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linux-pinenote/drivers/media/pci/ttpci/av7110.h
Nikolaus Schulz 30ad64b8ac [media] dvb: push down ioctl lock in dvb_usercopy 
Since most dvb ioctls wrap their real work with dvb_usercopy, the static mutex
used in dvb_usercopy effectively is a global lock for dvb ioctls.
Unfortunately, frontend ioctls can be blocked by the frontend thread for
several seconds; this leads to unacceptable lock contention.  Mitigate that by
pushing the mutex from dvb_usercopy down to the individual, device specific
ioctls.
There are 10 such ioctl functions using dvb_usercopy, either calling it
directly, or via the trivial wrapper dvb_generic_ioctl. The following already
employ their own locking and look safe:
    • dvb_demux_ioctl           (as per dvb_demux_do_ioctl)
    • dvb_dvr_ioctl             (as per dvb_dvr_do_ioctl)
    • dvb_osd_ioctl             (as per single non-trivial callee)
    • fdtv_ca_ioctl             (as per callees)
    • dvb_frontend_ioctl
The following functions do not, and are thus changed to use a device specific
mutex:
    • dvb_net_ioctl             (as per dvb_net_do_ioctl)
    • dvb_ca_en50221_io_ioctl   (as per dvb_ca_en50221_io_do_ioctl)
    • dvb_video_ioctl
    • dvb_audio_ioctl
    • dvb_ca_ioctl

Signed-off-by: Nikolaus Schulz <schulz@macnetix.de>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-12-27 15:44:21 -02:00

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#ifndef _AV7110_H_
#define _AV7110_H_
#include <linux/interrupt.h>
#include <linux/socket.h>
#include <linux/netdevice.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/time.h>
#include <linux/dvb/video.h>
#include <linux/dvb/audio.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/ca.h>
#include <linux/dvb/osd.h>
#include <linux/dvb/net.h>
#include <linux/mutex.h>
#include "dvbdev.h"
#include "demux.h"
#include "dvb_demux.h"
#include "dmxdev.h"
#include "dvb_filter.h"
#include "dvb_net.h"
#include "dvb_ringbuffer.h"
#include "dvb_frontend.h"
#include "ves1820.h"
#include "ves1x93.h"
#include "stv0299.h"
#include "tda8083.h"
#include "sp8870.h"
#include "stv0297.h"
#include "l64781.h"
#include <media/saa7146_vv.h>
#define ANALOG_TUNER_VES1820 1
#define ANALOG_TUNER_STV0297 2
extern int av7110_debug;
#define dprintk(level,args...) \
do { if ((av7110_debug & level)) { printk("dvb-ttpci: %s(): ", __func__); printk(args); } } while (0)
#define MAXFILT 32
enum {AV_PES_STREAM, PS_STREAM, TS_STREAM, PES_STREAM};
enum av7110_video_mode {
AV7110_VIDEO_MODE_PAL = 0,
AV7110_VIDEO_MODE_NTSC = 1
};
struct av7110_p2t {
u8 pes[TS_SIZE];
u8 counter;
long int pos;
int frags;
struct dvb_demux_feed *feed;
};
/* video MPEG decoder events: */
/* (code copied from dvb_frontend.c, should maybe be factored out...) */
#define MAX_VIDEO_EVENT 8
struct dvb_video_events {
struct video_event events[MAX_VIDEO_EVENT];
int eventw;
int eventr;
int overflow;
wait_queue_head_t wait_queue;
spinlock_t lock;
};
struct av7110;
/* infrared remote control */
struct infrared {
u16 key_map[256];
struct input_dev *input_dev;
char input_phys[32];
struct timer_list keyup_timer;
struct tasklet_struct ir_tasklet;
void (*ir_handler)(struct av7110 *av7110, u32 ircom);
u32 ir_command;
u32 ir_config;
u32 device_mask;
u8 protocol;
u8 inversion;
u16 last_key;
u16 last_toggle;
u8 delay_timer_finished;
};
/* place to store all the necessary device information */
struct av7110 {
/* devices */
struct dvb_device dvb_dev;
struct dvb_net dvb_net;
struct video_device *v4l_dev;
struct video_device *vbi_dev;
struct saa7146_dev *dev;
struct i2c_adapter i2c_adap;
char *card_name;
/* support for analog module of dvb-c */
int analog_tuner_flags;
int current_input;
u32 current_freq;
struct tasklet_struct debi_tasklet;
struct tasklet_struct gpio_tasklet;
int adac_type; /* audio DAC type */
#define DVB_ADAC_TI 0
#define DVB_ADAC_CRYSTAL 1
#define DVB_ADAC_MSP34x0 2
#define DVB_ADAC_MSP34x5 3
#define DVB_ADAC_NONE -1
/* buffers */
void *iobuf; /* memory for all buffers */
struct dvb_ringbuffer avout; /* buffer for video or A/V mux */
