void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
struct btrfs_ioctl_dev_replace_args *args)
{
struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
btrfs_dev_replace_lock(dev_replace);
/* even if !dev_replace_is_valid, the values are good enough for
* the replace_status ioctl */
args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
args->status.replace_state = dev_replace->replace_state;
args->status.time_started = dev_replace->time_started;
args->status.time_stopped = dev_replace->time_stopped;
args->status.num_write_errors =
atomic64_read(&dev_replace->num_write_errors);
args->status.num_uncorrectable_read_errors =
atomic64_read(&dev_replace->num_uncorrectable_read_errors);
switch (dev_replace->replace_state) {
case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
args->status.progress_1000 = 0;
break;
case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
args->status.progress_1000 = 1000;
break;
case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
args->status.progress_1000 = div64_u64(dev_replace->cursor_left,
div64_u64(dev_replace->srcdev->total_bytes, 1000));
break;
}
btrfs_dev_replace_unlock(dev_replace);
}
/* Multiplier multiplies up all calculated values, so that decimal places can be represented */
void Statistics_Calculate(
const StatisticsType *Instance,
unsigned int MeanMultiplier,
uint64_t *Mean,
unsigned int SDMultiplier,
uint64_t *StandardDeviation,
unsigned int *Minimum,
unsigned int *Maximum,
unsigned int *Samples)
{
uint64_t Sum, Sum2, StandardDeviation2n2, StandardDeviationMn;
*Samples = Instance->Samples;
*Minimum = Instance->Minimum;
*Maximum = Instance->Maximum;
if (Instance->Samples == 0)
return;
Sum = Instance->Sum;
*Mean = div64_u64((uint64_t) MeanMultiplier * Sum + (uint64_t) (Instance->Samples / 2), (uint64_t) Instance->Samples);
Sum2 = Instance->Sum2;
StandardDeviation2n2 = (uint64_t) Instance->Samples * Sum2 - Sum * Sum;
StandardDeviationMn = SquareRoot(SDMultiplier * SDMultiplier * StandardDeviation2n2);
*StandardDeviation = div64_u64(StandardDeviationMn + (uint64_t) (Instance->Samples / 2), (uint64_t) Instance->Samples);
}
/*
* Perform (stime * rtime) / total with reduced chances
* of multiplication overflows by using smaller factors
* like quotient and remainders of divisions between
* rtime and total.
*/
static cputime_t scale_stime(u64 stime, u64 rtime, u64 total)
{
u64 rem, res, scaled;
if (rtime >= total) {
/*
* Scale up to rtime / total then add
* the remainder scaled to stime / total.
*/
res = div64_u64_rem(rtime, total, &rem);
scaled = stime * res;
scaled += div64_u64(stime * rem, total);
} else {
/*
* Same in reverse: scale down to total / rtime
* then substract that result scaled to
* to the remaining part.
*/
res = div64_u64_rem(total, rtime, &rem);
scaled = div64_u64(stime, res);
scaled -= div64_u64(scaled * rem, total);
}
return (__force cputime_t) scaled;
}
static unsigned int calc_v_total_from_duration(
const struct dc_stream_state *stream,
const struct mod_vrr_params *vrr,
unsigned int duration_in_us)
{
unsigned int v_total = 0;
if (duration_in_us < vrr->min_duration_in_us)
duration_in_us = vrr->min_duration_in_us;
if (duration_in_us > vrr->max_duration_in_us)
duration_in_us = vrr->max_duration_in_us;
v_total = div64_u64(div64_u64(((unsigned long long)(
duration_in_us) * stream->timing.pix_clk_khz),
stream->timing.h_total), 1000);
/* v_total cannot be less than nominal */
if (v_total < stream->timing.v_total) {
ASSERT(v_total < stream->timing.v_total);
v_total = stream->timing.v_total;
}
return v_total;
}
static int perf_move_data(struct pthr_ctx *pctx, char __iomem *dst, char *src,
u64 buf_size, u64 win_size, u64 total)
{
