forked from Minki/linux
ethtool: Support for configurable RSS hash key
This ethtool patch primarily copies the ioctl command data structures from/to the User space and invokes the driver hook. Signed-off-by: Venkat Duvvuru <VenkatKumar.Duvvuru@Emulex.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Venkata Duvvuru
David S. Miller
parent
862aa49164
commit
3de0b59239
@ -154,13 +154,23 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
|
||||
* @reset: Reset (part of) the device, as specified by a bitmask of
|
||||
* flags from &enum ethtool_reset_flags. Returns a negative
|
||||
* error code or zero.
|
||||
* @get_rxfh_key_size: Get the size of the RX flow hash key.
|
||||
* Returns zero if not supported for this specific device.
|
||||
* @get_rxfh_indir_size: Get the size of the RX flow hash indirection table.
|
||||
* Returns zero if not supported for this specific device.
|
||||
* @get_rxfh_indir: Get the contents of the RX flow hash indirection table.
|
||||
* Will not be called if @get_rxfh_indir_size returns zero.
|
||||
* @get_rxfh: Get the contents of the RX flow hash indirection table and hash
|
||||
* key.
|
||||
* Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size
|
||||
* returns zero.
|
||||
* Returns a negative error code or zero.
|
||||
* @set_rxfh_indir: Set the contents of the RX flow hash indirection table.
|
||||
* Will not be called if @get_rxfh_indir_size returns zero.
|
||||
* @set_rxfh: Set the contents of the RX flow hash indirection table and
|
||||
* hash key.
|
||||
* Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size
|
||||
* returns zero.
|
||||
* Returns a negative error code or zero.
|
||||
* @get_channels: Get number of channels.
|
||||
* @set_channels: Set number of channels. Returns a negative error code or
|
||||
@ -232,7 +242,10 @@ struct ethtool_ops {
|
||||
int (*set_rxnfc)(struct net_device *, struct ethtool_rxnfc *);
|
||||
int (*flash_device)(struct net_device *, struct ethtool_flash *);
|
||||
int (*reset)(struct net_device *, u32 *);
|
||||
u32 (*get_rxfh_key_size)(struct net_device *);
|
||||
u32 (*get_rxfh_indir_size)(struct net_device *);
|
||||
int (*get_rxfh)(struct net_device *, u32 *, u8 *);
|
||||
int (*set_rxfh)(struct net_device *, u32 *, u8 *);
|
||||
int (*get_rxfh_indir)(struct net_device *, u32 *);
|
||||
int (*set_rxfh_indir)(struct net_device *, const u32 *);
|
||||
void (*get_channels)(struct net_device *, struct ethtool_channels *);
|
||||
|
||||
@ -846,6 +846,35 @@ struct ethtool_rxfh_indir {
|
||||
__u32 ring_index[0];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ethtool_rxfh - command to get/set RX flow hash indir or/and hash key.
|
||||
* @cmd: Specific command number - %ETHTOOL_GRSSH or %ETHTOOL_SRSSH
|
||||
* @rss_context: RSS context identifier.
|
||||
* @indir_size: On entry, the array size of the user buffer, which may be zero.
|
||||
* On return from %ETHTOOL_GRSSH, the array size of the hardware
|
||||
* indirection table.
|
||||
* @key_size: On entry, the array size of the user buffer in bytes,
|
||||
* which may be zero.
|
||||
* On return from %ETHTOOL_GRSSH, the size of the RSS hash key.
|
||||
* @rsvd: Reserved for future extensions.
|
||||
* @rss_config: RX ring/queue index for each hash value i.e., indirection table
|
||||
* of size @indir_size followed by hash key of size @key_size.
|
||||
*
|
||||
* For %ETHTOOL_GRSSH, a @indir_size and key_size of zero means that only the
|
||||
* size should be returned. For %ETHTOOL_SRSSH, a @indir_size of 0xDEADBEEF
|
||||
* means that indir table setting is not requested and a @indir_size of zero
|
||||
* means the indir table should be reset to default values. This last feature
|
||||
* is not supported by the original implementations.
