Steve I have not checked the code because I am away from my laptop But I assume mlx and mthca is using fmr and cxgb4 is using rdma-read-with-invalidate which has implicit fence. If invalidate is issued before read is completed its a problem.
Regards Devesh ____________________________________ From: Steve Wise [sw...@opengridcomputing.com] Sent: Friday, May 30, 2014 6:32 PM To: Devesh Sharma; bfie...@fieldses.org Cc: linux-...@vger.kernel.org; linux-rdma@vger.kernel.org; t...@opengridcomputing.com Subject: RE: [PATCH V3] svcrdma: refactor marshalling logic > > Hi Steve > > I am testing this patch. I have found that when server tries to initiate > RDMA-READ on ocrdma > device the RDMA-READ posting fails because there is no FENCE bit set for > Non-iwarp device which is using frmr. Because of this, whenever server tries > to initiate > RDMA_READ operation, it fails with completion error. > This bug was there in v1 and v2 as well. > Why would the FENCE bit not be required for mlx4, mthca, cxgb4, and yet be required for ocrdma? > Check inline for the exact location of the change. > > Rest is okay from my side, iozone is passing with this patch. Off-course > after putting a FENCE > indicator. > > -Regards > Devesh > > > -----Original Message----- > > From: linux-rdma-ow...@vger.kernel.org [mailto:linux-rdma- > > ow...@vger.kernel.org] On Behalf Of Steve Wise > > Sent: Thursday, May 29, 2014 10:26 PM > > To: bfie...@fieldses.org > > Cc: linux-...@vger.kernel.org; linux-rdma@vger.kernel.org; > > t...@opengridcomputing.com > > Subject: [PATCH V3] svcrdma: refactor marshalling logic > > > > This patch refactors the NFSRDMA server marshalling logic to remove the > > intermediary map structures. It also fixes an existing bug where the > > NFSRDMA server was not minding the device fast register page list length > > limitations. > > > > I've also made a git repo available with these patches on top of 3.15-rc7: > > > > git://git.linux-nfs.org/projects/swise/linux.git svcrdma-refactor-v3 > > > > Changes since V2: > > > > - fixed logic bug in rdma_read_chunk_frmr() and rdma_read_chunk_lcl() > > > > - in rdma_read_chunks(), set the reader function pointer only once since > > it doesn't change > > > > - squashed the patch back into one patch since the previous split wasn't > > bisectable > > > > Changes since V1: > > > > - fixed regression for devices that don't support FRMRs (see > > rdma_read_chunk_lcl()) > > > > - split patch up for closer review. However I request it be squashed > > before merging as they is not bisectable, and I think these changes > > should all be a single commit anyway. > > > > Please review, and test if you can. I'd like this to hit 3.16. > > > > Signed-off-by: Tom Tucker <t...@opengridcomputing.com> > > Signed-off-by: Steve Wise <sw...@opengridcomputing.com> > > --- > > > > include/linux/sunrpc/svc_rdma.h | 3 > > net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 643 +++++++++++++---------- > > ------- > > net/sunrpc/xprtrdma/svc_rdma_sendto.c | 230 +---------- > > net/sunrpc/xprtrdma/svc_rdma_transport.c | 62 ++- > > 4 files changed, 332 insertions(+), 606 deletions(-) > > > > diff --git a/include/linux/sunrpc/svc_rdma.h > > b/include/linux/sunrpc/svc_rdma.h index 0b8e3e6..5cf99a0 100644 > > --- a/include/linux/sunrpc/svc_rdma.h > > +++ b/include/linux/sunrpc/svc_rdma.h > > @@ -115,14 +115,13 @@ struct svc_rdma_fastreg_mr { > > struct list_head frmr_list; > > }; > > struct svc_rdma_req_map { > > - struct svc_rdma_fastreg_mr *frmr; > > unsigned long count; > > union { > > struct kvec sge[RPCSVC_MAXPAGES]; > > struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES]; > > + unsigned long lkey[RPCSVC_MAXPAGES]; > > }; > > }; > > -#define RDMACTXT_F_FAST_UNREG 1 > > #define RDMACTXT_F_LAST_CTXT 2 > > > > #define SVCRDMA_DEVCAP_FAST_REG 1 /* > > fast mr registration */ > > diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > > b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > > index 8d904e4..52d9f2c 100644 > > --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > > +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > > @@ -1,4 +1,5 @@ > > /* > > + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. > > * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. > > * > > * This software is available to you under a choice of one of two @@ -69,7 > > +70,8 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, > > > > /* Set up the XDR head */ > > rqstp->rq_arg.head[0].iov_base = page_address(page); > > - rqstp->rq_arg.head[0].iov_len = min(byte_count, ctxt- > > >sge[0].length); > > + rqstp->rq_arg.head[0].iov_len = > > + min_t(size_t, byte_count, ctxt->sge[0].length); > > rqstp->rq_arg.len = byte_count; > > rqstp->rq_arg.buflen = byte_count; > > > > @@ -85,7 +87,7 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, > > page = ctxt->pages[sge_no]; > > put_page(rqstp->rq_pages[sge_no]); > > rqstp->rq_pages[sge_no] = page; > > - bc -= min(bc, ctxt->sge[sge_no].length); > > + bc -= min_t(u32, bc, ctxt->sge[sge_no].length); > > rqstp->rq_arg.buflen += ctxt->sge[sge_no].length; > > sge_no++; > > } > > @@ -113,291 +115,265 @@ static void rdma_build_arg_xdr(struct svc_rqst > > *rqstp, > > rqstp->rq_arg.tail[0].iov_len = 0; > > } > > > > -/* Encode a read-chunk-list as an array of IB SGE > > - * > > - * Assumptions: > > - * - chunk[0]->position points to pages[0] at an offset of 0 > > - * - pages[] is not physically or virtually contiguous and consists of > > - * PAGE_SIZE elements. > > - * > > - * Output: > > - * - sge array pointing into pages[] array. > > - * - chunk_sge array specifying sge index and count for each > > - * chunk in the read list > > - * > > - */ > > -static int map_read_chunks(struct svcxprt_rdma *xprt, > > - struct svc_rqst *rqstp, > > - struct svc_rdma_op_ctxt *head, > > - struct rpcrdma_msg *rmsgp, > > - struct svc_rdma_req_map *rpl_map, > > - struct svc_rdma_req_map *chl_map, > > - int ch_count, > > - int byte_count) > > +static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) > > { > > - int sge_no; > > - int sge_bytes; > > - int page_off; > > - int page_no; > > - int ch_bytes; > > - int ch_no; > > - struct rpcrdma_read_chunk *ch; > > + if (rdma_node_get_transport(xprt->sc_cm_id->device->node_type) > > == > > + RDMA_TRANSPORT_IWARP) > > + return 1; > > + else > > + return min_t(int, sge_count, xprt->sc_max_sge); } > > > > - sge_no = 0; > > - page_no = 0; > > - page_off = 0; > > - ch = (struct rpcrdma_read_chunk *)&rmsgp- > > >rm_body.rm_chunks[0]; > > - ch_no = 0; > > - ch_bytes = ntohl(ch->rc_target.rs_length); > > - head->arg.head[0] = rqstp->rq_arg.head[0]; > > - head->arg.tail[0] = rqstp->rq_arg.tail[0]; > > - head->arg.pages = &head->pages[head->count]; > > - head->hdr_count = head->count; /* save count of hdr pages */ > > - head->arg.page_base = 0; > > - head->arg.page_len = ch_bytes; > > - head->arg.len = rqstp->rq_arg.len + ch_bytes; > > - head->arg.buflen = rqstp->rq_arg.buflen + ch_bytes; > > - head->count++; > > - chl_map->ch[0].start = 0; > > - while (byte_count) { > > - rpl_map->sge[sge_no].iov_base = > > - page_address(rqstp->rq_arg.pages[page_no]) + > > page_off; > > - sge_bytes = min_t(int, PAGE_SIZE-page_off, ch_bytes); > > - rpl_map->sge[sge_no].iov_len = sge_bytes; > > - /* > > - * Don't bump head->count here because the same page > > - * may be used by multiple SGE. > > - */ > > - head->arg.pages[page_no] = rqstp->rq_arg.pages[page_no]; > > - rqstp->rq_respages = &rqstp->rq_arg.pages[page_no+1]; > > +typedef int (*rdma_reader_fn)(struct svcxprt_rdma *xprt, > > + struct svc_rqst *rqstp, > > + struct svc_rdma_op_ctxt *head, > > + int *page_no, > > + u32 *page_offset, > > + u32 rs_handle, > > + u32 rs_length, > > + u64 rs_offset, > > + int last); > > + > > +/* Issue an RDMA_READ using the local lkey to map the data sink */ > > +static int rdma_read_chunk_lcl(struct svcxprt_rdma *xprt, > > + struct svc_rqst *rqstp, > > + struct svc_rdma_op_ctxt *head, > > + int *page_no, > > + u32 *page_offset, > > + u32 rs_handle, > > + u32 rs_length, > > + u64 rs_offset, > > + int last) > > +{ > > + struct ib_send_wr read_wr; > > + int pages_needed = PAGE_ALIGN(*page_offset + rs_length) >> > > PAGE_SHIFT; > > + struct svc_rdma_op_ctxt *ctxt = svc_rdma_get_context(xprt); > > + int ret, read, pno; > > + u32 pg_off = *page_offset; > > + u32 pg_no = *page_no; > > + > > + ctxt->direction = DMA_FROM_DEVICE; > > + ctxt->read_hdr = head; > > + pages_needed = > > + min_t(int, pages_needed, rdma_read_max_sge(xprt, > > pages_needed)); > > + read = min_t(int, pages_needed << PAGE_SHIFT, rs_length); > > + > > + for (pno = 0; pno < pages_needed; pno++) { > > + int len = min_t(int, rs_length, PAGE_SIZE - pg_off); > > + > > + head->arg.pages[pg_no] = rqstp->rq_arg.pages[pg_no]; > > + head->arg.page_len += len; > > + head->arg.len += len; > > + if (!pg_off) > > + head->count++; > > + rqstp->rq_respages = &rqstp->rq_arg.pages[pg_no+1]; > > rqstp->rq_next_page = rqstp->rq_respages + 1; > > + ctxt->sge[pno].addr = > > + ib_dma_map_page(xprt->sc_cm_id->device, > > + head->arg.pages[pg_no], pg_off, > > + PAGE_SIZE - pg_off, > > + DMA_FROM_DEVICE); > > + ret = ib_dma_mapping_error(xprt->sc_cm_id->device, > > + ctxt->sge[pno].addr); > > + if (ret) > > + goto err; > > + atomic_inc(&xprt->sc_dma_used); > > > > - byte_count -= sge_bytes; > > - ch_bytes -= sge_bytes; > > - sge_no++; > > - /* > > - * If all bytes for this chunk have been mapped to an > > - * SGE, move to the next SGE > > - */ > > - if (ch_bytes == 0) { > > - chl_map->ch[ch_no].count = > > - sge_no - chl_map->ch[ch_no].start; > > - ch_no++; > > - ch++; > > - chl_map->ch[ch_no].start = sge_no; > > - ch_bytes = ntohl(ch->rc_target.rs_length); > > - /* If bytes remaining account for next chunk */ > > - if (byte_count) { > > - head->arg.page_len += ch_bytes; > > - head->arg.len += ch_bytes; > > - head->arg.buflen += ch_bytes; > > - } > > + /* The lkey here is either a local dma lkey or a dma_mr lkey > > */ > > + ctxt->sge[pno].lkey = xprt->sc_dma_lkey; > > + ctxt->sge[pno].length = len; > > + ctxt->count++; > > + > > + /* adjust offset and wrap to next page if needed */ > > + pg_off += len; > > + if (pg_off == PAGE_SIZE) { > > + pg_off = 0; > > + pg_no++; > > } > > - /* > > - * If this SGE consumed all of the page, move to the > > - * next page > > - */ > > - if ((sge_bytes + page_off) == PAGE_SIZE) { > > - page_no++; > > - page_off = 0; > > - /* > > - * If there are still bytes left to map, bump > > - * the page count > > - */ > > - if (byte_count) > > - head->count++; > > - } else > > - page_off += sge_bytes; > > + rs_length -= len; > > } > > - BUG_ON(byte_count != 0); > > - return sge_no; > > + > > + if (last && rs_length == 0) > > + set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); > > + else > > + clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); > > + > > + memset(&read_wr, 0, sizeof(read_wr)); > > + read_wr.wr_id = (unsigned long)ctxt; > > + read_wr.opcode = IB_WR_RDMA_READ; > > + ctxt->wr_op = read_wr.opcode; > > + read_wr.send_flags = IB_SEND_SIGNALED; > > + read_wr.wr.rdma.rkey = rs_handle; > > + read_wr.wr.rdma.remote_addr = rs_offset; > > + read_wr.sg_list = ctxt->sge; > > + read_wr.num_sge = pages_needed; > > + > > + ret = svc_rdma_send(xprt, &read_wr); > > + if (ret) { > > + pr_err("svcrdma: Error %d posting RDMA_READ\n", ret); > > + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); > > + goto err; > > + } > > + > > + /* return current location in page array */ > > + *page_no = pg_no; > > + *page_offset = pg_off; > > + ret = read; > > + atomic_inc(&rdma_stat_read); > > + return ret; > > + err: > > + svc_rdma_unmap_dma(ctxt); > > + svc_rdma_put_context(ctxt, 0); > > + return ret; > > } > > > > -/* Map a read-chunk-list to an XDR and fast register the page-list. > > - * > > - * Assumptions: > > - * - chunk[0] position points to pages[0] at an offset of 0 > > - * - pages[] will be made physically contiguous by creating a one-off > > memory > > - * region using the fastreg verb. > > - * - byte_count is # of bytes in read-chunk-list > > - * - ch_count is # of chunks in read-chunk-list > > - * > > - * Output: > > - * - sge array pointing into pages[] array. > > - * - chunk_sge array specifying sge index and count for each > > - * chunk in the read list > > - */ > > -static int fast_reg_read_chunks(struct svcxprt_rdma *xprt, > > +/* Issue an RDMA_READ using an FRMR to map the data sink */ static int > > +rdma_read_chunk_frmr(struct svcxprt_rdma *xprt, > > struct svc_rqst *rqstp, > > struct svc_rdma_op_ctxt *head, > > - struct rpcrdma_msg *rmsgp, > > - struct svc_rdma_req_map *rpl_map, > > - struct svc_rdma_req_map *chl_map, > > - int ch_count, > > - int byte_count) > > + int *page_no, > > + u32 *page_offset, > > + u32 rs_handle, > > + u32 rs_length, > > + u64 rs_offset, > > + int last) > > { > > - int page_no; > > - int ch_no; > > - u32 offset; > > - struct rpcrdma_read_chunk *ch; > > - struct svc_rdma_fastreg_mr *frmr; > > - int ret = 0; > > + struct ib_send_wr read_wr; > > + struct ib_send_wr inv_wr; > > + struct ib_send_wr fastreg_wr; > > + u8 key; > > + int pages_needed = PAGE_ALIGN(*page_offset + rs_length) >> > > PAGE_SHIFT; > > + struct svc_rdma_op_ctxt *ctxt = svc_rdma_get_context(xprt); > > + struct svc_rdma_fastreg_mr *frmr = svc_rdma_get_frmr(xprt); > > + int ret, read, pno; > > + u32 pg_off = *page_offset; > > + u32 pg_no = *page_no; > > > > - frmr = svc_rdma_get_frmr(xprt); > > if (IS_ERR(frmr)) > > return -ENOMEM; > > > > - head->frmr = frmr; > > - head->arg.head[0] = rqstp->rq_arg.head[0]; > > - head->arg.tail[0] = rqstp->rq_arg.tail[0]; > > - head->arg.pages = &head->pages[head->count]; > > - head->hdr_count = head->count; /* save count of hdr pages */ > > - head->arg.page_base = 0; > > - head->arg.page_len = byte_count; > > - head->arg.len = rqstp->rq_arg.len + byte_count; > > - head->arg.buflen = rqstp->rq_arg.buflen + byte_count; > > + ctxt->direction = DMA_FROM_DEVICE; > > + ctxt->frmr = frmr; > > + pages_needed = min_t(int, pages_needed, xprt- > > >sc_frmr_pg_list_len); > > + read = min_t(int, pages_needed << PAGE_SHIFT, rs_length); > > > > - /* Fast register the page list */ > > - frmr->kva = page_address(rqstp->rq_arg.pages[0]); > > + frmr->kva = page_address(rqstp->rq_arg.pages[pg_no]); > > frmr->direction = DMA_FROM_DEVICE; > > frmr->access_flags = > > (IB_ACCESS_LOCAL_WRITE|IB_ACCESS_REMOTE_WRITE); > > - frmr->map_len = byte_count; > > - frmr->page_list_len = PAGE_ALIGN(byte_count) >> PAGE_SHIFT; > > - for (page_no = 0; page_no < frmr->page_list_len; page_no++) { > > - frmr->page_list->page_list[page_no] = > > + frmr->map_len = pages_needed << PAGE_SHIFT; > > + frmr->page_list_len = pages_needed; > > + > > + for (pno = 0; pno < pages_needed; pno++) { > > + int len = min_t(int, rs_length, PAGE_SIZE - pg_off); > > + > > + head->arg.pages[pg_no] = rqstp->rq_arg.pages[pg_no]; > > + head->arg.page_len += len; > > + head->arg.len += len; > > + if (!pg_off) > > + head->count++; > > + rqstp->rq_respages = &rqstp->rq_arg.pages[pg_no+1]; > > + rqstp->rq_next_page = rqstp->rq_respages + 1; > > + frmr->page_list->page_list[pno] = > > ib_dma_map_page(xprt->sc_cm_id->device, > > - rqstp->rq_arg.pages[page_no], 0, > > + head->arg.pages[pg_no], 0, > > PAGE_SIZE, DMA_FROM_DEVICE); > > - if (ib_dma_mapping_error(xprt->sc_cm_id->device, > > - frmr->page_list- > > >page_list[page_no])) > > - goto fatal_err; > > + ret = ib_dma_mapping_error(xprt->sc_cm_id->device, > > + frmr->page_list->page_list[pno]); > > + if (ret) > > + goto err; > > atomic_inc(&xprt->sc_dma_used); > > - head->arg.pages[page_no] = rqstp->rq_arg.pages[page_no]; > > - } > > - head->count += page_no; > > - > > - /* rq_respages points one past arg pages */ > > - rqstp->rq_respages = &rqstp->rq_arg.pages[page_no]; > > - rqstp->rq_next_page = rqstp->rq_respages + 1; > > > > - /* Create the reply and chunk maps */ > > - offset = 0; > > - ch = (struct rpcrdma_read_chunk *)&rmsgp- > > >rm_body.rm_chunks[0]; > > - for (ch_no = 0; ch_no < ch_count; ch_no++) { > > - int len = ntohl(ch->rc_target.rs_length); > > - rpl_map->sge[ch_no].iov_base = frmr->kva + offset; > > - rpl_map->sge[ch_no].iov_len = len; > > - chl_map->ch[ch_no].count = 1; > > - chl_map->ch[ch_no].start = ch_no; > > - offset += len; > > - ch++; > > + /* adjust offset and wrap to next page if needed */ > > + pg_off += len; > > + if (pg_off == PAGE_SIZE) { > > + pg_off = 0; > > + pg_no++; > > + } > > + rs_length -= len; > > } > > > > - ret = svc_rdma_fastreg(xprt, frmr); > > - if (ret) > > - goto fatal_err; > > - > > - return ch_no; > > - > > - fatal_err: > > - printk("svcrdma: error fast registering xdr for xprt %p", xprt); > > - svc_rdma_put_frmr(xprt, frmr); > > - return -EIO; > > -} > > - > > -static int rdma_set_ctxt_sge(struct svcxprt_rdma *xprt, > > - struct svc_rdma_op_ctxt *ctxt, > > - struct svc_rdma_fastreg_mr *frmr, > > - struct kvec *vec, > > - u64 *sgl_offset, > > - int count) > > -{ > > - int i; > > - unsigned long off; > > + if (last && rs_length == 0) > > + set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); > > + else > > + clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); > > > > - ctxt->count = count; > > - ctxt->direction = DMA_FROM_DEVICE; > > - for (i = 0; i < count; i++) { > > - ctxt->sge[i].length = 0; /* in case map fails */ > > - if (!frmr) { > > - BUG_ON(!virt_to_page(vec[i].iov_base)); > > - off = (unsigned long)vec[i].iov_base & > > ~PAGE_MASK; > > - ctxt->sge[i].addr = > > - ib_dma_map_page(xprt->sc_cm_id->device, > > - > > virt_to_page(vec[i].iov_base), > > - off, > > - vec[i].iov_len, > > - DMA_FROM_DEVICE); > > - if (ib_dma_mapping_error(xprt->sc_cm_id->device, > > - ctxt->sge[i].addr)) > > - return -EINVAL; > > - ctxt->sge[i].lkey = xprt->sc_dma_lkey; > > - atomic_inc(&xprt->sc_dma_used); > > - } else { > > - ctxt->sge[i].addr = (unsigned long)vec[i].iov_base; > > - ctxt->sge[i].lkey = frmr->mr->lkey; > > - } > > - ctxt->sge[i].length = vec[i].iov_len; > > - *sgl_offset = *sgl_offset + vec[i].iov_len; > > + /* Bump the key */ > > + key = (u8)(frmr->mr->lkey & 0x000000FF); > > + ib_update_fast_reg_key(frmr->mr, ++key); > > + > > + ctxt->sge[0].addr = (unsigned long)frmr->kva + *page_offset; > > + ctxt->sge[0].lkey = frmr->mr->lkey; > > + ctxt->sge[0].length = read; > > + ctxt->count = 1; > > + ctxt->read_hdr = head; > > + > > + /* Prepare FASTREG WR */ > > + memset(&fastreg_wr, 0, sizeof(fastreg_wr)); > > + fastreg_wr.opcode = IB_WR_FAST_REG_MR; > > + fastreg_wr.send_flags = IB_SEND_SIGNALED; > > + fastreg_wr.wr.fast_reg.iova_start = (unsigned long)frmr->kva; > > + fastreg_wr.wr.fast_reg.page_list = frmr->page_list; > > + fastreg_wr.wr.fast_reg.page_list_len = frmr->page_list_len; > > + fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; > > + fastreg_wr.wr.fast_reg.length = frmr->map_len; > > + fastreg_wr.wr.fast_reg.access_flags = frmr->access_flags; > > + fastreg_wr.wr.fast_reg.rkey = frmr->mr->lkey; > > + fastreg_wr.next = &read_wr; > > + > > + /* Prepare RDMA_READ */ > > + memset(&read_wr, 0, sizeof(read_wr)); > > + read_wr.send_flags = IB_SEND_SIGNALED; > > + read_wr.wr.rdma.rkey = rs_handle; > > + read_wr.wr.rdma.remote_addr = rs_offset; > > + read_wr.sg_list = ctxt->sge; > > + read_wr.num_sge = 1; > > + if (xprt->sc_dev_caps & SVCRDMA_DEVCAP_READ_W_INV) { > > + read_wr.opcode = IB_WR_RDMA_READ_WITH_INV; > > + read_wr.wr_id = (unsigned long)ctxt; > > + read_wr.ex.invalidate_rkey = ctxt->frmr->mr->lkey; > > + } else { > > + read_wr.opcode = IB_WR_RDMA_READ; > > + read_wr.next = &inv_wr; > > + /* Prepare invalidate */ > > + memset(&inv_wr, 0, sizeof(inv_wr)); > > + inv_wr.wr_id = (unsigned long)ctxt; > > + inv_wr.opcode = IB_WR_LOCAL_INV; > > + inv_wr.send_flags = IB_SEND_SIGNALED; > > Change this to inv_wr.send_flags = IB_SEND_SIGNALED | IB_SEND_FENCE; > > > + inv_wr.ex.invalidate_rkey = frmr->mr->lkey; > > + } > > + ctxt->wr_op = read_wr.opcode; > > + > > + /* Post the chain */ > > + ret = svc_rdma_send(xprt, &fastreg_wr); > > + if (ret) { > > + pr_err("svcrdma: Error %d posting RDMA_READ\n", ret); > > + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); > > + goto err; > > } > > - return 0; > > -} > > > > -static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) -{ > > - if ((rdma_node_get_transport(xprt->sc_cm_id->device- > > >node_type) == > > - RDMA_TRANSPORT_IWARP) && > > - sge_count > 1) > > - return 1; > > - else > > - return min_t(int, sge_count, xprt->sc_max_sge); > > + /* return current location in page array */ > > + *page_no = pg_no; > > + *page_offset = pg_off; > > + ret = read; > > + atomic_inc(&rdma_stat_read); > > + return ret; > > + err: > > + svc_rdma_unmap_dma(ctxt); > > + svc_rdma_put_context(ctxt, 0); > > + svc_rdma_put_frmr(xprt, frmr); > > + return ret; > > } > > > > -/* > > - * Use RDMA_READ to read data from the advertised client buffer into the > > - * XDR stream starting at rq_arg.head[0].iov_base. > > - * Each chunk in the array > > - * contains the following fields: > > - * discrim - '1', This isn't used for data placement > > - * position - The xdr stream offset (the same for every chunk) > > - * handle - RMR for client memory region > > - * length - data transfer length > > - * offset - 64 bit tagged offset in remote memory region > > - * > > - * On our side, we need to read into a pagelist. The first page immediately > > - * follows the RPC header. > > - * > > - * This function returns: > > - * 0 - No error and no read-list found. > > - * > > - * 1 - Successful read-list processing. The data is not yet in > > - * the pagelist and therefore the RPC request must be deferred. The > > - * I/O completion will enqueue the transport again and > > - * svc_rdma_recvfrom will complete the request. > > - * > > - * <0 - Error processing/posting read-list. > > - * > > - * NOTE: The ctxt must not be touched after the last WR has been posted > > - * because the I/O completion processing may occur on another > > - * processor and free / modify the context. Ne touche pas! > > - */ > > -static int rdma_read_xdr(struct svcxprt_rdma *xprt, > > - struct rpcrdma_msg *rmsgp, > > - struct svc_rqst *rqstp, > > - struct svc_rdma_op_ctxt *hdr_ctxt) > > +static int rdma_read_chunks(struct svcxprt_rdma *xprt, > > + struct rpcrdma_msg *rmsgp, > > + struct svc_rqst *rqstp, > > + struct svc_rdma_op_ctxt *head) > > { > > - struct ib_send_wr read_wr; > > - struct ib_send_wr inv_wr; > > - int err = 0; > > - int ch_no; > > - int ch_count; > > - int byte_count; > > - int sge_count; > > - u64 sgl_offset; > > + int page_no, ch_count, ret; > > struct rpcrdma_read_chunk *ch; > > - struct svc_rdma_op_ctxt *ctxt = NULL; > > - struct svc_rdma_req_map *rpl_map; > > - struct svc_rdma_req_map *chl_map; > > + u32 page_offset, byte_count; > > + u64 