1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */ 3 4 #include <linux/module.h> 5 #include <linux/printk.h> 6 #include <linux/pci.h> 7 #include <linux/irq.h> 8 #include <net/addrconf.h> 9 #include <rdma/ib_addr.h> 10 #include <rdma/ib_mad.h> 11 12 #include "ionic_ibdev.h" 13 14 #define DRIVER_DESCRIPTION "AMD Pensando RoCE HCA driver" 15 #define DEVICE_DESCRIPTION "AMD Pensando RoCE HCA" 16 17 MODULE_AUTHOR("Allen Hubbe <allen.hubbe@amd.com>"); 18 MODULE_DESCRIPTION(DRIVER_DESCRIPTION); 19 MODULE_LICENSE("GPL"); 20 MODULE_IMPORT_NS("NET_IONIC"); 21 22 static int ionic_query_device(struct ib_device *ibdev, 23 struct ib_device_attr *attr, 24 struct ib_udata *udata) 25 { 26 struct ionic_ibdev *dev = to_ionic_ibdev(ibdev); 27 struct net_device *ndev; 28 int err; 29 30 err = ib_no_udata_io(udata); 31 if (err) 32 return err; 33 34 ndev = ib_device_get_netdev(ibdev, 1); 35 addrconf_ifid_eui48((u8 *)&attr->sys_image_guid, ndev); 36 dev_put(ndev); 37 attr->max_mr_size = dev->lif_cfg.npts_per_lif * PAGE_SIZE / 2; 38 attr->page_size_cap = dev->lif_cfg.page_size_supported; 39 40 attr->vendor_id = to_pci_dev(dev->lif_cfg.hwdev)->vendor; 41 attr->vendor_part_id = to_pci_dev(dev->lif_cfg.hwdev)->device; 42 43 attr->hw_ver = ionic_lif_asic_rev(dev->lif_cfg.lif); 44 attr->fw_ver = 0; 45 attr->max_qp = dev->lif_cfg.qp_count; 46 attr->max_qp_wr = IONIC_MAX_DEPTH; 47 attr->device_cap_flags = 48 IB_DEVICE_MEM_WINDOW | 49 IB_DEVICE_MEM_MGT_EXTENSIONS | 50 IB_DEVICE_MEM_WINDOW_TYPE_2B | 51 0; 52 attr->max_send_sge = 53 min(ionic_v1_send_wqe_max_sge(dev->lif_cfg.max_stride, 0, false), 54 IONIC_SPEC_HIGH); 55 attr->max_recv_sge = 56 min(ionic_v1_recv_wqe_max_sge(dev->lif_cfg.max_stride, 0, false), 57 IONIC_SPEC_HIGH); 58 attr->max_sge_rd = attr->max_send_sge; 59 attr->max_cq = dev->lif_cfg.cq_count / dev->lif_cfg.udma_count; 60 attr->max_cqe = IONIC_MAX_CQ_DEPTH - IONIC_CQ_GRACE; 61 attr->max_mr = dev->lif_cfg.nmrs_per_lif; 62 attr->max_pd = IONIC_MAX_PD; 63 attr->max_qp_rd_atom = IONIC_MAX_RD_ATOM; 64 attr->max_ee_rd_atom = 0; 65 attr->max_res_rd_atom = IONIC_MAX_RD_ATOM; 66 attr->max_qp_init_rd_atom = IONIC_MAX_RD_ATOM; 67 attr->max_ee_init_rd_atom = 0; 68 attr->atomic_cap = IB_ATOMIC_GLOB; 69 attr->masked_atomic_cap = IB_ATOMIC_GLOB; 70 attr->max_mw = dev->lif_cfg.nmrs_per_lif; 71 attr->max_mcast_grp = 0; 72 attr->max_mcast_qp_attach = 0; 73 attr->max_ah = dev->lif_cfg.nahs_per_lif; 74 attr->max_fast_reg_page_list_len = dev->lif_cfg.npts_per_lif / 2; 75 attr->max_pkeys = IONIC_PKEY_TBL_LEN; 76 77 return 0; 78 } 79 80 static int ionic_query_port(struct ib_device *ibdev, u32 port, 81 struct ib_port_attr *attr) 82 { 83 struct net_device *ndev; 84 85 if (port != 1) 86 return -EINVAL; 87 88 ndev = ib_device_get_netdev(ibdev, port); 89 if (!ndev) 90 return -ENODEV; 91 92 if (netif_running(ndev) && netif_carrier_ok(ndev)) { 93 attr->state = IB_PORT_ACTIVE; 94 attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP; 95 } else if (netif_running(ndev)) { 96 attr->state = IB_PORT_DOWN; 97 attr->phys_state = IB_PORT_PHYS_STATE_POLLING; 98 } else { 99 attr->state = IB_PORT_DOWN; 100 attr->phys_state = IB_PORT_PHYS_STATE_DISABLED; 101 } 102 103 attr->max_mtu = iboe_get_mtu(ndev->max_mtu); 104 attr->active_mtu = min(attr->max_mtu, iboe_get_mtu(ndev->mtu)); 