|
||||
*/
|
||||
struct ethtool_rxfh {
|
||||
__u32 cmd;
|
||||
__u32 rss_context;
|
||||
__u32 indir_size;
|
||||
__u32 key_size;
|
||||
__u32 rsvd[2];
|
||||
__u32 rss_config[0];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ethtool_rx_ntuple_flow_spec - specification for RX flow filter
|
||||
* @flow_type: Type of match to perform, e.g. %TCP_V4_FLOW
|
||||
@ -1118,6 +1147,9 @@ enum ethtool_sfeatures_retval_bits {
|
||||
#define ETHTOOL_GEEE 0x00000044 /* Get EEE settings */
|
||||
#define ETHTOOL_SEEE 0x00000045 /* Set EEE settings */
|
||||
|
||||
#define ETHTOOL_GRSSH 0x00000046 /* Get RX flow hash configuration */
|
||||
#define ETHTOOL_SRSSH 0x00000047 /* Set RX flow hash configuration */
|
||||
|
||||
/* compatibility with older code */
|
||||
#define SPARC_ETH_GSET ETHTOOL_GSET
|
||||
#define SPARC_ETH_SSET ETHTOOL_SSET
|
||||
|
||||
@ -557,6 +557,23 @@ err_out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
|
||||
struct ethtool_rxnfc *rx_rings,
|
||||
u32 size)
|
||||
{
|
||||
int ret = 0, i;
|
||||
|
||||
if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
|
||||
ret = -EFAULT;
|
||||
|
||||
/* Validate ring indices */
|
||||
for (i = 0; i < size; i++) {
|
||||
if (indir[i] >= rx_rings->data)
|
||||
ret = -EINVAL;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
|
||||
void __user *useraddr)
|
||||
{
|
||||
@ -613,6 +630,7 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
|
||||
u32 *indir;
|
||||
const struct ethtool_ops *ops = dev->ethtool_ops;
|
||||
int ret;
|
||||
u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
|
||||
|
||||
if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
|
||||
!ops->get_rxnfc)
|
||||
@ -643,22 +661,12 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
|
||||
for (i = 0; i < dev_size; i++)
|
||||
indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
|
||||
} else {
|
||||
if (copy_from_user(indir,
|
||||
useraddr +
|
||||
offsetof(struct ethtool_rxfh_indir,
|
||||
ring_index[0]),
|
||||
dev_size * sizeof(indir[0]))) {
|
||||
ret = -EFAULT;
|
||||
ret = ethtool_copy_validate_indir(indir,
|
||||
useraddr + ringidx_offset,
|
||||
&rx_rings,
|
||||
dev_size);
|
||||
if (ret)
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Validate ring indices */
|
||||
for (i = 0; i < dev_size; i++) {
|
||||
if (indir[i] >= rx_rings.data) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ret = ops->set_rxfh_indir(dev, indir);
|
||||
@ -668,6 +676,184 @@ out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
|
||||
void __user *useraddr)
|
||||
{
|
||||
int ret;
|
||||
const struct ethtool_ops *ops = dev->ethtool_ops;
|
||||
u32 user_indir_size = 0, user_key_size = 0;
|
||||
u32 dev_indir_size = 0, dev_key_size = 0;
|
||||
u32 total_size;
|
||||
u32 indir_offset, indir_bytes;
|
||||
u32 key_offset;
|
||||
u32 *indir = NULL;
|
||||
u8 *hkey = NULL;
|
||||
u8 *rss_config;
|
||||
|
||||
if (!(dev->ethtool_ops->get_rxfh_indir_size ||
|
||||
dev->ethtool_ops->get_rxfh_key_size) ||
|
||||
!dev->ethtool_ops->get_rxfh)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
if (ops->get_rxfh_indir_size)
|
||||
dev_indir_size = ops->get_rxfh_indir_size(dev);
|
||||
|
||||
indir_offset = offsetof(struct ethtool_rxfh, indir_size);
|
||||
|
||||
if (copy_from_user(&user_indir_size,
|
||||
useraddr + indir_offset,
|
||||
sizeof(user_indir_size)))
|
||||
return -EFAULT;
|
||||
|
||||
if (copy_to_user(useraddr + indir_offset,
|
||||
&dev_indir_size, sizeof(dev_indir_size)))
|
||||
return -EFAULT;
|
||||
|
||||
if (ops->get_rxfh_key_size)
|
||||
dev_key_size = ops->get_rxfh_key_size(dev);
|
||||
|
||||
if ((dev_key_size + dev_indir_size) == 0)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
key_offset = offsetof(struct ethtool_rxfh, key_size);
|
||||
|
||||
if (copy_from_user(&user_key_size,
|
||||
useraddr + key_offset,
|
||||
sizeof(user_key_size)))
|
||||
return -EFAULT;
|
||||
|
||||
if (copy_to_user(useraddr + key_offset,
|
||||
&dev_key_size, sizeof(dev_key_size)))
|
||||
return -EFAULT;
|
||||
|
||||
/* If the user buffer size is 0, this is just a query for the
|
||||
* device table size and key size. Otherwise, if the User size is
|
||||
* not equal to device table size or key size it's an error.
