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* [PATCH 0/7] wil6210 patches
@ 2013-05-12 11:43 Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 1/7] wil6210: 'length' in Tx/Rx descriptors is little endian Vladimir Kondratiev
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

Next bunch of patches.

This time it is all about data path, save for trace support.

Vladimir Kondratiev (7):
  wil6210: 'length' in Tx/Rx descriptors is little endian
  wil6210: Sanity check for reported DMA length
  wil6210: debug dump packet content right after DMA
  wil6210: trace support
  wil6210: use NAPI
  wil6210: fix remaining use of non-cached copy of tx/rx descriptors
  wil6210: do not stop Tx queue on packet drop

 drivers/net/wireless/ath/wil6210/Kconfig     |  12 ++
 drivers/net/wireless/ath/wil6210/Makefile    |  21 ++-
 drivers/net/wireless/ath/wil6210/debug.c     |  70 ++++++++
 drivers/net/wireless/ath/wil6210/debugfs.c   |   8 +-
 drivers/net/wireless/ath/wil6210/interrupt.c |  29 ++--
 drivers/net/wireless/ath/wil6210/main.c      |   6 +
 drivers/net/wireless/ath/wil6210/netdev.c    |  54 ++++++
 drivers/net/wireless/ath/wil6210/trace.c     |  20 +++
 drivers/net/wireless/ath/wil6210/trace.h     | 235 +++++++++++++++++++++++++++
 drivers/net/wireless/ath/wil6210/txrx.c      | 175 ++++++++++++--------
 drivers/net/wireless/ath/wil6210/txrx.h      |  32 +++-
 drivers/net/wireless/ath/wil6210/wil6210.h   |  26 ++-
 drivers/net/wireless/ath/wil6210/wmi.c       |   8 +-
 13 files changed, 589 insertions(+), 107 deletions(-)
 create mode 100644 drivers/net/wireless/ath/wil6210/debug.c
 create mode 100644 drivers/net/wireless/ath/wil6210/trace.c
 create mode 100644 drivers/net/wireless/ath/wil6210/trace.h

-- 
1.8.1.2


^ permalink raw reply	[flat|nested] 8+ messages in thread
* [PATCH 1/7] wil6210: 'length' in Tx/Rx descriptors is little endian
  2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
@ 2013-05-12 11:43 ` Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 2/7] wil6210: Sanity check for reported DMA length Vladimir Kondratiev
                   ` (5 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

Hardware uses little endian for the Tx/Rx descriptors field 'length',
do appropriate conversions

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/debugfs.c |  8 +++++++-
 drivers/net/wireless/ath/wil6210/txrx.c    | 33 +++++++++++++++++++-----------
 drivers/net/wireless/ath/wil6210/txrx.h    |  4 ++--
 3 files changed, 30 insertions(+), 15 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 4be07f5..b32c58e 100644
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -418,9 +418,15 @@ static int wil_txdesc_debugfs_show(struct seq_file *s, void *data)
 		if (skb) {
 			unsigned char printbuf[16 * 3 + 2];
 			int i = 0;
-			int len = skb_headlen(skb);
+			int len = le16_to_cpu(d->dma.length);
 			void *p = skb->data;
 
+			if (len != skb_headlen(skb)) {
+				seq_printf(s, "!!! len: desc = %d skb = %d\n",
+					   len, skb_headlen(skb));
+				len = min_t(int, len, skb_headlen(skb));
+			}
+
 			seq_printf(s, "    len = %d\n", len);
 
 			while (i < len) {
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 91454a4..b9cac7d 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -108,19 +108,21 @@ static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
 	size_t sz = vring->size * sizeof(vring->va[0]);
 
 	while (!wil_vring_is_empty(vring)) {
+		u16 dmalen;
 		if (tx) {
 			volatile struct vring_tx_desc *d =
 					&vring->va[vring->swtail].tx;
 			dma_addr_t pa = d->dma.addr_low |
 					((u64)d->dma.addr_high << 32);
 			struct sk_buff *skb = vring->ctx[vring->swtail];
+			dmalen = le16_to_cpu(d->dma.length);
 			if (skb) {
-				dma_unmap_single(dev, pa, d->dma.length,
+				dma_unmap_single(dev, pa, dmalen,
 						 DMA_TO_DEVICE);
 				dev_kfree_skb_any(skb);
 				vring->ctx[vring->swtail] = NULL;
 			} else {
-				dma_unmap_page(dev, pa, d->dma.length,
+				dma_unmap_page(dev, pa, dmalen,
 					       DMA_TO_DEVICE);
 			}
 			vring->swtail = wil_vring_next_tail(vring);
@@ -130,8 +132,8 @@ static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
 			dma_addr_t pa = d->dma.addr_low |
 					((u64)d->dma.addr_high << 32);
 			struct sk_buff *skb = vring->ctx[vring->swhead];
-			dma_unmap_single(dev, pa, d->dma.length,
-					 DMA_FROM_DEVICE);
+			dmalen = le16_to_cpu(d->dma.length);
+			dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE);
 			kfree_skb(skb);
 			wil_vring_advance_head(vring, 1);
 		}
@@ -177,7 +179,7 @@ static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring,
 	/* b11 don't care */
 	/* error don't care */
 	d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
-	d->dma.length = sz;
+	d->dma.length = cpu_to_le16(sz);
 	vring->ctx[i] = skb;
 
 	return 0;
@@ -328,6 +330,7 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	struct sk_buff *skb;
 	dma_addr_t pa;
 	unsigned int sz = RX_BUF_LEN;
+	u16 dmalen;
 	u8 ftype;
 	u8 ds_bits;
 
@@ -345,10 +348,11 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
 	skb = vring->ctx[vring->swhead];
 	dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE);
-	skb_trim(skb, d->dma.length);
 
 	d1 = wil_skb_rxdesc(skb);
 	*d1 = *d;
+	dmalen = le16_to_cpu(d1->dma.length);
+	skb_trim(skb, dmalen);
 
 	wil->stats.last_mcs_rx = wil_rxdesc_mcs(d1);
 
@@ -612,7 +616,7 @@ static int wil_tx_desc_map(volatile struct vring_tx_desc *d,
 	d->dma.b11 = 0/*14 | BIT(7)*/;
 	d->dma.error = 0;
 	d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
-	d->dma.length = len;
+	d->dma.length = cpu_to_le16((u16)len);
 	d->dma.d0 = 0;
 	d->mac.d[0] = 0;
 	d->mac.d[1] = 0;
@@ -707,14 +711,17 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
 	/* unmap what we have mapped */
 	/* Note: increment @f to operate with positive index */
 	for (f++; f > 0; f--) {
+		u16 dmalen;
+
 		i = (swhead + f) % vring->size;
 		d = &(vring->va[i].tx);
 		d->dma.status = TX_DMA_STATUS_DU;
 		pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
+		dmalen = le16_to_cpu(d->dma.length);
 		if (vring->ctx[i])
-			dma_unmap_single(dev, pa, d->dma.length, DMA_TO_DEVICE);
+			dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
 		else
-			dma_unmap_page(dev, pa, d->dma.length, DMA_TO_DEVICE);
+			dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
 	}
 
 	return -EINVAL;
@@ -794,15 +801,17 @@ void wil_tx_complete(struct wil6210_priv *wil, int ringid)
 		struct vring_tx_desc dd, *d = &dd;
 		dma_addr_t pa;
 		struct sk_buff *skb;
+		u16 dmalen;
 
 		dd = *d1;
 
 		if (!(d->dma.status & TX_DMA_STATUS_DU))
 			break;
 
