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// 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;
u32 cnt;
rx_ring = &rtwpci->rx_rings[RTW89_RXCH_RXQ];
cnt = rtw89_pci_rxbd_recalc(rtwdev, rx_ring);
if (!cnt)
return 0;
rtwdev->napi_budget_countdown = budget;
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 - rtwdev->napi_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 void rtw89_pci_isr_rpq_dma(struct rtw89_dev *rtwdev,
struct rtw89_pci *rtwpci)
{
struct rtw89_pci_rx_ring *rx_ring;
u32 cnt;
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);
}
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;
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);
rtw89_warn(rtwdev, "%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_enable_intr(struct rtw89_dev *rtwdev,
struct rtw89_pci *rtwpci, bool exclude_rx)
{
//if (exclude_rx || test_bit(RTW89_PCI_FLAG_DOING_RX, rtwpci->flags))
// rtwpci->intrs[0] &= ~B_AX_RXDMA_INTS_MASK;
//else
rtwpci->intrs[0] |= B_AX_RXDMA_INTS_MASK;
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;
bool rx = false;
spin_lock_irqsave(&rtwpci->irq_lock, flags);
rtw89_pci_recognize_intrs(rtwdev, rtwpci, &isrs);
spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
/* RX ISR */
if (isrs.isrs[0] & (B_AX_RXDMA_INT | B_AX_RXP1DMA_INT))
rx = true;
if (isrs.isrs[0] & B_AX_RPQDMA_INT)
rtw89_pci_isr_rpq_dma(rtwdev, rtwpci);
if (isrs.isrs[0] & B_AX_RDU_INT) {
rtw89_pci_isr_rxd_unavail(rtwdev, rtwpci);
rx = true;
}
if (isrs.halt_c2h_isrs & B_AX_HALT_C2H_INT_EN)
rtw89_ser_notify(rtwdev, rtw89_mac_get_err_status(rtwdev));
spin_lock_irqsave(&rtwpci->irq_lock, flags);
if (likely(rtwpci->running))
rtw89_pci_enable_intr(rtwdev, rtwpci, rx);
spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
if (likely(rtwpci->running) && rx) {
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;
clear_bit(RTW89_PCI_FLAG_DOING_RX, rtwpci->flags);
rtw89_pci_enable_intr(rtwdev, rtwpci, false);
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)
{
rtw89_pci_free_trx_rings(rtwdev, pdev);
rtw89_pci_clear_mapping(rtwdev, pdev);
}
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;
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)
{
int ret;
if (rtw89_pci_disable_aspm_l1)
return;
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_link_ps(struct rtw89_dev *rtwdev, bool enter)
{
struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
/* Like CLKREQ, ASPM is also implemented by two HW modules, and can
* only be enabled when host supports it.
*
* And ASPM mechanism should be enabled when driver/firmware enters
* power save mode, without having heavy traffic. Because we've
* experienced some inter-operability issues that the link tends
* to enter L1 state on the fly even when driver is having high
* throughput. This is probably because the ASPM behavior slightly
* varies from different SOC.
*/
if (rtwpci->link_ctrl & PCI_EXP_LNKCTL_ASPM_L1)
rtw89_pci_aspm_set(rtwdev, enter);
}
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);
rtwpci->link_ctrl = link_ctrl;
}
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;
u32 cnt;
int ret;
set_bit(RTW89_PCI_FLAG_DOING_RX, rtwpci->flags);
ret = rtw89_pci_poll_rxq_dma(rtwdev, rtwpci, budget);
if (ret < budget) {
napi_complete_done(napi, ret);
cnt = rtw89_pci_rxbd_recalc(rtwdev, &rtwpci->rx_rings[RTW89_RXCH_RXQ]);
if (cnt && napi_reschedule(napi))
return ret;
spin_lock_irqsave(&rtwpci->irq_lock, flags);
clear_bit(RTW89_PCI_FLAG_DOING_RX, rtwpci->flags);
if (likely(rtwpci->running))
rtw89_pci_enable_intr(rtwdev, rtwpci, false);
spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
}
return ret;
}
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_B6);
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_B6);
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_B6);
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_B6);
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,
.link_ps = rtw89_pci_link_ps,
.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;
}
rtw89_core_napi_init(rtwdev);
ret = rtw89_pci_request_irq(rtwdev, pdev);
if (ret) {
rtw89_err(rtwdev, "failed to request pci irq\n");
goto err_unregister;
}
return 0;
err_unregister:
rtw89_core_napi_deinit(rtwdev);
rtw89_core_unregister(rtwdev);
err_clear_resource:
rtw89_pci_clear_resource(rtwdev, pdev);
err_declaim_pci:
rtw89_pci_declaim_device(rtwdev, pdev);
err_core_deinit:
rtw89_core_deinit(rtwdev);
err_release_hw:
ieee80211_free_hw(hw);
return ret;
}
static void rtw89_pci_remove(struct pci_dev *pdev)
{
struct ieee80211_hw *hw = pci_get_drvdata(pdev);
struct rtw89_dev *rtwdev;
rtwdev = hw->priv;
rtw89_pci_free_irq(rtwdev, pdev);
rtw89_core_napi_deinit(rtwdev);
rtw89_core_unregister(rtwdev);
rtw89_pci_clear_resource(rtwdev, pdev);
rtw89_pci_declaim_device(rtwdev, pdev);
rtw89_core_deinit(rtwdev);
ieee80211_free_hw(hw);
}
static const struct pci_device_id rtw89_pci_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8852), .driver_data = RTL8852A },
{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0xa85a), .driver_data = RTL8852A },
{},
};
MODULE_DEVICE_TABLE(pci, rtw89_pci_id_table);
static struct pci_driver rtw89_pci_driver = {
.name = "rtw89_pci",
.id_table = rtw89_pci_id_table,
.probe = rtw89_pci_probe,
.remove = rtw89_pci_remove,
.driver.pm = &rtw89_pm_ops,
};
module_pci_driver(rtw89_pci_driver);
MODULE_AUTHOR("Realtek Corporation");
MODULE_DESCRIPTION("Realtek 802.11ax wireless PCI driver");
MODULE_LICENSE("Dual BSD/GPL");
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