drivers/net/ethernet/sfc/falcon/mdio_10g.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /****************************************************************************
   3  * Driver for Solarflare network controllers and boards
   4  * Copyright 2006-2011 Solarflare Communications Inc.
   5  */
   6
   7 #ifndef EF4_MDIO_10G_H
   8 #define EF4_MDIO_10G_H
   9
  10 #include <linux/mdio.h>
  11
  12 /*
  13  * Helper functions for doing 10G MDIO as specified in IEEE 802.3 clause 45.
  14  */
  15
  16 #include "efx.h"
  17
  18 static inline unsigned ef4_mdio_id_rev(u32 id) { return id & 0xf; }
  19 static inline unsigned ef4_mdio_id_model(u32 id) { return (id >> 4) & 0x3f; }
  20 unsigned ef4_mdio_id_oui(u32 id);
  21
  22 static inline int ef4_mdio_read(struct ef4_nic *efx, int devad, int addr)
  23 {
  24         return efx->mdio.mdio_read(efx->net_dev, efx->mdio.prtad, devad, addr);
  25 }
  26
  27 static inline void
  28 ef4_mdio_write(struct ef4_nic *efx, int devad, int addr, int value)
  29 {
  30         efx->mdio.mdio_write(efx->net_dev, efx->mdio.prtad, devad, addr, value);
  31 }
  32
  33 static inline u32 ef4_mdio_read_id(struct ef4_nic *efx, int mmd)
  34 {
  35         u16 id_low = ef4_mdio_read(efx, mmd, MDIO_DEVID2);
  36         u16 id_hi = ef4_mdio_read(efx, mmd, MDIO_DEVID1);
  37         return (id_hi << 16) | (id_low);
  38 }
  39
  40 static inline bool ef4_mdio_phyxgxs_lane_sync(struct ef4_nic *efx)
  41 {
  42         int i, lane_status;
  43         bool sync;
  44
  45         for (i = 0; i < 2; ++i)
  46                 lane_status = ef4_mdio_read(efx, MDIO_MMD_PHYXS,
  47                                             MDIO_PHYXS_LNSTAT);
  48
  49         sync = !!(lane_status & MDIO_PHYXS_LNSTAT_ALIGN);
  50         if (!sync)
  51                 netif_dbg(efx, hw, efx->net_dev, "XGXS lane status: %x\n",
  52                           lane_status);
  53         return sync;
  54 }
  55
  56 const char *ef4_mdio_mmd_name(int mmd);
  57
  58 /*
  59  * Reset a specific MMD and wait for reset to clear.
  60  * Return number of spins left (>0) on success, -%ETIMEDOUT on failure.
  61  *
  62  * This function will sleep
  63  */
  64 int ef4_mdio_reset_mmd(struct ef4_nic *efx, int mmd, int spins, int spintime);
  65
  66 /* As ef4_mdio_check_mmd but for multiple MMDs */
  67 int ef4_mdio_check_mmds(struct ef4_nic *efx, unsigned int mmd_mask);
  68
  69 /* Check the link status of specified mmds in bit mask */
  70 bool ef4_mdio_links_ok(struct ef4_nic *efx, unsigned int mmd_mask);
  71
  72 /* Generic transmit disable support though PMAPMD */
  73 void ef4_mdio_transmit_disable(struct ef4_nic *efx);
  74
  75 /* Generic part of reconfigure: set/clear loopback bits */
  76 void ef4_mdio_phy_reconfigure(struct ef4_nic *efx);
  77
  78 /* Set the power state of the specified MMDs */
  79 void ef4_mdio_set_mmds_lpower(struct ef4_nic *efx, int low_power,
  80                               unsigned int mmd_mask);
  81
  82 /* Set (some of) the PHY settings over MDIO */
  83 int ef4_mdio_set_link_ksettings(struct ef4_nic *efx,
  84                                 const struct ethtool_link_ksettings *cmd);
  85
  86 /* Push advertising flags and restart autonegotiation */
  87 void ef4_mdio_an_reconfigure(struct ef4_nic *efx);
  88
  89 /* Get pause parameters from AN if available (otherwise return
  90  * requested pause parameters)
  91  */
  92 u8 ef4_mdio_get_pause(struct ef4_nic *efx);
  93
  94 /* Wait for specified MMDs to exit reset within a timeout */
  95 int ef4_mdio_wait_reset_mmds(struct ef4_nic *efx, unsigned int mmd_mask);
  96
  97 /* Set or clear flag, debouncing */
  98 static inline void
  99 ef4_mdio_set_flag(struct ef4_nic *efx, int devad, int addr,
 100                   int mask, bool state)
 101 {
 102         mdio_set_flag(&efx->mdio, efx->mdio.prtad, devad, addr, mask, state);
 103 }
 104
 105 /* Liveness self-test for MDIO PHYs */
 106 int ef4_mdio_test_alive(struct ef4_nic *efx);
 107
 108 #endif /* EF4_MDIO_10G_H */