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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4876234acc
The IPMI spec states: The purpose of the SPMI Table is to provide a mechanism that can be used by the OSPM (an ACPI term for “OS Operating System-directed configuration and Power Management” essentially meaning an ACPI-aware OS or OS loader) very early in the boot process, e.g., before the ability to execute ACPI control methods in the OS is available. When we are probing IPMI in Linux, ACPI control methods are available, so we shouldn't be probing using SPMI. It could cause some confusion during the probing process. Signed-off-by: Corey Minyard <cminyard@mvista.com>
441 lines
10 KiB
C
441 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* ipmi_si_platform.c
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*
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* Handling for platform devices in IPMI (ACPI, OF, and things
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* coming from the platform.
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/acpi.h>
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#include "ipmi_si.h"
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#include "ipmi_dmi.h"
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#define PFX "ipmi_platform: "
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static bool si_tryplatform = true;
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#ifdef CONFIG_ACPI
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static bool si_tryacpi = true;
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#endif
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#ifdef CONFIG_OF
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static bool si_tryopenfirmware = true;
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#endif
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#ifdef CONFIG_DMI
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static bool si_trydmi = true;
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#else
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static bool si_trydmi = false;
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#endif
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module_param_named(tryplatform, si_tryplatform, bool, 0);
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MODULE_PARM_DESC(tryplatform, "Setting this to zero will disable the"
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" default scan of the interfaces identified via platform"
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" interfaces besides ACPI, OpenFirmware, and DMI");
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#ifdef CONFIG_ACPI
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module_param_named(tryacpi, si_tryacpi, bool, 0);
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MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
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" default scan of the interfaces identified via ACPI");
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#endif
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#ifdef CONFIG_OF
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module_param_named(tryopenfirmware, si_tryopenfirmware, bool, 0);
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MODULE_PARM_DESC(tryopenfirmware, "Setting this to zero will disable the"
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" default scan of the interfaces identified via OpenFirmware");
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#endif
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#ifdef CONFIG_DMI
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module_param_named(trydmi, si_trydmi, bool, 0);
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MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
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" default scan of the interfaces identified via DMI");
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#endif
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#ifdef CONFIG_ACPI
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/* For GPE-type interrupts. */
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static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
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u32 gpe_number, void *context)
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{
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struct si_sm_io *io = context;
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ipmi_si_irq_handler(io->irq, io->irq_handler_data);
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return ACPI_INTERRUPT_HANDLED;
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}
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static void acpi_gpe_irq_cleanup(struct si_sm_io *io)
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{
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if (!io->irq)
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return;
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ipmi_irq_start_cleanup(io);
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acpi_remove_gpe_handler(NULL, io->irq, &ipmi_acpi_gpe);
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}
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static int acpi_gpe_irq_setup(struct si_sm_io *io)
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{
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acpi_status status;
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if (!io->irq)
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return 0;
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status = acpi_install_gpe_handler(NULL,
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io->irq,
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ACPI_GPE_LEVEL_TRIGGERED,
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&ipmi_acpi_gpe,
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io);
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if (status != AE_OK) {
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dev_warn(io->dev,
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"Unable to claim ACPI GPE %d, running polled\n",
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io->irq);
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io->irq = 0;
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return -EINVAL;
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} else {
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io->irq_cleanup = acpi_gpe_irq_cleanup;
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ipmi_irq_finish_setup(io);
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dev_info(io->dev, "Using ACPI GPE %d\n", io->irq);
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return 0;
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}
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}
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#endif
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static struct resource *
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ipmi_get_info_from_resources(struct platform_device *pdev,
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struct si_sm_io *io)
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{
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struct resource *res, *res_second;
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (res) {
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io->addr_type = IPMI_IO_ADDR_SPACE;
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} else {
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (res)
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io->addr_type = IPMI_MEM_ADDR_SPACE;
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}
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if (!res) {
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dev_err(&pdev->dev, "no I/O or memory address\n");
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return NULL;
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}
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io->addr_data = res->start;
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io->regspacing = DEFAULT_REGSPACING;
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res_second = platform_get_resource(pdev,
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(io->addr_type == IPMI_IO_ADDR_SPACE) ?
