[Intel-gfx] [PATCH 1/2] drm/i915/perf: Register sysctl path globally
Venkata Sandeep Dhanalakota
venkata.s.dhanalakota at intel.com
Fri Dec 13 15:51:51 UTC 2019
We do not require to register the sysctl paths per instance,
so making registration global.
v2: make sysctl path register and unregister function driver
specific (Tvrtko and Lucas).
Cc: Sudeep Dutt <sudeep.dutt at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota at intel.com>
---
drivers/gpu/drm/i915/i915_pci.c | 9 ++++++++-
drivers/gpu/drm/i915/i915_perf.c | 18 ++++++++++++++----
drivers/gpu/drm/i915/i915_perf.h | 2 ++
drivers/gpu/drm/i915/i915_perf_types.h | 1 -
4 files changed, 24 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index bba6b50e6beb..4b33128070da 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -30,6 +30,7 @@
#include "display/intel_fbdev.h"
#include "i915_drv.h"
+#include "i915_perf.h"
#include "i915_globals.h"
#include "i915_selftest.h"
@@ -1051,7 +1052,12 @@ static int __init i915_init(void)
return 0;
}
- return pci_register_driver(&i915_pci_driver);
+ err = pci_register_driver(&i915_pci_driver);
+ if (err)
+ return err;
+
+ i915_perf_sysctl_register();
+ return 0;
}
static void __exit i915_exit(void)
@@ -1059,6 +1065,7 @@ static void __exit i915_exit(void)
if (!i915_pci_driver.driver.owner)
return;
+ i915_perf_sysctl_unregister();
pci_unregister_driver(&i915_pci_driver);
i915_globals_exit();
}
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 8d2e37949f46..4abd7623ef2d 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -387,6 +387,8 @@ struct i915_oa_config_bo {
struct i915_vma *vma;
};
+static struct ctl_table_header *sysctl_header;
+
static enum hrtimer_restart oa_poll_check_timer_cb(struct hrtimer *hrtimer);
void i915_oa_config_release(struct kref *ref)
@@ -4228,7 +4230,7 @@ static struct ctl_table dev_root[] = {
};
/**
- * i915_perf_init - initialize i915-perf state on module load
+ * i915_perf_init - initialize i915-perf state on module bind
* @i915: i915 device instance
*
* Initializes i915-perf state without exposing anything to userspace.
@@ -4345,7 +4347,6 @@ void i915_perf_init(struct drm_i915_private *i915)
oa_sample_rate_hard_limit = 1000 *
(RUNTIME_INFO(i915)->cs_timestamp_frequency_khz / 2);
- perf->sysctl_header = register_sysctl_table(dev_root);
mutex_init(&perf->metrics_lock);
idr_init(&perf->metrics_idr);
@@ -4381,6 +4382,17 @@ static int destroy_config(int id, void *p, void *data)
return 0;
}
+void i915_perf_sysctl_register(void)
+{
+ sysctl_header = register_sysctl_table(dev_root);
+}
+
+void i915_perf_sysctl_unregister(void)
+{
+ if (sysctl_header)
+ unregister_sysctl_table(sysctl_header);
+}
+
/**
* i915_perf_fini - Counter part to i915_perf_init()
* @i915: i915 device instance
@@ -4395,8 +4407,6 @@ void i915_perf_fini(struct drm_i915_private *i915)
idr_for_each(&perf->metrics_idr, destroy_config, perf);
idr_destroy(&perf->metrics_idr);
- unregister_sysctl_table(perf->sysctl_header);
-
memset(&perf->ops, 0, sizeof(perf->ops));
perf->i915 = NULL;
}
diff --git a/drivers/gpu/drm/i915/i915_perf.h b/drivers/gpu/drm/i915/i915_perf.h
index 4ceebce72060..882fdd0a7680 100644
--- a/drivers/gpu/drm/i915/i915_perf.h
+++ b/drivers/gpu/drm/i915/i915_perf.h
@@ -23,6 +23,8 @@ 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(void);
+void 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);
diff --git a/drivers/gpu/drm/i915/i915_perf_types.h b/drivers/gpu/drm/i915/i915_perf_types.h
index 74ddc20a0d37..45e581455f5d 100644
--- a/drivers/gpu/drm/i915/i915_perf_types.h
+++ b/drivers/gpu/drm/i915/i915_perf_types.h
@@ -380,7 +380,6 @@ struct i915_perf {
struct drm_i915_private *i915;
struct kobject *metrics_kobj;
- struct ctl_table_header *sysctl_header;
/*
* Lock associated with adding/modifying/removing OA configs
--
2.21.0.5.gaeb582a983
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