2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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:
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
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
37 #define I915_GTT_PAGE_SHIFT 12
38 #define I915_GTT_PAGE_MASK (~(I915_GTT_PAGE_SIZE - 1))
42 #define INTEL_GVT_INVALID_ADDR (~0UL)
44 struct intel_gvt_gtt_entry {
49 struct intel_gvt_gtt_pte_ops {
50 int (*get_entry)(void *pt,
51 struct intel_gvt_gtt_entry *e,
53 bool hypervisor_access,
55 struct intel_vgpu *vgpu);
56 int (*set_entry)(void *pt,
57 struct intel_gvt_gtt_entry *e,
59 bool hypervisor_access,
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);
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);
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;
94 struct page *scratch_page;
95 unsigned long scratch_mfn;
99 GTT_TYPE_INVALID = -1,
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,
108 GTT_TYPE_PPGTT_PTE_ENTRY,
110 GTT_TYPE_PPGTT_PDE_ENTRY,
111 GTT_TYPE_PPGTT_PDP_ENTRY,
112 GTT_TYPE_PPGTT_PML4_ENTRY,
114 GTT_TYPE_PPGTT_ROOT_ENTRY,
116 GTT_TYPE_PPGTT_ROOT_L3_ENTRY,
117 GTT_TYPE_PPGTT_ROOT_L4_ENTRY,
119 GTT_TYPE_PPGTT_ENTRY,
121 GTT_TYPE_PPGTT_PTE_PT,
122 GTT_TYPE_PPGTT_PDE_PT,
123 GTT_TYPE_PPGTT_PDP_PT,
124 GTT_TYPE_PPGTT_PML4_PT,
127 } intel_gvt_gtt_type_t;
129 enum intel_gvt_mm_type {
134 #define GVT_RING_CTX_NR_PDPS GEN8_3LVL_PDPES
136 struct intel_vgpu_mm {
137 enum intel_gvt_mm_type type;
138 struct intel_vgpu *vgpu;
145 intel_gvt_gtt_type_t root_entry_type;
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.
151 u64 guest_pdps[GVT_RING_CTX_NR_PDPS];
152 u64 shadow_pdps[GVT_RING_CTX_NR_PDPS];
155 struct list_head list;
156 struct list_head lru_list;
164 struct intel_vgpu_mm *intel_vgpu_create_ppgtt_mm(struct intel_vgpu *vgpu,
165 intel_gvt_gtt_type_t root_entry_type, u64 pdps[]);
167 static inline void intel_vgpu_mm_get(struct intel_vgpu_mm *mm)
172 void _intel_vgpu_mm_release(struct kref *mm_ref);
174 static inline void intel_vgpu_mm_put(struct intel_vgpu_mm *mm)
176 kref_put(&mm->ref, _intel_vgpu_mm_release);
179 static inline void intel_vgpu_destroy_mm(struct intel_vgpu_mm *mm)
181 intel_vgpu_mm_put(mm);
184 struct intel_vgpu_guest_page;
186 struct intel_vgpu_scratch_pt {
188 unsigned long page_mfn;
191 struct intel_vgpu_gtt {
192 struct intel_vgpu_mm *ggtt_mm;
193 unsigned long active_ppgtt_mm_bitmap;
194 struct list_head ppgtt_mm_list_head;
195 struct radix_tree_root spt_tree;
196 struct list_head oos_page_list_head;
197 struct list_head post_shadow_list_head;
198 struct intel_vgpu_scratch_pt scratch_pt[GTT_TYPE_MAX];
201 extern int intel_vgpu_init_gtt(struct intel_vgpu *vgpu);
202 extern void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu);
203 void intel_vgpu_reset_ggtt(struct intel_vgpu *vgpu, bool invalidate_old);
204 void intel_vgpu_invalidate_ppgtt(struct intel_vgpu *vgpu);
206 extern int intel_gvt_init_gtt(struct intel_gvt *gvt);
207 void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu);
208 extern void intel_gvt_clean_gtt(struct intel_gvt *gvt);
210 extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu,
211 int page_table_level, void *root_entry);
213 struct intel_vgpu_oos_page {
214 struct intel_vgpu_ppgtt_spt *spt;
215 struct list_head list;
216 struct list_head vm_list;
218 unsigned char mem[I915_GTT_PAGE_SIZE];
221 #define GTT_ENTRY_NUM_IN_ONE_PAGE 512
223 /* Represent a vgpu shadow page table. */
224 struct intel_vgpu_ppgtt_spt {
226 struct intel_vgpu *vgpu;
229 intel_gvt_gtt_type_t type;
230 bool pde_ips; /* for 64KB PTEs */
237 intel_gvt_gtt_type_t type;
238 bool pde_ips; /* for 64KB PTEs */
240 unsigned long write_cnt;
241 struct intel_vgpu_oos_page *oos_page;
244 DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE);
245 struct list_head post_shadow_list;
248 int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu);
250 int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu);
252 int intel_vgpu_pin_mm(struct intel_vgpu_mm *mm);
254 void intel_vgpu_unpin_mm(struct intel_vgpu_mm *mm);
256 unsigned long intel_vgpu_gma_to_gpa(struct intel_vgpu_mm *mm,
259 struct intel_vgpu_mm *intel_vgpu_find_ppgtt_mm(struct intel_vgpu *vgpu,
262 struct intel_vgpu_mm *intel_vgpu_get_ppgtt_mm(struct intel_vgpu *vgpu,
263 intel_gvt_gtt_type_t root_entry_type, u64 pdps[]);
265 int intel_vgpu_put_ppgtt_mm(struct intel_vgpu *vgpu, u64 pdps[]);
267 int intel_vgpu_emulate_ggtt_mmio_read(struct intel_vgpu *vgpu,
268 unsigned int off, void *p_data, unsigned int bytes);
270 int intel_vgpu_emulate_ggtt_mmio_write(struct intel_vgpu *vgpu,
271 unsigned int off, void *p_data, unsigned int bytes);
273 #endif /* _GVT_GTT_H_ */