1*5113495bSYour Name /*
2*5113495bSYour Name * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
3*5113495bSYour Name *
4*5113495bSYour Name * Permission to use, copy, modify, and/or distribute this software for any
5*5113495bSYour Name * purpose with or without fee is hereby granted, provided that the above
6*5113495bSYour Name * copyright notice and this permission notice appear in all copies.
7*5113495bSYour Name *
8*5113495bSYour Name * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9*5113495bSYour Name * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10*5113495bSYour Name * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11*5113495bSYour Name * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12*5113495bSYour Name * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13*5113495bSYour Name * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14*5113495bSYour Name * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15*5113495bSYour Name */
16*5113495bSYour Name
17*5113495bSYour Name /**
18*5113495bSYour Name * DOC: osif_dp_lro.c
19*5113495bSYour Name * This file contains DP component's LRO osif API implementation
20*5113495bSYour Name */
21*5113495bSYour Name #include "os_if_dp_lro.h"
22*5113495bSYour Name #include <wlan_objmgr_vdev_obj.h>
23*5113495bSYour Name #include <linux/inet_lro.h>
24*5113495bSYour Name #include <linux/list.h>
25*5113495bSYour Name #include <linux/random.h>
26*5113495bSYour Name #include <net/tcp.h>
27*5113495bSYour Name
28*5113495bSYour Name #define LRO_VALID_FIELDS \
29*5113495bSYour Name (LRO_DESC | LRO_ELIGIBILITY_CHECKED | LRO_TCP_ACK_NUM | \
30*5113495bSYour Name LRO_TCP_DATA_CSUM | LRO_TCP_SEQ_NUM | LRO_TCP_WIN)
31*5113495bSYour Name
32*5113495bSYour Name #if defined(QCA_WIFI_QCA6290) || defined(QCA_WIFI_QCA6390) || \
33*5113495bSYour Name defined(QCA_WIFI_QCA6490) || defined(QCA_WIFI_QCA6750) || \
34*5113495bSYour Name defined(QCA_WIFI_KIWI) || defined(QCA_WIFI_WCN6450)
35*5113495bSYour Name #ifdef WLAN_FEATURE_LRO_CTX_IN_CB
osif_dp_get_lro_ctx(struct sk_buff * skb)36*5113495bSYour Name static qdf_lro_ctx_t osif_dp_get_lro_ctx(struct sk_buff *skb)
37*5113495bSYour Name {
38*5113495bSYour Name return (qdf_lro_ctx_t)QDF_NBUF_CB_RX_LRO_CTX(skb);
39*5113495bSYour Name }
40*5113495bSYour Name #else
osif_dp_get_lro_ctx(struct sk_buff * skb)41*5113495bSYour Name static qdf_lro_ctx_t osif_dp_get_lro_ctx(struct sk_buff *skb)
42*5113495bSYour Name {
43*5113495bSYour Name struct hif_opaque_softc *hif_hdl =
44*5113495bSYour Name (struct hif_opaque_softc *)cds_get_context(QDF_MODULE_ID_HIF);
45*5113495bSYour Name if (!hif_hdl)
46*5113495bSYour Name return NULL;
47*5113495bSYour Name
48*5113495bSYour Name return hif_get_lro_info(QDF_NBUF_CB_RX_CTX_ID(skb), hif_hdl);
49*5113495bSYour Name }
50*5113495bSYour Name #endif
51*5113495bSYour Name
52*5113495bSYour Name /**
53*5113495bSYour Name * osif_dp_lro_rx() - LRO receive function
54*5113495bSYour Name * @dev: netdev
55*5113495bSYour Name * @nbuf: network buffer
56*5113495bSYour Name *
57*5113495bSYour Name * Delivers LRO eligible frames to the LRO manager
58*5113495bSYour Name *
59*5113495bSYour Name * Return: QDF_STATUS_SUCCESS - frame delivered to LRO manager
60*5113495bSYour Name * QDF_STATUS_E_FAILURE - frame not delivered
61*5113495bSYour Name */
osif_dp_lro_rx(qdf_netdev_t dev,qdf_nbuf_t nbuf)62*5113495bSYour Name QDF_STATUS osif_dp_lro_rx(qdf_netdev_t dev, qdf_nbuf_t nbuf)
63*5113495bSYour Name {
64*5113495bSYour Name qdf_lro_ctx_t ctx;
65*5113495bSYour Name QDF_STATUS status = QDF_STATUS_E_FAILURE;
