// SPDX-License-Identifier: GPL-2.0-or-later #include #include #include #include "phy-caps.h" static struct link_capabilities link_caps[__LINK_CAPA_MAX] __ro_after_init = { { SPEED_10, DUPLEX_HALF, {0} }, /* LINK_CAPA_10HD */ { SPEED_10, DUPLEX_FULL, {0} }, /* LINK_CAPA_10FD */ { SPEED_100, DUPLEX_HALF, {0} }, /* LINK_CAPA_100HD */ { SPEED_100, DUPLEX_FULL, {0} }, /* LINK_CAPA_100FD */ { SPEED_1000, DUPLEX_HALF, {0} }, /* LINK_CAPA_1000HD */ { SPEED_1000, DUPLEX_FULL, {0} }, /* LINK_CAPA_1000FD */ { SPEED_2500, DUPLEX_FULL, {0} }, /* LINK_CAPA_2500FD */ { SPEED_5000, DUPLEX_FULL, {0} }, /* LINK_CAPA_5000FD */ { SPEED_10000, DUPLEX_FULL, {0} }, /* LINK_CAPA_10000FD */ { SPEED_20000, DUPLEX_FULL, {0} }, /* LINK_CAPA_20000FD */ { SPEED_25000, DUPLEX_FULL, {0} }, /* LINK_CAPA_25000FD */ { SPEED_40000, DUPLEX_FULL, {0} }, /* LINK_CAPA_40000FD */ { SPEED_50000, DUPLEX_FULL, {0} }, /* LINK_CAPA_50000FD */ { SPEED_56000, DUPLEX_FULL, {0} }, /* LINK_CAPA_56000FD */ { SPEED_100000, DUPLEX_FULL, {0} }, /* LINK_CAPA_100000FD */ { SPEED_200000, DUPLEX_FULL, {0} }, /* LINK_CAPA_200000FD */ { SPEED_400000, DUPLEX_FULL, {0} }, /* LINK_CAPA_400000FD */ { SPEED_800000, DUPLEX_FULL, {0} }, /* LINK_CAPA_800000FD */ }; static int speed_duplex_to_capa(int speed, unsigned int duplex) { if (duplex == DUPLEX_UNKNOWN || (speed > SPEED_1000 && duplex != DUPLEX_FULL)) return -EINVAL; switch (speed) { case SPEED_10: return duplex == DUPLEX_FULL ? LINK_CAPA_10FD : LINK_CAPA_10HD; case SPEED_100: return duplex == DUPLEX_FULL ? LINK_CAPA_100FD : LINK_CAPA_100HD; case SPEED_1000: return duplex == DUPLEX_FULL ? LINK_CAPA_1000FD : LINK_CAPA_1000HD; case SPEED_2500: return LINK_CAPA_2500FD; case SPEED_5000: return LINK_CAPA_5000FD; case SPEED_10000: return LINK_CAPA_10000FD; case SPEED_20000: return LINK_CAPA_20000FD; case SPEED_25000: return LINK_CAPA_25000FD; case SPEED_40000: return LINK_CAPA_40000FD; case SPEED_50000: return LINK_CAPA_50000FD; case SPEED_56000: return LINK_CAPA_56000FD; case SPEED_100000: return LINK_CAPA_100000FD; case SPEED_200000: return LINK_CAPA_200000FD; case SPEED_400000: return LINK_CAPA_400000FD; case SPEED_800000: return LINK_CAPA_800000FD; } return -EINVAL; } #define for_each_link_caps_asc_speed(cap) \ for (cap = link_caps; cap < &link_caps[__LINK_CAPA_MAX]; cap++) #define for_each_link_caps_desc_speed(cap) \ for (cap = &link_caps[__LINK_CAPA_MAX - 1]; cap >= link_caps; cap--) /** * phy_caps_init() - Initializes the link_caps array from the link_mode_params. * * Returns: 0 if phy caps init was successful, -EINVAL if we found an * unexpected linkmode setting that requires LINK_CAPS update. * */ int phy_caps_init(void) { const struct link_mode_info *linkmode; int i, capa; /* Fill the caps array from net/ethtool/common.c */ for (i = 0; i < __ETHTOOL_LINK_MODE_MASK_NBITS; i++) { linkmode = &link_mode_params[i]; capa = speed_duplex_to_capa(linkmode->speed, linkmode->duplex); if (capa < 0) { if (linkmode->speed != SPEED_UNKNOWN) { pr_err("Unknown speed %d, please update LINK_CAPS\n", linkmode->speed); return -EINVAL; } continue; } __set_bit(i, link_caps[capa].linkmodes); } return 0; } /** * phy_caps_speeds() - Fill an array of supported SPEED_* values for given modes * @speeds: Output array to store the speeds list into * @size: Size of the output array * @linkmodes: Linkmodes to get the speeds from * * Fills the speeds array with all possible speeds that can be achieved