105 attr->gid_tbl_len = IONIC_GID_TBL_LEN; 106 attr->ip_gids = true; 107 attr->port_cap_flags = 0; 108 attr->max_msg_sz = 0x80000000; 109 attr->pkey_tbl_len = IONIC_PKEY_TBL_LEN; 110 attr->max_vl_num = 1; 111 attr->subnet_prefix = 0xfe80000000000000ull; 112 113 dev_put(ndev); 114 115 return ib_get_eth_speed(ibdev, port, 116 &attr->active_speed, 117 &attr->active_width); 118 } 119 120 static enum rdma_link_layer ionic_get_link_layer(struct ib_device *ibdev, 121 u32 port) 122 { 123 return IB_LINK_LAYER_ETHERNET; 124 } 125 126 static int ionic_query_pkey(struct ib_device *ibdev, u32 port, u16 index, 127 u16 *pkey) 128 { 129 if (port != 1) 130 return -EINVAL; 131 132 if (index != 0) 133 return -EINVAL; 134 135 *pkey = IB_DEFAULT_PKEY_FULL; 136 137 return 0; 138 } 139 140 static int ionic_modify_device(struct ib_device *ibdev, int mask, 141 struct ib_device_modify *attr) 142 { 143 struct ionic_ibdev *dev = to_ionic_ibdev(ibdev); 144 145 if (mask & ~IB_DEVICE_MODIFY_NODE_DESC) 146 return -EOPNOTSUPP; 147 148 if (mask & IB_DEVICE_MODIFY_NODE_DESC) 149 memcpy(dev->ibdev.node_desc, attr->node_desc, 150 IB_DEVICE_NODE_DESC_MAX); 151 152 return 0; 153 } 154 155 static int ionic_get_port_immutable(struct ib_device *ibdev, u32 port, 156 struct ib_port_immutable *attr) 157 { 158 if (port != 1) 159 return -EINVAL; 160 161 attr->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; 162 163 attr->pkey_tbl_len = IONIC_PKEY_TBL_LEN; 164 attr->gid_tbl_len = IONIC_GID_TBL_LEN; 165 attr->max_mad_size = IB_MGMT_MAD_SIZE; 166 167 return 0; 168 } 169 170 static void ionic_get_dev_fw_str(struct ib_device *ibdev, char *str) 171 { 172 struct ionic_ibdev *dev = to_ionic_ibdev(ibdev); 173 174 ionic_lif_fw_version(dev->lif_cfg.lif, str, IB_FW_VERSION_NAME_MAX); 175 } 176 177 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr, 178 char *buf) 179 { 180 struct ionic_ibdev *dev = 181 rdma_device_to_drv_device(device, struct ionic_ibdev, ibdev); 182 183 return sysfs_emit(buf, "0x%x\n", ionic_lif_asic_rev(dev->lif_cfg.lif)); 184 } 185 static DEVICE_ATTR_RO(hw_rev); 186 187 static ssize_t hca_type_show(struct device *device, 188 struct device_attribute *attr, char *buf) 189 { 190 struct ionic_ibdev *dev = 191 rdma_device_to_drv_device(device, struct ionic_ibdev, ibdev); 192 193 return sysfs_emit(buf, "%.64s\n", dev->ibdev.node_desc); 194 } 195 static DEVICE_ATTR_RO(hca_type); 196 197 static struct attribute *ionic_rdma_attributes[] = { 198 &dev_attr_hw_rev.attr, 199 &dev_attr_hca_type.attr, 200 NULL 201 }; 202 203 static const struct attribute_group ionic_rdma_attr_group = { 204 .attrs = ionic_rdma_attributes, 205 }; 206 207 static void ionic_disassociate_ucontext(struct ib_ucontext *ibcontext) 208 { 209 /* 210 * Dummy define disassociate_ucontext so that it does not 211 * wait for user context before cleaning up hw resources. 