summaryrefslogtreecommitdiff
path: root/hw/xfree86/common/xf86Bus.c
blob: 0263e690717d9d9afdaea96aa111ac623245caef (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
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
/*
 * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
 *
 * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Except as contained in this notice, the name of the copyright holder(s)
 * and author(s) shall not be used in advertising or otherwise to promote
 * the sale, use or other dealings in this Software without prior written
 * authorization from the copyright holder(s) and author(s).
 */

/*
 * This file contains the interfaces to the bus-specific code
 */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <X11/X.h>
#include "os.h"
#include "xf86.h"
#include "xf86Priv.h"

/* Bus-specific headers */

#include "xf86Bus.h"

#define XF86_OS_PRIVS
#include "xf86_OSproc.h"
#ifdef XSERVER_LIBPCIACCESS
#include "xf86VGAarbiter.h"
#endif
/* Entity data */
EntityPtr *xf86Entities = NULL; /* Bus slots claimed by drivers */
int xf86NumEntities = 0;
static int xf86EntityPrivateCount = 0;

BusRec primaryBus = { BUS_NONE, {0} };

/**
 * Call the driver's correct probe function.
 *
 * If the driver implements the \c DriverRec::PciProbe entry-point and an
 * appropriate PCI device (with matching Device section in the xorg.conf file)
 * is found, it is called.  If \c DriverRec::PciProbe or no devices can be
 * successfully probed with it (e.g., only non-PCI devices are available),
 * the driver's \c DriverRec::Probe function is called.
 *
 * \param drv   Driver to probe
 *
 * \return
 * If a device can be successfully probed by the driver, \c TRUE is
 * returned.  Otherwise, \c FALSE is returned.
 */
Bool
xf86CallDriverProbe(DriverPtr drv, Bool detect_only)
{
    Bool foundScreen = FALSE;

#ifdef XSERVER_PLATFORM_BUS
    /* xf86platformBus.c does not support Xorg -configure */
    if (!xf86DoConfigure && drv->platformProbe != NULL) {
        foundScreen = xf86platformProbeDev(drv);
    }
#endif

#ifdef XSERVER_LIBPCIACCESS
    if (!foundScreen && (drv->PciProbe != NULL)) {
        if (xf86DoConfigure && xf86DoConfigurePass1) {
            assert(detect_only);
            foundScreen = xf86PciAddMatchingDev(drv);
        }
        else {
            assert(!detect_only);
            foundScreen = xf86PciProbeDev(drv);
        }
    }
#endif
    if (!foundScreen && (drv->Probe != NULL)) {
        xf86Msg(X_WARNING, "Falling back to old probe method for %s\n",
                drv->driverName);
        foundScreen = (*drv->Probe) (drv, (detect_only) ? PROBE_DETECT
                                     : PROBE_DEFAULT);
    }

    return foundScreen;
}

/**
 * @return TRUE if all buses are configured and set up correctly and FALSE
 * otherwise.
 */
Bool
xf86BusConfig(void)
{
    screenLayoutPtr layout;
    int i, j;

    /*
     * 3 step probe to (hopefully) ensure that we always find at least 1
     * (non GPU) screen:
     *
     * 1. Call each drivers probe function normally,
     *    Each successful probe will result in an extra entry added to the
     *    xf86Screens[] list for each instance of the hardware found.
     */
    for (i = 0; i < xf86NumDrivers; i++) {
        xf86CallDriverProbe(xf86DriverList[i], FALSE);
    }

    /*
     * 2. If no Screens were found, call each drivers probe function with
     *    ignorePrimary = TRUE, to ensure that we do actually get a
     *    Screen if there is at least one supported video card.
     */
    if (xf86NumScreens == 0) {
        xf86ProbeIgnorePrimary = TRUE;
        for (i = 0; i < xf86NumDrivers && xf86NumScreens == 0; i++) {
            xf86CallDriverProbe(xf86DriverList[i], FALSE);
        }
        xf86ProbeIgnorePrimary = FALSE;
    }

    /*
     * 3. Call xf86platformAddGPUDevices() to add any additional video cards as
     *    GPUScreens (GPUScreens are only supported by platformBus drivers).
     */
    for (i = 0; i < xf86NumDrivers; i++) {
        xf86platformAddGPUDevices(xf86DriverList[i]);
    }

    /* If nothing was detected, return now */
    if (xf86NumScreens == 0) {
        xf86Msg(X_ERROR, "No devices detected.\n");
        return FALSE;
    }

    xf86VGAarbiterInit();

