[RFC v2 03/12] rtw88: hci files

[<yhchuang@realtek.com>]

From: Yan-Hsuan Chuang <yhchuang@realtek.com>

hci files for Realtek 802.11ac wireless network chips

For now there is only PCI bus supported by rtwlan, in the future it
will also have USB/SDIO

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/hci.h |  212 ++++++
 drivers/net/wireless/realtek/rtw88/pci.c | 1220 ++++++++++++++++++++++++++++++
 drivers/net/wireless/realtek/rtw88/pci.h |  228 ++++++
 3 files changed, 1660 insertions(+)
 create mode 100644 drivers/net/wireless/realtek/rtw88/hci.h
 create mode 100644 drivers/net/wireless/realtek/rtw88/pci.c
 create mode 100644 drivers/net/wireless/realtek/rtw88/pci.h

diff --git a/drivers/net/wireless/realtek/rtw88/hci.h b/drivers/net/wireless/realtek/rtw88/hci.h
new file mode 100644
index 0000000..e1f200b
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/hci.h
@@ -0,0 +1,212 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2018  Realtek Corporation.
+ */
+
+#ifndef	__RTW_HCI_H__
+#define __RTW_HCI_H__
+
+/* ops for PCI, USB and SDIO */
+struct rtw_hci_ops {
+	int (*tx)(struct rtw_dev *rtwdev,
+		  struct rtw_tx_pkt_info *pkt_info,
+		  struct sk_buff *skb);
+	int (*setup)(struct rtw_dev *rtwdev);
+	int (*start)(struct rtw_dev *rtwdev);
+	void (*stop)(struct rtw_dev *rtwdev);
+
+	int (*write_data_rsvd_page)(struct rtw_dev *rtwdev, u8 *buf, u32 size);
+	int (*write_data_h2c)(struct rtw_dev *rtwdev, u8 *buf, u32 size);
+
+	u8 (*read8)(struct rtw_dev *rtwdev, u32 addr);
+	u16 (*read16)(struct rtw_dev *rtwdev, u32 addr);
+	u32 (*read32)(struct rtw_dev *rtwdev, u32 addr);
+	void (*write8)(struct rtw_dev *rtwdev, u32 addr, u8 val);
+	void (*write16)(struct rtw_dev *rtwdev, u32 addr, u16 val);
+	void (*write32)(struct rtw_dev *rtwdev, u32 addr, u32 val);
+	int (*check_avail_desc)(struct rtw_dev *rtwdev, struct sk_buff *skb);
+};
+
+static inline int rtw_hci_tx(struct rtw_dev *rtwdev,
+			     struct rtw_tx_pkt_info *pkt_info,
+			     struct sk_buff *skb)
+{
+	return rtwdev->hci.ops->tx(rtwdev, pkt_info, skb);
+}
+
+static inline int rtw_hci_setup(struct rtw_dev *rtwdev)
+{
+	return rtwdev->hci.ops->setup(rtwdev);
+}
+
+static inline int rtw_hci_start(struct rtw_dev *rtwdev)
+{
+	return rtwdev->hci.ops->start(rtwdev);
+}
+
+static inline void rtw_hci_stop(struct rtw_dev *rtwdev)
+{
+	rtwdev->hci.ops->stop(rtwdev);
+}
+
+static inline int
+rtw_hci_write_data_rsvd_page(struct rtw_dev *rtwdev, u8 *buf, u32 size)
+{
+	return rtwdev->hci.ops->write_data_rsvd_page(rtwdev, buf, size);
+}
+
+static inline int
+rtw_hci_write_data_h2c(struct rtw_dev *rtwdev, u8 *buf, u32 size)
+{
+	return rtwdev->hci.ops->write_data_h2c(rtwdev, buf, size);
+}
+
+static inline u8 rtw_read8(struct rtw_dev *rtwdev, u32 addr)
+{
+	return rtwdev->hci.ops->read8(rtwdev, addr);
+}
+
+static inline u16 rtw_read16(struct rtw_dev *rtwdev, u32 addr)
+{
+	return rtwdev->hci.ops->read16(rtwdev, addr);
+}
+
+static inline u32 rtw_read32(struct rtw_dev *rtwdev, u32 addr)
+{
+	return rtwdev->hci.ops->read32(rtwdev, addr);
+}
+
+static inline void rtw_write8(struct rtw_dev *rtwdev, u32 addr, u8 val)
+{
+	rtwdev->hci.ops->write8(rtwdev, addr, val);
+}
+
+static inline void rtw_write16(struct rtw_dev *rtwdev, u32 addr, u16 val)
+{
+	rtwdev->hci.ops->write16(rtwdev, addr, val);
+}
+
+static inline void rtw_write32(struct rtw_dev *rtwdev, u32 addr, u32 val)
+{
+	rtwdev->hci.ops->write32(rtwdev, addr, val);
+}
+
+static inline void rtw_write8_set(struct rtw_dev *rtwdev, u32 addr, u8 bit)
+{
+	u8 val;
+
+	val = rtw_read8(rtwdev, addr);
+	rtw_write8(rtwdev, addr, val | bit);
+}
+
+static inline void rtw_writ16_set(struct rtw_dev *rtwdev, u32 addr, u16 bit)
+{
+	u16 val;
+
+	val = rtw_read16(rtwdev, addr);
+	rtw_write16(rtwdev, addr, val | bit);
+}
+
+static inline void rtw_write32_set(struct rtw_dev *rtwdev, u32 addr, u32 bit)
+{
+	u32 val;
+
+	val = rtw_read32(rtwdev, addr);
+	rtw_write32(rtwdev, addr, val | bit);
+}
+
+static inline void rtw_write8_clr(struct rtw_dev *rtwdev, u32 addr, u8 bit)
+{
+	u8 val;
+
+	val = rtw_read8(rtwdev, addr);
+	rtw_write8(rtwdev, addr, val & ~bit);
+}
+
+static inline void rtw_write16_clr(struct rtw_dev *rtwdev, u32 addr, u16 bit)
+{
+	u16 val;
+
+	val = rtw_read16(rtwdev, addr);
+	rtw_write16(rtwdev, addr, val & ~bit);
+}
+
+static inline void rtw_write32_clr(struct rtw_dev *rtwdev, u32 addr, u32 bit)
+{
+	u32 val;
+
+	val = rtw_read32(rtwdev, addr);
+	rtw_write32(rtwdev, addr, val & ~bit);
+}
+
+static inline u32
+rtw_read_rf(struct rtw_dev *rtwdev, enum rtw_rf_path rf_path,
+	    u32 addr, u32 mask)
+{
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&rtwdev->rf_lock, flags);
+	val = rtwdev->chip->ops->read_rf(rtwdev, rf_path, addr, mask);
+	spin_unlock_irqrestore(&rtwdev->rf_lock, flags);
+
+	return val;
+}
+
+static inline void
+rtw_write_rf(struct rtw_dev *rtwdev, enum rtw_rf_path rf_path,
+	     u32 addr, u32 mask, u32 data)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&rtwdev->rf_lock, flags);
+	rtwdev->chip->ops->write_rf(rtwdev, rf_path, addr, mask, data);
+	spin_unlock_irqrestore(&rtwdev->rf_lock, flags);
+}
+
+static inline u32
+rtw_read32_mask(struct rtw_dev *rtwdev, u32 addr, u32 mask)
+{
+	u32 shift = __ffs(mask);
+	u32 orig;
+	u32 ret;
+
+	orig = rtw_read32(rtwdev, addr);
+	ret = (orig & mask) >> shift;
+
+	return ret;
+}
+
+static inline void
+rtw_write32_mask(struct rtw_dev *rtwdev, u32 addr, u32 mask, u32 data)
+{
+	u32 shift = __ffs(mask);
+	u32 orig;
+	u32 set;
+
+	WARN(addr & 0x3, "should be 4-byte aligned, addr = 0x%08x", addr);
+
