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