#if defined(CONFIG_DCB)
#define BCM_DCBNL
#endif
+
+
+#include "bnx2x_hsi.h"
+
#if defined(CONFIG_CNIC) || defined(CONFIG_CNIC_MODULE)
#define BCM_CNIC 1
#include "../cnic_if.h"
struct bnx2x_common common;
struct bnx2x_port port;
- struct cmng_struct_per_port cmng;
- u32 vn_weight_sum;
+ struct cmng_init cmng;
+
u32 mf_config[E1HVN_MAX];
u32 mf2_config[E2_FUNC_MAX];
u32 path_has_ovlan; /* E3 */
/************************* Init ******************************************/
+/* returns func by VN for current port */
+static inline int func_by_vn(struct bnx2x *bp, int vn)
+{
+ return 2 * vn + BP_PORT(bp);
+}
+
/**
* bnx2x_func_start - init function
*
}
static inline void storm_memset_cmng(struct bnx2x *bp,
- struct cmng_struct_per_port *cmng,
+ struct cmng_init *cmng,
u8 port)
{
+ int vn;
size_t size = sizeof(struct cmng_struct_per_port);
u32 addr = BAR_XSTRORM_INTMEM +
XSTORM_CMNG_PER_PORT_VARS_OFFSET(port);
- __storm_memset_struct(bp, addr, size, (u32 *)cmng);
+ __storm_memset_struct(bp, addr, size, (u32 *)&cmng->port);
+
+ for (vn = VN_0; vn < BP_MAX_VN_NUM(bp); vn++) {
+ int func = func_by_vn(bp, vn);
+
+ addr = BAR_XSTRORM_INTMEM +
+ XSTORM_RATE_SHAPING_PER_VN_VARS_OFFSET(func);
+ size = sizeof(struct rate_shaping_vars_per_vn);
+ __storm_memset_struct(bp, addr, size,
+ (u32 *)&cmng->vnic.vnic_max_rate[vn]);
+
+ addr = BAR_XSTRORM_INTMEM +
+ XSTORM_FAIRNESS_PER_VN_VARS_OFFSET(func);
+ size = sizeof(struct fairness_vars_per_vn);
+ __storm_memset_struct(bp, addr, size,
+ (u32 *)&cmng->vnic.vnic_min_rate[vn]);
+ }
}
/**
*/
void bnx2x_get_iscsi_info(struct bnx2x *bp);
#endif
-/* returns func by VN for current port */
-static inline int func_by_vn(struct bnx2x *bp, int vn)
-{
- return 2 * vn + BP_PORT(bp);
-}
/**
* bnx2x_link_sync_notify - send notification to other functions.
struct cmng_flags_per_port flags;
};
+/*
+ * a single rate shaping counter. can be used as protocol or vnic counter
+ */
+struct rate_shaping_counter {
+ u32 quota;
+#if defined(__BIG_ENDIAN)
+ u16 __reserved0;
+ u16 rate;
+#elif defined(__LITTLE_ENDIAN)
+ u16 rate;
+ u16 __reserved0;
+#endif
+};
+
+/*
+ * per-vnic rate shaping variables
+ */
+struct rate_shaping_vars_per_vn {
+ struct rate_shaping_counter vn_counter;
+};
+
+/*
+ * per-vnic fairness variables
+ */
+struct fairness_vars_per_vn {
+ u32 cos_credit_delta[MAX_COS_NUMBER];
+ u32 vn_credit_delta;
+ u32 __reserved0;
+};
+
+/*
+ * cmng port init state
+ */
+struct cmng_vnic {
+ struct rate_shaping_vars_per_vn vnic_max_rate[4];
+ struct fairness_vars_per_vn vnic_min_rate[4];
+};
+
+/*
+ * cmng port init state
+ */
+struct cmng_init {
+ struct cmng_struct_per_port port;
+ struct cmng_vnic vnic;
+};
+
+
+/*
+ * driver parameters for congestion management init, all rates are in Mbps
+ */
+struct cmng_init_input {
+ u32 port_rate;
+ u16 vnic_min_rate[4];
+ u16 vnic_max_rate[4];
+ u16 cos_min_rate[MAX_COS_NUMBER];
+ u16 cos_to_pause_mask[MAX_COS_NUMBER];
+ struct cmng_flags_per_port flags;
+};
+
/*
* Protocol-common command ID for slow path elements
};
-/*
- * per-vnic fairness variables
- */
-struct fairness_vars_per_vn {
- u32 cos_credit_delta[MAX_COS_NUMBER];
- u32 vn_credit_delta;
