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

   1 /*
   2  * Copyright (c) 2012 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
  18 #ifndef FWEH_H_
  19 #define FWEH_H_
  20
  21 #include <asm/unaligned.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/if_ether.h>
  24 #include <linux/if.h>
  25
  26 /* formward declarations */
  27 struct brcmf_pub;
  28 struct brcmf_if;
  29 struct brcmf_cfg80211_info;
  30 struct brcmf_event;
  31
  32 /* list of firmware events */
  33 #define BRCMF_FWEH_EVENT_ENUM_DEFLIST \
  34         BRCMF_ENUM_DEF(SET_SSID, 0) \
  35         BRCMF_ENUM_DEF(JOIN, 1) \
  36         BRCMF_ENUM_DEF(START, 2) \
  37         BRCMF_ENUM_DEF(AUTH, 3) \
  38         BRCMF_ENUM_DEF(AUTH_IND, 4) \
  39         BRCMF_ENUM_DEF(DEAUTH, 5) \
  40         BRCMF_ENUM_DEF(DEAUTH_IND, 6) \
  41         BRCMF_ENUM_DEF(ASSOC, 7) \
  42         BRCMF_ENUM_DEF(ASSOC_IND, 8) \
  43         BRCMF_ENUM_DEF(REASSOC, 9) \
  44         BRCMF_ENUM_DEF(REASSOC_IND, 10) \
  45         BRCMF_ENUM_DEF(DISASSOC, 11) \
  46         BRCMF_ENUM_DEF(DISASSOC_IND, 12) \
  47         BRCMF_ENUM_DEF(QUIET_START, 13) \
  48         BRCMF_ENUM_DEF(QUIET_END, 14) \
  49         BRCMF_ENUM_DEF(BEACON_RX, 15) \
  50         BRCMF_ENUM_DEF(LINK, 16) \
  51         BRCMF_ENUM_DEF(MIC_ERROR, 17) \
  52         BRCMF_ENUM_DEF(NDIS_LINK, 18) \
  53         BRCMF_ENUM_DEF(ROAM, 19) \
  54         BRCMF_ENUM_DEF(TXFAIL, 20) \
  55         BRCMF_ENUM_DEF(PMKID_CACHE, 21) \
  56         BRCMF_ENUM_DEF(RETROGRADE_TSF, 22) \
  57         BRCMF_ENUM_DEF(PRUNE, 23) \
  58         BRCMF_ENUM_DEF(AUTOAUTH, 24) \
  59         BRCMF_ENUM_DEF(EAPOL_MSG, 25) \
  60         BRCMF_ENUM_DEF(SCAN_COMPLETE, 26) \
  61         BRCMF_ENUM_DEF(ADDTS_IND, 27) \
  62         BRCMF_ENUM_DEF(DELTS_IND, 28) \
  63         BRCMF_ENUM_DEF(BCNSENT_IND, 29) \
  64         BRCMF_ENUM_DEF(BCNRX_MSG, 30) \
  65         BRCMF_ENUM_DEF(BCNLOST_MSG, 31) \
  66         BRCMF_ENUM_DEF(ROAM_PREP, 32) \
  67         BRCMF_ENUM_DEF(PFN_NET_FOUND, 33) \
  68         BRCMF_ENUM_DEF(PFN_NET_LOST, 34) \
  69         BRCMF_ENUM_DEF(RESET_COMPLETE, 35) \
  70         BRCMF_ENUM_DEF(JOIN_START, 36) \
  71         BRCMF_ENUM_DEF(ROAM_START, 37) \
  72         BRCMF_ENUM_DEF(ASSOC_START, 38) \
  73         BRCMF_ENUM_DEF(IBSS_ASSOC, 39) \
  74         BRCMF_ENUM_DEF(RADIO, 40) \
  75         BRCMF_ENUM_DEF(PSM_WATCHDOG, 41) \
  76         BRCMF_ENUM_DEF(PROBREQ_MSG, 44) \
  77         BRCMF_ENUM_DEF(SCAN_CONFIRM_IND, 45) \
  78         BRCMF_ENUM_DEF(PSK_SUP, 46) \
  79         BRCMF_ENUM_DEF(COUNTRY_CODE_CHANGED, 47) \
  80         BRCMF_ENUM_DEF(EXCEEDED_MEDIUM_TIME, 48) \
  81         BRCMF_ENUM_DEF(ICV_ERROR, 49) \
  82         BRCMF_ENUM_DEF(UNICAST_DECODE_ERROR, 50) \
  83         BRCMF_ENUM_DEF(MULTICAST_DECODE_ERROR, 51) \
  84         BRCMF_ENUM_DEF(TRACE, 52) \
  85         BRCMF_ENUM_DEF(IF, 54) \
  86         BRCMF_ENUM_DEF(P2P_DISC_LISTEN_COMPLETE, 55) \
  87         BRCMF_ENUM_DEF(RSSI, 56) \
  88         BRCMF_ENUM_DEF(PFN_SCAN_COMPLETE, 57) \
  89         BRCMF_ENUM_DEF(EXTLOG_MSG, 58) \
  90         BRCMF_ENUM_DEF(ACTION_FRAME, 59) \
  91         BRCMF_ENUM_DEF(ACTION_FRAME_COMPLETE, 60) \
  92         BRCMF_ENUM_DEF(PRE_ASSOC_IND, 61) \
  93         BRCMF_ENUM_DEF(PRE_REASSOC_IND, 62) \
  94         BRCMF_ENUM_DEF(CHANNEL_ADOPTED, 63) \
  95         BRCMF_ENUM_DEF(AP_STARTED, 64) \
  96         BRCMF_ENUM_DEF(DFS_AP_STOP, 65) \
  97         BRCMF_ENUM_DEF(DFS_AP_RESUME, 66) \
  98         BRCMF_ENUM_DEF(ESCAN_RESULT, 69) \
  99         BRCMF_ENUM_DEF(ACTION_FRAME_OFF_CHAN_COMPLETE, 70) \
 100         BRCMF_ENUM_DEF(PROBERESP_MSG, 71) \
 101         BRCMF_ENUM_DEF(P2P_PROBEREQ_MSG, 72) \
 102         BRCMF_ENUM_DEF(DCS_REQUEST, 73) \
 103         BRCMF_ENUM_DEF(FIFO_CREDIT_MAP, 74) \
 104         BRCMF_ENUM_DEF(ACTION_FRAME_RX, 75) \
 105         BRCMF_ENUM_DEF(BCMC_CREDIT_SUPPORT, 127) \
 106         BRCMF_ENUM_DEF(PSTA_PRIMARY_INTF_IND, 128)
 107
 108 #define BRCMF_ENUM_DEF(id, val) \
 109         BRCMF_E_##id = (val),
 110
 111 /* firmware event codes sent by the dongle */
