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

/* Broadcom NetXtreme-C/E network driver.
 *
 * Copyright (c) 2016 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;

		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 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, i, 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 (bp->flags & BNXT_FLAG_NEW_RM) {
		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 (bp->flags & BNXT_FLAG_NEW_RM) {
		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;
	}
	for (i = 0; i < avail_msix; i++) {
		ent[i].vector = bp->irq_tbl[idx + i].vector;
		ent[i].ring_idx = idx + i;
		ent[i].db_offset = (idx + i) * 0x80;
	}
	bnxt_set_max_func_irqs(bp, bnxt_get_max_func_irqs(bp) - avail_msix);
	bnxt_set_max_func_cp_rings(bp, max_cp_rings - avail_msix);
	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);
	int max_cp_rings, msix_requested;

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

	max_cp_rings = bnxt_get_max_func_cp_rings(bp);
	msix_requested = edev->ulp_tbl[ulp_id].msix_requested;
	bnxt_set_max_func_cp_rings(bp, max_cp_rings + msix_requested);
	edev->ulp_tbl[ulp_id].msix_requested = 0;
	bnxt_set_max_func_irqs(bp, bnxt_get_max_func_irqs(bp) + 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;
}

void bnxt_subtract_ulp_resources(struct bnxt *bp, int ulp_id)
{
	ASSERT_RTNL();
	if (bnxt_ulp_registered(bp->edev, ulp_id)) {
		struct bnxt_en_dev *edev = bp->edev;
		unsigned int msix_req, max;

		msix_req = edev->ulp_tbl[ulp_id].msix_requested;
		max = bnxt_get_max_func_cp_rings(bp);
		bnxt_set_max_func_cp_rings(bp, max - msix_req);
		max = bnxt_get_max_func_stat_ctxs(bp);
		bnxt_set_max_func_stat_ctxs(bp, max - 1);
	}
}

