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Bluetooth: btintel_pcie: Add support for device coredump

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1. Driver registers device coredump callback
2. Dumps firmware traces as part of coredump

Co-developed-by: Vijay Satija <vijay.satija@intel.com>
Signed-off-by: Vijay Satija <vijay.satija@intel.com>
Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Kiran K 2025-03-03 22:15:27 +05:30 committed by Luiz Augusto von Dentz
parent 1f04b0e5e3
commit 07e6bddb54
3 changed files with 291 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/bluetooth/btintel.h
View file

@ -190,7 +190,6 @@ enum {
struct btintel_data {
DECLARE_BITMAP(flags, __INTEL_NUM_FLAGS);
int (*acpi_reset_method)(struct hci_dev *hdev);
u32 cnvi_top;
};
#define btintel_set_flag(hdev, nr) \

259
drivers/bluetooth/btintel_pcie.c
View file

@ -59,6 +59,8 @@ MODULE_DEVICE_TABLE(pci, btintel_pcie_table);
#define BTINTEL_PCIE_MAGIC_NUM 0xA5A5A5A5
#define BTINTEL_PCIE_TRIGGER_REASON_USER_TRIGGER 0x17A2
/* Alive interrupt context */
enum {
BTINTEL_PCIE_ROM,
@ -375,6 +377,25 @@ static void btintel_pcie_mac_init(struct btintel_pcie_data *data)
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
}
static int btintel_pcie_add_dmp_data(struct hci_dev *hdev, const void *data, int size)
{
struct sk_buff *skb;
int err;
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
skb_put_data(skb, data, size);
err = hci_devcd_append(hdev, skb);
if (err) {
bt_dev_err(hdev, "Failed to append data in the coredump");
return err;
}
return 0;
}
static int btintel_pcie_get_mac_access(struct btintel_pcie_data *data)
{
u32 reg;
@ -419,6 +440,194 @@ static void btintel_pcie_release_mac_access(struct btintel_pcie_data *data)
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
}
static void btintel_pcie_copy_tlv(struct sk_buff *skb, enum btintel_pcie_tlv_type type,
void *data, int size)
{
struct intel_tlv *tlv;
tlv = skb_put(skb, sizeof(*tlv) + size);
tlv->type = type;
tlv->len = size;
memcpy(tlv->val, data, tlv->len);
}
static int btintel_pcie_read_dram_buffers(struct btintel_pcie_data *data)
{
u32 offset, prev_size, wr_ptr_status, dump_size, i;
struct btintel_pcie_dbgc *dbgc = &data->dbgc;
u8 buf_idx, dump_time_len, fw_build;
struct hci_dev *hdev = data->hdev;
struct intel_tlv *tlv;
struct timespec64 now;
struct sk_buff *skb;
struct tm tm_now;
char buf[256];
u16 hdr_len;
int ret;
wr_ptr_status = btintel_pcie_rd_dev_mem(data, BTINTEL_PCIE_DBGC_CUR_DBGBUFF_STATUS);
offset = wr_ptr_status & BTINTEL_PCIE_DBG_OFFSET_BIT_MASK;
buf_idx = BTINTEL_PCIE_DBGC_DBG_BUF_IDX(wr_ptr_status);
if (buf_idx > dbgc->count) {
bt_dev_warn(hdev, "Buffer index is invalid");
return -EINVAL;
}
prev_size = buf_idx * BTINTEL_PCIE_DBGC_BUFFER_SIZE;
if (prev_size + offset >= prev_size)
data->dmp_hdr.write_ptr = prev_size + offset;
else
return -EINVAL;
ktime_get_real_ts64(&now);
time64_to_tm(now.tv_sec, 0, &tm_now);
dump_time_len = snprintf(buf, sizeof(buf), "Dump Time: %02d-%02d-%04ld %02d:%02d:%02d",
tm_now.tm_mday, tm_now.tm_mon + 1, tm_now.tm_year + 1900,
tm_now.tm_hour, tm_now.tm_min, tm_now.tm_sec);
fw_build = snprintf(buf + dump_time_len, sizeof(buf) - dump_time_len,
"Firmware Timestamp: Year %u WW %02u buildtype %u build %u",
2000 + (data->dmp_hdr.fw_timestamp >> 8),
data->dmp_hdr.fw_timestamp & 0xff, data->dmp_hdr.fw_build_type,
data->dmp_hdr.fw_build_num);
hdr_len = sizeof(*tlv) + sizeof(data->dmp_hdr.cnvi_bt) +
sizeof(*tlv) + sizeof(data->dmp_hdr.write_ptr) +
sizeof(*tlv) + sizeof(data->dmp_hdr.wrap_ctr) +
sizeof(*tlv) + sizeof(data->dmp_hdr.trigger_reason) +
sizeof(*tlv) + sizeof(data->dmp_hdr.fw_git_sha1) +
