[deliverable/linux.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 wil_sta_info *sta = &wil->sta[cid];

	sta->data_port_open = false;
	if (sta->status != wil_sta_unused) {
		wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
		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:
		/* AP-like interface and monitor:
		 * never scan, always connected
		 */
		if (bssid)
			cfg80211_del_sta(ndev, bssid, GFP_KERNEL);
		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;

	wil_dbg_misc(wil, "Resetting...\n");

	/* 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;
	/* 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 */

	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, 0x00000170);
	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
	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 */

	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
	if (rev_id == 1) {
		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);
	}
	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);

	if (rev_id == 2)
		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);
	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);
	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;
	64	struct wil_sta_info *sta = &wil->sta[cid];
4d55a0a1	65
e58c9f70	66	sta->data_port_open = false;
4d55a0a1 VK	67	if (sta->status != wil_sta_unused) {
	68	wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
	69	sta->status = wil_sta_unused;
	70	}
	71
91886b0b VK	72	for (i = 0; i < WIL_STA_TID_NUM; i++) {
	73	struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
	74	sta->tid_rx[i] = NULL;
	75	wil_tid_ampdu_rx_free(wil, r);
	76	}
	77	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
	78	if (wil->vring2cid_tid[i][0] == cid)
	79	wil_vring_fini_tx(wil, i);
	80	}
	81	memset(&sta->stats, 0, sizeof(sta->stats));
	82	}
	83
3b3a0162	84	static void _wil6210_disconnect(struct wil6210_priv wil, const u8 bssid)
2be7d22f	85	{
91886b0b	86	int cid = -ENOENT;
2be7d22f	87	struct net_device *ndev = wil_to_ndev(wil);
91886b0b VK	88	struct wireless_dev *wdev = wil->wdev;
	89
	90	might_sleep();
	91	if (bssid) {
	92	cid = wil_find_cid(wil, bssid);
	93	wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
	94	} else {
	95	wil_dbg_misc(wil, "%s(all)\n", __func__);
b4490f42 VK	96	}
b4490f42 VK	97
91886b0b VK	98	if (cid >= 0) /* disconnect 1 peer */
	99	wil_disconnect_cid(wil, cid);
	100	else /* disconnect all */
	101	for (cid = 0; cid < WIL6210_MAX_CID; cid++)
	102	wil_disconnect_cid(wil, cid);
	103
	104	/* link state */
	105	switch (wdev->iftype) {
	106	case NL80211_IFTYPE_STATION:
	107	case NL80211_IFTYPE_P2P_CLIENT:
	108	wil_link_off(wil);
	109	if (test_bit(wil_status_fwconnected, &wil->status)) {
	110	clear_bit(wil_status_fwconnected, &wil->status);
	111	cfg80211_disconnected(ndev,
	112	WLAN_STATUS_UNSPECIFIED_FAILURE,
	113	NULL, 0, GFP_KERNEL);
	114	} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
	115	cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
	116	WLAN_STATUS_UNSPECIFIED_FAILURE,
	117	GFP_KERNEL);
	118	}
	119	clear_bit(wil_status_fwconnecting, &wil->status);
91886b0b VK	120	break;
	121	default:
	122	/* AP-like interface and monitor:
	123	* never scan, always connected
	124	*/
	125	if (bssid)
	126	cfg80211_del_sta(ndev, bssid, GFP_KERNEL);
	127	break;
2be7d22f	128	}
2be7d22f VK	129	}
	130
	131	static void wil_disconnect_worker(struct work_struct *work)
	132	{
	133	struct wil6210_priv *wil = container_of(work,
	134	struct wil6210_priv, disconnect_worker);
	135
097638a0	136	mutex_lock(&wil->mutex);
2be7d22f	137	_wil6210_disconnect(wil, NULL);
097638a0	138	mutex_unlock(&wil->mutex);
2be7d22f VK	139	}
	140
	141	static void wil_connect_timer_fn(ulong x)
	142	{
	143	struct wil6210_priv wil = (void )x;
	144
7743882d	145	wil_dbg_misc(wil, "Connect timeout\n");
2be7d22f VK	146
	147	/* reschedule to thread context - disconnect won't
	148	* run from atomic context
	149	*/
	150	schedule_work(&wil->disconnect_worker);
	151	}
	152
047e5d74 VK	153	static void wil_scan_timer_fn(ulong x)
	154	{
	155	struct wil6210_priv wil = (void )x;
	156
	157	clear_bit(wil_status_fwready, &wil->status);
	158	wil_err(wil, "Scan timeout detected, start fw error recovery\n");
