[PATCH] powerpc: rework dma-noncoherent to use generic vmap/vunmap functions
Ilya Yanok
yanok at emcraft.com
Fri Jan 9 23:58:35 EST 2009
This patch rewrites consistent dma allocations support to use vmalloc
layer to allocate virtual memory space from vmalloc pool and get rid
of CONFIG_CONSISTENT_{START,SIZE}.
Signed-off-by: Ilya Yanok <yanok at emcraft.com>
---
arch/powerpc/Kconfig | 25 --
arch/powerpc/configs/40x/acadia_defconfig | 2 -
arch/powerpc/configs/40x/ep405_defconfig | 2 -
arch/powerpc/configs/40x/hcu4_defconfig | 2 -
arch/powerpc/configs/40x/kilauea_defconfig | 2 -
arch/powerpc/configs/40x/makalu_defconfig | 2 -
arch/powerpc/configs/40x/virtex_defconfig | 2 -
arch/powerpc/configs/40x/walnut_defconfig | 2 -
arch/powerpc/configs/44x/arches_defconfig | 2 -
arch/powerpc/configs/44x/bamboo_defconfig | 2 -
arch/powerpc/configs/44x/canyonlands_defconfig | 2 -
arch/powerpc/configs/44x/ebony_defconfig | 2 -
arch/powerpc/configs/44x/katmai_defconfig | 2 -
arch/powerpc/configs/44x/rainier_defconfig | 2 -
arch/powerpc/configs/44x/sam440ep_defconfig | 2 -
arch/powerpc/configs/44x/sequoia_defconfig | 2 -
arch/powerpc/configs/44x/taishan_defconfig | 2 -
arch/powerpc/configs/44x/virtex5_defconfig | 2 -
arch/powerpc/configs/44x/warp_defconfig | 2 -
arch/powerpc/configs/adder875_defconfig | 2 -
arch/powerpc/configs/c2k_defconfig | 2 -
arch/powerpc/configs/ep88xc_defconfig | 2 -
arch/powerpc/configs/mgsuvd_defconfig | 2 -
arch/powerpc/configs/mpc866_ads_defconfig | 2 -
arch/powerpc/configs/mpc885_ads_defconfig | 2 -
arch/powerpc/configs/ppc40x_defconfig | 2 -
arch/powerpc/configs/ppc44x_defconfig | 2 -
arch/powerpc/configs/prpmc2800_defconfig | 2 -
arch/powerpc/lib/dma-noncoherent.c | 278 +++--------------------
29 files changed, 37 insertions(+), 320 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 525c13a..a451a06 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -777,31 +777,6 @@ config TASK_SIZE
default "0x80000000" if PPC_PREP || PPC_8xx
default "0xc0000000"
-config CONSISTENT_START_BOOL
- bool "Set custom consistent memory pool address"
- depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
- help
- This option allows you to set the base virtual address
- of the consistent memory pool. This pool of virtual
- memory is used to make consistent memory allocations.
-
-config CONSISTENT_START
- hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
- default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
- default "0xff100000" if NOT_COHERENT_CACHE
-
-config CONSISTENT_SIZE_BOOL
- bool "Set custom consistent memory pool size"
- depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
- help
- This option allows you to set the size of the
- consistent memory pool. This pool of virtual memory
- is used to make consistent memory allocations.
