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author | Eilon Greenstein <eilong@broadcom.com> | 2009-02-12 08:36:40 +0000 |
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committer | David S. Miller <davem@davemloft.net> | 2009-02-15 23:31:14 -0800 |
commit | 8a1c38d17d88c8df3dcbea1c01a390ab2087f8ad (patch) | |
tree | 786527b3f4b3b7af13380fdc752f00898ebddf44 /drivers/net/bnx2x_main.c | |
parent | 748e543974eec6afb1f55f8430781150d0da8b0a (diff) | |
download | linux-8a1c38d17d88c8df3dcbea1c01a390ab2087f8ad.tar.gz linux-8a1c38d17d88c8df3dcbea1c01a390ab2087f8ad.tar.bz2 linux-8a1c38d17d88c8df3dcbea1c01a390ab2087f8ad.zip |
bnx2x: BW shaper enhancements
Some of the configuration can be set when loading the device and shouldn't be
re-calculated after each link up indication since it is not dependent on the
link speed
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bnx2x_main.c')
-rw-r--r-- | drivers/net/bnx2x_main.c | 314 |
1 files changed, 136 insertions, 178 deletions
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c index 891a3fb9fcf4..ce55e84c44da 100644 --- a/drivers/net/bnx2x_main.c +++ b/drivers/net/bnx2x_main.c @@ -2054,119 +2054,42 @@ static u8 bnx2x_link_test(struct bnx2x *bp) return rc; } -/* Calculates the sum of vn_min_rates. - It's needed for further normalizing of the min_rates. - - Returns: - sum of vn_min_rates - or - 0 - if all the min_rates are 0. - In the later case fairness algorithm should be deactivated. - If not all min_rates are zero then those that are zeroes will - be set to 1. - */ -static u32 bnx2x_calc_vn_wsum(struct bnx2x *bp) +static void bnx2x_init_port_minmax(struct bnx2x *bp) { - int i, port = BP_PORT(bp); - u32 wsum = 0; - int all_zero = 1; + u32 r_param = bp->link_vars.line_speed / 8; + u32 fair_periodic_timeout_usec; + u32 t_fair; - for (i = 0; i < E1HVN_MAX; i++) { - u32 vn_cfg = - SHMEM_RD(bp, mf_cfg.func_mf_config[2*i + port].config); - u32 vn_min_rate = ((vn_cfg & FUNC_MF_CFG_MIN_BW_MASK) >> - FUNC_MF_CFG_MIN_BW_SHIFT) * 100; - if (!(vn_cfg & FUNC_MF_CFG_FUNC_HIDE)) { - /* If min rate is zero - set it to 1 */ - if (!vn_min_rate) - vn_min_rate = DEF_MIN_RATE; - else - all_zero = 0; - - wsum += vn_min_rate; - } - } + memset(&(bp->cmng.rs_vars), 0, + sizeof(struct rate_shaping_vars_per_port)); + memset(&(bp->cmng.fair_vars), 0, sizeof(struct fairness_vars_per_port)); - /* ... only if all min rates are zeros - disable FAIRNESS */ - if (all_zero) - return 0; - - return wsum; -} - -static void bnx2x_init_port_minmax(struct bnx2x *bp, - int en_fness, - u16 port_rate, - struct cmng_struct_per_port *m_cmng_port) -{ - u32 r_param = port_rate / 8; - int port = BP_PORT(bp); - int i; - - memset(m_cmng_port, 0, sizeof(struct cmng_struct_per_port)); - - /* Enable minmax only if we are in e1hmf mode */ - if (IS_E1HMF(bp)) { - u32 fair_periodic_timeout_usec; - u32 t_fair; - - /* Enable rate shaping and fairness */ - m_cmng_port->flags.cmng_vn_enable = 1; - m_cmng_port->flags.fairness_enable = en_fness ? 