1 /* QLogic qed NIC Driver
2 * Copyright (c) 2015 QLogic Corporation
4 * This software is available under the terms of the GNU General Public License
5 * (GPL) Version 2, available from the file COPYING in the main directory of
9 #include <linux/types.h>
10 #include <asm/byteorder.h>
11 #include <linux/bitops.h>
12 #include <linux/errno.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/string.h>
22 #define QED_DCBX_MAX_MIB_READ_TRY (100)
23 #define QED_ETH_TYPE_DEFAULT (0)
24 #define QED_ETH_TYPE_ROCE (0x8915)
25 #define QED_UDP_PORT_TYPE_ROCE_V2 (0x12B7)
26 #define QED_ETH_TYPE_FCOE (0x8906)
27 #define QED_TCP_PORT_ISCSI (0xCBC)
29 #define QED_DCBX_INVALID_PRIORITY 0xFF
31 /* Get Traffic Class from priority traffic class table, 4 bits represent
32 * the traffic class corresponding to the priority.
34 #define QED_DCBX_PRIO2TC(prio_tc_tbl, prio) \
35 ((u32)(prio_tc_tbl >> ((7 - prio) * 4)) & 0x7)
37 static const struct qed_dcbx_app_metadata qed_dcbx_app_update[] = {
38 {DCBX_PROTOCOL_ISCSI, "ISCSI", QED_PCI_DEFAULT},
39 {DCBX_PROTOCOL_FCOE, "FCOE", QED_PCI_DEFAULT},
40 {DCBX_PROTOCOL_ROCE, "ROCE", QED_PCI_DEFAULT},
41 {DCBX_PROTOCOL_ROCE_V2, "ROCE_V2", QED_PCI_DEFAULT},
42 {DCBX_PROTOCOL_ETH, "ETH", QED_PCI_ETH}
45 static bool qed_dcbx_app_ethtype(u32 app_info_bitmap)
47 return !!(QED_MFW_GET_FIELD(app_info_bitmap, DCBX_APP_SF) ==
51 static bool qed_dcbx_app_port(u32 app_info_bitmap)
53 return !!(QED_MFW_GET_FIELD(app_info_bitmap, DCBX_APP_SF) ==
57 static bool qed_dcbx_default_tlv(u32 app_info_bitmap, u16 proto_id)
59 return !!(qed_dcbx_app_ethtype(app_info_bitmap) &&
60 proto_id == QED_ETH_TYPE_DEFAULT);
63 static bool qed_dcbx_iscsi_tlv(u32 app_info_bitmap, u16 proto_id)
65 return !!(qed_dcbx_app_port(app_info_bitmap) &&
66 proto_id == QED_TCP_PORT_ISCSI);
69 static bool qed_dcbx_fcoe_tlv(u32 app_info_bitmap, u16 proto_id)
71 return !!(qed_dcbx_app_ethtype(app_info_bitmap) &&
72 proto_id == QED_ETH_TYPE_FCOE);
75 static bool qed_dcbx_roce_tlv(u32 app_info_bitmap, u16 proto_id)
77 return !!(qed_dcbx_app_ethtype(app_info_bitmap) &&
78 proto_id == QED_ETH_TYPE_ROCE);
81 static bool qed_dcbx_roce_v2_tlv(u32 app_info_bitmap, u16 proto_id)
83 return !!(qed_dcbx_app_port(app_info_bitmap) &&
84 proto_id == QED_UDP_PORT_TYPE_ROCE_V2);
88 qed_dcbx_dp_protocol(struct qed_hwfn *p_hwfn, struct qed_dcbx_results *p_data)
90 enum dcbx_protocol_type id;
93 DP_VERBOSE(p_hwfn, QED_MSG_DCB, "DCBX negotiated: %d\n",
94 p_data->dcbx_enabled);
96 for (i = 0; i < ARRAY_SIZE(qed_dcbx_app_update); i++) {
97 id = qed_dcbx_app_update[i].id;
99 DP_VERBOSE(p_hwfn, QED_MSG_DCB,
100 "%s info: update %d, enable %d, prio %d, tc %d, num_tc %d\n",
101 qed_dcbx_app_update[i].name, p_data->arr[id].update,
102 p_data->arr[id].enable, p_data->arr[id].priority,
103 p_data->arr[id].tc, p_hwfn->hw_info.num_tc);
108 qed_dcbx_set_params(struct qed_dcbx_results *p_data,
