83 			  struct scatterlist *sg, unsigned int nents);
251 static void rds_iw_set_scatterlist(struct rds_iw_scatterlist *sg,  argument
254 	sg->list = list;
255 	sg->len = sg_len;
256 	sg->dma_len = 0;
257 	sg->dma_npages = 0;
258 	sg->bytes = 0;
262 			struct rds_iw_scatterlist *sg)  argument
268 	WARN_ON(sg->dma_len);
270 	sg->dma_len = ib_dma_map_sg(dev, sg->list, sg->len, DMA_BIDIRECTIONAL);
271 	if (unlikely(!sg->dma_len)) {
276 	sg->bytes = 0;
277 	sg->dma_npages = 0;
280 	for (i = 0; i < sg->dma_len; ++i) {
281 		unsigned int dma_len = ib_sg_dma_len(dev, &sg->list[i]);
282 		u64 dma_addr = ib_sg_dma_address(dev, &sg->list[i]);
285 		sg->bytes += dma_len;
294 			if (i < sg->dma_len - 1)
299 		sg->dma_npages += (end_addr - dma_addr) >> PAGE_SHIFT;
303 	if (sg->dma_npages > fastreg_message_size)
306 	dma_pages = kmalloc(sizeof(u64) * sg->dma_npages, GFP_ATOMIC);
312 	for (i = j = 0; i < sg->dma_len; ++i) {
313 		unsigned int dma_len = ib_sg_dma_len(dev, &sg->list[i]);
314 		u64 dma_addr = ib_sg_dma_address(dev, &sg->list[i]);
321 		BUG_ON(j > sg->dma_npages);
327 	ib_dma_unmap_sg(rds_iwdev->dev, sg->list, sg->len, DMA_BIDIRECTIONAL);
328 	sg->dma_len = 0;
591 void *rds_iw_get_mr(struct scatterlist *sg, unsigned long nents,  argument
625 	ret = rds_iw_map_fastreg(rds_iwdev->mr_pool, ibmr, sg, nents);
760 			struct scatterlist *sg,  argument
768 	rds_iw_set_scatterlist(&mapping->m_sg, sg, sg_len);