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
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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 <rdma/ib_addr.h>
55 #include <rdma/ib_verbs.h>
56 #include <rdma/opa_smi.h>
57 #include <rdma/opa_port_info.h>
59 #include "opa_vnic_internal.h"
61 #define DRV_VERSION "1.0"
62 char opa_vnic_driver_name[] = "opa_vnic";
63 const char opa_vnic_driver_version[] = DRV_VERSION;
66 * The trap service level is kept in bits 3 to 7 in the trap_sl_rsvd
67 * field in the class port info MAD.
69 #define GET_TRAP_SL_FROM_CLASS_PORT_INFO(x) (((x) >> 3) & 0x1f)
71 /* Cap trap bursts to a reasonable limit good for normal cases */
72 #define OPA_VNIC_TRAP_BURST_LIMIT 4
75 * VNIC trap limit timeout.
76 * Inverse of cap2_mask response time out (1.0737 secs) = 0.9
77 * secs approx IB spec 13.4.6.2.1 PortInfoSubnetTimeout and
80 #define OPA_VNIC_TRAP_TIMEOUT ((4096 * (1UL << 18)) / 1000)
82 #define OPA_VNIC_UNSUP_ATTR \
83 cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB)
85 #define OPA_VNIC_INVAL_ATTR \
86 cpu_to_be16(IB_MGMT_MAD_STATUS_INVALID_ATTRIB_VALUE)
88 #define OPA_VNIC_CLASS_CAP_TRAP 0x1
90 /* Maximum number of VNIC ports supported */
91 #define OPA_VNIC_MAX_NUM_VPORT 255
94 * struct opa_vnic_vema_port -- VNIC VEMA port details
95 * @cport: pointer to port
96 * @mad_agent: pointer to mad agent for port
97 * @class_port_info: Class port info information.
98 * @tid: Transaction id
99 * @port_num: OPA port number
100 * @vport_idr: vnic ports idr
101 * @event_handler: ib event handler
102 * @lock: adapter interface lock
104 struct opa_vnic_vema_port {
105 struct opa_vnic_ctrl_port *cport;
106 struct ib_mad_agent *mad_agent;
107 struct opa_class_port_info class_port_info;
110 struct idr vport_idr;
111 struct ib_event_handler event_handler;
113 /* Lock to query/update network adapter */
117 static void opa_vnic_vema_add_one(struct ib_device *device);
118 static void opa_vnic_vema_rem_one(struct ib_device *device,
121 static struct ib_client opa_vnic_client = {
122 .name = opa_vnic_driver_name,
123 .add = opa_vnic_vema_add_one,
124 .remove = opa_vnic_vema_rem_one,
128 * vema_get_vport_num -- Get the vnic from the mad
129 * @recvd_mad: Received mad
131 * Return: returns value of the vnic port number
133 static inline u8 vema_get_vport_num(struct opa_vnic_vema_mad *recvd_mad)
135 return be32_to_cpu(recvd_mad->mad_hdr.attr_mod) & 0xff;
139 * vema_get_vport_adapter -- Get vnic port adapter from recvd mad
140 * @recvd_mad: received mad
141 * @port: ptr to port struct on which MAD was recvd
143 * Return: vnic adapter
145 static inline struct opa_vnic_adapter *
146 vema_get_vport_adapter(struct opa_vnic_vema_mad *recvd_mad,
147 struct opa_vnic_vema_port *port)
149 u8 vport_num = vema_get_vport_num(recvd_mad);
151 return idr_find(&port->vport_idr, vport_num);
155 * vema_mac_tbl_req_ok -- Check if mac request has correct values
156 * @mac_tbl: mac table
158 * This function checks for the validity of the offset and number of
161 * Return: true if offset and num_entries are valid
163 static inline bool vema_mac_tbl_req_ok(struct opa_veswport_mactable *mac_tbl)
165 u16 offset, num_entries;
166 u16 req_entries = ((OPA_VNIC_EMA_DATA - sizeof(*mac_tbl)) /
167 sizeof(mac_tbl->tbl_entries[0]));
169 offset = be16_to_cpu(mac_tbl->offset);
170 num_entries = be16_to_cpu(mac_tbl->num_entries);
172 return ((num_entries <= req_entries) &&
173 (offset + num_entries <= OPA_VNIC_MAC_TBL_MAX_ENTRIES));
177 * Return the power on default values in the port info structure
178 * in big endian format as required by MAD.
