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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 | |||
6084 | serge | 33 | #define KB(x) ((x) * 1024) |
34 | #define MB(x) (KB(x) * 1024) |
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35 | |||
3031 | serge | 36 | /* |
37 | * The BIOS typically reserves some of the system's memory for the exclusive |
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38 | * use of the integrated graphics. This memory is no longer available for |
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39 | * use by the OS and so the user finds that his system has less memory |
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40 | * available than he put in. We refer to this memory as stolen. |
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41 | * |
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42 | * The BIOS will allocate its framebuffer from the stolen memory. Our |
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43 | * goal is try to reuse that object for our own fbcon which must always |
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44 | * be available for panics. Anything else we can reuse the stolen memory |
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45 | * for is a boon. |
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46 | */ |
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47 | |||
6084 | serge | 48 | int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv, |
49 | struct drm_mm_node *node, u64 size, |
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50 | unsigned alignment, u64 start, u64 end) |
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51 | { |
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52 | int ret; |
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53 | |||
54 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
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55 | return -ENODEV; |
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56 | |||
57 | /* See the comment at the drm_mm_init() call for more about this check. |
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58 | * WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */ |
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59 | if (INTEL_INFO(dev_priv)->gen == 8 && start < 4096) |
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60 | start = 4096; |
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61 | |||
62 | mutex_lock(&dev_priv->mm.stolen_lock); |
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63 | ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size, |
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64 | alignment, start, end, |
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65 | DRM_MM_SEARCH_DEFAULT); |
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66 | mutex_unlock(&dev_priv->mm.stolen_lock); |
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67 | |||
68 | return ret; |
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69 | } |
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70 | |||
71 | int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
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72 | struct drm_mm_node *node, u64 size, |
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73 | unsigned alignment) |
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74 | { |
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75 | return i915_gem_stolen_insert_node_in_range(dev_priv, node, size, |
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76 | alignment, 0, |
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77 | dev_priv->gtt.stolen_usable_size); |
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78 | } |
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79 | |||
80 | void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, |
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81 | struct drm_mm_node *node) |
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82 | { |
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83 | mutex_lock(&dev_priv->mm.stolen_lock); |
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84 | drm_mm_remove_node(node); |
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85 | mutex_unlock(&dev_priv->mm.stolen_lock); |
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86 | } |
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87 | |||
3480 | Serge | 88 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
3031 | serge | 89 | { |
90 | struct drm_i915_private *dev_priv = dev->dev_private; |
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4104 | Serge | 91 | struct resource *r; |
3031 | serge | 92 | u32 base; |
93 | |||
4104 | Serge | 94 | /* Almost universally we can find the Graphics Base of Stolen Memory |
95 | * at offset 0x5c in the igfx configuration space. On a few (desktop) |
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96 | * machines this is also mirrored in the bridge device at different |
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6084 | serge | 97 | * locations, or in the MCHBAR. |
3480 | Serge | 98 | * |
6084 | serge | 99 | * On 865 we just check the TOUD register. |
100 | * |
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101 | * On 830/845/85x the stolen memory base isn't available in any |
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102 | * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. |
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103 | * |
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3031 | serge | 104 | */ |
3480 | Serge | 105 | base = 0; |
4104 | Serge | 106 | if (INTEL_INFO(dev)->gen >= 3) { |
3480 | Serge | 107 | /* Read Graphics Base of Stolen Memory directly */ |
4104 | Serge | 108 | pci_read_config_dword(dev->pdev, 0x5c, &base); |
109 | base &= ~((1<<20) - 1); |
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110 | } else { /* GEN2 */ |
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3480 | Serge | 111 | #if 0 |
112 | /* Stolen is immediately above Top of Memory */ |
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113 | base = max_low_pfn_mapped << PAGE_SHIFT; |
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3031 | serge | 114 | #endif |
3480 | Serge | 115 | } |
3031 | serge | 116 | |
4104 | Serge | 117 | if (base == 0) |
118 | return 0; |
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5060 | serge | 119 | |
120 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
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121 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { |
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122 | struct { |
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123 | u32 start, end; |
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124 | } stolen[2] = { |
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125 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, |
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126 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, |
