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authorDave Airlie <airlied@redhat.com>2011-11-25 15:21:02 +0000
committerDave Airlie <airlied@redhat.com>2012-03-30 11:52:44 +0100
commit3248877ea1796915419fba7c89315fdbf00cb56a (patch)
tree4fab8743212004bc033e71e02a2e051b64001606 /include/drm/drmP.h
parentf52b69f86e27903d6896ed5fa7cd280fec8de532 (diff)
downloadop-kernel-dev-3248877ea1796915419fba7c89315fdbf00cb56a.zip
op-kernel-dev-3248877ea1796915419fba7c89315fdbf00cb56a.tar.gz
drm: base prime/dma-buf support (v5)
This adds the basic drm dma-buf interface layer, called PRIME. This commit doesn't add any driver support, it is simply and agreed upon starting point so we can work towards merging driver support for the next merge window. Current drivers with work done are nouveau, i915, udl, exynos and omap. The main APIs exposed to userspace allow translating a 32-bit object handle to a file descriptor, and a file descriptor to a 32-bit object handle. The flags value is currently limited to O_CLOEXEC. Acknowledgements: Daniel Vetter: lots of review Rob Clark: cleaned up lots of the internals and did lifetime review. v2: rename some functions after Chris preferred a green shed fix IS_ERR_OR_NULL -> IS_ERR v3: Fix Ville pointed out using buffer + kmalloc v4: add locking as per ickle review v5: allow re-exporting the original dma-buf (Daniel) Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Rob Clark <rob.clark@linaro.org> Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org> Reviewed-by: Inki Dae <inki.dae@samsung.com> Acked-by: Ben Widawsky <benjamin.widawsky@intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm/drmP.h')
-rw-r--r--include/drm/drmP.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 574bd1c..dd73104 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -91,6 +91,7 @@ struct drm_device;
#define DRM_UT_CORE 0x01
#define DRM_UT_DRIVER 0x02
#define DRM_UT_KMS 0x04
+#define DRM_UT_PRIME 0x08
/*
* Three debug levels are defined.
* drm_core, drm_driver, drm_kms
@@ -150,6 +151,7 @@ int drm_err(const char *func, const char *format, ...);
#define DRIVER_IRQ_VBL2 0x800
#define DRIVER_GEM 0x1000
#define DRIVER_MODESET 0x2000
+#define DRIVER_PRIME 0x4000
#define DRIVER_BUS_PCI 0x1
#define DRIVER_BUS_PLATFORM 0x2
@@ -215,6 +217,11 @@ int drm_err(const char *func, const char *format, ...);
drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
__func__, fmt, ##args); \
} while (0)
+#define DRM_DEBUG_PRIME(fmt, args...) \
+ do { \
+ drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
+ __func__, fmt, ##args); \
+ } while (0)
#define DRM_LOG(fmt, args...) \
do { \
drm_ut_debug_printk(DRM_UT_CORE, NULL, \
@@ -238,6 +245,7 @@ int drm_err(const char *func, const char *format, ...);
#else
#define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
#define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
+#define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
#define DRM_DEBUG(fmt, arg...) do { } while (0)
#define DRM_LOG(fmt, arg...) do { } while (0)
#define DRM_LOG_KMS(fmt, args...) do { } while (0)
@@ -410,6 +418,12 @@ struct drm_pending_event {
void (*destroy)(struct drm_pending_event *event);
};
+/* initial implementaton using a linked list - todo hashtab */
+struct drm_prime_file_private {
+ struct list_head head;
+ struct mutex lock;
+};
+
/** File private data */
struct drm_file {
int authenticated;
@@ -437,6 +451,8 @@ struct drm_file {
wait_queue_head_t event_wait;
struct list_head event_list;
int event_space;
+
+ struct drm_prime_file_private prime;
};
/** Wait queue */
@@ -652,6 +668,12 @@ struct drm_gem_object {
uint32_t pending_write_domain;
void *driver_private;
+
+ /* dma buf exported from this GEM object */
+ struct dma_buf *export_dma_buf;
+
+ /* dma buf attachment backing this object */
+ struct dma_buf_attachment *import_attach;
};
#include "drm_crtc.h"
@@ -890,6 +912,20 @@ struct drm_driver {
int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
+ /* prime: */
+ /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
+ int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
+ uint32_t handle, uint32_t flags, int *prime_fd);
+ /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
+ int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
+ int prime_fd, uint32_t *handle);
+ /* export GEM -> dmabuf */
+ struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
+ struct drm_gem_object *obj, int flags);
+ /* import dmabuf -> GEM */
+ struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
+ struct dma_buf *dma_buf);
+
/* vga arb irq handler */
void (*vgaarb_irq)(struct drm_device *dev, bool state);
@@ -1509,6 +1545,32 @@ extern int drm_vblank_info(struct seq_file *m, void *data);
extern int drm_clients_info(struct seq_file *m, void* data);
extern int drm_gem_name_info(struct seq_file *m, void *data);
+
+extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
+ struct drm_file *file_priv, uint32_t handle, uint32_t flags,
+ int *prime_fd);
+extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
+ struct drm_file *file_priv, int prime_fd, uint32_t *handle);
+
+extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+
+extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
+extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
+
+
+void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
+void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
+int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
+int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
+void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
+
+int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
+int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
+ struct drm_gem_object **obj);
+
#if DRM_DEBUG_CODE
extern int drm_vma_info(struct seq_file *m, void *data);
#endif
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