180 static inline void vema_get_pod_values(struct opa_veswport_info *port_info)
182 memset(port_info, 0, sizeof(*port_info));
183 port_info->vport.max_mac_tbl_ent =
184 cpu_to_be16(OPA_VNIC_MAC_TBL_MAX_ENTRIES);
185 port_info->vport.max_smac_ent =
186 cpu_to_be16(OPA_VNIC_MAX_SMAC_LIMIT);
187 port_info->vport.oper_state = OPA_VNIC_STATE_DROP_ALL;
188 port_info->vport.config_state = OPA_VNIC_STATE_DROP_ALL;
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 = idr_alloc(&port->vport_idr, adapter, vport_num,
210 vport_num + 1, GFP_NOWAIT);
212 opa_vnic_rem_netdev(adapter);
213 adapter = ERR_PTR(rc);
221 * vema_get_class_port_info -- Get class info for port
222 * @port: Port on whic MAD was received
223 * @recvd_mad: pointer to the received mad
224 * @rsp_mad: pointer to respose mad
226 * This function copies the latest class port info value set for the
227 * port and stores it for generating traps
229 static void vema_get_class_port_info(struct opa_vnic_vema_port *port,
230 struct opa_vnic_vema_mad *recvd_mad,
231 struct opa_vnic_vema_mad *rsp_mad)
233 struct opa_class_port_info *port_info;
235 port_info = (struct opa_class_port_info *)rsp_mad->data;
236 memcpy(port_info, &port->class_port_info, sizeof(*port_info));
237 port_info->base_version = OPA_MGMT_BASE_VERSION,
238 port_info->class_version = OPA_EMA_CLASS_VERSION;
241 * Set capability mask bit indicating agent generates traps,
242 * and set the maximum number of VNIC ports supported.
244 port_info->cap_mask = cpu_to_be16((OPA_VNIC_CLASS_CAP_TRAP |
245 (OPA_VNIC_MAX_NUM_VPORT << 8)));
248 * Since a get routine is always sent by the EM first we
249 * set the expected response time to
250 * 4.096 usec * 2^18 == 1.0737 sec here.
252 port_info->cap_mask2_resp_time = cpu_to_be32(18);
256 * vema_set_class_port_info -- Get class info for port
257 * @port: Port on whic MAD was received
258 * @recvd_mad: pointer to the received mad
259 * @rsp_mad: pointer to respose mad
261 * This function updates the port class info for the specific vnic
262 * and sets up the response mad data
264 static void vema_set_class_port_info(struct opa_vnic_vema_port *port,
265 struct opa_vnic_vema_mad *recvd_mad,
266 struct opa_vnic_vema_mad *rsp_mad)
268 memcpy(&port->class_port_info, recvd_mad->data,
269 sizeof(port->class_port_info));
271 vema_get_class_port_info(port, recvd_mad, rsp_mad);
275 * vema_get_veswport_info -- Get veswport info
276 * @port: source port on which MAD was received
277 * @recvd_mad: pointer to the received mad
278 * @rsp_mad: pointer to respose mad
280 static void vema_get_veswport_info(struct opa_vnic_vema_port *port,
281 struct opa_vnic_vema_mad *recvd_mad,
282 struct opa_vnic_vema_mad *rsp_mad)
284 struct opa_veswport_info *port_info =
285 (struct opa_veswport_info *)rsp_mad->data;
286 struct opa_vnic_adapter *adapter;
288 adapter = vema_get_vport_adapter(recvd_mad, port);
290 memset(port_info, 0, sizeof(*port_info));
291 opa_vnic_get_vesw_info(adapter, &port_info->vesw);
292 opa_vnic_get_per_veswport_info(adapter,
295 vema_get_pod_values(port_info);
300 * vema_set_veswport_info -- Set veswport info
301 * @port: source port on which MAD was received
302 * @recvd_mad: pointer to the received mad
303 * @rsp_mad: pointer to respose mad
305 * This function gets the port class infor for vnic
307 static void vema_set_veswport_info(struct opa_vnic_vema_port *port,
308 struct opa_vnic_vema_mad *recvd_mad,
309 struct opa_vnic_vema_mad *rsp_mad)
311 struct opa_vnic_ctrl_port *cport = port->cport;
312 struct opa_veswport_info *port_info;
313 struct opa_vnic_adapter *adapter;
316 vport_num = vema_get_vport_num(recvd_mad);
318 adapter = vema_get_vport_adapter(recvd_mad, port);
320 adapter = vema_add_vport(port, vport_num);
321 if (IS_ERR(adapter)) {
322 c_err("failed to add vport %d: %ld\n",
