* \param ctx_handle context handle.
*
* Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry
- * in drm_device::context_sareas, while holding the drm_device::struct_mutex
+ * in drm_device::ctx_idr, while holding the drm_device::struct_mutex
* lock.
*/
void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
{
- if (ctx_handle < 0)
- goto failed;
- if (!dev->ctx_bitmap)
- goto failed;
-
- if (ctx_handle < DRM_MAX_CTXBITMAP) {
- mutex_lock(&dev->struct_mutex);
- clear_bit(ctx_handle, dev->ctx_bitmap);
- dev->context_sareas[ctx_handle] = NULL;
- mutex_unlock(&dev->struct_mutex);
- return;
- }
- failed:
- DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle);
- return;
+ mutex_lock(&dev->struct_mutex);
+ idr_remove(&dev->ctx_idr, ctx_handle);
+ mutex_unlock(&dev->struct_mutex);
}
/**
* \param dev DRM device.
* \return (non-negative) context handle on success or a negative number on failure.
*
- * Find the first zero bit in drm_device::ctx_bitmap and (re)allocates
- * drm_device::context_sareas to accommodate the new entry while holding the
+ * Allocate a new idr from drm_device::ctx_idr while holding the
* drm_device::struct_mutex lock.
*/
static int drm_ctxbitmap_next(struct drm_device * dev)
{
- int bit;
-
- if (!dev->ctx_bitmap)
- return -1;
+ int new_id;
+ int ret;
+again:
+ if (idr_pre_get(&dev->ctx_idr, GFP_KERNEL) == 0) {
+ DRM_ERROR("Out of memory expanding drawable idr\n");
+ return -ENOMEM;
+ }
mutex_lock(&dev->struct_mutex);
- bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP);
- if (bit < DRM_MAX_CTXBITMAP) {
- set_bit(bit, dev->ctx_bitmap);
- DRM_DEBUG("drm_ctxbitmap_next bit : %d\n", bit);
- if ((bit + 1) > dev->max_context) {
- dev->max_context = (bit + 1);
- if (dev->context_sareas) {
- struct drm_map **ctx_sareas;
-
- ctx_sareas = drm_realloc(dev->context_sareas,
- (dev->max_context -
- 1) *
- sizeof(*dev->
- context_sareas),
- dev->max_context *
- sizeof(*dev->
- context_sareas),
- DRM_MEM_MAPS);
- if (!ctx_sareas) {
- clear_bit(bit, dev->ctx_bitmap);
- mutex_unlock(&dev->struct_mutex);
- return -1;
- }
- dev->context_sareas = ctx_sareas;
- dev->context_sareas[bit] = NULL;
- } else {
- /* max_context == 1 at this point */
- dev->context_sareas =
- drm_alloc(dev->max_context *
- sizeof(*dev->context_sareas),
- DRM_MEM_MAPS);
- if (!dev->context_sareas) {
- clear_bit(bit, dev->ctx_bitmap);
- mutex_unlock(&dev->struct_mutex);
- return -1;
- }
- dev->context_sareas[bit] = NULL;
- }
- }
+ ret = idr_get_new_above(&dev->ctx_idr, NULL,
+ DRM_RESERVED_CONTEXTS, &new_id);
+ if (ret == -EAGAIN) {
mutex_unlock(&dev->struct_mutex);
- return bit;
+ goto again;
}
mutex_unlock(&dev->struct_mutex);
- return -1;
+ return new_id;
}
/**
*
* \param dev DRM device.
*
- * Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_mutex lock.
+ * Initialise the drm_device::ctx_idr
*/
int drm_ctxbitmap_init(struct drm_device * dev)
{
- int i;
- int temp;
-
- mutex_lock(&dev->struct_mutex);
- dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE,
- DRM_MEM_CTXBITMAP);
- if (dev->ctx_bitmap == NULL) {
- mutex_unlock(&dev->struct_mutex);
- return -ENOMEM;
- }
- memset((void *)dev->ctx_bitmap, 0, PAGE_SIZE);
- dev->context_sareas = NULL;
- dev->max_context = -1;
- mutex_unlock(&dev->struct_mutex);
-
- for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
- temp = drm_ctxbitmap_next(dev);
- DRM_DEBUG("drm_ctxbitmap_init : %d\n", temp);
- }
-
+ idr_init(&dev->ctx_idr);
return 0;
}
*
* \param dev DRM device.