	159	schedule_work(&wil->fw_error_worker);
	160	}
	161
ed6f9dc6 VK	162	static void wil_fw_error_worker(struct work_struct *work)
	163	{
	164	struct wil6210_priv *wil = container_of(work,
	165	struct wil6210_priv, fw_error_worker);
	166	struct wireless_dev *wdev = wil->wdev;
	167
	168	wil_dbg_misc(wil, "fw error worker\n");
	169
	170	if (no_fw_recovery)
	171	return;
	172
fc219eed VK	173	/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
	174	* passed since last recovery attempt
	175	*/
	176	if (time_is_after_jiffies(wil->last_fw_recovery +
	177	WIL6210_FW_RECOVERY_TO))
	178	wil->recovery_count++;
	179	else
	180	wil->recovery_count = 1; /* fw was alive for a long time */
	181
	182	if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
	183	wil_err(wil, "too many recovery attempts (%d), giving up\n",
	184	wil->recovery_count);
	185	return;
	186	}
	187
	188	wil->last_fw_recovery = jiffies;
	189
9c3bde56	190	mutex_lock(&wil->mutex);
ed6f9dc6 VK	191	switch (wdev->iftype) {
	192	case NL80211_IFTYPE_STATION:
	193	case NL80211_IFTYPE_P2P_CLIENT:
	194	case NL80211_IFTYPE_MONITOR:
fc219eed VK	195	wil_info(wil, "fw error recovery started (try %d)...\n",
fc219eed VK	196	wil->recovery_count);
ed6f9dc6 VK	197	wil_reset(wil);
	198
	199	/* need to re-allocate Rx ring after reset */
	200	wil_rx_init(wil);
	201	break;
	202	case NL80211_IFTYPE_AP:
	203	case NL80211_IFTYPE_P2P_GO:
	204	/* recovery in these modes is done by upper layers */
	205	break;
	206	default:
	207	break;
	208	}
9c3bde56	209	mutex_unlock(&wil->mutex);
ed6f9dc6 VK	210	}
ed6f9dc6 VK	211
9a177384 VK	212	static int wil_find_free_vring(struct wil6210_priv *wil)
	213	{
	214	int i;
	215	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
	216	if (!wil->vring_tx[i].va)
	217	return i;
	218	}
	219	return -EINVAL;
	220	}
	221
d81079f1 VK	222	static void wil_connect_worker(struct work_struct *work)
	223	{
	224	int rc;
	225	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
	226	connect_worker);
	227	int cid = wil->pending_connect_cid;
9a177384	228	int ringid = wil_find_free_vring(wil);
d81079f1 VK	229
	230	if (cid < 0) {
	231	wil_err(wil, "No connection pending\n");
	232	return;
	233	}
	234
	235	wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
	236
9a177384	237	rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
d81079f1	238	wil->pending_connect_cid = -1;
3df2cd36 VK	239	if (rc == 0) {
3df2cd36 VK	240	wil->sta[cid].status = wil_sta_connected;
d81079f1	241	wil_link_on(wil);
3df2cd36 VK	242	} else {
	243	wil->sta[cid].status = wil_sta_unused;
	244	}
d81079f1 VK	245	}
d81079f1 VK	246
2be7d22f VK	247	int wil_priv_init(struct wil6210_priv *wil)
2be7d22f VK	248	{
7743882d	249	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f	250
3df2cd36 VK	251	memset(wil->sta, 0, sizeof(wil->sta));
3df2cd36 VK	252
2be7d22f VK	253	mutex_init(&wil->mutex);
	254	mutex_init(&wil->wmi_mutex);
	255
	256	init_completion(&wil->wmi_ready);
	257
	258	wil->pending_connect_cid = -1;
	259	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
047e5d74	260	setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
2be7d22f	261
d81079f1	262	INIT_WORK(&wil->connect_worker, wil_connect_worker);
2be7d22f VK	263	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
2be7d22f VK	264	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
ed6f9dc6	265	INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
2be7d22f VK	266
	267	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	268	spin_lock_init(&wil->wmi_ev_lock);
	269
	270	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
	271	if (!wil->wmi_wq)
	272	return -EAGAIN;
	273
	274	wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
	275	if (!wil->wmi_wq_conn) {
	276	destroy_workqueue(wil->wmi_wq);
	277	return -EAGAIN;
	278	}
	279
fc219eed VK	280	wil->last_fw_recovery = jiffies;
fc219eed VK	281
2be7d22f VK	282	return 0;
	283	}
	284
3b3a0162	285	void wil6210_disconnect(struct wil6210_priv wil, const u8 bssid)
2be7d22f VK	286	{
	287	del_timer_sync(&wil->connect_timer);
	288	_wil6210_disconnect(wil, bssid);
	289	}
	290
	291	void wil_priv_deinit(struct wil6210_priv *wil)
	292	{
047e5d74	293	del_timer_sync(&wil->scan_timer);
