2 * Copyright(c) 2017 Intel Corporation.
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
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44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 * This file contains OPA Virtual Network Interface Controller (VNIC)
50 * Ethernet Management Agent (EMA) driver
53 #include <linux/module.h>
54 #include <linux/xarray.h>
55 #include <rdma/ib_addr.h>
56 #include <rdma/ib_verbs.h>
57 #include <rdma/opa_smi.h>
58 #include <rdma/opa_port_info.h>
60 #include "opa_vnic_internal.h"
62 char opa_vnic_driver_name[] = "opa_vnic";
65 * The trap service level is kept in bits 3 to 7 in the trap_sl_rsvd
66 * field in the class port info MAD.
68 #define GET_TRAP_SL_FROM_CLASS_PORT_INFO(x) (((x) >> 3) & 0x1f)
70 /* Cap trap bursts to a reasonable limit good for normal cases */
71 #define OPA_VNIC_TRAP_BURST_LIMIT 4
74 * VNIC trap limit timeout.
75 * Inverse of cap2_mask response time out (1.0737 secs) = 0.9
76 * secs approx IB spec 13.4.6.2.1 PortInfoSubnetTimeout and
79 #define OPA_VNIC_TRAP_TIMEOUT ((4096 * (1UL << 18)) / 1000)
81 #define OPA_VNIC_UNSUP_ATTR \
82 cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB)
84 #define OPA_VNIC_INVAL_ATTR \
85 cpu_to_be16(IB_MGMT_MAD_STATUS_INVALID_ATTRIB_VALUE)
87 #define OPA_VNIC_CLASS_CAP_TRAP 0x1
89 /* Maximum number of VNIC ports supported */
90 #define OPA_VNIC_MAX_NUM_VPORT 255
93 * struct opa_vnic_vema_port -- VNIC VEMA port details
94 * @cport: pointer to port
95 * @mad_agent: pointer to mad agent for port
96 * @class_port_info: Class port info information.
97 * @tid: Transaction id
98 * @port_num: OPA port number
100 * @event_handler: ib event handler
101 * @lock: adapter interface lock
103 struct opa_vnic_vema_port {
104 struct opa_vnic_ctrl_port *cport;
105 struct ib_mad_agent *mad_agent;
106 struct opa_class_port_info class_port_info;
109 struct xarray vports;
110 struct ib_event_handler event_handler;
112 /* Lock to query/update network adapter */
116 static int opa_vnic_vema_add_one(struct ib_device *device);
117 static void opa_vnic_vema_rem_one(struct ib_device *device,
120 static struct ib_client opa_vnic_client = {
121 .name = opa_vnic_driver_name,
122 .add = opa_vnic_vema_add_one,
123 .remove = opa_vnic_vema_rem_one,
127 * vema_get_vport_num -- Get the vnic from the mad
128 * @recvd_mad: Received mad
130 * Return: returns value of the vnic port number
132 static inline u8 vema_get_vport_num(struct opa_vnic_vema_mad *recvd_mad)
134 return be32_to_cpu(recvd_mad->mad_hdr.attr_mod) & 0xff;
138 * vema_get_vport_adapter -- Get vnic port adapter from recvd mad
139 * @recvd_mad: received mad
140 * @port: ptr to port struct on which MAD was recvd
142 * Return: vnic adapter
144 static inline struct opa_vnic_adapter *
145 vema_get_vport_adapter(struct opa_vnic_vema_mad *recvd_mad,
146 struct opa_vnic_vema_port *port)
148 u8 vport_num = vema_get_vport_num(recvd_mad);
150 return xa_load(&port->vports, vport_num);
154 * vema_mac_tbl_req_ok -- Check if mac request has correct values
155 * @mac_tbl: mac table
157 * This function checks for the validity of the offset and number of
160 * Return: true if offset and num_entries are valid
162 static inline bool vema_mac_tbl_req_ok(struct opa_veswport_mactable *mac_tbl)
164 u16 offset, num_entries;
165 u16 req_entries = ((OPA_VNIC_EMA_DATA - sizeof(*mac_tbl)) /
166 sizeof(mac_tbl->tbl_entries[0]));
168 offset = be16_to_cpu(mac_tbl->offset);
169 num_entries = be16_to_cpu(mac_tbl->num_entries);
171 return ((num_entries <= req_entries) &&
172 (offset + num_entries <= OPA_VNIC_MAC_TBL_MAX_ENTRIES));
176 * Return the power on default values in the port info structure
177 * in big endian format as required by MAD.
