mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
5a6681e22c
Rationale: The differences between Falcon and Siena are in many ways larger than those between Siena and EF10 (despite Siena being nominally "Falcon- architecture"); for instance, Falcon has no MCPU, so there is no MCDI. Removing Falcon support from the sfc driver should simplify the latter, and avoid the possibility of Falcon support being broken by changes to sfc (which are rarely if ever tested on Falcon, it being end-of-lifed hardware). The sfc-falcon driver created in this changeset is essentially a copy of the sfc driver, but with Siena- and EF10-specific code, including MCDI, removed and with the "efx_" identifier prefix changed to "ef4_" (for "EFX 4000- series") to avoid collisions when both drivers are built-in. This changeset removes Falcon from the sfc driver's PCI ID table; then in sfc I've removed obvious Falcon-related code: I removed the Falcon NIC functions, Falcon PHY code, and EFX_REV_FALCON_*, then fixed up everything that referenced them. Also, increment minor version of both drivers (to 4.1). For now, CONFIG_SFC selects CONFIG_SFC_FALCON, so that updating old configs doesn't cause Falcon support to disappear; but that should be undone at some point in the future. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
324 lines
8.5 KiB
C
324 lines
8.5 KiB
C
/****************************************************************************
|
|
* Driver for Solarflare network controllers and boards
|
|
* Copyright 2006-2011 Solarflare Communications Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation, incorporated herein by reference.
|
|
*/
|
|
/*
|
|
* Useful functions for working with MDIO clause 45 PHYs
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/delay.h>
|
|
#include "net_driver.h"
|
|
#include "mdio_10g.h"
|
|
#include "workarounds.h"
|
|
|
|
unsigned ef4_mdio_id_oui(u32 id)
|
|
{
|
|
unsigned oui = 0;
|
|
int i;
|
|
|
|
/* The bits of the OUI are designated a..x, with a=0 and b variable.
|
|
* In the id register c is the MSB but the OUI is conventionally
|
|
* written as bytes h..a, p..i, x..q. Reorder the bits accordingly. */
|
|
for (i = 0; i < 22; ++i)
|
|
if (id & (1 << (i + 10)))
|
|
oui |= 1 << (i ^ 7);
|
|
|
|
return oui;
|
|
}
|
|
|
|
int ef4_mdio_reset_mmd(struct ef4_nic *port, int mmd,
|
|
int spins, int spintime)
|
|
{
|
|
u32 ctrl;
|
|
|
|
/* Catch callers passing values in the wrong units (or just silly) */
|
|
EF4_BUG_ON_PARANOID(spins * spintime >= 5000);
|
|
|
|
ef4_mdio_write(port, mmd, MDIO_CTRL1, MDIO_CTRL1_RESET);
|
|
/* Wait for the reset bit to clear. */
|
|
