forked from Minki/linux
943561d3e7
This change cleans up the logic in the priority based flow control configuration routines. Both the 82599 and 82598 based routines perform similar functions however they are both arranged completely differently. This patch goes over both of them to clean up the code. In addition I am dropping the ixgbe_fc_pfc flow control mode and instead just replacing it with checks for if priority flow control is enabled. This allows us to maintain some of the link flow control information which allows for an easier transition between link and priority flow control. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
363 lines
10 KiB
C
363 lines
10 KiB
C
/*******************************************************************************
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Intel 10 Gigabit PCI Express Linux driver
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Copyright(c) 1999 - 2012 Intel Corporation.
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Contact Information:
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e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*******************************************************************************/
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#include "ixgbe.h"
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#include "ixgbe_type.h"
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#include "ixgbe_dcb.h"
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#include "ixgbe_dcb_82599.h"
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/**
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* ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter
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* @hw: pointer to hardware structure
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* @refill: refill credits index by traffic class
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* @max: max credits index by traffic class
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* @bwg_id: bandwidth grouping indexed by traffic class
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* @prio_type: priority type indexed by traffic class
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*
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* Configure Rx Packet Arbiter and credits for each traffic class.
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*/
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s32 ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw,
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u16 *refill,
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u16 *max,
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u8 *bwg_id,
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u8 *prio_type,
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u8 *prio_tc)
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{
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u32 reg = 0;
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u32 credit_refill = 0;
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u32 credit_max = 0;
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u8 i = 0;
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/*
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* Disable the arbiter before changing parameters
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* (always enable recycle mode; WSP)
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*/
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reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC | IXGBE_RTRPCS_ARBDIS;
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IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
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/* Map all traffic classes to their UP */
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reg = 0;
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for (i = 0; i < MAX_USER_PRIORITY; i++)
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reg |= (prio_tc[i] << (i * IXGBE_RTRUP2TC_UP_SHIFT));
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IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
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/* Configure traffic class credits and priority */
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for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
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credit_refill = refill[i];
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credit_max = max[i];
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reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT);
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reg |= (u32)(bwg_id[i]) << IXGBE_RTRPT4C_BWG_SHIFT;
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if (prio_type[i] == prio_link)
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reg |= IXGBE_RTRPT4C_LSP;
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IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg);
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}
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/*
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* Configure Rx packet plane (recycle mode; WSP) and
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* enable arbiter
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*/
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reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC;
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IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
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return 0;
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}
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/**
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* ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter
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* @hw: pointer to hardware structure
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* @refill: refill credits index by traffic class
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* @max: max credits index by traffic class
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* @bwg_id: bandwidth grouping indexed by traffic class
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* @prio_type: priority type indexed by traffic class
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*
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* Configure Tx Descriptor Arbiter and credits for each traffic class.
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*/
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s32 ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw,
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u16 *refill,
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u16 *max,
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u8 *bwg_id,
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u8 *prio_type)
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{
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u32 reg, max_credits;
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u8 i;
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/* Clear the per-Tx queue credits; we use per-TC instead */
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for (i = 0; i < 128; i++) {
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IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
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IXGBE_WRITE_REG(hw, IXGBE_RTTDT1C, 0);
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}
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/* Configure traffic class credits and priority */
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for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
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max_credits = max[i];
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reg = max_credits << IXGBE_RTTDT2C_MCL_SHIFT;
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reg |= refill[i];
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reg |= (u32)(bwg_id[i]) << IXGBE_RTTDT2C_BWG_SHIFT;
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if (prio_type[i] == prio_group)
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reg |= IXGBE_RTTDT2C_GSP;
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if (prio_type[i] == prio_link)
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reg |= IXGBE_RTTDT2C_LSP;
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IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg);
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}
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/*
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* Configure Tx descriptor plane (recycle mode; WSP) and
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* enable arbiter
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*/
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reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM;
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IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
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return 0;
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}
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/**
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* ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter
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* @hw: pointer to hardware structure
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* @refill: refill credits index by traffic class
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* @max: max credits index by traffic class
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* @bwg_id: bandwidth grouping indexed by traffic class
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* @prio_type: priority type indexed by traffic class
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*
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* Configure Tx Packet Arbiter and credits for each traffic class.
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*/
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s32 ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw,
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u16 *refill,
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u16 *max,
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u8 *bwg_id,
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u8 *prio_type,
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u8 *prio_tc)
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{
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u32 reg;
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u8 i;
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/*
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* Disable the arbiter before changing parameters
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* (always enable recycle mode; SP; arb delay)
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*/
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reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
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(IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT) |
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IXGBE_RTTPCS_ARBDIS;
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IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
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/* Map all traffic classes to their UP */
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reg = 0;
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for (i = 0; i < MAX_USER_PRIORITY; i++)
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reg |= (prio_tc[i] << (i * IXGBE_RTTUP2TC_UP_SHIFT));
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IXGBE_WRITE_REG(hw, IXGBE_RTTUP2TC, reg);
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/* Configure traffic class credits and priority */
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for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
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reg = refill[i];
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reg |= (u32)(max[i]) << IXGBE_RTTPT2C_MCL_SHIFT;
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reg |= (u32)(bwg_id[i]) << IXGBE_RTTPT2C_BWG_SHIFT;
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if (prio_type[i] == prio_group)
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reg |= IXGBE_RTTPT2C_GSP;
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if (prio_type[i] == prio_link)
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reg |= IXGBE_RTTPT2C_LSP;
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IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg);
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}
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/*
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* Configure Tx packet plane (recycle mode; SP; arb delay) and
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* enable arbiter
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*/
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reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
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(IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT);
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IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
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return 0;
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}
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/**
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* ixgbe_dcb_config_pfc_82599 - Configure priority flow control
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* @hw: pointer to hardware structure
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* @pfc_en: enabled pfc bitmask
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* @prio_tc: priority to tc assignments indexed by priority
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*
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* Configure Priority Flow Control (PFC) for each traffic class.
