diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index f872c57e99095b49b490fef05add9eb1e1a86b1c..fd9a7bed83ce8ce85603b4b14aa91fecf695b02d 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -6,28 +6,7 @@ * Copyright (C) 2014 ARM Ltd. */ -#include -#include -#include -#include -#include #include -#include -#include -#include - -#ifdef CONFIG_ACPI -/* - * Try to assign the IRQ number when probing a new device - */ -int pcibios_alloc_irq(struct pci_dev *dev) -{ - if (!acpi_disabled) - acpi_pci_irq_enable(dev); - - return 0; -} -#endif /* * raw_pci_read/write - Platform-specific PCI config space access. @@ -61,173 +40,3 @@ int pcibus_to_node(struct pci_bus *bus) EXPORT_SYMBOL(pcibus_to_node); #endif - -#ifdef CONFIG_ACPI - -struct acpi_pci_generic_root_info { - struct acpi_pci_root_info common; - struct pci_config_window *cfg; /* config space mapping */ -}; - -int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) -{ - struct pci_config_window *cfg = bus->sysdata; - struct acpi_device *adev = to_acpi_device(cfg->parent); - struct acpi_pci_root *root = acpi_driver_data(adev); - - return root->segment; -} - -int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) -{ - struct pci_config_window *cfg; - struct acpi_device *adev; - struct device *bus_dev; - - if (acpi_disabled) - return 0; - - cfg = bridge->bus->sysdata; - - /* - * On Hyper-V there is no corresponding ACPI device for a root bridge, - * therefore ->parent is set as NULL by the driver. And set 'adev' as - * NULL in this case because there is no proper ACPI device. - */ - if (!cfg->parent) - adev = NULL; - else - adev = to_acpi_device(cfg->parent); - - bus_dev = &bridge->bus->dev; - - ACPI_COMPANION_SET(&bridge->dev, adev); - set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev))); - - return 0; -} - -static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci) -{ - struct resource_entry *entry, *tmp; - int status; - - status = acpi_pci_probe_root_resources(ci); - resource_list_for_each_entry_safe(entry, tmp, &ci->resources) { - if (!(entry->res->flags & IORESOURCE_WINDOW)) - resource_list_destroy_entry(entry); - } - return status; -} - -/* - * Lookup the bus range for the domain in MCFG, and set up config space - * mapping. - */ -static struct pci_config_window * -pci_acpi_setup_ecam_mapping(struct acpi_pci_root *root) -{ - struct device *dev = &root->device->dev; - struct resource *bus_res = &root->secondary; - u16 seg = root->segment; - const struct pci_ecam_ops *ecam_ops; - struct resource cfgres; - struct acpi_device *adev; - struct pci_config_window *cfg; - int ret; - - ret = pci_mcfg_lookup(root, &cfgres, &ecam_ops); - if (ret) { - dev_err(dev, "%04x:%pR ECAM region not found\n", seg, bus_res); - return NULL; - } - - adev = acpi_resource_consumer(&cfgres); - if (adev) - dev_info(dev, "ECAM area %pR reserved by %s\n", &cfgres, - dev_name(&adev->dev)); - else - dev_warn(dev, FW_BUG "ECAM area %pR not reserved in ACPI namespace\n", - &cfgres); - - cfg = pci_ecam_create(dev, &cfgres, bus_res, ecam_ops); - if (IS_ERR(cfg)) { - dev_err(dev, "%04x:%pR error %ld mapping ECAM\n", seg, bus_res, - PTR_ERR(cfg)); - return NULL; - } - - return cfg; -} - -/* release_info: free resources allocated by init_info */ -static void pci_acpi_generic_release_info(struct acpi_pci_root_info *ci) -{ - struct acpi_pci_generic_root_info *ri; - - ri = container_of(ci, struct acpi_pci_generic_root_info, common); - pci_ecam_free(ri->cfg); - kfree(ci->ops); - kfree(ri); -} - -/* Interface called from ACPI code to setup PCI host controller */ -struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) -{ - struct acpi_pci_generic_root_info *ri; - struct pci_bus *bus, *child; - struct acpi_pci_root_ops *root_ops; - struct pci_host_bridge *host; - - ri = kzalloc(sizeof(*ri), GFP_KERNEL); - if (!ri) - return NULL; - - root_ops = kzalloc(sizeof(*root_ops), GFP_KERNEL); - if (!root_ops) { - kfree(ri); - return NULL; - } - - ri->cfg = pci_acpi_setup_ecam_mapping(root); - if (!ri->cfg) { - kfree(ri); - kfree(root_ops); - return NULL; - } - - root_ops->release_info = pci_acpi_generic_release_info; - root_ops->prepare_resources = pci_acpi_root_prepare_resources; - root_ops->pci_ops = (struct pci_ops *)&ri->cfg->ops->pci_ops; - bus = acpi_pci_root_create(root, root_ops, &ri->common, ri->cfg); - if (!bus) - return NULL; - - /* If we must preserve the resource configuration, claim now */ - host = pci_find_host_bridge(bus); - if (host->preserve_config) - pci_bus_claim_resources(bus); - - /* - * Assign whatever was left unassigned. If we didn't claim above, - * this will reassign everything. - */ - pci_assign_unassigned_root_bus_resources(bus); - - list_for_each_entry(child, &bus->children, node) - pcie_bus_configure_settings(child); - - return bus; -} - -void pcibios_add_bus(struct pci_bus *bus) -{ - acpi_pci_add_bus(bus); -} - -void pcibios_remove_bus(struct pci_bus *bus) -{ - acpi_pci_remove_bus(bus); -} - -#endif diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 59cfd3de33b77e45f89b69ece88807f8fb011252..ef45e9699722a06305792e33f2a0e01b90b786e5 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -13,7 +13,9 @@ config 32BIT config RISCV def_bool y select ACPI_GENERIC_GSI if ACPI + select ACPI_MCFG if (ACPI && PCI) select ACPI_REDUCED_HARDWARE_ONLY if ACPI + select ACPI_SPCR_TABLE if ACPI select ARCH_DMA_DEFAULT_COHERENT select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 @@ -152,6 +154,7 @@ config RISCV select OF_EARLY_FLATTREE select OF_IRQ select PCI_DOMAINS_GENERIC if PCI + select PCI_ECAM if (ACPI && PCI) select PCI_MSI if PCI select RISCV_ALTERNATIVE if !XIP_KERNEL select RISCV_APLIC diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h index 8e10a94430a2c2bc6228ac7141f16ba832b474c0..7e9a84a005edffa41dfb08e003ff0bfa4980d819 100644 --- a/arch/riscv/include/asm/irq.h +++ b/arch/riscv/include/asm/irq.h @@ -12,8 +12,63 @@ #include +#define INVALID_CONTEXT UINT_MAX + void riscv_set_intc_hwnode_fn(struct fwnode_handle *(*fn)(void)); struct fwnode_handle *riscv_get_intc_hwnode(void); +#ifdef CONFIG_ACPI + +enum riscv_irqchip_type { + ACPI_RISCV_IRQCHIP_INTC = 0x00, + ACPI_RISCV_IRQCHIP_IMSIC = 0x01, + ACPI_RISCV_IRQCHIP_PLIC = 0x02, + ACPI_RISCV_IRQCHIP_APLIC = 0x03, +}; + +int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base, + u32 *id, u32 *nr_irqs, u32 *nr_idcs); +struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi); +unsigned long acpi_rintc_index_to_hartid(u32 index); +unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int ctxt_idx); +unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id); +unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx); +int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res); + +#else +static inline int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base, + u32 *id, u32 *nr_irqs, u32 *nr_idcs) +{ + return 0; +} + +static inline unsigned long acpi_rintc_index_to_hartid(u32 index) +{ + return INVALID_HARTID; +} + +static inline unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, + unsigned int ctxt_idx) +{ + return INVALID_HARTID; +} + +static inline unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id) +{ + return INVALID_CONTEXT; +} + +static inline unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx) +{ + return INVALID_CONTEXT; +} + +static inline int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res) +{ + return 0; +} + +#endif /* CONFIG_ACPI */ + #endif /* _ASM_RISCV_IRQ_H */ diff --git a/arch/riscv/kernel/acpi.c b/arch/riscv/kernel/acpi.c index 07a43843368dd1a36b2f06dd57c8c3eac6c5906b..c61b71c093bfa29183724f8aed3f42f9b826e4d0 100644 --- a/arch/riscv/kernel/acpi.c +++ b/arch/riscv/kernel/acpi.c @@ -15,7 +15,9 @@ #include #include +#include #include +#include #include int acpi_noirq = 1; /* skip ACPI IRQ initialization */ @@ -130,7 +132,7 @@ void __init acpi_boot_table_init(void) if (param_acpi_off || (!param_acpi_on && !param_acpi_force && efi.acpi20 == EFI_INVALID_TABLE_ADDR)) - return; + goto done; /* * ACPI is disabled at this point. Enable it in order to parse @@ -150,6 +152,14 @@ void __init acpi_boot_table_init(void) if (!param_acpi_force) disable_acpi(); } + +done: + if (acpi_disabled) { + if (earlycon_acpi_spcr_enable) + early_init_dt_scan_chosen_stdout(); + } else { + acpi_parse_spcr(earlycon_acpi_spcr_enable, true); + } } static int acpi_parse_madt_rintc(union acpi_subtable_headers *header, const unsigned long end) @@ -223,29 +233,26 @@ void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) #ifdef