| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Felix Fietkau | 3769 | 71.18% | 2 | 20.00% |
| Lorenzo Bianconi | 1474 | 27.84% | 3 | 30.00% |
| Yang Yingliang | 43 | 0.81% | 3 | 30.00% |
| Dan Carpenter | 8 | 0.15% | 1 | 10.00% |
| Tom Rix | 1 | 0.02% | 1 | 10.00% |
| Total | 5295 | 10 |
// SPDX-License-Identifier: GPL-2.0-only /* Copyright (C) 2021 Felix Fietkau <nbd@nbd.name> */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/bitfield.h> #include <linux/dma-mapping.h> #include <linux/skbuff.h> #include <linux/of_platform.h> #include <linux/of_address.h> #include <linux/mfd/syscon.h> #include <linux/debugfs.h> #include <linux/soc/mediatek/mtk_wed.h> #include "mtk_eth_soc.h" #include "mtk_wed_regs.h" #include "mtk_wed.h" #include "mtk_ppe.h" #define MTK_PCIE_BASE(n) (0x1a143000 + (n) * 0x2000) #define MTK_WED_PKT_SIZE 1900 #define MTK_WED_BUF_SIZE 2048 #define MTK_WED_BUF_PER_PAGE (PAGE_SIZE / 2048) #define MTK_WED_TX_RING_SIZE 2048 #define MTK_WED_WDMA_RING_SIZE 1024 #define MTK_WED_MAX_GROUP_SIZE 0x100 #define MTK_WED_VLD_GROUP_SIZE 0x40 #define MTK_WED_PER_GROUP_PKT 128 #define MTK_WED_FBUF_SIZE 128 static struct mtk_wed_hw *hw_list[2]; static DEFINE_MUTEX(hw_lock); static void wed_m32(struct mtk_wed_device *dev, u32 reg, u32 mask, u32 val) { regmap_update_bits(dev->hw->regs, reg, mask | val, val); } static void wed_set(struct mtk_wed_device *dev, u32 reg, u32 mask) { return wed_m32(dev, reg, 0, mask); } static void wed_clr(struct mtk_wed_device *dev, u32 reg, u32 mask) { return wed_m32(dev, reg, mask, 0); } static void wdma_m32(struct mtk_wed_device *dev, u32 reg, u32 mask, u32 val) { wdma_w32(dev, reg, (wdma_r32(dev, reg) & ~mask) | val); } static void wdma_set(struct mtk_wed_device *dev, u32 reg, u32 mask) { wdma_m32(dev, reg, 0, mask); } static u32 mtk_wed_read_reset(struct mtk_wed_device *dev) { return wed_r32(dev, MTK_WED_RESET); } static void mtk_wed_reset(struct mtk_wed_device *dev, u32 mask) { u32 status; wed_w32(dev, MTK_WED_RESET, mask); if (readx_poll_timeout(mtk_wed_read_reset, dev, status, !(status & mask), 0, 1000)) WARN_ON_ONCE(1); } static struct mtk_wed_hw * mtk_wed_assign(struct mtk_wed_device *dev) { struct mtk_wed_hw *hw; int i; if (dev->wlan.bus_type == MTK_WED_BUS_PCIE) { hw = hw_list[pci_domain_nr(dev->wlan.pci_dev->bus)]; if (!hw) return NULL; if (!hw->wed_dev) goto out; if (hw->version == 1) return NULL; /* MT7986 WED devices do not have any pcie slot restrictions */ } /* MT7986 PCIE or AXI */ for (i = 0; i < ARRAY_SIZE(hw_list); i++) { hw = hw_list[i]; if (hw && !hw->wed_dev) goto out; } return NULL; out: hw->wed_dev = dev; return hw; } static int mtk_wed_buffer_alloc(struct mtk_wed_device *dev) { struct mtk_wdma_desc *desc; dma_addr_t desc_phys; void **page_list; int token = dev->wlan.token_start; int ring_size; int n_pages; int i, page_idx; ring_size = dev->wlan.nbuf & ~(MTK_WED_BUF_PER_PAGE - 1); n_pages = ring_size / MTK_WED_BUF_PER_PAGE; page_list = kcalloc(n_pages, sizeof(*page_list), GFP_KERNEL); if (!page_list) return -ENOMEM; dev->buf_ring.size = ring_size; dev->buf_ring.pages = page_list; desc = dma_alloc_coherent(dev->hw->dev, ring_size * sizeof(*desc), &desc_phys, GFP_KERNEL); if (!desc) return -ENOMEM; dev->buf_ring.desc = desc; dev->buf_ring.desc_phys = desc_phys; for (i = 0, page_idx = 0; i < ring_size; i += MTK_WED_BUF_PER_PAGE) { dma_addr_t