#define AVOUTLEN (128*1024)
struct dvb_ringbuffer aout; /* buffer for audio */
#define AOUTLEN (64*1024)
void *bmpbuf;
#define BMPLEN (8*32768+1024)
/* bitmap buffers and states */
int bmpp;
int bmplen;
volatile int bmp_state;
#define BMP_NONE 0
#define BMP_LOADING 1
#define BMP_LOADED 2
wait_queue_head_t bmpq;
/* DEBI and polled command interface */
spinlock_t debilock;
struct mutex dcomlock;
volatile int debitype;
volatile int debilen;
/* Recording and playback flags */
int rec_mode;
int playing;
#define RP_NONE 0
#define RP_VIDEO 1
#define RP_AUDIO 2
#define RP_AV 3
/* OSD */
int osdwin; /* currently active window */
u16 osdbpp[8];
struct mutex osd_mutex;
/* CA */
ca_slot_info_t ci_slot[2];
enum av7110_video_mode vidmode;
struct dmxdev dmxdev;
struct dvb_demux demux;
struct dmx_frontend hw_frontend;
struct dmx_frontend mem_frontend;
/* for budget mode demux1 */
struct dmxdev dmxdev1;
struct dvb_demux demux1;
struct dvb_net dvb_net1;
spinlock_t feedlock1;
int feeding1;
u32 ttbp;
unsigned char *grabbing;
struct saa7146_pgtable pt;
struct tasklet_struct vpe_tasklet;
bool full_ts;
int fe_synced;
struct mutex pid_mutex;
int video_blank;
struct video_status videostate;
u16 display_panscan;
int display_ar;
int trickmode;
#define TRICK_NONE 0
#define TRICK_FAST 1
#define TRICK_SLOW 2
#define TRICK_FREEZE 3
struct audio_status audiostate;
struct dvb_demux_filter *handle2filter[32];
struct av7110_p2t p2t_filter[MAXFILT];
struct dvb_filter_pes2ts p2t[2];
struct ipack ipack[2];
u8 *kbuf[2];
int sinfo;
int feeding;
int arm_errors;
int registered;
/* AV711X */
u32 arm_fw;
u32 arm_rtsl;
u32 arm_vid;
u32 arm_app;
u32 avtype;
int arm_ready;
struct task_struct *arm_thread;
wait_queue_head_t arm_wait;
u16 arm_loops;
void *debi_virt;
dma_addr_t debi_bus;
u16 pids[DMX_PES_OTHER];
struct dvb_ringbuffer ci_rbuffer;
struct dvb_ringbuffer ci_wbuffer;
struct audio_mixer mixer;
struct dvb_adapter dvb_adapter;
struct dvb_device *video_dev;
struct dvb_device *audio_dev;
struct dvb_device *ca_dev;
struct dvb_device *osd_dev;
struct dvb_video_events video_events;
video_size_t video_size;
u16 wssMode;
u16 wssData;
struct infrared ir;
/* firmware stuff */
unsigned char *bin_fw;
unsigned long size_fw;
unsigned char *bin_dpram;
unsigned long size_dpram;
unsigned char *bin_root;
unsigned long size_root;
struct dvb_frontend* fe;
fe_status_t fe_status;
struct mutex ioctl_mutex;
/* crash recovery */
void (*recover)(struct av7110* av7110);
fe_sec_voltage_t saved_voltage;
fe_sec_tone_mode_t saved_tone;
struct dvb_diseqc_master_cmd saved_master_cmd;
fe_sec_mini_cmd_t saved_minicmd;
int (*fe_init)(struct dvb_frontend* fe);
int (*fe_read_status)(struct dvb_frontend* fe, fe_status_t* status);
int (*fe_diseqc_reset_overload)(struct dvb_frontend* fe);
int (*fe_diseqc_send_master_cmd)(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd);
int (*fe_diseqc_send_burst)(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd);
int (*fe_set_tone)(struct dvb_frontend* fe, fe_sec_tone_mode_t tone);
int (*fe_set_voltage)(struct dvb_frontend* fe, fe_sec_voltage_t voltage);
int (*fe_dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd);
int (*fe_set_frontend)(struct dvb_frontend *fe);
};
extern int ChangePIDs(struct av7110 *av7110, u16 vpid, u16 apid, u16 ttpid,
u16 subpid, u16 pcrpid);
extern int av7110_check_ir_config(struct av7110 *av7110, int force);
extern int av7110_ir_init(struct av7110 *av7110);
extern void av7110_ir_exit(struct av7110 *av7110);
/* msp3400 i2c subaddresses */
#define MSP_WR_DEM 0x10
#define MSP_RD_DEM 0x11
#define MSP_WR_DSP 0x12
#define MSP_RD_DSP 0x13
extern int i2c_writereg(struct av7110 *av7110, u8 id, u8 reg, u8 val);
extern u8 i2c_readreg(struct av7110 *av7110, u8 id, u8 reg);
extern int msp_writereg(struct av7110 *av7110, u8 dev, u16 reg, u16 val);
extern int av7110_init_analog_module(struct av7110 *av7110);
extern int av7110_init_v4l(struct av7110 *av7110);
extern int av7110_exit_v4l(struct av7110 *av7110);
#endif /* _AV7110_H_ */
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