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#ifndef _IEEE1394_CORE_H
#define _IEEE1394_CORE_H
#include <linux/slab.h>
#include <linux/devfs_fs_kernel.h>
#include <asm/atomic.h>
#include <asm/semaphore.h>
#include "hosts.h"
struct hpsb_packet {
/* This struct is basically read-only for hosts with the exception of
* the data buffer contents and xnext - see below. */
/* This can be used for host driver internal linking.
* NOTE: This must be left in init state when the driver is done
* with it (e.g. by using list_del_init()), since the core does
* some sanity checks to make sure the packet is not on a
* driver_list when free'ing it. */
struct list_head driver_list;
nodeid_t node_id;
/* Async and Iso types should be clear, raw means send-as-is, do not
* CRC! Byte swapping shall still be done in this case. */
enum { hpsb_async, hpsb_iso, hpsb_raw } __attribute__((packed)) type;
/* Okay, this is core internal and a no care for hosts.
* queued = queued for sending
* pending = sent, waiting for response
* complete = processing completed, successful or not
enum {
hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete
} __attribute__((packed)) state;
/* These are core internal. */
signed char tlabel;
char ack_code;
char tcode;
unsigned expect_response:1;
unsigned no_waiter:1;
/* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */
unsigned speed_code:2;
* *header and *data are guaranteed to be 32-bit DMAable and may be
* overwritten to allow in-place byte swapping. Neither of these is
* CRCed (the sizes also don't include CRC), but contain space for at
* least one additional quadlet to allow in-place CRCing. The memory is
* also guaranteed to be DMA mappable.
quadlet_t *header;
quadlet_t *data;
size_t header_size;
size_t data_size;
struct hpsb_host *host;
unsigned int generation;
atomic_t refcnt;
/* Function (and possible data to pass to it) to call when this
* packet is completed. */
void (*complete_routine)(void *);
void *complete_data;
/* XXX This is just a hack at the moment */
struct sk_buff *skb;
/* Store jiffies for implementing bus timeouts. */
unsigned long sendtime;
quadlet_t embedded_header[5];
/* Set a task for when a packet completes */
void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
void (*routine)(void *), void *data);
static inline struct hpsb_packet *driver_packet(struct list_head *l)
return list_entry(l, struct hpsb_packet, driver_list);
void abort_timedouts(unsigned long __opaque);
struct hpsb_packet *hpsb_alloc_packet(size_t data_size);
void hpsb_free_packet(struct hpsb_packet *packet);
* Generation counter for the complete 1394 subsystem. Generation gets
* incremented on every change in the subsystem (e.g. bus reset).
* Use the functions, not the variable.
static inline unsigned int get_hpsb_generation(struct hpsb_host *host)
return atomic_read(&host->generation);
* Send a PHY configuration packet, return 0 on success, negative
* errno on failure.
int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt);
* Queue packet for transmitting, return 0 on success, negative errno
* on failure.
int hpsb_send_packet(struct hpsb_packet *packet);
* Queue packet for transmitting, and block until the transaction
* completes. Return 0 on success, negative errno on failure.
int hpsb_send_packet_and_wait(struct hpsb_packet *packet);
/* Initiate bus reset on the given host. Returns 1 if bus reset already in
* progress, 0 otherwise. */
int hpsb_reset_bus(struct hpsb_host *host, int type);
* The following functions are exported for host driver module usage. All of
* them are safe to use in interrupt contexts, although some are quite
* complicated so you may want to run them in bottom halves instead of calling
* them directly.
/* Notify a bus reset to the core. Returns 1 if bus reset already in progress,
* 0 otherwise. */
int hpsb_bus_reset(struct hpsb_host *host);
* Hand over received selfid packet to the core. Complement check (second
* quadlet is complement of first) is expected to be done and succesful.
void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid);
* Notify completion of SelfID stage to the core and report new physical ID
* and whether host is root now.
void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot);
* Notify core of sending a packet. Ackcode is the ack code returned for async
* transmits or ACKX_SEND_ERROR if the transmission failed completely; ACKX_NONE
* for other cases (internal errors that don't justify a panic). Safe to call
* from within a transmit packet routine.
void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
int ackcode);
* Hand over received packet to the core. The contents of data are expected to
* be the full packet but with the CRCs left out (data block follows header
* immediately), with the header (i.e. the first four quadlets) in machine byte
* order and the data block in big endian. *data can be safely overwritten
* after this call.
* If the packet is a write request, write_acked is to be set to true if it was
* ack_complete'd already, false otherwise. This arg is ignored for any other
* packet type.
void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
int write_acked);
* All ieee1394 character device drivers share the same major number
* (major 171). The 256 minor numbers are allocated to the various
* task-specific interfaces (raw1394, video1394, dv1394, etc) in
* blocks of 16.
* The core ieee1394.o module allocates the device number region
* 171:0-255, the various drivers must then cdev_add() their cdev
* objects to handle their respective sub-regions.
* Minor device number block allocations:
* Block 0 ( 0- 15) raw1394
* Block 1 ( 16- 31) video1394
* Block 2 ( 32- 47) dv1394
* Blocks 3-14 free for future allocation
* Block 15 (240-255) reserved for drivers under development, etc.
#define IEEE1394_MAJOR 171
#define IEEE1394_MINOR_BLOCK_RAW1394 0
#define IEEE1394_MINOR_BLOCK_VIDEO1394 1
#define IEEE1394_MINOR_BLOCK_DV1394 2
#define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0)
#define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16)
#define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16)
/* return the index (within a minor number block) of a file */
static inline unsigned char ieee1394_file_to_instance(struct file *file)
return file->f_dentry->d_inode->i_cindex;
extern int hpsb_disable_irm;
/* Our sysfs bus entry */
extern struct bus_type ieee1394_bus_type;
extern struct class hpsb_host_class;
extern struct class_simple *hpsb_protocol_class;
#endif /* _IEEE1394_CORE_H */