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()
94 static struct rcar_pcie_host *msi_to_host(struct rcar_msi *msi) in msi_to_host() argument
96 return container_of(msi, struct rcar_pcie_host, msi); in msi_to_host()
109 " .arch armv7-a\n" \
131 : "+r"(error):"r"(val), "r"(pcie->base + reg) : "memory"); in rcar_pci_write_reg_workaround()
145 : "+r"(error), "=r"(*val) : "r"(pcie->base + reg) : "memory"); in rcar_pci_read_reg_workaround()
160 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_config_access()
165 ret = rcar_pcie_wakeup(pcie->dev, pcie->base); in rcar_pcie_config_access()
177 * While each channel has its own memory-mapped extended config in rcar_pcie_config_access()
185 * the same channel <-> device access works for any PCI_SLOT() in rcar_pcie_config_access()
187 * space to devfn 0 in order to enable self-enumeration. In this in rcar_pcie_config_access()
207 rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | in rcar_pcie_config_access()
211 if (pci_is_root_bus(bus->parent)) in rcar_pcie_config_access()
239 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_read_conf()
252 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()
253 bus->number, devfn, where, size, *val); in rcar_pcie_read_conf()
262 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_write_conf()
272 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()
273 bus->number, devfn, where, size, val); in rcar_pcie_write_conf()
299 struct device *dev = pcie->dev; in rcar_pcie_force_speedup()
329 while (timeout--) { in rcar_pcie_force_speedup()
353 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_hw_enable()
363 resource_list_for_each_entry(win, &bridge->windows) { in rcar_pcie_hw_enable()
364 struct resource *res = win->res; in rcar_pcie_hw_enable()
366 if (!res->flags) in rcar_pcie_hw_enable()
387 bridge->sysdata = host; in rcar_pcie_enable()
388 bridge->ops = &rcar_pcie_ops; in rcar_pcie_enable()
395 struct device *dev = pcie->dev; in phy_wait_for_ack()
398 while (timeout--) { in phy_wait_for_ack()
407 return -ETIMEDOUT; in phy_wait_for_ack()
484 /* Enable MSI */ in rcar_pcie_hw_init()
490 /* Finish initialization - establish a PCI Express link */ in rcar_pcie_hw_init()
508 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_h1()
533 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_gen2()
536 * These settings come from the R-Car Series, 2nd Generation User's in rcar_pcie_phy_init_gen2()
557 err = phy_init(host->phy); in rcar_pcie_phy_init_gen3()
561 err = phy_power_on(host->phy); in rcar_pcie_phy_init_gen3()
563 phy_exit(host->phy); in rcar_pcie_phy_init_gen3()
571 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_msi_irq()
572 struct rcar_msi *msi = &host->msi; in rcar_pcie_msi_irq() local
573 struct device *dev = pcie->dev; in rcar_pcie_msi_irq()
578 /* MSI & INTx share an interrupt - we only handle MSI here */ in rcar_pcie_msi_irq()
586 ret = generic_handle_domain_irq(msi->domain->parent, index); in rcar_pcie_msi_irq()
588 /* Unknown MSI, just clear it */ in rcar_pcie_msi_irq()
589 dev_dbg(dev, "unexpected MSI\n"); in rcar_pcie_msi_irq()
618 .name = "PCIe MSI",
626 struct rcar_msi *msi = irq_data_get_irq_chip_data(d); in rcar_msi_irq_ack() local
627 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_ack()
630 rcar_pci_write_reg(pcie, BIT(d->hwirq), PCIEMSIFR); in rcar_msi_irq_ack()
635 struct rcar_msi *msi = irq_data_get_irq_chip_data(d); in rcar_msi_irq_mask() local
636 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_mask()
640 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_mask()
642 value &= ~BIT(d->hwirq); in rcar_msi_irq_mask()
644 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_mask()
649 struct rcar_msi *msi = irq_data_get_irq_chip_data(d); in rcar_msi_irq_unmask() local
650 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_unmask()
654 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
656 value |= BIT(d->hwirq); in rcar_msi_irq_unmask()
658 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
