On Tue, 2014-04-15 at 10:38 +0800, Zhao Yakui wrote:
> The Broadwell GT3 machine has two independent BSD rings in kernel driver while
> it is transparent to the user-space driver. In such case it needs to check
> the CPU<->GPU sync for the second BSD ring.
>
> V1->V2: Follow Daniel's comment to add one subtext instead of one individual
> test case, which is used to test the CPU<->GPU sync under multi BSD rings
>
> Signed-off-by: Zhao Yakui <yakui.zhao@xxxxxxxxx>
> ---
> tests/gem_dummy_reloc_loop.c | 102 +++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 101 insertions(+), 1 deletion(-)
>
> diff --git a/tests/gem_dummy_reloc_loop.c b/tests/gem_dummy_reloc_loop.c
> index a61b59b..660d8e1 100644
> --- a/tests/gem_dummy_reloc_loop.c
> +++ b/tests/gem_dummy_reloc_loop.c
> @@ -48,6 +48,13 @@ static drm_intel_bufmgr *bufmgr;
> struct intel_batchbuffer *batch;
> static drm_intel_bo *target_buffer;
>
> +#define NUM_FD 50
> +
> +static int mfd[NUM_FD];
> +static drm_intel_bufmgr *mbufmgr[NUM_FD];
> +static struct intel_batchbuffer *mbatch[NUM_FD];
> +static drm_intel_bo *mbuffer[NUM_FD];
> +
> /*
> * Testcase: Basic check of ring<->cpu sync using a dummy reloc
> *
> @@ -124,6 +131,50 @@ dummy_reloc_loop_random_ring(int num_rings)
> }
> }
>
> +static void
> +dummy_reloc_loop_random_ring_multi_fd(int num_rings)
> +{
> + int i;
> + struct intel_batchbuffer *saved_batch;
> +
> + saved_batch = batch;
> +
> + srandom(0xdeadbeef);
> +
> + for (i = 0; i < 0x100000; i++) {
> + int mindex;
> + int ring = random() % num_rings + 1;
> +
> + mindex = random() % NUM_FD;
> + batch = mbatch[mindex];
> +
> + if (ring == I915_EXEC_RENDER) {
> + BEGIN_BATCH(4);
> + OUT_BATCH(MI_COND_BATCH_BUFFER_END | MI_DO_COMPARE);
> + OUT_BATCH(0xffffffff); /* compare dword */
> + OUT_RELOC(mbuffer[mindex], I915_GEM_DOMAIN_RENDER,
> + I915_GEM_DOMAIN_RENDER, 0);
> + OUT_BATCH(MI_NOOP);
> + ADVANCE_BATCH();
> + } else {
> + BEGIN_BATCH(4);
> + OUT_BATCH(MI_FLUSH_DW | 1);
> + OUT_BATCH(0); /* reserved */
> + OUT_RELOC(mbuffer[mindex], I915_GEM_DOMAIN_RENDER,
> + I915_GEM_DOMAIN_RENDER, 0);
> + OUT_BATCH(MI_NOOP | (1<<22) | (0xf));
> + ADVANCE_BATCH();
> + }
> + intel_batchbuffer_flush_on_ring(batch, ring);
> +
> + drm_intel_bo_map(target_buffer, 0);
> + // map to force waiting on rendering
> + drm_intel_bo_unmap(target_buffer);
> + }
> +
> + batch = saved_batch;
> +}
> +
> int fd;
> int devid;
> int num_rings;
> @@ -133,6 +184,7 @@ igt_main
> igt_skip_on_simulation();
>
> igt_fixture {
> + int i;
> fd = drm_open_any();
> devid = intel_get_drm_devid(fd);
> num_rings = gem_get_num_rings(fd);
> @@ -148,6 +200,35 @@ igt_main
>
> target_buffer = drm_intel_bo_alloc(bufmgr, "target bo", 4096, 4096);
> igt_assert(target_buffer);
> +
> + /* Create multi drm_fd and map one gem object to multi gem_contexts */
> + {
> + unsigned int target_flink;
> + char buffer_name[32];
> + if (dri_bo_flink(target_buffer, &target_flink)) {
> + printf("fail to get flink for target buffer\n");
> + igt_assert(0);
For the future: could be just igt_assert_f().
> + }
> + for (i = 0; i < NUM_FD; i++) {
> + mfd[i] = 0;
> + mbufmgr[i] = NULL;
> + mbuffer[i] = NULL;
> + }
Nitpick: the above are all statics, so no need to init them.
Other than the above this looks good:
Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
> + for (i = 0; i < NUM_FD; i++) {
> + sprintf(buffer_name, "Target buffer %d\n", i);
> + mfd[i] = drm_open_any();
> + mbufmgr[i] = drm_intel_bufmgr_gem_init(mfd[i], 4096);
> + igt_assert(mbufmgr[i]);
> + drm_intel_bufmgr_gem_enable_reuse(mbufmgr[i]);
> + mbatch[i] = intel_batchbuffer_alloc(mbufmgr[i], devid);
> + igt_assert(mbufmgr[i]);
> + mbuffer[i] = intel_bo_gem_create_from_name(
> + mbufmgr[i],
> + buffer_name,
> + target_flink);
> + igt_assert(mbuffer[i]);
> + }
> + }
> }
>
> igt_subtest("render") {
> @@ -190,8 +271,27 @@ igt_main
> printf("dummy loop run on random rings completed\n");
> }
> }
> -
> + igt_subtest("mixed_multi_fd") {
> + if (num_rings > 1) {
> + sleep(2);
> + printf("running dummy loop on random rings based on "
> + "multi drm_fd\n");
> + dummy_reloc_loop_random_ring_multi_fd(num_rings);
> + printf("dummy loop run on random rings based on "
> + "multi drm_fd completed\n");
> + }
> + }
> igt_fixture {
> + int i;
> + /* Free the buffer/batchbuffer/buffer mgr for multi-fd */
> + {
> + for (i = 0; i < NUM_FD; i++) {
> + dri_bo_unreference(mbuffer[i]);
> + intel_batchbuffer_free(mbatch[i]);
> + drm_intel_bufmgr_destroy(mbufmgr[i]);
> + close(mfd[i]);
> + }
> + }
> drm_intel_bo_unreference(target_buffer);
> intel_batchbuffer_free(batch);
> drm_intel_bufmgr_destroy(bufmgr);
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