pcib allocation failure

[deeptech71 at gmail.com]

On Sat, May 21, 2011 at 3:59 PM, deeptech71 at gmail.com
<deeptech71 at gmail.com> wrote:
> On Thu, May 19, 2011 at 11:35 PM, John Baldwin <jhb at freebsd.org> wrote:
>> Index: pci_pci.c
>> ===================================================================
>> --- pci_pci.c   (revision 222093)
>> +++ pci_pci.c   (working copy)
>> @@ -162,8 +162,13 @@ pcib_write_windows(struct pcib_softc *sc, int mask
>>  {
>>        device_t dev;
>>        uint32_t val;
>> +       uint16_t cmd;
>>
>>        dev = sc->dev;
>> +       cmd = pci_read_config(dev, PCIR_COMMAND, 2);
>> +       if (cmd & (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN))
>> +               pci_write_config(dev, PCIR_COMMAND,
>> +                   cmd & ~(PCIM_CMD_PORTEN | PCIM_CMD_MEMEN), 2);
>>        if (sc->io.valid && mask & WIN_IO) {
>>                val = pci_read_config(dev, PCIR_IOBASEL_1, 1);
>>                if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) {
>> @@ -192,6 +197,8 @@ pcib_write_windows(struct pcib_softc *sc, int mask
>>                pci_write_config(dev, PCIR_PMBASEL_1, sc->pmem.base >> 16, 2);
>>                pci_write_config(dev, PCIR_PMLIMITL_1, sc->pmem.limit >> 16, 2);
>>        }
>> +       if (cmd & (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN))
>> +               pci_write_config(dev, PCIR_COMMAND, cmd, 2);
>>  }
>>
>>  static void
>> @@ -231,7 +238,9 @@ pcib_alloc_window(struct pcib_softc *sc, struct pc
>>                    w->name, (uintmax_t)w->base, (uintmax_t)w->limit);
>>                w->base = max_address;
>>                w->limit = 0;
>> +#if 0
>>                pcib_write_windows(sc, w->mask);
>> +#endif
>>                return;
>>        }
>>        pcib_activate_window(sc, type);
>
> that seems to work.

oops, i forgot to set the AGP aperture size to 128M during testing.
that patch actually does NOT work.