[deliverable/linux.git] / drivers / net / wireless / ath / wil6210 / main.c

/*
 * Copyright (c) 2012-2014 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");

static bool no_fw_load = true;
module_param(no_fw_load, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(no_fw_load, " do not download FW, use one in on-card flash.");

#define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
#define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */

/*
 * 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);
}

/* target operations */
/* register read */
#define R(a) ioread32(wil->csr + HOSTADDR(a))
/* register write. wmb() to make sure it is completed */
#define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
/* 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)

static inline void wil_halt_cpu(struct wil6210_priv *wil)
{
	W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
	W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
}

static inline void wil_release_cpu(struct wil6210_priv *wil)
{
	/* Start CPU */
	W(RGF_USER_USER_CPU_0, 1);
}

static int 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);

	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));
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);

	wil_halt_cpu(wil);
	C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL); /* 40 MHz */

	if (is_sparrow) {
		W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
		W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
	}

	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 ? 0x000000f0 : 0x00000170);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);

	if (is_sparrow) {
		W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
		W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
	}

	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);

	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);

	/* wait until device ready. typical time is 200..250 msec */
	do {
		msleep(RST_DELAY);
		hw_state = R(RGF_USER_HW_MACHINE_STATE);
		if (delay++ > RST_COUNT) {
			wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
				hw_state);
			return -ETIME;
		}
	} 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);

	wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
	return 0;
}

#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);

	rc = wil_target_reset(wil);
	wil_rx_fini(wil);
	if (rc)
		return rc;

	if (!no_fw_load) {
		wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
		wil_halt_cpu(wil);
		/* Loading f/w from the file */
		rc = wil_request_firmware(wil, WIL_FW_NAME);
		if (rc)
			return rc;

		/* clear any interrupts which on-card-firmware may have set */
		wil6210_clear_irq(wil);
		{ /* CAF_ICR - clear and mask */
			u32 a = HOSTADDR(RGF_CAF_ICR) +
				offsetof(struct RGF_ICR, ICR);
			u32 m = HOSTADDR(RGF_CAF_ICR) +
				offsetof(struct RGF_ICR, IMV);
			u32 icr = ioread32(wil->csr + a);

			iowrite32(icr, wil->csr + a); /* W1C */
			iowrite32(~0, wil->csr + m);
			wmb(); /* wait for completion */
		}
		wil_release_cpu(wil);
	} else {
		wil_info(wil, "Use firmware from on-card flash\n");
	}

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

	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);

	if (wil->platform_ops.bus_request)
		wil->platform_ops.bus_request(wil->platform_handle,
					      WIL_MAX_BUS_REQUEST_KBPS);

	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));

	if (wil->platform_ops.bus_request)
		wil->platform_ops.bus_request(wil->platform_handle, 0);

