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1/* SPDX-License-Identifier: GPL-2.0-only */
2/* Copyright (c) 2016-2017 The Linux Foundation. All rights reserved.
3 */
4#ifndef __A5XX_GPU_H__
5#define __A5XX_GPU_H__
6
7#include "adreno_gpu.h"
8
9/* Bringing over the hack from the previous targets */
10#undef ROP_COPY
11#undef ROP_XOR
12
13#include "a5xx.xml.h"
14
15struct a5xx_gpu {
16 struct adreno_gpu base;
17
18 struct drm_gem_object *pm4_bo;
19 uint64_t pm4_iova;
20
21 struct drm_gem_object *pfp_bo;
22 uint64_t pfp_iova;
23
24 struct drm_gem_object *gpmu_bo;
25 uint64_t gpmu_iova;
26 uint32_t gpmu_dwords;
27
28 uint32_t lm_leakage;
29
30 struct msm_ringbuffer *cur_ring;
31 struct msm_ringbuffer *next_ring;
32
33 struct drm_gem_object *preempt_bo[MSM_GPU_MAX_RINGS];
34 struct drm_gem_object *preempt_counters_bo[MSM_GPU_MAX_RINGS];
35 struct a5xx_preempt_record *preempt[MSM_GPU_MAX_RINGS];
36 uint64_t preempt_iova[MSM_GPU_MAX_RINGS];
37
38 atomic_t preempt_state;
39 struct timer_list preempt_timer;
40
41 struct drm_gem_object *shadow_bo;
42 uint64_t shadow_iova;
43 uint32_t *shadow;
44
45 /* True if the microcode supports the WHERE_AM_I opcode */
46 bool has_whereami;
47};
48
49#define to_a5xx_gpu(x) container_of(x, struct a5xx_gpu, base)
50
51#ifdef CONFIG_DEBUG_FS
52void a5xx_debugfs_init(struct msm_gpu *gpu, struct drm_minor *minor);
53#endif
54
55/*
56 * In order to do lockless preemption we use a simple state machine to progress
57 * through the process.
58 *
59 * PREEMPT_NONE - no preemption in progress. Next state START.
60 * PREEMPT_START - The trigger is evaulating if preemption is possible. Next
61 * states: TRIGGERED, NONE
62 * PREEMPT_ABORT - An intermediate state before moving back to NONE. Next
63 * state: NONE.
64 * PREEMPT_TRIGGERED: A preemption has been executed on the hardware. Next
65 * states: FAULTED, PENDING
66 * PREEMPT_FAULTED: A preemption timed out (never completed). This will trigger
67 * recovery. Next state: N/A
68 * PREEMPT_PENDING: Preemption complete interrupt fired - the callback is
69 * checking the success of the operation. Next state: FAULTED, NONE.
70 */
71
72enum preempt_state {
73 PREEMPT_NONE = 0,
74 PREEMPT_START,
75 PREEMPT_ABORT,
76 PREEMPT_TRIGGERED,
77 PREEMPT_FAULTED,
78 PREEMPT_PENDING,
79};
80
81/*
82 * struct a5xx_preempt_record is a shared buffer between the microcode and the
83 * CPU to store the state for preemption. The record itself is much larger
84 * (64k) but most of that is used by the CP for storage.
85 *
86 * There is a preemption record assigned per ringbuffer. When the CPU triggers a
87 * preemption, it fills out the record with the useful information (wptr, ring
88 * base, etc) and the microcode uses that information to set up the CP following
89 * the preemption. When a ring is switched out, the CP will save the ringbuffer
90 * state back to the record. In this way, once the records are properly set up
91 * the CPU can quickly switch back and forth between ringbuffers by only
92 * updating a few registers (often only the wptr).
93 *
94 * These are the CPU aware registers in the record:
95 * @magic: Must always be 0x27C4BAFC
96 * @info: Type of the record - written 0 by the CPU, updated by the CP
97 * @data: Data field from SET_RENDER_MODE or a checkpoint. Written and used by
98 * the CP
99 * @cntl: Value of RB_CNTL written by CPU, save/restored by CP
100 * @rptr: Value of RB_RPTR written by CPU, save/restored by CP
101 * @wptr: Value of RB_WPTR written by CPU, save/restored by CP
102 * @rptr_addr: Value of RB_RPTR_ADDR written by CPU, save/restored by CP
103 * @rbase: Value of RB_BASE written by CPU, save/restored by CP
104 * @counter: GPU address of the storage area for the performance counters
105 */
106struct a5xx_preempt_record {
107 uint32_t magic;
108 uint32_t info;
109 uint32_t data;
110 uint32_t cntl;
111 uint32_t rptr;
112 uint32_t wptr;
113 uint64_t rptr_addr;
114 uint64_t rbase;
115 uint64_t counter;
116};
117
118/* Magic identifier for the preemption record */
119#define A5XX_PREEMPT_RECORD_MAGIC 0x27C4BAFCUL
120
121/*
122 * Even though the structure above is only a few bytes, we need a full 64k to
123 * store the entire preemption record from the CP
124 */
125#define A5XX_PREEMPT_RECORD_SIZE (64 * 1024)
126
127/*
128 * The preemption counter block is a storage area for the value of the
129 * preemption counters that are saved immediately before context switch. We
130 * append it on to the end of the allocation for the preemption record.
131 */
132#define A5XX_PREEMPT_COUNTER_SIZE (16 * 4)
133
134
135int a5xx_power_init(struct msm_gpu *gpu);
136void a5xx_gpmu_ucode_init(struct msm_gpu *gpu);
137
138static inline int spin_usecs(struct msm_gpu *gpu, uint32_t usecs,
139 uint32_t reg, uint32_t mask, uint32_t value)
140{
141 while (usecs--) {
142 udelay(1);
143 if ((gpu_read(gpu, reg) & mask) == value)
144 return 0;
145 cpu_relax();
146 }
147
148 return -ETIMEDOUT;
149}
150
151#define shadowptr(a5xx_gpu, ring) ((a5xx_gpu)->shadow_iova + \
152 ((ring)->id * sizeof(uint32_t)))
153
154bool a5xx_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
155void a5xx_set_hwcg(struct msm_gpu *gpu, bool state);
156
157void a5xx_preempt_init(struct msm_gpu *gpu);
158void a5xx_preempt_hw_init(struct msm_gpu *gpu);
159void a5xx_preempt_trigger(struct msm_gpu *gpu);
160void a5xx_preempt_irq(struct msm_gpu *gpu);
161void a5xx_preempt_fini(struct msm_gpu *gpu);
162
163void a5xx_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring, bool sync);
164
165/* Return true if we are in a preempt state */
166static inline bool a5xx_in_preempt(struct a5xx_gpu *a5xx_gpu)
167{
168 int preempt_state = atomic_read(&a5xx_gpu->preempt_state);
169
170 return !(preempt_state == PREEMPT_NONE ||
171 preempt_state == PREEMPT_ABORT);
172}
173
174#endif /* __A5XX_GPU_H__ */