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Message-ID: <20210115135339.3127198-4-steen.hegelund@microchip.com>
Date: Fri, 15 Jan 2021 14:53:34 +0100
From: Steen Hegelund <steen.hegelund@...rochip.com>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
CC: Steen Hegelund <steen.hegelund@...rochip.com>,
Andrew Lunn <andrew@...n.ch>,
Russell King <linux@...linux.org.uk>,
Lars Povlsen <lars.povlsen@...rochip.com>,
Bjarni Jonasson <bjarni.jonasson@...rochip.com>,
Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Madalin Bucur <madalin.bucur@....nxp.com>,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Mark Einon <mark.einon@...il.com>,
Masahiro Yamada <masahiroy@...nel.org>,
Arnd Bergmann <arnd@...db.de>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>
Subject: [RFC PATCH v3 3/8] net: sparx5: add hostmode with phylink support
This adds phylink support for ports and register base injection
and extraction.
Signed-off-by: Steen Hegelund <steen.hegelund@...rochip.com>
Signed-off-by: Bjarni Jonasson <bjarni.jonasson@...rochip.com>
Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>
---
.../net/ethernet/microchip/sparx5/Makefile | 2 +-
.../ethernet/microchip/sparx5/sparx5_main.c | 83 ++++--
.../ethernet/microchip/sparx5/sparx5_main.h | 16 +
.../ethernet/microchip/sparx5/sparx5_netdev.c | 204 +++++++++++++
.../ethernet/microchip/sparx5/sparx5_packet.c | 277 ++++++++++++++++++
.../microchip/sparx5/sparx5_phylink.c | 170 +++++++++++
6 files changed, 723 insertions(+), 29 deletions(-)
create mode 100644 drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c
create mode 100644 drivers/net/ethernet/microchip/sparx5/sparx5_packet.c
create mode 100644 drivers/net/ethernet/microchip/sparx5/sparx5_phylink.c
diff --git a/drivers/net/ethernet/microchip/sparx5/Makefile b/drivers/net/ethernet/microchip/sparx5/Makefile
index 41a31843d86f..19a593d17f4a 100644
--- a/drivers/net/ethernet/microchip/sparx5/Makefile
+++ b/drivers/net/ethernet/microchip/sparx5/Makefile
@@ -5,4 +5,4 @@
obj-$(CONFIG_SPARX5_SWITCH) += sparx5-switch.o
-sparx5-switch-objs := sparx5_main.o
+sparx5-switch-objs := sparx5_main.o sparx5_packet.o sparx5_netdev.o sparx5_phylink.o
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
index 5d07e72ef8a7..6919e673ceb8 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
@@ -247,9 +247,15 @@ static int sparx5_create_port(struct sparx5 *sparx5,
struct initial_port_config *config)
{
struct sparx5_port *spx5_port;
+ struct net_device *ndev;
- /* netdev creation to be added in later patches */
- spx5_port = devm_kzalloc(sparx5->dev, sizeof(*spx5_port), GFP_KERNEL);
+ ndev = sparx5_create_netdev(sparx5, config->portno);
+ if (IS_ERR(ndev)) {
+ dev_err(sparx5->dev, "Could not create net device: %02u\n",
+ config->portno);
+ return PTR_ERR(ndev);
+ }
+ spx5_port = netdev_priv(ndev);
spx5_port->of_node = config->node;
spx5_port->serdes = config->serdes;
spx5_port->pvid = NULL_VID;
@@ -259,8 +265,13 @@ static int sparx5_create_port(struct sparx5 *sparx5,
spx5_port->max_vlan_tags = SPX5_PORT_MAX_TAGS_NONE;
spx5_port->vlan_type = SPX5_VLAN_PORT_TYPE_UNAWARE;
spx5_port->custom_etype = 0x8880; /* Vitesse */
+ sparx5->ports[config->portno] = spx5_port;
+
+ spx5_port->conf = config->conf;
+
+ /* VLAN setup to be added in later patches */
- /* PHYLINK support to be added in later patches */
+ /* PHYLINK setup to be added in later patches */
return 0;
}
@@ -332,7 +343,9 @@ static int sparx5_init_switchcore(struct sparx5 *sparx5)
spx5_wr(ANA_AC_STAT_RESET_RESET_SET(1), sparx5, ANA_AC_STAT_RESET);
spx5_wr(ASM_STAT_CFG_STAT_CNT_CLR_SHOT_SET(1), sparx5, ASM_STAT_CFG);
