1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
new file mode 100644
index 000000000000..a043ac3aae98
--- /dev/null
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2015-2018 Broadcom */
+
+#include <linux/reservation.h>
+#include <drm/drmP.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_gem.h>
+#include <drm/gpu_scheduler.h>
+
+#define GMP_GRANULARITY (128 * 1024)
+
+/* Enum for each of the V3D queues.  We maintain various queue
+ * tracking as an array because at some point we'll want to support
+ * the TFU (texture formatting unit) as another queue.
+ */
+enum v3d_queue {
+	V3D_BIN,
+	V3D_RENDER,
+};
+
+#define V3D_MAX_QUEUES (V3D_RENDER + 1)
+
+struct v3d_queue_state {
+	struct drm_gpu_scheduler sched;
+
+	u64 fence_context;
+	u64 emit_seqno;
+	u64 finished_seqno;
+};
+
+struct v3d_dev {
+	struct drm_device drm;
+
+	/* Short representation (e.g. 33, 41) of the V3D tech version
+	 * and revision.
+	 */
+	int ver;
+
+	struct device *dev;
+	struct platform_device *pdev;
+	void __iomem *hub_regs;
+	void __iomem *core_regs[3];
+	void __iomem *bridge_regs;
+	void __iomem *gca_regs;
+	struct clk *clk;
+
+	/* 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;
+
+	/* 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_exec_info *bin_job;
+	struct v3d_exec_info *render_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;
+
+	/* 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;
+
+	struct {
+		u32 num_allocated;
+		u32 pages_allocated;
+	} bo_stats;
+};
+
+static inline struct v3d_dev *
+to_v3d_dev(struct drm_device *dev)
+{
+	return (struct v3d_dev *)dev->dev_private;
+}
+
+/* The per-fd struct, which tracks the MMU mappings. */
+struct v3d_file_priv {
+	struct v3d_dev *v3d;
+
+	struct drm_sched_entity sched_entity[V3D_MAX_QUEUES];
+};
+
+/* Tracks a mapping of a BO into a per-fd address space */
+struct v3d_vma {
+	struct v3d_page_table *pt;
+	struct list_head list; /* entry in v3d_bo.vmas */
+};
+
+struct v3d_bo {
+	struct drm_gem_object base;
+
+	struct mutex lock;
+
+	struct drm_mm_node node;
+
+	u32 pages_refcount;
+	struct page **pages;
+	struct sg_table *sgt;
+	void *vaddr;
+
+	struct list_head vmas;    /* list of v3d_vma */
+
+	/* List entry for the BO's position in
+	 * v3d_exec_info->unref_list
+	 */
+	struct list_head unref_head;
+
+	/* normally (resv == &_resv) except for imported bo's */
+	struct reservation_object *resv;
+	struct reservation_object _resv;
+};
+
+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 v3d_exec_info *exec;
+
+	/* An optional fence userspace can pass in for the job to depend on. */
+	struct dma_fence *in_fence;
+
+	/* v3d fence to be signaled by IRQ handler when the job is complete. */
+	struct dma_fence *done_fence;
+
+	/* GPU virtual addresses of the start/end of the CL job. */
+	u32 start, end;
+};
+
+struct v3d_exec_info {
+	struct v3d_dev *v3d;
+
+	struct v3d_job bin, render;
+
+	/* Fence for when the scheduler considers the binner to be
+	 * done, for render to depend on.
+	 */
+	struct dma_fence *bin_done_fence;
+
+	struct kref refcount;
+
+	/* This is the array of BOs that were looked up at the start of exec. */
+	struct v3d_bo **bo;
+	u32 bo_count;
+
+	/* List of overflow BOs used in the job that need to be
+	 * released once the job is complete.
+	 */
+	struct list_head unref_list;
+
+	/* Submitted tile memory allocation start/size, tile state. */
+	u32 qma, qms, qts;
+};
+
+/**
+ * _wait_for - magic (register) wait macro
+ *
+ * Does the right thing for modeset paths when run under kdgb or similar atomic
+ * contexts. 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(COND, MS) ({ \
+	unsigned long timeout__ = jiffies + msecs_to_jiffies(MS) + 1;	\
+	int ret__ = 0;							\
+	while (!(COND)) {						\
+		if (time_after(jiffies, timeout__)) {			\
+			if (!(COND))					\
+				ret__ = -ETIMEDOUT;			\
+			break;						\
+		}							\
+		msleep(1);					\
+	}								\
+	ret__;								\
+})
+
+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 */
+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);
+int v3d_gem_fault(struct vm_fault *vmf);
+int v3d_mmap(struct file *filp, struct vm_area_struct *vma);
+struct reservation_object *v3d_prime_res_obj(struct drm_gem_object *obj);
+int v3d_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
+struct sg_table *v3d_prime_get_sg_table(struct drm_gem_object *obj);
+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 */
+int 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_wait_bo_ioctl(struct drm_device *dev, void *data,
+		      struct drm_file *file_priv);
+void v3d_exec_put(struct v3d_exec_info *exec);
+void v3d_reset(struct v3d_dev *v3d);
+void v3d_invalidate_caches(struct v3d_dev *v3d);
+void v3d_flush_caches(struct v3d_dev *v3d);
+
+/* v3d_irq.c */
+void 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);