[PATCH 5.2 105/135] iwlwifi: Add support for SAR South Korea limitation

22 Aug 2019

From: Haim Dreyfuss haim.dreyfuss@intel.com
commit 0c3d7282233c7b02c74400b49981d6fff1d683a8 upstream.
South Korea is adding a more strict SAR limit called "Limb SAR".
Currently, WGDS SAR offset group 3 is not used (not mapped to any country).
In order to be able to comply with South Korea new restriction:
- OEM will use WGDS SAR offset group 3 to South Korea limitation.
- OEM will change WGDS revision to 1 (currently latest revision is 0)
    to notify that Korea Limb SAR applied.
- Driver will read the WGDS table and pass the values to FW (as usual)
- Driver will pass to FW an indication that Korea Limb SAR is applied
    in case table revision is 1.
Signed-off-by: Haim Dreyfuss haim.dreyfuss@intel.com
Signed-off-by: Luca Coelho luciano.coelho@intel.com
Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
---
 drivers/net/wireless/intel/iwlwifi/fw/acpi.c  | 28 ++++++----
 drivers/net/wireless/intel/iwlwifi/fw/acpi.h  |  5 +-
 .../net/wireless/intel/iwlwifi/fw/api/power.h | 12 ++++
 drivers/net/wireless/intel/iwlwifi/fw/file.h  |  3 +
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c   | 55 ++++++++++++++-----
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h  |  1 +
 6 files changed, 76 insertions(+), 28 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
index 405038ce98d68..7573af2d88ce7 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
@@ -97,7 +97,7 @@ IWL_EXPORT_SYMBOL(iwl_acpi_get_object);
union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev,
    				 union acpi_object *data,
-					 int data_size)
+					 int data_size, int *tbl_rev)
 {
    int i;
    union acpi_object *wifi_pkg;
@@ -113,16 +113,19 @@ union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev,
    /*
     * We need at least two packages, one for the revision and one
     * for the data itself.  Also check that the revision is valid
-	 * (i.e. it is an integer set to 0).
+	 * (i.e. it is an integer smaller than 2, as we currently support only
+	 * 2 revisions).
     */
    if (data->type != ACPI_TYPE_PACKAGE ||
        data->package.count < 2 ||
        data->package.elements[0].type != ACPI_TYPE_INTEGER ||
-	    data->package.elements[0].integer.value != 0) {
+	    data->package.elements[0].integer.value > 1) {
    	IWL_DEBUG_DEV_RADIO(dev, "Unsupported packages structure\n");
    	return ERR_PTR(-EINVAL);
    }
+	*tbl_rev = data->package.elements[0].integer.value;
+
    /* loop through all the packages to find the one for WiFi */
    for (i = 1; i < data->package.count; i++) {
    	union acpi_object *domain;
@@ -151,14 +154,15 @@ int iwl_acpi_get_mcc(struct device *dev, char *mcc)
 {
    union acpi_object *wifi_pkg, *data;
    u32 mcc_val;
-	int ret;
+	int ret, tbl_rev;
data = iwl_acpi_get_object(dev, ACPI_WRDD_METHOD);
    if (IS_ERR(data))
    	return PTR_ERR(data);
-	wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_WRDD_WIFI_DATA_SIZE);
-	if (IS_ERR(wifi_pkg)) {
+	wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_WRDD_WIFI_DATA_SIZE,
+					 &tbl_rev);
+	if (IS_ERR(wifi_pkg) || tbl_rev != 0) {
    	ret = PTR_ERR(wifi_pkg);
    	goto out_free;
    }
@@ -185,6 +189,7 @@ u64 iwl_acpi_get_pwr_limit(struct device *dev)
 {
    union acpi_object *data, *wifi_pkg;
    u64 dflt_pwr_limit;
+	int tbl_rev;
data = iwl_acpi_get_object(dev, ACPI_SPLC_METHOD);
    if (IS_ERR(data)) {
@@ -193,8 +198,8 @@ u64 iwl_acpi_get_pwr_limit(struct device *dev)
    }
wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data,
-					 ACPI_SPLC_WIFI_DATA_SIZE);
-	if (IS_ERR(wifi_pkg) ||
+					 ACPI_SPLC_WIFI_DATA_SIZE, &tbl_rev);
+	if (IS_ERR(wifi_pkg) || tbl_rev != 0 ||
        wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER) {
    	dflt_pwr_limit = 0;
    	goto out_free;
@@ -211,14 +216,15 @@ IWL_EXPORT_SYMBOL(iwl_acpi_get_pwr_limit);
 int iwl_acpi_get_eckv(struct device *dev, u32 *extl_clk)
 {
    union acpi_object *wifi_pkg, *data;
-	int ret;
+	int ret, tbl_rev;
data = iwl_acpi_get_object(dev, ACPI_ECKV_METHOD);
    if (IS_ERR(data))
    	return PTR_ERR(data);
-	wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_ECKV_WIFI_DATA_SIZE);
-	if (IS_ERR(wifi_pkg)) {
+	wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_ECKV_WIFI_DATA_SIZE,
+					 &tbl_rev);
+	if (IS_ERR(wifi_pkg) || tbl_rev != 0) {
    	ret = PTR_ERR(wifi_pkg);
    	goto out_free;
    }
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
index f5704e16643fc..991a234509994 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
@@ -97,7 +97,7 @@
 void *iwl_acpi_get_object(struct device *dev, acpi_string method);
 union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev,
    				 union acpi_object *data,
-					 int data_size);
+					 int data_size, int *tbl_rev);
/**
  * iwl_acpi_get_mcc - read MCC from ACPI, if available
@@ -131,7 +131,8 @@ static inline void *iwl_acpi_get_object(struct device *dev, acpi_string method)
static inline union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev,
    					       union acpi_object *data,
-						       int data_size)
+						       int data_size,
+						       int *tbl_rev)
 {
    return ERR_PTR(-ENOENT);
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/power.h b/drivers/net/wireless/intel/iwlwifi/fw/api/power.h
index 01f003c6cff9f..f195db398bedb 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/power.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/power.h
@@ -419,14 +419,26 @@ struct iwl_per_chain_offset_group {
    struct iwl_per_chain_offset hb;
 } __packed; /* PER_CHAIN_LIMIT_OFFSET_GROUP_S_VER_1 */
+/**
+ * struct iwl_geo_tx_power_profile_cmd_v1 - struct for GEO_TX_POWER_LIMIT cmd.