sizeof(*tlv) + sizeof(data->dmp_hdr.cnvr_top) +
sizeof(*tlv) + sizeof(data->dmp_hdr.cnvi_top) +
sizeof(*tlv) + dump_time_len +
sizeof(*tlv) + fw_build;
dump_size = hdr_len + sizeof(hdr_len);
skb = alloc_skb(dump_size, GFP_KERNEL);
if (!skb)
return -ENOMEM;
/* Add debug buffers data length to dump size */
dump_size += BTINTEL_PCIE_DBGC_BUFFER_SIZE * dbgc->count;
ret = hci_devcd_init(hdev, dump_size);
if (ret) {
bt_dev_err(hdev, "Failed to init devcoredump, err %d", ret);
kfree_skb(skb);
return ret;
}
skb_put_data(skb, &hdr_len, sizeof(hdr_len));
btintel_pcie_copy_tlv(skb, BTINTEL_CNVI_BT, &data->dmp_hdr.cnvi_bt,
sizeof(data->dmp_hdr.cnvi_bt));
btintel_pcie_copy_tlv(skb, BTINTEL_WRITE_PTR, &data->dmp_hdr.write_ptr,
sizeof(data->dmp_hdr.write_ptr));
data->dmp_hdr.wrap_ctr = btintel_pcie_rd_dev_mem(data,
BTINTEL_PCIE_DBGC_DBGBUFF_WRAP_ARND);
btintel_pcie_copy_tlv(skb, BTINTEL_WRAP_CTR, &data->dmp_hdr.wrap_ctr,
sizeof(data->dmp_hdr.wrap_ctr));
btintel_pcie_copy_tlv(skb, BTINTEL_TRIGGER_REASON, &data->dmp_hdr.trigger_reason,
sizeof(data->dmp_hdr.trigger_reason));
btintel_pcie_copy_tlv(skb, BTINTEL_FW_SHA, &data->dmp_hdr.fw_git_sha1,
sizeof(data->dmp_hdr.fw_git_sha1));
btintel_pcie_copy_tlv(skb, BTINTEL_CNVR_TOP, &data->dmp_hdr.cnvr_top,
sizeof(data->dmp_hdr.cnvr_top));
btintel_pcie_copy_tlv(skb, BTINTEL_CNVI_TOP, &data->dmp_hdr.cnvi_top,
sizeof(data->dmp_hdr.cnvi_top));
btintel_pcie_copy_tlv(skb, BTINTEL_DUMP_TIME, buf, dump_time_len);
btintel_pcie_copy_tlv(skb, BTINTEL_FW_BUILD, buf + dump_time_len, fw_build);
ret = hci_devcd_append(hdev, skb);
if (ret)
goto exit_err;
for (i = 0; i < dbgc->count; i++) {
ret = btintel_pcie_add_dmp_data(hdev, dbgc->bufs[i].data,
BTINTEL_PCIE_DBGC_BUFFER_SIZE);
if (ret)
break;
}
exit_err:
hci_devcd_complete(hdev);
return ret;
}
static void btintel_pcie_dump_traces(struct hci_dev *hdev)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
int ret = 0;
ret = btintel_pcie_get_mac_access(data);
if (ret) {
bt_dev_err(hdev, "Failed to get mac access: (%d)", ret);
return;
}
ret = btintel_pcie_read_dram_buffers(data);
btintel_pcie_release_mac_access(data);
if (ret)
bt_dev_err(hdev, "Failed to dump traces: (%d)", ret);
}
static void btintel_pcie_dump_hdr(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
u16 len = skb->len;
u16 *hdrlen_ptr;
char buf[80];
hdrlen_ptr = skb_put_zero(skb, sizeof(len));
snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n",
INTEL_HW_VARIANT(data->dmp_hdr.cnvi_bt));
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Firmware Build Number: %u\n",
data->dmp_hdr.fw_build_num);
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Driver: %s\n", data->dmp_hdr.driver_name);
skb_put_data(skb, buf, strlen(buf));
snprintf(buf, sizeof(buf), "Vendor: Intel\n");
skb_put_data(skb, buf, strlen(buf));
*hdrlen_ptr = skb->len - len;
}
static void btintel_pcie_dump_notify(struct hci_dev *hdev, int state)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
switch (state) {
case HCI_DEVCOREDUMP_IDLE:
data->dmp_hdr.state = HCI_DEVCOREDUMP_IDLE;
break;
case HCI_DEVCOREDUMP_ACTIVE:
data->dmp_hdr.state = HCI_DEVCOREDUMP_ACTIVE;
break;
case HCI_DEVCOREDUMP_TIMEOUT:
case HCI_DEVCOREDUMP_ABORT:
case HCI_DEVCOREDUMP_DONE:
data->dmp_hdr.state = HCI_DEVCOREDUMP_IDLE;
break;
}
}
/* This function enables BT function by setting BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_INIT bit in
* BTINTEL_PCIE_CSR_FUNC_CTRL_REG register and wait for MSI-X with
* BTINTEL_PCIE_MSIX_HW_INT_CAUSES_GP0.
@ -883,7 +1092,6 @@ static int btintel_pcie_recv_frame(struct btintel_pcie_data *data,
