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-rw-r--r--libdrm/xf86drm.c135
-rw-r--r--libdrm/xf86mm.h105
2 files changed, 239 insertions, 1 deletions
diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index 3731ee12..6de6c06f 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -65,6 +65,8 @@
# define _DRM_FREE free
# include "drm.h"
#endif
+#include "xf86mm.h"
+
/* Not all systems have MAP_FAILED defined */
#ifndef MAP_FAILED
@@ -2384,7 +2386,7 @@ int drmTTMCreate(int fd, drmTTM *ttm, unsigned long size, unsigned flags)
int drmTTMDestroy(int fd, const drmTTM *ttm)
{
- drm_ttm_arg_t arg;
+ drm_ttm_arg_t arg;
arg.op = drm_ttm_destroy;
arg.handle = ttm->handle;
@@ -2425,4 +2427,135 @@ drm_handle_t drmTTMMapHandle(int fd, const drmTTM *ttm)
(void) fd;
return ttm->user_token;
}
+
+static int drmAdjustListNodes(DrmBufList *list)
+{
+ DrmBufNode *node;
+ DrmMMListHead *l;
+ int ret = 0;
+
+ while(list->numCurrent < list->numTarget) {
+ node = (DrmBufNode *) malloc(sizeof(*node));
+ if (!node) {
+ ret = -ENOMEM;
+ break;
+ }
+ list->numCurrent++;
+ DRMLISTADD(&node->head, &list->free);
+ }
+
+ while(list->numCurrent > list->numTarget) {
+ l = list->free.next;
+ if (l == &list->free)
+ break;
+ DRMLISTDEL(l);
+ node = DRMLISTENTRY(DrmBufNode, l, head);
+ free(node);
+ list->numCurrent--;
+ }
+ return ret;
+}
+
+static void drmFreeList(DrmBufList *list)
+{
+ DrmBufNode *node;
+ DrmMMListHead *l;
+ int ret = 0;
+
+ l = list->list.next;
+ while(l != &list->list) {
+ DRMLISTDEL(l);
+ node = DRMLISTENTRY(DrmBufNode, l, head);
+ free(node);
+ l = list->free.next;
+ list->numCurrent--;
+ list->numOnList--;
+ }
+
+ l = list->free.next;
+ while(l != &list->free) {
+ DRMLISTDEL(l);
+ node = DRMLISTENTRY(DrmBufNode, l, head);
+ free(node);
+ l = list->free.next;
+ list->numCurrent--;
+ }
+}
+
+int drmResetList(DrmBufList *list) {
+
+ DrmMMListHead *l;
+ int ret;
+
+ ret = drmAdjustListNodes(list);
+ if (ret)
+ return ret;
+
+ l = list->list.next;
+ while(l != &list->list) {
+ DRMLISTDEL(l);
+ DRMLISTADD(l, &list->free);
+ list->numOnList--;
+ }
+ return drmAdjustListNodes(list);
+}
+
+static int drmAddListItem(DrmBufList *list, DrmBuf *item, drm_bo_arg_t *arg)
+{
+ DrmBufNode *node;
+ DrmMMListHead *l;
+
+ l = list->free.next;
+ if (l == &list->free) {
+ node = (DrmBufNode *) malloc(sizeof(*node));
+ if (!node) {
+ return -ENOMEM;
+ }
+ list->numCurrent++;
+ } else {
+ DRMLISTDEL(l);
+ node = DRMLISTENTRY(DrmBufNode, l, head);
+ }
+ node->buf = item;
+ DRMLISTADD(&node->head, &list->list);
+ list->numOnList++;
+ return 0;
+}
+
+int drmCreateBufList(int numTarget, DrmBufList *list)
+{
+ DRMINITLISTHEAD(&list->list);
+ DRMINITLISTHEAD(&list->free);
+ list->numTarget = numTarget;
+ list->numCurrent = 0;
+ list->numOnList = 0;
+ return drmAdjustListNodes(list);
+}
+
+/*
+ * Prepare list for IOCTL submission.
+ */
+
+static drm_bo_arg_t *drmPrepareList(DrmBufList *list)
+{
+ DrmMMListHead *cur, *next;
+ DrmBufNode *first, *curNode, *nextNode;
+
+ cur = list->list.next;
+ if (cur == &list->list)
+ return NULL;
+
+ first = DRMLISTENTRY(DrmBufNode, cur, head);
+ curNode = DRMLISTENTRY(DrmBufNode, cur, head);
+
+ for (next = cur->next; next != &list->list;
+ cur = next, next = cur->next) {
+ nextNode = DRMLISTENTRY(DrmBufNode, next, head);
+ curNode->bo_arg.req.next = ((unsigned long) &nextNode->bo_arg.req);
+ curNode = nextNode;
+ }
+ curNode->bo_arg.req.next = 0;
+ return &first->bo_arg;
+}
+
#endif
diff --git a/libdrm/xf86mm.h b/libdrm/xf86mm.h
new file mode 100644
index 00000000..5fb78723
--- /dev/null
+++ b/libdrm/xf86mm.h
@@ -0,0 +1,105 @@
+/**************************************************************************
+ *
+ * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND. USA.
+ * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ *
+ **************************************************************************/
+
+#ifndef _XF86MM_H_
+#define _XF86MM_H_
+#include <stddef.h>
+
+
+/*
+ * List macros heavily inspired by the Linux kernel
+ * list handling. No list looping yet.
+ */
+
+typedef struct _drmMMListHead
+{
+ struct _drmMMListHead *prev;
+ struct _drmMMListHead *next;
+} DrmMMListHead;
+
+#define DRMINITLISTHEAD(__item) \
+ do{ \
+ (__item)->prev = (__item); \
+ (__item)->next = (__item); \
+ } while (0)
+
+#define DRMLISTADD(__item, __list) \
+ do { \
+ (__item)->prev = (__list); \
+ (__item)->next = (__list)->next; \
+ (__list)->next->prev = (__item); \
+ (__list)->next = (__item); \
+ } while (0)
+
+#define DRMLISTADDTAIL(__item, __list) \
+ do { \
+ (__item)->next = (__list); \
+ (__item)->prev = (__list)->prev; \
+ (__list)->prev->next = (__item); \
+ (__list)->prev = (__item); \
+ } while(0)
+
+#define DRMLISTDEL(__item) \
+ do { \
+ (__item)->prev->next = (__item)->next; \
+ (__item)->next->prev = (__item)->prev; \
+ } while(0)
+
+#define DRMLISTDELINIT(__item) \
+ do { \
+ (__item)->prev->next = (__item)->next; \
+ (__item)->next->prev = (__item)->prev; \
+ (__item)->next = (__item); \
+ (__item)->prev = (__item); \
+ } while(0)
+
+#define DRMLISTENTRY(__type, __item, __field) \
+ ((__type *)(((char *) (__item)) - offsetof(__type, __field)))
+
+
+typedef struct _DrmBuf{
+ unsigned handle;
+} DrmBuf;
+
+
+typedef struct _DrmBufNode {
+ DrmMMListHead head;
+ DrmBuf *buf;
+ drm_bo_arg_t bo_arg;
+} DrmBufNode;
+
+typedef struct _DrmMMBufList {
+ unsigned numTarget;
+ unsigned numCurrent;
+ unsigned numOnList;
+ DrmMMListHead list;
+ DrmMMListHead free;
+} DrmBufList;
+
+
+#endif