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/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Copyright 2014 Intel Corporation
* All Rights Reserved.
*
* 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, sub license, 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 <stdio.h>
#include <string.h>
#include <errno.h>
#include "intel_batchbuffer.h"
int intel_batch_reset(struct intel_batchbuffer *batch,
void *p,
uint32_t size,
uint32_t off)
{
batch->err = -EINVAL;
batch->base = batch->base_ptr = p;
batch->state_base = batch->state_ptr = p;
if (off >= size || ALIGN(off, 4) != off)
return -EINVAL;
batch->size = size;
batch->state_base = batch->state_ptr = &batch->base[off];
batch->num_relocs = 0;
batch->err = 0;
return batch->err;
}
uint32_t intel_batch_state_used(struct intel_batchbuffer *batch)
{
return batch->state_ptr - batch->state_base;
}
uint32_t intel_batch_state_offset(struct intel_batchbuffer *batch)
{
return batch->state_ptr - batch->base;
}
void *intel_batch_state_alloc(struct intel_batchbuffer *batch,
uint32_t size,
uint32_t align)
{
uint32_t cur;
uint32_t offset;
if (batch->err)
return NULL;
cur = intel_batch_state_offset(batch);
offset = ALIGN(cur, align);
if (offset + size > batch->size) {
batch->err = -ENOSPC;
return NULL;
}
batch->state_ptr = batch->base + offset + size;
memset(batch->base + cur, 0, size);
return batch->base + offset;
}
int intel_batch_offset(struct intel_batchbuffer *batch, const void *ptr)
{
return (uint8_t *)ptr - batch->base;
}
int intel_batch_state_copy(struct intel_batchbuffer *batch,
const void *ptr,
const uint32_t size,
const uint32_t align)
{
void * const p = intel_batch_state_alloc(batch, size, align);
if (p == NULL)
return -1;
return intel_batch_offset(batch, memcpy(p, ptr, size));
}
uint32_t intel_batch_cmds_used(struct intel_batchbuffer *batch)
{
return batch->base_ptr - batch->base;
}
uint32_t intel_batch_total_used(struct intel_batchbuffer *batch)
{
return batch->state_ptr - batch->base;
}
static uint32_t intel_batch_space(struct intel_batchbuffer *batch)
{
return batch->state_base - batch->base_ptr;
}
int intel_batch_emit_dword(struct intel_batchbuffer *batch, uint32_t dword)
{
uint32_t offset;
if (batch->err)
return -1;
if (intel_batch_space(batch) < 4) {
batch->err = -ENOSPC;
return -1;
}
offset = intel_batch_offset(batch, batch->base_ptr);
*(uint32_t *) (batch->base_ptr) = dword;
batch->base_ptr += 4;
return offset;
}
int intel_batch_emit_reloc(struct intel_batchbuffer *batch,
const uint32_t delta)
{
uint32_t offset;
if (batch->err)
return -1;
if (delta >= batch->size) {
batch->err = -EINVAL;
return -1;
}
offset = intel_batch_emit_dword(batch, delta);
if (batch->err)
return -1;
if (batch->num_relocs >= MAX_RELOCS) {
batch->err = -ENOSPC;
return -1;
}
batch->relocs[batch->num_relocs++] = offset;
return offset;
}
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