Quellcode-Bibliothek xgbe-main.c
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// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
/*
* Copyright (c) 2014-2025, Advanced Micro Devices, Inc.
* Copyright (c) 2014, Synopsys, Inc.
* All rights reserved
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/io.h>
#include <linux/notifier.h>
#include "xgbe.h"
#include "xgbe-common.h"
MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>" );
MODULE_LICENSE("Dual BSD/GPL" );
MODULE_DESCRIPTION(XGBE_DRV_DESC);
static int debug = -1 ;
module_param(debug, int , 0644 );
MODULE_PARM_DESC(debug, " Network interface message level setting" );
static const u32 default_msg_level = (NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
NETIF_MSG_IFUP);
static void xgbe_default_config(struct xgbe_prv_data *pdata)
{
DBGPR("-->xgbe_default_config\n" );
pdata->blen = DMA_SBMR_BLEN_64;
pdata->pbl = DMA_PBL_128;
pdata->aal = 1 ;
pdata->rd_osr_limit = 8 ;
pdata->wr_osr_limit = 8 ;
pdata->tx_sf_mode = MTL_TSF_ENABLE;
pdata->tx_threshold = MTL_TX_THRESHOLD_64;
pdata->tx_osp_mode = DMA_OSP_ENABLE;
pdata->rx_sf_mode = MTL_RSF_DISABLE;
pdata->rx_threshold = MTL_RX_THRESHOLD_64;
pdata->pause_autoneg = 1 ;
pdata->tx_pause = 1 ;
pdata->rx_pause = 1 ;
pdata->phy_speed = SPEED_UNKNOWN;
pdata->power_down = 0 ;
DBGPR("<--xgbe_default_config\n" );
}
static void xgbe_init_all_fptrs(struct xgbe_prv_data *pdata)
{
xgbe_init_function_ptrs_dev(&pdata->hw_if);
xgbe_init_function_ptrs_phy(&pdata->phy_if);
xgbe_init_function_ptrs_i2c(&pdata->i2c_if);
xgbe_init_function_ptrs_desc(&pdata->desc_if);
pdata->vdata->init_function_ptrs_phy_impl(&pdata->phy_if);
}
struct xgbe_prv_data *xgbe_alloc_pdata(struct device *dev)
{
struct xgbe_prv_data *pdata;
struct net_device *netdev;
netdev = alloc_etherdev_mq(sizeof (struct xgbe_prv_data),
XGBE_MAX_DMA_CHANNELS);
if (!netdev) {
dev_err(dev, "alloc_etherdev_mq failed\n" );
return ERR_PTR(-ENOMEM);
}
SET_NETDEV_DEV(netdev, dev);
pdata = netdev_priv(netdev);
pdata->netdev = netdev;
pdata->dev = dev;
spin_lock_init(&pdata->lock);
spin_lock_init(&pdata->xpcs_lock);
mutex_init(&pdata->rss_mutex);
spin_lock_init(&pdata->tstamp_lock);
mutex_init(&pdata->i2c_mutex);
init_completion(&pdata->i2c_complete);
init_completion(&pdata->mdio_complete);
pdata->msg_enable = netif_msg_init(debug, default_msg_level);
set_bit(XGBE_DOWN, &pdata->dev_state);
set_bit(XGBE_STOPPED, &pdata->dev_state);
return pdata;
}
void xgbe_free_pdata(struct xgbe_prv_data *pdata)
{
struct net_device *netdev = pdata->netdev;
free_netdev(netdev);
}
void xgbe_set_counts(struct xgbe_prv_data *pdata)
{
/* Set all the function pointers */
xgbe_init_all_fptrs(pdata);
/* Populate the hardware features */
xgbe_get_all_hw_features(pdata);
/* Set default max values if not provided */
if (!pdata->tx_max_channel_count)
pdata->tx_max_channel_count = pdata->hw_feat.tx_ch_cnt;
if (!pdata->rx_max_channel_count)
pdata->rx_max_channel_count = pdata->hw_feat.rx_ch_cnt;
if (!pdata->tx_max_q_count)
pdata->tx_max_q_count = pdata->hw_feat.tx_q_cnt;
if (!pdata->rx_max_q_count)
pdata->rx_max_q_count = pdata->hw_feat.rx_q_cnt;
/* Calculate the number of Tx and Rx rings to be created
