net: ethernet: ti: davinci_cpdma: revert "drop frame padding"

This reverts commit 9ffc513f95ee ("net: ethernet: ti: davinci_cpdma: drop
frame padding") which has depndency from not yet merged patch [1] and so
breaks cpsw_new driver.

[1] https://patchwork.kernel.org/project/netdevbpf/patch/20210805145511.12016-1-grygorii.strashko@ti.com/
Fixes: 9ffc513f95ee ("net: ethernet: ti: davinci_cpdma: drop frame padding")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20210806142809.15069-1-grygorii.strashko@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/ti/cpsw_priv.c b/drivers/net/ethernet/ti/cpsw_priv.c
index d97a72c..ecc2a6b 100644 (file)
--- a/drivers/net/ethernet/ti/cpsw_priv.c
+++ b/drivers/net/ethernet/ti/cpsw_priv.c
@@ -518,6 +518,7 @@ int cpsw_init_common(struct cpsw_common *cpsw, void __iomem *ss_regs,
 
        dma_params.num_chan             = data->channels;
        dma_params.has_soft_reset       = true;
+       dma_params.min_packet_size      = CPSW_MIN_PACKET_SIZE;
        dma_params.desc_mem_size        = data->bd_ram_size;
        dma_params.desc_align           = 16;
        dma_params.has_ext_regs         = true;

diff --git a/drivers/net/ethernet/ti/davinci_cpdma.c b/drivers/net/ethernet/ti/davinci_cpdma.c
index 753d94c..d2eab5c 100644 (file)
--- a/drivers/net/ethernet/ti/davinci_cpdma.c
+++ b/drivers/net/ethernet/ti/davinci_cpdma.c
@@ -1034,6 +1034,11 @@ static int cpdma_chan_submit_si(struct submit_info *si)
                return -ENOMEM;
        }
 
+       if (len < ctlr->params.min_packet_size) {
+               len = ctlr->params.min_packet_size;
+               chan->stats.runt_transmit_buff++;
+       }
+
        mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
        cpdma_desc_to_port(chan, mode, si->directed);
 

diff --git a/drivers/net/ethernet/ti/davinci_cpdma.h b/drivers/net/ethernet/ti/davinci_cpdma.h
index 62151f1..d3cfe23 100644 (file)
--- a/drivers/net/ethernet/ti/davinci_cpdma.h
+++ b/drivers/net/ethernet/ti/davinci_cpdma.h
@@ -26,6 +26,7 @@ struct cpdma_params {
        void __iomem            *rxthresh, *rxfree;
        int                     num_chan;
        bool                    has_soft_reset;
+       int                     min_packet_size;
        dma_addr_t              desc_mem_phys;
        dma_addr_t              desc_hw_addr;
        int                     desc_mem_size;

diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index cd2ef02..b1c5cbe 100644 (file)
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1850,6 +1850,7 @@ static int davinci_emac_probe(struct platform_device *pdev)
        dma_params.txcp                 = priv->emac_base + 0x640;
        dma_params.rxcp                 = priv->emac_base + 0x660;
        dma_params.num_chan             = EMAC_MAX_TXRX_CHANNELS;
+       dma_params.min_packet_size      = EMAC_DEF_MIN_ETHPKTSIZE;
        dma_params.desc_hw_addr         = hw_ram_addr;
        dma_params.desc_mem_size        = pdata->ctrl_ram_size;
        dma_params.desc_align           = 16;