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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/net/ethernet/apm/xgene-v2
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/ethernet/apm/xgene-v2')
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/Kconfig11
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/Makefile7
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/enet.c71
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/enet.h33
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/ethtool.c175
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/ethtool.h66
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/mac.c104
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/mac.h95
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/main.c746
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/main.h67
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/mdio.c158
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/ring.c69
-rw-r--r--drivers/net/ethernet/apm/xgene-v2/ring.h107
13 files changed, 1709 insertions, 0 deletions
diff --git a/drivers/net/ethernet/apm/xgene-v2/Kconfig b/drivers/net/ethernet/apm/xgene-v2/Kconfig
new file mode 100644
index 000000000..2274af912
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/Kconfig
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config NET_XGENE_V2
+ tristate "APM X-Gene SoC Ethernet-v2 Driver"
+ depends on ARCH_XGENE || COMPILE_TEST
+ help
+ This is the Ethernet driver for the on-chip ethernet interface
+ which uses a linked list of DMA descriptor architecture (v2) for
+ APM X-Gene SoCs.
+
+ To compile this driver as a module, choose M here. This module will
+ be called xgene-enet-v2.
diff --git a/drivers/net/ethernet/apm/xgene-v2/Makefile b/drivers/net/ethernet/apm/xgene-v2/Makefile
new file mode 100644
index 000000000..fdde3b668
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for APM X-Gene Ethernet v2 driver
+#
+
+xgene-enet-v2-objs := main.o mac.o enet.o ring.o mdio.o ethtool.o
+obj-$(CONFIG_NET_XGENE_V2) += xgene-enet-v2.o
diff --git a/drivers/net/ethernet/apm/xgene-v2/enet.c b/drivers/net/ethernet/apm/xgene-v2/enet.c
new file mode 100644
index 000000000..a8c6b379d
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/enet.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#include "main.h"
+
+void xge_wr_csr(struct xge_pdata *pdata, u32 offset, u32 val)
+{
+ void __iomem *addr = pdata->resources.base_addr + offset;
+
+ iowrite32(val, addr);
+}
+
+u32 xge_rd_csr(struct xge_pdata *pdata, u32 offset)
+{
+ void __iomem *addr = pdata->resources.base_addr + offset;
+
+ return ioread32(addr);
+}
+
+int xge_port_reset(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ u32 data, wait = 10;
+
+ xge_wr_csr(pdata, ENET_CLKEN, 0x3);
+ xge_wr_csr(pdata, ENET_SRST, 0xf);
+ xge_wr_csr(pdata, ENET_SRST, 0);
+ xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 1);
+ xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 0);
+
+ do {
+ usleep_range(100, 110);
+ data = xge_rd_csr(pdata, BLOCK_MEM_RDY);
+ } while (data != MEM_RDY && wait--);
+
+ if (data != MEM_RDY) {
+ dev_err(dev, "ECC init failed: %x\n", data);
+ return -ETIMEDOUT;
+ }
+
+ xge_wr_csr(pdata, ENET_SHIM, DEVM_ARAUX_COH | DEVM_AWAUX_COH);
+
+ return 0;
+}
+
+static void xge_traffic_resume(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+
+ xge_wr_csr(pdata, CFG_FORCE_LINK_STATUS_EN, 1);
+ xge_wr_csr(pdata, FORCE_LINK_STATUS, 1);
+
+ xge_wr_csr(pdata, CFG_LINK_AGGR_RESUME, 1);
+ xge_wr_csr(pdata, RX_DV_GATE_REG, 1);
+}
+
+void xge_port_init(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+
+ pdata->phy_speed = SPEED_1000;
+ xge_mac_init(pdata);
+ xge_traffic_resume(ndev);
+}
diff --git a/drivers/net/ethernet/apm/xgene-v2/enet.h b/drivers/net/ethernet/apm/xgene-v2/enet.h
new file mode 100644
index 000000000..15cbd0ca1
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/enet.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#ifndef __XGENE_ENET_V2_ENET_H__
+#define __XGENE_ENET_V2_ENET_H__
+
+#define ENET_CLKEN 0xc008
+#define ENET_SRST 0xc000
+#define ENET_SHIM 0xc010
+#define CFG_MEM_RAM_SHUTDOWN 0xd070
+#define BLOCK_MEM_RDY 0xd074
+
+#define MEM_RDY 0xffffffff
+#define DEVM_ARAUX_COH BIT(19)
+#define DEVM_AWAUX_COH BIT(3)
+
+#define CFG_FORCE_LINK_STATUS_EN 0x229c
+#define FORCE_LINK_STATUS 0x22a0
+#define CFG_LINK_AGGR_RESUME 0x27c8
+#define RX_DV_GATE_REG 0x2dfc
+
+void xge_wr_csr(struct xge_pdata *pdata, u32 offset, u32 val);
+u32 xge_rd_csr(struct xge_pdata *pdata, u32 offset);
+int xge_port_reset(struct net_device *ndev);
+void xge_port_init(struct net_device *ndev);
+
+#endif /* __XGENE_ENET_V2_ENET__H__ */
diff --git a/drivers/net/ethernet/apm/xgene-v2/ethtool.c b/drivers/net/ethernet/apm/xgene-v2/ethtool.c
new file mode 100644
index 000000000..b78d1a99f
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/ethtool.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#include "main.h"
+
+#define XGE_STAT(m) { #m, offsetof(struct xge_pdata, stats.m) }
+#define XGE_EXTD_STAT(m, n) \
+ { \
+ #m, \
+ n, \
+ 0 \
+ }
+
+static const struct xge_gstrings_stats gstrings_stats[] = {
+ XGE_STAT(rx_packets),
+ XGE_STAT(tx_packets),
+ XGE_STAT(rx_bytes),
+ XGE_STAT(tx_bytes),
