drivers/infiniband/hw/hns/hns_roce_pd.c

   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
  38 static 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
  43 static 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
  48 int 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
  55 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
  56 {
  57         hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
  58 }
  59
  60 int 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_dev *hr_dev = to_hr_dev(ib_dev);
  64         struct device *dev = hr_dev->dev;
  65         struct hns_roce_pd *pd = to_hr_pd(ibpd);
  66         int ret;
  67
  68         ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
  69         if (ret) {
  70                 dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
  71                 return ret;
  72         }
  73
  74         if (udata) {
  75                 struct hns_roce_ib_alloc_pd_resp uresp = {.pdn = pd->pdn};
  76
  77                 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
  78                         hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
  79                         dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
  80                         return -EFAULT;
  81                 }
  82         }
  83
  84         return 0;
  85 }
  86
  87 void hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
  88 {
  89         hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
  90 }
  91
  92 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
  93 {
  94         struct resource *res;
  95         int ret;
  96
  97         /* Using bitmap to manager UAR index */
  98         ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
  99         if (ret)
 100                 return -ENOMEM;
 101
 102         if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
 103                 uar->index = (uar->logic_idx - 1) %
 104                              (hr_dev->caps.phy_num_uars - 1) + 1;
 105         else
 106                 uar->index = 0;
 107
 108         if (!dev_is_pci(hr_dev->dev)) {
 109                 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
 110                 if (!res) {
 111                         dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
 112                         return -EINVAL;
 113                 }
 114                 uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
 115         } else {
 116                 uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
 117                            >> PAGE_SHIFT);
 118         }
 119
 120         return 0;
 121 }
 122
 123 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 124 {
 125         hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
 126                              BITMAP_NO_RR);
 127 }
 128
 129 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
 130 {
 131         return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
 132                                     hr_dev->caps.num_uars,
 133                                     hr_dev->caps.num_uars - 1,
 134                                     hr_dev->caps.reserved_uars, 0);
 135 }
 136
 137 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
 138 {
 139         hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
 140 }