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3031 | serge | 1 | /* |
2 | * Copyright © 2008-2012 Intel Corporation |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice (including the next |
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12 | * paragraph) shall be included in all copies or substantial portions of the |
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13 | * Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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21 | * IN THE SOFTWARE. |
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22 | * |
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23 | * Authors: |
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24 | * Eric Anholt |
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25 | * Chris Wilson |
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26 | * |
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27 | */ |
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28 | |||
29 | #include |
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30 | #include |
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31 | #include "i915_drv.h" |
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32 | |||
33 | /* |
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34 | * The BIOS typically reserves some of the system's memory for the exclusive |
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35 | * use of the integrated graphics. This memory is no longer available for |
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36 | * use by the OS and so the user finds that his system has less memory |
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37 | * available than he put in. We refer to this memory as stolen. |
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38 | * |
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39 | * The BIOS will allocate its framebuffer from the stolen memory. Our |
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40 | * goal is try to reuse that object for our own fbcon which must always |
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41 | * be available for panics. Anything else we can reuse the stolen memory |
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42 | * for is a boon. |
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43 | */ |
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44 | |||
3480 | Serge | 45 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
3031 | serge | 46 | { |
47 | struct drm_i915_private *dev_priv = dev->dev_private; |
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4104 | Serge | 48 | struct resource *r; |
3031 | serge | 49 | u32 base; |
50 | |||
4104 | Serge | 51 | /* Almost universally we can find the Graphics Base of Stolen Memory |
52 | * at offset 0x5c in the igfx configuration space. On a few (desktop) |
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53 | * machines this is also mirrored in the bridge device at different |
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54 | * locations, or in the MCHBAR. On gen2, the layout is again slightly |
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55 | * different with the Graphics Segment immediately following Top of |
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56 | * Memory (or Top of Usable DRAM). Note it appears that TOUD is only |
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57 | * reported by 865g, so we just use the top of memory as determined |
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58 | * by the e820 probe. |
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3480 | Serge | 59 | * |
4104 | Serge | 60 | * XXX However gen2 requires an unavailable symbol. |
3031 | serge | 61 | */ |
3480 | Serge | 62 | base = 0; |
4104 | Serge | 63 | if (INTEL_INFO(dev)->gen >= 3) { |
3480 | Serge | 64 | /* Read Graphics Base of Stolen Memory directly */ |
4104 | Serge | 65 | pci_read_config_dword(dev->pdev, 0x5c, &base); |
66 | base &= ~((1<<20) - 1); |
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67 | } else { /* GEN2 */ |
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3480 | Serge | 68 | #if 0 |
69 | /* Stolen is immediately above Top of Memory */ |
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70 | base = max_low_pfn_mapped << PAGE_SHIFT; |
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3031 | serge | 71 | #endif |
3480 | Serge | 72 | } |
3031 | serge | 73 | |
4104 | Serge | 74 | if (base == 0) |
75 | return 0; |
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5060 | serge | 76 | |
77 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
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78 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { |
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79 | struct { |
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80 | u32 start, end; |
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81 | } stolen[2] = { |
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82 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, |
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83 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, |
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84 | }; |
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85 | u64 gtt_start, gtt_end; |
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86 | |||
87 | gtt_start = I915_READ(PGTBL_CTL); |
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88 | if (IS_GEN4(dev)) |
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89 | gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) | |
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90 | (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28; |
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91 | else |
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92 | gtt_start &= PGTBL_ADDRESS_LO_MASK; |
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93 | gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4; |
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94 | |||
95 | if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end) |
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96 | stolen[0].end = gtt_start; |
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97 | if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end) |
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98 | stolen[1].start = gtt_end; |
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99 | |||
100 | /* pick the larger of the two chunks */ |
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101 | if (stolen[0].end - stolen[0].start > |
