[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / ath / wil6210 / main.c

/*
 * Copyright (c) 2012 Qualcomm Atheros, 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 <linux/moduleparam.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>

#include "wil6210.h"
#include "txrx.h"

static bool no_fw_recovery;
module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");

/*
 * Due to a hardware issue,
 * one has to read/write to/from NIC in 32-bit chunks;
 * regular memcpy_fromio and siblings will
 * not work on 64-bit platform - it uses 64-bit transactions
 *
 * Force 32-bit transactions to enable NIC on 64-bit platforms
 *
 * To avoid byte swap on big endian host, __raw_{read|write}l
 * should be used - {read|write}l would swap bytes to provide
 * little endian on PCI value in host endianness.
 */
void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
			  size_t count)
{
	u32 *d = dst;
	const volatile u32 __iomem *s = src;

	/* size_t is unsigned, if (count%4 != 0) it will wrap */
	for (count += 4; count > 4; count -= 4)
		*d++ = __raw_readl(s++);
}

void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
			size_t count)
{
	volatile u32 __iomem *d = dst;
	const u32 *s = src;

	for (count += 4; count > 4; count -= 4)
		__raw_writel(*s++, d++);
}

static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
{
	uint i;
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;
	struct wil_sta_info *sta = &wil->sta[cid];
	wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
		     sta->status);

	sta->data_port_open = false;
	if (sta->status != wil_sta_unused) {
		wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
		switch (wdev->iftype) {
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_P2P_GO:
			/* AP-like interface */
			cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
			break;
		default:
			break;
		}
		sta->status = wil_sta_unused;
	}

	for (i = 0; i < WIL_STA_TID_NUM; i++) {
		struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
		sta->tid_rx[i] = NULL;
		wil_tid_ampdu_rx_free(wil, r);
	}
	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
		if (wil->vring2cid_tid[i][0] == cid)
			wil_vring_fini_tx(wil, i);
	}
	memset(&sta->stats, 0, sizeof(sta->stats));
}

static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
{
	int cid = -ENOENT;
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;

	might_sleep();
	if (bssid) {
		cid = wil_find_cid(wil, bssid);
		wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
	} else {
		wil_dbg_misc(wil, "%s(all)\n", __func__);
	}

	if (cid >= 0) /* disconnect 1 peer */
		wil_disconnect_cid(wil, cid);
	else /* disconnect all */
		for (cid = 0; cid < WIL6210_MAX_CID; cid++)
			wil_disconnect_cid(wil, cid);

	/* link state */
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_P2P_CLIENT:
		wil_link_off(wil);
		if (test_bit(wil_status_fwconnected, &wil->status)) {
			clear_bit(wil_status_fwconnected, &wil->status);
			cfg80211_disconnected(ndev,
					      WLAN_STATUS_UNSPECIFIED_FAILURE,
					      NULL, 0, GFP_KERNEL);
		} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
			cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
						WLAN_STATUS_UNSPECIFIED_FAILURE,
						GFP_KERNEL);
		}
		clear_bit(wil_status_fwconnecting, &wil->status);
		break;
	default:
		break;
	}
}

static void wil_disconnect_worker(struct work_struct *work)
{
	struct wil6210_priv *wil = container_of(work,
			struct wil6210_priv, disconnect_worker);

	mutex_lock(&wil->mutex);
	_wil6210_disconnect(wil, NULL);
	mutex_unlock(&wil->mutex);
}

static void wil_connect_timer_fn(ulong x)
{
	struct wil6210_priv *wil = (void *)x;

	wil_dbg_misc(wil, "Connect timeout\n");

	/* reschedule to thread context - disconnect won't
	 * run from atomic context
	 */
	schedule_work(&wil->disconnect_worker);
}

static void wil_scan_timer_fn(ulong x)
{
	struct wil6210_priv *wil = (void *)x;

	clear_bit(wil_status_fwready, &wil->status);
	wil_err(wil, "Scan timeout detected, start fw error recovery\n");
	schedule_work(&wil->fw_error_worker);
}

static void wil_fw_error_worker(struct work_struct *work)
{
	struct wil6210_priv *wil = container_of(work,
			struct wil6210_priv, fw_error_worker);
	struct wireless_dev *wdev = wil->wdev;

	wil_dbg_misc(wil, "fw error worker\n");

	if (no_fw_recovery)
		return;

	/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
	 * passed since last recovery attempt
	 */
	if (time_is_after_jiffies(wil->last_fw_recovery +
				  WIL6210_FW_RECOVERY_TO))
		wil->recovery_count++;
	else
		wil->recovery_count = 1; /* fw was alive for a long time */

	if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
		wil_err(wil, "too many recovery attempts (%d), giving up\n",
			wil->recovery_count);
		return;
	}

	wil->last_fw_recovery = jiffies;

	mutex_lock(&wil->mutex);
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_P2P_CLIENT:
	case NL80211_IFTYPE_MONITOR:
		wil_info(wil, "fw error recovery started (try %d)...\n",
			 wil->recovery_count);
		wil_reset(wil);

