mirror of https://gitee.com/openkylin/linux.git
471 lines
10 KiB
C
471 lines
10 KiB
C
#include <linux/export.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/list.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/phylink.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "sfp.h"
|
|
|
|
struct sfp_bus {
|
|
struct kref kref;
|
|
struct list_head node;
|
|
struct device_node *device_node;
|
|
|
|
const struct sfp_socket_ops *socket_ops;
|
|
struct device *sfp_dev;
|
|
struct sfp *sfp;
|
|
|
|
const struct sfp_upstream_ops *upstream_ops;
|
|
void *upstream;
|
|
struct net_device *netdev;
|
|
struct phy_device *phydev;
|
|
|
|
bool registered;
|
|
bool started;
|
|
};
|
|
|
|
int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
|
|
unsigned long *support)
|
|
{
|
|
int port;
|
|
|
|
/* port is the physical connector, set this from the connector field. */
|
|
switch (id->base.connector) {
|
|
case SFP_CONNECTOR_SC:
|
|
case SFP_CONNECTOR_FIBERJACK:
|
|
case SFP_CONNECTOR_LC:
|
|
case SFP_CONNECTOR_MT_RJ:
|
|
case SFP_CONNECTOR_MU:
|
|
case SFP_CONNECTOR_OPTICAL_PIGTAIL:
|
|
if (support)
|
|
phylink_set(support, FIBRE);
|
|
port = PORT_FIBRE;
|
|
break;
|
|
|
|
case SFP_CONNECTOR_RJ45:
|
|
if (support)
|
|
phylink_set(support, TP);
|
|
port = PORT_TP;
|
|
break;
|
|
|
|
case SFP_CONNECTOR_UNSPEC:
|
|
if (id->base.e1000_base_t) {
|
|
if (support)
|
|
phylink_set(support, TP);
|
|
port = PORT_TP;
|
|
break;
|
|
}
|
|
/* fallthrough */
|
|
case SFP_CONNECTOR_SG: /* guess */
|
|
case SFP_CONNECTOR_MPO_1X12:
|
|
case SFP_CONNECTOR_MPO_2X16:
|
|
case SFP_CONNECTOR_HSSDC_II:
|
|
case SFP_CONNECTOR_COPPER_PIGTAIL:
|
|
case SFP_CONNECTOR_NOSEPARATE:
|
|
case SFP_CONNECTOR_MXC_2X16:
|
|
port = PORT_OTHER;
|
|
break;
|
|
default:
|
|
dev_warn(bus->sfp_dev, "SFP: unknown connector id 0x%02x\n",
|
|
id->base.connector);
|
|
port = PORT_OTHER;
|
|
break;
|
|
}
|
|
|
|
return port;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_parse_port);
|
|
|
|
phy_interface_t sfp_parse_interface(struct sfp_bus *bus,
|
|
const struct sfp_eeprom_id *id)
|
|
{
|
|
phy_interface_t iface;
|
|
|
|
/* Setting the serdes link mode is guesswork: there's no field in
|
|
* the EEPROM which indicates what mode should be used.
|
|
*
|
|
* If the module wants 64b66b, then it must be >= 10G.
|
|
*
|
|
* If it's a gigabit-only fiber module, it probably does not have
|
|
* a PHY, so switch to 802.3z negotiation mode. Otherwise, switch
|
|
* to SGMII mode (which is required to support non-gigabit speeds).
