diff options
Diffstat (limited to 'src/vnet/policer/xlate.c')
| -rw-r--r-- | src/vnet/policer/xlate.c | 1505 |
1 files changed, 1505 insertions, 0 deletions
diff --git a/src/vnet/policer/xlate.c b/src/vnet/policer/xlate.c new file mode 100644 index 00000000..74a6eb23 --- /dev/null +++ b/src/vnet/policer/xlate.c @@ -0,0 +1,1505 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include <string.h> +#include <stddef.h> +#include <stdio.h> +#include <assert.h> +#include <math.h> +#include <stdint.h> + +#include <vlib/vlib.h> +#include <vnet/vnet.h> + +#include <vnet/policer/xlate.h> +#include <vnet/policer/police.h> + +#define INTERNAL_SS 1 + +/* debugs */ +#define SSE2_QOS_DEBUG_ERROR(msg, args...) \ + fformat(stderr, msg "\n", ##args); + +#define SSE2_QOS_DEBUG_INFO(msg, args...) \ + fformat(stderr, msg "\n", ##args); + + +#define SSE2_QOS_TR_ERR(TpParms...) +// { +// } + +#define SSE2_QOS_TR_INFO(TpParms...) + +#ifndef MIN +#define MIN(x,y) (((x)<(y))?(x):(y)) +#endif + +#ifndef MAX +#define MAX(x,y) (((x)>(y))?(x):(y)) +#endif + +#define IPE_POLICER_FULL_WRITE_REQUEST_M40AH_OFFSET 0 +#define IPE_POLICER_FULL_WRITE_REQUEST_M40AH_MASK 8 +#define IPE_POLICER_FULL_WRITE_REQUEST_M40AH_SHIFT 24 + +#define IPE_POLICER_FULL_WRITE_REQUEST_TYPE_OFFSET 2 +#define IPE_POLICER_FULL_WRITE_REQUEST_TYPE_MASK 2 +#define IPE_POLICER_FULL_WRITE_REQUEST_TYPE_SHIFT 10 + +#define IPE_POLICER_FULL_WRITE_REQUEST_CMD_OFFSET 3 +#define IPE_POLICER_FULL_WRITE_REQUEST_CMD_MASK 2 +#define IPE_POLICER_FULL_WRITE_REQUEST_CMD_SHIFT 0 + +#define IPE_POLICER_FULL_WRITE_REQUEST_M40AL_OFFSET 4 +#define IPE_POLICER_FULL_WRITE_REQUEST_M40AL_MASK 32 +#define IPE_POLICER_FULL_WRITE_REQUEST_M40AL_SHIFT 0 + +#define IPE_POLICER_FULL_WRITE_REQUEST_RFC_OFFSET 8 +#define IPE_POLICER_FULL_WRITE_REQUEST_RFC_MASK 2 +#define IPE_POLICER_FULL_WRITE_REQUEST_RFC_SHIFT 30 + +#define IPE_POLICER_FULL_WRITE_REQUEST_AN_OFFSET 8 +#define IPE_POLICER_FULL_WRITE_REQUEST_AN_MASK 1 +#define IPE_POLICER_FULL_WRITE_REQUEST_AN_SHIFT 29 + +#define IPE_POLICER_FULL_WRITE_REQUEST_REXP_OFFSET 8 +#define IPE_POLICER_FULL_WRITE_REQUEST_REXP_MASK 4 +#define IPE_POLICER_FULL_WRITE_REQUEST_REXP_SHIFT 22 + +#define IPE_POLICER_FULL_WRITE_REQUEST_ARM_OFFSET 9 +#define IPE_POLICER_FULL_WRITE_REQUEST_ARM_MASK 11 +#define IPE_POLICER_FULL_WRITE_REQUEST_ARM_SHIFT 11 + +#define IPE_POLICER_FULL_WRITE_REQUEST_PRM_OFFSET 10 +#define IPE_POLICER_FULL_WRITE_REQUEST_PRM_MASK 11 +#define IPE_POLICER_FULL_WRITE_REQUEST_PRM_SHIFT 0 + +#define IPE_POLICER_FULL_WRITE_REQUEST_CBLE_OFFSET 12 +#define IPE_POLICER_FULL_WRITE_REQUEST_CBLE_MASK 5 +#define IPE_POLICER_FULL_WRITE_REQUEST_CBLE_SHIFT 27 + +#define IPE_POLICER_FULL_WRITE_REQUEST_CBLM_OFFSET 12 +#define IPE_POLICER_FULL_WRITE_REQUEST_CBLM_MASK 7 +#define IPE_POLICER_FULL_WRITE_REQUEST_CBLM_SHIFT 20 + +#define IPE_POLICER_FULL_WRITE_REQUEST_EBLE_OFFSET 13 +#define IPE_POLICER_FULL_WRITE_REQUEST_EBLE_MASK 5 +#define IPE_POLICER_FULL_WRITE_REQUEST_EBLE_SHIFT 15 + +#define IPE_POLICER_FULL_WRITE_REQUEST_EBLM_OFFSET 14 +#define IPE_POLICER_FULL_WRITE_REQUEST_EBLM_MASK 7 +#define IPE_POLICER_FULL_WRITE_REQUEST_EBLM_SHIFT 8 + +#define IPE_POLICER_FULL_WRITE_REQUEST_CB_OFFSET 16 +#define IPE_POLICER_FULL_WRITE_REQUEST_CB_MASK 31 +#define IPE_POLICER_FULL_WRITE_REQUEST_CB_SHIFT 0 + +#define IPE_POLICER_FULL_WRITE_REQUEST_EB_OFFSET 20 +#define IPE_POLICER_FULL_WRITE_REQUEST_EB_MASK 31 +#define IPE_POLICER_FULL_WRITE_REQUEST_EB_SHIFT 0 + +#define IPE_RFC_RFC2697 0x00000000 +#define IPE_RFC_RFC2698 0x00000001 +#define IPE_RFC_RFC4115 0x00000002 +#define IPE_RFC_MEF5CF1 0x00000003 + +/* End of constants copied from sse_ipe_desc_fmt.h */ + +/* Misc Policer specific definitions */ +#define SSE2_QOS_POLICER_FIXED_PKT_SIZE 256 + +// TODO check what can be provided by hw macro based on ASIC +#define SSE2_QOS_POL_TICKS_PER_SEC 1000LL /* 1 tick = 1 ms */ + +/* + * Default burst, in ms (byte format) + */ +#define SSE2_QOS_POL_DEF_BURST_BYTE 100 + +/* + * Minimum burst needs to be such that the largest packet size is accomodated + */ +// Do we need to get it from some lib? +#define SSE2_QOS_POL_MIN_BURST_BYTE 9*1024 + + +/* + * Flag to indicate if AN is employed or not + * 1 - TRUE, 0 - FALSE + */ +#define SSE2_QOS_POL_ALLOW_NEGATIVE 1 + +// Various Macros to take care of policer calculations + +#define SSE2_QOS_POL_COMM_BKT_MAX \ + (1<<IPE_POLICER_FULL_WRITE_REQUEST_CB_MASK) +#define SSE2_QOS_POL_EXTD_BKT_MAX \ + (1<<IPE_POLICER_FULL_WRITE_REQUEST_EB_MASK) + +#define SSE2_QOS_POL_RATE_EXP_SIZE \ + (IPE_POLICER_FULL_WRITE_REQUEST_REXP_MASK) +#define SSE2_QOS_POL_RATE_EXP_MAX ((1<<SSE2_QOS_POL_RATE_EXP_SIZE) - 1) +#define SSE2_QOS_POL_AVG_RATE_MANT_SIZE \ + (IPE_POLICER_FULL_WRITE_REQUEST_ARM_MASK) +#define SSE2_QOS_POL_AVG_RATE_MANT_MAX \ + ((1<< SSE2_QOS_POL_AVG_RATE_MANT_SIZE) - 1) +#define SSE2_QOS_POL_AVG_RATE_MAX \ + (SSE2_QOS_POL_AVG_RATE_MANT_MAX << \ + SSE2_QOS_POL_RATE_EXP_MAX) + +#define SSE2_QOS_POL_PEAK_RATE_MANT_SIZE \ + (IPE_POLICER_FULL_WRITE_REQUEST_PRM_MASK) +#define SSE2_QOS_POL_PEAK_RATE_MANT_MAX \ + ((1<<SSE2_QOS_POL_PEAK_RATE_MANT_SIZE) - 1) +#define SSE2_QOS_POL_PEAK_RATE_MAX \ + (SSE2_QOS_POL_PEAK_RATE_MANT_MAX << \ + SSE2_QOS_POL_RATE_EXP_MAX) + +#define