179 static inline void vema_get_pod_values(struct opa_veswport_info *port_info)
181 memset(port_info, 0, sizeof(*port_info));
182 port_info->vport.max_mac_tbl_ent =
183 cpu_to_be16(OPA_VNIC_MAC_TBL_MAX_ENTRIES);
184 port_info->vport.max_smac_ent =
185 cpu_to_be16(OPA_VNIC_MAX_SMAC_LIMIT);
186 port_info->vport.oper_state = OPA_VNIC_STATE_DROP_ALL;
187 port_info->vport.config_state = OPA_VNIC_STATE_DROP_ALL;
188 port_info->vesw.eth_mtu = cpu_to_be16(ETH_DATA_LEN);
192 * vema_add_vport -- Add a new vnic port
193 * @port: ptr to opa_vnic_vema_port struct
194 * @vport_num: vnic port number (to be added)
196 * Return a pointer to the vnic adapter structure
198 static struct opa_vnic_adapter *vema_add_vport(struct opa_vnic_vema_port *port,
201 struct opa_vnic_ctrl_port *cport = port->cport;
202 struct opa_vnic_adapter *adapter;
204 adapter = opa_vnic_add_netdev(cport->ibdev, port->port_num, vport_num);
205 if (!IS_ERR(adapter)) {
208 adapter->cport = cport;
209 rc = xa_insert(&port->vports, vport_num, adapter, GFP_KERNEL);
211 opa_vnic_rem_netdev(adapter);
212 adapter = ERR_PTR(rc);
220 * vema_get_class_port_info -- Get class info for port
221 * @port: Port on whic MAD was received
222 * @recvd_mad: pointer to the received mad
223 * @rsp_mad: pointer to respose mad
225 * This function copies the latest class port info value set for the
226 * port and stores it for generating traps
228 static void vema_get_class_port_info(struct opa_vnic_vema_port *port,
229 struct opa_vnic_vema_mad *recvd_mad,
230 struct opa_vnic_vema_mad *rsp_mad)
232 struct opa_class_port_info *port_info;
234 port_info = (struct opa_class_port_info *)rsp_mad->data;
235 memcpy(port_info, &port->class_port_info, sizeof(*port_info));
236 port_info->base_version = OPA_MGMT_BASE_VERSION,
237 port_info->class_version = OPA_EMA_CLASS_VERSION;
240 * Set capability mask bit indicating agent generates traps,
241 * and set the maximum number of VNIC ports supported.
243 port_info->cap_mask = cpu_to_be16((OPA_VNIC_CLASS_CAP_TRAP |
244 (OPA_VNIC_MAX_NUM_VPORT << 8)));
247 * Since a get routine is always sent by the EM first we
248 * set the expected response time to
249 * 4.096 usec * 2^18 == 1.0737 sec here.