- /* Injection/Extraction to be added in later patches */
+ /* Configure manual injection */
+ sparx5_manual_injection_mode(sparx5);
+
/* Enable switch-core and queue system */
spx5_wr(HSCH_RESET_CFG_CORE_ENA_SET(1), sparx5, HSCH_RESET_CFG);
@@ -524,27 +537,7 @@ static void sparx5_board_init(struct sparx5 *sparx5)
static int sparx5_start(struct sparx5 *sparx5)
{
u32 idx;
-
- if (sparx5_create_targets(sparx5))
- return -ENODEV;
-
- /* Read chip ID to check CPU interface */
- sparx5->chip_id = spx5_rd(sparx5, GCB_CHIP_ID);
-
- sparx5->target_ct = (enum spx5_target_chiptype)
- GCB_CHIP_ID_PART_ID_GET(sparx5->chip_id);
-
- /* Initialize Switchcore and internal RAMs */
- if (sparx5_init_switchcore(sparx5)) {
- dev_err(sparx5->dev, "Switchcore initialization error\n");
- return -EINVAL;
- }
-
- /* Initialize the LC-PLL (core clock) and set affected registers */
- if (sparx5_init_coreclock(sparx5)) {
- dev_err(sparx5->dev, "LC-PLL initialization error\n");
- return -EINVAL;
- }
+ int err;
/* Setup own UPSIDs */
for (idx = 0; idx < 3; idx++) {
@@ -579,13 +572,26 @@ static int sparx5_start(struct sparx5 *sparx5)
/* Enable queue limitation watermarks */
sparx5_qlim_set(sparx5);
- /* netdev and resource calendar support to be added in later patches */
+ /* Resource calendar support to be added in later patches */
+
+ err = sparx5_register_netdevs(sparx5);
+ if (err)
+ return err;
sparx5_board_init(sparx5);
return 0;
}
+static void sparx5_cleanup_ports(struct sparx5 *sparx5)
+{
+ int idx;
+
+ for (idx = 0; idx < SPX5_PORTS; ++idx) {
+ /* Port clean to be added in later patches */
+ }
+}
+
static int mchp_sparx5_probe(struct platform_device *pdev)
{
struct initial_port_config *configs, *config;
@@ -594,6 +600,7 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
struct sparx5 *sparx5;
int idx = 0, err = 0;
const u8 *mac_addr;
+ int irq;
if (!np && !pdev->dev.platform_data)
return -ENODEV;
@@ -696,7 +703,18 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
ether_addr_copy(sparx5->base_mac, mac_addr);
}
- /* Inj/Xtr IRQ support to be added in later patches */
+ /* Hook xtr irq */
+ irq = platform_get_irq(sparx5->pdev, 0);
+ if (irq < 0) {
+ err = irq;
+ goto cleanup_config;
+ }
+ err = devm_request_irq(sparx5->dev, irq,
+ sparx5_xtr_handler, IRQF_SHARED,
+ "sparx5-xtr", sparx5);
+ if (err)
+ goto cleanup_config;
+
/* Read chip ID to check CPU interface */
sparx5->chip_id = spx5_rd(sparx5, GCB_CHIP_ID);
@@ -736,12 +754,20 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
return err;
cleanup_ports:
- /* Port cleanup to be added in later patches */
+ sparx5_cleanup_ports(sparx5);
cleanup_config:
kfree(configs);
return err;
}
+static int mchp_sparx5_remove(struct platform_device *pdev)
+{
+ struct sparx5 *sparx5 = platform_get_drvdata(pdev);
+
+ sparx5_cleanup_ports(sparx5);
+ return 0;
+}
+
static const struct of_device_id mchp_sparx5_match[] = {
{ .compatible = "microchip,sparx5-switch" },
{ }
@@ -750,6 +776,7 @@ MODULE_DEVICE_TABLE(of, mchp_sparx5_match);
static struct platform_driver mchp_sparx5_driver = {
.probe = mchp_sparx5_probe,
+ .remove = mchp_sparx5_remove,
.driver = {
.name = "sparx5-switch",
.of_match_table = mchp_sparx5_match,
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.h b/drivers/net/ethernet/microchip/sparx5/sparx5_main.h
index 6b80e09bcc13..2627af7e023b 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.h
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.h
@@ -92,6 +92,9 @@ struct sparx5_port {
struct device_node *of_node;
struct phy *serdes;
struct sparx5_port_config conf;
+ struct phylink_config phylink_config;
+ struct phylink *phylink;
+ struct phylink_pcs phylink_pcs;
