From patchwork Mon Dec 2 21:09:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niek Linnenbank X-Patchwork-Id: 1203325 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="L7ZszqUz"; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47Rdw161R3z9sPT for ; Tue, 3 Dec 2019 08:45:52 +1100 (AEDT) Received: from localhost ([::1]:44882 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ibtVs-0001kl-RW for incoming@patchwork.ozlabs.org; Mon, 02 Dec 2019 16:45:48 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:38280) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ibsxg-0002hs-Uy for qemu-devel@nongnu.org; Mon, 02 Dec 2019 16:10:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ibsxa-0000jx-6P for qemu-devel@nongnu.org; Mon, 02 Dec 2019 16:10:27 -0500 Received: from mail-wr1-x441.google.com ([2a00:1450:4864:20::441]:41607) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ibsxQ-0000b8-Pf; Mon, 02 Dec 2019 16:10:13 -0500 Received: by mail-wr1-x441.google.com with SMTP id b18so983379wrj.8; Mon, 02 Dec 2019 13:10:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=YSSdKKG1i6JVSlPytRsAwGL4WTE2dxtGdKjtspalJFE=; b=L7ZszqUzkHcluseCQLaWzNFJkI+6teYGz8kuF4ZzyMxGNDrQjkB1q3yD4lB0aSz1t2 4WgoAtsG1TqhLzlPY6scu4WFW5vve946/3lHfjOcecVoDicSS53/rs7DIXcFQbEW+smO HoGj+UsxG+J/smctlkiTJnmBHksNt9KsnixK4M34VWwG9hrCbW/UO8LoCofv+6iB2pGs fmUecTmhJf5HdwFMGVdat0iCixJRq6nlFChReialxQJmlf8prJJxVlJiqzqivWEKkBI8 VWTkyLJb+olapWmqYemz1GpeTCJdfVrAN8Z9LT8BzMO6dfw7GDhUgJLLZCH47Cv7KOfw 5XNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=YSSdKKG1i6JVSlPytRsAwGL4WTE2dxtGdKjtspalJFE=; b=FUYpHTd04WBfPD0Tzcr5h10VBlV+I6VcmDPSgmnGvV2rmw7DEhA8Q8do2R98IE5K4c vdzhLsbKmOSlsNuTocWq96VCD6oojdDlZ5fIDm2NJITE8NcJIQmBmKc3uGu85T22yXjr y5mCmkk7SVc2jL4DALsN/a051GEVPlQzLnF/excNYXE+XjZxCelPq1nN3RfY+Dtkcccs 8Zek+8Qmge7IvmAskSXT9Xkgrj0qWLJcLaPE5xmK5cmD1Dle+/QHrLaA+8Iiv2WjqPBQ +2Busx4fmHKuFx7fUVHHdGWcy2obLDmRlqODaG3LhMCarB5F/PgRUt19+C07TptPiAO2 Oitg== X-Gm-Message-State: APjAAAUIYTTcBSU9aMyCibpqxqdXHItBbH25brEIH2csRGgSHICmW9DL F0ml87b7K6lud4+9pj0zXIp15fQ4 X-Google-Smtp-Source: APXvYqwQkNFAKM4YhPm2hslVoloXVTCFDw47qe/cJqMSf2UxnufyFhxJppZZ3oE4wZQwnsa3gqhQ8g== X-Received: by 2002:adf:edd0:: with SMTP id v16mr1112264wro.310.1575321005843; Mon, 02 Dec 2019 13:10:05 -0800 (PST) Received: from pavilion.home ([2a02:a456:6be8:1:8edc:d4ff:fe8b:18b7]) by smtp.gmail.com with ESMTPSA id f1sm770859wrp.93.2019.12.02.13.10.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2019 13:10:05 -0800 (PST) From: Niek Linnenbank To: qemu-devel@nongnu.org Subject: [PATCH 10/10] arm: allwinner-h3: add EMAC ethernet device Date: Mon, 2 Dec 2019 22:09:47 +0100 Message-Id: <20191202210947.3603-11-nieklinnenbank@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191202210947.3603-1-nieklinnenbank@gmail.com> References: <20191202210947.3603-1-nieklinnenbank@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::441 X-Mailman-Approved-At: Mon, 02 Dec 2019 16:38:22 -0500 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: b.galvani@gmail.com, peter.maydell@linaro.org, Niek Linnenbank , qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The Allwinner H3 System on Chip includes an Ethernet MAC (EMAC) which provides 10M/100M/1000M Ethernet connectivity. This commit adds support for the Allwinner H3 EMAC, including emulation for the following functionality: * DMA transfers * MII interface * Transmit CRC calculation Signed-off-by: Niek Linnenbank --- hw/arm/Kconfig | 1 + hw/arm/allwinner-h3.c | 17 + hw/arm/orangepi.c | 7 + hw/net/Kconfig | 3 + hw/net/Makefile.objs | 1 + hw/net/allwinner-h3-emac.c | 786 +++++++++++++++++++++++++++++ hw/net/trace-events | 10 + include/hw/arm/allwinner-h3.h | 2 + include/hw/net/allwinner-h3-emac.h | 69 +++ 9 files changed, 896 insertions(+) create mode 100644 hw/net/allwinner-h3-emac.c create mode 100644 include/hw/net/allwinner-h3-emac.h diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig index ebf8d2325f..551cff3442 100644 --- a/hw/arm/Kconfig +++ b/hw/arm/Kconfig @@ -294,6 +294,7 @@ config ALLWINNER_A10 config ALLWINNER_H3 bool select ALLWINNER_A10_PIT + select ALLWINNER_H3_EMAC select SERIAL select ARM_TIMER select ARM_GIC diff --git a/hw/arm/allwinner-h3.c b/hw/arm/allwinner-h3.c index c2972caf88..274b8548c0 100644 --- a/hw/arm/allwinner-h3.c +++ b/hw/arm/allwinner-h3.c @@ -53,6 +53,9 @@ static void aw_h3_init(Object *obj) sysbus_init_child_obj(obj, "mmc0", &s->mmc0, sizeof(s->mmc0), TYPE_AW_H3_SDHOST); + + sysbus_init_child_obj(obj, "emac", &s->emac, sizeof(s->emac), + TYPE_AW_H3_EMAC); } static void aw_h3_realize(DeviceState *dev, Error **errp) @@ -237,6 +240,20 @@ static void aw_h3_realize(DeviceState *dev, Error **errp) return; } + /* EMAC */ + if (nd_table[0].used) { + qemu_check_nic_model(&nd_table[0], TYPE_AW_H3_EMAC); + qdev_set_nic_properties(DEVICE(&s->emac), &nd_table[0]); + } + object_property_set_bool(OBJECT(&s->emac), true, "realized", &err); + if (err != NULL) { + error_propagate(errp, err); + return; + } + sysbusdev = SYS_BUS_DEVICE(&s->emac); + sysbus_mmio_map(sysbusdev, 0, AW_H3_EMAC_BASE); + sysbus_connect_irq(sysbusdev, 0, s->irq[AW_H3_GIC_SPI_EMAC]); + /* Universal Serial Bus */ sysbus_create_simple(TYPE_AW_H3_EHCI, AW_H3_EHCI0_BASE, s->irq[AW_H3_GIC_SPI_EHCI0]); diff --git a/hw/arm/orangepi.c b/hw/arm/orangepi.c index dee3efaf08..8a61eb0e69 100644 --- a/hw/arm/orangepi.c +++ b/hw/arm/orangepi.c @@ -61,6 +61,13 @@ static void orangepi_init(MachineState *machine) exit(1); } + /* Setup EMAC properties */ + object_property_set_int(OBJECT(&s->h3->emac), 1, "phy-addr", &err); + if (err != NULL) { + error_reportf_err(err, "Couldn't set phy address: "); + exit(1); + } + /* Mark H3 object realized */ object_property_set_bool(OBJECT(s->h3), true, "realized", &err); if (err != NULL) { diff --git a/hw/net/Kconfig b/hw/net/Kconfig index 3856417d42..36d3923992 100644 --- a/hw/net/Kconfig +++ b/hw/net/Kconfig @@ -74,6 +74,9 @@ config MIPSNET config ALLWINNER_EMAC bool +config ALLWINNER_H3_EMAC + bool + config IMX_FEC bool diff --git a/hw/net/Makefile.objs b/hw/net/Makefile.objs index 7907d2c199..5548deb07a 100644 --- a/hw/net/Makefile.objs +++ b/hw/net/Makefile.objs @@ -23,6 +23,7 @@ common-obj-$(CONFIG_XGMAC) += xgmac.o common-obj-$(CONFIG_MIPSNET) += mipsnet.o common-obj-$(CONFIG_XILINX_AXI) += xilinx_axienet.o common-obj-$(CONFIG_ALLWINNER_EMAC) += allwinner_emac.o +common-obj-$(CONFIG_ALLWINNER_H3_EMAC) += allwinner-h3-emac.o common-obj-$(CONFIG_IMX_FEC) += imx_fec.o common-obj-$(CONFIG_CADENCE) += cadence_gem.o diff --git a/hw/net/allwinner-h3-emac.c b/hw/net/allwinner-h3-emac.c new file mode 100644 index 0000000000..37f6f44406 --- /dev/null +++ b/hw/net/allwinner-h3-emac.c @@ -0,0 +1,786 @@ +/* + * Allwinner H3 EMAC emulation + * + * Copyright (C) 2019 Niek Linnenbank + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include "qemu/osdep.h" +#include "hw/sysbus.h" +#include "migration/vmstate.h" +#include "net/net.h" +#include "hw/irq.h" +#include "hw/qdev-properties.h" +#include "qemu/log.h" +#include "trace.h" +#include "net/checksum.h" +#include "qemu/module.h" +#include "exec/cpu-common.h" +#include "hw/net/allwinner-h3-emac.h" + +/* EMAC register offsets */ +#define REG_BASIC_CTL_0 (0x0000) /* Basic Control 0 */ +#define REG_BASIC_CTL_1 (0x0004) /* Basic Control 1 */ +#define REG_INT_STA (0x0008) /* Interrupt Status */ +#define REG_INT_EN (0x000C) /* Interrupt Enable */ +#define REG_TX_CTL_0 (0x0010) /* Transmit Control 0 */ +#define REG_TX_CTL_1 (0x0014) /* Transmit Control 1 */ +#define REG_TX_FLOW_CTL (0x001C) /* Transmit Flow Control */ +#define REG_TX_DMA_DESC_LIST (0x0020) /* Transmit Descriptor List Address */ +#define REG_RX_CTL_0 (0x0024) /* Receive Control 0 */ +#define REG_RX_CTL_1 (0x0028) /* Receive Control 1 */ +#define REG_RX_DMA_DESC_LIST (0x0034) /* Receive Descriptor List Address */ +#define REG_FRM_FLT (0x0038) /* Receive Frame Filter */ +#define REG_RX_HASH_0 (0x0040) /* Receive Hash Table 0 */ +#define