| device_pager.c (291446) | device_pager.c (292373) |
|---|---|
| 1/*- 2 * Copyright (c) 1990 University of Utah. 3 * Copyright (c) 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)device_pager.c 8.1 (Berkeley) 6/11/93 35 */ 36 37#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1990 University of Utah. 3 * Copyright (c) 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)device_pager.c 8.1 (Berkeley) 6/11/93 35 */ 36 37#include <sys/cdefs.h> |
| 38__FBSDID("$FreeBSD: head/sys/vm/device_pager.c 291446 2015-11-29 11:37:25Z kib $"); | 38__FBSDID("$FreeBSD: head/sys/vm/device_pager.c 292373 2015-12-16 21:30:45Z glebius $"); |
| 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/conf.h> 43#include <sys/lock.h> 44#include <sys/proc.h> 45#include <sys/mutex.h> 46#include <sys/mman.h> --- 7 unchanged lines hidden (view full) --- 54#include <vm/vm_pager.h> 55#include <vm/vm_phys.h> 56#include <vm/uma.h> 57 58static void dev_pager_init(void); 59static vm_object_t dev_pager_alloc(void *, vm_ooffset_t, vm_prot_t, 60 vm_ooffset_t, struct ucred *); 61static void dev_pager_dealloc(vm_object_t); | 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/conf.h> 43#include <sys/lock.h> 44#include <sys/proc.h> 45#include <sys/mutex.h> 46#include <sys/mman.h> --- 7 unchanged lines hidden (view full) --- 54#include <vm/vm_pager.h> 55#include <vm/vm_phys.h> 56#include <vm/uma.h> 57 58static void dev_pager_init(void); 59static vm_object_t dev_pager_alloc(void *, vm_ooffset_t, vm_prot_t, 60 vm_ooffset_t, struct ucred *); 61static void dev_pager_dealloc(vm_object_t); |
| 62static int dev_pager_getpages(vm_object_t, vm_page_t *, int, int); | 62static int dev_pager_getpages(vm_object_t, vm_page_t *, int, int *, int *); |
| 63static void dev_pager_putpages(vm_object_t, vm_page_t *, int, int, int *); 64static boolean_t dev_pager_haspage(vm_object_t, vm_pindex_t, int *, int *); 65static void dev_pager_free_page(vm_object_t object, vm_page_t m); 66 67/* list of device pager objects */ 68static struct pagerlst dev_pager_object_list; 69/* protect list manipulation */ 70static struct mtx dev_pager_mtx; --- 181 unchanged lines hidden (view full) --- 252 != NULL) 253 dev_pager_free_page(object, m); 254 } 255 object->handle = NULL; 256 object->type = OBJT_DEAD; 257} 258 259static int | 63static void dev_pager_putpages(vm_object_t, vm_page_t *, int, int, int *); 64static boolean_t dev_pager_haspage(vm_object_t, vm_pindex_t, int *, int *); 65static void dev_pager_free_page(vm_object_t object, vm_page_t m); 66 67/* list of device pager objects */ 68static struct pagerlst dev_pager_object_list; 69/* protect list manipulation */ 70static struct mtx dev_pager_mtx; --- 181 unchanged lines hidden (view full) --- 252 != NULL) 253 dev_pager_free_page(object, m); 254 } 255 object->handle = NULL; 256 object->type = OBJT_DEAD; 257} 258 259static int |
| 260dev_pager_getpages(vm_object_t object, vm_page_t *ma, int count, int reqpage) | 260dev_pager_getpages(vm_object_t object, vm_page_t *ma, int count, int *rbehind, 261 int *rahead) |
| 261{ 262 int error; 263 | 262{ 263 int error; 264 |
| 265 /* Since our haspage reports zero after/before, the count is 1. */ 266 KASSERT(count == 1, ("%s: count %d", __func__, count)); |
|
| 264 VM_OBJECT_ASSERT_WLOCKED(object); 265 error = object->un_pager.devp.ops->cdev_pg_fault(object, | 267 VM_OBJECT_ASSERT_WLOCKED(object); 268 error = object->un_pager.devp.ops->cdev_pg_fault(object, |
| 266 IDX_TO_OFF(ma[reqpage]->pindex), PROT_READ, &ma[reqpage]); | 269 IDX_TO_OFF(ma[0]->pindex), PROT_READ, &ma[0]); |
| 267 268 VM_OBJECT_ASSERT_WLOCKED(object); 269 | 270 271 VM_OBJECT_ASSERT_WLOCKED(object); 272 |
| 270 vm_pager_free_nonreq(object, ma, reqpage, count, TRUE); 271 | |
| 272 if (error == VM_PAGER_OK) { 273 KASSERT((object->type == OBJT_DEVICE && | 273 if (error == VM_PAGER_OK) { 274 KASSERT((object->type == OBJT_DEVICE && |
| 274 (ma[reqpage]->oflags & VPO_UNMANAGED) != 0) || | 275 (ma[0]->oflags & VPO_UNMANAGED) != 0) || |
| 275 (object->type == OBJT_MGTDEVICE && | 276 (object->type == OBJT_MGTDEVICE && |
| 276 (ma[reqpage]->oflags & VPO_UNMANAGED) == 0), 277 ("Wrong page type %p %p", ma[reqpage], object)); | 277 (ma[0]->oflags & VPO_UNMANAGED) == 0), 278 ("Wrong page type %p %p", ma[0], object)); |
| 278 if (object->type == OBJT_DEVICE) { 279 TAILQ_INSERT_TAIL(&object->un_pager.devp.devp_pglist, | 279 if (object->type == OBJT_DEVICE) { 280 TAILQ_INSERT_TAIL(&object->un_pager.devp.devp_pglist, |
| 280 ma[reqpage], plinks.q); | 281 ma[0], plinks.q); |
| 281 } | 282 } |
| 283 if (rbehind) 284 *rbehind = 0; 285 if (rahead) 286 *rahead = 0; |
|
| 282 } 283 284 return (error); 285} 286 287static int 288old_dev_pager_fault(vm_object_t object, vm_ooffset_t offset, int prot, 289 vm_page_t *mres) --- 133 unchanged lines hidden --- | 287 } 288 289 return (error); 290} 291 292static int 293old_dev_pager_fault(vm_object_t object, vm_ooffset_t offset, int prot, 294 vm_page_t *mres) --- 133 unchanged lines hidden --- |