* [PATCH] arm: dma-mapping: add checking cma area initialized
@ 2014-05-22 4:38 ` Gioh Kim
0 siblings, 0 replies; 6+ messages in thread
From: Gioh Kim @ 2014-05-22 4:38 UTC (permalink / raw)
To: mina86, m.szyprowski, linux-mm, linux-kernel, linux-arm-kernel,
heesub.shin, mgorman, hannes
Cc: gunho.lee, chanho.min, gurugio, Gioh Kim, Joonsoo Kim
If CMA is turned on and CMA size is set to zero, kernel should
behave as if CMA was not enabled at compile time.
Every dma allocation should check existence of cma area
before requesting memory.
Signed-off-by: Gioh Kim <gioh.kim@lge.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
---
arch/arm/mm/dma-mapping.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 18e98df..9173a13 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -390,12 +390,13 @@ static int __init atomic_pool_init(void)
if (!pages)
goto no_pages;
- if (IS_ENABLED(CONFIG_DMA_CMA))
+ if (dev_get_cma_area(NULL))
ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page,
atomic_pool_init);
else
ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page,
atomic_pool_init);
+
if (ptr) {
int i;
@@ -701,7 +702,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
addr = __alloc_simple_buffer(dev, size, gfp, &page);
else if (!(gfp & __GFP_WAIT))
addr = __alloc_from_pool(size, &page);
- else if (!IS_ENABLED(CONFIG_DMA_CMA))
+ else if (!dev_get_cma_area(dev))
addr = __alloc_remap_buffer(dev, size, gfp, prot, &page, caller);
else
addr = __alloc_from_contiguous(dev, size, prot, &page, caller);
@@ -790,7 +791,7 @@ static void __arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
__dma_free_buffer(page, size);
} else if (__free_from_pool(cpu_addr, size)) {
return;
- } else if (!IS_ENABLED(CONFIG_DMA_CMA)) {
+ } else if (!dev_get_cma_area(dev)) {
__dma_free_remap(cpu_addr, size);
__dma_free_buffer(page, size);
} else {
--
1.7.9.5
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH] arm: dma-mapping: add checking cma area initialized
@ 2014-05-22 4:38 ` Gioh Kim
0 siblings, 0 replies; 6+ messages in thread
From: Gioh Kim @ 2014-05-22 4:38 UTC (permalink / raw)
To: mina86, m.szyprowski, linux-mm, linux-kernel, linux-arm-kernel,
heesub.shin, mgorman, hannes
Cc: gunho.lee, chanho.min, gurugio, Gioh Kim, Joonsoo Kim
If CMA is turned on and CMA size is set to zero, kernel should
behave as if CMA was not enabled at compile time.
Every dma allocation should check existence of cma area
before requesting memory.
Signed-off-by: Gioh Kim <gioh.kim@lge.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
---
arch/arm/mm/dma-mapping.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 18e98df..9173a13 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -390,12 +390,13 @@ static int __init atomic_pool_init(void)
if (!pages)
goto no_pages;
- if (IS_ENABLED(CONFIG_DMA_CMA))
+ if (dev_get_cma_area(NULL))
ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page,
atomic_pool_init);
else
ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page,
atomic_pool_init);
+
if (ptr) {
int i;
@@ -701,7 +702,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
addr = __alloc_simple_buffer(dev, size, gfp, &page);
else if (!(gfp & __GFP_WAIT))
addr = __alloc_from_pool(size, &page);
- else if (!IS_ENABLED(CONFIG_DMA_CMA))
+ else if (!dev_get_cma_area(dev))
addr = __alloc_remap_buffer(dev, size, gfp, prot, &page, caller);
else
addr = __alloc_from_contiguous(dev, size, prot, &page, caller);
@@ -790,7 +791,7 @@ static void __arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
__dma_free_buffer(page, size);
} else if (__free_from_pool(cpu_addr, size)) {
return;
- } else if (!IS_ENABLED(CONFIG_DMA_CMA)) {
+ } else if (!dev_get_cma_area(dev)) {
__dma_free_remap(cpu_addr, size);
__dma_free_buffer(page, size);
} else {
--
1.7.9.5
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH] arm: dma-mapping: add checking cma area initialized
2014-05-22 4:38 ` Gioh Kim
(?)
