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