drivers/hwtracing/coresight/coresight-catu.c

285

static void catu_free_etr_buf(struct etr_buf *etr_buf)

drivers/hwtracing/coresight/coresight-catu.c

289

if (!etr_buf || etr_buf->mode != ETR_MODE_CATU || !etr_buf->private)

drivers/hwtracing/coresight/coresight-catu.c

292

catu_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-catu.c

297

static ssize_t catu_get_data_etr_buf(struct etr_buf *etr_buf, u64 offset,

drivers/hwtracing/coresight/coresight-catu.c

300

struct catu_etr_buf *catu_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-catu.c

305

static void catu_sync_etr_buf(struct etr_buf *etr_buf, u64 rrp, u64 rwp)

drivers/hwtracing/coresight/coresight-catu.c

307

struct catu_etr_buf *catu_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-catu.c

315

r_offset = rrp - etr_buf->hwaddr;

drivers/hwtracing/coresight/coresight-catu.c

316

w_offset = rwp - etr_buf->hwaddr;

drivers/hwtracing/coresight/coresight-catu.c

318

if (!etr_buf->full) {

drivers/hwtracing/coresight/coresight-catu.c

319

etr_buf->len = w_offset - r_offset;

drivers/hwtracing/coresight/coresight-catu.c

321

etr_buf->len += etr_buf->size;

drivers/hwtracing/coresight/coresight-catu.c

323

etr_buf->len = etr_buf->size;

drivers/hwtracing/coresight/coresight-catu.c

326

etr_buf->offset = r_offset;

drivers/hwtracing/coresight/coresight-catu.c

327

tmc_sg_table_sync_data_range(catu_table, r_offset, etr_buf->len);

drivers/hwtracing/coresight/coresight-catu.c

331

struct etr_buf *etr_buf, int node, void **pages)

drivers/hwtracing/coresight/coresight-catu.c

345

etr_buf->size, pages);

drivers/hwtracing/coresight/coresight-catu.c

351

etr_buf->mode = ETR_MODE_CATU;

drivers/hwtracing/coresight/coresight-catu.c

352

etr_buf->private = catu_buf;

drivers/hwtracing/coresight/coresight-catu.c

353

etr_buf->hwaddr = CATU_DEFAULT_INADDR;

drivers/hwtracing/coresight/coresight-catu.c

404

struct etr_buf *etr_buf = NULL;

drivers/hwtracing/coresight/coresight-catu.c

428

etr_buf = tmc_etr_get_buffer(etrdev, cs_mode, path);

drivers/hwtracing/coresight/coresight-catu.c

429

if (IS_ERR(etr_buf))

drivers/hwtracing/coresight/coresight-catu.c

430

return PTR_ERR(etr_buf);

drivers/hwtracing/coresight/coresight-catu.c

434

if (etr_buf && etr_buf->mode == ETR_MODE_CATU) {

drivers/hwtracing/coresight/coresight-catu.c

435

struct catu_etr_buf *catu_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1003

len = (len < (etr_buf->size - offset)) ? len : etr_buf->size - offset;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1005

return etr_buf->ops->get_data(etr_buf, (u64)offset, len, bufpp);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1009

tmc_etr_buf_insert_barrier_packet(struct etr_buf *etr_buf, u64 offset)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1014

len = tmc_etr_buf_get_data(etr_buf, offset,

drivers/hwtracing/coresight/coresight-tmc-etr.c

1030

struct etr_buf *etr_buf = drvdata->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1045

etr_buf->len = 0;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1046

etr_buf->full = false;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1050

etr_buf->full = !!(status & TMC_STS_FULL);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1052

WARN_ON(!etr_buf->ops || !etr_buf->ops->sync);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1054

etr_buf->ops->sync(etr_buf, rrp, rwp);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1060

struct etr_buf *etr_buf = drvdata->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1074

writel_relaxed(etr_buf->size / 4, drvdata->base + TMC_RSZ);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1088

if (etr_buf->mode == ETR_MODE_ETR_SG)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1092

tmc_write_dba(drvdata, etr_buf->hwaddr);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1099

tmc_write_rrp(drvdata, etr_buf->hwaddr);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1100

tmc_write_rwp(drvdata, etr_buf->hwaddr);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1119

struct etr_buf *etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1124

if (WARN_ON(!etr_buf))

drivers/hwtracing/coresight/coresight-tmc-etr.c

1127

if ((etr_buf->mode == ETR_MODE_ETR_SG) &&

drivers/hwtracing/coresight/coresight-tmc-etr.c

1131

if (WARN_ON(drvdata->etr_buf))

drivers/hwtracing/coresight/coresight-tmc-etr.c

1136

drvdata->etr_buf = etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1139

drvdata->etr_buf = NULL;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1162

