wifi: iwlwifi: pcie: move pm_support to the specific transport

Currently it is under iwl_trans, which is the bus agnostic part of the
transport. But really it is relevant for pcie only, so move it to the
iwl_trans_pcie and export it via an API to the opmode.

Reviewed-by: Emmanuel Grumbach <[email protected]>
Signed-off-by: Miri Korenblit <[email protected]>
Link: https://patch.msgid.link/20250909061931.997193cabd04.Ic6648f040430c94150d0fa11601f50a6a630b862@changeid

Author: Miriam-Rachel

drivers/net/wireless/intel/iwlwifi/dvm/power.c

@@ -368,7 +368,7 @@ int iwl_power_update_mode(struct iwl_priv *priv, bool force)
 /* initialize to default */
 void iwl_power_initialize(struct iwl_priv *priv)
 {
-	priv->power_data.bus_pm = priv->trans->pm_support;
+	priv->power_data.bus_pm = iwl_trans_is_pm_supported(priv->trans);
 
 	priv->power_data.debug_sleep_level_override = -1;
 

drivers/net/wireless/intel/iwlwifi/iwl-trans.c

@@ -807,3 +807,12 @@ void iwl_trans_set_reduce_power(struct iwl_trans *trans,
 {
 	iwl_trans_pcie_ctx_info_v2_set_reduce_power(trans, capa);
 }
+
+bool iwl_trans_is_pm_supported(struct iwl_trans *trans)
+{
+	if (WARN_ON(trans->mac_cfg->gen2))
+		return false;
+
+	return iwl_pcie_gen1_is_pm_supported(trans);
+}
+IWL_EXPORT_SYMBOL(iwl_trans_is_pm_supported);

drivers/net/wireless/intel/iwlwifi/iwl-trans.h

@@ -844,7 +844,6 @@ struct iwl_trans_info {
  * @dev: pointer to struct device * that represents the device
  * @info: device information for use by other layers
  * @pnvm_loaded: indicates PNVM was loaded
- * @pm_support: set to true in start_hw if link pm is supported
  * @ltr_enabled: set to true if the LTR is enabled
  * @suppress_cmd_error_once: suppress "FW error in SYNC CMD" once,
  *	e.g. for testing
@@ -884,7 +883,6 @@ struct iwl_trans {
 	bool step_urm;
 	bool suppress_cmd_error_once;
 
-	bool pm_support;
 	bool ltr_enabled;
 	u8 pnvm_loaded:1;
 	u8 fail_to_parse_pnvm_image:1;
@@ -1262,4 +1260,6 @@ static inline u16 iwl_trans_get_device_id(struct iwl_trans *trans)
 	return u32_get_bits(trans->info.hw_id, GENMASK(31, 16));
 }
 
+bool iwl_trans_is_pm_supported(struct iwl_trans *trans);
+
 #endif /* __iwl_trans_h__ */

drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/internal.h

@@ -403,6 +403,7 @@ struct iwl_pcie_txqs {
  * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
  *	The user should use iwl_trans_{alloc,free}_tx_cmd.
  * @dev_cmd_pool_name: name for the TX command allocation pool
+ * @pm_support: set to true in start_hw if link pm is supported
  */
 struct iwl_trans_pcie {
 	struct iwl_rxq *rxq;
@@ -512,6 +513,8 @@ struct iwl_trans_pcie {
 
 	struct kmem_cache *dev_cmd_pool;
 	char dev_cmd_pool_name[50];
+
+	bool pm_support;
 };
 
 static inline struct iwl_trans_pcie *
@@ -1151,4 +1154,11 @@ int iwl_trans_pcie_copy_imr(struct iwl_trans *trans,
 int iwl_trans_pcie_rxq_dma_data(struct iwl_trans *trans, int queue,
 				struct iwl_trans_rxq_dma_data *data);
 
+static inline bool iwl_pcie_gen1_is_pm_supported(struct iwl_trans *trans)
+{
+	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+
+	return trans_pcie->pm_support;
+}
+
 #endif /* __iwl_trans_int_pcie_h__ */

drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/trans.c

@@ -214,7 +214,7 @@ void iwl_pcie_apm_config(struct iwl_trans *trans)
 	iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_DISABLED);
 
 	pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
-	trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
+	trans_pcie->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
 
 	pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap);
 	trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN;