tests: add gem_persisten_relocs

This reproduces the 3.7 relocation regression ...

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 385 insertions, 0 deletions

diff --git a/tests/gem_persistent_relocs.c b/tests/gem_persistent_relocs.c
new file mode 100644
index 00000000..50338747
--- /dev/null
+++ b/tests/gem_persistent_relocs.c
@@ -0,0 +1,385 @@
+/*
+ * Copyright © 2013 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>
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_gpu_tools.h"
+
+/*
+ * Testcase: Persistent relocations as used by uxa/libva
+ *
+ */
+
+static drm_intel_bufmgr *bufmgr;
+struct intel_batchbuffer *batch;
+
+uint32_t blob[2048*2048];
+#define NUM_TARGET_BOS 16
+drm_intel_bo *pc_target_bo[NUM_TARGET_BOS];
+drm_intel_bo *dummy_bo;
+drm_intel_bo *special_bos[NUM_TARGET_BOS];
+uint32_t relocs_bo_handle[NUM_TARGET_BOS];
+void *gtt_relocs_ptr[NUM_TARGET_BOS];
+uint32_t devid;
+int special_reloc_ofs;
+int special_line_ofs;
+int special_batch_len;
+
+#define GFX_OP_PIPE_CONTROL	((0x3<<29)|(0x3<<27)|(0x2<<24)|2)
+#define   PIPE_CONTROL_WRITE_IMMEDIATE	(1<<14)
+#define   PIPE_CONTROL_WRITE_TIMESTAMP	(3<<14)
+#define   PIPE_CONTROL_DEPTH_STALL (1<<13)
+#define   PIPE_CONTROL_WC_FLUSH	(1<<12)
+#define   PIPE_CONTROL_IS_FLUSH	(1<<11) /* MBZ on Ironlake */
+#define   PIPE_CONTROL_TC_FLUSH (1<<10) /* GM45+ only */
+#define   PIPE_CONTROL_STALL_AT_SCOREBOARD (1<<1)
+#define   PIPE_CONTROL_CS_STALL	(1<<20)
+#define   PIPE_CONTROL_GLOBAL_GTT (1<<2) /* in addr dword */
+
+int small_pitch = 64;
+
+static drm_intel_bo *create_special_bo(void)
+{
+	drm_intel_bo *bo;
+	uint32_t data[1024];
+	int len = 0;
+#define BATCH(dw) data[len++] = (dw);
+
+	memset(data, 0, 4096);
+	bo = drm_intel_bo_alloc(bufmgr, "special batch", 4096, 4096);
+
+	BATCH(XY_COLOR_BLT_CMD | COLOR_BLT_WRITE_ALPHA | XY_COLOR_BLT_WRITE_RGB);
+	BATCH((3 << 24) | (0xf0 << 16) | small_pitch);
+	special_line_ofs = 4*len;
+	BATCH(0);
+	BATCH(1 << 16 | 1);
+	special_reloc_ofs = 4*len;
+	BATCH(0);
+	BATCH(0xdeadbeef);
+
+#define CMD_POLY_STIPPLE_OFFSET       0x7906
+	/* batchbuffer end */
+	if (IS_GEN5(batch->devid)) {
+		BATCH(CMD_POLY_STIPPLE_OFFSET << 16);
+		BATCH(0);
+	}
+	igt_assert(len % 2 == 0);
+	BATCH(MI_NOOP);
+	BATCH(MI_BATCH_BUFFER_END);
+
+	drm_intel_bo_subdata(bo, 0, 4096, data);
+	special_batch_len = len*4;
+
+	return bo;
+}
+
+static void emit_dummy_load(int pitch)
+{
+	int i;
+	uint32_t tile_flags = 0;
+
+	if (IS_965(devid)) {
+		pitch /= 4;
+		tile_flags = XY_SRC_COPY_BLT_SRC_TILED |
+			XY_SRC_COPY_BLT_DST_TILED;
+	}
+
+	for (i = 0; i < 10; i++) {
+		BEGIN_BATCH(8);
+		OUT_BATCH(XY_SRC_COPY_BLT_CMD |
+			  XY_SRC_COPY_BLT_WRITE_ALPHA |
+			  XY_SRC_COPY_BLT_WRITE_RGB |
+			  tile_flags);
+		OUT_BATCH((3 << 24) | /* 32 bits */
+			  (0xcc << 16) | /* copy ROP */
+			  pitch);
+		OUT_BATCH(0 << 16 | 1024);
+		OUT_BATCH((2048) << 16 | (2048));
+		OUT_RELOC_FENCED(dummy_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
+		OUT_BATCH(0 << 16 | 0);
+		OUT_BATCH(pitch);
+		OUT_RELOC_FENCED(dummy_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
+		ADVANCE_BATCH();
+
