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1/*
2 * QEMU AMD PC-Net II (Am79C970A) PCI emulation
3 *
4 * Copyright (c) 2004 Antony T Curtis
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/* This software was written to be compatible with the specification:
26 * AMD Am79C970A PCnet-PCI II Ethernet Controller Data-Sheet
27 * AMD Publication# 19436 Rev:E Amendment/0 Issue Date: June 2000
28 */
29
30#include "pci.h"
31#include "net.h"
32#include "loader.h"
33#include "qemu-timer.h"
14fecf26 34#include "dma.h"
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35
36#include "pcnet.h"
37
38//#define PCNET_DEBUG
39//#define PCNET_DEBUG_IO
40//#define PCNET_DEBUG_BCR
41//#define PCNET_DEBUG_CSR
42//#define PCNET_DEBUG_RMD
43//#define PCNET_DEBUG_TMD
44//#define PCNET_DEBUG_MATCH
45
46
47typedef struct {
48 PCIDevice pci_dev;
49 PCNetState state;
bd8d6f7c 50 MemoryRegion io_bar;
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51} PCIPCNetState;
52
53static void pcnet_aprom_writeb(void *opaque, uint32_t addr, uint32_t val)
54{
55 PCNetState *s = opaque;
56#ifdef PCNET_DEBUG
57 printf("pcnet_aprom_writeb addr=0x%08x val=0x%02x\n", addr, val);
58#endif
59 /* Check APROMWE bit to enable write access */
60 if (pcnet_bcr_readw(s,2) & 0x100)
61 s->prom[addr & 15] = val;
62}
63
64static uint32_t pcnet_aprom_readb(void *opaque, uint32_t addr)
65{
66 PCNetState *s = opaque;
67 uint32_t val = s->prom[addr & 15];
68#ifdef PCNET_DEBUG
69 printf("pcnet_aprom_readb addr=0x%08x val=0x%02x\n", addr, val);
70#endif
71 return val;
72}
73
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74static uint64_t pcnet_ioport_read(void *opaque, target_phys_addr_t addr,
75 unsigned size)
661a1799 76{
bd8d6f7c 77 PCNetState *d = opaque;
661a1799 78
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79 if (addr < 16 && size == 1) {
80 return pcnet_aprom_readb(d, addr);
81 } else if (addr >= 0x10 && addr < 0x20 && size == 2) {
82 return pcnet_ioport_readw(d, addr);
83 } else if (addr >= 0x10 && addr < 0x20 && size == 4) {
84 return pcnet_ioport_readl(d, addr);
85 }
86 return ((uint64_t)1 << (size * 8)) - 1;
87}
661a1799 88
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89static void pcnet_ioport_write(void *opaque, target_phys_addr_t addr,
90 uint64_t data, unsigned size)
91{
92 PCNetState *d = opaque;
661a1799 93
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94 if (addr < 16 && size == 1) {
95 return pcnet_aprom_writeb(d, addr, data);
96 } else if (addr >= 0x10 && addr < 0x20 && size == 2) {
97 return pcnet_ioport_writew(d, addr, data);
98 } else if (addr >= 0x10 && addr < 0x20 && size == 4) {
99 return pcnet_ioport_writel(d, addr, data);
100 }
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101}
102
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103static const MemoryRegionOps pcnet_io_ops = {
104 .read = pcnet_ioport_read,
105 .write = pcnet_ioport_write,
106 .endianness = DEVICE_NATIVE_ENDIAN,
107};
108
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109static void pcnet_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
110{
111 PCNetState *d = opaque;
112#ifdef PCNET_DEBUG_IO
113 printf("pcnet_mmio_writeb addr=0x" TARGET_FMT_plx" val=0x%02x\n", addr,
114 val);
115#endif
116 if (!(addr & 0x10))
117 pcnet_aprom_writeb(d, addr & 0x0f, val);
118}
119
120static uint32_t pcnet_mmio_readb(void *opaque, target_phys_addr_t addr)
121{
122 PCNetState *d = opaque;
123 uint32_t val = -1;
124 if (!(addr & 0x10))
125 val = pcnet_aprom_readb(d, addr & 0x0f);
126#ifdef PCNET_DEBUG_IO
