drivers/gpu/msm/kgsl_iommu.h - kernel/msm-4.9 - Gitiles

 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */
 #ifndef __KGSL_IOMMU_H
 #define __KGSL_IOMMU_H

 #ifdef CONFIG_QCOM_IOMMU
 #include <linux/qcom_iommu.h>
 #endif
 #include <linux/of.h>
 #include "kgsl.h"

 /*
  * These defines control the address range for allocations that
  * are mapped into all pagetables.
  */
 #define KGSL_IOMMU_GLOBAL_MEM_SIZE	(20 * SZ_1M)
 #define KGSL_IOMMU_GLOBAL_MEM_BASE32	0xf8000000
 #define KGSL_IOMMU_GLOBAL_MEM_BASE64	0xfc000000

 #define KGSL_IOMMU_GLOBAL_MEM_BASE(__mmu)	\
 	(MMU_FEATURE(__mmu, KGSL_MMU_64BIT) ? \
 		KGSL_IOMMU_GLOBAL_MEM_BASE64 : KGSL_IOMMU_GLOBAL_MEM_BASE32)

 #define KGSL_IOMMU_SECURE_SIZE SZ_256M
 #define KGSL_IOMMU_SECURE_END(_mmu) KGSL_IOMMU_GLOBAL_MEM_BASE(_mmu)
 #define KGSL_IOMMU_SECURE_BASE(_mmu)	\
 	(KGSL_IOMMU_GLOBAL_MEM_BASE(_mmu) - KGSL_IOMMU_SECURE_SIZE)

 #define KGSL_IOMMU_SVM_BASE32		0x300000
 #define KGSL_IOMMU_SVM_END32		(0xC0000000 - SZ_16M)

 #define KGSL_IOMMU_VA_BASE64		0x500000000ULL
 #define KGSL_IOMMU_VA_END64		0x600000000ULL
 /*
  * Note: currently we only support 36 bit addresses,
  * but the CPU supports 39. Eventually this range
  * should change to high part of the 39 bit address
  * space just like the CPU.
  */
 #define KGSL_IOMMU_SVM_BASE64		0x700000000ULL
 #define KGSL_IOMMU_SVM_END64		0x800000000ULL

 /* TLBSTATUS register fields */
 #define KGSL_IOMMU_CTX_TLBSTATUS_SACTIVE BIT(0)

 /* IMPLDEF_MICRO_MMU_CTRL register fields */
 #define KGSL_IOMMU_IMPLDEF_MICRO_MMU_CTRL_HALT  0x00000004
 #define KGSL_IOMMU_IMPLDEF_MICRO_MMU_CTRL_IDLE  0x00000008

 /* SCTLR fields */
 #define KGSL_IOMMU_SCTLR_HUPCF_SHIFT		8
 #define KGSL_IOMMU_SCTLR_CFCFG_SHIFT		7
 #define KGSL_IOMMU_SCTLR_CFIE_SHIFT		6

 enum kgsl_iommu_reg_map {
 	KGSL_IOMMU_CTX_SCTLR = 0,
 	KGSL_IOMMU_CTX_TTBR0,
 	KGSL_IOMMU_CTX_CONTEXTIDR,
 	KGSL_IOMMU_CTX_FSR,
 	KGSL_IOMMU_CTX_FAR,
 	KGSL_IOMMU_CTX_TLBIALL,
 	KGSL_IOMMU_CTX_RESUME,
 	KGSL_IOMMU_CTX_FSYNR0,
 	KGSL_IOMMU_CTX_FSYNR1,
 	KGSL_IOMMU_CTX_TLBSYNC,
 	KGSL_IOMMU_CTX_TLBSTATUS,
 	KGSL_IOMMU_REG_MAX
 };

 /* Max number of iommu clks per IOMMU unit */
 #define KGSL_IOMMU_MAX_CLKS 5

 enum kgsl_iommu_context_id {
 	KGSL_IOMMU_CONTEXT_USER = 0,
 	KGSL_IOMMU_CONTEXT_SECURE = 1,
 	KGSL_IOMMU_CONTEXT_MAX,
 };

 /* offset at which a nop command is placed in setstate */
 #define KGSL_IOMMU_SETSTATE_NOP_OFFSET	1024

