[mirror_ubuntu-disco-kernel.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->cp_nr_rings == max_stat_ctxs)
			return -ENOMEM;
	}

	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 && 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, true);
		}
	}
	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_irqs - 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;
}

int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
{
	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP))
		return BNXT_MIN_ROCE_STAT_CTXS;

	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);
a588e458 MC	50	if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS \|\|
c027c6b4	51	bp->cp_nr_rings == max_stat_ctxs)
a588e458	52	return -ENOMEM;
a588e458 MC	53	}
	54
	55	atomic_set(&ulp->ref_count, 0);
	56	ulp->handle = handle;
	57	rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
	58
	59	if (ulp_id == BNXT_ROCE_ULP) {
	60	if (test_bit(BNXT_STATE_OPEN, &bp->state))
	61	bnxt_hwrm_vnic_cfg(bp, 0);
	62	}
	63
	64	return 0;
	65	}
	66
	67	static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
	68	{
	69	struct net_device *dev = edev->net;
	70	struct bnxt *bp = netdev_priv(dev);
	71	struct bnxt_ulp *ulp;
	72	int i = 0;
	73
	74	ASSERT_RTNL();
	75	if (ulp_id >= BNXT_MAX_ULP)
	76	return -EINVAL;
	77
	78	ulp = &edev->ulp_tbl[ulp_id];
	79	if (!rcu_access_pointer(ulp->ulp_ops)) {
	80	netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id);
	81	return -EINVAL;
	82	}
f4e89614 VV	83	if (ulp_id == BNXT_ROCE_ULP && ulp->msix_requested)
f4e89614 VV	84	edev->en_ops->bnxt_free_msix(edev, ulp_id);
a588e458	85
a588e458 MC	86	if (ulp->max_async_event_id)
	87	bnxt_hwrm_func_rgtr_async_events(bp, NULL, 0);
	88
	89	RCU_INIT_POINTER(ulp->ulp_ops, NULL);
	90	synchronize_rcu();
	91	ulp->max_async_event_id = 0;
	92	ulp->async_events_bmap = NULL;
	93	while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
	94	msleep(100);
	95	i++;
	96	}
	97	return 0;
	98	}
	99
ec86f14e MC	100	static void bnxt_fill_msix_vecs(struct bnxt bp, struct bnxt_msix_entry ent)
	101	{
	102	struct bnxt_en_dev *edev = bp->edev;
	103	int num_msix, idx, i;
	104
	105	num_msix = edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
	106	idx = edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
	107	for (i = 0; i < num_msix; i++) {
	108	ent[i].vector = bp->irq_tbl[idx + i].vector;
	109	ent[i].ring_idx = idx + i;
	110	ent[i].db_offset = (idx + i) * 0x80;
	111	}
	112	}
	113
a588e458 MC	114	static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
	115	struct bnxt_msix_entry *ent, int num_msix)
	116	{
	117	struct net_device *dev = edev->net;
	118	struct bnxt *bp = netdev_priv(dev);
	119	int max_idx, max_cp_rings;
ec86f14e	120	int avail_msix, idx;
fbcfc8e4	121	int rc = 0;
a588e458 MC	122
	123	ASSERT_RTNL();
	124	if (ulp_id != BNXT_ROCE_ULP)
	125	return -EINVAL;
	126
	127	if (!(bp->flags & BNXT_FLAG_USING_MSIX))
	128	return -ENODEV;
	129
08654eb2 MC	130	if (edev->ulp_tbl[ulp_id].msix_requested)
	131	return -EAGAIN;
	132
a588e458	133	max_cp_rings = bnxt_get_max_func_cp_rings(bp);
fbcfc8e4	134	avail_msix = bnxt_get_avail_msix(bp, num_msix);
a588e458 MC	135	if (!avail_msix)
	136	return -ENOMEM;
	137	if (avail_msix > num_msix)
	138	avail_msix = num_msix;
	139
f1ca94de	140	if (BNXT_NEW_RM(bp)) {
08654eb2	141	idx = bp->cp_nr_rings;
fbcfc8e4 MC	142	} else {
fbcfc8e4 MC	143	max_idx = min_t(int, bp->total_irqs, max_cp_rings);
08654eb2	144	idx = max_idx - avail_msix;
fbcfc8e4	145	}
08654eb2	146	edev->ulp_tbl[ulp_id].msix_base = idx;
fbcfc8e4 MC	147	edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
	148	if (bp->total_irqs < (idx + avail_msix)) {
	149	if (netif_running(dev)) {
	150	bnxt_close_nic(bp, true, false);
	151	rc = bnxt_open_nic(bp, true, false);
	152	} else {
46d06c7c	153	rc = bnxt_reserve_rings(bp, true);
fbcfc8e4 MC	154	}
	155	}
	156	if (rc) {
	157	edev->ulp_tbl[ulp_id].msix_requested = 0;
	158	return -EAGAIN;
	159	}
	160
f1ca94de	161	if (BNXT_NEW_RM(bp)) {
fbcfc8e4 MC	162	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
fbcfc8e4 MC	163
75720e63	164	avail_msix = hw_resc->resv_irqs - bp->cp_nr_rings;
