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.
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/bitops.hlinux/firmware.hlinux/types.hlinux/kref.hlinux/list.hlinux/completion.h
Detected Declarations
struct fw_statestruct fw_privenum fw_optenum fw_statusfunction __fw_state_checkfunction __fw_state_wait_commonfunction __fw_state_setfunction fw_state_abortedfunction fw_state_is_abortedfunction fw_state_startfunction fw_state_donefunction fw_state_is_donefunction fw_state_is_loadingfunction firmware_is_builtinfunction firmware_request_builtin_buffunction fw_free_paged_buffunction fw_map_paged_buffunction fw_is_paged_buf
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
- Immediate include surface: `linux/bitops.h`, `linux/firmware.h`, `linux/types.h`, `linux/kref.h`, `linux/list.h`, `linux/completion.h`.
- Detected declarations: `struct fw_state`, `struct fw_priv`, `enum fw_opt`, `enum fw_status`, `function __fw_state_check`, `function __fw_state_wait_common`, `function __fw_state_set`, `function fw_state_aborted`, `function fw_state_is_aborted`, `function fw_state_start`.
- Atlas domain: Driver Families / drivers/base.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.