linux/drivers/ieee1394/highlevel.h
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   1#ifndef IEEE1394_HIGHLEVEL_H
   2#define IEEE1394_HIGHLEVEL_H
   3
   4#include <linux/list.h>
   5#include <linux/spinlock.h>
   6#include <linux/types.h>
   7
   8struct module;
   9
  10#include "ieee1394_types.h"
  11
  12struct hpsb_host;
  13
  14/* internal to ieee1394 core */
  15struct hpsb_address_serve {
  16        struct list_head host_list;     /* per host list */
  17        struct list_head hl_list;       /* hpsb_highlevel list */
  18        struct hpsb_address_ops *op;
  19        struct hpsb_host *host;
  20        u64 start;      /* first address handled, quadlet aligned */
  21        u64 end;        /* first address behind, quadlet aligned */
  22};
  23
  24/* Only the following structures are of interest to actual highlevel drivers. */
  25
  26struct hpsb_highlevel {
  27        const char *name;
  28
  29        /* Any of the following pointers can legally be NULL. */
  30
  31        /* New host initialized.  Will also be called during
  32         * hpsb_register_highlevel for all hosts already installed. */
  33        void (*add_host)(struct hpsb_host *host);
  34
  35        /* Host about to be removed.  Will also be called during
  36         * hpsb_unregister_highlevel once for each host. */
  37        void (*remove_host)(struct hpsb_host *host);
  38
  39        /* Host experienced bus reset with possible configuration changes.
  40         * Note that this one may occur during interrupt/bottom half handling.
  41         * You can not expect to be able to do stock hpsb_reads. */
  42        void (*host_reset)(struct hpsb_host *host);
  43
  44        /* A write request was received on either the FCP_COMMAND (direction =
  45         * 0) or the FCP_RESPONSE (direction = 1) register.  The cts arg
  46         * contains the cts field (first byte of data). */
  47        void (*fcp_request)(struct hpsb_host *host, int nodeid, int direction,
  48                            int cts, u8 *data, size_t length);
  49
  50        /* These are initialized by the subsystem when the
  51         * hpsb_higlevel is registered. */
  52        struct list_head hl_list;
  53        struct list_head irq_list;
  54        struct list_head addr_list;
  55
  56        struct list_head host_info_list;
  57        rwlock_t host_info_lock;
  58};
  59
  60struct hpsb_address_ops {
  61        /*
  62         * Null function pointers will make the respective operation complete
  63         * with RCODE_TYPE_ERROR.  Makes for easy to implement read-only
  64         * registers (just leave everything but read NULL).
  65         *
  66         * All functions shall return appropriate IEEE 1394 rcodes.
  67         */
  68
  69        /* These functions have to implement block reads for themselves.
  70         *
  71         * These functions either return a response code or a negative number.
  72         * In the first case a response will be generated.  In the latter case,
  73         * no response will be sent and the driver which handled the request
  74         * will send the response itself. */
  75        int (*read)(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
  76                    u64 addr, size_t length, u16 flags);
  77        int (*write)(struct hpsb_host *host, int nodeid, int destid,
  78                     quadlet_t *data, u64 addr, size_t length, u16 flags);
  79
  80        /* Lock transactions: write results of ext_tcode operation into
  81         * *store. */
  82        int (*lock)(struct hpsb_host *host, int nodeid, quadlet_t *store,
  83                    u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
  84                    u16 flags);
  85        int (*lock64)(struct hpsb_host *host, int nodeid, octlet_t *store,
  86                      u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
  87                      u16 flags);
  88};
  89
  90void highlevel_add_host(struct hpsb_host *host);
  91void highlevel_remove_host(struct hpsb_host *host);
  92void highlevel_host_reset(struct hpsb_host *host);
  93int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr,
  94                   unsigned int length, u16 flags);
  95int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data,
  96                    u64 addr, unsigned int length, u16 flags);
  97int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
  98                   u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
  99                   u16 flags);
 100int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
 101                     u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
 102                     u16 flags);
 103void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
 104                           void *data, size_t length);
 105
 106/**
 107 * hpsb_init_highlevel - initialize a struct hpsb_highlevel
 108 *
 109 * This is only necessary if hpsb_get_hostinfo_bykey can be called
 110 * before hpsb_register_highlevel.
 111 */
 112static inline void hpsb_init_highlevel(struct hpsb_highlevel *hl)
 113{
 114        rwlock_init(&hl->host_info_lock);
 115        INIT_LIST_HEAD(&hl->host_info_list);
 116}
 117void hpsb_register_highlevel(struct hpsb_highlevel *hl);
 118void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);
 119
 120u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
 121                                         struct hpsb_host *host,
 122                                         struct hpsb_address_ops *ops,
 123                                         u64 size, u64 alignment,
 124                                         u64 start, u64 end);
 125int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
 126                            struct hpsb_address_ops *ops, u64 start, u64 end);
 127int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
 128                              u64 start);
 129
 130void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
 131void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 132                           size_t data_size);
 133void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
 134void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host,
 135                           unsigned long key);
 136void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
 137int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 138                      void *data);
 139
 140#endif /* IEEE1394_HIGHLEVEL_H */
 141