diff options
| author |   Kiran Patil <kiran.patil@intel.com> | 2015-09-24 15:43:02 -0400 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-09-28 17:38:27 -0700 |
| commit | 1e6d6f8c1b07a5874444c3a403eb24427e8b39d3 (patch) | |
| tree | 081255a434a2293bc48faf7cba3d8e5ad646c3cd /drivers/net/ethernet/intel/i40e/i40e_txrx.h | |
| parent | bridge: Allow forward delay to be cfgd when STP enabled (diff) | |
| download | linux-dev-1e6d6f8c1b07a5874444c3a403eb24427e8b39d3.tar.xz linux-dev-1e6d6f8c1b07a5874444c3a403eb24427e8b39d3.zip | |
i40e: Move i40e_get_head into header file
i40e_get_head needs to be called in multiple files in a further patch,
prepare by moving the function into a header file.
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index f1385a1989fa..51487ef9eda3 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -326,4 +326,18 @@ int i40e_xmit_descriptor_count(struct sk_buff *skb, struct i40e_ring *tx_ring); int i40e_tx_prepare_vlan_flags(struct sk_buff *skb, struct i40e_ring *tx_ring, u32 *flags); #endif + +/** + * i40e_get_head - Retrieve head from head writeback + * @tx_ring: tx ring to fetch head of + * + * Returns value of Tx ring head based on value stored + * in head write-back location + **/ +static inline u32 i40e_get_head(struct i40e_ring *tx_ring) +{ + void *head = (struct i40e_tx_desc *)tx_ring->desc + tx_ring->count; + + return le32_to_cpu(*(volatile __le32 *)head); +} #endif /* _I40E_TXRX_H_ */ |