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-rw-r--r--include/net/mac80211.h14
-rw-r--r--net/mac80211/ieee80211_i.h5
-rw-r--r--net/mac80211/tx.c109
3 files changed, 126 insertions, 2 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index a8683aec6dbe..a52009ffc19f 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -21,6 +21,7 @@
#include <linux/skbuff.h>
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
+#include <net/codel.h>
#include <asm/unaligned.h>
/**
@@ -895,7 +896,18 @@ struct ieee80211_tx_info {
unsigned long jiffies;
};
/* NB: vif can be NULL for injected frames */
- struct ieee80211_vif *vif;
+ union {
+ /* NB: vif can be NULL for injected frames */
+ struct ieee80211_vif *vif;
+
+ /* When packets are enqueued on txq it's easy
+ * to re-construct the vif pointer. There's no
+ * more space in tx_info so it can be used to
+ * store the necessary enqueue time for packet
+ * sojourn time computation.
+ */
+ codel_time_t enqueue_time;
+ };
struct ieee80211_key_conf *hw_key;
u32 flags;
/* 4 bytes free */
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 6f8375f1df88..54edfb6fc1d1 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -812,10 +812,12 @@ enum txq_info_flags {
* @tin: contains packets split into multiple flows
* @def_flow: used as a fallback flow when a packet destined to @tin hashes to
* a fq_flow which is already owned by a different tin
+ * @def_cvars: codel vars for @def_flow
*/
struct txq_info {
struct fq_tin tin;
struct fq_flow def_flow;
+ struct codel_vars def_cvars;
unsigned long flags;
/* keep last! */
@@ -1108,6 +1110,9 @@ struct ieee80211_local {
struct ieee80211_hw hw;
struct fq fq;
+ struct codel_vars *cvars;
+ struct codel_params cparams;
+ struct codel_stats cstats;
const struct ieee80211_ops *ops;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 1d8343fca6d4..44ec605a5682 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -24,6 +24,8 @@
#include <net/ieee80211_radiotap.h>
#include <net/cfg80211.h>
#include <net/mac80211.h>
+#include <net/codel.h>
+#include <net/codel_impl.h>
#include <asm/unaligned.h>
#include <net/fq_impl.h>
@@ -1267,11 +1269,92 @@ static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
return to_txq_info(txq);
}
+static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
+{
+ IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
+}
+
+static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
+{
+ IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
+}
+
+static u32 codel_skb_len_func(const struct sk_buff *skb)
+{
+ return skb->len;
+}
+
+static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
+{
+ const struct ieee80211_tx_info *info;
+
+ info = (const struct ieee80211_tx_info *)skb->cb;
+ return info->control.enqueue_time;
+}
+
+static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
+ void *ctx)
+{
+ struct ieee80211_local *local;
+ struct txq_info *txqi;
+ struct fq *fq;
+ struct fq_flow *flow;
+
+ txqi = ctx;
+ local = vif_to_sdata(txqi->txq.vif)->local;
+ fq = &local->fq;
+
+ if (cvars == &txqi->def_cvars)
+ flow = &txqi->def_flow;
+ else
+ flow = &fq->flows[cvars - local->cvars];
+
+ return fq_flow_dequeue(fq, flow);
+}
+
+static void codel_drop_func(struct sk_buff *skb,
+ void *ctx)
+{
+ struct ieee80211_local *local;
+ struct ieee80211_hw *hw;
+ struct txq_info *txqi;
+
+ txqi = ctx;
+ local = vif_to_sdata(txqi->txq.vif)->local;
+ hw = &local->hw;
+
+ ieee80211_free_txskb(hw, skb);
+}
+
static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
struct fq_tin *tin,
struct fq_flow *flow)
{
- return fq_flow_dequeue(fq, flow);
+ struct ieee80211_local *local;
+ struct txq_info *txqi;
+ struct codel_vars *cvars;
+ struct codel_params *cparams;
+ struct codel_stats *cstats;
+
+ local = container_of(fq, struct ieee80211_local, fq);
+ txqi = container_of(tin, struct txq_info, tin);
+ cparams = &local->cparams;
+ cstats = &local->cstats;
+
+ if (flow == &txqi->def_flow)
+ cvars = &txqi->def_cvars;
+ else
+ cvars = &local->cvars[flow - fq->flows];
+
+ return codel_dequeue(txqi,
+ &flow->backlog,
+ cparams,
+ cvars,
+ cstats,
+ codel_skb_len_func,
+ codel_skb_time_func,
+ codel_drop_func,
+ codel_dequeue_func);
}
static void fq_skb_free_func(struct fq *fq,
@@ -1303,6 +1386,7 @@ static void ieee80211_txq_enqueue(struct ieee80211_local *local,
struct fq *fq = &local->fq;
struct fq_tin *tin = &txqi->tin;
+ ieee80211_set_skb_enqueue_time(skb);
fq_tin_enqueue(fq, tin, skb,
fq_skb_free_func,
fq_flow_get_default_func);
@@ -1314,6 +1398,7 @@ void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
{
fq_tin_init(&txqi->tin);
fq_flow_init(&txqi->def_flow);
+ codel_vars_init(&txqi->def_cvars);
txqi->txq.vif = &sdata->vif;
@@ -1342,6 +1427,7 @@ int ieee80211_txq_setup_flows(struct ieee80211_local *local)
{
struct fq *fq = &local->fq;
int ret;
+ int i;
if (!local->ops->wake_tx_queue)
return 0;
@@ -1350,6 +1436,22 @@ int ieee80211_txq_setup_flows(struct ieee80211_local *local)
if (ret)
return ret;
+ codel_params_init(&local->cparams);
+ codel_stats_init(&local->cstats);
+ local->cparams.interval = MS2TIME(100);
+ local->cparams.target = MS2TIME(20);
+ local->cparams.ecn = true;
+
+ local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
+ GFP_KERNEL);
+ if (!local->cvars) {
+ fq_reset(fq, fq_skb_free_func);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < fq->flows_cnt; i++)
+ codel_vars_init(&local->cvars[i]);
+
return 0;
}
@@ -1360,6 +1462,9 @@ void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
if (!local->ops->wake_tx_queue)
return;
+ kfree(local->cvars);
+ local->cvars = NULL;
+
fq_reset(fq, fq_skb_free_func);
}
@@ -1382,6 +1487,8 @@ struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
if (!skb)
goto out;
+ ieee80211_set_skb_vif(skb, txqi);
+
hdr = (struct ieee80211_hdr *)skb->data;
if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) {
struct sta_info *sta = container_of(txq->sta, struct sta_info,
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-03 05:48:12 +0000