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head/sys/x86/iommu/intel_gas.c

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#include <x86/iommu/busdma_dmar.h> #include <x86/iommu/busdma_dmar.h>
#include <dev/pci/pcireg.h> #include <dev/pci/pcireg.h>
#include <x86/iommu/intel_dmar.h> #include <x86/iommu/intel_dmar.h>
/* /*
* Guest Address Space management. * Guest Address Space management.
*/ */
static uma_zone_t dmar_map_entry_zone; static uma_zone_t iommu_map_entry_zone;
static void static void
intel_gas_init(void) intel_gas_init(void)
{ {
dmar_map_entry_zone = uma_zcreate("DMAR_MAP_ENTRY", iommu_map_entry_zone = uma_zcreate("IOMMU_MAP_ENTRY",
sizeof(struct dmar_map_entry), NULL, NULL, sizeof(struct iommu_map_entry), NULL, NULL,
NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NODUMP); NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NODUMP);
} }
SYSINIT(intel_gas, SI_SUB_DRIVERS, SI_ORDER_FIRST, intel_gas_init, NULL); SYSINIT(intel_gas, SI_SUB_DRIVERS, SI_ORDER_FIRST, intel_gas_init, NULL);
struct dmar_map_entry * struct iommu_map_entry *
dmar_gas_alloc_entry(struct dmar_domain *domain, u_int flags) dmar_gas_alloc_entry(struct dmar_domain *domain, u_int flags)
{ {
struct dmar_map_entry *res; struct iommu_map_entry *res;
KASSERT((flags & ~(DMAR_PGF_WAITOK)) == 0, KASSERT((flags & ~(DMAR_PGF_WAITOK)) == 0,
("unsupported flags %x", flags)); ("unsupported flags %x", flags));
res = uma_zalloc(dmar_map_entry_zone, ((flags & DMAR_PGF_WAITOK) != res = uma_zalloc(iommu_map_entry_zone, ((flags & DMAR_PGF_WAITOK) !=
0 ? M_WAITOK : M_NOWAIT) | M_ZERO); 0 ? M_WAITOK : M_NOWAIT) | M_ZERO);
if (res != NULL) { if (res != NULL) {
res->domain = domain; res->domain = (struct iommu_domain *)domain;
atomic_add_int(&domain->entries_cnt, 1); atomic_add_int(&domain->entries_cnt, 1);
} }
return (res); return (res);
} }
void void
dmar_gas_free_entry(struct dmar_domain *domain, struct dmar_map_entry *entry) dmar_gas_free_entry(struct dmar_domain *domain, struct iommu_map_entry *entry)
{ {
KASSERT(domain == entry->domain, KASSERT(domain == (struct dmar_domain *)entry->domain,
("mismatched free domain %p entry %p entry->domain %p", domain, ("mismatched free domain %p entry %p entry->domain %p", domain,
entry, entry->domain)); entry, entry->domain));
atomic_subtract_int(&domain->entries_cnt, 1); atomic_subtract_int(&domain->entries_cnt, 1);
uma_zfree(dmar_map_entry_zone, entry); uma_zfree(iommu_map_entry_zone, entry);
} }
static int static int
dmar_gas_cmp_entries(struct dmar_map_entry *a, struct dmar_map_entry *b) dmar_gas_cmp_entries(struct iommu_map_entry *a, struct iommu_map_entry *b)
{ {
/* Last entry have zero size, so <= */ /* Last entry have zero size, so <= */
KASSERT(a->start <= a->end, ("inverted entry %p (%jx, %jx)", KASSERT(a->start <= a->end, ("inverted entry %p (%jx, %jx)",
a, (uintmax_t)a->start, (uintmax_t)a->end)); a, (uintmax_t)a->start, (uintmax_t)a->end));
KASSERT(b->start <= b->end, ("inverted entry %p (%jx, %jx)", KASSERT(b->start <= b->end, ("inverted entry %p (%jx, %jx)",
b, (uintmax_t)b->start, (uintmax_t)b->end)); b, (uintmax_t)b->start, (uintmax_t)b->end));
KASSERT(a->end <= b->start || b->end <= a->start || KASSERT(a->end <= b->start || b->end <= a->start ||
a->end == a->start || b->end == b->start, a->end == a->start || b->end == b->start,
("overlapping entries %p (%jx, %jx) %p (%jx, %jx)", ("overlapping entries %p (%jx, %jx) %p (%jx, %jx)",
a, (uintmax_t)a->start, (uintmax_t)a->end, a, (uintmax_t)a->start, (uintmax_t)a->end,
b, (uintmax_t)b->start, (uintmax_t)b->end)); b, (uintmax_t)b->start, (uintmax_t)b->end));
if (a->end < b->end) if (a->end < b->end)
return (-1); return (-1);
else if (b->end < a->end) else if (b->end < a->end)
return (1); return (1);
return (0); return (0);
} }
static void static void
dmar_gas_augment_entry(struct dmar_map_entry *entry) dmar_gas_augment_entry(struct iommu_map_entry *entry)
{ {
struct dmar_map_entry *child; struct iommu_map_entry *child;
dmar_gaddr_t free_down; iommu_gaddr_t free_down;