1 : 0; - m_cmng_port->flags.rate_shaping_enable = 1; + /* 100 usec in SDM ticks = 25 since each tick is 4 usec */ + bp->cmng.rs_vars.rs_periodic_timeout = RS_PERIODIC_TIMEOUT_USEC / 4; - if (!en_fness) - DP(NETIF_MSG_IFUP, "All MIN values are zeroes" - " fairness will be disabled\n"); - - /* 100 usec in SDM ticks = 25 since each tick is 4 usec */ - m_cmng_port->rs_vars.rs_periodic_timeout = - RS_PERIODIC_TIMEOUT_USEC / 4; - - /* this is the threshold below which no timer arming will occur - 1.25 coefficient is for the threshold to be a little bigger - than the real time, to compensate for timer in-accuracy */ - m_cmng_port->rs_vars.rs_threshold = + /* this is the threshold below which no timer arming will occur + 1.25 coefficient is for the threshold to be a little bigger + than the real time, to compensate for timer in-accuracy */ + bp->cmng.rs_vars.rs_threshold = (RS_PERIODIC_TIMEOUT_USEC * r_param * 5) / 4; - /* resolution of fairness timer */ - fair_periodic_timeout_usec = QM_ARB_BYTES / r_param; - /* for 10G it is 1000usec. for 1G it is 10000usec. */ - t_fair = T_FAIR_COEF / port_rate; + /* resolution of fairness timer */ + fair_periodic_timeout_usec = QM_ARB_BYTES / r_param; + /* for 10G it is 1000usec. for 1G it is 10000usec. */ + t_fair = T_FAIR_COEF / bp->link_vars.line_speed; - /* this is the threshold below which we won't arm - the timer anymore */ - m_cmng_port->fair_vars.fair_threshold = QM_ARB_BYTES; - - /* we multiply by 1e3/8 to get bytes/msec. - We don't want the credits to pass a credit - of the T_FAIR*FAIR_MEM (algorithm resolution) */ - m_cmng_port->fair_vars.upper_bound = - r_param * t_fair * FAIR_MEM; - /* since each tick is 4 usec */ - m_cmng_port->fair_vars.fairness_timeout = - fair_periodic_timeout_usec / 4; - - } else { - /* Disable rate shaping and fairness */ - m_cmng_port->flags.cmng_vn_enable = 0; - m_cmng_port->flags.fairness_enable = 0; - m_cmng_port->flags.rate_shaping_enable = 0; + /* this is the threshold below which we won't arm the timer anymore */ + bp->cmng.fair_vars.fair_threshold = QM_ARB_BYTES; - DP(NETIF_MSG_IFUP, - "Single function mode minmax will be disabled\n"); - } - - /* Store it to internal memory */ - for (i = 0; i < sizeof(struct cmng_struct_per_port) / 4; i++) - REG_WR(bp, BAR_XSTRORM_INTMEM + - XSTORM_CMNG_PER_PORT_VARS_OFFSET(port) + i * 4, - ((u32 *)(m_cmng_port))[i]); + /* we multiply by 1e3/8 to get bytes/msec. + We don't want the credits to pass a credit + of the t_fair*FAIR_MEM (algorithm resolution) */ + bp->cmng.fair_vars.upper_bound = r_param * t_fair * FAIR_MEM; + /* since each tick is 4 usec */ + bp->cmng.fair_vars.fairness_timeout = fair_periodic_timeout_usec / 4; } -static void bnx2x_init_vn_minmax(struct bnx2x *bp, int func, - u32 wsum, u16 port_rate, - struct cmng_struct_per_port *m_cmng_port) +static void bnx2x_init_vn_minmax(struct bnx2x *bp, int func) { struct rate_shaping_vars_per_vn m_rs_vn; struct fairness_vars_per_vn m_fair_vn; @@ -2182,17 +2105,18 @@ static void bnx2x_init_vn_minmax(struct bnx2x *bp, int func, } else { vn_min_rate = ((vn_cfg & FUNC_MF_CFG_MIN_BW_MASK) >> FUNC_MF_CFG_MIN_BW_SHIFT) * 100; - /* If FAIRNESS is enabled (not all min rates are zeroes) and + /* If fairness is enabled (not all min rates are zeroes) and if current min rate is zero - set it to 1. This is a requirement of the algorithm. */ - if ((vn_min_rate == 0) && wsum) + if (bp->vn_weight_sum && (vn_min_rate == 0)) vn_min_rate = DEF_MIN_RATE; vn_max_rate = ((vn_cfg & FUNC_MF_CFG_MAX_BW_MASK) >> FUNC_MF_CFG_MAX_BW_SHIFT) * 100; } - DP(NETIF_MSG_IFUP, "func %d: vn_min_rate=%d vn_max_rate=%d " - "wsum=%d\n", func, vn_min_rate, vn_max_rate, wsum); + DP(NETIF_MSG_IFUP, + "func %d: vn_min_rate=%d vn_max_rate=%d vn_weight_sum=%d\n", + func, vn_min_rate, vn_max_rate, bp->vn_weight_sum); memset(&m_rs_vn, 0, sizeof(struct rate_shaping_vars_per_vn)); memset(&m_fair_vn, 0, sizeof(struct fairness_vars_per_vn)); @@ -2204,55 +2128,20 @@ static void bnx2x_init_vn_minmax(struct