372f244b01
With the previous cleanups, the last remaining user of __i915_printk() is i915_probe_error(). Switch that to use drm_dbg() and drm_err() instead, dropping the request to report bugs in the few remaining specific cases. It's not common for drivers to log bug filing requests to begin with, but these cases are in init, which is most likely to be tested in CI and least likely to be hit by end users anyway. Acked-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/be9baeab281f75999e96cc7ad1c06c6680494bc1.1722951405.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#include <linux/device.h>
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#include <drm/drm_drv.h>
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#include "i915_drv.h"
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#include "i915_reg.h"
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#include "i915_utils.h"
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void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint)
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{
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drm_notice(&i915->drm, "CI tainted: %#x by %pS\n",
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taint, __builtin_return_address(0));
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/* Failures that occur during fault injection testing are expected */
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if (!i915_error_injected())
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__add_taint_for_CI(taint);
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}
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#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
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static unsigned int i915_probe_fail_count;
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int __i915_inject_probe_error(struct drm_i915_private *i915, int err,
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const char *func, int line)
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{
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if (i915_probe_fail_count >= i915_modparams.inject_probe_failure)
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return 0;
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if (++i915_probe_fail_count < i915_modparams.inject_probe_failure)
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return 0;
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drm_info(&i915->drm, "Injecting failure %d at checkpoint %u [%s:%d]\n",
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err, i915_modparams.inject_probe_failure, func, line);
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i915_modparams.inject_probe_failure = 0;
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return err;
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}
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bool i915_error_injected(void)
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{
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return i915_probe_fail_count && !i915_modparams.inject_probe_failure;
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}
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#endif
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void cancel_timer(struct timer_list *t)
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{
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if (!timer_active(t))
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return;
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del_timer(t);
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WRITE_ONCE(t->expires, 0);
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}
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void set_timer_ms(struct timer_list *t, unsigned long timeout)
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{
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if (!timeout) {
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cancel_timer(t);
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return;
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}
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timeout = msecs_to_jiffies(timeout);
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/*
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* Paranoia to make sure the compiler computes the timeout before
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* loading 'jiffies' as jiffies is volatile and may be updated in
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* the background by a timer tick. All to reduce the complexity
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* of the addition and reduce the risk of losing a jiffie.
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*/
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barrier();
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/* Keep t->expires = 0 reserved to indicate a canceled timer. */
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mod_timer(t, jiffies + timeout ?: 1);
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}
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bool i915_vtd_active(struct drm_i915_private *i915)
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{
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if (device_iommu_mapped(i915->drm.dev))
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return true;
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/* Running as a guest, we assume the host is enforcing VT'd */
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return i915_run_as_guest();
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}
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bool i915_direct_stolen_access(struct drm_i915_private *i915)
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{
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/*
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* Wa_22018444074
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*
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* Access via BAR can hang MTL, go directly to GSM/DSM,
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* except for VM guests which won't have access to it.
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*
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* Normally this would not work but on MTL the system firmware
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* should have relaxed the access permissions sufficiently.
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* 0x138914==0x1 indicates that the firmware has done its job.
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*/
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return IS_METEORLAKE(i915) && !i915_run_as_guest() &&
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intel_uncore_read(&i915->uncore, MTL_PCODE_STOLEN_ACCESS) == STOLEN_ACCESS_ALLOWED;
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}
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