,8 +391,10 @@ struct dma_buf_export_info {
 
 /**
  * struct dma_buf_attach_info - holds information needed to attach to a dma_buf
- * @dmabuf:	the exported dma_buf
- * @dev:	the device which wants to import the attachment
+ * @dmabuf:		the exported dma_buf
+ * @dev:		the device which wants to import the attachment
+ * @importer_priv:	private data of importer to this attachment
+ * @invalidate:		callback to use for invalidating mappings
  *
  * This structure holds the information required to attach to a buffer. Used
  * with dma_buf_attach() only.
@@ -373,6 +402,8 @@ struct dma_buf_export_info {
 struct dma_buf_attach_info {
 	struct dma_buf *dmabuf;
 	struct device *dev;
+	void *importer_priv;
+	void (*invalidate)(struct dma_buf_attachment *attach);
 };
 
 /**
@@ -404,6 +435,7 @@ 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,
-- 
2.14.1

[PATCH 2/5] dma-buf: add optional invalidate_mappings callback v3

[Christian König]

Each importer can now provide an invalidate_mappings callback.

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.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/dma-buf/dma-buf.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 include/linux/dma-buf.h   | 36 ++++++++++++++++++++++++++++++++++--
 2 files changed, 78 insertions(+), 2 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 4b46982c6d9c..ffdaab10e2f2 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -565,6 +565,8 @@ struct dma_buf_attachment *dma_buf_attach(const struct dma_buf_attach_info *info
 
 	attach->dev = info->dev;
 	attach->dmabuf = dmabuf;
+	attach->importer_priv = info->importer_priv;
+	attach->invalidate = info->invalidate;
 
 	mutex_lock(&dmabuf->lock);
 
@@ -573,7 +575,9 @@ struct dma_buf_attachment *dma_buf_attach(const struct dma_buf_attach_info *info
 		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);
 	return attach;
@@ -599,7 +603,9 @@ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach)
 		return;
 
 	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);
 
@@ -633,10 +639,23 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,
 	if (WARN_ON(!attach || !attach->dmabuf))
 		return ERR_PTR(-EINVAL);
 
+	/*
+	 * Mapping a DMA-buf can trigger its invalidation, prevent sending this
+	 * event to the caller by temporary removing this attachment from the
+	 * list.
+	 */
+	if (attach->invalidate) {
+		reservation_object_assert_held(attach->dmabuf->resv);
+		list_del(&attach->node);
+	}
+
 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);
 	if (!sg_table)
 		sg_table = ERR_PTR(-ENOMEM);
 
+	if (attach->invalidate)
+		list_add(&attach->node, &attach->dmabuf->attachments);
+
 	return sg_table;
 }
 EXPORT_SYMBOL_GPL(dma_buf_map_attachment);
@@ -657,6 +676,9 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
 {
 	might_sleep();
 
+	if (attach->invalidate)
+		reservation_object_assert_held(attach->dmabuf->resv);
+
 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
 		return;
 
@@ -665,6 +687,26 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,
 }
 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->invalidate)
+			attach->invalidate(attach);
+}
+EXPORT_SYMBOL_GPL(dma_buf_invalidate_mappings);
+
 /**
  * DOC: cpu access
  *
@@ -1122,10 +1164,12 @@ 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 414b4dde5eb7..566503dd2b4f 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -270,6 +270,8 @@ struct dma_buf_ops {
  * @poll: for userspace poll support
  * @cb_excl: for userspace poll support
  * @cb_shared: for userspace poll support
+ * @invalidation_supported: True when the exporter supports unpinned operation
+ *                          using the reservation lock.
  *
  * This represents a shared buffer, created by calling dma_buf_export(). The
  * userspace representation is a normal file descriptor, which can be created by
@@ -293,6 +295,7 @@ struct dma_buf {
 	struct list_head list_node;
 	void *priv;
 	struct reservation_object *resv;
+	bool invalidation_supported;
 
 	/* poll support */
 	wait_queue_head_t poll;
@@ -311,6 +314,7 @@ struct dma_buf {
  * @dev: device attached to the buffer.
  * @node: list of dma_buf_attachment.
  * @priv: exporter specific attachment data.
+ * @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
@@ -326,6 +330,29 @@ struct dma_buf_attachment {
 	struct device *dev;
 	struct list_head node;
 	void *priv;
+	void *importer_priv;
+
+	/**
+	 * @invalidate:
+	 *
+	 * Optional callback provided by the importer of the dma-buf.
+	 *
+	 * If provided the exporter can avoid pinning the backing store while
+	 * mappings exists.
+	 *
+	 * The function 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, but should be
+	 * destroyed by the importer 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);
 };
 
