| // SPDX-License-Identifier: GPL-2.0+ |
| /* Copyright (C) 2015-2018 Broadcom */ |
| |
| #include <linux/delay.h> |
| #include <linux/mutex.h> |
| #include <linux/spinlock_types.h> |
| #include <linux/workqueue.h> |
| |
| #include <drm/drm_encoder.h> |
| #include <drm/drm_gem.h> |
| #include <drm/drm_gem_shmem_helper.h> |
| #include <drm/gpu_scheduler.h> |
| |
| #include "uapi/drm/v3d_drm.h" |
| |
| struct clk; |
| struct platform_device; |
| struct reset_control; |
| |
| #define GMP_GRANULARITY (128 * 1024) |
| |
| /* Enum for each of the V3D queues. */ |
| enum v3d_queue { |
| V3D_BIN, |
| V3D_RENDER, |
| V3D_TFU, |
| V3D_CSD, |
| V3D_CACHE_CLEAN, |
| }; |
| |
| #define V3D_MAX_QUEUES (V3D_CACHE_CLEAN + 1) |
| |
| struct v3d_queue_state { |
| struct drm_gpu_scheduler sched; |
| |
| u64 fence_context; |
| u64 emit_seqno; |
| }; |
| |
| /* Performance monitor object. The perform lifetime is controlled by userspace |
| * using perfmon related ioctls. A perfmon can be attached to a submit_cl |
| * request, and when this is the case, HW perf counters will be activated just |
| * before the submit_cl is submitted to the GPU and disabled when the job is |
| * done. This way, only events related to a specific job will be counted. |
| */ |
| struct v3d_perfmon { |
| /* Tracks the number of users of the perfmon, when this counter reaches |
| * zero the perfmon is destroyed. |
| */ |
| refcount_t refcnt; |
| |
| /* Protects perfmon stop, as it can be invoked from multiple places. */ |
| struct mutex lock; |
| |
| /* Number of counters activated in this perfmon instance |
| * (should be less than DRM_V3D_MAX_PERF_COUNTERS). |
| */ |
| u8 ncounters; |
| |
| /* Events counted by the HW perf counters. */ |
| u8 counters[DRM_V3D_MAX_PERF_COUNTERS]; |
| |
| /* Storage for counter values. Counters are incremented by the |
| * HW perf counter values every time the perfmon is attached |
| * to a GPU job. This way, perfmon users don't have to |
| * retrieve the results after each job if they want to track |
| * events covering several submissions. Note that counter |
| * values can't be reset, but you can fake a reset by |
| * destroying the perfmon and creating a new one. |
| */ |
| u64 values[]; |
| }; |
| |
| struct v3d_dev { |
| struct drm_device drm; |
| |
| /* Short representation (e.g. 33, 41) of the V3D tech version |
| * and revision. |
| */ |
| int ver; |
| bool single_irq_line; |
| |
| void __iomem *hub_regs; |
| void __iomem *core_regs[3]; |
| void __iomem *bridge_regs; |
| void __iomem *gca_regs; |
| struct clk *clk; |
| struct reset_control *reset; |
| |
| /* Virtual and DMA addresses of the single shared page table. */ |
| volatile u32 *pt; |
| dma_addr_t pt_paddr; |
| |
| /* Virtual and DMA addresses of the MMU's scratch page. When |
| * a read or write is invalid in the MMU, it will be |
| * redirected here. |
| */ |
| void *mmu_scratch; |
| dma_addr_t mmu_scratch_paddr; |
| /* virtual address bits from V3D to the MMU. */ |
| int va_width; |
| |
| /* Number of V3D cores. */ |
| u32 cores; |
| |
| /* Allocator managing the address space. All units are in |
| * number of pages. |
| */ |
| struct drm_mm mm; |
| spinlock_t mm_lock; |
| |
| struct work_struct overflow_mem_work; |
| |
| struct v3d_bin_job *bin_job; |
| struct v3d_render_job *render_job; |
| struct v3d_tfu_job *tfu_job; |
| struct v3d_csd_job *csd_job; |
| |
| struct v3d_queue_state queue[V3D_MAX_QUEUES]; |
| |
| /* Spinlock used to synchronize the overflow memory |
| * management against bin job submission. |
| */ |
| spinlock_t job_lock; |
| |
| /* Used to track the active perfmon if any. */ |
| struct v3d_perfmon *active_perfmon; |
| |
| /* Protects bo_stats */ |
| struct mutex bo_lock; |
| |
| /* Lock taken when resetting the GPU, to keep multiple |
| * processes from trying to park the scheduler threads and |
| * reset at once. |
| */ |
| struct mutex reset_lock; |
| |
| /* Lock taken when creating and pushing the GPU scheduler |
| * jobs, to keep the sched-fence seqnos in order. |
| */ |
| struct mutex sched_lock; |
| |
| /* Lock taken during a cache clean and when initiating an L2 |
