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
152 static void qcom_smp2p_kick(struct qcom_smp2p *smp2p)  in qcom_smp2p_kick()  argument
157 	if (smp2p->mbox_chan) {  in qcom_smp2p_kick()
158 		mbox_send_message(smp2p->mbox_chan, NULL);  in qcom_smp2p_kick()
159 		mbox_client_txdone(smp2p->mbox_chan, 0);  in qcom_smp2p_kick()
161 		regmap_write(smp2p->ipc_regmap, smp2p->ipc_offset, BIT(smp2p->ipc_bit));  in qcom_smp2p_kick()
168  * @data:	smp2p driver context
177 	struct qcom_smp2p *smp2p = data;  in qcom_smp2p_intr()  local
178 	unsigned smem_id = smp2p->smem_items[SMP2P_INBOUND];  in qcom_smp2p_intr()
179 	unsigned pid = smp2p->remote_pid;  in qcom_smp2p_intr()
187 	in = smp2p->in;  in qcom_smp2p_intr()
193 			dev_err(smp2p->dev,  in qcom_smp2p_intr()
194 				"Unable to acquire remote smp2p item\n");  in qcom_smp2p_intr()
198 		smp2p->in = in;  in qcom_smp2p_intr()
202 	for (i = smp2p->valid_entries; i < in->valid_entries; i++) {  in qcom_smp2p_intr()
203 		list_for_each_entry(entry, &smp2p->inbound, node) {  in qcom_smp2p_intr()
211 	smp2p->valid_entries = i;  in qcom_smp2p_intr()
214 	list_for_each_entry(entry, &smp2p->inbound, node) {  in qcom_smp2p_intr()
281 	.name           = "smp2p",
306 static int qcom_smp2p_inbound_entry(struct qcom_smp2p *smp2p,  in qcom_smp2p_inbound_entry()  argument
312 		dev_err(smp2p->dev, "failed to add irq_domain\n");  in qcom_smp2p_inbound_entry()
334 		qcom_smp2p_kick(entry->smp2p);  in smp2p_update_bits()
343 static int qcom_smp2p_outbound_entry(struct qcom_smp2p *smp2p,  in qcom_smp2p_outbound_entry()  argument
347 	struct smp2p_smem_item *out = smp2p->out;  in qcom_smp2p_outbound_entry()
361 		dev_err(smp2p->dev, "failed to register qcom_smem_state\n");  in qcom_smp2p_outbound_entry()
368 static int qcom_smp2p_alloc_outbound_item(struct qcom_smp2p *smp2p)  in qcom_smp2p_alloc_outbound_item()  argument
371 	unsigned smem_id = smp2p->smem_items[SMP2P_OUTBOUND];  in qcom_smp2p_alloc_outbound_item()
372 	unsigned pid = smp2p->remote_pid;  in qcom_smp2p_alloc_outbound_item()
378 			dev_err(smp2p->dev,  in qcom_smp2p_alloc_outbound_item()
379 				"unable to allocate local smp2p item\n");  in qcom_smp2p_alloc_outbound_item()
385 		dev_err(smp2p->dev, "Unable to acquire local smp2p item\n");  in qcom_smp2p_alloc_outbound_item()
391 	out->local_pid = smp2p->local_pid;  in qcom_smp2p_alloc_outbound_item()
392 	out->remote_pid = smp2p->remote_pid;  in qcom_smp2p_alloc_outbound_item()
403 	qcom_smp2p_kick(smp2p);  in qcom_smp2p_alloc_outbound_item()
405 	smp2p->out = out;  in qcom_smp2p_alloc_outbound_item()
410 static int smp2p_parse_ipc(struct qcom_smp2p *smp2p)  in smp2p_parse_ipc()  argument
413 	struct device *dev = smp2p->dev;  in smp2p_parse_ipc()
423 	smp2p->ipc_regmap = syscon_node_to_regmap(syscon);  in smp2p_parse_ipc()