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IORESOURCE_IO : IORESOURCE_MEM,
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1);
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if (res_second) {
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if (res_second->start > io->addr_data)
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io->regspacing = res_second->start - io->addr_data;
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}
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io->regsize = DEFAULT_REGSIZE;
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io->regshift = 0;
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return res;
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}
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static int platform_ipmi_probe(struct platform_device *pdev)
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{
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struct si_sm_io io;
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u8 type, slave_addr, addr_source;
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int rv;
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rv = device_property_read_u8(&pdev->dev, "addr-source", &addr_source);
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if (rv)
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addr_source = SI_PLATFORM;
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if (addr_source >= SI_LAST)
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return -EINVAL;
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if (addr_source == SI_SMBIOS) {
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if (!si_trydmi)
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return -ENODEV;
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} else {
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if (!si_tryplatform)
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return -ENODEV;
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}
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rv = device_property_read_u8(&pdev->dev, "ipmi-type", &type);
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if (rv)
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return -ENODEV;
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memset(&io, 0, sizeof(io));
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io.addr_source = addr_source;
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dev_info(&pdev->dev, PFX "probing via %s\n",
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ipmi_addr_src_to_str(addr_source));
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switch (type) {
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case SI_KCS:
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case SI_SMIC:
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case SI_BT:
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io.si_type = type;
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break;
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default:
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dev_err(&pdev->dev, "ipmi-type property is invalid\n");
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return -EINVAL;
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}
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if (!ipmi_get_info_from_resources(pdev, &io))
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return -EINVAL;
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rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
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if (rv) {
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dev_warn(&pdev->dev, "device has no slave-addr property\n");
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io.slave_addr = 0x20;
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} else {
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io.slave_addr = slave_addr;
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}
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io.irq = platform_get_irq(pdev, 0);
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if (io.irq > 0)
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io.irq_setup = ipmi_std_irq_setup;
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else
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io.irq = 0;
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io.dev = &pdev->dev;
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pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
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(io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
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io.addr_data, io.regsize, io.regspacing, io.irq);
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ipmi_si_add_smi(&io);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id of_ipmi_match[] = {
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{ .type = "ipmi", .compatible = "ipmi-kcs",
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.data = (void *)(unsigned long) SI_KCS },
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{ .type = "ipmi", .compatible = "ipmi-smic",
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.data = (void *)(unsigned long) SI_SMIC },
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{ .type = "ipmi", .compatible = "ipmi-bt",
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.data = (void *)(unsigned long) SI_BT },
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{},
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};
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MODULE_DEVICE_TABLE(of, of_ipmi_match);
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static int of_ipmi_probe(struct platform_device *pdev)
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{
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const struct of_device_id *match;
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struct si_sm_io io;
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struct resource resource;
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const __be32 *regsize, *regspacing, *regshift;
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struct device_node *np = pdev->dev.of_node;
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int ret;
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int proplen;
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if (!si_tryopenfirmware)
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return -ENODEV;
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dev_info(&pdev->dev, "probing via device tree\n");
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match = of_match_device(of_ipmi_match, &pdev->dev);
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if (!match)
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return -ENODEV;
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if (!of_device_is_available(np))
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return -EINVAL;
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ret = of_address_to_resource(np, 0, &resource);
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if (ret) {
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dev_warn(&pdev->dev, PFX "invalid address from OF\n");
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return ret;
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}
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regsize = of_get_property(np, "reg-size", &proplen);
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if (regsize && proplen != 4) {
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dev_warn(&pdev->dev, PFX "invalid regsize from OF\n");
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return -EINVAL;
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}
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regspacing = of_get_property(np, "reg-spacing", &proplen);
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if (regspacing && proplen != 4) {
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dev_warn(&pdev->dev, PFX "invalid regspacing from OF\n");
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return -EINVAL;
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}
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regshift = of_get_property(np, "reg-shift", &proplen);
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if (regshift && proplen != 4) {
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dev_warn(&pdev->dev, PFX "invalid regshift from OF\n");
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return -EINVAL;
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}
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memset(&io, 0, sizeof(io));
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io.si_type = (enum si_type) match->data;
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io.addr_source = SI_DEVICETREE;
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io.irq_setup = ipmi_std_irq_setup;
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if (resource.flags & IORESOURCE_IO)
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io.addr_type = IPMI_IO_ADDR_SPACE;
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else
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io.addr_type = IPMI_MEM_ADDR_SPACE;
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io.addr_data = resource.start;
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io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
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io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
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io.regshift = regshift ? be32_to_cpup(regshift) : 0;
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io.irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
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io.dev = &pdev->dev;