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102 | stolen[1].end - stolen[1].start) { |
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103 | base = stolen[0].start; |
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104 | dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start; |
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105 | } else { |
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106 | base = stolen[1].start; |
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107 | dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start; |
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108 | } |
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109 | |||
110 | if (stolen[0].start != stolen[1].start || |
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111 | stolen[0].end != stolen[1].end) { |
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112 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", |
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113 | (unsigned long long) gtt_start, |
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114 | (unsigned long long) gtt_end - 1); |
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115 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", |
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116 | base, base + (u32) dev_priv->gtt.stolen_size - 1); |
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117 | } |
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118 | } |
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119 | |||
4104 | Serge | 120 | #if 0 |
5060 | serge | 121 | |
4104 | Serge | 122 | /* Verify that nothing else uses this physical address. Stolen |
123 | * memory should be reserved by the BIOS and hidden from the |
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124 | * kernel. So if the region is already marked as busy, something |
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125 | * is seriously wrong. |
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126 | */ |
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127 | r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size, |
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128 | "Graphics Stolen Memory"); |
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129 | if (r == NULL) { |
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130 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
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131 | base, base + (uint32_t)dev_priv->gtt.stolen_size); |
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132 | base = 0; |
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133 | } |
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134 | #endif |
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3480 | Serge | 135 | return base; |
3031 | serge | 136 | } |
137 | |||
5060 | serge | 138 | static int find_compression_threshold(struct drm_device *dev, |
139 | struct drm_mm_node *node, |
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140 | int size, |
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141 | int fb_cpp) |
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3031 | serge | 142 | { |
143 | struct drm_i915_private *dev_priv = dev->dev_private; |
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5060 | serge | 144 | int compression_threshold = 1; |
4104 | Serge | 145 | int ret; |
3031 | serge | 146 | |
5060 | serge | 147 | /* HACK: This code depends on what we will do in *_enable_fbc. If that |
148 | * code changes, this code needs to change as well. |
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149 | * |
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150 | * The enable_fbc code will attempt to use one of our 2 compression |
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151 | * thresholds, therefore, in that case, we only have 1 resort. |
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152 | */ |
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3031 | serge | 153 | |
5060 | serge | 154 | /* Try to over-allocate to reduce reallocations and fragmentation. */ |
155 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, |
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4104 | Serge | 156 | size <<= 1, 4096, DRM_MM_SEARCH_DEFAULT); |
5060 | serge | 157 | if (ret == 0) |
158 | return compression_threshold; |
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159 | |||
160 | again: |
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161 | /* HW's ability to limit the CFB is 1:4 */ |
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162 | if (compression_threshold > 4 || |
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163 | (fb_cpp == 2 && compression_threshold == 2)) |
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164 | return 0; |
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165 | |||
166 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, |
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4104 | Serge | 167 | size >>= 1, 4096, |
168 | DRM_MM_SEARCH_DEFAULT); |
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5060 | serge | 169 | if (ret && INTEL_INFO(dev)->gen <= 4) { |
170 | return 0; |
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171 | } else if (ret) { |
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172 | compression_threshold <<= 1; |
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173 | goto again; |
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174 | } else { |
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175 | return compression_threshold; |
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176 | } |
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177 | } |
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178 | |||
179 | static int i915_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
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180 | { |
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181 | struct drm_i915_private *dev_priv = dev->dev_private; |
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182 | struct drm_mm_node *uninitialized_var(compressed_llb); |
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183 | int ret; |
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184 | |||
185 | ret = find_compression_threshold(dev, &dev_priv->fbc.compressed_fb, |
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186 | size, fb_cpp); |
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187 | if (!ret) |
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4104 | Serge | 188 | goto err_llb; |
