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kolibrios/drivers/video/drm/i915/utils.c
Sergey Semyonov (Serge) 8aa816f1ce drm: 3.19-rc2 
git-svn-id: svn://kolibrios.org@5354 a494cfbc-eb01-0410-851d-a64ba20cac60
2015-01-05 19:15:42 +00:00

779 lines
21 KiB
C
Raw Blame History

#include <ddk.h>
#include <linux/mm.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include <linux/hdmi.h>
struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags)
{
struct file *filep;
int count;
filep = __builtin_malloc(sizeof(*filep));
if(unlikely(filep == NULL))
return ERR_PTR(-ENOMEM);
count = size / PAGE_SIZE;
filep->pages = kzalloc(sizeof(struct page *) * count, 0);
if(unlikely(filep->pages == NULL))
{
kfree(filep);
return ERR_PTR(-ENOMEM);
};
filep->count = count;
filep->allocated = 0;
filep->vma = NULL;
// printf("%s file %p pages %p count %d\n",
// __FUNCTION__,filep, filep->pages, count);
return filep;
}
struct page *shmem_read_mapping_page_gfp(struct file *filep,
pgoff_t index, gfp_t gfp)
{
struct page *page;
if(unlikely(index >= filep->count))
return ERR_PTR(-EINVAL);
page = filep->pages[index];
if(unlikely(page == NULL))
{
page = (struct page *)AllocPage();
if(unlikely(page == NULL))
return ERR_PTR(-ENOMEM);
filep->pages[index] = page;
// printf("file %p index %d page %x\n", filep, index, page);
// delay(1);
};
return page;
};
unsigned long vm_mmap(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot,
unsigned long flag, unsigned long offset)
{
char *mem, *ptr;
int i;
if (unlikely(offset + PAGE_ALIGN(len) < offset))
return -EINVAL;
if (unlikely(offset & ~PAGE_MASK))
return -EINVAL;
mem = UserAlloc(len);
if(unlikely(mem == NULL))
return -ENOMEM;
for(i = offset, ptr = mem; i < offset+len; i+= 4096, ptr+= 4096)
{
struct page *page;
page = shmem_read_mapping_page_gfp(file, i/PAGE_SIZE,0);
if (unlikely(IS_ERR(page)))
goto err;
MapPage(ptr, (addr_t)page, PG_SHARED|PG_UW);
}
return (unsigned long)mem;
err:
UserFree(mem);
return -ENOMEM;
};
void shmem_file_delete(struct file *filep)
{
// printf("%s file %p pages %p count %d\n",
// __FUNCTION__, filep, filep->pages, filep->count);
if(filep->pages)
kfree(filep->pages);
}
static void *check_bytes8(const u8 *start, u8 value, unsigned int bytes)
{
while (bytes) {
if (*start != value)
return (void *)start;
start++;
bytes--;
}
return NULL;
}
/**
* memchr_inv - Find an unmatching character in an area of memory.
* @start: The memory area
* @c: Find a character other than c
* @bytes: The size of the area.
*
* returns the address of the first character other than @c, or %NULL
* if the whole buffer contains just @c.
