// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2020  Realtek Corporation
 */

#include <linux/pci.h>

#include "mac.h"
#include "pci.h"
#include "reg.h"
#include "ser.h"

static bool rtw89_pci_disable_clkreq;
static bool rtw89_pci_disable_aspm_l1;
static bool rtw89_pci_disable_l1ss;
module_param_named(disable_clkreq, rtw89_pci_disable_clkreq, bool, 0644);
module_param_named(disable_aspm_l1, rtw89_pci_disable_aspm_l1, bool, 0644);
module_param_named(disable_aspm_l1ss, rtw89_pci_disable_l1ss, bool, 0644);
MODULE_PARM_DESC(disable_clkreq, "Set Y to disable PCI clkreq support");
MODULE_PARM_DESC(disable_aspm_l1, "Set Y to disable PCI ASPM L1 support");
MODULE_PARM_DESC(disable_aspm_l1ss, "Set Y to disable PCI L1SS support");

static int rtw89_pci_rst_bdram_pcie(struct rtw89_dev *rtwdev)
{
        u32 val;
        int ret;

        rtw89_write32(rtwdev, R_AX_PCIE_INIT_CFG1,
                      rtw89_read32(rtwdev, R_AX_PCIE_INIT_CFG1) | B_AX_RST_BDRAM);

        ret = read_poll_timeout_atomic(rtw89_read32, val, !(val & B_AX_RST_BDRAM),
                                       1, RTW89_PCI_POLL_BDRAM_RST_CNT, false,
                                       rtwdev, R_AX_PCIE_INIT_CFG1);

        if (ret)
                return -EBUSY;

        return 0;
}

static u32 rtw89_pci_dma_recalc(struct rtw89_dev *rtwdev,
                                struct rtw89_pci_dma_ring *bd_ring,
                                u32 cur_idx, bool tx)
{
        u32 cnt, cur_rp, wp, rp, len;

        rp = bd_ring->rp;
        wp = bd_ring->wp;
        len = bd_ring->len;

        cur_rp = FIELD_GET(TXBD_HW_IDX_MASK, cur_idx);
        if (tx)
                cnt = cur_rp >= rp ? cur_rp - rp : len - (rp - cur_rp);
        else
                cnt = cur_rp >= wp ? cur_rp - wp : len - (wp - cur_rp);

        bd_ring->rp = cur_rp;

        return cnt;
}

static u32 rtw89_pci_txbd_recalc(struct rtw89_dev *rtwdev,
                                 struct rtw89_pci_tx_ring *tx_ring)
{
        struct rtw89_pci_dma_ring *bd_ring = &tx_ring->bd_ring;
        u32 addr_idx = bd_ring->addr_idx;
        u32 cnt, idx;

        idx = rtw89_read32(rtwdev, addr_idx);
        cnt = rtw89_pci_dma_recalc(rtwdev, bd_ring, idx, true);

        return cnt;
}

static void rtw89_pci_release_fwcmd(struct rtw89_dev *rtwdev,
                                    struct rtw89_pci *rtwpci,
                                    u32 cnt, bool release_all)
{
        struct rtw89_pci_tx_data *tx_data;
        struct sk_buff *skb;
        u32 qlen;

        while (cnt--) {
                skb = skb_dequeue(&rtwpci->h2c_queue);
                if (!skb) {
                        rtw89_err(rtwdev, "failed to pre-release fwcmd\n");
                        return;
                }
                skb_queue_tail(&rtwpci->h2c_release_queue, skb);
        }

        qlen = skb_queue_len(&rtwpci->h2c_release_queue);
        if (!release_all)
               qlen = qlen > RTW89_PCI_MULTITAG ? qlen - RTW89_PCI_MULTITAG : 0;

        while (qlen--) {
                skb = skb_dequeue(&rtwpci->h2c_release_queue);
                if (!skb) {
                        rtw89_err(rtwdev, "failed to release fwcmd\n");
                        return;
                }
                tx_data = RTW89_PCI_TX_SKB_CB(skb);
                dma_unmap_single(&rtwpci->pdev->dev, tx_data->dma, skb->len,
                                 DMA_TO_DEVICE);
                dev_kfree_skb_any(skb);
        }
}

static void rtw89_pci_reclaim_tx_fwcmd(struct rtw89_dev *rtwdev,
                                       struct rtw89_pci *rtwpci)
{
        struct rtw89_pci_tx_ring *tx_ring = &rtwpci->tx_rings[RTW89_TXCH_CH12];
        u32 cnt;

        cnt = rtw89_pci_txbd_recalc(rtwdev, tx_ring);
        if (!cnt)
                return;
        rtw89_pci_release_fwcmd(rtwdev, rtwpci, cnt, false);
}

static u32 rtw89_pci_rxbd_recalc(struct rtw89_dev *rtwdev,
                                 struct rtw89_pci_rx_ring *rx_ring)
{
        struct rtw89_pci_dma_ring *bd_ring = &rx_ring->bd_ring;
        u32 addr_idx = bd_ring->addr_idx;
        u32 cnt, idx;

        idx = rtw89_read32(rtwdev, addr_idx);
        cnt = rtw89_pci_dma_recalc(rtwdev, bd_ring, idx, false);

        return cnt;
}

static void rtw89_pci_sync_skb_for_cpu(struct rtw89_dev *rtwdev,
                                       struct sk_buff *skb)
{
        struct rtw89_pci_rx_info *rx_info;
        dma_addr_t dma;

        rx_info = RTW89_PCI_RX_SKB_CB(skb);
        dma = rx_info->dma;
        dma_sync_single_for_cpu(rtwdev->dev, dma, RTW89_PCI_RX_BUF_SIZE,
                                DMA_FROM_DEVICE);
}

static void rtw89_pci_sync_skb_for_device(struct rtw89_dev *rtwdev,
                                          struct sk_buff *skb)
{
        struct rtw89_pci_rx_info *rx_info;
        dma_addr_t dma;

        rx_info = RTW89_PCI_RX_SKB_CB(skb);
        dma = rx_info->dma;
        dma_sync_single_for_device(rtwdev->dev, dma, RTW89_PCI_RX_BUF_SIZE,
                                   DMA_FROM_DEVICE);
}

static int rtw89_pci_rxbd_info_update(struct rtw89_dev *rtwdev,
                                      struct sk_buff *skb)
{
        struct rtw89_pci_rxbd_info *rxbd_info;
        struct rtw89_pci_rx_info *rx_info = RTW89_PCI_RX_SKB_CB(skb);

        rxbd_info = (struct rtw89_pci_rxbd_info *)skb->data;
        rx_info->fs = le32_get_bits(rxbd_info->dword, RTW89_PCI_RXBD_FS);
        rx_info->ls = le32_get_bits(rxbd_info->dword, RTW89_PCI_RXBD_LS);
        rx_info->len = le32_get_bits(rxbd_info->dword, RTW89_PCI_RXBD_WRITE_SIZE);
        rx_info->tag = le32_get_bits(rxbd_info->dword, RTW89_PCI_RXBD_TAG);

        return 0;
}

static bool
rtw89_skb_put_rx_data(struct rtw89_dev *rtwdev, bool fs, bool ls,
                      struct sk_buff *new,
                      const struct sk_buff *skb, u32 offset,
                      const struct rtw89_pci_rx_info *rx_info,
                      const struct rtw89_rx_desc_info *desc_info)
{
        u32 copy_len = rx_info->len - offset;

        if (unlikely(skb_tailroom(new) < copy_len)) {
                rtw89_debug(rtwdev, RTW89_DBG_TXRX,
                            "invalid rx data length bd_len=%d desc_len=%d offset=%d (fs=%d ls=%d)\n",
                            rx_info->len, desc_info->pkt_size, offset, fs, ls);
                rtw89_hex_dump(rtwdev, RTW89_DBG_TXRX, "rx_data: ",
                               skb->data, rx_info->len);
                /* length of a single segment skb is desc_info->pkt_size */
                if (fs && ls) {
                        copy_len = desc_info->pkt_size;
                } else {
                        rtw89_info(rtwdev, "drop rx data due to invalid length\n");
                        return false;
                }
        }

        skb_put_data(new, skb->data + offset, copy_len);

        return true;
}

static u32 rtw89_pci_rxbd_deliver_skbs(struct rtw89_dev *rtwdev,
                                       struct rtw89_pci_rx_ring *rx_ring)
{
        struct rtw89_pci_dma_ring *bd_ring = &rx_ring->bd_ring;
        struct rtw89_pci_rx_info *rx_info;
        struct rtw89_rx_desc_info *desc_info = &rx_ring->diliver_desc;
        struct sk_buff *new = rx_ring->diliver_skb;
        struct sk_buff *skb;
        u32 rxinfo_size = sizeof(struct rtw89_pci_rxbd_info);
        u32 offset;
        u32 cnt = 1;
        bool fs, ls;
        int ret;

        skb = rx_ring->buf[bd_ring->wp];
        rtw89_pci_sync_skb_for_cpu(rtwdev, skb);

        ret = rtw89_pci_rxbd_info_update(rtwdev, skb);
        if (ret) {
                rtw89_err(rtwdev, "failed to update %d RXBD info: %d\n",
                          bd_ring->wp, ret);
                goto err_sync_device;
        }

        rx_info = RTW89_PCI_RX_SKB_CB(skb);
        fs = rx_info->fs;
        ls = rx_info->ls;

        if (fs) {
                if (new) {
                        rtw89_err(rtwdev, "skb should not be ready before first segment start\n");
                        goto err_sync_device;
                }
                if (desc_info->ready) {
                        rtw89_warn(rtwdev, "desc info should not be ready before first segment start\n");
                        goto err_sync_device;
                }

                rtw89_core_query_rxdesc(rtwdev, desc_info, skb->data, rxinfo_size);

                new = dev_alloc_skb(desc_info->pkt_size);
                if (!new)
                        goto err_sync_device;

                rx_ring->diliver_skb = new;

                /* first segment has RX desc */
                offset = desc_info->offset;
                offset += desc_info->long_rxdesc ? sizeof(struct rtw89_rxdesc_long) :
                          sizeof(struct rtw89_rxdesc_short);
        } else {
                offset = sizeof(struct rtw89_pci_rxbd_info);
                if (!new) {
                        rtw89_warn(rtwdev, "no last skb\n");
                        goto err_sync_device;
                }
        }
        if (!rtw89_skb_put_rx_data(rtwdev, fs, ls, new, skb, offset, rx_info, desc_info))
                goto err_sync_device;
        rtw89_pci_sync_skb_for_device(rtwdev, skb);
        rtw89_pci_rxbd_increase(rx_ring, 1);

        if (!desc_info->ready) {
                rtw89_warn(rtwdev, "no rx desc information\n");
                goto err_free_resource;
        }
        if (ls) {
                rtw89_core_rx(rtwdev, desc_info, new);
                rx_ring->diliver_skb = NULL;
                desc_info->ready = false;
        }

        return cnt;

err_sync_device:
        rtw89_pci_sync_skb_for_device(rtwdev, skb);
        rtw89_pci_rxbd_increase(rx_ring, 1);
err_free_resource:
        if (new)
                dev_kfree_skb_any(new);
        rx_ring->diliver_skb = NULL;
        desc_info->ready = false;

        return cnt;
}

static void rtw89_pci_rxbd_deliver(struct rtw89_dev *rtwdev,
                                   struct rtw89_pci_rx_ring *rx_ring,
                                   u32 cnt)
{
        struct rtw89_pci_dma_ring *bd_ring = &rx_ring->bd_ring;
        u32 rx_cnt;

        while (cnt && rtwdev->napi_budget_countdown > 0) {
                rx_cnt = rtw89_pci_rxbd_deliver_skbs(rtwdev, rx_ring);
                if (!rx_cnt) {
                        rtw89_err(rtwdev, "failed to deliver RXBD skb\n");

                        /* skip the rest RXBD bufs */
                        rtw89_pci_rxbd_increase(rx_ring, cnt);
                        break;
                }

                cnt -= rx_cnt;
        }

        rtw89_write16(rtwdev, bd_ring->addr_idx, bd_ring->wp);
}

static int rtw89_pci_poll_rxq_dma(struct rtw89_dev *rtwdev,
                                  struct rtw89_pci *rtwpci, int budget)
{
        struct rtw89_pci_rx_ring *rx_ring;
        int countdown = rtwdev->napi_budget_countdown;
        u32 cnt;

        rx_ring = &rtwpci->rx_rings[RTW89_RXCH_RXQ];

        cnt = rtw89_pci_rxbd_recalc(rtwdev, rx_ring);
        if (!cnt)
                return 0;

        cnt = min_t(u32, budget, cnt);

        rtw89_pci_rxbd_deliver(rtwdev, rx_ring, cnt);

        /* In case of flushing pending SKBs, the countdown may exceed. */
        if (rtwdev->napi_budget_countdown <= 0)
                return budget;

        return budget - countdown;
}

static void rtw89_pci_tx_status(struct rtw89_dev *rtwdev,
                                struct rtw89_pci_tx_ring *tx_ring,
                                struct sk_buff *skb, u8 tx_status)
{
        struct ieee80211_tx_info *info;

        info = IEEE80211_SKB_CB(skb);
        ieee80211_tx_info_clear_status(info);

        if (info->flags & IEEE80211_TX_CTL_NO_ACK)
                info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
        if (tx_status == RTW89_TX_DONE) {
                info->flags |= IEEE80211_TX_STAT_ACK;
                tx_ring->tx_acked++;
        } else {
                if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
                        rtw89_debug(rtwdev, RTW89_DBG_FW,
                                    "failed to TX of status %x\n", tx_status);
                switch (tx_status) {
                case RTW89_TX_RETRY_LIMIT:
                        tx_ring->tx_retry_lmt++;
                        break;
                case RTW89_TX_LIFE_TIME:
                        tx_ring->tx_life_time++;
                        break;
                case RTW89_TX_MACID_DROP:
                        tx_ring->tx_mac_id_drop++;
                        break;
                default:
                        rtw89_warn(rtwdev, "invalid TX status %x\n", tx_status);
                        break;
                }
        }

        ieee80211_tx_status_ni(rtwdev->hw, skb);
}

static void rtw89_pci_reclaim_txbd(struct rtw89_dev *rtwdev, struct rtw89_pci_tx_ring *tx_ring)
{
        struct rtw89_pci_tx_wd *txwd;
        u32 cnt;

        cnt = rtw89_pci_txbd_recalc(rtwdev, tx_ring);
        while (cnt--) {
                txwd = list_first_entry_or_null(&tx_ring->busy_pages, struct rtw89_pci_tx_wd, list);
                if (!txwd) {
                        rtw89_warn(rtwdev, "No busy txwd pages available\n");
                        break;
                }

                list_del_init(&txwd->list);
        }
}

static void rtw89_pci_release_busy_txwd(struct rtw89_dev *rtwdev,
                                        struct rtw89_pci_tx_ring *tx_ring)
{
        struct rtw89_pci_tx_wd_ring *wd_ring = &tx_ring->wd_ring;
        struct rtw89_pci_tx_wd *txwd;
        int i;

        for (i = 0; i < wd_ring->page_num; i++) {
                txwd = list_first_entry_or_null(&tx_ring->busy_pages, struct rtw89_pci_tx_wd, list);
                if (!txwd)
                        break;

                list_del_init(&txwd->list);
        }
}

static void rtw89_pci_release_txwd_skb(struct rtw89_dev *rtwdev,
                                       struct rtw89_pci_tx_ring *tx_ring,
                                       struct rtw89_pci_tx_wd *txwd, u16 seq,
                                       u8 tx_status)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_data *tx_data;
        struct sk_buff *skb, *tmp;
        u8 txch = tx_ring->txch;

        if (!list_empty(&txwd->list)) {
                rtw89_warn(rtwdev, "queue %d txwd %d is not idle\n",
                           txch, seq);
                return;
        }

