[Intel-gfx] [RFC PATCH 05/11] drm/i915: move load failure injection to selftests
Jani Nikula
jani.nikula at intel.com
Fri Dec 21 13:31:40 UTC 2018
Seems like selftests is a better home for everything related to load
failure injection, including the module parameter.
The failure injection code gets moved from under DRM_I915_DEBUG to
DRM_I915_SELFTEST config option. This should be of no consequence, as
the former selects the latter.
With the parameter no longer part of i915_params, its value will not be
recorded in error capture or debugfs param dump. Note that the value
would have been zeroed anyway if a selftest had been hit, so there
should not be meaningful information loss here, especially with all the
logging around failure injection.
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 25 -------------------------
drivers/gpu/drm/i915/i915_drv.h | 15 ---------------
drivers/gpu/drm/i915/i915_params.c | 5 -----
drivers/gpu/drm/i915/i915_params.h | 1 -
drivers/gpu/drm/i915/i915_selftest.h | 10 ++++++++++
drivers/gpu/drm/i915/selftests/i915_selftest.c | 26 ++++++++++++++++++++++++++
6 files changed, 36 insertions(+), 46 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index caa055ac9472..559a1b11f3e4 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -57,31 +57,6 @@
static struct drm_driver driver;
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
-static unsigned int i915_load_fail_count;
-
-bool __i915_inject_load_failure(const char *func, int line)
-{
- if (i915_load_fail_count >= i915_modparams.inject_load_failure)
- return false;
-
- if (++i915_load_fail_count == i915_modparams.inject_load_failure) {
- DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
- i915_modparams.inject_load_failure, func, line);
- i915_modparams.inject_load_failure = 0;
- return true;
- }
-
- return false;
-}
-
-bool i915_error_injected(void)
-{
- return i915_load_fail_count && !i915_modparams.inject_load_failure;
-}
-
-#endif
-
#define FDO_BUG_URL "https://bugs.freedesktop.org/enter_bug.cgi?product=DRI"
#define FDO_BUG_MSG "Please file a bug at " FDO_BUG_URL " against DRM/Intel " \
"providing the dmesg log by booting with drm.debug=0xf"
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b6158ec21065..fef4da3bddc5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -111,21 +111,6 @@
#define I915_STATE_WARN_ON(x) \
I915_STATE_WARN((x), "%s", "WARN_ON(" __stringify(x) ")")
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
-
-bool __i915_inject_load_failure(const char *func, int line);
-#define i915_inject_load_failure() \
- __i915_inject_load_failure(__func__, __LINE__)
-
-bool i915_error_injected(void);
-
-#else
-
-#define i915_inject_load_failure() false
-#define i915_error_injected() false
-
-#endif
-
#define i915_load_error(i915, fmt, ...) \
__i915_printk(i915, i915_error_injected() ? KERN_DEBUG : KERN_ERR, \
fmt, ##__VA_ARGS__)
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 9f0539bdaa39..2853b54570eb 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -159,11 +159,6 @@ i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
i915_param_named_unsafe(enable_dp_mst, bool, 0600,
"Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
-i915_param_named_unsafe(inject_load_failure, uint, 0400,
- "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
-#endif
-
i915_param_named(enable_dpcd_backlight, bool, 0600,
"Enable support for DPCD backlight control (default:false)");
diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h
index 93f665eced16..85a9007c0ed6 100644
--- a/drivers/gpu/drm/i915/i915_params.h
+++ b/drivers/gpu/drm/i915/i915_params.h
@@ -53,7 +53,6 @@ struct drm_printer;
param(int, mmio_debug, 0) \
param(int, edp_vswing, 0) \
param(int, reset, 2) \
- param(unsigned int, inject_load_failure, 0) \
/* leave bools at the end to not create holes */ \
param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT)) \
param(bool, enable_hangcheck, true) \
diff --git a/drivers/gpu/drm/i915/i915_selftest.h b/drivers/gpu/drm/i915/i915_selftest.h
index a73472dd12fd..1266cef8bf17 100644
--- a/drivers/gpu/drm/i915/i915_selftest.h
+++ b/drivers/gpu/drm/i915/i915_selftest.h
@@ -33,6 +33,7 @@ struct i915_selftest {
unsigned int random_seed;
int mock;
int live;
+ unsigned int inject_load_failure;
};
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
@@ -77,6 +78,12 @@ int __i915_subtests(const char *caller,
#define I915_SELFTEST_DECLARE(x) x
#define I915_SELFTEST_ONLY(x) unlikely(x)
+bool __i915_inject_load_failure(const char *func, int line);
+#define i915_inject_load_failure() \
+ __i915_inject_load_failure(__func__, __LINE__)
+
+bool i915_error_injected(void);
+
#else /* !IS_ENABLED(CONFIG_DRM_I915_SELFTEST) */
static inline int i915_mock_selftests(void) { return 0; }
@@ -85,6 +92,9 @@ static inline int i915_live_selftests(struct pci_dev *pdev) { return 0; }
#define I915_SELFTEST_DECLARE(x)
#define I915_SELFTEST_ONLY(x) 0
+static inline int i915_inject_load_failure(void) { return false; }
+static inline int i915_error_injected(void) { return false; }
+
#endif
/* Using the i915_selftest_ prefix becomes a little unwieldy with the helpers.
diff --git a/drivers/gpu/drm/i915/selftests/i915_selftest.c b/drivers/gpu/drm/i915/selftests/i915_selftest.c
index 86c54ea37f48..9e556fc4707d 100644
--- a/drivers/gpu/drm/i915/selftests/i915_selftest.c
+++ b/drivers/gpu/drm/i915/selftests/i915_selftest.c
@@ -250,3 +250,29 @@ MODULE_PARM_DESC(mock_selftests, "Run selftests before loading, using mock hardw
module_param_named_unsafe(live_selftests, i915_selftest.live, int, 0400);
MODULE_PARM_DESC(live_selftests, "Run selftests after driver initialisation on the live system (0:disabled [default], 1:run tests then continue, -1:run tests then exit module)");
+
+module_param_named_unsafe(inject_load_failure, i915_selftest.inject_load_failure, uint, 0400);
+MODULE_PARM_DESC(inject_load_failure,
+ "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
+
+static unsigned int i915_load_fail_count;
+
+bool __i915_inject_load_failure(const char *func, int line)
+{
+ if (i915_load_fail_count >= i915_selftest.inject_load_failure)
+ return false;
+
+ if (++i915_load_fail_count == i915_selftest.inject_load_failure) {
+ DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
+ i915_selftest.inject_load_failure, func, line);
+ i915_selftest.inject_load_failure = 0;
+ return true;
+ }
+
+ return false;
+}
+
+bool i915_error_injected(void)
+{
+ return i915_load_fail_count && !i915_selftest.inject_load_failure;
+}
--
2.11.0
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