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 38 static 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) ? -ENOMEM : 0; 41 } 42 43 static 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 48 int 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 55 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev) 56 { 57 hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap); 58 } 59 60 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 61 { 62 struct ib_device *ib_dev = ibpd->device; 63 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev); 64 struct device *dev = hr_dev->dev; 65 struct hns_roce_pd *pd = to_hr_pd(ibpd); 66 int ret; 67 68 ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn); 69 if (ret) { 70 dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n"); 71 return ret; 72 } 73 74 if (udata) { 75 struct hns_roce_ib_alloc_pd_resp uresp = {.pdn = pd->pdn}; 76 77 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) { 78 hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn); 79 dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n"); 80 return -EFAULT; 81 } 82 } 83 84 return 0; 85 } 86 87 void hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) 88 { 89 hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn); 90 } 91 92 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 93 { 94 struct resource *res; 95 int ret; 96 97 /* Using bitmap to manager UAR index */ 98 ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx); 99 if (ret == -1) 100 return -ENOMEM; 101 102 if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1) 103 uar->index = (uar->logic_idx - 1) % 104 (hr_dev->caps.phy_num_uars - 1) + 1; 105 else 106 uar->index = 0; 107 108 if (!dev_is_pci(hr_dev->dev)) { 109 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0); 110 if (!res) { 111 dev_err(&hr_dev->pdev->dev, "memory resource not found!\n"); 112 return -EINVAL; 113 } 114 uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index; 115 } else { 116 uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) 117 >> PAGE_SHIFT); 118 } 119 120 return 0; 121 } 122 123 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 124 { 125 hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx, 126 BITMAP_NO_RR); 127 } 128 129 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev) 130 { 131 return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap, 132 hr_dev->caps.num_uars, 133 hr_dev->caps.num_uars - 1, 134 hr_dev->caps.reserved_uars, 0); 135 } 136 137 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev) 138 { 139 hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap); 140 } 141