bnx2x *bp, int func, m_rs_vn.vn_counter.quota = (vn_max_rate * RS_PERIODIC_TIMEOUT_USEC) / 8; -#ifdef BNX2X_PER_PROT_QOS - /* per protocol counter */ - for (protocol = 0; protocol < NUM_OF_PROTOCOLS; protocol++) { - /* maximal Mbps for this protocol */ - m_rs_vn.protocol_counters[protocol].rate = - protocol_max_rate[protocol]; - /* the quota in each timer period - - number of bytes transmitted in this period */ - m_rs_vn.protocol_counters[protocol].quota = - (u32)(rs_periodic_timeout_usec * - ((double)m_rs_vn. - protocol_counters[protocol].rate/8)); - } -#endif - - if (wsum) { + if (bp->vn_weight_sum) { /* credit for each period of the fairness algorithm: number of bytes in T_FAIR (the vn share the port rate). - wsum should not be larger than 10000, thus - T_FAIR_COEF / (8 * wsum) will always be grater than zero */ + vn_weight_sum should not be larger than 10000, thus + T_FAIR_COEF / (8 * vn_weight_sum) will always be greater + than zero */ m_fair_vn.vn_credit_delta = - max((u64)(vn_min_rate * (T_FAIR_COEF / (8 * wsum))), - (u64)(m_cmng_port->fair_vars.fair_threshold * 2)); + max((u32)(vn_min_rate * (T_FAIR_COEF / + (8 * bp->vn_weight_sum))), + (u32)(bp->cmng.fair_vars.fair_threshold * 2)); DP(NETIF_MSG_IFUP, "m_fair_vn.vn_credit_delta=%d\n", m_fair_vn.vn_credit_delta); } -#ifdef BNX2X_PER_PROT_QOS - do { - u32 protocolWeightSum = 0; - - for (protocol = 0; protocol < NUM_OF_PROTOCOLS; protocol++) - protocolWeightSum += - drvInit.protocol_min_rate[protocol]; - /* per protocol counter - - NOT NEEDED IF NO PER-PROTOCOL CONGESTION MANAGEMENT */ - if (protocolWeightSum > 0) { - for (protocol = 0; - protocol < NUM_OF_PROTOCOLS; protocol++) - /* credit for each period of the - fairness algorithm - number of bytes in - T_FAIR (the protocol share the vn rate) */ - m_fair_vn.protocol_credit_delta[protocol] = - (u32)((vn_min_rate / 8) * t_fair * - protocol_min_rate / protocolWeightSum); - } - } while (0); -#endif - /* Store it to internal memory */ for (i = 0; i < sizeof(struct rate_shaping_vars_per_vn)/4; i++) REG_WR(bp, BAR_XSTRORM_INTMEM + @@ -2265,11 +2154,10 @@ static void bnx2x_init_vn_minmax(struct bnx2x *bp, int func, ((u32 *)(&m_fair_vn))[i]); } + /* This function is called upon link interrupt */ static void bnx2x_link_attn(struct bnx2x *bp) { - int vn; - /* Make sure that we are synced with the current statistics */ bnx2x_stats_handle(bp, STATS_EVENT_STOP); @@ -2294,36 +2182,38 @@ static void bnx2x_link_attn(struct bnx2x *bp) bnx2x_link_report(bp); if (IS_E1HMF(bp)) { + int port = BP_PORT(bp); int func; + int vn; for (vn = VN_0; vn < E1HVN_MAX; vn++) { if (vn == BP_E1HVN(bp)) continue; - func = ((vn << 1) | BP_PORT(bp)); + func = ((vn << 1) | port); /* Set the attention towards other drivers on the same port */ REG_WR(bp, MISC_REG_AEU_GENERAL_ATTN_0 + (LINK_SYNC_ATTENTION_BIT_FUNC_0 + func)*4, 1); } - } - if (CHIP_IS_E1H(bp) && (bp->link_vars.line_speed > 0)) { - struct cmng_struct_per_port m_cmng_port; - u32 wsum; - int port = BP_PORT(bp); + if (bp->link_vars.link_up) { + int i; + + /* Init rate shaping and fairness contexts */ + bnx2x_init_port_minmax(bp); - /* Init RATE SHAPING and FAIRNESS contexts */ - wsum = bnx2x_calc_vn_wsum(bp); - bnx2x_init_port_minmax(bp, (int)wsum, - bp->link_vars.line_speed, - &m_cmng_port); - if (IS_E1HMF(bp)) for (vn = VN_0; vn < E1HVN_MAX; vn++) - bnx2x_init_vn_minmax(bp, 2*vn + port, - wsum, bp->link_vars.line_speed, - &m_cmng_port); + bnx2x_init_vn_minmax(bp, 2*vn + port); + + /* Store