static int rtswitch_ioctl_rt(struct rtdm_dev_context *context,
rtdm_user_info_t *user_info,
unsigned int request,
void *arg)
{
rtswitch_context_t *ctx = (rtswitch_context_t *) context->dev_private;
struct rttst_swtest_task task;
struct rttst_swtest_dir fromto;
switch (request) {
case RTTST_RTIOC_SWTEST_REGISTER_UTASK:
case RTTST_RTIOC_SWTEST_CREATE_KTASK:
case RTTST_RTIOC_SWTEST_GET_SWITCHES_COUNT:
return -ENOSYS;
case RTTST_RTIOC_SWTEST_PEND:
if (!rtdm_read_user_ok(user_info, arg, sizeof(task)))
return -EFAULT;
rtdm_copy_from_user(user_info, &task, arg, sizeof(task));
return rtswitch_pend_rt(ctx, task.index);
case RTTST_RTIOC_SWTEST_SWITCH_TO:
if (!rtdm_read_user_ok(user_info, arg, sizeof(fromto)))
return -EFAULT;
rtdm_copy_from_user(user_info,
&fromto,
arg,
sizeof(fromto));
return rtswitch_to_rt(ctx, fromto.from, fromto.to);
case RTTST_RTIOC_SWTEST_GET_LAST_ERROR:
if (!rtdm_rw_user_ok(user_info, arg, sizeof(ctx->error)))
return -EFAULT;
rtdm_copy_to_user(user_info,
arg,
&ctx->error,
sizeof(ctx->error));
return 0;
default:
return -ENOTTY;
}
}
int demo_ioctl_rt(struct rtdm_dev_context *context,
rtdm_user_info_t *user_info,
unsigned int request,
void *arg)
{
struct demodrv_context *my_context;
#ifdef USEMMAP
int err;
#endif
int ret = 0;
my_context = (struct demodrv_context *)context->dev_private;
switch (request) {
case MMAP: // set mmap pointer
#ifdef USEMMAP
printk("buf = %p:%x\n", my_context->buf, *(int *)my_context->buf);
err = rtdm_mmap_to_user(user_info, my_context->buf, BUFFER_SIZE,
PROT_READ|PROT_WRITE, (void **)arg, &mmap_ops,
(void *)0x12345678);
if (!err) {
my_context->mapped_user_info = user_info;
my_context->mapped_user_addr = *(void **)arg;
}
printk("rtdm_mmap = %p %d\n", my_context->mapped_user_info, err);
#else
return -EPERM;
#endif
break;
case GETVALUE: // write "ioctlvalue" to user
if (user_info) {
if (!rtdm_rw_user_ok(user_info, arg, sizeof(int)) ||
rtdm_copy_to_user(user_info, arg, &ioctlvalue,
sizeof(int)))
return -EFAULT;
} else
memcpy(arg, &ioctlvalue, sizeof(int));
break;
case SETVALUE: // read "ioctlvalue" from user
if (user_info) {
if ((unsigned long)arg < BUFFER_SIZE)
ioctlvalue = ((int *)my_context->buf)[(unsigned long)arg];
else if (!rtdm_read_user_ok(user_info, arg, sizeof(int)) ||
rtdm_copy_from_user(user_info, &ioctlvalue, arg,
sizeof(int)))
return -EFAULT;
}
break;
default:
ret = -ENOTTY;
}
return ret;
}
int demo_write_rt(struct rtdm_dev_context *context,
rtdm_user_info_t *user_info,
const void *buf, size_t nbyte)
{
struct demodrv_context *ctx;
int dev_id;
char *in_pos = (char *)buf;
int ret;
if (nbyte == 0)
return 0;
if (user_info && !rtdm_read_user_ok(user_info, buf, nbyte))
return -EFAULT;
ctx = (struct demodrv_context *)context->dev_private;
dev_id = ctx->dev_id;
// make write operation atomic
/* ret = rtdm_mutex_timedlock(&ctx->out_lock,
ctx->config.rx_timeout, &timeout_seq);
if (ret)
return ret; */
/* // if we need to do some stuff with preemption disabled:
rtdm_lock_get_irqsave(&ctx->lock, lock_ctx);
// stuff here
rtdm_lock_put_irqrestore(&ctx->lock, lock_ctx);
*/
// now copy the stuff from user-space to our kernel dummy_buffer
if (rtdm_copy_from_user(user_info, dummy_buffer,
in_pos, BUFSIZE) != 0) {
ret = -EFAULT;
} else {
ret = BUFSIZE;
}
// used when it is atomic
// rtdm_mutex_unlock(&ctx->out_lock);
return ret;
}
static int rtswitch_ioctl_nrt(struct rtdm_dev_context *context,
rtdm_user_info_t *user_info,
unsigned int request,
void *arg)
{
rtswitch_context_t *ctx = (rtswitch_context_t *) context->dev_private;
struct rttst_swtest_task task;
struct rttst_swtest_dir fromto;
unsigned long count;
int err;
switch (request)
{
case RTTST_RTIOC_SWTEST_SET_TASKS_COUNT:
return rtswitch_set_tasks_count(ctx,
(unsigned long) arg);
case RTTST_RTIOC_SWTEST_SET_CPU:
if ((unsigned long) arg > xnarch_num_online_cpus() - 1)
return -EINVAL;
ctx->cpu = (unsigned long) arg;
return 0;
case RTTST_RTIOC_SWTEST_SET_PAUSE:
ctx->pause_us = (unsigned long) arg;
return 0;
case RTTST_RTIOC_SWTEST_REGISTER_UTASK:
if (!rtdm_rw_user_ok(user_info, arg, sizeof(task)))
return -EFAULT;
rtdm_copy_from_user(user_info, &task, arg, sizeof(task));
err = rtswitch_register_task(ctx, &task);
if (!err)
rtdm_copy_to_user(user_info,
arg,
&task,
sizeof(task));
return err;
case RTTST_RTIOC_SWTEST_CREATE_KTASK:
if (!rtdm_rw_user_ok(user_info, arg, sizeof(task)))
return -EFAULT;
rtdm_copy_from_user(user_info, &task, arg, sizeof(task));
err = rtswitch_create_ktask(ctx, &task);
if (!err)
rtdm_copy_to_user(user_info,
arg,
&task,
sizeof(task));
return err;
case RTTST_RTIOC_SWTEST_PEND:
if (!rtdm_read_user_ok(user_info, arg, sizeof(task)))
return -EFAULT;
rtdm_copy_from_user(user_info, &task, arg, sizeof(task));
return rtswitch_pend_nrt(ctx, task.index);
case RTTST_RTIOC_SWTEST_SWITCH_TO:
if (!rtdm_read_user_ok(user_info, arg, sizeof(fromto)))
return -EFAULT;
rtdm_copy_from_user(user_info,
&fromto,
arg,
sizeof(fromto));
return rtswitch_to_nrt(ctx, fromto.from, fromto.to);
case RTTST_RTIOC_SWTEST_GET_SWITCHES_COUNT:
if (!rtdm_rw_user_ok(user_info, arg, sizeof(count)))
return -EFAULT;
count = ctx->switches_count;
rtdm_copy_to_user(user_info, arg, &count, sizeof(count));
return 0;
case RTTST_RTIOC_SWTEST_GET_LAST_ERROR:
if (!rtdm_rw_user_ok(user_info, arg, sizeof(ctx->error)))
return -EFAULT;
rtdm_copy_to_user(user_info,
arg,
&ctx->error,
sizeof(ctx->error));
return 0;
default:
return -ENOTTY;
}
}