| 1 | /* |
| 2 | * QEMU LASI NIC i82596 emulation |
| 3 | * |
| 4 | * Copyright (c) 2019 Helge Deller <deller@gmx.de> |
| 5 | * This work is licensed under the GNU GPL license version 2 or later. |
| 6 | * |
| 7 | * |
| 8 | * On PA-RISC, this is the Network part of LASI chip. |
| 9 | * See: |
| 10 | * https://parisc.wiki.kernel.org/images-parisc/7/79/Lasi_ers.pdf |
| 11 | */ |
| 12 | |
| 13 | #include "qemu/osdep.h" |
| 14 | #include "qapi/error.h" |
| 15 | #include "qemu/timer.h" |
| 16 | #include "hw/core/sysbus.h" |
| 17 | #include "system/system.h" |
| 18 | #include "net/eth.h" |
| 19 | #include "hw/net/lasi_82596.h" |
| 20 | #include "hw/net/i82596.h" |
| 21 | #include "trace.h" |
| 22 | #include "hw/core/qdev-properties.h" |
| 23 | #include "migration/vmstate.h" |
| 24 | |
| 25 | #define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/ |
| 26 | #define PA_CPU_PORT_L_ACCESS 4 |
| 27 | #define PA_CHANNEL_ATTENTION 8 |
| 28 | #define PA_GET_MACADDR 12 |
| 29 | |
| 30 | #define SWAP32(x) (((uint32_t)(x) << 16) | ((((uint32_t)(x))) >> 16)) |
| 31 | |
| 32 | static void lasi_82596_mem_write(void *opaque, hwaddr addr, |
| 33 | uint64_t val, unsigned size) |
| 34 | { |
| 35 | SysBusI82596State *d = opaque; |
| 36 | |
| 37 | trace_lasi_82596_mem_writew(addr, val); |
| 38 | switch (addr) { |
| 39 | case PA_I82596_RESET: |
| 40 | i82596_h_reset(&d->state); |
| 41 | break; |
| 42 | case PA_CPU_PORT_L_ACCESS: |
| 43 | d->val_index++; |
| 44 | if (d->val_index == 0) { |
| 45 | uint32_t v = d->last_val | (val << 16); |
| 46 | v = v & ~0xff; |
| 47 | i82596_ioport_writew(&d->state, d->last_val & 0xff, v); |
| 48 | } |
| 49 | d->last_val = val; |
| 50 | break; |
| 51 | case PA_CHANNEL_ATTENTION: |
| 52 | i82596_ioport_writew(&d->state, PORT_CA, val); |
| 53 | break; |
| 54 | case PA_GET_MACADDR: |
| 55 | /* |
| 56 | * Provided for SeaBIOS only. Write MAC of Network card to addr @val. |
| 57 | * Needed for the PDC_LAN_STATION_ID_READ PDC call. |
| 58 | */ |
| 59 | address_space_write(&address_space_memory, val, |
| 60 | MEMTXATTRS_UNSPECIFIED, d->state.conf.macaddr.a, |
| 61 | ETH_ALEN); |
| 62 | break; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | static uint64_t lasi_82596_mem_read(void *opaque, hwaddr addr, |
| 67 | unsigned size) |
| 68 | { |
| 69 | SysBusI82596State *d = opaque; |
| 70 | uint32_t val; |
| 71 | |
| 72 | if (addr == PA_GET_MACADDR) { |
| 73 | val = 0xBEEFBABE; |
| 74 | } else { |
| 75 | val = i82596_ioport_readw(&d->state, addr); |
| 76 | } |
| 77 | trace_lasi_82596_mem_readw(addr, val); |
| 78 | return val; |
| 79 | } |
| 80 | |
| 81 | static const MemoryRegionOps lasi_82596_mem_ops = { |
| 82 | .read = lasi_82596_mem_read, |
| 83 | .write = lasi_82596_mem_write, |
| 84 | .endianness = DEVICE_BIG_ENDIAN, |
| 85 | .valid = { |
| 86 | .min_access_size = 4, |
| 87 | .max_access_size = 4, |
| 88 | }, |
| 89 | .impl = { |
| 90 | .min_access_size = 4, |
| 91 | .max_access_size = 4, |
| 92 | }, |
| 93 | }; |
| 94 | |
| 95 | static NetClientInfo net_lasi_82596_info = { |
