1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2001-2018
6 #include "ixgbe_type.h"
8 #include "ixgbe_dcb_82599.h"
11 * ixgbe_dcb_get_tc_stats_82599 - Returns status for each traffic class
12 * @hw: pointer to hardware structure
13 * @stats: pointer to statistics structure
14 * @tc_count: Number of elements in bwg_array.
16 * This function returns the status data for each of the Traffic Classes in use.
18 s32 ixgbe_dcb_get_tc_stats_82599(struct ixgbe_hw *hw,
19 struct ixgbe_hw_stats *stats,
24 DEBUGFUNC("dcb_get_tc_stats");
26 if (tc_count > IXGBE_DCB_MAX_TRAFFIC_CLASS)
27 return IXGBE_ERR_PARAM;
29 /* Statistics pertaining to each traffic class */
30 for (tc = 0; tc < tc_count; tc++) {
31 /* Transmitted Packets */
32 stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc));
33 /* Transmitted Bytes (read low first to prevent missed carry) */
34 stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(tc));
36 (((u64)(IXGBE_READ_REG(hw, IXGBE_QBTC_H(tc)))) << 32);
37 /* Received Packets */
38 stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc));
39 /* Received Bytes (read low first to prevent missed carry) */
40 stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(tc));
42 (((u64)(IXGBE_READ_REG(hw, IXGBE_QBRC_H(tc)))) << 32);
44 /* Received Dropped Packet */
45 stats->qprdc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRDC(tc));
52 * ixgbe_dcb_get_pfc_stats_82599 - Return CBFC status data
53 * @hw: pointer to hardware structure
54 * @stats: pointer to statistics structure
55 * @tc_count: Number of elements in bwg_array.
57 * This function returns the CBFC status data for each of the Traffic Classes.
59 s32 ixgbe_dcb_get_pfc_stats_82599(struct ixgbe_hw *hw,
60 struct ixgbe_hw_stats *stats,
65 DEBUGFUNC("dcb_get_pfc_stats");
67 if (tc_count > IXGBE_DCB_MAX_TRAFFIC_CLASS)
68 return IXGBE_ERR_PARAM;
70 for (tc = 0; tc < tc_count; tc++) {
71 /* Priority XOFF Transmitted */
72 stats->pxofftxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(tc));
73 /* Priority XOFF Received */
74 stats->pxoffrxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(tc));
81 * ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter
82 * @hw: pointer to hardware structure
83 * @refill: refill credits index by traffic class
84 * @max: max credits index by traffic class
85 * @bwg_id: bandwidth grouping indexed by traffic class
86 * @tsa: transmission selection algorithm indexed by traffic class
87 * @map: priority to tc assignments indexed by priority
89 * Configure Rx Packet Arbiter and credits for each traffic class.
91 s32 ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw, u16 *refill,
92 u16 *max, u8 *bwg_id, u8 *tsa,
96 u32 credit_refill = 0;
101 * Disable the arbiter before changing parameters
102 * (always enable recycle mode; WSP)
104 reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC | IXGBE_RTRPCS_ARBDIS;
105 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
108 * map all UPs to TCs. up_to_tc_bitmap for each TC has corresponding
109 * bits sets for the UPs that needs to be mappped to that TC.
110 * e.g if priorities 6 and 7 are to be mapped to a TC then the
111 * up_to_tc_bitmap value for that TC will be 11000000 in binary.
114 for (i = 0; i < IXGBE_DCB_MAX_USER_PRIORITY; i++)
115 reg |= (map[i] << (i * IXGBE_RTRUP2TC_UP_SHIFT));
117 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
119 /* Configure traffic class credits and priority */
120 for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) {
121 credit_refill = refill[i];
123 reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT);
125 reg |= (u32)(bwg_id[i]) << IXGBE_RTRPT4C_BWG_SHIFT;
127 if (tsa[i] == ixgbe_dcb_tsa_strict)
128 reg |= IXGBE_RTRPT4C_LSP;
130 IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg);
134 * Configure Rx packet plane (recycle mode; WSP) and
137 reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC;
138 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
140 return IXGBE_SUCCESS;
144 * ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter
145 * @hw: pointer to hardware structure
146 * @refill: refill credits index by traffic class
147 * @max: max credits index by traffic class
148 * @bwg_id: bandwidth grouping indexed by traffic class
149 * @tsa: transmission selection algorithm indexed by traffic class
151 * Configure Tx Descriptor Arbiter and credits for each traffic class.
