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net: ll_temac: Allow configuration of IRQ coalescing

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This allows custom setup of IRQ coalescing for platforms using legacy
platform_device. The irq timeout and count parameters can be used for
tuning cpu load vs. latency.

I have maintained the 0x00000400 bit in TX_CHNL_CTRL.  It is specified as
unused in the documentation I have available.  It does not make any
difference in the hardware I have available, so it is left in to not risk
breaking other platforms where it might be used.

Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Esben Haabendal
2019-04-30 09:17:58 +02:00
committed by David S. Miller
parent 901d14ab55
commit 7e97a194ac
3 changed files with 37 additions and 12 deletions
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5
include/linux/platform_data/xilinx-ll-temac.h
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@@ -22,6 +22,11 @@ struct ll_temac_platform_data {
* they share the same DCR bus bridge.
*/
struct mutex *indirect_mutex;
/* DMA channel control setup */
u8 tx_irq_timeout; /* TX Interrupt Delay Time-out */
u8 tx_irq_count; /* TX Interrupt Coalescing Threshold Count */
u8 rx_irq_timeout; /* RX Interrupt Delay Time-out */
u8 rx_irq_count; /* RX Interrupt Coalescing Threshold Count */
};
#endif /* __LINUX_XILINX_LL_TEMAC_H */