Class: AmdgpuFan::PCI

Inherits:
Object
  • Object
show all
Defined in:
lib/amdgpu_fan/pci.rb

Overview

PCI

Retrieve device information from PCI IDs. pci-ids.ucw.cz/

Constant Summary collapse

TMP_FILE = 
'/tmp/pci.ids.txt'
URL = 
'https://pci-ids.ucw.cz/v2.2/pci.ids'

Class Method Summary collapse

Class Method Details

.device_name(vendor_id, device_id, subdevice_id) ⇒ Object

Return the device name if available



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# File 'lib/amdgpu_fan/pci.rb', line 20

def self.device_name(vendor_id, device_id, subdevice_id)
  device = info.dig vendor_id, :devices, device_id

  device.dig(subdevice_id, :name) || device[:name]
end

.info ⇒ Object 



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# File 'lib/amdgpu_fan/pci.rb', line 30

def self.info
  current_vendor_id = nil
  current_device_id = nil

  @info = raw.each_line.with_object({}) do |line, hash|
    next if line.empty? || line.start_with?('#')

    if line[0] =~ /(\d|[a-z])/
      # Vendor line
      current_vendor_id = line.split('  ').first.to_i(16)
      vendor_name = line.split('  ').last.strip
      hash[current_vendor_id] = { name: vendor_name, devices: {} }
    elsif line[0..1] =~ /\t\w/
      # Device line
      current_device_id = line.split('  ').first.to_i(16)
      device_name = line.split('  ').last.strip
      hash[current_vendor_id][:devices][current_device_id] = { name: device_name }
    elsif line[0..2] =~ /\t\t\w/
      # Subvendor line
      # subvendor_id = line.split(' ').first.to_i(16)
      subdevice_id = line.split[1].to_i(16)
      subdevice_name = line.split('  ')[1].strip
      hash[current_vendor_id][:devices][current_device_id][subdevice_id] =
        { name: subdevice_name }
    end
  end
end

.raw ⇒ Object 



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# File 'lib/amdgpu_fan/pci.rb', line 58

def self.raw
  File.write(TMP_FILE, Net::HTTP.get(URI(URL))) unless File.exist?(TMP_FILE)

  @raw ||= File.read(TMP_FILE)
end

.vendor_name(vendor_id) ⇒ Object 



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# File 'lib/amdgpu_fan/pci.rb', line 26

def self.vendor_name(vendor_id)
  info.dig vendor_id, :name
end