// SPDX-License-Identifier: GPL-2.0-only
|
/****************************************************************************
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* Driver for Solarflare network controllers and boards
|
* Copyright 2005-2006 Fen Systems Ltd.
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* Copyright 2005-2013 Solarflare Communications Inc.
|
*/
|
|
#include <linux/module.h>
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#include <linux/pci.h>
|
#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
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#include <linux/delay.h>
|
#include <linux/notifier.h>
|
#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <linux/in.h>
|
#include <linux/ethtool.h>
|
#include <linux/topology.h>
|
#include <linux/gfp.h>
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#include <linux/aer.h>
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#include <linux/interrupt.h>
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#include "net_driver.h"
|
#include <net/gre.h>
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#include <net/udp_tunnel.h>
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#include "efx.h"
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#include "efx_common.h"
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#include "efx_channels.h"
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#include "ef100.h"
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#include "rx_common.h"
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#include "tx_common.h"
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#include "nic.h"
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#include "io.h"
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#include "selftest.h"
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#include "sriov.h"
|
|
#include "mcdi_port_common.h"
|
#include "mcdi_pcol.h"
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#include "workarounds.h"
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|
/**************************************************************************
|
*
|
* Configurable values
|
*
|
*************************************************************************/
|
|
module_param_named(interrupt_mode, efx_interrupt_mode, uint, 0444);
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MODULE_PARM_DESC(interrupt_mode,
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"Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
|
|
module_param(rss_cpus, uint, 0444);
|
MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
|
|
/*
|
* Use separate channels for TX and RX events
|
*
|
* Set this to 1 to use separate channels for TX and RX. It allows us
|
* to control interrupt affinity separately for TX and RX.
|
*
|
* This is only used in MSI-X interrupt mode
|
*/
|
bool efx_separate_tx_channels;
|
module_param(efx_separate_tx_channels, bool, 0444);
|
MODULE_PARM_DESC(efx_separate_tx_channels,
|
"Use separate channels for TX and RX");
|
|
/* Initial interrupt moderation settings. They can be modified after
|
* module load with ethtool.
|
*
|
* The default for RX should strike a balance between increasing the
|
* round-trip latency and reducing overhead.
|
*/
|
static unsigned int rx_irq_mod_usec = 60;
|
|
/* Initial interrupt moderation settings. They can be modified after
|
* module load with ethtool.
|
*
|
* This default is chosen to ensure that a 10G link does not go idle
|
* while a TX queue is stopped after it has become full. A queue is
|
* restarted when it drops below half full. The time this takes (assuming
|
* worst case 3 descriptors per packet and 1024 descriptors) is
|
* 512 / 3 * 1.2 = 205 usec.
|
*/
|
static unsigned int tx_irq_mod_usec = 150;
|
|
static bool phy_flash_cfg;
|
module_param(phy_flash_cfg, bool, 0644);
|
MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
|
|
static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
|
NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
|
NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
|
NETIF_MSG_TX_ERR | NETIF_MSG_HW);
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module_param(debug, uint, 0);
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MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
|
|
/**************************************************************************
|
*
|
* Utility functions and prototypes
|
*
|
*************************************************************************/
|
|
static void efx_remove_port(struct efx_nic *efx);
|
static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);
|
static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);
|
static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
|
u32 flags);
|
|
#define EFX_ASSERT_RESET_SERIALISED(efx) \
|
do { \
|
if ((efx->state == STATE_READY) || \
|
(efx->state == STATE_RECOVERY) || \
|
(efx->state == STATE_DISABLED)) \
|
ASSERT_RTNL(); \
|
} while (0)
|
|
/**************************************************************************
|
*
|
* Port handling
|
*
|
**************************************************************************/
|
|
static void efx_fini_port(struct efx_nic *efx);
|
|
static int efx_probe_port(struct efx_nic *efx)
|
{
|
int rc;
|
|
netif_dbg(efx, probe, efx->net_dev, "create port\n");
|
|
if (phy_flash_cfg)
|
efx->phy_mode = PHY_MODE_SPECIAL;
|
|
/* Connect up MAC/PHY operations table */
|
rc = efx->type->probe_port(efx);
|
if (rc)
|
return rc;
|
|
/* Initialise MAC address to permanent address */
|
ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr);
|
|
return 0;
|
}
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|
static int efx_init_port(struct efx_nic *efx)
|
{
|
int rc;
|
|
netif_dbg(efx, drv, efx->net_dev, "init port\n");
|
|
mutex_lock(&efx->mac_lock);
|
|
efx->port_initialized = true;
|
|
/* Ensure the PHY advertises the correct flow control settings */
|
rc = efx_mcdi_port_reconfigure(efx);
|
if (rc && rc != -EPERM)
|
goto fail;
|
|
mutex_unlock(&efx->mac_lock);
|
return 0;
|
|
fail:
|
mutex_unlock(&efx->mac_lock);
|
return rc;
|
}
|
|
static void efx_fini_port(struct efx_nic *efx)
|
{
|
netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
|
|
if (!efx->port_initialized)
|
return;
|
|
efx->port_initialized = false;
|
|
efx->link_state.up = false;
|
efx_link_status_changed(efx);
|
}
|
|
static void efx_remove_port(struct efx_nic *efx)
|
{
|
netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
|
|
efx->type->remove_port(efx);
|
}
|
|
/**************************************************************************
|
*
|
* NIC handling
|
*
|
**************************************************************************/
|
|
static LIST_HEAD(efx_primary_list);
|
static LIST_HEAD(efx_unassociated_list);
|
|
static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
|
{
|
return left->type == right->type &&
|
left->vpd_sn && right->vpd_sn &&
|
!strcmp(left->vpd_sn, right->vpd_sn);
|
}
|
|
static void efx_associate(struct efx_nic *efx)
|
{
|
struct efx_nic *other, *next;
|
|
if (efx->primary == efx) {
|
/* Adding primary function; look for secondaries */
|
|
netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
|
list_add_tail(&efx->node, &efx_primary_list);
|
|
list_for_each_entry_safe(other, next, &efx_unassociated_list,
|
node) {
|
if (efx_same_controller(efx, other)) {
|
list_del(&other->node);
|
netif_dbg(other, probe, other->net_dev,
|
"moving to secondary list of %s %s\n",
|
pci_name(efx->pci_dev),
|
efx->net_dev->name);
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list_add_tail(&other->node,
|
&efx->secondary_list);
|
other->primary = efx;
|
}
|
}
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} else {
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/* Adding secondary function; look for primary */
|
|
list_for_each_entry(other, &efx_primary_list, node) {
|
if (efx_same_controller(efx, other)) {
|
netif_dbg(efx, probe, efx->net_dev,
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"adding to secondary list of %s %s\n",
|
pci_name(other->pci_dev),
|
other->net_dev->name);
|
list_add_tail(&efx->node,
|
&other->secondary_list);
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efx->primary = other;
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return;
|
}
|
}
|
|
netif_dbg(efx, probe, efx->net_dev,
|
"adding to unassociated list\n");
|
list_add_tail(&efx->node, &efx_unassociated_list);
|
}
|
}
|
|
static void efx_dissociate(struct efx_nic *efx)
|
{
|
struct efx_nic *other, *next;
|
|
list_del(&efx->node);
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efx->primary = NULL;
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|
list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
|
list_del(&other->node);
|
netif_dbg(other, probe, other->net_dev,
|
"moving to unassociated list\n");
|
list_add_tail(&other->node, &efx_unassociated_list);
|
other->primary = NULL;
|
}
|
}
|
|
static int efx_probe_nic(struct efx_nic *efx)
|
{
|
int rc;
|
|
netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
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|
/* Carry out hardware-type specific initialisation */
|
rc = efx->type->probe(efx);
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if (rc)
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return rc;
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|
do {
|
