/**
* A siba(4) and bcma(4)-compatible bhndb_set_window_addr implementation.
*
* On siba(4) devices, it's possible that writing a PCI window register may
* not succeed; it's necessary to immediately read the configuration register
* and retry if not set to the desired value.
*
* This is not necessary on bcma(4) devices, but other than the overhead of
* validating the register, there's no harm in performing the verification.
*/
static int
bhndb_pci_compat_setregwin(struct bhndb_pci_softc *sc,
const struct bhndb_regwin *rw, bhnd_addr_t addr)
{
device_t parent;
int error;
parent = sc->bhndb.parent_dev;
if (rw->win_type != BHNDB_REGWIN_T_DYN)
return (ENODEV);
for (u_int i = 0; i < BHNDB_PCI_BARCTRL_WRITE_RETRY; i++) {
if ((error = bhndb_pci_fast_setregwin(sc, rw, addr)))
return (error);
if (pci_read_config(parent, rw->dyn.cfg_offset, 4) == addr)
return (0);
DELAY(10);
}
/* Unable to set window */
return (ENODEV);
}
/**
* A siba(4) and bcma(4)-compatible bhndb_set_window_addr implementation.
*
* On siba(4) devices, it's possible that writing a PCI window register may
* not succeed; it's necessary to immediately read the configuration register
* and retry if not set to the desired value.
*
* This is not necessary on bcma(4) devices, but other than the overhead of
* validating the register, there's no harm in performing the verification.
*/
static int
bhndb_pci_compat_setregwin(device_t dev, device_t pci_dev,
const struct bhndb_regwin *rw, bhnd_addr_t addr)
{
int error;
int reg;
if (rw->win_type != BHNDB_REGWIN_T_DYN)
return (ENODEV);
reg = rw->d.dyn.cfg_offset;
for (u_int i = 0; i < BHNDB_PCI_BARCTRL_WRITE_RETRY; i++) {
if ((error = bhndb_pci_fast_setregwin(dev, pci_dev, rw, addr)))
return (error);
if (pci_read_config(pci_dev, reg, 4) == addr)
return (0);
DELAY(10);
}
/* Unable to set window */
return (ENODEV);
}
