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sfc: Make PHY flash mode a device attribute, not a module parameter

Browse source 
This allows updating PHY firmware for one interface without removing
all other interfaces handled by the driver.

Replace tx_disabled flags and 10Xpress status enumeration with flags in
enum efx_phy_mode.

Prevent an interface from being brought up while in PHY flash mode.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Ben Hutchings 2008-09-01 12:48:17 +01:00 committed by Jeff Garzik
parent 3594e131b2
commit f8b87c1701
9 changed files with 171 additions and 123 deletions
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2
drivers/net/sfc/boards.h
View file

@ -21,7 +21,5 @@ enum efx_board_type {
extern int efx_set_board_info(struct efx_nic *efx, u16 revision_info);
extern int sfe4001_init(struct efx_nic *efx);
/* Are we putting the PHY into flash config mode */
extern unsigned int sfe4001_phy_flash_cfg;
#endif

3
drivers/net/sfc/efx.c
View file

@ -1296,6 +1296,9 @@ static int efx_net_open(struct net_device *net_dev)
EFX_LOG(efx, "opening device %s on CPU %d\n", net_dev->name,
raw_smp_processor_id());
if (efx->phy_mode & PHY_MODE_SPECIAL)
return -EBUSY;
efx_start_all(efx);
return 0;
}

15
drivers/net/sfc/falcon_xmac.c
View file

@ -69,10 +69,6 @@ static int falcon_reset_xmac(struct efx_nic *efx)
udelay(10);
}
/* This often fails when DSP is disabled, ignore it */
if (sfe4001_phy_flash_cfg)
return 0;
EFX_ERR(efx, "timed out waiting for XMAC core reset\n");
return -ETIMEDOUT;
}
@ -444,7 +440,8 @@ static bool falcon_check_xaui_link_up(struct efx_nic *efx)
max_tries = tries;
if ((efx->loopback_mode == LOOPBACK_NETWORK) ||
(efx->phy_type == PHY_TYPE_NONE))
(efx->phy_type == PHY_TYPE_NONE) ||
efx_phy_mode_disabled(efx->phy_mode))
return false;
while (tries) {
@ -471,7 +468,11 @@ void falcon_reconfigure_xmac(struct efx_nic *efx)
falcon_deconfigure_mac_wrapper(efx);
efx->tx_disabled = LOOPBACK_INTERNAL(efx);
/* Reconfigure the PHY, disabling transmit in mac level loopback. */
if (LOOPBACK_INTERNAL(efx))
efx->phy_mode |= PHY_MODE_TX_DISABLED;
else
efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
efx->phy_op->reconfigure(efx);
falcon_reconfigure_xgxs_core(efx);
@ -566,7 +567,7 @@ int falcon_check_xmac(struct efx_nic *efx)
int rc;
if ((efx->loopback_mode == LOOPBACK_NETWORK) ||
(efx->phy_type == PHY_TYPE_NONE))
efx_phy_mode_disabled(efx->phy_mode))
return 0;
falcon_mask_status_intr(efx, false);

4
drivers/net/sfc/mdio_10g.c
View file

@ -172,6 +172,8 @@ bool mdio_clause45_links_ok(struct efx_nic *efx, unsigned int mmd_mask)
return true;
else if (efx->loopback_mode == LOOPBACK_NETWORK)
return false;
else if (efx_phy_mode_disabled(efx->phy_mode))
return false;
else if (efx->loopback_mode == LOOPBACK_PHYXS)
mmd_mask &= ~(MDIO_MMDREG_DEVS0_PHYXS |
MDIO_MMDREG_DEVS0_PCS |
@ -206,7 +208,7 @@ void mdio_clause45_transmit_disable(struct efx_nic *efx)
ctrl1 = ctrl2 = mdio_clause45_read(efx, phy_id, MDIO_MMD_PMAPMD,
MDIO_MMDREG_TXDIS);
if (efx->tx_disabled)
if (efx->phy_mode & PHY_MODE_TX_DISABLED)
ctrl2 |= (1 << MDIO_MMDREG_TXDIS_GLOBAL_LBN);
else
ctrl1 &= ~(1 << MDIO_MMDREG_TXDIS_GLOBAL_LBN);