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127 | }; |
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128 | u64 gtt_start, gtt_end; |
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129 | |||
130 | gtt_start = I915_READ(PGTBL_CTL); |
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131 | if (IS_GEN4(dev)) |
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132 | gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) | |
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133 | (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28; |
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134 | else |
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135 | gtt_start &= PGTBL_ADDRESS_LO_MASK; |
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136 | gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4; |
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137 | |||
138 | if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end) |
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139 | stolen[0].end = gtt_start; |
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140 | if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end) |
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141 | stolen[1].start = gtt_end; |
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142 | |||
143 | /* pick the larger of the two chunks */ |
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144 | if (stolen[0].end - stolen[0].start > |
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145 | stolen[1].end - stolen[1].start) { |
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146 | base = stolen[0].start; |
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147 | dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start; |
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148 | } else { |
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149 | base = stolen[1].start; |
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150 | dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start; |
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151 | } |
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152 | |||
153 | if (stolen[0].start != stolen[1].start || |
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154 | stolen[0].end != stolen[1].end) { |
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155 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", |
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156 | (unsigned long long) gtt_start, |
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157 | (unsigned long long) gtt_end - 1); |
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158 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", |
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159 | base, base + (u32) dev_priv->gtt.stolen_size - 1); |
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160 | } |
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161 | } |
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162 | |||
4104 | Serge | 163 | #if 0 |
5060 | serge | 164 | |
4104 | Serge | 165 | /* Verify that nothing else uses this physical address. Stolen |
166 | * memory should be reserved by the BIOS and hidden from the |
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167 | * kernel. So if the region is already marked as busy, something |
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168 | * is seriously wrong. |
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169 | */ |
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170 | r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size, |
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171 | "Graphics Stolen Memory"); |
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172 | if (r == NULL) { |
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5367 | serge | 173 | /* |
174 | * One more attempt but this time requesting region from |
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175 | * base + 1, as we have seen that this resolves the region |
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176 | * conflict with the PCI Bus. |
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177 | * This is a BIOS w/a: Some BIOS wrap stolen in the root |
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178 | * PCI bus, but have an off-by-one error. Hence retry the |
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179 | * reservation starting from 1 instead of 0. |
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180 | */ |
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181 | r = devm_request_mem_region(dev->dev, base + 1, |
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182 | dev_priv->gtt.stolen_size - 1, |
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183 | "Graphics Stolen Memory"); |
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184 | /* |
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185 | * GEN3 firmware likes to smash pci bridges into the stolen |
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186 | * range. Apparently this works. |
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187 | */ |
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188 | if (r == NULL && !IS_GEN3(dev)) { |
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6084 | serge | 189 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
190 | base, base + (uint32_t)dev_priv->gtt.stolen_size); |
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191 | base = 0; |
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192 | } |
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4104 | Serge | 193 | } |
194 | #endif |
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3480 | Serge | 195 | return base; |
3031 | serge | 196 | } |
197 | |||
6084 | serge | 198 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
3031 | serge | 199 | { |
200 | struct drm_i915_private *dev_priv = dev->dev_private; |
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201 | |||
6084 | serge | 202 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
203 | return; |
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3031 | serge | 204 | |
6084 | serge | 205 | drm_mm_takedown(&dev_priv->mm.stolen); |
5060 | serge | 206 | } |
207 | |||
6084 | serge | 208 | static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
209 | unsigned long *base, unsigned long *size) |
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5060 | serge | 210 | { |
6084 | serge | 211 | uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? |
212 | CTG_STOLEN_RESERVED : |
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213 | ELK_STOLEN_RESERVED); |
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214 | unsigned long stolen_top = dev_priv->mm.stolen_base + |
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215 | dev_priv->gtt.stolen_size; |
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5060 | serge | 216 | |
6084 | serge | 217 | *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; |
