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wlan.c
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
* All rights reserved.
*/
#include <linux/if_ether.h>
#include <linux/ip.h>
#include <net/dsfield.h>
#include "cfg80211.h"
#include "wlan_cfg.h"
#define WAKE_UP_TRIAL_RETRY 10000
void acquire_bus(struct wilc *wilc, enum bus_acquire acquire, int source)
{
mutex_lock(&wilc->hif_cs);
if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP)
chip_wakeup(wilc, source);
}
void release_bus(struct wilc *wilc, enum bus_release release, int source)
{
if (release == WILC_BUS_RELEASE_ALLOW_SLEEP)
chip_allow_sleep(wilc, source);
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)
{
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);
list_del(&tqe->list);
wilc->txq_entries -= 1;
wilc->txq[q_num].count--;
}
spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
return tqe;
}
static void wilc_wlan_txq_add_to_tail(struct net_device *dev, u8 q_num,
struct txq_entry_t *tqe)
{
unsigned long flags;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc = vif->wilc;
spin_lock_irqsave(&wilc->txq_spinlock, flags);
list_add_tail(&tqe->list, &wilc->txq[q_num].txq_head.list);
wilc->txq_entries += 1;
wilc->txq[q_num].count++;
PRINT_INFO(vif->ndev, TX_DBG, "Number of entries in TxQ = %d\n",
wilc->txq_entries);
spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
PRINT_INFO(vif->ndev, TX_DBG, "Wake the txq_handling\n");
complete(&wilc->txq_event);
}
static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif, u8 q_num,
struct txq_entry_t *tqe)
{
unsigned long flags;
struct wilc *wilc = vif->wilc;
mutex_lock(&wilc->txq_add_to_head_cs);
spin_lock_irqsave(&wilc->txq_spinlock, flags);
list_add(&tqe->list, &wilc->txq[q_num].txq_head.list);
wilc->txq_entries += 1;
wilc->txq[q_num].count++;
PRINT_INFO(vif->ndev, TX_DBG, "Number of entries in TxQ = %d\n",
wilc->txq_entries);
spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
mutex_unlock(&wilc->txq_add_to_head_cs);
complete(&wilc->txq_event);
PRINT_INFO(vif->ndev, TX_DBG, "Wake up the txq_handler\n");
}
#define NOT_TCP_ACK (-1)
static inline void add_tcp_session(struct wilc_vif *vif, u32 src_prt,
u32 dst_prt, u32 seq)
{
struct tcp_ack_filter *f = &vif->ack_filter;
if (f->tcp_session < 2 * MAX_TCP_SESSION) {
f->ack_session_info[f->tcp_session].seq_num = seq;
f->ack_session_info[f->tcp_session].bigger_ack_num = 0;
f->ack_session_info[f->tcp_session].src_port = src_prt;
f->ack_session_info[f->tcp_session].dst_port = dst_prt;
f->tcp_session++;
PRINT_INFO(vif->ndev, TCP_ENH, "TCP Session %d to Ack %d\n",
f->tcp_session, seq);
}
}
static inline void update_tcp_session(struct wilc_vif *vif, u32 index, u32 ack)
{
struct tcp_ack_filter *f = &vif->ack_filter;
if (index < 2 * MAX_TCP_SESSION &&
ack > f->ack_session_info[index].bigger_ack_num)
f->ack_session_info[index].bigger_ack_num = ack;
}
