| /* |
| * QEMU NS SONIC DP8393x netcard |
| * |
| * Copyright (c) 2008-2009 Herve Poussineau |
| * |
| * 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 <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "hw.h" |
| #include "qemu-timer.h" |
| #include "net.h" |
| #include "mips.h" |
| |
| //#define DEBUG_SONIC |
| |
| /* Calculate CRCs properly on Rx packets */ |
| #define SONIC_CALCULATE_RXCRC |
| |
| #if defined(SONIC_CALCULATE_RXCRC) |
| /* For crc32 */ |
| #include <zlib.h> |
| #endif |
| |
| #ifdef DEBUG_SONIC |
| #define DPRINTF(fmt, ...) \ |
| do { printf("sonic: " fmt , ## __VA_ARGS__); } while (0) |
| static const char* reg_names[] = { |
| "CR", "DCR", "RCR", "TCR", "IMR", "ISR", "UTDA", "CTDA", |
| "TPS", "TFC", "TSA0", "TSA1", "TFS", "URDA", "CRDA", "CRBA0", |
| "CRBA1", "RBWC0", "RBWC1", "EOBC", "URRA", "RSA", "REA", "RRP", |
| "RWP", "TRBA0", "TRBA1", "0x1b", "0x1c", "0x1d", "0x1e", "LLFA", |
| "TTDA", "CEP", "CAP2", "CAP1", "CAP0", "CE", "CDP", "CDC", |
| "SR", "WT0", "WT1", "RSC", "CRCT", "FAET", "MPT", "MDT", |
| "0x30", "0x31", "0x32", "0x33", "0x34", "0x35", "0x36", "0x37", |
| "0x38", "0x39", "0x3a", "0x3b", "0x3c", "0x3d", "0x3e", "DCR2" }; |
| #else |
| #define DPRINTF(fmt, ...) do {} while (0) |
| #endif |
| |
| #define SONIC_ERROR(fmt, ...) \ |
| do { printf("sonic ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0) |
| |
| #define SONIC_CR 0x00 |
| #define SONIC_DCR 0x01 |
| #define SONIC_RCR 0x02 |
| #define SONIC_TCR 0x03 |
| #define SONIC_IMR 0x04 |
| #define SONIC_ISR 0x05 |
| #define SONIC_UTDA 0x06 |
| #define SONIC_CTDA 0x07 |
| #define SONIC_TPS 0x08 |
| #define SONIC_TFC 0x09 |
| #define SONIC_TSA0 0x0a |
| #define SONIC_TSA1 0x0b |
| #define SONIC_TFS 0x0c |
| #define SONIC_URDA 0x0d |
| #define SONIC_CRDA 0x0e |
| #define SONIC_CRBA0 0x0f |
| #define SONIC_CRBA1 0x10 |
| #define SONIC_RBWC0 0x11 |
| #define SONIC_RBWC1 0x12 |
| #define SONIC_EOBC 0x13 |
| #define SONIC_URRA 0x14 |
| #define SONIC_RSA 0x15 |
| #define SONIC_REA 0x16 |
| #define SONIC_RRP 0x17 |
| #define SONIC_RWP 0x18 |
| #define SONIC_TRBA0 0x19 |
| #define SONIC_TRBA1 0x1a |
| #define SONIC_LLFA 0x1f |
| #define SONIC_TTDA 0x20 |
| #define SONIC_CEP 0x21 |
| #define SONIC_CAP2 0x22 |
| #define SONIC_CAP1 0x23 |
| #define SONIC_CAP0 0x24 |
| #define SONIC_CE 0x25 |
| #define SONIC_CDP 0x26 |
| #define SONIC_CDC 0x27 |
| #define SONIC_SR 0x28 |
| #define SONIC_WT0 0x29 |
| #define SONIC_WT1 0x2a |
| #define SONIC_RSC 0x2b |
| #define SONIC_CRCT 0x2c |
| #define SONIC_FAET 0x2d |
| #define SONIC_MPT 0x2e |
| #define SONIC_MDT 0x2f |
| #define SONIC_DCR2 0x3f |
| |
| #define SONIC_CR_HTX 0x0001 |
| #define SONIC_CR_TXP 0x0002 |
| #define SONIC_CR_RXDIS 0x0004 |
| #define SONIC_CR_RXEN 0x0008 |
| #define SONIC_CR_STP 0x0010 |
| #define SONIC_CR_ST 0x0020 |
| #define SONIC_CR_RST 0x0080 |
| #define SONIC_CR_RRRA 0x0100 |
| #define SONIC_CR_LCAM 0x0200 |
| #define SONIC_CR_MASK 0x03bf |
| |
| #define SONIC_DCR_DW 0x0020 |
| #define SONIC_DCR_LBR 0x2000 |
| #define SONIC_DCR_EXBUS 0x8000 |
| |
| #define SONIC_RCR_PRX 0x0001 |
| #define SONIC_RCR_LBK 0x0002 |
| #define SONIC_RCR_FAER 0x0004 |
| #define SONIC_RCR_CRCR 0x0008 |
| #define SONIC_RCR_CRS 0x0020 |
