| 4,6 → 4,7 |
|---|
| #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) |
| 102,3 → 103,410 |
|---|
| if(filep->pages) |
| kfree(filep->pages); |
| } |
| |
| /** |
| * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe |
| * @frame: HDMI AVI infoframe |
| * |
| * Returns 0 on success or a negative error code on failure. |
| */ |
| int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame) |
| { |
| memset(frame, 0, sizeof(*frame)); |
| |
| frame->type = HDMI_INFOFRAME_TYPE_AVI; |
| frame->version = 2; |
| frame->length = 13; |
| |
| return 0; |
| } |
| |
| |
| 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; |
| } |
| |
| |
| int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| { |
| int i; |
| |
| i = vsnprintf(buf, size, fmt, args); |
| |
| if (likely(i < size)) |
| return i; |
| if (size != 0) |
| return size - 1; |
| return 0; |
| } |
| |
| |
| int scnprintf(char *buf, size_t size, const char *fmt, ...) |
| { |
| va_list args; |
| int i; |
| |
| va_start(args, fmt); |
| i = vscnprintf(buf, size, fmt, args); |
| va_end(args); |
| |
| return i; |
| } |
| |
| |
| |
| #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); |
| } |
| |
| |