|
|
*/
|
|
switch (id->base.encoding) {
|
|
case SFP_ENCODING_8472_64B66B:
|
|
iface = PHY_INTERFACE_MODE_10GKR;
|
|
break;
|
|
|
|
case SFP_ENCODING_8B10B:
|
|
if (!id->base.e1000_base_t &&
|
|
!id->base.e100_base_lx &&
|
|
!id->base.e100_base_fx)
|
|
iface = PHY_INTERFACE_MODE_1000BASEX;
|
|
else
|
|
iface = PHY_INTERFACE_MODE_SGMII;
|
|
break;
|
|
|
|
default:
|
|
iface = PHY_INTERFACE_MODE_NA;
|
|
dev_err(bus->sfp_dev,
|
|
"SFP module encoding does not support 8b10b nor 64b66b\n");
|
|
break;
|
|
}
|
|
|
|
return iface;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_parse_interface);
|
|
|
|
void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
|
|
unsigned long *support)
|
|
{
|
|
phylink_set(support, Autoneg);
|
|
phylink_set(support, Pause);
|
|
phylink_set(support, Asym_Pause);
|
|
|
|
/* Set ethtool support from the compliance fields. */
|
|
if (id->base.e10g_base_sr)
|
|
phylink_set(support, 10000baseSR_Full);
|
|
if (id->base.e10g_base_lr)
|
|
phylink_set(support, 10000baseLR_Full);
|
|
if (id->base.e10g_base_lrm)
|
|
phylink_set(support, 10000baseLRM_Full);
|
|
if (id->base.e10g_base_er)
|
|
phylink_set(support, 10000baseER_Full);
|
|
if (id->base.e1000_base_sx ||
|
|
id->base.e1000_base_lx ||
|
|
id->base.e1000_base_cx)
|
|
phylink_set(support, 1000baseX_Full);
|
|
if (id->base.e1000_base_t) {
|
|
phylink_set(support, 1000baseT_Half);
|
|
phylink_set(support, 1000baseT_Full);
|
|
}
|
|
|
|
switch (id->base.extended_cc) {
|
|
case 0x00: /* Unspecified */
|
|
break;
|
|
case 0x02: /* 100Gbase-SR4 or 25Gbase-SR */
|
|
phylink_set(support, 100000baseSR4_Full);
|
|
phylink_set(support, 25000baseSR_Full);
|
|
break;
|
|
case 0x03: /* 100Gbase-LR4 or 25Gbase-LR */
|
|
case 0x04: /* 100Gbase-ER4 or 25Gbase-ER */
|
|
phylink_set(support, 100000baseLR4_ER4_Full);
|
|
break;
|
|
case 0x0b: /* 100Gbase-CR4 or 25Gbase-CR CA-L */
|
|
case 0x0c: /* 25Gbase-CR CA-S */
|
|
case 0x0d: /* 25Gbase-CR CA-N */
|
|
phylink_set(support, 100000baseCR4_Full);
|
|
phylink_set(support, 25000baseCR_Full);
|
|
break;
|
|
default:
|
|
dev_warn(bus->sfp_dev,
|
|
"Unknown/unsupported extended compliance code: 0x%02x\n",
|
|
id->base.extended_cc);
|
|
break;
|
|
}
|
|
|
|
/* For fibre channel SFP, derive possible BaseX modes */
|
|
if (id->base.fc_speed_100 ||
|
|
id->base.fc_speed_200 ||
|
|
id->base.fc_speed_400) {
|
|
if (id->base.br_nominal >= 31)
|
|
phylink_set(support, 2500baseX_Full);
|
|
if (id->base.br_nominal >= 12)
|
|
phylink_set(support, 1000baseX_Full);
|
|
}
|
|
|
|
switch (id->base.connector) {
|
|
case SFP_CONNECTOR_SC:
|
|
case SFP_CONNECTOR_FIBERJACK:
|
|
case SFP_CONNECTOR_LC:
|
|
case SFP_CONNECTOR_MT_RJ:
|
|
case SFP_CONNECTOR_MU:
|
|
case SFP_CONNECTOR_OPTICAL_PIGTAIL:
|
|
break;
|
|
|
|
case SFP_CONNECTOR_UNSPEC:
|
|
if (id->base.e1000_base_t)
|
|
break;
|
|
|
|
case SFP_CONNECTOR_SG: /* guess */
|
|
case SFP_CONNECTOR_MPO_1X12:
|
|
case SFP_CONNECTOR_MPO_2X16:
|
|
case SFP_CONNECTOR_HSSDC_II:
|
|
case SFP_CONNECTOR_COPPER_PIGTAIL:
|
|
case SFP_CONNECTOR_NOSEPARATE:
|
|
case SFP_CONNECTOR_MXC_2X16:
|
|
default:
|
|
/* a guess at the supported link modes */
|
|
dev_warn(bus->sfp_dev,
|
|
