Lines Matching +full:msi +full:- +full:x
1 // SPDX-License-Identifier: GPL-2.0
3 * PCIe driver for Renesas R-Car SoCs
4 * Copyright (C) 2014-2020 Renesas Electronics Europe Ltd
7 * arch/sh/drivers/pci/pcie-sh7786.c
8 * arch/sh/drivers/pci/ops-sh7786.c
9 * Copyright (C) 2009 - 2011 Paul Mundt
22 #include <linux/msi.h>
33 #include "pcie-rcar.h"
57 struct rcar_msi msi; member
74 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_config_access()
83 * While each channel has its own memory-mapped extended config in rcar_pcie_config_access()
91 * the same channel <-> device access works for any PCI_SLOT() in rcar_pcie_config_access()
93 * space to devfn 0 in order to enable self-enumeration. In this in rcar_pcie_config_access()
113 rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | in rcar_pcie_config_access()
117 if (pci_is_root_bus(bus->parent)) in rcar_pcie_config_access()
145 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_read_conf()
160 dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", in rcar_pcie_read_conf()
161 bus->number, devfn, where, size, *val); in rcar_pcie_read_conf()
170 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_write_conf()
180 dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", in rcar_pcie_write_conf()
181 bus->number, devfn, where, size, val); in rcar_pcie_write_conf()
207 struct device *dev = pcie->dev; in rcar_pcie_force_speedup()
237 while (timeout--) { in rcar_pcie_force_speedup()
261 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_hw_enable()
271 resource_list_for_each_entry(win, &bridge->windows) { in rcar_pcie_hw_enable()
272 struct resource *res = win->res; in rcar_pcie_hw_enable()
274 if (!res->flags) in rcar_pcie_hw_enable()
295 bridge->sysdata = host; in rcar_pcie_enable()
296 bridge->ops = &rcar_pcie_ops; in rcar_pcie_enable()
298 bridge->msi = &host->msi.chip; in rcar_pcie_enable()
305 struct device *dev = pcie->dev; in phy_wait_for_ack()
308 while (timeout--) { in phy_wait_for_ack()
317 return -ETIMEDOUT; in phy_wait_for_ack()
394 /* Enable MSI */ in rcar_pcie_hw_init()
400 /* Finish initialization - establish a PCI Express link */ in rcar_pcie_hw_init()
418 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_h1()
443 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_gen2()
446 * These settings come from the R-Car Series, 2nd Generation User's in rcar_pcie_phy_init_gen2()
467 err = phy_init(host->phy); in rcar_pcie_phy_init_gen3()
471 err = phy_power_on(host->phy); in rcar_pcie_phy_init_gen3()
473 phy_exit(host->phy); in rcar_pcie_phy_init_gen3()
480 int msi; in rcar_msi_alloc() local
482 mutex_lock(&chip->lock); in rcar_msi_alloc()
484 msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR); in rcar_msi_alloc()
485 if (msi < INT_PCI_MSI_NR) in rcar_msi_alloc()
486 set_bit(msi, chip->used); in rcar_msi_alloc()
488 msi = -ENOSPC; in rcar_msi_alloc()
490 mutex_unlock(&chip->lock); in rcar_msi_alloc()
492 return msi; in rcar_msi_alloc()
497 int msi; in rcar_msi_alloc_region() local
499 mutex_lock(&chip->lock); in rcar_msi_alloc_region()
500 msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR, in rcar_msi_alloc_region()
502 mutex_unlock(&chip->lock); in rcar_msi_alloc_region()
504 return msi; in rcar_msi_alloc_region()
509 mutex_lock(&chip->lock); in rcar_msi_free()
510 clear_bit(irq, chip->used); in rcar_msi_free()
511 mutex_unlock(&chip->lock); in rcar_msi_free()
517 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_msi_irq()
518 struct rcar_msi *msi = &host->msi; in rcar_pcie_msi_irq() local
519 struct device *dev = pcie->dev; in rcar_pcie_msi_irq()
524 /* MSI & INTx share an interrupt - we only handle MSI here */ in rcar_pcie_msi_irq()
535 msi_irq = irq_find_mapping(msi->domain, index); in rcar_pcie_msi_irq()
537 if (test_bit(index, msi->used)) in rcar_pcie_msi_irq()
540 dev_info(dev, "unhandled MSI\n"); in rcar_pcie_msi_irq()
542 /* Unknown MSI, just clear it */ in rcar_pcie_msi_irq()
