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sfc: Implement ethtool reset operation
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Refactor efx_reset_down() and efx_reset_up() accordingly.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@davem330
Ben Hutchings authored and davem330 committed Nov 30, 2009
1 parent 89c758f commit eb9f674
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Showing 5 changed files with 84 additions and 50 deletions.
98 changes: 48 additions & 50 deletions drivers/net/sfc/efx.c
View file
Expand Up @@ -1754,58 +1754,49 @@ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
rc = efx->type->init(efx);
if (rc) {
EFX_ERR(efx, "failed to initialise NIC\n");
ok = false;
goto fail;
}

if (!ok)
goto fail;

if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
if (ok) {
rc = efx->phy_op->init(efx);
if (rc)
ok = false;
if (efx->phy_op->reconfigure(efx))
EFX_ERR(efx, "could not restore PHY settings\n");
}
if (!ok)
efx->port_initialized = false;
rc = efx->phy_op->init(efx);
if (rc)
goto fail;
if (efx->phy_op->reconfigure(efx))
EFX_ERR(efx, "could not restore PHY settings\n");
}

if (ok) {
efx->mac_op->reconfigure(efx);
efx->mac_op->reconfigure(efx);

efx_init_channels(efx);
}
efx_init_channels(efx);

mutex_unlock(&efx->spi_lock);
mutex_unlock(&efx->mac_lock);

efx_start_all(efx);

return 0;

fail:
efx->port_initialized = false;

mutex_unlock(&efx->spi_lock);
mutex_unlock(&efx->mac_lock);

if (ok)
efx_start_all(efx);
return rc;
}

/* Reset the NIC as transparently as possible. Do not reset the PHY
* Note that the reset may fail, in which case the card will be left
* in a most-probably-unusable state.
*
* This function will sleep. You cannot reset from within an atomic
* state; use efx_schedule_reset() instead.
/* Reset the NIC using the specified method. Note that the reset may
* fail, in which case the card will be left in an unusable state.
*
* Grabs the rtnl_lock.
* Caller must hold the rtnl_lock.
*/
static int efx_reset(struct efx_nic *efx)
int efx_reset(struct efx_nic *efx, enum reset_type method)
{
enum reset_type method = efx->reset_pending;
int rc = 0;

/* Serialise with kernel interfaces */
rtnl_lock();

/* If we're not RUNNING then don't reset. Leave the reset_pending
* flag set so that efx_pci_probe_main will be retried */
if (efx->state != STATE_RUNNING) {
EFX_INFO(efx, "scheduled reset quenched. NIC not RUNNING\n");
goto out_unlock;
}
int rc, rc2;
bool disabled;

EFX_INFO(efx, "resetting (%s)\n", RESET_TYPE(method));

Expand All @@ -1814,7 +1805,7 @@ static int efx_reset(struct efx_nic *efx)
rc = efx->type->reset(efx, method);
if (rc) {
EFX_ERR(efx, "failed to reset hardware\n");
goto out_disable;
goto out;
}

/* Allow resets to be rescheduled. */
Expand All @@ -1826,25 +1817,22 @@ static int efx_reset(struct efx_nic *efx)
* can respond to requests. */
pci_set_master(efx->pci_dev);

out:
/* Leave device stopped if necessary */
if (method == RESET_TYPE_DISABLE) {
efx_reset_up(efx, method, false);
rc = -EIO;
} else {
rc = efx_reset_up(efx, method, true);
disabled = rc || method == RESET_TYPE_DISABLE;
rc2 = efx_reset_up(efx, method, !disabled);
if (rc2) {
disabled = true;
if (!rc)
rc = rc2;
}

out_disable:
if (rc) {
if (disabled) {
EFX_ERR(efx, "has been disabled\n");
efx->state = STATE_DISABLED;
dev_close(efx->net_dev);
} else {
EFX_LOG(efx, "reset complete\n");
}

out_unlock:
rtnl_unlock();
return rc;
}

Expand All @@ -1853,9 +1841,19 @@ static int efx_reset(struct efx_nic *efx)
*/
static void efx_reset_work(struct work_struct *data)
{
struct efx_nic *nic = container_of(data, struct efx_nic, reset_work);
struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);