+ XGE_STAT(rx_errors)
+};
+
+static struct xge_gstrings_extd_stats gstrings_extd_stats[] = {
+ XGE_EXTD_STAT(tx_rx_64b_frame_cntr, TR64),
+ XGE_EXTD_STAT(tx_rx_127b_frame_cntr, TR127),
+ XGE_EXTD_STAT(tx_rx_255b_frame_cntr, TR255),
+ XGE_EXTD_STAT(tx_rx_511b_frame_cntr, TR511),
+ XGE_EXTD_STAT(tx_rx_1023b_frame_cntr, TR1K),
+ XGE_EXTD_STAT(tx_rx_1518b_frame_cntr, TRMAX),
+ XGE_EXTD_STAT(tx_rx_1522b_frame_cntr, TRMGV),
+ XGE_EXTD_STAT(rx_fcs_error_cntr, RFCS),
+ XGE_EXTD_STAT(rx_multicast_pkt_cntr, RMCA),
+ XGE_EXTD_STAT(rx_broadcast_pkt_cntr, RBCA),
+ XGE_EXTD_STAT(rx_ctrl_frame_pkt_cntr, RXCF),
+ XGE_EXTD_STAT(rx_pause_frame_pkt_cntr, RXPF),
+ XGE_EXTD_STAT(rx_unk_opcode_cntr, RXUO),
+ XGE_EXTD_STAT(rx_align_err_cntr, RALN),
+ XGE_EXTD_STAT(rx_frame_len_err_cntr, RFLR),
+ XGE_EXTD_STAT(rx_code_err_cntr, RCDE),
+ XGE_EXTD_STAT(rx_carrier_sense_err_cntr, RCSE),
+ XGE_EXTD_STAT(rx_undersize_pkt_cntr, RUND),
+ XGE_EXTD_STAT(rx_oversize_pkt_cntr, ROVR),
+ XGE_EXTD_STAT(rx_fragments_cntr, RFRG),
+ XGE_EXTD_STAT(rx_jabber_cntr, RJBR),
+ XGE_EXTD_STAT(rx_dropped_pkt_cntr, RDRP),
+ XGE_EXTD_STAT(tx_multicast_pkt_cntr, TMCA),
+ XGE_EXTD_STAT(tx_broadcast_pkt_cntr, TBCA),
+ XGE_EXTD_STAT(tx_pause_ctrl_frame_cntr, TXPF),
+ XGE_EXTD_STAT(tx_defer_pkt_cntr, TDFR),
+ XGE_EXTD_STAT(tx_excv_defer_pkt_cntr, TEDF),
+ XGE_EXTD_STAT(tx_single_col_pkt_cntr, TSCL),
+ XGE_EXTD_STAT(tx_multi_col_pkt_cntr, TMCL),
+ XGE_EXTD_STAT(tx_late_col_pkt_cntr, TLCL),
+ XGE_EXTD_STAT(tx_excv_col_pkt_cntr, TXCL),
+ XGE_EXTD_STAT(tx_total_col_cntr, TNCL),
+ XGE_EXTD_STAT(tx_pause_frames_hnrd_cntr, TPFH),
+ XGE_EXTD_STAT(tx_drop_frame_cntr, TDRP),
+ XGE_EXTD_STAT(tx_jabber_frame_cntr, TJBR),
+ XGE_EXTD_STAT(tx_fcs_error_cntr, TFCS),
+ XGE_EXTD_STAT(tx_ctrl_frame_cntr, TXCF),
+ XGE_EXTD_STAT(tx_oversize_frame_cntr, TOVR),
+ XGE_EXTD_STAT(tx_undersize_frame_cntr, TUND),
+ XGE_EXTD_STAT(tx_fragments_cntr, TFRG)
+};
+
+#define XGE_STATS_LEN ARRAY_SIZE(gstrings_stats)
+#define XGE_EXTD_STATS_LEN ARRAY_SIZE(gstrings_extd_stats)
+
+static void xge_mac_get_extd_stats(struct xge_pdata *pdata)
+{
+ u32 data;
+ int i;
+
+ for (i = 0; i < XGE_EXTD_STATS_LEN; i++) {
+ data = xge_rd_csr(pdata, gstrings_extd_stats[i].addr);
+ gstrings_extd_stats[i].value += data;
+ }
+}
+
+static void xge_get_drvinfo(struct net_device *ndev,
+ struct ethtool_drvinfo *info)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct platform_device *pdev = pdata->pdev;
+
+ strcpy(info->driver, "xgene-enet-v2");
+ sprintf(info->bus_info, "%s", pdev->name);
+}
+
+static void xge_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
+{
+ u8 *p = data;
+ int i;
+
+ if (stringset != ETH_SS_STATS)
+ return;
+
+ for (i = 0; i < XGE_STATS_LEN; i++) {
+ memcpy(p, gstrings_stats[i].name, ETH_GSTRING_LEN);
+ p += ETH_GSTRING_LEN;
+ }
+
+ for (i = 0; i < XGE_EXTD_STATS_LEN; i++) {
+ memcpy(p, gstrings_extd_stats[i].name, ETH_GSTRING_LEN);
+ p += ETH_GSTRING_LEN;
+ }
+}
+
+static int xge_get_sset_count(struct net_device *ndev, int sset)
+{
+ if (sset != ETH_SS_STATS)
+ return -EINVAL;
+
+ return XGE_STATS_LEN + XGE_EXTD_STATS_LEN;
+}
+
+static void xge_get_ethtool_stats(struct net_device *ndev,
+ struct ethtool_stats *dummy,
+ u64 *data)
+{
+ void *pdata = netdev_priv(ndev);
+ int i;
+
+ for (i = 0; i < XGE_STATS_LEN; i++)
+ *data++ = *(u64 *)(pdata + gstrings_stats[i].offset);
+
+ xge_mac_get_extd_stats(pdata);
+
+ for (i = 0; i < XGE_EXTD_STATS_LEN; i++)
+ *data++ = gstrings_extd_stats[i].value;
+}
+
+static int xge_get_link_ksettings(struct net_device *ndev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct phy_device *phydev = ndev->phydev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ phy_ethtool_ksettings_get(phydev, cmd);
+
+ return 0;
+}
+
+static int xge_set_link_ksettings(struct net_device *ndev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct phy_device *phydev = ndev->phydev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_ethtool_ksettings_set(phydev, cmd);
+}
+
+static const struct ethtool_ops xge_ethtool_ops = {
+ .get_drvinfo = xge_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_strings = xge_get_strings,
+ .get_sset_count = xge_get_sset_count,
+ .get_ethtool_stats = xge_get_ethtool_stats,
+ .get_link_ksettings = xge_get_link_ksettings,
+ .set_link_ksettings = xge_set_link_ksettings,
+};
+
+void xge_set_ethtool_ops(struct net_device *ndev)
+{
+ ndev->ethtool_ops = &xge_ethtool_ops;
+}
diff --git a/drivers/net/ethernet/apm/xgene-v2/ethtool.h b/drivers/net/ethernet/apm/xgene-v2/ethtool.h
new file mode 100644
index 000000000..8263b4aca
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/ethtool.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ */
+
+#ifndef __XGENE_ENET_V2_ETHTOOL_H__
+#define __XGENE_ENET_V2_ETHTOOL_H__
+
+struct xge_gstrings_stats {
+ char name[ETH_GSTRING_LEN];
+ int offset;
+};
+
+struct xge_gstrings_extd_stats {
+ char name[ETH_GSTRING_LEN];
+ u32 addr;
+ u32 value;
+};
+
+#define TR64 0xa080
+#define TR127 0xa084
+#define TR255 0xa088
+#define TR511 0xa08c
+#define TR1K 0xa090
+#define TRMAX 0xa094
+#define TRMGV 0xa098
+#define RFCS 0xa0a4
+#define RMCA 0xa0a8
+#define RBCA 0xa0ac
+#define RXCF 0xa0b0
+#define RXPF 0xa0b4
+#define RXUO 0xa0b8
+#define RALN 0xa0bc