-
-config CONSISTENT_SIZE
- hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
- default "0x00200000" if NOT_COHERENT_CACHE
-
config PIN_TLB
bool "Pinned Kernel TLBs (860 ONLY)"
depends on ADVANCED_OPTIONS && 8xx
diff --git a/arch/powerpc/configs/40x/acadia_defconfig b/arch/powerpc/configs/40x/acadia_defconfig
index 25572cc..ea5d89c 100644
--- a/arch/powerpc/configs/40x/acadia_defconfig
+++ b/arch/powerpc/configs/40x/acadia_defconfig
@@ -265,8 +265,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/40x/ep405_defconfig b/arch/powerpc/configs/40x/ep405_defconfig
index b80ba7a..1f3ebea 100644
--- a/arch/powerpc/configs/40x/ep405_defconfig
+++ b/arch/powerpc/configs/40x/ep405_defconfig
@@ -267,8 +267,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/40x/hcu4_defconfig b/arch/powerpc/configs/40x/hcu4_defconfig
index 45dcb82..bfb010d 100644
--- a/arch/powerpc/configs/40x/hcu4_defconfig
+++ b/arch/powerpc/configs/40x/hcu4_defconfig
@@ -265,8 +265,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/40x/kilauea_defconfig b/arch/powerpc/configs/40x/kilauea_defconfig
index e2f3695..40e181f 100644
--- a/arch/powerpc/configs/40x/kilauea_defconfig
+++ b/arch/powerpc/configs/40x/kilauea_defconfig
@@ -265,8 +265,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/40x/makalu_defconfig b/arch/powerpc/configs/40x/makalu_defconfig
index 413c778..bb2c4ae 100644
--- a/arch/powerpc/configs/40x/makalu_defconfig
+++ b/arch/powerpc/configs/40x/makalu_defconfig
@@ -265,8 +265,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/40x/virtex_defconfig b/arch/powerpc/configs/40x/virtex_defconfig
index 9a9350d..d082d98 100644
--- a/arch/powerpc/configs/40x/virtex_defconfig
+++ b/arch/powerpc/configs/40x/virtex_defconfig
@@ -273,8 +273,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/40x/walnut_defconfig b/arch/powerpc/configs/40x/walnut_defconfig
index 5820e0a..c1c37eb 100644
--- a/arch/powerpc/configs/40x/walnut_defconfig
+++ b/arch/powerpc/configs/40x/walnut_defconfig
@@ -268,8 +268,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/arches_defconfig b/arch/powerpc/configs/44x/arches_defconfig
index 082158d..2784aa4 100644
--- a/arch/powerpc/configs/44x/arches_defconfig
+++ b/arch/powerpc/configs/44x/arches_defconfig
@@ -272,8 +272,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/bamboo_defconfig b/arch/powerpc/configs/44x/bamboo_defconfig
index f47c2f3..4821b4f 100644
--- a/arch/powerpc/configs/44x/bamboo_defconfig
+++ b/arch/powerpc/configs/44x/bamboo_defconfig
@@ -276,8 +276,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/canyonlands_defconfig b/arch/powerpc/configs/44x/canyonlands_defconfig
index 0694756..be68259 100644
--- a/arch/powerpc/configs/44x/canyonlands_defconfig
+++ b/arch/powerpc/configs/44x/canyonlands_defconfig
@@ -272,8 +272,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/ebony_defconfig b/arch/powerpc/configs/44x/ebony_defconfig
index c993757..8e0ce20 100644
--- a/arch/powerpc/configs/44x/ebony_defconfig
+++ b/arch/powerpc/configs/44x/ebony_defconfig
@@ -274,8 +274,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/katmai_defconfig b/arch/powerpc/configs/44x/katmai_defconfig
index e326ee8..d1767b4 100644
--- a/arch/powerpc/configs/44x/katmai_defconfig
+++ b/arch/powerpc/configs/44x/katmai_defconfig
@@ -270,8 +270,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/rainier_defconfig b/arch/powerpc/configs/44x/rainier_defconfig
index 927f829..fb1309f 100644
--- a/arch/powerpc/configs/44x/rainier_defconfig
+++ b/arch/powerpc/configs/44x/rainier_defconfig
@@ -274,8 +274,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/sam440ep_defconfig b/arch/powerpc/configs/44x/sam440ep_defconfig
index 15f48e0..79ded88 100644
--- a/arch/powerpc/configs/44x/sam440ep_defconfig
+++ b/arch/powerpc/configs/44x/sam440ep_defconfig
@@ -275,8 +275,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/sequoia_defconfig b/arch/powerpc/configs/44x/sequoia_defconfig
index 562beea..ef65b9f 100644
--- a/arch/powerpc/configs/44x/sequoia_defconfig
+++ b/arch/powerpc/configs/44x/sequoia_defconfig
@@ -276,8 +276,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/taishan_defconfig b/arch/powerpc/configs/44x/taishan_defconfig
index 427bb6a..6e97ae9 100644
--- a/arch/powerpc/configs/44x/taishan_defconfig
+++ b/arch/powerpc/configs/44x/taishan_defconfig
@@ -274,8 +274,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/virtex5_defconfig b/arch/powerpc/configs/44x/virtex5_defconfig
