LXR linux/drivers/gpu/drm/panfrost/panfrost

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
   3/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
   4
   5#ifndef __PANFROST_DEVICE_H__
   6#define __PANFROST_DEVICE_H__
   7
   8#include <linux/atomic.h>
   9#include <linux/io-pgtable.h>
  10#include <linux/regulator/consumer.h>
  11#include <linux/spinlock.h>
  12#include <drm/drm_device.h>
  13#include <drm/drm_mm.h>
  14#include <drm/gpu_scheduler.h>
  15
  16struct panfrost_device;
  17struct panfrost_mmu;
  18struct panfrost_job_slot;
  19struct panfrost_job;
  20struct panfrost_perfcnt;
  21
  22#define NUM_JOB_SLOTS 3
  23#define MAX_REGULATORS 2
  24#define MAX_PM_DOMAINS 3
  25
  26struct panfrost_features {
  27        u16 id;
  28        u16 revision;
  29
  30        u64 shader_present;
  31        u64 tiler_present;
  32        u64 l2_present;
  33        u64 stack_present;
  34        u32 as_present;
  35        u32 js_present;
  36
  37        u32 l2_features;
  38        u32 core_features;
  39        u32 tiler_features;
  40        u32 mem_features;
  41        u32 mmu_features;
  42        u32 thread_features;
  43        u32 max_threads;
  44        u32 thread_max_workgroup_sz;
  45        u32 thread_max_barrier_sz;
  46        u32 coherency_features;
  47        u32 texture_features[4];
  48        u32 js_features[16];
  49
  50        u32 nr_core_groups;
  51        u32 thread_tls_alloc;
  52
  53        unsigned long hw_features[64 / BITS_PER_LONG];
  54        unsigned long hw_issues[64 / BITS_PER_LONG];
  55};
  56
  57/*
  58 * Features that cannot be automatically detected and need matching using the
  59 * compatible string, typically SoC-specific.
  60 */
  61struct panfrost_compatible {
  62        /* Supplies count and names. */
  63        int num_supplies;
  64        const char * const *supply_names;
  65        /*
  66         * Number of power domains required, note that values 0 and 1 are
  67         * handled identically, as only values > 1 need special handling.
  68         */
  69        int num_pm_domains;
  70        /* Only required if num_pm_domains > 1. */
  71        const char * const *pm_domain_names;
  72};
  73
  74struct panfrost_device {
  75        struct device *dev;
  76        struct drm_device *ddev;
  77        struct platform_device *pdev;
  78
  79        void __iomem *iomem;
  80        struct clk *clock;
  81        struct clk *bus_clock;
  82        struct regulator_bulk_data regulators[MAX_REGULATORS];
  83        struct reset_control *rstc;
  84        /* pm_domains for devices with more than one. */
  85        struct device *pm_domain_devs[MAX_PM_DOMAINS];
  86        struct device_link *pm_domain_links[MAX_PM_DOMAINS];
  87
  88        struct panfrost_features features;
  89        const struct panfrost_compatible *comp;
  90
  91        spinlock_t as_lock;
  92        unsigned long as_in_use_mask;
  93        unsigned long as_alloc_mask;
  94        struct list_head as_lru_list;
  95
  96        struct panfrost_job_slot *js;
  97
  98        struct panfrost_job *jobs[NUM_JOB_SLOTS];
  99        struct list_head scheduled_jobs;
 100
 101        struct panfrost_perfcnt *perfcnt;
 102
 103        struct mutex sched_lock;
 104        struct mutex reset_lock;
 105
 106        struct mutex shrinker_lock;
 107        struct list_head shrinker_list;
 108        struct shrinker shrinker;
 109
 110        struct {
 111                struct devfreq *devfreq;
 112                struct thermal_cooling_device *cooling;
 113                ktime_t busy_time;
 114                ktime_t idle_time;
 115                ktime_t time_last_update;
 116                atomic_t busy_count;
 117        } devfreq;
 118};
 119
 120struct panfrost_mmu {
 121        struct io_pgtable_cfg pgtbl_cfg;
 122        struct io_pgtable_ops *pgtbl_ops;
 123        int as;
 124        atomic_t as_count;
 125        struct list_head list;
 126};
 127
 128struct panfrost_file_priv {
 129        struct panfrost_device *pfdev;
 130
 131        struct drm_sched_entity sched_entity[NUM_JOB_SLOTS];
 132
 133        struct panfrost_mmu mmu;
 134        struct drm_mm mm;
 135        spinlock_t mm_lock;
 136};
 137
 138static inline struct panfrost_device *to_panfrost_device(struct drm_device *ddev)
 139{
 140        return ddev->dev_private;
 141}
 142
 143static inline int panfrost_model_cmp(struct panfrost_device *pfdev, s32 id)
 144{
 145        s32 match_id = pfdev->features.id;
 146
 147        if (match_id & 0xf000)
 148                match_id &= 0xf00f;
 149        return match_id - id;
 150}
 151
 152static inline bool panfrost_model_is_bifrost(struct panfrost_device *pfdev)
 153{
 154        return panfrost_model_cmp(pfdev, 0x1000) >= 0;
 155}
 156
 157static inline bool panfrost_model_eq(struct panfrost_device *pfdev, s32 id)
 158{
 159        return !panfrost_model_cmp(pfdev, id);
 160}
 161
 162int panfrost_unstable_ioctl_check(void);
 163
 164int panfrost_device_init(struct panfrost_device *pfdev);
 165void panfrost_device_fini(struct panfrost_device *pfdev);
 166void panfrost_device_reset(struct panfrost_device *pfdev);
 167
 168int panfrost_device_resume(struct device *dev);
 169int panfrost_device_suspend(struct device *dev);
 170
 171const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code);
 172
 173#endif
 174