aboutsummaryrefslogtreecommitdiff
path: root/hw/nvram/fw_cfg.c
blob: 8e3911136089dcec25be1aafb322b5ca423fe0fe (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
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
/*
 * QEMU Firmware configuration device emulation
 *
 * Copyright (c) 2008 Gleb Natapov
 *
 * 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.
 */
#include "hw/hw.h"
#include "sysemu/sysemu.h"
#include "hw/isa/isa.h"
#include "hw/nvram/fw_cfg.h"
#include "hw/sysbus.h"
#include "trace.h"
#include "qemu/error-report.h"
#include "qemu/config-file.h"

#define FW_CFG_SIZE 2
#define FW_CFG_DATA_SIZE 1
#define TYPE_FW_CFG "fw_cfg"
#define FW_CFG_NAME "fw_cfg"
#define FW_CFG_PATH "/machine/" FW_CFG_NAME
#define FW_CFG(obj) OBJECT_CHECK(FWCfgState, (obj), TYPE_FW_CFG)

typedef struct FWCfgEntry {
    uint32_t len;
    uint8_t *data;
    void *callback_opaque;
    FWCfgCallback callback;
} FWCfgEntry;

struct FWCfgState {
    /*< private >*/
    SysBusDevice parent_obj;
    /*< public >*/

    MemoryRegion ctl_iomem, data_iomem, comb_iomem;
    uint32_t ctl_iobase, data_iobase;
    FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
    FWCfgFiles *files;
    uint16_t cur_entry;
    uint32_t cur_offset;
    Notifier machine_ready;
};

#define JPG_FILE 0
#define BMP_FILE 1

static char *read_splashfile(char *filename, gsize *file_sizep,
                             int *file_typep)
{
    GError *err = NULL;
    gboolean res;
    gchar *content;
    int file_type;
    unsigned int filehead;
    int bmp_bpp;

    res = g_file_get_contents(filename, &content, file_sizep, &err);
    if (res == FALSE) {
        error_report("failed to read splash file '%s'", filename);
        g_error_free(err);
        return NULL;
    }

    /* check file size */
    if (*file_sizep < 30) {
        goto error;
    }

    /* check magic ID */
    filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff;
    if (filehead == 0xd8ff) {
        file_type = JPG_FILE;
    } else if (filehead == 0x4d42) {
        file_type = BMP_FILE;
    } else {
        goto error;
    }

    /* check BMP bpp */
    if (file_type == BMP_FILE) {
        bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff;
        if (bmp_bpp != 24) {
            goto error;
        }
    }

    /* return values */
    *file_typep = file_type;

    return content;

error:
    error_report("splash file '%s' format not recognized; must be JPEG "
                 "or 24 bit BMP", filename);
    g_free(content);
    return NULL;
}

static void fw_cfg_bootsplash(FWCfgState *s)
{
    int boot_splash_time = -1;
    const char *boot_splash_filename = NULL;
    char *p;
    char *filename, *file_data;
    gsize file_size;
    int file_type;
    const char *temp;

    /* get user configuration */
    QemuOptsList *plist = qemu_find_opts("boot-opts");
    QemuOpts *opts = QTAILQ_FIRST(&plist->head);
    if (opts != NULL) {
        temp = qemu_opt_get(opts, "splash");
        if (temp != NULL) {
            boot_splash_filename = temp;
        }
        temp = qemu_opt_get(opts, "splash-time");
        if (temp != NULL) {
            p = (char *)temp;
            boot_splash_time = strtol(p, (char **)&p, 10);
        }
    }

    /* insert splash time if user configurated */
    if (boot_splash_time >= 0) {
        /* validate the input */
        if (boot_splash_time > 0xffff) {
            error_report("splash time is big than 65535, force it to 65535.");
            boot_splash_time = 0xffff;
        }
        /* use little endian format */
        qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
        qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
        fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
    }

