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 <rdma/uverbs_ioctl.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_respond_udata(udata, resp); 66 if (ret) 67 ida_free(&pd_ida->ida, id); 68 } 69 70 return ret; 71 } 72 73 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) 74 { 75 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); 76 77 ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn); 78 79 return 0; 80 } 81 82 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 83 { 84 struct hns_roce_ida *uar_ida = &hr_dev->uar_ida; 85 int id; 86 87 /* Using bitmap to manager UAR index */ 88 id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max, 89 GFP_KERNEL); 90 if (id < 0) { 91 ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id); 92 return -ENOMEM; 93 } 94 uar->logic_idx = (unsigned long)id; 95 96 if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1) 97 uar->index = (uar->logic_idx - 1) % 98 (hr_dev->caps.phy_num_uars - 1) + 1; 99 else 100 uar->index = 0; 101 102 uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) >> PAGE_SHIFT); 103 if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_DIRECT_WQE) 104 hr_dev->dwqe_page = pci_resource_start(hr_dev->pci_dev, 4); 105 106 return 0; 107 } 108 109 void hns_roce_init_uar_table(struct hns_roce_dev *hr_dev) 110 { 111 struct hns_roce_ida *uar_ida = &hr_dev->uar_ida; 112 113 ida_init(&uar_ida->ida); 114 uar_ida->max = hr_dev->caps.num_uars - 1; 115 uar_ida->min = hr_dev->caps.reserved_uars; 116 } 117 118 static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn) 119 { 120 struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida; 121 int id; 122 123 id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max, 124 GFP_KERNEL); 125 if (id < 0) { 126 ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id); 127 return -ENOMEM; 128 } 129 *xrcdn = (u32)id; 130 131 return 0; 132 } 133 134 void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev) 135 { 136 struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida; 137 138 ida_init(&xrcd_ida->ida); 139 xrcd_ida->max = hr_dev->caps.num_xrcds - 1; 140 xrcd_ida->min = hr_dev->caps.reserved_xrcds; 141 } 142 143 int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata) 144 { 145 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device); 146 struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd); 147 int ret; 148 149 if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)) { 150 ret = -EOPNOTSUPP; 151 goto err_out; 152 } 153 154 ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn); 155 156 err_out: 157 if (ret) 158 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_XRCD_ALLOC_ERR_CNT]); 159 160 return ret; 161 } 162 163 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata) 164 { 165 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device); 166 u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn; 167 168 ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn); 169 170 return 0; 171 } 172