/*
 * DHD debugability Linux os layer
 *
 * Copyright (C) 2020, Broadcom.
 *
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 *
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 *
 *
 * <<Broadcom-WL-IPTag/Open:>>
 *
 * $Id$
 */

#include <typedefs.h>
#include <osl.h>
#include <bcmutils.h>
#include <bcmendian.h>
#include <dngl_stats.h>
#include <dhd.h>
#include <dhd_dbg.h>
#include <dhd_debug.h>

#include <net/cfg80211.h>
#include <wl_cfgvendor.h>

typedef void (*dbg_ring_send_sub_t)(void *ctx, const int ring_id, const void *data,
	const uint32 len, const dhd_dbg_ring_status_t ring_status);
typedef void (*dbg_urgent_noti_sub_t)(void *ctx, const void *data,
	const uint32 len, const uint32 fw_len);

static dbg_ring_send_sub_t ring_send_sub_cb[DEBUG_RING_ID_MAX];
static dbg_urgent_noti_sub_t urgent_noti_sub_cb;
typedef struct dhd_dbg_os_ring_info {
	dhd_pub_t *dhdp;
	int ring_id;
	int log_level;
	unsigned long interval;
	struct delayed_work work;
	uint64 tsoffset;
} linux_dbgring_info_t;

struct log_level_table dhd_event_map[] = {
	{1, WIFI_EVENT_DRIVER_EAPOL_FRAME_TRANSMIT_REQUESTED, "DRIVER EAPOL TX REQ"},
	{1, WIFI_EVENT_DRIVER_EAPOL_FRAME_RECEIVED, "DRIVER EAPOL RX"},
	{2, WIFI_EVENT_DRIVER_SCAN_REQUESTED, "SCAN_REQUESTED"},
	{2, WIFI_EVENT_DRIVER_SCAN_COMPLETE, "SCAN COMPELETE"},
	{3, WIFI_EVENT_DRIVER_SCAN_RESULT_FOUND, "SCAN RESULT FOUND"},
	{2, WIFI_EVENT_DRIVER_PNO_ADD, "PNO ADD"},
	{2, WIFI_EVENT_DRIVER_PNO_REMOVE, "PNO REMOVE"},
	{2, WIFI_EVENT_DRIVER_PNO_NETWORK_FOUND, "PNO NETWORK FOUND"},
	{2, WIFI_EVENT_DRIVER_PNO_SCAN_REQUESTED, "PNO SCAN_REQUESTED"},
	{1, WIFI_EVENT_DRIVER_PNO_SCAN_RESULT_FOUND, "PNO SCAN RESULT FOUND"},
	{1, WIFI_EVENT_DRIVER_PNO_SCAN_COMPLETE, "PNO SCAN COMPELETE"}
};

static void
debug_data_send(dhd_pub_t *dhdp, int ring_id, const void *data, const uint32 len,
	const dhd_dbg_ring_status_t ring_status)
{
	struct net_device *ndev;
	dbg_ring_send_sub_t ring_sub_send;
	ndev = dhd_linux_get_primary_netdev(dhdp);
	if (!ndev)
		return;
	if (!VALID_RING(ring_id))
		return;
	if (ring_send_sub_cb[ring_id]) {
		ring_sub_send = ring_send_sub_cb[ring_id];
		ring_sub_send(ndev, ring_id, data, len, ring_status);
	}
}

static void
dhd_os_dbg_urgent_notifier(dhd_pub_t *dhdp, const void *data, const uint32 len)
{
	struct net_device *ndev;
	ndev = dhd_linux_get_primary_netdev(dhdp);
	if (!ndev)
		return;
	if (urgent_noti_sub_cb) {
		urgent_noti_sub_cb(ndev, data, len, dhdp->soc_ram_length);
	}
}

static void
dbg_ring_poll_worker(struct work_struct *work)
{
	struct delayed_work *d_work = to_delayed_work(work);
	bool sched = TRUE;
	dhd_dbg_ring_t *ring;
	linux_dbgring_info_t *ring_info;
	dhd_pub_t *dhdp;
	int ringid;
	dhd_dbg_ring_status_t ring_status;
	void *buf;
	dhd_dbg_ring_entry_t *hdr;
	uint32 buflen, rlen;
	unsigned long flags;

