Add the common bits and pieces to add USB support to the RTW88 driver. This is based on https://github.com/ulli-kroll/rtw88-usb.git which itself is first written by Neo Jou. Signed-off-by: neo_jou <neo_jou@xxxxxxxxxxx> Signed-off-by: Hans Ulli Kroll <linux@xxxxxxxxxxxxx> Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- Notes: Changes since v4: - Drop endless loop check again Changes since v3: - Add sanity break out of potentially endless loop - Do not interleave PCI and USB support in Makefile - fix rtwusb->usb_data_index locking - make data_ptr variable in rtw_usb_tx_agg_skb() unnecessary - Some coding style fixup - drop set-but-unused variable in rtw_usb_write_data() - Increase RTW_USB_MAX_RXQ_LEN to 512. I've seen "failed to get rx_queue, overflow\n" trigger otherwise Changes since v2: - Fix buffer length for aggregated tx packets - Increase maximum transmit buffer size to 20KiB as found in downstream drivers - Change register write functions to synchronous accesses instead of just firing a URB without waiting for its completion - requeue rx URBs directly in completion handler rather than having a workqueue for it. Changes since v1: - Make checkpatch.pl clean - Drop WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL flag - Use 'ret' as variable name for return values - Sort variable declarations in reverse Xmas tree order - Change potentially endless loop to a limited loop - Change locking to be more obviously correct - drop unnecessary check for !rtwdev - make sure the refill workqueue is not restarted again after we have cancelled it drivers/net/wireless/realtek/rtw88/Kconfig | 3 + drivers/net/wireless/realtek/rtw88/Makefile | 3 + drivers/net/wireless/realtek/rtw88/mac.c | 3 + drivers/net/wireless/realtek/rtw88/main.c | 4 + drivers/net/wireless/realtek/rtw88/main.h | 4 + drivers/net/wireless/realtek/rtw88/reg.h | 1 + drivers/net/wireless/realtek/rtw88/tx.h | 31 + drivers/net/wireless/realtek/rtw88/usb.c | 911 ++++++++++++++++++++ drivers/net/wireless/realtek/rtw88/usb.h | 107 +++ 9 files changed, 1067 insertions(+) create mode 100644 drivers/net/wireless/realtek/rtw88/usb.c create mode 100644 drivers/net/wireless/realtek/rtw88/usb.h diff --git a/drivers/net/wireless/realtek/rtw88/Kconfig b/drivers/net/wireless/realtek/rtw88/Kconfig index e3d7cb6c12902..1624c5db69bac 100644 --- a/drivers/net/wireless/realtek/rtw88/Kconfig +++ b/drivers/net/wireless/realtek/rtw88/Kconfig @@ -16,6 +16,9 @@ config RTW88_CORE config RTW88_PCI tristate +config RTW88_USB + tristate + config RTW88_8822B tristate diff --git a/drivers/net/wireless/realtek/rtw88/Makefile b/drivers/net/wireless/realtek/rtw88/Makefile index 834c66ec0af9e..2c2b0e5133cdf 100644 --- a/drivers/net/wireless/realtek/rtw88/Makefile +++ b/drivers/net/wireless/realtek/rtw88/Makefile @@ -46,3 +46,6 @@ rtw88_8821ce-objs := rtw8821ce.o obj-$(CONFIG_RTW88_PCI) += rtw88_pci.o rtw88_pci-objs := pci.o + +obj-$(CONFIG_RTW88_USB) += rtw88_usb.o +rtw88_usb-objs := usb.o diff --git a/drivers/net/wireless/realtek/rtw88/mac.c b/drivers/net/wireless/realtek/rtw88/mac.c index 52076e89d59a3..5882fc0fb885b 100644 --- a/drivers/net/wireless/realtek/rtw88/mac.c +++ b/drivers/net/wireless/realtek/rtw88/mac.c @@ -1032,6 +1032,9 @@ static int txdma_queue_mapping(struct rtw_dev *rtwdev) if (rtw_chip_wcpu_11ac(rtwdev)) rtw_write32(rtwdev, REG_H2CQ_CSR, BIT_H2CQ_FULL); + if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_USB) + rtw_write8_set(rtwdev, REG_TXDMA_PQ_MAP, BIT_RXDMA_ARBBW_EN); + return 0; } diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c index 0a2ce7f50f412..888427cf3bdf9 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -1783,6 +1783,10 @@ static int rtw_chip_parameter_setup(struct rtw_dev *rtwdev) rtwdev->hci.rpwm_addr = 0x03d9; rtwdev->hci.cpwm_addr = 0x03da; break; + case RTW_HCI_TYPE_USB: + rtwdev->hci.rpwm_addr = 0xfe58; + rtwdev->hci.cpwm_addr = 0xfe57; + break; default: rtw_err(rtwdev, "unsupported hci