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Message-ID: <e3502ecffe0c4c01b263ada8deed814d5135c24c.camel@egauge.net>
Date: Sat, 11 Dec 2021 13:32:09 -0700
From: David Mosberger-Tang <davidm@...uge.net>
To: Ajay Singh <ajay.kathat@...rochip.com>,
Claudiu Beznea <claudiu.beznea@...rochip.com>,
Kalle Valo <kvalo@...eaurora.org>
Cc: linux-wireless <linux-wireless@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RFC: wilc1000: refactor TX path to use sk_buff queue
I'd like to propose to restructure the wilc1000 TX path to take
advantage of the existing sk_buff queuing and buffer operations rather
than using a driver-specific solution. To me, the resulting code looks
simpler and the diffstat shows a fair amount of code-reduction:
cfg80211.c | 35 ----
mon.c | 36 ----
netdev.c | 28 ---
netdev.h | 10 -
wlan.c | 499 ++++++++++++++++++++++++++-----------------------------------
wlan.h | 51 ++----
6 files changed, 255 insertions(+), 404 deletions(-)
Performance isn't significantly affected by this patch:
Before this patch:
TX [Mbps] RX [Mbps]
PSM off: 15.4 19.7
PSM on: 12.2 17.9
With this patch:
TX [Mbps] RX [Mbps]
PSM off: 15.9 20.5
PSM on: 12.3 18.8
The question I have is whether something along these lines would be
even considered for merging. The problem is that the patch is fairly
large and I don't see any obvious way of making it smaller or splitting
it into smaller pieces: once you switch the tx queue data structure,
there is just a bunch of code that needs to get updated as well in
order to get a working driver again.
Notes:
- Don't try to apply this patch as is. There are two other small
but unrelated changes that this patch below depends on.
- This patch leaves txq_spinlock in place even though its only
remaining function is to serialize access to wilc->tx_q_limit
and vif->ack_filter. This obviously could be renamed in
a separate patch. Actually, speaking of which, is there
no common code in the kernel to handle duplicate-ack
elimination?
Thoughts and/or suggestions?
Thanks,
--david
diff --git a/drivers/net/wireless/microchip/wilc1000/cfg80211.c b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
index be387a8abb6a..d352b7dd0328 100644
--- a/drivers/net/wireless/microchip/wilc1000/cfg80211.c
+++ b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
@@ -1038,14 +1038,6 @@ void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size)
cfg80211_rx_mgmt(&priv->wdev, freq, 0, buff, size, 0);
}
-static void wilc_wfi_mgmt_tx_complete(void *priv, int status)
-{
- struct wilc_p2p_mgmt_data *pv_data = priv;
-
- kfree(pv_data->buff);
- kfree(pv_data);
-}
-
static void wilc_wfi_remain_on_channel_expired(void *data, u64 cookie)
{
struct wilc_vif *vif = data;
@@ -1124,7 +1116,7 @@ static int mgmt_tx(struct wiphy *wiphy,
const u8 *buf = params->buf;
size_t len = params->len;
const struct ieee80211_mgmt *mgmt;
- struct wilc_p2p_mgmt_data *mgmt_tx;
+ struct sk_buff *skb;
struct wilc_vif *vif = netdev_priv(wdev->netdev);
struct wilc_priv *priv = &vif->priv;
struct host_if_drv *wfi_drv = priv->hif_drv;
@@ -1141,20 +1133,11 @@ static int mgmt_tx(struct wiphy *wiphy,
if (!ieee80211_is_mgmt(mgmt->frame_control))
goto out;
- mgmt_tx = kmalloc(sizeof(*mgmt_tx), GFP_KERNEL);
- if (!mgmt_tx) {
- ret = -ENOMEM;
- goto out;
- }
-
- mgmt_tx->buff = kmemdup(buf, len, GFP_KERNEL);
- if (!mgmt_tx->buff) {
- ret = -ENOMEM;
- kfree(mgmt_tx);
- goto out;
- }
+ skb = wilc_wlan_alloc_skb(vif, len);
+ if (!skb)
+ return -ENOMEM;
- mgmt_tx->size = len;
+ skb_put_data(skb, buf, len);
if (ieee80211_is_probe_resp(mgmt->frame_control)) {
wilc_set_mac_chnl_num(vif, chan->hw_value);
@@ -1176,7 +1159,7 @@ static int mgmt_tx(struct wiphy *wiphy,
goto out_set_timeout;
vendor_ie = cfg80211_find_vendor_ie(WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P,
- mgmt_tx->buff + ie_offset,
+ skb->data + ie_offset,
len - ie_offset);
if (!vendor_ie)
goto out_set_timeout;
