[linux.git] / drivers / net / ethernet / broadcom / bnxt / bnxt_ulp.c

/* Broadcom NetXtreme-C/E network driver.
 *
 * Copyright (c) 2016-2018 Broadcom Limited
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 */

#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/bitops.h>
#include <linux/irq.h>
#include <asm/byteorder.h>
#include <linux/bitmap.h>

#include "bnxt_hsi.h"
#include "bnxt.h"
#include "bnxt_ulp.h"

static int bnxt_register_dev(struct bnxt_en_dev *edev, int ulp_id,
			     struct bnxt_ulp_ops *ulp_ops, void *handle)
{
	struct net_device *dev = edev->net;
	struct bnxt *bp = netdev_priv(dev);
	struct bnxt_ulp *ulp;

	ASSERT_RTNL();
	if (ulp_id >= BNXT_MAX_ULP)
		return -EINVAL;

	ulp = &edev->ulp_tbl[ulp_id];
	if (rcu_access_pointer(ulp->ulp_ops)) {
		netdev_err(bp->dev, "ulp id %d already registered\n", ulp_id);
		return -EBUSY;
	}
	if (ulp_id == BNXT_ROCE_ULP) {
		unsigned int max_stat_ctxs;

		if (bp->flags & BNXT_FLAG_CHIP_P5)
			return -EOPNOTSUPP;

		max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
		if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS ||
		    bp->num_stat_ctxs == max_stat_ctxs)
			return -ENOMEM;
		bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs -
					    BNXT_MIN_ROCE_STAT_CTXS);
	}

	atomic_set(&ulp->ref_count, 0);
	ulp->handle = handle;
	rcu_assign_pointer(ulp->ulp_ops, ulp_ops);

	if (ulp_id == BNXT_ROCE_ULP) {
		if (test_bit(BNXT_STATE_OPEN, &bp->state))
			bnxt_hwrm_vnic_cfg(bp, 0);
	}

	return 0;
}

static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
{
	struct net_device *dev = edev->net;
	struct bnxt *bp = netdev_priv(dev);
	struct bnxt_ulp *ulp;
	int i = 0;

	ASSERT_RTNL();
	if (ulp_id >= BNXT_MAX_ULP)
		return -EINVAL;

	ulp = &edev->ulp_tbl[ulp_id];
	if (!rcu_access_pointer(ulp->ulp_ops)) {
		netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id);
		return -EINVAL;
	}
	if (ulp_id == BNXT_ROCE_ULP) {
		unsigned int max_stat_ctxs;

		max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
		bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs + 1);
		if (ulp->msix_requested)
			edev->en_ops->bnxt_free_msix(edev, ulp_id);
	}
	if (ulp->max_async_event_id)
		bnxt_hwrm_func_rgtr_async_events(bp, NULL, 0);

	RCU_INIT_POINTER(ulp->ulp_ops, NULL);
	synchronize_rcu();
	ulp->max_async_event_id = 0;
	ulp->async_events_bmap = NULL;
	while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
		msleep(100);
		i++;
	}
	return 0;
}

static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
{
	struct bnxt_en_dev *edev = bp->edev;
	int num_msix, idx, i;

	num_msix = edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
	idx = edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
	for (i = 0; i < num_msix; i++) {
		ent[i].vector = bp->irq_tbl[idx + i].vector;
		ent[i].ring_idx = idx + i;
		ent[i].db_offset = (idx + i) * 0x80;
	}
}

static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
			      struct bnxt_msix_entry *ent, int num_msix)
{
	struct net_device *dev = edev->net;
	struct bnxt *bp = netdev_priv(dev);
	int max_idx, max_cp_rings;
	int avail_msix, idx;
	int rc = 0;

