| /* |
| * 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 "qemu/osdep.h" |
| #include "hw/irq.h" |
| #include "hw/qdev-properties.h" |
| #include "hw/net/dp8393x.h" |
| #include "hw/sysbus.h" |
| #include "migration/vmstate.h" |
| #include "net/net.h" |
| #include "qapi/error.h" |
| #include "qemu/module.h" |
| #include "qemu/timer.h" |
| #include <zlib.h> /* for crc32 */ |
| #include "qom/object.h" |
| #include "trace.h" |
| |
| 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" }; |
| |
| #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_RBAE 0x0010 |
| #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 |
| |
| #define SONIC_DESC_EOL 0x0001 |
| #define SONIC_DESC_ADDR 0xFFFE |
| |
| |
| /* |
| * Accessor functions for values which are formed by |
| * concatenating two 16 bit device registers. By putting these |
| * in their own functions with a uint32_t return type we avoid the |
| * pitfall of implicit sign extension where ((x << 16) | y) is a |
| * signed 32 bit integer that might get sign-extended to a 64 bit integer. |
| */ |
| static uint32_t dp8393x_cdp(dp8393xState *s) |
| { |
| return (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP]; |
| } |
| |
| static uint32_t dp8393x_crba(dp8393xState *s) |
| { |
| return (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0]; |
| } |
| |
| static uint32_t dp8393x_crda(dp8393xState *s) |
| { |
| return (s->regs[SONIC_URDA] << 16) | |
| (s->regs[SONIC_CRDA] & SONIC_DESC_ADDR); |
| } |
| |
| static uint32_t dp8393x_rbwc(dp8393xState *s) |
| { |
| return (s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0]; |
| } |
| |
| static uint32_t dp8393x_rrp(dp8393xState *s) |
| { |
| return (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_RRP]; |
| } |
| |
| static uint32_t dp8393x_tsa(dp8393xState *s) |
| { |
| return (s->regs[SONIC_TSA1] << 16) | s->regs[SONIC_TSA0]; |
| } |
| |
| static uint32_t dp8393x_ttda(dp8393xState *s) |
| { |
| return (s->regs[SONIC_UTDA] << 16) | |
| (s->regs[SONIC_TTDA] & SONIC_DESC_ADDR); |
| } |
| |
| static uint32_t dp8393x_wt(dp8393xState *s) |
| { |
| return s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0]; |
| } |
| |
| static uint16_t dp8393x_get(dp8393xState *s, hwaddr addr, int offset) |
| { |
| const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED; |
| uint16_t val; |
| |
| if (s->regs[SONIC_DCR] & SONIC_DCR_DW) { |
| addr += offset << 2; |
| if (s->big_endian) { |
| val = address_space_ldl_be(&s->as, addr, attrs, NULL); |
| } else { |
| val = address_space_ldl_le(&s->as, addr, attrs, NULL); |
| } |
| } else { |
| addr += offset << 1; |
| if (s->big_endian) { |
| val = address_space_lduw_be(&s->as, addr, attrs, NULL); |
| } else { |
| val = address_space_lduw_le(&s->as, addr, attrs, NULL); |
| } |
| } |
| |
| return val; |
| } |
| |
| static void dp8393x_put(dp8393xState *s, |
| hwaddr addr, int offset, uint16_t val) |
| { |
| const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED; |
| |
| if (s->regs[SONIC_DCR] & SONIC_DCR_DW) { |
| addr += offset << 2; |
| if (s->big_endian) { |
| address_space_stl_be(&s->as, addr, val, attrs, NULL); |
| } else { |
| address_space_stl_le(&s->as, addr, val, attrs, NULL); |
| } |
| } else { |
| addr += offset << 1; |
| if (s->big_endian) { |
