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ipq806x: NSS Hardware Offloading mac80211 support

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This commit is contained in:
ACwifidude
2022-09-30 11:33:18 -05:00
committed by Lucas Asvio
parent 1b6ca8448f
commit eeadcfd895
2 changed files with 310 additions and 4 deletions
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22
package/kernel/mac80211/Makefile
View File

@@ -80,6 +80,7 @@ config-$(CONFIG_PACKAGE_CFG80211_TESTMODE) += NL80211_TESTMODE
config-$(call config_package,mac80211) += MAC80211
config-$(CONFIG_PACKAGE_MAC80211_MESH) += MAC80211_MESH
config-$(CONFIG_PACKAGE_MAC80211_NSS_SUPPORT) += MAC80211_NSS_SUPPORT
include ath.mk
include broadcom.mk
@@ -123,7 +124,7 @@ define KernelPackage/mac80211
$(call KernelPackage/mac80211/Default)
TITLE:=Linux 802.11 Wireless Networking Stack
# +kmod-crypto-cmac is a runtime only dependency of net/mac80211/aes_cmac.c
DEPENDS+= +kmod-cfg80211 +kmod-crypto-cmac +kmod-crypto-ccm +kmod-crypto-gcm +hostapd-common
DEPENDS+= +kmod-cfg80211 +kmod-crypto-cmac +kmod-crypto-ccm +kmod-crypto-gcm +hostapd-common +PACKAGE_kmod-qca-nss-drv:kmod-qca-nss-drv
KCONFIG:=\
CONFIG_AVERAGE=y
FILES:= $(PKG_BUILD_DIR)/net/mac80211/mac80211.ko
@@ -134,6 +135,16 @@ endef
define KernelPackage/mac80211/config
if PACKAGE_kmod-mac80211
if PACKAGE_kmod-qca-nss-drv
config PACKAGE_MAC80211_NSS_SUPPORT
bool "Enable NSS support for IPQ platform"
default y
help
This option enables support for NSS in boards
like Netgear R7800.
endif
config PACKAGE_MAC80211_DEBUGFS
bool "Export mac80211 internals in DebugFS"
select KERNEL_DEBUG_FS
@@ -275,9 +286,12 @@ ifeq ($(BUILD_VARIANT),smallbuffers)
C_DEFINES+= -DCONFIG_ATH10K_SMALLBUFFERS
endif
MAKE_OPTS:= \
$(subst -C $(LINUX_DIR),-C "$(PKG_BUILD_DIR)",$(KERNEL_MAKEOPTS)) \
EXTRA_CFLAGS="-I$(PKG_BUILD_DIR)/include $(IREMAP_CFLAGS) $(C_DEFINES)" \
C_DEFINES+= -DSTANDALONE_CT
MAKE_OPTS:= -C "$(PKG_BUILD_DIR)" \
$(KERNEL_MAKE_FLAGS) \
EXTRA_CFLAGS="-I$(PKG_BUILD_DIR)/include $(IREMAP_CFLAGS) $(C_DEFINES) \
-I$(STAGING_DIR)/usr/include/qca-nss-drv" \
KLIB_BUILD="$(LINUX_DIR)" \
MODPROBE=true \
KLIB=$(TARGET_MODULES_DIR) \

292
package/kernel/mac80211/patches/subsys/999-mac80211-NSS-support.patch Normal file
View File

@@ -0,0 +1,292 @@
--- a/local-symbols
+++ b/local-symbols
@@ -39,6 +39,7 @@ LIB80211_CRYPT_CCMP=
LIB80211_CRYPT_TKIP=
LIB80211_DEBUG=
MAC80211=
+MAC80211_NSS_SUPPORT=
MAC80211_HAS_RC=
MAC80211_RC_MINSTREL=
MAC80211_RC_DEFAULT_MINSTREL=
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -19,6 +19,13 @@ comment "CFG80211 needs to be enabled fo
if MAC80211 != n
+config MAC80211_NSS_SUPPORT
+ bool "Enable NSS support for IPQ platform"
+ default n
+ ---help---
+ This option enables support for NSS in boards
+ like AP148.
