[Linux-stm32] [v5, PATCH] net: stmmac: add support for hash table size 128/256 in dwmac4

[biao huang]

Hi Jose,
	I also try "ethtool -A eth0 tx on rx on", and selftests pass.

	But there are bugs in dwmac4_flow_ctrl:
		flow control will keep on once enabled. 
		ethtool -A eth0 tx off rx off can't change it.

	if (fc & FLOW_RX)  {
		pr_debug ...
		flow |= GMAC_RX_FLOW_CTRL_RFE;
		writel(flow, ioaddr + GMAC_RX_FLOW_CTRL);
		>> this should move outside to enasure rx flow control will be off
when execute "ethtool -A eth0 rx off"
	} 

	same for tx.

On Wed, 2019-05-29 at 10:30 +0000, Jose Abreu wrote:
> From: Biao Huang <biao.huang at mediatek.com>
> Date: Wed, May 29, 2019 at 10:31:08
> 
> > 1. get hash table size in hw feature reigster, and add support
> > for taller hash table(128/256) in dwmac4.
> > 2. only clear GMAC_PACKET_FILTER bits used in this function,
> > to avoid side effect to functions of other bits.
> > 
> > stmmac selftests output log:
> > 	ethtool -t eth0
> > 	The test result is FAIL
> > 	The test extra info:
> > 	 1. MAC Loopback                 0
> > 	 2. PHY Loopback                 -95
> > 	 3. MMC Counters                 0
> > 	 4. EEE                          -95
> > 	 5. Hash Filter MC               0
> > 	 6. Perfect Filter UC            0
> > 	 7. MC Filter                    0
> > 	 8. UC Filter                    0
> > 	 9. Flow Control                 1
> 
> Thanks for testing, this patch looks good to me.
> 
> Do you want to check why Flow Control selftest is failing ?
> 
> 
> Thanks,
> Jose Miguel Abreu