1 files changed, 306 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/gtt.h b/drivers/gpu/drm/i915/gvt/gtt.h
new file mode 100644
index 000000000000..d250013bc37b
--- /dev/null
+++ b/drivers/gpu/drm/i915/gvt/gtt.h
@@ -0,0 +1,306 @@
+/*
+ * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Zhi Wang <zhi.a.wang@intel.com>
+ *    Zhenyu Wang <zhenyuw@linux.intel.com>
+ *    Xiao Zheng <xiao.zheng@intel.com>
+ *
+ * Contributors:
+ *    Min He <min.he@intel.com>
+ *    Bing Niu <bing.niu@intel.com>
+ *
+ */
+
+#ifndef _GVT_GTT_H_
+#define _GVT_GTT_H_
+
+#define GTT_PAGE_SHIFT		12
+#define GTT_PAGE_SIZE		(1UL << GTT_PAGE_SHIFT)
+#define GTT_PAGE_MASK		(~(GTT_PAGE_SIZE-1))
+
+struct intel_vgpu_mm;
+
+#define INTEL_GVT_GTT_HASH_BITS 8
+#define INTEL_GVT_INVALID_ADDR (~0UL)
+
+struct intel_gvt_gtt_entry {
+	u64 val64;
+	int type;
+};
+
+struct intel_gvt_gtt_pte_ops {
+	struct intel_gvt_gtt_entry *(*get_entry)(void *pt,
+		struct intel_gvt_gtt_entry *e,
+		unsigned long index, bool hypervisor_access, unsigned long gpa,
+		struct intel_vgpu *vgpu);
+	struct intel_gvt_gtt_entry *(*set_entry)(void *pt,
+		struct intel_gvt_gtt_entry *e,
+		unsigned long index, bool hypervisor_access, unsigned long gpa,
+		struct intel_vgpu *vgpu);
+	bool (*test_present)(struct intel_gvt_gtt_entry *e);
+	void (*clear_present)(struct intel_gvt_gtt_entry *e);
+	bool (*test_pse)(struct intel_gvt_gtt_entry *e);
+	void (*set_pfn)(struct intel_gvt_gtt_entry *e, unsigned long pfn);
+	unsigned long (*get_pfn)(struct intel_gvt_gtt_entry *e);
+};
+
+struct intel_gvt_gtt_gma_ops {
+	unsigned long (*gma_to_ggtt_pte_index)(unsigned long gma);
+	unsigned long (*gma_to_pte_index)(unsigned long gma);
+	unsigned long (*gma_to_pde_index)(unsigned long gma);
+	unsigned long (*gma_to_l3_pdp_index)(unsigned long gma);
+	unsigned long (*gma_to_l4_pdp_index)(unsigned long gma);
+	unsigned long (*gma_to_pml4_index)(unsigned long gma);
+};
+
+struct intel_gvt_gtt {
+	struct intel_gvt_gtt_pte_ops *pte_ops;
+	struct intel_gvt_gtt_gma_ops *gma_ops;
+	int (*mm_alloc_page_table)(struct intel_vgpu_mm *mm);
+	void (*mm_free_page_table)(struct intel_vgpu_mm *mm);
+	struct list_head oos_page_use_list_head;
+	struct list_head oos_page_free_list_head;
+	struct list_head mm_lru_list_head;
+};
+
+enum {
+	INTEL_GVT_MM_GGTT = 0,
+	INTEL_GVT_MM_PPGTT,
+};
+
+typedef enum {
+	GTT_TYPE_INVALID = -1,
+
+	GTT_TYPE_GGTT_PTE,
+
+	GTT_TYPE_PPGTT_PTE_4K_ENTRY,
+	GTT_TYPE_PPGTT_PTE_2M_ENTRY,
+	GTT_TYPE_PPGTT_PTE_1G_ENTRY,
+
+	GTT_TYPE_PPGTT_PTE_ENTRY,
+
+	GTT_TYPE_PPGTT_PDE_ENTRY,
+	GTT_TYPE_PPGTT_PDP_ENTRY,
+	GTT_TYPE_PPGTT_PML4_ENTRY,
+
+	GTT_TYPE_PPGTT_ROOT_ENTRY,
+
+	GTT_TYPE_PPGTT_ROOT_L3_ENTRY,
+	GTT_TYPE_PPGTT_ROOT_L4_ENTRY,
+
+	GTT_TYPE_PPGTT_ENTRY,
+
+	GTT_TYPE_PPGTT_PTE_PT,
+	GTT_TYPE_PPGTT_PDE_PT,