- u32 __reserved0;
-};
-
-
/*
* Priority and cos
*/
};
-/*
- * a single rate shaping counter. can be used as protocol or vnic counter
- */
-struct rate_shaping_counter {
- u32 quota;
-#if defined(__BIG_ENDIAN)
- u16 __reserved0;
- u16 rate;
-#elif defined(__LITTLE_ENDIAN)
- u16 rate;
- u16 __reserved0;
-#endif
-};
-
-
-/*
- * per-vnic rate shaping variables
- */
-struct rate_shaping_vars_per_vn {
- struct rate_shaping_counter vn_counter;
-};
-
-
/*
* The send queue element
*/
REG_WR(bp, reg_addr, reg_bit_map | q_bit_map);
/* set/clear queue bit in command-queue bit map
- (E2/E3A0 only, valid COS values are 0/1) */
+ * (E2/E3A0 only, valid COS values are 0/1)
+ */
if (!(INIT_MODE_FLAGS(bp) & MODE_E3_B0)) {
reg_addr = BNX2X_Q_CMDQ_REG_ADDR(pf_q_num);
reg_bit_map = REG_RD(bp, reg_addr);
}
-/* Returns the index of start or end of a specific block stage in ops array*/
+/* congestion managment port init api description
+ * the api works as follows:
+ * the driver should pass the cmng_init_input struct, the port_init function
+ * will prepare the required internal ram structure which will be passed back
+ * to the driver (cmng_init) that will write it into the internal ram.
+ *
+ * IMPORTANT REMARKS:
+ * 1. the cmng_init struct does not represent the contiguous internal ram
+ * structure. the driver should use the XSTORM_CMNG_PERPORT_VARS_OFFSET
+ * offset in order to write the port sub struct and the
+ * PFID_FROM_PORT_AND_VNIC offset for writing the vnic sub struct (in other
+ * words - don't use memcpy!).
+ * 2. although the cmng_init struct is filled for the maximal vnic number
+ * possible, the driver should only write the valid vnics into the internal
+ * ram according to the appropriate port mode.
+ */
+#define BITS_TO_BYTES(x) ((x)/8)
+
+/* CMNG constants, as derived from system spec calculations */
+
+/* default MIN rate in case VNIC min rate is configured to zero- 100Mbps */
+#define DEF_MIN_RATE 100
+
+/* resolution of the rate shaping timer - 400 usec */
+#define RS_PERIODIC_TIMEOUT_USEC 400
+
+/* number of bytes in single QM arbitration cycle -
+ * coefficient for calculating the fairness timer
+ */
+#define QM_ARB_BYTES 160000
+
+/* resolution of Min algorithm 1:100 */
+#define MIN_RES 100
+
+/* how many bytes above threshold for
+ * the minimal credit of Min algorithm
+ */
+#define MIN_ABOVE_THRESH 32768
+
+/* Fairness algorithm integration time coefficient -
+ * for calculating the actual Tfair
+ */
+#define T_FAIR_COEF ((MIN_ABOVE_THRESH + QM_ARB_BYTES) * 8 * MIN_RES)
+
+/* Memory of fairness algorithm - 2 cycles */
+#define FAIR_MEM 2
+#define SAFC_TIMEOUT_USEC 52
+
+#define SDM_TICKS 4
+
+
+static inline void bnx2x_init_max(const struct cmng_init_input *input_data,
+ u32 r_param, struct cmng_init *ram_data)
+{
+ u32 vnic;
+ struct cmng_vnic *vdata = &ram_data->vnic;
+ struct cmng_struct_per_port *pdata = &ram_data->port;
+ /* rate shaping per-port variables
+ * 100 micro seconds in SDM ticks = 25
+ * since each tick is 4 microSeconds
+ */
+
+ pdata->rs_vars.rs_periodic_timeout =
+ RS_PERIODIC_TIMEOUT_USEC / SDM_TICKS;
+
+ /* this is the threshold below which no timer arming will occur.