+#define RFLR 0xa0c0
+#define RCDE 0xa0c4
+#define RCSE 0xa0c8
+#define RUND 0xa0cc
+#define ROVR 0xa0d0
+#define RFRG 0xa0d4
+#define RJBR 0xa0d8
+#define RDRP 0xa0dc
+#define TMCA 0xa0e8
+#define TBCA 0xa0ec
+#define TXPF 0xa0f0
+#define TDFR 0xa0f4
+#define TEDF 0xa0f8
+#define TSCL 0xa0fc
+#define TMCL 0xa100
+#define TLCL 0xa104
+#define TXCL 0xa108
+#define TNCL 0xa10c
+#define TPFH 0xa110
+#define TDRP 0xa114
+#define TJBR 0xa118
+#define TFCS 0xa11c
+#define TXCF 0xa120
+#define TOVR 0xa124
+#define TUND 0xa128
+#define TFRG 0xa12c
+
+void xge_set_ethtool_ops(struct net_device *ndev);
+
+#endif /* __XGENE_ENET_V2_ETHTOOL_H__ */
diff --git a/drivers/net/ethernet/apm/xgene-v2/mac.c b/drivers/net/ethernet/apm/xgene-v2/mac.c
new file mode 100644
index 000000000..6423e22e0
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/mac.c
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#include "main.h"
+
+void xge_mac_reset(struct xge_pdata *pdata)
+{
+ xge_wr_csr(pdata, MAC_CONFIG_1, SOFT_RESET);
+ xge_wr_csr(pdata, MAC_CONFIG_1, 0);
+}
+
+void xge_mac_set_speed(struct xge_pdata *pdata)
+{
+ u32 icm0, icm2, ecm0, mc2;
+ u32 intf_ctrl, rgmii;
+
+ icm0 = xge_rd_csr(pdata, ICM_CONFIG0_REG_0);
+ icm2 = xge_rd_csr(pdata, ICM_CONFIG2_REG_0);
+ ecm0 = xge_rd_csr(pdata, ECM_CONFIG0_REG_0);
+ rgmii = xge_rd_csr(pdata, RGMII_REG_0);
+ mc2 = xge_rd_csr(pdata, MAC_CONFIG_2);
+ intf_ctrl = xge_rd_csr(pdata, INTERFACE_CONTROL);
+ icm2 |= CFG_WAITASYNCRD_EN;
+
+ switch (pdata->phy_speed) {
+ case SPEED_10:
+ SET_REG_BITS(&mc2, INTF_MODE, 1);
+ SET_REG_BITS(&intf_ctrl, HD_MODE, 0);
+ SET_REG_BITS(&icm0, CFG_MACMODE, 0);
+ SET_REG_BITS(&icm2, CFG_WAITASYNCRD, 500);
+ SET_REG_BIT(&rgmii, CFG_SPEED_125, 0);
+ break;
+ case SPEED_100:
+ SET_REG_BITS(&mc2, INTF_MODE, 1);
+ SET_REG_BITS(&intf_ctrl, HD_MODE, 1);
+ SET_REG_BITS(&icm0, CFG_MACMODE, 1);
+ SET_REG_BITS(&icm2, CFG_WAITASYNCRD, 80);
+ SET_REG_BIT(&rgmii, CFG_SPEED_125, 0);
+ break;
+ default:
+ SET_REG_BITS(&mc2, INTF_MODE, 2);
+ SET_REG_BITS(&intf_ctrl, HD_MODE, 2);
+ SET_REG_BITS(&icm0, CFG_MACMODE, 2);
+ SET_REG_BITS(&icm2, CFG_WAITASYNCRD, 16);
+ SET_REG_BIT(&rgmii, CFG_SPEED_125, 1);
+ break;
+ }
+
+ mc2 |= FULL_DUPLEX | CRC_EN | PAD_CRC;
+ SET_REG_BITS(&ecm0, CFG_WFIFOFULLTHR, 0x32);
+
+ xge_wr_csr(pdata, MAC_CONFIG_2, mc2);
+ xge_wr_csr(pdata, INTERFACE_CONTROL, intf_ctrl);
+ xge_wr_csr(pdata, RGMII_REG_0, rgmii);
+ xge_wr_csr(pdata, ICM_CONFIG0_REG_0, icm0);
+ xge_wr_csr(pdata, ICM_CONFIG2_REG_0, icm2);
+ xge_wr_csr(pdata, ECM_CONFIG0_REG_0, ecm0);
+}
+
+void xge_mac_set_station_addr(struct xge_pdata *pdata)
+{
+ const u8 *dev_addr = pdata->ndev->dev_addr;
+ u32 addr0, addr1;
+
+ addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
+ (dev_addr[1] << 8) | dev_addr[0];
+ addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
+
+ xge_wr_csr(pdata, STATION_ADDR0, addr0);
+ xge_wr_csr(pdata, STATION_ADDR1, addr1);
+}
+
+void xge_mac_init(struct xge_pdata *pdata)
+{
+ xge_mac_reset(pdata);
+ xge_mac_set_speed(pdata);
+ xge_mac_set_station_addr(pdata);
+}
+
+void xge_mac_enable(struct xge_pdata *pdata)
+{
+ u32 data;
+
+ data = xge_rd_csr(pdata, MAC_CONFIG_1);
+ data |= TX_EN | RX_EN;
+ xge_wr_csr(pdata, MAC_CONFIG_1, data);
+
+ data = xge_rd_csr(pdata, MAC_CONFIG_1);
+}
+
+void xge_mac_disable(struct xge_pdata *pdata)
+{
+ u32 data;
+
+ data = xge_rd_csr(pdata, MAC_CONFIG_1);
+ data &= ~(TX_EN | RX_EN);
+ xge_wr_csr(pdata, MAC_CONFIG_1, data);
+}
diff --git a/drivers/net/ethernet/apm/xgene-v2/mac.h b/drivers/net/ethernet/apm/xgene-v2/mac.h
new file mode 100644
index 000000000..7392f6066
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/mac.h
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#ifndef __XGENE_ENET_V2_MAC_H__
+#define __XGENE_ENET_V2_MAC_H__
+
+/* Register offsets */
+#define MAC_CONFIG_1 0xa000
+#define MAC_CONFIG_2 0xa004
+#define MII_MGMT_CONFIG 0xa020
+#define MII_MGMT_COMMAND 0xa024
+#define MII_MGMT_ADDRESS 0xa028
+#define MII_MGMT_CONTROL 0xa02c
+#define MII_MGMT_STATUS 0xa030
+#define MII_MGMT_INDICATORS 0xa034
+#define INTERFACE_CONTROL 0xa038
+#define STATION_ADDR0 0xa040
+#define STATION_ADDR1 0xa044
+
+#define RGMII_REG_0 0x27e0
+#define ICM_CONFIG0_REG_0 0x2c00
+#define ICM_CONFIG2_REG_0 0x2c08
+#define ECM_CONFIG0_REG_0 0x2d00
+
+/* Register fields */
+#define SOFT_RESET BIT(31)
+#define TX_EN BIT(0)
+#define RX_EN BIT(2)
+#define PAD_CRC BIT(2)
+#define CRC_EN BIT(1)
+#define FULL_DUPLEX BIT(0)
+
+#define INTF_MODE_POS 8
+#define INTF_MODE_LEN 2
+#define HD_MODE_POS 25
+#define HD_MODE_LEN 2
+#define CFG_MACMODE_POS 18
+#define CFG_MACMODE_LEN 2
+#define CFG_WAITASYNCRD_POS 0
+#define CFG_WAITASYNCRD_LEN 16
+#define CFG_SPEED_125_POS 24
+#define CFG_WFIFOFULLTHR_POS 0
+#define CFG_WFIFOFULLTHR_LEN 7
+#define MGMT_CLOCK_SEL_POS 0
+#define MGMT_CLOCK_SEL_LEN 3
+#define PHY_ADDR_POS 8
+#define PHY_ADDR_LEN 5
+#define REG_ADDR_POS 0
+#define REG_ADDR_LEN 5
+#define MII_MGMT_BUSY BIT(0)
+#define MII_READ_CYCLE BIT(0)
+#define CFG_WAITASYNCRD_EN BIT(16)
+
+static inline void xgene_set_reg_bits(u32 *var, int pos, int len, u32 val)
+{
+ u32 mask = GENMASK(pos + len, pos);
+
+ *var &= ~mask;
+ *var |= ((val << pos) & mask);
+}
+
