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firewire: Implement deallocation of address ranges. 

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
hifive-unleashed-5.1
Kristian Høgsberg 2007-03-14 17:34:55 -04:00 committed by Stefan Richter
parent eb0306eac0
commit 9472316b6e
2 changed files with 39 additions and 6 deletions
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28
drivers/firewire/fw-device-cdev.c
View File

@ -467,6 +467,32 @@ static int ioctl_allocate(struct client *client, void __user *arg)
return 0;
}
static int ioctl_deallocate(struct client *client, void __user *arg)
{
struct fw_cdev_deallocate request;
struct address_handler *handler;
unsigned long flags;
if (copy_from_user(&request, arg, sizeof request))
return -EFAULT;
spin_lock_irqsave(&client->lock, flags);
list_for_each_entry(handler, &client->handler_list, link) {
if (handler->handler.offset == request.offset) {
list_del(&handler->link);
break;
}
}
spin_unlock_irqrestore(&client->lock, flags);
if (&handler->link == &client->handler_list)
return -EINVAL;
fw_core_remove_address_handler(&handler->handler);
return 0;
}
static int ioctl_send_response(struct client *client, void __user *arg)
{
struct fw_cdev_send_response request;
@ -696,6 +722,8 @@ dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
return ioctl_send_request(client, arg);
case FW_CDEV_IOC_ALLOCATE:
return ioctl_allocate(client, arg);
case FW_CDEV_IOC_DEALLOCATE:
return ioctl_deallocate(client, arg);
case FW_CDEV_IOC_SEND_RESPONSE:
return ioctl_send_response(client, arg);
case FW_CDEV_IOC_INITIATE_BUS_RESET:

17
drivers/firewire/fw-device-cdev.h
View File

@ -113,12 +113,13 @@ struct fw_cdev_event_iso_interrupt {
#define FW_CDEV_IOC_GET_INFO _IO('#', 0x00)
#define FW_CDEV_IOC_SEND_REQUEST _IO('#', 0x01)
#define FW_CDEV_IOC_ALLOCATE _IO('#', 0x02)
#define FW_CDEV_IOC_SEND_RESPONSE _IO('#', 0x03)
#define FW_CDEV_IOC_INITIATE_BUS_RESET _IO('#', 0x04)
#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IO('#', 0x05)
#define FW_CDEV_IOC_QUEUE_ISO _IO('#', 0x06)
#define FW_CDEV_IOC_START_ISO _IO('#', 0x07)
#define FW_CDEV_IOC_STOP_ISO _IO('#', 0x08)
#define FW_CDEV_IOC_DEALLOCATE _IO('#', 0x03)
#define FW_CDEV_IOC_SEND_RESPONSE _IO('#', 0x04)
#define FW_CDEV_IOC_INITIATE_BUS_RESET _IO('#', 0x05)
#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IO('#', 0x06)
#define FW_CDEV_IOC_QUEUE_ISO _IO('#', 0x07)
#define FW_CDEV_IOC_START_ISO _IO('#', 0x08)
#define FW_CDEV_IOC_STOP_ISO _IO('#', 0x09)
/* FW_CDEV_VERSION History
*
@ -173,6 +174,10 @@ struct fw_cdev_allocate {
__u32 length;
};
struct fw_cdev_deallocate {
__u64 offset;
};
#define FW_CDEV_LONG_RESET 0
#define FW_CDEV_SHORT_RESET 1