int chunks, total_chunks, i;
int copied_chunks = 0;
u64 copied = 0, result;
char __iomem *tmp = dst;
u64 perf, diff_us;
ktime_t kstart, kstop, kdiff;
chunks = div64_u64(win_size, buf_size);
total_chunks = div64_u64(total, buf_size);
kstart = ktime_get();
for (i = 0; i < total_chunks; i++) {
result = perf_copy(pctx, tmp, src, buf_size);
copied += result;
copied_chunks++;
if (copied_chunks == chunks) {
tmp = dst;
copied_chunks = 0;
} else
tmp += buf_size;
/* Probably should schedule every 4GB to prevent soft hang. */
if (((copied % SZ_4G) == 0) && !use_dma) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(1);
}
}
if (use_dma) {
pr_info("%s: All DMA descriptors submitted\n", current->comm);
while (atomic_read(&pctx->dma_sync) != 0)
msleep(20);
}
kstop = ktime_get();
kdiff = ktime_sub(kstop, kstart);
diff_us = ktime_to_us(kdiff);
pr_info("%s: copied %llu bytes\n", current->comm, copied);
pr_info("%s: lasted %llu usecs\n", current->comm, diff_us);
perf = div64_u64(copied, diff_us);
pr_info("%s: MBytes/s: %llu\n", current->comm, perf);
return 0;
}
static inline unsigned long offset_to_bit(u64 bitmap_start, u64 sectorsize,
u64 offset)
{
BUG_ON(offset < bitmap_start);
offset -= bitmap_start;
return (unsigned long)(div64_u64(offset, sectorsize));
}
static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno)
{
struct sit_info *sit_i = SIT_I(sbi);
unsigned int secno = GET_SECNO(sbi, segno);
unsigned int start = secno * sbi->segs_per_sec;
unsigned long long mtime = 0;
unsigned int vblocks;
unsigned char age = 0;
unsigned char u;
unsigned int i;
for (i = 0; i < sbi->segs_per_sec; i++)
mtime += get_seg_entry(sbi, start + i)->mtime;
vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);
mtime = div_u64(mtime, sbi->segs_per_sec);
vblocks = div_u64(vblocks, sbi->segs_per_sec);
u = (vblocks * 100) >> sbi->log_blocks_per_seg;
/* Handle if the system time is changed by user */
if (mtime < sit_i->min_mtime)
sit_i->min_mtime = mtime;
if (mtime > sit_i->max_mtime)
sit_i->max_mtime = mtime;
if (sit_i->max_mtime != sit_i->min_mtime)
age = 100 - div64_u64(100 * (mtime - sit_i->min_mtime),
sit_i->max_mtime - sit_i->min_mtime);
return UINT_MAX - ((100 * (100 - u) * age) / (100 + u));
}
/*******************************************
lcdc fps manager,set or get lcdc fps
set:0 get
1 set
********************************************/
static int rk3066b_lcdc_fps_mgr(struct rk_lcdc_device_driver *dev_drv,int fps,bool set)
{
struct rk3066b_lcdc_device *lcdc_dev = container_of(dev_drv,struct rk3066b_lcdc_device,driver);
rk_screen * screen = dev_drv->cur_screen;
u64 ft = 0;
u32 dotclk;
int ret;
if(set)
{
ft = div_u64(1000000000000llu,fps);
dev_drv->pixclock = div_u64(ft,(screen->upper_margin + screen->lower_margin + screen->y_res +screen->vsync_len)*
(screen->left_margin + screen->right_margin + screen->x_res + screen->hsync_len));
dotclk = div_u64(1000000000000llu,dev_drv->pixclock);
ret = clk_set_rate(lcdc_dev->dclk, dotclk);
if(ret)
{
printk(KERN_ERR ">>>>>> set lcdc%d dclk failed\n",lcdc_dev->id);
}
dev_drv->pixclock = lcdc_dev->pixclock = div_u64(1000000000000llu, clk_get_rate(lcdc_dev->dclk));
}
ft = (u64)(screen->upper_margin + screen->lower_margin + screen->y_res +screen->vsync_len)*
(screen->left_margin + screen->right_margin + screen->x_res + screen->hsync_len)*
(dev_drv->pixclock); // one frame time ,(pico seconds)
fps = div64_u64(1000000000000llu,ft);
screen->ft = 1000/fps ; //one frame time in ms
return fps;
}
/**
* sched_get_nr_running_avg
* @return: Average nr_running and iowait value since last poll.
* Returns the avg * 100 to return up to two decimal points
* of accuracy.
*
* Obtains the average nr_running value since the last poll.