REG_RX_HASH_1 (0x0044) /* Receive Hash Table 1 */ +#define REG_MII_CMD (0x0048) /* Management Interface Command */ +#define REG_MII_DATA (0x004C) /* Management Interface Data */ +#define REG_ADDR_HIGH (0x0050) /* MAC Address High */ +#define REG_ADDR_LOW (0x0054) /* MAC Address Low */ +#define REG_TX_DMA_STA (0x00B0) /* Transmit DMA Status */ +#define REG_TX_CUR_DESC (0x00B4) /* Transmit Current Descriptor */ +#define REG_TX_CUR_BUF (0x00B8) /* Transmit Current Buffer */ +#define REG_RX_DMA_STA (0x00C0) /* Receive DMA Status */ +#define REG_RX_CUR_DESC (0x00C4) /* Receive Current Descriptor */ +#define REG_RX_CUR_BUF (0x00C8) /* Receive Current Buffer */ +#define REG_RGMII_STA (0x00D0) /* RGMII Status */ + +/* EMAC register flags */ +#define BASIC_CTL0_100Mbps (0b11 << 2) +#define BASIC_CTL0_FD (1 << 0) +#define BASIC_CTL1_SOFTRST (1 << 0) + +#define INT_STA_RGMII_LINK (1 << 16) +#define INT_STA_RX_EARLY (1 << 13) +#define INT_STA_RX_OVERFLOW (1 << 12) +#define INT_STA_RX_TIMEOUT (1 << 11) +#define INT_STA_RX_DMA_STOP (1 << 10) +#define INT_STA_RX_BUF_UA (1 << 9) +#define INT_STA_RX (1 << 8) +#define INT_STA_TX_EARLY (1 << 5) +#define INT_STA_TX_UNDERFLOW (1 << 4) +#define INT_STA_TX_TIMEOUT (1 << 3) +#define INT_STA_TX_BUF_UA (1 << 2) +#define INT_STA_TX_DMA_STOP (1 << 1) +#define INT_STA_TX (1 << 0) + +#define INT_EN_RX_EARLY (1 << 13) +#define INT_EN_RX_OVERFLOW (1 << 12) +#define INT_EN_RX_TIMEOUT (1 << 11) +#define INT_EN_RX_DMA_STOP (1 << 10) +#define INT_EN_RX_BUF_UA (1 << 9) +#define INT_EN_RX (1 << 8) +#define INT_EN_TX_EARLY (1 << 5) +#define INT_EN_TX_UNDERFLOW (1 << 4) +#define INT_EN_TX_TIMEOUT (1 << 3) +#define INT_EN_TX_BUF_UA (1 << 2) +#define INT_EN_TX_DMA_STOP (1 << 1) +#define INT_EN_TX (1 << 0) + +#define TX_CTL0_TX_EN (1 << 31) +#define TX_CTL1_TX_DMA_START (1 << 31) +#define TX_CTL1_TX_DMA_EN (1 << 30) +#define TX_CTL1_TX_FLUSH (1 << 0) + +#define RX_CTL0_RX_EN (1 << 31) +#define RX_CTL0_STRIP_FCS (1 << 28) +#define RX_CTL0_CRC_IPV4 (1 << 27) + +#define RX_CTL1_RX_DMA_START (1 << 31) +#define RX_CTL1_RX_DMA_EN (1 << 30) +#define RX_CTL1_RX_MD (1 << 1) + +#define RX_FRM_FLT_DIS_ADDR (1 << 31) + +#define MII_CMD_PHY_ADDR_SHIFT (12) +#define MII_CMD_PHY_ADDR_MASK (0xf000) +#define MII_CMD_PHY_REG_SHIFT (4) +#define MII_CMD_PHY_REG_MASK (0xf0) +#define MII_CMD_PHY_RW (1 << 1) +#define MII_CMD_PHY_BUSY (1 << 0) + +#define TX_DMA_STA_STOP (0b000) +#define TX_DMA_STA_RUN_FETCH (0b001) +#define TX_DMA_STA_WAIT_STA (0b010) + +#define RX_DMA_STA_STOP (0b000) +#define RX_DMA_STA_RUN_FETCH (0b001) +#define RX_DMA_STA_WAIT_FRM (0b011) + +#define RGMII_LINK_UP (1 << 3) +#define RGMII_FD (1 << 0) + +/* EMAC register reset values */ +#define REG_BASIC_CTL_1_RST (0x08000000) + +/* EMAC constants */ +#define AW_H3_EMAC_MIN_PKT_SZ (64) + +/* Transmit/receive frame descriptor */ +typedef struct FrameDescriptor { + uint32_t status; + uint32_t status2; + uint32_t addr; + uint32_t next; +} FrameDescriptor; + +/* Frame descriptor flags */ +#define DESC_STATUS_CTL (1 << 31) +#define DESC_STATUS2_BUF_SIZE_MASK (0x7ff) + +/* Transmit frame descriptor flags */ +#define TX_DESC_STATUS_LENGTH_ERR (1 << 14) +#define TX_DESC_STATUS2_FIRST_DESC (1 << 29) +#define TX_DESC_STATUS2_LAST_DESC (1 << 30) +#define TX_DESC_STATUS2_CHECKSUM_MASK (0x3 << 27) + +/* Receive frame descriptor flags */ +#define RX_DESC_STATUS_FIRST_DESC (1 << 9) +#define RX_DESC_STATUS_LAST_DESC (1 << 8) +#define RX_DESC_STATUS_FRM_LEN_MASK (0x3fff0000) +#define RX_DESC_STATUS_FRM_LEN_SHIFT (16) +#define RX_DESC_STATUS_NO_BUF (1 << 14) +#define RX_DESC_STATUS_HEADER_ERR (1 << 7) +#define RX_DESC_STATUS_LENGTH_ERR (1 << 4) +#define RX_DESC_STATUS_CRC_ERR (1 << 1) +#define RX_DESC_STATUS_PAYLOAD_ERR (1 << 0) +#define RX_DESC_STATUS2_RX_INT_CTL (1 << 31) + +/* MII register offsets */ +#define MII_REG_CR (0x0) +#define MII_REG_ST (0x1) +#define MII_REG_ID_HIGH (0x2) +#define MII_REG_ID_LOW (0x3) + +/* MII register flags */ +#define MII_REG_CR_RESET (1 << 15) +#define MII_REG_CR_POWERDOWN (1 << 11) +#define MII_REG_CR_10Mbit (0) +#define MII_REG_CR_100Mbit (1 << 13) +#define MII_REG_CR_1000Mbit (1 << 6) +#define MII_REG_CR_AUTO_NEG (1 << 12) +#define MII_REG_CR_AUTO_NEG_RESTART (1 << 9) +#define MII_REG_CR_FULLDUPLEX (1 << 8) + +#define MII_REG_ST_100BASE_T4 (1 << 15) +#define MII_REG_ST_100BASE_X_FD (1 << 14) +#define MII_REG_ST_100BASE_X_HD (1 << 13) +#define MII_REG_ST_10_FD (1 << 12) +#define MII_REG_ST_10_HD (1 << 11) +#define MII_REG_ST_100BASE_T2_FD (1 << 10) +#define MII_REG_ST_100BASE_T2_HD (1 << 9) +#define MII_REG_ST_AUTONEG_COMPLETE (1 << 5) +#define MII_REG_ST_AUTONEG_AVAIL (1 << 3) +#define MII_REG_ST_LINK_UP (1 << 2) + +/* MII constants */ +#define MII_PHY_ID_HIGH (0x0044) +#define MII_PHY_ID_LOW (0x1400) + +static void aw_h3_emac_mii_set_link(AwH3EmacState *s, bool link_active) +{ + if (link_active) { + s->mii_st |= MII_REG_ST_LINK_UP; + } else { + s->mii_st &= ~MII_REG_ST_LINK_UP; + } +} + +static void aw_h3_emac_mii_reset(AwH3EmacState *s, bool link_active) +{ + s->mii_cr = MII_REG_CR_100Mbit | MII_REG_CR_AUTO_NEG | + MII_REG_CR_FULLDUPLEX; + s->mii_st = MII_REG_ST_100BASE_T4 | MII_REG_ST_100BASE_X_FD | + MII_REG_ST_100BASE_X_HD | MII_REG_ST_10_FD | MII_REG_ST_10_HD | + MII_REG_ST_100BASE_T2_FD | MII_REG_ST_100BASE_T2_HD | + MII_REG_ST_AUTONEG_COMPLETE | MII_REG_ST_AUTONEG_AVAIL; + + aw_h3_emac_mii_set_link(s, link_active); +} + +static void aw_h3_emac_mii_cmd(AwH3EmacState *s) +{ + uint8_t addr, reg; + + addr = (s->mii_cmd & MII_CMD_PHY_ADDR_MASK) >> MII_CMD_PHY_ADDR_SHIFT; + reg = (s->mii_cmd & MII_CMD_PHY_REG_MASK) >> MII_CMD_PHY_REG_SHIFT; + + if (addr != s->mii_phy_addr) { + return; + } + + /* Read or write a PHY register? */ + if (s->mii_cmd & MII_CMD_PHY_RW) { + trace_aw_h3_emac_mii_write_reg(reg, s->mii_data); + + switch (reg) { + case MII_REG_CR: + if (s->mii_data & MII_REG_CR_RESET) { + aw_h3_emac_mii_reset(s, s->mii_st & MII_REG_ST_LINK_UP); + } else { + s->mii_cr = s->mii_data & ~(MII_REG_CR_RESET | + MII_REG_CR_AUTO_NEG_RESTART); + } + break; + default: + qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: write access to " + "unknown MII register 0x%x\n", reg); + break; + } + } else { + switch (reg) { + case MII_REG_CR: + s->mii_data = s->mii_cr; + break; + case MII_REG_ST: + s->mii_data = s->mii_st; + break; + case MII_REG_ID_HIGH: + s->mii_data = MII_PHY_ID_HIGH; + break; + case MII_REG_ID_LOW: + s->mii_data = MII_PHY_ID_LOW; + break; + default: + qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to " + "unknown MII register 0x%x\n", reg); + s->mii_data = 0; + break; + } + + trace_aw_h3_emac_mii_read_reg(reg, s->mii_data); + } +} + +static void aw_h3_emac_update_irq(AwH3EmacState *s) +{ + qemu_set_irq(s->irq, (s->int_sta & s->int_en) != 0); +} + +static uint32_t aw_h3_emac_next_desc(FrameDescriptor *desc, size_t min_size) +{ + uint32_t paddr = desc->next; + + cpu_physical_memory_read(paddr, desc, sizeof(*desc)); + + if ((desc->status & DESC_STATUS_CTL) && + (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_size) { + return paddr; + } else { + return 0; + } +} + +static uint32_t aw_h3_emac_get_desc(FrameDescriptor *desc, uint32_t start_addr, + size_t min_size) +{ + uint32_t desc_addr = start_addr; + + /* Note that the list is a cycle. Last entry points back to the head. */ + while (desc_addr != 0) { + cpu_physical_memory_read(desc_addr, desc, sizeof(*desc)); + + if ((desc->status & DESC_STATUS_CTL) && + (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_size) { + return desc_addr; + } else if (desc->next == start_addr) { + break; + } else { + desc_addr = desc->next; + } + } + + return 0; +} + +static uint32_t aw_h3_emac_get_rx_desc(AwH3EmacState *s, FrameDescriptor *desc, + size_t min_size) +{ + return aw_h3_emac_get_desc(desc, s->rx_desc_curr, min_size); +} + +static uint32_t aw_h3_emac_get_tx_desc(AwH3EmacState *s, FrameDescriptor *desc, + size_t min_size) +{ + return aw_h3_emac_get_desc(desc, s->tx_desc_head, min_size); +} + +static