 /**
@@ -364,8 +391,10 @@ struct dma_buf_export_info {
 
 /**
  * struct dma_buf_attach_info - holds information needed to attach to a dma_buf
- * @dmabuf:	the exported dma_buf
- * @dev:	the device which wants to import the attachment
+ * @dmabuf:		the exported dma_buf
+ * @dev:		the device which wants to import the attachment
+ * @importer_priv:	private data of importer to this attachment
+ * @invalidate:		callback to use for invalidating mappings
  *
  * This structure holds the information required to attach to a buffer. Used
  * with dma_buf_attach() only.
@@ -373,6 +402,8 @@ struct dma_buf_export_info {
 struct dma_buf_attach_info {
 	struct dma_buf *dmabuf;
 	struct device *dev;
+	void *importer_priv;
+	void (*invalidate)(struct dma_buf_attachment *attach);
 };
 
 /**
@@ -404,6 +435,7 @@ 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,
-- 
2.14.1

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

[PATCH 3/5] drm/ttm: remove the backing store if no placement is given

[Christian König]

Pipeline removal of the BOs backing store when the placement is given
during validation.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 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 98e06f8bf23b..17e821f01d0a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1078,6 +1078,18 @@ 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.
 	 */
-- 
2.14.1

[PATCH 3/5] drm/ttm: remove the backing store if no placement is given

[Christian König]

Pipeline removal of the BOs backing store when the placement is given
during validation.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 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 98e06f8bf23b..17e821f01d0a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1078,6 +1078,18 @@ 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.
 	 */
-- 
2.14.1

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

[PATCH 4/5] drm/amdgpu: add independent DMA-buf export v2

[Christian König]

Instead of relying on the DRM functions just implement our own export
functions. This adds support for taking care of unpinned DMA-buf.

v2: fix unintended recursion, remove debugging leftovers

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   5 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c  | 108 ++++++++++++++++++-----------
 4 files changed, 72 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 2babfad1fd7f..3e1727251edc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -371,7 +371,6 @@ int amdgpu_gem_object_open(struct drm_gem_object *obj,
 void amdgpu_gem_object_close(struct drm_gem_object *obj,
 				struct drm_file *file_priv);
 unsigned long amdgpu_gem_timeout(uint64_t timeout_ns);
-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 0b19482b36b8..6107b845d8a8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -890,7 +890,6 @@ 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 9e23d6f6f3f3..15bb48cebbc4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -31,6 +31,7 @@
  */
 #include <linux/list.h>
 #include <linux/slab.h>
+#include <linux/dma-buf.h>
 #include <drm/drmP.h>
 #include <drm/amdgpu_drm.h>
 #include <drm/drm_cache.h>
@@ -953,6 +954,10 @@ 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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index 4b584cb75bf4..7fef95f0fed1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -32,14 +32,6 @@
 
 static const struct dma_buf_ops amdgpu_dmabuf_ops;
 
-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);
-}
-
 void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj)
 {
 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
@@ -126,23 +118,22 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
 	return ERR_PTR(ret);
 }
 
-static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
-				 struct device *target_dev,
-				 struct dma_buf_attachment *attach)
+static struct sg_table *
+amdgpu_gem_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, target_dev, attach);
-	if (r)
-		return r;
-
-	r = amdgpu_bo_reserve(bo, false);
-	if (unlikely(r != 0))
-		goto error_detach;
-
+	if (!attach->invalidate) {
+		r = amdgpu_bo_reserve(bo, false);
+		if (unlikely(r != 0))
+			return ERR_PTR(r);
+	}
 
 	if (attach->dev->driver != adev->dev->driver) {
 		/*
@@ -158,42 +149,77 @@ static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
 		}
 	}
 
-	/* pin buffer into GTT */
-	r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL);
-	if (r)
+	if (!attach->invalidate) {
+		/* pin buffer into GTT */
+		r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL);
+		if (r)
+			goto error_unreserve;
+
+	} else {
+		/* move buffer into GTT */
+		struct ttm_operation_ctx ctx = { false, false };
+
+		amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
+		r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
+		if (r)
+			goto error_unreserve;
+	}
+
+	sgt = drm_prime_pages_to_sg(bo->tbo.ttm->pages, bo->tbo.num_pages);
+	if (IS_ERR(sgt)) {
+		r = PTR_ERR(sgt);
 		goto error_unreserve;
+	}
+
+	if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
+			      DMA_ATTR_SKIP_CPU_SYNC))
+		goto error_free;
 
 	if (attach->dev->driver != adev->dev->driver)
 		bo->prime_shared_count++;
 
+	if (!attach->invalidate)
+		amdgpu_bo_unreserve(bo);
+
+	return sgt;
+
+error_free:
+	sg_free_table(sgt);
+	kfree(sgt);
+	r = -ENOMEM;
+
 error_unreserve:
-	amdgpu_bo_unreserve(bo);
+	if (!attach->invalidate)
+		amdgpu_bo_unreserve(bo);
 
-error_detach:
-	if (r)
-		drm_gem_map_detach(dma_buf, attach);
-	return r;
+	return ERR_PTR(r);
 }
 
-static void amdgpu_gem_map_detach(struct dma_buf *dma_buf,
-				  struct dma_buf_attachment *attach)
+static void amdgpu_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
+				     struct sg_table *sgt,
+				     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);
-	int ret = 0;
 