    /*
     * Match up the screens found by the probes against those specified
     * in the config file.  Remove the ones that won't be used.  Sort
     * them in the order specified.
     *
     * What is the best way to do this?
     *
     * For now, go through the screens allocated by the probes, and
     * look for screen config entry which refers to the same device
     * section as picked out by the probe.
     *
     */
    for (i = 0; i < xf86NumScreens; i++) {
        for (layout = xf86ConfigLayout.screens; layout->screen != NULL;
             layout++) {
            Bool found = FALSE;

            for (j = 0; j < xf86Screens[i]->numEntities; j++) {

                GDevPtr dev =
                    xf86GetDevFromEntity(xf86Screens[i]->entityList[j],
                                         xf86Screens[i]->entityInstanceList[j]);

                if (dev == layout->screen->device) {
                    /* A match has been found */
                    xf86Screens[i]->confScreen = layout->screen;
                    found = TRUE;
                    break;
                }
            }
            if (found)
                break;
        }
        if (layout->screen == NULL) {
            /* No match found */
            xf86Msg(X_ERROR,
                    "Screen %d deleted because of no matching config section.\n",
                    i);
            xf86DeleteScreen(xf86Screens[i--]);
        }
    }

    /* bind GPU conf screen to protocol screen 0 */
    for (i = 0; i < xf86NumGPUScreens; i++)
        xf86GPUScreens[i]->confScreen = xf86Screens[0]->confScreen;

    /* If no screens left, return now.  */
    if (xf86NumScreens == 0) {
        xf86Msg(X_ERROR,
                "Device(s) detected, but none match those in the config file.\n");
        return FALSE;
    }

    return TRUE;
}

/*
 * Call the bus probes relevant to the architecture.
 *
 * The only one available so far is for PCI and SBUS.
 */

void
xf86BusProbe(void)
{
#ifdef XSERVER_PLATFORM_BUS
    xf86platformProbe();
    if (ServerIsNotSeat0() && xf86_num_platform_devices > 0)
        return;
#endif
#ifdef XSERVER_LIBPCIACCESS
    xf86PciProbe();
#endif
#if (defined(__sparc__) || defined(__sparc)) && !defined(__OpenBSD__)
    xf86SbusProbe();
#endif
#ifdef XSERVER_PLATFORM_BUS
    xf86platformPrimary();
#endif
}

/*
 * Determine what bus type the busID string represents.  The start of the
 * bus-dependent part of the string is returned as retID.
 */

BusType
StringToBusType(const char *busID, const char **retID)
{
    char *p, *s;
    BusType ret = BUS_NONE;

    /* If no type field, Default to PCI */
    if (isdigit(busID[0])) {
        if (retID)
            *retID = busID;
        return BUS_PCI;
    }

    s = xstrdup(busID);
    p = strtok(s, ":");
    if (p == NULL || *p == 0) {
        free(s);
        return BUS_NONE;
    }
    if (!xf86NameCmp(p, "pci") || !xf86NameCmp(p, "agp"))
        ret = BUS_PCI;
    if (!xf86NameCmp(p, "sbus"))
        ret = BUS_SBUS;
    if (!xf86NameCmp(p, "platform"))
        ret = BUS_PLATFORM;
    if (ret != BUS_NONE)
        if (retID)
            *retID = busID + strlen(p) + 1;
    free(s);
    return ret;
}

int
xf86AllocateEntity(void)
{
    xf86NumEntities++;
    xf86Entities = xnfreallocarray(xf86Entities,
                                   xf86NumEntities, sizeof(EntityPtr));
    xf86Entities[xf86NumEntities - 1] = xnfcalloc(1, sizeof(EntityRec));
    xf86Entities[xf86NumEntities - 1]->entityPrivates =
        xnfcalloc(xf86EntityPrivateCount, sizeof(DevUnion));
    return xf86NumEntities - 1;
}

Bool
xf86IsEntityPrimary(int entityIndex)
{
    EntityPtr pEnt = xf86Entities[entityIndex];

#ifdef XSERVER_LIBPCIACCESS
    if (primaryBus.type == BUS_PLATFORM && pEnt->bus.type == BUS_PCI)
	return MATCH_PCI_DEVICES(pEnt->bus.id.pci, primaryBus.id.plat->pdev);
#endif

    if (primaryBus.type != pEnt->bus.type)
        return FALSE;

    switch (pEnt->bus.type) {
    case BUS_PCI:
        return pEnt->bus.id.pci == primaryBus.id.pci;
    case BUS_SBUS:
        return pEnt->bus.id.sbus.fbNum == primaryBus.id.sbus.fbNum;
    case BUS_PLATFORM:
        return pEnt->bus.id.plat == primaryBus.id.plat;
    default:
        return FALSE;
    }
}

