blob: beee61292d5e522bae0842e5e76253eeb4e1d1f4 [file] [log] [blame]
/* 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;
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;
}