sun4v/io/mdesc.c

184 	struct mdesc_state *mdsp;
191 		mdsp = ddi_get_soft_state(mdesc_state_head,
193 		if (mdsp != NULL) {
261 mdesc_destroy_state(mdesc_state_t *mdsp)
263 	minor_t minor = getminor(mdsp->dev);
265 	if (mdsp->flags & MDESC_GOT_HANDLE)
266 		(void) md_fini_handle(mdsp->mdesc);
268 	cv_destroy(&mdsp->cv);
269 	mutex_destroy(&mdsp->lock);
279 	mdesc_state_t *mdsp;
292 	mdsp = ddi_get_soft_state(mdesc_state_head, minor);
300 	mdsp->dev = makedevice(major, minor);
303 		*devp = mdsp->dev;
305 	mdsp->instance = minor;
307 	mutex_init(&mdsp->lock, NULL, MUTEX_DRIVER, NULL);
309 	cv_init(&mdsp->cv, NULL, CV_DRIVER, NULL);
311 	mdsp->mdesc = md_get_handle();
313 	if (mdsp->mdesc == NULL) {
314 		mdesc_destroy_state(mdsp);
317 	mdsp->flags |= MDESC_GOT_HANDLE;
319 	mdsp->mdesc_len = md_get_bin_size(mdsp->mdesc);
321 	if (mdsp->mdesc_len == 0) {
322 		mdesc_destroy_state(mdsp);
323 		mdsp = NULL;
326 	return (mdsp);
334 	struct mdesc_state *mdsp;
348 	mdsp = mdesc_create_state(devp);
350 	if (mdsp == NULL) {
366 	struct mdesc_state *mdsp;
379 	if ((mdsp = ddi_get_soft_state(mdesc_state_head, instance)) == NULL)
382 	ASSERT(mdsp->instance == instance);
384 	mdesc_destroy_state(mdsp);
418 	struct mdesc_state *mdsp;
426 	if ((mdsp = ddi_get_soft_state(mdesc_state_head, instance)) == NULL)
429 	ASSERT(mdsp->instance == instance);
434 	mutex_enter(&mdsp->lock);
436 	while (mdsp->flags & MDESC_BUSY) {
437 		if (cv_wait_sig(&mdsp->cv, &mdsp->lock) == 0) {
438 			mutex_exit(&mdsp->lock);
443 	if (uiop->uio_offset < 0 || uiop->uio_offset > mdsp->mdesc_len) {
444 		mutex_exit(&mdsp->lock);
448 	if (len > (mdsp->mdesc_len - uiop->uio_offset))
449 		len = mdsp->mdesc_len - uiop->uio_offset;
453 		mutex_exit(&mdsp->lock);
457 	mdsp->flags |= MDESC_BUSY;
458 	mutex_exit(&mdsp->lock);
460 	buf = md_get_md_raw(mdsp->mdesc);
467 	mutex_enter(&mdsp->lock);
468 	mdsp->flags &= ~MDESC_BUSY;
469 	cv_broadcast(&mdsp->cv);
470 	mutex_exit(&mdsp->lock);
483 	struct mdesc_state *mdsp;
486 	if ((mdsp = ddi_get_soft_state(mdesc_state_head, instance)) == NULL)
489 	ASSERT(mdsp->instance == instance);
498 		size_t sz = mdsp->mdesc_len;