cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pci_mcu.c (2843B)

      1// SPDX-License-Identifier: ISC
      2/* Copyright (C) 2021 MediaTek Inc. */
      3
      4#include "mt7921.h"
      5#include "mcu.h"
      6
      7int mt7921e_driver_own(struct mt7921_dev *dev)
      8{
      9	u32 reg = mt7921_reg_map_l1(dev, MT_TOP_LPCR_HOST_BAND0);
     10
     11	mt76_wr(dev, reg, MT_TOP_LPCR_HOST_DRV_OWN);
     12	if (!mt76_poll_msec(dev, reg, MT_TOP_LPCR_HOST_FW_OWN,
     13			    0, 500)) {
     14		dev_err(dev->mt76.dev, "Timeout for driver own\n");
     15		return -EIO;
     16	}
     17
     18	return 0;
     19}
     20
     21static int
     22mt7921_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
     23			int cmd, int *seq)
     24{
     25	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
     26	enum mt76_mcuq_id txq = MT_MCUQ_WM;
     27	int ret;
     28
     29	ret = mt7921_mcu_fill_message(mdev, skb, cmd, seq);
     30	if (ret)
     31		return ret;
     32
     33	if (cmd == MCU_CMD(FW_SCATTER))
     34		txq = MT_MCUQ_FWDL;
     35
     36	return mt76_tx_queue_skb_raw(dev, mdev->q_mcu[txq], skb, 0);
     37}
     38
     39int mt7921e_mcu_init(struct mt7921_dev *dev)
     40{
     41	static const struct mt76_mcu_ops mt7921_mcu_ops = {
     42		.headroom = sizeof(struct mt7921_mcu_txd),
     43		.mcu_skb_send_msg = mt7921_mcu_send_message,
     44		.mcu_parse_response = mt7921_mcu_parse_response,
     45		.mcu_restart = mt76_connac_mcu_restart,
     46	};
     47	int err;
     48
     49	dev->mt76.mcu_ops = &mt7921_mcu_ops;
     50
     51	err = mt7921e_driver_own(dev);
     52	if (err)
     53		return err;
     54
     55	err = mt7921_run_firmware(dev);
     56
     57	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_FWDL], false);
     58
     59	return err;
     60}
     61
     62int __mt7921e_mcu_drv_pmctrl(struct mt7921_dev *dev)
     63{
     64	int i, err = 0;
     65
     66	for (i = 0; i < MT7921_DRV_OWN_RETRY_COUNT; i++) {
     67		mt76_wr(dev, MT_CONN_ON_LPCTL, PCIE_LPCR_HOST_CLR_OWN);
     68		if (mt76_poll_msec(dev, MT_CONN_ON_LPCTL,
     69				   PCIE_LPCR_HOST_OWN_SYNC, 0, 50))
     70			break;
     71	}
     72
     73	if (i == MT7921_DRV_OWN_RETRY_COUNT) {
     74		dev_err(dev->mt76.dev, "driver own failed\n");
     75		err = -EIO;
     76	}
     77
     78	return err;
     79}
     80
     81int mt7921e_mcu_drv_pmctrl(struct mt7921_dev *dev)
     82{
     83	struct mt76_phy *mphy = &dev->mt76.phy;
     84	struct mt76_connac_pm *pm = &dev->pm;
     85	int err;
     86
     87	err = __mt7921e_mcu_drv_pmctrl(dev);
     88	if (err < 0)
     89		goto out;
     90
     91	mt7921_wpdma_reinit_cond(dev);
     92	clear_bit(MT76_STATE_PM, &mphy->state);
     93
     94	pm->stats.last_wake_event = jiffies;
     95	pm->stats.doze_time += pm->stats.last_wake_event -
     96			       pm->stats.last_doze_event;
     97out:
     98	return err;
     99}
    100
    101int mt7921e_mcu_fw_pmctrl(struct mt7921_dev *dev)
    102{
    103	struct mt76_phy *mphy = &dev->mt76.phy;
    104	struct mt76_connac_pm *pm = &dev->pm;
    105	int i, err = 0;
    106
    107	for (i = 0; i < MT7921_DRV_OWN_RETRY_COUNT; i++) {
    108		mt76_wr(dev, MT_CONN_ON_LPCTL, PCIE_LPCR_HOST_SET_OWN);
    109		if (mt76_poll_msec(dev, MT_CONN_ON_LPCTL,
    110				   PCIE_LPCR_HOST_OWN_SYNC, 4, 50))
    111			break;
    112	}
    113
    114	if (i == MT7921_DRV_OWN_RETRY_COUNT) {
    115		dev_err(dev->mt76.dev, "firmware own failed\n");
    116		clear_bit(MT76_STATE_PM, &mphy->state);
    117		err = -EIO;
    118	}
    119
    120	pm->stats.last_doze_event = jiffies;
    121	pm->stats.awake_time += pm->stats.last_doze_event -
    122				pm->stats.last_wake_event;
    123
    124	return err;
    125}