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Date: Tue, 29 Jul 2014 08:57:55 -0500
From: Tom Lendacky <thomas.lendacky@....com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>
Subject: [PATCH net-next v2 8/8] amd-xgbe: Add traffic class support
This patch adds support for traffic classes as well as support
for Data Center Bridging interfaces related to traffic classes
and priority flow control.
Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
---
drivers/net/ethernet/amd/Kconfig | 10 +
drivers/net/ethernet/amd/xgbe/Makefile | 1
drivers/net/ethernet/amd/xgbe/xgbe-common.h | 22 ++
drivers/net/ethernet/amd/xgbe/xgbe-dcb.c | 270 +++++++++++++++++++++++++++
drivers/net/ethernet/amd/xgbe/xgbe-dev.c | 180 ++++++++++++++++--
drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 29 +++
drivers/net/ethernet/amd/xgbe/xgbe-main.c | 5 -
drivers/net/ethernet/amd/xgbe/xgbe.h | 18 ++
8 files changed, 508 insertions(+), 27 deletions(-)
create mode 100644 drivers/net/ethernet/amd/xgbe/xgbe-dcb.c
diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig
index 98ef8ff..8319c99 100644
--- a/drivers/net/ethernet/amd/Kconfig
+++ b/drivers/net/ethernet/amd/Kconfig
@@ -192,4 +192,14 @@ config AMD_XGBE
To compile this driver as a module, choose M here: the module
will be called amd-xgbe.
+config AMD_XGBE_DCB
+ bool "Data Center Bridging (DCB) support"
+ default n
+ depends on AMD_XGBE && DCB
+ ---help---
+ Say Y here to enable Data Center Bridging (DCB) support in the
+ driver.
+
+ If unsure, say N.
+
endif # NET_VENDOR_AMD
diff --git a/drivers/net/ethernet/amd/xgbe/Makefile b/drivers/net/ethernet/amd/xgbe/Makefile
index 66c49b4..171a7e6 100644
--- a/drivers/net/ethernet/amd/xgbe/Makefile
+++ b/drivers/net/ethernet/amd/xgbe/Makefile
@@ -4,4 +4,5 @@ amd-xgbe-objs := xgbe-main.o xgbe-drv.o xgbe-dev.o \
xgbe-desc.o xgbe-ethtool.o xgbe-mdio.o \
xgbe-ptp.o
+amd-xgbe-$(CONFIG_AMD_XGBE_DCB) += xgbe-dcb.o
amd-xgbe-$(CONFIG_DEBUG_FS) += xgbe-debugfs.o
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
index 646702c..cc25a3a 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
@@ -322,6 +322,9 @@
#define MAC_MACA_INC 4
#define MAC_HTR_INC 4
+#define MAC_RQC2_INC 4
+#define MAC_RQC2_Q_PER_REG 4
+
/* MAC register entry bit positions and sizes */
#define MAC_HWF0R_ADDMACADRSEL_INDEX 18
#define MAC_HWF0R_ADDMACADRSEL_WIDTH 5
@@ -361,6 +364,8 @@
#define MAC_HWF1R_HASHTBLSZ_WIDTH 3
#define MAC_HWF1R_L3L4FNUM_INDEX 27
#define MAC_HWF1R_L3L4FNUM_WIDTH 4
+#define MAC_HWF1R_NUMTC_INDEX 21
+#define MAC_HWF1R_NUMTC_WIDTH 3
#define MAC_HWF1R_RSSEN_INDEX 20
#define MAC_HWF1R_RSSEN_WIDTH 1
#define MAC_HWF1R_RXFIFOSIZE_INDEX 0
@@ -433,8 +438,12 @@
#define MAC_RCR_LM_WIDTH 1
#define MAC_RCR_RE_INDEX 0
#define MAC_RCR_RE_WIDTH 1
+#define MAC_RFCR_PFCE_INDEX 8
+#define MAC_RFCR_PFCE_WIDTH 1
#define MAC_RFCR_RFE_INDEX 0
#define MAC_RFCR_RFE_WIDTH 1
+#define MAC_RFCR_UP_INDEX 1
+#define MAC_RFCR_UP_WIDTH 1
#define MAC_RQC0R_RXQ0EN_INDEX 0
#define MAC_RQC0R_RXQ0EN_WIDTH 2
#define MAC_SSIR_SNSINC_INDEX 8
@@ -704,6 +713,8 @@
#define MTL_RQDCM_INC 4
#define MTL_RQDCM_Q_PER_REG 4
+#define MTL_TCPM_INC 4
+#define MTL_TCPM_TC_PER_REG 4
/* MTL register entry bit positions and sizes */
