sfc: get timer configuration from adapter
On SFN8000 series adapters the MC provides a method to get the timer
quantum and the maximum timer setting. We revert to the old values if the
new call is unavailable.
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index b26e1f9..f3826ae 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1979,12 +1979,13 @@
bool rx_may_override_tx)
{
struct efx_channel *channel;
- unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max *
- efx->timer_quantum_ns,
- 1000);
+ unsigned int timer_max_us;
+
EFX_ASSERT_RESET_SERIALISED(efx);
- if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max)
+ timer_max_us = efx->timer_max_ns / 1000;
+
+ if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
return -EINVAL;
if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&