* This function may not be called concurrently with itself
*/
void sched_get_nr_running_avg(int *avg)
{
int cpu;
u64 curr_time = sched_clock();
u64 diff = curr_time - last_get_time;
u64 tmp_avg = 0;
*avg = 0;
if (!diff)
return;
last_get_time = curr_time;
/* read and reset nr_running counts */
for_each_possible_cpu(cpu) {
unsigned long flags;
spin_lock_irqsave(&per_cpu(nr_lock, cpu), flags);
tmp_avg += per_cpu(nr_prod_sum, cpu);
tmp_avg += per_cpu(nr, cpu) *
(curr_time - per_cpu(last_time, cpu));
per_cpu(last_time, cpu) = curr_time;
per_cpu(nr_prod_sum, cpu) = 0;
spin_unlock_irqrestore(&per_cpu(nr_lock, cpu), flags);
}
*avg = (int)div64_u64(tmp_avg * 100, diff);
}
int64_t __aeabi_ldivmod(int64_t n, int64_t d)
{
int c = 0;
s64 res;
if (n < 0LL) {
c = ~c;
n = -n;
}
if (d < 0LL) {
c = ~c;
d = -d;
}
if (unlikely(d & 0xffffffff00000000ULL)) {
pr_warn("TE: 64-bit/64-bit div loses precision (0x%llx/0x%llx)\n",
n, d);
BUG();
}
res = div64_u64(n, d);
if (c)
res = -res;
return res;
}
/* Rate limiting */
static uint64_t __calc_target_rate(struct cached_dev *dc)
{
struct cache_set *c = dc->disk.c;
/*
* This is the size of the cache, minus the amount used for
* flash-only devices
*/
uint64_t cache_sectors = c->nbuckets * c->sb.bucket_size -
atomic_long_read(&c->flash_dev_dirty_sectors);
/*
* Unfortunately there is no control of global dirty data. If the
* user states that they want 10% dirty data in the cache, and has,
* e.g., 5 backing volumes of equal size, we try and ensure each
* backing volume uses about 2% of the cache for dirty data.
*/
uint32_t bdev_share =
div64_u64(bdev_sectors(dc->bdev) << WRITEBACK_SHARE_SHIFT,
c->cached_dev_sectors);
uint64_t cache_dirty_target =
div_u64(cache_sectors * dc->writeback_percent, 100);
/* Ensure each backing dev gets at least one dirty share */
if (bdev_share < 1)
bdev_share = 1;
return (cache_dirty_target * bdev_share) >> WRITEBACK_SHARE_SHIFT;
}
static int snd_compr_write_data(struct snd_compr_stream *stream,
const char __user *buf, size_t count)
{
void *dstn;
size_t copy;
struct snd_compr_runtime *runtime = stream->runtime;
/* 64-bit Modulus */
u64 app_pointer = div64_u64(runtime->total_bytes_available,
runtime->buffer_size);
app_pointer = runtime->total_bytes_available -
(app_pointer * runtime->buffer_size);
dstn = runtime->buffer + app_pointer;
pr_debug("copying %zu at %lld\n",
count, app_pointer);
if (count < runtime->buffer_size - app_pointer) {
if (copy_from_user(dstn, buf, count))
return -EFAULT;
} else {
copy = runtime->buffer_size - app_pointer;
if (copy_from_user(dstn, buf, copy))
return -EFAULT;
if (copy_from_user(runtime->buffer, buf + copy, count - copy))
return -EFAULT;
}
/* if DSP cares, let it know data has been written */
if (stream->ops->ack)
stream->ops->ack(stream, count);
return count;
}
/* Number of consecutive frames to check before entering/exiting fixed refresh*/
#define FIXED_REFRESH_ENTER_FRAME_COUNT 5
#define FIXED_REFRESH_EXIT_FRAME_COUNT 5
struct core_freesync {
struct mod_freesync public;
struct dc *dc;
};
#define MOD_FREESYNC_TO_CORE(mod_freesync)\
container_of(mod_freesync, struct core_freesync, public)
struct mod_freesync *mod_freesync_create(struct dc *dc)
{
struct core_freesync *core_freesync =
kzalloc(sizeof(struct core_freesync), GFP_KERNEL);
if (core_freesync == NULL)
goto fail_alloc_context;
if (dc == NULL)
goto fail_construct;
core_freesync->dc = dc;
return &core_freesync->public;
fail_construct:
kfree(core_freesync);
fail_alloc_context:
return NULL;
}
void mod_freesync_destroy(struct mod_freesync *mod_freesync)
{
struct core_freesync *core_freesync = NULL;
if (mod_freesync == NULL)
return;
core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
kfree(core_freesync);
}
#if 0 /* unused currently */
static unsigned int calc_refresh_in_uhz_from_duration(
unsigned int duration_in_ns)
{
unsigned int refresh_in_uhz =
((unsigned int)(div64_u64((1000000000ULL * 1000000),
duration_in_ns)));
return refresh_in_uhz;
}
/**
* sched_get_nr_running_avg
* @return: Average nr_running and iowait value since last poll.