323 vport_num, PTR_ERR(adapter));
328 port_info = (struct opa_veswport_info *)recvd_mad->data;
329 opa_vnic_set_vesw_info(adapter, &port_info->vesw);
330 opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
332 /* Process the new config settings */
333 opa_vnic_process_vema_config(adapter);
335 vema_get_veswport_info(port, recvd_mad, rsp_mad);
339 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
343 * vema_get_mac_entries -- Get MAC entries in VNIC MAC table
344 * @port: source port on which MAD was received
345 * @recvd_mad: pointer to the received mad
346 * @rsp_mad: pointer to respose mad
348 * This function gets the MAC entries that are programmed into
349 * the VNIC MAC forwarding table. It checks for the validity of
350 * the index into the MAC table and the number of entries that
351 * are to be retrieved.
353 static void vema_get_mac_entries(struct opa_vnic_vema_port *port,
354 struct opa_vnic_vema_mad *recvd_mad,
355 struct opa_vnic_vema_mad *rsp_mad)
357 struct opa_veswport_mactable *mac_tbl_in, *mac_tbl_out;
358 struct opa_vnic_adapter *adapter;
360 adapter = vema_get_vport_adapter(recvd_mad, port);
362 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
366 mac_tbl_in = (struct opa_veswport_mactable *)recvd_mad->data;
367 mac_tbl_out = (struct opa_veswport_mactable *)rsp_mad->data;
369 if (vema_mac_tbl_req_ok(mac_tbl_in)) {
370 mac_tbl_out->offset = mac_tbl_in->offset;
371 mac_tbl_out->num_entries = mac_tbl_in->num_entries;
372 opa_vnic_query_mac_tbl(adapter, mac_tbl_out);
374 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
379 * vema_set_mac_entries -- Set MAC entries in VNIC MAC table
380 * @port: source port on which MAD was received
381 * @recvd_mad: pointer to the received mad
382 * @rsp_mad: pointer to respose mad
384 * This function sets the MAC entries in the VNIC forwarding table
385 * It checks for the validity of the index and the number of forwarding
386 * table entries to be programmed.
388 static void vema_set_mac_entries(struct opa_vnic_vema_port *port,
389 struct opa_vnic_vema_mad *recvd_mad,
390 struct opa_vnic_vema_mad *rsp_mad)
392 struct opa_veswport_mactable *mac_tbl;
393 struct opa_vnic_adapter *adapter;
395 adapter = vema_get_vport_adapter(recvd_mad, port);
397 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
401 mac_tbl = (struct opa_veswport_mactable *)recvd_mad->data;
402 if (vema_mac_tbl_req_ok(mac_tbl)) {
403 if (opa_vnic_update_mac_tbl(adapter, mac_tbl))
404 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
406 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
408 vema_get_mac_entries(port, recvd_mad, rsp_mad);
412 * vema_set_delete_vesw -- Reset VESW info to POD values
413 * @port: source port on which MAD was received
414 * @recvd_mad: pointer to the received mad
415 * @rsp_mad: pointer to respose mad
417 * This function clears all the fields of veswport info for the requested vesw
418 * and sets them back to the power-on default values. It does not delete the
421 static void vema_set_delete_vesw(struct opa_vnic_vema_port *port,
422 struct opa_vnic_vema_mad *recvd_mad,
423 struct opa_vnic_vema_mad *rsp_mad)
425 struct opa_veswport_info *port_info =
426 (struct opa_veswport_info *)rsp_mad->data;
427 struct opa_vnic_adapter *adapter;
429 adapter = vema_get_vport_adapter(recvd_mad, port);
431 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
435 vema_get_pod_values(port_info);
436 opa_vnic_set_vesw_info(adapter, &port_info->vesw);
437 opa_vnic_set_per_veswport_info(adapter, &port_info->vport);
439 /* Process the new config settings */
440 opa_vnic_process_vema_config(adapter);
442 opa_vnic_release_mac_tbl(adapter);
444 vema_get_veswport_info(port, recvd_mad, rsp_mad);
448 * vema_get_mac_list -- Get the unicast/multicast macs.
