/*
* Copyright (c) 2010 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "htc.h"
static const char *wmi_cmd_to_name(enum wmi_cmd_id wmi_cmd)
{
switch (wmi_cmd) {
case WMI_ECHO_CMDID:
return "WMI_ECHO_CMDID";
case WMI_ACCESS_MEMORY_CMDID:
return "WMI_ACCESS_MEMORY_CMDID";
case WMI_DISABLE_INTR_CMDID:
return "WMI_DISABLE_INTR_CMDID";
case WMI_ENABLE_INTR_CMDID:
return "WMI_ENABLE_INTR_CMDID";
case WMI_RX_LINK_CMDID:
return "WMI_RX_LINK_CMDID";
case WMI_ATH_INIT_CMDID:
return "WMI_ATH_INIT_CMDID";
case WMI_ABORT_TXQ_CMDID:
return "WMI_ABORT_TXQ_CMDID";
case WMI_STOP_TX_DMA_CMDID:
return "WMI_STOP_TX_DMA_CMDID";
case WMI_STOP_DMA_RECV_CMDID:
return "WMI_STOP_DMA_RECV_CMDID";
case WMI_ABORT_TX_DMA_CMDID:
return "WMI_ABORT_TX_DMA_CMDID";
case WMI_DRAIN_TXQ_CMDID:
return "WMI_DRAIN_TXQ_CMDID";
case WMI_DRAIN_TXQ_ALL_CMDID:
return "WMI_DRAIN_TXQ_ALL_CMDID";
case WMI_START_RECV_CMDID:
return "WMI_START_RECV_CMDID";
case WMI_STOP_RECV_CMDID:
return "WMI_STOP_RECV_CMDID";
case WMI_FLUSH_RECV_CMDID:
return "WMI_FLUSH_RECV_CMDID";
case WMI_SET_MODE_CMDID:
return "WMI_SET_MODE_CMDID";
case WMI_RESET_CMDID:
return "WMI_RESET_CMDID";
case WMI_NODE_CREATE_CMDID:
return "WMI_NODE_CREATE_CMDID";
case WMI_NODE_REMOVE_CMDID:
return "WMI_NODE_REMOVE_CMDID";
case WMI_VAP_REMOVE_CMDID:
return "WMI_VAP_REMOVE_CMDID";
case WMI_VAP_CREATE_CMDID:
return "WMI_VAP_CREATE_CMDID";
case WMI_BEACON_UPDATE_CMDID:
return "WMI_BEACON_UPDATE_CMDID";
case WMI_REG_READ_CMDID:
return "WMI_REG_READ_CMDID";
case WMI_REG_WRITE_CMDID:
return "WMI_REG_WRITE_CMDID";
case WMI_RC_STATE_CHANGE_CMDID:
return "WMI_RC_STATE_CHANGE_CMDID";
case WMI_RC_RATE_UPDATE_CMDID:
return "WMI_RC_RATE_UPDATE_CMDID";
case WMI_DEBUG_INFO_CMDID:
return "WMI_DEBUG_INFO_CMDID";
case WMI_HOST_ATTACH:
return "WMI_HOST_ATTACH";
case WMI_TARGET_IC_UPDATE_CMDID:
return "WMI_TARGET_IC_UPDATE_CMDID";
case WMI_TGT_STATS_CMDID:
return "WMI_TGT_STATS_CMDID";
case WMI_TX_AGGR_ENABLE_CMDID:
return "WMI_TX_AGGR_ENABLE_CMDID";
case WMI_TGT_DETACH_CMDID:
return "WMI_TGT_DETACH_CMDID";
case WMI_TGT_TXQ_ENABLE_CMDID:
return "WMI_TGT_TXQ_ENABLE_CMDID";
case WMI_AGGR_LIMIT_CMD:
return "WMI_AGGR_LIMIT_CMD";
}
return "Bogus";
}
struct wmi *ath9k_init_wmi(struct ath9k_htc_priv *priv)
{
struct wmi *wmi;
wmi = kzalloc(sizeof(struct wmi), GFP_KERNEL);
if (!wmi)
return NULL;
wmi->drv_priv = priv;
wmi->stopped = false;
mutex_init(&wmi->op_mutex);
mutex_init(&wmi->multi_write_mutex);
init_completion(&wmi->cmd_wait);
return wmi;
}
void ath9k_deinit_wmi(struct ath9k_htc_priv *priv)
{
struct wmi *wmi = priv->wmi;
mutex_lock(&wmi->op_mutex);
wmi->stopped = true;
mutex_unlock(&wmi->op_mutex);
kfree(priv->wmi);
}
void ath9k_wmi_tasklet(unsigned long data)
{
struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
struct ath_common *common = ath9k_hw_common(priv->ah);
ath_print(common, ATH_DBG_WMI, "SWBA Event received\n");
ath9k_htc_swba(priv, priv->wmi->beacon_pending);
}
static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb)
{
skb_pull(skb, sizeof(struct wmi_cmd_hdr));
if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);
complete(&wmi->cmd_wait);
}
static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
enum htc_endpoint_id epid)
{
struct wmi *wmi = (struct wmi *) priv;
