-/******************************************************************************
+ /******************************************************************************
* drivers/xen/tpmback/interface.c
*
* Vritual TPM interface management.
static kmem_cache_t *tpmif_cachep;
int num_frontends = 0;
-LIST_HEAD(tpmif_list);
+LIST_HEAD(tpmif_list);
-tpmif_t *alloc_tpmif(domid_t domid, long int instance)
+tpmif_t *
+alloc_tpmif(domid_t domid, long int instance)
{
- struct page *page;
- tpmif_t *tpmif;
+ struct page *page;
+ tpmif_t *tpmif;
- tpmif = kmem_cache_alloc(tpmif_cachep, GFP_KERNEL);
- if (!tpmif)
- return ERR_PTR(-ENOMEM);
+ tpmif = kmem_cache_alloc(tpmif_cachep, GFP_KERNEL);
+ if (!tpmif)
+ return ERR_PTR(-ENOMEM);
- memset(tpmif, 0, sizeof(*tpmif));
- tpmif->domid = domid;
- tpmif->status = DISCONNECTED;
- tpmif->tpm_instance = instance;
- atomic_set(&tpmif->refcnt, 1);
+ memset(tpmif, 0, sizeof (*tpmif));
+ tpmif->domid = domid;
+ tpmif->status = DISCONNECTED;
+ tpmif->tpm_instance = instance;
+ atomic_set(&tpmif->refcnt, 1);
- page = balloon_alloc_empty_page_range(TPMIF_TX_RING_SIZE);
- BUG_ON(page == NULL);
- tpmif->mmap_vstart = (unsigned long)pfn_to_kaddr(page_to_pfn(page));
+ page = balloon_alloc_empty_page_range(TPMIF_TX_RING_SIZE);
+ BUG_ON(page == NULL);
+ tpmif->mmap_vstart = (unsigned long)pfn_to_kaddr(page_to_pfn(page));
- list_add(&tpmif->tpmif_list, &tpmif_list);
- num_frontends++;
+ list_add(&tpmif->tpmif_list, &tpmif_list);
+ num_frontends++;
- return tpmif;
+ return tpmif;
}
-
-void free_tpmif(tpmif_t *tpmif)
+void
+free_tpmif(tpmif_t * tpmif)
{
- num_frontends--;
- list_del(&tpmif->tpmif_list);
- kmem_cache_free(tpmif_cachep, tpmif);
+ num_frontends--;
+ list_del(&tpmif->tpmif_list);
+ kmem_cache_free(tpmif_cachep, tpmif);
}
-
-tpmif_t *tpmif_find(domid_t domid, long int instance)
+tpmif_t *
+tpmif_find(domid_t domid, long int instance)
{
- tpmif_t *tpmif;
-
- list_for_each_entry(tpmif, &tpmif_list, tpmif_list) {
- if (tpmif->tpm_instance == instance) {
- if (tpmif->domid == domid) {
- tpmif_get(tpmif);
- return tpmif;
- } else {
- return NULL;
- }
- }
- }
-
- return alloc_tpmif(domid, instance);
+ tpmif_t *tpmif;
+
+ list_for_each_entry(tpmif, &tpmif_list, tpmif_list) {
+ if (tpmif->tpm_instance == instance) {
+ if (tpmif->domid == domid) {
+ tpmif_get(tpmif);
+ return tpmif;
+ } else {
+ return NULL;
+ }
+ }
+ }
+
+ return alloc_tpmif(domid, instance);
}
-
-static int map_frontend_page(tpmif_t *tpmif, unsigned long localaddr,
- unsigned long shared_page)
+static int
+map_frontend_page(tpmif_t * tpmif, unsigned long localaddr,
+ unsigned long shared_page)
{
- struct gnttab_map_grant_ref op = {
- .host_addr = localaddr,
- .flags = GNTMAP_host_map,
- .ref = shared_page,
- .dom = tpmif->domid,
- };
-
- BUG_ON( HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1) );
-
- if (op.handle < 0) {
- DPRINTK(" Grant table operation failure !\n");
- return op.handle;
- }
-
- tpmif->shmem_ref = shared_page;
- tpmif->shmem_handle = op.handle;
- tpmif->shmem_vaddr = localaddr;
- return 0;
+ struct gnttab_map_grant_ref op = {
+ .host_addr = localaddr,
+ .flags = GNTMAP_host_map,
+ .ref = shared_page,
+ .dom = tpmif->domid,
+ };
+
+ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1));
+
+ if (op.handle < 0) {
+ DPRINTK(" Grant table operation failure !\n");
+ return op.handle;
+ }
+
+ tpmif->shmem_ref = shared_page;
+ tpmif->shmem_handle = op.handle;
+ tpmif->shmem_vaddr = localaddr;
+ return 0;
}
-
-static void unmap_frontend_page(tpmif_t *tpmif)
+static void
+unmap_frontend_page(tpmif_t * tpmif)
{
- struct gnttab_unmap_grant_ref op;
+ struct gnttab_unmap_grant_ref op;
- op.host_addr = tpmif->shmem_vaddr;
- op.handle = tpmif->shmem_handle;
- op.dev_bus_addr = 0;
+ op.host_addr = tpmif->shmem_vaddr;
+ op.handle = tpmif->shmem_handle;
+ op.dev_bus_addr = 0;
- BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1));
+ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1));
}
-
-int tpmif_map(tpmif_t *tpmif,
- unsigned long shared_page, unsigned int evtchn)
+int
+tpmif_map(tpmif_t * tpmif, unsigned long shared_page, unsigned int evtchn)
{
- struct vm_struct *vma;
- evtchn_op_t op = { .cmd = EVTCHNOP_bind_interdomain };
- int err;
-
- BUG_ON(tpmif->remote_evtchn);
-
- if ( (vma = get_vm_area(PAGE_SIZE, VM_IOREMAP)) == NULL )
- return -ENOMEM;
-
- err = map_frontend_page(tpmif,
- VMALLOC_VMADDR(vma->addr),
- shared_page);
- if (err) {
- vfree(vma->addr);
- return err;
- }
-
- op.u.bind_interdomain.dom1 = DOMID_SELF;
- op.u.bind_interdomain.dom2 = tpmif->domid;
- op.u.bind_interdomain.port1 = 0;
- op.u.bind_interdomain.port2 = evtchn;
- err = HYPERVISOR_event_channel_op(&op);
- if (err) {
- unmap_frontend_page(tpmif);
- vfree(vma->addr);
- return err;
- }
-
- tpmif->evtchn = op.u.bind_interdomain.port1;
- tpmif->remote_evtchn = evtchn;
-
- tpmif->tx = (tpmif_tx_interface_t *) vma->addr;
-
- bind_evtchn_to_irqhandler(tpmif->evtchn,
- tpmif_be_int,
- 0,
- "tpmif-backend",
- tpmif);
- tpmif->status = CONNECTED;
- tpmif->shmem_ref = shared_page;
- tpmif->active = 1;
-
- return 0;
+ struct vm_struct *vma;
+ evtchn_op_t op = {.cmd = EVTCHNOP_bind_interdomain };
+ int err;
+
+ BUG_ON(tpmif->remote_evtchn);
+
+ if ((vma = get_vm_area(PAGE_SIZE, VM_IOREMAP)) == NULL)
+ return -ENOMEM;
+
+ err = map_frontend_page(tpmif, VMALLOC_VMADDR(vma->addr), shared_page);
+ if (err) {
+ vfree(vma->addr);
+ return err;
+ }
+
+ op.u.bind_interdomain.dom1 = DOMID_SELF;
+ op.u.bind_interdomain.dom2 = tpmif->domid;
+ op.u.bind_interdomain.port1 = 0;
+ op.u.bind_interdomain.port2 = evtchn;
+ err = HYPERVISOR_event_channel_op(&op);
+ if (err) {
+ unmap_frontend_page(tpmif);
+ vfree(vma->addr);
+ return err;
+ }
+
+ tpmif->evtchn = op.u.bind_interdomain.port1;
+ tpmif->remote_evtchn = evtchn;
+
+ tpmif->tx = (tpmif_tx_interface_t *) vma->addr;
+
+ bind_evtchn_to_irqhandler(tpmif->evtchn,
+ tpmif_be_int, 0, "tpmif-backend", tpmif);
+ tpmif->status = CONNECTED;
+ tpmif->shmem_ref = shared_page;
+ tpmif->active = 1;
+
+ return 0;
}
-
-static void __tpmif_disconnect_complete(void *arg)
+static void
+__tpmif_disconnect_complete(void *arg)
{
- evtchn_op_t op = { .cmd = EVTCHNOP_close };
- tpmif_t *tpmif = (tpmif_t *) arg;
+ evtchn_op_t op = {.cmd = EVTCHNOP_close };
+ tpmif_t *tpmif = (tpmif_t *) arg;
- op.u.close.port = tpmif->evtchn;
- op.u.close.dom = DOMID_SELF;
- HYPERVISOR_event_channel_op(&op);
- op.u.close.port = tpmif->remote_evtchn;
- op.u.close.dom = tpmif->domid;
- HYPERVISOR_event_channel_op(&op);
+ op.u.close.port = tpmif->evtchn;
+ op.u.close.dom = DOMID_SELF;
+ HYPERVISOR_event_channel_op(&op);
+ op.u.close.port = tpmif->remote_evtchn;
+ op.u.close.dom = tpmif->domid;
+ HYPERVISOR_event_channel_op(&op);
- if (tpmif->evtchn)
- unbind_evtchn_from_irqhandler(tpmif->evtchn, tpmif);
+ if (tpmif->evtchn)
+ unbind_evtchn_from_irqhandler(tpmif->evtchn, tpmif);
- if (tpmif->tx) {
- unmap_frontend_page(tpmif);
- vfree(tpmif->tx);
- }
+ if (tpmif->tx) {
+ unmap_frontend_page(tpmif);
+ vfree(tpmif->tx);
+ }
- free_tpmif(tpmif);
+ free_tpmif(tpmif);
}
-
-void tpmif_disconnect_complete(tpmif_t * tpmif)
+void
+tpmif_disconnect_complete(tpmif_t * tpmif)
{
- INIT_WORK(&tpmif->work, __tpmif_disconnect_complete, (void *)tpmif);
- schedule_work(&tpmif->work);
+ INIT_WORK(&tpmif->work, __tpmif_disconnect_complete, (void *)tpmif);
+ schedule_work(&tpmif->work);
}
-
-void __init tpmif_interface_init(void)
+void __init
+tpmif_interface_init(void)
{
- tpmif_cachep = kmem_cache_create("tpmif_cache", sizeof(tpmif_t),
- 0, 0, NULL, NULL);
+ tpmif_cachep = kmem_cache_create("tpmif_cache", sizeof (tpmif_t),
+ 0, 0, NULL, NULL);
}
projects / xen.git / commitdiff