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wifi: ieee80211: Add helpers to fetch EMLSR delay and timeout values

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Add helpers to get EMLSR transition delay, padding delay and transition
timeout values from EML capabilities field of Multi-link Element.

Signed-off-by: Rameshkumar Sundaram <quic_ramess@quicinc.com>
Link: https://patch.msgid.link/20250327051320.3253783-4-quic_ramess@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Rameshkumar Sundaram 2025-03-27 10:43:19 +05:30 committed by Johannes Berg
parent 14e0f59a88
commit 91ea0489dc
1 changed files with 74 additions and 0 deletions
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74
include/linux/ieee80211.h
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@ -5618,6 +5618,80 @@ static inline bool ieee80211_tid_to_link_map_size_ok(const u8 *data, size_t len)
return len >= fixed + elem_len;
}
/**
* ieee80211_emlsr_pad_delay_in_us - Fetch the EMLSR Padding delay
* in microseconds
* @eml_cap: EML capabilities field value from common info field of
* the Multi-link element
* Return: the EMLSR Padding delay (in microseconds) encoded in the
* EML Capabilities field
*/
static inline u32 ieee80211_emlsr_pad_delay_in_us(u16 eml_cap)
{
/* IEEE Std 802.11be-2024 Table 9-417i—Encoding of the EMLSR
* Padding Delay subfield.
*/
u32 pad_delay = u16_get_bits(eml_cap,
IEEE80211_EML_CAP_EMLSR_PADDING_DELAY);
if (!pad_delay ||
pad_delay > IEEE80211_EML_CAP_EMLSR_PADDING_DELAY_256US)
return 0;
return 32 * (1 << (pad_delay - 1));
}
/**
* ieee80211_emlsr_trans_delay_in_us - Fetch the EMLSR Transition
* delay in microseconds
* @eml_cap: EML capabilities field value from common info field of
* the Multi-link element
* Return: the EMLSR Transition delay (in microseconds) encoded in the
* EML Capabilities field
*/
static inline u32 ieee80211_emlsr_trans_delay_in_us(u16 eml_cap)
{
/* IEEE Std 802.11be-2024 Table 9-417j—Encoding of the EMLSR
* Transition Delay subfield.
*/
u32 trans_delay =
u16_get_bits(eml_cap,
IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY);
/* invalid values also just use 0 */
if (!trans_delay ||
trans_delay > IEEE80211_EML_CAP_EMLSR_TRANSITION_DELAY_256US)
return 0;
return 16 * (1 << (trans_delay - 1));
}
/**
* ieee80211_eml_trans_timeout_in_us - Fetch the EMLSR Transition
* timeout value in microseconds
* @eml_cap: EML capabilities field value from common info field of
* the Multi-link element
* Return: the EMLSR Transition timeout (in microseconds) encoded in
* the EML Capabilities field
*/
static inline u32 ieee80211_eml_trans_timeout_in_us(u16 eml_cap)
{
/* IEEE Std 802.11be-2024 Table 9-417m—Encoding of the
* Transition Timeout subfield.
*/
u8 timeout = u16_get_bits(eml_cap,
IEEE80211_EML_CAP_TRANSITION_TIMEOUT);
/* invalid values also just use 0 */
if (!timeout || timeout > IEEE80211_EML_CAP_TRANSITION_TIMEOUT_128TU)
return 0;
return 128 * (1 << (timeout - 1));
}
#define for_each_mle_subelement(_elem, _data, _len) \
if (ieee80211_mle_size_ok(_data, _len)) \
for_each_element(_elem, \