struct etr_buf *etr_buf = drvdata->sysfs_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1164

if (pos + actual > etr_buf->len)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1165

actual = etr_buf->len - pos;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1170

offset = etr_buf->offset + pos;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1171

if (offset >= etr_buf->size)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1172

offset -= etr_buf->size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1173

return tmc_etr_buf_get_data(etr_buf, offset, actual, bufpp);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1176

static struct etr_buf *

drivers/hwtracing/coresight/coresight-tmc-etr.c

1184

tmc_etr_free_sysfs_buf(struct etr_buf *buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1192

struct etr_buf *etr_buf = drvdata->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1194

if (WARN_ON(drvdata->sysfs_buf != etr_buf)) {

drivers/hwtracing/coresight/coresight-tmc-etr.c

1203

if (etr_buf->full)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1204

tmc_etr_buf_insert_barrier_packet(etr_buf,

drivers/hwtracing/coresight/coresight-tmc-etr.c

1205

etr_buf->offset);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1232

drvdata->etr_buf = NULL;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1235

static struct etr_buf *tmc_etr_get_sysfs_buffer(struct coresight_device *csdev)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1240

struct etr_buf *sysfs_buf = NULL, *new_buf = NULL, *free_buf = NULL;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1300

struct etr_buf *sysfs_buf = tmc_etr_get_sysfs_buffer(csdev);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1345

struct etr_buf *tmc_etr_get_buffer(struct coresight_device *csdev,

drivers/hwtracing/coresight/coresight-tmc-etr.c

1357

if (WARN_ON(!etr_perf || !etr_perf->etr_buf))

drivers/hwtracing/coresight/coresight-tmc-etr.c

1359

return etr_perf->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1371

static struct etr_buf *

drivers/hwtracing/coresight/coresight-tmc-etr.c

1376

struct etr_buf *etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1390

etr_buf = tmc_alloc_etr_buf(drvdata, size, 0, node, NULL);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1391

if (!IS_ERR(etr_buf))

drivers/hwtracing/coresight/coresight-tmc-etr.c

1392

return etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1399

static struct etr_buf *

drivers/hwtracing/coresight/coresight-tmc-etr.c

1406

struct etr_buf *etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1428

etr_buf = idr_find(&drvdata->idr, pid);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1429

if (etr_buf) {

drivers/hwtracing/coresight/coresight-tmc-etr.c

1430

refcount_inc(&etr_buf->refcount);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1432

return etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1438

etr_buf = alloc_etr_buf(drvdata, event, nr_pages, pages, snapshot);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1439

if (IS_ERR(etr_buf))

drivers/hwtracing/coresight/coresight-tmc-etr.c

1440

return etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1444

ret = idr_alloc(&drvdata->idr, etr_buf, pid, pid + 1, GFP_KERNEL);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1449

tmc_free_etr_buf(etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1455

tmc_free_etr_buf(etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1460

return etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1463

static struct etr_buf *

drivers/hwtracing/coresight/coresight-tmc-etr.c

1475

static struct etr_buf *

drivers/hwtracing/coresight/coresight-tmc-etr.c

1492

struct etr_buf *etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1501

etr_buf = get_perf_etr_buf(drvdata, event, nr_pages, pages, snapshot);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1502

if (!IS_ERR(etr_buf))

drivers/hwtracing/coresight/coresight-tmc-etr.c

1514

etr_perf->etr_buf = etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1546

struct etr_buf *buf, *etr_buf = etr_perf->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1548

if (!etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1553

if (!refcount_dec_and_test(&etr_buf->refcount)) {

drivers/hwtracing/coresight/coresight-tmc-etr.c

1566

if (buf && WARN_ON(buf != etr_buf))

drivers/hwtracing/coresight/coresight-tmc-etr.c

1569

tmc_free_etr_buf(etr_perf->etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1587

struct etr_buf *etr_buf = etr_perf->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1603

if (src_offset >= etr_buf->size)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1604

src_offset -= etr_buf->size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1605

bytes = tmc_etr_buf_get_data(etr_buf, src_offset, to_copy,

drivers/hwtracing/coresight/coresight-tmc-etr.c

1643

struct etr_buf *etr_buf = etr_perf->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1654

if (WARN_ON(drvdata->perf_buf != etr_buf)) {

drivers/hwtracing/coresight/coresight-tmc-etr.c

1668

lost = etr_buf->full;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1669

offset = etr_buf->offset;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1670

size = etr_buf->len;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1687

offset = etr_buf->offset + etr_buf->len - size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1689

if (offset >= etr_buf->size)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1690

offset -= etr_buf->size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1696

tmc_etr_buf_insert_barrier_packet(etr_buf, offset);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1752

if (WARN_ON(!etr_perf || !etr_perf->etr_buf)) {

drivers/hwtracing/coresight/coresight-tmc-etr.c

1775

rc = tmc_etr_enable_hw(drvdata, etr_perf->etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

