apps.io: add support for pci type and intel_app.

src/apps/intel/intel_app.lua

@@ -35,6 +35,21 @@ local C = ffi.C
 -- The `driver' variable is used as a reference to the driver class in
 -- order to interchangably use NIC drivers.
 driver = Intel82599
+-- The `io' variable is used by lib.hardware.pci to forward queue configuration
+-- to NIC drivers.
+io = {}
+function io:configure (c, _, conf)
+   local nqueues, vmdq = 0, false
+   for _ in pairs(conf.queues) do
+      nqueues = nqueues + 1
+      if nqueues > 1 then vmdq = true; break end
+   end
+   for name, qconf in pairs(conf.queues) do
+      qconf.pciaddr = conf.device
+      qconf.vmdq = vmdq
+      config.app(c, name, Intel82599, qconf)
+   end
+end
 
 -- table pciaddr => {pf, vflist}
 local devices = {}

src/lib/hardware/pci.lua

@@ -2,6 +2,7 @@
 
 module(...,package.seeall)
 
+local io = require("apps.io.io")
 local ffi = require("ffi")
 local C = ffi.C
 local S = require("syscall")
@@ -218,3 +219,9 @@ function print_device_summary ()
       print(fmt:format(unpack(values)))
    end
 end
+
+
+PCIDriver = io.register('pci', {})
+function PCIDriver:configure (c, name, conf)
+   require(device_info(conf.device).driver).io:configure(c, name, conf)
+end