mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 10:26:42 +07:00
caif-hsi: Making read and writes asynchronous.
Some platforms do not allow to put HSI block into low-power mode when FIFO is not empty. The patch flushes (by reading) FIFO at wake down sequence. Asynchronous read and write is implemented for that. As a side effect this will also greatly improve performance. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Martensson
David S. Miller
parent
73033c987a
commit
687b13e98a
@ -145,7 +145,7 @@ static int cfhsi_flush_fifo(struct cfhsi *cfhsi)
|
||||
}
|
||||
|
||||
ret = 5 * HZ;
|
||||
wait_event_interruptible_timeout(cfhsi->flush_fifo_wait,
|
||||
ret = wait_event_interruptible_timeout(cfhsi->flush_fifo_wait,
|
||||
!test_bit(CFHSI_FLUSH_FIFO, &cfhsi->bits), ret);
|
||||
|
||||
if (ret < 0) {
|
||||
@ -272,16 +272,13 @@ static int cfhsi_tx_frm(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
return CFHSI_DESC_SZ + pld_len;
|
||||
}
|
||||
|
||||
static void cfhsi_tx_done_work(struct work_struct *work)
|
||||
static void cfhsi_tx_done(struct cfhsi *cfhsi)
|
||||
{
|
||||
struct cfhsi *cfhsi = NULL;
|
||||
struct cfhsi_desc *desc = NULL;
|
||||
int len = 0;
|
||||
int res;
|
||||
|
||||
cfhsi = container_of(work, struct cfhsi, tx_done_work);
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s.\n",
|
||||
__func__);
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s.\n", __func__);
|
||||
|
||||
if (test_bit(CFHSI_SHUTDOWN, &cfhsi->bits))
|
||||
return;
|
||||
@ -343,11 +340,11 @@ static void cfhsi_tx_done_cb(struct cfhsi_drv *drv)
|
||||
|
||||
if (test_bit(CFHSI_SHUTDOWN, &cfhsi->bits))
|
||||
return;
|
||||
|
||||
queue_work(cfhsi->wq, &cfhsi->tx_done_work);
|
||||
cfhsi_tx_done(cfhsi);
|
||||
}
|
||||
|
||||
static int cfhsi_rx_desc(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
static int cfhsi_rx_desc(struct cfhsi_desc *desc, struct cfhsi *cfhsi,
|
||||
bool *dump)
|
||||
{
|
||||
int xfer_sz = 0;
|
||||
int nfrms = 0;
|
||||
@ -358,6 +355,7 @@ static int cfhsi_rx_desc(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
(desc->offset > CFHSI_MAX_EMB_FRM_SZ)) {
|
||||
dev_err(&cfhsi->ndev->dev, "%s: Invalid descriptor.\n",
|
||||
__func__);
|
||||
*dump = true;
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -365,7 +363,7 @@ static int cfhsi_rx_desc(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
if (desc->offset) {
|
||||
struct sk_buff *skb;
|
||||
u8 *dst = NULL;
|
||||
int len = 0, retries = 0;
|
||||
int len = 0;
|
||||
pfrm = ((u8 *)desc) + desc->offset;
|
||||
|
||||
/* Remove offset padding. */
|
||||
@ -378,24 +376,11 @@ static int cfhsi_rx_desc(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
|
||||
|
||||
/* Allocate SKB (OK even in IRQ context). */
|
||||
skb = alloc_skb(len + 1, GFP_KERNEL);
|
||||
while (!skb) {
|
||||
retries++;
|
||||
schedule_timeout(1);
|
||||
skb = alloc_skb(len + 1, GFP_KERNEL);
|
||||
