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linuxdebug/drivers/net/ethernet/microchip/sparx5/sparx5_port.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0+
/* Microchip Sparx5 Switch driver
*
* Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
*/
#include <linux/module.h>
#include <linux/phy/phy.h>
#include "sparx5_main_regs.h"
#include "sparx5_main.h"
#include "sparx5_port.h"
#define SPX5_ETYPE_TAG_C 0x8100
#define SPX5_ETYPE_TAG_S 0x88a8
#define SPX5_WAIT_US 1000
#define SPX5_WAIT_MAX_US 2000
enum port_error {
SPX5_PERR_SPEED,
SPX5_PERR_IFTYPE,
};
#define PAUSE_DISCARD 0xC
#define ETH_MAXLEN (ETH_DATA_LEN + ETH_HLEN + ETH_FCS_LEN)
static void decode_sgmii_word(u16 lp_abil, struct sparx5_port_status *status)
{
status->an_complete = true;
if (!(lp_abil & LPA_SGMII_LINK)) {
status->link = false;
return;
}
switch (lp_abil & LPA_SGMII_SPD_MASK) {
case LPA_SGMII_10:
status->speed = SPEED_10;
break;
case LPA_SGMII_100:
status->speed = SPEED_100;
break;
case LPA_SGMII_1000:
status->speed = SPEED_1000;
break;
default:
status->link = false;
return;
}
if (lp_abil & LPA_SGMII_FULL_DUPLEX)
status->duplex = DUPLEX_FULL;
else
status->duplex = DUPLEX_HALF;
}
static void decode_cl37_word(u16 lp_abil, uint16_t ld_abil, struct sparx5_port_status *status)
{
status->link = !(lp_abil & ADVERTISE_RFAULT) && status->link;
status->an_complete = true;
status->duplex = (ADVERTISE_1000XFULL & lp_abil) ?
DUPLEX_FULL : DUPLEX_UNKNOWN; // 1G HDX not supported
if ((ld_abil & ADVERTISE_1000XPAUSE) &&
(lp_abil & ADVERTISE_1000XPAUSE)) {
status->pause = MLO_PAUSE_RX | MLO_PAUSE_TX;
} else if ((ld_abil & ADVERTISE_1000XPSE_ASYM) &&
(lp_abil & ADVERTISE_1000XPSE_ASYM)) {
status->pause |= (lp_abil & ADVERTISE_1000XPAUSE) ?
MLO_PAUSE_TX : 0;
status->pause |= (ld_abil & ADVERTISE_1000XPAUSE) ?
MLO_PAUSE_RX : 0;
} else {
status->pause = MLO_PAUSE_NONE;
}
}
static int sparx5_get_dev2g5_status(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_status *status)
{
u32 portno = port->portno;
u16 lp_adv, ld_adv;
u32 value;
/* Get PCS Link down sticky */
value = spx5_rd(sparx5, DEV2G5_PCS1G_STICKY(portno));
status->link_down = DEV2G5_PCS1G_STICKY_LINK_DOWN_STICKY_GET(value);
if (status->link_down) /* Clear the sticky */
spx5_wr(value, sparx5, DEV2G5_PCS1G_STICKY(portno));
/* Get both current Link and Sync status */
value = spx5_rd(sparx5, DEV2G5_PCS1G_LINK_STATUS(portno));
status->link = DEV2G5_PCS1G_LINK_STATUS_LINK_STATUS_GET(value) &&
DEV2G5_PCS1G_LINK_STATUS_SYNC_STATUS_GET(value);
if (port->conf.portmode == PHY_INTERFACE_MODE_1000BASEX)
status->speed = SPEED_1000;
else if (port->conf.portmode == PHY_INTERFACE_MODE_2500BASEX)
status->speed = SPEED_2500;
status->duplex = DUPLEX_FULL;
/* Get PCS ANEG status register */
value = spx5_rd(sparx5, DEV2G5_PCS1G_ANEG_STATUS(portno));
/* Aneg complete provides more information */
if (DEV2G5_PCS1G_ANEG_STATUS_ANEG_COMPLETE_GET(value)) {
lp_adv = DEV2G5_PCS1G_ANEG_STATUS_LP_ADV_ABILITY_GET(value);
if (port->conf.portmode == PHY_INTERFACE_MODE_SGMII) {
decode_sgmii_word(lp_adv, status);
} else {
value = spx5_rd(sparx5, DEV2G5_PCS1G_ANEG_CFG(portno));
ld_adv = DEV2G5_PCS1G_ANEG_CFG_ADV_ABILITY_GET(value);
decode_cl37_word(lp_adv, ld_adv, status);
}
}
return 0;
}
static int sparx5_get_sfi_status(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_status *status)
{
bool high_speed_dev = sparx5_is_baser(port->conf.portmode);
u32 portno = port->portno;
u32 value, dev, tinst;
void __iomem *inst;
if (!high_speed_dev) {
netdev_err(port->ndev, "error: low speed and SFI mode\n");
return -EINVAL;
}
dev = sparx5_to_high_dev(portno);
tinst = sparx5_port_dev_index(portno);
inst = spx5_inst_get(sparx5, dev, tinst);
value = spx5_inst_rd(inst, DEV10G_MAC_TX_MONITOR_STICKY(0));
if (value != DEV10G_MAC_TX_MONITOR_STICKY_IDLE_STATE_STICKY) {
/* The link is or has been down. Clear the sticky bit */
status->link_down = 1;
spx5_inst_wr(0xffffffff, inst, DEV10G_MAC_TX_MONITOR_STICKY(0));
value = spx5_inst_rd(inst, DEV10G_MAC_TX_MONITOR_STICKY(0));
}
status->link = (value == DEV10G_MAC_TX_MONITOR_STICKY_IDLE_STATE_STICKY);
status->duplex = DUPLEX_FULL;
if (port->conf.portmode == PHY_INTERFACE_MODE_5GBASER)
status->speed = SPEED_5000;
else if (port->conf.portmode == PHY_INTERFACE_MODE_10GBASER)
status->speed = SPEED_10000;
else
status->speed = SPEED_25000;
return 0;
}
/* Get link status of 1000Base-X/in-band and SFI ports.