	ASSERT_RTNL();
	if (ulp_id != BNXT_ROCE_ULP)
		return -EINVAL;

	if (!(bp->flags & BNXT_FLAG_USING_MSIX))
		return -ENODEV;

	if (edev->ulp_tbl[ulp_id].msix_requested)
		return -EAGAIN;

	max_cp_rings = bnxt_get_max_func_cp_rings(bp);
	avail_msix = bnxt_get_avail_msix(bp, num_msix);
	if (!avail_msix)
		return -ENOMEM;
	if (avail_msix > num_msix)
		avail_msix = num_msix;

	if (BNXT_NEW_RM(bp)) {
		idx = bp->cp_nr_rings;
	} else {
		max_idx = min_t(int, bp->total_irqs, max_cp_rings);
		idx = max_idx - avail_msix;
	}
	edev->ulp_tbl[ulp_id].msix_base = idx;
	edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
	if (bp->total_irqs < (idx + avail_msix)) {
		if (netif_running(dev)) {
			bnxt_close_nic(bp, true, false);
			rc = bnxt_open_nic(bp, true, false);
		} else {
			rc = bnxt_reserve_rings(bp);
		}
	}
	if (rc) {
		edev->ulp_tbl[ulp_id].msix_requested = 0;
		return -EAGAIN;
	}

	if (BNXT_NEW_RM(bp)) {
		struct bnxt_hw_resc *hw_resc = &bp->hw_resc;

		avail_msix = hw_resc->resv_cp_rings - bp->cp_nr_rings;
		edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
	}
	bnxt_fill_msix_vecs(bp, ent);
	edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
	return avail_msix;
}

static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
{
	struct net_device *dev = edev->net;
	struct bnxt *bp = netdev_priv(dev);

	ASSERT_RTNL();
	if (ulp_id != BNXT_ROCE_ULP)
		return -EINVAL;

	if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
		return 0;

	edev->ulp_tbl[ulp_id].msix_requested = 0;
	edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
	if (netif_running(dev)) {
		bnxt_close_nic(bp, true, false);
		bnxt_open_nic(bp, true, false);
	}
	return 0;
}

int bnxt_get_ulp_msix_num(struct bnxt *bp)
{
	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
		struct bnxt_en_dev *edev = bp->edev;

		return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
	}
	return 0;
}

int bnxt_get_ulp_msix_base(struct bnxt *bp)
{
	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
		struct bnxt_en_dev *edev = bp->edev;

		if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
			return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
	}
	return 0;
}

static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
			 struct bnxt_fw_msg *fw_msg)
{
	struct net_device *dev = edev->net;
	struct bnxt *bp = netdev_priv(dev);
	struct input *req;
	int rc;

	mutex_lock(&bp->hwrm_cmd_lock);
	req = fw_msg->msg;
	req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
	rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
				fw_msg->timeout);
	if (!rc) {
		struct output *resp = bp->hwrm_cmd_resp_addr;
		u32 len = le16_to_cpu(resp->resp_len);

		if (fw_msg->resp_max_len < len)
			len = fw_msg->resp_max_len;

		memcpy(fw_msg->resp, resp, len);
	}
	mutex_unlock(&bp->hwrm_cmd_lock);
	return rc;
}

static void bnxt_ulp_get(struct bnxt_ulp *ulp)
{
	atomic_inc(&ulp->ref_count);
}

static void bnxt_ulp_put(struct bnxt_ulp *ulp)
{
	atomic_dec(&ulp->ref_count);
}

void bnxt_ulp_stop(struct bnxt *bp)
{
	struct bnxt_en_dev *edev = bp->edev;
	struct bnxt_ulp_ops *ops;
	int i;

	if (!edev)
		return;

	for (i = 0; i < BNXT_MAX_ULP; i++) {
		struct bnxt_ulp *ulp = &edev->ulp_tbl[i];

		ops = rtnl_dereference(ulp->ulp_ops);
		if (!ops || !ops->ulp_stop)
			continue;
		ops->ulp_stop(ulp->handle);
	}
}

void bnxt_ulp_start(struct bnxt *bp)
{
	struct bnxt_en_dev *edev = bp->edev;
	struct bnxt_ulp_ops *ops;
	int i;

	if (!edev)
		return;

	for (i = 0; i < BNXT_MAX_ULP; i++) {
		struct bnxt_ulp *ulp = &edev->ulp_tbl[i];

		ops = rtnl_dereference(ulp->ulp_ops);
		if (!ops || !ops->ulp_start)
			continue;
		ops->ulp_start(ulp->handle);
	}
}

void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
{
	struct bnxt_en_dev *edev = bp->edev;
	struct bnxt_ulp_ops *ops;
	int i;

	if (!edev)
		return;

	for (i = 0; i < BNXT_MAX_ULP; i++) {
		struct bnxt_ulp *ulp = &edev->ulp_tbl[i];

