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igt/gem_concurrent_blit: Switch to a shared mmap for userptr

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If we use a MAP_SHARED mmaping for the our backing storage for userptr,
then it will be inherited across the fork with the same address. ideal
for continuity testing of children.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-01-23 09:07:12 +00:00
parent 69ecedea73
commit d4a05bc009
1 changed files with 8 additions and 5 deletions
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11
tests/gem_concurrent_all.c
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@ -254,12 +254,16 @@ userptr_create_bo(drm_intel_bufmgr *bufmgr, int width, int height)
{
struct local_i915_gem_userptr userptr;
drm_intel_bo *bo;
void *ptr;
memset(&userptr, 0, sizeof(userptr));
userptr.user_size = width * height * 4;
userptr.user_size = (userptr.user_size + 4095) & -4096;
igt_assert(posix_memalign((void **)&userptr.user_ptr,
4096, userptr.user_size) == 0);
ptr = mmap(NULL, userptr.user_size,
PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0);
igt_assert(ptr != (void *)-1);
userptr.user_ptr = (uintptr_t)ptr;
do_or_die(drmIoctl(fd, LOCAL_IOCTL_I915_GEM_USERPTR, &userptr));
bo = gem_handle_to_libdrm_bo(bufmgr, fd, "userptr", userptr.handle);
@ -295,7 +299,7 @@ userptr_cmp_bo(drm_intel_bo *bo, uint32_t val, int width, int height, drm_intel_
static void
userptr_release_bo(drm_intel_bo *bo)
{
free(bo->virtual);
munmap(bo->virtual, bo->size);
bo->virtual = NULL;
drm_intel_bo_unreference(bo);
@ -1447,7 +1451,6 @@ run_modes(const char *style, const struct access_mode *mode, unsigned allow_mem)
return;
run_basic_modes(style, mode, "", run_single);
if (mode->create_bo != userptr_create_bo)
run_basic_modes(style, mode, "-child", run_child);
run_basic_modes(style, mode, "-forked", run_forked);