-	ret = amdgpu_bo_reserve(bo, true);
-	if (unlikely(ret != 0))
-		goto error;
+	if (!attach->invalidate) {
+		amdgpu_bo_reserve(bo, true);
+		amdgpu_bo_unpin(bo);
+	}
 
-	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);
+	if (!attach->invalidate)
+		amdgpu_bo_unreserve(bo);
+
+	if (sgt) {
+		dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir);
+		sg_free_table(sgt);
+		kfree(sgt);
+	}
 }
 
 struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *obj)
@@ -232,10 +258,8 @@ static int amdgpu_gem_begin_cpu_access(struct dma_buf *dma_buf,
 }
 
 static const struct dma_buf_ops amdgpu_dmabuf_ops = {
-	.attach = amdgpu_gem_map_attach,
-	.detach = amdgpu_gem_map_detach,
-	.map_dma_buf = drm_gem_map_dma_buf,
-	.unmap_dma_buf = drm_gem_unmap_dma_buf,
+	.map_dma_buf = amdgpu_gem_map_dma_buf,
+	.unmap_dma_buf = amdgpu_gem_unmap_dma_buf,
 	.release = drm_gem_dmabuf_release,
 	.begin_cpu_access = amdgpu_gem_begin_cpu_access,
 	.map = drm_gem_dmabuf_kmap,
@@ -260,6 +284,8 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
 
 	buf = drm_gem_prime_export(dev, gobj, flags);
 	if (!IS_ERR(buf)) {
+		buf->invalidation_supported =
+			!!(bo->preferred_domains & AMDGPU_GEM_DOMAIN_GTT);
 		buf->file->f_mapping = dev->anon_inode->i_mapping;
 		buf->ops = &amdgpu_dmabuf_ops;
 	}
-- 
2.14.1

[PATCH 4/5] drm/amdgpu: add independent DMA-buf export v2

[Christian König]

Instead of relying on the DRM functions just implement our own export
functions. This adds support for taking care of unpinned DMA-buf.

v2: fix unintended recursion, remove debugging leftovers

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   5 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c  | 108 ++++++++++++++++++-----------
 4 files changed, 72 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 2babfad1fd7f..3e1727251edc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -371,7 +371,6 @@ int amdgpu_gem_object_open(struct drm_gem_object *obj,
 void amdgpu_gem_object_close(struct drm_gem_object *obj,
 				struct drm_file *file_priv);
 unsigned long amdgpu_gem_timeout(uint64_t timeout_ns);
-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 0b19482b36b8..6107b845d8a8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -890,7 +890,6 @@ 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 9e23d6f6f3f3..15bb48cebbc4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -31,6 +31,7 @@
  */
 #include <linux/list.h>
 #include <linux/slab.h>
+#include <linux/dma-buf.h>
 #include <drm/drmP.h>
 #include <drm/amdgpu_drm.h>
 #include <drm/drm_cache.h>
@@ -953,6 +954,10 @@ 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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index 4b584cb75bf4..7fef95f0fed1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -32,14 +32,6 @@
 
 static const struct dma_buf_ops amdgpu_dmabuf_ops;
 
-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);
-}
-
 void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj)
 {
 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
@@ -126,23 +118,22 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
 	return ERR_PTR(ret);
 }
 
-static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
-				 struct device *target_dev,
-				 struct dma_buf_attachment *attach)
+static struct sg_table *
+amdgpu_gem_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, target_dev, attach);
-	if (r)
-		return r;
-
-	r = amdgpu_bo_reserve(bo, false);
-	if (unlikely(r != 0))
-		goto error_detach;
-
+	if (!attach->invalidate) {
+		r = amdgpu_bo_reserve(bo, false);
+		if (unlikely(r != 0))
+			return ERR_PTR(r);
+	}
 
 	if (attach->dev->driver != adev->dev->driver) {
 		/*
@@ -158,42 +149,77 @@ static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
 		}
 	}
 
-	/* pin buffer into GTT */
-	r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL);
-	if (r)
+	if (!attach->invalidate) {
+		/* pin buffer into GTT */
+		r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL);
+		if (r)
+			goto error_unreserve;
+
+	} else {
+		/* move buffer into GTT */
+		struct ttm_operation_ctx ctx = { false, false };
+
+		amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
+		r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
+		if (r)
+			goto error_unreserve;
+	}
+
+	sgt = drm_prime_pages_to_sg(bo->tbo.ttm->pages, bo->tbo.num_pages);
+	if (IS_ERR(sgt)) {
+		r = PTR_ERR(sgt);
 		goto error_unreserve;
+	}
+
+	if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,
+			      DMA_ATTR_SKIP_CPU_SYNC))
+		goto error_free;
 
 	if (attach->dev->driver != adev->dev->driver)
 		bo->prime_shared_count++;
 