		/* need to re-allocate Rx ring after reset */
		wil_rx_init(wil);
		break;
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_P2P_GO:
		/* recovery in these modes is done by upper layers */
		break;
	default:
		break;
	}
	mutex_unlock(&wil->mutex);
}

static int wil_find_free_vring(struct wil6210_priv *wil)
{
	int i;
	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
		if (!wil->vring_tx[i].va)
			return i;
	}
	return -EINVAL;
}

static void wil_connect_worker(struct work_struct *work)
{
	int rc;
	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
						connect_worker);
	int cid = wil->pending_connect_cid;
	int ringid = wil_find_free_vring(wil);

	if (cid < 0) {
		wil_err(wil, "No connection pending\n");
		return;
	}

	wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);

	rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
	wil->pending_connect_cid = -1;
	if (rc == 0) {
		wil->sta[cid].status = wil_sta_connected;
		wil_link_on(wil);
	} else {
		wil->sta[cid].status = wil_sta_unused;
	}
}

int wil_priv_init(struct wil6210_priv *wil)
{
	wil_dbg_misc(wil, "%s()\n", __func__);

	memset(wil->sta, 0, sizeof(wil->sta));

	mutex_init(&wil->mutex);
	mutex_init(&wil->wmi_mutex);

	init_completion(&wil->wmi_ready);

	wil->pending_connect_cid = -1;
	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
	setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);

	INIT_WORK(&wil->connect_worker, wil_connect_worker);
	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
	INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);

	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	spin_lock_init(&wil->wmi_ev_lock);

	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
	if (!wil->wmi_wq)
		return -EAGAIN;

	wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
	if (!wil->wmi_wq_conn) {
		destroy_workqueue(wil->wmi_wq);
		return -EAGAIN;
	}

	wil->last_fw_recovery = jiffies;

	return 0;
}

void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
{
	del_timer_sync(&wil->connect_timer);
	_wil6210_disconnect(wil, bssid);
}

void wil_priv_deinit(struct wil6210_priv *wil)
{
	del_timer_sync(&wil->scan_timer);
	cancel_work_sync(&wil->disconnect_worker);
	cancel_work_sync(&wil->fw_error_worker);
	mutex_lock(&wil->mutex);
	wil6210_disconnect(wil, NULL);
	mutex_unlock(&wil->mutex);
	wmi_event_flush(wil);
	destroy_workqueue(wil->wmi_wq_conn);
	destroy_workqueue(wil->wmi_wq);
}

static void wil_target_reset(struct wil6210_priv *wil)
{
	int delay = 0;
	u32 hw_state;
	u32 rev_id;
	bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);

	wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);

	/* register read */
#define R(a) ioread32(wil->csr + HOSTADDR(a))
	/* register write */
#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
	/* register set = read, OR, write */
#define S(a, v) W(a, R(a) | v)
	/* register clear = read, AND with inverted, write */
#define C(a, v) W(a, R(a) & ~v)

	wil->hw_version = R(RGF_USER_FW_REV_ID);
	rev_id = wil->hw_version & 0xff;

	/* Clear MAC link up */
	S(RGF_HP_CTRL, BIT(15));
	/* hpal_perst_from_pad_src_n_mask */
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
	/* car_perst_rst_src_n_mask */
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
	wmb(); /* order is important here */

	if (is_sparrow) {
		W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
		wmb(); /* order is important here */
	}

	W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */
	W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
	wmb(); /* order is important here */

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000B0 : 0x00000170);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
	wmb(); /* order is important here */

	if (is_sparrow) {
		W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
		wmb(); /* order is important here */
	}

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
	wmb(); /* order is important here */

	if (is_sparrow) {
		W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
		/* reset A2 PCIE AHB */
		W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);

	} else {
		W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
		if (rev_id == 1) {
			/* reset A1 BOTH PCIE AHB & PCIE RGF */
			W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
		} else {
			W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
			W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
		}

	}

	/* TODO: check order here!!! Erez code is different */
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
	wmb(); /* order is important here */

	/* wait until device ready */
	do {
		msleep(1);
		hw_state = R(RGF_USER_HW_MACHINE_STATE);
		if (delay++ > 100) {
			wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
				hw_state);
			return;
		}
	} while (hw_state != HW_MACHINE_BOOT_DONE);

	/* TODO: Erez check rev_id != 1 */
	if (!is_sparrow && (rev_id != 1))
		W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));

	C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
	wmb(); /* order is important here */

	wil_dbg_misc(wil, "Reset completed in %d ms\n", delay);

