From ca01ed45e8dee7970c6eefb528b7576ce6717459 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jos=C3=A9=20Fonseca?= Date: Fri, 25 Jan 2008 18:38:25 +0900 Subject: [PATCH] gallium: Make mm buffer manager more portable. --- src/mesa/pipe/pipebuffer/pb_bufmgr_mm.c | 320 +++++++++++++++++++++++- 1 file changed, 309 insertions(+), 11 deletions(-) diff --git a/src/mesa/pipe/pipebuffer/pb_bufmgr_mm.c b/src/mesa/pipe/pipebuffer/pb_bufmgr_mm.c index f456b571d98..038406e953a 100644 --- a/src/mesa/pipe/pipebuffer/pb_bufmgr_mm.c +++ b/src/mesa/pipe/pipebuffer/pb_bufmgr_mm.c @@ -1,6 +1,7 @@ /************************************************************************** * * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas. + * Copyright 1999 Wittawat Yamwong * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a @@ -34,15 +35,12 @@ #include -#include -#include -#include "main/imports.h" -#include "glapi/glthread.h" -#include "main/mm.h" #include "linked_list.h" #include "p_defines.h" +#include "p_thread.h" +#include "p_util.h" #include "pb_buffer.h" #include "pb_bufmgr.h" @@ -53,6 +51,306 @@ #define SUPER(__derived) (&(__derived)->base) +struct mem_block +{ + struct mem_block *next, *prev; + struct mem_block *next_free, *prev_free; + struct mem_block *heap; + int ofs, size; + unsigned int free:1; + unsigned int reserved:1; +}; + + +#ifdef DEBUG +/** + * For debugging purposes. + */ +static void +mmDumpMemInfo(const struct mem_block *heap) +{ + fprintf(stderr, "Memory heap %p:\n", (void *)heap); + if (heap == 0) { + fprintf(stderr, " heap == 0\n"); + } else { + const struct mem_block *p; + + for(p = heap->next; p != heap; p = p->next) { + fprintf(stderr, " Offset:%08x, Size:%08x, %c%c\n",p->ofs,p->size, + p->free ? 'F':'.', + p->reserved ? 'R':'.'); + } + + fprintf(stderr, "\nFree list:\n"); + + for(p = heap->next_free; p != heap; p = p->next_free) { + fprintf(stderr, " FREE Offset:%08x, Size:%08x, %c%c\n",p->ofs,p->size, + p->free ? 'F':'.', + p->reserved ? 'R':'.'); + } + + } + fprintf(stderr, "End of memory blocks\n"); +} +#endif + + +/** + * input: total size in bytes + * return: a heap pointer if OK, NULL if error + */ +static struct mem_block * +mmInit(int ofs, int size) +{ + struct mem_block *heap, *block; + + if (size <= 0) + return NULL; + + heap = CALLOC_STRUCT(mem_block); + if (!heap) + return NULL; + + block = CALLOC_STRUCT(mem_block); + if (!block) { + FREE(heap); + return NULL; + } + + heap->next = block; + heap->prev = block; + heap->next_free = block; + heap->prev_free = block; + + block->heap = heap; + block->next = heap; + block->prev = heap; + block->next_free = heap; + block->prev_free = heap; + + block->ofs = ofs; + block->size = size; + block->free = 1; + + return heap; +} + + +static struct mem_block * +SliceBlock(struct mem_block *p, + int startofs, int size, + int reserved, int alignment) +{ + struct mem_block *newblock; + + /* break left [p, newblock, p->next], then p = newblock */ + if (startofs > p->ofs) { + newblock = CALLOC_STRUCT(mem_block); + if (!newblock) + return NULL; + newblock->ofs = startofs; + newblock->size = p->size - (startofs - p->ofs); + newblock->free = 1; + newblock->heap = p->heap; + + newblock->next = p->next; + newblock->prev = p; + p->next->prev = newblock; + p->next = newblock; + + newblock->next_free = p->next_free; + newblock->prev_free = p; + p->next_free->prev_free = newblock; + p->next_free = newblock; + + p->size -= newblock->size; + p = newblock; + } + + /* break right, also [p, newblock, p->next] */ + if (size < p->size) { + newblock = CALLOC_STRUCT(mem_block); + if (!newblock) + return NULL; + newblock->ofs = startofs + size; + newblock->size = p->size - size; + newblock->free = 1; + newblock->heap = p->heap; + + newblock->next = p->next; + newblock->prev = p; + p->next->prev = newblock; + p->next = newblock; + + newblock->next_free = p->next_free; + newblock->prev_free = p; + p->next_free->prev_free = newblock; + p->next_free = newblock; + + p->size = size; + } + + /* p = middle block */ + p->free = 0; + + /* Remove