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Bluetooth: btrtl: Add Realtek devcoredump support

Browse Source 
Catch debug exception from controller and driver, and trigger a
devcoredump using hci devcoredump APIs. The debug exception data
will be parsed in userspace.

Signed-off-by: Alex Lu <alex_lu@realsil.com.cn>
Signed-off-by: Hilda Wu <hildawu@realtek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Hilda Wu 2023-04-27 11:27:55 +08:00 committed by Luiz Augusto von Dentz
parent ae75336131
commit 044014ce85
3 changed files with 205 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

145
drivers/bluetooth/btrtl.c
View File

@ -32,6 +32,8 @@
#define RTL_ROM_LMP_8851B 0x8851
#define RTL_CONFIG_MAGIC 0x8723ab55
#define RTL_VSC_OP_COREDUMP 0xfcff
#define IC_MATCH_FL_LMPSUBV (1 << 0)
#define IC_MATCH_FL_HCIREV (1 << 1)
#define IC_MATCH_FL_HCIVER (1 << 2)
@ -81,6 +83,7 @@ struct id_table {
bool has_msft_ext;
char *fw_name;
char *cfg_name;
char *hw_info;
};
struct btrtl_device_info {
@ -102,21 +105,24 @@ static const struct id_table ic_id_table[] = {
.config_needed = false,
.has_rom_version = false,
.fw_name = "rtl_bt/rtl8723a_fw.bin",
.cfg_name = NULL },
.cfg_name = NULL,
.hw_info = "rtl8723au" },
/* 8723BS */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723bs_fw.bin",
.cfg_name = "rtl_bt/rtl8723bs_config" },
.cfg_name = "rtl_bt/rtl8723bs_config",
.hw_info = "rtl8723bs" },
/* 8723B */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723b_fw.bin",
.cfg_name = "rtl_bt/rtl8723b_config" },
.cfg_name = "rtl_bt/rtl8723b_config",
.hw_info = "rtl8723bu" },
/* 8723CS-CG */
{ .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
@ -127,7 +133,8 @@ static const struct id_table ic_id_table[] = {
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723cs_cg_fw.bin",
.cfg_name = "rtl_bt/rtl8723cs_cg_config" },
.cfg_name = "rtl_bt/rtl8723cs_cg_config",
.hw_info = "rtl8723cs-cg" },
/* 8723CS-VF */
{ .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
@ -138,7 +145,8 @@ static const struct id_table ic_id_table[] = {
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723cs_vf_fw.bin",
.cfg_name = "rtl_bt/rtl8723cs_vf_config" },
.cfg_name = "rtl_bt/rtl8723cs_vf_config",
.hw_info = "rtl8723cs-vf" },
/* 8723CS-XX */
{ .match_flags = IC_MATCH_FL_LMPSUBV | IC_MATCH_FL_CHIP_TYPE |
@ -149,28 +157,32 @@ static const struct id_table ic_id_table[] = {
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723cs_xx_fw.bin",
.cfg_name = "rtl_bt/rtl8723cs_xx_config" },
.cfg_name = "rtl_bt/rtl8723cs_xx_config",
.hw_info = "rtl8723cs" },
/* 8723D */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_USB),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723d_fw.bin",
.cfg_name = "rtl_bt/rtl8723d_config" },
.cfg_name = "rtl_bt/rtl8723d_config",
.hw_info = "rtl8723du" },
/* 8723DS */
{ IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_UART),
.config_needed = true,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8723ds_fw.bin",
.cfg_name = "rtl_bt/rtl8723ds_config" },
.cfg_name = "rtl_bt/rtl8723ds_config",
.hw_info = "rtl8723ds" },
/* 8821A */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xa, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8821a_fw.bin",
.cfg_name = "rtl_bt/rtl8821a_config" },
.cfg_name = "rtl_bt/rtl8821a_config",
.hw_info = "rtl8821au" },
/* 8821C */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_USB),
@ -178,7 +190,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8821c_fw.bin",
.cfg_name = "rtl_bt/rtl8821c_config" },
.cfg_name = "rtl_bt/rtl8821c_config",
.hw_info = "rtl8821cu" },
/* 8821CS */
{ IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_UART),
