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ARM: use ARM_DMA_ZONE_SIZE to adjust the zone sizes 

Rather than each platform providing its own function to adjust the
zone sizes, use the new ARM_DMA_ZONE_SIZE definition to perform this
adjustment.  This ensures that the actual DMA zone size and the
ISA_DMA_THRESHOLD/MAX_DMA_ADDRESS definitions are consistent with
each other, and moves this complexity out of the platform code.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-05-11 15:39:00 +01:00
parent 2fb3ec5c95
commit be20902ba6
12 changed files with 25 additions and 144 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/common/sa1111.c
View File

@ -185,14 +185,6 @@ static struct sa1111_dev_info sa1111_devices[] = {
},
};
void __init sa1111_adjust_zones(unsigned long *size, unsigned long *holes)
{
unsigned int sz = SZ_1M >> PAGE_SHIFT;
size[1] = size[0] - sz;
size[0] = sz;
}
/*
* SA1111 interrupt support. Since clearing an IRQ while there are
* active IRQs causes the interrupt output to pulse, the upper levels

6
arch/arm/include/asm/memory.h
View File

@ -215,12 +215,6 @@ static inline unsigned long __phys_to_virt(unsigned long x)
#define ISA_DMA_THRESHOLD (PHYS_OFFSET + ARM_DMA_ZONE_SIZE - 1)
#endif
#ifndef arch_adjust_zones
#define arch_adjust_zones(size,holes) do { } while (0)
#elif !defined(CONFIG_ZONE_DMA)
#error "custom arch_adjust_zones() requires CONFIG_ZONE_DMA"
#endif
/*
* PFNs are used to describe any physical page; this means
* PFN 0 == physical address 0.

15
arch/arm/mach-davinci/include/mach/memory.h
View File

@ -41,26 +41,11 @@
*/
#define CONSISTENT_DMA_SIZE (14<<20)
#ifndef __ASSEMBLY__
/*
* Restrict DMA-able region to workaround silicon bug. The bug
* restricts buffers available for DMA to video hardware to be
* below 128M
*/
static inline void
__arch_adjust_zones(unsigned long *size, unsigned long *holes)
{
unsigned int sz = (128<<20) >> PAGE_SHIFT;
size[1] = size[0] - sz;
size[0] = sz;
}
#define arch_adjust_zones(zone_size, holes) \
if ((meminfo.bank[0].size >> 20) > 128) __arch_adjust_zones(zone_size, holes)
#define ARM_DMA_ZONE_SIZE SZ_128M
#endif
#endif /* __ASM_ARCH_MEMORY_H */

23
arch/arm/mach-ixp4xx/common-pci.c
View File

@ -342,29 +342,6 @@ int dma_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size)
return (dev->bus == &pci_bus_type ) && ((dma_addr + size) >= SZ_64M);
}
/*
* Only first 64MB of memory can be accessed via PCI.
* We use GFP_DMA to allocate safe buffers to do map/unmap.
* This is really ugly and we need a better way of specifying
* DMA-capable regions of memory.
*/
void __init ixp4xx_adjust_zones(unsigned long *zone_size,
unsigned long *zhole_size)
{
unsigned int sz = SZ_64M >> PAGE_SHIFT;
/*
* Only adjust if > 64M on current system
*/
if (zone_size[0] <= sz)
return;
zone_size[1] = zone_size[0] - sz;
zone_size[0] = sz;
zhole_size[1] = zhole_size[0];
zhole_size[0] = 0;
}
void __init ixp4xx_pci_preinit(void)
{
unsigned long cpuid = read_cpuid_id();

9
arch/arm/mach-ixp4xx/include/mach/memory.h
View File

@ -14,15 +14,8 @@
*/
#define PLAT_PHYS_OFFSET UL(0x00000000)
#if !defined(__ASSEMBLY__) && defined(CONFIG_PCI)
void ixp4xx_adjust_zones(unsigned long *size, unsigned long *holes);
#define arch_adjust_zones(size, holes) \
ixp4xx_adjust_zones(size, holes)
#ifdef CONFIG_PCI
#define ARM_DMA_ZONE_SIZE SZ_64M
#endif
#endif

27
arch/arm/mach-pxa/cm-x2xx-pci.c
View File

@ -29,33 +29,6 @@
unsigned long it8152_base_address;
static int cmx2xx_it8152_irq_gpio;
/*
* Only first 64MB of memory can be accessed via PCI.
* We use GFP_DMA to allocate safe buffers to do map/unmap.
* This is really ugly and we need a better way of specifying
* DMA-capable regions of memory.
*/
void __init cmx2xx_pci_adjust_zones(unsigned long *zone_size,
unsigned long *zhole_size)
{
unsigned int sz = SZ_64M >> PAGE_SHIFT;
if (machine_is_armcore()) {
pr_info("Adjusting zones for CM-X2XX\n");
/*
* Only adjust if > 64M on current system
*/
if (zone_size[0] <= sz)
return;
zone_size[1] = zone_size[0] - sz;
zone_size[0] = sz;
zhole_size[1] = zhole_size[0];
zhole_size[0] = 0;
}
}
static void cmx2xx_it8152_irq_demux(unsigned int irq, struct irq_desc *desc)
{
/* clear our parent irq */

