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 #define I915_GTT_PAGE_MASK (~(I915_GTT_PAGE_SIZE - 1)) 39 40 struct intel_vgpu_mm; 41 42 #define INTEL_GVT_INVALID_ADDR (~0UL) 43 44 struct intel_gvt_gtt_entry { 45 u64 val64; 46 int type; 47 }; 48 49 struct intel_gvt_gtt_pte_ops { 50 int (*get_entry)(void *pt, 51 struct intel_gvt_gtt_entry *e, 52 unsigned long index, 53 bool hypervisor_access, 54 unsigned long gpa, 55 struct intel_vgpu *vgpu); 56 int (*set_entry)(void *pt, 57 struct intel_gvt_gtt_entry *e, 58 unsigned long index, 59 bool hypervisor_access, 60 unsigned long gpa, 61 struct intel_vgpu *vgpu); 62 bool (*test_present)(struct intel_gvt_gtt_entry *e); 63 void (*clear_present)(struct intel_gvt_gtt_entry *e); 64 void (*set_present)(struct intel_gvt_gtt_entry *e); 65 bool (*test_pse)(struct intel_gvt_gtt_entry *e); 66 void (*clear_pse)(struct intel_gvt_gtt_entry *e); 67 bool (*test_ips)(struct intel_gvt_gtt_entry *e); 68 void (*clear_ips)(struct intel_gvt_gtt_entry *e); 69 bool (*test_64k_splited)(struct intel_gvt_gtt_entry *e); 70 void (*clear_64k_splited)(struct intel_gvt_gtt_entry *e); 71 void (*set_64k_splited)(struct intel_gvt_gtt_entry *e); 72 void (*set_pfn)(struct intel_gvt_gtt_entry *e, unsigned long pfn); 73 unsigned long (*get_pfn)(struct intel_gvt_gtt_entry *e); 74 }; 75 76 struct intel_gvt_gtt_gma_ops { 77 unsigned long (*gma_to_ggtt_pte_index)(unsigned long gma); 78 unsigned long (*gma_to_pte_index)(unsigned long gma); 79 unsigned long (*gma_to_pde_index)(unsigned long gma); 80 unsigned long (*gma_to_l3_pdp_index)(unsigned long gma); 81 unsigned long (*gma_to_l4_pdp_index)(unsigned long gma); 82 unsigned long (*gma_to_pml4_index)(unsigned long gma); 83 }; 84 85 struct intel_gvt_gtt { 86 struct intel_gvt_gtt_pte_ops *pte_ops; 87 struct intel_gvt_gtt_gma_ops *gma_ops; 88 int (*mm_alloc_page_table)(struct intel_vgpu_mm *mm); 89 void (*mm_free_page_table)(struct intel_vgpu_mm *mm); 90 struct list_head oos_page_use_list_head; 91 struct list_head oos_page_free_list_head; 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_vgpu_mm { 137 enum intel_gvt_mm_type type; 138 struct intel_vgpu *vgpu; 139 140 struct kref ref; 141 atomic_t pincount; 142 143 union { 144 struct { 145 intel_gvt_gtt_type_t root_entry_type; 146 /* 147 * The 4 PDPs in ring context. For 48bit addressing, 148 * only PDP0 is valid and point to PML4. For 32it 149 * addressing, all 4 are used as true PDPs. 150 */ 151 u64 guest_pdps[GVT_RING_CTX_NR_PDPS]; 152 u64 shadow_pdps[GVT_RING_CTX_NR_PDPS]; 153 bool shadowed; 154 155 struct list_head list; 156 struct list_head lru_list; 157 } ppgtt_mm; 158 struct { 159 void *virtual_ggtt; 160 unsigned long last_partial_off; 161 u64 last_partial_data; 162 } ggtt_mm; 163 }; 164 }; 165 166 struct intel_vgpu_mm *intel_vgpu_create_ppgtt_mm(struct intel_vgpu *vgpu, 167 intel_gvt_gtt_type_t root_entry_type, u64 pdps[]); 168 169 static inline void intel_vgpu_mm_get(struct intel_vgpu_mm *mm) 170 { 171 kref_get(&mm->ref); 172 } 173 174 void _intel_vgpu_mm_release(struct kref *mm_ref); 175 176 static inline