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path: root/linux-core/drm_drawable.c
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Diffstat (limited to 'linux-core/drm_drawable.c')
-rw-r--r--linux-core/drm_drawable.c213
1 files changed, 42 insertions, 171 deletions
diff --git a/linux-core/drm_drawable.c b/linux-core/drm_drawable.c
index 0817e321..d599430b 100644
--- a/linux-core/drm_drawable.c
+++ b/linux-core/drm_drawable.c
@@ -44,82 +44,38 @@ int drm_adddraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
unsigned long irqflags;
- int i, j;
- u32 *bitfield = dev->drw_bitfield;
- unsigned int bitfield_length = dev->drw_bitfield_length;
- drm_drawable_info_t **info = dev->drw_info;
- unsigned int info_length = dev->drw_info_length;
+ struct drm_drawable_list *draw_info;
drm_draw_t draw;
-
- for (i = 0, j = 0; i < bitfield_length; i++) {
- if (bitfield[i] == ~0)
- continue;
-
- for (; j < 8 * sizeof(*bitfield); j++)
- if (!(bitfield[i] & (1 << j)))
- goto done;
+ int new_id = 0;
+ int ret;
+
+ draw_info = drm_calloc(1, sizeof(struct drm_drawable_list), DRM_MEM_BUFS);
+ if (!draw_info)
+ return -ENOMEM;
+
+again:
+ if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) {
+ DRM_ERROR("Out of memory expanding drawable idr\n");
+ drm_free(draw_info, sizeof(struct drm_drawable_list), DRM_MEM_BUFS);
+ return -ENOMEM;
}
-done:
-
- if (i == bitfield_length) {
- bitfield_length++;
-
- bitfield = drm_alloc(bitfield_length * sizeof(*bitfield),
- DRM_MEM_BUFS);
-
- if (!bitfield) {
- DRM_ERROR("Failed to allocate new drawable bitfield\n");
- return DRM_ERR(ENOMEM);
- }
-
- if (8 * sizeof(*bitfield) * bitfield_length > info_length) {
- info_length += 8 * sizeof(*bitfield);
-
- info = drm_alloc(info_length * sizeof(*info),
- DRM_MEM_BUFS);
-
- if (!info) {
- DRM_ERROR("Failed to allocate new drawable info"
- " array\n");
-
- drm_free(bitfield,
- bitfield_length * sizeof(*bitfield),
- DRM_MEM_BUFS);
- return DRM_ERR(ENOMEM);
- }
- }
-
- bitfield[i] = 0;
- }
-
- draw.handle = i * 8 * sizeof(*bitfield) + j + 1;
- DRM_DEBUG("%d\n", draw.handle);
spin_lock_irqsave(&dev->drw_lock, irqflags);
-
- bitfield[i] |= 1 << j;
- info[draw.handle - 1] = NULL;
-
- if (bitfield != dev->drw_bitfield) {
- memcpy(bitfield, dev->drw_bitfield, dev->drw_bitfield_length *
- sizeof(*bitfield));
- drm_free(dev->drw_bitfield, sizeof(*bitfield) *
- dev->drw_bitfield_length, DRM_MEM_BUFS);
- dev->drw_bitfield = bitfield;
- dev->drw_bitfield_length = bitfield_length;
+ ret = idr_get_new_above(&dev->drw_idr, draw_info, 1, &new_id);
+ if (ret == -EAGAIN) {
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+ goto again;
}
- if (info != dev->drw_info) {
- memcpy(info, dev->drw_info, dev->drw_info_length *
- sizeof(*info));
- drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length,
- DRM_MEM_BUFS);
- dev->drw_info = info;
- dev->drw_info_length = info_length;
- }
+ list_add(&draw_info->head, &dev->drwlist);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+ draw_info->id = new_id;
+ draw.handle = new_id;
+
+ DRM_DEBUG("%d\n", draw.handle);
+
DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw));
return 0;
@@ -132,87 +88,25 @@ int drm_rmdraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_draw_t draw;
- int id, idx;
- unsigned int shift;
unsigned long irqflags;
- u32 *bitfield = dev->drw_bitfield;
- unsigned int bitfield_length = dev->drw_bitfield_length;
- drm_drawable_info_t **info = dev->drw_info;
- unsigned int info_length = dev->drw_info_length;
+ struct drm_drawable_list *draw_info;
DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data,
sizeof(draw));
- id = draw.handle - 1;
- idx = id / (8 * sizeof(*bitfield));
- shift = id % (8 * sizeof(*bitfield));
-
- if (idx < 0 || idx >= bitfield_length ||
- !(bitfield[idx] & (1 << shift))) {
+ draw_info = idr_find(&dev->drw_idr, draw.handle);
+ if (!draw_info) {
DRM_DEBUG("No such drawable %d\n", draw.handle);
- return 0;
+ return -EINVAL;
}
spin_lock_irqsave(&dev->drw_lock, irqflags);
- bitfield[idx] &= ~(1 << shift);
+ list_del(&draw_info->head);
+ idr_remove(&dev->drw_idr, draw.handle);
