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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2009-2013, NVIDIA Corporation. All rights reserved.
*/
#ifndef __LINUX_HOST1X_H
#define __LINUX_HOST1X_H
#include <linux/device.h>
#include <linux/dma-direction.h>
#include <linux/dma-fence.h>
#include <linux/spinlock.h>
#include <linux/types.h>
enum host1x_class {
HOST1X_CLASS_HOST1X = 0x1,
HOST1X_CLASS_GR2D = 0x51,
HOST1X_CLASS_GR2D_SB = 0x52,
HOST1X_CLASS_VIC = 0x5D,
HOST1X_CLASS_GR3D = 0x60,
HOST1X_CLASS_NVDEC = 0xF0,
HOST1X_CLASS_NVDEC1 = 0xF5,
};
struct host1x;
struct host1x_client;
struct iommu_group;
u64 host1x_get_dma_mask(struct host1x *host1x);
/**
* struct host1x_bo_cache - host1x buffer object cache
* @mappings: list of mappings
* @lock: synchronizes accesses to the list of mappings
*
* Note that entries are not periodically evicted from this cache and instead need to be
* explicitly released. This is used primarily for DRM/KMS where the cache's reference is
* released when the last reference to a buffer object represented by a mapping in this
* cache is dropped.
*/
struct host1x_bo_cache {
struct list_head mappings;
struct mutex lock;
};
static inline void host1x_bo_cache_init(struct host1x_bo_cache *cache)
{
INIT_LIST_HEAD(&cache->mappings);
mutex_init(&cache->lock);
}
static inline void host1x_bo_cache_destroy(struct host1x_bo_cache *cache)
{
/* XXX warn if not empty? */
mutex_destroy(&cache->lock);
}
/**
* struct host1x_client_ops - host1x client operations
* @early_init: host1x client early initialization code
* @init: host1x client initialization code
* @exit: host1x client tear down code
* @late_exit: host1x client late tear down code
* @suspend: host1x client suspend code
* @resume: host1x client resume code
*/
struct host1x_client_ops {
int (*early_init)(struct host1x_client *client);
int (*init)(struct host1x_client *client);
int (*exit)(struct host1x_client *client);
int (*late_exit)(struct host1x_client *client);
int (*suspend)(struct host1x_client *client);
int (*resume)(struct host1x_client *client);
};
/**
* struct host1x_client - host1x client structure
* @list: list node for the host1x client
* @host: pointer to struct device representing the host1x controller
* @dev: pointer to struct device backing this host1x client
* @group: IOMMU group that this client is a member of
* @ops: host1x client operations
* @class: host1x class represented by this client
* @channel: host1x channel associated with this client
* @syncpts: array of syncpoints requested for this client
* @num_syncpts: number of syncpoints requested for this client
* @parent: pointer to parent structure
* @usecount: reference count for this structure
* @lock: mutex for mutually exclusive concurrency
* @cache: host1x buffer object cache
*/
struct host1x_client {
struct list_head list;
struct device *host;
struct device *dev;
struct iommu_group *group;
const struct host1x_client_ops *ops;
enum host1x_class class;
struct host1x_channel *channel;
struct host1x_syncpt **syncpts;
unsigned int num_syncpts;
struct host1x_client *parent;
unsigned int usecount;
struct mutex lock;
struct host1x_bo_cache cache;
};
/*
* host1x buffer objects
*/
struct host1x_bo;
struct sg_table;
struct host1x_bo_mapping {
struct kref ref;
struct dma_buf_attachment *attach;
enum dma_data_direction direction;
struct list_head list;
struct host1x_bo *bo;
struct sg_table *sgt;
unsigned int chunks;
struct device *dev;
dma_addr_t phys;
size_t size;
struct host1x_bo_cache *cache;
struct list_head entry;
};
static inline struct host1x_bo_mapping *to_host1x_bo_mapping(struct kref *ref)
{
return container_of(ref, struct host1x_bo_mapping, ref);
}
struct host1x_bo_ops {
struct host1x_bo *(*get)(struct host1x_bo *bo);
void (*put)(struct host1x_bo *bo);
struct host1x_bo_mapping *(*pin)(struct device *dev, struct host1x_bo *bo,
enum dma_data_direction dir);
void (*unpin)(struct host1x_bo_mapping *map);
void *(*mmap)(struct host1x_bo *bo);
void (*munmap)(struct host1x_bo *bo, void *addr);
};
struct host1x_bo {
const struct host1x_bo_ops *ops;
struct list_head mappings;
spinlock_t lock;
};
static inline void host1x_bo_init(struct host1x_bo *bo,
const struct host1x_bo_ops *ops)
{
INIT_LIST_HEAD(&bo->mappings);
spin_lock_init(&bo->lock);
bo->ops = ops;
}
static inline struct host1x_bo *host1x_bo_get(struct host1x_bo *bo)
{
return bo->ops->get(bo);
}
