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/*
* Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Rob Clark <robclark@freedesktop.org>
*/
#ifndef FREEDRENO_RINGBUFFER_H_
#define FREEDRENO_RINGBUFFER_H_
#include "util/u_debug.h"
#include "freedreno_drmif.h"
struct fd_submit;
struct fd_ringbuffer;
enum fd_ringbuffer_flags {
/* Primary ringbuffer for a submit, ie. an IB1 level rb
* which kernel must setup RB->IB1 CP_INDIRECT_BRANCH
* packets.
*/
FD_RINGBUFFER_PRIMARY = 0x1,
/* Hint that the stateobj will be used for streaming state
* that is used once or a few times and then discarded.
*
* For sub-allocation, non streaming stateobj's should be
* sub-allocated from a page size buffer, so one long lived
* state obj doesn't prevent other pages from being freed.
* (Ie. it would be no worse than allocating a page sized
* bo for each small non-streaming stateobj).
*
* But streaming stateobj's could be sub-allocated from a
* larger buffer to reduce the alloc/del overhead.
*/
FD_RINGBUFFER_STREAMING = 0x2,
/* Indicates that "growable" cmdstream can be used,
* consisting of multiple physical cmdstream buffers
*/
FD_RINGBUFFER_GROWABLE = 0x4,
/* Internal use only: */
_FD_RINGBUFFER_OBJECT = 0x8,
};
/* A submit object manages/tracks all the state buildup for a "submit"
* ioctl to the kernel. Additionally, with the exception of long-lived
* non-STREAMING stateobj rb's, rb's are allocated from the submit.
*/
struct fd_submit * fd_submit_new(struct fd_pipe *pipe);
/* NOTE: all ringbuffer's create from the submit should be unref'd
* before destroying the submit.
*/
void fd_submit_del(struct fd_submit *submit);
/* Allocate a new rb from the submit. */
struct fd_ringbuffer * fd_submit_new_ringbuffer(struct fd_submit *submit,
uint32_t size, enum fd_ringbuffer_flags flags);
/* in_fence_fd: -1 for no in-fence, else fence fd
* out_fence_fd: NULL for no output-fence requested, else ptr to return out-fence
*/
int fd_submit_flush(struct fd_submit *submit,
int in_fence_fd, int *out_fence_fd,
uint32_t *out_fence);
struct fd_ringbuffer_funcs;
/* the ringbuffer object is not opaque so that OUT_RING() type stuff
* can be inlined. Note that users should not make assumptions about
* the size of this struct.
*/
struct fd_ringbuffer {
uint32_t *cur, *end, *start;
const struct fd_ringbuffer_funcs *funcs;
// size or end coudl probably go away
int size;
int32_t refcnt;
enum fd_ringbuffer_flags flags;
};
/* Allocate a new long-lived state object, not associated with
* a submit:
*/
struct fd_ringbuffer * fd_ringbuffer_new_object(struct fd_pipe *pipe,
uint32_t size);
struct fd_ringbuffer *fd_ringbuffer_ref(struct fd_ringbuffer *ring);
void fd_ringbuffer_del(struct fd_ringbuffer *ring);
void fd_ringbuffer_grow(struct fd_ringbuffer *ring, uint32_t ndwords);
static inline void fd_ringbuffer_emit(struct fd_ringbuffer *ring,
uint32_t data)
{
(*ring->cur++) = data;
}
struct fd_reloc {
struct fd_bo *bo;
#define FD_RELOC_READ 0x0001
#define FD_RELOC_WRITE 0x0002
uint32_t flags;
uint32_t offset;
uint32_t or;
int32_t shift;
uint32_t orhi; /* used for a5xx+ */
};
/* NOTE: relocs are 2 dwords on a5xx+ */
void fd_ringbuffer_reloc(struct fd_ringbuffer *ring, const struct fd_reloc *reloc);
uint32_t fd_ringbuffer_cmd_count(struct fd_ringbuffer *ring);
uint32_t fd_ringbuffer_emit_reloc_ring_full(struct fd_ringbuffer *ring,
struct fd_ringbuffer *target, uint32_t cmd_idx);
static inline uint32_t
offset_bytes(void *end, void *start)
{
return ((char *)end) - ((char *)start);
}
static inline uint32_t
fd_ringbuffer_size(struct fd_ringbuffer *ring)
{
/* only really needed for stateobj ringbuffers, and won't really
* do what you expect for growable rb's.. so lets just restrict
* this to stateobj's for now:
*/
debug_assert(!(ring->flags & FD_RINGBUFFER_GROWABLE));
return offset_bytes(ring->cur, ring->start);
}
#endif /* FREEDRENO_RINGBUFFER_H_ */
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