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kcompat.c
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kcompat.c
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// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */
#include "fm10k.h"
#include "kcompat.h"
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4) )
int _kc_scnprintf(char * buf, size_t size, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
i = vsnprintf(buf, size, fmt, args);
va_end(args);
return (i >= size) ? (size - 1) : i;
}
#endif /* < 2.6.4 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10) )
DECLARE_BITMAP(_kcompat_node_online_map, MAX_NUMNODES) = {1};
#endif /* < 2.6.10 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13) )
char *_kc_kstrdup(const char *s, unsigned int gfp)
{
size_t len;
char *buf;
if (!s)
return NULL;
len = strlen(s) + 1;
buf = kmalloc(len, gfp);
if (buf)
memcpy(buf, s, len);
return buf;
}
#endif /* < 2.6.13 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14) )
void *_kc_kzalloc(size_t size, int flags)
{
void *ret = kmalloc(size, flags);
if (ret)
memset(ret, 0, size);
return ret;
}
#endif /* <= 2.6.13 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) )
int _kc_skb_pad(struct sk_buff *skb, int pad)
{
int ntail;
/* If the skbuff is non linear tailroom is always zero.. */
if(!skb_cloned(skb) && skb_tailroom(skb) >= pad) {
memset(skb->data+skb->len, 0, pad);
return 0;
}
ntail = skb->data_len + pad - (skb->end - skb->tail);
if (likely(skb_cloned(skb) || ntail > 0)) {
if (pskb_expand_head(skb, 0, ntail, GFP_ATOMIC))
goto free_skb;
}
#ifdef MAX_SKB_FRAGS
if (skb_is_nonlinear(skb) &&
!__pskb_pull_tail(skb, skb->data_len))
goto free_skb;
#endif
memset(skb->data + skb->len, 0, pad);
return 0;
free_skb:
kfree_skb(skb);
return -ENOMEM;
}
#if (!(RHEL_RELEASE_CODE && RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(5,4)))
int _kc_pci_save_state(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct adapter_struct *adapter = netdev_priv(netdev);
int size = PCI_CONFIG_SPACE_LEN, i;
u16 pcie_cap_offset, pcie_link_status;
#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0) )
/* no ->dev for 2.4 kernels */
WARN_ON(pdev->dev.driver_data == NULL);
#endif
pcie_cap_offset = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (pcie_cap_offset) {
if (!pci_read_config_word(pdev,
pcie_cap_offset + PCIE_LINK_STATUS,
&pcie_link_status))
size = PCIE_CONFIG_SPACE_LEN;
}
pci_config_space_ich8lan();
#ifdef HAVE_PCI_ERS
if (adapter->config_space == NULL)
#else
WARN_ON(adapter->config_space != NULL);
#endif
adapter->config_space = kmalloc(size, GFP_KERNEL);
if (!adapter->config_space) {
printk(KERN_ERR "Out of memory in pci_save_state\n");
return -ENOMEM;
}
for (i = 0; i < (size / 4); i++)
pci_read_config_dword(pdev, i * 4, &adapter->config_space[i]);
return 0;
}
void _kc_pci_restore_state(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct adapter_struct *adapter = netdev_priv(netdev);
int size = PCI_CONFIG_SPACE_LEN, i;
u16 pcie_cap_offset;
u16 pcie_link_status;
if (adapter->config_space != NULL) {
pcie_cap_offset = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (pcie_cap_offset &&
!pci_read_config_word(pdev,
pcie_cap_offset + PCIE_LINK_STATUS,
&pcie_link_status))
size = PCIE_CONFIG_SPACE_LEN;
pci_config_space_ich8lan();
