RX_HTRSH interrupt is handled in exactly the same manner
as RX_DONE interrupt - fetching accumulated packets from RX
ring. In addition there's a rate limitted warning message.
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/wil6210/debug.c | 17 ++++++++++++++++
drivers/net/wireless/ath/wil6210/interrupt.c | 30 +++++++++++++++++++++++++---
drivers/net/wireless/ath/wil6210/wil6210.h | 3 +++
3 files changed, 47 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/ath/wil6210/debug.c b/drivers/net/wireless/ath/wil6210/debug.c
index 8d99021..3249562 100644
--- a/drivers/net/wireless/ath/wil6210/debug.c
+++ b/drivers/net/wireless/ath/wil6210/debug.c
@@ -32,6 +32,23 @@ void wil_err(struct wil6210_priv *wil, const char *fmt, ...)
va_end(args);
}
+void wil_err_ratelimited(struct wil6210_priv *wil, const char *fmt, ...)
+{
+ if (net_ratelimit()) {
+ struct net_device *ndev = wil_to_ndev(wil);
+ struct va_format vaf = {
+ .fmt = fmt,
+ };
+ va_list args;
+
+ va_start(args, fmt);
+ vaf.va = &args;
+ netdev_err(ndev, "%pV", &vaf);
+ trace_wil6210_log_err(&vaf);
+ va_end(args);
+ }
+}
+
void wil_info(struct wil6210_priv *wil, const char *fmt, ...)
{
struct net_device *ndev = wil_to_ndev(wil);
diff --git a/drivers/net/wireless/ath/wil6210/interrupt.c b/drivers/net/wireless/ath/wil6210/interrupt.c
index 90f416f..4bcbd62 100644
--- a/drivers/net/wireless/ath/wil6210/interrupt.c
+++ b/drivers/net/wireless/ath/wil6210/interrupt.c
@@ -36,7 +36,8 @@
*/
#define WIL6210_IRQ_DISABLE (0xFFFFFFFFUL)
-#define WIL6210_IMC_RX BIT_DMA_EP_RX_ICR_RX_DONE
+#define WIL6210_IMC_RX (BIT_DMA_EP_RX_ICR_RX_DONE | \
+ BIT_DMA_EP_RX_ICR_RX_HTRSH)
#define WIL6210_IMC_TX (BIT_DMA_EP_TX_ICR_TX_DONE | \
BIT_DMA_EP_TX_ICR_TX_DONE_N(0))
#define WIL6210_IMC_MISC (ISR_MISC_FW_READY | \
@@ -171,6 +172,7 @@ static irqreturn_t wil6210_irq_rx(int irq, void *cookie)
u32 isr = wil_ioread32_and_clear(wil->csr +
HOSTADDR(RGF_DMA_EP_RX_ICR) +
offsetof(struct RGF_ICR, ICR));
+ bool need_unmask = true;
trace_wil6210_irq_rx(isr);
wil_dbg_irq(wil, "ISR RX 0x%08x\n", isr);
@@ -182,12 +184,24 @@ static irqreturn_t wil6210_irq_rx(int irq, void *cookie)
wil6210_mask_irq_rx(wil);
- if (isr & BIT_DMA_EP_RX_ICR_RX_DONE) {
+ /* RX_DONE and RX_HTRSH interrupts are the same if interrupt
+ * moderation is not used. Interrupt moderation may cause RX
+ * buffer overflow while RX_DONE is delayed. The required
+ * action is always the same - should empty the accumulated
+ * packets from the RX ring.
+ */
+ if (isr & (BIT_DMA_EP_RX_ICR_RX_DONE | BIT_DMA_EP_RX_ICR_RX_HTRSH)) {
wil_dbg_irq(wil, "RX done\n");
- isr &= ~BIT_DMA_EP_RX_ICR_RX_DONE;
+
+ if (isr & BIT_DMA_EP_RX_ICR_RX_HTRSH)
+ wil_err_ratelimited(wil, "Received \"Rx buffer is in risk "
+ "of overflow\" interrupt\n");
+
+ isr &= ~(BIT_DMA_EP_RX_ICR_RX_DONE | BIT_DMA_EP_RX_ICR_RX_HTRSH);
if (test_bit(wil_status_reset_done, &wil->status)) {
if (test_bit(wil_status_napi_en, &wil->status)) {
wil_dbg_txrx(wil, "NAPI(Rx) schedule\n");
+ need_unmask = false;
napi_schedule(&wil->napi_rx);
} else {
wil_err(wil, "Got Rx interrupt while "
@@ -204,6 +218,10 @@ static irqreturn_t wil6210_irq_rx(int irq, void *cookie)
/* Rx IRQ will be enabled when NAPI processing finished */
atomic_inc(&wil->isr_count_rx);
+
+ if (unlikely(need_unmask))
+ wil6210_unmask_irq_rx(wil);
+
return IRQ_HANDLED;
}
@@ -213,6 +231,7 @@ static irqreturn_t wil6210_irq_tx(int irq, void *cookie)
u32 isr = wil_ioread32_and_clear(wil->csr +
HOSTADDR(RGF_DMA_EP_TX_ICR) +
offsetof(struct RGF_ICR, ICR));
+ bool need_unmask = true;
trace_wil6210_irq_tx(isr);
wil_dbg_irq(wil, "ISR TX 0x%08x\n", isr);
@@ -231,6 +250,7 @@ static irqreturn_t wil6210_irq_tx(int irq, void *cookie)
isr &= ~(BIT(25) - 1UL);
if (test_bit(wil_status_reset_done, &wil->status)) {
wil_dbg_txrx(wil, "NAPI(Tx) schedule\n");
+ need_unmask = false;
napi_schedule(&wil->napi_tx);
} else {
wil_err(wil, "Got Tx interrupt while in reset\n");
@@ -243,6 +263,10 @@ static irqreturn_t wil6210_irq_tx(int irq, void *cookie)
/* Tx IRQ will be enabled when NAPI processing finished */
atomic_inc(&wil->isr_count_tx);
+
+ if (unlikely(need_unmask))
+ wil6210_unmask_irq_tx(wil);
+
return IRQ_HANDLED;
}
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 18cff53..f2f89e0 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -126,6 +126,7 @@ struct RGF_ICR {
#define BIT_DMA_EP_TX_ICR_TX_DONE_N(n) BIT(n+1) /* n = [0..23] */
#define RGF_DMA_EP_RX_ICR (0x881bd0) /* struct RGF_ICR */
#define BIT_DMA_EP_RX_ICR_RX_DONE BIT(0)
+ #define BIT_DMA_EP_RX_ICR_RX_HTRSH BIT(1)
#define RGF_DMA_EP_MISC_ICR (0x881bec) /* struct RGF_ICR */
#define BIT_DMA_EP_MISC_ICR_RX_HTRSH BIT(0)
#define BIT_DMA_EP_MISC_ICR_TX_NO_ACT BIT(1)
@@ -475,6 +476,8 @@ void wil_dbg_trace(struct wil6210_priv *wil, const char *fmt, ...);
__printf(2, 3)
void wil_err(struct wil6210_priv *wil, const char *fmt, ...);
__printf(2, 3)
+void wil_err_ratelimited(struct wil6210_priv *wil, const char *fmt, ...);
+__printf(2, 3)
void wil_info(struct wil6210_priv *wil, const char *fmt, ...);
#define wil_dbg(wil, fmt, arg...) do { \
netdev_dbg(wil_to_ndev(wil), fmt, ##arg); \
--
2.1.0
--
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