diff mbox series

[6/7] dma-mapping: make the global coherent pool conditional

Message ID 20210712061704.4162464-7-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [1/7] dma-direct: add support for dma_coherent_default_memory | expand

Commit Message

Christoph Hellwig July 12, 2021, 6:17 a.m. UTC 
Only build the code to support the global coherent pool if support for
it is enabled.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Dillon Min <dillon.minfei@gmail.com>
---
 include/linux/dma-map-ops.h | 18 +++++++-------
 kernel/dma/coherent.c       | 47 ++++++++++++++++++++-----------------
 2 files changed, 35 insertions(+), 30 deletions(-)

Comments

Atish Patra July 23, 2021, 9:41 p.m. UTC | #1 
On Sun, Jul 11, 2021 at 11:25 PM Christoph Hellwig <hch@lst.de> wrote:
>
> Only build the code to support the global coherent pool if support for
> it is enabled.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Tested-by: Dillon Min <dillon.minfei@gmail.com>
> ---
>  include/linux/dma-map-ops.h | 18 +++++++-------
>  kernel/dma/coherent.c       | 47 ++++++++++++++++++++-----------------
>  2 files changed, 35 insertions(+), 30 deletions(-)
>
> diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h
> index 7e49bb86a0c0..9b79aa4dd300 100644
> --- a/include/linux/dma-map-ops.h
> +++ b/include/linux/dma-map-ops.h
> @@ -170,13 +170,6 @@ int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
>  int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr);
>  int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
>                 void *cpu_addr, size_t size, int *ret);
> -
> -void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
> -               dma_addr_t *dma_handle);
> -int dma_release_from_global_coherent(int order, void *vaddr);
> -int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
> -               size_t size, int *ret);
> -int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
>  #else
>  static inline int dma_declare_coherent_memory(struct device *dev,
>                 phys_addr_t phys_addr, dma_addr_t device_addr, size_t size)
> @@ -186,7 +179,16 @@ static inline int dma_declare_coherent_memory(struct device *dev,
>  #define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
>  #define dma_release_from_dev_coherent(dev, order, vaddr) (0)
>  #define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
> +#endif /* CONFIG_DMA_DECLARE_COHERENT */
>
> +#ifdef CONFIG_DMA_GLOBAL_POOL
> +void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
> +               dma_addr_t *dma_handle);
> +int dma_release_from_global_coherent(int order, void *vaddr);
> +int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
> +               size_t size, int *ret);
> +int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
> +#else
>  static inline void *dma_alloc_from_global_coherent(struct device *dev,
>                 ssize_t size, dma_addr_t *dma_handle)
>  {
> @@ -201,7 +203,7 @@ static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
>  {
>         return 0;
>  }
> -#endif /* CONFIG_DMA_DECLARE_COHERENT */
> +#endif /* CONFIG_DMA_GLOBAL_POOL */
>
>  /*
>   * This is the actual return value from the ->alloc_noncontiguous method.
> diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
> index 160d4e246ecb..c05408902a68 100644
> --- a/kernel/dma/coherent.c
> +++ b/kernel/dma/coherent.c
> @@ -20,8 +20,6 @@ struct dma_coherent_mem {
>         bool            use_dev_dma_pfn_offset;
>  };
>
> -static struct dma_coherent_mem *dma_coherent_default_memory __ro_after_init;
> -
>  static inline struct dma_coherent_mem *dev_get_coherent_memory(struct device *dev)
>  {
>         if (dev && dev->dma_mem)
> @@ -191,16 +189,6 @@ int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
>         return 1;
>  }
>
> -void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
> -                                    dma_addr_t *dma_handle)
> -{
> -       if (!dma_coherent_default_memory)
> -               return NULL;
> -
> -       return __dma_alloc_from_coherent(dev, dma_coherent_default_memory, size,
> -                                        dma_handle);
> -}
> -
>  static int __dma_release_from_coherent(struct dma_coherent_mem *mem,
>                                        int order, void *vaddr)
>  {
> @@ -236,15 +224,6 @@ int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr)
>         return __dma_release_from_coherent(mem, order, vaddr);
>  }
>
> -int dma_release_from_global_coherent(int order, void *vaddr)
> -{
> -       if (!dma_coherent_default_memory)
> -               return 0;
> -
> -       return __dma_release_from_coherent(dma_coherent_default_memory, order,
> -                       vaddr);
> -}
> -
>  static int __dma_mmap_from_coherent(struct dma_coherent_mem *mem,
>                 struct vm_area_struct *vma, void *vaddr, size_t size, int *ret)
>  {
> @@ -290,6 +269,28 @@ int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
>         return __dma_mmap_from_coherent(mem, vma, vaddr, size, ret);
>  }
>
> +#ifdef CONFIG_DMA_GLOBAL_POOL
> +static struct dma_coherent_mem *dma_coherent_default_memory __ro_after_init;
> +
> +void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
> +                                    dma_addr_t *dma_handle)
> +{
> +       if (!dma_coherent_default_memory)
> +               return NULL;
> +
> +       return __dma_alloc_from_coherent(dev, dma_coherent_default_memory, size,
> +                                        dma_handle);
> +}
> +
> +int dma_release_from_global_coherent(int order, void *vaddr)
> +{
> +       if (!dma_coherent_default_memory)
> +               return 0;
> +
> +       return __dma_release_from_coherent(dma_coherent_default_memory, order,
> +                       vaddr);
> +}
> +
>  int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *vaddr,
>                                    size_t size, int *ret)
>  {
> @@ -311,6 +312,7 @@ int dma_init_global_coherent(phys_addr_t phys_addr, size_t size)
>         pr_info("DMA: default coherent area is set\n");
>         return 0;
>  }
> +#endif /* CONFIG_DMA_GLOBAL_POOL */
>
>  /*
>   * Support for reserved memory regions defined in device tree
> @@ -377,6 +379,7 @@ static int __init rmem_dma_setup(struct reserved_mem *rmem)
>         return 0;
>  }
>
> +#ifdef CONFIG_DMA_GLOBAL_POOL
>  static int __init dma_init_reserved_memory(void)
>  {
>         if (!dma_reserved_default_memory)
> @@ -384,8 +387,8 @@ static int __init dma_init_reserved_memory(void)
>         return dma_init_global_coherent(dma_reserved_default_memory->base,
>                                         dma_reserved_default_memory->size);

