aboutsummaryrefslogtreecommitdiff
path: root/hw/pcnet-pci.c
blob: 40a0e6eda4f1b4ad845f2ca358121e0f41cd922a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/*
 * QEMU AMD PC-Net II (Am79C970A) PCI emulation
 *
 * Copyright (c) 2004 Antony T Curtis
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/* This software was written to be compatible with the specification:
 * AMD Am79C970A PCnet-PCI II Ethernet Controller Data-Sheet
 * AMD Publication# 19436  Rev:E  Amendment/0  Issue Date: June 2000
 */

#include "pci/pci.h"
#include "net/net.h"
#include "loader.h"
#include "qemu/timer.h"
#include "sysemu/dma.h"

#include "pcnet.h"

//#define PCNET_DEBUG
//#define PCNET_DEBUG_IO
//#define PCNET_DEBUG_BCR
//#define PCNET_DEBUG_CSR
//#define PCNET_DEBUG_RMD
//#define PCNET_DEBUG_TMD
//#define PCNET_DEBUG_MATCH


typedef struct {
    PCIDevice pci_dev;
    PCNetState state;
    MemoryRegion io_bar;
} PCIPCNetState;

static void pcnet_aprom_writeb(void *opaque, uint32_t addr, uint32_t val)
{
    PCNetState *s = opaque;
#ifdef PCNET_DEBUG
    printf("pcnet_aprom_writeb addr=0x%08x val=0x%02x\n", addr, val);
#endif
    if (BCR_APROMWE(s)) {
        s->prom[addr & 15] = val;
    }
}

static uint32_t pcnet_aprom_readb(void *opaque, uint32_t addr)
{
    PCNetState *s = opaque;
    uint32_t val = s->prom[addr & 15];
#ifdef PCNET_DEBUG
    printf("pcnet_aprom_readb addr=0x%08x val=0x%02x\n", addr, val);
#endif
    return val;
}

static uint64_t pcnet_ioport_read(void *opaque, hwaddr addr,
                                  unsigned size)
{
    PCNetState *d = opaque;

    if (addr < 0x10) {
        if (!BCR_DWIO(d) && size == 1) {
            return pcnet_aprom_readb(d, addr);
        } else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) {
            return pcnet_aprom_readb(d, addr) |
                   (pcnet_aprom_readb(d, addr + 1) << 8);
        } else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) {
            return pcnet_aprom_readb(d, addr) |
                   (pcnet_aprom_readb(d, addr + 1) << 8) |
                   (pcnet_aprom_readb(d, addr + 2) << 16) |
                   (pcnet_aprom_readb(d, addr + 3) << 24);
        }
    } else {
        if (size == 2) {
            return pcnet_ioport_readw(d, addr);
        } else if (size == 4) {
            return pcnet_ioport_readl(d, addr);
        }
    }
    return ((uint64_t)1 << (size * 8)) - 1;
}

static void pcnet_ioport_write(void *opaque, hwaddr addr,
                               uint64_t data, unsigned size)
{
    PCNetState *d = opaque;

    if (addr < 0x10) {
        if (!BCR_DWIO(d) && size == 1) {
            pcnet_aprom_writeb(d, addr, data);
        } else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) {
            pcnet_aprom_writeb(d, addr, data & 0xff);
            pcnet_aprom_writeb(d, addr + 1, data >> 8);
        } else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) {
            pcnet_aprom_writeb(d, addr, data & 0xff);
            pcnet_aprom_writeb(d, addr + 1, (data >> 8) & 0xff);
            pcnet_aprom_writeb(d, addr + 2, (data >> 16) & 0xff);
            pcnet_aprom_writeb(d, addr + 3, data >> 24);
        }
    } else {
        if (size == 2) {
            pcnet_ioport_writew(d, addr, data);
        } else if (size == 4) {
            pcnet_ioport_writel(d, addr, data);
        }
    }
}

