cxl/core/hdm.c

217 static void __cxl_dpa_release(struct cxl_endpoint_decoder *cxled)
219 	struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
220 	struct cxl_port *port = cxled_to_port(cxled);
222 	struct resource *res = cxled->dpa_res;
228 	skip_start = res->start - cxled->skip;
230 	if (cxled->skip)
231 		__release_region(&cxlds->dpa_res, skip_start, cxled->skip);
232 	cxled->skip = 0;
233 	cxled->dpa_res = NULL;
234 	put_device(&cxled->cxld.dev);
238 static void cxl_dpa_release(void *cxled)
241 	__cxl_dpa_release(cxled);
249 static void devm_cxl_dpa_release(struct cxl_endpoint_decoder *cxled)
251 	struct cxl_port *port = cxled_to_port(cxled);
254 	devm_remove_action(&port->dev, cxl_dpa_release, cxled);
255 	__cxl_dpa_release(cxled);
258 static int __cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled,
262 	struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
263 	struct cxl_port *port = cxled_to_port(cxled);
272 			 port->id, cxled->cxld.id);
276 	if (cxled->dpa_res) {
278 			port->id, cxled->cxld.id, cxled->dpa_res);
282 	if (port->hdm_end + 1 != cxled->cxld.id) {
290 			cxled->cxld.id, port->id, port->hdm_end + 1);
296 				       dev_name(&cxled->cxld.dev), 0);
300 				port->id, cxled->cxld.id);
305 			       dev_name(&cxled->cxld.dev), 0);
308 			port->id, cxled->cxld.id);
314 	cxled->dpa_res = res;
315 	cxled->skip = skipped;
318 		cxled->mode = CXL_DECODER_PMEM;
320 		cxled->mode = CXL_DECODER_RAM;
323 			 port->id, cxled->cxld.id, cxled->dpa_res);
324 		cxled->mode = CXL_DECODER_MIXED;
328 	get_device(&cxled->cxld.dev);
332 int devm_cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled,
336 	struct cxl_port *port = cxled_to_port(cxled);
340 	rc = __cxl_dpa_reserve(cxled, base, len, skipped);
346 	return devm_add_action_or_reset(&port->dev, cxl_dpa_release, cxled);
350 resource_size_t cxl_dpa_size(struct cxl_endpoint_decoder *cxled)
355 	if (cxled->dpa_res)
356 		size = resource_size(cxled->dpa_res);
362 resource_size_t cxl_dpa_resource_start(struct cxl_endpoint_decoder *cxled)
367 	if (cxled->dpa_res)
368 		base = cxled->dpa_res->start;
373 int cxl_dpa_free(struct cxl_endpoint_decoder *cxled)
375 	struct cxl_port *port = cxled_to_port(cxled);
376 	struct device *dev = &cxled->cxld.dev;
380 	if (!cxled->dpa_res) {
384 	if (cxled->cxld.region) {
386 			dev_name(&cxled->cxld.region->dev));
390 	if (cxled->cxld.flags & CXL_DECODER_F_ENABLE) {
395 	if (cxled->cxld.id != port->hdm_end) {
401 	devm_cxl_dpa_release(cxled);
408 int cxl_dpa_set_mode(struct cxl_endpoint_decoder *cxled,
411 	struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
413 	struct device *dev = &cxled->cxld.dev;
426 	if (cxled->cxld.flags & CXL_DECODER_F_ENABLE) {
446 	cxled->mode = mode;
454 int cxl_dpa_alloc(struct cxl_endpoint_decoder *cxled, unsigned long long size)
456 	struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
458 	struct cxl_port *port = cxled_to_port(cxled);
460 	struct device *dev = &cxled->cxld.dev;
466 	if (cxled->cxld.region) {
468 			dev_name(&cxled->cxld.region->dev));
473 	if (cxled->cxld.flags & CXL_DECODER_F_ENABLE) {
493 	if (cxled->mode == CXL_DECODER_RAM) {
497 	} else if (cxled->mode == CXL_DECODER_PMEM) {
522 			cxl_decoder_mode_name(cxled->mode), &avail);
527 	rc = __cxl_dpa_reserve(cxled, start, size, skip);
534 	return devm_add_action_or_reset(&port->dev, cxl_dpa_release, cxled);
639 		struct cxl_endpoint_decoder *cxled =
641 		struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
677 		struct cxl_endpoint_decoder *cxled =
682 		writel(upper_32_bits(cxled->skip), sk_hi);
683 		writel(lower_32_bits(cxled->skip), sk_lo);
736 		struct cxl_endpoint_decoder *cxled;
738 		cxled = to_cxl_endpoint_decoder(&cxld->dev);
739 		cxled->state = CXL_DECODER_STATE_MANUAL;
749 	struct cxl_endpoint_decoder *cxled;
756 	cxled = to_cxl_endpoint_decoder(&cxld->dev);
773 	rc = devm_cxl_dpa_reserve(cxled, *dpa_base, len, 0);
781 	cxled->state = CXL_DECODER_STATE_AUTO;
790 	struct cxl_endpoint_decoder *cxled = NULL;
825 		cxled = to_cxl_endpoint_decoder(&cxld->dev);
857 		if (cxled) {
858 			struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
901 	if (!cxled) {
924 	rc = devm_cxl_dpa_reserve(cxled, *dpa_base + skip, dpa_size, skip);
934 	cxled->state = CXL_DECODER_STATE_AUTO;
987 			struct cxl_endpoint_decoder *cxled;
989 			cxled = cxl_endpoint_decoder_alloc(port);
990 			if (IS_ERR(cxled)) {
994 				return PTR_ERR(cxled);
996 			cxld = &cxled->cxld;