449 * @port: source port on which MAD was received
450 * @recvd_mad: Received mad contains fields to set vnic parameters
451 * @rsp_mad: Response mad to be built
452 * @attr_id: Attribute ID indicating multicast or unicast mac list
454 static void vema_get_mac_list(struct opa_vnic_vema_port *port,
455 struct opa_vnic_vema_mad *recvd_mad,
456 struct opa_vnic_vema_mad *rsp_mad,
459 struct opa_veswport_iface_macs *macs_in, *macs_out;
460 int max_entries = (OPA_VNIC_EMA_DATA - sizeof(*macs_out)) / ETH_ALEN;
461 struct opa_vnic_adapter *adapter;
463 adapter = vema_get_vport_adapter(recvd_mad, port);
465 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
469 macs_in = (struct opa_veswport_iface_macs *)recvd_mad->data;
470 macs_out = (struct opa_veswport_iface_macs *)rsp_mad->data;
472 macs_out->start_idx = macs_in->start_idx;
473 if (macs_in->num_macs_in_msg)
474 macs_out->num_macs_in_msg = macs_in->num_macs_in_msg;
476 macs_out->num_macs_in_msg = cpu_to_be16(max_entries);
478 if (attr_id == OPA_EM_ATTR_IFACE_MCAST_MACS)
479 opa_vnic_query_mcast_macs(adapter, macs_out);
481 opa_vnic_query_ucast_macs(adapter, macs_out);
485 * vema_get_summary_counters -- Gets summary counters.
486 * @port: source port on which MAD was received
487 * @recvd_mad: Received mad contains fields to set vnic parameters
488 * @rsp_mad: Response mad to be built
490 static void vema_get_summary_counters(struct opa_vnic_vema_port *port,
491 struct opa_vnic_vema_mad *recvd_mad,
492 struct opa_vnic_vema_mad *rsp_mad)
494 struct opa_veswport_summary_counters *cntrs;
495 struct opa_vnic_adapter *adapter;
497 adapter = vema_get_vport_adapter(recvd_mad, port);
499 cntrs = (struct opa_veswport_summary_counters *)rsp_mad->data;
500 opa_vnic_get_summary_counters(adapter, cntrs);
502 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
507 * vema_get_error_counters -- Gets summary counters.
508 * @port: source port on which MAD was received
509 * @recvd_mad: Received mad contains fields to set vnic parameters
510 * @rsp_mad: Response mad to be built
512 static void vema_get_error_counters(struct opa_vnic_vema_port *port,
513 struct opa_vnic_vema_mad *recvd_mad,
514 struct opa_vnic_vema_mad *rsp_mad)
516 struct opa_veswport_error_counters *cntrs;
517 struct opa_vnic_adapter *adapter;
519 adapter = vema_get_vport_adapter(recvd_mad, port);
521 cntrs = (struct opa_veswport_error_counters *)rsp_mad->data;
522 opa_vnic_get_error_counters(adapter, cntrs);
524 rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR;
529 * vema_get -- Process received get MAD
530 * @port: source port on which MAD was received
531 * @recvd_mad: Received mad
532 * @rsp_mad: Response mad to be built
534 static void vema_get(struct opa_vnic_vema_port *port,
535 struct opa_vnic_vema_mad *recvd_mad,
536 struct opa_vnic_vema_mad *rsp_mad)
538 u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
541 case OPA_EM_ATTR_CLASS_PORT_INFO:
542 vema_get_class_port_info(port, recvd_mad, rsp_mad);
544 case OPA_EM_ATTR_VESWPORT_INFO:
545 vema_get_veswport_info(port, recvd_mad, rsp_mad);
547 case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
548 vema_get_mac_entries(port, recvd_mad, rsp_mad);
550 case OPA_EM_ATTR_IFACE_UCAST_MACS:
552 case OPA_EM_ATTR_IFACE_MCAST_MACS:
553 vema_get_mac_list(port, recvd_mad, rsp_mad, attr_id);
555 case OPA_EM_ATTR_VESWPORT_SUMMARY_COUNTERS:
556 vema_get_summary_counters(port, recvd_mad, rsp_mad);
558 case OPA_EM_ATTR_VESWPORT_ERROR_COUNTERS:
559 vema_get_error_counters(port, recvd_mad, rsp_mad);
562 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
568 * vema_set -- Process received set MAD
569 * @port: source port on which MAD was received
570 * @recvd_mad: Received mad contains fields to set vnic parameters
571 * @rsp_mad: Response mad to be built
573 static void vema_set(struct opa_vnic_vema_port *port,
574 struct opa_vnic_vema_mad *recvd_mad,