static inline void host1x_bo_put(struct host1x_bo *bo)
{
bo->ops->put(bo);
}
struct host1x_bo_mapping *host1x_bo_pin(struct device *dev, struct host1x_bo *bo,
enum dma_data_direction dir,
struct host1x_bo_cache *cache);
void host1x_bo_unpin(struct host1x_bo_mapping *map);
static inline void *host1x_bo_mmap(struct host1x_bo *bo)
{
return bo->ops->mmap(bo);
}
static inline void host1x_bo_munmap(struct host1x_bo *bo, void *addr)
{
bo->ops->munmap(bo, addr);
}
/*
* host1x syncpoints
*/
#define HOST1X_SYNCPT_CLIENT_MANAGED (1 << 0)
#define HOST1X_SYNCPT_HAS_BASE (1 << 1)
struct host1x_syncpt_base;
struct host1x_syncpt;
struct host1x;
struct host1x_syncpt *host1x_syncpt_get_by_id(struct host1x *host, u32 id);
struct host1x_syncpt *host1x_syncpt_get_by_id_noref(struct host1x *host, u32 id);
struct host1x_syncpt *host1x_syncpt_get(struct host1x_syncpt *sp);
u32 host1x_syncpt_id(struct host1x_syncpt *sp);
u32 host1x_syncpt_read_min(struct host1x_syncpt *sp);
u32 host1x_syncpt_read_max(struct host1x_syncpt *sp);
u32 host1x_syncpt_read(struct host1x_syncpt *sp);
int host1x_syncpt_incr(struct host1x_syncpt *sp);
u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
u32 *value);
struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client,
unsigned long flags);
void host1x_syncpt_put(struct host1x_syncpt *sp);
struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host,
unsigned long flags,
const char *name);
struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp);
u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base);
void host1x_syncpt_release_vblank_reservation(struct host1x_client *client,
u32 syncpt_id);
struct dma_fence *host1x_fence_create(struct host1x_syncpt *sp, u32 threshold,
bool timeout);
void host1x_fence_cancel(struct dma_fence *fence);
/*
* host1x channel
*/
struct host1x_channel;
struct host1x_job;
struct host1x_channel *host1x_channel_request(struct host1x_client *client);
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
void host1x_channel_stop(struct host1x_channel *channel);
void host1x_channel_put(struct host1x_channel *channel);
int host1x_job_submit(struct host1x_job *job);
/*
* host1x job
*/
#define HOST1X_RELOC_READ (1 << 0)
#define HOST1X_RELOC_WRITE (1 << 1)
struct host1x_reloc {
struct {
struct host1x_bo *bo;
unsigned long offset;
} cmdbuf;
struct {
struct host1x_bo *bo;
unsigned long offset;
} target;
unsigned long shift;
unsigned long flags;
};
struct host1x_job {
/* When refcount goes to zero, job can be freed */
struct kref ref;
/* List entry */
struct list_head list;
/* Channel where job is submitted to */
struct host1x_channel *channel;
/* client where the job originated */
struct host1x_client *client;
/* Gathers and their memory */
struct host1x_job_cmd *cmds;
unsigned int num_cmds;
/* Array of handles to be pinned & unpinned */
struct host1x_reloc *relocs;
unsigned int num_relocs;
struct host1x_job_unpin_data *unpins;
unsigned int num_unpins;
dma_addr_t *addr_phys;
dma_addr_t *gather_addr_phys;
dma_addr_t *reloc_addr_phys;
/* Sync point id, number of increments and end related to the submit */
struct host1x_syncpt *syncpt;
u32 syncpt_incrs;
u32 syncpt_end;
/* Completion fence for job tracking */
struct dma_fence *fence;
struct dma_fence_cb fence_cb;
/* Maximum time to wait for this job */
unsigned int timeout;
/* Job has timed out and should be released */
bool cancelled;
/* Index and number of slots used in the push buffer */
unsigned int first_get;
unsigned int num_slots;
/* Copy of gathers */
size_t gather_copy_size;
dma_addr_t gather_copy;
u8 *gather_copy_mapped;
/* Check if register is marked as an address reg */
int (*is_addr_reg)(struct device *dev, u32 class, u32 reg);
/* Check if class belongs to the unit */
int (*is_valid_class)(u32 class);
/* Request a SETCLASS to this class */
u32 class;
/* Add a channel wait for previous ops to complete */
bool serialize;
/* Fast-forward syncpoint increments on job timeout */
bool syncpt_recovery;
/* Callback called when job is freed */
void (*release)(struct host1x_job *job);
void *user_data;
/* Whether host1x-side firewall should be ran for this job or not */
bool enable_firewall;
/* Options for configuring engine data stream ID */
/* Context device to use for job */
struct host1x_memory_context *memory_context;
/* Stream ID to use if context isolation is disabled (!memory_context) */
u32 engine_fallback_streamid;
