2 * Copyright (C) 2013-2014 Chelsio Communications. All rights reserved.
4 * Written by Anish Bhatt (anish@chelsio.com)
5 * Casey Leedom (leedom@chelsio.com)
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * The full GNU General Public License is included in this distribution in
17 * the file called "COPYING".
23 /* DCBx version control
25 char *dcb_ver_array[] = {
34 /* Initialize a port's Data Center Bridging state. Typically used after a
37 void cxgb4_dcb_state_init(struct net_device *dev)
39 struct port_info *pi = netdev2pinfo(dev);
40 struct port_dcb_info *dcb = &pi->dcb;
41 int version_temp = dcb->dcb_version;
43 memset(dcb, 0, sizeof(struct port_dcb_info));
44 dcb->state = CXGB4_DCB_STATE_START;
46 dcb->dcb_version = version_temp;
48 netdev_dbg(dev, "%s: Initializing DCB state for port[%d]\n",
49 __func__, pi->port_id);
52 void cxgb4_dcb_version_init(struct net_device *dev)
54 struct port_info *pi = netdev2pinfo(dev);
55 struct port_dcb_info *dcb = &pi->dcb;
57 /* Any writes here are only done on kernels that exlicitly need
58 * a specific version, say < 2.6.38 which only support CEE
60 dcb->dcb_version = FW_PORT_DCB_VER_AUTO;
63 static void cxgb4_dcb_cleanup_apps(struct net_device *dev)
65 struct port_info *pi = netdev2pinfo(dev);
66 struct adapter *adap = pi->adapter;
67 struct port_dcb_info *dcb = &pi->dcb;
71 /* zero priority implies remove */
74 for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
75 /* Check if app list is exhausted */
76 if (!dcb->app_priority[i].protocolid)
79 app.protocol = dcb->app_priority[i].protocolid;
81 if (dcb->dcb_version == FW_PORT_DCB_VER_IEEE) {
82 app.priority = dcb->app_priority[i].user_prio_map;
83 app.selector = dcb->app_priority[i].sel_field + 1;
84 err = dcb_ieee_delapp(dev, &app);
86 app.selector = !!(dcb->app_priority[i].sel_field);
87 err = dcb_setapp(dev, &app);
91 dev_err(adap->pdev_dev,
92 "Failed DCB Clear %s Application Priority: sel=%d, prot=%d, , err=%d\n",
93 dcb_ver_array[dcb->dcb_version], app.selector,
100 /* Finite State machine for Data Center Bridging.
102 void cxgb4_dcb_state_fsm(struct net_device *dev,
103 enum cxgb4_dcb_state_input transition_to)
105 struct port_info *pi = netdev2pinfo(dev);
106 struct port_dcb_info *dcb = &pi->dcb;
107 struct adapter *adap = pi->adapter;
108 enum cxgb4_dcb_state current_state = dcb->state;
110 netdev_dbg(dev, "%s: State change from %d to %d for %s\n",
111 __func__, dcb->state, transition_to, dev->name);
113 switch (current_state) {
114 case CXGB4_DCB_STATE_START: {
115 switch (transition_to) {
116 case CXGB4_DCB_INPUT_FW_DISABLED: {
117 /* we're going to use Host DCB */
118 dcb->state = CXGB4_DCB_STATE_HOST;
119 dcb->supported = CXGB4_DCBX_HOST_SUPPORT;
123 case CXGB4_DCB_INPUT_FW_ENABLED: {
124 /* we're going to use Firmware DCB */
125 dcb->state = CXGB4_DCB_STATE_FW_INCOMPLETE;
126 dcb->supported = DCB_CAP_DCBX_LLD_MANAGED;
127 if (dcb->dcb_version == FW_PORT_DCB_VER_IEEE)
128 dcb->supported |= DCB_CAP_DCBX_VER_IEEE;
130 dcb->supported |= DCB_CAP_DCBX_VER_CEE;
134 case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
135 /* expected transition */
139 case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
140 dcb->state = CXGB4_DCB_STATE_FW_ALLSYNCED;
145 goto bad_state_input;
150 case CXGB4_DCB_STATE_FW_INCOMPLETE: {
151 switch (transition_to) {
