/* * QEMU Freescale eTSEC Emulator * * Copyright (c) 2011-2013 AdaCore * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* * This implementation doesn't include ring priority, TCP/IP Off-Load, QoS. */ #include "qemu/osdep.h" #include "hw/sysbus.h" #include "hw/irq.h" #include "hw/net/mii.h" #include "hw/ptimer.h" #include "hw/qdev-properties.h" #include "etsec.h" #include "registers.h" #include "qapi/error.h" #include "qemu/log.h" #include "qemu/module.h" /* #define HEX_DUMP */ /* #define DEBUG_REGISTER */ #ifdef DEBUG_REGISTER static const int debug_etsec = 1; #else static const int debug_etsec; #endif #define DPRINTF(fmt, ...) do { \ if (debug_etsec) { \ qemu_log(fmt , ## __VA_ARGS__); \ } \ } while (0) /* call after any change to IEVENT or IMASK */ void etsec_update_irq(eTSEC *etsec) { uint32_t ievent = etsec->regs[IEVENT].value; uint32_t imask = etsec->regs[IMASK].value; uint32_t active = ievent & imask; int tx = !!(active & IEVENT_TX_MASK); int rx = !!(active & IEVENT_RX_MASK); int err = !!(active & IEVENT_ERR_MASK); DPRINTF("%s IRQ ievent=%"PRIx32" imask=%"PRIx32" %c%c%c", __func__, ievent, imask, tx ? 'T' : '_', rx ? 'R' : '_', err ? 'E' : '_'); qemu_set_irq(etsec->tx_irq, tx); qemu_set_irq(etsec->rx_irq, rx); qemu_set_irq(etsec->err_irq, err); } static uint64_t etsec_read(void *opaque, hwaddr addr, unsigned size) { eTSEC *etsec = opaque; uint32_t reg_index = addr / 4; eTSEC_Register *reg = NULL; uint32_t ret = 0x0; assert(reg_index < ETSEC_REG_NUMBER); reg = &etsec->regs[reg_index]; switch (reg->access) { case ACC_WO: ret = 0x00000000; break; case ACC_RW: case ACC_W1C: case ACC_RO: default: ret = reg->value; break; } DPRINTF("Read 0x%08x @ 0x" HWADDR_FMT_plx " : %s (%s)\n", ret, addr, reg->name, reg->desc); return ret; } static void write_tstat(eTSEC *etsec, eTSEC_Register *reg, uint32_t reg_index, uint32_t value) { int i = 0; for (i = 0; i < 8; i++) { /* Check THLTi flag in TSTAT */ if (value & (1 << (31 - i))) { etsec_walk_tx_ring(etsec, i); } } /* Write 1 to clear */ reg->value &= ~value; } static void write_rstat(eTSEC *etsec, eTSEC_Register *reg, uint32_t reg_index, uint32_t value) { int i = 0; for (i = 0; i < 8; i++) { /* Check QHLTi flag in RSTAT */ if (value & (1 << (23 - i)) && !(reg->value & (1 << (23 - i)))) { etsec_walk_rx_ring(etsec, i); } } /* Write 1 to clear */ reg->value &= ~value; } static void write_tbasex(eTSEC *etsec, eTSEC_Register *reg, uint32_t reg_index, uint32_t value) { reg->value = value & ~0x7; /* Copy this value in the ring's TxBD pointer */ etsec->regs[TBPTR0 + (reg_index - TBASE0)].value = value & ~0x7; } static void write_rbasex(eTSEC *etsec, eTSEC_Register *reg, uint32_t reg_index, uint32_t value) { reg->value = value & ~0x7; /* Copy this value in the ring's RxBD pointer */ etsec->regs[RBPTR0 + (reg_index - RBASE0)].value = value & ~0x7; } static void write_dmactrl(eTSEC *etsec, eTSEC_Register *reg, uint32_t reg_index, uint32_t value) { reg->value = value; if (value & DMACTRL_GRS) { if (etsec->rx_buffer_len != 0) { /* Graceful receive stop delayed until end of frame */ } else { /* Graceful receive stop now */ etsec->regs[IEVENT].value |= IEVENT_GRSC; etsec_update_irq(etsec); } } if (value & DMACTRL_GTS) { if (etsec->tx_buffer_len != 0) { /* Graceful transmit stop delayed until end of frame */ } else { /* Graceful transmit stop now */ etsec->regs[IEVENT].value |= IEVENT_GTSC; etsec_update_irq(etsec); } } if (!(value & DMACTRL_WOP)) { /* Start polling */ ptimer_transaction_begin(etsec->ptimer); ptimer_stop(etsec->ptimer); ptimer_set_count(etsec->ptimer, 1); ptimer_run(etsec->ptimer, 1); ptimer_transaction_commit(etsec->ptimer); } } static void etsec_write(void *opaque, hwaddr addr, uint64_t value, unsigned size) { eTSEC *etsec = opaque; uint32_t reg_index = addr / 4; eTSEC_Register *reg = NULL; uint32_t before = 0x0; assert(reg_index < ETSEC_REG_NUMBER); reg = &etsec->regs[reg_index]; before = reg->value; switch (reg_index) { case IEVENT: /* Write 1 to clear */ reg->value &= ~value; etsec_update_irq(etsec); break; case IMASK: reg->value = value; etsec_update_irq(etsec); break; case DMACTRL: write_dmactrl(etsec, reg, reg_index, value); break; case TSTAT: write_tstat(etsec, reg, reg_index, value); break; case RSTAT: write_rstat(etsec, reg, reg_index, value); break; case TBASE0 ... TBASE7: write_tbasex(etsec, reg, reg_index, value); break; case RBASE0 ... RBASE7: write_rbasex(etsec, reg, reg_index, value); break; case MIIMCFG ... MIIMIND: etsec_write_miim(etsec, reg, reg_index, value); break; default: /* Default handling */ switch (reg->access) { case ACC_RW: case ACC_WO: reg->value = value; break; case ACC_W1C: reg->value &= ~value; break; case ACC_RO: default: /* Read Only or Unknown register */ break; } } DPRINTF("Write 0x%08x @ 0x" HWADDR_FMT_plx " val:0x%08x->0x%08x : %s (%s)\n", (unsigned int)value, addr, before, reg->value, reg->name, reg->desc); } static const MemoryRegionOps etsec_ops = { .read = etsec_read, .write = etsec_write, .endianness = DEVICE_NATIVE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void etsec_timer_hit(void *opaque) { eTSEC *etsec = opaque; ptimer_stop(etsec->ptimer); if (!(etsec->regs[DMACTRL].value & DMACTRL_WOP)) { if (!(etsec->regs[DMACTRL].value & DMACTRL_GTS)) { etsec_walk_tx_ring(etsec, 0); } ptimer_set_count(etsec->ptimer, 1); ptimer_run(etsec->ptimer, 1); } } static void etsec_reset(DeviceState *d) { eTSEC *etsec = ETSEC_COMMON(d); int i = 0; int reg_index = 0; /* Default value for all registers */ for (i = 0; i < ETSEC_REG_NUMBER; i++) { etsec->regs[i].name = "Reserved"; etsec->regs[i].desc = ""; etsec->regs[i].access = ACC_UNKNOWN; etsec->regs[i].value = 0x00000000; } /* Set-up known registers */ for (i = 0; eTSEC_registers_def[i].name != NULL; i++) { reg_index = eTSEC_registers_def[i].offset / 4; etsec->regs[reg_index].name = eTSEC_registers_def[i].name; etsec->regs[reg_index].desc = eTSEC_registers_def[i].desc; etsec->regs[reg_index].access = eTSEC_registers_def[i].access; etsec->regs[reg_index].value = eTSEC_registers_def[i].reset; } etsec->tx_buffer = NULL; etsec->tx_buffer_len = 0; etsec->rx_buffer = NULL; etsec->rx_buffer_len = 0; etsec->phy_status = MII_BMSR_EXTCAP | MII_BMSR_LINK_ST | MII_BMSR_AUTONEG | MII_BMSR_AN_COMP | MII_BMSR_MFPS | MII_BMSR_EXTSTAT | MII_BMSR_100T2_HD | MII_BMSR_100T2_FD | MII_BMSR_10T_HD | MII_BMSR_10T_FD | MII_BMSR_100TX_HD | MII_BMSR_100TX_FD | MII_BMSR_100T4; etsec_update_irq(etsec); } static ssize_t etsec_receive(NetClientState *nc, const uint8_t *buf, size_t size) { ssize_t ret; eTSEC *etsec = qemu_get_nic_opaque(nc); #if defined(HEX_DUMP) fprintf(stderr, "%s receive size:%zd\n", nc->name, size); qemu_hexdump(stderr, "", buf, size); #endif /* Flush is unnecessary as are already in receiving path */ etsec->need_flush = false; ret = etsec_rx_ring_write(etsec, buf, size); if (ret == 0) { /* The packet will be queued, let's flush it when buffer is available * again. */ etsec->need_flush = true; } return ret; } static void etsec_set_link_status(NetClientState *nc) { eTSEC *etsec = qemu_get_nic_opaque(nc); etsec_miim_link_status(etsec, nc); } static NetClientInfo net_etsec_info = { .type = NET_CLIENT_DRIVER_NIC, .size = sizeof(NICState), .receive = etsec_receive, .link_status_changed = etsec_set_link_status, }; static void etsec_realize(DeviceState *dev, Error **errp) { eTSEC *etsec = ETSEC_COMMON(dev); etsec->nic = qemu_new_nic(&net_etsec_info, &etsec->conf, object_get_typename(OBJECT(dev)), dev->id, &dev->mem_reentrancy_guard, etsec); qemu_format_nic_info_str(qemu_get_queue(etsec->nic), etsec->conf.macaddr.a); etsec->ptimer = ptimer_init(etsec_timer_hit, etsec, PTIMER_POLICY_LEGACY); ptimer_transaction_begin(etsec->ptimer); ptimer_set_freq(etsec->ptimer, 100); ptimer_transaction_commit(etsec->ptimer); } static void etsec_instance_init(Object *obj) { eTSEC *etsec = ETSEC_COMMON(obj); SysBusDevice *sbd = SYS_BUS_DEVICE(obj); memory_region_init_io(&etsec->io_area, OBJECT(etsec), &etsec_ops, etsec, "eTSEC", 0x1000); sysbus_init_mmio(sbd, &etsec->io_area); sysbus_init_irq(sbd, &etsec->tx_irq); sysbus_init_irq(sbd, &etsec->rx_irq); sysbus_init_irq(sbd, &etsec->err_irq); } static Property etsec_properties[] = { DEFINE_NIC_PROPERTIES(eTSEC, conf), DEFINE_PROP_END_OF_LIST(), }; static void etsec_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->realize = etsec_realize; device_class_set_legacy_reset(dc, etsec_reset); device_class_set_props(dc, etsec_properties); /* Supported by ppce500 machine */ dc->user_creatable = true; } static const TypeInfo etsec_info = { .name = TYPE_ETSEC_COMMON, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(eTSEC), .class_init = etsec_class_init, .instance_init = etsec_instance_init, }; static void etsec_register_types(void) { type_register_static(&etsec_info); } type_init(etsec_register_types)