net/i40e: fix Rx data buffer size

[ upstream commit ff2ec0ce04739240205628207881a91e1e330cb7 ] According to hardware spec, the data buffer size should not be greater than 16K - 128. Fixes: 4861cde ("i40e: new poll mode driver") Signed-off-by: Wenjun Wu <wenjun1.wu@intel.com> Acked-by: Qi Zhang <qi.z.zhang@intel.com>
kevintraynor · Jul 11, 2023 · d5755af · d5755af
1 parent 1173611
commit d5755af
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diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
@@ -2904,6 +2904,8 @@ i40e_rx_queue_config(struct i40e_rx_queue *rxq)
 		rxq->rx_hdr_len = 0;
 		rxq->rx_buf_len = RTE_ALIGN_FLOOR(buf_size,
 			(1 << I40E_RXQ_CTX_DBUFF_SHIFT));
+		rxq->rx_buf_len = RTE_MIN(rxq->rx_buf_len,
+					  I40E_RX_MAX_DATA_BUF_SIZE);
 		rxq->hs_mode = i40e_header_split_none;
 		break;
 	}

diff --git a/drivers/net/i40e/i40e_rxtx.h b/drivers/net/i40e/i40e_rxtx.h
@@ -21,6 +21,9 @@
 /* In none-PXE mode QLEN must be whole number of 32 descriptors. */
 #define	I40E_ALIGN_RING_DESC	32
 
+/* Max data buffer size must be 16K - 128 bytes */
+#define I40E_RX_MAX_DATA_BUF_SIZE	(16 * 1024 - 128)
+
 #define	I40E_MIN_RING_DESC	64
 #define	I40E_MAX_RING_DESC	4096