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esp_sip.c
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esp_sip.c
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/*
* Copyright (c) 2009 - 2014 Espressif System.
*
* Serial Interconnctor Protocol
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/ieee80211.h>
#include <net/mac80211.h>
#include <net/cfg80211.h>
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <linux/version.h>
#include <linux/mmc/card.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/sd.h>
#include <linux/completion.h>
#include <linux/timer.h>
#include "esp_mac80211.h"
#include "esp_pub.h"
#include "esp_sip.h"
#include "esp_ctrl.h"
#include "esp_sif.h"
#include "esp_debug.h"
#include "slc_host_register.h"
#include "esp_wmac.h"
#include "esp_utils.h"
#ifdef USE_EXT_GPIO
#include "esp_ext.h"
#endif /* USE_EXT_GPIO */
extern struct completion *gl_bootup_cplx;
static int old_signal = -35;
static int avg_signal = 0;
static int signal_loop = 0;
struct esp_mac_prefix esp_mac_prefix_table[] = {
{0, {0x18, 0xfe, 0x34}},
{1, {0xac, 0xd0, 0x74}},
{255, {0x18, 0xfe, 0x34}},
};
#define SIGNAL_COUNT 300
#define TID_TO_AC(_tid) ((_tid)== 0||((_tid)==3)?WME_AC_BE:((_tid)<3)?WME_AC_BK:((_tid)<6)?WME_AC_VI:WME_AC_VO)
#ifdef SIP_DEBUG
#define esp_sip_dbg esp_dbg
struct sip_trace {
u32 tx_data;
u32 tx_cmd;
u32 rx_data;
u32 rx_evt;
u32 rx_tx_status;
u32 tx_out_of_credit;
u32 tx_one_shot_overflow;
};
static struct sip_trace str;
#define STRACE_TX_DATA_INC() (str.tx_data++)
#define STRACE_TX_CMD_INC() (str.tx_cmd++)
#define STRACE_RX_DATA_INC() (str.rx_data++)
#define STRACE_RX_EVENT_INC() (str.rx_evt++)
#define STRACE_RX_TXSTATUS_INC() (str.rx_tx_status++)
#define STRACE_TX_OUT_OF_CREDIT_INC() (str.tx_out_of_credit++)
#define STRACE_TX_ONE_SHOT_INC() (str.tx_one_shot_overflow++)
#define STRACE_SHOW(sip)
#else
#define esp_sip_dbg(...)
#define STRACE_TX_DATA_INC()
#define STRACE_TX_CMD_INC()
#define STRACE_RX_DATA_INC()
#define STRACE_RX_EVENT_INC()
#define STRACE_RX_TXSTATUS_INC()
#define STRACE_TX_OUT_OF_CREDIT_INC()
#define STRACE_TX_ONE_SHOT_INC()
#define STRACE_SHOW(sip)
#endif /* SIP_DEBUG */
#define SIP_STOP_QUEUE_THRESHOLD 48
#define SIP_RESUME_QUEUE_THRESHOLD 12
#define SIP_MIN_DATA_PKT_LEN (sizeof(struct esp_mac_rx_ctrl) + 24) //24 is min 80211hdr
#ifdef ESP_PREALLOC
extern struct sk_buff *esp_get_sip_skb(int size);
extern void esp_put_sip_skb(struct sk_buff **skb);
extern u8 *esp_get_tx_aggr_buf(void);
extern void esp_put_tx_aggr_buf(u8 ** p);
#endif
static void sip_recalc_credit_init(struct esp_sip *sip);
static int sip_recalc_credit_claim(struct esp_sip *sip, int force);