for (i = 0; i < (size / 4); i++)
pci_write_config_dword(pdev, i * 4, adapter->config_space[i]);
#ifndef HAVE_PCI_ERS
kfree(adapter->config_space);
adapter->config_space = NULL;
#endif
}
}
#endif /* !(RHEL_RELEASE_CODE >= RHEL 5.4) */
#ifdef HAVE_PCI_ERS
void _kc_free_netdev(struct net_device *netdev)
{
struct adapter_struct *adapter = netdev_priv(netdev);
kfree(adapter->config_space);
#ifdef CONFIG_SYSFS
if (netdev->reg_state == NETREG_UNINITIALIZED) {
kfree((char *)netdev - netdev->padded);
} else {
BUG_ON(netdev->reg_state != NETREG_UNREGISTERED);
netdev->reg_state = NETREG_RELEASED;
class_device_put(&netdev->class_dev);
}
#else
kfree((char *)netdev - netdev->padded);
#endif
}
#endif
void *_kc_kmemdup(const void *src, size_t len, unsigned gfp)
{
void *p;
p = kzalloc(len, gfp);
if (p)
memcpy(p, src, len);
return p;
}
#endif /* <= 2.6.19 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21) )
struct pci_dev *_kc_netdev_to_pdev(struct net_device *netdev)
{
return ((struct adapter_struct *)netdev_priv(netdev))->pdev;
}
#endif /* < 2.6.21 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22) )
/* hexdump code taken from lib/hexdump.c */
static void _kc_hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
int groupsize, unsigned char *linebuf,
size_t linebuflen, bool ascii)
{
const u8 *ptr = buf;
u8 ch;
int j, lx = 0;
int ascii_column;
if (rowsize != 16 && rowsize != 32)
rowsize = 16;
if (!len)
goto nil;
if (len > rowsize) /* limit to one line at a time */
len = rowsize;
if ((len % groupsize) != 0) /* no mixed size output */
groupsize = 1;
switch (groupsize) {
case 8: {
const u64 *ptr8 = buf;
int ngroups = len / groupsize;
for (j = 0; j < ngroups; j++)
lx += scnprintf((char *)(linebuf + lx), linebuflen - lx,
"%s%16.16llx", j ? " " : "",
(unsigned long long)*(ptr8 + j));
ascii_column = 17 * ngroups + 2;
break;
}
case 4: {
const u32 *ptr4 = buf;
int ngroups = len / groupsize;
for (j = 0; j < ngroups; j++)
lx += scnprintf((char *)(linebuf + lx), linebuflen - lx,
"%s%8.8x", j ? " " : "", *(ptr4 + j));
ascii_column = 9 * ngroups + 2;
break;
}
case 2: {
const u16 *ptr2 = buf;
int ngroups = len / groupsize;
for (j = 0; j < ngroups; j++)
lx += scnprintf((char *)(linebuf + lx), linebuflen - lx,
"%s%4.4x", j ? " " : "", *(ptr2 + j));
ascii_column = 5 * ngroups + 2;
break;
}
default:
for (j = 0; (j < len) && (lx + 3) <= linebuflen; j++) {
ch = ptr[j];
linebuf[lx++] = hex_asc(ch >> 4);
linebuf[lx++] = hex_asc(ch & 0x0f);
linebuf[lx++] = ' ';
}
if (j)
lx--;
ascii_column = 3 * rowsize + 2;
break;
}
if (!ascii)
goto nil;
while (lx < (linebuflen - 1) && lx < (ascii_column - 1))
linebuf[lx++] = ' ';
for (j = 0; (j < len) && (lx + 2) < linebuflen; j++)
linebuf[lx++] = (isascii(ptr[j]) && isprint(ptr[j])) ? ptr[j]
: '.';
nil:
linebuf[lx++] = '\0';
}
void _kc_print_hex_dump(const char *level,
const char *prefix_str, int prefix_type,
int rowsize, int groupsize,
const void *buf, size_t len, bool ascii)
{
const u8 *ptr = buf;
int i, linelen, remaining = len;
unsigned char linebuf[200];
if (rowsize != 16 && rowsize != 32)
rowsize = 16;
for (i = 0; i < len; i += rowsize) {
linelen = min(remaining, rowsize);
remaining -= rowsize;
_kc_hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
linebuf, sizeof(linebuf), ascii);
switch (prefix_type) {
case DUMP_PREFIX_ADDRESS:
