| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Yan-Hsuan Chuang | 6608 | 100.00% | 1 | 100.00% |
| Total | 6608 | 1 |
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* Copyright(c) 2018-2019 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(RTK_PCI_RX_BUF_SIZE); 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); if (!skb) { allocated = i; ret = -ENOMEM; goto err_out; } 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; dev_kfree_skb_any(skb); 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: 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); rtw_err(rtwdev, "failed to init rx buffer\n"); 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); /* rest H2C Queue index */ rtw_write32_set(rtwdev, RTK_PCI_TXBD_H2CQ_CSR, BIT_CLR_H2CQ_HOST_IDX); rtw_write32_set(rtwdev, RTK_PCI_TXBD_H2CQ_CSR, BIT_CLR_H2CQ_HW_IDX); } 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 void rtw_pci_dma_reset(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci) { /* reset dma and rx tag */ rtw_write32_set(rtwdev, RTK_PCI_CTRL, BIT_RST_TRXDMA_INTF | BIT_RX_TAG_EN); rtwpci->rx_tag = 0; } static int rtw_pci_start(struct rtw_dev *rtwdev) { struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; unsigned long flags; rtw_pci_dma_reset(rtwdev, rtwpci); 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_pci *rtwpci = (struct rtw_pci *)rtwdev->priv; 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; buf_desc = (struct rtw_pci_rx_buffer_desc *)(rx_ring->r.head + idx * desc_sz); total_pkt_size = le16_to_cpu(buf_desc->total_pkt_size); /* rx tag mismatch, throw a warning */ if (total_pkt_size != rtwpci->rx_tag) rtw_warn(rtwdev, "pci bus timeout, check dma status\n"); rtwpci->rx_tag = (rtwpci->rx_tag + 1) % RX_TAG_MAX; } 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; tx_data->sn = pkt_info->sn; 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 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; } skb_pull(skb, rtwdev->chip->tx_pkt_desc_sz); info = IEEE80211_SKB_CB(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 */ if (info->flags & IEEE80211_TX_CTL_NO_ACK) info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; else info->flags |= IEEE80211_TX_STAT_ACK; ieee80211_tx_info_clear_status(info); 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); if (WARN(!new, "rx routine starvation\n")) return; 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]; spin_lock(&rtwpci->irq_lock); if (!rtwpci->irq_enabled) goto out; 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); out: spin_unlock(&rtwpci->irq_lock); 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_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\n"); } 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\n"); } 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 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_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 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, }; 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, RTW_DBG_PCI, "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 {}, }; MODULE_DEVICE_TABLE(pci, rtw_pci_id_table); static struct pci_driver rtw_pci_driver = { .name = "rtw_pci", .id_table = rtw_pci_id_table, .probe = rtw_pci_probe, .remove = rtw_pci_remove, }; module_pci_driver(rtw_pci_driver); MODULE_AUTHOR("Realtek Corporation"); MODULE_DESCRIPTION("Realtek 802.11ac wireless PCI driver"); MODULE_LICENSE("Dual BSD/GPL");
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