usb_mbuf.h File Reference

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Go to the source code of this file.

Data Structures
struct	usb_mbuf

Macros
#define	USB_IF_ENQUEUE(ifq, m)
#define	USB_IF_DEQUEUE(ifq, m)
#define	USB_IF_PREPEND(ifq, m)
#define	USB_IF_QFULL(ifq)   ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
#define	USB_IF_QLEN(ifq)   ((ifq)->ifq_len)
#define	USB_IF_POLL(ifq, m)   ((m) = (ifq)->ifq_head)
#define	USB_MBUF_RESET(m)

Functions
void *	usb_alloc_mbufs (struct malloc_type *type, struct usb_ifqueue *ifq, usb_size_t block_size, uint16_t nblocks)

Macro Definition Documentation

USB_IF_DEQUEUE

#define USB_IF_DEQUEUE	(		ifq,
			m
	)

Value:

    do {                                \
    (m) = (ifq)->ifq_head;                                      \
    if (m) {                                                    \
        if (((ifq)->ifq_head = (m)->usb_nextpkt) == NULL) {     \
             (ifq)->ifq_tail = NULL;                            \
        }                                                       \
        (m)->usb_nextpkt = NULL;                                \
        (ifq)->ifq_len--;                                       \
    }                                                           \
  } while (0)

Definition at line 58 of file usb_mbuf.h.

USB_IF_ENQUEUE

#define USB_IF_ENQUEUE	(		ifq,
			m
	)

Value:

    do {                \
    (m)->usb_nextpkt = NULL;                    \
    if ((ifq)->ifq_tail == NULL)                \
        (ifq)->ifq_head = (m);                  \
    else                                        \
        (ifq)->ifq_tail->usb_nextpkt = (m);     \
    (ifq)->ifq_tail = (m);                      \
    (ifq)->ifq_len++;                           \
  } while (0)

Definition at line 48 of file usb_mbuf.h.

USB_IF_POLL

#define USB_IF_POLL	(		ifq,
			m
	)		((m) = (ifq)->ifq_head)

Definition at line 80 of file usb_mbuf.h.

USB_IF_PREPEND

#define USB_IF_PREPEND	(		ifq,
			m
	)

Value:

      do {              \
      (m)->usb_nextpkt = (ifq)->ifq_head;       \
      if ((ifq)->ifq_tail == NULL) {            \
          (ifq)->ifq_tail = (m);                \
      }                                         \
      (ifq)->ifq_head = (m);                    \
      (ifq)->ifq_len++;                         \
  } while (0)

Definition at line 69 of file usb_mbuf.h.

USB_IF_QFULL

#define USB_IF_QFULL

(

ifq

)

((ifq)->ifq_len >= (ifq)->ifq_maxlen)

Definition at line 78 of file usb_mbuf.h.

USB_IF_QLEN

#define USB_IF_QLEN

(

ifq

)

((ifq)->ifq_len)

Definition at line 79 of file usb_mbuf.h.

USB_MBUF_RESET

#define USB_MBUF_RESET

(

m

)

Value:

    do {                        \
    (m)->cur_data_ptr = (m)->min_data_ptr;      \
    (m)->cur_data_len = (m)->max_data_len;      \
    (m)->last_packet = 0;                       \
  } while (0)

Definition at line 82 of file usb_mbuf.h.

Function Documentation

usb_alloc_mbufs()

void * usb_alloc_mbufs	(	struct malloc_type *	type,
		struct usb_ifqueue *	ifq,
		usb_size_t	block_size,
		uint16_t	nblocks
	)

Definition at line 65 of file usb_mbuf.c.

References usb_mbuf::cur_data_len, usb_mbuf::cur_data_ptr, usb_mbuf::max_data_len, usb_mbuf::min_data_ptr, type, USB_HOST_ALIGN, and USB_IF_ENQUEUE.