+		dmalen = le16_to_cpu(d->dma.length);
 		wil_dbg_txrx(wil,
 			     "Tx[%3d] : %d bytes, status 0x%02x err 0x%02x\n",
-			     vring->swtail, d->dma.length, d->dma.status,
+			     vring->swtail, dmalen, d->dma.status,
 			     d->dma.error);
 		wil_hex_dump_txrx("TxC ", DUMP_PREFIX_NONE, 32, 4,
 				  (const void *)d, sizeof(*d), false);
@@ -817,11 +826,11 @@ void wil_tx_complete(struct wil6210_priv *wil, int ringid)
 				ndev->stats.tx_errors++;
 			}
 
-			dma_unmap_single(dev, pa, d->dma.length, DMA_TO_DEVICE);
+			dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
 			dev_kfree_skb_any(skb);
 			vring->ctx[vring->swtail] = NULL;
 		} else {
-			dma_unmap_page(dev, pa, d->dma.length, DMA_TO_DEVICE);
+			dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
 		}
 		d->dma.addr_low = 0;
 		d->dma.addr_high = 0;
diff --git a/drivers/net/wireless/ath/wil6210/txrx.h b/drivers/net/wireless/ath/wil6210/txrx.h
index adef12f..a40aa0b 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.h
+++ b/drivers/net/wireless/ath/wil6210/txrx.h
@@ -222,7 +222,7 @@ struct vring_tx_dma {
 	u8  b11;       /* 0..6: mac_length; 7:ip_version */
 	u8  error;     /* 0..2: err; 3..7: reserved; */
 	u8  status;    /* 0: used; 1..7; reserved */
-	u16 length;
+	__le16 length;
 } __packed;
 
 /*
@@ -321,7 +321,7 @@ struct vring_rx_dma {
 	u8  b11;
 	u8  error;
 	u8  status;
-	u16 length;
+	__le16 length;
 } __packed;
 
 struct vring_tx_desc {
-- 
1.8.1.2


^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH 2/7] wil6210: Sanity check for reported DMA length
  2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 1/7] wil6210: 'length' in Tx/Rx descriptors is little endian Vladimir Kondratiev
@ 2013-05-12 11:43 ` Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 3/7] wil6210: debug dump packet content right after DMA Vladimir Kondratiev
                   ` (4 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

If Rx descriptor contains garbage, it is possible to access memory beyond
allocated buffer.

Check this condition and drop Rx if reported length is
unreasonable large

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/txrx.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index b9cac7d..6506b76 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -351,7 +351,13 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 
 	d1 = wil_skb_rxdesc(skb);
 	*d1 = *d;
+	wil_vring_advance_head(vring, 1);
 	dmalen = le16_to_cpu(d1->dma.length);
+	if (dmalen > sz) {
+		wil_err(wil, "Rx size too large: %d bytes!\n", dmalen);
+		kfree(skb);
+		return NULL;
+	}
 	skb_trim(skb, dmalen);
 
 	wil->stats.last_mcs_rx = wil_rxdesc_mcs(d1);
@@ -364,8 +370,6 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4,
 			  (const void *)d, sizeof(*d), false);
 
-	wil_vring_advance_head(vring, 1);
-
 	/* no extra checks if in sniffer mode */
 	if (ndev->type != ARPHRD_ETHER)
 		return skb;
-- 
1.8.1.2


^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH 3/7] wil6210: debug dump packet content right after DMA
  2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 1/7] wil6210: 'length' in Tx/Rx descriptors is little endian Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 2/7] wil6210: Sanity check for reported DMA length Vladimir Kondratiev
@ 2013-05-12 11:43 ` Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 4/7] wil6210: trace support Vladimir Kondratiev
                   ` (3 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

Move packet dump to the earliest location where it is known to have
valid data.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/txrx.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 6506b76..d060511 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -360,6 +360,10 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	}
 	skb_trim(skb, dmalen);
 
+	wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
+			  skb->data, skb_headlen(skb), false);
+
+
 	wil->stats.last_mcs_rx = wil_rxdesc_mcs(d1);
 
 	/* use radiotap header only if required */
@@ -474,8 +478,6 @@ void wil_rx_handle(struct wil6210_priv *wil)
 	}
 	wil_dbg_txrx(wil, "%s()\n", __func__);
 	while (NULL != (skb = wil_vring_reap_rx(wil, v))) {
-		wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
-				  skb->data, skb_headlen(skb), false);
 
 		if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
 			skb->dev = ndev;
-- 
1.8.1.2


^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH 4/7] wil6210: trace support
  2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
                   ` (2 preceding siblings ...)
  2013-05-12 11:43 ` [PATCH 3/7] wil6210: debug dump packet content right after DMA Vladimir Kondratiev
@ 2013-05-12 11:43 ` Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 5/7] wil6210: use NAPI Vladimir Kondratiev
                   ` (2 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

Trace the following:
- WMI cmd/event
- log events
- interrupts
- Tx/Rx

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/Kconfig     |  12 ++
 drivers/net/wireless/ath/wil6210/Makefile    |  21 ++-
 drivers/net/wireless/ath/wil6210/debug.c     |  70 ++++++++
 drivers/net/wireless/ath/wil6210/interrupt.c |   6 +
 drivers/net/wireless/ath/wil6210/trace.c     |  20 +++
 drivers/net/wireless/ath/wil6210/trace.h     | 235 +++++++++++++++++++++++++++
 drivers/net/wireless/ath/wil6210/txrx.c      |  10 +-
 drivers/net/wireless/ath/wil6210/wil6210.h   |  10 +-
 drivers/net/wireless/ath/wil6210/wmi.c       |   8 +-
 9 files changed, 377 insertions(+), 15 deletions(-)
 create mode 100644 drivers/net/wireless/ath/wil6210/debug.c
 create mode 100644 drivers/net/wireless/ath/wil6210/trace.c
 create mode 100644 drivers/net/wireless/ath/wil6210/trace.h

diff --git a/drivers/net/wireless/ath/wil6210/Kconfig b/drivers/net/wireless/ath/wil6210/Kconfig
index bac3d98..5644ac5 100644
--- a/drivers/net/wireless/ath/wil6210/Kconfig
+++ b/drivers/net/wireless/ath/wil6210/Kconfig
@@ -27,3 +27,15 @@ config WIL6210_ISR_COR
 	  self-clear when accessed for debug purposes, it makes
 	  such monitoring impossible.
 	  Say y unless you debug interrupts
+
+config ATH6KL_TRACING
+	bool "wil6210 tracing support"
+	depends on WIL6210
+	depends on EVENT_TRACING
+	default y
+	---help---
+	  Say Y here to enable tracepoints for the wil6210 driver
+	  using the kernel tracing infrastructure.  Select this
+	  option if you are interested in debugging the driver.
+
+	  If unsure, say Y to make it easier to debug problems.
diff --git a/drivers/net/wireless/ath/wil6210/Makefile b/drivers/net/wireless/ath/wil6210/Makefile
index d288eea..f891d51 100644
--- a/drivers/net/wireless/ath/wil6210/Makefile
+++ b/drivers/net/wireless/ath/wil6210/Makefile
@@ -1,15 +1,20 @@
 obj-$(CONFIG_WIL6210) += wil6210.o
 
