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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright(c) 2016 - 2018 Intel Corporation.4 */5 6#include <linux/module.h>7#include <linux/kernel.h>8#include <linux/dma-mapping.h>9#include "vt.h"10#include "cq.h"11#include "trace.h"12 13#define RVT_UVERBS_ABI_VERSION 214 15MODULE_LICENSE("Dual BSD/GPL");16MODULE_DESCRIPTION("RDMA Verbs Transport Library");17 18static int __init rvt_init(void)19{20 int ret = rvt_driver_cq_init();21 22 if (ret)23 pr_err("Error in driver CQ init.\n");24 25 return ret;26}27module_init(rvt_init);28 29static void __exit rvt_cleanup(void)30{31 rvt_cq_exit();32}33module_exit(rvt_cleanup);34 35/**36 * rvt_alloc_device - allocate rdi37 * @size: how big of a structure to allocate38 * @nports: number of ports to allocate array slots for39 *40 * Use IB core device alloc to allocate space for the rdi which is assumed to be41 * inside of the ib_device. Any extra space that drivers require should be42 * included in size.43 *44 * We also allocate a port array based on the number of ports.45 *46 * Return: pointer to allocated rdi47 */48struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)49{50 struct rvt_dev_info *rdi;51 52 rdi = container_of(_ib_alloc_device(size), struct rvt_dev_info, ibdev);53 if (!rdi)54 return rdi;55 56 rdi->ports = kcalloc(nports, sizeof(*rdi->ports), GFP_KERNEL);57 if (!rdi->ports)58 ib_dealloc_device(&rdi->ibdev);59 60 return rdi;61}62EXPORT_SYMBOL(rvt_alloc_device);63 64/**65 * rvt_dealloc_device - deallocate rdi66 * @rdi: structure to free67 *68 * Free a structure allocated with rvt_alloc_device()69 */70void rvt_dealloc_device(struct rvt_dev_info *rdi)71{72 kfree(rdi->ports);73 ib_dealloc_device(&rdi->ibdev);74}75EXPORT_SYMBOL(rvt_dealloc_device);76 77static int rvt_query_device(struct ib_device *ibdev,78 struct ib_device_attr *props,79 struct ib_udata *uhw)80{81 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);82 83 if (uhw->inlen || uhw->outlen)84 return -EINVAL;85 /*86 * Return rvt_dev_info.dparms.props contents87 */88 *props = rdi->dparms.props;89 return 0;90}91 92static int rvt_get_numa_node(struct ib_device *ibdev)93{94 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);95 96 return rdi->dparms.node;97}98 99static int rvt_modify_device(struct ib_device *device,100 int device_modify_mask,101 struct ib_device_modify *device_modify)102{103 /*104 * There is currently no need to supply this based on qib and hfi1.105 * Future drivers may need to implement this though.106 */107 108 return -EOPNOTSUPP;109}110 111/**112 * rvt_query_port - Passes the query port call to the driver113 * @ibdev: Verbs IB dev114 * @port_num: port number, 1 based from ib core115 * @props: structure to hold returned properties116 *117 * Return: 0 on success118 */119static int rvt_query_port(struct ib_device *ibdev, u32 port_num,120 struct ib_port_attr *props)121{122 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);123 struct rvt_ibport *rvp;124 u32 port_index = ibport_num_to_idx(ibdev, port_num);125 126 rvp = rdi->ports[port_index];127 /* props being zeroed by the caller, avoid zeroing it here */128 props->sm_lid = rvp->sm_lid;129 props->sm_sl = rvp->sm_sl;130 