drivers/usb/mon/usb_mon.h

   1 /*
   2  * The USB Monitor, inspired by Dave Harding's USBMon.
   3  *
   4  * Copyright (C) 2005 Pete Zaitcev (zaitcev@redhat.com)
   5  */
   6
   7 #ifndef __USB_MON_H
   8 #define __USB_MON_H
   9
  10 #include <linux/list.h>
  11 #include <linux/slab.h>
  12 #include <linux/kref.h>
  13 /* #include <linux/usb.h> */    /* We use struct pointers only in this header */
  14
  15 #define TAG "usbmon"
  16
  17 struct mon_bus {
  18         struct list_head bus_link;
  19         spinlock_t lock;
  20         struct usb_bus *u_bus;
  21
  22         int text_inited;
  23         struct dentry *dent_s;          /* Debugging file */
  24         struct dentry *dent_t;          /* Text interface file */
  25         struct dentry *dent_u;          /* Second text interface file */
  26
  27         /* Ref */
  28         int nreaders;                   /* Under mon_lock AND mbus->lock */
  29         struct list_head r_list;        /* Chain of readers (usually one) */
  30         struct kref ref;                /* Under mon_lock */
  31
  32         /* Stats */
  33         unsigned int cnt_events;
  34         unsigned int cnt_text_lost;
  35 };
  36
  37 /*
  38  * An instance of a process which opened a file (but can fork later)
  39  */
  40 struct mon_reader {
  41         struct list_head r_link;
  42         struct mon_bus *m_bus;
  43         void *r_data;           /* Use container_of instead? */
  44
  45         void (*rnf_submit)(void *data, struct urb *urb);
  46         void (*rnf_error)(void *data, struct urb *urb, int error);
  47         void (*rnf_complete)(void *data, struct urb *urb);
  48 };
  49
  50 void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
  51 void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
  52
  53 struct mon_bus *mon_bus_lookup(unsigned int num);
  54
  55 int /*bool*/ mon_text_add(struct mon_bus *mbus, int busnum);
  56 void mon_text_del(struct mon_bus *mbus);
  57 // void mon_bin_add(struct mon_bus *);
  58
  59 int __init mon_text_init(void);
  60 void mon_text_exit(void);
  61 int __init mon_bin_init(void);
  62 void mon_bin_exit(void);
  63
  64 /*
  65  * DMA interface.
  66  *
  67  * XXX The vectored side needs a serious re-thinking. Abstracting vectors,
  68  * like in Paolo's original patch, produces a double pkmap. We need an idea.
  69 */
  70 extern char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len);
  71
  72 struct mon_reader_bin;
  73 extern void mon_dmapeek_vec(const struct mon_reader_bin *rp,
  74     unsigned int offset, dma_addr_t dma_addr, unsigned int len);
  75 extern unsigned int mon_copy_to_buff(const struct mon_reader_bin *rp,
  76     unsigned int offset, const unsigned char *from, unsigned int len);
  77
  78 /*
  79  */
  80 extern struct mutex mon_lock;
  81
  82 extern const struct file_operations mon_fops_stat;
  83
  84 extern struct mon_bus mon_bus0;         /* Only for redundant checks */
  85
  86 #endif /* __USB_MON_H */