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/*
* include/linux/nvmap.h
*
* structure declarations for nvmem and nvmap user-space ioctls
*
* Copyright (c) 2009-2012, NVIDIA CORPORATION. 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 as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/ioctl.h>
#include <linux/file.h>
#include <linux/rbtree.h>
#if !defined(__KERNEL__)
#define __user
#endif
#ifndef _LINUX_NVMAP_H
#define _LINUX_NVMAP_H
#define NVMAP_HEAP_SYSMEM (1ul<<31)
#define NVMAP_HEAP_IOVMM (1ul<<30)
/* common carveout heaps */
#define NVMAP_HEAP_CARVEOUT_IRAM (1ul<<29)
#define NVMAP_HEAP_CARVEOUT_VPR (1ul<<28)
#define NVMAP_HEAP_CARVEOUT_GENERIC (1ul<<0)
#define NVMAP_HEAP_CARVEOUT_MASK (NVMAP_HEAP_IOVMM - 1)
/* allocation flags */
#define NVMAP_HANDLE_UNCACHEABLE (0x0ul << 0)
#define NVMAP_HANDLE_WRITE_COMBINE (0x1ul << 0)
#define NVMAP_HANDLE_INNER_CACHEABLE (0x2ul << 0)
#define NVMAP_HANDLE_CACHEABLE (0x3ul << 0)
#define NVMAP_HANDLE_CACHE_FLAG (0x3ul << 0)
#define NVMAP_HANDLE_SECURE (0x1ul << 2)
#define NVMAP_HANDLE_ZEROED_PAGES (0x1ul << 3)
#if defined(__KERNEL__)
#if defined(CONFIG_TEGRA_NVMAP)
struct nvmap_handle;
struct nvmap_client;
struct nvmap_device;
#define nvmap_ref_to_handle(_ref) (*(struct nvmap_handle **)(_ref))
/* Convert User space handle to Kernel. */
#define nvmap_convert_handle_u2k(h) (h)
/* handle_ref objects are client-local references to an nvmap_handle;
* they are distinct objects so that handles can be unpinned and
* unreferenced the correct number of times when a client abnormally
* terminates */
struct nvmap_handle_ref {
struct nvmap_handle *handle;
struct rb_node node;
atomic_t dupes; /* number of times to free on file close */
atomic_t pin; /* number of times to unpin on free */
};
#elif defined(CONFIG_ION_TEGRA)
/* For Ion Mem Manager support through nvmap_* API's. */
#include "../../../../../drivers/gpu/ion/ion_priv.h"
#define nvmap_client ion_client
#define nvmap_device ion_device
#define nvmap_handle ion_handle
#define nvmap_handle_ref ion_handle
#define nvmap_ref_to_handle(_ref) (struct ion_handle *)_ref
/* Convert User space handle to Kernel. */
#define nvmap_convert_handle_u2k(h) ({ \
if ((u32)h >= TASK_SIZE) { \
pr_err("Invalid user space handle."); \
BUG(); \
} \
(*((u32 *)h)); })
#endif /* CONFIG_ION_TEGRA */
#define nvmap_id_to_handle(_id) ((struct nvmap_handle *)(_id))
struct nvmap_client *nvmap_create_client(struct nvmap_device *dev,
const char *name);
struct nvmap_handle_ref *nvmap_alloc(struct nvmap_client *client, size_t size,
size_t align, unsigned int flags,
unsigned int heap_mask);
void nvmap_free(struct nvmap_client *client, struct nvmap_handle_ref *r);
void *nvmap_mmap(struct nvmap_handle_ref *r);
void nvmap_munmap(struct nvmap_handle_ref *r, void *addr);
struct nvmap_client *nvmap_client_get_file(int fd);
struct nvmap_client *nvmap_client_get(struct nvmap_client *client);
void nvmap_client_put(struct nvmap_client *c);
phys_addr_t nvmap_pin(struct nvmap_client *c, struct nvmap_handle_ref *r);
phys_addr_t nvmap_handle_address(struct nvmap_client *c, unsigned long id);
void nvmap_unpin(struct nvmap_client *client, struct nvmap_handle_ref *r);
void nvmap_unpin_handles(struct nvmap_client *client,
struct nvmap_handle **h, int nr);
struct nvmap_handle_ref *nvmap_duplicate_handle_id(struct nvmap_client *client,
unsigned long id);
int nvmap_mark_global(struct nvmap_client *client, struct nvmap_handle_ref *r);
struct nvmap_platform_carveout {
const char *name;
unsigned int usage_mask;
phys_addr_t base;
size_t size;
size_t buddy_size;
};
struct nvmap_platform_data {
const struct nvmap_platform_carveout *carveouts;
unsigned int nr_carveouts;
};
extern struct nvmap_device *nvmap_dev;
#endif /* __KERNEL__ */
#endif /* _LINUX_NVMAP_H */
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