[PATCH v2 1/3] drm/gem: don't force writecombine mmap'ing

[PATCH v2 1/3] drm/gem: don't force writecombine mmap'ing

[Rob Clark]

From: Rob Clark <robdclark@chromium.org>

The driver should be in control of this.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
It is possible that this was masking bugs (ie. not setting appropriate
pgprot) in drivers.  I don't have a particularly good idea for tracking
those down (since I don't have the hw for most drivers).  Unless someone
has a better idea, maybe land this and let driver maintainers fix any
potential fallout in their drivers?

This is necessary for the last patch to fix VGEM brokenness on arm.

 drivers/gpu/drm/drm_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 8a55f71325b1..7d6242cc69f2 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1110,7 +1110,7 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
 
 	vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
 	vma->vm_private_data = obj;
-	vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
+	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
 	vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
 
 	/* Take a ref for this mapping of the object, so that the fault
-- 
2.21.0

[PATCH v2 2/3] drm: plumb attaching dev thru to prime_pin/unpin

[Rob Clark]

From: Rob Clark <robdclark@chromium.org>

Needed in the following patch for cache operations.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/drm_gem.c                   | 10 ++++++----
 drivers/gpu/drm/drm_gem_vram_helper.c       |  6 ++++--
 drivers/gpu/drm/drm_prime.c                 |  4 ++--
 drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c |  4 ++--
 drivers/gpu/drm/msm/msm_drv.h               |  4 ++--
 drivers/gpu/drm/msm/msm_gem_prime.c         |  4 ++--
 drivers/gpu/drm/nouveau/nouveau_gem.h       |  4 ++--
 drivers/gpu/drm/nouveau/nouveau_prime.c     |  4 ++--
 drivers/gpu/drm/qxl/qxl_prime.c             |  4 ++--
 drivers/gpu/drm/radeon/radeon_prime.c       |  4 ++--
 drivers/gpu/drm/vboxvideo/vbox_prime.c      |  4 ++--
 drivers/gpu/drm/vgem/vgem_drv.c             |  4 ++--
 include/drm/drm_drv.h                       |  4 ++--
 include/drm/drm_gem.h                       |  4 ++--
 include/drm/drm_gem_vram_helper.h           |  4 ++--
 15 files changed, 36 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 7d6242cc69f2..0a2645769624 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1219,18 +1219,19 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
 /**
  * drm_gem_pin - Pin backing buffer in memory
  * @obj: GEM object
+ * @dev: the device the buffer is being pinned for
  *
  * Make sure the backing buffer is pinned in memory.
  *
  * Returns:
  * 0 on success or a negative error code on failure.
  */
-int drm_gem_pin(struct drm_gem_object *obj)
+int drm_gem_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (obj->funcs && obj->funcs->pin)
 		return obj->funcs->pin(obj);
 	else if (obj->dev->driver->gem_prime_pin)
-		return obj->dev->driver->gem_prime_pin(obj);
+		return obj->dev->driver->gem_prime_pin(obj, dev);
 	else
 		return 0;
 }
@@ -1239,15 +1240,16 @@ EXPORT_SYMBOL(drm_gem_pin);
 /**
  * drm_gem_unpin - Unpin backing buffer from memory
  * @obj: GEM object
+ * @dev: the device the buffer is being pinned for
  *
  * Relax the requirement that the backing buffer is pinned in memory.
  */
-void drm_gem_unpin(struct drm_gem_object *obj)
+void drm_gem_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (obj->funcs && obj->funcs->unpin)
 		obj->funcs->unpin(obj);
 	else if (obj->dev->driver->gem_prime_unpin)
-		obj->dev->driver->gem_prime_unpin(obj);
+		obj->dev->driver->gem_prime_unpin(obj, dev);
 }
 EXPORT_SYMBOL(drm_gem_unpin);
 
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index 4de782ca26b2..62fafec93948 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -548,7 +548,8 @@ EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);
  * 0 on success, or
  * a negative errno code otherwise.
  */
-int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem)
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem,
+				      struct device *dev)
 {
 	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
 
@@ -569,7 +570,8 @@ EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_pin);
 	Implements &struct drm_driver.gem_prime_unpin
  * @gem:	The GEM object to unpin
  */
-void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem)
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem,
+					 struct device *dev)
 {
 	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
 
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index d0c01318076b..505893cfac8e 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -196,7 +196,7 @@ int drm_gem_map_attach(struct dma_buf *dma_buf,
 {
 	struct drm_gem_object *obj = dma_buf->priv;
 
-	return drm_gem_pin(obj);
+	return drm_gem_pin(obj, attach->dev);
 }
 EXPORT_SYMBOL(drm_gem_map_attach);
 
@@ -213,7 +213,7 @@ void drm_gem_map_detach(struct dma_buf *dma_buf,
 {
 	struct drm_gem_object *obj = dma_buf->priv;
 
-	drm_gem_unpin(obj);
+	drm_gem_unpin(obj, attach->dev);
 }
 EXPORT_SYMBOL(drm_gem_map_detach);
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
index 00e8b6a817e3..44385d590aa7 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
@@ -43,7 +43,7 @@ int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
 	return etnaviv_obj->ops->mmap(etnaviv_obj, vma);
 }
 
