1 files changed, 23 insertions, 364 deletions

diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h
index 5259edacde38..4f75115b87d6 100644
--- a/drivers/gpu/drm/i915/i915_utils.h
+++ b/drivers/gpu/drm/i915/i915_utils.h
@@ -25,41 +25,23 @@
 #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>
 
-struct drm_i915_private;
-struct timer_list;
-
-#define FDO_BUG_URL "https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs"
-
-#undef WARN_ON
-/* Many gcc seem to no see through this and fall over :( */
-#if 0
-#define WARN_ON(x) ({ \
-	bool __i915_warn_cond = (x); \
-	if (__builtin_constant_p(__i915_warn_cond)) \
-		BUILD_BUG_ON(__i915_warn_cond); \
-	WARN(__i915_warn_cond, "WARN_ON(" #x ")"); })
-#else
-#define WARN_ON(x) WARN((x), "%s", "WARN_ON(" __stringify(x) ")")
+#ifdef CONFIG_X86
+#include <asm/hypervisor.h>
 #endif
 
-#undef WARN_ON_ONCE
-#define WARN_ON_ONCE(x) WARN_ONCE((x), "%s", "WARN_ON_ONCE(" __stringify(x) ")")
+struct drm_i915_private;
 
+#ifndef MISSING_CASE
 #define MISSING_CASE(x) WARN(1, "Missing case (%s == %ld)\n", \
 			     __stringify(x), (long)(x))
-
-void __printf(3, 4)
-__i915_printk(struct drm_i915_private *dev_priv, const char *level,
-	      const char *fmt, ...);
-
-#define i915_report_error(dev_priv, fmt, ...)				   \
-	__i915_printk(dev_priv, KERN_ERR, fmt, ##__VA_ARGS__)
+#endif
 
 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
 
@@ -78,146 +60,20 @@ bool i915_error_injected(void);
 
 #define i915_inject_probe_failure(i915) i915_inject_probe_error((i915), -ENODEV)
 
-#define i915_probe_error(i915, fmt, ...)				   \
-	__i915_printk(i915, i915_error_injected() ? KERN_DEBUG : KERN_ERR, \
-		      fmt, ##__VA_ARGS__)
-
-#if defined(GCC_VERSION) && GCC_VERSION >= 70000
-#define add_overflows_t(T, A, B) \
-	__builtin_add_overflow_p((A), (B), (T)0)
-#else
-#define add_overflows_t(T, A, B) ({ \
-	typeof(A) a = (A); \
-	typeof(B) b = (B); \
-	(T)(a + b) < a; \
-})
-#endif
-
-#define add_overflows(A, B) \
-	add_overflows_t(typeof((A) + (B)), (A), (B))
-
-#define range_overflows(start, size, max) ({ \
-	typeof(start) start__ = (start); \
-	typeof(size) size__ = (size); \
-	typeof(max) max__ = (max); \
-	(void)(&start__ == &size__); \
-	(void)(&start__ == &max__); \
-	start__ >= max__ || size__ > max__ - start__; \
-})
-
-#define range_overflows_t(type, start, size, max) \
-	range_overflows((type)(start), (type)(size), (type)(max))
-
-#define range_overflows_end(start, size, max) ({ \
-	typeof(start) start__ = (start); \
-	typeof(size) size__ = (size); \
-	typeof(max) max__ = (max); \
-	(void)(&start__ == &size__); \
-	(void)(&start__ == &max__); \
-	start__ > max__ || size__ > max__ - start__; \
-})
-
-#define range_overflows_end_t(type, start, size, max) \
-	range_overflows_end((type)(start), (type)(size), (type)(max))
-
-/* Note we don't consider signbits :| */
-#define overflows_type(x, T) \
-	(sizeof(x) > sizeof(T) && (x) >> BITS_PER_TYPE(T))
-
-static inline bool
-__check_struct_size(size_t base, size_t arr, size_t count, size_t *size)
-{
-	size_t sz;
-
-	if (check_mul_overflow(count, arr, &sz))
-		return false;
-
-	if (check_add_overflow(sz, base, &sz))
-		return false;
-
-	*size = sz;
-	return true;
-}
-
-/**
- * check_struct_size() - Calculate size of structure with trailing array.
- * @p: Pointer to the structure.
- * @member: Name of the array member.
- * @n: Number of elements in the array.
- * @sz: Total size of structure and array
- *
- * Calculates size of memory needed for structure @p followed by an
- * array of @n @member elements, like struct_size() but reports
- * whether it overflowed, and the resultant size in @sz
- *
- * Return: false if the calculation overflowed.
- */
-#define check_struct_size(p, member, n, sz) \
-	likely(__check_struct_size(sizeof(*(p)), \
-				   sizeof(*(p)->member) + __must_be_array((p)->member), \
-				   n, sz))
-
-#define ptr_mask_bits(ptr, n) ({					\
-	unsigned long __v = (unsigned long)(ptr);			\
-	(typeof(ptr))(__v & -BIT(n));					\
-})
-
-#define ptr_unmask_bits(ptr, n) ((unsigned long)(ptr) & (BIT(n) - 1))
-
-#define ptr_unpack_bits(ptr, bits, n) ({				\
-	unsigned long __v = (unsigned long)(ptr);			\
-	*(bits) = __v & (BIT(n) - 1);					\
-	(typeof(ptr))(__v & -BIT(n));					\
-})
-
-#define ptr_pack_bits(ptr, bits, n) ({					\
-	unsigned long __bits = (bits);					\
-	GEM_BUG_ON(__bits & -BIT(n));					\
-	((typeof(ptr))((unsigned long)(ptr) | __bits));			\
-})
-
-#define ptr_dec(ptr) ({							\
-	unsigned long __v = (unsigned long)(ptr);			\
-	(typeof(ptr))(__v - 1);						\
-})
-
-#define ptr_inc(ptr) ({							\
-	unsigned long __v = (unsigned long)(ptr);			\
-	(typeof(ptr))(__v + 1);						\
+#define i915_probe_error(i915, fmt, ...) ({ \
+	if (i915_error_injected()) \
+		drm_dbg(&(i915)->drm, fmt, ##__VA_ARGS__); \
+	else \
+		drm_err(&(i915)->drm, fmt, ##__VA_ARGS__); \
 })
 