	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	1	/*
02525a79	2	* Copyright (c) 2012-2014 Qualcomm Atheros, Inc.
2be7d22f VK	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
151a9706 VK	28	static bool no_fw_load = true;
	29	module_param(no_fw_load, bool, S_IRUGO \| S_IWUSR);
	30	MODULE_PARM_DESC(no_fw_load, " do not download FW, use one in on-card flash.");
	31
520d68e7 VK	32	#define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
	33	#define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
	34
2be7d22f VK	35	/*
	36	* Due to a hardware issue,
	37	* one has to read/write to/from NIC in 32-bit chunks;
	38	* regular memcpy_fromio and siblings will
	39	* not work on 64-bit platform - it uses 64-bit transactions
	40	*
	41	* Force 32-bit transactions to enable NIC on 64-bit platforms
	42	*
	43	* To avoid byte swap on big endian host, __raw_{read\|write}l
	44	* should be used - {read\|write}l would swap bytes to provide
	45	* little endian on PCI value in host endianness.
	46	*/
	47	void wil_memcpy_fromio_32(void dst, const volatile void __iomem src,
	48	size_t count)
	49	{
	50	u32 *d = dst;
	51	const volatile u32 __iomem *s = src;
	52
	53	/* size_t is unsigned, if (count%4 != 0) it will wrap */
	54	for (count += 4; count > 4; count -= 4)
	55	*d++ = __raw_readl(s++);
	56	}
	57
	58	void wil_memcpy_toio_32(volatile void __iomem dst, const void src,
	59	size_t count)
	60	{
	61	volatile u32 __iomem *d = dst;
	62	const u32 *s = src;
	63
	64	for (count += 4; count > 4; count -= 4)
	65	__raw_writel(*s++, d++);
	66	}
	67
91886b0b VK	68	static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
	69	{
	70	uint i;
fc58f681 VK	71	struct net_device *ndev = wil_to_ndev(wil);
fc58f681 VK	72	struct wireless_dev *wdev = wil->wdev;
91886b0b	73	struct wil_sta_info *sta = &wil->sta[cid];
8fe59627	74
fc58f681 VK	75	wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
fc58f681 VK	76	sta->status);
4d55a0a1	77
e58c9f70	78	sta->data_port_open = false;
4d55a0a1 VK	79	if (sta->status != wil_sta_unused) {
4d55a0a1 VK	80	wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
fc58f681 VK	81	switch (wdev->iftype) {
	82	case NL80211_IFTYPE_AP:
	83	case NL80211_IFTYPE_P2P_GO:
	84	/* AP-like interface */
	85	cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
	86	break;
	87	default:
	88	break;
	89	}
4d55a0a1 VK	90	sta->status = wil_sta_unused;
	91	}
	92
91886b0b VK	93	for (i = 0; i < WIL_STA_TID_NUM; i++) {
	94	struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
	95	sta->tid_rx[i] = NULL;
	96	wil_tid_ampdu_rx_free(wil, r);
	97	}
	98	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
	99	if (wil->vring2cid_tid[i][0] == cid)
	100	wil_vring_fini_tx(wil, i);
	101	}
	102	memset(&sta->stats, 0, sizeof(sta->stats));
	103	}
	104
3b3a0162	105	static void _wil6210_disconnect(struct wil6210_priv wil, const u8 bssid)
2be7d22f	106	{
91886b0b	107	int cid = -ENOENT;
2be7d22f	108	struct net_device *ndev = wil_to_ndev(wil);
91886b0b VK	109	struct wireless_dev *wdev = wil->wdev;
	110
	111	might_sleep();
	112	if (bssid) {
	113	cid = wil_find_cid(wil, bssid);
	114	wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
	115	} else {
	116	wil_dbg_misc(wil, "%s(all)\n", __func__);
b4490f42 VK	117	}
b4490f42 VK	118
91886b0b VK	119	if (cid >= 0) /* disconnect 1 peer */
	120	wil_disconnect_cid(wil, cid);
	121	else /* disconnect all */
	122	for (cid = 0; cid < WIL6210_MAX_CID; cid++)
	123	wil_disconnect_cid(wil, cid);
	124
	125	/* link state */
