From patchwork Mon Jan 4 18:00:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 356651 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35DA7C433E6 for ; Mon, 4 Jan 2021 18:01:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0DA2120784 for ; Mon, 4 Jan 2021 18:01:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727415AbhADSB3 (ORCPT ); Mon, 4 Jan 2021 13:01:29 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:57577 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726396AbhADSB3 (ORCPT ); Mon, 4 Jan 2021 13:01:29 -0500 X-UUID: 5b9a34115b654c9b8181587ec31f79de-20210105 X-UUID: 5b9a34115b654c9b8181587ec31f79de-20210105 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1458339980; Tue, 05 Jan 2021 02:00:23 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n2.mediatek.inc (172.21.101.101) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 5 Jan 2021 02:00:21 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 5 Jan 2021 02:00:21 +0800 From: To: , CC: , , , , , , , , , , Lorenzo Bianconi Subject: [PATCH -next v5 05/15] mt76: mt7921: add DMA support Date: Tue, 5 Jan 2021 02:00:09 +0800 Message-ID: <45a54e15dc414ef321f14092af252f92b4c7f8fb.1609781247.git.objelf@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-TM-SNTS-SMTP: 940D7BCFC0877F9D9B4321E05BB7728B00F957D1B1AD658C1436EA9B27E22C7B2000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Sean Wang Add DMA and register access support to MT7921e driver to set up the link for the data movement between the host and MT7921 MAC, or the host and MT7921 MCU. Co-developed-by: Lorenzo Bianconi Signed-off-by: Lorenzo Bianconi Co-developed-by: Soul Huang Signed-off-by: Soul Huang Signed-off-by: Sean Wang --- .../net/wireless/mediatek/mt76/mt7921/dma.c | 356 ++++++++++++++++++ .../net/wireless/mediatek/mt76/mt7921/mac.c | 3 + 2 files changed, 359 insertions(+) create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/dma.c diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/dma.c b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c new file mode 100644 index 000000000000..cd9665610284 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c @@ -0,0 +1,356 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2020 MediaTek Inc. */ + +#include "mt7921.h" +#include "../dma.h" +#include "mac.h" + +int mt7921_init_tx_queues(struct mt7921_phy *phy, int idx, int n_desc) +{ + int i, err; + + err = mt76_init_tx_queue(phy->mt76, 0, idx, n_desc, MT_TX_RING_BASE); + if (err < 0) + return err; + + for (i = 0; i <= MT_TXQ_PSD; i++) + phy->mt76->q_tx[i] = phy->mt76->q_tx[0]; + + return 0; +} + +void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, + struct sk_buff *skb) +{ + struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); + __le32 *rxd = (__le32 *)skb->data; + enum rx_pkt_type type; + u16 flag; + + type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0])); + flag = FIELD_GET(MT_RXD0_PKT_FLAG, le32_to_cpu(rxd[0])); + + if (type == PKT_TYPE_RX_EVENT && flag == 0x1) + type = PKT_TYPE_NORMAL_MCU; + + switch (type) { + case PKT_TYPE_TXRX_NOTIFY: + mt7921_mac_tx_free(dev, skb); + break; + case PKT_TYPE_RX_EVENT: + mt7921_mcu_rx_event(dev, skb); + break; + case PKT_TYPE_NORMAL_MCU: + case PKT_TYPE_NORMAL: + if (!mt7921_mac_fill_rx(dev, skb)) { + mt76_rx(&dev->mt76, q, skb); + return; + } + fallthrough; + default: + dev_kfree_skb(skb); + break; + } +} + +static void +mt7921_tx_cleanup(struct mt7921_dev *dev) +{ + mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], false); + mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WA], false); +} + +static int mt7921_poll_tx(struct napi_struct *napi, int budget) +{ + struct mt7921_dev *dev; + + dev = container_of(napi, struct mt7921_dev, mt76.tx_napi); + + mt7921_tx_cleanup(dev); + + if (napi_complete_done(napi, 0)) + mt7921_irq_enable(dev, MT_INT_TX_DONE_ALL); + + return 0; +} + +void mt7921_dma_prefetch(struct mt7921_dev *dev) +{ +#define PREFETCH(base, depth) ((base) << 16 | (depth)) + + mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL, PREFETCH(0x0, 0x4)); + mt76_wr(dev, MT_WFDMA0_RX_RING2_EXT_CTRL, PREFETCH(0x40, 0x4)); + mt76_wr(dev, MT_WFDMA0_RX_RING3_EXT_CTRL, PREFETCH(0x80, 0x4)); + mt76_wr(dev, MT_WFDMA0_RX_RING4_EXT_CTRL, PREFETCH(0xc0, 0x4)); + mt76_wr(dev, MT_WFDMA0_RX_RING5_EXT_CTRL, PREFETCH(0x100, 0x4)); + + mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, PREFETCH(0x140, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING1_EXT_CTRL, PREFETCH(0x180, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING2_EXT_CTRL, PREFETCH(0x1c0, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING3_EXT_CTRL, PREFETCH(0x200, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING4_EXT_CTRL, PREFETCH(0x240, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING5_EXT_CTRL, PREFETCH(0x280, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING6_EXT_CTRL, PREFETCH(0x2c0, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING16_EXT_CTRL, PREFETCH(0x340, 0x4)); + mt76_wr(dev, MT_WFDMA0_TX_RING17_EXT_CTRL, PREFETCH(0x380, 0x4)); +} + +static u32 __mt7921_reg_addr(struct mt7921_dev *dev, u32 addr) +{ + static const struct { + u32 phys; + u32 mapped; + u32 size; + } fixed_map[] = { + { 0x00400000, 0x80000, 0x10000}, /* WF_MCU_SYSRAM */ + { 0x00410000, 0x90000, 0x10000}, /* WF_MCU_SYSRAM (configure register) */ + { 0x40000000, 0x70000, 0x10000}, /* WF_UMAC_SYSRAM */ + { 0x54000000, 0x02000, 0x1000 }, /* WFDMA PCIE0 MCU DMA0 */ + { 0x55000000, 0x03000, 0x1000 }, /* WFDMA PCIE0 MCU DMA1 */ + { 0x58000000, 0x06000, 0x1000 }, /* WFDMA PCIE1 MCU DMA0 (MEM_DMA) */ + { 0x59000000, 0x07000, 0x1000 }, /* WFDMA PCIE1 MCU DMA1 */ + { 0x7c000000, 0xf0000, 0x10000 }, /* CONN_INFRA */ + { 0x7c020000, 0xd0000, 0x10000 }, /* CONN_INFRA, WFDMA */ + { 0x7c060000, 0xe0000, 0x10000}, /* CONN_INFRA, conn_host_csr_top */ + { 0x80020000, 0xb0000, 0x10000 }, /* WF_TOP_MISC_OFF */ + { 0x81020000, 0xc0000, 0x10000 }, /* WF_TOP_MISC_ON */ + { 0x820c0000, 0x08000, 0x4000 }, /* WF_UMAC_TOP (PLE) */ + { 0x820c8000, 0x0c000, 0x2000 }, /* WF_UMAC_TOP (PSE) */ + { 0x820cc000, 0x0e000, 0x2000 }, /* WF_UMAC_TOP (PP) */ + { 0x820ce000, 0x21c00, 0x0200 }, /* WF_LMAC_TOP (WF_SEC) */ + { 0x820cf000, 0x22000, 0x1000 }, /* WF_LMAC_TOP (WF_PF) */ + { 0x820d0000, 0x30000, 0x10000 }, /* WF_LMAC_TOP (WF_WTBLON) */ + { 0x820e0000, 0x20000, 0x0400 }, /* WF_LMAC_TOP BN0 (WF_CFG) */ + { 0x820e1000, 0x20400, 0x0200 }, /* WF_LMAC_TOP BN0 (WF_TRB) */ + { 0x820e2000, 0x20800, 0x0400 }, /* WF_LMAC_TOP BN0 (WF_AGG) */ + { 0x820e3000, 0x20c00, 0x0400 }, /* WF_LMAC_TOP BN0 (WF_ARB) */ + { 0x820e4000, 0x21000, 0x0400 }, /* WF_LMAC_TOP BN0 (WF_TMAC) */ + { 0x820e5000, 0x21400, 0x0800 }, /* WF_LMAC_TOP BN0 (WF_RMAC) */ + { 0x820e7000, 0x21e00, 0x0200 }, /* WF_LMAC_TOP BN0 (WF_DMA) */ + { 0x820e9000, 0x23400, 0x0200 }, /* WF_LMAC_TOP BN0 (WF_WTBLOFF) */ + { 0x820ea000, 0x24000, 0x0200 }, /* WF_LMAC_TOP BN0 (WF_ETBF) */ + { 0x820eb000, 0x24200, 0x0400 }, /* WF_LMAC_TOP BN0 (WF_LPON) */ + { 0x820ec000, 0x24600, 0x0200 }, /* WF_LMAC_TOP BN0 (WF_INT) */ + { 0x820ed000, 0x24800, 0x0800 }, /* WF_LMAC_TOP BN0 (WF_MIB) */ + { 0x820f0000, 0xa0000, 0x0400 }, /* WF_LMAC_TOP BN1 (WF_CFG) */ + { 0x820f1000, 0xa0600, 0x0200 }, /* WF_LMAC_TOP BN1 (WF_TRB) */ + { 0x820f2000, 0xa0800, 0x0400 }, /* WF_LMAC_TOP BN1 (WF_AGG) */ + { 0x820f3000, 0xa0c00, 0x0400 }, /* WF_LMAC_TOP BN1 (WF_ARB) */ + { 0x820f4000, 0xa1000, 0x0400 }, /* WF_LMAC_TOP BN1 (WF_TMAC) */ + { 0x820f5000, 0xa1400, 0x0800 }, /* WF_LMAC_TOP BN1 (WF_RMAC) */ + { 0x820f7000, 0xa1e00, 0x0200 }, /* WF_LMAC_TOP BN1 (WF_DMA) */ + { 0x820f9000, 0xa3400, 0x0200 }, /* WF_LMAC_TOP BN1 (WF_WTBLOFF) */ + { 0x820fa000, 0xa4000, 0x0200 }, /* WF_LMAC_TOP BN1 (WF_ETBF) */ + { 0x820fb000, 0xa4200, 0x0400 }, /* WF_LMAC_TOP BN1 (WF_LPON) */ + { 0x820fc000, 0xa4600, 0x0200 }, /* WF_LMAC_TOP BN1 (WF_INT) */ + { 0x820fd000, 0xa4800, 0x0800 }, /* WF_LMAC_TOP BN1 (WF_MIB) */ + }; + int i; + + if (addr < 0x100000) + return addr; + + for (i = 0; i < ARRAY_SIZE(fixed_map); i++) { + u32 ofs; + + if (addr < fixed_map[i].phys) + continue; + + ofs = addr - fixed_map[i].phys; + if (ofs > fixed_map[i].size) + continue; + + return fixed_map[i].mapped + ofs; + } + + if ((addr >= 0x18000000 && addr < 0x18c00000) || + (addr >= 0x70000000 && addr < 0x78000000) || + (addr >= 0x7c000000 && addr < 0x7c400000)) + return mt7921_reg_map_l1(dev, addr); + + dev_err(dev->mt76.dev, "Access currently unsupported address %08x\n", + addr); + + return 0; +} + +static u32 mt7921_rr(struct mt76_dev *mdev, u32 offset) +{ + struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); + u32 addr = __mt7921_reg_addr(dev, offset); + + return dev->bus_ops->rr(mdev, addr); +} + +static void mt7921_wr(struct mt76_dev *mdev, u32 offset, u32 val) +{ + struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); + u32 addr = __mt7921_reg_addr(dev, offset); + + dev->bus_ops->wr(mdev, addr, val); +} + +static u32 mt7921_rmw(struct mt76_dev *mdev, u32 offset, u32 mask, u32 val) +{ + struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); + u32 addr = __mt7921_reg_addr(dev, offset); + + return dev->bus_ops->rmw(mdev, addr, mask, val); +} + +static int mt7921_dmashdl_disabled(struct mt7921_dev *dev) +{ + mt76_clear(dev, MT_WFDMA0_GLO_CFG_EXT0, MT_WFDMA0_CSR_TX_DMASHDL_ENABLE); + mt76_set(dev, MT_DMASHDL_SW_CONTROL, MT_DMASHDL_DMASHDL_BYPASS); + + return 0; +} + +int mt7921_dma_init(struct mt7921_dev *dev) +{ + /* Increase buffer size to receive large VHT/HE MPDUs */ + struct mt76_bus_ops *bus_ops; + int rx_buf_size = MT_RX_BUF_SIZE * 2; + int ret; + + dev->bus_ops = dev->mt76.bus; + bus_ops = devm_kmemdup(dev->mt76.dev, dev->bus_ops, sizeof(*bus_ops), + GFP_KERNEL); + if (!bus_ops) + return -ENOMEM; + + bus_ops->rr = mt7921_rr; + bus_ops->wr = mt7921_wr; + bus_ops->rmw = mt7921_rmw; + dev->mt76.bus = bus_ops; + + mt76_dma_attach(&dev->mt76); + + /* reset */ + mt76_clear(dev, MT_WFDMA0_RST, + MT_WFDMA0_RST_DMASHDL_ALL_RST | + MT_WFDMA0_RST_LOGIC_RST); + + mt76_set(dev, MT_WFDMA0_RST, + MT_WFDMA0_RST_DMASHDL_ALL_RST | + MT_WFDMA0_RST_LOGIC_RST); + + ret = mt7921_dmashdl_disabled(dev); + if (ret) + return ret; + + /* disable WFDMA0 */ + mt76_clear(dev, MT_WFDMA0_GLO_CFG, + MT_WFDMA0_GLO_CFG_TX_DMA_EN | + MT_WFDMA0_GLO_CFG_RX_DMA_EN | + MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN | + MT_WFDMA0_GLO_CFG_OMIT_TX_INFO | + MT_WFDMA0_GLO_CFG_OMIT_RX_INFO | + MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2); + + mt76_poll(dev, MT_WFDMA0_GLO_CFG, + MT_WFDMA0_GLO_CFG_TX_DMA_BUSY | + MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000); + + /* init tx queue */ + ret = mt7921_init_tx_queues(&dev->phy, MT7921_TXQ_BAND0, + MT7921_TX_RING_SIZE); + if (ret) + return ret; + + mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, 0x4); + + /* command to WM */ + ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_WM, MT7921_TXQ_MCU_WM, + MT7921_TX_MCU_RING_SIZE, MT_TX_RING_BASE); + if (ret) + return ret; + + /* firmware download */ + ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_FWDL, MT7921_TXQ_FWDL, + MT7921_TX_FWDL_RING_SIZE, MT_TX_RING_BASE); + if (ret) + return ret; + + /* event from WM before firmware download */ + ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU], + MT7921_RXQ_MCU_WM, + MT7921_RX_MCU_RING_SIZE, + rx_buf_size, MT_RX_EVENT_RING_BASE); + if (ret) + return ret; + + /* Change mcu queue after firmware download */ + ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU_WA], + MT7921_RXQ_MCU_WM, + MT7921_RX_MCU_RING_SIZE, + rx_buf_size, MT_WFDMA0(0x540)); + if (ret) + return ret; + + /* rx data */ + ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN], + MT7921_RXQ_BAND0, MT7921_RX_RING_SIZE, + rx_buf_size, MT_RX_DATA_RING_BASE); + if (ret) + return ret; + + ret = mt76_init_queues(dev); + if (ret < 0) + return ret; + + netif_tx_napi_add(&dev->mt76.napi_dev, &dev->mt76.tx_napi, + mt7921_poll_tx, NAPI_POLL_WEIGHT); + napi_enable(&dev->mt76.tx_napi); + + /* configure perfetch settings */ + mt7921_dma_prefetch(dev); + + /* reset dma idx */ + mt76_wr(dev, MT_WFDMA0_RST_DTX_PTR, ~0); + + /* configure delay interrupt */ + mt76_wr(dev, MT_WFDMA0_PRI_DLY_INT_CFG0, 0); + + mt76_set(dev, MT_WFDMA0_GLO_CFG, + MT_WFDMA0_GLO_CFG_TX_WB_DDONE | + MT_WFDMA0_GLO_CFG_FIFO_LITTLE_ENDIAN | + MT_WFDMA0_GLO_CFG_CLK_GAT_DIS | + MT_WFDMA0_GLO_CFG_OMIT_TX_INFO | + MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN | + MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2); + + mt76_set(dev, MT_WFDMA0_GLO_CFG, + MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN); + + mt76_set(dev, 0x54000120, BIT(1)); + + /* enable interrupts for TX/RX rings */ + mt7921_irq_enable(dev, MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL | + MT_INT_MCU_CMD); + + return 0; +} + +void mt7921_dma_cleanup(struct mt7921_dev *dev) +{ + /* disable */ + mt76_clear(dev, MT_WFDMA0_GLO_CFG, + MT_WFDMA0_GLO_CFG_TX_DMA_EN | + MT_WFDMA0_GLO_CFG_RX_DMA_EN | + MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN | + MT_WFDMA0_GLO_CFG_OMIT_TX_INFO | + MT_WFDMA0_GLO_CFG_OMIT_RX_INFO | + MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2); + + /* reset */ + mt76_clear(dev, MT_WFDMA0_RST, + MT_WFDMA0_RST_DMASHDL_ALL_RST | + MT_WFDMA0_RST_LOGIC_RST); + + mt76_set(dev, MT_WFDMA0_RST, + MT_WFDMA0_RST_DMASHDL_ALL_RST | + MT_WFDMA0_RST_LOGIC_RST); + + mt76_dma_cleanup(&dev->mt76); +} diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index 853432d749ec..a5d3f5023ea4 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -1204,6 +1204,9 @@ mt7921_dma_reset(struct mt7921_phy *phy) mt76_queue_rx_reset(dev, i); } + /* re-init prefetch settings after reset */ + mt7921_dma_prefetch(dev); + mt76_set(dev, MT_WFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN); }