static void btintel_pcie_read_hwexp(struct btintel_pcie_data *data)
{
struct btintel_data *intel_data = hci_get_priv(data->hdev);
int len, err, offset, pending;
struct sk_buff *skb;
u8 *buf, prefix[64];
@ -898,11 +1106,11 @@ static void btintel_pcie_read_hwexp(struct btintel_pcie_data *data)
struct tlv *tlv;
switch (intel_data->cnvi_top & 0xfff) {
switch (data->dmp_hdr.cnvi_top & 0xfff) {
case BTINTEL_CNVI_BLAZARI:
case BTINTEL_CNVI_BLAZARIW:
/* only from step B0 onwards */
if (INTEL_CNVX_TOP_STEP(intel_data->cnvi_top) != 0x01)
if (INTEL_CNVX_TOP_STEP(data->dmp_hdr.cnvi_top) != 0x01)
return;
len = BTINTEL_PCIE_BLZR_HWEXP_SIZE; /* exception data length */
addr = BTINTEL_PCIE_BLZR_HWEXP_DMP_ADDR;
@ -912,7 +1120,7 @@ static void btintel_pcie_read_hwexp(struct btintel_pcie_data *data)
addr = BTINTEL_PCIE_SCP_HWEXP_DMP_ADDR;
break;
default:
bt_dev_err(data->hdev, "Unsupported cnvi 0x%8.8x", intel_data->cnvi_top);
bt_dev_err(data->hdev, "Unsupported cnvi 0x%8.8x", data->dmp_hdr.cnvi_top);
return;
}
@ -1017,6 +1225,11 @@ static void btintel_pcie_rx_work(struct work_struct *work)
clear_bit(BTINTEL_PCIE_HWEXP_INPROGRESS, &data->flags);
}
if (test_bit(BTINTEL_PCIE_COREDUMP_INPROGRESS, &data->flags)) {
btintel_pcie_dump_traces(data->hdev);
clear_bit(BTINTEL_PCIE_COREDUMP_INPROGRESS, &data->flags);
}
/* Process the sk_buf in queue and send to the HCI layer */
while ((skb = skb_dequeue(&data->rx_skb_q))) {
err = btintel_pcie_recv_frame(data, skb);
@ -1702,7 +1915,7 @@ static void btintel_pcie_release_hdev(struct btintel_pcie_data *data)
static int btintel_pcie_setup_internal(struct hci_dev *hdev)
{
struct btintel_data *data = hci_get_priv(hdev);
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
const u8 param[1] = { 0xFF };
struct intel_version_tlv ver_tlv;
struct sk_buff *skb;
@ -1741,7 +1954,6 @@ static int btintel_pcie_setup_internal(struct hci_dev *hdev)
goto exit_error;
}
data->cnvi_top = ver_tlv.cnvi_top;
switch (INTEL_HW_PLATFORM(ver_tlv.cnvi_bt)) {
case 0x37:
break;
@ -1787,6 +1999,23 @@ static int btintel_pcie_setup_internal(struct hci_dev *hdev)
break;
}
data->dmp_hdr.cnvi_top = ver_tlv.cnvi_top;
data->dmp_hdr.cnvr_top = ver_tlv.cnvr_top;
data->dmp_hdr.fw_timestamp = ver_tlv.timestamp;
data->dmp_hdr.fw_build_type = ver_tlv.build_type;
data->dmp_hdr.fw_build_num = ver_tlv.build_num;
data->dmp_hdr.cnvi_bt = ver_tlv.cnvi_bt;
if (ver_tlv.img_type == 0x02 || ver_tlv.img_type == 0x03)
data->dmp_hdr.fw_git_sha1 = ver_tlv.git_sha1;
err = hci_devcd_register(hdev, btintel_pcie_dump_traces, btintel_pcie_dump_hdr,
btintel_pcie_dump_notify);
if (err) {
bt_dev_err(hdev, "Failed to register coredump (%d)", err);
goto exit_error;
}
btintel_print_fseq_info(hdev);
exit_error:
kfree_skb(skb);
@ -1851,6 +2080,7 @@ static int btintel_pcie_setup_hdev(struct btintel_pcie_data *data)
goto exit_error;
}
data->dmp_hdr.driver_name = KBUILD_MODNAME;
return 0;
exit_error:
@ -1963,11 +2193,28 @@ static void btintel_pcie_remove(struct pci_dev *pdev)
pci_set_drvdata(pdev, NULL);
}
#ifdef CONFIG_DEV_COREDUMP
static void btintel_pcie_coredump(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct btintel_pcie_data *data = pci_get_drvdata(pdev);
if (test_and_set_bit(BTINTEL_PCIE_COREDUMP_INPROGRESS, &data->flags))
return;
data->dmp_hdr.trigger_reason = BTINTEL_PCIE_TRIGGER_REASON_USER_TRIGGER;
queue_work(data->workqueue, &data->rx_work);
}
#endif
static struct pci_driver btintel_pcie_driver = {
.name = KBUILD_MODNAME,
.id_table = btintel_pcie_table,
.probe = btintel_pcie_probe,
.remove = btintel_pcie_remove,
#ifdef CONFIG_DEV_COREDUMP
.driver.coredump = btintel_pcie_coredump
#endif
};
module_pci_driver(btintel_pcie_driver);

