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Rev | Author | Line No. | Line |
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4075 | Serge | 1 | /************************************************************************** |
2 | * |
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3 | * Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., USA |
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4 | * All Rights Reserved. |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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7 | * copy of this software and associated documentation files (the |
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8 | * "Software"), to deal in the Software without restriction, including |
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9 | * without limitation the rights to use, copy, modify, merge, publish, |
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10 | * distribute, sub license, and/or sell copies of the Software, and to |
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11 | * permit persons to whom the Software is furnished to do so, subject to |
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12 | * the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice (including the |
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15 | * next paragraph) shall be included in all copies or substantial portions |
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16 | * of the Software. |
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17 | * |
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18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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25 | * |
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26 | **************************************************************************/ |
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27 | /* |
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28 | * Authors: Thomas Hellstrom |
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29 | */ |
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30 | |||
31 | #include "vmwgfx_drv.h" |
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32 | #include |
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33 | #include |
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34 | #include |
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35 | #include |
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36 | #include |
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37 | #include |
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38 | |||
39 | struct vmwgfx_gmrid_man { |
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40 | spinlock_t lock; |
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41 | struct ida gmr_ida; |
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42 | uint32_t max_gmr_ids; |
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43 | uint32_t max_gmr_pages; |
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44 | uint32_t used_gmr_pages; |
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45 | }; |
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46 | |||
47 | static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man, |
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48 | struct ttm_buffer_object *bo, |
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6296 | serge | 49 | const struct ttm_place *place, |
4075 | Serge | 50 | struct ttm_mem_reg *mem) |
51 | { |
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52 | struct vmwgfx_gmrid_man *gman = |
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53 | (struct vmwgfx_gmrid_man *)man->priv; |
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54 | int ret = 0; |
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55 | int id; |
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56 | |||
57 | mem->mm_node = NULL; |
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58 | |||
59 | spin_lock(&gman->lock); |
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60 | |||
61 | if (gman->max_gmr_pages > 0) { |
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62 | gman->used_gmr_pages += bo->num_pages; |
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63 | if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages)) |
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64 | goto out_err_locked; |
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65 | } |
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66 | |||
67 | do { |
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68 | spin_unlock(&gman->lock); |
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69 | if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0)) { |
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70 | ret = -ENOMEM; |
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71 | goto out_err; |
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72 | } |
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73 | spin_lock(&gman->lock); |
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74 | |||
75 | ret = ida_get_new(&gman->gmr_ida, &id); |
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76 | if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) { |
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77 | ida_remove(&gman->gmr_ida, id); |
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78 | ret = 0; |
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79 | goto out_err_locked; |
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80 | } |
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81 | } while (ret == -EAGAIN); |
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82 | |||
83 | if (likely(ret == 0)) { |
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84 | mem->mm_node = gman; |
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85 | mem->start = id; |
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86 | mem->num_pages = bo->num_pages; |
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87 | } else |
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88 | goto out_err_locked; |
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89 | |||
90 | spin_unlock(&gman->lock); |
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91 | return 0; |
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92 | |||
93 | out_err: |
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94 | spin_lock(&gman->lock); |
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95 | out_err_locked: |
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96 | gman->used_gmr_pages -= bo->num_pages; |
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97 | spin_unlock(&gman->lock); |
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98 | return ret; |
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99 | } |
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100 | |||
101 | static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man, |
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102 | struct ttm_mem_reg *mem) |
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103 | { |
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104 | struct vmwgfx_gmrid_man *gman = |
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105 | (struct vmwgfx_gmrid_man *)man->priv; |
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106 | |||
107 | if (mem->mm_node) { |
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108 | spin_lock(&gman->lock); |
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109 | ida_remove(&gman->gmr_ida, mem->start); |
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110 | gman->used_gmr_pages -= mem->num_pages; |
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111 | spin_unlock(&gman->lock); |
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112 | mem->mm_node = NULL; |
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113 | } |
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114 | } |
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115 | |||
116 | static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man, |
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117 | unsigned long p_size) |
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118 | { |
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119 | struct vmw_private *dev_priv = |
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120 | container_of(man->bdev, struct vmw_private, bdev); |
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121 | struct vmwgfx_gmrid_man *gman = |
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122 | kzalloc(sizeof(*gman), GFP_KERNEL); |
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123 | |||
124 | if (unlikely(gman == NULL)) |
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125 | return -ENOMEM; |
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126 | |||
127 | spin_lock_init(&gman->lock); |
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128 | gman->used_gmr_pages = 0; |
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129 | ida_init(&gman->gmr_ida); |
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4569 | Serge | 130 | |
131 | switch (p_size) { |
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132 | case VMW_PL_GMR: |
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133 | gman->max_gmr_ids = dev_priv->max_gmr_ids; |
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134 | gman->max_gmr_pages = dev_priv->max_gmr_pages; |
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135 | break; |
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136 | case VMW_PL_MOB: |
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137 | gman->max_gmr_ids = VMWGFX_NUM_MOB; |
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138 | gman->max_gmr_pages = dev_priv->max_mob_pages; |
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139 | break; |
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140 | default: |
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141 | BUG(); |
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142 | } |
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4075 | Serge | 143 | man->priv = (void *) gman; |
144 | return 0; |
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145 | } |
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146 | |||
147 | static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man) |
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148 | { |
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149 | struct vmwgfx_gmrid_man *gman = |
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150 | (struct vmwgfx_gmrid_man *)man->priv; |
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151 | |||
152 | if (gman) { |
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153 | ida_destroy(&gman->gmr_ida); |
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154 | kfree(gman); |
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155 | } |
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156 | return 0; |
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157 | } |
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158 | |||
159 | static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man, |
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160 | const char *prefix) |
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161 | { |
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162 | printk(KERN_INFO "%s: No debug info available for the GMR " |
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163 | "id manager.\n", prefix); |
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164 | } |
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165 | |||
166 | const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = { |
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167 | vmw_gmrid_man_init, |
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168 | vmw_gmrid_man_takedown, |
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169 | vmw_gmrid_man_get_node, |
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170 | vmw_gmrid_man_put_node, |
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171 | vmw_gmrid_man_debug |
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172 | }; |