152 case CXGB4_DCB_INPUT_FW_ENABLED: {
153 /* we're alreaady in firmware DCB mode */
157 case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
158 /* we're already incomplete */
162 case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
163 dcb->state = CXGB4_DCB_STATE_FW_ALLSYNCED;
165 linkwatch_fire_event(dev);
170 goto bad_state_input;
175 case CXGB4_DCB_STATE_FW_ALLSYNCED: {
176 switch (transition_to) {
177 case CXGB4_DCB_INPUT_FW_ENABLED: {
178 /* we're alreaady in firmware DCB mode */
182 case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
183 /* We were successfully running with firmware DCB but
184 * now it's telling us that it's in an "incomplete
185 * state. We need to reset back to a ground state
188 cxgb4_dcb_cleanup_apps(dev);
189 cxgb4_dcb_state_init(dev);
190 dcb->state = CXGB4_DCB_STATE_FW_INCOMPLETE;
191 dcb->supported = CXGB4_DCBX_FW_SUPPORT;
192 linkwatch_fire_event(dev);
196 case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
197 /* we're already all sync'ed
198 * this is only applicable for IEEE or
199 * when another VI already completed negotiaton
202 linkwatch_fire_event(dev);
207 goto bad_state_input;
212 case CXGB4_DCB_STATE_HOST: {
213 switch (transition_to) {
214 case CXGB4_DCB_INPUT_FW_DISABLED: {
215 /* we're alreaady in Host DCB mode */
220 goto bad_state_input;
226 goto bad_state_transition;
231 dev_err(adap->pdev_dev, "cxgb4_dcb_state_fsm: illegal input symbol %d\n",
235 bad_state_transition:
236 dev_err(adap->pdev_dev, "cxgb4_dcb_state_fsm: bad state transition, state = %d, input = %d\n",
237 current_state, transition_to);
240 /* Handle a DCB/DCBX update message from the firmware.
242 void cxgb4_dcb_handle_fw_update(struct adapter *adap,
243 const struct fw_port_cmd *pcmd)
245 const union fw_port_dcb *fwdcb = &pcmd->u.dcb;
246 int port = FW_PORT_CMD_PORTID_GET(be32_to_cpu(pcmd->op_to_portid));
247 struct net_device *dev = adap->port[port];
248 struct port_info *pi = netdev_priv(dev);
249 struct port_dcb_info *dcb = &pi->dcb;
250 int dcb_type = pcmd->u.dcb.pgid.type;
251 int dcb_running_version;
253 /* Handle Firmware DCB Control messages separately since they drive
256 if (dcb_type == FW_PORT_DCB_TYPE_CONTROL) {
257 enum cxgb4_dcb_state_input input =
258 ((pcmd->u.dcb.control.all_syncd_pkd &
259 FW_PORT_CMD_ALL_SYNCD)
260 ? CXGB4_DCB_STATE_FW_ALLSYNCED
261 : CXGB4_DCB_STATE_FW_INCOMPLETE);
263 if (dcb->dcb_version != FW_PORT_DCB_VER_UNKNOWN) {
264 dcb_running_version = FW_PORT_CMD_DCB_VERSION_GET(
266 pcmd->u.dcb.control.dcb_version_to_app_state));
267 if (dcb_running_version == FW_PORT_DCB_VER_CEE1D01 ||
268 dcb_running_version == FW_PORT_DCB_VER_IEEE) {
269 dcb->dcb_version = dcb_running_version;
270 dev_warn(adap->pdev_dev, "Interface %s is running %s\n",
272 dcb_ver_array[dcb->dcb_version]);
274 dev_warn(adap->pdev_dev,
275 "Something screwed up, requested firmware for %s, but firmware returned %s instead\n",
276 dcb_ver_array[dcb->dcb_version],
277 dcb_ver_array[dcb_running_version]);
278 dcb->dcb_version = FW_PORT_DCB_VER_UNKNOWN;
282 cxgb4_dcb_state_fsm(dev, input);
286 /* It's weird, and almost certainly an error, to get Firmware DCB
287 * messages when we either haven't been told whether we're going to be
288 * doing Host or Firmware DCB; and even worse when we've been told
289 * that we're doing Host DCB!
