233 static bool pcc_chan_plat_irq_can_be_shared(struct pcc_chan_info *pchan)  in pcc_chan_plat_irq_can_be_shared()  argument
235 	return (pchan->plat_irq_flags & ACPI_PCCT_INTERRUPT_MODE) ==  in pcc_chan_plat_irq_can_be_shared()
239 static bool pcc_mbox_cmd_complete_check(struct pcc_chan_info *pchan)  in pcc_mbox_cmd_complete_check()  argument
244 	if (!pchan->cmd_complete.gas)  in pcc_mbox_cmd_complete_check()
247 	ret = pcc_chan_reg_read(&pchan->cmd_complete, &val);  in pcc_mbox_cmd_complete_check()
255 	val &= pchan->cmd_complete.status_mask;  in pcc_mbox_cmd_complete_check()
262 	if (pchan->type == ACPI_PCCT_TYPE_EXT_PCC_SLAVE_SUBSPACE)  in pcc_mbox_cmd_complete_check()
268 static int pcc_mbox_error_check_and_clear(struct pcc_chan_info *pchan)  in pcc_mbox_error_check_and_clear()  argument
273 	ret = pcc_chan_reg_read(&pchan->error, &val);  in pcc_mbox_error_check_and_clear()
277 	if (val & pchan->error.status_mask) {  in pcc_mbox_error_check_and_clear()
278 		val &= pchan->error.preserve_mask;  in pcc_mbox_error_check_and_clear()
279 		pcc_chan_reg_write(&pchan->error, val);  in pcc_mbox_error_check_and_clear()
286 static void pcc_chan_acknowledge(struct pcc_chan_info *pchan)  in pcc_chan_acknowledge()  argument
290 	if (pchan->type != ACPI_PCCT_TYPE_EXT_PCC_SLAVE_SUBSPACE)  in pcc_chan_acknowledge()
293 	pcc_chan_reg_read_modify_write(&pchan->cmd_update);  in pcc_chan_acknowledge()
295 	pcc_hdr = pchan->chan.shmem;  in pcc_chan_acknowledge()
303 		pcc_chan_reg_read_modify_write(&pchan->db);  in pcc_chan_acknowledge()
315 	struct pcc_chan_info *pchan;  in pcc_mbox_irq()  local
318 	pchan = chan->con_priv;  in pcc_mbox_irq()
320 	if (pcc_chan_reg_read_modify_write(&pchan->plat_irq_ack))  in pcc_mbox_irq()
323 	if (pchan->type == ACPI_PCCT_TYPE_EXT_PCC_MASTER_SUBSPACE &&  in pcc_mbox_irq()
324 	    !pchan->chan_in_use)  in pcc_mbox_irq()
327 	if (!pcc_mbox_cmd_complete_check(pchan))  in pcc_mbox_irq()
330 	if (pcc_mbox_error_check_and_clear(pchan))  in pcc_mbox_irq()
339 	pchan->chan_in_use = false;  in pcc_mbox_irq()
343 	pcc_chan_acknowledge(pchan);  in pcc_mbox_irq()
364 	struct pcc_chan_info *pchan;  in pcc_mbox_request_channel()  local
371 	pchan = chan_info + subspace_id;  in pcc_mbox_request_channel()
372 	chan = pchan->chan.mchan;  in pcc_mbox_request_channel()
378 	pcc_mchan = &pchan->chan;  in pcc_mbox_request_channel()
398  * @pchan: Pointer to the PCC mailbox channel as returned by
401 void pcc_mbox_free_channel(struct pcc_mbox_chan *pchan)  in pcc_mbox_free_channel()  argument
403 	struct mbox_chan *chan = pchan->mchan;  in pcc_mbox_free_channel()
435 	struct pcc_chan_info *pchan = chan->con_priv;  in pcc_send_data()  local
437 	ret = pcc_chan_reg_read_modify_write(&pchan->cmd_update);  in pcc_send_data()
441 	ret = pcc_chan_reg_read_modify_write(&pchan->db);  in pcc_send_data()
442 	if (!ret && pchan->plat_irq > 0)  in pcc_send_data()
443 		pchan->chan_in_use = true;  in pcc_send_data()
450 	struct pcc_chan_info *pchan = chan->con_priv;  in pcc_last_tx_done()  local
452 	return pcc_mbox_cmd_complete_check(pchan);  in pcc_last_tx_done()
464 	struct pcc_chan_info *pchan = chan->con_priv;  in pcc_startup()  local
472 	pcc_chan_acknowledge(pchan);  in pcc_startup()
474 	if (pchan->plat_irq > 0) {  in pcc_startup()
475 		irqflags = pcc_chan_plat_irq_can_be_shared(pchan) ?  in pcc_startup()
477 		rc = devm_request_irq(chan->mbox->dev, pchan->plat_irq, pcc_mbox_irq,  in pcc_startup()
481 				pchan->plat_irq);  in pcc_startup()
496 	struct pcc_chan_info *pchan = chan->con_priv;  in pcc_shutdown()  local
498 	if (pchan->plat_irq > 0)  in pcc_shutdown()
499 		devm_free_irq(chan->mbox->dev, pchan->plat_irq, chan);  in pcc_shutdown()
558  * @pchan: Pointer to the PCC channel info structure.
