b03efcfb21
This is part of the grand scheme to eliminate the qlen member of skb_queue_head, and subsequently remove the 'list' member of sk_buff. Most users of skb_queue_len() want to know if the queue is empty or not, and that's trivially done with skb_queue_empty() which doesn't use the skb_queue_head->qlen member and instead uses the queue list emptyness as the test. Signed-off-by: David S. Miller <davem@davemloft.net>
299 lines
11 KiB
C
299 lines
11 KiB
C
/*********************************************************************
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*
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* Filename: irda_device.h
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* Version: 0.9
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* Description: Contains various declarations used by the drivers
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Tue Apr 14 12:41:42 1998
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* Modified at: Mon Mar 20 09:08:57 2000
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
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* Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>,
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* Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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/*
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* This header contains all the IrDA definitions a driver really
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* needs, and therefore the driver should not need to include
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* any other IrDA headers - Jean II
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*/
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#ifndef IRDA_DEVICE_H
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#define IRDA_DEVICE_H
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#include <linux/config.h>
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#include <linux/tty.h>
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <linux/skbuff.h> /* struct sk_buff */
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#include <linux/irda.h>
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#include <linux/types.h>
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#include <net/pkt_sched.h>
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#include <net/irda/irda.h>
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#include <net/irda/qos.h> /* struct qos_info */
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#include <net/irda/irqueue.h> /* irda_queue_t */
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/* A few forward declarations (to make compiler happy) */
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struct irlap_cb;
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/* Some non-standard interface flags (should not conflict with any in if.h) */
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#define IFF_SIR 0x0001 /* Supports SIR speeds */
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#define IFF_MIR 0x0002 /* Supports MIR speeds */
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#define IFF_FIR 0x0004 /* Supports FIR speeds */
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#define IFF_VFIR 0x0008 /* Supports VFIR speeds */
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#define IFF_PIO 0x0010 /* Supports PIO transfer of data */
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#define IFF_DMA 0x0020 /* Supports DMA transfer of data */
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#define IFF_SHM 0x0040 /* Supports shared memory data transfers */
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#define IFF_DONGLE 0x0080 /* Interface has a dongle attached */
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#define IFF_AIR 0x0100 /* Supports Advanced IR (AIR) standards */
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#define IO_XMIT 0x01
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#define IO_RECV 0x02
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typedef enum {
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IRDA_IRLAP, /* IrDA mode, and deliver to IrLAP */
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IRDA_RAW, /* IrDA mode */
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SHARP_ASK,
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TV_REMOTE, /* Also known as Consumer Electronics IR */
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} INFRARED_MODE;
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typedef enum {
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IRDA_TASK_INIT, /* All tasks are initialized with this state */
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IRDA_TASK_DONE, /* Signals that the task is finished */
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IRDA_TASK_WAIT,
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IRDA_TASK_WAIT1,
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IRDA_TASK_WAIT2,
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IRDA_TASK_WAIT3,
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IRDA_TASK_CHILD_INIT, /* Initializing child task */
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IRDA_TASK_CHILD_WAIT, /* Waiting for child task to finish */
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IRDA_TASK_CHILD_DONE /* Child task is finished */
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} IRDA_TASK_STATE;
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struct irda_task;
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typedef int (*IRDA_TASK_CALLBACK) (struct irda_task *task);
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struct irda_task {
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irda_queue_t q;
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magic_t magic;
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IRDA_TASK_STATE state;
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IRDA_TASK_CALLBACK function;
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IRDA_TASK_CALLBACK finished;
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struct irda_task *parent;
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struct timer_list timer;
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void *instance; /* Instance being called */
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void *param; /* Parameter to be used by instance */
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};
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/* Dongle info */
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struct dongle_reg;
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typedef struct {
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struct dongle_reg *issue; /* Registration info */
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struct net_device *dev; /* Device we are attached to */
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struct irda_task *speed_task; /* Task handling speed change */
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struct irda_task *reset_task; /* Task handling reset */
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__u32 speed; /* Current speed */
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/* Callbacks to the IrDA device driver */
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int (*set_mode)(struct net_device *, int mode);
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int (*read)(struct net_device *dev, __u8 *buf, int len);
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int (*write)(struct net_device *dev, __u8 *buf, int len);
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int (*set_dtr_rts)(struct net_device *dev, int dtr, int rts);
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} dongle_t;
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/* Dongle registration info */
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struct dongle_reg {
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irda_queue_t q; /* Must be first */
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IRDA_DONGLE type;
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void (*open)(dongle_t *dongle, struct qos_info *qos);
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void (*close)(dongle_t *dongle);
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int (*reset)(struct irda_task *task);
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int (*change_speed)(struct irda_task *task);
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struct module *owner;
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};
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/*
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* Per-packet information we need to hide inside sk_buff
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* (must not exceed 48 bytes, check with struct sk_buff)
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*/
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struct irda_skb_cb {
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magic_t magic; /* Be sure that we can trust the information */
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__u32 next_speed; /* The Speed to be set *after* this frame */
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__u16 mtt; /* Minimum turn around time */
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__u16 xbofs; /* Number of xbofs required, used by SIR mode */
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__u16 next_xbofs; /* Number of xbofs required *after* this frame */
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void *context; /* May be used by drivers */
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void (*destructor)(struct sk_buff *skb); /* Used for flow control */
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__u16 xbofs_delay; /* Number of xbofs used for generating the mtt */
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__u8 line; /* Used by IrCOMM in IrLPT mode */
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};
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/* Chip specific info */
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typedef struct {
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int cfg_base; /* Config register IO base */
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int sir_base; /* SIR IO base */
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int fir_base; /* FIR IO base */
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int mem_base; /* Shared memory base */
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int sir_ext; /* Length of SIR iobase */
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int fir_ext; /* Length of FIR iobase */
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int irq, irq2; /* Interrupts used */
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int dma, dma2; /* DMA channel(s) used */
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int fifo_size; /* FIFO size */
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int irqflags; /* interrupt flags (ie, SA_SHIRQ|SA_INTERRUPT) */
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int direction; /* Link direction, used by some FIR drivers */
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int enabled; /* Powered on? */
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int suspended; /* Suspended by APM */
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__u32 speed; /* Currently used speed */
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__u32 new_speed; /* Speed we must change to when Tx is finished */
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int dongle_id; /* Dongle or transceiver currently used */
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} chipio_t;
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/* IO buffer specific info (inspired by struct sk_buff) */
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typedef struct {
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int state; /* Receiving state (transmit state not used) */
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int in_frame; /* True if receiving frame */
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__u8 *head; /* start of buffer */
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__u8 *data; /* start of data in buffer */
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int len; /* current length of data */
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int truesize; /* total allocated size of buffer */
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__u16 fcs;
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struct sk_buff *skb; /* ZeroCopy Rx in async_unwrap_char() */
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} iobuff_t;
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/* Maximum SIR frame (skb) that we expect to receive *unwrapped*.
