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iwlwifi: acpi: move ppag code from mvm to fw/acpi
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Move the ppag code to fw/acpi to keep consistency
with the other ACPI handling we do.

Signed-off-by: Matt Chen <matt.chen@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220304131517.7f250088b443.I61e64c2758ad178da729ce00428287cc94430eed@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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Matt Chen authored and Luca Coelho committed Mar 10, 2022
1 parent 9737451 commit e8e10a3
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Showing 3 changed files with 234 additions and 184 deletions.
203 changes: 203 additions & 0 deletions drivers/net/wireless/intel/iwlwifi/fw/acpi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
* Copyright (C) 2019-2021 Intel Corporation
*/
#include <linux/uuid.h>
#include <linux/dmi.h>
#include "iwl-drv.h"
#include "iwl-debug.h"
#include "acpi.h"
Expand All @@ -19,6 +20,30 @@ const guid_t iwl_rfi_guid = GUID_INIT(0x7266172C, 0x220B, 0x4B29,
0xDD, 0x26, 0xB5, 0xFD);
IWL_EXPORT_SYMBOL(iwl_rfi_guid);

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."),
},
},
{}
};

static int iwl_acpi_get_handle(struct device *dev, acpi_string method,
acpi_handle *ret_handle)
{
Expand Down Expand Up @@ -971,3 +996,181 @@ __le32 iwl_acpi_get_lari_config_bitmap(struct iwl_fw_runtime *fwrt)
return config_bitmap;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_lari_config_bitmap);

int iwl_acpi_get_ppag_table(struct iwl_fw_runtime *fwrt)
{
union acpi_object *wifi_pkg, *data, *flags;
int i, j, ret, tbl_rev, num_sub_bands = 0;
int idx = 2;

fwrt->ppag_flags = 0;

data = iwl_acpi_get_object(fwrt->dev, ACPI_PPAG_METHOD);
if (IS_ERR(data))
return PTR_ERR(data);

/* try to read ppag table rev 2 or 1 (both have the same data size) */
wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
ACPI_PPAG_WIFI_DATA_SIZE_V2, &tbl_rev);

if (!IS_ERR(wifi_pkg)) {
if (tbl_rev == 1 || tbl_rev == 2) {
num_sub_bands = IWL_NUM_SUB_BANDS_V2;
IWL_DEBUG_RADIO(fwrt,
"Reading PPAG table v2 (tbl_rev=%d)\n",
tbl_rev);
goto read_table;
} else {
ret = -EINVAL;
goto out_free;
}
}

/* try to read ppag table revision 0 */
wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
ACPI_PPAG_WIFI_DATA_SIZE_V1, &tbl_rev);

if (!IS_ERR(wifi_pkg)) {
if (tbl_rev != 0) {
ret = -EINVAL;
goto out_free;
}
num_sub_bands = IWL_NUM_SUB_BANDS_V1;
IWL_DEBUG_RADIO(fwrt, "Reading PPAG table v1 (tbl_rev=0)\n");
goto read_table;
}

read_table:
fwrt->ppag_ver = tbl_rev;
flags = &wifi_pkg->package.elements[1];

if (flags->type != ACPI_TYPE_INTEGER) {
ret = -EINVAL;
goto out_free;
}

fwrt->ppag_flags = flags->integer.value & ACPI_PPAG_MASK;

if (!fwrt->ppag_flags) {
ret = 0;
goto out_free;
}

/*
* read, verify gain values and save them into the PPAG table.
* first sub-band (j=0) corresponds to Low-Band (2.4GHz), and the
* following sub-bands to High-Band (5GHz).
*/
for (i = 0; i < IWL_NUM_CHAIN_LIMITS; i++) {
for (j = 0; j < num_sub_bands; j++) {
union acpi_object *ent;

ent = &wifi_pkg->package.elements[idx++];
if (ent->type != ACPI_TYPE_INTEGER) {
ret = -EINVAL;
goto out_free;
}