+	orig = rtw_read32(rtwdev, addr);
+	set = (orig & ~mask) | ((data << shift) & mask);
+	rtw_write32(rtwdev, addr, set);
+}
+
+static inline void
+rtw_write8_mask(struct rtw_dev *rtwdev, u32 addr, u32 mask, u8 data)
+{
+	u32 shift;
+	u8 orig, set;
+
+	mask &= 0xff;
+	shift = __ffs(mask);
+
+	orig = rtw_read8(rtwdev, addr);
+	set = (orig & ~mask) | ((data << shift) & mask);
+	rtw_write8(rtwdev, addr, set);
+}
+
+static inline enum rtw_hci_type rtw_hci_type(struct rtw_dev *rtwdev)
+{
+	return rtwdev->hci.type;
+}
+
+#endif
diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
new file mode 100644
index 0000000..3feab60
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/pci.c
@@ -0,0 +1,1220 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2018  Realtek Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include "main.h"
+#include "pci.h"
+#include "tx.h"
+#include "rx.h"
+#include "debug.h"
+
+static u32 rtw_pci_tx_queue_idx_addr[] = {
+	[RTW_TX_QUEUE_BK]	= RTK_PCI_TXBD_IDX_BKQ,
+	[RTW_TX_QUEUE_BE]	= RTK_PCI_TXBD_IDX_BEQ,
+	[RTW_TX_QUEUE_VI]	= RTK_PCI_TXBD_IDX_VIQ,
+	[RTW_TX_QUEUE_VO]	= RTK_PCI_TXBD_IDX_VOQ,
+	[RTW_TX_QUEUE_MGMT]	= RTK_PCI_TXBD_IDX_MGMTQ,
+	[RTW_TX_QUEUE_HI0]	= RTK_PCI_TXBD_IDX_HI0Q,
+	[RTW_TX_QUEUE_H2C]	= RTK_PCI_TXBD_IDX_H2CQ,
+};
+
+static u8 rtw_pci_get_tx_qsel(struct sk_buff *skb, u8 queue)
+{
+	switch (queue) {
+	case RTW_TX_QUEUE_BCN:
+		return TX_DESC_QSEL_BEACON;
+	case RTW_TX_QUEUE_H2C:
+		return TX_DESC_QSEL_H2C;
+	case RTW_TX_QUEUE_MGMT:
+		return TX_DESC_QSEL_MGMT;
+	case RTW_TX_QUEUE_HI0:
+		return TX_DESC_QSEL_HIGH;
+	default:
+		return skb->priority;
+	}
+};
+
+static u8 rtw_pci_read8(struct rtw_dev *rtwdev, u32 addr)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	return readb(rtwpci->mmap + addr);
+}
+
+static u16 rtw_pci_read16(struct rtw_dev *rtwdev, u32 addr)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	return readw(rtwpci->mmap + addr);
+}
+
+static u32 rtw_pci_read32(struct rtw_dev *rtwdev, u32 addr)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	return readl(rtwpci->mmap + addr);
+}
+
+static void rtw_pci_write8(struct rtw_dev *rtwdev, u32 addr, u8 val)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	writeb(val, rtwpci->mmap + addr);
+}
+
+static void rtw_pci_write16(struct rtw_dev *rtwdev, u32 addr, u16 val)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	writew(val, rtwpci->mmap + addr);
+}
+
+static void rtw_pci_write32(struct rtw_dev *rtwdev, u32 addr, u32 val)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	writel(val, rtwpci->mmap + addr);
+}
+
+static inline void *rtw_pci_get_tx_desc(struct rtw_pci_tx_ring *tx_ring, u8 idx)
+{
+	int offset = tx_ring->r.desc_size * idx;
+
+	return tx_ring->r.head + offset;
+}
+
+static void rtw_pci_free_tx_ring(struct rtw_dev *rtwdev,
+				 struct rtw_pci_tx_ring *tx_ring)
+{
+	struct pci_dev *pdev = to_pci_dev(rtwdev->dev);
+	struct rtw_pci_tx_data *tx_data;
+	struct sk_buff *skb, *tmp;
+	dma_addr_t dma;
+	u8 *head = tx_ring->r.head;
+	u32 len = tx_ring->r.len;
+	int ring_sz = len * tx_ring->r.desc_size;
+
+	/* free every skb remained in tx list */
+	skb_queue_walk_safe(&tx_ring->queue, skb, tmp) {
+		__skb_unlink(skb, &tx_ring->queue);
+		tx_data = rtw_pci_get_tx_data(skb);
+		dma = tx_data->dma;
+
+		pci_unmap_single(pdev, dma, skb->len, PCI_DMA_TODEVICE);
+		dev_kfree_skb_any(skb);
+	}
+
+	/* free the ring itself */
+	pci_free_consistent(pdev, ring_sz, head, tx_ring->r.dma);
+	tx_ring->r.head = NULL;
+}
+
+static void rtw_pci_free_rx_ring(struct rtw_dev *rtwdev,
+				 struct rtw_pci_rx_ring *rx_ring)
+{
+	struct pci_dev *pdev = to_pci_dev(rtwdev->dev);
+	struct sk_buff *skb;
+	dma_addr_t dma;
+	u8 *head = rx_ring->r.head;
+	int buf_sz = RTK_PCI_RX_BUF_SIZE;
+	int ring_sz = rx_ring->r.desc_size * rx_ring->r.len;
+	int i;
+
+	for (i = 0; i < rx_ring->r.len; i++) {
+		skb = rx_ring->buf[i];
+		if (!skb)
+			continue;
+
+		dma = *((dma_addr_t *)skb->cb);
+		pci_unmap_single(pdev, dma, buf_sz, PCI_DMA_FROMDEVICE);
+		dev_kfree_skb(skb);
+		rx_ring->buf[i] = NULL;
+	}
+
+	pci_free_consistent(pdev, ring_sz, head, rx_ring->r.dma);
+}
+
+static void rtw_pci_free_trx_ring(struct rtw_dev *rtwdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	struct rtw_pci_tx_ring *tx_ring;
+	struct rtw_pci_rx_ring *rx_ring;
+	int i;
+
+	for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) {
+		tx_ring = &rtwpci->tx_rings[i];
+		rtw_pci_free_tx_ring(rtwdev, tx_ring);
+	}
+
+	for (i = 0; i < RTK_MAX_RX_QUEUE_NUM; i++) {
+		rx_ring = &rtwpci->rx_rings[i];
+		rtw_pci_free_rx_ring(rtwdev, rx_ring);
+	}
+}
+
+static int rtw_pci_init_tx_ring(struct rtw_dev *rtwdev,
+				struct rtw_pci_tx_ring *tx_ring,
+				u8 desc_size, u32 len)
+{
+	struct pci_dev *pdev = to_pci_dev(rtwdev->dev);
+	int ring_sz = desc_size * len;
+	dma_addr_t dma;
+	u8 *head;
+
+	head = pci_zalloc_consistent(pdev, ring_sz, &dma);
+	if (!head) {
+		rtw_err(rtwdev, "failed to allocate tx ring\n");
+		return -ENOMEM;
+	}
+
+	skb_queue_head_init(&tx_ring->queue);
+	tx_ring->r.head = head;
+	tx_ring->r.dma = dma;
+	tx_ring->r.len = len;
+	tx_ring->r.desc_size = desc_size;
+	tx_ring->r.wp = 0;
+	tx_ring->r.rp = 0;
+
+	return 0;
+}
+
+static int rtw_pci_reset_rx_desc(struct rtw_dev *rtwdev, struct sk_buff *skb,
+				 struct rtw_pci_rx_ring *rx_ring,
+				 u32 idx, u32 desc_sz)
+{
+	struct pci_dev *pdev = to_pci_dev(rtwdev->dev);
+	struct rtw_pci_rx_buffer_desc *buf_desc;
+	int buf_sz = RTK_PCI_RX_BUF_SIZE;
+	dma_addr_t dma;
+
+	if (!skb)
+		return -EINVAL;
+
+	dma = pci_map_single(pdev, skb->data, buf_sz, PCI_DMA_FROMDEVICE);
