dev/drm2/drm_context.c

46 #include <dev/drm2/drmP.h>
55  * \param dev DRM device.
62 void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
65 	    dev->ctx_bitmap == NULL) {
71 	DRM_LOCK(dev);
72 	clear_bit(ctx_handle, dev->ctx_bitmap);
73 	dev->context_sareas[ctx_handle] = NULL;
74 	DRM_UNLOCK(dev);
80  * \param dev DRM device.
86 static int drm_ctxbitmap_next(struct drm_device * dev)
90 	if (dev->ctx_bitmap == NULL)
93 	DRM_LOCK(dev);
94 	bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP);
96 		DRM_UNLOCK(dev);
100 	set_bit(bit, dev->ctx_bitmap);
102 	if ((bit+1) > dev->max_context) {
106 		ctx_sareas = realloc(dev->context_sareas,
107 		    max_ctx * sizeof(*dev->context_sareas),
110 			clear_bit(bit, dev->ctx_bitmap);
112 			DRM_UNLOCK(dev);
115 		dev->max_context = max_ctx;
116 		dev->context_sareas = ctx_sareas;
117 		dev->context_sareas[bit] = NULL;
119 	DRM_UNLOCK(dev);
126  * \param dev DRM device.
130 int drm_ctxbitmap_init(struct drm_device * dev)
135 	DRM_LOCK(dev);
136 	dev->ctx_bitmap = malloc(PAGE_SIZE, DRM_MEM_CTXBITMAP,
138 	if (dev->ctx_bitmap == NULL) {
139 		DRM_UNLOCK(dev);
142 	dev->context_sareas = NULL;
143 	dev->max_context = -1;
144 	DRM_UNLOCK(dev);
147 		temp = drm_ctxbitmap_next(dev);
157  * \param dev DRM device.
162 void drm_ctxbitmap_cleanup(struct drm_device * dev)
164 	DRM_LOCK(dev);
165 	if (dev->context_sareas != NULL)
166 		free(dev->context_sareas, DRM_MEM_SAREA);
167 	free(dev->ctx_bitmap, DRM_MEM_CTXBITMAP);
168 	DRM_UNLOCK(dev);
189 int drm_getsareactx(struct drm_device *dev, void *data,
195 	DRM_LOCK(dev);
196 	if (dev->max_context < 0 ||
197 	    request->ctx_id >= (unsigned) dev->max_context) {
198 		DRM_UNLOCK(dev);
202 	map = dev->context_sareas[request->ctx_id];
203 	DRM_UNLOCK(dev);
222 int drm_setsareactx(struct drm_device *dev, void *data,
229 	DRM_LOCK(dev);
230 	list_for_each_entry(r_list, &dev->maplist, head) {
233 			if (dev->max_context < 0)
235 			if (request->ctx_id >= (unsigned) dev->max_context)
237 			dev->context_sareas[request->ctx_id] = map;
238 			DRM_UNLOCK(dev);
244 	DRM_UNLOCK(dev);
257  * \param dev DRM device.
264 static int drm_context_switch(struct drm_device * dev, int old, int new)
266 	if (test_and_set_bit(0, &dev->context_flag)) {
273 	if (new == dev->last_context) {
274 		clear_bit(0, &dev->context_flag);
284  * \param dev DRM device.
292 static int drm_context_switch_complete(struct drm_device *dev,
295 	dev->last_context = new;	/* PRE/POST: This is the _only_ writer. */
296 	dev->last_switch = jiffies;
305 	clear_bit(0, &dev->context_flag);
306 	wakeup(&dev->context_wait);
320 int drm_resctx(struct drm_device *dev, void *data,
351 int drm_addctx(struct drm_device *dev, void *data,
357 	ctx->handle = drm_ctxbitmap_next(dev);
360 		ctx->handle = drm_ctxbitmap_next(dev);
379 	DRM_LOCK(dev);
380 	list_add(&ctx_entry->head, &dev->ctxlist);
381 	++dev->ctx_count;
382 	DRM_UNLOCK(dev);
387 int drm_modctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
402 int drm_getctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
423 int drm_switchctx(struct drm_device *dev, void *data,
429 	return drm_context_switch(dev, dev->last_context, ctx->handle);
443 int drm_newctx(struct drm_device *dev, void *data,
449 	drm_context_switch_complete(dev, file_priv, ctx->handle);
465 int drm_rmctx(struct drm_device *dev, void *data,
472 		if (dev->driver->context_dtor)
473 			dev->driver->context_dtor(dev, ctx->handle);
474 		drm_ctxbitmap_free(dev, ctx->handle);
477 	DRM_LOCK(dev);
478 	if (!list_empty(&dev->ctxlist)) {
481 		list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
485 				--dev->ctx_count;
489 	DRM_UNLOCK(dev);