cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

mthca_pd.c (2597B)

      1/*
      2 * Copyright (c) 2004 Topspin Communications.  All rights reserved.
      3 * Copyright (c) 2005 Cisco Systems.  All rights reserved.
      4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
      5 *
      6 * This software is available to you under a choice of one of two
      7 * licenses.  You may choose to be licensed under the terms of the GNU
      8 * General Public License (GPL) Version 2, available from the file
      9 * COPYING in the main directory of this source tree, or the
     10 * OpenIB.org BSD license below:
     11 *
     12 *     Redistribution and use in source and binary forms, with or
     13 *     without modification, are permitted provided that the following
     14 *     conditions are met:
     15 *
     16 *      - Redistributions of source code must retain the above
     17 *        copyright notice, this list of conditions and the following
     18 *        disclaimer.
     19 *
     20 *      - Redistributions in binary form must reproduce the above
     21 *        copyright notice, this list of conditions and the following
     22 *        disclaimer in the documentation and/or other materials
     23 *        provided with the distribution.
     24 *
     25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     32 * SOFTWARE.
     33 */
     34
     35#include <linux/errno.h>
     36
     37#include "mthca_dev.h"
     38
     39int mthca_pd_alloc(struct mthca_dev *dev, int privileged, struct mthca_pd *pd)
     40{
     41	int err = 0;
     42
     43	pd->privileged = privileged;
     44
     45	atomic_set(&pd->sqp_count, 0);
     46	pd->pd_num = mthca_alloc(&dev->pd_table.alloc);
     47	if (pd->pd_num == -1)
     48		return -ENOMEM;
     49
     50	if (privileged) {
     51		err = mthca_mr_alloc_notrans(dev, pd->pd_num,
     52					     MTHCA_MPT_FLAG_LOCAL_READ |
     53					     MTHCA_MPT_FLAG_LOCAL_WRITE,
     54					     &pd->ntmr);
     55		if (err)
     56			mthca_free(&dev->pd_table.alloc, pd->pd_num);
     57	}
     58
     59	return err;
     60}
     61
     62void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd)
     63{
     64	if (pd->privileged)
     65		mthca_free_mr(dev, &pd->ntmr);
     66	mthca_free(&dev->pd_table.alloc, pd->pd_num);
     67}
     68
     69int mthca_init_pd_table(struct mthca_dev *dev)
     70{
     71	return mthca_alloc_init(&dev->pd_table.alloc,
     72				dev->limits.num_pds,
     73				(1 << 24) - 1,
     74				dev->limits.reserved_pds);
     75}
     76
     77void mthca_cleanup_pd_table(struct mthca_dev *dev)
     78{
     79	/* XXX check if any PDs are still allocated? */
     80	mthca_alloc_cleanup(&dev->pd_table.alloc);
     81}