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-rw-r--r--include/net/mac80211.h14
-rw-r--r--net/mac80211/debugfs.c2
-rw-r--r--net/mac80211/rate.c12
-rw-r--r--net/mac80211/rate.h9
-rw-r--r--net/mac80211/sta_info.c29
-rw-r--r--net/mac80211/tx.c3
6 files changed, 56 insertions, 13 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 4af0ffb98aaf..f34f4ca7016c 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -855,6 +855,19 @@ enum ieee80211_tkip_key_type {
* any particular flags. There are some exceptions to this rule,
* however, so you are advised to review these flags carefully.
*
+ * @IEEE80211_HW_HAS_RATE_CONTROL:
+ * The hardware or firmware includes rate control, and cannot be
+ * controlled by the stack. As such, no rate control algorithm
+ * should be instantiated, and the TX rate reported to userspace
+ * will be taken from the TX status instead of the rate control
+ * algorithm.
+ * Note that this requires that the driver implement a number of
+ * callbacks so it has the correct information, it needs to have
+ * the @set_rts_threshold callback and must look at the BSS config
+ * @use_cts_prot for G/N protection, @use_short_slot for slot
+ * timing in 2.4 GHz and @use_short_preamble for preambles for
+ * CCK frames.
+ *
* @IEEE80211_HW_RX_INCLUDES_FCS:
* Indicates that received frames passed to the stack include
* the FCS at the end.
@@ -913,6 +926,7 @@ enum ieee80211_tkip_key_type {
* avoid waking up cpu.
*/
enum ieee80211_hw_flags {
+ IEEE80211_HW_HAS_RATE_CONTROL = 1<<0,
IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2,
IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3,
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 82c807723b6f..e4b54093d41b 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -52,7 +52,7 @@ DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
local->wep_iv & 0xffffff);
DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
- local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
+ local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
static ssize_t tsf_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index ccda7454fb17..b9007f80cb92 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -284,9 +284,16 @@ int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
struct rate_control_ref *ref, *old;
ASSERT_RTNL();
+
if (local->open_count)
return -EBUSY;
+ if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) {
+ if (WARN_ON(!local->ops->set_rts_threshold))
+ return -EINVAL;
+ return 0;
+ }
+
ref = rate_control_alloc(name, local);
if (!ref) {
printk(KERN_WARNING "%s: Failed to select rate control "
@@ -305,7 +312,6 @@ int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
"algorithm '%s'\n", wiphy_name(local->hw.wiphy),
ref->ops->name);
-
return 0;
}
@@ -314,6 +320,10 @@ void rate_control_deinitialize(struct ieee80211_local *local)
struct rate_control_ref *ref;
ref = local->rate_ctrl;
+
+ if (!ref)
+ return;
+
local->rate_ctrl = NULL;
rate_control_put(ref);
}
diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h
index 2ab5ad9e71ce..cb9bd1f65e27 100644
--- a/net/mac80211/rate.h
+++ b/net/mac80211/rate.h
@@ -59,6 +59,9 @@ static inline void rate_control_rate_init(struct sta_info *sta)
void *priv_sta = sta->rate_ctrl_priv;
struct ieee80211_supported_band *sband;
+ if (!ref)
+ return;
+
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
@@ -72,7 +75,7 @@ static inline void rate_control_rate_update(struct ieee80211_local *local,
struct ieee80211_sta *ista = &sta->sta;
void *priv_sta = sta->rate_ctrl_priv;
- if (ref->ops->rate_update)
+ if (ref && ref->ops->rate_update)
ref->ops->rate_update(ref->priv, sband, ista,
priv_sta, changed);
}
@@ -97,7 +100,7 @@ static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
{
#ifdef CONFIG_MAC80211_DEBUGFS
struct rate_control_ref *ref = sta->rate_ctrl;
- if (sta->debugfs.dir && ref->ops->add_sta_debugfs)
+ if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
sta->debugfs.dir);
#endif
@@ -107,7 +110,7 @@ static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
{
#ifdef CONFIG_MAC80211_DEBUGFS
struct rate_control_ref *ref = sta->rate_ctrl;
- if (ref->ops->remove_sta_debugfs)
+ if (ref && ref->ops->remove_sta_debugfs)
ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
#endif
}
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index aa017a56afc8..71f370dd24bc 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -148,8 +148,10 @@ struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
static void __sta_info_free(struct ieee80211_local *local,
struct sta_info *sta)
{
- rate_control_free_sta(sta);
- rate_control_put(sta->rate_ctrl);
+ if (sta->rate_ctrl) {
+ rate_control_free_sta(sta);
+ rate_control_put(sta->rate_ctrl);
+ }
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
printk(KERN_DEBUG "%s: Destroyed STA %pM\n",
@@ -277,6 +279,23 @@ static void sta_unblock(struct work_struct *wk)
ieee80211_sta_ps_deliver_poll_response(sta);
}
+static int sta_prepare_rate_control(struct ieee80211_local *local,
+ struct sta_info *sta, gfp_t gfp)
+{
+ if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
+ return 0;
+
+ sta->rate_ctrl = rate_control_get(local->rate_ctrl);
+ sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
+ &sta->sta, gfp);
+ if (!sta->rate_ctrl_priv) {
+ rate_control_put(sta->rate_ctrl);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
u8 *addr, gfp_t gfp)
{
@@ -296,11 +315,7 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
sta->local = local;
sta->sdata = sdata;
- sta->rate_ctrl = rate_control_get(local->rate_ctrl);
- sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
- &sta->sta, gfp);
- if (!sta->rate_ctrl_priv) {
- rate_control_put(sta->rate_ctrl);
+ if (sta_prepare_rate_control(local, sta, gfp)) {
kfree(sta);
return NULL;
}
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 3466e1f7fd12..bd916437e2fb 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1219,7 +1219,8 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
CALL_TXH(ieee80211_tx_h_ps_buf);
CALL_TXH(ieee80211_tx_h_select_key);
CALL_TXH(ieee80211_tx_h_michael_mic_add);
- CALL_TXH(ieee80211_tx_h_rate_ctrl);
+ if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
+ CALL_TXH(ieee80211_tx_h_rate_ctrl);
CALL_TXH(ieee80211_tx_h_misc);
CALL_TXH(ieee80211_tx_h_sequence);
CALL_TXH(ieee80211_tx_h_fragment);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.