diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-helpers.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-helpers.h | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-helpers.h b/drivers/net/wireless/iwlwifi/iwl-helpers.h index 8993cca81b40..a443472bea62 100644 --- a/drivers/net/wireless/iwlwifi/iwl-helpers.h +++ b/drivers/net/wireless/iwlwifi/iwl-helpers.h @@ -1,6 +1,6 @@ /****************************************************************************** * - * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved. + * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. @@ -254,6 +254,26 @@ static inline u8 iwl_get_dma_hi_address(dma_addr_t addr) return sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0; } +/** + * iwl_queue_inc_wrap - increment queue index, wrap back to beginning + * @index -- current index + * @n_bd -- total number of entries in queue (must be power of 2) + */ +static inline int iwl_queue_inc_wrap(int index, int n_bd) +{ + return ++index & (n_bd - 1); +} + +/** + * iwl_queue_dec_wrap - decrement queue index, wrap back to end + * @index -- current index + * @n_bd -- total number of entries in queue (must be power of 2) + */ +static inline int iwl_queue_dec_wrap(int index, int n_bd) +{ + return --index & (n_bd - 1); +} + /* TODO: Move fw_desc functions to iwl-pci.ko */ static inline void iwl_free_fw_desc(struct pci_dev *pci_dev, struct fw_desc *desc) |