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OpenCloudOS-Kernel/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c

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/*
* Copyright(c) 2017 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* This file contains OPA Virtual Network Interface Controller (VNIC)
* Ethernet Management Agent (EMA) driver
*/
#include <linux/module.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_verbs.h>
#include <rdma/opa_smi.h>
#include <rdma/opa_port_info.h>
#include "opa_vnic_internal.h"
#define DRV_VERSION "1.0"
char opa_vnic_driver_name[] = "opa_vnic";
const char opa_vnic_driver_version[] = DRV_VERSION;
/*
* The trap service level is kept in bits 3 to 7 in the trap_sl_rsvd
* field in the class port info MAD.
*/
#define GET_TRAP_SL_FROM_CLASS_PORT_INFO(x) (((x) >> 3) & 0x1f)
/* Cap trap bursts to a reasonable limit good for normal cases */
#define OPA_VNIC_TRAP_BURST_LIMIT 4
/*
* VNIC trap limit timeout.
* Inverse of cap2_mask response time out (1.0737 secs) = 0.9
* secs approx IB spec 13.4.6.2.1 PortInfoSubnetTimeout and
* 13.4.9 Traps.
*/
#define OPA_VNIC_TRAP_TIMEOUT ((4096 * (1UL << 18)) / 1000)
#define OPA_VNIC_UNSUP_ATTR \
cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB)
#define OPA_VNIC_INVAL_ATTR \
cpu_to_be16(IB_MGMT_MAD_STATUS_INVALID_ATTRIB_VALUE)
#define OPA_VNIC_CLASS_CAP_TRAP 0x1
/* Maximum number of VNIC ports supported */
#define OPA_VNIC_MAX_NUM_VPORT 255
/**
* struct opa_vnic_vema_port -- VNIC VEMA port details
* @cport: pointer to port
* @mad_agent: pointer to mad agent for port
* @class_port_info: Class port info information.
* @tid: Transaction id
* @port_num: OPA port number
* @vport_idr: vnic ports idr
* @event_handler: ib event handler
* @lock: adapter interface lock
*/
struct opa_vnic_vema_port {
struct opa_vnic_ctrl_port *cport;
struct ib_mad_agent *mad_agent;
struct opa_class_port_info class_port_info;
u64 tid;
u8 port_num;
struct idr vport_idr;
struct ib_event_handler event_handler;
/* Lock to query/update network adapter */
struct mutex lock;
};
static void opa_vnic_vema_add_one(struct ib_device *device);
static void opa_vnic_vema_rem_one(struct ib_device *device,
void *client_data);
static struct ib_client opa_vnic_client = {
.name = opa_vnic_driver_name,
.add = opa_vnic_vema_add_one,
.remove = opa_vnic_vema_rem_one,
};
/**
* vema_get_vport_num -- Get the vnic from the mad
* @recvd_mad: Received mad
*
* Return: returns value of the vnic port number
*/
static inline u8 vema_get_vport_num(struct opa_vnic_vema_mad *recvd_mad)
{
return be32_to_cpu(recvd_mad->mad_hdr.attr_mod) & 0xff;
}
/**
* vema_get_vport_adapter -- Get vnic port adapter from recvd mad
* @recvd_mad: received mad
* @port: ptr to port struct on which MAD was recvd
*
* Return: vnic adapter
*/
static inline struct opa_vnic_adapter *
vema_get_vport_adapter(struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_port *port)
{
u8 vport_num = vema_get_vport_num(recvd_mad);
return idr_find(&port->vport_idr, vport_num);
}
/**
* vema_mac_tbl_req_ok -- Check if mac request has correct values
* @mac_tbl: mac table
*
* This function checks for the validity of the offset and number of
* entries required.
*
* Return: true if offset and num_entries are valid
*/
static inline bool vema_mac_tbl_req_ok(struct opa_veswport_mactable *mac_tbl)
{
u16 offset, num_entries;
u16 req_entries = ((OPA_VNIC_EMA_DATA - sizeof(*mac_tbl)) /
sizeof(mac_tbl->tbl_entries[0]));
offset = be16_to_cpu(mac_tbl->offset);
num_entries = be16_to_cpu(mac_tbl->num_entries);
return ((num_entries <= req_entries) &&
(offset + num_entries <= OPA_VNIC_MAC_TBL_MAX_ENTRIES));
}
/*
* Return the power on default values in the port info structure
* in big endian format as required by MAD.
