void
vmxnet3s_txcache_release(vmxnet3s_softc_t *dp)
{
int i;
int rc;
vmxnet3s_txcache_t *cache = &dp->txcache;
/* Unmap pages */
hat_unload(kas.a_hat, cache->window, ptob(cache->num_pages),
HAT_UNLOAD_UNLOCK);
vmem_free(heap_arena, cache->window, ptob(cache->num_pages));
/* Free pages */
for (i = 0; i < cache->num_pages; i++) {
rc = page_tryupgrade(cache->pages[i]);
if (!rc) {
page_unlock(cache->pages[i]);
while (!page_lock(cache->pages[i], SE_EXCL, NULL,
P_RECLAIM))
;
}
page_free(cache->pages[i], 0);
}
page_unresv(cache->num_pages);
kmem_free(cache->pages, cache->num_pages * sizeof (page_t *));
kmem_free(cache->page_maps, cache->num_pages * sizeof (page_t *));
kmem_free(cache->nodes,
cache->num_nodes * sizeof (vmxnet3s_txcache_node_t));
}
/*
* We only support unmapping the whole segment, and we automatically unlock
* what we previously soft-locked.
*/
static int
segmf_unmap(struct seg *seg, caddr_t addr, size_t len)
{
struct segmf_data *data = seg->s_data;
offset_t off;
if (addr < seg->s_base || addr + len > seg->s_base + seg->s_size ||
(len & PAGEOFFSET) || ((uintptr_t)addr & PAGEOFFSET))
panic("segmf_unmap");
if (addr != seg->s_base || len != seg->s_size)
return (ENOTSUP);
hat_unload(seg->s_as->a_hat, addr, len,
HAT_UNLOAD_UNMAP | HAT_UNLOAD_UNLOCK);
off = (offset_t)seg_page(seg, addr);
ASSERT(data->vp != NULL);
(void) VOP_DELMAP(VTOCVP(data->vp), off, seg->s_as, addr, len,
data->prot, data->maxprot, MAP_SHARED, CRED(), NULL);
seg_free(seg);
return (0);
}
static void
pci_cfgacc_unmap()
{
if (khat_running)
hat_unload(kas.a_hat, pci_cfgacc_virt_base, MMU_PAGESIZE,
HAT_UNLOAD_UNLOCK);
}
int
segmf_create(struct seg *seg, void *args)
{
struct segmf_crargs *a = args;
struct segmf_data *data;
struct as *as = seg->s_as;
pgcnt_t i, npages = seg_pages(seg);
int error;
hat_map(as->a_hat, seg->s_base, seg->s_size, HAT_MAP);
data = segmf_data_zalloc(seg);
data->vp = specfind(a->dev, VCHR);
data->prot = a->prot;
data->maxprot = a->maxprot;
data->map = kmem_alloc(npages * sizeof (segmf_map_t), KM_SLEEP);
for (i = 0; i < npages; i++) {
data->map[i].t_type = SEGMF_MAP_EMPTY;
}
error = VOP_ADDMAP(VTOCVP(data->vp), 0, as, seg->s_base, seg->s_size,
data->prot, data->maxprot, MAP_SHARED, CRED(), NULL);
if (error != 0)
hat_unload(as->a_hat,
seg->s_base, seg->s_size, HAT_UNLOAD_UNMAP);
return (error);
}
/*
* Legacy entry points from here to end of file.
*/
void
segkmem_mapin(struct seg *seg, void *addr, size_t size, uint_t vprot,
pfn_t pfn, uint_t flags)
{
hat_unload(seg->s_as->a_hat, addr, size, HAT_UNLOAD_UNLOCK);
hat_devload(seg->s_as->a_hat, addr, size, pfn, vprot,
flags | HAT_LOAD_LOCK);
}
void
mach_cpucontext_fini(void)
{
if (warm_reset_vector)
psm_unmap_phys((caddr_t)warm_reset_vector,
sizeof (warm_reset_vector));
hat_unload(kas.a_hat, (caddr_t)(uintptr_t)rm_platter_pa, MMU_PAGESIZE,
HAT_UNLOAD);
}
/*
* Any changes to this routine must also be carried over to
* devmap_free_pages() in the seg_dev driver. This is because
* we currently don't have a special kernel segment for non-paged
* kernel memory that is exported by drivers to user space.
