drivers/ieee1394/highlevel.h

   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
   8 struct module;
   9
  10 #include "ieee1394_types.h"
  11
  12 struct hpsb_host;
  13
  14 /* internal to ieee1394 core */
  15 struct hpsb_address_serve {
  16         struct list_head host_list;     /* per host list */
  17         struct list_head hl_list;       /* hpsb_highlevel list */
  18         const 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
  26 struct 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
  60 struct 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
  90 void highlevel_add_host(struct hpsb_host *host);
  91 void highlevel_remove_host(struct hpsb_host *host);
  92 void highlevel_host_reset(struct hpsb_host *host);
  93 int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr,
  94                    unsigned int length, u16 flags);
  95 int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data,
  96                     u64 addr, unsigned int length, u16 flags);
  97 int 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);
 100 int 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);
 103 void 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  */
 112 static 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 }
 117 void hpsb_register_highlevel(struct hpsb_highlevel *hl);
 118 void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);
 119
 120 u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
 121                                          struct hpsb_host *host,
 122                                          const struct hpsb_address_ops *ops,
 123                                          u64 size, u64 alignment,
 124                                          u64 start, u64 end);
 125 int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
 126                             const struct hpsb_address_ops *ops,
 127                             u64 start, u64 end);
 128 int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
 129                               u64 start);
 130
 131 void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
 132 void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 133                            size_t data_size);
 134 void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
 135 void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host,
 136                            unsigned long key);
 137 void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
 138 int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 139                       void *data);
 140
 141 #endif /* IEEE1394_HIGHLEVEL_H */