1/* wld: intel/batch.h
  2 *
  3 * Copyright (c) 2013, 2014 Michael Forney
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining a copy
  6 * of this software and associated documentation files (the "Software"), to deal
  7 * in the Software without restriction, including without limitation the rights
  8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  9 * copies of the Software, and to permit persons to whom the Software is
 10 * furnished to do so, subject to the following conditions:
 11 *
 12 * The above copyright notice and this permission notice shall be included in
 13 * all copies or substantial portions of the Software.
 14 *
 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 21 * SOFTWARE.
 22 */
 23
 24#ifndef WLD_INTEL_BATCH_H
 25#define WLD_INTEL_BATCH_H
 26
 27#include <intel_bufmgr.h>
 28#include <stdarg.h>
 29#include <stdbool.h>
 30#include <stdint.h>
 31
 32#define INTEL_BATCH_MAX_COMMANDS (1 << 13)
 33#define INTEL_BATCH_RESERVED_COMMANDS 2
 34#define INTEL_BATCH_SIZE (INTEL_BATCH_MAX_COMMANDS << 2)
 35
 36enum intel_batch_result {
 37	INTEL_BATCH_SUCCESS,
 38	INTEL_BATCH_NO_SPACE
 39};
 40
 41struct intel_device_info {
 42	int gen;
 43};
 44
 45#define GEN(b, m) ((b)->device_info->gen >= (m))
 46
 47struct intel_batch {
 48	const struct intel_device_info *device_info;
 49	drm_intel_bo *bo;
 50	uint32_t commands[INTEL_BATCH_MAX_COMMANDS];
 51	uint32_t command_count;
 52};
 53
 54bool intel_batch_initialize(struct intel_batch *batch,
 55                            drm_intel_bufmgr *bufmgr);
 56
 57void intel_batch_finalize(struct intel_batch *batch);
 58
 59void intel_batch_flush(struct intel_batch *batch);
 60
 61static inline uint32_t
 62intel_batch_check_space(struct intel_batch *batch,
 63                        uint32_t size)
 64{
 65	return (INTEL_BATCH_MAX_COMMANDS - INTEL_BATCH_RESERVED_COMMANDS
 66	        - batch->command_count)
 67	       >= size;
 68}
 69
 70static inline void
 71intel_batch_ensure_space(struct intel_batch *batch, uint32_t size)
 72{
 73	if (!intel_batch_check_space(batch, size))
 74		intel_batch_flush(batch);
 75}
 76
 77static inline void
 78intel_batch_add_dword(struct intel_batch *batch,
 79                      uint32_t dword)
 80{
 81	batch->commands[batch->command_count++] = dword;
 82}
 83
 84static inline void
 85intel_batch_add_dwords_va(struct intel_batch *batch,
 86                          uint32_t count, va_list dwords)
 87{
 88	while (count--)
 89		intel_batch_add_dword(batch, va_arg(dwords, uint32_t));
 90}
 91
 92static inline void
 93intel_batch_add_dwords(struct intel_batch *batch,
 94                       uint32_t count, ...)
 95{
 96	va_list dwords;
 97	va_start(dwords, count);
 98	intel_batch_add_dwords_va(batch, count, dwords);
 99	va_end(dwords);
100}
101
102static inline uint32_t
103intel_batch_offset(struct intel_batch *batch,
104                   uint32_t command_index)
105{
106	return (batch->command_count + command_index) << 2;
107}
108
109#endif