u16 portno;
/* Ingress default VLAN (pvid) */
u16 pvid;
@@ -132,6 +135,17 @@ struct sparx5 {
bool sd_sgpio_remapping;
};
+/* sparx5_packet.c */
+irqreturn_t sparx5_xtr_handler(int irq, void *_priv);
+int sparx5_port_xmit_impl(struct sk_buff *skb, struct net_device *dev);
+void sparx5_manual_injection_mode(struct sparx5 *sparx5);
+
+/* sparx5_netdev.c */
+bool sparx5_netdevice_check(const struct net_device *dev);
+struct net_device *sparx5_create_netdev(struct sparx5 *sparx5, u32 portno);
+int sparx5_register_netdevs(struct sparx5 *sparx5);
+void sparx5_destroy_netdev(struct sparx5 *sparx5, struct sparx5_port *port);
+
/* Clock period in picoseconds */
static inline u32 sparx5_clk_period(enum sparx5_core_clockfreq cclock)
{
@@ -146,6 +160,8 @@ static inline u32 sparx5_clk_period(enum sparx5_core_clockfreq cclock)
}
}
+extern const struct phylink_mac_ops sparx5_phylink_mac_ops;
+
/* Calculate raw offset */
static inline __pure int spx5_offset(int id, int tinst, int tcnt,
int gbase, int ginst,
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c b/drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c
new file mode 100644
index 000000000000..0c3dfffedda4
--- /dev/null
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Microchip Sparx5 Switch driver
+ *
+ * Copyright (c) 2020 Microchip Technology Inc. and its subsidiaries.
+ */
+
+#include "sparx5_main_regs.h"
+#include "sparx5_main.h"
+
+/* The IFH bit position of the first VSTAX bit. This is because the
+ * VSTAX bit positions in Data sheet is starting from zero.
+ */
+#define VSTAX 73
+
+static void ifh_encode_bitfield(void *ifh, u64 value, u32 pos, u32 width)
+{
+ u8 *ifh_hdr = ifh;
+ /* Calculate the Start IFH byte position of this IFH bit position */
+ u32 byte = (35 - (pos / 8));
+ /* Calculate the Start bit position in the Start IFH byte */
+ u32 bit = (pos % 8);
+ u64 encode = GENMASK(bit + width - 1, bit) & (value << bit);
+
+ /* Max width is 5 bytes - 40 bits. In worst case this will
+ * spread over 6 bytes - 48 bits
+ */
+ compiletime_assert(width <= 40, "Unsupported width, must be <= 40");
+
+ /* The b0-b7 goes into the start IFH byte */
+ if (encode & 0xFF)
+ ifh_hdr[byte] |= (u8)((encode & 0xFF));
+ /* The b8-b15 goes into the next IFH byte */
+ if (encode & 0xFF00)
+ ifh_hdr[byte - 1] |= (u8)((encode & 0xFF00) >> 8);
+ /* The b16-b23 goes into the next IFH byte */
+ if (encode & 0xFF0000)
+ ifh_hdr[byte - 2] |= (u8)((encode & 0xFF0000) >> 16);
+ /* The b24-b31 goes into the next IFH byte */
+ if (encode & 0xFF000000)
+ ifh_hdr[byte - 3] |= (u8)((encode & 0xFF000000) >> 24);
+ /* The b32-b39 goes into the next IFH byte */
+ if (encode & 0xFF00000000)
+ ifh_hdr[byte - 4] |= (u8)((encode & 0xFF00000000) >> 32);
+ /* The b40-b47 goes into the next IFH byte */
+ if (encode & 0xFF0000000000)
+ ifh_hdr[byte - 5] |= (u8)((encode & 0xFF0000000000) >> 40);
+}
+
+static void sparx5_set_port_ifh(void *ifh_hdr, u16 portno)
+{
+ /* VSTAX.RSV = 1. MSBit must be 1 */
+ ifh_encode_bitfield(ifh_hdr, 1, VSTAX + 79, 1);
+ /* VSTAX.INGR_DROP_MODE = Enable. Don't make head-of-line blocking */
+ ifh_encode_bitfield(ifh_hdr, 1, VSTAX + 55, 1);
+ /* MISC.CPU_MASK/DPORT = Destination port */
+ ifh_encode_bitfield(ifh_hdr, portno, 29, 8);
+ /* MISC.PIPELINE_PT */
+ ifh_encode_bitfield(ifh_hdr, 16, 37, 5);
+ /* MISC.PIPELINE_ACT */
+ ifh_encode_bitfield(ifh_hdr, 1, 42, 3);
+ /* FWD.SRC_PORT = CPU */
+ ifh_encode_bitfield(ifh_hdr, SPX5_PORT_CPU, 46, 7);
+ /* FWD.SFLOW_ID (disable SFlow sampling) */
+ ifh_encode_bitfield(ifh_hdr, 124, 57, 7);
+ /* FWD.UPDATE_FCS = Enable. Enforce update of FCS. */
+ ifh_encode_bitfield(ifh_hdr, 1, 67, 1);