663 struct rcar_msi *msi = irq_data_get_irq_chip_data(data); in rcar_compose_msi_msg() local
664 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_compose_msi_msg()
666 msg->address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; in rcar_compose_msi_msg()
667 msg->address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); in rcar_compose_msi_msg()
668 msg->data = data->hwirq; in rcar_compose_msi_msg()
672 .name = "R-Car MSI",
682 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_alloc() local
686 mutex_lock(&msi->map_lock); in rcar_msi_domain_alloc()
688 hwirq = bitmap_find_free_region(msi->used, INT_PCI_MSI_NR, order_base_2(nr_irqs)); in rcar_msi_domain_alloc()
690 mutex_unlock(&msi->map_lock); in rcar_msi_domain_alloc()
693 return -ENOSPC; in rcar_msi_domain_alloc()
697 &rcar_msi_bottom_chip, domain->host_data, in rcar_msi_domain_alloc()
707 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_free() local
709 mutex_lock(&msi->map_lock); in rcar_msi_domain_free()
711 bitmap_release_region(msi->used, d->hwirq, order_base_2(nr_irqs)); in rcar_msi_domain_free()
713 mutex_unlock(&msi->map_lock); in rcar_msi_domain_free()
727 static int rcar_allocate_domains(struct rcar_msi *msi) in rcar_allocate_domains() argument
729 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_allocate_domains()
730 struct fwnode_handle *fwnode = dev_fwnode(pcie->dev); in rcar_allocate_domains()
731 struct irq_domain *parent; in rcar_allocate_domains() local
733 parent = irq_domain_create_linear(fwnode, INT_PCI_MSI_NR, in rcar_allocate_domains()
734 &rcar_msi_domain_ops, msi); in rcar_allocate_domains()
735 if (!parent) { in rcar_allocate_domains()
736 dev_err(pcie->dev, "failed to create IRQ domain\n"); in rcar_allocate_domains()
737 return -ENOMEM; in rcar_allocate_domains()
739 irq_domain_update_bus_token(parent, DOMAIN_BUS_NEXUS); in rcar_allocate_domains()
741 msi->domain = pci_msi_create_irq_domain(fwnode, &rcar_msi_info, parent); in rcar_allocate_domains()
742 if (!msi->domain) { in rcar_allocate_domains()
743 dev_err(pcie->dev, "failed to create MSI domain\n"); in rcar_allocate_domains()
744 irq_domain_remove(parent); in rcar_allocate_domains()
745 return -ENOMEM; in rcar_allocate_domains()
751 static void rcar_free_domains(struct rcar_msi *msi) in rcar_free_domains() argument
753 struct irq_domain *parent = msi->domain->parent; in rcar_free_domains() local
755 irq_domain_remove(msi->domain); in rcar_free_domains()
756 irq_domain_remove(parent); in rcar_free_domains()
761 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_enable_msi()
762 struct device *dev = pcie->dev; in rcar_pcie_enable_msi()
763 struct rcar_msi *msi = &host->msi; in rcar_pcie_enable_msi() local
767 mutex_init(&msi->map_lock); in rcar_pcie_enable_msi()
768 spin_lock_init(&msi->mask_lock); in rcar_pcie_enable_msi()
770 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_enable_msi()
774 err = rcar_allocate_domains(msi); in rcar_pcie_enable_msi()
778 /* Two irqs are for MSI, but they are also used for non-MSI irqs */ in rcar_pcie_enable_msi()
779 err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
787 err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
799 * Setup MSI data target using RC base address address, which in rcar_pcie_enable_msi()
800 * is guaranteed to be in the low 32bit range on any R-Car HW. in rcar_pcie_enable_msi()
808 rcar_free_domains(msi); in rcar_pcie_enable_msi()
814 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_teardown_msi()
816 /* Disable all MSI interrupts */ in rcar_pcie_teardown_msi()
819 /* Disable address decoding of the MSI interrupt, MSIFE */ in rcar_pcie_teardown_msi()
822 rcar_free_domains(&host->msi); in rcar_pcie_teardown_msi()
827 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_get_resources()
828 struct device *dev = pcie->dev; in rcar_pcie_get_resources()
832 host->phy = devm_phy_optional_get(dev, "pcie"); in rcar_pcie_get_resources()
833 if (IS_ERR(host->phy)) in rcar_pcie_get_resources()