printk("%s%s%*p: %s\n", level, prefix_str,
(int)(2 * sizeof(void *)), ptr + i, linebuf);
break;
case DUMP_PREFIX_OFFSET:
printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf);
break;
default:
printk("%s%s%s\n", level, prefix_str, linebuf);
break;
}
}
}
#endif /* < 2.6.22 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) )
#ifdef NAPI
int __kc_adapter_clean(struct net_device *netdev, int *budget)
{
int work_done;
int work_to_do = min(*budget, netdev->quota);
struct adapter_struct *adapter = netdev_priv(netdev);
struct napi_struct *napi = &adapter->rx_ring[0].napi;
work_done = napi->poll(napi, work_to_do);
*budget -= work_done;
netdev->quota -= work_done;
return (work_done >= work_to_do) ? 1 : 0;
}
#endif /* NAPI */
#endif /* <= 2.6.24 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26) )
void _kc_pci_disable_link_state(struct pci_dev *pdev, int state)
{
struct pci_dev *parent = pdev->bus->self;
u16 link_state;
int pos;
if (!parent)
return;
pos = pci_find_capability(parent, PCI_CAP_ID_EXP);
if (pos) {
pci_read_config_word(parent, pos + PCI_EXP_LNKCTL, &link_state);
link_state &= ~state;
pci_write_config_word(parent, pos + PCI_EXP_LNKCTL, link_state);
}
}
#endif /* < 2.6.26 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) )
#ifdef HAVE_TX_MQ
void _kc_netif_tx_stop_all_queues(struct net_device *netdev)
{
struct adapter_struct *adapter = netdev_priv(netdev);
int i;
netif_stop_queue(netdev);
if (netif_is_multiqueue(netdev))
for (i = 0; i < adapter->num_tx_queues; i++)
netif_stop_subqueue(netdev, i);
}
void _kc_netif_tx_wake_all_queues(struct net_device *netdev)
{
struct adapter_struct *adapter = netdev_priv(netdev);
int i;
netif_wake_queue(netdev);
if (netif_is_multiqueue(netdev))
for (i = 0; i < adapter->num_tx_queues; i++)
netif_wake_subqueue(netdev, i);
}
void _kc_netif_tx_start_all_queues(struct net_device *netdev)
{
struct adapter_struct *adapter = netdev_priv(netdev);
int i;
netif_start_queue(netdev);
if (netif_is_multiqueue(netdev))
for (i = 0; i < adapter->num_tx_queues; i++)
netif_start_subqueue(netdev, i);
}
#endif /* HAVE_TX_MQ */
void __kc_warn_slowpath(const char *file, int line, const char *fmt, ...)
{
va_list args;
printk(KERN_WARNING "------------[ cut here ]------------\n");
printk(KERN_WARNING "WARNING: at %s:%d \n", file, line);
va_start(args, fmt);
vprintk(fmt, args);
va_end(args);
dump_stack();
}
#endif /* __VMKLNX__ */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) )
int
_kc_pci_prepare_to_sleep(struct pci_dev *dev)
{
pci_power_t target_state;
int error;
target_state = pci_choose_state(dev, PMSG_SUSPEND);
pci_enable_wake(dev, target_state, true);
error = pci_set_power_state(dev, target_state);
if (error)
pci_enable_wake(dev, target_state, false);
return error;
}
int
_kc_pci_wake_from_d3(struct pci_dev *dev, bool enable)
{
int err;
err = pci_enable_wake(dev, PCI_D3cold, enable);
if (err)
goto out;
err = pci_enable_wake(dev, PCI_D3hot, enable);
out:
return err;
}
#endif /* < 2.6.28 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29) )
static void __kc_pci_set_master(struct pci_dev *pdev, bool enable)
{
u16 old_cmd, cmd;
pci_read_config_word(pdev, PCI_COMMAND, &old_cmd);
if (enable)
cmd = old_cmd | PCI_COMMAND_MASTER;
else
cmd = old_cmd & ~PCI_COMMAND_MASTER;
if (cmd != old_cmd) {
