mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/* $FreeBSD$ */
|
|
/*-
|
|
* Copyright (c) 2008 Hans Petter Selasky. 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, 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.
|
|
*/
|
|
|
|
#include <sys/stdint.h>
|
|
#include <sys/stddef.h>
|
|
#include <sys/param.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/types.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/module.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/condvar.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/callout.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/priv.h>
|
|
|
|
#include <dev/usb/usb.h>
|
|
#include <dev/usb/usbdi.h>
|
|
#include <dev/usb/usb_dev.h>
|
|
#include <dev/usb/usb_mbuf.h>
|
|
|
|
/*------------------------------------------------------------------------*
|
|
* usb_alloc_mbufs - allocate mbufs to an usbd interface queue
|
|
*
|
|
* Returns:
|
|
* A pointer that should be passed to "free()" when the buffer(s)
|
|
* should be released.
|
|
*------------------------------------------------------------------------*/
|
|
void *
|
|
usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq,
|
|
usb_size_t block_size, uint16_t nblocks)
|
|
{
|
|
struct usb_mbuf *m_ptr;
|
|
uint8_t *data_ptr;
|
|
void *free_ptr = NULL;
|
|
usb_size_t alloc_size;
|
|
|
|
/* align data */
|
|
block_size += ((-block_size) & (USB_HOST_ALIGN - 1));
|
|
|
|
if (nblocks && block_size) {
|
|
|
|
alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks;
|
|
|
|
free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO);
|
|
|
|
if (free_ptr == NULL) {
|
|
goto done;
|
|
}
|
|
m_ptr = free_ptr;
|
|
data_ptr = (void *)(m_ptr + nblocks);
|
|
|
|
while (nblocks--) {
|
|
|
|
m_ptr->cur_data_ptr =
|
|
m_ptr->min_data_ptr = data_ptr;
|
|
|
|
m_ptr->cur_data_len =
|
|
m_ptr->max_data_len = block_size;
|
|
|
|
USB_IF_ENQUEUE(ifq, m_ptr);
|
|
|
|
m_ptr++;
|
|
data_ptr += block_size;
|
|
}
|
|
}
|
|
done:
|
|
return (free_ptr);
|
|
}
|