fwrt->ppag_chains[i].subbands[j] = ent->integer.value;

if ((j == 0 &&
(fwrt->ppag_chains[i].subbands[j] > ACPI_PPAG_MAX_LB ||
fwrt->ppag_chains[i].subbands[j] < ACPI_PPAG_MIN_LB)) ||
(j != 0 &&
(fwrt->ppag_chains[i].subbands[j] > ACPI_PPAG_MAX_HB ||
fwrt->ppag_chains[i].subbands[j] < ACPI_PPAG_MIN_HB))) {
fwrt->ppag_flags = 0;
ret = -EINVAL;
goto out_free;
}
}
}


ret = 0;

out_free:
kfree(data);
return ret;
}
IWL_EXPORT_SYMBOL(iwl_acpi_get_ppag_table);

int iwl_read_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;

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;
}
if (!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);
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 (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) {
IWL_DEBUG_RADIO(fwrt,
"PPAG table rev is %d but FW supports v1, sending truncated table\n",
fwrt->ppag_ver);
cmd->v1.flags &= cpu_to_le32(IWL_PPAG_ETSI_MASK);
}
} else if (cmd_ver == 2 || cmd_ver == 3) {
num_sub_bands = IWL_NUM_SUB_BANDS_V2;
gain = cmd->v2.gain[0];
*cmd_size = sizeof(cmd->v2);
if (fwrt->ppag_ver == 0) {
IWL_DEBUG_RADIO(fwrt,
"PPAG table is v1 but FW supports v2, sending padded table\n");
} else if (cmd_ver == 2 && fwrt->ppag_ver == 2) {
IWL_DEBUG_RADIO(fwrt,
"PPAG table is v3 but FW supports v2, sending partial bitmap.\n");
cmd->v1.flags &= cpu_to_le32(IWL_PPAG_ETSI_MASK);
}
} else {
IWL_DEBUG_RADIO(fwrt, "Unsupported PPAG command version\n");
return -EINVAL;
}

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_read_ppag_table);

bool iwl_acpi_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_acpi_is_ppag_approved);
25 changes: 25 additions & 0 deletions drivers/net/wireless/intel/iwlwifi/fw/acpi.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,8 @@
#define ACPI_PPAG_MAX_LB 24
#define ACPI_PPAG_MIN_HB -16
#define ACPI_PPAG_MAX_HB 40
#define ACPI_PPAG_MASK 3
#define IWL_PPAG_ETSI_MASK BIT(0)

#define IWL_SAR_ENABLE_MSK BIT(0)
#define IWL_REDUCE_POWER_FLAGS_POS 1
Expand Down Expand Up @@ -223,6 +225,13 @@ int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,

__le32 iwl_acpi_get_lari_config_bitmap(struct iwl_fw_runtime *fwrt);

int iwl_acpi_get_ppag_table(struct iwl_fw_runtime *fwrt);

int iwl_read_ppag_table(struct iwl_fw_runtime *fwrt, union iwl_ppag_table_cmd *cmd,
int *cmd_size);

bool iwl_acpi_is_ppag_approved(struct iwl_fw_runtime *fwrt);

#else /* CONFIG_ACPI */

static inline void *iwl_acpi_get_object(struct device *dev, acpi_string method)
Expand Down Expand Up @@ -310,6 +319,22 @@ static inline __le32 iwl_acpi_get_lari_config_bitmap(struct iwl_fw_runtime *fwrt
return 0;
}

static inline int iwl_acpi_get_ppag_table(struct iwl_fw_runtime *fwrt)
{
return -ENOENT;
}

static inline int iwl_read_ppag_table(struct iwl_fw_runtime *fwrt,
union iwl_ppag_table_cmd *cmd, int *cmd_size)
{
return -ENOENT;
}

static inline bool iwl_acpi_is_ppag_approved(struct iwl_fw_runtime *fwrt)
{
return false;
}

#endif /* CONFIG_ACPI */

static inline union acpi_object *
Expand Down
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