127 printf("pcnet_mmio_readb addr=0x" TARGET_FMT_plx " val=0x%02x\n", addr,
128 val & 0xff);
129#endif
130 return val;
131}
132
133static void pcnet_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
134{
135 PCNetState *d = opaque;
136#ifdef PCNET_DEBUG_IO
137 printf("pcnet_mmio_writew addr=0x" TARGET_FMT_plx " val=0x%04x\n", addr,
138 val);
139#endif
140 if (addr & 0x10)
141 pcnet_ioport_writew(d, addr & 0x0f, val);
142 else {
143 addr &= 0x0f;
144 pcnet_aprom_writeb(d, addr, val & 0xff);
145 pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8);
146 }
147}
148
149static uint32_t pcnet_mmio_readw(void *opaque, target_phys_addr_t addr)
150{
151 PCNetState *d = opaque;
152 uint32_t val = -1;
153 if (addr & 0x10)
154 val = pcnet_ioport_readw(d, addr & 0x0f);
155 else {
156 addr &= 0x0f;
157 val = pcnet_aprom_readb(d, addr+1);
158 val <<= 8;
159 val |= pcnet_aprom_readb(d, addr);
160 }
161#ifdef PCNET_DEBUG_IO
162 printf("pcnet_mmio_readw addr=0x" TARGET_FMT_plx" val = 0x%04x\n", addr,
163 val & 0xffff);
164#endif
165 return val;
166}
167
168static void pcnet_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
169{
170 PCNetState *d = opaque;
171#ifdef PCNET_DEBUG_IO
172 printf("pcnet_mmio_writel addr=0x" TARGET_FMT_plx" val=0x%08x\n", addr,
173 val);
174#endif
175 if (addr & 0x10)
176 pcnet_ioport_writel(d, addr & 0x0f, val);
177 else {
178 addr &= 0x0f;
179 pcnet_aprom_writeb(d, addr, val & 0xff);
180 pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8);
181 pcnet_aprom_writeb(d, addr+2, (val & 0xff0000) >> 16);
182 pcnet_aprom_writeb(d, addr+3, (val & 0xff000000) >> 24);
183 }
184}
185
186static uint32_t pcnet_mmio_readl(void *opaque, target_phys_addr_t addr)
187{
188 PCNetState *d = opaque;
189 uint32_t val;
190 if (addr & 0x10)
191 val = pcnet_ioport_readl(d, addr & 0x0f);
192 else {
193 addr &= 0x0f;
194 val = pcnet_aprom_readb(d, addr+3);
195 val <<= 8;
196 val |= pcnet_aprom_readb(d, addr+2);
197 val <<= 8;
198 val |= pcnet_aprom_readb(d, addr+1);
199 val <<= 8;
200 val |= pcnet_aprom_readb(d, addr);
201 }
202#ifdef PCNET_DEBUG_IO
203 printf("pcnet_mmio_readl addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr,
204 val);
205#endif
206 return val;
207}
208
209static const VMStateDescription vmstate_pci_pcnet = {
210 .name = "pcnet",
211 .version_id = 3,
212 .minimum_version_id = 2,
213 .minimum_version_id_old = 2,
214 .fields = (VMStateField []) {
215 VMSTATE_PCI_DEVICE(pci_dev, PCIPCNetState),
216 VMSTATE_STRUCT(state, PCIPCNetState, 0, vmstate_pcnet, PCNetState),
217 VMSTATE_END_OF_LIST()
218 }
219};
220
221/* PCI interface */
222
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223static const MemoryRegionOps pcnet_mmio_ops = {
224 .old_mmio = {
225 .read = { pcnet_mmio_readb, pcnet_mmio_readw, pcnet_mmio_readl },
226 .write = { pcnet_mmio_writeb, pcnet_mmio_writew, pcnet_mmio_writel },
227 },
228 .endianness = DEVICE_NATIVE_ENDIAN,
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229};
230
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231static void pci_physical_memory_write(void *dma_opaque, target_phys_addr_t addr,
232 uint8_t *buf, int len, int do_bswap)
233{
14fecf26 234 pci_dma_write(dma_opaque, addr, buf, len);
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235}
236
237static void pci_physical_memory_read(void *dma_opaque, target_phys_addr_t addr,
238 uint8_t *buf, int len, int do_bswap)
239{
14fecf26 240 pci_dma_read(dma_opaque, addr, buf, len);
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241}
242
243static void pci_pcnet_cleanup(VLANClientState *nc)
244{
