diff options
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_dcb_82599.c')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_dcb_82599.c | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/ixgbe_dcb_82599.c b/drivers/net/ixgbe/ixgbe_dcb_82599.c new file mode 100644 index 000000000000..470b676c1dae --- /dev/null +++ b/drivers/net/ixgbe/ixgbe_dcb_82599.c @@ -0,0 +1,467 @@ +/******************************************************************************* + + Intel 10 Gigabit PCI Express Linux driver + Copyright(c) 1999 - 2009 Intel Corporation. + + This program is free software; you can redistribute it and/or modify it + under the terms and conditions of the GNU General Public License, + version 2, as published by the Free Software Foundation. + + This program is distributed in the hope it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. + + You should have received a copy of the GNU General Public License along with + this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + + The full GNU General Public License is included in this distribution in + the file called "COPYING". + + Contact Information: + e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> + Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + +*******************************************************************************/ + +#include "ixgbe.h" +#include "ixgbe_type.h" +#include "ixgbe_dcb.h" +#include "ixgbe_dcb_82599.h" + +/** + * ixgbe_dcb_get_tc_stats_82599 - Returns status for each traffic class + * @hw: pointer to hardware structure + * @stats: pointer to statistics structure + * @tc_count: Number of elements in bwg_array. + * + * This function returns the status data for each of the Traffic Classes in use. + */ +s32 ixgbe_dcb_get_tc_stats_82599(struct ixgbe_hw *hw, + struct ixgbe_hw_stats *stats, + u8 tc_count) +{ + int tc; + + if (tc_count > MAX_TRAFFIC_CLASS) + return DCB_ERR_PARAM; + /* Statistics pertaining to each traffic class */ + for (tc = 0; tc < tc_count; tc++) { + /* Transmitted Packets */ + stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc)); + /* Transmitted Bytes */ + stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC(tc)); + /* Received Packets */ + stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc)); + /* Received Bytes */ + stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc)); + } + + return 0; +} + +/** + * ixgbe_dcb_get_pfc_stats_82599 - Return CBFC status data + * @hw: pointer to hardware structure + * @stats: pointer to statistics structure + * @tc_count: Number of elements in bwg_array. + * + * This function returns the CBFC status data for each of the Traffic Classes. + */ +s32 ixgbe_dcb_get_pfc_stats_82599(struct ixgbe_hw *hw, + struct ixgbe_hw_stats *stats, + u8 tc_count) +{ + int tc; + + if (tc_count > MAX_TRAFFIC_CLASS) + return DCB_ERR_PARAM; + for (tc = 0; tc < tc_count; tc++) { + /* Priority XOFF Transmitted */ + stats->pxofftxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(tc)); + /* Priority XOFF Received */ + stats->pxoffrxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(tc)); + } + + return 0; +} + +/** + * ixgbe_dcb_config_packet_buffers_82599 - Configure DCB packet buffers + * @hw: pointer to hardware structure + * @dcb_config: pointer to ixgbe_dcb_config structure + * + * Configure packet buffers for DCB mode. + */ +s32 ixgbe_dcb_config_packet_buffers_82599(struct ixgbe_hw *hw, + struct ixgbe_dcb_config *dcb_config) +{ + s32 ret_val = 0; + u32 value = IXGBE_RXPBSIZE_64KB; + u8 i = 0; + + /* Setup Rx packet buffer sizes */ + switch (dcb_config->rx_pba_cfg) { + case pba_80_48: + /* Setup the first four at 80KB */ + value = IXGBE_RXPBSIZE_80KB; + for (; i < 4; i++) + IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value); + /* Setup the last four at 48KB...don't re-init i */ + value = IXGBE_RXPBSIZE_48KB; + /* Fall Through */ + case pba_equal: + default: + for (; i < IXGBE_MAX_PACKET_BUFFERS; i++) + IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value); + + /* Setup Tx packet buffer sizes */ + for (i = 0; i < IXGBE_MAX_PACKET_BUFFERS; i++) { + IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i), + IXGBE_TXPBSIZE_20KB); + IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i), + IXGBE_TXPBTHRESH_DCB); + } + break; + } + + return