#define MTL_OMR_ETSALG_INDEX 5
@@ -722,9 +733,6 @@
#define MTL_Q_TQOMR 0x00
#define MTL_Q_TQUR 0x04
#define MTL_Q_TQDR 0x08
-#define MTL_Q_TCECR 0x10
-#define MTL_Q_TCESR 0x14
-#define MTL_Q_TCQWR 0x18
#define MTL_Q_RQOMR 0x40
#define MTL_Q_RQMPOCR 0x44
#define MTL_Q_RQDR 0x4c
@@ -732,8 +740,6 @@
#define MTL_Q_ISR 0x74
/* MTL queue register entry bit positions and sizes */
-#define MTL_Q_TCQWR_QW_INDEX 0
-#define MTL_Q_TCQWR_QW_WIDTH 21
#define MTL_Q_RQOMR_EHFC_INDEX 7
#define MTL_Q_RQOMR_EHFC_WIDTH 1
#define MTL_Q_RQOMR_RFA_INDEX 8
@@ -748,6 +754,8 @@
#define MTL_Q_RQOMR_RTC_WIDTH 2
#define MTL_Q_TQOMR_FTQ_INDEX 0
#define MTL_Q_TQOMR_FTQ_WIDTH 1
+#define MTL_Q_TQOMR_Q2TCMAP_INDEX 8
+#define MTL_Q_TQOMR_Q2TCMAP_WIDTH 3
#define MTL_Q_TQOMR_TQS_INDEX 16
#define MTL_Q_TQOMR_TQS_WIDTH 10
#define MTL_Q_TQOMR_TSF_INDEX 1
@@ -794,10 +802,14 @@
#define MTL_TC_INC MTL_Q_INC
#define MTL_TC_ETSCR 0x10
+#define MTL_TC_ETSSR 0x14
+#define MTL_TC_QWR 0x18
/* MTL traffic class register entry bit positions and sizes */
#define MTL_TC_ETSCR_TSA_INDEX 0
#define MTL_TC_ETSCR_TSA_WIDTH 2
+#define MTL_TC_QWR_QW_INDEX 0
+#define MTL_TC_QWR_QW_WIDTH 21
/* MTL traffic class register value */
#define MTL_TSA_SP 0x00
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dcb.c b/drivers/net/ethernet/amd/xgbe/xgbe-dcb.c
new file mode 100644
index 0000000..7d6a49b
--- /dev/null
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dcb.c
@@ -0,0 +1,270 @@
+/*
+ * AMD 10Gb Ethernet driver
+ *
+ * This file is available to you under your choice of the following two
+ * licenses:
+ *
+ * License 1: GPLv2
+ *
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ *
+ * This file is free software; you may copy, redistribute and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This file is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ * The Synopsys DWC ETHER XGMAC Software Driver and documentation
+ * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
+ * Inc. unless otherwise expressly agreed to in writing between Synopsys
+ * and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for Licensed
+ * Product with Synopsys or any supplement thereto. Permission is hereby
+ * granted, free of charge, to any person obtaining a copy of this software
+ * annotated with this license and the Software, to deal in the Software
+ * without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * License 2: Modified BSD
+ *
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Advanced Micro Devices, Inc. nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ * The Synopsys DWC ETHER XGMAC Software Driver and documentation
+ * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
+ * Inc. unless otherwise expressly agreed to in writing between Synopsys
+ * and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for Licensed
+ * Product with Synopsys or any supplement thereto. Permission is hereby
+ * granted, free of charge, to any person obtaining a copy of this software
+ * annotated with this license and the Software, to deal in the Software
+ * without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/netdevice.h>
+#include <net/dcbnl.h>