		rcu_read_lock();
		ops = rcu_dereference(ulp->ulp_ops);
		if (!ops || !ops->ulp_sriov_config) {
			rcu_read_unlock();
			continue;
		}
		bnxt_ulp_get(ulp);
		rcu_read_unlock();
		ops->ulp_sriov_config(ulp->handle, num_vfs);
		bnxt_ulp_put(ulp);
	}
}

void bnxt_ulp_shutdown(struct bnxt *bp)
{
	struct bnxt_en_dev *edev = bp->edev;
	struct bnxt_ulp_ops *ops;
	int i;

	if (!edev)
		return;

	for (i = 0; i < BNXT_MAX_ULP; i++) {
		struct bnxt_ulp *ulp = &edev->ulp_tbl[i];

		ops = rtnl_dereference(ulp->ulp_ops);
		if (!ops || !ops->ulp_shutdown)
			continue;
		ops->ulp_shutdown(ulp->handle);
	}
}

void bnxt_ulp_irq_stop(struct bnxt *bp)
{
	struct bnxt_en_dev *edev = bp->edev;
	struct bnxt_ulp_ops *ops;

	if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
		return;

	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
		struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];

		if (!ulp->msix_requested)
			return;

		ops = rtnl_dereference(ulp->ulp_ops);
		if (!ops || !ops->ulp_irq_stop)
			return;
		ops->ulp_irq_stop(ulp->handle);
	}
}

void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
{
	struct bnxt_en_dev *edev = bp->edev;
	struct bnxt_ulp_ops *ops;

	if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
		return;

	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
		struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
		struct bnxt_msix_entry *ent = NULL;

		if (!ulp->msix_requested)
			return;

		ops = rtnl_dereference(ulp->ulp_ops);
		if (!ops || !ops->ulp_irq_restart)
			return;

		if (!err) {
			ent = kcalloc(ulp->msix_requested, sizeof(*ent),
				      GFP_KERNEL);
			if (!ent)
				return;
			bnxt_fill_msix_vecs(bp, ent);
		}
		ops->ulp_irq_restart(ulp->handle, ent);
		kfree(ent);
	}
}

void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
{
	u16 event_id = le16_to_cpu(cmpl->event_id);
	struct bnxt_en_dev *edev = bp->edev;
	struct bnxt_ulp_ops *ops;
	int i;

	if (!edev)
		return;

	rcu_read_lock();
	for (i = 0; i < BNXT_MAX_ULP; i++) {
		struct bnxt_ulp *ulp = &edev->ulp_tbl[i];

		ops = rcu_dereference(ulp->ulp_ops);
		if (!ops || !ops->ulp_async_notifier)
			continue;
		if (!ulp->async_events_bmap ||
		    event_id > ulp->max_async_event_id)
			continue;

		/* Read max_async_event_id first before testing the bitmap. */
		smp_rmb();
		if (test_bit(event_id, ulp->async_events_bmap))
			ops->ulp_async_notifier(ulp->handle, cmpl);
	}
	rcu_read_unlock();
}

static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
				      unsigned long *events_bmap, u16 max_id)
{
	struct net_device *dev = edev->net;
	struct bnxt *bp = netdev_priv(dev);
	struct bnxt_ulp *ulp;

	if (ulp_id >= BNXT_MAX_ULP)
		return -EINVAL;

	ulp = &edev->ulp_tbl[ulp_id];
	ulp->async_events_bmap = events_bmap;
	/* Make sure bnxt_ulp_async_events() sees this order */
	smp_wmb();
	ulp->max_async_event_id = max_id;
	bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
	return 0;
}

static const struct bnxt_en_ops bnxt_en_ops_tbl = {
	.bnxt_register_device	= bnxt_register_dev,
	.bnxt_unregister_device	= bnxt_unregister_dev,
	.bnxt_request_msix	= bnxt_req_msix_vecs,
	.bnxt_free_msix		= bnxt_free_msix_vecs,
	.bnxt_send_fw_msg	= bnxt_send_msg,
	.bnxt_register_fw_async_events	= bnxt_register_async_events,
};

struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev)
{
	struct bnxt *bp = netdev_priv(dev);
	struct bnxt_en_dev *edev;