if (!efx->max_channels || !efx->max_tx_channels) {
|
netif_err(efx, drv, efx->net_dev,
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"Insufficient resources to allocate"
|
" any channels\n");
|
rc = -ENOSPC;
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goto fail1;
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}
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/* Determine the number of channels and queues by trying
|
* to hook in MSI-X interrupts.
|
*/
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rc = efx_probe_interrupts(efx);
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if (rc)
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goto fail1;
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rc = efx_set_channels(efx);
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if (rc)
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goto fail1;
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|
/* dimension_resources can fail with EAGAIN */
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rc = efx->type->dimension_resources(efx);
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if (rc != 0 && rc != -EAGAIN)
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goto fail2;
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if (rc == -EAGAIN)
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/* try again with new max_channels */
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efx_remove_interrupts(efx);
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} while (rc == -EAGAIN);
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if (efx->n_channels > 1)
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netdev_rss_key_fill(efx->rss_context.rx_hash_key,
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sizeof(efx->rss_context.rx_hash_key));
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efx_set_default_rx_indir_table(efx, &efx->rss_context);
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/* Initialise the interrupt moderation settings */
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efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
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efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
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true);
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return 0;
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fail2:
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efx_remove_interrupts(efx);
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fail1:
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efx->type->remove(efx);
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return rc;
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}
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static void efx_remove_nic(struct efx_nic *efx)
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{
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netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
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efx_remove_interrupts(efx);
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efx->type->remove(efx);
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}
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/**************************************************************************
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*
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* NIC startup/shutdown
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*
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*************************************************************************/
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static int efx_probe_all(struct efx_nic *efx)
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{
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int rc;
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rc = efx_probe_nic(efx);
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if (rc) {
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netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
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goto fail1;
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}
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rc = efx_probe_port(efx);
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if (rc) {
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netif_err(efx, probe, efx->net_dev, "failed to create port\n");
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goto fail2;
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}
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BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
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if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
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rc = -EINVAL;
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goto fail3;
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}
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#ifdef CONFIG_SFC_SRIOV
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rc = efx->type->vswitching_probe(efx);
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if (rc) /* not fatal; the PF will still work fine */
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netif_warn(efx, probe, efx->net_dev,
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"failed to setup vswitching rc=%d;"
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" VFs may not function\n", rc);
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#endif
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rc = efx_probe_filters(efx);
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if (rc) {
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netif_err(efx, probe, efx->net_dev,
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"failed to create filter tables\n");
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goto fail4;
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}
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rc = efx_probe_channels(efx);
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if (rc)
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goto fail5;
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return 0;
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fail5:
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efx_remove_filters(efx);
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fail4:
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#ifdef CONFIG_SFC_SRIOV
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efx->type->vswitching_remove(efx);
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#endif
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fail3:
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efx_remove_port(efx);
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fail2:
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efx_remove_nic(efx);
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fail1:
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return rc;
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}
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static void efx_remove_all(struct efx_nic *efx)
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{
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rtnl_lock();
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efx_xdp_setup_prog(efx, NULL);
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rtnl_unlock();
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|
efx_remove_channels(efx);
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efx_remove_filters(efx);
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#ifdef CONFIG_SFC_SRIOV
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efx->type->vswitching_remove(efx);
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#endif
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efx_remove_port(efx);
|
efx_remove_nic(efx);
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}
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/**************************************************************************
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*
|
* Interrupt moderation
|
*
|
**************************************************************************/
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unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
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{
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if (usecs == 0)
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return 0;
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if (usecs * 1000 < efx->timer_quantum_ns)
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return 1; /* never round down to 0 */
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return usecs * 1000 / efx->timer_quantum_ns;
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}
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unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks)
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{
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/* We must round up when converting ticks to microseconds
|
* because we round down when converting the other way.