|
||||
*/
|
||||
if (!user_indir_size && !user_key_size)
|
||||
return 0;
|
||||
|
||||
if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
|
||||
(user_key_size && (user_key_size != dev_key_size)))
|
||||
return -EINVAL;
|
||||
|
||||
indir_bytes = user_indir_size * sizeof(indir[0]);
|
||||
total_size = indir_bytes + user_key_size;
|
||||
rss_config = kzalloc(total_size, GFP_USER);
|
||||
if (!rss_config)
|
||||
return -ENOMEM;
|
||||
|
||||
if (user_indir_size)
|
||||
indir = (u32 *)rss_config;
|
||||
|
||||
if (user_key_size)
|
||||
hkey = rss_config + indir_bytes;
|
||||
|
||||
ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey);
|
||||
if (!ret) {
|
||||
if (copy_to_user(useraddr +
|
||||
offsetof(struct ethtool_rxfh, rss_config[0]),
|
||||
rss_config, total_size))
|
||||
ret = -EFAULT;
|
||||
}
|
||||
|
||||
kfree(rss_config);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
|
||||
void __user *useraddr)
|
||||
{
|
||||
int ret;
|
||||
const struct ethtool_ops *ops = dev->ethtool_ops;
|
||||
struct ethtool_rxnfc rx_rings;
|
||||
u32 user_indir_size = 0, dev_indir_size = 0, i;
|
||||
u32 user_key_size = 0, dev_key_size = 0;
|
||||
u32 *indir = NULL, indir_bytes = 0;
|
||||
u8 *hkey = NULL;
|
||||
u8 *rss_config;
|
||||
u32 indir_offset, key_offset;
|
||||
u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
|
||||
|
||||
if (!(ops->get_rxfh_indir_size || ops->get_rxfh_key_size) ||
|
||||
!ops->get_rxnfc || !ops->set_rxfh)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
if (ops->get_rxfh_indir_size)
|
||||
dev_indir_size = ops->get_rxfh_indir_size(dev);
|
||||
|
||||
indir_offset = offsetof(struct ethtool_rxfh, indir_size);
|
||||
if (copy_from_user(&user_indir_size,
|
||||
useraddr + indir_offset,
|
||||
sizeof(user_indir_size)))
|
||||
return -EFAULT;
|
||||
|
||||
if (ops->get_rxfh_key_size)
|
||||
dev_key_size = dev->ethtool_ops->get_rxfh_key_size(dev);
|
||||
|
||||
if ((dev_key_size + dev_indir_size) == 0)
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
key_offset = offsetof(struct ethtool_rxfh, key_size);
|
||||
if (copy_from_user(&user_key_size,
|
||||
useraddr + key_offset,
|
||||
sizeof(user_key_size)))
|
||||
return -EFAULT;
|
||||
|
||||
/* If either indir or hash key is valid, proceed further.
|
||||
*/
|
||||
if ((user_indir_size && ((user_indir_size != 0xDEADBEEF) &&
|
||||
user_indir_size != dev_indir_size)) ||
|
||||
(user_key_size && (user_key_size != dev_key_size)))
|
||||
return -EINVAL;
|
||||
|
||||
if (user_indir_size != 0xDEADBEEF)
|
||||
indir_bytes = dev_indir_size * sizeof(indir[0]);
|
||||
|
||||
rss_config = kzalloc(indir_bytes + user_key_size, GFP_USER);
|
||||
if (!rss_config)
|
||||
return -ENOMEM;
|
||||
|
||||
rx_rings.cmd = ETHTOOL_GRXRINGS;
|
||||
ret = ops->get_rxnfc(dev, &rx_rings, NULL);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
/* user_indir_size == 0 means reset the indir table to default.
|
||||
* user_indir_size == 0xDEADBEEF means indir setting is not requested.
|
||||
*/
|
||||
if (user_indir_size && user_indir_size != 0xDEADBEEF) {
|
||||
indir = (u32 *)rss_config;
|
||||
ret = ethtool_copy_validate_indir(indir,
|
||||
useraddr + rss_cfg_offset,
|
||||
&rx_rings,
|
||||
user_indir_size);
|
||||
if (ret)
|
||||
goto out;
|
||||
} else if (user_indir_size == 0) {
|
||||
indir = (u32 *)rss_config;
|
||||
for (i = 0; i < dev_indir_size; i++)
|
||||
indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
|
||||
}
|
||||
|
||||
if (user_key_size) {
|
||||
hkey = rss_config + indir_bytes;
|
||||
if (copy_from_user(hkey,
|
||||
useraddr + rss_cfg_offset + indir_bytes,
|
||||
user_key_size)) {
|
||||
ret = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
ret = ops->set_rxfh(dev, indir, hkey);
|
||||
|
||||
out:
|
||||
kfree(rss_config);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
|
||||
{
|
||||
struct ethtool_regs regs;
|
||||
@ -1491,6 +1677,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
|
||||
case ETHTOOL_GRXCLSRULE:
|
||||
case ETHTOOL_GRXCLSRLALL:
|
||||
case ETHTOOL_GRXFHINDIR:
|
||||
case ETHTOOL_GRSSH:
|
||||
case ETHTOOL_GFEATURES:
|
||||
case ETHTOOL_GCHANNELS:
|
||||
case ETHTOOL_GET_TS_INFO:
|
||||
@ -1628,6 +1815,12 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
|
||||
case ETHTOOL_SRXFHINDIR:
|
||||
rc = ethtool_set_rxfh_indir(dev, useraddr);
|
||||
break;
|
||||
case ETHTOOL_GRSSH:
|
||||
rc = ethtool_get_rxfh(dev, useraddr);
|
||||
break;
|
||||
case ETHTOOL_SRSSH:
|
||||
rc = ethtool_set_rxfh(dev, useraddr);
|
||||
break;
|
||||
case ETHTOOL_GFEATURES:
|
||||
rc = ethtool_get_features(dev, useraddr);
|
||||
break;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user