rsdBcc.cpp revision dbe66d6783c1e53cd1572de0ef6ef6fdf6f76f48 
1/*
2 * Copyright (C) 2011-2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "rsdCore.h"
18
19#include <bcc/BCCContext.h>
20#include <bcc/Renderscript/RSCompilerDriver.h>
21#include <bcc/Renderscript/RSExecutable.h>
22#include <bcc/Renderscript/RSInfo.h>
23
24#include "rsdBcc.h"
25#include "rsdRuntime.h"
26#include "rsdAllocation.h"
27#include "rsdIntrinsics.h"
28
29#include "rsContext.h"
30#include "rsElement.h"
31#include "rsScriptC.h"
32
33#include "utils/Vector.h"
34#include "utils/Timers.h"
35#include "utils/StopWatch.h"
36
37using namespace android;
38using namespace android::renderscript;
39
40
41static Script * setTLS(Script *sc) {
42    ScriptTLSStruct * tls = (ScriptTLSStruct *)pthread_getspecific(rsdgThreadTLSKey);
43    rsAssert(tls);
44    Script *old = tls->mScript;
45    tls->mScript = sc;
46    return old;
47}
48
49
50bool rsdScriptInit(const Context *rsc,
51                     ScriptC *script,
52                     char const *resName,
53                     char const *cacheDir,
54                     uint8_t const *bitcode,
55                     size_t bitcodeSize,
56                     uint32_t flags) {
57    //ALOGE("rsdScriptCreate %p %p %p %p %i %i %p", rsc, resName, cacheDir, bitcode, bitcodeSize, flags, lookupFunc);
58    //ALOGE("rsdScriptInit %p %p", rsc, script);
59
60    pthread_mutex_lock(&rsdgInitMutex);
61
62    bcc::RSExecutable *exec;
63    const bcc::RSInfo *info;
64    DrvScript *drv = (DrvScript *)calloc(1, sizeof(DrvScript));
65    if (drv == NULL) {
66        goto error;
67    }
68    script->mHal.drv = drv;
69
70    drv->mCompilerContext = NULL;
71    drv->mCompilerDriver = NULL;
72    drv->mExecutable = NULL;
73
74    drv->mCompilerContext = new bcc::BCCContext();
75    if (drv->mCompilerContext == NULL) {
76        ALOGE("bcc: FAILS to create compiler context (out of memory)");
77        goto error;
78    }
79
80    drv->mCompilerDriver = new bcc::RSCompilerDriver();
81    if (drv->mCompilerDriver == NULL) {
82        ALOGE("bcc: FAILS to create compiler driver (out of memory)");
83        goto error;
84    }
85
86    script->mHal.info.isThreadable = true;
87
88    drv->mCompilerDriver->setRSRuntimeLookupFunction(rsdLookupRuntimeStub);
89    drv->mCompilerDriver->setRSRuntimeLookupContext(script);
90
91    exec = drv->mCompilerDriver->build(*drv->mCompilerContext,
92                                       cacheDir, resName,
93                                       (const char *)bitcode, bitcodeSize);
94
95    if (exec == NULL) {
96        ALOGE("bcc: FAILS to prepare executable for '%s'", resName);
97        goto error;
98    }
99
100    drv->mExecutable = exec;
101
102    exec->setThreadable(script->mHal.info.isThreadable);
103    if (!exec->syncInfo()) {
104        ALOGW("bcc: FAILS to synchronize the RS info file to the disk");
105    }
106
107    drv->mRoot = reinterpret_cast<int (*)()>(exec->getSymbolAddress("root"));
108    drv->mRootExpand =
109        reinterpret_cast<int (*)()>(exec->getSymbolAddress("root.expand"));
110    drv->mInit = reinterpret_cast<void (*)()>(exec->getSymbolAddress("init"));
111    drv->mFreeChildren =
112        reinterpret_cast<void (*)()>(exec->getSymbolAddress(".rs.dtor"));
113
114    info = &drv->mExecutable->getInfo();
115    // Copy info over to runtime
116    script->mHal.info.exportedFunctionCount = info->getExportFuncNames().size();
117    script->mHal.info.exportedVariableCount = info->getExportVarNames().size();
