From 3c7c8468e5d993dfe377a67e41cbb23cda93af9e Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Sun, 26 Jul 2015 09:54:20 +0300 Subject: mei: add async event notification ioctls Add ioctl IOCTL_MEI_NOTIFY_SET for enabling and disabling async event notification. Add ioctl IOCTL_MEI_NOTIFY_GET for receiving and acking an event notification. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/main.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) (limited to 'drivers/misc/mei') diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index e9513d651cd3..ffa70035af29 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -445,6 +445,45 @@ end: return rets; } +/** + * mei_ioctl_client_notify_request - + * propagate event notification request to client + * + * @file: pointer to file structure + * @request: 0 - disable, 1 - enable + * + * Return: 0 on success , <0 on error + */ +static int mei_ioctl_client_notify_request(struct file *file, u32 request) +{ + struct mei_cl *cl = file->private_data; + + return mei_cl_notify_request(cl, file, request); +} + +/** + * mei_ioctl_client_notify_get - wait for notification request + * + * @file: pointer to file structure + * @notify_get: 0 - disable, 1 - enable + * + * Return: 0 on success , <0 on error + */ +static int mei_ioctl_client_notify_get(struct file *file, u32 *notify_get) +{ + struct mei_cl *cl = file->private_data; + bool notify_ev; + bool block = (file->f_flags & O_NONBLOCK) == 0; + int rets; + + rets = mei_cl_notify_get(cl, block, ¬ify_ev); + if (rets) + return rets; + + *notify_get = notify_ev ? 1 : 0; + return 0; +} + /** * mei_ioctl - the IOCTL function * @@ -459,6 +498,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) struct mei_device *dev; struct mei_cl *cl = file->private_data; struct mei_connect_client_data connect_data; + u32 notify_get, notify_req; int rets; @@ -499,6 +539,33 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) break; + case IOCTL_MEI_NOTIFY_SET: + dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_SET.\n"); + if (copy_from_user(¬ify_req, + (char __user *)data, sizeof(notify_req))) { + dev_dbg(dev->dev, "failed to copy data from userland\n"); + rets = -EFAULT; + goto out; + } + rets = mei_ioctl_client_notify_request(file, notify_req); + break; + + case IOCTL_MEI_NOTIFY_GET: + dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_GET.\n"); + rets = mei_ioctl_client_notify_get(file, ¬ify_get); + if (rets) + goto out; + + dev_dbg(dev->dev, "copy connect data to user\n"); + if (copy_to_user((char __user *)data, + ¬ify_get, sizeof(notify_get))) { + dev_dbg(dev->dev, "failed to copy data to userland\n"); + rets = -EFAULT; + goto out; + + } + break; + default: dev_err(dev->dev, ": unsupported ioctl %d.\n", cmd); rets = -ENOIOCTLCMD; -- cgit v1.2.3