*/
int sparx5_get_port_status(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_status *status)
{
memset(status, 0, sizeof(*status));
status->speed = port->conf.speed;
if (port->conf.power_down) {
status->link = false;
return 0;
}
switch (port->conf.portmode) {
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_QSGMII:
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_2500BASEX:
return sparx5_get_dev2g5_status(sparx5, port, status);
case PHY_INTERFACE_MODE_5GBASER:
case PHY_INTERFACE_MODE_10GBASER:
case PHY_INTERFACE_MODE_25GBASER:
return sparx5_get_sfi_status(sparx5, port, status);
case PHY_INTERFACE_MODE_NA:
return 0;
default:
netdev_err(port->ndev, "Status not supported");
return -ENODEV;
}
return 0;
}
static int sparx5_port_error(struct sparx5_port *port,
struct sparx5_port_config *conf,
enum port_error errtype)
{
switch (errtype) {
case SPX5_PERR_SPEED:
netdev_err(port->ndev,
"Interface does not support speed: %u: for %s\n",
conf->speed, phy_modes(conf->portmode));
break;
case SPX5_PERR_IFTYPE:
netdev_err(port->ndev,
"Switch port does not support interface type: %s\n",
phy_modes(conf->portmode));
break;
default:
netdev_err(port->ndev,
"Interface configuration error\n");
}
return -EINVAL;
}
static int sparx5_port_verify_speed(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
if ((sparx5_port_is_2g5(port->portno) &&
conf->speed > SPEED_2500) ||
(sparx5_port_is_5g(port->portno) &&
conf->speed > SPEED_5000) ||
(sparx5_port_is_10g(port->portno) &&
conf->speed > SPEED_10000))
return sparx5_port_error(port, conf, SPX5_PERR_SPEED);
switch (conf->portmode) {
case PHY_INTERFACE_MODE_NA:
return -EINVAL;
case PHY_INTERFACE_MODE_1000BASEX:
if (conf->speed != SPEED_1000 ||
sparx5_port_is_2g5(port->portno))
return sparx5_port_error(port, conf, SPX5_PERR_SPEED);
if (sparx5_port_is_2g5(port->portno))
return sparx5_port_error(port, conf, SPX5_PERR_IFTYPE);
break;
case PHY_INTERFACE_MODE_2500BASEX:
if (conf->speed != SPEED_2500 ||
sparx5_port_is_2g5(port->portno))
return sparx5_port_error(port, conf, SPX5_PERR_SPEED);
break;
case PHY_INTERFACE_MODE_QSGMII:
if (port->portno > 47)
return sparx5_port_error(port, conf, SPX5_PERR_IFTYPE);
fallthrough;
case PHY_INTERFACE_MODE_SGMII:
if (conf->speed != SPEED_1000 &&
conf->speed != SPEED_100 &&
conf->speed != SPEED_10 &&
conf->speed != SPEED_2500)
return sparx5_port_error(port, conf, SPX5_PERR_SPEED);
break;
case PHY_INTERFACE_MODE_5GBASER:
case PHY_INTERFACE_MODE_10GBASER:
case PHY_INTERFACE_MODE_25GBASER:
if ((conf->speed != SPEED_5000 &&
conf->speed != SPEED_10000 &&
conf->speed != SPEED_25000))
return sparx5_port_error(port, conf, SPX5_PERR_SPEED);
break;
default:
return sparx5_port_error(port, conf, SPX5_PERR_IFTYPE);
}
return 0;
}
static bool sparx5_dev_change(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
return sparx5_is_baser(port->conf.portmode) ^
sparx5_is_baser(conf->portmode);
}
static int sparx5_port_flush_poll(struct sparx5 *sparx5, u32 portno)
{
u32 value, resource, prio, delay_cnt = 0;
bool poll_src = true;
char *mem = "";
/* Resource == 0: Memory tracked per source (SRC-MEM)
* Resource == 1: Frame references tracked per source (SRC-REF)
* Resource == 2: Memory tracked per destination (DST-MEM)
* Resource == 3: Frame references tracked per destination. (DST-REF)
*/
while (1) {
bool empty = true;
for (resource = 0; resource < (poll_src ? 2 : 1); resource++) {
u32 base;
base = (resource == 0 ? 2048 : 0) + SPX5_PRIOS * portno;
for (prio = 0; prio < SPX5_PRIOS; prio++) {
value = spx5_rd(sparx5,
QRES_RES_STAT(base + prio));
if (value) {
mem = resource == 0 ?
