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b43848a1 EI |
1 | /* |
2 | * QEMU model of the Xilinx Ethernet Lite MAC. | |
3 | * | |
4 | * Copyright (c) 2009 Edgar E. Iglesias. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
e8d40465 | 25 | #include "qemu/osdep.h" |
0b8fa32f | 26 | #include "qemu/module.h" |
db1015e9 | 27 | #include "qom/object.h" |
4771d756 | 28 | #include "cpu.h" /* FIXME should not use tswap* */ |
83c9f4ca | 29 | #include "hw/sysbus.h" |
64552b6b | 30 | #include "hw/irq.h" |
a27bd6c7 | 31 | #include "hw/qdev-properties.h" |
1422e32d | 32 | #include "net/net.h" |
b43848a1 EI |
33 | |
34 | #define D(x) | |
35 | #define R_TX_BUF0 0 | |
36 | #define R_TX_LEN0 (0x07f4 / 4) | |
37 | #define R_TX_GIE0 (0x07f8 / 4) | |
38 | #define R_TX_CTRL0 (0x07fc / 4) | |
39 | #define R_TX_BUF1 (0x0800 / 4) | |
40 | #define R_TX_LEN1 (0x0ff4 / 4) | |
41 | #define R_TX_CTRL1 (0x0ffc / 4) | |
42 | ||
43 | #define R_RX_BUF0 (0x1000 / 4) | |
44 | #define R_RX_CTRL0 (0x17fc / 4) | |
45 | #define R_RX_BUF1 (0x1800 / 4) | |
46 | #define R_RX_CTRL1 (0x1ffc / 4) | |
47 | #define R_MAX (0x2000 / 4) | |
48 | ||
49 | #define GIE_GIE 0x80000000 | |
50 | ||
51 | #define CTRL_I 0x8 | |
52 | #define CTRL_P 0x2 | |
53 | #define CTRL_S 0x1 | |
54 | ||
91a28042 | 55 | #define TYPE_XILINX_ETHLITE "xlnx.xps-ethernetlite" |
8110fa1d EH |
56 | DECLARE_INSTANCE_CHECKER(struct xlx_ethlite, XILINX_ETHLITE, |
57 | TYPE_XILINX_ETHLITE) | |
91a28042 | 58 | |
b43848a1 EI |
59 | struct xlx_ethlite |
60 | { | |
91a28042 AF |
61 | SysBusDevice parent_obj; |
62 | ||
010f3f5f | 63 | MemoryRegion mmio; |
b43848a1 | 64 | qemu_irq irq; |
d7539ab4 | 65 | NICState *nic; |
17d1ae3c | 66 | NICConf conf; |
b43848a1 | 67 | |
ee6847d1 GH |
68 | uint32_t c_tx_pingpong; |
69 | uint32_t c_rx_pingpong; | |
b43848a1 EI |
70 | unsigned int txbuf; |
71 | unsigned int rxbuf; | |
72 | ||
b43848a1 EI |
73 | uint32_t regs[R_MAX]; |
74 | }; | |
75 | ||
76 | static inline void eth_pulse_irq(struct xlx_ethlite *s) | |
77 | { | |
78 | /* Only the first gie reg is active. */ | |
79 | if (s->regs[R_TX_GIE0] & GIE_GIE) { | |
80 | qemu_irq_pulse(s->irq); | |
81 | } | |
82 | } | |
83 | ||
010f3f5f | 84 | static uint64_t |
a8170e5e | 85 | eth_read(void *opaque, hwaddr addr, unsigned int size) |
b43848a1 EI |
86 | { |
87 | struct xlx_ethlite *s = opaque; | |
88 | uint32_t r = 0; | |
89 | ||
90 | addr >>= 2; | |
91 | ||
92 | switch (addr) | |
93 | { | |
94 | case R_TX_GIE0: | |
95 | case R_TX_LEN0: | |
96 | case R_TX_LEN1: | |
97 | case R_TX_CTRL1: | |
98 | case R_TX_CTRL0: | |
99 | case R_RX_CTRL1: | |
100 | case R_RX_CTRL0: | |
101 | r = s->regs[addr]; | |
883f2c59 | 102 | D(qemu_log("%s " HWADDR_FMT_plx "=%x\n", __func__, addr * 4, r)); |
b43848a1 EI |
103 | break; |
104 | ||
b43848a1 | 105 | default: |
d48751ed | 106 | r = tswap32(s->regs[addr]); |
b43848a1 EI |
107 | break; |
108 | } | |
109 | return r; | |
110 | } | |
111 | ||
112 | static void | |
a8170e5e | 113 | eth_write(void *opaque, hwaddr addr, |
010f3f5f | 114 | uint64_t val64, unsigned int size) |
b43848a1 EI |
115 | { |
116 | struct xlx_ethlite *s = opaque; | |
117 | unsigned int base = 0; | |
010f3f5f | 118 | uint32_t value = val64; |
b43848a1 EI |
119 | |
