1 /* 2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 * 23 * Authors: 24 * Zhi Wang <zhi.a.wang@intel.com> 25 * Zhenyu Wang <zhenyuw@linux.intel.com> 26 * Xiao Zheng <xiao.zheng@intel.com> 27 * 28 * Contributors: 29 * Min He <min.he@intel.com> 30 * Bing Niu <bing.niu@intel.com> 31 * 32 */ 33 34 #ifndef _GVT_GTT_H_ 35 #define _GVT_GTT_H_ 36 37 #define I915_GTT_PAGE_SHIFT 12 38 39 struct intel_vgpu_mm; 40 41 #define INTEL_GVT_INVALID_ADDR (~0UL) 42 43 struct intel_gvt_gtt_entry { 44 u64 val64; 45 int type; 46 }; 47 48 struct intel_gvt_gtt_pte_ops { 49 int (*get_entry)(void *pt, 50 struct intel_gvt_gtt_entry *e, 51 unsigned long index, 52 bool hypervisor_access, 53 unsigned long gpa, 54 struct intel_vgpu *vgpu); 55 int (*set_entry)(void *pt, 56 struct intel_gvt_gtt_entry *e, 57 unsigned long index, 58 bool hypervisor_access, 59 unsigned long gpa, 60 struct intel_vgpu *vgpu); 61 bool (*test_present)(struct intel_gvt_gtt_entry *e); 62 void (*clear_present)(struct intel_gvt_gtt_entry *e); 63 void (*set_present)(struct intel_gvt_gtt_entry *e); 64 bool (*test_pse)(struct intel_gvt_gtt_entry *e); 65 void (*clear_pse)(struct intel_gvt_gtt_entry *e); 66 bool (*test_ips)(struct intel_gvt_gtt_entry *e); 67 void (*clear_ips)(struct intel_gvt_gtt_entry *e); 68 bool (*test_64k_splited)(struct intel_gvt_gtt_entry *e); 69 void (*clear_64k_splited)(struct intel_gvt_gtt_entry *e); 70 void (*set_64k_splited)(struct intel_gvt_gtt_entry *e); 71 void (*set_pfn)(struct intel_gvt_gtt_entry *e, unsigned long pfn); 72 unsigned long (*get_pfn)(struct intel_gvt_gtt_entry *e); 73 }; 74 75 struct intel_gvt_gtt_gma_ops { 76 unsigned long (*gma_to_ggtt_pte_index)(unsigned long gma); 77 unsigned long (*gma_to_pte_index)(unsigned long gma); 78 unsigned long (*gma_to_pde_index)(unsigned long gma); 79 unsigned long (*gma_to_l3_pdp_index)(unsigned long gma); 80 unsigned long (*gma_to_l4_pdp_index)(unsigned long gma); 81 unsigned long (*gma_to_pml4_index)(unsigned long gma); 82 }; 83 84 struct intel_gvt_gtt { 85 struct intel_gvt_gtt_pte_ops *pte_ops; 86 struct intel_gvt_gtt_gma_ops *gma_ops; 87 int (*mm_alloc_page_table)(struct intel_vgpu_mm *mm); 88 void (*mm_free_page_table)(struct intel_vgpu_mm *mm); 89 struct list_head oos_page_use_list_head; 90 struct list_head oos_page_free_list_head; 91 struct mutex ppgtt_mm_lock; 92 struct list_head ppgtt_mm_lru_list_head; 93 94 struct page *scratch_page; 95 unsigned long scratch_mfn; 96 }; 97 98 typedef enum { 99 GTT_TYPE_INVALID = -1, 100 101 GTT_TYPE_GGTT_PTE, 102 103 GTT_TYPE_PPGTT_PTE_4K_ENTRY, 104 GTT_TYPE_PPGTT_PTE_64K_ENTRY, 105 GTT_TYPE_PPGTT_PTE_2M_ENTRY, 106 GTT_TYPE_PPGTT_PTE_1G_ENTRY, 107 108 GTT_TYPE_PPGTT_PTE_ENTRY, 109 110 GTT_TYPE_PPGTT_PDE_ENTRY, 111 GTT_TYPE_PPGTT_PDP_ENTRY, 112 GTT_TYPE_PPGTT_PML4_ENTRY, 113 114 GTT_TYPE_PPGTT_ROOT_ENTRY, 115 116 GTT_TYPE_PPGTT_ROOT_L3_ENTRY, 117 GTT_TYPE_PPGTT_ROOT_L4_ENTRY, 118 119 GTT_TYPE_PPGTT_ENTRY, 120 121 GTT_TYPE_PPGTT_PTE_PT, 122 GTT_TYPE_PPGTT_PDE_PT, 123 GTT_TYPE_PPGTT_PDP_PT, 124 GTT_TYPE_PPGTT_PML4_PT, 125 126 GTT_TYPE_MAX, 127 } intel_gvt_gtt_type_t; 128 129 enum intel_gvt_mm_type { 130 INTEL_GVT_MM_GGTT, 131 INTEL_GVT_MM_PPGTT, 132 }; 133 134 #define GVT_RING_CTX_NR_PDPS GEN8_3LVL_PDPES 135 136 struct intel_gvt_partial_pte { 137 unsigned long offset; 138 u64 data; 139 struct list_head list; 140 }; 141 142 struct intel_vgpu_mm { 143 enum intel_gvt_mm_type type; 144 struct intel_vgpu *vgpu; 145 146 struct kref ref; 147 atomic_t pincount; 148 149 union { 150 struct { 151 intel_gvt_gtt_type_t root_entry_type; 152 /* 153 * The 4 PDPs in ring context. For 48bit addressing, 154 * only PDP0 is valid and point to PML4. For 32it 155 * addressing, all 4 are used as