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*/
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s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
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{
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u32 i, j, fcrtl, reg;
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u8 max_tc = 0;
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/* Enable Transmit Priority Flow Control */
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IXGBE_WRITE_REG(hw, IXGBE_FCCFG, IXGBE_FCCFG_TFCE_PRIORITY);
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/* Enable Receive Priority Flow Control */
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reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
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reg |= IXGBE_MFLCN_DPF;
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/*
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* X540 supports per TC Rx priority flow control. So
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* clear all TCs and only enable those that should be
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* enabled.
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*/
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reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
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if (hw->mac.type == ixgbe_mac_X540)
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reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
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if (pfc_en)
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reg |= IXGBE_MFLCN_RPFCE;
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IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
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for (i = 0; i < MAX_USER_PRIORITY; i++) {
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if (prio_tc[i] > max_tc)
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max_tc = prio_tc[i];
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}
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fcrtl = (hw->fc.low_water << 10) | IXGBE_FCRTL_XONE;
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/* Configure PFC Tx thresholds per TC */
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for (i = 0; i <= max_tc; i++) {
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int enabled = 0;
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for (j = 0; j < MAX_USER_PRIORITY; j++) {
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if ((prio_tc[j] == i) && (pfc_en & (1 << j))) {
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enabled = 1;
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break;
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}
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}
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if (enabled) {
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reg = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
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IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
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} else {
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reg = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 32;
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IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
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}
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IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
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}
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for (; i < MAX_TRAFFIC_CLASS; i++) {
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IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
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IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
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}
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/* Configure pause time (2 TCs per register) */
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reg = hw->fc.pause_time * 0x00010001;
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for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
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IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
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/* Configure flow control refresh threshold value */
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IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
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return 0;
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}
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/**
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* ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics
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* @hw: pointer to hardware structure
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*
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* Configure queue statistics registers, all queues belonging to same traffic
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* class uses a single set of queue statistics counters.
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*/
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static s32 ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw)
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{
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u32 reg = 0;
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u8 i = 0;
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/*
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* Receive Queues stats setting
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* 32 RQSMR registers, each configuring 4 queues.
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* Set all 16 queues of each TC to the same stat
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* with TC 'n' going to stat 'n'.
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*/
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for (i = 0; i < 32; i++) {
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reg = 0x01010101 * (i / 4);
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IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
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}
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/*
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* Transmit Queues stats setting
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* 32 TQSM registers, each controlling 4 queues.
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* Set all queues of each TC to the same stat
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* with TC 'n' going to stat 'n'.
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* Tx queues are allocated non-uniformly to TCs:
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* 32, 32, 16, 16, 8, 8, 8, 8.
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*/
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for (i = 0; i < 32; i++) {
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if (i < 8)
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reg = 0x00000000;
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else if (i < 16)
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reg = 0x01010101;
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else if (i < 20)
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reg = 0x02020202;
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else if (i < 24)
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reg = 0x03030303;
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else if (i < 26)
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reg = 0x04040404;
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else if (i < 28)
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reg = 0x05050505;
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else if (i < 30)
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reg = 0x06060606;
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else
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reg = 0x07070707;
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IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
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}
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return 0;
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}
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/**
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* ixgbe_dcb_hw_config_82599 - Configure and enable DCB
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* @hw: pointer to hardware structure
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* @refill: refill credits index by traffic class
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* @max: max credits index by traffic class
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* @bwg_id: bandwidth grouping indexed by traffic class
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* @prio_type: priority type indexed by traffic class
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* @pfc_en: enabled pfc bitmask
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*
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* Configure dcb settings and enable dcb mode.
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*/
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s32 ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw, u8 pfc_en, u16 *refill,
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u16 *max, u8 *bwg_id, u8 *prio_type, u8 *prio_tc)
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{
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ixgbe_dcb_config_rx_arbiter_82599(hw, refill, max, bwg_id,
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prio_type, prio_tc);
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ixgbe_dcb_config_tx_desc_arbiter_82599(hw, refill, max,
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bwg_id, prio_type);
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ixgbe_dcb_config_tx_data_arbiter_82599(hw, refill, max,
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bwg_id, prio_type, prio_tc);
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ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
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ixgbe_dcb_config_tc_stats_82599(hw);
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return 0;
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}
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