drivers/scsi/arm/msgqueue.h
Source file repositories/reference/linux-study-clean/drivers/scsi/arm/msgqueue.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/scsi/arm/msgqueue.h- Extension
.h- Size
- 2011 bytes
- Lines
- 80
- Domain
- Driver Families
- Bucket
- drivers/scsi
- 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
- No C-style include directives detected by the generator.
Detected Declarations
struct messagestruct msgqueue_entry
Annotated Snippet
struct message {
char msg[8];
int length;
int fifo;
};
struct msgqueue_entry {
struct message msg;
struct msgqueue_entry *next;
};
#define NR_MESSAGES 4
typedef struct {
struct msgqueue_entry *qe;
struct msgqueue_entry *free;
struct msgqueue_entry entries[NR_MESSAGES];
} MsgQueue_t;
/*
* Function: void msgqueue_initialise(MsgQueue_t *msgq)
* Purpose : initialise a message queue
* Params : msgq - queue to initialise
*/
extern void msgqueue_initialise(MsgQueue_t *msgq);
/*
* Function: void msgqueue_free(MsgQueue_t *msgq)
* Purpose : free a queue
* Params : msgq - queue to free
*/
extern void msgqueue_free(MsgQueue_t *msgq);
/*
* Function: int msgqueue_msglength(MsgQueue_t *msgq)
* Purpose : calculate the total length of all messages on the message queue
* Params : msgq - queue to examine
* Returns : number of bytes of messages in queue
*/
extern int msgqueue_msglength(MsgQueue_t *msgq);
/*
* Function: struct message *msgqueue_getmsg(MsgQueue_t *msgq, int msgno)
* Purpose : return a message & its length
* Params : msgq - queue to obtain message from
* : msgno - message number
* Returns : pointer to message string, or NULL
*/
extern struct message *msgqueue_getmsg(MsgQueue_t *msgq, int msgno);
/*
* Function: int msgqueue_addmsg(MsgQueue_t *msgq, int length, ...)
* Purpose : add a message onto a message queue
* Params : msgq - queue to add message on
* length - length of message
* ... - message bytes
* Returns : != 0 if successful
*/
extern int msgqueue_addmsg(MsgQueue_t *msgq, int length, ...);
/*
* Function: void msgqueue_flush(MsgQueue_t *msgq)
* Purpose : flush all messages from message queue
* Params : msgq - queue to flush
*/
extern void msgqueue_flush(MsgQueue_t *msgq);
#endif
Annotation
- Detected declarations: `struct message`, `struct msgqueue_entry`.
- Atlas domain: Driver Families / drivers/scsi.
- 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.