1 /* $NetBSD: ixgbe_dcb_82598.c,v 1.13 2023/10/06 14:48:08 msaitoh Exp $ */ 2 /****************************************************************************** 3 SPDX-License-Identifier: BSD-3-Clause 4 5 Copyright (c) 2001-2020, Intel Corporation 6 All rights reserved. 7 8 Redistribution and use in source and binary forms, with or without 9 modification, are permitted provided that the following conditions are met: 10 11 1. Redistributions of source code must retain the above copyright notice, 12 this list of conditions and the following disclaimer. 13 14 2. Redistributions in binary form must reproduce the above copyright 15 notice, this list of conditions and the following disclaimer in the 16 documentation and/or other materials provided with the distribution. 17 18 3. Neither the name of the Intel Corporation nor the names of its 19 contributors may be used to endorse or promote products derived from 20 this software without specific prior written permission. 21 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 23 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 POSSIBILITY OF SUCH DAMAGE. 33 34 ******************************************************************************/ 35 /*$FreeBSD: head/sys/dev/ixgbe/ixgbe_dcb_82598.c 331224 2018-03-19 20:55:05Z erj $*/ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: ixgbe_dcb_82598.c,v 1.13 2023/10/06 14:48:08 msaitoh Exp $"); 39 40 #include "ixgbe_type.h" 41 #include "ixgbe_dcb.h" 42 #include "ixgbe_dcb_82598.h" 43 44 /** 45 * ixgbe_dcb_get_tc_stats_82598 - Return status data for each traffic class 46 * @hw: pointer to hardware structure 47 * @stats: pointer to statistics structure 48 * @tc_count: Number of elements in bwg_array. 49 * 50 * This function returns the status data for each of the Traffic Classes in use. 51 */ 52 s32 ixgbe_dcb_get_tc_stats_82598(struct ixgbe_hw *hw, 53 struct ixgbe_hw_stats *stats, 54 u8 tc_count) 55 { 56 int tc; 57 58 DEBUGFUNC("dcb_get_tc_stats"); 59 60 if (tc_count > IXGBE_DCB_MAX_TRAFFIC_CLASS) 61 return IXGBE_ERR_PARAM; 62 63 /* Statistics pertaining to each traffic class */ 64 for (tc = 0; tc < tc_count; tc++) { 65 /* Transmitted Packets */ 66 stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc)); 67 /* Transmitted Bytes */ 68 stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC(tc)); 69 /* Received Packets */ 70 stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc)); 71 /* Received Bytes */ 72 stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc)); 73 } 74 75 return IXGBE_SUCCESS; 76 } 77 78 /** 79 * ixgbe_dcb_get_pfc_stats_82598 - Returns CBFC status data 80 * @hw: pointer to hardware structure 81 * @stats: pointer to statistics structure 82 * @tc_count: Number of elements in bwg_array. 83 * 84 * This function returns the CBFC status data for each of the Traffic Classes. 85 */ 86 s32 ixgbe_dcb_get_pfc_stats_82598(struct ixgbe_hw *hw, 87 struct ixgbe_hw_stats *stats, 88 u8 tc_count) 89 { 90 int tc; 91 92 DEBUGFUNC("dcb_get_pfc_stats"); 93 94 if (tc_count > IXGBE_DCB_MAX_TRAFFIC_CLASS) 95 return IXGBE_ERR_PARAM; 96 97 for (tc = 0; tc < tc_count; tc++) { 98 /* Priority XOFF Transmitted */ 99 stats->pxofftxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(tc)); 100 /* Priority XOFF Received */ 101 stats->pxoffrxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(tc)); 102 } 103 104 return IXGBE_SUCCESS; 105 } 106 107 /** 108 * ixgbe_dcb_config_rx_arbiter_82598 - Config Rx data arbiter 109 * @hw: pointer to hardware structure 110 * @refill: refill credits index by traffic class 111 * @max: max credits index by traffic class 112 * @tsa: transmission selection algorithm indexed by traffic class 113 * 114 * Configure Rx Data Arbiter and credits for each traffic class. 