@ -186,14 +199,16 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8821cs_fw.bin",
.cfg_name = "rtl_bt/rtl8821cs_config" },
.cfg_name = "rtl_bt/rtl8821cs_config",
.hw_info = "rtl8821cs" },
/* 8761A */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8761a_fw.bin",
.cfg_name = "rtl_bt/rtl8761a_config" },
.cfg_name = "rtl_bt/rtl8761a_config",
.hw_info = "rtl8761au" },
/* 8761B */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_UART),
@ -201,14 +216,16 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8761b_fw.bin",
.cfg_name = "rtl_bt/rtl8761b_config" },
.cfg_name = "rtl_bt/rtl8761b_config",
.hw_info = "rtl8761btv" },
/* 8761BU */
{ IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_USB),
.config_needed = false,
.has_rom_version = true,
.fw_name = "rtl_bt/rtl8761bu_fw.bin",
.cfg_name = "rtl_bt/rtl8761bu_config" },
.cfg_name = "rtl_bt/rtl8761bu_config",
.hw_info = "rtl8761bu" },
/* 8822C with UART interface */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0x8, HCI_UART),
@ -216,7 +233,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822cs_fw.bin",
.cfg_name = "rtl_bt/rtl8822cs_config" },
.cfg_name = "rtl_bt/rtl8822cs_config",
.hw_info = "rtl8822cs" },
/* 8822C with UART interface */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_UART),
@ -224,7 +242,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822cs_fw.bin",
.cfg_name = "rtl_bt/rtl8822cs_config" },
.cfg_name = "rtl_bt/rtl8822cs_config",
.hw_info = "rtl8822cs" },
/* 8822C with USB interface */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0xa, HCI_USB),
@ -232,7 +251,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822cu_fw.bin",
.cfg_name = "rtl_bt/rtl8822cu_config" },
.cfg_name = "rtl_bt/rtl8822cu_config",
.hw_info = "rtl8822cu" },
/* 8822B */
{ IC_INFO(RTL_ROM_LMP_8822B, 0xb, 0x7, HCI_USB),
@ -240,7 +260,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8822b_fw.bin",
.cfg_name = "rtl_bt/rtl8822b_config" },
.cfg_name = "rtl_bt/rtl8822b_config",
.hw_info = "rtl8822bu" },
/* 8852A */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xa, 0xb, HCI_USB),
@ -248,7 +269,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852au_fw.bin",
.cfg_name = "rtl_bt/rtl8852au_config" },
.cfg_name = "rtl_bt/rtl8852au_config",
.hw_info = "rtl8852au" },
/* 8852B with UART interface */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_UART),
@ -256,7 +278,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852bs_fw.bin",
.cfg_name = "rtl_bt/rtl8852bs_config" },
.cfg_name = "rtl_bt/rtl8852bs_config",
.hw_info = "rtl8852bs" },
/* 8852B */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xb, 0xb, HCI_USB),
@ -264,7 +287,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852bu_fw.bin",
.cfg_name = "rtl_bt/rtl8852bu_config" },
.cfg_name = "rtl_bt/rtl8852bu_config",
.hw_info = "rtl8852bu" },
/* 8852C */
{ IC_INFO(RTL_ROM_LMP_8852A, 0xc, 0xc, HCI_USB),
@ -272,7 +296,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = true,
.fw_name = "rtl_bt/rtl8852cu_fw.bin",
.cfg_name = "rtl_bt/rtl8852cu_config" },
.cfg_name = "rtl_bt/rtl8852cu_config",
.hw_info = "rtl8852cu" },
/* 8851B */
{ IC_INFO(RTL_ROM_LMP_8851B, 0xb, 0xc, HCI_USB),
@ -280,7 +305,8 @@ static const struct id_table ic_id_table[] = {
.has_rom_version = true,
.has_msft_ext = false,
.fw_name = "rtl_bt/rtl8851bu_fw.bin",
.cfg_name = "rtl_bt/rtl8851bu_config" },
.cfg_name = "rtl_bt/rtl8851bu_config",
.hw_info = "rtl8851bu" },
};
static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
@ -590,6 +616,7 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev,
unsigned char **_buf)
{
static const u8 extension_sig[] = { 0x51, 0x04, 0xfd, 0x77 };
