/* * Allwinner Sun8i Ethernet MAC 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 "qemu/units.h" #include "qapi/error.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 "sysemu/dma.h" #include "hw/net/allwinner-sun8i-emac.h" /* EMAC register offsets */ enum { REG_BASIC_CTL_0 = 0x0000, /* Basic Control 0 */ REG_BASIC_CTL_1 = 0x0004, /* Basic Control 1 */ REG_INT_STA = 0x0008, /* Interrupt Status */ REG_INT_EN = 0x000C, /* Interrupt Enable */ REG_TX_CTL_0 = 0x0010, /* Transmit Control 0 */ REG_TX_CTL_1 = 0x0014, /* Transmit Control 1 */ REG_TX_FLOW_CTL = 0x001C, /* Transmit Flow Control */ REG_TX_DMA_DESC_LIST = 0x0020, /* Transmit Descriptor List Address */ REG_RX_CTL_0 = 0x0024, /* Receive Control 0 */ REG_RX_CTL_1 = 0x0028, /* Receive Control 1 */ REG_RX_DMA_DESC_LIST = 0x0034, /* Receive Descriptor List Address */ REG_FRM_FLT = 0x0038, /* Receive Frame Filter */ REG_RX_HASH_0 = 0x0040, /* Receive Hash Table 0 */ REG_RX_HASH_1 = 0x0044, /* Receive Hash Table 1 */ REG_MII_CMD = 0x0048, /* Management Interface Command */ REG_MII_DATA = 0x004C, /* Management Interface Data */ REG_ADDR_HIGH = 0x0050, /* MAC Address High */ REG_ADDR_LOW = 0x0054, /* MAC Address Low */ REG_TX_DMA_STA = 0x00B0, /* Transmit DMA Status */ REG_TX_CUR_DESC = 0x00B4, /* Transmit Current Descriptor */ REG_TX_CUR_BUF = 0x00B8, /* Transmit Current Buffer */ REG_RX_DMA_STA = 0x00C0, /* Receive DMA Status */ REG_RX_CUR_DESC = 0x00C4, /* Receive Current Descriptor */ REG_RX_CUR_BUF = 0x00C8, /* Receive Current Buffer */ REG_RGMII_STA = 0x00D0, /* RGMII Status */ }; /* EMAC register flags */ enum { BASIC_CTL0_100Mbps = (0b11 << 2), BASIC_CTL0_FD = (1 << 0), BASIC_CTL1_SOFTRST = (1 << 0), }; enum { INT_STA_RGMII_LINK = (1 << 16), INT_STA_RX_EARLY = (1 << 13), INT_STA_RX_OVERFLOW = (1 << 12), INT_STA_RX_TIMEOUT = (1 << 11), INT_STA_RX_DMA_STOP = (1 << 10), INT_STA_RX_BUF_UA = (1 << 9), INT_STA_RX = (1 << 8), INT_STA_TX_EARLY = (1 << 5), INT_STA_TX_UNDERFLOW = (1 << 4), INT_STA_TX_TIMEOUT = (1 << 3), INT_STA_TX_BUF_UA = (1 << 2), INT_STA_TX_DMA_STOP = (1 << 1), INT_STA_TX = (1 << 0), }; enum { INT_EN_RX_EARLY = (1 << 13), INT_EN_RX_OVERFLOW = (1 << 12), INT_EN_RX_TIMEOUT = (1 << 11), INT_EN_RX_DMA_STOP = (1 << 10), INT_EN_RX_BUF_UA = (1 << 9), INT_EN_RX = (1 << 8), INT_EN_TX_EARLY = (1 << 5), INT_EN_TX_UNDERFLOW = (1 << 4), INT_EN_TX_TIMEOUT = (1 << 3), INT_EN_TX_BUF_UA = (1 << 2), INT_EN_TX_DMA_STOP = (1 << 1), INT_EN_TX = (1 << 0), }; enum { TX_CTL0_TX_EN = (1 << 31), TX_CTL1_TX_DMA_START = (1 << 31), TX_CTL1_TX_DMA_EN = (1 << 30), TX_CTL1_TX_FLUSH = (1 << 0), }; enum { RX_CTL0_RX_EN = (1 << 31), RX_CTL0_STRIP_FCS = (1 << 28), RX_CTL0_CRC_IPV4 = (1 << 27), }; enum { RX_CTL1_RX_DMA_START = (1 << 31), RX_CTL1_RX_DMA_EN = (1 << 30), RX_CTL1_RX_MD = (1 << 1), }; enum { RX_FRM_FLT_DIS_ADDR = (1 << 31), }; enum { MII_CMD_PHY_ADDR_SHIFT = (12), MII_CMD_PHY_ADDR_MASK = (0xf000), MII_CMD_PHY_REG_SHIFT = (4), MII_CMD_PHY_REG_MASK = (0xf0), MII_CMD_PHY_RW = (1 << 1), MII_CMD_PHY_BUSY = (1 << 0), }; enum { TX_DMA_STA_STOP = (0b000), TX_DMA_STA_RUN_FETCH = (0b001), TX_DMA_STA_WAIT_STA = (0b010), }; enum { RX_DMA_STA_STOP = (0b000), RX_DMA_STA_RUN_FETCH = (0b001), RX_DMA_STA_WAIT_FRM = (0b011), }; /* EMAC register reset values */ enum { REG_BASIC_CTL_1_RST = 0x08000000, }; /* EMAC constants */ enum { AW_SUN8I_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 */ enum { DESC_STATUS_CTL = (1 << 31), DESC_STATUS2_BUF_SIZE_MASK = (0x7ff), }; /* Transmit frame descriptor flags */ enum { TX_DESC_STATUS_LENGTH_ERR = (1 << 14), TX_DESC_STATUS2_FIRST_DESC = (1 << 29), TX_DESC_STATUS2_LAST_DESC = (1 << 30), TX_DESC_STATUS2_CHECKSUM_MASK = (0x3 << 27), }; /* Receive frame descriptor flags */ enum { RX_DESC_STATUS_FIRST_DESC = (1 << 9), RX_DESC_STATUS_LAST_DESC = (1 << 8), RX_DESC_STATUS_FRM_LEN_MASK = (0x3fff0000), RX_DESC_STATUS_FRM_LEN_SHIFT = (16), RX_DESC_STATUS_NO_BUF = (1 << 14), RX_DESC_STATUS_HEADER_ERR = (1 << 7), RX_DESC_STATUS_LENGTH_ERR = (1 << 4), RX_DESC_STATUS_CRC_ERR = (1 << 1), RX_DESC_STATUS_PAYLOAD_ERR = (1 << 0), RX_DESC_STATUS2_RX_INT_CTL = (1 << 31), }; /* MII register offsets */ enum { MII_REG_CR = (0x0), /* Control */ MII_REG_ST = (0x1), /* Status */ MII_REG_ID_HIGH = (0x2), /* Identifier High */ MII_REG_ID_LOW = (0x3), /* Identifier Low */ MII_REG_ADV = (0x4), /* Advertised abilities */ MII_REG_LPA = (0x5), /* Link partner abilities */ }; /* MII register flags */ enum { MII_REG_CR_RESET = (1 << 15), MII_REG_CR_POWERDOWN = (1 << 11), MII_REG_CR_10Mbit = (0), MII_REG_CR_100Mbit = (1 << 13), MII_REG_CR_1000Mbit = (1 << 6), MII_REG_CR_AUTO_NEG = (1 << 12), MII_REG_CR_AUTO_NEG_RESTART = (1 << 9), MII_REG_CR_FULLDUPLEX = (1 << 8), }; enum { MII_REG_ST_100BASE_T4 = (1 << 15), MII_REG_ST_100BASE_X_FD = (1 << 14), MII_REG_ST_100BASE_X_HD = (1 << 13), MII_REG_ST_10_FD = (1 << 12), MII_REG_ST_10_HD = (1 << 11), MII_REG_ST_100BASE_T2_FD = (1 << 10), MII_REG_ST_100BASE_T2_HD = (1 << 9), MII_REG_ST_AUTONEG_COMPLETE = (1 << 5), MII_REG_ST_AUTONEG_AVAIL = (1 << 3), MII_REG_ST_LINK_UP = (1 << 2), }; enum { MII_REG_LPA_10_HD = (1 << 5), MII_REG_LPA_10_FD = (1 << 6), MII_REG_LPA_100_HD = (1 << 7), MII_REG_LPA_100_FD = (1 << 8), MII_REG_LPA_PAUSE = (1 << 10), MII_REG_LPA_ASYMPAUSE = (1 << 11), }; /* MII constants */ enum { MII_PHY_ID_HIGH = 0x0044, MII_PHY_ID_LOW = 0x1400, }; static void allwinner_sun8i_emac_mii_set_link(AwSun8iEmacState *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 allwinner_sun8i_emac_mii_reset(AwSun8iEmacState *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; s->mii_adv = 0; allwinner_sun8i_emac_mii_set_link(s, link_active); } static void allwinner_sun8i_emac_mii_cmd(AwSun8iEmacState *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_allwinner_sun8i_emac_mii_write_reg(reg, s->mii_data); switch (reg) { case MII_REG_CR: if (s->mii_data & MII_REG_CR_RESET) { allwinner_sun8i_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; case MII_REG_ADV: s->mii_adv = s->mii_data; break; case MII_REG_ID_HIGH: case MII_REG_ID_LOW: case MII_REG_LPA: 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; case MII_REG_ADV: s->mii_data = s->mii_adv; break; case MII_REG_LPA: s->mii_data = MII_REG_LPA_10_HD | MII_REG_LPA_10_FD | MII_REG_LPA_100_HD | MII_REG_LPA_100_FD | MII_REG_LPA_PAUSE | MII_REG_LPA_ASYMPAUSE; 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_allwinner_sun8i_emac_mii_read_reg(reg, s->mii_data); } } static void allwinner_sun8i_emac_update_irq(AwSun8iEmacState *s) { qemu_set_irq(s->irq, (s->int_sta & s->int_en) != 0); } static bool allwinner_sun8i_emac_desc_owned(FrameDescriptor *desc, size_t min_buf_size) { return (desc->status & DESC_STATUS_CTL) && (min_buf_size == 0 || (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_buf_size); } static void allwinner_sun8i_emac_get_desc(AwSun8iEmacState *s, FrameDescriptor *desc, uint32_t phys_addr) { uint32_t desc_words[4]; dma_memory_read(&s->dma_as, phys_addr, &desc_words, sizeof(desc_words), MEMTXATTRS_UNSPECIFIED); desc->status = le32_to_cpu(desc_words[0]); desc->status2 = le32_to_cpu(desc_words[1]); desc->addr = le32_to_cpu(desc_words[2]); desc->next = le32_to_cpu(desc_words[3]); } static uint32_t allwinner_sun8i_emac_next_desc(AwSun8iEmacState *s, FrameDescriptor *desc) { const uint32_t nxt = desc->next; allwinner_sun8i_emac_get_desc(s, desc, nxt); return nxt; } static uint32_t allwinner_sun8i_emac_find_desc(AwSun8iEmacState *s, 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) { allwinner_sun8i_emac_get_desc(s, desc, desc_addr); if (allwinner_sun8i_emac_desc_owned(desc, min_size)) { return desc_addr; } else if (desc->next == start_addr) { break; } else { desc_addr = desc->next; } } return 0; } static uint32_t allwinner_sun8i_emac_rx_desc(AwSun8iEmacState *s, FrameDescriptor *desc, size_t min_size) { return allwinner_sun8i_emac_find_desc(s, desc, s->rx_desc_curr, min_size); } static uint32_t allwinner_sun8i_emac_tx_desc(AwSun8iEmacState *s, FrameDescriptor *desc) { allwinner_sun8i_emac_get_desc(s, desc, s->tx_desc_curr); return s->tx_desc_curr; } static void allwinner_sun8i_emac_flush_desc(AwSun8iEmacState *s, const FrameDescriptor *desc, uint32_t phys_addr) { uint32_t desc_words[4]; desc_words[0] = cpu_to_le32(desc->status); desc_words[1] = cpu_to_le32(desc->status2); desc_words[2] = cpu_to_le32(desc->addr); desc_words[3] = cpu_to_le32(desc->next); dma_memory_write(&s->dma_as, phys_addr, &desc_words, sizeof(desc_words), MEMTXATTRS_UNSPECIFIED); } static bool allwinner_sun8i_emac_can_receive(NetClientState *nc) { AwSun8iEmacState *s = qemu_get_nic_opaque(nc); FrameDescriptor desc; return (s->rx_ctl0 & RX_CTL0_RX_EN) && (allwinner_sun8i_emac_rx_desc(s, &desc, 0) != 0); } static ssize_t allwinner_sun8i_emac_receive(NetClientState *nc, const uint8_t *buf, size_t size) { AwSun8iEmacState *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 = allwinner_sun8i_emac_rx_desc(s, &desc, AW_SUN8I_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_SUN8I_EMAC_MIN_PKT_SZ) { padding += (AW_SUN8I_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; } dma_memory_write(&s->dma_as, desc.addr, buf, desc_bytes, MEMTXATTRS_UNSPECIFIED); allwinner_sun8i_emac_flush_desc(s, &desc, s->rx_desc_curr); trace_allwinner_sun8i_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 = allwinner_sun8i_emac_find_desc(s, &desc, desc.next, AW_SUN8I_EMAC_MIN_PKT_SZ); 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; allwinner_sun8i_emac_update_irq(s); return size; } static void allwinner_sun8i_emac_transmit(AwSun8iEmacState *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 = allwinner_sun8i_emac_tx_desc(s, &desc); /* Read all transmit descriptors */ while (allwinner_sun8i_emac_desc_owned(&desc, 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; } dma_memory_read(&s->dma_as, desc.addr, packet_buf + packet_bytes, bytes, MEMTXATTRS_UNSPECIFIED); packet_bytes += bytes; desc.status &= ~DESC_STATUS_CTL; allwinner_sun8i_emac_flush_desc(s, &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, CSUM_ALL); } qemu_send_packet(nc, packet_buf, packet_bytes); trace_allwinner_sun8i_emac_transmit(s->tx_desc_curr, desc.addr, bytes); packet_bytes = 0; transmitted++; } s->tx_desc_curr = allwinner_sun8i_emac_next_desc(s, &desc); } /* Raise transmit completed interrupt */ if (transmitted > 0) { s->int_sta |= INT_STA_TX; s->tx_ctl1 &= ~TX_CTL1_TX_DMA_START; allwinner_sun8i_emac_update_irq(s); } } static void allwinner_sun8i_emac_reset(DeviceState *dev) { AwSun8iEmacState *s = AW_SUN8I_EMAC(dev); NetClientState *nc = qemu_get_queue(s->nic); trace_allwinner_sun8i_emac_reset(); s->mii_cmd = 0; s->mii_data = 0; s->basic_ctl0 = 0; s->basic_ctl1 = REG_BASIC_CTL_1_RST; 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; allwinner_sun8i_emac_mii_reset(s, !nc->link_down); } static uint64_t allwinner_sun8i_emac_read(void *opaque, hwaddr offset, unsigned size) { AwSun8iEmacState *s = AW_SUN8I_EMAC(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: /* Interrupt 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 = lduw_le_p(s->conf.macaddr.a + 4); break; case REG_ADDR_LOW: /* MAC Address Low */ value = ldl_le_p(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) { allwinner_sun8i_emac_get_desc(s, &desc, s->tx_desc_curr); 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) { allwinner_sun8i_emac_get_desc(s, &desc, s->rx_desc_curr); value = desc.addr; } else { value = 0; } break; case REG_RGMII_STA: /* RGMII Status */ break; default: qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to unknown " "EMAC register 0x" HWADDR_FMT_plx "\n", offset); } trace_allwinner_sun8i_emac_read(offset, value); return value; } static void allwinner_sun8i_emac_write(void *opaque, hwaddr offset, uint64_t value, unsigned size) { AwSun8iEmacState *s = AW_SUN8I_EMAC(opaque); NetClientState *nc = qemu_get_queue(s->nic); trace_allwinner_sun8i_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) { allwinner_sun8i_emac_reset(DEVICE(s)); value &= ~BASIC_CTL1_SOFTRST; } s->basic_ctl1 = value; if (allwinner_sun8i_emac_can_receive(nc)) { qemu_flush_queued_packets(nc); } break; case REG_INT_STA: /* Interrupt Status */ s->int_sta &= ~value; allwinner_sun8i_emac_update_irq(s); break; case REG_INT_EN: /* Interrupt Enable */ s->int_en = value; allwinner_sun8i_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) { allwinner_sun8i_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) && allwinner_sun8i_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; allwinner_sun8i_emac_mii_cmd(s); break; case REG_MII_DATA: /* Management Interface Data */ s->mii_data = value; break; case REG_ADDR_HIGH: /* MAC Address High */ stw_le_p(s->conf.macaddr.a + 4, value); break; case REG_ADDR_LOW: /* MAC Address Low */ stl_le_p(s->conf.macaddr.a, value); 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" HWADDR_FMT_plx "\n", offset); } } static void allwinner_sun8i_emac_set_link(NetClientState *nc) { AwSun8iEmacState *s = qemu_get_nic_opaque(nc); trace_allwinner_sun8i_emac_set_link(!nc->link_down); allwinner_sun8i_emac_mii_set_link(s, !nc->link_down); } static const MemoryRegionOps allwinner_sun8i_emac_mem_ops = { .read = allwinner_sun8i_emac_read, .write = allwinner_sun8i_emac_write, .endianness = DEVICE_NATIVE_ENDIAN, .valid = { .min_access_size = 4, .max_access_size = 4, }, .impl.min_access_size = 4, }; static NetClientInfo