424 	if (IS_ERR(smp2p->ipc_regmap))  in smp2p_parse_ipc()
425 		return PTR_ERR(smp2p->ipc_regmap);  in smp2p_parse_ipc()
428 	ret = of_property_read_u32_index(dev->of_node, key, 1, &smp2p->ipc_offset);  in smp2p_parse_ipc()
434 	ret = of_property_read_u32_index(dev->of_node, key, 2, &smp2p->ipc_bit);  in smp2p_parse_ipc()
447 	struct qcom_smp2p *smp2p;  in qcom_smp2p_probe()  local
452 	smp2p = devm_kzalloc(&pdev->dev, sizeof(*smp2p), GFP_KERNEL);  in qcom_smp2p_probe()
453 	if (!smp2p)  in qcom_smp2p_probe()
456 	smp2p->dev = &pdev->dev;  in qcom_smp2p_probe()
457 	INIT_LIST_HEAD(&smp2p->inbound);  in qcom_smp2p_probe()
458 	INIT_LIST_HEAD(&smp2p->outbound);  in qcom_smp2p_probe()
460 	platform_set_drvdata(pdev, smp2p);  in qcom_smp2p_probe()
464 					 smp2p->smem_items, 2);  in qcom_smp2p_probe()
469 	ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->local_pid);  in qcom_smp2p_probe()
474 	ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->remote_pid);  in qcom_smp2p_probe()
482 	smp2p->mbox_client.dev = &pdev->dev;  in qcom_smp2p_probe()
483 	smp2p->mbox_client.knows_txdone = true;  in qcom_smp2p_probe()
484 	smp2p->mbox_chan = mbox_request_channel(&smp2p->mbox_client, 0);  in qcom_smp2p_probe()
485 	if (IS_ERR(smp2p->mbox_chan)) {  in qcom_smp2p_probe()
486 		if (PTR_ERR(smp2p->mbox_chan) != -ENODEV)  in qcom_smp2p_probe()
487 			return PTR_ERR(smp2p->mbox_chan);  in qcom_smp2p_probe()
489 		smp2p->mbox_chan = NULL;  in qcom_smp2p_probe()
491 		ret = smp2p_parse_ipc(smp2p);  in qcom_smp2p_probe()
496 	ret = qcom_smp2p_alloc_outbound_item(smp2p);  in qcom_smp2p_probe()
507 		entry->smp2p = smp2p;  in qcom_smp2p_probe()
515 			ret = qcom_smp2p_inbound_entry(smp2p, entry, node);  in qcom_smp2p_probe()
519 			list_add(&entry->node, &smp2p->inbound);  in qcom_smp2p_probe()
521 			ret = qcom_smp2p_outbound_entry(smp2p, entry, node);  in qcom_smp2p_probe()
525 			list_add(&entry->node, &smp2p->outbound);  in qcom_smp2p_probe()
530 	qcom_smp2p_kick(smp2p);  in qcom_smp2p_probe()
535 					"smp2p", (void *)smp2p);  in qcom_smp2p_probe()
545 	list_for_each_entry(entry, &smp2p->inbound, node)  in qcom_smp2p_probe()
548 	list_for_each_entry(entry, &smp2p->outbound, node)  in qcom_smp2p_probe()
551 	smp2p->out->valid_entries = 0;  in qcom_smp2p_probe()
554 	mbox_free_channel(smp2p->mbox_chan);  in qcom_smp2p_probe()
565 	struct qcom_smp2p *smp2p = platform_get_drvdata(pdev);  in qcom_smp2p_remove()  local
568 	list_for_each_entry(entry, &smp2p->inbound, node)  in qcom_smp2p_remove()
571 	list_for_each_entry(entry, &smp2p->outbound, node)  in qcom_smp2p_remove()
574 	mbox_free_channel(smp2p->mbox_chan);  in qcom_smp2p_remove()
576 	smp2p->out->valid_entries = 0;  in qcom_smp2p_remove()
582 	{ .compatible = "qcom,smp2p" },