2be7d22f	294	cancel_work_sync(&wil->disconnect_worker);
ed6f9dc6	295	cancel_work_sync(&wil->fw_error_worker);
097638a0	296	mutex_lock(&wil->mutex);
2be7d22f	297	wil6210_disconnect(wil, NULL);
097638a0	298	mutex_unlock(&wil->mutex);
2be7d22f VK	299	wmi_event_flush(wil);
	300	destroy_workqueue(wil->wmi_wq_conn);
	301	destroy_workqueue(wil->wmi_wq);
	302	}
	303
	304	static void wil_target_reset(struct wil6210_priv *wil)
	305	{
98a65b59	306	int delay = 0;
d28bcc30	307	u32 hw_state;
36b10a72 VK	308	u32 rev_id;
36b10a72 VK	309
7743882d	310	wil_dbg_misc(wil, "Resetting...\n");
2be7d22f	311
36b10a72 VK	312	/* register read */
36b10a72 VK	313	#define R(a) ioread32(wil->csr + HOSTADDR(a))
2be7d22f VK	314	/* register write */
	315	#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
	316	/* register set = read, OR, write */
972072aa VK	317	#define S(a, v) W(a, R(a) \| v)
	318	/* register clear = read, AND with inverted, write */
	319	#define C(a, v) W(a, R(a) & ~v)
2be7d22f	320
17123991	321	wil->hw_version = R(RGF_USER_FW_REV_ID);
36b10a72	322	rev_id = wil->hw_version & 0xff;
2be7d22f VK	323	/* hpal_perst_from_pad_src_n_mask */
	324	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
	325	/* car_perst_rst_src_n_mask */
	326	S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
260e6951	327	wmb(); /* order is important here */
2be7d22f VK	328
	329	W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
	330	W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
260e6951	331	wmb(); /* order is important here */
2be7d22f	332
2be7d22f VK	333	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
	334	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
	335	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
	336	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
260e6951	337	wmb(); /* order is important here */
2be7d22f	338
2be7d22f VK	339	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	340	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	341	W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	342	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
260e6951	343	wmb(); /* order is important here */
2be7d22f VK	344
2be7d22f VK	345	W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
36b10a72 VK	346	if (rev_id == 1) {
	347	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
	348	} else {
17123991	349	W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) \| BIT(8));
36b10a72 VK	350	W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
36b10a72 VK	351	}
2be7d22f	352	W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
260e6951	353	wmb(); /* order is important here */
2be7d22f	354
d28bcc30	355	/* wait until device ready */
36b10a72 VK	356	do {
36b10a72 VK	357	msleep(1);
d28bcc30	358	hw_state = R(RGF_USER_HW_MACHINE_STATE);
98a65b59	359	if (delay++ > 100) {
d28bcc30 VK	360	wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
d28bcc30 VK	361	hw_state);
36b10a72 VK	362	return;
36b10a72 VK	363	}
d28bcc30	364	} while (hw_state != HW_MACHINE_BOOT_DONE);
36b10a72 VK	365
36b10a72 VK	366	if (rev_id == 2)
17123991	367	W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
36b10a72	368
972072aa	369	C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
260e6951	370	wmb(); /* order is important here */
972072aa	371
98a65b59	372	wil_dbg_misc(wil, "Reset completed in %d ms\n", delay);
2be7d22f	373
36b10a72	374	#undef R
2be7d22f VK	375	#undef W
2be7d22f VK	376	#undef S
972072aa	377	#undef C
2be7d22f VK	378	}
	379
	380	void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
	381	{
	382	le32_to_cpus(&r->base);
	383	le16_to_cpus(&r->entry_size);
	384	le16_to_cpus(&r->size);
	385	le32_to_cpus(&r->tail);
	386	le32_to_cpus(&r->head);
	387	}
	388
	389	static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
	390	{
	391	ulong to = msecs_to_jiffies(1000);
	392	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
	393	if (0 == left) {
	394	wil_err(wil, "Firmware not ready\n");
	395	return -ETIME;
	396	} else {
15e23124 VK	397	wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
15e23124 VK	398	jiffies_to_msecs(to-left), wil->hw_version);
2be7d22f VK	399	}
	400	return 0;
	401	}
	402
	403	/*
	404	* We reset all the structures, and we reset the UMAC.
