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/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __NVGPU_NVGPU_MEM_H__
#define __NVGPU_NVGPU_MEM_H__
#include <linux/types.h>
#include <nvgpu/list.h>
struct page;
struct sg_table;
struct gk20a;
struct nvgpu_allocator;
/*
* Real location of a buffer - nvgpu_aperture_mask() will deduce what will be
* told to the gpu about the aperture, but this flag designates where the
* memory actually was allocated from.
*/
enum nvgpu_aperture {
APERTURE_INVALID, /* unallocated or N/A */
APERTURE_SYSMEM,
APERTURE_VIDMEM
};
struct nvgpu_mem {
void *cpu_va; /* sysmem only */
struct page **pages; /* sysmem only */
struct sg_table *sgt;
enum nvgpu_aperture aperture;
size_t size;
u64 gpu_va;
bool fixed; /* vidmem only */
bool user_mem; /* vidmem only */
struct nvgpu_allocator *allocator; /* vidmem only */
struct nvgpu_list_node clear_list_entry; /* vidmem only */
bool skip_wmb;
unsigned long flags;
};
static inline struct nvgpu_mem *
nvgpu_mem_from_clear_list_entry(struct nvgpu_list_node *node)
{
return (struct nvgpu_mem *)
((uintptr_t)node - offsetof(struct nvgpu_mem,
clear_list_entry));
};
struct nvgpu_mem_sub {
u32 offset;
u32 size;
};
static inline const char *nvgpu_aperture_str(enum nvgpu_aperture aperture)
{
switch (aperture) {
case APERTURE_INVALID: return "invalid";
case APERTURE_SYSMEM: return "sysmem";
case APERTURE_VIDMEM: return "vidmem";
};
return "UNKNOWN";
}
/*
* Buffer accessors - wrap between begin() and end() if there is no permanent
* kernel mapping for this buffer.
*/
int nvgpu_mem_begin(struct gk20a *g, struct nvgpu_mem *mem);
/* nop for null mem, like with free() or vunmap() */
void nvgpu_mem_end(struct gk20a *g, struct nvgpu_mem *mem);
/* word-indexed offset */
u32 nvgpu_mem_rd32(struct gk20a *g, struct nvgpu_mem *mem, u32 w);
/* byte offset (32b-aligned) */
u32 nvgpu_mem_rd(struct gk20a *g, struct nvgpu_mem *mem, u32 offset);
/* memcpy to cpu, offset and size in bytes (32b-aligned) */
void nvgpu_mem_rd_n(struct gk20a *g, struct nvgpu_mem *mem, u32 offset,
void *dest, u32 size);
/* word-indexed offset */
void nvgpu_mem_wr32(struct gk20a *g, struct nvgpu_mem *mem, u32 w, u32 data);
/* byte offset (32b-aligned) */
void nvgpu_mem_wr(struct gk20a *g, struct nvgpu_mem *mem, u32 offset, u32 data);
/* memcpy from cpu, offset and size in bytes (32b-aligned) */
void nvgpu_mem_wr_n(struct gk20a *g, struct nvgpu_mem *mem, u32 offset,
void *src, u32 size);
/* size and offset in bytes (32b-aligned), filled with the constant byte c */
void nvgpu_memset(struct gk20a *g, struct nvgpu_mem *mem, u32 offset,
u32 c, u32 size);
u32 __nvgpu_aperture_mask(struct gk20a *g, enum nvgpu_aperture aperture,
u32 sysmem_mask, u32 vidmem_mask);
u32 nvgpu_aperture_mask(struct gk20a *g, struct nvgpu_mem *mem,
u32 sysmem_mask, u32 vidmem_mask);
#endif
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