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[06/10] iwlwifi: implement Bz NMI behaviour

Message ID iwlwifi.20210802215208.c9bd2034dc05.I983c25caa09c3776c7640fff73fe739362ecc5b6@changeid
State New
Headers show
Series iwlwifi: updates intended for v5.15 2021-08-02 part 3 | expand

Commit Message

Luca Coelho Aug. 2, 2021, 6:58 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

The method to NMI the firmware also changed in Bz devices,
implement the new logic.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/iwl-csr.h | 4 ++++
 drivers/net/wireless/intel/iwlwifi/iwl-io.c  | 5 ++++-
 2 files changed, 8 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-csr.h b/drivers/net/wireless/intel/iwlwifi/iwl-csr.h
index 704ff2ada122..cf796403c45c 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-csr.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-csr.h
@@ -104,6 +104,10 @@ 
 /* GIO Chicken Bits (PCI Express bus link power management) */
 #define CSR_GIO_CHICKEN_BITS    (CSR_BASE+0x100)
 
+/* Doorbell NMI (since Bz) */
+#define CSR_DOORBELL_VECTOR	(CSR_BASE + 0x130)
+#define CSR_DOORBELL_VECTOR_NMI	BIT(1)
+
 /* host chicken bits */
 #define CSR_HOST_CHICKEN	(CSR_BASE + 0x204)
 #define CSR_HOST_CHICKEN_PM_IDLE_SRC_DIS_SB_PME	BIT(19)
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-io.c b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
index dba54b3297d1..2517c4ae07ab 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-io.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
@@ -213,9 +213,12 @@  void iwl_force_nmi(struct iwl_trans *trans)
 	else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
 		iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER,
 				UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER);
-	else
+	else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
 		iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
 				    UREG_DOORBELL_TO_ISR6_NMI_BIT);
+	else
+		iwl_write32(trans, CSR_DOORBELL_VECTOR,
+			    CSR_DOORBELL_VECTOR_NMI);
 }
 IWL_EXPORT_SYMBOL(iwl_force_nmi);