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tests/gem_exec_parse: Test a command crossing a page boundary

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This is a speculative test in that it's not particularly relevant
today, but is important if we switch the parser implementation to
use kmap_atomic instead of vmap.

Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Brad Volkin 2014-01-29 13:58:30 -08:00 committed by Daniel Vetter
parent 56fee51b31
commit 6bf7307d8d
1 changed files with 68 additions and 0 deletions
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68
tests/gem_exec_parse.c
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@ -136,6 +136,60 @@ static int exec_batch(int fd, uint32_t cmd_bo, uint32_t *cmds,
return 1;
}
static int exec_split_batch(int fd, uint32_t *cmds,
int size, int ring, int expected_ret)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 objs[1];
uint32_t cmd_bo;
uint32_t noop[1024] = { 0 };
int ret;
// Allocate and fill a 2-page batch with noops
cmd_bo = gem_create(fd, 4096 * 2);
gem_write(fd, cmd_bo, 0, noop, sizeof(noop));
gem_write(fd, cmd_bo, 4096, noop, sizeof(noop));
// Write the provided commands such that the first dword
// of the command buffer is the last dword of the first
// page (i.e. the command is split across the two pages).
gem_write(fd, cmd_bo, 4096-sizeof(uint32_t), cmds, size);
objs[0].handle = cmd_bo;
objs[0].relocation_count = 0;
objs[0].relocs_ptr = 0;
objs[0].alignment = 0;
objs[0].offset = 0;
objs[0].flags = 0;
objs[0].rsvd1 = 0;
objs[0].rsvd2 = 0;
execbuf.buffers_ptr = (uintptr_t)objs;
execbuf.buffer_count = 1;
execbuf.batch_start_offset = 0;
execbuf.batch_len = size;
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;
ret = drmIoctl(fd,
DRM_IOCTL_I915_GEM_EXECBUFFER2,
&execbuf);
if (ret == 0)
igt_assert(expected_ret == 0);
else
igt_assert(-errno == expected_ret);
gem_sync(fd, cmd_bo);
gem_close(fd, cmd_bo);
return 1;
}
uint32_t handle;
int fd;
@ -266,6 +320,20 @@ igt_main
-EINVAL));
}
igt_subtest("cmd-crossing-page") {
uint32_t lri_ok[] = {
MI_LOAD_REGISTER_IMM,
0x5280, // allowed register address (SO_WRITE_OFFSET[0])
0x1,
MI_BATCH_BUFFER_END,
};
igt_assert(
exec_split_batch(fd,
lri_ok, sizeof(lri_ok),
I915_EXEC_RENDER,
0));
}
igt_fixture {
gem_close(fd, handle);