+ drm_free(draw_info, sizeof(struct drm_drawable_list), DRM_MEM_BUFS);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
-
- if (info[id]) {
- drm_free(info[id]->rects, info[id]->num_rects *
- sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
- drm_free(info[id], sizeof(**info), DRM_MEM_BUFS);
- }
-
- /* Can we shrink the arrays? */
- if (idx == bitfield_length - 1) {
- while (idx >= 0 && !bitfield[idx])
- --idx;
-
- bitfield_length = idx + 1;
-
- if (idx != id / (8 * sizeof(*bitfield)))
- bitfield = drm_alloc(bitfield_length *
- sizeof(*bitfield), DRM_MEM_BUFS);
-
- if (!bitfield && bitfield_length) {
- bitfield = dev->drw_bitfield;
- bitfield_length = dev->drw_bitfield_length;
- }
- }
-
- if (bitfield != dev->drw_bitfield) {
- info_length = 8 * sizeof(*bitfield) * bitfield_length;
-
- info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS);
-
- if (!info && info_length) {
- info = dev->drw_info;
- info_length = dev->drw_info_length;
- }
-
- spin_lock_irqsave(&dev->drw_lock, irqflags);
-
- memcpy(bitfield, dev->drw_bitfield, bitfield_length *
- sizeof(*bitfield));
- drm_free(dev->drw_bitfield, sizeof(*bitfield) *
- dev->drw_bitfield_length, DRM_MEM_BUFS);
- dev->drw_bitfield = bitfield;
- dev->drw_bitfield_length = bitfield_length;
-
- if (info != dev->drw_info) {
- memcpy(info, dev->drw_info, info_length *
- sizeof(*info));
- drm_free(dev->drw_info, sizeof(*info) *
- dev->drw_info_length, DRM_MEM_BUFS);
- dev->drw_info = info;
- dev->drw_info_length = info_length;
- }
-
- spin_unlock_irqrestore(&dev->drw_lock, irqflags);
- }
-
DRM_DEBUG("%d\n", draw.handle);
return 0;
}
@@ -220,36 +114,22 @@ int drm_rmdraw(DRM_IOCTL_ARGS)
int drm_update_drawable_info(DRM_IOCTL_ARGS) {
DRM_DEVICE;
drm_update_draw_t update;
- unsigned int id, idx, shift, bitfield_length = dev->drw_bitfield_length;
- u32 *bitfield = dev->drw_bitfield;
unsigned long irqflags;
drm_drawable_info_t *info;
drm_clip_rect_t *rects;
+ struct drm_drawable_list *draw_info;
int err;
DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data,
sizeof(update));
- id = update.handle - 1;
- idx = id / (8 * sizeof(*bitfield));
- shift = id % (8 * sizeof(*bitfield));
-
- if (idx < 0 || idx >= bitfield_length ||
- !(bitfield[idx] & (1 << shift))) {
+ draw_info = idr_find(&dev->drw_idr, update.handle);
+ if (!draw_info) {
DRM_ERROR("No such drawable %d\n", update.handle);
return DRM_ERR(EINVAL);
}
- info = dev->drw_info[id];
-
- if (!info) {
- info = drm_calloc(1, sizeof(drm_drawable_info_t), DRM_MEM_BUFS);
-
- if (!info) {
- DRM_ERROR("Failed to allocate drawable info memory\n");
- return DRM_ERR(ENOMEM);
- }
- }
+ info = &draw_info->info;
switch (update.type) {
case DRM_DRAWABLE_CLIPRECTS:
@@ -284,12 +164,11 @@ int drm_update_drawable_info(DRM_IOCTL_ARGS) {
info->rects = rects;
info->num_rects = update.num;
- dev->drw_info[id] = info;
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
DRM_DEBUG("Updated %d cliprects for drawable %d\n",
- info->num_rects, id);
+ info->num_rects, update.handle);
break;
default:
DRM_ERROR("Invalid update type %d\n", update.type);
@@ -299,11 +178,9 @@ int drm_update_drawable_info(DRM_IOCTL_ARGS) {
return 0;
error:
- if (!dev->drw_info[id])
- drm_free(info, sizeof(*info), DRM_MEM_BUFS);
- else if (rects != dev->drw_info[id]->rects)
- drm_free(rects, update.num *
- sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
+ if (rects != info->rects)
+ drm_free(rects, update.num * sizeof(drm_clip_rect_t),
+ DRM_MEM_BUFS);
return err;
}
@@ -312,19 +189,13 @@ error:
* Caller must hold the drawable spinlock!
*/
drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) {
- u32 *bitfield = dev->drw_bitfield;
- unsigned int idx, shift;
-
- id--;
- idx = id / (8 * sizeof(*bitfield));
- shift = id % (8 * sizeof(*bitfield));
-
- if (idx < 0 || idx >= dev->drw_bitfield_length ||
- !(bitfield[idx] & (1 << shift))) {
+ struct drm_drawable_list *draw_info;
+ draw_info = idr_find(&dev->drw_idr, id);
+ if (!draw_info) {
DRM_DEBUG("No such drawable %d\n", id);
return NULL;
}
- return dev->drw_info[id];
+ return &draw_info->info;
}
EXPORT_SYMBOL(drm_get_drawable_info);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 20:30:18 +0000