+static inline u32 xgene_get_reg_bits(u32 var, int pos, int len)
+{
+ u32 mask = GENMASK(pos + len, pos);
+
+ return (var & mask) >> pos;
+}
+
+#define SET_REG_BITS(var, field, val) \
+ xgene_set_reg_bits(var, field ## _POS, field ## _LEN, val)
+
+#define SET_REG_BIT(var, field, val) \
+ xgene_set_reg_bits(var, field ## _POS, 1, val)
+
+#define GET_REG_BITS(var, field) \
+ xgene_get_reg_bits(var, field ## _POS, field ## _LEN)
+
+#define GET_REG_BIT(var, field) ((var) & (field))
+
+struct xge_pdata;
+
+void xge_mac_reset(struct xge_pdata *pdata);
+void xge_mac_set_speed(struct xge_pdata *pdata);
+void xge_mac_enable(struct xge_pdata *pdata);
+void xge_mac_disable(struct xge_pdata *pdata);
+void xge_mac_init(struct xge_pdata *pdata);
+void xge_mac_set_station_addr(struct xge_pdata *pdata);
+
+#endif /* __XGENE_ENET_V2_MAC_H__ */
diff --git a/drivers/net/ethernet/apm/xgene-v2/main.c b/drivers/net/ethernet/apm/xgene-v2/main.c
new file mode 100644
index 000000000..379d19d18
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/main.c
@@ -0,0 +1,746 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#include "main.h"
+
+static const struct acpi_device_id xge_acpi_match[];
+
+static int xge_get_resources(struct xge_pdata *pdata)
+{
+ struct platform_device *pdev;
+ struct net_device *ndev;
+ int phy_mode, ret = 0;
+ struct resource *res;
+ struct device *dev;
+
+ pdev = pdata->pdev;
+ dev = &pdev->dev;
+ ndev = pdata->ndev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "Resource enet_csr not defined\n");
+ return -ENODEV;
+ }
+
+ pdata->resources.base_addr = devm_ioremap(dev, res->start,
+ resource_size(res));
+ if (!pdata->resources.base_addr) {
+ dev_err(dev, "Unable to retrieve ENET Port CSR region\n");
+ return -ENOMEM;
+ }
+
+ if (device_get_ethdev_address(dev, ndev))
+ eth_hw_addr_random(ndev);
+
+ memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len);
+
+ phy_mode = device_get_phy_mode(dev);
+ if (phy_mode < 0) {
+ dev_err(dev, "Unable to get phy-connection-type\n");
+ return phy_mode;
+ }
+ pdata->resources.phy_mode = phy_mode;
+
+ if (pdata->resources.phy_mode != PHY_INTERFACE_MODE_RGMII) {
+ dev_err(dev, "Incorrect phy-connection-type specified\n");
+ return -ENODEV;
+ }
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ return ret;
+ pdata->resources.irq = ret;
+
+ return 0;
+}
+
+static int xge_refill_buffers(struct net_device *ndev, u32 nbuf)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct xge_desc_ring *ring = pdata->rx_ring;
+ const u8 slots = XGENE_ENET_NUM_DESC - 1;
+ struct device *dev = &pdata->pdev->dev;
+ struct xge_raw_desc *raw_desc;
+ u64 addr_lo, addr_hi;
+ u8 tail = ring->tail;
+ struct sk_buff *skb;
+ dma_addr_t dma_addr;
+ u16 len;
+ int i;
+
+ for (i = 0; i < nbuf; i++) {
+ raw_desc = &ring->raw_desc[tail];
+
+ len = XGENE_ENET_STD_MTU;
+ skb = netdev_alloc_skb(ndev, len);
+ if (unlikely(!skb))
+ return -ENOMEM;
+
+ dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE);
+ if (dma_mapping_error(dev, dma_addr)) {
+ netdev_err(ndev, "DMA mapping error\n");
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ ring->pkt_info[tail].skb = skb;
+ ring->pkt_info[tail].dma_addr = dma_addr;
+
+ addr_hi = GET_BITS(NEXT_DESC_ADDRH, le64_to_cpu(raw_desc->m1));
+ addr_lo = GET_BITS(NEXT_DESC_ADDRL, le64_to_cpu(raw_desc->m1));
+ raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, addr_lo) |
+ SET_BITS(NEXT_DESC_ADDRH, addr_hi) |
+ SET_BITS(PKT_ADDRH,
+ upper_32_bits(dma_addr)));
+
+ dma_wmb();
+ raw_desc->m0 = cpu_to_le64(SET_BITS(PKT_ADDRL, dma_addr) |
+ SET_BITS(E, 1));
+ tail = (tail + 1) & slots;
+ }
+
+ ring->tail = tail;
+
+ return 0;
+}
+
+static int xge_init_hw(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ int ret;
+
+ ret = xge_port_reset(ndev);
+ if (ret)
+ return ret;
+
+ xge_port_init(ndev);
+ pdata->nbufs = NUM_BUFS;
+
+ return 0;
+}
+
+static irqreturn_t xge_irq(const int irq, void *data)
+{
+ struct xge_pdata *pdata = data;
+
+ if (napi_schedule_prep(&pdata->napi)) {
+ xge_intr_disable(pdata);
+ __napi_schedule(&pdata->napi);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int xge_request_irq(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ int ret;
+
+ snprintf(pdata->irq_name, IRQ_ID_SIZE, "%s", ndev->name);
+
+ ret = request_irq(pdata->resources.irq, xge_irq, 0, pdata->irq_name,
+ pdata);
+ if (ret)
+ netdev_err(ndev, "Failed to request irq %s\n", pdata->irq_name);
+
+ return ret;
+}
+
+static void xge_free_irq(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+
+ free_irq(pdata->resources.irq, pdata);
+}
+
+static bool is_tx_slot_available(struct xge_raw_desc *raw_desc)
+{
+ if (GET_BITS(E, le64_to_cpu(raw_desc->m0)) &&
+ (GET_BITS(PKT_SIZE, le64_to_cpu(raw_desc->m0)) == SLOT_EMPTY))
+ return true;
+
+ return false;
+}
+
+static netdev_tx_t xge_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ struct xge_desc_ring *tx_ring;
+ struct xge_raw_desc *raw_desc;
+ static dma_addr_t dma_addr;
+ u64 addr_lo, addr_hi;
+ void *pkt_buf;
+ u8 tail;
+ u16 len;
+
+ tx_ring = pdata->tx_ring;
+ tail = tx_ring->tail;
+ len = skb_headlen(skb);
+ raw_desc = &tx_ring->raw_desc[tail];
+
+ if (!is_tx_slot_available(raw_desc)) {
+ netif_stop_queue(ndev);
+ return NETDEV_TX_BUSY;
+ }
+
+ /* Packet buffers should be 64B aligned */