21
drivers/net/sfc/net_driver.h
View file

@ -519,6 +519,23 @@ struct efx_phy_operations {
unsigned loopbacks;
};
/**
* @enum efx_phy_mode - PHY operating mode flags
* @PHY_MODE_NORMAL: on and should pass traffic
* @PHY_MODE_TX_DISABLED: on with TX disabled
* @PHY_MODE_SPECIAL: on but will not pass traffic
*/
enum efx_phy_mode {
PHY_MODE_NORMAL = 0,
PHY_MODE_TX_DISABLED = 1,
PHY_MODE_SPECIAL = 8,
};
static inline bool efx_phy_mode_disabled(enum efx_phy_mode mode)
{
return (mode & ~PHY_MODE_TX_DISABLED) != 0;
}
/*
* Efx extended statistics
*
@ -661,7 +678,7 @@ union efx_multicast_hash {
* @phy_op: PHY interface
* @phy_data: PHY private data (including PHY-specific stats)
* @mii: PHY interface
* @tx_disabled: PHY transmitter turned off
* @phy_mode: PHY operating mode
* @link_up: Link status
* @link_options: Link options (MII/GMII format)
* @n_link_state_changes: Number of times the link has changed state
@ -735,7 +752,7 @@ struct efx_nic {
struct efx_phy_operations *phy_op;
void *phy_data;
struct mii_if_info mii;
bool tx_disabled;
enum efx_phy_mode phy_mode;
bool link_up;
unsigned int link_options;

8
drivers/net/sfc/phy.h
View file

@ -15,14 +15,6 @@
*/
extern struct efx_phy_operations falcon_tenxpress_phy_ops;
enum tenxpress_state {
TENXPRESS_STATUS_OFF = 0,
TENXPRESS_STATUS_OTEMP = 1,
TENXPRESS_STATUS_NORMAL = 2,
};
extern void tenxpress_set_state(struct efx_nic *efx,
enum tenxpress_state state);
extern void tenxpress_phy_blink(struct efx_nic *efx, bool blink);
extern void tenxpress_crc_err(struct efx_nic *efx);