| address_space_stw_be(&s->as, addr, val, attrs, NULL); |
| } else { |
| address_space_stw_le(&s->as, addr, val, attrs, NULL); |
| } |
| } |
| } |
| |
| static void dp8393x_update_irq(dp8393xState *s) |
| { |
| int level = (s->regs[SONIC_IMR] & s->regs[SONIC_ISR]) ? 1 : 0; |
| |
| if (level != s->irq_level) { |
| s->irq_level = level; |
| if (level) { |
| trace_dp8393x_raise_irq(s->regs[SONIC_ISR]); |
| } else { |
| trace_dp8393x_lower_irq(); |
| } |
| } |
| |
| qemu_set_irq(s->irq, level); |
| } |
| |
| static void dp8393x_do_load_cam(dp8393xState *s) |
| { |
| int width, size; |
| uint16_t index; |
| |
| 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 */ |
| index = dp8393x_get(s, dp8393x_cdp(s), 0) & 0xf; |
| s->cam[index][0] = dp8393x_get(s, dp8393x_cdp(s), 1); |
| s->cam[index][1] = dp8393x_get(s, dp8393x_cdp(s), 2); |
| s->cam[index][2] = dp8393x_get(s, dp8393x_cdp(s), 3); |
| trace_dp8393x_load_cam(index, |
| s->cam[index][0] >> 8, s->cam[index][0] & 0xff, |
| s->cam[index][1] >> 8, s->cam[index][1] & 0xff, |
| s->cam[index][2] >> 8, s->cam[index][2] & 0xff); |
| /* Move to next entry */ |
| s->regs[SONIC_CDC]--; |
| s->regs[SONIC_CDP] += size; |
| } |
| |
| /* Read CAM enable */ |
| s->regs[SONIC_CE] = dp8393x_get(s, dp8393x_cdp(s), 0); |
| trace_dp8393x_load_cam_done(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 dp8393x_do_read_rra(dp8393xState *s) |
| { |
| int width, size; |
| |
| /* Read memory */ |
| width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
| size = sizeof(uint16_t) * 4 * width; |
| |
| /* Update SONIC registers */ |
| s->regs[SONIC_CRBA0] = dp8393x_get(s, dp8393x_rrp(s), 0); |
| s->regs[SONIC_CRBA1] = dp8393x_get(s, dp8393x_rrp(s), 1); |
| s->regs[SONIC_RBWC0] = dp8393x_get(s, dp8393x_rrp(s), 2); |
| s->regs[SONIC_RBWC1] = dp8393x_get(s, dp8393x_rrp(s), 3); |
| trace_dp8393x_read_rra_regs(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]; |
| } |
| |
| /* Warn the host if CRBA now has the last available resource */ |
| if (s->regs[SONIC_RRP] == s->regs[SONIC_RWP]) { |
| s->regs[SONIC_ISR] |= SONIC_ISR_RBE; |
| dp8393x_update_irq(s); |
| } |
| |
| /* Allow packet reception */ |
| s->last_rba_is_full = false; |
| } |
| |
| static void dp8393x_do_software_reset(dp8393xState *s) |
| { |
| timer_del(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 dp8393x_set_next_tick(dp8393xState *s) |
| { |
| uint32_t ticks; |
| int64_t delay; |
| |
| if (s->regs[SONIC_CR] & SONIC_CR_STP) { |
| timer_del(s->watchdog); |
| return; |
| } |
| |
| ticks = dp8393x_wt(s); |
| s->wt_last_update = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| delay = NANOSECONDS_PER_SECOND * ticks / 5000000; |
| timer_mod(s->watchdog, s->wt_last_update + delay); |
| } |
| |
| static void dp8393x_update_wt_regs(dp8393xState *s) |
| { |
| int64_t elapsed; |
| uint32_t val; |
| |
| if (s->regs[SONIC_CR] & SONIC_CR_STP) { |
| timer_del(s->watchdog); |
| return; |
| } |
| |
| elapsed = s->wt_last_update - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| val = dp8393x_wt(s); |
| val -= elapsed / 5000000; |
| s->regs[SONIC_WT1] = (val >> 16) & 0xffff; |
| s->regs[SONIC_WT0] = (val >> 0) & 0xffff; |
| dp8393x_set_next_tick(s); |
| |
| } |
| |
| static void dp8393x_do_start_timer(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_STP; |