"DST-MEM" : "SRC-MEM";
empty = false;
}
}
}
if (empty)
break;
if (delay_cnt++ == 2000) {
dev_err(sparx5->dev,
"Flush timeout port %u. %s queue not empty\n",
portno, mem);
return -EINVAL;
}
usleep_range(SPX5_WAIT_US, SPX5_WAIT_MAX_US);
}
return 0;
}
static int sparx5_port_disable(struct sparx5 *sparx5, struct sparx5_port *port, bool high_spd_dev)
{
u32 tinst = high_spd_dev ?
sparx5_port_dev_index(port->portno) : port->portno;
u32 dev = high_spd_dev ?
sparx5_to_high_dev(port->portno) : TARGET_DEV2G5;
void __iomem *devinst = spx5_inst_get(sparx5, dev, tinst);
u32 spd = port->conf.speed;
u32 spd_prm;
int err;
if (high_spd_dev) {
/* 1: Reset the PCS Rx clock domain */
spx5_inst_rmw(DEV10G_DEV_RST_CTRL_PCS_RX_RST,
DEV10G_DEV_RST_CTRL_PCS_RX_RST,
devinst,
DEV10G_DEV_RST_CTRL(0));
/* 2: Disable MAC frame reception */
spx5_inst_rmw(0,
DEV10G_MAC_ENA_CFG_RX_ENA,
devinst,
DEV10G_MAC_ENA_CFG(0));
} else {
/* 1: Reset the PCS Rx clock domain */
spx5_inst_rmw(DEV2G5_DEV_RST_CTRL_PCS_RX_RST,
DEV2G5_DEV_RST_CTRL_PCS_RX_RST,
devinst,
DEV2G5_DEV_RST_CTRL(0));
/* 2: Disable MAC frame reception */
spx5_inst_rmw(0,
DEV2G5_MAC_ENA_CFG_RX_ENA,
devinst,
DEV2G5_MAC_ENA_CFG(0));
}
/* 3: Disable traffic being sent to or from switch port->portno */
spx5_rmw(0,
QFWD_SWITCH_PORT_MODE_PORT_ENA,
sparx5,
QFWD_SWITCH_PORT_MODE(port->portno));
/* 4: Disable dequeuing from the egress queues */
spx5_rmw(HSCH_PORT_MODE_DEQUEUE_DIS,
HSCH_PORT_MODE_DEQUEUE_DIS,
sparx5,
HSCH_PORT_MODE(port->portno));
/* 5: Disable Flowcontrol */
spx5_rmw(QSYS_PAUSE_CFG_PAUSE_STOP_SET(0xFFF - 1),
QSYS_PAUSE_CFG_PAUSE_STOP,
sparx5,
QSYS_PAUSE_CFG(port->portno));
spd_prm = spd == SPEED_10 ? 1000 : spd == SPEED_100 ? 100 : 10;
/* 6: Wait while the last frame is exiting the queues */
usleep_range(8 * spd_prm, 10 * spd_prm);
/* 7: Flush the queues accociated with the port->portno */
spx5_rmw(HSCH_FLUSH_CTRL_FLUSH_PORT_SET(port->portno) |
HSCH_FLUSH_CTRL_FLUSH_DST_SET(1) |
HSCH_FLUSH_CTRL_FLUSH_SRC_SET(1) |
HSCH_FLUSH_CTRL_FLUSH_ENA_SET(1),
HSCH_FLUSH_CTRL_FLUSH_PORT |
HSCH_FLUSH_CTRL_FLUSH_DST |
HSCH_FLUSH_CTRL_FLUSH_SRC |
HSCH_FLUSH_CTRL_FLUSH_ENA,
sparx5,
HSCH_FLUSH_CTRL);
/* 8: Enable dequeuing from the egress queues */
spx5_rmw(0,
HSCH_PORT_MODE_DEQUEUE_DIS,
sparx5,
HSCH_PORT_MODE(port->portno));
/* 9: Wait until flushing is complete */
err = sparx5_port_flush_poll(sparx5, port->portno);
if (err)
return err;
/* 10: Reset the MAC clock domain */
if (high_spd_dev) {
spx5_inst_rmw(DEV10G_DEV_RST_CTRL_PCS_TX_RST_SET(1) |
DEV10G_DEV_RST_CTRL_MAC_RX_RST_SET(1) |
DEV10G_DEV_RST_CTRL_MAC_TX_RST_SET(1),
DEV10G_DEV_RST_CTRL_PCS_TX_RST |
DEV10G_DEV_RST_CTRL_MAC_RX_RST |
DEV10G_DEV_RST_CTRL_MAC_TX_RST,
devinst,
DEV10G_DEV_RST_CTRL(0));
} else {
spx5_inst_rmw(DEV2G5_DEV_RST_CTRL_SPEED_SEL_SET(3) |
DEV2G5_DEV_RST_CTRL_PCS_TX_RST_SET(1) |
DEV2G5_DEV_RST_CTRL_PCS_RX_RST_SET(1) |
DEV2G5_DEV_RST_CTRL_MAC_TX_RST_SET(1) |
DEV2G5_DEV_RST_CTRL_MAC_RX_RST_SET(1),
DEV2G5_DEV_RST_CTRL_SPEED_SEL |
DEV2G5_DEV_RST_CTRL_PCS_TX_RST |
DEV2G5_DEV_RST_CTRL_PCS_RX_RST |
DEV2G5_DEV_RST_CTRL_MAC_TX_RST |
DEV2G5_DEV_RST_CTRL_MAC_RX_RST,
devinst,
DEV2G5_DEV_RST_CTRL(0));
}
/* 11: Clear flushing */
spx5_rmw(HSCH_FLUSH_CTRL_FLUSH_PORT_SET(port->portno) |
HSCH_FLUSH_CTRL_FLUSH_ENA_SET(0),
HSCH_FLUSH_CTRL_FLUSH_PORT |
