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/*
* Copyright 2008-2013 Freescale Semiconductor Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define pr_fmt(fmt) \
KBUILD_MODNAME ": %s:%hu:%s() " fmt, \
KBUILD_BASENAME".c", __LINE__, __func__
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_net.h>
#include <linux/etherdevice.h>
#include <linux/kthread.h>
#include <linux/percpu.h>
#include <linux/highmem.h>
#include <linux/fsl_qman.h>
#include "dpaa_eth.h"
#include "dpaa_eth_common.h"
#include "lnxwrp_fsl_fman.h" /* fm_get_rx_extra_headroom(), fm_get_max_frm() */
/* For MAC-based interfaces, we compute the tx needed headroom from the
* associated Tx port's buffer layout settings.
* For MACless interfaces just use a default value.
*/
#define DPA_DEFAULT_TX_HEADROOM 64
#define DPA_DESCRIPTION "FSL DPAA MACless Ethernet driver"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION(DPA_DESCRIPTION);
static uint8_t debug = -1;
module_param(debug, byte, S_IRUGO);
MODULE_PARM_DESC(debug, "Module/Driver verbosity level");
/* This has to work in tandem with the DPA_CS_THRESHOLD_xxx values. */
static uint16_t tx_timeout = 1000;
module_param(tx_timeout, ushort, S_IRUGO);
MODULE_PARM_DESC(tx_timeout, "The Tx timeout in ms");
/* reused from the shared driver */
extern const dpa_fq_cbs_t shared_fq_cbs;
int __hot dpa_shared_tx(struct sk_buff *skb, struct net_device *net_dev);
/* forward declarations */
static int __cold dpa_macless_start(struct net_device *net_dev);
static int __cold dpa_macless_stop(struct net_device *net_dev);
static int dpa_set_macless_address(struct net_device *net_dev, void *addr);
static int dpaa_eth_macless_probe(struct platform_device *_of_dev);
static netdev_features_t
dpa_macless_fix_features(struct net_device *dev, netdev_features_t features);
static int dpa_macless_netdev_init(struct device_node *dpa_node,
struct net_device *net_dev);
static const struct net_device_ops dpa_macless_ops = {
.ndo_open = dpa_macless_start,
.ndo_start_xmit = dpa_shared_tx,
.ndo_stop = dpa_macless_stop,
.ndo_tx_timeout = dpa_timeout,
.ndo_get_stats64 = dpa_get_stats64,
.ndo_set_mac_address = dpa_set_macless_address,
.ndo_validate_addr = eth_validate_addr,
#ifdef CONFIG_FSL_DPAA_ETH_USE_NDO_SELECT_QUEUE
.ndo_select_queue = dpa_select_queue,
#endif
.ndo_change_mtu = dpa_change_mtu,
.ndo_init = dpa_ndo_init,
.ndo_set_features = dpa_set_features,
.ndo_fix_features = dpa_macless_fix_features,
};
static const struct of_device_id dpa_macless_match[] = {
{
.compatible = "fsl,dpa-ethernet-macless"
},
{}
};
MODULE_DEVICE_TABLE(of, dpa_macless_match);
static struct platform_driver dpa_macless_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = dpa_macless_match,
.owner = THIS_MODULE,
},
.probe = dpaa_eth_macless_probe,
.remove = dpa_remove
};
static const char macless_frame_queues[][25] = {
[RX] = "fsl,qman-frame-queues-rx",
[TX] = "fsl,qman-frame-queues-tx"
};
static int __cold dpa_macless_start(struct net_device *net_dev)
{
netif_tx_start_all_queues(net_dev);
return 0;
}
static int __cold dpa_macless_stop(struct net_device *net_dev)
{
netif_tx_stop_all_queues(net_dev);
return 0;
}
static int dpa_set_macless_address(struct net_device *net_dev, void *addr)
{
const struct dpa_priv_s *priv;
int _errno;
priv = netdev_priv(net_dev);
_errno = eth_mac_addr(net_dev, addr);
if (_errno < 0) {
if (netif_msg_drv(priv))
netdev_err(net_dev,
"eth_mac_addr() = %d\n",
_errno);
return _errno;
}
return 0;
}
static netdev_features_t
dpa_macless_fix_features(struct net_device *dev, netdev_features_t features)
{
netdev_features_t unsupported_features = 0;
/* In theory we should never be requested to enable features that
* we didn't set in netdev->features and netdev->hw_features at probe
* time, but double check just to be on the safe side.