153 s32 ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw, u16 *refill,
154 u16 *max, u8 *bwg_id, u8 *tsa)
156 u32 reg, max_credits;
159 /* Clear the per-Tx queue credits; we use per-TC instead */
160 for (i = 0; i < 128; i++) {
161 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
162 IXGBE_WRITE_REG(hw, IXGBE_RTTDT1C, 0);
165 /* Configure traffic class credits and priority */
166 for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) {
167 max_credits = max[i];
168 reg = max_credits << IXGBE_RTTDT2C_MCL_SHIFT;
170 reg |= (u32)(bwg_id[i]) << IXGBE_RTTDT2C_BWG_SHIFT;
172 if (tsa[i] == ixgbe_dcb_tsa_group_strict_cee)
173 reg |= IXGBE_RTTDT2C_GSP;
175 if (tsa[i] == ixgbe_dcb_tsa_strict)
176 reg |= IXGBE_RTTDT2C_LSP;
178 IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg);
182 * Configure Tx descriptor plane (recycle mode; WSP) and
185 reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM;
186 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
188 return IXGBE_SUCCESS;
192 * ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter
193 * @hw: pointer to hardware structure
194 * @refill: refill credits index by traffic class
195 * @max: max credits index by traffic class
196 * @bwg_id: bandwidth grouping indexed by traffic class
197 * @tsa: transmission selection algorithm indexed by traffic class
198 * @map: priority to tc assignments indexed by priority
200 * Configure Tx Packet Arbiter and credits for each traffic class.
202 s32 ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw, u16 *refill,
203 u16 *max, u8 *bwg_id, u8 *tsa,
210 * Disable the arbiter before changing parameters
211 * (always enable recycle mode; SP; arb delay)
213 reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
214 (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT) |
216 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
219 * map all UPs to TCs. up_to_tc_bitmap for each TC has corresponding
220 * bits sets for the UPs that needs to be mappped to that TC.
221 * e.g if priorities 6 and 7 are to be mapped to a TC then the
222 * up_to_tc_bitmap value for that TC will be 11000000 in binary.
225 for (i = 0; i < IXGBE_DCB_MAX_USER_PRIORITY; i++)
226 reg |= (map[i] << (i * IXGBE_RTTUP2TC_UP_SHIFT));
228 IXGBE_WRITE_REG(hw, IXGBE_RTTUP2TC, reg);
230 /* Configure traffic class credits and priority */
231 for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) {
233 reg |= (u32)(max[i]) << IXGBE_RTTPT2C_MCL_SHIFT;
234 reg |= (u32)(bwg_id[i]) << IXGBE_RTTPT2C_BWG_SHIFT;
236 if (tsa[i] == ixgbe_dcb_tsa_group_strict_cee)
237 reg |= IXGBE_RTTPT2C_GSP;
239 if (tsa[i] == ixgbe_dcb_tsa_strict)
240 reg |= IXGBE_RTTPT2C_LSP;
242 IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg);
246 * Configure Tx packet plane (recycle mode; SP; arb delay) and
249 reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
250 (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT);
251 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
253 return IXGBE_SUCCESS;
257 * ixgbe_dcb_config_pfc_82599 - Configure priority flow control
258 * @hw: pointer to hardware structure
259 * @pfc_en: enabled pfc bitmask
260 * @map: priority to tc assignments indexed by priority
262 * Configure Priority Flow Control (PFC) for each traffic class.
