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1/*2 * Copyright (c) 2016 Hisilicon Limited.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#include <linux/pci.h>34#include "hns_roce_device.h"35 36void 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 45int 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 76int 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 85int 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 else103 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 112void 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 121static 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 137void 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 146int 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 159err_out:160 if (ret)161 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_XRCD_ALLOC_ERR_CNT]);162 163 return ret;164}165 166int 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}175