5a39e83c05
Some USB controllers can receive or send multiple data packets then generate one interrupt. This mechanism can reduce the number of data copies. Extend req buf to accommodate this. Signed-off-by: yangsong8 <yangsong8@xiaomi.com>
113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/****************************************************************************
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* drivers/usbdev/usbdev_req.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/usb/usbdev.h>
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#ifndef CONFIG_USBDEV_DMA
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# include <nuttx/kmalloc.h>
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#endif
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Allocate/free I/O requests.
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* Should not be called from interrupt processing!
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*/
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#define EP_ALLOCREQ(ep) (ep)->ops->allocreq(ep)
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#define EP_FREEREQ(ep,req) (ep)->ops->freereq(ep,req)
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/* Allocate/free an I/O buffer.
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* Should not be called from interrupt processing!
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*/
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#ifdef CONFIG_USBDEV_DMA
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# define EP_ALLOCBUFFER(ep,nb) (ep)->ops->allocbuffer(ep,nb)
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# define EP_FREEBUFFER(ep,buf) (ep)->ops->freebuffer(ep,buf)
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#else
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# if CONFIG_USBDEV_EPBUFFER_ALIGNMENT != 0
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# define EP_ALLOCBUFFER(ep,nb) kmm_memalign(CONFIG_USBDEV_EPBUFFER_ALIGNMENT, nb)
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# else
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# define EP_ALLOCBUFFER(ep,nb) kmm_malloc(nb)
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# endif
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# define EP_FREEBUFFER(ep,buf) kmm_free(buf)
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: usbdev_allocreq
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*
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* Description:
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* Allocate a request instance along with its buffer
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*
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****************************************************************************/
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FAR struct usbdev_req_s *usbdev_allocreq(FAR struct usbdev_ep_s *ep,
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size_t len)
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{
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FAR struct usbdev_req_s *req;
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req = EP_ALLOCREQ(ep);
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if (req != NULL)
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{
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req->len = len;
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req->buf = EP_ALLOCBUFFER(ep, len);
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req->flags = USBDEV_REQFLAGS_NULLPKT;
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if (req->buf == NULL)
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{
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EP_FREEREQ(ep, req);
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req = NULL;
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}
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}
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return req;
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}
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/****************************************************************************
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* Name: usbdev_freereq
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*
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* Description:
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* Free a request instance along with its buffer
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*
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****************************************************************************/
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void usbdev_freereq(FAR struct usbdev_ep_s *ep,
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FAR struct usbdev_req_s *req)
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{
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if (ep != NULL && req != NULL)
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{
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if (req->buf != NULL)
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{
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EP_FREEBUFFER(ep, req->buf);
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}
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EP_FREEREQ(ep, req);
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}
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}
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