-#define page_mask_bits(ptr) ptr_mask_bits(ptr, PAGE_SHIFT)
-#define page_unmask_bits(ptr) ptr_unmask_bits(ptr, PAGE_SHIFT)
-#define page_pack_bits(ptr, bits) ptr_pack_bits(ptr, bits, PAGE_SHIFT)
-#define page_unpack_bits(ptr, bits) ptr_unpack_bits(ptr, bits, PAGE_SHIFT)
-
-#define struct_member(T, member) (((T *)0)->member)
-
-#define ptr_offset(ptr, member) offsetof(typeof(*(ptr)), member)
-
+#ifndef fetch_and_zero
 #define fetch_and_zero(ptr) ({						\
 	typeof(*ptr) __T = *(ptr);					\
 	*(ptr) = (typeof(*ptr))0;					\
 	__T;								\
 })
-
-static __always_inline ptrdiff_t ptrdiff(const void *a, const void *b)
-{
-	return a - 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) ({				\
-	void __user *__mptr = (void __user *)(ptr);			\
-	BUILD_BUG_ON_MSG(!__same_type(*(ptr), struct_member(type, member)) && \
-			 !__same_type(*(ptr), void),			\
-			 "pointer type mismatch in container_of()");	\
-	((type __user *)(__mptr - offsetof(type, member))); })
+#endif
 
 /*
  * check_user_mbz: Check that a user value exists and is zero
@@ -237,16 +93,6 @@ static __always_inline ptrdiff_t ptrdiff(const void *a, const void *b)
 	get_user(mbz__, (U)) ? -EFAULT : mbz__ ? -EINVAL : 0;		\
 })
 
-static inline u64 ptr_to_u64(const void *ptr)
-{
-	return (uintptr_t)ptr;
-}
-
-#define u64_to_ptr(T, x) ({						\
-	typecheck(u64, x);						\
-	(T *)(uintptr_t)(x);						\
-})
-
 #define __mask_next_bit(mask) ({					\
 	int __idx = ffs(mask) - 1;					\
 	mask &= ~BIT(__idx);						\
@@ -258,181 +104,6 @@ static inline bool is_power_of_2_u64(u64 n)
 	return (n != 0 && ((n & (n - 1)) == 0));
 }
 
