-static int
-rpcrdma_register_memwin_external(struct rpcrdma_mr_seg *seg,
- int *nsegs, int writing, struct rpcrdma_ia *ia,
- struct rpcrdma_xprt *r_xprt)
-{
- int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE :
- IB_ACCESS_REMOTE_READ);
- struct ib_mw_bind param;
- int rc;
-
- *nsegs = 1;
- rpcrdma_map_one(ia, seg, writing);
- param.bind_info.mr = ia->ri_bind_mem;
- param.wr_id = 0ULL; /* no send cookie */
- param.bind_info.addr = seg->mr_dma;
- param.bind_info.length = seg->mr_len;
- param.send_flags = 0;
- param.bind_info.mw_access_flags = mem_priv;
-
- DECR_CQCOUNT(&r_xprt->rx_ep);
- rc = ib_bind_mw(ia->ri_id->qp, seg->mr_chunk.rl_mw->r.mw, ¶m);
- if (rc) {
- dprintk("RPC: %s: failed ib_bind_mw "
- "%u@0x%llx status %i\n",
- __func__, seg->mr_len,
- (unsigned long long)seg->mr_dma, rc);
- rpcrdma_unmap_one(ia, seg);
- } else {
- seg->mr_rkey = seg->mr_chunk.rl_mw->r.mw->rkey;
- seg->mr_base = param.bind_info.addr;
- seg->mr_nsegs = 1;
- }
- return rc;
-}
-
-static int
-rpcrdma_deregister_memwin_external(struct rpcrdma_mr_seg *seg,
- struct rpcrdma_ia *ia,
- struct rpcrdma_xprt *r_xprt, void **r)
-{
- struct ib_mw_bind param;
- LIST_HEAD(l);
- int rc;
-
- BUG_ON(seg->mr_nsegs != 1);
- param.bind_info.mr = ia->ri_bind_mem;
- param.bind_info.addr = 0ULL; /* unbind */
- param.bind_info.length = 0;
- param.bind_info.mw_access_flags = 0;
- if (*r) {
- param.wr_id = (u64) (unsigned long) *r;
- param.send_flags = IB_SEND_SIGNALED;
- INIT_CQCOUNT(&r_xprt->rx_ep);
- } else {
- param.wr_id = 0ULL;
- param.send_flags = 0;
- DECR_CQCOUNT(&r_xprt->rx_ep);
- }
- rc = ib_bind_mw(ia->ri_id->qp, seg->mr_chunk.rl_mw->r.mw, ¶m);
- rpcrdma_unmap_one(ia, seg);
- if (rc)
- dprintk("RPC: %s: failed ib_(un)bind_mw,"
- " status %i\n", __func__, rc);
- else
- *r = NULL; /* will upcall on completion */
- return rc;
-}
-
-static int
-rpcrdma_register_default_external(struct rpcrdma_mr_seg *seg,
- int *nsegs, int writing, struct rpcrdma_ia *ia)
-{
- int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE :
- IB_ACCESS_REMOTE_READ);
- struct rpcrdma_mr_seg *seg1 = seg;
- struct ib_phys_buf ipb[RPCRDMA_MAX_DATA_SEGS];
- int len, i, rc = 0;
-
- if (*nsegs > RPCRDMA_MAX_DATA_SEGS)
- *nsegs = RPCRDMA_MAX_DATA_SEGS;
- for (len = 0, i = 0; i < *nsegs;) {
- rpcrdma_map_one(ia, seg, writing);
- ipb[i].addr = seg->mr_dma;
- ipb[i].size = seg->mr_len;
- len += seg->mr_len;
- ++seg;
- ++i;
- /* Check for holes */
- if ((i < *nsegs && offset_in_page(seg->mr_offset)) ||
- offset_in_page((seg-1)->mr_offset+(seg-1)->mr_len))
- break;
- }
- seg1->mr_base = seg1->mr_dma;
- seg1->mr_chunk.rl_mr = ib_reg_phys_mr(ia->ri_pd,
- ipb, i, mem_priv, &seg1->mr_base);
- if (IS_ERR(seg1->mr_chunk.rl_mr)) {
- rc = PTR_ERR(seg1->mr_chunk.rl_mr);
- dprintk("RPC: %s: failed ib_reg_phys_mr "
- "%u@0x%llx (%d)... status %i\n",
- __func__, len,
- (unsigned long long)seg1->mr_dma, i, rc);
- while (i--)
- rpcrdma_unmap_one(ia, --seg);
- } else {
- seg1->mr_rkey = seg1->mr_chunk.rl_mr->rkey;
- seg1->mr_nsegs = i;
- seg1->mr_len = len;
- }
- *nsegs = i;
- return rc;
-}
-
-static int
-rpcrdma_deregister_default_external(struct rpcrdma_mr_seg *seg,
- struct rpcrdma_ia *ia)
-{
- struct rpcrdma_mr_seg *seg1 = seg;
- int rc;
-
- rc = ib_dereg_mr(seg1->mr_chunk.rl_mr);
- seg1->mr_chunk.rl_mr = NULL;
- while (seg1->mr_nsegs--)
- rpcrdma_unmap_one(ia, seg++);
- if (rc)
- dprintk("RPC: %s: failed ib_dereg_mr,"
- " status %i\n", __func__, rc);
- return rc;
-}
-