forked from KolibriOS/kolibrios
779 lines
21 KiB
C
779 lines
21 KiB
C
#include <ddk.h>
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#include <linux/mm.h>
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#include <drm/drmP.h>
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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#include "intel_drv.h"
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#include <linux/hdmi.h>
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struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags)
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{
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struct file *filep;
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int count;
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filep = __builtin_malloc(sizeof(*filep));
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if(unlikely(filep == NULL))
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return ERR_PTR(-ENOMEM);
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count = size / PAGE_SIZE;
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filep->pages = kzalloc(sizeof(struct page *) * count, 0);
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if(unlikely(filep->pages == NULL))
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{
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kfree(filep);
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return ERR_PTR(-ENOMEM);
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};
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filep->count = count;
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filep->allocated = 0;
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filep->vma = NULL;
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// printf("%s file %p pages %p count %d\n",
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// __FUNCTION__,filep, filep->pages, count);
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return filep;
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}
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struct page *shmem_read_mapping_page_gfp(struct file *filep,
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pgoff_t index, gfp_t gfp)
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{
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struct page *page;
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if(unlikely(index >= filep->count))
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return ERR_PTR(-EINVAL);
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page = filep->pages[index];
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if(unlikely(page == NULL))
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{
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page = (struct page *)AllocPage();
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if(unlikely(page == NULL))
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return ERR_PTR(-ENOMEM);
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filep->pages[index] = page;
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// printf("file %p index %d page %x\n", filep, index, page);
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// delay(1);
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};
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return page;
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};
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unsigned long vm_mmap(struct file *file, unsigned long addr,
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unsigned long len, unsigned long prot,
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unsigned long flag, unsigned long offset)
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{
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char *mem, *ptr;
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int i;
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if (unlikely(offset + PAGE_ALIGN(len) < offset))
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return -EINVAL;
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if (unlikely(offset & ~PAGE_MASK))
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return -EINVAL;
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mem = UserAlloc(len);
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if(unlikely(mem == NULL))
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return -ENOMEM;
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for(i = offset, ptr = mem; i < offset+len; i+= 4096, ptr+= 4096)
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{
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struct page *page;
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page = shmem_read_mapping_page_gfp(file, i/PAGE_SIZE,0);
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if (unlikely(IS_ERR(page)))
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goto err;
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MapPage(ptr, (addr_t)page, PG_SHARED|PG_UW);
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}
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return (unsigned long)mem;
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err:
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UserFree(mem);
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return -ENOMEM;
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};
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void shmem_file_delete(struct file *filep)
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{
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// printf("%s file %p pages %p count %d\n",
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// __FUNCTION__, filep, filep->pages, filep->count);
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if(filep->pages)
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kfree(filep->pages);
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}
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static void *check_bytes8(const u8 *start, u8 value, unsigned int bytes)
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{
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while (bytes) {
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if (*start != value)
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return (void *)start;
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start++;
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bytes--;
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}
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return NULL;
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}
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/**
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* memchr_inv - Find an unmatching character in an area of memory.
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* @start: The memory area
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* @c: Find a character other than c
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* @bytes: The size of the area.
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*
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* returns the address of the first character other than @c, or %NULL
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* if the whole buffer contains just @c.
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*/
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void *memchr_inv(const void *start, int c, size_t bytes)
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{
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u8 value = c;
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u64 value64;
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unsigned int words, prefix;
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if (bytes <= 16)
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return check_bytes8(start, value, bytes);
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value64 = value;
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#if defined(ARCH_HAS_FAST_MULTIPLIER) && BITS_PER_LONG == 64
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value64 *= 0x0101010101010101;
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#elif defined(ARCH_HAS_FAST_MULTIPLIER)
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value64 *= 0x01010101;
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value64 |= value64 << 32;
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#else
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value64 |= value64 << 8;
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value64 |= value64 << 16;
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value64 |= value64 << 32;
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#endif
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prefix = (unsigned long)start % 8;
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if (prefix) {
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u8 *r;
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prefix = 8 - prefix;
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r = check_bytes8(start, value, prefix);
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if (r)
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return r;
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start += prefix;
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bytes -= prefix;
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}
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words = bytes / 8;
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while (words) {
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if (*(u64 *)start != value64)