5060 | serge | 189 | else if (ret > 1) { |
190 | DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n"); |
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4104 | Serge | 191 | |
5060 | serge | 192 | } |
193 | |||
194 | dev_priv->fbc.threshold = ret; |
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195 | |||
3480 | Serge | 196 | if (HAS_PCH_SPLIT(dev)) |
5060 | serge | 197 | I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
3480 | Serge | 198 | else if (IS_GM45(dev)) { |
5060 | serge | 199 | I915_WRITE(DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
3480 | Serge | 200 | } else { |
4104 | Serge | 201 | compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL); |
3031 | serge | 202 | if (!compressed_llb) |
203 | goto err_fb; |
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204 | |||
4104 | Serge | 205 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, compressed_llb, |
206 | 4096, 4096, DRM_MM_SEARCH_DEFAULT); |
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207 | if (ret) |
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208 | goto err_fb; |
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3480 | Serge | 209 | |
4104 | Serge | 210 | dev_priv->fbc.compressed_llb = compressed_llb; |
211 | |||
3480 | Serge | 212 | I915_WRITE(FBC_CFB_BASE, |
5060 | serge | 213 | dev_priv->mm.stolen_base + dev_priv->fbc.compressed_fb.start); |
3480 | Serge | 214 | I915_WRITE(FBC_LL_BASE, |
215 | dev_priv->mm.stolen_base + compressed_llb->start); |
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3031 | serge | 216 | } |
217 | |||
5060 | serge | 218 | dev_priv->fbc.size = size / dev_priv->fbc.threshold; |
3031 | serge | 219 | |
3480 | Serge | 220 | DRM_DEBUG_KMS("reserved %d bytes of contiguous stolen space for FBC\n", |
221 | size); |
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3031 | serge | 222 | |
3480 | Serge | 223 | return 0; |
3031 | serge | 224 | |
225 | err_fb: |
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4104 | Serge | 226 | kfree(compressed_llb); |
5060 | serge | 227 | drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
4104 | Serge | 228 | err_llb: |
3480 | Serge | 229 | return -ENOSPC; |
3031 | serge | 230 | } |
231 | |||
5060 | serge | 232 | int i915_gem_stolen_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
3031 | serge | 233 | { |
234 | struct drm_i915_private *dev_priv = dev->dev_private; |
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235 | |||
4104 | Serge | 236 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
3480 | Serge | 237 | return -ENODEV; |
238 | |||
4104 | Serge | 239 | if (size < dev_priv->fbc.size) |
3480 | Serge | 240 | return 0; |
241 | |||
242 | /* Release any current block */ |
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243 | i915_gem_stolen_cleanup_compression(dev); |
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244 | |||
5060 | serge | 245 | return i915_setup_compression(dev, size, fb_cpp); |
3480 | Serge | 246 | } |
247 | |||
248 | void i915_gem_stolen_cleanup_compression(struct drm_device *dev) |
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249 | { |
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250 | struct drm_i915_private *dev_priv = dev->dev_private; |
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251 | |||
4104 | Serge | 252 | if (dev_priv->fbc.size == 0) |
3480 | Serge | 253 | return; |
254 | |||
5060 | serge | 255 | drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
3480 | Serge | 256 | |
4104 | Serge | 257 | if (dev_priv->fbc.compressed_llb) { |
258 | drm_mm_remove_node(dev_priv->fbc.compressed_llb); |
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259 | kfree(dev_priv->fbc.compressed_llb); |
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260 | } |
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3480 | Serge | 261 | |
4104 | Serge | 262 | dev_priv->fbc.size = 0; |
3031 | serge | 263 | } |
264 | |||
265 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
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266 | { |
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3480 | Serge | 267 | struct drm_i915_private *dev_priv = dev->dev_private; |
268 | |||
4104 | Serge | 269 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
270 | return; |
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271 | |||
3480 | Serge | 272 | i915_gem_stolen_cleanup_compression(dev); |
273 | drm_mm_takedown(&dev_priv->mm.stolen); |
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3031 | serge | 274 | } |
275 | |||
276 | int i915_gem_init_stolen(struct drm_device *dev) |
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277 | { |
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278 | struct drm_i915_private *dev_priv = dev->dev_private; |
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5354 | serge | 279 | u32 tmp; |
4104 | Serge | 280 | int bios_reserved = 0; |
3031 | serge | 281 | |
5060 | serge | 282 | #ifdef CONFIG_INTEL_IOMMU |
283 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
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284 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
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285 | return 0; |
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286 | } |
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287 | #endif |
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288 | |||
4104 | Serge | 289 | if (dev_priv->gtt.stolen_size == 0) |
290 | return 0; |
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291 | |||
3480 | Serge | 292 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
293 | if (dev_priv->mm.stolen_base == 0) |
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294 | return 0; |
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295 | |||
296 | DRM_DEBUG_KMS("found %zd bytes of stolen memory at %08lx\n", |
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297 | dev_priv->gtt.stolen_size, dev_priv->mm.stolen_base); |
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298 | |||
5354 | serge | 299 | if (INTEL_INFO(dev)->gen >= 8) { |
300 | tmp = I915_READ(GEN7_BIOS_RESERVED); |
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301 | tmp >>= GEN8_BIOS_RESERVED_SHIFT; |
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302 | tmp &= GEN8_BIOS_RESERVED_MASK; |
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303 | bios_reserved = (1024*1024) << tmp; |
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304 | } else if (IS_GEN7(dev)) { |
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305 | tmp = I915_READ(GEN7_BIOS_RESERVED); |
