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 #ifdef USB_GLOBAL_INCLUDE_FILE 28 #include USB_GLOBAL_INCLUDE_FILE 29 #else 30 #include <sys/stdint.h> 31 #include <sys/stddef.h> 32 #include <sys/param.h> 33 #include <sys/queue.h> 34 #include <sys/types.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/bus.h> 38 #include <sys/module.h> 39 #include <sys/lock.h> 40 #include <sys/mutex.h> 41 #include <sys/condvar.h> 42 #include <sys/sysctl.h> 43 #include <sys/sx.h> 44 #include <sys/unistd.h> 45 #include <sys/callout.h> 46 #include <sys/malloc.h> 47 #include <sys/priv.h> 48 49 #include <dev/usb/usb.h> 50 #include <dev/usb/usbdi.h> 51 #include <dev/usb/usb_dev.h> 52 #include <dev/usb/usb_mbuf.h> 53 #endif /* USB_GLOBAL_INCLUDE_FILE */ 54 55 /*------------------------------------------------------------------------* 56 * usb_alloc_mbufs - allocate mbufs to an usbd interface queue 57 * 58 * Returns: 59 * A pointer that should be passed to "free()" when the buffer(s) 60 * should be released. 61 *------------------------------------------------------------------------*/ 62 void * 63 usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq, 64 usb_size_t block_size, uint16_t nblocks) 65 { 66 struct usb_mbuf *m_ptr; 67 uint8_t *data_ptr; 68 void *free_ptr = NULL; 69 usb_size_t alloc_size; 70 71 /* align data */ 72 block_size += ((-block_size) & (USB_HOST_ALIGN - 1)); 73 74 if (nblocks && block_size) { 75 76 alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks; 77 78 free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO); 79 80 if (free_ptr == NULL) { 81 goto done; 82 } 83 m_ptr = free_ptr; 84 data_ptr = (void *)(m_ptr + nblocks); 85 86 while (nblocks--) { 87 88 m_ptr->cur_data_ptr = 89 m_ptr->min_data_ptr = data_ptr; 90 91 m_ptr->cur_data_len = 92 m_ptr->max_data_len = block_size; 93 94 USB_IF_ENQUEUE(ifq, m_ptr); 95 96 m_ptr++; 97 data_ptr += block_size; 98 } 99 } 100 done: 101 return (free_ptr); 102 } 103