-int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
+int etnaviv_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach) {
 		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
@@ -55,7 +55,7 @@ int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-void etnaviv_gem_prime_unpin(struct drm_gem_object *obj)
+void etnaviv_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach) {
 		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 9ada948f6b01..6f8f6df9c289 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -298,8 +298,8 @@ void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
 		struct dma_buf_attachment *attach, struct sg_table *sg);
-int msm_gem_prime_pin(struct drm_gem_object *obj);
-void msm_gem_prime_unpin(struct drm_gem_object *obj);
+int msm_gem_prime_pin(struct drm_gem_object *obj, struct device *dev);
+void msm_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev);
 void *msm_gem_get_vaddr(struct drm_gem_object *obj);
 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj);
 void msm_gem_put_vaddr(struct drm_gem_object *obj);
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index 60bb290700ce..8e0ddf5c9460 100644
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -58,14 +58,14 @@ struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
 	return msm_gem_import(dev, attach->dmabuf, sg);
 }
 
-int msm_gem_prime_pin(struct drm_gem_object *obj)
+int msm_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach)
 		msm_gem_get_pages(obj);
 	return 0;
 }
 
-void msm_gem_prime_unpin(struct drm_gem_object *obj)
+void msm_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach)
 		msm_gem_put_pages(obj);
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.h b/drivers/gpu/drm/nouveau/nouveau_gem.h
index fe39998f65cc..91dcf89138f1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.h
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.h
@@ -32,9 +32,9 @@ extern int nouveau_gem_ioctl_cpu_fini(struct drm_device *, void *,
 extern int nouveau_gem_ioctl_info(struct drm_device *, void *,
 				  struct drm_file *);
 
-extern int nouveau_gem_prime_pin(struct drm_gem_object *);
+extern int nouveau_gem_prime_pin(struct drm_gem_object *, struct device *);
 struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *);
-extern void nouveau_gem_prime_unpin(struct drm_gem_object *);
+extern void nouveau_gem_prime_unpin(struct drm_gem_object *, struct device *);
 extern struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *);
 extern struct drm_gem_object *nouveau_gem_prime_import_sg_table(
 	struct drm_device *, struct dma_buf_attachment *, struct sg_table *);
diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c
index 1fefc93af1d7..dec2d5e37b34 100644
--- a/drivers/gpu/drm/nouveau/nouveau_prime.c
+++ b/drivers/gpu/drm/nouveau/nouveau_prime.c
@@ -88,7 +88,7 @@ struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
 	return &nvbo->gem;
 }
 
-int nouveau_gem_prime_pin(struct drm_gem_object *obj)
+int nouveau_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 	int ret;
@@ -101,7 +101,7 @@ int nouveau_gem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
+void nouveau_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 
diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c
index 7d3816fca5a8..21e9b44eb2e4 100644
--- a/drivers/gpu/drm/qxl/qxl_prime.c
+++ b/drivers/gpu/drm/qxl/qxl_prime.c
@@ -28,14 +28,14 @@
 /* Empty Implementations as there should not be any other driver for a virtual
  * device that might share buffers with qxl */
 
-int qxl_gem_prime_pin(struct drm_gem_object *obj)
+int qxl_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
 	return qxl_bo_pin(bo);
 }
 
-void qxl_gem_prime_unpin(struct drm_gem_object *obj)
+void qxl_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c
index d3a5bea9a2c5..2d3eadcf0f2d 100644
--- a/drivers/gpu/drm/radeon/radeon_prime.c
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -83,7 +83,7 @@ struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
 	return &bo->gem_base;
 }
 
-int radeon_gem_prime_pin(struct drm_gem_object *obj)
+int radeon_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 	int ret = 0;
@@ -101,7 +101,7 @@ int radeon_gem_prime_pin(struct drm_gem_object *obj)
 	return ret;
 }
 
-void radeon_gem_prime_unpin(struct drm_gem_object *obj)
+void radeon_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 	int ret = 0;
diff --git a/drivers/gpu/drm/vboxvideo/vbox_prime.c b/drivers/gpu/drm/vboxvideo/vbox_prime.c
index 702b1aa53494..ad6de9a41950 100644
--- a/drivers/gpu/drm/vboxvideo/vbox_prime.c
+++ b/drivers/gpu/drm/vboxvideo/vbox_prime.c
@@ -13,13 +13,13 @@
  * device that might share buffers with vboxvideo
  */
 
-int vbox_gem_prime_pin(struct drm_gem_object *obj)
+int vbox_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	WARN_ONCE(1, "not implemented");
 	return -ENODEV;
 }
 
-void vbox_gem_prime_unpin(struct drm_gem_object *obj)
+void vbox_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	WARN_ONCE(1, "not implemented");
 }
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 11a8f99ba18c..a179e962b79e 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -307,7 +307,7 @@ static void vgem_unpin_pages(struct drm_vgem_gem_object *bo)
 	mutex_unlock(&bo->pages_lock);
 }
 
-static int vgem_prime_pin(struct drm_gem_object *obj)
+static int vgem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
 	long n_pages = obj->size >> PAGE_SHIFT;
@@ -325,7 +325,7 @@ static int vgem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-static void vgem_prime_unpin(struct drm_gem_object *obj)
+static void vgem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
 
