[v1,1/1] Bluetooth: btnxpuart: Add handling for boot-signature timeout errors

Commit Message

Neeraj Sanjay Kale March 14, 2024, 12:29 p.m. UTC

From: Neeraj Sanjay Kale <[e-mail]>

This handles the timeout errors seen in the bootloader signatures during
FW download.

When the bootloader does not receive a response packet from the host
within a specific time, it adds an error code to the bootloader
signature while requesting for the FW chunk from the same offset.

The host is expected to clear this error code with a NAK, and reply to
only those bootloader signatures which have error code 0.

This error handling is valid for data_req bootloader signatures for V3
and future bootloader versions.

Signed-off-by: Neeraj Sanjay Kale <[e-mail]>
---
 drivers/bluetooth/btnxpuart.c | 46 ++++++++++++++++++++++++++++++++---
 1 file changed, 42 insertions(+), 4 deletions(-)

Comments

[e-mail] March 14, 2024, 1:08 p.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=835311

---Test result---

Test Summary:
CheckPatch                    PASS      0.69 seconds
GitLint                       PASS      0.32 seconds
SubjectPrefix                 PASS      0.12 seconds
BuildKernel                   PASS      28.19 seconds
CheckAllWarning               PASS      30.79 seconds
CheckSparse                   PASS      36.74 seconds
CheckSmatch                   PASS      99.34 seconds
BuildKernel32                 PASS      27.54 seconds
TestRunnerSetup               PASS      513.49 seconds
TestRunner_l2cap-tester       PASS      20.10 seconds
TestRunner_iso-tester         FAIL      30.73 seconds
TestRunner_bnep-tester        PASS      4.84 seconds
TestRunner_mgmt-tester        PASS      108.19 seconds
TestRunner_rfcomm-tester      PASS      8.62 seconds
TestRunner_sco-tester         PASS      15.01 seconds
TestRunner_ioctl-tester       PASS      7.88 seconds
TestRunner_mesh-tester        PASS      5.88 seconds
TestRunner_smp-tester         PASS      6.89 seconds
TestRunner_userchan-tester    PASS      4.96 seconds
IncrementalBuild              PASS      26.55 seconds

Details
##############################
Test: TestRunner_iso-tester - FAIL
Desc: Run iso-tester with test-runner
Output:
Total: 117, Passed: 116 (99.1%), Failed: 1, Not Run: 0

Failed Test Cases
ISO Connect2 Suspend - Success                       Failed       4.208 seconds


---
Regards,
Linux Bluetooth

Patch

diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c
index 0b93c2ff29e4..2018513fb961 100644
--- a/drivers/bluetooth/btnxpuart.c
+++ b/drivers/bluetooth/btnxpuart.c
@@ -187,6 +187,10 @@  struct btnxpuart_dev {
 #define NXP_NAK_V3		0x7b
 #define NXP_CRC_ERROR_V3	0x7c
 
+#define NXP_ACK_RX_TIMEOUT	0x0002
+#define NXP_HDR_RX_TIMEOUT	0x0003
+#define NXP_DATA_RX_TIMEOUT	0x0004
+
 #define HDR_LEN			16
 
 #define NXP_RECV_CHIP_VER_V1 \
@@ -277,6 +281,12 @@  struct nxp_bootloader_cmd {
 	__be32 crc;
 } __packed;
 
+struct nxp_v3_rx_timeout_nak {
+	u8 nak;
+	__le32 offset;
+	u8 crc;
+} __packed;
+
 static u8 crc8_table[CRC8_TABLE_SIZE];
 
 /* Default configurations */
@@ -899,6 +909,32 @@  static int nxp_recv_chip_ver_v3(struct hci_dev *hdev, struct sk_buff *skb)
 	return 0;
 }
 
+static void nxp_handle_fw_dnld_error(struct hci_dev *hdev, struct v3_data_req *req)
+{
+	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
+	__u32 offset = __le32_to_cpu(req->offset);
+	__u16 err = __le16_to_cpu(req->error);
+	struct nxp_v3_rx_timeout_nak nak_tx_buf;
+
+	switch (err) {
+	case NXP_ACK_RX_TIMEOUT:
+	case NXP_HDR_RX_TIMEOUT:
+	case NXP_DATA_RX_TIMEOUT:
+		nak_tx_buf.nak = NXP_NAK_V3;
+		nak_tx_buf.offset = __cpu_to_le32(offset);
+		nak_tx_buf.crc = crc8(crc8_table, (u8 *)&nak_tx_buf,
+				      sizeof(nak_tx_buf) - 1, 0xff);
+		serdev_device_write_buf(nxpdev->serdev, (u8 *)&nak_tx_buf,
+					sizeof(nak_tx_buf));
+		break;
+	default:
+		bt_dev_dbg(hdev, "Unknown bootloader error: %d", err);
+		break;
+
+	}
+
+}
+
 static int nxp_recv_fw_req_v3(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
@@ -913,7 +949,12 @@  static int nxp_recv_fw_req_v3(struct hci_dev *hdev, struct sk_buff *skb)
 	if (!req || !nxpdev->fw)
 		goto free_skb;
 
-	nxp_send_ack(NXP_ACK_V3, hdev);
+	if (!req->error) {
+		nxp_send_ack(NXP_ACK_V3, hdev);
+	} else {
+		nxp_handle_fw_dnld_error(hdev, req);
+		goto free_skb;
+	}
 
 	len = __le16_to_cpu(req->len);
 
@@ -940,9 +981,6 @@  static int nxp_recv_fw_req_v3(struct hci_dev *hdev, struct sk_buff *skb)
 		wake_up_interruptible(&nxpdev->fw_dnld_done_wait_q);
 		goto free_skb;
 	}
-	if (req->error)
-		bt_dev_dbg(hdev, "FW Download received err 0x%02x from chip",
-			   req->error);
 
 	offset = __le32_to_cpu(req->offset);
 	if (offset < nxpdev->fw_v3_offset_correction) {