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 "hns_roce_device.h" 36 37 static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn) 38 { 39 return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0; 40 } 41 42 static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn) 43 { 44 hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR); 45 } 46 47 int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev) 48 { 49 return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds, 50 hr_dev->caps.num_pds - 1, 51 hr_dev->caps.reserved_pds, 0); 52 } 53 54 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev) 55 { 56 hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap); 57 } 58 59 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 60 { 61 struct ib_device *ib_dev = ibpd->device; 62 struct hns_roce_pd *pd = to_hr_pd(ibpd); 63 int ret; 64 65 ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn); 66 if (ret) { 67 ibdev_err(ib_dev, "failed to alloc pd, ret = %d.\n", ret); 68 return ret; 69 } 70 71 if (udata) { 72 struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn}; 73 74 ret = ib_copy_to_udata(udata, &resp, 75 min(udata->outlen, sizeof(resp))); 76 if (ret) { 77 hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn); 78 ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret); 79 } 80 } 81 82 return ret; 83 } 84 85 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) 86 { 87 hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn); 88 return 0; 89 } 90 91 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 92 { 93 struct resource *res; 94 int ret; 95 96 /* Using bitmap to manager UAR index */ 97 ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx); 98 if (ret) 99 return -ENOMEM; 100 101 if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1) 102 uar->index = (uar->logic_idx - 1) % 103 (hr_dev->caps.phy_num_uars - 1) + 1; 104 else 105 uar->index = 0; 106 107 if (!dev_is_pci(hr_dev->dev)) { 108 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0); 109 if (!res) { 110 dev_err(&hr_dev->pdev->dev, "memory resource not found!\n"); 111 return -EINVAL; 112 } 113 uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index; 114 } else { 115 uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) 116 >> PAGE_SHIFT); 117 } 118 119 return 0; 120 } 121 122 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 123 { 124 hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx, 125 BITMAP_NO_RR); 126 } 127 128 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev) 129 { 130 return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap, 131 hr_dev->caps.num_uars, 132 hr_dev->caps.num_uars - 1, 133 hr_dev->caps.reserved_uars, 0); 134 } 135 136 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev) 137 { 138 hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap); 139 } 140