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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"
3e80f690 14#include "qapi/error.h"
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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 "sysemu/sysemu.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
32static 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 */
19f70347
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59 address_space_write(&address_space_memory, val,
60 MEMTXATTRS_UNSPECIFIED, d->state.conf.macaddr.a,
61 ETH_ALEN);
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62 break;
63 }
64}
65
66static 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
81static 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
91static 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
99static const VMStateDescription vmstate_lasi_82596 = {
100 .name = "i82596",
101 .version_id = 1,
102 .minimum_version_id = 1,
103 .fields = (VMStateField[]) {
104 VMSTATE_STRUCT(state, SysBusI82596State, 0, vmstate_i82596,
105 I82596State),
106 VMSTATE_END_OF_LIST()
107 }
108};
109
110static 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
121SysBusI82596State *lasi_82596_init(MemoryRegion *addr_space,
122 hwaddr hpa, qemu_irq lan_irq)
123{
124 DeviceState *dev;
125 SysBusI82596State *s;
126 static const MACAddr HP_MAC = {
127 .a = { 0x08, 0x00, 0x09, 0xef, 0x34, 0xf6 } };
128
129 qemu_check_nic_model(&nd_table[0], TYPE_LASI_82596);
3e80f690 130 dev = qdev_new(TYPE_LASI_82596);
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131 s = SYSBUS_I82596(dev);
132 s->state.irq = lan_irq;
133 qdev_set_nic_properties(dev, &nd_table[0]);
3e80f690 134 qdev_realize_and_unref(dev, NULL, &error_fatal);
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135 s->state.conf.macaddr = HP_MAC; /* set HP MAC prefix */
136
137 /* LASI 82596 ports in main memory. */
138 memory_region_add_subregion(addr_space, hpa, &s->state.mmio);
139 return s;
140}
141
142static void lasi_82596_reset(DeviceState *dev)
143{
144 SysBusI82596State *d = SYSBUS_I82596(dev);
145
146 i82596_h_reset(&d->state);
147}
148
149static void lasi_82596_instance_init(Object *obj)
150{
151 SysBusI82596State *d = SYSBUS_I82596(obj);
152 I82596State *s = &d->state;
153
154 device_add_bootindex_property(obj, &s->conf.bootindex,
155 "bootindex", "/ethernet-phy@0",
40c2281c 156 DEVICE(obj));
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157}
158
159static Property lasi_82596_properties[] = {
160 DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf),
161 DEFINE_PROP_END_OF_LIST(),
162};
163
164static void lasi_82596_class_init(ObjectClass *klass, void *data)
165{
166 DeviceClass *dc = DEVICE_CLASS(klass);
167
168 dc->realize = lasi_82596_realize;
169 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
170 dc->fw_name = "ethernet";
171 dc->reset = lasi_82596_reset;
172 dc->vmsd = &vmstate_lasi_82596;
173 dc->user_creatable = false;
174 device_class_set_props(dc, lasi_82596_properties);
175}
176
177static const TypeInfo lasi_82596_info = {
178 .name = TYPE_LASI_82596,
179 .parent = TYPE_SYS_BUS_DEVICE,
180 .instance_size = sizeof(SysBusI82596State),
181 .class_init = lasi_82596_class_init,
182 .instance_init = lasi_82596_instance_init,
183};
184
185static void lasi_82596_register_types(void)
186{
187 type_register_static(&lasi_82596_info);
188}
189
190type_init(lasi_82596_register_types)