567 static int pcc_parse_subspace_irq(struct pcc_chan_info *pchan,  in pcc_parse_subspace_irq()  argument
578 	pchan->plat_irq = pcc_map_interrupt(pcct_ss->platform_interrupt,  in pcc_parse_subspace_irq()
580 	if (pchan->plat_irq <= 0) {  in pcc_parse_subspace_irq()
585 	pchan->plat_irq_flags = pcct_ss->flags;  in pcc_parse_subspace_irq()
590 		ret = pcc_chan_reg_init(&pchan->plat_irq_ack,  in pcc_parse_subspace_irq()
600 		ret = pcc_chan_reg_init(&pchan->plat_irq_ack,  in pcc_parse_subspace_irq()
607 	if (pcc_chan_plat_irq_can_be_shared(pchan) &&  in pcc_parse_subspace_irq()
608 	    !pchan->plat_irq_ack.gas) {  in pcc_parse_subspace_irq()
619  * @pchan: Pointer to the PCC channel info structure.
624 static int pcc_parse_subspace_db_reg(struct pcc_chan_info *pchan,  in pcc_parse_subspace_db_reg()  argument
634 		ret = pcc_chan_reg_init(&pchan->db,  in pcc_parse_subspace_db_reg()
644 		ret = pcc_chan_reg_init(&pchan->db,  in pcc_parse_subspace_db_reg()
651 		ret = pcc_chan_reg_init(&pchan->cmd_complete,  in pcc_parse_subspace_db_reg()
658 		ret = pcc_chan_reg_init(&pchan->cmd_update,  in pcc_parse_subspace_db_reg()
666 		ret = pcc_chan_reg_init(&pchan->error,  in pcc_parse_subspace_db_reg()
678  * @pchan: Pointer to the PCC channel info structure.
682 static void pcc_parse_subspace_shmem(struct pcc_chan_info *pchan,  in pcc_parse_subspace_shmem()  argument
689 		pchan->chan.shmem_base_addr = pcct_ss->base_address;  in pcc_parse_subspace_shmem()
690 		pchan->chan.shmem_size = pcct_ss->length;  in pcc_parse_subspace_shmem()
691 		pchan->chan.latency = pcct_ss->latency;  in pcc_parse_subspace_shmem()
692 		pchan->chan.max_access_rate = pcct_ss->max_access_rate;  in pcc_parse_subspace_shmem()
693 		pchan->chan.min_turnaround_time = pcct_ss->min_turnaround_time;  in pcc_parse_subspace_shmem()
698 		pchan->chan.shmem_base_addr = pcct_ext->base_address;  in pcc_parse_subspace_shmem()
699 		pchan->chan.shmem_size = pcct_ext->length;  in pcc_parse_subspace_shmem()
700 		pchan->chan.latency = pcct_ext->latency;  in pcc_parse_subspace_shmem()
701 		pchan->chan.max_access_rate = pcct_ext->max_access_rate;  in pcc_parse_subspace_shmem()
702 		pchan->chan.min_turnaround_time = pcct_ext->min_turnaround_time;  in pcc_parse_subspace_shmem()
810 		struct pcc_chan_info *pchan = chan_info + i;  in pcc_mbox_probe()  local
812 		pcc_mbox_channels[i].con_priv = pchan;  in pcc_mbox_probe()
813 		pchan->chan.mchan = &pcc_mbox_channels[i];  in pcc_mbox_probe()
823 			rc = pcc_parse_subspace_irq(pchan, pcct_entry);  in pcc_mbox_probe()
827 		rc = pcc_parse_subspace_db_reg(pchan, pcct_entry);  in pcc_mbox_probe()
831 		pcc_parse_subspace_shmem(pchan, pcct_entry);  in pcc_mbox_probe()
833 		pchan->type = pcct_entry->type;  in pcc_mbox_probe()