| dp8393x_set_next_tick(s); |
| } |
| |
| static void dp8393x_do_stop_timer(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_ST; |
| dp8393x_update_wt_regs(s); |
| } |
| |
| static bool dp8393x_can_receive(NetClientState *nc); |
| |
| static void dp8393x_do_receiver_enable(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_RXDIS; |
| if (dp8393x_can_receive(s->nic->ncs)) { |
| qemu_flush_queued_packets(qemu_get_queue(s->nic)); |
| } |
| } |
| |
| static void dp8393x_do_receiver_disable(dp8393xState *s) |
| { |
| s->regs[SONIC_CR] &= ~SONIC_CR_RXEN; |
| } |
| |
| static void dp8393x_do_transmit_packets(dp8393xState *s) |
| { |
| NetClientState *nc = qemu_get_queue(s->nic); |
| int tx_len, len; |
| uint16_t i; |
| |
| while (1) { |
| /* Read memory */ |
| s->regs[SONIC_TTDA] = s->regs[SONIC_CTDA]; |
| trace_dp8393x_transmit_packet(dp8393x_ttda(s)); |
| tx_len = 0; |
| |
| /* Update registers */ |
| s->regs[SONIC_TCR] = dp8393x_get(s, dp8393x_ttda(s), 1) & 0xf000; |
| s->regs[SONIC_TPS] = dp8393x_get(s, dp8393x_ttda(s), 2); |
| s->regs[SONIC_TFC] = dp8393x_get(s, dp8393x_ttda(s), 3); |
| s->regs[SONIC_TSA0] = dp8393x_get(s, dp8393x_ttda(s), 4); |
| s->regs[SONIC_TSA1] = dp8393x_get(s, dp8393x_ttda(s), 5); |
| s->regs[SONIC_TFS] = dp8393x_get(s, dp8393x_ttda(s), 6); |
| |
| /* 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; |
| } |
| address_space_read(&s->as, dp8393x_tsa(s), MEMTXATTRS_UNSPECIFIED, |
| &s->tx_buffer[tx_len], len); |
| tx_len += len; |
| |
| i++; |
| if (i != s->regs[SONIC_TFC]) { |
| /* Read next fragment details */ |
| s->regs[SONIC_TSA0] = dp8393x_get(s, dp8393x_ttda(s), |
| 4 + 3 * i); |
| s->regs[SONIC_TSA1] = dp8393x_get(s, dp8393x_ttda(s), |
| 5 + 3 * i); |
| s->regs[SONIC_TFS] = dp8393x_get(s, dp8393x_ttda(s), |
| 6 + 3 * i); |
| } |
| } |
| |
| /* 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 (tx_len < 0) { |
| trace_dp8393x_transmit_txlen_error(tx_len); |
| break; |
| } |
| } |
| |
| if (s->regs[SONIC_RCR] & (SONIC_RCR_LB1 | SONIC_RCR_LB0)) { |
| /* Loopback */ |
| s->regs[SONIC_TCR] |= SONIC_TCR_CRSL; |
| if (nc->info->can_receive(nc)) { |
| s->loopback_packet = 1; |
| qemu_receive_packet(nc, s->tx_buffer, tx_len); |
| } |
| } else { |
| /* Transmit packet */ |
| qemu_send_packet(nc, s->tx_buffer, tx_len); |
| } |
| s->regs[SONIC_TCR] |= SONIC_TCR_PTX; |
| |
| /* Write status */ |
| dp8393x_put(s, dp8393x_ttda(s), 0, s->regs[SONIC_TCR] & 0x0fff); |
| |
| if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) { |
| /* Read footer of packet */ |
| s->regs[SONIC_CTDA] = dp8393x_get(s, dp8393x_ttda(s), |
| 4 + 3 * s->regs[SONIC_TFC]); |
| if (s->regs[SONIC_CTDA] & SONIC_DESC_EOL) { |
| /* EOL detected */ |
| break; |
| } |
| } |
| } |
| |
| /* Done */ |
| s->regs[SONIC_CR] &= ~SONIC_CR_TXP; |
| s->regs[SONIC_ISR] |= SONIC_ISR_TXDN; |
| dp8393x_update_irq(s); |
| } |
| |
| static void dp8393x_do_halt_transmission(dp8393xState *s) |
| { |
| /* Nothing to do */ |
| } |
| |
| static void dp8393x_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) { |
| dp8393x_do_halt_transmission(s); |
| } |
| if (command & SONIC_CR_TXP) { |
| dp8393x_do_transmit_packets(s); |
| } |
| if (command & SONIC_CR_RXDIS) { |
| dp8393x_do_receiver_disable(s); |
| } |
| if (command & SONIC_CR_RXEN) { |