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return check_bytes8(start, value, 8);
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start += 8;
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words--;
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}
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return check_bytes8(start, value, bytes % 8);
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}
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int dma_map_sg(struct device *dev, struct scatterlist *sglist,
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int nelems, int dir)
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{
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struct scatterlist *s;
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int i;
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for_each_sg(sglist, s, nelems, i) {
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s->dma_address = (dma_addr_t)sg_phys(s);
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#ifdef CONFIG_NEED_SG_DMA_LENGTH
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s->dma_length = s->length;
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#endif
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}
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return nelems;
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}
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#define _U 0x01 /* upper */
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#define _L 0x02 /* lower */
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#define _D 0x04 /* digit */
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#define _C 0x08 /* cntrl */
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#define _P 0x10 /* punct */
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#define _S 0x20 /* white space (space/lf/tab) */
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#define _X 0x40 /* hex digit */
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#define _SP 0x80 /* hard space (0x20) */
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extern const unsigned char _ctype[];
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#define __ismask(x) (_ctype[(int)(unsigned char)(x)])
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#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
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#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
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#define iscntrl(c) ((__ismask(c)&(_C)) != 0)
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#define isdigit(c) ((__ismask(c)&(_D)) != 0)
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#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
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#define islower(c) ((__ismask(c)&(_L)) != 0)
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#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
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#define ispunct(c) ((__ismask(c)&(_P)) != 0)
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/* Note: isspace() must return false for %NUL-terminator */
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#define isspace(c) ((__ismask(c)&(_S)) != 0)
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#define isupper(c) ((__ismask(c)&(_U)) != 0)
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#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)
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#define isascii(c) (((unsigned char)(c))<=0x7f)
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#define toascii(c) (((unsigned char)(c))&0x7f)
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static inline unsigned char __tolower(unsigned char c)
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{
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if (isupper(c))
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c -= 'A'-'a';
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return c;
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}
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static inline unsigned char __toupper(unsigned char c)
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{
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if (islower(c))
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c -= 'a'-'A';
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return c;
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}
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#define tolower(c) __tolower(c)
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#define toupper(c) __toupper(c)
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/*
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* Fast implementation of tolower() for internal usage. Do not use in your
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* code.
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*/
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static inline char _tolower(const char c)
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{
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return c | 0x20;
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}
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//const char hex_asc[] = "0123456789abcdef";
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/**
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* hex_to_bin - convert a hex digit to its real value
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* @ch: ascii character represents hex digit
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*
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* hex_to_bin() converts one hex digit to its actual value or -1 in case of bad
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* input.
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*/
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int hex_to_bin(char ch)
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{
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if ((ch >= '0') && (ch <= '9'))
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return ch - '0';
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ch = tolower(ch);
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if ((ch >= 'a') && (ch <= 'f'))
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return ch - 'a' + 10;
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return -1;
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}
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EXPORT_SYMBOL(hex_to_bin);
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/**
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* hex2bin - convert an ascii hexadecimal string to its binary representation
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* @dst: binary result
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* @src: ascii hexadecimal string
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* @count: result length
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*
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* Return 0 on success, -1 in case of bad input.
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*/
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int hex2bin(u8 *dst, const char *src, size_t count)
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{
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while (count--) {
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int hi = hex_to_bin(*src++);
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int lo = hex_to_bin(*src++);
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if ((hi < 0) || (lo < 0))
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return -1;
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*dst++ = (hi << 4) | lo;
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}
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return 0;
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}
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EXPORT_SYMBOL(hex2bin);
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/**
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* hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
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* @buf: data blob to dump
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* @len: number of bytes in the @buf
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* @rowsize: number of bytes to print per line; must be 16 or 32
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* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
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* @linebuf: where to put the converted data
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* @linebuflen: total size of @linebuf, including space for terminating NUL
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* @ascii: include ASCII after the hex output
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*
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* hex_dump_to_buffer() works on one "line" of output at a time, i.e.,
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* 16 or 32 bytes of input data converted to hex + ASCII output.
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*
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* Given a buffer of u8 data, hex_dump_to_buffer() converts the input data
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* to a hex + ASCII dump at the supplied memory location.
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* The converted output is always NUL-terminated.
