1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2022, Microsoft Corporation. All rights reserved. 4 */ 5 6 #include "mana_ib.h" 7 #include <net/mana/mana_auxiliary.h> 8 #include <net/addrconf.h> 9 10 MODULE_DESCRIPTION("Microsoft Azure Network Adapter IB driver"); 11 MODULE_LICENSE("GPL"); 12 MODULE_IMPORT_NS("NET_MANA"); 13 14 static const struct ib_device_ops mana_ib_dev_ops = { 15 .owner = THIS_MODULE, 16 .driver_id = RDMA_DRIVER_MANA, 17 .uverbs_abi_ver = MANA_IB_UVERBS_ABI_VERSION, 18 19 .add_gid = mana_ib_gd_add_gid, 20 .alloc_pd = mana_ib_alloc_pd, 21 .alloc_ucontext = mana_ib_alloc_ucontext, 22 .create_ah = mana_ib_create_ah, 23 .create_cq = mana_ib_create_cq, 24 .create_qp = mana_ib_create_qp, 25 .create_rwq_ind_table = mana_ib_create_rwq_ind_table, 26 .create_wq = mana_ib_create_wq, 27 .dealloc_pd = mana_ib_dealloc_pd, 28 .dealloc_ucontext = mana_ib_dealloc_ucontext, 29 .del_gid = mana_ib_gd_del_gid, 30 .dereg_mr = mana_ib_dereg_mr, 31 .destroy_ah = mana_ib_destroy_ah, 32 .destroy_cq = mana_ib_destroy_cq, 33 .destroy_qp = mana_ib_destroy_qp, 34 .destroy_rwq_ind_table = mana_ib_destroy_rwq_ind_table, 35 .destroy_wq = mana_ib_destroy_wq, 36 .disassociate_ucontext = mana_ib_disassociate_ucontext, 37 .get_dma_mr = mana_ib_get_dma_mr, 38 .get_link_layer = mana_ib_get_link_layer, 39 .get_port_immutable = mana_ib_get_port_immutable, 40 .mmap = mana_ib_mmap, 41 .modify_qp = mana_ib_modify_qp, 42 .modify_wq = mana_ib_modify_wq, 43 .poll_cq = mana_ib_poll_cq, 44 .post_recv = mana_ib_post_recv, 45 .post_send = mana_ib_post_send, 46 .query_device = mana_ib_query_device, 47 .query_gid = mana_ib_query_gid, 48 .query_pkey = mana_ib_query_pkey, 49 .query_port = mana_ib_query_port, 50 .reg_user_mr = mana_ib_reg_user_mr, 51 .reg_user_mr_dmabuf = mana_ib_reg_user_mr_dmabuf, 52 .req_notify_cq = mana_ib_arm_cq, 53 54 INIT_RDMA_OBJ_SIZE(ib_ah, mana_ib_ah, ibah), 55 INIT_RDMA_OBJ_SIZE(ib_cq, mana_ib_cq, ibcq), 56 INIT_RDMA_OBJ_SIZE(ib_pd, mana_ib_pd, ibpd), 57 INIT_RDMA_OBJ_SIZE(ib_qp, mana_ib_qp, ibqp), 58 INIT_RDMA_OBJ_SIZE(ib_ucontext, mana_ib_ucontext, ibucontext), 59 INIT_RDMA_OBJ_SIZE(ib_rwq_ind_table, mana_ib_rwq_ind_table, 60 ib_ind_table), 61 }; 62 63 static const struct ib_device_ops mana_ib_stats_ops = { 64 .alloc_hw_port_stats = mana_ib_alloc_hw_port_stats, 65 .get_hw_stats = mana_ib_get_hw_stats, 66 }; 67 68 static const struct ib_device_ops mana_ib_device_stats_ops = { 69 .alloc_hw_device_stats = mana_ib_alloc_hw_device_stats, 70 }; 71 72 const struct ib_device_ops mana_ib_dev_dm_ops = { 73 .alloc_dm = mana_ib_alloc_dm, 74 .dealloc_dm = mana_ib_dealloc_dm, 75 .reg_dm_mr = mana_ib_reg_dm_mr, 76 }; 77 78 static int mana_ib_netdev_event(struct notifier_block *this, 79 unsigned long event, void *ptr) 80 { 81 struct mana_ib_dev *dev = container_of(this, struct mana_ib_dev, nb); 82 struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); 83 struct gdma_context *gc = dev->gdma_dev->gdma_context; 84 struct mana_context *mc = gc->mana.driver_data; 85 struct net_device *ndev; 86 int i; 87 88 /* Only process events from our parent device */ 89 for (i = 0; i < dev->ib_dev.phys_port_cnt; i++) 90 if (event_dev == mc->ports[i]) { 91 switch (event) { 92 case NETDEV_CHANGEUPPER: 93 ndev = mana_get_primary_netdev(mc, i, &dev->dev_tracker); 94 /* 95 * RDMA core will setup GID based on updated netdev. 96 * It's not possible to race with the core as rtnl lock is being 97 * held. 98 */ 99 ib_device_set_netdev(&dev->ib_dev, ndev, i + 1); 100 101 /* mana_get_primary_netdev() returns ndev with refcount held */ 102 if (ndev) 103 netdev_put(ndev, &dev->dev_tracker); 104 105 return NOTIFY_OK; 106 default: 107 return NOTIFY_DONE; 108 } 109 } 110 return NOTIFY_DONE; 111 } 112 113 static int mana_ib_probe(struct auxiliary_device *adev, 114 const struct auxiliary_device_id *id) 115 { 116 struct mana_adev *madev = container_of(adev, struct mana_adev, adev); 117 struct gdma_context *gc = madev->mdev->gdma_context; 118 struct mana_context *mc = gc->mana.driver_data; 119 struct gdma_dev *mdev = madev->mdev; 120 struct net_device *ndev; 121 struct mana_ib_dev *dev; 122 u8 mac_addr[ETH_ALEN]; 123 int ret, i; 124 125 dev = ib_alloc_device(mana_ib_dev, ib_dev); 126 if (!dev) 127 return -ENOMEM; 128 129 ib_set_device_ops(&dev->ib_dev, &mana_ib_dev_ops); 130 dev->ib_dev.node_type = RDMA_NODE_IB_CA; 131 dev->ib_dev.num_comp_vectors = gc->max_num_queues; 132 dev->ib_dev.dev.parent = gc->dev; 133 dev->gdma_dev = mdev; 134 xa_init_flags(&dev->qp_table_wq, XA_FLAGS_LOCK_IRQ); 135 136 if (mana_ib_is_rnic(dev)) { 137 dev->ib_dev.phys_port_cnt = 1; 138 addrconf_addr_eui48((u8 *)&dev->ib_dev.node_guid, mc->ports[0]->dev_addr); 139 ret = mana_ib_gd_query_adapter_caps(dev); 140 if (ret) { 141 ibdev_err(&dev->ib_dev, "Failed to query device caps, ret %d", ret); 142 goto free_ib_device; 143 } 144 145 ib_set_device_ops(&dev->ib_dev, &mana_ib_stats_ops); 146 if (dev->adapter_caps.feature_flags & MANA_IB_FEATURE_DEV_COUNTERS_SUPPORT) 147 ib_set_device_ops(&dev->ib_dev, &mana_ib_device_stats_ops); 148 ib_set_device_ops(&dev->ib_dev, &mana_ib_dev_dm_ops); 149 150 ret = mana_ib_create_eqs(dev); 151 if (ret) { 152 ibdev_err(&dev->ib_dev, "Failed to create EQs, ret %d", ret); 153 goto free_ib_device; 154 } 155 156 ret = mana_ib_gd_create_rnic_adapter(dev); 157 if (ret) 158 goto destroy_eqs; 159 160 if (dev->adapter_caps.feature_flags & MANA_IB_FEATURE_MULTI_PORTS_SUPPORT) 161 dev->ib_dev.phys_port_cnt = mc->num_ports; 162 163 for (i = 0; i < dev->ib_dev.phys_port_cnt; i++) { 164 ndev = mana_get_primary_netdev(mc, i, &dev->dev_tracker); 165 if (!ndev) { 166 ret = -ENODEV; 167 ibdev_err(&dev->ib_dev, 168 "Failed to get netdev for IB port %d", i + 1); 169 goto