fbcfc8e4 MC	165	edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
fbcfc8e4 MC	166	}
ec86f14e	167	bnxt_fill_msix_vecs(bp, ent);
ec86f14e	168	edev->flags \|= BNXT_EN_FLAG_MSIX_REQUESTED;
a588e458 MC	169	return avail_msix;
	170	}
	171
	172	static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
	173	{
	174	struct net_device *dev = edev->net;
	175	struct bnxt *bp = netdev_priv(dev);
a588e458 MC	176
	177	ASSERT_RTNL();
	178	if (ulp_id != BNXT_ROCE_ULP)
	179	return -EINVAL;
	180
ec86f14e MC	181	if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
	182	return 0;
	183
a588e458	184	edev->ulp_tbl[ulp_id].msix_requested = 0;
ec86f14e	185	edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
fbcfc8e4 MC	186	if (netif_running(dev)) {
	187	bnxt_close_nic(bp, true, false);
	188	bnxt_open_nic(bp, true, false);
	189	}
a588e458 MC	190	return 0;
	191	}
	192
08654eb2 MC	193	int bnxt_get_ulp_msix_num(struct bnxt *bp)
	194	{
	195	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	196	struct bnxt_en_dev *edev = bp->edev;
	197
	198	return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
	199	}
	200	return 0;
	201	}
	202
	203	int bnxt_get_ulp_msix_base(struct bnxt *bp)
	204	{
	205	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	206	struct bnxt_en_dev *edev = bp->edev;
	207
	208	if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
	209	return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
	210	}
	211	return 0;
	212	}
	213
c027c6b4 VV	214	int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
	215	{
	216	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP))
	217	return BNXT_MIN_ROCE_STAT_CTXS;
	218
	219	return 0;
	220	}
	221
a588e458 MC	222	static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
	223	struct bnxt_fw_msg *fw_msg)
	224	{
	225	struct net_device *dev = edev->net;
	226	struct bnxt *bp = netdev_priv(dev);
	227	struct input *req;
	228	int rc;
	229
	230	mutex_lock(&bp->hwrm_cmd_lock);
	231	req = fw_msg->msg;
	232	req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
	233	rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
	234	fw_msg->timeout);
	235	if (!rc) {
	236	struct output *resp = bp->hwrm_cmd_resp_addr;
	237	u32 len = le16_to_cpu(resp->resp_len);
	238
	239	if (fw_msg->resp_max_len < len)
	240	len = fw_msg->resp_max_len;
	241
	242	memcpy(fw_msg->resp, resp, len);
	243	}
	244	mutex_unlock(&bp->hwrm_cmd_lock);
	245	return rc;
	246	}
	247
	248	static void bnxt_ulp_get(struct bnxt_ulp *ulp)
	249	{
	250	atomic_inc(&ulp->ref_count);
	251	}
	252
	253	static void bnxt_ulp_put(struct bnxt_ulp *ulp)
	254	{
	255	atomic_dec(&ulp->ref_count);
	256	}
	257
	258	void bnxt_ulp_stop(struct bnxt *bp)
	259	{
	260	struct bnxt_en_dev *edev = bp->edev;
	261	struct bnxt_ulp_ops *ops;
	262	int i;
	263
	264	if (!edev)
	265	return;
	266
	267	for (i = 0; i < BNXT_MAX_ULP; i++) {
	268	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	269
	270	ops = rtnl_dereference(ulp->ulp_ops);
	271	if (!ops \|\| !ops->ulp_stop)
	272	continue;
	273	ops->ulp_stop(ulp->handle);
	274	}
	275	}
	276
	277	void bnxt_ulp_start(struct bnxt *bp)
	278	{
	279	struct bnxt_en_dev *edev = bp->edev;
	280	struct bnxt_ulp_ops *ops;
	281	int i;
	282
	283	if (!edev)
	284	return;
	285
286	for (i = 0; i < BNXT_MAX_ULP; i++) {
287	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
288
289	ops = rtnl_dereference(ulp->ulp_ops);
290	if (!ops \|\| !ops->ulp_start)
291	continue;
292	ops->ulp_start(ulp->handle);
293	}
294	}
295
296	void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
297	{
298	struct bnxt_en_dev *edev = bp->edev;
299	struct bnxt_ulp_ops *ops;
300	int i;
301
302	if (!edev)
303	return;
304
305	for (i = 0; i < BNXT_MAX_ULP; i++) {
306	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
307
308	rcu_read_lock();
309	ops = rcu_dereference(ulp->ulp_ops);
310	if (!ops \|\| !ops->ulp_sriov_config) {
311	rcu_read_unlock();
312	continue;
313	}
314	bnxt_ulp_get(ulp);
315	rcu_read_unlock();
316	ops->ulp_sriov_config(ulp->handle, num_vfs);
317	bnxt_ulp_put(ulp);
318	}
319	}
320
0efd2fc6 MC	321	void bnxt_ulp_shutdown(struct bnxt *bp)
	322	{
	323	struct bnxt_en_dev *edev = bp->edev;