186
drivers/net/sfc/sfe4001.c
View file

@ -13,6 +13,7 @@
* the PHY
*/
#include <linux/delay.h>
#include "net_driver.h"
#include "efx.h"
#include "phy.h"
#include "boards.h"
@ -120,52 +121,15 @@ static void sfe4001_poweroff(struct efx_nic *efx)
i2c_smbus_read_byte_data(hwmon_client, RSL);
}
static void sfe4001_fini(struct efx_nic *efx)
static int sfe4001_poweron(struct efx_nic *efx)
{
EFX_INFO(efx, "%s\n", __func__);
sfe4001_poweroff(efx);
i2c_unregister_device(efx->board_info.ioexp_client);
i2c_unregister_device(efx->board_info.hwmon_client);
}
/* The P0_EN_3V3X line on SFE4001 boards (from A2 onward) is connected
* to the FLASH_CFG_1 input on the DSP. We must keep it high at power-
* up to allow writing the flash (done through MDIO from userland).
*/
unsigned int sfe4001_phy_flash_cfg;
module_param_named(phy_flash_cfg, sfe4001_phy_flash_cfg, uint, 0444);
MODULE_PARM_DESC(phy_flash_cfg,
"Force PHY to enter flash configuration mode");
/* This board uses an I2C expander to provider power to the PHY, which needs to
* be turned on before the PHY can be used.
* Context: Process context, rtnl lock held
*/
int sfe4001_init(struct efx_nic *efx)
{
struct i2c_client *hwmon_client, *ioexp_client;
struct i2c_client *hwmon_client = efx->board_info.hwmon_client;
struct i2c_client *ioexp_client = efx->board_info.ioexp_client;
unsigned int i, j;
int rc;
u8 out;
efx_dword_t reg;
hwmon_client = i2c_new_dummy(&efx->i2c_adap, MAX6647);
if (!hwmon_client)
return -EIO;
efx->board_info.hwmon_client = hwmon_client;
ioexp_client = i2c_new_dummy(&efx->i2c_adap, PCA9539);
if (!ioexp_client) {
rc = -EIO;
goto fail_hwmon;
}
efx->board_info.ioexp_client = ioexp_client;
/* 10Xpress has fixed-function LED pins, so there is no board-specific
* blink code. */
efx->board_info.blink = tenxpress_phy_blink;
/* Ensure that XGXS and XAUI SerDes are held in reset */
EFX_POPULATE_DWORD_7(reg, XX_PWRDNA_EN, 1,
XX_PWRDNB_EN, 1,
@ -177,33 +141,15 @@ int sfe4001_init(struct efx_nic *efx)
falcon_xmac_writel(efx, &reg, XX_PWR_RST_REG_MAC);
udelay(10);
efx->board_info.fini = sfe4001_fini;
/* Set DSP over-temperature alert threshold */
EFX_INFO(efx, "DSP cut-out at %dC\n", xgphy_max_temperature);
rc = i2c_smbus_write_byte_data(hwmon_client, WLHO,
xgphy_max_temperature);
if (rc)
goto fail_ioexp;
/* Read it back and verify */
rc = i2c_smbus_read_byte_data(hwmon_client, RLHN);
if (rc < 0)
goto fail_ioexp;
if (rc != xgphy_max_temperature) {
rc = -EFAULT;
goto fail_ioexp;
}
/* Clear any previous over-temperature alert */
rc = i2c_smbus_read_byte_data(hwmon_client, RSL);
if (rc < 0)
goto fail_ioexp;
return rc;
/* Enable port 0 and port 1 outputs on IO expander */
rc = i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0x00);
if (rc)
goto fail_ioexp;
return rc;
rc = i2c_smbus_write_byte_data(ioexp_client, P1_CONFIG,
0xff & ~(1 << P1_SPARE_LBN));
if (rc)
@ -231,7 +177,7 @@ int sfe4001_init(struct efx_nic *efx)
out = 0xff & ~((1 << P0_EN_1V2_LBN) | (1 << P0_EN_2V5_LBN) |
(1 << P0_EN_3V3X_LBN) | (1 << P0_EN_5V_LBN) |
(1 << P0_X_TRST_LBN));
if (sfe4001_phy_flash_cfg)
if (efx->phy_mode & PHY_MODE_SPECIAL)
out |= 1 << P0_EN_3V3X_LBN;
rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out);
@ -250,9 +196,9 @@ int sfe4001_init(struct efx_nic *efx)
