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Date: Thu, 03 Jul 2008 11:14:08 +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 Rindjunksi <ron.rindjunski@...el.com>
Subject: Re: [PATCH 32/39]: mac80211: Reimplement WME using
->select_queue().
On Thu, 2008-07-03 at 00:05 -0700, David Miller wrote:
> Unfortunately it temporarily loses some features, such
> as packet dropping (easy to add) and requeueing (harder).
>
> But it is so much incredibly simpler now.
Way cool. I don't think we actually need requeue, afaik that's just
because of hardware trying to reject packets (which we're removing and
handling independently) and because of TX-aggregation queues which won't
matter because we use select_queue now.
Ron, can you take a look at that? I think it should be fine as-is. Best
also check out the git tree
(git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-tx-2.6.git) and
look at the resulting code.
I'll also get rid of the dependency on NET_SCHED and fix up the code a
bit.
> Signed-off-by: David S. Miller <davem@...emloft.net>
> ---
> net/mac80211/ieee80211_i.h | 6 +
> net/mac80211/main.c | 16 +--
> net/mac80211/wme.c | 531 ++------------------------------------------
> net/mac80211/wme.h | 19 +--
> 4 files changed, 34 insertions(+), 538 deletions(-)
>
> diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
> index af352c0..0ecc0c0 100644
> --- a/net/mac80211/ieee80211_i.h
> +++ b/net/mac80211/ieee80211_i.h
> @@ -25,6 +25,7 @@
> #include <linux/etherdevice.h>
> #include <net/wireless.h>
> #include <net/iw_handler.h>
> +#include <net/mac80211.h>
> #include "key.h"
> #include "sta_info.h"
>
> @@ -542,6 +543,9 @@ enum {
> IEEE80211_ADDBA_MSG = 4,
> };
>
> +/* maximum number of hardware queues we support. */
> +#define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
> +
> struct ieee80211_local {
> /* embed the driver visible part.
> * don't cast (use the static inlines below), but we keep
> @@ -550,6 +554,8 @@ struct ieee80211_local {
>
> const struct ieee80211_ops *ops;
>
> + unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
> +
> struct net_device *mdev; /* wmaster# - "master" 802.11 device */
> int open_count;
> int monitors, cooked_mntrs;
> diff --git a/net/mac80211/main.c b/net/mac80211/main.c
> index c4d36fe..b78b56e 100644
> --- a/net/mac80211/main.c
> +++ b/net/mac80211/main.c
> @@ -684,7 +684,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
> /* No need to requeue the packets in the agg queue, since we
> * held the tx lock: no packet could be enqueued to the newly
> * allocated queue */
> - ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
> + ieee80211_ht_agg_queue_remove(local, sta, tid);
> #ifdef CONFIG_MAC80211_HT_DEBUG
> printk(KERN_DEBUG "BA request denied - HW unavailable for"
> " tid %d\n", tid);
> @@ -693,8 +693,6 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
> goto err_unlock_queue;
> }
>
> - /* Will put all the packets in the new SW queue */
> - ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
> unlock_all_queues_bh(local->mdev);
> spin_unlock_bh(&sta->lock);
>
> @@ -883,7 +881,7 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
> dev_queue = netdev_get_tx_queue(local->mdev, 0);
> spin_lock_bh(&dev_queue->lock);
> /* remove the queue for this aggregation */
> - ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
> + ieee80211_ht_agg_queue_remove(local, sta, tid);
> spin_unlock_bh(&dev_queue->lock);
>
> /* we just requeued the all the frames that were in the removed
> @@ -1900,19 +1898,10 @@ static int __init ieee80211_init(void)
> if (ret)
> goto out;
>
> - ret = ieee80211_wme_register();
> - if (ret) {
> - printk(KERN_DEBUG "ieee80211_init: failed to "
