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Date: Thu, 22 Aug 2013 20:26:08 +0100
From: Ben Hutchings <bhutchings@...arflare.com>
To: David Miller <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <linux-net-drivers@...arflare.com>
Subject: [PATCH RESEND net-next 04/16] sfc: Move details of a Falcon bug
workaround out of ethtool.c
Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
drivers/net/ethernet/sfc/ethtool.c | 23 ++++-------------------
drivers/net/ethernet/sfc/falcon.c | 26 +++++++++++++++++++++++++-
drivers/net/ethernet/sfc/net_driver.h | 2 ++
drivers/net/ethernet/sfc/nic.h | 1 -
drivers/net/ethernet/sfc/workarounds.h | 2 --
5 files changed, 31 insertions(+), 23 deletions(-)
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index 1fc2145..4db37f7 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -709,7 +709,6 @@ static int efx_ethtool_set_pauseparam(struct net_device *net_dev,
struct efx_nic *efx = netdev_priv(net_dev);
u8 wanted_fc, old_fc;
u32 old_adv;
- bool reset;
int rc = 0;
mutex_lock(&efx->mac_lock);
@@ -732,24 +731,10 @@ static int efx_ethtool_set_pauseparam(struct net_device *net_dev,
goto out;
}
- /* TX flow control may automatically turn itself off if the
- * link partner (intermittently) stops responding to pause
- * frames. There isn't any indication that this has happened,
- * so the best we do is leave it up to the user to spot this
- * and fix it be cycling transmit flow control on this end. */
- reset = (wanted_fc & EFX_FC_TX) && !(efx->wanted_fc & EFX_FC_TX);
- if (EFX_WORKAROUND_11482(efx) && reset) {
- if (efx_nic_rev(efx) == EFX_REV_FALCON_B0) {
- /* Recover by resetting the EM block */
- falcon_stop_nic_stats(efx);
- falcon_drain_tx_fifo(efx);
- falcon_reconfigure_xmac(efx);
- falcon_start_nic_stats(efx);
- } else {
- /* Schedule a reset to recover */
- efx_schedule_reset(efx, RESET_TYPE_INVISIBLE);
- }
- }
+ /* Hook for Falcon bug 11482 workaround */
+ if (efx->type->prepare_enable_fc_tx &&
+ (wanted_fc & EFX_FC_TX) && !(efx->wanted_fc & EFX_FC_TX))
+ efx->type->prepare_enable_fc_tx(efx);
old_adv = efx->link_advertising;
old_fc = efx->wanted_fc;
diff --git a/drivers/net/ethernet/sfc/falcon.c b/drivers/net/ethernet/sfc/falcon.c
index 71998e7..6b6ac6d 100644
--- a/drivers/net/ethernet/sfc/falcon.c
+++ b/drivers/net/ethernet/sfc/falcon.c
@@ -497,7 +497,7 @@ static void falcon_reset_macs(struct efx_nic *efx)
falcon_setup_xaui(efx);
}
-void falcon_drain_tx_fifo(struct efx_nic *efx)
+static void falcon_drain_tx_fifo(struct efx_nic *efx)
{
efx_oword_t reg;
@@ -678,6 +678,28 @@ static int falcon_reconfigure_port(struct efx_nic *efx)
return 0;
}
+/* TX flow control may automatically turn itself off if the link
+ * partner (intermittently) stops responding to pause frames. There
+ * isn't any indication that this has happened, so the best we do is
+ * leave it up to the user to spot this and fix it by cycling transmit
+ * flow control on this end.