118    script->mHal.info.exportedPragmaCount = info->getPragmas().size();
119    script->mHal.info.exportedPragmaKeyList =
120        const_cast<const char**>(exec->getPragmaKeys().array());
121    script->mHal.info.exportedPragmaValueList =
122        const_cast<const char**>(exec->getPragmaValues().array());
123
124    if (drv->mRootExpand) {
125        script->mHal.info.root = drv->mRootExpand;
126    } else {
127        script->mHal.info.root = drv->mRoot;
128    }
129
130    if (script->mHal.info.exportedVariableCount) {
131        drv->mBoundAllocs = new Allocation *[script->mHal.info.exportedVariableCount];
132        memset(drv->mBoundAllocs, 0, sizeof(void *) * script->mHal.info.exportedVariableCount);
133    }
134
135    pthread_mutex_unlock(&rsdgInitMutex);
136    return true;
137
138error:
139
140    pthread_mutex_unlock(&rsdgInitMutex);
141    if (drv) {
142        delete drv->mCompilerContext;
143        delete drv->mCompilerDriver;
144        delete drv->mExecutable;
145        delete[] drv->mBoundAllocs;
146        free(drv);
147    }
148    script->mHal.drv = NULL;
149    return false;
150
151}
152
153bool rsdInitIntrinsic(const Context *rsc, Script *s, RsScriptIntrinsicID iid, Element *e) {
154    pthread_mutex_lock(&rsdgInitMutex);
155
156    DrvScript *drv = (DrvScript *)calloc(1, sizeof(DrvScript));
157    if (drv == NULL) {
158        goto error;
159    }
160    s->mHal.drv = drv;
161    drv->mIntrinsicID = iid;
162    drv->mIntrinsicData = rsdIntrinsic_Init(rsc, s, iid, &drv->mIntrinsicFuncs);
163
164    pthread_mutex_unlock(&rsdgInitMutex);
165    return true;
166
167error:
168    pthread_mutex_unlock(&rsdgInitMutex);
169    return false;
170}
171
172typedef void (*rs_t)(const void *, void *, const void *, uint32_t, uint32_t, uint32_t, uint32_t);
173
174static void wc_xy(void *usr, uint32_t idx) {
175    MTLaunchStruct *mtls = (MTLaunchStruct *)usr;
176    RsForEachStubParamStruct p;
177    memcpy(&p, &mtls->fep, sizeof(p));
178    RsdHal * dc = (RsdHal *)mtls->rsc->mHal.drv;
179    uint32_t sig = mtls->sig;
180
181    outer_foreach_t fn = (outer_foreach_t) mtls->kernel;
182    while (1) {
183        uint32_t slice = (uint32_t)android_atomic_inc(&mtls->mSliceNum);
184        uint32_t yStart = mtls->yStart + slice * mtls->mSliceSize;
185        uint32_t yEnd = yStart + mtls->mSliceSize;
186        yEnd = rsMin(yEnd, mtls->yEnd);
187        if (yEnd <= yStart) {
188            return;
189        }
190
191        //ALOGE("usr idx %i, x %i,%i  y %i,%i", idx, mtls->xStart, mtls->xEnd, yStart, yEnd);
192        //ALOGE("usr ptr in %p,  out %p", mtls->ptrIn, mtls->ptrOut);
193        for (p.y = yStart; p.y < yEnd; p.y++) {
194            p.out = mtls->fep.ptrOut + (mtls->fep.yStrideOut * p.y);
195            p.in = mtls->fep.ptrIn + (mtls->fep.yStrideIn * p.y);
196            fn(&p, mtls->xStart, mtls->xEnd, mtls->fep.eStrideIn, mtls->fep.eStrideOut);
197        }
198    }
199}
200
201static void wc_x(void *usr, uint32_t idx) {
202    MTLaunchStruct *mtls = (MTLaunchStruct *)usr;
203    RsForEachStubParamStruct p;
204    memcpy(&p, &mtls->fep, sizeof(p));
205    RsdHal * dc = (RsdHal *)mtls->rsc->mHal.drv;
206    uint32_t sig = mtls->sig;
207
208    outer_foreach_t fn = (outer_foreach_t) mtls->kernel;
209    while (1) {
210        uint32_t slice = (uint32_t)android_atomic_inc(&mtls->mSliceNum);
211        uint32_t xStart = mtls->xStart + slice * mtls->mSliceSize;
212        uint32_t xEnd = xStart + mtls->mSliceSize;
