Differential D22559 Diff 64896 sys/x86/iommu/intel_gas.c

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sys/x86/iommu/intel_gas.c

Show First 20 Lines • Show All 537 Lines • ▼ Show 20 Lines	dmar_gas_alloc_region(struct dmar_domain domain, struct dmar_map_entry entry,
* entries.		* entries.
*		*
* XXXKIB: this does not handle a case when prev or next		* XXXKIB: this does not handle a case when prev or next
* entries are completely covered by the current one, which		* entries are completely covered by the current one, which
* extends both ways.		* extends both ways.
*/		*/
if (prev != NULL && prev->end > entry->start &&		if (prev != NULL && prev->end > entry->start &&
(prev->flags & DMAR_MAP_ENTRY_PLACE) == 0) {		(prev->flags & DMAR_MAP_ENTRY_PLACE) == 0) {
if ((prev->flags & DMAR_MAP_ENTRY_RMRR) == 0)		if ((flags & DMAR_GM_RMRR) == 0 \|\|
		(prev->flags & DMAR_MAP_ENTRY_RMRR) == 0)
return (EBUSY);		return (EBUSY);
entry->start = prev->end;		entry->start = prev->end;
}		}
if (next->start < entry->end &&		if (next->start < entry->end &&
(next->flags & DMAR_MAP_ENTRY_PLACE) == 0) {		(next->flags & DMAR_MAP_ENTRY_PLACE) == 0) {
if ((next->flags & DMAR_MAP_ENTRY_RMRR) == 0)		if ((flags & DMAR_GM_RMRR) == 0 \|\|
		(next->flags & DMAR_MAP_ENTRY_RMRR) == 0)
return (EBUSY);		return (EBUSY);
entry->end = next->start;		entry->end = next->start;
}		}
if (entry->end == entry->start)		if (entry->end == entry->start)
return (0);		return (0);

if (prev != NULL && prev->end > entry->start) {		if (prev != NULL && prev->end > entry->start) {
/* This assumes that prev is the placeholder entry. */		/* This assumes that prev is the placeholder entry. */
dmar_gas_rb_remove(domain, prev);		dmar_gas_rb_remove(domain, prev);
prev = NULL;		prev = NULL;
}		}
if (next->start < entry->end) {		if (next->start < entry->end) {
dmar_gas_rb_remove(domain, next);		dmar_gas_rb_remove(domain, next);
next = NULL;		next = NULL;
}		}

found = dmar_gas_rb_insert(domain, entry);		found = dmar_gas_rb_insert(domain, entry);
KASSERT(found, ("found RMRR dup %p start %jx end %jx",		KASSERT(found, ("found RMRR dup %p start %jx end %jx",
domain, (uintmax_t)entry->start, (uintmax_t)entry->end));		domain, (uintmax_t)entry->start, (uintmax_t)entry->end));
		if ((flags & DMAR_GM_RMRR) != 0)
entry->flags = DMAR_MAP_ENTRY_RMRR;		entry->flags = DMAR_MAP_ENTRY_RMRR;

#ifdef INVARIANTS		#ifdef INVARIANTS
struct dmar_map_entry ip, in;		struct dmar_map_entry ip, in;
ip = RB_PREV(dmar_gas_entries_tree, &domain->rb_root, entry);		ip = RB_PREV(dmar_gas_entries_tree, &domain->rb_root, entry);
in = RB_NEXT(dmar_gas_entries_tree, &domain->rb_root, entry);		in = RB_NEXT(dmar_gas_entries_tree, &domain->rb_root, entry);
KASSERT(prev == NULL \|\| ip == prev,		KASSERT(prev == NULL \|\| ip == prev,
("RMRR %p (%jx %jx) prev %p (%jx %jx) ins prev %p (%jx %jx)",		("RMRR %p (%jx %jx) prev %p (%jx %jx) ins prev %p (%jx %jx)",
entry, entry->start, entry->end, prev,		entry, entry->start, entry->end, prev,
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dmar_gas_map_region(struct dmar_domain domain, struct dmar_map_entry entry,		dmar_gas_map_region(struct dmar_domain domain, struct dmar_map_entry entry,
u_int eflags, u_int flags, vm_page_t *ma)		u_int eflags, u_int flags, vm_page_t *ma)
{		{
dmar_gaddr_t start;		dmar_gaddr_t start;
int error;		int error;

KASSERT(entry->flags == 0, ("used RMRR entry %p %p %x", domain,		KASSERT(entry->flags == 0, ("used RMRR entry %p %p %x", domain,
entry, entry->flags));		entry, entry->flags));
KASSERT((flags & ~(DMAR_GM_CANWAIT)) == 0,		KASSERT((flags & ~(DMAR_GM_CANWAIT \| DMAR_GM_RMRR)) == 0,
("invalid flags 0x%x", flags));		("invalid flags 0x%x", flags));

start = entry->start;		start = entry->start;
DMAR_DOMAIN_LOCK(domain);		DMAR_DOMAIN_LOCK(domain);
error = dmar_gas_alloc_region(domain, entry, flags);		error = dmar_gas_alloc_region(domain, entry, flags);
if (error != 0) {		if (error != 0) {
DMAR_DOMAIN_UNLOCK(domain);		DMAR_DOMAIN_UNLOCK(domain);
return (error);		return (error);
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