Lines Matching +full:msi +full:- +full:parent
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
16 #include <linux/clk-provider.h>
24 #include <linux/msi.h>
34 #include "pcie-rcar.h"
50 struct rcar_msi msi; member
65 ret = -EINVAL; in rcar_pcie_wakeup()
90 static struct rcar_pcie_host *msi_to_host(struct rcar_msi *msi) in msi_to_host() argument
92 return container_of(msi, struct rcar_pcie_host, msi); in msi_to_host()
105 " .arch armv7-a\n" \
127 : "+r"(error):"r"(val), "r"(pcie->base + reg) : "memory"); in rcar_pci_write_reg_workaround()
141 : "+r"(error), "=r"(*val) : "r"(pcie->base + reg) : "memory"); in rcar_pci_read_reg_workaround()
156 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_config_access()
161 ret = rcar_pcie_wakeup(pcie->dev, pcie->base); in rcar_pcie_config_access()
173 * While each channel has its own memory-mapped extended config in rcar_pcie_config_access()
181 * the same channel <-> device access works for any PCI_SLOT() in rcar_pcie_config_access()
183 * space to devfn 0 in order to enable self-enumeration. In this in rcar_pcie_config_access()
203 rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | in rcar_pcie_config_access()
207 if (pci_is_root_bus(bus->parent)) in rcar_pcie_config_access()
235 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_read_conf()
248 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()
249 bus->number, devfn, where, size, *val); in rcar_pcie_read_conf()
258 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_write_conf()
268 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()
269 bus->number, devfn, where, size, val); in rcar_pcie_write_conf()
295 struct device *dev = pcie->dev; in rcar_pcie_force_speedup()
325 while (timeout--) { in rcar_pcie_force_speedup()
349 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_hw_enable()
359 resource_list_for_each_entry(win, &bridge->windows) { in rcar_pcie_hw_enable()
360 struct resource *res = win->res; in rcar_pcie_hw_enable()
362 if (!res->flags) in rcar_pcie_hw_enable()
383 bridge->sysdata = host; in rcar_pcie_enable()
384 bridge->ops = &rcar_pcie_ops; in rcar_pcie_enable()
391 struct device *dev = pcie->dev; in phy_wait_for_ack()
394 while (timeout--) { in phy_wait_for_ack()
403 return -ETIMEDOUT; in phy_wait_for_ack()
480 /* Enable MSI */ in rcar_pcie_hw_init()
486 /* Finish initialization - establish a PCI Express link */ in rcar_pcie_hw_init()
504 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_h1()
529 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_gen2()
532 * These settings come from the R-Car Series, 2nd Generation User's in rcar_pcie_phy_init_gen2()
553 err = phy_init(host->phy); in rcar_pcie_phy_init_gen3()
557 err = phy_power_on(host->phy); in rcar_pcie_phy_init_gen3()
559 phy_exit(host->phy); in rcar_pcie_phy_init_gen3()
567 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_msi_irq()
568 struct rcar_msi *msi = &host->msi; in rcar_pcie_msi_irq() local
569 struct device *dev = pcie->dev; in rcar_pcie_msi_irq()
574 /* MSI & INTx share an interrupt - we only handle MSI here */ in rcar_pcie_msi_irq()
582 ret = generic_handle_domain_irq(msi->domain->parent, index); in rcar_pcie_msi_irq()
584 /* Unknown MSI, just clear it */ in rcar_pcie_msi_irq()
585 dev_dbg(dev, "unexpected MSI\n"); in rcar_pcie_msi_irq()
614 .name = "PCIe MSI",
622 struct rcar_msi *msi = irq_data_get_irq_chip_data(d); in rcar_msi_irq_ack() local
623 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_ack()
626 rcar_pci_write_reg(pcie, BIT(d->hwirq), PCIEMSIFR); in rcar_msi_irq_ack()
631 struct rcar_msi *msi = irq_data_get_irq_chip_data(d); in rcar_msi_irq_mask() local
632 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_mask()
636 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_mask()
638 value &= ~BIT(d->hwirq); in rcar_msi_irq_mask()
640 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_mask()
645 struct rcar_msi *msi = irq_data_get_irq_chip_data(d); in rcar_msi_irq_unmask() local
646 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_unmask()
650 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
