2 * QEMU model of the Xilinx Ethernet Lite MAC.
4 * Copyright (c) 2009 Edgar E. Iglesias.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
25 #include "hw/sysbus.h"
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)
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)
44 #define GIE_GIE 0x80000000
50 #define TYPE_XILINX_ETHLITE "xlnx.xps-ethernetlite"
51 #define XILINX_ETHLITE(obj) \
52 OBJECT_CHECK(struct xlx_ethlite, (obj), TYPE_XILINX_ETHLITE)
56 SysBusDevice parent_obj;
63 uint32_t c_tx_pingpong;
64 uint32_t c_rx_pingpong;
71 static inline void eth_pulse_irq(struct xlx_ethlite *s)
73 /* Only the first gie reg is active. */
74 if (s->regs[R_TX_GIE0] & GIE_GIE) {
75 qemu_irq_pulse(s->irq);
80 eth_read(void *opaque, hwaddr addr, unsigned int size)
82 struct xlx_ethlite *s = opaque;
97 D(qemu_log("%s " TARGET_FMT_plx "=%x\n", __func__, addr * 4, r));
101 r = tswap32(s->regs[addr]);
108 eth_write(void *opaque, hwaddr addr,
109 uint64_t val64, unsigned int size)
111 struct xlx_ethlite *s = opaque;
112 unsigned int base = 0;
113 uint32_t value = val64;
120 if (addr == R_TX_CTRL1)
123 D(qemu_log("%s addr=" TARGET_FMT_plx " val=%x\n",
124 __func__, addr * 4, value));
125 if ((value & (CTRL_P | CTRL_S)) == CTRL_S) {
126 qemu_send_packet(qemu_get_queue(s->nic),
127 (void *) &s->regs[base],
128 s->regs[base + R_TX_LEN0]);
129 D(qemu_log("eth_tx %d\n", s->regs[base + R_TX_LEN0]));
130 if (s->regs[base + R_TX_CTRL0] & CTRL_I)
132 } else if ((value & (CTRL_P | CTRL_S)) == (CTRL_P | CTRL_S)) {
133 memcpy(&s->conf.macaddr.a[0], &s->regs[base], 6);
134 if (s->regs[base + R_TX_CTRL0] & CTRL_I)
138 /* We are fast and get ready pretty much immediately so
139 we actually never flip the S nor P bits to one. */
140 s->regs[addr] = value & ~(CTRL_P | CTRL_S);
143 /* Keep these native. */
146 if (!(value & CTRL_S)) {
147 qemu_flush_queued_packets(qemu_get_queue(s->nic));
152 D(qemu_log("%s addr=" TARGET_FMT_plx " val=%x\n",
153 __func__, addr * 4, value));
154 s->regs[addr] = value;
158 s->regs[addr] = tswap32(value);
163 static const MemoryRegionOps eth_ops = {
166 .endianness = DEVICE_NATIVE_ENDIAN,
168 .min_access_size = 4,
173 static int eth_can_rx(NetClientState *nc)
175 struct xlx_ethlite *s = qemu_get_nic_opaque(nc);
176 unsigned int rxbase = s->rxbuf * (0x800 / 4);
178 return !(s->regs[rxbase + R_RX_CTRL0] & CTRL_S);
181 static ssize_t eth_rx(NetClientState *nc, const uint8_t *buf, size_t size)
183 struct xlx_ethlite *s = qemu_get_nic_opaque(nc);
184 unsigned int rxbase = s->rxbuf * (0x800 / 4);
187 if (!(buf[0] & 0x80) && memcmp(&s->conf.macaddr.a[0], buf, 6))
190 if (s->regs[rxbase + R_RX_CTRL0] & CTRL_S) {
191 D(qemu_log("ethlite lost packet %x\n", s->regs[R_RX_CTRL0]));
195 D(qemu_log("%s %zd rxbase=%x\n", __func__, size, rxbase));
196 memcpy(&s->regs[rxbase + R_RX_BUF0], buf, size);
198 s->regs[rxbase + R_RX_CTRL0] |= CTRL_S;
199 if (s->regs[rxbase + R_RX_CTRL0] & CTRL_I)
202 /* If c_rx_pingpong was set flip buffers. */
203 s->rxbuf ^= s->c_rx_pingpong;
207 static void eth_cleanup(NetClientState *nc)
209 struct xlx_ethlite *s = qemu_get_nic_opaque(nc);
214 static NetClientInfo net_xilinx_ethlite_info = {
215 .type = NET_CLIENT_OPTIONS_KIND_NIC,
216 .size = sizeof(NICState),
217 .can_receive = eth_can_rx,
219 .cleanup = eth_cleanup,
222 static int xilinx_ethlite_init(SysBusDevice *sbd)
224 DeviceState *dev = DEVICE(sbd);
225 struct xlx_ethlite *s = XILINX_ETHLITE(dev);
227 sysbus_init_irq(sbd, &s->irq);
230 memory_region_init_io(&s->mmio, OBJECT(s), ð_ops, s,
231 "xlnx.xps-ethernetlite", R_MAX * 4);
232 sysbus_init_mmio(sbd, &s->mmio);
234 qemu_macaddr_default_if_unset(&s->conf.macaddr);
235 s->nic = qemu_new_nic(&net_xilinx_ethlite_info, &s->conf,
236 object_get_typename(OBJECT(dev)), dev->id, s);
237 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
241 static Property xilinx_ethlite_properties[] = {
242 DEFINE_PROP_UINT32("tx-ping-pong", struct xlx_ethlite, c_tx_pingpong, 1),
243 DEFINE_PROP_UINT32("rx-ping-pong", struct xlx_ethlite, c_rx_pingpong, 1),
244 DEFINE_NIC_PROPERTIES(struct xlx_ethlite, conf),
245 DEFINE_PROP_END_OF_LIST(),
248 static void xilinx_ethlite_class_init(ObjectClass *klass, void *data)
250 DeviceClass *dc = DEVICE_CLASS(klass);
251 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
253 k->init = xilinx_ethlite_init;
254 dc->props = xilinx_ethlite_properties;
257 static const TypeInfo xilinx_ethlite_info = {
258 .name = TYPE_XILINX_ETHLITE,
259 .parent = TYPE_SYS_BUS_DEVICE,
260 .instance_size = sizeof(struct xlx_ethlite),
261 .class_init = xilinx_ethlite_class_init,
264 static void xilinx_ethlite_register_types(void)
266 type_register_static(&xilinx_ethlite_info);
269 type_init(xilinx_ethlite_register_types)