4104 | Serge | 218 | |
6084 | serge | 219 | WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); |
5060 | serge | 220 | |
6084 | serge | 221 | /* On these platforms, the register doesn't have a size field, so the |
222 | * size is the distance between the base and the top of the stolen |
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223 | * memory. We also have the genuine case where base is zero and there's |
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224 | * nothing reserved. */ |
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225 | if (*base == 0) |
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226 | *size = 0; |
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227 | else |
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228 | *size = stolen_top - *base; |
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229 | } |
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5060 | serge | 230 | |
6084 | serge | 231 | static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
232 | unsigned long *base, unsigned long *size) |
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233 | { |
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234 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
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3031 | serge | 235 | |
6084 | serge | 236 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
3480 | Serge | 237 | |
6084 | serge | 238 | switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { |
239 | case GEN6_STOLEN_RESERVED_1M: |
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240 | *size = 1024 * 1024; |
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241 | break; |
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242 | case GEN6_STOLEN_RESERVED_512K: |
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243 | *size = 512 * 1024; |
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244 | break; |
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245 | case GEN6_STOLEN_RESERVED_256K: |
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246 | *size = 256 * 1024; |
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247 | break; |
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248 | case GEN6_STOLEN_RESERVED_128K: |
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249 | *size = 128 * 1024; |
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250 | break; |
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251 | default: |
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252 | *size = 1024 * 1024; |
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253 | MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); |
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3031 | serge | 254 | } |
255 | } |
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256 | |||
6084 | serge | 257 | static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, |
258 | unsigned long *base, unsigned long *size) |
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3031 | serge | 259 | { |
6084 | serge | 260 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
3031 | serge | 261 | |
6084 | serge | 262 | *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; |
3480 | Serge | 263 | |
6084 | serge | 264 | switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { |
265 | case GEN7_STOLEN_RESERVED_1M: |
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266 | *size = 1024 * 1024; |
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267 | break; |
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268 | case GEN7_STOLEN_RESERVED_256K: |
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269 | *size = 256 * 1024; |
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270 | break; |
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271 | default: |
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272 | *size = 1024 * 1024; |
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273 | MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); |
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274 | } |
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3480 | Serge | 275 | } |
276 | |||
6084 | serge | 277 | static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, |
278 | unsigned long *base, unsigned long *size) |
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3480 | Serge | 279 | { |
6084 | serge | 280 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
3480 | Serge | 281 | |
6084 | serge | 282 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
3480 | Serge | 283 | |
6084 | serge | 284 | switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { |
285 | case GEN8_STOLEN_RESERVED_1M: |
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286 | *size = 1024 * 1024; |
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287 | break; |
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288 | case GEN8_STOLEN_RESERVED_2M: |
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289 | *size = 2 * 1024 * 1024; |
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290 | break; |
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291 | case GEN8_STOLEN_RESERVED_4M: |
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292 | *size = 4 * 1024 * 1024; |
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293 | break; |
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294 | case GEN8_STOLEN_RESERVED_8M: |
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295 | *size = 8 * 1024 * 1024; |
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296 | break; |
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297 | default: |
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298 | *size = 8 * 1024 * 1024; |
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299 | MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); |
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4104 | Serge | 300 | } |
3031 | serge | 301 | } |
302 | |||
6084 | serge | 303 | static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, |
304 | unsigned long *base, unsigned long *size) |
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3031 | serge | 305 | { |
6084 | serge | 306 | uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
307 | unsigned long stolen_top; |
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3480 | Serge | 308 | |
6084 | serge | 309 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; |
4104 | Serge | 310 | |
6084 | serge | 311 | *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
312 | |||
313 | /* On these platforms, the register doesn't have a size field, so the |
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314 | * size is the distance between the base and the top of the stolen |
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315 | * memory. We also have the genuine case where base is zero and there's |
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316 | * nothing reserved. */ |
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317 | if (*base == 0) |