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_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.
	2	*
	3	* Copyright (c) 2016 Broadcom Limited
	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
	46	max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
	47	if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS \|\|
	48	bp->num_stat_ctxs == max_stat_ctxs)
	49	return -ENOMEM;
	50	bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs -
	51	BNXT_MIN_ROCE_STAT_CTXS);
	52	}
	53
	54	atomic_set(&ulp->ref_count, 0);
	55	ulp->handle = handle;
	56	rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
	57
	58	if (ulp_id == BNXT_ROCE_ULP) {
	59	if (test_bit(BNXT_STATE_OPEN, &bp->state))
	60	bnxt_hwrm_vnic_cfg(bp, 0);
	61	}
	62
	63	return 0;
	64	}
65
66	static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
67	{
68	struct net_device *dev = edev->net;
69	struct bnxt *bp = netdev_priv(dev);
70	struct bnxt_ulp *ulp;
71	int i = 0;
72
73	ASSERT_RTNL();
74	if (ulp_id >= BNXT_MAX_ULP)
75	return -EINVAL;
76
77	ulp = &edev->ulp_tbl[ulp_id];
78	if (!rcu_access_pointer(ulp->ulp_ops)) {
79	netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id);
80	return -EINVAL;
81	}
82	if (ulp_id == BNXT_ROCE_ULP) {
83	unsigned int max_stat_ctxs;
84
85	max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
86	bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs + 1);
146ed3c5 MC	87	if (ulp->msix_requested)
146ed3c5 MC	88	edev->en_ops->bnxt_free_msix(edev, ulp_id);
a588e458 MC	89	}
	90	if (ulp->max_async_event_id)
	91	bnxt_hwrm_func_rgtr_async_events(bp, NULL, 0);
	92
	93	RCU_INIT_POINTER(ulp->ulp_ops, NULL);
	94	synchronize_rcu();
	95	ulp->max_async_event_id = 0;
	96	ulp->async_events_bmap = NULL;
	97	while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
	98	msleep(100);
	99	i++;
	100	}
	101	return 0;
	102	}
	103
	104	static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
	105	struct bnxt_msix_entry *ent, int num_msix)
	106	{
	107	struct net_device *dev = edev->net;
	108	struct bnxt *bp = netdev_priv(dev);
	109	int max_idx, max_cp_rings;
	110	int avail_msix, i, idx;
fbcfc8e4	111	int rc = 0;
a588e458 MC	112
	113	ASSERT_RTNL();
	114	if (ulp_id != BNXT_ROCE_ULP)
	115	return -EINVAL;
	116
	117	if (!(bp->flags & BNXT_FLAG_USING_MSIX))
	118	return -ENODEV;
	119
08654eb2 MC	120	if (edev->ulp_tbl[ulp_id].msix_requested)
	121	return -EAGAIN;
	122
a588e458	123	max_cp_rings = bnxt_get_max_func_cp_rings(bp);
fbcfc8e4	124	avail_msix = bnxt_get_avail_msix(bp, num_msix);
a588e458 MC	125	if (!avail_msix)
	126	return -ENOMEM;
	127	if (avail_msix > num_msix)
	128	avail_msix = num_msix;
	129
fbcfc8e4	130	if (bp->flags & BNXT_FLAG_NEW_RM) {
08654eb2	131	idx = bp->cp_nr_rings;
fbcfc8e4 MC	132	} else {
fbcfc8e4 MC	133	max_idx = min_t(int, bp->total_irqs, max_cp_rings);
08654eb2	134	idx = max_idx - avail_msix;
fbcfc8e4	135	}
08654eb2	136	edev->ulp_tbl[ulp_id].msix_base = idx;
fbcfc8e4 MC	137	edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
	138	if (bp->total_irqs < (idx + avail_msix)) {
	139	if (netif_running(dev)) {
	140	bnxt_close_nic(bp, true, false);
	141	rc = bnxt_open_nic(bp, true, false);
	142	} else {
	143	rc = bnxt_reserve_rings(bp);
	144	}
	145	}
	146	if (rc) {
	147	edev->ulp_tbl[ulp_id].msix_requested = 0;
	148	return -EAGAIN;
	149	}
	150
	151	if (bp->flags & BNXT_FLAG_NEW_RM) {
	152	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
	153
	154	avail_msix = hw_resc->resv_cp_rings - bp->cp_nr_rings;
	155	edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
	156	}
a588e458 MC	157	for (i = 0; i < avail_msix; i++) {
	158	ent[i].vector = bp->irq_tbl[idx + i].vector;