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306 | bios_reserved = tmp & GEN7_BIOS_RESERVED_256K ? |
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307 | 256*1024 : 1024*1024; |
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308 | } |
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4104 | Serge | 309 | |
310 | if (WARN_ON(bios_reserved > dev_priv->gtt.stolen_size)) |
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311 | return 0; |
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312 | |||
3031 | serge | 313 | /* Basic memrange allocator for stolen space */ |
4104 | Serge | 314 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size - |
315 | bios_reserved); |
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3031 | serge | 316 | |
3480 | Serge | 317 | return 0; |
318 | } |
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3031 | serge | 319 | |
3480 | Serge | 320 | static struct sg_table * |
321 | i915_pages_create_for_stolen(struct drm_device *dev, |
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322 | u32 offset, u32 size) |
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323 | { |
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324 | struct drm_i915_private *dev_priv = dev->dev_private; |
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325 | struct sg_table *st; |
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326 | struct scatterlist *sg; |
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3031 | serge | 327 | |
3480 | Serge | 328 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); |
329 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
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330 | |||
331 | /* We hide that we have no struct page backing our stolen object |
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332 | * by wrapping the contiguous physical allocation with a fake |
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333 | * dma mapping in a single scatterlist. |
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334 | */ |
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335 | |||
336 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
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337 | if (st == NULL) |
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338 | return NULL; |
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339 | |||
340 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { |
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341 | kfree(st); |
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342 | return NULL; |
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3031 | serge | 343 | } |
344 | |||
3480 | Serge | 345 | sg = st->sgl; |
4560 | Serge | 346 | sg->offset = 0; |
3480 | Serge | 347 | sg->length = size; |
348 | |||
349 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; |
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350 | sg_dma_len(sg) = size; |
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351 | |||
352 | return st; |
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3031 | serge | 353 | } |
3480 | Serge | 354 | |
355 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) |
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356 | { |
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357 | BUG(); |
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358 | return -EINVAL; |
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359 | } |
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360 | |||
361 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) |
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362 | { |
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363 | /* Should only be called during free */ |
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364 | sg_free_table(obj->pages); |
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365 | kfree(obj->pages); |
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366 | } |
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367 | |||
5060 | serge | 368 | |
369 | static void |
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370 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) |
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371 | { |
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372 | if (obj->stolen) { |
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373 | drm_mm_remove_node(obj->stolen); |
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374 | kfree(obj->stolen); |
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375 | obj->stolen = NULL; |
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376 | } |
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377 | } |
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3480 | Serge | 378 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
379 | .get_pages = i915_gem_object_get_pages_stolen, |
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380 | .put_pages = i915_gem_object_put_pages_stolen, |
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5060 | serge | 381 | .release = i915_gem_object_release_stolen, |
3480 | Serge | 382 | }; |
383 | |||
384 | static struct drm_i915_gem_object * |
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385 | _i915_gem_object_create_stolen(struct drm_device *dev, |
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386 | struct drm_mm_node *stolen) |
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387 | { |
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388 | struct drm_i915_gem_object *obj; |
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389 | |||
390 | obj = i915_gem_object_alloc(dev); |
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391 | if (obj == NULL) |
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392 | return NULL; |
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393 | |||
4104 | Serge | 394 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
3480 | Serge | 395 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
396 | |||
397 | obj->pages = i915_pages_create_for_stolen(dev, |
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398 | stolen->start, stolen->size); |
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399 | if (obj->pages == NULL) |
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400 | goto cleanup; |
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401 | |||
402 | obj->has_dma_mapping = true; |
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4104 | Serge | 403 | i915_gem_object_pin_pages(obj); |
3480 | Serge | 404 | obj->stolen = stolen; |
405 | |||
4104 | Serge | 406 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