free_down = 0; free_down = 0;
if ((child = RB_LEFT(entry, rb_entry)) != NULL) { if ((child = RB_LEFT(entry, rb_entry)) != NULL) {
free_down = MAX(free_down, child->free_down); free_down = MAX(free_down, child->free_down);
free_down = MAX(free_down, entry->start - child->last); free_down = MAX(free_down, entry->start - child->last);
entry->first = child->first; entry->first = child->first;
} else } else
entry->first = entry->start; entry->first = entry->start;
if ((child = RB_RIGHT(entry, rb_entry)) != NULL) { if ((child = RB_RIGHT(entry, rb_entry)) != NULL) {
free_down = MAX(free_down, child->free_down); free_down = MAX(free_down, child->free_down);
free_down = MAX(free_down, child->first - entry->end); free_down = MAX(free_down, child->first - entry->end);
entry->last = child->last; entry->last = child->last;
} else } else
entry->last = entry->end; entry->last = entry->end;
entry->free_down = free_down; entry->free_down = free_down;
} }
RB_GENERATE(dmar_gas_entries_tree, dmar_map_entry, rb_entry, RB_GENERATE(dmar_gas_entries_tree, iommu_map_entry, rb_entry,
dmar_gas_cmp_entries); dmar_gas_cmp_entries);
#ifdef INVARIANTS #ifdef INVARIANTS
static void static void
dmar_gas_check_free(struct dmar_domain *domain) dmar_gas_check_free(struct dmar_domain *domain)
{ {
struct dmar_map_entry *entry, *l, *r; struct iommu_map_entry *entry, *l, *r;
dmar_gaddr_t v; iommu_gaddr_t v;
RB_FOREACH(entry, dmar_gas_entries_tree, &domain->rb_root) { RB_FOREACH(entry, dmar_gas_entries_tree, &domain->rb_root) {
KASSERT(domain == entry->domain, KASSERT(domain == (struct dmar_domain *)entry->domain,
("mismatched free domain %p entry %p entry->domain %p", ("mismatched free domain %p entry %p entry->domain %p",
domain, entry, entry->domain)); domain, entry, entry->domain));
l = RB_LEFT(entry, rb_entry); l = RB_LEFT(entry, rb_entry);
r = RB_RIGHT(entry, rb_entry); r = RB_RIGHT(entry, rb_entry);
v = 0; v = 0;
if (l != NULL) { if (l != NULL) {
v = MAX(v, l->free_down); v = MAX(v, l->free_down);
v = MAX(v, entry->start - l->last); v = MAX(v, entry->start - l->last);
} }
if (r != NULL) { if (r != NULL) {
v = MAX(v, r->free_down); v = MAX(v, r->free_down);
v = MAX(v, r->first - entry->end); v = MAX(v, r->first - entry->end);
} }
MPASS(entry->free_down == v); MPASS(entry->free_down == v);
} }
} }
#endif #endif
static bool static bool
dmar_gas_rb_insert(struct dmar_domain *domain, struct dmar_map_entry *entry) dmar_gas_rb_insert(struct dmar_domain *domain, struct iommu_map_entry *entry)
{ {
struct dmar_map_entry *found; struct iommu_map_entry *found;
found = RB_INSERT(dmar_gas_entries_tree, &domain->rb_root, entry); found = RB_INSERT(dmar_gas_entries_tree, &domain->rb_root, entry);
return (found == NULL); return (found == NULL);
} }
static void static void
dmar_gas_rb_remove(struct dmar_domain *domain, struct dmar_map_entry *entry) dmar_gas_rb_remove(struct dmar_domain *domain, struct iommu_map_entry *entry)
{ {
RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry); RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry);
} }
void void
dmar_gas_init_domain(struct dmar_domain *domain) dmar_gas_init_domain(struct dmar_domain *domain)
{ {
struct dmar_map_entry *begin, *end; struct iommu_map_entry *begin, *end;
begin = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK); begin = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK);
end = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK); end = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK);
DMAR_DOMAIN_LOCK(domain); DMAR_DOMAIN_LOCK(domain);
KASSERT(domain->entries_cnt == 2, ("dirty domain %p", domain)); KASSERT(domain->entries_cnt == 2, ("dirty domain %p", domain));
KASSERT(RB_EMPTY(&domain->rb_root), ("non-empty entries %p", domain)); KASSERT(RB_EMPTY(&domain->rb_root), ("non-empty entries %p", domain));
begin->start = 0; begin->start = 0;
begin->end = DMAR_PAGE_SIZE; begin->end = DMAR_PAGE_SIZE;
begin->flags = DMAR_MAP_ENTRY_PLACE | DMAR_MAP_ENTRY_UNMAPPED; begin->flags = IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_UNMAPPED;