-wil6210-objs := main.o
-wil6210-objs += netdev.o
-wil6210-objs += cfg80211.o
-wil6210-objs += pcie_bus.o
-wil6210-objs += debugfs.o
-wil6210-objs += wmi.o
-wil6210-objs += interrupt.o
-wil6210-objs += txrx.o
+wil6210-y := main.o
+wil6210-y += netdev.o
+wil6210-y += cfg80211.o
+wil6210-y += pcie_bus.o
+wil6210-y += debugfs.o
+wil6210-y += wmi.o
+wil6210-y += interrupt.o
+wil6210-y += txrx.o
+wil6210-y += debug.o
+wil6210-$(CONFIG_WIL6210_TRACING) += trace.o
 
 ifeq (, $(findstring -W,$(EXTRA_CFLAGS)))
 	subdir-ccflags-y += -Werror
 endif
+# for tracing framework to find trace.h
+CFLAGS_trace.o := -I$(src)
+
 subdir-ccflags-y += -D__CHECK_ENDIAN__
diff --git a/drivers/net/wireless/ath/wil6210/debug.c b/drivers/net/wireless/ath/wil6210/debug.c
new file mode 100644
index 0000000..5f20b4a
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/debug.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "wil6210.h"
+#include "trace.h"
+
+int wil_err(struct wil6210_priv *wil, const char *fmt, ...)
+{
+	struct net_device *ndev = wil_to_ndev(wil);
+	struct va_format vaf = {
+		.fmt = fmt,
+	};
+	va_list args;
+	int ret;
+
+	va_start(args, fmt);
+	vaf.va = &args;
+	ret = netdev_err(ndev, "%pV", &vaf);
+	trace_wil6210_log_err(&vaf);
+	va_end(args);
+
+	return ret;
+}
+
+int wil_info(struct wil6210_priv *wil, const char *fmt, ...)
+{
+	struct net_device *ndev = wil_to_ndev(wil);
+	struct va_format vaf = {
+		.fmt = fmt,
+	};
+	va_list args;
+	int ret;
+
+	va_start(args, fmt);
+	vaf.va = &args;
+	ret = netdev_info(ndev, "%pV", &vaf);
+	trace_wil6210_log_info(&vaf);
+	va_end(args);
+
+	return ret;
+}
+
+int wil_dbg_trace(struct wil6210_priv *wil, const char *fmt, ...)
+{
+	struct va_format vaf = {
+		.fmt = fmt,
+	};
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.va = &args;
+	trace_wil6210_log_dbg(&vaf);
+	va_end(args);
+
+	return 0;
+}
+
diff --git a/drivers/net/wireless/ath/wil6210/interrupt.c b/drivers/net/wireless/ath/wil6210/interrupt.c
index e3c1e76..5fe985c 100644
--- a/drivers/net/wireless/ath/wil6210/interrupt.c
+++ b/drivers/net/wireless/ath/wil6210/interrupt.c
@@ -17,6 +17,7 @@
 #include <linux/interrupt.h>
 
 #include "wil6210.h"
+#include "trace.h"
 
 /**
  * Theory of operation:
@@ -168,6 +169,7 @@ static irqreturn_t wil6210_irq_rx(int irq, void *cookie)
 					 HOSTADDR(RGF_DMA_EP_RX_ICR) +
 					 offsetof(struct RGF_ICR, ICR));
 
+	trace_wil6210_irq_rx(isr);
 	wil_dbg_irq(wil, "ISR RX 0x%08x\n", isr);
 
 	if (!isr) {
@@ -198,6 +200,7 @@ static irqreturn_t wil6210_irq_tx(int irq, void *cookie)
 					 HOSTADDR(RGF_DMA_EP_TX_ICR) +
 					 offsetof(struct RGF_ICR, ICR));
 
+	trace_wil6210_irq_tx(isr);
 	wil_dbg_irq(wil, "ISR TX 0x%08x\n", isr);
 
 	if (!isr) {
@@ -256,6 +259,7 @@ static irqreturn_t wil6210_irq_misc(int irq, void *cookie)
 					 HOSTADDR(RGF_DMA_EP_MISC_ICR) +
 					 offsetof(struct RGF_ICR, ICR));
 
+	trace_wil6210_irq_misc(isr);
 	wil_dbg_irq(wil, "ISR MISC 0x%08x\n", isr);
 
 	if (!isr) {
@@ -301,6 +305,7 @@ static irqreturn_t wil6210_irq_misc_thread(int irq, void *cookie)
 	struct wil6210_priv *wil = cookie;
 	u32 isr = wil->isr_misc;
 
+	trace_wil6210_irq_misc_thread(isr);
 	wil_dbg_irq(wil, "Thread ISR MISC 0x%08x\n", isr);
 
 	if (isr & ISR_MISC_FW_ERROR) {
@@ -408,6 +413,7 @@ static irqreturn_t wil6210_hardirq(int irq, void *cookie)
 	if (wil6210_debug_irq_mask(wil, pseudo_cause))
 		return IRQ_NONE;
 
+	trace_wil6210_irq_pseudo(pseudo_cause);
 	wil_dbg_irq(wil, "Pseudo IRQ 0x%08x\n", pseudo_cause);
 