*/
void *memchr_inv(const void *start, int c, size_t bytes)
{
u8 value = c;
u64 value64;
unsigned int words, prefix;
if (bytes <= 16)
return check_bytes8(start, value, bytes);
value64 = value;
#if defined(ARCH_HAS_FAST_MULTIPLIER) && BITS_PER_LONG == 64
value64 *= 0x0101010101010101;
#elif defined(ARCH_HAS_FAST_MULTIPLIER)
value64 *= 0x01010101;
value64 |= value64 << 32;
#else
value64 |= value64 << 8;
value64 |= value64 << 16;
value64 |= value64 << 32;
#endif
prefix = (unsigned long)start % 8;
if (prefix) {
u8 *r;
prefix = 8 - prefix;
r = check_bytes8(start, value, prefix);
if (r)
return r;
start += prefix;
bytes -= prefix;
}
words = bytes / 8;
while (words) {
if (*(u64 *)start != value64)
return check_bytes8(start, value, 8);
start += 8;
words--;
}
return check_bytes8(start, value, bytes % 8);
}
int dma_map_sg(struct device *dev, struct scatterlist *sglist,
int nelems, int dir)
{
struct scatterlist *s;
int i;
for_each_sg(sglist, s, nelems, i) {
s->dma_address = (dma_addr_t)sg_phys(s);
#ifdef CONFIG_NEED_SG_DMA_LENGTH
s->dma_length = s->length;
#endif
}
return nelems;
}
#define _U 0x01 /* upper */
#define _L 0x02 /* lower */
#define _D 0x04 /* digit */
#define _C 0x08 /* cntrl */
#define _P 0x10 /* punct */
#define _S 0x20 /* white space (space/lf/tab) */
#define _X 0x40 /* hex digit */
#define _SP 0x80 /* hard space (0x20) */
extern const unsigned char _ctype[];
#define __ismask(x) (_ctype[(int)(unsigned char)(x)])
#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
#define iscntrl(c) ((__ismask(c)&(_C)) != 0)
#define isdigit(c) ((__ismask(c)&(_D)) != 0)
#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
#define islower(c) ((__ismask(c)&(_L)) != 0)
#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
#define ispunct(c) ((__ismask(c)&(_P)) != 0)
/* Note: isspace() must return false for %NUL-terminator */
#define isspace(c) ((__ismask(c)&(_S)) != 0)
#define isupper(c) ((__ismask(c)&(_U)) != 0)
#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)
#define isascii(c) (((unsigned char)(c))<=0x7f)
#define toascii(c) (((unsigned char)(c))&0x7f)
static inline unsigned char __tolower(unsigned char c)
{
if (isupper(c))
c -= 'A'-'a';
return c;
}
static inline unsigned char __toupper(unsigned char c)
{
if (islower(c))
c -= 'a'-'A';
return c;
}
#define tolower(c) __tolower(c)
#define toupper(c) __toupper(c)
/*
* Fast implementation of tolower() for internal usage. Do not use in your
* code.
*/
static inline char _tolower(const char c)
{
return c | 0x20;
}
//const char hex_asc[] = "0123456789abcdef";
/**
* hex_to_bin - convert a hex digit to its real value
* @ch: ascii character represents hex digit
*
* hex_to_bin() converts one hex digit to its actual value or -1 in case of bad
* input.
*/
int hex_to_bin(char ch)
{
if ((ch >= '0') && (ch <= '9'))
return ch - '0';
ch = tolower(ch);
if ((ch >= 'a') && (ch <= 'f'))
return ch - 'a' + 10;
return -1;
}
EXPORT_SYMBOL(hex_to_bin);
/**
* hex2bin - convert an ascii hexadecimal string to its binary representation
* @dst: binary result
* @src: ascii hexadecimal string
* @count: result length
*
* Return 0 on success, -1 in case of bad input.
*/
int hex2bin(u8 *dst, const char *src, size_t count)
{
while (count--) {
int hi = hex_to_bin(*src++);
int lo = hex_to_bin(*src++);
if ((hi < 0) || (lo < 0))
return -1;
*dst++ = (hi << 4) | lo;
}
return 0;
}
EXPORT_SYMBOL(hex2bin);
/**
* hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
* @buf: data blob to dump
* @len: number of bytes in the @buf
* @rowsize: number of bytes to print per line; must be 16 or 32
* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
* @linebuf: where to put the converted data
* @linebuflen: total size of @linebuf, including space for terminating NUL
* @ascii: include ASCII after the hex output
*
* hex_dump_to_buffer() works on one "line" of output at a time, i.e.,
* 16 or 32 bytes of input data converted to hex + ASCII output.
*
* Given a buffer of u8 data, hex_dump_to_buffer() converts the input data
* to a hex + ASCII dump at the supplied memory location.
