Added missing tegra files.HEADmaster

1 files changed, 198 insertions, 0 deletions

diff --git a/drivers/gpu/ion/ion_system_heap.c b/drivers/gpu/ion/ion_system_heap.c
new file mode 100644
index 00000000000..c046cf1a321
--- /dev/null
+++ b/drivers/gpu/ion/ion_system_heap.c
@@ -0,0 +1,198 @@
+/*
+ * drivers/gpu/ion/ion_system_heap.c
+ *
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/ion.h>
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include "ion_priv.h"
+
+static int ion_system_heap_allocate(struct ion_heap *heap,
+                                     struct ion_buffer *buffer,
+                                     unsigned long size, unsigned long align,
+                                     unsigned long flags)
+{
+        buffer->priv_virt = vmalloc_user(size);
+        if (!buffer->priv_virt)
+                return -ENOMEM;
+        return 0;
+}
+
+void ion_system_heap_free(struct ion_buffer *buffer)
+{
+        vfree(buffer->priv_virt);
+}
+
+struct scatterlist *ion_system_heap_map_dma(struct ion_heap *heap,
+                                            struct ion_buffer *buffer)
+{
+        struct scatterlist *sglist;
+        struct page *page;
+        int i;
+        int npages = PAGE_ALIGN(buffer->size) / PAGE_SIZE;
+        void *vaddr = buffer->priv_virt;
+
+        sglist = vmalloc(npages * sizeof(struct scatterlist));
+        if (!sglist)
+                return ERR_PTR(-ENOMEM);
+        memset(sglist, 0, npages * sizeof(struct scatterlist));
+        sg_init_table(sglist, npages);
+        for (i = 0; i < npages; i++) {
+                page = vmalloc_to_page(vaddr);
+                if (!page)
+                        goto end;
+                sg_set_page(&sglist[i], page, PAGE_SIZE, 0);
+                vaddr += PAGE_SIZE;
+        }
+        /* XXX do cache maintenance for dma? */
+        return sglist;
+end:
+        vfree(sglist);
+        return NULL;
+}
+
+void ion_system_heap_unmap_dma(struct ion_heap *heap,
+                               struct ion_buffer *buffer)
+{
+        /* XXX undo cache maintenance for dma? */
+        if (buffer->sglist)
+                vfree(buffer->sglist);
+}
+
+void *ion_system_heap_map_kernel(struct ion_heap *heap,
+                                 struct ion_buffer *buffer)
+{
+        return buffer->priv_virt;
+}
+
+void ion_system_heap_unmap_kernel(struct ion_heap *heap,
+                                  struct ion_buffer *buffer)
+{
+}
+
+int ion_system_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
+                             struct vm_area_struct *vma)
+{
+        return remap_vmalloc_range(vma, buffer->priv_virt, vma->vm_pgoff);
+}
+
+static struct ion_heap_ops vmalloc_ops = {
+        .allocate = ion_system_heap_allocate,
+        .free = ion_system_heap_free,
+        .map_dma = ion_system_heap_map_dma,
+        .unmap_dma = ion_system_heap_unmap_dma,
+        .map_kernel = ion_system_heap_map_kernel,
+        .unmap_kernel = ion_system_heap_unmap_kernel,
+        .map_user = ion_system_heap_map_user,
+};
+
+struct ion_heap *ion_system_heap_create(struct ion_platform_heap *unused)
+{
+        struct ion_heap *heap;
+
+        heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL);
+        if (!heap)
+                return ERR_PTR(-ENOMEM);
+        heap->ops = &vmalloc_ops;
+        heap->type = ION_HEAP_TYPE_SYSTEM;
+        return heap;
+}
+
+void ion_system_heap_destroy(struct ion_heap *heap)
+{
+        kfree(heap);
+}
+
+static int ion_system_contig_heap_allocate(struct ion_heap *heap,
+                                           struct ion_buffer *buffer,
+                                           unsigned long len,
+                                           unsigned long align,
+                                           unsigned long flags)
+{
+        buffer->priv_virt = kzalloc(len, GFP_KERNEL);
+        if (!buffer->priv_virt)
+                return -ENOMEM;
+        return 0;
+}
+
+void ion_system_contig_heap_free(struct ion_buffer *buffer)
+{
+        kfree(buffer->priv_virt);
+}
+
+static int ion_system_contig_heap_phys(struct ion_heap *heap,
+                                       struct ion_buffer *buffer,
+                                       ion_phys_addr_t *addr, size_t *len)
+{
+        *addr = virt_to_phys(buffer->priv_virt);
+        *len = buffer->size;
+        return 0;
+}
+
+struct scatterlist *ion_system_contig_heap_map_dma(struct ion_heap *heap,
+                                                   struct ion_buffer *buffer)
+{
+        struct scatterlist *sglist;
+
+        sglist = vmalloc(sizeof(struct scatterlist));
+        if (!sglist)
+                return ERR_PTR(-ENOMEM);
+        sg_init_table(sglist, 1);
+        sg_set_page(sglist, virt_to_page(buffer->priv_virt), buffer->size, 0);
+        return sglist;
+}
+
+int ion_system_contig_heap_map_user(struct ion_heap *heap,
+                                    struct ion_buffer *buffer,
+                                    struct vm_area_struct *vma)
+{
+        unsigned long pfn = __phys_to_pfn(virt_to_phys(buffer->priv_virt));
+        return remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff,
+                               vma->vm_end - vma->vm_start,
+                               vma->vm_page_prot);
+
+}
+
+static struct ion_heap_ops kmalloc_ops = {
+        .allocate = ion_system_contig_heap_allocate,
+        .free = ion_system_contig_heap_free,
+        .phys = ion_system_contig_heap_phys,
+        .map_dma = ion_system_contig_heap_map_dma,
+        .unmap_dma = ion_system_heap_unmap_dma,
+        .map_kernel = ion_system_heap_map_kernel,
+        .unmap_kernel = ion_system_heap_unmap_kernel,
+        .map_user = ion_system_contig_heap_map_user,
+};
+
+struct ion_heap *ion_system_contig_heap_create(struct ion_platform_heap *unused)
+{
+        struct ion_heap *heap;
+
+        heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL);
+        if (!heap)
+                return ERR_PTR(-ENOMEM);
+        heap->ops = &kmalloc_ops;
+        heap->type = ION_HEAP_TYPE_SYSTEM_CONTIG;
+        return heap;
+}
+
+void ion_system_contig_heap_destroy(struct ion_heap *heap)
+{
+        kfree(heap);
+}
+