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firewire: Generalize get_config_rom to get_info.

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Repurpose the get_config_rom ioctl to a general get_info ioctl.
This ioctl is now used for version negotiation, and optionally
returns the config rom, and the current bus info.

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 2007-03-07 12:12:43 -05:00 committed by Stefan Richter
parent 5371842b72
commit 344bbc4de1
2 changed files with 75 additions and 21 deletions
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65
drivers/firewire/fw-device-cdev.c
View file

@ -68,6 +68,7 @@ struct iso_interrupt {
};
struct client {
u32 version;
struct fw_device *device;
spinlock_t lock;
struct list_head handler_list;
@ -189,12 +190,26 @@ fw_device_op_read(struct file *file,
return dequeue_event(client, buffer, count);
}
static void
fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
struct fw_device *device)
{
struct fw_card *card = device->card;
event->type = FW_CDEV_EVENT_BUS_RESET;
event->node_id = device->node_id;
event->local_node_id = card->local_node->node_id;
event->bm_node_id = 0; /* FIXME: We don't track the BM. */
event->irm_node_id = card->irm_node->node_id;
event->root_node_id = card->root_node->node_id;
event->generation = card->generation;
}
static void
queue_bus_reset_event(struct client *client)
{
struct bus_reset *bus_reset;
struct fw_device *device = client->device;
struct fw_card *card = device->card;
bus_reset = kzalloc(sizeof *bus_reset, GFP_ATOMIC);
if (bus_reset == NULL) {
@ -202,13 +217,7 @@ queue_bus_reset_event(struct client *client)
return;
}
bus_reset->reset.type = FW_CDEV_EVENT_BUS_RESET;
bus_reset->reset.node_id = device->node_id;
bus_reset->reset.local_node_id = card->local_node->node_id;
bus_reset->reset.bm_node_id = 0; /* FIXME: We don't track the BM. */
bus_reset->reset.irm_node_id = card->irm_node->node_id;
bus_reset->reset.root_node_id = card->root_node->node_id;
bus_reset->reset.generation = card->generation;
fill_bus_reset_event(&bus_reset->reset, device);
queue_event(client, &bus_reset->event,
&bus_reset->reset, sizeof bus_reset->reset, NULL, 0);
@ -228,14 +237,36 @@ void fw_device_cdev_update(struct fw_device *device)
spin_unlock_irqrestore(&card->lock, flags);
}
static int ioctl_config_rom(struct client *client, void __user *arg)
static int ioctl_get_info(struct client *client, void __user *arg)
{
struct fw_cdev_get_config_rom rom;
struct fw_cdev_get_info get_info;
struct fw_cdev_event_bus_reset bus_reset;
rom.length = client->device->config_rom_length;
memcpy(rom.data, client->device->config_rom, rom.length * 4);
if (copy_to_user(arg, &rom,
(char *)&rom.data[rom.length] - (char *)&rom))
if (copy_from_user(&get_info, arg, sizeof get_info))
return -EFAULT;
client->version = get_info.version;
get_info.version = FW_CDEV_VERSION;
if (get_info.rom != 0) {
void __user *uptr = u64_to_uptr(get_info.rom);
size_t length = min(get_info.rom_length,
client->device->config_rom_length * 4);
if (copy_to_user(uptr, client->device->config_rom, length))
return -EFAULT;
}
get_info.rom_length = client->device->config_rom_length * 4;
if (get_info.bus_reset != 0) {
void __user *uptr = u64_to_uptr(get_info.bus_reset);
fill_bus_reset_event(&bus_reset, client->device);
if (copy_to_user(uptr, &bus_reset, sizeof bus_reset))
return -EFAULT;
}
if (copy_to_user(arg, &get_info, sizeof get_info))
return -EFAULT;
return 0;
@ -290,7 +321,7 @@ static ssize_t ioctl_send_request(struct client *client, void __user *arg)
}
fw_send_request(device->card, &response->transaction,
request.tcode,
request.tcode & 0x1f,
device->node->node_id,
device->card->generation,
device->node->max_speed,
@ -611,8 +642,8 @@ static int
dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
{
switch (cmd) {
case FW_CDEV_IOC_GET_CONFIG_ROM:
return ioctl_config_rom(client, arg);
case FW_CDEV_IOC_GET_INFO:
return ioctl_get_info(client, arg);
case FW_CDEV_IOC_SEND_REQUEST:
return ioctl_send_request(client, arg);
case FW_CDEV_IOC_ALLOCATE:

31
drivers/firewire/fw-device-cdev.h
View file

@ -104,7 +104,7 @@ struct fw_cdev_event_iso_interrupt {
__u32 header[0];
};
#define FW_CDEV_IOC_GET_CONFIG_ROM _IOR('#', 0x00, struct fw_cdev_get_config_rom)
#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)
@ -114,9 +114,32 @@ struct fw_cdev_event_iso_interrupt {
#define FW_CDEV_IOC_START_ISO _IO('#', 0x07)
#define FW_CDEV_IOC_STOP_ISO _IO('#', 0x08)
struct fw_cdev_get_config_rom {
__u32 length;
__u32 data[256];
/* FW_CDEV_VERSION History
*
* 1 Feb 18, 2007: Initial version.
*/
#define FW_CDEV_VERSION 1
struct fw_cdev_get_info {
/* The version field is just a running serial number. We
* never break backwards compatibility. Userspace passes in
* the version it expects and the kernel passes back the
* highest version it can provide. Even if the structs in
* this interface are extended in a later version, the kernel
* will not copy back more data than what was present in the
* interface version userspace expects. */
__u32 version;
/* If non-zero, at most rom_length bytes of config rom will be
* copied into that user space address. In either case,
* rom_length is updated with the actual length of the config
* rom. */
__u32 rom_length;
__u64 rom;
/* If non-zero, a fw_cdev_event_bus_reset struct will be
* copied here with the current state of the bus. */
__u64 bus_reset;
};
struct fw_cdev_send_request {