index 7513d36..5b2ccd6 100644
--- a/arch/powerpc/configs/44x/virtex5_defconfig
+++ b/arch/powerpc/configs/44x/virtex5_defconfig
@@ -278,8 +278,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/44x/warp_defconfig b/arch/powerpc/configs/44x/warp_defconfig
index 59cbd27..126be06 100644
--- a/arch/powerpc/configs/44x/warp_defconfig
+++ b/arch/powerpc/configs/44x/warp_defconfig
@@ -266,8 +266,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/adder875_defconfig b/arch/powerpc/configs/adder875_defconfig
index 024f279..f5e50c0 100644
--- a/arch/powerpc/configs/adder875_defconfig
+++ b/arch/powerpc/configs/adder875_defconfig
@@ -265,8 +265,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0x80000000
-CONFIG_CONSISTENT_START=0xfd000000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/c2k_defconfig b/arch/powerpc/configs/c2k_defconfig
index 5078594..b877f07 100644
--- a/arch/powerpc/configs/c2k_defconfig
+++ b/arch/powerpc/configs/c2k_defconfig
@@ -307,8 +307,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/ep88xc_defconfig b/arch/powerpc/configs/ep88xc_defconfig
index 870d289..8aacae7 100644
--- a/arch/powerpc/configs/ep88xc_defconfig
+++ b/arch/powerpc/configs/ep88xc_defconfig
@@ -265,8 +265,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0x80000000
-CONFIG_CONSISTENT_START=0xfd000000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/mgsuvd_defconfig b/arch/powerpc/configs/mgsuvd_defconfig
index fbaa67f..0da7b58 100644
--- a/arch/powerpc/configs/mgsuvd_defconfig
+++ b/arch/powerpc/configs/mgsuvd_defconfig
@@ -262,8 +262,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0x80000000
-CONFIG_CONSISTENT_START=0xfd000000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/mpc866_ads_defconfig b/arch/powerpc/configs/mpc866_ads_defconfig
index 8272b1a..e16bd69 100644
--- a/arch/powerpc/configs/mpc866_ads_defconfig
+++ b/arch/powerpc/configs/mpc866_ads_defconfig
@@ -262,8 +262,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0x80000000
-CONFIG_CONSISTENT_START=0xfd000000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/mpc885_ads_defconfig b/arch/powerpc/configs/mpc885_ads_defconfig
index a4283b6..0937771 100644
--- a/arch/powerpc/configs/mpc885_ads_defconfig
+++ b/arch/powerpc/configs/mpc885_ads_defconfig
@@ -272,8 +272,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0x80000000
-CONFIG_CONSISTENT_START=0xfd000000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/ppc40x_defconfig b/arch/powerpc/configs/ppc40x_defconfig
index 4256e2c..0cbb6c3 100644
--- a/arch/powerpc/configs/ppc40x_defconfig
+++ b/arch/powerpc/configs/ppc40x_defconfig
@@ -275,8 +275,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/ppc44x_defconfig b/arch/powerpc/configs/ppc44x_defconfig
index cfc94cf..54e5583 100644
--- a/arch/powerpc/configs/ppc44x_defconfig
+++ b/arch/powerpc/configs/ppc44x_defconfig
@@ -286,8 +286,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/configs/prpmc2800_defconfig b/arch/powerpc/configs/prpmc2800_defconfig
index 6046dc0..bb61e21 100644
--- a/arch/powerpc/configs/prpmc2800_defconfig
+++ b/arch/powerpc/configs/prpmc2800_defconfig
@@ -272,8 +272,6 @@ CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xc0000000
-CONFIG_CONSISTENT_START=0xff100000
-CONFIG_CONSISTENT_SIZE=0x00200000
CONFIG_NET=y
#
diff --git a/arch/powerpc/lib/dma-noncoherent.c b/arch/powerpc/lib/dma-noncoherent.c
index 31734c0..f6c932f 100644
--- a/arch/powerpc/lib/dma-noncoherent.c
+++ b/arch/powerpc/lib/dma-noncoherent.c
@@ -29,121 +29,11 @@
#include <linux/types.h>
#include <linux/highmem.h>
#include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
#include <asm/tlbflush.h>
/*
- * This address range defaults to a value that is safe for all
- * platforms which currently set CONFIG_NOT_COHERENT_CACHE. It
- * can be further configured for specific applications under
- * the "Advanced Setup" menu. -Matt
- */
-#define CONSISTENT_BASE (CONFIG_CONSISTENT_START)
-#define CONSISTENT_END (CONFIG_CONSISTENT_START + CONFIG_CONSISTENT_SIZE)
-#define CONSISTENT_OFFSET(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PAGE_SHIFT)
-
-/*
- * This is the page table (2MB) covering uncached, DMA consistent allocations
- */
-static pte_t *consistent_pte;
-static DEFINE_SPINLOCK(consistent_lock);
-
-/*
- * VM region handling support.
- *
- * This should become something generic, handling VM region allocations for
- * vmalloc and similar (ioremap, module space, etc).
