xnu-344.21.73.tar.gz

[apple/xnu.git] / bsd / kern / uipc_mbuf.c

diff --git a/bsd/kern/uipc_mbuf.c b/bsd/kern/uipc_mbuf.c
index 0eed25410d5b559b8001fd894d630b457e556572..5c6bc12ec566c449cbad322f7041eb53b2719ca7 100644 (file)
--- a/bsd/kern/uipc_mbuf.c
+++ b/bsd/kern/uipc_mbuf.c
@@ -3,19 +3,22 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -79,10 +82,14 @@
 #include <kern/kern_types.h>
 #include <kern/sched_prim.h>
 
+#include <IOKit/IOMapper.h>
+
 #define _MCLREF(p)       (++mclrefcnt[mtocl(p)])
 #define _MCLUNREF(p)     (--mclrefcnt[mtocl(p)] == 0)
 
-extern  kernel_pmap;    /* The kernel's pmap */
+extern pmap_t kernel_pmap;    /* The kernel's pmap */
+/* kernel translater */
+extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
 
 decl_simple_lock_data(, mbuf_slock);
 struct mbuf    *mfree;         /* mbuf free list */
@@ -92,6 +99,7 @@ int           m_want;         /* sleepers on mbufs */
 extern int     nmbclusters;    /* max number of mapped clusters */
 short          *mclrefcnt;     /* mapped cluster reference counts */
 int             *mcl_paddr;
+static ppnum_t mcl_paddr_base; /* Handle returned by IOMapper::iovmAlloc() */
 union mcluster         *mclfree;       /* mapped cluster free list */
 int            max_linkhdr;    /* largest link-level header */
 int            max_protohdr;   /* largest protocol header */
@@ -165,10 +173,11 @@ mbinit()
 {
        int s,m;
        int initmcl = 32;
+        int mcl_pages;
 
        if (nclpp)
                return;
-       nclpp = round_page(MCLBYTES) / MCLBYTES;        /* see mbufgc() */
+       nclpp = round_page_32(MCLBYTES) / MCLBYTES;     /* see mbufgc() */
        if (nclpp < 1) nclpp = 1;
        MBUF_LOCKINIT();
 //     NETISR_LOCKINIT();
@@ -188,11 +197,14 @@ mbinit()
        for (m = 0; m < nmbclusters; m++)
                mclrefcnt[m] = -1;
 
-       MALLOC(mcl_paddr, int *, (nmbclusters/(PAGE_SIZE/CLBYTES)) * sizeof (int),
-                                       M_TEMP, M_WAITOK);
+        /* Calculate the number of pages assigned to the cluster pool */
+        mcl_pages = nmbclusters/(PAGE_SIZE/CLBYTES);
+       MALLOC(mcl_paddr, int *, mcl_pages * sizeof(int), M_TEMP, M_WAITOK);
        if (mcl_paddr == 0)
                panic("mbinit1");
-       bzero((char *)mcl_paddr, (nmbclusters/(PAGE_SIZE/CLBYTES)) * sizeof (int));
+        /* Register with the I/O Bus mapper */
+        mcl_paddr_base = IOMapperIOVMAlloc(mcl_pages);
+       bzero((char *)mcl_paddr, mcl_pages * sizeof(int));
 
        embutl = (union mcluster *)((unsigned char *)mbutl + (nmbclusters * MCLBYTES));
 
@@ -233,11 +245,11 @@ m_clalloc(ncl, nowait)
 
        if (ncl < i) 
                ncl = i;
-       size = round_page(ncl * MCLBYTES);
+       size = round_page_32(ncl * MCLBYTES);
        mcl = (union mcluster *)kmem_mb_alloc(mb_map, size);
 
        if (mcl == 0 && ncl > 1) {
-               size = round_page(MCLBYTES); /* Try for 1 if failed */
+               size = round_page_32(MCLBYTES); /* Try for 1 if failed */
                mcl = (union mcluster *)kmem_mb_alloc(mb_map, size);
        }
 
@@ -247,8 +259,19 @@ m_clalloc(ncl, nowait)
                for (i = 0; i < ncl; i++) {
                        if (++mclrefcnt[mtocl(mcl)] != 0)
                                panic("m_clalloc already there");
-                       if (((int)mcl & PAGE_MASK) == 0)
-                               mcl_paddr[((char *)mcl - (char *)mbutl)/PAGE_SIZE] = pmap_extract(kernel_pmap, (char *)mcl);
+                       if (((int)mcl & PAGE_MASK) == 0) {
+                                ppnum_t offset = ((char *)mcl - (char *)mbutl)/PAGE_SIZE;
+                                ppnum_t new_page = pmap_find_phys(kernel_pmap, (vm_address_t) mcl);
+
+                                /*
+                                 * In the case of no mapper being available
+                                 * the following code nops and returns the
+                                 * input page, if there is a mapper the I/O
+                                 * page appropriate is returned.
+                                 */
+                                new_page = IOMapperInsertPage(mcl_paddr_base, offset, new_page);
+                               mcl_paddr[offset] = new_page << 12;
+                        }
 
                        mcl->mcl_next = mclfree;
                        mclfree = mcl++;