    /* insert splash file if user configurated */
    if (boot_splash_filename != NULL) {
        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
        if (filename == NULL) {
            error_report("failed to find file '%s'.", boot_splash_filename);
            return;
        }

        /* loading file data */
        file_data = read_splashfile(filename, &file_size, &file_type);
        if (file_data == NULL) {
            g_free(filename);
            return;
        }
        if (boot_splash_filedata != NULL) {
            g_free(boot_splash_filedata);
        }
        boot_splash_filedata = (uint8_t *)file_data;
        boot_splash_filedata_size = file_size;

        /* insert data */
        if (file_type == JPG_FILE) {
            fw_cfg_add_file(s, "bootsplash.jpg",
                    boot_splash_filedata, boot_splash_filedata_size);
        } else {
            fw_cfg_add_file(s, "bootsplash.bmp",
                    boot_splash_filedata, boot_splash_filedata_size);
        }
        g_free(filename);
    }
}

static void fw_cfg_reboot(FWCfgState *s)
{
    int reboot_timeout = -1;
    char *p;
    const char *temp;

    /* get user configuration */
    QemuOptsList *plist = qemu_find_opts("boot-opts");
    QemuOpts *opts = QTAILQ_FIRST(&plist->head);
    if (opts != NULL) {
        temp = qemu_opt_get(opts, "reboot-timeout");
        if (temp != NULL) {
            p = (char *)temp;
            reboot_timeout = strtol(p, (char **)&p, 10);
        }
    }
    /* validate the input */
    if (reboot_timeout > 0xffff) {
        error_report("reboot timeout is larger than 65535, force it to 65535.");
        reboot_timeout = 0xffff;
    }
    fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
}

static void fw_cfg_write(FWCfgState *s, uint8_t value)
{
    int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
    FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];

    trace_fw_cfg_write(s, value);

    if (s->cur_entry & FW_CFG_WRITE_CHANNEL && e->callback &&
        s->cur_offset < e->len) {
        e->data[s->cur_offset++] = value;
        if (s->cur_offset == e->len) {
            e->callback(e->callback_opaque, e->data);
            s->cur_offset = 0;
        }
    }
}

static int fw_cfg_select(FWCfgState *s, uint16_t key)
{
    int ret;

    s->cur_offset = 0;
    if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
        s->cur_entry = FW_CFG_INVALID;
        ret = 0;
    } else {
        s->cur_entry = key;
        ret = 1;
    }

    trace_fw_cfg_select(s, key, ret);
    return ret;
}

static uint8_t fw_cfg_read(FWCfgState *s)
{
    int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
    FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
    uint8_t ret;

    if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
        ret = 0;
    else
        ret = e->data[s->cur_offset++];

    trace_fw_cfg_read(s, ret);
    return ret;
}

static uint64_t fw_cfg_data_mem_read(void *opaque, hwaddr addr,
                                     unsigned size)
{
    return fw_cfg_read(opaque);
}

static void fw_cfg_data_mem_write(void *opaque, hwaddr addr,
                                  uint64_t value, unsigned size)
{
    fw_cfg_write(opaque, (uint8_t)value);
}

static void fw_cfg_ctl_mem_write(void *opaque, hwaddr addr,
                                 uint64_t value, unsigned size)
{
    fw_cfg_select(opaque, (uint16_t)value);
}

static bool fw_cfg_ctl_mem_valid(void *opaque, hwaddr addr,
                                 unsigned size, bool is_write)
{
    return is_write && size == 2;
}

static uint64_t fw_cfg_comb_read(void *opaque, hwaddr addr,
                                 unsigned size)
{
    return fw_cfg_read(opaque);
}

static void fw_cfg_comb_write(void *opaque, hwaddr addr,
                              uint64_t value, unsigned size)
{
    switch (size) {
    case 1:
        fw_cfg_write(opaque, (uint8_t)value);
        break;
    case 2:
        fw_cfg_select(opaque, (uint16_t)value);
        break;
    }
}