 	wil6210_mask_irq_pseudo(wil);
diff --git a/drivers/net/wireless/ath/wil6210/trace.c b/drivers/net/wireless/ath/wil6210/trace.c
new file mode 100644
index 0000000..cd2534b
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/trace.c
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/module.h>
+
+#define CREATE_TRACE_POINTS
+#include "trace.h"
diff --git a/drivers/net/wireless/ath/wil6210/trace.h b/drivers/net/wireless/ath/wil6210/trace.h
new file mode 100644
index 0000000..eff1239
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/trace.h
@@ -0,0 +1,235 @@
+/*
+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM wil6210
+#if !defined(WIL6210_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define WIL6210_TRACE_H
+
+#include <linux/tracepoint.h>
+#include "wil6210.h"
+#include "txrx.h"
+
+/* create empty functions when tracing is disabled */
+#if !defined(CONFIG_WIL6210_TRACING) || defined(__CHECKER__)
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(name, proto, ...) \
+static inline void trace_ ## name(proto) {}
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(...)
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(evt_class, name, proto, ...) \
+static inline void trace_ ## name(proto) {}
+#endif /* !CONFIG_WIL6210_TRACING || defined(__CHECKER__) */
+
+DECLARE_EVENT_CLASS(wil6210_wmi,
+	TP_PROTO(u16 id, void *buf, u16 buf_len),
+
+	TP_ARGS(id, buf, buf_len),
+
+	TP_STRUCT__entry(
+		__field(u16, id)
+		__field(u16, buf_len)
+		__dynamic_array(u8, buf, buf_len)
+	),
+
+	TP_fast_assign(
+		__entry->id = id;
+		__entry->buf_len = buf_len;
+		memcpy(__get_dynamic_array(buf), buf, buf_len);
+	),
+
+	TP_printk(
+		"id 0x%04x len %d",
+		__entry->id, __entry->buf_len
+	)
+);
+
+DEFINE_EVENT(wil6210_wmi, wil6210_wmi_cmd,
+	TP_PROTO(u16 id, void *buf, u16 buf_len),
+	TP_ARGS(id, buf, buf_len)
+);
+
+DEFINE_EVENT(wil6210_wmi, wil6210_wmi_event,
+	TP_PROTO(u16 id, void *buf, u16 buf_len),
+	TP_ARGS(id, buf, buf_len)
+);
+
+#define WIL6210_MSG_MAX (200)
+
+DECLARE_EVENT_CLASS(wil6210_log_event,
+	TP_PROTO(struct va_format *vaf),
+	TP_ARGS(vaf),
+	TP_STRUCT__entry(
+		__dynamic_array(char, msg, WIL6210_MSG_MAX)
+	),
+	TP_fast_assign(
+		WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
+				       WIL6210_MSG_MAX,
+				       vaf->fmt,
+				       *vaf->va) >= WIL6210_MSG_MAX);
+	),
+	TP_printk("%s", __get_str(msg))
+);
+
+DEFINE_EVENT(wil6210_log_event, wil6210_log_err,
+	TP_PROTO(struct va_format *vaf),
+	TP_ARGS(vaf)
+);
+
+DEFINE_EVENT(wil6210_log_event, wil6210_log_info,
+	TP_PROTO(struct va_format *vaf),
+	TP_ARGS(vaf)
+);
+
+DEFINE_EVENT(wil6210_log_event, wil6210_log_dbg,
+	TP_PROTO(struct va_format *vaf),
+	TP_ARGS(vaf)
+);
+
+#define wil_pseudo_irq_cause(x) __print_flags(x, "|",	\
+	{BIT_DMA_PSEUDO_CAUSE_RX,	"Rx" },		\
+	{BIT_DMA_PSEUDO_CAUSE_TX,	"Tx" },		\
+	{BIT_DMA_PSEUDO_CAUSE_MISC,	"Misc" })
+
+TRACE_EVENT(wil6210_irq_pseudo,
+	TP_PROTO(u32 x),
+	TP_ARGS(x),
+	TP_STRUCT__entry(
+		__field(u32, x)
+	),
+	TP_fast_assign(
+		__entry->x = x;
+	),
+	TP_printk("cause 0x%08x : %s", __entry->x,
+		  wil_pseudo_irq_cause(__entry->x))
+);
+
+DECLARE_EVENT_CLASS(wil6210_irq,
+	TP_PROTO(u32 x),
+	TP_ARGS(x),
+	TP_STRUCT__entry(
+		__field(u32, x)
+	),
+	TP_fast_assign(
+		__entry->x = x;
+	),
+	TP_printk("cause 0x%08x", __entry->x)
+);
+
+DEFINE_EVENT(wil6210_irq, wil6210_irq_rx,
+	TP_PROTO(u32 x),
+	TP_ARGS(x)
+);
+
+DEFINE_EVENT(wil6210_irq, wil6210_irq_tx,
+	TP_PROTO(u32 x),
+	TP_ARGS(x)
+);
+
+DEFINE_EVENT(wil6210_irq, wil6210_irq_misc,
+	TP_PROTO(u32 x),
+	TP_ARGS(x)
+);
+
+DEFINE_EVENT(wil6210_irq, wil6210_irq_misc_thread,
+	TP_PROTO(u32 x),
+	TP_ARGS(x)
+);
+
+TRACE_EVENT(wil6210_rx,
+	TP_PROTO(u16 index, struct vring_rx_desc *d),
+	TP_ARGS(index, d),
+	TP_STRUCT__entry(
+		__field(u16, index)
+		__field(unsigned int, len)
+		__field(u8, mid)
+		__field(u8, cid)
+		__field(u8, tid)
+		__field(u8, type)
+		__field(u8, subtype)
+		__field(u16, seq)
+		__field(u8, mcs)
+	),
+	TP_fast_assign(
+		__entry->index = index;
+		__entry->len = d->dma.length;
+		__entry->mid = wil_rxdesc_mid(d);
+		__entry->cid = wil_rxdesc_cid(d);
+		__entry->tid = wil_rxdesc_tid(d);
+		__entry->type = wil_rxdesc_ftype(d);
+		__entry->subtype = wil_rxdesc_subtype(d);
+		__entry->seq = wil_rxdesc_seq(d);
+		__entry->mcs = wil_rxdesc_mcs(d);
+	),
+	TP_printk("index %d len %d mid %d cid %d tid %d mcs %d seq 0x%03x"
+		  " type 0x%1x subtype 0x%1x", __entry->index, __entry->len,
+		  __entry->mid, __entry->cid, __entry->tid, __entry->mcs,
+		  __entry->seq, __entry->type, __entry->subtype)
+);
+
+TRACE_EVENT(wil6210_tx,
+	TP_PROTO(u8 vring, u16 index, unsigned int len, u8 frags),
+	TP_ARGS(vring, index, len, frags),
+	TP_STRUCT__entry(
+		__field(u8, vring)
+		__field(u8, frags)
+		__field(u16, index)
+		__field(unsigned int, len)
+	),
+	TP_fast_assign(
+		__entry->vring = vring;
+		__entry->frags = frags;
+		__entry->index = index;
+		__entry->len = len;
+	),
+	TP_printk("vring %d index %d len %d frags %d",
+		  __entry->vring, __entry->index, __entry->len, __entry->frags)
+);
+
+TRACE_EVENT(wil6210_tx_done,
+	TP_PROTO(u8 vring, u16 index, unsigned int len, u8 err),
+	TP_ARGS(vring, index, len, err),
+	TP_STRUCT__entry(
+		__field(u8, vring)
+		__field(u8, err)
+		__field(u16, index)
+		__field(unsigned int, len)
+	),
+	TP_fast_assign(
+		__entry->vring = vring;
+		__entry->index = index;
+		__entry->len = len;
+		__entry->err = err;
+	),
+	TP_printk("vring %d index %d len %d err 0x%02x",
+		  __entry->vring, __entry->index, __entry->len,
+		  __entry->err)
+);
+
+#endif /* WIL6210_TRACE_H || TRACE_HEADER_MULTI_READ*/
+
+#if defined(CONFIG_WIL6210_TRACING) && !defined(__CHECKER__)
+/* we don't want to use include/trace/events */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
+#endif /* defined(CONFIG_WIL6210_TRACING) && !defined(__CHECKER__) */
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index d060511..dfd9848 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -22,6 +22,7 @@
 #include "wil6210.h"
 #include "wmi.h"
 #include "txrx.h"
+#include "trace.h"
 
 static bool rtap_include_phy_info;
 module_param(rtap_include_phy_info, bool, S_IRUGO);
@@ -370,9 +371,11 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	if (ndev->type == ARPHRD_IEEE80211_RADIOTAP)
 		wil_rx_add_radiotap_header(wil, skb);
 
-	wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead, d->dma.length);
+	trace_wil6210_rx(vring->swhead, d1);
+	wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead,
+		     d1->dma.length);
 	wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4,
-			  (const void *)d, sizeof(*d), false);
+			  (const void *)d1, sizeof(*d1), false);
 
 	/* no extra checks if in sniffer mode */
 	if (ndev->type != ARPHRD_ETHER)
@@ -705,6 +708,7 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
 	/* advance swhead */
 	wil_vring_advance_head(vring, nr_frags + 1);
 	wil_dbg_txrx(wil, "Tx swhead %d -> %d\n", swhead, vring->swhead);
+	trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags);
 	iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail));
 	/* hold reference to skb
 	 * to prevent skb release before accounting
@@ -815,6 +819,8 @@ void wil_tx_complete(struct wil6210_priv *wil, int ringid)
 			break;
 
 		dmalen = le16_to_cpu(d->dma.length);
+		trace_wil6210_tx_done(ringid, vring->swtail, dmalen,
+				      d->dma.error);
 		wil_dbg_txrx(wil,
 			     "Tx[%3d] : %d bytes, status 0x%02x err 0x%02x\n",
 			     vring->swtail, dmalen, d->dma.status,
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 8f76ecd..484446e 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -267,9 +267,13 @@ struct wil6210_priv {
 #define wil_to_ndev(i) (wil_to_wdev(i)->netdev)
 #define ndev_to_wil(n) (wdev_to_wil(n->ieee80211_ptr))
 