CONFIG_PCI /* - * These interfaces are defined just to enable building ACPI core. - * TODO: Update it with actual implementation when external interrupt - * controller support is added in RISC-V ACPI. + * raw_pci_read/write - Platform-specific PCI config space access. */ -int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn, - int reg, int len, u32 *val) +int raw_pci_read(unsigned int domain, unsigned int bus, + unsigned int devfn, int reg, int len, u32 *val) { - return PCIBIOS_DEVICE_NOT_FOUND; -} + struct pci_bus *b = pci_find_bus(domain, bus); -int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn, - int reg, int len, u32 val) -{ - return PCIBIOS_DEVICE_NOT_FOUND; + if (!b) + return PCIBIOS_DEVICE_NOT_FOUND; + return b->ops->read(b, devfn, reg, len, val); } -int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) +int raw_pci_write(unsigned int domain, unsigned int bus, + unsigned int devfn, int reg, int len, u32 val) { - return -1; -} + struct pci_bus *b = pci_find_bus(domain, bus); -struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) -{ - return NULL; + if (!b) + return PCIBIOS_DEVICE_NOT_FOUND; + return b->ops->write(b, devfn, reg, len, val); } + #endif /* CONFIG_PCI */ diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index eaa09bf52f17609ffbb24fef7d7fccf12afe4024..d367e649714f6a1faaa4611c2d7a436deae68c15 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -37,7 +37,7 @@ acpi-$(CONFIG_ACPI_SLEEP) += proc.o # ACPI Bus and Device Drivers # acpi-y += bus.o glue.o -acpi-y += scan.o +acpi-y += scan.o mipi-disco-img.o acpi-y += resource.o acpi-y += acpi_processor.o acpi-y += processor_core.o diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index ce57955662145feed3105a1077101cad35937810..ab0b6657d58b3c5feca2052da9edbae5dea542fa 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -1165,6 +1165,9 @@ static int __init acpi_bus_init_irq(void) message = "SWPIC"; break; #endif + case ACPI_IRQ_MODEL_RINTC: + message = "RINTC"; + break; default: pr_info("Unknown interrupt routing model\n"); return -ENODEV; @@ -1421,6 +1424,7 @@ static int __init acpi_init(void) acpi_hest_init(); acpi_ghes_init(); acpi_arm_init(); + acpi_riscv_init(); acpi_scan_init(); acpi_ec_init(); acpi_debugfs_init(); diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index cbac78cb268a2c5483af35fa21b0c533e529eed2..e903e83b49d367b382be0943a510195a6e1d0962 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -285,4 +285,12 @@ void acpi_init_lpit(void); static inline void acpi_init_lpit(void) { } #endif +/*-------------------------------------------------------------------------- + ACPI _CRS CSI-2 and MIPI DisCo for Imaging + -------------------------------------------------------------------------- */ + +void acpi_mipi_check_crs_csi2(acpi_handle handle); +void acpi_mipi_scan_crs_csi2(void); +void acpi_mipi_crs_csi2_cleanup(void); + #endif /* _ACPI_INTERNAL_H_ */ diff --git a/drivers/acpi/mipi-disco-img.c b/drivers/acpi/mipi-disco-img.c new file mode 100644 index 0000000000000000000000000000000000000000..91281c8cb4f2981355f3a9b99508361c6cbd6c66 --- /dev/null +++ b/drivers/acpi/mipi-disco-img.c @@ -0,0 +1,292 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * MIPI DisCo for Imaging support. + * + * Copyright (C) 2023 Intel Corporation + * + * Support MIPI DisCo for Imaging by parsing ACPI _CRS CSI-2 records defined in + * Section 6.4.3.8.2.4 "Camera Serial Interface (CSI-2) Connection Resource + * Descriptor" of ACPI 6.5. + * + * The implementation looks for the information in the ACPI namespace (CSI-2 + * resource descriptors in _CRS) and constructs software nodes compatible with + * Documentation/firmware-guide/acpi/dsd/graph.rst to represent the CSI-2 + * connection graph. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "internal.h" + +static LIST_HEAD(acpi_mipi_crs_csi2_list); + +static void acpi_mipi_data_tag(acpi_handle handle, void *context) +{ +} + +/* Connection data extracted from one _CRS CSI-2 resource descriptor. */ +struct crs_csi2_connection { + struct list_head entry; + struct acpi_resource_csi2_serialbus csi2_data; + acpi_handle remote_handle; + char remote_name[]; +}; + +/* Data extracted from _CRS CSI-2 resource descriptors for one device. */ +struct crs_csi2 { + struct list_head entry; + acpi_handle handle; + struct acpi_device_software_nodes *swnodes; + struct list_head connections; + u32 port_count; +}; + +struct csi2_resources_walk_data { + acpi_handle handle; + struct list_head connections; +}; + +static acpi_status parse_csi2_resource(struct acpi_resource *res, void *context) +{ + struct csi2_resources_walk_data *crwd = context; + struct acpi_resource_csi2_serialbus *csi2_res; + struct acpi_resource_source *csi2_res_src; + u16 csi2_res_src_length; + struct crs_csi2_connection *conn; + acpi_handle remote_handle; + + if (res->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) + return AE_OK; + + csi2_res = &res->data.csi2_serial_bus; + + if (csi2_res->type != ACPI_RESOURCE_SERIAL_TYPE_CSI2) + return AE_OK; + + csi2_res_src = &csi2_res->resource_source; + if (ACPI_FAILURE(acpi_get_handle(NULL, csi2_res_src->string_ptr, + &remote_handle))) { + acpi_handle_debug(crwd->handle, + "unable to find resource source\n"); + return AE_OK; + } + csi2_res_src_length = csi2_res_src->string_length; + if (!csi2_res_src_length) { + acpi_handle_debug(crwd->handle, + "invalid resource source string length\n"); + return AE_OK; + } + + conn = kmalloc(struct_size(conn, remote_name, csi2_res_src_length + 1), + GFP_KERNEL); + if (!conn) + return AE_OK; + + conn->csi2_data = *csi2_res; + strscpy(conn->remote_name, csi2_res_src->string_ptr, csi2_res_src_length); + conn->csi2_data.resource_source.string_ptr = conn->remote_name; + conn->remote_handle = remote_handle; + + list_add(&conn->entry, &crwd->connections); + + return AE_OK; +} + +static struct crs_csi2 *acpi_mipi_add_crs_csi2(acpi_handle handle, + struct list_head *list) +{ + struct crs_csi2 *csi2; + + csi2 = kzalloc(sizeof(*csi2), GFP_KERNEL); + if (!csi2) + return NULL; + + csi2->handle = handle; + INIT_LIST_HEAD(&csi2->connections); + csi2->port_count = 1; + + if (ACPI_FAILURE(acpi_attach_data(handle, acpi_mipi_data_tag, csi2))) { + kfree(csi2); + return NULL; + } + + list_add(&csi2->entry, list); + + return csi2; +} + +static struct crs_csi2 *acpi_mipi_get_crs_csi2(acpi_handle handle) +{ + struct crs_csi2 *csi2; + + if (ACPI_FAILURE(acpi_get_data_full(handle, acpi_mipi_data_tag, + (void **)&csi2, NULL))) + return NULL; + + return csi2; +} + +static void csi_csr2_release_connections(struct list_head *list) +{ + struct crs_csi2_connection *conn, *conn_tmp; + + list_for_each_entry_safe(conn, conn_tmp, list, entry) { + list_del(&conn->entry); + kfree(conn); + } +} + +static void acpi_mipi_del_crs_csi2(struct crs_csi2 *csi2) +{ + list_del(&csi2->entry); + acpi_detach_data(csi2->handle, acpi_mipi_data_tag); + kfree(csi2->swnodes); + csi_csr2_release_connections(&csi2->connections); + kfree(csi2); +} + +/** + * acpi_mipi_check_crs_csi2 - Look for CSI-2 resources in _CRS + * @handle: Device object handle to evaluate _CRS for. + * + * Find all CSI-2 resource descriptors in the given device's _CRS + * and collect them into a list. + */ +void acpi_mipi_check_crs_csi2(acpi_handle handle) +{ + struct csi2_resources_walk_data crwd = { + .handle = handle, + .connections = LIST_HEAD_INIT(crwd.connections), + }; + struct crs_csi2 *csi2; + + /* + * Avoid allocating _CRS CSI-2 objects for devices without any CSI-2 + * resource descriptions in _CRS to reduce overhead. + */ + acpi_walk_resources(handle, METHOD_NAME__CRS, parse_csi2_resource, &crwd); + if (list_empty(&crwd.connections)) + return; + + /* + * Create a _CRS CSI-2 entry to store the extracted connection + * information and add it to the global list. + */ + csi2 = acpi_mipi_add_crs_csi2(handle, &acpi_mipi_crs_csi2_list); + if (!csi2) { + csi_csr2_release_connections(&crwd.connections); + return; /* Nothing really can be done about this. */ + } + + list_replace(&crwd.connections, &csi2->connections); +} + +#define NO_CSI2_PORT (UINT_MAX - 1) + +static void alloc_crs_csi2_swnodes(struct crs_csi2 *csi2) +{ + size_t port_count = csi2->port_count; + struct acpi_device_software_nodes *swnodes; + size_t alloc_size; + unsigned int i; + + /* + * Allocate memory for ports, node pointers (number of nodes + + * 1 (guardian), nodes (root + number of ports * 2 (because for + * every port there is an endpoint)). + */ + if (check_mul_overflow(sizeof(*swnodes->ports) + + sizeof(*swnodes->nodes) * 