From ab000ea6a3939972b6eaca78046c4cd7d3aeee22 Mon Sep 17 00:00:00 2001
From: Govind Singh <govinds@codeaurora.org>
Date: Fri, 3 Jan 2020 19:14:14 +0530
Subject: [PATCH] ath10k: Don't call SCM interface for statically mapped msa region
Git-commit: ab000ea6a3939972b6eaca78046c4cd7d3aeee22
Patch-mainline: v5.6-rc1
References: jsc#SLE-13430

For some targets ex: QCS404, SCM permissions for MSA region is
statically configured in TrustZone fw. Add SCM call disable option
for such targets to avoid duplicate permissions.

Testing: Tested on WCN3990 HW
Tested FW: WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/ath/ath10k/qmi.c |    9 +++++++++
 drivers/net/wireless/ath/ath10k/qmi.h |    1 +
 2 files changed, 10 insertions(+)

--- a/drivers/net/wireless/ath/ath10k/qmi.c
+++ b/drivers/net/wireless/ath/ath10k/qmi.c
@@ -84,6 +84,9 @@ static int ath10k_qmi_setup_msa_permissi
 	int ret;
 	int i;
 
+	if (qmi->msa_fixed_perm)
+		return 0;
+
 	for (i = 0; i < qmi->nr_mem_region; i++) {
 		ret = ath10k_qmi_map_msa_permission(qmi, &qmi->mem_region[i]);
 		if (ret)
@@ -102,6 +105,9 @@ static void ath10k_qmi_remove_msa_permis
 {
 	int i;
 
+	if (qmi->msa_fixed_perm)
+		return;
+
 	for (i = 0; i < qmi->nr_mem_region; i++)
 		ath10k_qmi_unmap_msa_permission(qmi, &qmi->mem_region[i]);
 }
@@ -1035,6 +1041,9 @@ static int ath10k_qmi_setup_msa_resource
 		qmi->msa_mem_size = msa_size;
 	}
 
+	if (of_property_read_bool(dev->of_node, "qcom,msa-fixed-perm"))
+		qmi->msa_fixed_perm = true;
+
 	ath10k_dbg(ar, ATH10K_DBG_QMI, "msa pa: %pad , msa va: 0x%p\n",
 		   &qmi->msa_pa,
 		   qmi->msa_va);
--- a/drivers/net/wireless/ath/ath10k/qmi.h
+++ b/drivers/net/wireless/ath/ath10k/qmi.h
@@ -104,6 +104,7 @@ struct ath10k_qmi {
 	bool fw_ready;
 	char fw_build_timestamp[MAX_TIMESTAMP_LEN + 1];
 	struct ath10k_qmi_cal_data cal_data[MAX_NUM_CAL_V01];
+	bool msa_fixed_perm;
 };
 
 int ath10k_qmi_wlan_enable(struct ath10k *ar,