+
+#include "xgbe.h"
+#include "xgbe-common.h"
+
+
+static int xgbe_dcb_ieee_getets(struct net_device *netdev,
+ struct ieee_ets *ets)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+
+ /* Set number of supported traffic classes */
+ ets->ets_cap = pdata->hw_feat.tc_cnt;
+
+ if (pdata->ets) {
+ ets->cbs = pdata->ets->cbs;
+ memcpy(ets->tc_tx_bw, pdata->ets->tc_tx_bw,
+ sizeof(ets->tc_tx_bw));
+ memcpy(ets->tc_tsa, pdata->ets->tc_tsa,
+ sizeof(ets->tc_tsa));
+ memcpy(ets->prio_tc, pdata->ets->prio_tc,
+ sizeof(ets->prio_tc));
+ }
+
+ return 0;
+}
+
+static int xgbe_dcb_ieee_setets(struct net_device *netdev,
+ struct ieee_ets *ets)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+ unsigned int i, tc_ets, tc_ets_weight;
+
+ tc_ets = 0;
+ tc_ets_weight = 0;
+ for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
+ DBGPR(" TC%u: tx_bw=%hhu, rx_bw=%hhu, tsa=%hhu\n", i,
+ ets->tc_tx_bw[i], ets->tc_rx_bw[i], ets->tc_tsa[i]);
+ DBGPR(" PRIO%u: TC=%hhu\n", i, ets->prio_tc[i]);
+
+ if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) &&
+ (i >= pdata->hw_feat.tc_cnt))
+ return -EINVAL;
+
+ if (ets->prio_tc[i] >= pdata->hw_feat.tc_cnt)
+ return -EINVAL;
+
+ switch (ets->tc_tsa[i]) {
+ case IEEE_8021QAZ_TSA_STRICT:
+ break;
+ case IEEE_8021QAZ_TSA_ETS:
+ tc_ets = 1;
+ tc_ets_weight += ets->tc_tx_bw[i];
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ }
+
+ /* Weights must add up to 100% */
+ if (tc_ets && (tc_ets_weight != 100))
+ return -EINVAL;
+
+ if (!pdata->ets) {
+ pdata->ets = devm_kzalloc(pdata->dev, sizeof(*pdata->ets),
+ GFP_KERNEL);
+ if (!pdata->ets)
+ return -ENOMEM;
+ }
+
+ memcpy(pdata->ets, ets, sizeof(*pdata->ets));
+
+ pdata->hw_if.config_dcb_tc(pdata);
+
+ return 0;
+}
+
+static int xgbe_dcb_ieee_getpfc(struct net_device *netdev,
+ struct ieee_pfc *pfc)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+
+ /* Set number of supported PFC traffic classes */
+ pfc->pfc_cap = pdata->hw_feat.tc_cnt;
+
+ if (pdata->pfc) {
+ pfc->pfc_en = pdata->pfc->pfc_en;
+ pfc->mbc = pdata->pfc->mbc;
+ pfc->delay = pdata->pfc->delay;
+ }
+
+ return 0;
+}
+
+static int xgbe_dcb_ieee_setpfc(struct net_device *netdev,
+ struct ieee_pfc *pfc)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+
+ DBGPR(" cap=%hhu, en=%hhx, mbc=%hhu, delay=%hhu\n",
+ pfc->pfc_cap, pfc->pfc_en, pfc->mbc, pfc->delay);
+
+ if (!pdata->pfc) {
+ pdata->pfc = devm_kzalloc(pdata->dev, sizeof(*pdata->pfc),
+ GFP_KERNEL);
+ if (!pdata->pfc)
+ return -ENOMEM;
+ }
+
+ memcpy(pdata->pfc, pfc, sizeof(*pdata->pfc));
+
+ pdata->hw_if.config_dcb_pfc(pdata);
+
+ return 0;
+}
+
+static u8 xgbe_dcb_getdcbx(struct net_device *netdev)
+{
+ return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
+}
+
+static u8 xgbe_dcb_setdcbx(struct net_device *netdev, u8 dcbx)
+{
+ u8 support = xgbe_dcb_getdcbx(netdev);
+
+ DBGPR(" DCBX=%#hhx\n", dcbx);
+
+ if (dcbx & ~support)
+ return 1;
+
+ if ((dcbx & support) != support)
+ return 1;
+
+ return 0;
+}
+
+static const struct dcbnl_rtnl_ops xgbe_dcbnl_ops = {
+ /* IEEE 802.1Qaz std */
+ .ieee_getets = xgbe_dcb_ieee_getets,
+ .ieee_setets = xgbe_dcb_ieee_setets,
+ .ieee_getpfc = xgbe_dcb_ieee_getpfc,