@@ -1189,9 +1172,7 @@ static int mgmt_tx(struct wiphy *wiphy,
out_txq_add_pkt:
- wilc_wlan_txq_add_mgmt_pkt(wdev->netdev, mgmt_tx,
- mgmt_tx->buff, mgmt_tx->size,
- wilc_wfi_mgmt_tx_complete);
+ wilc_wlan_txq_add_mgmt_pkt(wdev->netdev, skb);
out:
@@ -1732,7 +1713,7 @@ int wilc_cfg80211_init(struct wilc **wilc, struct device *dev, int io_type,
wl->hif_func = ops;
for (i = 0; i < NQUEUES; i++)
- INIT_LIST_HEAD(&wl->txq[i].txq_head.list);
+ skb_queue_head_init(&wl->txq[i]);
INIT_LIST_HEAD(&wl->rxq_head.list);
INIT_LIST_HEAD(&wl->vif_list);
diff --git a/drivers/net/wireless/microchip/wilc1000/mon.c b/drivers/net/wireless/microchip/wilc1000/mon.c
index 6bd63934c2d8..0b1c4f266cca 100644
--- a/drivers/net/wireless/microchip/wilc1000/mon.c
+++ b/drivers/net/wireless/microchip/wilc1000/mon.c
@@ -95,45 +95,21 @@ void wilc_wfi_monitor_rx(struct net_device *mon_dev, u8 *buff, u32 size)
netif_rx(skb);
}
-struct tx_complete_mon_data {
- int size;
- void *buff;
-};
-
-static void mgmt_tx_complete(void *priv, int status)
-{
- struct tx_complete_mon_data *pv_data = priv;
- /*
- * in case of fully hosting mode, the freeing will be done
- * in response to the cfg packet
- */
- kfree(pv_data->buff);
-
- kfree(pv_data);
-}
-
static int mon_mgmt_tx(struct net_device *dev, const u8 *buf, size_t len)
{
- struct tx_complete_mon_data *mgmt_tx = NULL;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct sk_buff *skb;
if (!dev)
return -EFAULT;
netif_stop_queue(dev);
- mgmt_tx = kmalloc(sizeof(*mgmt_tx), GFP_ATOMIC);
- if (!mgmt_tx)
- return -ENOMEM;
-
- mgmt_tx->buff = kmemdup(buf, len, GFP_ATOMIC);
- if (!mgmt_tx->buff) {
- kfree(mgmt_tx);
+ skb = wilc_wlan_alloc_skb(vif, len);
+ if (!skb)
return -ENOMEM;
- }
-
- mgmt_tx->size = len;
+ skb_put_data(skb, buf, len);
- wilc_wlan_txq_add_mgmt_pkt(dev, mgmt_tx, mgmt_tx->buff, mgmt_tx->size,
- mgmt_tx_complete);
+ wilc_wlan_txq_add_mgmt_pkt(dev, skb);
netif_wake_queue(dev);
return 0;
diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c
index 28e3232e1dae..0c822d441907 100644
--- a/drivers/net/wireless/microchip/wilc1000/netdev.c
+++ b/drivers/net/wireless/microchip/wilc1000/netdev.c
@@ -149,7 +149,7 @@ static int wilc_txq_task(void *vp)
complete(&wl->txq_thread_started);
while (1) {
wait_event_interruptible(wl->txq_event,
- (wl->txq_entries > 0 || wl->close));
+ (atomic_read(&wl->txq_entries) > 0 || wl->close));
if (wl->close) {
complete(&wl->txq_thread_started);
@@ -717,19 +717,10 @@ static void wilc_set_multicast_list(struct net_device *dev)
kfree(mc_list);
}
-static void wilc_tx_complete(void *priv, int status)
-{
- struct tx_complete_data *pv_data = priv;
-
- dev_kfree_skb(pv_data->skb);
- kfree(pv_data);
-}
-
netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct wilc_vif *vif = netdev_priv(ndev);
struct wilc *wilc = vif->wilc;
- struct tx_complete_data *tx_data = NULL;
int queue_count;
if (skb->dev != ndev) {
@@ -737,22 +728,9 @@ netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
return NETDEV_TX_OK;
}
- tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
- if (!tx_data) {
- dev_kfree_skb(skb);
- netif_wake_queue(ndev);
- return NETDEV_TX_OK;
- }
-
- tx_data->buff = skb->data;
- tx_data->size = skb->len;
- tx_data->skb = skb;
-
vif->netstats.tx_packets++;
- vif->netstats.tx_bytes += tx_data->size;
- queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
- tx_data->buff, tx_data->size,
- wilc_tx_complete);
+ vif->netstats.tx_bytes += skb->len;
+ queue_count = wilc_wlan_txq_add_net_pkt(ndev, skb);
if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
int srcu_idx;
diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.h b/drivers/net/wireless/microchip/wilc1000/netdev.h
index 7ed4e9e2d149..a1f744dc47b6 100644
--- a/drivers/net/wireless/microchip/wilc1000/netdev.h
+++ b/drivers/net/wireless/microchip/wilc1000/netdev.h
@@ -163,7 +163,7 @@ struct ack_session_info {
