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/sysbus.h" 17 #include "sysemu/sysemu.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/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 }; 90 91 static NetClientInfo net_lasi_82596_info = { 92 .type = NET_CLIENT_DRIVER_NIC, 93 .size = sizeof(NICState), 94 .can_receive = i82596_can_receive, 95 .receive = i82596_receive, 96 .link_status_changed = i82596_set_link_status, 97 }; 98 99 static const VMStateDescription vmstate_lasi_82596 = { 100 .name = "i82596", 101 .version_id = 1, 102 .minimum_version_id = 1, 103 .fields = (const VMStateField[]) { 104 VMSTATE_STRUCT(state, SysBusI82596State, 0, vmstate_i82596, 105 I82596State), 106 VMSTATE_END_OF_LIST() 107 } 108 }; 109 110 static void lasi_82596_realize(DeviceState *dev, Error **errp) 111 { 112 SysBusI82596State *d = SYSBUS_I82596(dev); 113 I82596State *s = &d->state; 114 115 memory_region_init_io(&s->mmio, OBJECT(d), &lasi_82596_mem_ops, d, 116 "lasi_82596-mmio", PA_GET_MACADDR + 4); 117 118 i82596_common_init(dev, s, &net_lasi_82596_info); 119 } 120 121 SysBusI82596State *lasi_82596_init(MemoryRegion *addr_space, hwaddr hpa, 122 qemu_irq lan_irq, gboolean match_default) 123 { 124 DeviceState *dev; 125 SysBusI82596State *s; 126 static const MACAddr HP_MAC = { 127 .a = { 0x08, 0x00, 0x09, 0xef, 0x34, 0xf6 } }; 128 129 dev = qemu_create_nic_device(TYPE_LASI_82596, match_default, "lasi"); 130 if (!dev) { 131 return NULL; 132 } 133 134 s = SYSBUS_I82596(dev); 135 s->state.irq = lan_irq; 136 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); 137 s->state.conf.macaddr = HP_MAC; /* set HP MAC prefix */ 138 139 /* LASI 82596 ports in main memory. */ 140 memory_region_add_subregion(addr_space, hpa, &s->state.mmio); 141 return s; 142 } 143 144 static void lasi_82596_reset(DeviceState *dev) 145 { 146 SysBusI82596State *d = SYSBUS_I82596(dev); 147 148 i82596_h_reset(&d->state); 149 } 150 151 static void lasi_82596_instance_init(Object *obj) 152 { 153 SysBusI82596State *d = SYSBUS_I82596(obj); 154 I82596State *s = &d->state; 155 156 device_add_bootindex_property(obj, &s->conf.bootindex, 157 "bootindex", "/ethernet-phy@0", 158 DEVICE(obj)); 159 } 160 161 static Property lasi_82596_properties[] = { 162 DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf), 163 DEFINE_PROP_END_OF_LIST(), 164 }; 165 166 static void lasi_82596_class_init(ObjectClass *klass, void *data) 167 { 168 DeviceClass *dc = DEVICE_CLASS(klass); 169 170 dc->realize = lasi_82596_realize; 171 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 172 dc->fw_name = "ethernet"; 173 device_class_set_legacy_reset(dc, lasi_82596_reset); 174 dc->vmsd = &vmstate_lasi_82596; 175 dc->user_creatable = false; 176 device_class_set_props(dc, lasi_82596_properties); 177 } 178 179 static const TypeInfo lasi_82596_info = { 180 .name = TYPE_LASI_82596, 181 .parent = TYPE_SYS_BUS_DEVICE, 182 .instance_size = sizeof(SysBusI82596State), 183 .class_init = lasi_82596_class_init, 184 .instance_init = lasi_82596_instance_init, 185 }; 186 187 static void lasi_82596_register_types(void) 188 { 189 type_register_static(&lasi_82596_info); 190 } 191 192 type_init(lasi_82596_register_types) 193