+ * 1.25 coefficient is for the threshold to be a little bigger
+ * then the real time to compensate for timer in-accuracy
+ */
+ pdata->rs_vars.rs_threshold =
+ (5 * RS_PERIODIC_TIMEOUT_USEC * r_param)/4;
+
+ /* rate shaping per-vnic variables */
+ for (vnic = 0; vnic < BNX2X_PORT2_MODE_NUM_VNICS; vnic++) {
+ /* global vnic counter */
+ vdata->vnic_max_rate[vnic].vn_counter.rate =
+ input_data->vnic_max_rate[vnic];
+ /* maximal Mbps for this vnic
+ * the quota in each timer period - number of bytes
+ * transmitted in this period
+ */
+ vdata->vnic_max_rate[vnic].vn_counter.quota =
+ RS_PERIODIC_TIMEOUT_USEC *
+ (u32)vdata->vnic_max_rate[vnic].vn_counter.rate / 8;
+ }
+
+}
+
+static inline void bnx2x_init_min(const struct cmng_init_input *input_data,
+ u32 r_param, struct cmng_init *ram_data)
+{
+ u32 vnic, fair_periodic_timeout_usec, vnicWeightSum, tFair;
+ struct cmng_vnic *vdata = &ram_data->vnic;
+ struct cmng_struct_per_port *pdata = &ram_data->port;
+
+ /* this is the resolution of the fairness timer */
+ fair_periodic_timeout_usec = QM_ARB_BYTES / r_param;
+
+ /* fairness per-port variables
+ * for 10G it is 1000usec. for 1G it is 10000usec.
+ */
+ tFair = T_FAIR_COEF / input_data->port_rate;
+
+ /* this is the threshold below which we won't arm the timer anymore */
+ pdata->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)
+ */
+ pdata->fair_vars.upper_bound = r_param * tFair * FAIR_MEM;
+
+ /* since each tick is 4 microSeconds */
+ pdata->fair_vars.fairness_timeout =
+ fair_periodic_timeout_usec / SDM_TICKS;
+
+ /* calculate sum of weights */
+ vnicWeightSum = 0;
+
+ for (vnic = 0; vnic < BNX2X_PORT2_MODE_NUM_VNICS; vnic++)
+ vnicWeightSum += input_data->vnic_min_rate[vnic];
+
+ /* global vnic counter */
+ if (vnicWeightSum > 0) {
+ /* fairness per-vnic variables */
+ for (vnic = 0; vnic < BNX2X_PORT2_MODE_NUM_VNICS; vnic++) {
+ /* this is the credit for each period of the fairness
+ * algorithm - number of bytes in T_FAIR (this vnic
+ * share of the port rate)
+ */
+ vdata->vnic_min_rate[vnic].vn_credit_delta =
+ (u32)input_data->vnic_min_rate[vnic] * 100 *
+ T_FAIR_COEF / (8 * 100 * vnicWeightSum);
+ if (vdata->vnic_min_rate[vnic].vn_credit_delta <
+ pdata->fair_vars.fair_threshold +
+ MIN_ABOVE_THRESH) {
+ vdata->vnic_min_rate[vnic].vn_credit_delta =
+ pdata->fair_vars.fair_threshold +
+ MIN_ABOVE_THRESH;
+ }
+ }
+ }
+}
+
+static inline void bnx2x_init_fw_wrr(const struct cmng_init_input *input_data,
+ u32 r_param, struct cmng_init *ram_data)
+{
+ u32 vnic, cos;
+ u32 cosWeightSum = 0;
+ struct cmng_vnic *vdata = &ram_data->vnic;
+ struct cmng_struct_per_port *pdata = &ram_data->port;
+
+ for (cos = 0; cos < MAX_COS_NUMBER; cos++)
+ cosWeightSum += input_data->cos_min_rate[cos];
+
+ if (cosWeightSum > 0) {
+
+ for (vnic = 0; vnic < BNX2X_PORT2_MODE_NUM_VNICS; vnic++) {
+ /* Since cos and vnic shouldn't work together the rate
+ * to divide between the coses is the port rate.
+ */
+ u32 *ccd = vdata->vnic_min_rate[vnic].cos_credit_delta;
+ for (cos = 0; cos < MAX_COS_NUMBER; cos++) {
+ /* this is the credit for each period of
+ * the fairness algorithm - number of bytes
+ * in T_FAIR (this cos share of the vnic rate)
+ */
+ ccd[cos] =
+ (u32)input_data->cos_min_rate[cos] * 100 *
+ T_FAIR_COEF / (8 * 100 * cosWeightSum);
+ if (ccd[cos] < pdata->fair_vars.fair_threshold
+ + MIN_ABOVE_THRESH) {
+ ccd[cos] =
+ pdata->fair_vars.fair_threshold +
+ MIN_ABOVE_THRESH;
+ }
+ }
+ }
+ }
+}
+
+static inline void bnx2x_init_safc(const struct cmng_init_input *input_data,
+ struct cmng_init *ram_data)
+{
+ /* in microSeconds */
+ ram_data->port.safc_vars.safc_timeout_usec = SAFC_TIMEOUT_USEC;
+}
+
+/* Congestion management port init */
+static inline void bnx2x_init_cmng(const struct cmng_init_input *input_data,
+ struct cmng_init *ram_data)
+{
+ u32 r_param;
+ memset(ram_data, 0, sizeof(struct cmng_init));
+
+ ram_data->port.flags = input_data->flags;
+
+ /* number of bytes transmitted in a rate of 10Gbps
+ * in one usec = 1.25KB.