+		if (IS_GEN6(devid) || IS_GEN7(devid)) {
+			BEGIN_BATCH(3);
+			OUT_BATCH(XY_SETUP_CLIP_BLT_CMD);
+			OUT_BATCH(0);
+			OUT_BATCH(0);
+			ADVANCE_BATCH();
+		}
+	}
+	intel_batchbuffer_flush(batch);
+}
+
+static void faulting_reloc_and_emit(int fd, drm_intel_bo *target_bo,
+				    void *gtt_relocs, drm_intel_bo *special_bo)
+{
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec[2];
+	int ring;
+
+	if (intel_gen(devid) >= 6)
+		ring = I915_EXEC_BLT;
+	else
+		ring = 0;
+
+	exec[0].handle = target_bo->handle;
+	exec[0].relocation_count = 0;
+	exec[0].relocs_ptr = 0;
+	exec[0].alignment = 0;
+	exec[0].offset = 0;
+	exec[0].flags = 0;
+	exec[0].rsvd1 = 0;
+	exec[0].rsvd2 = 0;
+
+	exec[1].handle = special_bo->handle;
+	exec[1].relocation_count = 1;
+	/* A newly mmap gtt bo will fault on first access. */
+	exec[1].relocs_ptr = (uintptr_t)gtt_relocs;
+	exec[1].alignment = 0;
+	exec[1].offset = 0;
+	exec[1].flags = 0;
+	exec[1].rsvd1 = 0;
+	exec[1].rsvd2 = 0;
+
+	execbuf.buffers_ptr = (uintptr_t)exec;
+	execbuf.buffer_count = 2;
+	execbuf.batch_start_offset = 0;
+	execbuf.batch_len = special_batch_len;
+	execbuf.cliprects_ptr = 0;
+	execbuf.num_cliprects = 0;
+	execbuf.DR1 = 0;
+	execbuf.DR4 = 0;
+	execbuf.flags = ring;
+	i915_execbuffer2_set_context_id(execbuf, 0);
+	execbuf.rsvd2 = 0;
+
+	gem_execbuf(fd, &execbuf);
+}
+
+static void do_test(int fd, bool faulting_reloc)
+{
+	uint32_t tiling_mode = I915_TILING_X;
+	unsigned long pitch, act_size;
+	uint32_t test;
+	int i, repeat;
+
+	if (faulting_reloc)
+		igt_disable_prefault();
+
+	act_size = 2048;
+	dummy_bo = drm_intel_bo_alloc_tiled(bufmgr, "tiled dummy_bo", act_size, act_size,
+				      4, &tiling_mode, &pitch, 0);
+
+	drm_intel_bo_subdata(dummy_bo, 0, act_size*act_size*4, blob);
+
+	for (i = 0; i < NUM_TARGET_BOS; i++) {
+		struct drm_i915_gem_relocation_entry reloc[1];
+
+		special_bos[i] = create_special_bo();
+		pc_target_bo[i] = drm_intel_bo_alloc(bufmgr, "special batch", 4096, 4096);
+		igt_assert(pc_target_bo[i]->offset == 0);
+
+		reloc[0].offset = special_reloc_ofs;
+		reloc[0].delta = 0;
+		reloc[0].target_handle = pc_target_bo[i]->handle;
+		reloc[0].read_domains = I915_GEM_DOMAIN_RENDER;
+		reloc[0].write_domain = I915_GEM_DOMAIN_RENDER;
+		reloc[0].presumed_offset = 0;
+
+		relocs_bo_handle[i] = gem_create(fd, 4096);
+		gem_write(fd, relocs_bo_handle[i], 0, reloc, sizeof(reloc));
+		gtt_relocs_ptr[i] = gem_mmap(fd, relocs_bo_handle[i], 4096,
+				      PROT_READ | PROT_WRITE);
+		igt_assert(gtt_relocs_ptr[i]);
+
+	}
+
+	for (repeat = 0; repeat < 4096/small_pitch; repeat++) {
+		for (i = 0; i < NUM_TARGET_BOS; i++) {
+			uint32_t data[2] = {
+				(repeat << 16) | 0,
+				((repeat + 1) << 16) | 1
+			};
+
+			drm_intel_bo_subdata(special_bos[i], special_line_ofs, 8, &data);
+
+			emit_dummy_load(pitch);
+			faulting_reloc_and_emit(fd, pc_target_bo[i],
+						gtt_relocs_ptr[i],
+						special_bos[i]);
+		}
+	}
+
+	/* Only check at the end to avoid unnecessarily synchronous behaviour. */
+	for (i = 0; i < NUM_TARGET_BOS; i++) {
+		for (repeat = 0; repeat < 4096/small_pitch; repeat++) {