* The converted output is always NUL-terminated.
*
* E.g.:
* hex_dump_to_buffer(frame->data, frame->len, 16, 1,
* linebuf, sizeof(linebuf), true);
*
* example output buffer:
* 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
*/
void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
int groupsize, char *linebuf, size_t linebuflen,
bool ascii)
{
const u8 *ptr = buf;
u8 ch;
int j, lx = 0;
int ascii_column;
if (rowsize != 16 && rowsize != 32)
rowsize = 16;
if (!len)
goto nil;
if (len > rowsize) /* limit to one line at a time */
len = rowsize;
if ((len % groupsize) != 0) /* no mixed size output */
groupsize = 1;
switch (groupsize) {
case 8: {
const u64 *ptr8 = buf;
int ngroups = len / groupsize;
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
"%s%16.16llx", j ? " " : "",
(unsigned long long)*(ptr8 + j));
ascii_column = 17 * ngroups + 2;
break;
}
case 4: {
const u32 *ptr4 = buf;
int ngroups = len / groupsize;
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
"%s%8.8x", j ? " " : "", *(ptr4 + j));
ascii_column = 9 * ngroups + 2;
break;
}
case 2: {
const u16 *ptr2 = buf;
int ngroups = len / groupsize;
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
"%s%4.4x", j ? " " : "", *(ptr2 + j));
ascii_column = 5 * ngroups + 2;
break;
}
default:
for (j = 0; (j < len) && (lx + 3) <= linebuflen; j++) {
ch = ptr[j];
linebuf[lx++] = hex_asc_hi(ch);
linebuf[lx++] = hex_asc_lo(ch);
linebuf[lx++] = ' ';
}
if (j)
lx--;
ascii_column = 3 * rowsize + 2;
break;
}
if (!ascii)
goto nil;
while (lx < (linebuflen - 1) && lx < (ascii_column - 1))
linebuf[lx++] = ' ';
for (j = 0; (j < len) && (lx + 2) < linebuflen; j++) {
ch = ptr[j];
linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';
}
nil:
linebuf[lx++] = '\0';
}
/**
* print_hex_dump - print a text hex dump to syslog for a binary blob of data
* @level: kernel log level (e.g. KERN_DEBUG)
* @prefix_str: string to prefix each line with;
* caller supplies trailing spaces for alignment if desired
* @prefix_type: controls whether prefix of an offset, address, or none
* is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)
* @rowsize: number of bytes to print per line; must be 16 or 32
* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
* @buf: data blob to dump
* @len: number of bytes in the @buf
* @ascii: include ASCII after the hex output
*
* Given a buffer of u8 data, print_hex_dump() prints a hex + ASCII dump
* to the kernel log at the specified kernel log level, with an optional
* leading prefix.
*
* print_hex_dump() works on one "line" of output at a time, i.e.,
* 16 or 32 bytes of input data converted to hex + ASCII output.
* print_hex_dump() iterates over the entire input @buf, breaking it into
* "line size" chunks to format and print.
*
* E.g.:
* print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS,
* 16, 1, frame->data, frame->len, true);
*
* Example output using %DUMP_PREFIX_OFFSET and 1-byte mode:
* 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
* Example output using %DUMP_PREFIX_ADDRESS and 4-byte mode:
* ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c pqrstuvwxyz{|}~.
