forcedeth: remove msix + napi
Subsystems (2)
PATCH 3/13 forcedeth: remove msix + napi
This patch removes support for msix running in conjunction with napi. There has been reported issues regarding the behaviour of irqmask and generation of interrupts by the HW when in MSIX mode. When running napi, the driver is constantly turning off/on the irqmask. For the time being, I am going to disable it until I can root cause the issue.
Signed-off-by Ayaz Abdulla <[email protected]>
drivers/net/forcedeth.c +5 -21
@@ -3731,26 +3731,6 @@ }#endif -#ifdef CONFIG_FORCEDETH_NAPI -static irqreturn_t nv_nic_irq_rx (int foo,void *data) -{ -struct net_device *dev = (struct net_device *) data; -struct fe_priv *np =netdev_priv (dev); -u8 __iomem *base =get_hwbase (dev); -u32 events; - - events =readl (base + NvRegMSIXIrqStatus) &NVREG_IRQ_RX_ALL ; - -if (events) { -/* disable receive interrupts on the nic */ -writel (NVREG_IRQ_RX_ALL , base + NvRegIrqMask); -pci_push (base); -writel (NVREG_IRQ_RX_ALL , base + NvRegMSIXIrqStatus); -napi_schedule (&np->napi); - } -return IRQ_HANDLED ; -} -#else static irqreturn_t nv_nic_irq_rx (int foo,void *data) {struct net_device *dev = (struct net_device *) data;
@@ -3797,7 +3777,6 @@return IRQ_RETVAL (i); } -#endif static irqreturn_t nv_nic_irq_other (int foo,void *data) {
@@ -5670,7 +5649,12 @@ np->msi_flags |=NV_MSI_CAPABLE ; }if ((id->driver_data &DEV_HAS_MSI_X ) && msix) { +/* msix has had reported issues when modifying irqmask +as in the case of napi, therefore, disable for now +*/ +#ifndef CONFIG_FORCEDETH_NAPI np->msi_flags |=NV_MSI_X_CAPABLE ; +#endif } np->pause_flags =NV_PAUSEFRAME_RX_CAPABLE |NV_PAUSEFRAME_RX_REQ |NV_PAUSEFRAME_AUTONEG ;