251 port_info->cap_mask2_resp_time = cpu_to_be32(18);
255 * vema_set_class_port_info -- Get class info for port
256 * @port: Port on whic MAD was received
257 * @recvd_mad: pointer to the received mad
258 * @rsp_mad: pointer to respose mad
260 * This function updates the port class info for the specific vnic
261 * and sets up the response mad data
263 static void vema_set_class_port_info(struct opa_vnic_vema_port *port,
264 struct opa_vnic_vema_mad *recvd_mad,
265 struct opa_vnic_vema_mad *rsp_mad)
267 memcpy(&port->class_port_info, recvd_mad->data,
268 sizeof(port->class_port_info));
270 vema_get_class_port_info(port, recvd_mad, rsp_mad);
274 * vema_get_veswport_info -- Get veswport info
275 * @port: source port on which MAD was received
276 * @recvd_mad: pointer to the received mad
277 * @rsp_mad: pointer to respose mad
279 static void vema_get_veswport_info(struct opa_vnic_vema_port *port,
280 struct opa_vnic_vema_mad *recvd_mad,
281 struct opa_vnic_vema_mad *rsp_mad)
283 struct opa_veswport_info *port_info =
284 (struct opa_veswport_info *)rsp_mad->data;
285 struct opa_vnic_adapter *adapter;
287 adapter = vema_get_vport_adapter(recvd_mad, port);
289 memset(port_info, 0, sizeof(*port_info));
290 opa_vnic_get_vesw_info(adapter, &port_info->vesw);
291 opa_vnic_get_per_veswport_info(adapter,
294 vema_get_pod_values(port_info);
299 * vema_set_veswport_info -- Set veswport info
300 * @port: source port on which MAD was received
301 * @recvd_mad: pointer to the received mad
302 * @rsp_mad: pointer to respose mad
304 * This function gets the port class infor for vnic
306 static void vema_set_veswport_info(struct opa_vnic_vema_port *port,
307 struct opa_vnic_vema_mad *recvd_mad,
308 struct opa_vnic_vema_mad *rsp_mad)
310 struct opa_vnic_ctrl_port *cport = port->cport;
311 struct opa_veswport_info *port_info;
312 struct opa_vnic_adapter *adapter;
315 vport_num = vema_get_vport_num(recvd_mad);
317 adapter = vema_get_vport_adapter(recvd_mad, port);
319 adapter = vema_add_vport(port, vport_num);
320 if (IS_ERR(adapter)) {
321 c_err("failed to add vport %d: %ld\n",
322 vport_num, PTR_ERR(adapter));
327 port_info = (struct opa_veswport_info *)recvd_mad->data;
328 opa_vnic_set_vesw_info(adapter, &port_info->vesw);
329 opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
331 /* Process the new config settings */
332 opa_vnic_process_vema_config(adapter);
334 vema_get_veswport_info(port, recvd_mad, rsp_mad);
338 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
342 * vema_get_mac_entries -- Get MAC entries in VNIC MAC table
343 * @port: source port on which MAD was received
344 * @recvd_mad: pointer to the received mad
345 * @rsp_mad: pointer to respose mad
347 * This function gets the MAC entries that are programmed into
348 * the VNIC MAC forwarding table. It checks for the validity of
349 * the index into the MAC table and the number of entries that
350 * are to be retrieved.
352 static void vema_get_mac_entries(struct opa_vnic_vema_port *port,
353 struct opa_vnic_vema_mad *recvd_mad,
354 struct opa_vnic_vema_mad *rsp_mad)
356 struct opa_veswport_mactable *mac_tbl_in, *mac_tbl_out;
357 struct opa_vnic_adapter *adapter;
359 adapter = vema_get_vport_adapter(recvd_mad, port);
361 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
365 mac_tbl_in = (struct opa_veswport_mactable *)recvd_mad->data;
366 mac_tbl_out = (struct opa_veswport_mactable *)rsp_mad->data;
368 if (vema_mac_tbl_req_ok(mac_tbl_in)) {
369 mac_tbl_out->offset = mac_tbl_in->offset;
370 mac_tbl_out->num_entries = mac_tbl_in->num_entries;
371 opa_vnic_query_mac_tbl(adapter, mac_tbl_out);
373 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
378 * vema_set_mac_entries -- Set MAC entries in VNIC MAC table
379 * @port: source port on which MAD was received
380 * @recvd_mad: pointer to the received mad
381 * @rsp_mad: pointer to respose mad
383 * This function sets the MAC entries in the VNIC forwarding table
384 * It checks for the validity of the index and the number of forwarding
385 * table entries to be programmed.