* Returns the avg * 100 to return up to two decimal points
* of accuracy.
*
* Obtains the average nr_running value since the last poll.
* This function may not be called concurrently with itself
*/
void sched_get_nr_running_avg(int *avg, int *iowait_avg)
{
int cpu;
u64 curr_time;
u64 diff_sgnra_last;
u64 diff_last;
u32 faultyclk_cpumask = 0;
u64 tmp;
*avg = 0;
*iowait_avg = 0;
/* read and reset nr_running counts */
for_each_possible_cpu(cpu) {
unsigned long flags;
spin_lock_irqsave(&per_cpu(nr_lock, cpu), flags);
curr_time = sched_clock();
/* error handling for problematic clock violation */
if (curr_time > per_cpu(sgnra_last_time, cpu) && curr_time >= per_cpu(last_time, cpu)) {
diff_last = curr_time - per_cpu(last_time, cpu);
diff_sgnra_last = curr_time - per_cpu(sgnra_last_time, cpu);
tmp = per_cpu(nr, cpu) * diff_last;
tmp += per_cpu(nr_prod_sum, cpu);
*avg += (int)div64_u64(tmp * 100, diff_sgnra_last);
tmp = nr_iowait_cpu(cpu) * diff_last;
tmp += per_cpu(iowait_prod_sum, cpu);
*iowait_avg += (int)div64_u64(tmp * 100, diff_sgnra_last);
} else {
faultyclk_cpumask |= 1 << cpu;
pr_warn("[%s]**** (curr_time %lld), (per_cpu(sgnra_last_time, %d), %lld), (per_cpu(last_time, %d), %lld)\n", __func__, curr_time, cpu, per_cpu(sgnra_last_time, cpu), cpu, per_cpu(last_time, cpu));
}
per_cpu(sgnra_last_time, cpu) = curr_time;
per_cpu(last_time, cpu) = curr_time;
per_cpu(nr_prod_sum, cpu) = 0;
per_cpu(iowait_prod_sum, cpu) = 0;
spin_unlock_irqrestore(&per_cpu(nr_lock, cpu), flags);
}
/* error handling for problematic clock violation*/
if (faultyclk_cpumask) {
*avg = 0;
*iowait_avg = 0;
pr_warn("[%s]**** CPU (%d) clock may unstable !!\n", __func__, faultyclk_cpumask);
return;
}
WARN(*avg < 0, "[sched_get_nr_running_avg] avg:%d", *avg);
WARN(*iowait_avg < 0, "[sched_get_nr_running_avg] iowait_avg:%d", *iowait_avg);
}
static unsigned int calc_duration_in_us_from_refresh_in_uhz(
unsigned int refresh_in_uhz)
{
unsigned int duration_in_us =
((unsigned int)(div64_u64((1000000000ULL * 1000),
refresh_in_uhz)));
return duration_in_us;
}
uint64_t __aeabi_uldivmod(uint64_t n, uint64_t d)
{
if (unlikely(d & 0xffffffff00000000ULL)) {
pr_warn("TE: 64-bit/64-bit div loses precision (0x%llx/0x%llx)\n",
n, d);
BUG();
}
return div64_u64(n, d);
}
static void nft_limit_pkt_bytes_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
struct nft_limit *priv = nft_expr_priv(expr);
u64 cost = div64_u64(priv->nsecs * pkt->skb->len, priv->rate);
if (nft_limit_eval(priv, cost))
regs->verdict.code = NFT_BREAK;
}
static unsigned int calc_duration_in_us_from_v_total(
const struct dc_stream_state *stream,
const struct mod_vrr_params *in_vrr,
unsigned int v_total)
{
unsigned int duration_in_us =
(unsigned int)(div64_u64(((unsigned long long)(v_total)
* 1000) * stream->timing.h_total,
stream->timing.pix_clk_khz));
return duration_in_us;
}
/* Borrow from ptb */
static inline void precompute_ratedata(struct wfq_rate_cfg *r)
{
r->shift = 0;
r->mult = 1;
if (r->rate_bps > 0)
{
r->shift = 15;
r->mult = div64_u64(8LLU * NSEC_PER_SEC * (1 << r->shift),
r->rate_bps);
}
}
static cputime_t scale_utime(cputime_t utime, cputime_t rtime, cputime_t total)
{
u64 temp = (__force u64) rtime;
temp *= (__force u64) utime;
if (sizeof(cputime_t) == 4)
temp = div_u64(temp, (__force u32) total);
else
temp = div64_u64(temp, (__force u64) total);
return (__force cputime_t) temp;
}
/**
* sched_get_nr_running_avg
* @return: Average nr_running and iowait value since last poll.
