drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h

/*
 * Copyright 2018 Advanced Micro Devices, Inc.
 * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */
#ifndef __AMDGPU_GMC_H__
#define __AMDGPU_GMC_H__

#include <linux/types.h>

#include "amdgpu_irq.h"

struct firmware;

/*
 * VMHUB structures, functions & helpers
 */
struct amdgpu_vmhub {
	uint32_t	ctx0_ptb_addr_lo32;
	uint32_t	ctx0_ptb_addr_hi32;
	uint32_t	vm_inv_eng0_req;
	uint32_t	vm_inv_eng0_ack;
	uint32_t	vm_context0_cntl;
	uint32_t	vm_l2_pro_fault_status;
	uint32_t	vm_l2_pro_fault_cntl;
};

/*
 * GPU MC structures, functions & helpers
 */
struct amdgpu_gmc_funcs {
	/* flush the vm tlb via mmio */
	void (*flush_gpu_tlb)(struct amdgpu_device *adev,
			      uint32_t vmid);
	/* flush the vm tlb via ring */
	uint64_t (*emit_flush_gpu_tlb)(struct amdgpu_ring *ring, unsigned vmid,
				       uint64_t pd_addr);
	/* Change the VMID -> PASID mapping */
	void (*emit_pasid_mapping)(struct amdgpu_ring *ring, unsigned vmid,
				   unsigned pasid);
	/* write pte/pde updates using the cpu */
	int (*set_pte_pde)(struct amdgpu_device *adev,
			   void *cpu_pt_addr, /* cpu addr of page table */
			   uint32_t gpu_page_idx, /* pte/pde to update */
			   uint64_t addr, /* addr to write into pte/pde */
			   uint64_t flags); /* access flags */
	/* enable/disable PRT support */
	void (*set_prt)(struct amdgpu_device *adev, bool enable);
	/* set pte flags based per asic */
	uint64_t (*get_vm_pte_flags)(struct amdgpu_device *adev,
				     uint32_t flags);
	/* get the pde for a given mc addr */
	void (*get_vm_pde)(struct amdgpu_device *adev, int level,
			   u64 *dst, u64 *flags);
};

struct amdgpu_gmc {
	resource_size_t		aper_size;
	resource_size_t		aper_base;
	/* for some chips with <= 32MB we need to lie
	 * about vram size near mc fb location */
	u64			mc_vram_size;
	u64			visible_vram_size;
	u64			gart_size;
	u64			gart_start;
	u64			gart_end;
	u64			vram_start;
	u64			vram_end;
	unsigned		vram_width;
	u64			real_vram_size;
	int			vram_mtrr;
	u64                     mc_mask;
	const struct firmware   *fw;	/* MC firmware */
	uint32_t                fw_version;
	struct amdgpu_irq_src	vm_fault;
	uint32_t		vram_type;
	uint32_t                srbm_soft_reset;
	bool			prt_warning;
	uint64_t		stolen_size;
	/* apertures */
	u64			shared_aperture_start;
	u64			shared_aperture_end;
	u64			private_aperture_start;
	u64			private_aperture_end;
	/* protects concurrent invalidation */
	spinlock_t		invalidate_lock;
	bool			translate_further;
	struct kfd_vm_fault_info *vm_fault_info;
	atomic_t		vm_fault_info_updated;

	const struct amdgpu_gmc_funcs	*gmc_funcs;
};

/**
 * amdgpu_gmc_vram_full_visible - Check if full VRAM is visible through the BAR
 *
 * @adev: amdgpu_device pointer
 *
 * Returns:
 * True if full VRAM is visible through the BAR
 */
static inline bool amdgpu_gmc_vram_full_visible(struct amdgpu_gmc *gmc)
{
	WARN_ON(gmc->real_vram_size < gmc->visible_vram_size);

	return (gmc->real_vram_size == gmc->visible_vram_size);
}

#endif