+
config MAC80211_HAS_RC
bool
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -36,6 +36,10 @@
extern const struct cfg80211_ops mac80211_config_ops;
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+#include <nss_api_if.h>
+#endif
+
struct ieee80211_local;
/* Maximum number of broadcast/multicast frames to buffer when some of the
@@ -1034,6 +1038,12 @@ struct ieee80211_sub_if_data {
} debugfs;
#endif
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+ struct nss_virt_if_handle *nssctx;
+ struct sk_buff_head rx_queue;
+ struct work_struct rx_work;
+#endif
+
/* must be last, dynamically sized area in this! */
struct ieee80211_vif vif;
};
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -664,6 +664,15 @@ static int ieee80211_stop(struct net_dev
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+ if (sdata->nssctx) {
+ cancel_work_sync(&sdata->rx_work);
+ skb_queue_purge(&sdata->rx_queue);
+ nss_virt_if_destroy_sync(sdata->nssctx);
+ sdata->nssctx = NULL;
+ sdata_info(sdata, "Destroyed NSS virtual interface\n");
+ }
+#endif
/* close dependent VLAN and MBSSID interfaces before locking wiphy */
if (sdata->vif.type == NL80211_IFTYPE_AP) {
struct ieee80211_sub_if_data *vlan, *tmpsdata;
@@ -1188,6 +1197,89 @@ void ieee80211_del_virtual_monitor(struc
kfree(sdata);
}
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+#define case_rtn_string(val) case val: return #val
+
+static const char *nss_tx_status_str(nss_tx_status_t status)
+{
+ switch (status) {
+ case_rtn_string(NSS_TX_SUCCESS);
+ case_rtn_string(NSS_TX_FAILURE);
+ case_rtn_string(NSS_TX_FAILURE_QUEUE);
+ case_rtn_string(NSS_TX_FAILURE_NOT_READY);
+ case_rtn_string(NSS_TX_FAILURE_TOO_LARGE);
+ case_rtn_string(NSS_TX_FAILURE_TOO_SHORT);
+ case_rtn_string(NSS_TX_FAILURE_NOT_SUPPORTED);
+ case_rtn_string(NSS_TX_FAILURE_BAD_PARAM);
+ case_rtn_string(NSS_TX_FAILURE_NOT_ENABLED);
+ case_rtn_string(NSS_TX_FAILURE_SYNC_BAD_PARAM);
+ case_rtn_string(NSS_TX_FAILURE_SYNC_TIMEOUT);
+ case_rtn_string(NSS_TX_FAILURE_SYNC_FW_ERR);
+ default:
+ return "Unknown NSS TX status";
+ }
+}
+
+static void netif_rx_nss_work(struct work_struct *work)
+{
+ int ret;
+ unsigned long flags;
+ struct sk_buff *skb;
+ struct sk_buff_head *list;
+ struct ieee80211_sub_if_data *sdata =
+ container_of(work, struct ieee80211_sub_if_data, rx_work);
+
+ list = &sdata->rx_queue;
+ skb = skb_dequeue(list);
+
+ while (skb != NULL) {
+ skb_push(skb, ETH_HLEN);
+ ret = nss_virt_if_tx_buf(sdata->nssctx, skb);
+ if (unlikely(ret)) {
+ if (net_ratelimit() && ret != NSS_TX_FAILURE_TOO_SHORT) {
+ sdata_err(sdata, "NSS TX failed with error: %s\n",
+ nss_tx_status_str(ret));
+ }
+ skb_pull(skb, ETH_HLEN);
+ netif_receive_skb(skb);
+ }
+
+ skb = skb_dequeue(list);
+ }
+
+ /* Check if we there are more packet to process and resched */
+ skb = skb_peek(list);
+ if (skb)
+ schedule_work(&sdata->rx_work);
+}
+
+/* This callback is registered for nss redirect to receive packet exceptioned from nss in Rx path.
+ * When packet does not match any of the ecm rules is redirected back here.