static bool fw_cfg_comb_valid(void *opaque, hwaddr addr,
                                  unsigned size, bool is_write)
{
    return (size == 1) || (is_write && size == 2);
}

static const MemoryRegionOps fw_cfg_ctl_mem_ops = {
    .write = fw_cfg_ctl_mem_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .valid.accepts = fw_cfg_ctl_mem_valid,
};

static const MemoryRegionOps fw_cfg_data_mem_ops = {
    .read = fw_cfg_data_mem_read,
    .write = fw_cfg_data_mem_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .valid = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
};

static const MemoryRegionOps fw_cfg_comb_mem_ops = {
    .read = fw_cfg_comb_read,
    .write = fw_cfg_comb_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .valid.accepts = fw_cfg_comb_valid,
};

static void fw_cfg_reset(DeviceState *d)
{
    FWCfgState *s = FW_CFG(d);

    fw_cfg_select(s, 0);
}

/* Save restore 32 bit int as uint16_t
   This is a Big hack, but it is how the old state did it.
   Or we broke compatibility in the state, or we can't use struct tm
 */

static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
{
    uint32_t *v = pv;
    *v = qemu_get_be16(f);
    return 0;
}

static void put_unused(QEMUFile *f, void *pv, size_t size)
{
    fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
    fprintf(stderr, "This functions shouldn't be called.\n");
}

static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
    .name = "int32_as_uint16",
    .get  = get_uint32_as_uint16,
    .put  = put_unused,
};

#define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
    VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)


static bool is_version_1(void *opaque, int version_id)
{
    return version_id == 1;
}

static const VMStateDescription vmstate_fw_cfg = {
    .name = "fw_cfg",
    .version_id = 2,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField []) {
        VMSTATE_UINT16(cur_entry, FWCfgState),
        VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
        VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
        VMSTATE_END_OF_LIST()
    }
};

void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len)
{
    int arch = !!(key & FW_CFG_ARCH_LOCAL);

    key &= FW_CFG_ENTRY_MASK;

    assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX);

    s->entries[arch][key].data = data;
    s->entries[arch][key].len = (uint32_t)len;
}

void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value)
{
    size_t sz = strlen(value) + 1;

    return fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
}

void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
{
    uint16_t *copy;

    copy = g_malloc(sizeof(value));
    *copy = cpu_to_le16(value);
    fw_cfg_add_bytes(s, key, copy, sizeof(value));
}

void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
{
    uint32_t *copy;

    copy = g_malloc(sizeof(value));
    *copy = cpu_to_le32(value);
    fw_cfg_add_bytes(s, key, copy, sizeof(value));
}

void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
{
    uint64_t *copy;

    copy = g_malloc(sizeof(value));
    *copy = cpu_to_le64(value);
    fw_cfg_add_bytes(s, key, copy, sizeof(value));
}

void fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
                         void *callback_opaque, void *data, size_t len)
{
    int arch = !!(key & FW_CFG_ARCH_LOCAL);

    assert(key & FW_CFG_WRITE_CHANNEL);

    key &= FW_CFG_ENTRY_MASK;

    assert(key < FW_CFG_MAX_ENTRY && len <= UINT32_MAX);

    s->entries[arch][key].data = data;
    s->entries[arch][key].len = (uint32_t)len;
    s->entries[arch][key].callback_opaque = callback_opaque;
    s->entries[arch][key].callback = callback;
}

void fw_cfg_add_file(FWCfgState *s,  const char *filename,
                     void *data, size_t len)
{
    int i, index;
    size_t dsize;

    if (!s->files) {
        dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
        s->files = g_malloc0(dsize);
        fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, s->files, dsize);
    }

    index = be32_to_cpu(s->files->count);
    assert(index < FW_CFG_FILE_SLOTS);

    fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + index, data, len);

    pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
            filename);
    for (i = 0; i < index; i++) {
        if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
            trace_fw_cfg_add_file_dupe(s, s->files->f[index].name);
            return;
        }
    }