SSE2_QOS_POL_COMM_BKT_LIMIT_MANT_SIZE \ + (IPE_POLICER_FULL_WRITE_REQUEST_CBLM_MASK) +#define SSE2_QOS_POL_COMM_BKT_LIMIT_MANT_MAX \ + ((1<<SSE2_QOS_POL_COMM_BKT_LIMIT_MANT_SIZE) - 1) +#define SSE2_QOS_POL_COMM_BKT_LIMIT_EXP_SIZE \ + (IPE_POLICER_FULL_WRITE_REQUEST_CBLE_MASK) +#define SSE2_QOS_POL_COMM_BKT_LIMIT_EXP_MAX \ + ((1<<SSE2_QOS_POL_COMM_BKT_LIMIT_EXP_SIZE) - 1) +#define SSE2_QOS_POL_COMM_BKT_LIMIT_MAX \ + ((u64)SSE2_QOS_POL_COMM_BKT_LIMIT_MANT_MAX << \ + (u64)SSE2_QOS_POL_COMM_BKT_LIMIT_EXP_MAX) + +#define SSE2_QOS_POL_EXTD_BKT_LIMIT_MANT_SIZE \ + (IPE_POLICER_FULL_WRITE_REQUEST_EBLM_MASK) +#define SSE2_QOS_POL_EXTD_BKT_LIMIT_MANT_MAX \ + ((1<<SSE2_QOS_POL_EXTD_BKT_LIMIT_MANT_SIZE) - 1) +#define SSE2_QOS_POL_EXTD_BKT_LIMIT_EXP_SIZE \ + (IPE_POLICER_FULL_WRITE_REQUEST_EBLE_MASK) +#define SSE2_QOS_POL_EXTD_BKT_LIMIT_EXP_MAX \ + ((1<<SSE2_QOS_POL_EXTD_BKT_LIMIT_EXP_SIZE) - 1) +#define SSE2_QOS_POL_EXT_BKT_LIMIT_MAX \ + ((u64)SSE2_QOS_POL_EXTD_BKT_LIMIT_MANT_MAX << \ + (u64)SSE2_QOS_POL_EXTD_BKT_LIMIT_EXP_MAX) + +/* + * Rates determine the units of the bucket + * 256.114688 Gbps < Rate 8 byte units + * 128.057344 Gbps < Rate <= 256.114688 Gbps 4 byte units + * 64.028672 Gbps < Rate <= 128.057344 Gbps 2 byte units + * Rate <= 64.028672 Gbps 1 byte units + * + * The code uses bytes per tick as oppose to Gigabits per second. + */ +#define RATE256 (256114688000LL / 8LL / SSE2_QOS_POL_TICKS_PER_SEC) +#define RATE128 (128057344000LL / 8LL / SSE2_QOS_POL_TICKS_PER_SEC) +#define RATE64 ( 64028672000LL / 8LL / SSE2_QOS_POL_TICKS_PER_SEC) + +#define RATE_OVER256_UNIT 8LL +#define RATE_128TO256_UNIT 4LL +#define RATE_64TO128_UNIT 2LL + +static int +sse2_qos_pol_round (u64 numerator, + u64 denominator, + u64 * rounded_value, sse2_qos_round_type_en round_type) +{ + int rc = 0; + + if (denominator == 0) + { + SSE2_QOS_DEBUG_ERROR ("Illegal denominator"); + SSE2_QOS_TR_ERR (SSE2_QOSRM_TP_ERR_59); + return (EINVAL); + } + + switch (round_type) + { + case SSE2_QOS_ROUND_TO_CLOSEST: + *rounded_value = ((numerator + (denominator >> 1)) / denominator); + break; + + case SSE2_QOS_ROUND_TO_UP: + *rounded_value = (numerator / denominator); + if ((*rounded_value * denominator) < numerator) + { + *rounded_value += 1; + } + break; + + case SSE2_QOS_ROUND_TO_DOWN: + *rounded_value = (numerator / denominator); + break; + + case SSE2_QOS_ROUND_INVALID: + default: + SSE2_QOS_DEBUG_ERROR ("Illegal round type"); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_60, round_type); + rc = EINVAL; + break; + } + return (rc); +} + + +static int +sse2_pol_validate_cfg_params (sse2_qos_pol_cfg_params_st * cfg) +{ + u64 numer, denom, rnd_value; + u32 cir_hw, eir_hw; + int rc = 0; + + if ((cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_2698) && + (cfg->rb.kbps.eir_kbps < cfg->rb.kbps.cir_kbps)) + { + SSE2_QOS_DEBUG_ERROR ("CIR (%u kbps) is greater than PIR (%u kbps)", + cfg->rb.kbps.cir_kbps, cfg->rb.kbps.eir_kbps); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_39, cfg->rb.kbps.cir_kbps, + cfg->rb.kbps.eir_kbps); + return (EINVAL); + } + + /* + * convert rates to bytes-per-tick + */ + numer = (u64) (cfg->rb.kbps.cir_kbps); + denom = (u64) (8 * SSE2_QOS_POL_TICKS_PER_SEC) / 1000; + rc = sse2_qos_pol_round (numer, denom, &rnd_value, + (sse2_qos_round_type_en) cfg->rnd_type); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Unable to convert CIR to bytes/tick format"); + // Error traced + return (rc); + } + cir_hw = (u32) rnd_value; + + numer = (u64) (cfg->rb.kbps.eir_kbps); + rc = sse2_qos_pol_round (numer, denom, &rnd_value, + (sse2_qos_round_type_en) cfg->rnd_type); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Unable to convert EIR to bytes/tick format"); + // Error traced + return (rc); + } + eir_hw = (u32) rnd_value; + + if (cir_hw > SSE2_QOS_POL_AVG_RATE_MAX) + { + SSE2_QOS_DEBUG_ERROR ("hw cir (%u bytes/tick) is greater than the " + "max supported value (%u)", cir_hw, + SSE2_QOS_POL_AVG_RATE_MAX); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_84, cir_hw, SSE2_QOS_POL_AVG_RATE_MAX); + return (EINVAL); + } + + if (eir_hw > SSE2_QOS_POL_PEAK_RATE_MAX) + { + SSE2_QOS_DEBUG_ERROR ("hw eir (%u bytes/tick) is greater than the " + "max supported value (%u). Capping it to the max. " + "supported value", eir_hw, + SSE2_QOS_POL_PEAK_RATE_MAX); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_85, eir_hw, + SSE2_QOS_POL_PEAK_RATE_MAX); + return (EINVAL); + } + /* + * CIR = 0, with bc != 0 is not allowed + */ + if ((cfg->rb.kbps.cir_kbps == 0) && cfg->rb.kbps.cb_bytes) + { + SSE2_QOS_DEBUG_ERROR ("CIR = 0 with bc != 0"); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_55); + return (EINVAL); + } + + if ((cfg->rb.kbps.eir_kbps == 0) && + (cfg->rfc > SSE2_QOS_POLICER_TYPE_1R3C_RFC_2697)) + { + SSE2_QOS_DEBUG_ERROR ("EIR = 0 for a 2R3C policer (rfc: %u)", cfg->rfc); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_23, cfg->rb.kbps.eir_kbps, cfg->rfc); + return (EINVAL); + } + + if (cfg->rb.kbps.eir_kbps && + (cfg->rfc < SSE2_QOS_POLICER_TYPE_2R3C_RFC_2698)) + { + SSE2_QOS_DEBUG_ERROR ("EIR: %u kbps for a 1-rate policer (rfc: %u)", + cfg->rb.kbps.eir_kbps, cfg->rfc); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_23, cfg->rb.kbps.eir_kbps, cfg->rfc); + return (EINVAL); + } + + if ((cfg->rfc == SSE2_QOS_POLICER_TYPE_1R2C) && cfg->rb.kbps.eb_bytes) + { + SSE2_QOS_DEBUG_ERROR ("For a 1R1B policer, EB burst cannot be > 0"); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_56); + return (EINVAL); + } + + return (0); +} + +static void +sse2_qos_convert_value_to_exp_mant_fmt (u64 value, + u16 max_exp_value, + u16 max_mant_value, + sse2_qos_round_type_en type, + u8 * exp, u32 * mant) +{ + u64 rnd_value; + u64 temp_mant; + u8 temp_exp; + + /* + * Select the lowest possible exp, and the largest possible mant + */ + temp_exp = 0; + temp_mant = value; + while (temp_exp <= max_exp_value) + { + if (temp_mant <= max_mant_value) + { + break; + } + + temp_exp++; + rnd_value = 0; + (void) sse2_qos_pol_round ((u64) value, (u64) (1 << temp_exp), + &rnd_value, type); + temp_mant = rnd_value; + } + + if (temp_exp > max_exp_value) + { + /* + * CAP mant to its max value, and decrement exp + */ + temp_exp--; + temp_mant = max_mant_value; + } + + *exp = temp_exp; + *mant = (u32) temp_mant; + + SSE2_QOS_DEBUG_INFO ("value: 0x%llx, mant: %u, exp: %u", value, *mant, + *exp); + return; +} + +static int +sse2_pol_convert_cfg_rates_to_hw (sse2_qos_pol_cfg_params_st * cfg, + sse2_qos_pol_hw_params_st * hw) +{ + int rc = 0; + u32 cir_hw, eir_hw, hi_mant, hi_rate, cir_rnded, eir_rnded, eir_kbps; + u64 numer, denom, rnd_value; + u8 exp; + + /* + * convert rates to bytes-per-tick (tick is 1ms) + * For rate conversion, the denominator is gonna be the same + */ + denom = (u64) ((SSE2_QOS_POL_TICKS_PER_SEC * 8) / 1000); + numer = (u64) (cfg->rb.kbps.cir_kbps); + rc = sse2_qos_pol_round (numer, denom, &rnd_value, + (sse2_qos_round_type_en) cfg->rnd_type); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR + ("Rounding error, rate: %d kbps, rounding_type: %d", + cfg->rb.kbps.cir_kbps, cfg->rnd_type); + // Error is traced + return (rc); + } + cir_hw = (u32) rnd_value; + + if (cfg->rb.kbps.cir_kbps && (cir_hw == 0)) + { + /* + * After rounding, cir_hw = 0. Bump it up + */ + cir_hw = 1; + } + + if (cfg->rfc == SSE2_QOS_POLICER_TYPE_1R2C) + { + eir_kbps = 0; + } + else if (cfg->rfc == SSE2_QOS_POLICER_TYPE_1R3C_RFC_2697) + { + eir_kbps = cfg->rb.kbps.cir_kbps; + } + else if (cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_4115) + { + eir_kbps = cfg->rb.kbps.eir_kbps - cfg->rb.kbps.cir_kbps; + } + else + { + eir_kbps = cfg->rb.kbps.eir_kbps; + } + + numer = (u64) eir_kbps; + rc = sse2_qos_pol_round (numer, denom, &rnd_value, + (sse2_qos_round_type_en) cfg->rnd_type); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR + ("Rounding error, rate: %d kbps, rounding_type: %d", eir_kbps, + cfg->rnd_type); + // Error is traced + return (rc); + } + eir_hw = (u32) rnd_value; + + if (eir_kbps && (eir_hw == 0)) + { + /* + * After rounding, eir_hw = 0. Bump it up + */ + eir_hw = 1; + } + + SSE2_QOS_DEBUG_INFO ("cir_hw: %u bytes/tick, eir_hw: %u bytes/tick", cir_hw, + eir_hw); + + if (cir_hw > eir_hw) + { + hi_rate = cir_hw; + } + else + { + hi_rate = eir_hw; + } + + if ((cir_hw == 0) && (eir_hw == 0)) + { + /* + * Both the rates are 0. Use exp = 15, and set the RFC to 4115. Also + * set AN = 0 + */ + exp = (u8) SSE2_QOS_POL_RATE_EXP_MAX; + hi_mant = 0; + hw->rfc = IPE_RFC_RFC4115; + hw->allow_negative = 0; + } + else + { + sse2_qos_convert_value_to_exp_mant_fmt (hi_rate, + (u16) SSE2_QOS_POL_RATE_EXP_MAX, + (u16) + SSE2_QOS_POL_AVG_RATE_MANT_MAX, + (sse2_qos_round_type_en) + cfg->rnd_type, &exp, &hi_mant); + } + + denom = (1ULL << exp); + if (hi_rate == eir_hw) + { + hw->peak_rate_man = (u16) hi_mant; + rc = sse2_qos_pol_round ((u64) cir_hw, denom, &rnd_value, + (sse2_qos_round_type_en) cfg->rnd_type); + hw->avg_rate_man = (u16) rnd_value; + } + else + { + hw->avg_rate_man = (u16) hi_mant; + rc = sse2_qos_pol_round ((u64) eir_hw, denom, &rnd_value, + (sse2_qos_round_type_en) cfg->rnd_type); + hw->peak_rate_man = (u16) rnd_value; + } + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Rounding error"); + // Error is traced + return (rc); + } + hw->rate_exp = exp; + + if ((hw->avg_rate_man == 0) && (cfg->rb.kbps.cir_kbps)) + { + /* + * cir was reduced to 0 during rounding. Bump it up + */ + hw->avg_rate_man = 1; + SSE2_QOS_DEBUG_INFO ("CIR = 0 during rounding. Bump it up to %u " + "bytes/tick", (hw->avg_rate_man << hw->rate_exp)); + } + + if ((hw->peak_rate_man == 0) && eir_kbps) + { + /* + * eir was reduced to 0 during rounding. Bump it up + */ + hw->peak_rate_man = 1; + SSE2_QOS_DEBUG_INFO ("EIR = 0 during rounding. Bump it up to %u " + "bytes/tick", (hw->peak_rate_man << hw->rate_exp)); + } + + cir_rnded = (hw->avg_rate_man << hw->rate_exp); + eir_rnded = (hw->peak_rate_man << hw->rate_exp); + + SSE2_QOS_DEBUG_INFO ("Configured(rounded) values, cir: %u " + "kbps (mant: %u, exp: %u, rate: %u bytes/tick)", + cfg->rb.kbps.cir_kbps, hw->avg_rate_man, + hw->rate_exp, cir_rnded); + + SSE2_QOS_DEBUG_INFO ("Configured(rounded) values, eir: %u " + "kbps (mant: %u, exp: %u, rate: %u bytes/tick)", + cfg->rb.kbps.eir_kbps, hw->peak_rate_man, + hw->rate_exp, eir_rnded); + + return (rc); +} + +/***** + * NAME + * sse2_pol_get_bkt_max + * + * PARAMETERS + * rate_hw - either the averate rate