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| author | Eliad Peller <eliad@wizery.com> | 2013-11-21 12:28:17 +0200 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2014-02-03 22:23:38 +0200 |
| commit | 440c411d6ae9771c62e2b44ee94a80168f86077f (patch) | |
| tree | 529d73a9dfb7e26caf81340f73a8a8c90a97bc72 /drivers/net | |
| parent | 8e0dc2068b902308ff2059c455c8efe1912ccd0f (diff) | |
| download | talos-obmc-linux-440c411d6ae9771c62e2b44ee94a80168f86077f.tar.gz talos-obmc-linux-440c411d6ae9771c62e2b44ee94a80168f86077f.zip | |
iwlwifi: add D0i3 references boiler plate
D0i3 is bus power saving feature. It involves the
firmware - the driver needs to send a list of commands
to the firmware before entering this state. Wake up from
d0i3 also requires a few commands to the firmware.
The trigger to enter D0i3 is an idle timeout that will be
implemented later and will most probably rely on RUNTIME_PM
infrastructure.
In order to prevent entrance to D0i3 in critical flows, we
implement here a reference infrastructure. When a ref is
taken, we can't enter D0i3.
PCIe does't support D0i3.
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-config.h | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-trans.h | 19 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-config.h b/drivers/net/wireless/iwlwifi/iwl-config.h index 456fccaf1cbb..2ce89d837194 100644 --- a/drivers/net/wireless/iwlwifi/iwl-config.h +++ b/drivers/net/wireless/iwlwifi/iwl-config.h @@ -227,6 +227,7 @@ struct iwl_pwr_tx_backoff { * @high_temp: Is this NIC is designated to be in high temperature. * @host_interrupt_operation_mode: device needs host interrupt operation * mode set + * @d0i3: device uses d0i3 instead of d3 * @nvm_hw_section_num: the ID of the HW NVM section * @pwr_tx_backoffs: translation table between power limits and backoffs * @@ -259,6 +260,7 @@ struct iwl_cfg { const bool internal_wimax_coex; const bool host_interrupt_operation_mode; bool high_temp; + bool d0i3; u8 nvm_hw_section_num; const struct iwl_pwr_tx_backoff *pwr_tx_backoffs; }; diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h index a350abe50b7e..1b2ac31d7445 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/iwlwifi/iwl-trans.h @@ -443,6 +443,11 @@ struct iwl_trans; * @release_nic_access: let the NIC go to sleep. The "flags" parameter * must be the same one that was sent before to the grab_nic_access. * @set_bits_mask - set SRAM register according to value and mask. + * @ref: grab a reference to the transport/FW layers, disallowing + * certain low power states + * @unref: release a reference previously taken with @ref. Note that + * initially the reference count is 1, making an initial @unref + * necessary to allow low power states. */ struct iwl_trans_ops { @@ -489,6 +494,8 @@ struct iwl_trans_ops { unsigned long *flags); void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask, u32 value); + void (*ref)(struct iwl_trans *trans); + void (*unref)(struct iwl_trans *trans); }; /** @@ -630,6 +637,18 @@ static inline int iwl_trans_d3_resume(struct iwl_trans *trans, return trans->ops->d3_resume(trans, status, test); } +static inline void iwl_trans_ref(struct iwl_trans *trans) +{ + if (trans->ops->ref) + trans->ops->ref(trans); +} + +static inline void iwl_trans_unref(struct iwl_trans *trans) +{ + if (trans->ops->unref) + trans->ops->unref(trans); +} + static inline int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) { |