static void sip_recalc_credit_release(struct esp_sip *sip);
static struct sip_pkt *sip_get_ctrl_buf(struct esp_sip *sip,
SIP_BUF_TYPE bftype);
static void sip_reclaim_ctrl_buf(struct esp_sip *sip, struct sip_pkt *pkt,
SIP_BUF_TYPE bftype);
static void sip_free_init_ctrl_buf(struct esp_sip *sip);
static int sip_pack_pkt(struct esp_sip *sip, struct sk_buff *skb,
int *pm_state);
static struct esp_mac_rx_ctrl *sip_parse_normal_mac_ctrl(struct sk_buff
*skb,
int *pkt_len_enc,
int *buf_len,
int *pulled_len);
static struct sk_buff *sip_parse_data_rx_info(struct esp_sip *sip,
struct sk_buff *skb,
int pkt_len_enc, int buf_len,
struct esp_mac_rx_ctrl
*mac_ctrl, int *pulled_len);
static inline void sip_rx_pkt_enqueue(struct esp_sip *sip,
struct sk_buff *skb);
static void sip_after_write_pkts(struct esp_sip *sip);
static void sip_update_tx_credits(struct esp_sip *sip,
u16 recycled_credits);
//static void sip_trigger_txq_process(struct esp_sip *sip);
static bool sip_rx_pkt_process(struct esp_sip *sip, struct sk_buff *skb);
static void sip_tx_status_report(struct esp_sip *sip, struct sk_buff *skb,
struct ieee80211_tx_info *tx_info,
bool success);
#ifdef FPGA_TXDATA
int sip_send_tx_data(struct esp_sip *sip);
#endif /* FPGA_TXDATA */
#ifdef FPGA_LOOPBACK
int sip_send_loopback_cmd_mblk(struct esp_sip *sip);
#endif /* FPGA_LOOPBACK */
static bool check_ac_tid(u8 * pkt, u8 ac, u8 tid)
{
struct ieee80211_hdr *wh = (struct ieee80211_hdr *) pkt;
#ifdef TID_DEBUG
u16 real_tid = 0;
#endif //TID_DEBUG
if (ieee80211_is_data_qos(wh->frame_control)) {
#ifdef TID_DEBUG
real_tid =
*ieee80211_get_qos_ctl(wh) &
IEEE80211_QOS_CTL_TID_MASK;
esp_sip_dbg(ESP_SHOW, "ac:%u, tid:%u, tid in pkt:%u\n", ac,
tid, real_tid);
if (tid != real_tid) {
esp_sip_dbg(ESP_DBG_ERROR,
"111 ac:%u, tid:%u, tid in pkt:%u\n",
ac, tid, real_tid);
}
if (TID_TO_AC(tid) != ac) {
esp_sip_dbg(ESP_DBG_ERROR,
"222 ac:%u, tid:%u, tid in pkt:%u\n",
ac, tid, real_tid);
}
#endif /* TID_DEBUG */
} else if (ieee80211_is_mgmt(wh->frame_control)) {
#ifdef TID_DEBUG
esp_sip_dbg(ESP_SHOW, "ac:%u, tid:%u\n", ac, tid);
if (tid != 7 || ac != WME_AC_VO) {
esp_sip_dbg(ESP_DBG_ERROR, "333 ac:%u, tid:%u\n",
ac, tid);
}
#endif /* TID_DEBUG */
} else {
if (ieee80211_is_ctl(wh->frame_control)) {
#ifdef TID_DEBUG
esp_sip_dbg(ESP_SHOW,
"%s is ctrl pkt fc 0x%04x ac:%u, tid:%u, tid in pkt:%u\n",
__func__, wh->frame_control, ac, tid,
real_tid);
#endif /* TID_DEBUG */
} else {
if (tid != 0 || ac != WME_AC_BE) {
//show_buf(pkt, 24);
esp_sip_dbg(ESP_DBG_LOG,
"444 ac:%u, tid:%u \n", ac,
tid);
if (tid == 7 && ac == WME_AC_VO)
return false;
}
return true; //hack to modify non-qos null data.
