drivers/iommu/intel/trace.h
Source file repositories/reference/linux-study-clean/drivers/iommu/intel/trace.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/iommu/intel/trace.h- Extension
.h- Size
- 4997 bytes
- Lines
- 190
- Domain
- Driver Families
- Bucket
- drivers/iommu
- 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.hiommu.htrace/define_trace.h
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
#undef TRACE_SYSTEM
#define TRACE_SYSTEM intel_iommu
#if !defined(_TRACE_INTEL_IOMMU_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_INTEL_IOMMU_H
#include <linux/tracepoint.h>
#include "iommu.h"
#define MSG_MAX 256
TRACE_EVENT(qi_submit,
TP_PROTO(struct intel_iommu *iommu, u64 qw0, u64 qw1, u64 qw2, u64 qw3),
TP_ARGS(iommu, qw0, qw1, qw2, qw3),
TP_STRUCT__entry(
__field(u64, qw0)
__field(u64, qw1)
__field(u64, qw2)
__field(u64, qw3)
__string(iommu, iommu->name)
),
TP_fast_assign(
__assign_str(iommu);
__entry->qw0 = qw0;
__entry->qw1 = qw1;
__entry->qw2 = qw2;
__entry->qw3 = qw3;
),
TP_printk("%s %s: 0x%llx 0x%llx 0x%llx 0x%llx",
__print_symbolic(__entry->qw0 & 0xf,
{ QI_CC_TYPE, "cc_inv" },
{ QI_IOTLB_TYPE, "iotlb_inv" },
{ QI_DIOTLB_TYPE, "dev_tlb_inv" },
{ QI_IEC_TYPE, "iec_inv" },
{ QI_IWD_TYPE, "inv_wait" },
{ QI_EIOTLB_TYPE, "p_iotlb_inv" },
{ QI_PC_TYPE, "pc_inv" },
{ QI_DEIOTLB_TYPE, "p_dev_tlb_inv" },
{ QI_PGRP_RESP_TYPE, "page_grp_resp" }),
__get_str(iommu),
__entry->qw0, __entry->qw1, __entry->qw2, __entry->qw3
)
);
TRACE_EVENT(prq_report,
TP_PROTO(struct intel_iommu *iommu, struct device *dev,
u64 dw0, u64 dw1, u64 dw2, u64 dw3,
unsigned long seq),
TP_ARGS(iommu, dev, dw0, dw1, dw2, dw3, seq),
TP_STRUCT__entry(
__field(u64, dw0)
__field(u64, dw1)
__field(u64, dw2)
__field(u64, dw3)
__field(unsigned long, seq)
__string(iommu, iommu->name)
__string(dev, dev_name(dev))
__dynamic_array(char, buff, MSG_MAX)
),
TP_fast_assign(
__entry->dw0 = dw0;
__entry->dw1 = dw1;
__entry->dw2 = dw2;
__entry->dw3 = dw3;
__entry->seq = seq;
__assign_str(iommu);
__assign_str(dev);
),
TP_printk("%s/%s seq# %ld: %s",
__get_str(iommu), __get_str(dev), __entry->seq,
decode_prq_descriptor(__get_str(buff), MSG_MAX, __entry->dw0,
__entry->dw1, __entry->dw2, __entry->dw3)
)
);
DECLARE_EVENT_CLASS(cache_tag_log,
TP_PROTO(struct cache_tag *tag),
TP_ARGS(tag),
TP_STRUCT__entry(
__string(iommu, tag->iommu->name)
__string(dev, dev_name(tag->dev))
Annotation
- Immediate include surface: `linux/tracepoint.h`, `iommu.h`, `trace/define_trace.h`.
- Atlas domain: Driver Families / drivers/iommu.
- 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.