+			drm_intel_bo_get_subdata(pc_target_bo[i],
+						 repeat*small_pitch, 4, &test);
+			if (test != 0xdeadbeef) {
+				fprintf(stderr, "mismatch in buffer %i: 0x%08x instead of 0xdeadbeef at offset %i\n",
+					i, test, repeat*small_pitch);
+				igt_fail(1);
+			}
+		}
+		drm_intel_bo_unreference(pc_target_bo[i]);
+		drm_intel_bo_unreference(special_bos[i]);
+		gem_close(fd, relocs_bo_handle[i]);
+		munmap(gtt_relocs_ptr[i], 4096);
+	}
+
+	drm_intel_gem_bo_map_gtt(dummy_bo);
+	drm_intel_gem_bo_unmap_gtt(dummy_bo);
+
+	drm_intel_bo_unreference(dummy_bo);
+
+	if (faulting_reloc)
+		igt_enable_prefault();
+}
+
+#define INTERRUPT	(1 << 0)
+#define FAULTING	(1 << 1)
+#define THRASH		(1 << 2)
+#define THRASH_INACTIVE	(1 << 3)
+#define ALL_FLAGS	(INTERRUPT | FAULTING | THRASH | THRASH_INACTIVE)
+static void do_forked_test(int fd, unsigned flags)
+{
+	int num_threads = sysconf(_SC_NPROCESSORS_ONLN);
+	pid_t pid = -1;
+
+	if (flags & (THRASH | THRASH_INACTIVE)) {
+		sighandler_t oldsig;
+		char fname[FILENAME_MAX];
+		int drop_caches_fd;
+		const char *data = THRASH_INACTIVE ? "0xf" : "0x7";
+
+		snprintf(fname, FILENAME_MAX, "%s/%i/%s",
+			 "/sys/kernel/debug/dri", drm_get_card(),
+			 "i915_gem_drop_caches");
+
+		drop_caches_fd = open(fname, O_WRONLY);
+		igt_require(drop_caches_fd >= 0);
+
+		oldsig = signal(SIGQUIT, SIG_DFL);
+		pid = fork();
+		signal(SIGQUIT, oldsig);
+		if (pid == 0) {
+			while (1) {
+				usleep(1000);
+				igt_assert(write(drop_caches_fd, data, strlen(data) + 1) == strlen(data) + 1);
+			}
+		}
+	}
+
+	igt_fork(i, num_threads) {
+		/* re-create process local data */
+		bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+		batch = intel_batchbuffer_alloc(bufmgr, devid);
+
+		if (flags & INTERRUPT)
+			igt_fork_signal_helper();
+
+		do_test(fd, flags & FAULTING);
+
+		if (flags & INTERRUPT)
+			igt_stop_signal_helper();
+	}
+
+	igt_waitchildren();
+
+	if (pid != -1) {
+		int exitcode;
+
+		kill(pid, SIGQUIT);
+		wait(&exitcode);
+	}
+}
+
+int fd;
+
+#define MAX_BLT_SIZE 128
+int main(int argc, char **argv)
+{
+	igt_subtest_init(argc, argv);
+	igt_skip_on_simulation();
+
+	memset(blob, 'A', sizeof(blob));
+
+	igt_fixture {
+		fd = drm_open_any();
+
+		bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+		/* disable reuse, otherwise the test fails */
+		//drm_intel_bufmgr_gem_enable_reuse(bufmgr);
+		devid = intel_get_drm_devid(fd);
+		batch = intel_batchbuffer_alloc(bufmgr, devid);
+	}
+
+	igt_subtest("normal")
+		do_test(fd, false);
+
+	igt_fork_signal_helper();
+	igt_subtest("interruptible")
+		do_test(fd, false);
+	igt_stop_signal_helper();
+
+	for (unsigned flags = 0; flags <= ALL_FLAGS; flags++) {
+		if ((flags & THRASH) && (flags & THRASH_INACTIVE))
+			continue;
+
+		igt_subtest_f("forked%s%s%s%s",
+			      flags & INTERRUPT ? "-interruptible" : "",
+			      flags & FAULTING ? "-faulting-reloc" : "",
+			      flags & THRASH ? "-thrashing" : "",
+			      flags & THRASH ? "-thrash-inactive" : "")
+			do_forked_test(fd, flags);
+	}
+
+	igt_fixture {
+		intel_batchbuffer_free(batch);
+		drm_intel_bufmgr_destroy(bufmgr);
+
+		close(fd);
+	}
+
+	return 0;
+}