131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
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/*
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* Copyright(c) 2016 Intel Corporation.
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*/
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#include <rdma/ib_mad.h>
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#include "mad.h"
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#include "vt.h"
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/**
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* rvt_process_mad - process an incoming MAD packet
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* @ibdev: the infiniband device this packet came in on
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* @mad_flags: MAD flags
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* @port_num: the port number this packet came in on, 1 based from ib core
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* @in_wc: the work completion entry for this packet
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* @in_grh: the global route header for this packet
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* @in: the incoming MAD
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* @in_mad_size: size of the incoming MAD reply
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* @out: any outgoing MAD reply
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* @out_mad_size: size of the outgoing MAD reply
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* @out_mad_pkey_index: unused
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*
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* Note that the verbs framework has already done the MAD sanity checks,
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* and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
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* MADs.
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*
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* This is called by the ib_mad module.
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*
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* Return: IB_MAD_RESULT_SUCCESS or error
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*/
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int rvt_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num,
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const struct ib_wc *in_wc, const struct ib_grh *in_grh,
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const struct ib_mad_hdr *in, size_t in_mad_size,
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struct ib_mad_hdr *out, size_t *out_mad_size,
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u16 *out_mad_pkey_index)
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{
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/*
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* MAD processing is quite different between hfi1 and qib. Therefore
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* this is expected to be provided by the driver. Other drivers in the
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* future may choose to implement this but it should not be made into a
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* requirement.
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*/
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return IB_MAD_RESULT_FAILURE;
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}
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static void rvt_send_mad_handler(struct ib_mad_agent *agent,
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struct ib_mad_send_wc *mad_send_wc)
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{
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ib_free_send_mad(mad_send_wc->send_buf);
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}
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/**
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* rvt_create_mad_agents - create mad agents
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* @rdi: rvt dev struct
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*
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* If driver needs to be notified of mad agent creation then call back
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*
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* Return 0 on success
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*/
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int rvt_create_mad_agents(struct rvt_dev_info *rdi)
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{
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struct ib_mad_agent *agent;
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struct rvt_ibport *rvp;
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int p;
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int ret;
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for (p = 0; p < rdi->dparms.nports; p++) {
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rvp = rdi->ports[p];
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agent = ib_register_mad_agent(&rdi->ibdev, p + 1,
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IB_QPT_SMI,
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NULL, 0, rvt_send_mad_handler,
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NULL, NULL, 0);
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if (IS_ERR(agent)) {
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ret = PTR_ERR(agent);
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goto err;
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}
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rvp->send_agent = agent;
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if (rdi->driver_f.notify_create_mad_agent)
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rdi->driver_f.notify_create_mad_agent(rdi, p);
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}
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return 0;
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err:
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for (p = 0; p < rdi->dparms.nports; p++) {
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rvp = rdi->ports[p];
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if (rvp->send_agent) {
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agent = rvp->send_agent;
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rvp->send_agent = NULL;
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ib_unregister_mad_agent(agent);
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if (rdi->driver_f.notify_free_mad_agent)
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rdi->driver_f.notify_free_mad_agent(rdi, p);
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}
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}
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return ret;
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}
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/**
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* rvt_free_mad_agents - free up mad agents
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* @rdi: rvt dev struct
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*
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* If driver needs notification of mad agent removal make the call back
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*/
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void rvt_free_mad_agents(struct rvt_dev_info *rdi)
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{
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struct ib_mad_agent *agent;
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struct rvt_ibport *rvp;
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int p;
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for (p = 0; p < rdi->dparms.nports; p++) {
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rvp = rdi->ports[p];
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if (rvp->send_agent) {
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agent = rvp->send_agent;
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rvp->send_agent = NULL;
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ib_unregister_mad_agent(agent);
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}
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if (rvp->sm_ah) {
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rdma_destroy_ah(&rvp->sm_ah->ibah,
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RDMA_DESTROY_AH_SLEEPABLE);
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rvp->sm_ah = NULL;
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}
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if (rdi->driver_f.notify_free_mad_agent)
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rdi->driver_f.notify_free_mad_agent(rdi, p);
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}
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}
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