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 struct device *dev = &hr_dev->pdev->dev; 39 unsigned long pd_number; 40 int ret = 0; 41 42 ret = hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, &pd_number); 43 if (ret == -1) { 44 dev_err(dev, "alloc pdn from pdbitmap failed\n"); 45 return -ENOMEM; 46 } 47 48 *pdn = pd_number; 49 50 return 0; 51 } 52 53 static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn) 54 { 55 hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn); 56 } 57 58 int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev) 59 { 60 return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds, 61 hr_dev->caps.num_pds - 1, 62 hr_dev->caps.reserved_pds, 0); 63 } 64 65 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev) 66 { 67 hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap); 68 } 69 70 struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev, 71 struct ib_ucontext *context, 72 struct ib_udata *udata) 73 { 74 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev); 75 struct device *dev = &hr_dev->pdev->dev; 76 struct hns_roce_pd *pd; 77 int ret; 78 79 pd = kmalloc(sizeof(*pd), GFP_KERNEL); 80 if (!pd) 81 return ERR_PTR(-ENOMEM); 82 83 ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn); 84 if (ret) { 85 kfree(pd); 86 dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n"); 87 return ERR_PTR(ret); 88 } 89 90 if (context) { 91 if (ib_copy_to_udata(udata, &pd->pdn, sizeof(u64))) { 92 hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn); 93 dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n"); 94 kfree(pd); 95 return ERR_PTR(-EFAULT); 96 } 97 } 98 99 return &pd->ibpd; 100 } 101 102 int hns_roce_dealloc_pd(struct ib_pd *pd) 103 { 104 hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn); 105 kfree(to_hr_pd(pd)); 106 107 return 0; 108 } 109 110 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 111 { 112 struct resource *res; 113 int ret = 0; 114 115 /* Using bitmap to manager UAR index */ 116 ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->index); 117 if (ret == -1) 118 return -ENOMEM; 119 120 uar->index = (uar->index - 1) % hr_dev->caps.phy_num_uars + 1; 121 122 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0); 123 uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index; 124 125 return 0; 126 } 127 128 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) 129 { 130 hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->index); 131 } 132 133 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev) 134 { 135 return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap, 136 hr_dev->caps.num_uars, 137 hr_dev->caps.num_uars - 1, 138 hr_dev->caps.reserved_uars, 0); 139 } 140 141 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev) 142 { 143 hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap); 144 } 145