or peak rate + * bkt_max - bit width in the current bucket or extended bucket + * + * RETURNS + * u64 - maximum token bytes for the current or extended bucket + * + * DESCRIPTION + * The current bucket or extended bucket fields are in units of either + * 1,2,4,8 bytes based on the average or peak rate respective to current + * or extended bucket. + * + * To get the actual maximum number of bytes that can be stored in the + * field, the value must be multiplied by the units of either 1,2,4,8 + * bytes based on the rate. + *****/ +u64 +sse2_pol_get_bkt_max (u64 rate_hw, u64 bkt_max) +{ + if (rate_hw <= RATE64) + { + return (bkt_max - 1); + } + else if (rate_hw <= RATE128) + { + return ((bkt_max * RATE_64TO128_UNIT) - RATE_64TO128_UNIT); + } + else if (rate_hw <= RATE256) + { + return ((bkt_max * RATE_128TO256_UNIT) - RATE_128TO256_UNIT); + } + /* rate must be over 256 */ + return ((bkt_max * RATE_OVER256_UNIT) - RATE_OVER256_UNIT); +} + +/***** + * NAME + * sse2_pol_get_bkt_value + * + * PARAMETERS + * rate_hw - either the averate rate or peak rate + * byte_value - bytes for this token bucket + * + * RETURNS + * u64 - unit value for the current or extended bucket field + * + * DESCRIPTION + * The current bucket or extended bucket fields are in units of either + * 1,2,4,8 bytes based on the average or peak rate respective to current + * or extended bucket. + * + * To get the units that can be stored in the field, the byte value must + * be divided by the units of either 1,2,4,8 bytes based on the rate. + *****/ +u64 +sse2_pol_get_bkt_value (u64 rate_hw, u64 byte_value) +{ + if (rate_hw <= RATE64) + { + return (byte_value); + } + else if (rate_hw <= RATE128) + { + return (byte_value / RATE_64TO128_UNIT); + } + else if (rate_hw <= RATE256) + { + return (byte_value / RATE_128TO256_UNIT); + } + /* rate must be over 256 */ + return (byte_value / RATE_OVER256_UNIT); +} + +static void +sse2_pol_rnd_burst_byte_fmt (u64 cfg_burst, + u16 max_exp_value, + u16 max_mant_value, + u32 max_bkt_value, + u32 rate_hw, + u8 * exp, u32 * mant, u32 * bkt_value) +{ + u64 bkt_max = max_bkt_value; + u64 bkt_limit_max; + u64 rnd_burst; + u64 temp_bkt_value; + + bkt_limit_max = ((u64) max_mant_value << (u64) max_exp_value); + bkt_max = sse2_pol_get_bkt_max (rate_hw, bkt_max); + bkt_max = MIN (bkt_max, bkt_limit_max); + if (!cfg_burst) + { + /* + * If configured burst = 0, compute the burst to be 100ms at a given + * rate. Note that for rate_hw = 0, exp = mant = 0. + */ + cfg_burst = (u64) rate_hw *(u64) SSE2_QOS_POL_DEF_BURST_BYTE; + } + + if (cfg_burst > bkt_max) + { + SSE2_QOS_DEBUG_ERROR ("burst 0x%llx bytes is greater than the max. " + "supported value 0x%llx bytes. Capping it to the " + "max", cfg_burst, bkt_max); + SSE2_QOS_TR_INFO (SSE2_QOS_TP_INFO_38, + (uint) cfg_burst, (uint) bkt_max); + cfg_burst = bkt_max; + } + + if (cfg_burst < SSE2_QOS_POL_MIN_BURST_BYTE) + { + /* + * Bump up the burst value ONLY if the cfg_burst is non-zero AND + * less than the min. supported value + */ + SSE2_QOS_DEBUG_INFO ("burst 0x%llx bytes is less than the min " + "supported value %u bytes. Rounding it up to " + "the min", cfg_burst, SSE2_QOS_POL_MIN_BURST_BYTE); + SSE2_QOS_TR_INFO (SSE2_QOS_TP_INFO_39, (uint) cfg_burst, + SSE2_QOS_POL_MIN_BURST_BYTE); + cfg_burst = SSE2_QOS_POL_MIN_BURST_BYTE; + } + + sse2_qos_convert_value_to_exp_mant_fmt (cfg_burst, + max_exp_value, + max_mant_value, + SSE2_QOS_ROUND_TO_DOWN, exp, mant); + + /* Bucket value is based on rate. */ + rnd_burst = ((u64) (*mant) << (u64) (*exp)); + temp_bkt_value = sse2_pol_get_bkt_value (rate_hw, rnd_burst); + *bkt_value = (u32) temp_bkt_value; +} + +static int +sse2_pol_convert_cfg_burst_to_hw (sse2_qos_pol_cfg_params_st * cfg, + sse2_qos_pol_hw_params_st * hw) +{ + u8 temp_exp; + u32 temp_mant, rate_hw; + u64 eb_bytes; + u32 bkt_value; + + /* + * compute Committed Burst + */ + SSE2_QOS_DEBUG_INFO ("Compute commit burst ..."); + rate_hw = (hw->avg_rate_man) << (hw->rate_exp); + sse2_pol_rnd_burst_byte_fmt (cfg->rb.kbps.cb_bytes, + (u16) SSE2_QOS_POL_COMM_BKT_LIMIT_EXP_MAX, + (u16) SSE2_QOS_POL_COMM_BKT_LIMIT_MANT_MAX, + (u32) SSE2_QOS_POL_COMM_BKT_MAX, + rate_hw, &temp_exp, &temp_mant, &bkt_value); + SSE2_QOS_DEBUG_INFO ("Committed burst, burst_limit: 0x%llx mant : %u, " + "exp: %u, rnded: 0x%llx cb:%u bytes", + cfg->rb.kbps.cb_bytes, temp_mant, temp_exp, + ((u64) temp_mant << (u64) temp_exp), bkt_value); + + hw->comm_bkt_limit_exp = temp_exp; + hw->comm_bkt_limit_man = (u8) temp_mant; + hw->comm_bkt = bkt_value; + + /* + * compute Exceed Burst + */ + SSE2_QOS_DEBUG_INFO ("Compute exceed burst ..."); + + if (cfg->rfc == SSE2_QOS_POLICER_TYPE_1R2C) + { + /* + * For 1R2C, hw uses 2R3C (RFC-4115). As such, the Exceed Bucket + * params are set to 0. Recommendation is to use EB_exp = max_exp (=15) + * and EB_mant = 0 + */ + hw->extd_bkt_limit_exp = (u8) SSE2_QOS_POL_EXTD_BKT_LIMIT_EXP_MAX; + hw->extd_bkt_limit_man = 0; + SSE2_QOS_DEBUG_INFO ("Excess burst, burst: 0x%llx mant: %u, " + "exp: %u, rnded: 0x%llx bytes", + cfg->rb.kbps.eb_bytes, hw->extd_bkt_limit_man, + hw->extd_bkt_limit_exp, + ((u64) hw->extd_bkt_limit_man << + (u64) hw->extd_bkt_limit_exp)); + SSE2_QOS_TR_INFO (SSE2_QOS_TP_INFO_20, (uint) cfg->rb.kbps.eb_bytes, + hw->extd_bkt_limit_man, hw->extd_bkt_limit_exp); + return (0); + } + + if (cfg->rfc == SSE2_QOS_POLICER_TYPE_1R3C_RFC_2697) + { + eb_bytes = cfg->rb.kbps.cb_bytes + cfg->rb.kbps.eb_bytes; + } + else if (cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_4115) + { + eb_bytes = cfg->rb.kbps.eb_bytes - cfg->rb.kbps.cb_bytes; + } + else + { + eb_bytes = cfg->rb.kbps.eb_bytes; + } + + rate_hw = (hw->peak_rate_man) << (hw->rate_exp); + sse2_pol_rnd_burst_byte_fmt (eb_bytes, + (u16) SSE2_QOS_POL_EXTD_BKT_LIMIT_EXP_MAX, + (u16) SSE2_QOS_POL_EXTD_BKT_LIMIT_MANT_MAX, + (u32) SSE2_QOS_POL_EXTD_BKT_MAX, + rate_hw, &temp_exp, &temp_mant, &bkt_value); + + SSE2_QOS_DEBUG_INFO ("Excess burst, burst_limit: 0x%llx mant: %u, " + "exp: %u, rnded: 0x%llx eb:%u bytes", + cfg->rb.kbps.eb_bytes, temp_mant, temp_exp, + ((u64) temp_mant << (u64) temp_exp), bkt_value); + + hw->extd_bkt_limit_exp = (u8) temp_exp; + hw->extd_bkt_limit_man = (u8) temp_mant; + hw->extd_bkt = bkt_value; + + return (0); +} + + +/* + * Input: configured parameter values in 'cfg'. + * Output: h/w programmable parameter values in 'hw'. + * Return: success or failure code. + */ +static int +sse2_pol_convert_cfg_to_hw_params (sse2_qos_pol_cfg_params_st * cfg, + sse2_qos_pol_hw_params_st * hw) +{ + int rc = 0; + + /* + * clear the hw_params + */ + memset (hw, 0, sizeof (sse2_qos_pol_hw_params_st)); + + hw->allow_negative = SSE2_QOS_POL_ALLOW_NEGATIVE; + + if ((cfg->rfc == SSE2_QOS_POLICER_TYPE_1R2C) || + (cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_4115)) + { + hw->rfc = IPE_RFC_RFC4115; + } + else if (cfg->rfc == SSE2_QOS_POLICER_TYPE_1R3C_RFC_2697) + { + hw->rfc = IPE_RFC_RFC2697; + } + else if (cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_2698) + { + hw->rfc = IPE_RFC_RFC2698; + } + else if (cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_MEF5CF1) + { + hw->rfc = IPE_RFC_MEF5CF1; + } + else + { + SSE2_QOS_DEBUG_ERROR ("Invalid RFC type %d\n", cfg->rfc); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_61, cfg->rfc); + return (EINVAL); + } + + rc = sse2_pol_convert_cfg_rates_to_hw (cfg, hw); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Unable to convert config rates to hw. Error: %d", + rc); + // Error is traced + return (rc); + } + + rc = sse2_pol_convert_cfg_burst_to_hw (cfg, hw); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Unable to convert config burst to hw. Error: %d", + rc); + // Error is traced + return (rc); + } + + return 0; +} + + +u32 +sse2_qos_convert_pps_to_kbps (u32 rate_pps) +{ + // sse2_qos_ship_inc_counter(SSE2_QOS_SHIP_COUNTER_TYPE_API_CNT, + // SSE2_QOS_SHIP_CNT_POL_CONV_PPS_TO_KBPS); + + u64 numer, rnd_value = 0; + + numer = (u64) ((u64) rate_pps * + (u64) SSE2_QOS_POLICER_FIXED_PKT_SIZE * 8LL); + (void) sse2_qos_pol_round (numer, 1000LL, &rnd_value, + SSE2_QOS_ROUND_TO_CLOSEST); + + return ((u32) rnd_value); +} + +u32 +sse2_qos_convert_burst_ms_to_bytes (u32 burst_ms, u32 rate_kbps) +{ + u64 numer, rnd_value = 0; + + //sse2_qos_ship_inc_counter(SSE2_QOS_SHIP_COUNTER_TYPE_API_CNT, + // SSE2_QOS_SHIP_CNT_POL_CONV_BURST_MS_TO_BYTES); + + numer = (u64) ((u64) burst_ms * (u64) rate_kbps); + + (void) sse2_qos_pol_round (numer, 8LL, &rnd_value, + SSE2_QOS_ROUND_TO_CLOSEST); + + return ((u32) rnd_value); +} + + +/* + * Input: configured parameters in 'cfg'. + * Output: h/w parameters are returned in 'hw', + * Return: Status, success or failure code. + */ +int +sse2_pol_compute_hw_params (sse2_qos_pol_cfg_params_st * cfg, + sse2_qos_pol_hw_params_st * hw) +{ + int rc = 0; + + if (!cfg || !hw) + { + SSE2_QOS_DEBUG_ERROR ("Illegal parameters"); + return (-1); + } + + /* + * Validate the police config params being presented to RM + */ + rc = sse2_pol_validate_cfg_params (cfg); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Config parameter validation failed. Error: %d", + rc); + // Error is traced + return (-1); + } + + /* + * first round configured values to h/w supported values. This func + * also determines whether 'tick' or 'byte' format + */ + rc = sse2_pol_convert_cfg_to_hw_params (cfg, hw); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Unable to convert config params to hw params. " + "Error: %d", rc); + SSE2_QOS_TR_ERR (SSE2_QOS_TP_ERR_53, rc); + return (-1); + } + + return 0; +} + + +#if defined (INTERNAL_SS) || defined (X86) + +// For initializing the x86 policer format + +/* + * Return the number of hardware TSC timer ticks per second for the dataplane. + * This is approximately, but not exactly, the clock speed. + */ +static u64 +get_tsc_hz (void) +{ + f64 cpu_freq; + + cpu_freq = os_cpu_clock_frequency (); + return (u64) cpu_freq; +} + +/* + * Convert rates into bytes_per_period and scale. + * Return 0 if ok or 1 if error. + */ +static int +compute_policer_params (u64 hz, // CPU speed in clocks per second + u64 cir_rate, // in bytes per second + u64 pir_rate, // in bytes per second + u32 * current_limit, // in bytes, output may scale the input + u32 * extended_limit, // in bytes, output may scale the input + u32 * cir_bytes_per_period, + u32 * pir_bytes_per_period, u32 * scale) +{ + double period; + double internal_cir_bytes_per_period; + double internal_pir_bytes_per_period; + u32 