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firewire: Future proof the iso ioctls by adding a handle for the iso context.

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Currently create context always returns 0 and the other iso
ioctls will expect user space to pass that in for subsequent ioctls.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg 2007-04-30 15:03:14 -04:00 committed by Stefan Richter
parent 4f2592232e
commit abaa5743e3
2 changed files with 24 additions and 4 deletions
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16
drivers/firewire/fw-device-cdev.c
View file

@ -80,6 +80,7 @@ struct client {
u64 bus_reset_closure;
struct fw_iso_context *iso_context;
u64 iso_closure;
struct fw_iso_buffer buffer;
unsigned long vm_start;
@ -626,7 +627,7 @@ iso_callback(struct fw_iso_context *context, u32 cycle,
return;
interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
interrupt->interrupt.closure = 0;
interrupt->interrupt.closure = client->iso_closure;
interrupt->interrupt.cycle = cycle;
interrupt->interrupt.header_length = header_length;
memcpy(interrupt->interrupt.header, header, header_length);
@ -659,6 +660,7 @@ static int ioctl_create_iso_context(struct client *client, void *buffer)
return -EINVAL;
}
client->iso_closure = request->closure;
client->iso_context = fw_iso_context_create(client->device->card,
request->type,
request->channel,
@ -668,6 +670,9 @@ static int ioctl_create_iso_context(struct client *client, void *buffer)
if (IS_ERR(client->iso_context))
return PTR_ERR(client->iso_context);
/* We only support one context at this time. */
request->handle = 0;
return 0;
}
@ -683,7 +688,7 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
u8 header[256];
} u;
if (ctx == NULL)
if (ctx == NULL || request->handle != 0)
return -EINVAL;
/* If the user passes a non-NULL data pointer, has mmap()'ed
@ -759,6 +764,8 @@ static int ioctl_start_iso(struct client *client, void *buffer)
{
struct fw_cdev_start_iso *request = buffer;
if (request->handle != 0)
return -EINVAL;
if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) {
if (request->tags == 0 || request->tags > 15)
return -EINVAL;
@ -773,6 +780,11 @@ static int ioctl_start_iso(struct client *client, void *buffer)
static int ioctl_stop_iso(struct client *client, void *buffer)
{
struct fw_cdev_stop_iso *request = buffer;
if (request->handle != 0)
return -EINVAL;
return fw_iso_context_stop(client->iso_context);
}

12
drivers/firewire/fw-device-cdev.h
View file

@ -133,10 +133,10 @@ union fw_cdev_event {
#define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor)
#define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor)
#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOW('#', 0x08, struct fw_cdev_create_iso_context)
#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context)
#define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso)
#define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso)
#define FW_CDEV_IOC_STOP_ISO _IO('#', 0x0b)
#define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso)
/* FW_CDEV_VERSION History
*
@ -233,6 +233,8 @@ struct fw_cdev_create_iso_context {
__u32 header_size;
__u32 channel;
__u32 speed;
__u64 closure;
__u32 handle;
};
struct fw_cdev_iso_packet {
@ -249,12 +251,18 @@ struct fw_cdev_queue_iso {
__u64 packets;
__u64 data;
__u32 size;
__u32 handle;
};
struct fw_cdev_start_iso {
__s32 cycle;
__u32 sync;
__u32 tags;
__u32 handle;
};
struct fw_cdev_stop_iso {
__u32 handle;
};
#endif /* __fw_cdev_h */