212 */ 213 } 214 215 static const struct ib_device_ops ionic_dev_ops = { 216 .owner = THIS_MODULE, 217 .driver_id = RDMA_DRIVER_IONIC, 218 .uverbs_abi_ver = IONIC_ABI_VERSION, 219 .uverbs_robust_udata = true, 220 221 .alloc_ucontext = ionic_alloc_ucontext, 222 .dealloc_ucontext = ionic_dealloc_ucontext, 223 .mmap = ionic_mmap, 224 .mmap_free = ionic_mmap_free, 225 .alloc_pd = ionic_alloc_pd, 226 .dealloc_pd = ionic_dealloc_pd, 227 .create_ah = ionic_create_ah, 228 .query_ah = ionic_query_ah, 229 .destroy_ah = ionic_destroy_ah, 230 .create_user_ah = ionic_create_ah, 231 .get_dma_mr = ionic_get_dma_mr, 232 .reg_user_mr = ionic_reg_user_mr, 233 .reg_user_mr_dmabuf = ionic_reg_user_mr_dmabuf, 234 .dereg_mr = ionic_dereg_mr, 235 .alloc_mr = ionic_alloc_mr, 236 .map_mr_sg = ionic_map_mr_sg, 237 .alloc_mw = ionic_alloc_mw, 238 .dealloc_mw = ionic_dealloc_mw, 239 .create_cq = ionic_create_cq, 240 .destroy_cq = ionic_destroy_cq, 241 .create_qp = ionic_create_qp, 242 .modify_qp = ionic_modify_qp, 243 .query_qp = ionic_query_qp, 244 .destroy_qp = ionic_destroy_qp, 245 246 .post_send = ionic_post_send, 247 .post_recv = ionic_post_recv, 248 .poll_cq = ionic_poll_cq, 249 .req_notify_cq = ionic_req_notify_cq, 250 251 .query_device = ionic_query_device, 252 .query_port = ionic_query_port, 253 .get_link_layer = ionic_get_link_layer, 254 .query_pkey = ionic_query_pkey, 255 .modify_device = ionic_modify_device, 256 .get_port_immutable = ionic_get_port_immutable, 257 .get_dev_fw_str = ionic_get_dev_fw_str, 258 .device_group = &ionic_rdma_attr_group, 259 .disassociate_ucontext = ionic_disassociate_ucontext, 260 261 INIT_RDMA_OBJ_SIZE(ib_ucontext, ionic_ctx, ibctx), 262 INIT_RDMA_OBJ_SIZE(ib_pd, ionic_pd, ibpd), 263 INIT_RDMA_OBJ_SIZE(ib_ah, ionic_ah, ibah), 264 INIT_RDMA_OBJ_SIZE(ib_cq, ionic_vcq, ibcq), 265 INIT_RDMA_OBJ_SIZE(ib_qp, ionic_qp, ibqp), 266 INIT_RDMA_OBJ_SIZE(ib_mw, ionic_mr, ibmw), 267 }; 268 269 static void ionic_init_resids(struct ionic_ibdev *dev) 270 { 271 ionic_resid_init(&dev->inuse_cqid, dev->lif_cfg.cq_count); 272 dev->half_cqid_udma_shift = 273 order_base_2(dev->lif_cfg.cq_count / dev->lif_cfg.udma_count); 274 ionic_resid_init(&dev->inuse_pdid, IONIC_MAX_PD); 275 ionic_resid_init(&dev->inuse_ahid, dev->lif_cfg.nahs_per_lif); 276 ionic_resid_init(&dev->inuse_mrid, dev->lif_cfg.nmrs_per_lif); 277 /* skip reserved lkey */ 278 dev->next_mrkey = 1; 279 ionic_resid_init(&dev->inuse_qpid, dev->lif_cfg.qp_count); 280 /* skip reserved SMI and GSI qpids */ 281 dev->half_qpid_udma_shift = 282 order_base_2(dev->lif_cfg.qp_count / dev->lif_cfg.udma_count); 283 ionic_resid_init(&dev->inuse_dbid, dev->lif_cfg.dbid_count); 284 } 285 286 static void ionic_destroy_resids(struct ionic_ibdev *dev) 287 { 288 ionic_resid_destroy(&dev->inuse_cqid); 289 ionic_resid_destroy(&dev->inuse_pdid); 290 ionic_resid_destroy(&dev->inuse_ahid); 291 ionic_resid_destroy(&dev->inuse_mrid); 292 ionic_resid_destroy(&dev->inuse_qpid); 293 ionic_resid_destroy(&dev->inuse_dbid); 294 } 295 296 static void ionic_destroy_ibdev(struct ionic_ibdev *dev) 297 { 298 ionic_kill_rdma_admin(dev, false); 299 ib_unregister_device(&dev->ibdev); 300 ionic_stats_cleanup(dev); 301 ionic_destroy_rdma_admin(dev); 302 ionic_destroy_resids(dev); 303 WARN_ON(!xa_empty(&dev->qp_tbl)); 304 xa_destroy(&dev->qp_tbl); 305 WARN_ON(!xa_empty(&dev->cq_tbl)); 306 xa_destroy(&dev->cq_tbl); 307 ib_dealloc_device(&dev->ibdev); 308 } 309 310 static struct ionic_ibdev *ionic_create_ibdev(struct ionic_aux_dev *ionic_adev) 311 { 312 struct ib_device *ibdev; 313 struct ionic_ibdev *dev; 314 struct net_device *ndev; 315 int rc; 316 317 dev = ib_alloc_device(ionic_ibdev, ibdev); 318 if (!dev) 319 return