dev/drm/drm_context.c

38 #include "dev/drm/drmP.h"
44 void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle)
47 	    dev->ctx_bitmap == NULL) {
54 	clear_bit(ctx_handle, dev->ctx_bitmap);
55 	dev->context_sareas[ctx_handle] = NULL;
60 int drm_ctxbitmap_next(struct drm_device *dev)
64 	if (dev->ctx_bitmap == NULL)
68 	bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP);
74 	set_bit(bit, dev->ctx_bitmap);
76 	if ((bit+1) > dev->max_context) {
80 		ctx_sareas = realloc(dev->context_sareas,
81 		    max_ctx * sizeof(*dev->context_sareas),
84 			clear_bit(bit, dev->ctx_bitmap);
89 		dev->max_context = max_ctx;
90 		dev->context_sareas = ctx_sareas;
91 		dev->context_sareas[bit] = NULL;
97 int drm_ctxbitmap_init(struct drm_device *dev)
103 	dev->ctx_bitmap = malloc(PAGE_SIZE, DRM_MEM_CTXBITMAP,
105 	if (dev->ctx_bitmap == NULL) {
109 	dev->context_sareas = NULL;
110 	dev->max_context = -1;
114 		temp = drm_ctxbitmap_next(dev);
121 void drm_ctxbitmap_cleanup(struct drm_device *dev)
124 	if (dev->context_sareas != NULL)
125 		free(dev->context_sareas, DRM_MEM_SAREA);
126 	free(dev->ctx_bitmap, DRM_MEM_CTXBITMAP);
134 int drm_getsareactx(struct drm_device *dev, void *data,
141 	if (dev->max_context < 0 ||
142 	    request->ctx_id >= (unsigned) dev->max_context) {
147 	map = dev->context_sareas[request->ctx_id];
155 int drm_setsareactx(struct drm_device *dev, void *data,
162 	TAILQ_FOREACH(map, &dev->maplist, link) {
164 			if (dev->max_context < 0)
166 			if (request->ctx_id >= (unsigned) dev->max_context)
168 			dev->context_sareas[request->ctx_id] = map;
183 int drm_context_switch(struct drm_device *dev, int old, int new)
185 	if (test_and_set_bit(0, &dev->context_flag)) {
192 	if (new == dev->last_context) {
193 		clear_bit(0, &dev->context_flag);
200 int drm_context_switch_complete(struct drm_device *dev, int new)
202 	dev->last_context = new;  /* PRE/POST: This is the _only_ writer. */
204 	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
211 	clear_bit(0, &dev->context_flag);
216 int drm_resctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
236 int drm_addctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
240 	ctx->handle = drm_ctxbitmap_next(dev);
243 		ctx->handle = drm_ctxbitmap_next(dev);
252 	if (dev->driver->context_ctor && ctx->handle != DRM_KERNEL_CONTEXT) {
254 		dev->driver->context_ctor(dev, ctx->handle);
261 int drm_modctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
267 int drm_getctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
277 int drm_switchctx(struct drm_device *dev, void *data,
283 	return drm_context_switch(dev, dev->last_context, ctx->handle);
286 int drm_newctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
291 	drm_context_switch_complete(dev, ctx->handle);
296 int drm_rmctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
302 		if (dev->driver->context_dtor) {
304 			dev->driver->context_dtor(dev, ctx->handle);
308 		drm_ctxbitmap_free(dev, ctx->handle);