+	if (!attach->invalidate)
+		amdgpu_bo_unreserve(bo);
+
+	return sgt;
+
+error_free:
+	sg_free_table(sgt);
+	kfree(sgt);
+	r = -ENOMEM;
+
 error_unreserve:
-	amdgpu_bo_unreserve(bo);
+	if (!attach->invalidate)
+		amdgpu_bo_unreserve(bo);
 
-error_detach:
-	if (r)
-		drm_gem_map_detach(dma_buf, attach);
-	return r;
+	return ERR_PTR(r);
 }
 
-static void amdgpu_gem_map_detach(struct dma_buf *dma_buf,
-				  struct dma_buf_attachment *attach)
+static void amdgpu_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
+				     struct sg_table *sgt,
+				     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);
-	int ret = 0;
 
-	ret = amdgpu_bo_reserve(bo, true);
-	if (unlikely(ret != 0))
-		goto error;
+	if (!attach->invalidate) {
+		amdgpu_bo_reserve(bo, true);
+		amdgpu_bo_unpin(bo);
+	}
 
-	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);
+	if (!attach->invalidate)
+		amdgpu_bo_unreserve(bo);
+
+	if (sgt) {
+		dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir);
+		sg_free_table(sgt);
+		kfree(sgt);
+	}
 }
 
 struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *obj)
@@ -232,10 +258,8 @@ static int amdgpu_gem_begin_cpu_access(struct dma_buf *dma_buf,
 }
 
 static const struct dma_buf_ops amdgpu_dmabuf_ops = {
-	.attach = amdgpu_gem_map_attach,
-	.detach = amdgpu_gem_map_detach,
-	.map_dma_buf = drm_gem_map_dma_buf,
-	.unmap_dma_buf = drm_gem_unmap_dma_buf,
+	.map_dma_buf = amdgpu_gem_map_dma_buf,
+	.unmap_dma_buf = amdgpu_gem_unmap_dma_buf,
 	.release = drm_gem_dmabuf_release,
 	.begin_cpu_access = amdgpu_gem_begin_cpu_access,
 	.map = drm_gem_dmabuf_kmap,
@@ -260,6 +284,8 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
 
 	buf = drm_gem_prime_export(dev, gobj, flags);
 	if (!IS_ERR(buf)) {
+		buf->invalidation_supported =
+			!!(bo->preferred_domains & AMDGPU_GEM_DOMAIN_GTT);
 		buf->file->f_mapping = dev->anon_inode->i_mapping;
 		buf->ops = &amdgpu_dmabuf_ops;
 	}
-- 
2.14.1

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

[PATCH 5/5] drm/amdgpu: add independent DMA-buf import v3

[Christian König]

Instead of relying on the DRM functions just implement our own import
functions. This adds 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

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 72 ++++++++++++++++++++++++++-----
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c   | 32 +++++++++++---
 2 files changed, 89 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index 7fef95f0fed1..58dcfba0225a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -86,28 +86,24 @@ int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma
 	return ret;
 }
 
-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_gem_prime_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;
 	int ret;
 
 	ww_mutex_lock(&resv->lock, NULL);
-	ret = amdgpu_bo_create(adev, attach->dmabuf->size, PAGE_SIZE,
+	ret = amdgpu_bo_create(adev, dma_buf->size, PAGE_SIZE,
 			       AMDGPU_GEM_DOMAIN_CPU, 0, ttm_bo_type_sg,
 			       resv, &bo);
 	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);
@@ -118,6 +114,26 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
 	return ERR_PTR(ret);
 }
 
+struct drm_gem_object *
+amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
+				 struct dma_buf_attachment *attach,
+				 struct sg_table *sg)
+{
+	struct drm_gem_object *obj;
+	struct amdgpu_bo *bo;
+
+	obj = amdgpu_gem_prime_create_obj(dev, attach->dmabuf);
+	if (IS_ERR(obj))
+		return obj;
+
+	bo = gem_to_amdgpu_bo(obj);
+	amdgpu_bo_reserve(bo, true);
+	bo->tbo.sg = sg;
+	bo->tbo.ttm->sg = sg;
+	amdgpu_bo_unreserve(bo);
+	return obj;
+}
+
 static struct sg_table *
 amdgpu_gem_map_dma_buf(struct dma_buf_attachment *attach,
 		       enum dma_data_direction dir)
@@ -293,9 +309,29 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
 	return buf;
 }
 
+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->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 unmap DMA-buf import (%d))\n", r);
+}
+
 struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
 					    struct dma_buf *dma_buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = dma_buf,
+		.invalidate = amdgpu_gem_prime_invalidate_mappings
+	};
+	struct dma_buf_attachment *attach;
 	struct drm_gem_object *obj;
 
 	if (dma_buf->ops == &amdgpu_dmabuf_ops) {
@@ -310,5 +346,21 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
 		}
 	}
 