*/
static inline void vema_get_pod_values(struct opa_veswport_info *port_info)
{
memset(port_info, 0, sizeof(*port_info));
port_info->vport.max_mac_tbl_ent =
cpu_to_be16(OPA_VNIC_MAC_TBL_MAX_ENTRIES);
port_info->vport.max_smac_ent =
cpu_to_be16(OPA_VNIC_MAX_SMAC_LIMIT);
port_info->vport.oper_state = OPA_VNIC_STATE_DROP_ALL;
port_info->vport.config_state = OPA_VNIC_STATE_DROP_ALL;
}
/**
* vema_add_vport -- Add a new vnic port
* @port: ptr to opa_vnic_vema_port struct
* @vport_num: vnic port number (to be added)
*
* Return a pointer to the vnic adapter structure
*/
static struct opa_vnic_adapter *vema_add_vport(struct opa_vnic_vema_port *port,
u8 vport_num)
{
struct opa_vnic_ctrl_port *cport = port->cport;
struct opa_vnic_adapter *adapter;
adapter = opa_vnic_add_netdev(cport->ibdev, port->port_num, vport_num);
if (!IS_ERR(adapter)) {
int rc;
adapter->cport = cport;
rc = idr_alloc(&port->vport_idr, adapter, vport_num,
vport_num + 1, GFP_NOWAIT);
if (rc < 0) {
opa_vnic_rem_netdev(adapter);
adapter = ERR_PTR(rc);
}
}
return adapter;
}
/**
* vema_get_class_port_info -- Get class info for port
* @port: Port on whic MAD was received
* @recvd_mad: pointer to the received mad
* @rsp_mad: pointer to respose mad
*
* This function copies the latest class port info value set for the
* port and stores it for generating traps
*/
static void vema_get_class_port_info(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_class_port_info *port_info;
port_info = (struct opa_class_port_info *)rsp_mad->data;
memcpy(port_info, &port->class_port_info, sizeof(*port_info));
port_info->base_version = OPA_MGMT_BASE_VERSION,
port_info->class_version = OPA_EMA_CLASS_VERSION;
/*
* Set capability mask bit indicating agent generates traps,
* and set the maximum number of VNIC ports supported.
*/
port_info->cap_mask = cpu_to_be16((OPA_VNIC_CLASS_CAP_TRAP |
(OPA_VNIC_MAX_NUM_VPORT << 8)));
/*
* Since a get routine is always sent by the EM first we
* set the expected response time to
* 4.096 usec * 2^18 == 1.0737 sec here.