        /* currently, support for only one frame */
        if (skb_queue_len(&txwd->queue) != 1) {
                rtw89_warn(rtwdev, "empty pending queue %d page %d\n",
                           txch, seq);
                return;
        }

        skb_queue_walk_safe(&txwd->queue, skb, tmp) {
                skb_unlink(skb, &txwd->queue);

                tx_data = RTW89_PCI_TX_SKB_CB(skb);
                dma_unmap_single(&rtwpci->pdev->dev, tx_data->dma, skb->len,
                                 DMA_TO_DEVICE);

                rtw89_pci_tx_status(rtwdev, tx_ring, skb, tx_status);
        }

        rtw89_pci_enqueue_txwd(tx_ring, txwd);
}

static void rtw89_pci_release_rpp(struct rtw89_dev *rtwdev,
                                  struct rtw89_pci_rpp_fmt *rpp)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring;
        struct rtw89_pci_tx_wd_ring *wd_ring;
        struct rtw89_pci_tx_wd *txwd;
        u16 seq;
        u8 qsel, tx_status, txch;

        seq = le32_get_bits(rpp->dword, RTW89_PCI_RPP_SEQ);
        qsel = le32_get_bits(rpp->dword, RTW89_PCI_RPP_QSEL);
        tx_status = le32_get_bits(rpp->dword, RTW89_PCI_RPP_TX_STATUS);
        txch = rtw89_core_get_ch_dma(rtwdev, qsel);

        if (txch == RTW89_TXCH_CH12) {
                rtw89_warn(rtwdev, "should no fwcmd release report\n");
                return;
        }

        tx_ring = &rtwpci->tx_rings[txch];
        rtw89_pci_reclaim_txbd(rtwdev, tx_ring);
        wd_ring = &tx_ring->wd_ring;
        txwd = &wd_ring->pages[seq];

        rtw89_pci_release_txwd_skb(rtwdev, tx_ring, txwd, seq, tx_status);
}

static void rtw89_pci_release_pending_txwd_skb(struct rtw89_dev *rtwdev,
                                               struct rtw89_pci_tx_ring *tx_ring)
{
        struct rtw89_pci_tx_wd_ring *wd_ring = &tx_ring->wd_ring;
        struct rtw89_pci_tx_wd *txwd;
        int i;

        for (i = 0; i < wd_ring->page_num; i++) {
                txwd = &wd_ring->pages[i];

                if (!list_empty(&txwd->list))
                        continue;

                rtw89_pci_release_txwd_skb(rtwdev, tx_ring, txwd, i, RTW89_TX_MACID_DROP);
        }
}

static u32 rtw89_pci_release_tx_skbs(struct rtw89_dev *rtwdev,
                                     struct rtw89_pci_rx_ring *rx_ring,
                                     u32 max_cnt)
{
        struct rtw89_pci_dma_ring *bd_ring = &rx_ring->bd_ring;
        struct rtw89_pci_rx_info *rx_info;
        struct rtw89_pci_rpp_fmt *rpp;
        struct rtw89_rx_desc_info desc_info = {};
        struct sk_buff *skb;
        u32 cnt = 0;
        u32 rpp_size = sizeof(struct rtw89_pci_rpp_fmt);
        u32 rxinfo_size = sizeof(struct rtw89_pci_rxbd_info);
        u32 offset;
        int ret;

        skb = rx_ring->buf[bd_ring->wp];
        rtw89_pci_sync_skb_for_cpu(rtwdev, skb);

        ret = rtw89_pci_rxbd_info_update(rtwdev, skb);
        if (ret) {
                rtw89_err(rtwdev, "failed to update %d RXBD info: %d\n",
                          bd_ring->wp, ret);
                goto err_sync_device;
        }

        rx_info = RTW89_PCI_RX_SKB_CB(skb);
        if (!rx_info->fs || !rx_info->ls) {
                rtw89_err(rtwdev, "cannot process RP frame not set FS/LS\n");
                return cnt;
        }

        rtw89_core_query_rxdesc(rtwdev, &desc_info, skb->data, rxinfo_size);

        /* first segment has RX desc */
        offset = desc_info.offset;
        offset += desc_info.long_rxdesc ? sizeof(struct rtw89_rxdesc_long) :
                                          sizeof(struct rtw89_rxdesc_short);
        for (; offset + rpp_size <= rx_info->len; offset += rpp_size) {
                rpp = (struct rtw89_pci_rpp_fmt *)(skb->data + offset);
                rtw89_pci_release_rpp(rtwdev, rpp);
        }

        rtw89_pci_sync_skb_for_device(rtwdev, skb);
        rtw89_pci_rxbd_increase(rx_ring, 1);
        cnt++;

        return cnt;

err_sync_device:
        rtw89_pci_sync_skb_for_device(rtwdev, skb);
        return 0;
}

static void rtw89_pci_release_tx(struct rtw89_dev *rtwdev,
                                 struct rtw89_pci_rx_ring *rx_ring,
                                 u32 cnt)
{
        struct rtw89_pci_dma_ring *bd_ring = &rx_ring->bd_ring;
        u32 release_cnt;

        while (cnt) {
                release_cnt = rtw89_pci_release_tx_skbs(rtwdev, rx_ring, cnt);
                if (!release_cnt) {
                        rtw89_err(rtwdev, "failed to release TX skbs\n");

                        /* skip the rest RXBD bufs */
                        rtw89_pci_rxbd_increase(rx_ring, cnt);
                        break;
                }

                cnt -= release_cnt;
        }

        rtw89_write16(rtwdev, bd_ring->addr_idx, bd_ring->wp);
}

static int rtw89_pci_poll_rpq_dma(struct rtw89_dev *rtwdev,
                                  struct rtw89_pci *rtwpci, int budget)
{
        struct rtw89_pci_rx_ring *rx_ring;
        u32 cnt;
        int work_done;

        rx_ring = &rtwpci->rx_rings[RTW89_RXCH_RPQ];

        spin_lock_bh(&rtwpci->trx_lock);

        cnt = rtw89_pci_rxbd_recalc(rtwdev, rx_ring);
        if (cnt == 0)
                goto out_unlock;

        rtw89_pci_release_tx(rtwdev, rx_ring, cnt);

out_unlock:
        spin_unlock_bh(&rtwpci->trx_lock);

        /* always release all RPQ */
        work_done = min_t(int, cnt, budget);
        rtwdev->napi_budget_countdown -= work_done;

        return work_done;
}

static void rtw89_pci_isr_rxd_unavail(struct rtw89_dev *rtwdev,
                                      struct rtw89_pci *rtwpci)
{
        struct rtw89_pci_rx_ring *rx_ring;
        struct rtw89_pci_dma_ring *bd_ring;
        u32 reg_idx;
        u16 hw_idx, hw_idx_next, host_idx;
        int i;

        for (i = 0; i < RTW89_RXCH_NUM; i++) {
                rx_ring = &rtwpci->rx_rings[i];
                bd_ring = &rx_ring->bd_ring;

                reg_idx = rtw89_read32(rtwdev, bd_ring->addr_idx);
                hw_idx = FIELD_GET(TXBD_HW_IDX_MASK, reg_idx);
                host_idx = FIELD_GET(TXBD_HOST_IDX_MASK, reg_idx);
                hw_idx_next = (hw_idx + 1) % bd_ring->len;

                if (hw_idx_next == host_idx)
                        rtw89_warn(rtwdev, "%d RXD unavailable\n", i);

                rtw89_debug(rtwdev, RTW89_DBG_TXRX,
                            "%d RXD unavailable, idx=0x%08x, len=%d\n",
                            i, reg_idx, bd_ring->len);
        }
}

static void rtw89_pci_recognize_intrs(struct rtw89_dev *rtwdev,
                                      struct rtw89_pci *rtwpci,
                                      struct rtw89_pci_isrs *isrs)
{
        isrs->halt_c2h_isrs = rtw89_read32(rtwdev, R_AX_HISR0) & rtwpci->halt_c2h_intrs;
        isrs->isrs[0] = rtw89_read32(rtwdev, R_AX_PCIE_HISR00) & rtwpci->intrs[0];
        isrs->isrs[1] = rtw89_read32(rtwdev, R_AX_PCIE_HISR10) & rtwpci->intrs[1];

        rtw89_write32(rtwdev, R_AX_HISR0, isrs->halt_c2h_isrs);
        rtw89_write32(rtwdev, R_AX_PCIE_HISR00, isrs->isrs[0]);
        rtw89_write32(rtwdev, R_AX_PCIE_HISR10, isrs->isrs[1]);
}

static void rtw89_pci_clear_isr0(struct rtw89_dev *rtwdev, u32 isr00)
{
        /* write 1 clear */
        rtw89_write32(rtwdev, R_AX_PCIE_HISR00, isr00);
}

static void rtw89_pci_enable_intr(struct rtw89_dev *rtwdev,
                                  struct rtw89_pci *rtwpci)
{
        rtw89_write32(rtwdev, R_AX_HIMR0, rtwpci->halt_c2h_intrs);
        rtw89_write32(rtwdev, R_AX_PCIE_HIMR00, rtwpci->intrs[0]);
        rtw89_write32(rtwdev, R_AX_PCIE_HIMR10, rtwpci->intrs[1]);
}

static void rtw89_pci_disable_intr(struct rtw89_dev *rtwdev,
                                   struct rtw89_pci *rtwpci)
{
        rtw89_write32(rtwdev, R_AX_HIMR0, 0);
        rtw89_write32(rtwdev, R_AX_PCIE_HIMR00, 0);
        rtw89_write32(rtwdev, R_AX_PCIE_HIMR10, 0);
}

static irqreturn_t rtw89_pci_interrupt_threadfn(int irq, void *dev)
{
        struct rtw89_dev *rtwdev = dev;
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_isrs isrs;
        unsigned long flags;

        spin_lock_irqsave(&rtwpci->irq_lock, flags);
        rtw89_pci_recognize_intrs(rtwdev, rtwpci, &isrs);
        spin_unlock_irqrestore(&rtwpci->irq_lock, flags);

        if (unlikely(isrs.isrs[0] & B_AX_RDU_INT))
                rtw89_pci_isr_rxd_unavail(rtwdev, rtwpci);

        if (unlikely(isrs.halt_c2h_isrs & B_AX_HALT_C2H_INT_EN))
                rtw89_ser_notify(rtwdev, rtw89_mac_get_err_status(rtwdev));

        if (likely(rtwpci->running)) {
                local_bh_disable();
                napi_schedule(&rtwdev->napi);
                local_bh_enable();
        }

        return IRQ_HANDLED;
}

static irqreturn_t rtw89_pci_interrupt_handler(int irq, void *dev)
{
        struct rtw89_dev *rtwdev = dev;
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        unsigned long flags;
        irqreturn_t irqret = IRQ_WAKE_THREAD;

        spin_lock_irqsave(&rtwpci->irq_lock, flags);

        /* If interrupt event is on the road, it is still trigger interrupt
         * even we have done pci_stop() to turn off IMR.
         */
        if (unlikely(!rtwpci->running)) {
                irqret = IRQ_HANDLED;
                goto exit;
        }

        rtw89_pci_disable_intr(rtwdev, rtwpci);
exit:
        spin_unlock_irqrestore(&rtwpci->irq_lock, flags);

        return irqret;
}

#define case_TXCHADDRS(txch) \
        case RTW89_TXCH_##txch: \
                *addr_num = R_AX_##txch##_TXBD_NUM; \
                *addr_idx = R_AX_##txch##_TXBD_IDX; \
                *addr_bdram = R_AX_##txch##_BDRAM_CTRL; \
                *addr_desa_l = R_AX_##txch##_TXBD_DESA_L; \
                *addr_desa_h = R_AX_##txch##_TXBD_DESA_H; \
                break

static int rtw89_pci_get_txch_addrs(enum rtw89_tx_channel txch,
                                    u32 *addr_num,
                                    u32 *addr_idx,
                                    u32 *addr_bdram,
                                    u32 *addr_desa_l,
                                    u32 *addr_desa_h)
{
        switch (txch) {
        case_TXCHADDRS(ACH0);
        case_TXCHADDRS(ACH1);
        case_TXCHADDRS(ACH2);
        case_TXCHADDRS(ACH3);
        case_TXCHADDRS(ACH4);
        case_TXCHADDRS(ACH5);
        case_TXCHADDRS(ACH6);
        case_TXCHADDRS(ACH7);
        case_TXCHADDRS(CH8);
        case_TXCHADDRS(CH9);
        case_TXCHADDRS(CH10);
        case_TXCHADDRS(CH11);
        case_TXCHADDRS(CH12);
        default:
                return -EINVAL;
        }

        return 0;
}

#undef case_TXCHADDRS

#define case_RXCHADDRS(rxch) \
        case RTW89_RXCH_##rxch: \
                *addr_num = R_AX_##rxch##_RXBD_NUM; \
                *addr_idx = R_AX_##rxch##_RXBD_IDX; \
                *addr_desa_l = R_AX_##rxch##_RXBD_DESA_L; \
                *addr_desa_h = R_AX_##rxch##_RXBD_DESA_H; \
                break

static int rtw89_pci_get_rxch_addrs(enum rtw89_rx_channel rxch,
                                    u32 *addr_num,
                                    u32 *addr_idx,
                                    u32 *addr_desa_l,
                                    u32 *addr_desa_h)
{
        switch (rxch) {
        case_RXCHADDRS(RXQ);
        case_RXCHADDRS(RPQ);
        default:
                return -EINVAL;
        }

        return 0;
}

#undef case_RXCHADDRS

static u32 rtw89_pci_get_avail_txbd_num(struct rtw89_pci_tx_ring *ring)
{
        struct rtw89_pci_dma_ring *bd_ring = &ring->bd_ring;