109 struct qed_hw_info *p_info,
114 enum dcbx_protocol_type type,
115 enum qed_pci_personality personality)
117 /* PF update ramrod data */
118 p_data->arr[type].update = update;
119 p_data->arr[type].enable = enable;
120 p_data->arr[type].priority = prio;
121 p_data->arr[type].tc = tc;
124 if (p_info->personality == personality) {
125 if (personality == QED_PCI_ETH)
126 p_info->non_offload_tc = tc;
128 p_info->offload_tc = tc;
132 /* Update app protocol data and hw_info fields with the TLV info */
134 qed_dcbx_update_app_info(struct qed_dcbx_results *p_data,
135 struct qed_hwfn *p_hwfn,
138 u8 prio, u8 tc, enum dcbx_protocol_type type)
140 struct qed_hw_info *p_info = &p_hwfn->hw_info;
141 enum qed_pci_personality personality;
142 enum dcbx_protocol_type id;
146 for (i = 0; i < ARRAY_SIZE(qed_dcbx_app_update); i++) {
147 id = qed_dcbx_app_update[i].id;
152 personality = qed_dcbx_app_update[i].personality;
153 name = qed_dcbx_app_update[i].name;
155 qed_dcbx_set_params(p_data, p_info, enable, update,
156 prio, tc, type, personality);
161 qed_dcbx_get_app_protocol_type(struct qed_hwfn *p_hwfn,
163 u16 id, enum dcbx_protocol_type *type)
165 if (qed_dcbx_fcoe_tlv(app_prio_bitmap, id)) {
166 *type = DCBX_PROTOCOL_FCOE;
167 } else if (qed_dcbx_roce_tlv(app_prio_bitmap, id)) {
168 *type = DCBX_PROTOCOL_ROCE;
169 } else if (qed_dcbx_iscsi_tlv(app_prio_bitmap, id)) {
170 *type = DCBX_PROTOCOL_ISCSI;
171 } else if (qed_dcbx_default_tlv(app_prio_bitmap, id)) {
172 *type = DCBX_PROTOCOL_ETH;
173 } else if (qed_dcbx_roce_v2_tlv(app_prio_bitmap, id)) {
174 *type = DCBX_PROTOCOL_ROCE_V2;
176 *type = DCBX_MAX_PROTOCOL_TYPE;
178 "No action required, App TLV id = 0x%x app_prio_bitmap = 0x%x\n",
179 id, app_prio_bitmap);
186 /* Parse app TLV's to update TC information in hw_info structure for
187 * reconfiguring QM. Get protocol specific data for PF update ramrod command.
190 qed_dcbx_process_tlv(struct qed_hwfn *p_hwfn,
191 struct qed_dcbx_results *p_data,
192 struct dcbx_app_priority_entry *p_tbl,
193 u32 pri_tc_tbl, int count, bool dcbx_enabled)
196 enum dcbx_protocol_type type;
202 DP_VERBOSE(p_hwfn, QED_MSG_DCB, "Num APP entries = %d\n", count);
205 for (i = 0; i < count; i++) {
206 protocol_id = QED_MFW_GET_FIELD(p_tbl[i].entry,
207 DCBX_APP_PROTOCOL_ID);
208 priority_map = QED_MFW_GET_FIELD(p_tbl[i].entry,
210 priority = ffs(priority_map) - 1;
212 DP_ERR(p_hwfn, "Invalid priority\n");
216 tc = QED_DCBX_PRIO2TC(pri_tc_tbl, priority);
217 if (qed_dcbx_get_app_protocol_type(p_hwfn, p_tbl[i].entry,
218 protocol_id, &type)) {
219 /* ETH always have the enable bit reset, as it gets
220 * vlan information per packet. For other protocols,
221 * should be set according to the dcbx_enabled
222 * indication, but we only got here if there was an
223 * app tlv for the protocol, so dcbx must be enabled.