struct wmi_cmd_hdr *hdr;
u16 cmd_id;
void *wmi_event;
#ifdef CONFIG_ATH9K_HTC_DEBUGFS
__be32 txrate;
#endif
if (unlikely(wmi->stopped))
goto free_skb;
hdr = (struct wmi_cmd_hdr *) skb->data;
cmd_id = be16_to_cpu(hdr->command_id);
if (cmd_id & 0x1000) {
wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));
switch (cmd_id) {
case WMI_SWBA_EVENTID:
wmi->beacon_pending = *(u8 *)wmi_event;
tasklet_schedule(&wmi->drv_priv->wmi_tasklet);
break;
case WMI_TXRATE_EVENTID:
#ifdef CONFIG_ATH9K_HTC_DEBUGFS
txrate = ((struct wmi_event_txrate *)wmi_event)->txrate;
wmi->drv_priv->debug.txrate = be32_to_cpu(txrate);
#endif
break;
default:
break;
}
kfree_skb(skb);
return;
}
/* Check if there has been a timeout. */
spin_lock(&wmi->wmi_lock);
if (cmd_id != wmi->last_cmd_id) {
spin_unlock(&wmi->wmi_lock);
goto free_skb;
}
spin_unlock(&wmi->wmi_lock);
/* WMI command response */
ath9k_wmi_rsp_callback(wmi, skb);
free_skb:
kfree_skb(skb);
}
static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
enum htc_endpoint_id epid, bool txok)
{
kfree_skb(skb);
}
int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
enum htc_endpoint_id *wmi_ctrl_epid)
{
struct htc_service_connreq connect;
int ret;
wmi->htc = htc;
memset(&connect, 0, sizeof(connect));
connect.ep_callbacks.priv = wmi;
connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
connect.service_id = WMI_CONTROL_SVC;
ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
if (ret)
return ret;
*wmi_ctrl_epid = wmi->ctrl_epid;
return 0;
}
static int ath9k_wmi_cmd_issue(struct wmi *wmi,
struct sk_buff *skb,
enum wmi_cmd_id cmd, u16 len)
{
struct wmi_cmd_hdr *hdr;
hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
hdr->command_id = cpu_to_be16(cmd);
hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
return htc_send(wmi->htc, skb, wmi->ctrl_epid, NULL);
}
int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
u8 *cmd_buf, u32 cmd_len,
u8 *rsp_buf, u32 rsp_len,
u32 timeout)
{
struct ath_hw *ah = wmi->drv_priv->ah;
struct ath_common *common = ath9k_hw_common(ah);
u16 headroom = sizeof(struct htc_frame_hdr) +
sizeof(struct wmi_cmd_hdr);
struct sk_buff *skb;
u8 *data;
int time_left, ret = 0;
unsigned long flags;
if (wmi->drv_priv->op_flags & OP_UNPLUGGED)
return 0;
skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
skb_reserve(skb, headroom);
if (cmd_len != 0 && cmd_buf != NULL) {
data = (u8 *) skb_put(skb, cmd_len);
memcpy(data, cmd_buf, cmd_len);
}
mutex_lock(&wmi->op_mutex);
/* check if wmi stopped flag is set */
if (unlikely(wmi->stopped)) {
ret = -EPROTO;
goto out;
}
/* record the rsp buffer and length */
wmi->cmd_rsp_buf = rsp_buf;
wmi->cmd_rsp_len = rsp_len;
spin_lock_irqsave(&wmi->wmi_lock, flags);
wmi->last_cmd_id = cmd_id;
spin_unlock_irqrestore(&wmi->wmi_lock, flags);
ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
if (ret)
goto out;
time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
if (!time_left) {
ath_print(common, ATH_DBG_WMI,
"Timeout waiting for WMI command: %s\n",
wmi_cmd_to_name(cmd_id));
mutex_unlock(&wmi->op_mutex);
return -ETIMEDOUT;
}
mutex_unlock(&wmi->op_mutex);
return 0;
out:
ath_print(common, ATH_DBG_WMI,
"WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
mutex_unlock(&wmi->op_mutex);
kfree_skb(skb);
return ret;
}