> - "initialize WME (err=%d)\n", ret);
> - goto out_cleanup_pid;
> - }
> -
> ieee80211_debugfs_netdev_init();
>
> return 0;
>
> - out_cleanup_pid:
> - rc80211_pid_exit();
> out:
> return ret;
> }
> @@ -1930,7 +1919,6 @@ static void __exit ieee80211_exit(void)
> if (mesh_allocated)
> ieee80211s_stop();
>
> - ieee80211_wme_unregister();
> ieee80211_debugfs_netdev_exit();
> }
>
> diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
> index 42b1fbf..3bbee5a 100644
> --- a/net/mac80211/wme.c
> +++ b/net/mac80211/wme.c
> @@ -18,8 +18,6 @@
> #include "ieee80211_i.h"
> #include "wme.h"
>
> -/* maximum number of hardware queues we support. */
> -#define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
> /* current number of hardware queues we support. */
> #define QD_NUM(hw) ((hw)->queues + (hw)->ampdu_queues)
>
> @@ -29,32 +27,14 @@
> */
> const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 };
>
> -struct ieee80211_sched_data
> -{
> - unsigned long qdisc_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
> - struct tcf_proto *filter_list;
> - struct Qdisc *queues[QD_MAX_QUEUES];
> - struct sk_buff_head requeued[QD_MAX_QUEUES];
> -};
> -
> static const char llc_ip_hdr[8] = {0xAA, 0xAA, 0x3, 0, 0, 0, 0x08, 0};
>
> /* given a data frame determine the 802.1p/1d tag to use */
> -static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd)
> +static inline unsigned classify_1d(struct sk_buff *skb, struct net_device *dev)
> {
> struct iphdr *ip;
> - int dscp;
> int offset;
> -
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct tcf_result res = { -1, 0 };
> -
> - /* if there is a user set filter list, call out to that */
> - if (q->filter_list) {
> - tc_classify(skb, q->filter_list, &res);
> - if (res.class != -1)
> - return res.class;
> - }
> + int dscp;
>
> /* skb->priority values from 256->263 are magic values to
> * directly indicate a specific 802.1d priority.
> @@ -99,11 +79,10 @@ static inline int wme_downgrade_ac(struct sk_buff *skb)
> }
>
>
> -/* positive return value indicates which queue to use
> - * negative return value indicates to drop the frame */
> -static int classify80211(struct sk_buff *skb, struct Qdisc *qd)
> +/* positive return value indicates which queue to use */
> +static u16 classify80211(struct sk_buff *skb, struct net_device *dev)
> {
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
> struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
>
> if (!ieee80211_is_data(hdr->frame_control)) {
> @@ -123,14 +102,12 @@ static int classify80211(struct sk_buff *skb, struct Qdisc *qd)
>
> /* use the data classifier to determine what 802.1d tag the
> * data frame has */
> - skb->priority = classify_1d(skb, qd);
> + skb->priority = classify_1d(skb, dev);
>
> /* in case we are a client verify acm is not set for this ac */
> while (unlikely(local->wmm_acm & BIT(skb->priority))) {
> - if (wme_downgrade_ac(skb)) {
> - /* No AC with lower priority has acm=0, drop packet. */
> - return -1;
> - }
> + if (wme_downgrade_ac(skb))
> + return 0;
> }
>
> /* look up which queue to use for frames with this 1d tag */
> @@ -138,40 +115,17 @@ static int classify80211(struct sk_buff *skb, struct Qdisc *qd)
> }
>
>
> -static int wme_qdiscop_enqueue(struct sk_buff *skb, struct Qdisc* qd)
> +static u16 ieee80211_select_queue(struct net_device *dev,
> + struct sk_buff *skb)
> {
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
> struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
> - struct Qdisc *qdisc;
> + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
> + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
> struct sta_info *sta;
> - int err, queue;
> + u16 queue;
> u8 tid;
>
> - if (info->flags & IEEE80211_TX_CTL_REQUEUE) {