type\n"); return -EINVAL; diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h index 77fd48b6cc453..165f299e8e1f9 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -871,6 +871,10 @@ struct rtw_chip_ops { bool is_tx2_path); void (*config_txrx_mode)(struct rtw_dev *rtwdev, u8 tx_path, u8 rx_path, bool is_tx2_path); + /* for USB/SDIO only */ + void (*fill_txdesc_checksum)(struct rtw_dev *rtwdev, + struct rtw_tx_pkt_info *pkt_info, + u8 *txdesc); /* for coex */ void (*coex_set_init)(struct rtw_dev *rtwdev); diff --git a/drivers/net/wireless/realtek/rtw88/reg.h b/drivers/net/wireless/realtek/rtw88/reg.h index 03bd8dc53f72a..8852b24d6c2ac 100644 --- a/drivers/net/wireless/realtek/rtw88/reg.h +++ b/drivers/net/wireless/realtek/rtw88/reg.h @@ -184,6 +184,7 @@ #define BIT_TXDMA_VIQ_MAP(x) \ (((x) & BIT_MASK_TXDMA_VIQ_MAP) << BIT_SHIFT_TXDMA_VIQ_MAP) #define REG_TXDMA_PQ_MAP 0x010C +#define BIT_RXDMA_ARBBW_EN BIT(0) #define BIT_SHIFT_TXDMA_BEQ_MAP 8 #define BIT_MASK_TXDMA_BEQ_MAP 0x3 #define BIT_TXDMA_BEQ_MAP(x) \ diff --git a/drivers/net/wireless/realtek/rtw88/tx.h b/drivers/net/wireless/realtek/rtw88/tx.h index 8419603adce4a..a2f3ac326041b 100644 --- a/drivers/net/wireless/realtek/rtw88/tx.h +++ b/drivers/net/wireless/realtek/rtw88/tx.h @@ -71,6 +71,14 @@ le32p_replace_bits((__le32 *)(txdesc) + 0x03, value, BIT(15)) #define SET_TX_DESC_BT_NULL(txdesc, value) \ le32p_replace_bits((__le32 *)(txdesc) + 0x02, value, BIT(23)) +#define SET_TX_DESC_TXDESC_CHECKSUM(txdesc, value) \ + le32p_replace_bits((__le32 *)(txdesc) + 0x07, value, GENMASK(15, 0)) +#define SET_TX_DESC_DMA_TXAGG_NUM(txdesc, value) \ + le32p_replace_bits((__le32 *)(txdesc) + 0x07, value, GENMASK(31, 24)) +#define GET_TX_DESC_PKT_OFFSET(txdesc) \ + le32_get_bits(*((__le32 *)(txdesc) + 0x01), GENMASK(28, 24)) +#define GET_TX_DESC_QSEL(txdesc) \ + le32_get_bits(*((__le32 *)(txdesc) + 0x01), GENMASK(12, 8)) enum rtw_tx_desc_queue_select { TX_DESC_QSEL_TID0 = 0, @@ -123,4 +131,27 @@ rtw_tx_write_data_h2c_get(struct rtw_dev *rtwdev, struct rtw_tx_pkt_info *pkt_info, u8 *buf, u32 size); +static inline +void fill_txdesc_checksum_common(u8 *txdesc, size_t words) +{ + __le16 chksum = 0; + __le16 *data = (__le16 *)(txdesc); + + SET_TX_DESC_TXDESC_CHECKSUM(txdesc, 0x0000); + + while (words--) + chksum ^= *data++; + + SET_TX_DESC_TXDESC_CHECKSUM(txdesc, __le16_to_cpu(chksum)); +} + +static inline void rtw_tx_fill_txdesc_checksum(struct rtw_dev *rtwdev, + struct rtw_tx_pkt_info *pkt_info, + u8 *txdesc) +{ + const struct rtw_chip_info *chip = rtwdev->chip; + + chip->ops->fill_txdesc_checksum(rtwdev, pkt_info, txdesc); +} + #endif diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c new file mode 100644 index 0000000000000..4ef38279b64c9 --- /dev/null +++ b/drivers/net/wireless/realtek/rtw88/usb.c @@ -0,0 +1,911 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* Copyright(c) 2018-2019 Realtek Corporation + */ + +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/mutex.h> +#include "main.h" +#include "debug.h" +#include "reg.h" +#include "tx.h" +#include "rx.h" +#include "fw.h" +#include "ps.h" +#include "usb.h" + +#define RTW_USB_MAX_RXQ_LEN 512 + +struct rtw_usb_txcb { + struct rtw_dev *rtwdev; + struct sk_buff_head tx_ack_queue; +}; + +static void rtw_usb_fill_tx_checksum(struct rtw_usb *rtwusb, + struct sk_buff *skb, int agg_num) +{ + struct rtw_dev *rtwdev = rtwusb->rtwdev; + struct rtw_tx_pkt_info pkt_info; + + SET_TX_DESC_DMA_TXAGG_NUM(skb->data, agg_num); + pkt_info.pkt_offset = GET_TX_DESC_PKT_OFFSET(skb->data); + rtw_tx_fill_txdesc_checksum(rtwdev, &pkt_info, skb->data); +} + +static u32 rtw_usb_read(struct rtw_dev *rtwdev, u32 addr, u16 len) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + struct usb_device *udev = rtwusb->udev; + __le32 *data; + unsigned long flags; + int idx, ret; + static int count; + + spin_lock_irqsave(&rtwusb->usb_lock, flags); + + idx = rtwusb->usb_data_index; + rtwusb->usb_data_index = (idx + 1) & (RTW_USB_MAX_RXTX_COUNT - 1); + + spin_unlock_irqrestore(&rtwusb->usb_lock, flags); + + data = &rtwusb->usb_data[idx]; + + ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), + RTW_USB_CMD_REQ, RTW_USB_CMD_READ, addr, + RTW_USB_VENQT_CMD_IDX, data, len, 1000); + if (ret < 0 && ret != -ENODEV && count++ < 4) + rtw_err(rtwdev, "read register 0x%x failed with %d\n", + addr, ret); + + return le32_to_cpu(*data); +} + +static u8 rtw_usb_read8(struct rtw_dev *rtwdev, u32 addr) +{ + return (u8)rtw_usb_read(rtwdev, addr, 1); +} + +static u16 rtw_usb_read16(struct rtw_dev *rtwdev, u32 addr) +{ + return (u16)rtw_usb_read(rtwdev, addr, 2); +} + +static u32 rtw_usb_read32(struct rtw_dev *rtwdev, u32 addr) +{ + return (u32)rtw_usb_read(rtwdev, addr, 4); +} + +static void rtw_usb_write(struct rtw_dev *rtwdev, u32 addr, u32 val, int len) +{ + struct rtw_usb *rtwusb = (struct rtw_usb *)rtwdev->priv; + struct usb_device *udev = rtwusb->udev; + unsigned long flags; + __le32 *data; + int idx, ret; + static int count; + + spin_lock_irqsave(&rtwusb->usb_lock, flags); + + idx = rtwusb->usb_data_index; + rtwusb->usb_data_index = (idx + 1) & (RTW_USB_MAX_RXTX_COUNT - 1); + + spin_unlock_irqrestore(&rtwusb->usb_lock, flags); + + data = &rtwusb->usb_data[idx]; + + *data = cpu_to_le32(val); + + ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + RTW_USB_CMD_REQ, RTW_USB_CMD_WRITE, + addr, 0, data, len, 30000); + if (ret < 0 && ret != -ENODEV && count++ < 4) + rtw_err(rtwdev, "write register 0x%x failed with %d\n", + addr, ret); +} + +static void rtw_usb_write8(struct rtw_dev *rtwdev, u32 addr, u8 val) +{ + rtw_usb_write(rtwdev, addr, val, 1); +} + +static void rtw_usb_write16(struct rtw_dev *rtwdev, u32 addr, u16 val) +{ + rtw_usb_write(rtwdev, addr, val, 2); +} + +static void rtw_usb_write32(struct rtw_dev *rtwdev, u32 addr, u32 val) +{ + rtw_usb_write(rtwdev, addr, val, 4); +} + +static int rtw_usb_parse(struct rtw_dev *rtwdev, + struct usb_interface *interface) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + struct usb_host_interface *host_interface = &interface->altsetting[0]; + struct usb_interface_descriptor *interface_desc = &host_interface->desc; + struct usb_endpoint_descriptor *endpoint; + struct usb_device *usbd = interface_to_usbdev(interface); + int num_out_pipes = 0; + int i; + u8 num; + + for (i = 0; i < interface_desc->bNumEndpoints; i++) { + endpoint = &host_interface->endpoint[i].desc; + num = usb_endpoint_num(endpoint); + + if (usb_endpoint_dir_in(endpoint) && + usb_endpoint_xfer_bulk(endpoint)) { + if (rtwusb->pipe_in) { + rtw_err(rtwdev, "IN pipes overflow\n"); + return -EINVAL; + } + + rtwusb->pipe_in = num; + } + + if (usb_endpoint_dir_in(endpoint) && + usb_endpoint_xfer_int(endpoint)) { + if (rtwusb->pipe_interrupt) { + rtw_err(rtwdev, "INT pipes overflow\n"); + return -EINVAL; + } + + rtwusb->pipe_interrupt = num; + } + + if (usb_endpoint_dir_out(endpoint) && + usb_endpoint_xfer_bulk(endpoint)) { + if (num_out_pipes >= ARRAY_SIZE(rtwusb->out_ep)) { + rtw_err(rtwdev, "OUT pipes overflow\n"); + return -EINVAL; + } + + rtwusb->out_ep[num_out_pipes++] = num; + } + } + + switch (usbd->speed) { + case USB_SPEED_LOW: + case USB_SPEED_FULL: + rtwusb->bulkout_size = RTW_USB_FULL_SPEED_BULK_SIZE; + break; + case USB_SPEED_HIGH: + rtwusb->bulkout_size = RTW_USB_HIGH_SPEED_BULK_SIZE; + break; + case USB_SPEED_SUPER: + rtwusb->bulkout_size = RTW_USB_SUPER_SPEED_BULK_SIZE; + break; + default: + rtw_err(rtwdev, "failed to detect usb speed\n"); + return -EINVAL; + } + + rtwdev->hci.bulkout_num = num_out_pipes; + + switch (num_out_pipes) { + case 4: + case 3: + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID0] = 2; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID1] = 2; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID2] = 2; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID3] = 2; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID4] = 1; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID5] = 1; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID6] = 0; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID7] = 0; + break; + case 2: + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID0] = 1; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID1] = 1; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID2] = 1; + rtwusb->qsel_to_ep[TX_DESC_QSEL_TID3] = 1; + break; + case 1: + break; + default: + rtw_err(rtwdev, "failed to get out_pipes(%d)\n", num_out_pipes); + return -EINVAL; + } + + return 0; +} + +static void rtw_usb_write_port_tx_complete(struct urb *urb) +{ + struct rtw_usb_txcb *txcb = urb->context; + struct rtw_dev *rtwdev = txcb->rtwdev; + struct ieee80211_hw *hw = rtwdev->hw; + + while (true) { + struct sk_buff *skb = skb_dequeue(&txcb->tx_ack_queue); + struct ieee80211_tx_info *info; + struct rtw_usb_tx_data *tx_data; + + if (!skb) + break; + + info = IEEE80211_SKB_CB(skb); + tx_data = rtw_usb_get_tx_data(skb); + + /* enqueue to wait for tx report */ + if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) { + rtw_tx_report_enqueue(rtwdev, skb, tx_data->sn); + continue; + } + + /* always ACK for others, then they won't be marked as drop */ + ieee80211_tx_info_clear_status(info); + if (info->flags & IEEE80211_TX_CTL_NO_ACK) + info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; + else + info->flags |= IEEE80211_TX_STAT_ACK; + + ieee80211_tx_status_irqsafe(hw, skb); + } + + kfree(txcb); +} + +static int qsel_to_ep(struct rtw_usb *rtwusb, unsigned int qsel) +{ + if (qsel >= ARRAY_SIZE(rtwusb->qsel_to_ep)) + return 0; + + return rtwusb->qsel_to_ep[qsel]; +} + +static int rtw_usb_write_port(struct rtw_dev *rtwdev, u8 qsel, struct sk_buff *skb, + usb_complete_t cb, void *context) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + struct usb_device *usbd = rtwusb->udev; + struct urb *urb; + unsigned int pipe; + int ret; + int ep = qsel_to_ep(rtwusb, qsel); + + pipe = usb_sndbulkpipe(usbd, rtwusb->out_ep[ep]); + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) + return -ENOMEM; + + usb_fill_bulk_urb(urb, usbd, pipe, skb->data, skb->len, cb, context); + ret = usb_submit_urb(urb, GFP_ATOMIC); + + usb_free_urb(urb); + + return ret; +} + +static bool rtw_usb_tx_agg_skb(struct rtw_usb *rtwusb, struct sk_buff_head *list) +{ + struct rtw_dev *rtwdev = rtwusb->rtwdev; + struct rtw_usb_txcb *txcb; + struct sk_buff *skb_head; + struct sk_buff *skb_iter; + int agg_num = 0; + unsigned int align_next = 0; + + if (skb_queue_empty(list)) + return false; + + txcb = kmalloc(sizeof(*txcb), GFP_ATOMIC); + if (!txcb) + return false; + + txcb->rtwdev = rtwdev; + skb_queue_head_init(&txcb->tx_ack_queue); + + skb_iter = skb_dequeue(list); + + if (skb_queue_empty(list)) { + skb_head = skb_iter; + goto queue; + } + + skb_head = dev_alloc_skb(RTW_USB_MAX_XMITBUF_SZ); + if (!skb_head) { + skb_head = skb_iter; + goto queue; + } + + while (skb_iter) { + unsigned long flags; + + skb_put(skb_head, align_next); + skb_put_data(skb_head, skb_iter->data, skb_iter->len); + + align_next = ALIGN(skb_iter->len, 8) - skb_iter->len; + + agg_num++; + + skb_queue_tail(&txcb->tx_ack_queue, skb_iter); + + spin_lock_irqsave(&list->lock, flags); + + skb_iter = skb_peek(list); + + if (skb_iter && skb_iter->len + skb_head->len <= RTW_USB_MAX_XMITBUF_SZ) + __skb_unlink(skb_iter, list); + else + skb_iter = NULL; + spin_unlock_irqrestore(&list->lock, flags); + } + + if (agg_num > 1) + rtw_usb_fill_tx_checksum(rtwusb, skb_head, agg_num); + +queue: + skb_queue_tail(&txcb->tx_ack_queue, skb_head); + + rtw_usb_write_port(rtwdev, GET_TX_DESC_QSEL(skb_head->data), skb_head, + rtw_usb_write_port_tx_complete, txcb); + + return true; +} + +static void rtw_usb_tx_handler(struct work_struct *work) +{ + struct rtw_usb *rtwusb = container_of(work, struct rtw_usb, tx_work); + int i, limit; + + for (i = ARRAY_SIZE(rtwusb->tx_queue) - 1; i >= 0; i--) { + for (limit = 0; limit < 200; limit++) { + struct sk_buff_head *list = &rtwusb->tx_queue[i]; + + if (!rtw_usb_tx_agg_skb(rtwusb, list)) + break; + } + } +} + +static void rtw_usb_tx_queue_purge(struct rtw_usb *rtwusb) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++) + skb_queue_purge(&rtwusb->tx_queue[i]); +} + +static void rtw_usb_write_port_complete(struct urb *urb) +{ + struct sk_buff *skb = urb->context; + + dev_kfree_skb_any(skb); +} + +static int rtw_usb_write_data(struct rtw_dev *rtwdev, + struct rtw_tx_pkt_info *pkt_info, + u8 *buf) +{ + const struct rtw_chip_info *chip = rtwdev->chip; + struct sk_buff *skb; + unsigned int desclen, headsize, size; + u8 qsel; + int ret = 0; + + size = pkt_info->tx_pkt_size; + qsel = pkt_info->qsel; + desclen = chip->tx_pkt_desc_sz; + headsize = pkt_info->offset ? pkt_info->offset : desclen; + + skb = dev_alloc_skb(headsize + size); + if (unlikely(!skb)) + return -ENOMEM; + + skb_reserve(skb, headsize); + skb_put_data(skb, buf, size); + skb_push(skb, headsize); + memset(skb->data, 0, headsize); + rtw_tx_fill_tx_desc(pkt_info, skb); + rtw_tx_fill_txdesc_checksum(rtwdev, pkt_info, skb->data); + + ret = rtw_usb_write_port(rtwdev, qsel, skb, + rtw_usb_write_port_complete, skb); + if (unlikely(ret)) + rtw_err(rtwdev, "failed to do USB write, ret=%d\n", ret); + + return ret; +} + +static int rtw_usb_write_data_rsvd_page(struct rtw_dev *rtwdev, u8 *buf, + u32 size) +{ + const struct rtw_chip_info *chip = rtwdev->chip; + struct rtw_usb *rtwusb; + struct rtw_tx_pkt_info pkt_info = {0}; + u32 len, desclen; + + rtwusb = rtw_get_usb_priv(rtwdev); + + pkt_info.tx_pkt_size = size; + pkt_info.qsel = TX_DESC_QSEL_BEACON; + + desclen = chip->tx_pkt_desc_sz; + len = desclen + size; + if (len % rtwusb->bulkout_size == 0) { + len += RTW_USB_PACKET_OFFSET_SZ; + pkt_info.offset = desclen + RTW_USB_PACKET_OFFSET_SZ; + pkt_info.pkt_offset = 1; + } else { + pkt_info.offset = desclen; + } + + return rtw_usb_write_data(rtwdev, &pkt_info, buf); +} + +static int rtw_usb_write_data_h2c(struct rtw_dev *rtwdev, u8 *buf, u32 size) +{ + struct rtw_tx_pkt_info pkt_info = {0}; + + pkt_info.tx_pkt_size = size; + pkt_info.qsel = TX_DESC_QSEL_H2C; + + return rtw_usb_write_data(rtwdev, &pkt_info, buf); +} + +static u8 rtw_usb_tx_queue_mapping_to_qsel(struct sk_buff *skb) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + __le16 fc = hdr->frame_control; + u8 qsel; + + if (unlikely(ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc))) + qsel = TX_DESC_QSEL_MGMT; + else if (skb_get_queue_mapping(skb) <= IEEE80211_AC_BK) + qsel = skb->priority; + else + qsel = TX_DESC_QSEL_BEACON; + + return qsel; +} + +static int rtw_usb_tx_write(struct rtw_dev *rtwdev, + struct rtw_tx_pkt_info *pkt_info, + struct sk_buff *skb) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + const struct rtw_chip_info *chip = rtwdev->chip; + struct rtw_usb_tx_data *tx_data; + u8 *pkt_desc; + int ep; + + pkt_desc = skb_push(skb, chip->tx_pkt_desc_sz); + memset(pkt_desc, 0, chip->tx_pkt_desc_sz); + pkt_info->qsel = rtw_usb_tx_queue_mapping_to_qsel(skb); + ep = qsel_to_ep(rtwusb, pkt_info->qsel); + rtw_tx_fill_tx_desc(pkt_info, skb); + rtw_tx_fill_txdesc_checksum(rtwdev, pkt_info, skb->data); + tx_data = rtw_usb_get_tx_data(skb); + tx_data->sn = pkt_info->sn; + + skb_queue_tail(&rtwusb->tx_queue[ep], skb); + + return 0; +} + +static void rtw_usb_tx_kick_off(struct rtw_dev *rtwdev) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + + queue_work(rtwusb->txwq, &rtwusb->tx_work); +} + +static void rtw_usb_rx_handler(struct work_struct *work) +{ + struct rtw_usb *rtwusb = container_of(work, struct rtw_usb, rx_work); + struct rtw_dev *rtwdev = rtwusb->rtwdev; + const struct rtw_chip_info *chip = rtwdev->chip; + struct rtw_rx_pkt_stat pkt_stat; + struct ieee80211_rx_status rx_status; + struct sk_buff *skb; + u32 pkt_desc_sz = chip->rx_pkt_desc_sz; + u32 pkt_offset; + u8 *rx_desc; + int limit; + + for (limit = 0; limit < 200; limit++) { + skb = skb_dequeue(&rtwusb->rx_queue); + if (!skb) + break; + + rx_desc = skb->data; + chip->ops->query_rx_desc(rtwdev, rx_desc, &pkt_stat, + &rx_status); + pkt_offset = pkt_desc_sz + pkt_stat.drv_info_sz + + pkt_stat.shift; + + if (pkt_stat.is_c2h) { + skb_put(skb, pkt_stat.pkt_len + pkt_offset); + rtw_fw_c2h_cmd_rx_irqsafe(rtwdev, pkt_offset, skb); + continue; + } + + if (skb_queue_len(&rtwusb->rx_queue) >= RTW_USB_MAX_RXQ_LEN) { + rtw_err(rtwdev, "failed to get rx_queue, overflow\n"); + dev_kfree_skb_any(skb); + continue; + } + + skb_put(skb, pkt_stat.pkt_len); + skb_reserve(skb, pkt_offset); + memcpy(skb->cb, &rx_status, sizeof(rx_status)); + ieee80211_rx_irqsafe(rtwdev->hw, skb); + } +} + +static void rtw_usb_read_port_complete(struct urb *urb); + +static void rtw_usb_rx_resubmit(struct rtw_usb *rtwusb, struct rx_usb_ctrl_block *rxcb) +{ + struct rtw_dev *rtwdev = rtwusb->rtwdev; + int error; + + rxcb->rx_skb = alloc_skb(RTW_USB_MAX_RECVBUF_SZ, GFP_ATOMIC); + if (!rxcb->rx_skb) + return; + + usb_fill_bulk_urb(rxcb->rx_urb, rtwusb->udev, + usb_rcvbulkpipe(rtwusb->udev, rtwusb->pipe_in), + rxcb->rx_skb->data, RTW_USB_MAX_RECVBUF_SZ, + rtw_usb_read_port_complete, rxcb); + + error = usb_submit_urb(rxcb->rx_urb, GFP_ATOMIC); + if (error) { + kfree_skb(rxcb->rx_skb); + if (error != -ENODEV) + rtw_err(rtwdev, "Err sending rx data urb %d\n", + error); + } +} + +static void rtw_usb_read_port_complete(struct urb *urb) +{ + struct rx_usb_ctrl_block *rxcb = urb->context; + struct rtw_dev *rtwdev = rxcb->rtwdev; + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + struct sk_buff *skb = rxcb->rx_skb; + + if (urb->status == 0) { + if (urb->actual_length >= RTW_USB_MAX_RECVBUF_SZ || + urb->actual_length < 24) { + rtw_err(rtwdev, "failed to get urb length:%d\n", + urb->actual_length); + if (skb) + dev_kfree_skb_any(skb); + } else { + skb_queue_tail(&rtwusb->rx_queue, skb); + queue_work(rtwusb->rxwq, &rtwusb->rx_work); + } + rtw_usb_rx_resubmit(rtwusb, rxcb); + } else { + switch (urb->status) { + case -EINVAL: + case -EPIPE: + case -ENODEV: + case -ESHUTDOWN: + case -ENOENT: + case -EPROTO: + case -EILSEQ: + case -ETIME: + case -ECOMM: + case -EOVERFLOW: + case -EINPROGRESS: + break; + default: + rtw_err(rtwdev, "status %d\n", urb->status); + break; + } + if (skb) + dev_kfree_skb_any(skb); + } +} + +static void rtw_usb_cancel_rx_bufs(struct rtw_usb *rtwusb) +{ + struct rx_usb_ctrl_block *rxcb; + int i; + + for (i = 0; i < RTW_USB_RXCB_NUM; i++) { + rxcb = &rtwusb->rx_cb[i]; + if (rxcb->rx_urb) + usb_kill_urb(rxcb->rx_urb); + } +} + +static void rtw_usb_free_rx_bufs(struct rtw_usb *rtwusb) +{ + struct rx_usb_ctrl_block *rxcb; + int i; + + for (i = 0; i < RTW_USB_RXCB_NUM; i++) { + rxcb = &rtwusb->rx_cb[i]; + if (rxcb->rx_urb) { + usb_kill_urb(rxcb->rx_urb); + usb_free_urb(rxcb->rx_urb); + } + } +} + +static int rtw_usb_alloc_rx_bufs(struct rtw_usb *rtwusb) +{ + int i; + + for (i = 0; i < RTW_USB_RXCB_NUM; i++) { + struct rx_usb_ctrl_block *rxcb = &rtwusb->rx_cb[i]; + + rxcb->n = i; + rxcb->rtwdev = rtwusb->rtwdev; + rxcb->rx_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!rxcb->rx_urb) + goto err; + } + + return 0; +err: + rtw_usb_free_rx_bufs(rtwusb); + return -ENOMEM; +} + +static int rtw_usb_setup(struct rtw_dev *rtwdev) +{ + /* empty function for rtw_hci_ops */ + return 0; +} + +static int rtw_usb_start(struct rtw_dev *rtwdev) +{ + return 0; +} + +static void rtw_usb_stop(struct rtw_dev *rtwdev) +{ +} + +static void rtw_usb_deep_ps(struct rtw_dev *rtwdev, bool enter) +{ + /* empty function for rtw_hci_ops */ +} + +static void rtw_usb_link_ps(struct rtw_dev *rtwdev, bool enter) +{ + /* empty function for rtw_hci_ops */ +} + +static void rtw_usb_interface_cfg(struct rtw_dev *rtwdev) +{ + /* empty function for rtw_hci_ops */ +} + +static struct rtw_hci_ops rtw_usb_ops = { + .tx_write = rtw_usb_tx_write, + .tx_kick_off = rtw_usb_tx_kick_off, + .setup = rtw_usb_setup, + .start = rtw_usb_start, + .stop = rtw_usb_stop, + .deep_ps = rtw_usb_deep_ps, + .link_ps = rtw_usb_link_ps, + .interface_cfg = rtw_usb_interface_cfg, + + .write8 = rtw_usb_write8, + .write16 = rtw_usb_write16, + .write32 = rtw_usb_write32, + .read8 = rtw_usb_read8, + .read16 = rtw_usb_read16, + .read32 = rtw_usb_read32, + + .write_data_rsvd_page = rtw_usb_write_data_rsvd_page, + .write_data_h2c = rtw_usb_write_data_h2c, +}; + +static int rtw_usb_init_rx(struct rtw_dev *rtwdev) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + int i; + + rtwusb->rxwq = create_singlethread_workqueue("rtw88_usb: rx wq"); + if (!rtwusb->rxwq) { + rtw_err(rtwdev, "failed to create RX work queue\n"); + return -ENOMEM; + } + + skb_queue_head_init(&rtwusb->rx_queue); + + INIT_WORK(&rtwusb->rx_work, rtw_usb_rx_handler); + + for (i = 0; i < RTW_USB_RXCB_NUM; i++) { + struct rx_usb_ctrl_block *rxcb = &rtwusb->rx_cb[i]; + + rtw_usb_rx_resubmit(rtwusb, rxcb); + } + + return 0; +} + +static void rtw_usb_deinit_rx(struct rtw_dev *rtwdev) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + + skb_queue_purge(&rtwusb->rx_queue); + + flush_workqueue(rtwusb->rxwq); + destroy_workqueue(rtwusb->rxwq); +} + +static int rtw_usb_init_tx(struct rtw_dev *rtwdev) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + int i; + + rtwusb->txwq = create_singlethread_workqueue("rtw88_usb: tx wq"); + if (!rtwusb->txwq) { + rtw_err(rtwdev, "failed to create TX work queue\n"); + return -ENOMEM; + } + + for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++) + skb_queue_head_init(&rtwusb->tx_queue[i]); + + INIT_WORK(&rtwusb->tx_work, rtw_usb_tx_handler); + + return 0; +} + +static void rtw_usb_deinit_tx(struct rtw_dev *rtwdev) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + + rtw_usb_tx_queue_purge(rtwusb); + flush_workqueue(rtwusb->txwq); + destroy_workqueue(rtwusb->txwq); +} + +static int rtw_usb_intf_init(struct rtw_dev *rtwdev, + struct usb_interface *intf) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + struct usb_device *udev = usb_get_dev(interface_to_usbdev(intf)); + int ret; + + rtwusb->udev = udev; + ret = rtw_usb_parse(rtwdev, intf); + if (ret) + return ret; + + rtwusb->usb_data = kcalloc(RTW_USB_MAX_RXTX_COUNT, sizeof(u32), + GFP_KERNEL); + if (!rtwusb->usb_data) + return -ENOMEM; + + usb_set_intfdata(intf, rtwdev->hw); + + SET_IEEE80211_DEV(rtwdev->hw, &intf->dev); + spin_lock_init(&rtwusb->usb_lock); + + return 0; +} + +static void rtw_usb_intf_deinit(struct rtw_dev *rtwdev, + struct usb_interface *intf) +{ + struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); + + usb_put_dev(rtwusb->udev); + usb_set_intfdata(intf, NULL); +} + +int rtw_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) +{ + struct rtw_dev *rtwdev; + struct ieee80211_hw *hw; + struct rtw_usb *rtwusb; + int drv_data_size; + int ret; + + drv_data_size = sizeof(struct rtw_dev) + sizeof(struct rtw_usb); + hw = ieee80211_alloc_hw(drv_data_size, &rtw_ops); + if (!hw) + return -ENOMEM; + + rtwdev = hw->priv; + rtwdev->hw = hw; + rtwdev->dev = &intf->dev; + rtwdev->chip = (struct rtw_chip_info *)id->driver_info; + rtwdev->hci.ops = &rtw_usb_ops; + rtwdev->hci.type = RTW_HCI_TYPE_USB; + + rtwusb = rtw_get_usb_priv(rtwdev); + rtwusb->rtwdev = rtwdev; + + ret = rtw_usb_alloc_rx_bufs(rtwusb); + if (ret) + return ret; + + ret = rtw_core_init(rtwdev); + if (ret) + goto err_release_hw; + + ret = rtw_usb_intf_init(rtwdev, intf); + if (ret) { + rtw_err(rtwdev, "failed to init USB interface\n"); + goto err_deinit_core; + } + + ret = rtw_usb_init_tx(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to init USB TX\n"); + goto err_destroy_usb; + } + + ret = rtw_usb_init_rx(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to init USB RX\n"); + goto err_destroy_txwq; + } + + ret = rtw_chip_info_setup(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to setup chip information\n"); + goto err_destroy_rxwq; + } + + ret = rtw_register_hw(rtwdev, rtwdev->hw); + if (ret) { + rtw_err(rtwdev, "failed to register hw\n"); + goto err_destroy_rxwq; + } + + return 0; + +err_destroy_rxwq: + rtw_usb_deinit_rx(rtwdev); + +err_destroy_txwq: + rtw_usb_deinit_tx(rtwdev); + +err_destroy_usb: + rtw_usb_intf_deinit(rtwdev, intf); + +err_deinit_core: + rtw_core_deinit(rtwdev); + +err_release_hw: + ieee80211_free_hw(hw); + + return ret; +} +EXPORT_SYMBOL(rtw_usb_probe); + +void rtw_usb_disconnect(struct usb_interface *intf) +{ + struct ieee80211_hw *hw = usb_get_intfdata(intf); + struct rtw_dev *rtwdev; + struct rtw_usb *rtwusb; + + if (!hw) + return; + + rtwdev = hw->priv; + rtwusb = rtw_get_usb_priv(rtwdev); + + rtw_usb_cancel_rx_bufs(rtwusb); + + rtw_unregister_hw(rtwdev, hw); + rtw_usb_deinit_tx(rtwdev); + rtw_usb_deinit_rx(rtwdev); + + if (rtwusb->udev->state != USB_STATE_NOTATTACHED) + usb_reset_device(rtwusb->udev); + + rtw_usb_free_rx_bufs(rtwusb); + + rtw_usb_intf_deinit(rtwdev, intf); + rtw_core_deinit(rtwdev); + ieee80211_free_hw(hw); +} +EXPORT_SYMBOL(rtw_usb_disconnect); + +MODULE_AUTHOR("Realtek Corporation"); +MODULE_DESCRIPTION("Realtek 802.11ac wireless USB driver"); +MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/net/wireless/realtek/rtw88/usb.h b/drivers/net/wireless/realtek/rtw88/usb.h new file mode 100644 index 0000000000000..30647f0dd61c6 --- /dev/null +++ b/drivers/net/wireless/realtek/rtw88/usb.h @@ -0,0 +1,107 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* Copyright(c) 2018-2019 Realtek Corporation + */ + +#ifndef __RTW_USB_H_ +#define __RTW_USB_H_ + +#define FW_8192C_START_ADDRESS 0x1000 +#define FW_8192C_END_ADDRESS 0x5fff + +#define RTW_USB_MAX_RXTX_COUNT 128 +#define RTW_USB_VENQT_MAX_BUF_SIZE 254 +#define MAX_USBCTRL_VENDORREQ_TIMES 10 + +#define RTW_USB_CMD_READ 0xc0 +#define RTW_USB_CMD_WRITE 0x40 +#define RTW_USB_CMD_REQ 0x05 + +#define RTW_USB_VENQT_CMD_IDX 0x00 + +#define RTW_USB_SUPER_SPEED_BULK_SIZE 1024 +#define RTW_USB_HIGH_SPEED_BULK_SIZE 512 +#define RTW_USB_FULL_SPEED_BULK_SIZE 64 + +#define RTW_USB_TX_SEL_HQ BIT(0) +#define RTW_USB_TX_SEL_LQ BIT(1) +#define RTW_USB_TX_SEL_NQ BIT(2) +#define RTW_USB_TX_SEL_EQ BIT(3) + +#define RTW_USB_BULK_IN_ADDR 0x80 +#define RTW_USB_INT_IN_ADDR 0x81 + +#define RTW_USB_HW_QUEUE_ENTRY 8 + +#define RTW_USB_PACKET_OFFSET_SZ 8 +#define RTW_USB_MAX_XMITBUF_SZ (1024 * 20) +#define RTW_USB_MAX_RECVBUF_SZ 32768 + +#define RTW_USB_RECVBUFF_ALIGN_SZ 8 + +#define RTW_USB_RXAGG_SIZE 6 +#define RTW_USB_RXAGG_TIMEOUT 10 + +#define RTW_USB_RXCB_NUM 4 + +#define RTW_USB_EP_MAX 4 + +#define TX_DESC_QSEL_MAX 20 + +#define RTW_USB_VENDOR_ID_REALTEK 0x0bda + +static inline struct rtw_usb *rtw_get_usb_priv(struct rtw_dev *rtwdev) +{ + return (struct rtw_usb *)rtwdev->priv; +} + +struct rx_usb_ctrl_block { + struct rtw_dev *rtwdev; + struct urb *rx_urb; + struct sk_buff *rx_skb; + int n; +}; + +struct rtw_usb_tx_data { + u8 sn; +}; + +struct rtw_usb { + struct rtw_dev *rtwdev; + struct usb_device *udev; + + /* protects usb_data_index */ + spinlock_t usb_lock; + __le32 *usb_data; + unsigned int usb_data_index; + + u32 bulkout_size; + u8 pipe_interrupt; + u8 pipe_in; + u8 out_ep[RTW_USB_EP_MAX]; + u8 qsel_to_ep[TX_DESC_QSEL_MAX]; + u8 usb_txagg_num; + + struct workqueue_struct *txwq, *rxwq; + + struct sk_buff_head tx_queue[RTW_USB_EP_MAX]; + struct work_struct tx_work; + + struct rx_usb_ctrl_block rx_cb[RTW_USB_RXCB_NUM]; + struct sk_buff_head rx_queue; + struct work_struct rx_work; +}; + +static inline struct rtw_usb_tx_data *rtw_usb_get_tx_data(struct sk_buff *skb) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + + BUILD_BUG_ON(sizeof(struct rtw_usb_tx_data) > + sizeof(info->status.status_driver_data)); + + return (struct rtw_usb_tx_data *)info->status.status_driver_data; +} + +int rtw_usb_probe(struct usb_interface *intf, const struct usb_device_id *id); +void rtw_usb_disconnect(struct usb_interface *intf); + +#endif -- 2.30.2
