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/*
* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
*
* 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 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 <sys/time.h>
#include <nvgpu/bug.h>
#include <nvgpu/log.h>
#include <nvgpu/timers.h>
static s64 now(void)
{
return nvgpu_current_time_ms();
}
/*
* Returns true if a > b;
*/
static bool time_after(s64 a, s64 b)
{
return a - b > 0;
}
int nvgpu_timeout_init(struct gk20a *g, struct nvgpu_timeout *timeout,
u32 duration, unsigned long flags)
{
if (flags & ~NVGPU_TIMER_FLAG_MASK)
return -EINVAL;
memset(timeout, 0, sizeof(*timeout));
timeout->g = g;
timeout->flags = flags;
if (flags & NVGPU_TIMER_RETRY_TIMER)
timeout->retries.max = duration;
else
timeout->time = nvgpu_current_time_ms() + (s64)duration;
return 0;
}
static int __nvgpu_timeout_expired_msg_cpu(struct nvgpu_timeout *timeout,
void *caller,
const char *fmt, va_list args)
{
struct gk20a *g = timeout->g;
if (time_after(now(), timeout->time)) {
if (!(timeout->flags & NVGPU_TIMER_SILENT_TIMEOUT)) {
char buf[128];
vsnprintf(buf, sizeof(buf), fmt, args);
nvgpu_err(g, "Timeout detected @ %p %s", caller, buf);
}
return -ETIMEDOUT;
}
return 0;
}
static int __nvgpu_timeout_expired_msg_retry(struct nvgpu_timeout *timeout,
void *caller,
const char *fmt, va_list args)
{
struct gk20a *g = timeout->g;
if (timeout->retries.attempted >= timeout->retries.max) {
if (!(timeout->flags & NVGPU_TIMER_SILENT_TIMEOUT)) {
char buf[128];
vsnprintf(buf, sizeof(buf), fmt, args);
nvgpu_err(g, "No more retries @ %p %s", caller, buf);
}
return -ETIMEDOUT;
}
timeout->retries.attempted++;
return 0;
}
int __nvgpu_timeout_expired_msg(struct nvgpu_timeout *timeout,
void *caller, const char *fmt, ...)
{
int ret;
va_list args;
va_start(args, fmt);
if (timeout->flags & NVGPU_TIMER_RETRY_TIMER)
ret = __nvgpu_timeout_expired_msg_retry(timeout, caller, fmt,
args);
else
ret = __nvgpu_timeout_expired_msg_cpu(timeout, caller, fmt,
args);
va_end(args);
return ret;
}
int nvgpu_timeout_peek_expired(struct nvgpu_timeout *timeout)
{
if (timeout->flags & NVGPU_TIMER_RETRY_TIMER)
return timeout->retries.attempted >= timeout->retries.max;
else
return time_after(now(), timeout->time);
}
void nvgpu_udelay(unsigned int usecs)
{
BUG();
}
void nvgpu_usleep_range(unsigned int min_us, unsigned int max_us)
{
BUG();
}
void nvgpu_msleep(unsigned int msecs)
{
BUG();
}
static inline s64 __nvgpu_current_time_us(void)
{
struct timeval now;
s64 time_now;
int ret;
ret = gettimeofday(&now, NULL);
if (ret != 0)
BUG();
time_now = ((s64)now.tv_sec * (s64)1000000) + (s64)now.tv_usec;
return time_now;
}
s64 nvgpu_current_time_ms(void)
{
return __nvgpu_current_time_us() / (s64)1000;
}
u64 nvgpu_hr_timestamp(void)
{
return __nvgpu_current_time_us();
}
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