+ .ieee_setpfc = xgbe_dcb_ieee_setpfc,
+
+ /* DCBX configuration */
+ .getdcbx = xgbe_dcb_getdcbx,
+ .setdcbx = xgbe_dcb_setdcbx,
+};
+
+const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void)
+{
+ return &xgbe_dcbnl_ops;
+}
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index 2cdf34f..edaca44 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
@@ -407,7 +407,9 @@ static int xgbe_enable_rx_flow_control(struct xgbe_prv_data *pdata)
static int xgbe_config_tx_flow_control(struct xgbe_prv_data *pdata)
{
- if (pdata->tx_pause)
+ struct ieee_pfc *pfc = pdata->pfc;
+
+ if (pdata->tx_pause || (pfc && pfc->pfc_en))
xgbe_enable_tx_flow_control(pdata);
else
xgbe_disable_tx_flow_control(pdata);
@@ -417,7 +419,9 @@ static int xgbe_config_tx_flow_control(struct xgbe_prv_data *pdata)
static int xgbe_config_rx_flow_control(struct xgbe_prv_data *pdata)
{
- if (pdata->rx_pause)
+ struct ieee_pfc *pfc = pdata->pfc;
+
+ if (pdata->rx_pause || (pfc && pfc->pfc_en))
xgbe_enable_rx_flow_control(pdata);
else
xgbe_disable_rx_flow_control(pdata);
@@ -427,8 +431,13 @@ static int xgbe_config_rx_flow_control(struct xgbe_prv_data *pdata)
static void xgbe_config_flow_control(struct xgbe_prv_data *pdata)
{
+ struct ieee_pfc *pfc = pdata->pfc;
+
xgbe_config_tx_flow_control(pdata);
xgbe_config_rx_flow_control(pdata);
+
+ XGMAC_IOWRITE_BITS(pdata, MAC_RFCR, PFCE,
+ (pfc && pfc->pfc_en) ? 1 : 0);
}
static void xgbe_enable_dma_interrupts(struct xgbe_prv_data *pdata)
@@ -1117,6 +1126,79 @@ static int xgbe_config_tstamp(struct xgbe_prv_data *pdata,
return 0;
}
+static void xgbe_config_dcb_tc(struct xgbe_prv_data *pdata)
+{
+ struct ieee_ets *ets = pdata->ets;
+ unsigned int total_weight, min_weight, weight;
+ unsigned int i;
+
+ if (!ets)
+ return;
+
+ /* Set Tx to deficit weighted round robin scheduling algorithm (when
+ * traffic class is using ETS algorithm)
+ */
+ XGMAC_IOWRITE_BITS(pdata, MTL_OMR, ETSALG, MTL_ETSALG_DWRR);
+
+ /* Set Traffic Class algorithms */
+ total_weight = pdata->netdev->mtu * pdata->hw_feat.tc_cnt;
+ min_weight = total_weight / 100;
+ if (!min_weight)
+ min_weight = 1;
+
+ for (i = 0; i < pdata->hw_feat.tc_cnt; i++) {
+ switch (ets->tc_tsa[i]) {
+ case IEEE_8021QAZ_TSA_STRICT:
+ DBGPR(" TC%u using SP\n", i);
+ XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_ETSCR, TSA,
+ MTL_TSA_SP);
+ break;
+ case IEEE_8021QAZ_TSA_ETS:
+ weight = total_weight * ets->tc_tx_bw[i] / 100;
+ weight = clamp(weight, min_weight, total_weight);
+
+ DBGPR(" TC%u using DWRR (weight %u)\n", i, weight);
+ XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_ETSCR, TSA,
+ MTL_TSA_ETS);
+ XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_QWR, QW,
+ weight);
+ break;
+ }
+ }
+}
+
+static void xgbe_config_dcb_pfc(struct xgbe_prv_data *pdata)
+{
+ struct ieee_pfc *pfc = pdata->pfc;
+ struct ieee_ets *ets = pdata->ets;
+ unsigned int mask, reg, reg_val;
+ unsigned int tc, prio;
+
+ if (!pfc || !ets)
+ return;
+
+ for (tc = 0; tc < pdata->hw_feat.tc_cnt; tc++) {
+ mask = 0;
+ for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; prio++) {
+ if ((pfc->pfc_en & (1 << prio)) &&
+ (ets->prio_tc[prio] == tc))
+ mask |= (1 << prio);
+ }
+ mask &= 0xff;