+	if (pci_dma_mapping_error(pdev, dma))
+		return -EBUSY;
+
+	*((dma_addr_t *)skb->cb) = dma;
+	buf_desc = (struct rtw_pci_rx_buffer_desc *)(rx_ring->r.head +
+						     idx * desc_sz);
+	memset(buf_desc, 0, sizeof(*buf_desc));
+	buf_desc->buf_size = cpu_to_le16(8216);
+	buf_desc->dma = cpu_to_le32(dma);
+
+	return 0;
+}
+
+static int rtw_pci_init_rx_ring(struct rtw_dev *rtwdev,
+				struct rtw_pci_rx_ring *rx_ring,
+				u8 desc_size, u32 len)
+{
+	struct pci_dev *pdev = to_pci_dev(rtwdev->dev);
+	struct sk_buff *skb = NULL;
+	dma_addr_t dma;
+	u8 *head;
+	int ring_sz = desc_size * len;
+	int buf_sz = RTK_PCI_RX_BUF_SIZE;
+	int i, allocated;
+	int ret = 0;
+
+	head = pci_zalloc_consistent(pdev, ring_sz, &dma);
+	if (!head) {
+		rtw_err(rtwdev, "failed to allocate rx ring\n");
+		return -ENOMEM;
+	}
+	rx_ring->r.head = head;
+
+	for (i = 0; i < len; i++) {
+		skb = dev_alloc_skb(buf_sz);
+		memset(skb->data, 0, buf_sz);
+		rx_ring->buf[i] = skb;
+		ret = rtw_pci_reset_rx_desc(rtwdev, skb, rx_ring, i, desc_size);
+		if (ret) {
+			allocated = i;
+			goto err_out;
+		}
+	}
+
+	rx_ring->r.dma = dma;
+	rx_ring->r.len = len;
+	rx_ring->r.desc_size = desc_size;
+	rx_ring->r.wp = 0;
+	rx_ring->r.rp = 0;
+
+	return 0;
+
+err_out:
+	dev_kfree_skb_any(skb);
+	for (i = 0; i < allocated; i++) {
+		skb = rx_ring->buf[i];
+		if (!skb)
+			continue;
+		dma = *((dma_addr_t *)skb->cb);
+		pci_unmap_single(pdev, dma, buf_sz, PCI_DMA_FROMDEVICE);
+		dev_kfree_skb_any(skb);
+		rx_ring->buf[i] = NULL;
+	}
+	pci_free_consistent(pdev, ring_sz, head, dma);
+
+	return ret;
+}
+
+static int rtw_pci_init_trx_ring(struct rtw_dev *rtwdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	struct rtw_pci_tx_ring *tx_ring;
+	struct rtw_pci_rx_ring *rx_ring;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	int i = 0, j = 0, tx_alloced = 0, rx_alloced = 0;
+	int tx_desc_size, rx_desc_size;
+	u32 len;
+	int ret;
+
+	tx_desc_size = chip->tx_buf_desc_sz;
+
+	for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) {
+		tx_ring = &rtwpci->tx_rings[i];
+		len = max_num_of_tx_queue(i);
+		ret = rtw_pci_init_tx_ring(rtwdev, tx_ring, tx_desc_size, len);
+		if (ret)
+			goto out;
+	}
+
+	rx_desc_size = chip->rx_buf_desc_sz;
+
+	for (j = 0; j < RTK_MAX_RX_QUEUE_NUM; j++) {
+		rx_ring = &rtwpci->rx_rings[j];
+		ret = rtw_pci_init_rx_ring(rtwdev, rx_ring, rx_desc_size,
+					   RTK_MAX_RX_DESC_NUM);
+		if (ret)
+			goto out;
+	}
+
+	return 0;
+
+out:
+	tx_alloced = i;
+	for (i = 0; i < tx_alloced; i++) {
+		tx_ring = &rtwpci->tx_rings[i];
+		rtw_pci_free_tx_ring(rtwdev, tx_ring);
+	}
+
+	rx_alloced = j;
+	for (j = 0; j < rx_alloced; j++) {
+		rx_ring = &rtwpci->rx_rings[j];
+		rtw_pci_free_rx_ring(rtwdev, rx_ring);
+	}
+
+	return ret;
+}
+
+static void rtw_pci_deinit(struct rtw_dev *rtwdev)
+{
+	rtw_pci_free_trx_ring(rtwdev);
+}
+
+static int rtw_pci_init(struct rtw_dev *rtwdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	int ret = 0;
+
+	rtwpci->irq_mask[0] = IMR_HIGHDOK |
+			      IMR_MGNTDOK |
+			      IMR_BKDOK |
+			      IMR_BEDOK |
+			      IMR_VIDOK |
+			      IMR_VODOK |
+			      IMR_ROK |
+			      IMR_BCNDMAINT_E |
+			      0;
+	rtwpci->irq_mask[1] = IMR_TXFOVW |
+			      0;
+	rtwpci->irq_mask[3] = IMR_H2CDOK |
+			      0;
+	spin_lock_init(&rtwpci->irq_lock);
+	ret = rtw_pci_init_trx_ring(rtwdev);
+
+	return ret;
+}
+
+static void rtw_pci_reset_buf_desc(struct rtw_dev *rtwdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	u32 len;
+	u8 tmp;
+	dma_addr_t dma;
+
+	tmp = rtw_read8(rtwdev, RTK_PCI_CTRL + 3);
+	rtw_write8(rtwdev, RTK_PCI_CTRL + 3, tmp | 0xf7);
+
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_BCN].r.dma;
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_BCNQ, dma);
+
+	len = rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.len;
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.dma;
+	rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.rp = 0;
+	rtwpci->tx_rings[RTW_TX_QUEUE_H2C].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_H2CQ, len);
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_H2CQ, dma);
+
+	len = rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.len;
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.dma;
+	rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.rp = 0;
+	rtwpci->tx_rings[RTW_TX_QUEUE_BK].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_BKQ, len);
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_BKQ, dma);
+
+	len = rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.len;
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.dma;
+	rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.rp = 0;
+	rtwpci->tx_rings[RTW_TX_QUEUE_BE].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_BEQ, len);
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_BEQ, dma);
+
+	len = rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.len;
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.dma;
+	rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.rp = 0;
+	rtwpci->tx_rings[RTW_TX_QUEUE_VO].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_VOQ, len);
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_VOQ, dma);
+
+	len = rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.len;
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.dma;
+	rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.rp = 0;
+	rtwpci->tx_rings[RTW_TX_QUEUE_VI].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_VIQ, len);
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_VIQ, dma);
+