+}
+
+static int sparx5_port_open(struct net_device *ndev)
+{
+ struct sparx5_port *port = netdev_priv(ndev);
+ int err = 0;
+
+ err = phylink_of_phy_connect(port->phylink, port->of_node, 0);
+ if (err) {
+ netdev_err(ndev, "Could not attach to PHY\n");
+ return err;
+ }
+
+ phylink_start(port->phylink);
+
+ if (!ndev->phydev) {
+ /* power up serdes */
+ port->conf.power_down = false;
+ err = phy_power_on(port->serdes);
+ if (err)
+ netdev_err(ndev, "%s failed\n", __func__);
+ }
+
+ return err;
+}
+
+static int sparx5_port_stop(struct net_device *ndev)
+{
+ struct sparx5_port *port = netdev_priv(ndev);
+ int err = 0;
+
+ phylink_stop(port->phylink);
+ phylink_disconnect_phy(port->phylink);
+
+ if (!ndev->phydev) {
+ port->conf.power_down = true;
+ err = phy_power_off(port->serdes);
+ if (err)
+ netdev_err(ndev, "%s failed\n", __func__);
+ }
+ return 0;
+}
+
+static int sparx5_port_get_phys_port_name(struct net_device *dev,
+ char *buf, size_t len)
+{
+ struct sparx5_port *port = netdev_priv(dev);
+ int ret;
+
+ ret = snprintf(buf, len, "p%d", port->portno);
+ if (ret >= len)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int sparx5_set_mac_address(struct net_device *dev, void *p)
+{
+ const struct sockaddr *addr = p;
+
+ /* Record the address */
+ ether_addr_copy(dev->dev_addr, addr->sa_data);
+
+ return 0;
+}
+
+static const struct net_device_ops sparx5_port_netdev_ops = {
+ .ndo_open = sparx5_port_open,
+ .ndo_stop = sparx5_port_stop,
+ .ndo_start_xmit = sparx5_port_xmit_impl,
+ .ndo_get_phys_port_name = sparx5_port_get_phys_port_name,
+ .ndo_set_mac_address = sparx5_set_mac_address,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+bool sparx5_netdevice_check(const struct net_device *dev)
+{
+ return dev && (dev->netdev_ops == &sparx5_port_netdev_ops);
+}
+
+struct net_device *sparx5_create_netdev(struct sparx5 *sparx5, u32 portno)
+{
+ struct net_device *ndev;
+ struct sparx5_port *spx5_port;
+ u64 val;
+
+ ndev = devm_alloc_etherdev(sparx5->dev, sizeof(struct sparx5_port));
+ if (!ndev)
+ return ERR_PTR(-ENOMEM);
+
+ SET_NETDEV_DEV(ndev, sparx5->dev);
+ spx5_port = netdev_priv(ndev);
+ spx5_port->ndev = ndev;
+ spx5_port->sparx5 = sparx5;
+ spx5_port->portno = portno;
+ sparx5_set_port_ifh(spx5_port->ifh, portno);
+ snprintf(ndev->name, IFNAMSIZ, "eth%d", portno);
+
+ ndev->netdev_ops = &sparx5_port_netdev_ops;
+ ndev->features |= NETIF_F_LLTX; /* software tx */
+
+ val = ether_addr_to_u64(sparx5->base_mac) + portno + 1;
+ u64_to_ether_addr(val, ndev->dev_addr);
+
+ return ndev;
+}
+
+int sparx5_register_netdevs(struct sparx5 *sparx5)
+{
+ int portno;
+ int err;
+
+ for (portno = 0; portno < SPX5_PORTS; portno++)
+ if (sparx5->ports[portno]) {
+ err = devm_register_netdev(sparx5->dev,
+ sparx5->ports[portno]->ndev);
+ if (err) {
+ dev_err(sparx5->dev,
+ "port: %02u: netdev registration failed\n",
+ portno);
+ return err;
+ }
+ }
+ return 0;
+}
+
+void sparx5_destroy_netdev(struct sparx5 *sparx5, struct sparx5_port *port)
+{
+ if (port->phylink) {
+ /* Disconnect the phy */
+ rtnl_lock();
+ sparx5_port_stop(port->ndev);
+ phylink_disconnect_phy(port->phylink);
+ rtnl_unlock();
+ phylink_destroy(port->phylink);
+ port->phylink = NULL;
+ }
+}
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_packet.c b/drivers/net/ethernet/microchip/sparx5/sparx5_packet.c
new file mode 100644
index 000000000000..22177134e1cc
--- /dev/null
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_packet.c
@@ -0,0 +1,277 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Microchip Sparx5 Switch driver
+ *
+ * Copyright (c) 2020 Microchip Technology Inc. and its subsidiaries.