do {
|
|
msleep(spintime);
|
|
ctrl = ef4_mdio_read(port, mmd, MDIO_CTRL1);
|
|
spins--;
|
|
|
|
} while (spins && (ctrl & MDIO_CTRL1_RESET));
|
|
|
|
return spins ? spins : -ETIMEDOUT;
|
|
}
|
|
|
|
static int ef4_mdio_check_mmd(struct ef4_nic *efx, int mmd)
|
|
{
|
|
int status;
|
|
|
|
if (mmd != MDIO_MMD_AN) {
|
|
/* Read MMD STATUS2 to check it is responding. */
|
|
status = ef4_mdio_read(efx, mmd, MDIO_STAT2);
|
|
if ((status & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL) {
|
|
netif_err(efx, hw, efx->net_dev,
|
|
"PHY MMD %d not responding.\n", mmd);
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This ought to be ridiculous overkill. We expect it to fail rarely */
|
|
#define MDIO45_RESET_TIME 1000 /* ms */
|
|
#define MDIO45_RESET_ITERS 100
|
|
|
|
int ef4_mdio_wait_reset_mmds(struct ef4_nic *efx, unsigned int mmd_mask)
|
|
{
|
|
const int spintime = MDIO45_RESET_TIME / MDIO45_RESET_ITERS;
|
|
int tries = MDIO45_RESET_ITERS;
|
|
int rc = 0;
|
|
int in_reset;
|
|
|
|
while (tries) {
|
|
int mask = mmd_mask;
|
|
int mmd = 0;
|
|
int stat;
|
|
in_reset = 0;
|
|
while (mask) {
|
|
if (mask & 1) {
|
|
stat = ef4_mdio_read(efx, mmd, MDIO_CTRL1);
|
|
if (stat < 0) {
|
|
netif_err(efx, hw, efx->net_dev,
|
|
"failed to read status of"
|
|
" MMD %d\n", mmd);
|
|
return -EIO;
|
|
}
|
|
if (stat & MDIO_CTRL1_RESET)
|
|
in_reset |= (1 << mmd);
|
|
}
|
|
mask = mask >> 1;
|
|
mmd++;
|
|
}
|
|
if (!in_reset)
|
|
break;
|
|
tries--;
|
|
msleep(spintime);
|
|
}
|
|
if (in_reset != 0) {
|
|
netif_err(efx, hw, efx->net_dev,
|
|
"not all MMDs came out of reset in time."
|
|
" MMDs still in reset: %x\n", in_reset);
|
|
rc = -ETIMEDOUT;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int ef4_mdio_check_mmds(struct ef4_nic *efx, unsigned int mmd_mask)
|
|
{
|
|
int mmd = 0, probe_mmd, devs1, devs2;
|
|
u32 devices;
|
|
|
|
/* Historically we have probed the PHYXS to find out what devices are
|
|
* present,but that doesn't work so well if the PHYXS isn't expected
|
|
* to exist, if so just find the first item in the list supplied. */
|
|
probe_mmd = (mmd_mask & MDIO_DEVS_PHYXS) ? MDIO_MMD_PHYXS :
|
|
__ffs(mmd_mask);
|
|
|
|
/* Check all the expected MMDs are present */
|
|
devs1 = ef4_mdio_read(efx, probe_mmd, MDIO_DEVS1);
|
|
devs2 = ef4_mdio_read(efx, probe_mmd, MDIO_DEVS2);
|
|
if (devs1 < 0 || devs2 < 0) {
|
|
netif_err(efx, hw, efx->net_dev,
|
|
"failed to read devices present\n");
|
|
return -EIO;
|
|
}
|
|
devices = devs1 | (devs2 << 16);
|
|
if ((devices & mmd_mask) != mmd_mask) {
|
|
netif_err(efx, hw, efx->net_dev,
|
|
"required MMDs not present: got %x, wanted %x\n",