213        xEnd = rsMin(xEnd, mtls->xEnd);
214        if (xEnd <= xStart) {
215            return;
216        }
217
218        //ALOGE("usr slice %i idx %i, x %i,%i", slice, idx, xStart, xEnd);
219        //ALOGE("usr ptr in %p,  out %p", mtls->ptrIn, mtls->ptrOut);
220
221        p.out = mtls->fep.ptrOut + (mtls->fep.eStrideOut * xStart);
222        p.in = mtls->fep.ptrIn + (mtls->fep.eStrideIn * xStart);
223        fn(&p, xStart, xEnd, mtls->fep.eStrideIn, mtls->fep.eStrideOut);
224    }
225}
226
227void rsdScriptInvokeForEachMtlsSetup(const Context *rsc,
228                                     const Allocation * ain,
229                                     Allocation * aout,
230                                     const void * usr,
231                                     uint32_t usrLen,
232                                     const RsScriptCall *sc,
233                                     MTLaunchStruct *mtls) {
234
235    memset(mtls, 0, sizeof(MTLaunchStruct));
236
237    if (ain) {
238        mtls->fep.dimX = ain->getType()->getDimX();
239        mtls->fep.dimY = ain->getType()->getDimY();
240        mtls->fep.dimZ = ain->getType()->getDimZ();
241        //mtls->dimArray = ain->getType()->getDimArray();
242    } else if (aout) {
243        mtls->fep.dimX = aout->getType()->getDimX();
244        mtls->fep.dimY = aout->getType()->getDimY();
245        mtls->fep.dimZ = aout->getType()->getDimZ();
246        //mtls->dimArray = aout->getType()->getDimArray();
247    } else {
248        rsc->setError(RS_ERROR_BAD_SCRIPT, "rsForEach called with null allocations");
249        return;
250    }
251
252    if (!sc || (sc->xEnd == 0)) {
253        mtls->xEnd = mtls->fep.dimX;
254    } else {
255        rsAssert(sc->xStart < mtls->fep.dimX);
256        rsAssert(sc->xEnd <= mtls->fep.dimX);
257        rsAssert(sc->xStart < sc->xEnd);
258        mtls->xStart = rsMin(mtls->fep.dimX, sc->xStart);
259        mtls->xEnd = rsMin(mtls->fep.dimX, sc->xEnd);
260        if (mtls->xStart >= mtls->xEnd) return;
261    }
262
263    if (!sc || (sc->yEnd == 0)) {
264        mtls->yEnd = mtls->fep.dimY;
265    } else {
266        rsAssert(sc->yStart < mtls->fep.dimY);
267        rsAssert(sc->yEnd <= mtls->fep.dimY);
268        rsAssert(sc->yStart < sc->yEnd);
269        mtls->yStart = rsMin(mtls->fep.dimY, sc->yStart);
270        mtls->yEnd = rsMin(mtls->fep.dimY, sc->yEnd);
271        if (mtls->yStart >= mtls->yEnd) return;
272    }
273
274    mtls->xEnd = rsMax((uint32_t)1, mtls->xEnd);
275    mtls->yEnd = rsMax((uint32_t)1, mtls->yEnd);
276    mtls->zEnd = rsMax((uint32_t)1, mtls->zEnd);
277    mtls->arrayEnd = rsMax((uint32_t)1, mtls->arrayEnd);
278
279    rsAssert(!ain || (ain->getType()->getDimZ() == 0));
280
281    Context *mrsc = (Context *)rsc;
282    mtls->rsc = mrsc;
283    mtls->ain = ain;
284    mtls->aout = aout;
285    mtls->fep.usr = usr;
286    mtls->fep.usrLen = usrLen;
287    mtls->mSliceSize = 10;
288    mtls->mSliceNum = 0;
289
290    mtls->fep.ptrIn = NULL;
291    mtls->fep.eStrideIn = 0;
292    if (ain) {
293        DrvAllocation *aindrv = (DrvAllocation *)ain->mHal.drv;
294        mtls->fep.ptrIn = (const uint8_t *)aindrv->lod[0].mallocPtr;
295        mtls->fep.eStrideIn = ain->getType()->getElementSizeBytes();
296        mtls->fep.yStrideIn = aindrv->lod[0].stride;
297    }
298
299    mtls->fep.ptrOut = NULL;
300    mtls->fep.eStrideOut = 0;
301    if (aout) {
302        DrvAllocation *aoutdrv = (DrvAllocation *)aout->mHal.drv;