HSCH_FLUSH_CTRL_FLUSH_ENA,
sparx5,
HSCH_FLUSH_CTRL);
if (high_spd_dev) {
u32 pcs = sparx5_to_pcs_dev(port->portno);
void __iomem *pcsinst = spx5_inst_get(sparx5, pcs, tinst);
/* 12: Disable 5G/10G/25 BaseR PCS */
spx5_inst_rmw(PCS10G_BR_PCS_CFG_PCS_ENA_SET(0),
PCS10G_BR_PCS_CFG_PCS_ENA,
pcsinst,
PCS10G_BR_PCS_CFG(0));
if (sparx5_port_is_25g(port->portno))
/* Disable 25G PCS */
spx5_rmw(DEV25G_PCS25G_CFG_PCS25G_ENA_SET(0),
DEV25G_PCS25G_CFG_PCS25G_ENA,
sparx5,
DEV25G_PCS25G_CFG(tinst));
} else {
/* 12: Disable 1G PCS */
spx5_rmw(DEV2G5_PCS1G_CFG_PCS_ENA_SET(0),
DEV2G5_PCS1G_CFG_PCS_ENA,
sparx5,
DEV2G5_PCS1G_CFG(port->portno));
}
/* The port is now flushed and disabled */
return 0;
}
static int sparx5_port_fifo_sz(struct sparx5 *sparx5,
u32 portno, u32 speed)
{
u32 sys_clk = sparx5_clk_period(sparx5->coreclock);
const u32 taxi_dist[SPX5_PORTS_ALL] = {
6, 8, 10, 6, 8, 10, 6, 8, 10, 6, 8, 10,
4, 4, 4, 4,
11, 12, 13, 14, 15, 16, 17, 18,
11, 12, 13, 14, 15, 16, 17, 18,
11, 12, 13, 14, 15, 16, 17, 18,
11, 12, 13, 14, 15, 16, 17, 18,
4, 6, 8, 4, 6, 8, 6, 8,
2, 2, 2, 2, 2, 2, 2, 4, 2
};
u32 mac_per = 6400, tmp1, tmp2, tmp3;
u32 fifo_width = 16;
u32 mac_width = 8;
u32 addition = 0;
switch (speed) {
case SPEED_25000:
return 0;
case SPEED_10000:
mac_per = 6400;
mac_width = 8;
addition = 1;
break;
case SPEED_5000:
mac_per = 12800;
mac_width = 8;
addition = 0;
break;
case SPEED_2500:
mac_per = 3200;
mac_width = 1;
addition = 0;
break;
case SPEED_1000:
mac_per = 8000;
mac_width = 1;
addition = 0;
break;
case SPEED_100:
case SPEED_10:
return 1;
default:
break;
}
tmp1 = 1000 * mac_width / fifo_width;
tmp2 = 3000 + ((12000 + 2 * taxi_dist[portno] * 1000)
* sys_clk / mac_per);
tmp3 = tmp1 * tmp2 / 1000;
return (tmp3 + 2000 + 999) / 1000 + addition;
}
/* Configure port muxing:
* QSGMII: 4x2G5 devices
*/
static int sparx5_port_mux_set(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
u32 portno = port->portno;
u32 inst;
if (port->conf.portmode == conf->portmode)
return 0; /* Nothing to do */
switch (conf->portmode) {
case PHY_INTERFACE_MODE_QSGMII: /* QSGMII: 4x2G5 devices. Mode Q' */
inst = (portno - portno % 4) / 4;
spx5_rmw(BIT(inst),
BIT(inst),
sparx5,
PORT_CONF_QSGMII_ENA);
if ((portno / 4 % 2) == 0) {
/* Affects d0-d3,d8-d11..d40-d43 */
spx5_rmw(PORT_CONF_USGMII_CFG_BYPASS_SCRAM_SET(1) |
PORT_CONF_USGMII_CFG_BYPASS_DESCRAM_SET(1) |
PORT_CONF_USGMII_CFG_QUAD_MODE_SET(1),
PORT_CONF_USGMII_CFG_BYPASS_SCRAM |
PORT_CONF_USGMII_CFG_BYPASS_DESCRAM |
PORT_CONF_USGMII_CFG_QUAD_MODE,
sparx5,
PORT_CONF_USGMII_CFG((portno / 8)));
}
break;
default:
break;
}
return 0;
}
static int sparx5_port_max_tags_set(struct sparx5 *sparx5,
struct sparx5_port *port)
{
enum sparx5_port_max_tags max_tags = port->max_vlan_tags;
int tag_ct = max_tags == SPX5_PORT_MAX_TAGS_ONE ? 1 :
max_tags == SPX5_PORT_MAX_TAGS_TWO ? 2 : 0;
bool dtag = max_tags == SPX5_PORT_MAX_TAGS_TWO;
enum sparx5_vlan_port_type vlan_type = port->vlan_type;
bool dotag = max_tags != SPX5_PORT_MAX_TAGS_NONE;
u32 dev = sparx5_to_high_dev(port->portno);
u32 tinst = sparx5_port_dev_index(port->portno);
void __iomem *inst = spx5_inst_get(sparx5, dev, tinst);
u32 etype;
etype = (vlan_type == SPX5_VLAN_PORT_TYPE_S_CUSTOM ?
port->custom_etype :
vlan_type == SPX5_VLAN_PORT_TYPE_C ?
