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sys/dev/mana/gdma_util.h

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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2021 Microsoft Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#ifndef _GDMA_UTIL_H_
#define _GDMA_UTIL_H_
#include <sys/types.h>
#include <sys/param.h>
/* Log Levels */
#define MANA_ALERT (1 << 0) /* Alerts are providing more error info. */
#define MANA_WARNING (1 << 1) /* Driver output is more error sensitive. */
#define MANA_INFO (1 << 2) /* Provides additional driver info. */
#define MANA_DBG (1 << 3) /* Driver output for debugging. */
extern int mana_log_level;
#define mana_trace_raw(ctx, level, fmt, args...) \
do { \
((void)(ctx)); \
if (((level) & mana_log_level) != (level)) \
break; \
printf(fmt, ##args); \
} while (0)
#define mana_trace(ctx, level, fmt, args...) \
mana_trace_raw(ctx, level, "%s() [TID:%d]: " \
fmt, __func__, curthread->td_tid, ##args)
#define mana_dbg(ctx, format, arg...) \
mana_trace(ctx, MANA_DBG, format, ##arg)
#define mana_info(ctx, format, arg...) \
mana_trace(ctx, MANA_INFO, format, ##arg)
#define mana_warn(ctx, format, arg...) \
mana_trace(ctx, MANA_WARNING, format, ##arg)
#define mana_err(ctx, format, arg...) \
mana_trace(ctx, MANA_ALERT, format, ##arg)
#define unlikely(x) __predict_false(!!(x))
#define likely(x) __predict_true(!!(x))
#define BITS_PER_LONG (sizeof(long) * NBBY)
#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) % BITS_PER_LONG))
#define BITMAP_LAST_WORD_MASK(n) (~0UL >> (BITS_PER_LONG - (n)))
#define BITS_TO_LONGS(n) howmany((n), BITS_PER_LONG)
#define BIT_MASK(nr) (1UL << ((nr) & (BITS_PER_LONG - 1)))
#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
#undef ALIGN
#define ALIGN(x, y) roundup2((x), (y))
#define IS_ALIGNED(x, a) (((x) & ((__typeof(x))(a) - 1)) == 0)
#define BIT(n) (1ULL << (n))
#define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT))
#define offset_in_page(x) ((x) & PAGE_MASK)
#define min_t(type, _x, _y) \
((type)(_x) < (type)(_y) ? (type)(_x) : (type)(_y))
#define test_bit(i, a) \
((((volatile const unsigned long *)(a))[BIT_WORD(i)]) & BIT_MASK(i))
typedef volatile uint32_t atomic_t;
#define atomic_add_return(v, p) (atomic_fetchadd_int(p, v) + (v))
#define atomic_sub_return(v, p) (atomic_fetchadd_int(p, -(v)) - (v))
#define atomic_inc_return(p) atomic_add_return(1, p)
#define atomic_dec_return(p) atomic_sub_return(1, p)
#define atomic_read(p) atomic_add_return(0, p)
#define usleep_range(_1, _2) \
pause_sbt("gdma-usleep-range", SBT_1US * _1, SBT_1US * 1, C_ABSOLUTE)
static inline void
gdma_msleep(unsigned int ms)
{
if (ms == 0)
ms = 1;
pause_sbt("gdma-msleep", mstosbt(ms), 0, C_HARDCLOCK);
}
static inline void
bitmap_set(unsigned long *map, unsigned int start, int nr)
{
const unsigned int size = start + nr;
int bits_to_set = BITS_PER_LONG - (start % BITS_PER_LONG);
unsigned long mask_to_set = BITMAP_FIRST_WORD_MASK(start);
map += BIT_WORD(start);
while (nr - bits_to_set >= 0) {
*map |= mask_to_set;
nr -= bits_to_set;
bits_to_set = BITS_PER_LONG;
mask_to_set = ~0UL;
map++;
}
if (nr) {
mask_to_set &= BITMAP_LAST_WORD_MASK(size);
*map |= mask_to_set;
}
}
static inline void
bitmap_clear(unsigned long *map, unsigned int start, int nr)
{
const unsigned int size = start + nr;
int bits_to_clear = BITS_PER_LONG - (start % BITS_PER_LONG);
unsigned long mask_to_clear = BITMAP_FIRST_WORD_MASK(start);
map += BIT_WORD(start);
while (nr - bits_to_clear >= 0) {
*map &= ~mask_to_clear;
nr -= bits_to_clear;
bits_to_clear = BITS_PER_LONG;
mask_to_clear = ~0UL;
map++;
}
if (nr) {
mask_to_clear &= BITMAP_LAST_WORD_MASK(size);
*map &= ~mask_to_clear;
}
}
static inline unsigned long
find_first_zero_bit(const unsigned long *p, unsigned long max)
{
unsigned long i, n;
for (i = 0; i < max / BITS_PER_LONG + 1; i++) {
n = ~p[i];
if (n != 0)
return (i * BITS_PER_LONG + ffsl(n) - 1);
}
return (max);
}
static inline unsigned long
ilog2(unsigned long x)
{
unsigned long log = x;
while (x >>= 1)
log++;
return (log);
}
static inline unsigned long
roundup_pow_of_two(unsigned long x)
{
return (1UL << flsl(x - 1));
}
static inline int
is_power_of_2(unsigned long n)
{
return (n == roundup_pow_of_two(n));
}
struct completion {
unsigned int done;
struct mtx lock;
};
void init_completion(struct completion *c);
void free_completion(struct completion *c);
void complete(struct completion *c);
void wait_for_completion(struct completion *c);
int wait_for_completion_timeout(struct completion *c, int timeout);
#endif /* _GDMA_UTIL_H_ */