dma-mapping: fix handling of dma-ranges for reserved memory (again)

Daniele reported that issue previously fixed in c41f9ea998f3
("drivers: dma-coherent: Account dma_pfn_offset when used with device
tree") reappear shortly after 43fc509c3efb ("dma-coherent: introduce
interface for default DMA pool") where fix was accidentally dropped.

Lets put fix back in place and respect dma-ranges for reserved memory.

Fixes: 43fc509c3efb ("dma-coherent: introduce interface for default DMA pool")

Reported-by: Daniele Alessandrelli <daniele.alessandrelli@gmail.com>
Tested-by: Daniele Alessandrelli <daniele.alessandrelli@gmail.com>
Tested-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index db92478983005c9e73ecec9e080bf9eab9bba2ae..287ef898a55e11990c20d83c9a8f97cacc137861 100644 (file)
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -35,7 +35,7 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t size,
                                 unsigned long attrs)
 
 {
-       void *ret = dma_alloc_from_global_coherent(size, dma_handle);
+       void *ret = dma_alloc_from_global_coherent(dev, size, dma_handle);
 
        /*
         * dma_alloc_from_global_coherent() may fail because:

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 4a1c4fca475adfebed1dca9e2181faa6f88f035e..10918c55003f7eba4a604568dade6697590d6cbe 100644 (file)
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -162,7 +162,7 @@ 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(ssize_t size, dma_addr_t *dma_handle);
+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);
@@ -172,7 +172,7 @@ int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
 #define dma_release_from_dev_coherent(dev, order, vaddr) (0)
 #define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
 
-static inline void *dma_alloc_from_global_coherent(ssize_t size,
+static inline void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
                                                   dma_addr_t *dma_handle)
 {
        return NULL;

diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 545e3869b0e3214e60dd1bc24488e00e039b4b6b..551b0eb7028a327b9ab4d6bbcd67c8fde43b96de 100644 (file)
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -123,8 +123,9 @@ int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
        return ret;
 }
 
-static void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem,
-               ssize_t size, dma_addr_t *dma_handle)
+static void *__dma_alloc_from_coherent(struct device *dev,
+                                      struct dma_coherent_mem *mem,
+                                      ssize_t size, dma_addr_t *dma_handle)
 {
        int order = get_order(size);
        unsigned long flags;
@@ -143,7 +144,7 @@ static void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem,
        /*
         * Memory was found in the coherent area.
         */
-       *dma_handle = mem->device_base + (pageno << PAGE_SHIFT);
+       *dma_handle = dma_get_device_base(dev, mem) + (pageno << PAGE_SHIFT);
        ret = mem->virt_base + (pageno << PAGE_SHIFT);
        spin_unlock_irqrestore(&mem->spinlock, flags);
        memset(ret, 0, size);
@@ -175,17 +176,18 @@ int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
        if (!mem)
                return 0;
 
-       *ret = __dma_alloc_from_coherent(mem, size, dma_handle);
+       *ret = __dma_alloc_from_coherent(dev, mem, size, dma_handle);
        return 1;
 }
 
-void *dma_alloc_from_global_coherent(ssize_t size, dma_addr_t *dma_handle)
+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(dma_coherent_default_memory, size,
-                       dma_handle);
+       return __dma_alloc_from_coherent(dev, dma_coherent_default_memory, size,
+                                        dma_handle);
 }
 
 static int __dma_release_from_coherent(struct dma_coherent_mem *mem,