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| author | Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2012-11-25 23:10:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-26 17:22:12 -0500 |
| commit | 62a2ab935c8d0f8643d02d3696abc401b5da6206 (patch) | |
| tree | 621848d4f395f224faa16e576d5f5b93a63f01a2 /include/linux/stmmac.h | |
| parent | 9125cdd1be1199588f71c99e76e32bcda0b7d847 (diff) | |
| download | linux-next-62a2ab935c8d0f8643d02d3696abc401b5da6206.tar.gz | |
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>
Diffstat (limited to 'include/linux/stmmac.h')
| -rw-r--r-- | include/linux/stmmac.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index a1547ea3920d..de5b2f8176ce 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -104,6 +104,7 @@ struct plat_stmmacenet_data { int bugged_jumbo; int pmt; int force_sf_dma_mode; + int riwt_off; void (*fix_mac_speed)(void *priv, unsigned int speed); void (*bus_setup)(void __iomem *ioaddr); int (*init)(struct platform_device *pdev); |