drivers/net/wireless/brcm80211/brcmfmac/dhd_bus.h

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef _BRCMF_BUS_H_
  18 #define _BRCMF_BUS_H_
  19
  20 /* The level of bus communication with the dongle */
  21 enum brcmf_bus_state {
  22         BRCMF_BUS_DOWN,         /* Not ready for frame transfers */
  23         BRCMF_BUS_LOAD,         /* Download access only (CPU reset) */
  24         BRCMF_BUS_DATA          /* Ready for frame transfers */
  25 };
  26
  27 struct dngl_stats {
  28         unsigned long rx_packets;       /* total packets received */
  29         unsigned long tx_packets;       /* total packets transmitted */
  30         unsigned long rx_bytes; /* total bytes received */
  31         unsigned long tx_bytes; /* total bytes transmitted */
  32         unsigned long rx_errors;        /* bad packets received */
  33         unsigned long tx_errors;        /* packet transmit problems */
  34         unsigned long rx_dropped;       /* packets dropped by dongle */
  35         unsigned long tx_dropped;       /* packets dropped by dongle */
  36         unsigned long multicast;        /* multicast packets received */
  37 };
  38
  39 /* interface structure between common and bus layer */
  40 struct brcmf_bus {
  41         u8 type;                /* bus type */
  42         void *bus_priv;         /* pointer to bus private structure */
  43         void *drvr;             /* pointer to driver pub structure brcmf_pub */
  44         enum brcmf_bus_state state;
  45         uint maxctl;            /* Max size rxctl request from proto to bus */
  46         bool drvr_up;           /* Status flag of driver up/down */
  47         unsigned long tx_realloc;       /* Tx packets realloced for headroom */
  48         struct dngl_stats dstats;       /* Stats for dongle-based data */
  49         u8 align;               /* bus alignment requirement */
  50
  51         /* interface functions pointers */
  52         /* Stop bus module: clear pending frames, disable data flow */
  53         void (*brcmf_bus_stop)(struct device *);
  54         /* Initialize bus module: prepare for communication w/dongle */
  55         int (*brcmf_bus_init)(struct device *);
  56         /* Send a data frame to the dongle.  Callee disposes of txp. */
  57         int (*brcmf_bus_txdata)(struct device *, struct sk_buff *);
  58         /* Send/receive a control message to/from the dongle.
  59          * Expects caller to enforce a single outstanding transaction.
  60          */
  61         int (*brcmf_bus_txctl)(struct device *, unsigned char *, uint);
  62         int (*brcmf_bus_rxctl)(struct device *, unsigned char *, uint);
  63 };
  64
  65 /*
  66  * interface functions from common layer
  67  */
  68
  69 /* Remove any protocol-specific data header. */
  70 extern int brcmf_proto_hdrpull(struct device *dev, int *ifidx,
  71                                struct sk_buff *rxp);
  72
  73 extern bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
  74                          struct sk_buff *pkt, int prec);
  75
  76 /* Receive frame for delivery to OS.  Callee disposes of rxp. */
  77 extern void brcmf_rx_frame(struct device *dev, int ifidx,
  78                            struct sk_buff_head *rxlist);
  79 static inline void brcmf_rx_packet(struct device *dev, int ifidx,
  80                                    struct sk_buff *pkt)
  81 {
  82         struct sk_buff_head q;
  83
  84         skb_queue_head_init(&q);
  85         skb_queue_tail(&q, pkt);
  86         brcmf_rx_frame(dev, ifidx, &q);
  87 }
  88
  89 /* Indication from bus module regarding presence/insertion of dongle. */
  90 extern int brcmf_attach(uint bus_hdrlen, struct device *dev);
  91 /* Indication from bus module regarding removal/absence of dongle */
  92 extern void brcmf_detach(struct device *dev);
  93
  94 /* Indication from bus module to change flow-control state */
  95 extern void brcmf_txflowcontrol(struct device *dev, int ifidx, bool on);
  96
  97 /* Notify tx completion */
  98 extern void brcmf_txcomplete(struct device *dev, struct sk_buff *txp,
  99                              bool success);
 100
 101 extern int brcmf_bus_start(struct device *dev);
 102
 103 extern int brcmf_add_if(struct device *dev, int ifidx,
 104                         char *name, u8 *mac_addr);
 105 #endif                          /* _BRCMF_BUS_H_ */