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head/sys/vm/device_pager.c
| Show First 20 Lines • Show All 283 Lines • ▼ Show 20 Lines | |||||
| static int | static int | ||||
| dev_pager_getpages(vm_object_t object, vm_page_t *ma, int count, int *rbehind, | dev_pager_getpages(vm_object_t object, vm_page_t *ma, int count, int *rbehind, | ||||
| int *rahead) | int *rahead) | ||||
| { | { | ||||
| int error; | int error; | ||||
| /* Since our haspage reports zero after/before, the count is 1. */ | /* Since our haspage reports zero after/before, the count is 1. */ | ||||
| KASSERT(count == 1, ("%s: count %d", __func__, count)); | KASSERT(count == 1, ("%s: count %d", __func__, count)); | ||||
| VM_OBJECT_ASSERT_WLOCKED(object); | |||||
| if (object->un_pager.devp.ops->cdev_pg_fault == NULL) | if (object->un_pager.devp.ops->cdev_pg_fault == NULL) | ||||
| return (VM_PAGER_FAIL); | return (VM_PAGER_FAIL); | ||||
| VM_OBJECT_WLOCK(object); | |||||
| error = object->un_pager.devp.ops->cdev_pg_fault(object, | error = object->un_pager.devp.ops->cdev_pg_fault(object, | ||||
| IDX_TO_OFF(ma[0]->pindex), PROT_READ, &ma[0]); | IDX_TO_OFF(ma[0]->pindex), PROT_READ, &ma[0]); | ||||
| VM_OBJECT_ASSERT_WLOCKED(object); | VM_OBJECT_ASSERT_WLOCKED(object); | ||||
| if (error == VM_PAGER_OK) { | if (error == VM_PAGER_OK) { | ||||
| KASSERT((object->type == OBJT_DEVICE && | KASSERT((object->type == OBJT_DEVICE && | ||||
| (ma[0]->oflags & VPO_UNMANAGED) != 0) || | (ma[0]->oflags & VPO_UNMANAGED) != 0) || | ||||
| (object->type == OBJT_MGTDEVICE && | (object->type == OBJT_MGTDEVICE && | ||||
| (ma[0]->oflags & VPO_UNMANAGED) == 0), | (ma[0]->oflags & VPO_UNMANAGED) == 0), | ||||
| ("Wrong page type %p %p", ma[0], object)); | ("Wrong page type %p %p", ma[0], object)); | ||||
| if (object->type == OBJT_DEVICE) { | if (object->type == OBJT_DEVICE) { | ||||
| TAILQ_INSERT_TAIL(&object->un_pager.devp.devp_pglist, | TAILQ_INSERT_TAIL(&object->un_pager.devp.devp_pglist, | ||||
| ma[0], plinks.q); | ma[0], plinks.q); | ||||
| } | } | ||||
| if (rbehind) | if (rbehind) | ||||
| *rbehind = 0; | *rbehind = 0; | ||||
| if (rahead) | if (rahead) | ||||
| *rahead = 0; | *rahead = 0; | ||||
| } | } | ||||
| VM_OBJECT_WUNLOCK(object); | |||||
| return (error); | return (error); | ||||
| } | } | ||||
| static int | static int | ||||
| dev_pager_populate(vm_object_t object, vm_pindex_t pidx, int fault_type, | dev_pager_populate(vm_object_t object, vm_pindex_t pidx, int fault_type, | ||||
| vm_prot_t max_prot, vm_pindex_t *first, vm_pindex_t *last) | vm_prot_t max_prot, vm_pindex_t *first, vm_pindex_t *last) | ||||
| { | { | ||||
| ▲ Show 20 Lines • Show All 148 Lines • Show Last 20 Lines | |||||