ipq806x: fix missing tx/rx fifo depth gmac configuration

tx/rx-fifo-depth is required to set mtu to the gmac. Backport upstream patch.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-5.10/106-5.13-net-stmmac-Set-FIFO-sizes-for-ipq806x.patch b/target/linux/ipq806x/patches-5.10/106-5.13-net-stmmac-Set-FIFO-sizes-for-ipq806x.patch
new file mode 100644
index 0000000000..1da9e7e2b3
--- /dev/null
+++ b/target/linux/ipq806x/patches-5.10/106-5.13-net-stmmac-Set-FIFO-sizes-for-ipq806x.patch
@@ -0,0 +1,101 @@
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+Date: Sat, 13 Mar 2021 13:18:26 +0000
+From: Jonathan McDowell <noodles@earth.li>
+To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
+        Alexandre Torgue <alexandre.torgue@st.com>,
+        Jose Abreu <joabreu@synopsys.com>,
+        David Miller <davem@davemloft.net>,
+        Jakub Kicinski <kuba@kernel.org>,
+        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
+        netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
+        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
+Subject: [PATCH net-next] net: stmmac: Set FIFO sizes for ipq806x
+Message-ID: <20210313131826.GA17553@earth.li>
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+
+Commit eaf4fac47807 ("net: stmmac: Do not accept invalid MTU values")
+started using the TX FIFO size to verify what counts as a valid MTU
+request for the stmmac driver.  This is unset for the ipq806x variant.
+Looking at older patches for this it seems the RX + TXs buffers can be
+up to 8k, so set appropriately.
+
+(I sent this as an RFC patch in June last year, but received no replies.
+I've been running with this on my hardware (a MikroTik RB3011) since
+then with larger MTUs to support both the internal qca8k switch and
+VLANs with no problems. Without the patch it's impossible to set the
+larger MTU required to support this.)
+
+Signed-off-by: Jonathan McDowell <noodles@earth.li>
+---
+ drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
+index bf3250e0e59c..749585fe6fc9 100644
+--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
++++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
+@@ -352,6 +352,8 @@ static int ipq806x_gmac_probe(struct platform_device *pdev)
+ 	plat_dat->bsp_priv = gmac;
+ 	plat_dat->fix_mac_speed = ipq806x_gmac_fix_mac_speed;
+ 	plat_dat->multicast_filter_bins = 0;
++	plat_dat->tx_fifo_size = 8192;
++	plat_dat->rx_fifo_size = 8192;
+ 
+ 	err = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+ 	if (err)