387 static void vema_set_mac_entries(struct opa_vnic_vema_port *port,
388 struct opa_vnic_vema_mad *recvd_mad,
389 struct opa_vnic_vema_mad *rsp_mad)
391 struct opa_veswport_mactable *mac_tbl;
392 struct opa_vnic_adapter *adapter;
394 adapter = vema_get_vport_adapter(recvd_mad, port);
396 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
400 mac_tbl = (struct opa_veswport_mactable *)recvd_mad->data;
401 if (vema_mac_tbl_req_ok(mac_tbl)) {
402 if (opa_vnic_update_mac_tbl(adapter, mac_tbl))
403 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
405 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
407 vema_get_mac_entries(port, recvd_mad, rsp_mad);
411 * vema_set_delete_vesw -- Reset VESW info to POD values
412 * @port: source port on which MAD was received
413 * @recvd_mad: pointer to the received mad
414 * @rsp_mad: pointer to respose mad
416 * This function clears all the fields of veswport info for the requested vesw
417 * and sets them back to the power-on default values. It does not delete the
420 static void vema_set_delete_vesw(struct opa_vnic_vema_port *port,
421 struct opa_vnic_vema_mad *recvd_mad,
422 struct opa_vnic_vema_mad *rsp_mad)
424 struct opa_veswport_info *port_info =
425 (struct opa_veswport_info *)rsp_mad->data;
426 struct opa_vnic_adapter *adapter;
428 adapter = vema_get_vport_adapter(recvd_mad, port);
430 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
434 vema_get_pod_values(port_info);
435 opa_vnic_set_vesw_info(adapter, &port_info->vesw);
436 opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
438 /* Process the new config settings */
439 opa_vnic_process_vema_config(adapter);
441 opa_vnic_release_mac_tbl(adapter);
443 vema_get_veswport_info(port, recvd_mad, rsp_mad);
447 * vema_get_mac_list -- Get the unicast/multicast macs.
448 * @port: source port on which MAD was received
449 * @recvd_mad: Received mad contains fields to set vnic parameters
450 * @rsp_mad: Response mad to be built
451 * @attr_id: Attribute ID indicating multicast or unicast mac list
453 static void vema_get_mac_list(struct opa_vnic_vema_port *port,
454 struct opa_vnic_vema_mad *recvd_mad,
455 struct opa_vnic_vema_mad *rsp_mad,
458 struct opa_veswport_iface_macs *macs_in, *macs_out;
459 int max_entries = (OPA_VNIC_EMA_DATA - sizeof(*macs_out)) / ETH_ALEN;
460 struct opa_vnic_adapter *adapter;
462 adapter = vema_get_vport_adapter(recvd_mad, port);
464 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
468 macs_in = (struct opa_veswport_iface_macs *)recvd_mad->data;
469 macs_out = (struct opa_veswport_iface_macs *)rsp_mad->data;
471 macs_out->start_idx = macs_in->start_idx;
472 if (macs_in->num_macs_in_msg)
473 macs_out->num_macs_in_msg = macs_in->num_macs_in_msg;
475 macs_out->num_macs_in_msg = cpu_to_be16(max_entries);
477 if (attr_id == OPA_EM_ATTR_IFACE_MCAST_MACS)
478 opa_vnic_query_mcast_macs(adapter, macs_out);
480 opa_vnic_query_ucast_macs(adapter, macs_out);
484 * vema_get_summary_counters -- Gets summary counters.
485 * @port: source port on which MAD was received
486 * @recvd_mad: Received mad contains fields to set vnic parameters
487 * @rsp_mad: Response mad to be built
489 static void vema_get_summary_counters(struct opa_vnic_vema_port *port,
490 struct opa_vnic_vema_mad *recvd_mad,
491 struct opa_vnic_vema_mad *rsp_mad)
493 struct opa_veswport_summary_counters *cntrs;
494 struct opa_vnic_adapter *adapter;
496 adapter = vema_get_vport_adapter(recvd_mad, port);
498 cntrs = (struct opa_veswport_summary_counters *)rsp_mad->data;
499 opa_vnic_get_summary_counters(adapter, cntrs);
501 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
506 * vema_get_error_counters -- Gets summary counters.
