1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
10 #include "iwl-drv.h"
11 #include "iwl-utils.h"
19 	struct ieee80211_hdr *hdr = (void *)skb->data;  in iwl_tx_tso_segment()
20 	char cb[sizeof(skb->cb)];  in iwl_tx_tso_segment()  local
23 	unsigned int mss = skb_shinfo(skb)->gso_size;  in iwl_tx_tso_segment()
24 	bool ipv4 = (skb->protocol == htons(ETH_P_IP));  in iwl_tx_tso_segment()
25 	bool qos = ieee80211_is_data_qos(hdr->frame_control);  in iwl_tx_tso_segment()
26 	u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;  in iwl_tx_tso_segment()
28 	skb_shinfo(skb)->gso_size = num_subframes * mss;  in iwl_tx_tso_segment()
29 	memcpy(cb, skb->cb, sizeof(cb));  in iwl_tx_tso_segment()
32 	skb_shinfo(skb)->gso_size = mss;  in iwl_tx_tso_segment()
33 	skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;  in iwl_tx_tso_segment()
35 	if (IS_ERR(next) && PTR_ERR(next) == -ENOMEM)  in iwl_tx_tso_segment()
36 		return -ENOMEM;  in iwl_tx_tso_segment()
46 		memcpy(tmp->cb, cb, sizeof(tmp->cb));  in iwl_tx_tso_segment()
48 		 * Compute the length of all the data added for the A-MSDU.  in iwl_tx_tso_segment()
49 		 * This will be used to compute the length to write in the TX  in iwl_tx_tso_segment()
50 		 * command. We have: SNAP + IP + TCP for n -1 subframes and  in iwl_tx_tso_segment()
53 		tcp_payload_len = skb_tail_pointer(tmp) -  in iwl_tx_tso_segment()
54 			skb_transport_header(tmp) -  in iwl_tx_tso_segment()
55 			tcp_hdrlen(tmp) + tmp->data_len;  in iwl_tx_tso_segment()
58 			ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);  in iwl_tx_tso_segment()
61 			skb_shinfo(tmp)->gso_size = mss;  in iwl_tx_tso_segment()
62 			skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :  in iwl_tx_tso_segment()
71 				qc = ieee80211_get_qos_ctl((void *)tmp->data);  in iwl_tx_tso_segment()
74 			skb_shinfo(tmp)->gso_size = 0;  in iwl_tx_tso_segment()