mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
iwlagn: add IRQ tracing
The legacy IRQs could be read from a trace by their IO accesses, but reading the ICT doesn't leave any trace (pun intended ;-) ) so in order to see what input they get we need to add specific tracepoints. While at it, fix whitespace in two related places. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
This commit is contained in:
parent
27bf88829f
commit
b80667eee2
2 changed files with 50 additions and 11 deletions
|
@ -90,6 +90,35 @@ TRACE_EVENT(iwlwifi_dev_iowrite32,
|
|||
TP_printk("[%p] write io[%#x] = %#x)", __entry->priv, __entry->offs, __entry->val)
|
||||
);
|
||||
|
||||
TRACE_EVENT(iwlwifi_dev_irq,
|
||||
TP_PROTO(void *priv),
|
||||
TP_ARGS(priv),
|
||||
TP_STRUCT__entry(
|
||||
PRIV_ENTRY
|
||||
),
|
||||
TP_fast_assign(
|
||||
PRIV_ASSIGN;
|
||||
),
|
||||
/* TP_printk("") doesn't compile */
|
||||
TP_printk("%d", 0)
|
||||
);
|
||||
|
||||
TRACE_EVENT(iwlwifi_dev_ict_read,
|
||||
TP_PROTO(void *priv, u32 index, u32 value),
|
||||
TP_ARGS(priv, index, value),
|
||||
TP_STRUCT__entry(
|
||||
PRIV_ENTRY
|
||||
__field(u32, index)
|
||||
__field(u32, value)
|
||||
),
|
||||
TP_fast_assign(
|
||||
PRIV_ASSIGN;
|
||||
__entry->index = index;
|
||||
__entry->value = value;
|
||||
),
|
||||
TP_printk("read ict[%d] = %#.8x", __entry->index, __entry->value)
|
||||
);
|
||||
|
||||
#undef TRACE_SYSTEM
|
||||
#define TRACE_SYSTEM iwlwifi_ucode
|
||||
|
||||
|
|
|
@ -1281,6 +1281,8 @@ static irqreturn_t iwl_isr(int irq, void *data)
|
|||
if (!trans)
|
||||
return IRQ_NONE;
|
||||
|
||||
trace_iwlwifi_dev_irq(priv(trans));
|
||||
|
||||
trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
|
||||
|
||||
spin_lock_irqsave(&trans->shrd->lock, flags);
|
||||
|
@ -1355,6 +1357,7 @@ irqreturn_t iwl_isr_ict(int irq, void *data)
|
|||
struct iwl_trans_pcie *trans_pcie;
|
||||
u32 inta, inta_mask;
|
||||
u32 val = 0;
|
||||
u32 read;
|
||||
unsigned long flags;
|
||||
|
||||
if (!trans)
|
||||
|
@ -1368,6 +1371,8 @@ irqreturn_t iwl_isr_ict(int irq, void *data)
|
|||
if (!trans_pcie->use_ict)
|
||||
return iwl_isr(irq, data);
|
||||
|
||||
trace_iwlwifi_dev_irq(priv(trans));
|
||||
|
||||
spin_lock_irqsave(&trans->shrd->lock, flags);
|
||||
|
||||
/* Disable (but don't clear!) interrupts here to avoid
|
||||
|
@ -1382,24 +1387,29 @@ irqreturn_t iwl_isr_ict(int irq, void *data)
|
|||
/* Ignore interrupt if there's nothing in NIC to service.
|
||||
* This may be due to IRQ shared with another device,
|
||||
* or due to sporadic interrupts thrown from our NIC. */
|
||||
if (!trans_pcie->ict_tbl[trans_pcie->ict_index]) {
|
||||
read = le32_to_cpu(trans_pcie->ict_tbl[trans_pcie->ict_index]);
|
||||
trace_iwlwifi_dev_ict_read(priv(trans), trans_pcie->ict_index, read);
|
||||
if (!read) {
|
||||
IWL_DEBUG_ISR(trans, "Ignore interrupt, inta == 0\n");
|
||||
goto none;
|
||||
}
|
||||
|
||||
/* read all entries that not 0 start with ict_index */
|
||||
while (trans_pcie->ict_tbl[trans_pcie->ict_index]) {
|
||||
|
||||
val |= le32_to_cpu(trans_pcie->ict_tbl[trans_pcie->ict_index]);
|
||||
/*
|
||||
* Collect all entries up to the first 0, starting from ict_index;
|
||||
* note we already read at ict_index.
|
||||
*/
|
||||
do {
|
||||
val |= read;
|
||||
IWL_DEBUG_ISR(trans, "ICT index %d value 0x%08X\n",
|
||||
trans_pcie->ict_index,
|
||||
le32_to_cpu(
|
||||
trans_pcie->ict_tbl[trans_pcie->ict_index]));
|
||||
trans_pcie->ict_index, read);
|
||||
trans_pcie->ict_tbl[trans_pcie->ict_index] = 0;
|
||||
trans_pcie->ict_index =
|
||||
iwl_queue_inc_wrap(trans_pcie->ict_index, ICT_COUNT);
|
||||
|
||||
}
|
||||
read = le32_to_cpu(trans_pcie->ict_tbl[trans_pcie->ict_index]);
|
||||
trace_iwlwifi_dev_ict_read(priv(trans), trans_pcie->ict_index,
|
||||
read);
|
||||
} while (read);
|
||||
|
||||
/* We should not get this value, just ignore it. */
|
||||
if (val == 0xffffffff)
|
||||
|
@ -1426,7 +1436,7 @@ irqreturn_t iwl_isr_ict(int irq, void *data)
|
|||
if (likely(inta))
|
||||
tasklet_schedule(&trans_pcie->irq_tasklet);
|
||||
else if (test_bit(STATUS_INT_ENABLED, &trans->shrd->status) &&
|
||||
!trans_pcie->inta) {
|
||||
!trans_pcie->inta) {
|
||||
/* Allow interrupt if was disabled by this handler and
|
||||
* no tasklet was schedules, We should not enable interrupt,
|
||||
* tasklet will enable it.
|
||||
|
@ -1442,7 +1452,7 @@ irqreturn_t iwl_isr_ict(int irq, void *data)
|
|||
* only Re-enable if disabled by irq.
|
||||
*/
|
||||
if (test_bit(STATUS_INT_ENABLED, &trans->shrd->status) &&
|
||||
!trans_pcie->inta)
|
||||
!trans_pcie->inta)
|
||||
iwl_enable_interrupts(trans);
|
||||
|
||||
spin_unlock_irqrestore(&trans->shrd->lock, flags);
|
||||
|
|
Loading…
Reference in a new issue