dmar_gas_rb_insert(domain, begin); dmar_gas_rb_insert(domain, begin);
end->start = domain->end; end->start = domain->end;
end->end = domain->end; end->end = domain->end;
end->flags = DMAR_MAP_ENTRY_PLACE | DMAR_MAP_ENTRY_UNMAPPED; end->flags = IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_UNMAPPED;
dmar_gas_rb_insert(domain, end); dmar_gas_rb_insert(domain, end);
domain->first_place = begin; domain->first_place = begin;
domain->last_place = end; domain->last_place = end;
domain->flags |= DMAR_DOMAIN_GAS_INITED; domain->flags |= DMAR_DOMAIN_GAS_INITED;
DMAR_DOMAIN_UNLOCK(domain); DMAR_DOMAIN_UNLOCK(domain);
} }
void void
dmar_gas_fini_domain(struct dmar_domain *domain) dmar_gas_fini_domain(struct dmar_domain *domain)
{ {
struct dmar_map_entry *entry, *entry1; struct iommu_map_entry *entry, *entry1;
DMAR_DOMAIN_ASSERT_LOCKED(domain); DMAR_DOMAIN_ASSERT_LOCKED(domain);
KASSERT(domain->entries_cnt == 2, ("domain still in use %p", domain)); KASSERT(domain->entries_cnt == 2, ("domain still in use %p", domain));
entry = RB_MIN(dmar_gas_entries_tree, &domain->rb_root); entry = RB_MIN(dmar_gas_entries_tree, &domain->rb_root);
KASSERT(entry->start == 0, ("start entry start %p", domain)); KASSERT(entry->start == 0, ("start entry start %p", domain));
KASSERT(entry->end == DMAR_PAGE_SIZE, ("start entry end %p", domain)); KASSERT(entry->end == DMAR_PAGE_SIZE, ("start entry end %p", domain));
KASSERT(entry->flags == DMAR_MAP_ENTRY_PLACE, KASSERT(entry->flags == IOMMU_MAP_ENTRY_PLACE,
("start entry flags %p", domain)); ("start entry flags %p", domain));
RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry); RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry);
dmar_gas_free_entry(domain, entry); dmar_gas_free_entry(domain, entry);
entry = RB_MAX(dmar_gas_entries_tree, &domain->rb_root); entry = RB_MAX(dmar_gas_entries_tree, &domain->rb_root);
KASSERT(entry->start == domain->end, ("end entry start %p", domain)); KASSERT(entry->start == domain->end, ("end entry start %p", domain));
KASSERT(entry->end == domain->end, ("end entry end %p", domain)); KASSERT(entry->end == domain->end, ("end entry end %p", domain));
KASSERT(entry->flags == DMAR_MAP_ENTRY_PLACE, KASSERT(entry->flags == IOMMU_MAP_ENTRY_PLACE,
("end entry flags %p", domain)); ("end entry flags %p", domain));
RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry); RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry);
dmar_gas_free_entry(domain, entry); dmar_gas_free_entry(domain, entry);
RB_FOREACH_SAFE(entry, dmar_gas_entries_tree, &domain->rb_root, RB_FOREACH_SAFE(entry, dmar_gas_entries_tree, &domain->rb_root,
entry1) { entry1) {
KASSERT((entry->flags & DMAR_MAP_ENTRY_RMRR) != 0, KASSERT((entry->flags & IOMMU_MAP_ENTRY_RMRR) != 0,
("non-RMRR entry left %p", domain)); ("non-RMRR entry left %p", domain));
RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry); RB_REMOVE(dmar_gas_entries_tree, &domain->rb_root, entry);
dmar_gas_free_entry(domain, entry); dmar_gas_free_entry(domain, entry);
} }
} }
struct dmar_gas_match_args { struct dmar_gas_match_args {
struct dmar_domain *domain; struct dmar_domain *domain;
dmar_gaddr_t size; iommu_gaddr_t size;
int offset; int offset;
const struct bus_dma_tag_common *common; const struct bus_dma_tag_common *common;
u_int gas_flags; u_int gas_flags;
struct dmar_map_entry *entry; struct iommu_map_entry *entry;
}; };
/* /*
* The interval [beg, end) is a free interval between two dmar_map_entries. * The interval [beg, end) is a free interval between two dmar_map_entries.
* maxaddr is an upper bound on addresses that can be allocated. Try to * maxaddr is an upper bound on addresses that can be allocated. Try to
* allocate space in the free interval, subject to the conditions expressed * allocate space in the free interval, subject to the conditions expressed
* by a, and return 'true' if and only if the allocation attempt succeeds. * by a, and return 'true' if and only if the allocation attempt succeeds.