652 value |= BIT(d->hwirq); in rcar_msi_irq_unmask()
654 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
659 return -EINVAL; in rcar_msi_set_affinity()
664 struct rcar_msi *msi = irq_data_get_irq_chip_data(data); in rcar_compose_msi_msg() local
665 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_compose_msi_msg()
667 msg->address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; in rcar_compose_msi_msg()
668 msg->address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); in rcar_compose_msi_msg()
669 msg->data = data->hwirq; in rcar_compose_msi_msg()
673 .name = "R-Car MSI",
684 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_alloc() local
688 mutex_lock(&msi->map_lock); in rcar_msi_domain_alloc()
690 hwirq = bitmap_find_free_region(msi->used, INT_PCI_MSI_NR, order_base_2(nr_irqs)); in rcar_msi_domain_alloc()
692 mutex_unlock(&msi->map_lock); in rcar_msi_domain_alloc()
695 return -ENOSPC; in rcar_msi_domain_alloc()
699 &rcar_msi_bottom_chip, domain->host_data, in rcar_msi_domain_alloc()
709 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_free() local
711 mutex_lock(&msi->map_lock); in rcar_msi_domain_free()
713 bitmap_release_region(msi->used, d->hwirq, order_base_2(nr_irqs)); in rcar_msi_domain_free()
715 mutex_unlock(&msi->map_lock); in rcar_msi_domain_free()
729 static int rcar_allocate_domains(struct rcar_msi *msi) in rcar_allocate_domains() argument
731 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_allocate_domains()
732 struct fwnode_handle *fwnode = dev_fwnode(pcie->dev); in rcar_allocate_domains()
733 struct irq_domain *parent; in rcar_allocate_domains() local
735 parent = irq_domain_create_linear(fwnode, INT_PCI_MSI_NR, in rcar_allocate_domains()
736 &rcar_msi_domain_ops, msi); in rcar_allocate_domains()
737 if (!parent) { in rcar_allocate_domains()
738 dev_err(pcie->dev, "failed to create IRQ domain\n"); in rcar_allocate_domains()
739 return -ENOMEM; in rcar_allocate_domains()
741 irq_domain_update_bus_token(parent, DOMAIN_BUS_NEXUS); in rcar_allocate_domains()
743 msi->domain = pci_msi_create_irq_domain(fwnode, &rcar_msi_info, parent); in rcar_allocate_domains()
744 if (!msi->domain) { in rcar_allocate_domains()
745 dev_err(pcie->dev, "failed to create MSI domain\n"); in rcar_allocate_domains()
746 irq_domain_remove(parent); in rcar_allocate_domains()
747 return -ENOMEM; in rcar_allocate_domains()
753 static void rcar_free_domains(struct rcar_msi *msi) in rcar_free_domains() argument
755 struct irq_domain *parent = msi->domain->parent; in rcar_free_domains() local
757 irq_domain_remove(msi->domain); in rcar_free_domains()
758 irq_domain_remove(parent); in rcar_free_domains()
763 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_enable_msi()
764 struct device *dev = pcie->dev; in rcar_pcie_enable_msi()
765 struct rcar_msi *msi = &host->msi; in rcar_pcie_enable_msi() local
769 mutex_init(&msi->map_lock); in rcar_pcie_enable_msi()
770 spin_lock_init(&msi->mask_lock); in rcar_pcie_enable_msi()
772 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_enable_msi()
776 err = rcar_allocate_domains(msi); in rcar_pcie_enable_msi()
780 /* Two irqs are for MSI, but they are also used for non-MSI irqs */ in rcar_pcie_enable_msi()
781 err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
789 err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
801 * Setup MSI data target using RC base address address, which in rcar_pcie_enable_msi()
802 * is guaranteed to be in the low 32bit range on any R-Car HW. in rcar_pcie_enable_msi()
810 rcar_free_domains(msi); in rcar_pcie_enable_msi()
816 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_teardown_msi()
818 /* Disable all MSI interrupts */ in rcar_pcie_teardown_msi()
821 /* Disable address decoding of the MSI interrupt, MSIFE */ in rcar_pcie_teardown_msi()
824 rcar_free_domains(&host->msi); in rcar_pcie_teardown_msi()
829 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_get_resources()
830 struct device *dev = pcie->dev; in rcar_pcie_get_resources()
834 host->phy = devm_phy_optional_get(dev, "pcie"); in rcar_pcie_get_resources()