if (skb) {
|
||||
printk(KERN_WARNING "%s: slept for %u "
|
||||
"before getting memory\n",
|
||||
__func__, retries);
|
||||
break;
|
||||
}
|
||||
if (retries > HZ) {
|
||||
printk(KERN_ERR "%s: slept for 1HZ and "
|
||||
"did not get memory\n",
|
||||
__func__);
|
||||
cfhsi->ndev->stats.rx_dropped++;
|
||||
goto drop_frame;
|
||||
}
|
||||
skb = alloc_skb(len + 1, GFP_ATOMIC);
|
||||
if (!skb) {
|
||||
dev_err(&cfhsi->ndev->dev, "%s: Out of memory !\n",
|
||||
__func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
caif_assert(skb != NULL);
|
||||
|
||||
@ -421,7 +406,6 @@ static int cfhsi_rx_desc(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
cfhsi->ndev->stats.rx_bytes += len;
|
||||
}
|
||||
|
||||
drop_frame:
|
||||
/* Calculate transfer length. */
|
||||
plen = desc->cffrm_len;
|
||||
while (nfrms < CFHSI_MAX_PKTS && *plen) {
|
||||
@ -439,12 +423,13 @@ static int cfhsi_rx_desc(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
"%s: Invalid payload len: %d, ignored.\n",
|
||||
__func__, xfer_sz);
|
||||
xfer_sz = 0;
|
||||
*dump = true;
|
||||
}
|
||||
|
||||
return xfer_sz;
|
||||
}
|
||||
|
||||
static int cfhsi_rx_pld(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
static int cfhsi_rx_pld(struct cfhsi_desc *desc, struct cfhsi *cfhsi,
|
||||
bool *dump)
|
||||
{
|
||||
int rx_sz = 0;
|
||||
int nfrms = 0;
|
||||
@ -456,21 +441,33 @@ static int cfhsi_rx_pld(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
(desc->offset > CFHSI_MAX_EMB_FRM_SZ))) {
|
||||
dev_err(&cfhsi->ndev->dev, "%s: Invalid descriptor.\n",
|
||||
__func__);
|
||||
*dump = true;
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Set frame pointer to start of payload. */
|
||||
pfrm = desc->emb_frm + CFHSI_MAX_EMB_FRM_SZ;
|
||||
plen = desc->cffrm_len;
|
||||
|
||||
/* Skip already processed frames. */
|
||||
while (nfrms < cfhsi->rx_state.nfrms) {
|
||||
pfrm += *plen;
|
||||
rx_sz += *plen;
|
||||
plen++;
|
||||
nfrms++;
|
||||
}
|
||||
|
||||
/* Parse payload. */
|
||||
while (nfrms < CFHSI_MAX_PKTS && *plen) {
|
||||
struct sk_buff *skb;
|
||||
u8 *dst = NULL;
|
||||
u8 *pcffrm = NULL;
|
||||
int len = 0, retries = 0;
|
||||
int len = 0;
|
||||
|
||||
if (WARN_ON(desc->cffrm_len[nfrms] > CFHSI_MAX_PAYLOAD_SZ)) {
|
||||
dev_err(&cfhsi->ndev->dev, "%s: Invalid payload.\n",
|
||||
__func__);
|
||||
*dump = true;
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
@ -483,24 +480,12 @@ static int cfhsi_rx_pld(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
len += 2; /* Add FCS fields. */
|
||||
|
||||
/* Allocate SKB (OK even in IRQ context). */
|
||||
skb = alloc_skb(len + 1, GFP_KERNEL);
|
||||
while (!skb) {
|
||||
retries++;
|
||||
schedule_timeout(1);
|
||||
skb = alloc_skb(len + 1, GFP_KERNEL);
|
||||
if (skb) {
|
||||
printk(KERN_WARNING "%s: slept for %u "
|
||||
"before getting memory\n",
|
||||
__func__, retries);
|
||||
break;
|
||||
}
|
||||
if (retries > HZ) {
