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Message-ID: <1414245442-4306-5-git-send-email-stefano.stabellini@eu.citrix.com>
Date: Sat, 25 Oct 2014 14:57:20 +0100
From: Stefano Stabellini <stefano.stabellini@...citrix.com>
To: <xen-devel@...ts.xensource.com>
CC: <konrad.wilk@...cle.com>, <Ian.Campbell@...rix.com>,
<david.vrabel@...rix.com>, <linux-kernel@...r.kernel.org>,
<Stefano.Stabellini@...citrix.com>,
<linux-arm-kernel@...ts.infradead.org>,
Stefano Stabellini <stefano.stabellini@...citrix.com>
Subject: [PATCH v6 5/7] xen/arm/arm64: merge xen/mm32.c into xen/mm.c
Merge xen/mm32.c into xen/mm.c.
As a consequence the code gets compiled on arm64 too: introduce a few
compat functions to actually be able to compile it.
Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
Acked-by: Ian Campbell <ian.campbell@...rix.com>
---
arch/arm/xen/Makefile | 2 +-
arch/arm/xen/mm.c | 128 ++++++++++++++++++++++++++++
arch/arm/xen/mm32.c | 116 -------------------------
arch/arm64/include/asm/xen/page-coherent.h | 44 +---------
4 files changed, 130 insertions(+), 160 deletions(-)
delete mode 100644 arch/arm/xen/mm32.c
diff --git a/arch/arm/xen/Makefile b/arch/arm/xen/Makefile
index 1f85bfe..1296952 100644
--- a/arch/arm/xen/Makefile
+++ b/arch/arm/xen/Makefile
@@ -1 +1 @@
-obj-y := enlighten.o hypercall.o grant-table.o p2m.o mm.o mm32.o
+obj-y := enlighten.o hypercall.o grant-table.o p2m.o mm.o
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index b0e77de..8a23a10 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -1,6 +1,10 @@
+#include <linux/cpu.h>
+#include <linux/dma-mapping.h>
#include <linux/bootmem.h>
#include <linux/gfp.h>
+#include <linux/highmem.h>
#include <linux/export.h>
+#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/dma-mapping.h>
@@ -16,6 +20,130 @@
#include <asm/xen/hypercall.h>
#include <asm/xen/interface.h>
+
+#ifdef CONFIG_ARM64
+static inline void dmac_map_area(const void *start, size_t size, int dir)
+{
+ return __dma_map_area(start, size, dir);
+}
+
+static inline void dmac_unmap_area(const void *start, size_t size, int dir)
+{
+ return __dma_unmap_area(start, size, dir);
+}
+
+static inline bool cache_is_vipt_nonaliasing(void)
+{
+ return true;
+}
+
+static inline void *kmap_high_get(struct page *page)
+{
+ return NULL;
+}
+
+static inline void kunmap_high(struct page *page) {}
+#endif
+
+static inline bool is_dma_coherent(struct device *dev)
+{
+ return of_dma_is_coherent(dev->of_node);
+}
+
+/* functions called by SWIOTLB */
+
+static void dma_cache_maint(dma_addr_t handle, unsigned long offset,
+ size_t size, enum dma_data_direction dir,
+ void (*op)(const void *, size_t, int))
+{
+ unsigned long pfn;
+ size_t left = size;
+
+ pfn = (handle >> PAGE_SHIFT) + offset / PAGE_SIZE;
+ offset %= PAGE_SIZE;
+
+ do {
+ size_t len = left;
+ void *vaddr;
+
+ if (!pfn_valid(pfn))
+ {
+ /* TODO: cache flush */
+ } else {
+ struct page *page = pfn_to_page(pfn);
+
+ if (PageHighMem(page)) {
+ if (len + offset > PAGE_SIZE)
+ len = PAGE_SIZE - offset;
+
+ if (cache_is_vipt_nonaliasing()) {
+ vaddr = kmap_atomic(page);
+ op(vaddr + offset, len, dir);
+ kunmap_atomic(vaddr);
+ } else {
+ vaddr = kmap_high_get(page);
+ if (vaddr) {
+ op(vaddr + offset, len, dir);
+ kunmap_high(page);
+ }
+ }
+ } else {
+ vaddr = page_address(page) + offset;
+ op(vaddr, len, dir);
+ }
+ }
+
+ offset = 0;
+ pfn++;
+ left -= len;
+ } while (left);
+}
+
+static void __xen_dma_page_dev_to_cpu(struct device *hwdev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ /* Cannot use __dma_page_dev_to_cpu because we don't have a
+ * struct page for handle */
+
+ dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, dmac_unmap_area);
+}
+
+static void __xen_dma_page_cpu_to_dev(struct device *hwdev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+
+ dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, dmac_map_area);
+}
+
+void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+
+{
+ if (is_dma_coherent(hwdev))
+ return;
+ if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
+ return;
+
+ __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
+}
+
+void xen_dma_sync_single_for_cpu(struct device *hwdev,
+ dma_addr_t handle, size_t size, enum dma_data_direction dir)
+{
+ if (is_dma_coherent(hwdev))
+ return;
+ __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
+}
+
+void xen_dma_sync_single_for_device(struct device *hwdev,