120 | addr >>= 2; | |
121 | switch (addr) | |
122 | { | |
123 | case R_TX_CTRL0: | |
124 | case R_TX_CTRL1: | |
125 | if (addr == R_TX_CTRL1) | |
126 | base = 0x800 / 4; | |
127 | ||
883f2c59 | 128 | D(qemu_log("%s addr=" HWADDR_FMT_plx " val=%x\n", |
6034fe7b | 129 | __func__, addr * 4, value)); |
b43848a1 | 130 | if ((value & (CTRL_P | CTRL_S)) == CTRL_S) { |
b356f76d | 131 | qemu_send_packet(qemu_get_queue(s->nic), |
b43848a1 EI |
132 | (void *) &s->regs[base], |
133 | s->regs[base + R_TX_LEN0]); | |
134 | D(qemu_log("eth_tx %d\n", s->regs[base + R_TX_LEN0])); | |
135 | if (s->regs[base + R_TX_CTRL0] & CTRL_I) | |
136 | eth_pulse_irq(s); | |
137 | } else if ((value & (CTRL_P | CTRL_S)) == (CTRL_P | CTRL_S)) { | |
17d1ae3c | 138 | memcpy(&s->conf.macaddr.a[0], &s->regs[base], 6); |
b43848a1 EI |
139 | if (s->regs[base + R_TX_CTRL0] & CTRL_I) |
140 | eth_pulse_irq(s); | |
141 | } | |
142 | ||
143 | /* We are fast and get ready pretty much immediately so | |
144 | we actually never flip the S nor P bits to one. */ | |
145 | s->regs[addr] = value & ~(CTRL_P | CTRL_S); | |
146 | break; | |
147 | ||
148 | /* Keep these native. */ | |
2f991adb PC |
149 | case R_RX_CTRL0: |
150 | case R_RX_CTRL1: | |
151 | if (!(value & CTRL_S)) { | |
b356f76d | 152 | qemu_flush_queued_packets(qemu_get_queue(s->nic)); |
2f991adb | 153 | } |
31da45ce | 154 | /* fall through */ |
b43848a1 EI |
155 | case R_TX_LEN0: |
156 | case R_TX_LEN1: | |
157 | case R_TX_GIE0: | |
883f2c59 | 158 | D(qemu_log("%s addr=" HWADDR_FMT_plx " val=%x\n", |
6034fe7b | 159 | __func__, addr * 4, value)); |
b43848a1 EI |
160 | s->regs[addr] = value; |
161 | break; | |
162 | ||
b43848a1 | 163 | default: |
d48751ed | 164 | s->regs[addr] = tswap32(value); |
b43848a1 EI |
165 | break; |
166 | } | |
167 | } | |
168 | ||
010f3f5f EI |
169 | static const MemoryRegionOps eth_ops = { |
170 | .read = eth_read, | |
171 | .write = eth_write, | |
172 | .endianness = DEVICE_NATIVE_ENDIAN, | |
173 | .valid = { | |
174 | .min_access_size = 4, | |
175 | .max_access_size = 4 | |
176 | } | |
b43848a1 EI |
177 | }; |
178 | ||
b8c4b67e | 179 | static bool eth_can_rx(NetClientState *nc) |
b43848a1 | 180 | { |
cc1f0f45 | 181 | struct xlx_ethlite *s = qemu_get_nic_opaque(nc); |
808fb9f2 PC |
182 | unsigned int rxbase = s->rxbuf * (0x800 / 4); |
183 | ||
184 | return !(s->regs[rxbase + R_RX_CTRL0] & CTRL_S); | |
b43848a1 EI |
185 | } |
186 | ||
4e68f7a0 | 187 | static ssize_t eth_rx(NetClientState *nc, const uint8_t *buf, size_t size) |
b43848a1 | 188 | { |
cc1f0f45 | 189 | struct xlx_ethlite *s = qemu_get_nic_opaque(nc); |
b43848a1 | 190 | unsigned int rxbase = s->rxbuf * (0x800 / 4); |
b43848a1 EI |
191 | |
192 | /* DA filter. */ | |
17d1ae3c | 193 | if (!(buf[0] & 0x80) && memcmp(&s->conf.macaddr.a[0], buf, 6)) |
df12c1f5 | 194 | return size; |
b43848a1 EI |
195 | |
196 | if (s->regs[rxbase + R_RX_CTRL0] & CTRL_S) { | |
197 | D(qemu_log("ethlite lost packet %x\n", s->regs[R_RX_CTRL0])); | |
df12c1f5 | 198 | return -1; |
b43848a1 EI |
199 | } |
200 | ||
6034fe7b | 201 | D(qemu_log("%s %zd rxbase=%x\n", __func__, size, rxbase)); |
a0d1cbda | 202 | if (size > (R_MAX - R_RX_BUF0 - rxbase) * 4) { |
203 | D(qemu_log("ethlite packet is too big, size=%x\n", size)); | |