SPX5_ETYPE_TAG_C : SPX5_ETYPE_TAG_S);
spx5_wr(DEV2G5_MAC_TAGS_CFG_TAG_ID_SET(etype) |
DEV2G5_MAC_TAGS_CFG_PB_ENA_SET(dtag) |
DEV2G5_MAC_TAGS_CFG_VLAN_AWR_ENA_SET(dotag) |
DEV2G5_MAC_TAGS_CFG_VLAN_LEN_AWR_ENA_SET(dotag),
sparx5,
DEV2G5_MAC_TAGS_CFG(port->portno));
if (sparx5_port_is_2g5(port->portno))
return 0;
spx5_inst_rmw(DEV10G_MAC_TAGS_CFG_TAG_ID_SET(etype) |
DEV10G_MAC_TAGS_CFG_TAG_ENA_SET(dotag),
DEV10G_MAC_TAGS_CFG_TAG_ID |
DEV10G_MAC_TAGS_CFG_TAG_ENA,
inst,
DEV10G_MAC_TAGS_CFG(0, 0));
spx5_inst_rmw(DEV10G_MAC_NUM_TAGS_CFG_NUM_TAGS_SET(tag_ct),
DEV10G_MAC_NUM_TAGS_CFG_NUM_TAGS,
inst,
DEV10G_MAC_NUM_TAGS_CFG(0));
spx5_inst_rmw(DEV10G_MAC_MAXLEN_CFG_MAX_LEN_TAG_CHK_SET(dotag),
DEV10G_MAC_MAXLEN_CFG_MAX_LEN_TAG_CHK,
inst,
DEV10G_MAC_MAXLEN_CFG(0));
return 0;
}
int sparx5_port_fwd_urg(struct sparx5 *sparx5, u32 speed)
{
u32 clk_period_ps = 1600; /* 625Mhz for now */
u32 urg = 672000;
switch (speed) {
case SPEED_10:
case SPEED_100:
case SPEED_1000:
urg = 672000;
break;
case SPEED_2500:
urg = 270000;
break;
case SPEED_5000:
urg = 135000;
break;
case SPEED_10000:
urg = 67200;
break;
case SPEED_25000:
urg = 27000;
break;
}
return urg / clk_period_ps - 1;
}
static u16 sparx5_wm_enc(u16 value)
{
if (value >= 2048)
return 2048 + value / 16;
return value;
}
static int sparx5_port_fc_setup(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
bool fc_obey = conf->pause & MLO_PAUSE_RX ? 1 : 0;
u32 pause_stop = 0xFFF - 1; /* FC gen disabled */
if (conf->pause & MLO_PAUSE_TX)
pause_stop = sparx5_wm_enc(4 * (ETH_MAXLEN /
SPX5_BUFFER_CELL_SZ));
/* Set HDX flowcontrol */
spx5_rmw(DSM_MAC_CFG_HDX_BACKPREASSURE_SET(conf->duplex == DUPLEX_HALF),
DSM_MAC_CFG_HDX_BACKPREASSURE,
sparx5,
DSM_MAC_CFG(port->portno));
/* Obey flowcontrol */
spx5_rmw(DSM_RX_PAUSE_CFG_RX_PAUSE_EN_SET(fc_obey),
DSM_RX_PAUSE_CFG_RX_PAUSE_EN,
sparx5,
DSM_RX_PAUSE_CFG(port->portno));
/* Disable forward pressure */
spx5_rmw(QSYS_FWD_PRESSURE_FWD_PRESSURE_DIS_SET(fc_obey),
QSYS_FWD_PRESSURE_FWD_PRESSURE_DIS,
sparx5,
QSYS_FWD_PRESSURE(port->portno));
/* Generate pause frames */
spx5_rmw(QSYS_PAUSE_CFG_PAUSE_STOP_SET(pause_stop),
QSYS_PAUSE_CFG_PAUSE_STOP,
sparx5,
QSYS_PAUSE_CFG(port->portno));
return 0;
}
static u16 sparx5_get_aneg_word(struct sparx5_port_config *conf)
{
if (conf->portmode == PHY_INTERFACE_MODE_1000BASEX) /* cl-37 aneg */
return (conf->pause_adv | ADVERTISE_LPACK | ADVERTISE_1000XFULL);
else
return 1; /* Enable SGMII Aneg */
}
int sparx5_serdes_set(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
int portmode, err, speed = conf->speed;
if (conf->portmode == PHY_INTERFACE_MODE_QSGMII &&
((port->portno % 4) != 0)) {
return 0;
}
if (sparx5_is_baser(conf->portmode)) {
if (conf->portmode == PHY_INTERFACE_MODE_25GBASER)
speed = SPEED_25000;
else if (conf->portmode == PHY_INTERFACE_MODE_10GBASER)
speed = SPEED_10000;
else
speed = SPEED_5000;
}
err = phy_set_media(port->serdes, conf->media);
if (err)
return err;
if (speed > 0) {
err = phy_set_speed(port->serdes, speed);
if (err)
return err;
}
if (conf->serdes_reset) {
err = phy_reset(port->serdes);
if (err)
return err;
}
/* Configure SerDes with port parameters
* For BaseR, the serdes driver supports 10GGBASE-R and speed 5G/10G/25G
*/
portmode = conf->portmode;
if (sparx5_is_baser(conf->portmode))
portmode = PHY_INTERFACE_MODE_10GBASER;
err = phy_set_mode_ext(port->serdes, PHY_MODE_ETHERNET, portmode);
if (err)
return err;
conf->serdes_reset = false;
return err;
}
static int sparx5_port_pcs_low_set(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
bool sgmii = false, inband_aneg = false;
int err;
if (port->conf.inband) {
if (conf->portmode == PHY_INTERFACE_MODE_SGMII ||