dma_reserved_default_memory also needs to be moved inside
CONFIG_DMA_GLOBAL_POOL because
all the usages are already part of that config.


>  }
> -
>  core_initcall(dma_init_reserved_memory);
> +#endif /* CONFIG_DMA_GLOBAL_POOL */
>
>  RESERVEDMEM_OF_DECLARE(dma, "shared-dma-pool", rmem_dma_setup);
>  #endif
> --
> 2.30.2
>
> _______________________________________________
> iommu mailing list
> iommu@lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu



--
Regards,
Atish
diff mbox series

Patch

diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h
index 7e49bb86a0c0..9b79aa4dd300 100644
--- a/include/linux/dma-map-ops.h
+++ b/include/linux/dma-map-ops.h
@@ -170,13 +170,6 @@  int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
 int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr);
 int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
 		void *cpu_addr, size_t size, int *ret);
-
-void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
-		dma_addr_t *dma_handle);
-int dma_release_from_global_coherent(int order, void *vaddr);
-int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
-		size_t size, int *ret);
-int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
 #else
 static inline int dma_declare_coherent_memory(struct device *dev,
 		phys_addr_t phys_addr, dma_addr_t device_addr, size_t size)
@@ -186,7 +179,16 @@  static inline int dma_declare_coherent_memory(struct device *dev,
 #define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
 #define dma_release_from_dev_coherent(dev, order, vaddr) (0)
 #define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
+#endif /* CONFIG_DMA_DECLARE_COHERENT */
 