| #define SONIC_RCR_LPKT 0x0040 |
| #define SONIC_RCR_BC 0x0080 |
| #define SONIC_RCR_MC 0x0100 |
| #define SONIC_RCR_LB0 0x0200 |
| #define SONIC_RCR_LB1 0x0400 |
| #define SONIC_RCR_AMC 0x0800 |
| #define SONIC_RCR_PRO 0x1000 |
| #define SONIC_RCR_BRD 0x2000 |
| #define SONIC_RCR_RNT 0x4000 |
| |
| #define SONIC_TCR_PTX 0x0001 |
| #define SONIC_TCR_BCM 0x0002 |
| #define SONIC_TCR_FU 0x0004 |
| #define SONIC_TCR_EXC 0x0040 |
| #define SONIC_TCR_CRSL 0x0080 |
| #define SONIC_TCR_NCRS 0x0100 |
| #define SONIC_TCR_EXD 0x0400 |
| #define SONIC_TCR_CRCI 0x2000 |
| #define SONIC_TCR_PINT 0x8000 |
| |
| #define SONIC_ISR_RBE 0x0020 |
| #define SONIC_ISR_RDE 0x0040 |
| #define SONIC_ISR_TC 0x0080 |
| #define SONIC_ISR_TXDN 0x0200 |
| #define SONIC_ISR_PKTRX 0x0400 |
| #define SONIC_ISR_PINT 0x0800 |
| #define SONIC_ISR_LCD 0x1000 |
| |
| typedef struct dp8393xState { |
| /* Hardware */ |
| int it_shift; |
| qemu_irq irq; |
| #ifdef DEBUG_SONIC |
| int irq_level; |
| #endif |
| QEMUTimer *watchdog; |
| int64_t wt_last_update; |
| NICConf conf; |
| NICState *nic; |
| MemoryRegion *address_space; |
| MemoryRegion mmio; |
| |
| /* Registers */ |
| uint8_t cam[16][6]; |
| uint16_t regs[0x40]; |
| |
| /* Temporaries */ |
| uint8_t tx_buffer[0x10000]; |
| int loopback_packet; |
| |
| /* Memory access */ |
| void (*memory_rw)(void *opaque, hwaddr addr, uint8_t *buf, int len, int is_write); |
| void* mem_opaque; |
| } dp8393xState; |
| |
| static void dp8393x_update_irq(dp8393xState *s) |
| { |
| int level = (s->regs[SONIC_IMR] & s->regs[SONIC_ISR]) ? 1 : 0; |
| |
| #ifdef DEBUG_SONIC |
| if (level != s->irq_level) { |
| s->irq_level = level; |
| if (level) { |
| DPRINTF("raise irq, isr is 0x%04x\n", s->regs[SONIC_ISR]); |
| } else { |
| DPRINTF("lower irq\n"); |
| } |
| } |
| #endif |
| |
| qemu_set_irq(s->irq, level); |
| } |
| |
| static void do_load_cam(dp8393xState *s) |
| { |
| uint16_t data[8]; |
| int width, size; |
| uint16_t index = 0; |
| |
| width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
| size = sizeof(uint16_t) * 4 * width; |
| |
| while (s->regs[SONIC_CDC] & 0x1f) { |
| /* Fill current entry */ |
| s->memory_rw(s->mem_opaque, |
| (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP], |
| (uint8_t *)data, size, 0); |
| s->cam[index][0] = data[1 * width] & 0xff; |
| s->cam[index][1] = data[1 * width] >> 8; |
| s->cam[index][2] = data[2 * width] & 0xff; |
| s->cam[index][3] = data[2 * width] >> 8; |
| s->cam[index][4] = data[3 * width] & 0xff; |
| s->cam[index][5] = data[3 * width] >> 8; |
| DPRINTF("load cam[%d] with %02x%02x%02x%02x%02x%02x\n", index, |
| s->cam[index][0], s->cam[index][1], s->cam[index][2], |
| s->cam[index][3], s->cam[index][4], s->cam[index][5]); |
| /* Move to next entry */ |
| s->regs[SONIC_CDC]--; |
| s->regs[SONIC_CDP] += size; |
| index++; |
| } |
| |
| /* Read CAM enable */ |
| s->memory_rw(s->mem_opaque, |
| (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP], |
| (uint8_t *)data, size, 0); |
| s->regs[SONIC_CE] = data[0 * width]; |
| DPRINTF("load cam done. cam enable mask 0x%04x\n", s->regs[SONIC_CE]); |
| |
| /* Done */ |
| s->regs[SONIC_CR] &= ~SONIC_CR_LCAM; |
| s->regs[SONIC_ISR] |= SONIC_ISR_LCD; |
