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