+ * @ops: operations, value from &enum iwl_geo_per_chain_offset_operation
+ * @table: offset profile per band.
+ */
+struct iwl_geo_tx_power_profiles_cmd_v1 {
+	__le32 ops;
+	struct iwl_per_chain_offset_group table[IWL_NUM_GEO_PROFILES];
+} __packed; /* GEO_TX_POWER_LIMIT_VER_1 */
+
 /**
  * struct iwl_geo_tx_power_profile_cmd - struct for GEO_TX_POWER_LIMIT cmd.
  * @ops: operations, value from &enum iwl_geo_per_chain_offset_operation
  * @table: offset profile per band.
+ * @table_revision: BIOS table revision.
  */
 struct iwl_geo_tx_power_profiles_cmd {
    __le32 ops;
    struct iwl_per_chain_offset_group table[IWL_NUM_GEO_PROFILES];
+	__le32 table_revision;
 } __packed; /* GEO_TX_POWER_LIMIT */
/**
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/file.h b/drivers/net/wireless/intel/iwlwifi/fw/file.h
index de9243d301352..a74f34a8dffb0 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/file.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/file.h
@@ -286,6 +286,8 @@ typedef unsigned int __bitwise iwl_ucode_tlv_api_t;
  *	SCAN_OFFLOAD_PROFILES_QUERY_RSP_S.
  * @IWL_UCODE_TLV_API_MBSSID_HE: This ucode supports v2 of
  *	STA_CONTEXT_DOT11AX_API_S
+ * @IWL_UCODE_TLV_CAPA_SAR_TABLE_VER: This ucode supports different sar
+ *	version tables.
  *
  * @NUM_IWL_UCODE_TLV_API: number of bits used
  */
@@ -318,6 +320,7 @@ enum iwl_ucode_tlv_api {
    IWL_UCODE_TLV_API_MBSSID_HE		= (__force iwl_ucode_tlv_api_t)52,
    IWL_UCODE_TLV_API_WOWLAN_TCP_SYN_WAKE	= (__force iwl_ucode_tlv_api_t)53,
    IWL_UCODE_TLV_API_FTM_RTT_ACCURACY      = (__force iwl_ucode_tlv_api_t)54,
+	IWL_UCODE_TLV_API_SAR_TABLE_VER         = (__force iwl_ucode_tlv_api_t)55,
NUM_IWL_UCODE_TLV_API
 #ifdef __CHECKER__
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index 5af9959d05e52..8892707050d5a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -682,15 +682,15 @@ static int iwl_mvm_sar_get_wrds_table(struct iwl_mvm *mvm)
 {
    union acpi_object *wifi_pkg, *table, *data;
    bool enabled;
-	int ret;
+	int ret, tbl_rev;
data = iwl_acpi_get_object(mvm->dev, ACPI_WRDS_METHOD);
    if (IS_ERR(data))
    	return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(mvm->dev, data,
-					 ACPI_WRDS_WIFI_DATA_SIZE);
-	if (IS_ERR(wifi_pkg)) {
+					 ACPI_WRDS_WIFI_DATA_SIZE, &tbl_rev);
+	if (IS_ERR(wifi_pkg) || tbl_rev != 0) {
    	ret = PTR_ERR(wifi_pkg);
    	goto out_free;
    }
@@ -719,15 +719,15 @@ static int iwl_mvm_sar_get_ewrd_table(struct iwl_mvm *mvm)
 {
    union acpi_object *wifi_pkg, *data;
    bool enabled;
-	int i, n_profiles, ret;
+	int i, n_profiles, ret, tbl_rev;
data = iwl_acpi_get_object(mvm->dev, ACPI_EWRD_METHOD);
    if (IS_ERR(data))
    	return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(mvm->dev, data,
-					 ACPI_EWRD_WIFI_DATA_SIZE);
-	if (IS_ERR(wifi_pkg)) {
+					 ACPI_EWRD_WIFI_DATA_SIZE, &tbl_rev);
+	if (IS_ERR(wifi_pkg) || tbl_rev != 0) {