575 struct opa_vnic_vema_mad *rsp_mad)
577 u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id);
580 case OPA_EM_ATTR_CLASS_PORT_INFO:
581 vema_set_class_port_info(port, recvd_mad, rsp_mad);
583 case OPA_EM_ATTR_VESWPORT_INFO:
584 vema_set_veswport_info(port, recvd_mad, rsp_mad);
586 case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES:
587 vema_set_mac_entries(port, recvd_mad, rsp_mad);
589 case OPA_EM_ATTR_DELETE_VESW:
590 vema_set_delete_vesw(port, recvd_mad, rsp_mad);
593 rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
599 * vema_send -- Send handler for VEMA MAD agent
600 * @mad_agent: pointer to the mad agent
601 * @mad_wc: pointer to mad send work completion information
603 * Free all the data structures associated with the sent MAD
605 static void vema_send(struct ib_mad_agent *mad_agent,
606 struct ib_mad_send_wc *mad_wc)
608 rdma_destroy_ah(mad_wc->send_buf->ah);
609 ib_free_send_mad(mad_wc->send_buf);
613 * vema_recv -- Recv handler for VEMA MAD agent
614 * @mad_agent: pointer to the mad agent
615 * @send_buf: Send buffer if found, else NULL
616 * @mad_wc: pointer to mad send work completion information
618 * Handle only set and get methods and respond to other methods
619 * as unsupported. Allocate response buffer and address handle
620 * for the response MAD.
622 static void vema_recv(struct ib_mad_agent *mad_agent,
623 struct ib_mad_send_buf *send_buf,
624 struct ib_mad_recv_wc *mad_wc)
626 struct opa_vnic_vema_port *port;
628 struct ib_mad_send_buf *rsp;
629 struct opa_vnic_vema_mad *vema_mad;
631 if (!mad_wc || !mad_wc->recv_buf.mad)
634 port = mad_agent->context;
635 ah = ib_create_ah_from_wc(mad_agent->qp->pd, mad_wc->wc,
636 mad_wc->recv_buf.grh, mad_agent->port_num);
640 rsp = ib_create_send_mad(mad_agent, mad_wc->wc->src_qp,
641 mad_wc->wc->pkey_index, 0,
642 IB_MGMT_VENDOR_HDR, OPA_VNIC_EMA_DATA,
643 GFP_KERNEL, OPA_MGMT_BASE_VERSION);
649 memcpy(vema_mad, mad_wc->recv_buf.mad, IB_MGMT_VENDOR_HDR);
650 vema_mad->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
651 vema_mad->mad_hdr.status = 0;
653 /* Lock ensures network adapter is not removed */
654 mutex_lock(&port->lock);
656 switch (mad_wc->recv_buf.mad->mad_hdr.method) {
657 case IB_MGMT_METHOD_GET:
658 vema_get(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
661 case IB_MGMT_METHOD_SET:
662 vema_set(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad,
666 vema_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR;
669 mutex_unlock(&port->lock);
671 if (!ib_post_send_mad(rsp, NULL)) {
673 * with post send successful ah and send mad
674 * will be destroyed in send handler
679 ib_free_send_mad(rsp);
684 ib_free_recv_mad(mad_wc);
688 * vema_get_port -- Gets the opa_vnic_vema_port
689 * @cport: pointer to control dev
690 * @port_num: Port number
692 * This function loops through the ports and returns
693 * the opa_vnic_vema port structure that is associated
694 * with the OPA port number
696 * Return: ptr to requested opa_vnic_vema_port strucure
697 * if success, NULL if not
699 static struct opa_vnic_vema_port *
700 vema_get_port(struct opa_vnic_ctrl_port *cport, u8 port_num)
702 struct opa_vnic_vema_port *port = (void *)cport + sizeof(*cport);
704 if (port_num > cport->num_ports)
707 return port + (port_num - 1);
711 * opa_vnic_vema_send_trap -- This function sends a trap to the EM
712 * @cport: pointer to vnic control port
713 * @data: pointer to trap data filled by calling function
714 * @lid: issuers lid (encap_slid from vesw_port_info)
716 * This function is called from the VNIC driver to send a trap if there
717 * is somethng the EM should be notified about. These events currently
719 * 1) UNICAST INTERFACE MACADDRESS changes
720 * 2) MULTICAST INTERFACE MACADDRESS changes
721 * 3) ETHERNET LINK STATUS changes
722 * While allocating the send mad the remote site qpn used is 1
723 * as this is the well known QP.
