3  * Microchip Inter-Processor communication (IPC) driver
21 #include <linux/mailbox/mchp-ipc.h>
44  * struct mchp_ipc_mbox_info - IPC probe message format
46  * @hw_type:		IPC implementation available in the hardware
47  * @num_channels:	number of IPC channels available in the hardware
49  * Used to retrieve information on the IPC implementation
58  * struct mchp_ipc_init - IPC channel init message format
70  * struct mchp_ipc_status - IPC status message format
85  * struct mchp_ipc_sbi_msg - IPC SBI payload message
93  * the IPC.
173 	struct mchp_ipc_sbi_mbox *ipc = (struct mchp_ipc_sbi_mbox *)data;  in mchp_ipc_cluster_aggr_isr()  local
183 		if (irq == ipc->cluster_cfg[hartid].irq)  in mchp_ipc_cluster_aggr_isr()
188 	memcpy(ipc->cluster_cfg[hartid].buf_base, &status_msg, sizeof(struct mchp_ipc_status));  in mchp_ipc_cluster_aggr_isr()
190 	ret = mchp_ipc_sbi_send(SBI_EXT_IPC_STATUS, ipc->cluster_cfg[hartid].buf_base_addr);  in mchp_ipc_cluster_aggr_isr()
192 		dev_err_ratelimited(ipc->dev, "could not get IHC irq status ret=%d\n", ret);  in mchp_ipc_cluster_aggr_isr()
196 	memcpy(&status_msg, ipc->cluster_cfg[hartid].buf_base, sizeof(struct mchp_ipc_status));  in mchp_ipc_cluster_aggr_isr()
219 		 * are unique across all clusters of an IPC, and iterate contiguously  in mchp_ipc_cluster_aggr_isr()
224 		chan = &ipc->chans[chan_id];  in mchp_ipc_cluster_aggr_isr()
235 			mbox_chan_received_data(&ipc->chans[chan_id], (void *)&ipc_msg);  in mchp_ipc_cluster_aggr_isr()
240 			mbox_chan_txdone(&ipc->chans[chan_id], ret);  in mchp_ipc_cluster_aggr_isr()
263 	struct mchp_ipc_sbi_mbox *ipc = to_mchp_ipc_mbox(chan->mbox);  in mchp_ipc_startup()  local
294 		dev_err(ipc->dev, "channel %u init failed\n", chan_info->id);  in mchp_ipc_startup()
317 	switch (ipc->hw_type) {  in mchp_ipc_startup()
325 		dev_err(ipc->dev, "failed to register interrupt(s)\n");  in mchp_ipc_startup()
362 	struct mchp_ipc_sbi_mbox *ipc = to_mchp_ipc_mbox(controller);  in mchp_ipc_mbox_xlate()  local
365 	if (chan_id >= ipc->controller.num_chans) {  in mchp_ipc_mbox_xlate()
366 		dev_err(ipc->dev, "invalid channel id %d\n", chan_id);  in mchp_ipc_mbox_xlate()
370 	return &ipc->chans[chan_id];  in mchp_ipc_mbox_xlate()
373 static int mchp_ipc_get_cluster_aggr_irq(struct mchp_ipc_sbi_mbox *ipc)  in mchp_ipc_get_cluster_aggr_irq()  argument
375 	struct platform_device *pdev = to_platform_device(ipc->dev);  in mchp_ipc_get_cluster_aggr_irq()
383 		irq_name = devm_kasprintf(ipc->dev, GFP_KERNEL, "hart-%lu", hartid);  in mchp_ipc_get_cluster_aggr_irq()
388 		ipc->cluster_cfg[hartid].irq = ret;  in mchp_ipc_get_cluster_aggr_irq()
389 		ret = devm_request_irq(ipc->dev, ipc->cluster_cfg[hartid].irq,  in mchp_ipc_get_cluster_aggr_irq()
391 				       "miv-ihc-irq", ipc);  in mchp_ipc_get_cluster_aggr_irq()
395 		ipc->cluster_cfg[hartid].buf_base = devm_kmalloc(ipc->dev,  in mchp_ipc_get_cluster_aggr_irq()
399 		if (!ipc->cluster_cfg[hartid].buf_base)  in mchp_ipc_get_cluster_aggr_irq()
402 		ipc->cluster_cfg[hartid].buf_base_addr = __pa(ipc->cluster_cfg[hartid].buf_base);  in mchp_ipc_get_cluster_aggr_irq()
414 	struct mchp_ipc_sbi_mbox *ipc;  in mchp_ipc_probe()  local
424 	ipc = devm_kzalloc(dev, sizeof(*ipc), GFP_KERNEL);  in mchp_ipc_probe()
425 	if (!ipc)  in mchp_ipc_probe()
428 	platform_set_drvdata(pdev, ipc);  in mchp_ipc_probe()
430 	ipc->buf_base = devm_kmalloc(dev, sizeof(struct mchp_ipc_mbox_info), GFP_KERNEL);  in mchp_ipc_probe()
431 	if (!ipc->buf_base)  in mchp_ipc_probe()
434 	ipc->buf_base_addr = __pa(ipc->buf_base);  in mchp_ipc_probe()
436 	ret = mchp_ipc_sbi_send(SBI_EXT_IPC_PROBE, ipc->buf_base_addr);  in mchp_ipc_probe()
438 		return dev_err_probe(dev, ret, "could not probe IPC SBI service\n");  in mchp_ipc_probe()
440 	memcpy(&ipc_info, ipc->buf_base, sizeof(struct mchp_ipc_mbox_info));  in mchp_ipc_probe()
441 	ipc->controller.num_chans = ipc_info.num_channels;  in mchp_ipc_probe()
442 	ipc->hw_type = ipc_info.hw_type;  in mchp_ipc_probe()
444 	ipc->chans = devm_kcalloc(dev, ipc->controller.num_chans, sizeof(*ipc->chans), GFP_KERNEL);  in mchp_ipc_probe()
445 	if (!ipc->chans)  in mchp_ipc_probe()
448 	ipc->dev = dev;  in mchp_ipc_probe()
449 	ipc->controller.txdone_irq = true;  in mchp_ipc_probe()
450 	ipc->controller.dev = ipc->dev;  in mchp_ipc_probe()
451 	ipc->controller.ops = &mchp_ipc_ops;  in mchp_ipc_probe()
452 	ipc->controller.chans = ipc->chans;  in mchp_ipc_probe()
453 	ipc->controller.of_xlate = mchp_ipc_mbox_xlate;  in mchp_ipc_probe()
455 	for (chan_id = 0; chan_id < ipc->controller.num_chans; chan_id++) {  in mchp_ipc_probe()
460 		ipc->chans[chan_id].con_priv = priv;  in mchp_ipc_probe()
464 	if (ipc->hw_type == MIV_IHC) {  in mchp_ipc_probe()
465 		ipc->cluster_cfg = devm_kcalloc(dev, num_online_cpus(),  in mchp_ipc_probe()
468 		if (!ipc->cluster_cfg)  in mchp_ipc_probe()
471 		if (mchp_ipc_get_cluster_aggr_irq(ipc))  in mchp_ipc_probe()
478 	ret = devm_mbox_controller_register(dev, &ipc->controller);  in mchp_ipc_probe()
481 				    "Inter-Processor communication (IPC) registration failed\n");  in mchp_ipc_probe()
487 	{.compatible = "microchip,sbi-ipc", },
504 MODULE_DESCRIPTION("Microchip Inter-Processor Communication (IPC) driver");