291 if (dcb->state == CXGB4_DCB_STATE_START ||
292 dcb->state == CXGB4_DCB_STATE_HOST) {
293 dev_err(adap->pdev_dev, "Receiving Firmware DCB messages in State %d\n",
298 /* Now handle the general Firmware DCB update messages ...
301 case FW_PORT_DCB_TYPE_PGID:
302 dcb->pgid = be32_to_cpu(fwdcb->pgid.pgid);
303 dcb->msgs |= CXGB4_DCB_FW_PGID;
306 case FW_PORT_DCB_TYPE_PGRATE:
307 dcb->pg_num_tcs_supported = fwdcb->pgrate.num_tcs_supported;
308 memcpy(dcb->pgrate, &fwdcb->pgrate.pgrate,
309 sizeof(dcb->pgrate));
310 memcpy(dcb->tsa, &fwdcb->pgrate.tsa,
312 dcb->msgs |= CXGB4_DCB_FW_PGRATE;
313 if (dcb->msgs & CXGB4_DCB_FW_PGID)
314 IEEE_FAUX_SYNC(dev, dcb);
317 case FW_PORT_DCB_TYPE_PRIORATE:
318 memcpy(dcb->priorate, &fwdcb->priorate.strict_priorate,
319 sizeof(dcb->priorate));
320 dcb->msgs |= CXGB4_DCB_FW_PRIORATE;
323 case FW_PORT_DCB_TYPE_PFC:
324 dcb->pfcen = fwdcb->pfc.pfcen;
325 dcb->pfc_num_tcs_supported = fwdcb->pfc.max_pfc_tcs;
326 dcb->msgs |= CXGB4_DCB_FW_PFC;
327 IEEE_FAUX_SYNC(dev, dcb);
330 case FW_PORT_DCB_TYPE_APP_ID: {
331 const struct fw_port_app_priority *fwap = &fwdcb->app_priority;
333 struct app_priority *ap = &dcb->app_priority[idx];
335 struct dcb_app app = {
336 .protocol = be16_to_cpu(fwap->protocolid),
340 /* Convert from firmware format to relevant format
341 * when using app selector
343 if (dcb->dcb_version == FW_PORT_DCB_VER_IEEE) {
344 app.selector = (fwap->sel_field + 1);
345 app.priority = ffs(fwap->user_prio_map) - 1;
346 err = dcb_ieee_setapp(dev, &app);
347 IEEE_FAUX_SYNC(dev, dcb);
350 app.selector = !!(fwap->sel_field);
351 app.priority = fwap->user_prio_map;
352 err = dcb_setapp(dev, &app);
356 dev_err(adap->pdev_dev,
357 "Failed DCB Set Application Priority: sel=%d, prot=%d, prio=%d, err=%d\n",
358 app.selector, app.protocol, app.priority, -err);
360 ap->user_prio_map = fwap->user_prio_map;
361 ap->sel_field = fwap->sel_field;
362 ap->protocolid = be16_to_cpu(fwap->protocolid);
363 dcb->msgs |= CXGB4_DCB_FW_APP_ID;
368 dev_err(adap->pdev_dev, "Unknown DCB update type received %x\n",
374 /* Data Center Bridging netlink operations.
378 /* Get current DCB enabled/disabled state.
380 static u8 cxgb4_getstate(struct net_device *dev)
382 struct port_info *pi = netdev2pinfo(dev);
384 return pi->dcb.enabled;
387 /* Set DCB enabled/disabled.
389 static u8 cxgb4_setstate(struct net_device *dev, u8 enabled)
391 struct port_info *pi = netdev2pinfo(dev);
393 /* If DCBx is host-managed, dcb is enabled by outside lldp agents */
394 if (pi->dcb.state == CXGB4_DCB_STATE_HOST) {
395 pi->dcb.enabled = enabled;
399 /* Firmware doesn't provide any mechanism to control the DCB state.