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 68ca736c548d..6a9489b9532f 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -584,8 +584,8 @@ struct drm_driver {
 	 */
 	struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
 				struct dma_buf *dma_buf);
-	int (*gem_prime_pin)(struct drm_gem_object *obj);
-	void (*gem_prime_unpin)(struct drm_gem_object *obj);
+	int (*gem_prime_pin)(struct drm_gem_object *obj, struct device *dev);
+	void (*gem_prime_unpin)(struct drm_gem_object *obj, struct device *dev);
 	struct reservation_object * (*gem_prime_res_obj)(
 				struct drm_gem_object *obj);
 	struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 5047c7ee25f5..ebd12be354d2 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -401,8 +401,8 @@ int drm_gem_dumb_destroy(struct drm_file *file,
 			 struct drm_device *dev,
 			 uint32_t handle);
 
-int drm_gem_pin(struct drm_gem_object *obj);
-void drm_gem_unpin(struct drm_gem_object *obj);
+int drm_gem_pin(struct drm_gem_object *obj, struct device *dev);
+void drm_gem_unpin(struct drm_gem_object *obj, struct device *dev);
 void *drm_gem_vmap(struct drm_gem_object *obj);
 void drm_gem_vunmap(struct drm_gem_object *obj, void *vaddr);
 
diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
index 9581ea0a4f7e..33556e157202 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -133,8 +133,8 @@ int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
  * PRIME helpers for struct drm_driver
  */
 
-int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj);
-void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj);
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj, struct device *dev);
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev);
 void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj);
 void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj,
 					  void *vaddr);
-- 
2.21.0

[PATCH v2 2/3] drm: plumb attaching dev thru to prime_pin/unpin

[Rob Clark]

From: Rob Clark <robdclark@chromium.org>

Needed in the following patch for cache operations.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/drm_gem.c                   | 10 ++++++----
 drivers/gpu/drm/drm_gem_vram_helper.c       |  6 ++++--
 drivers/gpu/drm/drm_prime.c                 |  4 ++--
 drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c |  4 ++--
 drivers/gpu/drm/msm/msm_drv.h               |  4 ++--
 drivers/gpu/drm/msm/msm_gem_prime.c         |  4 ++--
 drivers/gpu/drm/nouveau/nouveau_gem.h       |  4 ++--
 drivers/gpu/drm/nouveau/nouveau_prime.c     |  4 ++--
 drivers/gpu/drm/qxl/qxl_prime.c             |  4 ++--
 drivers/gpu/drm/radeon/radeon_prime.c       |  4 ++--
 drivers/gpu/drm/vboxvideo/vbox_prime.c      |  4 ++--
 drivers/gpu/drm/vgem/vgem_drv.c             |  4 ++--
 include/drm/drm_drv.h                       |  4 ++--
 include/drm/drm_gem.h                       |  4 ++--
 include/drm/drm_gem_vram_helper.h           |  4 ++--
 15 files changed, 36 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 7d6242cc69f2..0a2645769624 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1219,18 +1219,19 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
 /**
  * drm_gem_pin - Pin backing buffer in memory
  * @obj: GEM object
+ * @dev: the device the buffer is being pinned for
  *
  * Make sure the backing buffer is pinned in memory.
  *
  * Returns:
  * 0 on success or a negative error code on failure.
  */
-int drm_gem_pin(struct drm_gem_object *obj)
+int drm_gem_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (obj->funcs && obj->funcs->pin)
 		return obj->funcs->pin(obj);
 	else if (obj->dev->driver->gem_prime_pin)
-		return obj->dev->driver->gem_prime_pin(obj);
+		return obj->dev->driver->gem_prime_pin(obj, dev);
 	else
 		return 0;
 }
@@ -1239,15 +1240,16 @@ EXPORT_SYMBOL(drm_gem_pin);
 /**
  * drm_gem_unpin - Unpin backing buffer from memory
  * @obj: GEM object
+ * @dev: the device the buffer is being pinned for
  *
  * Relax the requirement that the backing buffer is pinned in memory.
  */
-void drm_gem_unpin(struct drm_gem_object *obj)
+void drm_gem_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (obj->funcs && obj->funcs->unpin)
 		obj->funcs->unpin(obj);
 	else if (obj->dev->driver->gem_prime_unpin)
-		obj->dev->driver->gem_prime_unpin(obj);
+		obj->dev->driver->gem_prime_unpin(obj, dev);
 }
 EXPORT_SYMBOL(drm_gem_unpin);
 
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index 4de782ca26b2..62fafec93948 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -548,7 +548,8 @@ EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);
  * 0 on success, or
  * a negative errno code otherwise.
  */
-int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem)
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem,
+				      struct device *dev)
 {
 	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
 
@@ -569,7 +570,8 @@ EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_pin);
 	Implements &struct drm_driver.gem_prime_unpin
  * @gem:	The GEM object to unpin
  */
-void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem)
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem,
+					 struct device *dev)
 {
 	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
 
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index d0c01318076b..505893cfac8e 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -196,7 +196,7 @@ int drm_gem_map_attach(struct dma_buf *dma_buf,
 {
 	struct drm_gem_object *obj = dma_buf->priv;
 