*/ */
static bool static bool
dmar_gas_match_one(struct dmar_gas_match_args *a, dmar_gaddr_t beg, dmar_gas_match_one(struct dmar_gas_match_args *a, iommu_gaddr_t beg,
dmar_gaddr_t end, dmar_gaddr_t maxaddr) iommu_gaddr_t end, iommu_gaddr_t maxaddr)
{ {
dmar_gaddr_t bs, start; iommu_gaddr_t bs, start;
a->entry->start = roundup2(beg + DMAR_PAGE_SIZE, a->entry->start = roundup2(beg + DMAR_PAGE_SIZE,
a->common->alignment); a->common->alignment);
if (a->entry->start + a->size > maxaddr) if (a->entry->start + a->size > maxaddr)
return (false); return (false);
/* DMAR_PAGE_SIZE to create gap after new entry. */ /* DMAR_PAGE_SIZE to create gap after new entry. */
if (a->entry->start < beg + DMAR_PAGE_SIZE || if (a->entry->start < beg + DMAR_PAGE_SIZE ||
a->entry->start + a->size + a->offset + DMAR_PAGE_SIZE > end) a->entry->start + a->size + a->offset + DMAR_PAGE_SIZE > end)
return (false); return (false);
/* No boundary crossing. */ /* No boundary crossing. */
if (dmar_test_boundary(a->entry->start + a->offset, a->size, if (iommu_test_boundary(a->entry->start + a->offset, a->size,
a->common->boundary)) a->common->boundary))
return (true); return (true);
/* /*
* The start + offset to start + offset + size region crosses * The start + offset to start + offset + size region crosses
* the boundary. Check if there is enough space after the * the boundary. Check if there is enough space after the
* next boundary after the beg. * next boundary after the beg.
*/ */
bs = rounddown2(a->entry->start + a->offset + a->common->boundary, bs = rounddown2(a->entry->start + a->offset + a->common->boundary,
a->common->boundary); a->common->boundary);
start = roundup2(bs, a->common->alignment); start = roundup2(bs, a->common->alignment);
/* DMAR_PAGE_SIZE to create gap after new entry. */ /* DMAR_PAGE_SIZE to create gap after new entry. */
if (start + a->offset + a->size + DMAR_PAGE_SIZE <= end && if (start + a->offset + a->size + DMAR_PAGE_SIZE <= end &&
start + a->offset + a->size <= maxaddr && start + a->offset + a->size <= maxaddr &&
dmar_test_boundary(start + a->offset, a->size, iommu_test_boundary(start + a->offset, a->size,
a->common->boundary)) { a->common->boundary)) {
a->entry->start = start; a->entry->start = start;
return (true); return (true);
} }
/* /*
* Not enough space to align at the requested boundary, or * Not enough space to align at the requested boundary, or
* boundary is smaller than the size, but allowed to split. * boundary is smaller than the size, but allowed to split.
* We already checked that start + size does not overlap maxaddr. * We already checked that start + size does not overlap maxaddr.
* *
* XXXKIB. It is possible that bs is exactly at the start of * XXXKIB. It is possible that bs is exactly at the start of
* the next entry, then we do not have gap. Ignore for now. * the next entry, then we do not have gap. Ignore for now.
*/ */
if ((a->gas_flags & DMAR_GM_CANSPLIT) != 0) { if ((a->gas_flags & IOMMU_MF_CANSPLIT) != 0) {
a->size = bs - a->entry->start; a->size = bs - a->entry->start;
return (true); return (true);
} }
return (false); return (false);
} }
static void static void
Show All 9 Linesdmar_gas_match_insert(struct dmar_gas_match_args *a)
* The page sized gap is created between consequent * The page sized gap is created between consequent
* allocations to ensure that out-of-bounds accesses fault. * allocations to ensure that out-of-bounds accesses fault.
