path: root/sys/dev/iwi/if_iwivar.h

/*	$FreeBSD$	*/

/*-
 * Copyright (c) 2004, 2005
 *      Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

struct iwi_rx_radiotap_header {
	struct ieee80211_radiotap_header wr_ihdr;
	uint8_t		wr_flags;
	uint8_t		wr_rate;
	uint16_t	wr_chan_freq;
	uint16_t	wr_chan_flags;
	uint8_t		wr_antsignal;
	uint8_t		wr_antenna;
};

#define IWI_RX_RADIOTAP_PRESENT						\
	((1 << IEEE80211_RADIOTAP_FLAGS) |				\
	 (1 << IEEE80211_RADIOTAP_RATE) |				\
	 (1 << IEEE80211_RADIOTAP_CHANNEL) |				\
	 (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL) |			\
	 (1 << IEEE80211_RADIOTAP_ANTENNA))

struct iwi_tx_radiotap_header {
	struct ieee80211_radiotap_header wt_ihdr;
	uint8_t		wt_flags;
	uint16_t	wt_chan_freq;
	uint16_t	wt_chan_flags;
};

#define IWI_TX_RADIOTAP_PRESENT						\
	((1 << IEEE80211_RADIOTAP_FLAGS) |				\
	 (1 << IEEE80211_RADIOTAP_CHANNEL))

struct iwi_cmd_ring {
	bus_dma_tag_t		desc_dmat;
	bus_dmamap_t		desc_map;
	bus_addr_t		physaddr;
	struct iwi_cmd_desc	*desc;
	int			count;
	int			queued;
	int			cur;
	int			next;
};

struct iwi_tx_data {
	bus_dmamap_t		map;
	struct mbuf		*m;
	struct ieee80211_node	*ni;
};

struct iwi_tx_ring {
	bus_dma_tag_t		desc_dmat;
	bus_dma_tag_t		data_dmat;
	bus_dmamap_t		desc_map;
	bus_addr_t		physaddr;
	bus_addr_t		csr_ridx;
	bus_addr_t		csr_widx;
	struct iwi_tx_desc	*desc;
	struct iwi_tx_data	*data;
	int			count;
	int			queued;
	int			cur;
	int			next;
};

struct iwi_rx_data {
	bus_dmamap_t	map;
	bus_addr_t	physaddr;
	uint32_t	reg;
	struct mbuf	*m;
};

struct iwi_rx_ring {
	bus_dma_tag_t		data_dmat;
	struct iwi_rx_data	*data;
	int			count;
	int			cur;
};

struct iwi_node {
	struct ieee80211_node	in_node;
	int			in_station;
#define IWI_MAX_IBSSNODE	32
};

struct iwi_fw {
	const struct firmware	*fp;		/* image handle */
	const char		*data;		/* firmware image data */
	size_t			size;		/* firmware image size */
	const char		*name;		/* associated image name */
};

struct iwi_softc {
	struct ifnet		*sc_ifp;
	struct ieee80211com	sc_ic;
	int			(*sc_newstate)(struct ieee80211com *,
				    enum ieee80211_state, int);
	void			(*sc_node_free)(struct ieee80211_node *);
	device_t		sc_dev;

	struct mtx		sc_mtx;
	struct mtx		sc_cmdlock;
	char			sc_cmdname[12];	/* e.g. "iwi0_cmd" */
	uint8_t			sc_mcast[IEEE80211_ADDR_LEN];
	struct unrhdr		*sc_unr;
	struct taskqueue	*sc_tq;		/* private task queue */
	struct taskqueue	*sc_tq2;	/* reset task queue */
#if __FreeBSD_version < 700000
	struct proc		*sc_tqproc;
#endif

	uint32_t		flags;
#define IWI_FLAG_FW_INITED	(1 << 0)
#define	IWI_FLAG_BUSY		(1 << 3)	/* busy sending a command */
#define	IWI_FLAG_ASSOCIATED	(1 << 4)	/* currently associated  */
#define IWI_FLAG_CHANNEL_SCAN	(1 << 5)
	uint32_t		fw_state;
#define IWI_FW_IDLE		0
#define IWI_FW_LOADING		1
#define IWI_FW_ASSOCIATING	2
#define IWI_FW_DISASSOCIATING	3
#define IWI_FW_SCANNING		4
	struct iwi_cmd_ring	cmdq;
	struct iwi_tx_ring	txq[WME_NUM_AC];
	struct iwi_rx_ring	rxq;

	struct resource		*irq;
	struct resource		*mem;
	bus_space_tag_t		sc_st;
	bus_space_handle_t	sc_sh;
	void 			*sc_ih;
	int			mem_rid;
	int			irq_rid;

	/*
	 * The card needs external firmware images to work, which is made of a
	 * bootloader, microcode and firmware proper. In version 3.00 and
	 * above, all pieces are contained in a single image, preceded by a
	 * struct iwi_firmware_hdr indicating the size of the 3 pieces.
	 * Old firmware < 3.0 has separate boot and ucode, so we need to
	 * load all of them explicitly.
	 * To avoid issues related to fragmentation, we keep the block of
	 * dma-ble memory around until detach time, and reallocate it when
	 * it becomes too small. fw_dma_size is the size currently allocated.
	 */
	int			fw_dma_size;
	uint32_t		fw_flags;	/* allocation status */
#define	IWI_FW_HAVE_DMAT	0x01
#define	IWI_FW_HAVE_MAP		0x02
#define	IWI_FW_HAVE_PHY		0x04
	bus_dma_tag_t		fw_dmat;
	bus_dmamap_t		fw_map;
	bus_addr_t		fw_physaddr;
	void			*fw_virtaddr;
	enum ieee80211_opmode	fw_mode;	/* mode of current firmware */
	struct iwi_fw		fw_boot;	/* boot firmware */
	struct iwi_fw		fw_uc;		/* microcode */
	struct iwi_fw		fw_fw;		/* operating mode support */