}
}
return false;
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
static void sip_recalc_credit_timeout(struct timer_list *t)
#else
static void sip_recalc_credit_timeout(unsigned long data)
#endif
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
struct esp_sip *sip = from_timer(sip, t, credit_timer);
#else
struct esp_sip *sip = (struct esp_sip *) data;
#endif
esp_dbg(ESP_DBG_ERROR, "rct");
sip_recalc_credit_claim(sip, 1); /* recalc again */
}
static void sip_recalc_credit_init(struct esp_sip *sip)
{
atomic_set(&sip->credit_status, RECALC_CREDIT_DISABLE); //set it disable
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
timer_setup(&sip->credit_timer, sip_recalc_credit_timeout, 0);
#else
init_timer(&sip->credit_timer);
sip->credit_timer.data = (unsigned long) sip;
sip->credit_timer.function = sip_recalc_credit_timeout;
#endif
}
static int sip_recalc_credit_claim(struct esp_sip *sip, int force)
{
int ret;
if (atomic_read(&sip->credit_status) == RECALC_CREDIT_ENABLE
&& force == 0)
return 1;
atomic_set(&sip->credit_status, RECALC_CREDIT_ENABLE);
ret = sip_send_recalc_credit(sip->epub);
if (ret) {
esp_dbg(ESP_DBG_ERROR, "%s error %d", __func__, ret);
return ret;
}
/*setup a timer for handle the abs_credit not receive */
mod_timer(&sip->credit_timer, jiffies + msecs_to_jiffies(2000));
esp_dbg(ESP_SHOW, "rcc");
return ret;
}
static void sip_recalc_credit_release(struct esp_sip *sip)
{
esp_dbg(ESP_SHOW, "rcr");
if (atomic_read(&sip->credit_status) == RECALC_CREDIT_ENABLE) {
atomic_set(&sip->credit_status, RECALC_CREDIT_DISABLE);
del_timer_sync(&sip->credit_timer);
} else
esp_dbg(ESP_SHOW, "maybe bogus credit");
}
static void sip_update_tx_credits(struct esp_sip *sip,
u16 recycled_credits)
{
esp_sip_dbg(ESP_DBG_TRACE, "%s:before add, credits is %d\n",
__func__, atomic_read(&sip->tx_credits));
if (recycled_credits & 0x800) {
atomic_set(&sip->tx_credits, (recycled_credits & 0x7ff));
sip_recalc_credit_release(sip);
} else
atomic_add(recycled_credits, &sip->tx_credits);
esp_sip_dbg(ESP_DBG_TRACE, "%s:after add %d, credits is %d\n",
__func__, recycled_credits,
atomic_read(&sip->tx_credits));
}
void sip_trigger_txq_process(struct esp_sip *sip)
{
if (atomic_read(&sip->tx_credits) <= sip->credit_to_reserve + SIP_CTRL_CREDIT_RESERVE //no credits, do nothing
|| atomic_read(&sip->credit_status) == RECALC_CREDIT_ENABLE)
return;
if (sip_queue_may_resume(sip)) {
/* wakeup upper queue only if we have sufficient credits */
esp_sip_dbg(ESP_DBG_TRACE, "%s wakeup ieee80211 txq \n",
__func__);
atomic_set(&sip->epub->txq_stopped, false);
ieee80211_wake_queues(sip->epub->hw);
