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 "hns_roce_device.h" 35 36 static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn) 37 { 38 return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn); 39 } 40 41 static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn) 42 { 43 hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn); 44 } 45 46 int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev) 47 { 48 return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds, 49 hr_dev->caps.num_pds - 1, 50 hr_dev->caps.reserved_pds, 0); 51 } 52 53 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev) 54 { 55 hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap); 56 } 57 58 struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev, 59 struct ib_ucontext *context, 60 struct ib_udata *udata) 61 { 62 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev); 63 struct device *dev = &hr_dev->pdev->dev; 64 struct hns_roce_pd *pd; 65 int ret; 66 67 pd = kmalloc(sizeof(*pd), GFP_KERNEL); 68 if (!pd) 69 return ERR_PTR(-ENOMEM); 70 71 ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn); 72 if (ret) { 73 kfree(pd); 74 dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n"); 75 return ERR_PTR(ret); 76 } 77 78 if (context) { 79 if (ib_copy_to_udata(udata, &pd->pdn, sizeof(u64))) { 80 hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn); 81 dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n"); 82 kfree(pd); 83 return ERR_PTR(-EFAULT); 84 } 85 } 86 87 return &pd->ibpd; 88 } 89 90 int hns_roce_dealloc_pd(struct ib_pd *pd) 91 { 92 hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn); 93 kfree(to_hr_pd(pd)); 94 95 return 0; 96 } 97 98 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 99 { 100 struct resource *res; 101 int ret = 0; 102 103 /* Using bitmap to manager UAR index */ 104 ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->index); 105 if (ret == -1) 106 return -ENOMEM; 107 108 if (uar->index > 0) 109 uar->index = (uar->index - 1) % 110 (hr_dev->caps.phy_num_uars - 1) + 1; 111 112 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0); 113 if (!res) { 114 dev_err(&hr_dev->pdev->dev, "memory resource not found!\n"); 115 return -EINVAL; 116 } 117 uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index; 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->index); 125 } 126 127 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev) 128 { 129 return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap, 130 hr_dev->caps.num_uars, 131 hr_dev->caps.num_uars - 1, 132 hr_dev->caps.reserved_uars, 0); 133 } 134 135 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev) 136 { 137 hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap); 138 } 139