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iwlwifi: document transmit buffer bits better 

Properly document the transmit buffer bits using an enum and
kernel-doc documentation.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2017-05-04 11:01:32 +02:00 committed by Luca Coelho
parent e6138c9ca5
commit d98d6fb9f1
1 changed files with 14 additions and 4 deletions
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18
drivers/net/wireless/intel/iwlwifi/iwl-fh.h
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@ -6,7 +6,7 @@
* GPL LICENSE SUMMARY
*
* Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
* Copyright(c) 2015 - 2017 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
@ -32,7 +32,7 @@
* BSD LICENSE
*
* Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
* Copyright(c) 2015 - 2017 Intel Deutschland GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -655,6 +655,17 @@ static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr)
{
return (sizeof(addr) > sizeof(u32) ? upper_32_bits(addr) : 0) & 0xF;
}
/**
* enum iwl_tfd_tb_hi_n_len - TB hi_n_len bits
* @TB_HI_N_LEN_ADDR_HI_MSK: high 4 bits (to make it 36) of DMA address
* @TB_HI_N_LEN_LEN_MSK: length of the TB
*/
enum iwl_tfd_tb_hi_n_len {
TB_HI_N_LEN_ADDR_HI_MSK = 0xf,
TB_HI_N_LEN_LEN_MSK = 0xfff0,
};
/**
* struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor
*
@ -662,8 +673,7 @@ static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr)
*
* @lo: low [31:0] portion of the dma address of TX buffer
* every even is unaligned on 16 bit boundary
* @hi_n_len 0-3 [35:32] portion of dma
* 4-15 length of the tx buffer
* @hi_n_len: &enum iwl_tfd_tb_hi_n_len
*/
struct iwl_tfd_tb {
__le32 lo;