+
+ DBGPR(" TC%u PFC mask=%#x\n", tc, mask);
+ reg = MTL_TCPM0R + (MTL_TCPM_INC * (tc / MTL_TCPM_TC_PER_REG));
+ reg_val = XGMAC_IOREAD(pdata, reg);
+
+ reg_val &= ~(0xff << ((tc % MTL_TCPM_TC_PER_REG) << 3));
+ reg_val |= (mask << ((tc % MTL_TCPM_TC_PER_REG) << 3));
+
+ XGMAC_IOWRITE(pdata, reg, reg_val);
+ }
+
+ xgbe_config_flow_control(pdata);
+}
+
static void xgbe_pre_xmit(struct xgbe_channel *channel)
{
struct xgbe_prv_data *pdata = channel->pdata;
@@ -1607,14 +1689,15 @@ static void xgbe_config_mtl_mode(struct xgbe_prv_data *pdata)
{
unsigned int i;
- /* Set Tx to weighted round robin scheduling algorithm (when
- * traffic class is using ETS algorithm)
- */
+ /* Set Tx to weighted round robin scheduling algorithm */
XGMAC_IOWRITE_BITS(pdata, MTL_OMR, ETSALG, MTL_ETSALG_WRR);
- /* Set Tx traffic classes to strict priority algorithm */
- for (i = 0; i < XGBE_TC_CNT; i++)
- XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_ETSCR, TSA, MTL_TSA_SP);
+ /* Set Tx traffic classes to use WRR algorithm with equal weights */
+ for (i = 0; i < pdata->hw_feat.tc_cnt; i++) {
+ XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_ETSCR, TSA,
+ MTL_TSA_ETS);
+ XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_QWR, QW, 1);
+ }
/* Set Rx to strict priority algorithm */
XGMAC_IOWRITE_BITS(pdata, MTL_OMR, RAA, MTL_RAA_SP);
@@ -1724,18 +1807,75 @@ static void xgbe_config_rx_fifo_size(struct xgbe_prv_data *pdata)
pdata->rx_q_count, ((fifo_size + 1) * 256));
}
-static void xgbe_config_rx_queue_mapping(struct xgbe_prv_data *pdata)
+static void xgbe_config_queue_mapping(struct xgbe_prv_data *pdata)
{
- unsigned int i, reg, reg_val;
- unsigned int q_count = pdata->rx_q_count;
+ unsigned int qptc, qptc_extra, queue;
+ unsigned int prio_queues;
+ unsigned int ppq, ppq_extra, prio;
+ unsigned int mask;
+ unsigned int i, j, reg, reg_val;
+
+ /* Map the MTL Tx Queues to Traffic Classes
+ * Note: Tx Queues >= Traffic Classes
+ */
+ qptc = pdata->tx_q_count / pdata->hw_feat.tc_cnt;
+ qptc_extra = pdata->tx_q_count % pdata->hw_feat.tc_cnt;
+
+ for (i = 0, queue = 0; i < pdata->hw_feat.tc_cnt; i++) {
+ for (j = 0; j < qptc; j++) {
+ DBGPR(" TXq%u mapped to TC%u\n", queue, i);
+ XGMAC_MTL_IOWRITE_BITS(pdata, queue, MTL_Q_TQOMR,
+ Q2TCMAP, i);
+ pdata->q2tc_map[queue++] = i;
+ }
+
+ if (i < qptc_extra) {
+ DBGPR(" TXq%u mapped to TC%u\n", queue, i);
+ XGMAC_MTL_IOWRITE_BITS(pdata, queue, MTL_Q_TQOMR,
+ Q2TCMAP, i);
+ pdata->q2tc_map[queue++] = i;
+ }
+ }
+
+ /* Map the 8 VLAN priority values to available MTL Rx queues */
+ prio_queues = min_t(unsigned int, IEEE_8021QAZ_MAX_TCS,
+ pdata->rx_q_count);
+ ppq = IEEE_8021QAZ_MAX_TCS / prio_queues;
+ ppq_extra = IEEE_8021QAZ_MAX_TCS % prio_queues;
+
+ reg = MAC_RQC2R;
+ reg_val = 0;
+ for (i = 0, prio = 0; i < prio_queues;) {
+ mask = 0;
+ for (j = 0; j < ppq; j++) {
+ DBGPR(" PRIO%u mapped to RXq%u\n", prio, i);
+ mask |= (1 << prio);
+ pdata->prio2q_map[prio++] = i;
+ }
+
+ if (i < ppq_extra) {
+ DBGPR(" PRIO%u mapped to RXq%u\n", prio, i);
+ mask |= (1 << prio);
+ pdata->prio2q_map[prio++] = i;
+ }
+
+ reg_val |= (mask << ((i++ % MAC_RQC2_Q_PER_REG) << 3));
+
+ if ((i % MAC_RQC2_Q_PER_REG) && (i != prio_queues))