264 s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en, u8 *map)
266 u32 i, j, fcrtl, reg;
269 /* Enable Transmit Priority Flow Control */
270 IXGBE_WRITE_REG(hw, IXGBE_FCCFG, IXGBE_FCCFG_TFCE_PRIORITY);
272 /* Enable Receive Priority Flow Control */
273 reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
274 reg |= IXGBE_MFLCN_DPF;
277 * X540 supports per TC Rx priority flow control. So
278 * clear all TCs and only enable those that should be
281 reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
283 if (hw->mac.type >= ixgbe_mac_X540)
284 reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
287 reg |= IXGBE_MFLCN_RPFCE;
289 IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
291 for (i = 0; i < IXGBE_DCB_MAX_USER_PRIORITY; i++) {
297 /* Configure PFC Tx thresholds per TC */
298 for (i = 0; i <= max_tc; i++) {
301 for (j = 0; j < IXGBE_DCB_MAX_USER_PRIORITY; j++) {
302 if ((map[j] == i) && (pfc_en & (1 << j))) {
309 reg = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
310 fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE;
311 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
314 * In order to prevent Tx hangs when the internal Tx
315 * switch is enabled we must set the high water mark
316 * to the Rx packet buffer size - 24KB. This allows
317 * the Tx switch to function even under heavy Rx
320 reg = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 24576;
321 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
324 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
327 for (; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) {
328 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
329 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
332 /* Configure pause time (2 TCs per register) */
333 reg = hw->fc.pause_time | (hw->fc.pause_time << 16);
334 for (i = 0; i < (IXGBE_DCB_MAX_TRAFFIC_CLASS / 2); i++)
335 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
337 /* Configure flow control refresh threshold value */
338 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
340 return IXGBE_SUCCESS;
344 * ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics
345 * @hw: pointer to hardware structure
346 * @dcb_config: pointer to ixgbe_dcb_config structure
348 * Configure queue statistics registers, all queues belonging to same traffic
349 * class uses a single set of queue statistics counters.
351 s32 ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw,
352 struct ixgbe_dcb_config *dcb_config)
357 bool vt_mode = false;
359 if (dcb_config != NULL) {
360 tc_count = dcb_config->num_tcs.pg_tcs;
361 vt_mode = dcb_config->vt_mode;
364 if (!((tc_count == 8 && vt_mode == false) || tc_count == 4))
365 return IXGBE_ERR_PARAM;
367 if (tc_count == 8 && vt_mode == false) {
369 * Receive Queues stats setting
370 * 32 RQSMR registers, each configuring 4 queues.
372 * Set all 16 queues of each TC to the same stat
373 * with TC 'n' going to stat 'n'.
375 for (i = 0; i < 32; i++) {
376 reg = 0x01010101 * (i / 4);
377 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
380 * Transmit Queues stats setting
381 * 32 TQSM registers, each controlling 4 queues.
383 * Set all queues of each TC to the same stat
384 * with TC 'n' going to stat 'n'.
385 * Tx queues are allocated non-uniformly to TCs:
386 * 32, 32, 16, 16, 8, 8, 8, 8.
388 for (i = 0; i < 32; i++) {
405 IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
407 } else if (tc_count == 4 && vt_mode == false) {
409 * Receive Queues stats setting
410 * 32 RQSMR registers, each configuring 4 queues.
412 * Set all 16 queues of each TC to the same stat
413 * with TC 'n' going to stat 'n'.
415 for (i = 0; i < 32; i++) {
417 /* In 4 TC mode, odd 16-queue ranges are
421 reg = 0x01010101 * (i / 8);
422 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
425 * Transmit Queues stats setting
426 * 32 TQSM registers, each controlling 4 queues.
428 * Set all queues of each TC to the same stat
429 * with TC 'n' going to stat 'n'.
430 * Tx queues are allocated non-uniformly to TCs:
433 for (i = 0; i < 32; i++) {
442 IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
444 } else if (tc_count == 4 && vt_mode == true) {
446 * Receive Queues stats setting
447 * 32 RQSMR registers, each configuring 4 queues.
449 * Queue Indexing in 32 VF with DCB mode maps 4 TC's to each
450 * pool. Set all 32 queues of each TC across pools to the same
451 * stat with TC 'n' going to stat 'n'.