struct pending_acks {
u32 ack_num;
u32 session_index;
- struct txq_entry_t *txqe;
+ struct sk_buff *txqe;
};
struct tcp_ack_filter {
@@ -247,16 +247,16 @@ struct wilc {
/* lock to protect issue of wid command to firmware */
struct mutex cfg_cmd_lock;
- struct wilc_cfg_frame cfg_frame;
- u32 cfg_frame_offset;
+ struct sk_buff *cfg_skb;
u8 cfg_seq_no;
u8 *rx_buffer;
u32 rx_buffer_offset;
u8 *tx_buffer;
- struct txq_handle txq[NQUEUES];
- int txq_entries;
+ atomic_t txq_entries; /* total # of tx packets queued */
+ struct sk_buff_head txq[NQUEUES];
+ struct txq_fw_recv_queue_stat fw[NQUEUES];
struct wilc_tx_queue_status tx_q_limit;
struct rxq_entry_t rxq_head;
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index f552f69c99d9..a3bd8f133f5e 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -11,6 +11,7 @@
#include "wlan_cfg.h"
#define WAKE_UP_TRIAL_RETRY 10000
+#define NOT_TCP_ACK (-1)
static inline bool is_wilc1000(u32 id)
{
@@ -31,72 +32,47 @@ static inline void release_bus(struct wilc *wilc, enum bus_release release)
mutex_unlock(&wilc->hif_cs);
}
-static void wilc_wlan_txq_remove(struct wilc *wilc, u8 q_num,
- struct txq_entry_t *tqe)
-{
- list_del(&tqe->list);
- wilc->txq_entries -= 1;
- wilc->txq[q_num].count--;
-}
-
-static struct txq_entry_t *
-wilc_wlan_txq_remove_from_head(struct wilc *wilc, u8 q_num)
+static void wilc_set_tx_cb(struct sk_buff *tqe,
+ u8 type, enum ip_pkt_priority q_num)
{
- struct txq_entry_t *tqe = NULL;
- unsigned long flags;
-
- spin_lock_irqsave(&wilc->txq_spinlock, flags);
+ struct wilc_skb_tx_cb *tx_cb = WILC_SKB_TX_CB(tqe);
- if (!list_empty(&wilc->txq[q_num].txq_head.list)) {
- tqe = list_first_entry(&wilc->txq[q_num].txq_head.list,
- struct txq_entry_t, list);
- list_del(&tqe->list);
- wilc->txq_entries -= 1;
- wilc->txq[q_num].count--;
- }
- spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
- return tqe;
+ tx_cb->type = type;
+ tx_cb->q_num = q_num;
+ tx_cb->ack_idx = NOT_TCP_ACK;
}
-static void wilc_wlan_txq_add_to_tail(struct net_device *dev, u8 q_num,
- struct txq_entry_t *tqe)
+static void wilc_wlan_txq_add_to_tail(struct net_device *dev,
+ u8 type, enum ip_pkt_priority q_num,
+ struct sk_buff *tqe)
{
- unsigned long flags;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc = vif->wilc;
- spin_lock_irqsave(&wilc->txq_spinlock, flags);
+ wilc_set_tx_cb(tqe, type, q_num);
- list_add_tail(&tqe->list, &wilc->txq[q_num].txq_head.list);
- wilc->txq_entries += 1;
- wilc->txq[q_num].count++;
-
- spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+ skb_queue_tail(&wilc->txq[q_num], tqe);
+ atomic_inc(&wilc->txq_entries);
wake_up_interruptible(&wilc->txq_event);
}
-static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif, u8 q_num,
- struct txq_entry_t *tqe)
+static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif, int type, u8 q_num,
+ struct sk_buff *tqe)
{
- unsigned long flags;
struct wilc *wilc = vif->wilc;
- mutex_lock(&wilc->txq_add_to_head_cs);
+ wilc_set_tx_cb(tqe, type, q_num);
- spin_lock_irqsave(&wilc->txq_spinlock, flags);
+ mutex_lock(&wilc->txq_add_to_head_cs);
- list_add(&tqe->list, &wilc->txq[q_num].txq_head.list);
- wilc->txq_entries += 1;
- wilc->txq[q_num].count++;
+ skb_queue_head(&wilc->txq[q_num], tqe);
+ atomic_inc(&wilc->txq_entries);
- spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
mutex_unlock(&wilc->txq_add_to_head_cs);
wake_up_interruptible(&wilc->txq_event);
}
-#define NOT_TCP_ACK (-1)
-
static inline void add_tcp_session(struct wilc_vif *vif, u32 src_prt,
u32 dst_prt, u32 seq)
{
@@ -122,8 +98,9 @@ static inline void update_tcp_session(struct wilc_vif *vif, u32 index, u32 ack)
static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
u32 session_index,
- struct txq_entry_t *txqe)
+ struct sk_buff *txqe)
{
+ struct wilc_skb_tx_cb *tx_cb = WILC_SKB_TX_CB(txqe);
struct tcp_ack_filter *f = &vif->ack_filter;
u32 i = f->pending_base + f->pending_acks_idx;
