From 1b6598c3dc35c631aa16279bb17f293c1b5c4ce8 Mon Sep 17 00:00:00 2001
From: Roee Goldfiner <roee.h.goldfiner@intel.com>
Date: Sun, 17 Oct 2021 16:25:54 +0300
Subject: [PATCH] iwlwifi: BZ Family SW reset support
Git-commit: 1b6598c3dc35c631aa16279bb17f293c1b5c4ce8
Patch-mainline: v5.16-rc1
References: bsc#1202131
Previously added BZ reset wasn't taking into account the
call to iwl_trans_pcie_sw_reset which used a pre-BZ logic
to reset the device - enabling iwl_trans_pcie_sw_reset to
support BZ family made this reset redundant.
MAC_ACCESS clear shouldn't be called here but only when calling
_iwl_trans_pcie_stop_device which now support also BZ family.
Signed-off-by: Roee Goldfiner <roee.h.goldfiner@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211017162352.648931fe07e2.Ibf30f9b8e70536da93c4a574ace33d325d3f8da4@changeid
Acked-by: Takashi Iwai <tiwai@suse.de>
---
.../wireless/intel/iwlwifi/pcie/trans-gen2.c | 12 ----------
.../net/wireless/intel/iwlwifi/pcie/trans.c | 24 ++++++++++++++-----
2 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
index a4aad24abb90..d7e11cf8627a 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
@@ -163,18 +163,6 @@ void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans)
else
iwl_pcie_ctxt_info_free(trans);
- /* Make sure (redundant) we've released our request to stay awake */
- if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
- iwl_clear_bit(trans, CSR_GP_CNTRL,
- CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ);
- else
- iwl_clear_bit(trans, CSR_GP_CNTRL,
- CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
-
- if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) {
- iwl_set_bit(trans, CSR_GP_CNTRL,
- CSR_GP_CNTRL_REG_FLAG_SW_RESET);
- }
/* Stop the device, and put it in low power state */
iwl_pcie_gen2_apm_stop(trans, false);
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
index 22393b724e98..12a402be2e06 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
@@ -129,7 +129,12 @@ void iwl_trans_pcie_dump_regs(struct iwl_trans *trans)
static void iwl_trans_pcie_sw_reset(struct iwl_trans *trans)
{
/* Reset entire device - do controller reset (results in SHRD_HW_RST) */
- iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
+ if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
+ iwl_set_bit(trans, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_SW_RESET);
+ else
+ iwl_set_bit(trans, CSR_RESET,
+ CSR_RESET_REG_FLAG_SW_RESET);
usleep_range(5000, 6000);
}
@@ -1209,8 +1214,12 @@ static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans)
}
/* Make sure (redundant) we've released our request to stay awake */
- iwl_clear_bit(trans, CSR_GP_CNTRL,
- CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+ if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
+ iwl_clear_bit(trans, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ);
+ else
+ iwl_clear_bit(trans, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
/* Stop the device, and put it in low power state */
iwl_pcie_apm_stop(trans, false);
@@ -2141,9 +2150,12 @@ static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans)
if (trans_pcie->cmd_hold_nic_awake)
goto out;
-
- __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
- CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+ if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
+ __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ);
+ else
+ __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
/*
* Above we read the CSR_GP_CNTRL register, which will flush
* any previous writes, but we need the write that clears the
--
2.35.3