/* In flash config mode, DSP does not turn on AFE, so
* just wait 1 second.
*/
if (sfe4001_phy_flash_cfg) {
if (efx->phy_mode & PHY_MODE_SPECIAL) {
schedule_timeout_uninterruptible(HZ);
goto done;
return 0;
}
for (j = 0; j < 10; ++j) {
@ -263,23 +209,127 @@ int sfe4001_init(struct efx_nic *efx)
if (rc < 0)
goto fail_on;
if (rc & (1 << P1_AFE_PWD_LBN))
goto done;
return 0;
}
}
EFX_INFO(efx, "timed out waiting for DSP boot\n");
rc = -ETIMEDOUT;
goto fail_on;
fail_on:
sfe4001_poweroff(efx);
return rc;
}
/* On SFE4001 rev A2 and later, we can control the FLASH_CFG_1 pin
* using the 3V3X output of the IO-expander. Allow the user to set
* this when the device is stopped, and keep it stopped then.
*/
static ssize_t show_phy_flash_cfg(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
return sprintf(buf, "%d\n", !!(efx->phy_mode & PHY_MODE_SPECIAL));
}
static ssize_t set_phy_flash_cfg(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
enum efx_phy_mode old_mode, new_mode;
int err;
rtnl_lock();
old_mode = efx->phy_mode;
if (count == 0 || *buf == '0')
new_mode = old_mode & ~PHY_MODE_SPECIAL;
else
new_mode = PHY_MODE_SPECIAL;
if (old_mode == new_mode) {
err = 0;
} else if (efx->state != STATE_RUNNING || netif_running(efx->net_dev)) {
err = -EBUSY;
} else {
efx->phy_mode = new_mode;
err = sfe4001_poweron(efx);
efx_reconfigure_port(efx);
}
rtnl_unlock();
return err ? err : count;
}
static DEVICE_ATTR(phy_flash_cfg, 0644, show_phy_flash_cfg, set_phy_flash_cfg);
static void sfe4001_fini(struct efx_nic *efx)
{
EFX_INFO(efx, "%s\n", __func__);
device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
sfe4001_poweroff(efx);
i2c_unregister_device(efx->board_info.ioexp_client);
i2c_unregister_device(efx->board_info.hwmon_client);
}
/* This board uses an I2C expander to provider power to the PHY, which needs to
* be turned on before the PHY can be used.
* Context: Process context, rtnl lock held
*/
int sfe4001_init(struct efx_nic *efx)
{
struct i2c_client *hwmon_client;
int rc;
hwmon_client = i2c_new_dummy(&efx->i2c_adap, MAX6647);
if (!hwmon_client)
return -EIO;
efx->board_info.hwmon_client = hwmon_client;
/* Set DSP over-temperature alert threshold */
EFX_INFO(efx, "DSP cut-out at %dC\n", xgphy_max_temperature);
rc = i2c_smbus_write_byte_data(hwmon_client, WLHO,
xgphy_max_temperature);
if (rc)
goto fail_ioexp;
/* Read it back and verify */
rc = i2c_smbus_read_byte_data(hwmon_client, RLHN);
if (rc < 0)
goto fail_ioexp;
if (rc != xgphy_max_temperature) {
rc = -EFAULT;
goto fail_ioexp;
}
efx->board_info.ioexp_client = i2c_new_dummy(&efx->i2c_adap, PCA9539);
if (!efx->board_info.ioexp_client) {
rc = -EIO;
goto fail_hwmon;
}
/* 10Xpress has fixed-function LED pins, so there is no board-specific
* blink code. */
efx->board_info.blink = tenxpress_phy_blink;
efx->board_info.fini = sfe4001_fini;
rc = sfe4001_poweron(efx);
if (rc)
goto fail_ioexp;
rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
if (rc)
goto fail_on;
done:
EFX_INFO(efx, "PHY is powered on\n");
return 0;
fail_on:
sfe4001_poweroff(efx);
fail_ioexp:
i2c_unregister_device(ioexp_client);
i2c_unregister_device(efx->board_info.ioexp_client);
fail_hwmon:
i2c_unregister_device(hwmon_client);
i2c_unregister_device(hwmon_client);
return rc;
}

