23  * The Shared Memory Point to Point (SMP2P) protocol facilitates communication
32  * single-writer, SMP2P does not require any remote locking mechanisms.
79  * @smp2p:	reference to the device driver context
92 	struct qcom_smp2p *smp2p;  member
151 static void qcom_smp2p_kick(struct qcom_smp2p *smp2p)  in qcom_smp2p_kick()  argument
156 	if (smp2p->mbox_chan) {  in qcom_smp2p_kick()
157 		mbox_send_message(smp2p->mbox_chan, NULL);  in qcom_smp2p_kick()
158 		mbox_client_txdone(smp2p->mbox_chan, 0);  in qcom_smp2p_kick()
160 		regmap_write(smp2p->ipc_regmap, smp2p->ipc_offset, BIT(smp2p->ipc_bit));  in qcom_smp2p_kick()
167  * @data:	smp2p driver context
176 	struct qcom_smp2p *smp2p = data;  in qcom_smp2p_intr()  local
177 	unsigned smem_id = smp2p->smem_items[SMP2P_INBOUND];  in qcom_smp2p_intr()
178 	unsigned pid = smp2p->remote_pid;  in qcom_smp2p_intr()
186 	in = smp2p->in;  in qcom_smp2p_intr()
192 			dev_err(smp2p->dev,  in qcom_smp2p_intr()
193 				"Unable to acquire remote smp2p item\n");  in qcom_smp2p_intr()
197 		smp2p->in = in;  in qcom_smp2p_intr()
201 	for (i = smp2p->valid_entries; i < in->valid_entries; i++) {  in qcom_smp2p_intr()
202 		list_for_each_entry(entry, &smp2p->inbound, node) {  in qcom_smp2p_intr()
210 	smp2p->valid_entries = i;  in qcom_smp2p_intr()
213 	list_for_each_entry(entry, &smp2p->inbound, node) {  in qcom_smp2p_intr()
280 	.name           = "smp2p",
305 static int qcom_smp2p_inbound_entry(struct qcom_smp2p *smp2p,  in qcom_smp2p_inbound_entry()  argument
311 		dev_err(smp2p->dev, "failed to add irq_domain\n");  in qcom_smp2p_inbound_entry()
332 		qcom_smp2p_kick(entry->smp2p);  in smp2p_update_bits()
341 static int qcom_smp2p_outbound_entry(struct qcom_smp2p *smp2p,  in qcom_smp2p_outbound_entry()  argument
345 	struct smp2p_smem_item *out = smp2p->out;  in qcom_smp2p_outbound_entry()
359 		dev_err(smp2p->dev, "failed to register qcom_smem_state\n");  in qcom_smp2p_outbound_entry()
366 static int qcom_smp2p_alloc_outbound_item(struct qcom_smp2p *smp2p)  in qcom_smp2p_alloc_outbound_item()  argument
369 	unsigned smem_id = smp2p->smem_items[SMP2P_OUTBOUND];  in qcom_smp2p_alloc_outbound_item()
370 	unsigned pid = smp2p->remote_pid;  in qcom_smp2p_alloc_outbound_item()
376 			dev_err(smp2p->dev,  in qcom_smp2p_alloc_outbound_item()
377 				"unable to allocate local smp2p item\n");  in qcom_smp2p_alloc_outbound_item()
383 		dev_err(smp2p->dev, "Unable to acquire local smp2p item\n");  in qcom_smp2p_alloc_outbound_item()
389 	out->local_pid = smp2p->local_pid;  in qcom_smp2p_alloc_outbound_item()
390 	out->remote_pid = smp2p->remote_pid;  in qcom_smp2p_alloc_outbound_item()
401 	qcom_smp2p_kick(smp2p);  in qcom_smp2p_alloc_outbound_item()
403 	smp2p->out = out;  in qcom_smp2p_alloc_outbound_item()
408 static int smp2p_parse_ipc(struct qcom_smp2p *smp2p)  in smp2p_parse_ipc()  argument