+	len = rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.len;
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.dma;
+	rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.rp = 0;
+	rtwpci->tx_rings[RTW_TX_QUEUE_MGMT].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_MGMTQ, len);
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_MGMTQ, dma);
+
+	len = rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.len;
+	dma = rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.dma;
+	rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.rp = 0;
+	rtwpci->tx_rings[RTW_TX_QUEUE_HI0].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_TXBD_NUM_HI0Q, len);
+	rtw_write32(rtwdev, RTK_PCI_TXBD_DESA_HI0Q, dma);
+
+	len = rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.len;
+	dma = rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.dma;
+	rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.rp = 0;
+	rtwpci->rx_rings[RTW_RX_QUEUE_MPDU].r.wp = 0;
+	rtw_write16(rtwdev, RTK_PCI_RXBD_NUM_MPDUQ, len & 0xfff);
+	rtw_write32(rtwdev, RTK_PCI_RXBD_DESA_MPDUQ, dma);
+
+	/* reset read/write point */
+	rtw_write32(rtwdev, RTK_PCI_TXBD_RWPTR_CLR, 0xffffffff);
+}
+
+static void rtw_pci_reset_trx_ring(struct rtw_dev *rtwdev)
+{
+	rtw_pci_reset_buf_desc(rtwdev);
+}
+
+static void rtw_pci_enable_interrupt(struct rtw_dev *rtwdev,
+				     struct rtw_pci *rtwpci)
+{
+	rtw_write32(rtwdev, RTK_PCI_HIMR0, rtwpci->irq_mask[0]);
+	rtw_write32(rtwdev, RTK_PCI_HIMR1, rtwpci->irq_mask[1]);
+	rtw_write32(rtwdev, RTK_PCI_HIMR3, rtwpci->irq_mask[3]);
+	rtwpci->irq_enabled = true;
+}
+
+static void rtw_pci_disable_interrupt(struct rtw_dev *rtwdev,
+				      struct rtw_pci *rtwpci)
+{
+	rtw_write32(rtwdev, RTK_PCI_HIMR0, 0);
+	rtw_write32(rtwdev, RTK_PCI_HIMR1, 0);
+	rtw_write32(rtwdev, RTK_PCI_HIMR3, 0);
+	rtwpci->irq_enabled = false;
+}
+
+static int rtw_pci_setup(struct rtw_dev *rtwdev)
+{
+	rtw_pci_reset_trx_ring(rtwdev);
+
+	return 0;
+}
+
+static int rtw_pci_start(struct rtw_dev *rtwdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&rtwpci->irq_lock, flags);
+	rtw_pci_enable_interrupt(rtwdev, rtwpci);
+	spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
+
+	return 0;
+}
+
+static void rtw_pci_stop(struct rtw_dev *rtwdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&rtwpci->irq_lock, flags);
+	rtw_pci_disable_interrupt(rtwdev, rtwpci);
+	spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
+}
+
+static u8 ac_to_hwq[] = {
+	[0] = RTW_TX_QUEUE_VO,
+	[1] = RTW_TX_QUEUE_VI,
+	[2] = RTW_TX_QUEUE_BE,
+	[3] = RTW_TX_QUEUE_BK,
+};
+
+static u8 rtw_hw_queue_mapping(struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	__le16 fc = hdr->frame_control;
+	u8 q_mapping = skb_get_queue_mapping(skb);
+	u8 queue;
+
+	if (unlikely(ieee80211_is_beacon(fc)))
+		queue = RTW_TX_QUEUE_BCN;
+	else if (unlikely(ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)))
+		queue = RTW_TX_QUEUE_MGMT;
+	else
+		queue = ac_to_hwq[q_mapping];
+
+	return queue;
+}
+
+static void rtw_pci_release_rsvd_page(struct rtw_pci *rtwpci,
+				      struct rtw_pci_tx_ring *ring)
+{
+	struct sk_buff *prev = skb_dequeue(&ring->queue);
+	struct rtw_pci_tx_data *tx_data;
+	dma_addr_t dma;
+
+	if (!prev)
+		return;
+
+	tx_data = rtw_pci_get_tx_data(prev);
+	dma = tx_data->dma;
+	pci_unmap_single(rtwpci->pdev, dma, prev->len,
+			 PCI_DMA_TODEVICE);
+	dev_kfree_skb_any(prev);
+}
+
+static void rtw_pci_dma_check(struct rtw_dev *rtwdev,
+			      struct rtw_pci_rx_ring *rx_ring,
+			      u32 idx)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_pci_rx_buffer_desc *buf_desc;
+	u32 desc_sz = chip->rx_buf_desc_sz;
+	u16 total_pkt_size;
+	int i;
+
+	buf_desc = (struct rtw_pci_rx_buffer_desc *)(rx_ring->r.head +
+						     idx * desc_sz);
+	for (i = 0; i < 20; i++) {
+		total_pkt_size = le16_to_cpu(buf_desc->total_pkt_size);
+		if (total_pkt_size)
+			return;
+	}
+
+	if (i >= 20)
+		rtw_warn(rtwdev, "pci bus timeout, drop packet\n");
+}
+
+static int rtw_pci_xmit(struct rtw_dev *rtwdev,
+			struct rtw_tx_pkt_info *pkt_info,
+			struct sk_buff *skb, u8 queue)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_pci_tx_ring *ring;
+	struct rtw_pci_tx_data *tx_data;
+	dma_addr_t dma;
+	u32 tx_pkt_desc_sz = chip->tx_pkt_desc_sz;
+	u32 tx_buf_desc_sz = chip->tx_buf_desc_sz;
+	u32 size;
+	u32 psb_len;
+	u8 *pkt_desc;
+	struct rtw_pci_tx_buffer_desc *buf_desc;
+	u32 bd_idx;
+
+	ring = &rtwpci->tx_rings[queue];
+
+	size = skb->len;
+
+	if (queue == RTW_TX_QUEUE_BCN)
+		rtw_pci_release_rsvd_page(rtwpci, ring);
+	else if (!avail_desc(ring->r.wp, ring->r.rp, ring->r.len))
+		return -ENOSPC;
+
+	pkt_desc = skb_push(skb, chip->tx_pkt_desc_sz);
+	memset(pkt_desc, 0, tx_pkt_desc_sz);
+	pkt_info->qsel = rtw_pci_get_tx_qsel(skb, queue);
+	rtw_tx_fill_tx_desc(pkt_info, skb);
+	dma = pci_map_single(rtwpci->pdev, skb->data, skb->len,
+			     PCI_DMA_TODEVICE);
+	if (pci_dma_mapping_error(rtwpci->pdev, dma))
+		return -EBUSY;
+
+	/* after this we got dma mapped, there is no way back */
+	buf_desc = get_tx_buffer_desc(ring, tx_buf_desc_sz);
+	memset(buf_desc, 0, tx_buf_desc_sz);
+	psb_len = (skb->len - 1) / 128 + 1;
+	if (queue == RTW_TX_QUEUE_BCN)
+		psb_len |= 1 << RTK_PCI_TXBD_OWN_OFFSET;
+
+	buf_desc[0].psb_len = cpu_to_le16(psb_len);
+	buf_desc[0].buf_size = cpu_to_le16(tx_pkt_desc_sz);
+	buf_desc[0].dma = cpu_to_le32(dma);
+	buf_desc[1].buf_size = cpu_to_le16(size);
+	buf_desc[1].dma = cpu_to_le32(dma + tx_pkt_desc_sz);
+
+	tx_data = rtw_pci_get_tx_data(skb);
+	tx_data->dma = dma;
+	skb_queue_tail(&ring->queue, skb);