2 + + sizeof(*swnodes->nodeptrs) * 2, + port_count, &alloc_size) || + check_add_overflow(sizeof(*swnodes) + + sizeof(*swnodes->nodes) + + sizeof(*swnodes->nodeptrs) * 2, + alloc_size, &alloc_size)) { + acpi_handle_info(csi2->handle, + "too many _CRS CSI-2 resource handles (%zu)", + port_count); + return; + } + + swnodes = kmalloc(alloc_size, GFP_KERNEL); + if (!swnodes) + return; + + swnodes->ports = (struct acpi_device_software_node_port *)(swnodes + 1); + swnodes->nodes = (struct software_node *)(swnodes->ports + port_count); + swnodes->nodeptrs = (const struct software_node **)(swnodes->nodes + 1 + + 2 * port_count); + swnodes->num_ports = port_count; + + for (i = 0; i < 2 * port_count + 1; i++) + swnodes->nodeptrs[i] = &swnodes->nodes[i]; + + swnodes->nodeptrs[i] = NULL; + + for (i = 0; i < port_count; i++) + swnodes->ports[i].port_nr = NO_CSI2_PORT; + + csi2->swnodes = swnodes; +} + +/** + * acpi_mipi_scan_crs_csi2 - Create ACPI _CRS CSI-2 software nodes + * + * Note that this function must be called before any struct acpi_device objects + * are bound to any ACPI drivers or scan handlers, so it cannot assume the + * existence of struct acpi_device objects for every device present in the ACPI + * namespace. + * + * acpi_scan_lock in scan.c must be held when calling this function. + */ +void acpi_mipi_scan_crs_csi2(void) +{ + struct crs_csi2 *csi2; + LIST_HEAD(aux_list); + + /* Count references to each ACPI handle in the CSI-2 connection graph. */ + list_for_each_entry(csi2, &acpi_mipi_crs_csi2_list, entry) { + struct crs_csi2_connection *conn; + + list_for_each_entry(conn, &csi2->connections, entry) { + struct crs_csi2 *remote_csi2; + + csi2->port_count++; + + remote_csi2 = acpi_mipi_get_crs_csi2(conn->remote_handle); + if (remote_csi2) { + remote_csi2->port_count++; + continue; + } + /* + * The remote endpoint has no _CRS CSI-2 list entry yet, + * so create one for it and add it to the list. + */ + acpi_mipi_add_crs_csi2(conn->remote_handle, &aux_list); + } + } + list_splice(&aux_list, &acpi_mipi_crs_csi2_list); + + /* Allocate software nodes for representing the CSI-2 information. */ + list_for_each_entry(csi2, &acpi_mipi_crs_csi2_list, entry) + alloc_crs_csi2_swnodes(csi2); +} + +/** + * acpi_mipi_crs_csi2_cleanup - Free _CRS CSI-2 temporary data + */ +void acpi_mipi_crs_csi2_cleanup(void) +{ + struct crs_csi2 *csi2, *csi2_tmp; + + list_for_each_entry_safe(csi2, csi2_tmp, &acpi_mipi_crs_csi2_list, entry) + acpi_mipi_del_crs_csi2(csi2); +} diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c index aa1038b8aec4ac74bc0eb6239452f4f2c3268581..b727db968f33492ac7da93764776ad61457e7dfc 100644 --- a/drivers/acpi/pci_link.c +++ b/drivers/acpi/pci_link.c @@ -748,6 +748,8 @@ static int acpi_pci_link_add(struct acpi_device *device, if (result) kfree(link); + acpi_dev_clear_dependencies(device); + return result < 0 ? result : 1; } diff --git a/drivers/acpi/riscv/Makefile b/drivers/acpi/riscv/Makefile index 8b3b126e0b940bd1492c759c6f267acd6d0f1dc6..05d593d4bbb03391dd2a1747404477896a9cebce 100644 --- a/drivers/acpi/riscv/Makefile +++ b/drivers/acpi/riscv/Makefile @@ -1,2 +1,2 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-y += rhct.o +obj-y += rhct.o init.o irq.o diff --git a/drivers/acpi/riscv/init.c b/drivers/acpi/riscv/init.c new file mode 100644 index 0000000000000000000000000000000000000000..5ef97905a72759ea2aab3195e56b7ee580eded96 --- /dev/null +++ b/drivers/acpi/riscv/init.c @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2023-2024, Ventana Micro Systems Inc + * Author: Sunil V L + */ + +#include +#include "init.h" + +void __init acpi_riscv_init(void) +{ + riscv_acpi_init_gsi_mapping(); +} diff --git a/drivers/acpi/riscv/init.h b/drivers/acpi/riscv/init.h new file mode 100644 index 0000000000000000000000000000000000000000..0b9a07e4031f0dd7441a5133eb0cb97b22768c7e --- /dev/null +++ b/drivers/acpi/riscv/init.h @@ -0,0 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#include + +void __init riscv_acpi_init_gsi_mapping(void); diff --git a/drivers/acpi/riscv/irq.c b/drivers/acpi/riscv/irq.c new file mode 100644 index 0000000000000000000000000000000000000000..bad093514f073f3dbd7e7dc9ee5264e16d8a6e8b --- /dev/null +++ b/drivers/acpi/riscv/irq.c @@ -0,0 +1,320 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2023-2024, Ventana Micro Systems Inc + * Author: Sunil V L + */ + +#include +#include +#include + +#include "init.h" + +struct riscv_ext_intc_list { + acpi_handle handle; + u32 gsi_base; + u32 nr_irqs; + u32 nr_idcs; + u32 id; + u32 type; + struct list_head list; +}; + +struct acpi_irq_dep_ctx { + int rc; + unsigned int index; + acpi_handle handle; +}; + +LIST_HEAD(ext_intc_list); + +static int irqchip_cmp_func(const void *in0, const void *in1) +{ + struct acpi_probe_entry *elem0 = (struct acpi_probe_entry *)in0; + struct acpi_probe_entry *elem1 = (struct acpi_probe_entry *)in1; + + return (elem0->type > elem1->type) - (elem0->type < elem1->type); +} + +/* + * On RISC-V, RINTC structures in MADT should be probed before any other + * interrupt controller structures and IMSIC before APLIC. The interrupt + * controller subtypes in MADT of ACPI spec for RISC-V are defined in + * the incremental order like RINTC(24)->IMSIC(25)->APLIC(26)->PLIC(27). + * Hence, simply sorting the subtypes in incremental order will + * establish the required order. + */ +void arch_sort_irqchip_probe(struct acpi_probe_entry *ap_head, int nr) +{ + struct acpi_probe_entry *ape = ap_head; + + if (nr == 1 || !ACPI_COMPARE_NAMESEG(ACPI_SIG_MADT, ape->id)) + return; + sort(ape, nr, sizeof(*ape), irqchip_cmp_func, NULL); +} + +static acpi_status riscv_acpi_update_gsi_handle(u32 gsi_base, acpi_handle handle) +{ + struct riscv_ext_intc_list *ext_intc_element; + struct list_head *i, *tmp; + + list_for_each_safe(i, tmp, &ext_intc_list) { + ext_intc_element = list_entry(i, struct riscv_ext_intc_list, list); + if (gsi_base == ext_intc_element->gsi_base) { + ext_intc_element->handle = handle; + return AE_OK; + } + } + + return AE_NOT_FOUND; +} + +int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base, + u32 *id, u32 *nr_irqs, u32 *nr_idcs) +{ + struct riscv_ext_intc_list *ext_intc_element; + struct list_head *i; + + list_for_each(i, &ext_intc_list) { + ext_intc_element = list_entry(i, struct riscv_ext_intc_list, list); + if (ext_intc_element->handle == ACPI_HANDLE_FWNODE(fwnode)) { + *gsi_base = ext_intc_element->gsi_base; + *id = ext_intc_element->id; + *nr_irqs = ext_intc_element->nr_irqs; + if (nr_idcs) + *nr_idcs = ext_intc_element->nr_idcs; + + return 0; + } + } + + return -ENODEV; +} + +struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi) +{ + struct riscv_ext_intc_list *ext_intc_element; + struct acpi_device *adev; + struct list_head *i; + + list_for_each(i, &ext_intc_list) { + ext_intc_element = list_entry(i, struct riscv_ext_intc_list, list); + if (gsi >= ext_intc_element->gsi_base && + gsi < (ext_intc_element->gsi_base + ext_intc_element->nr_irqs)) { + adev = acpi_fetch_acpi_dev(ext_intc_element->handle); + if (!adev) + return NULL; + + return acpi_fwnode_handle(adev); + } + } + + return NULL; +} + +static int __init riscv_acpi_register_ext_intc(u32 gsi_base, u32 nr_irqs, u32 nr_idcs, + u32 id, u32 type) +{ + struct riscv_ext_intc_list *ext_intc_element; + + ext_intc_element = kzalloc(sizeof(*ext_intc_element), GFP_KERNEL); + if (!ext_intc_element) + return -ENOMEM; + + ext_intc_element->gsi_base = gsi_base; + ext_intc_element->nr_irqs = nr_irqs; + ext_intc_element->nr_idcs = nr_idcs; + ext_intc_element->id = id; + list_add_tail(&ext_intc_element->list, &ext_intc_list); + return 0; +} + +static acpi_status __init riscv_acpi_create_gsi_map(acpi_handle handle, u32 level, + void *context, void **return_value) +{ + acpi_status status; + u64 gbase; + + if (!acpi_has_method(handle, "_GSB")) { + acpi_handle_err(handle, "_GSB method not found\n"); + return AE_ERROR; + } + + status = acpi_evaluate_integer(handle, "_GSB", NULL, &gbase); + if (ACPI_FAILURE(status)) { + acpi_handle_err(handle, "failed to evaluate _GSB method\n"); + return status; + } + + status = riscv_acpi_update_gsi_handle((u32)gbase, handle); + if (ACPI_FAILURE(status)) { + acpi_handle_err(handle, "failed to find the GSI mapping entry\n"); + return status; + } + + return AE_OK; +} + +static int __init riscv_acpi_aplic_parse_madt(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_aplic *aplic = (struct acpi_madt_aplic *)header; + + return