	GCC_DIAGNOSTIC_PUSH_SUPPRESS_CAST();
	ring_info = container_of(d_work, linux_dbgring_info_t, work);
	GCC_DIAGNOSTIC_POP();

	dhdp = ring_info->dhdp;
	ringid = ring_info->ring_id;

	ring = &dhdp->dbg->dbg_rings[ringid];
	DHD_DBG_RING_LOCK(ring->lock, flags);

	dhd_dbg_get_ring_status(dhdp, ringid, &ring_status);

	if (ring->wp > ring->rp) {
		buflen = ring->wp - ring->rp;
	} else if (ring->wp < ring->rp) {
		buflen = ring->ring_size - ring->rp + ring->wp;
	} else {
		DHD_DBG_RING_UNLOCK(ring->lock, flags);
		goto exit;
	}

	if (buflen > ring->ring_size) {
		DHD_DBG_RING_UNLOCK(ring->lock, flags);
		goto exit;
	}
	DHD_DBG_RING_UNLOCK(ring->lock, flags);

	buf = MALLOCZ(dhdp->osh, buflen);
	if (!buf) {
		DHD_ERROR(("%s failed to allocate read buf\n", __FUNCTION__));
		return;
	}

	rlen = dhd_dbg_pull_from_ring(dhdp, ringid, buf, buflen);

	DHD_DBG_RING_LOCK(ring->lock, flags);
	if (!ring->sched_pull) {
		ring->sched_pull = TRUE;
	}

	hdr = (dhd_dbg_ring_entry_t *)buf;

	while (rlen > 0) {
		ring_status.read_bytes += ENTRY_LENGTH(hdr);
		/* offset fw ts to host ts */
		hdr->timestamp += ring_info->tsoffset;
		debug_data_send(dhdp, ringid, hdr, ENTRY_LENGTH(hdr),
			ring_status);
		rlen -= ENTRY_LENGTH(hdr);
		hdr = (dhd_dbg_ring_entry_t *)((char *)hdr + ENTRY_LENGTH(hdr));
	}
	DHD_DBG_RING_UNLOCK(ring->lock, flags);
	MFREE(dhdp->osh, buf, buflen);

exit:
	if (sched) {
		/* retrigger the work at same interval */
		if ((ring_status.written_bytes == ring_status.read_bytes) &&
				(ring_info->interval)) {
			schedule_delayed_work(d_work, ring_info->interval);
		}
	}
	return;
}

int
dhd_os_dbg_register_callback(int ring_id, dbg_ring_send_sub_t callback)
{
	if (!VALID_RING(ring_id))
		return BCME_RANGE;

	ring_send_sub_cb[ring_id] = callback;
	return BCME_OK;
}

int
dhd_os_dbg_register_urgent_notifier(dhd_pub_t *dhdp, dbg_urgent_noti_sub_t urgent_noti_sub)
{
	if (!dhdp || !urgent_noti_sub)
		return BCME_BADARG;
	urgent_noti_sub_cb = urgent_noti_sub;

	return BCME_OK;
}

int
dhd_os_start_logging(dhd_pub_t *dhdp, char *ring_name, int log_level,
	int flags, int time_intval, int threshold)
{
	int ret = BCME_OK;
	int ring_id;
	linux_dbgring_info_t *os_priv, *ring_info;

	ring_id = dhd_dbg_find_ring_id(dhdp, ring_name);
	if (!VALID_RING(ring_id))
		return BCME_UNSUPPORTED;

	DHD_INFO(("%s , log_level : %d, time_intval : %d, threshod %d Bytes\n",
		__FUNCTION__, log_level, time_intval, threshold));

