tests: add gem_cs_prefetch

Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/tests/Makefile.am b/tests/Makefile.am
index b250d37..a1573b7 100644 (file)
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -33,6 +33,7 @@ TESTS_progs = \
        gem_fence_thrash \
        gem_fenced_exec_thrash \
        gem_gtt_speed \
+       gem_cs_prefetch \
        gen3_render_linear_blits \
        gen3_render_tiledx_blits \
        gen3_render_tiledy_blits \

diff --git a/tests/gem_cs_prefetch.c b/tests/gem_cs_prefetch.c
new file mode 100644 (file)
index 0000000..d425ae9
--- /dev/null
+++ b/tests/gem_cs_prefetch.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ */
+
+/*
+ * Testcase: Test the CS prefetch behaviour on batches
+ *
+ * Historically the batch prefetcher doesn't check whether it's crossing page
+ * boundaries and likes to throw up when it gets a pagefault in return for his
+ * over-eager behaviour. Check for this.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_gpu_tools.h"
+
+static drm_intel_bufmgr *bufmgr;
+struct intel_batchbuffer *batch;
+
+static void exec(int fd, uint32_t handle)
+{
+       struct drm_i915_gem_execbuffer2 execbuf;
+       struct drm_i915_gem_exec_object2 gem_exec[1];
+       int ret = 0;
+
+       gem_exec[0].handle = handle;
+       gem_exec[0].relocation_count = 0;
+       gem_exec[0].relocs_ptr = 0;
+       gem_exec[0].alignment = 0;
+       gem_exec[0].offset = 0;
+       gem_exec[0].flags = 0;
+       gem_exec[0].rsvd1 = 0;
+       gem_exec[0].rsvd2 = 0;
+
+       execbuf.buffers_ptr = (uintptr_t)gem_exec;
+       execbuf.buffer_count = 1;
+       execbuf.batch_start_offset = 0;
+       execbuf.batch_len = 4096;
+       execbuf.cliprects_ptr = 0;
+       execbuf.num_cliprects = 0;
+       execbuf.DR1 = 0;
+       execbuf.DR4 = 0;
+       execbuf.flags = 0;
+       execbuf.rsvd1 = 0;
+       execbuf.rsvd2 = 0;
+
+       ret = drmIoctl(fd,
+                      DRM_IOCTL_I915_GEM_EXECBUFFER2,
+                      &execbuf);
+       gem_sync(fd, handle);
+       assert(ret == 0);
+}
+
+int main(int argc, char **argv)
+{
+       uint32_t batch_end[2] = {MI_BATCH_BUFFER_END};
+       int fd, i, ret;
+       uint64_t aper_size;
+       int count;
+       drm_intel_bo *sample_batch_bo;
+
+       fd = drm_open_any();
+
+       bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+       if (!bufmgr) {
+               fprintf(stderr, "failed to init libdrm\n");
+               exit(-1);
+       }
+
+       drm_intel_bufmgr_gem_enable_reuse(bufmgr);
+       
+       aper_size = gem_aperture_size(fd);
+
+       /* presume a big per-bo overhead */
+       if (intel_get_total_ram_mb() < (aper_size / (1024*1024)) * 3 / 2) {
+               fprintf(stderr, "not enough mem to run test\n");
+               return 77;
+       }
+
+       count = aper_size / 4096;
+
+       batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
+       assert(batch);
+
+       sample_batch_bo = drm_intel_bo_alloc(bufmgr, "", 4096, 4096);
+       assert(sample_batch_bo);
+       ret = drm_intel_bo_subdata(sample_batch_bo, 4096-sizeof(batch_end),
+                                  sizeof(batch_end), batch_end);
+       assert(ret == 0);
+
+       /* fill the entire gart with batches and run them */
+       for (i = 0; i < count; i++) {
+               drm_intel_bo *batch_bo;
+
+               batch_bo = drm_intel_bo_alloc(bufmgr, "", 4096, 4096);
+               assert(batch_bo);
+
+               /* copy the sample batch with the gpu to the new one, so that we
+                * also test the unmappable part of the gtt. */
+               BEGIN_BATCH(8);
+               OUT_BATCH(XY_SRC_COPY_BLT_CMD |
+                         XY_SRC_COPY_BLT_WRITE_ALPHA |
+                         XY_SRC_COPY_BLT_WRITE_RGB);
+               OUT_BATCH((3 << 24) | /* 32 bits */
+                         (0xcc << 16) | /* copy ROP */
+                         4096);
+               OUT_BATCH(0); /* dst y1,x1 */
+               OUT_BATCH((1 << 16) | 1024);
+               OUT_RELOC(batch_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
+               OUT_BATCH((0 << 16) | 0); /* src x1, y1 */
+               OUT_BATCH(4096);
+               OUT_RELOC(sample_batch_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
+               ADVANCE_BATCH();
+
+               intel_batchbuffer_flush(batch);
+               if (i % 100 == 0)
+                       gem_sync(fd, batch_bo->handle);
+
+               drm_intel_bo_disable_reuse(batch_bo);
+
+               /* launch the newly created batch */
+               exec(fd, batch_bo->handle);
+
+               // leak buffers
+               //drm_intel_bo_unreference(batch_bo);
+       }
+
+       drm_intel_bufmgr_destroy(bufmgr);
+
+       close(fd);
+
+       return 0;
+}