Quelle  panfrost_device.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */

#ifndef __PANFROST_DEVICE_H__
#define __PANFROST_DEVICE_H__

#include <linux/atomic.h>
#include <linux/io-pgtable.h>
#include <linux/pm.h>
#include <linux/regulator/consumer.h>
#include <linux/spinlock.h>
#include <drm/drm_device.h>
#include <drm/drm_mm.h>
#include <drm/gpu_scheduler.h>

#include "panfrost_devfreq.h"

struct panfrost_device;
struct panfrost_mmu;
struct panfrost_job_slot;
struct panfrost_job;
struct panfrost_perfcnt;

#define NUM_JOB_SLOTS 3
#define MAX_PM_DOMAINS 5

enum panfrost_drv_comp_bits {
 PANFROST_COMP_BIT_GPU,
 PANFROST_COMP_BIT_JOB,
 PANFROST_COMP_BIT_MMU,
 PANFROST_COMP_BIT_MAX
};

/**
 * enum panfrost_gpu_pm - Supported kernel power management features
 * @GPU_PM_CLK_DIS:  Allow disabling clocks during system suspend
 * @GPU_PM_VREG_OFF: Allow turning off regulators during system suspend
 * @GPU_PM_RT: Allow disabling clocks and asserting the reset control during
 *  system runtime suspend
 */
enum panfrost_gpu_pm {
 GPU_PM_CLK_DIS,
 GPU_PM_VREG_OFF,
 GPU_PM_RT
};

/**
 * enum panfrost_gpu_quirks - GPU optional quirks
 * @GPU_QUIRK_FORCE_AARCH64_PGTABLE: Use AARCH64_4K page table format
 */
enum panfrost_gpu_quirks {
 GPU_QUIRK_FORCE_AARCH64_PGTABLE,
};

struct panfrost_features {
 u16 id;
 u16 revision;

 u64 shader_present;
 u64 tiler_present;
 u64 l2_present;
 u64 stack_present;
 u32 as_present;
 u32 js_present;

 u32 l2_features;
 u32 core_features;
 u32 tiler_features;
 u32 mem_features;
 u32 mmu_features;
 u32 thread_features;
 u32 max_threads;
 u32 thread_max_workgroup_sz;
 u32 thread_max_barrier_sz;
 u32 coherency_features;
 u32 afbc_features;
 u32 texture_features[4];
 u32 js_features[16];

 u32 nr_core_groups;
 u32 thread_tls_alloc;

 unsigned long hw_features[64 / BITS_PER_LONG];
 unsigned long hw_issues[64 / BITS_PER_LONG];
};

/*
 * Features that cannot be automatically detected and need matching using the
 * compatible string, typically SoC-specific.
 */
struct panfrost_compatible {
 /* Supplies count and names. */
 int num_supplies;
 const char * const *supply_names;
 /*
 * Number of power domains required, note that values 0 and 1 are
 * handled identically, as only values > 1 need special handling.
 */
 int num_pm_domains;
 /* Only required if num_pm_domains > 1. */
 const char * const *pm_domain_names;

 /* Vendor implementation quirks callback */
 void (*vendor_quirk)(struct panfrost_device *pfdev);

 /* Allowed PM features */
 u8 pm_features;

 /* GPU configuration quirks */
 u8 gpu_quirks;
};

/**
 * struct panfrost_device_debugfs - Device-wide DebugFS tracking structures
 */
struct panfrost_device_debugfs {
 /** @gems_list: Device-wide list of GEM objects owned by at least one file. */
 struct list_head gems_list;

 /** @gems_lock: Serializes access to the device-wide list of GEM objects. */
 struct mutex gems_lock;
};

struct panfrost_device {
 struct device *dev;
 struct drm_device *ddev;
 struct platform_device *pdev;
 int gpu_irq;
 int mmu_irq;

 void __iomem *iomem;
 struct clk *clock;
 struct clk *bus_clock;
 struct regulator_bulk_data *regulators;
 struct reset_control *rstc;
 /* pm_domains for devices with more than one. */
 struct device *pm_domain_devs[MAX_PM_DOMAINS];
 struct device_link *pm_domain_links[MAX_PM_DOMAINS];
 bool coherent;

 struct panfrost_features features;
 const struct panfrost_compatible *comp;
 DECLARE_BITMAP(is_suspended, PANFROST_COMP_BIT_MAX);

 spinlock_t as_lock;
 unsigned long as_in_use_mask;
 unsigned long as_alloc_mask;
 unsigned long as_faulty_mask;
 struct list_head as_lru_list;