@@ -131,14 +108,14 @@ static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
f->pending_acks[i].ack_num = ack;
f->pending_acks[i].txqe = txqe;
f->pending_acks[i].session_index = session_index;
- txqe->ack_idx = i;
+ tx_cb->ack_idx = i;
f->pending_acks_idx++;
}
}
-static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
+static inline void tcp_process(struct net_device *dev, struct sk_buff *tqe)
{
- void *buffer = tqe->buffer;
+ void *buffer = tqe->data;
const struct ethhdr *eth_hdr_ptr = buffer;
int i;
unsigned long flags;
@@ -188,6 +165,36 @@ static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
}
+static void wilc_wlan_tx_packet_done(struct sk_buff *skb, int status)
+{
+ struct wilc_skb_tx_cb *tx_cb = WILC_SKB_TX_CB(skb);
+ struct wilc_vif *vif = netdev_priv(skb->dev);
+ int ack_idx = tx_cb->ack_idx;
+
+ if (vif && ack_idx != NOT_TCP_ACK && ack_idx < MAX_PENDING_ACKS)
+ vif->ack_filter.pending_acks[ack_idx].txqe = NULL;
+ if (status)
+ dev_consume_skb_any(skb);
+ else
+ dev_kfree_skb_any(skb);
+}
+
+static void wilc_wlan_txq_drop_net_pkt(struct sk_buff *skb)
+{
+ struct wilc_vif *vif = netdev_priv(skb->dev);
+ struct wilc *wilc = vif->wilc;
+ struct wilc_skb_tx_cb *tx_cb = WILC_SKB_TX_CB(skb);
+
+ if ((u8)tx_cb->q_num >= NQUEUES) {
+ netdev_err(vif->ndev, "Invalid AC queue number %d",
+ tx_cb->q_num);
+ return;
+ }
+ skb_unlink(skb, &wilc->txq[tx_cb->q_num]);
+ atomic_dec(&wilc->txq_entries);
+ wilc_wlan_tx_packet_done(skb, 1);
+}
+
static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
{
struct wilc_vif *vif = netdev_priv(dev);
@@ -213,17 +220,11 @@ static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
bigger_ack_num = f->ack_session_info[index].bigger_ack_num;
if (f->pending_acks[i].ack_num < bigger_ack_num) {
- struct txq_entry_t *tqe;
+ struct sk_buff *tqe;
tqe = f->pending_acks[i].txqe;
- if (tqe) {
- wilc_wlan_txq_remove(wilc, tqe->q_num, tqe);
- tqe->status = 1;
- if (tqe->tx_complete_func)
- tqe->tx_complete_func(tqe->priv,
- tqe->status);
- kfree(tqe);
- }
+ if (tqe)
+ wilc_wlan_txq_drop_net_pkt(tqe);
}
}
f->pending_acks_idx = 0;
@@ -242,35 +243,18 @@ void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value)
vif->ack_filter.enabled = value;
}
-static int wilc_wlan_txq_add_cfg_pkt(struct wilc_vif *vif, u8 *buffer,
- u32 buffer_size)
+static int wilc_wlan_txq_add_cfg_pkt(struct wilc_vif *vif, struct sk_buff *tqe)
{
- struct txq_entry_t *tqe;
struct wilc *wilc = vif->wilc;
netdev_dbg(vif->ndev, "Adding config packet ...\n");
if (wilc->quit) {
netdev_dbg(vif->ndev, "Return due to clear function\n");
- complete(&wilc->cfg_event);
- return 0;
- }
-
- tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
- if (!tqe) {
- complete(&wilc->cfg_event);
+ dev_kfree_skb_any(tqe);
return 0;
}
- tqe->type = WILC_CFG_PKT;
- tqe->buffer = buffer;
- tqe->buffer_size = buffer_size;
- tqe->tx_complete_func = NULL;
- tqe->priv = NULL;
- tqe->q_num = AC_VO_Q;
- tqe->ack_idx = NOT_TCP_ACK;
- tqe->vif = vif;
-
- wilc_wlan_txq_add_to_head(vif, AC_VO_Q, tqe);
+ wilc_wlan_txq_add_to_head(vif, WILC_CFG_PKT, AC_VO_Q, tqe);
return 1;
}
@@ -314,7 +298,7 @@ static bool is_ac_q_limit(struct wilc *wl, u8 q_num)
else
q_limit = (q->cnt[q_num] * FLOW_CONTROL_UPPER_THRESHOLD / q->sum) + 1;
- if (wl->txq[q_num].count <= q_limit)
+ if (skb_queue_len(&wl->txq[q_num]) <= q_limit)
ret = true;
spin_unlock_irqrestore(&wl->txq_spinlock, flags);
@@ -369,32 +353,32 @@ static inline int ac_balance(struct wilc *wl, u8 *ratio)
return -EINVAL;
for (i = 0; i < NQUEUES; i++)
- if (wl->txq[i].fw.count > max_count)
- max_count = wl->txq[i].fw.count;
+ if (wl->fw[i].count > max_count)
+ max_count = wl->fw[i].count;
for (i = 0; i < NQUEUES; i++)
- ratio[i] = max_count - wl->txq[i].fw.count;
+ ratio[i] = max_count - wl->fw[i].count;
return 0;
}
static inline void ac_update_fw_ac_pkt_info(struct wilc *wl, u32 reg)
{
