wifi: iwlwifi: prepare for reading PPAG table from UEFI

As PPAG table is going to be read from UEFI, there are some
cleanups required:
Move functions/definitions that are common to both UEFI and ACPI to
regulatory.h/c.
In addition, rename the functions/macros names so it will be clear which
one is ACPI specific, and which is common for ACPI and UEFI.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240131091413.25623670b422.I8132af7517e4faf0ea8cbeb2efe9651edd319b98@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 161 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
index 862d8b8b0fc9..2393c8a8e288 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
@@ -2,6 +2,7 @@
 /*
  * Copyright (C) 2023 Intel Corporation
  */
+#include <linux/dmi.h>
 #include "iwl-drv.h"
 #include "iwl-debug.h"
 #include "regulatory.h"
@@ -24,6 +25,63 @@ IWL_BIOS_TABLE_LOADER(wrds);
 IWL_BIOS_TABLE_LOADER(ewrd);
 IWL_BIOS_TABLE_LOADER(wgds);
 
+static const struct dmi_system_id dmi_ppag_approved_list[] = {
+	{ .ident = "HP",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+		},
+	},
+	{ .ident = "SAMSUNG",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD"),
+		},
+	},
+	{ .ident = "MSFT",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+		},
+	},
+	{ .ident = "ASUS",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+		},
+	},
+	{ .ident = "GOOGLE-HP",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Google"),
+			DMI_MATCH(DMI_BOARD_VENDOR, "HP"),
+		},
+	},
+	{ .ident = "GOOGLE-ASUS",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Google"),
+			DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek COMPUTER INC."),
+		},
+	},
+	{ .ident = "GOOGLE-SAMSUNG",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Google"),
+			DMI_MATCH(DMI_BOARD_VENDOR, "SAMSUNG ELECTRONICS CO., LTD"),
+		},
+	},
+	{ .ident = "DELL",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+		},
+	},
+	{ .ident = "DELL",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
+		},
+	},
+	{ .ident = "RAZER",
+	  .matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Razer"),
+		},
+	},
+	{}
+};
+
 bool iwl_sar_geo_support(struct iwl_fw_runtime *fwrt)
 {
 	/*
@@ -147,3 +205,106 @@ int iwl_sar_fill_profile(struct iwl_fw_runtime *fwrt,
 	return ret;
 }
 IWL_EXPORT_SYMBOL(iwl_sar_fill_profile);
+
+int iwl_fill_ppag_table(struct iwl_fw_runtime *fwrt,
+			union iwl_ppag_table_cmd *cmd, int *cmd_size)
+{
+	u8 cmd_ver;
+	int i, j, num_sub_bands;
+	s8 *gain;
+
+	/* many firmware images for JF lie about this */
+	if (CSR_HW_RFID_TYPE(fwrt->trans->hw_rf_id) ==
+	    CSR_HW_RFID_TYPE(CSR_HW_RF_ID_TYPE_JF))
+		return -EOPNOTSUPP;
+
+	if (!fw_has_capa(&fwrt->fw->ucode_capa, IWL_UCODE_TLV_CAPA_SET_PPAG)) {
+		IWL_DEBUG_RADIO(fwrt,
+				"PPAG capability not supported by FW, command not sent.\n");
+		return -EINVAL;
+	}
+
+	cmd_ver = iwl_fw_lookup_cmd_ver(fwrt->fw,
+					WIDE_ID(PHY_OPS_GROUP,
+						PER_PLATFORM_ANT_GAIN_CMD),
+					IWL_FW_CMD_VER_UNKNOWN);
+	if (!fwrt->ppag_table_valid || (cmd_ver <= 3 && !fwrt->ppag_flags)) {
+		IWL_DEBUG_RADIO(fwrt, "PPAG not enabled, command not sent.\n");
+		return -EINVAL;
+	}
+
+	/* The 'flags' field is the same in v1 and in v2 so we can just
+	 * use v1 to access it.
+	 */
+	cmd->v1.flags = cpu_to_le32(fwrt->ppag_flags);
+
+	IWL_DEBUG_RADIO(fwrt, "PPAG cmd ver is %d\n", cmd_ver);
+	if (cmd_ver == 1) {
+		num_sub_bands = IWL_NUM_SUB_BANDS_V1;
+		gain = cmd->v1.gain[0];
+		*cmd_size = sizeof(cmd->v1);
+		if (fwrt->ppag_ver == 1 || fwrt->ppag_ver == 2) {
+			/* in this case FW supports revision 0 */
+			IWL_DEBUG_RADIO(fwrt,
+					"PPAG table rev is %d, send truncated table\n",
+					fwrt->ppag_ver);
+		}
+	} else if (cmd_ver >= 2 && cmd_ver <= 4) {
+		num_sub_bands = IWL_NUM_SUB_BANDS_V2;
+		gain = cmd->v2.gain[0];
+		*cmd_size = sizeof(cmd->v2);
+		if (fwrt->ppag_ver == 0) {
+			/* in this case FW supports revisions 1 or 2 */
+			IWL_DEBUG_RADIO(fwrt,
+					"PPAG table rev is 0, send padded table\n");
+		}
+	} else {
+		IWL_DEBUG_RADIO(fwrt, "Unsupported PPAG command version\n");
+		return -EINVAL;
+	}
+
+	/* ppag mode */
+	IWL_DEBUG_RADIO(fwrt,
+			"PPAG MODE bits were read from bios: %d\n",
+			cmd->v1.flags);
+	if ((cmd_ver == 1 &&
+	     !fw_has_capa(&fwrt->fw->ucode_capa,
+			  IWL_UCODE_TLV_CAPA_PPAG_CHINA_BIOS_SUPPORT)) ||
+	    (cmd_ver == 2 && fwrt->ppag_ver == 2)) {
+		cmd->v1.flags &= cpu_to_le32(IWL_PPAG_ETSI_MASK);
+		IWL_DEBUG_RADIO(fwrt, "masking ppag China bit\n");
+	} else {
+		IWL_DEBUG_RADIO(fwrt, "isn't masking ppag China bit\n");
+	}
+
+	IWL_DEBUG_RADIO(fwrt,
+			"PPAG MODE bits going to be sent: %d\n",
+			cmd->v1.flags);
+
+	for (i = 0; i < IWL_NUM_CHAIN_LIMITS; i++) {
+		for (j = 0; j < num_sub_bands; j++) {
+			gain[i * num_sub_bands + j] =
+				fwrt->ppag_chains[i].subbands[j];
+			IWL_DEBUG_RADIO(fwrt,
+					"PPAG table: chain[%d] band[%d]: gain = %d\n",
+					i, j, gain[i * num_sub_bands + j]);
+		}
+	}
+
+	return 0;
+}
+IWL_EXPORT_SYMBOL(iwl_fill_ppag_table);
+
+bool iwl_is_ppag_approved(struct iwl_fw_runtime *fwrt)
+{
+	if (!dmi_check_system(dmi_ppag_approved_list)) {
+		IWL_DEBUG_RADIO(fwrt,
+				"System vendor '%s' is not in the approved list, disabling PPAG.\n",
+				dmi_get_system_info(DMI_SYS_VENDOR));
+				fwrt->ppag_flags = 0;
+				return false;
+	}
+
+	return true;
+}
+IWL_EXPORT_SYMBOL(iwl_is_ppag_approved);