+
+	/* kick off tx queue */
+	if (queue != RTW_TX_QUEUE_BCN) {
+		if (++ring->r.wp >= ring->r.len)
+			ring->r.wp = 0;
+		bd_idx = rtw_pci_tx_queue_idx_addr[queue];
+		rtw_write16(rtwdev, bd_idx, ring->r.wp & 0xfff);
+	} else {
+		u32 reg_bcn_work;
+
+		reg_bcn_work = rtw_read8(rtwdev, RTK_PCI_TXBD_BCN_WORK);
+		reg_bcn_work |= BIT_PCI_BCNQ_FLAG;
+		rtw_write8(rtwdev, RTK_PCI_TXBD_BCN_WORK, reg_bcn_work);
+	}
+
+	return 0;
+}
+
+static int rtw_pci_write_data_rsvd_page(struct rtw_dev *rtwdev, u8 *buf,
+					u32 size)
+{
+	struct sk_buff *skb;
+	struct rtw_tx_pkt_info pkt_info;
+	u32 tx_pkt_desc_sz;
+	u32 length;
+
+	tx_pkt_desc_sz = rtwdev->chip->tx_pkt_desc_sz;
+	length = size + tx_pkt_desc_sz;
+	skb = dev_alloc_skb(length);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_reserve(skb, tx_pkt_desc_sz);
+	memcpy((u8 *)skb_put(skb, size), buf, size);
+	memset(&pkt_info, 0, sizeof(pkt_info));
+	pkt_info.tx_pkt_size = size;
+	pkt_info.offset = tx_pkt_desc_sz;
+
+	return rtw_pci_xmit(rtwdev, &pkt_info, skb, RTW_TX_QUEUE_BCN);
+}
+
+static int rtw_pci_write_data_h2c(struct rtw_dev *rtwdev, u8 *buf, u32 size)
+{
+	struct sk_buff *skb;
+	struct rtw_tx_pkt_info pkt_info;
+	u32 tx_pkt_desc_sz;
+	u32 length;
+
+	tx_pkt_desc_sz = rtwdev->chip->tx_pkt_desc_sz;
+	length = size + tx_pkt_desc_sz;
+	skb = dev_alloc_skb(length);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_reserve(skb, tx_pkt_desc_sz);
+	memcpy((u8 *)skb_put(skb, size), buf, size);
+	memset(&pkt_info, 0, sizeof(pkt_info));
+	pkt_info.tx_pkt_size = size;
+
+	return rtw_pci_xmit(rtwdev, &pkt_info, skb, RTW_TX_QUEUE_H2C);
+}
+
+static int rtw_pci_tx(struct rtw_dev *rtwdev,
+		      struct rtw_tx_pkt_info *pkt_info,
+		      struct sk_buff *skb)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	struct rtw_pci_tx_ring *ring;
+	u8 queue = rtw_hw_queue_mapping(skb);
+	int ret;
+
+	ret = rtw_pci_xmit(rtwdev, pkt_info, skb, queue);
+	if (ret)
+		return ret;
+
+	ring = &rtwpci->tx_rings[queue];
+	if (avail_desc(ring->r.wp, ring->r.rp, ring->r.len) < 2) {
+		ieee80211_stop_queue(rtwdev->hw, skb_get_queue_mapping(skb));
+		ring->queue_stopped = true;
+	}
+
+	return 0;
+}
+
+static
+int rtw_pci_check_avail_desc(struct rtw_dev *rtwdev, struct sk_buff *skb)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	struct rtw_pci_tx_ring *ring;
+	u8 queue = rtw_hw_queue_mapping(skb);
+
+	ring = &rtwpci->tx_rings[queue];
+
+	return avail_desc(ring->r.wp, ring->r.rp, ring->r.len);
+}
+
+static void rtw_pci_tx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci,
+			   u8 hw_queue)
+{
+	struct ieee80211_hw *hw = rtwdev->hw;
+	struct ieee80211_tx_info *info;
+	struct rtw_pci_tx_ring *ring;
+	struct rtw_pci_tx_data *tx_data;
+	struct sk_buff *skb;
+	u32 count;
+	u32 bd_idx_addr;
+	u32 bd_idx, cur_rp;
+	u16 q_map;
+
+	ring = &rtwpci->tx_rings[hw_queue];
+
+	bd_idx_addr = rtw_pci_tx_queue_idx_addr[hw_queue];
+	bd_idx = rtw_read32(rtwdev, bd_idx_addr);
+	cur_rp = bd_idx >> 16;
+	cur_rp &= 0xfff;
+	if (cur_rp >= ring->r.rp)
+		count = cur_rp - ring->r.rp;
+	else
+		count = ring->r.len - (ring->r.rp - cur_rp);
+
+	while (count--) {
+		skb = skb_dequeue(&ring->queue);
+		tx_data = rtw_pci_get_tx_data(skb);
+		pci_unmap_single(rtwpci->pdev, tx_data->dma, skb->len,
+				 PCI_DMA_TODEVICE);
+
+		/* just free command packets from host to card */
+		if (hw_queue == RTW_TX_QUEUE_H2C) {
+			dev_kfree_skb_irq(skb);
+			continue;
+		}
+
+		if (ring->queue_stopped &&
+		    avail_desc(ring->r.wp, ring->r.rp, ring->r.len) > 4) {
+			q_map = skb_get_queue_mapping(skb);
+			ieee80211_wake_queue(hw, q_map);
+			ring->queue_stopped = false;
+		}
+
+		info = IEEE80211_SKB_CB(skb);
+		ieee80211_tx_info_clear_status(info);
+		info->flags |= IEEE80211_TX_STAT_ACK;
+		ieee80211_tx_status_irqsafe(hw, skb);
+	}
+
+	ring->r.rp = cur_rp;
+}
+
+static void rtw_pci_rx_isr(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci,
+			   u8 hw_queue)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_pci_rx_ring *ring;
+	struct rtw_rx_pkt_stat pkt_stat;
+	struct ieee80211_rx_status rx_status;
+	struct sk_buff *skb, *new;
+	u32 cur_wp, cur_rp, tmp;
+	u32 count;
+	u32 pkt_offset;
+	u32 pkt_desc_sz = chip->rx_pkt_desc_sz;
+	u32 buf_desc_sz = chip->rx_buf_desc_sz;
+	u8 *rx_desc;
+	dma_addr_t dma;
+
+	ring = &rtwpci->rx_rings[RTW_RX_QUEUE_MPDU];
+
+	tmp = rtw_read32(rtwdev, RTK_PCI_RXBD_IDX_MPDUQ);
+	cur_wp = tmp >> 16;
+	cur_wp &= 0xfff;
+	if (cur_wp >= ring->r.wp)
+		count = cur_wp - ring->r.wp;
+	else
+		count = ring->r.len - (ring->r.wp - cur_wp);
+
+	cur_rp = ring->r.rp;
+	while (count--) {
+		rtw_pci_dma_check(rtwdev, ring, cur_rp);
+		skb = ring->buf[cur_rp];
+		dma = *((dma_addr_t *)skb->cb);
+		pci_unmap_single(rtwpci->pdev, dma, RTK_PCI_RX_BUF_SIZE,
+				 PCI_DMA_FROMDEVICE);
+		rx_desc = skb->data;
+		chip->ops->query_rx_desc(rtwdev, rx_desc, &pkt_stat, &rx_status);
+
+		/* offset from rx_desc to payload */
+		pkt_offset = pkt_desc_sz + pkt_stat.drv_info_sz +
+			     pkt_stat.shift;
+
+		if (pkt_stat.is_c2h) {
+			/* keep rx_desc, halmac needs it */
+			skb_put(skb, pkt_stat.pkt_len + pkt_offset);
+
+			/* pass offset for further operation */
+			*((u32 *)skb->cb) = pkt_offset;
+			skb_queue_tail(&rtwdev->c2h_queue, skb);
+			ieee80211_queue_work(rtwdev->hw, &rtwdev->c2h_work);
+		} else {
+			/* remove rx_desc, maybe use skb_pull? */
+			skb_put(skb, pkt_stat.pkt_len);
+			skb_reserve(skb, pkt_offset);
+
+			/* alloc a smaller skb to mac80211 */
+			new = dev_alloc_skb(pkt_stat.pkt_len);
+			if (!new) {
+				new = skb;
+			} else {