*/ */
a->entry->end = a->entry->start + a->size; a->entry->end = a->entry->start + a->size;
found = dmar_gas_rb_insert(a->domain, a->entry); found = dmar_gas_rb_insert(a->domain, a->entry);
KASSERT(found, ("found dup %p start %jx size %jx", KASSERT(found, ("found dup %p start %jx size %jx",
a->domain, (uintmax_t)a->entry->start, (uintmax_t)a->size)); a->domain, (uintmax_t)a->entry->start, (uintmax_t)a->size));
a->entry->flags = DMAR_MAP_ENTRY_MAP; a->entry->flags = IOMMU_MAP_ENTRY_MAP;
} }
static int static int
dmar_gas_lowermatch(struct dmar_gas_match_args *a, struct dmar_map_entry *entry) dmar_gas_lowermatch(struct dmar_gas_match_args *a, struct iommu_map_entry *entry)
{ {
struct dmar_map_entry *child; struct iommu_map_entry *child;
child = RB_RIGHT(entry, rb_entry); child = RB_RIGHT(entry, rb_entry);
if (child != NULL && entry->end < a->common->lowaddr && if (child != NULL && entry->end < a->common->lowaddr &&
dmar_gas_match_one(a, entry->end, child->first, dmar_gas_match_one(a, entry->end, child->first,
a->common->lowaddr)) { a->common->lowaddr)) {
dmar_gas_match_insert(a); dmar_gas_match_insert(a);
return (0); return (0);
} }
Show All 12 Linesdmar_gas_lowermatch(struct dmar_gas_match_args *a, struct iommu_map_entry *entry)
} }
child = RB_RIGHT(entry, rb_entry); child = RB_RIGHT(entry, rb_entry);
if (child != NULL && 0 == dmar_gas_lowermatch(a, child)) if (child != NULL && 0 == dmar_gas_lowermatch(a, child))
return (0); return (0);
return (ENOMEM); return (ENOMEM);
} }
static int static int
dmar_gas_uppermatch(struct dmar_gas_match_args *a, struct dmar_map_entry *entry) dmar_gas_uppermatch(struct dmar_gas_match_args *a, struct iommu_map_entry *entry)
{ {
struct dmar_map_entry *child; struct iommu_map_entry *child;
if (entry->free_down < a->size + a->offset + DMAR_PAGE_SIZE) if (entry->free_down < a->size + a->offset + DMAR_PAGE_SIZE)
return (ENOMEM); return (ENOMEM);
if (entry->last < a->common->highaddr) if (entry->last < a->common->highaddr)
return (ENOMEM); return (ENOMEM);
child = RB_LEFT(entry, rb_entry); child = RB_LEFT(entry, rb_entry);
if (child != NULL && 0 == dmar_gas_uppermatch(a, child)) if (child != NULL && 0 == dmar_gas_uppermatch(a, child))
return (0); return (0);
Show All 12 Linesdmar_gas_uppermatch(struct dmar_gas_match_args *a, struct iommu_map_entry *entry)
} }
if (child != NULL && 0 == dmar_gas_uppermatch(a, child)) if (child != NULL && 0 == dmar_gas_uppermatch(a, child))
return (0); return (0);
return (ENOMEM); return (ENOMEM);
} }
static int static int
dmar_gas_find_space(struct dmar_domain *domain, dmar_gas_find_space(struct dmar_domain *domain,
const struct bus_dma_tag_common *common, dmar_gaddr_t size, const struct bus_dma_tag_common *common, iommu_gaddr_t size,
int offset, u_int flags, struct dmar_map_entry *entry) int offset, u_int flags, struct iommu_map_entry *entry)
{ {
struct dmar_gas_match_args a; struct dmar_gas_match_args a;
int error; int error;
DMAR_DOMAIN_ASSERT_LOCKED(domain); DMAR_DOMAIN_ASSERT_LOCKED(domain);
KASSERT(entry->flags == 0, ("dirty entry %p %p", domain, entry)); KASSERT(entry->flags == 0, ("dirty entry %p %p", domain, entry));
KASSERT((size & DMAR_PAGE_MASK) == 0, ("size %jx", (uintmax_t)size)); KASSERT((size & DMAR_PAGE_MASK) == 0, ("size %jx", (uintmax_t)size));
Show All 17 Lines if (common->highaddr >= domain->end)
return (ENOMEM); return (ENOMEM);
error = dmar_gas_uppermatch(&a, RB_ROOT(&domain->rb_root)); error = dmar_gas_uppermatch(&a, RB_ROOT(&domain->rb_root));
KASSERT(error == ENOMEM, KASSERT(error == ENOMEM,
("error %d from dmar_gas_uppermatch", error)); ("error %d from dmar_gas_uppermatch", error));
return (error); return (error);
} }
static int static int
