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[v4] Bluetooth: btrtl: Add Realtek devcoredump support

Message ID 20230427032755.28519-1-hildawu@realtek.com (mailing list archive)
State Accepted
Commit ab93c2a3445889c311a40a82601cf304869a893b
Headers show
Series [v4] Bluetooth: btrtl: Add Realtek devcoredump support | expand

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Context Check Description
tedd_an/pre-ci_am success Success
tedd_an/CheckPatch success CheckPatch PASS
tedd_an/GitLint success Gitlint PASS
tedd_an/SubjectPrefix success Gitlint PASS
tedd_an/BuildKernel success BuildKernel PASS
tedd_an/CheckAllWarning success CheckAllWarning PASS
tedd_an/CheckSparse success CheckSparse PASS
tedd_an/CheckSmatch success CheckSparse PASS
tedd_an/BuildKernel32 success BuildKernel32 PASS
tedd_an/TestRunnerSetup success TestRunnerSetup PASS
tedd_an/TestRunner_l2cap-tester success TestRunner PASS
tedd_an/TestRunner_iso-tester success TestRunner PASS
tedd_an/TestRunner_bnep-tester success TestRunner PASS
tedd_an/TestRunner_mgmt-tester success TestRunner PASS
tedd_an/TestRunner_rfcomm-tester success TestRunner PASS
tedd_an/TestRunner_sco-tester success TestRunner PASS
tedd_an/TestRunner_ioctl-tester success TestRunner PASS
tedd_an/TestRunner_mesh-tester success TestRunner PASS
tedd_an/TestRunner_smp-tester success TestRunner PASS
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tedd_an/IncrementalBuild success Incremental Build PASS

Commit Message

Hilda Wu April 27, 2023, 3:27 a.m. UTC 
From: Hilda Wu <hildawu@realtek.com>

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>
---
Changes in v4:
 - Adjust coredump_info stored on a per hdev basis.
 - Adjust message level.

Changes in v3:
 - Rebase, fixed merge confilt

Changes in v2:
 - According to devcoredump API revision, modified related part.
---
---
 drivers/bluetooth/btrtl.c | 145 +++++++++++++++++++++++++++++++-------
 drivers/bluetooth/btrtl.h |  13 ++++
 drivers/bluetooth/btusb.c |  74 +++++++++++++++++++
 3 files changed, 205 insertions(+), 27 deletions(-)

Comments

bluez.test.bot@gmail.com April 27, 2023, 4 a.m. UTC | #1 
This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=743500

---Test result---

Test Summary:
CheckPatch                    PASS      1.33 seconds
GitLint                       PASS      0.26 seconds
SubjectPrefix                 PASS      0.07 seconds
BuildKernel                   PASS      38.75 seconds
CheckAllWarning               PASS      42.89 seconds
CheckSparse                   PASS      48.71 seconds
CheckSmatch                   PASS      130.61 seconds
BuildKernel32                 PASS      38.04 seconds
TestRunnerSetup               PASS      535.77 seconds
TestRunner_l2cap-tester       PASS      19.81 seconds
TestRunner_iso-tester         PASS      26.14 seconds
TestRunner_bnep-tester        PASS      6.99 seconds
TestRunner_mgmt-tester        PASS      133.64 seconds
TestRunner_rfcomm-tester      PASS      10.69 seconds
TestRunner_sco-tester         PASS      9.98 seconds
TestRunner_ioctl-tester       PASS      11.71 seconds
TestRunner_mesh-tester        PASS      8.60 seconds
TestRunner_smp-tester         PASS      9.86 seconds
TestRunner_userchan-tester    PASS      7.12 seconds
IncrementalBuild              PASS      36.71 seconds



---
Regards,
Linux Bluetooth
Hilda Wu May 22, 2023, 6:02 a.m. UTC | #2 
Hi Marcel, Johan, Luiz, and Maintainers,

Friendly ping, we are waiting for a maintainer review.
If you have any suggestions, please let us know.
Thank you for your help and your time.

Regards,
Hilda

-----Original Message-----
From: Hilda Wu <hildawu@realtek.com> 
Sent: Thursday, April 27, 2023 11:28 AM
To: marcel@holtmann.org
Cc: johan.hedberg@gmail.com; luiz.dentz@gmail.com; linux-bluetooth@vger.kernel.org; linux-kernel@vger.kernel.org; mmandlik@google.com; apusaka@chromium.org; yinghsu@chromium.org; alex_lu@realsil.com.cn; Max Chou <max.chou@realtek.com>; KidmanLee <kidman@realtek.com>
Subject: [PATCH v4] Bluetooth: btrtl: Add Realtek devcoredump support

From: Hilda Wu <hildawu@realtek.com>

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>
---
Changes in v4:
 - Adjust coredump_info stored on a per hdev basis.
 - Adjust message level.

Changes in v3:
 - Rebase, fixed merge confilt

Changes in v2:
 - According to devcoredump API revision, modified related part.
---
---
 drivers/bluetooth/btrtl.c | 145 +++++++++++++++++++++++++++++++-------
 drivers/bluetooth/btrtl.h |  13 ++++
 drivers/bluetooth/btusb.c |  74 +++++++++++++++++++
 3 files changed, 205 insertions(+), 27 deletions(-)

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c index 2915c82d719d..3a1abd8fad60 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -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 @@ static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
 	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 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
 	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);
 
diff --git a/drivers/bluetooth/btrtl.h b/drivers/bluetooth/btrtl.h index adb4c2c9abc5..a2d9d34f9fb0 100644
--- a/drivers/bluetooth/btrtl.h
+++ b/drivers/bluetooth/btrtl.h
@@ -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
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 3aa189b1986d..23059e3463eb 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -869,10 +869,49 @@ 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;
@@ -899,6 +938,18 @@ 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); @@ -2539,6 +2590,25 @@ 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
@@ -3978,6 +4048,8 @@ 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;
@@ -4136,9 +4208,11 @@ 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);
--
2.17.1
patchwork-bot+bluetooth@kernel.org May 23, 2023, 5:40 p.m. UTC | #3 
Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Thu, 27 Apr 2023 11:27:55 +0800 you wrote:
> From: Hilda Wu <hildawu@realtek.com>
> 
> 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>
> 
> [...]

Here is the summary with links:
  - [v4] Bluetooth: btrtl: Add Realtek devcoredump support
    https://git.kernel.org/bluetooth/bluetooth-next/c/ab93c2a34458

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 2915c82d719d..3a1abd8fad60 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -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 @@  static int btrtl_setup_rtl8723b(struct hci_dev *hdev,
 	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 @@  struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
 	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);
 
diff --git a/drivers/bluetooth/btrtl.h b/drivers/bluetooth/btrtl.h
index adb4c2c9abc5..a2d9d34f9fb0 100644
--- a/drivers/bluetooth/btrtl.h
+++ b/drivers/bluetooth/btrtl.h
@@ -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
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 3aa189b1986d..23059e3463eb 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -869,10 +869,49 @@  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;
@@ -899,6 +938,18 @@  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);
@@ -2539,6 +2590,25 @@  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
@@ -3978,6 +4048,8 @@  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;
@@ -4136,9 +4208,11 @@  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);