} else if (atomic_read(&sip->epub->txq_stopped)) {
esp_sip_dbg(ESP_DBG_TRACE,
"%s can't wake txq, credits: %d \n", __func__,
atomic_read(&sip->tx_credits));
}
if (!skb_queue_empty(&sip->epub->txq)) {
/* try to send out pkt already in sip queue once we have credits */
esp_sip_dbg(ESP_DBG_TRACE, "%s resume sip txq \n",
__func__);
#if !defined(FPGA_TXDATA)
if (sif_get_ate_config() == 0) {
ieee80211_queue_work(sip->epub->hw,
&sip->epub->tx_work);
} else {
queue_work(sip->epub->esp_wkq,
&sip->epub->tx_work);
}
#else
queue_work(sip->epub->esp_wkq, &sip->epub->tx_work);
#endif
}
}
static bool sip_ampdu_occupy_buf(struct esp_sip *sip,
struct esp_rx_ampdu_len *ampdu_len)
{
return (ampdu_len->substate == 0
|| esp_wmac_rxsec_error(ampdu_len->substate)
|| (sip->dump_rpbm_err
&& ampdu_len->substate == RX_RPBM_ERR));
}
static bool sip_rx_pkt_process(struct esp_sip *sip, struct sk_buff *skb)
{
#define DO_NOT_COPY false
#define DO_COPY true
struct sip_hdr *hdr = NULL;
struct sk_buff *rskb = NULL;
int remains_len = 0;
int first_pkt_len = 0;
u8 *bufptr = NULL;
int ret = 0;
bool trigger_rxq = false;
if (skb == NULL) {
esp_sip_dbg(ESP_DBG_ERROR, "%s NULL SKB!!!!!!!! \n",
__func__);
return trigger_rxq;
}
hdr = (struct sip_hdr *) skb->data;
bufptr = skb->data;
esp_sip_dbg(ESP_DBG_TRACE, "%s Hcredits 0x%08x, realCredits %d\n",
__func__, hdr->h_credits,
hdr->h_credits & SIP_CREDITS_MASK);
if (hdr->h_credits & SIP_CREDITS_MASK) {
sip_update_tx_credits(sip,
hdr->h_credits & SIP_CREDITS_MASK);
}
hdr->h_credits &= ~SIP_CREDITS_MASK; /* clean credits in sip_hdr, prevent over-add */
esp_sip_dbg(ESP_DBG_TRACE, "%s credits %d\n", __func__,
hdr->h_credits);
/*
* first pkt's length is stored in recycled_credits first 20 bits
* config w3 [31:12]
* repair hdr->len of first pkt
*/
remains_len = hdr->len;
first_pkt_len = hdr->h_credits >> 12;
hdr->len = first_pkt_len;
esp_dbg(ESP_DBG_TRACE, "%s first_pkt_len %d, whole pkt len %d \n",
__func__, first_pkt_len, remains_len);
if (first_pkt_len > remains_len) {
sip_recalc_credit_claim(sip, 0);
esp_dbg(ESP_DBG_ERROR,
"first_pkt_len %d, whole pkt len %d\n",
first_pkt_len, remains_len);
show_buf((u8 *) hdr, first_pkt_len);
ESSERT(0);
goto _exit;
}
/*
* pkts handling, including the first pkt, should alloc new skb for each data pkt.
* free the original whole skb after parsing is done.
*/
while (remains_len) {
if (remains_len < sizeof(struct sip_hdr)) {
sip_recalc_credit_claim(sip, 0);
ESSERT(0);
show_buf((u8 *) hdr, 512);
goto _exit;
}
hdr = (struct sip_hdr *) bufptr;
if (hdr->len <= 0) {
sip_recalc_credit_claim(sip, 0);
show_buf((u8 *) hdr, 512);
ESSERT(0);
goto _exit;
}
