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