        /* reserved 1 desc check ring is full or not */
        if (bd_ring->rp > bd_ring->wp)
                return bd_ring->rp - bd_ring->wp - 1;

        return bd_ring->len - (bd_ring->wp - bd_ring->rp) - 1;
}

static
u32 __rtw89_pci_check_and_reclaim_tx_fwcmd_resource(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring = &rtwpci->tx_rings[RTW89_TXCH_CH12];
        u32 cnt;

        spin_lock_bh(&rtwpci->trx_lock);
        rtw89_pci_reclaim_tx_fwcmd(rtwdev, rtwpci);
        cnt = rtw89_pci_get_avail_txbd_num(tx_ring);
        spin_unlock_bh(&rtwpci->trx_lock);

        return cnt;
}

static u32 __rtw89_pci_check_and_reclaim_tx_resource(struct rtw89_dev *rtwdev,
                                                     u8 txch)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring = &rtwpci->tx_rings[txch];
        struct rtw89_pci_tx_wd_ring *wd_ring = &tx_ring->wd_ring;
        u32 bd_cnt, wd_cnt, min_cnt = 0;
        struct rtw89_pci_rx_ring *rx_ring;
        u32 cnt;

        rx_ring = &rtwpci->rx_rings[RTW89_RXCH_RPQ];

        spin_lock_bh(&rtwpci->trx_lock);
        bd_cnt = rtw89_pci_get_avail_txbd_num(tx_ring);
        wd_cnt = wd_ring->curr_num;

        if (wd_cnt == 0 || bd_cnt == 0) {
                cnt = rtw89_pci_rxbd_recalc(rtwdev, rx_ring);
                if (!cnt)
                        goto out_unlock;
                rtw89_pci_release_tx(rtwdev, rx_ring, cnt);
        }

        bd_cnt = rtw89_pci_get_avail_txbd_num(tx_ring);
        wd_cnt = wd_ring->curr_num;
        min_cnt = min(bd_cnt, wd_cnt);
        if (min_cnt == 0)
                rtw89_warn(rtwdev, "still no tx resource after reclaim\n");

out_unlock:
        spin_unlock_bh(&rtwpci->trx_lock);

        return min_cnt;
}

static u32 rtw89_pci_check_and_reclaim_tx_resource(struct rtw89_dev *rtwdev,
                                                   u8 txch)
{
        if (txch == RTW89_TXCH_CH12)
                return __rtw89_pci_check_and_reclaim_tx_fwcmd_resource(rtwdev);

        return __rtw89_pci_check_and_reclaim_tx_resource(rtwdev, txch);
}

static void __rtw89_pci_tx_kick_off(struct rtw89_dev *rtwdev, struct rtw89_pci_tx_ring *tx_ring)
{
        struct rtw89_pci_dma_ring *bd_ring = &tx_ring->bd_ring;
        u32 host_idx, addr;

        addr = bd_ring->addr_idx;
        host_idx = bd_ring->wp;
        rtw89_write16(rtwdev, addr, host_idx);
}

static void rtw89_pci_tx_bd_ring_update(struct rtw89_dev *rtwdev, struct rtw89_pci_tx_ring *tx_ring,
                                        int n_txbd)
{
        struct rtw89_pci_dma_ring *bd_ring = &tx_ring->bd_ring;
        u32 host_idx, len;

        len = bd_ring->len;
        host_idx = bd_ring->wp + n_txbd;
        host_idx = host_idx < len ? host_idx : host_idx - len;

        bd_ring->wp = host_idx;
}

static void rtw89_pci_ops_tx_kick_off(struct rtw89_dev *rtwdev, u8 txch)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring = &rtwpci->tx_rings[txch];

        spin_lock_bh(&rtwpci->trx_lock);
        __rtw89_pci_tx_kick_off(rtwdev, tx_ring);
        spin_unlock_bh(&rtwpci->trx_lock);
}

static void __pci_flush_txch(struct rtw89_dev *rtwdev, u8 txch, bool drop)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring = &rtwpci->tx_rings[txch];
        struct rtw89_pci_dma_ring *bd_ring = &tx_ring->bd_ring;
        u32 cur_idx, cur_rp;
        u8 i;

        /* Because the time taked by the I/O is a bit dynamic, it's hard to
         * define a reasonable fixed total timeout to use read_poll_timeout*
         * helper. Instead, we can ensure a reasonable polling times, so we
         * just use for loop with udelay here.
         */
        for (i = 0; i < 60; i++) {
                cur_idx = rtw89_read32(rtwdev, bd_ring->addr_idx);
                cur_rp = FIELD_GET(TXBD_HW_IDX_MASK, cur_idx);
                if (cur_rp == bd_ring->wp)
                        return;

                udelay(1);
        }

        if (!drop)
                rtw89_info(rtwdev, "timed out to flush pci txch: %d\n", txch);
}

static void __rtw89_pci_ops_flush_txchs(struct rtw89_dev *rtwdev, u32 txchs,
                                        bool drop)
{
        u8 i;

        for (i = 0; i < RTW89_TXCH_NUM; i++) {
                /* It may be unnecessary to flush FWCMD queue. */
                if (i == RTW89_TXCH_CH12)
                        continue;

                if (txchs & BIT(i))
                        __pci_flush_txch(rtwdev, i, drop);
        }
}

static void rtw89_pci_ops_flush_queues(struct rtw89_dev *rtwdev, u32 queues,
                                       bool drop)
{
        __rtw89_pci_ops_flush_txchs(rtwdev, BIT(RTW89_TXCH_NUM) - 1, drop);
}

static int rtw89_pci_txwd_submit(struct rtw89_dev *rtwdev,
                                 struct rtw89_pci_tx_ring *tx_ring,
                                 struct rtw89_pci_tx_wd *txwd,
                                 struct rtw89_core_tx_request *tx_req)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_tx_desc_info *desc_info = &tx_req->desc_info;
        struct rtw89_txwd_body *txwd_body;
        struct rtw89_txwd_info *txwd_info;
        struct rtw89_pci_tx_wp_info *txwp_info;
        struct rtw89_pci_tx_addr_info_32 *txaddr_info;
        struct pci_dev *pdev = rtwpci->pdev;
        struct sk_buff *skb = tx_req->skb;
        struct rtw89_pci_tx_data *tx_data = RTW89_PCI_TX_SKB_CB(skb);
        bool en_wd_info = desc_info->en_wd_info;
        u32 txwd_len;
        u32 txwp_len;
        u32 txaddr_info_len;
        dma_addr_t dma;
        int ret;

        rtw89_core_fill_txdesc(rtwdev, desc_info, txwd->vaddr);

        dma = dma_map_single(&pdev->dev, skb->data, skb->len, DMA_TO_DEVICE);
        if (dma_mapping_error(&pdev->dev, dma)) {
                rtw89_err(rtwdev, "failed to map skb dma data\n");
                ret = -EBUSY;
                goto err;
        }

        tx_data->dma = dma;

        txaddr_info_len = sizeof(*txaddr_info);
        txwp_len = sizeof(*txwp_info);
        txwd_len = sizeof(*txwd_body);
        txwd_len += en_wd_info ? sizeof(*txwd_info) : 0;

        txwp_info = txwd->vaddr + txwd_len;
        txwp_info->seq0 = cpu_to_le16(txwd->seq | RTW89_PCI_TXWP_VALID);
        txwp_info->seq1 = 0;
        txwp_info->seq2 = 0;
        txwp_info->seq3 = 0;

        tx_ring->tx_cnt++;
        txaddr_info = txwd->vaddr + txwd_len + txwp_len;
        txaddr_info->length = cpu_to_le16(skb->len);
        txaddr_info->option = cpu_to_le16(RTW89_PCI_ADDR_MSDU_LS |
                                          RTW89_PCI_ADDR_NUM(1));
        txaddr_info->dma = cpu_to_le32(dma);

        txwd->len = txwd_len + txwp_len + txaddr_info_len;

        skb_queue_tail(&txwd->queue, skb);

        return 0;

err:
        return ret;
}

static int rtw89_pci_fwcmd_submit(struct rtw89_dev *rtwdev,
                                  struct rtw89_pci_tx_ring *tx_ring,
                                  struct rtw89_pci_tx_bd_32 *txbd,
                                  struct rtw89_core_tx_request *tx_req)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_tx_desc_info *desc_info = &tx_req->desc_info;
        struct rtw89_txwd_body *txwd_body;
        struct pci_dev *pdev = rtwpci->pdev;
        struct sk_buff *skb = tx_req->skb;
        struct rtw89_pci_tx_data *tx_data = RTW89_PCI_TX_SKB_CB(skb);
        dma_addr_t dma;

        txwd_body = (struct rtw89_txwd_body *)skb_push(skb, sizeof(*txwd_body));
        memset(txwd_body, 0, sizeof(*txwd_body));
        rtw89_core_fill_txdesc(rtwdev, desc_info, txwd_body);

        dma = dma_map_single(&pdev->dev, skb->data, skb->len, DMA_TO_DEVICE);
        if (dma_mapping_error(&pdev->dev, dma)) {
                rtw89_err(rtwdev, "failed to map fwcmd dma data\n");
                return -EBUSY;
        }

        tx_data->dma = dma;
        txbd->option = cpu_to_le16(RTW89_PCI_TXBD_OPTION_LS);
        txbd->length = cpu_to_le16(skb->len);

        txbd->dma = cpu_to_le32(tx_data->dma);
        skb_queue_tail(&rtwpci->h2c_queue, skb);

        rtw89_pci_tx_bd_ring_update(rtwdev, tx_ring, 1);

        return 0;
}

static int rtw89_pci_txbd_submit(struct rtw89_dev *rtwdev,
                                 struct rtw89_pci_tx_ring *tx_ring,
                                 struct rtw89_pci_tx_bd_32 *txbd,
                                 struct rtw89_core_tx_request *tx_req)
{
        struct rtw89_pci_tx_wd *txwd;
        int ret;

        /* FWCMD queue doesn't have wd pages. Instead, it submits the CMD
         * buffer with WD BODY only. So here we don't need to check the free
         * pages of the wd ring.
         */
        if (tx_ring->txch == RTW89_TXCH_CH12)
                return rtw89_pci_fwcmd_submit(rtwdev, tx_ring, txbd, tx_req);

        txwd = rtw89_pci_dequeue_txwd(tx_ring);
        if (!txwd) {
                rtw89_err(rtwdev, "no available TXWD\n");
                ret = -ENOSPC;
                goto err;
        }

        ret = rtw89_pci_txwd_submit(rtwdev, tx_ring, txwd, tx_req);
        if (ret) {
                rtw89_err(rtwdev, "failed to submit TXWD %d\n", txwd->seq);
                goto err_enqueue_wd;
        }

        list_add_tail(&txwd->list, &tx_ring->busy_pages);

        txbd->option = cpu_to_le16(RTW89_PCI_TXBD_OPTION_LS);
        txbd->length = cpu_to_le16(txwd->len);
        txbd->dma = cpu_to_le32(txwd->paddr);

        rtw89_pci_tx_bd_ring_update(rtwdev, tx_ring, 1);

        return 0;

err_enqueue_wd:
        rtw89_pci_enqueue_txwd(tx_ring, txwd);
err:
        return ret;
}

static int rtw89_pci_tx_write(struct rtw89_dev *rtwdev, struct rtw89_core_tx_request *tx_req,
                              u8 txch)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring;
        struct rtw89_pci_tx_bd_32 *txbd;
        u32 n_avail_txbd;
        int ret = 0;

        /* check the tx type and dma channel for fw cmd queue */
        if ((txch == RTW89_TXCH_CH12 ||
             tx_req->tx_type == RTW89_CORE_TX_TYPE_FWCMD) &&
            (txch != RTW89_TXCH_CH12 ||
             tx_req->tx_type != RTW89_CORE_TX_TYPE_FWCMD)) {
                rtw89_err(rtwdev, "only fw cmd uses dma channel 12\n");
                return -EINVAL;
        }

        tx_ring = &rtwpci->tx_rings[txch];
        spin_lock_bh(&rtwpci->trx_lock);

        n_avail_txbd = rtw89_pci_get_avail_txbd_num(tx_ring);
        if (n_avail_txbd == 0) {
                rtw89_err(rtwdev, "no available TXBD\n");
                ret = -ENOSPC;
                goto err_unlock;
        }

        txbd = rtw89_pci_get_next_txbd(tx_ring);
        ret = rtw89_pci_txbd_submit(rtwdev, tx_ring, txbd, tx_req);
        if (ret) {
                rtw89_err(rtwdev, "failed to submit TXBD\n");
                goto err_unlock;
        }

        spin_unlock_bh(&rtwpci->trx_lock);
        return 0;

err_unlock:
        spin_unlock_bh(&rtwpci->trx_lock);
        return ret;
}

static int rtw89_pci_ops_tx_write(struct rtw89_dev *rtwdev, struct rtw89_core_tx_request *tx_req)
{
        struct rtw89_tx_desc_info *desc_info = &tx_req->desc_info;
        int ret;

        ret = rtw89_pci_tx_write(rtwdev, tx_req, desc_info->ch_dma);
        if (ret) {
                rtw89_err(rtwdev, "failed to TX Queue %d\n", desc_info->ch_dma);
                return ret;
        }