| dp8393x_update_irq(s); |
| } |
| |
| static void do_read_rra(dp8393xState *s) |
| { |
| uint16_t data[8]; |
| int width, size; |
| |
| /* Read memory */ |
| width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
| size = sizeof(uint16_t) * 4 * width; |
| s->memory_rw(s->mem_opaque, |
| (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_RRP], |
| (uint8_t *)data, size, 0); |
| |
| /* Update SONIC registers */ |
| s->regs[SONIC_CRBA0] = data[0 * width]; |
| s->regs[SONIC_CRBA1] = data[1 * width]; |
| s->regs[SONIC_RBWC0] = data[2 * width]; |
| s->regs[SONIC_RBWC1] = data[3 * width]; |
| DPRINTF("CRBA0/1: 0x%04x/0x%04x, RBWC0/1: 0x%04x/0x%04x\n", |
| s->regs[SONIC_CRBA0], s->regs[SONIC_CRBA1], |
| s->regs[SONIC_RBWC0], s->regs[SONIC_RBWC1]); |
| |
| /* Go to next entry */ |
| s->regs[SONIC_RRP] += size; |
| |
| /* Handle wrap */ |
| if (s->regs[SONIC_RRP] == s->regs[SONIC_REA]) { |
| s->regs[SONIC_RRP] = s->regs[SONIC_RSA]; |
| } |
| |
| /* Check resource exhaustion */ |
| if (s->regs[SONIC_RRP] == s->regs[SONIC_RWP]) |
| { |
| s->regs[SONIC_ISR] |= SONIC_ISR_RBE; |
| dp8393x_update_irq(s); |
| } |
| |
| /* Done */ |
| s->regs[SONIC_CR] &= ~SONIC_CR_RRRA; |
| } |
| |
| static void do_software_reset(dp8393xState *s) |
| { |
| qemu_del_timer(s->watchdog); |
| |
| s->regs[SONIC_CR] &= ~(SONIC_CR_LCAM | SONIC_CR_RRRA | SONIC_CR_TXP | SONIC_CR_HTX); |
| s->regs[SONIC_CR] |= SONIC_CR_RST | SONIC_CR_RXDIS; |
| } |
| |
| static void set_next_tick(dp8393xState *s) |
| { |
| uint32_t ticks; |
| int64_t delay; |
| |
| if (s->regs[SONIC_CR] & SONIC_CR_STP) { |
| qemu_del_timer(s->watchdog); |
| return; |
| } |
| |
| ticks = s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0]; |
| s->wt_last_update = qemu_get_clock_ns(vm_clock); |
| delay = get_ticks_per_sec() * ticks / 5000000; |
| qemu_mod_timer(s->watchdog, s->wt_last_update + delay); |
| } |
| |
| static void update_wt_regs(dp8393xState *s) |
| { |
| int64_t elapsed; |
| uint32_t val; |
| |
| if (s->regs[SONIC_CR] & SONIC_CR_STP) { |
| qemu_del_timer(s->watchdog); |
| return; |
| } |
| |
| elapsed = s->wt_last_update - qemu_get_clock_ns(vm_clock); |
| val = s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0]; |
| val -= elapsed / 5000000; |
| s->regs[SONIC_WT1] = (val >> 16) & 0xffff; |
| s->regs[SONIC_WT0] = (val >> 0) & 0xffff; |
| set_next_tick(s); |
| |
| } |
| |
| static void do_start_timer(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_STP; |
| set_next_tick(s); |
| } |
| |
| static void do_stop_timer(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_ST; |
| update_wt_regs(s); |
| } |
| |
| static void do_receiver_enable(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_RXDIS; |
| } |
| |
| static void do_receiver_disable(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_RXEN; |
| } |
| |
| static void do_transmit_packets(dp8393xState *s) |
| { |
| uint16_t data[12]; |
| int width, size; |
| int tx_len, len; |
| uint16_t i; |
| |
| width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
| |
| while (1) { |
| /* Read memory */ |
| DPRINTF("Transmit packet at %08x\n", |
| (s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_CTDA]); |
| size = sizeof(uint16_t) * 6 * width; |