507 * @port: source port on which MAD was received
508 * @recvd_mad: Received mad contains fields to set vnic parameters
509 * @rsp_mad: Response mad to be built
511 static void vema_get_error_counters(struct opa_vnic_vema_port *port,
512 struct opa_vnic_vema_mad *recvd_mad,
513 struct opa_vnic_vema_mad *rsp_mad)
515 struct opa_veswport_error_counters *cntrs;
516 struct opa_vnic_adapter *adapter;
518 adapter = vema_get_vport_adapter(recvd_mad, port);
520 cntrs = (struct opa_veswport_error_counters *)rsp_mad->data;
521 opa_vnic_get_error_counters(adapter, cntrs);
523 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
528 * vema_get -- Process received get MAD
529 * @port: source port on which MAD was received
530 * @recvd_mad: Received mad
531 * @rsp_mad: Response mad to be built
533 static void vema_get(struct opa_vnic_vema_port *port,
534 struct opa_vnic_vema_mad *recvd_mad,
535 struct opa_vnic_vema_mad *rsp_mad)
537 u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
540 case OPA_EM_ATTR_CLASS_PORT_INFO:
541 vema_get_class_port_info(port, recvd_mad, rsp_mad);
543 case OPA_EM_ATTR_VESWPORT_INFO:
544 vema_get_veswport_info(port, recvd_mad, rsp_mad);
546 case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
547 vema_get_mac_entries(port, recvd_mad, rsp_mad);
549 case OPA_EM_ATTR_IFACE_UCAST_MACS:
551 case OPA_EM_ATTR_IFACE_MCAST_MACS:
552 vema_get_mac_list(port, recvd_mad, rsp_mad, attr_id);
554 case OPA_EM_ATTR_VESWPORT_SUMMARY_COUNTERS:
555 vema_get_summary_counters(port, recvd_mad, rsp_mad);
557 case OPA_EM_ATTR_VESWPORT_ERROR_COUNTERS:
558 vema_get_error_counters(port, recvd_mad, rsp_mad);
561 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
567 * vema_set -- Process received set MAD
568 * @port: source port on which MAD was received
569 * @recvd_mad: Received mad contains fields to set vnic parameters
570 * @rsp_mad: Response mad to be built
572 static void vema_set(struct opa_vnic_vema_port *port,
573 struct opa_vnic_vema_mad *recvd_mad,
574 struct opa_vnic_vema_mad *rsp_mad)
576 u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
579 case OPA_EM_ATTR_CLASS_PORT_INFO:
580 vema_set_class_port_info(port, recvd_mad, rsp_mad);
582 case OPA_EM_ATTR_VESWPORT_INFO:
583 vema_set_veswport_info(port, recvd_mad, rsp_mad);
585 case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
586 vema_set_mac_entries(port, recvd_mad, rsp_mad);
588 case OPA_EM_ATTR_DELETE_VESW:
589 vema_set_delete_vesw(port, recvd_mad, rsp_mad);
592 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
598 * vema_send -- Send handler for VEMA MAD agent
599 * @mad_agent: pointer to the mad agent
600 * @mad_wc: pointer to mad send work completion information
602 * Free all the data structures associated with the sent MAD
604 static void vema_send(struct ib_mad_agent *mad_agent,
605 struct ib_mad_send_wc *mad_wc)
607 rdma_destroy_ah(mad_wc->send_buf->ah, RDMA_DESTROY_AH_SLEEPABLE);
608 ib_free_send_mad(mad_wc->send_buf);
612 * vema_recv -- Recv handler for VEMA MAD agent
613 * @mad_agent: pointer to the mad agent
614 * @send_buf: Send buffer if found, else NULL
615 * @mad_wc: pointer to mad send work completion information
617 * Handle only set and get methods and respond to other methods
618 * as unsupported. Allocate response buffer and address handle
619 * for the response MAD.
621 static void vema_recv(struct ib_mad_agent *mad_agent,
622 struct ib_mad_send_buf *send_buf,
623 struct ib_mad_recv_wc *mad_wc)
625 struct opa_vnic_vema_port *port;
627 struct ib_mad_send_buf *rsp;
628 struct opa_vnic_vema_mad *vema_mad;
630 if (!mad_wc || !mad_wc->recv_buf.mad)
633 port = mad_agent->context;