true PDPs. 156 */ 157 u64 guest_pdps[GVT_RING_CTX_NR_PDPS]; 158 u64 shadow_pdps[GVT_RING_CTX_NR_PDPS]; 159 bool shadowed; 160 161 struct list_head list; 162 struct list_head lru_list; 163 } ppgtt_mm; 164 struct { 165 void *virtual_ggtt; 166 struct list_head partial_pte_list; 167 } ggtt_mm; 168 }; 169 }; 170 171 struct intel_vgpu_mm *intel_vgpu_create_ppgtt_mm(struct intel_vgpu *vgpu, 172 intel_gvt_gtt_type_t root_entry_type, u64 pdps[]); 173 174 static inline void intel_vgpu_mm_get(struct intel_vgpu_mm *mm) 175 { 176 kref_get(&mm->ref); 177 } 178 179 void _intel_vgpu_mm_release(struct kref *mm_ref); 180 181 static inline void intel_vgpu_mm_put(struct intel_vgpu_mm *mm) 182 { 183 kref_put(&mm->ref, _intel_vgpu_mm_release); 184 } 185 186 static inline void intel_vgpu_destroy_mm(struct intel_vgpu_mm *mm) 187 { 188 intel_vgpu_mm_put(mm); 189 } 190 191 struct intel_vgpu_guest_page; 192 193 struct intel_vgpu_scratch_pt { 194 struct page *page; 195 unsigned long page_mfn; 196 }; 197 198 struct intel_vgpu_gtt { 199 struct intel_vgpu_mm *ggtt_mm; 200 unsigned long active_ppgtt_mm_bitmap; 201 struct list_head ppgtt_mm_list_head; 202 struct radix_tree_root spt_tree; 203 struct list_head oos_page_list_head; 204 struct list_head post_shadow_list_head; 205 struct intel_vgpu_scratch_pt scratch_pt[GTT_TYPE_MAX]; 206 }; 207 208 extern int intel_vgpu_init_gtt(struct intel_vgpu *vgpu); 209 extern void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu); 210 void intel_vgpu_reset_ggtt(struct intel_vgpu *vgpu, bool invalidate_old); 211 void intel_vgpu_invalidate_ppgtt(struct intel_vgpu *vgpu); 212 213 extern int intel_gvt_init_gtt(struct intel_gvt *gvt); 214 void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu); 215 extern void intel_gvt_clean_gtt(struct intel_gvt *gvt); 216 217 extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu, 218 int page_table_level, void *root_entry); 219 220 struct intel_vgpu_oos_page { 221 struct intel_vgpu_ppgtt_spt *spt; 222 struct list_head list; 223 struct list_head vm_list; 224 int id; 225 unsigned char mem[I915_GTT_PAGE_SIZE]; 226 }; 227 228 #define GTT_ENTRY_NUM_IN_ONE_PAGE 512 229 230 /* Represent a vgpu shadow page table. */ 231 struct intel_vgpu_ppgtt_spt { 232 atomic_t refcount; 233 struct intel_vgpu *vgpu; 234 235 struct { 236 intel_gvt_gtt_type_t type; 237 bool pde_ips; /* for 64KB PTEs */ 238 void *vaddr; 239 struct page *page; 240 unsigned long mfn; 241 } shadow_page; 242 243 struct { 244 intel_gvt_gtt_type_t type; 245 bool pde_ips; /* for 64KB PTEs */ 246 unsigned long gfn; 247 unsigned long write_cnt; 248 struct intel_vgpu_oos_page *oos_page; 249 } guest_page; 250 251 DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE); 252 struct list_head post_shadow_list; 253 }; 254 255 int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu); 256 257 int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu); 258 259 int intel_vgpu_pin_mm(struct intel_vgpu_mm *mm); 260 261 void intel_vgpu_unpin_mm(struct intel_vgpu_mm *mm); 262 263 unsigned long intel_vgpu_gma_to_gpa(struct intel_vgpu_mm *mm, 264 unsigned long gma); 265 266 struct intel_vgpu_mm *intel_vgpu_find_ppgtt_mm(struct intel_vgpu *vgpu, 267 u64 pdps[]); 268 269 struct intel_vgpu_mm *intel_vgpu_get_ppgtt_mm(struct intel_vgpu *vgpu, 270 intel_gvt_gtt_type_t root_entry_type, u64 pdps[]); 271 272 int intel_vgpu_put_ppgtt_mm(struct intel_vgpu *vgpu, u64 pdps[]); 273 274 int intel_vgpu_emulate_ggtt_mmio_read(struct intel_vgpu *vgpu, 275 unsigned int off, void *p_data, unsigned int bytes); 276 277 int intel_vgpu_emulate_ggtt_mmio_write(struct intel_vgpu *vgpu, 278 unsigned int off, void *p_data, unsigned int bytes); 279 280 #endif /* _GVT_GTT_H_ */ 281