726 void opa_vnic_vema_send_trap(struct opa_vnic_adapter *adapter,
727 struct __opa_veswport_trap *data, u32 lid)
729 struct opa_vnic_ctrl_port *cport = adapter->cport;
730 struct ib_mad_send_buf *send_buf;
731 struct opa_vnic_vema_port *port;
732 struct ib_device *ibp;
733 struct opa_vnic_vema_mad_trap *trap_mad;
734 struct opa_class_port_info *class;
735 struct rdma_ah_attr ah_attr;
737 struct opa_veswport_trap *trap;
744 port = vema_get_port(cport, data->opaportnum);
745 if (!port || !port->mad_agent)
748 if (time_before(jiffies, adapter->trap_timeout)) {
749 if (adapter->trap_count == OPA_VNIC_TRAP_BURST_LIMIT) {
750 v_warn("Trap rate exceeded\n");
753 adapter->trap_count++;
756 adapter->trap_count = 0;
759 class = &port->class_port_info;
760 /* Set up address handle */
761 memset(&ah_attr, 0, sizeof(ah_attr));
762 ah_attr.type = rdma_ah_find_type(ibp, port->port_num);
763 rdma_ah_set_sl(&ah_attr,
764 GET_TRAP_SL_FROM_CLASS_PORT_INFO(class->trap_sl_rsvd));
765 rdma_ah_set_port_num(&ah_attr, port->port_num);
766 trap_lid = be32_to_cpu(class->trap_lid);
768 * check for trap lid validity, must not be zero
769 * The trap sink could change after we fashion the MAD but since traps
770 * are not guaranteed we won't use a lock as anyway the change will take
771 * place even with locking.
774 c_err("%s: Invalid dlid\n", __func__);
778 rdma_ah_set_dlid(&ah_attr, trap_lid);
779 ah = rdma_create_ah(port->mad_agent->qp->pd, &ah_attr);
781 c_err("%s:Couldn't create new AH = %p\n", __func__, ah);
782 c_err("%s:dlid = %d, sl = %d, port = %d\n", __func__,
783 rdma_ah_get_dlid(&ah_attr), rdma_ah_get_sl(&ah_attr),
784 rdma_ah_get_port_num(&ah_attr));
788 if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_FULL,
790 c_err("%s:full key not found, defaulting to partial\n",
792 if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_PARTIAL,
797 send_buf = ib_create_send_mad(port->mad_agent, 1, pkey_idx, 0,
798 IB_MGMT_VENDOR_HDR, IB_MGMT_MAD_DATA,
799 GFP_ATOMIC, OPA_MGMT_BASE_VERSION);
800 if (IS_ERR(send_buf)) {
801 c_err("%s:Couldn't allocate send buf\n", __func__);
807 /* Set up common MAD hdr */
808 trap_mad = send_buf->mad;
809 trap_mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION;
810 trap_mad->mad_hdr.mgmt_class = OPA_MGMT_CLASS_INTEL_EMA;
811 trap_mad->mad_hdr.class_version = OPA_EMA_CLASS_VERSION;
812 trap_mad->mad_hdr.method = IB_MGMT_METHOD_TRAP;
814 trap_mad->mad_hdr.tid = cpu_to_be64(port->tid);
815 trap_mad->mad_hdr.attr_id = IB_SMP_ATTR_NOTICE;
817 /* Set up vendor OUI */
818 trap_mad->oui[0] = INTEL_OUI_1;
819 trap_mad->oui[1] = INTEL_OUI_2;
820 trap_mad->oui[2] = INTEL_OUI_3;
822 /* Setup notice attribute portion */
823 trap_mad->notice.gen_type = OPA_INTEL_EMA_NOTICE_TYPE_INFO << 1;
824 trap_mad->notice.oui_1 = INTEL_OUI_1;
825 trap_mad->notice.oui_2 = INTEL_OUI_2;
826 trap_mad->notice.oui_3 = INTEL_OUI_3;
827 trap_mad->notice.issuer_lid = cpu_to_be32(lid);
829 /* copy the actual trap data */
