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#ifndef IEEE1394_HIGHLEVEL_H
#define IEEE1394_HIGHLEVEL_H
/* internal to ieee1394 core */
struct hpsb_address_serve {
struct list_head host_list; /* per host list */
struct list_head hl_list; /* hpsb_highlevel list */
struct hpsb_address_ops *op;
struct hpsb_host *host;
u64 start; /* first address handled, quadlet aligned */
u64 end; /* first address behind, quadlet aligned */
};
/* Only the following structures are of interest to actual highlevel drivers. */
struct hpsb_highlevel {
struct module *owner;
const char *name;
/* Any of the following pointers can legally be NULL, except for
* iso_receive which can only be NULL when you don't request
* channels. */
/* New host initialized. Will also be called during
* hpsb_register_highlevel for all hosts already installed. */
void (*add_host)(struct hpsb_host *host);
/* Host about to be removed. Will also be called during
* hpsb_unregister_highlevel once for each host. */
void (*remove_host)(struct hpsb_host *host);
/* Host experienced bus reset with possible configuration changes.
* Note that this one may occur during interrupt/bottom half handling.
* You can not expect to be able to do stock hpsb_reads. */
void (*host_reset)(struct hpsb_host *host);
/* An isochronous packet was received. Channel contains the channel
* number for your convenience, it is also contained in the included
* packet header (first quadlet, CRCs are missing). You may get called
* for channel/host combinations you did not request. */
void (*iso_receive)(struct hpsb_host *host, int channel,
quadlet_t *data, size_t length);
/* A write request was received on either the FCP_COMMAND (direction =
* 0) or the FCP_RESPONSE (direction = 1) register. The cts arg
* contains the cts field (first byte of data). */
void (*fcp_request)(struct hpsb_host *host, int nodeid, int direction,
int cts, u8 *data, size_t length);
/* These are initialized by the subsystem when the
* hpsb_higlevel is registered. */
struct list_head hl_list;
struct list_head irq_list;
struct list_head addr_list;
struct list_head host_info_list;
rwlock_t host_info_lock;
};
struct hpsb_address_ops {
/*
* Null function pointers will make the respective operation complete
* with RCODE_TYPE_ERROR. Makes for easy to implement read-only
* registers (just leave everything but read NULL).
*
* All functions shall return appropriate IEEE 1394 rcodes.
*/
/* These functions have to implement block reads for themselves.
*
* These functions either return a response code or a negative number.
* In the first case a response will be generated. In the latter case,
* no response will be sent and the driver which handled the request
* will send the response itself. */
int (*read)(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
u64 addr, size_t length, u16 flags);
int (*write)(struct hpsb_host *host, int nodeid, int destid,
quadlet_t *data, u64 addr, size_t length, u16 flags);
/* Lock transactions: write results of ext_tcode operation into
* *store. */
int (*lock)(struct hpsb_host *host, int nodeid, quadlet_t *store,
u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
u16 flags);
int (*lock64)(struct hpsb_host *host, int nodeid, octlet_t *store,
u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
u16 flags);
};
void highlevel_add_host(struct hpsb_host *host);
void highlevel_remove_host(struct hpsb_host *host);
void highlevel_host_reset(struct hpsb_host *host);
/*
* These functions are called to handle transactions. They are called when a
* packet arrives. The flags argument contains the second word of the first
* header quadlet of the incoming packet (containing transaction label, retry
* code, transaction code and priority). These functions either return a
* response code or a negative number. In the first case a response will be
* generated. In the latter case, no response will be sent and the driver which
* handled the request will send the response itself.
*/
int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr,
unsigned int length, u16 flags);
int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data,
u64 addr, unsigned int length, u16 flags);
int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
u16 flags);
int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
u16 flags);
void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length);
void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
void *data, size_t length);
/*
* Register highlevel driver. The name pointer has to stay valid at all times
* because the string is not copied.
*/
void hpsb_register_highlevel(struct hpsb_highlevel *hl);
void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);
/*
* Register handlers for host address spaces. Start and end are 48 bit pointers
* and have to be quadlet aligned. Argument "end" points to the first address
* behind the handled addresses. This function can be called multiple times for
* a single hpsb_highlevel to implement sparse register sets. The requested
* region must not overlap any previously allocated region, otherwise
* registering will fail.
*
* It returns true for successful allocation. Address spaces can be
* unregistered with hpsb_unregister_addrspace. All remaining address spaces
* are automatically deallocated together with the hpsb_highlevel.
*/
u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
struct hpsb_host *host,
struct hpsb_address_ops *ops,
u64 size, u64 alignment,
u64 start, u64 end);
int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
struct hpsb_address_ops *ops, u64 start, u64 end);
int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
u64 start);
/*
* Enable or disable receving a certain isochronous channel through the
* iso_receive op.
*/
int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
unsigned int channel);
void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
unsigned int channel);
/* Retrieve a hostinfo pointer bound to this driver/host */
void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
/* Allocate a hostinfo pointer of data_size bound to this driver/host */
void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
size_t data_size);
/* Free and remove the hostinfo pointer bound to this driver/host */
void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
/* Set an alternate lookup key for the hostinfo bound to this driver/host */
void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host,
unsigned long key);
/* Retrieve the alternate lookup key for the hostinfo bound to this
* driver/host */
unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl,
struct hpsb_host *host);
/* Retrieve a hostinfo pointer bound to this driver using its alternate key */
void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
/* Set the hostinfo pointer to something useful. Usually follows a call to
* hpsb_create_hostinfo, where the size is 0. */
int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
void *data);
/* Retrieve hpsb_host using a highlevel handle and a key */
struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl,
unsigned long key);
#endif /* IEEE1394_HIGHLEVEL_H */
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