*/
static void
segkmem_free_vn(vmem_t *vmp, void *inaddr, size_t size, struct vnode *vp,
void (*func)(page_t *))
{
page_t *pp;
caddr_t addr = inaddr;
caddr_t eaddr;
pgcnt_t npages = btopr(size);
ASSERT(((uintptr_t)addr & PAGEOFFSET) == 0);
ASSERT(vp != NULL);
if (kvseg.s_base == NULL) {
segkmem_gc_list_t *gc = inaddr;
gc->gc_arena = vmp;
gc->gc_size = size;
gc->gc_next = segkmem_gc_list;
segkmem_gc_list = gc;
return;
}
hat_unload(kas.a_hat, addr, size, HAT_UNLOAD_UNLOCK);
for (eaddr = addr + size; addr < eaddr; addr += PAGESIZE) {
#if defined(__x86)
pp = page_find(vp, (u_offset_t)(uintptr_t)addr);
if (pp == NULL)
panic("segkmem_free: page not found");
if (!page_tryupgrade(pp)) {
/*
* Some other thread has a sharelock. Wait for
* it to drop the lock so we can free this page.
*/
page_unlock(pp);
pp = page_lookup(vp, (u_offset_t)(uintptr_t)addr,
SE_EXCL);
}
#else
pp = page_lookup(vp, (u_offset_t)(uintptr_t)addr, SE_EXCL);
#endif
if (pp == NULL)
panic("segkmem_free: page not found");
/* Clear p_lckcnt so page_destroy() doesn't update availrmem */
pp->p_lckcnt = 0;
if (func)
func(pp);
else
page_destroy(pp, 0);
}
if (func == NULL)
page_unresv(npages);
if (vmp != NULL)
vmem_free(vmp, inaddr, size);
}
static int
mmio(struct uio *uio, enum uio_rw rw, pfn_t pfn, off_t pageoff, int allowio,
page_t *pp)
{
int error = 0;
int devload = 0;
int is_memory = pf_is_memory(pfn);
size_t nbytes = MIN((size_t)(PAGESIZE - pageoff),
(size_t)uio->uio_iov->iov_len);
caddr_t va = NULL;
mutex_enter(&mm_lock);
if (is_memory && kpm_enable) {
if (pp)
va = hat_kpm_mapin(pp, NULL);
else
va = hat_kpm_mapin_pfn(pfn);
}
if (va == NULL) {
hat_devload(kas.a_hat, mm_map, PAGESIZE, pfn,
(uint_t)(rw == UIO_READ ? PROT_READ : PROT_READ|PROT_WRITE),
HAT_LOAD_NOCONSIST|HAT_LOAD_LOCK);
va = mm_map;
devload = 1;
}
if (!is_memory) {
if (allowio) {
size_t c = uio->uio_iov->iov_len;
if (ddi_peekpokeio(NULL, uio, rw,
(caddr_t)(uintptr_t)uio->uio_loffset, c,
sizeof (int32_t)) != DDI_SUCCESS)
error = EFAULT;
} else
error = EIO;
} else
error = uiomove(va + pageoff, nbytes, rw, uio);
if (devload)
hat_unload(kas.a_hat, mm_map, PAGESIZE, HAT_UNLOAD_UNLOCK);
else if (pp)
hat_kpm_mapout(pp, NULL, va);
else
hat_kpm_mapout_pfn(pfn);
mutex_exit(&mm_lock);
return (error);
}
void
psm_unmap(caddr_t addr, size_t len)
{
uint_t pgoffset;
caddr_t base;
pgcnt_t npages;
if (len == 0)
return;
pgoffset = (uintptr_t)addr & MMU_PAGEOFFSET;
base = addr - pgoffset;
npages = mmu_btopr(len + pgoffset);
hat_unload(kas.a_hat, base, ptob(npages), HAT_UNLOAD_UNLOCK);
device_arena_free(base, ptob(npages));
}
/*ARGSUSED*/
void
hat_kpm_delmem_mseg_update(struct memseg *msp, struct memseg **mspp)
{
pfn_t base, end;
/*
* The meta (page_t) pages for dynamically added memory are allocated
* either from the incoming memory itself or from existing memory.
* In the former case the base of the incoming pages will be different
* than the base of the dynamic segment so call memseg_get_start() to
* get the actual base of the incoming memory for each case.
*/
base = memseg_get_start(msp);
end = msp->pages_end;
hat_unload(kas.a_hat, kpm_vbase + mmu_ptob(base), mmu_ptob(end - base),
HAT_UNLOAD | HAT_UNLOAD_UNLOCK | HAT_UNLOAD_UNMAP);
}
static int
segkmem_setprot(struct seg *seg, caddr_t addr, size_t size, uint_t prot)
{
ASSERT(RW_LOCK_HELD(&seg->s_as->a_lock));
if (seg->s_as != &kas || size > seg->s_size ||
addr < seg->s_base || addr + size > seg->s_base + seg->s_size)
panic("segkmem_setprot: bad args");
/*
* If it is one of segkp pages, call segkp.