1780

drvdata->perf_buf = etr_perf->etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

1844

if (!drvdata->etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1848

if (drvdata->etr_buf->mode != ETR_MODE_RESRV)

drivers/hwtracing/coresight/coresight-tmc-etr.c

1960

struct etr_buf *sysfs_buf = NULL;

drivers/hwtracing/coresight/coresight-tmc-etr.c

48

struct etr_buf *etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

603

struct etr_buf *etr_buf, int node,

drivers/hwtracing/coresight/coresight-tmc-etr.c

617

flat_buf->vaddr = dma_alloc_noncoherent(real_dev, etr_buf->size,

drivers/hwtracing/coresight/coresight-tmc-etr.c

626

flat_buf->size = etr_buf->size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

628

etr_buf->hwaddr = flat_buf->daddr;

drivers/hwtracing/coresight/coresight-tmc-etr.c

629

etr_buf->mode = ETR_MODE_FLAT;

drivers/hwtracing/coresight/coresight-tmc-etr.c

630

etr_buf->private = flat_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

634

static void tmc_etr_free_flat_buf(struct etr_buf *etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

636

struct etr_flat_buf *flat_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

641

dma_free_noncoherent(real_dev, etr_buf->size,

drivers/hwtracing/coresight/coresight-tmc-etr.c

648

static void tmc_etr_sync_flat_buf(struct etr_buf *etr_buf, u64 rrp, u64 rwp)

drivers/hwtracing/coresight/coresight-tmc-etr.c

650

struct etr_flat_buf *flat_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

657

etr_buf->offset = rrp - etr_buf->hwaddr;

drivers/hwtracing/coresight/coresight-tmc-etr.c

658

if (etr_buf->full)

drivers/hwtracing/coresight/coresight-tmc-etr.c

659

etr_buf->len = etr_buf->size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

661

etr_buf->len = rwp - rrp;

drivers/hwtracing/coresight/coresight-tmc-etr.c

668

if (etr_buf->offset + etr_buf->len > etr_buf->size)

drivers/hwtracing/coresight/coresight-tmc-etr.c

670

etr_buf->size, DMA_FROM_DEVICE);

drivers/hwtracing/coresight/coresight-tmc-etr.c

673

flat_buf->daddr + etr_buf->offset,

drivers/hwtracing/coresight/coresight-tmc-etr.c

674

etr_buf->len, DMA_FROM_DEVICE);

drivers/hwtracing/coresight/coresight-tmc-etr.c

677

static ssize_t tmc_etr_get_data_flat_buf(struct etr_buf *etr_buf,

drivers/hwtracing/coresight/coresight-tmc-etr.c

680

struct etr_flat_buf *flat_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

701

struct etr_buf *etr_buf, int node,

drivers/hwtracing/coresight/coresight-tmc-etr.c

725

resrv_buf->size = etr_buf->size = drvdata->resrv_buf.size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

727

etr_buf->hwaddr = resrv_buf->daddr;

drivers/hwtracing/coresight/coresight-tmc-etr.c

728

etr_buf->mode = ETR_MODE_RESRV;

drivers/hwtracing/coresight/coresight-tmc-etr.c

729

etr_buf->private = resrv_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

733

static void tmc_etr_free_resrv_buf(struct etr_buf *etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

735

struct etr_flat_buf *resrv_buf = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

746

static void tmc_etr_sync_resrv_buf(struct etr_buf *etr_buf, u64 rrp, u64 rwp)

drivers/hwtracing/coresight/coresight-tmc-etr.c

752

etr_buf->offset = rrp - etr_buf->hwaddr;

drivers/hwtracing/coresight/coresight-tmc-etr.c

753

if (etr_buf->full)

drivers/hwtracing/coresight/coresight-tmc-etr.c

754

etr_buf->len = etr_buf->size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

756

etr_buf->len = rwp - rrp;

drivers/hwtracing/coresight/coresight-tmc-etr.c

771

struct etr_buf *etr_buf, int node,

drivers/hwtracing/coresight/coresight-tmc-etr.c

778

etr_buf->size, pages);

drivers/hwtracing/coresight/coresight-tmc-etr.c

781

etr_buf->hwaddr = etr_table->hwaddr;

drivers/hwtracing/coresight/coresight-tmc-etr.c

782

etr_buf->mode = ETR_MODE_ETR_SG;

drivers/hwtracing/coresight/coresight-tmc-etr.c

783

etr_buf->private = etr_table;

drivers/hwtracing/coresight/coresight-tmc-etr.c

787

static void tmc_etr_free_sg_buf(struct etr_buf *etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

