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#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)
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