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 "hns_roce_device.h"
  35
  36 static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
  37 {
  38         struct device *dev = &hr_dev->pdev->dev;
  39         unsigned long pd_number;
  40         int ret = 0;
  41
  42         ret = hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, &pd_number);
  43         if (ret == -1) {
  44                 dev_err(dev, "alloc pdn from pdbitmap failed\n");
  45                 return -ENOMEM;
  46         }
  47
  48         *pdn = pd_number;
  49
  50         return 0;
  51 }
  52
  53 static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
  54 {
  55         hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn);
  56 }
  57
  58 int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
  59 {
  60         return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
  61                                     hr_dev->caps.num_pds - 1,
  62                                     hr_dev->caps.reserved_pds, 0);
  63 }
  64
  65 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
  66 {
  67         hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
  68 }
  69
  70 struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev,
  71                                 struct ib_ucontext *context,
  72                                 struct ib_udata *udata)
  73 {
  74         struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
  75         struct device *dev = &hr_dev->pdev->dev;
  76         struct hns_roce_pd *pd;
  77         int ret;
  78
  79         pd = kmalloc(sizeof(*pd), GFP_KERNEL);
  80         if (!pd)
  81                 return ERR_PTR(-ENOMEM);
  82
  83         ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
  84         if (ret) {
  85                 kfree(pd);
  86                 dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
  87                 return ERR_PTR(ret);
  88         }
  89
  90         if (context) {
  91                 if (ib_copy_to_udata(udata, &pd->pdn, sizeof(u64))) {
  92                         hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
  93                         dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
  94                         kfree(pd);
  95                         return ERR_PTR(-EFAULT);
  96                 }
  97         }
  98
  99         return &pd->ibpd;
 100 }
 101
 102 int hns_roce_dealloc_pd(struct ib_pd *pd)
 103 {
 104         hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
 105         kfree(to_hr_pd(pd));
 106
 107         return 0;
 108 }
 109
 110 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 111 {
 112         struct resource *res;
 113         int ret = 0;
 114
 115         /* Using bitmap to manager UAR index */
 116         ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->index);
 117         if (ret == -1)
 118                 return -ENOMEM;
 119
 120         uar->index = (uar->index - 1) % hr_dev->caps.phy_num_uars + 1;
 121
 122         res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
 123         uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
 124
 125         return 0;
 126 }
 127
 128 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 129 {
 130         hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->index);
 131 }
 132
 133 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
 134 {
 135         return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
 136                                     hr_dev->caps.num_uars,
 137                                     hr_dev->caps.num_uars - 1,
 138                                     hr_dev->caps.reserved_uars, 0);
 139 }
 140
 141 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
 142 {
 143         hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
 144 }