Commit 18ff09c1 authored by Florian Fainelli's avatar Florian Fainelli Committed by Jakub Kicinski
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net: bcmasp: Restore programming of TX map vector register 



On ASP versions v2.x we need to program the TX map vector register to
properly exercise end-to-end flow control, otherwise the TX engine can
either lock-up, or cause the hardware calculated checksum to be
wrong/corrupted when multiple back to back packets are being submitted
for transmission. This register defaults to 0, which means no flow
control being applied.

Fixes: e9f31435 ("net: bcmasp: Add support for asp-v3.0")
Signed-off-by: default avatarFlorian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20250718212242.3447751-1-florian.fainelli@broadcom.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 53b2fb6b

drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c

+3 −0
Original line number Diff line number Diff line
@@ -818,6 +818,9 @@ static void bcmasp_init_tx(struct bcmasp_intf *intf) 
	/* Tx SPB */

	tx_spb_ctrl_wl(intf, ((intf->channel + 8) << TX_SPB_CTRL_XF_BID_SHIFT),

		       TX_SPB_CTRL_XF_CTRL2);



	if (intf->parent->tx_chan_offset)

		tx_pause_ctrl_wl(intf, (1 << (intf->channel + 8)), TX_PAUSE_MAP_VECTOR);

	tx_spb_top_wl(intf, 0x1e, TX_SPB_TOP_BLKOUT);



	tx_spb_dma_wq(intf, intf->tx_spb_dma_addr, TX_SPB_DMA_READ);