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/* $FreeBSD$ */
/*-
* 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);
}
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