- *
- * I envisage vmalloc()'s supporting vm_struct becoming:
- *
- * struct vm_struct {
- * struct vm_region region;
- * unsigned long flags;
- * struct page **pages;
- * unsigned int nr_pages;
- * unsigned long phys_addr;
- * };
- *
- * get_vm_area() would then call vm_region_alloc with an appropriate
- * struct vm_region head (eg):
- *
- * struct vm_region vmalloc_head = {
- * .vm_list = LIST_HEAD_INIT(vmalloc_head.vm_list),
- * .vm_start = VMALLOC_START,
- * .vm_end = VMALLOC_END,
- * };
- *
- * However, vmalloc_head.vm_start is variable (typically, it is dependent on
- * the amount of RAM found at boot time.) I would imagine that get_vm_area()
- * would have to initialise this each time prior to calling vm_region_alloc().
- */
-struct vm_region {
- struct list_head vm_list;
- unsigned long vm_start;
- unsigned long vm_end;
-};
-
-static struct vm_region consistent_head = {
- .vm_list = LIST_HEAD_INIT(consistent_head.vm_list),
- .vm_start = CONSISTENT_BASE,
- .vm_end = CONSISTENT_END,
-};
-
-static struct vm_region *
-vm_region_alloc(struct vm_region *head, size_t size, gfp_t gfp)
-{
- unsigned long addr = head->vm_start, end = head->vm_end - size;
- unsigned long flags;
- struct vm_region *c, *new;
-
- new = kmalloc(sizeof(struct vm_region), gfp);
- if (!new)
- goto out;
-
- spin_lock_irqsave(&consistent_lock, flags);
-
- list_for_each_entry(c, &head->vm_list, vm_list) {
- if ((addr + size) < addr)
- goto nospc;
- if ((addr + size) <= c->vm_start)
- goto found;
- addr = c->vm_end;
- if (addr > end)
- goto nospc;
- }
-
- found:
- /*
- * Insert this entry _before_ the one we found.
- */
- list_add_tail(&new->vm_list, &c->vm_list);
- new->vm_start = addr;
- new->vm_end = addr + size;
-
- spin_unlock_irqrestore(&consistent_lock, flags);
- return new;
-
- nospc:
- spin_unlock_irqrestore(&consistent_lock, flags);
- kfree(new);
- out:
- return NULL;
-}
-
-static struct vm_region *vm_region_find(struct vm_region *head, unsigned long addr)
-{
- struct vm_region *c;
-
- list_for_each_entry(c, &head->vm_list, vm_list) {
- if (c->vm_start == addr)
- goto out;
- }
- c = NULL;
- out:
- return c;
-}
-
-/*
* Allocate DMA-coherent memory space and return both the kernel remapped
* virtual and bus address for that space.
*/
@@ -151,19 +41,17 @@ void *
__dma_alloc_coherent(size_t size, dma_addr_t *handle, gfp_t gfp)
{
struct page *page;
- struct vm_region *c;
unsigned long order;
+ void *v;
+ int i;
+ struct page *pages[PAGE_ALIGN(size)>>PAGE_SHIFT];
+ struct page *end;
u64 mask = 0x00ffffff, limit; /* ISA default */
- if (!consistent_pte) {
- printk(KERN_ERR "%s: not initialised\n", __func__);
- dump_stack();
- return NULL;
- }
-
+ BUG_ON(!mem_init_done);
size = PAGE_ALIGN(size);
limit = (mask + 1) & ~mask;
- if ((limit && size >= limit) || size >= (CONSISTENT_END - CONSISTENT_BASE)) {
+ if (limit && size >= limit) {
printk(KERN_WARNING "coherent allocation too big (requested %#x mask %#Lx)\n",
size, mask);
return NULL;
@@ -178,6 +66,8 @@ __dma_alloc_coherent(size_t size, dma_addr_t *handle, gfp_t gfp)
if (!page)
goto no_page;
+ end = page + (1 << order);
+
/*
* Invalidate any data that might be lurking in the
* kernel direct-mapped region for device DMA.
@@ -188,45 +78,34 @@ __dma_alloc_coherent(size_t size, dma_addr_t *handle, gfp_t gfp)
flush_dcache_range(kaddr, kaddr + size);
}
+ split_page(page, order);
+
/*
- * Allocate a virtual address in the consistent mapping region.
