Add support for forcing an error at selected places in the driver. As an example add 3 options to fail during driver loading.
Requested by Chris. CC: Chris Wilson <[email protected]> Signed-off-by: Imre Deak <[email protected]> --- [This depends on https://lists.freedesktop.org/archives/intel-gfx/2016-March/089597.html] drivers/gpu/drm/i915/i915_dma.c | 9 +++++++++ drivers/gpu/drm/i915/i915_drv.h | 4 ++++ drivers/gpu/drm/i915/i915_params.c | 6 ++++++ drivers/gpu/drm/i915/i915_params.h | 1 + 4 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index b1dbf1b..d12ae0b 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -950,6 +950,9 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv, struct intel_device_info *device_info; int ret = 0; + if (i915.inject_fault & I915_FAULT_INIT_EARLY) + return -ENODEV; + dev_priv->dev = dev; /* Setup the write-once "constant" device info */ @@ -1064,6 +1067,9 @@ static int i915_driver_init_mmio(struct drm_i915_private *dev_priv) struct drm_device *dev = dev_priv->dev; int ret; + if (i915.inject_fault & I915_FAULT_INIT_MMIO) + return -ENODEV; + if (i915_get_bridge_dev(dev)) return -EIO; @@ -1107,6 +1113,9 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv) uint32_t aperture_size; int ret; + if (i915.inject_fault & I915_FAULT_INIT_HW) + return -ENODEV; + intel_device_info_runtime_init(dev); ret = i915_gem_gtt_init(dev); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index f62b6d1..5122ed9 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -98,6 +98,10 @@ #define I915_STATE_WARN_ON(x) \ I915_STATE_WARN((x), "%s", "WARN_ON(" __stringify(x) ")") +#define I915_FAULT_INIT_EARLY 0x0001 +#define I915_FAULT_INIT_MMIO 0x0002 +#define I915_FAULT_INIT_HW 0x0004 + static inline const char *yesno(bool v) { return v ? "yes" : "no"; diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 278c9c4..21f8dd3 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -56,6 +56,7 @@ struct i915_params i915 __read_mostly = { .edp_vswing = 0, .enable_guc_submission = false, .guc_log_level = -1, + .inject_fault = 0, }; module_param_named(modeset, i915.modeset, int, 0400); @@ -201,3 +202,8 @@ MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)") module_param_named(guc_log_level, i915.guc_log_level, int, 0400); MODULE_PARM_DESC(guc_log_level, "GuC firmware logging level (-1:disabled (default), 0-3:enabled)"); + +module_param_named(inject_fault, i915.inject_fault, uint, 0600); +MODULE_PARM_DESC(inject_fault, + "Force an error at selected points " + "(0:disabled, 0x1:INIT_EARLY, 0x2:INIT_MMIO, 0x4:INIT_HW)"); diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index bd5026b..2989a48 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -59,6 +59,7 @@ struct i915_params { bool enable_guc_submission; bool verbose_state_checks; bool nuclear_pageflip; + unsigned int inject_fault; }; extern struct i915_params i915 __read_mostly; -- 2.5.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
