LXR linux/drivers/infiniband/hw/cxgb3/iwch

   1/*
   2 * Copyright (c) 2006 Chelsio, Inc. 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#include <linux/slab.h>
  33#include <asm/byteorder.h>
  34
  35#include <rdma/iw_cm.h>
  36#include <rdma/ib_verbs.h>
  37
  38#include "cxio_hal.h"
  39#include "cxio_resource.h"
  40#include "iwch.h"
  41#include "iwch_provider.h"
  42
  43static int iwch_finish_mem_reg(struct iwch_mr *mhp, u32 stag)
  44{
  45        u32 mmid;
  46
  47        mhp->attr.state = 1;
  48        mhp->attr.stag = stag;
  49        mmid = stag >> 8;
  50        mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
  51        pr_debug("%s mmid 0x%x mhp %p\n", __func__, mmid, mhp);
  52        return insert_handle(mhp->rhp, &mhp->rhp->mmidr, mhp, mmid);
  53}
  54
  55int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
  56                      struct iwch_mr *mhp, int shift)
  57{
  58        u32 stag;
  59        int ret;
  60
  61        if (cxio_register_phys_mem(&rhp->rdev,
  62                                   &stag, mhp->attr.pdid,
  63                                   mhp->attr.perms,
  64                                   mhp->attr.zbva,
  65                                   mhp->attr.va_fbo,
  66                                   mhp->attr.len,
  67                                   shift - 12,
  68                                   mhp->attr.pbl_size, mhp->attr.pbl_addr))
  69                return -ENOMEM;
  70
  71        ret = iwch_finish_mem_reg(mhp, stag);
  72        if (ret)
  73                cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
  74                       mhp->attr.pbl_addr);
  75        return ret;
  76}
  77
  78int iwch_alloc_pbl(struct iwch_mr *mhp, int npages)
  79{
  80        mhp->attr.pbl_addr = cxio_hal_pblpool_alloc(&mhp->rhp->rdev,
  81                                                    npages << 3);
  82
  83        if (!mhp->attr.pbl_addr)
  84                return -ENOMEM;
  85
  86        mhp->attr.pbl_size = npages;
  87
  88        return 0;
  89}
  90
  91void iwch_free_pbl(struct iwch_mr *mhp)
  92{
  93        cxio_hal_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
  94                              mhp->attr.pbl_size << 3);
  95}
  96
  97int iwch_write_pbl(struct iwch_mr *mhp, __be64 *pages, int npages, int offset)
  98{
  99        return cxio_write_pbl(&mhp->rhp->rdev, pages,
 100                              mhp->attr.pbl_addr + (offset << 3), npages);
 101}
 102