Ejemplo n.º 1
0
static
int iser_fast_reg_fmr(struct iscsi_iser_task *iser_task,
		      struct iser_data_buf *mem,
		      struct iser_reg_resources *rsc,
		      struct iser_mem_reg *reg)
{
	struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
	struct iser_device *device = ib_conn->device;
	struct iser_page_vec *page_vec = rsc->page_vec;
	struct ib_fmr_pool *fmr_pool = rsc->fmr_pool;
	struct ib_pool_fmr *fmr;
	int ret, plen;

	page_vec->npages = 0;
	page_vec->fake_mr.page_size = SIZE_4K;
	plen = ib_sg_to_pages(&page_vec->fake_mr, mem->sg,
			      mem->size, NULL, iser_set_page);
	if (unlikely(plen < mem->size)) {
		iser_err("page vec too short to hold this SG\n");
		iser_data_buf_dump(mem, device->ib_device);
		iser_dump_page_vec(page_vec);
		return -EINVAL;
	}

	fmr  = ib_fmr_pool_map_phys(fmr_pool, page_vec->pages,
				    page_vec->npages, page_vec->pages[0]);
	if (IS_ERR(fmr)) {
		ret = PTR_ERR(fmr);
		iser_err("ib_fmr_pool_map_phys failed: %d\n", ret);
		return ret;
	}

	reg->sge.lkey = fmr->fmr->lkey;
	reg->rkey = fmr->fmr->rkey;
	reg->sge.addr = page_vec->fake_mr.iova;
	reg->sge.length = page_vec->fake_mr.length;
	reg->mem_h = fmr;

	iser_dbg("fmr reg: lkey=0x%x, rkey=0x%x, addr=0x%llx,"
		 " length=0x%x\n", reg->sge.lkey, reg->rkey,
		 reg->sge.addr, reg->sge.length);

	return 0;
}
Ejemplo n.º 2
0
static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
			 int sg_nents, unsigned int *sg_offset)
{
	struct rxe_mem *mr = to_rmr(ibmr);
	int n;

	mr->nbuf = 0;

	n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);

	mr->va = ibmr->iova;
	mr->iova = ibmr->iova;
	mr->length = ibmr->length;
	mr->page_shift = ilog2(ibmr->page_size);
	mr->page_mask = ibmr->page_size - 1;
	mr->offset = mr->iova & mr->page_mask;

	return n;
}