	/* change the configuration */
	ret = dhd_dbg_set_configuration(dhdp, ring_id, log_level, flags, threshold);
	if (ret) {
		DHD_ERROR(("dhd_set_configuration is failed : %d\n", ret));
		return ret;
	}

	os_priv = dhd_dbg_get_priv(dhdp);
	if (!os_priv)
		return BCME_ERROR;
	ring_info = &os_priv[ring_id];
	ring_info->log_level = log_level;
	if (time_intval == 0 || log_level == 0) {
		ring_info->interval = 0;
		cancel_delayed_work_sync(&ring_info->work);
	} else {
		ring_info->interval = msecs_to_jiffies(time_intval * MSEC_PER_SEC);
		cancel_delayed_work_sync(&ring_info->work);
		schedule_delayed_work(&ring_info->work, ring_info->interval);
	}

	return ret;
}

int
dhd_os_reset_logging(dhd_pub_t *dhdp)
{
	int ret = BCME_OK;
	int ring_id;
	linux_dbgring_info_t *os_priv, *ring_info;

	os_priv = dhd_dbg_get_priv(dhdp);
	if (!os_priv)
		return BCME_ERROR;

	/* Stop all rings */
	for (ring_id = DEBUG_RING_ID_INVALID + 1; ring_id < DEBUG_RING_ID_MAX; ring_id++) {
		DHD_INFO(("%s: Stop ring buffer %d\n", __FUNCTION__, ring_id));

		ring_info = &os_priv[ring_id];
		/* cancel any pending work */
		cancel_delayed_work_sync(&ring_info->work);
		/* log level zero makes stop logging on that ring */
		ring_info->log_level = 0;
		ring_info->interval = 0;
		/* change the configuration */
		ret = dhd_dbg_set_configuration(dhdp, ring_id, 0, 0, 0);
		if (ret) {
			DHD_ERROR(("dhd_set_configuration is failed : %d\n", ret));
			return ret;
		}
	}
	return ret;
}

#define SUPPRESS_LOG_LEVEL 1
int
dhd_os_suppress_logging(dhd_pub_t *dhdp, bool suppress)
{
	int ret = BCME_OK;
	int max_log_level;
	int enable = (suppress) ? 0 : 1;
	linux_dbgring_info_t *os_priv;

	os_priv = dhd_dbg_get_priv(dhdp);
	if (!os_priv)
		return BCME_ERROR;

	max_log_level = os_priv[FW_VERBOSE_RING_ID].log_level;

	if (max_log_level == SUPPRESS_LOG_LEVEL) {
		/* suppress the logging in FW not to wake up host while device in suspend mode */
		ret = dhd_iovar(dhdp, 0, "logtrace", (char *)&enable, sizeof(enable), NULL, 0,
				TRUE);
		if (ret < 0 && (ret != BCME_UNSUPPORTED)) {
			DHD_ERROR(("logtrace is failed : %d\n", ret));
		}
	}

	return ret;
}

int
dhd_os_get_ring_status(dhd_pub_t *dhdp, int ring_id, dhd_dbg_ring_status_t *dbg_ring_status)
{
	return dhd_dbg_get_ring_status(dhdp, ring_id, dbg_ring_status);
}

int
dhd_os_trigger_get_ring_data(dhd_pub_t *dhdp, char *ring_name)
{
	int ret = BCME_OK;
	int ring_id;
	linux_dbgring_info_t *os_priv, *ring_info;
	ring_id = dhd_dbg_find_ring_id(dhdp, ring_name);
	if (!VALID_RING(ring_id))
		return BCME_UNSUPPORTED;
	os_priv = dhd_dbg_get_priv(dhdp);
	if (os_priv) {
		ring_info = &os_priv[ring_id];
		if (ring_info->interval) {
			cancel_delayed_work_sync(&ring_info->work);
		}
		schedule_delayed_work(&ring_info->work, 0);
	} else {
		DHD_ERROR(("%s : os_priv is NULL\n", __FUNCTION__));
		ret = BCME_ERROR;
	}
	return ret;
}

int
dhd_os_push_push_ring_data(dhd_pub_t *dhdp, int ring_id, void *data, int32 data_len)
{
	int ret = BCME_OK, i;
	dhd_dbg_ring_entry_t msg_hdr;
	log_conn_event_t *event_data = (log_conn_event_t *)data;
	linux_dbgring_info_t *os_priv, *ring_info = NULL;

	if (!VALID_RING(ring_id))
		return BCME_UNSUPPORTED;
	os_priv = dhd_dbg_get_priv(dhdp);

	if (os_priv) {
		ring_info = &os_priv[ring_id];
	} else
		return BCME_NORESOURCE;