66*5113495bSYour Name struct qdf_lro_info info;
67*5113495bSYour Name struct net_lro_desc *lro_desc = NULL;
68*5113495bSYour Name struct sk_buff * skb = (struct sk_buff *)nbuf;
69*5113495bSYour Name
70*5113495bSYour Name if ((dev->features & NETIF_F_LRO) != NETIF_F_LRO)
71*5113495bSYour Name return QDF_STATUS_E_NOSUPPORT;
72*5113495bSYour Name
73*5113495bSYour Name ctx = osif_dp_get_lro_ctx(skb);
74*5113495bSYour Name if (!ctx) {
75*5113495bSYour Name osif_err("LRO mgr is NULL");
76*5113495bSYour Name return status;
77*5113495bSYour Name }
78*5113495bSYour Name
79*5113495bSYour Name info.iph = skb->data;
80*5113495bSYour Name info.tcph = skb->data + QDF_NBUF_CB_RX_TCP_OFFSET(skb);
81*5113495bSYour Name ctx->lro_mgr->dev = dev;
82*5113495bSYour Name if (qdf_lro_get_info(ctx, skb, &info, (void **)&lro_desc)) {
83*5113495bSYour Name struct net_lro_info dp_lro_info;
84*5113495bSYour Name
85*5113495bSYour Name dp_lro_info.valid_fields = LRO_VALID_FIELDS;
86*5113495bSYour Name
87*5113495bSYour Name dp_lro_info.lro_desc = lro_desc;
88*5113495bSYour Name dp_lro_info.lro_eligible = 1;
89*5113495bSYour Name dp_lro_info.tcp_ack_num = QDF_NBUF_CB_RX_TCP_ACK_NUM(skb);
90*5113495bSYour Name dp_lro_info.tcp_data_csum =
91*5113495bSYour Name csum_unfold(htons(QDF_NBUF_CB_RX_TCP_CHKSUM(skb)));
92*5113495bSYour Name dp_lro_info.tcp_seq_num = QDF_NBUF_CB_RX_TCP_SEQ_NUM(skb);
93*5113495bSYour Name dp_lro_info.tcp_win = QDF_NBUF_CB_RX_TCP_WIN(skb);
94*5113495bSYour Name
95*5113495bSYour Name lro_receive_skb_ext(ctx->lro_mgr, skb, NULL,
96*5113495bSYour Name &dp_lro_info);
97*5113495bSYour Name
98*5113495bSYour Name if (!dp_lro_info.lro_desc->active)
99*5113495bSYour Name qdf_lro_desc_free(ctx, lro_desc);
100*5113495bSYour Name
101*5113495bSYour Name status = QDF_STATUS_SUCCESS;
102*5113495bSYour Name } else {
103*5113495bSYour Name qdf_lro_flush_pkt(ctx, &info);
104*5113495bSYour Name }
105*5113495bSYour Name return status;
106*5113495bSYour Name }
107*5113495bSYour Name
108*5113495bSYour Name /**
109*5113495bSYour Name * osif_dp_lro_display_stats() - display LRO statistics
110*5113495bSYour Name * @vdev: vdev objmgr context
111*5113495bSYour Name *
112*5113495bSYour Name * Return: none
113*5113495bSYour Name */
osif_dp_lro_display_stats(struct wlan_vdev_objmgr * vdev)114*5113495bSYour Name void osif_dp_lro_display_stats(struct wlan_vdev_objmgr *vdev)
115*5113495bSYour Name {
116*5113495bSYour Name osif_debug("LRO stats is broken, will fix it");
117*5113495bSYour Name }
118*5113495bSYour Name
119*5113495bSYour Name QDF_STATUS
osif_dp_lro_set_reset(struct wlan_vdev_objmgr * vdev,uint8_t enable_flag)120*5113495bSYour Name osif_dp_lro_set_reset(struct wlan_vdev_objmgr *vdev, uint8_t enable_flag)
121*5113495bSYour Name {
122*5113495bSYour Name struct vdev_osif_priv *osif_priv;
123*5113495bSYour Name struct net_device *dev;
124*5113495bSYour Name QDF_STATUS status;
125*5113495bSYour Name
126*5113495bSYour Name osif_priv = wlan_vdev_get_ospriv(vdev);
127*5113495bSYour Name dev = osif_priv->wdev->netdev;
128*5113495bSYour Name
129*5113495bSYour Name status = ucfg_dp_lro_set_reset(vdev, enable_flag);
130*5113495bSYour Name if (QDF_IS_STATUS_ERROR(status))
131*5113495bSYour Name return 0;
132*5113495bSYour Name
133*5113495bSYour Name if (enable_flag)
134*5113495bSYour Name dev->features |= NETIF_F_LRO;
135*5113495bSYour Name else
136*5113495bSYour Name dev->features &= ~NETIF_F_LRO;
137*5113495bSYour Name
138*5113495bSYour Name return 0;
139*5113495bSYour Name }
140