/* * Copyright © 2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #ifndef __I915_UTILS_H #define __I915_UTILS_H #include <linux/list.h> #include <linux/overflow.h> #include <linux/sched.h> #include <linux/string_helpers.h> #include <linux/types.h> #include <linux/workqueue.h> #include <linux/sched/clock.h> #ifdef CONFIG_X86 #include <asm/hypervisor.h> #endif struct drm_i915_private; struct timer_list; #define FDO_BUG_URL … #define MISSING_CASE(x) … #if IS_ENABLED(CONFIG_DRM_I915_DEBUG) int __i915_inject_probe_error(struct drm_i915_private *i915, int err, const char *func, int line); #define i915_inject_probe_error … bool i915_error_injected(void); #else #define i915_inject_probe_error(i915, e) … #define i915_error_injected() … #endif #define i915_inject_probe_failure(i915) … #define i915_probe_error(i915, fmt, ...) … #define range_overflows(start, size, max) … #define range_overflows_t(type, start, size, max) … #define range_overflows_end(start, size, max) … #define range_overflows_end_t(type, start, size, max) … #define ptr_mask_bits(ptr, n) … #define ptr_unmask_bits(ptr, n) … #define ptr_unpack_bits(ptr, bits, n) … #define ptr_pack_bits(ptr, bits, n) … #define ptr_dec(ptr) … #define ptr_inc(ptr) … #define page_mask_bits(ptr) … #define page_unmask_bits(ptr) … #define page_pack_bits(ptr, bits) … #define page_unpack_bits(ptr, bits) … #define fetch_and_zero(ptr) … static __always_inline ptrdiff_t ptrdiff(const void *a, const void *b) { … } /* * container_of_user: Extract the superclass from a pointer to a member. * * Exactly like container_of() with the exception that it plays nicely * with sparse for __user @ptr. */ #define container_of_user(ptr, type, member) … /* * check_user_mbz: Check that a user value exists and is zero * * Frequently in our uABI we reserve space for future extensions, and * two ensure that userspace is prepared we enforce that space must * be zero. (Then any future extension can safely assume a default value * of 0.) * * check_user_mbz() combines checking that the user pointer is accessible * and that the contained value is zero. * * Returns: -EFAULT if not accessible, -EINVAL if !zero, or 0 on success. */ #define check_user_mbz(U) … #define u64_to_ptr(T, x) … #define __mask_next_bit(mask) … static inline bool is_power_of_2_u64(u64 n) { … } static inline void __list_del_many(struct list_head *head, struct list_head *first) { … } static inline int list_is_last_rcu(const struct list_head *list, const struct list_head *head) { … } static inline unsigned long msecs_to_jiffies_timeout(const unsigned int m) { … } /* * If you need to wait X milliseconds between events A and B, but event B * doesn't happen exactly after event A, you record the timestamp (jiffies) of * when event A happened, then just before event B you call this function and * pass the timestamp as the first argument, and X as the second argument. */ static inline void wait_remaining_ms_from_jiffies(unsigned long timestamp_jiffies, int to_wait_ms) { … } /* * __wait_for - magic wait macro * * Macro to help avoid open coding check/wait/timeout patterns. Note that it's * important that we check the condition again after having timed out, since the * timeout could be due to preemption or similar and we've never had a chance to * check the condition before the timeout. */ #define __wait_for(OP, COND, US, Wmin, Wmax) … #define _wait_for(COND, US, Wmin, Wmax) … #define wait_for(COND, MS) … /* If CONFIG_PREEMPT_COUNT is disabled, in_atomic() always reports false. */ #if defined(CONFIG_DRM_I915_DEBUG) && defined(CONFIG_PREEMPT_COUNT) #define _WAIT_FOR_ATOMIC_CHECK … #else #define _WAIT_FOR_ATOMIC_CHECK(ATOMIC) … #endif #define _wait_for_atomic(COND, US, ATOMIC) … #define wait_for_us(COND, US) … #define wait_for_atomic_us(COND, US) … #define wait_for_atomic(COND, MS) … #define KHz(x) … #define MHz(x) … void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint); static inline void __add_taint_for_CI(unsigned int taint) { … } void cancel_timer(struct timer_list *t); void set_timer_ms(struct timer_list *t, unsigned long timeout); static inline bool timer_active(const struct timer_list *t) { … } static inline bool timer_expired(const struct timer_list *t) { … } static inline bool i915_run_as_guest(void) { … } bool i915_vtd_active(struct drm_i915_private *i915); bool i915_direct_stolen_access(struct drm_i915_private *i915); #endif /* !__I915_UTILS_H */
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