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igt/gem_mmap_gtt: Check GTT mmapping of large tiled objects

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Move function CPU mmap test of large bo to gem_mmap, and include a
page-by-page copy between two huge objects (as we have had many bugs
triggering pagefault-of-doom for full apertures before).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2015-05-08 11:43:50 +01:00
parent cf9f48e704
commit be955173d0
2 changed files with 226 additions and 85 deletions
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tests/gem_mmap.c
+64
View File
@@ -36,12 +36,69 @@
#include <sys/ioctl.h>
#include "drm.h"
#include "ioctl_wrappers.h"
#include "igt_aux.h"
#include "drmtest.h"
#define OBJECT_SIZE 16384
#define PAGE_SIZE 4096
int fd;
int handle;
static void
test_huge_bo(int huge, int tiling)
{
uint64_t huge_object_size, last_offset;
char *ptr_cpu;
char *cpu_pattern;
uint32_t bo;
int i;
switch (huge) {
case -1:
huge_object_size = gem_mappable_aperture_size() / 2;
break;
case 0:
huge_object_size = gem_mappable_aperture_size() + PAGE_SIZE;
break;
default:
huge_object_size = gem_aperture_size(fd) + PAGE_SIZE;
break;
}
intel_require_memory(1, huge_object_size, CHECK_RAM);
last_offset = huge_object_size - PAGE_SIZE;
cpu_pattern = malloc(PAGE_SIZE);
igt_assert(cpu_pattern);
for (i = 0; i < PAGE_SIZE; i++)
cpu_pattern[i] = i;
bo = gem_create(fd, huge_object_size);
/* Obtain CPU mapping for the object. */
ptr_cpu = gem_mmap__cpu(fd, bo, 0, huge_object_size,
PROT_READ | PROT_WRITE);
igt_assert(ptr_cpu);
gem_set_domain(fd, handle, I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);
gem_close(fd, bo);
/* Write first page through the mapping and assert reading it back
* works. */
memcpy(ptr_cpu, cpu_pattern, PAGE_SIZE);
igt_assert(memcmp(ptr_cpu, cpu_pattern, PAGE_SIZE) == 0);
/* Write last page through the mapping and assert reading it back
* works. */
memcpy(ptr_cpu + last_offset, cpu_pattern, PAGE_SIZE);
igt_assert(memcmp(ptr_cpu + last_offset, cpu_pattern, PAGE_SIZE) == 0);
/* Cross check that accessing two simultaneous pages works. */
igt_assert(memcmp(ptr_cpu, ptr_cpu + last_offset, PAGE_SIZE) == 0);
munmap(ptr_cpu, huge_object_size);
free(cpu_pattern);
}
igt_main
{
struct drm_i915_gem_mmap arg;
@@ -99,6 +156,13 @@ igt_main
gem_close(fd, handle);
}
igt_subtest("small-bo")
test_huge_bo(fd, -1);
igt_subtest("big-bo")
test_huge_bo(fd, 0);
igt_subtest("huge-bo")
test_huge_bo(fd, 1);
igt_fixture
close(fd);
}