401 if (enabled != (pi->dcb.state == CXGB4_DCB_STATE_FW_ALLSYNCED))
407 static void cxgb4_getpgtccfg(struct net_device *dev, int tc,
408 u8 *prio_type, u8 *pgid, u8 *bw_per,
409 u8 *up_tc_map, int local)
411 struct fw_port_cmd pcmd;
412 struct port_info *pi = netdev2pinfo(dev);
413 struct adapter *adap = pi->adapter;
416 *prio_type = *pgid = *bw_per = *up_tc_map = 0;
419 INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
421 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
423 pcmd.u.dcb.pgid.type = FW_PORT_DCB_TYPE_PGID;
424 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
425 if (err != FW_PORT_DCB_CFG_SUCCESS) {
426 dev_err(adap->pdev_dev, "DCB read PGID failed with %d\n", -err);
429 *pgid = (be32_to_cpu(pcmd.u.dcb.pgid.pgid) >> (tc * 4)) & 0xf;
431 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
432 pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
433 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
434 if (err != FW_PORT_DCB_CFG_SUCCESS) {
435 dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
440 *bw_per = pcmd.u.dcb.pgrate.pgrate[*pgid];
441 *up_tc_map = (1 << tc);
443 /* prio_type is link strict */
448 static void cxgb4_getpgtccfg_tx(struct net_device *dev, int tc,
449 u8 *prio_type, u8 *pgid, u8 *bw_per,
452 /* tc 0 is written at MSB position */
453 return cxgb4_getpgtccfg(dev, (7 - tc), prio_type, pgid, bw_per,
458 static void cxgb4_getpgtccfg_rx(struct net_device *dev, int tc,
459 u8 *prio_type, u8 *pgid, u8 *bw_per,
462 /* tc 0 is written at MSB position */
463 return cxgb4_getpgtccfg(dev, (7 - tc), prio_type, pgid, bw_per,
467 static void cxgb4_setpgtccfg_tx(struct net_device *dev, int tc,
468 u8 prio_type, u8 pgid, u8 bw_per,
471 struct fw_port_cmd pcmd;
472 struct port_info *pi = netdev2pinfo(dev);
473 struct adapter *adap = pi->adapter;
478 if (pgid == DCB_ATTR_VALUE_UNDEFINED)
480 if (bw_per == DCB_ATTR_VALUE_UNDEFINED)
483 INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
484 pcmd.u.dcb.pgid.type = FW_PORT_DCB_TYPE_PGID;
486 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
487 if (err != FW_PORT_DCB_CFG_SUCCESS) {
488 dev_err(adap->pdev_dev, "DCB read PGID failed with %d\n", -err);
492 _pgid = be32_to_cpu(pcmd.u.dcb.pgid.pgid);
493 _pgid &= ~(0xF << (fw_tc * 4));
494 _pgid |= pgid << (fw_tc * 4);
495 pcmd.u.dcb.pgid.pgid = cpu_to_be32(_pgid);
497 INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
499 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
500 if (err != FW_PORT_DCB_CFG_SUCCESS) {
501 dev_err(adap->pdev_dev, "DCB write PGID failed with %d\n",
506 memset(&pcmd, 0, sizeof(struct fw_port_cmd));
508 INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
509 pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
511 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
512 if (err != FW_PORT_DCB_CFG_SUCCESS) {
513 dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
518 pcmd.u.dcb.pgrate.pgrate[pgid] = bw_per;
520 INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
521 if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
522 pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
524 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
525 if (err != FW_PORT_DCB_CFG_SUCCESS)
526 dev_err(adap->pdev_dev, "DCB write PGRATE failed with %d\n",
530 static void cxgb4_getpgbwgcfg(struct net_device *dev, int pgid, u8 *bw_per,
533 struct fw_port_cmd pcmd;
534 struct port_info *pi = netdev2pinfo(dev);
535 struct adapter *adap = pi->adapter;
539 INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
541 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
543 pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
544 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