 struct panfrost_job_slot *js;

 struct panfrost_job *jobs[NUM_JOB_SLOTS][2];
 struct list_head scheduled_jobs;

 struct panfrost_perfcnt *perfcnt;
 bool profile_mode;

 struct mutex sched_lock;

 struct {
  struct workqueue_struct *wq;
  struct work_struct work;
  atomic_t pending;
 } reset;

 struct mutex shrinker_lock;
 struct list_head shrinker_list;
 struct shrinker *shrinker;

 struct panfrost_devfreq pfdevfreq;

 struct {
  atomic_t use_count;
  spinlock_t lock;
 } cycle_counter;

#ifdef CONFIG_DEBUG_FS
 struct panfrost_device_debugfs debugfs;
#endif
};

struct panfrost_mmu {
 struct panfrost_device *pfdev;
 struct kref refcount;
 struct io_pgtable_cfg pgtbl_cfg;
 struct io_pgtable_ops *pgtbl_ops;
 struct drm_mm mm;
 spinlock_t mm_lock;
 int as;
 atomic_t as_count;
 struct list_head list;
 struct {
  u64 transtab;
  u64 memattr;
  u64 transcfg;
 } cfg;
};

struct panfrost_engine_usage {
 unsigned long long elapsed_ns[NUM_JOB_SLOTS];
 unsigned long long cycles[NUM_JOB_SLOTS];
};

struct panfrost_file_priv {
 struct panfrost_device *pfdev;

 struct drm_sched_entity sched_entity[NUM_JOB_SLOTS];

 struct panfrost_mmu *mmu;

 struct panfrost_engine_usage engine_usage;
};

static inline struct panfrost_device *to_panfrost_device(struct drm_device *ddev)
{
 return ddev->dev_private;
}

static inline int panfrost_model_cmp(struct panfrost_device *pfdev, s32 id)
{
 s32 match_id = pfdev->features.id;

 if (match_id & 0xf000)
  match_id &= 0xf00f;
 return match_id - id;
}

static inline bool panfrost_model_is_bifrost(struct panfrost_device *pfdev)
{
 return panfrost_model_cmp(pfdev, 0x1000) >= 0;
}

static inline bool panfrost_model_eq(struct panfrost_device *pfdev, s32 id)
{
 return !panfrost_model_cmp(pfdev, id);
}

int panfrost_unstable_ioctl_check(void);

int panfrost_device_init(struct panfrost_device *pfdev);
void panfrost_device_fini(struct panfrost_device *pfdev);
void panfrost_device_reset(struct panfrost_device *pfdev);

extern const struct dev_pm_ops panfrost_pm_ops;

