/*
* hub_pio_init - PIO-related hub initialization
*
* @hub: hubinfo structure for our hub
*/
void hub_pio_init(cnodeid_t cnode)
{
nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
unsigned i;
/* initialize big window piomaps for this hub */
bitmap_zero(hub_data(cnode)->h_bigwin_used, HUB_NUM_BIG_WINDOW);
for (i = 0; i < HUB_NUM_BIG_WINDOW; i++)
IIO_ITTE_DISABLE(nasid, i);
hub_set_piomode(nasid);
}
/*
* Setup pio structures needed for a particular hub.
*/
static void
hub_pio_init(devfs_handle_t hubv)
{
xwidgetnum_t widget;
hubinfo_t hubinfo;
nasid_t nasid;
int bigwin;
hub_piomap_t hub_piomap;
hubinfo_get(hubv, &hubinfo);
nasid = hubinfo->h_nasid;
/* Initialize small window piomaps for this hub */
for (widget=0; widget <= HUB_WIDGET_ID_MAX; widget++) {
hub_piomap = hubinfo_swin_piomap_get(hubinfo, (int)widget);
hub_piomap->hpio_xtalk_info.xp_target = widget;
hub_piomap->hpio_xtalk_info.xp_xtalk_addr = 0;
hub_piomap->hpio_xtalk_info.xp_mapsz = SWIN_SIZE;
hub_piomap->hpio_xtalk_info.xp_kvaddr = (caddr_t)NODE_SWIN_BASE(nasid, widget);
hub_piomap->hpio_hub = hubv;
hub_piomap->hpio_flags = HUB_PIOMAP_IS_VALID;
}
/* Initialize big window piomaps for this hub */
for (bigwin=0; bigwin < HUB_NUM_BIG_WINDOW; bigwin++) {
hub_piomap = hubinfo_bwin_piomap_get(hubinfo, bigwin);
hub_piomap->hpio_xtalk_info.xp_mapsz = BWIN_SIZE;
hub_piomap->hpio_hub = hubv;
hub_piomap->hpio_holdcnt = 0;
hub_piomap->hpio_flags = HUB_PIOMAP_IS_BIGWINDOW;
IIO_ITTE_DISABLE(nasid, bigwin);
}
#ifdef BRINGUP
hub_set_piomode(nasid, HUB_PIO_CONVEYOR);
#else
/* Set all the xwidgets in fire-and-forget mode
* by default
*/
hub_set_piomode(nasid, HUB_PIO_FIRE_N_FORGET);
#endif /* BRINGUP */
sv_init(&hubinfo->h_bwwait, SV_FIFO, "bigwin");
spinlock_init(&hubinfo->h_bwlock, "bigwin");
}
/*
* hub_piomap_free destroys a caddr_t-to-xtalk pio mapping and frees
* any associated mapping resources.
*
* If this * piomap was handled with a small window, or if it was handled
* in a big window that's still in use by someone else, then there's
* nothing to do. On the other hand, if this mapping was handled
* with a big window, AND if we were the final user of that mapping,
* then destroy the mapping.
*/
void
hub_piomap_free(hub_piomap_t hub_piomap)
{
devfs_handle_t hubv;
hubinfo_t hubinfo;
nasid_t nasid;
int s;
/*
* Small windows are permanently mapped to corresponding widgets,
* so there're no resources to free.
*/
if (!(hub_piomap->hpio_flags & HUB_PIOMAP_IS_BIGWINDOW))
return;
ASSERT(hub_piomap->hpio_flags & HUB_PIOMAP_IS_VALID);
ASSERT(hub_piomap->hpio_holdcnt > 0);
hubv = hub_piomap->hpio_hub;
hubinfo_get(hubv, &hubinfo);
nasid = hubinfo->h_nasid;
s = mutex_spinlock(&hubinfo->h_bwlock);
/*
* If this is the last hold on this mapping, free it.
*/
if (--hub_piomap->hpio_holdcnt == 0) {
IIO_ITTE_DISABLE(nasid, hub_piomap->hpio_bigwin_num );
if (hub_piomap->hpio_flags & HUB_PIOMAP_IS_FIXED) {
hub_piomap->hpio_flags &= ~(HUB_PIOMAP_IS_VALID | HUB_PIOMAP_IS_FIXED);
hubinfo->h_num_big_window_fixed--;
ASSERT(hubinfo->h_num_big_window_fixed >= 0);
} else
hub_piomap->hpio_flags &= ~HUB_PIOMAP_IS_VALID;
(void)sv_signal(&hubinfo->h_bwwait);
}
mutex_spinunlock(&hubinfo->h_bwlock, s);
}
