hw/net/lasi_i82596.c

   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 "net/eth.h"
  18 #include "hw/net/lasi_82596.h"
  19 #include "hw/net/i82596.h"
  20 #include "trace.h"
  21 #include "hw/qdev-properties.h"
  22 #include "migration/vmstate.h"
  23
  24 #define PA_I82596_RESET         0       /* Offsets relative to LASI-LAN-Addr.*/
  25 #define PA_CPU_PORT_L_ACCESS    4
  26 #define PA_CHANNEL_ATTENTION    8
  27 #define PA_GET_MACADDR          12
  28
  29 #define SWAP32(x)   (((uint32_t)(x) << 16) | ((((uint32_t)(x))) >> 16))
  30
  31 static void lasi_82596_mem_write(void *opaque, hwaddr addr,
  32                             uint64_t val, unsigned size)
  33 {
  34     SysBusI82596State *d = opaque;
  35
  36     trace_lasi_82596_mem_writew(addr, val);
  37     switch (addr) {
  38     case PA_I82596_RESET:
  39         i82596_h_reset(&d->state);
  40         break;
  41     case PA_CPU_PORT_L_ACCESS:
  42         d->val_index++;
  43         if (d->val_index == 0) {
  44             uint32_t v = d->last_val | (val << 16);
  45             v = v & ~0xff;
  46             i82596_ioport_writew(&d->state, d->last_val & 0xff, v);
  47         }
  48         d->last_val = val;
  49         break;
  50     case PA_CHANNEL_ATTENTION:
  51         i82596_ioport_writew(&d->state, PORT_CA, val);
  52         break;
  53     case PA_GET_MACADDR:
  54         /*
  55          * Provided for SeaBIOS only. Write MAC of Network card to addr @val.
  56          * Needed for the PDC_LAN_STATION_ID_READ PDC call.
  57          */
  58         address_space_write(&address_space_memory, val,
  59                             MEMTXATTRS_UNSPECIFIED, d->state.conf.macaddr.a,
  60                             ETH_ALEN);
  61         break;
  62     }
  63 }
  64
  65 static uint64_t lasi_82596_mem_read(void *opaque, hwaddr addr,
  66                                unsigned size)
  67 {
  68     SysBusI82596State *d = opaque;
  69     uint32_t val;
  70
  71     if (addr == PA_GET_MACADDR) {
  72         val = 0xBEEFBABE;
  73     } else {
  74         val = i82596_ioport_readw(&d->state, addr);
  75     }
  76     trace_lasi_82596_mem_readw(addr, val);
  77     return val;
  78 }
  79
  80 static const MemoryRegionOps lasi_82596_mem_ops = {
  81     .read = lasi_82596_mem_read,
  82     .write = lasi_82596_mem_write,
  83     .endianness = DEVICE_BIG_ENDIAN,
  84     .valid = {
  85         .min_access_size = 4,
  86         .max_access_size = 4,
  87     },
  88 };
  89
  90 static NetClientInfo net_lasi_82596_info = {
  91     .type = NET_CLIENT_DRIVER_NIC,
  92     .size = sizeof(NICState),
  93     .can_receive = i82596_can_receive,
  94     .receive = i82596_receive,
  95     .link_status_changed = i82596_set_link_status,
  96 };
  97
  98 static const VMStateDescription vmstate_lasi_82596 = {
  99     .name = "i82596",
 100     .version_id = 1,
 101     .minimum_version_id = 1,
 102     .fields = (VMStateField[]) {
 103         VMSTATE_STRUCT(state, SysBusI82596State, 0, vmstate_i82596,
 104                 I82596State),
 105         VMSTATE_END_OF_LIST()
 106     }
 107 };
 108
 109 static void lasi_82596_realize(DeviceState *dev, Error **errp)
 110 {
 111     SysBusI82596State *d = SYSBUS_I82596(dev);
 112     I82596State *s = &d->state;
 113
 114     memory_region_init_io(&s->mmio, OBJECT(d), &lasi_82596_mem_ops, d,
 115                 "lasi_82596-mmio", PA_GET_MACADDR + 4);
 116
 117     i82596_common_init(dev, s, &net_lasi_82596_info);
 118 }
 119
 120 SysBusI82596State *lasi_82596_init(MemoryRegion *addr_space,
 121                   hwaddr hpa, qemu_irq lan_irq)
 122 {
 123     DeviceState *dev;
 124     SysBusI82596State *s;
 125     static const MACAddr HP_MAC = {
 126         .a = { 0x08, 0x00, 0x09, 0xef, 0x34, 0xf6 } };
 127
 128     qemu_check_nic_model(&nd_table[0], TYPE_LASI_82596);
 129     dev = qdev_new(TYPE_LASI_82596);
 130     s = SYSBUS_I82596(dev);
 131     s->state.irq = lan_irq;
 132     qdev_set_nic_properties(dev, &nd_table[0]);
 133     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 134     s->state.conf.macaddr = HP_MAC; /* set HP MAC prefix */
 135
 136     /* LASI 82596 ports in main memory. */
 137     memory_region_add_subregion(addr_space, hpa, &s->state.mmio);
 138     return s;
 139 }
 140
 141 static void lasi_82596_reset(DeviceState *dev)
 142 {
 143     SysBusI82596State *d = SYSBUS_I82596(dev);
 144
 145     i82596_h_reset(&d->state);
 146 }
 147
 148 static void lasi_82596_instance_init(Object *obj)
 149 {
 150     SysBusI82596State *d = SYSBUS_I82596(obj);
 151     I82596State *s = &d->state;
 152
 153     device_add_bootindex_property(obj, &s->conf.bootindex,
 154                                   "bootindex", "/ethernet-phy@0",
 155                                   DEVICE(obj));
 156 }
 157
 158 static Property lasi_82596_properties[] = {
 159     DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf),
 160     DEFINE_PROP_END_OF_LIST(),
 161 };
 162
 163 static void lasi_82596_class_init(ObjectClass *klass, void *data)
 164 {
 165     DeviceClass *dc = DEVICE_CLASS(klass);
 166
 167     dc->realize = lasi_82596_realize;
 168     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
 169     dc->fw_name = "ethernet";
 170     dc->reset = lasi_82596_reset;
 171     dc->vmsd = &vmstate_lasi_82596;
 172     dc->user_creatable = false;
 173     device_class_set_props(dc, lasi_82596_properties);
 174 }
 175
 176 static const TypeInfo lasi_82596_info = {
 177     .name          = TYPE_LASI_82596,
 178     .parent        = TYPE_SYS_BUS_DEVICE,
 179     .instance_size = sizeof(SysBusI82596State),
 180     .class_init    = lasi_82596_class_init,
 181     .instance_init = lasi_82596_instance_init,
 182 };
 183
 184 static void lasi_82596_register_types(void)
 185 {
 186     type_register_static(&lasi_82596_info);
 187 }
 188
 189 type_init(lasi_82596_register_types)