page_phys, buf_phys; struct page *page; void *buf; int s; page = __dev_alloc_pages(GFP_KERNEL, 0); if (!page) return -ENOMEM; page_phys = dma_map_page(dev->hw->dev, page, 0, PAGE_SIZE, DMA_BIDIRECTIONAL); if (dma_mapping_error(dev->hw->dev, page_phys)) { __free_page(page); return -ENOMEM; } page_list[page_idx++] = page; dma_sync_single_for_cpu(dev->hw->dev, page_phys, PAGE_SIZE, DMA_BIDIRECTIONAL); buf = page_to_virt(page); buf_phys = page_phys; for (s = 0; s < MTK_WED_BUF_PER_PAGE; s++) { u32 txd_size; u32 ctrl; txd_size = dev->wlan.init_buf(buf, buf_phys, token++); desc->buf0 = cpu_to_le32(buf_phys); desc->buf1 = cpu_to_le32(buf_phys + txd_size); if (dev->hw->version == 1) ctrl = FIELD_PREP(MTK_WDMA_DESC_CTRL_LEN0, txd_size) | FIELD_PREP(MTK_WDMA_DESC_CTRL_LEN1, MTK_WED_BUF_SIZE - txd_size) | MTK_WDMA_DESC_CTRL_LAST_SEG1; else ctrl = FIELD_PREP(MTK_WDMA_DESC_CTRL_LEN0, txd_size) | FIELD_PREP(MTK_WDMA_DESC_CTRL_LEN1_V2, MTK_WED_BUF_SIZE - txd_size) | MTK_WDMA_DESC_CTRL_LAST_SEG0; desc->ctrl = cpu_to_le32(ctrl); desc->info = 0; desc++; buf += MTK_WED_BUF_SIZE; buf_phys += MTK_WED_BUF_SIZE; } dma_sync_single_for_device(dev->hw->dev, page_phys, PAGE_SIZE, DMA_BIDIRECTIONAL); } return 0; } static void mtk_wed_free_buffer(struct mtk_wed_device *dev) { struct mtk_wdma_desc *desc = dev->buf_ring.desc; void **page_list = dev->buf_ring.pages; int page_idx; int i; if (!page_list) return; if (!desc) goto free_pagelist; for (i = 0, page_idx = 0; i < dev->buf_ring.size; i += MTK_WED_BUF_PER_PAGE) { void *page = page_list[page_idx++]; dma_addr_t buf_addr; if (!page) break; buf_addr = le32_to_cpu(desc[i].buf0); dma_unmap_page(dev->hw->dev, buf_addr, PAGE_SIZE, DMA_BIDIRECTIONAL); __free_page(page); } dma_free_coherent(dev->hw->dev, dev->buf_ring.size * sizeof(*desc), desc, dev->buf_ring.desc_phys); free_pagelist: kfree(page_list); } static void mtk_wed_free_ring(struct mtk_wed_device *dev, struct mtk_wed_ring *ring) { if (!ring->desc) return; dma_free_coherent(dev->hw->dev, ring->size * ring->desc_size, ring->desc, ring->desc_phys); } static void mtk_wed_free_tx_rings(struct mtk_wed_device *dev) { int i; for (i = 0; i < ARRAY_SIZE(dev->tx_ring); i++) mtk_wed_free_ring(dev, &dev->tx_ring[i]); for (i = 0; i < ARRAY_SIZE(dev->tx_wdma); i++) mtk_wed_free_ring(dev, &dev->tx_wdma[i]); } static void mtk_wed_set_ext_int(struct mtk_wed_device *dev, bool en) { u32 mask = MTK_WED_EXT_INT_STATUS_ERROR_MASK; if (dev->hw->version == 1) mask |= MTK_WED_EXT_INT_STATUS_TX_DRV_R_RESP_ERR; else mask |= MTK_WED_EXT_INT_STATUS_RX_FBUF_LO_TH | MTK_WED_EXT_INT_STATUS_RX_FBUF_HI_TH | MTK_WED_EXT_INT_STATUS_RX_DRV_COHERENT | MTK_WED_EXT_INT_STATUS_TX_DMA_W_RESP_ERR; if (!dev->hw->num_flows) mask &= ~MTK_WED_EXT_INT_STATUS_TKID_WO_PYLD; wed_w32(dev, MTK_WED_EXT_INT_MASK, en ? mask : 0); wed_r32(dev, MTK_WED_EXT_INT_MASK); } static void mtk_wed_set_512_support(struct mtk_wed_device *dev, bool enable) { if (enable) { wed_w32(dev, MTK_WED_TXDP_CTRL, MTK_WED_TXDP_DW9_OVERWR); wed_w32(dev, MTK_WED_TXP_DW1, FIELD_PREP(MTK_WED_WPDMA_WRITE_TXP, 0x0103)); } else { wed_w32(dev, MTK_WED_TXP_DW1, FIELD_PREP(MTK_WED_WPDMA_WRITE_TXP, 0x0100)); wed_clr(dev, MTK_WED_TXDP_CTRL, MTK_WED_TXDP_DW9_OVERWR); } } static void mtk_wed_dma_disable(struct mtk_wed_device *dev) { wed_clr(dev, MTK_WED_WPDMA_GLO_CFG, MTK_WED_WPDMA_GLO_CFG_TX_DRV_EN | MTK_WED_WPDMA_GLO_CFG_RX_DRV_EN); wed_clr(dev, MTK_WED_WDMA_GLO_CFG, MTK_WED_WDMA_GLO_CFG_RX_DRV_EN); wed_clr(dev, MTK_WED_GLO_CFG, MTK_WED_GLO_CFG_TX_DMA_EN | MTK_WED_GLO_CFG_RX_DMA_EN); wdma_m32(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_TX_DMA_EN | MTK_WDMA_GLO_CFG_RX_INFO1_PRERES | MTK_WDMA_GLO_CFG_RX_INFO2_PRERES, 0); if (dev->hw->version == 1) { regmap_write(dev->hw->mirror, dev->hw->index * 4, 0); wdma_m32(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_RX_INFO3_PRERES, 0); } else { wed_clr(dev, MTK_WED_WPDMA_GLO_CFG, MTK_WED_WPDMA_GLO_CFG_RX_DRV_R0_PKT_PROC | MTK_WED_WPDMA_GLO_CFG_RX_DRV_R0_CRX_SYNC); mtk_wed_set_512_support(dev, false); } } static void mtk_wed_stop(struct mtk_wed_device *dev) { mtk_wed_dma_disable(dev); mtk_wed_set_ext_int(dev, false); wed_clr(dev, MTK_WED_CTRL, MTK_WED_CTRL_WDMA_INT_AGENT_EN | MTK_WED_CTRL_WPDMA_INT_AGENT_EN | MTK_WED_CTRL_WED_TX_BM_EN | MTK_WED_CTRL_WED_TX_FREE_AGENT_EN); wed_w32(dev, MTK_WED_WPDMA_INT_TRIGGER, 0); wed_w32(dev, MTK_WED_WDMA_INT_TRIGGER, 0); wdma_w32(dev, MTK_WDMA_INT_MASK, 0); wdma_w32(dev, MTK_WDMA_INT_GRP2, 0); wed_w32(dev, MTK_WED_WPDMA_INT_MASK, 0); } static void mtk_wed_detach(struct mtk_wed_device *dev) { struct mtk_wed_hw *hw = dev->hw; mutex_lock(&hw_lock); mtk_wed_stop(dev); wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX); wdma_w32(dev, MTK_WDMA_RESET_IDX, 0); mtk_wed_reset(dev, MTK_WED_RESET_WED); mtk_wed_free_buffer(dev); mtk_wed_free_tx_rings(dev); if (dev->wlan.bus_type == MTK_WED_BUS_PCIE) { struct device_node *wlan_node; wlan_node = dev->wlan.pci_dev->dev.of_node; if (of_dma_is_coherent(wlan_node) && hw->hifsys) regmap_update_bits(hw->hifsys, HIFSYS_DMA_AG_MAP, BIT(hw->index), BIT(hw->index)); } if (!hw_list[!hw->index]->wed_dev && hw->eth->dma_dev != hw->eth->dev) mtk_eth_set_dma_device(hw->eth, hw->eth->dev); memset(dev, 0, sizeof(*dev)); module_put(THIS_MODULE); hw->wed_dev = NULL; mutex_unlock(&hw_lock); } #define PCIE_BASE_ADDR0 0x11280000 static void mtk_wed_bus_init(struct mtk_wed_device *dev) { switch (dev->wlan.bus_type) { case MTK_WED_BUS_PCIE: { struct device_node *np = dev->hw->eth->dev->of_node; struct regmap *regs; regs = syscon_regmap_lookup_by_phandle(np, "mediatek,wed-pcie"); if (IS_ERR(regs)) break; regmap_update_bits(regs, 0, BIT(0), BIT(0)); wed_w32(dev, MTK_WED_PCIE_INT_CTRL, FIELD_PREP(MTK_WED_PCIE_INT_CTRL_POLL_EN, 2)); /* pcie interrupt control: pola/source selection */ wed_set(dev, MTK_WED_PCIE_INT_CTRL, MTK_WED_PCIE_INT_CTRL_MSK_EN_POLA | FIELD_PREP(MTK_WED_PCIE_INT_CTRL_SRC_SEL, 1)); wed_r32(dev, MTK_WED_PCIE_INT_CTRL); wed_w32(dev, MTK_WED_PCIE_CFG_INTM, PCIE_BASE_ADDR0 | 0x180); wed_w32(dev, MTK_WED_PCIE_CFG_BASE, PCIE_BASE_ADDR0 | 0x184); /* pcie interrupt status trigger register */ wed_w32(dev, MTK_WED_PCIE_INT_TRIGGER, BIT(24)); wed_r32(dev, MTK_WED_PCIE_INT_TRIGGER); /* pola setting */ wed_set(dev, MTK_WED_PCIE_INT_CTRL, MTK_WED_PCIE_INT_CTRL_MSK_EN_POLA); break; } case MTK_WED_BUS_AXI: wed_set(dev, MTK_WED_WPDMA_INT_CTRL, MTK_WED_WPDMA_INT_CTRL_SIG_SRC | FIELD_PREP(MTK_WED_WPDMA_INT_CTRL_SRC_SEL, 0)); break; default: break; } } static void mtk_wed_set_wpdma(struct mtk_wed_device *dev) { if (dev->hw->version == 1) { wed_w32(dev, MTK_WED_WPDMA_CFG_BASE, dev->wlan.wpdma_phys); } else { mtk_wed_bus_init(dev); wed_w32(dev, MTK_WED_WPDMA_CFG_BASE, dev->wlan.wpdma_int); wed_w32(dev, MTK_WED_WPDMA_CFG_INT_MASK, dev->wlan.wpdma_mask); wed_w32(dev, MTK_WED_WPDMA_CFG_TX, dev->wlan.wpdma_tx); wed_w32(dev, MTK_WED_WPDMA_CFG_TX_FREE, dev->wlan.wpdma_txfree); } } static void mtk_wed_hw_init_early(struct mtk_wed_device *dev) { u32 mask, set; mtk_wed_stop(dev); mtk_wed_reset(dev, MTK_WED_RESET_WED); mtk_wed_set_wpdma(dev); mask = MTK_WED_WDMA_GLO_CFG_BT_SIZE | MTK_WED_WDMA_GLO_CFG_DYNAMIC_DMAD_RECYCLE | MTK_WED_WDMA_GLO_CFG_RX_DIS_FSM_AUTO_IDLE; set = FIELD_PREP(MTK_WED_WDMA_GLO_CFG_BT_SIZE, 2) | MTK_WED_WDMA_GLO_CFG_DYNAMIC_SKIP_DMAD_PREP | MTK_WED_WDMA_GLO_CFG_IDLE_DMAD_SUPPLY; wed_m32(dev, MTK_WED_WDMA_GLO_CFG, mask, set); if (dev->hw->version == 1) { u32 offset = dev->hw->index ? 0x04000400 : 0; wdma_set(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_RX_INFO1_PRERES | MTK_WDMA_GLO_CFG_RX_INFO2_PRERES | MTK_WDMA_GLO_CFG_RX_INFO3_PRERES); wed_w32(dev, MTK_WED_WDMA_OFFSET0, 0x2a042a20 + offset); wed_w32(dev, MTK_WED_WDMA_OFFSET1, 0x29002800 + offset); wed_w32(dev, MTK_WED_PCIE_CFG_BASE, MTK_PCIE_BASE(dev->hw->index)); } else { wed_w32(dev, MTK_WED_WDMA_CFG_BASE, dev->hw->wdma_phy); wed_set(dev, MTK_WED_CTRL, MTK_WED_CTRL_ETH_DMAD_FMT); wed_w32(dev, MTK_WED_WDMA_OFFSET0, FIELD_PREP(MTK_WED_WDMA_OFST0_GLO_INTS, MTK_WDMA_INT_STATUS) | FIELD_PREP(MTK_WED_WDMA_OFST0_GLO_CFG, MTK_WDMA_GLO_CFG)); wed_w32(dev, MTK_WED_WDMA_OFFSET1, FIELD_PREP(MTK_WED_WDMA_OFST1_TX_CTRL, MTK_WDMA_RING_TX(0)) | FIELD_PREP(MTK_WED_WDMA_OFST1_RX_CTRL, MTK_WDMA_RING_RX(0))); } } static void mtk_wed_hw_init(struct mtk_wed_device *dev) { if (dev->init_done) return; dev->init_done = true; mtk_wed_set_ext_int(dev, false); wed_w32(dev, MTK_WED_TX_BM_CTRL, MTK_WED_TX_BM_CTRL_PAUSE | FIELD_PREP(MTK_WED_TX_BM_CTRL_VLD_GRP_NUM, dev->buf_ring.size / 128) | FIELD_PREP(MTK_WED_TX_BM_CTRL_RSV_GRP_NUM, MTK_WED_TX_RING_SIZE / 256)); wed_w32(dev, MTK_WED_TX_BM_BASE, dev->buf_ring.desc_phys); wed_w32(dev, MTK_WED_TX_BM_BUF_LEN, MTK_WED_PKT_SIZE); if (dev->hw->version == 1) { wed_w32(dev, MTK_WED_TX_BM_TKID, FIELD_PREP(MTK_WED_TX_BM_TKID_START, dev->wlan.token_start) | FIELD_PREP(MTK_WED_TX_BM_TKID_END, dev->wlan.token_start + dev->wlan.nbuf - 1)); wed_w32(dev, MTK_WED_TX_BM_DYN_THR, FIELD_PREP(MTK_WED_TX_BM_DYN_THR_LO, 1) | MTK_WED_TX_BM_DYN_THR_HI); } else { wed_w32(dev, MTK_WED_TX_BM_TKID_V2, FIELD_PREP(MTK_WED_TX_BM_TKID_START, dev->wlan.token_start) | FIELD_PREP(MTK_WED_TX_BM_TKID_END, dev->wlan.token_start + dev->wlan.nbuf - 1)); wed_w32(dev, MTK_WED_TX_BM_DYN_THR, FIELD_PREP(MTK_WED_TX_BM_DYN_THR_LO_V2, 0) | MTK_WED_TX_BM_DYN_THR_HI_V2); wed_w32(dev, MTK_WED_TX_TKID_CTRL, MTK_WED_TX_TKID_CTRL_PAUSE | FIELD_PREP(MTK_WED_TX_TKID_CTRL_VLD_GRP_NUM, dev->buf_ring.size / 128) | FIELD_PREP(MTK_WED_TX_TKID_CTRL_RSV_GRP_NUM, dev->buf_ring.size / 128)); wed_w32(dev, MTK_WED_TX_TKID_DYN_THR, FIELD_PREP(MTK_WED_TX_TKID_DYN_THR_LO, 0) | MTK_WED_TX_TKID_DYN_THR_HI); } mtk_wed_reset(dev, MTK_WED_RESET_TX_BM); if (dev->hw->version == 1) wed_set(dev, MTK_WED_CTRL, MTK_WED_CTRL_WED_TX_BM_EN | MTK_WED_CTRL_WED_TX_FREE_AGENT_EN); else wed_clr(dev, MTK_WED_TX_TKID_CTRL, MTK_WED_TX_TKID_CTRL_PAUSE); wed_clr(dev, MTK_WED_TX_BM_CTRL, MTK_WED_TX_BM_CTRL_PAUSE); } static void mtk_wed_ring_reset(struct mtk_wed_ring *ring, int size) { void *head = (void *)ring->desc; int i; for (i = 0; i < size; i++) { struct mtk_wdma_desc *desc; desc = (struct