c5047d5b83
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200225011709.GA601@embeddedor
108 lines
1.9 KiB
C
108 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LBS_IF_USB_H
|
|
#define _LBS_IF_USB_H
|
|
|
|
#include <linux/wait.h>
|
|
#include <linux/timer.h>
|
|
|
|
struct lbs_private;
|
|
|
|
/*
|
|
* This file contains definition for USB interface.
|
|
*/
|
|
#define CMD_TYPE_REQUEST 0xF00DFACE
|
|
#define CMD_TYPE_DATA 0xBEADC0DE
|
|
#define CMD_TYPE_INDICATION 0xBEEFFACE
|
|
|
|
#define IPFIELD_ALIGN_OFFSET 2
|
|
|
|
#define BOOT_CMD_FW_BY_USB 0x01
|
|
#define BOOT_CMD_FW_IN_EEPROM 0x02
|
|
#define BOOT_CMD_UPDATE_BOOT2 0x03
|
|
#define BOOT_CMD_UPDATE_FW 0x04
|
|
#define BOOT_CMD_MAGIC_NUMBER 0x4C56524D /* LVRM */
|
|
|
|
struct bootcmd
|
|
{
|
|
__le32 magic;
|
|
uint8_t cmd;
|
|
uint8_t pad[11];
|
|
};
|
|
|
|
#define BOOT_CMD_RESP_OK 0x0001
|
|
#define BOOT_CMD_RESP_FAIL 0x0000
|
|
#define BOOT_CMD_RESP_NOT_SUPPORTED 0x0002
|
|
|
|
struct bootcmdresp
|
|
{
|
|
__le32 magic;
|
|
uint8_t cmd;
|
|
uint8_t result;
|
|
uint8_t pad[2];
|
|
};
|
|
|
|
/* USB card description structure*/
|
|
struct if_usb_card {
|
|
struct usb_device *udev;
|
|
uint32_t model; /* MODEL_* */
|
|
struct urb *rx_urb, *tx_urb;
|
|
struct lbs_private *priv;
|
|
|
|
struct sk_buff *rx_skb;
|
|
|
|
uint8_t ep_in;
|
|
uint8_t ep_out;
|
|
|
|
/* bootcmdresp == 0 means command is pending
|
|
* bootcmdresp < 0 means error
|
|
* bootcmdresp > 0 is a BOOT_CMD_RESP_* from firmware
|
|
*/
|
|
int8_t bootcmdresp;
|
|
|
|
int ep_in_size;
|
|
|
|
void *ep_out_buf;
|
|
int ep_out_size;
|
|
|
|
const struct firmware *fw;
|
|
struct timer_list fw_timeout;
|
|
wait_queue_head_t fw_wq;
|
|
uint32_t fwseqnum;
|
|
uint32_t totalbytes;
|
|
uint32_t fwlastblksent;
|
|
uint8_t CRC_OK;
|
|
uint8_t fwdnldover;
|
|
uint8_t fwfinalblk;
|
|
uint8_t surprise_removed;
|
|
|
|
__le16 boot2_version;
|
|
};
|
|
|
|
/* fwheader */
|
|
struct fwheader {
|
|
__le32 dnldcmd;
|
|
__le32 baseaddr;
|
|
__le32 datalength;
|
|
__le32 CRC;
|
|
};
|
|
|
|
#define FW_MAX_DATA_BLK_SIZE 600
|
|
/* FWData */
|
|
struct fwdata {
|
|
struct fwheader hdr;
|
|
__le32 seqnum;
|
|
uint8_t data[];
|
|
};
|
|
|
|
/* fwsyncheader */
|
|
struct fwsyncheader {
|
|
__le32 cmd;
|
|
__le32 seqnum;
|
|
};
|
|
|
|
#define FW_HAS_DATA_TO_RECV 0x00000001
|
|
#define FW_HAS_LAST_BLOCK 0x00000004
|
|
|
|
|
|
#endif
|