marvell:Add compilation support to driver

- Renamed the directory to oak - Updated the make files to compile the source - Removed unused script ESDP-16549 Bug 3882239 Bug 3824037 Change-Id: I1dee5def85b6e25f88dff999f1051bfe62d5613b Signed-off-by: Sheetal Tigadoli <stigadoli@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2856988 Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
2025-12-24 10:11:26 +03:00 · 2023-02-12 13:41:32 +00:00
parent afd05b80bd
commit 748fa9c699
36 changed files with 7 additions and 13 deletions
--- a/drivers/net/ethernet/marvell/oak/oak_chksum.c
+++ b/drivers/net/ethernet/marvell/oak/oak_chksum.c
@@ -0,0 +1,113 @@
+/*
+ *
+ * If you received this File from Marvell, you may opt to use, redistribute and/or
+ * modify this File in accordance with the terms and conditions of the General
+ * Public License Version 2, June 1991 (the "GPL License"), a copy of which is
+ * available along with the File in the license.txt file or by writing to the Free
+ * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
+ * on the worldwide web at http://www.gnu.org/licenses/gpl.txt.
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
+ * DISCLAIMED. The GPL License provides additional details about this warranty
+ * disclaimer.
+ *
+ */
+#include "oak_net.h"
+#include "oak_debug.h"
+#include "oak_chksum.h"
+
+/* Name        : oak_chksum_get_config
+ * Returns     : netdev_features_t
+ * Parameters  : void
+ * Description : This function provides Oak Hardware's Checksum Offload
+ *               capabilities
+ */
+netdev_features_t oak_chksum_get_config(void)
+{
+	netdev_features_t features = OAK_CHKSUM_TYPE;
+
+	/* Oak HW Supports L3 & L3 Checksum Offload and Freagmented frame,
+	 * so scatter gather need to be enabled.
+	 */
+	features |= NETIF_F_SG;
+
+	return features;
+}
+
+/* Name        : oak_chksum_get_tx_config
+ * Returns     : u32
+ * Parameters  : struct sk_buff *skb, u32 *cs_l3, u32 *cs_l4
+ * Description : This function returns the Checksum Offload configuration
+ *               for the transmit frame.
+ */
+u32 oak_chksum_get_tx_config(struct sk_buff *skb, u32 *cs_l3,
+			     u32 *cs_l4)
+{
+	u32 retval = 0;
+	int prot;
+
+	*cs_l3 = 0;
+	*cs_l4 = 0;
+
+	if (skb->ip_summed == CHECKSUM_PARTIAL) {
+		prot = oak_net_skb_tx_protocol_type(skb);
+		if (prot == L3_L4_CHKSUM) {
+			*cs_l3 = 1;
+			*cs_l4 = 1;
+		} else if (prot == L3_CHKSUM) {
+			*cs_l3 = 1;
+			*cs_l4 = 0;
+		} else {
+		/* Setting cs_l3 & cs_l4 to zero is done in error case after
+		 * this function returns.
+		 */
+			retval = 1;
+		}
+	} else {
+		retval = 1;
+	}
+
+	return retval;
+}
+
+/* Name        : oak_chksum_get_rx_config
+ * Returns     : u32
+ * Parameters  : struct oak_rx_chan_t *rxc, struct oak_rxs_t *rsr
+ * Description : This function returns the current receive frames
+ *               checksum state.
+ */
+int oak_chksum_get_rx_config(oak_rx_chan_t *rxc, oak_rxs_t *rsr)
+{
+	int retval = CHECKSUM_NONE;
+
+	if (rsr->vlan == 1)
+		++rxc->stat.rx_vlan;
+
+	if (rsr->l3_ipv4 == 1 || rsr->l3_ipv6 == 1) {
+		if (rsr->l4_prot == OAK_TCP_IP_FRAME ||
+		    rsr->l4_prot == OAK_TCP_UDP_FRAME) {
+			if (rsr->l4_chk_ok == 1) {
+				rxc->stat.rx_l4p_ok++;
+				retval = CHECKSUM_UNNECESSARY;
+			}
+		} else if (rsr->l3_ipv4 == 1 && rsr->ipv4_hdr_ok == 1) {
+		/*
+		 * Linux documentation for CHECKSUM_PARTIAL
+		 * in include/linux/skbuff.h this state may occur on a packet
+		 * received directly from another Linux OS,
+		 * e.g., a virtualized Linux kernel on the same host,
+		 * or it may be set in the input path in GRO or remote checksum
+		 * offload.
+		 * As per the discussion with the Linux kernel netdev forum
+		 * setting ip_summed to PARTIAL on receive is only valid
+		 * for software/virtual devices, never real HW.
+		 * For a frame where the checksum is not verified by the HW,
+		 * the flag will be set as CHECKSUM_NONE such that
+		 * linux netdev layer verifies the same.
+		 */
+			rxc->stat.rx_ip4_ok++;
+		}
+	}
+
+	return retval;
+}