| Message ID | 20230803175916.3174453-6-sunilvl@ventanamicro.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | RISC-V: ACPI: Add external interrupt controller support | expand |
On Thu, Aug 03, 2023 at 11:29:00PM +0530, Sunil V L wrote: > The functions defined in arm64 for ACPI support are required > for RISC-V also. To avoid duplication, copy these functions > to common location. ... > } > + Stray change. > arch_initcall(acpi_pci_init); > + > +#if defined(CONFIG_ARM64) ... > + 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; Can be cfg = pci_ecam_create(dev, &cfgres, bus_res, ecam_ops); ret = PTR_ERR_OR_ZERO(cfg); if (ret) { dev_err(dev, "%04x:%pR error %d mapping ECAM\n", seg, bus_res, ret); but as far as I understand this is in the original code like this, so consider as a suggestion for further cleanups.
On Fri, Aug 04, 2023 at 08:53:14AM +0300, Andy Shevchenko wrote: > On Thu, Aug 03, 2023 at 11:29:00PM +0530, Sunil V L wrote: > > The functions defined in arm64 for ACPI support are required > > for RISC-V also. To avoid duplication, copy these functions > > to common location. > > ... > > > } > > + > > Stray change. > Let me remove this in next version. > > arch_initcall(acpi_pci_init); > > + > > +#if defined(CONFIG_ARM64) > > ... > > > + 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; > > Can be > > cfg = pci_ecam_create(dev, &cfgres, bus_res, ecam_ops); > ret = PTR_ERR_OR_ZERO(cfg); > if (ret) { > dev_err(dev, "%04x:%pR error %d mapping ECAM\n", seg, bus_res, ret); > > but as far as I understand this is in the original code like this, so consider > as a suggestion for further cleanups. > Good suggestion!. Sure, we can cleanup as a follow on patch. Thanks, Sunil
On Thu, Aug 03, 2023 at 11:29:00PM +0530, Sunil V L wrote: > The functions defined in arm64 for ACPI support are required > for RISC-V also. To avoid duplication, copy these functions > to common location. I assume this is a "move" (not a copy) and the code being moved isn't being changed. If so, Acked-by: Bjorn Helgaas <bhelgaas@google.com> > Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> > --- > arch/arm64/kernel/pci.c | 193 ---------------------------------------- > drivers/pci/pci-acpi.c | 182 +++++++++++++++++++++++++++++++++++++ > 2 files changed, 182 insertions(+), 193 deletions(-) > > diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c > index 2276689b5411..fd9a7bed83ce 100644 > --- a/arch/arm64/kernel/pci.c > +++ b/arch/arm64/kernel/pci.c > @@ -6,30 +6,7 @@ > * Copyright (C) 2014 ARM Ltd. > */ > > -#include <linux/acpi.h> > -#include <linux/init.h> > -#include <linux/io.h> > -#include <linux/kernel.h> > -#include <linux/mm.h> > -#include <linux/of_pci.h> > -#include <linux/of_platform.h> > #include <linux/pci.h> > -#include <linux/pci-acpi.h> > -#include <linux/pci-ecam.h> > -#include <linux/slab.h> > - > -#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. > @@ -63,173 +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/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c > index a05350a4e49c..d6b2d64b8237 100644 > --- a/drivers/pci/pci-acpi.c > +++ b/drivers/pci/pci-acpi.c > @@ -15,6 +15,7 @@ > #include <linux/pci_hotplug.h> > #include <linux/module.h> > #include <linux/pci-acpi.h> > +#include <linux/pci-ecam.h> > #include <linux/pm_runtime.h> > #include <linux/pm_qos.h> > #include <linux/rwsem.h> > @@ -1517,4 +1518,185 @@ static int __init acpi_pci_init(void) > > return 0; > } > + > arch_initcall(acpi_pci_init); > + > +#if defined(CONFIG_ARM64) > +/* > + * 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 > -- > 2.39.2 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
On Mon, Aug 07, 2023 at 05:41:52PM -0500, Bjorn Helgaas wrote: > On Thu, Aug 03, 2023 at 11:29:00PM +0530, Sunil V L wrote: > > The functions defined in arm64 for ACPI support are required > > for RISC-V also. To avoid duplication, copy these functions > > to common location. > > I assume this is a "move" (not a copy) and the code being moved isn't > being changed. > Hi Bjorn, Thank you very much for the review!. Yes, it is a move as is. Let me update the commit message in next version. Thanks! Sunil > If so, > > Acked-by: Bjorn Helgaas <bhelgaas@google.com> > > > Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> > > --- > > arch/arm64/kernel/pci.c | 193 ---------------------------------------- > > drivers/pci/pci-acpi.c | 182 +++++++++++++++++++++++++++++++++++++ > > 2 files changed, 182 insertions(+), 193 deletions(-) > > > > diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c > > index 2276689b5411..fd9a7bed83ce 100644 > > --- a/arch/arm64/kernel/pci.c > > +++ b/arch/arm64/kernel/pci.c > > @@ -6,30 +6,7 @@ > > * Copyright (C) 2014 ARM Ltd. > > */ > > > > -#include <linux/acpi.h> > > -#include <linux/init.h> > > -#include <linux/io.h> > > -#include <linux/kernel.h> > > -#include <linux/mm.h> > > -#include <linux/of_pci.h> > > -#include <linux/of_platform.h> > > #include <linux/pci.h> > > -#include <linux/pci-acpi.h> > > -#include <linux/pci-ecam.h> > > -#include <linux/slab.h> > > - > > -#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. > > @@ -63,173 +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/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c > > index a05350a4e49c..d6b2d64b8237 100644 > > --- a/drivers/pci/pci-acpi.c > > +++ b/drivers/pci/pci-acpi.c > > @@ -15,6 +15,7 @@ > > #include <linux/pci_hotplug.h> > > #include <linux/module.h> > > #include <linux/pci-acpi.h> > > +#include <linux/pci-ecam.h> > > #include <linux/pm_runtime.h> > > #include <linux/pm_qos.h> > > #include <linux/rwsem.h> > > @@ -1517,4 +1518,185 @@ static int __init acpi_pci_init(void) > > > > return 0; > > } > > + > > arch_initcall(acpi_pci_init); > > + > > +#if defined(CONFIG_ARM64) > > +/* > > + * 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 > > -- > > 2.39.2 > > > > > > _______________________________________________ > > linux-arm-kernel mailing list > > linux-arm-kernel@lists.infradead.org > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
On Mon, Aug 07, 2023 at 05:41:52PM -0500, Bjorn Helgaas wrote: > On Thu, Aug 03, 2023 at 11:29:00PM +0530, Sunil V L wrote: > > The functions defined in arm64 for ACPI support are required > > for RISC-V also. To avoid duplication, copy these functions > > to common location. > > I assume this is a "move" (not a copy) and the code being moved isn't > being changed. Not sure is proper -M -C will help to recognize that on the patch generation. Maybe -M 50 (or another carefully chosen percentage) can help.
On Tue, Aug 08, 2023 at 10:22:10AM +0530, Sunil V L wrote: > On Mon, Aug 07, 2023 at 05:41:52PM -0500, Bjorn Helgaas wrote: > > On Thu, Aug 03, 2023 at 11:29:00PM +0530, Sunil V L wrote: > > > The functions defined in arm64 for ACPI support are required > > > for RISC-V also. To avoid duplication, copy these functions > > > to common location. > > > > I assume this is a "move" (not a copy) and the code being moved isn't > > being changed. > > Thank you very much for the review!. Yes, it is a move as is. Let me > update the commit message in next version. Try to play with -M -C
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 2276689b5411..fd9a7bed83ce 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -6,30 +6,7 @@ * Copyright (C) 2014 ARM Ltd. */ -#include <linux/acpi.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/of_pci.h> -#include <linux/of_platform.h> #include <linux/pci.h> -#include <linux/pci-acpi.h> -#include <linux/pci-ecam.h> -#include <linux/slab.h> - -#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. @@ -63,173 +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/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index a05350a4e49c..d6b2d64b8237 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -15,6 +15,7 @@ #include <linux/pci_hotplug.h> #include <linux/module.h> #include <linux/pci-acpi.h> +#include <linux/pci-ecam.h> #include <linux/pm_runtime.h> #include <linux/pm_qos.h> #include <linux/rwsem.h> @@ -1517,4 +1518,185 @@ static int __init acpi_pci_init(void) return 0; } + arch_initcall(acpi_pci_init); + +#if defined(CONFIG_ARM64) +/* + * 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
The functions defined in arm64 for ACPI support are required for RISC-V also. To avoid duplication, copy these functions to common location. Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> --- arch/arm64/kernel/pci.c | 193 ---------------------------------------- drivers/pci/pci-acpi.c | 182 +++++++++++++++++++++++++++++++++++++ 2 files changed, 182 insertions(+), 193 deletions(-)