|
||||
printk(KERN_ERR "%s: slept for 1HZ "
|
||||
"and did not get memory\n",
|
||||
__func__);
|
||||
cfhsi->ndev->stats.rx_dropped++;
|
||||
goto drop_frame;
|
||||
}
|
||||
skb = alloc_skb(len + 1, GFP_ATOMIC);
|
||||
if (!skb) {
|
||||
dev_err(&cfhsi->ndev->dev, "%s: Out of memory !\n",
|
||||
__func__);
|
||||
cfhsi->rx_state.nfrms = nfrms;
|
||||
return -ENOMEM;
|
||||
}
|
||||
caif_assert(skb != NULL);
|
||||
|
||||
@ -524,7 +509,6 @@ static int cfhsi_rx_pld(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
cfhsi->ndev->stats.rx_packets++;
|
||||
cfhsi->ndev->stats.rx_bytes += len;
|
||||
|
||||
drop_frame:
|
||||
pfrm += *plen;
|
||||
rx_sz += *plen;
|
||||
plen++;
|
||||
@ -534,18 +518,16 @@ static int cfhsi_rx_pld(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
|
||||
return rx_sz;
|
||||
}
|
||||
|
||||
static void cfhsi_rx_done_work(struct work_struct *work)
|
||||
static void cfhsi_rx_done(struct cfhsi *cfhsi)
|
||||
{
|
||||
int res;
|
||||
int desc_pld_len = 0;
|
||||
struct cfhsi *cfhsi = NULL;
|
||||
struct cfhsi_desc *desc = NULL;
|
||||
bool dump = false;
|
||||
|
||||
cfhsi = container_of(work, struct cfhsi, rx_done_work);
|
||||
desc = (struct cfhsi_desc *)cfhsi->rx_buf;
|
||||
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s: Kick timer if pending.\n",
|
||||
__func__);
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s\n", __func__);
|
||||
|
||||
if (test_bit(CFHSI_SHUTDOWN, &cfhsi->bits))
|
||||
return;
|
||||
@ -555,21 +537,33 @@ static void cfhsi_rx_done_work(struct work_struct *work)
|
||||
mod_timer_pending(&cfhsi->timer, jiffies + CFHSI_INACTIVITY_TOUT);
|
||||
spin_unlock_bh(&cfhsi->lock);
|
||||
|
||||
if (cfhsi->rx_state == CFHSI_RX_STATE_DESC) {
|
||||
desc_pld_len = cfhsi_rx_desc(desc, cfhsi);
|
||||
if (cfhsi->rx_state.state == CFHSI_RX_STATE_DESC) {
|
||||
desc_pld_len = cfhsi_rx_desc(desc, cfhsi, &dump);
|
||||
if (desc_pld_len == -ENOMEM)
|
||||
goto restart;
|
||||
} else {
|
||||
int pld_len;
|
||||
|
||||
pld_len = cfhsi_rx_pld(desc, cfhsi);
|
||||
if (!cfhsi->rx_state.piggy_desc) {
|
||||
pld_len = cfhsi_rx_pld(desc, cfhsi, &dump);
|
||||
if (pld_len == -ENOMEM)
|
||||
goto restart;
|
||||
cfhsi->rx_state.pld_len = pld_len;
|
||||
} else {
|
||||
pld_len = cfhsi->rx_state.pld_len;
|
||||
}
|
||||
|
||||
if ((pld_len > 0) && (desc->header & CFHSI_PIGGY_DESC)) {
|
||||
struct cfhsi_desc *piggy_desc;
|
||||
piggy_desc = (struct cfhsi_desc *)
|
||||
(desc->emb_frm + CFHSI_MAX_EMB_FRM_SZ +
|
||||
pld_len);
|
||||
cfhsi->rx_state.piggy_desc = true;
|
||||
|
||||
/* Extract piggy-backed descriptor. */
|
||||
desc_pld_len = cfhsi_rx_desc(piggy_desc, cfhsi);
|
||||
desc_pld_len = cfhsi_rx_desc(piggy_desc, cfhsi, &dump);
|
||||
if (desc_pld_len == -ENOMEM)
|
||||
goto restart;
|
||||
|
||||
/*
|
||||
* Copy needed information from the piggy-backed
|
||||
@ -580,16 +574,24 @@ static void cfhsi_rx_done_work(struct work_struct *work)
