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b062cf5456
The remaining utils display needs from i915_utils.h are primarily MISSING_CASE() and fetch_and_zero(), with a couple of i915_inject_probe_failure() uses. To avoid excessive churn, add duplicates of MISSING_CASE() and fetch_and_zero() to intel_display_utils.h, and switch display to use the display utils. As long as there are display files that include i915_drv.h, which includes i915_utils.h, we'll need #ifndef guards for MISSING_CASE() and fetch_and_zero() in both utils headers. We can remove them once display no longer depends on i915_drv.h. A couple of files in display still need i915_utils.h for i915_inject_probe_failure(). Annotate this. They will be handled separately. Reviewed-by: Luca Coelho <luciano.coelho@intel.com> Link: https://patch.msgid.link/79f9e31ca64c8c045834d48e20ceb0c515d1e9e1.1761146196.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef __I915_UTILS_H
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#define __I915_UTILS_H
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#include <linux/overflow.h>
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#include <linux/sched.h>
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#include <linux/string_helpers.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <linux/sched/clock.h>
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#ifdef CONFIG_X86
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#include <asm/hypervisor.h>
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#endif
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struct drm_i915_private;
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#ifndef MISSING_CASE
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#define MISSING_CASE(x) WARN(1, "Missing case (%s == %ld)\n", \
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__stringify(x), (long)(x))
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#endif
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#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
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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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#define i915_inject_probe_error(_i915, _err) \
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__i915_inject_probe_error((_i915), (_err), __func__, __LINE__)
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bool i915_error_injected(void);
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#else
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#define i915_inject_probe_error(i915, e) ({ BUILD_BUG_ON_INVALID(i915); 0; })
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#define i915_error_injected() false
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#endif
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#define i915_inject_probe_failure(i915) i915_inject_probe_error((i915), -ENODEV)
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#define i915_probe_error(i915, fmt, ...) ({ \
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if (i915_error_injected()) \
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drm_dbg(&(i915)->drm, fmt, ##__VA_ARGS__); \
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else \
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drm_err(&(i915)->drm, fmt, ##__VA_ARGS__); \
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})
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#ifndef fetch_and_zero
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#define fetch_and_zero(ptr) ({ \
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typeof(*ptr) __T = *(ptr); \
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*(ptr) = (typeof(*ptr))0; \
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__T; \
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})
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#endif
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/*
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* check_user_mbz: Check that a user value exists and is zero
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*
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* Frequently in our uABI we reserve space for future extensions, and
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* two ensure that userspace is prepared we enforce that space must
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* be zero. (Then any future extension can safely assume a default value
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* of 0.)
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*
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* check_user_mbz() combines checking that the user pointer is accessible
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* and that the contained value is zero.
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*
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* Returns: -EFAULT if not accessible, -EINVAL if !zero, or 0 on success.
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*/
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#define check_user_mbz(U) ({ \
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typeof(*(U)) mbz__; \
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get_user(mbz__, (U)) ? -EFAULT : mbz__ ? -EINVAL : 0; \
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})
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#define __mask_next_bit(mask) ({ \
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int __idx = ffs(mask) - 1; \
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mask &= ~BIT(__idx); \
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__idx; \
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})
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static inline bool is_power_of_2_u64(u64 n)
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{
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return (n != 0 && ((n & (n - 1)) == 0));
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}
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void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint);
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static inline void __add_taint_for_CI(unsigned int taint)
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{
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/*
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* The system is "ok", just about surviving for the user, but
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* CI results are now unreliable as the HW is very suspect.
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* CI checks the taint state after every test and will reboot
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* the machine if the kernel is tainted.
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*/
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add_taint(taint, LOCKDEP_STILL_OK);
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}
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static inline bool i915_run_as_guest(void)
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{
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#if IS_ENABLED(CONFIG_X86)
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return !hypervisor_is_type(X86_HYPER_NATIVE);
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#else
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/* Not supported yet */
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return false;
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#endif
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}
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bool i915_vtd_active(struct drm_i915_private *i915);
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bool i915_direct_stolen_access(struct drm_i915_private *i915);
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#endif /* !__I915_UTILS_H */
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