1 /*- 2 * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org> 3 * 4 * Permission to use, copy, modify, and 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 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <sys/cdefs.h> 18 #include "opt_wlan.h" 19 20 #include <sys/param.h> 21 #include <sys/lock.h> 22 #include <sys/mutex.h> 23 #include <sys/mbuf.h> 24 #include <sys/kernel.h> 25 #include <sys/socket.h> 26 #include <sys/systm.h> 27 #include <sys/malloc.h> 28 #include <sys/queue.h> 29 #include <sys/taskqueue.h> 30 #include <sys/bus.h> 31 #include <sys/endian.h> 32 33 #include <net/if.h> 34 #include <net/ethernet.h> 35 #include <net/if_media.h> 36 37 #include <net80211/ieee80211_var.h> 38 #include <net80211/ieee80211_radiotap.h> 39 40 #include <dev/rtwn/if_rtwnvar.h> 41 42 #include <dev/rtwn/if_rtwn_task.h> 43 44 static void 45 rtwn_cmdq_cb(void *arg, int pending) 46 { 47 struct rtwn_softc *sc = arg; 48 struct rtwn_cmdq *item; 49 50 /* 51 * Device must be powered on (via rtwn_power_on()) 52 * before any command may be sent. 53 */ 54 RTWN_LOCK(sc); 55 if (!(sc->sc_flags & RTWN_RUNNING)) { 56 RTWN_UNLOCK(sc); 57 return; 58 } 59 60 RTWN_CMDQ_LOCK(sc); 61 while (sc->cmdq[sc->cmdq_first].func != NULL) { 62 item = &sc->cmdq[sc->cmdq_first]; 63 sc->cmdq_first = (sc->cmdq_first + 1) % RTWN_CMDQ_SIZE; 64 RTWN_CMDQ_UNLOCK(sc); 65 66 item->func(sc, &item->data); 67 68 RTWN_CMDQ_LOCK(sc); 69 memset(item, 0, sizeof (*item)); 70 } 71 RTWN_CMDQ_UNLOCK(sc); 72 RTWN_UNLOCK(sc); 73 } 74 75 void 76 rtwn_cmdq_init(struct rtwn_softc *sc) 77 { 78 RTWN_CMDQ_LOCK_INIT(sc); 79 TASK_INIT(&sc->cmdq_task, 0, rtwn_cmdq_cb, sc); 80 } 81 82 void 83 rtwn_cmdq_destroy(struct rtwn_softc *sc) 84 { 85 if (RTWN_CMDQ_LOCK_INITIALIZED(sc)) 86 RTWN_CMDQ_LOCK_DESTROY(sc); 87 } 88 89 int 90 rtwn_cmd_sleepable(struct rtwn_softc *sc, const void *ptr, size_t len, 91 CMD_FUNC_PROTO) 92 { 93 struct ieee80211com *ic = &sc->sc_ic; 94 95 KASSERT(len <= sizeof(union sec_param), ("buffer overflow")); 96 97 RTWN_CMDQ_LOCK(sc); 98 if (sc->sc_detached) { 99 RTWN_CMDQ_UNLOCK(sc); 100 return (ESHUTDOWN); 101 } 102 103 if (sc->cmdq[sc->cmdq_last].func != NULL) { 104 device_printf(sc->sc_dev, "%s: cmdq overflow\n", __func__); 105 RTWN_CMDQ_UNLOCK(sc); 106 107 return (EAGAIN); 108 } 109 110 if (ptr != NULL) 111 memcpy(&sc->cmdq[sc->cmdq_last].data, ptr, len); 112 sc->cmdq[sc->cmdq_last].func = func; 113 sc->cmdq_last = (sc->cmdq_last + 1) % RTWN_CMDQ_SIZE; 114 RTWN_CMDQ_UNLOCK(sc); 115 116 ieee80211_runtask(ic, &sc->cmdq_task); 117 118 return (0); 119 } 120