diff options
| author |   Biju Das <biju.das.jz@bp.renesas.com> | 2021-10-12 17:36:01 +0100 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2021-10-13 09:08:55 -0700 |
| commit | 2e95e08ac009273184c259848851d495258448c2 (patch) | |
| tree | a84288fa2aff3d3afdcdfec4e6609593756cd8a7 /drivers/net/ethernet/renesas | |
| parent | ravb: Use ALIGN macro for max_rx_len (diff) | |
| download | linux-dev-2e95e08ac009273184c259848851d495258448c2.tar.xz linux-dev-2e95e08ac009273184c259848851d495258448c2.zip | |
ravb: Add rx_max_buf_size to struct ravb_hw_info
R-Car AVB-DMAC has maximum 2K size on RX buffer, whereas on RZ/G2L
it is 8K. We need to allow for changing the MTU within the limit
of the maximum size of a descriptor.
Add a rx_max_buf_size variable to struct ravb_hw_info to handle
this difference.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/renesas')
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb_main.c | 5 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index 5dc1324786e0..b147c4a0dc0b 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -1010,6 +1010,7 @@ struct ravb_hw_info { int stats_len; size_t max_rx_len; u32 tsrq; + u32 rx_max_buf_size; unsigned aligned_tx: 1; /* hardware features */ diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 0e3cda1140e5..fe3449fb4135 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2188,6 +2188,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = { .stats_len = ARRAY_SIZE(ravb_gstrings_stats), .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1, .tsrq = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3, + .rx_max_buf_size = SZ_2K, .internal_delay = 1, .tx_counters = 1, .multi_irqs = 1, @@ -2212,6 +2213,7 @@ static const struct ravb_hw_info ravb_gen2_hw_info = { .stats_len = ARRAY_SIZE(ravb_gstrings_stats), .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1, .tsrq = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3, + .rx_max_buf_size = SZ_2K, .aligned_tx = 1, .gptp = 1, .nc_queue = 1, @@ -2229,6 +2231,7 @@ static const struct ravb_hw_info gbeth_hw_info = { .emac_init = ravb_emac_init_gbeth, .max_rx_len = ALIGN(GBETH_RX_BUFF_MAX, RAVB_ALIGN), .tsrq = TCCR_TSRQ0, + .rx_max_buf_size = SZ_8K, .aligned_tx = 1, .tx_counters = 1, .half_duplex = 1, @@ -2452,7 +2455,7 @@ static int ravb_probe(struct platform_device *pdev) } clk_prepare_enable(priv->refclk); - ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN); + ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN); ndev->min_mtu = ETH_MIN_MTU; /* FIXME: R-Car Gen2 has 4byte alignment restriction for tx buffer |