--- zzzz-none-000/linux-5.4.213/drivers/net/phy/sfp-bus.c 2022-09-15 10:04:56.000000000 +0000 +++ miami-7690-761/linux-5.4.213/drivers/net/phy/sfp-bus.c 2024-05-29 11:19:55.000000000 +0000 @@ -4,17 +4,12 @@ #include #include #include +#include #include #include #include "sfp.h" -struct sfp_quirk { - const char *vendor; - const char *part; - void (*modes)(const struct sfp_eeprom_id *id, unsigned long *modes); -}; - /** * struct sfp_bus - internal representation of a sfp bus */ @@ -27,7 +22,6 @@ 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; @@ -37,71 +31,6 @@ bool started; }; -static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id, - unsigned long *modes) -{ - phylink_set(modes, 2500baseX_Full); -} - -static const struct sfp_quirk sfp_quirks[] = { - { - // Alcatel Lucent G-010S-P can operate at 2500base-X, but - // incorrectly report 2500MBd NRZ in their EEPROM - .vendor = "ALCATELLUCENT", - .part = "G010SP", - .modes = sfp_quirk_2500basex, - }, { - // Alcatel Lucent G-010S-A can operate at 2500base-X, but - // report 3.2GBd NRZ in their EEPROM - .vendor = "ALCATELLUCENT", - .part = "3FE46541AA", - .modes = sfp_quirk_2500basex, - }, { - // Huawei MA5671A can operate at 2500base-X, but report 1.2GBd - // NRZ in their EEPROM - .vendor = "HUAWEI", - .part = "MA5671A", - .modes = sfp_quirk_2500basex, - }, -}; - -static size_t sfp_strlen(const char *str, size_t maxlen) -{ - size_t size, i; - - /* Trailing characters should be filled with space chars */ - for (i = 0, size = 0; i < maxlen; i++) - if (str[i] != ' ') - size = i + 1; - - return size; -} - -static bool sfp_match(const char *qs, const char *str, size_t len) -{ - if (!qs) - return true; - if (strlen(qs) != len) - return false; - return !strncmp(qs, str, len); -} - -static const struct sfp_quirk *sfp_lookup_quirk(const struct sfp_eeprom_id *id) -{ - const struct sfp_quirk *q; - unsigned int i; - size_t vs, ps; - - vs = sfp_strlen(id->base.vendor_name, ARRAY_SIZE(id->base.vendor_name)); - ps = sfp_strlen(id->base.vendor_pn, ARRAY_SIZE(id->base.vendor_pn)); - - for (i = 0, q = sfp_quirks; i < ARRAY_SIZE(sfp_quirks); i++, q++) - if (sfp_match(q->vendor, id->base.vendor_name, vs) && - sfp_match(q->part, id->base.vendor_pn, ps)) - return q; - - return NULL; -} /** * 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 @@ -123,35 +52,35 @@ /* 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: + 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 SFP_CONNECTOR_RJ45: + case SFF8024_CONNECTOR_RJ45: port = PORT_TP; break; - case SFP_CONNECTOR_COPPER_PIGTAIL: + case SFF8024_CONNECTOR_COPPER_PIGTAIL: port = PORT_DA; break; - case SFP_CONNECTOR_UNSPEC: + case SFF8024_CONNECTOR_UNSPEC: if (id->base.e1000_base_t) { 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_NOSEPARATE: - case SFP_CONNECTOR_MXC_2X16: + case SFF8024_CONNECTOR_SG: /* guess */ + case SFF8024_CONNECTOR_HSSDC_II: + case SFF8024_CONNECTOR_NOSEPARATE: + case SFF8024_CONNECTOR_MXC_2X16: port = PORT_OTHER; break; default: @@ -178,6 +107,33 @@ 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 @@ -260,22 +216,33 @@ } switch (id->base.extended_cc) { - case 0x00: /* Unspecified */ + case SFF8024_ECC_UNSPEC: break; - case 0x02: /* 100Gbase-SR4 or 25Gbase-SR */ + case SFF8024_ECC_100GBASE_SR4_25GBASE_SR: phylink_set(modes, 100000baseSR4_Full); phylink_set(modes, 25000baseSR_Full); break; - case 0x03: /* 100Gbase-LR4 or 25Gbase-LR */ - case 0x04: /* 100Gbase-ER4 or 25Gbase-ER */ + case SFF8024_ECC_100GBASE_LR4_25GBASE_LR: + case SFF8024_ECC_100GBASE_ER4_25GBASE_ER: phylink_set(modes, 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 */ + 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); break; + case SFF8024_ECC_10GBASE_T_SFI: + case SFF8024_ECC_10GBASE_T_SR: + phylink_set(modes, 10000baseT_Full); + break; + case SFF8024_ECC_5GBASE_T: + phylink_set(modes, 5000baseT_Full); + break; + case SFF8024_ECC_2_5GBASE_T: + phylink_set(modes, 2500baseT_Full); + break; default: dev_warn(bus->sfp_dev, "Unknown/unsupported extended compliance code: 0x%02x\n", @@ -300,14 +267,11 @@ */ if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS)) { /* If the encoding and bit rate allows 1000baseX */ - if (id->base.encoding == SFP_ENCODING_8B10B && br_nom && + if (id->base.encoding == SFF8024_ENCODING_8B10B && br_nom && br_min <= 1300 && br_max >= 1200) phylink_set(modes, 1000baseX_Full); } - if (bus->sfp_quirk) - bus->sfp_quirk->modes(id, modes); - bitmap_or(support, support, modes, __ETHTOOL_LINK_MODE_MASK_NBITS); phylink_set(support, Autoneg); @@ -319,31 +283,27 @@ /** * sfp_select_interface() - Select appropriate phy_interface_t mode * @bus: a pointer to the &struct sfp_bus structure for the sfp module - * @id: a pointer to the module's &struct sfp_eeprom_id * @link_modes: ethtool link modes mask * - * Derive the phy_interface_t mode for the information found in the - * module's identifying EEPROM and the link modes mask. There is no - * standard or defined way to derive this information, so we decide - * based upon the link mode 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, - const struct sfp_eeprom_id *id, unsigned long *link_modes) { 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, 10000baseER_Full) || + phylink_test(link_modes, 10000baseT_Full)) return PHY_INTERFACE_MODE_10GKR; if (phylink_test(link_modes, 2500baseX_Full)) return PHY_INTERFACE_MODE_2500BASEX; - if (id->base.e1000_base_t || - id->base.e100_base_lx || - id->base.e100_base_fx) + 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)) @@ -403,10 +363,19 @@ kfree(bus); } -static void sfp_bus_put(struct sfp_bus *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) { - kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex); + 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) { @@ -422,11 +391,11 @@ 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); - bus->registered = true; return 0; } @@ -520,64 +489,111 @@ } /** - * sfp_register_upstream() - Register the neighbouring device - * @fwnode: firmware node for the SFP bus + * 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(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); + + 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 * - * Register the upstream device (eg, PHY) with the SFP bus. MAC drivers - * should use phylink, which will call this function for them. Returns - * a pointer to the allocated &struct sfp_bus. - * - * On error, returns %NULL. + * 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. */ -struct sfp_bus *sfp_register_upstream(struct fwnode_handle *fwnode, - void *upstream, - const struct sfp_upstream_ops *ops) +int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream, + const struct sfp_upstream_ops *ops) { - struct sfp_bus *bus = sfp_bus_get(fwnode); - int ret = 0; + int ret; - if (bus) { - rtnl_lock(); - bus->upstream_ops = ops; - bus->upstream = upstream; + /* If no bus, return success */ + if (!bus) + return 0; - if (bus->sfp) { - ret = sfp_register_bus(bus); - if (ret) - sfp_upstream_clear(bus); - } - rtnl_unlock(); + 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) { + if (ret) sfp_bus_put(bus); - bus = NULL; - } - return bus; + return ret; } -EXPORT_SYMBOL_GPL(sfp_register_upstream); +EXPORT_SYMBOL_GPL(sfp_bus_add_upstream); /** - * sfp_unregister_upstream() - Unregister sfp bus + * sfp_bus_del_upstream() - Delete a sfp bus * @bus: a pointer to the &struct sfp_bus structure for the sfp module * - * Unregister a previously registered upstream connection for the SFP - * module. @bus is returned from sfp_register_upstream(). + * Delete a previously registered upstream connection for the SFP + * module. @bus should have been added by sfp_bus_add_upstream(). */ -void sfp_unregister_upstream(struct sfp_bus *bus) +void sfp_bus_del_upstream(struct sfp_bus *bus) { - rtnl_lock(); - if (bus->sfp) - sfp_unregister_bus(bus); - sfp_upstream_clear(bus); - rtnl_unlock(); + if (bus) { + rtnl_lock(); + if (bus->sfp) + sfp_unregister_bus(bus); + sfp_upstream_clear(bus); + rtnl_unlock(); - sfp_bus_put(bus); + sfp_bus_put(bus); + } } -EXPORT_SYMBOL_GPL(sfp_unregister_upstream); +EXPORT_SYMBOL_GPL(sfp_bus_del_upstream); /* Socket driver entry points */ int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev) @@ -628,8 +644,6 @@ const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus); int ret = 0; - bus->sfp_quirk = sfp_lookup_quirk(id); - if (ops && ops->module_insert) ret = ops->module_insert(bus->upstream, id); @@ -643,11 +657,30 @@ 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;