#undef R
#undef W
#undef S
#undef C
}

void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
{
	le32_to_cpus(&r->base);
	le16_to_cpus(&r->entry_size);
	le16_to_cpus(&r->size);
	le32_to_cpus(&r->tail);
	le32_to_cpus(&r->head);
}

static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
{
	ulong to = msecs_to_jiffies(1000);
	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
	if (0 == left) {
		wil_err(wil, "Firmware not ready\n");
		return -ETIME;
	} else {
		wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
			 jiffies_to_msecs(to-left), wil->hw_version);
	}
	return 0;
}

/*
 * We reset all the structures, and we reset the UMAC.
 * After calling this routine, you're expected to reload
 * the firmware.
 */
int wil_reset(struct wil6210_priv *wil)
{
	int rc;

	WARN_ON(!mutex_is_locked(&wil->mutex));

	cancel_work_sync(&wil->disconnect_worker);
	wil6210_disconnect(wil, NULL);

	wil->status = 0; /* prevent NAPI from being scheduled */
	if (test_bit(wil_status_napi_en, &wil->status)) {
		napi_synchronize(&wil->napi_rx);
	}

	if (wil->scan_request) {
		wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
			     wil->scan_request);
		del_timer_sync(&wil->scan_timer);
		cfg80211_scan_done(wil->scan_request, true);
		wil->scan_request = NULL;
	}

	wil6210_disable_irq(wil);

	wmi_event_flush(wil);

	flush_workqueue(wil->wmi_wq_conn);
	flush_workqueue(wil->wmi_wq);

	/* TODO: put MAC in reset */
	wil_target_reset(wil);

	wil_rx_fini(wil);

	/* init after reset */
	wil->pending_connect_cid = -1;
	reinit_completion(&wil->wmi_ready);

	/* TODO: release MAC reset */
	wil6210_enable_irq(wil);

	/* we just started MAC, wait for FW ready */
	rc = wil_wait_for_fw_ready(wil);

	return rc;
}

void wil_fw_error_recovery(struct wil6210_priv *wil)
{
	wil_dbg_misc(wil, "starting fw error recovery\n");
	schedule_work(&wil->fw_error_worker);
}

void wil_link_on(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);

	wil_dbg_misc(wil, "%s()\n", __func__);

	netif_carrier_on(ndev);
	wil_dbg_misc(wil, "netif_tx_wake : link on\n");
	netif_tx_wake_all_queues(ndev);
}

void wil_link_off(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);

	wil_dbg_misc(wil, "%s()\n", __func__);

	netif_tx_stop_all_queues(ndev);
	wil_dbg_misc(wil, "netif_tx_stop : link off\n");
	netif_carrier_off(ndev);
}

static int __wil_up(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;
	int rc;

	WARN_ON(!mutex_is_locked(&wil->mutex));

	rc = wil_reset(wil);
	if (rc)
		return rc;

	/* Rx VRING. After MAC and beacon */
	rc = wil_rx_init(wil);
	if (rc)
		return rc;

	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
		wil_dbg_misc(wil, "type: STATION\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_AP:
		wil_dbg_misc(wil, "type: AP\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_CLIENT:
		wil_dbg_misc(wil, "type: P2P_CLIENT\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_GO:
		wil_dbg_misc(wil, "type: P2P_GO\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_MONITOR:
		wil_dbg_misc(wil, "type: Monitor\n");
		ndev->type = ARPHRD_IEEE80211_RADIOTAP;
		/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
		break;
	default:
		return -EOPNOTSUPP;
	}

	/* MAC address - pre-requisite for other commands */
	wmi_set_mac_address(wil, ndev->dev_addr);


	napi_enable(&wil->napi_rx);
	napi_enable(&wil->napi_tx);
	set_bit(wil_status_napi_en, &wil->status);

	return 0;
}

int wil_up(struct wil6210_priv *wil)
{
	int rc;

	mutex_lock(&wil->mutex);
	rc = __wil_up(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}

static int __wil_down(struct wil6210_priv *wil)
{
	WARN_ON(!mutex_is_locked(&wil->mutex));

	clear_bit(wil_status_napi_en, &wil->status);
	napi_disable(&wil->napi_rx);
	napi_disable(&wil->napi_tx);

	if (wil->scan_request) {
		wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
			     wil->scan_request);
		del_timer_sync(&wil->scan_timer);
		cfg80211_scan_done(wil->scan_request, true);
		wil->scan_request = NULL;
	}

	wil6210_disconnect(wil, NULL);
	wil_rx_fini(wil);

	return 0;
}

int wil_down(struct wil6210_priv *wil)
{
	int rc;

	mutex_lock(&wil->mutex);
	rc = __wil_down(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}

int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
{
	int i;
	int rc = -ENOENT;