@ 2014-05-22 6:17 ` Marek Szyprowski
-1 siblings, 0 replies; 6+ messages in thread
From: Marek Szyprowski @ 2014-05-22 6:17 UTC (permalink / raw)
To: linux-arm-kernel
Hello,
On 2014-05-22 06:38, Gioh Kim wrote:
> If CMA is turned on and CMA size is set to zero, kernel should
> behave as if CMA was not enabled at compile time.
> Every dma allocation should check existence of cma area
> before requesting memory.
>
> Signed-off-by: Gioh Kim <gioh.kim@lge.com>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
> Acked-by: Michal Nazarewicz <mina86@mina86.com>
Thanks for this patch! The initial version was really ugly, but
this one really does what should be there from the begging.
I've applied this patch with redundant empty line add removed.
> ---
> arch/arm/mm/dma-mapping.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
> index 18e98df..9173a13 100644
> --- a/arch/arm/mm/dma-mapping.c
> +++ b/arch/arm/mm/dma-mapping.c
> @@ -390,12 +390,13 @@ static int __init atomic_pool_init(void)
> if (!pages)
> goto no_pages;
>
> - if (IS_ENABLED(CONFIG_DMA_CMA))
> + if (dev_get_cma_area(NULL))
> ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page,
> atomic_pool_init);
> else
> ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page,
> atomic_pool_init);
> +
> if (ptr) {
> int i;
>
> @@ -701,7 +702,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> addr = __alloc_simple_buffer(dev, size, gfp, &page);
> else if (!(gfp & __GFP_WAIT))
> addr = __alloc_from_pool(size, &page);
> - else if (!IS_ENABLED(CONFIG_DMA_CMA))
> + else if (!dev_get_cma_area(dev))
> addr = __alloc_remap_buffer(dev, size, gfp, prot, &page, caller);
> else
> addr = __alloc_from_contiguous(dev, size, prot, &page, caller);
> @@ -790,7 +791,7 @@ static void __arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
> __dma_free_buffer(page, size);
> } else if (__free_from_pool(cpu_addr, size)) {
> return;
> - } else if (!IS_ENABLED(CONFIG_DMA_CMA)) {
> + } else if (!dev_get_cma_area(dev)) {
> __dma_free_remap(cpu_addr, size);
> __dma_free_buffer(page, size);
> } else {
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] arm: dma-mapping: add checking cma area initialized
@ 2014-05-22 6:17 ` Marek Szyprowski
0 siblings, 0 replies; 6+ messages in thread
From: Marek Szyprowski @ 2014-05-22 6:17 UTC (permalink / raw)
To: Gioh Kim, mina86, linux-mm, linux-kernel, linux-arm-kernel,
heesub.shin, mgorman, hannes
Cc: gunho.lee, chanho.min, gurugio, Joonsoo Kim
Hello,
On 2014-05-22 06:38, Gioh Kim wrote:
> If CMA is turned on and CMA size is set to zero, kernel should
> behave as if CMA was not enabled at compile time.
> Every dma allocation should check existence of cma area
> before requesting memory.
>
> Signed-off-by: Gioh Kim <gioh.kim@lge.com>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
> Acked-by: Michal Nazarewicz <mina86@mina86.com>
Thanks for this patch! The initial version was really ugly, but
this one really does what should be there from the begging.
I've applied this patch with redundant empty line add removed.
