138 	struct dma_buffparms *dmap = audio_devs[dev]->dmap_out;  in sync_output()  local
140 	if (dmap->fragment_size <= 0)  in sync_output()
142 	dmap->flags |= DMA_POST;  in sync_output()
146 	if ((l = dmap->user_counter % dmap->fragment_size) > 0)  in sync_output()
149 		unsigned long offs = dmap->user_counter % dmap->bytes_in_use;  in sync_output()
151 		len = dmap->fragment_size - l;  in sync_output()
152 		memset(dmap->raw_buf + offs, dmap->neutral_byte, len);  in sync_output()
160 	p = dmap->qtail;  in sync_output()
161 	dmap->flags |= DMA_POST;  in sync_output()
163 	for (i = dmap->qlen + 1; i < dmap->nbufs; i++)  in sync_output()
165 		p = (p + 1) % dmap->nbufs;  in sync_output()
166 		if (((dmap->raw_buf + p * dmap->fragment_size) + dmap->fragment_size) >  in sync_output()
167 			(dmap->raw_buf + dmap->buffsize))  in sync_output()
170 		memset(dmap->raw_buf + p * dmap->fragment_size,  in sync_output()
171 			dmap->neutral_byte,  in sync_output()
172 			dmap->fragment_size);  in sync_output()
175 	dmap->flags |= DMA_DIRTY;  in sync_output()
383 	struct dma_buffparms *dmap;  in audio_ioctl()  local
509 			dmap = audio_devs[dev]->dmap_out;  in audio_ioctl()
512 			if (!(dmap->flags & DMA_ALLOC_DONE))  in audio_ioctl()
521 			count = DMAbuf_get_buffer_pointer (dev, dmap, DMODE_OUTPUT);  in audio_ioctl()
522 			if (count < dmap->fragment_size && dmap->qhead != 0)  in audio_ioctl()
523 				count += dmap->bytes_in_use;	/* Pointer wrap not handled yet */  in audio_ioctl()
524 			count += dmap->byte_counter;  in audio_ioctl()
527 			count = dmap->user_counter - count;  in audio_ioctl()
547 void reorganize_buffers(int dev, struct dma_buffparms *dmap, int recording)  in reorganize_buffers()  argument
563 		dmap->neutral_byte = NEUTRAL8;  in reorganize_buffers()
565 		dmap->neutral_byte = NEUTRAL16;  in reorganize_buffers()
578 	dmap->data_rate = sz;  in reorganize_buffers()
580 	if (!dmap->needs_reorg)  in reorganize_buffers()
582 	dmap->needs_reorg = 0;  in reorganize_buffers()
584 	if (dmap->fragment_size == 0)  in reorganize_buffers()
594 		bsz = dmap->buffsize;  in reorganize_buffers()
598 		if (bsz == dmap->buffsize)  in reorganize_buffers()
607 		if (dmap->subdivision == 0)	/* Not already set */  in reorganize_buffers()
609 			dmap->subdivision = 4;	/* Init to the default value */  in reorganize_buffers()
611 			if ((bsz / dmap->subdivision) > 4096)  in reorganize_buffers()
612 				dmap->subdivision *= 2;  in reorganize_buffers()
613 			if ((bsz / dmap->subdivision) < 4096)  in reorganize_buffers()
614 				dmap->subdivision = 1;  in reorganize_buffers()
616 		bsz /= dmap->subdivision;  in reorganize_buffers()
621 		dmap->fragment_size = bsz;  in reorganize_buffers()
629 		if (dmap->fragment_size > (dmap->buffsize / 2))  in reorganize_buffers()
630 			dmap->fragment_size = (dmap->buffsize / 2);  in reorganize_buffers()
631 		bsz = dmap->fragment_size;  in reorganize_buffers()
645 	n = dmap->buffsize / bsz;  in reorganize_buffers()