*/
port_info->cap_mask2_resp_time = cpu_to_be32(18);
}
/**
* vema_set_class_port_info -- Get class info for port
* @port: Port on whic MAD was received
* @recvd_mad: pointer to the received mad
* @rsp_mad: pointer to respose mad
*
* This function updates the port class info for the specific vnic
* and sets up the response mad data
*/
static void vema_set_class_port_info(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
memcpy(&port->class_port_info, recvd_mad->data,
sizeof(port->class_port_info));
vema_get_class_port_info(port, recvd_mad, rsp_mad);
}
/**
* vema_get_veswport_info -- Get veswport info
* @port: source port on which MAD was received
* @recvd_mad: pointer to the received mad
* @rsp_mad: pointer to respose mad
*/
static void vema_get_veswport_info(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_veswport_info *port_info =
(struct opa_veswport_info *)rsp_mad->data;
struct opa_vnic_adapter *adapter;
adapter = vema_get_vport_adapter(recvd_mad, port);
if (adapter) {
memset(port_info, 0, sizeof(*port_info));
opa_vnic_get_vesw_info(adapter, &port_info->vesw);
opa_vnic_get_per_veswport_info(adapter,
&port_info->vport);
} else {
vema_get_pod_values(port_info);
}
}
/**
* vema_set_veswport_info -- Set veswport info
* @port: source port on which MAD was received
* @recvd_mad: pointer to the received mad
* @rsp_mad: pointer to respose mad
*
* This function gets the port class infor for vnic
*/
static void vema_set_veswport_info(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_vnic_ctrl_port *cport = port->cport;
struct opa_veswport_info *port_info;
struct opa_vnic_adapter *adapter;
u8 vport_num;
vport_num = vema_get_vport_num(recvd_mad);
adapter = vema_get_vport_adapter(recvd_mad, port);
if (!adapter) {
adapter = vema_add_vport(port, vport_num);
if (IS_ERR(adapter)) {
c_err("failed to add vport %d: %ld\n",
vport_num, PTR_ERR(adapter));
goto err_exit;
}
}
port_info = (struct opa_veswport_info *)recvd_mad->data;
opa_vnic_set_vesw_info(adapter, &port_info->vesw);
opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
/* Process the new config settings */
opa_vnic_process_vema_config(adapter);
vema_get_veswport_info(port, recvd_mad, rsp_mad);
return;
err_exit:
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
}
/**
* vema_get_mac_entries -- Get MAC entries in VNIC MAC table
* @port: source port on which MAD was received
* @recvd_mad: pointer to the received mad
* @rsp_mad: pointer to respose mad
*
* This function gets the MAC entries that are programmed into
* the VNIC MAC forwarding table. It checks for the validity of
* the index into the MAC table and the number of entries that
* are to be retrieved.
*/
static void vema_get_mac_entries(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_veswport_mactable *mac_tbl_in, *mac_tbl_out;
struct opa_vnic_adapter *adapter;
adapter = vema_get_vport_adapter(recvd_mad, port);
if (!adapter) {
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
return;
}
mac_tbl_in = (struct opa_veswport_mactable *)recvd_mad->data;
mac_tbl_out = (struct opa_veswport_mactable *)rsp_mad->data;
if (vema_mac_tbl_req_ok(mac_tbl_in)) {
mac_tbl_out->offset = mac_tbl_in->offset;
mac_tbl_out->num_entries = mac_tbl_in->num_entries;
opa_vnic_query_mac_tbl(adapter, mac_tbl_out);
} else {
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
}
}
/**
* vema_set_mac_entries -- Set MAC entries in VNIC MAC table
* @port: source port on which MAD was received
* @recvd_mad: pointer to the received mad
* @rsp_mad: pointer to respose mad
*
* This function sets the MAC entries in the VNIC forwarding table
* It checks for the validity of the index and the number of forwarding
* table entries to be programmed.
*/
static void vema_set_mac_entries(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_veswport_mactable *mac_tbl;
struct opa_vnic_adapter *adapter;
adapter = vema_get_vport_adapter(recvd_mad, port);
if (!adapter) {
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
return;
}
mac_tbl = (struct opa_veswport_mactable *)recvd_mad->data;
if (vema_mac_tbl_req_ok(mac_tbl)) {
if (opa_vnic_update_mac_tbl(adapter, mac_tbl))
rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
} else {
rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
}
vema_get_mac_entries(port, recvd_mad, rsp_mad);
}
/**
* vema_set_delete_vesw -- Reset VESW info to POD values
* @port: source port on which MAD was received
* @recvd_mad: pointer to the received mad
* @rsp_mad: pointer to respose mad
*
* This function clears all the fields of veswport info for the requested vesw
* and sets them back to the power-on default values. It does not delete the
* vesw.
*/
static void vema_set_delete_vesw(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_veswport_info *port_info =
(struct opa_veswport_info *)rsp_mad->data;
struct opa_vnic_adapter *adapter;
adapter = vema_get_vport_adapter(recvd_mad, port);
if (!adapter) {
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
return;
}
vema_get_pod_values(port_info);
opa_vnic_set_vesw_info(adapter, &port_info->vesw);
opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
/* Process the new config settings */
opa_vnic_process_vema_config(adapter);
opa_vnic_release_mac_tbl(adapter);
vema_get_veswport_info(port, recvd_mad, rsp_mad);
}
/**
* vema_get_mac_list -- Get the unicast/multicast macs.