-#define wil_dbg(wil, fmt, arg...) netdev_dbg(wil_to_ndev(wil), fmt, ##arg)
-#define wil_info(wil, fmt, arg...) netdev_info(wil_to_ndev(wil), fmt, ##arg)
-#define wil_err(wil, fmt, arg...) netdev_err(wil_to_ndev(wil), fmt, ##arg)
+int wil_dbg_trace(struct wil6210_priv *wil, const char *fmt, ...);
+int wil_err(struct wil6210_priv *wil, const char *fmt, ...);
+int wil_info(struct wil6210_priv *wil, const char *fmt, ...);
+#define wil_dbg(wil, fmt, arg...) do { \
+	netdev_dbg(wil_to_ndev(wil), fmt, ##arg); \
+	wil_dbg_trace(wil, fmt, ##arg); \
+} while (0)
 
 #define wil_dbg_irq(wil, fmt, arg...) wil_dbg(wil, "DBG[ IRQ]" fmt, ##arg)
 #define wil_dbg_txrx(wil, fmt, arg...) wil_dbg(wil, "DBG[TXRX]" fmt, ##arg)
diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index 45b04e3..5e01f4e 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -20,6 +20,7 @@
 #include "wil6210.h"
 #include "txrx.h"
 #include "wmi.h"
+#include "trace.h"
 
 /**
  * WMI event receiving - theory of operations
@@ -246,6 +247,8 @@ static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 	iowrite32(r->head = next_head, wil->csr + HOST_MBOX +
 		  offsetof(struct wil6210_mbox_ctl, tx.head));
 
+	trace_wil6210_wmi_cmd(cmdid, buf, len);
+
 	/* interrupt to FW */
 	iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT);
 
@@ -635,8 +638,9 @@ void wmi_recv_cmd(struct wil6210_priv *wil)
 			    hdr.flags);
 		if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 		    (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
-			wil_dbg_wmi(wil, "WMI event 0x%04x\n",
-				    evt->event.wmi.id);
+			u16 id = le16_to_cpu(evt->event.wmi.id);
+			wil_dbg_wmi(wil, "WMI event 0x%04x\n", id);
+			trace_wil6210_wmi_event(id, &evt->event.wmi, len);
 		}
 		wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 				 &evt->event.hdr, sizeof(hdr) + len, true);
-- 
1.8.1.2


^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH 5/7] wil6210: use NAPI
  2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
                   ` (3 preceding siblings ...)
  2013-05-12 11:43 ` [PATCH 4/7] wil6210: trace support Vladimir Kondratiev
@ 2013-05-12 11:43 ` Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 6/7] wil6210: fix remaining use of non-cached copy of tx/rx descriptors Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 7/7] wil6210: do not stop Tx queue on packet drop Vladimir Kondratiev
  6 siblings, 0 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

Introduce NAPI for Rx and Tx completion.

This fixes packet reordering that happens when Rx handled right in
the IRQ: netif_rx puts packet in 'percpu' queue, then network stack
fetches packets from 'percpu' queues for processing, with different
pattern of queue switching. As result, network stack see packets
in different order. This causes hard to understand TCP throughput
degradation in about 30min

Complete polling if only one packet was processed - this eliminates
empty polls that would be otherwise done at the end of each burst

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/interrupt.c | 23 +++++-------
 drivers/net/wireless/ath/wil6210/main.c      |  6 ++++
 drivers/net/wireless/ath/wil6210/netdev.c    | 54 ++++++++++++++++++++++++++++
 drivers/net/wireless/ath/wil6210/txrx.c      | 23 +++++++-----
 drivers/net/wireless/ath/wil6210/wil6210.h   | 16 ++++++---
 5 files changed, 94 insertions(+), 28 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/interrupt.c b/drivers/net/wireless/ath/wil6210/interrupt.c
index 5fe985c..8205d3e 100644
--- a/drivers/net/wireless/ath/wil6210/interrupt.c
+++ b/drivers/net/wireless/ath/wil6210/interrupt.c
@@ -104,14 +104,14 @@ static void wil6210_mask_irq_pseudo(struct wil6210_priv *wil)
 	clear_bit(wil_status_irqen, &wil->status);
 }
 
-static void wil6210_unmask_irq_tx(struct wil6210_priv *wil)
+void wil6210_unmask_irq_tx(struct wil6210_priv *wil)
 {
 	iowrite32(WIL6210_IMC_TX, wil->csr +
 		  HOSTADDR(RGF_DMA_EP_TX_ICR) +
 		  offsetof(struct RGF_ICR, IMC));
 }
 
-static void wil6210_unmask_irq_rx(struct wil6210_priv *wil)
+void wil6210_unmask_irq_rx(struct wil6210_priv *wil)
 {
 	iowrite32(WIL6210_IMC_RX, wil->csr +
 		  HOSTADDR(RGF_DMA_EP_RX_ICR) +
@@ -182,13 +182,14 @@ static irqreturn_t wil6210_irq_rx(int irq, void *cookie)
 	if (isr & BIT_DMA_EP_RX_ICR_RX_DONE) {
 		wil_dbg_irq(wil, "RX done\n");
 		isr &= ~BIT_DMA_EP_RX_ICR_RX_DONE;
-		wil_rx_handle(wil);
+		wil_dbg_txrx(wil, "NAPI schedule\n");
+		napi_schedule(&wil->napi_rx);
 	}
 
 	if (isr)
 		wil_err(wil, "un-handled RX ISR bits 0x%08x\n", isr);
 
-	wil6210_unmask_irq_rx(wil);
+	/* Rx IRQ will be enabled when NAPI processing finished */
 
 	return IRQ_HANDLED;
 }
@@ -211,23 +212,17 @@ static irqreturn_t wil6210_irq_tx(int irq, void *cookie)
 	wil6210_mask_irq_tx(wil);
 
 	if (isr & BIT_DMA_EP_TX_ICR_TX_DONE) {
-		uint i;
 		wil_dbg_irq(wil, "TX done\n");
+		napi_schedule(&wil->napi_tx);
 		isr &= ~BIT_DMA_EP_TX_ICR_TX_DONE;
-		for (i = 0; i < 24; i++) {
-			u32 mask = BIT_DMA_EP_TX_ICR_TX_DONE_N(i);
-			if (isr & mask) {
-				isr &= ~mask;
-				wil_dbg_irq(wil, "TX done(%i)\n", i);
-				wil_tx_complete(wil, i);
-			}
-		}
+		/* clear also all VRING interrupts */
+		isr &= ~(BIT(25) - 1UL);
 	}
 
 	if (isr)
 		wil_err(wil, "un-handled TX ISR bits 0x%08x\n", isr);
 
-	wil6210_unmask_irq_tx(wil);
+	/* Tx IRQ will be enabled when NAPI processing finished */
 
 	return IRQ_HANDLED;
 }
diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index a0478e2..ea49c8a 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -365,6 +365,9 @@ static int __wil_up(struct wil6210_priv *wil)
 	/* Rx VRING. After MAC and beacon */
 	wil_rx_init(wil);
 
+	napi_enable(&wil->napi_rx);
+	napi_enable(&wil->napi_tx);
+
 	return 0;
 }
 
@@ -381,6 +384,9 @@ int wil_up(struct wil6210_priv *wil)
 
 static int __wil_down(struct wil6210_priv *wil)
 {
+	napi_disable(&wil->napi_rx);
+	napi_disable(&wil->napi_tx);
+
 	if (wil->scan_request) {
 		cfg80211_scan_done(wil->scan_request, true);
 		wil->scan_request = NULL;
diff --git a/drivers/net/wireless/ath/wil6210/netdev.c b/drivers/net/wireless/ath/wil6210/netdev.c
index 098a8ec..29dd1e5 100644
--- a/drivers/net/wireless/ath/wil6210/netdev.c
+++ b/drivers/net/wireless/ath/wil6210/netdev.c
@@ -40,6 +40,55 @@ static const struct net_device_ops wil_netdev_ops = {
 	.ndo_validate_addr	= eth_validate_addr,
 };
 
