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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* * Copyright(c) 2016 - 2019 Intel Corporation. */ #include <linux/slab.h> #include "ah.h" #include "vt.h" /* for prints */ /** * rvt_check_ah - validate the attributes of AH * @ibdev: the ib device * @ah_attr: the attributes of the AH * * If driver supports a more detailed check_ah function call back to it * otherwise just check the basics. * * Return: 0 on success */ int rvt_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr) { int err; int port_num = rdma_ah_get_port_num(ah_attr); struct ib_port_attr port_attr; struct rvt_dev_info *rdi = ib_to_rvt(ibdev); u8 ah_flags = rdma_ah_get_ah_flags(ah_attr); u8 static_rate = rdma_ah_get_static_rate(ah_attr); err = ib_query_port(ibdev, port_num, &port_attr); if (err) return -EINVAL; if (port_num < 1 || port_num > ibdev->phys_port_cnt) return -EINVAL; if (static_rate != IB_RATE_PORT_CURRENT && ib_rate_to_mbps(static_rate) < 0) return -EINVAL; if ((ah_flags & IB_AH_GRH) && rdma_ah_read_grh(ah_attr)->sgid_index >= port_attr.gid_tbl_len) return -EINVAL; if (rdi->driver_f.check_ah) return rdi->driver_f.check_ah(ibdev, ah_attr); return 0; } EXPORT_SYMBOL(rvt_check_ah); /** * rvt_create_ah - create an address handle * @ibah: the IB address handle * @init_attr: the attributes of the AH * @udata: pointer to user's input output buffer information. * * This may be called from interrupt context. * * Return: 0 on success */ int rvt_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, struct ib_udata *udata) { struct rvt_ah *ah = ibah_to_rvtah(ibah); struct rvt_dev_info *dev = ib_to_rvt(ibah->device); unsigned long flags; if (rvt_check_ah(ibah->device, init_attr->ah_attr)) return -EINVAL; spin_lock_irqsave(&dev->n_ahs_lock, flags); if (dev->n_ahs_allocated == dev->dparms.props.max_ah) { spin_unlock_irqrestore(&dev->n_ahs_lock, flags); return -ENOMEM; } dev->n_ahs_allocated++; spin_unlock_irqrestore(&dev->n_ahs_lock, flags); rdma_copy_ah_attr(&ah->attr, init_attr->ah_attr); if (dev->driver_f.notify_new_ah) dev->driver_f.notify_new_ah(ibah->device, init_attr->ah_attr, ah); return 0; } /** * rvt_destroy_ah - Destroy an address handle * @ibah: address handle * @destroy_flags: destroy address handle flags (see enum rdma_destroy_ah_flags) * Return: 0 on success */ int rvt_destroy_ah(struct ib_ah *ibah, u32 destroy_flags) { struct rvt_dev_info *dev = ib_to_rvt(ibah->device); struct rvt_ah *ah = ibah_to_rvtah(ibah); unsigned long flags; spin_lock_irqsave(&dev->n_ahs_lock, flags); dev->n_ahs_allocated--; spin_unlock_irqrestore(&dev->n_ahs_lock, flags); rdma_destroy_ah_attr(&ah->attr); return 0; } /** * rvt_modify_ah - modify an ah with given attrs * @ibah: address handle to modify * @ah_attr: attrs to apply * * Return: 0 on success */ int rvt_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) { struct rvt_ah *ah = ibah_to_rvtah(ibah); if (rvt_check_ah(ibah->device, ah_attr)) return -EINVAL; ah->attr = *ah_attr; return 0; } /** * rvt_query_ah - return attrs for ah * @ibah: address handle to query * @ah_attr: return info in this * * Return: always 0 */ int rvt_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) { struct rvt_ah *ah = ibah_to_rvtah(ibah); *ah_attr = ah->attr; return 0; } |