+ */
+
+static void falcon_a1_prepare_enable_fc_tx(struct efx_nic *efx)
+{
+ /* Schedule a reset to recover */
+ efx_schedule_reset(efx, RESET_TYPE_INVISIBLE);
+}
+
+static void falcon_b0_prepare_enable_fc_tx(struct efx_nic *efx)
+{
+ /* Recover by resetting the EM block */
+ falcon_stop_nic_stats(efx);
+ falcon_drain_tx_fifo(efx);
+ falcon_reconfigure_xmac(efx);
+ falcon_start_nic_stats(efx);
+}
+
/**************************************************************************
*
* PHY access via GMII
@@ -1798,6 +1820,7 @@ const struct efx_nic_type falcon_a1_nic_type = {
.set_id_led = falcon_set_id_led,
.push_irq_moderation = falcon_push_irq_moderation,
.reconfigure_port = falcon_reconfigure_port,
+ .prepare_enable_fc_tx = falcon_a1_prepare_enable_fc_tx,
.reconfigure_mac = falcon_reconfigure_xmac,
.check_mac_fault = falcon_xmac_check_fault,
.get_wol = falcon_get_wol,
@@ -1842,6 +1865,7 @@ const struct efx_nic_type falcon_b0_nic_type = {
.set_id_led = falcon_set_id_led,
.push_irq_moderation = falcon_push_irq_moderation,
.reconfigure_port = falcon_reconfigure_port,
+ .prepare_enable_fc_tx = falcon_b0_prepare_enable_fc_tx,
.reconfigure_mac = falcon_reconfigure_xmac,
.check_mac_fault = falcon_xmac_check_fault,
.get_wol = falcon_get_wol,
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index f4c7e6b..bdded38 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -946,6 +946,7 @@ static inline unsigned int efx_port_num(struct efx_nic *efx)
* @set_id_led: Set state of identifying LED or revert to automatic function
* @push_irq_moderation: Apply interrupt moderation value
* @reconfigure_port: Push loopback/power/txdis changes to the MAC and PHY
+ * @prepare_enable_fc_tx: Prepare MAC to enable pause frame TX (may be %NULL)
* @reconfigure_mac: Push MAC address, MTU, flow control and filter settings
* to the hardware. Serialised by the mac_lock.
* @check_mac_fault: Check MAC fault state. True if fault present.
@@ -995,6 +996,7 @@ struct efx_nic_type {
void (*set_id_led)(struct efx_nic *efx, enum efx_led_mode mode);
void (*push_irq_moderation)(struct efx_channel *channel);
int (*reconfigure_port)(struct efx_nic *efx);
+ void (*prepare_enable_fc_tx)(struct efx_nic *efx);
int (*reconfigure_mac)(struct efx_nic *efx);
bool (*check_mac_fault)(struct efx_nic *efx);
void (*get_wol)(struct efx_nic *efx, struct ethtool_wolinfo *wol);
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index d63c299..a784363 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -298,7 +298,6 @@ extern void efx_nic_eventq_read_ack(struct efx_channel *channel);
extern bool efx_nic_event_present(struct efx_channel *channel);
/* MAC/PHY */
-extern void falcon_drain_tx_fifo(struct efx_nic *efx);
extern void falcon_reconfigure_mac_wrapper(struct efx_nic *efx);
extern bool falcon_xmac_check_fault(struct efx_nic *efx);
extern int falcon_reconfigure_xmac(struct efx_nic *efx);
diff --git a/drivers/net/ethernet/sfc/workarounds.h b/drivers/net/ethernet/sfc/workarounds.h
index e4dd3a7..dff565a 100644
--- a/drivers/net/ethernet/sfc/workarounds.h
+++ b/drivers/net/ethernet/sfc/workarounds.h
@@ -30,8 +30,6 @@
/* TX_EV_PKT_ERR can be caused by a dangling TX descriptor
* or a PCIe error (bug 11028) */
#define EFX_WORKAROUND_10727 EFX_WORKAROUND_ALWAYS
-/* Transmit flow control may get disabled */
-#define EFX_WORKAROUND_11482 EFX_WORKAROUND_FALCON_AB
/* Truncated IPv4 packets can confuse the TX packet parser */
#define EFX_WORKAROUND_15592 EFX_WORKAROUND_FALCON_AB
/* Legacy ISR read can return zero once */
--
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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