mtk_wdma_desc *)(head + i * ring->desc_size); desc->buf0 = 0; desc->ctrl = cpu_to_le32(MTK_WDMA_DESC_CTRL_DMA_DONE); desc->buf1 = 0; desc->info = 0; } } static u32 mtk_wed_check_busy(struct mtk_wed_device *dev) { if (wed_r32(dev, MTK_WED_GLO_CFG) & MTK_WED_GLO_CFG_TX_DMA_BUSY) return true; if (wed_r32(dev, MTK_WED_WPDMA_GLO_CFG) & MTK_WED_WPDMA_GLO_CFG_TX_DRV_BUSY) return true; if (wed_r32(dev, MTK_WED_CTRL) & MTK_WED_CTRL_WDMA_INT_AGENT_BUSY) return true; if (wed_r32(dev, MTK_WED_WDMA_GLO_CFG) & MTK_WED_WDMA_GLO_CFG_RX_DRV_BUSY) return true; if (wdma_r32(dev, MTK_WDMA_GLO_CFG) & MTK_WED_WDMA_GLO_CFG_RX_DRV_BUSY) return true; if (wed_r32(dev, MTK_WED_CTRL) & (MTK_WED_CTRL_WED_TX_BM_BUSY | MTK_WED_CTRL_WED_TX_FREE_AGENT_BUSY)) return true; return false; } static int mtk_wed_poll_busy(struct mtk_wed_device *dev) { int sleep = 15000; int timeout = 100 * sleep; u32 val; return read_poll_timeout(mtk_wed_check_busy, val, !val, sleep, timeout, false, dev); } static void mtk_wed_reset_dma(struct mtk_wed_device *dev) { bool busy = false; u32 val; int i; for (i = 0; i < ARRAY_SIZE(dev->tx_ring); i++) { if (!dev->tx_ring[i].desc) continue; mtk_wed_ring_reset(&dev->tx_ring[i], MTK_WED_TX_RING_SIZE); } if (mtk_wed_poll_busy(dev)) busy = mtk_wed_check_busy(dev); if (busy) { mtk_wed_reset(dev, MTK_WED_RESET_WED_TX_DMA); } else { wed_w32(dev, MTK_WED_RESET_IDX, MTK_WED_RESET_IDX_TX | MTK_WED_RESET_IDX_RX); wed_w32(dev, MTK_WED_RESET_IDX, 0); } wdma_w32(dev, MTK_WDMA_RESET_IDX, MTK_WDMA_RESET_IDX_RX); wdma_w32(dev, MTK_WDMA_RESET_IDX, 0); if (busy) { mtk_wed_reset(dev, MTK_WED_RESET_WDMA_INT_AGENT); mtk_wed_reset(dev, MTK_WED_RESET_WDMA_RX_DRV); } else { wed_w32(dev, MTK_WED_WDMA_RESET_IDX, MTK_WED_WDMA_RESET_IDX_RX | MTK_WED_WDMA_RESET_IDX_DRV); wed_w32(dev, MTK_WED_WDMA_RESET_IDX, 0); wed_set(dev, MTK_WED_WDMA_GLO_CFG, MTK_WED_WDMA_GLO_CFG_RST_INIT_COMPLETE); wed_clr(dev, MTK_WED_WDMA_GLO_CFG, MTK_WED_WDMA_GLO_CFG_RST_INIT_COMPLETE); } for (i = 0; i < 100; i++) { val = wed_r32(dev, MTK_WED_TX_BM_INTF); if (FIELD_GET(MTK_WED_TX_BM_INTF_TKFIFO_FDEP, val) == 0x40) break; } mtk_wed_reset(dev, MTK_WED_RESET_TX_FREE_AGENT); mtk_wed_reset(dev, MTK_WED_RESET_TX_BM); if (busy) { mtk_wed_reset(dev, MTK_WED_RESET_WPDMA_INT_AGENT); mtk_wed_reset(dev, MTK_WED_RESET_WPDMA_TX_DRV); mtk_wed_reset(dev, MTK_WED_RESET_WPDMA_RX_DRV); } else { wed_w32(dev, MTK_WED_WPDMA_RESET_IDX, MTK_WED_WPDMA_RESET_IDX_TX | MTK_WED_WPDMA_RESET_IDX_RX); wed_w32(dev, MTK_WED_WPDMA_RESET_IDX, 0); } } static int mtk_wed_ring_alloc(struct mtk_wed_device *dev, struct mtk_wed_ring *ring, int size, u32 desc_size) { ring->desc = dma_alloc_coherent(dev->hw->dev, size * desc_size, &ring->desc_phys, GFP_KERNEL); if (!ring->desc) return -ENOMEM; ring->desc_size = desc_size; ring->size = size; mtk_wed_ring_reset(ring, size); return 0; } static int mtk_wed_wdma_ring_setup(struct mtk_wed_device *dev, int idx, int size) { u32 desc_size = sizeof(struct mtk_wdma_desc) * dev->hw->version; struct mtk_wed_ring *wdma = &dev->tx_wdma[idx]; if (mtk_wed_ring_alloc(dev, wdma, MTK_WED_WDMA_RING_SIZE, desc_size)) return -ENOMEM; wdma_w32(dev, MTK_WDMA_RING_RX(idx) + MTK_WED_RING_OFS_BASE, wdma->desc_phys); wdma_w32(dev, MTK_WDMA_RING_RX(idx) + MTK_WED_RING_OFS_COUNT, size); wdma_w32(dev, MTK_WDMA_RING_RX(idx) + MTK_WED_RING_OFS_CPU_IDX, 