204 | return -1; | |
205 | } | |
b43848a1 EI |
206 | memcpy(&s->regs[rxbase + R_RX_BUF0], buf, size); |
207 | ||
b43848a1 | 208 | s->regs[rxbase + R_RX_CTRL0] |= CTRL_S; |
40e76f73 | 209 | if (s->regs[R_RX_CTRL0] & CTRL_I) { |
b43848a1 | 210 | eth_pulse_irq(s); |
40e76f73 | 211 | } |
b43848a1 EI |
212 | |
213 | /* If c_rx_pingpong was set flip buffers. */ | |
214 | s->rxbuf ^= s->c_rx_pingpong; | |
df12c1f5 | 215 | return size; |
b43848a1 EI |
216 | } |
217 | ||
8c6d9672 PC |
218 | static void xilinx_ethlite_reset(DeviceState *dev) |
219 | { | |
220 | struct xlx_ethlite *s = XILINX_ETHLITE(dev); | |
221 | ||
222 | s->rxbuf = 0; | |
223 | } | |
224 | ||
d7539ab4 | 225 | static NetClientInfo net_xilinx_ethlite_info = { |
f394b2e2 | 226 | .type = NET_CLIENT_DRIVER_NIC, |
d7539ab4 MM |
227 | .size = sizeof(NICState), |
228 | .can_receive = eth_can_rx, | |
229 | .receive = eth_rx, | |
d7539ab4 MM |
230 | }; |
231 | ||
e8198f6e | 232 | static void xilinx_ethlite_realize(DeviceState *dev, Error **errp) |
b43848a1 | 233 | { |
91a28042 | 234 | struct xlx_ethlite *s = XILINX_ETHLITE(dev); |
b43848a1 | 235 | |
17d1ae3c | 236 | qemu_macaddr_default_if_unset(&s->conf.macaddr); |
d7539ab4 | 237 | s->nic = qemu_new_nic(&net_xilinx_ethlite_info, &s->conf, |
91a28042 | 238 | object_get_typename(OBJECT(dev)), dev->id, s); |
b356f76d | 239 | qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); |
e8198f6e PC |
240 | } |
241 | ||
242 | static void xilinx_ethlite_init(Object *obj) | |
243 | { | |
244 | struct xlx_ethlite *s = XILINX_ETHLITE(obj); | |
245 | ||
246 | sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); | |
247 | ||
248 | memory_region_init_io(&s->mmio, obj, ð_ops, s, | |
249 | "xlnx.xps-ethernetlite", R_MAX * 4); | |
250 | sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); | |
b43848a1 EI |
251 | } |
252 | ||
999e12bb | 253 | static Property xilinx_ethlite_properties[] = { |
b2d85c34 PC |
254 | DEFINE_PROP_UINT32("tx-ping-pong", struct xlx_ethlite, c_tx_pingpong, 1), |
255 | DEFINE_PROP_UINT32("rx-ping-pong", struct xlx_ethlite, c_rx_pingpong, 1), | |
999e12bb AL |
256 | DEFINE_NIC_PROPERTIES(struct xlx_ethlite, conf), |
257 | DEFINE_PROP_END_OF_LIST(), | |
258 | }; | |
259 | ||
260 | static void xilinx_ethlite_class_init(ObjectClass *klass, void *data) | |
261 | { | |
39bffca2 | 262 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb | 263 | |
e8198f6e | 264 | dc->realize = xilinx_ethlite_realize; |
8c6d9672 | 265 | dc->reset = xilinx_ethlite_reset; |
4f67d30b | 266 | device_class_set_props(dc, xilinx_ethlite_properties); |
999e12bb AL |
267 | } |
268 | ||
8c43a6f0 | 269 | static const TypeInfo xilinx_ethlite_info = { |
91a28042 | 270 | .name = TYPE_XILINX_ETHLITE, |
39bffca2 AL |
271 | .parent = TYPE_SYS_BUS_DEVICE, |
272 | .instance_size = sizeof(struct xlx_ethlite), | |
e8198f6e | 273 | .instance_init = xilinx_ethlite_init, |
39bffca2 | 274 | .class_init = xilinx_ethlite_class_init, |
ee6847d1 GH |
275 | }; |
276 | ||
83f7d43a | 277 | static void xilinx_ethlite_register_types(void) |
b43848a1 | 278 | { |
39bffca2 | 279 | type_register_static(&xilinx_ethlite_info); |
b43848a1 EI |
280 | } |
281 | ||
83f7d43a | 282 | type_init(xilinx_ethlite_register_types) |