rs_offset; > > + rdma_reader_fn reader; > > > > /* If no read list is present, return 0 */ > > ch = svc_rdma_get_read_chunk(rmsgp); > > @@ -408,122 +384,55 @@ static int rdma_read_xdr(struct svcxprt_rdma > > *xprt, > > if (ch_count > RPCSVC_MAXPAGES) > > return -EINVAL; > > > > - /* Allocate temporary reply and chunk maps */ > > - rpl_map = svc_rdma_get_req_map(); > > - chl_map = svc_rdma_get_req_map(); > > + /* The request is completed when the RDMA_READs complete. The > > + * head context keeps all the pages that comprise the > > + * request. > > + */ > > + head->arg.head[0] = rqstp->rq_arg.head[0]; > > + head->arg.tail[0] = rqstp->rq_arg.tail[0]; > > + head->arg.pages = &head->pages[head->count]; > > + head->hdr_count = head->count; > > + head->arg.page_base = 0; > > + head->arg.page_len = 0; > > + head->arg.len = rqstp->rq_arg.len; > > + head->arg.buflen = rqstp->rq_arg.buflen; > > > > - if (!xprt->sc_frmr_pg_list_len) > > - sge_count = map_read_chunks(xprt, rqstp, hdr_ctxt, rmsgp, > > - rpl_map, chl_map, ch_count, > > - byte_count); > > + /* Use FRMR if supported */ > > + if (xprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG) > > + reader = rdma_read_chunk_frmr; > > else > > - sge_count = fast_reg_read_chunks(xprt, rqstp, hdr_ctxt, > > rmsgp, > > - rpl_map, chl_map, ch_count, > > - byte_count); > > - if (sge_count < 0) { > > - err = -EIO; > > - goto out; > > - } > > - > > - sgl_offset = 0; > > - ch_no = 0; > > + reader = rdma_read_chunk_lcl; > > > > + page_no = 0; page_offset = 0; > > for (ch = (struct rpcrdma_read_chunk *)&rmsgp- > > >rm_body.rm_chunks[0]; > > - ch->rc_discrim != 0; ch++, ch_no++) { > > - u64 rs_offset; > > -next_sge: > > - ctxt = svc_rdma_get_context(xprt); > > - ctxt->direction = DMA_FROM_DEVICE; > > - ctxt->frmr = hdr_ctxt->frmr; > > - ctxt->read_hdr = NULL; > > - clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); > > - clear_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags); > > + ch->rc_discrim != 0; ch++) { > > > > - /* Prepare READ WR */ > > - memset(&read_wr, 0, sizeof read_wr); > > - read_wr.wr_id = (unsigned long)ctxt; > > - read_wr.opcode = IB_WR_RDMA_READ; > > - ctxt->wr_op = read_wr.opcode; > > - read_wr.send_flags = IB_SEND_SIGNALED; > > - read_wr.wr.rdma.rkey = ntohl(ch->rc_target.rs_handle); > > xdr_decode_hyper((__be32 *)&ch->rc_target.rs_offset, > > &rs_offset); > > - read_wr.wr.rdma.remote_addr = rs_offset + sgl_offset; > > - read_wr.sg_list = ctxt->sge; > > - read_wr.num_sge = > > - rdma_read_max_sge(xprt, chl_map- > > >ch[ch_no].count); > > - err = rdma_set_ctxt_sge(xprt, ctxt, hdr_ctxt->frmr, > > - &rpl_map->sge[chl_map- > > >ch[ch_no].start], > > - &sgl_offset, > > - read_wr.num_sge); > > - if (err) { > > - svc_rdma_unmap_dma(ctxt); > > - svc_rdma_put_context(ctxt, 0); > > - goto out; > > - } > > - if (((ch+1)->rc_discrim == 0) && > > - (read_wr.num_sge == chl_map->ch[ch_no].count)) { > > - /* > > - * Mark the last RDMA_READ with a bit to > > - * indicate all RPC data has been fetched from > > - * the client and the RPC needs to be enqueued. > > - */ > > - set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); > > - if (hdr_ctxt->frmr) { > > - set_bit(RDMACTXT_F_FAST_UNREG, &ctxt- > > >flags); > > - /* > > - * Invalidate the local MR used to map the > > data > > - * sink. > > - */ > > - if (xprt->sc_dev_caps & > > - SVCRDMA_DEVCAP_READ_W_INV) { > > - read_wr.opcode = > > - > > IB_WR_RDMA_READ_WITH_INV; > > - ctxt->wr_op = read_wr.opcode; > > - read_wr.ex.invalidate_rkey = > > - ctxt->frmr->mr->lkey; > > - } else { > > - /* Prepare INVALIDATE WR */ > > - memset(&inv_wr, 0, sizeof inv_wr); > > - inv_wr.opcode = IB_WR_LOCAL_INV; > > - inv_wr.send_flags = > > IB_SEND_SIGNALED; > > - inv_wr.ex.invalidate_rkey = > > - hdr_ctxt->frmr->mr->lkey; > > - read_wr.next = &inv_wr; > > - } > > - } > > - ctxt->read_hdr = hdr_ctxt; > > - } > > - /* Post the read */ > > - err = svc_rdma_send(xprt, &read_wr); > > - if (err) { > > - printk(KERN_ERR "svcrdma: Error %d posting > > RDMA_READ\n", > > - err); > > - set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); > > - svc_rdma_unmap_dma(ctxt); > > - svc_rdma_put_context(ctxt, 0); > > - goto out; > > + byte_count = ntohl(ch->rc_target.rs_length); > > + > > + while (byte_count > 0) { > > + ret = reader(xprt, rqstp, head, > > + &page_no, &page_offset, > > + ntohl(ch->rc_target.rs_handle), > > + byte_count, rs_offset, > > + ((ch+1)->rc_discrim == 0) /* last */ > > + ); > > + if (ret < 0) > > + goto err; > > + byte_count -= ret; > > + rs_offset += ret; > > + head->arg.buflen += ret; > > } > > - atomic_inc(&rdma_stat_read); > > - > > - if (read_wr.num_sge < chl_map->ch[ch_no].count) { > > - chl_map->ch[ch_no].count -= read_wr.num_sge; > > - chl_map->ch[ch_no].start += read_wr.num_sge; > > - goto next_sge; > > - } > > - sgl_offset = 0; > > - err = 1; > > } > > - > > - out: > > - svc_rdma_put_req_map(rpl_map); > > - svc_rdma_put_req_map(chl_map); > > - > > + ret = 1; > > + err: > > /* Detach arg pages. svc_recv will replenish them */ > > - for (ch_no = 0; &rqstp->rq_pages[ch_no] < rqstp->rq_respages; > > ch_no++) > > - rqstp->rq_pages[ch_no] = NULL; > > + for (page_no = 0; > > + &rqstp->rq_pages[page_no] < rqstp->rq_respages; page_no++) > > + rqstp->rq_pages[page_no] = NULL; > > > > - return err; > > + return ret; > > } > > > > static int rdma_read_complete(struct svc_rqst *rqstp, @@ -595,13 +504,9 > > @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) > > struct svc_rdma_op_ctxt, > > dto_q); > > list_del_init(&ctxt->dto_q); > > - } > > - if (ctxt) { > > spin_unlock_bh(&rdma_xprt->sc_rq_dto_lock); > > return rdma_read_complete(rqstp, ctxt); > > - } > > - > > - if (!list_empty(&rdma_xprt->sc_rq_dto_q)) { > > + } else if (!list_empty(&rdma_xprt->sc_rq_dto_q)) { > > ctxt = list_entry(rdma_xprt->sc_rq_dto_q.next, > > struct svc_rdma_op_ctxt, > > dto_q); > > @@ -621,7 +526,6 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) > > if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) > > goto close_out; > > > > - BUG_ON(ret); > > goto out; > > } > > dprintk("svcrdma: processing ctxt=%p on xprt=%p, rqstp=%p, > > status=%d\n", @@ -644,12 +548,11 @@ int svc_rdma_recvfrom(struct > > svc_rqst *rqstp) > > } > > > > /* Read read-list data. */ > > - ret = rdma_read_xdr(rdma_xprt, rmsgp, rqstp, ctxt); > > + ret = rdma_read_chunks(rdma_xprt, rmsgp, rqstp, ctxt); > > if (ret > 0) { > > /* read-list posted, defer until data received from client. */ > > goto defer; > > - } > > - if (ret < 0) { > > + } else if (ret < 0) { > > /* Post of read-list failed, free context. */ > > svc_rdma_put_context(ctxt, 1); > > return 0; > > diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c > > b/net/sunrpc/xprtrdma/svc_rdma_sendto.c > > index 7e024a5..49fd21a 100644 > > --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c > > +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c > > @@ -1,4 +1,5 @@ > > /* > > + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. > > * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. > > * > > * This software is available to you under a choice of one of two @@ > > -49,152 > > +50,6 @@ > > > > #define RPCDBG_FACILITY RPCDBG_SVCXPRT > > > > -/* Encode an XDR as an array of IB SGE > > - * > > - * Assumptions: > > - * - head[0] is physically contiguous. > > - * - tail[0] is physically contiguous. > > - * - pages[] is not physically or virtually contiguous and consists of > > - * PAGE_SIZE elements. > > - * > > - * Output: > > - * SGE[0] reserved for RCPRDMA header > > - * SGE[1] data from xdr->head[] > > - * SGE[2..sge_count-2] data from xdr->pages[] > > - * SGE[sge_count-1] data from xdr->tail. > > - * > > - * The max SGE we need is the length of the XDR / pagesize + one for > > - * head + one for tail + one for RPCRDMA header. Since > > RPCSVC_MAXPAGES > > - * reserves a page for both the request and the reply header, and this > > - * array is only concerned with the reply we are assured that we have > > - * on extra page for the RPCRMDA header. > > - */ > > -static int fast_reg_xdr(struct svcxprt_rdma *xprt, > > - struct xdr_buf *xdr, > > - struct svc_rdma_req_map *vec) > > -{ > > - int sge_no; > > - u32 sge_bytes; > > - u32 page_bytes; > > - u32 page_off; > > - int page_no = 0; > > - u8 *frva; > > - struct svc_rdma_fastreg_mr *frmr; > > - > > - frmr = svc_rdma_get_frmr(xprt); > > - if (IS_ERR(frmr)) > > - return -ENOMEM; > > - vec->frmr = frmr; > > - > > - /* Skip the RPCRDMA header */ > > - sge_no = 1; > > - > > - /* Map the head. */ > > - frva = (void *)((unsigned long)(xdr->head[0].iov_base) & > > PAGE_MASK); > > - vec->sge[sge_no].iov_base = xdr->head[0].iov_base; > > - vec->sge[sge_no].iov_len = xdr->head[0].iov_len; > > - vec->count = 2; > > - sge_no++; > > - > > - /* Map the XDR head */ > > - frmr->kva = frva; > > - frmr->direction = DMA_TO_DEVICE; > > - frmr->access_flags = 0; > > - frmr->map_len = PAGE_SIZE; > > - frmr->page_list_len = 1; > > - page_off = (unsigned long)xdr->head[0].iov_base & ~PAGE_MASK; > > - frmr->page_list->page_list[page_no] = > > - ib_dma_map_page(xprt->sc_cm_id->device, > > - virt_to_page(xdr->head[0].iov_base), > > - page_off, > > - PAGE_SIZE - page_off, > > - DMA_TO_DEVICE); > > - if (ib_dma_mapping_error(xprt->sc_cm_id->device, > > - frmr->page_list->page_list[page_no])) > > - goto fatal_err; > > - atomic_inc(&xprt->sc_dma_used); > > - > > - /* Map the XDR page list */ > > - page_off = xdr->page_base; > > - page_bytes = xdr->page_len + page_off; > > - if (!page_bytes) > > - goto encode_tail; > > - > > - /* Map the pages */ > > - vec->sge[sge_no].iov_base = frva + frmr->map_len + page_off; > > - vec->sge[sge_no].iov_len = page_bytes; > > - sge_no++; > > - while (page_bytes) { > > - struct page *page; > > - > > - page = xdr->pages[page_no++]; > > - sge_bytes = min_t(u32, page_bytes, (PAGE_SIZE - > > page_off)); > > - page_bytes -= sge_bytes; > > - > > - frmr->page_list->page_list[page_no] = > > - ib_dma_map_page(xprt->sc_cm_id->device, > > - page, page_off, > > - sge_bytes, DMA_TO_DEVICE); > > - if (ib_dma_mapping_error(xprt->sc_cm_id->device, > > - frmr->page_list- > > >page_list[page_no])) > > - goto fatal_err; > > - > > - atomic_inc(&xprt->sc_dma_used); > > - page_off = 0; /* reset for next time through loop */ > > - frmr->map_len += PAGE_SIZE; > > - frmr->page_list_len++; > > - } > > - vec->count++; > > - > > - encode_tail: > > - /* Map tail */ > > - if (0 == xdr->tail[0].iov_len) > > - goto done; > > - > > - vec->count++; > > - vec->sge[sge_no].iov_len = xdr->tail[0].iov_len; > > - > > - if (((unsigned long)xdr->tail[0].iov_base & PAGE_MASK) == > > - ((unsigned long)xdr->head[0].iov_base & PAGE_MASK)) { > > - /* > > - * If head and tail use the same page, we don't need > > - * to map it again. > > - */ > > - vec->sge[sge_no].iov_base = xdr->tail[0].iov_base; > > - } else { > > - void *va; > > - > > - /* Map another page for the tail */ > > - page_off = (unsigned long)xdr->tail[0].iov_base & > > ~PAGE_MASK; > > - va = (void *)((unsigned long)xdr->tail[0].iov_base & > > PAGE_MASK); > > - vec->sge[sge_no].iov_base = frva + frmr->map_len + > > page_off; > > - > > - frmr->page_list->page_list[page_no] = > > - ib_dma_map_page(xprt->sc_cm_id->device, > > virt_to_page(va), > > - page_off, > > - PAGE_SIZE, > > - DMA_TO_DEVICE); > > - if (ib_dma_mapping_error(xprt->sc_cm_id->device, > > - frmr->page_list- > > >page_list[page_no])) > > - goto