+ dma_addr_t handle, size_t size, enum dma_data_direction dir)
+{
+ if (is_dma_coherent(hwdev))
+ return;
+ __xen_dma_page_cpu_to_dev(hwdev, handle, size, dir);
+}
+
int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
unsigned int address_bits,
dma_addr_t *dma_handle)
diff --git a/arch/arm/xen/mm32.c b/arch/arm/xen/mm32.c
deleted file mode 100644
index 4daf931..0000000
--- a/arch/arm/xen/mm32.c
+++ /dev/null
@@ -1,116 +0,0 @@
-#include <linux/cpu.h>
-#include <linux/dma-mapping.h>
-#include <linux/gfp.h>
-#include <linux/highmem.h>
-#include <linux/of_address.h>
-
-#include <xen/features.h>
-
-
-static inline bool is_dma_coherent(struct device *dev)
-{
- return of_dma_is_coherent(dev->of_node);
-}
-
-/* functions called by SWIOTLB */
-
-static void dma_cache_maint(dma_addr_t handle, unsigned long offset,
- size_t size, enum dma_data_direction dir,
- void (*op)(const void *, size_t, int))
-{
- unsigned long pfn;
- size_t left = size;
-
- pfn = (handle >> PAGE_SHIFT) + offset / PAGE_SIZE;
- offset %= PAGE_SIZE;
-
- do {
- size_t len = left;
- void *vaddr;
-
- if (!pfn_valid(pfn))
- {
- /* TODO: cache flush */
- } else {
- struct page *page = pfn_to_page(pfn);
-
- if (PageHighMem(page)) {
- if (len + offset > PAGE_SIZE)
- len = PAGE_SIZE - offset;
-
- if (cache_is_vipt_nonaliasing()) {
- vaddr = kmap_atomic(page);
- op(vaddr + offset, len, dir);
- kunmap_atomic(vaddr);
- } else {
- vaddr = kmap_high_get(page);
- if (vaddr) {
- op(vaddr + offset, len, dir);
- kunmap_high(page);
- }
- }
- } else {
- vaddr = page_address(page) + offset;
- op(vaddr, len, dir);
- }
- }
-
- offset = 0;
- pfn++;
- left -= len;
- } while (left);
-}
-
-static void __xen_dma_page_dev_to_cpu(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir)
-{
- /* Cannot use __dma_page_dev_to_cpu because we don't have a
- * struct page for handle */
-
- dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, dmac_unmap_area);
-}
-
-static void __xen_dma_page_cpu_to_dev(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir)
-{
-
- dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, dmac_map_area);
-}
-
-void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
-
-{
- if (is_dma_coherent(hwdev))
- return;
- if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
- return;
-
- __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
-}
-
-void xen_dma_sync_single_for_cpu(struct device *hwdev,
- dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
- if (is_dma_coherent(hwdev))
- return;
- __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
-}
-
-void xen_dma_sync_single_for_device(struct device *hwdev,
- dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
- if (is_dma_coherent(hwdev))
- return;
- __xen_dma_page_cpu_to_dev(hwdev, handle, size, dir);
-}
-
-int __init xen_mm32_init(void)
-{
- if (!xen_initial_domain())
- return 0;
-
- return 0;
-}
-arch_initcall(xen_mm32_init);
diff --git a/arch/arm64/include/asm/xen/page-coherent.h b/arch/arm64/include/asm/xen/page-coherent.h
index dde3fc9..2052102 100644
--- a/arch/arm64/include/asm/xen/page-coherent.h
+++ b/arch/arm64/include/asm/xen/page-coherent.h
@@ -1,43 +1 @@
-#ifndef _ASM_ARM64_XEN_PAGE_COHERENT_H
-#define _ASM_ARM64_XEN_PAGE_COHERENT_H
-
-#include <asm/page.h>
-#include <linux/dma-attrs.h>
-#include <linux/dma-mapping.h>
-
-static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
- dma_addr_t *dma_handle, gfp_t flags,
- struct dma_attrs *attrs)
-{
- return __generic_dma_ops(hwdev)->alloc(hwdev, size, dma_handle, flags, attrs);
-}
-
-static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
- void *cpu_addr, dma_addr_t dma_handle,
- struct dma_attrs *attrs)
-{
- __generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, attrs);
-}
-
-static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
- unsigned long offset, size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
-{
-}
-
-static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
-{
-}
-
-static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
- dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-}
-
-static inline void xen_dma_sync_single_for_device(struct device *hwdev,
- dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-}
-#endif /* _ASM_ARM64_XEN_PAGE_COHERENT_H */
+#include <../../arm/include/asm/xen/page-coherent.h>
--
1.7.10.4
--
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