- wl->txq[AC_BK_Q].fw.count = FIELD_GET(BK_AC_COUNT_FIELD, reg);
- wl->txq[AC_BE_Q].fw.count = FIELD_GET(BE_AC_COUNT_FIELD, reg);
- wl->txq[AC_VI_Q].fw.count = FIELD_GET(VI_AC_COUNT_FIELD, reg);
- wl->txq[AC_VO_Q].fw.count = FIELD_GET(VO_AC_COUNT_FIELD, reg);
-
- wl->txq[AC_BK_Q].fw.acm = FIELD_GET(BK_AC_ACM_STAT_FIELD, reg);
- wl->txq[AC_BE_Q].fw.acm = FIELD_GET(BE_AC_ACM_STAT_FIELD, reg);
- wl->txq[AC_VI_Q].fw.acm = FIELD_GET(VI_AC_ACM_STAT_FIELD, reg);
- wl->txq[AC_VO_Q].fw.acm = FIELD_GET(VO_AC_ACM_STAT_FIELD, reg);
+ wl->fw[AC_BK_Q].count = FIELD_GET(BK_AC_COUNT_FIELD, reg);
+ wl->fw[AC_BE_Q].count = FIELD_GET(BE_AC_COUNT_FIELD, reg);
+ wl->fw[AC_VI_Q].count = FIELD_GET(VI_AC_COUNT_FIELD, reg);
+ wl->fw[AC_VO_Q].count = FIELD_GET(VO_AC_COUNT_FIELD, reg);
+
+ wl->fw[AC_BK_Q].acm = FIELD_GET(BK_AC_ACM_STAT_FIELD, reg);
+ wl->fw[AC_BE_Q].acm = FIELD_GET(BE_AC_ACM_STAT_FIELD, reg);
+ wl->fw[AC_VI_Q].acm = FIELD_GET(VI_AC_ACM_STAT_FIELD, reg);
+ wl->fw[AC_VO_Q].acm = FIELD_GET(VO_AC_ACM_STAT_FIELD, reg);
}
static inline u8 ac_change(struct wilc *wilc, u8 *ac)
{
do {
- if (wilc->txq[*ac].fw.acm == 0)
+ if (wilc->fw[*ac].acm == 0)
return 0;
(*ac)++;
} while (*ac < NQUEUES);
@@ -402,132 +386,59 @@ static inline u8 ac_change(struct wilc *wilc, u8 *ac)
return 1;
}
-int wilc_wlan_txq_add_net_pkt(struct net_device *dev,
- struct tx_complete_data *tx_data, u8 *buffer,
- u32 buffer_size,
- void (*tx_complete_fn)(void *, int))
+int wilc_wlan_txq_add_net_pkt(struct net_device *dev, struct sk_buff *tqe)
{
- struct txq_entry_t *tqe;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc;
u8 q_num;
wilc = vif->wilc;
+ q_num = ac_classify(wilc, tqe);
if (wilc->quit) {
- tx_complete_fn(tx_data, 0);
+ dev_kfree_skb_any(tqe);
return 0;
}
if (!wilc->initialized) {
- tx_complete_fn(tx_data, 0);
+ dev_kfree_skb_any(tqe);
return 0;
}
- tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
-
- if (!tqe) {
- tx_complete_fn(tx_data, 0);
- return 0;
- }
- tqe->type = WILC_NET_PKT;
- tqe->buffer = buffer;
- tqe->buffer_size = buffer_size;
- tqe->tx_complete_func = tx_complete_fn;
- tqe->priv = tx_data;
- tqe->vif = vif;
-
- q_num = ac_classify(wilc, tx_data->skb);
- tqe->q_num = q_num;
if (ac_change(wilc, &q_num)) {
- tx_complete_fn(tx_data, 0);
- kfree(tqe);
+ dev_kfree_skb_any(tqe);
return 0;
}
if (is_ac_q_limit(wilc, q_num)) {
- tqe->ack_idx = NOT_TCP_ACK;
if (vif->ack_filter.enabled)
tcp_process(dev, tqe);
- wilc_wlan_txq_add_to_tail(dev, q_num, tqe);
+ wilc_wlan_txq_add_to_tail(dev, WILC_NET_PKT, q_num, tqe);
} else {
- tx_complete_fn(tx_data, 0);
- kfree(tqe);
+ dev_kfree_skb_any(tqe);
}
-
- return wilc->txq_entries;
+ return atomic_read(&wilc->txq_entries);
}
-int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
- u32 buffer_size,
- void (*tx_complete_fn)(void *, int))
+int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, struct sk_buff *tqe)
{
- struct txq_entry_t *tqe;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc;
wilc = vif->wilc;
if (wilc->quit) {
- tx_complete_fn(priv, 0);
+ dev_kfree_skb_any(tqe);
return 0;
}
-
if (!wilc->initialized) {
- tx_complete_fn(priv, 0);
+ dev_kfree_skb_any(tqe);
return 0;
}
- tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
-
- if (!tqe) {
- tx_complete_fn(priv, 0);
- return 0;
- }
- tqe->type = WILC_MGMT_PKT;
- tqe->buffer = buffer;
- tqe->buffer_size = buffer_size;
- tqe->tx_complete_func = tx_complete_fn;
- tqe->priv = priv;
- tqe->q_num = AC_BE_Q;
- tqe->ack_idx = NOT_TCP_ACK;
- tqe->vif = vif;
- wilc_wlan_txq_add_to_tail(dev, AC_VO_Q, tqe);
+ wilc_wlan_txq_add_to_tail(dev, WILC_MGMT_PKT, AC_VO_Q, tqe);
return 1;
}
-static struct txq_entry_t *wilc_wlan_txq_get_first(struct wilc *wilc, u8 q_num)
-{
- struct txq_entry_t *tqe = NULL;
- unsigned long flags;
-
- spin_lock_irqsave(&wilc->txq_spinlock, flags);
-
- if (!list_empty(&wilc->txq[q_num].txq_head.list))
- tqe = list_first_entry(&wilc->txq[q_num].txq_head.list,
