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authorJonathan Herman <hermanjl@cs.unc.edu>2013-01-22 10:38:37 -0500
committerJonathan Herman <hermanjl@cs.unc.edu>2013-01-22 10:38:37 -0500
commitfcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch)
treea57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/gpu/ion/ion_carveout_heap.c
parent8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff)
Added missing tegra files.HEADmaster
Diffstat (limited to 'drivers/gpu/ion/ion_carveout_heap.c')
-rw-r--r--drivers/gpu/ion/ion_carveout_heap.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/gpu/ion/ion_carveout_heap.c b/drivers/gpu/ion/ion_carveout_heap.c
new file mode 100644
index 00000000000..606adae13f4
--- /dev/null
+++ b/drivers/gpu/ion/ion_carveout_heap.c
@@ -0,0 +1,162 @@
1/*
2 * drivers/gpu/ion/ion_carveout_heap.c
3 *
4 * Copyright (C) 2011 Google, Inc.
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 */
16#include <linux/spinlock.h>
17
18#include <linux/err.h>
19#include <linux/genalloc.h>
20#include <linux/io.h>
21#include <linux/ion.h>
22#include <linux/mm.h>
23#include <linux/scatterlist.h>
24#include <linux/slab.h>
25#include <linux/vmalloc.h>
26#include "ion_priv.h"
27
28#include <asm/mach/map.h>
29
30struct ion_carveout_heap {
31 struct ion_heap heap;
32 struct gen_pool *pool;
33 ion_phys_addr_t base;
34};
35
36ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap,
37 unsigned long size,
38 unsigned long align)
39{
40 struct ion_carveout_heap *carveout_heap =
41 container_of(heap, struct ion_carveout_heap, heap);
42 unsigned long offset = gen_pool_alloc(carveout_heap->pool, size);
43
44 if (!offset)
45 return ION_CARVEOUT_ALLOCATE_FAIL;
46
47 return offset;
48}
49
50void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr,
51 unsigned long size)
52{
53 struct ion_carveout_heap *carveout_heap =
54 container_of(heap, struct ion_carveout_heap, heap);
55
56 if (addr == ION_CARVEOUT_ALLOCATE_FAIL)
57 return;
58 gen_pool_free(carveout_heap->pool, addr, size);
59}
60
61static int ion_carveout_heap_phys(struct ion_heap *heap,
62 struct ion_buffer *buffer,
63 ion_phys_addr_t *addr, size_t *len)
64{
65 *addr = buffer->priv_phys;
66 *len = buffer->size;
67 return 0;
68}
69
70static int ion_carveout_heap_allocate(struct ion_heap *heap,
71 struct ion_buffer *buffer,
72 unsigned long size, unsigned long align,
73 unsigned long flags)
74{
75 buffer->priv_phys = ion_carveout_allocate(heap, size, align);
76 return buffer->priv_phys == ION_CARVEOUT_ALLOCATE_FAIL ? -ENOMEM : 0;
77}
78
79static void ion_carveout_heap_free(struct ion_buffer *buffer)
80{
81 struct ion_heap *heap = buffer->heap;
82
83 ion_carveout_free(heap, buffer->priv_phys, buffer->size);
84 buffer->priv_phys = ION_CARVEOUT_ALLOCATE_FAIL;
85}
86
87struct scatterlist *ion_carveout_heap_map_dma(struct ion_heap *heap,
88 struct ion_buffer *buffer)
89{
90 return ERR_PTR(-EINVAL);
91}
92
93void ion_carveout_heap_unmap_dma(struct ion_heap *heap,
94 struct ion_buffer *buffer)
95{
96 return;
97}
98
99void *ion_carveout_heap_map_kernel(struct ion_heap *heap,
100 struct ion_buffer *buffer)
101{
102 return __arch_ioremap(buffer->priv_phys, buffer->size,
103 MT_MEMORY_NONCACHED);
104}
105
106void ion_carveout_heap_unmap_kernel(struct ion_heap *heap,
107 struct ion_buffer *buffer)
108{
109 __arch_iounmap(buffer->vaddr);
110 buffer->vaddr = NULL;
111 return;
112}
113
114int ion_carveout_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
115 struct vm_area_struct *vma)
116{
117 return remap_pfn_range(vma, vma->vm_start,
118 __phys_to_pfn(buffer->priv_phys) + vma->vm_pgoff,
119 buffer->size,
120 pgprot_noncached(vma->vm_page_prot));
121}
122
123static struct ion_heap_ops carveout_heap_ops = {
124 .allocate = ion_carveout_heap_allocate,
125 .free = ion_carveout_heap_free,
126 .phys = ion_carveout_heap_phys,
127 .map_user = ion_carveout_heap_map_user,
128 .map_kernel = ion_carveout_heap_map_kernel,
129 .unmap_kernel = ion_carveout_heap_unmap_kernel,
130};
131
132struct ion_heap *ion_carveout_heap_create(struct ion_platform_heap *heap_data)
133{
134 struct ion_carveout_heap *carveout_heap;
135
136 carveout_heap = kzalloc(sizeof(struct ion_carveout_heap), GFP_KERNEL);
137 if (!carveout_heap)
138 return ERR_PTR(-ENOMEM);
139
140 carveout_heap->pool = gen_pool_create(12, -1);
141 if (!carveout_heap->pool) {
142 kfree(carveout_heap);
143 return ERR_PTR(-ENOMEM);
144 }
145 carveout_heap->base = heap_data->base;
146 gen_pool_add(carveout_heap->pool, carveout_heap->base, heap_data->size,
147 -1);
148 carveout_heap->heap.ops = &carveout_heap_ops;
149 carveout_heap->heap.type = ION_HEAP_TYPE_CARVEOUT;
150
151 return &carveout_heap->heap;
152}
153
154void ion_carveout_heap_destroy(struct ion_heap *heap)
155{
156 struct ion_carveout_heap *carveout_heap =
157 container_of(heap, struct ion_carveout_heap, heap);
158
159 gen_pool_destroy(carveout_heap->pool);
160 kfree(carveout_heap);
161 carveout_heap = NULL;
162}