+ */
+
+#include "sparx5_main_regs.h"
+#include "sparx5_main.h"
+
+#define XTR_EOF_0 ntohl((__force __be32)0x80000000u)
+#define XTR_EOF_1 ntohl((__force __be32)0x80000001u)
+#define XTR_EOF_2 ntohl((__force __be32)0x80000002u)
+#define XTR_EOF_3 ntohl((__force __be32)0x80000003u)
+#define XTR_PRUNED ntohl((__force __be32)0x80000004u)
+#define XTR_ABORT ntohl((__force __be32)0x80000005u)
+#define XTR_ESCAPE ntohl((__force __be32)0x80000006u)
+#define XTR_NOT_READY ntohl((__force __be32)0x80000007u)
+
+#define XTR_VALID_BYTES(x) (4 - ((x) & 3))
+
+#define XTR_QUEUE 0
+#define INJ_QUEUE 0
+
+struct frame_info {
+ int src_port;
+};
+
+static void sparx5_xtr_flush(struct sparx5 *sparx5, u8 grp)
+{
+ /* Start flush */
+ spx5_wr(QS_XTR_FLUSH_FLUSH_SET(BIT(grp)), sparx5, QS_XTR_FLUSH);
+
+ /* Allow to drain */
+ mdelay(1);
+
+ /* All Queues normal */
+ spx5_wr(0, sparx5, QS_XTR_FLUSH);
+}
+
+static void sparx5_ifh_parse(u32 *ifh, struct frame_info *info)
+{
+ u8 *xtr_hdr = (u8 *)ifh;
+
+ /* FWD is bit 45-72 (28 bits), but we only read the 27 LSB for now */
+ u32 fwd =
+ ((u32)xtr_hdr[27] << 24) |
+ ((u32)xtr_hdr[28] << 16) |
+ ((u32)xtr_hdr[29] << 8) |
+ ((u32)xtr_hdr[30] << 0);
+ fwd = (fwd >> 5);
+ info->src_port = FIELD_GET(GENMASK(7, 1), fwd);
+}
+
+static void sparx5_xtr_grp(struct sparx5 *sparx5, u8 grp, bool byte_swap)
+{
+ int i, byte_cnt = 0;
+ bool eof_flag = false, pruned_flag = false, abort_flag = false;
+ u32 ifh[IFH_LEN];
+ struct sk_buff *skb;
+ struct frame_info fi;
+ struct sparx5_port *port;
+ struct net_device *netdev;
+ u32 *rxbuf;
+
+ /* Get IFH */
+ for (i = 0; i < IFH_LEN; i++)
+ ifh[i] = spx5_rd(sparx5, QS_XTR_RD(grp));
+
+ /* Decode IFH (whats needed) */
+ sparx5_ifh_parse(ifh, &fi);
+
+ /* Map to port netdev */
+ port = fi.src_port < SPX5_PORTS ?