ERR_PTR(-EINVAL); 320 321 ionic_fill_lif_cfg(ionic_adev->lif, &dev->lif_cfg); 322 323 xa_init_flags(&dev->qp_tbl, GFP_ATOMIC); 324 xa_init_flags(&dev->cq_tbl, GFP_ATOMIC); 325 326 ionic_init_resids(dev); 327 328 rc = ionic_rdma_reset_devcmd(dev); 329 if (rc) 330 goto err_reset; 331 332 rc = ionic_create_rdma_admin(dev); 333 if (rc) 334 goto err_admin; 335 336 ibdev = &dev->ibdev; 337 ibdev->dev.parent = dev->lif_cfg.hwdev; 338 339 strscpy(ibdev->name, "ionic_%d", IB_DEVICE_NAME_MAX); 340 strscpy(ibdev->node_desc, DEVICE_DESCRIPTION, IB_DEVICE_NODE_DESC_MAX); 341 342 ibdev->node_type = RDMA_NODE_IB_CA; 343 ibdev->phys_port_cnt = 1; 344 345 /* the first two eq are reserved for async events */ 346 ibdev->num_comp_vectors = dev->lif_cfg.eq_count - 2; 347 348 ndev = ionic_lif_netdev(ionic_adev->lif); 349 addrconf_ifid_eui48((u8 *)&ibdev->node_guid, ndev); 350 rc = ib_device_set_netdev(ibdev, ndev, 1); 351 /* ionic_lif_netdev() returns ndev with refcount held */ 352 dev_put(ndev); 353 if (rc) 354 goto err_admin; 355 356 ib_set_device_ops(&dev->ibdev, &ionic_dev_ops); 357 358 ionic_stats_init(dev); 359 360 rc = ib_register_device(ibdev, "ionic_%d", ibdev->dev.parent); 361 if (rc) 362 goto err_register; 363 364 return dev; 365 366 err_register: 367 ionic_stats_cleanup(dev); 368 err_admin: 369 ionic_kill_rdma_admin(dev, false); 370 ionic_destroy_rdma_admin(dev); 371 err_reset: 372 ionic_destroy_resids(dev); 373 xa_destroy(&dev->qp_tbl); 374 xa_destroy(&dev->cq_tbl); 375 ib_dealloc_device(&dev->ibdev); 376 377 return ERR_PTR(rc); 378 } 379 380 static int ionic_aux_probe(struct auxiliary_device *adev, 381 const struct auxiliary_device_id *id) 382 { 383 struct ionic_aux_dev *ionic_adev; 384 struct ionic_ibdev *dev; 385 386 ionic_adev = container_of(adev, struct ionic_aux_dev, adev); 387 dev = ionic_create_ibdev(ionic_adev); 388 if (IS_ERR(dev)) 389 return dev_err_probe(&adev->dev, PTR_ERR(dev), 390 "Failed to register ibdev\n"); 391 392 auxiliary_set_drvdata(adev, dev); 393 ibdev_dbg(&dev->ibdev, "registered\n"); 394 395 return 0; 396 } 397 398 static void ionic_aux_remove(struct auxiliary_device *adev) 399 { 400 struct ionic_ibdev *dev = auxiliary_get_drvdata(adev); 401 402 dev_dbg(&adev->dev, "unregister ibdev\n"); 403 ionic_destroy_ibdev(dev); 404 dev_dbg(&adev->dev, "unregistered\n"); 405 } 406 407 static const struct auxiliary_device_id ionic_aux_id_table[] = { 408 { .name = "ionic.rdma", }, 409 {}, 410 }; 411 412 MODULE_DEVICE_TABLE(auxiliary, ionic_aux_id_table); 413 414 static struct auxiliary_driver ionic_aux_r_driver = { 415 .name = "rdma", 416 .probe = ionic_aux_probe, 417 .remove = ionic_aux_remove, 418 .id_table = ionic_aux_id_table, 419 }; 420 421 static int __init ionic_mod_init(void) 422 { 423 int rc; 424 425 ionic_evt_workq = create_workqueue(KBUILD_MODNAME "-evt"); 426 if (!ionic_evt_workq) 427 return -ENOMEM; 428 429 rc = auxiliary_driver_register(&ionic_aux_r_driver); 430 if (rc) 431 goto err_aux; 432 433 return 0; 434 435 err_aux: 436 destroy_workqueue(ionic_evt_workq); 437 438 return rc; 439 } 440 441 static void __exit ionic_mod_exit(void) 442 { 443 auxiliary_driver_unregister(&ionic_aux_r_driver); 444 destroy_workqueue(ionic_evt_workq); 445 } 446 447 module_init(ionic_mod_init); 448 module_exit(ionic_mod_exit); 449