netdev - [PATCH v2 net-next 14/16] sfc_ef100: populate BUFFER_SIZE_BYTES in INIT

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Date:   Thu, 2 Jul 2020 17:32:24 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     <linux-net-drivers@...arflare.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>
Subject: [PATCH v2 net-next 14/16] sfc_ef100: populate BUFFER_SIZE_BYTES in
 INIT_RXQ

The QDMA subsystem on EF100 needs this information.

Signed-off-by: Edward Cree <ecree@...arflare.com>
---
 drivers/net/ethernet/sfc/mcdi_functions.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/sfc/mcdi_functions.c b/drivers/net/ethernet/sfc/mcdi_functions.c
index 92b9a741c286..d8a3af86ef78 100644
--- a/drivers/net/ethernet/sfc/mcdi_functions.c
+++ b/drivers/net/ethernet/sfc/mcdi_functions.c
@@ -267,20 +267,22 @@ int efx_mcdi_rx_probe(struct efx_rx_queue *rx_queue)
 
 void efx_mcdi_rx_init(struct efx_rx_queue *rx_queue)
 {
-	MCDI_DECLARE_BUF(inbuf,
-			 MC_CMD_INIT_RXQ_IN_LEN(EFX_MAX_DMAQ_SIZE * 8 /
-						EFX_BUF_SIZE));
 	struct efx_channel *channel = efx_rx_queue_channel(rx_queue);
 	size_t entries = rx_queue->rxd.buf.len / EFX_BUF_SIZE;
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_INIT_RXQ_V4_IN_LEN);
 	struct efx_nic *efx = rx_queue->efx;
+	unsigned int buffer_size;
 	dma_addr_t dma_addr;
-	size_t inlen;
 	int rc;
 	int i;
 	BUILD_BUG_ON(MC_CMD_INIT_RXQ_OUT_LEN != 0);
 
 	rx_queue->scatter_n = 0;
 	rx_queue->scatter_len = 0;
+	if (efx->type->revision == EFX_REV_EF100)
+		buffer_size = efx->rx_page_buf_step;
+	else
+		buffer_size = 0;
 
 	MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_SIZE, rx_queue->ptr_mask + 1);
 	MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_TARGET_EVQ, channel->channel);
@@ -292,6 +294,7 @@ void efx_mcdi_rx_init(struct efx_rx_queue *rx_queue)
 			      INIT_RXQ_IN_FLAG_TIMESTAMP, 1);
 	MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_OWNER_ID, 0);
 	MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_PORT_ID, efx->vport_id);
+	MCDI_SET_DWORD(inbuf, INIT_RXQ_V4_IN_BUFFER_SIZE_BYTES, buffer_size);
 
 	dma_addr = rx_queue->rxd.buf.dma_addr;
 
@@ -303,9 +306,7 @@ void efx_mcdi_rx_init(struct efx_rx_queue *rx_queue)
 		dma_addr += EFX_BUF_SIZE;
 	}
 
-	inlen = MC_CMD_INIT_RXQ_IN_LEN(entries);
-
-	rc = efx_mcdi_rpc(efx, MC_CMD_INIT_RXQ, inbuf, inlen,
+	rc = efx_mcdi_rpc(efx, MC_CMD_INIT_RXQ, inbuf, sizeof(inbuf),
 			  NULL, 0, NULL);
 	if (rc)
 		netdev_WARN(efx->net_dev, "failed to initialise RXQ %d\n",