static const MemoryRegionOps pcnet_io_ops = {
    .read = pcnet_ioport_read,
    .write = pcnet_ioport_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static void pcnet_mmio_writeb(void *opaque, hwaddr addr, uint32_t val)
{
    PCNetState *d = opaque;
#ifdef PCNET_DEBUG_IO
    printf("pcnet_mmio_writeb addr=0x" TARGET_FMT_plx" val=0x%02x\n", addr,
           val);
#endif
    if (!(addr & 0x10))
        pcnet_aprom_writeb(d, addr & 0x0f, val);
}

static uint32_t pcnet_mmio_readb(void *opaque, hwaddr addr)
{
    PCNetState *d = opaque;
    uint32_t val = -1;
    if (!(addr & 0x10))
        val = pcnet_aprom_readb(d, addr & 0x0f);
#ifdef PCNET_DEBUG_IO
    printf("pcnet_mmio_readb addr=0x" TARGET_FMT_plx " val=0x%02x\n", addr,
           val & 0xff);
#endif
    return val;
}

static void pcnet_mmio_writew(void *opaque, hwaddr addr, uint32_t val)
{
    PCNetState *d = opaque;
#ifdef PCNET_DEBUG_IO
    printf("pcnet_mmio_writew addr=0x" TARGET_FMT_plx " val=0x%04x\n", addr,
           val);
#endif
    if (addr & 0x10)
        pcnet_ioport_writew(d, addr & 0x0f, val);
    else {
        addr &= 0x0f;
        pcnet_aprom_writeb(d, addr, val & 0xff);
        pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8);
    }
}

static uint32_t pcnet_mmio_readw(void *opaque, hwaddr addr)
{
    PCNetState *d = opaque;
    uint32_t val = -1;
    if (addr & 0x10)
        val = pcnet_ioport_readw(d, addr & 0x0f);
    else {
        addr &= 0x0f;
        val = pcnet_aprom_readb(d, addr+1);
        val <<= 8;
        val |= pcnet_aprom_readb(d, addr);
    }
#ifdef PCNET_DEBUG_IO
    printf("pcnet_mmio_readw addr=0x" TARGET_FMT_plx" val = 0x%04x\n", addr,
           val & 0xffff);
#endif
    return val;
}

static void pcnet_mmio_writel(void *opaque, hwaddr addr, uint32_t val)
{
    PCNetState *d = opaque;
#ifdef PCNET_DEBUG_IO
    printf("pcnet_mmio_writel addr=0x" TARGET_FMT_plx" val=0x%08x\n", addr,
           val);
#endif
    if (addr & 0x10)
        pcnet_ioport_writel(d, addr & 0x0f, val);
    else {
        addr &= 0x0f;
        pcnet_aprom_writeb(d, addr, val & 0xff);
        pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8);
        pcnet_aprom_writeb(d, addr+2, (val & 0xff0000) >> 16);
        pcnet_aprom_writeb(d, addr+3, (val & 0xff000000) >> 24);
    }
}

static uint32_t pcnet_mmio_readl(void *opaque, hwaddr addr)
{
    PCNetState *d = opaque;
    uint32_t val;
    if (addr & 0x10)
        val = pcnet_ioport_readl(d, addr & 0x0f);
    else {
        addr &= 0x0f;
        val = pcnet_aprom_readb(d, addr+3);
        val <<= 8;
        val |= pcnet_aprom_readb(d, addr+2);
        val <<= 8;
        val |= pcnet_aprom_readb(d, addr+1);
        val <<= 8;
        val |= pcnet_aprom_readb(d, addr);
    }
#ifdef PCNET_DEBUG_IO
    printf("pcnet_mmio_readl addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr,
           val);
#endif
    return val;
}

static const VMStateDescription vmstate_pci_pcnet = {
    .name = "pcnet",
    .version_id = 3,
    .minimum_version_id = 2,
    .minimum_version_id_old = 2,
    .fields      = (VMStateField []) {
        VMSTATE_PCI_DEVICE(pci_dev, PCIPCNetState),
        VMSTATE_STRUCT(state, PCIPCNetState, 0, vmstate_pcnet, PCNetState),
        VMSTATE_END_OF_LIST()
    }
};

