int gxio_mpipe_destroy(gxio_mpipe_context_t *context)
{
iounmap((void __force __iomem *)(context->mmio_cfg_base));
iounmap((void __force __iomem *)(context->mmio_fast_base));
return hv_dev_close(context->fd);
}
int __gxio_mpipe_init(gxio_mpipe_context_t *context, unsigned int mpipe_index,
unsigned int mode_flags)
{
char file[32];
int fd;
int i;
if (mpipe_index >= GXIO_MPIPE_INSTANCE_MAX)
return -EINVAL;
snprintf(file, sizeof(file), "mpipe/%d/iorpc", mpipe_index);
fd = hv_dev_open((HV_VirtAddr) file, 0);
context->fd = fd;
if (fd < 0) {
if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
return fd;
else
return -ENODEV;
}
/* Map in the MMIO space. */
context->mmio_cfg_base = (void __force *)
iorpc_ioremap(fd, HV_MPIPE_CONFIG_MMIO_OFFSET,
HV_MPIPE_CONFIG_MMIO_SIZE);
if (context->mmio_cfg_base == NULL)
goto cfg_failed;
context->mmio_fast_base = (void __force *)
iorpc_ioremap(fd, HV_MPIPE_FAST_MMIO_OFFSET,
HV_MPIPE_FAST_MMIO_SIZE);
if (context->mmio_fast_base == NULL)
goto fast_failed;
/* Initialize the stacks. */
for (i = 0; i < 8; i++)
context->__stacks.stacks[i] = 255;
context->instance = mpipe_index;
return 0;
fast_failed:
iounmap((void __force __iomem *)(context->mmio_cfg_base));
cfg_failed:
hv_dev_close(context->fd);
context->fd = -1;
return -ENODEV;
}
/*
* The HV driver could still be transmitting buffered data after this
* call.
*/
static void softuart_close(struct tty_struct *tty, struct file *filp)
{
struct softuart_private *softuartp = tty->driver_data;
unsigned long flags;
if (!softuartp) /* This means the open failed */
return;
spin_lock_irqsave(&softuartp->lock, flags);
if (tty->count == 1) {
/* This is the last device close. */
softuartp->tty = NULL;
softuart_configure_downcall(0);
}
spin_unlock_irqrestore(&softuartp->lock, flags);
hv_dev_close(softuart_fd);
}
