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misc: mic: SCIF poll

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SCIF poll allows both user and kernel mode clients to wait on
events on a SCIF endpoint. These events include availability of
space or data in the SCIF ring buffer, availability of connection
requests on a listening endpoint and completion of connections
when using async connects.

Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ashutosh Dixit
2015-09-29 18:10:44 -07:00
committed by Greg Kroah-Hartman
parent ff39988abd
commit b7f944411b
5 changed files with 264 additions and 1 deletions
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9
drivers/misc/mic/scif/scif_fd.c
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@@ -34,6 +34,13 @@ static int scif_fdclose(struct inode *inode, struct file *f)
return scif_close(priv);
}
static unsigned int scif_fdpoll(struct file *f, poll_table *wait)
{
struct scif_endpt *priv = f->private_data;
return __scif_pollfd(f, wait, priv);
}
static int scif_fdflush(struct file *f, fl_owner_t id)
{
struct scif_endpt *ep = f->private_data;
@@ -193,6 +200,7 @@ static long scif_fdioctl(struct file *f, unsigned int cmd, unsigned long arg)
spin_unlock(&scif_info.eplock);
/* Free the resources automatically created from the open. */
scif_anon_inode_fput(priv);
scif_teardown_ep(priv);
scif_add_epd_to_zombie_list(priv, !SCIF_EPLOCK_HELD);
f->private_data = newep;
@@ -298,6 +306,7 @@ const struct file_operations scif_fops = {
.open = scif_fdopen,
.release = scif_fdclose,
.unlocked_ioctl = scif_fdioctl,
.poll = scif_fdpoll,
.flush = scif_fdflush,
.owner = THIS_MODULE,
};