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From: John Baldwin <jhb@freebsd.org>
To: Oliver Pinter <oliver.pinter@hardenedbsd.org>
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Subject: Re: svn commit: r297501 - head/usr.sbin/pciconf
Date: Sun, 03 Apr 2016 15:55:54 -0700
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On Saturday, April 02, 2016 11:49:53 AM Oliver Pinter wrote:
> > +       if (cap & PCIEM_SLOT_CAP_HPS)
> > +               printf(" surprise");
> 
> 
> What is this surprise string or state? Or is this a forgotten debug string?

It's an actual thing in the spec.  "Surprise" insertion/removal means that devices
can be hotplugged without requiring notification to the OS ahead of time.  The
expresscard slots in my x220 actually report this:

pcib3@pci0:0:28:3:      class=0x060400 card=0x21da17aa chip=0x1c168086 rev=0xb4 hdr=0x01
    cap 10[40] = PCI-Express 2 root port max data 128(128)
                 link x0(x1) speed 0.0(5.0) ASPM L0s/L1(L0s/L1)
                 slot 3 power limit 100 mW HotPlug(empty) surprise
    cap 05[80] = MSI supports 1 message 
    cap 0d[90] = PCI Bridge card=0x21da17aa
    cap 01[a0] = powerspec 2  supports D0 D3  current D0

and after inserting a card:

pcib3@pci0:0:28:3:      class=0x060400 card=0x21da17aa chip=0x1c168086 rev=0xb4 hdr=0x01
    cap 10[40] = PCI-Express 2 root port max data 128(128)
                 link x1(x1) speed 2.5(5.0) ASPM disabled(L0s/L1)
                 slot 3 power limit 100 mW HotPlug(present) surprise
    cap 05[80] = MSI supports 1 message 
    cap 0d[90] = PCI Bridge card=0x21da17aa
    cap 01[a0] = powerspec 2  supports D0 D3  current D0

-- 
John Baldwin