-	return drm_gem_pin(obj);
+	return drm_gem_pin(obj, attach->dev);
 }
 EXPORT_SYMBOL(drm_gem_map_attach);
 
@@ -213,7 +213,7 @@ void drm_gem_map_detach(struct dma_buf *dma_buf,
 {
 	struct drm_gem_object *obj = dma_buf->priv;
 
-	drm_gem_unpin(obj);
+	drm_gem_unpin(obj, attach->dev);
 }
 EXPORT_SYMBOL(drm_gem_map_detach);
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
index 00e8b6a817e3..44385d590aa7 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
@@ -43,7 +43,7 @@ int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
 	return etnaviv_obj->ops->mmap(etnaviv_obj, vma);
 }
 
-int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
+int etnaviv_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach) {
 		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
@@ -55,7 +55,7 @@ int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-void etnaviv_gem_prime_unpin(struct drm_gem_object *obj)
+void etnaviv_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach) {
 		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 9ada948f6b01..6f8f6df9c289 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -298,8 +298,8 @@ void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
 		struct dma_buf_attachment *attach, struct sg_table *sg);
-int msm_gem_prime_pin(struct drm_gem_object *obj);
-void msm_gem_prime_unpin(struct drm_gem_object *obj);
+int msm_gem_prime_pin(struct drm_gem_object *obj, struct device *dev);
+void msm_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev);
 void *msm_gem_get_vaddr(struct drm_gem_object *obj);
 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj);
 void msm_gem_put_vaddr(struct drm_gem_object *obj);
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index 60bb290700ce..8e0ddf5c9460 100644
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -58,14 +58,14 @@ struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
 	return msm_gem_import(dev, attach->dmabuf, sg);
 }
 
-int msm_gem_prime_pin(struct drm_gem_object *obj)
+int msm_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach)
 		msm_gem_get_pages(obj);
 	return 0;
 }
 
-void msm_gem_prime_unpin(struct drm_gem_object *obj)
+void msm_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach)
 		msm_gem_put_pages(obj);
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.h b/drivers/gpu/drm/nouveau/nouveau_gem.h
index fe39998f65cc..91dcf89138f1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.h
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.h
@@ -32,9 +32,9 @@ extern int nouveau_gem_ioctl_cpu_fini(struct drm_device *, void *,
 extern int nouveau_gem_ioctl_info(struct drm_device *, void *,
 				  struct drm_file *);
 
-extern int nouveau_gem_prime_pin(struct drm_gem_object *);
+extern int nouveau_gem_prime_pin(struct drm_gem_object *, struct device *);
 struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *);
-extern void nouveau_gem_prime_unpin(struct drm_gem_object *);
+extern void nouveau_gem_prime_unpin(struct drm_gem_object *, struct device *);
 extern struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *);
 extern struct drm_gem_object *nouveau_gem_prime_import_sg_table(
 	struct drm_device *, struct dma_buf_attachment *, struct sg_table *);
diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c
index 1fefc93af1d7..dec2d5e37b34 100644
--- a/drivers/gpu/drm/nouveau/nouveau_prime.c
+++ b/drivers/gpu/drm/nouveau/nouveau_prime.c
@@ -88,7 +88,7 @@ struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
 	return &nvbo->gem;
 }
 
-int nouveau_gem_prime_pin(struct drm_gem_object *obj)
+int nouveau_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 	int ret;
@@ -101,7 +101,7 @@ int nouveau_gem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
+void nouveau_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 
diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c
index 7d3816fca5a8..21e9b44eb2e4 100644
--- a/drivers/gpu/drm/qxl/qxl_prime.c
+++ b/drivers/gpu/drm/qxl/qxl_prime.c
@@ -28,14 +28,14 @@
 /* Empty Implementations as there should not be any other driver for a virtual
  * device that might share buffers with qxl */
 
-int qxl_gem_prime_pin(struct drm_gem_object *obj)
+int qxl_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
 	return qxl_bo_pin(bo);
 }
 
-void qxl_gem_prime_unpin(struct drm_gem_object *obj)
+void qxl_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c
index d3a5bea9a2c5..2d3eadcf0f2d 100644
--- a/drivers/gpu/drm/radeon/radeon_prime.c
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -83,7 +83,7 @@ struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
 	return &bo->gem_base;
 }
 
-int radeon_gem_prime_pin(struct drm_gem_object *obj)
+int radeon_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 	int ret = 0;
@@ -101,7 +101,7 @@ int radeon_gem_prime_pin(struct drm_gem_object *obj)
 	return ret;
 }
 
-void radeon_gem_prime_unpin(struct drm_gem_object *obj)
+void radeon_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 	int ret = 0;
diff --git a/drivers/gpu/drm/vboxvideo/vbox_prime.c b/drivers/gpu/drm/vboxvideo/vbox_prime.c
index 702b1aa53494..ad6de9a41950 100644
--- a/drivers/gpu/drm/vboxvideo/vbox_prime.c
+++ b/drivers/gpu/drm/vboxvideo/vbox_prime.c
@@ -13,13 +13,13 @@
  * device that might share buffers with vboxvideo
  */
 
