5efea30f03
sleepable context for net80211 driver callbacks. This removes the need for USB and firmware based drivers to roll their own code to defer the chip programming for state changes, scan requests, channel changes and mcast/promisc updates. When a driver callback completes the hardware state is now guaranteed to have been updated and is in sync with net80211 layer. This nukes around 1300 lines of code from the wireless device drivers making them more readable and less race prone. The net80211 layer has been updated as follows - all state/channel changes are serialised on the taskqueue. - ieee80211_new_state() always queues and can now be called from any context - scanning runs from a single taskq function and executes to completion. driver callbacks are synchronous so the channel, phy mode and rx filters are guaranteed to be set in hardware before probe request frames are transmitted. Help and contributions from Sam Leffler. Reviewed by: sam
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2005
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* Damien Bergamini <damien.bergamini@free.fr>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#define RAL_TX_LIST_COUNT 8
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#define RAL_TX_MINFREE 2
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#define URAL_SCAN_START 1
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#define URAL_SCAN_END 2
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#define URAL_SET_CHANNEL 3
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struct ural_rx_radiotap_header {
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struct ieee80211_radiotap_header wr_ihdr;
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uint8_t wr_flags;
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uint8_t wr_rate;
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uint16_t wr_chan_freq;
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uint16_t wr_chan_flags;
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uint8_t wr_antenna;
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uint8_t wr_antsignal;
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};
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#define RAL_RX_RADIOTAP_PRESENT \
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((1 << IEEE80211_RADIOTAP_FLAGS) | \
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(1 << IEEE80211_RADIOTAP_RATE) | \
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(1 << IEEE80211_RADIOTAP_CHANNEL) | \
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(1 << IEEE80211_RADIOTAP_ANTENNA) | \
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(1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL))
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struct ural_tx_radiotap_header {
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struct ieee80211_radiotap_header wt_ihdr;
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uint8_t wt_flags;
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uint8_t wt_rate;
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uint16_t wt_chan_freq;
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uint16_t wt_chan_flags;
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uint8_t wt_antenna;
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};
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#define RAL_TX_RADIOTAP_PRESENT \
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((1 << IEEE80211_RADIOTAP_FLAGS) | \
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(1 << IEEE80211_RADIOTAP_RATE) | \
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(1 << IEEE80211_RADIOTAP_CHANNEL) | \
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(1 << IEEE80211_RADIOTAP_ANTENNA))
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struct ural_softc;
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struct ural_tx_data {
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STAILQ_ENTRY(ural_tx_data) next;
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struct ural_softc *sc;
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struct ural_tx_desc desc;
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struct mbuf *m;
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struct ieee80211_node *ni;
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int rate;
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};
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typedef STAILQ_HEAD(, ural_tx_data) ural_txdhead;
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struct ural_node {
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struct ieee80211_node ni;
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struct ieee80211_amrr_node amn;
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};
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#define URAL_NODE(ni) ((struct ural_node *)(ni))
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struct ural_vap {
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struct ieee80211vap vap;
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struct ieee80211_beacon_offsets bo;
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struct ieee80211_amrr amrr;
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struct usb2_callout amrr_ch;
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struct task amrr_task;
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int (*newstate)(struct ieee80211vap *,
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enum ieee80211_state, int);
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};
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#define URAL_VAP(vap) ((struct ural_vap *)(vap))
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enum {
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URAL_BULK_WR,
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URAL_BULK_RD,
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URAL_N_TRANSFER = 2,
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};
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struct ural_softc {
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struct ifnet *sc_ifp;
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device_t sc_dev;
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struct usb2_device *sc_udev;
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uint32_t asic_rev;
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uint8_t rf_rev;
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struct usb2_xfer *sc_xfer[URAL_N_TRANSFER];
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struct ural_tx_data tx_data[RAL_TX_LIST_COUNT];
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ural_txdhead tx_q;
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ural_txdhead tx_free;
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int tx_nfree;
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struct ural_rx_desc sc_rx_desc;
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struct mtx sc_mtx;
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uint16_t sta[11];
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uint32_t rf_regs[4];
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uint8_t txpow[14];
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uint8_t sc_bssid[6];
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struct {
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uint8_t val;
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uint8_t reg;
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} __packed bbp_prom[16];
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int led_mode;
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int hw_radio;
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int rx_ant;
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int tx_ant;
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int nb_ant;
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struct ural_rx_radiotap_header sc_rxtap;
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int sc_rxtap_len;
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struct ural_tx_radiotap_header sc_txtap;
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int sc_txtap_len;
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};
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#define RAL_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
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#define RAL_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
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#define RAL_LOCK_ASSERT(sc, t) mtx_assert(&(sc)->sc_mtx, t)
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