1 files changed, 92 insertions, 109 deletions

diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 8449504f5e0b..ce9e54c887fa 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -216,10 +216,30 @@ iommu_arena_free(struct pci_iommu_arena *arena, long ofs, long n)
         for (i = 0; i < n; ++i)
                 p[i] = 0;
 }
-
-/* True if the machine supports DAC addressing, and DEV can
-   make use of it given MASK.  */
-static int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);
+
+/*
+ * True if the machine supports DAC addressing, and DEV can
+ * make use of it given MASK.
+ */
+static int pci_dac_dma_supported(struct pci_dev *dev, u64 mask)
+{
+        dma64_addr_t dac_offset = alpha_mv.pci_dac_offset;
+        int ok = 1;
+
+        /* If this is not set, the machine doesn't support DAC at all.  */
+        if (dac_offset == 0)
+                ok = 0;
+
+        /* The device has to be able to address our DAC bit.  */
+        if ((dac_offset & dev->dma_mask) != dac_offset)
+                ok = 0;
+
+        /* If both conditions above are met, we are fine. */
+        DBGA("pci_dac_dma_supported %s from %p\n",
+             ok ? "yes" : "no", __builtin_return_address(0));
+
+        return ok;
+}
 
 /* Map a single buffer of the indicated size for PCI DMA in streaming
    mode.  The 32-bit PCI bus mastering address to use is returned.
@@ -301,23 +321,36 @@ pci_map_single_1(struct pci_dev *pdev, void *cpu_addr, size_t size,
         return ret;
 }
 
-dma_addr_t
-pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, int dir)
+/* Helper for generic DMA-mapping functions. */
+static struct pci_dev *alpha_gendev_to_pci(struct device *dev)
 {
-        int dac_allowed; 
+        if (dev && dev->bus == &pci_bus_type)
+                return to_pci_dev(dev);
 
-        if (dir == PCI_DMA_NONE)
-                BUG();
+        /* Assume that non-PCI devices asking for DMA are either ISA or EISA,
+           BUG() otherwise. */
+        BUG_ON(!isa_bridge);
 
-        dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0; 
-        return pci_map_single_1(pdev, cpu_addr, size, dac_allowed);
+        /* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA
+           bridge is bus master then). */
+        if (!dev || !dev->dma_mask || !*dev->dma_mask)
+                return isa_bridge;
+
+        /* For EISA bus masters, return isa_bridge (it might have smaller
+           dma_mask due to wiring limitations). */
+        if (*dev->dma_mask >= isa_bridge->dma_mask)
+                return isa_bridge;
+
+        /* This assumes ISA bus master with dma_mask 0xffffff. */
+        return NULL;
 }
-EXPORT_SYMBOL(pci_map_single);
 
-dma_addr_t
-pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset,
-             size_t size, int dir)
+static dma_addr_t alpha_pci_map_page(struct device *dev, struct page *page,
+                                     unsigned long offset, size_t size,
+                                     enum dma_data_direction dir,
+                                     struct dma_attrs *attrs)
 {
+        struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         int dac_allowed;
 
         if (dir == PCI_DMA_NONE)
@@ -327,7 +360,6 @@ pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset,
         return pci_map_single_1(pdev, (char *)page_address(page) + offset, 
                                 size, dac_allowed);
 }
-EXPORT_SYMBOL(pci_map_page);
 
 /* Unmap a single streaming mode DMA translation.  The DMA_ADDR and
    SIZE must match what was provided for in a previous pci_map_single
@@ -335,16 +367,17 @@ EXPORT_SYMBOL(pci_map_page);
    the cpu to the buffer are guaranteed to see whatever the device
    wrote there.  */
 
-void
-pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
-                 int direction)
+static void alpha_pci_unmap_page(struct device *dev, dma_addr_t dma_addr,
+                                 size_t size, enum dma_data_direction dir,
+                                 struct dma_attrs *attrs)
 {
         unsigned long flags;
+        struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         struct pci_controller *hose = pdev ? pdev->sysdata : pci_isa_hose;
         struct pci_iommu_arena *arena;
         long dma_ofs, npages;
 