543 dev_dbg(dev, "unexpected MSI\n"); in rcar_pcie_msi_irq()
556 struct rcar_msi *msi = to_rcar_msi(chip); in rcar_msi_setup_irq() local
558 msi.chip); in rcar_msi_setup_irq()
559 struct rcar_pcie *pcie = &host->pcie; in rcar_msi_setup_irq()
564 hwirq = rcar_msi_alloc(msi); in rcar_msi_setup_irq()
568 irq = irq_find_mapping(msi->domain, hwirq); in rcar_msi_setup_irq()
570 rcar_msi_free(msi, hwirq); in rcar_msi_setup_irq()
571 return -EINVAL; in rcar_msi_setup_irq()
588 struct rcar_msi *msi = to_rcar_msi(chip); in rcar_msi_setup_irqs() local
590 msi.chip); in rcar_msi_setup_irqs()
591 struct rcar_pcie *pcie = &host->pcie; in rcar_msi_setup_irqs()
598 /* MSI-X interrupts are not supported */ in rcar_msi_setup_irqs()
600 return -EINVAL; in rcar_msi_setup_irqs()
602 WARN_ON(!list_is_singular(&pdev->dev.msi_list)); in rcar_msi_setup_irqs()
603 desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); in rcar_msi_setup_irqs()
605 hwirq = rcar_msi_alloc_region(msi, nvec); in rcar_msi_setup_irqs()
607 return -ENOSPC; in rcar_msi_setup_irqs()
609 irq = irq_find_mapping(msi->domain, hwirq); in rcar_msi_setup_irqs()
611 return -ENOSPC; in rcar_msi_setup_irqs()
615 * irq_create_mapping() called from rcar_pcie_probe() pre- in rcar_msi_setup_irqs()
618 * returns non-zero, then the descs are also successfully in rcar_msi_setup_irqs()
623 return -EINVAL; in rcar_msi_setup_irqs()
627 desc->nvec_used = nvec; in rcar_msi_setup_irqs()
628 desc->msi_attrib.multiple = order_base_2(nvec); in rcar_msi_setup_irqs()
641 struct rcar_msi *msi = to_rcar_msi(chip); in rcar_msi_teardown_irq() local
644 rcar_msi_free(msi, d->hwirq); in rcar_msi_teardown_irq()
648 .name = "R-Car PCIe MSI",
659 irq_set_chip_data(irq, domain->host_data); in rcar_msi_map()
670 struct rcar_msi *msi = &host->msi; in rcar_pcie_unmap_msi() local
674 irq = irq_find_mapping(msi->domain, i); in rcar_pcie_unmap_msi()
679 irq_domain_remove(msi->domain); in rcar_pcie_unmap_msi()
684 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_hw_enable_msi()
685 struct rcar_msi *msi = &host->msi; in rcar_pcie_hw_enable_msi() local
688 /* setup MSI data target */ in rcar_pcie_hw_enable_msi()
689 base = virt_to_phys((void *)msi->pages); in rcar_pcie_hw_enable_msi()
694 /* enable all MSI interrupts */ in rcar_pcie_hw_enable_msi()
700 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_enable_msi()
701 struct device *dev = pcie->dev; in rcar_pcie_enable_msi()
702 struct rcar_msi *msi = &host->msi; in rcar_pcie_enable_msi() local
705 mutex_init(&msi->lock); in rcar_pcie_enable_msi()
707 msi->chip.dev = dev; in rcar_pcie_enable_msi()
708 msi->chip.setup_irq = rcar_msi_setup_irq; in rcar_pcie_enable_msi()
709 msi->chip.setup_irqs = rcar_msi_setup_irqs; in rcar_pcie_enable_msi()
710 msi->chip.teardown_irq = rcar_msi_teardown_irq; in rcar_pcie_enable_msi()
712 msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR, in rcar_pcie_enable_msi()
713 &msi_domain_ops, &msi->chip); in rcar_pcie_enable_msi()
714 if (!msi->domain) { in rcar_pcie_enable_msi()
716 return -ENOMEM; in rcar_pcie_enable_msi()
720 irq_create_mapping(msi->domain, i); in rcar_pcie_enable_msi()
722 /* Two irqs are for MSI, but they are also used for non-MSI irqs */ in rcar_pcie_enable_msi()
723 err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
731 err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
739 /* setup MSI data target */ in rcar_pcie_enable_msi()
740 msi->pages = __get_free_pages(GFP_KERNEL, 0); in rcar_pcie_enable_msi()
752 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_teardown_msi()
753 struct rcar_msi *msi = &host->msi; in rcar_pcie_teardown_msi() local
755 /* Disable all MSI interrupts */ in rcar_pcie_teardown_msi()
758 /* Disable address decoding of the MSI interrupt, MSIFE */ in rcar_pcie_teardown_msi()
761 free_pages(msi->pages, 0); in rcar_pcie_teardown_msi()
768 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_get_resources()