834 return PTR_ERR(host->phy); in rcar_pcie_get_resources()
836 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_get_resources()
840 pcie->base = devm_ioremap_resource(dev, &res); in rcar_pcie_get_resources()
841 if (IS_ERR(pcie->base)) in rcar_pcie_get_resources()
842 return PTR_ERR(pcie->base); in rcar_pcie_get_resources()
844 host->bus_clk = devm_clk_get(dev, "pcie_bus"); in rcar_pcie_get_resources()
845 if (IS_ERR(host->bus_clk)) { in rcar_pcie_get_resources()
847 return PTR_ERR(host->bus_clk); in rcar_pcie_get_resources()
850 i = irq_of_parse_and_map(dev->of_node, 0); in rcar_pcie_get_resources()
852 dev_err(dev, "cannot get platform resources for msi interrupt\n"); in rcar_pcie_get_resources()
853 err = -ENOENT; in rcar_pcie_get_resources()
856 host->msi.irq1 = i; in rcar_pcie_get_resources()
858 i = irq_of_parse_and_map(dev->of_node, 1); in rcar_pcie_get_resources()
860 dev_err(dev, "cannot get platform resources for msi interrupt\n"); in rcar_pcie_get_resources()
861 err = -ENOENT; in rcar_pcie_get_resources()
864 host->msi.irq2 = i; in rcar_pcie_get_resources()
869 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_get_resources()
878 u64 restype = entry->res->flags; in rcar_pcie_inbound_ranges()
879 u64 cpu_addr = entry->res->start; in rcar_pcie_inbound_ranges()
880 u64 cpu_end = entry->res->end; in rcar_pcie_inbound_ranges()
881 u64 pci_addr = entry->res->start - entry->offset; in rcar_pcie_inbound_ranges()
884 u64 size = resource_size(entry->res); in rcar_pcie_inbound_ranges()
891 if (idx >= MAX_NR_INBOUND_MAPS - 1) { in rcar_pcie_inbound_ranges()
892 dev_err(pcie->dev, "Failed to map inbound regions!\n"); in rcar_pcie_inbound_ranges()
893 return -EINVAL; in rcar_pcie_inbound_ranges()
909 mask = roundup_pow_of_two(size) - 1; in rcar_pcie_inbound_ranges()
930 resource_list_for_each_entry(entry, &bridge->dma_ranges) { in rcar_pcie_parse_map_dma_ranges()
931 err = rcar_pcie_inbound_ranges(&host->pcie, entry, &index); in rcar_pcie_parse_map_dma_ranges()
940 { .compatible = "renesas,pcie-r8a7779",
942 { .compatible = "renesas,pcie-r8a7790",
944 { .compatible = "renesas,pcie-r8a7791",
946 { .compatible = "renesas,pcie-rcar-gen2",
948 { .compatible = "renesas,pcie-r8a7795",
950 { .compatible = "renesas,pcie-rcar-gen3",
964 struct device *dev = &pdev->dev; in rcar_pcie_probe()
974 return -ENOMEM; in rcar_pcie_probe()
977 pcie = &host->pcie; in rcar_pcie_probe()
978 pcie->dev = dev; in rcar_pcie_probe()
983 if (err < 0 && err != -ENODEV) in rcar_pcie_probe()
988 pm_runtime_enable(pcie->dev); in rcar_pcie_probe()
989 err = pm_runtime_get_sync(pcie->dev); in rcar_pcie_probe()
991 dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); in rcar_pcie_probe()
1001 err = clk_prepare_enable(host->bus_clk); in rcar_pcie_probe()
1011 host->phy_init_fn = of_device_get_match_data(dev); in rcar_pcie_probe()
1012 err = host->phy_init_fn(host); in rcar_pcie_probe()
1021 err = -ENODEV; in rcar_pcie_probe()
1032 "failed to enable MSI support: %d\n", in rcar_pcie_probe()
1049 if (host->phy) { in rcar_pcie_probe()
1050 phy_power_off(host->phy); in rcar_pcie_probe()
1051 phy_exit(host->phy); in rcar_pcie_probe()
1055 clk_disable_unprepare(host->bus_clk); in rcar_pcie_probe()
1058 irq_dispose_mapping(host->msi.irq2); in rcar_pcie_probe()
1059 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_probe()
1071 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume()
1080 err = host->phy_init_fn(host); in rcar_pcie_resume()
1089 /* Enable MSI */ in rcar_pcie_resume()
1094 of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_resume()
1098 bitmap_to_arr32(&val, host->msi.used, INT_PCI_MSI_NR); in rcar_pcie_resume()
1110 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume_noirq()
1116 /* Re-establish the PCIe link */ in rcar_pcie_resume_noirq()
1129 .name = "rcar-pcie",
1145 { .compatible = "renesas,pcie-r8a7779" },
1146 { .compatible = "renesas,pcie-r8a7790" },
1147 { .compatible = "renesas,pcie-r8a7791" },
1148 { .compatible = "renesas,pcie-rcar-gen2" },