cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mthca_uar.c (2424B)

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