        return 0;
}

static const struct rtw89_pci_bd_ram bd_ram_table[RTW89_TXCH_NUM] = {
        [RTW89_TXCH_ACH0] = {.start_idx = 0,  .max_num = 5, .min_num = 2},
        [RTW89_TXCH_ACH1] = {.start_idx = 5,  .max_num = 5, .min_num = 2},
        [RTW89_TXCH_ACH2] = {.start_idx = 10, .max_num = 5, .min_num = 2},
        [RTW89_TXCH_ACH3] = {.start_idx = 15, .max_num = 5, .min_num = 2},
        [RTW89_TXCH_ACH4] = {.start_idx = 20, .max_num = 5, .min_num = 2},
        [RTW89_TXCH_ACH5] = {.start_idx = 25, .max_num = 5, .min_num = 2},
        [RTW89_TXCH_ACH6] = {.start_idx = 30, .max_num = 5, .min_num = 2},
        [RTW89_TXCH_ACH7] = {.start_idx = 35, .max_num = 5, .min_num = 2},
        [RTW89_TXCH_CH8]  = {.start_idx = 40, .max_num = 5, .min_num = 1},
        [RTW89_TXCH_CH9]  = {.start_idx = 45, .max_num = 5, .min_num = 1},
        [RTW89_TXCH_CH10] = {.start_idx = 50, .max_num = 5, .min_num = 1},
        [RTW89_TXCH_CH11] = {.start_idx = 55, .max_num = 5, .min_num = 1},
        [RTW89_TXCH_CH12] = {.start_idx = 60, .max_num = 4, .min_num = 1},
};

static void rtw89_pci_reset_trx_rings(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring;
        struct rtw89_pci_rx_ring *rx_ring;
        struct rtw89_pci_dma_ring *bd_ring;
        const struct rtw89_pci_bd_ram *bd_ram;
        u32 addr_num;
        u32 addr_bdram;
        u32 addr_desa_l;
        u32 val32;
        int i;

        for (i = 0; i < RTW89_TXCH_NUM; i++) {
                tx_ring = &rtwpci->tx_rings[i];
                bd_ring = &tx_ring->bd_ring;
                bd_ram = &bd_ram_table[i];
                addr_num = bd_ring->addr_num;
                addr_bdram = bd_ring->addr_bdram;
                addr_desa_l = bd_ring->addr_desa_l;
                bd_ring->wp = 0;
                bd_ring->rp = 0;

                val32 = FIELD_PREP(BDRAM_SIDX_MASK, bd_ram->start_idx) |
                        FIELD_PREP(BDRAM_MAX_MASK, bd_ram->max_num) |
                        FIELD_PREP(BDRAM_MIN_MASK, bd_ram->min_num);

                rtw89_write16(rtwdev, addr_num, bd_ring->len);
                rtw89_write32(rtwdev, addr_bdram, val32);
                rtw89_write32(rtwdev, addr_desa_l, bd_ring->dma);
        }

        for (i = 0; i < RTW89_RXCH_NUM; i++) {
                rx_ring = &rtwpci->rx_rings[i];
                bd_ring = &rx_ring->bd_ring;
                addr_num = bd_ring->addr_num;
                addr_desa_l = bd_ring->addr_desa_l;
                bd_ring->wp = 0;
                bd_ring->rp = 0;
                rx_ring->diliver_skb = NULL;
                rx_ring->diliver_desc.ready = false;

                rtw89_write16(rtwdev, addr_num, bd_ring->len);
                rtw89_write32(rtwdev, addr_desa_l, bd_ring->dma);
        }
}

static void rtw89_pci_release_tx_ring(struct rtw89_dev *rtwdev,
                                      struct rtw89_pci_tx_ring *tx_ring)
{
        rtw89_pci_release_busy_txwd(rtwdev, tx_ring);
        rtw89_pci_release_pending_txwd_skb(rtwdev, tx_ring);
}

static void rtw89_pci_ops_reset(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        int txch;

        rtw89_pci_reset_trx_rings(rtwdev);

        spin_lock_bh(&rtwpci->trx_lock);
        for (txch = 0; txch < RTW89_TXCH_NUM; txch++) {
                if (txch == RTW89_TXCH_CH12) {
                        rtw89_pci_release_fwcmd(rtwdev, rtwpci,
                                                skb_queue_len(&rtwpci->h2c_queue), true);
                        continue;
                }
                rtw89_pci_release_tx_ring(rtwdev, &rtwpci->tx_rings[txch]);
        }
        spin_unlock_bh(&rtwpci->trx_lock);
}

static int rtw89_pci_ops_start(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        unsigned long flags;

        rtw89_core_napi_start(rtwdev);

        spin_lock_irqsave(&rtwpci->irq_lock, flags);
        rtwpci->running = true;
        rtw89_pci_enable_intr(rtwdev, rtwpci);
        spin_unlock_irqrestore(&rtwpci->irq_lock, flags);

        return 0;
}

static void rtw89_pci_ops_stop(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct pci_dev *pdev = rtwpci->pdev;
        unsigned long flags;

        spin_lock_irqsave(&rtwpci->irq_lock, flags);
        rtwpci->running = false;
        rtw89_pci_disable_intr(rtwdev, rtwpci);
        spin_unlock_irqrestore(&rtwpci->irq_lock, flags);

        synchronize_irq(pdev->irq);
        rtw89_core_napi_stop(rtwdev);
}

static void rtw89_pci_ops_write32(struct rtw89_dev *rtwdev, u32 addr, u32 data);

static u32 rtw89_pci_ops_read32_cmac(struct rtw89_dev *rtwdev, u32 addr)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        u32 val = readl(rtwpci->mmap + addr);
        int count;

        for (count = 0; ; count++) {
                if (val != RTW89_R32_DEAD)
                        return val;
                if (count >= MAC_REG_POOL_COUNT) {
                        rtw89_warn(rtwdev, "addr %#x = %#x\n", addr, val);
                        return RTW89_R32_DEAD;
                }
                rtw89_pci_ops_write32(rtwdev, R_AX_CK_EN, B_AX_CMAC_ALLCKEN);
                val = readl(rtwpci->mmap + addr);
        }

        return val;
}

static u8 rtw89_pci_ops_read8(struct rtw89_dev *rtwdev, u32 addr)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        u32 addr32, val32, shift;

        if (!ACCESS_CMAC(addr))
                return readb(rtwpci->mmap + addr);

        addr32 = addr & ~0x3;
        shift = (addr & 0x3) * 8;
        val32 = rtw89_pci_ops_read32_cmac(rtwdev, addr32);
        return val32 >> shift;
}

static u16 rtw89_pci_ops_read16(struct rtw89_dev *rtwdev, u32 addr)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        u32 addr32, val32, shift;

        if (!ACCESS_CMAC(addr))
                return readw(rtwpci->mmap + addr);

        addr32 = addr & ~0x3;
        shift = (addr & 0x3) * 8;
        val32 = rtw89_pci_ops_read32_cmac(rtwdev, addr32);
        return val32 >> shift;
}

static u32 rtw89_pci_ops_read32(struct rtw89_dev *rtwdev, u32 addr)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;

        if (!ACCESS_CMAC(addr))
                return readl(rtwpci->mmap + addr);

        return rtw89_pci_ops_read32_cmac(rtwdev, addr);
}

static void rtw89_pci_ops_write8(struct rtw89_dev *rtwdev, u32 addr, u8 data)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;

        writeb(data, rtwpci->mmap + addr);
}

static void rtw89_pci_ops_write16(struct rtw89_dev *rtwdev, u32 addr, u16 data)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;

        writew(data, rtwpci->mmap + addr);
}

static void rtw89_pci_ops_write32(struct rtw89_dev *rtwdev, u32 addr, u32 data)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;

        writel(data, rtwpci->mmap + addr);
}

static void rtw89_pci_ctrl_dma_all(struct rtw89_dev *rtwdev, bool enable)
{
        if (enable) {
                rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1,
                                  B_AX_TXHCI_EN | B_AX_RXHCI_EN);
                rtw89_write32_clr(rtwdev, R_AX_PCIE_DMA_STOP1,
                                  B_AX_STOP_PCIEIO);
        } else {
                rtw89_write32_set(rtwdev, R_AX_PCIE_DMA_STOP1,
                                  B_AX_STOP_PCIEIO);
                rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1,
                                  B_AX_TXHCI_EN | B_AX_RXHCI_EN);
        }
}

static int rtw89_pci_check_mdio(struct rtw89_dev *rtwdev, u8 addr, u8 speed, u16 rw_bit)
{
        u16 val;

        rtw89_write8(rtwdev, R_AX_MDIO_CFG, addr & 0x1F);

        val = rtw89_read16(rtwdev, R_AX_MDIO_CFG);
        switch (speed) {
        case PCIE_PHY_GEN1:
                if (addr < 0x20)
                        val = u16_replace_bits(val, MDIO_PG0_G1, B_AX_MDIO_PHY_ADDR_MASK);
                else
                        val = u16_replace_bits(val, MDIO_PG1_G1, B_AX_MDIO_PHY_ADDR_MASK);
                break;
        case PCIE_PHY_GEN2:
                if (addr < 0x20)
                        val = u16_replace_bits(val, MDIO_PG0_G2, B_AX_MDIO_PHY_ADDR_MASK);
                else
                        val = u16_replace_bits(val, MDIO_PG1_G2, B_AX_MDIO_PHY_ADDR_MASK);
                break;
        default:
                rtw89_err(rtwdev, "[ERR]Error Speed %d!\n", speed);
                return -EINVAL;
        }
        rtw89_write16(rtwdev, R_AX_MDIO_CFG, val);
        rtw89_write16_set(rtwdev, R_AX_MDIO_CFG, rw_bit);

        return read_poll_timeout(rtw89_read16, val, !(val & rw_bit), 10, 2000,
                                 false, rtwdev, R_AX_MDIO_CFG);
}

static int
rtw89_read16_mdio(struct rtw89_dev *rtwdev, u8 addr, u8 speed, u16 *val)
{
        int ret;

        ret = rtw89_pci_check_mdio(rtwdev, addr, speed, B_AX_MDIO_RFLAG);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]MDIO R16 0x%X fail ret=%d!\n", addr, ret);
                return ret;
        }
        *val = rtw89_read16(rtwdev, R_AX_MDIO_RDATA);

        return 0;
}

static int
rtw89_write16_mdio(struct rtw89_dev *rtwdev, u8 addr, u16 data, u8 speed)
{
        int ret;

        rtw89_write16(rtwdev, R_AX_MDIO_WDATA, data);
        ret = rtw89_pci_check_mdio(rtwdev, addr, speed, B_AX_MDIO_WFLAG);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]MDIO W16 0x%X = %x fail ret=%d!\n", addr, data, ret);
                return ret;
        }

        return 0;
}

static int rtw89_write16_mdio_set(struct rtw89_dev *rtwdev, u8 addr, u16 mask, u8 speed)
{
        int ret;
        u16 val;

        ret = rtw89_read16_mdio(rtwdev, addr, speed, &val);
        if (ret)
                return ret;
        ret = rtw89_write16_mdio(rtwdev, addr, val | mask, speed);
        if (ret)
                return ret;

        return 0;
}

static int rtw89_write16_mdio_clr(struct rtw89_dev *rtwdev, u8 addr, u16 mask, u8 speed)
{
        int ret;
        u16 val;

        ret = rtw89_read16_mdio(rtwdev, addr, speed, &val);
        if (ret)
                return ret;
        ret = rtw89_write16_mdio(rtwdev, addr, val & ~mask, speed);
        if (ret)
                return ret;

        return 0;
}

static int rtw89_dbi_write8(struct rtw89_dev *rtwdev, u16 addr, u8 data)
{
        u16 write_addr;
        u16 remainder = addr & ~(B_AX_DBI_ADDR_MSK | B_AX_DBI_WREN_MSK);
        u8 flag;
        int ret;

        write_addr = addr & B_AX_DBI_ADDR_MSK;
        write_addr |= u16_encode_bits(BIT(remainder), B_AX_DBI_WREN_MSK);
        rtw89_write8(rtwdev, R_AX_DBI_WDATA + remainder, data);
        rtw89_write16(rtwdev, R_AX_DBI_FLAG, write_addr);
        rtw89_write8(rtwdev, R_AX_DBI_FLAG + 2, B_AX_DBI_WFLAG >> 16);

        ret = read_poll_timeout_atomic(rtw89_read8, flag, !flag, 10,
                                       10 * RTW89_PCI_WR_RETRY_CNT, false,
                                       rtwdev, R_AX_DBI_FLAG + 2);
        if (ret)
                WARN(flag, "failed to write to DBI register, addr=0x%04x\n",
                     addr);

        return ret;
}

static int rtw89_dbi_read8(struct rtw89_dev *rtwdev, u16 addr, u8 *value)
{
        u16 read_addr = addr & B_AX_DBI_ADDR_MSK;
        u8 flag;
        int ret;

        rtw89_write16(rtwdev, R_AX_DBI_FLAG, read_addr);
        rtw89_write8(rtwdev, R_AX_DBI_FLAG + 2, B_AX_DBI_RFLAG >> 16);

        ret = read_poll_timeout_atomic(rtw89_read8, flag, !flag, 10,
                                       10 * RTW89_PCI_WR_RETRY_CNT, false,
                                       rtwdev, R_AX_DBI_FLAG + 2);

        if (!ret) {
                read_addr = R_AX_DBI_RDATA + (addr & 3);
                *value = rtw89_read8(rtwdev, read_addr);
        } else {
                WARN(1, "failed to read DBI register, addr=0x%04x\n", addr);
                ret = -EIO;
        }

        return ret;
}

static int rtw89_dbi_write8_set(struct rtw89_dev *rtwdev, u16 addr, u8 bit)
{
        u8 value;
        int ret;

        ret = rtw89_dbi_read8(rtwdev, addr, &value);
        if (ret)
                return ret;

        value |= bit;
        ret = rtw89_dbi_write8(rtwdev, addr, value);

        return ret;
}

static int rtw89_dbi_write8_clr(struct rtw89_dev *rtwdev, u16 addr, u8 bit)
{
        u8 value;
        int ret;

        ret = rtw89_dbi_read8(rtwdev, addr, &value);
        if (ret)
                return ret;

        value &= ~bit;
        ret = rtw89_dbi_write8(rtwdev, addr, value);

        return ret;
}

static int
__get_target(struct rtw89_dev *rtwdev, u16 *target, enum rtw89_pcie_phy phy_rate)
{
        u16 val, tar;
        int ret;