-        if (direction == PCI_DMA_NONE)
+        if (dir == PCI_DMA_NONE)
                 BUG();
 
         if (dma_addr >= __direct_map_base
@@ -393,25 +426,16 @@ pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
         DBGA2("pci_unmap_single: sg [%llx,%zx] np %ld from %p\n",
               dma_addr, size, npages, __builtin_return_address(0));
 }
-EXPORT_SYMBOL(pci_unmap_single);
-
-void
-pci_unmap_page(struct pci_dev *pdev, dma_addr_t dma_addr,
-               size_t size, int direction)
-{
-        pci_unmap_single(pdev, dma_addr, size, direction);
-}
-EXPORT_SYMBOL(pci_unmap_page);
 
 /* Allocate and map kernel buffer using consistent mode DMA for PCI
    device.  Returns non-NULL cpu-view pointer to the buffer if
    successful and sets *DMA_ADDRP to the pci side dma address as well,
    else DMA_ADDRP is undefined.  */
 
-void *
-__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
-                       dma_addr_t *dma_addrp, gfp_t gfp)
+static void *alpha_pci_alloc_coherent(struct device *dev, size_t size,
+                                      dma_addr_t *dma_addrp, gfp_t gfp)
 {
+        struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         void *cpu_addr;
         long order = get_order(size);
 
@@ -439,13 +463,12 @@ try_again:
                 gfp |= GFP_DMA;
                 goto try_again;
         }
-                
+
         DBGA2("pci_alloc_consistent: %zx -> [%p,%llx] from %p\n",
               size, cpu_addr, *dma_addrp, __builtin_return_address(0));
 
         return cpu_addr;
 }
-EXPORT_SYMBOL(__pci_alloc_consistent);
 
 /* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
    be values that were returned from pci_alloc_consistent.  SIZE must
@@ -453,17 +476,16 @@ EXPORT_SYMBOL(__pci_alloc_consistent);
    References to the memory and mappings associated with CPU_ADDR or
    DMA_ADDR past this call are illegal.  */
 
-void
-pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
-                    dma_addr_t dma_addr)
+static void alpha_pci_free_coherent(struct device *dev, size_t size,
+                                    void *cpu_addr, dma_addr_t dma_addr)
 {
+        struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         pci_unmap_single(pdev, dma_addr, size, PCI_DMA_BIDIRECTIONAL);
         free_pages((unsigned long)cpu_addr, get_order(size));
 
         DBGA2("pci_free_consistent: [%llx,%zx] from %p\n",
               dma_addr, size, __builtin_return_address(0));
 }
-EXPORT_SYMBOL(pci_free_consistent);
 
 /* Classify the elements of the scatterlist.  Write dma_address
    of each element with:
@@ -626,23 +648,21 @@ sg_fill(struct device *dev, struct scatterlist *leader, struct scatterlist *end,
         return 1;
 }
 
-int
-pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-           int direction)
+static int alpha_pci_map_sg(struct device *dev, struct scatterlist *sg,
+                            int nents, enum dma_data_direction dir,
+                            struct dma_attrs *attrs)
 {
+        struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         struct scatterlist *start, *end, *out;
         struct pci_controller *hose;
         struct pci_iommu_arena *arena;
         dma_addr_t max_dma;
         int dac_allowed;
-        struct device *dev;
 
-        if (direction == PCI_DMA_NONE)
+        if (dir == PCI_DMA_NONE)
                 BUG();
 
-        dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
-
-        dev = pdev ? &pdev->dev : NULL;
+        dac_allowed = dev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
 
         /* Fast path single entry scatterlists.  */
         if (nents == 1) {
@@ -699,19 +719,19 @@ pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
         /* Some allocation failed while mapping the scatterlist
            entries.  Unmap them now.  */
         if (out > start)
-                pci_unmap_sg(pdev, start, out - start, direction);
+                pci_unmap_sg(pdev, start, out - start, dir);
         return 0;
 }
-EXPORT_SYMBOL(pci_map_sg);
 
 /* Unmap a set of streaming mode DMA translations.  Again, cpu read
    rules concerning calls here are the same as for pci_unmap_single()
    above.  */
 
-void
-pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-             int direction)
+static void alpha_pci_unmap_sg(struct device *dev, struct scatterlist *sg,
+                               int nents, enum dma_data_direction dir,
+                               struct dma_attrs *attrs)
 {
+        struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         unsigned long flags;
         struct pci_controller *hose;
         struct pci_iommu_arena *arena;
@@ -719,7 +739,7 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
         dma_addr_t max_dma;
         dma_addr_t fbeg, fend;
 