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318 | *size = 0; |
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319 | else |
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320 | *size = stolen_top - *base; |
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3031 | serge | 321 | } |
322 | |||
323 | int i915_gem_init_stolen(struct drm_device *dev) |
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324 | { |
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325 | struct drm_i915_private *dev_priv = dev->dev_private; |
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6084 | serge | 326 | unsigned long reserved_total, reserved_base = 0, reserved_size; |
327 | unsigned long stolen_top; |
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3031 | serge | 328 | |
6084 | serge | 329 | mutex_init(&dev_priv->mm.stolen_lock); |
330 | |||
5060 | serge | 331 | #ifdef CONFIG_INTEL_IOMMU |
332 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
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333 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
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334 | return 0; |
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335 | } |
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336 | #endif |
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337 | |||
4104 | Serge | 338 | if (dev_priv->gtt.stolen_size == 0) |
339 | return 0; |
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340 | |||
3480 | Serge | 341 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
342 | if (dev_priv->mm.stolen_base == 0) |
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343 | return 0; |
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344 | |||
6084 | serge | 345 | stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; |
3480 | Serge | 346 | |
6084 | serge | 347 | switch (INTEL_INFO(dev_priv)->gen) { |
348 | case 2: |
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349 | case 3: |
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350 | break; |
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351 | case 4: |
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352 | if (IS_G4X(dev)) |
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353 | g4x_get_stolen_reserved(dev_priv, &reserved_base, |
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354 | &reserved_size); |
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355 | break; |
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356 | case 5: |
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357 | /* Assume the gen6 maximum for the older platforms. */ |
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358 | reserved_size = 1024 * 1024; |
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359 | reserved_base = stolen_top - reserved_size; |
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360 | break; |
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361 | case 6: |
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362 | gen6_get_stolen_reserved(dev_priv, &reserved_base, |
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363 | &reserved_size); |
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364 | break; |
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365 | case 7: |
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366 | gen7_get_stolen_reserved(dev_priv, &reserved_base, |
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367 | &reserved_size); |
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368 | break; |
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369 | default: |
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370 | if (IS_BROADWELL(dev_priv) || IS_SKYLAKE(dev_priv)) |
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371 | bdw_get_stolen_reserved(dev_priv, &reserved_base, |
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372 | &reserved_size); |
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373 | else |
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374 | gen8_get_stolen_reserved(dev_priv, &reserved_base, |
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375 | &reserved_size); |
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376 | break; |
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5354 | serge | 377 | } |
4104 | Serge | 378 | |
6084 | serge | 379 | /* It is possible for the reserved base to be zero, but the register |
380 | * field for size doesn't have a zero option. */ |
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381 | if (reserved_base == 0) { |
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382 | reserved_size = 0; |
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383 | reserved_base = stolen_top; |
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384 | } |
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385 | |||
386 | if (reserved_base < dev_priv->mm.stolen_base || |
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387 | reserved_base + reserved_size > stolen_top) { |
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388 | DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", |
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389 | reserved_base, reserved_base + reserved_size, |
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390 | dev_priv->mm.stolen_base, stolen_top); |
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4104 | Serge | 391 | return 0; |
6084 | serge | 392 | } |
4104 | Serge | 393 | |
6084 | serge | 394 | /* It is possible for the reserved area to end before the end of stolen |
395 | * memory, so just consider the start. */ |
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396 | reserved_total = stolen_top - reserved_base; |
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3031 | serge | 397 | |
6084 | serge | 398 | DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
399 | dev_priv->gtt.stolen_size >> 10, |
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400 | (dev_priv->gtt.stolen_size - reserved_total) >> 10); |
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401 | |||
402 | dev_priv->gtt.stolen_usable_size = dev_priv->gtt.stolen_size - |
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403 | reserved_total; |
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404 | |||
405 | /* |
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406 | * Basic memrange allocator for stolen space. |
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407 | * |
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408 | * TODO: Notice that some platforms require us to not use the first page |
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409 | * of the stolen memory but their BIOSes may still put the framebuffer |
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410 | * on the first page. So we don't reserve this page for now because of |
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411 | * that. Our current solution is to just prevent new nodes from being |