* -Tx (DMA) Channels map 1-to-1 to Tx Queues so set
* the number of Tx queues to the number of Tx channels
* enabled
* -Rx (DMA) Channels do not map 1-to-1 so use the actual
* number of Rx queues or maximum allowed
*/
pdata->tx_ring_count = min_t(unsigned int , num_online_cpus(),
pdata->hw_feat.tx_ch_cnt);
pdata->tx_ring_count = min_t(unsigned int , pdata->tx_ring_count,
pdata->tx_max_channel_count);
pdata->tx_ring_count = min_t(unsigned int , pdata->tx_ring_count,
pdata->tx_max_q_count);
pdata->tx_q_count = pdata->tx_ring_count;
pdata->rx_ring_count = min_t(unsigned int , num_online_cpus(),
pdata->hw_feat.rx_ch_cnt);
pdata->rx_ring_count = min_t(unsigned int , pdata->rx_ring_count,
pdata->rx_max_channel_count);
pdata->rx_q_count = min_t(unsigned int , pdata->hw_feat.rx_q_cnt,
pdata->rx_max_q_count);
if (netif_msg_probe(pdata)) {
dev_dbg(pdata->dev, "TX/RX DMA channel count = %u/%u\n" ,
pdata->tx_ring_count, pdata->rx_ring_count);
dev_dbg(pdata->dev, "TX/RX hardware queue count = %u/%u\n" ,
pdata->tx_q_count, pdata->rx_q_count);
}
}
int xgbe_config_netdev(struct xgbe_prv_data *pdata)
{
struct net_device *netdev = pdata->netdev;
struct device *dev = pdata->dev;
int ret;
netdev->irq = pdata->dev_irq;
netdev->base_addr = (unsigned long )pdata->xgmac_regs;
eth_hw_addr_set(netdev, pdata->mac_addr);
/* Initialize ECC timestamps */
pdata->tx_sec_period = jiffies;
pdata->tx_ded_period = jiffies;
pdata->rx_sec_period = jiffies;
pdata->rx_ded_period = jiffies;
pdata->desc_sec_period = jiffies;
pdata->desc_ded_period = jiffies;
/* Issue software reset to device */
ret = pdata->hw_if.exit (pdata);
if (ret) {
dev_err(dev, "software reset failed\n" );
return ret;
}
/* Set default configuration data */
xgbe_default_config(pdata);
/* Set the DMA mask */
ret = dma_set_mask_and_coherent(dev,
DMA_BIT_MASK(pdata->hw_feat.dma_width));
if (ret) {
dev_err(dev, "dma_set_mask_and_coherent failed\n" );
return ret;
}
/* Set default max values if not provided */
if (!pdata->tx_max_fifo_size)
pdata->tx_max_fifo_size = pdata->hw_feat.tx_fifo_size;
if (!pdata->rx_max_fifo_size)
pdata->rx_max_fifo_size = pdata->hw_feat.rx_fifo_size;
/* Set and validate the number of descriptors for a ring */
BUILD_BUG_ON_NOT_POWER_OF_2(XGBE_TX_DESC_CNT);
pdata->tx_desc_count = XGBE_TX_DESC_CNT;
BUILD_BUG_ON_NOT_POWER_OF_2(XGBE_RX_DESC_CNT);
pdata->rx_desc_count = XGBE_RX_DESC_CNT;
/* Adjust the number of queues based on interrupts assigned */
if (pdata->channel_irq_count) {
pdata->tx_ring_count = min_t(unsigned int , pdata->tx_ring_count,
pdata->channel_irq_count);
pdata->rx_ring_count = min_t(unsigned int , pdata->rx_ring_count,
pdata->channel_irq_count);
if (netif_msg_probe(pdata))
dev_dbg(pdata->dev,
"adjusted TX/RX DMA channel count = %u/%u\n" ,
pdata->tx_ring_count, pdata->rx_ring_count);
}
/* Initialize RSS hash key */
netdev_rss_key_fill(pdata->rss_key, sizeof (pdata->rss_key));
XGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, IP2TE, 1 );
XGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, TCP4TE, 1 );
XGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, UDP4TE, 1 );
/* Call MDIO/PHY initialization routine */