-int vbox_gem_prime_pin(struct drm_gem_object *obj)
+int vbox_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	WARN_ONCE(1, "not implemented");
 	return -ENODEV;
 }
 
-void vbox_gem_prime_unpin(struct drm_gem_object *obj)
+void vbox_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	WARN_ONCE(1, "not implemented");
 }
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 11a8f99ba18c..a179e962b79e 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -307,7 +307,7 @@ static void vgem_unpin_pages(struct drm_vgem_gem_object *bo)
 	mutex_unlock(&bo->pages_lock);
 }
 
-static int vgem_prime_pin(struct drm_gem_object *obj)
+static int vgem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
 	long n_pages = obj->size >> PAGE_SHIFT;
@@ -325,7 +325,7 @@ static int vgem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-static void vgem_prime_unpin(struct drm_gem_object *obj)
+static void vgem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
 
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 68ca736c548d..6a9489b9532f 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -584,8 +584,8 @@ struct drm_driver {
 	 */
 	struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
 				struct dma_buf *dma_buf);
-	int (*gem_prime_pin)(struct drm_gem_object *obj);
-	void (*gem_prime_unpin)(struct drm_gem_object *obj);
+	int (*gem_prime_pin)(struct drm_gem_object *obj, struct device *dev);
+	void (*gem_prime_unpin)(struct drm_gem_object *obj, struct device *dev);
 	struct reservation_object * (*gem_prime_res_obj)(
 				struct drm_gem_object *obj);
 	struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 5047c7ee25f5..ebd12be354d2 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -401,8 +401,8 @@ int drm_gem_dumb_destroy(struct drm_file *file,
 			 struct drm_device *dev,
 			 uint32_t handle);
 
-int drm_gem_pin(struct drm_gem_object *obj);
-void drm_gem_unpin(struct drm_gem_object *obj);
+int drm_gem_pin(struct drm_gem_object *obj, struct device *dev);
+void drm_gem_unpin(struct drm_gem_object *obj, struct device *dev);
 void *drm_gem_vmap(struct drm_gem_object *obj);
 void drm_gem_vunmap(struct drm_gem_object *obj, void *vaddr);
 
diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
index 9581ea0a4f7e..33556e157202 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -133,8 +133,8 @@ int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
  * PRIME helpers for struct drm_driver
  */
 
-int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj);
-void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj);
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj, struct device *dev);
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev);
 void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj);
 void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj,
 					  void *vaddr);
-- 
2.21.0

[PATCH v2 2/3] drm: plumb attaching dev thru to prime_pin/unpin

[Rob Clark]

From: Rob Clark <robdclark@chromium.org>

Needed in the following patch for cache operations.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/drm_gem.c                   | 10 ++++++----
 drivers/gpu/drm/drm_gem_vram_helper.c       |  6 ++++--
 drivers/gpu/drm/drm_prime.c                 |  4 ++--
 drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c |  4 ++--
 drivers/gpu/drm/msm/msm_drv.h               |  4 ++--
 drivers/gpu/drm/msm/msm_gem_prime.c         |  4 ++--
 drivers/gpu/drm/nouveau/nouveau_gem.h       |  4 ++--
 drivers/gpu/drm/nouveau/nouveau_prime.c     |  4 ++--
 drivers/gpu/drm/qxl/qxl_prime.c             |  4 ++--
 drivers/gpu/drm/radeon/radeon_prime.c       |  4 ++--
 drivers/gpu/drm/vboxvideo/vbox_prime.c      |  4 ++--
 drivers/gpu/drm/vgem/vgem_drv.c             |  4 ++--
 include/drm/drm_drv.h                       |  4 ++--
 include/drm/drm_gem.h                       |  4 ++--
 include/drm/drm_gem_vram_helper.h           |  4 ++--
 15 files changed, 36 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 7d6242cc69f2..0a2645769624 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1219,18 +1219,19 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
 /**
  * drm_gem_pin - Pin backing buffer in memory
  * @obj: GEM object
+ * @dev: the device the buffer is being pinned for
  *
  * Make sure the backing buffer is pinned in memory.
  *
  * Returns:
  * 0 on success or a negative error code on failure.
  */
-int drm_gem_pin(struct drm_gem_object *obj)
+int drm_gem_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (obj->funcs && obj->funcs->pin)
 		return obj->funcs->pin(obj);
 	else if (obj->dev->driver->gem_prime_pin)
-		return obj->dev->driver->gem_prime_pin(obj);
+		return obj->dev->driver->gem_prime_pin(obj, dev);
 	else
 		return 0;
 }
@@ -1239,15 +1240,16 @@ EXPORT_SYMBOL(drm_gem_pin);
 /**
  * drm_gem_unpin - Unpin backing buffer from memory
  * @obj: GEM object
+ * @dev: the device the buffer is being pinned for
  *
  * Relax the requirement that the backing buffer is pinned in memory.
  */
-void drm_gem_unpin(struct drm_gem_object *obj)
+void drm_gem_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (obj->funcs && obj->funcs->unpin)
 		obj->funcs->unpin(obj);
 	else if (obj->dev->driver->gem_prime_unpin)
-		obj->dev->driver->gem_prime_unpin(obj);
+		obj->dev->driver->gem_prime_unpin(obj, dev);
 }
 EXPORT_SYMBOL(drm_gem_unpin);
 