-        if (direction == PCI_DMA_NONE)
+        if (dir == PCI_DMA_NONE)
                 BUG();
 
         if (! alpha_mv.mv_pci_tbi)
@@ -783,15 +803,13 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
 
         DBGA("pci_unmap_sg: %ld entries\n", nents - (end - sg));
 }
-EXPORT_SYMBOL(pci_unmap_sg);
-
 
 /* Return whether the given PCI device DMA address mask can be
    supported properly.  */
 
-int
-pci_dma_supported(struct pci_dev *pdev, u64 mask)
+static int alpha_pci_supported(struct device *dev, u64 mask)
 {
+        struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         struct pci_controller *hose;
         struct pci_iommu_arena *arena;
 
@@ -818,7 +836,6 @@ pci_dma_supported(struct pci_dev *pdev, u64 mask)
 
         return 0;
 }
-EXPORT_SYMBOL(pci_dma_supported);
 
 
 /*
@@ -918,66 +935,32 @@ iommu_unbind(struct pci_iommu_arena *arena, long pg_start, long pg_count)
         return 0;
 }
 
-/* True if the machine supports DAC addressing, and DEV can
-   make use of it given MASK.  */
-
-static int
-pci_dac_dma_supported(struct pci_dev *dev, u64 mask)
-{
-        dma64_addr_t dac_offset = alpha_mv.pci_dac_offset;
-        int ok = 1;
-
-        /* If this is not set, the machine doesn't support DAC at all.  */
-        if (dac_offset == 0)
-                ok = 0;
-
-        /* The device has to be able to address our DAC bit.  */
-        if ((dac_offset & dev->dma_mask) != dac_offset)
-                ok = 0;
-
-        /* If both conditions above are met, we are fine. */
-        DBGA("pci_dac_dma_supported %s from %p\n",
-             ok ? "yes" : "no", __builtin_return_address(0));
-
-        return ok;
-}
-
-/* Helper for generic DMA-mapping functions. */
-
-struct pci_dev *
-alpha_gendev_to_pci(struct device *dev)
+static int alpha_pci_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
-        if (dev && dev->bus == &pci_bus_type)
-                return to_pci_dev(dev);
-
-        /* Assume that non-PCI devices asking for DMA are either ISA or EISA,
-           BUG() otherwise. */
-        BUG_ON(!isa_bridge);
-
-        /* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA
-           bridge is bus master then). */
-        if (!dev || !dev->dma_mask || !*dev->dma_mask)
-                return isa_bridge;
-
-        /* For EISA bus masters, return isa_bridge (it might have smaller
-           dma_mask due to wiring limitations). */
-        if (*dev->dma_mask >= isa_bridge->dma_mask)
-                return isa_bridge;
-
-        /* This assumes ISA bus master with dma_mask 0xffffff. */
-        return NULL;
+        return dma_addr == 0;
 }
-EXPORT_SYMBOL(alpha_gendev_to_pci);
 
-int
-dma_set_mask(struct device *dev, u64 mask)
+static int alpha_pci_set_mask(struct device *dev, u64 mask)
 {
         if (!dev->dma_mask ||
             !pci_dma_supported(alpha_gendev_to_pci(dev), mask))
                 return -EIO;
 
         *dev->dma_mask = mask;
-
         return 0;
 }
-EXPORT_SYMBOL(dma_set_mask);
+
+struct dma_map_ops alpha_pci_ops = {
+        .alloc_coherent         = alpha_pci_alloc_coherent,
+        .free_coherent          = alpha_pci_free_coherent,
+        .map_page               = alpha_pci_map_page,
+        .unmap_page             = alpha_pci_unmap_page,
+        .map_sg                 = alpha_pci_map_sg,
+        .unmap_sg               = alpha_pci_unmap_sg,
+        .mapping_error          = alpha_pci_mapping_error,
+        .dma_supported          = alpha_pci_supported,
+        .set_dma_mask           = alpha_pci_set_mask,
+};
+
+struct dma_map_ops *dma_ops = &alpha_pci_ops;
+EXPORT_SYMBOL(dma_ops);