231 lines
7.1 KiB
C
231 lines
7.1 KiB
C
#ifndef _IEEE1394_CORE_H
|
|
#define _IEEE1394_CORE_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/list.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/types.h>
|
|
#include <asm/atomic.h>
|
|
|
|
#include "hosts.h"
|
|
#include "ieee1394_types.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;
|
|
signed char ack_code;
|
|
unsigned 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 successful.
|
|
*/
|
|
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);
|
|
|
|
|
|
/*
|
|
* CHARACTER DEVICE DISPATCHING
|
|
*
|
|
* 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_MINOR_BLOCK_EXPERIMENTAL 15
|
|
|
|
#define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0)
|
|
#define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, \
|
|
IEEE1394_MINOR_BLOCK_RAW1394 * 16)
|
|
#define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, \
|
|
IEEE1394_MINOR_BLOCK_VIDEO1394 * 16)
|
|
#define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, \
|
|
IEEE1394_MINOR_BLOCK_DV1394 * 16)
|
|
#define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, \
|
|
IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 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 *hpsb_protocol_class;
|
|
|
|
#endif /* _IEEE1394_CORE_H */
|