drivers/infiniband/hw/hfi1/trace_iowait.h
Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/hfi1/trace_iowait.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/infiniband/hw/hfi1/trace_iowait.h- Extension
.h- Size
- 1462 bytes
- Lines
- 55
- Domain
- Driver Families
- Bucket
- drivers/infiniband
- 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/tracepoint.hiowait.hverbs.htrace/define_trace.h
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
#if !defined(__HFI1_TRACE_IOWAIT_H) || defined(TRACE_HEADER_MULTI_READ)
#define __HFI1_TRACE_IOWAIT_H
#include <linux/tracepoint.h>
#include "iowait.h"
#include "verbs.h"
#undef TRACE_SYSTEM
#define TRACE_SYSTEM hfi1_iowait
DECLARE_EVENT_CLASS(hfi1_iowait_template,
TP_PROTO(struct iowait *wait, u32 flag),
TP_ARGS(wait, flag),
TP_STRUCT__entry(/* entry */
__field(unsigned long, addr)
__field(unsigned long, flags)
__field(u32, flag)
__field(u32, qpn)
),
TP_fast_assign(/* assign */
__entry->addr = (unsigned long)wait;
__entry->flags = wait->flags;
__entry->flag = (1 << flag);
__entry->qpn = iowait_to_qp(wait)->ibqp.qp_num;
),
TP_printk(/* print */
"iowait 0x%lx qp %u flags 0x%lx flag 0x%x",
__entry->addr,
__entry->qpn,
__entry->flags,
__entry->flag
)
);
DEFINE_EVENT(hfi1_iowait_template, hfi1_iowait_set,
TP_PROTO(struct iowait *wait, u32 flag),
TP_ARGS(wait, flag));
DEFINE_EVENT(hfi1_iowait_template, hfi1_iowait_clear,
TP_PROTO(struct iowait *wait, u32 flag),
TP_ARGS(wait, flag));
#endif /* __HFI1_TRACE_IOWAIT_H */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace_iowait
#include <trace/define_trace.h>
Annotation
- Immediate include surface: `linux/tracepoint.h`, `iowait.h`, `verbs.h`, `trace/define_trace.h`.
- Atlas domain: Driver Families / drivers/infiniband.
- 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.