	edev = bp->edev;
	if (!edev) {
		edev = kzalloc(sizeof(*edev), GFP_KERNEL);
		if (!edev)
			return ERR_PTR(-ENOMEM);
		edev->en_ops = &bnxt_en_ops_tbl;
		if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
			edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
		if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
			edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
		edev->net = dev;
		edev->pdev = bp->pdev;
		bp->edev = edev;
	}
	return bp->edev;
}
Commit	Line	Data
a588e458 MC	1	/* Broadcom NetXtreme-C/E network driver.
a588e458 MC	2	*
ec86f14e	3	* Copyright (c) 2016-2018 Broadcom Limited
a588e458 MC	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation.
	8	*/
	9
	10	#include <linux/module.h>
	11
	12	#include <linux/kernel.h>
	13	#include <linux/errno.h>
	14	#include <linux/interrupt.h>
	15	#include <linux/pci.h>
	16	#include <linux/netdevice.h>
	17	#include <linux/rtnetlink.h>
	18	#include <linux/bitops.h>
	19	#include <linux/irq.h>
	20	#include <asm/byteorder.h>
	21	#include <linux/bitmap.h>
	22
	23	#include "bnxt_hsi.h"
	24	#include "bnxt.h"
	25	#include "bnxt_ulp.h"
	26
	27	static int bnxt_register_dev(struct bnxt_en_dev *edev, int ulp_id,
	28	struct bnxt_ulp_ops ulp_ops, void handle)
	29	{
	30	struct net_device *dev = edev->net;
	31	struct bnxt *bp = netdev_priv(dev);
	32	struct bnxt_ulp *ulp;
	33
	34	ASSERT_RTNL();
	35	if (ulp_id >= BNXT_MAX_ULP)
	36	return -EINVAL;
	37
	38	ulp = &edev->ulp_tbl[ulp_id];
	39	if (rcu_access_pointer(ulp->ulp_ops)) {
	40	netdev_err(bp->dev, "ulp id %d already registered\n", ulp_id);
	41	return -EBUSY;
	42	}
	43	if (ulp_id == BNXT_ROCE_ULP) {
	44	unsigned int max_stat_ctxs;
	45
addd4df6 MC	46	if (bp->flags & BNXT_FLAG_CHIP_P5)
	47	return -EOPNOTSUPP;
	48
a588e458 MC	49	max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
	50	if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS \|\|
	51	bp->num_stat_ctxs == max_stat_ctxs)
	52	return -ENOMEM;
	53	bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs -
	54	BNXT_MIN_ROCE_STAT_CTXS);
	55	}
	56
	57	atomic_set(&ulp->ref_count, 0);
	58	ulp->handle = handle;
	59	rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
	60
	61	if (ulp_id == BNXT_ROCE_ULP) {
	62	if (test_bit(BNXT_STATE_OPEN, &bp->state))
	63	bnxt_hwrm_vnic_cfg(bp, 0);
	64	}
	65
	66	return 0;
	67	}
	68
	69	static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
	70	{
	71	struct net_device *dev = edev->net;
	72	struct bnxt *bp = netdev_priv(dev);
	73	struct bnxt_ulp *ulp;
	74	int i = 0;
	75
	76	ASSERT_RTNL();
	77	if (ulp_id >= BNXT_MAX_ULP)
	78	return -EINVAL;
	79
	80	ulp = &edev->ulp_tbl[ulp_id];
	81	if (!rcu_access_pointer(ulp->ulp_ops)) {
	82	netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id);
	83	return -EINVAL;
	84	}
	85	if (ulp_id == BNXT_ROCE_ULP) {
	86	unsigned int max_stat_ctxs;
	87
	88	max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
	89	bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs + 1);
146ed3c5 MC	90	if (ulp->msix_requested)
146ed3c5 MC	91	edev->en_ops->bnxt_free_msix(edev, ulp_id);
a588e458 MC	92	}
	93	if (ulp->max_async_event_id)
	94	bnxt_hwrm_func_rgtr_async_events(bp, NULL, 0);
	95
	96	RCU_INIT_POINTER(ulp->ulp_ops, NULL);
	97	synchronize_rcu();
	98	ulp->max_async_event_id = 0;
	99	ulp->async_events_bmap = NULL;
	100	while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
	101	msleep(100);
	102	i++;
	103	}