-	return drm_gem_prime_import(dev, dma_buf);
+	if (!dma_buf->invalidation_supported)
+		return drm_gem_prime_import(dev, dma_buf);
+
+	obj = amdgpu_gem_prime_create_obj(dev, dma_buf);
+	if (IS_ERR(obj))
+		return obj;
+
+	attach_info.importer_priv = obj;
+	attach = dma_buf_attach(&attach_info);
+	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_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index ab73300e6c7f..2a8f328918cb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -43,6 +43,7 @@
 #include <linux/pagemap.h>
 #include <linux/debugfs.h>
 #include <linux/iommu.h>
+#include <linux/dma-buf.h>
 #include "amdgpu.h"
 #include "amdgpu_object.h"
 #include "amdgpu_trace.h"
@@ -680,6 +681,7 @@ struct amdgpu_ttm_gup_task_list {
 
 struct amdgpu_ttm_tt {
 	struct ttm_dma_tt	ttm;
+	struct amdgpu_bo	*bo;
 	u64			offset;
 	uint64_t		userptr;
 	struct mm_struct	*usermm;
@@ -988,6 +990,7 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
 		return NULL;
 	}
 	gtt->ttm.ttm.func = &amdgpu_backend_func;
+	gtt->bo = ttm_to_amdgpu_bo(bo);
 	if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags)) {
 		kfree(gtt);
 		return NULL;
@@ -1000,7 +1003,6 @@ 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);
 
 	if (gtt && gtt->userptr) {
 		ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
@@ -1012,7 +1014,19 @@ 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->bo->gem_base.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);
@@ -1031,9 +1045,8 @@ 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);
@@ -1042,7 +1055,16 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
 		return;
 	}
 
-	if (slave)
+	if (ttm->sg && !gtt->bo->tbo.sg) {
+		struct dma_buf_attachment *attach;
+
+		attach = gtt->bo->gem_base.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);
-- 
2.14.1

[PATCH 5/5] drm/amdgpu: add independent DMA-buf import v3

[Christian König]

Instead of relying on the DRM functions just implement our own import
functions. This adds 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

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 72 ++++++++++++++++++++++++++-----
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c   | 32 +++++++++++---
 2 files changed, 89 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index 7fef95f0fed1..58dcfba0225a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -86,28 +86,24 @@ int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma
 	return ret;
 }
 
-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_gem_prime_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;
 	int ret;
 
 	ww_mutex_lock(&resv->lock, NULL);
-	ret = amdgpu_bo_create(adev, attach->dmabuf->size, PAGE_SIZE,
+	ret = amdgpu_bo_create(adev, dma_buf->size, PAGE_SIZE,
 			       AMDGPU_GEM_DOMAIN_CPU, 0, ttm_bo_type_sg,
 			       resv, &bo);
 	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);
@@ -118,6 +114,26 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
 	return ERR_PTR(ret);
 }
 
+struct drm_gem_object *
+amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
+				 struct dma_buf_attachment *attach,
+				 struct sg_table *sg)
+{
+	struct drm_gem_object *obj;
+	struct amdgpu_bo *bo;
+
+	obj = amdgpu_gem_prime_create_obj(dev, attach->dmabuf);
+	if (IS_ERR(obj))
+		return obj;
+
+	bo = gem_to_amdgpu_bo(obj);
+	amdgpu_bo_reserve(bo, true);
+	bo->tbo.sg = sg;
+	bo->tbo.ttm->sg = sg;
+	amdgpu_bo_unreserve(bo);
+	return obj;
+}
+
 static struct sg_table *
 amdgpu_gem_map_dma_buf(struct dma_buf_attachment *attach,
 		       enum dma_data_direction dir)
@@ -293,9 +309,29 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
 	return buf;
 }
 
+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->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 unmap DMA-buf import (%d))\n", r);
+}
+
 struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
 					    struct dma_buf *dma_buf)
 {
+	struct dma_buf_attach_info attach_info = {
+		.dev = dev->dev,
+		.dmabuf = dma_buf,
+		.invalidate = amdgpu_gem_prime_invalidate_mappings
+	};
+	struct dma_buf_attachment *attach;
 	struct drm_gem_object *obj;
 
 	if (dma_buf->ops == &amdgpu_dmabuf_ops) {
@@ -310,5 +346,21 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
 		}
 	}
 
-	return drm_gem_prime_import(dev, dma_buf);
+	if (!dma_buf->invalidation_supported)
+		return drm_gem_prime_import(dev, dma_buf);
+
+	obj = amdgpu_gem_prime_create_obj(dev, dma_buf);
+	if (IS_ERR(obj))
+		return obj;
+
+	attach_info.importer_priv = obj;
+	attach = dma_buf_attach(&attach_info);
+	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_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index ab73300e6c7f..2a8f328918cb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -43,6 +43,7 @@
 #include <linux/pagemap.h>
 #include <linux/debugfs.h>
 #include <linux/iommu.h>
+#include <linux/dma-buf.h>
 #include "amdgpu.h"
 #include "amdgpu_object.h"
 #include "amdgpu_trace.h"
@@ -680,6 +681,7 @@ struct amdgpu_ttm_gup_task_list {
 
