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Diffstat (limited to 'drivers/char/drm/sis_ds.c')
-rw-r--r--drivers/char/drm/sis_ds.c301
1 files changed, 301 insertions, 0 deletions
diff --git a/drivers/char/drm/sis_ds.c b/drivers/char/drm/sis_ds.c
new file mode 100644
index 00000000000..e37ed8ce48d
--- /dev/null
+++ b/drivers/char/drm/sis_ds.c
@@ -0,0 +1,301 @@
+/* sis_ds.c -- Private header for Direct Rendering Manager -*- linux-c -*-
+ * Created: Mon Jan 4 10:05:05 1999 by sclin@sis.com.tw
+ *
+ * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Sung-Ching Lin <sclin@sis.com.tw>
+ *
+ */
+
+#include "drmP.h"
+#include "drm.h"
+#include "sis_ds.h"
+
+/* Set Data Structure, not check repeated value
+ * temporarily used
+ */
+
+set_t *setInit(void)
+{
+ int i;
+ set_t *set;
+
+ set = (set_t *)drm_alloc(sizeof(set_t), DRM_MEM_DRIVER);
+ if (set != NULL) {
+ for (i = 0; i < SET_SIZE; i++) {
+ set->list[i].free_next = i + 1;
+ set->list[i].alloc_next = -1;
+ }
+ set->list[SET_SIZE-1].free_next = -1;
+ set->free = 0;
+ set->alloc = -1;
+ set->trace = -1;
+ }
+ return set;
+}
+
+int setAdd(set_t *set, ITEM_TYPE item)
+{
+ int free = set->free;
+
+ if (free != -1) {
+ set->list[free].val = item;
+ set->free = set->list[free].free_next;
+ } else {
+ return 0;
+ }
+
+ set->list[free].alloc_next = set->alloc;
+ set->alloc = free;
+ set->list[free].free_next = -1;
+
+ return 1;
+}
+
+int setDel(set_t *set, ITEM_TYPE item)
+{
+ int alloc = set->alloc;
+ int prev = -1;
+
+ while (alloc != -1) {
+ if (set->list[alloc].val == item) {
+ if (prev != -1)
+ set->list[prev].alloc_next =
+ set->list[alloc].alloc_next;
+ else
+ set->alloc = set->list[alloc].alloc_next;
+ break;
+ }
+ prev = alloc;
+ alloc = set->list[alloc].alloc_next;
+ }
+
+ if (alloc == -1)
+ return 0;
+
+ set->list[alloc].free_next = set->free;
+ set->free = alloc;
+ set->list[alloc].alloc_next = -1;
+
+ return 1;
+}
+
+/* setFirst -> setAdd -> setNext is wrong */
+
+int setFirst(set_t *set, ITEM_TYPE *item)
+{
+ if (set->alloc == -1)
+ return 0;
+
+ *item = set->list[set->alloc].val;
+ set->trace = set->list[set->alloc].alloc_next;
+
+ return 1;
+}
+
+int setNext(set_t *set, ITEM_TYPE *item)
+{
+ if (set->trace == -1)
+ return 0;
+
+ *item = set->list[set->trace].val;
+ set->trace = set->list[set->trace].alloc_next;
+
+ return 1;
+}
+
+int setDestroy(set_t *set)
+{
+ drm_free(set, sizeof(set_t), DRM_MEM_DRIVER);
+
+ return 1;
+}
+
+/*
+ * GLX Hardware Device Driver common code
+ * Copyright (C) 1999 Wittawat Yamwong
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * WITTAWAT YAMWONG, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#define ISFREE(bptr) ((bptr)->free)
+
+memHeap_t *mmInit(int ofs,
+ int size)
+{
+ PMemBlock blocks;
+
+ if (size <= 0)
+ return NULL;
+
+ blocks = (TMemBlock *)drm_calloc(1, sizeof(TMemBlock), DRM_MEM_DRIVER);
+ if (blocks != NULL) {
+ blocks->ofs = ofs;
+ blocks->size = size;
+ blocks->free = 1;
+ return (memHeap_t *)blocks;
+ } else
+ return NULL;
+}
+
+/* Checks if a pointer 'b' is part of the heap 'heap' */
+int mmBlockInHeap(memHeap_t *heap, PMemBlock b)
+{
+ TMemBlock *p;
+
+ if (heap == NULL || b == NULL)
+ return 0;
+
+ p = heap;
+ while (p != NULL && p != b) {
+ p = p->next;
+ }
+ if (p == b)
+ return 1;
+ else
+ return 0;
+}
+
+static TMemBlock* SliceBlock(TMemBlock *p,
+ int startofs, int size,
+ int reserved, int alignment)
+{
+ TMemBlock *newblock;
+
+ /* break left */
+ if (startofs > p->ofs) {
+ newblock = (TMemBlock*) drm_calloc(1, sizeof(TMemBlock),
+ DRM_MEM_DRIVER);
+ newblock->ofs = startofs;
+ newblock->size = p->size - (startofs - p->ofs);
+ newblock->free = 1;
+ newblock->next = p->next;
+ p->size -= newblock->size;
+ p->next = newblock;
+ p = newblock;
+ }
+
+ /* break right */
+ if (size < p->size) {
+ newblock = (TMemBlock*) drm_calloc(1, sizeof(TMemBlock),
+ DRM_MEM_DRIVER);
+ newblock->ofs = startofs + size;
+ newblock->size = p->size - size;
+ newblock->free = 1;
+ newblock->next = p->next;
+ p->size = size;
+ p->next = newblock;
+ }
+
+ /* p = middle block */
+ p->align = alignment;
+ p->free = 0;
+ p->reserved = reserved;
+ return p;
+}
+
+PMemBlock mmAllocMem( memHeap_t *heap, int size, int align2, int startSearch)
+{
+ int mask,startofs, endofs;
+ TMemBlock *p;
+
+ if (heap == NULL || align2 < 0 || size <= 0)
+ return NULL;
+
+ mask = (1 << align2)-1;
+ startofs = 0;
+ p = (TMemBlock *)heap;
+ while (p != NULL) {
+ if (ISFREE(p)) {
+ startofs = (p->ofs + mask) & ~mask;
+ if ( startofs < startSearch ) {
+ startofs = startSearch;
+ }
+ endofs = startofs+size;
+ if (endofs <= (p->ofs+p->size))
+ break;
+ }
+ p = p->next;
+ }
+ if (p == NULL)
+ return NULL;
+ p = SliceBlock(p,startofs,size,0,mask+1);
+ p->heap = heap;
+ return p;
+}
+
+static __inline__ int Join2Blocks(TMemBlock *p)
+{
+ if (p->free && p->next && p->next->free) {
+ TMemBlock *q = p->next;
+ p->size += q->size;
+ p->next = q->next;
+ drm_free(q, sizeof(TMemBlock), DRM_MEM_DRIVER);
+ return 1;
+ }
+ return 0;
+}
+
+int mmFreeMem(PMemBlock b)
+{
+ TMemBlock *p, *prev;
+
+ if (b == NULL)
+ return 0;
+ if (b->heap == NULL)
+ return -1;
+
+ p = b->heap;
+ prev = NULL;
+ while (p != NULL && p != b) {
+ prev = p;
+ p = p->next;
+ }
+ if (p == NULL || p->free || p->reserved)
+ return -1;
+
+ p->free = 1;
+ Join2Blocks(p);
+ if (prev)
+ Join2Blocks(prev);
+ return 0;
+}
+
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