+ continue;
+
+ XGMAC_IOWRITE(pdata, reg, reg_val);
+ reg += MAC_RQC2_INC;
+ reg_val = 0;
+ }
/* Select dynamic mapping of MTL Rx queue to DMA Rx channel */
reg = MTL_RQDCM0R;
reg_val = 0;
- for (i = 0; i < q_count;) {
+ for (i = 0; i < pdata->rx_q_count;) {
reg_val |= (0x80 << ((i++ % MTL_RQDCM_Q_PER_REG) << 3));
- if ((i % MTL_RQDCM_Q_PER_REG) && (i != q_count))
+ if ((i % MTL_RQDCM_Q_PER_REG) && (i != pdata->rx_q_count))
continue;
XGMAC_IOWRITE(pdata, reg, reg_val);
@@ -2321,9 +2461,7 @@ static int xgbe_init(struct xgbe_prv_data *pdata)
* Initialize MTL related features
*/
xgbe_config_mtl_mode(pdata);
- xgbe_config_rx_queue_mapping(pdata);
- /*TODO: Program the priorities mapped to the Selected Traffic Classes
- in MTL_TC_Prty_Map0-3 registers */
+ xgbe_config_queue_mapping(pdata);
xgbe_config_tsf_mode(pdata, pdata->tx_sf_mode);
xgbe_config_rsf_mode(pdata, pdata->rx_sf_mode);
xgbe_config_tx_threshold(pdata, pdata->tx_threshold);
@@ -2331,15 +2469,13 @@ static int xgbe_init(struct xgbe_prv_data *pdata)
xgbe_config_tx_fifo_size(pdata);
xgbe_config_rx_fifo_size(pdata);
xgbe_config_flow_control_threshold(pdata);
- /*TODO: Queue to Traffic Class Mapping (Q2TCMAP) */
/*TODO: Error Packet and undersized good Packet forwarding enable
(FEP and FUP)
*/
+ xgbe_config_dcb_tc(pdata);
+ xgbe_config_dcb_pfc(pdata);
xgbe_enable_mtl_interrupts(pdata);
- /* Transmit Class Weight */
- XGMAC_IOWRITE_BITS(pdata, MTL_Q_TCQWR, QW, 0x10);
-
/*
* Initialize MAC related features
*/
@@ -2448,5 +2584,9 @@ void xgbe_init_function_ptrs_dev(struct xgbe_hw_if *hw_if)
hw_if->get_tstamp_time = xgbe_get_tstamp_time;
hw_if->get_tx_tstamp = xgbe_get_tx_tstamp;
+ /* For Data Center Bridging config */
+ hw_if->config_dcb_tc = xgbe_config_dcb_tc;
+ hw_if->config_dcb_pfc = xgbe_config_dcb_pfc;
+
DBGPR("<--xgbe_init_function_ptrs\n");
}
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 47a1e25..3bf3c01 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -387,6 +387,7 @@ void xgbe_get_all_hw_features(struct xgbe_prv_data *pdata)
hw_feat->sph = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, SPHEN);
hw_feat->tso = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, TSOEN);
hw_feat->dma_debug = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DBGMEMA);
+ hw_feat->tc_cnt = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, NUMTC);
hw_feat->hash_table_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
HASHTBLSZ);
hw_feat->l3l4_filter_num = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
@@ -1312,6 +1313,33 @@ static void xgbe_poll_controller(struct net_device *netdev)
}
#endif /* End CONFIG_NET_POLL_CONTROLLER */
+static int xgbe_setup_tc(struct net_device *netdev, u8 tc)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+ unsigned int offset, queue;
+ u8 i;
+
+ if (tc && (tc != pdata->hw_feat.tc_cnt))
+ return -EINVAL;
+
+ if (tc) {
+ netdev_set_num_tc(netdev, tc);
+ for (i = 0, queue = 0, offset = 0; i < tc; i++) {
+ while ((queue < pdata->tx_q_count) &&
+ (pdata->q2tc_map[queue] == i))
+ queue++;
+
+ DBGPR(" TC%u using TXq%u-%u\n", i, offset, queue - 1);
+ netdev_set_tc_queue(netdev, i, queue - offset, offset);