static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
u32 session_index,
struct txq_entry_t *txqe)
{
struct tcp_ack_filter *f = &vif->ack_filter;
u32 i = f->pending_base + f->pending_acks_idx;
if (i < MAX_PENDING_ACKS) {
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;
f->pending_acks_idx++;
}
}
static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
{
void *buffer = tqe->buffer;
const struct ethhdr *eth_hdr_ptr = buffer;
int i;
unsigned long flags;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc = vif->wilc;
struct tcp_ack_filter *f = &vif->ack_filter;
const struct iphdr *ip_hdr_ptr;
const struct tcphdr *tcp_hdr_ptr;
u32 ihl, total_length, data_offset;
spin_lock_irqsave(&wilc->txq_spinlock, flags);
if (eth_hdr_ptr->h_proto != htons(ETH_P_IP))
goto out;
ip_hdr_ptr = buffer + ETH_HLEN;
if (ip_hdr_ptr->protocol != IPPROTO_TCP)
goto out;
ihl = ip_hdr_ptr->ihl << 2;
tcp_hdr_ptr = buffer + ETH_HLEN + ihl;
total_length = ntohs(ip_hdr_ptr->tot_len);
data_offset = tcp_hdr_ptr->doff << 2;
if (total_length == (ihl + data_offset)) {
u32 seq_no, ack_no;
seq_no = ntohl(tcp_hdr_ptr->seq);
ack_no = ntohl(tcp_hdr_ptr->ack_seq);
for (i = 0; i < f->tcp_session; i++) {
u32 j = f->ack_session_info[i].seq_num;
if (i < 2 * MAX_TCP_SESSION &&
j == seq_no) {
update_tcp_session(vif, i, ack_no);
break;
}
}
if (i == f->tcp_session)
add_tcp_session(vif, 0, 0, seq_no);
add_tcp_pending_ack(vif, ack_no, i, tqe);
}
out:
spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
}
static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
{
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc = vif->wilc;
struct tcp_ack_filter *f = &vif->ack_filter;
u32 i = 0;
u32 dropped = 0;
unsigned long flags;
spin_lock_irqsave(&wilc->txq_spinlock, flags);
for (i = f->pending_base;
i < (f->pending_base + f->pending_acks_idx); i++) {
u32 index;
u32 bigger_ack_num;
if (i >= MAX_PENDING_ACKS)
break;
index = f->pending_acks[i].session_index;
if (index >= 2 * MAX_TCP_SESSION)
break;
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;
PRINT_INFO(vif->ndev, TCP_ENH, "DROP ACK: %u\n",
f->pending_acks[i].ack_num);
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);
dropped++;
}
}
}
f->pending_acks_idx = 0;
f->tcp_session = 0;
if (f->pending_base == 0)
f->pending_base = MAX_TCP_SESSION;
else
f->pending_base = 0;
spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
while (dropped > 0) {
if (!wait_for_completion_timeout(&wilc->txq_event,
msecs_to_jiffies(1)))
PRINT_ER(vif->ndev, "completion timedout\n");
dropped--;
}
}
static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header)
{
struct net_device *mon_netdev = NULL;
struct wilc_vif *vif;
struct ieee80211_hdr *h = (struct ieee80211_hdr *)mac_header;
list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
if (vif->iftype == WILC_STATION_MODE)
if (ether_addr_equal_unaligned(h->addr2, vif->bssid))
return vif->ndev;
if (vif->iftype == WILC_AP_MODE)