> - queue = skb_get_queue_mapping(skb);
> - rcu_read_lock();
> - sta = sta_info_get(local, hdr->addr1);
> - tid = skb->priority & QOS_CONTROL_TAG1D_MASK;
> - if (sta) {
> - int ampdu_queue = sta->tid_to_tx_q[tid];
> - if ((ampdu_queue < QD_NUM(hw)) &&
> - test_bit(ampdu_queue, q->qdisc_pool)) {
> - queue = ampdu_queue;
> - info->flags |= IEEE80211_TX_CTL_AMPDU;
> - } else {
> - info->flags &= ~IEEE80211_TX_CTL_AMPDU;
> - }
> - }
> - rcu_read_unlock();
> - skb_queue_tail(&q->requeued[queue], skb);
> - qd->q.qlen++;
> - return 0;
> - }
> -
> - queue = classify80211(skb, qd);
> + queue = classify80211(skb, dev);
>
> if (unlikely(queue >= local->hw.queues))
> queue = local->hw.queues - 1;
> @@ -193,436 +147,32 @@ static int wme_qdiscop_enqueue(struct sk_buff *skb, struct Qdisc* qd)
>
> sta = sta_info_get(local, hdr->addr1);
> if (sta) {
> - int ampdu_queue = sta->tid_to_tx_q[tid];
> - if ((ampdu_queue < QD_NUM(hw)) &&
> - test_bit(ampdu_queue, q->qdisc_pool)) {
> - queue = ampdu_queue;
> - info->flags |= IEEE80211_TX_CTL_AMPDU;
> - } else {
> - info->flags &= ~IEEE80211_TX_CTL_AMPDU;
> - }
> + queue = sta->tid_to_tx_q[tid];
> + info->flags |= IEEE80211_TX_CTL_AMPDU;
> }
>
> rcu_read_unlock();
> }
>
> - if (unlikely(queue < 0)) {
> - kfree_skb(skb);
> - err = NET_XMIT_DROP;
> - } else {
> - tid = skb->priority & QOS_CONTROL_TAG1D_MASK;
> - skb_set_queue_mapping(skb, queue);
> - qdisc = q->queues[queue];
> - err = qdisc->enqueue(skb, qdisc);
> - if (err == NET_XMIT_SUCCESS) {
> - qd->q.qlen++;
> - qd->bstats.bytes += skb->len;
> - qd->bstats.packets++;
> - return NET_XMIT_SUCCESS;
> - }
> - }
> - qd->qstats.drops++;
> - return err;
> -}
> -
> -
> -/* TODO: clean up the cases where master_hard_start_xmit
> - * returns non 0 - it shouldn't ever do that. Once done we
> - * can remove this function */
> -static int wme_qdiscop_requeue(struct sk_buff *skb, struct Qdisc* qd)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct Qdisc *qdisc;
> - int err;
> -
> - /* we recorded which queue to use earlier! */
> - qdisc = q->queues[skb_get_queue_mapping(skb)];
> -
> - if ((err = qdisc->ops->requeue(skb, qdisc)) == 0) {
> - qd->q.qlen++;
> - return 0;
> - }
> - qd->qstats.drops++;
> - return err;
> -}
> -
> -
> -static struct sk_buff *wme_qdiscop_dequeue(struct Qdisc* qd)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct net_device *dev = qdisc_dev(qd);
> - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - struct sk_buff *skb;
> - struct Qdisc *qdisc;
> - int queue;
> -
> - /* check all the h/w queues in numeric/priority order */
> - for (queue = 0; queue < QD_NUM(hw); queue++) {
> - /* see if there is room in this hardware queue */
> - if (__netif_subqueue_stopped(local->mdev, queue) ||
> - !test_bit(queue, q->qdisc_pool))
> - continue;
> -
> - /* there is space - try and get a frame */
> - skb = skb_dequeue(&q->requeued[queue]);
> - if (skb) {
> - qd->q.qlen--;
> - return skb;
> - }
> -
> - qdisc = q->queues[queue];
> - skb = qdisc->dequeue(qdisc);
> - if (skb) {
> - qd->q.qlen--;
> - return skb;
> - }
> - }
> - /* returning a NULL here when all the h/w queues are full means we
> - * never need to call netif_stop_queue in the driver */
> - return NULL;
> -}
> -
> -
> -static void wme_qdiscop_reset(struct Qdisc* qd)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - int queue;
> -
> - /* QUESTION: should we have some hardware flush functionality here? */
> -
> - for (queue = 0; queue < QD_NUM(hw); queue++) {
> - skb_queue_purge(&q->requeued[queue]);
> - qdisc_reset(q->queues[queue]);
> - }
> - qd->q.qlen = 0;
> -}
> -
> -
> -static void wme_qdiscop_destroy(struct Qdisc* qd)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - int queue;
> -