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dev_dbg(&pdev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
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io.addr_data, io.regsize, io.regspacing, io.irq);
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return ipmi_si_add_smi(&io);
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}
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#else
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#define of_ipmi_match NULL
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static int of_ipmi_probe(struct platform_device *dev)
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{
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return -ENODEV;
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}
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#endif
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#ifdef CONFIG_ACPI
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static int find_slave_address(struct si_sm_io *io, int slave_addr)
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{
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#ifdef CONFIG_IPMI_DMI_DECODE
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if (!slave_addr) {
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u32 flags = IORESOURCE_IO;
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if (io->addr_type == IPMI_MEM_ADDR_SPACE)
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flags = IORESOURCE_MEM;
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slave_addr = ipmi_dmi_get_slave_addr(io->si_type, flags,
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io->addr_data);
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}
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#endif
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return slave_addr;
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}
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static int acpi_ipmi_probe(struct platform_device *pdev)
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{
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struct si_sm_io io;
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acpi_handle handle;
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acpi_status status;
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unsigned long long tmp;
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struct resource *res;
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int rv = -EINVAL;
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if (!si_tryacpi)
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return -ENODEV;
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handle = ACPI_HANDLE(&pdev->dev);
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if (!handle)
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return -ENODEV;
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memset(&io, 0, sizeof(io));
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io.addr_source = SI_ACPI;
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dev_info(&pdev->dev, PFX "probing via ACPI\n");
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io.addr_info.acpi_info.acpi_handle = handle;
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/* _IFT tells us the interface type: KCS, BT, etc */
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status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
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if (ACPI_FAILURE(status)) {
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dev_err(&pdev->dev,
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"Could not find ACPI IPMI interface type\n");
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goto err_free;
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}
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switch (tmp) {
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case 1:
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io.si_type = SI_KCS;
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break;
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case 2:
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io.si_type = SI_SMIC;
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break;
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case 3:
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io.si_type = SI_BT;
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break;
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case 4: /* SSIF, just ignore */
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rv = -ENODEV;
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goto err_free;
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default:
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dev_info(&pdev->dev, "unknown IPMI type %lld\n", tmp);
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goto err_free;
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}
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res = ipmi_get_info_from_resources(pdev, &io);
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if (!res) {
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rv = -EINVAL;
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goto err_free;
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}
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/* If _GPE exists, use it; otherwise use standard interrupts */
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status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
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if (ACPI_SUCCESS(status)) {
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io.irq = tmp;
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io.irq_setup = acpi_gpe_irq_setup;
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} else {
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int irq = platform_get_irq(pdev, 0);
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if (irq > 0) {
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io.irq = irq;
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io.irq_setup = ipmi_std_irq_setup;
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}
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}
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io.slave_addr = find_slave_address(&io, io.slave_addr);
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io.dev = &pdev->dev;
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dev_info(io.dev, "%pR regsize %d spacing %d irq %d\n",
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res, io.regsize, io.regspacing, io.irq);
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return ipmi_si_add_smi(&io);
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err_free:
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return rv;
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}
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static const struct acpi_device_id acpi_ipmi_match[] = {
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{ "IPI0001", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, acpi_ipmi_match);
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#else
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static int acpi_ipmi_probe(struct platform_device *dev)
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{
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return -ENODEV;
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}
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#endif
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static int ipmi_probe(struct platform_device *pdev)
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{
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if (pdev->dev.of_node && of_ipmi_probe(pdev) == 0)
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return 0;
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if (acpi_ipmi_probe(pdev) == 0)
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return 0;
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return platform_ipmi_probe(pdev);
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}
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static int ipmi_remove(struct platform_device *pdev)
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{
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return ipmi_si_remove_by_dev(&pdev->dev);
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}
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struct platform_driver ipmi_platform_driver = {
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.driver = {
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.name = DEVICE_NAME,
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.of_match_table = of_ipmi_match,
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.acpi_match_table = ACPI_PTR(acpi_ipmi_match),
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},
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.probe = ipmi_probe,
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.remove = ipmi_remove,
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};
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void ipmi_si_platform_init(void)
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{
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int rv = platform_driver_register(&ipmi_platform_driver);
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if (rv)
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pr_err(PFX "Unable to register driver: %d\n", rv);
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}
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void ipmi_si_platform_shutdown(void)
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{
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platform_driver_unregister(&ipmi_platform_driver);
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}
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