789

struct etr_sg_table *etr_table = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

797

static ssize_t tmc_etr_get_data_sg_buf(struct etr_buf *etr_buf, u64 offset,

drivers/hwtracing/coresight/coresight-tmc-etr.c

800

struct etr_sg_table *etr_table = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

805

static void tmc_etr_sync_sg_buf(struct etr_buf *etr_buf, u64 rrp, u64 rwp)

drivers/hwtracing/coresight/coresight-tmc-etr.c

808

struct etr_sg_table *etr_table = etr_buf->private;

drivers/hwtracing/coresight/coresight-tmc-etr.c

816

etr_buf->len = 0;

drivers/hwtracing/coresight/coresight-tmc-etr.c

824

etr_buf->len = 0;

drivers/hwtracing/coresight/coresight-tmc-etr.c

828

etr_buf->offset = r_offset;

drivers/hwtracing/coresight/coresight-tmc-etr.c

829

if (etr_buf->full)

drivers/hwtracing/coresight/coresight-tmc-etr.c

830

etr_buf->len = etr_buf->size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

832

etr_buf->len = ((w_offset < r_offset) ? etr_buf->size : 0) +

drivers/hwtracing/coresight/coresight-tmc-etr.c

834

tmc_sg_table_sync_data_range(table, r_offset, etr_buf->len);

drivers/hwtracing/coresight/coresight-tmc-etr.c

887

static int tmc_etr_mode_alloc_buf(int mode, struct tmc_drvdata *drvdata, struct etr_buf *etr_buf,

drivers/hwtracing/coresight/coresight-tmc-etr.c

898

rc = etr_buf_ops[mode]->alloc(drvdata, etr_buf,

drivers/hwtracing/coresight/coresight-tmc-etr.c

901

etr_buf->ops = etr_buf_ops[mode];

drivers/hwtracing/coresight/coresight-tmc-etr.c

933

static struct etr_buf *tmc_alloc_etr_buf(struct tmc_drvdata *drvdata,

drivers/hwtracing/coresight/coresight-tmc-etr.c

938

struct etr_buf *etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

943

etr_buf = kzalloc_obj(*etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

944

if (!etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

947

etr_buf->size = size;

drivers/hwtracing/coresight/coresight-tmc-etr.c

952

etr_buf, node, pages);

drivers/hwtracing/coresight/coresight-tmc-etr.c

968

etr_buf, node, pages);

drivers/hwtracing/coresight/coresight-tmc-etr.c

971

etr_buf, node, pages);

drivers/hwtracing/coresight/coresight-tmc-etr.c

974

etr_buf, node, pages);

drivers/hwtracing/coresight/coresight-tmc-etr.c

976

kfree(etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

980

refcount_set(&etr_buf->refcount, 1);

drivers/hwtracing/coresight/coresight-tmc-etr.c

982

(unsigned long)size >> 10, etr_buf->mode);

drivers/hwtracing/coresight/coresight-tmc-etr.c

983

return etr_buf;

drivers/hwtracing/coresight/coresight-tmc-etr.c

986

static void tmc_free_etr_buf(struct etr_buf *etr_buf)

drivers/hwtracing/coresight/coresight-tmc-etr.c

988

WARN_ON(!etr_buf->ops || !etr_buf->ops->free);

drivers/hwtracing/coresight/coresight-tmc-etr.c

989

etr_buf->ops->free(etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

990

kfree(etr_buf);

drivers/hwtracing/coresight/coresight-tmc-etr.c

999

static ssize_t tmc_etr_buf_get_data(struct etr_buf *etr_buf,

drivers/hwtracing/coresight/coresight-tmc.h

262

struct etr_buf *etr_buf; /* TMC ETR */

drivers/hwtracing/coresight/coresight-tmc.h

274

struct etr_buf *sysfs_buf;

drivers/hwtracing/coresight/coresight-tmc.h

275

struct etr_buf *perf_buf;

drivers/hwtracing/coresight/coresight-tmc.h

281

int (*alloc)(struct tmc_drvdata *drvdata, struct etr_buf *etr_buf,

drivers/hwtracing/coresight/coresight-tmc.h

283

void (*sync)(struct etr_buf *etr_buf, u64 rrp, u64 rwp);

drivers/hwtracing/coresight/coresight-tmc.h

284

ssize_t (*get_data)(struct etr_buf *etr_buf, u64 offset, size_t len,

drivers/hwtracing/coresight/coresight-tmc.h

286

void (*free)(struct etr_buf *etr_buf);

drivers/hwtracing/coresight/coresight-tmc.h

446

struct etr_buf *tmc_etr_get_buffer(struct coresight_device *csdev,