max; + u32 scale_shift; + u32 scale_amount; + u32 __attribute__ ((unused)) orig_current_limit = *current_limit; + + // Compute period. For 1Ghz-to-8Ghz CPUs, the period will be in + // the range of 16 to 116 usec. + period = ((double) hz) / ((double) POLICER_TICKS_PER_PERIOD); + + // Determine bytes per period for each rate + internal_cir_bytes_per_period = (double) cir_rate / period; + internal_pir_bytes_per_period = (double) pir_rate / period; + + // Scale if possible. Scaling helps rate accuracy, but is contrained + // by the scaled rates and limits fitting in 32-bits. + // In addition, we need to insure the scaled rate is no larger than + // 2^22 tokens per period. This allows the dataplane to ignore overflow + // in the tokens-per-period multiplication since it could only + // happen if the policer were idle for more than a year. + // This is not really a constraint because 100Gbps at 1Ghz is only + // 1.6M tokens per period. +#define MAX_RATE_SHIFT 10 + max = MAX (*current_limit, *extended_limit); + max = MAX (max, (u32) internal_cir_bytes_per_period << MAX_RATE_SHIFT); + max = MAX (max, (u32) internal_pir_bytes_per_period << MAX_RATE_SHIFT); + scale_shift = __builtin_clz (max); + + scale_amount = 1 << scale_shift; + *scale = scale_shift; + + // Scale the limits + *current_limit = *current_limit << scale_shift; + *extended_limit = *extended_limit << scale_shift; + + // Scale the rates + internal_cir_bytes_per_period = + internal_cir_bytes_per_period * ((double) scale_amount); + internal_pir_bytes_per_period = + internal_pir_bytes_per_period * ((double) scale_amount); + + // Make sure the new rates are reasonable + // Only needed for very low rates with large bursts + if (internal_cir_bytes_per_period < 1.0) + { + internal_cir_bytes_per_period = 1.0; + } + if (internal_pir_bytes_per_period < 1.0) + { + internal_pir_bytes_per_period = 1.0; + } + + *cir_bytes_per_period = (u32) internal_cir_bytes_per_period; + *pir_bytes_per_period = (u32) internal_pir_bytes_per_period; + +// #define PRINT_X86_POLICE_PARAMS +#ifdef PRINT_X86_POLICE_PARAMS + { + u64 effective_BPS; + + // This value actually slightly conservative because it doesn't take into account + // the partial period at the end of a second. This really matters only for very low + // rates. + effective_BPS = + (((u64) (*cir_bytes_per_period * (u64) period)) >> *scale); + + printf ("hz=%llu, cir_rate=%llu, limit=%u => " + "periods-per-sec=%d usec-per-period=%d => " + "scale=%d cir_BPP=%u, scaled_limit=%u => " + "effective BPS=%llu, accuracy=%f\n", + // input values + (unsigned long long) hz, + (unsigned long long) cir_rate, orig_current_limit, + // computed values + (u32) (period), // periods per second + (u32) (1000.0 * 1000.0 / period), // in usec + *scale, *cir_bytes_per_period, *current_limit, + // accuracy + (unsigned long long) effective_BPS, + (double) cir_rate / (double) effective_BPS); + } +#endif + + return 0; // ok +} + + +/* + * Input: configured parameters in 'cfg'. + * Output: h/w parameters are returned in 'hw', + * Return: Status, success or failure code. + */ +int +x86_pol_compute_hw_params (sse2_qos_pol_cfg_params_st * cfg, + policer_read_response_type_st * hw) +{ + const int BYTES_PER_KBIT = (1000 / 8); + u64 hz; + u32 cap; + + if (!cfg || !hw) + { + SSE2_QOS_DEBUG_ERROR ("Illegal parameters"); + return (-1); + } + + hz = get_tsc_hz (); + hw->last_update_time = 0; + + // Cap the bursts to 32-bits. This allows up to almost one second of + // burst on a 40GE interface, which should be fine for x86. + cap = + (cfg->rb.kbps.cb_bytes > 0xFFFFFFFF) ? 0xFFFFFFFF : cfg->rb.kbps.cb_bytes; + hw->current_limit = cap; + cap = + (cfg->rb.kbps.eb_bytes > 0xFFFFFFFF) ? 0xFFFFFFFF : cfg->rb.kbps.eb_bytes; + hw->extended_limit = cap; + + if ((cfg->rb.kbps.cir_kbps == 0) && (cfg->rb.kbps.cb_bytes == 0) + && (cfg->rb.kbps.eb_bytes == 0)) + { + // This is a uninitialized, always-violate policer + hw->single_rate = 1; + hw->cir_tokens_per_period = 0; + return 0; + } + + if ((cfg->rfc == SSE2_QOS_POLICER_TYPE_1R2C) || + (cfg->rfc == SSE2_QOS_POLICER_TYPE_1R3C_RFC_2697)) + { + // Single-rate policer + + hw->single_rate = 1; + + if ((cfg->rfc == SSE2_QOS_POLICER_TYPE_1R2C) && cfg->rb.kbps.eb_bytes) + { + SSE2_QOS_DEBUG_ERROR + ("Policer parameter validation failed -- 1R2C."); + return (-1); + } + + if ((cfg->rb.kbps.cir_kbps == 0) || + (cfg->rb.kbps.eir_kbps != 0) || + ((cfg->rb.kbps.cb_bytes == 0) && (cfg->rb.kbps.eb_bytes == 0))) + { + SSE2_QOS_DEBUG_ERROR ("Policer parameter validation failed -- 1R."); + return (-1); + } + + if (compute_policer_params (hz, + (u64) cfg->rb.kbps.cir_kbps * + BYTES_PER_KBIT, 0, &hw->current_limit, + &hw->extended_limit, + &hw->cir_tokens_per_period, + &hw->pir_tokens_per_period, &hw->scale)) + { + SSE2_QOS_DEBUG_ERROR ("Policer parameter computation failed."); + return (-1); + } + + } + else if ((cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_2698) || + (cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_4115)) + { + // Two-rate policer + + if ((cfg->rb.kbps.cir_kbps == 0) || (cfg->rb.kbps.eir_kbps == 0) + || (cfg->rb.kbps.eir_kbps < cfg->rb.kbps.cir_kbps) + || (cfg->rb.kbps.cb_bytes == 0) || (cfg->rb.kbps.eb_bytes == 0)) + { + SSE2_QOS_DEBUG_ERROR ("Config parameter validation failed."); + return (-1); + } + + if (compute_policer_params (hz, + (u64) cfg->rb.kbps.cir_kbps * + BYTES_PER_KBIT, + (u64) cfg->rb.kbps.eir_kbps * + BYTES_PER_KBIT, &hw->current_limit, + &hw->extended_limit, + &hw->cir_tokens_per_period, + &hw->pir_tokens_per_period, &hw->scale)) + { + SSE2_QOS_DEBUG_ERROR ("Policer parameter computation failed."); + return (-1); + } + + } + else + { + SSE2_QOS_DEBUG_ERROR + ("Config parameter validation failed. RFC not supported"); + return (-1); + } + + hw->current_bucket = hw->current_limit; + hw->extended_bucket = hw->extended_limit; + + return 0; +} +#endif + + +/* + * Input: configured parameters in 'cfg'. + * Output: physical structure is returned in 'phys', + * Return: Status, success or failure code. + */ +int +sse2_pol_logical_2_physical (sse2_qos_pol_cfg_params_st * cfg, + policer_read_response_type_st * phys) +{ + int rc; + sse2_qos_pol_hw_params_st pol_hw; + sse2_qos_pol_cfg_params_st kbps_cfg; + + memset (phys, 0, sizeof (policer_read_response_type_st)); + memset (&kbps_cfg, 0, sizeof (sse2_qos_pol_cfg_params_st)); + + if (!cfg) + { + SSE2_QOS_DEBUG_ERROR ("Illegal parameters"); + return (-1); + } + + switch (cfg->rate_type) + { + case SSE2_QOS_RATE_KBPS: + /* copy all the data into kbps_cfg */ + kbps_cfg.rb.kbps.cir_kbps = cfg->rb.kbps.cir_kbps; + kbps_cfg.rb.kbps.eir_kbps = cfg->rb.kbps.eir_kbps; + kbps_cfg.rb.kbps.cb_bytes = cfg->rb.kbps.cb_bytes; + kbps_cfg.rb.kbps.eb_bytes = cfg->rb.kbps.eb_bytes; + break; + case SSE2_QOS_RATE_PPS: + kbps_cfg.rb.kbps.cir_kbps = + sse2_qos_convert_pps_to_kbps (cfg->rb.pps.cir_pps); + kbps_cfg.rb.kbps.eir_kbps = + sse2_qos_convert_pps_to_kbps (cfg->rb.pps.eir_pps); + kbps_cfg.rb.kbps.cb_bytes = sse2_qos_convert_burst_ms_to_bytes ((u32) + cfg-> + rb.pps.cb_ms, + kbps_cfg.rb. + kbps.cir_kbps); + kbps_cfg.rb.kbps.eb_bytes = + sse2_qos_convert_burst_ms_to_bytes ((u32) cfg->rb.pps.eb_ms, + kbps_cfg.rb.kbps.eir_kbps); + break; + default: + SSE2_QOS_DEBUG_ERROR ("Illegal rate type"); + return (-1); + } + + /* rate type is now converted to kbps */ + kbps_cfg.rate_type = SSE2_QOS_RATE_KBPS; + kbps_cfg.rnd_type = cfg->rnd_type; + kbps_cfg.rfc = cfg->rfc; + + phys->action[POLICE_CONFORM] = cfg->conform_action.action_type; + phys->mark_dscp[POLICE_CONFORM] = cfg->conform_action.dscp; + phys->action[POLICE_EXCEED] = cfg->exceed_action.action_type; + phys->mark_dscp[POLICE_EXCEED] = cfg->exceed_action.dscp; + phys->action[POLICE_VIOLATE] = cfg->violate_action.action_type; + phys->mark_dscp[POLICE_VIOLATE] = cfg->violate_action.dscp; + + phys->color_aware = cfg->color_aware; + +#if !defined (INTERNAL_SS) && !defined (X86) + // convert logical into hw params which involves qos calculations + rc = sse2_pol_compute_hw_params (&kbps_cfg, &pol_hw); + if (rc == -1) + { + SSE2_QOS_DEBUG_ERROR ("Unable to compute hw param. Error: %d", rc); + return (rc); + } + + // convert hw params into the physical + phys->rfc = pol_hw.rfc; + phys->an = pol_hw.allow_negative; + phys->rexp = pol_hw.rate_exp; + phys->arm = pol_hw.avg_rate_man; + phys->prm = pol_hw.peak_rate_man; + phys->cble = pol_hw.comm_bkt_limit_exp; + phys->cblm = pol_hw.comm_bkt_limit_man; + phys->eble = pol_hw.extd_bkt_limit_exp; + phys->eblm = pol_hw.extd_bkt_limit_man; + phys->cb = pol_hw.comm_bkt; + phys->eb = pol_hw.extd_bkt; + + /* for debugging purposes, the bucket token values can be overwritten */ + if (cfg->overwrite_bucket) + { + phys->cb = cfg->current_bucket; + phys->eb = cfg->extended_bucket; + } +#else + // convert logical into hw params which involves qos calculations + rc = x86_pol_compute_hw_params (&kbps_cfg, phys); + if (rc == -1) + { + SSE2_QOS_DEBUG_ERROR ("Unable to compute hw param. Error: %d", rc); + return (rc); + } + + /* for debugging purposes, the bucket token values can be overwritten */ + if (cfg->overwrite_bucket) + { + phys->current_bucket = cfg->current_bucket; + phys->extended_bucket = cfg->extended_bucket; + } + + // Touch to avoid compiler warning for X86 + pol_hw.allow_negative = pol_hw.allow_negative; + +#endif // if !defined (INTERNAL_SS) && !defined (X86) + + return 0; +} + + +static void +sse2_qos_convert_pol_bucket_to_hw_fmt (policer_read_response_type_st * bkt, + sse2_qos_pol_hw_params_st * hw_fmt) +{ + memset (hw_fmt, 0, sizeof (sse2_qos_pol_hw_params_st)); +#if !defined (INTERNAL_SS) && !defined (X86) + hw_fmt->rfc = (u8) bkt->rfc; + hw_fmt->allow_negative = (u8) bkt->an; + hw_fmt->rate_exp = (u8) bkt->rexp; + hw_fmt->avg_rate_man = (u16) bkt->arm; + hw_fmt->peak_rate_man = (u16) bkt->prm; + hw_fmt->comm_bkt_limit_man = (u8) bkt->cblm; + hw_fmt->comm_bkt_limit_exp = (u8) bkt->cble; + hw_fmt->extd_bkt_limit_man = (u8) bkt->eblm; + hw_fmt->extd_bkt_limit_exp = (u8) bkt->eble; + hw_fmt->extd_bkt = bkt->eb; + hw_fmt->comm_bkt = bkt->cb; +#endif // if !defined (INTERNAL_SS) && !defined (X86) +} + +/* + * Input: h/w programmable parameter values in 'hw' + * Output: configured parameter values in 'cfg' + * Return: Status, success or failure code. + */ +static int +sse2_pol_convert_hw_to_cfg_params (sse2_qos_pol_hw_params_st * hw, + sse2_qos_pol_cfg_params_st * cfg) +{ + u64 temp_rate; + + if ((hw == NULL) || (cfg == NULL)) + { + return EINVAL; + } + + if ((hw->rfc == IPE_RFC_RFC4115) && + !