--- /dev/null
+/*
+ * Copyright © 2012 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:
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+/*
+ * Testcase: Test the relocations through the CPU domain
+ *
+ * Attempt to stress test performing relocations whilst the batch is in the
+ * CPU domain.
+ *
+ * A freshly allocated buffer starts in the CPU domain, and the pwrite
+ * should also be performed whilst in the CPU domain and so we should
+ * execute the relocations within the CPU domain. If for any reason one of
+ * those steps should land it in the GTT domain, we take the secondary
+ * precaution of filling the mappable portion of the GATT.
+ *
+ * In order to detect whether a relocation fails, we first fill a target
+ * buffer with a sequence of invalid commands that would cause the GPU to
+ * immediate hang, and then attempt to overwrite them with a legal, if
+ * short, batchbuffer using a BLT. Then we come to execute the bo, if the
+ * relocation fail and we either copy across all zeros or garbage, then the
+ * GPU will hang.
+ */
+
+#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 void copy(int fd, uint32_t batch, uint32_t src, uint32_t dst)
+{
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct drm_i915_gem_relocation_entry gem_reloc[2];
+ struct drm_i915_gem_exec_object2 gem_exec[3];
+
+ gem_reloc[0].offset = 4 * sizeof(uint32_t);
+ gem_reloc[0].delta = 0;
+ gem_reloc[0].target_handle = dst;
+ gem_reloc[0].read_domains = I915_GEM_DOMAIN_RENDER;
+ gem_reloc[0].write_domain = I915_GEM_DOMAIN_RENDER;
+ gem_reloc[0].presumed_offset = 0;
+
+ gem_reloc[1].offset = 7 * sizeof(uint32_t);
+ gem_reloc[1].delta = 0;
+ gem_reloc[1].target_handle = src;
+ gem_reloc[1].read_domains = I915_GEM_DOMAIN_RENDER;
+ gem_reloc[1].write_domain = 0;
+ gem_reloc[1].presumed_offset = 0;
+
+ memset(gem_exec, 0, sizeof(gem_exec));
+ gem_exec[0].handle = src;
+ gem_exec[1].handle = dst;
+ gem_exec[2].handle = batch;
+ gem_exec[2].relocation_count = 2;
+ gem_exec[2].relocs_ptr = (uintptr_t)gem_reloc;
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)gem_exec;
+ execbuf.buffer_count = 3;
+ execbuf.batch_len = 4096;
+
+ do_or_die(drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf));
+}
+
+static void exec(int fd, uint32_t handle)
+{
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct drm_i915_gem_exec_object2 gem_exec;
+
+ memset(&gem_exec, 0, sizeof(gem_exec));
+ gem_exec.handle = handle;
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)&gem_exec;
+ execbuf.buffer_count = 1;
+ execbuf.batch_len = 4096;
+
+ do_or_die(drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf));
+}
+
+int main(int argc, char **argv)
+{
+ const uint32_t batch[] = {
+ (XY_SRC_COPY_BLT_CMD |
+ XY_SRC_COPY_BLT_WRITE_ALPHA |
+ XY_SRC_COPY_BLT_WRITE_RGB),
+ (3 << 24 | /* 32 bits */
+ 0xcc << 16 | /* copy ROP */
+ 4096),
+ 0 << 16 | 0, /* dst x1, y1 */
+ 1 << 16 | 2,
+ 0, /* dst relocation */
+ 0 << 16 | 0, /* src x1, y1 */
+ 4096,
+ 0, /* src relocation */
+ MI_BATCH_BUFFER_END,
+ };
+ const uint32_t hang[] = {-1, -1, -1, -1};
+ const uint32_t end[] = {MI_BATCH_BUFFER_END, 0};
+ uint64_t aper_size;
+ uint32_t noop;
+ int fd, i, count;
+
+ fd = drm_open_any();
+ aper_size = gem_aperture_size(fd);
+ count = aper_size / 4096 * 2;
+
+ noop = gem_create(fd, 4096);
+ gem_write(fd, noop, 0, end, sizeof(end));
+
+ /* fill the entire gart with batches and run them */
+ for (i = 0; i < count; i++) {
+ uint32_t handle, bad;
+
+ handle = gem_create(fd, 4096);
+ gem_write(fd, handle, 0, batch, sizeof(batch));
+
+ bad = gem_create(fd, 4096);
+ gem_write(fd, bad, 0, hang, sizeof(hang));
+
+ /* launch the newly created batch */
+ copy(fd, handle, noop, bad);
+ exec(fd, bad);
+ gem_close(fd, bad);
+
+ drmtest_progress("gem_cpu_reloc: ", i, count);
+ }
+
+ fprintf(stderr, "Test suceeded, cleanup up - this might take a while.\n");
+ close(fd);
+
+ return 0;
+}
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