	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
		if ((wil->sta[i].status != wil_sta_unused) &&
		    ether_addr_equal(wil->sta[i].addr, mac)) {
			rc = i;
			break;
		}
	}

	return rc;
}
Commit	Line	Data
2be7d22f VK	1	/*
	2	* Copyright (c) 2012 Qualcomm Atheros, Inc.
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
2be7d22f VK	17	#include <linux/moduleparam.h>
2be7d22f VK	18	#include <linux/if_arp.h>
108d1eb6	19	#include <linux/etherdevice.h>
2be7d22f VK	20
2be7d22f VK	21	#include "wil6210.h"
b4490f42	22	#include "txrx.h"
2be7d22f	23
ed6f9dc6 VK	24	static bool no_fw_recovery;
	25	module_param(no_fw_recovery, bool, S_IRUGO \| S_IWUSR);
	26	MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");
	27
2be7d22f VK	28	/*
	29	* Due to a hardware issue,
	30	* one has to read/write to/from NIC in 32-bit chunks;
	31	* regular memcpy_fromio and siblings will
	32	* not work on 64-bit platform - it uses 64-bit transactions
	33	*
	34	* Force 32-bit transactions to enable NIC on 64-bit platforms
	35	*
	36	* To avoid byte swap on big endian host, __raw_{read\|write}l
	37	* should be used - {read\|write}l would swap bytes to provide
	38	* little endian on PCI value in host endianness.
	39	*/
	40	void wil_memcpy_fromio_32(void dst, const volatile void __iomem src,
	41	size_t count)
	42	{
	43	u32 *d = dst;
	44	const volatile u32 __iomem *s = src;
	45
	46	/* size_t is unsigned, if (count%4 != 0) it will wrap */
	47	for (count += 4; count > 4; count -= 4)
	48	*d++ = __raw_readl(s++);
	49	}
	50
	51	void wil_memcpy_toio_32(volatile void __iomem dst, const void src,
	52	size_t count)
	53	{
	54	volatile u32 __iomem *d = dst;
	55	const u32 *s = src;
	56
	57	for (count += 4; count > 4; count -= 4)
	58	__raw_writel(*s++, d++);
	59	}
	60
91886b0b VK	61	static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
	62	{
	63	uint i;
fc58f681 VK	64	struct net_device *ndev = wil_to_ndev(wil);
fc58f681 VK	65	struct wireless_dev *wdev = wil->wdev;
91886b0b	66	struct wil_sta_info *sta = &wil->sta[cid];
fc58f681 VK	67	wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
fc58f681 VK	68	sta->status);
4d55a0a1	69
e58c9f70	70	sta->data_port_open = false;
4d55a0a1 VK	71	if (sta->status != wil_sta_unused) {
4d55a0a1 VK	72	wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
fc58f681 VK	73	switch (wdev->iftype) {
	74	case NL80211_IFTYPE_AP:
	75	case NL80211_IFTYPE_P2P_GO:
	76	/* AP-like interface */
	77	cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
	78	break;
	79	default:
	80	break;
	81	}
4d55a0a1 VK	82	sta->status = wil_sta_unused;
	83	}
	84
91886b0b VK	85	for (i = 0; i < WIL_STA_TID_NUM; i++) {
	86	struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
	87	sta->tid_rx[i] = NULL;
	88	wil_tid_ampdu_rx_free(wil, r);
	89	}
	90	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
	91	if (wil->vring2cid_tid[i][0] == cid)
	92	wil_vring_fini_tx(wil, i);
	93	}
	94	memset(&sta->stats, 0, sizeof(sta->stats));
	95	}
	96
3b3a0162	97	static void _wil6210_disconnect(struct wil6210_priv wil, const u8 bssid)
2be7d22f	98	{
91886b0b	99	int cid = -ENOENT;
2be7d22f	100	struct net_device *ndev = wil_to_ndev(wil);
91886b0b VK	101	struct wireless_dev *wdev = wil->wdev;
	102
	103	might_sleep();
	104	if (bssid) {
	105	cid = wil_find_cid(wil, bssid);
	106	wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
	107	} else {
	108	wil_dbg_misc(wil, "%s(all)\n", __func__);
b4490f42 VK	109	}
b4490f42 VK	110
91886b0b VK	111	if (cid >= 0) /* disconnect 1 peer */
	112	wil_disconnect_cid(wil, cid);
	113	else /* disconnect all */
	114	for (cid = 0; cid < WIL6210_MAX_CID; cid++)
	115	wil_disconnect_cid(wil, cid);
	116
	117	/* link state */
	118	switch (wdev->iftype) {
	119	case NL80211_IFTYPE_STATION:
	120	case NL80211_IFTYPE_P2P_CLIENT:
	121	wil_link_off(wil);
	122	if (test_bit(wil_status_fwconnected, &wil->status)) {
	123	clear_bit(wil_status_fwconnected, &wil->status);
	124	cfg80211_disconnected(ndev,
	125	WLAN_STATUS_UNSPECIFIED_FAILURE,