225 enable = !(type == DCBX_PROTOCOL_ETH);
227 qed_dcbx_update_app_info(p_data, p_hwfn, enable, true,
232 /* If RoCE-V2 TLV is not detected, driver need to use RoCE app
233 * data for RoCE-v2 not the default app data.
235 if (!p_data->arr[DCBX_PROTOCOL_ROCE_V2].update &&
236 p_data->arr[DCBX_PROTOCOL_ROCE].update) {
237 tc = p_data->arr[DCBX_PROTOCOL_ROCE].tc;
238 priority = p_data->arr[DCBX_PROTOCOL_ROCE].priority;
239 qed_dcbx_update_app_info(p_data, p_hwfn, true, true,
240 priority, tc, DCBX_PROTOCOL_ROCE_V2);
243 /* Update ramrod protocol data and hw_info fields
244 * with default info when corresponding APP TLV's are not detected.
245 * The enabled field has a different logic for ethernet as only for
246 * ethernet dcb should disabled by default, as the information arrives
247 * from the OS (unless an explicit app tlv was present).
249 tc = p_data->arr[DCBX_PROTOCOL_ETH].tc;
250 priority = p_data->arr[DCBX_PROTOCOL_ETH].priority;
251 for (type = 0; type < DCBX_MAX_PROTOCOL_TYPE; type++) {
252 if (p_data->arr[type].update)
255 enable = (type == DCBX_PROTOCOL_ETH) ? false : dcbx_enabled;
256 qed_dcbx_update_app_info(p_data, p_hwfn, enable, true,
263 /* Parse app TLV's to update TC information in hw_info structure for
264 * reconfiguring QM. Get protocol specific data for PF update ramrod command.
266 static int qed_dcbx_process_mib_info(struct qed_hwfn *p_hwfn)
268 struct dcbx_app_priority_feature *p_app;
269 struct dcbx_app_priority_entry *p_tbl;
270 struct qed_dcbx_results data = { 0 };
271 struct dcbx_ets_feature *p_ets;
272 struct qed_hw_info *p_info;
273 u32 pri_tc_tbl, flags;
278 /* If DCBx version is non zero, then negotiation was
279 * successfuly performed
281 flags = p_hwfn->p_dcbx_info->operational.flags;
282 dcbx_enabled = !!QED_MFW_GET_FIELD(flags, DCBX_CONFIG_VERSION);
284 p_app = &p_hwfn->p_dcbx_info->operational.features.app;
285 p_tbl = p_app->app_pri_tbl;
287 p_ets = &p_hwfn->p_dcbx_info->operational.features.ets;
288 pri_tc_tbl = p_ets->pri_tc_tbl[0];
290 p_info = &p_hwfn->hw_info;
291 num_entries = QED_MFW_GET_FIELD(p_app->flags, DCBX_APP_NUM_ENTRIES);
293 rc = qed_dcbx_process_tlv(p_hwfn, &data, p_tbl, pri_tc_tbl,
294 num_entries, dcbx_enabled);
298 p_info->num_tc = QED_MFW_GET_FIELD(p_ets->flags, DCBX_ETS_MAX_TCS);
299 data.pf_id = p_hwfn->rel_pf_id;
300 data.dcbx_enabled = dcbx_enabled;
302 qed_dcbx_dp_protocol(p_hwfn, &data);
304 memcpy(&p_hwfn->p_dcbx_info->results, &data,
305 sizeof(struct qed_dcbx_results));
311 qed_dcbx_copy_mib(struct qed_hwfn *p_hwfn,
312 struct qed_ptt *p_ptt,
313 struct qed_dcbx_mib_meta_data *p_data,
314 enum qed_mib_read_type type)
316 u32 prefix_seq_num, suffix_seq_num;
320 /* The data is considered to be valid only if both sequence numbers are
324 if (type == QED_DCBX_REMOTE_LLDP_MIB) {
325 qed_memcpy_from(p_hwfn, p_ptt, p_data->lldp_remote,
326 p_data->addr, p_data->size);
327 prefix_seq_num = p_data->lldp_remote->prefix_seq_num;
328 suffix_seq_num = p_data->lldp_remote->suffix_seq_num;
330 qed_memcpy_from(p_hwfn, p_ptt, p_data->mib,
331 p_data->addr, p_data->size);
332 prefix_seq_num = p_data->mib->prefix_seq_num;
333 suffix_seq_num = p_data->mib->suffix_seq_num;
339 "mib type = %d, try count = %d prefix seq num = %d suffix seq num = %d\n",