+ pkt_buf = dma_alloc_coherent(dev, XGENE_ENET_STD_MTU, &dma_addr,
+ GFP_ATOMIC);
+ if (unlikely(!pkt_buf)) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+ memcpy(pkt_buf, skb->data, len);
+
+ addr_hi = GET_BITS(NEXT_DESC_ADDRH, le64_to_cpu(raw_desc->m1));
+ addr_lo = GET_BITS(NEXT_DESC_ADDRL, le64_to_cpu(raw_desc->m1));
+ raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, addr_lo) |
+ SET_BITS(NEXT_DESC_ADDRH, addr_hi) |
+ SET_BITS(PKT_ADDRH,
+ upper_32_bits(dma_addr)));
+
+ tx_ring->pkt_info[tail].skb = skb;
+ tx_ring->pkt_info[tail].dma_addr = dma_addr;
+ tx_ring->pkt_info[tail].pkt_buf = pkt_buf;
+
+ dma_wmb();
+
+ raw_desc->m0 = cpu_to_le64(SET_BITS(PKT_ADDRL, dma_addr) |
+ SET_BITS(PKT_SIZE, len) |
+ SET_BITS(E, 0));
+ skb_tx_timestamp(skb);
+ xge_wr_csr(pdata, DMATXCTRL, 1);
+
+ tx_ring->tail = (tail + 1) & (XGENE_ENET_NUM_DESC - 1);
+
+ return NETDEV_TX_OK;
+}
+
+static bool is_tx_hw_done(struct xge_raw_desc *raw_desc)
+{
+ if (GET_BITS(E, le64_to_cpu(raw_desc->m0)) &&
+ !GET_BITS(PKT_SIZE, le64_to_cpu(raw_desc->m0)))
+ return true;
+
+ return false;
+}
+
+static void xge_txc_poll(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ struct xge_desc_ring *tx_ring;
+ struct xge_raw_desc *raw_desc;
+ dma_addr_t dma_addr;
+ struct sk_buff *skb;
+ void *pkt_buf;
+ u32 data;
+ u8 head;
+
+ tx_ring = pdata->tx_ring;
+ head = tx_ring->head;
+
+ data = xge_rd_csr(pdata, DMATXSTATUS);
+ if (!GET_BITS(TXPKTCOUNT, data))
+ return;
+
+ while (1) {
+ raw_desc = &tx_ring->raw_desc[head];
+
+ if (!is_tx_hw_done(raw_desc))
+ break;
+
+ dma_rmb();
+
+ skb = tx_ring->pkt_info[head].skb;
+ dma_addr = tx_ring->pkt_info[head].dma_addr;
+ pkt_buf = tx_ring->pkt_info[head].pkt_buf;
+ pdata->stats.tx_packets++;
+ pdata->stats.tx_bytes += skb->len;
+ dma_free_coherent(dev, XGENE_ENET_STD_MTU, pkt_buf, dma_addr);
+ dev_kfree_skb_any(skb);
+
+ /* clear pktstart address and pktsize */
+ raw_desc->m0 = cpu_to_le64(SET_BITS(E, 1) |
+ SET_BITS(PKT_SIZE, SLOT_EMPTY));
+ xge_wr_csr(pdata, DMATXSTATUS, 1);
+
+ head = (head + 1) & (XGENE_ENET_NUM_DESC - 1);
+ }
+
+ if (netif_queue_stopped(ndev))
+ netif_wake_queue(ndev);
+
+ tx_ring->head = head;
+}
+
+static int xge_rx_poll(struct net_device *ndev, unsigned int budget)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ struct xge_desc_ring *rx_ring;
+ struct xge_raw_desc *raw_desc;
+ struct sk_buff *skb;
+ dma_addr_t dma_addr;
+ int processed = 0;
+ u8 head, rx_error;
+ int i, ret;
+ u32 data;
+ u16 len;
+
+ rx_ring = pdata->rx_ring;
+ head = rx_ring->head;
+
+ data = xge_rd_csr(pdata, DMARXSTATUS);
+ if (!GET_BITS(RXPKTCOUNT, data))
+ return 0;
+
+ for (i = 0; i < budget; i++) {
+ raw_desc = &rx_ring->raw_desc[head];
+
+ if (GET_BITS(E, le64_to_cpu(raw_desc->m0)))
+ break;
+
+ dma_rmb();
+
+ skb = rx_ring->pkt_info[head].skb;
+ rx_ring->pkt_info[head].skb = NULL;
+ dma_addr = rx_ring->pkt_info[head].dma_addr;
+ len = GET_BITS(PKT_SIZE, le64_to_cpu(raw_desc->m0));
+ dma_unmap_single(dev, dma_addr, XGENE_ENET_STD_MTU,
+ DMA_FROM_DEVICE);
+
+ rx_error = GET_BITS(D, le64_to_cpu(raw_desc->m2));
+ if (unlikely(rx_error)) {
+ pdata->stats.rx_errors++;
+ dev_kfree_skb_any(skb);
+ goto out;
+ }
+
+ skb_put(skb, len);
+ skb->protocol = eth_type_trans(skb, ndev);
+
+ pdata->stats.rx_packets++;
+ pdata->stats.rx_bytes += len;
+ napi_gro_receive(&pdata->napi, skb);
+out:
+ ret = xge_refill_buffers(ndev, 1);
+ xge_wr_csr(pdata, DMARXSTATUS, 1);
+ xge_wr_csr(pdata, DMARXCTRL, 1);
+
+ if (ret)
+ break;
+
+ head = (head + 1) & (XGENE_ENET_NUM_DESC - 1);
+ processed++;
+ }
+
+ rx_ring->head = head;
+
+ return processed;
+}
+
+static void xge_delete_desc_ring(struct net_device *ndev,
+ struct xge_desc_ring *ring)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ u16 size;
+
+ if (!ring)
+ return;
+
+ size = XGENE_ENET_DESC_SIZE * XGENE_ENET_NUM_DESC;
+ if (ring->desc_addr)
+ dma_free_coherent(dev, size, ring->desc_addr, ring->dma_addr);
+
+ kfree(ring->pkt_info);
+ kfree(ring);
+}
+
+static void xge_free_buffers(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct xge_desc_ring *ring = pdata->rx_ring;
+ struct device *dev = &pdata->pdev->dev;
+ struct sk_buff *skb;
+ dma_addr_t dma_addr;
+ int i;
+
+ for (i = 0; i < XGENE_ENET_NUM_DESC; i++) {
+ skb = ring->pkt_info[i].skb;
+ dma_addr = ring->pkt_info[i].dma_addr;
+
+ if (!skb)
+ continue;
+
+ dma_unmap_single(dev, dma_addr, XGENE_ENET_STD_MTU,
+ DMA_FROM_DEVICE);
+ dev_kfree_skb_any(skb);
+ }
+}
+
+static void xge_delete_desc_rings(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+
+ xge_txc_poll(ndev);
+ xge_delete_desc_ring(ndev, pdata->tx_ring);
+
+ xge_rx_poll(ndev, 64);
+ xge_free_buffers(ndev);
+ xge_delete_desc_ring(ndev, pdata->rx_ring);
+}
+
+static struct xge_desc_ring *xge_create_desc_ring(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ struct xge_desc_ring *ring;
+ u16 size;
+
+ ring = kzalloc(sizeof(*ring), GFP_KERNEL);
+ if (!ring)
+ return NULL;
+
+ ring->ndev = ndev;
+
+ size = XGENE_ENET_DESC_SIZE * XGENE_ENET_NUM_DESC;
+ ring->desc_addr = dma_alloc_coherent(dev, size, &ring->dma_addr,
+ GFP_KERNEL);
+ if (!ring->desc_addr)
+ goto err;
+
+ ring->pkt_info = kcalloc(XGENE_ENET_NUM_DESC, sizeof(*ring->pkt_info),
