aboutsummaryrefslogtreecommitdiff
path: root/hw/misc/pci-testdev.c
blob: 71ce5a3e0836d8b7343ee432c20b72c22b29e800 (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
/*
 * QEMU PCI test device
 *
 * Copyright (c) 2012 Red Hat Inc.
 * Author: Michael S. Tsirkin <mst@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 */
#include "hw/hw.h"
#include "hw/pci/pci.h"
#include "qemu/event_notifier.h"
#include "qemu/osdep.h"

typedef struct PCITestDevHdr {
    uint8_t test;
    uint8_t width;
    uint8_t pad0[2];
    uint32_t offset;
    uint8_t data;
    uint8_t pad1[3];
    uint32_t count;
    uint8_t name[];
} PCITestDevHdr;

typedef struct IOTest {
    MemoryRegion *mr;
    EventNotifier notifier;
    bool hasnotifier;
    unsigned size;
    bool match_data;
    PCITestDevHdr *hdr;
    unsigned bufsize;
} IOTest;

#define IOTEST_DATAMATCH 0xFA
#define IOTEST_NOMATCH   0xCE

#define IOTEST_IOSIZE 128
#define IOTEST_MEMSIZE 2048

static const char *iotest_test[] = {
    "no-eventfd",
    "wildcard-eventfd",
    "datamatch-eventfd"
};

static const char *iotest_type[] = {
    "mmio",
    "portio"
};

#define IOTEST_TEST(i) (iotest_test[((i) % ARRAY_SIZE(iotest_test))])
#define IOTEST_TYPE(i) (iotest_type[((i) / ARRAY_SIZE(iotest_test))])
#define IOTEST_MAX_TEST (ARRAY_SIZE(iotest_test))
#define IOTEST_MAX_TYPE (ARRAY_SIZE(iotest_type))
#define IOTEST_MAX (IOTEST_MAX_TEST * IOTEST_MAX_TYPE)

enum {
    IOTEST_ACCESS_NAME,
    IOTEST_ACCESS_DATA,
    IOTEST_ACCESS_MAX,
};

#define IOTEST_ACCESS_TYPE uint8_t
#define IOTEST_ACCESS_WIDTH (sizeof(uint8_t))

typedef struct PCITestDevState {
    PCIDevice dev;
    MemoryRegion mmio;
    MemoryRegion portio;
    IOTest *tests;
    int current;
} PCITestDevState;

#define IOTEST_IS_MEM(i) (strcmp(IOTEST_TYPE(i), "portio"))
#define IOTEST_REGION(d, i) (IOTEST_IS_MEM(i) ?  &(d)->mmio : &(d)->portio)
#define IOTEST_SIZE(i) (IOTEST_IS_MEM(i) ? IOTEST_MEMSIZE : IOTEST_IOSIZE)
#define IOTEST_PCI_BAR(i) (IOTEST_IS_MEM(i) ? PCI_BASE_ADDRESS_SPACE_MEMORY : \
                           PCI_BASE_ADDRESS_SPACE_IO)

static int pci_testdev_start(IOTest *test)
{
    test->hdr->count = 0;
    if (!test->hasnotifier) {
        return 0;
    }
    event_notifier_test_and_clear(&test->notifier);
    memory_region_add_eventfd(test->mr,
                              le32_to_cpu(test->hdr->offset),
                              test->size,
                              test->match_data,
                              test->hdr->data,
                              &test->notifier);
    return 0;
}

static void pci_testdev_stop(IOTest *test)
{
    if (!test->hasnotifier) {
        return;
    }
    memory_region_del_eventfd(test->mr,
                              le32_to_cpu(test->hdr->offset),
                              test->size,
                              test->match_data,
                              test->hdr->data,
                              &test->notifier);
}

static void
pci_testdev_reset(PCITestDevState *d)
{
    if (d->current == -1) {
        return;
    }
    pci_testdev_stop(&d->tests[d->current]);
    d->current = -1;
}

static void pci_testdev_inc(IOTest *test, unsigned inc)
{
    uint32_t c = le32_to_cpu(test->hdr->count);
    test->hdr->count = cpu_to_le32(c + inc);
}

static void
pci_testdev_write(void *opaque, hwaddr addr, uint64_t val,
                  unsigned size, int type)
{
    PCITestDevState *d = opaque;
    IOTest *test;
    int t, r;

    if (addr == offsetof(PCITestDevHdr, test)) {
        pci_testdev_reset(d);
        if (val >= IOTEST_MAX_TEST) {
            return;
        }
        t = type * IOTEST_MAX_TEST + val;
        r = pci_testdev_start(&d->tests[t]);
        if (r < 0) {
            return;
        }
        d->current = t;
        return;
    }
    if (d->current < 0) {
        return;
    }
    test = &d->tests[d->current];
    if (addr != le32_to_cpu(test->hdr->offset)) {
        return;
    }
    if (test->match_data && test->size != size) {
        return;
    }
    if (test->match_data && val != test->hdr->data) {
        return;
    }
    pci_testdev_inc(test, 1);
}