destroy_rnic; 170 } 171 ether_addr_copy(mac_addr, ndev->dev_addr); 172 ret = ib_device_set_netdev(&dev->ib_dev, ndev, i + 1); 173 /* mana_get_primary_netdev() returns ndev with refcount held */ 174 netdev_put(ndev, &dev->dev_tracker); 175 if (ret) { 176 ibdev_err(&dev->ib_dev, "Failed to set ib netdev, ret %d", ret); 177 goto destroy_rnic; 178 } 179 ret = mana_ib_gd_config_mac(dev, ADDR_OP_ADD, mac_addr); 180 if (ret) { 181 ibdev_err(&dev->ib_dev, "Failed to add Mac address, ret %d", ret); 182 goto destroy_rnic; 183 } 184 } 185 dev->nb.notifier_call = mana_ib_netdev_event; 186 ret = register_netdevice_notifier(&dev->nb); 187 if (ret) { 188 ibdev_err(&dev->ib_dev, "Failed to register net notifier, %d", ret); 189 goto destroy_rnic; 190 } 191 } else { 192 dev->ib_dev.phys_port_cnt = mc->num_ports; 193 ret = mana_eth_query_adapter_caps(dev); 194 if (ret) { 195 ibdev_err(&dev->ib_dev, "Failed to query ETH device caps, ret %d", ret); 196 goto free_ib_device; 197 } 198 } 199 200 dev->av_pool = dma_pool_create("mana_ib_av", gc->dev, MANA_AV_BUFFER_SIZE, 201 MANA_AV_BUFFER_SIZE, 0); 202 if (!dev->av_pool) { 203 ret = -ENOMEM; 204 goto deregister_net_notifier; 205 } 206 207 ibdev_dbg(&dev->ib_dev, "mdev=%p id=%d num_ports=%d\n", mdev, 208 mdev->dev_id.as_uint32, dev->ib_dev.phys_port_cnt); 209 210 ret = ib_register_device(&dev->ib_dev, mana_ib_is_rnic(dev) ? "mana_%d" : "manae_%d", 211 gc->dev); 212 if (ret) 213 goto deallocate_pool; 214 215 dev_set_drvdata(&adev->dev, dev); 216 217 return 0; 218 219 deallocate_pool: 220 dma_pool_destroy(dev->av_pool); 221 deregister_net_notifier: 222 if (mana_ib_is_rnic(dev)) 223 unregister_netdevice_notifier(&dev->nb); 224 destroy_rnic: 225 if (mana_ib_is_rnic(dev)) 226 mana_ib_gd_destroy_rnic_adapter(dev); 227 destroy_eqs: 228 if (mana_ib_is_rnic(dev)) 229 mana_ib_destroy_eqs(dev); 230 free_ib_device: 231 xa_destroy(&dev->qp_table_wq); 232 ib_dealloc_device(&dev->ib_dev); 233 return ret; 234 } 235 236 static void mana_ib_remove(struct auxiliary_device *adev) 237 { 238 struct mana_ib_dev *dev = dev_get_drvdata(&adev->dev); 239 240 if (mana_ib_is_rnic(dev)) 241 mana_drain_gsi_sqs(dev); 242 243 ib_unregister_device(&dev->ib_dev); 244 dma_pool_destroy(dev->av_pool); 245 if (mana_ib_is_rnic(dev)) { 246 unregister_netdevice_notifier(&dev->nb); 247 mana_ib_gd_destroy_rnic_adapter(dev); 248 mana_ib_destroy_eqs(dev); 249 } 250 xa_destroy(&dev->qp_table_wq); 251 ib_dealloc_device(&dev->ib_dev); 252 } 253 254 static const struct auxiliary_device_id mana_id_table[] = { 255 { .name = "mana.rdma", }, 256 { .name = "mana.eth", }, 257 {}, 258 }; 259 260 MODULE_DEVICE_TABLE(auxiliary, mana_id_table); 261 262 static struct auxiliary_driver mana_driver = { 263 .probe = mana_ib_probe, 264 .remove = mana_ib_remove, 265 .id_table = mana_id_table, 266 }; 267 268 module_auxiliary_driver(mana_driver); 269