|
*/
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return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000);
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}
|
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/* Set interrupt moderation parameters */
|
int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
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unsigned int rx_usecs, bool rx_adaptive,
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bool rx_may_override_tx)
|
{
|
struct efx_channel *channel;
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unsigned int timer_max_us;
|
|
EFX_ASSERT_RESET_SERIALISED(efx);
|
|
timer_max_us = efx->timer_max_ns / 1000;
|
|
if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
|
return -EINVAL;
|
|
if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
|
!rx_may_override_tx) {
|
netif_err(efx, drv, efx->net_dev, "Channels are shared. "
|
"RX and TX IRQ moderation must be equal\n");
|
return -EINVAL;
|
}
|
|
efx->irq_rx_adaptive = rx_adaptive;
|
efx->irq_rx_moderation_us = rx_usecs;
|
efx_for_each_channel(channel, efx) {
|
if (efx_channel_has_rx_queue(channel))
|
channel->irq_moderation_us = rx_usecs;
|
else if (efx_channel_has_tx_queues(channel))
|
channel->irq_moderation_us = tx_usecs;
|
else if (efx_channel_is_xdp_tx(channel))
|
channel->irq_moderation_us = tx_usecs;
|
}
|
|
return 0;
|
}
|
|
void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
|
unsigned int *rx_usecs, bool *rx_adaptive)
|
{
|
*rx_adaptive = efx->irq_rx_adaptive;
|
*rx_usecs = efx->irq_rx_moderation_us;
|
|
/* If channels are shared between RX and TX, so is IRQ
|
* moderation. Otherwise, IRQ moderation is the same for all
|
* TX channels and is not adaptive.
|
*/
|
if (efx->tx_channel_offset == 0) {
|
*tx_usecs = *rx_usecs;
|
} else {
|
struct efx_channel *tx_channel;
|
|
tx_channel = efx->channel[efx->tx_channel_offset];
|
*tx_usecs = tx_channel->irq_moderation_us;
|
}
|
}
|
|
/**************************************************************************
|
*
|
* ioctls
|
*
|
*************************************************************************/
|
|
/* Net device ioctl
|
* Context: process, rtnl_lock() held.
|
*/
|
static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
|
{
|
struct efx_nic *efx = netdev_priv(net_dev);
|
struct mii_ioctl_data *data = if_mii(ifr);
|
|
if (cmd == SIOCSHWTSTAMP)
|
return efx_ptp_set_ts_config(efx, ifr);
|
if (cmd == SIOCGHWTSTAMP)
|
return efx_ptp_get_ts_config(efx, ifr);
|
|
/* Convert phy_id from older PRTAD/DEVAD format */
|
if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
|
(data->phy_id & 0xfc00) == 0x0400)
|
data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
|
|
return mdio_mii_ioctl(&efx->mdio, data, cmd);
|
}
|
|
/**************************************************************************
|
*
|
* Kernel net device interface
|
*
|
*************************************************************************/
|
|
/* Context: process, rtnl_lock() held. */
|
int efx_net_open(struct net_device *net_dev)
|
{
|
struct efx_nic *efx = netdev_priv(net_dev);
|
int rc;
|
|
netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
|
raw_smp_processor_id());
|
|
rc = efx_check_disabled(efx);
|
if (rc)
|
return rc;
|
if (efx->phy_mode & PHY_MODE_SPECIAL)
|
return -EBUSY;
|
if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
|
return -EIO;
|
|
/* Notify the kernel of the link state polled during driver load,
|
* before the monitor starts running */
|
efx_link_status_changed(efx);
|
|
efx_start_all(efx);
|
if (efx->state == STATE_DISABLED || efx->reset_pending)
|
netif_device_detach(efx->net_dev);
|
efx_selftest_async_start(efx);
|
return 0;
|
}
|
|
/* Context: process, rtnl_lock() held.