+	GTT_TYPE_PPGTT_PDP_PT,
+	GTT_TYPE_PPGTT_PML4_PT,
+
+	GTT_TYPE_MAX,
+} intel_gvt_gtt_type_t;
+
+struct intel_vgpu_mm {
+	int type;
+	bool initialized;
+	bool shadowed;
+
+	int page_table_entry_type;
+	u32 page_table_entry_size;
+	u32 page_table_entry_cnt;
+	void *virtual_page_table;
+	void *shadow_page_table;
+
+	int page_table_level;
+	bool has_shadow_page_table;
+	u32 pde_base_index;
+
+	struct list_head list;
+	struct kref ref;
+	atomic_t pincount;
+	struct list_head lru_list;
+	struct intel_vgpu *vgpu;
+};
+
+extern struct intel_gvt_gtt_entry *intel_vgpu_mm_get_entry(
+		struct intel_vgpu_mm *mm,
+		void *page_table, struct intel_gvt_gtt_entry *e,
+		unsigned long index);
+
+extern struct intel_gvt_gtt_entry *intel_vgpu_mm_set_entry(
+		struct intel_vgpu_mm *mm,
+		void *page_table, struct intel_gvt_gtt_entry *e,
+		unsigned long index);
+
+#define ggtt_get_guest_entry(mm, e, index) \
+	intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index)
+
+#define ggtt_set_guest_entry(mm, e, index) \
+	intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index)
+
+#define ggtt_get_shadow_entry(mm, e, index) \
+	intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index)
+
+#define ggtt_set_shadow_entry(mm, e, index) \
+	intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index)
+
+#define ppgtt_get_guest_root_entry(mm, e, index) \
+	intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index)
+
+#define ppgtt_set_guest_root_entry(mm, e, index) \
+	intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index)
+
+#define ppgtt_get_shadow_root_entry(mm, e, index) \
+	intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index)
+
+#define ppgtt_set_shadow_root_entry(mm, e, index) \
+	intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index)
+
+extern struct intel_vgpu_mm *intel_vgpu_create_mm(struct intel_vgpu *vgpu,
+		int mm_type, void *virtual_page_table, int page_table_level,
+		u32 pde_base_index);
+extern void intel_vgpu_destroy_mm(struct kref *mm_ref);
+
+struct intel_vgpu_guest_page;
+
+struct intel_vgpu_scratch_pt {
+	struct page *page;
+	unsigned long page_mfn;
+};
+
+
+struct intel_vgpu_gtt {
+	struct intel_vgpu_mm *ggtt_mm;
+	unsigned long active_ppgtt_mm_bitmap;
+	struct list_head mm_list_head;
+	DECLARE_HASHTABLE(shadow_page_hash_table, INTEL_GVT_GTT_HASH_BITS);
+	DECLARE_HASHTABLE(guest_page_hash_table, INTEL_GVT_GTT_HASH_BITS);
+	atomic_t n_write_protected_guest_page;
+	struct list_head oos_page_list_head;
+	struct list_head post_shadow_list_head;
+	struct intel_vgpu_scratch_pt scratch_pt[GTT_TYPE_MAX];
+
+};
+
+extern int intel_vgpu_init_gtt(struct intel_vgpu *vgpu);
+extern void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu);
+
+extern int intel_gvt_init_gtt(struct intel_gvt *gvt);
+extern void intel_gvt_clean_gtt(struct intel_gvt *gvt);
