forked from Minki/linux
45d0dbd15a
With the introduction of the as_lock to serialize address space registers,
the hwaccess_lock is only used within the job code and is not protecting
anything. panfrost_job_hw_submit() only accesses registers for 1 job slot
and it's already serialized by drm_sched.
Fixes: 7282f7645d ("drm/panfrost: Implement per FD address spaces")
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190826223317.28509-9-robh@kernel.org
156 lines
3.3 KiB
C
156 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
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/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
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#ifndef __PANFROST_DEVICE_H__
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#define __PANFROST_DEVICE_H__
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#include <linux/atomic.h>
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#include <linux/io-pgtable.h>
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#include <linux/spinlock.h>
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#include <drm/drm_device.h>
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#include <drm/drm_mm.h>
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#include <drm/gpu_scheduler.h>
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struct panfrost_device;
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struct panfrost_mmu;
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struct panfrost_job_slot;
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struct panfrost_job;
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struct panfrost_perfcnt;
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#define NUM_JOB_SLOTS 3
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struct panfrost_features {
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u16 id;
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u16 revision;
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u64 shader_present;
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u64 tiler_present;
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u64 l2_present;
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u64 stack_present;
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u32 as_present;
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u32 js_present;
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u32 l2_features;
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u32 core_features;
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u32 tiler_features;
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u32 mem_features;
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u32 mmu_features;
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u32 thread_features;
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u32 max_threads;
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u32 thread_max_workgroup_sz;
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u32 thread_max_barrier_sz;
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u32 coherency_features;
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u32 texture_features[4];
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u32 js_features[16];
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u32 nr_core_groups;
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u32 thread_tls_alloc;
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unsigned long hw_features[64 / BITS_PER_LONG];
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unsigned long hw_issues[64 / BITS_PER_LONG];
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};
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struct panfrost_devfreq_slot {
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ktime_t busy_time;
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ktime_t idle_time;
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ktime_t time_last_update;
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bool busy;
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};
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struct panfrost_device {
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struct device *dev;
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struct drm_device *ddev;
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struct platform_device *pdev;
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void __iomem *iomem;
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struct clk *clock;
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struct clk *bus_clock;
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struct regulator *regulator;
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struct reset_control *rstc;
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struct panfrost_features features;
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spinlock_t as_lock;
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unsigned long as_in_use_mask;
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unsigned long as_alloc_mask;
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struct list_head as_lru_list;
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struct panfrost_job_slot *js;
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struct panfrost_job *jobs[NUM_JOB_SLOTS];
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struct list_head scheduled_jobs;
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struct panfrost_perfcnt *perfcnt;
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struct mutex sched_lock;
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struct mutex reset_lock;
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struct mutex shrinker_lock;
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struct list_head shrinker_list;
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struct shrinker shrinker;
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struct {
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struct devfreq *devfreq;
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struct thermal_cooling_device *cooling;
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unsigned long cur_freq;
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unsigned long cur_volt;
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struct panfrost_devfreq_slot slot[NUM_JOB_SLOTS];
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} devfreq;
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};
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struct panfrost_mmu {
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struct io_pgtable_cfg pgtbl_cfg;
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struct io_pgtable_ops *pgtbl_ops;
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int as;
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atomic_t as_count;
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struct list_head list;
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};
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struct panfrost_file_priv {
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struct panfrost_device *pfdev;
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struct drm_sched_entity sched_entity[NUM_JOB_SLOTS];
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struct panfrost_mmu mmu;
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struct drm_mm mm;
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spinlock_t mm_lock;
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};
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static inline struct panfrost_device *to_panfrost_device(struct drm_device *ddev)
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{
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return ddev->dev_private;
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}
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static inline int panfrost_model_cmp(struct panfrost_device *pfdev, s32 id)
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{
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s32 match_id = pfdev->features.id;
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if (match_id & 0xf000)
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match_id &= 0xf00f;
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return match_id - id;
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}
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static inline bool panfrost_model_is_bifrost(struct panfrost_device *pfdev)
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{
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return panfrost_model_cmp(pfdev, 0x1000) >= 0;
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}
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static inline bool panfrost_model_eq(struct panfrost_device *pfdev, s32 id)
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{
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return !panfrost_model_cmp(pfdev, id);
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}
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int panfrost_unstable_ioctl_check(void);
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int panfrost_device_init(struct panfrost_device *pfdev);
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void panfrost_device_fini(struct panfrost_device *pfdev);
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void panfrost_device_reset(struct panfrost_device *pfdev);
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int panfrost_device_resume(struct device *dev);
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int panfrost_device_suspend(struct device *dev);
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const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code);
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#endif
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