Bool
xf86DriverHasEntities(DriverPtr drvp)
{
    int i;

    for (i = 0; i < xf86NumEntities; i++) {
        if (xf86Entities[i]->driver == drvp)
            return TRUE;
    }
    return FALSE;
}

void
xf86AddEntityToScreen(ScrnInfoPtr pScrn, int entityIndex)
{
    if (entityIndex == -1)
        return;
    if (xf86Entities[entityIndex]->inUse &&
        !(xf86Entities[entityIndex]->entityProp & IS_SHARED_ACCEL)) {
        ErrorF("Requested Entity already in use!\n");
        return;
    }

    pScrn->numEntities++;
    pScrn->entityList = xnfreallocarray(pScrn->entityList,
                                        pScrn->numEntities, sizeof(int));
    pScrn->entityList[pScrn->numEntities - 1] = entityIndex;
    xf86Entities[entityIndex]->inUse = TRUE;
    pScrn->entityInstanceList = xnfreallocarray(pScrn->entityInstanceList,
                                                pScrn->numEntities,
                                                sizeof(int));
    pScrn->entityInstanceList[pScrn->numEntities - 1] = 0;
}

void
xf86SetEntityInstanceForScreen(ScrnInfoPtr pScrn, int entityIndex, int instance)
{
    int i;

    if (entityIndex == -1 || entityIndex >= xf86NumEntities)
        return;

    for (i = 0; i < pScrn->numEntities; i++) {
        if (pScrn->entityList[i] == entityIndex) {
            pScrn->entityInstanceList[i] = instance;
            break;
        }
    }
}

/*
 * XXX  This needs to be updated for the case where a single entity may have
 * instances associated with more than one screen.
 */
ScrnInfoPtr
xf86FindScreenForEntity(int entityIndex)
{
    int i, j;

    if (entityIndex == -1)
        return NULL;

    if (xf86Screens) {
        for (i = 0; i < xf86NumScreens; i++) {
            for (j = 0; j < xf86Screens[i]->numEntities; j++) {
                if (xf86Screens[i]->entityList[j] == entityIndex)
                    return xf86Screens[i];
            }
        }
    }
    return NULL;
}

void
xf86RemoveEntityFromScreen(ScrnInfoPtr pScrn, int entityIndex)
{
    int i;

    for (i = 0; i < pScrn->numEntities; i++) {
        if (pScrn->entityList[i] == entityIndex) {
            for (i++; i < pScrn->numEntities; i++)
                pScrn->entityList[i - 1] = pScrn->entityList[i];
            pScrn->numEntities--;
            xf86Entities[entityIndex]->inUse = FALSE;
            break;
        }
    }
}

/*
 * xf86ClearEntityListForScreen() - called when a screen is deleted
 * to mark its entities unused. Called by xf86DeleteScreen().
 */
void
xf86ClearEntityListForScreen(ScrnInfoPtr pScrn)
{
    int i, entityIndex;

    if (pScrn->entityList == NULL || pScrn->numEntities == 0)
        return;

    for (i = 0; i < pScrn->numEntities; i++) {
        entityIndex = pScrn->entityList[i];
        xf86Entities[entityIndex]->inUse = FALSE;
        /* disable resource: call the disable function */
    }
    free(pScrn->entityList);
    free(pScrn->entityInstanceList);
    pScrn->entityList = NULL;
    pScrn->entityInstanceList = NULL;
}

/*
 * Add an extra device section (GDevPtr) to an entity.
 */

void
xf86AddDevToEntity(int entityIndex, GDevPtr dev)
{
    EntityPtr pEnt;

    if (entityIndex >= xf86NumEntities)
        return;

    pEnt = xf86Entities[entityIndex];
    pEnt->numInstances++;
    pEnt->devices = xnfreallocarray(pEnt->devices,
                                    pEnt->numInstances, sizeof(GDevPtr));
    pEnt->devices[pEnt->numInstances - 1] = dev;
    dev->claimed = TRUE;
}


void
xf86RemoveDevFromEntity(int entityIndex, GDevPtr dev)
{
    EntityPtr pEnt;
    int i, j;
    if (entityIndex >= xf86NumEntities)
        return;

    pEnt = xf86Entities[entityIndex];
    for (i = 0; i < pEnt->numInstances; i++) {
        if (pEnt->devices[i] == dev) {
            for (j = i; j < pEnt->numInstances - 1; j++)
                pEnt->devices[j] = pEnt->devices[j + 1];
            break;
        }
    }
    pEnt->numInstances--;
    dev->claimed = FALSE;
}
/*
 * xf86GetEntityInfo() -- This function hands information from the
 * EntityRec struct to the drivers. The EntityRec structure itself
 * remains invisible to the driver.
 */
EntityInfoPtr
xf86GetEntityInfo(int entityIndex)
{
    EntityInfoPtr pEnt;
    int i;

    if (entityIndex == -1)
        return NULL;

    if (entityIndex >= xf86NumEntities)
        return NULL;