dev_dbg(pci_dev_to_dev(pdev), "%s bus mastering\n",
enable ? "enabling" : "disabling");
pci_write_config_word(pdev, PCI_COMMAND, cmd);
}
#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,7) )
pdev->is_busmaster = enable;
#endif
}
void _kc_pci_clear_master(struct pci_dev *dev)
{
__kc_pci_set_master(dev, false);
}
#endif /* < 2.6.29 */
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34) )
#if (RHEL_RELEASE_CODE < RHEL_RELEASE_VERSION(6,0))
int _kc_pci_num_vf(struct pci_dev __maybe_unused *dev)
{
int num_vf = 0;
#ifdef CONFIG_PCI_IOV
struct pci_dev *vfdev;
/* loop through all ethernet devices starting at PF dev */
vfdev = pci_get_class(PCI_CLASS_NETWORK_ETHERNET << 8, NULL);
while (vfdev) {
if (vfdev->is_virtfn && vfdev->physfn == dev)
num_vf++;
vfdev = pci_get_class(PCI_CLASS_NETWORK_ETHERNET << 8, vfdev);
}
#endif
return num_vf;
}
#endif /* RHEL_RELEASE_CODE */
#endif /* < 2.6.34 */
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35) )
#ifdef HAVE_TX_MQ
#if (!(RHEL_RELEASE_CODE && RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6,0)))
#ifndef CONFIG_NETDEVICES_MULTIQUEUE
int _kc_netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
{
unsigned int real_num = dev->real_num_tx_queues;
struct Qdisc *qdisc;
int i;
if (txq < 1 || txq > dev->num_tx_queues)
return -EINVAL;
else if (txq > real_num)
dev->real_num_tx_queues = txq;
else if (txq < real_num) {
dev->real_num_tx_queues = txq;
for (i = txq; i < dev->num_tx_queues; i++) {
qdisc = netdev_get_tx_queue(dev, i)->qdisc;
if (qdisc) {
spin_lock_bh(qdisc_lock(qdisc));
qdisc_reset(qdisc);
spin_unlock_bh(qdisc_lock(qdisc));
}
}
}
return 0;
}
#endif /* CONFIG_NETDEVICES_MULTIQUEUE */
#endif /* !(RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6,0)) */
#endif /* HAVE_TX_MQ */
ssize_t _kc_simple_write_to_buffer(void *to, size_t available, loff_t *ppos,
const void __user *from, size_t count)
{
loff_t pos = *ppos;
size_t res;
if (pos < 0)
return -EINVAL;
if (pos >= available || !count)
return 0;
if (count > available - pos)
count = available - pos;
res = copy_from_user(to + pos, from, count);
if (res == count)
return -EFAULT;
count -= res;
*ppos = pos + count;
return count;
}
#endif /* < 2.6.35 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36) )
static const u32 _kc_flags_dup_features =
(ETH_FLAG_LRO | ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH);
u32 _kc_ethtool_op_get_flags(struct net_device *dev)
{
return dev->features & _kc_flags_dup_features;
}
int _kc_ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
{
if (data & ~supported)
return -EINVAL;
dev->features = ((dev->features & ~_kc_flags_dup_features) |
(data & _kc_flags_dup_features));
return 0;
}
#endif /* < 2.6.36 */
/******************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) )
#if (!(RHEL_RELEASE_CODE && RHEL_RELEASE_CODE > RHEL_RELEASE_VERSION(6,0)))
#ifdef HAVE_NETDEV_SELECT_QUEUE
#include <net/ip.h>
#include <linux/pkt_sched.h>
u16 ___kc_skb_tx_hash(struct net_device *dev, const struct sk_buff *skb,
u16 num_tx_queues)
{
u32 hash;
u16 qoffset = 0;
u16 qcount = num_tx_queues;
if (skb_rx_queue_recorded(skb)) {
hash = skb_get_rx_queue(skb);
while (unlikely(hash >= num_tx_queues))
hash -= num_tx_queues;
return hash;
}
if (skb->sk && skb->sk->sk_hash)
hash = skb->sk->sk_hash;
else
#ifdef NETIF_F_RXHASH