*/
unsupported_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
/* We don't support enabling Rx csum through ethtool yet */
unsupported_features |= NETIF_F_RXCSUM;
features &= ~unsupported_features;
return features;
}
static int dpa_macless_netdev_init(struct device_node *dpa_node,
struct net_device *net_dev)
{
struct dpa_priv_s *priv = netdev_priv(net_dev);
struct device *dev = net_dev->dev.parent;
const uint8_t *mac_addr;
net_dev->netdev_ops = &dpa_macless_ops;
/* Get the MAC address */
mac_addr = of_get_mac_address(dpa_node);
if (mac_addr == NULL) {
if (netif_msg_probe(priv))
dev_err(dev, "No MAC address found!\n");
return -EINVAL;
}
return dpa_netdev_init(dpa_node, net_dev, mac_addr, tx_timeout);
}
/* Probing of FQs for MACless ports */
static int dpa_fq_probe_macless(struct device *dev, struct list_head *list,
enum port_type ptype)
{
struct device_node *np = dev->of_node;
const struct fqid_cell *fqids;
int num_ranges;
int i, lenp;
fqids = of_get_property(np, macless_frame_queues[ptype], &lenp);
if (fqids == NULL) {
dev_err(dev, "Need FQ definition in dts for MACless devices\n");
return -EINVAL;
}
num_ranges = lenp / sizeof(*fqids);
/* All ranges defined in the device tree are used as Rx/Tx queues */
for (i = 0; i < num_ranges; i++) {
if (!dpa_fq_alloc(dev, &fqids[i], list, ptype == RX ?
FQ_TYPE_RX_PCD : FQ_TYPE_TX)) {
dev_err(dev, "_dpa_fq_alloc() failed\n");
return -ENOMEM;
}
}
return 0;
}
static int dpaa_eth_macless_probe(struct platform_device *_of_dev)
{
int err = 0, i;
struct device *dev;
struct device_node *dpa_node;
struct dpa_bp *dpa_bp;
struct dpa_fq *dpa_fq, *tmp;
size_t count;
struct net_device *net_dev = NULL;
struct dpa_priv_s *priv = NULL;
struct dpa_percpu_priv_s *percpu_priv;
struct fm_port_fqs port_fqs;
struct task_struct *kth;
static u8 macless_idx;
dev = &_of_dev->dev;
dpa_node = dev->of_node;
if (!of_device_is_available(dpa_node))
return -ENODEV;
/* Get the buffer pools assigned to this interface */
dpa_bp = dpa_bp_probe(_of_dev, &count);
if (IS_ERR(dpa_bp))
return PTR_ERR(dpa_bp);
/* Allocate this early, so we can store relevant information in
* the private area (needed by 1588 code in dpa_mac_probe)
*/
net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA_ETH_TX_QUEUES);
if (!net_dev) {
dev_err(dev, "alloc_etherdev_mq() failed\n");
return -ENOMEM;
}
/* Do this here, so we can be verbose early */
SET_NETDEV_DEV(net_dev, dev);
dev_set_drvdata(dev, net_dev);
priv = netdev_priv(net_dev);
priv->net_dev = net_dev;
priv->msg_enable = netif_msg_init(debug, -1);
INIT_LIST_HEAD(&priv->dpa_fq_list);
memset(&port_fqs, 0, sizeof(port_fqs));
err = dpa_fq_probe_macless(dev, &priv->dpa_fq_list, RX);
if (!err)
err = dpa_fq_probe_macless(dev, &priv->dpa_fq_list,
TX);
if (err < 0)
goto fq_probe_failed;
/* bp init */
err = dpa_bp_create(net_dev, dpa_bp, count);
if (err < 0)
goto bp_create_failed;
priv->mac_dev = NULL;
priv->channel = dpa_get_channel(dev, dpa_node);
if (priv->channel < 0) {
err = priv->channel;
goto get_channel_failed;
}
/* Start a thread that will walk the cpus with affine portals
* and add this pool channel to each's dequeue mask.