*/
void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
int rowsize, int groupsize,
const void *buf, size_t len, bool ascii)
{
const u8 *ptr = buf;
int i, linelen, remaining = len;
unsigned char linebuf[32 * 3 + 2 + 32 + 1];
if (rowsize != 16 && rowsize != 32)
rowsize = 16;
for (i = 0; i < len; i += rowsize) {
linelen = min(remaining, rowsize);
remaining -= rowsize;
hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
linebuf, sizeof(linebuf), ascii);
switch (prefix_type) {
case DUMP_PREFIX_ADDRESS:
printk("%s%s%p: %s\n",
level, prefix_str, ptr + i, linebuf);
break;
case DUMP_PREFIX_OFFSET:
printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf);
break;
default:
printk("%s%s%s\n", level, prefix_str, linebuf);
break;
}
}
}
void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len)
{
print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,
buf, len, true);
}
void *kmemdup(const void *src, size_t len, gfp_t gfp)
{
void *p;
p = kmalloc(len, gfp);
if (p)
memcpy(p, src, len);
return p;
}
#define KMAP_MAX 256
static struct mutex kmap_mutex;
static struct page* kmap_table[KMAP_MAX];
static int kmap_av;
static int kmap_first;
static void* kmap_base;
int kmap_init()
{
kmap_base = AllocKernelSpace(KMAP_MAX*4096);
if(kmap_base == NULL)
return -1;
kmap_av = KMAP_MAX;
MutexInit(&kmap_mutex);
return 0;
};
void *kmap(struct page *page)
{
void *vaddr = NULL;
int i;
do
{
MutexLock(&kmap_mutex);
if(kmap_av != 0)
{
for(i = kmap_first; i < KMAP_MAX; i++)
{
if(kmap_table[i] == NULL)
{
kmap_av--;
kmap_first = i;
kmap_table[i] = page;
vaddr = kmap_base + (i<<12);
MapPage(vaddr,(addr_t)page,3);
break;
};
};
};
MutexUnlock(&kmap_mutex);
}while(vaddr == NULL);
return vaddr;
};
void *kmap_atomic(struct page *page) __attribute__ ((alias ("kmap")));
void kunmap(struct page *page)
{
void *vaddr;
int i;
MutexLock(&kmap_mutex);
for(i = 0; i < KMAP_MAX; i++)
{
if(kmap_table[i] == page)
{
kmap_av++;
if(i < kmap_first)
kmap_first = i;
kmap_table[i] = NULL;
vaddr = kmap_base + (i<<12);
MapPage(vaddr,0,0);
break;
};
};
MutexUnlock(&kmap_mutex);
};
void kunmap_atomic(void *vaddr)
{
int i;
MapPage(vaddr,0,0);
i = (vaddr - kmap_base) >> 12;
MutexLock(&kmap_mutex);
kmap_av++;
if(i < kmap_first)
kmap_first = i;
kmap_table[i] = NULL;
MutexUnlock(&kmap_mutex);
}
size_t strlcat(char *dest, const char *src, size_t count)
{
size_t dsize = strlen(dest);
size_t len = strlen(src);
size_t res = dsize + len;
/* This would be a bug */
BUG_ON(dsize >= count);
dest += dsize;
count -= dsize;
if (len >= count)
len = count-1;
memcpy(dest, src, len);
dest[len] = 0;
return res;
}
EXPORT_SYMBOL(strlcat);
void msleep(unsigned int msecs)
{
msecs /= 10;
if(!msecs) msecs = 1;
__asm__ __volatile__ (
"call *__imp__Delay"
::"b" (msecs));
__asm__ __volatile__ (
"":::"ebx");
};
/* simple loop based delay: */
static void delay_loop(unsigned long loops)
{
asm volatile(
" test %0,%0 \n"
" jz 3f \n"
" jmp 1f \n"
".align 16 \n"
"1: jmp 2f \n"
".align 16 \n"
"2: dec %0 \n"
" jnz 2b \n"
"3: dec %0 \n"
: /* we don't need output */
:"a" (loops)
);
}
static void (*delay_fn)(unsigned long) = delay_loop;
void __delay(unsigned long loops)
{
delay_fn(loops);
}
inline void __const_udelay(unsigned long xloops)
{
int d0;
xloops *= 4;
asm("mull %%edx"
: "=d" (xloops), "=&a" (d0)
: "1" (xloops), ""
(loops_per_jiffy * (HZ/4)));
__delay(++xloops);
}
void __udelay(unsigned long usecs)
{
__const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */
}
unsigned int _sw_hweight32(unsigned int w)
{
#ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER
w -= (w >> 1) & 0x55555555;
w = (w & 0x33333333) + ((w >> 2) & 0x33333333);
w = (w + (w >> 4)) & 0x0f0f0f0f;
return (w * 0x01010101) >> 24;
#else
unsigned int res = w - ((w >> 1) & 0x55555555);
res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
res = (res + (res >> 4)) & 0x0F0F0F0F;
res = res + (res >> 8);
return (res + (res >> 16)) & 0x000000FF;
#endif
}
EXPORT_SYMBOL(_sw_hweight32);
void usleep_range(unsigned long min, unsigned long max)
{
udelay(max);
}
EXPORT_SYMBOL(usleep_range);
static unsigned long round_jiffies_common(unsigned long j, int cpu,
bool force_up)
{
int rem;
unsigned long original = j;
/*
* We don't want all cpus firing their timers at once hitting the
* same lock or cachelines, so we skew each extra cpu with an extra
* 3 jiffies. This 3 jiffies came originally from the mm/ code which
* already did this.