 /*
  * struct kgsl_iommu_context - Structure holding data about an iommu context
  * bank
  * @dev: pointer to the iommu context's device
  * @name: context name
  * @id: The id of the context, used for deciding how it is used.
  * @cb_num: The hardware context bank number, used for calculating register
  *		offsets.
  * @kgsldev: The kgsl device that uses this context.
  * @fault: Flag when set indicates that this iommu device has caused a page
  * fault
  * @gpu_offset: Offset of this context bank in the GPU register space
  * @default_pt: The default pagetable for this context,
  *		it may be changed by self programming.
  */
 struct kgsl_iommu_context {
 	struct device *dev;
 	const char *name;
 	enum kgsl_iommu_context_id id;
 	unsigned int cb_num;
 	struct kgsl_device *kgsldev;
 	int fault;
 	void __iomem *regbase;
 	unsigned int gpu_offset;
 	struct kgsl_pagetable *default_pt;
 };

 /*
  * struct kgsl_iommu - Structure holding iommu data for kgsl driver
  * @ctx: Array of kgsl_iommu_context structs
  * @regbase: Virtual address of the IOMMU register base
  * @regstart: Physical address of the iommu registers
  * @regsize: Length of the iommu register region.
  * @setstate: Scratch GPU memory for IOMMU operations
  * @clk_enable_count: The ref count of clock enable calls
  * @clks: Array of pointers to IOMMU clocks
  * @micro_mmu_ctrl: GPU register offset of this glob al register
  * @smmu_info: smmu info used in a5xx preemption
  * @protect: register protection settings for the iommu.
  * @pagefault_suppression_count: Total number of pagefaults
  *				 suppressed since boot.
  */
 struct kgsl_iommu {
 	struct kgsl_iommu_context ctx[KGSL_IOMMU_CONTEXT_MAX];
 	void __iomem *regbase;
 	unsigned long regstart;
 	unsigned int regsize;
 	struct kgsl_memdesc setstate;
 	atomic_t clk_enable_count;
 	struct clk *clks[KGSL_IOMMU_MAX_CLKS];
 	unsigned int micro_mmu_ctrl;
 	struct kgsl_memdesc smmu_info;
 	unsigned int version;
 	struct kgsl_protected_registers protect;
 	u32 pagefault_suppression_count;
 };

 /*
  * struct kgsl_iommu_pt - Iommu pagetable structure private to kgsl driver
  * @domain: Pointer to the iommu domain that contains the iommu pagetable
  * @ttbr0: register value to set when using this pagetable
  * @contextidr: register value to set when using this pagetable
  * @attached: is the pagetable attached?
  * @rbtree: all buffers mapped into the pagetable, indexed by gpuaddr
  * @va_start: Start of virtual range used in this pagetable.
  * @va_end: End of virtual range.
  * @svm_start: Start of shared virtual memory range. Addresses in this
  *		range are also valid in the process's CPU address space.
  * @svm_end: End of the shared virtual memory range.
  * @svm_start: 32 bit compatible range, for old clients who lack bits
  * @svm_end: end of 32 bit compatible range
  */
 struct kgsl_iommu_pt {
 	struct iommu_domain *domain;
 	u64 ttbr0;
 	u32 contextidr;
 	bool attached;

 	struct rb_root rbtree;

 	uint64_t va_start;
 	uint64_t va_end;
 	uint64_t svm_start;
 	uint64_t svm_end;
 	uint64_t compat_va_start;
 	uint64_t compat_va_end;
 };

 /*
  * offset of context bank 0 from the start of the SMMU register space.
  */
 #define KGSL_IOMMU_CB0_OFFSET		0x8000
 /* size of each context bank's register space */
 #define KGSL_IOMMU_CB_SHIFT		12

 /* Macros to read/write IOMMU registers */
 extern const unsigned int kgsl_iommu_reg_list[KGSL_IOMMU_REG_MAX];

 /*
  * Don't use this function directly. Use the macros below to read/write
  * IOMMU registers.
  */
 static inline void __iomem *
 kgsl_iommu_reg(struct kgsl_iommu_context *ctx, enum kgsl_iommu_reg_map reg)
 {
 	return ctx->regbase + kgsl_iommu_reg_list[reg];
 }

 #define KGSL_IOMMU_SET_CTX_REG_Q(_ctx, REG, val) \
 		writeq_relaxed((val), \
 			kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))

 #define KGSL_IOMMU_GET_CTX_REG_Q(_ctx, REG) \
 		readq_relaxed(kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))

 #define KGSL_IOMMU_SET_CTX_REG(_ctx, REG, val) \
 		writel_relaxed((val), \
 			kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))