> - tcf_destroy_chain(q->filter_list);
> - q->filter_list = NULL;
> -
> - for (queue = 0; queue < QD_NUM(hw); queue++) {
> - skb_queue_purge(&q->requeued[queue]);
> - qdisc_destroy(q->queues[queue]);
> - q->queues[queue] = &noop_qdisc;
> - }
> -}
> -
> -
> -/* called whenever parameters are updated on existing qdisc */
> -static int wme_qdiscop_tune(struct Qdisc *qd, struct nlattr *opt)
> -{
> - return 0;
> -}
> -
> -
> -/* called during initial creation of qdisc on device */
> -static int wme_qdiscop_init(struct Qdisc *qd, struct nlattr *opt)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct net_device *dev = qdisc_dev(qd);
> - struct ieee80211_local *local;
> - struct ieee80211_hw *hw;
> - int err = 0, i;
> -
> - /* check that device is a mac80211 device */
> - if (!dev->ieee80211_ptr ||
> - dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
> - return -EINVAL;
> -
> - local = wdev_priv(dev->ieee80211_ptr);
> - hw = &local->hw;
> -
> - /* only allow on master dev */
> - if (dev != local->mdev)
> - return -EINVAL;
> -
> - /* ensure that we are root qdisc */
> - if (qd->parent != TC_H_ROOT)
> - return -EINVAL;
> -
> - if (qd->flags & TCQ_F_INGRESS)
> - return -EINVAL;
> -
> - /* if options were passed in, set them */
> - if (opt)
> - err = wme_qdiscop_tune(qd, opt);
> -
> - /* create child queues */
> - for (i = 0; i < QD_NUM(hw); i++) {
> - skb_queue_head_init(&q->requeued[i]);
> - q->queues[i] = qdisc_create_dflt(qdisc_dev(qd), qd->dev_queue,
> - &pfifo_qdisc_ops,
> - qd->handle);
> - if (!q->queues[i]) {
> - q->queues[i] = &noop_qdisc;
> - printk(KERN_ERR "%s child qdisc %i creation failed\n",
> - dev->name, i);
> - }
> - }
> -
> - /* non-aggregation queues: reserve/mark as used */
> - for (i = 0; i < local->hw.queues; i++)
> - set_bit(i, q->qdisc_pool);
> -
> - return err;
> -}
> -
> -static int wme_qdiscop_dump(struct Qdisc *qd, struct sk_buff *skb)
> -{
> - return -1;
> -}
> -
> -
> -static int wme_classop_graft(struct Qdisc *qd, unsigned long arg,
> - struct Qdisc *new, struct Qdisc **old)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - unsigned long queue = arg - 1;
> -
> - if (queue >= QD_NUM(hw))
> - return -EINVAL;
> -
> - if (!new)
> - new = &noop_qdisc;
> -
> - sch_tree_lock(qd);
> - *old = q->queues[queue];
> - q->queues[queue] = new;
> - qdisc_reset(*old);
> - sch_tree_unlock(qd);
> -
> - return 0;
> -}
> -
> -
> -static struct Qdisc *
> -wme_classop_leaf(struct Qdisc *qd, unsigned long arg)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - unsigned long queue = arg - 1;
> -
> - if (queue >= QD_NUM(hw))
> - return NULL;
> -
> - return q->queues[queue];
> -}
> -
> -
> -static unsigned long wme_classop_get(struct Qdisc *qd, u32 classid)
> -{
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - unsigned long queue = TC_H_MIN(classid);
> -
> - if (queue - 1 >= QD_NUM(hw))
> - return 0;
> -
> return queue;
> }
>
> -
> -static unsigned long wme_classop_bind(struct Qdisc *qd, unsigned long parent,
> - u32 classid)
> -{
> - return wme_classop_get(qd, classid);
> -}
> -
> -
> -static void wme_classop_put(struct Qdisc *q, unsigned long cl)
> -{
> -}
> -
> -
> -static int wme_classop_change(struct Qdisc *qd, u32 handle, u32 parent,
> - struct nlattr **tca, unsigned long *arg)
> -{
> - unsigned long cl = *arg;
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> -
> - if (cl - 1 > QD_NUM(hw))
> - return -ENOENT;
> -
> - /* TODO: put code to program hardware queue parameters here,
> - * to allow programming from tc command line */
> -
> - return 0;
> -}
> -
> -
> -/* we don't support deleting hardware queues
> - * when we add WMM-SA support - TSPECs may be deleted here */
> -static int wme_classop_delete(struct Qdisc *qd, unsigned long cl)