245 PCNetState *d = DO_UPCAST(NICState, nc, nc)->opaque;
246
247 pcnet_common_cleanup(d);
248}
249
250static int pci_pcnet_uninit(PCIDevice *dev)
251{
252 PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev, dev);
253
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254 memory_region_destroy(&d->state.mmio);
255 memory_region_destroy(&d->io_bar);
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256 qemu_del_timer(d->state.poll_timer);
257 qemu_free_timer(d->state.poll_timer);
258 qemu_del_vlan_client(&d->state.nic->nc);
259 return 0;
260}
261
262static NetClientInfo net_pci_pcnet_info = {
263 .type = NET_CLIENT_TYPE_NIC,
264 .size = sizeof(NICState),
265 .can_receive = pcnet_can_receive,
266 .receive = pcnet_receive,
267 .cleanup = pci_pcnet_cleanup,
268};
269
270static int pci_pcnet_init(PCIDevice *pci_dev)
271{
272 PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev, pci_dev);
273 PCNetState *s = &d->state;
274 uint8_t *pci_conf;
275
276#if 0
277 printf("sizeof(RMD)=%d, sizeof(TMD)=%d\n",
278 sizeof(struct pcnet_RMD), sizeof(struct pcnet_TMD));
279#endif
280
281 pci_conf = pci_dev->config;
282
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283 pci_set_word(pci_conf + PCI_STATUS,
284 PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
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285
286 pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0);
287 pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0);
288
817e0b6f 289 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
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290 pci_conf[PCI_MIN_GNT] = 0x06;
291 pci_conf[PCI_MAX_LAT] = 0xff;
292
293 /* Handler for memory-mapped I/O */
145aebec 294 memory_region_init_io(&d->state.mmio, &pcnet_mmio_ops, s, "pcnet-mmio",
bd8d6f7c 295 PCNET_PNPMMIO_SIZE);
661a1799 296
145aebec 297 memory_region_init_io(&d->io_bar, &pcnet_io_ops, s, "pcnet-io",
bd8d6f7c 298 PCNET_IOPORT_SIZE);
e824b2cc 299 pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar);
661a1799 300
e824b2cc 301 pci_register_bar(pci_dev, 1, 0, &s->mmio);
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302
303 s->irq = pci_dev->irq[0];
304 s->phys_mem_read = pci_physical_memory_read;
305 s->phys_mem_write = pci_physical_memory_write;
14fecf26 306 s->dma_opaque = pci_dev;
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307
308 if (!pci_dev->qdev.hotplugged) {
309 static int loaded = 0;
310 if (!loaded) {
5ee8ad71 311 rom_add_option("pxe-pcnet.rom", -1);
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312 loaded = 1;
313 }
314 }
315
316 return pcnet_common_init(&pci_dev->qdev, s, &net_pci_pcnet_info);
317}
318
319static void pci_reset(DeviceState *dev)
320{
321 PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev.qdev, dev);
322
323 pcnet_h_reset(&d->state);
324}
325
326static PCIDeviceInfo pcnet_info = {
327 .qdev.name = "pcnet",
328 .qdev.size = sizeof(PCIPCNetState),
329 .qdev.reset = pci_reset,
330 .qdev.vmsd = &vmstate_pci_pcnet,
331 .init = pci_pcnet_init,
332 .exit = pci_pcnet_uninit,
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333 .vendor_id = PCI_VENDOR_ID_AMD,
334 .device_id = PCI_DEVICE_ID_AMD_LANCE,
335 .revision = 0x10,
336 .class_id = PCI_CLASS_NETWORK_ETHERNET,
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337 .qdev.props = (Property[]) {
338 DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf),
339 DEFINE_PROP_END_OF_LIST(),
340 }
341};
342
343static void pci_pcnet_register_devices(void)
344{
345 pci_qdev_register(&pcnet_info);
346}
347
348device_init(pci_pcnet_register_devices)