[linux-2.6-block.git] / drivers / gpu / drm / i915 / gvt / gtt.h

/*
 * 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 I915_GTT_PAGE_SHIFT         12

struct intel_vgpu_mm;

#define INTEL_GVT_INVALID_ADDR (~0UL)

struct intel_gvt_gtt_entry {
	u64 val64;
	int type;
};

struct intel_gvt_gtt_pte_ops {
	int (*get_entry)(void *pt,
			 struct intel_gvt_gtt_entry *e,
			 unsigned long index,
			 bool hypervisor_access,
			 unsigned long gpa,
			 struct intel_vgpu *vgpu);
	int (*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);
	void (*set_present)(struct intel_gvt_gtt_entry *e);
	bool (*test_pse)(struct intel_gvt_gtt_entry *e);
	void (*clear_pse)(struct intel_gvt_gtt_entry *e);
	bool (*test_ips)(struct intel_gvt_gtt_entry *e);
	void (*clear_ips)(struct intel_gvt_gtt_entry *e);
	bool (*test_64k_splited)(struct intel_gvt_gtt_entry *e);
	void (*clear_64k_splited)(struct intel_gvt_gtt_entry *e);
	void (*set_64k_splited)(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 mutex ppgtt_mm_lock;
	struct list_head ppgtt_mm_lru_list_head;

	struct page *scratch_page;
	unsigned long scratch_mfn;
};

typedef enum {
	GTT_TYPE_INVALID = -1,

	GTT_TYPE_GGTT_PTE,

	GTT_TYPE_PPGTT_PTE_4K_ENTRY,
	GTT_TYPE_PPGTT_PTE_64K_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;

enum intel_gvt_mm_type {
	INTEL_GVT_MM_GGTT,
	INTEL_GVT_MM_PPGTT,
};

#define GVT_RING_CTX_NR_PDPS	GEN8_3LVL_PDPES

struct intel_gvt_partial_pte {
	unsigned long offset;
	u64 data;
	struct list_head list;
};

struct intel_vgpu_mm {
	enum intel_gvt_mm_type type;
	struct intel_vgpu *vgpu;

	struct kref ref;
	atomic_t pincount;

	union {
		struct {
			intel_gvt_gtt_type_t root_entry_type;
			/*
			 * The 4 PDPs in ring context. For 48bit addressing,
			 * only PDP0 is valid and point to PML4. For 32it
			 * addressing, all 4 are used as true PDPs.
			 */
			u64 guest_pdps[GVT_RING_CTX_NR_PDPS];
			u64 shadow_pdps[GVT_RING_CTX_NR_PDPS];
			bool shadowed;

			struct list_head list;
			struct list_head lru_list;
		} ppgtt_mm;
		struct {
			void *virtual_ggtt;
			struct list_head partial_pte_list;
		} ggtt_mm;
	};
};

struct intel_vgpu_mm *intel_vgpu_create_ppgtt_mm(struct intel_vgpu *vgpu,
		intel_gvt_gtt_type_t root_entry_type, u64 pdps[]);

static inline void intel_vgpu_mm_get(struct intel_vgpu_mm *mm)
{
	kref_get(&mm->ref);
}

void _intel_vgpu_mm_release(struct kref *mm_ref);

static inline void intel_vgpu_mm_put(struct intel_vgpu_mm *mm)
{
	kref_put(&mm->ref, _intel_vgpu_mm_release);
}

static inline void intel_vgpu_destroy_mm(struct intel_vgpu_mm *mm)
{
	intel_vgpu_mm_put(mm);
}

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 ppgtt_mm_list_head;
	struct radix_tree_root spt_tree;
	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);
void intel_vgpu_reset_ggtt(struct intel_vgpu *vgpu, bool invalidate_old);
void intel_vgpu_invalidate_ppgtt(struct intel_vgpu *vgpu);

extern int intel_gvt_init_gtt(struct intel_gvt *gvt);
void intel_vgpu_reset_gtt(struct intel_vgpu *vgpu);
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_ppgtt_spt *spt;
	struct list_head list;
	struct list_head vm_list;
	int id;
	void *mem;
};

#define GTT_ENTRY_NUM_IN_ONE_PAGE 512

/* Represent a vgpu shadow page table. */
struct intel_vgpu_ppgtt_spt {
	atomic_t refcount;
	struct intel_vgpu *vgpu;

	struct {
		intel_gvt_gtt_type_t type;
		bool pde_ips; /* for 64KB PTEs */
		void *vaddr;
		struct page *page;
		unsigned long mfn;
	} shadow_page;

	struct {
		intel_gvt_gtt_type_t type;
		bool pde_ips; /* for 64KB PTEs */
		unsigned long gfn;
		unsigned long write_cnt;
		struct intel_vgpu_oos_page *oos_page;
	} guest_page;

	DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE);
	struct list_head post_shadow_list;
};

int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu);

int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu);

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,
		u64 pdps[]);

struct intel_vgpu_mm *intel_vgpu_get_ppgtt_mm(struct intel_vgpu *vgpu,
		intel_gvt_gtt_type_t root_entry_type, u64 pdps[]);

int intel_vgpu_put_ppgtt_mm(struct intel_vgpu *vgpu, u64 pdps[]);

int intel_vgpu_emulate_ggtt_mmio_read(struct intel_vgpu *vgpu,
	unsigned int off, void *p_data, unsigned int bytes);

int intel_vgpu_emulate_ggtt_mmio_write(struct intel_vgpu *vgpu,
	unsigned int off, void *p_data, unsigned int bytes);

#endif /* _GVT_GTT_H_ */
Commit	Line	Data
	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	void *mem;
	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_ */