/** * ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter * @hw: pointer to hardware structure * @refill: refill credits index by traffic class * @max: max credits index by traffic class * @bwg_id: bandwidth grouping indexed by traffic class * @prio_type: priority type indexed by traffic class * @prio_tc: priority to tc assignments indexed by priority * * Configure Rx Packet Arbiter and credits for each traffic class.
*/ int ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw,
u16 *refill,
u16 *max,
u8 *bwg_id,
u8 *prio_type,
u8 *prio_tc)
{
u32 reg = 0;
u32 credit_refill = 0;
u32 credit_max = 0;
u8 i = 0;
/* Map all traffic classes to their UP */
reg = 0; for (i = 0; i < MAX_USER_PRIORITY; i++)
reg |= (prio_tc[i] << (i * IXGBE_RTRUP2TC_UP_SHIFT));
IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
/* Configure traffic class credits and priority */ for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
credit_refill = refill[i];
credit_max = max[i];
reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT);
/** * ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter * @hw: pointer to hardware structure * @refill: refill credits index by traffic class * @max: max credits index by traffic class * @bwg_id: bandwidth grouping indexed by traffic class * @prio_type: priority type indexed by traffic class * * Configure Tx Descriptor Arbiter and credits for each traffic class.
*/ int ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw,
u16 *refill,
u16 *max,
u8 *bwg_id,
u8 *prio_type)
{
u32 reg, max_credits;
u8 i;
/* Clear the per-Tx queue credits; we use per-TC instead */ for (i = 0; i < 128; i++) {
IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
IXGBE_WRITE_REG(hw, IXGBE_RTTDT1C, 0);
}
/* Configure traffic class credits and priority */ for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
max_credits = max[i];
reg = max_credits << IXGBE_RTTDT2C_MCL_SHIFT;
reg |= refill[i];
reg |= (u32)(bwg_id[i]) << IXGBE_RTTDT2C_BWG_SHIFT;
if (prio_type[i] == prio_group)
reg |= IXGBE_RTTDT2C_GSP;
if (prio_type[i] == prio_link)
reg |= IXGBE_RTTDT2C_LSP;
/** * ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter * @hw: pointer to hardware structure * @refill: refill credits index by traffic class * @max: max credits index by traffic class * @bwg_id: bandwidth grouping indexed by traffic class * @prio_type: priority type indexed by traffic class * @prio_tc: priority to tc assignments indexed by priority * * Configure Tx Packet Arbiter and credits for each traffic class.
*/ int ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw,
u16 *refill,
u16 *max,
u8 *bwg_id,
u8 *prio_type,
u8 *prio_tc)
{
u32 reg;
u8 i;
/* Map all traffic classes to their UP */
reg = 0; for (i = 0; i < MAX_USER_PRIORITY; i++)
reg |= (prio_tc[i] << (i * IXGBE_RTTUP2TC_UP_SHIFT));
IXGBE_WRITE_REG(hw, IXGBE_RTTUP2TC, reg);
/* Configure traffic class credits and priority */ for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
reg = refill[i];
reg |= (u32)(max[i]) << IXGBE_RTTPT2C_MCL_SHIFT;
reg |= (u32)(bwg_id[i]) << IXGBE_RTTPT2C_BWG_SHIFT;
if (prio_type[i] == prio_group)
reg |= IXGBE_RTTPT2C_GSP;
if (prio_type[i] == prio_link)
reg |= IXGBE_RTTPT2C_LSP;
/* * X540 & X550 supports per TC Rx priority flow control. * So clear all TCs and only enable those that should be * enabled.
*/
reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
if (hw->mac.type >= ixgbe_mac_X540)
reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
if (pfc_en)
reg |= IXGBE_MFLCN_RPFCE;
IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
for (i = 0; i < MAX_USER_PRIORITY; i++) { if (prio_tc[i] > max_tc)
max_tc = prio_tc[i];
}
/* Configure PFC Tx thresholds per TC */ for (i = 0; i <= max_tc; i++) { int enabled = 0;
if (enabled) {
reg = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE;
IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
} else { /* In order to prevent Tx hangs when the internal Tx * switch is enabled we must set the high water mark * to the Rx packet buffer size - 24KB. This allows * the Tx switch to function even under heavy Rx * workloads.
*/
reg = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 24576;
IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
}
IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
}
for (; i < MAX_TRAFFIC_CLASS; i++) {
IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
}
/* Configure pause time (2 TCs per register) */
reg = hw->fc.pause_time * 0x00010001; for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
/* Configure flow control refresh threshold value */
IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
return 0;
}
/** * ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics * @hw: pointer to hardware structure * * Configure queue statistics registers, all queues belonging to same traffic * class uses a single set of queue statistics counters.
*/ staticint ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw)
{
u32 reg = 0;
u8 i = 0;
/* * Receive Queues stats setting * 32 RQSMR registers, each configuring 4 queues. * Set all 16 queues of each TC to the same stat * with TC 'n' going to stat 'n'.
*/ for (i = 0; i < 32; i++) {
reg = 0x01010101 * (i / 4);
IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
} /* * Transmit Queues stats setting * 32 TQSM registers, each controlling 4 queues. * Set all queues of each TC to the same stat * with TC 'n' going to stat 'n'. * Tx queues are allocated non-uniformly to TCs: * 32, 32, 16, 16, 8, 8, 8, 8.
*/ for (i = 0; i < 32; i++) { if (i < 8)
reg = 0x00000000; elseif (i < 16)
reg = 0x01010101; elseif (i < 20)
reg = 0x02020202; elseif (i < 24)
reg = 0x03030303; elseif (i < 26)
reg = 0x04040404; elseif (i < 28)
reg = 0x05050505; elseif (i < 30)
reg = 0x06060606; else
reg = 0x07070707;
IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
}
return 0;
}
/** * ixgbe_dcb_hw_config_82599 - Configure and enable DCB * @hw: pointer to hardware structure * @pfc_en: enabled pfc bitmask * @refill: refill credits index by traffic class * @max: max credits index by traffic class * @bwg_id: bandwidth grouping indexed by traffic class * @prio_type: priority type indexed by traffic class * @prio_tc: priority to tc assignments indexed by priority * * Configure dcb settings and enable dcb mode.
*/ int ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw, u8 pfc_en, u16 *refill,
u16 *max, u8 *bwg_id, u8 *prio_type, u8 *prio_tc)
{
ixgbe_dcb_config_rx_arbiter_82599(hw, refill, max, bwg_id,
prio_type, prio_tc);
ixgbe_dcb_config_tx_desc_arbiter_82599(hw, refill, max,
bwg_id, prio_type);
ixgbe_dcb_config_tx_data_arbiter_82599(hw, refill, max,
bwg_id, prio_type, prio_tc);
ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
ixgbe_dcb_config_tc_stats_82599(hw);
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