| s->regs[SONIC_TTDA] = s->regs[SONIC_CTDA]; |
| s->memory_rw(s->mem_opaque, |
| ((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * width, |
| (uint8_t *)data, size, 0); |
| tx_len = 0; |
| |
| /* Update registers */ |
| s->regs[SONIC_TCR] = data[0 * width] & 0xf000; |
| s->regs[SONIC_TPS] = data[1 * width]; |
| s->regs[SONIC_TFC] = data[2 * width]; |
| s->regs[SONIC_TSA0] = data[3 * width]; |
| s->regs[SONIC_TSA1] = data[4 * width]; |
| s->regs[SONIC_TFS] = data[5 * width]; |
| |
| /* Handle programmable interrupt */ |
| if (s->regs[SONIC_TCR] & SONIC_TCR_PINT) { |
| s->regs[SONIC_ISR] |= SONIC_ISR_PINT; |
| } else { |
| s->regs[SONIC_ISR] &= ~SONIC_ISR_PINT; |
| } |
| |
| for (i = 0; i < s->regs[SONIC_TFC]; ) { |
| /* Append fragment */ |
| len = s->regs[SONIC_TFS]; |
| if (tx_len + len > sizeof(s->tx_buffer)) { |
| len = sizeof(s->tx_buffer) - tx_len; |
| } |
| s->memory_rw(s->mem_opaque, |
| (s->regs[SONIC_TSA1] << 16) | s->regs[SONIC_TSA0], |
| &s->tx_buffer[tx_len], len, 0); |
| tx_len += len; |
| |
| i++; |
| if (i != s->regs[SONIC_TFC]) { |
| /* Read next fragment details */ |
| size = sizeof(uint16_t) * 3 * width; |
| s->memory_rw(s->mem_opaque, |
| ((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * (4 + 3 * i) * width, |
| (uint8_t *)data, size, 0); |
| s->regs[SONIC_TSA0] = data[0 * width]; |
| s->regs[SONIC_TSA1] = data[1 * width]; |
| s->regs[SONIC_TFS] = data[2 * width]; |
| } |
| } |
| |
| /* Handle Ethernet checksum */ |
| if (!(s->regs[SONIC_TCR] & SONIC_TCR_CRCI)) { |
| /* Don't append FCS there, to look like slirp packets |
| * which don't have one */ |
| } else { |
| /* Remove existing FCS */ |
| tx_len -= 4; |
| } |
| |
| if (s->regs[SONIC_RCR] & (SONIC_RCR_LB1 | SONIC_RCR_LB0)) { |
| /* Loopback */ |
| s->regs[SONIC_TCR] |= SONIC_TCR_CRSL; |
| if (s->nic->nc.info->can_receive(&s->nic->nc)) { |
| s->loopback_packet = 1; |
| s->nic->nc.info->receive(&s->nic->nc, s->tx_buffer, tx_len); |
| } |
| } else { |
| /* Transmit packet */ |
| qemu_send_packet(&s->nic->nc, s->tx_buffer, tx_len); |
| } |
| s->regs[SONIC_TCR] |= SONIC_TCR_PTX; |
| |
| /* Write status */ |
| data[0 * width] = s->regs[SONIC_TCR] & 0x0fff; /* status */ |
| size = sizeof(uint16_t) * width; |
| s->memory_rw(s->mem_opaque, |
| (s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA], |
| (uint8_t *)data, size, 1); |
| |
| if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) { |
| /* Read footer of packet */ |
| size = sizeof(uint16_t) * width; |
| s->memory_rw(s->mem_opaque, |
| ((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * (4 + 3 * s->regs[SONIC_TFC]) * width, |
| (uint8_t *)data, size, 0); |
| s->regs[SONIC_CTDA] = data[0 * width] & ~0x1; |
| if (data[0 * width] & 0x1) { |
| /* EOL detected */ |
| break; |
| } |
| } |
| } |
| |
| /* Done */ |
| s->regs[SONIC_CR] &= ~SONIC_CR_TXP; |
| s->regs[SONIC_ISR] |= SONIC_ISR_TXDN; |
| dp8393x_update_irq(s); |
| } |
| |
| static void do_halt_transmission(dp8393xState *s) |
| { |
| /* Nothing to do */ |
| } |
| |
| static void do_command(dp8393xState *s, uint16_t command) |
| { |
| if ((s->regs[SONIC_CR] & SONIC_CR_RST) && !(command & SONIC_CR_RST)) { |
| s->regs[SONIC_CR] &= ~SONIC_CR_RST; |
| return; |
| } |
| |