	126	switch (wdev->iftype) {
	127	case NL80211_IFTYPE_STATION:
	128	case NL80211_IFTYPE_P2P_CLIENT:
	129	wil_link_off(wil);
	130	if (test_bit(wil_status_fwconnected, &wil->status)) {
	131	clear_bit(wil_status_fwconnected, &wil->status);
	132	cfg80211_disconnected(ndev,
	133	WLAN_STATUS_UNSPECIFIED_FAILURE,
	134	NULL, 0, GFP_KERNEL);
	135	} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
	136	cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
	137	WLAN_STATUS_UNSPECIFIED_FAILURE,
	138	GFP_KERNEL);
	139	}
	140	clear_bit(wil_status_fwconnecting, &wil->status);
91886b0b VK	141	break;
91886b0b VK	142	default:
91886b0b	143	break;
2be7d22f	144	}
2be7d22f VK	145	}
	146
	147	static void wil_disconnect_worker(struct work_struct *work)
	148	{
	149	struct wil6210_priv *wil = container_of(work,
	150	struct wil6210_priv, disconnect_worker);
	151
097638a0	152	mutex_lock(&wil->mutex);
2be7d22f	153	_wil6210_disconnect(wil, NULL);
097638a0	154	mutex_unlock(&wil->mutex);
2be7d22f VK	155	}
	156
	157	static void wil_connect_timer_fn(ulong x)
	158	{
	159	struct wil6210_priv wil = (void )x;
	160
7743882d	161	wil_dbg_misc(wil, "Connect timeout\n");
2be7d22f VK	162
	163	/* reschedule to thread context - disconnect won't
	164	* run from atomic context
	165	*/
	166	schedule_work(&wil->disconnect_worker);
	167	}
	168
047e5d74 VK	169	static void wil_scan_timer_fn(ulong x)
	170	{
	171	struct wil6210_priv wil = (void )x;
	172
	173	clear_bit(wil_status_fwready, &wil->status);
	174	wil_err(wil, "Scan timeout detected, start fw error recovery\n");
	175	schedule_work(&wil->fw_error_worker);
	176	}
	177
ed6f9dc6 VK	178	static void wil_fw_error_worker(struct work_struct *work)
	179	{
	180	struct wil6210_priv *wil = container_of(work,
	181	struct wil6210_priv, fw_error_worker);
	182	struct wireless_dev *wdev = wil->wdev;
	183
	184	wil_dbg_misc(wil, "fw error worker\n");
	185
	186	if (no_fw_recovery)
	187	return;
	188
fc219eed VK	189	/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
	190	* passed since last recovery attempt
	191	*/
	192	if (time_is_after_jiffies(wil->last_fw_recovery +
	193	WIL6210_FW_RECOVERY_TO))
	194	wil->recovery_count++;
	195	else
	196	wil->recovery_count = 1; /* fw was alive for a long time */
	197
	198	if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
	199	wil_err(wil, "too many recovery attempts (%d), giving up\n",
	200	wil->recovery_count);
	201	return;
	202	}
	203
	204	wil->last_fw_recovery = jiffies;
	205
9c3bde56	206	mutex_lock(&wil->mutex);
ed6f9dc6 VK	207	switch (wdev->iftype) {
	208	case NL80211_IFTYPE_STATION:
	209	case NL80211_IFTYPE_P2P_CLIENT:
	210	case NL80211_IFTYPE_MONITOR:
fc219eed VK	211	wil_info(wil, "fw error recovery started (try %d)...\n",
fc219eed VK	212	wil->recovery_count);
ed6f9dc6 VK	213	wil_reset(wil);
	214
	215	/* need to re-allocate Rx ring after reset */
	216	wil_rx_init(wil);
	217	break;
	218	case NL80211_IFTYPE_AP:
	219	case NL80211_IFTYPE_P2P_GO:
	220	/* recovery in these modes is done by upper layers */
	221	break;
	222	default:
	223	break;
	224	}
9c3bde56	225	mutex_unlock(&wil->mutex);
ed6f9dc6 VK	226	}
ed6f9dc6 VK	227
9a177384 VK	228	static int wil_find_free_vring(struct wil6210_priv *wil)
	229	{
	230	int i;
8fe59627	231
9a177384 VK	232	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
	233	if (!wil->vring_tx[i].va)
	234	return i;
	235	}
	236	return -EINVAL;
	237	}
	238
d81079f1 VK	239	static void wil_connect_worker(struct work_struct *work)
	240	{
	241	int rc;