411 	struct device *dev = smp2p->dev;  in smp2p_parse_ipc()
421 	smp2p->ipc_regmap = syscon_node_to_regmap(syscon);  in smp2p_parse_ipc()
422 	if (IS_ERR(smp2p->ipc_regmap))  in smp2p_parse_ipc()
423 		return PTR_ERR(smp2p->ipc_regmap);  in smp2p_parse_ipc()
426 	ret = of_property_read_u32_index(dev->of_node, key, 1, &smp2p->ipc_offset);  in smp2p_parse_ipc()
432 	ret = of_property_read_u32_index(dev->of_node, key, 2, &smp2p->ipc_bit);  in smp2p_parse_ipc()
445 	struct qcom_smp2p *smp2p;  in qcom_smp2p_probe()  local
450 	smp2p = devm_kzalloc(&pdev->dev, sizeof(*smp2p), GFP_KERNEL);  in qcom_smp2p_probe()
451 	if (!smp2p)  in qcom_smp2p_probe()
454 	smp2p->dev = &pdev->dev;  in qcom_smp2p_probe()
455 	INIT_LIST_HEAD(&smp2p->inbound);  in qcom_smp2p_probe()
456 	INIT_LIST_HEAD(&smp2p->outbound);  in qcom_smp2p_probe()
458 	platform_set_drvdata(pdev, smp2p);  in qcom_smp2p_probe()
462 					 smp2p->smem_items, 2);  in qcom_smp2p_probe()
467 	ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->local_pid);  in qcom_smp2p_probe()
472 	ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->remote_pid);  in qcom_smp2p_probe()
480 	smp2p->mbox_client.dev = &pdev->dev;  in qcom_smp2p_probe()
481 	smp2p->mbox_client.knows_txdone = true;  in qcom_smp2p_probe()
482 	smp2p->mbox_chan = mbox_request_channel(&smp2p->mbox_client, 0);  in qcom_smp2p_probe()
483 	if (IS_ERR(smp2p->mbox_chan)) {  in qcom_smp2p_probe()
484 		if (PTR_ERR(smp2p->mbox_chan) != -ENODEV)  in qcom_smp2p_probe()
485 			return PTR_ERR(smp2p->mbox_chan);  in qcom_smp2p_probe()
487 		smp2p->mbox_chan = NULL;  in qcom_smp2p_probe()
489 		ret = smp2p_parse_ipc(smp2p);  in qcom_smp2p_probe()
494 	ret = qcom_smp2p_alloc_outbound_item(smp2p);  in qcom_smp2p_probe()
505 		entry->smp2p = smp2p;  in qcom_smp2p_probe()
513 			ret = qcom_smp2p_inbound_entry(smp2p, entry, node);  in qcom_smp2p_probe()
517 			list_add(&entry->node, &smp2p->inbound);  in qcom_smp2p_probe()
519 			ret = qcom_smp2p_outbound_entry(smp2p, entry, node);  in qcom_smp2p_probe()
523 			list_add(&entry->node, &smp2p->outbound);  in qcom_smp2p_probe()
528 	qcom_smp2p_kick(smp2p);  in qcom_smp2p_probe()
533 					"smp2p", (void *)smp2p);  in qcom_smp2p_probe()
543 	list_for_each_entry(entry, &smp2p->inbound, node)  in qcom_smp2p_probe()
546 	list_for_each_entry(entry, &smp2p->outbound, node)  in qcom_smp2p_probe()
549 	smp2p->out->valid_entries = 0;  in qcom_smp2p_probe()
552 	mbox_free_channel(smp2p->mbox_chan);  in qcom_smp2p_probe()
563 	struct qcom_smp2p *smp2p = platform_get_drvdata(pdev);  in qcom_smp2p_remove()  local
566 	list_for_each_entry(entry, &smp2p->inbound, node)  in qcom_smp2p_remove()
569 	list_for_each_entry(entry, &smp2p->outbound, node)  in qcom_smp2p_remove()
572 	mbox_free_channel(smp2p->mbox_chan);  in qcom_smp2p_remove()
574 	smp2p->out->valid_entries = 0;  in qcom_smp2p_remove()
580 	{ .compatible = "qcom,smp2p" },