+ */
+ r_param = BITS_TO_BYTES(input_data->port_rate);
+ bnx2x_init_max(input_data, r_param, ram_data);
+ bnx2x_init_min(input_data, r_param, ram_data);
+ bnx2x_init_fw_wrr(input_data, r_param, ram_data);
+ bnx2x_init_safc(input_data, ram_data);
+}
+
+
+
+/* Returns the index of start or end of a specific block stage in ops array */
#define BLOCK_OPS_IDX(block, stage, end) \
(2*(((block)*NUM_OF_INIT_PHASES) + (stage)) + (end))
bnx2x_set_mcp_parity(bp, false);
}
-/**
- * Clear the parity error status registers.
- */
+/* Clear the parity error status registers. */
static inline void bnx2x_clear_blocks_parity(struct bnx2x *bp)
{
int i;
return rc;
}
-static void bnx2x_init_port_minmax(struct bnx2x *bp)
-{
- u32 r_param = bp->link_vars.line_speed / 8;
- u32 fair_periodic_timeout_usec;
- u32 t_fair;
-
- 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));
-
- /* 100 usec in SDM ticks = 25 since each tick is 4 usec */
- bp->cmng.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 */
- 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 / bp->link_vars.line_speed;
-
- /* this is the threshold below which we won't arm the timer anymore */
- bp->cmng.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) */
- 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;
-}
/* Calculates the sum of vn_min_rates.
It's needed for further normalizing of the min_rates.
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)
+static void bnx2x_calc_vn_min(struct bnx2x *bp,
+ struct cmng_init_input *input)
{
int all_zero = 1;
int vn;
- bp->vn_weight_sum = 0;
for (vn = VN_0; vn < BP_MAX_VN_NUM(bp); vn++) {
u32 vn_cfg = bp->mf_config[vn];
u32 vn_min_rate = ((vn_cfg & FUNC_MF_CFG_MIN_BW_MASK) >>
/* Skip hidden vns */
if (vn_cfg & FUNC_MF_CFG_FUNC_HIDE)
- continue;
-
+ vn_min_rate = 0;
/* If min rate is zero - set it to 1 */
- if (!vn_min_rate)
+ else if (!vn_min_rate)
vn_min_rate = DEF_MIN_RATE;
else
all_zero = 0;
- bp->vn_weight_sum += vn_min_rate;
+ input->vnic_min_rate[vn] = vn_min_rate;
}
/* if ETS or all min rates are zeros - disable fairness */
if (BNX2X_IS_ETS_ENABLED(bp)) {
- bp->cmng.flags.cmng_enables &=
+ input->flags.cmng_enables &=
~CMNG_FLAGS_PER_PORT_FAIRNESS_VN;
DP(NETIF_MSG_IFUP, "Fairness will be disabled due to ETS\n");
} else if (all_zero) {
- bp->cmng.flags.cmng_enables &=
+ input->flags.cmng_enables &=
~CMNG_FLAGS_PER_PORT_FAIRNESS_VN;
- DP(NETIF_MSG_IFUP, "All MIN values are zeroes"
- " fairness will be disabled\n");
+ DP(NETIF_MSG_IFUP,
+ "All MIN values are zeroes fairness will be disabled\n");
} else
- bp->cmng.flags.cmng_enables |=
+ input->flags.cmng_enables |=
CMNG_FLAGS_PER_PORT_FAIRNESS_VN;
}
-static void bnx2x_init_vn_minmax(struct bnx2x *bp, int vn)
+static void bnx2x_calc_vn_max(struct bnx2x *bp, int vn,
+ struct cmng_init_input *input)
{
- struct rate_shaping_vars_per_vn m_rs_vn;
- struct fairness_vars_per_vn m_fair_vn;
+ u16 vn_max_rate;
u32 vn_cfg = bp->mf_config[vn];
- int func = func_by_vn(bp, vn);
- u16 vn_min_rate, vn_max_rate;
- int i;
- /* If function is hidden - set min and max to zeroes */
- if (vn_cfg & FUNC_MF_CFG_FUNC_HIDE) {
- vn_min_rate = 0;
+ if (vn_cfg & FUNC_MF_CFG_FUNC_HIDE)
vn_max_rate = 0;
-
- } else {
+ else {
u32 maxCfg = bnx2x_extract_max_cfg(bp, vn_cfg);
- 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 current min rate is zero - set it to 1.