| s->regs[SONIC_CR] |= (command & SONIC_CR_MASK); |
| |
| if (command & SONIC_CR_HTX) |
| do_halt_transmission(s); |
| if (command & SONIC_CR_TXP) |
| do_transmit_packets(s); |
| if (command & SONIC_CR_RXDIS) |
| do_receiver_disable(s); |
| if (command & SONIC_CR_RXEN) |
| do_receiver_enable(s); |
| if (command & SONIC_CR_STP) |
| do_stop_timer(s); |
| if (command & SONIC_CR_ST) |
| do_start_timer(s); |
| if (command & SONIC_CR_RST) |
| do_software_reset(s); |
| if (command & SONIC_CR_RRRA) |
| do_read_rra(s); |
| if (command & SONIC_CR_LCAM) |
| do_load_cam(s); |
| } |
| |
| static uint16_t read_register(dp8393xState *s, int reg) |
| { |
| uint16_t val = 0; |
| |
| switch (reg) { |
| /* Update data before reading it */ |
| case SONIC_WT0: |
| case SONIC_WT1: |
| update_wt_regs(s); |
| val = s->regs[reg]; |
| break; |
| /* Accept read to some registers only when in reset mode */ |
| case SONIC_CAP2: |
| case SONIC_CAP1: |
| case SONIC_CAP0: |
| if (s->regs[SONIC_CR] & SONIC_CR_RST) { |
| val = s->cam[s->regs[SONIC_CEP] & 0xf][2* (SONIC_CAP0 - reg) + 1] << 8; |
| val |= s->cam[s->regs[SONIC_CEP] & 0xf][2* (SONIC_CAP0 - reg)]; |
| } |
| break; |
| /* All other registers have no special contrainst */ |
| default: |
| val = s->regs[reg]; |
| } |
| |
| DPRINTF("read 0x%04x from reg %s\n", val, reg_names[reg]); |
| |
| return val; |
| } |
| |
| static void write_register(dp8393xState *s, int reg, uint16_t val) |
| { |
| DPRINTF("write 0x%04x to reg %s\n", val, reg_names[reg]); |
| |
| switch (reg) { |
| /* Command register */ |
| case SONIC_CR: |
| do_command(s, val); |
| break; |
| /* Prevent write to read-only registers */ |
| case SONIC_CAP2: |
| case SONIC_CAP1: |
| case SONIC_CAP0: |
| case SONIC_SR: |
| case SONIC_MDT: |
| DPRINTF("writing to reg %d invalid\n", reg); |
| break; |
| /* Accept write to some registers only when in reset mode */ |
| case SONIC_DCR: |
| if (s->regs[SONIC_CR] & SONIC_CR_RST) { |
| s->regs[reg] = val & 0xbfff; |
| } else { |
| DPRINTF("writing to DCR invalid\n"); |
| } |
| break; |
| case SONIC_DCR2: |
| if (s->regs[SONIC_CR] & SONIC_CR_RST) { |
| s->regs[reg] = val & 0xf017; |
| } else { |
| DPRINTF("writing to DCR2 invalid\n"); |
| } |
| break; |
| /* 12 lower bytes are Read Only */ |
| case SONIC_TCR: |
| s->regs[reg] = val & 0xf000; |
| break; |
| /* 9 lower bytes are Read Only */ |
| case SONIC_RCR: |
| s->regs[reg] = val & 0xffe0; |
| break; |
| /* Ignore most significant bit */ |
| case SONIC_IMR: |
| s->regs[reg] = val & 0x7fff; |
| dp8393x_update_irq(s); |
| break; |
| /* Clear bits by writing 1 to them */ |
| case SONIC_ISR: |
| val &= s->regs[reg]; |
| s->regs[reg] &= ~val; |
| if (val & SONIC_ISR_RBE) { |
| do_read_rra(s); |
| } |
| dp8393x_update_irq(s); |
| break; |
| /* Ignore least significant bit */ |
| case SONIC_RSA: |
| case SONIC_REA: |
| case SONIC_RRP: |
| case SONIC_RWP: |
| s->regs[reg] = val & 0xfffe; |
| break; |
| /* Invert written value for some registers */ |
| case SONIC_CRCT: |
| case SONIC_FAET: |
| case SONIC_MPT: |
| s->regs[reg] = val ^ 0xffff; |
| break; |
| /* All other registers have no special contrainst */ |
| default: |
| s->regs[reg] = val; |
| } |
| |
| if (reg == SONIC_WT0 || reg == SONIC_WT1) { |