/* Engine offset to program stream ID to */
u32 engine_streamid_offset;
};
struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
u32 num_cmdbufs, u32 num_relocs,
bool skip_firewall);
void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
unsigned int words, unsigned int offset);
void host1x_job_add_wait(struct host1x_job *job, u32 id, u32 thresh,
bool relative, u32 next_class);
struct host1x_job *host1x_job_get(struct host1x_job *job);
void host1x_job_put(struct host1x_job *job);
int host1x_job_pin(struct host1x_job *job, struct device *dev);
void host1x_job_unpin(struct host1x_job *job);
/*
* subdevice probe infrastructure
*/
struct host1x_device;
/**
* struct host1x_driver - host1x logical device driver
* @driver: core driver
* @subdevs: table of OF device IDs matching subdevices for this driver
* @list: list node for the driver
* @probe: called when the host1x logical device is probed
* @remove: called when the host1x logical device is removed
* @shutdown: called when the host1x logical device is shut down
*/
struct host1x_driver {
struct device_driver driver;
const struct of_device_id *subdevs;
struct list_head list;
int (*probe)(struct host1x_device *device);
int (*remove)(struct host1x_device *device);
void (*shutdown)(struct host1x_device *device);
};
static inline struct host1x_driver *
to_host1x_driver(struct device_driver *driver)
{
return container_of(driver, struct host1x_driver, driver);
}
int host1x_driver_register_full(struct host1x_driver *driver,
struct module *owner);
void host1x_driver_unregister(struct host1x_driver *driver);
#define host1x_driver_register(driver) \
host1x_driver_register_full(driver, THIS_MODULE)
struct host1x_device {
struct host1x_driver *driver;
struct list_head list;
struct device dev;
struct mutex subdevs_lock;
struct list_head subdevs;
struct list_head active;
struct mutex clients_lock;
struct list_head clients;
bool registered;
struct device_dma_parameters dma_parms;
};
static inline struct host1x_device *to_host1x_device(struct device *dev)
{
return container_of(dev, struct host1x_device, dev);
}
int host1x_device_init(struct host1x_device *device);
int host1x_device_exit(struct host1x_device *device);
void __host1x_client_init(struct host1x_client *client, struct lock_class_key *key);
void host1x_client_exit(struct host1x_client *client);
#define host1x_client_init(client) \
({ \
static struct lock_class_key __key; \
__host1x_client_init(client, &__key); \
})
int __host1x_client_register(struct host1x_client *client);
/*
* Note that this wrapper calls __host1x_client_init() for compatibility
* with existing callers. Callers that want to separately initialize and
* register a host1x client must first initialize using either of the
* __host1x_client_init() or host1x_client_init() functions and then use
* the low-level __host1x_client_register() function to avoid the client
* getting reinitialized.
*/
#define host1x_client_register(client) \
({ \
static struct lock_class_key __key; \
__host1x_client_init(client, &__key); \
__host1x_client_register(client); \
})
void host1x_client_unregister(struct host1x_client *client);
int host1x_client_suspend(struct host1x_client *client);
int host1x_client_resume(struct host1x_client *client);
struct tegra_mipi_device;
struct tegra_mipi_device *tegra_mipi_request(struct device *device,
struct device_node *np);
void tegra_mipi_free(struct tegra_mipi_device *device);
int tegra_mipi_enable(struct tegra_mipi_device *device);
int tegra_mipi_disable(struct tegra_mipi_device *device);
int tegra_mipi_start_calibration(struct tegra_mipi_device *device);
int tegra_mipi_finish_calibration(struct tegra_mipi_device *device);
/* host1x memory contexts */
struct host1x_memory_context {
struct host1x *host;
refcount_t ref;
struct pid *owner;
struct device dev;
u64 dma_mask;
u32 stream_id;
};
#ifdef CONFIG_IOMMU_API
struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x,
struct device *dev,
struct pid *pid);
void host1x_memory_context_get(struct host1x_memory_context *cd);
void host1x_memory_context_put(struct host1x_memory_context *cd);
#else
static inline struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x,
struct device *dev,
struct pid *pid)
{
return NULL;
}
static inline void host1x_memory_context_get(struct host1x_memory_context *cd)
{
}
static inline void host1x_memory_context_put(struct host1x_memory_context *cd)
{
}
#endif
#endif