	159	ent[i].ring_idx = idx + i;
	160	ent[i].db_offset = (idx + i) * 0x80;
	161	}
fbcfc8e4	162	bnxt_set_max_func_irqs(bp, bnxt_get_max_func_irqs(bp) - avail_msix);
a588e458	163	bnxt_set_max_func_cp_rings(bp, max_cp_rings - avail_msix);
a588e458 MC	164	return avail_msix;
	165	}
	166
	167	static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
	168	{
	169	struct net_device *dev = edev->net;
	170	struct bnxt *bp = netdev_priv(dev);
	171	int max_cp_rings, msix_requested;
	172
	173	ASSERT_RTNL();
	174	if (ulp_id != BNXT_ROCE_ULP)
	175	return -EINVAL;
	176
	177	max_cp_rings = bnxt_get_max_func_cp_rings(bp);
	178	msix_requested = edev->ulp_tbl[ulp_id].msix_requested;
	179	bnxt_set_max_func_cp_rings(bp, max_cp_rings + msix_requested);
	180	edev->ulp_tbl[ulp_id].msix_requested = 0;
fbcfc8e4 MC	181	bnxt_set_max_func_irqs(bp, bnxt_get_max_func_irqs(bp) + msix_requested);
	182	if (netif_running(dev)) {
	183	bnxt_close_nic(bp, true, false);
	184	bnxt_open_nic(bp, true, false);
	185	}
a588e458 MC	186	return 0;
	187	}
	188
08654eb2 MC	189	int bnxt_get_ulp_msix_num(struct bnxt *bp)
	190	{
	191	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	192	struct bnxt_en_dev *edev = bp->edev;
	193
	194	return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
	195	}
	196	return 0;
	197	}
	198
	199	int bnxt_get_ulp_msix_base(struct bnxt *bp)
	200	{
	201	if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
	202	struct bnxt_en_dev *edev = bp->edev;
	203
	204	if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
	205	return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
	206	}
	207	return 0;
	208	}
	209
a588e458 MC	210	void bnxt_subtract_ulp_resources(struct bnxt *bp, int ulp_id)
	211	{
	212	ASSERT_RTNL();
	213	if (bnxt_ulp_registered(bp->edev, ulp_id)) {
	214	struct bnxt_en_dev *edev = bp->edev;
	215	unsigned int msix_req, max;
	216
	217	msix_req = edev->ulp_tbl[ulp_id].msix_requested;
	218	max = bnxt_get_max_func_cp_rings(bp);
	219	bnxt_set_max_func_cp_rings(bp, max - msix_req);
	220	max = bnxt_get_max_func_stat_ctxs(bp);
	221	bnxt_set_max_func_stat_ctxs(bp, max - 1);
	222	}
	223	}
	224
	225	static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
	226	struct bnxt_fw_msg *fw_msg)
	227	{
	228	struct net_device *dev = edev->net;
	229	struct bnxt *bp = netdev_priv(dev);
	230	struct input *req;
	231	int rc;
	232
	233	mutex_lock(&bp->hwrm_cmd_lock);
	234	req = fw_msg->msg;
	235	req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
	236	rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
	237	fw_msg->timeout);
	238	if (!rc) {
	239	struct output *resp = bp->hwrm_cmd_resp_addr;
	240	u32 len = le16_to_cpu(resp->resp_len);
	241
	242	if (fw_msg->resp_max_len < len)
	243	len = fw_msg->resp_max_len;
	244
	245	memcpy(fw_msg->resp, resp, len);
	246	}
	247	mutex_unlock(&bp->hwrm_cmd_lock);
	248	return rc;
	249	}
	250
	251	static void bnxt_ulp_get(struct bnxt_ulp *ulp)
	252	{
	253	atomic_inc(&ulp->ref_count);
	254	}
	255
	256	static void bnxt_ulp_put(struct bnxt_ulp *ulp)
	257	{
	258	atomic_dec(&ulp->ref_count);
	259	}
	260
	261	void bnxt_ulp_stop(struct bnxt *bp)
	262	{
	263	struct bnxt_en_dev *edev = bp->edev;
	264	struct bnxt_ulp_ops *ops;
	265	int i;
	266
	267	if (!edev)
	268	return;
	269
	270	for (i = 0; i < BNXT_MAX_ULP; i++) {
	271	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	272
	273	ops = rtnl_dereference(ulp->ulp_ops);
274	if (!ops \|\| !ops->ulp_stop)
275	continue;
276	ops->ulp_stop(ulp->handle);
277	}
278	}
279
280	void bnxt_ulp_start(struct bnxt *bp)
281	{
282	struct bnxt_en_dev *edev = bp->edev;
283	struct bnxt_ulp_ops *ops;
284	int i;
285
286	if (!edev)
287	return;
288