*/
if (segkp_bitmap && seg == &kvseg &&
BT_TEST(segkp_bitmap, btop((uintptr_t)(addr - seg->s_base))))
return (SEGOP_SETPROT(segkp, addr, size, prot));
if (prot == 0)
hat_unload(kas.a_hat, addr, size, HAT_UNLOAD);
else
hat_chgprot(kas.a_hat, addr, size, prot);
return (0);
}
/*ARGSUSED*/
static void
xpvtap_segmf_unregister(struct as *as, void *arg, uint_t event)
{
xpvtap_state_t *state;
caddr_t uaddr;
uint_t pgcnt;
int i;
state = (xpvtap_state_t *)arg;
if (!state->bt_map.um_registered) {
/* remove the callback (which is this routine) */
(void) as_delete_callback(as, arg);
return;
}
pgcnt = btopr(state->bt_map.um_guest_size);
uaddr = state->bt_map.um_guest_pages;
/* unmap any outstanding req's grefs */
xpvtap_rs_flush(state->bt_map.um_rs, xpvtap_user_request_unmap, state);
/* Unlock the gref pages */
for (i = 0; i < pgcnt; i++) {
AS_LOCK_ENTER(as, RW_WRITER);
hat_prepare_mapping(as->a_hat, uaddr, NULL);
hat_unload(as->a_hat, uaddr, PAGESIZE, HAT_UNLOAD_UNLOCK);
hat_release_mapping(as->a_hat, uaddr);
AS_LOCK_EXIT(as);
uaddr += PAGESIZE;
}
/* remove the callback (which is this routine) */
(void) as_delete_callback(as, arg);
state->bt_map.um_registered = B_FALSE;
}
static void
segkmem_free_one_lp(caddr_t addr, size_t size)
{
page_t *pp, *rootpp = NULL;
pgcnt_t pgs_left = btopr(size);
ASSERT(size == segkmem_lpsize);
hat_unload(kas.a_hat, addr, size, HAT_UNLOAD_UNLOCK);
for (; pgs_left > 0; addr += PAGESIZE, pgs_left--) {
pp = page_lookup(&kvp, (u_offset_t)(uintptr_t)addr, SE_EXCL);
if (pp == NULL)
panic("segkmem_free_one_lp: page not found");
ASSERT(PAGE_EXCL(pp));
pp->p_lckcnt = 0;
if (rootpp == NULL)
rootpp = pp;
}
ASSERT(rootpp != NULL);
page_destroy_pages(rootpp);
/* page_unresv() is done by the caller */
}
/*
* balloon_free_pages()
* free page_cnt pages, using any combination of mfns, pfns, and kva as long
* as they refer to the same mapping. If an array of mfns is passed in, we
* assume they were already cleared. Otherwise, we need to zero the pages
* before giving them back to the hypervisor. kva space is not free'd up in
* case the caller wants to re-use it.
*/
long
balloon_free_pages(uint_t page_cnt, mfn_t *mfns, caddr_t kva, pfn_t *pfns)
{
xen_memory_reservation_t memdec;
mfn_t mfn;
pfn_t pfn;
uint_t i;
long e;
#if DEBUG
/* make sure kva is page aligned and maps to first pfn */
if (kva != NULL) {
ASSERT(((uintptr_t)kva & PAGEOFFSET) == 0);
if (pfns != NULL) {
ASSERT(hat_getpfnum(kas.a_hat, kva) == pfns[0]);
}
}
#endif
/* if we have a kva, we can clean all pages with just one bzero */
if ((kva != NULL) && balloon_zero_memory) {
bzero(kva, (page_cnt * PAGESIZE));
}
/* if we were given a kva and/or a pfn */
if ((kva != NULL) || (pfns != NULL)) {
/*
* All the current callers only pass 1 page when using kva or
* pfns, and use mfns when passing multiple pages. If that
* assumption is changed, the following code will need some
* work. The following ASSERT() guarantees we're respecting
* the io locking quota.