/* PCI interface */

static const MemoryRegionOps pcnet_mmio_ops = {
    .old_mmio = {
        .read = { pcnet_mmio_readb, pcnet_mmio_readw, pcnet_mmio_readl },
        .write = { pcnet_mmio_writeb, pcnet_mmio_writew, pcnet_mmio_writel },
    },
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static void pci_physical_memory_write(void *dma_opaque, hwaddr addr,
                                      uint8_t *buf, int len, int do_bswap)
{
    pci_dma_write(dma_opaque, addr, buf, len);
}

static void pci_physical_memory_read(void *dma_opaque, hwaddr addr,
                                     uint8_t *buf, int len, int do_bswap)
{
    pci_dma_read(dma_opaque, addr, buf, len);
}

static void pci_pcnet_cleanup(NetClientState *nc)
{
    PCNetState *d = DO_UPCAST(NICState, nc, nc)->opaque;

    pcnet_common_cleanup(d);
}

static void pci_pcnet_uninit(PCIDevice *dev)
{
    PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev, dev);

    memory_region_destroy(&d->state.mmio);
    memory_region_destroy(&d->io_bar);
    qemu_del_timer(d->state.poll_timer);
    qemu_free_timer(d->state.poll_timer);
    qemu_del_net_client(&d->state.nic->nc);
}

static NetClientInfo net_pci_pcnet_info = {
    .type = NET_CLIENT_OPTIONS_KIND_NIC,
    .size = sizeof(NICState),
    .can_receive = pcnet_can_receive,
    .receive = pcnet_receive,
    .link_status_changed = pcnet_set_link_status,
    .cleanup = pci_pcnet_cleanup,
};

static int pci_pcnet_init(PCIDevice *pci_dev)
{
    PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev, pci_dev);
    PCNetState *s = &d->state;
    uint8_t *pci_conf;

#if 0
    printf("sizeof(RMD)=%d, sizeof(TMD)=%d\n",
        sizeof(struct pcnet_RMD), sizeof(struct pcnet_TMD));
#endif

    pci_conf = pci_dev->config;

    pci_set_word(pci_conf + PCI_STATUS,
                 PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);

    pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0);
    pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0);

    pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
    pci_conf[PCI_MIN_GNT] = 0x06;
    pci_conf[PCI_MAX_LAT] = 0xff;

    /* Handler for memory-mapped I/O */
    memory_region_init_io(&d->state.mmio, &pcnet_mmio_ops, s, "pcnet-mmio",
                          PCNET_PNPMMIO_SIZE);

    memory_region_init_io(&d->io_bar, &pcnet_io_ops, s, "pcnet-io",
                          PCNET_IOPORT_SIZE);
    pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar);

    pci_register_bar(pci_dev, 1, 0, &s->mmio);

    s->irq = pci_dev->irq[0];
    s->phys_mem_read = pci_physical_memory_read;
    s->phys_mem_write = pci_physical_memory_write;
    s->dma_opaque = pci_dev;

    return pcnet_common_init(&pci_dev->qdev, s, &net_pci_pcnet_info);
}

static void pci_reset(DeviceState *dev)
{
    PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev.qdev, dev);

    pcnet_h_reset(&d->state);
}

static Property pcnet_properties[] = {
    DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf),
    DEFINE_PROP_END_OF_LIST(),
};

static void pcnet_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

    k->init = pci_pcnet_init;
    k->exit = pci_pcnet_uninit;
    k->romfile = "pxe-pcnet.rom",
    k->vendor_id = PCI_VENDOR_ID_AMD;
    k->device_id = PCI_DEVICE_ID_AMD_LANCE;
    k->revision = 0x10;
    k->class_id = PCI_CLASS_NETWORK_ETHERNET;
    dc->reset = pci_reset;
    dc->vmsd = &vmstate_pci_pcnet;
    dc->props = pcnet_properties;
}

static TypeInfo pcnet_info = {
    .name          = "pcnet",
    .parent        = TYPE_PCI_DEVICE,
    .instance_size = sizeof(PCIPCNetState),
    .class_init    = pcnet_class_init,
};

static void pci_pcnet_register_types(void)
{
    type_register_static(&pcnet_info);
}

type_init(pci_pcnet_register_types)