diff options
Diffstat (limited to 'drivers/net/phy/sfp-bus.c')
| -rw-r--r-- | drivers/net/phy/sfp-bus.c | 861 |
1 files changed, 861 insertions, 0 deletions
diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c new file mode 100644 index 0000000000..208a9393c2 --- /dev/null +++ b/drivers/net/phy/sfp-bus.c @@ -0,0 +1,861 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <linux/export.h> +#include <linux/kref.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/phylink.h> +#include <linux/property.h> +#include <linux/rtnetlink.h> +#include <linux/slab.h> + +#include "sfp.h" + +/** + * struct sfp_bus - internal representation of a sfp bus + */ +struct sfp_bus { + /* private: */ + struct kref kref; + struct list_head node; + const struct fwnode_handle *fwnode; + + const struct sfp_socket_ops *socket_ops; + struct device *sfp_dev; + struct sfp *sfp; + const struct sfp_quirk *sfp_quirk; + + const struct sfp_upstream_ops *upstream_ops; + void *upstream; + struct phy_device *phydev; + + bool registered; + bool started; +}; + +/** + * sfp_parse_port() - Parse the EEPROM base ID, setting the port type + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @id: a pointer to the module's &struct sfp_eeprom_id + * @support: optional pointer to an array of unsigned long for the + * ethtool support mask + * + * Parse the EEPROM identification given in @id, and return one of + * %PORT_TP, %PORT_FIBRE or %PORT_OTHER. If @support is non-%NULL, + * also set the ethtool %ETHTOOL_LINK_MODE_xxx_BIT corresponding with + * the connector type. + * + * If the port type is not known, returns %PORT_OTHER. + */ +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 SFF8024_CONNECTOR_SC: + case SFF8024_CONNECTOR_FIBERJACK: + case SFF8024_CONNECTOR_LC: + case SFF8024_CONNECTOR_MT_RJ: + case SFF8024_CONNECTOR_MU: + case SFF8024_CONNECTOR_OPTICAL_PIGTAIL: + case SFF8024_CONNECTOR_MPO_1X12: + case SFF8024_CONNECTOR_MPO_2X16: + port = PORT_FIBRE; + break; + + case SFF8024_CONNECTOR_RJ45: + port = PORT_TP; + break; + + case SFF8024_CONNECTOR_COPPER_PIGTAIL: + port = PORT_DA; + break; + + case SFF8024_CONNECTOR_UNSPEC: + if (id->base.e1000_base_t) { + port = PORT_TP; + break; + } + fallthrough; + case SFF8024_CONNECTOR_SG: /* guess */ + case SFF8024_CONNECTOR_HSSDC_II: + case SFF8024_CONNECTOR_NOSEPARATE: + case SFF8024_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; + } + + if (support) { + switch (port) { + case PORT_FIBRE: + phylink_set(support, FIBRE); + break; + + case PORT_TP: + phylink_set(support, TP); + break; + } + } + + return port; +} +EXPORT_SYMBOL_GPL(sfp_parse_port); + +/** + * sfp_may_have_phy() - indicate whether the module may have a PHY + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @id: a pointer to the module's &struct sfp_eeprom_id + * + * Parse the EEPROM identification given in @id, and return whether + * this module may have a PHY. + */ +bool sfp_may_have_phy(struct sfp_bus *bus, const struct sfp_eeprom_id *id) +{ + if (id->base.e1000_base_t) + return true; + + if (id->base.phys_id != SFF8024_ID_DWDM_SFP) { + switch (id->base.extended_cc) { + case SFF8024_ECC_10GBASE_T_SFI: + case SFF8024_ECC_10GBASE_T_SR: + case SFF8024_ECC_5GBASE_T: + case SFF8024_ECC_2_5GBASE_T: + return true; + } + } + + return false; +} +EXPORT_SYMBOL_GPL(sfp_may_have_phy); + +/** + * sfp_parse_support() - Parse the eeprom id for supported link modes + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @id: a pointer to the module's &struct sfp_eeprom_id + * @support: pointer to an array of unsigned long for the ethtool support mask + * @interfaces: pointer to an array of unsigned long for phy interface modes + * mask + * + * Parse the EEPROM identification information and derive the supported + * ethtool link modes for the module. + */ +void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id, + unsigned long *support, unsigned long *interfaces) +{ + unsigned int br_min, br_nom, br_max; + __ETHTOOL_DECLARE_LINK_MODE_MASK(modes) = { 0, }; + + phylink_set(modes, Autoneg); + phylink_set(modes, Pause); + phylink_set(modes, Asym_Pause); + + /* Decode the bitrate information to MBd */ + br_min = br_nom = br_max = 0; + if (id->base.br_nominal) { + if (id->base.br_nominal != 255) { + br_nom = id->base.br_nominal * 100; + br_min = br_nom - id->base.br_nominal * id->ext.br_min; + br_max = br_nom + id->base.br_nominal * id->ext.br_max; + } else if (id->ext.br_max) { + br_nom = 250 * id->ext.br_max; + br_max = br_nom + br_nom * id->ext.br_min / 100; + br_min = br_nom - br_nom * id->ext.br_min / 100; + } + + /* When using passive cables, in case neither BR,min nor BR,max + * are specified, set br_min to 0 as the nominal value is then + * used as the maximum. + */ + if (br_min == br_max && id->base.sfp_ct_passive) + br_min = 0; + } + + /* Set ethtool support from the compliance fields. */ + if (id->base.e10g_base_sr) { + phylink_set(modes, 10000baseSR_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + } + if (id->base.e10g_base_lr) { + phylink_set(modes, 10000baseLR_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + } + if (id->base.e10g_base_lrm) { + phylink_set(modes, 10000baseLRM_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + } + if (id->base.e10g_base_er) { + phylink_set(modes, 10000baseER_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + } + if (id->base.e1000_base_sx || + id->base.e1000_base_lx || + id->base.e1000_base_cx) { + phylink_set(modes, 1000baseX_Full); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, interfaces); + } + if (id->base.e1000_base_t) { + phylink_set(modes, 1000baseT_Half); + phylink_set(modes, 1000baseT_Full); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, interfaces); + __set_bit(PHY_INTERFACE_MODE_SGMII, interfaces); + } + + /* 1000Base-PX or 1000Base-BX10 */ + if ((id->base.e_base_px || id->base.e_base_bx10) && + br_min <= 1300 && br_max >= 1200) { + phylink_set(modes, 1000baseX_Full); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, interfaces); + } + + /* 100Base-FX, 100Base-LX, 100Base-PX, 100Base-BX10 */ + if (id->base.e100_base_fx || id->base.e100_base_lx) { + phylink_set(modes, 100baseFX_Full); + __set_bit(PHY_INTERFACE_MODE_100BASEX, interfaces); + } + if ((id->base.e_base_px || id->base.e_base_bx10) && br_nom == 100) { + phylink_set(modes, 100baseFX_Full); + __set_bit(PHY_INTERFACE_MODE_100BASEX, interfaces); + } + + /* For active or passive cables, select the link modes + * based on the bit rates and the cable compliance bytes. + */ + if ((id->base.sfp_ct_passive || id->base.sfp_ct_active) && br_nom) { + /* This may look odd, but some manufacturers use 12000MBd */ + if (br_min <= 12000 && br_max >= 10300) { + phylink_set(modes, 10000baseCR_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + } + if (br_min <= 3200 && br_max >= 3100) { + phylink_set(modes, 2500baseX_Full); + __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); + } + if (br_min <= 1300 && br_max >= 1200) { + phylink_set(modes, 1000baseX_Full); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, interfaces); + } + } + if (id->base.sfp_ct_passive) { + if (id->base.passive.sff8431_app_e) { + phylink_set(modes, 10000baseCR_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + } + } + if (id->base.sfp_ct_active) { + if (id->base.active.sff8431_app_e || + id->base.active.sff8431_lim) { + phylink_set(modes, 10000baseCR_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + } + } + + switch (id->base.extended_cc) { + case SFF8024_ECC_UNSPEC: + break; + case SFF8024_ECC_100G_25GAUI_C2M_AOC: + if (br_min <= 28000 && br_max >= 25000) { + /* 25GBASE-R, possibly with FEC */ + __set_bit(PHY_INTERFACE_MODE_25GBASER, interfaces); + /* There is currently no link mode for 25000base + * with unspecified range, reuse SR. + */ + phylink_set(modes, 25000baseSR_Full); + } + break; + case SFF8024_ECC_100GBASE_SR4_25GBASE_SR: + phylink_set(modes, 100000baseSR4_Full); + phylink_set(modes, 25000baseSR_Full); + __set_bit(PHY_INTERFACE_MODE_25GBASER, interfaces); + break; + case SFF8024_ECC_100GBASE_LR4_25GBASE_LR: + case SFF8024_ECC_100GBASE_ER4_25GBASE_ER: + phylink_set(modes, 100000baseLR4_ER4_Full); + break; + case SFF8024_ECC_100GBASE_CR4: + phylink_set(modes, 100000baseCR4_Full); + fallthrough; + case SFF8024_ECC_25GBASE_CR_S: + case SFF8024_ECC_25GBASE_CR_N: + phylink_set(modes, 25000baseCR_Full); + __set_bit(PHY_INTERFACE_MODE_25GBASER, interfaces); + break; + case SFF8024_ECC_10GBASE_T_SFI: + case SFF8024_ECC_10GBASE_T_SR: + phylink_set(modes, 10000baseT_Full); + __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces); + break; + case SFF8024_ECC_5GBASE_T: + phylink_set(modes, 5000baseT_Full); + __set_bit(PHY_INTERFACE_MODE_5GBASER, interfaces); + break; + case SFF8024_ECC_2_5GBASE_T: + phylink_set(modes, 2500baseT_Full); + __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); + 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(modes, 2500baseX_Full); + __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); + } + if (id->base.br_nominal >= 12) { + phylink_set(modes, 1000baseX_Full); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, interfaces); + } + } + + /* If we haven't discovered any modes that this module supports, try + * the bitrate to determine supported modes. Some BiDi modules (eg, + * 1310nm/1550nm) are not 1000BASE-BX compliant due to the differing + * wavelengths, so do not set any transceiver bits. + * + * Do the same for modules supporting 2500BASE-X. Note that some + * modules use 2500Mbaud rather than 3100 or 3200Mbaud for + * 2500BASE-X, so we allow some slack here. + */ + if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS) && br_nom) { + if (br_min <= 1300 && br_max >= 1200) { + phylink_set(modes, 1000baseX_Full); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, interfaces); + } + if (br_min <= 3200 && br_max >= 2500) { + phylink_set(modes, 2500baseX_Full); + __set_bit(PHY_INTERFACE_MODE_2500BASEX, interfaces); + } + } + + if (bus->sfp_quirk && bus->sfp_quirk->modes) + bus->sfp_quirk->modes(id, modes, interfaces); + + linkmode_or(support, support, modes); +} +EXPORT_SYMBOL_GPL(sfp_parse_support); + +/** + * sfp_select_interface() - Select appropriate phy_interface_t mode + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @link_modes: ethtool link modes mask + * + * Derive the phy_interface_t mode for the SFP module from the link + * modes mask. + */ +phy_interface_t sfp_select_interface(struct sfp_bus *bus, + unsigned long *link_modes) +{ + if (phylink_test(link_modes, 25000baseCR_Full) || + phylink_test(link_modes, 25000baseKR_Full) || + phylink_test(link_modes, 25000baseSR_Full)) + return PHY_INTERFACE_MODE_25GBASER; + + if (phylink_test(link_modes, 10000baseCR_Full) || + phylink_test(link_modes, 10000baseSR_Full) || + phylink_test(link_modes, 10000baseLR_Full) || + phylink_test(link_modes, 10000baseLRM_Full) || + phylink_test(link_modes, 10000baseER_Full) || + phylink_test(link_modes, 10000baseT_Full)) + return PHY_INTERFACE_MODE_10GBASER; + + if (phylink_test(link_modes, 5000baseT_Full)) + return PHY_INTERFACE_MODE_5GBASER; + + if (phylink_test(link_modes, 2500baseX_Full)) + return PHY_INTERFACE_MODE_2500BASEX; + + if (phylink_test(link_modes, 1000baseT_Half) || + phylink_test(link_modes, 1000baseT_Full)) + return PHY_INTERFACE_MODE_SGMII; + + if (phylink_test(link_modes, 1000baseX_Full)) + return PHY_INTERFACE_MODE_1000BASEX; + + if (phylink_test(link_modes, 100baseFX_Full)) + return PHY_INTERFACE_MODE_100BASEX; + + dev_warn(bus->sfp_dev, "Unable to ascertain link mode\n"); + + return PHY_INTERFACE_MODE_NA; +} +EXPORT_SYMBOL_GPL(sfp_select_interface); + +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(const struct fwnode_handle *fwnode) +{ + 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->fwnode == fwnode) { + kref_get(&sfp->kref); + found = sfp; + break; + } + } + + if (!found && new) { + kref_init(&new->kref); + new->fwnode = fwnode; + 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) +{ + struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref); + + list_del(&bus->node); + mutex_unlock(&sfp_mutex); + kfree(bus); +} + +/** + * sfp_bus_put() - put a reference on the &struct sfp_bus + * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode() + * + * Put a reference on the &struct sfp_bus and free the underlying structure + * if this was the last reference. + */ +void sfp_bus_put(struct sfp_bus *bus) +{ + if (bus) + kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex); +} +EXPORT_SYMBOL_GPL(sfp_bus_put); + +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; + } + } + bus->registered = true; + bus->socket_ops->attach(bus->sfp); + if (bus->started) + bus->socket_ops->start(bus->sfp); + bus->upstream_ops->attach(bus->upstream, bus); + return 0; +} + +static void sfp_unregister_bus(struct sfp_bus *bus) +{ + const struct sfp_upstream_ops *ops = bus->upstream_ops; + + if (bus->registered) { + bus->upstream_ops->detach(bus->upstream, bus); + if (bus->started) + bus->socket_ops->stop(bus->sfp); + bus->socket_ops->detach(bus->sfp); + if (bus->phydev && ops && ops->disconnect_phy) + ops->disconnect_phy(bus->upstream); + } + bus->registered = false; +} + +/** + * sfp_get_module_info() - Get the ethtool_modinfo for a SFP module + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @modinfo: a &struct ethtool_modinfo + * + * Fill in the type and eeprom_len parameters in @modinfo for a module on + * the sfp bus specified by @bus. + * + * Returns 0 on success or a negative errno number. + */ +int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo) +{ + return bus->socket_ops->module_info(bus->sfp, modinfo); +} +EXPORT_SYMBOL_GPL(sfp_get_module_info); + +/** + * sfp_get_module_eeprom() - Read the SFP module EEPROM + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @ee: a &struct ethtool_eeprom + * @data: buffer to contain the EEPROM data (must be at least @ee->len bytes) + * + * Read the EEPROM as specified by the supplied @ee. See the documentation + * for &struct ethtool_eeprom for the region to be read. + * + * Returns 0 on success or a negative errno number. + */ +int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee, + u8 *data) +{ + return bus->socket_ops->module_eeprom(bus->sfp, ee, data); +} +EXPORT_SYMBOL_GPL(sfp_get_module_eeprom); + +/** + * sfp_get_module_eeprom_by_page() - Read a page from the SFP module EEPROM + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @page: a &struct ethtool_module_eeprom + * @extack: extack for reporting problems + * + * Read an EEPROM page as specified by the supplied @page. See the + * documentation for &struct ethtool_module_eeprom for the page to be read. + * + * Returns 0 on success or a negative errno number. More error + * information might be provided via extack + */ +int sfp_get_module_eeprom_by_page(struct sfp_bus *bus, + const struct ethtool_module_eeprom *page, + struct netlink_ext_ack *extack) +{ + return bus->socket_ops->module_eeprom_by_page(bus->sfp, page, extack); +} +EXPORT_SYMBOL_GPL(sfp_get_module_eeprom_by_page); + +/** + * sfp_upstream_start() - Inform the SFP that the network device is up + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * + * Inform the SFP socket that the network device is now up, so that the + * module can be enabled by allowing TX_DISABLE to be deasserted. This + * should be called from the network device driver's &struct net_device_ops + * ndo_open() method. + */ +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); + +/** + * sfp_upstream_stop() - Inform the SFP that the network device is down + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * + * Inform the SFP socket that the network device is now up, so that the + * module can be disabled by asserting TX_DISABLE, disabling the laser + * in optical modules. This should be called from the network device + * driver's &struct net_device_ops ndo_stop() method. + */ +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); + +static void sfp_upstream_clear(struct sfp_bus *bus) +{ + bus->upstream_ops = NULL; + bus->upstream = NULL; +} + +/** + * sfp_upstream_set_signal_rate() - set data signalling rate + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * @rate_kbd: signalling rate in units of 1000 baud + * + * Configure the rate select settings on the SFP module for the signalling + * rate (not the same as the data rate). + * + * Locks that may be held: + * Phylink's state_mutex + * rtnl lock + * SFP's sm_mutex + */ +void sfp_upstream_set_signal_rate(struct sfp_bus *bus, unsigned int rate_kbd) +{ + if (bus->registered) + bus->socket_ops->set_signal_rate(bus->sfp, rate_kbd); +} +EXPORT_SYMBOL_GPL(sfp_upstream_set_signal_rate); + +/** + * sfp_bus_find_fwnode() - parse and locate the SFP bus from fwnode + * @fwnode: firmware node for the parent device (MAC or PHY) + * + * Parse the parent device's firmware node for a SFP bus, and locate + * the