| set_next_tick(s); |
| } |
| } |
| |
| static void dp8393x_watchdog(void *opaque) |
| { |
| dp8393xState *s = opaque; |
| |
| if (s->regs[SONIC_CR] & SONIC_CR_STP) { |
| return; |
| } |
| |
| s->regs[SONIC_WT1] = 0xffff; |
| s->regs[SONIC_WT0] = 0xffff; |
| set_next_tick(s); |
| |
| /* Signal underflow */ |
| s->regs[SONIC_ISR] |= SONIC_ISR_TC; |
| dp8393x_update_irq(s); |
| } |
| |
| static uint32_t dp8393x_readw(void *opaque, hwaddr addr) |
| { |
| dp8393xState *s = opaque; |
| int reg; |
| |
| if ((addr & ((1 << s->it_shift) - 1)) != 0) { |
| return 0; |
| } |
| |
| reg = addr >> s->it_shift; |
| return read_register(s, reg); |
| } |
| |
| static uint32_t dp8393x_readb(void *opaque, hwaddr addr) |
| { |
| uint16_t v = dp8393x_readw(opaque, addr & ~0x1); |
| return (v >> (8 * (addr & 0x1))) & 0xff; |
| } |
| |
| static uint32_t dp8393x_readl(void *opaque, hwaddr addr) |
| { |
| uint32_t v; |
| v = dp8393x_readw(opaque, addr); |
| v |= dp8393x_readw(opaque, addr + 2) << 16; |
| return v; |
| } |
| |
| static void dp8393x_writew(void *opaque, hwaddr addr, uint32_t val) |
| { |
| dp8393xState *s = opaque; |
| int reg; |
| |
| if ((addr & ((1 << s->it_shift) - 1)) != 0) { |
| return; |
| } |
| |
| reg = addr >> s->it_shift; |
| |
| write_register(s, reg, (uint16_t)val); |
| } |
| |
| static void dp8393x_writeb(void *opaque, hwaddr addr, uint32_t val) |
| { |
| uint16_t old_val = dp8393x_readw(opaque, addr & ~0x1); |
| |
| switch (addr & 3) { |
| case 0: |
| val = val | (old_val & 0xff00); |
| break; |
| case 1: |
| val = (val << 8) | (old_val & 0x00ff); |
| break; |
| } |
| dp8393x_writew(opaque, addr & ~0x1, val); |
| } |
| |
| static void dp8393x_writel(void *opaque, hwaddr addr, uint32_t val) |
| { |
| dp8393x_writew(opaque, addr, val & 0xffff); |
| dp8393x_writew(opaque, addr + 2, (val >> 16) & 0xffff); |
| } |
| |
| static const MemoryRegionOps dp8393x_ops = { |
| .old_mmio = { |
| .read = { dp8393x_readb, dp8393x_readw, dp8393x_readl, }, |
| .write = { dp8393x_writeb, dp8393x_writew, dp8393x_writel, }, |
| }, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static int nic_can_receive(NetClientState *nc) |
| { |
| dp8393xState *s = DO_UPCAST(NICState, nc, nc)->opaque; |
| |
| if (!(s->regs[SONIC_CR] & SONIC_CR_RXEN)) |
| return 0; |
| if (s->regs[SONIC_ISR] & SONIC_ISR_RBE) |
| return 0; |
| return 1; |
| } |
| |
| static int receive_filter(dp8393xState *s, const uint8_t * buf, int size) |
| { |
| static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
| int i; |
| |
| /* Check for runt packet (remember that checksum is not there) */ |
| if (size < 64 - 4) { |
| return (s->regs[SONIC_RCR] & SONIC_RCR_RNT) ? 0 : -1; |
| } |
| |
| /* Check promiscuous mode */ |
| if ((s->regs[SONIC_RCR] & SONIC_RCR_PRO) && (buf[0] & 1) == 0) { |
| return 0; |
| } |
| |
| /* Check multicast packets */ |
| if ((s->regs[SONIC_RCR] & SONIC_RCR_AMC) && (buf[0] & 1) == 1) { |
| return SONIC_RCR_MC; |
| } |
| |
| /* Check broadcast */ |
| if ((s->regs[SONIC_RCR] & SONIC_RCR_BRD) && !memcmp(buf, bcast, sizeof(bcast))) { |
| return SONIC_RCR_BC; |
| } |
| |
| /* Check CAM */ |
| for (i = 0; i < 16; i++) { |
| if (s->regs[SONIC_CE] & (1 << i)) { |
| /* Entry enabled */ |