    pEnt = xnfcalloc(1, sizeof(EntityInfoRec));
    pEnt->index = entityIndex;
    pEnt->location = xf86Entities[entityIndex]->bus;
    pEnt->active = xf86Entities[entityIndex]->active;
    pEnt->chipset = xf86Entities[entityIndex]->chipset;
    pEnt->driver = xf86Entities[entityIndex]->driver;
    if ((xf86Entities[entityIndex]->devices) &&
        (xf86Entities[entityIndex]->devices[0])) {
        for (i = 0; i < xf86Entities[entityIndex]->numInstances; i++)
            if (xf86Entities[entityIndex]->devices[i]->screen == 0)
                break;
        pEnt->device = xf86Entities[entityIndex]->devices[i];
    }
    else
        pEnt->device = NULL;

    return pEnt;
}

int
xf86GetNumEntityInstances(int entityIndex)
{
    if (entityIndex >= xf86NumEntities)
        return -1;

    return xf86Entities[entityIndex]->numInstances;
}

GDevPtr
xf86GetDevFromEntity(int entityIndex, int instance)
{
    int i;

    /* We might not use AddDevtoEntity */
    if ((!xf86Entities[entityIndex]->devices) ||
        (!xf86Entities[entityIndex]->devices[0]))
        return NULL;

    if (entityIndex >= xf86NumEntities ||
        instance >= xf86Entities[entityIndex]->numInstances)
        return NULL;

    for (i = 0; i < xf86Entities[entityIndex]->numInstances; i++)
        if (xf86Entities[entityIndex]->devices[i]->screen == instance)
            break;
    return xf86Entities[entityIndex]->devices[i];
}

/*
 * xf86PostProbe() -- Allocate all non conflicting resources
 * This function gets called by xf86Init().
 */
void
xf86PostProbe(void)
{
    if (fbSlotClaimed && (
#if (defined(__sparc__) || defined(__sparc)) && !defined(__OpenBSD__)
                             sbusSlotClaimed ||
#endif
#ifdef XSERVER_PLATFORM_BUS
                             platformSlotClaimed ||
#endif
#ifdef XSERVER_LIBPCIACCESS
                             pciSlotClaimed
#else
                             TRUE
#endif
        ))
        FatalError("Cannot run in framebuffer mode. Please specify busIDs "
                   "       for all framebuffer devices\n");
}

Bool
xf86IsEntityShared(int entityIndex)
{
    if (entityIndex < xf86NumEntities) {
        if (xf86Entities[entityIndex]->entityProp & IS_SHARED_ACCEL) {
            return TRUE;
        }
    }
    return FALSE;
}

void
xf86SetEntityShared(int entityIndex)
{
    if (entityIndex < xf86NumEntities) {
        xf86Entities[entityIndex]->entityProp |= IS_SHARED_ACCEL;
    }
}

Bool
xf86IsEntitySharable(int entityIndex)
{
    if (entityIndex < xf86NumEntities) {
        if (xf86Entities[entityIndex]->entityProp & ACCEL_IS_SHARABLE) {
            return TRUE;
        }
    }
    return FALSE;
}

void
xf86SetEntitySharable(int entityIndex)
{
    if (entityIndex < xf86NumEntities) {
        xf86Entities[entityIndex]->entityProp |= ACCEL_IS_SHARABLE;
    }
}

Bool
xf86IsPrimInitDone(int entityIndex)
{
    if (entityIndex < xf86NumEntities) {
        if (xf86Entities[entityIndex]->entityProp & SA_PRIM_INIT_DONE) {
            return TRUE;
        }
    }
    return FALSE;
}

void
xf86SetPrimInitDone(int entityIndex)
{
    if (entityIndex < xf86NumEntities) {
        xf86Entities[entityIndex]->entityProp |= SA_PRIM_INIT_DONE;
    }
}

void
xf86ClearPrimInitDone(int entityIndex)
{
    if (entityIndex < xf86NumEntities) {
        xf86Entities[entityIndex]->entityProp &= ~SA_PRIM_INIT_DONE;
    }
}

/*
 * Allocate a private in the entities.
 */

int
xf86AllocateEntityPrivateIndex(void)
{
    int idx, i;
    EntityPtr pEnt;
    DevUnion *nprivs;

    idx = xf86EntityPrivateCount++;
    for (i = 0; i < xf86NumEntities; i++) {
        pEnt = xf86Entities[i];
        nprivs = xnfreallocarray(pEnt->entityPrivates,
                                 xf86EntityPrivateCount, sizeof(DevUnion));
        /* Zero the new private */
        memset(&nprivs[idx], 0, sizeof(DevUnion));
        pEnt->entityPrivates = nprivs;
    }
    return idx;
}

DevUnion *
xf86GetEntityPrivate(int entityIndex, int privIndex)
{
    if (entityIndex >= xf86NumEntities || privIndex >= xf86EntityPrivateCount)
        return NULL;

    return &(xf86Entities[entityIndex]->entityPrivates[privIndex]);
}