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-From patchwork Sat Mar 13 13:18:26 2021
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-Date: Sat, 13 Mar 2021 13:18:26 +0000
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-From: Jonathan McDowell <[email protected]>
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-To: Giuseppe Cavallaro <[email protected]>,
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-Subject: [PATCH net-next] net: stmmac: Set FIFO sizes for ipq806x
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-
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-Commit eaf4fac47807 ("net: stmmac: Do not accept invalid MTU values")
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-started using the TX FIFO size to verify what counts as a valid MTU
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-request for the stmmac driver. This is unset for the ipq806x variant.
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-Looking at older patches for this it seems the RX + TXs buffers can be
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-up to 8k, so set appropriately.
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-
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-(I sent this as an RFC patch in June last year, but received no replies.
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-I've been running with this on my hardware (a MikroTik RB3011) since
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-then with larger MTUs to support both the internal qca8k switch and
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-VLANs with no problems. Without the patch it's impossible to set the
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-larger MTU required to support this.)
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-
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-Signed-off-by: Jonathan McDowell <[email protected]>
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----
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- drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c | 2 ++
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- 1 file changed, 2 insertions(+)
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-
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---- a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
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-+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
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-@@ -405,6 +405,8 @@ static int ipq806x_gmac_probe(struct pla
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- plat_dat->bsp_priv = gmac;
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- plat_dat->fix_mac_speed = ipq806x_gmac_fix_mac_speed;
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- plat_dat->multicast_filter_bins = 0;
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-+ plat_dat->tx_fifo_size = 8192;
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-+ plat_dat->rx_fifo_size = 8192;
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-
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- err = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
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- if (err)
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