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Utilities/lspci: Add verbose flag to show data about PCI BARs

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Use the exposed sysfs interface and print the addresses to the user if
requested to.
This commit is contained in:
Liav A 2022-02-10 15:15:56 +02:00 • committed by Andreas Kling
parent f8df21c7e7
commit bd48e73851
1 changed files with 18 additions and 0 deletions
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18
Userland/Utilities/lspci.cpp
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@ -17,9 +17,11 @@
#include <LibPCIDB/Database.h>
static bool flag_show_numerical = false;
static bool flag_verbose = false;
static const char* format_numerical = "{:04x}:{:02x}:{:02x}.{} {}: {}:{} (rev {:02x})";
static const char* format_textual = "{:04x}:{:02x}:{:02x}.{} {}: {} {} (rev {:02x})";
static const char* format_region = "\tBAR {}: {} region @ {:#x}";
static u32 read_hex_string_from_bytebuffer(ByteBuffer const& buf)
{
@ -45,6 +47,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
Core::ArgsParser args_parser;
args_parser.set_general_help("List PCI devices.");
args_parser.add_option(flag_show_numerical, "Show numerical IDs", "numerical", 'n');
args_parser.add_option(flag_verbose, "Show verbose info on devices", "verbose", 'v');
args_parser.parse(arguments);
const char* format = flag_show_numerical ? format_numerical : format_textual;
@ -128,6 +131,21 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
class_name = String::formatted("{:02x}{:02x}", class_id, subclass_id);
outln(format, domain, bus, device, function, class_name, vendor_name, device_name, revision_id);
if (!flag_verbose)
continue;
for (size_t bar_index = 0; bar_index <= 5; bar_index++) {
auto bar_value_file = Core::File::construct(String::formatted("/sys/bus/pci/{}/bar{}", dir, bar_index));
if (!bar_value_file->open(Core::OpenMode::ReadOnly)) {
dbgln("Error: Could not open {}: {}", bar_value_file->name(), bar_value_file->error_string());
continue;
}
u32 bar_value = read_hex_string_from_bytebuffer(bar_value_file->read_all());
if (bar_value == 0)
continue;
bool memory_region = ((bar_value & 1) == 0);
outln(format_region, bar_index, memory_region ? "Memory" : "IO", bar_value);
}
}
return 0;