	242	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
	243	connect_worker);
	244	int cid = wil->pending_connect_cid;
9a177384	245	int ringid = wil_find_free_vring(wil);
d81079f1 VK	246
	247	if (cid < 0) {
	248	wil_err(wil, "No connection pending\n");
	249	return;
	250	}
	251
	252	wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
	253
9a177384	254	rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
d81079f1	255	wil->pending_connect_cid = -1;
3df2cd36 VK	256	if (rc == 0) {
3df2cd36 VK	257	wil->sta[cid].status = wil_sta_connected;
d81079f1	258	wil_link_on(wil);
3df2cd36 VK	259	} else {
	260	wil->sta[cid].status = wil_sta_unused;
	261	}
d81079f1 VK	262	}
d81079f1 VK	263
2be7d22f VK	264	int wil_priv_init(struct wil6210_priv *wil)
2be7d22f VK	265	{
7743882d	266	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f	267
3df2cd36 VK	268	memset(wil->sta, 0, sizeof(wil->sta));
3df2cd36 VK	269
2be7d22f VK	270	mutex_init(&wil->mutex);
	271	mutex_init(&wil->wmi_mutex);
	272
	273	init_completion(&wil->wmi_ready);
	274
	275	wil->pending_connect_cid = -1;
	276	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
047e5d74	277	setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
2be7d22f	278
d81079f1	279	INIT_WORK(&wil->connect_worker, wil_connect_worker);
2be7d22f VK	280	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
2be7d22f VK	281	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
ed6f9dc6	282	INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
2be7d22f VK	283
	284	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	285	spin_lock_init(&wil->wmi_ev_lock);
	286
	287	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
	288	if (!wil->wmi_wq)
	289	return -EAGAIN;
	290
	291	wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
	292	if (!wil->wmi_wq_conn) {
	293	destroy_workqueue(wil->wmi_wq);
	294	return -EAGAIN;
	295	}
	296
fc219eed VK	297	wil->last_fw_recovery = jiffies;
fc219eed VK	298
2be7d22f VK	299	return 0;
	300	}
	301
3b3a0162	302	void wil6210_disconnect(struct wil6210_priv wil, const u8 bssid)
2be7d22f VK	303	{
	304	del_timer_sync(&wil->connect_timer);
	305	_wil6210_disconnect(wil, bssid);
	306	}
	307
	308	void wil_priv_deinit(struct wil6210_priv *wil)
	309	{
047e5d74	310	del_timer_sync(&wil->scan_timer);
2be7d22f	311	cancel_work_sync(&wil->disconnect_worker);
ed6f9dc6	312	cancel_work_sync(&wil->fw_error_worker);
097638a0	313	mutex_lock(&wil->mutex);
2be7d22f	314	wil6210_disconnect(wil, NULL);
097638a0	315	mutex_unlock(&wil->mutex);
2be7d22f VK	316	wmi_event_flush(wil);
	317	destroy_workqueue(wil->wmi_wq_conn);
	318	destroy_workqueue(wil->wmi_wq);
	319	}
	320
151a9706 VK	321	/* target operations */
	322	/* register read */
	323	#define R(a) ioread32(wil->csr + HOSTADDR(a))
	324	/* register write. wmb() to make sure it is completed */
	325	#define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
	326	/* register set = read, OR, write */
	327	#define S(a, v) W(a, R(a) \| v)
	328	/* register clear = read, AND with inverted, write */
	329	#define C(a, v) W(a, R(a) & ~v)
	330
	331	static inline void wil_halt_cpu(struct wil6210_priv *wil)
	332	{
	333	W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
	334	W(RGF_USER_MAC_CPU_0, BIT_USER_MAC_CPU_MAN_RST);
	335	}
	336
	337	static inline void wil_release_cpu(struct wil6210_priv *wil)
	338	{
	339	/* Start CPU */
	340	W(RGF_USER_USER_CPU_0, 1);
	341	}
	342
bbb2adc7	343	static int wil_target_reset(struct wil6210_priv *wil)
2be7d22f	344	{
98a65b59	345	int delay = 0;
