Author: nwhitehorn
Date: Fri Jan 19 22:17:13 2018
New Revision: 328178
URL: https://svnweb.freebsd.org/changeset/base/328178
Log:
Define PHYS_TO_DMAP() and DMAP_TO_PHYS() as panics on the architectures
(i386 and arm) that never implement them. This allows the removal of
#ifdef PHYS_TO_DMAP on code otherwise protected by a runtime check on
PMAP_HAS_DMAP. It also fixes the build on ARM and i386 after I forgot an
#ifdef in r328168.
Reported by: Milan Obuch
Pointy hat to: me
Modified:
head/sys/arm/include/vmparam.h
head/sys/compat/linuxkpi/common/src/linux_page.c
head/sys/i386/include/vmparam.h
head/sys/sys/sf_buf.h
Modified: head/sys/arm/include/vmparam.h
==============================================================================
--- head/sys/arm/include/vmparam.h Fri Jan 19 22:10:29 2018
(r328177)
+++ head/sys/arm/include/vmparam.h Fri Jan 19 22:17:13 2018
(r328178)
@@ -188,6 +188,8 @@ extern vm_offset_t vm_max_kernel_address;
#define SFBUF_MAP
#define PMAP_HAS_DMAP 0
+#define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; })
+#define DMAP_TO_PHYS(x) ({ panic("No direct map exists"); 0; })
#define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH
Modified: head/sys/compat/linuxkpi/common/src/linux_page.c
==============================================================================
--- head/sys/compat/linuxkpi/common/src/linux_page.c Fri Jan 19 22:10:29
2018 (r328177)
+++ head/sys/compat/linuxkpi/common/src/linux_page.c Fri Jan 19 22:17:13
2018 (r328178)
@@ -68,12 +68,8 @@ linux_page_address(struct page *page)
{
if (page->object != kmem_object && page->object != kernel_object) {
-#ifdef PHYS_TO_DMAP
return (PMAP_HAS_DMAP ?
((void *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(page))) : NULL);
-#else
- return (NULL);
-#endif
}
return ((void *)(uintptr_t)(VM_MIN_KERNEL_ADDRESS +
IDX_TO_OFF(page->pindex)));
@@ -82,66 +78,65 @@ linux_page_address(struct page *page)
vm_page_t
linux_alloc_pages(gfp_t flags, unsigned int order)
{
-#ifdef PHYS_TO_DMAP
- KASSERT(PMAP_HAS_DMAP, ("Direct map unavailable"));
- unsigned long npages = 1UL << order;
- int req = (flags & M_ZERO) ? (VM_ALLOC_ZERO | VM_ALLOC_NOOBJ |
- VM_ALLOC_NORMAL) : (VM_ALLOC_NOOBJ | VM_ALLOC_NORMAL);
vm_page_t page;
- if (order == 0 && (flags & GFP_DMA32) == 0) {
- page = vm_page_alloc(NULL, 0, req);
- if (page == NULL)
- return (NULL);
- } else {
- vm_paddr_t pmax = (flags & GFP_DMA32) ?
- BUS_SPACE_MAXADDR_32BIT : BUS_SPACE_MAXADDR;
-retry:
- page = vm_page_alloc_contig(NULL, 0, req,
- npages, 0, pmax, PAGE_SIZE, 0, VM_MEMATTR_DEFAULT);
+ if (PMAP_HAS_DMAP) {
+ unsigned long npages = 1UL << order;
+ int req = (flags & M_ZERO) ? (VM_ALLOC_ZERO | VM_ALLOC_NOOBJ |
+ VM_ALLOC_NORMAL) : (VM_ALLOC_NOOBJ | VM_ALLOC_NORMAL);
- if (page == NULL) {
- if (flags & M_WAITOK) {
- if (!vm_page_reclaim_contig(req,
- npages, 0, pmax, PAGE_SIZE, 0)) {
- VM_WAIT;
+ if (order == 0 && (flags & GFP_DMA32) == 0) {
+ page = vm_page_alloc(NULL, 0, req);
+ if (page == NULL)
+ return (NULL);
+ } else {
+ vm_paddr_t pmax = (flags & GFP_DMA32) ?