"Guessing link modes, please report...\n");
|
|
phylink_set(support, 1000baseT_Half);
|
|
phylink_set(support, 1000baseT_Full);
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_parse_support);
|
|
|
|
static LIST_HEAD(sfp_buses);
|
|
static DEFINE_MUTEX(sfp_mutex);
|
|
|
|
static const struct sfp_upstream_ops *sfp_get_upstream_ops(struct sfp_bus *bus)
|
|
{
|
|
return bus->registered ? bus->upstream_ops : NULL;
|
|
}
|
|
|
|
static struct sfp_bus *sfp_bus_get(struct device_node *np)
|
|
{
|
|
struct sfp_bus *sfp, *new, *found = NULL;
|
|
|
|
new = kzalloc(sizeof(*new), GFP_KERNEL);
|
|
|
|
mutex_lock(&sfp_mutex);
|
|
|
|
list_for_each_entry(sfp, &sfp_buses, node) {
|
|
if (sfp->device_node == np) {
|
|
kref_get(&sfp->kref);
|
|
found = sfp;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found && new) {
|
|
kref_init(&new->kref);
|
|
new->device_node = np;
|
|
list_add(&new->node, &sfp_buses);
|
|
found = new;
|
|
new = NULL;
|
|
}
|
|
|
|
mutex_unlock(&sfp_mutex);
|
|
|
|
kfree(new);
|
|
|
|
return found;
|
|
}
|
|
|
|
static void sfp_bus_release(struct kref *kref) __releases(sfp_mutex)
|
|
{
|
|
struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref);
|
|
|
|
list_del(&bus->node);
|
|
mutex_unlock(&sfp_mutex);
|
|
kfree(bus);
|
|
}
|
|
|
|
static void sfp_bus_put(struct sfp_bus *bus)
|
|
{
|
|
kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
|
|
}
|
|
|
|
static int sfp_register_bus(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = bus->upstream_ops;
|
|
int ret;
|
|
|
|
if (ops) {
|
|
if (ops->link_down)
|
|
ops->link_down(bus->upstream);
|
|
if (ops->connect_phy && bus->phydev) {
|
|
ret = ops->connect_phy(bus->upstream, bus->phydev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
if (bus->started)
|
|
bus->socket_ops->start(bus->sfp);
|
|
bus->registered = true;
|
|
return 0;
|
|
}
|
|
|
|
static void sfp_unregister_bus(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = bus->upstream_ops;
|
|
|
|
if (bus->registered) {
|
|
if (bus->started)
|
|
bus->socket_ops->stop(bus->sfp);
|
|
if (bus->phydev && ops && ops->disconnect_phy)
|
|
ops->disconnect_phy(bus->upstream);
|
|
}
|
|
bus->registered = false;
|
|
}
|
|
|
|
int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)
|
|
{
|
|
if (!bus->registered)
|
|
return -ENOIOCTLCMD;
|
|
return bus->socket_ops->module_info(bus->sfp, modinfo);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_get_module_info);
|
|
|
|
int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,
|
|
u8 *data)
|
|
{
|
|
if (!bus->registered)
|
|
return -ENOIOCTLCMD;
|
|
return bus->socket_ops->module_eeprom(bus->sfp, ee, data);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_get_module_eeprom);
|
|
|
|
void sfp_upstream_start(struct sfp_bus *bus)
|
|
{
|
|
if (bus->registered)
|
|
bus->socket_ops->start(bus->sfp);
|
|
bus->started = true;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_upstream_start);
|
|
|
|
void sfp_upstream_stop(struct sfp_bus *bus)
|
|
{
|
|
if (bus->registered)
|
|
bus->socket_ops->stop(bus->sfp);
|
|
bus->started = false;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_upstream_stop);
|
|
|
|
struct sfp_bus *sfp_register_upstream(struct device_node *np,
