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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7282f7645d
Up until now, a single shared GPU address space was used. This is not ideal as there's no protection between processes and doesn't work for supporting the same GPU/CPU VA feature. Most importantly, this will hopefully mitigate Alyssa's fear of WebGL, whatever that is. Most of the changes here are moving struct drm_mm and struct panfrost_mmu objects from the per device struct to the per FD struct. The critical function is panfrost_mmu_as_get() which handles allocating and switching the h/w address spaces. There's 3 states an AS can be in: free, allocated, and in use. When a job runs, it requests an address space and then marks it not in use when job is complete(but stays assigned). The first time thru, we find a free AS in the alloc_mask and assign the AS to the FD. Then the next time thru, we most likely already have our AS and we just mark it in use with a ref count. We need a ref count because we have multiple job slots. If the job/FD doesn't have an AS assigned and there are no free ones, then we pick an allocated one not in use from our LRU list and switch the AS from the old FD to the new one. Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Steven Price <steven.price@arm.com> 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/20190813150115.30338-1-robh@kernel.org
159 lines
3.4 KiB
C
159 lines
3.4 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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spinlock_t hwaccess_lock;
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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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struct mutex lock;
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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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