|
* Note that the kernel will ignore our return code; this method
|
* should really be a void.
|
*/
|
int efx_net_stop(struct net_device *net_dev)
|
{
|
struct efx_nic *efx = netdev_priv(net_dev);
|
|
netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
|
raw_smp_processor_id());
|
|
/* Stop the device and flush all the channels */
|
efx_stop_all(efx);
|
|
return 0;
|
}
|
|
static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
|
{
|
struct efx_nic *efx = netdev_priv(net_dev);
|
|
if (efx->type->vlan_rx_add_vid)
|
return efx->type->vlan_rx_add_vid(efx, proto, vid);
|
else
|
return -EOPNOTSUPP;
|
}
|
|
static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
|
{
|
struct efx_nic *efx = netdev_priv(net_dev);
|
|
if (efx->type->vlan_rx_kill_vid)
|
return efx->type->vlan_rx_kill_vid(efx, proto, vid);
|
else
|
return -EOPNOTSUPP;
|
}
|
|
static const struct net_device_ops efx_netdev_ops = {
|
.ndo_open = efx_net_open,
|
.ndo_stop = efx_net_stop,
|
.ndo_get_stats64 = efx_net_stats,
|
.ndo_tx_timeout = efx_watchdog,
|
.ndo_start_xmit = efx_hard_start_xmit,
|
.ndo_validate_addr = eth_validate_addr,
|
.ndo_do_ioctl = efx_ioctl,
|
.ndo_change_mtu = efx_change_mtu,
|
.ndo_set_mac_address = efx_set_mac_address,
|
.ndo_set_rx_mode = efx_set_rx_mode,
|
.ndo_set_features = efx_set_features,
|
.ndo_features_check = efx_features_check,
|
.ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
|
.ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
|
#ifdef CONFIG_SFC_SRIOV
|
.ndo_set_vf_mac = efx_sriov_set_vf_mac,
|
.ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
|
.ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
|
.ndo_get_vf_config = efx_sriov_get_vf_config,
|
.ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
|
#endif
|
.ndo_get_phys_port_id = efx_get_phys_port_id,
|
.ndo_get_phys_port_name = efx_get_phys_port_name,
|
.ndo_setup_tc = efx_setup_tc,
|
#ifdef CONFIG_RFS_ACCEL
|
.ndo_rx_flow_steer = efx_filter_rfs,
|
#endif
|
.ndo_udp_tunnel_add = udp_tunnel_nic_add_port,
|
.ndo_udp_tunnel_del = udp_tunnel_nic_del_port,
|
.ndo_xdp_xmit = efx_xdp_xmit,
|
.ndo_bpf = efx_xdp
|
};
|
|
static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)
|
{
|
struct bpf_prog *old_prog;
|
|
if (efx->xdp_rxq_info_failed) {
|
netif_err(efx, drv, efx->net_dev,
|
"Unable to bind XDP program due to previous failure of rxq_info\n");
|
return -EINVAL;
|
}
|
|
if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) {
|
netif_err(efx, drv, efx->net_dev,
|
"Unable to configure XDP with MTU of %d (max: %d)\n",
|
efx->net_dev->mtu, efx_xdp_max_mtu(efx));
|
return -EINVAL;
|
}
|
|
old_prog = rtnl_dereference(efx->xdp_prog);
|
rcu_assign_pointer(efx->xdp_prog, prog);
|
/* Release the reference that was originally passed by the caller. */
|
if (old_prog)
|
bpf_prog_put(old_prog);
|
|
return 0;
|
}
|
|
/* Context: process, rtnl_lock() held. */
|
static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
|
{
|
struct efx_nic *efx = netdev_priv(dev);
|
|
switch (xdp->command) {
|
case XDP_SETUP_PROG:
|
return efx_xdp_setup_prog(efx, xdp->prog);
|
default:
|
return -EINVAL;
|
}
|
}
|
|
static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
|
u32 flags)
|
{
|
struct efx_nic *efx = netdev_priv(dev);
|
|
if (!netif_running(dev))
|
return -EINVAL;
|
|
return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
|
}
|
|
static void efx_update_name(struct efx_nic *efx)
|
{
|
strcpy(efx->name, efx->net_dev->name);
|
efx_mtd_rename(efx);
|
efx_set_channel_names(efx);
|
}
|
|
static int efx_netdev_event(struct notifier_block *this,
|
unsigned long event, void *ptr)
|
{
|
struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
|
|
if ((net_dev->netdev_ops == &efx_netdev_ops) &&
|
event == NETDEV_CHANGENAME)
|
efx_update_name(netdev_priv(net_dev));
|
|
return NOTIFY_DONE;
|
}
|
|
static struct notifier_block efx_netdev_notifier = {
|
.notifier_call = efx_netdev_event,
|
};
|
|
static ssize_t
|
show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
|
{
|
struct efx_nic *efx = dev_get_drvdata(dev);
|
return sprintf(buf, "%d\n", efx->phy_type);
|
}
|
static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL);
|
|
static int efx_register_netdev(struct efx_nic *efx)
|
{
|
struct net_device *net_dev = efx->net_dev;
|
struct efx_channel *channel;
|
int rc;
|
|
net_dev->watchdog_timeo = 5 * HZ;
|
net_dev->irq = efx->pci_dev->irq;
|
net_dev->netdev_ops = &efx_netdev_ops;
|
if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
|
net_dev->priv_flags |= IFF_UNICAST_FLT;
|
net_dev->ethtool_ops = &efx_ethtool_ops;
|
net_dev->gso_max_segs = EFX_TSO_MAX_SEGS;
|
net_dev->min_mtu = EFX_MIN_MTU;
|
net_dev->max_mtu = EFX_MAX_MTU;
|
|
rtnl_lock();
|
|
/* Enable resets to be scheduled and check whether any were
|
* already requested. If so, the NIC is probably hosed so we
|
* abort.
