#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

#include "dump_log.h"

#define NSECS_PER_SEC 1000000000ULL

static void convert_to_ns(unsigned long long t,
			  unsigned long *secs, unsigned long *nsecs)
{
	*secs = (unsigned long)(t / 1000000000ULL);
	*nsecs = (unsigned long)(t % 1000000000ULL);
}

static void logdev_print_time_cpu(unsigned long long t, int cpu)
{
	unsigned long nsecs;
	unsigned long secs;

	convert_to_ns(t, &secs, &nsecs);

	printf("[%5lu.%06lu] cpu:%d ",
	       secs, nsecs/1000, cpu);
}

/* ------------------ place kernel printing here ----------------- */
static void logdev_print_hdr(int cpu,
			     struct logdev_mark_hdr *hdr)
{
	logdev_print_time_cpu(hdr->t, cpu);
}

static void logdev_mark_switch_print(int cpu, int size,
				     struct logdev_mark_switch *lm)
{
	logdev_print_hdr(cpu, &lm->hdr);

	printf("%s:%d(%d:%d:%d:%d) -->> ",
	       lm->prev_comm,
	       lm->pid_prev,
	       lm->prev_prio,
	       lm->prev_static_prio,
	       lm->prev_normal_prio,
	       lm->prev_rt_prio);

	printf("%s:%d(%d:%d:%d:%d)\n",
	       lm->next_comm,
	       lm->pid_next,
	       lm->next_prio,
	       lm->next_static_prio,
	       lm->next_normal_prio,
	       lm->next_rt_prio);
}

static void logdev_mark_mm_fault_print(int cpu, int size,
				       struct logdev_mark_mm_fault *lm)
{
	logdev_print_hdr(cpu, &lm->hdr);

	printf("%s:%d  mm=%p vma=%p  address=%lx  write_access=%d\n",
	       lm->comm,
	       lm->pid,
	       lm->mm,
	       lm->vma,
	       lm->address,
	       lm->write_access);
}

static void logdev_mark_getres_print(int cpu, int size,
				     struct logdev_mark_getres *lm)
{
	logdev_print_hdr(cpu, &lm->hdr);

	printf("%s:%d getres clock:%d\n", lm->comm, lm->pid, lm->clock);
}

static void logdev_mark_callback(struct logdev_header *hdr,
				 struct logdev_custom *custom,
				 int cpu,
				 void *rec)
{
	struct logdev_mark_hdr *lm = rec;

	switch (lm->id) {
	case LOGMARK_CNTXTSW:
		logdev_mark_switch_print(cpu, hdr->size, rec);
		break;
	case LOGMARK_MM_FAULT:
		logdev_mark_mm_fault_print(cpu, hdr->size, rec);
		break;
	case LOGMARK_GETRES:
		logdev_mark_getres_print(cpu, hdr->size, rec);
		break;
	default:
		printf("Unknown marker callback id %x\n",
		       custom->id);
		break;
	}
}

/* ---------------- end placement for user printing ------------ */

void logdev_setup_markers(void)
{
	logdev_register_callback(LOGMARK_ID_MARK, logdev_mark_callback);
}