1 files changed, 263 insertions, 0 deletions
diff --git a/tests/i915/gem_exec_big.c b/tests/i915/gem_exec_big.c
new file mode 100644
index 00000000..a15672f6
--- /dev/null
+++ b/tests/i915/gem_exec_big.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright © 2011,2012 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>
+ *    Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ */
+
+/*
+ * Testcase: run a nop batch which is really big
+ *
+ * Mostly useful to stress-test the error-capture code
+ */
+
+#include "igt.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include "drm.h"
+
+IGT_TEST_DESCRIPTION("Run a large nop batch to stress test the error capture"
+		     " code.");
+
+#define FORCE_PREAD_PWRITE 0
+
+static int use_64bit_relocs;
+
+static void exec1(int fd, uint32_t handle, uint64_t reloc_ofs, unsigned flags, char *ptr)
+{
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 gem_exec[1];
+	struct drm_i915_gem_relocation_entry gem_reloc[1];
+
+	gem_reloc[0].offset = reloc_ofs;
+	gem_reloc[0].delta = 0;
+	gem_reloc[0].target_handle = handle;
+	gem_reloc[0].read_domains = I915_GEM_DOMAIN_RENDER;
+	gem_reloc[0].write_domain = 0;
+	gem_reloc[0].presumed_offset = 0;
+
+	gem_exec[0].handle = handle;
+	gem_exec[0].relocation_count = 1;
+	gem_exec[0].relocs_ptr = to_user_pointer(gem_reloc);
+	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 = to_user_pointer(gem_exec);
+	execbuf.buffer_count = 1;
+	execbuf.batch_start_offset = 0;
+	execbuf.batch_len = 8;
+	execbuf.cliprects_ptr = 0;
+	execbuf.num_cliprects = 0;
+	execbuf.DR1 = 0;
+	execbuf.DR4 = 0;
+	execbuf.flags = flags;
+	i915_execbuffer2_set_context_id(execbuf, 0);
+	execbuf.rsvd2 = 0;
+
+	/* Avoid hitting slowpaths in the reloc processing which might yield a
+	 * presumed_offset of -1. Happens when the batch is still busy from the
+	 * last round. */
+	gem_sync(fd, handle);
+
+	gem_execbuf(fd, &execbuf);
+
+	igt_warn_on(gem_reloc[0].presumed_offset == -1);
+
+	if (use_64bit_relocs) {
+		uint64_t tmp;
+		if (ptr)
+			tmp = *(uint64_t *)(ptr+reloc_ofs);
+		else
+			gem_read(fd, handle, reloc_ofs, &tmp, sizeof(tmp));
+		igt_assert_eq(tmp, gem_reloc[0].presumed_offset);
+	} else {
+		uint32_t tmp;
+		if (ptr)
+			tmp = *(uint32_t *)(ptr+reloc_ofs);
+		else
+			gem_read(fd, handle, reloc_ofs, &tmp, sizeof(tmp));
+		igt_assert_eq(tmp, gem_reloc[0].presumed_offset);
+	}
+}
+
+static void xchg_reloc(void *array, unsigned i, unsigned j)
+{
+	struct drm_i915_gem_relocation_entry *reloc = array;
+	struct drm_i915_gem_relocation_entry *a = &reloc[i];
+	struct drm_i915_gem_relocation_entry *b = &reloc[j];
+	struct drm_i915_gem_relocation_entry tmp;
+
+	tmp = *a;
+	*a = *b;
+	*b = tmp;
+}
+
+static void execN(int fd, uint32_t handle, uint64_t batch_size, unsigned flags, char *ptr)
+{
+#define reloc_ofs(N, T) ((((N)+1) << 12) - 4*(1 + ((N) == ((T)-1))))
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 gem_exec[1];
+	struct drm_i915_gem_relocation_entry *gem_reloc;
+	uint64_t n, nreloc = batch_size >> 12;
+
+	gem_reloc = calloc(nreloc, sizeof(*gem_reloc));
+	igt_assert(gem_reloc);
+
+	for (n = 0; n < nreloc; n++) {
+		gem_reloc[n].offset = reloc_ofs(n, nreloc);
+		gem_reloc[n].target_handle = handle;
+		gem_reloc[n].read_domains = I915_GEM_DOMAIN_RENDER;
+		gem_reloc[n].presumed_offset = n ^ 0xbeefdeaddeadbeef;
+		if (ptr) {
+			if (use_64bit_relocs)
+				*(uint64_t *)(ptr + gem_reloc[n].offset) = gem_reloc[n].presumed_offset;
+			else
