diff options
Diffstat (limited to 'lib/intel_batchbuffer.c')
-rw-r--r-- | lib/intel_batchbuffer.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/lib/intel_batchbuffer.c b/lib/intel_batchbuffer.c new file mode 100644 index 00000000..1e3148ab --- /dev/null +++ b/lib/intel_batchbuffer.c @@ -0,0 +1,139 @@ +/************************************************************************** + * + * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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 <inttypes.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <assert.h> +#include "drm.h" +#include "intel_batchbuffer.h" +#include "intel_bufmgr.h" + +void +intel_batchbuffer_reset(struct intel_batchbuffer *batch) +{ + if (batch->bo != NULL) { + drm_intel_bo_unreference(batch->bo); + batch->bo = NULL; + } + + if (!batch->buffer) + batch->buffer = malloc(BATCH_SZ); + + batch->bo = drm_intel_bo_alloc(batch->bufmgr, "batchbuffer", + BATCH_SZ, 4096); + + batch->map = batch->buffer; + batch->size = BATCH_SZ; + batch->ptr = batch->map; +} + +struct intel_batchbuffer * +intel_batchbuffer_alloc(drm_intel_bufmgr *bufmgr) +{ + struct intel_batchbuffer *batch = calloc(sizeof(*batch), 1); + + batch->bufmgr = bufmgr; + intel_batchbuffer_reset(batch); + + return batch; +} + +void +intel_batchbuffer_free(struct intel_batchbuffer *batch) +{ + free (batch->buffer); + + drm_intel_bo_unreference(batch->bo); + batch->bo = NULL; + free(batch); +} + +void +intel_batchbuffer_flush(struct intel_batchbuffer *batch) +{ + unsigned int used = batch->ptr - batch->map; + int ret; + + if (used == 0) + return; + + /* Round batchbuffer usage to 2 DWORDs. */ + if ((used & 4) == 0) { + *(uint32_t *) (batch->ptr) = 0; /* noop */ + batch->ptr += 4; + used = batch->ptr - batch->map; + } + + /* Mark the end of the buffer. */ + *(uint32_t *) (batch->ptr) = MI_BATCH_BUFFER_END; /* noop */ + batch->ptr += 4; + used = batch->ptr - batch->map; + + drm_intel_bo_subdata(batch->bo, 0, used, batch->buffer); + + batch->map = NULL; + batch->ptr = NULL; + + ret = drm_intel_bo_exec(batch->bo, used, NULL, 0, 0); + assert(ret == 0); + + intel_batchbuffer_reset(batch); +} + + +/* This is the only way buffers get added to the validate list. + */ +void +intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch, + drm_intel_bo *buffer, uint32_t delta, + uint32_t read_domains, uint32_t write_domain) +{ + int ret; + + if (batch->ptr - batch->map > batch->bo->size) + printf("bad relocation ptr %p map %p offset %d size %ld\n", + batch->ptr, batch->map, batch->ptr - batch->map, + batch->bo->size); + + ret = drm_intel_bo_emit_reloc(batch->bo, batch->ptr - batch->map, + buffer, delta, + read_domains, write_domain); + intel_batchbuffer_emit_dword(batch, buffer->offset + delta); + assert(ret == 0); +} + +void +intel_batchbuffer_data(struct intel_batchbuffer *batch, + const void *data, unsigned int bytes) +{ + assert((bytes & 3) == 0); + intel_batchbuffer_require_space(batch, bytes); + memcpy(batch->ptr, data, bytes); + batch->ptr += bytes; +} |