if (ether_addr_equal_unaligned(h->addr1, vif->bssid))
return vif->ndev;
if (vif->iftype == WILC_MONITOR_MODE)
mon_netdev = vif->ndev;
}
if (!mon_netdev)
pr_warn("%s Invalid handle\n", __func__);
return mon_netdev;
}
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)
{
struct txq_entry_t *tqe;
struct wilc *wilc = vif->wilc;
PRINT_INFO(vif->ndev, TX_DBG, "Adding config packet ...\n");
if (wilc->quit) {
netdev_dbg(vif->ndev, "Return due to clear function\n");
complete(&wilc->cfg_event);
return 0;
}
if (!(wilc->initialized)) {
PRINT_INFO(vif->ndev, TX_DBG, "wilc not initialized\n");
complete(&wilc->cfg_event);
return 0;
}
tqe = kmalloc(sizeof(*tqe), GFP_KERNEL);
if (!tqe) {
complete(&wilc->cfg_event);
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;
PRINT_INFO(vif->ndev, TX_DBG,
"Adding the config packet at the Queue tail\n");
wilc_wlan_txq_add_to_head(vif, AC_VO_Q, tqe);
return 1;
}
static bool is_ac_q_limit(struct wilc *wl, u8 q_num)
{
u8 factors[NQUEUES] = {1, 1, 1, 1};
u16 i;
unsigned long flags;
struct wilc_tx_queue_status *q = &wl->tx_q_limit;
u8 end_index;
u8 q_limit;
bool ret = false;
spin_lock_irqsave(&wl->txq_spinlock, flags);
if (!q->initialized) {
for (i = 0; i < AC_BUFFER_SIZE; i++)
q->buffer[i] = i % NQUEUES;
for (i = 0; i < NQUEUES; i++) {
q->cnt[i] = AC_BUFFER_SIZE * factors[i] / NQUEUES;
q->sum += q->cnt[i];
}
q->end_index = AC_BUFFER_SIZE - 1;
q->initialized = 1;
}
end_index = q->end_index;
q->cnt[q->buffer[end_index]] -= factors[q->buffer[end_index]];
q->cnt[q_num] += factors[q_num];
q->sum += (factors[q_num] - factors[q->buffer[end_index]]);
q->buffer[end_index] = q_num;
if (end_index > 0)
q->end_index--;
else
q->end_index = AC_BUFFER_SIZE - 1;
if (!q->sum)
q_limit = 1;
else
q_limit = (q->cnt[q_num] * FLOW_CONTROL_UPPER_THRESHOLD / q->sum) + 1;
if (wl->txq[q_num].count <= q_limit)
ret = true;
spin_unlock_irqrestore(&wl->txq_spinlock, flags);
return ret;
}
static inline u8 ac_classify(struct wilc *wilc, struct sk_buff *skb)
{
u8 q_num = AC_BE_Q;
u8 dscp;
switch (skb->protocol) {
case htons(ETH_P_IP):
dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
break;
case htons(ETH_P_IPV6):
dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
break;
default:
return q_num;
}
switch (dscp) {
case 0x08:
case 0x20:
case 0x40:
q_num = AC_BK_Q;
break;
case 0x80:
case 0xA0:
case 0x28:
q_num = AC_VI_Q;
break;
case 0xC0:
case 0xD0:
case 0xE0:
case 0x88:
case 0xB8:
q_num = AC_VO_Q;
break;
}
return q_num;
}
static inline int ac_balance(struct wilc *wl, u8 *ratio)
{
u8 i, max_count = 0;
if (!ratio)
return -EINVAL;
for (i = 0; i < NQUEUES; i++)
if (wl->txq[i].fw.count > max_count)
max_count = wl->txq[i].fw.count;
for (i = 0; i < NQUEUES; i++)
ratio[i] = max_count - wl->txq[i].fw.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);
}
static inline u8 ac_change(struct wilc *wilc, u8 *ac)
{
do {
if (wilc->txq[*ac].fw.acm == 0)
return 0;