303        mtls->fep.ptrOut = (uint8_t *)aoutdrv->lod[0].mallocPtr;
304        mtls->fep.eStrideOut = aout->getType()->getElementSizeBytes();
305        mtls->fep.yStrideOut = aoutdrv->lod[0].stride;
306    }
307}
308
309void rsdScriptLaunchThreads(const Context *rsc,
310                            Script *s,
311                            uint32_t slot,
312                            const Allocation * ain,
313                            Allocation * aout,
314                            const void * usr,
315                            uint32_t usrLen,
316                            const RsScriptCall *sc,
317                            MTLaunchStruct *mtls) {
318
319    Script * oldTLS = setTLS(s);
320    Context *mrsc = (Context *)rsc;
321    RsdHal * dc = (RsdHal *)mtls->rsc->mHal.drv;
322
323    if ((dc->mWorkers.mCount > 1) && s->mHal.info.isThreadable && !dc->mInForEach) {
324        dc->mInForEach = true;
325        if (mtls->fep.dimY > 1) {
326            mtls->mSliceSize = mtls->fep.dimY / (dc->mWorkers.mCount * 4);
327            if(mtls->mSliceSize < 1) {
328                mtls->mSliceSize = 1;
329            }
330
331            rsdLaunchThreads(mrsc, wc_xy, mtls);
332        } else {
333            mtls->mSliceSize = mtls->fep.dimX / (dc->mWorkers.mCount * 4);
334            if(mtls->mSliceSize < 1) {
335                mtls->mSliceSize = 1;
336            }
337
338            rsdLaunchThreads(mrsc, wc_x, mtls);
339        }
340        dc->mInForEach = false;
341
342        //ALOGE("launch 1");
343    } else {
344        RsForEachStubParamStruct p;
345        memcpy(&p, &mtls->fep, sizeof(p));
346        uint32_t sig = mtls->sig;
347
348        //ALOGE("launch 3");
349        outer_foreach_t fn = (outer_foreach_t) mtls->kernel;
350        for (p.ar[0] = mtls->arrayStart; p.ar[0] < mtls->arrayEnd; p.ar[0]++) {
351            for (p.z = mtls->zStart; p.z < mtls->zEnd; p.z++) {
352                for (p.y = mtls->yStart; p.y < mtls->yEnd; p.y++) {
353                    uint32_t offset = mtls->fep.dimY * mtls->fep.dimZ * p.ar[0] +
354                                      mtls->fep.dimY * p.z + p.y;
355                    p.out = mtls->fep.ptrOut + (mtls->fep.yStrideOut * offset);
356                    p.in = mtls->fep.ptrIn + (mtls->fep.yStrideIn * offset);
357                    fn(&p, mtls->xStart, mtls->xEnd, mtls->fep.eStrideIn, mtls->fep.eStrideOut);
358                }
359            }
360        }
361    }
362
363    setTLS(oldTLS);
364}
365
366void rsdScriptInvokeForEach(const Context *rsc,
367                            Script *s,
368                            uint32_t slot,
369                            const Allocation * ain,
370                            Allocation * aout,
371                            const void * usr,
372                            uint32_t usrLen,
373                            const RsScriptCall *sc) {
374
375    RsdHal * dc = (RsdHal *)rsc->mHal.drv;
376
377    MTLaunchStruct mtls;
378    rsdScriptInvokeForEachMtlsSetup(rsc, ain, aout, usr, usrLen, sc, &mtls);
379    mtls.script = s;
380
381    DrvScript *drv = (DrvScript *)s->mHal.drv;
382    if (drv->mIntrinsicID) {
383        mtls.kernel = (void (*)())drv->mIntrinsicFuncs.root;
384        mtls.fep.usr = drv->mIntrinsicData;
385    } else {
386        rsAssert(slot < drv->mExecutable->getExportForeachFuncAddrs().size());
387        mtls.kernel = reinterpret_cast<ForEachFunc_t>(
388                          drv->mExecutable->getExportForeachFuncAddrs()[slot]);