|
|
struct net_device *ndev, void *upstream,
|
|
const struct sfp_upstream_ops *ops)
|
|
{
|
|
struct sfp_bus *bus = sfp_bus_get(np);
|
|
int ret = 0;
|
|
|
|
if (bus) {
|
|
rtnl_lock();
|
|
bus->upstream_ops = ops;
|
|
bus->upstream = upstream;
|
|
bus->netdev = ndev;
|
|
|
|
if (bus->sfp)
|
|
ret = sfp_register_bus(bus);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
if (ret) {
|
|
sfp_bus_put(bus);
|
|
bus = NULL;
|
|
}
|
|
|
|
return bus;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_register_upstream);
|
|
|
|
void sfp_unregister_upstream(struct sfp_bus *bus)
|
|
{
|
|
rtnl_lock();
|
|
sfp_unregister_bus(bus);
|
|
bus->upstream = NULL;
|
|
bus->netdev = NULL;
|
|
rtnl_unlock();
|
|
|
|
sfp_bus_put(bus);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_unregister_upstream);
|
|
|
|
/* Socket driver entry points */
|
|
int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
int ret = 0;
|
|
|
|
if (ops && ops->connect_phy)
|
|
ret = ops->connect_phy(bus->upstream, phydev);
|
|
|
|
if (ret == 0)
|
|
bus->phydev = phydev;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_add_phy);
|
|
|
|
void sfp_remove_phy(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->disconnect_phy)
|
|
ops->disconnect_phy(bus->upstream);
|
|
bus->phydev = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_remove_phy);
|
|
|
|
void sfp_link_up(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->link_up)
|
|
ops->link_up(bus->upstream);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_link_up);
|
|
|
|
void sfp_link_down(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->link_down)
|
|
ops->link_down(bus->upstream);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_link_down);
|
|
|
|
int sfp_module_insert(struct sfp_bus *bus, const struct sfp_eeprom_id *id)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
int ret = 0;
|
|
|
|
if (ops && ops->module_insert)
|
|
ret = ops->module_insert(bus->upstream, id);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_module_insert);
|
|
|
|
void sfp_module_remove(struct sfp_bus *bus)
|
|
{
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
|
|
|
if (ops && ops->module_remove)
|
|
ops->module_remove(bus->upstream);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_module_remove);
|
|
|
|
struct sfp_bus *sfp_register_socket(struct device *dev, struct sfp *sfp,
|
|
const struct sfp_socket_ops *ops)
|
|
{
|
|
struct sfp_bus *bus = sfp_bus_get(dev->of_node);
|
|
int ret = 0;
|
|
|
|
if (bus) {
|
|
rtnl_lock();
|
|
bus->sfp_dev = dev;
|
|
bus->sfp = sfp;
|
|
bus->socket_ops = ops;
|
|
|
|
if (bus->netdev)
|
|
ret = sfp_register_bus(bus);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
if (ret) {
|
|
sfp_bus_put(bus);
|
|
bus = NULL;
|
|
}
|
|
|
|
return bus;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_register_socket);
|
|
|
|
void sfp_unregister_socket(struct sfp_bus *bus)
|
|
{
|
|
rtnl_lock();
|
|
sfp_unregister_bus(bus);
|
|
bus->sfp_dev = NULL;
|
|
bus->sfp = NULL;
|
|
bus->socket_ops = NULL;
|
|
rtnl_unlock();
|
|
|
|
sfp_bus_put(bus);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sfp_unregister_socket);
|