*
- * Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_mutex lock.
+ * Free all idr members using drm_ctx_sarea_free helper function
+ * while holding the drm_device::struct_mutex lock.
*/
void drm_ctxbitmap_cleanup(struct drm_device * dev)
{
mutex_lock(&dev->struct_mutex);
- if (dev->context_sareas)
- drm_free(dev->context_sareas,
- sizeof(*dev->context_sareas) *
- dev->max_context, DRM_MEM_MAPS);
- drm_free((void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP);
+ idr_remove_all(&dev->ctx_idr);
mutex_unlock(&dev->struct_mutex);
}
* \param arg user argument pointing to a drm_ctx_priv_map structure.
* \return zero on success or a negative number on failure.
*
- * Gets the map from drm_device::context_sareas with the handle specified and
+ * Gets the map from drm_device::ctx_idr with the handle specified and
* returns its handle.
*/
int drm_getsareactx(struct inode *inode, struct file *filp,
return -EFAULT;
mutex_lock(&dev->struct_mutex);
- if (dev->max_context < 0
- || request.ctx_id >= (unsigned)dev->max_context) {
+
+ map = idr_find(&dev->ctx_idr, request.ctx_id);
+ if (!map) {
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
- map = dev->context_sareas[request.ctx_id];
mutex_unlock(&dev->struct_mutex);
request.handle = NULL;
* \return zero on success or a negative number on failure.
*
* Searches the mapping specified in \p arg and update the entry in
- * drm_device::context_sareas with it.
+ * drm_device::ctx_idr with it.
*/
int drm_setsareactx(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
map = r_list->map;
if (!map)
goto bad;
- if (dev->max_context < 0)
- goto bad;
- if (request.ctx_id >= (unsigned)dev->max_context)
+
+ if (IS_ERR(idr_replace(&dev->ctx_idr, map, request.ctx_id)))
goto bad;
- dev->context_sareas[request.ctx_id] = map;
+
mutex_unlock(&dev->struct_mutex);
return 0;
}
{
DRM_DEVICE;
unsigned long irqflags;
- int i, j;
- u32 *bitfield = dev->drw_bitfield;
- unsigned int bitfield_length = dev->drw_bitfield_length;
- struct drm_drawable_info **info = dev->drw_info;
- unsigned int info_length = dev->drw_info_length;
struct drm_draw draw;
+ int new_id = 0;
+ int ret;
- 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;
- }
-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;
+again:
+ if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) {
+ DRM_ERROR("Out of memory expanding drawable idr\n");
+ return -ENOMEM;
}
- 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;
- }
-
- 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;
+ ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id);
+ if (ret == -EAGAIN) {
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+ goto again;
}
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+ draw.handle = new_id;
+
+ DRM_DEBUG("%d\n", draw.handle);
+
DRM_COPY_TO_USER_IOCTL((struct drm_draw __user *)data, draw, sizeof(draw));
return 0;
{
DRM_DEVICE;
struct drm_draw draw;
- int id, idx;
- unsigned int shift;
unsigned long irqflags;
- u32 *bitfield = dev->drw_bitfield;
- unsigned int bitfield_length = dev->drw_bitfield_length;
- struct drm_drawable_info **info = dev->drw_info;
- unsigned int info_length = dev->drw_info_length;
DRM_COPY_FROM_USER_IOCTL(draw, (struct drm_draw __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))) {
- DRM_DEBUG("No such drawable %d\n", draw.handle);
- return 0;
- }
-
spin_lock_irqsave(&dev->drw_lock, irqflags);
- bitfield[idx] &= ~(1 << shift);
-
- spin_unlock_irqrestore(&dev->drw_lock, irqflags);
-
- if (info[id]) {
- drm_free(info[id]->rects, info[id]->num_rects *