* @port: source port on which MAD was received
* @recvd_mad: Received mad contains fields to set vnic parameters
* @rsp_mad: Response mad to be built
* @attr_id: Attribute ID indicating multicast or unicast mac list
*/
static void vema_get_mac_list(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad,
u16 attr_id)
{
struct opa_veswport_iface_macs *macs_in, *macs_out;
int max_entries = (OPA_VNIC_EMA_DATA - sizeof(*macs_out)) / ETH_ALEN;
struct opa_vnic_adapter *adapter;
adapter = vema_get_vport_adapter(recvd_mad, port);
if (!adapter) {
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
return;
}
macs_in = (struct opa_veswport_iface_macs *)recvd_mad->data;
macs_out = (struct opa_veswport_iface_macs *)rsp_mad->data;
macs_out->start_idx = macs_in->start_idx;
if (macs_in->num_macs_in_msg)
macs_out->num_macs_in_msg = macs_in->num_macs_in_msg;
else
macs_out->num_macs_in_msg = cpu_to_be16(max_entries);
if (attr_id == OPA_EM_ATTR_IFACE_MCAST_MACS)
opa_vnic_query_mcast_macs(adapter, macs_out);
else
opa_vnic_query_ucast_macs(adapter, macs_out);
}
/**
* vema_get_summary_counters -- Gets summary counters.
* @port: source port on which MAD was received
* @recvd_mad: Received mad contains fields to set vnic parameters
* @rsp_mad: Response mad to be built
*/
static void vema_get_summary_counters(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_veswport_summary_counters *cntrs;
struct opa_vnic_adapter *adapter;
adapter = vema_get_vport_adapter(recvd_mad, port);
if (adapter) {
cntrs = (struct opa_veswport_summary_counters *)rsp_mad->data;
opa_vnic_get_summary_counters(adapter, cntrs);
} else {
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
}
}
/**
* vema_get_error_counters -- Gets summary counters.
* @port: source port on which MAD was received
* @recvd_mad: Received mad contains fields to set vnic parameters
* @rsp_mad: Response mad to be built
*/
static void vema_get_error_counters(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
struct opa_veswport_error_counters *cntrs;
struct opa_vnic_adapter *adapter;
adapter = vema_get_vport_adapter(recvd_mad, port);
if (adapter) {
cntrs = (struct opa_veswport_error_counters *)rsp_mad->data;
opa_vnic_get_error_counters(adapter, cntrs);
} else {
rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
}
}
/**
* vema_get -- Process received get MAD
* @port: source port on which MAD was received
* @recvd_mad: Received mad
* @rsp_mad: Response mad to be built
*/
static void vema_get(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
switch (attr_id) {
case OPA_EM_ATTR_CLASS_PORT_INFO:
vema_get_class_port_info(port, recvd_mad, rsp_mad);
break;
case OPA_EM_ATTR_VESWPORT_INFO:
vema_get_veswport_info(port, recvd_mad, rsp_mad);
break;
case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
vema_get_mac_entries(port, recvd_mad, rsp_mad);
break;
case OPA_EM_ATTR_IFACE_UCAST_MACS:
/* fall through */
case OPA_EM_ATTR_IFACE_MCAST_MACS:
vema_get_mac_list(port, recvd_mad, rsp_mad, attr_id);
break;
case OPA_EM_ATTR_VESWPORT_SUMMARY_COUNTERS:
vema_get_summary_counters(port, recvd_mad, rsp_mad);
break;
case OPA_EM_ATTR_VESWPORT_ERROR_COUNTERS:
vema_get_error_counters(port, recvd_mad, rsp_mad);
break;
default:
rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
break;
}
}
/**
* vema_set -- Process received set MAD
* @port: source port on which MAD was received
* @recvd_mad: Received mad contains fields to set vnic parameters
* @rsp_mad: Response mad to be built
*/
static void vema_set(struct opa_vnic_vema_port *port,
struct opa_vnic_vema_mad *recvd_mad,
struct opa_vnic_vema_mad *rsp_mad)
{
u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
switch (attr_id) {
case OPA_EM_ATTR_CLASS_PORT_INFO:
vema_set_class_port_info(port, recvd_mad, rsp_mad);
