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iwlwifi: pcie: Enable MSI mode when using MSI interrupts

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On some of the chipsets MSI & INTA interrupts are disabled by default in
the HW registers, and need to be explicitly enabled to be used.

In case MSI-X isn't used, make sure MSI mode is enabled by setting
the relevant HW register.

Signed-off-by: Ido Yariv <idox.yariv@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Ido Yariv 2016-06-14 10:27:57 -04:00 committed by Luca Coelho
parent da2830acf1
commit 54f315cb08
2 changed files with 6 additions and 1 deletions
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1
drivers/net/wireless/intel/iwlwifi/iwl-prph.h
View File

@ -417,5 +417,6 @@ enum {
};
#define UREG_CHICK (0xA05C00)
#define UREG_CHICK_MSI_ENABLE BIT(24)
#define UREG_CHICK_MSIX_ENABLE BIT(25)
#endif /* __iwl_prph_h__ */

6
drivers/net/wireless/intel/iwlwifi/pcie/trans.c
View File

@ -1396,8 +1396,12 @@ static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
max_rx_vector = trans_pcie->allocated_vector - 1;
if (!trans_pcie->msix_enabled)
if (!trans_pcie->msix_enabled) {
if (trans->cfg->mq_rx_supported)
iwl_write_prph(trans, UREG_CHICK,
UREG_CHICK_MSI_ENABLE);
return;
}
iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);