void aw_h3_emac_flush_desc(FrameDescriptor *desc, uint32_t phys_addr) +{ + cpu_physical_memory_write(phys_addr, desc, sizeof(*desc)); +} + +static int aw_h3_emac_can_receive(NetClientState *nc) +{ + AwH3EmacState *s = qemu_get_nic_opaque(nc); + FrameDescriptor desc; + + return (s->rx_ctl0 & RX_CTL0_RX_EN) && + (aw_h3_emac_get_rx_desc(s, &desc, 0) != 0); +} + +static ssize_t aw_h3_emac_receive(NetClientState *nc, const uint8_t *buf, + size_t size) +{ + AwH3EmacState *s = qemu_get_nic_opaque(nc); + FrameDescriptor desc; + size_t bytes_left = size; + size_t desc_bytes = 0; + size_t pad_fcs_size = 4; + size_t padding = 0; + + if (!(s->rx_ctl0 & RX_CTL0_RX_EN)) { + return -1; + } + + s->rx_desc_curr = aw_h3_emac_get_rx_desc(s, &desc, AW_H3_EMAC_MIN_PKT_SZ); + if (!s->rx_desc_curr) { + s->int_sta |= INT_STA_RX_BUF_UA; + } + + /* Keep filling RX descriptors until the whole frame is written */ + while (s->rx_desc_curr && bytes_left > 0) { + desc.status &= ~DESC_STATUS_CTL; + desc.status &= ~RX_DESC_STATUS_FRM_LEN_MASK; + + if (bytes_left == size) { + desc.status |= RX_DESC_STATUS_FIRST_DESC; + } + + if ((desc.status2 & DESC_STATUS2_BUF_SIZE_MASK) < + (bytes_left + pad_fcs_size)) { + desc_bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK; + desc.status |= desc_bytes << RX_DESC_STATUS_FRM_LEN_SHIFT; + } else { + padding = pad_fcs_size; + if (bytes_left < AW_H3_EMAC_MIN_PKT_SZ) { + padding += (AW_H3_EMAC_MIN_PKT_SZ - bytes_left); + } + + desc_bytes = (bytes_left); + desc.status |= RX_DESC_STATUS_LAST_DESC; + desc.status |= (bytes_left + padding) + << RX_DESC_STATUS_FRM_LEN_SHIFT; + } + + cpu_physical_memory_write(desc.addr, buf, desc_bytes); + aw_h3_emac_flush_desc(&desc, s->rx_desc_curr); + trace_aw_h3_emac_receive(s->rx_desc_curr, desc.addr, desc_bytes); + + /* Check if frame needs to raise the receive interrupt */ + if (!(desc.status2 & RX_DESC_STATUS2_RX_INT_CTL)) { + s->int_sta |= INT_STA_RX; + } + + /* Increment variables */ + buf += desc_bytes; + bytes_left -= desc_bytes; + + /* Move to the next descriptor */ + s->rx_desc_curr = aw_h3_emac_next_desc(&desc, 64); + if (!s->rx_desc_curr) { + /* Not enough buffer space available */ + s->int_sta |= INT_STA_RX_BUF_UA; + s->rx_desc_curr = s->rx_desc_head; + break; + } + } + + /* Report receive DMA is finished */ + s->rx_ctl1 &= ~RX_CTL1_RX_DMA_START; + aw_h3_emac_update_irq(s); + + return size; +} + +static void aw_h3_emac_transmit(AwH3EmacState *s) +{ + NetClientState *nc = qemu_get_queue(s->nic); + FrameDescriptor desc; + size_t bytes = 0; + size_t packet_bytes = 0; + size_t transmitted = 0; + static uint8_t packet_buf[2048]; + + s->tx_desc_curr = aw_h3_emac_get_tx_desc(s, &desc, 0); + + /* Read all transmit descriptors */ + while (s->tx_desc_curr != 0) { + + /* Read from physical memory into packet buffer */ + bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK; + if (bytes + packet_bytes > sizeof(packet_buf)) { + desc.status |= TX_DESC_STATUS_LENGTH_ERR; + break; + } + cpu_physical_memory_read(desc.addr, packet_buf + packet_bytes, bytes); + packet_bytes += bytes; + desc.status &= ~DESC_STATUS_CTL; + aw_h3_emac_flush_desc(&desc, s->tx_desc_curr); + + /* After the last descriptor, send the packet */ + if (desc.status2 & TX_DESC_STATUS2_LAST_DESC) { + if (desc.status2 & TX_DESC_STATUS2_CHECKSUM_MASK) { + net_checksum_calculate(packet_buf, packet_bytes); + } + + qemu_send_packet(nc, packet_buf, packet_bytes); + trace_aw_h3_emac_transmit(s->tx_desc_curr, desc.addr, bytes); + + packet_bytes = 0; + transmitted++; + } + s->tx_desc_curr = aw_h3_emac_next_desc(&desc, 0); + } + + /* Raise transmit completed interrupt */ + if (transmitted > 0) { + s->int_sta |= INT_STA_TX; + s->tx_ctl1 &= ~TX_CTL1_TX_DMA_START; + aw_h3_emac_update_irq(s); + } +} + +static void aw_h3_emac_reset(DeviceState *dev) +{ + AwH3EmacState *s = AW_H3_EMAC(dev); + NetClientState *nc = qemu_get_queue(s->nic); + + trace_aw_h3_emac_reset(); + + s->mii_cmd = 0; + s->mii_data = 