	405	* After calling this routine, you're expected to reload
	406	* the firmware.
	407	*/
	408	int wil_reset(struct wil6210_priv *wil)
	409	{
	410	int rc;
	411
097638a0 VK	412	WARN_ON(!mutex_is_locked(&wil->mutex));
	413
	414	cancel_work_sync(&wil->disconnect_worker);
	415	wil6210_disconnect(wil, NULL);
	416
0fef1818 VK	417	wil->status = 0; /* prevent NAPI from being scheduled */
	418	if (test_bit(wil_status_napi_en, &wil->status)) {
	419	napi_synchronize(&wil->napi_rx);
0fef1818 VK	420	}
0fef1818 VK	421
ed6f9dc6 VK	422	if (wil->scan_request) {
	423	wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
	424	wil->scan_request);
047e5d74	425	del_timer_sync(&wil->scan_timer);
ed6f9dc6 VK	426	cfg80211_scan_done(wil->scan_request, true);
	427	wil->scan_request = NULL;
	428	}
	429
e08b5906	430	wil6210_disable_irq(wil);
e08b5906	431
2be7d22f VK	432	wmi_event_flush(wil);
2be7d22f VK	433
2be7d22f	434	flush_workqueue(wil->wmi_wq_conn);
e08b5906	435	flush_workqueue(wil->wmi_wq);
2be7d22f VK	436
	437	/* TODO: put MAC in reset */
	438	wil_target_reset(wil);
	439
8bf6adb9 VK	440	wil_rx_fini(wil);
8bf6adb9 VK	441
2be7d22f VK	442	/* init after reset */
2be7d22f VK	443	wil->pending_connect_cid = -1;
16735d02	444	reinit_completion(&wil->wmi_ready);
2be7d22f	445
2be7d22f VK	446	/* TODO: release MAC reset */
	447	wil6210_enable_irq(wil);
	448
	449	/* we just started MAC, wait for FW ready */
	450	rc = wil_wait_for_fw_ready(wil);
	451
	452	return rc;
	453	}
	454
ed6f9dc6 VK	455	void wil_fw_error_recovery(struct wil6210_priv *wil)
	456	{
	457	wil_dbg_misc(wil, "starting fw error recovery\n");
	458	schedule_work(&wil->fw_error_worker);
	459	}
2be7d22f VK	460
	461	void wil_link_on(struct wil6210_priv *wil)
	462	{
	463	struct net_device *ndev = wil_to_ndev(wil);
	464
7743882d	465	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	466
	467	netif_carrier_on(ndev);
	468	netif_tx_wake_all_queues(ndev);
	469	}
	470
	471	void wil_link_off(struct wil6210_priv *wil)
	472	{
	473	struct net_device *ndev = wil_to_ndev(wil);
	474
7743882d	475	wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f VK	476
	477	netif_tx_stop_all_queues(ndev);
	478	netif_carrier_off(ndev);
	479	}
	480
	481	static int __wil_up(struct wil6210_priv *wil)
	482	{
	483	struct net_device *ndev = wil_to_ndev(wil);
	484	struct wireless_dev *wdev = wil->wdev;
2be7d22f	485	int rc;
2be7d22f	486
097638a0 VK	487	WARN_ON(!mutex_is_locked(&wil->mutex));
097638a0 VK	488
2be7d22f VK	489	rc = wil_reset(wil);
	490	if (rc)
	491	return rc;
	492
e31b2562 VK	493	/* Rx VRING. After MAC and beacon */
	494	rc = wil_rx_init(wil);
	495	if (rc)