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412 | * inserted on the first page - see the check we have at |
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413 | * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon |
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414 | * problem later. |
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415 | */ |
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416 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_usable_size); |
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417 | |||
3480 | Serge | 418 | return 0; |
419 | } |
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3031 | serge | 420 | |
3480 | Serge | 421 | static struct sg_table * |
422 | i915_pages_create_for_stolen(struct drm_device *dev, |
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423 | u32 offset, u32 size) |
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424 | { |
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425 | struct drm_i915_private *dev_priv = dev->dev_private; |
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426 | struct sg_table *st; |
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427 | struct scatterlist *sg; |
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3031 | serge | 428 | |
3480 | Serge | 429 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); |
430 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
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431 | |||
432 | /* We hide that we have no struct page backing our stolen object |
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433 | * by wrapping the contiguous physical allocation with a fake |
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434 | * dma mapping in a single scatterlist. |
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435 | */ |
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436 | |||
437 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
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438 | if (st == NULL) |
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439 | return NULL; |
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440 | |||
441 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { |
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442 | kfree(st); |
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443 | return NULL; |
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3031 | serge | 444 | } |
445 | |||
3480 | Serge | 446 | sg = st->sgl; |
4560 | Serge | 447 | sg->offset = 0; |
3480 | Serge | 448 | sg->length = size; |
449 | |||
450 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; |
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451 | sg_dma_len(sg) = size; |
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452 | |||
453 | return st; |
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3031 | serge | 454 | } |
3480 | Serge | 455 | |
456 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) |
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457 | { |
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458 | BUG(); |
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459 | return -EINVAL; |
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460 | } |
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461 | |||
462 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) |
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463 | { |
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464 | /* Should only be called during free */ |
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465 | sg_free_table(obj->pages); |
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466 | kfree(obj->pages); |
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467 | } |
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468 | |||
5060 | serge | 469 | |
470 | static void |
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471 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) |
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472 | { |
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6084 | serge | 473 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
474 | |||
5060 | serge | 475 | if (obj->stolen) { |
6084 | serge | 476 | i915_gem_stolen_remove_node(dev_priv, obj->stolen); |
5060 | serge | 477 | kfree(obj->stolen); |
478 | obj->stolen = NULL; |
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479 | } |
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480 | } |
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3480 | Serge | 481 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
482 | .get_pages = i915_gem_object_get_pages_stolen, |
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483 | .put_pages = i915_gem_object_put_pages_stolen, |
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5060 | serge | 484 | .release = i915_gem_object_release_stolen, |
3480 | Serge | 485 | }; |
486 | |||
487 | static struct drm_i915_gem_object * |
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488 | _i915_gem_object_create_stolen(struct drm_device *dev, |
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489 | struct drm_mm_node *stolen) |
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490 | { |
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491 | struct drm_i915_gem_object *obj; |
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492 | |||
493 | obj = i915_gem_object_alloc(dev); |
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494 | if (obj == NULL) |
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495 | return NULL; |
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496 | |||
4104 | Serge | 497 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
3480 | Serge | 498 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
499 | |||
500 | obj->pages = i915_pages_create_for_stolen(dev, |
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501 | stolen->start, stolen->size); |
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502 | if (obj->pages == NULL) |
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503 | goto cleanup; |
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504 | |||
4104 | Serge | 505 | i915_gem_object_pin_pages(obj); |
3480 | Serge | 506 | obj->stolen = stolen; |
507 | |||
4104 | Serge | 508 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
509 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; |
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3480 | Serge | 510 | |
511 | return obj; |
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512 | |||
513 | cleanup: |
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514 | i915_gem_object_free(obj); |
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515 | return NULL; |
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516 | } |
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517 | |||
518 | struct drm_i915_gem_object * |
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519 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) |
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520 | { |