+ sparx5->ports[fi.src_port] : NULL;
+ if (!port || !port->ndev) {
+ dev_err(sparx5->dev, "Data on inactive port %d\n", fi.src_port);
+ sparx5_xtr_flush(sparx5, grp);
+ return;
+ }
+
+ /* Have netdev, get skb */
+ netdev = port->ndev;
+ skb = netdev_alloc_skb(netdev, netdev->mtu + ETH_HLEN);
+ if (!skb) {
+ sparx5_xtr_flush(sparx5, grp);
+ dev_err(sparx5->dev, "No skb allocated\n");
+ return;
+ }
+ rxbuf = (u32 *)skb->data;
+
+ /* Now, pull frame data */
+ while (!eof_flag) {
+ u32 val = spx5_rd(sparx5, QS_XTR_RD(grp));
+ u32 cmp = val;
+
+ if (byte_swap)
+ cmp = ntohl((__force __be32)val);
+
+ switch (cmp) {
+ case XTR_NOT_READY:
+ break;
+ case XTR_ABORT:
+ /* No accompanying data */
+ abort_flag = true;
+ eof_flag = true;
+ break;
+ case XTR_EOF_0:
+ case XTR_EOF_1:
+ case XTR_EOF_2:
+ case XTR_EOF_3:
+ /* This assumes STATUS_WORD_POS == 1, Status
+ * just after last data
+ */
+ byte_cnt -= (4 - XTR_VALID_BYTES(val));
+ eof_flag = true;
+ break;
+ case XTR_PRUNED:
+ /* But get the last 4 bytes as well */
+ eof_flag = true;
+ pruned_flag = true;
+ fallthrough;
+ case XTR_ESCAPE:
+ *rxbuf = spx5_rd(sparx5, QS_XTR_RD(grp));
+ byte_cnt += 4;
+ rxbuf++;
+ break;
+ default:
+ *rxbuf = val;
+ byte_cnt += 4;
+ rxbuf++;
+ }
+ }
+
+ if (abort_flag || pruned_flag || !eof_flag) {
+ netdev_err(netdev, "Discarded frame: abort:%d pruned:%d eof:%d\n",
+ abort_flag, pruned_flag, eof_flag);
+ kfree_skb(skb);
+ return;
+ }
+
+#if defined(CONFIG_DEBUG_KERNEL) /* TODO: Remove before upstreaming */
+ if (!netif_oper_up(netdev)) {
+ netdev_err(netdev, "Discarded frame: Interface not up\n");
+ kfree_skb(skb);
+ return;
+ }
+#endif
+
+ /* Finish up skb */
+ skb_put(skb, byte_cnt - ETH_FCS_LEN);
+ eth_skb_pad(skb);
+ skb->protocol = eth_type_trans(skb, netdev);
+ netif_rx(skb);
+ netdev->stats.rx_bytes += skb->len;
+ netdev->stats.rx_packets++;
+}
+
+static int sparx5_inject(struct sparx5 *sparx5,
+ u32 *ifh,
+ struct sk_buff *skb)
+{
+ u32 val, w, count;
+ int grp = INJ_QUEUE;
+ u8 *buf;
+
+ val = spx5_rd(sparx5, QS_INJ_STATUS);
+ if (!(QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp))) {
+ pr_err("Injection: Queue not ready: 0x%lx\n",
+ QS_INJ_STATUS_FIFO_RDY_GET(val));
+ return -EBUSY;
+ }
+
+ if (QS_INJ_STATUS_WMARK_REACHED_GET(val) & BIT(grp)) {
+ pr_err("Injection: Watermark reached: 0x%lx\n",
+ QS_INJ_STATUS_WMARK_REACHED_GET(val));
+ return -EBUSY;
+ }
+
+ /* Indicate SOF */
+ spx5_wr(QS_INJ_CTRL_SOF_SET(1) |
+ QS_INJ_CTRL_GAP_SIZE_SET(1),
+ sparx5, QS_INJ_CTRL(grp));
+
+ // Write the IFH to the chip.
+ for (w = 0; w < IFH_LEN; w++)
+ spx5_wr(ifh[w], sparx5, QS_INJ_WR(grp));
+
+ /* Write words, round up */
+ count = ((skb->len + 3) / 4);
+ buf = skb->data;
+ for (w = 0; w < count; w++, buf += 4) {
+ val = get_unaligned((const u32 *)buf);
+ spx5_wr(val, sparx5, QS_INJ_WR(grp));
+ }
+
+ /* Add padding */
+ while (w < (60 / 4)) {
+ spx5_wr(0, sparx5, QS_INJ_WR(grp));
+ w++;
+ }
+
+ /* Indicate EOF and valid bytes in last word */
+ spx5_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) |
+ QS_INJ_CTRL_VLD_BYTES_SET(skb->len < 60 ? 0 : skb->len % 4) |
+ QS_INJ_CTRL_EOF_SET(1),
+ sparx5, QS_INJ_CTRL(grp));
+
+ /* Add dummy CRC */
+ spx5_wr(0, sparx5, QS_INJ_WR(grp));
+ w++;
+
+ return NETDEV_TX_OK;
+}
+
+int sparx5_port_xmit_impl(struct sk_buff *skb, struct net_device *dev)
+{
+ struct sparx5_port *port = netdev_priv(dev);
+ struct sparx5 *sparx5 = port->sparx5;
+ struct net_device_stats *stats = &dev->stats;
