LXR linux/drivers/infiniband/hw/hns/hns_roce

   1/*
   2 * Copyright (c) 2016 Hisilicon Limited.
   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 <linux/platform_device.h>
  34#include <linux/pci.h>
  35#include <uapi/rdma/hns-abi.h>
  36#include "hns_roce_device.h"
  37
  38static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
  39{
  40        return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0;
  41}
  42
  43static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
  44{
  45        hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR);
  46}
  47
  48int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
  49{
  50        return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
  51                                    hr_dev->caps.num_pds - 1,
  52                                    hr_dev->caps.reserved_pds, 0);
  53}
  54
  55void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
  56{
  57        hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
  58}
  59
  60int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
  61{
  62        struct ib_device *ib_dev = ibpd->device;
  63        struct hns_roce_pd *pd = to_hr_pd(ibpd);
  64        int ret;
  65
  66        ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
  67        if (ret) {
  68                ibdev_err(ib_dev, "failed to alloc pd, ret = %d\n", ret);
  69                return ret;
  70        }
  71
  72        if (udata) {
  73                struct hns_roce_ib_alloc_pd_resp uresp = {.pdn = pd->pdn};
  74
  75                if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
  76                        hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
  77                        ibdev_err(ib_dev, "failed to copy to udata\n");
  78                        return -EFAULT;
  79                }
  80        }
  81
  82        return 0;
  83}
  84
  85int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
  86{
  87        hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
  88        return 0;
  89}
  90
  91int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
  92{
  93        struct resource *res;
  94        int ret;
  95
  96        /* Using bitmap to manager UAR index */
  97        ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
  98        if (ret)
  99                return -ENOMEM;
 100
 101        if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
 102                uar->index = (uar->logic_idx - 1) %
 103                             (hr_dev->caps.phy_num_uars - 1) + 1;
 104        else
 105                uar->index = 0;
 106
 107        if (!dev_is_pci(hr_dev->dev)) {
 108                res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
 109                if (!res) {
 110                        dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
 111                        return -EINVAL;
 112                }
 113                uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
 114        } else {
 115                uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
 116                           >> PAGE_SHIFT);
 117        }
 118
 119        return 0;
 120}
 121
 122void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 123{
 124        hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
 125                             BITMAP_NO_RR);
 126}
 127
 128int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
 129{
 130        return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
 131                                    hr_dev->caps.num_uars,
 132                                    hr_dev->caps.num_uars - 1,
 133                                    hr_dev->caps.reserved_uars, 0);
 134}
 135
 136void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
 137{
 138        hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
 139}
 140