545 if (err != FW_PORT_DCB_CFG_SUCCESS) {
546 dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
551 *bw_per = pcmd.u.dcb.pgrate.pgrate[pgid];
554 static void cxgb4_getpgbwgcfg_tx(struct net_device *dev, int pgid, u8 *bw_per)
556 return cxgb4_getpgbwgcfg(dev, pgid, bw_per, 1);
559 static void cxgb4_getpgbwgcfg_rx(struct net_device *dev, int pgid, u8 *bw_per)
561 return cxgb4_getpgbwgcfg(dev, pgid, bw_per, 0);
564 static void cxgb4_setpgbwgcfg_tx(struct net_device *dev, int pgid,
567 struct fw_port_cmd pcmd;
568 struct port_info *pi = netdev2pinfo(dev);
569 struct adapter *adap = pi->adapter;
572 INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
573 pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
575 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
576 if (err != FW_PORT_DCB_CFG_SUCCESS) {
577 dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
582 pcmd.u.dcb.pgrate.pgrate[pgid] = bw_per;
584 INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
585 if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
586 pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
588 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
590 if (err != FW_PORT_DCB_CFG_SUCCESS)
591 dev_err(adap->pdev_dev, "DCB write PGRATE failed with %d\n",
595 /* Return whether the specified Traffic Class Priority has Priority Pause
598 static void cxgb4_getpfccfg(struct net_device *dev, int priority, u8 *pfccfg)
600 struct port_info *pi = netdev2pinfo(dev);
601 struct port_dcb_info *dcb = &pi->dcb;
603 if (dcb->state != CXGB4_DCB_STATE_FW_ALLSYNCED ||
604 priority >= CXGB4_MAX_PRIORITY)
607 *pfccfg = (pi->dcb.pfcen >> (7 - priority)) & 1;
610 /* Enable/disable Priority Pause Frames for the specified Traffic Class
613 static void cxgb4_setpfccfg(struct net_device *dev, int priority, u8 pfccfg)
615 struct fw_port_cmd pcmd;
616 struct port_info *pi = netdev2pinfo(dev);
617 struct adapter *adap = pi->adapter;
620 if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED ||
621 priority >= CXGB4_MAX_PRIORITY)
624 INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
625 if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
626 pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
628 pcmd.u.dcb.pfc.type = FW_PORT_DCB_TYPE_PFC;
629 pcmd.u.dcb.pfc.pfcen = pi->dcb.pfcen;
632 pcmd.u.dcb.pfc.pfcen |= (1 << (7 - priority));
634 pcmd.u.dcb.pfc.pfcen &= (~(1 << (7 - priority)));
636 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
637 if (err != FW_PORT_DCB_CFG_SUCCESS) {
638 dev_err(adap->pdev_dev, "DCB PFC write failed with %d\n", -err);
642 pi->dcb.pfcen = pcmd.u.dcb.pfc.pfcen;
645 static u8 cxgb4_setall(struct net_device *dev)
650 /* Return DCB capabilities.
652 static u8 cxgb4_getcap(struct net_device *dev, int cap_id, u8 *caps)
654 struct port_info *pi = netdev2pinfo(dev);
657 case DCB_CAP_ATTR_PG:
658 case DCB_CAP_ATTR_PFC:
662 case DCB_CAP_ATTR_PG_TCS:
663 /* 8 priorities for PG represented by bitmap */
667 case DCB_CAP_ATTR_PFC_TCS:
668 /* 8 priorities for PFC represented by bitmap */
672 case DCB_CAP_ATTR_GSP:
676 case DCB_CAP_ATTR_UP2TC:
677 case DCB_CAP_ATTR_BCN:
681 case DCB_CAP_ATTR_DCBX:
682 *caps = pi->dcb.supported;
692 /* Return the number of Traffic Classes for the indicated Traffic Class ID.
694 static int cxgb4_getnumtcs(struct net_device *dev, int tcs_id, u8 *num)
696 struct port_info *pi = netdev2pinfo(dev);
699 case DCB_NUMTCS_ATTR_PG:
700 if (pi->dcb.msgs & CXGB4_DCB_FW_PGRATE)
701 *num = pi->dcb.pg_num_tcs_supported;
706 case DCB_NUMTCS_ATTR_PFC:
717 /* Set the number of Traffic Classes supported for the indicated Traffic Class
720 static int cxgb4_setnumtcs(struct net_device *dev, int tcs_id, u8 num)
722 /* Setting the number of Traffic Classes isn't supported.