+ int ret;
+
+ ret = sparx5_inject(sparx5, port->ifh, skb);
+
+ if (ret == NETDEV_TX_OK) {
+ stats->tx_bytes += skb->len;
+ stats->tx_packets++;
+ } else {
+ stats->tx_dropped++;
+ }
+
+ dev_kfree_skb_any(skb);
+
+ return ret;
+}
+
+void sparx5_manual_injection_mode(struct sparx5 *sparx5)
+{
+ const int byte_swap = 1;
+ int portno;
+
+ /* Change mode to manual extraction and injection */
+ spx5_wr(QS_XTR_GRP_CFG_MODE_SET(1) |
+ QS_XTR_GRP_CFG_STATUS_WORD_POS_SET(1) |
+ QS_XTR_GRP_CFG_BYTE_SWAP_SET(byte_swap),
+ sparx5, QS_XTR_GRP_CFG(XTR_QUEUE));
+ spx5_wr(QS_INJ_GRP_CFG_MODE_SET(1) |
+ QS_INJ_GRP_CFG_BYTE_SWAP_SET(byte_swap),
+ sparx5, QS_INJ_GRP_CFG(INJ_QUEUE));
+
+ /* CPU ports capture setup */
+ for (portno = SPX5_PORT_CPU_0; portno <= SPX5_PORT_CPU_1; portno++) {
+ /* ASM CPU port: No preamble, IFH, enable padding */
+ spx5_wr(ASM_PORT_CFG_PAD_ENA_SET(1) |
+ ASM_PORT_CFG_NO_PREAMBLE_ENA_SET(1) |
+ ASM_PORT_CFG_INJ_FORMAT_CFG_SET(1), /* 1 = IFH */
+ sparx5, ASM_PORT_CFG(portno));
+ }
+
+ /* Reset WM cnt to unclog queued frames */
+ for (portno = SPX5_PORT_CPU_0; portno <= SPX5_PORT_CPU_1; portno++)
+ spx5_rmw(DSM_DEV_TX_STOP_WM_CFG_DEV_TX_CNT_CLR_SET(1),
+ DSM_DEV_TX_STOP_WM_CFG_DEV_TX_CNT_CLR,
+ sparx5,
+ DSM_DEV_TX_STOP_WM_CFG(portno));
+}
+
+irqreturn_t sparx5_xtr_handler(int irq, void *_sparx5)
+{
+ struct sparx5 *s5 = _sparx5;
+ int poll = 64;
+
+ /* Check data in queue */
+ while (spx5_rd(s5, QS_XTR_DATA_PRESENT) & BIT(XTR_QUEUE) && poll-- > 0)
+ sparx5_xtr_grp(s5, XTR_QUEUE, false);
+
+ return IRQ_HANDLED;
+}
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_phylink.c b/drivers/net/ethernet/microchip/sparx5/sparx5_phylink.c
new file mode 100644
index 000000000000..6d695994a7b0
--- /dev/null
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_phylink.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Microchip Sparx5 Switch driver
+ *
+ * Copyright (c) 2020 Microchip Technology Inc. and its subsidiaries.
+ */
+
+#include <linux/module.h>
+#include <linux/phylink.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/sfp.h>
+
+#include "sparx5_main_regs.h"
+#include "sparx5_main.h"
+
+static void sparx5_phylink_validate(struct phylink_config *config,
+ unsigned long *supported,
+ struct phylink_link_state *state)
+{
+ struct sparx5_port *port = netdev_priv(to_net_dev(config->dev));
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+
+ phylink_set(mask, Autoneg);
+ phylink_set_port_modes(mask);
+ phylink_set(mask, Pause);
+ phylink_set(mask, Asym_Pause);
+
+ switch (state->interface) {
+ case PHY_INTERFACE_MODE_10GBASER:
+ case PHY_INTERFACE_MODE_NA:
+ if (port->conf.bandwidth == SPEED_25000 ||
+ port->conf.bandwidth == SPEED_10000) {
+ phylink_set(mask, 5000baseT_Full);
+ phylink_set(mask, 10000baseT_Full);
+ phylink_set(mask, 10000baseCR_Full);
+ phylink_set(mask, 10000baseSR_Full);
+ phylink_set(mask, 10000baseLR_Full);
+ phylink_set(mask, 10000baseLRM_Full);
+ phylink_set(mask, 10000baseER_Full);
+ }
+ if (port->conf.bandwidth == SPEED_25000) {
+ phylink_set(mask, 25000baseCR_Full);
+ phylink_set(mask, 25000baseSR_Full);
+ }
+ if (state->interface != PHY_INTERFACE_MODE_NA)
+ break;
+ fallthrough;
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_QSGMII:
+ phylink_set(mask, 10baseT_Half);
+ phylink_set(mask, 10baseT_Full);
+ phylink_set(mask, 100baseT_Half);
+ phylink_set(mask, 100baseT_Full);
+ phylink_set(mask, 1000baseT_Full);
