io/drm/drm_context.c

67 drm_ctxbitmap_free(drm_device_t *dev, int ctx_handle)
70 	    dev->ctx_bitmap == NULL) {
78 	clear_bit(ctx_handle, dev->ctx_bitmap);
79 	dev->context_sareas[ctx_handle] = NULL;
85 drm_ctxbitmap_next(drm_device_t *dev)
89 	if (dev->ctx_bitmap == NULL)
93 	bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP);
99 	set_bit(bit, dev->ctx_bitmap);
101 	if ((bit+1) > dev->max_context) {
102 		dev->max_context = (bit+1);
103 		if (dev->context_sareas != NULL) {
105 			ctx_sareas = drm_realloc(dev->context_sareas,
106 			    (dev->max_context - 1) *
107 			    sizeof (*dev->context_sareas),
108 			    dev->max_context *
109 			    sizeof (*dev->context_sareas),
112 				clear_bit(bit, dev->ctx_bitmap);
116 			dev->context_sareas = ctx_sareas;
117 			dev->context_sareas[bit] = NULL;
120 			dev->context_sareas = drm_alloc(dev->max_context *
121 			    sizeof (*dev->context_sareas), KM_NOSLEEP);
122 			if (dev->context_sareas == NULL) {
123 				clear_bit(bit, dev->ctx_bitmap);
127 			dev->context_sareas[bit] = NULL;
136 drm_ctxbitmap_init(drm_device_t *dev)
142 	dev->ctx_bitmap = drm_calloc(1, DRM_PAGE_SIZE, DRM_MEM_CTXBITMAP);
143 	if (dev->ctx_bitmap == NULL) {
147 	dev->context_sareas = NULL;
148 	dev->max_context = -1;
152 		temp = drm_ctxbitmap_next(dev);
159 drm_ctxbitmap_cleanup(drm_device_t *dev)
162 	if (dev->context_sareas != NULL)
163 		drm_free(dev->context_sareas,
164 		    sizeof (*dev->context_sareas) *
165 		    dev->max_context,
167 	drm_free(dev->ctx_bitmap, DRM_PAGE_SIZE, DRM_MEM_CTXBITMAP);
195 	if (dev->max_context < 0 || request.ctx_id >= (unsigned)
196 	    dev->max_context) {
201 	map = dev->context_sareas[request.ctx_id];
246 	TAILQ_FOREACH(map, &dev->maplist, link) {
248 			if (dev->max_context < 0)
250 			if (request.ctx_id >= (unsigned)dev->max_context)
252 			dev->context_sareas[request.ctx_id] = map;
267 drm_context_switch(drm_device_t *dev, int old, int new)
269 	if (test_and_set_bit(0, &dev->context_flag)) {
277 	if (new == dev->last_context) {
278 		clear_bit(0, &dev->context_flag);
286 drm_context_switch_complete(drm_device_t *dev, int new)
288 	dev->last_context = new;  /* PRE/POST: This is the _only_ writer. */
290 	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
299 	clear_bit(0, &dev->context_flag);
356 	ctx.handle = drm_ctxbitmap_next(dev);
359 		ctx.handle = drm_ctxbitmap_next(dev);
365 	if (dev->driver->context_ctor && ctx.handle != DRM_KERNEL_CONTEXT) {
366 		dev->driver->context_ctor(dev, ctx.handle);
408 	return (drm_context_switch(dev, dev->last_context, ctx.handle));
421 	(void) drm_context_switch_complete(dev, ctx.handle);
437 		if (dev->driver->context_dtor) {
439 			dev->driver->context_dtor(dev, ctx.handle);
443 		drm_ctxbitmap_free(dev, ctx.handle);