| if (!memcmp(buf, s->cam[i], sizeof(s->cam[i]))) { |
| return 0; |
| } |
| } |
| } |
| |
| return -1; |
| } |
| |
| static ssize_t nic_receive(NetClientState *nc, const uint8_t * buf, size_t size) |
| { |
| dp8393xState *s = DO_UPCAST(NICState, nc, nc)->opaque; |
| uint16_t data[10]; |
| int packet_type; |
| uint32_t available, address; |
| int width, rx_len = size; |
| uint32_t checksum; |
| |
| width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
| |
| s->regs[SONIC_RCR] &= ~(SONIC_RCR_PRX | SONIC_RCR_LBK | SONIC_RCR_FAER | |
| SONIC_RCR_CRCR | SONIC_RCR_LPKT | SONIC_RCR_BC | SONIC_RCR_MC); |
| |
| packet_type = receive_filter(s, buf, size); |
| if (packet_type < 0) { |
| DPRINTF("packet not for netcard\n"); |
| return -1; |
| } |
| |
| /* XXX: Check byte ordering */ |
| |
| /* Check for EOL */ |
| if (s->regs[SONIC_LLFA] & 0x1) { |
| /* Are we still in resource exhaustion? */ |
| size = sizeof(uint16_t) * 1 * width; |
| address = ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 5 * width; |
| s->memory_rw(s->mem_opaque, address, (uint8_t*)data, size, 0); |
| if (data[0 * width] & 0x1) { |
| /* Still EOL ; stop reception */ |
| return -1; |
| } else { |
| s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; |
| } |
| } |
| |
| /* Save current position */ |
| s->regs[SONIC_TRBA1] = s->regs[SONIC_CRBA1]; |
| s->regs[SONIC_TRBA0] = s->regs[SONIC_CRBA0]; |
| |
| /* Calculate the ethernet checksum */ |
| #ifdef SONIC_CALCULATE_RXCRC |
| checksum = cpu_to_le32(crc32(0, buf, rx_len)); |
| #else |
| checksum = 0; |
| #endif |
| |
| /* Put packet into RBA */ |
| DPRINTF("Receive packet at %08x\n", (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0]); |
| address = (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0]; |
| s->memory_rw(s->mem_opaque, address, (uint8_t*)buf, rx_len, 1); |
| address += rx_len; |
| s->memory_rw(s->mem_opaque, address, (uint8_t*)&checksum, 4, 1); |
| rx_len += 4; |
| s->regs[SONIC_CRBA1] = address >> 16; |
| s->regs[SONIC_CRBA0] = address & 0xffff; |
| available = (s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0]; |
| available -= rx_len / 2; |
| s->regs[SONIC_RBWC1] = available >> 16; |
| s->regs[SONIC_RBWC0] = available & 0xffff; |
| |
| /* Update status */ |
| if (((s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0]) < s->regs[SONIC_EOBC]) { |
| s->regs[SONIC_RCR] |= SONIC_RCR_LPKT; |
| } |
| s->regs[SONIC_RCR] |= packet_type; |
| s->regs[SONIC_RCR] |= SONIC_RCR_PRX; |
| if (s->loopback_packet) { |
| s->regs[SONIC_RCR] |= SONIC_RCR_LBK; |
| s->loopback_packet = 0; |
| } |
| |
| /* Write status to memory */ |
| DPRINTF("Write status at %08x\n", (s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]); |
| data[0 * width] = s->regs[SONIC_RCR]; /* status */ |
| data[1 * width] = rx_len; /* byte count */ |
| data[2 * width] = s->regs[SONIC_TRBA0]; /* pkt_ptr0 */ |
| data[3 * width] = s->regs[SONIC_TRBA1]; /* pkt_ptr1 */ |
| data[4 * width] = s->regs[SONIC_RSC]; /* seq_no */ |
| size = sizeof(uint16_t) * 5 * width; |
| s->memory_rw(s->mem_opaque, (s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA], (uint8_t *)data, size, 1); |
| |
| /* Move to next descriptor */ |
| size = sizeof(uint16_t) * width; |
