e79bfcb795
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* u_f.h
|
|
*
|
|
* Utility definitions for USB functions
|
|
*
|
|
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
|
|
*/
|
|
|
|
#ifndef __U_F_H__
|
|
#define __U_F_H__
|
|
|
|
#include <linux/usb/gadget.h>
|
|
|
|
/* Variable Length Array Macros **********************************************/
|
|
#define vla_group(groupname) size_t groupname##__next = 0
|
|
#define vla_group_size(groupname) groupname##__next
|
|
|
|
#define vla_item(groupname, type, name, n) \
|
|
size_t groupname##_##name##__offset = ({ \
|
|
size_t align_mask = __alignof__(type) - 1; \
|
|
size_t offset = (groupname##__next + align_mask) & ~align_mask;\
|
|
size_t size = (n) * sizeof(type); \
|
|
groupname##__next = offset + size; \
|
|
offset; \
|
|
})
|
|
|
|
#define vla_item_with_sz(groupname, type, name, n) \
|
|
size_t groupname##_##name##__sz = (n) * sizeof(type); \
|
|
size_t groupname##_##name##__offset = ({ \
|
|
size_t align_mask = __alignof__(type) - 1; \
|
|
size_t offset = (groupname##__next + align_mask) & ~align_mask;\
|
|
size_t size = groupname##_##name##__sz; \
|
|
groupname##__next = offset + size; \
|
|
offset; \
|
|
})
|
|
|
|
#define vla_ptr(ptr, groupname, name) \
|
|
((void *) ((char *)ptr + groupname##_##name##__offset))
|
|
|
|
struct usb_ep;
|
|
struct usb_request;
|
|
|
|
/**
|
|
* alloc_ep_req - returns a usb_request allocated by the gadget driver and
|
|
* allocates the request's buffer.
|
|
*
|
|
* @ep: the endpoint to allocate a usb_request
|
|
* @len: usb_requests's buffer suggested size
|
|
*
|
|
* In case @ep direction is OUT, the @len will be aligned to ep's
|
|
* wMaxPacketSize. In order to avoid memory leaks or drops, *always* use
|
|
* usb_requests's length (req->length) to refer to the allocated buffer size.
|
|
* Requests allocated via alloc_ep_req() *must* be freed by free_ep_req().
|
|
*/
|
|
struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len);
|
|
|
|
/* Frees a usb_request previously allocated by alloc_ep_req() */
|
|
static inline void free_ep_req(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
kfree(req->buf);
|
|
usb_ep_free_request(ep, req);
|
|
}
|
|
|
|
#endif /* __U_F_H__ */
|