qemu

lasi_i82596.c (5410B)

---

 /*
  * QEMU LASI NIC i82596 emulation
  *
  * Copyright (c) 2019 Helge Deller <deller@gmx.de>
  * This work is licensed under the GNU GPL license version 2 or later.
  *
  *
  * On PA-RISC, this is the Network part of LASI chip.
  * See:
  * https://parisc.wiki.kernel.org/images-parisc/7/79/Lasi_ers.pdf
  */
 
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/timer.h"
 #include "hw/sysbus.h"
 #include "net/eth.h"
 #include "hw/net/lasi_82596.h"
 #include "hw/net/i82596.h"
 #include "trace.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 
 #define PA_I82596_RESET         0       /* Offsets relative to LASI-LAN-Addr.*/
 #define PA_CPU_PORT_L_ACCESS    4
 #define PA_CHANNEL_ATTENTION    8
 #define PA_GET_MACADDR          12
 
 #define SWAP32(x)   (((uint32_t)(x) << 16) | ((((uint32_t)(x))) >> 16))
 
 static void lasi_82596_mem_write(void *opaque, hwaddr addr,
                             uint64_t val, unsigned size)
 {
     SysBusI82596State *d = opaque;
 
     trace_lasi_82596_mem_writew(addr, val);
     switch (addr) {
     case PA_I82596_RESET:
         i82596_h_reset(&d->state);
         break;
     case PA_CPU_PORT_L_ACCESS:
         d->val_index++;
         if (d->val_index == 0) {
             uint32_t v = d->last_val | (val << 16);
             v = v & ~0xff;
             i82596_ioport_writew(&d->state, d->last_val & 0xff, v);
         }
         d->last_val = val;
         break;
     case PA_CHANNEL_ATTENTION:
         i82596_ioport_writew(&d->state, PORT_CA, val);
         break;
     case PA_GET_MACADDR:
         /*
          * Provided for SeaBIOS only. Write MAC of Network card to addr @val.
          * Needed for the PDC_LAN_STATION_ID_READ PDC call.
          */
         address_space_write(&address_space_memory, val,
                             MEMTXATTRS_UNSPECIFIED, d->state.conf.macaddr.a,
                             ETH_ALEN);
         break;
     }
 }
 
 static uint64_t lasi_82596_mem_read(void *opaque, hwaddr addr,
                                unsigned size)
 {
     SysBusI82596State *d = opaque;
     uint32_t val;
 
     if (addr == PA_GET_MACADDR) {
         val = 0xBEEFBABE;
     } else {
         val = i82596_ioport_readw(&d->state, addr);
     }
     trace_lasi_82596_mem_readw(addr, val);
     return val;
 }
 
 static const MemoryRegionOps lasi_82596_mem_ops = {
     .read = lasi_82596_mem_read,
     .write = lasi_82596_mem_write,
     .endianness = DEVICE_BIG_ENDIAN,
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4,
     },
 };
 
 static NetClientInfo net_lasi_82596_info = {
     .type = NET_CLIENT_DRIVER_NIC,
     .size = sizeof(NICState),
     .can_receive = i82596_can_receive,
     .receive = i82596_receive,
     .link_status_changed = i82596_set_link_status,
 };
 
 static const VMStateDescription vmstate_lasi_82596 = {
     .name = "i82596",
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_STRUCT(state, SysBusI82596State, 0, vmstate_i82596,
                 I82596State),
         VMSTATE_END_OF_LIST()
     }
 };
 
 static void lasi_82596_realize(DeviceState *dev, Error **errp)
 {
     SysBusI82596State *d = SYSBUS_I82596(dev);
     I82596State *s = &d->state;
 
     memory_region_init_io(&s->mmio, OBJECT(d), &lasi_82596_mem_ops, d,
                 "lasi_82596-mmio", PA_GET_MACADDR + 4);
 
     i82596_common_init(dev, s, &net_lasi_82596_info);
 }
 
 SysBusI82596State *lasi_82596_init(MemoryRegion *addr_space,
                   hwaddr hpa, qemu_irq lan_irq)
 {
     DeviceState *dev;
     SysBusI82596State *s;
     static const MACAddr HP_MAC = {
         .a = { 0x08, 0x00, 0x09, 0xef, 0x34, 0xf6 } };
 
     qemu_check_nic_model(&nd_table[0], TYPE_LASI_82596);
     dev = qdev_new(TYPE_LASI_82596);
     s = SYSBUS_I82596(dev);
     s->state.irq = lan_irq;
     qdev_set_nic_properties(dev, &nd_table[0]);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     s->state.conf.macaddr = HP_MAC; /* set HP MAC prefix */
 
     /* LASI 82596 ports in main memory. */
     memory_region_add_subregion(addr_space, hpa, &s->state.mmio);
     return s;
 }
 
 static void lasi_82596_reset(DeviceState *dev)
 {
     SysBusI82596State *d = SYSBUS_I82596(dev);
 
     i82596_h_reset(&d->state);
 }
 
 static void lasi_82596_instance_init(Object *obj)
 {
     SysBusI82596State *d = SYSBUS_I82596(obj);
     I82596State *s = &d->state;
 
     device_add_bootindex_property(obj, &s->conf.bootindex,
                                   "bootindex", "/ethernet-phy@0",
                                   DEVICE(obj));
 }
 
 static Property lasi_82596_properties[] = {
     DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf),
     DEFINE_PROP_END_OF_LIST(),
 };
 
 static void lasi_82596_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = lasi_82596_realize;
     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
     dc->fw_name = "ethernet";
     dc->reset = lasi_82596_reset;
     dc->vmsd = &vmstate_lasi_82596;
     dc->user_creatable = false;
     device_class_set_props(dc, lasi_82596_properties);
 }
 
 static const TypeInfo lasi_82596_info = {
     .name          = TYPE_LASI_82596,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(SysBusI82596State),
     .class_init    = lasi_82596_class_init,
     .instance_init = lasi_82596_instance_init,
 };
 
 static void lasi_82596_register_types(void)
 {
     type_register_static(&lasi_82596_info);
 }
 
 type_init(lasi_82596_register_types)