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index 4de782ca26b2..62fafec93948 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -548,7 +548,8 @@ EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);
  * 0 on success, or
  * a negative errno code otherwise.
  */
-int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem)
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem,
+				      struct device *dev)
 {
 	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
 
@@ -569,7 +570,8 @@ EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_pin);
 	Implements &struct drm_driver.gem_prime_unpin
  * @gem:	The GEM object to unpin
  */
-void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem)
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem,
+					 struct device *dev)
 {
 	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
 
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index d0c01318076b..505893cfac8e 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -196,7 +196,7 @@ int drm_gem_map_attach(struct dma_buf *dma_buf,
 {
 	struct drm_gem_object *obj = dma_buf->priv;
 
-	return drm_gem_pin(obj);
+	return drm_gem_pin(obj, attach->dev);
 }
 EXPORT_SYMBOL(drm_gem_map_attach);
 
@@ -213,7 +213,7 @@ void drm_gem_map_detach(struct dma_buf *dma_buf,
 {
 	struct drm_gem_object *obj = dma_buf->priv;
 
-	drm_gem_unpin(obj);
+	drm_gem_unpin(obj, attach->dev);
 }
 EXPORT_SYMBOL(drm_gem_map_detach);
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
index 00e8b6a817e3..44385d590aa7 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
@@ -43,7 +43,7 @@ int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
 	return etnaviv_obj->ops->mmap(etnaviv_obj, vma);
 }
 
-int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
+int etnaviv_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach) {
 		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
@@ -55,7 +55,7 @@ int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-void etnaviv_gem_prime_unpin(struct drm_gem_object *obj)
+void etnaviv_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach) {
 		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 9ada948f6b01..6f8f6df9c289 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -298,8 +298,8 @@ void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
 		struct dma_buf_attachment *attach, struct sg_table *sg);
-int msm_gem_prime_pin(struct drm_gem_object *obj);
-void msm_gem_prime_unpin(struct drm_gem_object *obj);
+int msm_gem_prime_pin(struct drm_gem_object *obj, struct device *dev);
+void msm_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev);
 void *msm_gem_get_vaddr(struct drm_gem_object *obj);
 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj);
 void msm_gem_put_vaddr(struct drm_gem_object *obj);
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index 60bb290700ce..8e0ddf5c9460 100644
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -58,14 +58,14 @@ struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
 	return msm_gem_import(dev, attach->dmabuf, sg);
 }
 
-int msm_gem_prime_pin(struct drm_gem_object *obj)
+int msm_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach)
 		msm_gem_get_pages(obj);
 	return 0;
 }
 
-void msm_gem_prime_unpin(struct drm_gem_object *obj)
+void msm_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	if (!obj->import_attach)
 		msm_gem_put_pages(obj);
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.h b/drivers/gpu/drm/nouveau/nouveau_gem.h
index fe39998f65cc..91dcf89138f1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.h
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.h
@@ -32,9 +32,9 @@ extern int nouveau_gem_ioctl_cpu_fini(struct drm_device *, void *,
 extern int nouveau_gem_ioctl_info(struct drm_device *, void *,
 				  struct drm_file *);
 
-extern int nouveau_gem_prime_pin(struct drm_gem_object *);
+extern int nouveau_gem_prime_pin(struct drm_gem_object *, struct device *);
 struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *);
-extern void nouveau_gem_prime_unpin(struct drm_gem_object *);
+extern void nouveau_gem_prime_unpin(struct drm_gem_object *, struct device *);
 extern struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *);
 extern struct drm_gem_object *nouveau_gem_prime_import_sg_table(
 	struct drm_device *, struct dma_buf_attachment *, struct sg_table *);
diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c
index 1fefc93af1d7..dec2d5e37b34 100644
--- a/drivers/gpu/drm/nouveau/nouveau_prime.c
+++ b/drivers/gpu/drm/nouveau/nouveau_prime.c
@@ -88,7 +88,7 @@ struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
 	return &nvbo->gem;
 }
 
-int nouveau_gem_prime_pin(struct drm_gem_object *obj)
+int nouveau_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 	int ret;
@@ -101,7 +101,7 @@ int nouveau_gem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
+void nouveau_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
 
diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c
index 7d3816fca5a8..21e9b44eb2e4 100644
--- a/drivers/gpu/drm/qxl/qxl_prime.c
+++ b/drivers/gpu/drm/qxl/qxl_prime.c
@@ -28,14 +28,14 @@
 /* Empty Implementations as there should not be any other driver for a virtual
  * device that might share buffers with qxl */
 
-int qxl_gem_prime_pin(struct drm_gem_object *obj)
+int qxl_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
 	return qxl_bo_pin(bo);
 }
 
-void qxl_gem_prime_unpin(struct drm_gem_object *obj)
+void qxl_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c
index d3a5bea9a2c5..2d3eadcf0f2d 100644
--- a/drivers/gpu/drm/radeon/radeon_prime.c
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -83,7 +83,7 @@ struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
 	return &bo->gem_base;
 }
 
-int radeon_gem_prime_pin(struct drm_gem_object *obj)
+int radeon_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 	int ret = 0;
@@ -101,7 +101,7 @@ int radeon_gem_prime_pin(struct drm_gem_object *obj)
 	return ret;
 }
 