static uint64_t
pci_testdev_read(void *opaque, hwaddr addr, unsigned size)
{
    PCITestDevState *d = opaque;
    const char *buf;
    IOTest *test;
    if (d->current < 0) {
        return 0;
    }
    test = &d->tests[d->current];
    buf = (const char *)test->hdr;
    if (addr + size >= test->bufsize) {
        return 0;
    }
    if (test->hasnotifier) {
        event_notifier_test_and_clear(&test->notifier);
    }
    return buf[addr];
}

static void
pci_testdev_mmio_write(void *opaque, hwaddr addr, uint64_t val,
                       unsigned size)
{
    pci_testdev_write(opaque, addr, val, size, 0);
}

static void
pci_testdev_pio_write(void *opaque, hwaddr addr, uint64_t val,
                       unsigned size)
{
    pci_testdev_write(opaque, addr, val, size, 1);
}

static const MemoryRegionOps pci_testdev_mmio_ops = {
    .read = pci_testdev_read,
    .write = pci_testdev_mmio_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
    .impl = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
};

static const MemoryRegionOps pci_testdev_pio_ops = {
    .read = pci_testdev_read,
    .write = pci_testdev_pio_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
    .impl = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
};

static int pci_testdev_init(PCIDevice *pci_dev)
{
    PCITestDevState *d = DO_UPCAST(PCITestDevState, dev, pci_dev);
    uint8_t *pci_conf;
    char *name;
    int r, i;

    pci_conf = d->dev.config;

    pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */

    memory_region_init_io(&d->mmio, &pci_testdev_mmio_ops, d,
                          "pci-testdev-mmio", IOTEST_MEMSIZE * 2);
    memory_region_init_io(&d->portio, &pci_testdev_pio_ops, d,
                          "pci-testdev-portio", IOTEST_IOSIZE * 2);
    pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
    pci_register_bar(&d->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio);

    d->current = -1;
    d->tests = g_malloc0(IOTEST_MAX * sizeof *d->tests);
    for (i = 0; i < IOTEST_MAX; ++i) {
        IOTest *test = &d->tests[i];
        name = g_strdup_printf("%s-%s", IOTEST_TYPE(i), IOTEST_TEST(i));
        test->bufsize = sizeof(PCITestDevHdr) + strlen(name) + 1;
        test->hdr = g_malloc0(test->bufsize);
        memcpy(test->hdr->name, name, strlen(name) + 1);
        g_free(name);
        test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH);
        test->size = IOTEST_ACCESS_WIDTH;
        test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd");
        test->hdr->test = i;
        test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH;
        test->hdr->width = IOTEST_ACCESS_WIDTH;
        test->mr = IOTEST_REGION(d, i);
        if (!strcmp(IOTEST_TEST(i), "no-eventfd")) {
            test->hasnotifier = false;
            continue;
        }
        r = event_notifier_init(&test->notifier, 0);
        assert(r >= 0);
        test->hasnotifier = true;
    }

    return 0;
}

static void
pci_testdev_uninit(PCIDevice *dev)
{
    PCITestDevState *d = DO_UPCAST(PCITestDevState, dev, dev);
    int i;

    pci_testdev_reset(d);
    for (i = 0; i < IOTEST_MAX; ++i) {
        if (d->tests[i].hasnotifier) {
            event_notifier_cleanup(&d->tests[i].notifier);
        }
        g_free(d->tests[i].hdr);
    }
    g_free(d->tests);
    memory_region_destroy(&d->mmio);
    memory_region_destroy(&d->portio);
}

static void qdev_pci_testdev_reset(DeviceState *dev)
{
    PCITestDevState *d = DO_UPCAST(PCITestDevState, dev.qdev, dev);
    pci_testdev_reset(d);
}

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

    k->init = pci_testdev_init;
    k->exit = pci_testdev_uninit;
    k->vendor_id = PCI_VENDOR_ID_REDHAT;
    k->device_id = PCI_DEVICE_ID_REDHAT_TEST;
    k->revision = 0x00;
    k->class_id = PCI_CLASS_OTHERS;
    dc->desc = "PCI Test Device";
    dc->reset = qdev_pci_testdev_reset;
}

static const TypeInfo pci_testdev_info = {
    .name          = "pci-testdev",
    .parent        = TYPE_PCI_DEVICE,
    .instance_size = sizeof(PCITestDevState),
    .class_init    = pci_testdev_class_init,
};

static void pci_testdev_register_types(void)
{
    type_register_static(&pci_testdev_info);
}

type_init(pci_testdev_register_types)