46
drivers/net/sfc/tenxpress.c
View file

@ -119,27 +119,12 @@ MODULE_PARM_DESC(crc_error_reset_threshold,
"Max number of CRC errors before XAUI reset");
struct tenxpress_phy_data {
enum tenxpress_state state;
enum efx_loopback_mode loopback_mode;
atomic_t bad_crc_count;
bool tx_disabled;
enum efx_phy_mode phy_mode;
int bad_lp_tries;
};
static int tenxpress_state_is(struct efx_nic *efx, int state)
{
struct tenxpress_phy_data *phy_data = efx->phy_data;
return (phy_data != NULL) && (state == phy_data->state);
}
void tenxpress_set_state(struct efx_nic *efx,
enum tenxpress_state state)
{
struct tenxpress_phy_data *phy_data = efx->phy_data;
if (phy_data != NULL)
phy_data->state = state;
}
void tenxpress_crc_err(struct efx_nic *efx)
{
struct tenxpress_phy_data *phy_data = efx->phy_data;
@ -214,15 +199,12 @@ static int tenxpress_phy_init(struct efx_nic *efx)
if (!phy_data)
return -ENOMEM;
efx->phy_data = phy_data;
phy_data->phy_mode = efx->phy_mode;
tenxpress_set_state(efx, TENXPRESS_STATUS_NORMAL);
if (!sfe4001_phy_flash_cfg) {
rc = mdio_clause45_wait_reset_mmds(efx,
TENXPRESS_REQUIRED_DEVS);
if (rc < 0)
goto fail;
}
rc = mdio_clause45_wait_reset_mmds(efx,
TENXPRESS_REQUIRED_DEVS);
if (rc < 0)
goto fail;
rc = mdio_clause45_check_mmds(efx, TENXPRESS_REQUIRED_DEVS, 0);
if (rc < 0)
@ -370,13 +352,16 @@ static void tenxpress_phy_reconfigure(struct efx_nic *efx)
bool loop_change = LOOPBACK_OUT_OF(phy_data, efx,
TENXPRESS_LOOPBACKS);
if (!tenxpress_state_is(efx, TENXPRESS_STATUS_NORMAL))
if (efx->phy_mode & PHY_MODE_SPECIAL) {
phy_data->phy_mode = efx->phy_mode;
return;
}
/* When coming out of transmit disable, coming out of low power
* mode, or moving out of any PHY internal loopback mode,
* perform a special software reset */
if ((phy_data->tx_disabled && !efx->tx_disabled) ||
if ((efx->phy_mode == PHY_MODE_NORMAL &&
phy_data->phy_mode != PHY_MODE_NORMAL) ||
loop_change) {
tenxpress_special_reset(efx);
falcon_reset_xaui(efx);
@ -386,8 +371,8 @@ static void tenxpress_phy_reconfigure(struct efx_nic *efx)
mdio_clause45_phy_reconfigure(efx);
tenxpress_phyxs_loopback(efx);
phy_data->tx_disabled = efx->tx_disabled;
phy_data->loopback_mode = efx->loopback_mode;
phy_data->phy_mode = efx->phy_mode;
efx->link_up = tenxpress_link_ok(efx, false);
efx->link_options = GM_LPA_10000FULL;
}
@ -402,16 +387,15 @@ static void tenxpress_phy_clear_interrupt(struct efx_nic *efx)
static int tenxpress_phy_check_hw(struct efx_nic *efx)
{
struct tenxpress_phy_data *phy_data = efx->phy_data;
bool phy_up = tenxpress_state_is(efx, TENXPRESS_STATUS_NORMAL);
bool link_ok;
link_ok = phy_up && tenxpress_link_ok(efx, true);
link_ok = (phy_data->phy_mode == PHY_MODE_NORMAL &&
tenxpress_link_ok(efx, true));
if (link_ok != efx->link_up)
falcon_xmac_sim_phy_event(efx);
/* Nothing to check if we've already shut down the PHY */
if (!phy_up)
if (phy_data->phy_mode != PHY_MODE_NORMAL)
return 0;
if (atomic_read(&phy_data->bad_crc_count) > crc_error_reset_threshold) {

9
drivers/net/sfc/xfp_phy.c
View file

@ -40,7 +40,7 @@ void xfp_set_led(struct efx_nic *p, int led, int mode)
}
struct xfp_phy_data {
bool tx_disabled;
enum efx_phy_mode phy_mode;
};
#define XFP_MAX_RESET_TIME 500
@ -93,7 +93,7 @@ static int xfp_phy_init(struct efx_nic *efx)
" %x)\n", devid, MDIO_ID_OUI(devid), MDIO_ID_MODEL(devid),
MDIO_ID_REV(devid));
phy_data->tx_disabled = efx->tx_disabled;
phy_data->phy_mode = efx->phy_mode;
rc = xfp_reset_phy(efx);
@ -136,13 +136,14 @@ static void xfp_phy_reconfigure(struct efx_nic *efx)
struct xfp_phy_data *phy_data = efx->phy_data;
/* Reset the PHY when moving from tx off to tx on */
if (phy_data->tx_disabled && !efx->tx_disabled)
if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
(phy_data->phy_mode & PHY_MODE_TX_DISABLED))
xfp_reset_phy(efx);
mdio_clause45_transmit_disable(efx);
mdio_clause45_phy_reconfigure(efx);
phy_data->tx_disabled = efx->tx_disabled;
phy_data->phy_mode = efx->phy_mode;
efx->link_up = xfp_link_ok(efx);
efx->link_options = GM_LPA_10000FULL;
}