p from the free list: + */ + p->next_free->prev_free = p->prev_free; + p->prev_free->next_free = p->next_free; + + p->next_free = 0; + p->prev_free = 0; + + p->reserved = reserved; + return p; +} + + +/** + * Allocate 'size' bytes with 2^align2 bytes alignment, + * restrict the search to free memory after 'startSearch' + * depth and back buffers should be in different 4mb banks + * to get better page hits if possible + * input: size = size of block + * align2 = 2^align2 bytes alignment + * startSearch = linear offset from start of heap to begin search + * return: pointer to the allocated block, 0 if error + */ +static struct mem_block * +mmAllocMem(struct mem_block *heap, int size, int align2, int startSearch) +{ + struct mem_block *p; + const int mask = (1 << align2)-1; + int startofs = 0; + int endofs; + + if (!heap || align2 < 0 || size <= 0) + return NULL; + + for (p = heap->next_free; p != heap; p = p->next_free) { + assert(p->free); + + startofs = (p->ofs + mask) & ~mask; + if ( startofs < startSearch ) { + startofs = startSearch; + } + endofs = startofs+size; + if (endofs <= (p->ofs+p->size)) + break; + } + + if (p == heap) + return NULL; + + assert(p->free); + p = SliceBlock(p,startofs,size,0,mask+1); + + return p; +} + + +#if 0 +/** + * Free block starts at offset + * input: pointer to a heap, start offset + * return: pointer to a block + */ +static struct mem_block * +mmFindBlock(struct mem_block *heap, int start) +{ + struct mem_block *p; + + for (p = heap->next; p != heap; p = p->next) { + if (p->ofs == start) + return p; + } + + return NULL; +} +#endif + + +static INLINE int +Join2Blocks(struct mem_block *p) +{ + /* XXX there should be some assertions here */ + + /* NOTE: heap->free == 0 */ + + if (p->free && p->next->free) { + struct mem_block *q = p->next; + + assert(p->ofs + p->size == q->ofs); + p->size += q->size; + + p->next = q->next; + q->next->prev = p; + + q->next_free->prev_free = q->prev_free; + q->prev_free->next_free = q->next_free; + + FREE(q); + return 1; + } + return 0; +} + + +/** + * Free block starts at offset + * input: pointer to a block + * return: 0 if OK, -1 if error + */ +static int +mmFreeMem(struct mem_block *b) +{ + if (!b) + return 0; + + if (b->free) { + fprintf(stderr, "block already free\n"); + return -1; + } + if (b->reserved) { + fprintf(stderr, "block is reserved\n"); + return -1; + } + + b->free = 1; + b->next_free = b->heap->next_free; + b->prev_free = b->heap; + b->next_free->prev_free = b; + b->prev_free->next_free = b; + + Join2Blocks(b); + if (b->prev != b->heap) + Join2Blocks(b->prev); + + return 0; +} + + +/** + * destroy MM + */ +static void +mmDestroy(struct mem_block *heap) +{ + struct mem_block *p; + + if (!heap) + return; + + for (p = heap->next; p != heap; ) { + struct mem_block *next = p->next; + FREE(p); + p = next; + } + + FREE(heap); +} + + struct mm_pb_manager { struct pb_manager base; @@ -103,7 +401,7 @@ mm_buffer_destroy(struct pb_buffer *buf) _glthread_LOCK_MUTEX(mm->mutex); mmFreeMem(mm_buf->block); - free(buf); + FREE(buf); _glthread_UNLOCK_MUTEX(mm->mutex); } @@ -156,7 +454,7 @@ mm_bufmgr_create_buffer(struct pb_manager *mgr, _glthread_LOCK_MUTEX(mm->mutex); - mm_buf = (struct mm_buffer *)malloc(sizeof(*mm_buf)); + mm_buf = CALLOC_STRUCT(mm_buffer); if (!mm_buf) { _glthread_UNLOCK_MUTEX(mm->mutex); return NULL; @@ -176,7 +474,7 @@ mm_bufmgr_create_buffer(struct pb_manager *mgr, mm_buf->block = mmAllocMem(mm->heap, size, mm->align2, 0); if(!mm_buf->block) { assert(0); - free(mm_buf); + FREE(mm_buf); _glthread_UNLOCK_MUTEX(mm->mutex); return NULL; } @@ -205,7 +503,7 @@ mm_bufmgr_destroy(struct pb_manager *mgr) _glthread_UNLOCK_MUTEX(mm->mutex); - free(mgr); + FREE(mgr); } @@ -218,7 +516,7 @@ mm_bufmgr_create_from_buffer(struct pb_buffer *buffer, if(!buffer) return NULL; - mm = (struct mm_pb_manager *)calloc(1, sizeof(*mm)); + mm = CALLOC_STRUCT(mm_pb_manager); if (!mm) return NULL; @@ -250,7 +548,7 @@ if(mm->heap) if(mm->map) pb_unmap(mm->buffer); if(mm) - free(mm); + FREE(mm); return NULL; } -- 2.30.2