conf->portmode == PHY_INTERFACE_MODE_QSGMII)
inband_aneg = true; /* Cisco-SGMII in-band-aneg */
else if (conf->portmode == PHY_INTERFACE_MODE_1000BASEX &&
conf->autoneg)
inband_aneg = true; /* Clause-37 in-band-aneg */
err = sparx5_serdes_set(sparx5, port, conf);
if (err)
return -EINVAL;
} else {
sgmii = true; /* Phy is connected to the MAC */
}
/* Choose SGMII or 1000BaseX/2500BaseX PCS mode */
spx5_rmw(DEV2G5_PCS1G_MODE_CFG_SGMII_MODE_ENA_SET(sgmii),
DEV2G5_PCS1G_MODE_CFG_SGMII_MODE_ENA,
sparx5,
DEV2G5_PCS1G_MODE_CFG(port->portno));
/* Enable PCS */
spx5_wr(DEV2G5_PCS1G_CFG_PCS_ENA_SET(1),
sparx5,
DEV2G5_PCS1G_CFG(port->portno));
if (inband_aneg) {
u16 abil = sparx5_get_aneg_word(conf);
/* Enable in-band aneg */
spx5_wr(DEV2G5_PCS1G_ANEG_CFG_ADV_ABILITY_SET(abil) |
DEV2G5_PCS1G_ANEG_CFG_SW_RESOLVE_ENA_SET(1) |
DEV2G5_PCS1G_ANEG_CFG_ANEG_ENA_SET(1) |
DEV2G5_PCS1G_ANEG_CFG_ANEG_RESTART_ONE_SHOT_SET(1),
sparx5,
DEV2G5_PCS1G_ANEG_CFG(port->portno));
} else {
spx5_wr(0, sparx5, DEV2G5_PCS1G_ANEG_CFG(port->portno));
}
/* Take PCS out of reset */
spx5_rmw(DEV2G5_DEV_RST_CTRL_SPEED_SEL_SET(2) |
DEV2G5_DEV_RST_CTRL_PCS_TX_RST_SET(0) |
DEV2G5_DEV_RST_CTRL_PCS_RX_RST_SET(0),
DEV2G5_DEV_RST_CTRL_SPEED_SEL |
DEV2G5_DEV_RST_CTRL_PCS_TX_RST |
DEV2G5_DEV_RST_CTRL_PCS_RX_RST,
sparx5,
DEV2G5_DEV_RST_CTRL(port->portno));
return 0;
}
static int sparx5_port_pcs_high_set(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
u32 clk_spd = conf->portmode == PHY_INTERFACE_MODE_5GBASER ? 1 : 0;
u32 pix = sparx5_port_dev_index(port->portno);
u32 dev = sparx5_to_high_dev(port->portno);
u32 pcs = sparx5_to_pcs_dev(port->portno);
void __iomem *devinst;
void __iomem *pcsinst;
int err;
devinst = spx5_inst_get(sparx5, dev, pix);
pcsinst = spx5_inst_get(sparx5, pcs, pix);
/* SFI : No in-band-aneg. Speeds 5G/10G/25G */
err = sparx5_serdes_set(sparx5, port, conf);
if (err)
return -EINVAL;
if (conf->portmode == PHY_INTERFACE_MODE_25GBASER) {
/* Enable PCS for 25G device, speed 25G */
spx5_rmw(DEV25G_PCS25G_CFG_PCS25G_ENA_SET(1),
DEV25G_PCS25G_CFG_PCS25G_ENA,
sparx5,
DEV25G_PCS25G_CFG(pix));
} else {
/* Enable PCS for 5G/10G/25G devices, speed 5G/10G */
spx5_inst_rmw(PCS10G_BR_PCS_CFG_PCS_ENA_SET(1),
PCS10G_BR_PCS_CFG_PCS_ENA,
pcsinst,
PCS10G_BR_PCS_CFG(0));
}
/* Enable 5G/10G/25G MAC module */
spx5_inst_wr(DEV10G_MAC_ENA_CFG_RX_ENA_SET(1) |
DEV10G_MAC_ENA_CFG_TX_ENA_SET(1),
devinst,
DEV10G_MAC_ENA_CFG(0));
/* Take the device out of reset */
spx5_inst_rmw(DEV10G_DEV_RST_CTRL_PCS_RX_RST_SET(0) |
DEV10G_DEV_RST_CTRL_PCS_TX_RST_SET(0) |
DEV10G_DEV_RST_CTRL_MAC_RX_RST_SET(0) |
DEV10G_DEV_RST_CTRL_MAC_TX_RST_SET(0) |
DEV10G_DEV_RST_CTRL_SPEED_SEL_SET(clk_spd),
DEV10G_DEV_RST_CTRL_PCS_RX_RST |
DEV10G_DEV_RST_CTRL_PCS_TX_RST |
DEV10G_DEV_RST_CTRL_MAC_RX_RST |
DEV10G_DEV_RST_CTRL_MAC_TX_RST |
DEV10G_DEV_RST_CTRL_SPEED_SEL,
devinst,
DEV10G_DEV_RST_CTRL(0));
return 0;
}
/* Switch between 1G/2500 and 5G/10G/25G devices */
static void sparx5_dev_switch(struct sparx5 *sparx5, int port, bool hsd)
{
int bt_indx = BIT(sparx5_port_dev_index(port));
if (sparx5_port_is_5g(port)) {
spx5_rmw(hsd ? 0 : bt_indx,
bt_indx,
sparx5,
PORT_CONF_DEV5G_MODES);
} else if (sparx5_port_is_10g(port)) {
spx5_rmw(hsd ? 0 : bt_indx,
bt_indx,
sparx5,
PORT_CONF_DEV10G_MODES);
} else if (sparx5_port_is_25g(port)) {
spx5_rmw(hsd ? 0 : bt_indx,
bt_indx,
sparx5,
PORT_CONF_DEV25G_MODES);
}
}
/* Configure speed/duplex dependent registers */
static int sparx5_port_config_low_set(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
u32 clk_spd, gig_mode, tx_gap, hdx_gap_1, hdx_gap_2;
bool fdx = conf->duplex == DUPLEX_FULL;
int spd = conf->speed;
