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linux-nv-oot/include/linux/nvhost.h
Mainak Sen bfe763841a gpu: host1x: Deprecate falcon implementation from host1x driver 
This commit deprecates the falcon hardware interface implementation from the host1x-nvhost driver.

falcon_exit() function will be deprecated once usage of
nvhost_module_deinit API is removed from PVA/DLA/Camera elements.

Jira HOSTX-5933

Bug 4918838

Change-Id: I268836c8c8fc2f1ab060412bb4446c7080f846c4
Signed-off-by: Mainak Sen <msen@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3311319
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Sanif Veeras <sveeras@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
2025-07-24 10:19:16 +00:00

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/* SPDX-License-Identifier: GPL-2.0-only */
/* SPDX-FileCopyrightText: Copyright (c) 2009-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
#ifndef __LINUX_NVHOST_H
#define __LINUX_NVHOST_H
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/host1x.h>
#include <linux/platform_device.h>
struct nvhost_ctrl_sync_fence_info;
struct nvhost_fence;
#define NVHOST_MODULE_MAX_CLOCKS 8
#define NVHOST_MODULE_MAX_IORESOURCE_MEM 5
struct nvhost_notification {
struct { /* 0000- */
__u32 nanoseconds[2]; /* nanoseconds since Jan. 1, 1970 */
} time_stamp; /* -0007 */
__u32 info32; /* info returned depends on method 0008-000b */
__u16 info16; /* info returned depends on method 000c-000d */
__u16 status; /* user sets bit 15, NV sets status 000e-000f */
};
struct nvhost_gating_register {
u64 addr;
u32 prod;
u32 disable;
};
enum tegra_emc_request_type {
TEGRA_SET_EMC_FLOOR, /* lower bound */
};
struct nvhost_clock {
char *name;
unsigned long default_rate;
u32 moduleid;
enum tegra_emc_request_type request_type;
bool disable_scaling;
unsigned long devfreq_rate;
};
struct nvhost_vm_hwid {
u64 addr;
bool dynamic;
u32 shift;
};
/*
* Defines HW and SW class identifiers.
*
* This is module ID mapping between userspace and kernelspace.
* The values of enum entries' are referred from NvRmModuleID enum defined
* in below userspace file:
* $TOP/vendor/nvidia/tegra/core/include/nvrm_module.h
* Please make sure each entry below has same value as set in above file.
*/
enum nvhost_module_identifier {
/* Specifies external memory (DDR RAM, etc) */
NVHOST_MODULE_ID_EXTERNAL_MEMORY_CONTROLLER = 75,
};
enum nvhost_resource_policy {
RESOURCE_PER_DEVICE = 0,
RESOURCE_PER_CHANNEL_INSTANCE,
};
struct nvhost_device_data {
int version; /* ip version number of device */
void __iomem *aperture[NVHOST_MODULE_MAX_IORESOURCE_MEM];
u32 moduleid; /* Module id for user space API */
/* interrupt ISR routine for falcon based engines */
int (*flcn_isr)(struct platform_device *dev);
int irq;
int module_irq; /* IRQ bit from general intr reg for module intr */
bool self_config_flcn_isr; /* skip setting up falcon interrupts */
u32 class; /* Device class */
bool keepalive; /* Do not power gate when opened */
bool serialize; /* Serialize submits in the channel */
bool push_work_done; /* Push_op done into push buffer */
bool poweron_reset; /* Reset the engine before powerup */
char *devfs_name; /* Name in devfs */
char *devfs_name_family; /* Core of devfs name */
char *firmware_name; /* Name of firmware */
bool firmware_not_in_subdir; /* Firmware is not located in
chip subdirectory */
bool engine_can_cg; /* True if CG is enabled */
bool can_powergate; /* True if module can be power gated */
int autosuspend_delay;/* Delay before power gated */
struct nvhost_clock clocks[NVHOST_MODULE_MAX_CLOCKS];/* Clock names */
/* Clock gating registers */
struct nvhost_gating_register *engine_cg_regs;
int num_clks; /* Number of clocks opened for dev */
struct clk_bulk_data *clks;
struct mutex lock; /* Power management lock */
int num_channels; /* Max num of channel supported */
int num_ppc; /* Number of pixels per clock cycle */
dev_t cdev_region;
/* device node for ctrl block */
struct class *nvhost_class;
struct device *ctrl_node;
struct cdev ctrl_cdev;
const struct file_operations *ctrl_ops; /* ctrl ops for the module */
struct kobject clk_cap_kobj;
struct kobj_attribute *clk_cap_attrs;
struct dentry *debugfs; /* debugfs directory */
/* Marks if the device is booted when pm runtime is disabled */
bool booted;
void *private_data; /* private platform data */
void *falcon_data; /* store the falcon info */
struct platform_device *pdev; /* owner platform_device */
struct host1x *host1x; /* host1x device */
/* Finalize power on. Can be used for context restore. */
int (*finalize_poweron)(struct platform_device *dev);
/* Preparing for power off. Used for context save. */
int (*prepare_poweroff)(struct platform_device *dev);
/* paring for power off. Used for context save. */
int (*aggregate_constraints)(struct platform_device *dev,
int clk_index,
