| developer | b11a539 | 2022-03-31 00:34:47 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: ISC |
| 2 | /* |
| 3 | * Copyright (C) 2019 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> |
| 4 | */ |
| 5 | |
| 6 | #include "mt76.h" |
| 7 | |
| 8 | struct sk_buff * |
| 9 | mt76_mcu_msg_alloc(struct mt76_dev *dev, const void *data, |
| 10 | int data_len) |
| 11 | { |
| 12 | const struct mt76_mcu_ops *ops = dev->mcu_ops; |
| 13 | int length = ops->headroom + data_len + ops->tailroom; |
| 14 | struct sk_buff *skb; |
| 15 | |
| 16 | skb = alloc_skb(length, GFP_KERNEL); |
| 17 | if (!skb) |
| 18 | return NULL; |
| 19 | |
| 20 | memset(skb->head, 0, length); |
| 21 | skb_reserve(skb, ops->headroom); |
| 22 | |
| 23 | if (data && data_len) |
| 24 | skb_put_data(skb, data, data_len); |
| 25 | |
| 26 | return skb; |
| 27 | } |
| 28 | EXPORT_SYMBOL_GPL(mt76_mcu_msg_alloc); |
| 29 | |
| 30 | struct sk_buff *mt76_mcu_get_response(struct mt76_dev *dev, |
| 31 | unsigned long expires) |
| 32 | { |
| 33 | unsigned long timeout; |
| 34 | |
| 35 | if (!time_is_after_jiffies(expires)) |
| 36 | return NULL; |
| 37 | |
| 38 | timeout = expires - jiffies; |
| 39 | wait_event_timeout(dev->mcu.wait, |
| 40 | (!skb_queue_empty(&dev->mcu.res_q) || |
| 41 | test_bit(MT76_MCU_RESET, &dev->phy.state)), |
| 42 | timeout); |
| 43 | return skb_dequeue(&dev->mcu.res_q); |
| 44 | } |
| 45 | EXPORT_SYMBOL_GPL(mt76_mcu_get_response); |
| 46 | |
| 47 | void mt76_mcu_rx_event(struct mt76_dev *dev, struct sk_buff *skb) |
| 48 | { |
| 49 | skb_queue_tail(&dev->mcu.res_q, skb); |
| 50 | wake_up(&dev->mcu.wait); |
| 51 | } |
| 52 | EXPORT_SYMBOL_GPL(mt76_mcu_rx_event); |
| 53 | |
| 54 | int mt76_mcu_send_and_get_msg(struct mt76_dev *dev, int cmd, const void *data, |
| 55 | int len, bool wait_resp, struct sk_buff **ret_skb) |
| 56 | { |
| 57 | struct sk_buff *skb; |
| 58 | |
| 59 | if (dev->mcu_ops->mcu_send_msg) |
| 60 | return dev->mcu_ops->mcu_send_msg(dev, cmd, data, len, wait_resp); |
| 61 | |
| 62 | skb = mt76_mcu_msg_alloc(dev, data, len); |
| 63 | if (!skb) |
| 64 | return -ENOMEM; |
| 65 | |
| 66 | return mt76_mcu_skb_send_and_get_msg(dev, skb, cmd, wait_resp, ret_skb); |
| 67 | } |
| 68 | EXPORT_SYMBOL_GPL(mt76_mcu_send_and_get_msg); |
| 69 | |
| 70 | int mt76_mcu_skb_send_and_get_msg(struct mt76_dev *dev, struct sk_buff *skb, |
| 71 | int cmd, bool wait_resp, |
| 72 | struct sk_buff **ret_skb) |
| 73 | { |
| 74 | unsigned long expires; |
| 75 | int ret, seq; |
| 76 | |
| 77 | if (ret_skb) |
| 78 | *ret_skb = NULL; |
| 79 | |
| 80 | mutex_lock(&dev->mcu.mutex); |
| 81 | |
| 82 | ret = dev->mcu_ops->mcu_skb_send_msg(dev, skb, cmd, &seq); |
| 83 | if (ret < 0) |
| 84 | goto out; |
| 85 | |
| 86 | if (!wait_resp) { |
| 87 | ret = 0; |
| 88 | goto out; |
| 89 | } |
| 90 | |
| 91 | expires = jiffies + dev->mcu.timeout; |
| 92 | |
| 93 | do { |
| 94 | skb = mt76_mcu_get_response(dev, expires); |
| 95 | ret = dev->mcu_ops->mcu_parse_response(dev, cmd, skb, seq); |
| 96 | if (!ret && ret_skb) |
| 97 | *ret_skb = skb; |
| 98 | else |
| 99 | dev_kfree_skb(skb); |
| 100 | } while (ret == -EAGAIN); |
| 101 | |
| 102 | out: |
| 103 | mutex_unlock(&dev->mcu.mutex); |
| 104 | |
| 105 | return ret; |
| 106 | } |
| 107 | EXPORT_SYMBOL_GPL(mt76_mcu_skb_send_and_get_msg); |
| 108 | |
| 109 | int __mt76_mcu_send_firmware(struct mt76_dev *dev, int cmd, const void *data, |
| 110 | int len, int max_len) |
| 111 | { |
| 112 | int err, cur_len; |
| 113 | |
| 114 | while (len > 0) { |
| 115 | cur_len = min_t(int, max_len, len); |
| 116 | |
| 117 | err = mt76_mcu_send_msg(dev, cmd, data, cur_len, false); |
| 118 | if (err) |
| 119 | return err; |
| 120 | |
| 121 | data += cur_len; |
| 122 | len -= cur_len; |
| 123 | |
| 124 | if (dev->queue_ops->tx_cleanup) |
| 125 | dev->queue_ops->tx_cleanup(dev, |
| 126 | dev->q_mcu[MT_MCUQ_FWDL], |
| 127 | false); |
| 128 | } |
| 129 | |
| 130 | return 0; |
| 131 | } |
| 132 | EXPORT_SYMBOL_GPL(__mt76_mcu_send_firmware); |