	126	NULL, 0, GFP_KERNEL);
	127	} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
	128	cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
	129	WLAN_STATUS_UNSPECIFIED_FAILURE,
	130	GFP_KERNEL);
	131	}
	132	clear_bit(wil_status_fwconnecting, &wil->status);
91886b0b VK	133	break;
91886b0b VK	134	default:
91886b0b	135	break;
2be7d22f	136	}
2be7d22f VK	137	}
	138
	139	static void wil_disconnect_worker(struct work_struct *work)
	140	{
	141	struct wil6210_priv *wil = container_of(work,
	142	struct wil6210_priv, disconnect_worker);
	143
097638a0	144	mutex_lock(&wil->mutex);
2be7d22f	145	_wil6210_disconnect(wil, NULL);
097638a0	146	mutex_unlock(&wil->mutex);
2be7d22f VK	147	}
	148
	149	static void wil_connect_timer_fn(ulong x)
	150	{
	151	struct wil6210_priv wil = (void )x;
	152
7743882d	153	wil_dbg_misc(wil, "Connect timeout\n");
2be7d22f VK	154
	155	/* reschedule to thread context - disconnect won't
	156	* run from atomic context
	157	*/
	158	schedule_work(&wil->disconnect_worker);
	159	}
	160
047e5d74 VK	161	static void wil_scan_timer_fn(ulong x)
	162	{
	163	struct wil6210_priv wil = (void )x;
	164
	165	clear_bit(wil_status_fwready, &wil->status);
	166	wil_err(wil, "Scan timeout detected, start fw error recovery\n");
	167	schedule_work(&wil->fw_error_worker);
	168	}
	169
ed6f9dc6 VK	170	static void wil_fw_error_worker(struct work_struct *work)
	171	{
	172	struct wil6210_priv *wil = container_of(work,
	173	struct wil6210_priv, fw_error_worker);
	174	struct wireless_dev *wdev = wil->wdev;
	175
	176	wil_dbg_misc(wil, "fw error worker\n");
	177
	178	if (no_fw_recovery)
	179	return;
	180
fc219eed VK	181	/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
	182	* passed since last recovery attempt
	183	*/
	184	if (time_is_after_jiffies(wil->last_fw_recovery +
	185	WIL6210_FW_RECOVERY_TO))
	186	wil->recovery_count++;
	187	else
	188	wil->recovery_count = 1; /* fw was alive for a long time */
	189
	190	if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
	191	wil_err(wil, "too many recovery attempts (%d), giving up\n",
	192	wil->recovery_count);
	193	return;
	194	}
	195
	196	wil->last_fw_recovery = jiffies;
	197
9c3bde56	198	mutex_lock(&wil->mutex);
ed6f9dc6 VK	199	switch (wdev->iftype) {
	200	case NL80211_IFTYPE_STATION:
	201	case NL80211_IFTYPE_P2P_CLIENT:
	202	case NL80211_IFTYPE_MONITOR:
fc219eed VK	203	wil_info(wil, "fw error recovery started (try %d)...\n",
fc219eed VK	204	wil->recovery_count);
ed6f9dc6 VK	205	wil_reset(wil);
	206
	207	/* need to re-allocate Rx ring after reset */
	208	wil_rx_init(wil);
	209	break;
	210	case NL80211_IFTYPE_AP:
	211	case NL80211_IFTYPE_P2P_GO:
	212	/* recovery in these modes is done by upper layers */
	213	break;
	214	default:
	215	break;
	216	}
9c3bde56	217	mutex_unlock(&wil->mutex);
ed6f9dc6 VK	218	}
ed6f9dc6 VK	219
9a177384 VK	220	static int wil_find_free_vring(struct wil6210_priv *wil)
	221	{
	222	int i;
	223	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
	224	if (!wil->vring_tx[i].va)
	225	return i;
	226	}
	227	return -EINVAL;
	228	}
	229
d81079f1 VK	230	static void wil_connect_worker(struct work_struct *work)
	231	{
	232	int rc;
	233	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
	234	connect_worker);
	235	int cid = wil->pending_connect_cid;
9a177384	236	int ringid = wil_find_free_vring(wil);
d81079f1 VK	237
	238	if (cid < 0) {
	239	wil_err(wil, "No connection pending\n");
	240	return;
	241	}
	242
	243	wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
	244
9a177384	245	rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
d81079f1	246	wil->pending_connect_cid = -1;
3df2cd36 VK	247	if (rc == 0) {
3df2cd36 VK	248	wil->sta[cid].status = wil_sta_connected;
d81079f1	249	wil_link_on(wil);
3df2cd36 VK	250	} else {
	251	wil->sta[cid].status = wil_sta_unused;
	252	}
d81079f1 VK	253	}
d81079f1 VK	254
2be7d22f VK	255	int wil_priv_init(struct wil6210_priv *wil)
2be7d22f VK	256	{
7743882d	257	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f	258