727 /* Return whether Priority Flow Control is enabled. */
728 static u8 cxgb4_getpfcstate(struct net_device *dev)
730 struct port_info *pi = netdev2pinfo(dev);
732 if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
735 return pi->dcb.pfcen != 0;
738 /* Enable/disable Priority Flow Control. */
739 static void cxgb4_setpfcstate(struct net_device *dev, u8 state)
741 /* We can't enable/disable Priority Flow Control but we also can't
742 * return an error ...
746 /* Return the Application User Priority Map associated with the specified
749 static int __cxgb4_getapp(struct net_device *dev, u8 app_idtype, u16 app_id,
752 struct port_info *pi = netdev2pinfo(dev);
753 struct adapter *adap = pi->adapter;
756 if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
759 for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
760 struct fw_port_cmd pcmd;
764 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
766 INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
768 pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
769 pcmd.u.dcb.app_priority.idx = i;
771 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
772 if (err != FW_PORT_DCB_CFG_SUCCESS) {
773 dev_err(adap->pdev_dev, "DCB APP read failed with %d\n",
777 if (be16_to_cpu(pcmd.u.dcb.app_priority.protocolid) == app_id)
778 if (pcmd.u.dcb.app_priority.sel_field == app_idtype)
779 return pcmd.u.dcb.app_priority.user_prio_map;
781 /* exhausted app list */
782 if (!pcmd.u.dcb.app_priority.protocolid)
789 /* Return the Application User Priority Map associated with the specified
792 static int cxgb4_getapp(struct net_device *dev, u8 app_idtype, u16 app_id)
794 return __cxgb4_getapp(dev, app_idtype, app_id, 0);
797 /* Write a new Application User Priority Map for the specified Application ID
799 static int __cxgb4_setapp(struct net_device *dev, u8 app_idtype, u16 app_id,
802 struct fw_port_cmd pcmd;
803 struct port_info *pi = netdev2pinfo(dev);
804 struct adapter *adap = pi->adapter;
808 if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
811 /* DCB info gets thrown away on link up */
812 if (!netif_carrier_ok(dev))
815 for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
816 INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
817 pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
818 pcmd.u.dcb.app_priority.idx = i;
819 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
821 if (err != FW_PORT_DCB_CFG_SUCCESS) {
822 dev_err(adap->pdev_dev, "DCB app table read failed with %d\n",
826 if (be16_to_cpu(pcmd.u.dcb.app_priority.protocolid) == app_id) {
827 /* overwrite existing app table */
828 pcmd.u.dcb.app_priority.protocolid = 0;
831 /* find first empty slot */
832 if (!pcmd.u.dcb.app_priority.protocolid)
836 if (i == CXGB4_MAX_DCBX_APP_SUPPORTED) {
837 /* no empty slots available */
838 dev_err(adap->pdev_dev, "DCB app table full\n");
842 /* write out new app table entry */
843 INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
844 if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
845 pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
847 pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
848 pcmd.u.dcb.app_priority.protocolid = cpu_to_be16(app_id);
849 pcmd.u.dcb.app_priority.sel_field = app_idtype;
850 pcmd.u.dcb.app_priority.user_prio_map = app_prio;
851 pcmd.u.dcb.app_priority.idx = i;
853 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
854 if (err != FW_PORT_DCB_CFG_SUCCESS) {
855 dev_err(adap->pdev_dev, "DCB app table write failed with %d\n",
863 /* Priority for CEE inside dcb_app is bitmask, with 0 being an invalid value */
864 static int cxgb4_setapp(struct net_device *dev, u8 app_idtype, u16 app_id,
868 struct dcb_app app = {
869 .selector = app_idtype,
871 .priority = app_prio,
874 if (app_idtype != DCB_APP_IDTYPE_ETHTYPE &&
875 app_idtype != DCB_APP_IDTYPE_PORTNUM)
878 /* Convert app_idtype to a format that firmware understands */
879 ret = __cxgb4_setapp(dev, app_idtype == DCB_APP_IDTYPE_ETHTYPE ?