0; + s->basic_ctl0 = 0; + s->basic_ctl1 = 0; + s->int_en = 0; + s->int_sta = 0; + s->frm_flt = 0; + s->rx_ctl0 = 0; + s->rx_ctl1 = RX_CTL1_RX_MD; + s->rx_desc_head = 0; + s->rx_desc_curr = 0; + s->tx_ctl0 = 0; + s->tx_ctl1 = 0; + s->tx_desc_head = 0; + s->tx_desc_curr = 0; + s->tx_flowctl = 0; + + aw_h3_emac_mii_reset(s, !nc->link_down); +} + +static uint64_t aw_h3_emac_read(void *opaque, hwaddr offset, unsigned size) +{ + AwH3EmacState *s = opaque; + uint64_t value = 0; + FrameDescriptor desc; + + switch (offset) { + case REG_BASIC_CTL_0: /* Basic Control 0 */ + value = s->basic_ctl0; + break; + case REG_BASIC_CTL_1: /* Basic Control 1 */ + value = s->basic_ctl1; + break; + case REG_INT_STA: /* Interrupt Status */ + value = s->int_sta; + break; + case REG_INT_EN: /* Interupt Enable */ + value = s->int_en; + break; + case REG_TX_CTL_0: /* Transmit Control 0 */ + value = s->tx_ctl0; + break; + case REG_TX_CTL_1: /* Transmit Control 1 */ + value = s->tx_ctl1; + break; + case REG_TX_FLOW_CTL: /* Transmit Flow Control */ + value = s->tx_flowctl; + break; + case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */ + value = s->tx_desc_head; + break; + case REG_RX_CTL_0: /* Receive Control 0 */ + value = s->rx_ctl0; + break; + case REG_RX_CTL_1: /* Receive Control 1 */ + value = s->rx_ctl1; + break; + case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */ + value = s->rx_desc_head; + break; + case REG_FRM_FLT: /* Receive Frame Filter */ + value = s->frm_flt; + break; + case REG_RX_HASH_0: /* Receive Hash Table 0 */ + case REG_RX_HASH_1: /* Receive Hash Table 1 */ + break; + case REG_MII_CMD: /* Management Interface Command */ + value = s->mii_cmd; + break; + case REG_MII_DATA: /* Management Interface Data */ + value = s->mii_data; + break; + case REG_ADDR_HIGH: /* MAC Address High */ + value = *(((uint32_t *) (s->conf.macaddr.a)) + 1); + break; + case REG_ADDR_LOW: /* MAC Address Low */ + value = *(uint32_t *) (s->conf.macaddr.a); + break; + case REG_TX_DMA_STA: /* Transmit DMA Status */ + break; + case REG_TX_CUR_DESC: /* Transmit Current Descriptor */ + value = s->tx_desc_curr; + break; + case REG_TX_CUR_BUF: /* Transmit Current Buffer */ + if (s->tx_desc_curr != 0) { + cpu_physical_memory_read(s->tx_desc_curr, &desc, sizeof(desc)); + value = desc.addr; + } else { + value = 0; + } + break; + case REG_RX_DMA_STA: /* Receive DMA Status */ + break; + case REG_RX_CUR_DESC: /* Receive Current Descriptor */ + value = s->rx_desc_curr; + break; + case REG_RX_CUR_BUF: /* Receive Current Buffer */ + if (s->rx_desc_curr != 0) { + cpu_physical_memory_read(s->rx_desc_curr, &desc, sizeof(desc)); + value = desc.addr; + } else { + value = 0; + } + break; + default: + qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to unknown " + "EMAC register 0x" TARGET_FMT_plx "\n", + offset); + } + + trace_aw_h3_emac_read(offset, value); + return value; +} + +static void aw_h3_emac_write(void *opaque, hwaddr offset, uint64_t value, + unsigned size) +{ + AwH3EmacState *s = opaque; + NetClientState *nc = qemu_get_queue(s->nic); + + trace_aw_h3_emac_write(offset, value); + + switch (offset) { + case REG_BASIC_CTL_0: /* Basic Control 0 */ + s->basic_ctl0 = value; + break; + case REG_BASIC_CTL_1: /* Basic Control 1 */ + if (value & BASIC_CTL1_SOFTRST) { + aw_h3_emac_reset(DEVICE(s)); + value &= ~BASIC_CTL1_SOFTRST; + } + s->basic_ctl1 = value; + if (aw_h3_emac_can_receive(nc)) { + qemu_flush_queued_packets(nc); + } + break; + case REG_INT_STA: /* Interrupt Status */ + s->int_sta &= ~value; + aw_h3_emac_update_irq(s); + break; + case REG_INT_EN: /* Interrupt Enable */ + s->int_en = value; + aw_h3_emac_update_irq(s); + break; + case REG_TX_CTL_0: /* Transmit Control 0 */ + s->tx_ctl0 = value; + break; + case REG_TX_CTL_1: /* Transmit Control 1 */ + s->tx_ctl1 = value; + if (value & TX_CTL1_TX_DMA_EN) { + aw_h3_emac_transmit(s); + } + break; + case REG_TX_FLOW_CTL: /* Transmit Flow Control */ + s->tx_flowctl = value; + break; + case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */ + s->tx_desc_head = value; + s->tx_desc_curr = value; + break; + case REG_RX_CTL_0: /* Receive Control 0 */ + s->rx_ctl0 = value; + break; + case REG_RX_CTL_1: /* Receive Control 1 */ + s->rx_ctl1 = value | RX_CTL1_RX_MD; + if ((value & RX_CTL1_RX_DMA_EN) && aw_h3_emac_can_receive(nc)) { + qemu_flush_queued_packets(nc); + } + break; + case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */ + s->rx_desc_head = value; + s->rx_desc_curr = value; + break; + case REG_FRM_FLT: /* Receive Frame Filter */ + s->frm_flt = value; + break; + case REG_RX_HASH_0: /* Receive Hash Table 0 */ + case REG_RX_HASH_1: /* Receive Hash Table 1 */ + break; + case REG_MII_CMD: /* Management Interface Command */ + s->mii_cmd = value & ~MII_CMD_PHY_BUSY; + aw_h3_emac_mii_cmd(s); + break; + case REG_MII_DATA: /* Management Interface Data */ + s->mii_data = value; + break; + case REG_ADDR_HIGH: /* MAC Address High */ + s->conf.macaddr.a[4] = (value & 0xff); + s->conf.macaddr.a[5] = (value & 0xff00) >> 8; + break; + case REG_ADDR_LOW: /* MAC Address Low */ + s->conf.macaddr.a[0] = (value & 0xff); + s->conf.macaddr.a[1] = (value & 0xff00) >> 8; + s->conf.macaddr.a[2] = (value & 0xff0000) >> 16; + s->conf.macaddr.a[3] = (value & 0xff000000) >> 24; + break; + case REG_TX_DMA_STA: /* Transmit DMA Status */ + case REG_TX_CUR_DESC: /* Transmit Current Descriptor */ + case REG_TX_CUR_BUF: /* Transmit Current Buffer */ + case REG_RX_DMA_STA: /* Receive DMA Status */ + case REG_RX_CUR_DESC: /* Receive Current Descriptor */ + case REG_RX_CUR_BUF: /* Receive Current Buffer */ + case REG_RGMII_STA: /* RGMII Status */ + break; + default: + qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: write access to unknown " + "EMAC register 0x" TARGET_FMT_plx "\n", + offset); + } +} + +static void aw_h3_emac_set_link(NetClientState *nc) +{ + AwH3EmacState *s = qemu_get_nic_opaque(nc); + + trace_aw_h3_emac_set_link(!nc->link_down); + aw_h3_emac_mii_set_link(s, !nc->link_down); +} + +static const MemoryRegionOps aw_h3_emac_mem_ops = { + .read = aw_h3_emac_read, + .write = aw_h3_emac_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 4, + }, +}; + +static NetClientInfo net_aw_h3_emac_info = { + .type = NET_CLIENT_DRIVER_NIC, + .size = sizeof(NICState), + .can_receive = aw_h3_emac_can_receive, + .receive = aw_h3_emac_receive, + .link_status_changed = aw_h3_emac_set_link, +}; + +static void aw_h3_emac_init(Object *obj) +{ + SysBusDevice *sbd = SYS_BUS_DEVICE(obj); + AwH3EmacState *s = AW_H3_EMAC(obj); + + memory_region_init_io(&s->iomem, OBJECT(s), &aw_h3_emac_mem_ops, s, + TYPE_AW_H3_EMAC, AW_H3_EMAC_REGS_MEM_SIZE); + sysbus_init_mmio(sbd, &s->iomem); + sysbus_init_irq(sbd, &s->irq); +} + +static void aw_h3_emac_realize(DeviceState *dev, Error **errp) +{ + AwH3EmacState *s = AW_H3_EMAC(dev); + + qemu_macaddr_default_if_unset(&s->conf.macaddr); + s->nic = qemu_new_nic(&net_aw_h3_emac_info, &s->conf, + object_get_typename(OBJECT(dev)), dev->id, s); + qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); +} + +static Property aw_h3_emac_properties[] = { + DEFINE_NIC_PROPERTIES(AwH3EmacState, conf), + DEFINE_PROP_UINT8("phy-addr", AwH3EmacState, mii_phy_addr, 0), + DEFINE_PROP_END_OF_LIST(), +}; + +static int aw_h3_emac_post_load(void *opaque, int version_id) +{ + AwH3EmacState *s = opaque; + + aw_h3_emac_set_link(qemu_get_queue(s->nic)); + + return 0; +} + +static const VMStateDescription vmstate_aw_emac = { + .name = TYPE_AW_H3_EMAC, + .version_id = 1, + .minimum_version_id = 1, + .post_load = aw_h3_emac_post_load, + .fields = (VMStateField[]) { + VMSTATE_UINT8(mii_phy_addr, AwH3EmacState), + VMSTATE_UINT32(mii_cmd, AwH3EmacState), + VMSTATE_UINT32(mii_data, AwH3EmacState), + VMSTATE_UINT32(basic_ctl0, AwH3EmacState), + VMSTATE_UINT32(basic_ctl1, AwH3EmacState), + VMSTATE_UINT32(int_en, AwH3EmacState), + VMSTATE_UINT32(int_sta, AwH3EmacState), + VMSTATE_UINT32(frm_flt, AwH3EmacState), + VMSTATE_UINT32(rx_ctl0, AwH3EmacState), + VMSTATE_UINT32(rx_ctl1, AwH3EmacState), + VMSTATE_UINT32(rx_desc_head, AwH3EmacState), + VMSTATE_UINT32(rx_desc_curr, AwH3EmacState), + VMSTATE_UINT32(tx_ctl0, AwH3EmacState), + VMSTATE_UINT32(tx_ctl1, AwH3EmacState), + VMSTATE_UINT32(tx_desc_head, AwH3EmacState), + VMSTATE_UINT32(tx_desc_curr, AwH3EmacState), + VMSTATE_UINT32(tx_flowctl, AwH3EmacState), + VMSTATE_END_OF_LIST() + } +}; + +static void aw_h3_emac_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = aw_h3_emac_realize; + dc->props = aw_h3_emac_properties; + dc->reset = aw_h3_emac_reset; + dc->vmsd = &vmstate_aw_emac; +} + +static const TypeInfo aw_h3_emac_info = { + .name = TYPE_AW_H3_EMAC, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(AwH3EmacState), + .instance_init = aw_h3_emac_init, + .class_init = aw_h3_emac_class_init, +}; + +static void aw_h3_emac_register_types(void) +{ + type_register_static(&aw_h3_emac_info); +} + +type_init(aw_h3_emac_register_types) diff --git a/hw/net/trace-events b/hw/net/trace-events index e70f12bee1..e9e2f26f68 100644 --- a/hw/net/trace-events +++ b/hw/net/trace-events @@ -1,5 +1,15 @@ # See docs/devel/tracing.txt for syntax documentation. +# allwinner-h3-emac.c +aw_h3_emac_mii_write_reg(uint32_t reg, uint32_t value) "MII write: reg=0x%x value=0x%x" +aw_h3_emac_mii_read_reg(uint32_t reg, uint32_t value) "MII read: reg=0x%x value=0x%x" +aw_h3_emac_receive(uint32_t desc, uint32_t paddr, uint32_t bytes) "RX packet: desc=0x%08x paddr=0x%08x bytes=%u" +aw_h3_emac_transmit(uint32_t desc, uint32_t paddr, uint32_t bytes) "TX packet: desc=0x%08x paddr=0x%08x bytes=%u" +aw_h3_emac_reset(void) "HW reset" +aw_h3_emac_set_link(bool active) "Set link: active=%u" +aw_h3_emac_read(uint64_t offset, uint64_t val) "MMIO read: offset=0x%" PRIx64 " value=0x%" PRIx64 +aw_h3_emac_write(uint64_t offset, uint64_t val) "MMIO write: offset=0x%" PRIx64 " value=0x%" PRIx64 + # etraxfs_eth.c mdio_phy_read(int regnum, uint16_t value) "read phy_reg:%d value:0x%04x" mdio_phy_write(int regnum, uint16_t value) "write phy_reg:%d value:0x%04x" diff --git a/include/hw/arm/allwinner-h3.h b/include/hw/arm/allwinner-h3.h index 7aff4ebbd2..b964a60f41 100644 --- a/include/hw/arm/allwinner-h3.h +++ b/include/hw/arm/allwinner-h3.h @@ -31,6 +31,7 @@ #include "hw/misc/allwinner-h3-syscon.h" #include "hw/misc/allwinner-h3-sid.h" #include "hw/sd/allwinner-h3-sdhost.h" +#include "hw/net/allwinner-h3-emac.h" #include "target/arm/cpu.h" #define AW_H3_SRAM_A1_BASE (0x00000000) @@ -119,6 +120,7 @@ typedef struct AwH3State { AwH3SysconState syscon; AwH3SidState sid; AwH3SDHostState mmc0; + AwH3EmacState emac; GICState gic; MemoryRegion sram_a1; MemoryRegion sram_a2; diff --git a/include/hw/net/allwinner-h3-emac.h b/include/hw/net/allwinner-h3-emac.h new file mode 100644 index 0000000000..a007d54472 --- /dev/null +++ b/include/hw/net/allwinner-h3-emac.h @@ -0,0 +1,69 @@ +/* + * Allwinner H3 EMAC emulation + * + * Copyright (C) 2019 Niek Linnenbank + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef ALLWINNER_H3_EMAC_H +#define ALLWINNER_H3_EMAC_H + +#include "qemu/units.h" +#include "net/net.h" +#include "qemu/fifo8.h" +#include "hw/net/mii.h" +#include "hw/sysbus.h" + +#define AW_H3_EMAC_REGS_MEM_SIZE (1024) + +#define TYPE_AW_H3_EMAC "allwinner-h3-emac" +#define AW_H3_EMAC(obj) OBJECT_CHECK(AwH3EmacState, (obj), TYPE_AW_H3_EMAC) + +typedef struct AwH3EmacState { + /*< private >*/ + SysBusDevice parent_obj; + /*< public >*/ + + MemoryRegion iomem; + qemu_irq irq; + NICState *nic; + NICConf conf; + + uint8_t mii_phy_addr; + uint32_t mii_cmd; + uint32_t mii_data; + uint32_t mii_cr; + uint32_t mii_st; + + uint32_t basic_ctl0; + uint32_t basic_ctl1; + uint32_t int_en; + uint32_t int_sta; + uint32_t frm_flt; + + uint32_t rx_ctl0; + uint32_t rx_ctl1; + uint32_t rx_desc_head; + uint32_t rx_desc_curr; + + uint32_t tx_ctl0; + uint32_t tx_ctl1; + uint32_t tx_desc_head; + uint32_t tx_desc_curr; + uint32_t tx_flowctl; + +} AwH3EmacState; + +#endif