+static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
+{
+	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
+						napi_rx);
+	int quota = budget;
+	int done;
+
+	wil_rx_handle(wil, &quota);
+	done = budget - quota;
+
+	if (done <= 1) { /* burst ends - only one packet processed */
+		napi_complete(napi);
+		wil6210_unmask_irq_rx(wil);
+		wil_dbg_txrx(wil, "NAPI RX complete\n");
+	}
+
+	wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
+
+	return done;
+}
+
+static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
+{
+	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
+						napi_tx);
+	int tx_done = 0;
+	uint i;
+
+	/* always process ALL Tx complete, regardless budget - it is fast */
+	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
+		struct vring *vring = &wil->vring_tx[i];
+
+		if (!vring->va)
+			continue;
+
+		tx_done += wil_tx_complete(wil, i);
+	}
+
+	if (tx_done <= 1) { /* burst ends - only one packet processed */
+		napi_complete(napi);
+		wil6210_unmask_irq_tx(wil);
+		wil_dbg_txrx(wil, "NAPI TX complete\n");
+	}
+
+	wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
+
+	return min(tx_done, budget);
+}
+
 void *wil_if_alloc(struct device *dev, void __iomem *csr)
 {
 	struct net_device *ndev;
@@ -81,6 +130,11 @@ void *wil_if_alloc(struct device *dev, void __iomem *csr)
 	SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
 	wdev->netdev = ndev;
 
+	netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
+		       WIL6210_NAPI_BUDGET);
+	netif_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
+		       WIL6210_NAPI_BUDGET);
+
 	wil_link_off(wil);
 
 	return wil;
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index dfd9848..109f9bd 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -442,6 +442,7 @@ static int wil_rx_refill(struct wil6210_priv *wil, int count)
 
 /*
  * Pass Rx packet to the netif. Update statistics.
+ * Called in softirq context (NAPI poll).
  */
 static void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev)
 {
@@ -450,10 +451,7 @@ static void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev)
 
 	skb_orphan(skb);
 
-	if (in_interrupt())
-		rc = netif_rx(skb);
-	else
-		rc = netif_rx_ni(skb);
+	rc = netif_receive_skb(skb);
 
 	if (likely(rc == NET_RX_SUCCESS)) {
 		ndev->stats.rx_packets++;
@@ -467,9 +465,9 @@ static void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev)
 /**
  * Proceed all completed skb's from Rx VRING
  *
- * Safe to call from IRQ
+ * Safe to call from NAPI poll, i.e. softirq with interrupts enabled
  */
-void wil_rx_handle(struct wil6210_priv *wil)
+void wil_rx_handle(struct wil6210_priv *wil, int *quota)
 {
 	struct net_device *ndev = wil_to_ndev(wil);
 	struct vring *v = &wil->vring_rx;
@@ -480,7 +478,8 @@ void wil_rx_handle(struct wil6210_priv *wil)
 		return;
 	}
 	wil_dbg_txrx(wil, "%s()\n", __func__);
-	while (NULL != (skb = wil_vring_reap_rx(wil, v))) {
+	while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) {
+		(*quota)--;
 
 		if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
 			skb->dev = ndev;
@@ -790,17 +789,20 @@ netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 /**
  * Clean up transmitted skb's from the Tx VRING
  *
+ * Return number of descriptors cleared
+ *
  * Safe to call from IRQ
  */
-void wil_tx_complete(struct wil6210_priv *wil, int ringid)
+int wil_tx_complete(struct wil6210_priv *wil, int ringid)
 {
 	struct net_device *ndev = wil_to_ndev(wil);
 	struct device *dev = wil_to_dev(wil);
 	struct vring *vring = &wil->vring_tx[ringid];
+	int done = 0;
 
 	if (!vring->va) {
 		wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid);
-		return;
+		return 0;
 	}
 
 	wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid);
@@ -849,7 +851,10 @@ void wil_tx_complete(struct wil6210_priv *wil, int ringid)
 		d->dma.length = 0;
 		d->dma.status = TX_DMA_STATUS_DU;
 		vring->swtail = wil_vring_next_tail(vring);
+		done++;
 	}
 	if (wil_vring_avail_tx(vring) > vring->size/4)
 		netif_tx_wake_all_queues(wil_to_ndev(wil));
+
+	return done;
 }
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 484446e..2e3c26e 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -34,9 +34,11 @@ static inline u32 WIL_GET_BITS(u32 x, int b0, int b1)
 
 #define WIL6210_MEM_SIZE (2*1024*1024UL)
 
-#define WIL6210_RX_RING_SIZE (128)
-#define WIL6210_TX_RING_SIZE (128)
-#define WIL6210_MAX_TX_RINGS (24)
+#define WIL6210_RX_RING_SIZE	(128)
+#define WIL6210_TX_RING_SIZE	(128)
+#define WIL6210_MAX_TX_RINGS	(24) /* HW limit */
+#define WIL6210_MAX_CID		(8) /* HW limit */
+#define WIL6210_NAPI_BUDGET	(16) /* arbitrary */
 
 /* Hardware definitions begin */
 
@@ -239,6 +241,8 @@ struct wil6210_priv {
 	 * - consumed in thread by wmi_event_worker
 	 */
 	spinlock_t wmi_ev_lock;
+	struct napi_struct napi_rx;
+	struct napi_struct napi_tx;
 	/* DMA related */
 	struct vring vring_rx;
 	struct vring vring_tx[WIL6210_MAX_TX_RINGS];
@@ -360,10 +364,12 @@ int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size,
 void wil_vring_fini_tx(struct wil6210_priv *wil, int id);
 
 netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev);
-void wil_tx_complete(struct wil6210_priv *wil, int ringid);
+int wil_tx_complete(struct wil6210_priv *wil, int ringid);
+void wil6210_unmask_irq_tx(struct wil6210_priv *wil);
 
 /* RX API */
-void wil_rx_handle(struct wil6210_priv *wil);
+void wil_rx_handle(struct wil6210_priv *wil, int *quota);
+void wil6210_unmask_irq_rx(struct wil6210_priv *wil);
 
 int wil_iftype_nl2wmi(enum nl80211_iftype type);
 
-- 
1.8.1.2


^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH 6/7] wil6210: fix remaining use of non-cached copy of tx/rx descriptors
  2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
                   ` (4 preceding siblings ...)
  2013-05-12 11:43 ` [PATCH 5/7] wil6210: use NAPI Vladimir Kondratiev
@ 2013-05-12 11:43 ` Vladimir Kondratiev
  2013-05-12 11:43 ` [PATCH 7/7] wil6210: do not stop Tx queue on packet drop Vladimir Kondratiev
  6 siblings, 0 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

- Introduce common code for Tx/Rx descriptor physical address set/parse
- Fix endianness for address fields
- consistent descriptor naming: '_d' for non-cached memory, 'd' for cached copy
- wil_tx_desc_map now modify cached copy, no need for 'volatile'

