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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 | ||
25 | #include "sysbus.h" | |
26 | #include "hw.h" | |
27 | #include "net.h" | |
28 | ||
29 | #define D(x) | |
30 | #define R_TX_BUF0 0 | |
31 | #define R_TX_LEN0 (0x07f4 / 4) | |
32 | #define R_TX_GIE0 (0x07f8 / 4) | |
33 | #define R_TX_CTRL0 (0x07fc / 4) | |
34 | #define R_TX_BUF1 (0x0800 / 4) | |
35 | #define R_TX_LEN1 (0x0ff4 / 4) | |
36 | #define R_TX_CTRL1 (0x0ffc / 4) | |
37 | ||
38 | #define R_RX_BUF0 (0x1000 / 4) | |
39 | #define R_RX_CTRL0 (0x17fc / 4) | |
40 | #define R_RX_BUF1 (0x1800 / 4) | |
41 | #define R_RX_CTRL1 (0x1ffc / 4) | |
42 | #define R_MAX (0x2000 / 4) | |
43 | ||
44 | #define GIE_GIE 0x80000000 | |
45 | ||
46 | #define CTRL_I 0x8 | |
47 | #define CTRL_P 0x2 | |
48 | #define CTRL_S 0x1 | |
49 | ||
50 | struct xlx_ethlite | |
51 | { | |
52 | SysBusDevice busdev; | |
010f3f5f | 53 | MemoryRegion mmio; |
b43848a1 | 54 | qemu_irq irq; |
d7539ab4 | 55 | NICState *nic; |
17d1ae3c | 56 | NICConf conf; |
b43848a1 | 57 | |
ee6847d1 GH |
58 | uint32_t c_tx_pingpong; |
59 | uint32_t c_rx_pingpong; | |
b43848a1 EI |
60 | unsigned int txbuf; |
61 | unsigned int rxbuf; | |
62 | ||
b43848a1 EI |
63 | uint32_t regs[R_MAX]; |
64 | }; | |
65 | ||
66 | static inline void eth_pulse_irq(struct xlx_ethlite *s) | |
67 | { | |
68 | /* Only the first gie reg is active. */ | |
69 | if (s->regs[R_TX_GIE0] & GIE_GIE) { | |
70 | qemu_irq_pulse(s->irq); | |
71 | } | |
72 | } | |
73 | ||
010f3f5f EI |
74 | static uint64_t |
75 | eth_read(void *opaque, target_phys_addr_t addr, unsigned int size) | |
b43848a1 EI |
76 | { |
77 | struct xlx_ethlite *s = opaque; | |
78 | uint32_t r = 0; | |
79 | ||
80 | addr >>= 2; | |
81 | ||
82 | switch (addr) | |
83 | { | |
84 | case R_TX_GIE0: | |
85 | case R_TX_LEN0: | |
86 | case R_TX_LEN1: | |
87 | case R_TX_CTRL1: | |
88 | case R_TX_CTRL0: | |
89 | case R_RX_CTRL1: | |
90 | case R_RX_CTRL0: | |
91 | r = s->regs[addr]; | |
92 | D(qemu_log("%s %x=%x\n", __func__, addr * 4, r)); | |
93 | break; | |
94 | ||
b43848a1 | 95 | default: |
d48751ed | 96 | r = tswap32(s->regs[addr]); |
b43848a1 EI |
97 | break; |
98 | } | |
99 | return r; | |
100 | } | |
101 | ||
102 | static void | |
010f3f5f EI |
103 | eth_write(void *opaque, target_phys_addr_t addr, |
104 | uint64_t val64, unsigned int size) | |
b43848a1 EI |
105 | { |
106 | struct xlx_ethlite *s = opaque; | |
107 | unsigned int base = 0; | |
010f3f5f | 108 | uint32_t value = val64; |
b43848a1 EI |
109 | |
110 | addr >>= 2; | |
111 | switch (addr) | |
112 | { | |
113 | case R_TX_CTRL0: | |
114 | case R_TX_CTRL1: | |
115 | if (addr == R_TX_CTRL1) | |
116 | base = 0x800 / 4; | |
117 | ||
118 | D(qemu_log("%s addr=%x val=%x\n", __func__, addr * 4, value)); | |