riscv_acpi_register_ext_intc(aplic->gsi_base, aplic->num_sources, aplic->num_idcs, + aplic->id, ACPI_RISCV_IRQCHIP_APLIC); +} + +static int __init riscv_acpi_plic_parse_madt(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_plic *plic = (struct acpi_madt_plic *)header; + + return riscv_acpi_register_ext_intc(plic->gsi_base, plic->num_irqs, 0, + plic->id, ACPI_RISCV_IRQCHIP_PLIC); +} + +void __init riscv_acpi_init_gsi_mapping(void) +{ + /* There can be either PLIC or APLIC */ + if (acpi_table_parse_madt(ACPI_MADT_TYPE_PLIC, riscv_acpi_plic_parse_madt, 0) > 0) { + acpi_get_devices("RSCV0001", riscv_acpi_create_gsi_map, NULL, NULL); + return; + } + + if (acpi_table_parse_madt(ACPI_MADT_TYPE_APLIC, riscv_acpi_aplic_parse_madt, 0) > 0) + acpi_get_devices("RSCV0002", riscv_acpi_create_gsi_map, NULL, NULL); +} + +static acpi_handle riscv_acpi_get_gsi_handle(u32 gsi) +{ + struct riscv_ext_intc_list *ext_intc_element; + struct list_head *i; + + list_for_each(i, &ext_intc_list) { + ext_intc_element = list_entry(i, struct riscv_ext_intc_list, list); + if (gsi >= ext_intc_element->gsi_base && + gsi < (ext_intc_element->gsi_base + ext_intc_element->nr_irqs)) + return ext_intc_element->handle; + } + + return NULL; +} + +static acpi_status riscv_acpi_irq_get_parent(struct acpi_resource *ares, void *context) +{ + struct acpi_irq_dep_ctx *ctx = context; + struct acpi_resource_irq *irq; + struct acpi_resource_extended_irq *eirq; + + switch (ares->type) { + case ACPI_RESOURCE_TYPE_IRQ: + irq = &ares->data.irq; + if (ctx->index >= irq->interrupt_count) { + ctx->index -= irq->interrupt_count; + return AE_OK; + } + ctx->handle = riscv_acpi_get_gsi_handle(irq->interrupts[ctx->index]); + return AE_CTRL_TERMINATE; + case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: + eirq = &ares->data.extended_irq; + if (eirq->producer_consumer == ACPI_PRODUCER) + return AE_OK; + + if (ctx->index >= eirq->interrupt_count) { + ctx->index -= eirq->interrupt_count; + return AE_OK; + } + + /* Support GSIs only */ + if (eirq->resource_source.string_length) + return AE_OK; + + ctx->handle = riscv_acpi_get_gsi_handle(eirq->interrupts[ctx->index]); + return AE_CTRL_TERMINATE; + } + + return AE_OK; +} + +static int riscv_acpi_irq_get_dep(acpi_handle handle, unsigned int index, acpi_handle *gsi_handle) +{ + struct acpi_irq_dep_ctx ctx = {-EINVAL, index, NULL}; + + if (!gsi_handle) + return 0; + + acpi_walk_resources(handle, METHOD_NAME__CRS, riscv_acpi_irq_get_parent, &ctx); + *gsi_handle = ctx.handle; + if (*gsi_handle) + return 1; + + return 0; +} + +static u32 riscv_acpi_add_prt_dep(acpi_handle handle) +{ + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_pci_routing_table *entry; + struct acpi_handle_list dep_devices; + acpi_handle gsi_handle; + acpi_handle link_handle; + acpi_status status; + u32 count = 0; + + status = acpi_get_irq_routing_table(handle, &buffer); + if (ACPI_FAILURE(status)) { + acpi_handle_err(handle, "failed to get IRQ routing table\n"); + kfree(buffer.pointer); + return 0; + } + + entry = buffer.pointer; + while (entry && (entry->length > 0)) { + if (entry->source[0]) { + acpi_get_handle(handle, entry->source, &link_handle); + dep_devices.count = 1; + + dep_devices.handles[0] = link_handle; + count += acpi_scan_add_dep(handle, &dep_devices); + } else { + gsi_handle = riscv_acpi_get_gsi_handle(entry->source_index); + dep_devices.count = 1; + + dep_devices.handles[0] = gsi_handle; + count += acpi_scan_add_dep(handle, &dep_devices); + } + + entry = (struct acpi_pci_routing_table *) + ((unsigned long)entry + entry->length); + } + + kfree(buffer.pointer); + return count; +} + +static u32 riscv_acpi_add_irq_dep(acpi_handle handle) +{ + struct acpi_handle_list dep_devices; + acpi_handle gsi_handle; + u32 count = 0; + int i; + + for (i = 0; + riscv_acpi_irq_get_dep(handle, i, &gsi_handle); + i++) { + dep_devices.count = 1; + + dep_devices.handles[0] = gsi_handle; + count += acpi_scan_add_dep(handle, &dep_devices); + } + + return count; +} + +u32 arch_acpi_add_auto_dep(acpi_handle handle) +{ + if (acpi_has_method(handle, "_PRT")) + return riscv_acpi_add_prt_dep(handle); + + return riscv_acpi_add_irq_dep(handle); +} diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index c0c5c5c58ae1e7ec093dfbf22c4b3f8bc04ed5af..fd19b58c75da8e5be049ee5345ffbaf838854168 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -794,6 +794,9 @@ static const char * const acpi_honor_dep_ids[] = { "INTC1059", /* IVSC (TGL) driver must be loaded to allow i2c access to camera sensors */ "INTC1095", /* IVSC (ADL) driver must be loaded to allow i2c access to camera sensors */ "INTC100A", /* IVSC (RPL) driver must be loaded to allow i2c access to camera sensors */ + "RSCV0001", /* RISC-V PLIC */ + "RSCV0002", /* RISC-V APLIC */ + "PNP0C0F", /* PCI Link Device */ NULL }; @@ -1959,6 +1962,48 @@ void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) mutex_unlock(&acpi_scan_lock); } +int acpi_scan_add_dep(acpi_handle handle, struct acpi_handle_list *dep_devices) +{ + u32 count; + int i; + + for (count = 0, i = 0; i < dep_devices->count; i++) { + struct acpi_device_info *info; + struct acpi_dep_data *dep; + bool skip, honor_dep; + acpi_status status; + + status = acpi_get_object_info(dep_devices->handles[i], &info); + if (ACPI_FAILURE(status)) { + acpi_handle_debug(handle, "Error reading _DEP device info\n"); + continue; + } + + skip = acpi_info_matches_ids(info, acpi_ignore_dep_ids); + honor_dep = acpi_info_matches_ids(info, acpi_honor_dep_ids); + kfree(info); + + if (skip) + continue; + + dep = kzalloc(sizeof(*dep), GFP_KERNEL); + if (!dep) + continue; + + count++; + + dep->supplier = dep_devices->handles[i]; + dep->consumer = handle; + dep->honor_dep = honor_dep; + + mutex_lock(&acpi_dep_list_lock); + list_add_tail(&dep->node, &acpi_dep_list); + mutex_unlock(&acpi_dep_list_lock); + } + + return count; +} + static void acpi_scan_init_hotplug(struct acpi_device *adev) { struct acpi_hardware_id *hwid; @@ -1978,12 +2023,22 @@ static void acpi_scan_init_hotplug(struct acpi_device *adev) } } -static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) +u32 __weak arch_acpi_add_auto_dep(acpi_handle handle) { return 0; } + +static u32 acpi_scan_check_dep(acpi_handle handle) { struct acpi_handle_list dep_devices; acpi_status status; - u32 count; - int i; + u32 count = 0; + + /* + * Some architectures like RISC-V need to add dependencies for + * all devices which use GSI to the interrupt controller so that + * interrupt controller is probed before any of those devices. + * Instead of mandating _DEP on all the devices, detect the + * dependency and add automatically. + */ + count += arch_acpi_add_auto_dep(handle); /* * Check for _HID here to avoid deferring the enumeration of: @@ -1991,53 +2046,26 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) * 2. ACPI nodes describing USB ports. * Still, checking for _HID catches more then just these cases ... */ - if (!check_dep || !acpi_has_method(handle, "_DEP") || - !acpi_has_method(handle, "_HID")) - return 0; + if (!acpi_has_method(handle, "_DEP") || !acpi_has_method(handle, "_HID")) + return count; status = acpi_evaluate_reference(handle, "_DEP", NULL, &dep_devices); if (ACPI_FAILURE(status)) { acpi_handle_debug(handle, "Failed to evaluate _DEP.