diff options
| author | Daire McNamara <daire.mcnamara@microchip.com> | 2023-05-12 13:20:32 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-05-13 20:46:38 +0100 |
| commit | 314cf958de2a784dd3984190311e15aa1fbf2717 (patch) | |
| tree | adcb38df3ce138f07ffb1d10dcedb126a6465f5b | |
| parent | f1b5dfe63f6a9eb17948cbaee4da4b66f51ac794 (diff) | |
| download | linux-314cf958de2a784dd3984190311e15aa1fbf2717.tar.gz linux-314cf958de2a784dd3984190311e15aa1fbf2717.tar.bz2 linux-314cf958de2a784dd3984190311e15aa1fbf2717.zip | |
net: macb: Shorten max_tx_len to 4KiB - 56 on mpfs
On mpfs, with SRAM configured for 4 queues, setting max_tx_len
to GEM_TX_MAX_LEN=0x3f0 results multiple AMBA errors.
Setting max_tx_len to (4KiB - 56) removes those errors.
The details are described in erratum 1686 by Cadence
The max jumbo frame size is also reduced for mpfs to (4KiB - 56).
Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 12 |
2 files changed, 10 insertions, 3 deletions
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h index cfbdd0022764..b6d5bf8deb79 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -1181,6 +1181,7 @@ struct macb_config { struct clk **hclk, struct clk **tx_clk, struct clk **rx_clk, struct clk **tsu_clk); int (*init)(struct platform_device *pdev); + unsigned int max_tx_length; int jumbo_max_len; const struct macb_usrio_config *usrio; }; diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 29a1199dad14..50a4b04315e9 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -4117,14 +4117,12 @@ static int macb_init(struct platform_device *pdev) /* setup appropriated routines according to adapter type */ if (macb_is_gem(bp)) { - bp->max_tx_length = GEM_MAX_TX_LEN; bp->macbgem_ops.mog_alloc_rx_buffers = gem_alloc_rx_buffers; bp->macbgem_ops.mog_free_rx_buffers = gem_free_rx_buffers; bp->macbgem_ops.mog_init_rings = gem_init_rings; bp->macbgem_ops.mog_rx = gem_rx; dev->ethtool_ops = &gem_ethtool_ops; } else { - bp->max_tx_length = MACB_MAX_TX_LEN; bp->macbgem_ops.mog_alloc_rx_buffers = macb_alloc_rx_buffers; bp->macbgem_ops.mog_free_rx_buffers = macb_free_rx_buffers; bp->macbgem_ops.mog_init_rings = macb_init_rings; @@ -4861,7 +4859,8 @@ static const struct macb_config mpfs_config = { .clk_init = macb_clk_init, .init = init_reset_optional, .usrio = &macb_default_usrio, - .jumbo_max_len = 10240, + .max_tx_length = 4040, /* Cadence Erratum 1686 */ + .jumbo_max_len = 4040, }; static const struct macb_config sama7g5_gem_config = { @@ -5012,6 +5011,13 @@ static int macb_probe(struct platform_device *pdev) if (macb_config) bp->jumbo_max_len = macb_config->jumbo_max_len; + if (!hw_is_gem(bp->regs, bp->native_io)) + bp->max_tx_length = MACB_MAX_TX_LEN; + else if (macb_config->max_tx_length) + bp->max_tx_length = macb_config->max_tx_length; + else + bp->max_tx_length = GEM_MAX_TX_LEN; + bp->wol = 0; if (of_property_read_bool(np, "magic-packet")) bp->wol |= MACB_WOL_HAS_MAGIC_PACKET; |