d28bcc30	346	u32 hw_state;
36b10a72	347	u32 rev_id;
6508281b	348	bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
36b10a72	349
6508281b	350	wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
2be7d22f	351
17123991	352	wil->hw_version = R(RGF_USER_FW_REV_ID);
36b10a72	353	rev_id = wil->hw_version & 0xff;
6508281b VK	354
	355	/* Clear MAC link up */
	356	S(RGF_HP_CTRL, BIT(15));
151a9706 VK	357	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
	358	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
	359
	360	wil_halt_cpu(wil);
	361	C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL); /* 40 MHz */
2be7d22f	362
6508281b VK	363	if (is_sparrow) {
6508281b VK	364	W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
151a9706	365	W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
6508281b VK	366	}
6508281b VK	367
2be7d22f VK	368	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
2be7d22f VK	369	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
151a9706 VK	370	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000f0 : 0x00000170);
151a9706 VK	371	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
2be7d22f	372
6508281b VK	373	if (is_sparrow) {
6508281b VK	374	W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
151a9706	375	W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
6508281b VK	376	}
6508281b VK	377
2be7d22f VK	378	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	379	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	380	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	381	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
	382
6508281b VK	383	if (is_sparrow) {
	384	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
	385	/* reset A2 PCIE AHB */
36b10a72	386	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
6508281b VK	387	} else {
	388	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
	389	if (rev_id == 1) {
	390	/* reset A1 BOTH PCIE AHB & PCIE RGF */
	391	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
	392	} else {
	393	W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) \| BIT(8));
	394	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
	395	}
36b10a72	396	}
6508281b VK	397
6508281b VK	398	/* TODO: check order here!!! Erez code is different */
2be7d22f VK	399	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
2be7d22f VK	400
520d68e7	401	/* wait until device ready. typical time is 200..250 msec */
36b10a72	402	do {
520d68e7	403	msleep(RST_DELAY);
d28bcc30	404	hw_state = R(RGF_USER_HW_MACHINE_STATE);
520d68e7	405	if (delay++ > RST_COUNT) {
d28bcc30 VK	406	wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
d28bcc30 VK	407	hw_state);
bbb2adc7	408	return -ETIME;
36b10a72	409	}
d28bcc30	410	} while (hw_state != HW_MACHINE_BOOT_DONE);
36b10a72	411
6508281b VK	412	/* TODO: Erez check rev_id != 1 */
6508281b VK	413	if (!is_sparrow && (rev_id != 1))
17123991	414	W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
36b10a72	415
972072aa VK	416	C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
972072aa VK	417
520d68e7	418	wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
bbb2adc7	419	return 0;
151a9706	420	}
2be7d22f	421
36b10a72	422	#undef R
2be7d22f VK	423	#undef W
2be7d22f VK	424	#undef S
972072aa	425	#undef C
2be7d22f VK	426
	427	void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
	428	{
	429	le32_to_cpus(&r->base);
	430	le16_to_cpus(&r->entry_size);
	431	le16_to_cpus(&r->size);
	432	le32_to_cpus(&r->tail);
	433	le32_to_cpus(&r->head);