389        rsAssert(mtls.kernel != NULL);
390        mtls.sig = drv->mExecutable->getInfo().getExportForeachFuncs()[slot].second;
391    }
392
393
394    rsdScriptLaunchThreads(rsc, s, slot, ain, aout, usr, usrLen, sc, &mtls);
395}
396
397
398int rsdScriptInvokeRoot(const Context *dc, Script *script) {
399    DrvScript *drv = (DrvScript *)script->mHal.drv;
400
401    Script * oldTLS = setTLS(script);
402    int ret = drv->mRoot();
403    setTLS(oldTLS);
404
405    return ret;
406}
407
408void rsdScriptInvokeInit(const Context *dc, Script *script) {
409    DrvScript *drv = (DrvScript *)script->mHal.drv;
410
411    if (drv->mInit) {
412        drv->mInit();
413    }
414}
415
416void rsdScriptInvokeFreeChildren(const Context *dc, Script *script) {
417    DrvScript *drv = (DrvScript *)script->mHal.drv;
418
419    if (drv->mFreeChildren) {
420        drv->mFreeChildren();
421    }
422}
423
424void rsdScriptInvokeFunction(const Context *dc, Script *script,
425                            uint32_t slot,
426                            const void *params,
427                            size_t paramLength) {
428    DrvScript *drv = (DrvScript *)script->mHal.drv;
429    //ALOGE("invoke %p %p %i %p %i", dc, script, slot, params, paramLength);
430
431    Script * oldTLS = setTLS(script);
432    reinterpret_cast<void (*)(const void *, uint32_t)>(
433        drv->mExecutable->getExportFuncAddrs()[slot])(params, paramLength);
434    setTLS(oldTLS);
435}
436
437void rsdScriptSetGlobalVar(const Context *dc, const Script *script,
438                           uint32_t slot, void *data, size_t dataLength) {
439    DrvScript *drv = (DrvScript *)script->mHal.drv;
440    //rsAssert(!script->mFieldIsObject[slot]);
441    //ALOGE("setGlobalVar %p %p %i %p %i", dc, script, slot, data, dataLength);
442
443    if (drv->mIntrinsicID) {
444        drv->mIntrinsicFuncs.setVar(dc, script, drv->mIntrinsicData, slot, data, dataLength);
445        return;
446    }
447
448    int32_t *destPtr = reinterpret_cast<int32_t *>(
449                          drv->mExecutable->getExportVarAddrs()[slot]);
450    if (!destPtr) {
451        //ALOGV("Calling setVar on slot = %i which is null", slot);
452        return;
453    }
454
455    memcpy(destPtr, data, dataLength);
456}
457
458void rsdScriptSetGlobalVarWithElemDims(
459        const android::renderscript::Context *dc,
460        const android::renderscript::Script *script,
461        uint32_t slot, void *data, size_t dataLength,
462        const android::renderscript::Element *elem,
463        const size_t *dims, size_t dimLength) {
464    DrvScript *drv = (DrvScript *)script->mHal.drv;
465
466    int32_t *destPtr = reinterpret_cast<int32_t *>(
467        drv->mExecutable->getExportVarAddrs()[slot]);
468    if (!destPtr) {
469        //ALOGV("Calling setVar on slot = %i which is null", slot);
470        return;
471    }
472
473    // We want to look at dimension in terms of integer components,
474    // but dimLength is given in terms of bytes.
475    dimLength /= sizeof(int);
476
477    // Only a single dimension is currently supported.
478    rsAssert(dimLength == 1);
479    if (dimLength == 1) {
480        // First do the increment loop.
481        size_t stride = elem->getSizeBytes();
482        char *cVal = reinterpret_cast<char *>(data);
483        for (size_t i = 0; i < dims[0]; i++) {
484            elem->incRefs(cVal);
485            cVal += stride;
486        }
487
488        // Decrement loop comes after (to prevent race conditions).