fatal_err; > > - atomic_inc(&xprt->sc_dma_used); > > - frmr->map_len += PAGE_SIZE; > > - frmr->page_list_len++; > > - } > > - > > - done: > > - if (svc_rdma_fastreg(xprt, frmr)) > > - goto fatal_err; > > - > > - return 0; > > - > > - fatal_err: > > - printk("svcrdma: Error fast registering memory for xprt %p\n", xprt); > > - vec->frmr = NULL; > > - svc_rdma_put_frmr(xprt, frmr); > > - return -EIO; > > -} > > - > > static int map_xdr(struct svcxprt_rdma *xprt, > > struct xdr_buf *xdr, > > struct svc_rdma_req_map *vec) > > @@ -208,9 +63,6 @@ static int map_xdr(struct svcxprt_rdma *xprt, > > BUG_ON(xdr->len != > > (xdr->head[0].iov_len + xdr->page_len + xdr->tail[0].iov_len)); > > > > - if (xprt->sc_frmr_pg_list_len) > > - return fast_reg_xdr(xprt, xdr, vec); > > - > > /* Skip the first sge, this is for the RPCRDMA header */ > > sge_no = 1; > > > > @@ -282,8 +134,6 @@ static dma_addr_t dma_map_xdr(struct > > svcxprt_rdma *xprt, } > > > > /* Assumptions: > > - * - We are using FRMR > > - * - or - > > * - The specified write_len can be represented in sc_max_sge * PAGE_SIZE > > */ > > static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, > > @@ - > > 327,23 +177,16 @@ static int send_write(struct svcxprt_rdma *xprt, struct > > svc_rqst *rqstp, > > sge_bytes = min_t(size_t, > > bc, vec->sge[xdr_sge_no].iov_len-sge_off); > > sge[sge_no].length = sge_bytes; > > - if (!vec->frmr) { > > - sge[sge_no].addr = > > - dma_map_xdr(xprt, &rqstp->rq_res, > > xdr_off, > > - sge_bytes, DMA_TO_DEVICE); > > - xdr_off += sge_bytes; > > - if (ib_dma_mapping_error(xprt->sc_cm_id->device, > > - sge[sge_no].addr)) > > - goto err; > > - atomic_inc(&xprt->sc_dma_used); > > - sge[sge_no].lkey = xprt->sc_dma_lkey; > > - } else { > > - sge[sge_no].addr = (unsigned long) > > - vec->sge[xdr_sge_no].iov_base + sge_off; > > - sge[sge_no].lkey = vec->frmr->mr->lkey; > > - } > > + sge[sge_no].addr = > > + dma_map_xdr(xprt, &rqstp->rq_res, xdr_off, > > + sge_bytes, DMA_TO_DEVICE); > > + xdr_off += sge_bytes; > > + if (ib_dma_mapping_error(xprt->sc_cm_id->device, > > + sge[sge_no].addr)) > > + goto err; > > + atomic_inc(&xprt->sc_dma_used); > > + sge[sge_no].lkey = xprt->sc_dma_lkey; > > ctxt->count++; > > - ctxt->frmr = vec->frmr; > > sge_off = 0; > > sge_no++; > > xdr_sge_no++; > > @@ -369,7 +212,6 @@ static int send_write(struct svcxprt_rdma *xprt, struct > > svc_rqst *rqstp, > > return 0; > > err: > > svc_rdma_unmap_dma(ctxt); > > - svc_rdma_put_frmr(xprt, vec->frmr); > > svc_rdma_put_context(ctxt, 0); > > /* Fatal error, close transport */ > > return -EIO; > > @@ -397,10 +239,7 @@ static int send_write_chunks(struct svcxprt_rdma > > *xprt, > > res_ary = (struct rpcrdma_write_array *) > > &rdma_resp->rm_body.rm_chunks[1]; > > > > - if (vec->frmr) > > - max_write = vec->frmr->map_len; > > - else > > - max_write = xprt->sc_max_sge * PAGE_SIZE; > > + max_write = xprt->sc_max_sge * PAGE_SIZE; > > > > /* Write chunks start at the pagelist */ > > for (xdr_off = rqstp->rq_res.head[0].iov_len, chunk_no = 0; @@ - > > 472,10 +311,7 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, > > res_ary = (struct rpcrdma_write_array *) > > &rdma_resp->rm_body.rm_chunks[2]; > > > > - if (vec->frmr) > > - max_write = vec->frmr->map_len; > > - else > > - max_write = xprt->sc_max_sge * PAGE_SIZE; > > + max_write = xprt->sc_max_sge * PAGE_SIZE; > > > > /* xdr offset starts at RPC message */ > > nchunks = ntohl(arg_ary->wc_nchunks); > > @@ -545,7 +381,6 @@ static int send_reply(struct svcxprt_rdma *rdma, > > int byte_count) > > { > > struct ib_send_wr send_wr; > > - struct ib_send_wr inv_wr; > > int sge_no; > > int sge_bytes; > > int page_no; > > @@ -559,7 +394,6 @@ static int send_reply(struct svcxprt_rdma *rdma, > > "svcrdma: could not post a receive buffer, err=%d." > > "Closing transport %p.\n", ret, rdma); > > set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags); > > - svc_rdma_put_frmr(rdma, vec->frmr); > > svc_rdma_put_context(ctxt, 0); > > return -ENOTCONN; > > } > > @@ -567,11 +401,6 @@ static int send_reply(struct svcxprt_rdma *rdma, > > /* Prepare the context */ > > ctxt->pages[0] = page; > > ctxt->count = 1; > > - ctxt->frmr = vec->frmr; > > - if (vec->frmr) > > - set_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags); > > - else > > - clear_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags); > > > > /* Prepare the SGE for the RPCRDMA Header */ > > ctxt->sge[0].lkey = rdma->sc_dma_lkey; @@ -590,21 +419,15 @@ > > static int send_reply(struct svcxprt_rdma *rdma, > > int xdr_off = 0; > > sge_bytes = min_t(size_t, vec->sge[sge_no].iov_len, > > byte_count); > > byte_count -= sge_bytes; > > - if (!vec->frmr) { > > - ctxt->sge[sge_no].addr = > > - dma_map_xdr(rdma, &rqstp->rq_res, > > xdr_off, > > - sge_bytes, DMA_TO_DEVICE); > > - xdr_off += sge_bytes; > > - if (ib_dma_mapping_error(rdma->sc_cm_id->device, > > - ctxt->sge[sge_no].addr)) > > - goto err; > > - atomic_inc(&rdma->sc_dma_used); > > - ctxt->sge[sge_no].lkey = rdma->sc_dma_lkey; > > - } else { > > - ctxt->sge[sge_no].addr = (unsigned long) > > - vec->sge[sge_no].iov_base; > > - ctxt->sge[sge_no].lkey = vec->frmr->mr->lkey; > > - } > > + ctxt->sge[sge_no].addr = > > + dma_map_xdr(rdma, &rqstp->rq_res, xdr_off, > > + sge_bytes, DMA_TO_DEVICE); > > + xdr_off += sge_bytes; > > + if (ib_dma_mapping_error(rdma->sc_cm_id->device, > > + ctxt->sge[sge_no].addr)) > > + goto err; > > + atomic_inc(&rdma->sc_dma_used); > > + ctxt->sge[sge_no].lkey = rdma->sc_dma_lkey; > > ctxt->sge[sge_no].length = sge_bytes; > > } > > BUG_ON(byte_count != 0); > > @@ -627,6 +450,7 @@ static int send_reply(struct svcxprt_rdma *rdma, > > ctxt->sge[page_no+1].length = 0; > > } > > rqstp->rq_next_page = rqstp->rq_respages + 1; > > + > > BUG_ON(sge_no > rdma->sc_max_sge); > > memset(&send_wr, 0, sizeof send_wr); > > ctxt->wr_op = IB_WR_SEND; > > @@ -635,15 +459,6 @@ static int send_reply(struct svcxprt_rdma *rdma, > > send_wr.num_sge = sge_no; > > send_wr.opcode = IB_WR_SEND; > > send_wr.send_flags = IB_SEND_SIGNALED; > > - if (vec->frmr) { > > - /* Prepare INVALIDATE WR */ > > - memset(&inv_wr, 0, sizeof inv_wr); > > - inv_wr.opcode = IB_WR_LOCAL_INV; > > - inv_wr.send_flags = IB_SEND_SIGNALED; > > - inv_wr.ex.invalidate_rkey = > > - vec->frmr->mr->lkey; > > - send_wr.next = &inv_wr; > > - } > > > > ret = svc_rdma_send(rdma, &send_wr); > > if (ret) > > @@ -653,7 +468,6 @@ static int send_reply(struct svcxprt_rdma *rdma, > > > > err: > > svc_rdma_unmap_dma(ctxt); > > - svc_rdma_put_frmr(rdma, vec->frmr); > > svc_rdma_put_context(ctxt, 1); > > return -EIO; > > } > > diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c > > b/net/sunrpc/xprtrdma/svc_rdma_transport.c > > index 25688fa..2c5b201 100644 > > --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c > > +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c > > @@ -1,4 +1,5 @@ > > /* > > + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. > > * Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved. > > * > > * This software is available to you under a choice of one of two @@ -160,7 > > +161,6 @@ struct svc_rdma_req_map *svc_rdma_get_req_map(void) > > schedule_timeout_uninterruptible(msecs_to_jiffies(500)); > > } > > map->count = 0; > > - map->frmr = NULL; > > return map; > > } > > > > @@ -336,22 +336,21 @@ static void process_context(struct svcxprt_rdma > > *xprt, > > > > switch (ctxt->wr_op) { > > case IB_WR_SEND: > > - if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags)) > > - svc_rdma_put_frmr(xprt, ctxt->frmr); > > + BUG_ON(ctxt->frmr); > > svc_rdma_put_context(ctxt, 1); > > break; > > > > case IB_WR_RDMA_WRITE: > > + BUG_ON(ctxt->frmr); > > svc_rdma_put_context(ctxt, 0); > > break; > > > > case IB_WR_RDMA_READ: > > case IB_WR_RDMA_READ_WITH_INV: > > + svc_rdma_put_frmr(xprt, ctxt->frmr); > > if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) { > > struct svc_rdma_op_ctxt *read_hdr = ctxt- > > >read_hdr; > > BUG_ON(!read_hdr); > > - if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt- > > >flags)) > > - svc_rdma_put_frmr(xprt, ctxt->frmr); > > spin_lock_bh(&xprt->sc_rq_dto_lock); > > set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags); > > list_add_tail(&read_hdr->dto_q, > > @@ -363,6 +362,7 @@ static void process_context(struct svcxprt_rdma > > *xprt, > > break; > > > > default: > > + BUG_ON(1); > > printk(KERN_ERR "svcrdma: unexpected completion type, " > > "opcode=%d\n", > > ctxt->wr_op); > > @@ -378,29 +378,42 @@ static void process_context(struct svcxprt_rdma > > *xprt, static void sq_cq_reap(struct svcxprt_rdma *xprt) { > > struct svc_rdma_op_ctxt *ctxt = NULL; > > - struct ib_wc wc; > > + struct ib_wc wc_a[6]; > > + struct ib_wc *wc; > > struct ib_cq *cq = xprt->sc_sq_cq; > > int ret; > > > > + memset(wc_a, 0, sizeof(wc_a)); > > + > > if (!test_and_clear_bit(RDMAXPRT_SQ_PENDING, &xprt->sc_flags)) > > return; > > > > ib_req_notify_cq(xprt->sc_sq_cq, IB_CQ_NEXT_COMP); > > atomic_inc(&rdma_stat_sq_poll); > > - while ((ret = ib_poll_cq(cq, 1, &wc)) > 0) { > > - if (wc.status != IB_WC_SUCCESS) > > - /* Close the transport */ > > - set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); > > + while ((ret = ib_poll_cq(cq, ARRAY_SIZE(wc_a), wc_a)) > 0) { > > + int i; > > > > - /* Decrement used SQ WR count */ > > - atomic_dec(&xprt->sc_sq_count); > > - wake_up(&xprt->sc_send_wait); > > + for (i = 0; i < ret; i++) { > > + wc = &wc_a[i]; > > + if (wc->status != IB_WC_SUCCESS) { > > + dprintk("svcrdma: sq wc err status %d\n", > > + wc->status); > > > > - ctxt = (struct svc_rdma_op_ctxt *)(unsigned long)wc.wr_id; > > - if (ctxt) > > - process_context(xprt, ctxt); > > + /* Close the transport */ > > + set_bit(XPT_CLOSE, &xprt- > > >sc_xprt.xpt_flags); > > + } > > > > - svc_xprt_put(&xprt->sc_xprt); > > + /* Decrement used SQ WR count */ > > + atomic_dec(&xprt->sc_sq_count); > > + wake_up(&xprt->sc_send_wait); > > + > > + ctxt = (struct svc_rdma_op_ctxt *) > > + (unsigned long)wc->wr_id; > > + if (ctxt) > > + process_context(xprt, ctxt); > > + > > + svc_xprt_put(&xprt->sc_xprt); > > + } > > } > > > > if (ctxt) > > @@ -993,7 +1006,11 @@ static struct svc_xprt *svc_rdma_accept(struct > > svc_xprt *xprt) > > need_dma_mr = 0; > > break; > > case RDMA_TRANSPORT_IB: > > - if (!(devattr.device_cap_flags & > > IB_DEVICE_LOCAL_DMA_LKEY)) { > > + if (!(newxprt->sc_dev_caps & > > SVCRDMA_DEVCAP_FAST_REG)) { > > + need_dma_mr = 1; > > + dma_mr_acc = IB_ACCESS_LOCAL_WRITE; > > + } else if (!(devattr.device_cap_flags & > > + IB_DEVICE_LOCAL_DMA_LKEY)) { > > need_dma_mr = 1; > > dma_mr_acc = IB_ACCESS_LOCAL_WRITE; > > } else > > @@ -1190,14 +1207,7 @@ static int svc_rdma_has_wspace(struct svc_xprt > > *xprt) > > container_of(xprt, struct svcxprt_rdma, sc_xprt); > > > > /* > > - * If there are fewer SQ WR available than required to send a > > - * simple response, return false. > > - */ > > - if ((rdma->sc_sq_depth - atomic_read(&rdma->sc_sq_count) < 3)) > > - return 0; > > - > > - /* > > - * ...or there are already waiters on the SQ, > > + * If there are already waiters on the SQ, > > * return false. > > */ > > if (waitqueue_active(&rdma->sc_send_wait)) > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the > > body of a message to majord...@vger.kernel.org More majordomo info at > > http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