|
*/
|
efx->state = STATE_READY;
|
smp_mb(); /* ensure we change state before checking reset_pending */
|
if (efx->reset_pending) {
|
netif_err(efx, probe, efx->net_dev,
|
"aborting probe due to scheduled reset\n");
|
rc = -EIO;
|
goto fail_locked;
|
}
|
|
rc = dev_alloc_name(net_dev, net_dev->name);
|
if (rc < 0)
|
goto fail_locked;
|
efx_update_name(efx);
|
|
/* Always start with carrier off; PHY events will detect the link */
|
netif_carrier_off(net_dev);
|
|
rc = register_netdevice(net_dev);
|
if (rc)
|
goto fail_locked;
|
|
efx_for_each_channel(channel, efx) {
|
struct efx_tx_queue *tx_queue;
|
efx_for_each_channel_tx_queue(tx_queue, channel)
|
efx_init_tx_queue_core_txq(tx_queue);
|
}
|
|
efx_associate(efx);
|
|
rtnl_unlock();
|
|
rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
|
if (rc) {
|
netif_err(efx, drv, efx->net_dev,
|
"failed to init net dev attributes\n");
|
goto fail_registered;
|
}
|
|
efx_init_mcdi_logging(efx);
|
|
return 0;
|
|
fail_registered:
|
rtnl_lock();
|
efx_dissociate(efx);
|
unregister_netdevice(net_dev);
|
fail_locked:
|
efx->state = STATE_UNINIT;
|
rtnl_unlock();
|
netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
|
return rc;
|
}
|
|
static void efx_unregister_netdev(struct efx_nic *efx)
|
{
|
if (!efx->net_dev)
|
return;
|
|
BUG_ON(netdev_priv(efx->net_dev) != efx);
|
|
if (efx_dev_registered(efx)) {
|
strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
|
efx_fini_mcdi_logging(efx);
|
device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
|
unregister_netdev(efx->net_dev);
|
}
|
}
|
|
/**************************************************************************
|
*
|
* List of NICs we support
|
*
|
**************************************************************************/
|
|
/* PCI device ID table */
|
static const struct pci_device_id efx_pci_table[] = {
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
|
.driver_data = (unsigned long) &siena_a0_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
|
.driver_data = (unsigned long) &siena_a0_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */
|
.driver_data = (unsigned long) &efx_hunt_a0_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */
|
.driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */
|
.driver_data = (unsigned long) &efx_hunt_a0_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */
|
.driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */
|
.driver_data = (unsigned long) &efx_hunt_a0_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */
|
.driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */
|
.driver_data = (unsigned long) &efx_hunt_a0_nic_type},
|
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */
|
.driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
|
{0} /* end of list */
|
};
|
|
/**************************************************************************
|
*
|
* Data housekeeping
|
*
|
**************************************************************************/
|
|
void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
|
{
|
u64 n_rx_nodesc_trunc = 0;
|
struct efx_channel *channel;
|
|
efx_for_each_channel(channel, efx)
|
n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
|
stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
|
stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
|
}
|
|
/**************************************************************************
|
*
|
* PCI interface
|
*
|
**************************************************************************/
|
|
/* Main body of final NIC shutdown code
|
* This is called only at module unload (or hotplug removal).
|
*/
|
static void efx_pci_remove_main(struct efx_nic *efx)
|
{
|
/* Flush reset_work. It can no longer be scheduled since we
|
* are not READY.
|
*/
|
BUG_ON(efx->state == STATE_READY);
|
efx_flush_reset_workqueue(efx);
|
|
efx_disable_interrupts(efx);
|
efx_clear_interrupt_affinity(efx);
|
efx_nic_fini_interrupt(efx);
|
efx_fini_port(efx);
|
efx->type->fini(efx);
|
efx_fini_napi(efx);
|
efx_remove_all(efx);
|
}
|
|
/* Final NIC shutdown
|
* This is called only at module unload (or hotplug removal). A PF can call
|
* this on its VFs to ensure they are unbound first.