> -{
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> -
> - if (cl - 1 > QD_NUM(hw))
> - return -ENOENT;
> - return 0;
> -}
> -
> -
> -static int wme_classop_dump_class(struct Qdisc *qd, unsigned long cl,
> - struct sk_buff *skb, struct tcmsg *tcm)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> -
> - if (cl - 1 > QD_NUM(hw))
> - return -ENOENT;
> - tcm->tcm_handle = TC_H_MIN(cl);
> - tcm->tcm_parent = qd->handle;
> - tcm->tcm_info = q->queues[cl-1]->handle; /* do we need this? */
> - return 0;
> -}
> -
> -
> -static void wme_classop_walk(struct Qdisc *qd, struct qdisc_walker *arg)
> -{
> - struct ieee80211_local *local = wdev_priv(qdisc_dev(qd)->ieee80211_ptr);
> - struct ieee80211_hw *hw = &local->hw;
> - int queue;
> -
> - if (arg->stop)
> - return;
> -
> - for (queue = 0; queue < QD_NUM(hw); queue++) {
> - if (arg->count < arg->skip) {
> - arg->count++;
> - continue;
> - }
> - /* we should return classids for our internal queues here
> - * as well as the external ones */
> - if (arg->fn(qd, queue+1, arg) < 0) {
> - arg->stop = 1;
> - break;
> - }
> - arg->count++;
> - }
> -}
> -
> -
> -static struct tcf_proto ** wme_classop_find_tcf(struct Qdisc *qd,
> - unsigned long cl)
> -{
> - struct ieee80211_sched_data *q = qdisc_priv(qd);
> -
> - if (cl)
> - return NULL;
> -
> - return &q->filter_list;
> -}
> -
> -
> -/* this qdisc is classful (i.e. has classes, some of which may have leaf qdiscs attached)
> - * - these are the operations on the classes */
> -static const struct Qdisc_class_ops class_ops =
> -{
> - .graft = wme_classop_graft,
> - .leaf = wme_classop_leaf,
> -
> - .get = wme_classop_get,
> - .put = wme_classop_put,
> - .change = wme_classop_change,
> - .delete = wme_classop_delete,
> - .walk = wme_classop_walk,
> -
> - .tcf_chain = wme_classop_find_tcf,
> - .bind_tcf = wme_classop_bind,
> - .unbind_tcf = wme_classop_put,
> -
> - .dump = wme_classop_dump_class,
> -};
> -
> -
> -/* queueing discipline operations */
> -static struct Qdisc_ops wme_qdisc_ops __read_mostly =
> -{
> - .next = NULL,
> - .cl_ops = &class_ops,
> - .id = "ieee80211",
> - .priv_size = sizeof(struct ieee80211_sched_data),
> -
> - .enqueue = wme_qdiscop_enqueue,
> - .dequeue = wme_qdiscop_dequeue,
> - .requeue = wme_qdiscop_requeue,
> - .drop = NULL, /* drop not needed since we are always the root qdisc */
> -
> - .init = wme_qdiscop_init,
> - .reset = wme_qdiscop_reset,
> - .destroy = wme_qdiscop_destroy,
> - .change = wme_qdiscop_tune,
> -
> - .dump = wme_qdiscop_dump,
> -};
> -
> -
> void ieee80211_install_qdisc(struct net_device *dev)
> {
> - struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
> - struct Qdisc *qdisc;
> -
> - qdisc = qdisc_create_dflt(dev, txq,
> - &wme_qdisc_ops, TC_H_ROOT);
> - if (!qdisc) {
> - printk(KERN_ERR "%s: qdisc installation failed\n", dev->name);
> - return;
> - }
> -
> - /* same handle as would be allocated by qdisc_alloc_handle() */
> - qdisc->handle = 0x80010000;
> -
> - qdisc_lock_tree(dev);
> - list_add_tail(&qdisc->list, &txq->qdisc_list);
> - txq->qdisc_sleeping = qdisc;
> - qdisc_unlock_tree(dev);
> + dev->select_queue = ieee80211_select_queue;
> }
>
>
> int ieee80211_qdisc_installed(struct net_device *dev)
> {
> - struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
> -
> - return txq->qdisc_sleeping->ops == &wme_qdisc_ops;
> -}
> -
> -
> -int ieee80211_wme_register(void)
> -{
> - return register_qdisc(&wme_qdisc_ops);
> -}
> -
> -
> -void ieee80211_wme_unregister(void)
> -{
> - unregister_qdisc(&wme_qdisc_ops);
> + return dev->select_queue == ieee80211_select_queue;
> }
>
> int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
> struct sta_info *sta, u16 tid)
> {
> - int i;
