cros_gralloc/cros_gralloc_buffer.h

   1 /*
   2  * Copyright 2017 The Chromium OS Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #ifndef CROS_GRALLOC_BUFFER_H
   8 #define CROS_GRALLOC_BUFFER_H
   9
  10 #include "../drv.h"
  11 #include "cros_gralloc_helpers.h"
  12
  13 class cros_gralloc_buffer
  14 {
  15       public:
  16         cros_gralloc_buffer(uint32_t id, struct bo *acquire_bo,
  17                             struct cros_gralloc_handle *acquire_handle, int32_t reserved_region_fd,
  18                             uint64_t reserved_region_size);
  19         ~cros_gralloc_buffer();
  20
  21         uint32_t get_id() const;
  22
  23         /* The new reference count is returned by both these functions. */
  24         int32_t increase_refcount();
  25         int32_t decrease_refcount();
  26
  27         int32_t lock(const struct rectangle *rect, uint32_t map_flags,
  28                      uint8_t *addr[DRV_MAX_PLANES]);
  29         int32_t unlock();
  30         int32_t resource_info(uint32_t strides[DRV_MAX_PLANES], uint32_t offsets[DRV_MAX_PLANES]);
  31
  32         int32_t invalidate();
  33         int32_t flush();
  34
  35         int32_t get_reserved_region(void **reserved_region_addr, uint64_t *reserved_region_size);
  36
  37       private:
  38         cros_gralloc_buffer(cros_gralloc_buffer const &);
  39         cros_gralloc_buffer operator=(cros_gralloc_buffer const &);
  40
  41         uint32_t id_;
  42         struct bo *bo_;
  43
  44         /* Note: this will be nullptr for imported/retained buffers. */
  45         struct cros_gralloc_handle *hnd_;
  46
  47         int32_t refcount_;
  48         int32_t lockcount_;
  49         uint32_t num_planes_;
  50
  51         struct mapping *lock_data_[DRV_MAX_PLANES];
  52
  53         /* Optional additional shared memory region attached to some gralloc4 buffers. */
  54         int32_t reserved_region_fd_;
  55         uint64_t reserved_region_size_;
  56         void *reserved_region_addr_;
  57 };
  58
  59 #endif