	int			curchan;	/* current h/w channel # */
	int			antenna;
	int			bluetooth;
	struct iwi_associate	assoc;
	struct iwi_wme_params	wme[3];
	u_int			sc_scangen;

	struct task		sc_radiontask;	/* radio on processing */
	struct task		sc_radiofftask;	/* radio off processing */
	struct task		sc_scanaborttask;	/* cancel active scan */
	struct task		sc_restarttask;	/* restart adapter processing */
	struct task		sc_opstask;	/* scan / auth processing */

	unsigned int		sc_softled : 1,	/* enable LED gpio status */
				sc_ledstate: 1,	/* LED on/off state */
				sc_blinking: 1;	/* LED blink operation active */
	u_int			sc_nictype;	/* NIC type from EEPROM */
	u_int			sc_ledpin;	/* mask for activity LED */
	u_int			sc_ledidle;	/* idle polling interval */
	int			sc_ledevent;	/* time of last LED event */
	u_int8_t		sc_rxrate;	/* current rx rate for LED */
	u_int8_t		sc_rxrix;
	u_int8_t		sc_txrate;	/* current tx rate for LED */
	u_int8_t		sc_txrix;
	u_int16_t		sc_ledoff;	/* off time for current blink */
	struct callout		sc_ledtimer;	/* led off timer */
	struct callout		sc_wdtimer;	/* watchdog timer */

	int			sc_tx_timer;
	int			sc_rfkill_timer;/* poll for rfkill change */
	int			sc_state_timer;	/* firmware state timer */
	int			sc_busy_timer;	/* firmware cmd timer */

#define IWI_SCAN_START		(1 << 0)
#define IWI_SET_CHANNEL	        (1 << 1)
#define	IWI_SCAN_END		(1 << 2)
#define	IWI_ASSOC		(1 << 3)
#define	IWI_DISASSOC		(1 << 4)
#define	IWI_SCAN_CURCHAN	(1 << 5)
#define	IWI_SCAN_ALLCHAN	(1 << 6)
#define	IWI_SET_WME		(1 << 7)
#define	IWI_CMD_MAXOPS		10
	int                     sc_cmd[IWI_CMD_MAXOPS];
	int                     sc_cmd_cur;    /* current queued scan task */
	int                     sc_cmd_next;   /* last queued scan task */
	unsigned long		sc_maxdwell;	/* max dwell time for curchan */
	struct bpf_if		*sc_drvbpf;

	union {
		struct iwi_rx_radiotap_header th;
		uint8_t	pad[64];
	}			sc_rxtapu;
#define sc_rxtap	sc_rxtapu.th
	int			sc_rxtap_len;

	union {
		struct iwi_tx_radiotap_header th;
		uint8_t	pad[64];
	}			sc_txtapu;
#define sc_txtap	sc_txtapu.th
	int			sc_txtap_len;
};

#define	IWI_STATE_BEGIN(_sc, _state)	do {			\
	KASSERT(_sc->fw_state == IWI_FW_IDLE,			\
	    ("iwi firmware not idle"));				\
	_sc->fw_state = _state;					\
	_sc->sc_state_timer = 5;				\
	DPRINTF(("enter FW state %d\n",	_state));		\
} while (0)

#define	IWI_STATE_END(_sc, _state)	do {			\
	if (_sc->fw_state == _state)				\
		DPRINTF(("exit FW state %d\n", _state));	\
	 else							\
		DPRINTF(("expected FW state %d, got %d\n",	\
			    _state, _sc->fw_state));		\
	_sc->fw_state = IWI_FW_IDLE;				\
	wakeup(_sc);						\
	_sc->sc_state_timer = 0;				\
} while (0)
/*
 * NB.: This models the only instance of async locking in iwi_init_locked
 *	and must be kept in sync.
 */
#define	IWI_LOCK_INIT(sc) \
	mtx_init(&(sc)->sc_mtx, device_get_nameunit((sc)->sc_dev), \
	    MTX_NETWORK_LOCK, MTX_DEF)
#define	IWI_LOCK_DESTROY(sc)	mtx_destroy(&(sc)->sc_mtx)
#define	IWI_LOCK_DECL	int	__waslocked = 0
#define IWI_LOCK_ASSERT(sc)	mtx_assert(&(sc)->sc_mtx, MA_OWNED)
#define IWI_LOCK(sc)	do {				\
	if (!(__waslocked = mtx_owned(&(sc)->sc_mtx)))	\
		mtx_lock(&(sc)->sc_mtx);		\
} while (0)
#define IWI_UNLOCK(sc)	do {			\
	if (!__waslocked)			\
		mtx_unlock(&(sc)->sc_mtx);	\
} while (0)
#define	IWI_CMD_LOCK_INIT(sc) do { \
	snprintf((sc)->sc_cmdname, sizeof((sc)->sc_cmdname), "%s_cmd", \
		device_get_nameunit((sc)->sc_dev)); \
	mtx_init(&(sc)->sc_cmdlock, (sc)->sc_cmdname, NULL, MTX_DEF); \
} while (0)
#define	IWI_CMD_LOCK_DESTROY(sc)	mtx_destroy(&(sc)->sc_cmdlock)
#define	IWI_CMD_LOCK(sc)		mtx_lock(&(sc)->sc_cmdlock)
#define	IWI_CMD_UNLOCK(sc)		mtx_unlock(&(sc)->sc_cmdlock)