3df2cd36 VK	259	memset(wil->sta, 0, sizeof(wil->sta));
3df2cd36 VK	260
2be7d22f VK	261	mutex_init(&wil->mutex);
	262	mutex_init(&wil->wmi_mutex);
	263
	264	init_completion(&wil->wmi_ready);
	265
	266	wil->pending_connect_cid = -1;
	267	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
047e5d74	268	setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
2be7d22f	269
d81079f1	270	INIT_WORK(&wil->connect_worker, wil_connect_worker);
2be7d22f VK	271	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
2be7d22f VK	272	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
ed6f9dc6	273	INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
2be7d22f VK	274
	275	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	276	spin_lock_init(&wil->wmi_ev_lock);
	277
	278	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
	279	if (!wil->wmi_wq)
	280	return -EAGAIN;
	281
	282	wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
	283	if (!wil->wmi_wq_conn) {
	284	destroy_workqueue(wil->wmi_wq);
	285	return -EAGAIN;
	286	}
	287
fc219eed VK	288	wil->last_fw_recovery = jiffies;
fc219eed VK	289
2be7d22f VK	290	return 0;
	291	}
	292
3b3a0162	293	void wil6210_disconnect(struct wil6210_priv wil, const u8 bssid)
2be7d22f VK	294	{
	295	del_timer_sync(&wil->connect_timer);
	296	_wil6210_disconnect(wil, bssid);
	297	}
	298
	299	void wil_priv_deinit(struct wil6210_priv *wil)
	300	{
047e5d74	301	del_timer_sync(&wil->scan_timer);
2be7d22f	302	cancel_work_sync(&wil->disconnect_worker);
ed6f9dc6	303	cancel_work_sync(&wil->fw_error_worker);
097638a0	304	mutex_lock(&wil->mutex);
2be7d22f	305	wil6210_disconnect(wil, NULL);
097638a0	306	mutex_unlock(&wil->mutex);
2be7d22f VK	307	wmi_event_flush(wil);
	308	destroy_workqueue(wil->wmi_wq_conn);
	309	destroy_workqueue(wil->wmi_wq);
	310	}
	311
	312	static void wil_target_reset(struct wil6210_priv *wil)
	313	{
98a65b59	314	int delay = 0;
d28bcc30	315	u32 hw_state;
36b10a72	316	u32 rev_id;
6508281b	317	bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
36b10a72	318
6508281b	319	wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
2be7d22f	320
36b10a72 VK	321	/* register read */
36b10a72 VK	322	#define R(a) ioread32(wil->csr + HOSTADDR(a))
2be7d22f VK	323	/* register write */
	324	#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
	325	/* register set = read, OR, write */
972072aa VK	326	#define S(a, v) W(a, R(a) \| v)
	327	/* register clear = read, AND with inverted, write */
	328	#define C(a, v) W(a, R(a) & ~v)
2be7d22f	329
17123991	330	wil->hw_version = R(RGF_USER_FW_REV_ID);
36b10a72	331	rev_id = wil->hw_version & 0xff;
6508281b VK	332
	333	/* Clear MAC link up */
	334	S(RGF_HP_CTRL, BIT(15));
2be7d22f VK	335	/* hpal_perst_from_pad_src_n_mask */
	336	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
	337	/* car_perst_rst_src_n_mask */
	338	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
260e6951	339	wmb(); /* order is important here */
2be7d22f	340
6508281b VK	341	if (is_sparrow) {
	342	W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
	343	wmb(); /* order is important here */
	344	}
	345
2be7d22f VK	346	W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
2be7d22f VK	347	W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
260e6951	348	wmb(); /* order is important here */
2be7d22f	349
2be7d22f VK	350	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
2be7d22f VK	351	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
6508281b	352	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000B0 : 0x00000170);
2be7d22f	353	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
260e6951	354	wmb(); /* order is important here */
2be7d22f	355
6508281b VK	356	if (is_sparrow) {
	357	W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
	358	wmb(); /* order is important here */
	359	}
	360
2be7d22f VK	361	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	362	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	363	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	364	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