* The skew is done by adding 3*cpunr, then round, then subtract this
* extra offset again.
*/
j += cpu * 3;
rem = j % HZ;
/*
* If the target jiffie is just after a whole second (which can happen
* due to delays of the timer irq, long irq off times etc etc) then
* we should round down to the whole second, not up. Use 1/4th second
* as cutoff for this rounding as an extreme upper bound for this.
* But never round down if @force_up is set.
*/
if (rem < HZ/4 && !force_up) /* round down */
j = j - rem;
else /* round up */
j = j - rem + HZ;
/* now that we have rounded, subtract the extra skew again */
j -= cpu * 3;
/*
* Make sure j is still in the future. Otherwise return the
* unmodified value.
*/
return time_is_after_jiffies(j) ? j : original;
}
unsigned long round_jiffies_up_relative(unsigned long j, int cpu)
{
unsigned long j0 = jiffies;
/* Use j0 because jiffies might change while we run */
return round_jiffies_common(j + j0, 0, true) - j0;
}
EXPORT_SYMBOL_GPL(__round_jiffies_up_relative);
#include <linux/rcupdate.h>
struct rcu_ctrlblk {
struct rcu_head *rcucblist; /* List of pending callbacks (CBs). */
struct rcu_head **donetail; /* ->next pointer of last "done" CB. */
struct rcu_head **curtail; /* ->next pointer of last CB. */
// RCU_TRACE(long qlen); /* Number of pending CBs. */
// RCU_TRACE(unsigned long gp_start); /* Start time for stalls. */
// RCU_TRACE(unsigned long ticks_this_gp); /* Statistic for stalls. */
// RCU_TRACE(unsigned long jiffies_stall); /* Jiffies at next stall. */
// RCU_TRACE(const char *name); /* Name of RCU type. */
};
/* Definition for rcupdate control block. */
static struct rcu_ctrlblk rcu_sched_ctrlblk = {
.donetail = &rcu_sched_ctrlblk.rcucblist,
.curtail = &rcu_sched_ctrlblk.rcucblist,
// RCU_TRACE(.name = "rcu_sched")
};
static void __call_rcu(struct rcu_head *head,
void (*func)(struct rcu_head *rcu),
struct rcu_ctrlblk *rcp)
{
unsigned long flags;
// debug_rcu_head_queue(head);
head->func = func;
head->next = NULL;
local_irq_save(flags);
*rcp->curtail = head;
rcp->curtail = &head->next;
// RCU_TRACE(rcp->qlen++);
local_irq_restore(flags);
}
/*
* Post an RCU callback to be invoked after the end of an RCU-sched grace
* period. But since we have but one CPU, that would be after any
* quiescent state.
*/
void call_rcu_sched(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
{
__call_rcu(head, func, &rcu_sched_ctrlblk);
}
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