clk_spd = spd == SPEED_10 ? 0 : spd == SPEED_100 ? 1 : 2;
gig_mode = spd == SPEED_1000 || spd == SPEED_2500;
tx_gap = spd == SPEED_1000 ? 4 : fdx ? 6 : 5;
hdx_gap_1 = spd == SPEED_1000 ? 0 : spd == SPEED_100 ? 1 : 2;
hdx_gap_2 = spd == SPEED_1000 ? 0 : spd == SPEED_100 ? 4 : 1;
/* GIG/FDX mode */
spx5_rmw(DEV2G5_MAC_MODE_CFG_GIGA_MODE_ENA_SET(gig_mode) |
DEV2G5_MAC_MODE_CFG_FDX_ENA_SET(fdx),
DEV2G5_MAC_MODE_CFG_GIGA_MODE_ENA |
DEV2G5_MAC_MODE_CFG_FDX_ENA,
sparx5,
DEV2G5_MAC_MODE_CFG(port->portno));
/* Set MAC IFG Gaps */
spx5_wr(DEV2G5_MAC_IFG_CFG_TX_IFG_SET(tx_gap) |
DEV2G5_MAC_IFG_CFG_RX_IFG1_SET(hdx_gap_1) |
DEV2G5_MAC_IFG_CFG_RX_IFG2_SET(hdx_gap_2),
sparx5,
DEV2G5_MAC_IFG_CFG(port->portno));
/* Disabling frame aging when in HDX (due to HDX issue) */
spx5_rmw(HSCH_PORT_MODE_AGE_DIS_SET(fdx == 0),
HSCH_PORT_MODE_AGE_DIS,
sparx5,
HSCH_PORT_MODE(port->portno));
/* Enable MAC module */
spx5_wr(DEV2G5_MAC_ENA_CFG_RX_ENA |
DEV2G5_MAC_ENA_CFG_TX_ENA,
sparx5,
DEV2G5_MAC_ENA_CFG(port->portno));
/* Select speed and take MAC out of reset */
spx5_rmw(DEV2G5_DEV_RST_CTRL_SPEED_SEL_SET(clk_spd) |
DEV2G5_DEV_RST_CTRL_MAC_TX_RST_SET(0) |
DEV2G5_DEV_RST_CTRL_MAC_RX_RST_SET(0),
DEV2G5_DEV_RST_CTRL_SPEED_SEL |
DEV2G5_DEV_RST_CTRL_MAC_TX_RST |
DEV2G5_DEV_RST_CTRL_MAC_RX_RST,
sparx5,
DEV2G5_DEV_RST_CTRL(port->portno));
return 0;
}
int sparx5_port_pcs_set(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
bool high_speed_dev = sparx5_is_baser(conf->portmode);
int err;
if (sparx5_dev_change(sparx5, port, conf)) {
/* switch device */
sparx5_dev_switch(sparx5, port->portno, high_speed_dev);
/* Disable the not-in-use device */
err = sparx5_port_disable(sparx5, port, !high_speed_dev);
if (err)
return err;
}
/* Disable the port before re-configuring */
err = sparx5_port_disable(sparx5, port, high_speed_dev);
if (err)
return -EINVAL;
if (high_speed_dev)
err = sparx5_port_pcs_high_set(sparx5, port, conf);
else
err = sparx5_port_pcs_low_set(sparx5, port, conf);
if (err)
return -EINVAL;
if (port->conf.inband) {
/* Enable/disable 1G counters in ASM */
spx5_rmw(ASM_PORT_CFG_CSC_STAT_DIS_SET(high_speed_dev),
ASM_PORT_CFG_CSC_STAT_DIS,
sparx5,
ASM_PORT_CFG(port->portno));
/* Enable/disable 1G counters in DSM */
spx5_rmw(DSM_BUF_CFG_CSC_STAT_DIS_SET(high_speed_dev),
DSM_BUF_CFG_CSC_STAT_DIS,
sparx5,
DSM_BUF_CFG(port->portno));
}
port->conf = *conf;
return 0;
}
int sparx5_port_config(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
bool high_speed_dev = sparx5_is_baser(conf->portmode);
int err, urgency, stop_wm;
err = sparx5_port_verify_speed(sparx5, port, conf);
if (err)
return err;
/* high speed device is already configured */
if (!high_speed_dev)
sparx5_port_config_low_set(sparx5, port, conf);
/* Configure flow control */
err = sparx5_port_fc_setup(sparx5, port, conf);
if (err)
return err;
/* Set the DSM stop watermark */
stop_wm = sparx5_port_fifo_sz(sparx5, port->portno, conf->speed);
spx5_rmw(DSM_DEV_TX_STOP_WM_CFG_DEV_TX_STOP_WM_SET(stop_wm),
DSM_DEV_TX_STOP_WM_CFG_DEV_TX_STOP_WM,
sparx5,
DSM_DEV_TX_STOP_WM_CFG(port->portno));
/* Enable port in queue system */
urgency = sparx5_port_fwd_urg(sparx5, conf->speed);
spx5_rmw(QFWD_SWITCH_PORT_MODE_PORT_ENA_SET(1) |
QFWD_SWITCH_PORT_MODE_FWD_URGENCY_SET(urgency),
QFWD_SWITCH_PORT_MODE_PORT_ENA |
QFWD_SWITCH_PORT_MODE_FWD_URGENCY,
sparx5,
QFWD_SWITCH_PORT_MODE(port->portno));
/* Save the new values */
port->conf = *conf;
return 0;
}
/* Initialize port config to default */
int sparx5_port_init(struct sparx5 *sparx5,
struct sparx5_port *port,
struct sparx5_port_config *conf)
{
u32 pause_start = sparx5_wm_enc(6 * (ETH_MAXLEN / SPX5_BUFFER_CELL_SZ));