net_allwinner_sun8i_emac_info = { .type = NET_CLIENT_DRIVER_NIC, .size = sizeof(NICState), .can_receive = allwinner_sun8i_emac_can_receive, .receive = allwinner_sun8i_emac_receive, .link_status_changed = allwinner_sun8i_emac_set_link, }; static void allwinner_sun8i_emac_init(Object *obj) { SysBusDevice *sbd = SYS_BUS_DEVICE(obj); AwSun8iEmacState *s = AW_SUN8I_EMAC(obj); memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sun8i_emac_mem_ops, s, TYPE_AW_SUN8I_EMAC, 64 * KiB); sysbus_init_mmio(sbd, &s->iomem); sysbus_init_irq(sbd, &s->irq); } static void allwinner_sun8i_emac_realize(DeviceState *dev, Error **errp) { AwSun8iEmacState *s = AW_SUN8I_EMAC(dev); if (!s->dma_mr) { error_setg(errp, TYPE_AW_SUN8I_EMAC " 'dma-memory' link not set"); return; } address_space_init(&s->dma_as, s->dma_mr, "emac-dma"); qemu_macaddr_default_if_unset(&s->conf.macaddr); s->nic = qemu_new_nic(&net_allwinner_sun8i_emac_info, &s->conf, object_get_typename(OBJECT(dev)), dev->id, &dev->mem_reentrancy_guard, s); qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); } static Property allwinner_sun8i_emac_properties[] = { DEFINE_NIC_PROPERTIES(AwSun8iEmacState, conf), DEFINE_PROP_UINT8("phy-addr", AwSun8iEmacState, mii_phy_addr, 0), DEFINE_PROP_LINK("dma-memory", AwSun8iEmacState, dma_mr, TYPE_MEMORY_REGION, MemoryRegion *), DEFINE_PROP_END_OF_LIST(), }; static int allwinner_sun8i_emac_post_load(void *opaque, int version_id) { AwSun8iEmacState *s = opaque; allwinner_sun8i_emac_set_link(qemu_get_queue(s->nic)); return 0; } static const VMStateDescription vmstate_aw_emac = { .name = "allwinner-sun8i-emac", .version_id = 1, .minimum_version_id = 1, .post_load = allwinner_sun8i_emac_post_load, .fields = (const VMStateField[]) { VMSTATE_UINT8(mii_phy_addr, AwSun8iEmacState), VMSTATE_UINT32(mii_cmd, AwSun8iEmacState), VMSTATE_UINT32(mii_data, AwSun8iEmacState), VMSTATE_UINT32(mii_cr, AwSun8iEmacState), VMSTATE_UINT32(mii_st, AwSun8iEmacState), VMSTATE_UINT32(mii_adv, AwSun8iEmacState), VMSTATE_UINT32(basic_ctl0, AwSun8iEmacState), VMSTATE_UINT32(basic_ctl1, AwSun8iEmacState), VMSTATE_UINT32(int_en, AwSun8iEmacState), VMSTATE_UINT32(int_sta, AwSun8iEmacState), VMSTATE_UINT32(frm_flt, AwSun8iEmacState), VMSTATE_UINT32(rx_ctl0, AwSun8iEmacState), VMSTATE_UINT32(rx_ctl1, AwSun8iEmacState), VMSTATE_UINT32(rx_desc_head, AwSun8iEmacState), VMSTATE_UINT32(rx_desc_curr, AwSun8iEmacState), VMSTATE_UINT32(tx_ctl0, AwSun8iEmacState), VMSTATE_UINT32(tx_ctl1, AwSun8iEmacState), VMSTATE_UINT32(tx_desc_head, AwSun8iEmacState), VMSTATE_UINT32(tx_desc_curr, AwSun8iEmacState), VMSTATE_UINT32(tx_flowctl, AwSun8iEmacState), VMSTATE_END_OF_LIST() } }; static void allwinner_sun8i_emac_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->realize = allwinner_sun8i_emac_realize; device_class_set_legacy_reset(dc, allwinner_sun8i_emac_reset); dc->vmsd = &vmstate_aw_emac; device_class_set_props(dc, allwinner_sun8i_emac_properties); } static const TypeInfo allwinner_sun8i_emac_info = { .name = TYPE_AW_SUN8I_EMAC, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(AwSun8iEmacState), .instance_init = allwinner_sun8i_emac_init, .class_init = allwinner_sun8i_emac_class_init, }; static void allwinner_sun8i_emac_register_types(void) { type_register_static(&allwinner_sun8i_emac_info); } type_init(allwinner_sun8i_emac_register_types)