* Returns the avg * 100 to return up to two decimal points
* of accuracy.
*
* Obtains the average nr_running value since the last poll.
* This function may not be called concurrently with itself
*/
void sched_get_nr_running_avg(int *avg, int *iowait_avg)
{
int cpu;
u64 curr_time = sched_clock();
u64 diff = curr_time - last_get_time;
u64 tmp_avg = 0, tmp_iowait = 0;
*avg = 0;
*iowait_avg = 0;
if (!diff)
return;
last_get_time = curr_time;
/* read and reset nr_running counts */
for_each_possible_cpu(cpu) {
unsigned long flags;
spin_lock_irqsave(&per_cpu(nr_lock, cpu), flags);
tmp_avg += per_cpu(nr_prod_sum, cpu);
tmp_avg += per_cpu(nr, cpu) *
(curr_time - per_cpu(last_time, cpu));
tmp_iowait = per_cpu(iowait_prod_sum, cpu);
tmp_iowait += nr_iowait_cpu(cpu) *
(curr_time - per_cpu(last_time, cpu));
per_cpu(last_time, cpu) = curr_time;
per_cpu(nr_prod_sum, cpu) = 0;
per_cpu(iowait_prod_sum, cpu) = 0;
spin_unlock_irqrestore(&per_cpu(nr_lock, cpu), flags);
}
*avg = (int)div64_u64(tmp_avg * 100, diff);
*iowait_avg = (int)div64_u64(tmp_iowait * 100, diff);
BUG_ON(*avg < 0);
pr_debug("%s - avg:%d\n", __func__, *avg);
BUG_ON(*iowait_avg < 0);
pr_debug("%s - avg:%d\n", __func__, *iowait_avg);
}
static int msm_compr_pointer(struct snd_compr_stream *cstream,
struct snd_compr_tstamp *arg)
{
struct snd_compr_runtime *runtime = cstream->runtime;
struct msm_compr_audio *prtd = runtime->private_data;
struct snd_compr_tstamp tstamp;
uint64_t timestamp = 0;
int rc = 0, first_buffer;
unsigned long flags;
pr_debug("%s\n", __func__);
memset(&tstamp, 0x0, sizeof(struct snd_compr_tstamp));
spin_lock_irqsave(&prtd->lock, flags);
tstamp.sampling_rate = prtd->sample_rate;
tstamp.byte_offset = prtd->byte_offset;
tstamp.copied_total = prtd->copied_total;
first_buffer = prtd->first_buffer;
if (atomic_read(&prtd->error)) {
pr_err("%s Got RESET EVENTS notification, return error", __func__);
tstamp.pcm_io_frames = 0;
memcpy(arg, &tstamp, sizeof(struct snd_compr_tstamp));
spin_unlock_irqrestore(&prtd->lock, flags);
return -EINVAL;
}
spin_unlock_irqrestore(&prtd->lock, flags);
/*
Query timestamp from DSP if some data is with it.
This prevents timeouts.