| s->memory_rw(s->mem_opaque, |
| ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 5 * width, |
| (uint8_t *)data, size, 0); |
| s->regs[SONIC_LLFA] = data[0 * width]; |
| if (s->regs[SONIC_LLFA] & 0x1) { |
| /* EOL detected */ |
| s->regs[SONIC_ISR] |= SONIC_ISR_RDE; |
| } else { |
| data[0 * width] = 0; /* in_use */ |
| s->memory_rw(s->mem_opaque, |
| ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 6 * width, |
| (uint8_t *)data, size, 1); |
| s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; |
| s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX; |
| s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) | (((s->regs[SONIC_RSC] & 0x00ff) + 1) & 0x00ff); |
| |
| if (s->regs[SONIC_RCR] & SONIC_RCR_LPKT) { |
| /* Read next RRA */ |
| do_read_rra(s); |
| } |
| } |
| |
| /* Done */ |
| dp8393x_update_irq(s); |
| |
| return size; |
| } |
| |
| static void nic_reset(void *opaque) |
| { |
| dp8393xState *s = opaque; |
| qemu_del_timer(s->watchdog); |
| |
| s->regs[SONIC_CR] = SONIC_CR_RST | SONIC_CR_STP | SONIC_CR_RXDIS; |
| s->regs[SONIC_DCR] &= ~(SONIC_DCR_EXBUS | SONIC_DCR_LBR); |
| s->regs[SONIC_RCR] &= ~(SONIC_RCR_LB0 | SONIC_RCR_LB1 | SONIC_RCR_BRD | SONIC_RCR_RNT); |
| s->regs[SONIC_TCR] |= SONIC_TCR_NCRS | SONIC_TCR_PTX; |
| s->regs[SONIC_TCR] &= ~SONIC_TCR_BCM; |
| s->regs[SONIC_IMR] = 0; |
| s->regs[SONIC_ISR] = 0; |
| s->regs[SONIC_DCR2] = 0; |
| s->regs[SONIC_EOBC] = 0x02F8; |
| s->regs[SONIC_RSC] = 0; |
| s->regs[SONIC_CE] = 0; |
| s->regs[SONIC_RSC] = 0; |
| |
| /* Network cable is connected */ |
| s->regs[SONIC_RCR] |= SONIC_RCR_CRS; |
| |
| dp8393x_update_irq(s); |
| } |
| |
| static void nic_cleanup(NetClientState *nc) |
| { |
| dp8393xState *s = DO_UPCAST(NICState, nc, nc)->opaque; |
| |
| memory_region_del_subregion(s->address_space, &s->mmio); |
| memory_region_destroy(&s->mmio); |
| |
| qemu_del_timer(s->watchdog); |
| qemu_free_timer(s->watchdog); |
| |
| g_free(s); |
| } |
| |
| static NetClientInfo net_dp83932_info = { |
| .type = NET_CLIENT_OPTIONS_KIND_NIC, |
| .size = sizeof(NICState), |
| .can_receive = nic_can_receive, |
| .receive = nic_receive, |
| .cleanup = nic_cleanup, |
| }; |
| |
| void dp83932_init(NICInfo *nd, hwaddr base, int it_shift, |
| MemoryRegion *address_space, |
| qemu_irq irq, void* mem_opaque, |
| void (*memory_rw)(void *opaque, hwaddr addr, uint8_t *buf, int len, int is_write)) |
| { |
| dp8393xState *s; |
| |
| qemu_check_nic_model(nd, "dp83932"); |
| |
| s = g_malloc0(sizeof(dp8393xState)); |
| |
| s->address_space = address_space; |
| s->mem_opaque = mem_opaque; |
| s->memory_rw = memory_rw; |
| s->it_shift = it_shift; |
| s->irq = irq; |
| s->watchdog = qemu_new_timer_ns(vm_clock, dp8393x_watchdog, s); |
| s->regs[SONIC_SR] = 0x0004; /* only revision recognized by Linux */ |
| |
| s->conf.macaddr = nd->macaddr; |
| s->conf.peer = nd->netdev; |
| |
| s->nic = qemu_new_nic(&net_dp83932_info, &s->conf, nd->model, nd->name, s); |
| |
| qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a); |
| qemu_register_reset(nic_reset, s); |
| nic_reset(s); |
| |
| memory_region_init_io(&s->mmio, &dp8393x_ops, s, |
| "dp8393x", 0x40 << it_shift); |
| memory_region_add_subregion(address_space, base, &s->mmio); |
| } |