 #define KGSL_IOMMU_GET_CTX_REG(_ctx, REG) \
 		readl_relaxed(kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))


 #endif
	/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/
	#ifndef __KGSL_IOMMU_H
	#define __KGSL_IOMMU_H

	#ifdef CONFIG_QCOM_IOMMU
	#include <linux/qcom_iommu.h>
	#endif
	#include <linux/of.h>
	#include "kgsl.h"

	/*
	* These defines control the address range for allocations that
	* are mapped into all pagetables.
	*/
	#define KGSL_IOMMU_GLOBAL_MEM_SIZE (20 * SZ_1M)
	#define KGSL_IOMMU_GLOBAL_MEM_BASE32 0xf8000000
	#define KGSL_IOMMU_GLOBAL_MEM_BASE64 0xfc000000

	#define KGSL_IOMMU_GLOBAL_MEM_BASE(__mmu) \
	(MMU_FEATURE(__mmu, KGSL_MMU_64BIT) ? \
	KGSL_IOMMU_GLOBAL_MEM_BASE64 : KGSL_IOMMU_GLOBAL_MEM_BASE32)

	#define KGSL_IOMMU_SECURE_SIZE SZ_256M
	#define KGSL_IOMMU_SECURE_END(_mmu) KGSL_IOMMU_GLOBAL_MEM_BASE(_mmu)
	#define KGSL_IOMMU_SECURE_BASE(_mmu) \
	(KGSL_IOMMU_GLOBAL_MEM_BASE(_mmu) - KGSL_IOMMU_SECURE_SIZE)

	#define KGSL_IOMMU_SVM_BASE32 0x300000
	#define KGSL_IOMMU_SVM_END32 (0xC0000000 - SZ_16M)

	#define KGSL_IOMMU_VA_BASE64 0x500000000ULL
	#define KGSL_IOMMU_VA_END64 0x600000000ULL
	/*
	* Note: currently we only support 36 bit addresses,
	* but the CPU supports 39. Eventually this range
	* should change to high part of the 39 bit address
	* space just like the CPU.
	*/
	#define KGSL_IOMMU_SVM_BASE64 0x700000000ULL
	#define KGSL_IOMMU_SVM_END64 0x800000000ULL

	/* TLBSTATUS register fields */
	#define KGSL_IOMMU_CTX_TLBSTATUS_SACTIVE BIT(0)

	/* IMPLDEF_MICRO_MMU_CTRL register fields */
	#define KGSL_IOMMU_IMPLDEF_MICRO_MMU_CTRL_HALT 0x00000004
	#define KGSL_IOMMU_IMPLDEF_MICRO_MMU_CTRL_IDLE 0x00000008

	/* SCTLR fields */
	#define KGSL_IOMMU_SCTLR_HUPCF_SHIFT 8
	#define KGSL_IOMMU_SCTLR_CFCFG_SHIFT 7
	#define KGSL_IOMMU_SCTLR_CFIE_SHIFT 6

	enum kgsl_iommu_reg_map {
	KGSL_IOMMU_CTX_SCTLR = 0,
	KGSL_IOMMU_CTX_TTBR0,
	KGSL_IOMMU_CTX_CONTEXTIDR,
	KGSL_IOMMU_CTX_FSR,
	KGSL_IOMMU_CTX_FAR,
	KGSL_IOMMU_CTX_TLBIALL,
	KGSL_IOMMU_CTX_RESUME,
	KGSL_IOMMU_CTX_FSYNR0,
	KGSL_IOMMU_CTX_FSYNR1,
	KGSL_IOMMU_CTX_TLBSYNC,
	KGSL_IOMMU_CTX_TLBSTATUS,
	KGSL_IOMMU_REG_MAX
	};

	/* Max number of iommu clks per IOMMU unit */
	#define KGSL_IOMMU_MAX_CLKS 5

	enum kgsl_iommu_context_id {
	KGSL_IOMMU_CONTEXT_USER = 0,
	KGSL_IOMMU_CONTEXT_SECURE = 1,
	KGSL_IOMMU_CONTEXT_MAX,
	};

	/* offset at which a nop command is placed in setstate */
	#define KGSL_IOMMU_SETSTATE_NOP_OFFSET 1024