props->port_cap_flags = rvp->port_cap_flags;131 props->max_msg_sz = 0x80000000;132 props->pkey_tbl_len = rvt_get_npkeys(rdi);133 props->bad_pkey_cntr = rvp->pkey_violations;134 props->qkey_viol_cntr = rvp->qkey_violations;135 props->subnet_timeout = rvp->subnet_timeout;136 props->init_type_reply = 0;137 138 /* Populate the remaining ib_port_attr elements */139 return rdi->driver_f.query_port_state(rdi, port_num, props);140}141 142/**143 * rvt_modify_port - modify port144 * @ibdev: Verbs IB dev145 * @port_num: Port number, 1 based from ib core146 * @port_modify_mask: How to change the port147 * @props: Structure to fill in148 *149 * Return: 0 on success150 */151static int rvt_modify_port(struct ib_device *ibdev, u32 port_num,152 int port_modify_mask, struct ib_port_modify *props)153{154 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);155 struct rvt_ibport *rvp;156 int ret = 0;157 u32 port_index = ibport_num_to_idx(ibdev, port_num);158 159 rvp = rdi->ports[port_index];160 if (port_modify_mask & IB_PORT_OPA_MASK_CHG) {161 rvp->port_cap3_flags |= props->set_port_cap_mask;162 rvp->port_cap3_flags &= ~props->clr_port_cap_mask;163 } else {164 rvp->port_cap_flags |= props->set_port_cap_mask;165 rvp->port_cap_flags &= ~props->clr_port_cap_mask;166 }167 168 if (props->set_port_cap_mask || props->clr_port_cap_mask)169 rdi->driver_f.cap_mask_chg(rdi, port_num);170 if (port_modify_mask & IB_PORT_SHUTDOWN)171 ret = rdi->driver_f.shut_down_port(rdi, port_num);172 if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)173 rvp->qkey_violations = 0;174 175 return ret;176}177 178/**179 * rvt_query_pkey - Return a pkey from the table at a given index180 * @ibdev: Verbs IB dev181 * @port_num: Port number, 1 based from ib core182 * @index: Index into pkey table183 * @pkey: returned pkey from the port pkey table184 *185 * Return: 0 on failure pkey otherwise186 */187static int rvt_query_pkey(struct ib_device *ibdev, u32 port_num, u16 index,188 u16 *pkey)189{190 /*191 * Driver will be responsible for keeping rvt_dev_info.pkey_table up to192 * date. This function will just return that value. There is no need to193 * lock, if a stale value is read and sent to the user so be it there is194 * no way to protect against that anyway.195 */196 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);197 u32 port_index;198 199 port_index = ibport_num_to_idx(ibdev, port_num);200 201 if (index >= rvt_get_npkeys(rdi))202 return -EINVAL;203 204 *pkey = rvt_get_pkey(rdi, port_index, index);205 return 0;206}207 208/**209 * rvt_query_gid - Return a gid from the table210 * @ibdev: Verbs IB dev211 * @port_num: Port number, 1 based from ib core212 * @guid_index: Index in table213 * @gid: Gid to return214 *215 * Return: 0 on success216 */217static int rvt_query_gid(struct ib_device *ibdev, u32 port_num,218 int guid_index, union ib_gid *gid)219{220 struct rvt_dev_info *rdi;221 struct rvt_ibport *rvp;222 u32 port_index;223 224 /*225 * Driver is responsible for updating the guid table. Which will be used226 * to craft the return value. This will work similar to how query_pkey()227 * is being done.228 */229 port_index = ibport_num_to_idx(ibdev, port_num);230 231 rdi = ib_to_rvt(ibdev);232 