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 return -EINVAL; 154 155 ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn); 156 if (ret) 157 return ret; 158 159 return 0; 160 } 161 162 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata) 163 { 164 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device); 165 u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn; 166 167 ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn); 168 169 return 0; 170 } 171