wifi: iwlwifi: read SAR tables from UEFI

All the regulatory tables will be read from UEFI, and
only if it doesn't exist - they will be read from ACPI.
Read SAR tables (WRDS, EWRD and WGDS) from UEFI.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240131091413.533b687e1efb.Icb316291e593c8d53f41fdea2d083367dc97e3c4@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 76 insertions, 1 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.h b/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
index bf61a8df1225..3141fca047c6 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
@@ -5,15 +5,24 @@
 #ifndef __iwl_fw_uefi__
 #define __iwl_fw_uefi__
 
+#include "fw/regulatory.h"
+
 #define IWL_UEFI_OEM_PNVM_NAME		L"UefiCnvWlanOemSignedPnvm"
 #define IWL_UEFI_REDUCED_POWER_NAME	L"UefiCnvWlanReducedPower"
 #define IWL_UEFI_SGOM_NAME		L"UefiCnvWlanSarGeoOffsetMapping"
 #define IWL_UEFI_STEP_NAME		L"UefiCnvCommonSTEP"
 #define IWL_UEFI_UATS_NAME		L"CnvUefiWlanUATS"
+#define IWL_UEFI_WRDS_NAME		L"UefiCnvWlanWRDS"
+#define IWL_UEFI_EWRD_NAME		L"UefiCnvWlanEWRD"
+#define IWL_UEFI_WGDS_NAME		L"UefiCnvWlanWGDS"
 
 #define IWL_SGOM_MAP_SIZE		339
 #define IWL_UATS_MAP_SIZE		339
 
+#define IWL_UEFI_WRDS_REVISION		2
+#define IWL_UEFI_EWRD_REVISION		2
+#define IWL_UEFI_WGDS_REVISION		3
+
 struct pnvm_sku_package {
 	u8 rev;
 	u32 total_size;
@@ -42,6 +51,55 @@ struct uefi_cnv_common_step_data {
 } __packed;
 
 /*
+ * struct uefi_sar_profile - a SAR profile as defined in UEFI
+ *
+ * @chains: a per-chain table of SAR values
+ */
+struct uefi_sar_profile {
+	struct iwl_sar_profile_chain chains[BIOS_SAR_MAX_CHAINS_PER_PROFILE];
+} __packed;
+
+/*
+ * struct uefi_cnv_var_wrds - WRDS table as defined in UEFI
+ *
+ * @revision: the revision of the table
+ * @mode: is WRDS enbaled/disabled
+ * @sar_profile: sar profile #1
+ */
+struct uefi_cnv_var_wrds {
+	u8 revision;
+	u32 mode;
+	struct uefi_sar_profile sar_profile;
+} __packed;
+
+/*
+ * struct uefi_cnv_var_ewrd - EWRD table as defined in UEFI
+ * @revision: the revision of the table
+ * @mode: is WRDS enbaled/disabled
+ * @num_profiles: how many additional profiles we have in this table (0-3)
+ * @sar_profiles: the additional SAR profiles (#2-#4)
+ */
+struct uefi_cnv_var_ewrd {
+	u8 revision;
+	u32 mode;
+	u32 num_profiles;
+	struct uefi_sar_profile sar_profiles[BIOS_SAR_MAX_PROFILE_NUM - 1];
+} __packed;
+
+/*
+ * struct uefi_cnv_var_wgds - WGDS table as defined in UEFI
+ * @revision: the revision of the table
+ * @num_profiles: the number of geo profiles we have in the table.
+ *	The first 3 are mandatory, and can have up to 8.
+ * @geo_profiles: a per-profile table of the offsets to add to SAR values.
+ */
+struct uefi_cnv_var_wgds {
+	u8 revision;
+	u8 num_profiles;
+	struct iwl_geo_profile geo_profiles[BIOS_GEO_MAX_PROFILE_NUM];
+} __packed;
+
+/*
  * This is known to be broken on v4.19 and to work on v5.4.  Until we
  * figure out why this is the case and how to make it work, simply
  * disable the feature in old kernels.
@@ -55,6 +113,9 @@ int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,
 void iwl_uefi_get_step_table(struct iwl_trans *trans);
 int iwl_uefi_handle_tlv_mem_desc(struct iwl_trans *trans, const u8 *data,
 				 u32 tlv_len, struct iwl_pnvm_image *pnvm_data);
+int iwl_uefi_get_wrds_table(struct iwl_fw_runtime *fwrt);
+int iwl_uefi_get_ewrd_table(struct iwl_fw_runtime *fwrt);
+int iwl_uefi_get_wgds_table(struct iwl_fw_runtime *fwrt);
 #else /* CONFIG_EFI */
 static inline void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)
 {
@@ -85,6 +146,21 @@ iwl_uefi_handle_tlv_mem_desc(struct iwl_trans *trans, const u8 *data,
 {
 	return 0;
 }
+
+static inline int iwl_uefi_get_wrds_table(struct iwl_fw_runtime *fwrt)
+{
+	return -ENOENT;
+}
+
+static inline int iwl_uefi_get_ewrd_table(struct iwl_fw_runtime *fwrt)
+{
+	return -ENOENT;
+}
+
+static inline int iwl_uefi_get_wgds_table(struct iwl_fw_runtime *fwrt)
+{
+	return -ENOENT;
+}
 #endif /* CONFIG_EFI */
 
 #if defined(CONFIG_EFI) && defined(CONFIG_ACPI)
@@ -103,6 +179,5 @@ int iwl_uefi_get_uats_table(struct iwl_trans *trans,
 {
 	return 0;
 }
-
 #endif
 #endif /* __iwl_fw_uefi__ */