+				skb_put_data(new, skb->data, skb->len);
+				dev_kfree_skb_any(skb);
+			}
+			/* TODO: merge into rx.c */
+			rtw_rx_stats(rtwdev, pkt_stat.vif, skb);
+			memcpy(new->cb, &rx_status, sizeof(rx_status));
+			ieee80211_rx_irqsafe(rtwdev->hw, new);
+		}
+
+		/* skb delivered to mac80211, alloc a new one in rx ring */
+		new = dev_alloc_skb(RTK_PCI_RX_BUF_SIZE);
+		ring->buf[cur_rp] = new;
+		rtw_pci_reset_rx_desc(rtwdev, new, ring, cur_rp, buf_desc_sz);
+
+		/* host read next element in ring */
+		if (++cur_rp >= ring->r.len)
+			cur_rp = 0;
+	}
+
+	ring->r.rp = cur_rp;
+	ring->r.wp = cur_wp;
+	rtw_write16(rtwdev, RTK_PCI_RXBD_IDX_MPDUQ, ring->r.rp);
+}
+
+static void rtw_pci_irq_recognized(struct rtw_dev *rtwdev,
+				   struct rtw_pci *rtwpci, u32 *irq_status)
+{
+	irq_status[0] = rtw_read32(rtwdev, RTK_PCI_HISR0);
+	irq_status[1] = rtw_read32(rtwdev, RTK_PCI_HISR1);
+	irq_status[3] = rtw_read32(rtwdev, RTK_PCI_HISR3);
+	irq_status[0] &= rtwpci->irq_mask[0];
+	irq_status[1] &= rtwpci->irq_mask[1];
+	irq_status[3] &= rtwpci->irq_mask[3];
+	rtw_write32(rtwdev, RTK_PCI_HISR0, irq_status[0]);
+	rtw_write32(rtwdev, RTK_PCI_HISR1, irq_status[1]);
+	rtw_write32(rtwdev, RTK_PCI_HISR3, irq_status[3]);
+}
+
+static irqreturn_t rtw_pci_interrupt_handler(int irq, void *dev)
+{
+	struct rtw_dev *rtwdev = dev;
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	u32 irq_status[4];
+	unsigned long flags;
+
+	spin_lock_irqsave(&rtwpci->irq_lock, flags);
+	if (!rtwpci->irq_enabled)
+		goto out;
+
+	rtw_pci_disable_interrupt(rtwdev, rtwpci);
+
+	rtw_pci_irq_recognized(rtwdev, rtwpci, irq_status);
+
+	if (irq_status[0] & IMR_MGNTDOK)
+		rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_MGMT);
+	if (irq_status[0] & IMR_HIGHDOK)
+		rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_HI0);
+	if (irq_status[0] & IMR_BEDOK)
+		rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_BE);
+	if (irq_status[0] & IMR_BKDOK)
+		rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_BK);
+	if (irq_status[0] & IMR_VODOK)
+		rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_VO);
+	if (irq_status[0] & IMR_VIDOK)
+		rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_VI);
+	if (irq_status[3] & IMR_H2CDOK)
+		rtw_pci_tx_isr(rtwdev, rtwpci, RTW_TX_QUEUE_H2C);
+	if (irq_status[0] & IMR_ROK)
+		rtw_pci_rx_isr(rtwdev, rtwpci, RTW_RX_QUEUE_MPDU);
+
+	rtw_pci_enable_interrupt(rtwdev, rtwpci);
+
+out:
+	spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
+
+	return IRQ_HANDLED;
+}
+
+static int rtw_pci_io_mapping(struct rtw_dev *rtwdev,
+			      struct pci_dev *pdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+	unsigned long len;
+	u8 bar_id = 2;
+	int ret;
+
+	ret = pci_request_regions(pdev, KBUILD_MODNAME);
+	if (ret) {
+		rtw_err(rtwdev, "failed to request pci regions\n");
+		return ret;
+	}
+
+	len = pci_resource_len(pdev, bar_id);
+	rtwpci->mmap = pci_iomap(pdev, bar_id, len);
+	if (!rtwpci->mmap) {
+		rtw_err(rtwdev, "failed to map pci memory\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void rtw_pci_io_unmapping(struct rtw_dev *rtwdev,
+				 struct pci_dev *pdev)
+{
+	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	if (rtwpci->mmap) {
+		pci_iounmap(pdev, rtwpci->mmap);
+		pci_release_regions(pdev);
+	}
+}
+
+static void rtw_pci_init_aspm(struct rtw_dev *rtwdev)
+{
+}
+
+static void rtw_dbi_write8(struct rtw_dev *rtwdev, u16 addr, u8 data)
+{
+	u16 write_addr;
+	u16 remainder = addr & 0x3;
+	u8 flag;
+	u8 cnt = 20;
+
+	write_addr = ((addr & 0x0ffc) | (BIT(0) << (remainder + 12)));
+	rtw_write8(rtwdev, REG_DBI_WDATA_V1 + remainder, data);
+	rtw_write16(rtwdev, REG_DBI_FLAG_V1, write_addr);
+	rtw_write8(rtwdev, REG_DBI_FLAG_V1 + 2, 0x01);
+
+	flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2);
+	while (flag && (cnt != 0)) {
+		udelay(10);
+		flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2);
+		cnt--;
+	}
+
+	WARN(flag, "DBI write fail");
+}
+
+static void rtw_mdio_write(struct rtw_dev *rtwdev, u8 addr, u16 data, bool g1)
+{
+	u8 page;
+	u8 wflag;
+	u8 cnt;
+
+	rtw_write16(rtwdev, REG_MDIO_V1, data);
+
+	page = addr < 0x20 ? 0 : 1;
+	page += g1 ? 0 : 2;
+	rtw_write8(rtwdev, REG_PCIE_MIX_CFG, addr & 0x1f);
+	rtw_write8(rtwdev, REG_PCIE_MIX_CFG + 3, page);
+
+	rtw_write32_mask(rtwdev, REG_PCIE_MIX_CFG, BIT_MDIO_WFLAG_V1, 1);
+	wflag = rtw_read32_mask(rtwdev, REG_PCIE_MIX_CFG, BIT_MDIO_WFLAG_V1);
+
+	cnt = 20;
+	while (wflag && (cnt != 0)) {
+		udelay(10);
+		wflag = rtw_read32_mask(rtwdev, REG_PCIE_MIX_CFG,
+					BIT_MDIO_WFLAG_V1);
+		cnt--;
+	}
+
+	WARN(wflag, "MDIO write fail");
+}
+
+static void rtw_pci_phy_cfg(struct rtw_dev *rtwdev)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_intf_phy_para *para;
+	u16 cut;
+	u16 value;
+	u16 offset;
+	u16 ip_sel;
+	int i;
+
+	cut = BIT(0) << rtwdev->hal.cut_version;
+
+	for (i = 0; i < chip->intf_table->n_gen1_para; i++) {
+		para = &chip->intf_table->gen1_para[i];
+		if (!(para->cut_mask & cut))
+			continue;
+		if (para->offset == 0xffff)
+			break;
+		offset = para->offset;
+		value = para->value;
+		ip_sel = para->ip_sel;
+		if (para->ip_sel == RTW_IP_SEL_PHY)
+			rtw_mdio_write(rtwdev, offset, value, true);
+		else
+			rtw_dbi_write8(rtwdev, offset, value);
+	}
+
+	for (i = 0; i < chip->intf_table->n_gen2_para; i++) {
+		para = &chip->intf_table->gen2_para[i];
+		if (!(para->cut_mask & cut))
+			continue;
+		if (para->offset == 0xffff)
+			break;
+		offset = para->offset;
+		value = para->value;
+		ip_sel = para->ip_sel;
+		if (para->ip_sel == RTW_IP_SEL_PHY)
+			rtw_mdio_write(rtwdev, offset, value, false);
