From 74fa39e5902faf1f5eb3ee642e2e069875a0343e Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 29 May 2007 07:14:59 -0300 Subject: V4L/DVB (5727): Remove VIVI_SCATTER vivi scatter method were used as a proof of concept. It can be safelly removed from mainstream, since the current method is faster and better than the previous solution. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/vivi.c | 163 --------------------------------------------- 1 file changed, 163 deletions(-) (limited to 'drivers/media/video') diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c index 3ef4d0159c3..582c6ba7c60 100644 --- a/drivers/media/video/vivi.c +++ b/drivers/media/video/vivi.c @@ -145,9 +145,6 @@ struct vivi_buffer { struct vivi_fmt *fmt; -#ifdef CONFIG_VIVI_SCATTER - struct sg_to_addr *to_addr; -#endif }; struct vivi_dmaqueue { @@ -232,68 +229,13 @@ static u8 bars[8][3] = { #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15 #define TSTAMP_MIN_X 64 -#ifdef CONFIG_VIVI_SCATTER -static void prep_to_addr(struct sg_to_addr to_addr[], - struct videobuf_buffer *vb) -{ - int i, pos=0; - - for (i=0;idma.nr_pages;i++) { - to_addr[i].sg=&vb->dma.sglist[i]; - to_addr[i].pos=pos; - pos += vb->dma.sglist[i].length; - } -} - -static int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[]) -{ - int p1=0,p2=pages-1,p3=pages/2; - - /* Sanity test */ - BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length); - - while (p1+1= to_addr[p2].pos) - p1=p2; - - return (p1); -} -#endif -#ifdef CONFIG_VIVI_SCATTER -static void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax, - int hmax, int line, char *timestr) -#else static void gen_line(char *basep,int inipos,int wmax, int hmax, int line, char *timestr) -#endif { int w,i,j,pos=inipos,y; char *p,*s; u8 chr,r,g,b,color; -#ifdef CONFIG_VIVI_SCATTER - int pgpos,oldpg; - char *basep; - struct page *pg; - - unsigned long flags; - spinlock_t spinlock; - - spin_lock_init(&spinlock); - - /* Get first addr pointed to pixel position */ - oldpg=get_addr_pos(pos,pages,to_addr); - pg=pfn_to_page(sg_dma_address(to_addr[oldpg].sg) >> PAGE_SHIFT); - spin_lock_irqsave(&spinlock,flags); - basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset; -#endif /* We will just duplicate the second pixel at the packet */ wmax/=2; @@ -305,18 +247,7 @@ static void gen_line(char *basep,int inipos,int wmax, b=bars[w*7/wmax][2]; for (color=0;color<4;color++) { -#ifdef CONFIG_VIVI_SCATTER - pgpos=get_addr_pos(pos,pages,to_addr); - if (pgpos!=oldpg) { - pg=pfn_to_page(sg_dma_address(to_addr[pgpos].sg) >> PAGE_SHIFT); - kunmap_atomic(basep, KM_BOUNCE_READ); - basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset; - oldpg=pgpos; - } - p=basep+pos-to_addr[pgpos].pos; -#else p=basep+pos; -#endif switch (color) { case 0: @@ -361,23 +292,7 @@ static void gen_line(char *basep,int inipos,int wmax, pos=inipos+j*2; for (color=0;color<4;color++) { -#ifdef CONFIG_VIVI_SCATTER - pgpos=get_addr_pos(pos,pages,to_addr); - if (pgpos!=oldpg) { - pg=pfn_to_page(sg_dma_address( - to_addr[pgpos].sg) - >> PAGE_SHIFT); - kunmap_atomic(basep, - KM_BOUNCE_READ); - basep= kmap_atomic(pg, - KM_BOUNCE_READ)+ - to_addr[pgpos].sg->offset; - oldpg=pgpos; - } - p=basep+pos-to_addr[pgpos].pos; -#else p=basep+pos; -#endif y=TO_Y(r,g,b); @@ -402,12 +317,7 @@ static void gen_line(char *basep,int inipos,int wmax, end: -#ifdef CONFIG_VIVI_SCATTER - kunmap_atomic(basep, KM_BOUNCE_READ); - spin_unlock_irqrestore(&spinlock,flags); -#else return; -#endif } static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf) { @@ -415,35 +325,16 @@ static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf) int hmax = buf->vb.height; int wmax = buf->vb.width; struct timeval ts; -#ifdef CONFIG_VIVI_SCATTER - struct sg_to_addr *to_addr=buf->to_addr; - struct videobuf_buffer *vb=&buf->vb; -#else char *tmpbuf; -#endif - -#ifdef CONFIG_VIVI_SCATTER - /* Test if DMA mapping is ready */ - if (!sg_dma_address(&vb->dma.sglist[0])) - return; - - prep_to_addr(to_addr,vb); - /* Check if there is enough memory */ - BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2); -#else if (buf->vb.dma.varea) { tmpbuf=kmalloc (wmax*2, GFP_KERNEL); } else { tmpbuf=buf->vb.dma.vmalloc; } -#endif for (h=0;hdma.nr_pages,wmax,hmax,h,dev->timestr); -#else if (buf->vb.dma.varea) { gen_line(tmpbuf,0,wmax,hmax,h,dev->timestr); /* FIXME: replacing to __copy_to_user */ @@ -452,7 +343,6 @@ static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf) } else { gen_line(tmpbuf,pos,wmax,hmax,h,dev->timestr); } -#endif pos += wmax*2; } @@ -718,11 +608,6 @@ static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf) if (in_interrupt()) BUG(); -#ifdef CONFIG_VIVI_SCATTER - /*FIXME: Maybe a spinlock is required here */ - kfree(buf->to_addr); - buf->to_addr=NULL; -#endif videobuf_waiton(&buf->vb,0,0); videobuf_dma_unmap(vq, &buf->vb.dma); @@ -768,12 +653,6 @@ buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, buf->vb.state = STATE_PREPARED; -#ifdef CONFIG_VIVI_SCATTER - if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) { - rc=-ENOMEM; - goto fail; - } -#endif return 0; fail: @@ -838,40 +717,6 @@ static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb free_buffer(vq,buf); } -#ifdef CONFIG_VIVI_SCATTER -static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents, - int direction) -{ - int i; - - dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents); - BUG_ON(direction == DMA_NONE); - - for (i = 0; i < nents; i++ ) { - BUG_ON(!sg[i].page); - - sg_dma_address(&sg[i]) = page_to_phys(sg[i].page) + sg[i].offset; - } - - return nents; -} - -static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages, - int direction) -{ - dprintk(1,"%s\n",__FUNCTION__); - return 0; -} - -static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages, - int direction) -{ -// dprintk(1,"%s\n",__FUNCTION__); - -// flush_write_buffers(); - return 0; -} -#endif static struct videobuf_queue_ops vivi_video_qops = { .buf_setup = buffer_setup, @@ -1260,19 +1105,11 @@ static int vivi_open(struct inode *inode, struct file *file) sprintf(dev->timestr,"%02d:%02d:%02d:%03d", dev->h,dev->m,dev->s,(dev->us+500)/1000); -#ifdef CONFIG_VIVI_SCATTER - videobuf_queue_init(&fh->vb_vidq,VIDEOBUF_DMA_SCATTER, &vivi_video_qops, - NULL, NULL, - fh->type, - V4L2_FIELD_INTERLACED, - sizeof(struct vivi_buffer),fh); -#else videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops, NULL, NULL, fh->type, V4L2_FIELD_INTERLACED, sizeof(struct vivi_buffer),fh); -#endif return 0; } -- cgit v1.2.3