if ((hdr->len & 3) != 0) {
sip_recalc_credit_claim(sip, 0);
show_buf((u8 *) hdr, 512);
ESSERT(0);
goto _exit;
}
if (unlikely(hdr->seq != sip->rxseq++)) {
sip_recalc_credit_claim(sip, 0);
esp_dbg(ESP_DBG_ERROR,
"%s seq mismatch! got %u, expect %u\n",
__func__, hdr->seq, sip->rxseq - 1);
sip->rxseq = hdr->seq + 1;
show_buf(bufptr, 32);
ESSERT(0);
}
if (SIP_HDR_IS_CTRL(hdr)) {
STRACE_RX_EVENT_INC();
esp_sip_dbg(ESP_DBG_TRACE, "seq %u \n", hdr->seq);
ret = sip_parse_events(sip, bufptr);
skb_pull(skb, hdr->len);
} else if (SIP_HDR_IS_DATA(hdr)) {
struct esp_mac_rx_ctrl *mac_ctrl = NULL;
int pkt_len_enc = 0, buf_len = 0, pulled_len = 0;
STRACE_RX_DATA_INC();
esp_sip_dbg(ESP_DBG_TRACE, "seq %u \n", hdr->seq);
mac_ctrl =
sip_parse_normal_mac_ctrl(skb, &pkt_len_enc,
&buf_len,
&pulled_len);
rskb =
sip_parse_data_rx_info(sip, skb, pkt_len_enc,
buf_len, mac_ctrl,
&pulled_len);
if (rskb == NULL)
goto _move_on;
if (likely(atomic_read(&sip->epub->wl.off) == 0)) {
#ifdef RX_CHECKSUM_TEST
esp_rx_checksum_test(rskb);
#endif
local_bh_disable();
ieee80211_rx(sip->epub->hw, rskb);
local_bh_enable();
} else {
/* still need go thro parsing as skb_pull should invoke */
kfree_skb(rskb);
}
} else if (SIP_HDR_IS_AMPDU(hdr)) {
struct esp_mac_rx_ctrl *mac_ctrl = NULL;
struct esp_mac_rx_ctrl new_mac_ctrl;
struct esp_rx_ampdu_len *ampdu_len;
int pkt_num;
int pulled_len = 0;
static int pkt_dropped = 0;
static int pkt_total = 0;
bool have_rxabort = false;
bool have_goodpkt = false;
static u8 frame_head[16];
static u8 frame_buf_ttl = 0;
ampdu_len =
(struct esp_rx_ampdu_len *) (skb->data +
hdr->len /
sip->rx_blksz *
sip->rx_blksz);
esp_sip_dbg(ESP_DBG_TRACE,
"%s rx ampdu total len %u\n", __func__,
hdr->len);
if (skb->data != (u8 *) hdr) {
printk("%p %p\n", skb->data, hdr);
show_buf(skb->data, 512);
show_buf((u8 *) hdr, 512);
ESSERT(0);
goto _exit;
}
mac_ctrl =
sip_parse_normal_mac_ctrl(skb, NULL, NULL,
&pulled_len);
memcpy(&new_mac_ctrl, mac_ctrl,
sizeof(struct esp_mac_rx_ctrl));
mac_ctrl = &new_mac_ctrl;
pkt_num = mac_ctrl->ampdu_cnt;
esp_sip_dbg(ESP_DBG_TRACE,
"%s %d rx ampdu %u pkts, %d pkts dumped, first len %u\n",
__func__, __LINE__,
(unsigned
int) ((hdr->len % sip->rx_blksz) /
sizeof(struct
esp_rx_ampdu_len)),
pkt_num,
(unsigned int) ampdu_len->sublen);
pkt_total += mac_ctrl->ampdu_cnt;
//esp_sip_dbg(ESP_DBG_ERROR, "%s ampdu dropped %d/%d\n", __func__, pkt_dropped, pkt_total);
while (pkt_num > 0) {
esp_sip_dbg(ESP_DBG_TRACE,
"%s %d ampdu sub state %02x,\n",
__func__, __LINE__,
ampdu_len->substate);
if (sip_ampdu_occupy_buf(sip, ampdu_len)) { //pkt is dumped
rskb =
sip_parse_data_rx_info(sip,
skb,