(*ac)++;
} while (*ac < NQUEUES);
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))
{
struct txq_entry_t *tqe;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc;
u8 q_num;
wilc = vif->wilc;
if (wilc->quit) {
PRINT_INFO(vif->ndev, TX_DBG,
"drv is quitting, return from net_pkt\n");
tx_complete_fn(tx_data, 0);
return 0;
}
if (!wilc->initialized) {
PRINT_INFO(vif->ndev, TX_DBG,
"not_init, return from net_pkt\n");
tx_complete_fn(tx_data, 0);
return 0;
}
tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
if (!tqe) {
PRINT_INFO(vif->ndev, TX_DBG,
"malloc failed, return from net_pkt\n");
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)) {
PRINT_INFO(vif->ndev, GENERIC_DBG,
"No suitable non-ACM queue\n");
tx_complete_fn(tx_data, 0);
kfree(tqe);
return 0;
}
if (is_ac_q_limit(wilc, q_num)) {
PRINT_INFO(vif->ndev, TX_DBG,
"Adding mgmt packet at the Queue tail\n");
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);
} else {
tx_complete_fn(tx_data, 0);
kfree(tqe);
}
return 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))
{
struct txq_entry_t *tqe;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc;
wilc = vif->wilc;
if (wilc->quit) {
PRINT_INFO(vif->ndev, TX_DBG, "drv is quitting\n");
tx_complete_fn(priv, 0);
return 0;
}
if (!wilc->initialized) {
PRINT_INFO(vif->ndev, TX_DBG, "wilc not_init\n");
tx_complete_fn(priv, 0);
return 0;
}
tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
if (!tqe) {
PRINT_INFO(vif->ndev, TX_DBG, "Queue malloc failed\n");
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;
PRINT_INFO(vif->ndev, TX_DBG, "Adding Mgmt packet to Queue tail\n");
wilc_wlan_txq_add_to_tail(dev, 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)
return;
mutex_lock(&wilc->rxq_cs);
list_add_tail(&rqe->list, &wilc->rxq_head.list);
mutex_unlock(&wilc->rxq_cs);
}
static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
{
struct rxq_entry_t *rqe = NULL;
mutex_lock(&wilc->rxq_cs);
if (!list_empty(&wilc->rxq_head.list)) {
rqe = list_first_entry(&wilc->rxq_head.list, struct rxq_entry_t,
list);
list_del(&rqe->list);
}
mutex_unlock(&wilc->rxq_cs);
return rqe;
}
static int chip_allow_sleep_wilc1000(struct wilc *wilc, int source)
{
u32 reg = 0;
const struct wilc_hif_func *hif_func = wilc->hif_func;
u32 wakeup_reg, wakeup_bit;
u32 to_host_from_fw_reg, to_host_from_fw_bit;
u32 from_host_to_fw_reg, from_host_to_fw_bit;
u32 trials = 100;
int ret;
if (wilc->io_type == WILC_HIF_SDIO ||
wilc->io_type == WILC_HIF_SDIO_GPIO_IRQ) {
wakeup_reg = WILC1000_SDIO_WAKEUP_REG;
wakeup_bit = WILC1000_SDIO_WAKEUP_BIT;
from_host_to_fw_reg = WILC_SDIO_HOST_TO_FW_REG;
from_host_to_fw_bit = WILC_SDIO_HOST_TO_FW_BIT;
to_host_from_fw_reg = WILC_SDIO_FW_TO_HOST_REG;
to_host_from_fw_bit = WILC_SDIO_FW_TO_HOST_BIT;
} else {
wakeup_reg = WILC1000_SPI_WAKEUP_REG;
wakeup_bit = WILC1000_SPI_WAKEUP_BIT;
from_host_to_fw_reg = WILC_SPI_HOST_TO_FW_REG;
