| // SPDX-License-Identifier: ISC |
| /* |
| * Copyright (C) 2019 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> |
| */ |
| |
| #include "mt76.h" |
| |
| struct sk_buff * |
| mt76_mcu_msg_alloc(struct mt76_dev *dev, const void *data, |
| int data_len) |
| { |
| const struct mt76_mcu_ops *ops = dev->mcu_ops; |
| int length = ops->headroom + data_len + ops->tailroom; |
| struct sk_buff *skb; |
| |
| skb = alloc_skb(length, GFP_KERNEL); |
| if (!skb) |
| return NULL; |
| |
| memset(skb->head, 0, length); |
| skb_reserve(skb, ops->headroom); |
| |
| if (data && data_len) |
| skb_put_data(skb, data, data_len); |
| |
| return skb; |
| } |
| EXPORT_SYMBOL_GPL(mt76_mcu_msg_alloc); |
| |
| struct sk_buff *mt76_mcu_get_response(struct mt76_dev *dev, |
| unsigned long expires) |
| { |
| unsigned long timeout; |
| |
| if (!time_is_after_jiffies(expires)) |
| return NULL; |
| |
| timeout = expires - jiffies; |
| wait_event_timeout(dev->mcu.wait, |
| (!skb_queue_empty(&dev->mcu.res_q) || |
| test_bit(MT76_MCU_RESET, &dev->phy.state)), |
| timeout); |
| return skb_dequeue(&dev->mcu.res_q); |
| } |
| EXPORT_SYMBOL_GPL(mt76_mcu_get_response); |
| |
| void mt76_mcu_rx_event(struct mt76_dev *dev, struct sk_buff *skb) |
| { |
| skb_queue_tail(&dev->mcu.res_q, skb); |
| wake_up(&dev->mcu.wait); |
| } |
| EXPORT_SYMBOL_GPL(mt76_mcu_rx_event); |
| |
| int mt76_mcu_send_and_get_msg(struct mt76_dev *dev, int cmd, const void *data, |
| int len, bool wait_resp, struct sk_buff **ret_skb) |
| { |
| struct sk_buff *skb; |
| |
| if (dev->mcu_ops->mcu_send_msg) |
| return dev->mcu_ops->mcu_send_msg(dev, cmd, data, len, wait_resp); |
| |
| skb = mt76_mcu_msg_alloc(dev, data, len); |
| if (!skb) |
| return -ENOMEM; |
| |
| return mt76_mcu_skb_send_and_get_msg(dev, skb, cmd, wait_resp, ret_skb); |
| } |
| EXPORT_SYMBOL_GPL(mt76_mcu_send_and_get_msg); |
| |
| int mt76_mcu_skb_send_and_get_msg(struct mt76_dev *dev, struct sk_buff *skb, |
| int cmd, bool wait_resp, |
| struct sk_buff **ret_skb) |
| { |
| unsigned long expires; |
| int ret, seq; |
| |
| if (ret_skb) |
| *ret_skb = NULL; |
| |
| mutex_lock(&dev->mcu.mutex); |
| |
| ret = dev->mcu_ops->mcu_skb_send_msg(dev, skb, cmd, &seq); |
| if (ret < 0) |
| goto out; |
| |
| if (!wait_resp) { |
| ret = 0; |
| goto out; |
| } |
| |
| expires = jiffies + dev->mcu.timeout; |
| |
| do { |
| skb = mt76_mcu_get_response(dev, expires); |
| ret = dev->mcu_ops->mcu_parse_response(dev, cmd, skb, seq); |
| if (!ret && ret_skb) |
| *ret_skb = skb; |
| else |
| dev_kfree_skb(skb); |
| } while (ret == -EAGAIN); |
| |
| out: |
| mutex_unlock(&dev->mcu.mutex); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(mt76_mcu_skb_send_and_get_msg); |
| |
| int __mt76_mcu_send_firmware(struct mt76_dev *dev, int cmd, const void *data, |
| int len, int max_len) |
| { |
| int err, cur_len; |
| |
| while (len > 0) { |
| cur_len = min_t(int, max_len, len); |
| |
| err = mt76_mcu_send_msg(dev, cmd, data, cur_len, false); |
| if (err) |
| return err; |
| |
| data += cur_len; |
| len -= cur_len; |
| |
| if (dev->queue_ops->tx_cleanup) |
| dev->queue_ops->tx_cleanup(dev, |
| dev->q_mcu[MT_MCUQ_FWDL], |
| false); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(__mt76_mcu_send_firmware); |