 112 enum brcmf_fweh_event_code {
 113         BRCMF_FWEH_EVENT_ENUM_DEFLIST
 114         BRCMF_E_LAST
 115 };
 116 #undef BRCMF_ENUM_DEF
 117
 118 #define BRCMF_EVENTING_MASK_LEN         DIV_ROUND_UP(BRCMF_E_LAST, 8)
 119
 120 /* flags field values in struct brcmf_event_msg */
 121 #define BRCMF_EVENT_MSG_LINK            0x01
 122 #define BRCMF_EVENT_MSG_FLUSHTXQ        0x02
 123 #define BRCMF_EVENT_MSG_GROUP           0x04
 124
 125 /**
 126  * definitions for event packet validation.
 127  */
 128 #define BRCMF_EVENT_OUI_OFFSET          19
 129 #define BRCM_OUI                        "\x00\x10\x18"
 130 #define DOT11_OUI_LEN                   3
 131 #define BCMILCP_BCM_SUBTYPE_EVENT       1
 132
 133
 134 /**
 135  * struct brcmf_event_msg - firmware event message.
 136  *
 137  * @version: version information.
 138  * @flags: event flags.
 139  * @event_code: firmware event code.
 140  * @status: status information.
 141  * @reason: reason code.
 142  * @auth_type: authentication type.
 143  * @datalen: lenght of event data buffer.
 144  * @addr: ether address.
 145  * @ifname: interface name.
 146  * @ifidx: interface index.
 147  * @bsscfgidx: bsscfg index.
 148  */
 149 struct brcmf_event_msg {
 150         u16 version;
 151         u16 flags;
 152         u32 event_code;
 153         u32 status;
 154         u32 reason;
 155         s32 auth_type;
 156         u32 datalen;
 157         u8 addr[ETH_ALEN];
 158         char ifname[IFNAMSIZ];
 159         u8 ifidx;
 160         u8 bsscfgidx;
 161 };
 162
 163 typedef int (*brcmf_fweh_handler_t)(struct brcmf_if *ifp,
 164                                     const struct brcmf_event_msg *evtmsg,
 165                                     void *data);
 166
 167 /**
 168  * struct brcmf_fweh_info - firmware event handling information.
 169  *
 170  * @event_work: event worker.
 171  * @evt_q_lock: lock for event queue protection.
 172  * @event_q: event queue.
 173  * @evt_handler: registered event handlers.
 174  */
 175 struct brcmf_fweh_info {
 176         struct work_struct event_work;
 177         spinlock_t evt_q_lock;
 178         struct list_head event_q;
 179         int (*evt_handler[BRCMF_E_LAST])(struct brcmf_if *ifp,
 180                                          const struct brcmf_event_msg *evtmsg,
 181                                          void *data);
 182 };
 183
 184 void brcmf_fweh_attach(struct brcmf_pub *drvr);
 185 void brcmf_fweh_detach(struct brcmf_pub *drvr);
 186 int brcmf_fweh_register(struct brcmf_pub *drvr, enum brcmf_fweh_event_code code,
 187                         int (*handler)(struct brcmf_if *ifp,
 188                                        const struct brcmf_event_msg *evtmsg,
 189                                        void *data));
 190 void brcmf_fweh_unregister(struct brcmf_pub *drvr,
 191                            enum brcmf_fweh_event_code code);
 192 int brcmf_fweh_activate_events(struct brcmf_if *ifp);
 193 void brcmf_fweh_process_event(struct brcmf_pub *drvr,
 194                               struct brcmf_event *event_packet);
 195
 196 static inline void brcmf_fweh_process_skb(struct brcmf_pub *drvr,
 197                                           struct sk_buff *skb)
 198 {
 199         struct brcmf_event *event_packet;
 200         u8 *data;
 201         u16 usr_stype;
 202
 203         /* only process events when protocol matches */
 204         if (skb->protocol != cpu_to_be16(ETH_P_LINK_CTL))
 205                 return;
 206
 207         /* check for BRCM oui match */
 208         event_packet = (struct brcmf_event *)skb_mac_header(skb);
 209         data = (u8 *)event_packet;
 210         data += BRCMF_EVENT_OUI_OFFSET;
 211         if (memcmp(BRCM_OUI, data, DOT11_OUI_LEN))
 212                 return;
 213
 214         /* final match on usr_subtype */
 215         data += DOT11_OUI_LEN;
 216         usr_stype = get_unaligned_be16(data);
 217         if (usr_stype != BCMILCP_BCM_SUBTYPE_EVENT)
 218                 return;
 219
 220         brcmf_fweh_process_event(drvr, event_packet);
 221 }
 222
 223 #endif /* FWEH_H_ */