489        char *oldVal = reinterpret_cast<char *>(destPtr);
490        for (size_t i = 0; i < dims[0]; i++) {
491            elem->decRefs(oldVal);
492            oldVal += stride;
493        }
494    }
495
496    memcpy(destPtr, data, dataLength);
497}
498
499void rsdScriptSetGlobalBind(const Context *dc, const Script *script, uint32_t slot, Allocation *data) {
500    DrvScript *drv = (DrvScript *)script->mHal.drv;
501
502    //rsAssert(!script->mFieldIsObject[slot]);
503    //ALOGE("setGlobalBind %p %p %i %p", dc, script, slot, data);
504
505    if (drv->mIntrinsicID) {
506        drv->mIntrinsicFuncs.bind(dc, script, drv->mIntrinsicData, slot, data);
507        return;
508    }
509
510    int32_t *destPtr = reinterpret_cast<int32_t *>(
511                          drv->mExecutable->getExportVarAddrs()[slot]);
512    if (!destPtr) {
513        //ALOGV("Calling setVar on slot = %i which is null", slot);
514        return;
515    }
516
517    void *ptr = NULL;
518    drv->mBoundAllocs[slot] = data;
519    if(data) {
520        DrvAllocation *allocDrv = (DrvAllocation *)data->mHal.drv;
521        ptr = allocDrv->lod[0].mallocPtr;
522    }
523    memcpy(destPtr, &ptr, sizeof(void *));
524}
525
526void rsdScriptSetGlobalObj(const Context *dc, const Script *script, uint32_t slot, ObjectBase *data) {
527    DrvScript *drv = (DrvScript *)script->mHal.drv;
528    //rsAssert(script->mFieldIsObject[slot]);
529    //ALOGE("setGlobalObj %p %p %i %p", dc, script, slot, data);
530
531    int32_t *destPtr = reinterpret_cast<int32_t *>(
532                          drv->mExecutable->getExportVarAddrs()[slot]);
533    if (!destPtr) {
534        //ALOGV("Calling setVar on slot = %i which is null", slot);
535        return;
536    }
537
538    rsrSetObject(dc, script, (ObjectBase **)destPtr, data);
539}
540
541void rsdScriptDestroy(const Context *dc, Script *script) {
542    DrvScript *drv = (DrvScript *)script->mHal.drv;
543
544    if (drv == NULL) {
545        return;
546    }
547
548    if (drv->mExecutable) {
549        Vector<void *>::const_iterator var_addr_iter =
550            drv->mExecutable->getExportVarAddrs().begin();
551        Vector<void *>::const_iterator var_addr_end =
552            drv->mExecutable->getExportVarAddrs().end();
553
554        bcc::RSInfo::ObjectSlotListTy::const_iterator is_object_iter =
555            drv->mExecutable->getInfo().getObjectSlots().begin();
556        bcc::RSInfo::ObjectSlotListTy::const_iterator is_object_end =
557            drv->mExecutable->getInfo().getObjectSlots().end();
558
559        while ((var_addr_iter != var_addr_end) &&
560               (is_object_iter != is_object_end)) {
561            // The field address can be NULL if the script-side has optimized
562            // the corresponding global variable away.
563            ObjectBase **obj_addr =
564                reinterpret_cast<ObjectBase **>(*var_addr_iter);
565            if (*is_object_iter) {
566                if (*var_addr_iter != NULL) {
567                    rsrClearObject(dc, script, obj_addr);
568                }
569            }
570            var_addr_iter++;
571            is_object_iter++;
572        }
573    }
574
575    delete drv->mCompilerContext;
576    delete drv->mCompilerDriver;
577    delete drv->mExecutable;
578    delete[] drv->mBoundAllocs;
579    free(drv);
580    script->mHal.drv = NULL;
581}
582
583Allocation * rsdScriptGetAllocationForPointer(const android::renderscript::Context *dc,
584                                              const android::renderscript::Script *sc,
585                                              const void *ptr) {
586    DrvScript *drv = (DrvScript *)sc->mHal.drv;
587    if (!ptr) {
588        return NULL;
589    }
590
591    for (uint32_t ct=0; ct < sc->mHal.info.exportedVariableCount; ct++) {
592        Allocation *a = drv->mBoundAllocs[ct];
593        if (!a) continue;
594        DrvAllocation *adrv = (DrvAllocation *)a->mHal.drv;
595        if (adrv->lod[0].mallocPtr == ptr) {
596            return a;
597        }
598    }
599    ALOGE("rsGetAllocation, failed to find %p", ptr);
600    return NULL;
601}
602
603