119 | if ((value & (CTRL_P | CTRL_S)) == CTRL_S) { | |
d7539ab4 | 120 | qemu_send_packet(&s->nic->nc, |
b43848a1 EI |
121 | (void *) &s->regs[base], |
122 | s->regs[base + R_TX_LEN0]); | |
123 | D(qemu_log("eth_tx %d\n", s->regs[base + R_TX_LEN0])); | |
124 | if (s->regs[base + R_TX_CTRL0] & CTRL_I) | |
125 | eth_pulse_irq(s); | |
126 | } else if ((value & (CTRL_P | CTRL_S)) == (CTRL_P | CTRL_S)) { | |
17d1ae3c | 127 | memcpy(&s->conf.macaddr.a[0], &s->regs[base], 6); |
b43848a1 EI |
128 | if (s->regs[base + R_TX_CTRL0] & CTRL_I) |
129 | eth_pulse_irq(s); | |
130 | } | |
131 | ||
132 | /* We are fast and get ready pretty much immediately so | |
133 | we actually never flip the S nor P bits to one. */ | |
134 | s->regs[addr] = value & ~(CTRL_P | CTRL_S); | |
135 | break; | |
136 | ||
137 | /* Keep these native. */ | |
138 | case R_TX_LEN0: | |
139 | case R_TX_LEN1: | |
140 | case R_TX_GIE0: | |
141 | case R_RX_CTRL0: | |
142 | case R_RX_CTRL1: | |
143 | D(qemu_log("%s addr=%x val=%x\n", __func__, addr * 4, value)); | |
144 | s->regs[addr] = value; | |
145 | break; | |
146 | ||
b43848a1 | 147 | default: |
d48751ed | 148 | s->regs[addr] = tswap32(value); |
b43848a1 EI |
149 | break; |
150 | } | |
151 | } | |
152 | ||
010f3f5f EI |
153 | static const MemoryRegionOps eth_ops = { |
154 | .read = eth_read, | |
155 | .write = eth_write, | |
156 | .endianness = DEVICE_NATIVE_ENDIAN, | |
157 | .valid = { | |
158 | .min_access_size = 4, | |
159 | .max_access_size = 4 | |
160 | } | |
b43848a1 EI |
161 | }; |
162 | ||
d7539ab4 | 163 | static int eth_can_rx(VLANClientState *nc) |
b43848a1 | 164 | { |
d7539ab4 | 165 | struct xlx_ethlite *s = DO_UPCAST(NICState, nc, nc)->opaque; |
b43848a1 EI |
166 | int r; |
167 | r = !(s->regs[R_RX_CTRL0] & CTRL_S); | |
b43848a1 EI |
168 | return r; |
169 | } | |
170 | ||
d7539ab4 | 171 | static ssize_t eth_rx(VLANClientState *nc, const uint8_t *buf, size_t size) |
b43848a1 | 172 | { |
d7539ab4 | 173 | struct xlx_ethlite *s = DO_UPCAST(NICState, nc, nc)->opaque; |
b43848a1 | 174 | unsigned int rxbase = s->rxbuf * (0x800 / 4); |
b43848a1 EI |
175 | |
176 | /* DA filter. */ | |
17d1ae3c | 177 | if (!(buf[0] & 0x80) && memcmp(&s->conf.macaddr.a[0], buf, 6)) |
df12c1f5 | 178 | return size; |
b43848a1 EI |
179 | |
180 | if (s->regs[rxbase + R_RX_CTRL0] & CTRL_S) { | |
181 | D(qemu_log("ethlite lost packet %x\n", s->regs[R_RX_CTRL0])); | |
df12c1f5 | 182 | return -1; |
b43848a1 EI |
183 | } |
184 | ||
185 | D(qemu_log("%s %d rxbase=%x\n", __func__, size, rxbase)); | |
186 | memcpy(&s->regs[rxbase + R_RX_BUF0], buf, size); | |
187 | ||
b43848a1 EI |
188 | s->regs[rxbase + R_RX_CTRL0] |= CTRL_S; |
189 | if (s->regs[rxbase + R_RX_CTRL0] & CTRL_I) | |
190 | eth_pulse_irq(s); | |
191 | ||