*/
ASSERT(page_cnt < bln_contig_list_quota);
/* go through all the pages */
for (i = 0; i < page_cnt; i++) {
/* get the next pfn */
if (pfns == NULL) {
pfn = hat_getpfnum(kas.a_hat,
(kva + (PAGESIZE * i)));
} else {
pfn = pfns[i];
}
/*
* if we didn't already zero this page, do it now. we
* need to do this *before* we give back the MFN
*/
if ((kva == NULL) && (balloon_zero_memory)) {
pfnzero(pfn, 0, PAGESIZE);
}
/*
* unmap the pfn. We don't free up the kva vmem space
* so the caller can re-use it. The page must be
* unmapped before it is given back to the hypervisor.
*/
if (kva != NULL) {
hat_unload(kas.a_hat, (kva + (PAGESIZE * i)),
PAGESIZE, HAT_UNLOAD_UNMAP);
}
/* grab the mfn before the pfn is marked as invalid */
mfn = pfn_to_mfn(pfn);
/* mark the pfn as invalid */
reassign_pfn(pfn, MFN_INVALID);
/*
* if we weren't given an array of MFNs, we need to
* free them up one at a time. Otherwise, we'll wait
* until later and do it in one hypercall
*/
if (mfns == NULL) {
bzero(&memdec, sizeof (memdec));
/*LINTED: constant in conditional context*/
set_xen_guest_handle(memdec.extent_start, &mfn);
memdec.domid = DOMID_SELF;
memdec.nr_extents = 1;
e = HYPERVISOR_memory_op(
XENMEM_decrease_reservation, &memdec);
if (e != 1) {
cmn_err(CE_PANIC, "balloon: unable to "
"give a page back to the "
"hypervisor.\n");
}
}
}
}
/*
* if we were passed in MFNs, we haven't free'd them up yet. We can
* do it with one call.
*/
if (mfns != NULL) {
bzero(&memdec, sizeof (memdec));
/*LINTED: constant in conditional context*/
set_xen_guest_handle(memdec.extent_start, mfns);
memdec.domid = DOMID_SELF;
memdec.nr_extents = page_cnt;
e = HYPERVISOR_memory_op(XENMEM_decrease_reservation, &memdec);
if (e != page_cnt) {
cmn_err(CE_PANIC, "balloon: unable to give pages back "
"to the hypervisor.\n");
}
}
atomic_add_long((ulong_t *)&bln_stats.bln_hv_pages, page_cnt);
return (page_cnt);
}
/*ARGSUSED*/
static int
segmf_faultpage(struct hat *hat, struct seg *seg, caddr_t addr,
enum fault_type type, uint_t prot)
{
struct segmf_data *data = seg->s_data;
uint_t hat_flags = HAT_LOAD_NOCONSIST;
mfn_t mfn;
x86pte_t pte;
segmf_map_t *map;
uint_t idx;
idx = seg_page(seg, addr);
map = &data->map[idx];
ASSERT(map->t_type == SEGMF_MAP_MFN);
mfn = map->u.m.m_mfn;
if (type == F_SOFTLOCK) {
mutex_enter(&freemem_lock);
data->softlockcnt++;
mutex_exit(&freemem_lock);
hat_flags |= HAT_LOAD_LOCK;
} else
hat_flags |= HAT_LOAD;
if (segmf_faultpage_debug > 0) {
uprintf("segmf_faultpage: addr %p domid %x mfn %lx prot %x\n",
(void *)addr, data->domid, mfn, prot);
segmf_faultpage_debug--;
}
/*
* Ask the HAT to load a throwaway mapping to page zero, then
* overwrite it with our foreign domain mapping. It gets removed
* later via hat_unload()
*/
hat_devload(hat, addr, MMU_PAGESIZE, (pfn_t)0,
PROT_READ | HAT_UNORDERED_OK, hat_flags);
pte = mmu_ptob((x86pte_t)mfn) | PT_VALID | PT_USER | PT_FOREIGN;
if (prot & PROT_WRITE)
pte |= PT_WRITABLE;
if (HYPERVISOR_update_va_mapping_otherdomain((uintptr_t)addr, pte,
UVMF_INVLPG | UVMF_ALL, data->domid) != 0) {
hat_flags = HAT_UNLOAD_UNMAP;
if (type == F_SOFTLOCK) {
hat_flags |= HAT_UNLOAD_UNLOCK;
mutex_enter(&freemem_lock);
data->softlockcnt--;
mutex_exit(&freemem_lock);
}
hat_unload(hat, addr, MMU_PAGESIZE, hat_flags);
return (FC_MAKE_ERR(EFAULT));
}
return (0);
}
void
segkmem_mapout(struct seg *seg, void *addr, size_t size)
{
hat_unload(seg->s_as->a_hat, addr, size, HAT_UNLOAD_UNLOCK);
}