|
||||
}
|
||||
}
|
||||
|
||||
if (unlikely(dump)) {
|
||||
size_t rx_offset = cfhsi->rx_ptr - cfhsi->rx_buf;
|
||||
dev_err(&cfhsi->ndev->dev, "%s: RX offset: %u.\n",
|
||||
__func__, (unsigned) rx_offset);
|
||||
print_hex_dump_bytes("--> ", DUMP_PREFIX_NONE,
|
||||
cfhsi->rx_buf, cfhsi->rx_len + rx_offset);
|
||||
}
|
||||
|
||||
memset(&cfhsi->rx_state, 0, sizeof(cfhsi->rx_state));
|
||||
if (desc_pld_len) {
|
||||
cfhsi->rx_state = CFHSI_RX_STATE_PAYLOAD;
|
||||
cfhsi->rx_state.state = CFHSI_RX_STATE_PAYLOAD;
|
||||
cfhsi->rx_ptr = cfhsi->rx_buf + CFHSI_DESC_SZ;
|
||||
cfhsi->rx_len = desc_pld_len;
|
||||
} else {
|
||||
cfhsi->rx_state = CFHSI_RX_STATE_DESC;
|
||||
cfhsi->rx_state.state = CFHSI_RX_STATE_DESC;
|
||||
cfhsi->rx_ptr = cfhsi->rx_buf;
|
||||
cfhsi->rx_len = CFHSI_DESC_SZ;
|
||||
}
|
||||
clear_bit(CFHSI_PENDING_RX, &cfhsi->bits);
|
||||
|
||||
if (test_bit(CFHSI_AWAKE, &cfhsi->bits)) {
|
||||
/* Set up new transfer. */
|
||||
@ -604,6 +606,26 @@ static void cfhsi_rx_done_work(struct work_struct *work)
|
||||
cfhsi->ndev->stats.rx_dropped++;
|
||||
}
|
||||
}
|
||||
return;
|
||||
|
||||
restart:
|
||||
if (++cfhsi->rx_state.retries > CFHSI_MAX_RX_RETRIES) {
|
||||
dev_err(&cfhsi->ndev->dev, "%s: No memory available "
|
||||
"in %d iterations.\n",
|
||||
__func__, CFHSI_MAX_RX_RETRIES);
|
||||
BUG();
|
||||
}
|
||||
mod_timer(&cfhsi->rx_slowpath_timer, jiffies + 1);
|
||||
}
|
||||
|
||||
static void cfhsi_rx_slowpath(unsigned long arg)
|
||||
{
|
||||
struct cfhsi *cfhsi = (struct cfhsi *)arg;
|
||||
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s.\n",
|
||||
__func__);
|
||||
|
||||
cfhsi_rx_done(cfhsi);
|
||||
}
|
||||
|
||||
static void cfhsi_rx_done_cb(struct cfhsi_drv *drv)
|
||||
@ -617,12 +639,10 @@ static void cfhsi_rx_done_cb(struct cfhsi_drv *drv)
|
||||
if (test_bit(CFHSI_SHUTDOWN, &cfhsi->bits))
|
||||
return;
|
||||
|
||||
set_bit(CFHSI_PENDING_RX, &cfhsi->bits);
|
||||
|
||||
if (test_and_clear_bit(CFHSI_FLUSH_FIFO, &cfhsi->bits))
|
||||
wake_up_interruptible(&cfhsi->flush_fifo_wait);
|
||||
else
|
||||
queue_work(cfhsi->wq, &cfhsi->rx_done_work);
|
||||
cfhsi_rx_done(cfhsi);
|
||||
}
|
||||
|
||||
static void cfhsi_wake_up(struct work_struct *work)
|
||||
@ -651,9 +671,9 @@ static void cfhsi_wake_up(struct work_struct *work)
|
||||
__func__);
|
||||
|
||||
/* Wait for acknowledge. */
|
||||
ret = CFHSI_WAKEUP_TOUT;
|
||||
wait_event_interruptible_timeout(cfhsi->wake_up_wait,
|
||||
test_bit(CFHSI_WAKE_UP_ACK,
|
||||
ret = CFHSI_WAKE_TOUT;
|
||||
ret = wait_event_interruptible_timeout(cfhsi->wake_up_wait,
|
||||
test_and_clear_bit(CFHSI_WAKE_UP_ACK,
|
||||
&cfhsi->bits), ret);
|
||||
if (unlikely(ret < 0)) {
|
||||
/* Interrupted by signal. */
|
||||
@ -678,16 +698,11 @@ static void cfhsi_wake_up(struct work_struct *work)
|
||||
clear_bit(CFHSI_WAKE_UP, &cfhsi->bits);
|
||||
|
||||
/* Resume read operation. */
|
||||
