1 /* $FreeBSD$ */ 2 /*- 3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <dev/usb/usb_core.h> 28 #include <dev/usb/usb_mbuf.h> 29 30 /*------------------------------------------------------------------------* 31 * usb2_alloc_mbufs - allocate mbufs to an usbd interface queue 32 * 33 * Returns: 34 * A pointer that should be passed to "free()" when the buffer(s) 35 * should be released. 36 *------------------------------------------------------------------------*/ 37 void * 38 usb2_alloc_mbufs(struct malloc_type *type, struct usb2_ifqueue *ifq, 39 uint32_t block_size, uint16_t nblocks) 40 { 41 struct usb2_mbuf *m_ptr; 42 uint8_t *data_ptr; 43 void *free_ptr = NULL; 44 uint32_t alloc_size; 45 46 /* align data */ 47 block_size += ((-block_size) & (USB_HOST_ALIGN - 1)); 48 49 if (nblocks && block_size) { 50 51 alloc_size = (block_size + sizeof(struct usb2_mbuf)) * nblocks; 52 53 free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO); 54 55 if (free_ptr == NULL) { 56 goto done; 57 } 58 m_ptr = free_ptr; 59 data_ptr = (void *)(m_ptr + nblocks); 60 61 while (nblocks--) { 62 63 m_ptr->cur_data_ptr = 64 m_ptr->min_data_ptr = data_ptr; 65 66 m_ptr->cur_data_len = 67 m_ptr->max_data_len = block_size; 68 69 USB_IF_ENQUEUE(ifq, m_ptr); 70 71 m_ptr++; 72 data_ptr += block_size; 73 } 74 } 75 done: 76 return (free_ptr); 77 } 78