rvp = rdi->ports[port_index];233 234 gid->global.subnet_prefix = rvp->gid_prefix;235 236 return rdi->driver_f.get_guid_be(rdi, rvp, guid_index,237 &gid->global.interface_id);238}239 240/**241 * rvt_alloc_ucontext - Allocate a user context242 * @uctx: Verbs context243 * @udata: User data allocated244 */245static int rvt_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)246{247 return 0;248}249 250/**251 * rvt_dealloc_ucontext - Free a user context252 * @context: Unused253 */254static void rvt_dealloc_ucontext(struct ib_ucontext *context)255{256 return;257}258 259static int rvt_get_port_immutable(struct ib_device *ibdev, u32 port_num,260 struct ib_port_immutable *immutable)261{262 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);263 struct ib_port_attr attr;264 int err;265 266 immutable->core_cap_flags = rdi->dparms.core_cap_flags;267 268 err = ib_query_port(ibdev, port_num, &attr);269 if (err)270 return err;271 272 immutable->pkey_tbl_len = attr.pkey_tbl_len;273 immutable->gid_tbl_len = attr.gid_tbl_len;274 immutable->max_mad_size = rdi->dparms.max_mad_size;275 276 return 0;277}278 279enum {280 MISC,281 QUERY_DEVICE,282 MODIFY_DEVICE,283 QUERY_PORT,284 MODIFY_PORT,285 QUERY_PKEY,286 QUERY_GID,287 ALLOC_UCONTEXT,288 DEALLOC_UCONTEXT,289 GET_PORT_IMMUTABLE,290 CREATE_QP,291 MODIFY_QP,292 DESTROY_QP,293 QUERY_QP,294 POST_SEND,295 POST_RECV,296 POST_SRQ_RECV,297 CREATE_AH,298 DESTROY_AH,299 MODIFY_AH,300 QUERY_AH,301 CREATE_SRQ,302 MODIFY_SRQ,303 DESTROY_SRQ,304 QUERY_SRQ,305 ATTACH_MCAST,306 DETACH_MCAST,307 GET_DMA_MR,308 REG_USER_MR,309 DEREG_MR,310 ALLOC_MR,311 MAP_MR_SG,312 ALLOC_FMR,313 MAP_PHYS_FMR,314 UNMAP_FMR,315 DEALLOC_FMR,316 MMAP,317 CREATE_CQ,318 DESTROY_CQ,319 POLL_CQ,320 REQ_NOTFIY_CQ,321 RESIZE_CQ,322 ALLOC_PD,323 DEALLOC_PD,324 _VERB_IDX_MAX /* Must always be last! */325};326 327static const struct ib_device_ops rvt_dev_ops = {328 .uverbs_abi_ver = RVT_UVERBS_ABI_VERSION,329 330 .alloc_mr = rvt_alloc_mr,331 .alloc_pd = rvt_alloc_pd,332 .alloc_ucontext = rvt_alloc_ucontext,333 .attach_mcast = rvt_attach_mcast,334 .create_ah = rvt_create_ah,335 .create_cq = rvt_create_cq,336 .create_qp = rvt_create_qp,337 .create_srq = rvt_create_srq,338 .create_user_ah = rvt_create_ah,339 .dealloc_pd = rvt_dealloc_pd,340 .dealloc_ucontext = rvt_dealloc_ucontext,341 .dereg_mr = rvt_dereg_mr,342 .destroy_ah = rvt_destroy_ah,343 .destroy_cq = rvt_destroy_cq,344 .destroy_qp = rvt_destroy_qp,345 .destroy_srq = rvt_destroy_srq,346 .detach_mcast = rvt_detach_mcast,347 .get_dma_mr = rvt_get_dma_mr,348 .get_numa_node = rvt_get_numa_node,349 .get_port_immutable = rvt_get_port_immutable,350 .map_mr_sg = rvt_map_mr_sg,351 .mmap = rvt_mmap,352 .modify_ah = rvt_modify_ah,353 .modify_device = rvt_modify_device,354 .modify_port = rvt_modify_port,355 .modify_qp = rvt_modify_qp,356 .modify_srq = rvt_modify_srq,357 .poll_cq = rvt_poll_cq,358 .post_recv = rvt_post_recv,359 .post_send = rvt_post_send,360 .post_srq_recv = rvt_post_srq_recv,361 .query_ah = rvt_query_ah,362 .query_device = rvt_query_device,363 .query_gid = rvt_query_gid,364 .query_pkey = rvt_query_pkey,365 .query_port = rvt_query_port,366 .query_qp = rvt_query_qp,367 .query_srq = rvt_query_srq,368 .reg_user_mr = rvt_reg_user_mr,369 .req_notify_cq = rvt_req_notify_cq,370 .resize_cq = rvt_resize_cq,371 372 INIT_RDMA_OBJ_SIZE(ib_ah, rvt_ah, ibah),373 INIT_RDMA_OBJ_SIZE(ib_cq, rvt_cq, ibcq),374 INIT_RDMA_OBJ_SIZE(ib_pd, rvt_pd, ibpd),375 INIT_RDMA_OBJ_SIZE(ib_qp, rvt_qp, ibqp),376 INIT_RDMA_OBJ_SIZE(ib_srq, rvt_srq, ibsrq),377 INIT_RDMA_OBJ_SIZE(ib_ucontext, rvt_ucontext, ibucontext),378};379 380static noinline int check_support(struct rvt_dev_info *rdi, int verb)381{382 switch (verb) {383 case MISC:384 /*385 * These functions are not part of verbs specifically but are386 * required for rdmavt to function.387 */388 if ((!rdi->ibdev.ops.port_groups) ||389 (!rdi->driver_f.get_pci_dev))390 return -EINVAL;391 break;392 393 case MODIFY_DEVICE:394 /*395 * rdmavt does not support modify device currently drivers must396 * provide.397 */398 if (!rdi->ibdev.ops.modify_device)399 return -EOPNOTSUPP;400 break;401 402 case QUERY_PORT:403 if (!rdi->ibdev.ops.query_port)404 if (!rdi->driver_f.query_port_state)405 return -EINVAL;406 break;407 408 case MODIFY_PORT:409 if (!rdi->ibdev.ops.modify_port)410 if (!rdi->driver_f.cap_mask_chg ||411 !rdi->driver_f.shut_down_port)412 return -EINVAL;413 break;414 415 case QUERY_GID:416 if (!rdi->ibdev.ops.query_gid)417 if (!rdi->driver_f.get_guid_be)418 return -EINVAL;419 break;420 421 case CREATE_QP:422 if (!rdi->ibdev.ops.create_qp)423 if (!rdi->driver_f.qp_priv_alloc ||424 !rdi->driver_f.qp_priv_free ||425 !rdi->driver_f.notify_qp_reset ||426 !rdi->driver_f.flush_qp_waiters ||427 !rdi->driver_f.stop_send_queue ||428 !rdi->driver_f.quiesce_qp)429 return -EINVAL;430 break;431 432 case MODIFY_QP:433 if (!rdi->ibdev.ops.modify_qp)434 if (!rdi->driver_f.notify_qp_reset ||435 !rdi->driver_f.schedule_send ||436 !rdi->driver_f.get_pmtu_from_attr ||437 !rdi->driver_f.flush_qp_waiters ||438 !rdi->driver_f.stop_send_queue ||439 !rdi->driver_f.quiesce_qp ||440 !rdi->driver_f.notify_error_qp ||441 !rdi->driver_f.mtu_from_qp ||442 !rdi->driver_f.mtu_to_path_mtu)443 return -EINVAL;444 break;445 446 case DESTROY_QP:447 if (!rdi->ibdev.ops.destroy_qp)448 if (!rdi->driver_f.qp_priv_free ||449 !rdi->driver_f.notify_qp_reset ||450 !rdi->driver_f.flush_qp_waiters ||451 !rdi->driver_f.stop_send_queue ||452 !rdi->driver_f.quiesce_qp)453 return -EINVAL;454 break;455 456 case POST_SEND:457 if (!rdi->ibdev.ops.post_send)458 if (!rdi->driver_f.schedule_send ||459 !rdi->driver_f.do_send ||460 !rdi->post_parms)461 return -EINVAL;462 break;463 464 }465 466 return 0;467}468 469/**470 * rvt_register_device - register a driver471 * @rdi: main dev structure for all of rdmavt operations472 *473 * It is up to drivers to allocate the rdi and fill in the appropriate474 * information.475 *476 * Return: 0 on success otherwise an errno.477 */478int rvt_register_device(struct rvt_dev_info *rdi)479{480 int ret = 0, i;481 482 if (!rdi)483 return -EINVAL;484 485 /*486 * Check to ensure drivers have setup the required helpers for the verbs487 * they want rdmavt to handle488 */489 for (i = 0; i < _VERB_IDX_MAX; i++)490 if (check_support(rdi, i)) {491 pr_err("Driver support req not met at %d\n", i);492 return -EINVAL;493 }494 495 ib_set_device_ops(&rdi->ibdev, &rvt_dev_ops);496 497 /* Once we get past here we can use rvt_pr macros and tracepoints */498 trace_rvt_dbg(rdi, "Driver attempting registration");499 rvt_mmap_init(rdi);500 501 /* Queue Pairs */502 ret = rvt_driver_qp_init(rdi);503 if (ret) {504 pr_err("Error in driver QP init.