	/*
	* struct kgsl_iommu_context - Structure holding data about an iommu context
	* bank
	* @dev: pointer to the iommu context's device
	* @name: context name
	* @id: The id of the context, used for deciding how it is used.
	* @cb_num: The hardware context bank number, used for calculating register
	* offsets.
	* @kgsldev: The kgsl device that uses this context.
	* @fault: Flag when set indicates that this iommu device has caused a page
	* fault
	* @gpu_offset: Offset of this context bank in the GPU register space
	* @default_pt: The default pagetable for this context,
	* it may be changed by self programming.
	*/
	struct kgsl_iommu_context {
	struct device *dev;
	const char *name;
	enum kgsl_iommu_context_id id;
	unsigned int cb_num;
	struct kgsl_device *kgsldev;
	int fault;
	void __iomem *regbase;
	unsigned int gpu_offset;
	struct kgsl_pagetable *default_pt;
	};

	/*
	* struct kgsl_iommu - Structure holding iommu data for kgsl driver
	* @ctx: Array of kgsl_iommu_context structs
	* @regbase: Virtual address of the IOMMU register base
	* @regstart: Physical address of the iommu registers
	* @regsize: Length of the iommu register region.
	* @setstate: Scratch GPU memory for IOMMU operations
	* @clk_enable_count: The ref count of clock enable calls
	* @clks: Array of pointers to IOMMU clocks
	* @micro_mmu_ctrl: GPU register offset of this glob al register
	* @smmu_info: smmu info used in a5xx preemption
	* @protect: register protection settings for the iommu.
	* @pagefault_suppression_count: Total number of pagefaults
	* suppressed since boot.
	*/
	struct kgsl_iommu {
	struct kgsl_iommu_context ctx[KGSL_IOMMU_CONTEXT_MAX];
	void __iomem *regbase;
	unsigned long regstart;
	unsigned int regsize;
	struct kgsl_memdesc setstate;
	atomic_t clk_enable_count;
	struct clk *clks[KGSL_IOMMU_MAX_CLKS];
	unsigned int micro_mmu_ctrl;
	struct kgsl_memdesc smmu_info;
	unsigned int version;
	struct kgsl_protected_registers protect;
	u32 pagefault_suppression_count;
	};

	/*
	* struct kgsl_iommu_pt - Iommu pagetable structure private to kgsl driver
	* @domain: Pointer to the iommu domain that contains the iommu pagetable
	* @ttbr0: register value to set when using this pagetable
	* @contextidr: register value to set when using this pagetable
	* @attached: is the pagetable attached?
	* @rbtree: all buffers mapped into the pagetable, indexed by gpuaddr
	* @va_start: Start of virtual range used in this pagetable.
	* @va_end: End of virtual range.
	* @svm_start: Start of shared virtual memory range. Addresses in this
	* range are also valid in the process's CPU address space.
	* @svm_end: End of the shared virtual memory range.
	* @svm_start: 32 bit compatible range, for old clients who lack bits
	* @svm_end: end of 32 bit compatible range
	*/
	struct kgsl_iommu_pt {
	struct iommu_domain *domain;
	u64 ttbr0;
	u32 contextidr;
	bool attached;

	struct rb_root rbtree;

	uint64_t va_start;
	uint64_t va_end;
	uint64_t svm_start;
	uint64_t svm_end;
	uint64_t compat_va_start;
	uint64_t compat_va_end;
	};

	/*
	* offset of context bank 0 from the start of the SMMU register space.
	*/
	#define KGSL_IOMMU_CB0_OFFSET 0x8000
	/* size of each context bank's register space */
	#define KGSL_IOMMU_CB_SHIFT 12

	/* Macros to read/write IOMMU registers */
	extern const unsigned int kgsl_iommu_reg_list[KGSL_IOMMU_REG_MAX];

	/*
	* Don't use this function directly. Use the macros below to read/write
	* IOMMU registers.
	*/
	static inline void __iomem *
	kgsl_iommu_reg(struct kgsl_iommu_context *ctx, enum kgsl_iommu_reg_map reg)
	{
	return ctx->regbase + kgsl_iommu_reg_list[reg];
	}

	#define KGSL_IOMMU_SET_CTX_REG_Q(_ctx, REG, val) \
	writeq_relaxed((val), \
	kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))

	#define KGSL_IOMMU_GET_CTX_REG_Q(_ctx, REG) \
	readq_relaxed(kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))

	#define KGSL_IOMMU_SET_CTX_REG(_ctx, REG, val) \
	writel_relaxed((val), \
	kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))

	#define KGSL_IOMMU_GET_CTX_REG(_ctx, REG) \
	readl_relaxed(kgsl_iommu_reg((_ctx), KGSL_IOMMU_CTX_##REG))


	#endif