- sizeof(struct drm_clip_rect), 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;
-
- bitfield = NULL;
-
- if (bitfield_length) {
- if (bitfield_length != dev->drw_bitfield_length)
- bitfield = drm_alloc(bitfield_length *
- sizeof(*bitfield),
- DRM_MEM_BUFS);
-
- if (!bitfield) {
- bitfield = dev->drw_bitfield;
- bitfield_length = dev->drw_bitfield_length;
- }
- }
- }
-
- if (bitfield != dev->drw_bitfield) {
- info_length = 8 * sizeof(*bitfield) * bitfield_length;
-
- if (info_length) {
- info = drm_alloc(info_length * sizeof(*info),
- DRM_MEM_BUFS);
-
- if (!info) {
- info = dev->drw_info;
- info_length = dev->drw_info_length;
- }
- } else
- info = NULL;
-
- spin_lock_irqsave(&dev->drw_lock, irqflags);
-
- if (bitfield)
- 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) {
- if (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;
- }
+ drm_free(drm_get_drawable_info(dev, draw.handle),
+ sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
- spin_unlock_irqrestore(&dev->drw_lock, irqflags);
- }
+ idr_remove(&dev->drw_idr, draw.handle);
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
DRM_DEBUG("%d\n", draw.handle);
return 0;
}
-int drm_update_drawable_info(DRM_IOCTL_ARGS) {
+int drm_update_drawable_info(DRM_IOCTL_ARGS)
+{
DRM_DEVICE;
struct drm_update_draw update;
- unsigned int id, idx, shift;
- u32 *bitfield = dev->drw_bitfield;
- unsigned long irqflags, bitfield_length = dev->drw_bitfield_length;
- struct drm_drawable_info *info;
+ unsigned long irqflags;
struct drm_clip_rect *rects;
+ struct drm_drawable_info *info;
int err;
DRM_COPY_FROM_USER_IOCTL(update, (struct drm_update_draw __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))) {
- DRM_ERROR("No such drawable %d\n", update.handle);
- return DRM_ERR(EINVAL);
- }
-
- info = dev->drw_info[id];
-
+ info = idr_find(&dev->drw_idr, update.handle);
if (!info) {
- info = drm_calloc(1, sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
-
- if (!info) {
- DRM_ERROR("Failed to allocate drawable info memory\n");
- return DRM_ERR(ENOMEM);
+ info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS);
+ if (!info)
+ return -ENOMEM;
+ if (IS_ERR(idr_replace(&dev->drw_idr, info, update.handle))) {
+ DRM_ERROR("No such drawable %d\n", update.handle);
+ drm_free(info, sizeof(*info), DRM_MEM_BUFS);
+ return -EINVAL;
}
}
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);
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(struct drm_clip_rect), DRM_MEM_BUFS);
+ if (rects != info->rects)
+ drm_free(rects, update.num * sizeof(struct drm_clip_rect),
+ DRM_MEM_BUFS);
return err;
}
/**
* Caller must hold the drawable spinlock!
*/
-struct drm_drawable_info *drm_get_drawable_info(struct drm_device *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))) {
- DRM_DEBUG("No such drawable %d\n", id);
- return NULL;
+struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id)
+{
+ return idr_find(&dev->drw_idr, id);
+}
+EXPORT_SYMBOL(drm_get_drawable_info);
+
+static int drm_drawable_free(int idr, void *p, void *data)
+{
+ struct drm_drawable_info *info = p;
+
+ if (info) {
+ drm_free(info->rects, info->num_rects *
+ sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
+ drm_free(info, sizeof(*info), DRM_MEM_BUFS);
}
- return dev->drw_info[id];
+ return 0;
+}
+
+void drm_drawable_free_all(struct drm_device *dev)
+{
+ idr_for_each(&dev->drw_idr, drm_drawable_free, NULL);
+ idr_remove_all(&dev->drw_idr);
}
-EXPORT_SYMBOL(drm_get_drawable_info);
projects / deliverable / linux.git / commitdiff