880 app_idtype : 3, app_id, app_prio);
884 return dcb_setapp(dev, &app);
887 /* Return whether IEEE Data Center Bridging has been negotiated.
890 cxgb4_ieee_negotiation_complete(struct net_device *dev,
891 enum cxgb4_dcb_fw_msgs dcb_subtype)
893 struct port_info *pi = netdev2pinfo(dev);
894 struct port_dcb_info *dcb = &pi->dcb;
896 if (dcb_subtype && !(dcb->msgs & dcb_subtype))
899 return (dcb->state == CXGB4_DCB_STATE_FW_ALLSYNCED &&
900 (dcb->supported & DCB_CAP_DCBX_VER_IEEE));
903 /* Fill in the Application User Priority Map associated with the
904 * specified Application.
905 * Priority for IEEE dcb_app is an integer, with 0 being a valid value
907 static int cxgb4_ieee_getapp(struct net_device *dev, struct dcb_app *app)
911 if (!cxgb4_ieee_negotiation_complete(dev, CXGB4_DCB_FW_APP_ID))
913 if (!(app->selector && app->protocol))
916 /* Try querying firmware first, use firmware format */
917 prio = __cxgb4_getapp(dev, app->selector - 1, app->protocol, 0);
920 prio = dcb_ieee_getapp_mask(dev, app);
922 app->priority = ffs(prio) - 1;
926 /* Write a new Application User Priority Map for the specified Application ID.
927 * Priority for IEEE dcb_app is an integer, with 0 being a valid value
929 static int cxgb4_ieee_setapp(struct net_device *dev, struct dcb_app *app)
933 if (!cxgb4_ieee_negotiation_complete(dev, CXGB4_DCB_FW_APP_ID))
935 if (!(app->selector && app->protocol))
938 if (!(app->selector > IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
939 app->selector < IEEE_8021QAZ_APP_SEL_ANY))
942 /* change selector to a format that firmware understands */
943 ret = __cxgb4_setapp(dev, app->selector - 1, app->protocol,
944 (1 << app->priority));
948 return dcb_ieee_setapp(dev, app);
951 /* Return our DCBX parameters.
953 static u8 cxgb4_getdcbx(struct net_device *dev)
955 struct port_info *pi = netdev2pinfo(dev);
957 /* This is already set by cxgb4_set_dcb_caps, so just return it */
958 return pi->dcb.supported;
961 /* Set our DCBX parameters.
963 static u8 cxgb4_setdcbx(struct net_device *dev, u8 dcb_request)
965 struct port_info *pi = netdev2pinfo(dev);
967 /* Filter out requests which exceed our capabilities.
969 if ((dcb_request & (CXGB4_DCBX_FW_SUPPORT | CXGB4_DCBX_HOST_SUPPORT))
973 /* Can't enable DCB if we haven't successfully negotiated it.
975 if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
978 /* There's currently no mechanism to allow for the firmware DCBX
979 * negotiation to be changed from the Host Driver. If the caller
980 * requests exactly the same parameters that we already have then
981 * we'll allow them to be successfully "set" ...
983 if (dcb_request != pi->dcb.supported)
986 pi->dcb.supported = dcb_request;
990 static int cxgb4_getpeer_app(struct net_device *dev,
991 struct dcb_peer_app_info *info, u16 *app_count)
993 struct fw_port_cmd pcmd;
994 struct port_info *pi = netdev2pinfo(dev);
995 struct adapter *adap = pi->adapter;
998 if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
1005 for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
1006 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
1007 pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
1008 pcmd.u.dcb.app_priority.idx = *app_count;
1009 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
1011 if (err != FW_PORT_DCB_CFG_SUCCESS) {
1012 dev_err(adap->pdev_dev, "DCB app table read failed with %d\n",
1017 /* find first empty slot */
1018 if (!pcmd.u.dcb.app_priority.protocolid)
1025 static int cxgb4_getpeerapp_tbl(struct net_device *dev, struct dcb_app *table)
1027 struct fw_port_cmd pcmd;
1028 struct port_info *pi = netdev2pinfo(dev);
1029 struct adapter *adap = pi->adapter;
1032 if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
1035 for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
1036 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
1037 pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
1038 pcmd.u.dcb.app_priority.idx = i;
1039 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
1041 if (err != FW_PORT_DCB_CFG_SUCCESS) {
1042 dev_err(adap->pdev_dev, "DCB app table read failed with %d\n",
1047 /* find first empty slot */
1048 if (!pcmd.u.dcb.app_priority.protocolid)
1051 table[i].selector = pcmd.u.dcb.app_priority.sel_field;
1053 be16_to_cpu(pcmd.u.dcb.app_priority.protocolid);
1055 ffs(pcmd.u.dcb.app_priority.user_prio_map) - 1;
1060 /* Return Priority Group information.