> ---
> arch/arm/mm/dma-mapping.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
> index 18e98df..9173a13 100644
> --- a/arch/arm/mm/dma-mapping.c
> +++ b/arch/arm/mm/dma-mapping.c
> @@ -390,12 +390,13 @@ static int __init atomic_pool_init(void)
> if (!pages)
> goto no_pages;
>
> - if (IS_ENABLED(CONFIG_DMA_CMA))
> + if (dev_get_cma_area(NULL))
> ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page,
> atomic_pool_init);
> else
> ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page,
> atomic_pool_init);
> +
> if (ptr) {
> int i;
>
> @@ -701,7 +702,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> addr = __alloc_simple_buffer(dev, size, gfp, &page);
> else if (!(gfp & __GFP_WAIT))
> addr = __alloc_from_pool(size, &page);
> - else if (!IS_ENABLED(CONFIG_DMA_CMA))
> + else if (!dev_get_cma_area(dev))
> addr = __alloc_remap_buffer(dev, size, gfp, prot, &page, caller);
> else
> addr = __alloc_from_contiguous(dev, size, prot, &page, caller);
> @@ -790,7 +791,7 @@ static void __arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
> __dma_free_buffer(page, size);
> } else if (__free_from_pool(cpu_addr, size)) {
> return;
> - } else if (!IS_ENABLED(CONFIG_DMA_CMA)) {
> + } else if (!dev_get_cma_area(dev)) {
> __dma_free_remap(cpu_addr, size);
> __dma_free_buffer(page, size);
> } else {
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] arm: dma-mapping: add checking cma area initialized
@ 2014-05-22 6:17 ` Marek Szyprowski
0 siblings, 0 replies; 6+ messages in thread
From: Marek Szyprowski @ 2014-05-22 6:17 UTC (permalink / raw)
To: Gioh Kim, mina86, linux-mm, linux-kernel, linux-arm-kernel,
heesub.shin, mgorman, hannes
Cc: gunho.lee, chanho.min, gurugio, Joonsoo Kim
Hello,
On 2014-05-22 06:38, Gioh Kim wrote:
> If CMA is turned on and CMA size is set to zero, kernel should
> behave as if CMA was not enabled at compile time.
> Every dma allocation should check existence of cma area
> before requesting memory.
>
> Signed-off-by: Gioh Kim <gioh.kim@lge.com>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
> Acked-by: Michal Nazarewicz <mina86@mina86.com>
Thanks for this patch! The initial version was really ugly, but
this one really does what should be there from the begging.
I've applied this patch with redundant empty line add removed.
> ---
> arch/arm/mm/dma-mapping.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
> index 18e98df..9173a13 100644
> --- a/arch/arm/mm/dma-mapping.c
> +++ b/arch/arm/mm/dma-mapping.c
> @@ -390,12 +390,13 @@ static int __init atomic_pool_init(void)
> if (!pages)
> goto no_pages;
>
> - if (IS_ENABLED(CONFIG_DMA_CMA))
> + if (dev_get_cma_area(NULL))
> ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page,
> atomic_pool_init);
> else
> ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page,
> atomic_pool_init);
> +
> if (ptr) {
> int i;
>
> @@ -701,7 +702,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> addr = __alloc_simple_buffer(dev, size, gfp, &page);
> else if (!(gfp & __GFP_WAIT))
> addr = __alloc_from_pool(size, &page);
> - else if (!IS_ENABLED(CONFIG_DMA_CMA))
> + else if (!dev_get_cma_area(dev))
> addr = __alloc_remap_buffer(dev, size, gfp, prot, &page, caller);
> else
> addr = __alloc_from_contiguous(dev, size, prot, &page, caller);
> @@ -790,7 +791,7 @@ static void __arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
> __dma_free_buffer(page, size);
> } else if (__free_from_pool(cpu_addr, size)) {
> return;
> - } else if (!IS_ENABLED(CONFIG_DMA_CMA)) {
> + } else if (!dev_get_cma_area(dev)) {
> __dma_free_remap(cpu_addr, size);
> __dma_free_buffer(page, size);
> } else {
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 6+ messages in thread