netmap_mem2.c (685dc743dc3b5645e34836464128e1c0558b404b) netmap_mem2.c (d1bdc2821fcd416ab9b238580386eb605a6128d0)
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (C) 2012-2014 Matteo Landi
5 * Copyright (C) 2012-2016 Luigi Rizzo
6 * Copyright (C) 2012-2016 Giuseppe Lettieri
7 * All rights reserved.
8 *

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1279
1280 /*
1281 * Free each cluster allocated in
1282 * netmap_finalize_obj_allocator(). The cluster start
1283 * addresses are stored at multiples of p->_clusterentries
1284 * in the lut.
1285 */
1286 for (i = 0; i < p->objtotal; i += p->_clustentries) {
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (C) 2012-2014 Matteo Landi
5 * Copyright (C) 2012-2016 Luigi Rizzo
6 * Copyright (C) 2012-2016 Giuseppe Lettieri
7 * All rights reserved.
8 *

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1279
1280 /*
1281 * Free each cluster allocated in
1282 * netmap_finalize_obj_allocator(). The cluster start
1283 * addresses are stored at multiples of p->_clusterentries
1284 * in the lut.
1285 */
1286 for (i = 0; i < p->objtotal; i += p->_clustentries) {
1287 contigfree(p->lut[i].vaddr, p->_clustsize, M_NETMAP);
1287 free(p->lut[i].vaddr, M_NETMAP);
1288 }
1289 nm_free_lut(p->lut, p->objtotal);
1290 }
1291 p->lut = NULL;
1292 p->objtotal = 0;
1293 p->memtotal = 0;
1294 p->numclusters = 0;
1295 p->objfree = 0;

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1397 return 0;
1398}
1399
1400/* call with NMA_LOCK held */
1401static int
1402netmap_finalize_obj_allocator(struct netmap_obj_pool *p)
1403{
1404 int i; /* must be signed */
1288 }
1289 nm_free_lut(p->lut, p->objtotal);
1290 }
1291 p->lut = NULL;
1292 p->objtotal = 0;
1293 p->memtotal = 0;
1294 p->numclusters = 0;
1295 p->objfree = 0;

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1397 return 0;
1398}
1399
1400/* call with NMA_LOCK held */
1401static int
1402netmap_finalize_obj_allocator(struct netmap_obj_pool *p)
1403{
1404 int i; /* must be signed */
1405 size_t n;
1406
1407 if (p->lut) {
1408 /* if the lut is already there we assume that also all the
1409 * clusters have already been allocated, possibly by somebody
1410 * else (e.g., extmem). In the latter case, the alloc_done flag
1411 * will remain at zero, so that we will not attempt to
1412 * deallocate the clusters by ourselves in
1413 * netmap_reset_obj_allocator.

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1425 nm_prerr("Unable to create lookup table for '%s'", p->name);
1426 goto clean;
1427 }
1428
1429 /*
1430 * Allocate clusters, init pointers
1431 */
1432
1405
1406 if (p->lut) {
1407 /* if the lut is already there we assume that also all the
1408 * clusters have already been allocated, possibly by somebody
1409 * else (e.g., extmem). In the latter case, the alloc_done flag
1410 * will remain at zero, so that we will not attempt to
1411 * deallocate the clusters by ourselves in
1412 * netmap_reset_obj_allocator.

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1424 nm_prerr("Unable to create lookup table for '%s'", p->name);
1425 goto clean;
1426 }
1427
1428 /*
1429 * Allocate clusters, init pointers
1430 */
1431
1433 n = p->_clustsize;
1434 for (i = 0; i < (int)p->objtotal;) {
1435 int lim = i + p->_clustentries;
1436 char *clust;
1437
1438 /*
1439 * XXX Note, we only need contigmalloc() for buffers attached
1440 * to native interfaces. In all other cases (nifp, netmap rings
1441 * and even buffers for VALE ports or emulated interfaces) we
1442 * can live with standard malloc, because the hardware will not
1443 * access the pages directly.
1444 */
1432 for (i = 0; i < (int)p->objtotal;) {
1433 int lim = i + p->_clustentries;
1434 char *clust;
1435
1436 /*
1437 * XXX Note, we only need contigmalloc() for buffers attached
1438 * to native interfaces. In all other cases (nifp, netmap rings
1439 * and even buffers for VALE ports or emulated interfaces) we
1440 * can live with standard malloc, because the hardware will not
1441 * access the pages directly.
1442 */
1445 clust = contigmalloc(n, M_NETMAP, M_NOWAIT | M_ZERO,
1443 clust = contigmalloc(p->_clustsize, M_NETMAP, M_NOWAIT | M_ZERO,
1446 (size_t)0, -1UL, PAGE_SIZE, 0);
1447 if (clust == NULL) {
1448 /*
1449 * If we get here, there is a severe memory shortage,
1450 * so halve the allocated memory to reclaim some.
1451 */
1452 nm_prerr("Unable to create cluster at %d for '%s' allocator",
1453 i, p->name);
1454 if (i < 2) /* nothing to halve */
1455 goto out;
1456 lim = i / 2;
1457 for (i--; i >= lim; i--) {
1458 if (i % p->_clustentries == 0 && p->lut[i].vaddr)
1444 (size_t)0, -1UL, PAGE_SIZE, 0);
1445 if (clust == NULL) {
1446 /*
1447 * If we get here, there is a severe memory shortage,
1448 * so halve the allocated memory to reclaim some.
1449 */
1450 nm_prerr("Unable to create cluster at %d for '%s' allocator",
1451 i, p->name);
1452 if (i < 2) /* nothing to halve */
1453 goto out;
1454 lim = i / 2;
1455 for (i--; i >= lim; i--) {
1456 if (i % p->_clustentries == 0 && p->lut[i].vaddr)
1459 contigfree(p->lut[i].vaddr,
1460 n, M_NETMAP);
1457 free(p->lut[i].vaddr, M_NETMAP);
1461 p->lut[i].vaddr = NULL;
1462 }
1463 out:
1464 p->objtotal = i;
1465 /* we may have stopped in the middle of a cluster */
1466 p->numclusters = (i + p->_clustentries - 1) / p->_clustentries;
1467 break;
1468 }

--- 1501 unchanged lines hidden --- 		1458 p->lut[i].vaddr = NULL;
1459 }
1460 out:
1461 p->objtotal = i;
1462 /* we may have stopped in the middle of a cluster */
1463 p->numclusters = (i + p->_clustentries - 1) / p->_clustentries;
1464 break;
1465 }

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