root/include/net/caif/cfctrl.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) ST-Ericsson AB 2010
   4  * Author:      Sjur Brendeland
   5  */
   6 
   7 #ifndef CFCTRL_H_
   8 #define CFCTRL_H_
   9 #include <net/caif/caif_layer.h>
  10 #include <net/caif/cfsrvl.h>
  11 
  12 /* CAIF Control packet commands */
  13 enum cfctrl_cmd {
  14         CFCTRL_CMD_LINK_SETUP = 0,
  15         CFCTRL_CMD_LINK_DESTROY = 1,
  16         CFCTRL_CMD_LINK_ERR = 2,
  17         CFCTRL_CMD_ENUM = 3,
  18         CFCTRL_CMD_SLEEP = 4,
  19         CFCTRL_CMD_WAKE = 5,
  20         CFCTRL_CMD_LINK_RECONF = 6,
  21         CFCTRL_CMD_START_REASON = 7,
  22         CFCTRL_CMD_RADIO_SET = 8,
  23         CFCTRL_CMD_MODEM_SET = 9,
  24         CFCTRL_CMD_MASK = 0xf
  25 };
  26 
  27 /* Channel types */
  28 enum cfctrl_srv {
  29         CFCTRL_SRV_DECM = 0,
  30         CFCTRL_SRV_VEI = 1,
  31         CFCTRL_SRV_VIDEO = 2,
  32         CFCTRL_SRV_DBG = 3,
  33         CFCTRL_SRV_DATAGRAM = 4,
  34         CFCTRL_SRV_RFM = 5,
  35         CFCTRL_SRV_UTIL = 6,
  36         CFCTRL_SRV_MASK = 0xf
  37 };
  38 
  39 #define CFCTRL_RSP_BIT 0x20
  40 #define CFCTRL_ERR_BIT 0x10
  41 
  42 struct cfctrl_rsp {
  43         void (*linksetup_rsp)(struct cflayer *layer, u8 linkid,
  44                               enum cfctrl_srv serv, u8 phyid,
  45                               struct cflayer *adapt_layer);
  46         void (*linkdestroy_rsp)(struct cflayer *layer, u8 linkid);
  47         void (*linkerror_ind)(void);
  48         void (*enum_rsp)(void);
  49         void (*sleep_rsp)(void);
  50         void (*wake_rsp)(void);
  51         void (*restart_rsp)(void);
  52         void (*radioset_rsp)(void);
  53         void (*reject_rsp)(struct cflayer *layer, u8 linkid,
  54                                 struct cflayer *client_layer);
  55 };
  56 
  57 /* Link Setup Parameters for CAIF-Links. */
  58 struct cfctrl_link_param {
  59         enum cfctrl_srv linktype;/* (T3,T0) Type of Channel */
  60         u8 priority;              /* (P4,P0) Priority of the channel */
  61         u8 phyid;                 /* (U2-U0) Physical interface to connect */
  62         u8 endpoint;              /* (E1,E0) Endpoint for data channels */
  63         u8 chtype;                /* (H1,H0) Channel-Type, applies to
  64                                    *            VEI, DEBUG */
  65         union {
  66                 struct {
  67                         u8 connid;      /*  (D7,D0) Video LinkId */
  68                 } video;
  69 
  70                 struct {
  71                         u32 connid;     /* (N31,Ngit0) Connection ID used
  72                                          *  for Datagram */
  73                 } datagram;
  74 
  75                 struct {
  76                         u32 connid;     /* Connection ID used for RFM */
  77                         char volume[20];        /* Volume to mount for RFM */
  78                 } rfm;          /* Configuration for RFM */
  79 
  80                 struct {
  81                         u16 fifosize_kb;        /* Psock FIFO size in KB */
  82                         u16 fifosize_bufs;      /* Psock # signal buffers */
  83                         char name[16];  /* Name of the PSOCK service */
  84                         u8 params[255]; /* Link setup Parameters> */
  85                         u16 paramlen;   /* Length of Link Setup
  86                                                  *   Parameters */
  87                 } utility;      /* Configuration for Utility Links (Psock) */
  88         } u;
  89 };
  90 
  91 /* This structure is used internally in CFCTRL */
  92 struct cfctrl_request_info {
  93         int sequence_no;
  94         enum cfctrl_cmd cmd;
  95         u8 channel_id;
  96         struct cfctrl_link_param param;
  97         struct cflayer *client_layer;
  98         struct list_head list;
  99 };
 100 
 101 struct cfctrl {
 102         struct cfsrvl serv;
 103         struct cfctrl_rsp res;
 104         atomic_t req_seq_no;
 105         atomic_t rsp_seq_no;
 106         struct list_head list;
 107         /* Protects from simultaneous access to first_req list */
 108         spinlock_t info_list_lock;
 109 #ifndef CAIF_NO_LOOP
 110         u8 loop_linkid;
 111         int loop_linkused[256];
 112         /* Protects simultaneous access to loop_linkid and loop_linkused */
 113         spinlock_t loop_linkid_lock;
 114 #endif
 115 
 116 };
 117 
 118 void cfctrl_enum_req(struct cflayer *cfctrl, u8 physlinkid);
 119 int cfctrl_linkup_request(struct cflayer *cfctrl,
 120                            struct cfctrl_link_param *param,
 121                            struct cflayer *user_layer);
 122 int  cfctrl_linkdown_req(struct cflayer *cfctrl, u8 linkid,
 123                          struct cflayer *client);
 124 
 125 struct cflayer *cfctrl_create(void);
 126 struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer);
 127 int cfctrl_cancel_req(struct cflayer *layr, struct cflayer *adap_layer);
 128 void cfctrl_remove(struct cflayer *layr);
 129 
 130 #endif                          /* CFCTRL_H_ */