	104	return 0;
	105	}
	106
ec86f14e MC	107	static void bnxt_fill_msix_vecs(struct bnxt bp, struct bnxt_msix_entry ent)
	108	{
	109	struct bnxt_en_dev *edev = bp->edev;
	110	int num_msix, idx, i;
	111
	112	num_msix = edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
	113	idx = edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
	114	for (i = 0; i < num_msix; i++) {
	115	ent[i].vector = bp->irq_tbl[idx + i].vector;
	116	ent[i].ring_idx = idx + i;
	117	ent[i].db_offset = (idx + i) * 0x80;
	118	}
	119	}
	120
a588e458 MC	121	static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
	122	struct bnxt_msix_entry *ent, int num_msix)
	123	{
	124	struct net_device *dev = edev->net;
	125	struct bnxt *bp = netdev_priv(dev);
	126	int max_idx, max_cp_rings;
ec86f14e	127	int avail_msix, idx;
fbcfc8e4	128	int rc = 0;
a588e458 MC	129
	130	ASSERT_RTNL();
	131	if (ulp_id != BNXT_ROCE_ULP)
	132	return -EINVAL;
	133
	134	if (!(bp->flags & BNXT_FLAG_USING_MSIX))
	135	return -ENODEV;
	136
08654eb2 MC	137	if (edev->ulp_tbl[ulp_id].msix_requested)
	138	return -EAGAIN;
	139
a588e458	140	max_cp_rings = bnxt_get_max_func_cp_rings(bp);
fbcfc8e4	141	avail_msix = bnxt_get_avail_msix(bp, num_msix);
a588e458 MC	142	if (!avail_msix)
	143	return -ENOMEM;
	144	if (avail_msix > num_msix)
	145	avail_msix = num_msix;
	146
f1ca94de	147	if (BNXT_NEW_RM(bp)) {
08654eb2	148	idx = bp->cp_nr_rings;
fbcfc8e4 MC	149	} else {
fbcfc8e4 MC	150	max_idx = min_t(int, bp->total_irqs, max_cp_rings);
08654eb2	151	idx = max_idx - avail_msix;
fbcfc8e4	152	}
08654eb2	153	edev->ulp_tbl[ulp_id].msix_base = idx;
fbcfc8e4 MC	154	edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
	155	if (bp->total_irqs < (idx + avail_msix)) {
	156	if (netif_running(dev)) {
	157	bnxt_close_nic(bp, true, false);
	158	rc = bnxt_open_nic(bp, true, false);
	159	} else {
	160	rc = bnxt_reserve_rings(bp);
	161	}
	162	}
	163	if (rc) {
	164	edev->ulp_tbl[ulp_id].msix_requested = 0;
	165	return -EAGAIN;
	166	}
	167
f1ca94de	168	if (BNXT_NEW_RM(bp)) {
fbcfc8e4 MC	169	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
	170
	171	avail_msix = hw_resc->resv_cp_rings - bp->cp_nr_rings;
	172	edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
	173	}
ec86f14e	174	bnxt_fill_msix_vecs(bp, ent);
ec86f14e	175	edev->flags \|= BNXT_EN_FLAG_MSIX_REQUESTED;
a588e458 MC	176	return avail_msix;
	177	}
	178
	179	static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
	180	{
	181	struct net_device *dev = edev->net;
	182	struct bnxt *bp = netdev_priv(dev);
a588e458 MC	183
	184	ASSERT_RTNL();
	185	if (ulp_id != BNXT_ROCE_ULP)
	186	return -EINVAL;
	187
ec86f14e MC	188	if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
	189	return 0;
	190
a588e458	191	edev->ulp_tbl[ulp_id].msix_requested = 0;
ec86f14e	192	edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
fbcfc8e4 MC	193	if (netif_running(dev)) {
	194	bnxt_close_nic(bp, true, false);
	195	bnxt_open_nic(bp, true, false);
	196	}
a588e458 MC	197	return 0;
	198	}
	199
08654eb2 MC	200	int bnxt_get_ulp_msix_num(struct bnxt *bp)
	201	{
	202	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	203	struct bnxt_en_dev *edev = bp->edev;
	204
	205	return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
	206	}
	207	return 0;
	208	}
	209
	210	int bnxt_get_ulp_msix_base(struct bnxt *bp)
	211	{
	212	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	213	struct bnxt_en_dev *edev = bp->edev;