+ phylink_set(mask, 1000baseX_Full);
+ if (state->interface != PHY_INTERFACE_MODE_NA)
+ break;
+ fallthrough;
+ case PHY_INTERFACE_MODE_1000BASEX:
+ case PHY_INTERFACE_MODE_2500BASEX:
+ if (state->interface != PHY_INTERFACE_MODE_2500BASEX) {
+ phylink_set(mask, 1000baseT_Full);
+ phylink_set(mask, 1000baseX_Full);
+ }
+ if (state->interface == PHY_INTERFACE_MODE_2500BASEX ||
+ state->interface == PHY_INTERFACE_MODE_NA) {
+ phylink_set(mask, 2500baseT_Full);
+ phylink_set(mask, 2500baseX_Full);
+ }
+ break;
+ default:
+ bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
+ return;
+ }
+ bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS);
+ bitmap_and(state->advertising, state->advertising, mask,
+ __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+static bool port_conf_has_changed(struct sparx5_port_config *a, struct sparx5_port_config *b)
+{
+ if (a->speed != b->speed ||
+ a->portmode != b->portmode ||
+ a->autoneg != b->autoneg ||
+ a->pause != b->pause ||
+ a->media_type != b->media_type)
+ return true;
+ return false;
+}
+
+static void sparx5_phylink_mac_config(struct phylink_config *config,
+ unsigned int mode,
+ const struct phylink_link_state *state)
+{
+ struct sparx5_port *port = netdev_priv(to_net_dev(config->dev));
+ struct sparx5_port_config conf;
+
+ conf = port->conf;
+ conf.power_down = false;
+ conf.portmode = state->interface;
+ conf.speed = state->speed;
+ conf.autoneg = state->an_enabled;
+ conf.pause = state->pause;
+
+ if (state->interface == PHY_INTERFACE_MODE_10GBASER) {
+ if (state->speed == SPEED_UNKNOWN) {
+ /* When a SFP is plugged in we use capabilities to
+ * default to the highest supported speed
+ */
+ if (phylink_test(state->advertising, 25000baseSR_Full) ||
+ phylink_test(state->advertising, 25000baseCR_Full))
+ conf.speed = SPEED_25000;
+ else if (state->interface == PHY_INTERFACE_MODE_10GBASER)
+ conf.speed = SPEED_10000;
+ } else if (state->speed == SPEED_2500) {
+ conf.portmode = PHY_INTERFACE_MODE_2500BASEX;
+ } else if (state->speed == SPEED_1000) {
+ conf.portmode = PHY_INTERFACE_MODE_1000BASEX;
+ }
+
+ if (phylink_test(state->advertising, FIBRE))
+ conf.media_type = ETH_MEDIA_SR;
+ else
+ conf.media_type = ETH_MEDIA_DAC;
+ }
+
+ if (!port_conf_has_changed(&port->conf, &conf))
+ return;
+}
+
+static void sparx5_phylink_mac_link_up(struct phylink_config *config,
+ struct phy_device *phy,
+ unsigned int mode,
+ phy_interface_t interface,
+ int speed, int duplex,
+ bool tx_pause, bool rx_pause)
+{
+ /* Currently not used */
+}
+
+static void sparx5_phylink_mac_link_state(struct phylink_config *config,
+ struct phylink_link_state *state)
+{
+ state->link = true;
+ state->an_complete = true;
+ state->speed = SPEED_1000;
+ state->duplex = true;
+ state->pause = MLO_PAUSE_AN;
+}
+
+static void sparx5_phylink_mac_aneg_restart(struct phylink_config *config)
+{
+ /* Currently not used */
+}
+
+static void sparx5_phylink_mac_link_down(struct phylink_config *config,
+ unsigned int mode,
+ phy_interface_t interface)
+{
+ /* Currently not used */
+}
+
+const struct phylink_mac_ops sparx5_phylink_mac_ops = {
+ .validate = sparx5_phylink_validate,
+ .mac_pcs_get_state = sparx5_phylink_mac_link_state,
+ .mac_config = sparx5_phylink_mac_config,
+ .mac_an_restart = sparx5_phylink_mac_aneg_restart,
+ .mac_link_down = sparx5_phylink_mac_link_down,
+ .mac_link_up = sparx5_phylink_mac_link_up,
+};
--
2.29.2
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