void intel_vgpu_mm_put(struct intel_vgpu_mm *mm) 177 { 178 kref_put(&mm->ref, _intel_vgpu_mm_release); 179 } 180 181 static inline void intel_vgpu_destroy_mm(struct intel_vgpu_mm *mm) 182 { 183 intel_vgpu_mm_put(mm); 184 } 185 186 struct intel_vgpu_guest_page; 187 188 struct intel_vgpu_scratch_pt { 189 struct page *page; 190 unsigned long page_mfn; 191 }; 192 193 struct intel_vgpu_gtt { 194 struct intel_vgpu_mm *ggtt_mm; 195 unsigned long active_ppgtt_mm_bitmap; 196 struct list_head ppgtt_mm_list_head; 197 struct radix_tree_root spt_tree; 198 struct list_head oos_page_list_head; 199 struct list_head post_shadow_list_head; 200 struct intel_vgpu_scratch_pt scratch_pt[GTT_TYPE_MAX]; 201 }; 202 203 extern int intel_vgpu_init_gtt(struct intel_vgpu *vgpu); 204 extern void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu); 205 void intel_vgpu_reset_ggtt(struct intel_vgpu *vgpu, bool invalidate_old); 206 void intel_vgpu_invalidate_ppgtt(struct intel_vgpu *vgpu); 207 208 extern int intel_gvt_init_gtt(struct intel_gvt *gvt); 209 void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu); 210 extern void intel_gvt_clean_gtt(struct intel_gvt *gvt); 211 212 extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu, 213 int page_table_level, void *root_entry); 214 215 struct intel_vgpu_oos_page { 216 struct intel_vgpu_ppgtt_spt *spt; 217 struct list_head list; 218 struct list_head vm_list; 219 int id; 220 unsigned char mem[I915_GTT_PAGE_SIZE]; 221 }; 222 223 #define GTT_ENTRY_NUM_IN_ONE_PAGE 512 224 225 /* Represent a vgpu shadow page table. */ 226 struct intel_vgpu_ppgtt_spt { 227 atomic_t refcount; 228 struct intel_vgpu *vgpu; 229 230 struct { 231 intel_gvt_gtt_type_t type; 232 bool pde_ips; /* for 64KB PTEs */ 233 void *vaddr; 234 struct page *page; 235 unsigned long mfn; 236 } shadow_page; 237 238 struct { 239 intel_gvt_gtt_type_t type; 240 bool pde_ips; /* for 64KB PTEs */ 241 unsigned long gfn; 242 unsigned long write_cnt; 243 struct intel_vgpu_oos_page *oos_page; 244 } guest_page; 245 246 DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE); 247 struct list_head post_shadow_list; 248 }; 249 250 int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu); 251 252 int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu); 253 254 int intel_vgpu_pin_mm(struct intel_vgpu_mm *mm); 255 256 void intel_vgpu_unpin_mm(struct intel_vgpu_mm *mm); 257 258 unsigned long intel_vgpu_gma_to_gpa(struct intel_vgpu_mm *mm, 259 unsigned long gma); 260 261 struct intel_vgpu_mm *intel_vgpu_find_ppgtt_mm(struct intel_vgpu *vgpu, 262 u64 pdps[]); 263 264 struct intel_vgpu_mm *intel_vgpu_get_ppgtt_mm(struct intel_vgpu *vgpu, 265 intel_gvt_gtt_type_t root_entry_type, u64 pdps[]); 266 267 int intel_vgpu_put_ppgtt_mm(struct intel_vgpu *vgpu, u64 pdps[]); 268 269 int intel_vgpu_emulate_ggtt_mmio_read(struct intel_vgpu *vgpu, 270 unsigned int off, void *p_data, unsigned int bytes); 271 272 int intel_vgpu_emulate_ggtt_mmio_write(struct intel_vgpu *vgpu, 273 unsigned int off, void *p_data, unsigned int bytes); 274 275 #endif /* _GVT_GTT_H_ */ 276