efx_reset(nic);
/* If we're not RUNNING then don't reset. Leave the reset_pending
* flag set so that efx_pci_probe_main will be retried */
if (efx->state != STATE_RUNNING) {
EFX_INFO(efx, "scheduled reset quenched. NIC not RUNNING\n");
return;
}

rtnl_lock();
if (efx_reset(efx, efx->reset_pending))
dev_close(efx->net_dev);
rtnl_unlock();
}

void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
Expand Down
1 change: 1 addition & 0 deletions drivers/net/sfc/efx.h
View file
Expand Up @@ -71,6 +71,7 @@ extern int efx_ethtool_set_settings(struct net_device *net_dev,
extern const struct ethtool_ops efx_ethtool_ops;

/* Reset handling */
extern int efx_reset(struct efx_nic *efx, enum reset_type method);
extern void efx_reset_down(struct efx_nic *efx, enum reset_type method);
extern int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);

Expand Down
30 changes: 30 additions & 0 deletions drivers/net/sfc/ethtool.c
View file
Expand Up @@ -754,6 +754,35 @@ static int efx_ethtool_set_wol(struct net_device *net_dev,
return efx->type->set_wol(efx, wol->wolopts);
}

extern int efx_ethtool_reset(struct net_device *net_dev, u32 *flags)
{
struct efx_nic *efx = netdev_priv(net_dev);
enum reset_type method;
enum {
ETH_RESET_EFX_INVISIBLE = (ETH_RESET_DMA | ETH_RESET_FILTER |
ETH_RESET_OFFLOAD | ETH_RESET_MAC)
};

/* Check for minimal reset flags */
if ((*flags & ETH_RESET_EFX_INVISIBLE) != ETH_RESET_EFX_INVISIBLE)
return -EINVAL;
*flags ^= ETH_RESET_EFX_INVISIBLE;
method = RESET_TYPE_INVISIBLE;

if (*flags & ETH_RESET_PHY) {
*flags ^= ETH_RESET_PHY;
method = RESET_TYPE_ALL;
}

if ((*flags & efx->type->reset_world_flags) ==
efx->type->reset_world_flags) {
*flags ^= efx->type->reset_world_flags;
method = RESET_TYPE_WORLD;
}

return efx_reset(efx, method);
}

const struct ethtool_ops efx_ethtool_ops = {
.get_settings = efx_ethtool_get_settings,
.set_settings = efx_ethtool_set_settings,
Expand Down Expand Up @@ -784,4 +813,5 @@ const struct ethtool_ops efx_ethtool_ops = {
.get_ethtool_stats = efx_ethtool_get_stats,
.get_wol = efx_ethtool_get_wol,
.set_wol = efx_ethtool_set_wol,
.reset = efx_ethtool_reset,
};
2 changes: 2 additions & 0 deletions drivers/net/sfc/falcon.c
View file
Expand Up @@ -3305,6 +3305,7 @@ struct efx_nic_type falcon_a1_nic_type = {
.phys_addr_channels = 4,
.tx_dc_base = 0x130000,
.rx_dc_base = 0x100000,
.reset_world_flags = ETH_RESET_IRQ,
};

struct efx_nic_type falcon_b0_nic_type = {
Expand Down Expand Up @@ -3348,5 +3349,6 @@ struct efx_nic_type falcon_b0_nic_type = {
* channels */
.tx_dc_base = 0x130000,
.rx_dc_base = 0x100000,
.reset_world_flags = ETH_RESET_IRQ,
};

3 changes: 3 additions & 0 deletions drivers/net/sfc/net_driver.h
View file
Expand Up @@ -880,6 +880,8 @@ static inline const char *efx_dev_name(struct efx_nic *efx)
* descriptors
* @tx_dc_base: Base address in SRAM of TX queue descriptor caches
* @rx_dc_base: Base address in SRAM of RX queue descriptor caches
* @reset_world_flags: Flags for additional components covered by
* reset method RESET_TYPE_WORLD
*/
struct efx_nic_type {
int (*probe)(struct efx_nic *efx);
Expand Down Expand Up @@ -915,6 +917,7 @@ struct efx_nic_type {
unsigned int phys_addr_channels;
unsigned int tx_dc_base;
unsigned int rx_dc_base;
u32 reset_world_flags;
};

/**************************************************************************
Expand Down

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