ret_val; +} + +/** + * ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter + * @hw: pointer to hardware structure + * @dcb_config: pointer to ixgbe_dcb_config structure + * + * Configure Rx Packet Arbiter and credits for each traffic class. + */ +s32 ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw, + struct ixgbe_dcb_config *dcb_config) +{ + struct tc_bw_alloc *p; + u32 reg = 0; + u32 credit_refill = 0; + u32 credit_max = 0; + u8 i = 0; + + /* Disable the arbiter before changing parameters */ + IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, IXGBE_RTRPCS_ARBDIS); + + /* Map all traffic classes to their UP, 1 to 1 */ + reg = 0; + for (i = 0; i < MAX_TRAFFIC_CLASS; i++) + reg |= (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++) { + p = &dcb_config->tc_config[i].path[DCB_RX_CONFIG]; + + credit_refill = p->data_credits_refill; + credit_max = p->data_credits_max; + reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT); + + reg |= (u32)(p->bwg_id) << IXGBE_RTRPT4C_BWG_SHIFT; + + if (p->prio_type == prio_link) + reg |= IXGBE_RTRPT4C_LSP; + + IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg); + } + + /* + * Configure Rx packet plane (recycle mode; WSP) and + * enable arbiter + */ + reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC; + IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg); + + return 0; +} + +/** + * ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter + * @hw: pointer to hardware structure + * @dcb_config: pointer to ixgbe_dcb_config structure + * + * Configure Tx Descriptor Arbiter and credits for each traffic class. + */ +s32 ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw, + struct ixgbe_dcb_config *dcb_config) +{ + struct tc_bw_alloc *p; + u32 reg, max_credits; + u8 i; + + /* Disable the arbiter before changing parameters */ + IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, IXGBE_RTTDCS_ARBDIS); + + /* 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++) { + p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG]; + max_credits = dcb_config->tc_config[i].desc_credits_max; + reg = max_credits << IXGBE_RTTDT2C_MCL_SHIFT; + reg |= p->data_credits_refill; + reg |= (u32)(p->bwg_id) << IXGBE_RTTDT2C_BWG_SHIFT; + + if (p->prio_type == prio_group) + reg |= IXGBE_RTTDT2C_GSP; + + if (p->prio_type == prio_link) + reg |= IXGBE_RTTDT2C_LSP; + + IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg); + } + + /* + * Configure Tx descriptor plane (recycle mode; WSP) and + * enable arbiter + */ + reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM; + IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg); + + return 0; +} + +/** + * ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter + * @hw: pointer to hardware structure + * @dcb_config: pointer to ixgbe_dcb_config structure + * + * Configure Tx Packet Arbiter and credits for each traffic class. + */ +s32 ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw, + struct ixgbe_dcb_config *dcb_config) +{ + struct tc_bw_alloc *p; + u32 reg; + u8 i; + + /* Disable the arbiter before changing parameters */ + IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, IXGBE_RTTPCS_ARBDIS); + + /* Map all traffic classes to their UP, 1 to 1 */ + reg = 0; + for (i = 0; i < MAX_TRAFFIC_CLASS; i++) + reg |= (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++) { + p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG]; + reg = p->data_credits_refill; + reg |= (u32)(p->data_credits_max) << IXGBE_RTTPT2C_MCL_SHIFT; + reg |= (u32)(p->bwg_id) << IXGBE_RTTPT2C_BWG_SHIFT; + + if (p->prio_type == prio_group) + reg |= IXGBE_RTTPT2C_GSP; + + if (p->prio_type == prio_link) + reg |= IXGBE_RTTPT2C_LSP; + + IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg); + } + + /* + * Configure Tx packet plane (recycle mode; SP; arb delay) and + * enable arbiter + */ + reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM | + (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT); + IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg); + + return 0; +} + +/** + * ixgbe_dcb_config_pfc_82599 - Configure priority flow control + * @hw: pointer to hardware structure + * @dcb_config: pointer to ixgbe_dcb_config structure + * + * Configure Priority Flow Control (PFC) for each traffic class. + */ +s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, + struct ixgbe_dcb_config *dcb_config) +{ + u32 i, reg; + + /* If PFC is disabled globally then fall back to LFC. */ + if (!dcb_config->pfc_mode_enable) { + for (i = 0; i < MAX_TRAFFIC_CLASS; i++) + hw->mac.ops.setup_fc(hw, i); + goto out; + } + + /* Configure PFC Tx thresholds per TC */ + for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { + /* Config and remember Tx */ + if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full || + dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx) { + reg = hw->fc.high_water | IXGBE_FCRTH_FCEN; + IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg); + reg = hw->fc.low_water | IXGBE_FCRTL_XONE; + IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), reg); + } else { + IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0); + IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0); + } + } + + /* Configure pause time (2 TCs per register) */ + reg = hw->fc.pause_time | (hw->fc.pause_time << 16); + 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); + + /* Enable Transmit PFC */ + reg = IXGBE_FCCFG_TFCE_PRIORITY; + IXGBE_WRITE_REG(hw, IXGBE_FCCFG, reg); + + /* + * Enable Receive PFC + * We will always honor XOFF frames we receive when + * we are in PFC mode. + */ + reg = IXGBE_READ_REG(hw, IXGBE_MFLCN); + reg &= ~IXGBE_MFLCN_RFCE; + reg |= IXGBE_MFLCN_RPFCE; + IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg); +out: + 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. + */ +s32 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; + else if (i < 16) + reg = 0x01010101; + else if (i < 20) + reg = 0x02020202; + else if (i < 24) + reg = 0x03030303; + else if (i < 26) + reg = 0x04040404; + else if (i < 28) + reg = 0x05050505; + else if (i < 30) + reg = 0x06060606; + else + reg = 0x07070707; + IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg); + } + + return 0; +} + +/** + * ixgbe_dcb_config_82599 - Configure general DCB parameters + * @hw: pointer to hardware structure + * @dcb_config: pointer to ixgbe_dcb_config structure + * + * Configure general DCB parameters. + */ +s32 ixgbe_dcb_config_82599(struct ixgbe_hw *hw) +{ + u32 reg; + u32 q; + + /* Disable the Tx desc arbiter so that MTQC can be changed */ + reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS); + reg |= IXGBE_RTTDCS_ARBDIS; + IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg); + + /* Enable DCB for Rx with 8 TCs */ + reg = IXGBE_READ_REG(hw, IXGBE_MRQC); + switch (reg & IXGBE_MRQC_MRQE_MASK) { + case 0: + case IXGBE_MRQC_RT4TCEN: + /* RSS disabled cases */ + reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN; + break; + case IXGBE_MRQC_RSSEN: + case IXGBE_MRQC_RTRSS4TCEN: + /* RSS enabled cases */ + reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RTRSS8TCEN; + break; + default: + /* Unsupported value, assume stale data, overwrite no RSS */ + reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN; + } + IXGBE_WRITE_REG(hw, IXGBE_MRQC, reg); + + /* Enable DCB for Tx with 8 TCs */ + reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ; + IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg); + + /* Disable drop for all queues */ + for (q = 0; q < 128; q++) + IXGBE_WRITE_REG(hw, IXGBE_QDE, q << IXGBE_QDE_IDX_SHIFT); + + /* Enable the Tx desc arbiter */ + reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS); + reg &= ~IXGBE_RTTDCS_ARBDIS; + IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg); + + return 0; +} + +/** + * ixgbe_dcb_hw_config_82599 - Configure and enable DCB + * @hw: pointer to hardware structure + * @dcb_config: pointer to ixgbe_dcb_config structure + * + * Configure dcb settings and enable dcb mode. + */ +s32 ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw, + struct ixgbe_dcb_config *dcb_config) +{ + ixgbe_dcb_config_packet_buffers_82599(hw, dcb_config); + ixgbe_dcb_config_82599(hw); + ixgbe_dcb_config_rx_arbiter_82599(hw, dcb_config); + ixgbe_dcb_config_tx_desc_arbiter_82599(hw, dcb_config); + ixgbe_dcb_config_tx_data_arbiter_82599(hw, dcb_config); + ixgbe_dcb_config_pfc_82599(hw, dcb_config); + ixgbe_dcb_config_tc_stats_82599(hw); + + return 0; +} + |