	496	return rc;
	497
2be7d22f VK	498	switch (wdev->iftype) {
2be7d22f VK	499	case NL80211_IFTYPE_STATION:
7743882d	500	wil_dbg_misc(wil, "type: STATION\n");
2be7d22f VK	501	ndev->type = ARPHRD_ETHER;
	502	break;
	503	case NL80211_IFTYPE_AP:
7743882d	504	wil_dbg_misc(wil, "type: AP\n");
2be7d22f VK	505	ndev->type = ARPHRD_ETHER;
	506	break;
	507	case NL80211_IFTYPE_P2P_CLIENT:
7743882d	508	wil_dbg_misc(wil, "type: P2P_CLIENT\n");
2be7d22f VK	509	ndev->type = ARPHRD_ETHER;
	510	break;
	511	case NL80211_IFTYPE_P2P_GO:
7743882d	512	wil_dbg_misc(wil, "type: P2P_GO\n");
2be7d22f VK	513	ndev->type = ARPHRD_ETHER;
	514	break;
	515	case NL80211_IFTYPE_MONITOR:
7743882d	516	wil_dbg_misc(wil, "type: Monitor\n");
2be7d22f VK	517	ndev->type = ARPHRD_IEEE80211_RADIOTAP;
	518	/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
	519	break;
	520	default:
	521	return -EOPNOTSUPP;
	522	}
	523
2be7d22f VK	524	/* MAC address - pre-requisite for other commands */
	525	wmi_set_mac_address(wil, ndev->dev_addr);
	526
2be7d22f	527
e0287c4a VK	528	napi_enable(&wil->napi_rx);
e0287c4a VK	529	napi_enable(&wil->napi_tx);
0fef1818	530	set_bit(wil_status_napi_en, &wil->status);
e0287c4a	531
2be7d22f VK	532	return 0;
	533	}
	534
	535	int wil_up(struct wil6210_priv *wil)
	536	{
	537	int rc;
	538
	539	mutex_lock(&wil->mutex);
	540	rc = __wil_up(wil);
	541	mutex_unlock(&wil->mutex);
	542
	543	return rc;
	544	}
	545
	546	static int __wil_down(struct wil6210_priv *wil)
	547	{
097638a0 VK	548	WARN_ON(!mutex_is_locked(&wil->mutex));
097638a0 VK	549
0fef1818	550	clear_bit(wil_status_napi_en, &wil->status);
e0287c4a VK	551	napi_disable(&wil->napi_rx);
	552	napi_disable(&wil->napi_tx);
	553
2be7d22f	554	if (wil->scan_request) {
2a91d7d0 VK	555	wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
2a91d7d0 VK	556	wil->scan_request);
047e5d74	557	del_timer_sync(&wil->scan_timer);
2be7d22f VK	558	cfg80211_scan_done(wil->scan_request, true);
	559	wil->scan_request = NULL;
	560	}
	561
	562	wil6210_disconnect(wil, NULL);
	563	wil_rx_fini(wil);
	564
	565	return 0;
	566	}
	567
	568	int wil_down(struct wil6210_priv *wil)
	569	{
	570	int rc;
	571
	572	mutex_lock(&wil->mutex);
	573	rc = __wil_down(wil);
	574	mutex_unlock(&wil->mutex);
	575
	576	return rc;
	577	}
3df2cd36 VK	578
	579	int wil_find_cid(struct wil6210_priv wil, const u8 mac)
	580	{
	581	int i;
	582	int rc = -ENOENT;
	583
	584	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
	585	if ((wil->sta[i].status != wil_sta_unused) &&
108d1eb6	586	ether_addr_equal(wil->sta[i].addr, mac)) {
3df2cd36 VK	587	rc = i;
	588	break;
	589	}
	590	}
	591
	592	return rc;
	593	}