u32 atop = sparx5_wm_enc(20 * (ETH_MAXLEN / SPX5_BUFFER_CELL_SZ));
u32 devhigh = sparx5_to_high_dev(port->portno);
u32 pix = sparx5_port_dev_index(port->portno);
u32 pcs = sparx5_to_pcs_dev(port->portno);
bool sd_pol = port->signd_active_high;
bool sd_sel = !port->signd_internal;
bool sd_ena = port->signd_enable;
u32 pause_stop = 0xFFF - 1; /* FC generate disabled */
void __iomem *devinst;
void __iomem *pcsinst;
int err;
devinst = spx5_inst_get(sparx5, devhigh, pix);
pcsinst = spx5_inst_get(sparx5, pcs, pix);
/* Set the mux port mode */
err = sparx5_port_mux_set(sparx5, port, conf);
if (err)
return err;
/* Configure MAC vlan awareness */
err = sparx5_port_max_tags_set(sparx5, port);
if (err)
return err;
/* Set Max Length */
spx5_rmw(DEV2G5_MAC_MAXLEN_CFG_MAX_LEN_SET(ETH_MAXLEN),
DEV2G5_MAC_MAXLEN_CFG_MAX_LEN,
sparx5,
DEV2G5_MAC_MAXLEN_CFG(port->portno));
/* 1G/2G5: Signal Detect configuration */
spx5_wr(DEV2G5_PCS1G_SD_CFG_SD_POL_SET(sd_pol) |
DEV2G5_PCS1G_SD_CFG_SD_SEL_SET(sd_sel) |
DEV2G5_PCS1G_SD_CFG_SD_ENA_SET(sd_ena),
sparx5,
DEV2G5_PCS1G_SD_CFG(port->portno));
/* Set Pause WM hysteresis */
spx5_rmw(QSYS_PAUSE_CFG_PAUSE_START_SET(pause_start) |
QSYS_PAUSE_CFG_PAUSE_STOP_SET(pause_stop) |
QSYS_PAUSE_CFG_PAUSE_ENA_SET(1),
QSYS_PAUSE_CFG_PAUSE_START |
QSYS_PAUSE_CFG_PAUSE_STOP |
QSYS_PAUSE_CFG_PAUSE_ENA,
sparx5,
QSYS_PAUSE_CFG(port->portno));
/* Port ATOP. Frames are tail dropped when this WM is hit */
spx5_wr(QSYS_ATOP_ATOP_SET(atop),
sparx5,
QSYS_ATOP(port->portno));
/* Discard pause frame 01-80-C2-00-00-01 */
spx5_wr(PAUSE_DISCARD, sparx5, ANA_CL_CAPTURE_BPDU_CFG(port->portno));
if (conf->portmode == PHY_INTERFACE_MODE_QSGMII ||
conf->portmode == PHY_INTERFACE_MODE_SGMII) {
err = sparx5_serdes_set(sparx5, port, conf);
if (err)
return err;
if (!sparx5_port_is_2g5(port->portno))
/* Enable shadow device */
spx5_rmw(DSM_DEV_TX_STOP_WM_CFG_DEV10G_SHADOW_ENA_SET(1),
DSM_DEV_TX_STOP_WM_CFG_DEV10G_SHADOW_ENA,
sparx5,
DSM_DEV_TX_STOP_WM_CFG(port->portno));
sparx5_dev_switch(sparx5, port->portno, false);
}
if (conf->portmode == PHY_INTERFACE_MODE_QSGMII) {
// All ports must be PCS enabled in QSGMII mode
spx5_rmw(DEV2G5_DEV_RST_CTRL_PCS_TX_RST_SET(0),
DEV2G5_DEV_RST_CTRL_PCS_TX_RST,
sparx5,
DEV2G5_DEV_RST_CTRL(port->portno));
}
/* Default IFGs for 1G */
spx5_wr(DEV2G5_MAC_IFG_CFG_TX_IFG_SET(6) |
DEV2G5_MAC_IFG_CFG_RX_IFG1_SET(0) |
DEV2G5_MAC_IFG_CFG_RX_IFG2_SET(0),
sparx5,
DEV2G5_MAC_IFG_CFG(port->portno));
if (sparx5_port_is_2g5(port->portno))
return 0; /* Low speed device only - return */
/* Now setup the high speed device */
if (conf->portmode == PHY_INTERFACE_MODE_NA)
conf->portmode = PHY_INTERFACE_MODE_10GBASER;
if (sparx5_is_baser(conf->portmode))
sparx5_dev_switch(sparx5, port->portno, true);
/* Set Max Length */
spx5_inst_rmw(DEV10G_MAC_MAXLEN_CFG_MAX_LEN_SET(ETH_MAXLEN),
DEV10G_MAC_MAXLEN_CFG_MAX_LEN,
devinst,
DEV10G_MAC_ENA_CFG(0));
/* Handle Signal Detect in 10G PCS */
spx5_inst_wr(PCS10G_BR_PCS_SD_CFG_SD_POL_SET(sd_pol) |
PCS10G_BR_PCS_SD_CFG_SD_SEL_SET(sd_sel) |
PCS10G_BR_PCS_SD_CFG_SD_ENA_SET(sd_ena),
pcsinst,
PCS10G_BR_PCS_SD_CFG(0));
if (sparx5_port_is_25g(port->portno)) {
/* Handle Signal Detect in 25G PCS */
spx5_wr(DEV25G_PCS25G_SD_CFG_SD_POL_SET(sd_pol) |
DEV25G_PCS25G_SD_CFG_SD_SEL_SET(sd_sel) |
DEV25G_PCS25G_SD_CFG_SD_ENA_SET(sd_ena),
sparx5,
DEV25G_PCS25G_SD_CFG(pix));
}
return 0;
}
void sparx5_port_enable(struct sparx5_port *port, bool enable)
{
struct sparx5 *sparx5 = port->sparx5;
/* Enable port for frame transfer? */
spx5_rmw(QFWD_SWITCH_PORT_MODE_PORT_ENA_SET(enable),
QFWD_SWITCH_PORT_MODE_PORT_ENA,
sparx5,
QFWD_SWITCH_PORT_MODE(port->portno));
}