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Message-Id: <1215086549.9975.4.camel@johannes.berg>
Date: Thu, 03 Jul 2008 14:02:29 +0200
From: Johannes Berg <johannes@...solutions.net>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, vinay@...ux.vnet.ibm.com,
krkumar2@...ibm.com, mchan@...adcom.com, Matheos.Worku@....COM,
linux-wireless@...r.kernel.org,
Ron Rindjunsky <rindjon@...glemail.com>
Subject: Re: [PATCH 32/39]: mac80211: Reimplement WME using
->select_queue().
On Thu, 2008-07-03 at 12:23 +0200, Johannes Berg wrote:
> Here's a little cleanup patch. My kernel is still compiling so I haven't
> tested it yet though.
This is a fixed version of the patch, but mac80211 still hangs and I
haven't been able to figure out why yet. iwlwifi scans fine, but since
that is hardware-assisted scanning we don't actually send packets, so it
looks like it hangs as soon as the first packet is sent out...
johannes
mac8021: Clean up after multiqueue rework
This cleans up mac80211 and removes a lot of now useless things. Also
removes netif_is_multiqueue().
Signed-off-by: Johannes Berg <johannes@...solutions.net>
---
include/linux/netdevice.h | 11 -----------
include/net/mac80211.h | 8 --------
net/mac80211/Kconfig | 10 ----------
net/mac80211/Makefile | 4 ++--
net/mac80211/ieee80211_i.h | 9 ---------
net/mac80211/main.c | 9 ++-------
net/mac80211/util.c | 14 ++------------
net/mac80211/wme.c | 14 +-------------
net/mac80211/wme.h | 22 +---------------------
9 files changed, 8 insertions(+), 93 deletions(-)
--- everything.orig/net/mac80211/ieee80211_i.h 2008-07-03 11:43:40.000000000 +0200
+++ everything/net/mac80211/ieee80211_i.h 2008-07-03 11:50:28.000000000 +0200
@@ -757,15 +757,6 @@ struct ieee80211_local {
#endif
};
-static inline int ieee80211_is_multiqueue(struct ieee80211_local *local)
-{
-#ifdef CONFIG_MAC80211_QOS
- return netif_is_multiqueue(local->mdev);
-#else
- return 0;
-#endif
-}
-
/* this struct represents 802.11n's RA/TID combination */
struct ieee80211_ra_tid {
u8 ra[ETH_ALEN];
--- everything.orig/net/mac80211/util.c 2008-07-03 11:43:53.000000000 +0200
+++ everything/net/mac80211/util.c 2008-07-03 11:51:02.000000000 +0200
@@ -363,12 +363,7 @@ void ieee80211_wake_queue(struct ieee802
if (test_bit(queue, local->queues_pending)) {
tasklet_schedule(&local->tx_pending_tasklet);
} else {
- if (ieee80211_is_multiqueue(local)) {
- netif_wake_subqueue(local->mdev, queue);
- } else {
- WARN_ON(queue != 0);
- netif_wake_queue(local->mdev);
- }
+ netif_wake_subqueue(local->mdev, queue);
}
}
EXPORT_SYMBOL(ieee80211_wake_queue);
@@ -377,12 +372,7 @@ void ieee80211_stop_queue(struct ieee802
{
struct ieee80211_local *local = hw_to_local(hw);
- if (ieee80211_is_multiqueue(local)) {
- netif_stop_subqueue(local->mdev, queue);
- } else {
- WARN_ON(queue != 0);
- netif_stop_queue(local->mdev);
- }
+ netif_stop_subqueue(local->mdev, queue);
}
EXPORT_SYMBOL(ieee80211_stop_queue);
--- everything.orig/net/mac80211/wme.c 2008-07-03 11:43:19.000000000 +0200
+++ everything/net/mac80211/wme.c 2008-07-03 11:54:48.000000000 +0200
@@ -115,8 +115,7 @@ static u16 classify80211(struct sk_buff
}
-static u16 ieee80211_select_queue(struct net_device *dev,
- struct sk_buff *skb)
+u16 ieee80211_select_queue(struct net_device *dev, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
@@ -157,17 +156,6 @@ static u16 ieee80211_select_queue(struct
return queue;
}
-void ieee80211_install_qdisc(struct net_device *dev)
-{
- dev->select_queue = ieee80211_select_queue;
-}
-
-
-int ieee80211_qdisc_installed(struct net_device *dev)
-{
- return dev->select_queue == ieee80211_select_queue;
-}
-
int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
struct sta_info *sta, u16 tid)
{
--- everything.orig/net/mac80211/wme.h 2008-07-03 11:43:09.000000000 +0200
+++ everything/net/mac80211/wme.h 2008-07-03 12:02:29.000000000 +0200
@@ -31,30 +31,10 @@ static inline int WLAN_FC_IS_QOS_DATA(u1
return (fc & 0x8C) == 0x88;
}
-#ifdef CONFIG_MAC80211_QOS
-void ieee80211_install_qdisc(struct net_device *dev);
-int ieee80211_qdisc_installed(struct net_device *dev);