830 trap = (struct opa_veswport_trap *)trap_mad->notice.raw_data;
831 trap->fabric_id = cpu_to_be16(data->fabric_id);
832 trap->veswid = cpu_to_be16(data->veswid);
833 trap->veswportnum = cpu_to_be32(data->veswportnum);
834 trap->opaportnum = cpu_to_be16(data->opaportnum);
835 trap->veswportindex = data->veswportindex;
836 trap->opcode = data->opcode;
838 /* If successful send set up rate limit timeout else bail */
839 if (ib_post_send_mad(send_buf, NULL)) {
840 ib_free_send_mad(send_buf);
842 if (adapter->trap_count)
844 adapter->trap_timeout = jiffies +
845 usecs_to_jiffies(OPA_VNIC_TRAP_TIMEOUT);
852 v_err("Aborting trap\n");
855 static int vema_rem_vport(int id, void *p, void *data)
857 struct opa_vnic_adapter *adapter = p;
859 opa_vnic_rem_netdev(adapter);
863 static int vema_enable_vport(int id, void *p, void *data)
865 struct opa_vnic_adapter *adapter = p;
867 netif_carrier_on(adapter->netdev);
871 static int vema_disable_vport(int id, void *p, void *data)
873 struct opa_vnic_adapter *adapter = p;
875 netif_carrier_off(adapter->netdev);
879 static void opa_vnic_event(struct ib_event_handler *handler,
880 struct ib_event *record)
882 struct opa_vnic_vema_port *port =
883 container_of(handler, struct opa_vnic_vema_port, event_handler);
884 struct opa_vnic_ctrl_port *cport = port->cport;
886 if (record->element.port_num != port->port_num)
889 c_dbg("OPA_VNIC received event %d on device %s port %d\n",
890 record->event, record->device->name, record->element.port_num);
892 if (record->event == IB_EVENT_PORT_ERR)
893 idr_for_each(&port->vport_idr, vema_disable_vport, NULL);
894 if (record->event == IB_EVENT_PORT_ACTIVE)
895 idr_for_each(&port->vport_idr, vema_enable_vport, NULL);
899 * vema_unregister -- Unregisters agent
900 * @cport: pointer to control port
902 * This deletes the registration by VEMA for MADs
904 static void vema_unregister(struct opa_vnic_ctrl_port *cport)
908 for (i = 1; i <= cport->num_ports; i++) {
909 struct opa_vnic_vema_port *port = vema_get_port(cport, i);
911 if (!port->mad_agent)
914 /* Lock ensures no MAD is being processed */
915 mutex_lock(&port->lock);
916 idr_for_each(&port->vport_idr, vema_rem_vport, NULL);
917 mutex_unlock(&port->lock);
919 ib_unregister_mad_agent(port->mad_agent);
920 port->mad_agent = NULL;
921 mutex_destroy(&port->lock);
922 idr_destroy(&port->vport_idr);
923 ib_unregister_event_handler(&port->event_handler);
928 * vema_register -- Registers agent
929 * @cport: pointer to control port
931 * This function registers the handlers for the VEMA MADs
933 * Return: returns 0 on success. non zero otherwise
935 static int vema_register(struct opa_vnic_ctrl_port *cport)
937 struct ib_mad_reg_req reg_req = {
938 .mgmt_class = OPA_MGMT_CLASS_INTEL_EMA,
939 .mgmt_class_version = OPA_MGMT_BASE_VERSION,
940 .oui = { INTEL_OUI_1, INTEL_OUI_2, INTEL_OUI_3 }
944 set_bit(IB_MGMT_METHOD_GET, reg_req.method_mask);
945 set_bit(IB_MGMT_METHOD_SET, reg_req.method_mask);