|
*/
|
static void efx_pci_remove(struct pci_dev *pci_dev)
|
{
|
struct efx_nic *efx;
|
|
efx = pci_get_drvdata(pci_dev);
|
if (!efx)
|
return;
|
|
/* Mark the NIC as fini, then stop the interface */
|
rtnl_lock();
|
efx_dissociate(efx);
|
dev_close(efx->net_dev);
|
efx_disable_interrupts(efx);
|
efx->state = STATE_UNINIT;
|
rtnl_unlock();
|
|
if (efx->type->sriov_fini)
|
efx->type->sriov_fini(efx);
|
|
efx_unregister_netdev(efx);
|
|
efx_mtd_remove(efx);
|
|
efx_pci_remove_main(efx);
|
|
efx_fini_io(efx);
|
netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
|
|
efx_fini_struct(efx);
|
free_netdev(efx->net_dev);
|
|
pci_disable_pcie_error_reporting(pci_dev);
|
};
|
|
/* NIC VPD information
|
* Called during probe to display the part number of the
|
* installed NIC. VPD is potentially very large but this should
|
* always appear within the first 512 bytes.
|
*/
|
#define SFC_VPD_LEN 512
|
static void efx_probe_vpd_strings(struct efx_nic *efx)
|
{
|
struct pci_dev *dev = efx->pci_dev;
|
char vpd_data[SFC_VPD_LEN];
|
ssize_t vpd_size;
|
int ro_start, ro_size, i, j;
|
|
/* Get the vpd data from the device */
|
vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
|
if (vpd_size <= 0) {
|
netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n");
|
return;
|
}
|
|
/* Get the Read only section */
|
ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
|
if (ro_start < 0) {
|
netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
|
return;
|
}
|
|
ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]);
|
j = ro_size;
|
i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
|
if (i + j > vpd_size)
|
j = vpd_size - i;
|
|
/* Get the Part number */
|
i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
|
if (i < 0) {
|
netif_err(efx, drv, efx->net_dev, "Part number not found\n");
|
return;
|
}
|
|
j = pci_vpd_info_field_size(&vpd_data[i]);
|
i += PCI_VPD_INFO_FLD_HDR_SIZE;
|
if (i + j > vpd_size) {
|
netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
|
return;
|
}
|
|
netif_info(efx, drv, efx->net_dev,
|
"Part Number : %.*s\n", j, &vpd_data[i]);
|
|
i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
|
j = ro_size;
|
i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN");
|
if (i < 0) {
|
netif_err(efx, drv, efx->net_dev, "Serial number not found\n");
|
return;
|
}
|
|
j = pci_vpd_info_field_size(&vpd_data[i]);
|
i += PCI_VPD_INFO_FLD_HDR_SIZE;
|
if (i + j > vpd_size) {
|
netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n");
|
return;
|
}
|
|
efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL);
|
if (!efx->vpd_sn)
|
return;
|
|
snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]);
|
}
|
|
|
/* Main body of NIC initialisation
|
* This is called at module load (or hotplug insertion, theoretically).
|
*/
|
static int efx_pci_probe_main(struct efx_nic *efx)
|
{
|
int rc;
|
|
/* Do start-of-day initialisation */
|
rc = efx_probe_all(efx);
|
if (rc)
|
goto fail1;
|
|
efx_init_napi(efx);
|
|
down_write(&efx->filter_sem);
|
rc = efx->type->init(efx);
|
up_write(&efx->filter_sem);
|
if (rc) {
|
netif_err(efx, probe, efx->net_dev,
|
"failed to initialise NIC\n");
|
goto fail3;
|
}
|
|
rc = efx_init_port(efx);
|
if (rc) {
|
netif_err(efx, probe, efx->net_dev,
|
"failed to initialise port\n");
|
goto fail4;
|
}
|
|
rc = efx_nic_init_interrupt(efx);
|
if (rc)
|
goto fail5;
|
|
efx_set_interrupt_affinity(efx);
|
rc = efx_enable_interrupts(efx);
|
if (rc)
|
goto fail6;
|
|
return 0;
|
|
fail6:
|
efx_clear_interrupt_affinity(efx);
|
efx_nic_fini_interrupt(efx);
|
fail5:
|
efx_fini_port(efx);
|
fail4:
|
efx->type->fini(efx);
|
fail3:
|
efx_fini_napi(efx);
|
efx_remove_all(efx);
|
fail1:
|
return rc;
|
}
|
|
static int efx_pci_probe_post_io(struct efx_nic *efx)
|
{
|
struct net_device *net_dev = efx->net_dev;
|
int rc = efx_pci_probe_main(efx);
|
|
if (rc)
|
return rc;
|
|
if (efx->type->sriov_init) {
|
rc = efx->type->sriov_init(efx);
|
if (rc)
|
netif_err(efx, probe, efx->net_dev,
|
"SR-IOV can't be enabled rc %d\n", rc);
|
}
|
|
/* Determine netdevice features */
|
net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
|
NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL);
|
if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
|
net_dev->features |= NETIF_F_TSO6;
|
/* Check whether device supports TSO */
|
if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
|
net_dev->features &= ~NETIF_F_ALL_TSO;
|
/* Mask for features that also apply to VLAN devices */
|
net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
|
NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
|
NETIF_F_RXCSUM);
|
|
net_dev->hw_features |= net_dev->features & ~efx->fixed_features;
|
|
/* Disable receiving frames with bad FCS, by default. */
|
net_dev->features &= ~NETIF_F_RXALL;
|
|
/* Disable VLAN filtering by default. It may be enforced if
|
* the feature is fixed (i.e. VLAN filters are required to
|
* receive VLAN tagged packets due to vPort restrictions).