- struct txq_entry_t, list);
-
- spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
-
- return tqe;
-}
-
-static struct txq_entry_t *wilc_wlan_txq_get_next(struct wilc *wilc,
- struct txq_entry_t *tqe,
- u8 q_num)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&wilc->txq_spinlock, flags);
-
- if (!list_is_last(&tqe->list, &wilc->txq[q_num].txq_head.list))
- tqe = list_next_entry(tqe, list);
- else
- tqe = NULL;
- spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
-
- return tqe;
-}
-
static void wilc_wlan_rxq_add(struct wilc *wilc, struct rxq_entry_t *rqe)
{
if (wilc->quit)
@@ -702,7 +613,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
u32 offset = 0;
bool max_size_over = 0, ac_exist = 0;
int vmm_sz = 0;
- struct txq_entry_t *tqe_q[NQUEUES];
+ struct sk_buff *tqe_q[NQUEUES];
+ struct wilc_skb_tx_cb *tx_cb;
+ int ack_idx;
int ret = 0;
int counter;
int timeout;
@@ -727,7 +640,7 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
srcu_read_unlock(&wilc->srcu, srcu_idx);
for (ac = 0; ac < NQUEUES; ac++)
- tqe_q[ac] = wilc_wlan_txq_get_first(wilc, ac);
+ tqe_q[ac] = skb_peek(&wilc->txq[ac]);
i = 0;
sum = 0;
@@ -747,14 +660,15 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
break;
}
- if (tqe_q[ac]->type == WILC_CFG_PKT)
+ tx_cb = WILC_SKB_TX_CB(tqe_q[ac]);
+ if (tx_cb->type == WILC_CFG_PKT)
vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
- else if (tqe_q[ac]->type == WILC_NET_PKT)
+ else if (tx_cb->type == WILC_NET_PKT)
vmm_sz = ETH_ETHERNET_HDR_OFFSET;
else
vmm_sz = HOST_HDR_OFFSET;
- vmm_sz += tqe_q[ac]->buffer_size;
+ vmm_sz += tqe_q[ac]->len;
vmm_sz = ALIGN(vmm_sz, 4);
if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE) {
@@ -762,7 +676,7 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
break;
}
vmm_table[i] = vmm_sz / 4;
- if (tqe_q[ac]->type == WILC_CFG_PKT)
+ if (tx_cb->type == WILC_CFG_PKT)
vmm_table[i] |= BIT(10);
cpu_to_le32s(&vmm_table[i]);
@@ -770,9 +684,8 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
i++;
sum += vmm_sz;
- tqe_q[ac] = wilc_wlan_txq_get_next(wilc,
- tqe_q[ac],
- ac);
+ tqe_q[ac] = skb_peek_next(tqe_q[ac],
+ &wilc->txq[ac]);
}
}
num_pkts_to_add = ac_preserve_ratio;
@@ -860,17 +773,19 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
offset = 0;
i = 0;
do {
- struct txq_entry_t *tqe;
+ struct sk_buff *tqe;
u32 header, buffer_offset;
char *bssid;
u8 mgmt_ptk = 0;
- tqe = wilc_wlan_txq_remove_from_head(wilc, vmm_entries_ac[i]);
+ tqe = skb_dequeue(&wilc->txq[vmm_entries_ac[i]]);
+ atomic_dec(&wilc->txq_entries);
+ tx_cb = WILC_SKB_TX_CB(tqe);
ac_pkt_num_to_chip[vmm_entries_ac[i]]++;
if (!tqe)
break;
- vif = tqe->vif;
+ vif = netdev_priv(tqe->dev);
if (vmm_table[i] == 0)
break;
@@ -878,22 +793,22 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
vmm_sz = FIELD_GET(WILC_VMM_BUFFER_SIZE, vmm_table[i]);
vmm_sz *= 4;
- if (tqe->type == WILC_MGMT_PKT)
+ if (tx_cb->type == WILC_MGMT_PKT)
mgmt_ptk = 1;
- header = (FIELD_PREP(WILC_VMM_HDR_TYPE, tqe->type) |
+ header = (FIELD_PREP(WILC_VMM_HDR_TYPE, tx_cb->type) |
FIELD_PREP(WILC_VMM_HDR_MGMT_FIELD, mgmt_ptk) |
- FIELD_PREP(WILC_VMM_HDR_PKT_SIZE, tqe->buffer_size) |
+ FIELD_PREP(WILC_VMM_HDR_PKT_SIZE, tqe->len) |
FIELD_PREP(WILC_VMM_HDR_BUFF_SIZE, vmm_sz));
cpu_to_le32s(&header);
memcpy(&txb[offset], &header, 4);
- if (tqe->type == WILC_CFG_PKT) {
+ if (tx_cb->type == WILC_CFG_PKT) {
buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
- } else if (tqe->type == WILC_NET_PKT) {
- int prio = tqe->q_num;
+ } else if (tx_cb->type == WILC_NET_PKT) {
+ int prio = tx_cb->q_num;
- bssid = tqe->vif->bssid;
+ bssid = vif->bssid;
buffer_offset = ETH_ETHERNET_HDR_OFFSET;
memcpy(&txb[offset + 4], &prio, sizeof(prio));
memcpy(&txb[offset + 8], bssid, 6);
@@ -901,20 +816,16 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
buffer_offset = HOST_HDR_OFFSET;
}
- memcpy(&txb[offset + buffer_offset],
