17049d30c2
This patch adds support to use the priority assignment table in the ieee_ets structure to map priorities to traffic classes. Previously ixgbe only supported a 1:1 mapping. Now we can enable and disable hardware DCB support when multiple traffic classes are actually being used. This allows the default case all priorities mapped to traffic class 0 to work in normal hardware mode and utilize the full packet buffer. This patch does not address putting the hardware in 4TC mode so packet buffer space may be underutilized in this case. A follow up patch can address this optimization. But at least we have the hooks to do this now. Also CEE will behave as it always has and map priorities 1:1 with traffic classes. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
444 lines
12 KiB
C
444 lines
12 KiB
C
/*******************************************************************************
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Intel 10 Gigabit PCI Express Linux driver
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Copyright(c) 1999 - 2011 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_packet_buffers_82599 - Configure DCB packet buffers
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* @hw: pointer to hardware structure
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* @rx_pba: method to distribute packet buffer
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*
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* Configure packet buffers for DCB mode.
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*/
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static s32 ixgbe_dcb_config_packet_buffers_82599(struct ixgbe_hw *hw, u8 rx_pba)
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{
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s32 ret_val = 0;
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u32 value = IXGBE_RXPBSIZE_64KB;
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u8 i = 0;
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/* Setup Rx packet buffer sizes */
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switch (rx_pba) {
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case pba_80_48:
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/* Setup the first four at 80KB */
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value = IXGBE_RXPBSIZE_80KB;
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for (; i < 4; i++)
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IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
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/* Setup the last four at 48KB...don't re-init i */
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value = IXGBE_RXPBSIZE_48KB;
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/* Fall Through */
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case pba_equal:
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default:
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for (; i < IXGBE_MAX_PACKET_BUFFERS; i++)
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IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
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/* Setup Tx packet buffer sizes */
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for (i = 0; i < IXGBE_MAX_PACKET_BUFFERS; i++) {
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IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i),
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IXGBE_TXPBSIZE_20KB);
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IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i),
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IXGBE_TXPBTHRESH_DCB);
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}
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break;
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}
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return ret_val;
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}
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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, 1 to 1 */
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reg = 0;
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for (i = 0; i < MAX_TRAFFIC_CLASS; 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, 1 to 1 */
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reg = 0;
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for (i = 0; i < MAX_TRAFFIC_CLASS; 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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*
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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)
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{
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u32 i, reg, rx_pba_size;
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/* If PFC is disabled globally then fall back to LFC. */
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if (!pfc_en) {
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for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
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hw->mac.ops.fc_enable(hw, i);
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goto out;
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}
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/* Configure PFC Tx thresholds per TC */
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for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
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int enabled = pfc_en & (1 << i);
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rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i));
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rx_pba_size >>= IXGBE_RXPBSIZE_SHIFT;
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reg = (rx_pba_size - hw->fc.low_water) << 10;
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if (enabled)
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reg |= IXGBE_FCRTL_XONE;
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IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), reg);
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reg = (rx_pba_size - hw->fc.high_water) << 10;
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if (enabled)
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reg |= IXGBE_FCRTH_FCEN;
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IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
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}
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/* Configure pause time (2 TCs per register) */
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reg = hw->fc.pause_time | (hw->fc.pause_time << 16);
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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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/* Enable Transmit PFC */
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reg = IXGBE_FCCFG_TFCE_PRIORITY;
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IXGBE_WRITE_REG(hw, IXGBE_FCCFG, reg);
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/*
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* Enable Receive PFC
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* We will always honor XOFF frames we receive when
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* we are in PFC mode.
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*/
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reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
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reg &= ~IXGBE_MFLCN_RFCE;
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reg |= IXGBE_MFLCN_RPFCE | IXGBE_MFLCN_DPF;
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IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
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out:
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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_config_82599 - Configure general DCB parameters
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* @hw: pointer to hardware structure
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*
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* Configure general DCB parameters.
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*/
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static s32 ixgbe_dcb_config_82599(struct ixgbe_hw *hw)
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{
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u32 reg;
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u32 q;
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/* Disable the Tx desc arbiter so that MTQC can be changed */
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reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
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reg |= IXGBE_RTTDCS_ARBDIS;
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IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
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/* Enable DCB for Rx with 8 TCs */
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reg = IXGBE_READ_REG(hw, IXGBE_MRQC);
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switch (reg & IXGBE_MRQC_MRQE_MASK) {
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case 0:
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case IXGBE_MRQC_RT4TCEN:
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/* RSS disabled cases */
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reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN;
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break;
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case IXGBE_MRQC_RSSEN:
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case IXGBE_MRQC_RTRSS4TCEN:
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/* RSS enabled cases */
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reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RTRSS8TCEN;
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break;
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default:
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/* Unsupported value, assume stale data, overwrite no RSS */
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reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN;
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}
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IXGBE_WRITE_REG(hw, IXGBE_MRQC, reg);
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/* Enable DCB for Tx with 8 TCs */
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reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
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IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
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/* Disable drop for all queues */
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for (q = 0; q < 128; q++)
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IXGBE_WRITE_REG(hw, IXGBE_QDE, q << IXGBE_QDE_IDX_SHIFT);
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/* Enable the Tx desc arbiter */
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reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
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reg &= ~IXGBE_RTTDCS_ARBDIS;
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IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
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/* Enable Security TX Buffer IFG for DCB */
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reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
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reg |= IXGBE_SECTX_DCB;
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IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);
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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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* @rx_pba: method to distribute packet buffer
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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,
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u8 rx_pba, 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_packet_buffers_82599(hw, rx_pba);
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ixgbe_dcb_config_82599(hw);
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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);
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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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