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wil6210: ADDBA/DELBA flows

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Introduce BACK establishment procedures; decision logic is not implemented
yet; debugfs entry 'addba' used to manually trigger addba/delba for ringid 0.

debugfs usage:
to establish BACK with agg_wsize 16:
  echo 16 > /sys/kernel/debug/ieee80211/phy0/wil6210/addba
to delete BACK:
  echo 0 > /sys/kernel/debug/ieee80211/phy0/wil6210/addba
to change agg_wsize, one need to delete BACK and establish it anew

ADDBA flow for:

- originator

Tx side (initiator) sends WMI_VRING_BA_EN_CMDID providing
agg_wsize and timeout parameters.
Eventually, it gets event confirming BACK agreement - WMI_BA_STATUS_EVENTID
with negotiated parameters. On this event, update Tx vring data
(struct vring_tx_data) and display BACK parameters on debugfs

- recipient

Rx side (recipient) firmware informs driver about ADDBA with
WMI_RCP_ADDBA_REQ_EVENTID, driver process it in service work
queue wq_service. It adjusts parameters and sends response
with WMI_RCP_ADDBA_RESP_CMDID, and final confirmation provided
by firmware with WMI_ADDBA_RESP_SENT_EVENTID. In case of success,
driver updates Rx BACK reorder buffer.

policy for BACK parameters:
- aggregation size (agg_wsize * MPDUsize)) to not exceed 64Kbytes

DELBA flow for:

- originator

driver decides to terminate BACK, it sends WMI_VRING_BA_DIS_CMDID
and updates struct vring_tx_data associated with vring; ignore
WMI_DELBA_EVENTID.

- recipient

firmware informs driver with WMI_DELBA_EVENTID,
driver deletes correspondent reorder buffer

ADDBA request processing requires sending WMI command, therefore
it is processed in work queue context. Same work queue used as for
connect, it get renamed to wq_service

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Vladimir Kondratiev
2014-12-23 09:47:03 +02:00
committed by Kalle Valo
parent ede6a5e7b8
commit 3277213feb
6 changed files with 377 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