from_host_to_fw_bit = WILC_SPI_HOST_TO_FW_BIT;
to_host_from_fw_reg = WILC_SPI_FW_TO_HOST_REG;
to_host_from_fw_bit = WILC_SPI_FW_TO_HOST_BIT;
}
while (--trials) {
ret = hif_func->hif_read_reg(wilc, to_host_from_fw_reg, ®);
if (ret)
return ret;
if ((reg & to_host_from_fw_bit) == 0)
break;
}
if (!trials)
pr_warn("FW not responding\n");
/* Clear bit 1 */
ret = hif_func->hif_read_reg(wilc, wakeup_reg, ®);
if (ret)
return ret;
if (reg & wakeup_bit) {
reg &= ~wakeup_bit;
ret = hif_func->hif_write_reg(wilc, wakeup_reg, reg);
if (ret)
return ret;
}
ret = hif_func->hif_read_reg(wilc, from_host_to_fw_reg, ®);
if (ret)
return ret;
if (reg & from_host_to_fw_bit) {
reg &= ~from_host_to_fw_bit;
ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg, reg);
if (ret)
return ret;
}
return 0;
}
static int chip_allow_sleep_wilc3000(struct wilc *wilc, int source)
{
u32 reg = 0;
int ret;
const struct wilc_hif_func *hif_func = wilc->hif_func;
if (wilc->io_type == WILC_HIF_SDIO ||
wilc->io_type == WILC_HIF_SDIO_GPIO_IRQ) {
ret = hif_func->hif_read_reg(wilc, WILC3000_SDIO_WAKEUP_REG,
®);
if (ret)
return ret;
ret = hif_func->hif_write_reg(wilc, WILC3000_SDIO_WAKEUP_REG,
reg & ~WILC3000_SDIO_WAKEUP_BIT);
if (ret)
return ret;
} else {
ret = hif_func->hif_read_reg(wilc, WILC3000_SPI_WAKEUP_REG,
®);
if (ret)
return ret;
ret = hif_func->hif_write_reg(wilc, WILC3000_SPI_WAKEUP_REG,
reg & ~WILC3000_SPI_WAKEUP_BIT);
if (ret)
return ret;
}
return 0;
}
void chip_allow_sleep(struct wilc *wilc, int source)
{
int ret = 0;
if (((source == DEV_WIFI) && (wilc->keep_awake[DEV_BT] == true)) ||
((source == DEV_BT) && (wilc->keep_awake[DEV_WIFI] == true)))
pr_warn("Another device is preventing allow sleep operation. request source is %s\n",
(source == DEV_WIFI ? "Wifi" : "BT"));
else
if (wilc->chip == WILC_1000)
ret = chip_allow_sleep_wilc1000(wilc, source);
else
ret = chip_allow_sleep_wilc3000(wilc, source);
if (!ret)
wilc->keep_awake[source] = false;
}
static void chip_wakeup_wilc1000(struct wilc *wilc, int source)
{
u32 ret = 0;
u32 clk_status_val = 0, trials = 0;
u32 wakeup_reg, wakeup_bit;
u32 clk_status_reg, clk_status_bit;
u32 from_host_to_fw_reg, from_host_to_fw_bit;
const struct wilc_hif_func *hif_func = wilc->hif_func;
if (wilc->io_type == WILC_HIF_SDIO ||
wilc->io_type == WILC_HIF_SDIO_GPIO_IRQ) {
wakeup_reg = WILC1000_SDIO_WAKEUP_REG;
wakeup_bit = WILC1000_SDIO_WAKEUP_BIT;
clk_status_reg = WILC1000_SDIO_CLK_STATUS_REG;
clk_status_bit = WILC1000_SDIO_CLK_STATUS_BIT;
from_host_to_fw_reg = WILC_SDIO_HOST_TO_FW_REG;
from_host_to_fw_bit = WILC_SDIO_HOST_TO_FW_BIT;
} else {
wakeup_reg = WILC1000_SPI_WAKEUP_REG;
wakeup_bit = WILC1000_SPI_WAKEUP_BIT;
clk_status_reg = WILC1000_SPI_CLK_STATUS_REG;
clk_status_bit = WILC1000_SPI_CLK_STATUS_BIT;
from_host_to_fw_reg = WILC_SPI_HOST_TO_FW_REG;
from_host_to_fw_bit = WILC_SPI_HOST_TO_FW_BIT;
}
/* indicate host wakeup */
ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg,
