static void exec0(int fd)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 exec[1];
uint32_t buf[2] = { MI_BATCH_BUFFER_END, 0 };
/* Just try executing with a zero-length bo.
* We expect the kernel to either accept the nop batch, or reject it
* for the zero-length buffer, but never crash.
*/
exec[0].handle = gem_create(fd, 4096);
gem_write(fd, exec[0].handle, 0, buf, sizeof(buf));
exec[0].relocation_count = 0;
exec[0].relocs_ptr = 0;
exec[0].alignment = 0;
exec[0].offset = 0;
exec[0].flags = 0;
exec[0].rsvd1 = 0;
exec[0].rsvd2 = 0;
execbuf.buffers_ptr = (uintptr_t)exec;
execbuf.buffer_count = 1;
execbuf.batch_start_offset = 0;
execbuf.batch_len = sizeof(buf);
execbuf.cliprects_ptr = 0;
execbuf.num_cliprects = 0;
execbuf.DR1 = 0;
execbuf.DR4 = 0;
execbuf.flags = 0;
i915_execbuffer2_set_context_id(execbuf, 0);
execbuf.rsvd2 = 0;
igt_info("trying to run an empty batchbuffer\n");
gem_exec(fd, &execbuf);
gem_close(fd, exec[0].handle);
}
static void run(int object_size)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 exec[3];
struct drm_i915_gem_relocation_entry reloc[4];
uint32_t buf[20];
uint32_t handle, src, dst;
int fd, len, count;
int ring;
fd = drm_open_any();
handle = gem_create(fd, 4096);
src = gem_create(fd, object_size);
dst = gem_create(fd, object_size);
len = gem_linear_blt(buf, src, dst, object_size, reloc);
gem_write(fd, handle, 0, buf, len);
exec[0].handle = src;
exec[0].relocation_count = 0;
exec[0].relocs_ptr = 0;
exec[0].alignment = 0;
exec[0].offset = 0;
exec[0].flags = 0;
exec[0].rsvd1 = 0;
exec[0].rsvd2 = 0;
exec[1].handle = dst;
exec[1].relocation_count = 0;
exec[1].relocs_ptr = 0;
exec[1].alignment = 0;
exec[1].offset = 0;
exec[1].flags = 0;
exec[1].rsvd1 = 0;
exec[1].rsvd2 = 0;
exec[2].handle = handle;
exec[2].relocation_count = len > 40 ? 4 : 2;
exec[2].relocs_ptr = (uintptr_t)reloc;
exec[2].alignment = 0;
exec[2].offset = 0;
exec[2].flags = 0;
exec[2].rsvd1 = 0;
exec[2].rsvd2 = 0;
ring = 0;
if (HAS_BLT_RING(intel_get_drm_devid(fd)))
ring = I915_EXEC_BLT;
execbuf.buffers_ptr = (uintptr_t)exec;
execbuf.buffer_count = 3;
execbuf.batch_start_offset = 0;
execbuf.batch_len = len;
execbuf.cliprects_ptr = 0;
execbuf.num_cliprects = 0;
execbuf.DR1 = 0;
execbuf.DR4 = 0;
execbuf.flags = ring;
i915_execbuffer2_set_context_id(execbuf, 0);
execbuf.rsvd2 = 0;
for (count = 1; count <= 1<<17; count <<= 1) {
struct timeval start, end;
gettimeofday(&start, NULL);
if (gem_exec(fd, &execbuf, count))
exit(1);
gem_sync(fd, handle);
gettimeofday(&end, NULL);
printf("Time to blt %d bytes x %6d: %7.3fµs, %s\n",
object_size, count,
elapsed(&start, &end, count),
bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
fflush(stdout);
}
gem_close(fd, handle);
close(fd);
}