|
|
devices, mmd_mask);
|
|
return -ENODEV;
|
|
}
|
|
netif_vdbg(efx, hw, efx->net_dev, "Devices present: %x\n", devices);
|
|
|
|
/* Check all required MMDs are responding and happy. */
|
|
while (mmd_mask) {
|
|
if ((mmd_mask & 1) && ef4_mdio_check_mmd(efx, mmd))
|
|
return -EIO;
|
|
mmd_mask = mmd_mask >> 1;
|
|
mmd++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool ef4_mdio_links_ok(struct ef4_nic *efx, unsigned int mmd_mask)
|
|
{
|
|
/* If the port is in loopback, then we should only consider a subset
|
|
* of mmd's */
|
|
if (LOOPBACK_INTERNAL(efx))
|
|
return true;
|
|
else if (LOOPBACK_MASK(efx) & LOOPBACKS_WS)
|
|
return false;
|
|
else if (ef4_phy_mode_disabled(efx->phy_mode))
|
|
return false;
|
|
else if (efx->loopback_mode == LOOPBACK_PHYXS)
|
|
mmd_mask &= ~(MDIO_DEVS_PHYXS |
|
|
MDIO_DEVS_PCS |
|
|
MDIO_DEVS_PMAPMD |
|
|
MDIO_DEVS_AN);
|
|
else if (efx->loopback_mode == LOOPBACK_PCS)
|
|
mmd_mask &= ~(MDIO_DEVS_PCS |
|
|
MDIO_DEVS_PMAPMD |
|
|
MDIO_DEVS_AN);
|
|
else if (efx->loopback_mode == LOOPBACK_PMAPMD)
|
|
mmd_mask &= ~(MDIO_DEVS_PMAPMD |
|
|
MDIO_DEVS_AN);
|
|
|
|
return mdio45_links_ok(&efx->mdio, mmd_mask);
|
|
}
|
|
|
|
void ef4_mdio_transmit_disable(struct ef4_nic *efx)
|
|
{
|
|
ef4_mdio_set_flag(efx, MDIO_MMD_PMAPMD,
|
|
MDIO_PMA_TXDIS, MDIO_PMD_TXDIS_GLOBAL,
|
|
efx->phy_mode & PHY_MODE_TX_DISABLED);
|
|
}
|
|
|
|
void ef4_mdio_phy_reconfigure(struct ef4_nic *efx)
|
|
{
|
|
ef4_mdio_set_flag(efx, MDIO_MMD_PMAPMD,
|
|
MDIO_CTRL1, MDIO_PMA_CTRL1_LOOPBACK,
|
|
efx->loopback_mode == LOOPBACK_PMAPMD);
|
|
ef4_mdio_set_flag(efx, MDIO_MMD_PCS,
|
|
MDIO_CTRL1, MDIO_PCS_CTRL1_LOOPBACK,
|
|
efx->loopback_mode == LOOPBACK_PCS);
|
|
ef4_mdio_set_flag(efx, MDIO_MMD_PHYXS,
|
|
MDIO_CTRL1, MDIO_PHYXS_CTRL1_LOOPBACK,
|
|
efx->loopback_mode == LOOPBACK_PHYXS_WS);
|
|
}
|
|
|
|
static void ef4_mdio_set_mmd_lpower(struct ef4_nic *efx,
|
|
int lpower, int mmd)
|
|
{
|
|
int stat = ef4_mdio_read(efx, mmd, MDIO_STAT1);
|
|
|
|
netif_vdbg(efx, drv, efx->net_dev, "Setting low power mode for MMD %d to %d\n",
|
|
mmd, lpower);
|
|
|
|
if (stat & MDIO_STAT1_LPOWERABLE) {
|
|
ef4_mdio_set_flag(efx, mmd, MDIO_CTRL1,
|
|
MDIO_CTRL1_LPOWER, lpower);
|
|
}
|
|
}
|
|
|
|
void ef4_mdio_set_mmds_lpower(struct ef4_nic *efx,
|
|
int low_power, unsigned int mmd_mask)
|
|
{
|
|
int mmd = 0;
|
|
mmd_mask &= ~MDIO_DEVS_AN;
|
|
while (mmd_mask) {
|
|
if (mmd_mask & 1)
|
|
ef4_mdio_set_mmd_lpower(efx, low_power, mmd);
|
|
mmd_mask = (mmd_mask >> 1);
|
|
mmd++;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ef4_mdio_set_settings - Set (some of) the PHY settings over MDIO.
