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wifi: rtw89: add firmware format version to backward compatible with older drivers

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In the discuss threads [1] [2], new firmware format break user space
because older drivers can't recognize new firmware format. To avoid this,
the new format will be named rtw89/rtw8852b_fw-1.bin and only new driver
try to load it. Old drivers only load original and understandable firmware
rtw89/rtw8852b_fw.bin.

More, new driver will be still backward compatible with old firmware, so
original firmware can be used by new driver.

If there is newer firmware format is introduced, rtw89/rtw8852b_fw-2.bin
will be given. The same rules will be applied like above. So, we will have
firmware like below in linux-firmware in the future.

  rtw89/rtw8852b_fw-2.bin
  rtw89/rtw8852b_fw-1.bin
  rtw89/rtw8852b_fw.bin

After this patch, MODULE_FIRMWARE() of 8852A/B/C become
  rtw89/rtw8852a_fw.bin
  rtw89/rtw8852b_fw-1.bin
  rtw89/rtw8852c_fw.bin

[1] https://lore.kernel.org/linux-wireless/df1ce994-3368-a57e-7078-8bdcccf4a1fd@gmail.com/T/#m24cb43be31a762d0ea70bf07f27ae96c59f6931b
[2] https://bugzilla.kernel.org/show_bug.cgi?id=217207

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230320130606.20777-4-pkshih@realtek.com
This commit is contained in:
Ping-Ke Shih 2023-03-20 21:06:06 +08:00 committed by Kalle Valo
parent b80ad23a8f
commit ffde7f3476
7 changed files with 66 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/realtek/rtw89/core.c
View File

@ -3759,9 +3759,10 @@ struct rtw89_dev *rtw89_alloc_ieee80211_hw(struct device *device,
struct rtw89_dev *rtwdev;
struct ieee80211_ops *ops;
u32 driver_data_size;
int fw_format = -1;
bool no_chanctx;
firmware = rtw89_early_fw_feature_recognize(device, chip, &early_fw);
firmware = rtw89_early_fw_feature_recognize(device, chip, &early_fw, &fw_format);
ops = kmemdup(&rtw89_ops, sizeof(rtw89_ops), GFP_KERNEL);
if (!ops)
@ -3792,6 +3793,7 @@ struct rtw89_dev *rtw89_alloc_ieee80211_hw(struct device *device,
rtwdev->ops = ops;
rtwdev->chip = chip;
rtwdev->fw.req.firmware = firmware;
rtwdev->fw.fw_format = fw_format;
rtw89_debug(rtwdev, RTW89_DBG_FW, "probe driver %s chanctx\n",
no_chanctx ? "without" : "with");

4
drivers/net/wireless/realtek/rtw89/core.h
View File

@ -3080,7 +3080,8 @@ struct rtw89_phy_ul_tb_info {
struct rtw89_chip_info {
enum rtw89_core_chip_id chip_id;
const struct rtw89_chip_ops *ops;
const char *fw_name;
const char *fw_basename;
u8 fw_format_max;
bool try_ce_fw;
u32 fifo_size;
u32 dle_scc_rsvd_size;
@ -3304,6 +3305,7 @@ struct rtw89_fw_req_info {
struct rtw89_fw_info {
struct rtw89_fw_req_info req;
int fw_format;
u8 h2c_seq;
u8 rec_seq;
u8 h2c_counter;