192 | /* If c_rx_pingpong was set flip buffers. */ | |
193 | s->rxbuf ^= s->c_rx_pingpong; | |
df12c1f5 | 194 | return size; |
b43848a1 EI |
195 | } |
196 | ||
d7539ab4 | 197 | static void eth_cleanup(VLANClientState *nc) |
b43848a1 | 198 | { |
d7539ab4 | 199 | struct xlx_ethlite *s = DO_UPCAST(NICState, nc, nc)->opaque; |
17d1ae3c | 200 | |
d7539ab4 | 201 | s->nic = NULL; |
b43848a1 EI |
202 | } |
203 | ||
d7539ab4 MM |
204 | static NetClientInfo net_xilinx_ethlite_info = { |
205 | .type = NET_CLIENT_TYPE_NIC, | |
206 | .size = sizeof(NICState), | |
207 | .can_receive = eth_can_rx, | |
208 | .receive = eth_rx, | |
209 | .cleanup = eth_cleanup, | |
210 | }; | |
211 | ||
81a322d4 | 212 | static int xilinx_ethlite_init(SysBusDevice *dev) |
b43848a1 EI |
213 | { |
214 | struct xlx_ethlite *s = FROM_SYSBUS(typeof (*s), dev); | |
b43848a1 EI |
215 | |
216 | sysbus_init_irq(dev, &s->irq); | |
b43848a1 EI |
217 | s->rxbuf = 0; |
218 | ||
7f4d6755 PC |
219 | memory_region_init_io(&s->mmio, ð_ops, s, "xlnx.xps-ethernetlite", |
220 | R_MAX * 4); | |
750ecd44 | 221 | sysbus_init_mmio(dev, &s->mmio); |
b43848a1 | 222 | |
17d1ae3c | 223 | qemu_macaddr_default_if_unset(&s->conf.macaddr); |
d7539ab4 | 224 | s->nic = qemu_new_nic(&net_xilinx_ethlite_info, &s->conf, |
f79f2bfc | 225 | object_get_typename(OBJECT(dev)), dev->qdev.id, s); |
d7539ab4 | 226 | qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a); |
81a322d4 | 227 | return 0; |
b43848a1 EI |
228 | } |
229 | ||
999e12bb | 230 | static Property xilinx_ethlite_properties[] = { |
b2d85c34 PC |
231 | DEFINE_PROP_UINT32("tx-ping-pong", struct xlx_ethlite, c_tx_pingpong, 1), |
232 | DEFINE_PROP_UINT32("rx-ping-pong", struct xlx_ethlite, c_rx_pingpong, 1), | |
999e12bb AL |
233 | DEFINE_NIC_PROPERTIES(struct xlx_ethlite, conf), |
234 | DEFINE_PROP_END_OF_LIST(), | |
235 | }; | |
236 | ||
237 | static void xilinx_ethlite_class_init(ObjectClass *klass, void *data) | |
238 | { | |
39bffca2 | 239 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb AL |
240 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
241 | ||
242 | k->init = xilinx_ethlite_init; | |
39bffca2 | 243 | dc->props = xilinx_ethlite_properties; |
999e12bb AL |
244 | } |
245 | ||
39bffca2 | 246 | static TypeInfo xilinx_ethlite_info = { |
7f4d6755 | 247 | .name = "xlnx.xps-ethernetlite", |
39bffca2 AL |
248 | .parent = TYPE_SYS_BUS_DEVICE, |
249 | .instance_size = sizeof(struct xlx_ethlite), | |
250 | .class_init = xilinx_ethlite_class_init, | |
ee6847d1 GH |
251 | }; |
252 | ||
83f7d43a | 253 | static void xilinx_ethlite_register_types(void) |
b43848a1 | 254 | { |
39bffca2 | 255 | type_register_static(&xilinx_ethlite_info); |
b43848a1 EI |
256 | } |
257 | ||
83f7d43a | 258 | type_init(xilinx_ethlite_register_types) |