> - struct netdev_queue *txq = netdev_get_tx_queue(local->mdev, 0);
> - struct ieee80211_sched_data *q =
> - qdisc_priv(txq->qdisc_sleeping);
> DECLARE_MAC_BUF(mac);
> + int i;
>
> /* prepare the filter and save it for the SW queue
> * matching the received HW queue */
> @@ -632,7 +182,7 @@ int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
>
> /* try to get a Qdisc from the pool */
> for (i = local->hw.queues; i < QD_NUM(&local->hw); i++)
> - if (!test_and_set_bit(i, q->qdisc_pool)) {
> + if (!test_and_set_bit(i, local->queue_pool)) {
> ieee80211_stop_queue(local_to_hw(local), i);
> sta->tid_to_tx_q[tid] = i;
>
> @@ -643,9 +193,8 @@ int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
> #ifdef CONFIG_MAC80211_HT_DEBUG
> if (net_ratelimit())
> printk(KERN_DEBUG "allocated aggregation queue"
> - " %d tid %d addr %s pool=0x%lX\n",
> - i, tid, print_mac(mac, sta->addr),
> - q->qdisc_pool[0]);
> + " %d tid %d addr %s\n",
> + i, tid, print_mac(mac, sta->addr));
> #endif /* CONFIG_MAC80211_HT_DEBUG */
> return 0;
> }
> @@ -657,44 +206,12 @@ int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
> * the caller needs to hold netdev_get_tx_queue(local->mdev, X)->lock
> */
> void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local,
> - struct sta_info *sta, u16 tid,
> - u8 requeue)
> + struct sta_info *sta, u16 tid)
> {
> struct ieee80211_hw *hw = &local->hw;
> - struct netdev_queue *txq = netdev_get_tx_queue(local->mdev, 0);
> - struct ieee80211_sched_data *q =
> - qdisc_priv(txq->qdisc_sleeping);
> int agg_queue = sta->tid_to_tx_q[tid];
>
> /* return the qdisc to the pool */
> - clear_bit(agg_queue, q->qdisc_pool);
> + clear_bit(agg_queue, local->queue_pool);
> sta->tid_to_tx_q[tid] = QD_NUM(hw);
> -
> - if (requeue)
> - ieee80211_requeue(local, agg_queue);
> - else
> - q->queues[agg_queue]->ops->reset(q->queues[agg_queue]);
> -}
> -
> -void ieee80211_requeue(struct ieee80211_local *local, int queue)
> -{
> - struct netdev_queue *txq = netdev_get_tx_queue(local->mdev, 0);
> - struct Qdisc *root_qd = txq->qdisc_sleeping;
> - struct ieee80211_sched_data *q = qdisc_priv(root_qd);
> - struct Qdisc *qdisc = q->queues[queue];
> - struct sk_buff *skb = NULL;
> - u32 len;
> -
> - if (!qdisc || !qdisc->dequeue)
> - return;
> -
> - printk(KERN_DEBUG "requeue: qlen = %d\n", qdisc->q.qlen);
> - for (len = qdisc->q.qlen; len > 0; len--) {
> - skb = qdisc->dequeue(qdisc);
> - root_qd->q.qlen--;
> - /* packet will be classified again and */
> - /* skb->packet_data->queue will be overridden if needed */
> - if (skb)
> - wme_qdiscop_enqueue(skb, root_qd);
> - }
> }
> diff --git a/net/mac80211/wme.h b/net/mac80211/wme.h
> index bbdb533..c79be0e 100644
> --- a/net/mac80211/wme.h
> +++ b/net/mac80211/wme.h
> @@ -37,11 +37,7 @@ 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,
> - u8 requeue);
> -void ieee80211_requeue(struct ieee80211_local *local, int queue);
> -int ieee80211_wme_register(void);
> -void ieee80211_wme_unregister(void);
> + struct sta_info *sta, u16 tid);
> #else
> static inline void ieee80211_install_qdisc(struct net_device *dev)
> {
> @@ -56,18 +52,7 @@ static inline int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
> return -EAGAIN;
> }
> static inline void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local,
> - struct sta_info *sta, u16 tid,
> - u8 requeue)
> -{
> -}
> -static inline void ieee80211_requeue(struct ieee80211_local *local, int queue)
> -{
> -}
> -static inline int ieee80211_wme_register(void)
> -{
> - return 0;
> -}
> -static inline void ieee80211_wme_unregister(void)
> + struct sta_info *sta, u16 tid)
> {
> }
> #endif /* CONFIG_NET_SCHED */
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