drm_i915_gem_relocation_entry Struct Reference

#include <i915_drm.h>

Data Fields
__u32	target_handle
__u32	delta
__u64	offset
__u64	presumed_offset
__u32	read_domains
__u32	write_domain

Detailed Description

Definition at line 485 of file i915_drm.h.

Field Documentation

__u32 delta

Value to be added to the offset of the target buffer to make up the relocation entry.

Definition at line 500 of file i915_drm.h.

__u64 offset

Offset in the buffer the relocation entry will be written into

Definition at line 503 of file i915_drm.h.

__u64 presumed_offset

Offset value of the target buffer that the relocation entry was last written as.

If the buffer has the same offset as last time, we can skip syncing and writing the relocation. This value is written back out by the execbuffer ioctl when the relocation is written.

Definition at line 513 of file i915_drm.h.

__u32 read_domains

Target memory domains read by this operation.

Definition at line 518 of file i915_drm.h.

__u32 target_handle

Handle of the buffer being pointed to by this relocation entry.

It's appealing to make this be an index into the mm_validate_entry list to refer to the buffer, but this allows the driver to create a relocation list for state buffers and not re-write it per exec using the buffer.

Definition at line 494 of file i915_drm.h.

__u32 write_domain

Target memory domains written by this operation.

Note that only one domain may be written by the whole execbuffer operation, so that where there are conflicts, the application will get -EINVAL back.

Definition at line 527 of file i915_drm.h.

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The documentation for this struct was generated from the following file:

• include/uapi/drm/i915_drm.h