769 struct device *dev = pcie->dev; in rcar_pcie_get_resources()
773 host->phy = devm_phy_optional_get(dev, "pcie"); in rcar_pcie_get_resources()
774 if (IS_ERR(host->phy)) in rcar_pcie_get_resources()
775 return PTR_ERR(host->phy); in rcar_pcie_get_resources()
777 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_get_resources()
781 pcie->base = devm_ioremap_resource(dev, &res); in rcar_pcie_get_resources()
782 if (IS_ERR(pcie->base)) in rcar_pcie_get_resources()
783 return PTR_ERR(pcie->base); in rcar_pcie_get_resources()
785 host->bus_clk = devm_clk_get(dev, "pcie_bus"); in rcar_pcie_get_resources()
786 if (IS_ERR(host->bus_clk)) { in rcar_pcie_get_resources()
788 return PTR_ERR(host->bus_clk); in rcar_pcie_get_resources()
791 i = irq_of_parse_and_map(dev->of_node, 0); in rcar_pcie_get_resources()
793 dev_err(dev, "cannot get platform resources for msi interrupt\n"); in rcar_pcie_get_resources()
794 err = -ENOENT; in rcar_pcie_get_resources()
797 host->msi.irq1 = i; in rcar_pcie_get_resources()
799 i = irq_of_parse_and_map(dev->of_node, 1); in rcar_pcie_get_resources()
801 dev_err(dev, "cannot get platform resources for msi interrupt\n"); in rcar_pcie_get_resources()
802 err = -ENOENT; in rcar_pcie_get_resources()
805 host->msi.irq2 = i; in rcar_pcie_get_resources()
810 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_get_resources()
819 u64 restype = entry->res->flags; in rcar_pcie_inbound_ranges()
820 u64 cpu_addr = entry->res->start; in rcar_pcie_inbound_ranges()
821 u64 cpu_end = entry->res->end; in rcar_pcie_inbound_ranges()
822 u64 pci_addr = entry->res->start - entry->offset; in rcar_pcie_inbound_ranges()
825 u64 size = resource_size(entry->res); in rcar_pcie_inbound_ranges()
832 if (idx >= MAX_NR_INBOUND_MAPS - 1) { in rcar_pcie_inbound_ranges()
833 dev_err(pcie->dev, "Failed to map inbound regions!\n"); in rcar_pcie_inbound_ranges()
834 return -EINVAL; in rcar_pcie_inbound_ranges()
850 mask = roundup_pow_of_two(size) - 1; in rcar_pcie_inbound_ranges()
871 resource_list_for_each_entry(entry, &bridge->dma_ranges) { in rcar_pcie_parse_map_dma_ranges()
872 err = rcar_pcie_inbound_ranges(&host->pcie, entry, &index); in rcar_pcie_parse_map_dma_ranges()
881 { .compatible = "renesas,pcie-r8a7779",
883 { .compatible = "renesas,pcie-r8a7790",
885 { .compatible = "renesas,pcie-r8a7791",
887 { .compatible = "renesas,pcie-rcar-gen2",
889 { .compatible = "renesas,pcie-r8a7795",
891 { .compatible = "renesas,pcie-rcar-gen3",
898 struct device *dev = &pdev->dev; in rcar_pcie_probe()
907 return -ENOMEM; in rcar_pcie_probe()
910 pcie = &host->pcie; in rcar_pcie_probe()
911 pcie->dev = dev; in rcar_pcie_probe()
914 pm_runtime_enable(pcie->dev); in rcar_pcie_probe()
915 err = pm_runtime_get_sync(pcie->dev); in rcar_pcie_probe()
917 dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); in rcar_pcie_probe()
927 err = clk_prepare_enable(host->bus_clk); in rcar_pcie_probe()
937 host->phy_init_fn = of_device_get_match_data(dev); in rcar_pcie_probe()
938 err = host->phy_init_fn(host); in rcar_pcie_probe()
947 err = -ENODEV; in rcar_pcie_probe()
952 dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); in rcar_pcie_probe()
958 "failed to enable MSI support: %d\n", in rcar_pcie_probe()
975 if (host->phy) { in rcar_pcie_probe()
976 phy_power_off(host->phy); in rcar_pcie_probe()
977 phy_exit(host->phy); in rcar_pcie_probe()
981 clk_disable_unprepare(host->bus_clk); in rcar_pcie_probe()
984 irq_dispose_mapping(host->msi.irq2); in rcar_pcie_probe()
985 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_probe()
997 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume()
1006 err = host->phy_init_fn(host); in rcar_pcie_resume()
1013 dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); in rcar_pcie_resume()
1015 /* Enable MSI */ in rcar_pcie_resume()
1027 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume_noirq()
1033 /* Re-establish the PCIe link */ in rcar_pcie_resume_noirq()
1046 .name = "rcar-pcie",