diff options
Diffstat (limited to 'drivers/misc/hpilo.c')
| -rw-r--r-- | drivers/misc/hpilo.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/drivers/misc/hpilo.c b/drivers/misc/hpilo.c index 9a370d5acf8..1ad27c6abcc 100644 --- a/drivers/misc/hpilo.c +++ b/drivers/misc/hpilo.c @@ -23,6 +23,7 @@ #include <linux/uaccess.h> #include <linux/io.h> #include <linux/wait.h> +#include <linux/poll.h> #include "hpilo.h" static struct class *ilo_class; @@ -102,6 +103,22 @@ static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry) return ret; } +static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar) +{ + struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); + unsigned long flags; + int ret = 0; + u64 c; + + spin_lock_irqsave(&hw->fifo_lock, flags); + c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; + if (c & ENTRY_MASK_C) + ret = 1; + spin_unlock_irqrestore(&hw->fifo_lock, flags); + + return ret; +} + static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb, int dir, int id, int len) { @@ -146,6 +163,13 @@ static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb, return ret; } +static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb) +{ + char *fifobar = ccb->ccb_u3.recv_fifobar; + + return fifo_check_recv(hw, fifobar); +} + static inline void doorbell_set(struct ccb *ccb) { iowrite8(1, ccb->ccb_u5.db_base); @@ -486,6 +510,21 @@ static ssize_t ilo_write(struct file *fp, const char __user *buf, return err ? -EFAULT : len; } +static unsigned int ilo_poll(struct file *fp, poll_table *wait) +{ + struct ccb_data *data = fp->private_data; + struct ccb *driver_ccb = &data->driver_ccb; + + poll_wait(fp, &data->ccb_waitq, wait); + + if (is_channel_reset(driver_ccb)) + return POLLERR; + else if (ilo_pkt_recv(data->ilo_hw, driver_ccb)) + return POLLIN | POLLRDNORM; + + return 0; +} + static int ilo_close(struct inode *ip, struct file *fp) { int slot; @@ -595,6 +634,7 @@ static const struct file_operations ilo_fops = { .owner = THIS_MODULE, .read = ilo_read, .write = ilo_write, + .poll = ilo_poll, .open = ilo_open, .release = ilo_close, }; @@ -835,7 +875,7 @@ static void __exit ilo_exit(void) class_destroy(ilo_class); } -MODULE_VERSION("1.1"); +MODULE_VERSION("1.2"); MODULE_ALIAS(ILO_NAME); MODULE_DESCRIPTION(ILO_NAME); MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>"); |