|
|
* @efx: Efx NIC
|
|
* @ecmd: New settings
|
|
*/
|
|
int ef4_mdio_set_settings(struct ef4_nic *efx, struct ethtool_cmd *ecmd)
|
|
{
|
|
struct ethtool_cmd prev = { .cmd = ETHTOOL_GSET };
|
|
|
|
efx->phy_op->get_settings(efx, &prev);
|
|
|
|
if (ecmd->advertising == prev.advertising &&
|
|
ethtool_cmd_speed(ecmd) == ethtool_cmd_speed(&prev) &&
|
|
ecmd->duplex == prev.duplex &&
|
|
ecmd->port == prev.port &&
|
|
ecmd->autoneg == prev.autoneg)
|
|
return 0;
|
|
|
|
/* We can only change these settings for -T PHYs */
|
|
if (prev.port != PORT_TP || ecmd->port != PORT_TP)
|
|
return -EINVAL;
|
|
|
|
/* Check that PHY supports these settings */
|
|
if (!ecmd->autoneg ||
|
|
(ecmd->advertising | SUPPORTED_Autoneg) & ~prev.supported)
|
|
return -EINVAL;
|
|
|
|
ef4_link_set_advertising(efx, ecmd->advertising | ADVERTISED_Autoneg);
|
|
ef4_mdio_an_reconfigure(efx);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ef4_mdio_an_reconfigure - Push advertising flags and restart autonegotiation
|
|
* @efx: Efx NIC
|
|
*/
|
|
void ef4_mdio_an_reconfigure(struct ef4_nic *efx)
|
|
{
|
|
int reg;
|
|
|
|
WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN));
|
|
|
|
/* Set up the base page */
|
|
reg = ADVERTISE_CSMA | ADVERTISE_RESV;
|
|
if (efx->link_advertising & ADVERTISED_Pause)
|
|
reg |= ADVERTISE_PAUSE_CAP;
|
|
if (efx->link_advertising & ADVERTISED_Asym_Pause)
|
|
reg |= ADVERTISE_PAUSE_ASYM;
|
|
ef4_mdio_write(efx, MDIO_MMD_AN, MDIO_AN_ADVERTISE, reg);
|
|
|
|
/* Set up the (extended) next page */
|
|
efx->phy_op->set_npage_adv(efx, efx->link_advertising);
|
|
|
|
/* Enable and restart AN */
|
|
reg = ef4_mdio_read(efx, MDIO_MMD_AN, MDIO_CTRL1);
|
|
reg |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART | MDIO_AN_CTRL1_XNP;
|
|
ef4_mdio_write(efx, MDIO_MMD_AN, MDIO_CTRL1, reg);
|
|
}
|
|
|
|
u8 ef4_mdio_get_pause(struct ef4_nic *efx)
|
|
{
|
|
BUILD_BUG_ON(EF4_FC_AUTO & (EF4_FC_RX | EF4_FC_TX));
|
|
|
|
if (!(efx->wanted_fc & EF4_FC_AUTO))
|
|
return efx->wanted_fc;
|
|
|
|
WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN));
|
|
|
|
return mii_resolve_flowctrl_fdx(
|
|
mii_advertise_flowctrl(efx->wanted_fc),
|
|
ef4_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_LPA));
|
|
}
|
|
|
|
int ef4_mdio_test_alive(struct ef4_nic *efx)
|
|
{
|
|
int rc;
|
|
int devad = __ffs(efx->mdio.mmds);
|
|
u16 physid1, physid2;
|
|
|
|
mutex_lock(&efx->mac_lock);
|
|
|
|
physid1 = ef4_mdio_read(efx, devad, MDIO_DEVID1);
|
|
physid2 = ef4_mdio_read(efx, devad, MDIO_DEVID2);
|
|
|
|
if ((physid1 == 0x0000) || (physid1 == 0xffff) ||
|
|
(physid2 == 0x0000) || (physid2 == 0xffff)) {
|
|
netif_err(efx, hw, efx->net_dev,
|
|
"no MDIO PHY present with ID %d\n", efx->mdio.prtad);
|
|
rc = -EINVAL;
|
|
} else {
|
|
rc = ef4_mdio_check_mmds(efx, efx->mdio.mmds);
|
|
}
|
|
|
|
mutex_unlock(&efx->mac_lock);
|
|
return rc;
|
|
}
|