from_host_to_fw_bit);
if (ret)
return;
/* Set wake-up bit */
ret = hif_func->hif_write_reg(wilc, wakeup_reg,
wakeup_bit);
if (ret)
return;
while (trials < WAKE_UP_TRIAL_RETRY) {
ret = hif_func->hif_read_reg(wilc, clk_status_reg,
&clk_status_val);
if (ret) {
pr_err("Bus error %d %x\n", ret, clk_status_val);
return;
}
if (clk_status_val & clk_status_bit)
break;
trials++;
}
if (trials >= WAKE_UP_TRIAL_RETRY) {
pr_err("Failed to wake-up the chip\n");
return;
}
/* Sometimes spi fail to read clock regs after reading
* writing clockless registers
*/
if (wilc->io_type == WILC_HIF_SPI)
wilc->hif_func->hif_reset(wilc);
}
static void chip_wakeup_wilc3000(struct wilc *wilc, int source)
{
u32 wakeup_reg_val, clk_status_reg_val, trials = 0;
u32 wakeup_reg, wakeup_bit;
u32 clk_status_reg, clk_status_bit;
int wake_seq_trials = 5;
const struct wilc_hif_func *hif_func = wilc->hif_func;
if (wilc->io_type == WILC_HIF_SDIO ||
wilc->io_type == WILC_HIF_SDIO_GPIO_IRQ) {
wakeup_reg = WILC3000_SDIO_WAKEUP_REG;
wakeup_bit = WILC3000_SDIO_WAKEUP_BIT;
clk_status_reg = WILC3000_SDIO_CLK_STATUS_REG;
clk_status_bit = WILC3000_SDIO_CLK_STATUS_BIT;
} else {
wakeup_reg = WILC3000_SPI_WAKEUP_REG;
wakeup_bit = WILC3000_SPI_WAKEUP_BIT;
clk_status_reg = WILC3000_SPI_CLK_STATUS_REG;
clk_status_bit = WILC3000_SPI_CLK_STATUS_BIT;
}
hif_func->hif_read_reg(wilc, wakeup_reg, &wakeup_reg_val);
do {
hif_func->hif_write_reg(wilc, wakeup_reg, wakeup_reg_val |
wakeup_bit);
/* Check the clock status */
hif_func->hif_read_reg(wilc, clk_status_reg,
&clk_status_reg_val);
/*
* in case of clocks off, wait 1ms, and check it again.
* if still off, wait for another 1ms, for a total wait of 3ms.
* If still off, redo the wake up sequence
*/
while ((clk_status_reg_val & clk_status_bit) == 0 &&
(++trials % 4) != 0) {
/* Wait for the chip to stabilize*/
usleep_range(1000, 1100);
/*
* Make sure chip is awake. This is an extra step that
* can be removed later to avoid the bus access
* overhead
*/
hif_func->hif_read_reg(wilc, clk_status_reg,
&clk_status_reg_val);
}
/* in case of failure, Reset the wakeup bit to introduce a new
* edge on the next loop
*/
if ((clk_status_reg_val & clk_status_bit) == 0) {
hif_func->hif_write_reg(wilc, wakeup_reg,
wakeup_reg_val & (~wakeup_bit));
/* added wait before wakeup sequence retry */
usleep_range(200, 300);
}
} while (((clk_status_reg_val & clk_status_bit) == 0)
&& (wake_seq_trials-- > 0));
if (!wake_seq_trials)
dev_err(wilc->dev, "clocks still OFF. Wake up failed\n");
wilc->keep_awake[source] = true;
}
void chip_wakeup(struct wilc *wilc, int source)
{
if (wilc->chip == WILC_1000)
chip_wakeup_wilc1000(wilc, source);
else
chip_wakeup_wilc3000(wilc, source);
}
void host_wakeup_notify(struct wilc *wilc, int source)
{
acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY, source);
if (wilc->chip == WILC_1000)
wilc->hif_func->hif_write_reg(wilc, WILC1000_CORTUS_INTERRUPT_2,