|
*/
|
net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
|
net_dev->features |= efx->fixed_features;
|
|
rc = efx_register_netdev(efx);
|
if (!rc)
|
return 0;
|
|
efx_pci_remove_main(efx);
|
return rc;
|
}
|
|
/* NIC initialisation
|
*
|
* This is called at module load (or hotplug insertion,
|
* theoretically). It sets up PCI mappings, resets the NIC,
|
* sets up and registers the network devices with the kernel and hooks
|
* the interrupt service routine. It does not prepare the device for
|
* transmission; this is left to the first time one of the network
|
* interfaces is brought up (i.e. efx_net_open).
|
*/
|
static int efx_pci_probe(struct pci_dev *pci_dev,
|
const struct pci_device_id *entry)
|
{
|
struct net_device *net_dev;
|
struct efx_nic *efx;
|
int rc;
|
|
/* Allocate and initialise a struct net_device and struct efx_nic */
|
net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
|
EFX_MAX_RX_QUEUES);
|
if (!net_dev)
|
return -ENOMEM;
|
efx = netdev_priv(net_dev);
|
efx->type = (const struct efx_nic_type *) entry->driver_data;
|
efx->fixed_features |= NETIF_F_HIGHDMA;
|
|
pci_set_drvdata(pci_dev, efx);
|
SET_NETDEV_DEV(net_dev, &pci_dev->dev);
|
rc = efx_init_struct(efx, pci_dev, net_dev);
|
if (rc)
|
goto fail1;
|
|
netif_info(efx, probe, efx->net_dev,
|
"Solarflare NIC detected\n");
|
|
if (!efx->type->is_vf)
|
efx_probe_vpd_strings(efx);
|
|
/* Set up basic I/O (BAR mappings etc) */
|
rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask,
|
efx->type->mem_map_size(efx));
|
if (rc)
|
goto fail2;
|
|
rc = efx_pci_probe_post_io(efx);
|
if (rc) {
|
/* On failure, retry once immediately.
|
* If we aborted probe due to a scheduled reset, dismiss it.
|
*/
|
efx->reset_pending = 0;
|
rc = efx_pci_probe_post_io(efx);
|
if (rc) {
|
/* On another failure, retry once more
|
* after a 50-305ms delay.
|
*/
|
unsigned char r;
|
|
get_random_bytes(&r, 1);
|
msleep((unsigned int)r + 50);
|
efx->reset_pending = 0;
|
rc = efx_pci_probe_post_io(efx);
|
}
|
}
|
if (rc)
|
goto fail3;
|
|
netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
|
|
/* Try to create MTDs, but allow this to fail */
|
rtnl_lock();
|
rc = efx_mtd_probe(efx);
|
rtnl_unlock();
|
if (rc && rc != -EPERM)
|
netif_warn(efx, probe, efx->net_dev,
|
"failed to create MTDs (%d)\n", rc);
|
|
(void)pci_enable_pcie_error_reporting(pci_dev);
|
|
if (efx->type->udp_tnl_push_ports)
|
efx->type->udp_tnl_push_ports(efx);
|
|
return 0;
|
|
fail3:
|
efx_fini_io(efx);
|
fail2:
|
efx_fini_struct(efx);
|
fail1:
|
WARN_ON(rc > 0);
|
netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
|
free_netdev(net_dev);
|
return rc;
|
}
|
|
/* efx_pci_sriov_configure returns the actual number of Virtual Functions
|
* enabled on success
|
*/
|
#ifdef CONFIG_SFC_SRIOV
|
static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
|
{
|
int rc;
|
struct efx_nic *efx = pci_get_drvdata(dev);
|
|
if (efx->type->sriov_configure) {
|
rc = efx->type->sriov_configure(efx, num_vfs);
|
if (rc)
|
return rc;
|
else
|
return num_vfs;
|
} else
|
return -EOPNOTSUPP;
|
}
|
#endif
|
|
static int efx_pm_freeze(struct device *dev)
|
{
|
struct efx_nic *efx = dev_get_drvdata(dev);
|
|
rtnl_lock();
|
|
if (efx->state != STATE_DISABLED) {
|
efx->state = STATE_UNINIT;
|
|
efx_device_detach_sync(efx);
|
|
efx_stop_all(efx);
|
efx_disable_interrupts(efx);
|
}
|
|
rtnl_unlock();
|
|
return 0;
|
}
|
|
static int efx_pm_thaw(struct device *dev)
|
{
|
int rc;
|
struct efx_nic *efx = dev_get_drvdata(dev);
|
|
rtnl_lock();
|
|
if (efx->state != STATE_DISABLED) {
|
rc = efx_enable_interrupts(efx);
|
if (rc)
|
goto fail;
|
|
mutex_lock(&efx->mac_lock);