\n"); - return 0; - } - - for (count = 0, i = 0; i < dep_devices.count; i++) { - struct acpi_device_info *info; - struct acpi_dep_data *dep; - bool skip, honor_dep; - - status = acpi_get_object_info(dep_devices.handles[i], &info); - if (ACPI_FAILURE(status)) { - acpi_handle_debug(handle, "Error reading _DEP device info\n"); - continue; - } - - skip = acpi_info_matches_ids(info, acpi_ignore_dep_ids); - honor_dep = acpi_info_matches_ids(info, acpi_honor_dep_ids); - kfree(info); - - if (skip) - continue; - - dep = kzalloc(sizeof(*dep), GFP_KERNEL); - if (!dep) - continue; - - count++; - - dep->supplier = dep_devices.handles[i]; - dep->consumer = handle; - dep->honor_dep = honor_dep; - - mutex_lock(&acpi_dep_list_lock); - list_add_tail(&dep->node , &acpi_dep_list); - mutex_unlock(&acpi_dep_list_lock); + return count; } + count += acpi_scan_add_dep(handle, &dep_devices); return count; } -static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, +static acpi_status acpi_scan_check_crs_csi2_cb(acpi_handle handle, u32 a, void *b, void **c) +{ + acpi_mipi_check_crs_csi2(handle); + return AE_OK; +} + +static acpi_status acpi_bus_check_add(acpi_handle handle, bool first_pass, struct acpi_device **adev_p) { struct acpi_device *device = acpi_fetch_acpi_dev(handle); @@ -2055,9 +2083,25 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, if (acpi_device_should_be_hidden(handle)) return AE_OK; - /* Bail out if there are dependencies. */ - if (acpi_scan_check_dep(handle, check_dep) > 0) - return AE_CTRL_DEPTH; + if (first_pass) { + acpi_mipi_check_crs_csi2(handle); + + /* Bail out if there are dependencies. */ + if (acpi_scan_check_dep(handle) > 0) { + /* + * The entire CSI-2 connection graph needs to be + * extracted before any drivers or scan handlers + * are bound to struct device objects, so scan + * _CRS CSI-2 resource descriptors for all + * devices below the current handle. + */ + acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, + ACPI_UINT32_MAX, + acpi_scan_check_crs_csi2_cb, + NULL, NULL, NULL); + return AE_CTRL_DEPTH; + } + } fallthrough; case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ @@ -2080,10 +2124,10 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, } /* - * If check_dep is true at this point, the device has no dependencies, + * If first_pass is true at this point, the device has no dependencies, * or the creation of the device object would have been postponed above. */ - acpi_add_single_object(&device, handle, type, !check_dep); + acpi_add_single_object(&device, handle, type, !first_pass); if (!device) return AE_CTRL_DEPTH; @@ -2497,12 +2541,21 @@ int acpi_bus_scan(acpi_handle handle) if (!device) return -ENODEV; + /* + * Allocate ACPI _CRS CSI-2 software nodes using information extracted + * from the _CRS CSI-2 resource descriptors during the ACPI namespace + * walk above. + */ + acpi_mipi_scan_crs_csi2(); + acpi_bus_attach(device, (void *)true); /* Pass 2: Enumerate all of the remaining devices. */ acpi_scan_postponed(); + acpi_mipi_crs_csi2_cleanup(); + return 0; } EXPORT_SYMBOL(acpi_bus_scan); @@ -2689,6 +2742,8 @@ static int __init acpi_match_madt(union acpi_subtable_headers *header, return 0; } +void __weak arch_sort_irqchip_probe(struct acpi_probe_entry *ap_head, int nr) { } + int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr) { int count = 0; @@ -2697,6 +2752,7 @@ int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr) return 0; mutex_lock(&acpi_probe_mutex); + arch_sort_irqchip_probe(ap_head, nr); for (ape = ap_head; nr; ape++, nr--) { if (ACPI_COMPARE_NAMESEG(ACPI_SIG_MADT, ape->id)) { acpi_probe_count = 0; diff --git a/drivers/irqchip/irq-riscv-aplic-direct.c b/drivers/irqchip/irq-riscv-aplic-direct.c index 4a3ffe856d6c30e18dc41a9d5e91314eca8a0207..7cd6b646774b9a167a86db5f5d6176f5df02d901 100644 --- a/drivers/irqchip/irq-riscv-aplic-direct.c +++ b/drivers/irqchip/irq-riscv-aplic-direct.c @@ -4,6 +4,7 @@ * Copyright (C) 2022 Ventana Micro Systems Inc. */ +#include #include #include #include @@ -189,17 +190,22 @@ static int aplic_direct_starting_cpu(unsigned int cpu) } static int aplic_direct_parse_parent_hwirq(struct device *dev, u32 index, - u32 *parent_hwirq, unsigned long *parent_hartid) + u32 *parent_hwirq, unsigned long *parent_hartid, + struct aplic_priv *priv) { struct of_phandle_args parent; + unsigned long hartid; int rc; - /* - * Currently, only OF fwnode is supported so extend this - * function for ACPI support. - */ - if (!is_of_node(dev->fwnode)) - return -EINVAL; + if (!is_of_node(dev->fwnode)) { + hartid = acpi_rintc_ext_parent_to_hartid(priv->acpi_aplic_id, index); + if (hartid == INVALID_HARTID) + return -ENODEV; + + *parent_hartid = hartid; + *parent_hwirq = RV_IRQ_EXT; + return 0; + } rc = of_irq_parse_one(to_of_node(dev->fwnode), index, &parent); if (rc) @@ -237,7 +243,7 @@ int aplic_direct_setup(struct device *dev, void __iomem *regs) /* Setup per-CPU IDC and target CPU mask */ current_cpu = get_cpu(); for (i = 0; i < priv->nr_idcs; i++) { - rc = aplic_direct_parse_parent_hwirq(dev, i, &hwirq, &hartid); + rc = aplic_direct_parse_parent_hwirq(dev, i, &hwirq, &hartid, priv); if (rc) { dev_warn(dev, "parent irq for IDC%d not found\n", i); continue; diff --git a/drivers/irqchip/irq-riscv-aplic-main.c b/drivers/irqchip/irq-riscv-aplic-main.c index 4ed7a1db7776fd52247150a49f680bf05ab8d9e0..58046a46de92738a43de3c1a10279b2a2f4375a6 100644 --- a/drivers/irqchip/irq-riscv-aplic-main.c +++ b/drivers/irqchip/irq-riscv-aplic-main.c @@ -4,8 +4,10 @@ * Copyright (C) 2022 Ventana Micro Systems Inc. */ +#include #include #include +#include #include #include #include @@ -125,39 +127,50 @@ static void aplic_init_hw_irqs(struct aplic_priv *priv) writel(0, priv->regs + APLIC_DOMAINCFG); } +#ifdef CONFIG_ACPI +static const struct acpi_device_id aplic_acpi_match[] = { + { "RSCV0002", 0 }, + {} +}; +MODULE_DEVICE_TABLE(acpi, aplic_acpi_match); + +#endif + int aplic_setup_priv(struct aplic_priv *priv, struct device *dev, void __iomem *regs) { struct device_node *np = to_of_node(dev->fwnode); struct of_phandle_args parent; int rc; - /* - * Currently, only OF fwnode is supported so extend this - * function for ACPI support. - */ - if (!np) - return -EINVAL; - /* Save device pointer and register base */ priv->dev = dev; priv->regs = regs; - /* Find out number of interrupt sources */ - rc = of_property_read_u32(np, "riscv,num-sources", &priv->nr_irqs); - if (rc) { - dev_err(dev, "failed to get number of interrupt sources\n"); - return rc; - } - - /* - * Find out number of IDCs based on parent interrupts - * - * If "msi-parent" property is present then we ignore the - * APLIC IDCs which forces the APLIC driver to use MSI mode. - */ - if (!of_property_present(np, "msi-parent")) { - while (!of_irq_parse_one(np, priv->nr_idcs, &parent)) - priv->nr_idcs++; + if (np) { + /* Find out number of interrupt sources */ + rc = of_property_read_u32(np, "riscv,num-sources", &priv->nr_irqs); + if (rc) { + dev_err(dev, "failed to get number of interrupt sources\n"); + return rc; + } + + /* + * Find out number of IDCs based on parent interrupts + * + * If "msi-parent" property is present then we ignore the + * APLIC IDCs which forces the APLIC driver to use MSI mode. + */ + if (!of_property_present(np, "msi-parent")) { + while (!of_irq_parse_one(np, priv->nr_idcs, &parent)) + priv->nr_idcs++; + } + } else { + rc = riscv_acpi_get_gsi_info(dev->fwnode, &priv->gsi_base, &priv->acpi_aplic_id, + &priv->nr_irqs, &priv->nr_idcs); + if (rc) { + dev_err(dev, "failed to find GSI mapping\n"); + return rc; + } } /* Setup initial state APLIC interrupts */ @@ -184,7 +197,11 @@ static int aplic_probe(struct platform_device *pdev) * If msi-parent property is present then setup APLIC MSI * mode otherwise setup APLIC direct mode. */ - msi_mode = of_property_present(to_of_node(dev->fwnode), "msi-parent"); + if (is_of_node(dev->fwnode)) + msi_mode = of_property_present(to_of_node(dev->fwnode), "msi-parent"); + else + msi_mode = imsic_acpi_get_fwnode(NULL) ? 1 : 0; + if (msi_mode) rc = aplic_msi_setup(dev, regs); else @@ -193,6 +210,10 @@ static int aplic_probe(struct platform_device *pdev) dev_err_probe(dev, rc, "failed to setup APLIC in %s mode\n", msi_mode ? "MSI" : "direct"); +#ifdef CONFIG_ACPI + if (!acpi_disabled) + acpi_dev_clear_dependencies(ACPI_COMPANION(dev)); +#endif return rc; } @@ -205,6 +226,7 @@ static struct platform_driver aplic_driver = { .driver = { .name = "riscv-aplic", .of_match_table = aplic_match, + .acpi_match_table = ACPI_PTR(aplic_acpi_match), }, .probe = aplic_probe, }; diff --git a/drivers/irqchip/irq-riscv-aplic-main.h b/drivers/irqchip/irq-riscv-aplic-main.h index 4393927d8c80704579cd03c67f9ce31d6bfb892e..b0ad8cde69b1314c6db5ef3cc7070c843c381790 100644 --- a/drivers/irqchip/irq-riscv-aplic-main.h +++ b/drivers/irqchip/irq-riscv-aplic-main.h @@ -28,6 +28,7 @@ struct aplic_priv { u32 gsi_base; u32 nr_irqs; u32 nr_idcs; + u32 acpi_aplic_id; void __iomem *regs; struct aplic_msicfg msicfg; }; diff --git a/drivers/irqchip/irq-riscv-aplic-msi.c b/drivers/irqchip/irq-riscv-aplic-msi.c index 5067bdb8639ee5a7128698321a9088a4fb802888..fb8d1838609fb5177784e1bf440c4ccf0b96006f 100644 --- a/drivers/irqchip/irq-riscv-aplic-msi.c +++ b/drivers/irqchip/irq-riscv-aplic-msi.c @@ -175,6 +175,7 @@ static const struct msi_domain_template aplic_msi_template = { int aplic_msi_setup(struct device *dev, void __iomem *regs) { const struct imsic_global_config *imsic_global; + struct irq_domain *msi_domain; struct aplic_priv *priv; struct aplic_msicfg *mc; phys_addr_t pa; @@ -257,8 +258,14 @@ int aplic_msi_setup(struct device *dev, void __iomem *regs) * IMSIC and the IMSIC MSI domains are created later through * the platform driver probing so we set it explicitly here. */ - if (is_of_node(dev->fwnode)) + if (is_of_node(dev->fwnode)) { of_msi_configure(dev, to_of_node(dev->fwnode)); + } else { + msi_domain = irq_find_matching_fwnode(imsic_acpi_get_fwnode(dev), + DOMAIN_BUS_PLATFORM_MSI); + if (msi_domain) + dev_set_msi_domain(dev, msi_domain); + } if (!dev_get_msi_domain(dev)) return -EPROBE_DEFER; diff --git a/drivers/irqchip/irq-riscv-imsic-early.c b/drivers/irqchip/irq-riscv-imsic-early.c index 886418ec06cb9b8c54511bcfbd633a2de1475254..d586c579713dd44c0270c24f70ca4b61faae38fe 100644 --- a/drivers/irqchip/irq-riscv-imsic-early.c +++ b/drivers/irqchip/irq-riscv-imsic-early.c @@ -5,13 +5,16 @@ */ #define pr_fmt(fmt) "riscv-imsic: " fmt +#include #include #include #include #include #include #include +#include #include +#include #include #include @@ -182,7 +185,7 @@ static int __init imsic_early_dt_init(struct device_node *node, struct device_no int rc; /* Setup IMSIC state */ - rc = imsic_setup_state(fwnode); + rc = imsic_setup_state(fwnode, NULL); if (rc) { pr_err("%pfwP: failed to setup state (error %d)\n", fwnode, rc); return rc; @@ -199,3 +202,62 @@ static int __init imsic_early_dt_init(struct device_node *node, struct device_no } IRQCHIP_DECLARE(riscv_imsic, "riscv,imsics", imsic_early_dt_init); + +#ifdef CONFIG_ACPI + +static struct fwnode_handle *imsic_acpi_fwnode; + +struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev) +{ + return imsic_acpi_fwnode; +} + +static int __init imsic_early_acpi_init(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_imsic *imsic = (struct acpi_madt_imsic *)header; + int rc; + + imsic_acpi_fwnode = irq_domain_alloc_named_fwnode("imsic"); + if (!imsic_acpi_fwnode) { + pr_err("unable to allocate IMSIC FW node\n"); + return -ENOMEM; + } + + /* Setup IMSIC state */ + rc = imsic_setup_state(imsic_acpi_fwnode, imsic); + if (rc) { + pr_err("%pfwP: failed to setup state (error %d)\n", imsic_acpi_fwnode, rc); + return rc; + } + + /* Do early setup of IMSIC state and IPIs */ + rc = imsic_early_probe(imsic_acpi_fwnode); + if (rc) { + irq_domain_free_fwnode(imsic_acpi_fwnode); + imsic_acpi_fwnode = NULL; + return rc; + } + + rc = imsic_platform_acpi_probe(imsic_acpi_fwnode); + +#ifdef CONFIG_PCI + if (!rc) + pci_msi_register_fwnode_provider(&imsic_acpi_get_fwnode); +#endif + + if (rc) + pr_err("%pfwP: failed to register IMSIC for MSI functionality (error %d)\n", + imsic_acpi_fwnode, rc); + + /* + * Even if imsic_platform_acpi_probe() fails, the IPI part of IMSIC can + * continue to work. So, no need to return failure. This is similar to + * DT where IPI works but MSI probe fails for some reason. + */ + return 0; +} + +IRQCHIP_ACPI_DECLARE(riscv_imsic, ACPI_MADT_TYPE_IMSIC, NULL, + 1, imsic_early_acpi_init); +#endif diff --git a/drivers/irqchip/irq-riscv-imsic-platform.c b/drivers/irqchip/irq-riscv-imsic-platform.c index c5ec66e0bfd33994d832120925d8fc7afec4c90f..c708780e8760f3445c89530ab8cb134adc874d2d 100644 --- a/drivers/irqchip/irq-riscv-imsic-platform.c +++ b/drivers/irqchip/irq-riscv-imsic-platform.c @@ -5,6 +5,7 @@ */ #define pr_fmt(fmt) "riscv-imsic: " fmt +#include #include #include #include @@ -348,18 +349,37 @@ int imsic_irqdomain_init(void) return 0; } -static int imsic_platform_probe(struct platform_device *pdev) +static int imsic_platform_probe_common(struct fwnode_handle *fwnode) { - struct device *dev = &pdev->dev; - - if (imsic && imsic->fwnode != dev->fwnode) { - dev_err(dev, "fwnode mismatch\n"); + if (imsic && imsic->fwnode != fwnode) { + pr_err("%pfwP: fwnode mismatch\n", fwnode); return -ENODEV; } return imsic_irqdomain_init(); } +static int imsic_platform_dt_probe(struct platform_device *pdev) +{ + return imsic_platform_probe_common(pdev->dev.fwnode); +} + +#ifdef CONFIG_ACPI + +/* + * On ACPI based systems, PCI enumeration happens early during boot in + * acpi_scan_init(). PCI enumeration expects MSI domain setup before + * it calls pci_set_msi_domain(). Hence, unlike in DT where + * imsic-platform drive probe happens late during boot, ACPI based + * systems need to setup the MSI domain early. + */ +int imsic_platform_acpi_probe(struct fwnode_handle *fwnode) +{ + return imsic_platform_probe_common(fwnode); +} + +#endif + static const struct of_device_id imsic_platform_match[] = { { .compatible = "riscv,imsics" }, {} @@ -370,6 +390,6 @@ static struct platform_driver imsic_platform_driver = { .name = "riscv-imsic", .of_match_table = imsic_platform_match, }, - .probe = imsic_platform_probe, + .probe = imsic_platform_dt_probe, }; builtin_platform_driver(imsic_platform_driver); diff --git a/drivers/irqchip/irq-riscv-imsic-state.c b/drivers/irqchip/irq-riscv-imsic-state.c index 5479f872e62b42661d08df0d5d1fc6bf75d283b1..b97e6cd89ed7422e56bc2ef96e46d09f37dcc55f 100644 --- a/drivers/irqchip/irq-riscv-imsic-state.c +++ b/drivers/irqchip/irq-riscv-imsic-state.c @@ -5,6 +5,7 @@ */ #define pr_fmt(fmt) "riscv-imsic: " fmt +#include #include #include #include @@ -510,18 +511,90 @@ static int __init imsic_matrix_init(void) return 0; } +static int __init imsic_populate_global_dt(struct fwnode_handle *fwnode, + struct imsic_global_config *global, + u32 *nr_parent_irqs) +{ + int rc; + + /* Find number of guest index bits in MSI address */ + rc = of_property_read_u32(to_of_node(fwnode), "riscv,guest-index-bits", + &global->guest_index_bits); + if (rc) + global->guest_index_bits = 0; + + /* Find number of HART index bits */ + rc = of_property_read_u32(to_of_node(fwnode), "riscv,hart-index-bits", + &global->hart_index_bits); + if (rc) { + /* Assume default value */ + global->hart_index_bits = __fls(*nr_parent_irqs); + if (BIT(global->hart_index_bits) < *nr_parent_irqs) + global->hart_index_bits++; + } + + /* Find number of group index bits */ + rc = of_property_read_u32(to_of_node(fwnode), "riscv,group-index-bits", + &global->group_index_bits); + if (rc) + global->group_index_bits = 0; + + /* + * Find first bit position of group index. + * If not specified assumed the default APLIC-IMSIC configuration. + */ + rc = of_property_read_u32(to_of_node(fwnode), "riscv,group-index-shift", + &global->group_index_shift); + if (rc) + global->group_index_shift = IMSIC_MMIO_PAGE_SHIFT * 2; + + /* Find number of interrupt identities */ + rc = of_property_read_u32(to_of_node(fwnode), "riscv,num-ids", + &global->nr_ids); + if (rc) { + pr_err("%pfwP: number of interrupt identities not found\n", fwnode); + return rc; + } + + /* Find number of guest interrupt identities */ + rc = of_property_read_u32(to_of_node(fwnode), "riscv,num-guest-ids", + &global->nr_guest_ids); + if (rc) + global->nr_guest_ids = global->nr_ids; + + return 0; +} + +static int __init imsic_populate_global_acpi(struct fwnode_handle *fwnode, + struct imsic_global_config *global, + u32 *nr_parent_irqs, void *opaque) +{ + struct acpi_madt_imsic *imsic = (struct acpi_madt_imsic *)opaque; + + global->guest_index_bits = imsic->guest_index_bits; + global->hart_index_bits = imsic->hart_index_bits; + global->group_index_bits = imsic->group_index_bits; + global->group_index_shift = imsic->group_index_shift; + global->nr_ids = imsic->num_ids; + global->nr_guest_ids = imsic->num_guest_ids; + return 0; +} + static int __init imsic_get_parent_hartid(struct fwnode_handle *fwnode, u32 index, unsigned long *hartid) { struct of_phandle_args parent; int rc; - /* - * Currently, only OF fwnode is supported so extend this - * function for ACPI support. - */ - if (!is_of_node(fwnode)) - return -EINVAL; + if (!is_of_node(fwnode)) { + if (hartid) + *hartid = acpi_rintc_index_to_hartid(index); + + if (!hartid || (*hartid == INVALID_HARTID)) + return -EINVAL; + + return 0; + } rc = of_irq_parse_one(to_of_node(fwnode), index, &parent); if (rc) @@ -540,12 +613,8 @@ static int __init imsic_get_parent_hartid(struct fwnode_handle *fwnode, static int __init imsic_get_mmio_resource(struct fwnode_handle *fwnode, u32 index, struct resource *res) { - /* - * Currently, only OF fwnode is supported so extend this - * function for ACPI support. - */ if (!is_of_node(fwnode)) - return -EINVAL; + return acpi_rintc_get_imsic_mmio_info(index, res); return of_address_to_resource(to_of_node(fwnode), index, res); } @@ -553,20 +622,14 @@ static int __init imsic_get_mmio_resource(struct fwnode_handle *fwnode, static int __init imsic_parse_fwnode(struct fwnode_handle *fwnode, struct imsic_global_config *global, u32 *nr_parent_irqs, - u32 *nr_mmios) + u32 *nr_mmios, + void *opaque) { unsigned long hartid; struct resource res; int rc; u32 i; - /* - * Currently, only OF fwnode is supported so extend this - * function for ACPI support. - */ - if (!is_of_node(fwnode)) - return -EINVAL; - *nr_parent_irqs = 0; *nr_mmios = 0; @@ -578,50 +641,13 @@ static int __init imsic_parse_fwnode(struct fwnode_handle *fwnode, return -EINVAL; } - /* Find number of guest index bits in MSI address */ - rc = of_property_read_u32(to_of_node(fwnode), "riscv,guest-index-bits", - &global->guest_index_bits); - if (rc) - global->guest_index_bits = 0; - - /* Find number of HART index bits */ - rc = of_property_read_u32(to_of_node(fwnode), "riscv,hart-index-bits", - &global->hart_index_bits); - if (rc) { - /* Assume default value */ - global->hart_index_bits = __fls(*nr_parent_irqs); - if (BIT(global->hart_index_bits) < *nr_parent_irqs) - global->hart_index_bits++; - } - - /* Find number of group index bits */ - rc = of_property_read_u32(to_of_node(fwnode), "riscv,group-index-bits", - &global->group_index_bits); - if (rc) - global->group_index_bits = 0; + if (is_of_node(fwnode)) + rc = imsic_populate_global_dt(fwnode, global, nr_parent_irqs); + else + rc = imsic_populate_global_acpi(fwnode, global, nr_parent_irqs, opaque); - /* - * Find first bit position of group index. - * If not specified assumed the default APLIC-IMSIC configuration. - */ - rc = of_property_read_u32(to_of_node(fwnode), "riscv,group-index-shift", - &global->group_index_shift); if (rc) - global->group_index_shift = IMSIC_MMIO_PAGE_SHIFT * 2; - - /* Find number of interrupt identities */ - rc = of_property_read_u32(to_of_node(fwnode), "riscv,num-ids", - &global->nr_ids); - if (rc) { - pr_err("%pfwP: number of interrupt identities not found\n", fwnode); return rc; - } - - /* Find number of guest interrupt identities */ - rc = of_property_read_u32(to_of_node(fwnode), "riscv,num-guest-ids", - &global->nr_guest_ids); - if (rc) - global->nr_guest_ids = global->nr_ids; /* Sanity check guest index bits */ i = BITS_PER_LONG - IMSIC_MMIO_PAGE_SHIFT; @@ -688,7 +714,7 @@ static int __init imsic_parse_fwnode(struct fwnode_handle *fwnode, return 0; } -int __init imsic_setup_state(struct fwnode_handle *fwnode) +int __init imsic_setup_state(struct fwnode_handle *fwnode, void *opaque) { u32 i, j, index, nr_parent_irqs, nr_mmios, nr_handlers = 0; struct imsic_global_config *global; @@ -729,7 +755,7 @@ int __init imsic_setup_state(struct fwnode_handle *fwnode) } /* Parse IMSIC fwnode */ - rc = imsic_parse_fwnode(fwnode, global, &nr_parent_irqs, &nr_mmios); + rc = imsic_parse_fwnode(fwnode, global, &nr_parent_irqs, &nr_mmios, opaque); if (rc) goto out_free_local; diff --git a/drivers/irqchip/irq-riscv-imsic-state.h b/drivers/irqchip/irq-riscv-imsic-state.h index 5ae2f69b035b6ea9d503cda87bab2c43e09b03f0..391e44280827570f572d9f16ef03f90e49e36951 100644 --- a/drivers/irqchip/irq-riscv-imsic-state.h +++ b/drivers/irqchip/irq-riscv-imsic-state.h @@ -102,7 +102,7 @@ void imsic_vector_debug_show_summary(struct seq_file *m, int ind); void imsic_state_online(void); void imsic_state_offline(void); -int imsic_setup_state(struct fwnode_handle *fwnode); +int imsic_setup_state(struct fwnode_handle *fwnode, void *opaque); int imsic_irqdomain_init(void); #endif diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c index 47f3200476da5ee3c90f1f7c5c9b0cdac676ee7b..f653c13de62b57acdae822fdbed41c881a72ceaa 100644 --- a/drivers/irqchip/irq-riscv-intc.c +++ b/drivers/irqchip/irq-riscv-intc.c @@ -250,14 +250,119 @@ IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init); #ifdef CONFIG_ACPI +struct rintc_data { + union { + u32 ext_intc_id; + struct { + u32 context_id : 16, + reserved : 8, + aplic_plic_id : 8; + }; + }; + unsigned long hart_id; + u64 imsic_addr; + u32 imsic_size; +}; + +static u32 nr_rintc; +static struct rintc_data **rintc_acpi_data; + +#define for_each_matching_plic(_plic_id) \ + unsigned int _plic; \ + \ + for (_plic = 0; _plic < nr_rintc; _plic++) \ + if (rintc_acpi_data[_plic]->aplic_plic_id != _plic_id) \ + continue; \ + else + +unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id) +{ + unsigned int nctx = 0; + + for_each_matching_plic(plic_id) + nctx++; + + return nctx; +} + +static struct rintc_data *get_plic_context(unsigned int plic_id, unsigned int ctxt_idx) +{ + unsigned int ctxt = 0; + + for_each_matching_plic(plic_id) { + if (ctxt == ctxt_idx) + return rintc_acpi_data[_plic]; + + ctxt++; + } + + return NULL; +} + +unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int ctxt_idx) +{ + struct rintc_data *data = get_plic_context(plic_id, ctxt_idx); + + return data ? data->hart_id : INVALID_HARTID; +} + +unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx) +{ + struct rintc_data *data = get_plic_context(plic_id, ctxt_idx); + + return data ? data->context_id : INVALID_CONTEXT; +} + +unsigned long acpi_rintc_index_to_hartid(u32 index) +{ + return index >= nr_rintc ? INVALID_HARTID : rintc_acpi_data[index]->hart_id; +} + +int acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res) +{ + if (index >= nr_rintc) + return -1; + + res->start = rintc_acpi_data[index]->imsic_addr; + res->end = res->start + rintc_acpi_data[index]->imsic_size - 1; + res->flags = IORESOURCE_MEM; + return 0; +} + +static int __init riscv_intc_acpi_match(union acpi_subtable_headers *header, + const unsigned long end) +{ + return 0; +} + static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header, const unsigned long end) { struct acpi_madt_rintc *rintc; struct fwnode_handle *fn; + int count; int rc; + if (!rintc_acpi_data) { + count = acpi_table_parse_madt(ACPI_MADT_TYPE_RINTC, riscv_intc_acpi_match, 0); + if (count <= 0) + return -EINVAL; + + rintc_acpi_data = kcalloc(count, sizeof(*rintc_acpi_data), GFP_KERNEL); + if (!rintc_acpi_data) + return -ENOMEM; + } + rintc = (struct acpi_madt_rintc *)header; + rintc_acpi_data[nr_rintc] = kzalloc(sizeof(*rintc_acpi_data[0]), GFP_KERNEL); + if (!rintc_acpi_data[nr_rintc]) + return -ENOMEM; + + rintc_acpi_data[nr_rintc]->ext_intc_id = rintc->ext_intc_id; + rintc_acpi_data[nr_rintc]->hart_id = rintc->hart_id; + rintc_acpi_data[nr_rintc]->imsic_addr = rintc->imsic_addr; + rintc_acpi_data[nr_rintc]->imsic_size = rintc->imsic_size; + nr_rintc++; /* * The ACPI MADT will have one INTC for each CPU (or HART) @@ -277,6 +382,8 @@ static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header, rc = riscv_intc_init_common(fn, &riscv_intc_chip); if (rc) irq_domain_free_fwnode(fn); + else + acpi_set_irq_model(ACPI_IRQ_MODEL_RINTC, riscv_acpi_get_gsi_domain_id); return rc; } diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 05b7357bd25861bf5e306c3962fe0e1fdc2e6e44..7b6e191236ec8852e0528b5316e73b02c14578bc 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -1518,3 +1519,184 @@ static int __init acpi_pci_init(void) return 0; } arch_initcall(acpi_pci_init); + +#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV) + +/* + * Try to assign the IRQ number when probing a new device + */ +int pcibios_alloc_irq(struct pci_dev *dev) +{ + if (!acpi_disabled) + acpi_pci_irq_enable(dev); + + return 0; +} + +struct acpi_pci_generic_root_info { + struct acpi_pci_root_info common; + struct pci_config_window *cfg; /* config space mapping */ +}; + +int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) +{ + struct pci_config_window *cfg = bus->sysdata; + struct acpi_device *adev = to_acpi_device(cfg->parent); + struct acpi_pci_root *root = acpi_driver_data(adev); + + return root->segment; +} + +int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) +{ + struct pci_config_window *cfg; + struct acpi_device *adev; + struct device *bus_dev; + + if (acpi_disabled) + return 0; + + cfg = bridge->bus->sysdata; + + /* + * On Hyper-V there is no corresponding ACPI device for a root bridge, + * therefore ->parent is set as NULL by the driver. And set 'adev' as + * NULL in this case because there is no proper ACPI device. + */ + if (!cfg->parent) + adev = NULL; + else + adev = to_acpi_device(cfg->parent); + + bus_dev = &bridge->bus->dev; + + ACPI_COMPANION_SET(&bridge->dev, adev); + set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev))); + + return 0; +} + +static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci) +{ + struct resource_entry *entry, *tmp; + int status; + + status = acpi_pci_probe_root_resources(ci); + resource_list_for_each_entry_safe(entry, tmp, &ci->resources) { + if (!