+#ifdef CONFIG_DMA_GLOBAL_POOL
+void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
+		dma_addr_t *dma_handle);
+int dma_release_from_global_coherent(int order, void *vaddr);
+int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
+		size_t size, int *ret);
+int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
+#else
 static inline void *dma_alloc_from_global_coherent(struct device *dev,
 		ssize_t size, dma_addr_t *dma_handle)
 {
@@ -201,7 +203,7 @@  static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
 {
 	return 0;
 }
-#endif /* CONFIG_DMA_DECLARE_COHERENT */
+#endif /* CONFIG_DMA_GLOBAL_POOL */
 
 /*
  * This is the actual return value from the ->alloc_noncontiguous method.
diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 160d4e246ecb..c05408902a68 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -20,8 +20,6 @@  struct dma_coherent_mem {
 	bool		use_dev_dma_pfn_offset;
 };
 
-static struct dma_coherent_mem *dma_coherent_default_memory __ro_after_init;
-
 static inline struct dma_coherent_mem *dev_get_coherent_memory(struct device *dev)
 {
 	if (dev && dev->dma_mem)
@@ -191,16 +189,6 @@  int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
 	return 1;
 }
 
-void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
-				     dma_addr_t *dma_handle)
-{
-	if (!dma_coherent_default_memory)
-		return NULL;
-
-	return __dma_alloc_from_coherent(dev, dma_coherent_default_memory, size,
-					 dma_handle);
-}
-
 static int __dma_release_from_coherent(struct dma_coherent_mem *mem,
 				       int order, void *vaddr)
 {
@@ -236,15 +224,6 @@  int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr)
 	return __dma_release_from_coherent(mem, order, vaddr);
 }
 
-int dma_release_from_global_coherent(int order, void *vaddr)
-{
-	if (!dma_coherent_default_memory)
-		return 0;
-
-	return __dma_release_from_coherent(dma_coherent_default_memory, order,
-			vaddr);
-}
-
 static int __dma_mmap_from_coherent(struct dma_coherent_mem *mem,
 		struct vm_area_struct *vma, void *vaddr, size_t size, int *ret)
 {
@@ -290,6 +269,28 @@  int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
 	return __dma_mmap_from_coherent(mem, vma, vaddr, size, ret);
 }
 
+#ifdef CONFIG_DMA_GLOBAL_POOL
+static struct dma_coherent_mem *dma_coherent_default_memory __ro_after_init;
+
+void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
+				     dma_addr_t *dma_handle)
+{
+	if (!dma_coherent_default_memory)
+		return NULL;
+
+	return __dma_alloc_from_coherent(dev, dma_coherent_default_memory, size,
+					 dma_handle);
+}
+
+int dma_release_from_global_coherent(int order, void *vaddr)
+{
+	if (!dma_coherent_default_memory)
+		return 0;
+
+	return __dma_release_from_coherent(dma_coherent_default_memory, order,
+			vaddr);
+}
+
 int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *vaddr,
 				   size_t size, int *ret)
 {
@@ -311,6 +312,7 @@  int dma_init_global_coherent(phys_addr_t phys_addr, size_t size)
 	pr_info("DMA: default coherent area is set\n");
 	return 0;
 }
+#endif /* CONFIG_DMA_GLOBAL_POOL */
 
 /*
  * Support for reserved memory regions defined in device tree
@@ -377,6 +379,7 @@  static int __init rmem_dma_setup(struct reserved_mem *rmem)
 	return 0;
 }
 
+#ifdef CONFIG_DMA_GLOBAL_POOL
 static int __init dma_init_reserved_memory(void)
 {
 	if (!dma_reserved_default_memory)
@@ -384,8 +387,8 @@  static int __init dma_init_reserved_memory(void)
 	return dma_init_global_coherent(dma_reserved_default_memory->base,
 					dma_reserved_default_memory->size);
 }
-
 core_initcall(dma_init_reserved_memory);
+#endif /* CONFIG_DMA_GLOBAL_POOL */
 
 RESERVEDMEM_OF_DECLARE(dma, "shared-dma-pool", rmem_dma_setup);
 #endif