break;
case OPA_EM_ATTR_VESWPORT_INFO:
vema_set_veswport_info(port, recvd_mad, rsp_mad);
break;
case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
vema_set_mac_entries(port, recvd_mad, rsp_mad);
break;
case OPA_EM_ATTR_DELETE_VESW:
vema_set_delete_vesw(port, recvd_mad, rsp_mad);
break;
default:
rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
break;
}
}
/**
* vema_send -- Send handler for VEMA MAD agent
* @mad_agent: pointer to the mad agent
* @mad_wc: pointer to mad send work completion information
*
* Free all the data structures associated with the sent MAD
*/
static void vema_send(struct ib_mad_agent *mad_agent,
struct ib_mad_send_wc *mad_wc)
{
rdma_destroy_ah(mad_wc->send_buf->ah);
ib_free_send_mad(mad_wc->send_buf);
}
/**
* vema_recv -- Recv handler for VEMA MAD agent
* @mad_agent: pointer to the mad agent
* @send_buf: Send buffer if found, else NULL
* @mad_wc: pointer to mad send work completion information
*
* Handle only set and get methods and respond to other methods
* as unsupported. Allocate response buffer and address handle
* for the response MAD.
*/
static void vema_recv(struct ib_mad_agent *mad_agent,
struct ib_mad_send_buf *send_buf,
struct ib_mad_recv_wc *mad_wc)
{
struct opa_vnic_vema_port *port;
struct ib_ah *ah;
struct ib_mad_send_buf *rsp;
struct opa_vnic_vema_mad *vema_mad;
if (!mad_wc || !mad_wc->recv_buf.mad)
return;
port = mad_agent->context;
ah = ib_create_ah_from_wc(mad_agent->qp->pd, mad_wc->wc,
mad_wc->recv_buf.grh, mad_agent->port_num);
if (IS_ERR(ah))
goto free_recv_mad;
rsp = ib_create_send_mad(mad_agent, mad_wc->wc->src_qp,
mad_wc->wc->pkey_index, 0,
IB_MGMT_VENDOR_HDR, OPA_VNIC_EMA_DATA,
GFP_KERNEL, OPA_MGMT_BASE_VERSION);
if (IS_ERR(rsp))
goto err_rsp;
rsp->ah = ah;
vema_mad = rsp->mad;
memcpy(vema_mad, mad_wc->recv_buf.mad, IB_MGMT_VENDOR_HDR);
vema_mad->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
vema_mad->mad_hdr.status = 0;
/* Lock ensures network adapter is not removed */
mutex_lock(&port->lock);
switch (mad_wc->recv_buf.mad->mad_hdr.method) {
case IB_MGMT_METHOD_GET:
vema_get(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
vema_mad);
break;
case IB_MGMT_METHOD_SET:
vema_set(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
vema_mad);
break;
default:
vema_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
break;
}
mutex_unlock(&port->lock);
if (!ib_post_send_mad(rsp, NULL)) {
/*
* with post send successful ah and send mad
* will be destroyed in send handler
*/
goto free_recv_mad;
}
ib_free_send_mad(rsp);
err_rsp:
rdma_destroy_ah(ah);
free_recv_mad:
ib_free_recv_mad(mad_wc);
}
/**
* vema_get_port -- Gets the opa_vnic_vema_port
* @cport: pointer to control dev
* @port_num: Port number
*
* This function loops through the ports and returns
* the opa_vnic_vema port structure that is associated
* with the OPA port number
*
* Return: ptr to requested opa_vnic_vema_port strucure
* if success, NULL if not
*/
static struct opa_vnic_vema_port *
vema_get_port(struct opa_vnic_ctrl_port *cport, u8 port_num)
{
struct opa_vnic_vema_port *port = (void *)cport + sizeof(*cport);
if (port_num > cport->num_ports)
return NULL;
return port + (port_num - 1);
}
/**
* opa_vnic_vema_send_trap -- This function sends a trap to the EM
* @cport: pointer to vnic control port
* @data: pointer to trap data filled by calling function
* @lid: issuers lid (encap_slid from vesw_port_info)
*
* This function is called from the VNIC driver to send a trap if there
* is somethng the EM should be notified about. These events currently
* are
* 1) UNICAST INTERFACE MACADDRESS changes
* 2) MULTICAST INTERFACE MACADDRESS changes
* 3) ETHERNET LINK STATUS changes
* While allocating the send mad the remote site qpn used is 1
* as this is the well known QP.