115 */ 116 s32 ixgbe_dcb_config_rx_arbiter_82598(struct ixgbe_hw *hw, u16 *refill, 117 u16 *max, u8 *tsa) 118 { 119 u32 reg = 0; 120 u32 credit_refill = 0; 121 u32 credit_max = 0; 122 u8 i = 0; 123 124 reg = IXGBE_READ_REG(hw, IXGBE_RUPPBMR) | IXGBE_RUPPBMR_MQA; 125 IXGBE_WRITE_REG(hw, IXGBE_RUPPBMR, reg); 126 127 reg = IXGBE_READ_REG(hw, IXGBE_RMCS); 128 /* Enable Arbiter */ 129 reg &= ~IXGBE_RMCS_ARBDIS; 130 /* Enable Receive Recycle within the BWG */ 131 reg |= IXGBE_RMCS_RRM; 132 /* Enable Deficit Fixed Priority arbitration*/ 133 reg |= IXGBE_RMCS_DFP; 134 135 IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg); 136 137 /* Configure traffic class credits and priority */ 138 for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) { 139 credit_refill = refill[i]; 140 credit_max = max[i]; 141 142 reg = credit_refill | (credit_max << IXGBE_RT2CR_MCL_SHIFT); 143 144 if (tsa[i] == ixgbe_dcb_tsa_strict) 145 reg |= IXGBE_RT2CR_LSP; 146 147 IXGBE_WRITE_REG(hw, IXGBE_RT2CR(i), reg); 148 } 149 150 reg = IXGBE_READ_REG(hw, IXGBE_RDRXCTL); 151 reg |= IXGBE_RDRXCTL_RDMTS_1_2; 152 reg |= IXGBE_RDRXCTL_MPBEN; 153 reg |= IXGBE_RDRXCTL_MCEN; 154 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, reg); 155 156 reg = IXGBE_READ_REG(hw, IXGBE_RXCTRL); 157 /* Make sure there is enough descriptors before arbitration */ 158 reg &= ~IXGBE_RXCTRL_DMBYPS; 159 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, reg); 160 161 return IXGBE_SUCCESS; 162 } 163 164 /** 165 * ixgbe_dcb_config_tx_desc_arbiter_82598 - Config Tx Desc. arbiter 166 * @hw: pointer to hardware structure 167 * @refill: refill credits index by traffic class 168 * @max: max credits index by traffic class 169 * @bwg_id: bandwidth grouping indexed by traffic class 170 * @tsa: transmission selection algorithm indexed by traffic class 171 * 172 * Configure Tx Descriptor Arbiter and credits for each traffic class. 173 */ 174 s32 ixgbe_dcb_config_tx_desc_arbiter_82598(struct ixgbe_hw *hw, 175 u16 *refill, u16 *max, u8 *bwg_id, 176 u8 *tsa) 177 { 178 u32 reg, max_credits; 179 u8 i; 180 181 reg = IXGBE_READ_REG(hw, IXGBE_DPMCS); 182 183 /* Enable arbiter */ 184 reg &= ~IXGBE_DPMCS_ARBDIS; 185 reg |= IXGBE_DPMCS_TSOEF; 186 187 /* Configure Max TSO packet size 34KB including payload and headers */ 188 reg |= (0x4 << IXGBE_DPMCS_MTSOS_SHIFT); 189 190 IXGBE_WRITE_REG(hw, IXGBE_DPMCS, reg); 191 192 /* Configure traffic class credits and priority */ 193 for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) { 194 max_credits = max[i]; 195 reg = max_credits << IXGBE_TDTQ2TCCR_MCL_SHIFT; 196 reg |= (u32)(refill[i]); 197 reg |= (u32)(bwg_id[i]) << IXGBE_TDTQ2TCCR_BWG_SHIFT; 198 199 if (tsa[i] == ixgbe_dcb_tsa_group_strict_cee) 200 reg |= IXGBE_TDTQ2TCCR_GSP; 201 202 if (tsa[i] == ixgbe_dcb_tsa_strict) 203 reg |= IXGBE_TDTQ2TCCR_LSP; 204 205 IXGBE_WRITE_REG(hw, IXGBE_TDTQ2TCCR(i), reg); 206 } 207 208 return IXGBE_SUCCESS; 209 } 210 211 /** 212 * ixgbe_dcb_config_tx_data_arbiter_82598 - Config Tx data arbiter 213 * @hw: pointer to hardware structure 214 * @refill: refill credits index by traffic class 215 * @max: max credits index by traffic class 216 * @bwg_id: bandwidth grouping indexed by traffic class 217 * @tsa: transmission selection algorithm indexed by traffic class 218 * 219 * Configure Tx Data Arbiter and credits for each traffic class. 220 */ 221 s32 ixgbe_dcb_config_tx_data_arbiter_82598(struct ixgbe_hw *hw, 222 u16 *refill, u16 *max, u8 *bwg_id, 223 u8 *tsa) 224 { 225 u32 reg; 226 u8 i; 227 228 reg = IXGBE_READ_REG(hw, IXGBE_PDPMCS); 229 /* Enable Data Plane Arbiter */ 230 reg &= ~IXGBE_PDPMCS_ARBDIS; 231 /* Enable DFP and Transmit Recycle Mode */ 232 reg |= (IXGBE_PDPMCS_TPPAC | IXGBE_PDPMCS_TRM); 233 234 IXGBE_WRITE_REG(hw, IXGBE_PDPMCS, reg); 235 236 /* Configure traffic class credits and priority */ 237 for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) { 238 reg = refill[i]; 239 reg |= (u32)(max[i]) << IXGBE_TDPT2TCCR_MCL_SHIFT; 240 reg |= (u32)(bwg_id[i]) << IXGBE_TDPT2TCCR_BWG_SHIFT; 241 242 if (tsa[i] == ixgbe_dcb_tsa_group_strict_cee) 243 reg |= IXGBE_TDPT2TCCR_GSP; 244 245 if (tsa[i] == ixgbe_dcb_tsa_strict) 246 reg |= IXGBE_TDPT2TCCR_LSP; 247 248 IXGBE_WRITE_REG(hw, IXGBE_TDPT2TCCR(i), reg); 249 } 250 251 /* Enable Tx packet buffer division */ 252 reg = IXGBE_READ_REG(hw, IXGBE_DTXCTL); 253 reg |= IXGBE_DTXCTL_ENDBUBD; 254 IXGBE_WRITE_REG(hw, IXGBE_DTXCTL, reg); 255 256 return IXGBE_SUCCESS; 257 } 258 259 /** 260 * ixgbe_dcb_config_pfc_82598 - Config priority flow control 261 * @hw: pointer to hardware structure 262 * @pfc_en: enabled pfc bitmask 263 * 264 * Configure Priority Flow Control for each traffic class. 