+ GFP_KERNEL);
+ if (!ring->pkt_info)
+ goto err;
+
+ xge_setup_desc(ring);
+
+ return ring;
+
+err:
+ xge_delete_desc_ring(ndev, ring);
+
+ return NULL;
+}
+
+static int xge_create_desc_rings(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct xge_desc_ring *ring;
+ int ret;
+
+ /* create tx ring */
+ ring = xge_create_desc_ring(ndev);
+ if (!ring)
+ goto err;
+
+ pdata->tx_ring = ring;
+ xge_update_tx_desc_addr(pdata);
+
+ /* create rx ring */
+ ring = xge_create_desc_ring(ndev);
+ if (!ring)
+ goto err;
+
+ pdata->rx_ring = ring;
+ xge_update_rx_desc_addr(pdata);
+
+ ret = xge_refill_buffers(ndev, XGENE_ENET_NUM_DESC);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ xge_delete_desc_rings(ndev);
+
+ return -ENOMEM;
+}
+
+static int xge_open(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ int ret;
+
+ ret = xge_create_desc_rings(ndev);
+ if (ret)
+ return ret;
+
+ napi_enable(&pdata->napi);
+ ret = xge_request_irq(ndev);
+ if (ret)
+ return ret;
+
+ xge_intr_enable(pdata);
+ xge_wr_csr(pdata, DMARXCTRL, 1);
+
+ phy_start(ndev->phydev);
+ xge_mac_enable(pdata);
+ netif_start_queue(ndev);
+
+ return 0;
+}
+
+static int xge_close(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+
+ netif_stop_queue(ndev);
+ xge_mac_disable(pdata);
+ phy_stop(ndev->phydev);
+
+ xge_intr_disable(pdata);
+ xge_free_irq(ndev);
+ napi_disable(&pdata->napi);
+ xge_delete_desc_rings(ndev);
+
+ return 0;
+}
+
+static int xge_napi(struct napi_struct *napi, const int budget)
+{
+ struct net_device *ndev = napi->dev;
+ struct xge_pdata *pdata;
+ int processed;
+
+ pdata = netdev_priv(ndev);
+
+ xge_txc_poll(ndev);
+ processed = xge_rx_poll(ndev, budget);
+
+ if (processed < budget) {
+ napi_complete_done(napi, processed);
+ xge_intr_enable(pdata);
+ }
+
+ return processed;
+}
+
+static int xge_set_mac_addr(struct net_device *ndev, void *addr)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ int ret;
+
+ ret = eth_mac_addr(ndev, addr);
+ if (ret)
+ return ret;
+
+ xge_mac_set_station_addr(pdata);
+
+ return 0;
+}
+
+static bool is_tx_pending(struct xge_raw_desc *raw_desc)
+{
+ if (!GET_BITS(E, le64_to_cpu(raw_desc->m0)))
+ return true;
+
+ return false;
+}
+
+static void xge_free_pending_skb(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ struct xge_desc_ring *tx_ring;
+ struct xge_raw_desc *raw_desc;
+ dma_addr_t dma_addr;
+ struct sk_buff *skb;
+ void *pkt_buf;
+ int i;
+
+ tx_ring = pdata->tx_ring;
+
+ for (i = 0; i < XGENE_ENET_NUM_DESC; i++) {
+ raw_desc = &tx_ring->raw_desc[i];
+
+ if (!is_tx_pending(raw_desc))
+ continue;
+
+ skb = tx_ring->pkt_info[i].skb;
+ dma_addr = tx_ring->pkt_info[i].dma_addr;
+ pkt_buf = tx_ring->pkt_info[i].pkt_buf;
+ dma_free_coherent(dev, XGENE_ENET_STD_MTU, pkt_buf, dma_addr);
+ dev_kfree_skb_any(skb);
+ }
+}
+
+static void xge_timeout(struct net_device *ndev, unsigned int txqueue)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+
+ rtnl_lock();
+
+ if (!netif_running(ndev))
+ goto out;
+
+ netif_stop_queue(ndev);
+ xge_intr_disable(pdata);
+ napi_disable(&pdata->napi);
+
+ xge_wr_csr(pdata, DMATXCTRL, 0);
+ xge_txc_poll(ndev);
+ xge_free_pending_skb(ndev);
+ xge_wr_csr(pdata, DMATXSTATUS, ~0U);
+
+ xge_setup_desc(pdata->tx_ring);
+ xge_update_tx_desc_addr(pdata);
+ xge_mac_init(pdata);
+
+ napi_enable(&pdata->napi);
+ xge_intr_enable(pdata);
+ xge_mac_enable(pdata);
+ netif_start_queue(ndev);
+
+out:
+ rtnl_unlock();
+}
+
+static void xge_get_stats64(struct net_device *ndev,
+ struct rtnl_link_stats64 *storage)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct xge_stats *stats = &pdata->stats;
+
+ storage->tx_packets += stats->tx_packets;
+ storage->tx_bytes += stats->tx_bytes;
+
+ storage->rx_packets += stats->rx_packets;
+ storage->rx_bytes += stats->rx_bytes;
+ storage->rx_errors += stats->rx_errors;
+}
+
+static const struct net_device_ops xgene_ndev_ops = {
+ .ndo_open = xge_open,
+ .ndo_stop = xge_close,
+ .ndo_start_xmit = xge_start_xmit,
+ .ndo_set_mac_address = xge_set_mac_addr,
+ .ndo_tx_timeout = xge_timeout,
+ .ndo_get_stats64 = xge_get_stats64,
+};
+
+static int xge_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct net_device *ndev;
+ struct xge_pdata *pdata;
+ int ret;
+
+ ndev = alloc_etherdev(sizeof(*pdata));
+ if (!ndev)
+ return -ENOMEM;
+
+ pdata = netdev_priv(ndev);
+
+ pdata->pdev = pdev;
+ pdata->ndev = ndev;
+ SET_NETDEV_DEV(ndev, dev);
+ platform_set_drvdata(pdev, pdata);
+ ndev->netdev_ops = &xgene_ndev_ops;
+
+ ndev->features |= NETIF_F_GSO |
+ NETIF_F_GRO;
+
+ ret = xge_get_resources(pdata);
+ if (ret)
+ goto err;
+
+ ndev->hw_features = ndev->features;
+ xge_set_ethtool_ops(ndev);
+
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
+ if (ret) {
+ netdev_err(ndev, "No usable DMA configuration\n");
+ goto err;
+ }
+
+ ret = xge_init_hw(ndev);
+ if (ret)
+ goto err;
+
+ ret = xge_mdio_config(ndev);
+ if (ret)
+ goto err;
+
+ netif_napi_add(ndev, &pdata->napi, xge_napi);
+
+ ret = register_netdev(ndev);
+ if (ret) {
+ netdev_err(ndev, "Failed to register netdev\n");
+ goto err_mdio_remove;
+ }
+
+ return 0;
+
+err_mdio_remove:
+ xge_mdio_remove(ndev);
+err:
+ free_netdev(ndev);
+
+ return ret;
+}
+
+static int xge_remove(struct platform_device *pdev)
+{
+ struct xge_pdata *pdata;