25
drivers/net/wireless/realtek/rtw89/fw.c
View File

@ -302,11 +302,14 @@ static void rtw89_fw_recognize_features(struct rtw89_dev *rtwdev)
const struct firmware *
rtw89_early_fw_feature_recognize(struct device *device,
const struct rtw89_chip_info *chip,
struct rtw89_fw_info *early_fw)
struct rtw89_fw_info *early_fw,
int *used_fw_format)
{
union rtw89_compat_fw_hdr buf = {};
const struct firmware *firmware;
bool full_req = false;
char fw_name[64];
int fw_format;
u32 ver_code;
int ret;
@ -317,12 +320,22 @@ rtw89_early_fw_feature_recognize(struct device *device,
if (IS_ENABLED(CONFIG_SECURITY_LOADPIN_ENFORCE))
full_req = true;
for (fw_format = chip->fw_format_max; fw_format >= 0; fw_format--) {
rtw89_fw_get_filename(fw_name, sizeof(fw_name),
chip->fw_basename, fw_format);
if (full_req)
ret = request_firmware(&firmware, chip->fw_name, device);
ret = request_firmware(&firmware, fw_name, device);
else
ret = request_partial_firmware_into_buf(&firmware, chip->fw_name,
ret = request_partial_firmware_into_buf(&firmware, fw_name,
device, &buf, sizeof(buf),
0);
if (!ret) {
dev_info(device, "loaded firmware %s\n", fw_name);
*used_fw_format = fw_format;
break;
}
}
if (ret) {
dev_err(device, "failed to early request firmware: %d\n", ret);
@ -666,7 +679,11 @@ void rtw89_load_firmware_work(struct work_struct *work)
{
struct rtw89_dev *rtwdev =
container_of(work, struct rtw89_dev, load_firmware_work);
const char *fw_name = rtwdev->chip->fw_name;
const struct rtw89_chip_info *chip = rtwdev->chip;
char fw_name[64];
rtw89_fw_get_filename(fw_name, sizeof(fw_name),
chip->fw_basename, rtwdev->fw.fw_format);
rtw89_load_firmware_req(rtwdev, &rtwdev->fw.req, fw_name, false);
}

12
drivers/net/wireless/realtek/rtw89/fw.h
View File

@ -3515,6 +3515,15 @@ static inline u32 rtw89_compat_fw_hdr_ver_code(const void *fw_buf)
return RTW89_FW_HDR_VER_CODE(&compat->fw_hdr);
}
static inline void rtw89_fw_get_filename(char *buf, size_t size,
const char *fw_basename, int fw_format)
{
if (fw_format <= 0)
snprintf(buf, size, "%s.bin", fw_basename);
else
snprintf(buf, size, "%s-%d.bin", fw_basename, fw_format);
}
#define RTW89_H2C_RF_PAGE_SIZE 500
#define RTW89_H2C_RF_PAGE_NUM 3
struct rtw89_fw_h2c_rf_reg_info {
@ -3658,7 +3667,8 @@ int rtw89_fw_recognize(struct rtw89_dev *rtwdev);
const struct firmware *
rtw89_early_fw_feature_recognize(struct device *device,
const struct rtw89_chip_info *chip,
struct rtw89_fw_info *early_fw);
struct rtw89_fw_info *early_fw,
int *used_fw_format);
int rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type);
void rtw89_load_firmware_work(struct work_struct *work);
void rtw89_unload_firmware(struct rtw89_dev *rtwdev);

10
drivers/net/wireless/realtek/rtw89/rtw8852a.c
View File

@ -12,6 +12,11 @@
#include "rtw8852a_table.h"
#include "txrx.h"
#define RTW8852A_FW_FORMAT_MAX 0
#define RTW8852A_FW_BASENAME "rtw89/rtw8852a_fw"
#define RTW8852A_MODULE_FIRMWARE \
RTW8852A_FW_BASENAME ".bin"
static const struct rtw89_hfc_ch_cfg rtw8852a_hfc_chcfg_pcie[] = {
{128, 1896, grp_0}, /* ACH 0 */
{128, 1896, grp_0}, /* ACH 1 */
@ -2059,7 +2064,8 @@ static const struct rtw89_chip_ops rtw8852a_chip_ops = {
const struct rtw89_chip_info rtw8852a_chip_info = {
.chip_id = RTL8852A,
.ops = &rtw8852a_chip_ops,
.fw_name = "rtw89/rtw8852a_fw.bin",
.fw_basename = RTW8852A_FW_BASENAME,
.fw_format_max = RTW8852A_FW_FORMAT_MAX,
.try_ce_fw = false,
.fifo_size = 458752,
.dle_scc_rsvd_size = 0,
@ -2156,7 +2162,7 @@ const struct rtw89_chip_info rtw8852a_chip_info = {
};
EXPORT_SYMBOL(rtw8852a_chip_info);
MODULE_FIRMWARE("rtw89/rtw8852a_fw.bin");
MODULE_FIRMWARE(RTW8852A_MODULE_FIRMWARE);
MODULE_AUTHOR("Realtek Corporation");
MODULE_DESCRIPTION("Realtek 802.11ax wireless 8852A driver");
MODULE_LICENSE("Dual BSD/GPL");

