159 lines
4.4 KiB
C
159 lines
4.4 KiB
C
/*
|
|
* 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
|
|
|
|
#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) ")")
|
|
#endif
|
|
|
|
#undef WARN_ON_ONCE
|
|
#define WARN_ON_ONCE(x) WARN_ONCE((x), "%s", "WARN_ON_ONCE(" __stringify(x) ")")
|
|
|
|
#define MISSING_CASE(x) WARN(1, "Missing switch case (%lu) in %s\n", \
|
|
(long)(x), __func__)
|
|
|
|
#if GCC_VERSION >= 70000
|
|
#define add_overflows(A, B) \
|
|
__builtin_add_overflow_p((A), (B), (typeof((A) + (B)))0)
|
|
#else
|
|
#define add_overflows(A, B) ({ \
|
|
typeof(A) a = (A); \
|
|
typeof(B) b = (B); \
|
|
a + b < a; \
|
|
})
|
|
#endif
|
|
|
|
#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))
|
|
|
|
/* Note we don't consider signbits :| */
|
|
#define overflows_type(x, T) \
|
|
(sizeof(x) > sizeof(T) && (x) >> (sizeof(T) * BITS_PER_BYTE))
|
|
|
|
#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 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 ptr_offset(ptr, member) offsetof(typeof(*(ptr)), member)
|
|
|
|
#define fetch_and_zero(ptr) ({ \
|
|
typeof(*ptr) __T = *(ptr); \
|
|
*(ptr) = (typeof(*ptr))0; \
|
|
__T; \
|
|
})
|
|
|
|
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); \
|
|
__idx; \
|
|
})
|
|
|
|
#include <linux/list.h>
|
|
|
|
static inline void __list_del_many(struct list_head *head,
|
|
struct list_head *first)
|
|
{
|
|
first->prev = head;
|
|
WRITE_ONCE(head->next, first);
|
|
}
|
|
|
|
/*
|
|
* Wait until the work is finally complete, even if it tries to postpone
|
|
* by requeueing itself. Note, that if the worker never cancels itself,
|
|
* we will spin forever.
|
|
*/
|
|
static inline void drain_delayed_work(struct delayed_work *dw)
|
|
{
|
|
do {
|
|
while (flush_delayed_work(dw))
|
|
;
|
|
} while (delayed_work_pending(dw));
|
|
}
|
|
|
|
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 *enableddisabled(bool v)
|
|
{
|
|
return v ? "enabled" : "disabled";
|
|
}
|
|
|
|
#endif /* !__I915_UTILS_H */
|