1 files changed, 169 insertions, 0 deletions

diff --git a/include/os/posix/timers.c b/include/os/posix/timers.c
new file mode 100644
index 0000000..c84b0de
--- /dev/null
+++ b/include/os/posix/timers.c
@@ -0,0 +1,169 @@
+/*
+ * 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();
+}