aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/gpu/drm-mm.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/gpu/drm-mm.rst')
-rw-r--r--Documentation/gpu/drm-mm.rst74
1 files changed, 37 insertions, 37 deletions
diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst
index 54a696d961a7..b664f054c259 100644
--- a/Documentation/gpu/drm-mm.rst
+++ b/Documentation/gpu/drm-mm.rst
@@ -79,7 +79,6 @@ count for the TTM, which will call your initialization function.
See the radeon_ttm.c file for an example of usage.
-
The Graphics Execution Manager (GEM)
====================================
@@ -380,6 +379,39 @@ GEM CMA Helper Functions Reference
.. kernel-doc:: drivers/gpu/drm/drm_gem_cma_helper.c
:export:
+VRAM Helper Function Reference
+==============================
+
+.. kernel-doc:: drivers/gpu/drm/drm_vram_helper_common.c
+ :doc: overview
+
+.. kernel-doc:: include/drm/drm_gem_vram_helper.h
+ :internal:
+
+GEM VRAM Helper Functions Reference
+-----------------------------------
+
+.. kernel-doc:: drivers/gpu/drm/drm_gem_vram_helper.c
+ :doc: overview
+
+.. kernel-doc:: include/drm/drm_gem_vram_helper.h
+ :internal:
+
+.. kernel-doc:: drivers/gpu/drm/drm_gem_vram_helper.c
+ :export:
+
+VRAM MM Helper Functions Reference
+----------------------------------
+
+.. kernel-doc:: drivers/gpu/drm/drm_vram_mm_helper.c
+ :doc: overview
+
+.. kernel-doc:: include/drm/drm_vram_mm_helper.h
+ :internal:
+
+.. kernel-doc:: drivers/gpu/drm/drm_vram_mm_helper.c
+ :export:
+
VMA Offset Manager
==================
@@ -401,43 +433,11 @@ PRIME is the cross device buffer sharing framework in drm, originally
created for the OPTIMUS range of multi-gpu platforms. To userspace PRIME
buffers are dma-buf based file descriptors.
-Overview and Driver Interface
------------------------------
+Overview and Lifetime Rules
+---------------------------
-Similar to GEM global names, PRIME file descriptors are also used to
-share buffer objects across processes. They offer additional security:
-as file descriptors must be explicitly sent over UNIX domain sockets to
-be shared between applications, they can't be guessed like the globally
-unique GEM names.
-
-Drivers that support the PRIME API must set the DRIVER_PRIME bit in the
-struct :c:type:`struct drm_driver <drm_driver>`
-driver_features field, and implement the prime_handle_to_fd and
-prime_fd_to_handle operations.
-
-int (\*prime_handle_to_fd)(struct drm_device \*dev, struct drm_file
-\*file_priv, uint32_t handle, uint32_t flags, int \*prime_fd); int
-(\*prime_fd_to_handle)(struct drm_device \*dev, struct drm_file
-\*file_priv, int prime_fd, uint32_t \*handle); Those two operations
-convert a handle to a PRIME file descriptor and vice versa. Drivers must
-use the kernel dma-buf buffer sharing framework to manage the PRIME file
-descriptors. Similar to the mode setting API PRIME is agnostic to the
-underlying buffer object manager, as long as handles are 32bit unsigned
-integers.
-
-While non-GEM drivers must implement the operations themselves, GEM
-drivers must use the :c:func:`drm_gem_prime_handle_to_fd()` and
-:c:func:`drm_gem_prime_fd_to_handle()` helper functions. Those
-helpers rely on the driver gem_prime_export and gem_prime_import
-operations to create a dma-buf instance from a GEM object (dma-buf
-exporter role) and to create a GEM object from a dma-buf instance
-(dma-buf importer role).
-
-struct dma_buf \* (\*gem_prime_export)(struct drm_device \*dev,
-struct drm_gem_object \*obj, int flags); struct drm_gem_object \*
-(\*gem_prime_import)(struct drm_device \*dev, struct dma_buf
-\*dma_buf); These two operations are mandatory for GEM drivers that
-support PRIME.
+.. kernel-doc:: drivers/gpu/drm/drm_prime.c
+ :doc: overview and lifetime rules
PRIME Helper Functions
----------------------