drm/i915/i915_utils.h

43 #define FDO_BUG_URL "https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html"
63 #define i915_inject_probe_failure(i915) i915_inject_probe_error((i915), -ENODEV)
67 		drm_dbg(&(i915)->drm, fmt, ##__VA_ARGS__); \
69 		drm_err(&(i915)->drm, fmt, ##__VA_ARGS__); \
78 	start__ >= max__ || size__ > max__ - start__; \
90 	start__ > max__ || size__ > max__ - start__; \
98 	(typeof(ptr))(__v & -BIT(n));					\
101 #define ptr_unmask_bits(ptr, n) ((unsigned long)(ptr) & (BIT(n) - 1))
105 	*(bits) = __v & (BIT(n) - 1);					\
106 	(typeof(ptr))(__v & -BIT(n));					\
111 	GEM_BUG_ON(__bits & -BIT(n));					\
117 	(typeof(ptr))(__v - 1);						\
138 	return a - b;  in ptrdiff()
152 	((type __user *)(__mptr - offsetof(type, member))); })
165  * Returns: -EFAULT if not accessible, -EINVAL if !zero, or 0 on success.
169 	get_user(mbz__, (U)) ? -EFAULT : mbz__ ? -EINVAL : 0;		\
172 #define u64_to_ptr(T, x) ({						\  argument
174 	(T *)(uintptr_t)(x);						\
178 	int __idx = ffs(mask) - 1;					\
185 	return (n != 0 && ((n & (n - 1)) == 0));  in is_power_of_2_u64()
191 	first->prev = head;  in __list_del_many()
192 	WRITE_ONCE(head->next, first);  in __list_del_many()
198 	return READ_ONCE(list->next) == head;  in list_is_last_rcu()
210  * doesn't happen exactly after event A, you record the timestamp (jiffies) of
220 	 * Don't re-read the value of "jiffies" every time since it may change  in wait_remaining_ms_from_jiffies()
228 		remaining_jiffies = target_jiffies - tmp_jiffies;  in wait_remaining_ms_from_jiffies()
236  * __wait_for - magic wait macro
244 	const ktime_t end__ = ktime_add_ns(ktime_get_raw(), 1000ll * (US)); \
258 			ret__ = -ETIMEDOUT;				\
270 #define wait_for(COND, MS)		_wait_for((COND), (MS) * 1000, 10, 1000)
281 	int cpu, ret, timeout = (US) * 1000; \
282 	u64 base; \
288 	base = local_clock(); \
299 		if (now - base >= timeout) { \
300 			ret = -ETIMEDOUT; \
307 				timeout -= now - base; \
309 				base = local_clock(); \
334 #define wait_for_atomic(COND, MS) wait_for_atomic_us((COND), (MS) * 1000)
336 #define KHz(x) (1000 * (x))
337 #define MHz(x) KHz(1000 * (x))
351 void cancel_timer(struct timer_list *t);
352 void set_timer_ms(struct timer_list *t, unsigned long timeout);
354 static inline bool timer_active(const struct timer_list *t)  in timer_active()  argument
356 	return READ_ONCE(t->expires);  in timer_active()
359 static inline bool timer_expired(const struct timer_list *t)  in timer_expired()  argument
361 	return timer_active(t) && !timer_pending(t);  in timer_expired()