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);
  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
  60struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev,
  61                                struct ib_ucontext *context,
  62                                struct ib_udata *udata)
  63{
  64        struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
  65        struct device *dev = hr_dev->dev;
  66        struct hns_roce_pd *pd;
  67        int ret;
  68
  69        pd = kmalloc(sizeof(*pd), GFP_KERNEL);
  70        if (!pd)
  71                return ERR_PTR(-ENOMEM);
  72
  73        ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
  74        if (ret) {
  75                kfree(pd);
  76                dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
  77                return ERR_PTR(ret);
  78        }
  79
  80        if (context) {
  81                struct hns_roce_ib_alloc_pd_resp uresp = {.pdn = pd->pdn};
  82
  83                if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
  84                        hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
  85                        dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
  86                        kfree(pd);
  87                        return ERR_PTR(-EFAULT);
  88                }
  89        }
  90
  91        return &pd->ibpd;
  92}
  93EXPORT_SYMBOL_GPL(hns_roce_alloc_pd);
  94
  95int hns_roce_dealloc_pd(struct ib_pd *pd)
  96{
  97        hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
  98        kfree(to_hr_pd(pd));
  99
 100        return 0;
 101}
 102EXPORT_SYMBOL_GPL(hns_roce_dealloc_pd);
 103
 104int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 105{
 106        struct resource *res;
 107        int ret = 0;
 108
 109        /* Using bitmap to manager UAR index */
 110        ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->index);
 111        if (ret == -1)
 112                return -ENOMEM;
 113
 114        if (uar->index > 0)
 115                uar->index = (uar->index - 1) %
 116                             (hr_dev->caps.phy_num_uars - 1) + 1;
 117
 118        if (!dev_is_pci(hr_dev->dev)) {
 119                res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
 120                if (!res) {
 121                        dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
 122                        return -EINVAL;
 123                }
 124                uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
 125        } else {
 126                uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
 127                           >> PAGE_SHIFT);
 128        }
 129
 130        return 0;
 131}
 132
 133void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 134{
 135        hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->index,
 136                             BITMAP_NO_RR);
 137}
 138
 139int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
 140{
 141        return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
 142                                    hr_dev->caps.num_uars,
 143                                    hr_dev->caps.num_uars - 1,
 144                                    hr_dev->caps.reserved_uars, 0);
 145}
 146
 147void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
 148{
 149        hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
 150}
 151