| 96 | .type = NET_CLIENT_DRIVER_NIC, |
| 97 | .size = sizeof(NICState), |
| 98 | .can_receive = i82596_can_receive, |
| 99 | .receive = i82596_receive, |
| 100 | .receive_iov = i82596_receive_iov, |
| 101 | .poll = i82596_poll, |
| 102 | .link_status_changed = i82596_set_link_status, |
| 103 | }; |
| 104 | |
| 105 | static const VMStateDescription vmstate_lasi_82596 = { |
| 106 | .name = "i82596", |
| 107 | .version_id = 1, |
| 108 | .minimum_version_id = 1, |
| 109 | .fields = (const VMStateField[]) { |
| 110 | VMSTATE_STRUCT(state, SysBusI82596State, 0, vmstate_i82596, |
| 111 | I82596State), |
| 112 | VMSTATE_END_OF_LIST() |
| 113 | } |
| 114 | }; |
| 115 | |
| 116 | static void lasi_82596_realize(DeviceState *dev, Error **errp) |
| 117 | { |
| 118 | SysBusI82596State *d = SYSBUS_I82596(dev); |
| 119 | I82596State *s = &d->state; |
| 120 | |
| 121 | memory_region_init_io(&s->mmio, OBJECT(d), &lasi_82596_mem_ops, d, |
| 122 | "lasi_82596-mmio", PA_GET_MACADDR + 4); |
| 123 | |
| 124 | sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq); |
| 125 | sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio); |
| 126 | |
| 127 | i82596_common_init(dev, s, &net_lasi_82596_info); |
| 128 | } |
| 129 | |
| 130 | static void lasi_82596_reset(DeviceState *dev) |
| 131 | { |
| 132 | SysBusI82596State *d = SYSBUS_I82596(dev); |
| 133 | |
| 134 | i82596_h_reset(&d->state); |
| 135 | } |
| 136 | |
| 137 | static void lasi_82596_instance_init(Object *obj) |
| 138 | { |
| 139 | SysBusI82596State *d = SYSBUS_I82596(obj); |
| 140 | I82596State *s = &d->state; |
| 141 | static const MACAddr HP_MAC = { |
| 142 | .a = { 0x08, 0x00, 0x09, 0xef, 0x34, 0xf6 } }; |
| 143 | |
| 144 | s->conf.macaddr = HP_MAC; |
| 145 | |
| 146 | device_add_bootindex_property(obj, &s->conf.bootindex, |
| 147 | "bootindex", "/ethernet-phy@0", |
| 148 | DEVICE(obj)); |
| 149 | } |
| 150 | |
| 151 | static const Property lasi_82596_properties[] = { |
| 152 | DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf), |
| 153 | }; |
| 154 | |
| 155 | static void lasi_82596_class_init(ObjectClass *klass, const void *data) |
| 156 | { |
| 157 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 158 | |
| 159 | dc->realize = lasi_82596_realize; |
| 160 | set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); |
| 161 | dc->fw_name = "ethernet"; |
| 162 | device_class_set_legacy_reset(dc, lasi_82596_reset); |
| 163 | dc->vmsd = &vmstate_lasi_82596; |
| 164 | dc->user_creatable = false; |
| 165 | device_class_set_props(dc, lasi_82596_properties); |
| 166 | } |
| 167 | |
| 168 | static const TypeInfo lasi_82596_info = { |
| 169 | .name = TYPE_LASI_82596, |
| 170 | .parent = TYPE_SYS_BUS_DEVICE, |
| 171 | .instance_size = sizeof(SysBusI82596State), |
| 172 | .class_init = lasi_82596_class_init, |
| 173 | .instance_init = lasi_82596_instance_init, |
| 174 | }; |
| 175 | |
| 176 | static void lasi_82596_register_types(void) |
| 177 | { |
| 178 | type_register_static(&lasi_82596_info); |
| 179 | } |
| 180 | |
| 181 | type_init(lasi_82596_register_types) |