| dp8393x_do_receiver_enable(s); |
| } |
| if (command & SONIC_CR_STP) { |
| dp8393x_do_stop_timer(s); |
| } |
| if (command & SONIC_CR_ST) { |
| dp8393x_do_start_timer(s); |
| } |
| if (command & SONIC_CR_RST) { |
| dp8393x_do_software_reset(s); |
| } |
| if (command & SONIC_CR_RRRA) { |
| dp8393x_do_read_rra(s); |
| s->regs[SONIC_CR] &= ~SONIC_CR_RRRA; |
| } |
| if (command & SONIC_CR_LCAM) { |
| dp8393x_do_load_cam(s); |
| } |
| } |
| |
| static uint64_t dp8393x_read(void *opaque, hwaddr addr, unsigned int size) |
| { |
| dp8393xState *s = opaque; |
| int reg = addr >> s->it_shift; |
| uint16_t val = 0; |
| |
| switch (reg) { |
| /* Update data before reading it */ |
| case SONIC_WT0: |
| case SONIC_WT1: |
| dp8393x_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][SONIC_CAP0 - reg]; |
| } |
| break; |
| /* All other registers have no special constraints */ |
| default: |
| val = s->regs[reg]; |
| } |
| |
| trace_dp8393x_read(reg, reg_names[reg], val, size); |
| |
| return val; |
| } |
| |
| static void dp8393x_write(void *opaque, hwaddr addr, uint64_t val, |
| unsigned int size) |
| { |
| dp8393xState *s = opaque; |
| int reg = addr >> s->it_shift; |
| |
| trace_dp8393x_write(reg, reg_names[reg], val, size); |
| |
| switch (reg) { |
| /* Command register */ |
| case SONIC_CR: |
| dp8393x_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: |
| trace_dp8393x_write_invalid(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 { |
| trace_dp8393x_write_invalid_dcr("DCR"); |
| } |
| break; |
| case SONIC_DCR2: |
| if (s->regs[SONIC_CR] & SONIC_CR_RST) { |
| s->regs[reg] = val & 0xf017; |
| } else { |
| trace_dp8393x_write_invalid_dcr("DCR2"); |
| } |
| 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) { |
| dp8393x_do_read_rra(s); |
| } |
| dp8393x_update_irq(s); |
| break; |
| /* The guest is required to store aligned pointers here */ |
| case SONIC_RSA: |
| case SONIC_REA: |
| case SONIC_RRP: |
| case SONIC_RWP: |
| if (s->regs[SONIC_DCR] & SONIC_DCR_DW) { |
| s->regs[reg] = val & 0xfffc; |
| } else { |
| 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) { |
| dp8393x_set_next_tick(s); |
| } |
| } |
| |
| /* |
| * Since .impl.max_access_size is effectively controlled by the it_shift |
| * property, leave it unspecified for now to allow the memory API to |
| * correctly zero extend the 16-bit register values to the access size up to and |
| * including it_shift. |
| */ |
| static const MemoryRegionOps dp8393x_ops = { |
| .read = dp8393x_read, |
| .write = dp8393x_write, |
| .impl.min_access_size = 2, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| 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; |
| dp8393x_set_next_tick(s); |
| |
| /* Signal underflow */ |
| s->regs[SONIC_ISR] |= SONIC_ISR_TC; |
| dp8393x_update_irq(s); |
| } |
| |
| static bool dp8393x_can_receive(NetClientState *nc) |
| { |
| dp8393xState *s = qemu_get_nic_opaque(nc); |
| |
| return !!(s->regs[SONIC_CR] & SONIC_CR_RXEN); |
| } |
| |
| static int dp8393x_receive_filter(dp8393xState *s, const uint8_t * buf, |
| int size) |
| { |
| static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
| int i; |
| |
| /* 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 dp8393x_receive(NetClientState *nc, const uint8_t * buf, |