dmar_gas_alloc_region(struct dmar_domain *domain, struct dmar_map_entry *entry, dmar_gas_alloc_region(struct dmar_domain *domain, struct iommu_map_entry *entry,
u_int flags) u_int flags)
{ {
struct dmar_map_entry *next, *prev; struct iommu_map_entry *next, *prev;
bool found; bool found;
DMAR_DOMAIN_ASSERT_LOCKED(domain); DMAR_DOMAIN_ASSERT_LOCKED(domain);
if ((entry->start & DMAR_PAGE_MASK) != 0 || if ((entry->start & DMAR_PAGE_MASK) != 0 ||
(entry->end & DMAR_PAGE_MASK) != 0) (entry->end & DMAR_PAGE_MASK) != 0)
return (EINVAL); return (EINVAL);
if (entry->start >= entry->end) if (entry->start >= entry->end)
Show All 11 Linesdmar_gas_alloc_region(struct dmar_domain *domain, struct iommu_map_entry *entry,
* Adapt to broken BIOSes which specify overlapping RMRR * Adapt to broken BIOSes which specify overlapping RMRR
* 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 & IOMMU_MAP_ENTRY_PLACE) == 0) {
if ((flags & DMAR_GM_RMRR) == 0 || if ((flags & IOMMU_MF_RMRR) == 0 ||
(prev->flags & DMAR_MAP_ENTRY_RMRR) == 0) (prev->flags & IOMMU_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 & IOMMU_MAP_ENTRY_PLACE) == 0) {
if ((flags & DMAR_GM_RMRR) == 0 || if ((flags & IOMMU_MF_RMRR) == 0 ||
(next->flags & DMAR_MAP_ENTRY_RMRR) == 0) (next->flags & IOMMU_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) if ((flags & IOMMU_MF_RMRR) != 0)
entry->flags = DMAR_MAP_ENTRY_RMRR; entry->flags = IOMMU_MAP_ENTRY_RMRR;
#ifdef INVARIANTS #ifdef INVARIANTS
struct dmar_map_entry *ip, *in; struct iommu_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,
prev == NULL ? 0 : prev->start, prev == NULL ? 0 : prev->end, prev == NULL ? 0 : prev->start, prev == NULL ? 0 : prev->end,
ip, ip == NULL ? 0 : ip->start, ip == NULL ? 0 : ip->end)); ip, ip == NULL ? 0 : ip->start, ip == NULL ? 0 : ip->end));
KASSERT(next == NULL || in == next, KASSERT(next == NULL || in == next,
("RMRR %p (%jx %jx) next %p (%jx %jx) ins next %p (%jx %jx)", ("RMRR %p (%jx %jx) next %p (%jx %jx) ins next %p (%jx %jx)",
entry, entry->start, entry->end, next, entry, entry->start, entry->end, next,
next == NULL ? 0 : next->start, next == NULL ? 0 : next->end, next == NULL ? 0 : next->start, next == NULL ? 0 : next->end,
in, in == NULL ? 0 : in->start, in == NULL ? 0 : in->end)); in, in == NULL ? 0 : in->start, in == NULL ? 0 : in->end));
#endif #endif
return (0); return (0);
} }
void void
dmar_gas_free_space(struct dmar_domain *domain, struct dmar_map_entry *entry) dmar_gas_free_space(struct dmar_domain *domain, struct iommu_map_entry *entry)
{ {
DMAR_DOMAIN_ASSERT_LOCKED(domain); DMAR_DOMAIN_ASSERT_LOCKED(domain);
KASSERT((entry->flags & (DMAR_MAP_ENTRY_PLACE | DMAR_MAP_ENTRY_RMRR | KASSERT((entry->flags & (IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_RMRR |
DMAR_MAP_ENTRY_MAP)) == DMAR_MAP_ENTRY_MAP, IOMMU_MAP_ENTRY_MAP)) == IOMMU_MAP_ENTRY_MAP,
("permanent entry %p %p", domain, entry)); ("permanent entry %p %p", domain, entry));
dmar_gas_rb_remove(domain, entry); dmar_gas_rb_remove(domain, entry);
entry->flags &= ~DMAR_MAP_ENTRY_MAP; entry->flags &= ~IOMMU_MAP_ENTRY_MAP;
#ifdef INVARIANTS #ifdef INVARIANTS
if (dmar_check_free) if (dmar_check_free)
dmar_gas_check_free(domain); dmar_gas_check_free(domain);
#endif #endif
} }
void void
dmar_gas_free_region(struct dmar_domain *domain, struct dmar_map_entry *entry) dmar_gas_free_region(struct dmar_domain *domain, struct iommu_map_entry *entry)
{ {
struct dmar_map_entry *next, *prev; struct iommu_map_entry *next, *prev;
DMAR_DOMAIN_ASSERT_LOCKED(domain); DMAR_DOMAIN_ASSERT_LOCKED(domain);
KASSERT((entry->flags & (DMAR_MAP_ENTRY_PLACE | DMAR_MAP_ENTRY_RMRR | KASSERT((entry->flags & (IOMMU_MAP_ENTRY_PLACE | IOMMU_MAP_ENTRY_RMRR |
DMAR_MAP_ENTRY_MAP)) == DMAR_MAP_ENTRY_RMRR, IOMMU_MAP_ENTRY_MAP)) == IOMMU_MAP_ENTRY_RMRR,
("non-RMRR entry %p %p", domain, entry)); ("non-RMRR entry %p %p", domain, entry));