	214
	215	if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
	216	return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
	217	}
	218	return 0;
	219	}
	220
a588e458 MC	221	static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
	222	struct bnxt_fw_msg *fw_msg)
	223	{
	224	struct net_device *dev = edev->net;
	225	struct bnxt *bp = netdev_priv(dev);
	226	struct input *req;
	227	int rc;
	228
	229	mutex_lock(&bp->hwrm_cmd_lock);
	230	req = fw_msg->msg;
	231	req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
	232	rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
	233	fw_msg->timeout);
	234	if (!rc) {
	235	struct output *resp = bp->hwrm_cmd_resp_addr;
	236	u32 len = le16_to_cpu(resp->resp_len);
	237
	238	if (fw_msg->resp_max_len < len)
	239	len = fw_msg->resp_max_len;
	240
	241	memcpy(fw_msg->resp, resp, len);
	242	}
	243	mutex_unlock(&bp->hwrm_cmd_lock);
	244	return rc;
	245	}
	246
	247	static void bnxt_ulp_get(struct bnxt_ulp *ulp)
	248	{
	249	atomic_inc(&ulp->ref_count);
	250	}
	251
	252	static void bnxt_ulp_put(struct bnxt_ulp *ulp)
	253	{
	254	atomic_dec(&ulp->ref_count);
	255	}
	256
	257	void bnxt_ulp_stop(struct bnxt *bp)
	258	{
	259	struct bnxt_en_dev *edev = bp->edev;
	260	struct bnxt_ulp_ops *ops;
	261	int i;
	262
	263	if (!edev)
	264	return;
	265
	266	for (i = 0; i < BNXT_MAX_ULP; i++) {
	267	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	268
	269	ops = rtnl_dereference(ulp->ulp_ops);
	270	if (!ops \|\| !ops->ulp_stop)
	271	continue;
	272	ops->ulp_stop(ulp->handle);
	273	}
	274	}
	275
	276	void bnxt_ulp_start(struct bnxt *bp)
	277	{
	278	struct bnxt_en_dev *edev = bp->edev;
	279	struct bnxt_ulp_ops *ops;
	280	int i;
	281
	282	if (!edev)
	283	return;
	284
285	for (i = 0; i < BNXT_MAX_ULP; i++) {
286	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
287
288	ops = rtnl_dereference(ulp->ulp_ops);
289	if (!ops \|\| !ops->ulp_start)
290	continue;
291	ops->ulp_start(ulp->handle);
292	}
293	}
294
295	void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
296	{
297	struct bnxt_en_dev *edev = bp->edev;
298	struct bnxt_ulp_ops *ops;
299	int i;
300
301	if (!edev)
302	return;
303
304	for (i = 0; i < BNXT_MAX_ULP; i++) {
305	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
306
307	rcu_read_lock();
308	ops = rcu_dereference(ulp->ulp_ops);
309	if (!ops \|\| !ops->ulp_sriov_config) {
310	rcu_read_unlock();
311	continue;
312	}
313	bnxt_ulp_get(ulp);
314	rcu_read_unlock();
315	ops->ulp_sriov_config(ulp->handle, num_vfs);
316	bnxt_ulp_put(ulp);
317	}
318	}
319
0efd2fc6 MC	320	void bnxt_ulp_shutdown(struct bnxt *bp)
	321	{
	322	struct bnxt_en_dev *edev = bp->edev;
	323	struct bnxt_ulp_ops *ops;
	324	int i;
	325
	326	if (!edev)
	327	return;
	328
	329	for (i = 0; i < BNXT_MAX_ULP; i++) {
	330	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	331
	332	ops = rtnl_dereference(ulp->ulp_ops);
	333	if (!ops \|\| !ops->ulp_shutdown)
	334	continue;
	335	ops->ulp_shutdown(ulp->handle);
	336	}
	337	}
	338
ec86f14e MC	339	void bnxt_ulp_irq_stop(struct bnxt *bp)
	340	{
	341	struct bnxt_en_dev *edev = bp->edev;
	342	struct bnxt_ulp_ops *ops;
	343
	344	if (!edev \|\| !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
	345	return;
	346
	347	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	348	struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
	349
	350	if (!ulp->msix_requested)