    s->files->f[index].size   = cpu_to_be32(len);
    s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
    trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);

    s->files->count = cpu_to_be32(index+1);
}

static void fw_cfg_machine_ready(struct Notifier *n, void *data)
{
    size_t len;
    FWCfgState *s = container_of(n, FWCfgState, machine_ready);
    char *bootindex = get_boot_devices_list(&len);

    fw_cfg_add_file(s, "bootorder", (uint8_t*)bootindex, len);
}

FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
                        hwaddr ctl_addr, hwaddr data_addr)
{
    DeviceState *dev;
    SysBusDevice *d;
    FWCfgState *s;

    dev = qdev_create(NULL, TYPE_FW_CFG);
    qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
    qdev_prop_set_uint32(dev, "data_iobase", data_port);
    d = SYS_BUS_DEVICE(dev);

    s = FW_CFG(dev);

    assert(!object_resolve_path(FW_CFG_PATH, NULL));

    object_property_add_child(qdev_get_machine(), FW_CFG_NAME, OBJECT(s), NULL);

    qdev_init_nofail(dev);

    if (ctl_addr) {
        sysbus_mmio_map(d, 0, ctl_addr);
    }
    if (data_addr) {
        sysbus_mmio_map(d, 1, data_addr);
    }
    fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4);
    fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
    fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
    fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
    fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
    fw_cfg_bootsplash(s);
    fw_cfg_reboot(s);

    s->machine_ready.notify = fw_cfg_machine_ready;
    qemu_add_machine_init_done_notifier(&s->machine_ready);

    return s;
}

static int fw_cfg_init1(SysBusDevice *dev)
{
    FWCfgState *s = FW_CFG(dev);

    memory_region_init_io(&s->ctl_iomem, OBJECT(s), &fw_cfg_ctl_mem_ops, s,
                          "fwcfg.ctl", FW_CFG_SIZE);
    sysbus_init_mmio(dev, &s->ctl_iomem);
    memory_region_init_io(&s->data_iomem, OBJECT(s), &fw_cfg_data_mem_ops, s,
                          "fwcfg.data", FW_CFG_DATA_SIZE);
    sysbus_init_mmio(dev, &s->data_iomem);
    /* In case ctl and data overlap: */
    memory_region_init_io(&s->comb_iomem, OBJECT(s), &fw_cfg_comb_mem_ops, s,
                          "fwcfg", FW_CFG_SIZE);

    if (s->ctl_iobase + 1 == s->data_iobase) {
        sysbus_add_io(dev, s->ctl_iobase, &s->comb_iomem);
    } else {
        if (s->ctl_iobase) {
            sysbus_add_io(dev, s->ctl_iobase, &s->ctl_iomem);
        }
        if (s->data_iobase) {
            sysbus_add_io(dev, s->data_iobase, &s->data_iomem);
        }
    }
    return 0;
}

static Property fw_cfg_properties[] = {
    DEFINE_PROP_HEX32("ctl_iobase", FWCfgState, ctl_iobase, -1),
    DEFINE_PROP_HEX32("data_iobase", FWCfgState, data_iobase, -1),
    DEFINE_PROP_END_OF_LIST(),
};

FWCfgState *fw_cfg_find(void)
{
    return FW_CFG(object_resolve_path(FW_CFG_PATH, NULL));
}

static void fw_cfg_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = fw_cfg_init1;
    dc->no_user = 1;
    dc->reset = fw_cfg_reset;
    dc->vmsd = &vmstate_fw_cfg;
    dc->props = fw_cfg_properties;
}

static const TypeInfo fw_cfg_info = {
    .name          = TYPE_FW_CFG,
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(FWCfgState),
    .class_init    = fw_cfg_class_init,
};

static void fw_cfg_register_types(void)
{
    type_register_static(&fw_cfg_info);
}

type_init(fw_cfg_register_types)