340 type, read_count, prefix_seq_num, suffix_seq_num);
341 } while ((prefix_seq_num != suffix_seq_num) &&
342 (read_count < QED_DCBX_MAX_MIB_READ_TRY));
344 if (read_count >= QED_DCBX_MAX_MIB_READ_TRY) {
346 "MIB read err, mib type = %d, try count = %d prefix seq num = %d suffix seq num = %d\n",
347 type, read_count, prefix_seq_num, suffix_seq_num);
355 qed_dcbx_read_local_lldp_mib(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
357 struct qed_dcbx_mib_meta_data data;
360 memset(&data, 0, sizeof(data));
361 data.addr = p_hwfn->mcp_info->port_addr + offsetof(struct public_port,
363 data.lldp_local = p_hwfn->p_dcbx_info->lldp_local;
364 data.size = sizeof(struct lldp_config_params_s);
365 qed_memcpy_from(p_hwfn, p_ptt, data.lldp_local, data.addr, data.size);
371 qed_dcbx_read_remote_lldp_mib(struct qed_hwfn *p_hwfn,
372 struct qed_ptt *p_ptt,
373 enum qed_mib_read_type type)
375 struct qed_dcbx_mib_meta_data data;
378 memset(&data, 0, sizeof(data));
379 data.addr = p_hwfn->mcp_info->port_addr + offsetof(struct public_port,
381 data.lldp_remote = p_hwfn->p_dcbx_info->lldp_remote;
382 data.size = sizeof(struct lldp_status_params_s);
383 rc = qed_dcbx_copy_mib(p_hwfn, p_ptt, &data, type);
389 qed_dcbx_read_operational_mib(struct qed_hwfn *p_hwfn,
390 struct qed_ptt *p_ptt,
391 enum qed_mib_read_type type)
393 struct qed_dcbx_mib_meta_data data;
396 memset(&data, 0, sizeof(data));
397 data.addr = p_hwfn->mcp_info->port_addr +
398 offsetof(struct public_port, operational_dcbx_mib);
399 data.mib = &p_hwfn->p_dcbx_info->operational;
400 data.size = sizeof(struct dcbx_mib);
401 rc = qed_dcbx_copy_mib(p_hwfn, p_ptt, &data, type);
407 qed_dcbx_read_remote_mib(struct qed_hwfn *p_hwfn,
408 struct qed_ptt *p_ptt, enum qed_mib_read_type type)
410 struct qed_dcbx_mib_meta_data data;
413 memset(&data, 0, sizeof(data));
414 data.addr = p_hwfn->mcp_info->port_addr +
415 offsetof(struct public_port, remote_dcbx_mib);
416 data.mib = &p_hwfn->p_dcbx_info->remote;
417 data.size = sizeof(struct dcbx_mib);
418 rc = qed_dcbx_copy_mib(p_hwfn, p_ptt, &data, type);
424 qed_dcbx_read_local_mib(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
426 struct qed_dcbx_mib_meta_data data;
429 memset(&data, 0, sizeof(data));
430 data.addr = p_hwfn->mcp_info->port_addr +
431 offsetof(struct public_port, local_admin_dcbx_mib);
432 data.local_admin = &p_hwfn->p_dcbx_info->local_admin;
433 data.size = sizeof(struct dcbx_local_params);
434 qed_memcpy_from(p_hwfn, p_ptt, data.local_admin, data.addr, data.size);
439 static int qed_dcbx_read_mib(struct qed_hwfn *p_hwfn,
440 struct qed_ptt *p_ptt, enum qed_mib_read_type type)
445 case QED_DCBX_OPERATIONAL_MIB:
446 rc = qed_dcbx_read_operational_mib(p_hwfn, p_ptt, type);
448 case QED_DCBX_REMOTE_MIB:
449 rc = qed_dcbx_read_remote_mib(p_hwfn, p_ptt, type);
451 case QED_DCBX_LOCAL_MIB:
452 rc = qed_dcbx_read_local_mib(p_hwfn, p_ptt);
454 case QED_DCBX_REMOTE_LLDP_MIB:
455 rc = qed_dcbx_read_remote_lldp_mib(p_hwfn, p_ptt, type);
457 case QED_DCBX_LOCAL_LLDP_MIB:
458 rc = qed_dcbx_read_local_lldp_mib(p_hwfn, p_ptt);
461 DP_ERR(p_hwfn, "MIB read err, unknown mib type %d\n", type);
468 * Reconfigure QM and invoke PF update ramrod command if operational MIB
469 * change is detected.