\n");505 return -EINVAL;506 }507 508 /* Address Handle */509 spin_lock_init(&rdi->n_ahs_lock);510 rdi->n_ahs_allocated = 0;511 512 /* Shared Receive Queue */513 rvt_driver_srq_init(rdi);514 515 /* Multicast */516 rvt_driver_mcast_init(rdi);517 518 /* Mem Region */519 ret = rvt_driver_mr_init(rdi);520 if (ret) {521 pr_err("Error in driver MR init.\n");522 goto bail_no_mr;523 }524 525 /* Memory Working Set Size */526 ret = rvt_wss_init(rdi);527 if (ret) {528 rvt_pr_err(rdi, "Error in WSS init.\n");529 goto bail_mr;530 }531 532 /* Completion queues */533 spin_lock_init(&rdi->n_cqs_lock);534 535 /* Protection Domain */536 spin_lock_init(&rdi->n_pds_lock);537 rdi->n_pds_allocated = 0;538 539 /*540 * There are some things which could be set by underlying drivers but541 * really should be up to rdmavt to set. For instance drivers can't know542 * exactly which functions rdmavt supports, nor do they know the ABI543 * version, so we do all of this sort of stuff here.544 */545 rdi->ibdev.uverbs_cmd_mask |=546 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |547 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |548 (1ull << IB_USER_VERBS_CMD_POST_SEND) |549 (1ull << IB_USER_VERBS_CMD_POST_RECV) |550 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);551 rdi->ibdev.node_type = RDMA_NODE_IB_CA;552 if (!rdi->ibdev.num_comp_vectors)553 rdi->ibdev.num_comp_vectors = 1;554 555 /* We are now good to announce we exist */556 ret = ib_register_device(&rdi->ibdev, dev_name(&rdi->ibdev.dev), NULL);557 if (ret) {558 rvt_pr_err(rdi, "Failed to register driver with ib core.\n");559 goto bail_wss;560 }561 562 rvt_create_mad_agents(rdi);563 564 rvt_pr_info(rdi, "Registration with rdmavt done.\n");565 return ret;566 567bail_wss:568 rvt_wss_exit(rdi);569bail_mr:570 rvt_mr_exit(rdi);571 572bail_no_mr:573 rvt_qp_exit(rdi);574 575 return ret;576}577EXPORT_SYMBOL(rvt_register_device);578 579/**580 * rvt_unregister_device - remove a driver581 * @rdi: rvt dev struct582 */583void rvt_unregister_device(struct rvt_dev_info *rdi)584{585 trace_rvt_dbg(rdi, "Driver is unregistering.");586 if (!rdi)587 return;588 589 rvt_free_mad_agents(rdi);590 591 ib_unregister_device(&rdi->ibdev);592 rvt_wss_exit(rdi);593 rvt_mr_exit(rdi);594 rvt_qp_exit(rdi);595}596EXPORT_SYMBOL(rvt_unregister_device);597 598/**599 * rvt_init_port - init internal data for driver port600 * @rdi: rvt_dev_info struct601 * @port: rvt port602 * @port_index: 0 based index of ports, different from IB core port num603 * @pkey_table: pkey_table for @port604 *605 * Keep track of a list of ports. No need to have a detach port.606 * They persist until the driver goes away.607 *608 * Return: always 0609 */610int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,611 int port_index, u16 *pkey_table)612{613 614 rdi->ports[port_index] = port;615 rdi->ports[port_index]->pkey_table = pkey_table;616 617 return 0;618}619EXPORT_SYMBOL(rvt_init_port);620