Giuseppe CAVALLARO 62a2ab935c stmmac: add Rx watchdog support to mitigate the DMA irqs ... GMAC devices newer than databook 3.40 has an embedded timer that can be used for mitigating the number of interrupts. So this patch adds this optimizations. At any rate, the Rx watchdog can be disable (on bugged HW) by passing from the platform the riwt_off field. In this implementation the rx timer stored in the Reg9 is fixed to the max value. This will be tuned by using ethtool. V2: added a platform parameter to force to disable the rx-watchdog for example on new core where it is bugged. V3: do not disable NAPI when Rx watchdog is used. V4: a new extra statistic field has been added to show the early receive status in the interrupt handler. This patch also adds an extra check to avoid to call napi_schedule when the DMA_INTR_ENA_RIE bit is disabled in the Interrupt Mask register. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2012-11-26 17:22:12 -05:00
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stmmac	stmmac: add Rx watchdog support to mitigate the DMA irqs	2012-11-26 17:22:12 -05:00
Kconfig	drivers/net/ethernet/*: Enabled vendor Kconfig options	2011-08-27 00:58:56 -07:00
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