| * flush, to keep L2 flushes from interfering with the |
| * synchronous L2 cleans. |
| */ |
| struct mutex cache_clean_lock; |
| |
| struct { |
| u32 num_allocated; |
| u32 pages_allocated; |
| } bo_stats; |
| }; |
| |
| static inline struct v3d_dev * |
| to_v3d_dev(struct drm_device *dev) |
| { |
| return container_of(dev, struct v3d_dev, drm); |
| } |
| |
| static inline bool |
| v3d_has_csd(struct v3d_dev *v3d) |
| { |
| return v3d->ver >= 41; |
| } |
| |
| #define v3d_to_pdev(v3d) to_platform_device((v3d)->drm.dev) |
| |
| /* The per-fd struct, which tracks the MMU mappings. */ |
| struct v3d_file_priv { |
| struct v3d_dev *v3d; |
| |
| struct { |
| struct idr idr; |
| struct mutex lock; |
| } perfmon; |
| |
| struct drm_sched_entity sched_entity[V3D_MAX_QUEUES]; |
| }; |
| |
| struct v3d_bo { |
| struct drm_gem_shmem_object base; |
| |
| struct drm_mm_node node; |
| |
| /* List entry for the BO's position in |
| * v3d_render_job->unref_list |
| */ |
| struct list_head unref_head; |
| }; |
| |
| static inline struct v3d_bo * |
| to_v3d_bo(struct drm_gem_object *bo) |
| { |
| return (struct v3d_bo *)bo; |
| } |
| |
| struct v3d_fence { |
| struct dma_fence base; |
| struct drm_device *dev; |
| /* v3d seqno for signaled() test */ |
| u64 seqno; |
| enum v3d_queue queue; |
| }; |
| |
| static inline struct v3d_fence * |
| to_v3d_fence(struct dma_fence *fence) |
| { |
| return (struct v3d_fence *)fence; |
| } |
| |
| #define V3D_READ(offset) readl(v3d->hub_regs + offset) |
| #define V3D_WRITE(offset, val) writel(val, v3d->hub_regs + offset) |
| |
| #define V3D_BRIDGE_READ(offset) readl(v3d->bridge_regs + offset) |
| #define V3D_BRIDGE_WRITE(offset, val) writel(val, v3d->bridge_regs + offset) |
| |
| #define V3D_GCA_READ(offset) readl(v3d->gca_regs + offset) |
| #define V3D_GCA_WRITE(offset, val) writel(val, v3d->gca_regs + offset) |
| |
| #define V3D_CORE_READ(core, offset) readl(v3d->core_regs[core] + offset) |
| #define V3D_CORE_WRITE(core, offset, val) writel(val, v3d->core_regs[core] + offset) |
| |
| struct v3d_job { |
| struct drm_sched_job base; |
| |
| struct kref refcount; |
| |
| struct v3d_dev *v3d; |
| |
| /* This is the array of BOs that were looked up at the start |
| * of submission. |
| */ |
| struct drm_gem_object **bo; |
| u32 bo_count; |
| |
| /* Array of struct dma_fence * to block on before submitting this job. |
| */ |
| struct xarray deps; |
| unsigned long last_dep; |
| |
| /* v3d fence to be signaled by IRQ handler when the job is complete. */ |
| struct dma_fence *irq_fence; |
| |
| /* scheduler fence for when the job is considered complete and |
| * the BO reservations can be released. |
| */ |
| struct dma_fence *done_fence; |
| |
| /* Pointer to a performance monitor object if the user requested it, |
| * NULL otherwise. |
| */ |
| struct v3d_perfmon *perfmon; |
| |
| /* Callback for the freeing of the job on refcount going to 0. */ |
| void (*free)(struct kref *ref); |
| }; |
| |
| struct v3d_bin_job { |
| struct v3d_job base; |
| |
| /* GPU virtual addresses of the start/end of the CL job. */ |
| u32 start, end; |
| |
| u32 timedout_ctca, timedout_ctra; |
| |
| /* Corresponding render job, for attaching our overflow memory. */ |
| struct v3d_render_job *render; |
| |
| /* Submitted tile memory allocation start/size, tile state. */ |
| u32 qma, qms, qts; |
| }; |
| |
| struct v3d_render_job { |
| struct v3d_job base; |
| |
| /* GPU virtual addresses of the start/end of the CL job. */ |
| u32 start, end; |
| |
| u32 timedout_ctca, timedout_ctra; |
| |
| /* List of overflow BOs used in the job that need to be |
| * released once the job is complete. |
| */ |
| struct list_head unref_list; |
| }; |
| |
| struct v3d_tfu_job { |
| struct v3d_job base; |
| |
| struct drm_v3d_submit_tfu args; |
| }; |
| |
| struct v3d_csd_job { |
| struct v3d_job base; |
| |
| u32 timedout_batches; |
| |
| struct drm_v3d_submit_csd args; |
| }; |
| |
| /** |
| * __wait_for - magic wait macro |
| * |
| * Macro to help avoid open coding check/wait/timeout patterns. Note that it's |
| * important that we check the condition again after having timed out, since the |
