John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 1 | /* |
| 2 | * drivers/gpu/ion/ion_dummy_driver.c |
| 3 | * |
| 4 | * Copyright (C) 2013 Linaro, 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 | |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/bootmem.h> |
| 21 | #include <linux/memblock.h> |
| 22 | #include <linux/sizes.h> |
| 23 | #include "ion.h" |
| 24 | #include "ion_priv.h" |
| 25 | |
Wei Yongjun | 3a915dd | 2014-01-14 10:04:49 +0800 | [diff] [blame^] | 26 | static struct ion_device *idev; |
| 27 | static struct ion_heap **heaps; |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 28 | |
Wei Yongjun | 3a915dd | 2014-01-14 10:04:49 +0800 | [diff] [blame^] | 29 | static void *carveout_ptr; |
| 30 | static void *chunk_ptr; |
John Stultz | 4c45b1a | 2014-01-09 21:08:38 -0800 | [diff] [blame] | 31 | |
Wei Yongjun | 3a915dd | 2014-01-14 10:04:49 +0800 | [diff] [blame^] | 32 | static struct ion_platform_heap dummy_heaps[] = { |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 33 | { |
| 34 | .id = ION_HEAP_TYPE_SYSTEM, |
| 35 | .type = ION_HEAP_TYPE_SYSTEM, |
| 36 | .name = "system", |
| 37 | }, |
| 38 | { |
| 39 | .id = ION_HEAP_TYPE_SYSTEM_CONTIG, |
| 40 | .type = ION_HEAP_TYPE_SYSTEM_CONTIG, |
| 41 | .name = "system contig", |
| 42 | }, |
John Stultz | 4c45b1a | 2014-01-09 21:08:38 -0800 | [diff] [blame] | 43 | { |
| 44 | .id = ION_HEAP_TYPE_CARVEOUT, |
| 45 | .type = ION_HEAP_TYPE_CARVEOUT, |
| 46 | .name = "carveout", |
| 47 | .size = SZ_4M, |
| 48 | }, |
| 49 | { |
| 50 | .id = ION_HEAP_TYPE_CHUNK, |
| 51 | .type = ION_HEAP_TYPE_CHUNK, |
| 52 | .name = "chunk", |
| 53 | .size = SZ_4M, |
| 54 | .align = SZ_16K, |
| 55 | .priv = (void *)(SZ_16K), |
| 56 | }, |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 57 | }; |
| 58 | |
Wei Yongjun | 3a915dd | 2014-01-14 10:04:49 +0800 | [diff] [blame^] | 59 | static struct ion_platform_data dummy_ion_pdata = { |
John Stultz | 4c45b1a | 2014-01-09 21:08:38 -0800 | [diff] [blame] | 60 | .nr = 4, |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 61 | .heaps = dummy_heaps, |
| 62 | }; |
| 63 | |
| 64 | static int __init ion_dummy_init(void) |
| 65 | { |
| 66 | int i, err; |
| 67 | |
| 68 | idev = ion_device_create(NULL); |
| 69 | heaps = kzalloc(sizeof(struct ion_heap *) * dummy_ion_pdata.nr, |
| 70 | GFP_KERNEL); |
| 71 | if (!heaps) |
| 72 | return PTR_ERR(heaps); |
| 73 | |
John Stultz | 4c45b1a | 2014-01-09 21:08:38 -0800 | [diff] [blame] | 74 | |
| 75 | /* Allocate a dummy carveout heap */ |
| 76 | carveout_ptr = alloc_pages_exact( |
| 77 | dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size, |
| 78 | GFP_KERNEL); |
| 79 | if (carveout_ptr) |
| 80 | dummy_heaps[ION_HEAP_TYPE_CARVEOUT].base = |
| 81 | virt_to_phys(carveout_ptr); |
| 82 | else |
| 83 | pr_err("ion_dummy: Could not allocate carveout\n"); |
| 84 | |
| 85 | /* Allocate a dummy chunk heap */ |
| 86 | chunk_ptr = alloc_pages_exact( |
| 87 | dummy_heaps[ION_HEAP_TYPE_CHUNK].size, |
| 88 | GFP_KERNEL); |
| 89 | if (chunk_ptr) |
| 90 | dummy_heaps[ION_HEAP_TYPE_CHUNK].base = virt_to_phys(chunk_ptr); |
| 91 | else |
| 92 | pr_err("ion_dummy: Could not allocate chunk\n"); |
| 93 | |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 94 | for (i = 0; i < dummy_ion_pdata.nr; i++) { |
| 95 | struct ion_platform_heap *heap_data = &dummy_ion_pdata.heaps[i]; |
| 96 | |
John Stultz | 4c45b1a | 2014-01-09 21:08:38 -0800 | [diff] [blame] | 97 | if (heap_data->type == ION_HEAP_TYPE_CARVEOUT && |
| 98 | !heap_data->base) |
| 99 | continue; |
| 100 | |
| 101 | if (heap_data->type == ION_HEAP_TYPE_CHUNK && !heap_data->base) |
| 102 | continue; |
| 103 | |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 104 | heaps[i] = ion_heap_create(heap_data); |
| 105 | if (IS_ERR_OR_NULL(heaps[i])) { |
| 106 | err = PTR_ERR(heaps[i]); |
| 107 | goto err; |
| 108 | } |
| 109 | ion_device_add_heap(idev, heaps[i]); |
| 110 | } |
| 111 | return 0; |
| 112 | err: |
| 113 | for (i = 0; i < dummy_ion_pdata.nr; i++) { |
| 114 | if (heaps[i]) |
| 115 | ion_heap_destroy(heaps[i]); |
| 116 | } |
| 117 | kfree(heaps); |
| 118 | |
John Stultz | 4c45b1a | 2014-01-09 21:08:38 -0800 | [diff] [blame] | 119 | if (carveout_ptr) { |
| 120 | free_pages_exact(carveout_ptr, |
| 121 | dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size); |
| 122 | carveout_ptr = NULL; |
| 123 | } |
| 124 | if (chunk_ptr) { |
| 125 | free_pages_exact(chunk_ptr, |
| 126 | dummy_heaps[ION_HEAP_TYPE_CHUNK].size); |
| 127 | chunk_ptr = NULL; |
| 128 | } |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 129 | return err; |
| 130 | } |
| 131 | |
| 132 | static void __exit ion_dummy_exit(void) |
| 133 | { |
| 134 | int i; |
| 135 | |
| 136 | ion_device_destroy(idev); |
| 137 | |
| 138 | for (i = 0; i < dummy_ion_pdata.nr; i++) |
| 139 | ion_heap_destroy(heaps[i]); |
| 140 | kfree(heaps); |
| 141 | |
John Stultz | 4c45b1a | 2014-01-09 21:08:38 -0800 | [diff] [blame] | 142 | if (carveout_ptr) { |
| 143 | free_pages_exact(carveout_ptr, |
| 144 | dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size); |
| 145 | carveout_ptr = NULL; |
| 146 | } |
| 147 | if (chunk_ptr) { |
| 148 | free_pages_exact(chunk_ptr, |
| 149 | dummy_heaps[ION_HEAP_TYPE_CHUNK].size); |
| 150 | chunk_ptr = NULL; |
| 151 | } |
| 152 | |
John Stultz | 1184ead | 2014-01-09 21:08:37 -0800 | [diff] [blame] | 153 | return; |
| 154 | } |
| 155 | |
| 156 | module_init(ion_dummy_init); |
| 157 | module_exit(ion_dummy_exit); |
| 158 | |