-void radeon_gem_prime_unpin(struct drm_gem_object *obj)
+void radeon_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 	int ret = 0;
diff --git a/drivers/gpu/drm/vboxvideo/vbox_prime.c b/drivers/gpu/drm/vboxvideo/vbox_prime.c
index 702b1aa53494..ad6de9a41950 100644
--- a/drivers/gpu/drm/vboxvideo/vbox_prime.c
+++ b/drivers/gpu/drm/vboxvideo/vbox_prime.c
@@ -13,13 +13,13 @@
  * device that might share buffers with vboxvideo
  */
 
-int vbox_gem_prime_pin(struct drm_gem_object *obj)
+int vbox_gem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	WARN_ONCE(1, "not implemented");
 	return -ENODEV;
 }
 
-void vbox_gem_prime_unpin(struct drm_gem_object *obj)
+void vbox_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	WARN_ONCE(1, "not implemented");
 }
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 11a8f99ba18c..a179e962b79e 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -307,7 +307,7 @@ static void vgem_unpin_pages(struct drm_vgem_gem_object *bo)
 	mutex_unlock(&bo->pages_lock);
 }
 
-static int vgem_prime_pin(struct drm_gem_object *obj)
+static int vgem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
 	long n_pages = obj->size >> PAGE_SHIFT;
@@ -325,7 +325,7 @@ static int vgem_prime_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-static void vgem_prime_unpin(struct drm_gem_object *obj)
+static void vgem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
 
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 68ca736c548d..6a9489b9532f 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -584,8 +584,8 @@ struct drm_driver {
 	 */
 	struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
 				struct dma_buf *dma_buf);
-	int (*gem_prime_pin)(struct drm_gem_object *obj);
-	void (*gem_prime_unpin)(struct drm_gem_object *obj);
+	int (*gem_prime_pin)(struct drm_gem_object *obj, struct device *dev);
+	void (*gem_prime_unpin)(struct drm_gem_object *obj, struct device *dev);
 	struct reservation_object * (*gem_prime_res_obj)(
 				struct drm_gem_object *obj);
 	struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 5047c7ee25f5..ebd12be354d2 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -401,8 +401,8 @@ int drm_gem_dumb_destroy(struct drm_file *file,
 			 struct drm_device *dev,
 			 uint32_t handle);
 
-int drm_gem_pin(struct drm_gem_object *obj);
-void drm_gem_unpin(struct drm_gem_object *obj);
+int drm_gem_pin(struct drm_gem_object *obj, struct device *dev);
+void drm_gem_unpin(struct drm_gem_object *obj, struct device *dev);
 void *drm_gem_vmap(struct drm_gem_object *obj);
 void drm_gem_vunmap(struct drm_gem_object *obj, void *vaddr);
 
diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
index 9581ea0a4f7e..33556e157202 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -133,8 +133,8 @@ int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
  * PRIME helpers for struct drm_driver
  */
 
-int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj);
-void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj);
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj, struct device *dev);
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj, struct device *dev);
 void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj);
 void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj,
 					  void *vaddr);
-- 
2.21.0

Re: [PATCH v2 2/3] drm: plumb attaching dev thru to prime_pin/unpin

[Chris Wilson]

Quoting Rob Clark (2019-07-16 18:43:22)
> From: Rob Clark <robdclark@chromium.org>
> 
> Needed in the following patch for cache operations.

What's the base for this patch? (I'm missing the ancestor for drm_gem.c)
-Chris

Re: [PATCH v2 2/3] drm: plumb attaching dev thru to prime_pin/unpin

[Chris Wilson]

Quoting Rob Clark (2019-07-16 18:43:22)
> From: Rob Clark <robdclark@chromium.org>
> 
> Needed in the following patch for cache operations.

What's the base for this patch? (I'm missing the ancestor for drm_gem.c)
-Chris
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Re: [PATCH v2 2/3] drm: plumb attaching dev thru to prime_pin/unpin

[Chris Wilson]

Quoting Rob Clark (2019-07-16 18:43:22)
> From: Rob Clark <robdclark@chromium.org>
> 
> Needed in the following patch for cache operations.

What's the base for this patch? (I'm missing the ancestor for drm_gem.c)
-Chris

[PATCH v2 3/3] drm/vgem: use normal cached mmap'ings

[Rob Clark]

From: Rob Clark <robdclark@chromium.org>

Since there is no real device associated with VGEM, it is impossible to
end up with appropriate dev->dma_ops, meaning that we have no way to
invalidate the shmem pages allocated by VGEM.  So, at least on platforms
without drm_cflush_pages(), we end up with corruption when cache lines
from previous usage of VGEM bo pages get evicted to memory.