if (!test_bit(CFHSI_PENDING_RX, &cfhsi->bits)) {
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s: Start RX.\n",
|
||||
__func__);
|
||||
res = cfhsi->dev->cfhsi_rx(cfhsi->rx_ptr,
|
||||
cfhsi->rx_len, cfhsi->dev);
|
||||
if (WARN_ON(res < 0)) {
|
||||
dev_err(&cfhsi->ndev->dev, "%s: RX error %d.\n",
|
||||
__func__, res);
|
||||
}
|
||||
}
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s: Start RX.\n", __func__);
|
||||
res = cfhsi->dev->cfhsi_rx(cfhsi->rx_ptr, cfhsi->rx_len, cfhsi->dev);
|
||||
|
||||
if (WARN_ON(res < 0))
|
||||
dev_err(&cfhsi->ndev->dev, "%s: RX err %d.\n", __func__, res);
|
||||
|
||||
/* Clear power up acknowledment. */
|
||||
clear_bit(CFHSI_WAKE_UP_ACK, &cfhsi->bits);
|
||||
@ -726,50 +741,29 @@ static void cfhsi_wake_up(struct work_struct *work)
|
||||
"%s: Failed to create HSI frame: %d.\n",
|
||||
__func__, len);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
static void cfhsi_wake_down(struct work_struct *work)
|
||||
{
|
||||
long ret;
|
||||
struct cfhsi *cfhsi = NULL;
|
||||
size_t fifo_occupancy;
|
||||
size_t fifo_occupancy = 0;
|
||||
int retry = CFHSI_WAKE_TOUT;
|
||||
|
||||
cfhsi = container_of(work, struct cfhsi, wake_down_work);
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s.\n",
|
||||
__func__);
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s.\n", __func__);
|
||||
|
||||
if (test_bit(CFHSI_SHUTDOWN, &cfhsi->bits))
|
||||
return;
|
||||
|
||||
/* Check if there is something in FIFO. */
|
||||
if (WARN_ON(cfhsi->dev->cfhsi_fifo_occupancy(cfhsi->dev,
|
||||
&fifo_occupancy)))
|
||||
fifo_occupancy = 0;
|
||||
|
||||
if (fifo_occupancy) {
|
||||
dev_dbg(&cfhsi->ndev->dev,
|
||||
"%s: %u words in RX FIFO, restart timer.\n",
|
||||
__func__, (unsigned) fifo_occupancy);
|
||||
spin_lock_bh(&cfhsi->lock);
|
||||
mod_timer(&cfhsi->timer,
|
||||
jiffies + CFHSI_INACTIVITY_TOUT);
|
||||
spin_unlock_bh(&cfhsi->lock);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Cancel pending RX requests */
|
||||
cfhsi->dev->cfhsi_rx_cancel(cfhsi->dev);
|
||||
|
||||
/* Deactivate wake line. */
|
||||
cfhsi->dev->cfhsi_wake_down(cfhsi->dev);
|
||||
|
||||
/* Wait for acknowledge. */
|
||||
ret = CFHSI_WAKEUP_TOUT;
|
||||
ret = CFHSI_WAKE_TOUT;
|
||||
ret = wait_event_interruptible_timeout(cfhsi->wake_down_wait,
|
||||
test_bit(CFHSI_WAKE_DOWN_ACK,
|
||||
&cfhsi->bits),
|
||||
ret);
|
||||
test_and_clear_bit(CFHSI_WAKE_DOWN_ACK,
|
||||
&cfhsi->bits), ret);
|
||||
if (ret < 0) {
|
||||
/* Interrupted by signal. */
|
||||
dev_info(&cfhsi->ndev->dev, "%s: Signalled: %ld.\n",
|
||||
@ -777,28 +771,31 @@ static void cfhsi_wake_down(struct work_struct *work)
|
||||
return;
|
||||
} else if (!ret) {
|
||||
/* Timeout */
|
||||
dev_err(&cfhsi->ndev->dev, "%s: Timeout.\n",
|
||||
__func__);
|
||||
dev_err(&cfhsi->ndev->dev, "%s: Timeout.\n", __func__);
|
||||
}
|
||||
|
||||
/* Clear power down acknowledment. */
|
||||
