/*
* Return the pfn of the last free page of memory on a node.
*/
pfn_t node_getmaxclick(cnodeid_t node)
{
pfn_t slot_psize;
int slot;
/*
* Start at the top slot. When we find a slot with memory in it,
* that's the winner.
*/
for (slot = (node_getnumslots(node) - 1); slot >= 0; slot--) {
if ((slot_psize = slot_getsize(node, slot))) {
if (slot_psize == SLOT_IGNORED)
continue;
/* Return the basepfn + the slot size, minus 1. */
return slot_getbasepfn(node, slot) + slot_psize - 1;
}
}
/*
* If there's no memory on the node, return 0. This is likely
* to cause problems.
*/
return (pfn_t)0;
}
/* ARGSUSED */
int
mem_refcnt_ioctl(devfs_handle_t dev,
int cmd,
void *arg,
int mode,
cred_t *cred_p,
int *rvalp)
{
cnodeid_t node;
int errcode;
extern int numnodes;
ASSERT( (hubspc_subdevice_t)(ulong)device_info_get(dev) == HUBSPC_REFCOUNTERS );
node = master_node_get(dev);
ASSERT( (node >= 0) && (node < numnodes) );
ASSERT( NODEPDA(node)->migr_refcnt_counterbuffer != NULL);
ASSERT( NODEPDA(node)->migr_refcnt_counterbase != NULL );
ASSERT( NODEPDA(node)->migr_refcnt_cbsize != 0 );
errcode = 0;
switch (cmd) {
case RCB_INFO_GET:
{
rcb_info_t rcb;
rcb.rcb_len = NODEPDA(node)->migr_refcnt_cbsize;
rcb.rcb_sw_sets = NODEPDA(node)->migr_refcnt_numsets;
rcb.rcb_sw_counters_per_set = numnodes;
rcb.rcb_sw_counter_size = sizeof(refcnt_t);
rcb.rcb_base_pages = NODEPDA(node)->migr_refcnt_numsets /
NUM_OF_HW_PAGES_PER_SW_PAGE();
rcb.rcb_base_page_size = NBPP;
rcb.rcb_base_paddr = ctob(slot_getbasepfn(node, 0));
rcb.rcb_cnodeid = node;
rcb.rcb_granularity = MD_PAGE_SIZE;
#ifdef notyet
rcb.rcb_hw_counter_max = MIGR_COUNTER_MAX_GET(node);
rcb.rcb_diff_threshold = MIGR_THRESHOLD_DIFF_GET(node);
#endif
rcb.rcb_abs_threshold = MIGR_THRESHOLD_ABS_GET(node);
rcb.rcb_num_slots = node_getnumslots(node);
if (COPYOUT(&rcb, arg, sizeof(rcb_info_t))) {
errcode = EFAULT;
}
break;
}
case RCB_SLOT_GET:
{
rcb_slot_t slot[MAX_MEM_SLOTS];
int s;
int nslots;
nslots = node_getnumslots(node);
ASSERT(nslots <= MAX_MEM_SLOTS);
for (s = 0; s < nslots; s++) {
slot[s].base = (uint64_t)ctob(slot_getbasepfn(node, s));
#ifdef notyet
slot[s].size = (uint64_t)ctob(slot_getsize(node, s));
#else
slot[s].size = (uint64_t)1;
#endif
}
if (COPYOUT(&slot[0], arg, nslots * sizeof(rcb_slot_t))) {
errcode = EFAULT;
}
*rvalp = nslots;
break;
}
default:
errcode = EINVAL;
break;
}
return errcode;
}
