xref: /xsrc/external/mit/xf86-video-intel/dist/src/uxa/intel_batchbuffer.h

/**************************************************************************

Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
Copyright © 2002 David Dawes

All Rights Reserved.

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The above copyright notice and this permission notice (including the
next paragraph) shall be included in all copies or substantial portions
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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**************************************************************************/

#ifndef _INTEL_BATCHBUFFER_H
#define _INTEL_BATCHBUFFER_H

#define BATCH_RESERVED		16


void intel_batch_init(ScrnInfoPtr scrn);
void intel_batch_teardown(ScrnInfoPtr scrn);
void intel_batch_emit_flush(ScrnInfoPtr scrn);
void intel_batch_submit(ScrnInfoPtr scrn);

static inline int intel_batch_space(intel_screen_private *intel)
{
	return (intel->batch_bo->size - BATCH_RESERVED) - (4*intel->batch_used);
}

static inline int intel_vertex_space(intel_screen_private *intel)
{
	return intel->vertex_bo ? intel->vertex_bo->size - (4*intel->vertex_used) : 0;
}

static inline void
intel_batch_require_space(ScrnInfoPtr scrn, intel_screen_private *intel, int sz)
{
	assert(sz < intel->batch_bo->size - 8);
	if (intel_batch_space(intel) < sz)
		intel_batch_submit(scrn);
}

static inline void intel_batch_start_atomic(ScrnInfoPtr scrn, int sz)
{
	intel_screen_private *intel = intel_get_screen_private(scrn);

	assert(!intel->in_batch_atomic);

	if (intel->current_batch != RENDER_BATCH) {
		if (intel->current_batch && intel->context_switch)
			intel->context_switch(intel, RENDER_BATCH);
	}

	intel_batch_require_space(scrn, intel, sz * 4);
	intel->current_batch = RENDER_BATCH;

	intel->in_batch_atomic = TRUE;
	intel->batch_atomic_limit = intel->batch_used + sz;
}

static inline void intel_batch_end_atomic(ScrnInfoPtr scrn)
{
	intel_screen_private *intel = intel_get_screen_private(scrn);

	assert(intel->in_batch_atomic);
	assert(intel->batch_used <= intel->batch_atomic_limit);
	intel->in_batch_atomic = FALSE;
}

static inline void intel_batch_emit_dword(intel_screen_private *intel, uint32_t dword)
{
	intel->batch_ptr[intel->batch_used++] = dword;
}

static inline void intel_batch_align(intel_screen_private *intel, uint32_t align)
{
	uint32_t delta;

	align /= 4;
	assert(align);

	if ((delta = intel->batch_used & (align - 1))) {
		delta = align - delta;
		memset (intel->batch_ptr + intel->batch_used, 0, 4*delta);
		intel->batch_used += delta;
	}
}

static inline void
intel_batch_emit_reloc(intel_screen_private *intel,
		       dri_bo * bo,
		       uint32_t read_domains,
		       uint32_t write_domains, uint32_t delta, int needs_fence)
{
	if (needs_fence)
		drm_intel_bo_emit_reloc_fence(intel->batch_bo,
					      intel->batch_used * 4,
					      bo, delta,
					      read_domains, write_domains);
	else
		drm_intel_bo_emit_reloc(intel->batch_bo, intel->batch_used * 4,
					bo, delta,
					read_domains, write_domains);

	intel_batch_emit_dword(intel, bo->offset + delta);
}

static inline void
intel_batch_mark_pixmap_domains(intel_screen_private *intel,
				struct intel_pixmap *priv,
				uint32_t read_domains, uint32_t write_domain)
{
	assert (read_domains);
	assert (write_domain == 0 || write_domain == read_domains);

	if (list_is_empty(&priv->batch))
		list_add(&priv->batch, &intel->batch_pixmaps);

	priv->dirty |= write_domain != 0;
	priv->busy = 1;

	intel->needs_flush |= write_domain != 0;
}

static inline void
intel_batch_emit_reloc_pixmap(intel_screen_private *intel, PixmapPtr pixmap,
			      uint32_t read_domains, uint32_t write_domain,
			      uint32_t delta, int needs_fence)
{
	struct intel_pixmap *priv = intel_get_pixmap_private(pixmap);

	intel_batch_mark_pixmap_domains(intel, priv, read_domains, write_domain);

	intel_batch_emit_reloc(intel, priv->bo,
			       read_domains, write_domain,
			       delta, needs_fence);
}

#define ALIGN_BATCH(align) intel_batch_align(intel, align);
#define OUT_BATCH(dword) intel_batch_emit_dword(intel, dword)

#define OUT_RELOC(bo, read_domains, write_domains, delta) \
	intel_batch_emit_reloc(intel, bo, read_domains, write_domains, delta, 0)

#define OUT_RELOC_FENCED(bo, read_domains, write_domains, delta) \
	intel_batch_emit_reloc(intel, bo, read_domains, write_domains, delta, 1)

#define OUT_RELOC_PIXMAP(pixmap, reads, write, delta)	\
	intel_batch_emit_reloc_pixmap(intel, pixmap, reads, write, delta, 0)

#define OUT_RELOC_PIXMAP_FENCED(pixmap, reads, write, delta)	\
	intel_batch_emit_reloc_pixmap(intel, pixmap, reads, write, delta, 1)

union intfloat {
	float f;
	unsigned int ui;
};

#define OUT_BATCH_F(x) do {			\
	union intfloat tmp;			\
	tmp.f = (float)(x);			\
	OUT_BATCH(tmp.ui);			\
} while(0)

#define __BEGIN_BATCH(n,batch_idx)					\
do {									\
	if (intel->batch_emitting != 0)					\
		FatalError("%s: BEGIN_BATCH called without closing "	\
			   "ADVANCE_BATCH\n", __FUNCTION__);		\
	assert(!intel->in_batch_atomic);				\
	if (intel->current_batch != batch_idx) {			\
		if (intel->current_batch && intel->context_switch)	\
			intel->context_switch(intel, batch_idx);	\
	}								\
	intel_batch_require_space(scrn, intel, (n) * 4);		\
	intel->current_batch = batch_idx;				\
	intel->batch_emitting = (n);					\
	intel->batch_emit_start = intel->batch_used;			\
} while (0)

#define BEGIN_BATCH(n)	__BEGIN_BATCH(n,RENDER_BATCH)
#define BEGIN_BATCH_BLT(n)	__BEGIN_BATCH(n,BLT_BATCH)

#define ADVANCE_BATCH() do {						\
	if (intel->batch_emitting == 0)					\
		FatalError("%s: ADVANCE_BATCH called with no matching "	\
			   "BEGIN_BATCH\n", __FUNCTION__);		\
	if (intel->batch_used >						\
	    intel->batch_emit_start + intel->batch_emitting)		\
		FatalError("%s: ADVANCE_BATCH: exceeded allocation %d/%d\n ", \
			   __FUNCTION__,				\
			   intel->batch_used - intel->batch_emit_start,	\
			   intel->batch_emitting);			\
	if (intel->batch_used < intel->batch_emit_start +		\
	    intel->batch_emitting)					\
		FatalError("%s: ADVANCE_BATCH: under-used allocation %d/%d\n ", \
			   __FUNCTION__,				\
			   intel->batch_used - intel->batch_emit_start,	\
			   intel->batch_emitting);			\
	intel->batch_emitting = 0;					\
} while (0)

void intel_next_vertex(intel_screen_private *intel);
static inline void intel_vertex_emit(intel_screen_private *intel, float v)
{
	intel->vertex_ptr[intel->vertex_used++] = v;
}
#define OUT_VERTEX(v) intel_vertex_emit(intel, v)

#endif /* _INTEL_BATCHBUFFER_H */