+ struct net_device *ndev;
+
+ pdata = platform_get_drvdata(pdev);
+ ndev = pdata->ndev;
+
+ rtnl_lock();
+ if (netif_running(ndev))
+ dev_close(ndev);
+ rtnl_unlock();
+
+ xge_mdio_remove(ndev);
+ unregister_netdev(ndev);
+ free_netdev(ndev);
+
+ return 0;
+}
+
+static void xge_shutdown(struct platform_device *pdev)
+{
+ struct xge_pdata *pdata;
+
+ pdata = platform_get_drvdata(pdev);
+ if (!pdata)
+ return;
+
+ if (!pdata->ndev)
+ return;
+
+ xge_remove(pdev);
+}
+
+static const struct acpi_device_id xge_acpi_match[] = {
+ { "APMC0D80" },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, xge_acpi_match);
+
+static struct platform_driver xge_driver = {
+ .driver = {
+ .name = "xgene-enet-v2",
+ .acpi_match_table = ACPI_PTR(xge_acpi_match),
+ },
+ .probe = xge_probe,
+ .remove = xge_remove,
+ .shutdown = xge_shutdown,
+};
+module_platform_driver(xge_driver);
+
+MODULE_DESCRIPTION("APM X-Gene SoC Ethernet v2 driver");
+MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/apm/xgene-v2/main.h b/drivers/net/ethernet/apm/xgene-v2/main.h
new file mode 100644
index 000000000..b3985a7be
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/main.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#ifndef __XGENE_ENET_V2_MAIN_H__
+#define __XGENE_ENET_V2_MAIN_H__
+
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/efi.h>
+#include <linux/if_vlan.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/prefetch.h>
+#include <linux/phy.h>
+#include <net/ip.h>
+#include "mac.h"
+#include "enet.h"
+#include "ring.h"
+#include "ethtool.h"
+
+#define XGENE_ENET_STD_MTU 1536
+#define XGENE_ENET_MIN_FRAME 60
+#define IRQ_ID_SIZE 16
+
+struct xge_resource {
+ void __iomem *base_addr;
+ int phy_mode;
+ u32 irq;
+};
+
+struct xge_stats {
+ u64 tx_packets;
+ u64 tx_bytes;
+ u64 rx_packets;
+ u64 rx_bytes;
+ u64 rx_errors;
+};
+
+/* ethernet private data */
+struct xge_pdata {
+ struct xge_resource resources;
+ struct xge_desc_ring *tx_ring;
+ struct xge_desc_ring *rx_ring;
+ struct platform_device *pdev;
+ char irq_name[IRQ_ID_SIZE];
+ struct mii_bus *mdio_bus;
+ struct net_device *ndev;
+ struct napi_struct napi;
+ struct xge_stats stats;
+ int phy_speed;
+ u8 nbufs;
+};
+
+int xge_mdio_config(struct net_device *ndev);
+void xge_mdio_remove(struct net_device *ndev);
+
+#endif /* __XGENE_ENET_V2_MAIN_H__ */
diff --git a/drivers/net/ethernet/apm/xgene-v2/mdio.c b/drivers/net/ethernet/apm/xgene-v2/mdio.c
new file mode 100644
index 000000000..eba06831a
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/mdio.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#include "main.h"
+
+static int xge_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 data)
+{
+ struct xge_pdata *pdata = bus->priv;
+ u32 done, val = 0;
+ u8 wait = 10;
+
+ SET_REG_BITS(&val, PHY_ADDR, phy_id);
+ SET_REG_BITS(&val, REG_ADDR, reg);
+ xge_wr_csr(pdata, MII_MGMT_ADDRESS, val);
+
+ xge_wr_csr(pdata, MII_MGMT_CONTROL, data);
+ do {
+ usleep_range(5, 10);
+ done = xge_rd_csr(pdata, MII_MGMT_INDICATORS);
+ } while ((done & MII_MGMT_BUSY) && wait--);
+
+ if (done & MII_MGMT_BUSY) {
+ dev_err(&bus->dev, "MII_MGMT write failed\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int xge_mdio_read(struct mii_bus *bus, int phy_id, int reg)
+{
+ struct xge_pdata *pdata = bus->priv;
+ u32 data, done, val = 0;
+ u8 wait = 10;
+
+ SET_REG_BITS(&val, PHY_ADDR, phy_id);
+ SET_REG_BITS(&val, REG_ADDR, reg);
+ xge_wr_csr(pdata, MII_MGMT_ADDRESS, val);
+
+ xge_wr_csr(pdata, MII_MGMT_COMMAND, MII_READ_CYCLE);
+ do {
+ usleep_range(5, 10);
+ done = xge_rd_csr(pdata, MII_MGMT_INDICATORS);
+ } while ((done & MII_MGMT_BUSY) && wait--);
+
+ if (done & MII_MGMT_BUSY) {
+ dev_err(&bus->dev, "MII_MGMT read failed\n");
+ return -ETIMEDOUT;
+ }
+
+ data = xge_rd_csr(pdata, MII_MGMT_STATUS);
+ xge_wr_csr(pdata, MII_MGMT_COMMAND, 0);
+
+ return data;
+}
+
+static void xge_adjust_link(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct phy_device *phydev = ndev->phydev;
+
+ if (phydev->link) {
+ if (pdata->phy_speed != phydev->speed) {
+ pdata->phy_speed = phydev->speed;
+ xge_mac_set_speed(pdata);
+ xge_mac_enable(pdata);
+ phy_print_status(phydev);
+ }
+ } else {
+ if (pdata->phy_speed != SPEED_UNKNOWN) {
+ pdata->phy_speed = SPEED_UNKNOWN;
+ xge_mac_disable(pdata);
+ phy_print_status(phydev);
+ }
+ }
+}
+
+void xge_mdio_remove(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct mii_bus *mdio_bus = pdata->mdio_bus;
+
+ if (ndev->phydev)
+ phy_disconnect(ndev->phydev);
+
+ if (mdio_bus->state == MDIOBUS_REGISTERED)
+ mdiobus_unregister(mdio_bus);
+
+ mdiobus_free(mdio_bus);
+}
+
+int xge_mdio_config(struct net_device *ndev)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ struct mii_bus *mdio_bus;
+ struct phy_device *phydev;
+ int ret;
+
+ mdio_bus = mdiobus_alloc();
+ if (!mdio_bus)
+ return -ENOMEM;
+
+ mdio_bus->name = "APM X-Gene Ethernet (v2) MDIO Bus";
+ mdio_bus->read = xge_mdio_read;
+ mdio_bus->write = xge_mdio_write;
+ mdio_bus->priv = pdata;
+ mdio_bus->parent = dev;
+ snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(dev));
+ pdata->mdio_bus = mdio_bus;
+
+ mdio_bus->phy_mask = 0x1;
+ ret = mdiobus_register(mdio_bus);
+ if (ret)
+ goto err;
+
+ phydev = phy_find_first(mdio_bus);