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*
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* E.g.:
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* hex_dump_to_buffer(frame->data, frame->len, 16, 1,
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* linebuf, sizeof(linebuf), true);
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*
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* example output buffer:
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* 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
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*/
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void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
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int groupsize, char *linebuf, size_t linebuflen,
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bool ascii)
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{
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const u8 *ptr = buf;
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u8 ch;
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int j, lx = 0;
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int ascii_column;
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if (rowsize != 16 && rowsize != 32)
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rowsize = 16;
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if (!len)
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goto nil;
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if (len > rowsize) /* limit to one line at a time */
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len = rowsize;
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if ((len % groupsize) != 0) /* no mixed size output */
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groupsize = 1;
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switch (groupsize) {
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case 8: {
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const u64 *ptr8 = buf;
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int ngroups = len / groupsize;
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for (j = 0; j < ngroups; j++)
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lx += scnprintf(linebuf + lx, linebuflen - lx,
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"%s%16.16llx", j ? " " : "",
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(unsigned long long)*(ptr8 + j));
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ascii_column = 17 * ngroups + 2;
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break;
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}
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case 4: {
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const u32 *ptr4 = buf;
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int ngroups = len / groupsize;
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for (j = 0; j < ngroups; j++)
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lx += scnprintf(linebuf + lx, linebuflen - lx,
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"%s%8.8x", j ? " " : "", *(ptr4 + j));
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ascii_column = 9 * ngroups + 2;
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break;
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}
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case 2: {
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const u16 *ptr2 = buf;
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int ngroups = len / groupsize;
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for (j = 0; j < ngroups; j++)
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lx += scnprintf(linebuf + lx, linebuflen - lx,
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"%s%4.4x", j ? " " : "", *(ptr2 + j));
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ascii_column = 5 * ngroups + 2;
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break;
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}
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default:
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for (j = 0; (j < len) && (lx + 3) <= linebuflen; j++) {
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ch = ptr[j];
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linebuf[lx++] = hex_asc_hi(ch);
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linebuf[lx++] = hex_asc_lo(ch);
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linebuf[lx++] = ' ';
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}
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if (j)
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lx--;
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ascii_column = 3 * rowsize + 2;
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break;
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}
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if (!ascii)
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goto nil;
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while (lx < (linebuflen - 1) && lx < (ascii_column - 1))
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linebuf[lx++] = ' ';
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for (j = 0; (j < len) && (lx + 2) < linebuflen; j++) {
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ch = ptr[j];
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linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';
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}
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nil:
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linebuf[lx++] = '\0';
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}
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/**
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* print_hex_dump - print a text hex dump to syslog for a binary blob of data
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* @level: kernel log level (e.g. KERN_DEBUG)
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* @prefix_str: string to prefix each line with;
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* caller supplies trailing spaces for alignment if desired
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* @prefix_type: controls whether prefix of an offset, address, or none
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* is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)
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* @rowsize: number of bytes to print per line; must be 16 or 32
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* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
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* @buf: data blob to dump
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* @len: number of bytes in the @buf
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* @ascii: include ASCII after the hex output
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*
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* Given a buffer of u8 data, print_hex_dump() prints a hex + ASCII dump
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* to the kernel log at the specified kernel log level, with an optional
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* leading prefix.
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*
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* print_hex_dump() works on one "line" of output at a time, i.e.,
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* 16 or 32 bytes of input data converted to hex + ASCII output.
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* print_hex_dump() iterates over the entire input @buf, breaking it into
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* "line size" chunks to format and print.
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*
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* E.g.:
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* print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS,
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* 16, 1, frame->data, frame->len, true);
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*
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* Example output using %DUMP_PREFIX_OFFSET and 1-byte mode:
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* 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
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* Example output using %DUMP_PREFIX_ADDRESS and 4-byte mode:
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* ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c pqrstuvwxyz{|}~.
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*/
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void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
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int rowsize, int groupsize,
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const void *buf, size_t len, bool ascii)
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{
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const u8 *ptr = buf;
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int i, linelen, remaining = len;
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unsigned char linebuf[32 * 3 + 2 + 32 + 1];
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if (rowsize != 16 && rowsize != 32)
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rowsize = 16;
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for (i = 0; i < len; i += rowsize) {
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linelen = min(remaining, rowsize);
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remaining -= rowsize;
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hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
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linebuf, sizeof(linebuf), ascii);
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switch (prefix_type) {
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case DUMP_PREFIX_ADDRESS:
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printk("%s%s%p: %s\n",
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level, prefix_str, ptr + i, linebuf);
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break;
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case DUMP_PREFIX_OFFSET:
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printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf);
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break;
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default:
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printk("%s%s%s\n", level, prefix_str, linebuf);
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break;
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}
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}
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}
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void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
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const void *buf, size_t len)
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{
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print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,
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buf, len, true);
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}
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void *kmemdup(const void *src, size_t len, gfp_t gfp)
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{
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void *p;
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p = kmalloc(len, gfp);
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if (p)
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memcpy(p, src, len);
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return p;
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}
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#define KMAP_MAX 256
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static struct mutex kmap_mutex;
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static struct page* kmap_table[KMAP_MAX];
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static int kmap_av;
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static int kmap_first;
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static void* kmap_base;
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int kmap_init()
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{
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kmap_base = AllocKernelSpace(KMAP_MAX*4096);
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if(kmap_base == NULL)
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return -1;
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kmap_av = KMAP_MAX;
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MutexInit(&kmap_mutex);
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return 0;
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};
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void *kmap(struct page *page)
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{
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void *vaddr = NULL;
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int i;
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do
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{
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MutexLock(&kmap_mutex);
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if(kmap_av != 0)
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{
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for(i = kmap_first; i < KMAP_MAX; i++)
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{
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if(kmap_table[i] == NULL)
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{
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kmap_av--;
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kmap_first = i;
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kmap_table[i] = page;
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vaddr = kmap_base + (i<<12);
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MapPage(vaddr,(addr_t)page,3);
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break;
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};
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};
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};
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MutexUnlock(&kmap_mutex);
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}while(vaddr == NULL);
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return vaddr;
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};
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void *kmap_atomic(struct page *page) __attribute__ ((alias ("kmap")));
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void kunmap(struct page *page)
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{
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void *vaddr;
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int i;
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|
|
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);
|
|
}
|
|
|
|
|
|
|