sfp_bus structure, incrementing its reference count. This must + * be put via sfp_bus_put() when done. + * + * Returns: + * - on success, a pointer to the sfp_bus structure, + * - %NULL if no SFP is specified, + * - on failure, an error pointer value: + * + * - corresponding to the errors detailed for + * fwnode_property_get_reference_args(). + * - %-ENOMEM if we failed to allocate the bus. + * - an error from the upstream's connect_phy() method. + */ +struct sfp_bus *sfp_bus_find_fwnode(const struct fwnode_handle *fwnode) +{ + struct fwnode_reference_args ref; + struct sfp_bus *bus; + int ret; + + ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL, + 0, 0, &ref); + if (ret == -ENOENT) + return NULL; + else if (ret < 0) + return ERR_PTR(ret); + + if (!fwnode_device_is_available(ref.fwnode)) { + fwnode_handle_put(ref.fwnode); + return NULL; + } + + bus = sfp_bus_get(ref.fwnode); + fwnode_handle_put(ref.fwnode); + if (!bus) + return ERR_PTR(-ENOMEM); + + return bus; +} +EXPORT_SYMBOL_GPL(sfp_bus_find_fwnode); + +/** + * sfp_bus_add_upstream() - parse and register the neighbouring device + * @bus: the &struct sfp_bus found via sfp_bus_find_fwnode() + * @upstream: the upstream private data + * @ops: the upstream's &struct sfp_upstream_ops + * + * Add upstream driver for the SFP bus, and if the bus is complete, register + * the SFP bus using sfp_register_upstream(). This takes a reference on the + * bus, so it is safe to put the bus after this call. + * + * Returns: + * - on success, a pointer to the sfp_bus structure, + * - %NULL if no SFP is specified, + * - on failure, an error pointer value: + * + * - corresponding to the errors detailed for + * fwnode_property_get_reference_args(). + * - %-ENOMEM if we failed to allocate the bus. + * - an error from the upstream's connect_phy() method. + */ +int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream, + const struct sfp_upstream_ops *ops) +{ + int ret; + + /* If no bus, return success */ + if (!bus) + return 0; + + rtnl_lock(); + kref_get(&bus->kref); + bus->upstream_ops = ops; + bus->upstream = upstream; + + if (bus->sfp) { + ret = sfp_register_bus(bus); + if (ret) + sfp_upstream_clear(bus); + } else { + ret = 0; + } + rtnl_unlock(); + + if (ret) + sfp_bus_put(bus); + + return ret; +} +EXPORT_SYMBOL_GPL(sfp_bus_add_upstream); + +/** + * sfp_bus_del_upstream() - Delete a sfp bus + * @bus: a pointer to the &struct sfp_bus structure for the sfp module + * + * Delete a previously registered upstream connection for the SFP + * module. @bus should have been added by sfp_bus_add_upstream(). + */ +void sfp_bus_del_upstream(struct sfp_bus *bus) +{ + if (bus) { + rtnl_lock(); + if (bus->sfp) + sfp_unregister_bus(bus); + sfp_upstream_clear(bus); + rtnl_unlock(); + + sfp_bus_put(bus); + } +} +EXPORT_SYMBOL_GPL(sfp_bus_del_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_quirk *quirk) +{ + const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus); + int ret = 0; + + bus->sfp_quirk = quirk; + + 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); + + bus->sfp_quirk = NULL; +} +EXPORT_SYMBOL_GPL(sfp_module_remove); + +int sfp_module_start(struct sfp_bus *bus) +{ + const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus); + int ret = 0; + + if (ops && ops->module_start) + ret = ops->module_start(bus->upstream); + + return ret; +} +EXPORT_SYMBOL_GPL(sfp_module_start); + +void sfp_module_stop(struct sfp_bus *bus) +{ + const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus); + + if (ops && ops->module_stop) + ops->module_stop(bus->upstream); +} +EXPORT_SYMBOL_GPL(sfp_module_stop); + +static void sfp_socket_clear(struct sfp_bus *bus) +{ + bus->sfp_dev = NULL; + bus->sfp = NULL; + bus->socket_ops = NULL; +} + +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->fwnode); + int ret = 0; + + if (bus) { + rtnl_lock(); + bus->sfp_dev = dev; + bus->sfp = sfp; + bus->socket_ops = ops; + + if (bus->upstream_ops) { + ret = sfp_register_bus(bus); + if (ret) + sfp_socket_clear(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(); + if (bus->upstream_ops) + sfp_unregister_bus(bus); + sfp_socket_clear(bus); + rtnl_unlock(); + + sfp_bus_put(bus); +} +EXPORT_SYMBOL_GPL(sfp_unregister_socket); |