First disable prefault, then map src bo to gtt space, so when write src bo
to dst bo, it will run into pwrite_slow path. Finally enable prefault
Signed-off-by: Xiong Zhang <xiong.y.zh...@intel.com>
---
tests/gem_disable_prefault.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/tests/gem_disable_prefault.c b/tests/gem_disable_prefault.c
index 9e6f0ad..b6b2d59 100644
--- a/tests/gem_disable_prefault.c
+++ b/tests/gem_disable_prefault.c
@@ -43,6 +43,7 @@
#include "intel_gpu_tools.h"
#define OBJECT_SIZE (16*1024*1024)
+#define TEST_VALUE 0x5a
static void *
mmap_bo(int fd, uint32_t handle, int size)
@@ -144,6 +145,45 @@ test_disable_prefault_reloc(int fd)
gem_close(fd, handle);
}
+static void
+test_disable_prefault_write(int fd)
+{
+ uint32_t src, dst;
+ void *ptr;
+ int i;
+ uint8_t *tmp;
+
+ src = gem_create(fd, OBJECT_SIZE);
+ dst = gem_create(fd, OBJECT_SIZE);
+
+ /* write test_val to src object */
+ ptr = gem_mmap__cpu(fd, src, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+ assert(ptr != NULL);
+ tmp = (uint8_t *)ptr;
+ memset(tmp, TEST_VALUE, OBJECT_SIZE);
+
+ drmtest_disable_prefault();
+ ptr = mmap_bo(fd, src, OBJECT_SIZE);
+ gem_write(fd, dst, 0, ptr, OBJECT_SIZE);
+ munmap(ptr, OBJECT_SIZE);
+ drmtest_enable_prefault();
+
+ /* compare dst object to test_val */
+ ptr = gem_mmap__cpu(fd, dst, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+ assert(ptr != NULL);
+ tmp = (uint8_t *)ptr;
+ for (i = 0; i < OBJECT_SIZE; i++) {
+ if (tmp[i] != TEST_VALUE) {
+ printf("mismatch at %i, got: %i\n",
+ i, tmp[i]);
+ break;
+ }
+ }
+
+ gem_close(fd, dst);
+ gem_close(fd, src);
+}
+
int main(int argc, char **argv)
{
int fd;
@@ -161,6 +201,9 @@ int main(int argc, char **argv)
if (drmtest_run_subtest("reloc"))
test_disable_prefault_reloc(fd);
+ if (drmtest_run_subtest("write"))
+ test_disable_prefault_write(fd);
+
close(fd);
return 0;
--
1.8.3.2
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