*
*/
void opa_vnic_vema_send_trap(struct opa_vnic_adapter *adapter,
struct __opa_veswport_trap *data, u32 lid)
{
struct opa_vnic_ctrl_port *cport = adapter->cport;
struct ib_mad_send_buf *send_buf;
struct opa_vnic_vema_port *port;
struct ib_device *ibp;
struct opa_vnic_vema_mad_trap *trap_mad;
struct opa_class_port_info *class;
struct rdma_ah_attr ah_attr;
struct ib_ah *ah;
struct opa_veswport_trap *trap;
u32 trap_lid;
u16 pkey_idx;
if (!cport)
goto err_exit;
ibp = cport->ibdev;
port = vema_get_port(cport, data->opaportnum);
if (!port || !port->mad_agent)
goto err_exit;
if (time_before(jiffies, adapter->trap_timeout)) {
if (adapter->trap_count == OPA_VNIC_TRAP_BURST_LIMIT) {
v_warn("Trap rate exceeded\n");
goto err_exit;
} else {
adapter->trap_count++;
}
} else {
adapter->trap_count = 0;
}
class = &port->class_port_info;
/* Set up address handle */
memset(&ah_attr, 0, sizeof(ah_attr));
ah_attr.type = rdma_ah_find_type(ibp, port->port_num);
rdma_ah_set_sl(&ah_attr,
GET_TRAP_SL_FROM_CLASS_PORT_INFO(class->trap_sl_rsvd));
rdma_ah_set_port_num(&ah_attr, port->port_num);
trap_lid = be32_to_cpu(class->trap_lid);
/*
* check for trap lid validity, must not be zero
* The trap sink could change after we fashion the MAD but since traps
* are not guaranteed we won't use a lock as anyway the change will take
* place even with locking.
*/
if (!trap_lid) {
c_err("%s: Invalid dlid\n", __func__);
goto err_exit;
}
rdma_ah_set_dlid(&ah_attr, trap_lid);
ah = rdma_create_ah(port->mad_agent->qp->pd, &ah_attr);
if (IS_ERR(ah)) {
c_err("%s:Couldn't create new AH = %p\n", __func__, ah);
c_err("%s:dlid = %d, sl = %d, port = %d\n", __func__,
rdma_ah_get_dlid(&ah_attr), rdma_ah_get_sl(&ah_attr),
rdma_ah_get_port_num(&ah_attr));
goto err_exit;
}
if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_FULL,
&pkey_idx) < 0) {
c_err("%s:full key not found, defaulting to partial\n",
__func__);
if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_PARTIAL,
&pkey_idx) < 0)
pkey_idx = 1;
}
send_buf = ib_create_send_mad(port->mad_agent, 1, pkey_idx, 0,
IB_MGMT_VENDOR_HDR, IB_MGMT_MAD_DATA,
GFP_ATOMIC, OPA_MGMT_BASE_VERSION);
if (IS_ERR(send_buf)) {
c_err("%s:Couldn't allocate send buf\n", __func__);
goto err_sndbuf;
}
send_buf->ah = ah;
/* Set up common MAD hdr */
trap_mad = send_buf->mad;
trap_mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
trap_mad->mad_hdr.mgmt_class = OPA_MGMT_CLASS_INTEL_EMA;
trap_mad->mad_hdr.class_version = OPA_EMA_CLASS_VERSION;
trap_mad->mad_hdr.method = IB_MGMT_METHOD_TRAP;
port->tid++;
trap_mad->mad_hdr.tid = cpu_to_be64(port->tid);
trap_mad->mad_hdr.attr_id = IB_SMP_ATTR_NOTICE;
/* Set up vendor OUI */
trap_mad->oui[0] = INTEL_OUI_1;
trap_mad->oui[1] = INTEL_OUI_2;
trap_mad->oui[2] = INTEL_OUI_3;
/* Setup notice attribute portion */
trap_mad->notice.gen_type = OPA_INTEL_EMA_NOTICE_TYPE_INFO << 1;
trap_mad->notice.oui_1 = INTEL_OUI_1;
trap_mad->notice.oui_2 = INTEL_OUI_2;
trap_mad->notice.oui_3 = INTEL_OUI_3;