161
drivers/net/wireless/ath/wil6210/wmi.c
View File

@@ -471,7 +471,7 @@ static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
wil->sta[evt->cid].status = wil_sta_conn_pending;
wil->pending_connect_cid = evt->cid;
queue_work(wil->wmi_wq_conn, &wil->connect_worker);
queue_work(wil->wq_service, &wil->connect_worker);
}
static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
@@ -583,10 +583,7 @@ static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
int len)
{
struct wmi_vring_ba_status_event *evt = d;
struct wil_sta_info *sta;
uint i, cid;
/* TODO: use Rx BA status, not Tx one */
struct vring_tx_data *txdata;
wil_dbg_wmi(wil, "BACK[%d] %s {%d} timeout %d\n",
evt->ringid,
@@ -598,40 +595,71 @@ static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
return;
}
mutex_lock(&wil->mutex);
if (evt->status != WMI_BA_AGREED) {
evt->ba_timeout = 0;
evt->agg_wsize = 0;
}
cid = wil->vring2cid_tid[evt->ringid][0];
if (cid >= WIL6210_MAX_CID) {
wil_err(wil, "invalid CID %d for vring %d\n", cid, evt->ringid);
goto out;
txdata = &wil->vring_tx_data[evt->ringid];
txdata->agg_timeout = le16_to_cpu(evt->ba_timeout);
txdata->agg_wsize = evt->agg_wsize;
}
static void wmi_evt_addba_rx_req(struct wil6210_priv *wil, int id, void *d,
int len)
{
struct wmi_rcp_addba_req_event *evt = d;
wil_addba_rx_request(wil, evt->cidxtid, evt->dialog_token,
evt->ba_param_set, evt->ba_timeout,
evt->ba_seq_ctrl);
}
static void wmi_evt_delba(struct wil6210_priv *wil, int id, void *d, int len)
{
struct wmi_delba_event *evt = d;
u8 cid, tid;
u16 reason = __le16_to_cpu(evt->reason);
struct wil_sta_info *sta;
struct wil_tid_ampdu_rx *r;
unsigned long flags;
parse_cidxtid(evt->cidxtid, &cid, &tid);
wil_dbg_wmi(wil, "DELBA CID %d TID %d from %s reason %d\n",
cid, tid,
evt->from_initiator ? "originator" : "recipient",
reason);
if (!evt->from_initiator) {
int i;
/* find Tx vring it belongs to */
for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) {
if ((wil->vring2cid_tid[i][0] == cid) &&
(wil->vring2cid_tid[i][1] == tid)) {
struct vring_tx_data *txdata =
&wil->vring_tx_data[i];
wil_dbg_wmi(wil, "DELBA Tx vring %d\n", i);
txdata->agg_timeout = 0;
txdata->agg_wsize = 0;
break; /* max. 1 matching ring */
}
}
if (i >= ARRAY_SIZE(wil->vring2cid_tid))
wil_err(wil, "DELBA: unable to find Tx vring\n");
return;
}
sta = &wil->sta[cid];
if (sta->status == wil_sta_unused) {
wil_err(wil, "CID %d unused\n", cid);
goto out;
}
wil_dbg_wmi(wil, "BACK for CID %d %pM\n", cid, sta->addr);
for (i = 0; i < WIL_STA_TID_NUM; i++) {
struct wil_tid_ampdu_rx *r;
unsigned long flags;
spin_lock_irqsave(&sta->tid_rx_lock, flags);
spin_lock_irqsave(&sta->tid_rx_lock, flags);
r = sta->tid_rx[tid];
sta->tid_rx[tid] = NULL;
wil_tid_ampdu_rx_free(wil, r);
r = sta->tid_rx[i];
sta->tid_rx[i] = NULL;
wil_tid_ampdu_rx_free(wil, r);
spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
if ((evt->status == WMI_BA_AGREED) && evt->agg_wsize)
sta->tid_rx[i] = wil_tid_ampdu_rx_alloc(wil,
evt->agg_wsize, 0);
}
out:
mutex_unlock(&wil->mutex);
spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
}
static const struct {
@@ -649,6 +677,8 @@ static const struct {
{WMI_DATA_PORT_OPEN_EVENTID, wmi_evt_linkup},
{WMI_WBE_LINKDOWN_EVENTID, wmi_evt_linkdown},
{WMI_BA_STATUS_EVENTID, wmi_evt_ba_status},
{WMI_RCP_ADDBA_REQ_EVENTID, wmi_evt_addba_rx_req},
{WMI_DELBA_EVENTID, wmi_evt_delba},
};
/*
@@ -1111,6 +1141,73 @@ int wmi_disconnect_sta(struct wil6210_priv *wil, const u8 *mac, u16 reason)
return wmi_send(wil, WMI_DISCONNECT_STA_CMDID, &cmd, sizeof(cmd));
}
int wmi_addba(struct wil6210_priv *wil, u8 ringid, u8 size, u16 timeout)
{
struct wmi_vring_ba_en_cmd cmd = {
.ringid = ringid,
.agg_max_wsize = size,
.ba_timeout = cpu_to_le16(timeout),
};
wil_dbg_wmi(wil, "%s(ring %d size %d timeout %d)\n", __func__,
ringid, size, timeout);
return wmi_send(wil, WMI_VRING_BA_EN_CMDID, &cmd, sizeof(cmd));
}
int wmi_delba(struct wil6210_priv *wil, u8 ringid, u16 reason)
{
struct wmi_vring_ba_dis_cmd cmd = {
.ringid = ringid,
.reason = cpu_to_le16(reason),
};
wil_dbg_wmi(wil, "%s(ring %d reason %d)\n", __func__,
ringid, reason);
return wmi_send(wil, WMI_VRING_BA_DIS_CMDID, &cmd, sizeof(cmd));
}
int wmi_addba_rx_resp(struct wil6210_priv *wil, u8 cid, u8 tid, u8 token,
u16 status, bool amsdu, u16 agg_wsize, u16 timeout)
{
int rc;
struct wmi_rcp_addba_resp_cmd cmd = {
.cidxtid = mk_cidxtid(cid, tid),
.dialog_token = token,
.status_code = cpu_to_le16(status),
/* bit 0: A-MSDU supported
* bit 1: policy (should be 0 for us)
* bits 2..5: TID
* bits 6..15: buffer size
*/
.ba_param_set = cpu_to_le16((amsdu ? 1 : 0) | (tid << 2) |
(agg_wsize << 6)),
.ba_timeout = cpu_to_le16(timeout),
};
struct {
struct wil6210_mbox_hdr_wmi wmi;
struct wmi_rcp_addba_resp_sent_event evt;
} __packed reply;
wil_dbg_wmi(wil,
"ADDBA response for CID %d TID %d size %d timeout %d status %d AMSDU%s\n",
cid, tid, agg_wsize, timeout, status, amsdu ? "+" : "-");
rc = wmi_call(wil, WMI_RCP_ADDBA_RESP_CMDID, &cmd, sizeof(cmd),
WMI_ADDBA_RESP_SENT_EVENTID, &reply, sizeof(reply), 100);
if (rc)
return rc;
if (reply.evt.status) {
wil_err(wil, "ADDBA response failed with status %d\n",
le16_to_cpu(reply.evt.status));
rc = -EINVAL;
}
return rc;
}
void wmi_event_flush(struct wil6210_priv *wil)
{
struct pending_wmi_event *evt, *t;