1);
else
wilc->hif_func->hif_write_reg(wilc, WILC3000_CORTUS_INTERRUPT_2,
1);
release_bus(wilc, WILC_BUS_RELEASE_ONLY, source);
}
void host_sleep_notify(struct wilc *wilc, int source)
{
acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY, source);
if (wilc->chip == WILC_1000)
wilc->hif_func->hif_write_reg(wilc, WILC1000_CORTUS_INTERRUPT_1,
1);
else
wilc->hif_func->hif_write_reg(wilc, WILC3000_CORTUS_INTERRUPT_1,
1);
release_bus(wilc, WILC_BUS_RELEASE_ONLY, source);
}
int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
{
int i, entries = 0;
u8 k, ac;
u32 sum;
u32 reg;
u8 ac_desired_ratio[NQUEUES] = {0, 0, 0, 0};
u8 ac_preserve_ratio[NQUEUES] = {1, 1, 1, 1};
u8 *num_pkts_to_add;
u8 vmm_entries_ac[WILC_VMM_TBL_SIZE];
u32 offset = 0;
bool max_size_over = 0, ac_exist = 0;
int vmm_sz = 0;
struct txq_entry_t *tqe_q[NQUEUES];
int ret = 0;
int counter;
int timeout;
u32 *vmm_table = wilc->vmm_table;
u8 ac_pkt_num_to_chip[NQUEUES] = {0, 0, 0, 0};
const struct wilc_hif_func *func;
int srcu_idx;
u8 *txb = wilc->tx_buffer;
struct wilc_vif *vif;
if (!wilc->txq_entries) {
*txq_count = 0;
return 0;
}
if (wilc->quit)
goto out_update_cnt;
if (ac_balance(wilc, ac_desired_ratio))
return -EINVAL;
mutex_lock(&wilc->txq_add_to_head_cs);
srcu_idx = srcu_read_lock(&wilc->srcu);
list_for_each_entry_rcu(vif, &wilc->vif_list, list)
wilc_wlan_txq_filter_dup_tcp_ack(vif->ndev);
srcu_read_unlock(&wilc->srcu, srcu_idx);
for (ac = 0; ac < NQUEUES; ac++)
tqe_q[ac] = wilc_wlan_txq_get_first(wilc, ac);
i = 0;
sum = 0;
max_size_over = 0;
num_pkts_to_add = ac_desired_ratio;
do {
ac_exist = 0;
for (ac = 0; (ac < NQUEUES) && (!max_size_over); ac++) {
if (!tqe_q[ac])
continue;
ac_exist = 1;
for (k = 0; (k < num_pkts_to_add[ac]) &&
(!max_size_over) && tqe_q[ac]; k++) {
if (i >= (WILC_VMM_TBL_SIZE - 1)) {
max_size_over = 1;
break;
}
if (tqe_q[ac]->type == WILC_CFG_PKT)
vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
else if (tqe_q[ac]->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 = ALIGN(vmm_sz, 4);
if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE) {
max_size_over = 1;
break;
}
vmm_table[i] = vmm_sz / 4;
if (tqe_q[ac]->type == WILC_CFG_PKT)
vmm_table[i] |= BIT(10);
cpu_to_le32s(&vmm_table[i]);
vmm_entries_ac[i] = ac;
i++;
sum += vmm_sz;
tqe_q[ac] = wilc_wlan_txq_get_next(wilc,
tqe_q[ac],
ac);
}
}
num_pkts_to_add = ac_preserve_ratio;
} while (!max_size_over && ac_exist);
if (i == 0)
goto out_unlock;
vmm_table[i] = 0x0;
acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP, DEV_WIFI);
counter = 0;
func = wilc->hif_func;
do {
ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, ®);
if (ret)
break;
if ((reg & 0x1) == 0) {
ac_update_fw_ac_pkt_info(wilc, reg);
break;
}
counter++;
if (counter > 200) {
counter = 0;
ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
break;
}
} while (!wilc->quit);
if (ret)
goto out_release_bus;
timeout = 200;