1 /* $FreeBSD$ */ 2 /*- 3 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 4 * 5 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifdef USB_GLOBAL_INCLUDE_FILE 30 #include USB_GLOBAL_INCLUDE_FILE 31 #else 32 #include <sys/stdint.h> 33 #include <sys/stddef.h> 34 #include <sys/param.h> 35 #include <sys/queue.h> 36 #include <sys/types.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/bus.h> 40 #include <sys/module.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 #include <sys/condvar.h> 44 #include <sys/sysctl.h> 45 #include <sys/sx.h> 46 #include <sys/unistd.h> 47 #include <sys/callout.h> 48 #include <sys/malloc.h> 49 #include <sys/priv.h> 50 51 #include <dev/usb/usb.h> 52 #include <dev/usb/usbdi.h> 53 #include <dev/usb/usb_dev.h> 54 #include <dev/usb/usb_mbuf.h> 55 #endif /* USB_GLOBAL_INCLUDE_FILE */ 56 57 /*------------------------------------------------------------------------* 58 * usb_alloc_mbufs - allocate mbufs to an usbd interface queue 59 * 60 * Returns: 61 * A pointer that should be passed to "free()" when the buffer(s) 62 * should be released. 63 *------------------------------------------------------------------------*/ 64 void * 65 usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq, 66 usb_size_t block_size, uint16_t nblocks) 67 { 68 struct usb_mbuf *m_ptr; 69 uint8_t *data_ptr; 70 void *free_ptr = NULL; 71 usb_size_t alloc_size; 72 73 /* align data */ 74 block_size += ((-block_size) & (USB_HOST_ALIGN - 1)); 75 76 if (nblocks && block_size) { 77 alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks; 78 79 free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO); 80 m_ptr = free_ptr; 81 data_ptr = (void *)(m_ptr + nblocks); 82 83 while (nblocks--) { 84 m_ptr->cur_data_ptr = 85 m_ptr->min_data_ptr = data_ptr; 86 87 m_ptr->cur_data_len = 88 m_ptr->max_data_len = block_size; 89 90 USB_IF_ENQUEUE(ifq, m_ptr); 91 92 m_ptr++; 93 data_ptr += block_size; 94 } 95 } 96 return (free_ptr); 97 } 98