	memset(&msg_hdr, 0, sizeof(dhd_dbg_ring_entry_t));

	if (ring_id == DHD_EVENT_RING_ID) {
		msg_hdr.type = DBG_RING_ENTRY_EVENT_TYPE;
		msg_hdr.flags |= DBG_RING_ENTRY_FLAGS_HAS_TIMESTAMP;
		msg_hdr.flags |= DBG_RING_ENTRY_FLAGS_HAS_BINARY;
		msg_hdr.timestamp = local_clock();
		/* convert to ms */
		msg_hdr.timestamp = DIV_U64_BY_U32(msg_hdr.timestamp, NSEC_PER_MSEC);
		msg_hdr.len = data_len;
		/* filter the event for higher log level with current log level */
		for (i = 0; i < ARRAYSIZE(dhd_event_map); i++) {
			if ((dhd_event_map[i].tag == event_data->event) &&
				dhd_event_map[i].log_level > ring_info->log_level) {
				return ret;
			}
		}
	} else if (ring_id == FW_VERBOSE_RING_ID) {
		msg_hdr.type = DBG_RING_ENTRY_DATA_TYPE;
		msg_hdr.flags |= DBG_RING_ENTRY_FLAGS_HAS_TIMESTAMP;
		msg_hdr.timestamp = local_clock();
		/* convert to ms */
		msg_hdr.timestamp = DIV_U64_BY_U32(msg_hdr.timestamp, NSEC_PER_MSEC);
		msg_hdr.len = strlen(data);
	} else if (ring_id == DRIVER_LOG_RING_ID) {
		msg_hdr.type = DBG_RING_ENTRY_DATA_TYPE;
		msg_hdr.flags |= DBG_RING_ENTRY_FLAGS_HAS_TIMESTAMP;
		msg_hdr.timestamp = local_clock();
		/* convert to ms */
		msg_hdr.timestamp = DIV_U64_BY_U32(msg_hdr.timestamp, NSEC_PER_MSEC);
		msg_hdr.len = strlen(data);
	} else if (ring_id == ROAM_STATS_RING_ID) {
		msg_hdr.type = DBG_RING_ENTRY_DATA_TYPE;
		msg_hdr.flags |= DBG_RING_ENTRY_FLAGS_HAS_TIMESTAMP;
		msg_hdr.timestamp = local_clock();
		/* convert to ms */
		msg_hdr.timestamp = DIV_U64_BY_U32(msg_hdr.timestamp, NSEC_PER_MSEC);
		msg_hdr.len = strlen(data);
	}
	ret = dhd_dbg_push_to_ring(dhdp, ring_id, &msg_hdr, event_data);
	if (ret && ret != BCME_BUSY) {
		DHD_ERROR(("%s : failed to push data into the ring (%d) with ret(%d)\n",
			__FUNCTION__, ring_id, ret));
	}

	return ret;
}

#ifdef DBG_PKT_MON
int
dhd_os_dbg_attach_pkt_monitor(dhd_pub_t *dhdp)
{
	return dhd_dbg_attach_pkt_monitor(dhdp, dhd_os_dbg_monitor_tx_pkts,
		dhd_os_dbg_monitor_tx_status, dhd_os_dbg_monitor_rx_pkts);
}

int
dhd_os_dbg_start_pkt_monitor(dhd_pub_t *dhdp)
{
	return dhd_dbg_start_pkt_monitor(dhdp);
}

int
dhd_os_dbg_monitor_tx_pkts(dhd_pub_t *dhdp, void *pkt, uint32 pktid)
{
	return dhd_dbg_monitor_tx_pkts(dhdp, pkt, pktid);
}

int
dhd_os_dbg_monitor_tx_status(dhd_pub_t *dhdp, void *pkt, uint32 pktid,
	uint16 status)
{
	return dhd_dbg_monitor_tx_status(dhdp, pkt, pktid, status);
}

int
dhd_os_dbg_monitor_rx_pkts(dhd_pub_t *dhdp, void *pkt)
{
	return dhd_dbg_monitor_rx_pkts(dhdp, pkt);
}

