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Commit a5abf4e8 authored by Tom Tucker's avatar Tom Tucker
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svcrdma: Modify post recv path to use local dma key 



Update the svc_rdma_post_recv routine to use the adapter's global LKEY
instead of sc_phys_mr which is only valid when using a DMA MR.

Signed-off-by: default avatarTom Tucker <tom@opengridcomputing.com>
parent e1183210

net/sunrpc/xprtrdma/svc_rdma_transport.c

+9 −3
Original line number Diff line number Diff line
@@ -483,7 +483,7 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt) 
	struct ib_recv_wr recv_wr, *bad_recv_wr;

	struct svc_rdma_op_ctxt *ctxt;

	struct page *page;

	unsigned long pa;

	dma_addr_t pa;

	int sge_no;

	int buflen;

	int ret;
@@ -495,13 +495,15 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt) 
		BUG_ON(sge_no >= xprt->sc_max_sge);

		page = svc_rdma_get_page();

		ctxt->pages[sge_no] = page;

		atomic_inc(&xprt->sc_dma_used);

		pa = ib_dma_map_page(xprt->sc_cm_id->device,

				     page, 0, PAGE_SIZE,

				     DMA_FROM_DEVICE);

		if (ib_dma_mapping_error(xprt->sc_cm_id->device, pa))

			goto err_put_ctxt;

		atomic_inc(&xprt->sc_dma_used);

		ctxt->sge[sge_no].addr = pa;

		ctxt->sge[sge_no].length = PAGE_SIZE;

		ctxt->sge[sge_no].lkey = xprt->sc_phys_mr->lkey;

		ctxt->sge[sge_no].lkey = xprt->sc_dma_lkey;

		buflen += PAGE_SIZE;

	}

	ctxt->count = sge_no;
@@ -517,6 +519,10 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt) 
		svc_rdma_put_context(ctxt, 1);

	}

	return ret;



 err_put_ctxt:

	svc_rdma_put_context(ctxt, 1);

	return -ENOMEM;

}



/*