ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/net/core/tso.c b/marvell/linux/net/core/tso.c
new file mode 100644
index 0000000..d4d5c07
--- /dev/null
+++ b/marvell/linux/net/core/tso.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/export.h>
+#include <linux/if_vlan.h>
+#include <net/ip.h>
+#include <net/tso.h>
+#include <asm/unaligned.h>
+
+/* Calculate expected number of TX descriptors */
+int tso_count_descs(struct sk_buff *skb)
+{
+ /* The Marvell Way */
+ return skb_shinfo(skb)->gso_segs * 2 + skb_shinfo(skb)->nr_frags;
+}
+EXPORT_SYMBOL(tso_count_descs);
+
+void tso_build_hdr(struct sk_buff *skb, char *hdr, struct tso_t *tso,
+ int size, bool is_last)
+{
+ struct tcphdr *tcph;
+ int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ int mac_hdr_len = skb_network_offset(skb);
+
+ memcpy(hdr, skb->data, hdr_len);
+ if (!tso->ipv6) {
+ struct iphdr *iph = (void *)(hdr + mac_hdr_len);
+
+ iph->id = htons(tso->ip_id);
+ iph->tot_len = htons(size + hdr_len - mac_hdr_len);
+ tso->ip_id++;
+ } else {
+ struct ipv6hdr *iph = (void *)(hdr + mac_hdr_len);
+
+ iph->payload_len = htons(size + tcp_hdrlen(skb));
+ }
+ tcph = (struct tcphdr *)(hdr + skb_transport_offset(skb));
+ put_unaligned_be32(tso->tcp_seq, &tcph->seq);
+
+ if (!is_last) {
+ /* Clear all special flags for not last packet */
+ tcph->psh = 0;
+ tcph->fin = 0;
+ tcph->rst = 0;
+ }
+}
+EXPORT_SYMBOL(tso_build_hdr);
+
+void tso_build_data(struct sk_buff *skb, struct tso_t *tso, int size)
+{
+ tso->tcp_seq += size;
+ tso->size -= size;
+ tso->data += size;
+
+ if ((tso->size == 0) &&
+ (tso->next_frag_idx < skb_shinfo(skb)->nr_frags)) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[tso->next_frag_idx];
+
+ /* Move to next segment */
+ tso->size = skb_frag_size(frag);
+ tso->data = skb_frag_address(frag);
+ tso->next_frag_idx++;
+ }
+}
+EXPORT_SYMBOL(tso_build_data);
+
+void tso_start(struct sk_buff *skb, struct tso_t *tso)
+{
+ int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+
+ tso->ip_id = ntohs(ip_hdr(skb)->id);
+ tso->tcp_seq = ntohl(tcp_hdr(skb)->seq);
+ tso->next_frag_idx = 0;
+ tso->ipv6 = vlan_get_protocol(skb) == htons(ETH_P_IPV6);
+
+ /* Build first data */
+ tso->size = skb_headlen(skb) - hdr_len;
+ tso->data = skb->data + hdr_len;
+ if ((tso->size == 0) &&
+ (tso->next_frag_idx < skb_shinfo(skb)->nr_frags)) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[tso->next_frag_idx];
+
+ /* Move to next segment */
+ tso->size = skb_frag_size(frag);
+ tso->data = skb_frag_address(frag);
+ tso->next_frag_idx++;
+ }
+}
+EXPORT_SYMBOL(tso_start);