(entry->res->flags & IORESOURCE_WINDOW)) + resource_list_destroy_entry(entry); + } + return status; +} + +/* + * Lookup the bus range for the domain in MCFG, and set up config space + * mapping. + */ +static struct pci_config_window * +pci_acpi_setup_ecam_mapping(struct acpi_pci_root *root) +{ + struct device *dev = &root->device->dev; + struct resource *bus_res = &root->secondary; + u16 seg = root->segment; + const struct pci_ecam_ops *ecam_ops; + struct resource cfgres; + struct acpi_device *adev; + struct pci_config_window *cfg; + int ret; + + ret = pci_mcfg_lookup(root, &cfgres, &ecam_ops); + if (ret) { + dev_err(dev, "%04x:%pR ECAM region not found\n", seg, bus_res); + return NULL; + } + + adev = acpi_resource_consumer(&cfgres); + if (adev) + dev_info(dev, "ECAM area %pR reserved by %s\n", &cfgres, + dev_name(&adev->dev)); + else + dev_warn(dev, FW_BUG "ECAM area %pR not reserved in ACPI namespace\n", + &cfgres); + + cfg = pci_ecam_create(dev, &cfgres, bus_res, ecam_ops); + if (IS_ERR(cfg)) { + dev_err(dev, "%04x:%pR error %ld mapping ECAM\n", seg, bus_res, + PTR_ERR(cfg)); + return NULL; + } + + return cfg; +} + +/* release_info: free resources allocated by init_info */ +static void pci_acpi_generic_release_info(struct acpi_pci_root_info *ci) +{ + struct acpi_pci_generic_root_info *ri; + + ri = container_of(ci, struct acpi_pci_generic_root_info, common); + pci_ecam_free(ri->cfg); + kfree(ci->ops); + kfree(ri); +} + +/* Interface called from ACPI code to setup PCI host controller */ +struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) +{ + struct acpi_pci_generic_root_info *ri; + struct pci_bus *bus, *child; + struct acpi_pci_root_ops *root_ops; + struct pci_host_bridge *host; + + ri = kzalloc(sizeof(*ri), GFP_KERNEL); + if (!ri) + return NULL; + + root_ops = kzalloc(sizeof(*root_ops), GFP_KERNEL); + if (!root_ops) { + kfree(ri); + return NULL; + } + + ri->cfg = pci_acpi_setup_ecam_mapping(root); + if (!ri->cfg) { + kfree(ri); + kfree(root_ops); + return NULL; + } + + root_ops->release_info = pci_acpi_generic_release_info; + root_ops->prepare_resources = pci_acpi_root_prepare_resources; + root_ops->pci_ops = (struct pci_ops *)&ri->cfg->ops->pci_ops; + bus = acpi_pci_root_create(root, root_ops, &ri->common, ri->cfg); + if (!bus) + return NULL; + + /* If we must preserve the resource configuration, claim now */ + host = pci_find_host_bridge(bus); + if (host->preserve_config) + pci_bus_claim_resources(bus); + + /* + * Assign whatever was left unassigned. If we didn't claim above, + * this will reassign everything. + */ + pci_assign_unassigned_root_bus_resources(bus); + + list_for_each_entry(child, &bus->children, node) + pcie_bus_configure_settings(child); + + return bus; +} + +void pcibios_add_bus(struct pci_bus *bus) +{ + acpi_pci_add_bus(bus); +} + +void pcibios_remove_bus(struct pci_bus *bus) +{ + acpi_pci_remove_bus(bus); +} + +#endif diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index c536028e92dc2e4c5349bc9153b1cbcfa757aed9..59b350f0a28cc7a25bdf27dbe4e3d5bd98c8d497 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -825,6 +825,65 @@ void serial8250_resume_port(int line) } EXPORT_SYMBOL(serial8250_resume_port); +/* + * Generic 16550A platform devices + */ +static int serial8250_platform_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct uart_8250_port uart = { 0 }; + struct resource *regs; + unsigned char iotype; + int ret, line; + + regs = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (regs) { + uart.port.iobase = regs->start; + iotype = UPIO_PORT; + } else { + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(dev, "no registers defined\n"); + return -EINVAL; + } + + uart.port.mapbase = regs->start; + uart.port.mapsize = resource_size(regs); + uart.port.flags = UPF_IOREMAP; + iotype = UPIO_MEM; + } + + /* Default clock frequency*/ + uart.port.uartclk = 1843200; + uart.port.type = PORT_16550A; + uart.port.dev = &pdev->dev; + uart.port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; + ret = uart_read_and_validate_port_properties(&uart.port); + /* no interrupt -> fall back to polling */ + if (ret == -ENXIO) + ret = 0; + if (ret) + return ret; + + if (uart.port.mapbase) { + uart.port.membase = devm_ioremap(dev, uart.port.mapbase, uart.port.mapsize); + if (!uart.port.membase) + return -ENOMEM; + } + + /* + * The previous call may not set iotype correctly when reg-io-width + * property is absent and it doesn't support IO port resource. + */ + uart.port.iotype = iotype; + + line = serial8250_register_8250_port(&uart); + if (line < 0) + return -ENODEV; + + return 0; +} + /* * Register a set of serial devices attached to a platform device. The * list is terminated with a zero flags entry, which means we expect @@ -835,7 +894,15 @@ static int serial8250_probe(struct platform_device *dev) struct plat_serial8250_port *p = dev_get_platdata(&dev->dev); struct uart_8250_port uart; int ret, i, irqflag = 0; + struct fwnode_handle *fwnode = dev_fwnode(&dev->dev); + /* + * Probe platform UART devices defined using standard hardware + * discovery mechanism like ACPI or DT. Support only ACPI based + * serial device for now. + */ + if (!p && is_acpi_node(fwnode)) + return serial8250_platform_probe(dev); memset(&uart, 0, sizeof(uart)); if (share_irqs) @@ -924,6 +991,12 @@ static int serial8250_resume(struct platform_device *dev) return 0; } +static const struct acpi_device_id acpi_platform_serial_table[] = { + { "RSCV0003", 0 }, // RISC-V Generic 16550A UART + { } +}; +MODULE_DEVICE_TABLE(acpi, acpi_platform_serial_table); + static struct platform_driver serial8250_isa_driver = { .probe = serial8250_probe, .remove = serial8250_remove, @@ -931,6 +1004,7 @@ static struct platform_driver serial8250_isa_driver = { .resume = serial8250_resume, .driver = { .name = "serial8250", + .acpi_match_table = ACPI_PTR(acpi_platform_serial_table), }, }; diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index a867baf7beab0dc28240e256c096e1f0c6486052..58e22651404cfea5c749914b8d5c95b6a80f1dbe 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -365,6 +365,24 @@ struct acpi_device_data { struct acpi_gpio_mapping; +struct acpi_device_software_node_port { + unsigned int port_nr; +}; + +/** + * struct acpi_device_software_nodes - Software nodes for an ACPI device + * @nodes: Software nodes for root as well as ports and endpoints. + * @nodeprts: Array of software node pointers, for (un)registering them. + * @ports: Information related to each port and endpoint within a port. + * @num_ports: The number of ports. + */ +struct acpi_device_software_nodes { + struct software_node *nodes; + const struct software_node **nodeptrs; + struct acpi_device_software_node_port *ports; + unsigned int num_ports; +}; + /* Device */ struct acpi_device { u32 pld_crc; @@ -819,6 +837,9 @@ static inline void acpi_put_acpi_dev(struct acpi_device *adev) { acpi_dev_put(adev); } + +int acpi_scan_add_dep(acpi_handle handle, struct acpi_handle_list *dep_devices); +u32 arch_acpi_add_auto_dep(acpi_handle handle); #else /* CONFIG_ACPI */ static inline int register_acpi_bus_type(void *bus) { return 0; } diff --git a/include/linux/acpi.h b/include/linux/acpi.h index ced27152c8ccc40056a623da3dd0678ce644ad1a..846e100fcef57ca562271a14420769b745beff7d 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -98,6 +98,7 @@ enum acpi_irq_model_id { #ifdef CONFIG_SW64 ACPI_IRQ_MODEL_SWPIC, #endif + ACPI_IRQ_MODEL_RINTC, ACPI_IRQ_MODEL_COUNT }; @@ -1342,6 +1343,8 @@ struct acpi_probe_entry { kernel_ulong_t driver_data; }; +void arch_sort_irqchip_probe(struct acpi_probe_entry *ap_head, int nr); + #define ACPI_DECLARE_PROBE_ENTRY(table, name, table_id, subtable, \ valid, data, fn) \ static const struct acpi_probe_entry __acpi_probe_##name \ @@ -1553,6 +1556,12 @@ void acpi_arm_init(void); static inline void acpi_arm_init(void) { } #endif +#ifdef CONFIG_RISCV +void acpi_riscv_init(void); +#else +static inline void acpi_riscv_init(void) { } +#endif + #ifdef CONFIG_ACPI_PCC void acpi_init_pcc(void); #else diff --git a/include/linux/irqchip/riscv-imsic.h b/include/linux/irqchip/riscv-imsic.h index faf0b800b1b0ffa720bbbeed9b346419bbba30c5..7494952c55187af5e4711218493b0c6521687f27 100644 --- a/include/linux/irqchip/riscv-imsic.h +++ b/include/linux/irqchip/riscv-imsic.h @@ -8,6 +8,8 @@ #include #include +#include +#include #include #define IMSIC_MMIO_PAGE_SHIFT 12 @@ -84,4 +86,11 @@ static inline const struct imsic_global_config *imsic_get_global_config(void) #endif +#ifdef CONFIG_ACPI +int imsic_platform_acpi_probe(struct fwnode_handle *fwnode); +struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev); +#else +static inline struct fwnode_handle *imsic_acpi_get_fwnode(struct device *dev) { return NULL; } +#endif + #endif