eab13241a0
hwreport writes one folder to the first read-write FAT mount, or mounts the first USB stick that takes vfat itself and unmounts it afterwards: summary.txt (machine, firmware, CPU, memory, every PCI and USB device with its driver or "-- no driver"), dmesg.txt, lspci.txt in the shape of lspci -nnk -xxx, lsusb.txt, dmi.txt, memmap.txt, the ACPI tables as raw .dat files iasl -d reads, and copies of /proc. Serials, the UUID and the MSDM/SLIC tables (a Windows licence key) are left out. It reads /sys, which is new: sysfs at Linux's paths and in Linux's formats -- /sys/bus/pci/devices with uevent, config and resource, /sys/bus/usb/devices, /sys/firmware/acpi/tables, dmi/tables, memmap and efi, /sys/class/dmi/id. toybox's lspci and lsusb work unmodified against it. The USB core now keeps a table of attached devices for it. The machine's name comes from SMBIOS (kernel/dev/dmi.c). The UEFI loader hands over the entry point from the configuration table, the kernel falls back to the 0xF0000 scan, and the log gets Linux's "DMI:" line. Two bugs found on the way: - The loader handed over at most 40 memory-map entries, in firmware order. A laptop's UEFI map is 60-150 descriptors with RAM above 4 GB listed last, so that is what was dropped. The entries now have their own area at 0x31000 with room for 256, are sorted before merging, and the kernel's 32 usable regions keep the largest when there are more. - MemTotal and sysinfo's totalram were PHYSTOP, an address, which counts the PCI hole: a 6 GB machine reported 8. Now the usable RAM, summed. usb.ids moves to /usr/share/hwdata, where lsusb looks for it, and pci.ids joins it (`make pci-ids`, BSD-3-Clause like usb.ids). Checked under QEMU q35: the report written to a FAT32 stick, fsck.fat clean, DSDT.dat disassembled by iasl on the host, lspci -k and lsusb showing names, 6 GB of RAM seen as 6137 MB. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
63 lines
2.6 KiB
C
63 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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// What the firmware and the buses said about this machine, kept so /sys can
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// say it again. kernel/fs/sysfs.c is the reader; each producer is named
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// beside its part.
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//
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// Read-only views, copied out under whatever lock the producer has, so a
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// caller never holds a pointer into a table that may change under it.
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// --- the memory map, as the loader handed it over (kernel/arch/x86_64/e820.c)
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struct e820_rec {
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uint64 base, len;
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uint32 type; // E820: 1 RAM, 2 reserved, 3 ACPI, 4 NVS, 5 bad
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};
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int e820_nth(int i, struct e820_rec *out); // 0, or -1 past the end
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// The RAM the page allocator was given, in bytes: MemTotal and sysinfo's
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// totalram. Not PHYSTOP, which is an address and counts the PCI hole.
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uint64 ram_total_bytes(void);
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// --- ACPI tables (kernel/arch/x86_64/acpi.c)
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//
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// Every table the RSDT or XSDT lists, then the DSDT and FACS, which only the
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// FADT points at. `sig` gets four characters, no terminator. 0 for a table,
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// 1 for an empty slot (keep counting), -1 past the end.
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int acpi_table_nth(int i, uint64 *pa, uint32 *len, char sig[4]);
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// --- SMBIOS (kernel/dev/dmi.c)
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void dmi_init(void);
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// The entry point structure and the table it describes, both physical.
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int dmi_entry(uint64 *pa, uint32 *len);
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int dmi_table(uint64 *pa, uint32 *len);
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// Bytes of physical memory, through the direct map or ioremap. 0 on failure.
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void *phys_view(uint64 pa, uint64 len);
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// The strings Linux publishes in /sys/class/dmi/id, under its names. Serial
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// numbers and the UUID are left out on purpose: nothing here needs them, and a
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// hardware report is meant to be handed to somebody else.
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enum {
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DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_BIOS_DATE, DMI_BIOS_RELEASE,
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DMI_SYS_VENDOR, DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_PRODUCT_SKU,
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DMI_PRODUCT_FAMILY,
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DMI_BOARD_VENDOR, DMI_BOARD_NAME, DMI_BOARD_VERSION,
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DMI_CHASSIS_VENDOR, DMI_CHASSIS_TYPE, DMI_CHASSIS_VERSION,
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DMI_NFIELDS
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};
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extern const char *const dmi_field_names[DMI_NFIELDS];
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// Length written (no terminator counted), or -1 if the machine does not say.
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int dmi_field(int f, char *out, int cap);
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// 1 if the UEFI loader booted this kernel.
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int boot_is_efi(void);
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// --- USB devices (kernel/drivers/usb/core/usb.c), one per addressed device
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struct usb_info {
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int bus, devnum, speed; // speed: USB_SPEED_*
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uint16 vid, pid, bcd;
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uint8 cls, subcls, proto; // the device descriptor's
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uint8 nconf;
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char path[24]; // Linux's name: "1-3", "2-1.4"
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char driver[16]; // the first interface's, or empty
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};
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int usb_info_nth(int i, struct usb_info *out);
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