407 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; |
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3480 | Serge | 408 | |
409 | return obj; |
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410 | |||
411 | cleanup: |
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412 | i915_gem_object_free(obj); |
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413 | return NULL; |
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414 | } |
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415 | |||
416 | struct drm_i915_gem_object * |
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417 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) |
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418 | { |
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419 | struct drm_i915_private *dev_priv = dev->dev_private; |
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420 | struct drm_i915_gem_object *obj; |
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421 | struct drm_mm_node *stolen; |
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4104 | Serge | 422 | int ret; |
3480 | Serge | 423 | |
4104 | Serge | 424 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
3480 | Serge | 425 | return NULL; |
426 | |||
427 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); |
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428 | if (size == 0) |
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429 | return NULL; |
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430 | |||
4104 | Serge | 431 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
432 | if (!stolen) |
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3480 | Serge | 433 | return NULL; |
434 | |||
4104 | Serge | 435 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, stolen, size, |
436 | 4096, DRM_MM_SEARCH_DEFAULT); |
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437 | if (ret) { |
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438 | kfree(stolen); |
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439 | return NULL; |
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440 | } |
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441 | |||
3480 | Serge | 442 | obj = _i915_gem_object_create_stolen(dev, stolen); |
443 | if (obj) |
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444 | return obj; |
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445 | |||
4104 | Serge | 446 | drm_mm_remove_node(stolen); |
447 | kfree(stolen); |
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3480 | Serge | 448 | return NULL; |
449 | } |
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450 | |||
3764 | Serge | 451 | struct drm_i915_gem_object * |
452 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, |
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453 | u32 stolen_offset, |
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454 | u32 gtt_offset, |
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455 | u32 size) |
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456 | { |
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457 | struct drm_i915_private *dev_priv = dev->dev_private; |
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4104 | Serge | 458 | struct i915_address_space *ggtt = &dev_priv->gtt.base; |
3764 | Serge | 459 | struct drm_i915_gem_object *obj; |
460 | struct drm_mm_node *stolen; |
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4104 | Serge | 461 | struct i915_vma *vma; |
462 | int ret; |
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3764 | Serge | 463 | |
4104 | Serge | 464 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
3764 | Serge | 465 | return NULL; |
466 | |||
467 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", |
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468 | stolen_offset, gtt_offset, size); |
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469 | |||
470 | /* KISS and expect everything to be page-aligned */ |
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471 | BUG_ON(stolen_offset & 4095); |
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472 | BUG_ON(size & 4095); |
||
473 | |||
474 | if (WARN_ON(size == 0)) |
||
475 | return NULL; |
||
476 | |||
4104 | Serge | 477 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
478 | if (!stolen) |
||
479 | return NULL; |
||
480 | |||
481 | stolen->start = stolen_offset; |
||
482 | stolen->size = size; |
||
483 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
||
484 | if (ret) { |
||
3764 | Serge | 485 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
4104 | Serge | 486 | kfree(stolen); |
3764 | Serge | 487 | return NULL; |
488 | } |
||
489 | |||
490 | obj = _i915_gem_object_create_stolen(dev, stolen); |
||
491 | if (obj == NULL) { |
||
492 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); |
||
4104 | Serge | 493 | drm_mm_remove_node(stolen); |
494 | kfree(stolen); |
||
3764 | Serge | 495 | return NULL; |
496 | } |
||
497 | |||
4104 | Serge | 498 | /* Some objects just need physical mem from stolen space */ |
499 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
||
500 | return obj; |
||
501 | |||
4560 | Serge | 502 | vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
4104 | Serge | 503 | if (IS_ERR(vma)) { |
504 | ret = PTR_ERR(vma); |
||
505 | goto err_out; |
||
506 | } |
||
507 | |||
3764 | Serge | 508 | /* To simplify the initialisation sequence between KMS and GTT, |
509 | * we allow construction of the stolen object prior to |
||
510 | * setting up the GTT space. The actual reservation will occur |
||
511 | * later. |
||
512 | */ |
||
4104 | Serge | 513 | vma->node.start = gtt_offset; |
514 | vma->node.size = size; |
||
515 | if (drm_mm_initialized(&ggtt->mm)) { |
||
516 | ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); |
||
517 | if (ret) { |
||
3764 | Serge | 518 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
4104 | Serge | 519 | goto err_vma; |
3764 | Serge | 520 | } |
4104 | Serge | 521 | } |
3764 | Serge | 522 | |
5354 | serge | 523 | vma->bound |= GLOBAL_BIND; |
3764 | Serge | 524 | |
4104 | Serge | 525 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
526 | list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
||
4560 | Serge | 527 | i915_gem_object_pin_pages(obj); |
3764 | Serge | 528 | |
529 | return obj; |
||
4104 | Serge | 530 | |
531 | err_vma: |
||
532 | i915_gem_vma_destroy(vma); |
||
533 | err_out: |
||
534 | drm_mm_remove_node(stolen); |
||
535 | kfree(stolen); |
||
536 | drm_gem_object_unreference(&obj->base); |
||
537 | return NULL; |
||
3764 | Serge | 538 | }><>>>=><=>=>=><=>=>>><>=>><>20)><20)> |