289	for (i = 0; i < BNXT_MAX_ULP; i++) {
290	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
291
292	ops = rtnl_dereference(ulp->ulp_ops);
293	if (!ops \|\| !ops->ulp_start)
294	continue;
295	ops->ulp_start(ulp->handle);
296	}
297	}
298
299	void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
300	{
301	struct bnxt_en_dev *edev = bp->edev;
302	struct bnxt_ulp_ops *ops;
303	int i;
304
305	if (!edev)
306	return;
307
308	for (i = 0; i < BNXT_MAX_ULP; i++) {
309	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
310
311	rcu_read_lock();
312	ops = rcu_dereference(ulp->ulp_ops);
313	if (!ops \|\| !ops->ulp_sriov_config) {
314	rcu_read_unlock();
315	continue;
316	}
317	bnxt_ulp_get(ulp);
318	rcu_read_unlock();
319	ops->ulp_sriov_config(ulp->handle, num_vfs);
320	bnxt_ulp_put(ulp);
321	}
322	}
323
0efd2fc6 MC	324	void bnxt_ulp_shutdown(struct bnxt *bp)
	325	{
	326	struct bnxt_en_dev *edev = bp->edev;
	327	struct bnxt_ulp_ops *ops;
	328	int i;
	329
	330	if (!edev)
	331	return;
	332
	333	for (i = 0; i < BNXT_MAX_ULP; i++) {
	334	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	335
	336	ops = rtnl_dereference(ulp->ulp_ops);
	337	if (!ops \|\| !ops->ulp_shutdown)
	338	continue;
	339	ops->ulp_shutdown(ulp->handle);
	340	}
	341	}
	342
a588e458 MC	343	void bnxt_ulp_async_events(struct bnxt bp, struct hwrm_async_event_cmpl cmpl)
	344	{
	345	u16 event_id = le16_to_cpu(cmpl->event_id);
	346	struct bnxt_en_dev *edev = bp->edev;
	347	struct bnxt_ulp_ops *ops;
	348	int i;
	349
	350	if (!edev)
	351	return;
	352
	353	rcu_read_lock();
	354	for (i = 0; i < BNXT_MAX_ULP; i++) {
	355	struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
	356
	357	ops = rcu_dereference(ulp->ulp_ops);
	358	if (!ops \|\| !ops->ulp_async_notifier)
	359	continue;
	360	if (!ulp->async_events_bmap \|\|
	361	event_id > ulp->max_async_event_id)
	362	continue;
	363
	364	/* Read max_async_event_id first before testing the bitmap. */
	365	smp_rmb();
	366	if (test_bit(event_id, ulp->async_events_bmap))
	367	ops->ulp_async_notifier(ulp->handle, cmpl);
	368	}
	369	rcu_read_unlock();
	370	}
	371
	372	static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
	373	unsigned long *events_bmap, u16 max_id)
	374	{
	375	struct net_device *dev = edev->net;
	376	struct bnxt *bp = netdev_priv(dev);
	377	struct bnxt_ulp *ulp;
	378
	379	if (ulp_id >= BNXT_MAX_ULP)
	380	return -EINVAL;
	381
	382	ulp = &edev->ulp_tbl[ulp_id];
	383	ulp->async_events_bmap = events_bmap;
	384	/* Make sure bnxt_ulp_async_events() sees this order */
	385	smp_wmb();
	386	ulp->max_async_event_id = max_id;
	387	bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
	388	return 0;
	389	}
	390
	391	static const struct bnxt_en_ops bnxt_en_ops_tbl = {
	392	.bnxt_register_device = bnxt_register_dev,
	393	.bnxt_unregister_device = bnxt_unregister_dev,
	394	.bnxt_request_msix = bnxt_req_msix_vecs,
	395	.bnxt_free_msix = bnxt_free_msix_vecs,
	396	.bnxt_send_fw_msg = bnxt_send_msg,
	397	.bnxt_register_fw_async_events = bnxt_register_async_events,
	398	};
	399
	400	struct bnxt_en_dev bnxt_ulp_probe(struct net_device dev)
	401	{
	402	struct bnxt *bp = netdev_priv(dev);
	403	struct bnxt_en_dev *edev;
	404
	405	edev = bp->edev;
	406	if (!edev) {
407	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
408	if (!edev)
409	return ERR_PTR(-ENOMEM);
410	edev->en_ops = &bnxt_en_ops_tbl;
411	if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
412	edev->flags \|= BNXT_EN_FLAG_ROCEV1_CAP;
413	if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
414	edev->flags \|= BNXT_EN_FLAG_ROCEV2_CAP;
415	edev->net = dev;
416	edev->pdev = bp->pdev;
417	bp->edev = edev;
418	}
419	return bp->edev;
420	}