648 	if (n > dmap->max_fragments)  in reorganize_buffers()
649 		n = dmap->max_fragments;  in reorganize_buffers()
656 	dmap->nbufs = n;  in reorganize_buffers()
657 	dmap->bytes_in_use = n * bsz;  in reorganize_buffers()
658 	dmap->fragment_size = bsz;  in reorganize_buffers()
659 	dmap->max_byte_counter = (dmap->data_rate * 60 * 60) +  in reorganize_buffers()
660 			dmap->bytes_in_use;	/* Approximately one hour */  in reorganize_buffers()
662 	if (dmap->raw_buf)  in reorganize_buffers()
664 		memset(dmap->raw_buf, dmap->neutral_byte, dmap->bytes_in_use);  in reorganize_buffers()
667 	for (i = 0; i < dmap->nbufs; i++)  in reorganize_buffers()
669 		dmap->counts[i] = 0;  in reorganize_buffers()
672 	dmap->flags |= DMA_ALLOC_DONE | DMA_EMPTY;  in reorganize_buffers()
675 static int dma_subdivide(int dev, struct dma_buffparms *dmap, int fact)  in dma_subdivide()  argument
679 		fact = dmap->subdivision;  in dma_subdivide()
684 	if (dmap->subdivision != 0 || dmap->fragment_size)	/* Too late to change */  in dma_subdivide()
693 	dmap->subdivision = fact;  in dma_subdivide()
697 static int dma_set_fragment(int dev, struct dma_buffparms *dmap, int fact)  in dma_set_fragment()  argument
704 	if (dmap->subdivision != 0 ||  in dma_set_fragment()
705 	    dmap->fragment_size)	/* Too late to change */  in dma_set_fragment()
735 	dmap->fragment_size = (1 << bytes);  in dma_set_fragment()
736 	dmap->max_fragments = count;  in dma_set_fragment()
738 	if (dmap->fragment_size > dmap->buffsize)  in dma_set_fragment()
739 		dmap->fragment_size = dmap->buffsize;  in dma_set_fragment()
741 	if (dmap->fragment_size == dmap->buffsize &&  in dma_set_fragment()
743 		dmap->fragment_size /= 2;	/* Needs at least 2 buffers */  in dma_set_fragment()
745 	dmap->subdivision = 1;	/* Disable SNDCTL_DSP_SUBDIVIDE */  in dma_set_fragment()
753 	struct dma_buffparms *dmap;  in dma_ioctl()  local
779 			dmap = dmap_out;  in dma_ioctl()
785 				dmap = dmap_in;  in dma_ioctl()
786 			if (dmap->mapping_flags & DMA_MAP_MAPPED)  in dma_ioctl()
788 			if (!(dmap->flags & DMA_ALLOC_DONE))  in dma_ioctl()
789 				reorganize_buffers(dev, dmap, (cmd == SNDCTL_DSP_GETISPACE));  in dma_ioctl()
790 			info.fragstotal = dmap->nbufs;  in dma_ioctl()
792 				info.fragments = dmap->qlen;  in dma_ioctl()
813 			else if (info.fragments > dmap->nbufs)  in dma_ioctl()
814 				info.fragments = dmap->nbufs;  in dma_ioctl()
816 			info.fragsize = dmap->fragment_size;  in dma_ioctl()
817 			info.bytes = info.fragments * dmap->fragment_size;  in dma_ioctl()
819 			if (cmd == SNDCTL_DSP_GETISPACE && dmap->qlen)  in dma_ioctl()
820 				info.bytes -= dmap->counts[dmap->qhead];  in dma_ioctl()
823 				info.fragments = info.bytes / dmap->fragment_size;  in dma_ioctl()
824 				info.bytes -= dmap->user_counter % dmap->fragment_size;  in dma_ioctl()
951 			dmap = dmap_out;  in dma_ioctl()
959 				dmap = dmap_in;  in dma_ioctl()
960 			ret = dmap->fragment_size;  in dma_ioctl()