|
efx_mcdi_port_reconfigure(efx);
|
mutex_unlock(&efx->mac_lock);
|
|
efx_start_all(efx);
|
|
efx_device_attach_if_not_resetting(efx);
|
|
efx->state = STATE_READY;
|
|
efx->type->resume_wol(efx);
|
}
|
|
rtnl_unlock();
|
|
/* Reschedule any quenched resets scheduled during efx_pm_freeze() */
|
efx_queue_reset_work(efx);
|
|
return 0;
|
|
fail:
|
rtnl_unlock();
|
|
return rc;
|
}
|
|
static int efx_pm_poweroff(struct device *dev)
|
{
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
struct efx_nic *efx = pci_get_drvdata(pci_dev);
|
|
efx->type->fini(efx);
|
|
efx->reset_pending = 0;
|
|
pci_save_state(pci_dev);
|
return pci_set_power_state(pci_dev, PCI_D3hot);
|
}
|
|
/* Used for both resume and restore */
|
static int efx_pm_resume(struct device *dev)
|
{
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
struct efx_nic *efx = pci_get_drvdata(pci_dev);
|
int rc;
|
|
rc = pci_set_power_state(pci_dev, PCI_D0);
|
if (rc)
|
return rc;
|
pci_restore_state(pci_dev);
|
rc = pci_enable_device(pci_dev);
|
if (rc)
|
return rc;
|
pci_set_master(efx->pci_dev);
|
rc = efx->type->reset(efx, RESET_TYPE_ALL);
|
if (rc)
|
return rc;
|
down_write(&efx->filter_sem);
|
rc = efx->type->init(efx);
|
up_write(&efx->filter_sem);
|
if (rc)
|
return rc;
|
rc = efx_pm_thaw(dev);
|
return rc;
|
}
|
|
static int efx_pm_suspend(struct device *dev)
|
{
|
int rc;
|
|
efx_pm_freeze(dev);
|
rc = efx_pm_poweroff(dev);
|
if (rc)
|
efx_pm_resume(dev);
|
return rc;
|
}
|
|
static const struct dev_pm_ops efx_pm_ops = {
|
.suspend = efx_pm_suspend,
|
.resume = efx_pm_resume,
|
.freeze = efx_pm_freeze,
|
.thaw = efx_pm_thaw,
|
.poweroff = efx_pm_poweroff,
|
.restore = efx_pm_resume,
|
};
|
|
static struct pci_driver efx_pci_driver = {
|
.name = KBUILD_MODNAME,
|
.id_table = efx_pci_table,
|
.probe = efx_pci_probe,
|
.remove = efx_pci_remove,
|
.driver.pm = &efx_pm_ops,
|
.err_handler = &efx_err_handlers,
|
#ifdef CONFIG_SFC_SRIOV
|
.sriov_configure = efx_pci_sriov_configure,
|
#endif
|
};
|
|
/**************************************************************************
|
*
|
* Kernel module interface
|
*
|
*************************************************************************/
|
|
static int __init efx_init_module(void)
|
{
|
int rc;
|
|
printk(KERN_INFO "Solarflare NET driver\n");
|
|
rc = register_netdevice_notifier(&efx_netdev_notifier);
|
if (rc)
|
goto err_notifier;
|
|
#ifdef CONFIG_SFC_SRIOV
|
rc = efx_init_sriov();
|
if (rc)
|
goto err_sriov;
|
#endif
|
|
rc = efx_create_reset_workqueue();
|
if (rc)
|
goto err_reset;
|
|
rc = pci_register_driver(&efx_pci_driver);
|
if (rc < 0)
|
goto err_pci;
|
|
rc = pci_register_driver(&ef100_pci_driver);
|
if (rc < 0)
|
goto err_pci_ef100;
|
|
return 0;
|
|
err_pci_ef100:
|
pci_unregister_driver(&efx_pci_driver);
|
err_pci:
|
efx_destroy_reset_workqueue();
|
err_reset:
|
#ifdef CONFIG_SFC_SRIOV
|
efx_fini_sriov();
|
err_sriov:
|
#endif
|
unregister_netdevice_notifier(&efx_netdev_notifier);
|
err_notifier:
|
return rc;
|
}
|
|
static void __exit efx_exit_module(void)
|
{
|
printk(KERN_INFO "Solarflare NET driver unloading\n");
|
|
pci_unregister_driver(&ef100_pci_driver);
|
pci_unregister_driver(&efx_pci_driver);
|
efx_destroy_reset_workqueue();
|
#ifdef CONFIG_SFC_SRIOV
|
efx_fini_sriov();
|
#endif
|
unregister_netdevice_notifier(&efx_netdev_notifier);
|
|
}
|
|
module_init(efx_init_module);
|
module_exit(efx_exit_module);
|
|
MODULE_AUTHOR("Solarflare Communications and "
|
"Michael Brown <mbrown@fensystems.co.uk>");
|
MODULE_DESCRIPTION("Solarflare network driver");
|
MODULE_LICENSE("GPL");
|
MODULE_DEVICE_TABLE(pci, efx_pci_table);
|