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* Max LAP MTU (I field) is 2048 bytes max (IrLAP 1.1, chapt 6.6.5, p40).
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* Max LAP header is 2 bytes (for now).
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* Max CRC is 2 bytes at SIR, 4 bytes at FIR.
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* Need 1 byte for skb_reserve() to align IP header for IrLAN.
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* Add a few extra bytes just to be safe (buffer is power of two anyway)
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* Jean II */
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#define IRDA_SKB_MAX_MTU 2064
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/* Maximum SIR frame that we expect to send, wrapped (i.e. with XBOFS
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* and escaped characters on top of above). */
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#define IRDA_SIR_MAX_FRAME 4269
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/* The SIR unwrapper async_unwrap_char() will use a Rx-copy-break mechanism
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* when using the optional ZeroCopy Rx, where only small frames are memcpy
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* to a smaller skb to save memory. This is the threshold under which copy
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* will happen (and over which it won't happen).
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* Some FIR drivers may use this #define as well...
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* This is the same value as various Ethernet drivers. - Jean II */
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#define IRDA_RX_COPY_THRESHOLD 256
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/* Function prototypes */
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int irda_device_init(void);
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void irda_device_cleanup(void);
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/* IrLAP entry points used by the drivers.
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* We declare them here to avoid the driver pulling a whole bunch stack
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* headers they don't really need - Jean II */
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struct irlap_cb *irlap_open(struct net_device *dev, struct qos_info *qos,
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const char *hw_name);
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void irlap_close(struct irlap_cb *self);
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/* Interface to be uses by IrLAP */
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void irda_device_set_media_busy(struct net_device *dev, int status);
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int irda_device_is_media_busy(struct net_device *dev);
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int irda_device_is_receiving(struct net_device *dev);
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/* Interface for internal use */
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static inline int irda_device_txqueue_empty(const struct net_device *dev)
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{
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return skb_queue_empty(&dev->qdisc->q);
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}
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int irda_device_set_raw_mode(struct net_device* self, int status);
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struct net_device *alloc_irdadev(int sizeof_priv);
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/* Dongle interface */
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void irda_device_unregister_dongle(struct dongle_reg *dongle);
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int irda_device_register_dongle(struct dongle_reg *dongle);
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dongle_t *irda_device_dongle_init(struct net_device *dev, int type);
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int irda_device_dongle_cleanup(dongle_t *dongle);
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void irda_setup_dma(int channel, dma_addr_t buffer, int count, int mode);
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void irda_task_delete(struct irda_task *task);
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struct irda_task *irda_task_execute(void *instance,
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IRDA_TASK_CALLBACK function,
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IRDA_TASK_CALLBACK finished,
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struct irda_task *parent, void *param);
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void irda_task_next_state(struct irda_task *task, IRDA_TASK_STATE state);
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/*
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* Function irda_get_mtt (skb)
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*
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* Utility function for getting the minimum turnaround time out of
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* the skb, where it has been hidden in the cb field.
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*/
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static inline __u16 irda_get_mtt(const struct sk_buff *skb)
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{
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const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
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return (cb->magic == LAP_MAGIC) ? cb->mtt : 10000;
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}
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/*
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* Function irda_get_next_speed (skb)
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*
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* Extract the speed that should be set *after* this frame from the skb
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*
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* Note : return -1 for user space frames
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*/
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static inline __u32 irda_get_next_speed(const struct sk_buff *skb)
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{
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const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
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return (cb->magic == LAP_MAGIC) ? cb->next_speed : -1;
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}
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/*
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* Function irda_get_next_xbofs (skb)
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*
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* Extract the xbofs that should be set for this frame from the skb
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*
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* Note : default to 10 for user space frames
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*/
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static inline __u16 irda_get_xbofs(const struct sk_buff *skb)
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{
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const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
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return (cb->magic == LAP_MAGIC) ? cb->xbofs : 10;
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}
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/*
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* Function irda_get_next_xbofs (skb)
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*
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* Extract the xbofs that should be set *after* this frame from the skb
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*
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* Note : return -1 for user space frames
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*/
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static inline __u16 irda_get_next_xbofs(const struct sk_buff *skb)
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{
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const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
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return (cb->magic == LAP_MAGIC) ? cb->next_xbofs : -1;
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}
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#endif /* IRDA_DEVICE_H */
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