    	ret = PTR_ERR(wifi_pkg);
    	goto out_free;
    }
@@ -778,7 +778,7 @@ static int iwl_mvm_sar_get_ewrd_table(struct iwl_mvm *mvm)
 static int iwl_mvm_sar_get_wgds_table(struct iwl_mvm *mvm)
 {
    union acpi_object *wifi_pkg, *data;
-	int i, j, ret;
+	int i, j, ret, tbl_rev;
    int idx = 1;
data = iwl_acpi_get_object(mvm->dev, ACPI_WGDS_METHOD);
@@ -786,12 +786,13 @@ static int iwl_mvm_sar_get_wgds_table(struct iwl_mvm *mvm)
    	return PTR_ERR(data);
wifi_pkg = iwl_acpi_get_wifi_pkg(mvm->dev, data,
-					 ACPI_WGDS_WIFI_DATA_SIZE);
-	if (IS_ERR(wifi_pkg)) {
+					 ACPI_WGDS_WIFI_DATA_SIZE, &tbl_rev);
+	if (IS_ERR(wifi_pkg) || tbl_rev > 1) {
    	ret = PTR_ERR(wifi_pkg);
    	goto out_free;
    }
+	mvm->geo_rev = tbl_rev;
    for (i = 0; i < ACPI_NUM_GEO_PROFILES; i++) {
    	for (j = 0; j < ACPI_GEO_TABLE_SIZE; j++) {
    		union acpi_object *entry;
@@ -894,15 +895,29 @@ int iwl_mvm_get_sar_geo_profile(struct iwl_mvm *mvm)
 {
    struct iwl_geo_tx_power_profiles_resp *resp;
    int ret;
+	u16 len;
+	void *data;
+	struct iwl_geo_tx_power_profiles_cmd geo_cmd;
+	struct iwl_geo_tx_power_profiles_cmd_v1 geo_cmd_v1;
+	struct iwl_host_cmd cmd;
+
+	if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_SAR_TABLE_VER)) {
+		geo_cmd.ops =
+			cpu_to_le32(IWL_PER_CHAIN_OFFSET_GET_CURRENT_TABLE);
+		len = sizeof(geo_cmd);
+		data = &geo_cmd;
+	} else {
+		geo_cmd_v1.ops =
+			cpu_to_le32(IWL_PER_CHAIN_OFFSET_GET_CURRENT_TABLE);
+		len = sizeof(geo_cmd_v1);
+		data = &geo_cmd_v1;
+	}
-	struct iwl_geo_tx_power_profiles_cmd geo_cmd = {
-		.ops = cpu_to_le32(IWL_PER_CHAIN_OFFSET_GET_CURRENT_TABLE),
-	};
-	struct iwl_host_cmd cmd = {
+	cmd = (struct iwl_host_cmd){
    	.id =  WIDE_ID(PHY_OPS_GROUP, GEO_TX_POWER_LIMIT),
-		.len = { sizeof(geo_cmd), },
+		.len = { len, },
    	.flags = CMD_WANT_SKB,
-		.data = { &geo_cmd },
+		.data = { data },
    };
if (!iwl_mvm_sar_geo_support(mvm))
@@ -969,6 +984,16 @@ static int iwl_mvm_sar_geo_init(struct iwl_mvm *mvm)
    				i, j, value[1], value[2], value[0]);
    	}
    }
+
+	cmd.table_revision = cpu_to_le32(mvm->geo_rev);
+
+	if (!fw_has_api(&mvm->fw->ucode_capa,
+		       IWL_UCODE_TLV_API_SAR_TABLE_VER)) {
+		return iwl_mvm_send_cmd_pdu(mvm, cmd_wide_id, 0,
+				sizeof(struct iwl_geo_tx_power_profiles_cmd_v1),
+				&cmd);
+	}
+
    return iwl_mvm_send_cmd_pdu(mvm, cmd_wide_id, 0, sizeof(cmd), &cmd);
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 88af1f0ba3f0f..ed8fc9a9204ca 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1184,6 +1184,7 @@ struct iwl_mvm {
 #ifdef CONFIG_ACPI
    struct iwl_mvm_sar_profile sar_profiles[ACPI_SAR_PROFILE_NUM];
    struct iwl_mvm_geo_profile geo_profiles[ACPI_NUM_GEO_PROFILES];
+	u32 geo_rev;
 #endif
 };
-- 
2.20.1


    

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[PATCH 5.2 105/135] iwlwifi: Add support for SAR South Korea limitation