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Bluetooth: Add debugfs fields for hardware and firmware info

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Some Bluetooth controllers allow for reading hardware and firmware
related vendor specific infos. If they are available, then they can be
exposed via debugfs now.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2016-07-17 19:55:16 +02:00 committed by Johan Hedberg
parent f962fe32f2
commit 5177a83827
3 changed files with 63 additions and 0 deletions
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4
include/net/bluetooth/hci_core.h
View file

@ -372,6 +372,8 @@ struct hci_dev {
atomic_t promisc;
const char *hw_info;
const char *fw_info;
struct dentry *debugfs;
struct device dev;
@ -1024,6 +1026,8 @@ int hci_resume_dev(struct hci_dev *hdev);
int hci_reset_dev(struct hci_dev *hdev);
int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
int hci_dev_open(__u16 dev);
int hci_dev_close(__u16 dev);
int hci_dev_do_close(struct hci_dev *hdev);

24
net/bluetooth/hci_core.c
View file

@ -3163,6 +3163,8 @@ void hci_unregister_dev(struct hci_dev *hdev)
device_del(&hdev->dev);
debugfs_remove_recursive(hdev->debugfs);
kfree_const(hdev->hw_info);
kfree_const(hdev->fw_info);
destroy_workqueue(hdev->workqueue);
destroy_workqueue(hdev->req_workqueue);
@ -3266,6 +3268,28 @@ int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
}
EXPORT_SYMBOL(hci_recv_diag);
void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
{
va_list vargs;
va_start(vargs, fmt);
kfree_const(hdev->hw_info);
hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
va_end(vargs);
}
EXPORT_SYMBOL(hci_set_hw_info);
void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
{
va_list vargs;
va_start(vargs, fmt);
kfree_const(hdev->fw_info);
hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
va_end(vargs);
}
EXPORT_SYMBOL(hci_set_fw_info);
/* ---- Interface to upper protocols ---- */
int hci_register_cb(struct hci_cb *cb)

35
net/bluetooth/hci_debugfs.c
View file

@ -76,6 +76,30 @@ static const struct file_operations __name ## _fops = { \
.llseek = default_llseek, \
} \
#define DEFINE_INFO_ATTRIBUTE(__name, __field) \
static int __name ## _show(struct seq_file *f, void *ptr) \
{ \
struct hci_dev *hdev = f->private; \
\
hci_dev_lock(hdev); \
seq_printf(f, "%s\n", hdev->__field ? : ""); \
hci_dev_unlock(hdev); \
\
return 0; \
} \
\
static int __name ## _open(struct inode *inode, struct file *file) \
{ \
return single_open(file, __name ## _show, inode->i_private); \
} \
\
static const struct file_operations __name ## _fops = { \
.open = __name ## _open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
} \
static int features_show(struct seq_file *f, void *ptr)
{
struct hci_dev *hdev = f->private;
@ -349,6 +373,9 @@ static const struct file_operations sc_only_mode_fops = {
.llseek = default_llseek,
};
DEFINE_INFO_ATTRIBUTE(hardware_info, hw_info);
DEFINE_INFO_ATTRIBUTE(firmware_info, fw_info);
void hci_debugfs_create_common(struct hci_dev *hdev)
{
debugfs_create_file("features", 0444, hdev->debugfs, hdev,
@ -382,6 +409,14 @@ void hci_debugfs_create_common(struct hci_dev *hdev)
if (lmp_sc_capable(hdev) || lmp_le_capable(hdev))
debugfs_create_file("sc_only_mode", 0444, hdev->debugfs,
hdev, &sc_only_mode_fops);
if (hdev->hw_info)
debugfs_create_file("hardware_info", 0444, hdev->debugfs,
hdev, &hardware_info_fops);
if (hdev->fw_info)
debugfs_create_file("firmware_info", 0444, hdev->debugfs,
hdev, &firmware_info_fops);
}
static int inquiry_cache_show(struct seq_file *f, void *p)