by Ron Rindjunsky

[permalink] [raw]

Subject: [RFC PATCH 05/11] mac80211: A-MPDU add debugfs support

This patch adds A-MPDU status report per STA to the debugfs.
Remark:
=======
The option to activate A-MPDU through debugfs is temporary, only
until A-MPDU manager will be added to the code, and for RFC purposes.

Signed-off-by: Ron Rindjunsky <[email protected]>
---
net/mac80211/debugfs_sta.c | 116 ++++++++++++++++++++++++++++++++++++++++++++
net/mac80211/sta_info.h | 1 +
2 files changed, 117 insertions(+), 0 deletions(-)

diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 8f5944c..0878146 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -55,6 +55,13 @@ static const struct file_operations sta_ ##name## _ops = { \
.open = mac80211_open_file_generic, \
}

+#define STA_OPS_WR(name) \
+static const struct file_operations sta_ ##name## _ops = { \
+ .read = sta_##name##_read, \
+ .write = sta_##name##_write, \
+ .open = mac80211_open_file_generic, \
+}
+
#define STA_FILE(name, field, format) \
STA_READ_##format(name, field) \
STA_OPS(name)
@@ -191,6 +198,113 @@ static ssize_t sta_wme_tx_queue_read(struct file *file, char __user *userbuf,
STA_OPS(wme_tx_queue);
#endif

+static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ char buf[768], *p = buf;
+ int i;
+ struct sta_info *sta = file->private_data;
+ p += scnprintf(p, sizeof(buf)+buf-p, "Agg state for STA is:\n");
+ p += scnprintf(p, sizeof(buf)+buf-p, " STA next dialog_token is %d \n "
+ "TIDs info is: \n TID :",
+ (sta->ampdu_mlme.dialog_token_allocator + 1));
+ for (i = 0; i < STA_TID_NUM; i++)
+ p += scnprintf(p, sizeof(buf)+buf-p, "%5d", i);
+
+ p += scnprintf(p, sizeof(buf)+buf-p, "\n RX :");
+ for (i = 0; i < STA_TID_NUM; i++)
+ p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
+ sta->ampdu_mlme.tid_rx[i].state);
+
+ p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
+ for (i = 0; i < STA_TID_NUM; i++)
+ p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
+ sta->ampdu_mlme.tid_rx[i].dialog_token);
+
+ p += scnprintf(p, sizeof(buf)+buf-p, "\n TX :");
+ for (i = 0; i < STA_TID_NUM; i++)
+ p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
+ sta->ampdu_mlme.tid_tx[i].state);
+
+ p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
+ for (i = 0; i < STA_TID_NUM; i++)
+ p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
+ sta->ampdu_mlme.tid_tx[i].dialog_token);
+
+ p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
+ for (i = 0; i < STA_TID_NUM; i++)
+ p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
+ sta->ampdu_mlme.tid_tx[i].ssn);
+
+ p += scnprintf(p, sizeof(buf)+buf-p, "\n");
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+}
+
+static ssize_t sta_agg_status_write(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ struct sta_info *sta = file->private_data;
+ struct net_device *dev = sta->dev;
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_hw *hw = &local->hw;
+ u8 *da = sta->addr;
+ static int tid_static_tx[16] = {0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0};
+ static int tid_static_rx[16] = {1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1};
+ char *endp;
+ char buf[32];
+ int buf_size, rs;
+ unsigned int tid_num;
+ char state[4];
+
+ memset(buf, 0x00, sizeof(buf));
+ buf_size = min(count, (sizeof(buf)-1));
+ if (copy_from_user(buf, user_buf, buf_size))
+ return -EFAULT;
+
+ tid_num = simple_strtoul(buf, &endp, 0);
+ if (endp == buf)
+ return -EINVAL;
+
+ if ((tid_num >= 100) && (tid_num <= 115)) {
+ /* toggle Rx aggregation command */
+ tid_num = tid_num - 100;
+ if (tid_static_rx[tid_num] == 1) {
+ strcpy(state, "off ");
+ ieee80211_sta_stop_rx_ba_session(dev, da, tid_num, 0,
+ WLAN_REASON_QSTA_REQUIRE_SETUP);
+ sta->ampdu_mlme.tid_rx[tid_num].buf_size = 0xFF;
+ tid_static_rx[tid_num] = 0;
+ } else {
+ strcpy(state, "on ");
+ sta->ampdu_mlme.tid_rx[tid_num].buf_size = 0x00;
+ tid_static_rx[tid_num] = 1;
+ }
+ printk(KERN_ERR "%s tried switching tid=%u %s\n", __func__,
+ tid_num, state);
+ } else if ((tid_num >= 0) && (tid_num <= 15)) {
+ /* toggle Tx aggregation command */
+ if (tid_static_tx[tid_num] == 0) {
+ strcpy(state, "on ");
+ rs = ieee80211_start_tx_ba_session(hw, da, tid_num);
+ if (rs == 0)
+ tid_static_tx[tid_num] = 1;
+ } else {
+ strcpy(state, "off");
+ rs = ieee80211_stop_tx_ba_session(hw, da, tid_num, 1);
+ if (rs == 0)
+ tid_static_tx[tid_num] = 0;
+ }
+ printk(KERN_ERR "%s tried switching tid=%u %s, return=%d\n",
+ __func__, tid_num, state, rs);
+ }
+
+ return count;
+}
+STA_OPS_WR(agg_status);
+
#define DEBUGFS_ADD(name) \
sta->debugfs.name = debugfs_create_file(#name, 0444, \
sta->debugfs.dir, sta, &sta_ ##name## _ops);
@@ -224,6 +338,7 @@ void ieee80211_sta_debugfs_add(struct sta_info *sta)
DEBUGFS_ADD(wme_rx_queue);
DEBUGFS_ADD(wme_tx_queue);
#endif
+ DEBUGFS_ADD(agg_status);
}

void ieee80211_sta_debugfs_remove(struct sta_info *sta)
@@ -238,6 +353,7 @@ void ieee80211_sta_debugfs_remove(struct sta_info *sta)
DEBUGFS_DEL(wme_rx_queue);
DEBUGFS_DEL(wme_tx_queue);
#endif
+ DEBUGFS_DEL(agg_status);

debugfs_remove(sta->debugfs.dir);
sta->debugfs.dir = NULL;
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 48f25f2..1e4410f 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -190,6 +190,7 @@ struct sta_info {
struct dentry *wme_rx_queue;
struct dentry *wme_tx_queue;
#endif
+ struct dentry *agg_status;
} debugfs;
#endif
};
--
1.5.3.3

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