| size_t pkt_size) |
| { |
| dp8393xState *s = qemu_get_nic_opaque(nc); |
| int packet_type; |
| uint32_t available, address; |
| int rx_len, padded_len; |
| uint32_t checksum; |
| int size; |
| |
| 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); |
| |
| if (s->last_rba_is_full) { |
| return pkt_size; |
| } |
| |
| rx_len = pkt_size + sizeof(checksum); |
| if (s->regs[SONIC_DCR] & SONIC_DCR_DW) { |
| padded_len = ((rx_len - 1) | 3) + 1; |
| } else { |
| padded_len = ((rx_len - 1) | 1) + 1; |
| } |
| |
| if (padded_len > dp8393x_rbwc(s) * 2) { |
| trace_dp8393x_receive_oversize(pkt_size); |
| s->regs[SONIC_ISR] |= SONIC_ISR_RBAE; |
| dp8393x_update_irq(s); |
| s->regs[SONIC_RCR] |= SONIC_RCR_LPKT; |
| goto done; |
| } |
| |
| packet_type = dp8393x_receive_filter(s, buf, pkt_size); |
| if (packet_type < 0) { |
| trace_dp8393x_receive_not_netcard(); |
| return -1; |
| } |
| |
| /* Check for EOL */ |
| if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) { |
| /* Are we still in resource exhaustion? */ |
| s->regs[SONIC_LLFA] = dp8393x_get(s, dp8393x_crda(s), 5); |
| if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) { |
| /* Still EOL ; stop reception */ |
| return -1; |
| } |
| /* Link has been updated by host */ |
| |
| /* Clear in_use */ |
| dp8393x_put(s, dp8393x_crda(s), 6, 0x0000); |
| |
| /* Move to next descriptor */ |
| s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; |
| s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX; |
| } |
| |
| /* Save current position */ |
| s->regs[SONIC_TRBA1] = s->regs[SONIC_CRBA1]; |
| s->regs[SONIC_TRBA0] = s->regs[SONIC_CRBA0]; |
| |
| /* Calculate the ethernet checksum */ |
| checksum = cpu_to_le32(crc32(0, buf, pkt_size)); |
| |
| /* Put packet into RBA */ |
| trace_dp8393x_receive_packet(dp8393x_crba(s)); |
| address = dp8393x_crba(s); |
| address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED, |
| buf, pkt_size); |
| address += pkt_size; |
| |
| /* Put frame checksum into RBA */ |
| address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED, |
| &checksum, sizeof(checksum)); |
| address += sizeof(checksum); |
| |
| /* Pad short packets to keep pointers aligned */ |
| if (rx_len < padded_len) { |
| size = padded_len - rx_len; |
| address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED, |
| "\xFF\xFF\xFF", size); |
| address += size; |
| } |
| |
| s->regs[SONIC_CRBA1] = address >> 16; |
| s->regs[SONIC_CRBA0] = address & 0xffff; |
| available = dp8393x_rbwc(s); |
| available -= padded_len >> 1; |
| s->regs[SONIC_RBWC1] = available >> 16; |
| s->regs[SONIC_RBWC0] = available & 0xffff; |
| |
| /* Update status */ |
| if (dp8393x_rbwc(s) < 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 */ |
| trace_dp8393x_receive_write_status(dp8393x_crda(s)); |
| dp8393x_put(s, dp8393x_crda(s), 0, s->regs[SONIC_RCR]); /* status */ |
| dp8393x_put(s, dp8393x_crda(s), 1, rx_len); /* byte count */ |
| dp8393x_put(s, dp8393x_crda(s), 2, s->regs[SONIC_TRBA0]); /* pkt_ptr0 */ |
| dp8393x_put(s, dp8393x_crda(s), 3, s->regs[SONIC_TRBA1]); /* pkt_ptr1 */ |
| dp8393x_put(s, dp8393x_crda(s), 4, s->regs[SONIC_RSC]); /* seq_no */ |
| |
| /* Check link field */ |
| s->regs[SONIC_LLFA] = dp8393x_get(s, dp8393x_crda(s), 5); |
