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iwlwifi: add RATE_MCS_RATE_MSK

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Throughout the code we use rate_n_flags & 0xff to extract the lower byte
of the rate_n_flags u32 that contains the information about the rate.
Add a #define and remove the use of the magic number.

Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
This commit is contained in:
Daniel Halperin
2011-03-18 18:48:55 -07:00
committed by Wey-Yi Guy
parent d0eb633431
commit 2520546aec
3 changed files with 11 additions and 8 deletions
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15
drivers/net/wireless/iwlwifi/iwl-agn-rs.c
View File

@@ -115,13 +115,18 @@ const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
/* FIXME:RS: ^^ should be INV (legacy) */
};
static inline u8 rs_extract_rate(u32 rate_n_flags)
{
return (u8)(rate_n_flags & RATE_MCS_RATE_MSK);
}
static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
{
int idx = 0;
/* HT rate format */
if (rate_n_flags & RATE_MCS_HT_MSK) {
idx = (rate_n_flags & 0xff);
idx = rs_extract_rate(rate_n_flags);
if (idx >= IWL_RATE_MIMO3_6M_PLCP)
idx = idx - IWL_RATE_MIMO3_6M_PLCP;
@@ -138,7 +143,8 @@ static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
/* legacy rate format, search for match in table */
} else {
for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
if (iwl_rates[idx].plcp ==
rs_extract_rate(rate_n_flags))
return idx;
}
@@ -239,11 +245,6 @@ static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
#define MCS_INDEX_PER_STREAM (8)
static inline u8 rs_extract_rate(u32 rate_n_flags)
{
return (u8)(rate_n_flags & 0xFF);
}
static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
{
window->data = 0;

2
drivers/net/wireless/iwlwifi/iwl-agn.h
View File

@@ -310,7 +310,7 @@ static inline u32 iwl_ant_idx_to_flags(u8 ant_idx)
static inline u8 iwl_hw_get_rate(__le32 rate_n_flags)
{
return le32_to_cpu(rate_n_flags) & 0xFF;
return le32_to_cpu(rate_n_flags) & RATE_MCS_RATE_MSK;
}
static inline __le32 iwl_hw_set_rate_n_flags(u8 rate, u32 flags)

2
drivers/net/wireless/iwlwifi/iwl-commands.h
View File

@@ -324,6 +324,8 @@ struct iwl3945_power_per_rate {
#define RATE_MCS_SPATIAL_MSK 0x18
#define RATE_MCS_HT_DUP_POS 5
#define RATE_MCS_HT_DUP_MSK 0x20
/* Both legacy and HT use bits 7:0 as the CCK/OFDM rate or HT MCS */
#define RATE_MCS_RATE_MSK 0xff
/* Bit 8: (1) HT format, (0) legacy format in bits 7:0 */
#define RATE_MCS_FLAGS_POS 8