clear_bit(CFHSI_WAKE_DOWN_ACK, &cfhsi->bits);
|
||||
/* Check FIFO occupancy. */
|
||||
while (retry) {
|
||||
WARN_ON(cfhsi->dev->cfhsi_fifo_occupancy(cfhsi->dev,
|
||||
&fifo_occupancy));
|
||||
|
||||
if (!fifo_occupancy)
|
||||
break;
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
schedule_timeout(1);
|
||||
retry--;
|
||||
}
|
||||
|
||||
if (!retry)
|
||||
dev_err(&cfhsi->ndev->dev, "%s: FIFO Timeout.\n", __func__);
|
||||
|
||||
/* Clear AWAKE condition. */
|
||||
clear_bit(CFHSI_AWAKE, &cfhsi->bits);
|
||||
|
||||
/* Check if there is something in FIFO. */
|
||||
if (WARN_ON(cfhsi->dev->cfhsi_fifo_occupancy(cfhsi->dev,
|
||||
&fifo_occupancy)))
|
||||
fifo_occupancy = 0;
|
||||
/* Cancel pending RX requests. */
|
||||
cfhsi->dev->cfhsi_rx_cancel(cfhsi->dev);
|
||||
|
||||
if (fifo_occupancy) {
|
||||
dev_dbg(&cfhsi->ndev->dev,
|
||||
"%s: %u words in RX FIFO, wakeup forced.\n",
|
||||
__func__, (unsigned) fifo_occupancy);
|
||||
if (!test_and_set_bit(CFHSI_WAKE_UP, &cfhsi->bits))
|
||||
queue_work(cfhsi->wq, &cfhsi->wake_up_work);
|
||||
} else
|
||||
dev_dbg(&cfhsi->ndev->dev, "%s: Done.\n",
|
||||
__func__);
|
||||
}
|
||||
|
||||
static void cfhsi_wake_up_cb(struct cfhsi_drv *drv)
|
||||
@ -874,11 +871,7 @@ static int cfhsi_xmit(struct sk_buff *skb, struct net_device *dev)
|
||||
}
|
||||
|
||||
/* Delete inactivity timer if started. */
|
||||
#ifdef CONFIG_SMP
|
||||
timer_active = del_timer_sync(&cfhsi->timer);
|
||||
#else
|
||||
timer_active = del_timer(&cfhsi->timer);
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
spin_unlock_bh(&cfhsi->lock);
|
||||
|
||||
@ -962,7 +955,7 @@ int cfhsi_probe(struct platform_device *pdev)
|
||||
|
||||
/* Initialize state vaiables. */
|
||||
cfhsi->tx_state = CFHSI_TX_STATE_IDLE;
|
||||
cfhsi->rx_state = CFHSI_RX_STATE_DESC;
|
||||
cfhsi->rx_state.state = CFHSI_RX_STATE_DESC;
|
||||
|
||||
/* Set flow info */
|
||||
cfhsi->flow_off_sent = 0;
|
||||
@ -1012,15 +1005,12 @@ int cfhsi_probe(struct platform_device *pdev)
|
||||
/* Initialize the work queues. */
|
||||
INIT_WORK(&cfhsi->wake_up_work, cfhsi_wake_up);
|
||||
INIT_WORK(&cfhsi->wake_down_work, cfhsi_wake_down);
|
||||
INIT_WORK(&cfhsi->rx_done_work, cfhsi_rx_done_work);
|
||||
INIT_WORK(&cfhsi->tx_done_work, cfhsi_tx_done_work);
|
||||
|
||||
/* Clear all bit fields. */
|
||||
clear_bit(CFHSI_WAKE_UP_ACK, &cfhsi->bits);
|
||||
clear_bit(CFHSI_WAKE_DOWN_ACK, &cfhsi->bits);
|
||||
clear_bit(CFHSI_WAKE_UP, &cfhsi->bits);
|
||||
clear_bit(CFHSI_AWAKE, &cfhsi->bits);
|
||||
clear_bit(CFHSI_PENDING_RX, &cfhsi->bits);
|
||||
|
||||
/* Create work thread. */
|
||||
cfhsi->wq = create_singlethread_workqueue(pdev->name);
|
||||
@ -1040,6 +1030,10 @@ int cfhsi_probe(struct platform_device *pdev)
|
||||
init_timer(&cfhsi->timer);
|
||||
cfhsi->timer.data = (unsigned long)cfhsi;
|
||||
cfhsi->timer.function = cfhsi_inactivity_tout;
|
||||
/* Setup the slowpath RX timer. */
|
||||