hash = (__force u16) skb->protocol ^ skb->rxhash;
#else
hash = skb->protocol;
#endif
hash = jhash_1word(hash, _kc_hashrnd);
return (u16) (((u64) hash * qcount) >> 32) + qoffset;
}
#endif /* HAVE_NETDEV_SELECT_QUEUE */
u8 _kc_netdev_get_num_tc(struct net_device *dev)
{
return 0;
}
int _kc_netdev_set_num_tc(struct net_device *dev, u8 num_tc)
{
return 0;
}
u8 _kc_netdev_get_prio_tc_map(struct net_device *dev, u8 up)
{
return 0;
}
#endif /* !(RHEL_RELEASE_CODE > RHEL_RELEASE_VERSION(6,0)) */
#endif /* < 2.6.39 */
/******************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0) )
void _kc_skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page,
int off, int size, unsigned int truesize)
{
skb_fill_page_desc(skb, i, page, off, size);
skb->len += size;
skb->data_len += size;
skb->truesize += truesize;
}
#if !(SLE_VERSION_CODE && SLE_VERSION_CODE >= SLE_VERSION(11,3,0))
int _kc_simple_open(struct inode *inode, struct file *file)
{
if (inode->i_private)
file->private_data = inode->i_private;
return 0;
}
#endif /* SLE_VERSION < 11,3,0 */
#endif /* < 3.4.0 */
/******************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0) )
static inline int __kc_pcie_cap_version(struct pci_dev *dev)
{
int pos;
u16 reg16;
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (!pos)
return 0;
pci_read_config_word(dev, pos + PCI_EXP_FLAGS, ®16);
return reg16 & PCI_EXP_FLAGS_VERS;
}
static inline bool __kc_pcie_cap_has_devctl(const struct pci_dev __always_unused *dev)
{
return true;
}
static inline bool __kc_pcie_cap_has_lnkctl(struct pci_dev *dev)
{
int type = pci_pcie_type(dev);
return __kc_pcie_cap_version(dev) > 1 ||
type == PCI_EXP_TYPE_ROOT_PORT ||
type == PCI_EXP_TYPE_ENDPOINT ||
type == PCI_EXP_TYPE_LEG_END;
}
static inline bool __kc_pcie_cap_has_sltctl(struct pci_dev *dev)
{
int type = pci_pcie_type(dev);
int pos;
u16 pcie_flags_reg;
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (!pos)
return false;
pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &pcie_flags_reg);
return __kc_pcie_cap_version(dev) > 1 ||
type == PCI_EXP_TYPE_ROOT_PORT ||
(type == PCI_EXP_TYPE_DOWNSTREAM &&
pcie_flags_reg & PCI_EXP_FLAGS_SLOT);
}
static inline bool __kc_pcie_cap_has_rtctl(struct pci_dev *dev)
{
int type = pci_pcie_type(dev);
return __kc_pcie_cap_version(dev) > 1 ||
type == PCI_EXP_TYPE_ROOT_PORT ||
type == PCI_EXP_TYPE_RC_EC;
}
static bool __kc_pcie_capability_reg_implemented(struct pci_dev *dev, int pos)
{
if (!pci_is_pcie(dev))
return false;
switch (pos) {
case PCI_EXP_FLAGS_TYPE:
return true;
case PCI_EXP_DEVCAP:
case PCI_EXP_DEVCTL:
case PCI_EXP_DEVSTA:
return __kc_pcie_cap_has_devctl(dev);
case PCI_EXP_LNKCAP:
case PCI_EXP_LNKCTL:
case PCI_EXP_LNKSTA:
return __kc_pcie_cap_has_lnkctl(dev);
case PCI_EXP_SLTCAP:
case PCI_EXP_SLTCTL:
case PCI_EXP_SLTSTA:
return __kc_pcie_cap_has_sltctl(dev);
case PCI_EXP_RTCTL:
case PCI_EXP_RTCAP:
case PCI_EXP_RTSTA:
return __kc_pcie_cap_has_rtctl(dev);
case PCI_EXP_DEVCAP2:
case PCI_EXP_DEVCTL2:
case PCI_EXP_LNKCAP2:
case PCI_EXP_LNKCTL2:
case PCI_EXP_LNKSTA2:
return __kc_pcie_cap_version(dev) > 1;
default:
return false;
}
}
/*
* Note that these accessor functions are only for the "PCI Express
* Capability" (see PCIe spec r3.0, sec 7.8). They do not apply to the
* other "PCI Express Extended Capabilities" (AER, VC, ACS, MFVC, etc.)