*/
kth = kthread_run(dpaa_eth_add_channel,
(void *)(unsigned long)priv->channel,
"dpaa_%p:%d", net_dev, priv->channel);
if (!kth) {
err = -ENOMEM;
goto add_channel_failed;
}
dpa_fq_setup(priv, &shared_fq_cbs, NULL);
/* Add the FQs to the interface, and make them active */
list_for_each_entry_safe(dpa_fq, tmp, &priv->dpa_fq_list, list) {
/* For MAC-less devices we only get here for RX frame queues
* initialization, which are the TX queues of the other
* partition.
* It is safe to rely on one partition to set the FQ taildrop
* threshold for the TX queues of the other partition
* because the ERN notifications will be received by the
* partition doing qman_enqueue.
*/
err = dpa_fq_init(dpa_fq, true);
if (err < 0)
goto fq_alloc_failed;
}
priv->tx_headroom = DPA_DEFAULT_TX_HEADROOM;
priv->percpu_priv = alloc_percpu(*priv->percpu_priv);
if (priv->percpu_priv == NULL) {
dev_err(dev, "alloc_percpu() failed\n");
err = -ENOMEM;
goto alloc_percpu_failed;
}
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
memset(percpu_priv, 0, sizeof(*percpu_priv));
}
err = dpa_macless_netdev_init(dpa_node, net_dev);
if (err < 0)
goto netdev_init_failed;
priv->macless_idx = macless_idx++;
dpaa_eth_sysfs_init(&net_dev->dev);
printk(KERN_INFO "fsl_dpa_macless: Probed macless interface %s\n", net_dev->name);
return 0;
netdev_init_failed:
if (net_dev)
free_percpu(priv->percpu_priv);
alloc_percpu_failed:
fq_alloc_failed:
if (net_dev) {
dpa_fq_free(dev, &priv->dpa_fq_list);
qman_release_cgrid(priv->cgr_data.cgr.cgrid);
qman_delete_cgr(&priv->cgr_data.cgr);
}
add_channel_failed:
get_channel_failed:
if (net_dev)
dpa_bp_free(priv, priv->dpa_bp);
bp_create_failed:
fq_probe_failed:
dev_set_drvdata(dev, NULL);
if (net_dev)
free_netdev(net_dev);
return err;
}
static int __init __cold dpa_macless_load(void)
{
int _errno;
printk(KERN_INFO KBUILD_MODNAME ": " DPA_DESCRIPTION " (" VERSION ")\n");
/* Initialize dpaa_eth mirror values */
dpa_rx_extra_headroom = fm_get_rx_extra_headroom();
dpa_max_frm = fm_get_max_frm();
_errno = platform_driver_register(&dpa_macless_driver);
if (unlikely(_errno < 0)) {
pr_err(KBUILD_MODNAME
": %s:%hu:%s(): platform_driver_register() = %d\n",
KBUILD_BASENAME".c", __LINE__, __func__, _errno);
}
pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
KBUILD_BASENAME".c", __func__);
return _errno;
}
module_init(dpa_macless_load);
static void __exit __cold dpa_macless_unload(void)
{
platform_driver_unregister(&dpa_macless_driver);
pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
KBUILD_BASENAME".c", __func__);
}
module_exit(dpa_macless_unload);
|