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/* wld: intel/batch.c
 *
 * Copyright (c) 2013, 2014 Michael Forney
 *
 * 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 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.
 */

#include "batch.h"
#include "mi.h"

#include <i915_drm.h>
#include <stdlib.h>

static const struct intel_device_info device_info_i965 = {.gen = 4};
static const struct intel_device_info device_info_g4x = {.gen = 4};
static const struct intel_device_info device_info_ilk = {.gen = 5};
static const struct intel_device_info device_info_snb_gt1 = {.gen = 6};
static const struct intel_device_info device_info_snb_gt2 = {.gen = 6};
static const struct intel_device_info device_info_ivb_gt1 = {.gen = 7};
static const struct intel_device_info device_info_ivb_gt2 = {.gen = 7};
static const struct intel_device_info device_info_byt = {.gen = 7};
static const struct intel_device_info device_info_hsw_gt1 = {.gen = 7};
static const struct intel_device_info device_info_hsw_gt2 = {.gen = 7};
static const struct intel_device_info device_info_hsw_gt3 = {.gen = 7};

static const struct intel_device_info *device_info(int device_id) {
  switch (device_id) {
#define CHIPSET(device_id, type, name)                                         \
  case device_id:                                                              \
    return &device_info_##type;
#include "i965_pci_ids.h"
#undef CHIPSET
  default:
    return NULL;
  }
}

bool intel_batch_initialize(struct intel_batch *batch,
                            drm_intel_bufmgr *bufmgr) {
  int device_id = drm_intel_bufmgr_gem_get_devid(bufmgr);

  batch->command_count = 0;
  batch->device_info = device_info(device_id);

  if (!batch->device_info)
    return false;

  /* Alignment argument (4096) is not used */
  batch->bo =
      drm_intel_bo_alloc(bufmgr, "batchbuffer", sizeof batch->commands, 4096);

  if (!batch->bo)
    return false;

  return true;
}

void intel_batch_finalize(struct intel_batch *batch) {
  drm_intel_bo_unreference(batch->bo);
}

void intel_batch_flush(struct intel_batch *batch) {
  if (batch->command_count == 0)
    return;

  intel_batch_add_dword(batch, MI_BATCH_BUFFER_END);

  /* Pad the batch buffer to the next quad-word. */
  if (batch->command_count & 1)
    intel_batch_add_dword(batch, MI_NOOP);

  drm_intel_bo_subdata(batch->bo, 0, batch->command_count << 2,
                       batch->commands);
  drm_intel_bo_mrb_exec(batch->bo, batch->command_count << 2, NULL, 0, 0,
                        batch->device_info->gen >= 6 ? I915_EXEC_BLT
                                                     : I915_EXEC_DEFAULT);
  drm_intel_gem_bo_clear_relocs(batch->bo, 0);
  batch->command_count = 0;
}