260e6951	365	wmb(); /* order is important here */
2be7d22f	366
6508281b VK	367	if (is_sparrow) {
	368	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
	369	/* reset A2 PCIE AHB */
36b10a72	370	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
6508281b VK	371
	372	} else {
	373	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
	374	if (rev_id == 1) {
	375	/* reset A1 BOTH PCIE AHB & PCIE RGF */
	376	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
	377	} else {
	378	W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) \| BIT(8));
	379	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
	380	}
	381
36b10a72	382	}
6508281b VK	383
6508281b VK	384	/* TODO: check order here!!! Erez code is different */
2be7d22f	385	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
260e6951	386	wmb(); /* order is important here */
2be7d22f	387
d28bcc30	388	/* wait until device ready */
36b10a72 VK	389	do {
36b10a72 VK	390	msleep(1);
d28bcc30	391	hw_state = R(RGF_USER_HW_MACHINE_STATE);
98a65b59	392	if (delay++ > 100) {
d28bcc30 VK	393	wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
d28bcc30 VK	394	hw_state);
36b10a72 VK	395	return;
36b10a72 VK	396	}
d28bcc30	397	} while (hw_state != HW_MACHINE_BOOT_DONE);
36b10a72	398
6508281b VK	399	/* TODO: Erez check rev_id != 1 */
6508281b VK	400	if (!is_sparrow && (rev_id != 1))
17123991	401	W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
36b10a72	402
972072aa	403	C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
260e6951	404	wmb(); /* order is important here */
972072aa	405
98a65b59	406	wil_dbg_misc(wil, "Reset completed in %d ms\n", delay);
2be7d22f	407
36b10a72	408	#undef R
2be7d22f VK	409	#undef W
2be7d22f VK	410	#undef S
972072aa	411	#undef C
2be7d22f VK	412	}
	413
	414	void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
	415	{
	416	le32_to_cpus(&r->base);
	417	le16_to_cpus(&r->entry_size);
	418	le16_to_cpus(&r->size);
	419	le32_to_cpus(&r->tail);
	420	le32_to_cpus(&r->head);
	421	}
	422
	423	static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
	424	{
	425	ulong to = msecs_to_jiffies(1000);
	426	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
	427	if (0 == left) {
	428	wil_err(wil, "Firmware not ready\n");
	429	return -ETIME;
	430	} else {
15e23124 VK	431	wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
15e23124 VK	432	jiffies_to_msecs(to-left), wil->hw_version);
2be7d22f VK	433	}
	434	return 0;
	435	}
	436
	437	/*
	438	* We reset all the structures, and we reset the UMAC.
	439	* After calling this routine, you're expected to reload
	440	* the firmware.
	441	*/
	442	int wil_reset(struct wil6210_priv *wil)
	443	{
	444	int rc;
	445
097638a0 VK	446	WARN_ON(!mutex_is_locked(&wil->mutex));
	447
	448	cancel_work_sync(&wil->disconnect_worker);
	449	wil6210_disconnect(wil, NULL);
	450
0fef1818 VK	451	wil->status = 0; /* prevent NAPI from being scheduled */
	452	if (test_bit(wil_status_napi_en, &wil->status)) {
	453	napi_synchronize(&wil->napi_rx);
0fef1818 VK	454	}
0fef1818 VK	455
ed6f9dc6 VK	456	if (wil->scan_request) {
	457	wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
	458	wil->scan_request);
047e5d74	459	del_timer_sync(&wil->scan_timer);
ed6f9dc6 VK	460	cfg80211_scan_done(wil->scan_request, true);
	461	wil->scan_request = NULL;
	462	}
	463
e08b5906	464	wil6210_disable_irq(wil);
e08b5906	465
2be7d22f VK	466	wmi_event_flush(wil);
2be7d22f VK	467
2be7d22f	468	flush_workqueue(wil->wmi_wq_conn);
e08b5906	469	flush_workqueue(wil->wmi_wq);
2be7d22f VK	470
	471	/* TODO: put MAC in reset */
	472	wil_target_reset(wil);
	473
8bf6adb9 VK	474	wil_rx_fini(wil);
8bf6adb9 VK	475
2be7d22f VK	476	/* init after reset */
2be7d22f VK	477	wil->pending_connect_cid = -1;
16735d02	478	reinit_completion(&wil->wmi_ready);
2be7d22f	479
2be7d22f VK	480	/* TODO: release MAC reset */
	481	wil6210_enable_irq(wil);
	482
	483	/* we just started MAC, wait for FW ready */
	484	rc = wil_wait_for_fw_ready(wil);