| * timeout could be due to preemption or similar and we've never had a chance to |
| * check the condition before the timeout. |
| */ |
| #define __wait_for(OP, COND, US, Wmin, Wmax) ({ \ |
| const ktime_t end__ = ktime_add_ns(ktime_get_raw(), 1000ll * (US)); \ |
| long wait__ = (Wmin); /* recommended min for usleep is 10 us */ \ |
| int ret__; \ |
| might_sleep(); \ |
| for (;;) { \ |
| const bool expired__ = ktime_after(ktime_get_raw(), end__); \ |
| OP; \ |
| /* Guarantee COND check prior to timeout */ \ |
| barrier(); \ |
| if (COND) { \ |
| ret__ = 0; \ |
| break; \ |
| } \ |
| if (expired__) { \ |
| ret__ = -ETIMEDOUT; \ |
| break; \ |
| } \ |
| usleep_range(wait__, wait__ * 2); \ |
| if (wait__ < (Wmax)) \ |
| wait__ <<= 1; \ |
| } \ |
| ret__; \ |
| }) |
| |
| #define _wait_for(COND, US, Wmin, Wmax) __wait_for(, (COND), (US), (Wmin), \ |
| (Wmax)) |
| #define wait_for(COND, MS) _wait_for((COND), (MS) * 1000, 10, 1000) |
| |
| static inline unsigned long nsecs_to_jiffies_timeout(const u64 n) |
| { |
| /* nsecs_to_jiffies64() does not guard against overflow */ |
| if (NSEC_PER_SEC % HZ && |
| div_u64(n, NSEC_PER_SEC) >= MAX_JIFFY_OFFSET / HZ) |
| return MAX_JIFFY_OFFSET; |
| |
| return min_t(u64, MAX_JIFFY_OFFSET, nsecs_to_jiffies64(n) + 1); |
| } |
| |
| /* v3d_bo.c */ |
| struct drm_gem_object *v3d_create_object(struct drm_device *dev, size_t size); |
| void v3d_free_object(struct drm_gem_object *gem_obj); |
| struct v3d_bo *v3d_bo_create(struct drm_device *dev, struct drm_file *file_priv, |
| size_t size); |
| int v3d_create_bo_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| int v3d_mmap_bo_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| int v3d_get_bo_offset_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| struct drm_gem_object *v3d_prime_import_sg_table(struct drm_device *dev, |
| struct dma_buf_attachment *attach, |
| struct sg_table *sgt); |
| |
| /* v3d_debugfs.c */ |
| void v3d_debugfs_init(struct drm_minor *minor); |
| |
| /* v3d_fence.c */ |
| extern const struct dma_fence_ops v3d_fence_ops; |
| struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue queue); |
| |
| /* v3d_gem.c */ |
| int v3d_gem_init(struct drm_device *dev); |
| void v3d_gem_destroy(struct drm_device *dev); |
| int v3d_submit_cl_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| int v3d_submit_tfu_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| int v3d_submit_csd_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| int v3d_wait_bo_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| void v3d_job_put(struct v3d_job *job); |
| void v3d_reset(struct v3d_dev *v3d); |
| void v3d_invalidate_caches(struct v3d_dev *v3d); |
| void v3d_clean_caches(struct v3d_dev *v3d); |
| |
| /* v3d_irq.c */ |
| int v3d_irq_init(struct v3d_dev *v3d); |
| void v3d_irq_enable(struct v3d_dev *v3d); |
| void v3d_irq_disable(struct v3d_dev *v3d); |
| void v3d_irq_reset(struct v3d_dev *v3d); |
| |
| /* v3d_mmu.c */ |
| int v3d_mmu_get_offset(struct drm_file *file_priv, struct v3d_bo *bo, |
| u32 *offset); |
| int v3d_mmu_set_page_table(struct v3d_dev *v3d); |
| void v3d_mmu_insert_ptes(struct v3d_bo *bo); |
| void v3d_mmu_remove_ptes(struct v3d_bo *bo); |
| |
| /* v3d_sched.c */ |
| int v3d_sched_init(struct v3d_dev *v3d); |
| void v3d_sched_fini(struct v3d_dev *v3d); |
| |
| /* v3d_perfmon.c */ |
| void v3d_perfmon_get(struct v3d_perfmon *perfmon); |
| void v3d_perfmon_put(struct v3d_perfmon *perfmon); |
| void v3d_perfmon_start(struct v3d_dev *v3d, struct v3d_perfmon *perfmon); |
| void v3d_perfmon_stop(struct v3d_dev *v3d, struct v3d_perfmon *perfmon, |
| bool capture); |
| struct v3d_perfmon *v3d_perfmon_find(struct v3d_file_priv *v3d_priv, int id); |
| void v3d_perfmon_open_file(struct v3d_file_priv *v3d_priv); |
| void v3d_perfmon_close_file(struct v3d_file_priv *v3d_priv); |
| int v3d_perfmon_create_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| int v3d_perfmon_destroy_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |
| int v3d_perfmon_get_values_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv); |