+				*(uint32_t *)(ptr + gem_reloc[n].offset) = gem_reloc[n].presumed_offset;
+		} else
+			gem_write(fd, handle, gem_reloc[n].offset, &gem_reloc[n].presumed_offset, 4*(1+use_64bit_relocs));
+	}
+
+	memset(gem_exec, 0, sizeof(gem_exec));
+	gem_exec[0].handle = handle;
+	gem_exec[0].relocation_count = nreloc;
+	gem_exec[0].relocs_ptr = to_user_pointer(gem_reloc);
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = to_user_pointer(gem_exec);
+	execbuf.buffer_count = 1;
+	execbuf.batch_start_offset = 0;
+	execbuf.batch_len = 8;
+	execbuf.flags = flags;
+
+	/* Avoid hitting slowpaths in the reloc processing which might yield a
+	 * presumed_offset of -1. Happens when the batch is still busy from the
+	 * last round. */
+	gem_sync(fd, handle);
+
+	igt_permute_array(gem_reloc, nreloc, xchg_reloc);
+
+	gem_execbuf(fd, &execbuf);
+	for (n = 0; n < nreloc; n++)
+		igt_warn_on(gem_reloc[n].presumed_offset == -1);
+
+	if (use_64bit_relocs) {
+		for (n = 0; n < nreloc; n++) {
+			uint64_t tmp;
+			if (ptr)
+				tmp = *(uint64_t *)(ptr+reloc_ofs(n, nreloc));
+			else
+				gem_read(fd, handle, reloc_ofs(n, nreloc), &tmp, sizeof(tmp));
+			igt_assert_eq(tmp, gem_reloc[n].presumed_offset);
+		}
+	} else {
+		for (n = 0; n < nreloc; n++) {
+			uint32_t tmp;
+			if (ptr)
+				tmp = *(uint32_t *)(ptr+reloc_ofs(n, nreloc));
+			else
+				gem_read(fd, handle, reloc_ofs(n, nreloc), &tmp, sizeof(tmp));
+			igt_assert_eq(tmp, gem_reloc[n].presumed_offset);
+		}
+	}
+
+	free(gem_reloc);
+#undef reloc_ofs
+}
+
+igt_simple_main
+{
+	uint32_t batch[2] = {MI_BATCH_BUFFER_END};
+	uint64_t batch_size, max, ggtt_max, reloc_ofs;
+	int fd;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	igt_require_gem(fd);
+
+	use_64bit_relocs = intel_gen(intel_get_drm_devid(fd)) >= 8;
+
+	max = 3 * gem_aperture_size(fd) / 4;
+	ggtt_max = 3 * gem_global_aperture_size(fd) / 4;
+	intel_require_memory(1, max, CHECK_RAM);
+
+	for (batch_size = 4096; batch_size <= max; ) {
+		uint32_t handle;
+		void *ptr;
+
+		handle = gem_create(fd, batch_size);
+		gem_write(fd, handle, 0, batch, sizeof(batch));
+
+		if (!FORCE_PREAD_PWRITE && gem_has_llc(fd))
+			ptr = __gem_mmap__cpu(fd, handle, 0, batch_size, PROT_READ);
+		else if (!FORCE_PREAD_PWRITE && gem_mmap__has_wc(fd))
+			ptr = __gem_mmap__wc(fd, handle, 0, batch_size, PROT_READ);
+		else
+			ptr = NULL;
+
+		igt_debug("Forwards (%lld)\n", (long long)batch_size);
+		for (reloc_ofs = 4096; reloc_ofs < batch_size; reloc_ofs += 4096) {
+			igt_debug("batch_size %llu, reloc_ofs %llu\n",
+				  (long long)batch_size, (long long)reloc_ofs);
+			exec1(fd, handle, reloc_ofs, 0, ptr);
+			if (batch_size < ggtt_max)
+				exec1(fd, handle, reloc_ofs, I915_EXEC_SECURE, ptr);
+		}
+
+		igt_debug("Backwards (%lld)\n", (long long)batch_size);
+		for (reloc_ofs = batch_size - 4096; reloc_ofs; reloc_ofs -= 4096) {
+			igt_debug("batch_size %llu, reloc_ofs %llu\n",
+				  (long long)batch_size, (long long)reloc_ofs);
+			exec1(fd, handle, reloc_ofs, 0, ptr);
+			if (batch_size < ggtt_max)
+				exec1(fd, handle, reloc_ofs, I915_EXEC_SECURE, ptr);
+		}
+
+		igt_debug("Random (%lld)\n", (long long)batch_size);
+		execN(fd, handle, batch_size, 0, ptr);
+		if (batch_size < ggtt_max)
+			execN(fd, handle, batch_size, I915_EXEC_SECURE, ptr);
+
+		if (ptr)
+			munmap(ptr, batch_size);
+		gem_madvise(fd, handle, I915_MADV_DONTNEED);
+
+		if (batch_size < max && 2*batch_size > max)
+			batch_size = max;
+		else
+			batch_size *= 2;
+	}
+
+	close(fd);
+}