265 */ 266 s32 ixgbe_dcb_config_pfc_82598(struct ixgbe_hw *hw, u8 pfc_en) 267 { 268 u32 fcrtl, reg; 269 u8 i; 270 271 /* Enable Transmit Priority Flow Control */ 272 reg = IXGBE_READ_REG(hw, IXGBE_RMCS); 273 reg &= ~IXGBE_RMCS_TFCE_802_3X; 274 reg |= IXGBE_RMCS_TFCE_PRIORITY; 275 IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg); 276 277 /* Enable Receive Priority Flow Control */ 278 reg = IXGBE_READ_REG(hw, IXGBE_FCTRL); 279 reg &= ~(IXGBE_FCTRL_RPFCE | IXGBE_FCTRL_RFCE); 280 281 if (pfc_en) 282 reg |= IXGBE_FCTRL_RPFCE; 283 284 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, reg); 285 286 /* Configure PFC Tx thresholds per TC */ 287 for (i = 0; i < IXGBE_DCB_MAX_TRAFFIC_CLASS; i++) { 288 if (!(pfc_en & (1 << i))) { 289 IXGBE_WRITE_REG(hw, IXGBE_FCRTL(i), 0); 290 IXGBE_WRITE_REG(hw, IXGBE_FCRTH(i), 0); 291 continue; 292 } 293 294 fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE; 295 reg = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN; 296 IXGBE_WRITE_REG(hw, IXGBE_FCRTL(i), fcrtl); 297 IXGBE_WRITE_REG(hw, IXGBE_FCRTH(i), reg); 298 } 299 300 /* Configure pause time */ 301 reg = hw->fc.pause_time | (hw->fc.pause_time << 16); 302 for (i = 0; i < (IXGBE_DCB_MAX_TRAFFIC_CLASS / 2); i++) 303 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg); 304 305 /* Configure flow control refresh threshold value */ 306 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2); 307 308 return IXGBE_SUCCESS; 309 } 310 311 /** 312 * ixgbe_dcb_config_tc_stats_82598 - Configure traffic class statistics 313 * @hw: pointer to hardware structure 314 * 315 * Configure queue statistics registers, all queues belonging to same traffic 316 * class uses a single set of queue statistics counters. 317 */ 318 s32 ixgbe_dcb_config_tc_stats_82598(struct ixgbe_hw *hw) 319 { 320 u32 reg = 0; 321 u8 i = 0; 322 u8 j = 0; 323 324 /* Receive Queues stats setting - 8 queues per statistics reg */ 325 for (i = 0, j = 0; i < 15 && j < 8; i = i + 2, j++) { 326 reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i)); 327 reg |= ((0x1010101) * j); 328 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg); 329 reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i + 1)); 330 reg |= ((0x1010101) * j); 331 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i + 1), reg); 332 } 333 /* Transmit Queues stats setting - 4 queues per statistics reg*/ 334 for (i = 0; i < 8; i++) { 335 reg = IXGBE_READ_REG(hw, IXGBE_TQSMR(i)); 336 reg |= ((0x1010101) * i); 337 IXGBE_WRITE_REG(hw, IXGBE_TQSMR(i), reg); 338 } 339 340 return IXGBE_SUCCESS; 341 } 342 343 /** 344 * ixgbe_dcb_hw_config_82598 - Config and enable DCB 345 * @hw: pointer to hardware structure 346 * @link_speed: unused 347 * @refill: refill credits index by traffic class 348 * @max: max credits index by traffic class 349 * @bwg_id: bandwidth grouping indexed by traffic class 350 * @tsa: transmission selection algorithm indexed by traffic class 351 * 352 * Configure dcb settings and enable dcb mode. 353 */ 354 s32 ixgbe_dcb_hw_config_82598(struct ixgbe_hw *hw, int link_speed, 355 u16 *refill, u16 *max, u8 *bwg_id, 356 u8 *tsa) 357 { 358 UNREFERENCED_1PARAMETER(link_speed); 359 360 ixgbe_dcb_config_rx_arbiter_82598(hw, refill, max, tsa); 361 ixgbe_dcb_config_tx_desc_arbiter_82598(hw, refill, max, bwg_id, 362 tsa); 363 ixgbe_dcb_config_tx_data_arbiter_82598(hw, refill, max, bwg_id, 364 tsa); 365 ixgbe_dcb_config_tc_stats_82598(hw); 366 367 return IXGBE_SUCCESS; 368 } 369
Indexes created Mon Sep 29 03:10:08 GMT 2025