513 lines
14 KiB
C
513 lines
14 KiB
C
#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 = 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;
|
|
}
|
|
|
|
|
|
|
|
void *kmap(struct page *page)
|
|
{
|
|
void *vaddr;
|
|
|
|
vaddr = (void*)MapIoMem(page_to_phys(page), 4096, PG_SW);
|
|
|
|
return vaddr;
|
|
}
|
|
|
|
unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size)
|
|
{
|
|
const unsigned long *p = addr;
|
|
unsigned long result = 0;
|
|
unsigned long tmp;
|
|
|
|
while (size & ~(BITS_PER_LONG-1)) {
|
|
if (~(tmp = *(p++)))
|
|
goto found;
|
|
result += BITS_PER_LONG;
|
|
size -= BITS_PER_LONG;
|
|
}
|
|
if (!size)
|
|
return result;
|
|
|
|
tmp = (*p) | (~0UL << size);
|
|
if (tmp == ~0UL) /* Are any bits zero? */
|
|
return result + size; /* Nope. */
|
|
found:
|
|
return result + ffz(tmp);
|
|
}
|
|
|