From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: [PATCH 1/2] uio: add support for ioctls Date: Wed, 30 Sep 2015 15:28:57 -0700 Message-ID: <1443652138-31782-2-git-send-email-stephen@networkplumber.org> References: <1443652138-31782-1-git-send-email-stephen@networkplumber.org> Cc: dev@dpdk.org, linux-kernel@vger.kernel.org To: hjk@hansjkoch.de, gregkh@linux-foundation.org Return-path: Received: from mail-pa0-f54.google.com (mail-pa0-f54.google.com [209.85.220.54]) by dpdk.org (Postfix) with ESMTP id 251638D8A for ; Thu, 1 Oct 2015 00:28:52 +0200 (CEST) Received: by pacfv12 with SMTP id fv12so53962680pac.2 for ; Wed, 30 Sep 2015 15:28:51 -0700 (PDT) In-Reply-To: <1443652138-31782-1-git-send-email-stephen@networkplumber.org> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Allow UIO device driver to provide ioctl interface. This allow additional API's for UIO. Signed-off-by: Stephen Hemminger --- drivers/uio/uio.c | 15 +++++++++++++++ include/linux/uio_driver.h | 3 +++ 2 files changed, 18 insertions(+) diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 8196581..5ab32ab 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -576,6 +576,20 @@ static ssize_t uio_write(struct file *filep, const char __user *buf, return retval ? retval : sizeof(s32); } +static long uio_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) +{ + struct uio_listener *listener = filep->private_data; + struct uio_device *idev = listener->dev; + + if (!idev->info) + return -EIO; + + if (!idev->info->ioctl) + return -ENOTTY; + + return idev->info->ioctl(idev->info, cmd, arg); +} + static int uio_find_mem_index(struct vm_area_struct *vma) { struct uio_device *idev = vma->vm_private_data; @@ -712,6 +726,7 @@ static const struct file_operations uio_fops = { .write = uio_write, .mmap = uio_mmap, .poll = uio_poll, + .unlocked_ioctl = uio_ioctl, .fasync = uio_fasync, .llseek = noop_llseek, }; diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h index 32c0e83..10d7833 100644 --- a/include/linux/uio_driver.h +++ b/include/linux/uio_driver.h @@ -89,6 +89,7 @@ struct uio_device { * @mmap: mmap operation for this uio device * @open: open operation for this uio device * @release: release operation for this uio device + * @ioctl: ioctl handler * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX */ struct uio_info { @@ -105,6 +106,8 @@ struct uio_info { int (*open)(struct uio_info *info, struct inode *inode); int (*release)(struct uio_info *info, struct inode *inode); int (*irqcontrol)(struct uio_info *info, s32 irq_on); + int (*ioctl)(struct uio_info *info, unsigned int cmd, + unsigned long arg); }; extern int __must_check -- 2.1.4