+ BUS_SPACE_MAXADDR_32BIT : BUS_SPACE_MAXADDR;
+ retry:
+ page = vm_page_alloc_contig(NULL, 0, req,
+ npages, 0, pmax, PAGE_SIZE, 0, VM_MEMATTR_DEFAULT);
+
+ if (page == NULL) {
+ if (flags & M_WAITOK) {
+ if (!vm_page_reclaim_contig(req,
+ npages, 0, pmax, PAGE_SIZE, 0)) {
+ VM_WAIT;
+ }
+ flags &= ~M_WAITOK;
+ goto retry;
}
- flags &= ~M_WAITOK;
- goto retry;
+ return (NULL);
}
- return (NULL);
}
- }
- if (flags & M_ZERO) {
- unsigned long x;
+ if (flags & M_ZERO) {
+ unsigned long x;
- for (x = 0; x != npages; x++) {
- vm_page_t pgo = page + x;
+ for (x = 0; x != npages; x++) {
+ vm_page_t pgo = page + x;
- if ((pgo->flags & PG_ZERO) == 0)
- pmap_zero_page(pgo);
+ if ((pgo->flags & PG_ZERO) == 0)
+ pmap_zero_page(pgo);
+ }
}
- }
-#else
- vm_offset_t vaddr;
- vm_page_t page;
+ } else {
+ vm_offset_t vaddr;
- vaddr = linux_alloc_kmem(flags, order);
- if (vaddr == 0)
- return (NULL);
+ vaddr = linux_alloc_kmem(flags, order);
+ if (vaddr == 0)
+ return (NULL);
- page = PHYS_TO_VM_PAGE(vtophys((void *)vaddr));
+ page = PHYS_TO_VM_PAGE(vtophys((void *)vaddr));
- KASSERT(vaddr == (vm_offset_t)page_address(page),
- ("Page address mismatch"));
-#endif
+ KASSERT(vaddr == (vm_offset_t)page_address(page),
+ ("Page address mismatch"));
+ }
+
return (page);
}
void
linux_free_pages(vm_page_t page, unsigned int order)
{
-#ifdef PHYS_TO_DMAP
if (PMAP_HAS_DMAP) {
unsigned long npages = 1UL << order;
unsigned long x;
@@ -154,15 +149,12 @@ linux_free_pages(vm_page_t page, unsigned int order)
vm_page_unlock(pgo);
}
} else {
-#endif
vm_offset_t vaddr;
vaddr = (vm_offset_t)page_address(page);
linux_free_kmem(vaddr, order);
-#ifdef PHYS_TO_DMAP
}
-#endif
}
vm_offset_t
Modified: head/sys/i386/include/vmparam.h
==============================================================================
--- head/sys/i386/include/vmparam.h Fri Jan 19 22:10:29 2018
(r328177)
+++ head/sys/i386/include/vmparam.h Fri Jan 19 22:17:13 2018
(r328178)
@@ -203,5 +203,7 @@
#define SFBUF_PROCESS_PAGE
#define PMAP_HAS_DMAP 0
+#define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; })
+#define DMAP_TO_PHYS(x) ({ panic("No direct map exists"); 0; })
#endif /* _MACHINE_VMPARAM_H_ */
Modified: head/sys/sys/sf_buf.h
==============================================================================
--- head/sys/sys/sf_buf.h Fri Jan 19 22:10:29 2018 (r328177)
+++ head/sys/sys/sf_buf.h Fri Jan 19 22:17:13 2018 (r328178)
@@ -115,10 +115,8 @@ void sf_buf_ref(struct sf_buf *);
static inline vm_offset_t
sf_buf_kva(struct sf_buf *sf)
{
-#ifdef PMAP_HAS_DMAP
if (PMAP_HAS_DMAP)
return (PHYS_TO_DMAP(VM_PAGE_TO_PHYS((vm_page_t)sf)));
-#endif
return (sf->kva);
}
@@ -126,10 +124,8 @@ sf_buf_kva(struct sf_buf *sf)
static inline vm_page_t
sf_buf_page(struct sf_buf *sf)
{
-#ifdef PMAP_HAS_DMAP
if (PMAP_HAS_DMAP)
return ((vm_page_t)sf);
-#endif
return (sf->m);
}
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