634 ah = ib_create_ah_from_wc(mad_agent->qp->pd, mad_wc->wc,
635 mad_wc->recv_buf.grh, mad_agent->port_num);
639 rsp = ib_create_send_mad(mad_agent, mad_wc->wc->src_qp,
640 mad_wc->wc->pkey_index, 0,
641 IB_MGMT_VENDOR_HDR, OPA_VNIC_EMA_DATA,
642 GFP_KERNEL, OPA_MGMT_BASE_VERSION);
648 memcpy(vema_mad, mad_wc->recv_buf.mad, IB_MGMT_VENDOR_HDR);
649 vema_mad->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
650 vema_mad->mad_hdr.status = 0;
652 /* Lock ensures network adapter is not removed */
653 mutex_lock(&port->lock);
655 switch (mad_wc->recv_buf.mad->mad_hdr.method) {
656 case IB_MGMT_METHOD_GET:
657 vema_get(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
660 case IB_MGMT_METHOD_SET:
661 vema_set(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
665 vema_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
668 mutex_unlock(&port->lock);
670 if (!ib_post_send_mad(rsp, NULL)) {
672 * with post send successful ah and send mad
673 * will be destroyed in send handler
678 ib_free_send_mad(rsp);
681 rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
683 ib_free_recv_mad(mad_wc);
687 * vema_get_port -- Gets the opa_vnic_vema_port
688 * @cport: pointer to control dev
689 * @port_num: Port number
691 * This function loops through the ports and returns
692 * the opa_vnic_vema port structure that is associated
693 * with the OPA port number
695 * Return: ptr to requested opa_vnic_vema_port strucure
696 * if success, NULL if not
698 static struct opa_vnic_vema_port *
699 vema_get_port(struct opa_vnic_ctrl_port *cport, u8 port_num)
701 struct opa_vnic_vema_port *port = (void *)cport + sizeof(*cport);
703 if (port_num > cport->num_ports)
706 return port + (port_num - 1);
710 * opa_vnic_vema_send_trap -- This function sends a trap to the EM
711 * @adapter: pointer to vnic adapter
712 * @data: pointer to trap data filled by calling function
713 * @lid: issuers lid (encap_slid from vesw_port_info)
715 * This function is called from the VNIC driver to send a trap if there
716 * is somethng the EM should be notified about. These events currently
718 * 1) UNICAST INTERFACE MACADDRESS changes
719 * 2) MULTICAST INTERFACE MACADDRESS changes
720 * 3) ETHERNET LINK STATUS changes
721 * While allocating the send mad the remote site qpn used is 1
722 * as this is the well known QP.
725 void opa_vnic_vema_send_trap(struct opa_vnic_adapter *adapter,
726 struct __opa_veswport_trap *data, u32 lid)
728 struct opa_vnic_ctrl_port *cport = adapter->cport;
729 struct ib_mad_send_buf *send_buf;
730 struct opa_vnic_vema_port *port;
731 struct ib_device *ibp;
732 struct opa_vnic_vema_mad_trap *trap_mad;
733 struct opa_class_port_info *class;
734 struct rdma_ah_attr ah_attr;
736 struct opa_veswport_trap *trap;
743 port = vema_get_port(cport, data->opaportnum);
744 if (!port || !port->mad_agent)
747 if (time_before(jiffies, adapter->trap_timeout)) {
748 if (adapter->trap_count == OPA_VNIC_TRAP_BURST_LIMIT) {
749 v_warn("Trap rate exceeded\n");
752 adapter->trap_count++;
755 adapter->trap_count = 0;
758 class = &port->class_port_info;
759 /* Set up address handle */
760 memset(&ah_attr, 0, sizeof(ah_attr));
761 ah_attr.type = rdma_ah_find_type(ibp, port->port_num);
762 rdma_ah_set_sl(&ah_attr,
763 GET_TRAP_SL_FROM_CLASS_PORT_INFO(class->trap_sl_rsvd));
764 rdma_ah_set_port_num(&ah_attr, port->port_num);
765 trap_lid = be32_to_cpu(class->trap_lid);
767 * check for trap lid validity, must not be zero
768 * The trap sink could change after we fashion the MAD but since traps
769 * are not guaranteed we won't use a lock as anyway the change will take
770 * place even with locking.