 struct amdgpu_ttm_tt {
 	struct ttm_dma_tt	ttm;
+	struct amdgpu_bo	*bo;
 	u64			offset;
 	uint64_t		userptr;
 	struct mm_struct	*usermm;
@@ -988,6 +990,7 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
 		return NULL;
 	}
 	gtt->ttm.ttm.func = &amdgpu_backend_func;
+	gtt->bo = ttm_to_amdgpu_bo(bo);
 	if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags)) {
 		kfree(gtt);
 		return NULL;
@@ -1000,7 +1003,6 @@ 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);
 
 	if (gtt && gtt->userptr) {
 		ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
@@ -1012,7 +1014,19 @@ 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->bo->gem_base.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);
@@ -1031,9 +1045,8 @@ 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);
@@ -1042,7 +1055,16 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
 		return;
 	}
 
-	if (slave)
+	if (ttm->sg && !gtt->bo->tbo.sg) {
+		struct dma_buf_attachment *attach;
+
+		attach = gtt->bo->gem_base.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);
-- 
2.14.1

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

Re: [PATCH 1/5] dma-buf: use parameter structure for dma_buf_attach

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 3514 bytes --]

Hi Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.17-rc2 next-20180424]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Christian-K-nig/dma-buf-use-parameter-structure-for-dma_buf_attach/20180413-080639
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: powerpc64-allmodconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc64 

All errors (new ones prefixed by >>):

   drivers/staging/media/tegra-vde/tegra-vde.c: In function 'tegra_vde_attach_dmabuf':
>> drivers/staging/media/tegra-vde/tegra-vde.c:534:13: error: 'dmabuf' undeclared (first use in this function); did you mean 'dma_buf'?
      .dmabuf = dmabuf
                ^~~~~~
                dma_buf
   drivers/staging/media/tegra-vde/tegra-vde.c:534:13: note: each undeclared identifier is reported only once for each function it appears in

vim +534 drivers/staging/media/tegra-vde/tegra-vde.c

   521	
   522	static int tegra_vde_attach_dmabuf(struct device *dev,
   523					   int fd,
   524					   unsigned long offset,
   525					   unsigned int min_size,
   526					   struct dma_buf_attachment **a,
   527					   dma_addr_t *addr,
   528					   struct sg_table **s,
   529					   size_t *size,
   530					   enum dma_data_direction dma_dir)
   531	{
   532		struct dma_buf_attach_info attach_info = {
   533			.dev = dev,
 > 534			.dmabuf = dmabuf
   535		};
   536		struct dma_buf_attachment *attachment;
   537		struct dma_buf *dmabuf;
   538		struct sg_table *sgt;
   539		int err;
   540	
   541		dmabuf = dma_buf_get(fd);
   542		if (IS_ERR(dmabuf)) {
   543			dev_err(dev, "Invalid dmabuf FD\n");
   544			return PTR_ERR(dmabuf);
   545		}
   546	
   547		if ((u64)offset + min_size > dmabuf->size) {
   548			dev_err(dev, "Too small dmabuf size %zu @0x%lX, "
   549				     "should be at least %d\n",
   550				dmabuf->size, offset, min_size);
   551			return -EINVAL;
   552		}
   553	
   554		attachment = dma_buf_attach(&attach_info);
   555		if (IS_ERR(attachment)) {
   556			dev_err(dev, "Failed to attach dmabuf\n");
   557			err = PTR_ERR(attachment);
   558			goto err_put;
   559		}
   560	
   561		sgt = dma_buf_map_attachment(attachment, dma_dir);
   562		if (IS_ERR(sgt)) {
   563			dev_err(dev, "Failed to get dmabufs sg_table\n");
   564			err = PTR_ERR(sgt);
   565			goto err_detach;
   566		}
   567	
   568		if (sgt->nents != 1) {
   569			dev_err(dev, "Sparse DMA region is unsupported\n");
   570			err = -EINVAL;
   571			goto err_unmap;
   572		}
   573	
   574		*addr = sg_dma_address(sgt->sgl) + offset;
   575		*a = attachment;
   576		*s = sgt;
   577	
   578		if (size)
   579			*size = dmabuf->size - offset;
   580	
   581		return 0;
   582	
   583	err_unmap:
   584		dma_buf_unmap_attachment(attachment, sgt, dma_dir);
   585	err_detach:
   586		dma_buf_detach(dmabuf, attachment);
   587	err_put:
   588		dma_buf_put(dmabuf);
   589	
   590		return err;
   591	}
   592	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 56402 bytes --]

Re: [PATCH 1/5] dma-buf: use parameter structure for dma_buf_attach

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 3514 bytes --]

Hi Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.17-rc2 next-20180424]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Christian-K-nig/dma-buf-use-parameter-structure-for-dma_buf_attach/20180413-080639
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: powerpc64-allmodconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc64 