int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
struct sta_info *sta, u16 tid);
void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local,
struct sta_info *sta, u16 tid);
-#else
-static inline void ieee80211_install_qdisc(struct net_device *dev)
-{
-}
-static inline int ieee80211_qdisc_installed(struct net_device *dev)
-{
- return 0;
-}
-static inline int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
- struct sta_info *sta, u16 tid)
-{
- return -EAGAIN;
-}
-static inline void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local,
- struct sta_info *sta, u16 tid)
-{
-}
-#endif /* CONFIG_NET_SCHED */
+u16 ieee80211_select_queue(struct net_device *dev, struct sk_buff *skb);
#endif /* _WME_H */
--- everything.orig/include/linux/netdevice.h 2008-07-03 11:51:50.000000000 +0200
+++ everything/include/linux/netdevice.h 2008-07-03 11:51:56.000000000 +0200
@@ -1175,17 +1175,6 @@ static inline void netif_wake_subqueue(s
__netif_schedule(txq);
}
-/**
- * netif_is_multiqueue - test if device has multiple transmit queues
- * @dev: network device
- *
- * Check if device has multiple transmit queues
- */
-static inline int netif_is_multiqueue(const struct net_device *dev)
-{
- return (dev->num_tx_queues > 1);
-}
-
/* Use this variant when it is known for sure that it
* is executing from hardware interrupt context or with hardware interrupts
* disabled.
--- everything.orig/net/mac80211/Kconfig 2008-07-03 11:43:31.000000000 +0200
+++ everything/net/mac80211/Kconfig 2008-07-03 11:52:57.000000000 +0200
@@ -11,16 +11,6 @@ config MAC80211
This option enables the hardware independent IEEE 802.11
networking stack.
-config MAC80211_QOS
- def_bool y
- depends on MAC80211
- depends on NET_SCHED
-
-comment "QoS/HT support disabled"
- depends on MAC80211 && !MAC80211_QOS
-comment "QoS/HT support needs CONFIG_NET_SCHED"
- depends on MAC80211 && !NET_SCHED
-
menu "Rate control algorithm selection"
depends on MAC80211 != n
--- everything.orig/net/mac80211/Makefile 2008-07-03 11:52:42.000000000 +0200
+++ everything/net/mac80211/Makefile 2008-07-03 11:52:51.000000000 +0200
@@ -26,10 +26,10 @@ mac80211-y := \
tx.o \
key.o \
util.o \
- event.o
+ event.o \
+ wme.o
mac80211-$(CONFIG_MAC80211_LEDS) += led.o
-mac80211-$(CONFIG_MAC80211_QOS) += wme.o
mac80211-$(CONFIG_MAC80211_DEBUGFS) += \
debugfs.o \
debugfs_sta.o \
--- everything.orig/net/mac80211/main.c 2008-07-03 11:52:13.000000000 +0200
+++ everything/net/mac80211/main.c 2008-07-03 11:56:51.000000000 +0200
@@ -114,7 +114,7 @@ static int ieee80211_master_open(struct
if (res)
return res;
- netif_start_queue(local->mdev);
+ netif_tx_start_all_queues(local->mdev);
return 0;
}
@@ -1667,17 +1667,12 @@ int ieee80211_register_hw(struct ieee802
* We use the number of queues for feature tests (QoS, HT) internally
* so restrict them appropriately.
*/
-#ifdef CONFIG_MAC80211_QOS
if (hw->queues > IEEE80211_MAX_QUEUES)
hw->queues = IEEE80211_MAX_QUEUES;
if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
if (hw->queues < 4)
hw->ampdu_queues = 0;
-#else
- hw->queues = 1;
- hw->ampdu_queues = 0;
-#endif
/* for now, mdev needs sub_if_data :/ */
mdev = alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data),
@@ -1775,7 +1770,7 @@ int ieee80211_register_hw(struct ieee802
goto fail_wep;
}
- ieee80211_install_qdisc(local->mdev);
+ local->mdev->select_queue = ieee80211_select_queue;
/* add one default STA interface */
result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
--- everything.orig/include/net/mac80211.h 2008-07-03 13:39:28.000000000 +0200
+++ everything/include/net/mac80211.h 2008-07-03 13:39:44.000000000 +0200
@@ -812,20 +812,12 @@ static inline void SET_IEEE80211_PERM_AD
static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw)
{
-#ifdef CONFIG_MAC80211_QOS
return hw->queues;
-#else
- return 1;
-#endif
}
static inline int ieee80211_num_queues(struct ieee80211_hw *hw)
{
-#ifdef CONFIG_MAC80211_QOS
return hw->queues + hw->ampdu_queues;
-#else
- return 1;
-#endif
}
static inline struct ieee80211_rate *
--
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