/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2016-2017 The Linux Foundation. All rights reserved.
*/
#ifndef __A5XX_GPU_H__
#define __A5XX_GPU_H__
#include "adreno_gpu.h"
/* Bringing over the hack from the previous targets */
#undef ROP_COPY
#undef ROP_XOR
#include "a5xx.xml.h"
struct a5xx_gpu {
struct adreno_gpu base;
struct drm_gem_object *pm4_bo;
uint64_t pm4_iova;
struct drm_gem_object *pfp_bo;
uint64_t pfp_iova;
struct drm_gem_object *gpmu_bo;
uint64_t gpmu_iova;
uint32_t gpmu_dwords;
uint32_t lm_leakage;
struct msm_ringbuffer *cur_ring;
struct msm_ringbuffer *next_ring;
struct drm_gem_object *preempt_bo[MSM_GPU_MAX_RINGS];
struct drm_gem_object *preempt_counters_bo[MSM_GPU_MAX_RINGS];
struct a5xx_preempt_record *preempt[MSM_GPU_MAX_RINGS];
uint64_t preempt_iova[MSM_GPU_MAX_RINGS];
uint32_t last_seqno[MSM_GPU_MAX_RINGS];
atomic_t preempt_state;
spinlock_t preempt_start_lock;
struct timer_list preempt_timer;
struct drm_gem_object *shadow_bo;
uint64_t shadow_iova;
uint32_t *shadow;
/* True if the microcode supports the WHERE_AM_I opcode */
bool has_whereami;
};
#define to_a5xx_gpu(x) container_of(x, struct a5xx_gpu, base)
#ifdef CONFIG_DEBUG_FS
void a5xx_debugfs_init(struct msm_gpu *gpu, struct drm_minor *minor);
#endif
/*
* In order to do lockless preemption we use a simple state machine to progress
* through the process .
*
* PREEMPT_NONE - no preemption in progress . Next state START .
* PREEMPT_START - The trigger is evaulating if preemption is possible . Next
* states : TRIGGERED , NONE
* PREEMPT_ABORT - An intermediate state before moving back to NONE . Next
* state : NONE .
* PREEMPT_TRIGGERED : A preemption has been executed on the hardware . Next
* states : FAULTED , PENDING
* PREEMPT_FAULTED : A preemption timed out ( never completed ) . This will trigger
* recovery . Next state : N / A
* PREEMPT_PENDING : Preemption complete interrupt fired - the callback is
* checking the success of the operation . Next state : FAULTED , NONE .
*/
enum preempt_state {
PREEMPT_NONE = 0 ,
PREEMPT_START,
PREEMPT_ABORT,
PREEMPT_TRIGGERED,
PREEMPT_FAULTED,
PREEMPT_PENDING,
};
/*
* struct a5xx_preempt_record is a shared buffer between the microcode and the
* CPU to store the state for preemption . The record itself is much larger
* ( 64 k ) but most of that is used by the CP for storage .
*
* There is a preemption record assigned per ringbuffer . When the CPU triggers a
* preemption , it fills out the record with the useful information ( wptr , ring
* base , etc ) and the microcode uses that information to set up the CP following
* the preemption . When a ring is switched out , the CP will save the ringbuffer
* state back to the record . In this way , once the records are properly set up
* the CPU can quickly switch back and forth between ringbuffers by only
* updating a few registers ( often only the wptr ) .
*
* These are the CPU aware registers in the record :
* @ magic : Must always be 0 x27C4BAFC
* @ info : Type of the record - written 0 by the CPU , updated by the CP
* @ data : Data field from SET_RENDER_MODE or a checkpoint . Written and used by
* the CP
* @ cntl : Value of RB_CNTL written by CPU , save / restored by CP
* @ rptr : Value of RB_RPTR written by CPU , save / restored by CP
* @ wptr : Value of RB_WPTR written by CPU , save / restored by CP
* @ rptr_addr : Value of RB_RPTR_ADDR written by CPU , save / restored by CP
* @ rbase : Value of RB_BASE written by CPU , save / restored by CP
* @ counter : GPU address of the storage area for the performance counters
*/
struct a5xx_preempt_record {
uint32_t magic;
uint32_t info;
uint32_t data;
uint32_t cntl;
uint32_t rptr;
uint32_t wptr;
uint64_t rptr_addr;
uint64_t rbase;
uint64_t counter;
};
/* Magic identifier for the preemption record */
#define A5XX_PREEMPT_RECORD_MAGIC 0 x27C4BAFCUL
/*
* Even though the structure above is only a few bytes , we need a full 64 k to
* store the entire preemption record from the CP
*/
#define A5XX_PREEMPT_RECORD_SIZE (64 * 1024 )
/*
* The preemption counter block is a storage area for the value of the
* preemption counters that are saved immediately before context switch . We
* append it on to the end of the allocation for the preemption record .
*/
#define A5XX_PREEMPT_COUNTER_SIZE (16 * 4 )
int a5xx_power_init(struct msm_gpu *gpu);
void a5xx_gpmu_ucode_init(struct msm_gpu *gpu);
static inline int spin_usecs(struct msm_gpu *gpu, uint32_t usecs,
uint32_t reg, uint32_t mask, uint32_t value)
{
while (usecs--) {
udelay(1 );
if ((gpu_read(gpu, reg) & mask) == value)
return 0 ;
cpu_relax();
}
return -ETIMEDOUT;
}
#define shadowptr(a5xx_gpu, ring) ((a5xx_gpu)->shadow_iova + \
((ring)->id * sizeof (uint32_t)))
bool a5xx_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring);
void a5xx_set_hwcg(struct msm_gpu *gpu, bool state);
void a5xx_preempt_init(struct msm_gpu *gpu);
void a5xx_preempt_hw_init(struct msm_gpu *gpu);
void a5xx_preempt_trigger(struct msm_gpu *gpu);
void a5xx_preempt_irq(struct msm_gpu *gpu);
void a5xx_preempt_fini(struct msm_gpu *gpu);
void a5xx_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring, bool sync);
/* Return true if we are in a preempt state */
static inline bool a5xx_in_preempt(struct a5xx_gpu *a5xx_gpu)
{
int preempt_state = atomic_read(&a5xx_gpu->preempt_state);
return !(preempt_state == PREEMPT_NONE ||
preempt_state == PREEMPT_ABORT);
}
#endif /* __A5XX_GPU_H__ */
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(vorverarbeitet am 2026-10-04)
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