pdata->debugfs_an_cdr_workaround = pdata->vdata->an_cdr_workaround;
ret = pdata->phy_if.phy_init(pdata);
if (ret)
return ret;
/* Set device operations */
netdev->netdev_ops = xgbe_get_netdev_ops();
netdev->ethtool_ops = xgbe_get_ethtool_ops();
#ifdef CONFIG_AMD_XGBE_DCB
netdev->dcbnl_ops = xgbe_get_dcbnl_ops();
#endif
/* Set device features */
netdev->hw_features = NETIF_F_SG |
NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM |
NETIF_F_RXCSUM |
NETIF_F_TSO |
NETIF_F_TSO6 |
NETIF_F_GRO |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_CTAG_FILTER;
if (pdata->hw_feat.rss)
netdev->hw_features |= NETIF_F_RXHASH;
if (pdata->hw_feat.vxn) {
netdev->hw_enc_features = NETIF_F_SG |
NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM |
NETIF_F_RXCSUM |
NETIF_F_TSO |
NETIF_F_TSO6 |
NETIF_F_GRO |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->udp_tunnel_nic_info = xgbe_get_udp_tunnel_info();
}
netdev->vlan_features |= NETIF_F_SG |
NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM |
NETIF_F_TSO |
NETIF_F_TSO6;
netdev->features |= netdev->hw_features;
pdata->netdev_features = netdev->features;
netdev->priv_flags |= IFF_UNICAST_FLT;
netdev->min_mtu = 0 ;
netdev->max_mtu = XGMAC_GIANT_PACKET_MTU - XGBE_ETH_FRAME_HDR;
/* Use default watchdog timeout */
netdev->watchdog_timeo = 0 ;
xgbe_init_rx_coalesce(pdata);
xgbe_init_tx_coalesce(pdata);
netif_carrier_off(netdev);
ret = register_netdev(netdev);
if (ret) {
dev_err(dev, "net device registration failed\n" );
return ret;
}
if (IS_REACHABLE(CONFIG_PTP_1588_CLOCK))
xgbe_ptp_register(pdata);
xgbe_debugfs_init(pdata);
netif_dbg(pdata, drv, pdata->netdev, "%u Tx software queues\n" ,
pdata->tx_ring_count);
netif_dbg(pdata, drv, pdata->netdev, "%u Rx software queues\n" ,
pdata->rx_ring_count);
return 0 ;
}
void xgbe_deconfig_netdev(struct xgbe_prv_data *pdata)
{
struct net_device *netdev = pdata->netdev;
xgbe_debugfs_exit(pdata);
if (IS_REACHABLE(CONFIG_PTP_1588_CLOCK))
xgbe_ptp_unregister(pdata);
unregister_netdev(netdev);
pdata->phy_if.phy_exit(pdata);
}
static int xgbe_netdev_event(struct notifier_block *nb, unsigned long event,
void *data)
{
struct net_device *netdev = netdev_notifier_info_to_dev(data);
struct xgbe_prv_data *pdata = netdev_priv(netdev);
if (netdev->netdev_ops != xgbe_get_netdev_ops())
goto out;
switch (event) {
case NETDEV_CHANGENAME:
xgbe_debugfs_rename(pdata);
break ;
default :
break ;
}
out:
return NOTIFY_DONE;
}
static struct notifier_block xgbe_netdev_notifier = {
.notifier_call = xgbe_netdev_event,
};
static int __init xgbe_mod_init(void )
{
int ret;
ret = register_netdevice_notifier(&xgbe_netdev_notifier);
if (ret)
return ret;
ret = xgbe_platform_init();
if (ret)
goto err_platform_init;
ret = xgbe_pci_init();
if (ret)
goto err_pci_init;
return 0 ;
err_pci_init:
xgbe_platform_exit();
err_platform_init:
unregister_netdevice_notifier(&xgbe_netdev_notifier);
return ret;
}
static void __exit xgbe_mod_exit(void )
{
xgbe_pci_exit();
xgbe_platform_exit();
unregister_netdevice_notifier(&xgbe_netdev_notifier);
}
module_init(xgbe_mod_init);
module_exit(xgbe_mod_exit);
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