	324	struct bnxt_ulp_ops *ops;
	325	int i;
	326
	327	if (!edev)
	328	return;
	329
	330	for (i = 0; i < BNXT_MAX_ULP; i++) {
	331	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	332
	333	ops = rtnl_dereference(ulp->ulp_ops);
	334	if (!ops \|\| !ops->ulp_shutdown)
	335	continue;
	336	ops->ulp_shutdown(ulp->handle);
	337	}
	338	}
	339
ec86f14e MC	340	void bnxt_ulp_irq_stop(struct bnxt *bp)
	341	{
	342	struct bnxt_en_dev *edev = bp->edev;
	343	struct bnxt_ulp_ops *ops;
	344
	345	if (!edev \|\| !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
	346	return;
	347
	348	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	349	struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
	350
	351	if (!ulp->msix_requested)
	352	return;
	353
	354	ops = rtnl_dereference(ulp->ulp_ops);
	355	if (!ops \|\| !ops->ulp_irq_stop)
	356	return;
	357	ops->ulp_irq_stop(ulp->handle);
	358	}
	359	}
	360
	361	void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
	362	{
	363	struct bnxt_en_dev *edev = bp->edev;
	364	struct bnxt_ulp_ops *ops;
	365
	366	if (!edev \|\| !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
	367	return;
	368
	369	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	370	struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
	371	struct bnxt_msix_entry *ent = NULL;
	372
	373	if (!ulp->msix_requested)
	374	return;
	375
	376	ops = rtnl_dereference(ulp->ulp_ops);
	377	if (!ops \|\| !ops->ulp_irq_restart)
	378	return;
	379
	380	if (!err) {
	381	ent = kcalloc(ulp->msix_requested, sizeof(*ent),
	382	GFP_KERNEL);
	383	if (!ent)
	384	return;
	385	bnxt_fill_msix_vecs(bp, ent);
	386	}
	387	ops->ulp_irq_restart(ulp->handle, ent);
	388	kfree(ent);
	389	}
	390	}
	391
a588e458 MC	392	void bnxt_ulp_async_events(struct bnxt bp, struct hwrm_async_event_cmpl cmpl)
	393	{
	394	u16 event_id = le16_to_cpu(cmpl->event_id);
	395	struct bnxt_en_dev *edev = bp->edev;
	396	struct bnxt_ulp_ops *ops;
	397	int i;
	398
	399	if (!edev)
	400	return;
	401
	402	rcu_read_lock();
	403	for (i = 0; i < BNXT_MAX_ULP; i++) {
	404	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	405
	406	ops = rcu_dereference(ulp->ulp_ops);
	407	if (!ops \|\| !ops->ulp_async_notifier)
	408	continue;
	409	if (!ulp->async_events_bmap \|\|
	410	event_id > ulp->max_async_event_id)
	411	continue;
	412
	413	/* Read max_async_event_id first before testing the bitmap. */
	414	smp_rmb();
	415	if (test_bit(event_id, ulp->async_events_bmap))
	416	ops->ulp_async_notifier(ulp->handle, cmpl);
	417	}
	418	rcu_read_unlock();
	419	}
	420
	421	static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
	422	unsigned long *events_bmap, u16 max_id)
	423	{
	424	struct net_device *dev = edev->net;
	425	struct bnxt *bp = netdev_priv(dev);
	426	struct bnxt_ulp *ulp;
	427
	428	if (ulp_id >= BNXT_MAX_ULP)
	429	return -EINVAL;
	430
	431	ulp = &edev->ulp_tbl[ulp_id];
	432	ulp->async_events_bmap = events_bmap;
	433	/* Make sure bnxt_ulp_async_events() sees this order */
	434	smp_wmb();
	435	ulp->max_async_event_id = max_id;
	436	bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
	437	return 0;
	438	}
	439
	440	static const struct bnxt_en_ops bnxt_en_ops_tbl = {
	441	.bnxt_register_device = bnxt_register_dev,
	442	.bnxt_unregister_device = bnxt_unregister_dev,
	443	.bnxt_request_msix = bnxt_req_msix_vecs,
	444	.bnxt_free_msix = bnxt_free_msix_vecs,
	445	.bnxt_send_fw_msg = bnxt_send_msg,
	446	.bnxt_register_fw_async_events = bnxt_register_async_events,
	447	};
	448
	449	struct bnxt_en_dev bnxt_ulp_probe(struct net_device dev)
	450	{
	451	struct bnxt *bp = netdev_priv(dev);
	452	struct bnxt_en_dev *edev;
	453
	454	edev = bp->edev;
	455	if (!edev) {
456	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
457	if (!edev)
458	return ERR_PTR(-ENOMEM);
459	edev->en_ops = &bnxt_en_ops_tbl;
460	if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
461	edev->flags \|= BNXT_EN_FLAG_ROCEV1_CAP;
462	if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
463	edev->flags \|= BNXT_EN_FLAG_ROCEV2_CAP;
464	edev->net = dev;
465	edev->pdev = bp->pdev;
466	bp->edev = edev;
467	}
468	return bp->edev;
469	}