unsigned long floor_rate,
unsigned long pixel_rate,
unsigned long bw_rate);
/* Used to add platform specific masks on reloc address */
dma_addr_t (*get_reloc_phys_addr)(dma_addr_t phys_addr, u32 reloc_type);
/* engine specific init functions */
int (*pre_virt_init)(struct platform_device *pdev);
int (*post_virt_init)(struct platform_device *pdev);
/* Information related to engine-side synchronization */
void *syncpt_unit_interface;
u64 transcfg_addr;
u32 transcfg_val;
struct nvhost_vm_hwid vm_regs[13];
/* Should we map channel at submit time? */
bool resource_policy;
/* Should we enable context isolation for this device? */
bool isolate_contexts;
/* reset control for this device */
struct reset_control *reset_control;
/* icc client id for emc requests */
int icc_id;
/* icc_path handle handle */
struct icc_path *icc_path_handle;
/* bandwidth manager client id for emc requests */
int bwmgr_client_id;
};
static inline
struct nvhost_device_data *nvhost_get_devdata(struct platform_device *pdev)
{
return (struct nvhost_device_data *)platform_get_drvdata(pdev);
}
/* public api to return platform_device ptr to the default host1x instance */
struct platform_device *nvhost_get_default_device(void);
struct platform_device *nvhost_get_host1x_device(int instance);
/* common runtime pm and power domain APIs */
int nvhost_module_init(struct platform_device *ndev);
void nvhost_module_deinit(struct platform_device *dev);
void nvhost_module_reset(struct platform_device *dev, bool reboot);
void nvhost_module_idle(struct platform_device *dev);
void nvhost_module_idle_mult(struct platform_device *pdev, int refs);
int nvhost_module_busy(struct platform_device *dev);
extern const struct dev_pm_ops nvhost_module_pm_ops;
void host1x_writel(struct platform_device *dev, u32 r, u32 v);
u32 host1x_readl(struct platform_device *dev, u32 r);
/* common device management APIs */
int nvhost_client_device_get_resources(struct platform_device *dev);
int nvhost_client_device_release(struct platform_device *dev);
int nvhost_client_device_init(struct platform_device *dev);
/* public host1x sync-point management APIs */
u32 nvhost_get_syncpt_host_managed(struct platform_device *pdev,
u32 param, const char *syncpt_name);
u32 nvhost_get_syncpt_client_managed(struct platform_device *pdev,
const char *syncpt_name);
u32 nvhost_get_syncpt_gpu_managed(struct platform_device *pdev,
const char *syncpt_name);
void nvhost_syncpt_put_ref_ext(struct platform_device *pdev, u32 id);
bool nvhost_syncpt_is_valid_pt_ext(struct platform_device *dev, u32 id);
void nvhost_syncpt_set_min_update(struct platform_device *pdev, u32 id, u32 val);
int nvhost_syncpt_read_ext_check(struct platform_device *dev, u32 id, u32 *val);
u32 nvhost_syncpt_read_maxval(struct platform_device *dev, u32 id);
u32 nvhost_syncpt_incr_max_ext(struct platform_device *dev, u32 id, u32 incrs);
int nvhost_syncpt_is_expired_ext(struct platform_device *dev, u32 id,
u32 thresh);
dma_addr_t nvhost_syncpt_address(struct platform_device *engine_pdev, u32 id);
int nvhost_syncpt_unit_interface_init(struct platform_device *pdev);
void nvhost_syncpt_unit_interface_deinit(struct platform_device *pdev);
int nvhost_syncpt_unit_interface_get_aperture(
struct platform_device *host_pdev,
phys_addr_t *base,
size_t *size);
u32 nvhost_syncpt_unit_interface_get_byte_offset(u32 syncpt_id);
u32 nvhost_syncpt_unit_interface_get_byte_offset_ext(
struct platform_device *host_pdev,
u32 syncpt_id);
/* public host1x interrupt management APIs */
int nvhost_intr_register_notifier(struct platform_device *pdev,
u32 id, u32 thresh,
void (*callback)(void *),
void *private_data);
/* public host1x sync-point management APIs */
struct host1x *nvhost_get_host1x(struct platform_device *pdev);
static inline int nvhost_module_set_rate(struct platform_device *dev, void *priv,
unsigned long constraint, int index,
unsigned long attr)
{
return 0;
}
static inline int nvhost_module_add_client(struct platform_device *dev, void *priv)
{
return 0;
}
static inline void nvhost_module_remove_client(struct platform_device *dev, void *priv) { }
static inline int nvhost_fence_create_fd(
struct platform_device *pdev,
struct nvhost_ctrl_sync_fence_info *pts,
u32 num_pts,
const char *name,
s32 *fence_fd)
{
return -EOPNOTSUPP;
}
static inline int nvhost_fence_foreach_pt(
struct nvhost_fence *fence,
int (*iter)(struct nvhost_ctrl_sync_fence_info, void *),
void *data)
{
return -EOPNOTSUPP;
}
static inline struct nvhost_fence *nvhost_fence_get(int fd)
{
return NULL;
}
static inline void nvhost_fence_put(struct nvhost_fence *fence) {}
static inline dma_addr_t nvhost_t194_get_reloc_phys_addr(dma_addr_t phys_addr,
u32 reloc_type)
{
return 0;
}
static inline dma_addr_t nvhost_t23x_get_reloc_phys_addr(dma_addr_t phys_addr,
u32 reloc_type)
{
return 0;
}
#endif
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