diff options
| author | Gil Fine <gil.fine@intel.com> | 2021-12-17 04:16:38 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2021-12-22 17:13:14 +0300 |
| commit | a28ec0e165ba2f90568828a2578aaa8540e13bc5 (patch) | |
| tree | 1154cace1b1c8eb49aff7ea6affbc25dd4fd2416 /drivers/thunderbolt/tb.h | |
| parent | 3cc1c6de458e0e58c413c3c35802ca96e55bbdbe (diff) | |
| download | linux-a28ec0e165ba2f90568828a2578aaa8540e13bc5.tar.xz | |
thunderbolt: Add TMU uni-directional mode
Up until Titan Ridge (Thunderbolt 3) device routers only supported
bi-directional mode. In this patch we add to TMU a uni-directional mode.
The uni-directional mode is needed for enabling of low power state of
the link (CLx).
Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 3fae40670b72..b4487354e117 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -89,15 +89,24 @@ enum tb_switch_tmu_rate { * @cap: Offset to the TMU capability (%0 if not found) * @has_ucap: Does the switch support uni-directional mode * @rate: TMU refresh rate related to upstream switch. In case of root - * switch this holds the domain rate. + * switch this holds the domain rate. Reflects the HW setting. * @unidirectional: Is the TMU in uni-directional or bi-directional mode - * related to upstream switch. Don't case for root switch. + * related to upstream switch. Don't care for root switch. + * Reflects the HW setting. + * @unidirectional_request: Is the new TMU mode: uni-directional or bi-directional + * that is requested to be set. Related to upstream switch. + * Don't care for root switch. + * @rate_request: TMU new refresh rate related to upstream switch that is + * requested to be set. In case of root switch, this holds + * the new domain rate that is requested to be set. */ struct tb_switch_tmu { int cap; bool has_ucap; enum tb_switch_tmu_rate rate; bool unidirectional; + bool unidirectional_request; + enum tb_switch_tmu_rate rate_request; }; /** @@ -891,11 +900,22 @@ int tb_switch_tmu_init(struct tb_switch *sw); int tb_switch_tmu_post_time(struct tb_switch *sw); int tb_switch_tmu_disable(struct tb_switch *sw); int tb_switch_tmu_enable(struct tb_switch *sw); - -static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw) +void tb_switch_tmu_configure(struct tb_switch *sw, + enum tb_switch_tmu_rate rate, + bool unidirectional); +/** + * tb_switch_tmu_hifi_is_enabled() - Checks if the specified TMU mode is enabled + * @sw: Router whose TMU mode to check + * @unidirectional: If uni-directional (bi-directional otherwise) + * + * Return true if hardware TMU configuration matches the one passed in + * as parameter. That is HiFi and either uni-directional or bi-directional. + */ +static inline bool tb_switch_tmu_hifi_is_enabled(const struct tb_switch *sw, + bool unidirectional) { return sw->tmu.rate == TB_SWITCH_TMU_RATE_HIFI && - !sw->tmu.unidirectional; + sw->tmu.unidirectional == unidirectional; } int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged); |