947 /* register ib event handler and mad agent for each port on dev */
948 for (i = 1; i <= cport->num_ports; i++) {
949 struct opa_vnic_vema_port *port = vema_get_port(cport, i);
955 INIT_IB_EVENT_HANDLER(&port->event_handler,
956 cport->ibdev, opa_vnic_event);
957 ib_register_event_handler(&port->event_handler);
959 idr_init(&port->vport_idr);
960 mutex_init(&port->lock);
961 port->mad_agent = ib_register_mad_agent(cport->ibdev, i,
962 IB_QPT_GSI, ®_req,
963 IB_MGMT_RMPP_VERSION,
964 vema_send, vema_recv,
966 if (IS_ERR(port->mad_agent)) {
967 ret = PTR_ERR(port->mad_agent);
968 port->mad_agent = NULL;
969 mutex_destroy(&port->lock);
970 idr_destroy(&port->vport_idr);
971 vema_unregister(cport);
980 * opa_vnic_ctrl_config_dev -- This function sends a trap to the EM
981 * by way of ib_modify_port to indicate support for ethernet on the
983 * @cport: pointer to control port
984 * @en: enable or disable ethernet on fabric support
986 static void opa_vnic_ctrl_config_dev(struct opa_vnic_ctrl_port *cport, bool en)
988 struct ib_port_modify pm = { 0 };
992 pm.set_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
994 pm.clr_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported;
996 for (i = 1; i <= cport->num_ports; i++)
997 ib_modify_port(cport->ibdev, i, IB_PORT_OPA_MASK_CHG, &pm);
1001 * opa_vnic_vema_add_one -- Handle new ib device
1002 * @device: ib device pointer
1004 * Allocate the vnic control port and initialize it.
1006 static void opa_vnic_vema_add_one(struct ib_device *device)
1008 struct opa_vnic_ctrl_port *cport;
1009 int rc, size = sizeof(*cport);
1011 if (!rdma_cap_opa_vnic(device))
1014 size += device->phys_port_cnt * sizeof(struct opa_vnic_vema_port);
1015 cport = kzalloc(size, GFP_KERNEL);
1019 cport->num_ports = device->phys_port_cnt;
1020 cport->ibdev = device;
1022 /* Initialize opa vnic management agent (vema) */
1023 rc = vema_register(cport);
1025 c_info("VNIC client initialized\n");
1027 ib_set_client_data(device, &opa_vnic_client, cport);
1028 opa_vnic_ctrl_config_dev(cport, true);
1032 * opa_vnic_vema_rem_one -- Handle ib device removal
1033 * @device: ib device pointer
1034 * @client_data: ib client data
1036 * Uninitialize and free the vnic control port.
1038 static void opa_vnic_vema_rem_one(struct ib_device *device,
1041 struct opa_vnic_ctrl_port *cport = client_data;
1046 c_info("removing VNIC client\n");
1047 opa_vnic_ctrl_config_dev(cport, false);
1048 vema_unregister(cport);
1052 static int __init opa_vnic_init(void)
1056 pr_info("OPA Virtual Network Driver - v%s\n",
1057 opa_vnic_driver_version);
1059 rc = ib_register_client(&opa_vnic_client);
1061 pr_err("VNIC driver register failed %d\n", rc);
1065 module_init(opa_vnic_init);
1067 static void opa_vnic_deinit(void)
1069 ib_unregister_client(&opa_vnic_client);
1071 module_exit(opa_vnic_deinit);
1073 MODULE_LICENSE("Dual BSD/GPL");
1074 MODULE_AUTHOR("Intel Corporation");
1075 MODULE_DESCRIPTION("Intel OPA Virtual Network driver");