453 for (i = 0; i < 32; i++)
454 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), 0x03020100);
456 * Transmit Queues stats setting
457 * 32 TQSM registers, each controlling 4 queues.
459 * Queue Indexing in 32 VF with DCB mode maps 4 TC's to each
460 * pool. Set all 32 queues of each TC across pools to the same
461 * stat with TC 'n' going to stat 'n'.
463 for (i = 0; i < 32; i++)
464 IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), 0x03020100);
467 return IXGBE_SUCCESS;
471 * ixgbe_dcb_config_82599 - Configure general DCB parameters
472 * @hw: pointer to hardware structure
473 * @dcb_config: pointer to ixgbe_dcb_config structure
475 * Configure general DCB parameters.
477 s32 ixgbe_dcb_config_82599(struct ixgbe_hw *hw,
478 struct ixgbe_dcb_config *dcb_config)
483 /* Disable the Tx desc arbiter so that MTQC can be changed */
484 reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
485 reg |= IXGBE_RTTDCS_ARBDIS;
486 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
488 reg = IXGBE_READ_REG(hw, IXGBE_MRQC);
489 if (dcb_config->num_tcs.pg_tcs == 8) {
490 /* Enable DCB for Rx with 8 TCs */
491 switch (reg & IXGBE_MRQC_MRQE_MASK) {
493 case IXGBE_MRQC_RT4TCEN:
494 /* RSS disabled cases */
495 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) |
498 case IXGBE_MRQC_RSSEN:
499 case IXGBE_MRQC_RTRSS4TCEN:
500 /* RSS enabled cases */
501 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) |
502 IXGBE_MRQC_RTRSS8TCEN;
506 * Unsupported value, assume stale data,
510 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) |
514 if (dcb_config->num_tcs.pg_tcs == 4) {
515 /* We support both VT-on and VT-off with 4 TCs. */
516 if (dcb_config->vt_mode)
517 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) |
518 IXGBE_MRQC_VMDQRT4TCEN;
520 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) |
521 IXGBE_MRQC_RTRSS4TCEN;
523 IXGBE_WRITE_REG(hw, IXGBE_MRQC, reg);
525 /* Enable DCB for Tx with 8 TCs */
526 if (dcb_config->num_tcs.pg_tcs == 8)
527 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
529 /* We support both VT-on and VT-off with 4 TCs. */
530 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
531 if (dcb_config->vt_mode)
532 reg |= IXGBE_MTQC_VT_ENA;
534 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
536 /* Disable drop for all queues */
537 for (q = 0; q < 128; q++)
538 IXGBE_WRITE_REG(hw, IXGBE_QDE,
539 (IXGBE_QDE_WRITE | (q << IXGBE_QDE_IDX_SHIFT)));
541 /* Enable the Tx desc arbiter */
542 reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
543 reg &= ~IXGBE_RTTDCS_ARBDIS;
544 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
546 /* Enable Security TX Buffer IFG for DCB */
547 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
548 reg |= IXGBE_SECTX_DCB;
549 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);
551 return IXGBE_SUCCESS;
555 * ixgbe_dcb_hw_config_82599 - Configure and enable DCB
556 * @hw: pointer to hardware structure
557 * @link_speed: unused
558 * @refill: refill credits index by traffic class
559 * @max: max credits index by traffic class
560 * @bwg_id: bandwidth grouping indexed by traffic class
561 * @tsa: transmission selection algorithm indexed by traffic class
562 * @map: priority to tc assignments indexed by priority
564 * Configure dcb settings and enable dcb mode.
566 s32 ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw, int link_speed,
567 u16 *refill, u16 *max, u8 *bwg_id, u8 *tsa,
570 UNREFERENCED_1PARAMETER(link_speed);
572 ixgbe_dcb_config_rx_arbiter_82599(hw, refill, max, bwg_id, tsa,
574 ixgbe_dcb_config_tx_desc_arbiter_82599(hw, refill, max, bwg_id,
576 ixgbe_dcb_config_tx_data_arbiter_82599(hw, refill, max, bwg_id,
579 return IXGBE_SUCCESS;