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Staging: VME: Introduce IOCTL to generate VME interrupts.

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The vme_irq_set is oblviously not needed (a remnant from old tests) and the
IOCTL exchange types have been updated following Greg's comments.

Allow the IOCTL call to generate VME interrupts when called on the vme/ctl
device with the right arguments.

Signed-off-by: Vincent Bossier <vincent.bossier@gmail.com>
Acked-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vincent Bossier 2011-06-09 15:49:30 +02:00 committed by Greg Kroah-Hartman
parent 54b4a779c9
commit dca2218426
2 changed files with 22 additions and 0 deletions
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16
drivers/staging/vme/devices/vme_user.c
View file

@ -461,6 +461,7 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
{
struct vme_master master;
struct vme_slave slave;
struct vme_irq_id irq_req;
unsigned long copied;
unsigned int minor = MINOR(inode->i_rdev);
int retval;
@ -471,6 +472,21 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
switch (type[minor]) {
case CONTROL_MINOR:
switch (cmd) {
case VME_IRQ_GEN:
copied = copy_from_user(&irq_req, (char *)arg,
sizeof(struct vme_irq_id));
if (copied != 0) {
printk(KERN_WARNING "Partial copy from userspace\n");
return -EFAULT;
}
retval = vme_irq_generate(vme_user_bridge,
irq_req.level,
irq_req.statid);
return retval;
}
break;
case MASTER_MINOR:
switch (cmd) {

6
drivers/staging/vme/devices/vme_user.h
View file

@ -43,10 +43,16 @@ struct vme_slave {
#endif
};
struct vme_irq_id {
__u8 level;
__u8 statid;
};
#define VME_GET_SLAVE _IOR(VME_IOC_MAGIC, 1, struct vme_slave)
#define VME_SET_SLAVE _IOW(VME_IOC_MAGIC, 2, struct vme_slave)
#define VME_GET_MASTER _IOR(VME_IOC_MAGIC, 3, struct vme_master)
#define VME_SET_MASTER _IOW(VME_IOC_MAGIC, 4, struct vme_master)
#define VME_IRQ_GEN _IOW(VME_IOC_MAGIC, 5, struct vme_irq_id)
#endif /* _VME_USER_H_ */