7
arch/arm/mach-pxa/include/mach/memory.h
View File

@ -17,12 +17,7 @@
*/
#define PLAT_PHYS_OFFSET UL(0xa0000000)
#if !defined(__ASSEMBLY__) && defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
void cmx2xx_pci_adjust_zones(unsigned long *size, unsigned long *holes);
#define arch_adjust_zones(size, holes) \
cmx2xx_pci_adjust_zones(size, holes)
#if defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
#define ARM_DMA_ZONE_SIZE SZ_64M
#endif

19
arch/arm/mach-realview/core.c
View File

@ -56,25 +56,6 @@
#include "core.h"
#ifdef CONFIG_ZONE_DMA
/*
* Adjust the zones if there are restrictions for DMA access.
*/
void __init realview_adjust_zones(unsigned long *size, unsigned long *hole)
{
unsigned long dma_size = SZ_256M >> PAGE_SHIFT;
if (!machine_is_realview_pbx() || size[0] <= dma_size)
return;
size[ZONE_NORMAL] = size[0] - dma_size;
size[ZONE_DMA] = dma_size;
hole[ZONE_NORMAL] = hole[0];
hole[ZONE_DMA] = 0;
}
#endif
#define REALVIEW_FLASHCTRL (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)
static int realview_flash_init(void)

6
arch/arm/mach-realview/include/mach/memory.h
View File

@ -29,11 +29,7 @@
#define PLAT_PHYS_OFFSET UL(0x00000000)
#endif
#if !defined(__ASSEMBLY__) && defined(CONFIG_ZONE_DMA)
extern void realview_adjust_zones(unsigned long *size, unsigned long *hole);
#define arch_adjust_zones(size, hole) \
realview_adjust_zones(size, hole)
#ifdef CONFIG_ZONE_DMA
#define ARM_DMA_ZONE_SIZE SZ_256M
#endif

9
arch/arm/mach-sa1100/include/mach/memory.h
View File

@ -14,17 +14,8 @@
*/
#define PLAT_PHYS_OFFSET UL(0xc0000000)
#ifndef __ASSEMBLY__
#ifdef CONFIG_SA1111
void sa1111_adjust_zones(unsigned long *size, unsigned long *holes);
#define arch_adjust_zones(size, holes) \
sa1111_adjust_zones(size, holes)
#define ARM_DMA_ZONE_SIZE SZ_1M
#endif
#endif
/*

17
arch/arm/mach-shark/include/mach/memory.h
View File

@ -17,25 +17,8 @@
*/
#define PLAT_PHYS_OFFSET UL(0x08000000)
#ifndef __ASSEMBLY__
static inline void __arch_adjust_zones(unsigned long *zone_size, unsigned long *zhole_size)
{
/* Only the first 4 MB (=1024 Pages) are usable for DMA */
/* See dev / -> .properties in OpenFirmware. */
zone_size[1] = zone_size[0] - 1024;
zone_size[0] = 1024;
zhole_size[1] = zhole_size[0];
zhole_size[0] = 0;
}
#define arch_adjust_zones(size, holes) \
__arch_adjust_zones(size, holes)
#define ARM_DMA_ZONE_SIZE SZ_4M
#endif
/*
* Cache flushing area
*/

23
arch/arm/mm/init.c
View File

@ -201,6 +201,20 @@ static void __init arm_bootmem_init(unsigned long start_pfn,
}
}
#ifdef CONFIG_ZONE_DMA
static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole,
unsigned long dma_size)
{
if (size[0] <= dma_size)
return;
size[ZONE_NORMAL] = size[0] - dma_size;
size[ZONE_DMA] = dma_size;
hole[ZONE_NORMAL] = hole[0];
hole[ZONE_DMA] = 0;
}
#endif
static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
unsigned long max_high)
{
@ -243,11 +257,18 @@ static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
#endif
}
#ifdef ARM_DMA_ZONE_SIZE
#ifndef CONFIG_ZONE_DMA
#error ARM_DMA_ZONE_SIZE set but no DMA zone to limit allocations
#endif
/*
* Adjust the sizes according to any special requirements for
* this machine type.
*/
arch_adjust_zones(zone_size, zhole_size);
arm_adjust_dma_zone(zone_size, zhole_size,
ARM_DMA_ZONE_SIZE >> PAGE_SHIFT);
#endif
free_area_init_node(0, zone_size, min, zhole_size);
}