773 c_err("%s: Invalid dlid\n", __func__);
777 rdma_ah_set_dlid(&ah_attr, trap_lid);
778 ah = rdma_create_ah(port->mad_agent->qp->pd, &ah_attr, 0);
780 c_err("%s:Couldn't create new AH = %p\n", __func__, ah);
781 c_err("%s:dlid = %d, sl = %d, port = %d\n", __func__,
782 rdma_ah_get_dlid(&ah_attr), rdma_ah_get_sl(&ah_attr),
783 rdma_ah_get_port_num(&ah_attr));
787 if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_FULL,
789 c_err("%s:full key not found, defaulting to partial\n",
791 if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_PARTIAL,
796 send_buf = ib_create_send_mad(port->mad_agent, 1, pkey_idx, 0,
797 IB_MGMT_VENDOR_HDR, IB_MGMT_MAD_DATA,
798 GFP_ATOMIC, OPA_MGMT_BASE_VERSION);
799 if (IS_ERR(send_buf)) {
800 c_err("%s:Couldn't allocate send buf\n", __func__);
806 /* Set up common MAD hdr */
807 trap_mad = send_buf->mad;
808 trap_mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
809 trap_mad->mad_hdr.mgmt_class = OPA_MGMT_CLASS_INTEL_EMA;
810 trap_mad->mad_hdr.class_version = OPA_EMA_CLASS_VERSION;
811 trap_mad->mad_hdr.method = IB_MGMT_METHOD_TRAP;
813 trap_mad->mad_hdr.tid = cpu_to_be64(port->tid);
814 trap_mad->mad_hdr.attr_id = IB_SMP_ATTR_NOTICE;
816 /* Set up vendor OUI */
817 trap_mad->oui[0] = INTEL_OUI_1;
818 trap_mad->oui[1] = INTEL_OUI_2;
819 trap_mad->oui[2] = INTEL_OUI_3;
821 /* Setup notice attribute portion */
822 trap_mad->notice.gen_type = OPA_INTEL_EMA_NOTICE_TYPE_INFO << 1;
823 trap_mad->notice.oui_1 = INTEL_OUI_1;
824 trap_mad->notice.oui_2 = INTEL_OUI_2;
825 trap_mad->notice.oui_3 = INTEL_OUI_3;
826 trap_mad->notice.issuer_lid = cpu_to_be32(lid);
828 /* copy the actual trap data */
829 trap = (struct opa_veswport_trap *)trap_mad->notice.raw_data;
830 trap->fabric_id = cpu_to_be16(data->fabric_id);
831 trap->veswid = cpu_to_be16(data->veswid);
832 trap->veswportnum = cpu_to_be32(data->veswportnum);
833 trap->opaportnum = cpu_to_be16(data->opaportnum);
834 trap->veswportindex = data->veswportindex;
835 trap->opcode = data->opcode;
837 /* If successful send set up rate limit timeout else bail */
838 if (ib_post_send_mad(send_buf, NULL)) {
839 ib_free_send_mad(send_buf);
841 if (adapter->trap_count)
843 adapter->trap_timeout = jiffies +
844 usecs_to_jiffies(OPA_VNIC_TRAP_TIMEOUT);
849 rdma_destroy_ah(ah, 0);
851 v_err("Aborting trap\n");
854 static void opa_vnic_event(struct ib_event_handler *handler,
855 struct ib_event *record)
857 struct opa_vnic_vema_port *port =
858 container_of(handler, struct opa_vnic_vema_port, event_handler);
859 struct opa_vnic_ctrl_port *cport = port->cport;
860 struct opa_vnic_adapter *adapter;
863 if (record->element.port_num != port->port_num)
866 c_dbg("OPA_VNIC received event %d on device %s port %d\n",
867 record->event, dev_name(&record->device->dev),
868 record->element.port_num);
870 if (record->event != IB_EVENT_PORT_ERR &&
871 record->event != IB_EVENT_PORT_ACTIVE)
874 xa_for_each(&port->vports, index, adapter) {
875 if (record->event == IB_EVENT_PORT_ACTIVE)
876 netif_carrier_on(adapter->netdev);
878 netif_carrier_off(adapter->netdev);
883 * vema_unregister -- Unregisters agent
884 * @cport: pointer to control port
886 * This deletes the registration by VEMA for MADs
888 static void vema_unregister(struct opa_vnic_ctrl_port *cport)
890 struct opa_vnic_adapter *adapter;
894 for (i = 1; i <= cport->num_ports; i++) {
895 struct opa_vnic_vema_port *port = vema_get_port(cport, i);
897 if (!port->mad_agent)
900 /* Lock ensures no MAD is being processed */
901 mutex_lock(&port->lock);
902 xa_for_each(&port->vports, index, adapter)
903 opa_vnic_rem_netdev(adapter);