*/
int __kc_pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val)
{
int ret;
*val = 0;
if (pos & 1)
return -EINVAL;
if (__kc_pcie_capability_reg_implemented(dev, pos)) {
ret = pci_read_config_word(dev, pci_pcie_cap(dev) + pos, val);
/*
* Reset *val to 0 if pci_read_config_word() fails, it may
* have been written as 0xFFFF if hardware error happens
* during pci_read_config_word().
*/
if (ret)
*val = 0;
return ret;
}
/*
* For Functions that do not implement the Slot Capabilities,
* Slot Status, and Slot Control registers, these spaces must
* be hardwired to 0b, with the exception of the Presence Detect
* State bit in the Slot Status register of Downstream Ports,
* which must be hardwired to 1b. (PCIe Base Spec 3.0, sec 7.8)
*/
if (pci_is_pcie(dev) && pos == PCI_EXP_SLTSTA &&
pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM) {
*val = PCI_EXP_SLTSTA_PDS;
}
return 0;
}
int __kc_pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val)
{
int ret;
*val = 0;
if (pos & 3)
return -EINVAL;
if (__kc_pcie_capability_reg_implemented(dev, pos)) {
ret = pci_read_config_dword(dev, pci_pcie_cap(dev) + pos, val);
/*
* Reset *val to 0 if pci_read_config_dword() fails, it may
* have been written as 0xFFFFFFFF if hardware error happens
* during pci_read_config_dword().
*/
if (ret)
*val = 0;
return ret;
}
if (pci_is_pcie(dev) && pos == PCI_EXP_SLTSTA &&
pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM) {
*val = PCI_EXP_SLTSTA_PDS;
}
return 0;
}
int __kc_pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val)
{
if (pos & 1)
return -EINVAL;
if (!__kc_pcie_capability_reg_implemented(dev, pos))
return 0;
return pci_write_config_word(dev, pci_pcie_cap(dev) + pos, val);
}
int __kc_pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
u16 clear, u16 set)
{
int ret;
u16 val;
ret = __kc_pcie_capability_read_word(dev, pos, &val);
if (!ret) {
val &= ~clear;
val |= set;
ret = __kc_pcie_capability_write_word(dev, pos, val);
}
return ret;
}
int __kc_pcie_capability_clear_word(struct pci_dev *dev, int pos,
u16 clear)
{
return __kc_pcie_capability_clear_and_set_word(dev, pos, clear, 0);
}
#endif /* < 3.7.0 */
/******************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0) )
#ifdef CONFIG_XPS
#if NR_CPUS < 64
#define _KC_MAX_XPS_CPUS NR_CPUS
#else
#define _KC_MAX_XPS_CPUS 64
#endif
/*
* netdev_queue sysfs structures and functions.