+ */
+void receive_from_nss(struct net_device *dev, struct sk_buff *sk_buff, struct napi_struct *napi)
+{
+ struct net_device *netdev;
+ struct sk_buff *skb;
+ struct ieee80211_sub_if_data *sdata;
+
+ if (!dev) {
+ kfree(sk_buff);
+ return;
+ }
+
+ netdev = (struct net_device *)dev;
+ sdata = netdev_priv(netdev);
+ if (sdata->dev != dev) {
+ kfree(sk_buff);
+ return;
+ }
+ skb = (struct sk_buff *)sk_buff;
+ skb->dev = netdev;
+ skb->protocol = eth_type_trans(skb, netdev);
+ napi_gro_receive(napi, skb);
+}
+#endif
+
/*
* NOTE: Be very careful when changing this function, it must NOT return
* an error on interface type changes that have been pre-checked, so most
@@ -1419,6 +1511,17 @@ int ieee80211_do_open(struct wireless_de
ieee80211_recalc_ps(local);
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+ sdata->nssctx = nss_virt_if_create_sync(dev);
+ if (sdata->nssctx) {
+ sdata_info(sdata, "Created a NSS virtual interface\n");
+ nss_virt_if_register(sdata->nssctx, receive_from_nss, sdata->dev);
+ skb_queue_head_init(&sdata->rx_queue);
+ INIT_WORK(&sdata->rx_work, &netif_rx_nss_work);
+ } else
+ sdata_err(sdata, "Failed to create a NSS virtual interface\n");
+#endif
+
if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
local->ops->wake_tx_queue) {
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2573,6 +2573,13 @@ static bool ieee80211_frame_allowed(stru
return true;
}
+static inline void netif_rx_nss(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
+{
+ skb_queue_tail(&sdata->rx_queue, skb);
+
+ schedule_work(&sdata->rx_work);
+}
+
static void ieee80211_deliver_skb_to_local_stack(struct sk_buff *skb,
struct ieee80211_rx_data *rx)
{
@@ -2593,6 +2600,12 @@ static void ieee80211_deliver_skb_to_loc
memset(skb->cb, 0, sizeof(skb->cb));
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+ if (sdata->nssctx) {
+ netif_rx_nss(skb, sdata);
+ return;
+ }
+#endif
/*
* 802.1X over 802.11 requires that the authenticator address
* be used for EAPOL frames. However, 802.1X allows the use of
@@ -4489,6 +4502,7 @@ static void ieee80211_rx_8023(struct iee
{
struct ieee80211_sta_rx_stats *stats;
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
struct sta_info *sta = rx->sta;
struct sk_buff *skb = rx->skb;
void *sa = skb->data + ETH_ALEN;
@@ -4574,6 +4588,13 @@ static void ieee80211_rx_8023(struct iee
/* deliver to local stack */
skb->protocol = eth_type_trans(skb, fast_rx->dev);
ieee80211_deliver_skb_to_local_stack(skb, rx);
+
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+ if (sdata->nssctx) {
+ netif_rx_nss(skb, sdata);
+ return;
+ }
+#endif
}
static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -36,6 +36,11 @@
#include "wme.h"
#include "rate.h"
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+#include <net/ip.h>
+#include <net/dsfield.h>
+#endif
+
/* misc utils */
static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
@@ -1687,6 +1692,16 @@ static bool ieee80211_tx_frags(struct ie
return true;
}
} else {
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+ if (skb_queue_len(&local->pending[q]) >= 1000) {
+ spin_unlock_irqrestore(
+ &local->queue_stop_reason_lock,
+ flags);
+ ieee80211_purge_tx_queue(&local->hw,
+ skbs);
+ return false;
+ }
+#endif
/*
* Since queue is stopped, queue up frames for
@@ -4296,6 +4311,31 @@ out:
netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
+
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+ /* Packets from NSS does not have valid protocol, priority and other
+ * network stack values. Derive required parameters (priority
+ * and network_header) from payload for QoS header.
+ * XXX: Here the assumption is that packet are in 802.3 format.
+ * As of now priority is handled only for IPv4 and IPv6.
+ */
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ if (sdata->nssctx && likely(!skb->protocol)) {
+ skb_set_network_header(skb, 14);
+ switch (((struct ethhdr *)skb->data)->h_proto) {
+ case htons(ETH_P_IP):
+ skb->priority = (ipv4_get_dsfield(ip_hdr(skb)) &
+ 0xfc) >> 5;
+ break;
+ case htons(ETH_P_IPV6):
+ skb->priority = (ipv6_get_dsfield(ipv6_hdr(skb)) &
+ 0xfc) >> 5;
+ break;
+ }
+ }
+#endif
+
if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
struct sk_buff_head queue;