ampdu_len->
sublen -
FCS_LEN,
0,
mac_ctrl,
&pulled_len);
if (!rskb) {
ESSERT(0);
goto _exit;
}
if (likely
(atomic_read
(&sip->epub->wl.off) == 0)
&& (ampdu_len->substate == 0
|| ampdu_len->substate ==
RX_TKIPMIC_ERR
|| (sip->sendup_rpbm_pkt
&& ampdu_len->
substate ==
RX_RPBM_ERR))
&& (sip->rxabort_fixed
|| !have_rxabort)) {
if (!have_goodpkt) {
have_goodpkt =
true;
memcpy(frame_head,
rskb->data,
16);
frame_head[1] &=
~0x80;
frame_buf_ttl = 3;
}
#ifdef RX_CHECKSUM_TEST
esp_rx_checksum_test(rskb);
#endif
local_bh_disable();
ieee80211_rx(sip->epub->hw,
rskb);
local_bh_enable();
} else {
kfree_skb(rskb);
}
} else {
if (ampdu_len->substate ==
RX_ABORT) {
u8 *a;
have_rxabort = true;
esp_sip_dbg(ESP_DBG_TRACE,
"rx abort %d %d\n",
frame_buf_ttl,
pkt_num);
if (frame_buf_ttl
&& !sip->
rxabort_fixed) {
struct
esp_rx_ampdu_len
*next_good_ampdu_len
=
ampdu_len + 1;
a = frame_head;
esp_sip_dbg
(ESP_DBG_TRACE,
"frame:%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
a[0], a[1],
a[2], a[3],
a[4], a[5],
a[6], a[7],
a[8], a[9],
a[10], a[11],
a[12], a[13],
a[14], a[15]);
while
(!sip_ampdu_occupy_buf
(sip,
next_good_ampdu_len))
{
if (next_good_ampdu_len > ampdu_len + pkt_num - 1)
break;
next_good_ampdu_len++;
}
if (next_good_ampdu_len <= ampdu_len + pkt_num - 1) {
bool b0,
b10,
b11;
a = skb->
data;
esp_sip_dbg
(ESP_DBG_TRACE,
"buf:%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
a[0],
a[1],
a[2],
a[3],
a[4],
a[5],
a[6],
a[7],
a[8],
a[9],
a[10],
a[11],
a[12],
a[13],
a[14],
a
[15]);
b0 = memcmp
(frame_head
+ 4,
skb->
data +
4,
12) ==
0;
b10 =
memcmp
(frame_head
+ 10,
skb->
data,
6) ==
0;
b11 =
memcpy
(frame_head
+ 11,
skb->
data,
5) ==
0;
esp_sip_dbg
(ESP_DBG_TRACE,
"com %d %d %d\n",
b0,
b10,
b11);
if (b0
&& !b10
&&
!b11) {
have_rxabort
=
false;
esp_sip_dbg
(ESP_DBG_TRACE,
"repair 0\n");
} else
if (!b0
&&
b10
&&
!b11)
{
skb_push
(skb,
10);
memcpy
(skb->
data,
frame_head,
10);
have_rxabort
=
false;
pulled_len
-=
10;
esp_sip_dbg
(ESP_DBG_TRACE,
"repair 10\n");
} else
if (!b0
&&
!b10
&&
b11)
{
skb_push
(skb,
11);
memcpy
(skb->
data,
frame_head,
11);
have_rxabort
=
false;
pulled_len
-=
11;
esp_sip_dbg
(ESP_DBG_TRACE,
"repair 11\n");
}
}
}
}
pkt_dropped++;
esp_sip_dbg(ESP_DBG_LOG,
"%s ampdu dropped %d/%d\n",
__func__, pkt_dropped,
pkt_total);
}
pkt_num--;
ampdu_len++;
}
if (frame_buf_ttl)
frame_buf_ttl--;
skb_pull(skb, hdr->len - pulled_len);
} else {
esp_sip_dbg(ESP_DBG_ERROR, "%s %d unknown type\n",
__func__, __LINE__);
}
_move_on:
if (hdr->len < remains_len) {
remains_len -= hdr->len;
} else {
break;
}
bufptr += hdr->len;
}
_exit:
#ifdef ESP_PREALLOC
esp_put_sip_skb(&skb);
#else