*/
if (!first_buffer) {
rc = q6asm_get_session_time(prtd->audio_client, ×tamp);
if (rc < 0) {
pr_err("%s: Get Session Time return value =%lld\n",
__func__, timestamp);
return -EAGAIN;
}
}
/* DSP returns timestamp in usec */
pr_debug("%s: timestamp = %lld usec\n", __func__, timestamp);
timestamp *= prtd->sample_rate;
tstamp.pcm_io_frames = (snd_pcm_uframes_t)div64_u64(timestamp, 1000000);
memcpy(arg, &tstamp, sizeof(struct snd_compr_tstamp));
return 0;
}
static int compr_pointer(struct snd_compr_stream *cstream,
struct snd_compr_tstamp *tstamp)
{
struct snd_compr_runtime *runtime = cstream->runtime;
struct runtime_data *prtd = runtime->private_data;
struct snd_compr_tstamp timestamp;
unsigned long flags;
int pcm_size, bytes_available;
int num_channel;
pr_debug("%s\n", __func__);
#ifdef AUDIO_PERF
prtd->start_time[POINTER_T] = sched_clock();
#endif
memset(×tamp, 0x0, sizeof(struct snd_compr_tstamp));
spin_lock_irqsave(&prtd->lock, flags);
timestamp.sampling_rate = prtd->ap->sample_rate;
timestamp.byte_offset = prtd->byte_offset;
timestamp.copied_total = prtd->copied_total;
pcm_size = esa_compr_pcm_size();
/* set the number of channels */
if (prtd->ap->num_channels == 1 || prtd->ap->num_channels == 2)
num_channel = 1;
else if (prtd->ap->num_channels == 3)
num_channel = 2;
else
num_channel = 2;
spin_unlock_irqrestore(&prtd->lock, flags);
if (pcm_size) {
bytes_available = prtd->received_total - prtd->copied_total;
timestamp.pcm_io_frames = (snd_pcm_uframes_t)div64_u64(pcm_size,
2 * num_channel);
pr_debug("%s: pcm_size(%u), frame_count(%u), copied_total(%llu), \
free_size(%llu)\n", __func__, pcm_size,
timestamp.pcm_io_frames, prtd->copied_total,
runtime->buffer_size - bytes_available);
}
memcpy(tstamp, ×tamp, sizeof(struct snd_compr_tstamp));
#ifdef AUDIO_PERF
prtd->end_time[POINTER_T] = sched_clock();
prtd->total_time[POINTER_T] +=
prtd->end_time[POINTER_T] - prtd->start_time[POINTER_T];
#endif
return 0;
}
static void __update_writeback_rate(struct cached_dev *dc)
{
struct cache_set *c = dc->disk.c;
uint64_t cache_sectors = c->nbuckets * c->sb.bucket_size;
uint64_t cache_dirty_target =
div_u64(cache_sectors * dc->writeback_percent, 100);
int64_t target = div64_u64(cache_dirty_target * bdev_sectors(dc->bdev),
c->cached_dev_sectors);
/* PD controller */
int64_t dirty = bcache_dev_sectors_dirty(&dc->disk);
int64_t derivative = dirty - dc->disk.sectors_dirty_last;
int64_t proportional = dirty - target;
int64_t change;
dc->disk.sectors_dirty_last = dirty;
/* Scale to sectors per second */
proportional *= dc->writeback_rate_update_seconds;
proportional = div_s64(proportional, dc->writeback_rate_p_term_inverse);
derivative = div_s64(derivative, dc->writeback_rate_update_seconds);
derivative = ewma_add(dc->disk.sectors_dirty_derivative, derivative,
(dc->writeback_rate_d_term /
dc->writeback_rate_update_seconds) ?: 1, 0);
derivative *= dc->writeback_rate_d_term;
derivative = div_s64(derivative, dc->writeback_rate_p_term_inverse);
change = proportional + derivative;
/* Don't increase writeback rate if the device isn't keeping up */
if (change > 0 &&
time_after64(local_clock(),
dc->writeback_rate.next + NSEC_PER_MSEC))
change = 0;
dc->writeback_rate.rate =
clamp_t(int64_t, (int64_t) dc->writeback_rate.rate + change,
1, NSEC_PER_MSEC);
dc->writeback_rate_proportional = proportional;
dc->writeback_rate_derivative = derivative;
dc->writeback_rate_change = change;
dc->writeback_rate_target = target;
}
static unsigned int calc_v_total_from_refresh(
const struct dc_stream_state *stream,
unsigned int refresh_in_uhz)
{
unsigned int v_total = stream->timing.v_total;
unsigned int frame_duration_in_ns;
frame_duration_in_ns =
((unsigned int)(div64_u64((1000000000ULL * 1000000),
refresh_in_uhz)));