- tqe->buffer, tqe->buffer_size);
+ memcpy(&txb[offset + buffer_offset], tqe->data, tqe->len);
offset += vmm_sz;
i++;
- tqe->status = 1;
- if (tqe->tx_complete_func)
- tqe->tx_complete_func(tqe->priv, tqe->status);
- if (tqe->ack_idx != NOT_TCP_ACK &&
- tqe->ack_idx < MAX_PENDING_ACKS)
- vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
- kfree(tqe);
+ ack_idx = tx_cb->ack_idx;
+ if (ack_idx != NOT_TCP_ACK && ack_idx < MAX_PENDING_ACKS)
+ vif->ack_filter.pending_acks[ack_idx].txqe = NULL;
+ wilc_wlan_tx_packet_done(tqe, 1);
} while (--entries);
for (i = 0; i < NQUEUES; i++)
- wilc->txq[i].fw.count += ac_pkt_num_to_chip[i];
+ wilc->fw[i].count += ac_pkt_num_to_chip[i];
ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
if (ret)
@@ -929,7 +840,7 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
mutex_unlock(&wilc->txq_add_to_head_cs);
out_update_cnt:
- *txq_count = wilc->txq_entries;
+ *txq_count = atomic_read(&wilc->txq_entries);
return ret;
}
@@ -1220,7 +1131,7 @@ int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
void wilc_wlan_cleanup(struct net_device *dev)
{
- struct txq_entry_t *tqe;
+ struct sk_buff *tqe, *cfg_skb;
struct rxq_entry_t *rqe;
u8 ac;
struct wilc_vif *vif = netdev_priv(dev);
@@ -1228,11 +1139,14 @@ void wilc_wlan_cleanup(struct net_device *dev)
wilc->quit = 1;
for (ac = 0; ac < NQUEUES; ac++) {
- while ((tqe = wilc_wlan_txq_remove_from_head(wilc, ac))) {
- if (tqe->tx_complete_func)
- tqe->tx_complete_func(tqe->priv, 0);
- kfree(tqe);
- }
+ while ((tqe = skb_dequeue(&wilc->txq[ac])))
+ wilc_wlan_tx_packet_done(tqe, 0);
+ atomic_set(&wilc->txq_entries, 0);
+ }
+ cfg_skb = wilc->cfg_skb;
+ if (cfg_skb) {
+ wilc->cfg_skb = NULL;
+ dev_kfree_skb_any(cfg_skb);
}
while ((rqe = wilc_wlan_rxq_remove(wilc)))
@@ -1245,105 +1159,124 @@ void wilc_wlan_cleanup(struct net_device *dev)
wilc->hif_func->hif_deinit(wilc);
}
+struct sk_buff *wilc_wlan_alloc_skb(struct wilc_vif *vif, size_t len)
+{
+ size_t size, headroom;
+ struct sk_buff *skb;
+
+ headroom = vif->ndev->needed_headroom;
+ size = headroom + len + vif->ndev->needed_tailroom;
+ skb = netdev_alloc_skb(vif->ndev, size);
+ if (!skb) {
+ netdev_err(vif->ndev, "Failed to alloc skb");
+ return NULL;
+ }
+ skb_reserve(skb, headroom);
+ return skb;
+}
+
+static struct sk_buff *alloc_cfg_skb(struct wilc_vif *vif)
+{
+ struct sk_buff *skb;
+
+ skb = wilc_wlan_alloc_skb(vif, (sizeof(struct wilc_cfg_cmd_hdr)
+ + WILC_MAX_CFG_FRAME_SIZE));
+ if (!skb)
+ return NULL;
+ skb_reserve(skb, sizeof(struct wilc_cfg_cmd_hdr));
+ return skb;
+}
+
static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
u32 drv_handler)
{
struct wilc *wilc = vif->wilc;
- struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
- int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
-
- if (type == WILC_CFG_SET)
- cfg->hdr.cmd_type = 'W';
- else
- cfg->hdr.cmd_type = 'Q';
+ struct wilc_cfg_cmd_hdr *hdr;
+ int ret;
- cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
- cfg->hdr.total_len = cpu_to_le16(t_len);
- cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
- wilc->cfg_seq_no = cfg->hdr.seq_no;
+ hdr = skb_push(wilc->cfg_skb, sizeof(*hdr));
- if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
- return -1;
+ hdr->cmd_type = (type == WILC_CFG_SET) ? 'W' : 'Q';
+ hdr->seq_no = wilc->cfg_seq_no;
+ hdr->total_len = cpu_to_le16(wilc->cfg_skb->len);
+ hdr->driver_handler = cpu_to_le32(drv_handler);
- return 0;
+ ret = wilc_wlan_txq_add_cfg_pkt(vif, wilc->cfg_skb);
+ /* packet is now either owned by tx queue or has been dropped: */
+ wilc->cfg_skb = NULL;
+ return ret == 0;
}
-int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
- u32 buffer_size, int commit, u32 drv_handler)
+/**
+ * Add a WID set/query to the current config packet and optionally
+ * submit the resulting packet to the chip and wait for its reply.
+ * Returns 0 on failure, positive number on success.