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521 | struct drm_i915_private *dev_priv = dev->dev_private; |
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522 | struct drm_i915_gem_object *obj; |
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523 | struct drm_mm_node *stolen; |
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4104 | Serge | 524 | int ret; |
3480 | Serge | 525 | |
4104 | Serge | 526 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
3480 | Serge | 527 | return NULL; |
528 | |||
529 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); |
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530 | if (size == 0) |
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531 | return NULL; |
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532 | |||
4104 | Serge | 533 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
534 | if (!stolen) |
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3480 | Serge | 535 | return NULL; |
536 | |||
6084 | serge | 537 | ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
4104 | Serge | 538 | if (ret) { |
539 | kfree(stolen); |
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540 | return NULL; |
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541 | } |
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542 | |||
3480 | Serge | 543 | obj = _i915_gem_object_create_stolen(dev, stolen); |
544 | if (obj) |
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545 | return obj; |
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546 | |||
6084 | serge | 547 | i915_gem_stolen_remove_node(dev_priv, stolen); |
4104 | Serge | 548 | kfree(stolen); |
3480 | Serge | 549 | return NULL; |
550 | } |
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551 | |||
3764 | Serge | 552 | struct drm_i915_gem_object * |
553 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, |
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554 | u32 stolen_offset, |
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555 | u32 gtt_offset, |
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556 | u32 size) |
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557 | { |
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558 | struct drm_i915_private *dev_priv = dev->dev_private; |
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4104 | Serge | 559 | struct i915_address_space *ggtt = &dev_priv->gtt.base; |
3764 | Serge | 560 | struct drm_i915_gem_object *obj; |
561 | struct drm_mm_node *stolen; |
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4104 | Serge | 562 | struct i915_vma *vma; |
563 | int ret; |
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3764 | Serge | 564 | |
4104 | Serge | 565 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
3764 | Serge | 566 | return NULL; |
567 | |||
568 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", |
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569 | stolen_offset, gtt_offset, size); |
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570 | |||
571 | /* KISS and expect everything to be page-aligned */ |
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6084 | serge | 572 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
573 | WARN_ON(stolen_offset & 4095)) |
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3764 | Serge | 574 | return NULL; |
575 | |||
4104 | Serge | 576 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
577 | if (!stolen) |
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578 | return NULL; |
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579 | |||
580 | stolen->start = stolen_offset; |
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581 | stolen->size = size; |
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6084 | serge | 582 | mutex_lock(&dev_priv->mm.stolen_lock); |
4104 | Serge | 583 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
6084 | serge | 584 | mutex_unlock(&dev_priv->mm.stolen_lock); |
4104 | Serge | 585 | if (ret) { |
3764 | Serge | 586 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
4104 | Serge | 587 | kfree(stolen); |
3764 | Serge | 588 | return NULL; |
589 | } |
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590 | |||
591 | obj = _i915_gem_object_create_stolen(dev, stolen); |
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592 | if (obj == NULL) { |
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593 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); |
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6084 | serge | 594 | i915_gem_stolen_remove_node(dev_priv, stolen); |
4104 | Serge | 595 | kfree(stolen); |
3764 | Serge | 596 | return NULL; |
597 | } |
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598 | |||
4104 | Serge | 599 | /* Some objects just need physical mem from stolen space */ |
600 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
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601 | return obj; |
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602 | |||
4560 | Serge | 603 | vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
4104 | Serge | 604 | if (IS_ERR(vma)) { |
605 | ret = PTR_ERR(vma); |
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6084 | serge | 606 | goto err; |
4104 | Serge | 607 | } |
608 | |||
3764 | Serge | 609 | /* To simplify the initialisation sequence between KMS and GTT, |
610 | * we allow construction of the stolen object prior to |
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611 | * setting up the GTT space. The actual reservation will occur |
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612 | * later. |
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613 | */ |
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4104 | Serge | 614 | vma->node.start = gtt_offset; |
615 | vma->node.size = size; |
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616 | if (drm_mm_initialized(&ggtt->mm)) { |
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617 | ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); |
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618 | if (ret) { |
||
3764 | Serge | 619 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
6084 | serge | 620 | goto err; |
3764 | Serge | 621 | } |
622 | |||
6084 | serge | 623 | vma->bound |= GLOBAL_BIND; |
624 | __i915_vma_set_map_and_fenceable(vma); |
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625 | list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
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626 | } |
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3764 | Serge | 627 | |
4104 | Serge | 628 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
4560 | Serge | 629 | i915_gem_object_pin_pages(obj); |
3764 | Serge | 630 | |
631 | return obj; |
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4104 | Serge | 632 | |
6084 | serge | 633 | err: |
4104 | Serge | 634 | drm_gem_object_unreference(&obj->base); |
635 | return NULL; |
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3764 | Serge | 636 | }>>>><>=>>><>=>><>20)><20)>> |