835 if (IS_ERR(host->phy)) in rcar_pcie_get_resources()
836 return PTR_ERR(host->phy); in rcar_pcie_get_resources()
838 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_get_resources()
842 pcie->base = devm_ioremap_resource(dev, &res); in rcar_pcie_get_resources()
843 if (IS_ERR(pcie->base)) in rcar_pcie_get_resources()
844 return PTR_ERR(pcie->base); in rcar_pcie_get_resources()
846 host->bus_clk = devm_clk_get(dev, "pcie_bus"); in rcar_pcie_get_resources()
847 if (IS_ERR(host->bus_clk)) { in rcar_pcie_get_resources()
849 return PTR_ERR(host->bus_clk); in rcar_pcie_get_resources()
852 i = irq_of_parse_and_map(dev->of_node, 0); in rcar_pcie_get_resources()
854 dev_err(dev, "cannot get platform resources for msi interrupt\n"); in rcar_pcie_get_resources()
855 err = -ENOENT; in rcar_pcie_get_resources()
858 host->msi.irq1 = i; in rcar_pcie_get_resources()
860 i = irq_of_parse_and_map(dev->of_node, 1); in rcar_pcie_get_resources()
862 dev_err(dev, "cannot get platform resources for msi interrupt\n"); in rcar_pcie_get_resources()
863 err = -ENOENT; in rcar_pcie_get_resources()
866 host->msi.irq2 = i; in rcar_pcie_get_resources()
871 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_get_resources()
880 u64 restype = entry->res->flags; in rcar_pcie_inbound_ranges()
881 u64 cpu_addr = entry->res->start; in rcar_pcie_inbound_ranges()
882 u64 cpu_end = entry->res->end; in rcar_pcie_inbound_ranges()
883 u64 pci_addr = entry->res->start - entry->offset; in rcar_pcie_inbound_ranges()
886 u64 size = resource_size(entry->res); in rcar_pcie_inbound_ranges()
893 if (idx >= MAX_NR_INBOUND_MAPS - 1) { in rcar_pcie_inbound_ranges()
894 dev_err(pcie->dev, "Failed to map inbound regions!\n"); in rcar_pcie_inbound_ranges()
895 return -EINVAL; in rcar_pcie_inbound_ranges()
911 mask = roundup_pow_of_two(size) - 1; in rcar_pcie_inbound_ranges()
932 resource_list_for_each_entry(entry, &bridge->dma_ranges) { in rcar_pcie_parse_map_dma_ranges()
933 err = rcar_pcie_inbound_ranges(&host->pcie, entry, &index); in rcar_pcie_parse_map_dma_ranges()
942 { .compatible = "renesas,pcie-r8a7779",
944 { .compatible = "renesas,pcie-r8a7790",
946 { .compatible = "renesas,pcie-r8a7791",
948 { .compatible = "renesas,pcie-rcar-gen2",
950 { .compatible = "renesas,pcie-r8a7795",
952 { .compatible = "renesas,pcie-rcar-gen3",
966 struct device *dev = &pdev->dev; in rcar_pcie_probe()
976 return -ENOMEM; in rcar_pcie_probe()
979 pcie = &host->pcie; in rcar_pcie_probe()
980 pcie->dev = dev; in rcar_pcie_probe()
985 if (err < 0 && err != -ENODEV) in rcar_pcie_probe()
990 pm_runtime_enable(pcie->dev); in rcar_pcie_probe()
991 err = pm_runtime_get_sync(pcie->dev); in rcar_pcie_probe()
993 dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); in rcar_pcie_probe()
1003 err = clk_prepare_enable(host->bus_clk); in rcar_pcie_probe()
1013 host->phy_init_fn = of_device_get_match_data(dev); in rcar_pcie_probe()
1014 err = host->phy_init_fn(host); in rcar_pcie_probe()
1023 err = -ENODEV; in rcar_pcie_probe()
1034 "failed to enable MSI support: %d\n", in rcar_pcie_probe()
1051 if (host->phy) { in rcar_pcie_probe()
1052 phy_power_off(host->phy); in rcar_pcie_probe()
1053 phy_exit(host->phy); in rcar_pcie_probe()
1057 clk_disable_unprepare(host->bus_clk); in rcar_pcie_probe()
1060 irq_dispose_mapping(host->msi.irq2); in rcar_pcie_probe()
1061 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_probe()
1073 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume()
1082 err = host->phy_init_fn(host); in rcar_pcie_resume()
1091 /* Enable MSI */ in rcar_pcie_resume()
1096 of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_resume()
1100 bitmap_to_arr32(&val, host->msi.used, INT_PCI_MSI_NR); in rcar_pcie_resume()
1112 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume_noirq()
1118 /* Re-establish the PCIe link */ in rcar_pcie_resume_noirq()
1131 .name = "rcar-pcie",
1147 { .compatible = "renesas,pcie-r8a7779" },
1148 { .compatible = "renesas,pcie-r8a7790" },
1149 { .compatible = "renesas,pcie-r8a7791" },
1150 { .compatible = "renesas,pcie-rcar-gen2" },