-static inline void __list_del_many(struct list_head *head,
-				   struct list_head *first)
-{
-	first->prev = head;
-	WRITE_ONCE(head->next, first);
-}
-
-static inline int list_is_last_rcu(const struct list_head *list,
-				   const struct list_head *head)
-{
-	return READ_ONCE(list->next) == head;
-}
-
-static inline unsigned long msecs_to_jiffies_timeout(const unsigned int m)
-{
-	unsigned long j = msecs_to_jiffies(m);
-
-	return min_t(unsigned long, MAX_JIFFY_OFFSET, j + 1);
-}
-
-/*
- * 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)
-{
-	unsigned long target_jiffies, tmp_jiffies, remaining_jiffies;
-
-	/*
-	 * Don't re-read the value of "jiffies" every time since it may change
-	 * behind our back and break the math.
-	 */
-	tmp_jiffies = jiffies;
-	target_jiffies = timestamp_jiffies +
-			 msecs_to_jiffies_timeout(to_wait_ms);
-
-	if (time_after(target_jiffies, tmp_jiffies)) {
-		remaining_jiffies = target_jiffies - tmp_jiffies;
-		while (remaining_jiffies)
-			remaining_jiffies =
-			    schedule_timeout_uninterruptible(remaining_jiffies);
-	}
-}
-
-/**
- * __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) ({ \
-	const ktime_t end__ = ktime_add_ns(ktime_get_raw(), 1000ll * (US)); \
-	long wait__ = (Wmin); /* recommended min for usleep is 10 us */	\
-	int ret__;							\
-	might_sleep();							\
-	for (;;) {							\
-		const bool expired__ = ktime_after(ktime_get_raw(), end__); \
-		OP;							\
-		/* Guarantee COND check prior to timeout */		\
-		barrier();						\
-		if (COND) {						\
-			ret__ = 0;					\
-			break;						\
-		}							\
-		if (expired__) {					\
-			ret__ = -ETIMEDOUT;				\
-			break;						\
-		}							\
-		usleep_range(wait__, wait__ * 2);			\
-		if (wait__ < (Wmax))					\
-			wait__ <<= 1;					\
-	}								\
-	ret__;								\
-})
-
-#define _wait_for(COND, US, Wmin, Wmax)	__wait_for(, (COND), (US), (Wmin), \
-						   (Wmax))
-#define wait_for(COND, MS)		_wait_for((COND), (MS) * 1000, 10, 1000)
-
-/* 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(ATOMIC) WARN_ON_ONCE((ATOMIC) && !in_atomic())
-#else
-# define _WAIT_FOR_ATOMIC_CHECK(ATOMIC) do { } while (0)
-#endif
-
-#define _wait_for_atomic(COND, US, ATOMIC) \
-({ \
-	int cpu, ret, timeout = (US) * 1000; \
-	u64 base; \
-	_WAIT_FOR_ATOMIC_CHECK(ATOMIC); \
-	if (!(ATOMIC)) { \
-		preempt_disable(); \
-		cpu = smp_processor_id(); \
-	} \
-	base = local_clock(); \
-	for (;;) { \
-		u64 now = local_clock(); \
-		if (!(ATOMIC)) \
-			preempt_enable(); \
-		/* Guarantee COND check prior to timeout */ \
-		barrier(); \
-		if (COND) { \
-			ret = 0; \
-			break; \
-		} \
-		if (now - base >= timeout) { \
-			ret = -ETIMEDOUT; \
-			break; \
-		} \
-		cpu_relax(); \
-		if (!(ATOMIC)) { \
-			preempt_disable(); \
-			if (unlikely(cpu != smp_processor_id())) { \
-				timeout -= now - base; \
-				cpu = smp_processor_id(); \
-				base = local_clock(); \
-			} \
-		} \
-	} \
-	ret; \
-})
-
-#define wait_for_us(COND, US) \
-({ \
-	int ret__; \
-	BUILD_BUG_ON(!__builtin_constant_p(US)); \
-	if ((US) > 10) \
-		ret__ = _wait_for((COND), (US), 10, 10); \
-	else \
-		ret__ = _wait_for_atomic((COND), (US), 0); \
-	ret__; \
-})
-
-#define wait_for_atomic_us(COND, US) \
-({ \
-	BUILD_BUG_ON(!__builtin_constant_p(US)); \
-	BUILD_BUG_ON((US) > 50000); \
-	_wait_for_atomic((COND), (US), 1); \
-})
-
-#define wait_for_atomic(COND, MS) wait_for_atomic_us((COND), (MS) * 1000)
-
-#define KHz(x) (1000 * (x))
-#define MHz(x) KHz(1000 * (x))
-
-#define KBps(x) (1000 * (x))
-#define MBps(x) KBps(1000 * (x))
-#define GBps(x) ((u64)1000 * MBps((x)))
-
-static inline const char *yesno(bool v)
-{
-	return v ? "yes" : "no";
-}
-
-static inline const char *onoff(bool v)
-{
-	return v ? "on" : "off";
-}
-
-static inline const char *enabledisable(bool v)
-{
-	return v ? "enable" : "disable";
-}
-
-static inline const char *enableddisabled(bool v)
-{
-	return v ? "enabled" : "disabled";
-}
-
 void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint);
 static inline void __add_taint_for_CI(unsigned int taint)
 {
@@ -445,30 +116,18 @@ static inline void __add_taint_for_CI(unsigned int taint)
 	add_taint(taint, LOCKDEP_STILL_OK);
 }
 
-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 i915_run_as_guest(void)
 {
-	return READ_ONCE(t->expires);
+#if IS_ENABLED(CONFIG_X86)
+	return !hypervisor_is_type(X86_HYPER_NATIVE);
+#else
+	/* Not supported yet */
+	return false;
+#endif
 }
 
-static inline bool timer_expired(const struct timer_list *t)
-{
-	return timer_active(t) && !timer_pending(t);
-}
+bool i915_vtd_active(struct drm_i915_private *i915);
 
-/*
- * This is a lookalike for IS_ENABLED() that takes a kconfig value,
- * e.g. CONFIG_DRM_I915_SPIN_REQUEST, and evaluates whether it is non-zero
- * i.e. whether the configuration is active. Wrapping up the config inside
- * a boolean context prevents clang and smatch from complaining about potential
- * issues in confusing logical-&& with bitwise-& for constants.
- *
- * Sadly IS_ENABLED() itself does not work with kconfig values.
- *
- * Returns 0 if @config is 0, 1 if set to any value.
- */
-#define IS_ACTIVE(config) ((config) != 0)
+bool i915_direct_stolen_access(struct drm_i915_private *i915);
 
 #endif /* !__I915_UTILS_H */