38
drivers/bluetooth/btintel_pcie.h
View file

@ -56,6 +56,15 @@
#define BTINTEL_PCIE_CSR_MSIX_IVAR_BASE (BTINTEL_PCIE_CSR_MSIX_BASE + 0x0880)
#define BTINTEL_PCIE_CSR_MSIX_IVAR(cause) (BTINTEL_PCIE_CSR_MSIX_IVAR_BASE + (cause))
/* IOSF Debug Register */
#define BTINTEL_PCIE_DBGC_BASE_ADDR (0xf3800300)
#define BTINTEL_PCIE_DBGC_CUR_DBGBUFF_STATUS (BTINTEL_PCIE_DBGC_BASE_ADDR + 0x1C)
#define BTINTEL_PCIE_DBGC_DBGBUFF_WRAP_ARND (BTINTEL_PCIE_DBGC_BASE_ADDR + 0x2C)
#define BTINTEL_PCIE_DBG_IDX_BIT_MASK 0x0F
#define BTINTEL_PCIE_DBGC_DBG_BUF_IDX(data) (((data) >> 24) & BTINTEL_PCIE_DBG_IDX_BIT_MASK)
#define BTINTEL_PCIE_DBG_OFFSET_BIT_MASK 0xFFFFFF
/* The DRAM buffer count, each buffer size, and
* fragment buffer size
*/
@ -97,6 +106,19 @@ enum {
enum {
BTINTEL_PCIE_CORE_HALTED,
BTINTEL_PCIE_HWEXP_INPROGRESS,
BTINTEL_PCIE_COREDUMP_INPROGRESS
};
enum btintel_pcie_tlv_type {
BTINTEL_CNVI_BT,
BTINTEL_WRITE_PTR,
BTINTEL_WRAP_CTR,
BTINTEL_TRIGGER_REASON,
BTINTEL_FW_SHA,
BTINTEL_CNVR_TOP,
BTINTEL_CNVI_TOP,
BTINTEL_DUMP_TIME,
BTINTEL_FW_BUILD,
};
#define BTINTEL_PCIE_MSIX_NON_AUTO_CLEAR_CAUSE BIT(7)
@ -371,6 +393,21 @@ struct btintel_pcie_dbgc {
struct data_buf *bufs;
};
struct btintel_pcie_dump_header {
const char *driver_name;
u32 cnvi_top;
u32 cnvr_top;
u16 fw_timestamp;
u8 fw_build_type;
u32 fw_build_num;
u32 fw_git_sha1;
u32 cnvi_bt;
u32 write_ptr;
u32 wrap_ctr;
u16 trigger_reason;
int state;
};
/* struct btintel_pcie_data
* @pdev: pci device
* @hdev: hdev device
@ -452,6 +489,7 @@ struct btintel_pcie_data {
struct rxq rxq;
u32 alive_intr_ctxt;
struct btintel_pcie_dbgc dbgc;
struct btintel_pcie_dump_header dmp_hdr;
};
static inline u32 btintel_pcie_rd_reg32(struct btintel_pcie_data *data,