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/txrx.c | 106 ++++++++++++++++++--------------
 drivers/net/wireless/ath/wil6210/txrx.h |  28 +++++++--
 2 files changed, 84 insertions(+), 50 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 109f9bd..5a0657c 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -92,8 +92,8 @@ static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring)
 	 * we can use any
 	 */
 	for (i = 0; i < vring->size; i++) {
-		volatile struct vring_tx_desc *d = &(vring->va[i].tx);
-		d->dma.status = TX_DMA_STATUS_DU;
+		volatile struct vring_tx_desc *_d = &(vring->va[i].tx);
+		_d->dma.status = TX_DMA_STATUS_DU;
 	}
 
 	wil_dbg_misc(wil, "vring[%d] 0x%p:0x%016llx 0x%p\n", vring->size,
@@ -109,14 +109,19 @@ static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
 	size_t sz = vring->size * sizeof(vring->va[0]);
 
 	while (!wil_vring_is_empty(vring)) {
+		dma_addr_t pa;
+		struct sk_buff *skb;
 		u16 dmalen;
+
 		if (tx) {
-			volatile struct vring_tx_desc *d =
+			struct vring_tx_desc dd, *d = &dd;
+			volatile struct vring_tx_desc *_d =
 					&vring->va[vring->swtail].tx;
-			dma_addr_t pa = d->dma.addr_low |
-					((u64)d->dma.addr_high << 32);
-			struct sk_buff *skb = vring->ctx[vring->swtail];
+
+			*d = *_d;
+			pa = wil_desc_addr(&d->dma.addr);
 			dmalen = le16_to_cpu(d->dma.length);
+			skb = vring->ctx[vring->swtail];
 			if (skb) {
 				dma_unmap_single(dev, pa, dmalen,
 						 DMA_TO_DEVICE);
@@ -128,12 +133,14 @@ static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
 			}
 			vring->swtail = wil_vring_next_tail(vring);
 		} else { /* rx */
-			volatile struct vring_rx_desc *d =
+			struct vring_rx_desc dd, *d = &dd;
+			volatile struct vring_rx_desc *_d =
 					&vring->va[vring->swtail].rx;
-			dma_addr_t pa = d->dma.addr_low |
-					((u64)d->dma.addr_high << 32);
-			struct sk_buff *skb = vring->ctx[vring->swhead];
+
+			*d = *_d;
+			pa = wil_desc_addr(&d->dma.addr);
 			dmalen = le16_to_cpu(d->dma.length);
+			skb = vring->ctx[vring->swhead];
 			dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE);
 			kfree_skb(skb);
 			wil_vring_advance_head(vring, 1);
@@ -156,7 +163,8 @@ static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring,
 {
 	struct device *dev = wil_to_dev(wil);
 	unsigned int sz = RX_BUF_LEN;
-	volatile struct vring_rx_desc *d = &(vring->va[i].rx);
+	struct vring_rx_desc dd, *d = &dd;
+	volatile struct vring_rx_desc *_d = &(vring->va[i].rx);
 	dma_addr_t pa;
 
 	/* TODO align */
@@ -174,13 +182,13 @@ static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring,
 	}
 
 	d->dma.d0 = BIT(9) | RX_DMA_D0_CMD_DMA_IT;
-	d->dma.addr_low = lower_32_bits(pa);
-	d->dma.addr_high = (u16)upper_32_bits(pa);
+	wil_desc_addr_set(&d->dma.addr, pa);
 	/* ip_length don't care */
 	/* b11 don't care */
 	/* error don't care */
 	d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
 	d->dma.length = cpu_to_le16(sz);
+	*_d = *d;
 	vring->ctx[i] = skb;
 
 	return 0;
@@ -326,8 +334,8 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 {
 	struct device *dev = wil_to_dev(wil);
 	struct net_device *ndev = wil_to_ndev(wil);
-	volatile struct vring_rx_desc *d;
-	struct vring_rx_desc *d1;
+	volatile struct vring_rx_desc *_d;
+	struct vring_rx_desc *d;
 	struct sk_buff *skb;
 	dma_addr_t pa;
 	unsigned int sz = RX_BUF_LEN;
@@ -340,20 +348,27 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	if (wil_vring_is_empty(vring))
 		return NULL;
 
-	d = &(vring->va[vring->swhead].rx);
-	if (!(d->dma.status & RX_DMA_STATUS_DU)) {
+	_d = &(vring->va[vring->swhead].rx);
+	if (!(_d->dma.status & RX_DMA_STATUS_DU)) {
 		/* it is not error, we just reached end of Rx done area */
 		return NULL;
 	}
 
-	pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
 	skb = vring->ctx[vring->swhead];
+	d = wil_skb_rxdesc(skb);
+	*d = *_d;
+	pa = wil_desc_addr(&d->dma.addr);
+	vring->ctx[vring->swhead] = NULL;
+	wil_vring_advance_head(vring, 1);
+
 	dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE);
+	dmalen = le16_to_cpu(d->dma.length);
+
+	trace_wil6210_rx(vring->swhead, d);
+	wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead, dmalen);
+	wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4,
+			  (const void *)d, sizeof(*d), false);
 
-	d1 = wil_skb_rxdesc(skb);
-	*d1 = *d;
-	wil_vring_advance_head(vring, 1);
-	dmalen = le16_to_cpu(d1->dma.length);
 	if (dmalen > sz) {
 		wil_err(wil, "Rx size too large: %d bytes!\n", dmalen);
 		kfree(skb);
@@ -365,18 +380,12 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 			  skb->data, skb_headlen(skb), false);
 
 
-	wil->stats.last_mcs_rx = wil_rxdesc_mcs(d1);
+	wil->stats.last_mcs_rx = wil_rxdesc_mcs(d);
 
 	/* use radiotap header only if required */
 	if (ndev->type == ARPHRD_IEEE80211_RADIOTAP)
 		wil_rx_add_radiotap_header(wil, skb);
 
-	trace_wil6210_rx(vring->swhead, d1);
-	wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead,
-		     d1->dma.length);
-	wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4,
-			  (const void *)d1, sizeof(*d1), false);
-
 	/* no extra checks if in sniffer mode */
 	if (ndev->type != ARPHRD_ETHER)
 		return skb;
@@ -385,7 +394,7 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 	 * Driver should recognize it by frame type, that is found
 	 * in Rx descriptor. If type is not data, it is 802.11 frame as is
 	 */
-	ftype = wil_rxdesc_ftype(d1) << 2;
+	ftype = wil_rxdesc_ftype(d) << 2;
 	if (ftype != IEEE80211_FTYPE_DATA) {
 		wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype);
 		/* TODO: process it */
@@ -400,7 +409,7 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
 		return NULL;
 	}
 
-	ds_bits = wil_rxdesc_ds_bits(d1);
+	ds_bits = wil_rxdesc_ds_bits(d);
 	if (ds_bits == 1) {
 		/*
 		 * HW bug - in ToDS mode, i.e. Rx on AP side,
@@ -614,11 +623,9 @@ static struct vring *wil_find_tx_vring(struct wil6210_priv *wil,
 	return NULL;
 }
 
-static int wil_tx_desc_map(volatile struct vring_tx_desc *d,
-			   dma_addr_t pa, u32 len)
+static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len)
 {
-	d->dma.addr_low = lower_32_bits(pa);
-	d->dma.addr_high = (u16)upper_32_bits(pa);
+	wil_desc_addr_set(&d->dma.addr, pa);
 	d->dma.ip_length = 0;
 	/* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/
 	d->dma.b11 = 0/*14 | BIT(7)*/;
@@ -644,7 +651,8 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
 			struct sk_buff *skb)
 {
 	struct device *dev = wil_to_dev(wil);
-	volatile struct vring_tx_desc *d;
+	struct vring_tx_desc dd, *d = &dd;
+	volatile struct vring_tx_desc *_d;
 	u32 swhead = vring->swhead;
 	int avail = wil_vring_avail_tx(vring);
 	int nr_frags = skb_shinfo(skb)->nr_frags;
@@ -662,7 +670,7 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
 			1 + nr_frags);
 		return -ENOMEM;
 	}
-	d = &(vring->va[i].tx);
+	_d = &(vring->va[i].tx);
 