+ */
+static int wilc_wlan_cfg_apply_wid(struct wilc_vif *vif, int start, u16 wid,
+ u8 *buffer, u32 buffer_size, int commit,
+ u32 drv_handler, bool set)
{
- u32 offset;
int ret_size;
struct wilc *wilc = vif->wilc;
mutex_lock(&wilc->cfg_cmd_lock);
- if (start)
- wilc->cfg_frame_offset = 0;
-
- offset = wilc->cfg_frame_offset;
- ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
- wid, buffer, buffer_size);
- offset += ret_size;
- wilc->cfg_frame_offset = offset;
-
- if (!commit) {
- mutex_unlock(&wilc->cfg_cmd_lock);
- return ret_size;
+ if (start) {
+ WARN_ON(wilc->cfg_skb);
+ wilc->cfg_skb = alloc_cfg_skb(vif);
+ if (!wilc->cfg_skb) {
+ netdev_dbg(vif->ndev, "Failed to alloc cfg_skb");
+ return 0;
+ }
}
- netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
-
- if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
- ret_size = 0;
+ if (set)
+ ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_skb->tail, 0,
+ wid, buffer, buffer_size);
+ else
+ ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_skb->tail, 0, wid);
+
+ if (ret_size == 0)
+ netdev_dbg(vif->ndev,
+ "Failed to add WID 0x%x to %s cfg packet\n",
+ wid, set ? "set" : "query");
+
+ skb_put(wilc->cfg_skb, ret_size);
+
+ if (commit) {
+ if (wilc_wlan_cfg_commit(vif,
+ set ? WILC_CFG_SET : WILC_CFG_QUERY,
+ drv_handler)) {
+ netdev_dbg(vif->ndev, "Failed to commit cfg packet");
+ ret_size = 0;
+ goto out;
+ }
- if (!wait_for_completion_timeout(&wilc->cfg_event,
- WILC_CFG_PKTS_TIMEOUT)) {
- netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
- ret_size = 0;
+ if (!wait_for_completion_timeout(&wilc->cfg_event,
+ WILC_CFG_PKTS_TIMEOUT)) {
+ netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
+ ret_size = 0;
+ goto out;
+ }
+ wilc->cfg_seq_no = (wilc->cfg_seq_no + 1) % 256;
}
-
- wilc->cfg_frame_offset = 0;
- wilc->cfg_seq_no += 1;
+out:
mutex_unlock(&wilc->cfg_cmd_lock);
-
return ret_size;
}
+int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
+ u32 buffer_size, int commit, u32 drv_handler)
+{
+ return wilc_wlan_cfg_apply_wid(vif, start, wid, buffer, buffer_size,
+ commit, drv_handler, true);
+}
+
int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
u32 drv_handler)
{
- u32 offset;
- int ret_size;
- struct wilc *wilc = vif->wilc;
-
- mutex_lock(&wilc->cfg_cmd_lock);
-
- if (start)
- wilc->cfg_frame_offset = 0;
-
- offset = wilc->cfg_frame_offset;
- ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
- offset += ret_size;
- wilc->cfg_frame_offset = offset;
-
- if (!commit) {
- mutex_unlock(&wilc->cfg_cmd_lock);
- return ret_size;
- }
-
- if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
- ret_size = 0;
-
- if (!wait_for_completion_timeout(&wilc->cfg_event,
- WILC_CFG_PKTS_TIMEOUT)) {
- netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
- ret_size = 0;
- }
- wilc->cfg_frame_offset = 0;
- wilc->cfg_seq_no += 1;
- mutex_unlock(&wilc->cfg_cmd_lock);
-
- return ret_size;
+ return wilc_wlan_cfg_apply_wid(vif, start, wid, NULL, 0,
+ commit, drv_handler, false);
}
int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h
index eb7978166d73..10618327133c 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.h
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.h
@@ -320,30 +320,26 @@ enum ip_pkt_priority {
AC_BK_Q = 3
};
-struct txq_entry_t {
- struct list_head list;
- int type;
- u8 q_num;
- int ack_idx;
- u8 *buffer;
- int buffer_size;
- void *priv;
- int status;
- struct wilc_vif *vif;
- void (*tx_complete_func)(void *priv, int status);
+/* When queueing a tx packet, this info is stored in the sk_buff's
+ * control buffer (cb).
+ */
+struct wilc_skb_tx_cb {
+ u8 type; /* one of WILC_*_PKT */
+ enum ip_pkt_priority q_num; /* AC queue this packet is on */
+ int ack_idx; /* TCP ack index */
};
+static inline struct wilc_skb_tx_cb *WILC_SKB_TX_CB(struct sk_buff *skb)
+{
+ BUILD_BUG_ON(sizeof(struct wilc_skb_tx_cb) > sizeof(skb->cb));
+ return (struct wilc_skb_tx_cb *)&skb->cb[0];
+}
+
struct txq_fw_recv_queue_stat {
u8 acm;
u8 count;
};
-struct txq_handle {
- struct txq_entry_t txq_head;
- u16 count;
- struct txq_fw_recv_queue_stat fw;
-};
-
struct rxq_entry_t {
struct list_head list;
u8 *buffer;
@@ -376,12 +372,6 @@ struct wilc_hif_func {
#define WILC_MAX_CFG_FRAME_SIZE 1468
-struct tx_complete_data {
- int size;
- void *buff;
- struct sk_buff *skb;
-};
-
struct wilc_cfg_cmd_hdr {
u8 cmd_type;
u8 seq_no;
@@ -389,11 +379,6 @@ struct wilc_cfg_cmd_hdr {
__le32 driver_handler;
};
-struct wilc_cfg_frame {
- struct wilc_cfg_cmd_hdr hdr;
- u8 frame[WILC_MAX_CFG_FRAME_SIZE];
-};
-
struct wilc_cfg_rsp {
u8 type;
u8 seq_no;
@@ -405,19 +390,16 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
u32 buffer_size);
int wilc_wlan_start(struct wilc *wilc);
int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif);
-int wilc_wlan_txq_add_net_pkt(struct net_device *dev,
- struct tx_complete_data *tx_data, u8 *buffer,
- u32 buffer_size,
- void (*tx_complete_fn)(void *, int));
+int wilc_wlan_txq_add_net_pkt(struct net_device *dev, struct sk_buff *skb);
int wilc_wlan_handle_txq(struct wilc *wl, u32 *txq_count);
void wilc_handle_isr(struct wilc *wilc);
+struct sk_buff *wilc_wlan_alloc_skb(struct wilc_vif *vif, size_t len);
void wilc_wlan_cleanup(struct net_device *dev);
int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
u32 buffer_size, int commit, u32 drv_handler);
int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
u32 drv_handler);
-int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
- u32 buffer_size, void (*func)(void *, int));
+int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, struct sk_buff *skb);
void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value);
int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc);
netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *dev);
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