diff options
| author | Kan Liang <kan.liang@intel.com> | 2016-02-19 09:24:02 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-19 22:54:09 -0500 |
| commit | 421797b1aa363cb897f29f7d365e068dc9d9db81 (patch) | |
| tree | 50c3851083719e586bb6c83a58f57261dab1163b /net | |
| parent | ac2c7ad0e5d6030452c9af2fafd192e17fd04264 (diff) | |
| download | linux-421797b1aa363cb897f29f7d365e068dc9d9db81.tar.bz2 | |
net/ethtool: support get coalesce per queue
This patch implements sub command ETHTOOL_GCOALESCE for ioctl
ETHTOOL_PERQUEUE. It introduces an interface get_per_queue_coalesce to
get coalesce of each masked queue from device driver. Then the interrupt
coalescing parameters will be copied back to user space one by one.
Signed-off-by: Kan Liang <kan.liang@intel.com>
Reviewed-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/ethtool.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c index d640ecf71e74..2a6c3a26f63f 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1888,6 +1888,38 @@ out: return ret; } +static int ethtool_get_per_queue_coalesce(struct net_device *dev, + void __user *useraddr, + struct ethtool_per_queue_op *per_queue_opt) +{ + u32 bit; + int ret; + DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); + + if (!dev->ethtool_ops->get_per_queue_coalesce) + return -EOPNOTSUPP; + + useraddr += sizeof(*per_queue_opt); + + bitmap_from_u32array(queue_mask, + MAX_NUM_QUEUE, + per_queue_opt->queue_mask, + DIV_ROUND_UP(MAX_NUM_QUEUE, 32)); + + for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { + struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; + + ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); + if (ret != 0) + return ret; + if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) + return -EFAULT; + useraddr += sizeof(coalesce); + } + + return 0; +} + static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr) { struct ethtool_per_queue_op per_queue_opt; @@ -1896,7 +1928,8 @@ static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr) return -EFAULT; switch (per_queue_opt.sub_command) { - + case ETHTOOL_GCOALESCE: + return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); default: return -EOPNOTSUPP; }; |