        /* Enable counter */
        ret = rtw89_read16_mdio(rtwdev, RAC_CTRL_PPR_V1, phy_rate, &val);
        if (ret)
                return ret;
        ret = rtw89_write16_mdio(rtwdev, RAC_CTRL_PPR_V1, val & ~B_AX_CLK_CALIB_EN,
                                 phy_rate);
        if (ret)
                return ret;
        ret = rtw89_write16_mdio(rtwdev, RAC_CTRL_PPR_V1, val | B_AX_CLK_CALIB_EN,
                                 phy_rate);
        if (ret)
                return ret;

        fsleep(300);

        ret = rtw89_read16_mdio(rtwdev, RAC_CTRL_PPR_V1, phy_rate, &tar);
        if (ret)
                return ret;
        ret = rtw89_write16_mdio(rtwdev, RAC_CTRL_PPR_V1, val & ~B_AX_CLK_CALIB_EN,
                                 phy_rate);
        if (ret)
                return ret;

        tar = tar & 0x0FFF;
        if (tar == 0 || tar == 0x0FFF) {
                rtw89_err(rtwdev, "[ERR]Get target failed.\n");
                return -EINVAL;
        }

        *target = tar;

        return 0;
}

static int rtw89_pci_auto_refclk_cal(struct rtw89_dev *rtwdev, bool autook_en)
{
        enum rtw89_pcie_phy phy_rate;
        u16 val16, mgn_set, div_set, tar;
        u8 val8, bdr_ori;
        bool l1_flag = false;
        int ret = 0;

        if ((rtwdev->chip->chip_id == RTL8852A && rtwdev->hal.cv == CHIP_CBV) ||
            rtwdev->chip->chip_id == RTL8852C)
                return 0;

        ret = rtw89_dbi_read8(rtwdev, RTW89_PCIE_PHY_RATE, &val8);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]dbi_r8_pcie %X\n", RTW89_PCIE_PHY_RATE);
                return ret;
        }

        if (FIELD_GET(RTW89_PCIE_PHY_RATE_MASK, val8) == 0x1) {
                phy_rate = PCIE_PHY_GEN1;
        } else if (FIELD_GET(RTW89_PCIE_PHY_RATE_MASK, val8) == 0x2) {
                phy_rate = PCIE_PHY_GEN2;
        } else {
                rtw89_err(rtwdev, "[ERR]PCIe PHY rate %#x not support\n", val8);
                return -EOPNOTSUPP;
        }
        /* Disable L1BD */
        ret = rtw89_dbi_read8(rtwdev, RTW89_PCIE_L1_CTRL, &bdr_ori);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]dbi_r8_pcie %X\n", RTW89_PCIE_L1_CTRL);
                return ret;
        }

        if (bdr_ori & RTW89_PCIE_BIT_L1) {
                ret = rtw89_dbi_write8(rtwdev, RTW89_PCIE_L1_CTRL,
                                       bdr_ori & ~RTW89_PCIE_BIT_L1);
                if (ret) {
                        rtw89_err(rtwdev, "[ERR]dbi_w8_pcie %X\n", RTW89_PCIE_L1_CTRL);
                        return ret;
                }
                l1_flag = true;
        }

        ret = rtw89_read16_mdio(rtwdev, RAC_CTRL_PPR_V1, phy_rate, &val16);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]mdio_r16_pcie %X\n", RAC_CTRL_PPR_V1);
                goto end;
        }

        if (val16 & B_AX_CALIB_EN) {
                ret = rtw89_write16_mdio(rtwdev, RAC_CTRL_PPR_V1,
                                         val16 & ~B_AX_CALIB_EN, phy_rate);
                if (ret) {
                        rtw89_err(rtwdev, "[ERR]mdio_w16_pcie %X\n", RAC_CTRL_PPR_V1);
                        goto end;
                }
        }

        if (!autook_en)
                goto end;
        /* Set div */
        ret = rtw89_write16_mdio_clr(rtwdev, RAC_CTRL_PPR_V1, B_AX_DIV, phy_rate);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]mdio_w16_pcie %X\n", RAC_CTRL_PPR_V1);
                goto end;
        }

        /* Obtain div and margin */
        ret = __get_target(rtwdev, &tar, phy_rate);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]1st get target fail %d\n", ret);
                goto end;
        }

        mgn_set = tar * INTF_INTGRA_HOSTREF_V1 / INTF_INTGRA_MINREF_V1 - tar;

        if (mgn_set >= 128) {
                div_set = 0x0003;
                mgn_set = 0x000F;
        } else if (mgn_set >= 64) {
                div_set = 0x0003;
                mgn_set >>= 3;
        } else if (mgn_set >= 32) {
                div_set = 0x0002;
                mgn_set >>= 2;
        } else if (mgn_set >= 16) {
                div_set = 0x0001;
                mgn_set >>= 1;
        } else if (mgn_set == 0) {
                rtw89_err(rtwdev, "[ERR]cal mgn is 0,tar = %d\n", tar);
                goto end;
        } else {
                div_set = 0x0000;
        }

        ret = rtw89_read16_mdio(rtwdev, RAC_CTRL_PPR_V1, phy_rate, &val16);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]mdio_r16_pcie %X\n", RAC_CTRL_PPR_V1);
                goto end;
        }

        val16 |= u16_encode_bits(div_set, B_AX_DIV);

        ret = rtw89_write16_mdio(rtwdev, RAC_CTRL_PPR_V1, val16, phy_rate);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]mdio_w16_pcie %X\n", RAC_CTRL_PPR_V1);
                goto end;
        }

        ret = __get_target(rtwdev, &tar, phy_rate);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]2nd get target fail %d\n", ret);
                goto end;
        }

        rtw89_debug(rtwdev, RTW89_DBG_HCI, "[TRACE]target = 0x%X, div = 0x%X, margin = 0x%X\n",
                    tar, div_set, mgn_set);
        ret = rtw89_write16_mdio(rtwdev, RAC_SET_PPR_V1,
                                 (tar & 0x0FFF) | (mgn_set << 12), phy_rate);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]mdio_w16_pcie %X\n", RAC_SET_PPR_V1);
                goto end;
        }

        /* Enable function */
        ret = rtw89_write16_mdio_set(rtwdev, RAC_CTRL_PPR_V1, B_AX_CALIB_EN, phy_rate);
        if (ret) {
                rtw89_err(rtwdev, "[ERR]mdio_w16_pcie %X\n", RAC_CTRL_PPR_V1);
                goto end;
        }

        /* CLK delay = 0 */
        ret = rtw89_dbi_write8(rtwdev, RTW89_PCIE_CLK_CTRL, PCIE_CLKDLY_HW_0);

end:
        /* Set L1BD to ori */
        if (l1_flag) {
                ret = rtw89_dbi_write8(rtwdev, RTW89_PCIE_L1_CTRL, bdr_ori);
                if (ret) {
                        rtw89_err(rtwdev, "[ERR]dbi_w8_pcie %X\n", RTW89_PCIE_L1_CTRL);
                        return ret;
                }
        }

        return ret;
}

static int rtw89_pci_deglitch_setting(struct rtw89_dev *rtwdev)
{
        int ret;

        if (rtwdev->chip->chip_id != RTL8852A)
                return 0;

        ret = rtw89_write16_mdio_clr(rtwdev, RAC_ANA24, B_AX_DEGLITCH,
                                     PCIE_PHY_GEN1);
        if (ret)
                return ret;
        ret = rtw89_write16_mdio_clr(rtwdev, RAC_ANA24, B_AX_DEGLITCH,
                                     PCIE_PHY_GEN2);
        if (ret)
                return ret;

        return 0;
}

static void rtw89_pci_rxdma_prefth(struct rtw89_dev *rtwdev)
{
        rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_DIS_RXDMA_PRE);
}

static void rtw89_pci_l1off_pwroff(struct rtw89_dev *rtwdev)
{
        if (rtwdev->chip->chip_id == RTL8852C)
                return;

        rtw89_write32_clr(rtwdev, R_AX_PCIE_PS_CTRL, B_AX_L1OFF_PWR_OFF_EN);
}

static u32 rtw89_pci_l2_rxen_lat(struct rtw89_dev *rtwdev)
{
        int ret;

        if (rtwdev->chip->chip_id == RTL8852C)
                return 0;

        ret = rtw89_write16_mdio_clr(rtwdev, RAC_ANA26, B_AX_RXEN,
                                     PCIE_PHY_GEN1);
        if (ret)
                return ret;

        ret = rtw89_write16_mdio_clr(rtwdev, RAC_ANA26, B_AX_RXEN,
                                     PCIE_PHY_GEN2);
        if (ret)
                return ret;

        return 0;
}

static void rtw89_pci_aphy_pwrcut(struct rtw89_dev *rtwdev)
{
        if (rtwdev->chip->chip_id != RTL8852A)
                return;

        rtw89_write32_clr(rtwdev, R_AX_SYS_PW_CTRL, B_AX_PSUS_OFF_CAPC_EN);
}

static void rtw89_pci_hci_ldo(struct rtw89_dev *rtwdev)
{
        if (rtwdev->chip->chip_id != RTL8852A)
                return;

        rtw89_write32_set(rtwdev, R_AX_SYS_SDIO_CTRL,
                          B_AX_PCIE_DIS_L2_CTRL_LDO_HCI);
        rtw89_write32_clr(rtwdev, R_AX_SYS_SDIO_CTRL,
                          B_AX_PCIE_DIS_WLSUS_AFT_PDN);
}

static void rtw89_pci_set_sic(struct rtw89_dev *rtwdev)
{
        if (rtwdev->chip->chip_id == RTL8852C)
                return;

        rtw89_write32_clr(rtwdev, R_AX_PCIE_EXP_CTRL,
                          B_AX_SIC_EN_FORCE_CLKREQ);
}

static void rtw89_pci_set_dbg(struct rtw89_dev *rtwdev)
{
        if (rtwdev->chip->chip_id == RTL8852C)
                return;

        rtw89_write32_set(rtwdev, R_AX_PCIE_DBG_CTRL,
                          B_AX_ASFF_FULL_NO_STK | B_AX_EN_STUCK_DBG);

        if (rtwdev->chip->chip_id == RTL8852A)
                rtw89_write32_set(rtwdev, R_AX_PCIE_EXP_CTRL,
                                  B_AX_EN_CHKDSC_NO_RX_STUCK);
}

static void rtw89_pci_clr_idx_all(struct rtw89_dev *rtwdev)
{
        u32 val = B_AX_CLR_ACH0_IDX | B_AX_CLR_ACH1_IDX | B_AX_CLR_ACH2_IDX |
                  B_AX_CLR_ACH3_IDX | B_AX_CLR_CH8_IDX | B_AX_CLR_CH9_IDX |
                  B_AX_CLR_CH12_IDX;

        if (rtwdev->chip->chip_id == RTL8852A)
                val |= B_AX_CLR_ACH4_IDX | B_AX_CLR_ACH5_IDX |
                       B_AX_CLR_ACH6_IDX | B_AX_CLR_ACH7_IDX;
        /* clear DMA indexes */
        rtw89_write32_set(rtwdev, R_AX_TXBD_RWPTR_CLR1, val);
        if (rtwdev->chip->chip_id == RTL8852A)
                rtw89_write32_set(rtwdev, R_AX_TXBD_RWPTR_CLR2,
                                  B_AX_CLR_CH10_IDX | B_AX_CLR_CH11_IDX);
        rtw89_write32_set(rtwdev, R_AX_RXBD_RWPTR_CLR,
                          B_AX_CLR_RXQ_IDX | B_AX_CLR_RPQ_IDX);
}

static int rtw89_pci_ops_deinit(struct rtw89_dev *rtwdev)
{
        if (rtwdev->chip->chip_id == RTL8852A) {
                /* ltr sw trigger */
                rtw89_write32_set(rtwdev, R_AX_LTR_CTRL_0, B_AX_APP_LTR_IDLE);
        }
        rtw89_pci_ctrl_dma_all(rtwdev, false);
        rtw89_pci_clr_idx_all(rtwdev);

        return 0;
}

static int rtw89_pci_ops_mac_pre_init(struct rtw89_dev *rtwdev)
{
        u32 dma_busy;
        u32 check;
        u32 lbc;
        int ret;

        rtw89_pci_rxdma_prefth(rtwdev);
        rtw89_pci_l1off_pwroff(rtwdev);
        rtw89_pci_deglitch_setting(rtwdev);
        ret = rtw89_pci_l2_rxen_lat(rtwdev);
        if (ret) {
                rtw89_err(rtwdev, "[ERR] pcie l2 rxen lat %d\n", ret);
                return ret;
        }

        rtw89_pci_aphy_pwrcut(rtwdev);
        rtw89_pci_hci_ldo(rtwdev);

        ret = rtw89_pci_auto_refclk_cal(rtwdev, false);
        if (ret) {
                rtw89_err(rtwdev, "[ERR] pcie autok fail %d\n", ret);
                return ret;
        }

        rtw89_pci_set_sic(rtwdev);
        rtw89_pci_set_dbg(rtwdev);

        if (rtwdev->chip->chip_id == RTL8852A)
                rtw89_write32_clr(rtwdev, R_AX_SYS_SDIO_CTRL,
                                  B_AX_PCIE_AUXCLK_GATE);

        lbc = rtw89_read32(rtwdev, R_AX_LBC_WATCHDOG);
        lbc = u32_replace_bits(lbc, RTW89_MAC_LBC_TMR_128US, B_AX_LBC_TIMER);
        lbc |= B_AX_LBC_FLAG | B_AX_LBC_EN;
        rtw89_write32(rtwdev, R_AX_LBC_WATCHDOG, lbc);

        rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1,
                          B_AX_PCIE_TXRST_KEEP_REG | B_AX_PCIE_RXRST_KEEP_REG);
        rtw89_write32_set(rtwdev, R_AX_PCIE_DMA_STOP1, B_AX_STOP_WPDMA);

        /* stop DMA activities */
        rtw89_pci_ctrl_dma_all(rtwdev, false);

        /* check PCI at idle state */
        check = B_AX_PCIEIO_BUSY | B_AX_PCIEIO_TX_BUSY | B_AX_PCIEIO_RX_BUSY;
        ret = read_poll_timeout(rtw89_read32, dma_busy, (dma_busy & check) == 0,
                                100, 3000, false, rtwdev, R_AX_PCIE_DMA_BUSY1);
        if (ret) {
                rtw89_err(rtwdev, "failed to poll io busy\n");
                return ret;
        }

        rtw89_pci_clr_idx_all(rtwdev);