+		else
+			rtw_dbi_write8(rtwdev, offset, value);
+	}
+}
+
+static void rtw_pci_parse_configuration(struct rtw_dev *rtwdev,
+					struct pci_dev *pdev)
+{
+	u16 link_control;
+	u8 config;
+
+	/* Disable Clk Request */
+	pci_write_config_byte(pdev, 0x81, 0);
+	/* leave D3 mode */
+	pci_write_config_byte(pdev, 0x44, 0);
+	pci_write_config_byte(pdev, 0x04, 0x06);
+	pci_write_config_byte(pdev, 0x04, 0x07);
+
+	pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &link_control);
+
+	pci_read_config_byte(pdev, 0x98, &config);
+	config |= BIT(4);
+	pci_write_config_byte(pdev, 0x98, config);
+
+	pci_write_config_byte(pdev, 0x70f, 0x17);
+}
+
+static int rtw_pci_claim(struct rtw_dev *rtwdev, struct pci_dev *pdev)
+{
+	int ret;
+
+	ret = pci_enable_device(pdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to enable pci device\n");
+		return ret;
+	}
+
+	pci_set_master(pdev);
+	pci_set_drvdata(pdev, rtwdev->hw);
+	SET_IEEE80211_DEV(rtwdev->hw, &pdev->dev);
+
+	return 0;
+}
+
+static void rtw_pci_declaim(struct rtw_dev *rtwdev, struct pci_dev *pdev)
+{
+	pci_clear_master(pdev);
+	pci_disable_device(pdev);
+}
+
+static int rtw_pci_setup_resource(struct rtw_dev *rtwdev, struct pci_dev *pdev)
+{
+	struct rtw_pci *rtwpci;
+	int ret;
+
+	rtwpci = (struct rtw_pci *)rtwdev->priv;
+	rtwpci->pdev = pdev;
+
+	/* after this driver can access to hw registers */
+	ret = rtw_pci_io_mapping(rtwdev, pdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to request pci io region\n");
+		goto err_out;
+	}
+
+	ret = rtw_pci_init(rtwdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to allocate pci resources\n");
+		goto err_io_unmap;
+	}
+
+	rtw_pci_parse_configuration(rtwdev, pdev);
+	rtw_pci_init_aspm(rtwdev);
+	rtw_pci_phy_cfg(rtwdev);
+
+	return 0;
+
+err_io_unmap:
+	rtw_pci_io_unmapping(rtwdev, pdev);
+
+err_out:
+	return ret;
+}
+
+static void rtw_pci_destroy(struct rtw_dev *rtwdev, struct pci_dev *pdev)
+{
+	rtw_pci_deinit(rtwdev);
+	rtw_pci_io_unmapping(rtwdev, pdev);
+}
+
+static int rtw_pci_probe(struct pci_dev *pdev,
+			 const struct pci_device_id *id)
+{
+	struct ieee80211_hw *hw;
+	struct rtw_dev *rtwdev;
+	int drv_data_size;
+	int ret;
+
+	drv_data_size = sizeof(struct rtw_dev) + sizeof(struct rtw_pci);
+	hw = ieee80211_alloc_hw(drv_data_size, &rtw_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->chip = (struct rtw_chip_info *)id->driver_data;
+	rtwdev->hci.ops = &rtw_pci_ops;
+	rtwdev->hci.type = RTW_HCI_TYPE_PCIE;
+
+	ret = rtw_core_init(rtwdev);
+	if (ret)
+		goto err_release_hw;
+
+	rtw_dbg(rtwdev,
+		"rtw88 pci probe: vendor=0x%4.04X device=0x%4.04X rev=%d\n",
+		pdev->vendor, pdev->device, pdev->revision);
+
+	ret = rtw_pci_claim(rtwdev, pdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to claim pci device\n");
+		goto err_deinit_core;
+	}
+
+	ret = rtw_pci_setup_resource(rtwdev, pdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to setup pci resources\n");
+		goto err_pci_declaim;
+	}
+
+	ret = rtw_chip_info_setup(rtwdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to setup chip information\n");
+		goto err_destroy_pci;
+	}
+
+	ret = rtw_register_hw(rtwdev, hw);
+	if (ret) {
+		rtw_err(rtwdev, "failed to register hw\n");
+		goto err_destroy_pci;
+	}
+
+	ret = request_irq(pdev->irq, &rtw_pci_interrupt_handler,
+			  IRQF_SHARED, KBUILD_MODNAME, rtwdev);
+	if (ret) {
+		ieee80211_unregister_hw(hw);
+		goto err_destroy_pci;
+	}
+
+	return 0;
+
+err_destroy_pci:
+	rtw_pci_destroy(rtwdev, pdev);
+
+err_pci_declaim:
+	rtw_pci_declaim(rtwdev, pdev);
+
+err_deinit_core:
+	rtw_core_deinit(rtwdev);
+
+err_release_hw:
+	ieee80211_free_hw(hw);
+
+	return ret;
+}
+
+static void rtw_pci_remove(struct pci_dev *pdev)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+	struct rtw_dev *rtwdev;
+	struct rtw_pci *rtwpci;
+
+	if (!hw)
+		return;
+
+	rtwdev = hw->priv;
+	rtwpci = (struct rtw_pci *)rtwdev->priv;
+
+	rtw_unregister_hw(rtwdev, hw);
+	rtw_pci_disable_interrupt(rtwdev, rtwpci);
+	rtw_pci_destroy(rtwdev, pdev);
+	rtw_pci_declaim(rtwdev, pdev);
+	free_irq(rtwpci->pdev->irq, rtwdev);
+	rtw_core_deinit(rtwdev);
+	ieee80211_free_hw(hw);
+}
+
+static const struct pci_device_id rtw_pci_id_table[] = {
+#ifdef CONFIG_RTW88_8822BE
+	{ RTK_PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0xB822, rtw8822b_hw_spec) },
+#endif
+#ifdef CONFIG_RTW88_8822CE
+	{ RTK_PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0xC822, rtw8822c_hw_spec) },
+#endif
+	{},
+};
+
+static struct pci_driver rtw_pci_driver = {
+	.name = "rtw_pci",
+	.id_table = rtw_pci_id_table,
+	.probe = rtw_pci_probe,
+	.remove = rtw_pci_remove,
+};
+
+struct rtw_hci_ops rtw_pci_ops = {
+	.tx = rtw_pci_tx,
+	.setup = rtw_pci_setup,
+	.start = rtw_pci_start,
+	.stop = rtw_pci_stop,
+
+	.read8 = rtw_pci_read8,
+	.read16 = rtw_pci_read16,
+	.read32 = rtw_pci_read32,
+	.write8 = rtw_pci_write8,
+	.write16 = rtw_pci_write16,
+	.write32 = rtw_pci_write32,
+	.write_data_rsvd_page = rtw_pci_write_data_rsvd_page,
+	.write_data_h2c = rtw_pci_write_data_h2c,
+	.check_avail_desc = rtw_pci_check_avail_desc,
+};
+
+MODULE_DEVICE_TABLE(pci, rtw_pci_id_table);
+
+module_pci_driver(rtw_pci_driver);
+
+MODULE_AUTHOR("Realtek Corporation");
+MODULE_DESCRIPTION("Realtek 802.11ac wireless PCI driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/wireless/realtek/rtw88/pci.h b/drivers/net/wireless/realtek/rtw88/pci.h
new file mode 100644
index 0000000..b35e291
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/pci.h
@@ -0,0 +1,228 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2018  Realtek Corporation.