v_total = div64_u64(div64_u64(((unsigned long long)(
frame_duration_in_ns) * stream->timing.pix_clk_khz),
stream->timing.h_total), 1000000);
/* v_total cannot be less than nominal */
if (v_total < stream->timing.v_total) {
ASSERT(v_total < stream->timing.v_total);
v_total = stream->timing.v_total;
}
return v_total;
}
static int nft_limit_pkts_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_limit_pkts *priv = nft_expr_priv(expr);
int err;
err = nft_limit_init(&priv->limit, tb);
if (err < 0)
return err;
priv->cost = div64_u64(priv->limit.nsecs, priv->limit.rate);
return 0;
}
static inline u64 offset_to_bitmap(struct btrfs_block_group_cache *block_group,
u64 offset)
{
u64 bitmap_start;
u64 bytes_per_bitmap;
bytes_per_bitmap = BITS_PER_BITMAP * block_group->sectorsize;
bitmap_start = offset - block_group->key.objectid;
bitmap_start = div64_u64(bitmap_start, bytes_per_bitmap);
bitmap_start *= bytes_per_bitmap;
bitmap_start += block_group->key.objectid;
return bitmap_start;
}
static ssize_t show_screen_info(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct fb_info *fbi = dev_get_drvdata(dev);
struct rk_lcdc_driver *dev_drv = (struct rk_lcdc_driver *)fbi->par;
struct rk_screen *screen = dev_drv->screen0;
int fps;
u32 x = (screen->mode.left_margin + screen->mode.right_margin + screen->mode.xres + screen->mode.hsync_len);
u32 y = (screen->mode.upper_margin + screen->mode.lower_margin + screen->mode.yres + screen->mode.vsync_len);
u64 ft = (u64)x * y * (dev_drv->pixclock); // one frame time ,(pico seconds)
fps = div64_u64(1000000000000llu, ft);
return snprintf(buf, PAGE_SIZE, "xres:%d\nyres:%d\nfps:%d\n",
screen->mode.xres, screen->mode.yres, fps);
}
/*
* Returns true if we're sure to have found the definitive divider (ie
* deviation == 0).
*/
static bool skl_wrpll_try_divider(struct skl_wrpll_context *ctx,
uint64_t central_freq,
uint64_t dco_freq,
unsigned int divider)
{
uint64_t deviation;
bool found = false;
deviation = div64_u64(10000 * abs_diff(dco_freq, central_freq),
central_freq);
/* positive deviation */
if (dco_freq >= central_freq) {
if (deviation < SKL_MAX_PDEVIATION &&
deviation < ctx->min_deviation) {
ctx->min_deviation = deviation;
ctx->central_freq = central_freq;
ctx->dco_freq = dco_freq;
ctx->p = divider;
#if 0
found = true;
#endif
}
/* we can't improve a 0 deviation */
if (deviation == 0)
return true;
/* negative deviation */
} else if (deviation < SKL_MAX_NDEVIATION &&
deviation < ctx->min_deviation) {
ctx->min_deviation = deviation;
ctx->central_freq = central_freq;
ctx->dco_freq = dco_freq;
ctx->p = divider;
#if 0
found = true;
#endif
}
if (found) {
printf("Divider %d\n", divider);
printf("Deviation %"PRIu64"\n", deviation);
printf("dco_freq: %"PRIu64", dco_central_freq %"PRIu64"\n",
dco_freq, central_freq);
}
return false;
}
static ssize_t debugfs_run_read(struct file *filp, char __user *ubuf,
size_t count, loff_t *offp)
{
struct perf_ctx *perf = filp->private_data;
char *buf;
ssize_t ret, out_off = 0;
struct pthr_ctx *pctx;
int i;
u64 rate;
if (!perf)
return 0;
buf = kmalloc(1024, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (mutex_is_locked(&perf->run_mutex)) {
out_off = scnprintf(buf, 64, "running\n");
goto read_from_buf;
}
for (i = 0; i < MAX_THREADS; i++) {
pctx = &perf->pthr_ctx[i];
if (pctx->status == -ENODATA)
break;
if (pctx->status) {
out_off += scnprintf(buf + out_off, 1024 - out_off,
"%d: error %d\n", i,
pctx->status);
continue;
}
rate = div64_u64(pctx->copied, pctx->diff_us);
out_off += scnprintf(buf + out_off, 1024 - out_off,
"%d: copied %llu bytes in %llu usecs, %llu MBytes/s\n",
i, pctx->copied, pctx->diff_us, rate);
}
read_from_buf:
ret = simple_read_from_buffer(ubuf, count, offp, buf, out_off);
kfree(buf);
return ret;
}