        /* configure TX/RX op modes */
        rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_TX_TRUNC_MODE |
                                                       B_AX_RX_TRUNC_MODE);
        rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_RXBD_MODE);
        rtw89_write32_mask(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_PCIE_MAX_TXDMA_MASK, 7);
        rtw89_write32_mask(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_PCIE_MAX_RXDMA_MASK, 3);
        /* multi-tag mode */
        rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_LATENCY_CONTROL);
        rtw89_write32_mask(rtwdev, R_AX_PCIE_EXP_CTRL, B_AX_MAX_TAG_NUM,
                           RTW89_MAC_TAG_NUM_8);
        rtw89_write32_mask(rtwdev, R_AX_PCIE_INIT_CFG2, B_AX_WD_ITVL_IDLE,
                           RTW89_MAC_WD_DMA_INTVL_256NS);
        rtw89_write32_mask(rtwdev, R_AX_PCIE_INIT_CFG2, B_AX_WD_ITVL_ACT,
                           RTW89_MAC_WD_DMA_INTVL_256NS);

        /* fill TRX BD indexes */
        rtw89_pci_ops_reset(rtwdev);

        ret = rtw89_pci_rst_bdram_pcie(rtwdev);
        if (ret) {
                rtw89_warn(rtwdev, "reset bdram busy\n");
                return ret;
        }

        /* enable FW CMD queue to download firmware */
        rtw89_write32_set(rtwdev, R_AX_PCIE_DMA_STOP1, B_AX_TX_STOP1_ALL);
        rtw89_write32_clr(rtwdev, R_AX_PCIE_DMA_STOP1, B_AX_STOP_CH12);
        rtw89_write32_set(rtwdev, R_AX_PCIE_DMA_STOP2, B_AX_TX_STOP2_ALL);

        /* start DMA activities */
        rtw89_pci_ctrl_dma_all(rtwdev, true);

        return 0;
}

static int rtw89_pci_ltr_set(struct rtw89_dev *rtwdev)
{
        u32 val;

        val = rtw89_read32(rtwdev, R_AX_LTR_CTRL_0);
        if (rtw89_pci_ltr_is_err_reg_val(val))
                return -EINVAL;
        val = rtw89_read32(rtwdev, R_AX_LTR_CTRL_1);
        if (rtw89_pci_ltr_is_err_reg_val(val))
                return -EINVAL;
        val = rtw89_read32(rtwdev, R_AX_LTR_IDLE_LATENCY);
        if (rtw89_pci_ltr_is_err_reg_val(val))
                return -EINVAL;
        val = rtw89_read32(rtwdev, R_AX_LTR_ACTIVE_LATENCY);
        if (rtw89_pci_ltr_is_err_reg_val(val))
                return -EINVAL;

        rtw89_write32_clr(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_HW_EN);
        rtw89_write32_set(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_EN);
        rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_SPACE_IDX_MASK,
                           PCI_LTR_SPC_500US);
        rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_IDLE_TIMER_IDX_MASK,
                           PCI_LTR_IDLE_TIMER_800US);
        rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_1, B_AX_LTR_RX0_TH_MASK, 0x28);
        rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_1, B_AX_LTR_RX1_TH_MASK, 0x28);
        rtw89_write32(rtwdev, R_AX_LTR_IDLE_LATENCY, 0x88e088e0);
        rtw89_write32(rtwdev, R_AX_LTR_ACTIVE_LATENCY, 0x880b880b);

        return 0;
}

static int rtw89_pci_ops_mac_post_init(struct rtw89_dev *rtwdev)
{
        int ret;

        ret = rtw89_pci_ltr_set(rtwdev);
        if (ret) {
                rtw89_err(rtwdev, "pci ltr set fail\n");
                return ret;
        }
        if (rtwdev->chip->chip_id == RTL8852A) {
                /* ltr sw trigger */
                rtw89_write32_set(rtwdev, R_AX_LTR_CTRL_0, B_AX_APP_LTR_ACT);
        }
        /* ADDR info 8-byte mode */
        rtw89_write32_set(rtwdev, R_AX_TX_ADDRESS_INFO_MODE_SETTING,
                          B_AX_HOST_ADDR_INFO_8B_SEL);
        rtw89_write32_clr(rtwdev, R_AX_PKTIN_SETTING, B_AX_WD_ADDR_INFO_LENGTH);

        /* enable DMA for all queues */
        rtw89_write32_clr(rtwdev, R_AX_PCIE_DMA_STOP1, B_AX_TX_STOP1_ALL);
        rtw89_write32_clr(rtwdev, R_AX_PCIE_DMA_STOP2, B_AX_TX_STOP2_ALL);

        /* Release PCI IO */
        rtw89_write32_clr(rtwdev, R_AX_PCIE_DMA_STOP1,
                          B_AX_STOP_WPDMA | B_AX_STOP_PCIEIO);

        return 0;
}

static int rtw89_pci_claim_device(struct rtw89_dev *rtwdev,
                                  struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        int ret;

        ret = pci_enable_device(pdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to enable pci device\n");
                return ret;
        }

        pci_set_master(pdev);
        pci_set_drvdata(pdev, rtwdev->hw);

        rtwpci->pdev = pdev;

        return 0;
}

static void rtw89_pci_declaim_device(struct rtw89_dev *rtwdev,
                                     struct pci_dev *pdev)
{
        pci_clear_master(pdev);
        pci_disable_device(pdev);
}

static int rtw89_pci_setup_mapping(struct rtw89_dev *rtwdev,
                                   struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        unsigned long resource_len;
        u8 bar_id = 2;
        int ret;

        ret = pci_request_regions(pdev, KBUILD_MODNAME);
        if (ret) {
                rtw89_err(rtwdev, "failed to request pci regions\n");
                goto err;
        }

        ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
        if (ret) {
                rtw89_err(rtwdev, "failed to set dma mask to 32-bit\n");
                goto err_release_regions;
        }

        ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));

        if (ret) {
                rtw89_err(rtwdev, "failed to set consistent dma mask to 32-bit\n");
                goto err_release_regions;
        }

        resource_len = pci_resource_len(pdev, bar_id);
        rtwpci->mmap = pci_iomap(pdev, bar_id, resource_len);
        if (!rtwpci->mmap) {
                rtw89_err(rtwdev, "failed to map pci io\n");
                ret = -EIO;
                goto err_release_regions;
        }

        return 0;

err_release_regions:
        pci_release_regions(pdev);
err:
        return ret;
}

static void rtw89_pci_clear_mapping(struct rtw89_dev *rtwdev,
                                    struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;

        if (rtwpci->mmap) {
                pci_iounmap(pdev, rtwpci->mmap);
                pci_release_regions(pdev);
        }
}

static void rtw89_pci_free_tx_wd_ring(struct rtw89_dev *rtwdev,
                                      struct pci_dev *pdev,
                                      struct rtw89_pci_tx_ring *tx_ring)
{
        struct rtw89_pci_tx_wd_ring *wd_ring = &tx_ring->wd_ring;
        u8 *head = wd_ring->head;
        dma_addr_t dma = wd_ring->dma;
        u32 page_size = wd_ring->page_size;
        u32 page_num = wd_ring->page_num;
        u32 ring_sz = page_size * page_num;

        dma_free_coherent(&pdev->dev, ring_sz, head, dma);
        wd_ring->head = NULL;
}

static void rtw89_pci_free_tx_ring(struct rtw89_dev *rtwdev,
                                   struct pci_dev *pdev,
                                   struct rtw89_pci_tx_ring *tx_ring)
{
        int ring_sz;
        u8 *head;
        dma_addr_t dma;

        head = tx_ring->bd_ring.head;
        dma = tx_ring->bd_ring.dma;
        ring_sz = tx_ring->bd_ring.desc_size * tx_ring->bd_ring.len;
        dma_free_coherent(&pdev->dev, ring_sz, head, dma);

        tx_ring->bd_ring.head = NULL;
}

static void rtw89_pci_free_tx_rings(struct rtw89_dev *rtwdev,
                                    struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring;
        int i;

        for (i = 0; i < RTW89_TXCH_NUM; i++) {
                tx_ring = &rtwpci->tx_rings[i];
                rtw89_pci_free_tx_wd_ring(rtwdev, pdev, tx_ring);
                rtw89_pci_free_tx_ring(rtwdev, pdev, tx_ring);
        }
}

static void rtw89_pci_free_rx_ring(struct rtw89_dev *rtwdev,
                                   struct pci_dev *pdev,
                                   struct rtw89_pci_rx_ring *rx_ring)
{
        struct rtw89_pci_rx_info *rx_info;
        struct sk_buff *skb;
        dma_addr_t dma;
        u32 buf_sz;
        u8 *head;
        int ring_sz = rx_ring->bd_ring.desc_size * rx_ring->bd_ring.len;
        int i;

        buf_sz = rx_ring->buf_sz;
        for (i = 0; i < rx_ring->bd_ring.len; i++) {
                skb = rx_ring->buf[i];
                if (!skb)
                        continue;

                rx_info = RTW89_PCI_RX_SKB_CB(skb);
                dma = rx_info->dma;
                dma_unmap_single(&pdev->dev, dma, buf_sz, DMA_FROM_DEVICE);
                dev_kfree_skb(skb);
                rx_ring->buf[i] = NULL;
        }

        head = rx_ring->bd_ring.head;
        dma = rx_ring->bd_ring.dma;
        dma_free_coherent(&pdev->dev, ring_sz, head, dma);

        rx_ring->bd_ring.head = NULL;
}

static void rtw89_pci_free_rx_rings(struct rtw89_dev *rtwdev,
                                    struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_rx_ring *rx_ring;
        int i;

        for (i = 0; i < RTW89_RXCH_NUM; i++) {
                rx_ring = &rtwpci->rx_rings[i];
                rtw89_pci_free_rx_ring(rtwdev, pdev, rx_ring);
        }
}

static void rtw89_pci_free_trx_rings(struct rtw89_dev *rtwdev,
                                     struct pci_dev *pdev)
{
        rtw89_pci_free_rx_rings(rtwdev, pdev);
        rtw89_pci_free_tx_rings(rtwdev, pdev);
}

static int rtw89_pci_init_rx_bd(struct rtw89_dev *rtwdev, struct pci_dev *pdev,
                                struct rtw89_pci_rx_ring *rx_ring,
                                struct sk_buff *skb, int buf_sz, u32 idx)
{
        struct rtw89_pci_rx_info *rx_info;
        struct rtw89_pci_rx_bd_32 *rx_bd;
        dma_addr_t dma;

        if (!skb)
                return -EINVAL;

        dma = dma_map_single(&pdev->dev, skb->data, buf_sz, DMA_FROM_DEVICE);
        if (dma_mapping_error(&pdev->dev, dma))
                return -EBUSY;

        rx_info = RTW89_PCI_RX_SKB_CB(skb);
        rx_bd = RTW89_PCI_RX_BD(rx_ring, idx);

        memset(rx_bd, 0, sizeof(*rx_bd));
        rx_bd->buf_size = cpu_to_le16(buf_sz);
        rx_bd->dma = cpu_to_le32(dma);
        rx_info->dma = dma;

        return 0;
}

static int rtw89_pci_alloc_tx_wd_ring(struct rtw89_dev *rtwdev,
                                      struct pci_dev *pdev,
                                      struct rtw89_pci_tx_ring *tx_ring,
                                      enum rtw89_tx_channel txch)
{
        struct rtw89_pci_tx_wd_ring *wd_ring = &tx_ring->wd_ring;
        struct rtw89_pci_tx_wd *txwd;
        dma_addr_t dma;
        dma_addr_t cur_paddr;
        u8 *head;
        u8 *cur_vaddr;
        u32 page_size = RTW89_PCI_TXWD_PAGE_SIZE;
        u32 page_num = RTW89_PCI_TXWD_NUM_MAX;
        u32 ring_sz = page_size * page_num;
        u32 page_offset;
        int i;

        /* FWCMD queue doesn't use txwd as pages */
        if (txch == RTW89_TXCH_CH12)
                return 0;

        head = dma_alloc_coherent(&pdev->dev, ring_sz, &dma, GFP_KERNEL);
        if (!head)
                return -ENOMEM;

        INIT_LIST_HEAD(&wd_ring->free_pages);
        wd_ring->head = head;
        wd_ring->dma = dma;
        wd_ring->page_size = page_size;
        wd_ring->page_num = page_num;

        page_offset = 0;
        for (i = 0; i < page_num; i++) {
                txwd = &wd_ring->pages[i];
                cur_paddr = dma + page_offset;
                cur_vaddr = head + page_offset;

                skb_queue_head_init(&txwd->queue);
                INIT_LIST_HEAD(&txwd->list);
                txwd->paddr = cur_paddr;
                txwd->vaddr = cur_vaddr;
                txwd->len = page_size;
                txwd->seq = i;
                rtw89_pci_enqueue_txwd(tx_ring, txwd);

                page_offset += page_size;
        }

        return 0;
}

static int rtw89_pci_alloc_tx_ring(struct rtw89_dev *rtwdev,
                                   struct pci_dev *pdev,
                                   struct rtw89_pci_tx_ring *tx_ring,
                                   u32 desc_size, u32 len,
                                   enum rtw89_tx_channel txch)
{
        int ring_sz = desc_size * len;
        u8 *head;
        dma_addr_t dma;
        u32 addr_num;
        u32 addr_idx;
        u32 addr_bdram;
        u32 addr_desa_l;
        u32 addr_desa_h;
        int ret;

        ret = rtw89_pci_alloc_tx_wd_ring(rtwdev, pdev, tx_ring, txch);
        if (ret) {
                rtw89_err(rtwdev, "failed to alloc txwd ring of txch %d\n", txch);
                goto err;
        }

        ret = rtw89_pci_get_txch_addrs(txch, &addr_num, &addr_idx, &addr_bdram,
                                       &addr_desa_l, &addr_desa_h);
        if (ret) {
                rtw89_err(rtwdev, "failed to get address of txch %d", txch);
                goto err_free_wd_ring;
        }

        head = dma_alloc_coherent(&pdev->dev, ring_sz, &dma, GFP_KERNEL);
        if (!head) {
                ret = -ENOMEM;
                goto err_free_wd_ring;
        }