	351	return;
	352
	353	ops = rtnl_dereference(ulp->ulp_ops);
	354	if (!ops \|\| !ops->ulp_irq_stop)
	355	return;
	356	ops->ulp_irq_stop(ulp->handle);
	357	}
	358	}
	359
	360	void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
	361	{
	362	struct bnxt_en_dev *edev = bp->edev;
	363	struct bnxt_ulp_ops *ops;
	364
	365	if (!edev \|\| !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
	366	return;
	367
	368	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	369	struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
	370	struct bnxt_msix_entry *ent = NULL;
	371
	372	if (!ulp->msix_requested)
	373	return;
	374
	375	ops = rtnl_dereference(ulp->ulp_ops);
	376	if (!ops \|\| !ops->ulp_irq_restart)
	377	return;
	378
	379	if (!err) {
	380	ent = kcalloc(ulp->msix_requested, sizeof(*ent),
	381	GFP_KERNEL);
	382	if (!ent)
	383	return;
	384	bnxt_fill_msix_vecs(bp, ent);
	385	}
	386	ops->ulp_irq_restart(ulp->handle, ent);
	387	kfree(ent);
	388	}
	389	}
	390
a588e458 MC	391	void bnxt_ulp_async_events(struct bnxt bp, struct hwrm_async_event_cmpl cmpl)
	392	{
	393	u16 event_id = le16_to_cpu(cmpl->event_id);
	394	struct bnxt_en_dev *edev = bp->edev;
	395	struct bnxt_ulp_ops *ops;
	396	int i;
	397
	398	if (!edev)
	399	return;
	400
	401	rcu_read_lock();
	402	for (i = 0; i < BNXT_MAX_ULP; i++) {
	403	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	404
	405	ops = rcu_dereference(ulp->ulp_ops);
	406	if (!ops \|\| !ops->ulp_async_notifier)
	407	continue;
	408	if (!ulp->async_events_bmap \|\|
	409	event_id > ulp->max_async_event_id)
	410	continue;
	411
	412	/* Read max_async_event_id first before testing the bitmap. */
	413	smp_rmb();
	414	if (test_bit(event_id, ulp->async_events_bmap))
	415	ops->ulp_async_notifier(ulp->handle, cmpl);
	416	}
	417	rcu_read_unlock();
	418	}
	419
	420	static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
	421	unsigned long *events_bmap, u16 max_id)
	422	{
	423	struct net_device *dev = edev->net;
	424	struct bnxt *bp = netdev_priv(dev);
	425	struct bnxt_ulp *ulp;
	426
	427	if (ulp_id >= BNXT_MAX_ULP)
	428	return -EINVAL;
	429
	430	ulp = &edev->ulp_tbl[ulp_id];
	431	ulp->async_events_bmap = events_bmap;
	432	/* Make sure bnxt_ulp_async_events() sees this order */
	433	smp_wmb();
	434	ulp->max_async_event_id = max_id;
	435	bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
	436	return 0;
	437	}
	438
	439	static const struct bnxt_en_ops bnxt_en_ops_tbl = {
	440	.bnxt_register_device = bnxt_register_dev,
	441	.bnxt_unregister_device = bnxt_unregister_dev,
	442	.bnxt_request_msix = bnxt_req_msix_vecs,
	443	.bnxt_free_msix = bnxt_free_msix_vecs,
	444	.bnxt_send_fw_msg = bnxt_send_msg,
	445	.bnxt_register_fw_async_events = bnxt_register_async_events,
	446	};
	447
	448	struct bnxt_en_dev bnxt_ulp_probe(struct net_device dev)
	449	{
	450	struct bnxt *bp = netdev_priv(dev);
	451	struct bnxt_en_dev *edev;
	452
	453	edev = bp->edev;
	454	if (!edev) {
455	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
456	if (!edev)
457	return ERR_PTR(-ENOMEM);
458	edev->en_ops = &bnxt_en_ops_tbl;
459	if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
460	edev->flags \|= BNXT_EN_FLAG_ROCEV1_CAP;
461	if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
462	edev->flags \|= BNXT_EN_FLAG_ROCEV2_CAP;
463	edev->net = dev;
464	edev->pdev = bp->pdev;
465	bp->edev = edev;
466	}
467	return bp->edev;
468	}