drivers/gpu/drm/i915/i915_perf.h
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/i915_perf.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/i915/i915_perf.h- Extension
.h- Size
- 1670 bytes
- Lines
- 63
- Domain
- Driver Families
- Bucket
- drivers/gpu
- 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/kref.hlinux/types.hi915_perf_types.h
Detected Declarations
struct drm_devicestruct drm_filestruct drm_i915_privatestruct i915_oa_configstruct intel_contextstruct intel_engine_csfunction i915_oa_config_getfunction i915_oa_config_put
Annotated Snippet
#ifndef __I915_PERF_H__
#define __I915_PERF_H__
#include <linux/kref.h>
#include <linux/types.h>
#include "i915_perf_types.h"
struct drm_device;
struct drm_file;
struct drm_i915_private;
struct i915_oa_config;
struct intel_context;
struct intel_engine_cs;
int i915_perf_init(struct drm_i915_private *i915);
void i915_perf_fini(struct drm_i915_private *i915);
void i915_perf_register(struct drm_i915_private *i915);
void i915_perf_unregister(struct drm_i915_private *i915);
int i915_perf_ioctl_version(struct drm_i915_private *i915);
int i915_perf_sysctl_register(void);
void i915_perf_sysctl_unregister(void);
int i915_perf_open_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
int i915_perf_add_config_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
int i915_perf_remove_config_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
void i915_oa_init_reg_state(const struct intel_context *ce,
const struct intel_engine_cs *engine);
struct i915_oa_config *
i915_perf_get_oa_config(struct i915_perf *perf, int metrics_set);
static inline struct i915_oa_config *
i915_oa_config_get(struct i915_oa_config *oa_config)
{
if (kref_get_unless_zero(&oa_config->ref))
return oa_config;
else
return NULL;
}
void i915_oa_config_release(struct kref *ref);
static inline void i915_oa_config_put(struct i915_oa_config *oa_config)
{
if (!oa_config)
return;
kref_put(&oa_config->ref, i915_oa_config_release);
}
u32 i915_perf_oa_timestamp_frequency(struct drm_i915_private *i915);
#endif /* __I915_PERF_H__ */
Annotation
- Immediate include surface: `linux/kref.h`, `linux/types.h`, `i915_perf_types.h`.
- Detected declarations: `struct drm_device`, `struct drm_file`, `struct drm_i915_private`, `struct i915_oa_config`, `struct intel_context`, `struct intel_engine_cs`, `function i915_oa_config_get`, `function i915_oa_config_put`.
- Atlas domain: Driver Families / drivers/gpu.
- 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.