The only sane option is to use cached mappings.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/vgem/vgem_drv.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index a179e962b79e..b6071a466b92 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -259,9 +259,6 @@ static int vgem_mmap(struct file *filp, struct vm_area_struct *vma)
 	if (ret)
 		return ret;
 
-	/* Keep the WC mmaping set by drm_gem_mmap() but our pages
-	 * are ordinary and not special.
-	 */
 	vma->vm_flags = flags | VM_DONTEXPAND | VM_DONTDUMP;
 	return 0;
 }
@@ -310,17 +307,17 @@ static void vgem_unpin_pages(struct drm_vgem_gem_object *bo)
 static int vgem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
-	long n_pages = obj->size >> PAGE_SHIFT;
+	long i, n_pages = obj->size >> PAGE_SHIFT;
 	struct page **pages;
 
 	pages = vgem_pin_pages(bo);
 	if (IS_ERR(pages))
 		return PTR_ERR(pages);
 
-	/* Flush the object from the CPU cache so that importers can rely
-	 * on coherent indirect access via the exported dma-address.
-	 */
-	drm_clflush_pages(pages, n_pages);
+	for (i = 0; i < n_pages; i++) {
+		dma_sync_single_for_device(dev, page_to_phys(pages[i]),
+					   PAGE_SIZE, DMA_BIDIRECTIONAL);
+	}
 
 	return 0;
 }
@@ -328,6 +325,13 @@ static int vgem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 static void vgem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
+	long i, n_pages = obj->size >> PAGE_SHIFT;
+	struct page **pages = bo->pages;
+
+	for (i = 0; i < n_pages; i++) {
+		dma_sync_single_for_cpu(dev, page_to_phys(pages[i]),
+					PAGE_SIZE, DMA_BIDIRECTIONAL);
+	}
 
 	vgem_unpin_pages(bo);
 }
@@ -382,7 +386,7 @@ static void *vgem_prime_vmap(struct drm_gem_object *obj)
 	if (IS_ERR(pages))
 		return NULL;
 
-	return vmap(pages, n_pages, 0, pgprot_writecombine(PAGE_KERNEL));
+	return vmap(pages, n_pages, 0, PAGE_KERNEL);
 }
 
 static void vgem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
@@ -411,7 +415,7 @@ static int vgem_prime_mmap(struct drm_gem_object *obj,
 	fput(vma->vm_file);
 	vma->vm_file = get_file(obj->filp);
 	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
-	vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
+	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
 
 	return 0;
 }
-- 
2.21.0

[PATCH v2 3/3] drm/vgem: use normal cached mmap'ings

[Rob Clark]

From: Rob Clark <robdclark@chromium.org>

Since there is no real device associated with VGEM, it is impossible to
end up with appropriate dev->dma_ops, meaning that we have no way to
invalidate the shmem pages allocated by VGEM.  So, at least on platforms
without drm_cflush_pages(), we end up with corruption when cache lines
from previous usage of VGEM bo pages get evicted to memory.

The only sane option is to use cached mappings.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/vgem/vgem_drv.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index a179e962b79e..b6071a466b92 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -259,9 +259,6 @@ static int vgem_mmap(struct file *filp, struct vm_area_struct *vma)
 	if (ret)
 		return ret;
 
-	/* Keep the WC mmaping set by drm_gem_mmap() but our pages
-	 * are ordinary and not special.
-	 */
 	vma->vm_flags = flags | VM_DONTEXPAND | VM_DONTDUMP;
 	return 0;
 }
@@ -310,17 +307,17 @@ static void vgem_unpin_pages(struct drm_vgem_gem_object *bo)
 static int vgem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
-	long n_pages = obj->size >> PAGE_SHIFT;
+	long i, n_pages = obj->size >> PAGE_SHIFT;
 	struct page **pages;
 
 	pages = vgem_pin_pages(bo);
 	if (IS_ERR(pages))
 		return PTR_ERR(pages);
 
-	/* Flush the object from the CPU cache so that importers can rely
-	 * on coherent indirect access via the exported dma-address.
-	 */
-	drm_clflush_pages(pages, n_pages);
+	for (i = 0; i < n_pages; i++) {
+		dma_sync_single_for_device(dev, page_to_phys(pages[i]),
+					   PAGE_SIZE, DMA_BIDIRECTIONAL);
+	}
 
 	return 0;
 }
@@ -328,6 +325,13 @@ static int vgem_prime_pin(struct drm_gem_object *obj, struct device *dev)
 static void vgem_prime_unpin(struct drm_gem_object *obj, struct device *dev)
 {
 	struct drm_vgem_gem_object *bo = to_vgem_bo(obj);
+	long i, n_pages = obj->size >> PAGE_SHIFT;
+	struct page **pages = bo->pages;
+
+	for (i = 0; i < n_pages; i++) {
+		dma_sync_single_for_cpu(dev, page_to_phys(pages[i]),
+					PAGE_SIZE, DMA_BIDIRECTIONAL);
+	}
 
 	vgem_unpin_pages(bo);
 }
@@ -382,7 +386,7 @@ static void *vgem_prime_vmap(struct drm_gem_object *obj)
 	if (IS_ERR(pages))
 		return NULL;
 
-	return vmap(pages, n_pages, 0, pgprot_writecombine(PAGE_KERNEL));
+	return vmap(pages, n_pages, 0, PAGE_KERNEL);
 }
 
 static void vgem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
@@ -411,7 +415,7 @@ static int vgem_prime_mmap(struct drm_gem_object *obj,
 	fput(vma->vm_file);
 	vma->vm_file = get_file(obj->filp);
 	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
-	vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
+	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
 
 	return 0;
 }
-- 
2.21.0

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