+ */
+
+#ifndef __RTK_PCI_H_
+#define __RTK_PCI_H_
+
+#define RTK_PCI_DEVICE(vend, dev, hw_config)	\
+	PCI_DEVICE(vend, dev),			\
+	.driver_data = (kernel_ulong_t)&(hw_config),
+
+#define RTK_DEFAULT_TX_DESC_NUM 128
+#define RTK_BEQ_TX_DESC_NUM	256
+
+#define RTK_MAX_RX_DESC_NUM	512
+#define RTK_PCI_RX_BUF_SIZE	9100
+
+#define RTK_PCI_CTRL		0x300
+#define REG_DBI_WDATA_V1	0x03E8
+#define REG_DBI_FLAG_V1		0x03F0
+#define REG_MDIO_V1		0x03F4
+#define REG_PCIE_MIX_CFG	0x03F8
+#define BIT_MDIO_WFLAG_V1	BIT(5)
+
+#define BIT_PCI_BCNQ_FLAG	BIT(4)
+#define RTK_PCI_TXBD_DESA_BCNQ	0x308
+#define RTK_PCI_TXBD_DESA_H2CQ	0x1320
+#define RTK_PCI_TXBD_DESA_MGMTQ	0x310
+#define RTK_PCI_TXBD_DESA_BKQ	0x330
+#define RTK_PCI_TXBD_DESA_BEQ	0x328
+#define RTK_PCI_TXBD_DESA_VIQ	0x320
+#define RTK_PCI_TXBD_DESA_VOQ	0x318
+#define RTK_PCI_TXBD_DESA_HI0Q	0x340
+#define RTK_PCI_RXBD_DESA_MPDUQ	0x338
+
+/* BCNQ is specialized for rsvd page, does not need to specify a number */
+#define RTK_PCI_TXBD_NUM_H2CQ	0x1328
+#define RTK_PCI_TXBD_NUM_MGMTQ	0x380
+#define RTK_PCI_TXBD_NUM_BKQ	0x38A
+#define RTK_PCI_TXBD_NUM_BEQ	0x388
+#define RTK_PCI_TXBD_NUM_VIQ	0x386
+#define RTK_PCI_TXBD_NUM_VOQ	0x384
+#define RTK_PCI_TXBD_NUM_HI0Q	0x38C
+#define RTK_PCI_RXBD_NUM_MPDUQ	0x382
+#define RTK_PCI_TXBD_IDX_H2CQ	0x132C
+#define RTK_PCI_TXBD_IDX_MGMTQ	0x3B0
+#define RTK_PCI_TXBD_IDX_BKQ	0x3AC
+#define RTK_PCI_TXBD_IDX_BEQ	0x3A8
+#define RTK_PCI_TXBD_IDX_VIQ	0x3A4
+#define RTK_PCI_TXBD_IDX_VOQ	0x3A0
+#define RTK_PCI_TXBD_IDX_HI0Q	0x3B8
+#define RTK_PCI_RXBD_IDX_MPDUQ	0x3B4
+
+#define RTK_PCI_TXBD_RWPTR_CLR	0x39C
+
+#define RTK_PCI_HIMR0		0x0B0
+#define RTK_PCI_HISR0		0x0B4
+#define RTK_PCI_HIMR1		0x0B8
+#define RTK_PCI_HISR1		0x0BC
+#define RTK_PCI_HIMR2		0x10B0
+#define RTK_PCI_HISR2		0x10B4
+#define RTK_PCI_HIMR3		0x10B8
+#define RTK_PCI_HISR3		0x10BC
+/* IMR 0 */
+#define IMR_TIMER2		BIT(31)
+#define IMR_TIMER1		BIT(30)
+#define IMR_PSTIMEOUT		BIT(29)
+#define IMR_GTINT4		BIT(28)
+#define IMR_GTINT3		BIT(27)
+#define IMR_TBDER		BIT(26)
+#define IMR_TBDOK		BIT(25)
+#define IMR_TSF_BIT32_TOGGLE	BIT(24)
+#define IMR_BCNDMAINT0		BIT(20)
+#define IMR_BCNDOK0		BIT(16)
+#define IMR_HSISR_IND_ON_INT	BIT(15)
+#define IMR_BCNDMAINT_E		BIT(14)
+#define IMR_ATIMEND		BIT(12)
+#define IMR_HISR1_IND_INT	BIT(11)
+#define IMR_C2HCMD		BIT(10)
+#define IMR_CPWM2		BIT(9)
+#define IMR_CPWM		BIT(8)
+#define IMR_HIGHDOK		BIT(7)
+#define IMR_MGNTDOK		BIT(6)
+#define IMR_BKDOK		BIT(5)
+#define IMR_BEDOK		BIT(4)
+#define IMR_VIDOK		BIT(3)
+#define IMR_VODOK		BIT(2)
+#define IMR_RDU			BIT(1)
+#define IMR_ROK			BIT(0)
+/* IMR 1 */
+#define IMR_TXFIFO_TH_INT	BIT(30)
+#define IMR_BTON_STS_UPDATE	BIT(29)
+#define IMR_MCUERR		BIT(28)
+#define IMR_BCNDMAINT7		BIT(27)
+#define IMR_BCNDMAINT6		BIT(26)
+#define IMR_BCNDMAINT5		BIT(25)
+#define IMR_BCNDMAINT4		BIT(24)
+#define IMR_BCNDMAINT3		BIT(23)
+#define IMR_BCNDMAINT2		BIT(22)
+#define IMR_BCNDMAINT1		BIT(21)
+#define IMR_BCNDOK7		BIT(20)
+#define IMR_BCNDOK6		BIT(19)
+#define IMR_BCNDOK5		BIT(18)
+#define IMR_BCNDOK4		BIT(17)
+#define IMR_BCNDOK3		BIT(16)
+#define IMR_BCNDOK2		BIT(15)
+#define IMR_BCNDOK1		BIT(14)
+#define IMR_ATIMEND_E		BIT(13)
+#define IMR_ATIMEND		BIT(12)
+#define IMR_TXERR		BIT(11)
+#define IMR_RXERR		BIT(10)
+#define IMR_TXFOVW		BIT(9)
+#define IMR_RXFOVW		BIT(8)
+#define IMR_CPU_MGQ_TXDONE	BIT(5)
+#define IMR_PS_TIMER_C		BIT(4)
+#define IMR_PS_TIMER_B		BIT(3)
+#define IMR_PS_TIMER_A		BIT(2)
+#define IMR_CPUMGQ_TX_TIMER	BIT(1)
+/* IMR 3 */
+#define IMR_H2CDOK		BIT(16)
+
+/* one element is reserved to know if the ring is closed */
+static inline int avail_desc(u32 wp, u32 rp, u32 len)
+{
+	if (rp > wp)
+		return rp - wp - 1;
+	else
+		return len - wp + rp - 1;
+}
+
+#define RTK_PCI_TXBD_OWN_OFFSET 15
+#define RTK_PCI_TXBD_BCN_WORK	0x383
+
+struct rtw_pci_tx_buffer_desc {
+	__le16 buf_size;
+	__le16 psb_len;
+	__le32 dma;
+};
+
+struct rtw_pci_tx_data {
+	dma_addr_t dma;
+};
+
+struct rtw_pci_ring {
+	u8 *head;
+	dma_addr_t dma;
+
+	u8 desc_size;
+
+	u32 len;
+	u32 wp;
+	u32 rp;
+};
+
+struct rtw_pci_tx_ring {
+	struct rtw_pci_ring r;
+	struct sk_buff_head queue;
+	bool queue_stopped;
+};
+
+struct rtw_pci_rx_buffer_desc {
+	__le16 buf_size;
+	__le16 total_pkt_size;
+	__le32 dma;
+};
+
+struct rtw_pci_rx_ring {
+	struct rtw_pci_ring r;
+	struct sk_buff *buf[RTK_MAX_RX_DESC_NUM];
+};
+
+struct rtw_pci {
+	struct pci_dev *pdev;
+
+	/* used for pci interrupt */
+	spinlock_t irq_lock;
+	u32 irq_mask[4];
+	bool irq_enabled;
+
+	struct rtw_pci_tx_ring tx_rings[RTK_MAX_TX_QUEUE_NUM];
+	struct rtw_pci_rx_ring rx_rings[RTK_MAX_RX_QUEUE_NUM];
+
+	void __iomem *mmap;
+};
+
+extern struct rtw_hci_ops rtw_pci_ops;
+
+static u32 max_num_of_tx_queue(u8 queue)
+{
+	u32 max_num;
+
+	switch (queue) {
+	case RTW_TX_QUEUE_BE:
+		max_num = RTK_BEQ_TX_DESC_NUM;
+		break;
+	case RTW_TX_QUEUE_BCN:
+		max_num = 1;
+		break;
+	default:
+		max_num = RTK_DEFAULT_TX_DESC_NUM;
+		break;
+	}
+
+	return max_num;
+}
+
+static inline struct
+rtw_pci_tx_data *rtw_pci_get_tx_data(struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+	BUILD_BUG_ON(sizeof(struct rtw_pci_tx_data) >
+		     sizeof(info->status.status_driver_data));
+
+	return (struct rtw_pci_tx_data *)info->status.status_driver_data;
+}
+
+static inline
+struct rtw_pci_tx_buffer_desc *get_tx_buffer_desc(struct rtw_pci_tx_ring *ring,
+						  u32 size)
+{
+	u8 *buf_desc;
+
+	buf_desc = ring->r.head + ring->r.wp * size;
+	return (struct rtw_pci_tx_buffer_desc *)buf_desc;
+}
+
+#endif
-- 
2.7.4