prev = RB_PREV(dmar_gas_entries_tree, &domain->rb_root, entry); prev = RB_PREV(dmar_gas_entries_tree, &domain->rb_root, entry);
next = RB_NEXT(dmar_gas_entries_tree, &domain->rb_root, entry); next = RB_NEXT(dmar_gas_entries_tree, &domain->rb_root, entry);
dmar_gas_rb_remove(domain, entry); dmar_gas_rb_remove(domain, entry);
entry->flags &= ~DMAR_MAP_ENTRY_RMRR; entry->flags &= ~IOMMU_MAP_ENTRY_RMRR;
if (prev == NULL) if (prev == NULL)
dmar_gas_rb_insert(domain, domain->first_place); dmar_gas_rb_insert(domain, domain->first_place);
if (next == NULL) if (next == NULL)
dmar_gas_rb_insert(domain, domain->last_place); dmar_gas_rb_insert(domain, domain->last_place);
} }
int int
dmar_gas_map(struct dmar_domain *domain, dmar_gas_map(struct dmar_domain *domain,
const struct bus_dma_tag_common *common, dmar_gaddr_t size, int offset, const struct bus_dma_tag_common *common, iommu_gaddr_t size, int offset,
u_int eflags, u_int flags, vm_page_t *ma, struct dmar_map_entry **res) u_int eflags, u_int flags, vm_page_t *ma, struct iommu_map_entry **res)
{ {
struct dmar_map_entry *entry; struct iommu_map_entry *entry;
int error; int error;
KASSERT((flags & ~(DMAR_GM_CANWAIT | DMAR_GM_CANSPLIT)) == 0, KASSERT((flags & ~(IOMMU_MF_CANWAIT | IOMMU_MF_CANSPLIT)) == 0,
("invalid flags 0x%x", flags)); ("invalid flags 0x%x", flags));
entry = dmar_gas_alloc_entry(domain, (flags & DMAR_GM_CANWAIT) != 0 ? entry = dmar_gas_alloc_entry(domain,
DMAR_PGF_WAITOK : 0); (flags & IOMMU_MF_CANWAIT) != 0 ? DMAR_PGF_WAITOK : 0);
if (entry == NULL) if (entry == NULL)
return (ENOMEM); return (ENOMEM);
DMAR_DOMAIN_LOCK(domain); DMAR_DOMAIN_LOCK(domain);
error = dmar_gas_find_space(domain, common, size, offset, flags, error = dmar_gas_find_space(domain, common, size, offset, flags,
entry); entry);
if (error == ENOMEM) { if (error == ENOMEM) {
DMAR_DOMAIN_UNLOCK(domain); DMAR_DOMAIN_UNLOCK(domain);
dmar_gas_free_entry(domain, entry); dmar_gas_free_entry(domain, entry);
return (error); return (error);
} }
#ifdef INVARIANTS #ifdef INVARIANTS
if (dmar_check_free) if (dmar_check_free)
dmar_gas_check_free(domain); dmar_gas_check_free(domain);
#endif #endif
KASSERT(error == 0, KASSERT(error == 0,
("unexpected error %d from dmar_gas_find_entry", error)); ("unexpected error %d from dmar_gas_find_entry", error));
KASSERT(entry->end < domain->end, ("allocated GPA %jx, max GPA %jx", KASSERT(entry->end < domain->end, ("allocated GPA %jx, max GPA %jx",
(uintmax_t)entry->end, (uintmax_t)domain->end)); (uintmax_t)entry->end, (uintmax_t)domain->end));
entry->flags |= eflags; entry->flags |= eflags;
DMAR_DOMAIN_UNLOCK(domain); DMAR_DOMAIN_UNLOCK(domain);
error = domain_map_buf(domain, entry->start, entry->end - entry->start, error = domain_map_buf(domain, entry->start, entry->end - entry->start,
ma, ma,
((eflags & DMAR_MAP_ENTRY_READ) != 0 ? DMAR_PTE_R : 0) | ((eflags & IOMMU_MAP_ENTRY_READ) != 0 ? DMAR_PTE_R : 0) |
((eflags & DMAR_MAP_ENTRY_WRITE) != 0 ? DMAR_PTE_W : 0) | ((eflags & IOMMU_MAP_ENTRY_WRITE) != 0 ? DMAR_PTE_W : 0) |
((eflags & DMAR_MAP_ENTRY_SNOOP) != 0 ? DMAR_PTE_SNP : 0) | ((eflags & IOMMU_MAP_ENTRY_SNOOP) != 0 ? DMAR_PTE_SNP : 0) |
((eflags & DMAR_MAP_ENTRY_TM) != 0 ? DMAR_PTE_TM : 0), ((eflags & IOMMU_MAP_ENTRY_TM) != 0 ? DMAR_PTE_TM : 0),
(flags & DMAR_GM_CANWAIT) != 0 ? DMAR_PGF_WAITOK : 0); (flags & IOMMU_MF_CANWAIT) != 0 ? DMAR_PGF_WAITOK : 0);
if (error == ENOMEM) { if (error == ENOMEM) {
dmar_domain_unload_entry(entry, true); dmar_domain_unload_entry(entry, true);
return (error); return (error);
} }
KASSERT(error == 0, KASSERT(error == 0,
("unexpected error %d from domain_map_buf", error)); ("unexpected error %d from domain_map_buf", error));
*res = entry; *res = entry;
return (0); return (0);
