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src/freedreno/drm/freedreno_ringbuffer_sp.h

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+/*
+ * Copyright © 2018 Rob Clark <[email protected]>
+ * SPDX-License-Identifier: MIT
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#ifndef FREEDRENO_RINGBUFFER_SP_H_
+#define FREEDRENO_RINGBUFFER_SP_H_
+
+#include <assert.h>
+#include <inttypes.h>
+#include <pthread.h>
+
+#include "util/hash_table.h"
+#include "util/os_file.h"
+#include "util/slab.h"
+
+#include "freedreno_priv.h"
+#include "freedreno_ringbuffer.h"
+
+/* A "softpin" implementation of submit/ringbuffer, which lowers CPU overhead
+ * by avoiding the additional tracking necessary to build cmds/relocs tables
+ * (but still builds a bos table)
+ */
+
+typedef int (*flush_submit_list_fn)(struct list_head *submit_list);
+
+struct fd_submit_sp {
+   struct fd_submit base;
+
+   DECLARE_ARRAY(struct fd_bo *, bos);
+
+   /* Keep a separate table of sub-alloc BOs.. the backing objects are
+    * tracked in the main bos table (because this is what the kernel
+    * sees), but we need to attach userspace fences to the sub-alloc'd
+    * BOs so the driver knows when they are idle
+    */
+   DECLARE_ARRAY(struct fd_bo *, suballoc_bos);
+
+   /* maps fd_bo to idx in bos table: */
+   struct hash_table *bo_table;
+
+   /* maps fd_bo to idx in suballoc_bos table: */
+   struct hash_table *suballoc_bo_table;
+
+   struct slab_child_pool ring_pool;
+
+   /* Allow for sub-allocation of stateobj ring buffers (ie. sharing
+    * the same underlying bo)..
+    *
+    * We also rely on previous stateobj having been fully constructed
+    * so we can reclaim extra space at it's end.
+    */
+   struct fd_ringbuffer *suballoc_ring;
+
+   /* Flush args, potentially attached to the last submit in the list
+    * of submits to merge:
+    */
+   int in_fence_fd;
+   struct fd_fence *out_fence;
+
+   /* State for enqueued submits:
+    */
+   struct list_head submit_list;   /* includes this submit as last element */
+
+   /* Used by retire_queue, if used by backend: */
+   struct util_queue_fence retire_fence;
+
+   flush_submit_list_fn flush_submit_list;
+
+   uint32_t seqno;
+};
+FD_DEFINE_CAST(fd_submit, fd_submit_sp);
+
+/* for FD_RINGBUFFER_GROWABLE rb's, tracks the 'finalized' cmdstream buffers
+ * and sizes.  Ie. a finalized buffer can have no more commands appended to
+ * it.
+ */
+struct fd_cmd_sp {
+   struct fd_bo *ring_bo;
+   unsigned size;
+};
+
+struct fd_ringbuffer_sp {
+   struct fd_ringbuffer base;
+
+   /* for FD_RINGBUFFER_STREAMING rb's which are sub-allocated */
+   unsigned offset;
+
+   union {
+      /* for _FD_RINGBUFFER_OBJECT case, the array of BOs referenced from
+       * this one
+       */
+      struct {
+         struct fd_pipe *pipe;
+         DECLARE_ARRAY(struct fd_bo *, reloc_bos);
+#ifndef NDEBUG
+         /* BOs to assert are attached to submit: */
+         DECLARE_ARRAY(struct fd_bo *, assert_bos);
+#endif
+
+         /**
+          * The seqno of the last submit we were emitted to.  For stateobjs
+          * it is common to be re-emitted multiple times to the same submit,
+          * we can use this to detect the case.
+          */
+         uint32_t last_submit_seqno;
+      };
+      /* for other cases: */
+      struct {
+         struct fd_submit *submit;
+         DECLARE_ARRAY(struct fd_cmd_sp, cmds);
+      };
+   } u;
+
+   struct fd_bo *ring_bo;
+};
+FD_DEFINE_CAST(fd_ringbuffer, fd_ringbuffer_sp);
+
+void fd_pipe_sp_flush(struct fd_pipe *pipe, uint32_t fence);
+uint32_t fd_submit_append_bo(struct fd_submit_sp *submit, struct fd_bo *bo);
+struct fd_submit *fd_submit_sp_new(struct fd_pipe *pipe,
+                                   flush_submit_list_fn flush_submit_list);
+void fd_pipe_sp_ringpool_init(struct fd_pipe *pipe);
+void fd_pipe_sp_ringpool_fini(struct fd_pipe *pipe);
+struct fd_ringbuffer *fd_ringbuffer_sp_new_object(struct fd_pipe *pipe, uint32_t size);
+
+#endif /* FREEDRENO_RINGBUFFER_SP_H_ */