 	/* FIXME FW can accept only unicast frames for the peer */
 	memcpy(skb->data, wil->dst_addr[vring_index], ETH_ALEN);
@@ -681,25 +689,30 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
 	wil_tx_desc_map(d, pa, skb_headlen(skb));
 	d->mac.d[2] |= ((nr_frags + 1) <<
 		       MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS);
+	if (nr_frags)
+		*_d = *d;
+
 	/* middle segments */
 	for (f = 0; f < nr_frags; f++) {
 		const struct skb_frag_struct *frag =
 				&skb_shinfo(skb)->frags[f];
 		int len = skb_frag_size(frag);
 		i = (swhead + f + 1) % vring->size;
-		d = &(vring->va[i].tx);
+		_d = &(vring->va[i].tx);
 		pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
 				DMA_TO_DEVICE);
 		if (unlikely(dma_mapping_error(dev, pa)))
 			goto dma_error;
 		wil_tx_desc_map(d, pa, len);
 		vring->ctx[i] = NULL;
+		*_d = *d;
 	}
 	/* for the last seg only */
 	d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS);
 	d->dma.d0 |= BIT(9); /* BUG: undocumented bit */
 	d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS);
 	d->dma.d0 |= (vring_index << DMA_CFG_DESC_TX_0_QID_POS);
+	*_d = *d;
 
 	wil_hex_dump_txrx("Tx ", DUMP_PREFIX_NONE, 32, 4,
 			  (const void *)d, sizeof(*d), false);
@@ -723,9 +736,10 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
 		u16 dmalen;
 
 		i = (swhead + f) % vring->size;
-		d = &(vring->va[i].tx);
-		d->dma.status = TX_DMA_STATUS_DU;
-		pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
+		_d = &(vring->va[i].tx);
+		*d = *_d;
+		_d->dma.status = TX_DMA_STATUS_DU;
+		pa = wil_desc_addr(&d->dma.addr);
 		dmalen = le16_to_cpu(d->dma.length);
 		if (vring->ctx[i])
 			dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
@@ -808,14 +822,14 @@ int wil_tx_complete(struct wil6210_priv *wil, int ringid)
 	wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid);
 
 	while (!wil_vring_is_empty(vring)) {
-		volatile struct vring_tx_desc *d1 =
+		volatile struct vring_tx_desc *_d =
 					      &vring->va[vring->swtail].tx;
 		struct vring_tx_desc dd, *d = &dd;
 		dma_addr_t pa;
 		struct sk_buff *skb;
 		u16 dmalen;
 
-		dd = *d1;
+		*d = *_d;
 
 		if (!(d->dma.status & TX_DMA_STATUS_DU))
 			break;
@@ -830,7 +844,7 @@ int wil_tx_complete(struct wil6210_priv *wil, int ringid)
 		wil_hex_dump_txrx("TxC ", DUMP_PREFIX_NONE, 32, 4,
 				  (const void *)d, sizeof(*d), false);
 
-		pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
+		pa = wil_desc_addr(&d->dma.addr);
 		skb = vring->ctx[vring->swtail];
 		if (skb) {
 			if (d->dma.error == 0) {
@@ -846,8 +860,8 @@ int wil_tx_complete(struct wil6210_priv *wil, int ringid)
 		} else {
 			dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
 		}
-		d->dma.addr_low = 0;
-		d->dma.addr_high = 0;
+		d->dma.addr.addr_low = 0;
+		d->dma.addr.addr_high = 0;
 		d->dma.length = 0;
 		d->dma.status = TX_DMA_STATUS_DU;
 		vring->swtail = wil_vring_next_tail(vring);
diff --git a/drivers/net/wireless/ath/wil6210/txrx.h b/drivers/net/wireless/ath/wil6210/txrx.h
index a40aa0b..23c0781 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.h
+++ b/drivers/net/wireless/ath/wil6210/txrx.h
@@ -27,6 +27,28 @@
 #define WIL6210_RTAP_SIZE (128)
 
 /* Tx/Rx path */
+
+/*
+ * Common representation of physical address in Vring
+ */
+struct vring_dma_addr {
+	__le32 addr_low;
+	__le16 addr_high;
+} __packed;
+
+static inline dma_addr_t wil_desc_addr(struct vring_dma_addr *addr)
+{
+	return le32_to_cpu(addr->addr_low) |
+			   ((u64)le16_to_cpu(addr->addr_high) << 32);
+}
+
+static inline void wil_desc_addr_set(struct vring_dma_addr *addr,
+				     dma_addr_t pa)
+{
+	addr->addr_low = cpu_to_le32(lower_32_bits(pa));
+	addr->addr_high = cpu_to_le16((u16)upper_32_bits(pa));
+}
+
 /*
  * Tx descriptor - MAC part
  * [dword 0]
@@ -216,8 +238,7 @@ struct vring_tx_mac {
 
 struct vring_tx_dma {
 	u32 d0;
-	u32 addr_low;
-	u16 addr_high;
+	struct vring_dma_addr addr;
 	u8  ip_length;
 	u8  b11;       /* 0..6: mac_length; 7:ip_version */
 	u8  error;     /* 0..2: err; 3..7: reserved; */
@@ -315,8 +336,7 @@ struct vring_rx_mac {
 
 struct vring_rx_dma {
 	u32 d0;
-	u32 addr_low;
-	u16 addr_high;
+	struct vring_dma_addr addr;
 	u8  ip_length;
 	u8  b11;
 	u8  error;
-- 
1.8.1.2


^ permalink raw reply related	[flat|nested] 8+ messages in thread
* [PATCH 7/7] wil6210: do not stop Tx queue on packet drop
  2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
                   ` (5 preceding siblings ...)
  2013-05-12 11:43 ` [PATCH 6/7] wil6210: fix remaining use of non-cached copy of tx/rx descriptors Vladimir Kondratiev
@ 2013-05-12 11:43 ` Vladimir Kondratiev
  6 siblings, 0 replies; 8+ messages in thread
From: Vladimir Kondratiev @ 2013-05-12 11:43 UTC (permalink / raw)
  To: John W . Linville; +Cc: Vladimir Kondratiev, linux-wireless, Luis R . Rodriguez

Packet drop may be caused by various flows, like disconnect
while Tx packets was queued; this should not lead to stopping
of the Tx queue, or all Tx get stalled.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
---
 drivers/net/wireless/ath/wil6210/txrx.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 5a0657c..8b8405d 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -793,7 +793,6 @@ netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 		break; /* goto drop; */
 	}
  drop:
-	netif_tx_stop_all_queues(ndev);
 	ndev->stats.tx_dropped++;
 	dev_kfree_skb_any(skb);
 
-- 
1.8.1.2


^ permalink raw reply related	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2013-05-12 11:44 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-05-12 11:43 [PATCH 0/7] wil6210 patches Vladimir Kondratiev
2013-05-12 11:43 ` [PATCH 1/7] wil6210: 'length' in Tx/Rx descriptors is little endian Vladimir Kondratiev
2013-05-12 11:43 ` [PATCH 2/7] wil6210: Sanity check for reported DMA length Vladimir Kondratiev
2013-05-12 11:43 ` [PATCH 3/7] wil6210: debug dump packet content right after DMA Vladimir Kondratiev
2013-05-12 11:43 ` [PATCH 4/7] wil6210: trace support Vladimir Kondratiev
2013-05-12 11:43 ` [PATCH 5/7] wil6210: use NAPI Vladimir Kondratiev
2013-05-12 11:43 ` [PATCH 6/7] wil6210: fix remaining use of non-cached copy of tx/rx descriptors Vladimir Kondratiev
2013-05-12 11:43 ` [PATCH 7/7] wil6210: do not stop Tx queue on packet drop Vladimir Kondratiev

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