        INIT_LIST_HEAD(&tx_ring->busy_pages);
        tx_ring->bd_ring.head = head;
        tx_ring->bd_ring.dma = dma;
        tx_ring->bd_ring.len = len;
        tx_ring->bd_ring.desc_size = desc_size;
        tx_ring->bd_ring.addr_num = addr_num;
        tx_ring->bd_ring.addr_idx = addr_idx;
        tx_ring->bd_ring.addr_bdram = addr_bdram;
        tx_ring->bd_ring.addr_desa_l = addr_desa_l;
        tx_ring->bd_ring.addr_desa_h = addr_desa_h;
        tx_ring->bd_ring.wp = 0;
        tx_ring->bd_ring.rp = 0;
        tx_ring->txch = txch;

        return 0;

err_free_wd_ring:
        rtw89_pci_free_tx_wd_ring(rtwdev, pdev, tx_ring);
err:
        return ret;
}

static int rtw89_pci_alloc_tx_rings(struct rtw89_dev *rtwdev,
                                    struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_tx_ring *tx_ring;
        u32 desc_size;
        u32 len;
        u32 i, tx_allocated;
        int ret;

        for (i = 0; i < RTW89_TXCH_NUM; i++) {
                tx_ring = &rtwpci->tx_rings[i];
                desc_size = sizeof(struct rtw89_pci_tx_bd_32);
                len = RTW89_PCI_TXBD_NUM_MAX;
                ret = rtw89_pci_alloc_tx_ring(rtwdev, pdev, tx_ring,
                                              desc_size, len, i);
                if (ret) {
                        rtw89_err(rtwdev, "failed to alloc tx ring %d\n", i);
                        goto err_free;
                }
        }

        return 0;

err_free:
        tx_allocated = i;
        for (i = 0; i < tx_allocated; i++) {
                tx_ring = &rtwpci->tx_rings[i];
                rtw89_pci_free_tx_ring(rtwdev, pdev, tx_ring);
        }

        return ret;
}

static int rtw89_pci_alloc_rx_ring(struct rtw89_dev *rtwdev,
                                   struct pci_dev *pdev,
                                   struct rtw89_pci_rx_ring *rx_ring,
                                   u32 desc_size, u32 len, u32 rxch)
{
        struct sk_buff *skb;
        u8 *head;
        dma_addr_t dma;
        u32 addr_num;
        u32 addr_idx;
        u32 addr_desa_l;
        u32 addr_desa_h;
        int ring_sz = desc_size * len;
        int buf_sz = RTW89_PCI_RX_BUF_SIZE;
        int i, allocated;
        int ret;

        ret = rtw89_pci_get_rxch_addrs(rxch, &addr_num, &addr_idx,
                                       &addr_desa_l, &addr_desa_h);
        if (ret) {
                rtw89_err(rtwdev, "failed to get address of rxch %d", rxch);
                return ret;
        }

        head = dma_alloc_coherent(&pdev->dev, ring_sz, &dma, GFP_KERNEL);
        if (!head) {
                ret = -ENOMEM;
                goto err;
        }

        rx_ring->bd_ring.head = head;
        rx_ring->bd_ring.dma = dma;
        rx_ring->bd_ring.len = len;
        rx_ring->bd_ring.desc_size = desc_size;
        rx_ring->bd_ring.addr_num = addr_num;
        rx_ring->bd_ring.addr_idx = addr_idx;
        rx_ring->bd_ring.addr_desa_l = addr_desa_l;
        rx_ring->bd_ring.addr_desa_h = addr_desa_h;
        rx_ring->bd_ring.wp = 0;
        rx_ring->bd_ring.rp = 0;
        rx_ring->buf_sz = buf_sz;
        rx_ring->diliver_skb = NULL;
        rx_ring->diliver_desc.ready = false;

        for (i = 0; i < len; i++) {
                skb = dev_alloc_skb(buf_sz);
                if (!skb) {
                        ret = -ENOMEM;
                        goto err_free;
                }

                memset(skb->data, 0, buf_sz);
                rx_ring->buf[i] = skb;
                ret = rtw89_pci_init_rx_bd(rtwdev, pdev, rx_ring, skb,
                                           buf_sz, i);
                if (ret) {
                        rtw89_err(rtwdev, "failed to init rx buf %d\n", i);
                        dev_kfree_skb_any(skb);
                        rx_ring->buf[i] = NULL;
                        goto err_free;
                }
        }

        return 0;

err_free:
        allocated = i;
        for (i = 0; i < allocated; i++) {
                skb = rx_ring->buf[i];
                if (!skb)
                        continue;
                dma = *((dma_addr_t *)skb->cb);
                dma_unmap_single(&pdev->dev, dma, buf_sz, DMA_FROM_DEVICE);
                dev_kfree_skb(skb);
                rx_ring->buf[i] = NULL;
        }

        head = rx_ring->bd_ring.head;
        dma = rx_ring->bd_ring.dma;
        dma_free_coherent(&pdev->dev, ring_sz, head, dma);

        rx_ring->bd_ring.head = NULL;
err:
        return ret;
}

static int rtw89_pci_alloc_rx_rings(struct rtw89_dev *rtwdev,
                                    struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct rtw89_pci_rx_ring *rx_ring;
        u32 desc_size;
        u32 len;
        int i, rx_allocated;
        int ret;

        for (i = 0; i < RTW89_RXCH_NUM; i++) {
                rx_ring = &rtwpci->rx_rings[i];
                desc_size = sizeof(struct rtw89_pci_rx_bd_32);
                len = RTW89_PCI_RXBD_NUM_MAX;
                ret = rtw89_pci_alloc_rx_ring(rtwdev, pdev, rx_ring,
                                              desc_size, len, i);
                if (ret) {
                        rtw89_err(rtwdev, "failed to alloc rx ring %d\n", i);
                        goto err_free;
                }
        }

        return 0;

err_free:
        rx_allocated = i;
        for (i = 0; i < rx_allocated; i++) {
                rx_ring = &rtwpci->rx_rings[i];
                rtw89_pci_free_rx_ring(rtwdev, pdev, rx_ring);
        }

        return ret;
}

static int rtw89_pci_alloc_trx_rings(struct rtw89_dev *rtwdev,
                                     struct pci_dev *pdev)
{
        int ret;

        ret = rtw89_pci_alloc_tx_rings(rtwdev, pdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to alloc dma tx rings\n");
                goto err;
        }

        ret = rtw89_pci_alloc_rx_rings(rtwdev, pdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to alloc dma rx rings\n");
                goto err_free_tx_rings;
        }

        return 0;

err_free_tx_rings:
        rtw89_pci_free_tx_rings(rtwdev, pdev);
err:
        return ret;
}

static void rtw89_pci_h2c_init(struct rtw89_dev *rtwdev,
                               struct rtw89_pci *rtwpci)
{
        skb_queue_head_init(&rtwpci->h2c_queue);
        skb_queue_head_init(&rtwpci->h2c_release_queue);
}

static int rtw89_pci_setup_resource(struct rtw89_dev *rtwdev,
                                    struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        int ret;

        ret = rtw89_pci_setup_mapping(rtwdev, pdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to setup pci mapping\n");
                goto err;
        }

        ret = rtw89_pci_alloc_trx_rings(rtwdev, pdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to alloc pci trx rings\n");
                goto err_pci_unmap;
        }

        rtw89_pci_h2c_init(rtwdev, rtwpci);

        spin_lock_init(&rtwpci->irq_lock);
        spin_lock_init(&rtwpci->trx_lock);

        return 0;

err_pci_unmap:
        rtw89_pci_clear_mapping(rtwdev, pdev);
err:
        return ret;
}

static void rtw89_pci_clear_resource(struct rtw89_dev *rtwdev,
                                     struct pci_dev *pdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;

        rtw89_pci_free_trx_rings(rtwdev, pdev);
        rtw89_pci_clear_mapping(rtwdev, pdev);
        rtw89_pci_release_fwcmd(rtwdev, rtwpci,
                                skb_queue_len(&rtwpci->h2c_queue), true);
}

static void rtw89_pci_default_intr_mask(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;

        rtwpci->halt_c2h_intrs = B_AX_HALT_C2H_INT_EN | 0;
        rtwpci->intrs[0] = B_AX_TXDMA_STUCK_INT_EN |
                           B_AX_RXDMA_INT_EN |
                           B_AX_RXP1DMA_INT_EN |
                           B_AX_RPQDMA_INT_EN |
                           B_AX_RXDMA_STUCK_INT_EN |
                           B_AX_RDU_INT_EN |
                           B_AX_RPQBD_FULL_INT_EN |
                           B_AX_HS0ISR_IND_INT_EN;

        rtwpci->intrs[1] = B_AX_HC10ISR_IND_INT_EN;
}

static int rtw89_pci_request_irq(struct rtw89_dev *rtwdev,
                                 struct pci_dev *pdev)
{
        unsigned long flags = 0;
        int ret;

        flags |= PCI_IRQ_LEGACY | PCI_IRQ_MSI;
        ret = pci_alloc_irq_vectors(pdev, 1, 1, flags);
        if (ret < 0) {
                rtw89_err(rtwdev, "failed to alloc irq vectors, ret %d\n", ret);
                goto err;
        }

        ret = devm_request_threaded_irq(rtwdev->dev, pdev->irq,
                                        rtw89_pci_interrupt_handler,
                                        rtw89_pci_interrupt_threadfn,
                                        IRQF_SHARED, KBUILD_MODNAME, rtwdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to request threaded irq\n");
                goto err_free_vector;
        }

        rtw89_pci_default_intr_mask(rtwdev);

        return 0;

err_free_vector:
        pci_free_irq_vectors(pdev);
err:
        return ret;
}

static void rtw89_pci_free_irq(struct rtw89_dev *rtwdev,
                               struct pci_dev *pdev)
{
        devm_free_irq(rtwdev->dev, pdev->irq, rtwdev);
        pci_free_irq_vectors(pdev);
}

static void rtw89_pci_clkreq_set(struct rtw89_dev *rtwdev, bool enable)
{
        int ret;

        if (rtw89_pci_disable_clkreq)
                return;

        ret = rtw89_dbi_write8(rtwdev, RTW89_PCIE_CLK_CTRL,
                               PCIE_CLKDLY_HW_30US);
        if (ret)
                rtw89_err(rtwdev, "failed to set CLKREQ Delay\n");

        if (enable)
                ret = rtw89_dbi_write8_set(rtwdev, RTW89_PCIE_L1_CTRL,
                                           RTW89_PCIE_BIT_CLK);
        else
                ret = rtw89_dbi_write8_clr(rtwdev, RTW89_PCIE_L1_CTRL,
                                           RTW89_PCIE_BIT_CLK);
        if (ret)
                rtw89_err(rtwdev, "failed to %s CLKREQ_L1, ret=%d",
                          enable ? "set" : "unset", ret);
}

static void rtw89_pci_aspm_set(struct rtw89_dev *rtwdev, bool enable)
{
        u8 value = 0;
        int ret;

        if (rtw89_pci_disable_aspm_l1)
                return;

        ret = rtw89_dbi_read8(rtwdev, RTW89_PCIE_ASPM_CTRL, &value);
        if (ret)
                rtw89_err(rtwdev, "failed to read ASPM Delay\n");

        value &= ~(RTW89_L1DLY_MASK | RTW89_L0DLY_MASK);
        value |= FIELD_PREP(RTW89_L1DLY_MASK, PCIE_L1DLY_16US) |
                 FIELD_PREP(RTW89_L0DLY_MASK, PCIE_L0SDLY_4US);

        ret = rtw89_dbi_write8(rtwdev, RTW89_PCIE_ASPM_CTRL, value);
        if (ret)
                rtw89_err(rtwdev, "failed to read ASPM Delay\n");

        if (enable)
                ret = rtw89_dbi_write8_set(rtwdev, RTW89_PCIE_L1_CTRL,
                                           RTW89_PCIE_BIT_L1);
        else
                ret = rtw89_dbi_write8_clr(rtwdev, RTW89_PCIE_L1_CTRL,
                                           RTW89_PCIE_BIT_L1);
        if (ret)
                rtw89_err(rtwdev, "failed to %s ASPM L1, ret=%d",
                          enable ? "set" : "unset", ret);
}

static void rtw89_pci_recalc_int_mit(struct rtw89_dev *rtwdev)
{
        struct rtw89_traffic_stats *stats = &rtwdev->stats;
        enum rtw89_tfc_lv tx_tfc_lv = stats->tx_tfc_lv;
        enum rtw89_tfc_lv rx_tfc_lv = stats->rx_tfc_lv;
        u32 val = 0;

        if (!rtwdev->scanning &&
            (tx_tfc_lv >= RTW89_TFC_HIGH || rx_tfc_lv >= RTW89_TFC_HIGH))
                val = B_AX_RXMIT_RXP2_SEL | B_AX_RXMIT_RXP1_SEL |
                      FIELD_PREP(B_AX_RXCOUNTER_MATCH_MASK, RTW89_PCI_RXBD_NUM_MAX / 2) |
                      FIELD_PREP(B_AX_RXTIMER_UNIT_MASK, AX_RXTIMER_UNIT_64US) |
                      FIELD_PREP(B_AX_RXTIMER_MATCH_MASK, 2048 / 64);

        rtw89_write32(rtwdev, R_AX_INT_MIT_RX, val);
}

static void rtw89_pci_link_cfg(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct pci_dev *pdev = rtwpci->pdev;
        u16 link_ctrl;
        int ret;