- This is a requirement of the algorithm. */
- if (bp->vn_weight_sum && (vn_min_rate == 0))
- vn_min_rate = DEF_MIN_RATE;
-
- if (IS_MF_SI(bp))
+ if (IS_MF_SI(bp)) {
/* maxCfg in percents of linkspeed */
vn_max_rate = (bp->link_vars.line_speed * maxCfg) / 100;
- else
+ } else /* SD modes */
/* maxCfg is absolute in 100Mb units */
vn_max_rate = maxCfg * 100;
}
- 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));
-
- /* global vn counter - maximal Mbps for this vn */
- m_rs_vn.vn_counter.rate = vn_max_rate;
-
- /* quota - number of bytes transmitted in this period */
- m_rs_vn.vn_counter.quota =
- (vn_max_rate * RS_PERIODIC_TIMEOUT_USEC) / 8;
-
- 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).
- 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_t(u32, (vn_min_rate * (T_FAIR_COEF /
- (8 * bp->vn_weight_sum))),
- (bp->cmng.fair_vars.fair_threshold +
- MIN_ABOVE_THRESH));
- DP(NETIF_MSG_IFUP, "m_fair_vn.vn_credit_delta %d\n",
- m_fair_vn.vn_credit_delta);
- }
-
- /* Store it to internal memory */
- for (i = 0; i < sizeof(struct rate_shaping_vars_per_vn)/4; i++)
- REG_WR(bp, BAR_XSTRORM_INTMEM +
- XSTORM_RATE_SHAPING_PER_VN_VARS_OFFSET(func) + i * 4,
- ((u32 *)(&m_rs_vn))[i]);
-
- for (i = 0; i < sizeof(struct fairness_vars_per_vn)/4; i++)
- REG_WR(bp, BAR_XSTRORM_INTMEM +
- XSTORM_FAIRNESS_PER_VN_VARS_OFFSET(func) + i * 4,
- ((u32 *)(&m_fair_vn))[i]);
+ DP(NETIF_MSG_IFUP, "vn %d: vn_max_rate %d\n", vn, vn_max_rate);
+
+ input->vnic_max_rate[vn] = vn_max_rate;
}
+
static int bnx2x_get_cmng_fns_mode(struct bnx2x *bp)
{
if (CHIP_REV_IS_SLOW(bp))
static void bnx2x_cmng_fns_init(struct bnx2x *bp, u8 read_cfg, u8 cmng_type)
{
+ struct cmng_init_input input;
+ memset(&input, 0, sizeof(struct cmng_init_input));
+
+ input.port_rate = bp->link_vars.line_speed;
if (cmng_type == CMNG_FNS_MINMAX) {
int vn;
- /* clear cmng_enables */
- bp->cmng.flags.cmng_enables = 0;
-
/* read mf conf from shmem */
if (read_cfg)
bnx2x_read_mf_cfg(bp);
- /* Init rate shaping and fairness contexts */
- bnx2x_init_port_minmax(bp);
-
/* vn_weight_sum and enable fairness if not 0 */
- bnx2x_calc_vn_weight_sum(bp);
+ bnx2x_calc_vn_min(bp, &input);
/* calculate and set min-max rate for each vn */
if (bp->port.pmf)
for (vn = VN_0; vn < BP_MAX_VN_NUM(bp); vn++)
- bnx2x_init_vn_minmax(bp, vn);
+ bnx2x_calc_vn_max(bp, vn, &input);
/* always enable rate shaping and fairness */
- bp->cmng.flags.cmng_enables |=
+ input.flags.cmng_enables |=
CMNG_FLAGS_PER_PORT_RATE_SHAPING_VN;
- if (!bp->vn_weight_sum)
- DP(NETIF_MSG_IFUP, "All MIN values are zeroes"
- " fairness will be disabled\n");
+
+ bnx2x_init_cmng(&input, &bp->cmng);
return;
}
git.openpandora.org / pandora-kernel.git / commitdiff