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mac802154: Prepare forcing specific symbol duration 

The scan logic will bypass the whole ->set_channel() logic from the top
by calling the driver hook to just switch between channels when
required.

We can no longer rely on the "current" page/channel settings to set the
right symbol duration. Let's add these as new parameters to allow
providing the page/channel couple that we want.

There is no functional change.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230103165644.432209-5-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
This commit is contained in:
Miquel Raynal 2023-01-03 17:56:42 +01:00 committed by Stefan Schmidt
parent d2aaf2a017
commit 5755cd4d94
3 changed files with 14 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/cfg802154.h
View File

@ -483,6 +483,7 @@ static inline const char *wpan_phy_name(struct wpan_phy *phy)
return dev_name(&phy->dev);
}
void ieee802154_configure_durations(struct wpan_phy *phy);
void ieee802154_configure_durations(struct wpan_phy *phy,
unsigned int page, unsigned int channel);
#endif /* __NET_CFG802154_H */

2
net/mac802154/cfg.c
View File

@ -118,7 +118,7 @@ ieee802154_set_channel(struct wpan_phy *wpan_phy, u8 page, u8 channel)
if (!ret) {
wpan_phy->current_page = page;
wpan_phy->current_channel = channel;
ieee802154_configure_durations(wpan_phy);
ieee802154_configure_durations(wpan_phy, page, channel);
}
return ret;

20
net/mac802154/main.c
View File

@ -113,32 +113,33 @@ ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
}
EXPORT_SYMBOL(ieee802154_alloc_hw);
void ieee802154_configure_durations(struct wpan_phy *phy)
void ieee802154_configure_durations(struct wpan_phy *phy,
unsigned int page, unsigned int channel)
{
u32 duration = 0;
switch (phy->current_page) {
switch (page) {
case 0:
if (BIT(phy->current_channel) & 0x1)
if (BIT(channel) & 0x1)
/* 868 MHz BPSK 802.15.4-2003: 20 ksym/s */
duration = 50 * NSEC_PER_USEC;
else if (BIT(phy->current_channel) & 0x7FE)
else if (BIT(channel) & 0x7FE)
/* 915 MHz BPSK 802.15.4-2003: 40 ksym/s */
duration = 25 * NSEC_PER_USEC;
else if (BIT(phy->current_channel) & 0x7FFF800)
else if (BIT(channel) & 0x7FFF800)
/* 2400 MHz O-QPSK 802.15.4-2006: 62.5 ksym/s */
duration = 16 * NSEC_PER_USEC;
break;
case 2:
if (BIT(phy->current_channel) & 0x1)
if (BIT(channel) & 0x1)
/* 868 MHz O-QPSK 802.15.4-2006: 25 ksym/s */
duration = 40 * NSEC_PER_USEC;
else if (BIT(phy->current_channel) & 0x7FE)
else if (BIT(channel) & 0x7FE)
/* 915 MHz O-QPSK 802.15.4-2006: 62.5 ksym/s */
duration = 16 * NSEC_PER_USEC;
break;
case 3:
if (BIT(phy->current_channel) & 0x3FFF)
if (BIT(channel) & 0x3FFF)
/* 2.4 GHz CSS 802.15.4a-2007: 1/6 Msym/s */
duration = 6 * NSEC_PER_USEC;
break;
@ -201,7 +202,8 @@ int ieee802154_register_hw(struct ieee802154_hw *hw)
ieee802154_setup_wpan_phy_pib(local->phy);
ieee802154_configure_durations(local->phy);
ieee802154_configure_durations(local->phy, local->phy->current_page,
local->phy->current_channel);
if (!(hw->flags & IEEE802154_HW_CSMA_PARAMS)) {
local->phy->supported.min_csma_backoffs = 4;