int
dhd_os_dbg_stop_pkt_monitor(dhd_pub_t *dhdp)
{
	return dhd_dbg_stop_pkt_monitor(dhdp);
}

int
dhd_os_dbg_monitor_get_tx_pkts(dhd_pub_t *dhdp, void __user *user_buf,
	uint16 req_count, uint16 *resp_count)
{
	return dhd_dbg_monitor_get_tx_pkts(dhdp, user_buf, req_count, resp_count);
}

int
dhd_os_dbg_monitor_get_rx_pkts(dhd_pub_t *dhdp, void __user *user_buf,
	uint16 req_count, uint16 *resp_count)
{
	return dhd_dbg_monitor_get_rx_pkts(dhdp, user_buf, req_count, resp_count);
}

int
dhd_os_dbg_detach_pkt_monitor(dhd_pub_t *dhdp)
{
	return dhd_dbg_detach_pkt_monitor(dhdp);
}
#endif /* DBG_PKT_MON */

int
dhd_os_dbg_get_feature(dhd_pub_t *dhdp, int32 *features)
{
	int ret = BCME_OK;
	/* XXX : we need to find a way to get the features for dbg */
	*features = 0;
#ifdef DEBUGABILITY
#ifdef BRCM_EWP
	*features |= DBG_MEMORY_DUMP_SUPPORTED;
#endif /* BRCM_EWP */
	if (FW_SUPPORTED(dhdp, logtrace)) {
		*features |= DBG_CONNECT_EVENT_SUPPORTED;
		*features |= DBG_VERBOSE_LOG_SUPPORTED;
	}
	if (FW_SUPPORTED(dhdp, hchk)) {
		*features |= DBG_HEALTH_CHECK_SUPPORTED;
	}
#ifdef DBG_PKT_MON
	if (FW_SUPPORTED(dhdp, d11status)) {
		*features |= DBG_PACKET_FATE_SUPPORTED;
	}
#endif /* DBG_PKT_MON */
#endif /* DEBUGABILITY */
	return ret;
}

static void
dhd_os_dbg_pullreq(void *os_priv, int ring_id)
{
	linux_dbgring_info_t *ring_info;

	ring_info = &((linux_dbgring_info_t *)os_priv)[ring_id];
	cancel_delayed_work(&ring_info->work);
	schedule_delayed_work(&ring_info->work, 0);
}

int
dhd_os_dbg_attach(dhd_pub_t *dhdp)
{
	int ret = BCME_OK;
	linux_dbgring_info_t *os_priv, *ring_info;
	int ring_id;

	/* os_dbg data */
	os_priv = MALLOCZ(dhdp->osh, sizeof(*os_priv) * DEBUG_RING_ID_MAX);
	if (!os_priv)
		return BCME_NOMEM;

	for (ring_id = DEBUG_RING_ID_INVALID + 1; ring_id < DEBUG_RING_ID_MAX;
	     ring_id++) {
		ring_info = &os_priv[ring_id];
		INIT_DELAYED_WORK(&ring_info->work, dbg_ring_poll_worker);
		ring_info->dhdp = dhdp;
		ring_info->ring_id = ring_id;
	}

	ret = dhd_dbg_attach(dhdp, dhd_os_dbg_pullreq, dhd_os_dbg_urgent_notifier, os_priv);
	if (ret)
		MFREE(dhdp->osh, os_priv, sizeof(*os_priv) * DEBUG_RING_ID_MAX);

	return ret;
}

void
dhd_os_dbg_detach(dhd_pub_t *dhdp)
{
	linux_dbgring_info_t *os_priv, *ring_info;
	int ring_id;
	/* free os_dbg data */
	os_priv = dhd_dbg_get_priv(dhdp);
	if (!os_priv)
		return;
	/* abort pending any job */
	for (ring_id = DEBUG_RING_ID_INVALID + 1; ring_id < DEBUG_RING_ID_MAX; ring_id++) {
		ring_info = &os_priv[ring_id];
		if (ring_info->interval) {
			ring_info->interval = 0;
			cancel_delayed_work_sync(&ring_info->work);
		}
	}
	MFREE(dhdp->osh, os_priv, sizeof(*os_priv) * DEBUG_RING_ID_MAX);

	return dhd_dbg_detach(dhdp);
}