472 qed_dcbx_mib_update_event(struct qed_hwfn *p_hwfn,
473 struct qed_ptt *p_ptt, enum qed_mib_read_type type)
477 rc = qed_dcbx_read_mib(p_hwfn, p_ptt, type);
481 if (type == QED_DCBX_OPERATIONAL_MIB) {
482 rc = qed_dcbx_process_mib_info(p_hwfn);
484 /* reconfigure tcs of QM queues according
485 * to negotiation results
487 qed_qm_reconf(p_hwfn, p_ptt);
489 /* update storm FW with negotiation results */
490 qed_sp_pf_update(p_hwfn);
497 int qed_dcbx_info_alloc(struct qed_hwfn *p_hwfn)
501 p_hwfn->p_dcbx_info = kzalloc(sizeof(*p_hwfn->p_dcbx_info), GFP_KERNEL);
502 if (!p_hwfn->p_dcbx_info) {
504 "Failed to allocate 'struct qed_dcbx_info'\n");
511 void qed_dcbx_info_free(struct qed_hwfn *p_hwfn,
512 struct qed_dcbx_info *p_dcbx_info)
514 kfree(p_hwfn->p_dcbx_info);
517 static void qed_dcbx_update_protocol_data(struct protocol_dcb_data *p_data,
518 struct qed_dcbx_results *p_src,
519 enum dcbx_protocol_type type)
521 p_data->dcb_enable_flag = p_src->arr[type].enable;
522 p_data->dcb_priority = p_src->arr[type].priority;
523 p_data->dcb_tc = p_src->arr[type].tc;
526 /* Set pf update ramrod command params */
527 void qed_dcbx_set_pf_update_params(struct qed_dcbx_results *p_src,
528 struct pf_update_ramrod_data *p_dest)
530 struct protocol_dcb_data *p_dcb_data;
531 bool update_flag = false;
533 p_dest->pf_id = p_src->pf_id;
535 update_flag = p_src->arr[DCBX_PROTOCOL_FCOE].update;
536 p_dest->update_fcoe_dcb_data_flag = update_flag;
538 update_flag = p_src->arr[DCBX_PROTOCOL_ROCE].update;
539 p_dest->update_roce_dcb_data_flag = update_flag;
540 update_flag = p_src->arr[DCBX_PROTOCOL_ROCE_V2].update;
541 p_dest->update_roce_dcb_data_flag = update_flag;
543 update_flag = p_src->arr[DCBX_PROTOCOL_ISCSI].update;
544 p_dest->update_iscsi_dcb_data_flag = update_flag;
545 update_flag = p_src->arr[DCBX_PROTOCOL_ETH].update;
546 p_dest->update_eth_dcb_data_flag = update_flag;
548 p_dcb_data = &p_dest->fcoe_dcb_data;
549 qed_dcbx_update_protocol_data(p_dcb_data, p_src, DCBX_PROTOCOL_FCOE);
550 p_dcb_data = &p_dest->roce_dcb_data;
552 if (p_src->arr[DCBX_PROTOCOL_ROCE].update)
553 qed_dcbx_update_protocol_data(p_dcb_data, p_src,
555 if (p_src->arr[DCBX_PROTOCOL_ROCE_V2].update)
556 qed_dcbx_update_protocol_data(p_dcb_data, p_src,
557 DCBX_PROTOCOL_ROCE_V2);
559 p_dcb_data = &p_dest->iscsi_dcb_data;
560 qed_dcbx_update_protocol_data(p_dcb_data, p_src, DCBX_PROTOCOL_ISCSI);
561 p_dcb_data = &p_dest->eth_dcb_data;
562 qed_dcbx_update_protocol_data(p_dcb_data, p_src, DCBX_PROTOCOL_ETH);