enum drm_panfrost_exception_type {
 DRM_PANFROST_EXCEPTION_OK = 0x00,
 DRM_PANFROST_EXCEPTION_DONE = 0x01,
 DRM_PANFROST_EXCEPTION_INTERRUPTED = 0x02,
 DRM_PANFROST_EXCEPTION_STOPPED = 0x03,
 DRM_PANFROST_EXCEPTION_TERMINATED = 0x04,
 DRM_PANFROST_EXCEPTION_KABOOM = 0x05,
 DRM_PANFROST_EXCEPTION_EUREKA = 0x06,
 DRM_PANFROST_EXCEPTION_ACTIVE = 0x08,
 DRM_PANFROST_EXCEPTION_MAX_NON_FAULT = 0x3f,
 DRM_PANFROST_EXCEPTION_JOB_CONFIG_FAULT = 0x40,
 DRM_PANFROST_EXCEPTION_JOB_POWER_FAULT = 0x41,
 DRM_PANFROST_EXCEPTION_JOB_READ_FAULT = 0x42,
 DRM_PANFROST_EXCEPTION_JOB_WRITE_FAULT = 0x43,
 DRM_PANFROST_EXCEPTION_JOB_AFFINITY_FAULT = 0x44,
 DRM_PANFROST_EXCEPTION_JOB_BUS_FAULT = 0x48,
 DRM_PANFROST_EXCEPTION_INSTR_INVALID_PC = 0x50,
 DRM_PANFROST_EXCEPTION_INSTR_INVALID_ENC = 0x51,
 DRM_PANFROST_EXCEPTION_INSTR_TYPE_MISMATCH = 0x52,
 DRM_PANFROST_EXCEPTION_INSTR_OPERAND_FAULT = 0x53,
 DRM_PANFROST_EXCEPTION_INSTR_TLS_FAULT = 0x54,
 DRM_PANFROST_EXCEPTION_INSTR_BARRIER_FAULT = 0x55,
 DRM_PANFROST_EXCEPTION_INSTR_ALIGN_FAULT = 0x56,
 DRM_PANFROST_EXCEPTION_DATA_INVALID_FAULT = 0x58,
 DRM_PANFROST_EXCEPTION_TILE_RANGE_FAULT = 0x59,
 DRM_PANFROST_EXCEPTION_ADDR_RANGE_FAULT = 0x5a,
 DRM_PANFROST_EXCEPTION_IMPRECISE_FAULT = 0x5b,
 DRM_PANFROST_EXCEPTION_OOM = 0x60,
 DRM_PANFROST_EXCEPTION_OOM_AFBC = 0x61,
 DRM_PANFROST_EXCEPTION_UNKNOWN = 0x7f,
 DRM_PANFROST_EXCEPTION_DELAYED_BUS_FAULT = 0x80,
 DRM_PANFROST_EXCEPTION_GPU_SHAREABILITY_FAULT = 0x88,
 DRM_PANFROST_EXCEPTION_SYS_SHAREABILITY_FAULT = 0x89,
 DRM_PANFROST_EXCEPTION_GPU_CACHEABILITY_FAULT = 0x8a,
 DRM_PANFROST_EXCEPTION_TRANSLATION_FAULT_0 = 0xc0,
 DRM_PANFROST_EXCEPTION_TRANSLATION_FAULT_1 = 0xc1,
 DRM_PANFROST_EXCEPTION_TRANSLATION_FAULT_2 = 0xc2,
 DRM_PANFROST_EXCEPTION_TRANSLATION_FAULT_3 = 0xc3,
 DRM_PANFROST_EXCEPTION_TRANSLATION_FAULT_4 = 0xc4,
 DRM_PANFROST_EXCEPTION_TRANSLATION_FAULT_IDENTITY = 0xc7,
 DRM_PANFROST_EXCEPTION_PERM_FAULT_0 = 0xc8,
 DRM_PANFROST_EXCEPTION_PERM_FAULT_1 = 0xc9,
 DRM_PANFROST_EXCEPTION_PERM_FAULT_2 = 0xca,
 DRM_PANFROST_EXCEPTION_PERM_FAULT_3 = 0xcb,
 DRM_PANFROST_EXCEPTION_TRANSTAB_BUS_FAULT_0 = 0xd0,
 DRM_PANFROST_EXCEPTION_TRANSTAB_BUS_FAULT_1 = 0xd1,
 DRM_PANFROST_EXCEPTION_TRANSTAB_BUS_FAULT_2 = 0xd2,
 DRM_PANFROST_EXCEPTION_TRANSTAB_BUS_FAULT_3 = 0xd3,
 DRM_PANFROST_EXCEPTION_ACCESS_FLAG_0 = 0xd8,
 DRM_PANFROST_EXCEPTION_ACCESS_FLAG_1 = 0xd9,
 DRM_PANFROST_EXCEPTION_ACCESS_FLAG_2 = 0xda,
 DRM_PANFROST_EXCEPTION_ACCESS_FLAG_3 = 0xdb,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_IN0 = 0xe0,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_IN1 = 0xe1,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_IN2 = 0xe2,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_IN3 = 0xe3,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_OUT0 = 0xe4,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_OUT1 = 0xe5,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_OUT2 = 0xe6,
 DRM_PANFROST_EXCEPTION_ADDR_SIZE_FAULT_OUT3 = 0xe7,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_FAULT_0 = 0xe8,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_FAULT_1 = 0xe9,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_FAULT_2 = 0xea,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_FAULT_3 = 0xeb,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_NONCACHE_0 = 0xec,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_NONCACHE_1 = 0xed,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_NONCACHE_2 = 0xee,
 DRM_PANFROST_EXCEPTION_MEM_ATTR_NONCACHE_3 = 0xef,
};

static inline bool
panfrost_exception_is_fault(u32 exception_code)
{
 return exception_code > DRM_PANFROST_EXCEPTION_MAX_NON_FAULT;
}

const char *panfrost_exception_name(u32 exception_code);
bool panfrost_exception_needs_reset(const struct panfrost_device *pfdev,
        u32 exception_code);

static inline void
panfrost_device_schedule_reset(struct panfrost_device *pfdev)
{
 atomic_set(&pfdev->reset.pending, 1);
 queue_work(pfdev->reset.wq, &pfdev->reset.work);
}

#endif