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/*
* Copyright © 2014 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.
*/
#include "gem_ring.h"
#include <signal.h>
#include <sys/ioctl.h>
#include "intel_reg.h"
#include "drmtest.h"
#include "ioctl_wrappers.h"
#include "igt_dummyload.h"
static void alarm_handler(int sig)
{
}
/**
* gem_measure_ring_inflight:
* @fd: open i915 drm file descriptor
* @engine: execbuf engine flag
* @flags: flags to affect measurement:
* - MEASURE_RING_NEW_CTX: use a new context to account for the space
* used by the lrc init.
*
* This function calculates the maximum number of batches that can be inserted
* at the same time in the ring on the selected engine.
*
* Returns:
* Number of batches that fit in the ring
*/
unsigned int
gem_measure_ring_inflight(int fd, unsigned int engine, enum measure_ring_flags flags)
{
struct sigaction old_sa, sa = { .sa_handler = alarm_handler };
struct drm_i915_gem_exec_object2 obj[2];
struct drm_i915_gem_execbuffer2 execbuf;
const uint32_t bbe = MI_BATCH_BUFFER_END;
unsigned int count, last;
struct itimerval itv;
IGT_CORK_HANDLE(cork);
memset(obj, 0, sizeof(obj));
obj[1].handle = gem_create(fd, 4096);
gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe));
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = to_user_pointer(&obj[1]);
execbuf.buffer_count = 1;
execbuf.flags = engine;
gem_execbuf(fd, &execbuf);
gem_sync(fd, obj[1].handle);
obj[0].handle = igt_cork_plug(&cork, fd);
execbuf.buffers_ptr = to_user_pointer(obj);
execbuf.buffer_count = 2;
if (flags & MEASURE_RING_NEW_CTX)
execbuf.rsvd1 = gem_context_create(fd);
sigaction(SIGALRM, &sa, &old_sa);
itv.it_interval.tv_sec = 0;
itv.it_interval.tv_usec = 100;
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 1000;
setitimer(ITIMER_REAL, &itv, NULL);
last = -1;
count = 0;
do {
if (ioctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf) == 0) {
count++;
continue;
}
if (last == count)
break;
last = count;
} while (1);
memset(&itv, 0, sizeof(itv));
setitimer(ITIMER_REAL, &itv, NULL);
sigaction(SIGALRM, &old_sa, NULL);
igt_cork_unplug(&cork);
gem_close(fd, obj[0].handle);
gem_close(fd, obj[1].handle);
if (flags & MEASURE_RING_NEW_CTX)
gem_context_destroy(fd, execbuf.rsvd1);
gem_quiescent_gpu(fd);
return count;
}
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