All errors (new ones prefixed by >>):

   drivers/staging/media/tegra-vde/tegra-vde.c: In function 'tegra_vde_attach_dmabuf':
>> drivers/staging/media/tegra-vde/tegra-vde.c:534:13: error: 'dmabuf' undeclared (first use in this function); did you mean 'dma_buf'?
      .dmabuf = dmabuf
                ^~~~~~
                dma_buf
   drivers/staging/media/tegra-vde/tegra-vde.c:534:13: note: each undeclared identifier is reported only once for each function it appears in

vim +534 drivers/staging/media/tegra-vde/tegra-vde.c

   521	
   522	static int tegra_vde_attach_dmabuf(struct device *dev,
   523					   int fd,
   524					   unsigned long offset,
   525					   unsigned int min_size,
   526					   struct dma_buf_attachment **a,
   527					   dma_addr_t *addr,
   528					   struct sg_table **s,
   529					   size_t *size,
   530					   enum dma_data_direction dma_dir)
   531	{
   532		struct dma_buf_attach_info attach_info = {
   533			.dev = dev,
 > 534			.dmabuf = dmabuf
   535		};
   536		struct dma_buf_attachment *attachment;
   537		struct dma_buf *dmabuf;
   538		struct sg_table *sgt;
   539		int err;
   540	
   541		dmabuf = dma_buf_get(fd);
   542		if (IS_ERR(dmabuf)) {
   543			dev_err(dev, "Invalid dmabuf FD\n");
   544			return PTR_ERR(dmabuf);
   545		}
   546	
   547		if ((u64)offset + min_size > dmabuf->size) {
   548			dev_err(dev, "Too small dmabuf size %zu @0x%lX, "
   549				     "should be at least %d\n",
   550				dmabuf->size, offset, min_size);
   551			return -EINVAL;
   552		}
   553	
   554		attachment = dma_buf_attach(&attach_info);
   555		if (IS_ERR(attachment)) {
   556			dev_err(dev, "Failed to attach dmabuf\n");
   557			err = PTR_ERR(attachment);
   558			goto err_put;
   559		}
   560	
   561		sgt = dma_buf_map_attachment(attachment, dma_dir);
   562		if (IS_ERR(sgt)) {
   563			dev_err(dev, "Failed to get dmabufs sg_table\n");
   564			err = PTR_ERR(sgt);
   565			goto err_detach;
   566		}
   567	
   568		if (sgt->nents != 1) {
   569			dev_err(dev, "Sparse DMA region is unsupported\n");
   570			err = -EINVAL;
   571			goto err_unmap;
   572		}
   573	
   574		*addr = sg_dma_address(sgt->sgl) + offset;
   575		*a = attachment;
   576		*s = sgt;
   577	
   578		if (size)
   579			*size = dmabuf->size - offset;
   580	
   581		return 0;
   582	
   583	err_unmap:
   584		dma_buf_unmap_attachment(attachment, sgt, dma_dir);
   585	err_detach:
   586		dma_buf_detach(dmabuf, attachment);
   587	err_put:
   588		dma_buf_put(dmabuf);
   589	
   590		return err;
   591	}
   592	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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amd-gfx mailing list
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Re: [PATCH 1/5] dma-buf: use parameter structure for dma_buf_attach

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 3479 bytes --]

Hi Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.17-rc2 next-20180424]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Christian-K-nig/dma-buf-use-parameter-structure-for-dma_buf_attach/20180413-080639
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: openrisc-allyesconfig (attached as .config)
compiler: or1k-linux-gcc (GCC) 6.0.0 20160327 (experimental)
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All errors (new ones prefixed by >>):

   drivers/staging//media/tegra-vde/tegra-vde.c: In function 'tegra_vde_attach_dmabuf':
>> drivers/staging//media/tegra-vde/tegra-vde.c:534:13: error: 'dmabuf' undeclared (first use in this function)
      .dmabuf = dmabuf
                ^~~~~~
   drivers/staging//media/tegra-vde/tegra-vde.c:534:13: note: each undeclared identifier is reported only once for each function it appears in