trap_mad->notice.issuer_lid = cpu_to_be32(lid);
/* copy the actual trap data */
trap = (struct opa_veswport_trap *)trap_mad->notice.raw_data;
trap->fabric_id = cpu_to_be16(data->fabric_id);
trap->veswid = cpu_to_be16(data->veswid);
trap->veswportnum = cpu_to_be32(data->veswportnum);
trap->opaportnum = cpu_to_be16(data->opaportnum);
trap->veswportindex = data->veswportindex;
trap->opcode = data->opcode;
/* If successful send set up rate limit timeout else bail */
if (ib_post_send_mad(send_buf, NULL)) {
ib_free_send_mad(send_buf);
} else {
if (adapter->trap_count)
return;
adapter->trap_timeout = jiffies +
usecs_to_jiffies(OPA_VNIC_TRAP_TIMEOUT);
return;
}
err_sndbuf:
rdma_destroy_ah(ah);
err_exit:
v_err("Aborting trap\n");
}
static int vema_rem_vport(int id, void *p, void *data)
{
struct opa_vnic_adapter *adapter = p;
opa_vnic_rem_netdev(adapter);
return 0;
}
static int vema_enable_vport(int id, void *p, void *data)
{
struct opa_vnic_adapter *adapter = p;
netif_carrier_on(adapter->netdev);
return 0;
}
static int vema_disable_vport(int id, void *p, void *data)
{
struct opa_vnic_adapter *adapter = p;
netif_carrier_off(adapter->netdev);
return 0;
}
static void opa_vnic_event(struct ib_event_handler *handler,
struct ib_event *record)
{
struct opa_vnic_vema_port *port =
container_of(handler, struct opa_vnic_vema_port, event_handler);
struct opa_vnic_ctrl_port *cport = port->cport;
if (record->element.port_num != port->port_num)
return;
c_dbg("OPA_VNIC received event %d on device %s port %d\n",
record->event, record->device->name, record->element.port_num);
if (record->event == IB_EVENT_PORT_ERR)
idr_for_each(&port->vport_idr, vema_disable_vport, NULL);
if (record->event == IB_EVENT_PORT_ACTIVE)
idr_for_each(&port->vport_idr, vema_enable_vport, NULL);
}
/**
* vema_unregister -- Unregisters agent
* @cport: pointer to control port
*
* This deletes the registration by VEMA for MADs
*/
static void vema_unregister(struct opa_vnic_ctrl_port *cport)
{
int i;
for (i = 1; i <= cport->num_ports; i++) {
struct opa_vnic_vema_port *port = vema_get_port(cport, i);
if (!port->mad_agent)
continue;
/* Lock ensures no MAD is being processed */
mutex_lock(&port->lock);
idr_for_each(&port->vport_idr, vema_rem_vport, NULL);
mutex_unlock(&port->lock);
ib_unregister_mad_agent(port->mad_agent);
port->mad_agent = NULL;
mutex_destroy(&port->lock);
idr_destroy(&port->vport_idr);
ib_unregister_event_handler(&port->event_handler);
}
}
/**
* vema_register -- Registers agent
* @cport: pointer to control port
*
* This function registers the handlers for the VEMA MADs
*
* Return: returns 0 on success. non zero otherwise
*/
static int vema_register(struct opa_vnic_ctrl_port *cport)
{
struct ib_mad_reg_req reg_req = {
.mgmt_class = OPA_MGMT_CLASS_INTEL_EMA,
.mgmt_class_version = OPA_MGMT_BASE_VERSION,
.oui = { INTEL_OUI_1, INTEL_OUI_2, INTEL_OUI_3 }
};
int i;
set_bit(IB_MGMT_METHOD_GET, reg_req.method_mask);
set_bit(IB_MGMT_METHOD_SET, reg_req.method_mask);