+ if (!phydev) {
+ dev_err(dev, "no PHY found\n");
+ ret = -ENODEV;
+ goto err;
+ }
+ phydev = phy_connect(ndev, phydev_name(phydev),
+ &xge_adjust_link,
+ pdata->resources.phy_mode);
+
+ if (IS_ERR(phydev)) {
+ netdev_err(ndev, "Could not attach to PHY\n");
+ ret = PTR_ERR(phydev);
+ goto err;
+ }
+
+ linkmode_set_bit_array(phy_10_100_features_array,
+ ARRAY_SIZE(phy_10_100_features_array),
+ mask);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, mask);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_AUI_BIT, mask);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_MII_BIT, mask);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, mask);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_BNC_BIT, mask);
+
+ linkmode_andnot(phydev->supported, phydev->supported, mask);
+ linkmode_copy(phydev->advertising, phydev->supported);
+ pdata->phy_speed = SPEED_UNKNOWN;
+
+ return 0;
+err:
+ xge_mdio_remove(ndev);
+
+ return ret;
+}
diff --git a/drivers/net/ethernet/apm/xgene-v2/ring.c b/drivers/net/ethernet/apm/xgene-v2/ring.c
new file mode 100644
index 000000000..fbea4bc43
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/ring.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#include "main.h"
+
+/* create circular linked list of descriptors */
+void xge_setup_desc(struct xge_desc_ring *ring)
+{
+ struct xge_raw_desc *raw_desc;
+ dma_addr_t dma_h, next_dma;
+ u16 offset;
+ int i;
+
+ for (i = 0; i < XGENE_ENET_NUM_DESC; i++) {
+ raw_desc = &ring->raw_desc[i];
+
+ offset = (i + 1) & (XGENE_ENET_NUM_DESC - 1);
+ next_dma = ring->dma_addr + (offset * XGENE_ENET_DESC_SIZE);
+
+ raw_desc->m0 = cpu_to_le64(SET_BITS(E, 1) |
+ SET_BITS(PKT_SIZE, SLOT_EMPTY));
+ dma_h = upper_32_bits(next_dma);
+ raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, next_dma) |
+ SET_BITS(NEXT_DESC_ADDRH, dma_h));
+ }
+}
+
+void xge_update_tx_desc_addr(struct xge_pdata *pdata)
+{
+ struct xge_desc_ring *ring = pdata->tx_ring;
+ dma_addr_t dma_addr = ring->dma_addr;
+
+ xge_wr_csr(pdata, DMATXDESCL, dma_addr);
+ xge_wr_csr(pdata, DMATXDESCH, upper_32_bits(dma_addr));
+
+ ring->head = 0;
+ ring->tail = 0;
+}
+
+void xge_update_rx_desc_addr(struct xge_pdata *pdata)
+{
+ struct xge_desc_ring *ring = pdata->rx_ring;
+ dma_addr_t dma_addr = ring->dma_addr;
+
+ xge_wr_csr(pdata, DMARXDESCL, dma_addr);
+ xge_wr_csr(pdata, DMARXDESCH, upper_32_bits(dma_addr));
+
+ ring->head = 0;
+ ring->tail = 0;
+}
+
+void xge_intr_enable(struct xge_pdata *pdata)
+{
+ u32 data;
+
+ data = RX_PKT_RCVD | TX_PKT_SENT;
+ xge_wr_csr(pdata, DMAINTRMASK, data);
+}
+
+void xge_intr_disable(struct xge_pdata *pdata)
+{
+ xge_wr_csr(pdata, DMAINTRMASK, 0);
+}
diff --git a/drivers/net/ethernet/apm/xgene-v2/ring.h b/drivers/net/ethernet/apm/xgene-v2/ring.h
new file mode 100644
index 000000000..2fd25553d
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/ring.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@apm.com>
+ * Keyur Chudgar <kchudgar@apm.com>
+ */
+
+#ifndef __XGENE_ENET_V2_RING_H__
+#define __XGENE_ENET_V2_RING_H__
+
+#define XGENE_ENET_DESC_SIZE 64
+#define XGENE_ENET_NUM_DESC 256
+#define NUM_BUFS 8
+#define SLOT_EMPTY 0xfff
+
+#define DMATXCTRL 0xa180
+#define DMATXDESCL 0xa184
+#define DMATXDESCH 0xa1a0
+#define DMATXSTATUS 0xa188
+#define DMARXCTRL 0xa18c
+#define DMARXDESCL 0xa190
+#define DMARXDESCH 0xa1a4
+#define DMARXSTATUS 0xa194
+#define DMAINTRMASK 0xa198
+#define DMAINTERRUPT 0xa19c
+
+#define D_POS 62
+#define D_LEN 2
+#define E_POS 63
+#define E_LEN 1
+#define PKT_ADDRL_POS 0
+#define PKT_ADDRL_LEN 32
+#define PKT_ADDRH_POS 32
+#define PKT_ADDRH_LEN 10
+#define PKT_SIZE_POS 32
+#define PKT_SIZE_LEN 12
+#define NEXT_DESC_ADDRL_POS 0
+#define NEXT_DESC_ADDRL_LEN 32
+#define NEXT_DESC_ADDRH_POS 48
+#define NEXT_DESC_ADDRH_LEN 10
+
+#define TXPKTCOUNT_POS 16
+#define TXPKTCOUNT_LEN 8
+#define RXPKTCOUNT_POS 16
+#define RXPKTCOUNT_LEN 8
+
+#define TX_PKT_SENT BIT(0)
+#define TX_BUS_ERROR BIT(3)
+#define RX_PKT_RCVD BIT(4)
+#define RX_BUS_ERROR BIT(7)
+#define RXSTATUS_RXPKTRCVD BIT(0)
+
+struct xge_raw_desc {
+ __le64 m0;
+ __le64 m1;
+ __le64 m2;
+ __le64 m3;
+ __le64 m4;
+ __le64 m5;
+ __le64 m6;
+ __le64 m7;
+};
+
+struct pkt_info {
+ struct sk_buff *skb;
+ dma_addr_t dma_addr;
+ void *pkt_buf;
+};
+
+/* software context of a descriptor ring */
+struct xge_desc_ring {
+ struct net_device *ndev;
+ dma_addr_t dma_addr;
+ u8 head;
+ u8 tail;
+ union {
+ void *desc_addr;
+ struct xge_raw_desc *raw_desc;
+ };
+ struct pkt_info (*pkt_info);
+};
+
+static inline u64 xge_set_desc_bits(int pos, int len, u64 val)
+{
+ return (val & ((1ULL << len) - 1)) << pos;
+}
+
+static inline u64 xge_get_desc_bits(int pos, int len, u64 src)
+{
+ return (src >> pos) & ((1ULL << len) - 1);
+}
+
+#define SET_BITS(field, val) \
+ xge_set_desc_bits(field ## _POS, field ## _LEN, val)
+
+#define GET_BITS(field, src) \
+ xge_get_desc_bits(field ## _POS, field ## _LEN, src)
+
+void xge_setup_desc(struct xge_desc_ring *ring);
+void xge_update_tx_desc_addr(struct xge_pdata *pdata);
+void xge_update_rx_desc_addr(struct xge_pdata *pdata);
+void xge_intr_enable(struct xge_pdata *pdata);
+void xge_intr_disable(struct xge_pdata *pdata);
+
+#endif /* __XGENE_ENET_V2_RING_H__ */