10
drivers/net/wireless/realtek/rtw89/rtw8852b.c
View File

@ -12,6 +12,11 @@
#include "rtw8852b_table.h"
#include "txrx.h"
#define RTW8852B_FW_FORMAT_MAX 1
#define RTW8852B_FW_BASENAME "rtw89/rtw8852b_fw"
#define RTW8852B_MODULE_FIRMWARE \
RTW8852B_FW_BASENAME "-" __stringify(RTW8852B_FW_FORMAT_MAX) ".bin"
static const struct rtw89_hfc_ch_cfg rtw8852b_hfc_chcfg_pcie[] = {
{5, 343, grp_0}, /* ACH 0 */
{5, 343, grp_0}, /* ACH 1 */
@ -2480,7 +2485,8 @@ static const struct rtw89_chip_ops rtw8852b_chip_ops = {
const struct rtw89_chip_info rtw8852b_chip_info = {
.chip_id = RTL8852B,
.ops = &rtw8852b_chip_ops,
.fw_name = "rtw89/rtw8852b_fw.bin",
.fw_basename = RTW8852B_FW_BASENAME,
.fw_format_max = RTW8852B_FW_FORMAT_MAX,
.try_ce_fw = true,
.fifo_size = 196608,
.dle_scc_rsvd_size = 98304,
@ -2576,7 +2582,7 @@ const struct rtw89_chip_info rtw8852b_chip_info = {
};
EXPORT_SYMBOL(rtw8852b_chip_info);
MODULE_FIRMWARE("rtw89/rtw8852b_fw.bin");
MODULE_FIRMWARE(RTW8852B_MODULE_FIRMWARE);
MODULE_AUTHOR("Realtek Corporation");
MODULE_DESCRIPTION("Realtek 802.11ax wireless 8852B driver");
MODULE_LICENSE("Dual BSD/GPL");

10
drivers/net/wireless/realtek/rtw89/rtw8852c.c
View File

@ -13,6 +13,11 @@
#include "rtw8852c_table.h"
#include "util.h"
#define RTW8852C_FW_FORMAT_MAX 0
#define RTW8852C_FW_BASENAME "rtw89/rtw8852c_fw"
#define RTW8852C_MODULE_FIRMWARE \
RTW8852C_FW_BASENAME ".bin"
static const struct rtw89_hfc_ch_cfg rtw8852c_hfc_chcfg_pcie[] = {
{13, 1614, grp_0}, /* ACH 0 */
{13, 1614, grp_0}, /* ACH 1 */
@ -2791,7 +2796,8 @@ static const struct rtw89_chip_ops rtw8852c_chip_ops = {
const struct rtw89_chip_info rtw8852c_chip_info = {
.chip_id = RTL8852C,
.ops = &rtw8852c_chip_ops,
.fw_name = "rtw89/rtw8852c_fw.bin",
.fw_basename = RTW8852C_FW_BASENAME,
.fw_format_max = RTW8852C_FW_FORMAT_MAX,
.try_ce_fw = false,
.fifo_size = 458752,
.dle_scc_rsvd_size = 0,
@ -2892,7 +2898,7 @@ const struct rtw89_chip_info rtw8852c_chip_info = {
};
EXPORT_SYMBOL(rtw8852c_chip_info);
MODULE_FIRMWARE("rtw89/rtw8852c_fw.bin");
MODULE_FIRMWARE(RTW8852C_MODULE_FIRMWARE);
MODULE_AUTHOR("Realtek Corporation");
MODULE_DESCRIPTION("Realtek 802.11ax wireless 8852C driver");
MODULE_LICENSE("Dual BSD/GPL");