*/
struct _kc_netdev_queue_attribute {
struct attribute attr;
ssize_t (*show)(struct netdev_queue *queue,
struct _kc_netdev_queue_attribute *attr, char *buf);
ssize_t (*store)(struct netdev_queue *queue,
struct _kc_netdev_queue_attribute *attr, const char *buf, size_t len);
};
#define to_kc_netdev_queue_attr(_attr) container_of(_attr, \
struct _kc_netdev_queue_attribute, attr)
int __kc_netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
u16 index)
{
struct netdev_queue *txq = netdev_get_tx_queue(dev, index);
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) )
/* Redhat requires some odd extended netdev structures */
struct netdev_tx_queue_extended *txq_ext =
netdev_extended(dev)->_tx_ext + index;
struct kobj_type *ktype = txq_ext->kobj.ktype;
#else
struct kobj_type *ktype = txq->kobj.ktype;
#endif
struct _kc_netdev_queue_attribute *xps_attr;
struct attribute *attr = NULL;
int i, len, err;
#define _KC_XPS_BUFLEN (DIV_ROUND_UP(_KC_MAX_XPS_CPUS, 32) * 9)
char buf[_KC_XPS_BUFLEN];
if (!ktype)
return -ENOMEM;
/* attempt to locate the XPS attribute in the Tx queue */
for (i = 0; (attr = ktype->default_attrs[i]); i++) {
if (!strcmp("xps_cpus", attr->name))
break;
}
/* if we did not find it return an error */
if (!attr)
return -EINVAL;
/* copy the mask into a string */
len = bitmap_scnprintf(buf, _KC_XPS_BUFLEN,
cpumask_bits(mask), _KC_MAX_XPS_CPUS);
if (!len)
return -ENOMEM;
xps_attr = to_kc_netdev_queue_attr(attr);
/* Store the XPS value using the SYSFS store call */
err = xps_attr->store(txq, xps_attr, buf, len);
/* we only had an error on err < 0 */
return (err < 0) ? err : 0;
}
#endif /* CONFIG_XPS */
#ifdef HAVE_NETDEV_SELECT_QUEUE
static inline int kc_get_xps_queue(struct net_device *dev, struct sk_buff *skb)
{
#ifdef CONFIG_XPS
struct xps_dev_maps *dev_maps;
struct xps_map *map;
int queue_index = -1;
rcu_read_lock();
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) )
/* Redhat requires some odd extended netdev structures */
dev_maps = rcu_dereference(netdev_extended(dev)->xps_maps);
#else
dev_maps = rcu_dereference(dev->xps_maps);
#endif
if (dev_maps) {
map = rcu_dereference(
dev_maps->cpu_map[raw_smp_processor_id()]);
if (map) {
if (map->len == 1)
queue_index = map->queues[0];
else {
u32 hash;
if (skb->sk && skb->sk->sk_hash)
hash = skb->sk->sk_hash;
else
hash = (__force u16) skb->protocol ^
skb->rxhash;
hash = jhash_1word(hash, _kc_hashrnd);
queue_index = map->queues[
((u64)hash * map->len) >> 32];
}
if (unlikely(queue_index >= dev->real_num_tx_queues))
queue_index = -1;
}
}
rcu_read_unlock();
return queue_index;
#else
return -1;
#endif
}
u16 __kc_netdev_pick_tx(struct net_device *dev, struct sk_buff *skb)
{
struct sock *sk = skb->sk;
int queue_index = sk_tx_queue_get(sk);
int new_index;
if (queue_index >= 0 && queue_index < dev->real_num_tx_queues) {
#ifdef CONFIG_XPS
if (!skb->ooo_okay)
#endif
return queue_index;
}
new_index = kc_get_xps_queue(dev, skb);
if (new_index < 0)
new_index = skb_tx_hash(dev, skb);
if (queue_index != new_index && sk) {
struct dst_entry *dst =
rcu_dereference(sk->sk_dst_cache);
if (dst && skb_dst(skb) == dst)
sk_tx_queue_set(sk, new_index);
}
return new_index;
}
#endif /* HAVE_NETDEV_SELECT_QUEUE */
#endif /* 3.9.0 */
/*****************************************************************************/
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0) )
#ifdef HAVE_FDB_OPS
#ifdef USE_CONST_DEV_UC_CHAR
int __kc_ndo_dflt_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev, const unsigned char *addr,
u16 flags)
#else
int __kc_ndo_dflt_fdb_add(struct ndmsg *ndm, struct net_device *dev,
unsigned char *addr, u16 flags)
#endif
{
int err = -EINVAL;
/* If aging addresses are supported device will need to
* implement its own handler for this.
*/
if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
pr_info("%s: FDB only supports static addresses\n", dev->name);
return err;
}
if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
err = dev_uc_add_excl(dev, addr);
else if (is_multicast_ether_addr(addr))
err = dev_mc_add_excl(dev, addr);
/* Only return duplicate errors if NLM_F_EXCL is set */
if (err == -EEXIST && !(flags & NLM_F_EXCL))
err = 0;
return err;