/* register ib event handler and mad agent for each port on dev */
for (i = 1; i <= cport->num_ports; i++) {
struct opa_vnic_vema_port *port = vema_get_port(cport, i);
int ret;
port->cport = cport;
port->port_num = i;
INIT_IB_EVENT_HANDLER(&port->event_handler,
cport->ibdev, opa_vnic_event);
ib_register_event_handler(&port->event_handler);
idr_init(&port->vport_idr);
mutex_init(&port->lock);
port->mad_agent = ib_register_mad_agent(cport->ibdev, i,
IB_QPT_GSI, &reg_req,
IB_MGMT_RMPP_VERSION,
vema_send, vema_recv,
port, 0);
if (IS_ERR(port->mad_agent)) {
ret = PTR_ERR(port->mad_agent);
port->mad_agent = NULL;
mutex_destroy(&port->lock);
idr_destroy(&port->vport_idr);
vema_unregister(cport);
return ret;
}
}
return 0;
}
/**
* opa_vnic_ctrl_config_dev -- This function sends a trap to the EM
* by way of ib_modify_port to indicate support for ethernet on the
* fabric.
* @cport: pointer to control port
* @en: enable or disable ethernet on fabric support
*/
static void opa_vnic_ctrl_config_dev(struct opa_vnic_ctrl_port *cport, bool en)
{
struct ib_port_modify pm = { 0 };
int i;
if (en)
pm.set_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
else
pm.clr_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
for (i = 1; i <= cport->num_ports; i++)
ib_modify_port(cport->ibdev, i, IB_PORT_OPA_MASK_CHG, &pm);
}
/**
* opa_vnic_vema_add_one -- Handle new ib device
* @device: ib device pointer
*
* Allocate the vnic control port and initialize it.
*/
static void opa_vnic_vema_add_one(struct ib_device *device)
{
struct opa_vnic_ctrl_port *cport;
int rc, size = sizeof(*cport);
if (!rdma_cap_opa_vnic(device))
return;
size += device->phys_port_cnt * sizeof(struct opa_vnic_vema_port);
cport = kzalloc(size, GFP_KERNEL);
if (!cport)
return;
cport->num_ports = device->phys_port_cnt;
cport->ibdev = device;
/* Initialize opa vnic management agent (vema) */
rc = vema_register(cport);
if (!rc)
c_info("VNIC client initialized\n");
ib_set_client_data(device, &opa_vnic_client, cport);
opa_vnic_ctrl_config_dev(cport, true);
}
/**
* opa_vnic_vema_rem_one -- Handle ib device removal
* @device: ib device pointer
* @client_data: ib client data
*
* Uninitialize and free the vnic control port.
*/
static void opa_vnic_vema_rem_one(struct ib_device *device,
void *client_data)
{
struct opa_vnic_ctrl_port *cport = client_data;
if (!cport)
return;
c_info("removing VNIC client\n");
opa_vnic_ctrl_config_dev(cport, false);
vema_unregister(cport);
kfree(cport);
}
static int __init opa_vnic_init(void)
{
int rc;
pr_info("OPA Virtual Network Driver - v%s\n",
opa_vnic_driver_version);
rc = ib_register_client(&opa_vnic_client);
if (rc)
pr_err("VNIC driver register failed %d\n", rc);
return rc;
}
module_init(opa_vnic_init);
static void opa_vnic_deinit(void)
{
ib_unregister_client(&opa_vnic_client);
}
module_exit(opa_vnic_deinit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Intel OPA Virtual Network driver");
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