(hw->peak_rate_man << hw->rate_exp) && !(hw->extd_bkt_limit_man)) + { + /* + * For a 1R2C, we set EIR = 0, EB = 0 + */ + cfg->rfc = SSE2_QOS_POLICER_TYPE_1R2C; + } + else if (hw->rfc == IPE_RFC_RFC2697) + { + cfg->rfc = SSE2_QOS_POLICER_TYPE_1R3C_RFC_2697; + } + else if (hw->rfc == IPE_RFC_RFC2698) + { + cfg->rfc = SSE2_QOS_POLICER_TYPE_2R3C_RFC_2698; + } + else if (hw->rfc == IPE_RFC_RFC4115) + { + cfg->rfc = SSE2_QOS_POLICER_TYPE_2R3C_RFC_4115; + } + else if (hw->rfc == IPE_RFC_MEF5CF1) + { + cfg->rfc = SSE2_QOS_POLICER_TYPE_2R3C_RFC_MEF5CF1; + } + else + { + return EINVAL; + } + + temp_rate = (((u64) hw->avg_rate_man << hw->rate_exp) * 8LL * + SSE2_QOS_POL_TICKS_PER_SEC) / 1000; + cfg->rb.kbps.cir_kbps = (u32) temp_rate; + + temp_rate = (((u64) hw->peak_rate_man << hw->rate_exp) * 8LL * + SSE2_QOS_POL_TICKS_PER_SEC) / 1000; + cfg->rb.kbps.eir_kbps = (u32) temp_rate; + + cfg->rb.kbps.cb_bytes = ((u64) hw->comm_bkt_limit_man << + (u64) hw->comm_bkt_limit_exp); + cfg->rb.kbps.eb_bytes = ((u64) hw->extd_bkt_limit_man << + (u64) hw->extd_bkt_limit_exp); + + if (cfg->rfc == SSE2_QOS_POLICER_TYPE_1R3C_RFC_2697) + { + /* + * For 1R3C in the hardware, EB = sum(CB, EB). Also, EIR = CIR. Restore + * values such that the configured params don't reflect this adjustment + */ + cfg->rb.kbps.eb_bytes = (cfg->rb.kbps.eb_bytes - cfg->rb.kbps.cb_bytes); + cfg->rb.kbps.eir_kbps = 0; + } + else if (cfg->rfc == SSE2_QOS_POLICER_TYPE_2R3C_RFC_4115) + { + /* + * For 4115 in the hardware is excess rate and burst, but EA provides + * peak-rate, so adjust it to be eir + */ + cfg->rb.kbps.eir_kbps += cfg->rb.kbps.cir_kbps; + cfg->rb.kbps.eb_bytes += cfg->rb.kbps.cb_bytes; + } + /* h/w conversion to cfg is in kbps */ + cfg->rate_type = SSE2_QOS_RATE_KBPS; + cfg->overwrite_bucket = 0; + cfg->current_bucket = hw->comm_bkt; + cfg->extended_bucket = hw->extd_bkt; + + SSE2_QOS_DEBUG_INFO ("configured params, cir: %u kbps, eir: %u kbps, cb " + "burst: 0x%llx bytes, eb burst: 0x%llx bytes", + cfg->rb.kbps.cir_kbps, cfg->rb.kbps.eir_kbps, + cfg->rb.kbps.cb_bytes, cfg->rb.kbps.eb_bytes); + SSE2_QOS_TR_INFO (SSE2_QOS_TP_INFO_22, cfg->rb.kbps.cir_kbps, + cfg->rb.kbps.eir_kbps, + (uint) cfg->rb.kbps.cb_bytes, + (uint) cfg->rb.kbps.eb_bytes); + + return 0; +} + +u32 +sse2_qos_convert_kbps_to_pps (u32 rate_kbps) +{ + u64 numer, denom, rnd_value = 0; + + // sse_qosrm_ship_inc_counter(SSE2_QOS_SHIP_COUNTER_TYPE_API_CNT, + // SSE2_QOS_SHIP_CNT_POL_CONV_KBPS_TO_PPS); + + numer = (u64) ((u64) rate_kbps * 1000LL); + denom = (u64) ((u64) SSE2_QOS_POLICER_FIXED_PKT_SIZE * 8LL); + + (void) sse2_qos_pol_round (numer, denom, &rnd_value, + SSE2_QOS_ROUND_TO_CLOSEST); + + return ((u32) rnd_value); +} + +u32 +sse2_qos_convert_burst_bytes_to_ms (u64 burst_bytes, u32 rate_kbps) +{ + u64 numer, denom, rnd_value = 0; + + //sse_qosrm_ship_inc_counter(SSE2_QOS_SHIP_COUNTER_TYPE_API_CNT, + // SSE2_QOS_SHIP_CNT_POL_CONV_BYTES_TO_BURST_MS); + + numer = burst_bytes * 8LL; + denom = (u64) rate_kbps; + + (void) sse2_qos_pol_round (numer, denom, &rnd_value, + SSE2_QOS_ROUND_TO_CLOSEST); + + return ((u32) rnd_value); +} + +/* + * Input: physical structure in 'phys', rate_type in cfg + * Output: configured parameters in 'cfg'. + * Return: Status, success or failure code. + */ +int +sse2_pol_physical_2_logical (policer_read_response_type_st * phys, + sse2_qos_pol_cfg_params_st * cfg) +{ + int rc; + sse2_qos_pol_hw_params_st pol_hw; + sse2_qos_pol_cfg_params_st kbps_cfg; + + memset (&pol_hw, 0, sizeof (sse2_qos_pol_hw_params_st)); + memset (&kbps_cfg, 0, sizeof (sse2_qos_pol_cfg_params_st)); + + if (!phys) + { + SSE2_QOS_DEBUG_ERROR ("Illegal parameters"); + return (-1); + } + + sse2_qos_convert_pol_bucket_to_hw_fmt (phys, &pol_hw); + + rc = sse2_pol_convert_hw_to_cfg_params (&pol_hw, &kbps_cfg); + if (rc != 0) + { + SSE2_QOS_DEBUG_ERROR ("Unable to convert hw params to config params. " + "Error: %d", rc); + return (-1); + } + + /* check what rate type is required */ + switch (cfg->rate_type) + { + case SSE2_QOS_RATE_KBPS: + /* copy all the data into kbps_cfg */ + cfg->rb.kbps.cir_kbps = kbps_cfg.rb.kbps.cir_kbps; + cfg->rb.kbps.eir_kbps = kbps_cfg.rb.kbps.eir_kbps; + cfg->rb.kbps.cb_bytes = kbps_cfg.rb.kbps.cb_bytes; + cfg->rb.kbps.eb_bytes = kbps_cfg.rb.kbps.eb_bytes; + break; + case SSE2_QOS_RATE_PPS: + cfg->rb.pps.cir_pps = + sse2_qos_convert_kbps_to_pps (kbps_cfg.rb.kbps.cir_kbps); + cfg->rb.pps.eir_pps = + sse2_qos_convert_kbps_to_pps (kbps_cfg.rb.kbps.eir_kbps); + cfg->rb.pps.cb_ms = + sse2_qos_convert_burst_bytes_to_ms (kbps_cfg.rb.kbps.cb_bytes, + kbps_cfg.rb.kbps.cir_kbps); + cfg->rb.pps.eb_ms = + sse2_qos_convert_burst_bytes_to_ms (kbps_cfg.rb.kbps.eb_bytes, + kbps_cfg.rb.kbps.eir_kbps); + break; + default: + SSE2_QOS_DEBUG_ERROR ("Illegal rate type"); + return (-1); + } + + /* cfg->rate_type remains what it was */ + cfg->rnd_type = kbps_cfg.rnd_type; + cfg->rfc = kbps_cfg.rfc; + cfg->overwrite_bucket = kbps_cfg.overwrite_bucket; + cfg->current_bucket = kbps_cfg.current_bucket; + cfg->extended_bucket = kbps_cfg.extended_bucket; + + return 0; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |