linux/drivers/net/wireless/mediatek/mt76/usb_mcu.c
Lorenzo Bianconi d704d16f20 mt76: usb: do not use sg buffers for mcu messages
Do not use scatter-gather buffers for mcu commands.
Introduce mt76u_buf_alloc and mt76u_buf_alloc_sg routines.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2019-02-18 19:55:53 +01:00

58 lines
1.6 KiB
C

/*
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "mt76.h"
void mt76u_mcu_complete_urb(struct urb *urb)
{
struct completion *cmpl = urb->context;
complete(cmpl);
}
EXPORT_SYMBOL_GPL(mt76u_mcu_complete_urb);
int mt76u_mcu_init_rx(struct mt76_dev *dev)
{
struct mt76_usb *usb = &dev->usb;
int err;
err = mt76u_buf_alloc(dev, &usb->mcu.res, MCU_RESP_URB_SIZE,
MCU_RESP_URB_SIZE, GFP_KERNEL);
if (err < 0)
return err;
err = mt76u_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
&usb->mcu.res, GFP_KERNEL,
mt76u_mcu_complete_urb,
&usb->mcu.cmpl);
if (err < 0)
mt76u_buf_free(&usb->mcu.res);
return err;
}
EXPORT_SYMBOL_GPL(mt76u_mcu_init_rx);
void mt76u_mcu_deinit(struct mt76_dev *dev)
{
struct mt76u_buf *buf = &dev->usb.mcu.res;
if (buf->urb) {
usb_kill_urb(buf->urb);
mt76u_buf_free(buf);
}
}
EXPORT_SYMBOL_GPL(mt76u_mcu_deinit);