| if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) { |
| /* EOL detected */ |
| s->regs[SONIC_ISR] |= SONIC_ISR_RDE; |
| } else { |
| /* Clear in_use */ |
| dp8393x_put(s, dp8393x_crda(s), 6, 0x0000); |
| |
| /* Move to next descriptor */ |
| s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; |
| s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX; |
| } |
| |
| dp8393x_update_irq(s); |
| |
| s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) | |
| ((s->regs[SONIC_RSC] + 1) & 0x00ff); |
| |
| done: |
| |
| if (s->regs[SONIC_RCR] & SONIC_RCR_LPKT) { |
| if (s->regs[SONIC_RRP] == s->regs[SONIC_RWP]) { |
| /* Stop packet reception */ |
| s->last_rba_is_full = true; |
| } else { |
| /* Read next resource */ |
| dp8393x_do_read_rra(s); |
| } |
| } |
| |
| return pkt_size; |
| } |
| |
| static void dp8393x_reset(DeviceState *dev) |
| { |
| dp8393xState *s = DP8393X(dev); |
| timer_del(s->watchdog); |
| |
| memset(s->regs, 0, sizeof(s->regs)); |
| s->regs[SONIC_SR] = 0x0004; /* only revision recognized by Linux/mips */ |
| 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 NetClientInfo net_dp83932_info = { |
| .type = NET_CLIENT_DRIVER_NIC, |
| .size = sizeof(NICState), |
| .can_receive = dp8393x_can_receive, |
| .receive = dp8393x_receive, |
| }; |
| |
| static void dp8393x_instance_init(Object *obj) |
| { |
| SysBusDevice *sbd = SYS_BUS_DEVICE(obj); |
| dp8393xState *s = DP8393X(obj); |
| |
| sysbus_init_mmio(sbd, &s->mmio); |
| sysbus_init_irq(sbd, &s->irq); |
| } |
| |
| static void dp8393x_realize(DeviceState *dev, Error **errp) |
| { |
| dp8393xState *s = DP8393X(dev); |
| |
| address_space_init(&s->as, s->dma_mr, "dp8393x"); |
| memory_region_init_io(&s->mmio, OBJECT(dev), &dp8393x_ops, s, |
| "dp8393x-regs", SONIC_REG_COUNT << s->it_shift); |
| |
| s->nic = qemu_new_nic(&net_dp83932_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); |
| |
| s->watchdog = timer_new_ns(QEMU_CLOCK_VIRTUAL, dp8393x_watchdog, s); |
| } |
| |
| static const VMStateDescription vmstate_dp8393x = { |
| .name = "dp8393x", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (const VMStateField []) { |
| VMSTATE_UINT16_2DARRAY(cam, dp8393xState, 16, 3), |
| VMSTATE_UINT16_ARRAY(regs, dp8393xState, SONIC_REG_COUNT), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const Property dp8393x_properties[] = { |
| DEFINE_NIC_PROPERTIES(dp8393xState, conf), |
| DEFINE_PROP_LINK("dma_mr", dp8393xState, dma_mr, |
| TYPE_MEMORY_REGION, MemoryRegion *), |
| DEFINE_PROP_UINT8("it_shift", dp8393xState, it_shift, 0), |
| DEFINE_PROP_BOOL("big_endian", dp8393xState, big_endian, false), |
| }; |
| |
| static void dp8393x_class_init(ObjectClass *klass, const void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); |
| dc->realize = dp8393x_realize; |
| device_class_set_legacy_reset(dc, dp8393x_reset); |
| dc->vmsd = &vmstate_dp8393x; |
| device_class_set_props(dc, dp8393x_properties); |
| } |
| |
| static const TypeInfo dp8393x_info = { |
| .name = TYPE_DP8393X, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(dp8393xState), |
| .instance_init = dp8393x_instance_init, |
| .class_init = dp8393x_class_init, |
| }; |
| |
| static void dp8393x_register_types(void) |
| { |
| type_register_static(&dp8393x_info); |
| } |
| |
| type_init(dp8393x_register_types) |