1062 static int cxgb4_cee_peer_getpg(struct net_device *dev, struct cee_pg *pg)
1064 struct fw_port_cmd pcmd;
1065 struct port_info *pi = netdev2pinfo(dev);
1066 struct adapter *adap = pi->adapter;
1070 /* We're always "willing" -- the Switch Fabric always dictates the
1071 * DCBX parameters to us.
1075 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
1076 pcmd.u.dcb.pgid.type = FW_PORT_DCB_TYPE_PGID;
1077 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
1078 if (err != FW_PORT_DCB_CFG_SUCCESS) {
1079 dev_err(adap->pdev_dev, "DCB read PGID failed with %d\n", -err);
1082 pgid = be32_to_cpu(pcmd.u.dcb.pgid.pgid);
1084 for (i = 0; i < CXGB4_MAX_PRIORITY; i++)
1085 pg->prio_pg[i] = (pgid >> (i * 4)) & 0xF;
1087 INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
1088 pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
1089 err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
1090 if (err != FW_PORT_DCB_CFG_SUCCESS) {
1091 dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
1096 for (i = 0; i < CXGB4_MAX_PRIORITY; i++)
1097 pg->pg_bw[i] = pcmd.u.dcb.pgrate.pgrate[i];
1102 /* Return Priority Flow Control information.
1104 static int cxgb4_cee_peer_getpfc(struct net_device *dev, struct cee_pfc *pfc)
1106 struct port_info *pi = netdev2pinfo(dev);
1108 cxgb4_getnumtcs(dev, DCB_NUMTCS_ATTR_PFC, &(pfc->tcs_supported));
1109 pfc->pfc_en = pi->dcb.pfcen;
1114 const struct dcbnl_rtnl_ops cxgb4_dcb_ops = {
1115 .ieee_getapp = cxgb4_ieee_getapp,
1116 .ieee_setapp = cxgb4_ieee_setapp,
1119 .getstate = cxgb4_getstate,
1120 .setstate = cxgb4_setstate,
1121 .getpgtccfgtx = cxgb4_getpgtccfg_tx,
1122 .getpgbwgcfgtx = cxgb4_getpgbwgcfg_tx,
1123 .getpgtccfgrx = cxgb4_getpgtccfg_rx,
1124 .getpgbwgcfgrx = cxgb4_getpgbwgcfg_rx,
1125 .setpgtccfgtx = cxgb4_setpgtccfg_tx,
1126 .setpgbwgcfgtx = cxgb4_setpgbwgcfg_tx,
1127 .setpfccfg = cxgb4_setpfccfg,
1128 .getpfccfg = cxgb4_getpfccfg,
1129 .setall = cxgb4_setall,
1130 .getcap = cxgb4_getcap,
1131 .getnumtcs = cxgb4_getnumtcs,
1132 .setnumtcs = cxgb4_setnumtcs,
1133 .getpfcstate = cxgb4_getpfcstate,
1134 .setpfcstate = cxgb4_setpfcstate,
1135 .getapp = cxgb4_getapp,
1136 .setapp = cxgb4_setapp,
1138 /* DCBX configuration */
1139 .getdcbx = cxgb4_getdcbx,
1140 .setdcbx = cxgb4_setdcbx,
1143 .peer_getappinfo = cxgb4_getpeer_app,
1144 .peer_getapptable = cxgb4_getpeerapp_tbl,
1147 .cee_peer_getpg = cxgb4_cee_peer_getpg,
1148 .cee_peer_getpfc = cxgb4_cee_peer_getpfc,