with * the specified linkmodes. * * Returns: The number of speeds filled into the array. If the input array isn't * big enough to store all speeds, fill it as much as possible. */ size_t phy_caps_speeds(unsigned int *speeds, size_t size, unsigned long *linkmodes) { struct link_capabilities *lcap; size_t count = 0; for_each_link_caps_asc_speed(lcap) { if (linkmode_intersects(lcap->linkmodes, linkmodes) && (count == 0 || speeds[count - 1] != lcap->speed)) { speeds[count++] = lcap->speed; if (count >= size) break; } } return count; } /** * phy_caps_lookup_by_linkmode() - Lookup the fastest matching link_capabilities * @linkmodes: Linkmodes to match against * * Returns: The highest-speed link_capabilities that intersects the given * linkmodes. In case several DUPLEX_ options exist at that speed, * DUPLEX_FULL is matched first. NULL is returned if no match. */ const struct link_capabilities * phy_caps_lookup_by_linkmode(const unsigned long *linkmodes) { struct link_capabilities *lcap; for_each_link_caps_desc_speed(lcap) if (linkmode_intersects(lcap->linkmodes, linkmodes)) return lcap; return NULL; } /** * phy_caps_lookup_by_linkmode_rev() - Lookup the slowest matching link_capabilities * @linkmodes: Linkmodes to match against * @fdx_only: Full duplex match only when set * * Returns: The lowest-speed link_capabilities that intersects the given * linkmodes. When set, fdx_only will ignore half-duplex matches. * NULL is returned if no match. */ const struct link_capabilities * phy_caps_lookup_by_linkmode_rev(const unsigned long *linkmodes, bool fdx_only) { struct link_capabilities *lcap; for_each_link_caps_asc_speed(lcap) { if (fdx_only && lcap->duplex != DUPLEX_FULL) continue; if (linkmode_intersects(lcap->linkmodes, linkmodes)) return lcap; } return NULL; } /** * phy_caps_lookup() - Lookup capabilities by speed/duplex that matches a mask * @speed: Speed to match * @duplex: Duplex to match * @supported: Mask of linkmodes to match * @exact: Perform an exact match or not. * * Lookup a link_capabilities entry that intersect the supported linkmodes mask, * and that matches the passed speed and duplex. * * When @exact is set, an exact match is performed on speed and duplex, meaning * that if the linkmodes for the given speed and duplex intersect the supported * mask, this capability is returned, otherwise we don't have a match and return * NULL. * * When @exact is not set, we return either an exact match, or matching capabilities * at lower speed, or the lowest matching speed, or NULL. * * Returns: a matched link_capabilities according to the above process, NULL * otherwise. */ const struct link_capabilities * phy_caps_lookup(int speed, unsigned int duplex, const unsigned long *supported, bool exact) { const struct link_capabilities *lcap, *last = NULL; for_each_link_caps_desc_speed(lcap) { if (linkmode_intersects(lcap->linkmodes, supported)) { last = lcap; /* exact match on speed and duplex*/ if (lcap->speed == speed && lcap->duplex == duplex) { return lcap; } else if (!exact) { if (lcap->speed <= speed) return lcap; } } } if (!exact) return last; return NULL; } EXPORT_SYMBOL_GPL(phy_caps_lookup); /** * phy_caps_linkmode_max_speed() - Clamp a linkmodes set to a max speed * @max_speed: Speed limit for the linkmode set * @linkmodes: Linkmodes to limit */ void phy_caps_linkmode_max_speed(u32 max_speed, unsigned long *linkmodes) { struct link_capabilities *lcap; for_each_link_caps_desc_speed(lcap) if (lcap->speed > max_speed) linkmode_andnot(linkmodes, linkmodes, lcap->linkmodes); else break; } /** * phy_caps_valid() - Validate a linkmodes set agains given speed and duplex * @speed: input speed to validate * @duplex: input duplex to validate. Passing DUPLEX_UNKNOWN is always not valid * @linkmodes: The linkmodes to validate * * Returns: True if at least one of the linkmodes in @linkmodes can function at * the given speed and duplex, false otherwise. */ bool phy_caps_valid(int speed, int duplex, const unsigned long *linkmodes) { int capa = speed_duplex_to_capa(speed, duplex); if (capa < 0) return false; return linkmode_intersects(link_caps[capa].linkmodes, linkmodes); } /** * phy_caps_linkmodes() - Convert a bitfield of capabilities into linkmodes * @caps: The list of caps, each bit corresponding to a LINK_CAPA value * @linkmodes: The set of linkmodes to fill. Must be previously initialized. */ void phy_caps_linkmodes(unsigned long caps, unsigned long *linkmodes) { unsigned long capa; for_each_set_bit(capa, &caps, __LINK_CAPA_MAX) linkmode_or(linkmodes, linkmodes, link_caps[capa].linkmodes); } EXPORT_SYMBOL_GPL(phy_caps_linkmodes); /** * phy_caps_from_interface() - Get the link capa from a given PHY interface * @interface: The PHY interface we want to get the possible Speed/Duplex from * * Returns: A bitmask of LINK_CAPA_xxx values that can be achieved with the * provided interface. */ unsigned long phy_caps_from_interface(phy_interface_t interface) { unsigned long link_caps = 0; switch (interface) { case PHY_INTERFACE_MODE_USXGMII: link_caps |= BIT(LINK_CAPA_10000FD) | BIT(LINK_CAPA_5000FD); fallthrough; case PHY_INTERFACE_MODE_10G_QXGMII: link_caps |= BIT(LINK_CAPA_2500FD); fallthrough; case PHY_INTERFACE_MODE_RGMII_TXID: case PHY_INTERFACE_MODE_RGMII_RXID: case PHY_INTERFACE_MODE_RGMII_ID: case PHY_INTERFACE_MODE_RGMII: case PHY_INTERFACE_MODE_PSGMII: case PHY_INTERFACE_MODE_QSGMII: case PHY_INTERFACE_MODE_QUSGMII: case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_GMII: link_caps |= BIT(LINK_CAPA_1000HD) | BIT(LINK_CAPA_1000FD); fallthrough; case PHY_INTERFACE_MODE_REVRMII: case PHY_INTERFACE_MODE_RMII: case PHY_INTERFACE_MODE_SMII: case PHY_INTERFACE_MODE_REVMII: case PHY_INTERFACE_MODE_MII: link_caps |= BIT(LINK_CAPA_10HD) | BIT(LINK_CAPA_10FD); fallthrough; case PHY_INTERFACE_MODE_100BASEX: link_caps |= BIT(LINK_CAPA_100HD) | BIT(LINK_CAPA_100FD); break; case PHY_INTERFACE_MODE_TBI: case PHY_INTERFACE_MODE_MOCA: case PHY_INTERFACE_MODE_RTBI: case PHY_INTERFACE_MODE_1000BASEX: link_caps |= BIT(LINK_CAPA_1000HD); fallthrough; case PHY_INTERFACE_MODE_1000BASEKX: case PHY_INTERFACE_MODE_TRGMII: link_caps |= BIT(LINK_CAPA_1000FD); break; case PHY_INTERFACE_MODE_2500BASEX: link_caps |= BIT(LINK_CAPA_2500FD); break; case PHY_INTERFACE_MODE_5GBASER: link_caps |= BIT(LINK_CAPA_5000FD); break; case PHY_INTERFACE_MODE_XGMII: case PHY_INTERFACE_MODE_RXAUI: case PHY_INTERFACE_MODE_XAUI: case PHY_INTERFACE_MODE_10GBASER: case PHY_INTERFACE_MODE_10GKR: link_caps |= BIT(LINK_CAPA_10000FD); break; case PHY_INTERFACE_MODE_25GBASER: link_caps |= BIT(LINK_CAPA_25000FD); break; case PHY_INTERFACE_MODE_XLGMII: link_caps |= BIT(LINK_CAPA_40000FD); break; case PHY_INTERFACE_MODE_INTERNAL: link_caps |= LINK_CAPA_ALL; break; case PHY_INTERFACE_MODE_NA: case PHY_INTERFACE_MODE_MAX: break; } return link_caps; } EXPORT_SYMBOL_GPL(phy_caps_from_interface);