struct btrealtek_data *coredump_info = hci_get_priv(hdev);
struct rtl_epatch_header *epatch_info;
unsigned char *buf;
int i, len;
@ -705,8 +732,10 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev,
epatch_info = (struct rtl_epatch_header *)btrtl_dev->fw_data;
num_patches = le16_to_cpu(epatch_info->num_patches);
BT_DBG("fw_version=%x, num_patches=%d",
le32_to_cpu(epatch_info->fw_version), num_patches);
coredump_info->rtl_dump.fw_version = le32_to_cpu(epatch_info->fw_version);
/* After the rtl_epatch_header there is a funky patch metadata section.
* Assuming 2 patches, the layout is:
@ -903,6 +932,53 @@ out:
return ret;
}
static void btrtl_coredump(struct hci_dev *hdev)
{
static const u8 param[] = { 0x00, 0x00 };
__hci_cmd_send(hdev, RTL_VSC_OP_COREDUMP, sizeof(param), param);
}
static void btrtl_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btrealtek_data *coredump_info = hci_get_priv(hdev);
char buf[80];
if (coredump_info->rtl_dump.controller)
snprintf(buf, sizeof(buf), "Controller Name: %s\n",
coredump_info->rtl_dump.controller);
else
snprintf(buf, sizeof(buf), "Controller Name: Unknown\n");
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n",
coredump_info->rtl_dump.fw_version);
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Driver: %s\n", coredump_info->rtl_dump.driver_name);
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Vendor: Realtek\n");
skb_put_data(skb, buf, strlen(buf));
}
static int btrtl_register_devcoredump_support(struct hci_dev *hdev)
{
int err;
err = hci_devcd_register(hdev, btrtl_coredump, btrtl_dmp_hdr, NULL);
return err;
}
void btrtl_set_driver_name(struct hci_dev *hdev, const char *driver_name)
{
struct btrealtek_data *coredump_info = hci_get_priv(hdev);
coredump_info->rtl_dump.driver_name = driver_name;
}
EXPORT_SYMBOL_GPL(btrtl_set_driver_name);
static bool rtl_has_chip_type(u16 lmp_subver)
{
switch (lmp_subver) {
@ -964,6 +1040,7 @@ EXPORT_SYMBOL_GPL(btrtl_free);
struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
const char *postfix)
{
struct btrealtek_data *coredump_info = hci_get_priv(hdev);
struct btrtl_device_info *btrtl_dev;
struct sk_buff *skb;
struct hci_rp_read_local_version *resp;
@ -1113,6 +1190,9 @@ next:
if (btrtl_dev->ic_info->has_msft_ext)
hci_set_msft_opcode(hdev, 0xFCF0);
if (btrtl_dev->ic_info)
coredump_info->rtl_dump.controller = btrtl_dev->ic_info->hw_info;
return btrtl_dev;
err_free:
@ -1125,6 +1205,8 @@ EXPORT_SYMBOL_GPL(btrtl_initialize);
int btrtl_download_firmware(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev)
{
int err = 0;
/* Match a set of subver values that correspond to stock firmware,
* which is not compatible with standard btusb.
* If matched, upload an alternative firmware that does conform to
@ -1133,12 +1215,14 @@ int btrtl_download_firmware(struct hci_dev *hdev,
*/
if (!btrtl_dev->ic_info) {
rtl_dev_info(hdev, "assuming no firmware upload needed");
return 0;
err = 0;
goto done;
}
switch (btrtl_dev->ic_info->lmp_subver) {
case RTL_ROM_LMP_8723A:
return btrtl_setup_rtl8723a(hdev, btrtl_dev);
err = btrtl_setup_rtl8723a(hdev, btrtl_dev);
break;
case RTL_ROM_LMP_8723B:
case RTL_ROM_LMP_8821A:
case RTL_ROM_LMP_8761A:
@ -1146,11 +1230,18 @@ int btrtl_download_firmware(struct hci_dev *hdev,
case RTL_ROM_LMP_8852A:
case RTL_ROM_LMP_8703B:
case RTL_ROM_LMP_8851B:
return btrtl_setup_rtl8723b(hdev, btrtl_dev);
err = btrtl_setup_rtl8723b(hdev, btrtl_dev);
break;
default:
rtl_dev_info(hdev, "assuming no firmware upload needed");
return 0;
break;
}
done:
if (!err)
err = btrtl_register_devcoredump_support(hdev);
return err;
}
EXPORT_SYMBOL_GPL(btrtl_download_firmware);