it to internal memory */ + for (i = 0; + i < sizeof(struct cmng_struct_per_port) / 4; i++) + REG_WR(bp, BAR_XSTRORM_INTMEM + + XSTORM_CMNG_PER_PORT_VARS_OFFSET(port) + i*4, + ((u32 *)(&bp->cmng))[i]); + } } } @@ -4848,6 +4738,47 @@ static void bnx2x_init_internal_port(struct bnx2x *bp) REG_WR(bp, BAR_XSTRORM_INTMEM + XSTORM_HC_BTR_OFFSET(port), BNX2X_BTR); } +/* Calculates the sum of vn_min_rates. + It's needed for further normalizing of the min_rates. + Returns: + sum of vn_min_rates. + or + 0 - if all the min_rates are 0. + In the later case fainess algorithm should be deactivated. + If not all min_rates are zero then those that are zeroes will be set to 1. + */ +static void bnx2x_calc_vn_weight_sum(struct bnx2x *bp) +{ + int all_zero = 1; + int port = BP_PORT(bp); + int vn; + + bp->vn_weight_sum = 0; + for (vn = VN_0; vn < E1HVN_MAX; vn++) { + int func = 2*vn + port; + u32 vn_cfg = + SHMEM_RD(bp, mf_cfg.func_mf_config[func].config); + u32 vn_min_rate = ((vn_cfg & FUNC_MF_CFG_MIN_BW_MASK) >> + FUNC_MF_CFG_MIN_BW_SHIFT) * 100; + + /* Skip hidden vns */ + if (vn_cfg & FUNC_MF_CFG_FUNC_HIDE) + continue; + + /* If min rate is zero - set it to 1 */ + if (!vn_min_rate) + vn_min_rate = DEF_MIN_RATE; + else + all_zero = 0; + + bp->vn_weight_sum += vn_min_rate; + } + + /* ... only if all min rates are zeros - disable fairness */ + if (all_zero) + bp->vn_weight_sum = 0; +} + static void bnx2x_init_internal_func(struct bnx2x *bp) { struct tstorm_eth_function_common_config tstorm_config = {0}; @@ -4977,6 +4908,45 @@ static void bnx2x_init_internal_func(struct bnx2x *bp) USTORM_MAX_AGG_SIZE_OFFSET(port, FP_CL_ID(fp)), max_agg_size); } + + memset(&(bp->cmng), 0, sizeof(struct cmng_struct_per_port)); + + /* Init rate shaping and fairness contexts */ + if (IS_E1HMF(bp)) { + int vn; + + /* During init there is no active link + Until link is up, set link rate to 10Gbps */ + bp->link_vars.line_speed = SPEED_10000; + bnx2x_init_port_minmax(bp); + + bnx2x_calc_vn_weight_sum(bp); + + for (vn = VN_0; vn < E1HVN_MAX; vn++) + bnx2x_init_vn_minmax(bp, 2*vn + port); + + /* Enable rate shaping and fairness */ + bp->cmng.flags.cmng_enables = + CMNG_FLAGS_PER_PORT_RATE_SHAPING_VN; + if (bp->vn_weight_sum) + bp->cmng.flags.cmng_enables |= + CMNG_FLAGS_PER_PORT_FAIRNESS_VN; + else + DP(NETIF_MSG_IFUP, "All MIN values are zeroes" + " fairness will be disabled\n"); + } else { + /* rate shaping and fairness are disabled */ + DP(NETIF_MSG_IFUP, + "single function mode minmax will be disabled\n"); + } + + + /* Store it to internal memory */ + if (bp->port.pmf) + for (i = 0; i < sizeof(struct cmng_struct_per_port) / 4; i++) + REG_WR(bp, BAR_XSTRORM_INTMEM + + XSTORM_CMNG_PER_PORT_VARS_OFFSET(port) + i * 4, + ((u32 *)(&bp->cmng))[i]); } static void bnx2x_init_internal(struct bnx2x *bp, u32 load_code) @@ -5780,22 +5750,10 @@ static int bnx2x_init_port(struct bnx2x *bp) REG_WR(bp, NIG_REG_XGXS_SERDES0_MODE_SEL + port*4, 1); if (CHIP_IS_E1H(bp)) { - u32 wsum; - struct cmng_struct_per_port m_cmng_port; - int vn; - /* 0x2 disable e1hov, 0x1 enable */ REG_WR(bp, NIG_REG_LLH0_BRB1_DRV_MASK_MF + port*4, (IS_E1HMF(bp) ? 0x1 : 0x2)); - /* Init RATE SHAPING and FAIRNESS contexts. - Initialize as if there is 10G link. */ - wsum = bnx2x_calc_vn_wsum(bp); - bnx2x_init_port_minmax(bp, (int)wsum, 10000, &m_cmng_port); - if (IS_E1HMF(bp)) - for (vn = VN_0; vn < E1HVN_MAX; vn++) - bnx2x_init_vn_minmax(bp, 2*vn + port, - wsum, 10000, &m_cmng_port); } /* Port MCP comes here */ |