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/* -*- c-basic-offset: 4 -*- */
/*
* Copyright © 2006 Intel Corporation
*
* 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:
* Eric Anholt <eric@anholt.net>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <stdlib.h>
#include <errno.h>
#include "xf86.h"
#include "i830.h"
#include "i830_ring.h"
#include "i915_drm.h"
static int
intel_nondrm_exec(dri_bo *bo, unsigned int used, void *priv)
{
ScrnInfoPtr pScrn = priv;
I830Ptr pI830 = I830PTR(pScrn);
BEGIN_LP_RING(2);
OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
OUT_RING(bo->offset);
ADVANCE_LP_RING();
return 0;
}
static int
intel_nondrm_exec_i830(dri_bo *bo, unsigned int used, void *priv)
{
ScrnInfoPtr pScrn = priv;
I830Ptr pI830 = I830PTR(pScrn);
BEGIN_LP_RING(4);
OUT_RING(MI_BATCH_BUFFER);
OUT_RING(bo->offset);
OUT_RING(bo->offset + pI830->batch_used - 4);
OUT_RING(MI_NOOP);
ADVANCE_LP_RING();
return 0;
}
/**
* Creates a fence value representing a request to be passed.
*
* Stub implementation that should be avoided when DRM functions are available.
*/
static unsigned int
intel_nondrm_emit(void *priv)
{
static unsigned int fence = 0;
/* Match DRM in not using half the range. The fake bufmgr relies on this. */
if (++fence >= 0x8000000)
fence = 1;
return fence;
}
/**
* Waits on a fence representing a request to be passed.
*
* Stub implementation that should be avoided when DRM functions are available.
*/
static void
intel_nondrm_wait(unsigned int fence, void *priv)
{
ScrnInfoPtr pScrn = priv;
i830_wait_ring_idle(pScrn);
}
static void
intel_next_batch(ScrnInfoPtr pScrn)
{
I830Ptr pI830 = I830PTR(pScrn);
/* The 865 has issues with larger-than-page-sized batch buffers. */
if (IS_I865G(pI830))
pI830->batch_bo = dri_bo_alloc(pI830->bufmgr, "batch", 4096, 4096);
else
pI830->batch_bo = dri_bo_alloc(pI830->bufmgr, "batch", 4096 * 4, 4096);
dri_bo_map(pI830->batch_bo, 1);
pI830->batch_used = 0;
pI830->batch_ptr = pI830->batch_bo->virtual;
}
void
intel_batch_init(ScrnInfoPtr pScrn)
{
I830Ptr pI830 = I830PTR(pScrn);
pI830->batch_emit_start = 0;
pI830->batch_emitting = 0;
intel_next_batch(pScrn);
if (!pI830->directRenderingEnabled) {
if (IS_I830(pI830) || IS_845G(pI830)) {
intel_bufmgr_fake_set_exec_callback(pI830->bufmgr,
intel_nondrm_exec_i830,
pScrn);
} else {
intel_bufmgr_fake_set_exec_callback(pI830->bufmgr,
intel_nondrm_exec,
pScrn);
}
intel_bufmgr_fake_set_fence_callback(pI830->bufmgr,
intel_nondrm_emit,
intel_nondrm_wait,
pScrn);
}
}
void
intel_batch_teardown(ScrnInfoPtr pScrn)
{
I830Ptr pI830 = I830PTR(pScrn);
if (pI830->batch_ptr != NULL) {
dri_bo_unmap(pI830->batch_bo);
pI830->batch_ptr = NULL;
}
}
void
intel_batch_flush(ScrnInfoPtr pScrn)
{
I830Ptr pI830 = I830PTR(pScrn);
int ret;
if (pI830->batch_used == 0)
return;
/* Emit a padding dword if we aren't going to be quad-word aligned. */
if ((pI830->batch_used & 4) == 0) {
*(uint32_t *)(pI830->batch_ptr + pI830->batch_used) = MI_NOOP;
pI830->batch_used += 4;
}
/* Mark the end of the batchbuffer. */
*(uint32_t *)(pI830->batch_ptr + pI830->batch_used) = MI_BATCH_BUFFER_END;
pI830->batch_used += 4;
dri_bo_unmap(pI830->batch_bo);
pI830->batch_ptr = NULL;
ret = dri_bo_exec(pI830->batch_bo, pI830->batch_used, NULL, 0, 0xffffffff);
if (ret != 0)
FatalError("Failed to submit batchbuffer: %s\n", strerror(-ret));
dri_bo_unreference(pI830->batch_bo);
intel_next_batch(pScrn);
/* Mark that we need to flush whatever potential rendering we've done in the
* blockhandler. We could set this less often, but it's probably not worth
* the work.
*/
pI830->need_mi_flush = TRUE;
}
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