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| #define | BATCH_SZ |
| #define | BATCH_RESERVED |
| struct | intel_batchbuffer |
| #define | I915_TILING_Yf |
| #define | I915_TILING_Ys |
| struct | igt_buf |
This library provides some basic support for batchbuffers and using the
blitter engine based upon libdrm. A new batchbuffer is allocated with
intel_batchbuffer_alloc() and for simple blitter commands submitted with
intel_batchbuffer_flush().
It also provides some convenient macros to easily emit commands into batchbuffers. All those macros presume that a pointer to a intel_batchbuffer structure called batch is in scope. The basic macros are BEGIN_BATCH, OUT_BATCH, OUT_RELOC and ADVANCE_BATCH.
Note that this library's header pulls in the i-g-t core library as a dependency.
struct intel_batchbuffer * intel_batchbuffer_alloc (drm_intel_bufmgr *bufmgr,uint32_t devid);
Allocates a new batchbuffer object. devid
must be supplied since libdrm
doesn't expose it directly.
void intel_batchbuffer_set_context (struct intel_batchbuffer *batch,drm_intel_context *ctx);
void
intel_batchbuffer_free (struct intel_batchbuffer *batch);
Releases all resource of the batchbuffer object batch
.
void
intel_batchbuffer_flush (struct intel_batchbuffer *batch);
Submits the batch for execution on the blitter engine, selecting the right ring depending upon the hardware platform.
void intel_batchbuffer_flush_on_ring (struct intel_batchbuffer *batch,int ring);
Submits the batch for execution on ring
.
void intel_batchbuffer_flush_with_context (struct intel_batchbuffer *batch,drm_intel_context *context);
Submits the batch for execution on the render engine with the supplied hardware context.
void
intel_batchbuffer_reset (struct intel_batchbuffer *batch);
Resets batch
by allocating a new gem buffer object as backing storage.
uint32_t intel_batchbuffer_copy_data (struct intel_batchbuffer *batch,const void *data,unsigned int bytes,uint32_t align);
This transfers the given data
into the batchbuffer. Note that the length
must be DWORD aligned, i.e. multiples of 32bits. The caller must
confirm that there is enough space in the batch for the data to be
copied.
void intel_batchbuffer_emit_reloc (struct intel_batchbuffer *batch,drm_intel_bo *buffer,uint64_t delta,uint32_t read_domains,uint32_t write_domain,int fenced);
Emits both a libdrm relocation entry pointing at buffer
and the pre-computed
DWORD of batch
's presumed gpu address plus the supplied delta
into batch
.
Note that fenced
is only relevant if buffer
is actually tiled.
This is the only way buffers get added to the validate list.
uint32_t intel_batchbuffer_align (struct intel_batchbuffer *batch,uint32_t align);
Aligns the current in-batch offset to the given value.
void * intel_batchbuffer_subdata_alloc (struct intel_batchbuffer *batch,uint32_t size,uint32_t align);
Verify if sufficient size
within batch
is available to deny overflow.
Then allocate size
bytes within batch
.
uint32_t intel_batchbuffer_subdata_offset (struct intel_batchbuffer *batch,void *ptr);
void intel_batchbuffer_emit_dword (struct intel_batchbuffer *batch,uint32_t dword);
void intel_batchbuffer_require_space (struct intel_batchbuffer *batch,unsigned int sz);
#define BEGIN_BATCH(n, r)
Prepares a batch to emit n
DWORDS, flushing it if there's not enough space
available.
This macro needs a pointer to an intel_batchbuffer structure called batch in scope.
#define OUT_BATCH(d) intel_batchbuffer_emit_dword(batch, d)
Emits d
into a batch.
This macro needs a pointer to an intel_batchbuffer structure called batch in scope.
#define OUT_RELOC_FENCED(buf, read_domains, write_domain, delta)
Emits a fenced relocation into a batch.
This macro needs a pointer to an intel_batchbuffer structure called batch in scope.
#define OUT_RELOC(buf, read_domains, write_domain, delta)
Emits a normal, unfenced relocation into a batch.
This macro needs a pointer to an intel_batchbuffer structure called batch in scope.
#define ADVANCE_BATCH()
Completes the batch command emission sequence started with BEGIN_BATCH.
This macro needs a pointer to an intel_batchbuffer structure called batch in scope.
void intel_blt_copy (struct intel_batchbuffer *batch,drm_intel_bo *src_bo,int src_x1,int src_y1,int src_pitch,drm_intel_bo *dst_bo,int dst_x1,int dst_y1,int dst_pitch,int width,int height,int bpp);
This emits a 2D copy operation using blitter commands into the supplied batch buffer object.
batch |
batchbuffer object |
|
src_bo |
source libdrm buffer object |
|
src_x1 |
source pixel x-coordination |
|
src_y1 |
source pixel y-coordination |
|
src_pitch |
|
|
dst_bo |
destination libdrm buffer object |
|
dst_x1 |
destination pixel x-coordination |
|
dst_y1 |
destination pixel y-coordination |
|
dst_pitch |
|
|
width |
width of the copied rectangle |
|
height |
height of the copied rectangle |
|
bpp |
bits per pixel |
void intel_copy_bo (struct intel_batchbuffer *batch,drm_intel_bo *dst_bo,drm_intel_bo *src_bo,long int size);
This emits a copy operation using blitter commands into the supplied batch
buffer object. A total of size
bytes from the start of src_bo
is copied
over to dst_bo
. Note that size
must be page-aligned.
unsigned
igt_buf_width (const struct igt_buf *buf);
Computes the width in 32-bit pixels of the given buffer.
unsigned
igt_buf_height (const struct igt_buf *buf);
Computes the height in 32-bit pixels of the given buffer.
void igt_blitter_fast_copy (struct intel_batchbuffer *batch,const struct igt_buf *src,unsigned src_delta,unsigned src_x,unsigned src_y,unsigned width,unsigned height,int bpp,const struct igt_buf *dst,unsigned dst_delta,unsigned dst_x,unsigned dst_y);
Copy src
into dst
using the gen9 fast copy blitter command.
