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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright(c) 2016 Intel Corporation.4 */5 6#include <rdma/ib_mad.h>7#include "mad.h"8#include "vt.h"9 10/**11 * rvt_process_mad - process an incoming MAD packet12 * @ibdev: the infiniband device this packet came in on13 * @mad_flags: MAD flags14 * @port_num: the port number this packet came in on, 1 based from ib core15 * @in_wc: the work completion entry for this packet16 * @in_grh: the global route header for this packet17 * @in: the incoming MAD18 * @in_mad_size: size of the incoming MAD reply19 * @out: any outgoing MAD reply20 * @out_mad_size: size of the outgoing MAD reply21 * @out_mad_pkey_index: unused22 *23 * Note that the verbs framework has already done the MAD sanity checks,24 * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE25 * MADs.26 *27 * This is called by the ib_mad module.28 *29 * Return: IB_MAD_RESULT_SUCCESS or error30 */31int rvt_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num,32 const struct ib_wc *in_wc, const struct ib_grh *in_grh,33 const struct ib_mad_hdr *in, size_t in_mad_size,34 struct ib_mad_hdr *out, size_t *out_mad_size,35 u16 *out_mad_pkey_index)36{37 /*38 * MAD processing is quite different between hfi1 and qib. Therefore39 * this is expected to be provided by the driver. Other drivers in the40 * future may choose to implement this but it should not be made into a41 * requirement.42 */43 return IB_MAD_RESULT_FAILURE;44}45 46static void rvt_send_mad_handler(struct ib_mad_agent *agent,47 struct ib_mad_send_wc *mad_send_wc)48{49 ib_free_send_mad(mad_send_wc->send_buf);50}51 52/**53 * rvt_create_mad_agents - create mad agents54 * @rdi: rvt dev struct55 *56 * If driver needs to be notified of mad agent creation then call back57 *58 * Return 0 on success59 */60int rvt_create_mad_agents(struct rvt_dev_info *rdi)61{62 struct ib_mad_agent *agent;63 struct rvt_ibport *rvp;64 int p;65 int ret;66 67 for (p = 0; p < rdi->dparms.nports; p++) {68 rvp = rdi->ports[p];69 agent = ib_register_mad_agent(&rdi->ibdev, p + 1,70 IB_QPT_SMI,71 NULL, 0, rvt_send_mad_handler,72 NULL, NULL, 0);73 if (IS_ERR(agent)) {74 ret = PTR_ERR(agent);75 goto err;76 }77 78 rvp->send_agent = agent;79 80 if (rdi->driver_f.notify_create_mad_agent)81 rdi->driver_f.notify_create_mad_agent(rdi, p);82 }83 84 return 0;85 86err:87 for (p = 0; p < rdi->dparms.nports; p++) {88 rvp = rdi->ports[p];89 if (rvp->send_agent) {90 agent = rvp->send_agent;91 rvp->send_agent = NULL;92 ib_unregister_mad_agent(agent);93 if (rdi->driver_f.notify_free_mad_agent)94 rdi->driver_f.notify_free_mad_agent(rdi, p);95 }96 }97 98 return ret;99}100 101/**102 * rvt_free_mad_agents - free up mad agents103 * @rdi: rvt dev struct104 *105 * If driver needs notification of mad agent removal make the call back106 */107void rvt_free_mad_agents(struct rvt_dev_info *rdi)108{109 struct ib_mad_agent *agent;110 struct rvt_ibport *rvp;111 int p;112 113 for (p = 0; p < rdi->dparms.nports; p++) {114 rvp = rdi->ports[p];115 if (rvp->send_agent) {116 agent = rvp->send_agent;117 rvp->send_agent = NULL;118 ib_unregister_mad_agent(agent);119 }120 if (rvp->sm_ah) {121 rdma_destroy_ah(&rvp->sm_ah->ibah,122 RDMA_DESTROY_AH_SLEEPABLE);123 rvp->sm_ah = NULL;124 }125 126 if (rdi->driver_f.notify_free_mad_agent)127 rdi->driver_f.notify_free_mad_agent(rdi, p);128 }129}130 131