} }
int int
dmar_gas_map_region(struct dmar_domain *domain, struct dmar_map_entry *entry, dmar_gas_map_region(struct dmar_domain *domain, struct iommu_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; iommu_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 | DMAR_GM_RMRR)) == 0, KASSERT((flags & ~(IOMMU_MF_CANWAIT | IOMMU_MF_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);
} }
entry->flags |= eflags; entry->flags |= eflags;
DMAR_DOMAIN_UNLOCK(domain); DMAR_DOMAIN_UNLOCK(domain);
if (entry->end == entry->start) if (entry->end == entry->start)
return (0); return (0);
error = domain_map_buf(domain, entry->start, entry->end - entry->start, error = domain_map_buf(domain, entry->start, entry->end - entry->start,
ma + OFF_TO_IDX(start - entry->start), ma + OFF_TO_IDX(start - entry->start),
((eflags & DMAR_MAP_ENTRY_READ) != 0 ? DMAR_PTE_R : 0) | ((eflags & IOMMU_MAP_ENTRY_READ) != 0 ? DMAR_PTE_R : 0) |
((eflags & DMAR_MAP_ENTRY_WRITE) != 0 ? DMAR_PTE_W : 0) | ((eflags & IOMMU_MAP_ENTRY_WRITE) != 0 ? DMAR_PTE_W : 0) |
((eflags & DMAR_MAP_ENTRY_SNOOP) != 0 ? DMAR_PTE_SNP : 0) | ((eflags & IOMMU_MAP_ENTRY_SNOOP) != 0 ? DMAR_PTE_SNP : 0) |
((eflags & DMAR_MAP_ENTRY_TM) != 0 ? DMAR_PTE_TM : 0), ((eflags & IOMMU_MAP_ENTRY_TM) != 0 ? DMAR_PTE_TM : 0),
(flags & DMAR_GM_CANWAIT) != 0 ? DMAR_PGF_WAITOK : 0); (flags & IOMMU_MF_CANWAIT) != 0 ? DMAR_PGF_WAITOK : 0);
if (error == ENOMEM) { if (error == ENOMEM) {
dmar_domain_unload_entry(entry, false); dmar_domain_unload_entry(entry, false);
return (error); return (error);
} }
KASSERT(error == 0, KASSERT(error == 0,
("unexpected error %d from domain_map_buf", error)); ("unexpected error %d from domain_map_buf", error));
return (0); return (0);
} }
int int
dmar_gas_reserve_region(struct dmar_domain *domain, dmar_gaddr_t start, dmar_gas_reserve_region(struct dmar_domain *domain, iommu_gaddr_t start,
dmar_gaddr_t end) iommu_gaddr_t end)
{ {
struct dmar_map_entry *entry; struct iommu_map_entry *entry;
int error; int error;
entry = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK); entry = dmar_gas_alloc_entry(domain, DMAR_PGF_WAITOK);
entry->start = start; entry->start = start;
entry->end = end; entry->end = end;
DMAR_DOMAIN_LOCK(domain); DMAR_DOMAIN_LOCK(domain);
error = dmar_gas_alloc_region(domain, entry, DMAR_GM_CANWAIT); error = dmar_gas_alloc_region(domain, entry, IOMMU_MF_CANWAIT);
if (error == 0) if (error == 0)
entry->flags |= DMAR_MAP_ENTRY_UNMAPPED; entry->flags |= IOMMU_MAP_ENTRY_UNMAPPED;
DMAR_DOMAIN_UNLOCK(domain); DMAR_DOMAIN_UNLOCK(domain);
if (error != 0) if (error != 0)
dmar_gas_free_entry(domain, entry); dmar_gas_free_entry(domain, entry);
return (error);
}
struct iommu_map_entry *
iommu_map_alloc_entry(struct iommu_domain *iodom, u_int flags)
{
struct dmar_domain *domain;
struct iommu_map_entry *res;
domain = (struct dmar_domain *)iodom;
res = dmar_gas_alloc_entry(domain, flags);
return (res);
}
void
iommu_map_free_entry(struct iommu_domain *iodom, struct iommu_map_entry *entry)
{
struct dmar_domain *domain;
domain = (struct dmar_domain *)iodom;
dmar_gas_free_entry(domain, entry);
}
int
iommu_map(struct iommu_domain *iodom,
const struct bus_dma_tag_common *common, iommu_gaddr_t size, int offset,
u_int eflags, u_int flags, vm_page_t *ma, struct iommu_map_entry **res)
{
struct dmar_domain *domain;
int error;
domain = (struct dmar_domain *)iodom;
error = dmar_gas_map(domain, common, size, offset, eflags, flags,
ma, res);
return (error);
}
int
iommu_map_region(struct iommu_domain *iodom, struct iommu_map_entry *entry,
u_int eflags, u_int flags, vm_page_t *ma)
{
struct dmar_domain *domain;
int error;
domain = (struct dmar_domain *)iodom;
error = dmar_gas_map_region(domain, entry, eflags, flags, ma);
return (error); return (error);
} }