The source and destination surfaces cannot overlap.
batch |
batchbuffer object |
|
src |
source i-g-t buffer object |
|
src_delta |
offset into the source i-g-t bo |
|
src_x |
source pixel x-coordination |
|
src_y |
source pixel y-coordination |
|
width |
width of the copied rectangle |
|
height |
height of the copied rectangle |
|
dst |
destination i-g-t buffer object |
|
dst_delta |
offset into the destination i-g-t bo |
|
dst_x |
destination pixel x-coordination |
|
dst_y |
destination pixel y-coordination |
void igt_blitter_fast_copy__raw (int fd,uint32_t src_handle,unsigned int src_delta,unsigned int src_stride,unsigned int src_tiling,unsigned int src_x,unsigned src_y,unsigned int width,unsigned int height,int bpp,uint32_t dst_handle,unsigned int dst_delta,unsigned int dst_stride,unsigned int dst_tiling,unsigned int dst_x,unsigned dst_y);
Like igt_blitter_fast_copy(), but talking to the kernel directly.
fd |
file descriptor of the i915 driver |
|
src_handle |
GEM handle of the source buffer |
|
src_delta |
offset into the source GEM bo, in bytes |
|
src_stride |
Stride (in bytes) of the source buffer |
|
src_tiling |
Tiling mode of the source buffer |
|
src_x |
X coordinate of the source region to copy |
|
src_y |
Y coordinate of the source region to copy |
|
width |
Width of the region to copy |
|
height |
Height of the region to copy |
|
bpp |
source and destination bits per pixel |
|
dst_handle |
GEM handle of the destination buffer |
|
dst_delta |
offset into the destination GEM bo, in bytes |
|
dst_stride |
Stride (in bytes) of the destination buffer |
|
dst_tiling |
Tiling mode of the destination buffer |
|
dst_x |
X coordinate of destination |
|
dst_y |
Y coordinate of destination |
void (*igt_render_copyfunc_t) (struct intel_batchbuffer *batch,drm_intel_context *context,const struct igt_buf *src,unsigned src_x,unsigned src_y,unsigned width,unsigned height,const struct igt_buf *dst,unsigned dst_x,unsigned dst_y);
This is the type of the per-platform render copy functions. The
platform-specific implementation can be obtained by calling
igt_get_render_copyfunc().
A render copy function will emit a batchbuffer to the kernel which executes
the specified blit copy operation using the render engine. context
is
optional and can be NULL.
batch |
batchbuffer object |
|
context |
libdrm hardware context to use |
|
src |
source i-g-t buffer object |
|
src_x |
source pixel x-coordination |
|
src_y |
source pixel y-coordination |
|
width |
width of the copied rectangle |
|
height |
height of the copied rectangle |
|
dst |
destination i-g-t buffer object |
|
dst_x |
destination pixel x-coordination |
|
dst_y |
destination pixel y-coordination |
void (*igt_fillfunc_t) (struct intel_batchbuffer *batch,const struct igt_buf *dst,unsigned x,unsigned y,unsigned width,unsigned height,uint8_t color);
This is the type of the per-platform fill functions using media
or gpgpu pipeline. The platform-specific implementation can be obtained
by calling igt_get_media_fillfunc() or igt_get_gpgpu_fillfunc().
A fill function will emit a batchbuffer to the kernel which executes the specified blit fill operation using the media/gpgpu engine.
void (*igt_vme_func_t) (struct intel_batchbuffer *batch,const struct igt_buf *src,unsigned int width,unsigned int height,const struct igt_buf *dst);
void (*igt_media_spinfunc_t) (struct intel_batchbuffer *batch,const struct igt_buf *dst,uint32_t spins);
This is the type of the per-platform media spin functions. The
platform-specific implementation can be obtained by calling
igt_get_media_spinfunc().
The media spin function emits a batchbuffer for the render engine with the media pipeline selected. The workload consists of a single thread which spins in a tight loop the requested number of times. Each spin increments a counter whose final 32-bit value is written to the destination buffer on completion. This utility provides a simple way to keep the render engine busy for a set time for various tests.
struct intel_batchbuffer {
drm_intel_bufmgr *bufmgr;
uint32_t devid;
int gen;
drm_intel_context *ctx;
drm_intel_bo *bo;
uint8_t buffer[BATCH_SZ];
uint8_t *ptr, *end;
};
struct igt_buf {
drm_intel_bo *bo;
uint32_t stride;
uint32_t tiling;
uint32_t bpp;
uint32_t *data;
uint32_t size;
struct {
uint32_t offset;
uint32_t stride;
} aux;
};
This is a i-g-t buffer object wrapper structure which augments the baseline libdrm buffer object with suitable data needed by the render copy and the fill functions.