+ * Set the "dma handle"
*/
- c = vm_region_alloc(&consistent_head, size,
- gfp & ~(__GFP_DMA | __GFP_HIGHMEM));
- if (c) {
- unsigned long vaddr = c->vm_start;
- pte_t *pte = consistent_pte + CONSISTENT_OFFSET(vaddr);
- struct page *end = page + (1 << order);
-
- split_page(page, order);
-
- /*
- * Set the "dma handle"
- */
- *handle = page_to_phys(page);
-
- do {
- BUG_ON(!pte_none(*pte));
-
- SetPageReserved(page);
- set_pte_at(&init_mm, vaddr,
- pte, mk_pte(page, pgprot_noncached(PAGE_KERNEL)));
- page++;
- pte++;
- vaddr += PAGE_SIZE;
- } while (size -= PAGE_SIZE);
+ *handle = page_to_phys(page);
+ for (i = 0; i < size>>PAGE_SHIFT; i++)
+ pages[i] = page + i;
+ v = vmap(pages, size>>PAGE_SHIFT, VM_IOREMAP,
+ pgprot_noncached(PAGE_KERNEL));
+ if (!v)
+ goto out;
- /*
- * Free the otherwise unused pages.
- */
- while (page < end) {
- __free_page(page);
- page++;
- }
+ do {
+ SetPageReserved(page);
+ page++;
+ } while (size -= PAGE_SIZE);
- return (void *)c->vm_start;
+ /*
+ * Free the otherwise unused pages.
+ */
+ while (page < end) {
+ __free_page(page);
+ page++;
}
+ return v;
+ out:
if (page)
__free_pages(page, order);
no_page:
@@ -239,105 +118,22 @@ EXPORT_SYMBOL(__dma_alloc_coherent);
*/
void __dma_free_coherent(size_t size, void *vaddr)
{
- struct vm_region *c;
- unsigned long flags, addr;
- pte_t *ptep;
+ struct page *page;
size = PAGE_ALIGN(size);
+ page = vmalloc_to_page(vaddr);
- spin_lock_irqsave(&consistent_lock, flags);
+ vunmap(vaddr);
- c = vm_region_find(&consistent_head, (unsigned long)vaddr);
- if (!c)
- goto no_area;
-
- if ((c->vm_end - c->vm_start) != size) {
- printk(KERN_ERR "%s: freeing wrong coherent size (%ld != %d)\n",
- __func__, c->vm_end - c->vm_start, size);
- dump_stack();
- size = c->vm_end - c->vm_start;
- }
-
- ptep = consistent_pte + CONSISTENT_OFFSET(c->vm_start);
- addr = c->vm_start;
do {
- pte_t pte = ptep_get_and_clear(&init_mm, addr, ptep);
- unsigned long pfn;
-
- ptep++;
- addr += PAGE_SIZE;
-
- if (!pte_none(pte) && pte_present(pte)) {
- pfn = pte_pfn(pte);
-
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
- ClearPageReserved(page);
-
- __free_page(page);
- continue;
- }
- }
-
- printk(KERN_CRIT "%s: bad page in kernel page table\n",
- __func__);
+ ClearPageReserved(page);
+ __free_page(page);
+ page++;
} while (size -= PAGE_SIZE);
-
- flush_tlb_kernel_range(c->vm_start, c->vm_end);
-
- list_del(&c->vm_list);
-
- spin_unlock_irqrestore(&consistent_lock, flags);
-
- kfree(c);
- return;
-
- no_area:
- spin_unlock_irqrestore(&consistent_lock, flags);
- printk(KERN_ERR "%s: trying to free invalid coherent area: %p\n",
- __func__, vaddr);
- dump_stack();
}
EXPORT_SYMBOL(__dma_free_coherent);
/*
- * Initialise the consistent memory allocation.
- */
-static int __init dma_alloc_init(void)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
- int ret = 0;
-
- do {
- pgd = pgd_offset(&init_mm, CONSISTENT_BASE);
- pud = pud_alloc(&init_mm, pgd, CONSISTENT_BASE);
- pmd = pmd_alloc(&init_mm, pud, CONSISTENT_BASE);
- if (!pmd) {
- printk(KERN_ERR "%s: no pmd tables\n", __func__);
- ret = -ENOMEM;
- break;
- }
- WARN_ON(!pmd_none(*pmd));
-
- pte = pte_alloc_kernel(pmd, CONSISTENT_BASE);
- if (!pte) {
- printk(KERN_ERR "%s: no pte tables\n", __func__);
- ret = -ENOMEM;
- break;
- }
-
- consistent_pte = pte;
- } while (0);
-
- return ret;
-}
-
-core_initcall(dma_alloc_init);
-
-/*
* make an area consistent.
*/
void __dma_sync(void *vaddr, size_t size, int direction)
--
1.6.0.6
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