13
drivers/bluetooth/btrtl.h
View File

@ -109,8 +109,16 @@ enum {
__REALTEK_NUM_FLAGS,
};
struct rtl_dump_info {
const char *driver_name;
char *controller;
u32 fw_version;
};
struct btrealtek_data {
DECLARE_BITMAP(flags, __REALTEK_NUM_FLAGS);
struct rtl_dump_info rtl_dump;
};
#define btrealtek_set_flag(hdev, nr) \
@ -139,6 +147,7 @@ int btrtl_get_uart_settings(struct hci_dev *hdev,
struct btrtl_device_info *btrtl_dev,
unsigned int *controller_baudrate,
u32 *device_baudrate, bool *flow_control);
void btrtl_set_driver_name(struct hci_dev *hdev, const char *driver_name);
#else
@ -182,4 +191,8 @@ static inline int btrtl_get_uart_settings(struct hci_dev *hdev,
return -ENOENT;
}
static inline void btrtl_set_driver_name(struct hci_dev *hdev, const char *driver_name)
{
}
#endif

74
drivers/bluetooth/btusb.c
View File

@ -887,10 +887,49 @@ static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
gpiod_set_value_cansleep(reset_gpio, 0);
}
#define RTK_DEVCOREDUMP_CODE_MEMDUMP 0x01
#define RTK_DEVCOREDUMP_CODE_HW_ERR 0x02
#define RTK_DEVCOREDUMP_CODE_CMD_TIMEOUT 0x03
#define RTK_SUB_EVENT_CODE_COREDUMP 0x34
struct rtk_dev_coredump_hdr {
u8 type;
u8 code;
u8 reserved[2];
} __packed;
static inline void btusb_rtl_alloc_devcoredump(struct hci_dev *hdev,
struct rtk_dev_coredump_hdr *hdr, u8 *buf, u32 len)
{
struct sk_buff *skb;
skb = alloc_skb(len + sizeof(*hdr), GFP_ATOMIC);
if (!skb)
return;
skb_put_data(skb, hdr, sizeof(*hdr));
if (len)
skb_put_data(skb, buf, len);
if (!hci_devcd_init(hdev, skb->len)) {
hci_devcd_append(hdev, skb);
hci_devcd_complete(hdev);
} else {
bt_dev_err(hdev, "RTL: Failed to generate devcoredump");
kfree_skb(skb);
}
}
static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);
struct gpio_desc *reset_gpio = data->reset_gpio;
struct rtk_dev_coredump_hdr hdr = {
.type = RTK_DEVCOREDUMP_CODE_CMD_TIMEOUT,
};
btusb_rtl_alloc_devcoredump(hdev, &hdr, NULL, 0);
if (++data->cmd_timeout_cnt < 5)
return;
@ -917,6 +956,18 @@ static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
gpiod_set_value_cansleep(reset_gpio, 0);
}
static void btusb_rtl_hw_error(struct hci_dev *hdev, u8 code)
{
struct rtk_dev_coredump_hdr hdr = {
.type = RTK_DEVCOREDUMP_CODE_HW_ERR,
.code = code,
};
bt_dev_err(hdev, "RTL: hw err, trigger devcoredump (%d)", code);
btusb_rtl_alloc_devcoredump(hdev, &hdr, NULL, 0);
}
static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);
@ -2562,6 +2613,25 @@ static int btusb_setup_realtek(struct hci_dev *hdev)
return ret;
}
static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
{
if (skb->data[0] == HCI_VENDOR_PKT && skb->data[2] == RTK_SUB_EVENT_CODE_COREDUMP) {
struct rtk_dev_coredump_hdr hdr = {
.code = RTK_DEVCOREDUMP_CODE_MEMDUMP,
};
bt_dev_dbg(hdev, "RTL: received coredump vendor evt, len %u",
skb->len);
btusb_rtl_alloc_devcoredump(hdev, &hdr, skb->data, skb->len);
kfree_skb(skb);
return 0;
}
return hci_recv_frame(hdev, skb);
}
/* UHW CR mapping */
#define MTK_BT_MISC 0x70002510
#define MTK_BT_SUBSYS_RST 0x70002610
@ -4201,6 +4271,8 @@ static int btusb_probe(struct usb_interface *intf,
} else if (id->driver_info & BTUSB_REALTEK) {
/* Allocate extra space for Realtek device */
priv_size += sizeof(struct btrealtek_data);
data->recv_event = btusb_recv_event_realtek;
}
data->recv_acl = hci_recv_frame;
@ -4364,9 +4436,11 @@ static int btusb_probe(struct usb_interface *intf,
if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
(id->driver_info & BTUSB_REALTEK)) {
btrtl_set_driver_name(hdev, btusb_driver.name);
hdev->setup = btusb_setup_realtek;
hdev->shutdown = btrtl_shutdown_realtek;
hdev->cmd_timeout = btusb_rtl_cmd_timeout;
hdev->hw_error = btusb_rtl_hw_error;
/* Realtek devices need to set remote wakeup on auto-suspend */
set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);