drivers/base/firmware_loader/firmware.h

Source file repositories/reference/linux-study-clean/drivers/base/firmware_loader/firmware.h

File Facts

System
Linux kernel
Corpus path
drivers/base/firmware_loader/firmware.h
Extension
.h
Size
5787 bytes
Lines
199
Domain
Driver Families
Bucket
drivers/base
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct fw_state {
	struct completion completion;
	enum fw_status status;
};

struct fw_priv {
	struct kref ref;
	struct list_head list;
	struct firmware_cache *fwc;
	struct fw_state fw_st;
	void *data;
	size_t size;
	size_t allocated_size;
	size_t offset;
	u32 opt_flags;
#ifdef CONFIG_FW_LOADER_PAGED_BUF
	bool is_paged_buf;
	struct page **pages;
	int nr_pages;
	int page_array_size;
#endif
#ifdef CONFIG_FW_LOADER_USER_HELPER
	bool need_uevent;
	struct list_head pending_list;
#endif
	const char *fw_name;
};

extern struct mutex fw_lock;
extern struct firmware_cache fw_cache;
extern bool fw_load_abort_all;

static inline bool __fw_state_check(struct fw_priv *fw_priv,
				    enum fw_status status)
{
	struct fw_state *fw_st = &fw_priv->fw_st;

	return fw_st->status == status;
}

static inline int __fw_state_wait_common(struct fw_priv *fw_priv, long timeout)
{
	struct fw_state *fw_st = &fw_priv->fw_st;
	long ret;

	ret = wait_for_completion_killable_timeout(&fw_st->completion, timeout);
	if (ret != 0 && fw_st->status == FW_STATUS_ABORTED)
		return -ENOENT;
	if (!ret)
		return -ETIMEDOUT;

	return ret < 0 ? ret : 0;
}

static inline void __fw_state_set(struct fw_priv *fw_priv,
				  enum fw_status status)
{
	struct fw_state *fw_st = &fw_priv->fw_st;

	WRITE_ONCE(fw_st->status, status);

	if (status == FW_STATUS_DONE || status == FW_STATUS_ABORTED) {
#ifdef CONFIG_FW_LOADER_USER_HELPER
		/*
		 * Doing this here ensures that the fw_priv is deleted from
		 * the pending list in all abort/done paths.
		 */
		list_del_init(&fw_priv->pending_list);
#endif
		complete_all(&fw_st->completion);
	}
}

static inline void fw_state_aborted(struct fw_priv *fw_priv)
{
	__fw_state_set(fw_priv, FW_STATUS_ABORTED);
}

static inline bool fw_state_is_aborted(struct fw_priv *fw_priv)
{
	return __fw_state_check(fw_priv, FW_STATUS_ABORTED);
}

static inline void fw_state_start(struct fw_priv *fw_priv)
{
	__fw_state_set(fw_priv, FW_STATUS_LOADING);
}

static inline void fw_state_done(struct fw_priv *fw_priv)
{

Annotation

Implementation Notes