904 mutex_unlock(&port->lock);
906 ib_unregister_mad_agent(port->mad_agent);
907 port->mad_agent = NULL;
908 mutex_destroy(&port->lock);
909 xa_destroy(&port->vports);
910 ib_unregister_event_handler(&port->event_handler);
915 * vema_register -- Registers agent
916 * @cport: pointer to control port
918 * This function registers the handlers for the VEMA MADs
920 * Return: returns 0 on success. non zero otherwise
922 static int vema_register(struct opa_vnic_ctrl_port *cport)
924 struct ib_mad_reg_req reg_req = {
925 .mgmt_class = OPA_MGMT_CLASS_INTEL_EMA,
926 .mgmt_class_version = OPA_MGMT_BASE_VERSION,
927 .oui = { INTEL_OUI_1, INTEL_OUI_2, INTEL_OUI_3 }
931 set_bit(IB_MGMT_METHOD_GET, reg_req.method_mask);
932 set_bit(IB_MGMT_METHOD_SET, reg_req.method_mask);
934 /* register ib event handler and mad agent for each port on dev */
935 for (i = 1; i <= cport->num_ports; i++) {
936 struct opa_vnic_vema_port *port = vema_get_port(cport, i);
942 INIT_IB_EVENT_HANDLER(&port->event_handler,
943 cport->ibdev, opa_vnic_event);
944 ib_register_event_handler(&port->event_handler);
946 xa_init(&port->vports);
947 mutex_init(&port->lock);
948 port->mad_agent = ib_register_mad_agent(cport->ibdev, i,
949 IB_QPT_GSI, ®_req,
950 IB_MGMT_RMPP_VERSION,
951 vema_send, vema_recv,
953 if (IS_ERR(port->mad_agent)) {
954 ret = PTR_ERR(port->mad_agent);
955 port->mad_agent = NULL;
956 mutex_destroy(&port->lock);
957 vema_unregister(cport);
966 * opa_vnic_ctrl_config_dev -- This function sends a trap to the EM
967 * by way of ib_modify_port to indicate support for ethernet on the
969 * @cport: pointer to control port
970 * @en: enable or disable ethernet on fabric support
972 static void opa_vnic_ctrl_config_dev(struct opa_vnic_ctrl_port *cport, bool en)
974 struct ib_port_modify pm = { 0 };
978 pm.set_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
980 pm.clr_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
982 for (i = 1; i <= cport->num_ports; i++)
983 ib_modify_port(cport->ibdev, i, IB_PORT_OPA_MASK_CHG, &pm);
987 * opa_vnic_vema_add_one -- Handle new ib device
988 * @device: ib device pointer
990 * Allocate the vnic control port and initialize it.
992 static int opa_vnic_vema_add_one(struct ib_device *device)
994 struct opa_vnic_ctrl_port *cport;
995 int rc, size = sizeof(*cport);
997 if (!rdma_cap_opa_vnic(device))
1000 size += device->phys_port_cnt * sizeof(struct opa_vnic_vema_port);
1001 cport = kzalloc(size, GFP_KERNEL);
1005 cport->num_ports = device->phys_port_cnt;
1006 cport->ibdev = device;
1008 /* Initialize opa vnic management agent (vema) */
1009 rc = vema_register(cport);
1011 c_info("VNIC client initialized\n");
1013 ib_set_client_data(device, &opa_vnic_client, cport);
1014 opa_vnic_ctrl_config_dev(cport, true);
1019 * opa_vnic_vema_rem_one -- Handle ib device removal
1020 * @device: ib device pointer
1021 * @client_data: ib client data
1023 * Uninitialize and free the vnic control port.
1025 static void opa_vnic_vema_rem_one(struct ib_device *device,
1028 struct opa_vnic_ctrl_port *cport = client_data;
1030 c_info("removing VNIC client\n");
1031 opa_vnic_ctrl_config_dev(cport, false);
1032 vema_unregister(cport);
1036 static int __init opa_vnic_init(void)
1040 rc = ib_register_client(&opa_vnic_client);
1042 pr_err("VNIC driver register failed %d\n", rc);
1046 module_init(opa_vnic_init);
1048 static void opa_vnic_deinit(void)
1050 ib_unregister_client(&opa_vnic_client);
1052 module_exit(opa_vnic_deinit);
1054 MODULE_LICENSE("Dual BSD/GPL");
1055 MODULE_AUTHOR("Intel Corporation");
1056 MODULE_DESCRIPTION("Intel OPA Virtual Network driver");