+
+extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu,
+		int page_table_level, void *root_entry);
+
+struct intel_vgpu_oos_page;
+
+struct intel_vgpu_shadow_page {
+	void *vaddr;
+	struct page *page;
+	int type;
+	struct hlist_node node;
+	unsigned long mfn;
+};
+
+struct intel_vgpu_guest_page {
+	struct hlist_node node;
+	bool writeprotection;
+	unsigned long gfn;
+	int (*handler)(void *, u64, void *, int);
+	void *data;
+	unsigned long write_cnt;
+	struct intel_vgpu_oos_page *oos_page;
+};
+
+struct intel_vgpu_oos_page {
+	struct intel_vgpu_guest_page *guest_page;
+	struct list_head list;
+	struct list_head vm_list;
+	int id;
+	unsigned char mem[GTT_PAGE_SIZE];
+};
+
+#define GTT_ENTRY_NUM_IN_ONE_PAGE 512
+
+struct intel_vgpu_ppgtt_spt {
+	struct intel_vgpu_shadow_page shadow_page;
+	struct intel_vgpu_guest_page guest_page;
+	int guest_page_type;
+	atomic_t refcount;
+	struct intel_vgpu *vgpu;
+	DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE);
+	struct list_head post_shadow_list;
+};
+
+int intel_vgpu_init_guest_page(struct intel_vgpu *vgpu,
+		struct intel_vgpu_guest_page *guest_page,
+		unsigned long gfn,
+		int (*handler)(void *gp, u64, void *, int),
+		void *data);
+
+void intel_vgpu_clean_guest_page(struct intel_vgpu *vgpu,
+		struct intel_vgpu_guest_page *guest_page);
+
+int intel_vgpu_set_guest_page_writeprotection(struct intel_vgpu *vgpu,
+		struct intel_vgpu_guest_page *guest_page);
+
+void intel_vgpu_clear_guest_page_writeprotection(struct intel_vgpu *vgpu,
+		struct intel_vgpu_guest_page *guest_page);
+
+struct intel_vgpu_guest_page *intel_vgpu_find_guest_page(
+		struct intel_vgpu *vgpu, unsigned long gfn);
+
+int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu);
+
+int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu);
+
+static inline void intel_gvt_mm_reference(struct intel_vgpu_mm *mm)
+{
+	kref_get(&mm->ref);
+}
+
+static inline void intel_gvt_mm_unreference(struct intel_vgpu_mm *mm)
+{
+	kref_put(&mm->ref, intel_vgpu_destroy_mm);
+}
+
+int intel_vgpu_pin_mm(struct intel_vgpu_mm *mm);
+
+void intel_vgpu_unpin_mm(struct intel_vgpu_mm *mm);
+
+unsigned long intel_vgpu_gma_to_gpa(struct intel_vgpu_mm *mm,
+		unsigned long gma);
+
+struct intel_vgpu_mm *intel_vgpu_find_ppgtt_mm(struct intel_vgpu *vgpu,
+		int page_table_level, void *root_entry);
+
+int intel_vgpu_g2v_create_ppgtt_mm(struct intel_vgpu *vgpu,
+		int page_table_level);
+
+int intel_vgpu_g2v_destroy_ppgtt_mm(struct intel_vgpu *vgpu,
+		int page_table_level);
+
+int intel_vgpu_emulate_gtt_mmio_read(struct intel_vgpu *vgpu,
+	unsigned int off, void *p_data, unsigned int bytes);
+
+int intel_vgpu_emulate_gtt_mmio_write(struct intel_vgpu *vgpu,
+	unsigned int off, void *p_data, unsigned int bytes);
+
+#endif /* _GVT_GTT_H_ */