kfree_skb(skb);
#endif
return trigger_rxq;
#undef DO_NOT_COPY
#undef DO_COPY
}
static void _sip_rxq_process(struct esp_sip *sip)
{
struct sk_buff *skb = NULL;
bool sendup = false;
while ((skb = skb_dequeue(&sip->rxq))) {
if (sip_rx_pkt_process(sip, skb))
sendup = true;
}
if (sendup) {
queue_work(sip->epub->esp_wkq, &sip->epub->sendup_work);
}
/* probably tx_credit is updated, try txq */
sip_trigger_txq_process(sip);
}
void sip_rxq_process(struct work_struct *work)
{
struct esp_sip *sip =
container_of(work, struct esp_sip, rx_process_work);
if (sip == NULL) {
ESSERT(0);
return;
}
if (unlikely(atomic_read(&sip->state) == SIP_SEND_INIT)) {
sip_send_chip_init(sip);
atomic_set(&sip->state, SIP_WAIT_BOOTUP);
return;
}
mutex_lock(&sip->rx_mtx);
_sip_rxq_process(sip);
mutex_unlock(&sip->rx_mtx);
}
static inline void sip_rx_pkt_enqueue(struct esp_sip *sip,
struct sk_buff *skb)
{
skb_queue_tail(&sip->rxq, skb);
}
static inline struct sk_buff *sip_rx_pkt_dequeue(struct esp_sip *sip)
{
return skb_dequeue(&sip->rxq);
}
static u32 sip_rx_count = 0;
void sip_debug_show(struct esp_sip *sip)
{
esp_sip_dbg(ESP_DBG_ERROR, "txq left %d %d\n",
skb_queue_len(&sip->epub->txq),
atomic_read(&sip->tx_data_pkt_queued));
esp_sip_dbg(ESP_DBG_ERROR, "tx queues stop ? %d\n",
atomic_read(&sip->epub->txq_stopped));
esp_sip_dbg(ESP_DBG_ERROR, "txq stop? %d\n",
test_bit(ESP_WL_FLAG_STOP_TXQ, &sip->epub->wl.flags));
esp_sip_dbg(ESP_DBG_ERROR, "tx credit %d\n",
atomic_read(&sip->tx_credits));
esp_sip_dbg(ESP_DBG_ERROR, "rx collect %d\n", sip_rx_count);
sip_rx_count = 0;
}
int sip_rx(struct esp_pub *epub)
{
struct sip_hdr *shdr = NULL;
struct esp_sip *sip = epub->sip;
int err = 0;
struct sk_buff *first_skb = NULL;
u8 *rx_buf = NULL;
u32 rx_blksz;
struct sk_buff *rx_skb = NULL;
u32 first_sz;
first_sz = sif_get_regs(epub)->config_w0;
if (likely(sif_get_ate_config() != 1)) {
do {
u8 raw_seq = sif_get_regs(epub)->intr_raw & 0xff;
if (raw_seq != sip->to_host_seq) {
if (raw_seq == sip->to_host_seq + 1) { /* when last read pkt crc err, this situation may occur, but raw_seq mustn't < to_host_Seq */
sip->to_host_seq = raw_seq;
esp_dbg(ESP_DBG_TRACE,
"warn: to_host_seq reg 0x%02x, seq 0x%02x",
raw_seq, sip->to_host_seq);
break;
}
esp_dbg(ESP_DBG_ERROR,
"err: to_host_seq reg 0x%02x, seq 0x%02x",
raw_seq, sip->to_host_seq);
goto _err;
}
} while (0);
}
esp_sip_dbg(ESP_DBG_LOG, "%s enter\n", __func__);
/* first read one block out, if we luck enough, that's it
*
* To make design as simple as possible, we allocate skb(s)
* separately for each sif read operation to avoid global
* read_buf_pointe access. It coule be optimized late.