vim +/dmabuf +534 drivers/staging//media/tegra-vde/tegra-vde.c

   521	
   522	static int tegra_vde_attach_dmabuf(struct device *dev,
   523					   int fd,
   524					   unsigned long offset,
   525					   unsigned int min_size,
   526					   struct dma_buf_attachment **a,
   527					   dma_addr_t *addr,
   528					   struct sg_table **s,
   529					   size_t *size,
   530					   enum dma_data_direction dma_dir)
   531	{
   532		struct dma_buf_attach_info attach_info = {
   533			.dev = dev,
 > 534			.dmabuf = dmabuf
   535		};
   536		struct dma_buf_attachment *attachment;
   537		struct dma_buf *dmabuf;
   538		struct sg_table *sgt;
   539		int err;
   540	
   541		dmabuf = dma_buf_get(fd);
   542		if (IS_ERR(dmabuf)) {
   543			dev_err(dev, "Invalid dmabuf FD\n");
   544			return PTR_ERR(dmabuf);
   545		}
   546	
   547		if ((u64)offset + min_size > dmabuf->size) {
   548			dev_err(dev, "Too small dmabuf size %zu @0x%lX, "
   549				     "should be at least %d\n",
   550				dmabuf->size, offset, min_size);
   551			return -EINVAL;
   552		}
   553	
   554		attachment = dma_buf_attach(&attach_info);
   555		if (IS_ERR(attachment)) {
   556			dev_err(dev, "Failed to attach dmabuf\n");
   557			err = PTR_ERR(attachment);
   558			goto err_put;
   559		}
   560	
   561		sgt = dma_buf_map_attachment(attachment, dma_dir);
   562		if (IS_ERR(sgt)) {
   563			dev_err(dev, "Failed to get dmabufs sg_table\n");
   564			err = PTR_ERR(sgt);
   565			goto err_detach;
   566		}
   567	
   568		if (sgt->nents != 1) {
   569			dev_err(dev, "Sparse DMA region is unsupported\n");
   570			err = -EINVAL;
   571			goto err_unmap;
   572		}
   573	
   574		*addr = sg_dma_address(sgt->sgl) + offset;
   575		*a = attachment;
   576		*s = sgt;
   577	
   578		if (size)
   579			*size = dmabuf->size - offset;
   580	
   581		return 0;
   582	
   583	err_unmap:
   584		dma_buf_unmap_attachment(attachment, sgt, dma_dir);
   585	err_detach:
   586		dma_buf_detach(dmabuf, attachment);
   587	err_put:
   588		dma_buf_put(dmabuf);
   589	
   590		return err;
   591	}
   592	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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Re: [PATCH 1/5] dma-buf: use parameter structure for dma_buf_attach

[kbuild test robot]

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Hi Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.17-rc2 next-20180424]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Christian-K-nig/dma-buf-use-parameter-structure-for-dma_buf_attach/20180413-080639
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: openrisc-allyesconfig (attached as .config)
compiler: or1k-linux-gcc (GCC) 6.0.0 20160327 (experimental)
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All errors (new ones prefixed by >>):

   drivers/staging//media/tegra-vde/tegra-vde.c: In function 'tegra_vde_attach_dmabuf':
>> drivers/staging//media/tegra-vde/tegra-vde.c:534:13: error: 'dmabuf' undeclared (first use in this function)
      .dmabuf = dmabuf
                ^~~~~~
   drivers/staging//media/tegra-vde/tegra-vde.c:534:13: note: each undeclared identifier is reported only once for each function it appears in

vim +/dmabuf +534 drivers/staging//media/tegra-vde/tegra-vde.c

   521	
   522	static int tegra_vde_attach_dmabuf(struct device *dev,
   523					   int fd,
   524					   unsigned long offset,
   525					   unsigned int min_size,
   526					   struct dma_buf_attachment **a,
   527					   dma_addr_t *addr,
   528					   struct sg_table **s,
   529					   size_t *size,
   530					   enum dma_data_direction dma_dir)
   531	{
   532		struct dma_buf_attach_info attach_info = {
   533			.dev = dev,
 > 534			.dmabuf = dmabuf
   535		};
   536		struct dma_buf_attachment *attachment;
   537		struct dma_buf *dmabuf;
   538		struct sg_table *sgt;
   539		int err;
   540	
   541		dmabuf = dma_buf_get(fd);
   542		if (IS_ERR(dmabuf)) {
   543			dev_err(dev, "Invalid dmabuf FD\n");
   544			return PTR_ERR(dmabuf);
   545		}
   546	
   547		if ((u64)offset + min_size > dmabuf->size) {
   548			dev_err(dev, "Too small dmabuf size %zu @0x%lX, "
   549				     "should be at least %d\n",
   550				dmabuf->size, offset, min_size);
   551			return -EINVAL;
   552		}
   553	
   554		attachment = dma_buf_attach(&attach_info);
   555		if (IS_ERR(attachment)) {
   556			dev_err(dev, "Failed to attach dmabuf\n");
   557			err = PTR_ERR(attachment);
   558			goto err_put;
   559		}
   560	
   561		sgt = dma_buf_map_attachment(attachment, dma_dir);
   562		if (IS_ERR(sgt)) {
   563			dev_err(dev, "Failed to get dmabufs sg_table\n");
   564			err = PTR_ERR(sgt);
   565			goto err_detach;
   566		}
   567	
   568		if (sgt->nents != 1) {
   569			dev_err(dev, "Sparse DMA region is unsupported\n");
   570			err = -EINVAL;
   571			goto err_unmap;
   572		}
   573	
   574		*addr = sg_dma_address(sgt->sgl) + offset;
   575		*a = attachment;
   576		*s = sgt;
   577	
   578		if (size)
   579			*size = dmabuf->size - offset;
   580	
   581		return 0;
   582	
   583	err_unmap:
   584		dma_buf_unmap_attachment(attachment, sgt, dma_dir);
   585	err_detach:
   586		dma_buf_detach(dmabuf, attachment);
   587	err_put:
   588		dma_buf_put(dmabuf);
   589	
   590		return err;
   591	}
   592	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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