0); wed_w32(dev, MTK_WED_WDMA_RING_RX(idx) + MTK_WED_RING_OFS_BASE, wdma->desc_phys); wed_w32(dev, MTK_WED_WDMA_RING_RX(idx) + MTK_WED_RING_OFS_COUNT, size); return 0; } static void mtk_wed_configure_irq(struct mtk_wed_device *dev, u32 irq_mask) { u32 wdma_mask = FIELD_PREP(MTK_WDMA_INT_MASK_RX_DONE, GENMASK(1, 0)); /* wed control cr set */ wed_set(dev, MTK_WED_CTRL, MTK_WED_CTRL_WDMA_INT_AGENT_EN | MTK_WED_CTRL_WPDMA_INT_AGENT_EN | MTK_WED_CTRL_WED_TX_BM_EN | MTK_WED_CTRL_WED_TX_FREE_AGENT_EN); if (dev->hw->version == 1) { wed_w32(dev, MTK_WED_PCIE_INT_TRIGGER, MTK_WED_PCIE_INT_TRIGGER_STATUS); wed_w32(dev, MTK_WED_WPDMA_INT_TRIGGER, MTK_WED_WPDMA_INT_TRIGGER_RX_DONE | MTK_WED_WPDMA_INT_TRIGGER_TX_DONE); wed_clr(dev, MTK_WED_WDMA_INT_CTRL, wdma_mask); } else { /* initail tx interrupt trigger */ wed_w32(dev, MTK_WED_WPDMA_INT_CTRL_TX, MTK_WED_WPDMA_INT_CTRL_TX0_DONE_EN | MTK_WED_WPDMA_INT_CTRL_TX0_DONE_CLR | MTK_WED_WPDMA_INT_CTRL_TX1_DONE_EN | MTK_WED_WPDMA_INT_CTRL_TX1_DONE_CLR | FIELD_PREP(MTK_WED_WPDMA_INT_CTRL_TX0_DONE_TRIG, dev->wlan.tx_tbit[0]) | FIELD_PREP(MTK_WED_WPDMA_INT_CTRL_TX1_DONE_TRIG, dev->wlan.tx_tbit[1])); /* initail txfree interrupt trigger */ wed_w32(dev, MTK_WED_WPDMA_INT_CTRL_TX_FREE, MTK_WED_WPDMA_INT_CTRL_TX_FREE_DONE_EN | MTK_WED_WPDMA_INT_CTRL_TX_FREE_DONE_CLR | FIELD_PREP(MTK_WED_WPDMA_INT_CTRL_TX_FREE_DONE_TRIG, dev->wlan.txfree_tbit)); wed_w32(dev, MTK_WED_WDMA_INT_CLR, wdma_mask); wed_set(dev, MTK_WED_WDMA_INT_CTRL, FIELD_PREP(MTK_WED_WDMA_INT_CTRL_POLL_SRC_SEL, dev->wdma_idx)); } wed_w32(dev, MTK_WED_WDMA_INT_TRIGGER, wdma_mask); wdma_w32(dev, MTK_WDMA_INT_MASK, wdma_mask); wdma_w32(dev, MTK_WDMA_INT_GRP2, wdma_mask); wed_w32(dev, MTK_WED_WPDMA_INT_MASK, irq_mask); wed_w32(dev, MTK_WED_INT_MASK, irq_mask); } static void mtk_wed_dma_enable(struct mtk_wed_device *dev) { wed_set(dev, MTK_WED_WPDMA_INT_CTRL, MTK_WED_WPDMA_INT_CTRL_SUBRT_ADV); wed_set(dev, MTK_WED_GLO_CFG, MTK_WED_GLO_CFG_TX_DMA_EN | MTK_WED_GLO_CFG_RX_DMA_EN); wed_set(dev, MTK_WED_WPDMA_GLO_CFG, MTK_WED_WPDMA_GLO_CFG_TX_DRV_EN | MTK_WED_WPDMA_GLO_CFG_RX_DRV_EN); wed_set(dev, MTK_WED_WDMA_GLO_CFG, MTK_WED_WDMA_GLO_CFG_RX_DRV_EN); wdma_set(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_TX_DMA_EN | MTK_WDMA_GLO_CFG_RX_INFO1_PRERES | MTK_WDMA_GLO_CFG_RX_INFO2_PRERES); if (dev->hw->version == 1) { wdma_set(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_RX_INFO3_PRERES); } else { wed_set(dev, MTK_WED_WPDMA_CTRL, MTK_WED_WPDMA_CTRL_SDL1_FIXED); wed_set(dev, MTK_WED_WPDMA_GLO_CFG, MTK_WED_WPDMA_GLO_CFG_RX_DRV_R0_PKT_PROC | MTK_WED_WPDMA_GLO_CFG_RX_DRV_R0_CRX_SYNC); wed_clr(dev, MTK_WED_WPDMA_GLO_CFG, MTK_WED_WPDMA_GLO_CFG_TX_TKID_KEEP | MTK_WED_WPDMA_GLO_CFG_TX_DMAD_DW3_PREV); } } static void mtk_wed_start(struct mtk_wed_device *dev, u32 irq_mask) { int i; for (i = 0; i < ARRAY_SIZE(dev->tx_wdma); i++) if (!dev->tx_wdma[i].desc) mtk_wed_wdma_ring_setup(dev, i, 16); mtk_wed_hw_init(dev); mtk_wed_configure_irq(dev, irq_mask); mtk_wed_set_ext_int(dev, true); if (dev->hw->version == 1) { u32 val = dev->wlan.wpdma_phys | MTK_PCIE_MIRROR_MAP_EN | FIELD_PREP(MTK_PCIE_MIRROR_MAP_WED_ID, dev->hw->index); val |= BIT(0) | (BIT(1) * !!dev->hw->index); regmap_write(dev->hw->mirror, dev->hw->index * 4, val); } else { mtk_wed_set_512_support(dev, true); } mtk_wed_dma_enable(dev); dev->running = true; } static int mtk_wed_attach(struct mtk_wed_device *dev) __releases(RCU) { struct mtk_wed_hw *hw; struct device *device; int ret = 0; RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "mtk_wed_attach without holding the RCU read lock"); if ((dev->wlan.bus_type == MTK_WED_BUS_PCIE && pci_domain_nr(dev->wlan.pci_dev->bus) > 1) || !try_module_get(THIS_MODULE)) ret = -ENODEV; rcu_read_unlock(); if (ret) return ret; mutex_lock(&hw_lock); hw = mtk_wed_assign(dev); if (!hw) { module_put(THIS_MODULE); ret = -ENODEV; goto out; } device = dev->wlan.bus_type == MTK_WED_BUS_PCIE ? &dev->wlan.pci_dev->dev : &dev->wlan.platform_dev->dev; dev_info(device, "attaching wed device %d version %d\n", hw->index, hw->version); dev->hw = hw; dev->dev = hw->dev; dev->irq = hw->irq; dev->wdma_idx = hw->index; if (hw->eth->dma_dev == hw->eth->dev && of_dma_is_coherent(hw->eth->dev->of_node)) mtk_eth_set_dma_device(hw->eth, hw->dev); ret = mtk_wed_buffer_alloc(dev); if (ret) { mtk_wed_detach(dev); goto out; } mtk_wed_hw_init_early(dev); if (hw->hifsys) regmap_update_bits(hw->hifsys, HIFSYS_DMA_AG_MAP, BIT(hw->index), 0); out: mutex_unlock(&hw_lock); return ret; } static int mtk_wed_tx_ring_setup(struct mtk_wed_device *dev, int idx, void __iomem *regs) { struct mtk_wed_ring *ring = &dev->tx_ring[idx]; /* * Tx ring redirection: * Instead of configuring the WLAN PDMA TX ring directly, the WLAN * driver allocated DMA ring gets configured into WED MTK_WED_RING_TX(n) * registers. * * WED driver posts its own DMA ring as WLAN PDMA TX and configures it * into MTK_WED_WPDMA_RING_TX(n) registers. * It gets filled with packets picked up from WED TX ring and from * WDMA RX. */ BUG_ON(idx >= ARRAY_SIZE(dev->tx_ring)); if (mtk_wed_ring_alloc(dev, ring, MTK_WED_TX_RING_SIZE, sizeof(*ring->desc))) return -ENOMEM; if (mtk_wed_wdma_ring_setup(dev, idx, MTK_WED_WDMA_RING_SIZE)) return -ENOMEM; ring->reg_base = MTK_WED_RING_TX(idx); ring->wpdma = regs; /* WED -> WPDMA */ wpdma_tx_w32(dev, idx, MTK_WED_RING_OFS_BASE, ring->desc_phys); wpdma_tx_w32(dev, idx, MTK_WED_RING_OFS_COUNT, MTK_WED_TX_RING_SIZE); wpdma_tx_w32(dev, idx, MTK_WED_RING_OFS_CPU_IDX, 0); wed_w32(dev, MTK_WED_WPDMA_RING_TX(idx) + MTK_WED_RING_OFS_BASE, ring->desc_phys); wed_w32(dev, MTK_WED_WPDMA_RING_TX(idx) + MTK_WED_RING_OFS_COUNT, MTK_WED_TX_RING_SIZE); wed_w32(dev, MTK_WED_WPDMA_RING_TX(idx) + MTK_WED_RING_OFS_CPU_IDX, 0); return 0; } static int mtk_wed_txfree_ring_setup(struct mtk_wed_device *dev, void __iomem *regs) { struct mtk_wed_ring *ring = &dev->txfree_ring; int i, index = dev->hw->version == 1; /* * For txfree event handling, the same DMA ring is shared between WED * and WLAN. The WLAN driver accesses the ring index registers through * WED */ ring->reg_base = MTK_WED_RING_RX(index); ring->wpdma = regs; for (i = 0; i < 12; i += 4) { u32 val = readl(regs + i); wed_w32(dev, MTK_WED_RING_RX(index) + i, val); wed_w32(dev, MTK_WED_WPDMA_RING_RX(index) + i, val); } return 0; } static u32 mtk_wed_irq_get(struct mtk_wed_device *dev, u32 mask) { u32 val, ext_mask = MTK_WED_EXT_INT_STATUS_ERROR_MASK; if (dev->hw->version == 1) ext_mask |= MTK_WED_EXT_INT_STATUS_TX_DRV_R_RESP_ERR; else ext_mask |= MTK_WED_EXT_INT_STATUS_RX_FBUF_LO_TH | MTK_WED_EXT_INT_STATUS_RX_FBUF_HI_TH | MTK_WED_EXT_INT_STATUS_RX_DRV_COHERENT | MTK_WED_EXT_INT_STATUS_TX_DMA_W_RESP_ERR; val = wed_r32(dev, MTK_WED_EXT_INT_STATUS); wed_w32(dev, MTK_WED_EXT_INT_STATUS, val); val &= ext_mask; if (!dev->hw->num_flows) val &= ~MTK_WED_EXT_INT_STATUS_TKID_WO_PYLD; if (val && net_ratelimit()) pr_err("mtk_wed%d: error status=%08x\n", dev->hw->index, val); val = wed_r32(dev, MTK_WED_INT_STATUS); val &= mask; wed_w32(dev, MTK_WED_INT_STATUS, val); /* ACK */ return val; } static void mtk_wed_irq_set_mask(struct mtk_wed_device *dev, u32 mask) { if (!dev->running) return; mtk_wed_set_ext_int(dev, !!mask); wed_w32(dev, MTK_WED_INT_MASK, mask); } int mtk_wed_flow_add(int index) { struct mtk_wed_hw *hw = hw_list[index]; int ret; if (!hw || !hw->wed_dev) return -ENODEV; if (hw->num_flows) { hw->num_flows++; return 0; } mutex_lock(&hw_lock); if (!hw->wed_dev) { ret = -ENODEV; goto out; } ret = hw->wed_dev->wlan.offload_enable(hw->wed_dev); if (!ret) hw->num_flows++; mtk_wed_set_ext_int(hw->wed_dev, true); out: mutex_unlock(&hw_lock); return ret; } void mtk_wed_flow_remove(int index) { struct mtk_wed_hw *hw = hw_list[index]; if (!hw) return; if (--hw->num_flows) return; mutex_lock(&hw_lock); if (!hw->wed_dev) goto out; hw->wed_dev->wlan.offload_disable(hw->wed_dev); mtk_wed_set_ext_int(hw->wed_dev, true); out: mutex_unlock(&hw_lock); } void mtk_wed_add_hw(struct device_node *np, struct mtk_eth *eth, void __iomem *wdma, phys_addr_t wdma_phy, int index) { static const struct mtk_wed_ops wed_ops = { .attach = mtk_wed_attach, .tx_ring_setup = mtk_wed_tx_ring_setup, .txfree_ring_setup = mtk_wed_txfree_ring_setup, .start = mtk_wed_start, .stop = mtk_wed_stop, .reset_dma = mtk_wed_reset_dma, .reg_read = wed_r32, .reg_write = wed_w32, .irq_get = mtk_wed_irq_get, .irq_set_mask = mtk_wed_irq_set_mask, .detach = mtk_wed_detach, }; struct device_node *eth_np = eth->dev->of_node; struct platform_device *pdev; struct mtk_wed_hw *hw; struct regmap *regs; int irq; if (!np) return; pdev = of_find_device_by_node(np); if (!pdev) goto err_of_node_put; get_device(&pdev->dev); irq = platform_get_irq(pdev, 0); if (irq < 0) goto err_put_device; regs = syscon_regmap_lookup_by_phandle(np, NULL); if (IS_ERR(regs)) goto err_put_device; rcu_assign_pointer(mtk_soc_wed_ops, &wed_ops); mutex_lock(&hw_lock); if (WARN_ON(hw_list[index])) goto unlock; hw = kzalloc(sizeof(*hw), GFP_KERNEL); if (!hw) goto unlock; hw->node = np; hw->regs = regs; hw->eth = eth; hw->dev = &pdev->dev; hw->wdma_phy = wdma_phy; hw->wdma = wdma; hw->index = index; hw->irq = irq; hw->version = MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2) ? 2 : 1; if (hw->version == 1) { hw->mirror = syscon_regmap_lookup_by_phandle(eth_np, "mediatek,pcie-mirror"); hw->hifsys = syscon_regmap_lookup_by_phandle(eth_np, "mediatek,hifsys"); if (IS_ERR(hw->mirror) || IS_ERR(hw->hifsys)) { kfree(hw); goto unlock; } if (!index) { regmap_write(hw->mirror, 0, 0); regmap_write(hw->mirror, 4, 0); } } mtk_wed_hw_add_debugfs(hw); hw_list[index] = hw; mutex_unlock(&hw_lock); return; unlock: mutex_unlock(&hw_lock); err_put_device: put_device(&pdev->dev); err_of_node_put: of_node_put(np); } void mtk_wed_exit(void) { int i; rcu_assign_pointer(mtk_soc_wed_ops, NULL); synchronize_rcu(); for (i = 0; i < ARRAY_SIZE(hw_list); i++) { struct mtk_wed_hw *hw; hw = hw_list[i]; if (!hw) continue; hw_list[i] = NULL; debugfs_remove(hw->debugfs_dir); put_device(hw->dev); of_node_put(hw->node); kfree(hw); } }
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