init_timer(&cfhsi->rx_slowpath_timer);
|
||||
cfhsi->rx_slowpath_timer.data = (unsigned long)cfhsi;
|
||||
cfhsi->rx_slowpath_timer.function = cfhsi_rx_slowpath;
|
||||
|
||||
/* Add CAIF HSI device to list. */
|
||||
spin_lock(&cfhsi_list_lock);
|
||||
@ -1110,12 +1104,9 @@ static void cfhsi_shutdown(struct cfhsi *cfhsi, bool remove_platform_dev)
|
||||
/* Flush workqueue */
|
||||
flush_workqueue(cfhsi->wq);
|
||||
|
||||
/* Delete timer if pending */
|
||||
#ifdef CONFIG_SMP
|
||||
/* Delete timers if pending */
|
||||
del_timer_sync(&cfhsi->timer);
|
||||
#else
|
||||
del_timer(&cfhsi->timer);
|
||||
#endif /* CONFIG_SMP */
|
||||
del_timer_sync(&cfhsi->rx_slowpath_timer);
|
||||
|
||||
/* Cancel pending RX request (if any) */
|
||||
cfhsi->dev->cfhsi_rx_cancel(cfhsi->dev);
|
||||
|
||||
@ -75,18 +75,21 @@ struct cfhsi_desc {
|
||||
#define CFHSI_WAKE_UP_ACK 1
|
||||
#define CFHSI_WAKE_DOWN_ACK 2
|
||||
#define CFHSI_AWAKE 3
|
||||
#define CFHSI_PENDING_RX 4
|
||||
#define CFHSI_SHUTDOWN 6
|
||||
#define CFHSI_FLUSH_FIFO 7
|
||||
#define CFHSI_WAKELOCK_HELD 4
|
||||
#define CFHSI_SHUTDOWN 5
|
||||
#define CFHSI_FLUSH_FIFO 6
|
||||
|
||||
#ifndef CFHSI_INACTIVITY_TOUT
|
||||
#define CFHSI_INACTIVITY_TOUT (1 * HZ)
|
||||
#endif /* CFHSI_INACTIVITY_TOUT */
|
||||
|
||||
#ifndef CFHSI_WAKEUP_TOUT
|
||||
#define CFHSI_WAKEUP_TOUT (3 * HZ)
|
||||
#endif /* CFHSI_WAKEUP_TOUT */
|
||||
#ifndef CFHSI_WAKE_TOUT
|
||||
#define CFHSI_WAKE_TOUT (3 * HZ)
|
||||
#endif /* CFHSI_WAKE_TOUT */
|
||||
|
||||
#ifndef CFHSI_MAX_RX_RETRIES
|
||||
#define CFHSI_MAX_RX_RETRIES (10 * HZ)
|
||||
#endif
|
||||
|
||||
/* Structure implemented by the CAIF HSI driver. */
|
||||
struct cfhsi_drv {
|
||||
@ -109,6 +112,15 @@ struct cfhsi_dev {
|
||||
struct cfhsi_drv *drv;
|
||||
};
|
||||
|
||||
/* Structure holds status of received CAIF frames processing */
|
||||
struct cfhsi_rx_state {
|
||||
int state;
|
||||
int nfrms;
|
||||
int pld_len;
|
||||
int retries;
|
||||
bool piggy_desc;
|
||||
};
|
||||
|
||||
/* Structure implemented by CAIF HSI drivers. */
|
||||
struct cfhsi {
|
||||
struct caif_dev_common cfdev;
|
||||
@ -118,7 +130,7 @@ struct cfhsi {
|
||||
struct cfhsi_drv drv;
|
||||
struct cfhsi_dev *dev;
|
||||
int tx_state;
|
||||
int rx_state;
|
||||
struct cfhsi_rx_state rx_state;
|
||||
int rx_len;
|
||||
u8 *rx_ptr;
|
||||
u8 *tx_buf;
|
||||
@ -130,13 +142,12 @@ struct cfhsi {
|
||||
struct list_head list;
|
||||
struct work_struct wake_up_work;
|
||||
struct work_struct wake_down_work;
|
||||
struct work_struct rx_done_work;
|
||||
struct work_struct tx_done_work;
|
||||
struct workqueue_struct *wq;
|
||||
wait_queue_head_t wake_up_wait;
|
||||
wait_queue_head_t wake_down_wait;
|
||||
wait_queue_head_t flush_fifo_wait;
|
||||
struct timer_list timer;
|
||||
struct timer_list rx_slowpath_timer;
|
||||
unsigned long bits;
|
||||
};
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user