+ offset = queue;
+ }
+ } else {
+ netdev_reset_tc(netdev);
+ }
+
+ return 0;
+}
+
static int xgbe_set_features(struct net_device *netdev,
netdev_features_t features)
{
@@ -1360,6 +1388,7 @@ static const struct net_device_ops xgbe_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = xgbe_poll_controller,
#endif
+ .ndo_setup_tc = xgbe_setup_tc,
.ndo_set_features = xgbe_set_features,
};
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
index 04e6c72..ec977d3 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
@@ -400,9 +400,12 @@ static int xgbe_probe(struct platform_device *pdev)
if (ret)
goto err_bus_id;
- /* Set network and ethtool operations */
+ /* Set device operations */
netdev->netdev_ops = xgbe_get_netdev_ops();
netdev->ethtool_ops = xgbe_get_ethtool_ops();
+#ifdef CONFIG_AMD_XGBE_DCB
+ netdev->dcbnl_ops = xgbe_get_dcbnl_ops();
+#endif
/* Set device features */
netdev->hw_features = NETIF_F_SG |
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index f011d88..07bf70a 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -126,6 +126,7 @@
#include <linux/ptp_clock_kernel.h>
#include <linux/clocksource.h>
#include <linux/net_tstamp.h>
+#include <net/dcbnl.h>
#define XGBE_DRV_NAME "amd-xgbe"
@@ -144,6 +145,7 @@
#define XGBE_RX_BUF_ALIGN 64
#define XGBE_MAX_DMA_CHANNELS 16
+#define XGBE_MAX_QUEUES 16
/* DMA cache settings - Outer sharable, write-back, write-allocate */
#define XGBE_DMA_OS_AXDOMAIN 0x2
@@ -184,7 +186,7 @@
#define XGBE_FIFO_SIZE_B(x) (x)
#define XGBE_FIFO_SIZE_KB(x) (x * 1024)
-#define XGBE_TC_CNT 2
+#define XGBE_TC_MIN_QUANTUM 10
/* Helper macro for descriptor handling
* Always use XGBE_GET_DESC_DATA to access the descriptor data
@@ -504,6 +506,10 @@ struct xgbe_hw_if {
unsigned int nsec);
u64 (*get_tstamp_time)(struct xgbe_prv_data *);
u64 (*get_tx_tstamp)(struct xgbe_prv_data *);
+
+ /* For Data Center Bridging config */
+ void (*config_dcb_tc)(struct xgbe_prv_data *);
+ void (*config_dcb_pfc)(struct xgbe_prv_data *);
};
struct xgbe_desc_if {
@@ -545,6 +551,7 @@ struct xgbe_hw_features {
unsigned int tso; /* TCP Segmentation Offload */
unsigned int dma_debug; /* DMA Debug Registers */
unsigned int rss; /* Receive Side Scaling */
+ unsigned int tc_cnt; /* Number of Traffic Classes */
unsigned int hash_table_size; /* Hash Table Size */
unsigned int l3l4_filter_num; /* Number of L3-L4 Filters */
@@ -663,6 +670,12 @@ struct xgbe_prv_data {
struct sk_buff *tx_tstamp_skb;
u64 tx_tstamp;
+ /* DCB support */
+ struct ieee_ets *ets;
+ struct ieee_pfc *pfc;
+ unsigned int q2tc_map[XGBE_MAX_QUEUES];
+ unsigned int prio2q_map[IEEE_8021QAZ_MAX_TCS];
+
/* Hardware features of the device */
struct xgbe_hw_features hw_feat;
@@ -688,6 +701,9 @@ void xgbe_init_function_ptrs_dev(struct xgbe_hw_if *);
void xgbe_init_function_ptrs_desc(struct xgbe_desc_if *);
struct net_device_ops *xgbe_get_netdev_ops(void);
struct ethtool_ops *xgbe_get_ethtool_ops(void);
+#ifdef CONFIG_AMD_XGBE_DCB
+const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void);
+#endif
int xgbe_mdio_register(struct xgbe_prv_data *);
void xgbe_mdio_unregister(struct xgbe_prv_data *);
--
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