        /* Though there is standard PCIE configuration space to set the
         * link control register, but by Realtek's design, driver should
         * check if host supports CLKREQ/ASPM to enable the HW module.
         *
         * These functions are implemented by two HW modules associated,
         * one is responsible to access PCIE configuration space to
         * follow the host settings, and another is in charge of doing
         * CLKREQ/ASPM mechanisms, it is default disabled. Because sometimes
         * the host does not support it, and due to some reasons or wrong
         * settings (ex. CLKREQ# not Bi-Direction), it could lead to device
         * loss if HW misbehaves on the link.
         *
         * Hence it's designed that driver should first check the PCIE
         * configuration space is sync'ed and enabled, then driver can turn
         * on the other module that is actually working on the mechanism.
         */
        ret = pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &link_ctrl);
        if (ret) {
                rtw89_err(rtwdev, "failed to read PCI cap, ret=%d\n", ret);
                return;
        }

        if (link_ctrl & PCI_EXP_LNKCTL_CLKREQ_EN)
                rtw89_pci_clkreq_set(rtwdev, true);

        if (link_ctrl & PCI_EXP_LNKCTL_ASPM_L1)
                rtw89_pci_aspm_set(rtwdev, true);
}

static void rtw89_pci_l1ss_set(struct rtw89_dev *rtwdev, bool enable)
{
        int ret;

        if (enable)
                ret = rtw89_dbi_write8_set(rtwdev, RTW89_PCIE_TIMER_CTRL,
                                           RTW89_PCIE_BIT_L1SUB);
        else
                ret = rtw89_dbi_write8_clr(rtwdev, RTW89_PCIE_TIMER_CTRL,
                                           RTW89_PCIE_BIT_L1SUB);
        if (ret)
                rtw89_err(rtwdev, "failed to %s L1SS, ret=%d",
                          enable ? "set" : "unset", ret);
}

static void rtw89_pci_l1ss_cfg(struct rtw89_dev *rtwdev)
{
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        struct pci_dev *pdev = rtwpci->pdev;
        u32 l1ss_cap_ptr, l1ss_ctrl;

        if (rtw89_pci_disable_l1ss)
                return;

        l1ss_cap_ptr = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_L1SS);
        if (!l1ss_cap_ptr)
                return;

        pci_read_config_dword(pdev, l1ss_cap_ptr + PCI_L1SS_CTL1, &l1ss_ctrl);

        if (l1ss_ctrl & PCI_L1SS_CTL1_L1SS_MASK)
                rtw89_pci_l1ss_set(rtwdev, true);
}

static void rtw89_pci_ctrl_dma_all_pcie(struct rtw89_dev *rtwdev, u8 en)
{
        u32 val32;

        if (en == MAC_AX_FUNC_EN) {
                val32 = B_AX_STOP_PCIEIO;
                rtw89_write32_clr(rtwdev, R_AX_PCIE_DMA_STOP1, val32);

                val32 = B_AX_TXHCI_EN | B_AX_RXHCI_EN;
                rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1, val32);
        } else {
                val32 = B_AX_STOP_PCIEIO;
                rtw89_write32_set(rtwdev, R_AX_PCIE_DMA_STOP1, val32);

                val32 = B_AX_TXHCI_EN | B_AX_RXHCI_EN;
                rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1, val32);
        }
}

static int rtw89_pci_poll_io_idle(struct rtw89_dev *rtwdev)
{
        int ret = 0;
        u32 sts;
        u32 busy = B_AX_PCIEIO_BUSY | B_AX_PCIEIO_TX_BUSY | B_AX_PCIEIO_RX_BUSY;

        ret = read_poll_timeout_atomic(rtw89_read32, sts, (sts & busy) == 0x0,
                                       10, 1000, false, rtwdev,
                                       R_AX_PCIE_DMA_BUSY1);
        if (ret) {
                rtw89_err(rtwdev, "pci dmach busy1 0x%X\n",
                          rtw89_read32(rtwdev, R_AX_PCIE_DMA_BUSY1));
                return -EINVAL;
        }
        return ret;
}

static int rtw89_pci_lv1rst_stop_dma(struct rtw89_dev *rtwdev)
{
        u32 val, dma_rst = 0;
        int ret;

        rtw89_pci_ctrl_dma_all_pcie(rtwdev, MAC_AX_FUNC_DIS);
        ret = rtw89_pci_poll_io_idle(rtwdev);
        if (ret) {
                val = rtw89_read32(rtwdev, R_AX_DBG_ERR_FLAG);
                rtw89_debug(rtwdev, RTW89_DBG_HCI,
                            "[PCIe] poll_io_idle fail, before 0x%08x: 0x%08x\n",
                            R_AX_DBG_ERR_FLAG, val);
                if (val & B_AX_TX_STUCK || val & B_AX_PCIE_TXBD_LEN0)
                        dma_rst |= B_AX_HCI_TXDMA_EN;
                if (val & B_AX_RX_STUCK)
                        dma_rst |= B_AX_HCI_RXDMA_EN;
                val = rtw89_read32(rtwdev, R_AX_HCI_FUNC_EN);
                rtw89_write32(rtwdev, R_AX_HCI_FUNC_EN, val & ~dma_rst);
                rtw89_write32(rtwdev, R_AX_HCI_FUNC_EN, val | dma_rst);
                ret = rtw89_pci_poll_io_idle(rtwdev);
                val = rtw89_read32(rtwdev, R_AX_DBG_ERR_FLAG);
                rtw89_debug(rtwdev, RTW89_DBG_HCI,
                            "[PCIe] poll_io_idle fail, after 0x%08x: 0x%08x\n",
                            R_AX_DBG_ERR_FLAG, val);
        }

        return ret;
}

static void rtw89_pci_ctrl_hci_dma_en(struct rtw89_dev *rtwdev, u8 en)
{
        u32 val32;

        if (en == MAC_AX_FUNC_EN) {
                val32 = B_AX_HCI_TXDMA_EN | B_AX_HCI_RXDMA_EN;
                rtw89_write32_set(rtwdev, R_AX_HCI_FUNC_EN, val32);
        } else {
                val32 = B_AX_HCI_TXDMA_EN | B_AX_HCI_RXDMA_EN;
                rtw89_write32_clr(rtwdev, R_AX_HCI_FUNC_EN, val32);
        }
}

static int rtw89_pci_rst_bdram(struct rtw89_dev *rtwdev)
{
        int ret = 0;
        u32 val32, sts;

        val32 = B_AX_RST_BDRAM;
        rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1, val32);

        ret = read_poll_timeout_atomic(rtw89_read32, sts,
                                       (sts & B_AX_RST_BDRAM) == 0x0, 1, 100,
                                       true, rtwdev, R_AX_PCIE_INIT_CFG1);
        return ret;
}

static int rtw89_pci_lv1rst_start_dma(struct rtw89_dev *rtwdev)
{
        u32 ret;

        rtw89_pci_ctrl_hci_dma_en(rtwdev, MAC_AX_FUNC_DIS);
        rtw89_pci_ctrl_hci_dma_en(rtwdev, MAC_AX_FUNC_EN);
        rtw89_pci_clr_idx_all(rtwdev);

        ret = rtw89_pci_rst_bdram(rtwdev);
        if (ret)
                return ret;

        rtw89_pci_ctrl_dma_all_pcie(rtwdev, MAC_AX_FUNC_EN);
        return ret;
}

static int rtw89_pci_ops_mac_lv1_recovery(struct rtw89_dev *rtwdev,
                                          enum rtw89_lv1_rcvy_step step)
{
        int ret;

        switch (step) {
        case RTW89_LV1_RCVY_STEP_1:
                ret = rtw89_pci_lv1rst_stop_dma(rtwdev);
                if (ret)
                        rtw89_err(rtwdev, "lv1 rcvy pci stop dma fail\n");

                break;

        case RTW89_LV1_RCVY_STEP_2:
                ret = rtw89_pci_lv1rst_start_dma(rtwdev);
                if (ret)
                        rtw89_err(rtwdev, "lv1 rcvy pci start dma fail\n");
                break;

        default:
                return -EINVAL;
        }

        return ret;
}

static void rtw89_pci_ops_dump_err_status(struct rtw89_dev *rtwdev)
{
        rtw89_info(rtwdev, "R_AX_RPQ_RXBD_IDX =0x%08x\n",
                   rtw89_read32(rtwdev, R_AX_RPQ_RXBD_IDX));
        rtw89_info(rtwdev, "R_AX_DBG_ERR_FLAG=0x%08x\n",
                   rtw89_read32(rtwdev, R_AX_DBG_ERR_FLAG));
        rtw89_info(rtwdev, "R_AX_LBC_WATCHDOG=0x%08x\n",
                   rtw89_read32(rtwdev, R_AX_LBC_WATCHDOG));
}

static int rtw89_pci_napi_poll(struct napi_struct *napi, int budget)
{
        struct rtw89_dev *rtwdev = container_of(napi, struct rtw89_dev, napi);
        struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
        unsigned long flags;
        int work_done;

        rtwdev->napi_budget_countdown = budget;

        rtw89_pci_clear_isr0(rtwdev, B_AX_RPQDMA_INT | B_AX_RPQBD_FULL_INT);
        work_done = rtw89_pci_poll_rpq_dma(rtwdev, rtwpci, rtwdev->napi_budget_countdown);
        if (work_done == budget)
                return budget;

        rtw89_pci_clear_isr0(rtwdev, B_AX_RXP1DMA_INT | B_AX_RXDMA_INT | B_AX_RDU_INT);
        work_done += rtw89_pci_poll_rxq_dma(rtwdev, rtwpci, rtwdev->napi_budget_countdown);
        if (work_done < budget && napi_complete_done(napi, work_done)) {
                spin_lock_irqsave(&rtwpci->irq_lock, flags);
                if (likely(rtwpci->running))
                        rtw89_pci_enable_intr(rtwdev, rtwpci);
                spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
        }

        return work_done;
}

static int __maybe_unused rtw89_pci_suspend(struct device *dev)
{
        struct ieee80211_hw *hw = dev_get_drvdata(dev);
        struct rtw89_dev *rtwdev = hw->priv;

        rtw89_write32_clr(rtwdev, R_AX_SYS_SDIO_CTRL,
                          B_AX_PCIE_DIS_L2_CTRL_LDO_HCI);
        rtw89_write32_set(rtwdev, R_AX_RSV_CTRL, B_AX_WLOCK_1C_BIT6);
        rtw89_write32_set(rtwdev, R_AX_RSV_CTRL, B_AX_R_DIS_PRST);
        rtw89_write32_clr(rtwdev, R_AX_RSV_CTRL, B_AX_WLOCK_1C_BIT6);
        rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1,
                          B_AX_PCIE_PERST_KEEP_REG | B_AX_PCIE_TRAIN_KEEP_REG);

        return 0;
}

static void rtw89_pci_l2_hci_ldo(struct rtw89_dev *rtwdev)
{
        if (rtwdev->chip->chip_id == RTL8852C)
                return;

        /* Hardware need write the reg twice to ensure the setting work */
        rtw89_dbi_write8_set(rtwdev, RTW89_PCIE_RST_MSTATE,
                             RTW89_PCIE_BIT_CFG_RST_MSTATE);
        rtw89_dbi_write8_set(rtwdev, RTW89_PCIE_RST_MSTATE,
                             RTW89_PCIE_BIT_CFG_RST_MSTATE);
}

static int __maybe_unused rtw89_pci_resume(struct device *dev)
{
        struct ieee80211_hw *hw = dev_get_drvdata(dev);
        struct rtw89_dev *rtwdev = hw->priv;

        rtw89_write32_set(rtwdev, R_AX_SYS_SDIO_CTRL,
                          B_AX_PCIE_DIS_L2_CTRL_LDO_HCI);
        rtw89_write32_set(rtwdev, R_AX_RSV_CTRL, B_AX_WLOCK_1C_BIT6);
        rtw89_write32_clr(rtwdev, R_AX_RSV_CTRL, B_AX_R_DIS_PRST);
        rtw89_write32_clr(rtwdev, R_AX_RSV_CTRL, B_AX_WLOCK_1C_BIT6);
        rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1,
                          B_AX_PCIE_PERST_KEEP_REG | B_AX_PCIE_TRAIN_KEEP_REG);
        rtw89_pci_l2_hci_ldo(rtwdev);
        rtw89_pci_link_cfg(rtwdev);
        rtw89_pci_l1ss_cfg(rtwdev);

        return 0;
}

SIMPLE_DEV_PM_OPS(rtw89_pm_ops, rtw89_pci_suspend, rtw89_pci_resume);
EXPORT_SYMBOL(rtw89_pm_ops);

static const struct rtw89_hci_ops rtw89_pci_ops = {
        .tx_write       = rtw89_pci_ops_tx_write,
        .tx_kick_off    = rtw89_pci_ops_tx_kick_off,
        .flush_queues   = rtw89_pci_ops_flush_queues,
        .reset          = rtw89_pci_ops_reset,
        .start          = rtw89_pci_ops_start,
        .stop           = rtw89_pci_ops_stop,
        .recalc_int_mit = rtw89_pci_recalc_int_mit,

        .read8          = rtw89_pci_ops_read8,
        .read16         = rtw89_pci_ops_read16,
        .read32         = rtw89_pci_ops_read32,
        .write8         = rtw89_pci_ops_write8,
        .write16        = rtw89_pci_ops_write16,
        .write32        = rtw89_pci_ops_write32,

        .mac_pre_init   = rtw89_pci_ops_mac_pre_init,
        .mac_post_init  = rtw89_pci_ops_mac_post_init,
        .deinit         = rtw89_pci_ops_deinit,

        .check_and_reclaim_tx_resource = rtw89_pci_check_and_reclaim_tx_resource,
        .mac_lv1_rcvy   = rtw89_pci_ops_mac_lv1_recovery,
        .dump_err_status = rtw89_pci_ops_dump_err_status,
        .napi_poll      = rtw89_pci_napi_poll,
};

static int rtw89_pci_probe(struct pci_dev *pdev,
                           const struct pci_device_id *id)
{
        struct ieee80211_hw *hw;
        struct rtw89_dev *rtwdev;
        int driver_data_size;
        int ret;

        driver_data_size = sizeof(struct rtw89_dev) + sizeof(struct rtw89_pci);
        hw = ieee80211_alloc_hw(driver_data_size, &rtw89_ops);
        if (!hw) {
                dev_err(&pdev->dev, "failed to allocate hw\n");
                return -ENOMEM;
        }

        rtwdev = hw->priv;
        rtwdev->hw = hw;
        rtwdev->dev = &pdev->dev;
        rtwdev->hci.ops = &rtw89_pci_ops;
        rtwdev->hci.type = RTW89_HCI_TYPE_PCIE;
        rtwdev->hci.rpwm_addr = R_AX_PCIE_HRPWM;
        rtwdev->hci.cpwm_addr = R_AX_CPWM;

        SET_IEEE80211_DEV(rtwdev->hw, &pdev->dev);

        switch (id->driver_data) {
        case RTL8852A:
                rtwdev->chip = &rtw8852a_chip_info;
                break;
        default:
                return -ENOENT;
        }

        ret = rtw89_core_init(rtwdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to initialise core\n");
                goto err_release_hw;
        }

        ret = rtw89_pci_claim_device(rtwdev, pdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to claim pci device\n");
                goto err_core_deinit;
        }

        ret = rtw89_pci_setup_resource(rtwdev, pdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to setup pci resource\n");
                goto err_declaim_pci;
        }

        ret = rtw89_chip_info_setup(rtwdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to setup chip information\n");
                goto err_clear_resource;
        }

        rtw89_pci_link_cfg(rtwdev);
        rtw89_pci_l1ss_cfg(rtwdev);

        ret = rtw89_core_register(rtwdev);
        if (ret) {
                rtw89_err(rtwdev, "failed to register core\n");
                goto err_clear_resource;
        }