	485
	486	return rc;
	487	}
	488
ed6f9dc6 VK	489	void wil_fw_error_recovery(struct wil6210_priv *wil)
	490	{
	491	wil_dbg_misc(wil, "starting fw error recovery\n");
	492	schedule_work(&wil->fw_error_worker);
	493	}
2be7d22f VK	494
	495	void wil_link_on(struct wil6210_priv *wil)
	496	{
	497	struct net_device *ndev = wil_to_ndev(wil);
	498
7743882d	499	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	500
2be7d22f VK	501	netif_carrier_on(ndev);
55f8f680	502	wil_dbg_misc(wil, "netif_tx_wake : link on\n");
2be7d22f VK	503	netif_tx_wake_all_queues(ndev);
	504	}
	505
	506	void wil_link_off(struct wil6210_priv *wil)
	507	{
	508	struct net_device *ndev = wil_to_ndev(wil);
	509
7743882d	510	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	511
2be7d22f VK	512	netif_tx_stop_all_queues(ndev);
55f8f680	513	wil_dbg_misc(wil, "netif_tx_stop : link off\n");
2be7d22f VK	514	netif_carrier_off(ndev);
	515	}
	516
	517	static int __wil_up(struct wil6210_priv *wil)
	518	{
	519	struct net_device *ndev = wil_to_ndev(wil);
	520	struct wireless_dev *wdev = wil->wdev;
2be7d22f	521	int rc;
2be7d22f	522
097638a0 VK	523	WARN_ON(!mutex_is_locked(&wil->mutex));
097638a0 VK	524
2be7d22f VK	525	rc = wil_reset(wil);
	526	if (rc)
	527	return rc;
	528
e31b2562 VK	529	/* Rx VRING. After MAC and beacon */
	530	rc = wil_rx_init(wil);
	531	if (rc)
	532	return rc;
	533
2be7d22f VK	534	switch (wdev->iftype) {
2be7d22f VK	535	case NL80211_IFTYPE_STATION:
7743882d	536	wil_dbg_misc(wil, "type: STATION\n");
2be7d22f VK	537	ndev->type = ARPHRD_ETHER;
	538	break;
	539	case NL80211_IFTYPE_AP:
7743882d	540	wil_dbg_misc(wil, "type: AP\n");
2be7d22f VK	541	ndev->type = ARPHRD_ETHER;
	542	break;
	543	case NL80211_IFTYPE_P2P_CLIENT:
7743882d	544	wil_dbg_misc(wil, "type: P2P_CLIENT\n");
2be7d22f VK	545	ndev->type = ARPHRD_ETHER;
	546	break;
	547	case NL80211_IFTYPE_P2P_GO:
7743882d	548	wil_dbg_misc(wil, "type: P2P_GO\n");
2be7d22f VK	549	ndev->type = ARPHRD_ETHER;
	550	break;
	551	case NL80211_IFTYPE_MONITOR:
7743882d	552	wil_dbg_misc(wil, "type: Monitor\n");
2be7d22f VK	553	ndev->type = ARPHRD_IEEE80211_RADIOTAP;
	554	/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
	555	break;
	556	default:
	557	return -EOPNOTSUPP;
	558	}
	559
2be7d22f VK	560	/* MAC address - pre-requisite for other commands */
	561	wmi_set_mac_address(wil, ndev->dev_addr);
	562
2be7d22f	563
e0287c4a VK	564	napi_enable(&wil->napi_rx);
e0287c4a VK	565	napi_enable(&wil->napi_tx);
0fef1818	566	set_bit(wil_status_napi_en, &wil->status);
e0287c4a	567
2be7d22f VK	568	return 0;
	569	}
	570
	571	int wil_up(struct wil6210_priv *wil)
	572	{
	573	int rc;
	574
	575	mutex_lock(&wil->mutex);
	576	rc = __wil_up(wil);
	577	mutex_unlock(&wil->mutex);
	578
	579	return rc;
	580	}
	581
	582	static int __wil_down(struct wil6210_priv *wil)
	583	{
097638a0 VK	584	WARN_ON(!mutex_is_locked(&wil->mutex));
097638a0 VK	585
0fef1818	586	clear_bit(wil_status_napi_en, &wil->status);
e0287c4a VK	587	napi_disable(&wil->napi_rx);
	588	napi_disable(&wil->napi_tx);
	589
2be7d22f	590	if (wil->scan_request) {
2a91d7d0 VK	591	wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
2a91d7d0 VK	592	wil->scan_request);
047e5d74	593	del_timer_sync(&wil->scan_timer);
2be7d22f VK	594	cfg80211_scan_done(wil->scan_request, true);
	595	wil->scan_request = NULL;
	596	}
	597
	598	wil6210_disconnect(wil, NULL);
	599	wil_rx_fini(wil);
	600
	601	return 0;
	602	}
	603
	604	int wil_down(struct wil6210_priv *wil)
	605	{
	606	int rc;
	607
	608	mutex_lock(&wil->mutex);
	609	rc = __wil_down(wil);
	610	mutex_unlock(&wil->mutex);
	611
	612	return rc;
	613	}
3df2cd36 VK	614
	615	int wil_find_cid(struct wil6210_priv wil, const u8 mac)
	616	{
	617	int i;
	618	int rc = -ENOENT;
	619
	620	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
	621	if ((wil->sta[i].status != wil_sta_unused) &&
108d1eb6	622	ether_addr_equal(wil->sta[i].addr, mac)) {
3df2cd36 VK	623	rc = i;
	624	break;
	625	}
	626	}
	627
	628	return rc;
	629	}