psp_gfx_rb_frame
struct psp_gfx_rb_frame *write_frame;
struct psp_gfx_rb_frame *ring_buffer_start = ring->ring_mem;
struct psp_gfx_rb_frame *ring_buffer_end = ring_buffer_start +
ring->ring_size / sizeof(struct psp_gfx_rb_frame) - 1;
uint32_t rb_frame_size_dw = sizeof(struct psp_gfx_rb_frame) / 4;
memset(write_frame, 0, sizeof(struct psp_gfx_rb_frame));
struct psp_gfx_rb_frame *ring_mem;