	434	}
	435
	436	static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
	437	{
	438	ulong to = msecs_to_jiffies(1000);
	439	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
8fe59627	440
2be7d22f VK	441	if (0 == left) {
	442	wil_err(wil, "Firmware not ready\n");
	443	return -ETIME;
	444	} else {
15e23124 VK	445	wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
15e23124 VK	446	jiffies_to_msecs(to-left), wil->hw_version);
2be7d22f VK	447	}
	448	return 0;
	449	}
	450
	451	/*
	452	* We reset all the structures, and we reset the UMAC.
	453	* After calling this routine, you're expected to reload
	454	* the firmware.
	455	*/
	456	int wil_reset(struct wil6210_priv *wil)
	457	{
	458	int rc;
	459
097638a0 VK	460	WARN_ON(!mutex_is_locked(&wil->mutex));
	461
	462	cancel_work_sync(&wil->disconnect_worker);
	463	wil6210_disconnect(wil, NULL);
	464
0fef1818	465	wil->status = 0; /* prevent NAPI from being scheduled */
8fe59627	466	if (test_bit(wil_status_napi_en, &wil->status))
0fef1818	467	napi_synchronize(&wil->napi_rx);
0fef1818	468
ed6f9dc6 VK	469	if (wil->scan_request) {
	470	wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
	471	wil->scan_request);
047e5d74	472	del_timer_sync(&wil->scan_timer);
ed6f9dc6 VK	473	cfg80211_scan_done(wil->scan_request, true);
	474	wil->scan_request = NULL;
	475	}
	476
e08b5906	477	wil6210_disable_irq(wil);
e08b5906	478
2be7d22f VK	479	wmi_event_flush(wil);
2be7d22f VK	480
2be7d22f	481	flush_workqueue(wil->wmi_wq_conn);
e08b5906	482	flush_workqueue(wil->wmi_wq);
2be7d22f	483
bbb2adc7	484	rc = wil_target_reset(wil);
8bf6adb9	485	wil_rx_fini(wil);
bbb2adc7 VK	486	if (rc)
	487	return rc;
	488
151a9706 VK	489	if (!no_fw_load) {
	490	wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
	491	wil_halt_cpu(wil);
	492	/* Loading f/w from the file */
	493	rc = wil_request_firmware(wil, WIL_FW_NAME);
	494	if (rc)
	495	return rc;
	496
	497	/* clear any interrupts which on-card-firmware may have set */
	498	wil6210_clear_irq(wil);
	499	{ /* CAF_ICR - clear and mask */
	500	u32 a = HOSTADDR(RGF_CAF_ICR) +
	501	offsetof(struct RGF_ICR, ICR);
	502	u32 m = HOSTADDR(RGF_CAF_ICR) +
	503	offsetof(struct RGF_ICR, IMV);
	504	u32 icr = ioread32(wil->csr + a);
	505
	506	iowrite32(icr, wil->csr + a); /* W1C */
	507	iowrite32(~0, wil->csr + m);
	508	wmb(); /* wait for completion */
	509	}
	510	wil_release_cpu(wil);
	511	} else {
	512	wil_info(wil, "Use firmware from on-card flash\n");
	513	}
8bf6adb9	514
2be7d22f VK	515	/* init after reset */
2be7d22f VK	516	wil->pending_connect_cid = -1;
16735d02	517	reinit_completion(&wil->wmi_ready);
2be7d22f	518
2be7d22f VK	519	wil6210_enable_irq(wil);
	520
	521	/* we just started MAC, wait for FW ready */
	522	rc = wil_wait_for_fw_ready(wil);
	523
	524	return rc;
	525	}
	526
ed6f9dc6 VK	527	void wil_fw_error_recovery(struct wil6210_priv *wil)
	528	{
	529	wil_dbg_misc(wil, "starting fw error recovery\n");
	530	schedule_work(&wil->fw_error_worker);
	531	}
2be7d22f VK	532
	533	void wil_link_on(struct wil6210_priv *wil)
	534	{
	535	struct net_device *ndev = wil_to_ndev(wil);
	536
7743882d	537	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	538
2be7d22f VK	539	netif_carrier_on(ndev);
55f8f680	540	wil_dbg_misc(wil, "netif_tx_wake : link on\n");
2be7d22f VK	541	netif_tx_wake_all_queues(ndev);
	542	}
	543
	544	void wil_link_off(struct wil6210_priv *wil)
	545	{
	546	struct net_device *ndev = wil_to_ndev(wil);
	547
7743882d	548	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	549