*/
rx_blksz = sif_get_blksz(epub);
#ifdef ESP_PREALLOC
first_skb = esp_get_sip_skb(roundup(first_sz, rx_blksz));
#else
first_skb =
__dev_alloc_skb(roundup(first_sz, rx_blksz), GFP_KERNEL);
#endif /* ESP_PREALLOC */
if (first_skb == NULL) {
sif_unlock_bus(epub);
esp_sip_dbg(ESP_DBG_ERROR, "%s first no memory \n",
__func__);
goto _err;
}
rx_buf = skb_put(first_skb, first_sz);
esp_sip_dbg(ESP_DBG_LOG, "%s rx_buf ptr %p, first_sz %d\n",
__func__, rx_buf, first_sz);
#ifdef USE_EXT_GPIO
do {
int err2 = 0;
u16 value = 0;
u16 intr_mask = ext_gpio_get_int_mask_reg();
if (!intr_mask)
break;
value = sif_get_regs(epub)->config_w3 & intr_mask;
if (value) {
err2 = sif_interrupt_target(epub, 6);
esp_sip_dbg(ESP_DBG, "write gpio\n");
}
if (!err2 && value) {
esp_sip_dbg(ESP_DBG_TRACE,
"%s intr_mask[0x%04x] value[0x%04x]\n",
__func__, intr_mask, value);
ext_gpio_int_process(value);
}
} while (0);
#endif
err =
esp_common_read(epub, rx_buf, first_sz, ESP_SIF_NOSYNC, false);
sip_rx_count++;
if (unlikely(err)) {
esp_dbg(ESP_DBG_ERROR, " %s first read err %d %d\n",
__func__, err, sif_get_regs(epub)->config_w0);
#ifdef ESP_PREALLOC
esp_put_sip_skb(&first_skb);
#else
kfree_skb(first_skb);
#endif /* ESP_PREALLOC */
sif_unlock_bus(epub);
goto _err;
}
shdr = (struct sip_hdr *) rx_buf;
if (SIP_HDR_IS_CTRL(shdr) && (shdr->c_evtid == SIP_EVT_SLEEP)) {
atomic_set(&sip->epub->ps.state, ESP_PM_ON);
esp_dbg(ESP_DBG_TRACE, "s\n");
}
if (likely(sif_get_ate_config() != 1)) {
sip->to_host_seq++;
}
if ((shdr->len & 3) != 0) {
esp_sip_dbg(ESP_DBG_ERROR, "%s shdr->len[%d] error\n",
__func__, shdr->len);
#ifdef ESP_PREALLOC
esp_put_sip_skb(&first_skb);
#else
kfree_skb(first_skb);
#endif /* ESP_PREALLOC */
sif_unlock_bus(epub);
err = -EIO;
goto _err;
}
if (shdr->len != first_sz) {
esp_sip_dbg(ESP_DBG_ERROR,
"%s shdr->len[%d] first_size[%d] error\n",
__func__, shdr->len, first_sz);
#ifdef ESP_PREALLOC
esp_put_sip_skb(&first_skb);
#else
kfree_skb(first_skb);
#endif /* ESP_PREALLOC */
sif_unlock_bus(epub);
err = -EIO;
goto _err;
} else {
sif_unlock_bus(epub);
skb_trim(first_skb, shdr->len);
esp_dbg(ESP_DBG_TRACE, " %s first_skb only\n", __func__);
rx_skb = first_skb;
}
if (atomic_read(&sip->state) == SIP_STOP) {
#ifdef ESP_PREALLOC
esp_put_sip_skb(&rx_skb);
#else
kfree_skb(rx_skb);
#endif /* ESP_PREALLOC */
esp_sip_dbg(ESP_DBG_ERROR, "%s when sip stopped\n",
__func__);
return 0;
}
sip_rx_pkt_enqueue(sip, rx_skb);
queue_work(sip->epub->esp_wkq, &sip->rx_process_work);
_err:
return err;
}
int sip_post_init(struct esp_sip *sip, struct sip_evt_bootup2 *bevt)
{
struct esp_pub *epub;