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/*
* 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> (based on gem_storedw_*.c)
*
*/
/*
* Testcase: (TLB-)Coherency of pipe_control QW writes
*
* Writes a counter-value into an always newly allocated target bo (by disabling
* buffer reuse). Decently trashes on tlb inconsistencies, too.
*/
#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;
uint32_t devid;
#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 */
/* Like the store dword test, but we create new command buffers each time */
static void
store_pipe_control_loop(void)
{
int i, val = 0;
uint32_t *buf;
drm_intel_bo *target_bo;
for (i = 0; i < 0x10000; i++) {
/* we want to check tlb consistency of the pipe_control target,
* so get a new buffer every time around */
target_bo = drm_intel_bo_alloc(bufmgr, "target bo", 4096, 4096);
if (!target_bo) {
fprintf(stderr, "failed to alloc target buffer\n");
exit(-1);
}
/* gem_storedw_batches_loop.c is a bit overenthusiastic with
* creating new batchbuffers - with buffer reuse disabled, the
* support code will do that for us. */
if (intel_gen(devid) >= 6) {
/* work-around hw issue, see intel_emit_post_sync_nonzero_flush
* in mesa sources. */
BEGIN_BATCH(4);
OUT_BATCH(GFX_OP_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_CS_STALL |
PIPE_CONTROL_STALL_AT_SCOREBOARD);
OUT_BATCH(0); /* address */
OUT_BATCH(0); /* write data */
ADVANCE_BATCH();
BEGIN_BATCH(4);
OUT_BATCH(GFX_OP_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_WRITE_IMMEDIATE);
OUT_RELOC(target_bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT);
OUT_BATCH(val); /* write data */
ADVANCE_BATCH();
} else if (intel_gen(devid) >= 4) {
BEGIN_BATCH(4);
OUT_BATCH(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_WC_FLUSH |
PIPE_CONTROL_TC_FLUSH |
PIPE_CONTROL_WRITE_IMMEDIATE | 2);
OUT_RELOC(target_bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT);
OUT_BATCH(val);
OUT_BATCH(0xdeadbeef);
ADVANCE_BATCH();
}
intel_batchbuffer_flush_on_ring(batch, 0);
drm_intel_bo_map(target_bo, 1);
buf = target_bo->virtual;
if (buf[0] != val)
fprintf(stderr,
"value mismatch: cur 0x%08x, stored 0x%08x\n",
buf[0], val);
buf[0] = 0; /* let batch write it again */
drm_intel_bo_unmap(target_bo);
drm_intel_bo_unreference(target_bo);
val++;
}
printf("completed %d writes successfully\n", i);
}
int main(int argc, char **argv)
{
int fd;
if (argc != 1) {
fprintf(stderr, "usage: %s\n", argv[0]);
exit(-1);
}
fd = drm_open_any();
devid = intel_get_drm_devid(fd);
bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
if (!bufmgr) {
fprintf(stderr, "failed to init libdrm\n");
exit(-1);
}
if (IS_GEN2(devid) || IS_GEN3(devid)) {
fprintf(stderr, "no pipe_control on gen2/3\n");
return 77;
}
/* IMPORTANT: No call to
* drm_intel_bufmgr_gem_enable_reuse(bufmgr);
* here because we wan't to have fresh buffers (to trash the tlb)
* every time! */
batch = intel_batchbuffer_alloc(bufmgr, devid);
if (!batch) {
fprintf(stderr, "failed to create batch buffer\n");
exit(-1);
}
store_pipe_control_loop();
intel_batchbuffer_free(batch);
drm_intel_bufmgr_destroy(bufmgr);
close(fd);
return 0;
}
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