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/pci.h>
  34 #include "hns_roce_device.h"
  35
  36 void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
  37 {
  38         struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
  39
  40         ida_init(&pd_ida->ida);
  41         pd_ida->max = hr_dev->caps.num_pds - 1;
  42         pd_ida->min = hr_dev->caps.reserved_pds;
  43 }
  44
  45 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
  46 {
  47         struct ib_device *ib_dev = ibpd->device;
  48         struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
  49         struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
  50         struct hns_roce_pd *pd = to_hr_pd(ibpd);
  51         int ret = 0;
  52         int id;
  53
  54         id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
  55                              GFP_KERNEL);
  56         if (id < 0) {
  57                 ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
  58                 return -ENOMEM;
  59         }
  60         pd->pdn = (unsigned long)id;
  61
  62         if (udata) {
  63                 struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
  64
  65                 ret = ib_copy_to_udata(udata, &resp,
  66                                        min(udata->outlen, sizeof(resp)));
  67                 if (ret) {
  68                         ida_free(&pd_ida->ida, id);
  69                         ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
  70                 }
  71         }
  72
  73         return ret;
  74 }
  75
  76 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
  77 {
  78         struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
  79
  80         ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
  81
  82         return 0;
  83 }
  84
  85 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
  86 {
  87         struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
  88         int id;
  89
  90         /* Using bitmap to manager UAR index */
  91         id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max,
  92                              GFP_KERNEL);
  93         if (id < 0) {
  94                 ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id);
  95                 return -ENOMEM;
  96         }
  97         uar->logic_idx = (unsigned long)id;
  98
  99         if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
 100                 uar->index = (uar->logic_idx - 1) %
 101                              (hr_dev->caps.phy_num_uars - 1) + 1;
 102         else
 103                 uar->index = 0;
 104
 105         uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) >> PAGE_SHIFT);
 106         if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_DIRECT_WQE)
 107                 hr_dev->dwqe_page = pci_resource_start(hr_dev->pci_dev, 4);
 108
 109         return 0;
 110 }
 111
 112 void hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
 113 {
 114         struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
 115
 116         ida_init(&uar_ida->ida);
 117         uar_ida->max = hr_dev->caps.num_uars - 1;
 118         uar_ida->min = hr_dev->caps.reserved_uars;
 119 }
 120
 121 static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
 122 {
 123         struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
 124         int id;
 125
 126         id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
 127                              GFP_KERNEL);
 128         if (id < 0) {
 129                 ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
 130                 return -ENOMEM;
 131         }
 132         *xrcdn = (u32)id;
 133
 134         return 0;
 135 }
 136
 137 void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
 138 {
 139         struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
 140
 141         ida_init(&xrcd_ida->ida);
 142         xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
 143         xrcd_ida->min = hr_dev->caps.reserved_xrcds;
 144 }
 145
 146 int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
 147 {
 148         struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
 149         struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
 150         int ret;
 151
 152         if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)) {
 153                 ret = -EOPNOTSUPP;
 154                 goto err_out;
 155         }
 156
 157         ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
 158
 159 err_out:
 160         if (ret)
 161                 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_XRCD_ALLOC_ERR_CNT]);
 162
 163         return ret;
 164 }
 165
 166 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
 167 {
 168         struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
 169         u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
 170
 171         ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
 172
 173         return 0;
 174 }