2be7d22f VK	550	netif_tx_stop_all_queues(ndev);
55f8f680	551	wil_dbg_misc(wil, "netif_tx_stop : link off\n");
2be7d22f VK	552	netif_carrier_off(ndev);
	553	}
	554
	555	static int __wil_up(struct wil6210_priv *wil)
	556	{
	557	struct net_device *ndev = wil_to_ndev(wil);
	558	struct wireless_dev *wdev = wil->wdev;
2be7d22f	559	int rc;
2be7d22f	560
097638a0 VK	561	WARN_ON(!mutex_is_locked(&wil->mutex));
097638a0 VK	562
2be7d22f VK	563	rc = wil_reset(wil);
	564	if (rc)
	565	return rc;
	566
e31b2562 VK	567	/* Rx VRING. After MAC and beacon */
	568	rc = wil_rx_init(wil);
	569	if (rc)
	570	return rc;
	571
2be7d22f VK	572	switch (wdev->iftype) {
2be7d22f VK	573	case NL80211_IFTYPE_STATION:
7743882d	574	wil_dbg_misc(wil, "type: STATION\n");
2be7d22f VK	575	ndev->type = ARPHRD_ETHER;
	576	break;
	577	case NL80211_IFTYPE_AP:
7743882d	578	wil_dbg_misc(wil, "type: AP\n");
2be7d22f VK	579	ndev->type = ARPHRD_ETHER;
	580	break;
	581	case NL80211_IFTYPE_P2P_CLIENT:
7743882d	582	wil_dbg_misc(wil, "type: P2P_CLIENT\n");
2be7d22f VK	583	ndev->type = ARPHRD_ETHER;
	584	break;
	585	case NL80211_IFTYPE_P2P_GO:
7743882d	586	wil_dbg_misc(wil, "type: P2P_GO\n");
2be7d22f VK	587	ndev->type = ARPHRD_ETHER;
	588	break;
	589	case NL80211_IFTYPE_MONITOR:
7743882d	590	wil_dbg_misc(wil, "type: Monitor\n");
2be7d22f VK	591	ndev->type = ARPHRD_IEEE80211_RADIOTAP;
	592	/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
	593	break;
	594	default:
	595	return -EOPNOTSUPP;
	596	}
	597
2be7d22f VK	598	/* MAC address - pre-requisite for other commands */
	599	wmi_set_mac_address(wil, ndev->dev_addr);
	600
2be7d22f	601
e0287c4a VK	602	napi_enable(&wil->napi_rx);
e0287c4a VK	603	napi_enable(&wil->napi_tx);
0fef1818	604	set_bit(wil_status_napi_en, &wil->status);
e0287c4a	605
f772ebfb VK	606	if (wil->platform_ops.bus_request)
	607	wil->platform_ops.bus_request(wil->platform_handle,
	608	WIL_MAX_BUS_REQUEST_KBPS);
	609
2be7d22f VK	610	return 0;
	611	}
	612
	613	int wil_up(struct wil6210_priv *wil)
	614	{
	615	int rc;
	616
	617	mutex_lock(&wil->mutex);
	618	rc = __wil_up(wil);
	619	mutex_unlock(&wil->mutex);
	620
	621	return rc;
	622	}
	623
	624	static int __wil_down(struct wil6210_priv *wil)
	625	{
097638a0 VK	626	WARN_ON(!mutex_is_locked(&wil->mutex));
097638a0 VK	627
f772ebfb VK	628	if (wil->platform_ops.bus_request)
	629	wil->platform_ops.bus_request(wil->platform_handle, 0);
	630
0fef1818	631	clear_bit(wil_status_napi_en, &wil->status);
e0287c4a VK	632	napi_disable(&wil->napi_rx);
	633	napi_disable(&wil->napi_tx);
	634
2be7d22f	635	if (wil->scan_request) {
2a91d7d0 VK	636	wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
2a91d7d0 VK	637	wil->scan_request);
047e5d74	638	del_timer_sync(&wil->scan_timer);
2be7d22f VK	639	cfg80211_scan_done(wil->scan_request, true);
	640	wil->scan_request = NULL;
	641	}
	642
	643	wil6210_disconnect(wil, NULL);
	644	wil_rx_fini(wil);
	645
	646	return 0;
	647	}
	648
	649	int wil_down(struct wil6210_priv *wil)
	650	{
	651	int rc;
	652
	653	mutex_lock(&wil->mutex);
	654	rc = __wil_down(wil);
	655	mutex_unlock(&wil->mutex);
	656
	657	return rc;
	658	}
3df2cd36 VK	659
	660	int wil_find_cid(struct wil6210_priv wil, const u8 mac)
	661	{
	662	int i;
	663	int rc = -ENOENT;
	664
	665	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
	666	if ((wil->sta[i].status != wil_sta_unused) &&
108d1eb6	667	ether_addr_equal(wil->sta[i].addr, mac)) {
3df2cd36 VK	668	rc = i;
	669	break;
	670	}
	671	}
	672
	673	return rc;
	674	}