mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-07 16:58:04 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
554
net/sunrpc/xprtrdma/svc_rdma_sendto.c
Normal file
554
net/sunrpc/xprtrdma/svc_rdma_sendto.c
Normal file
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@ -0,0 +1,554 @@
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/*
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* Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved.
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* Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
|
||||
* General Public License (GPL) Version 2, available from the file
|
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* COPYING in the main directory of this source tree, or the BSD-type
|
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
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||||
*
|
||||
* Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* Redistributions in binary form must reproduce the above
|
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* copyright notice, this list of conditions and the following
|
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* disclaimer in the documentation and/or other materials provided
|
||||
* with the distribution.
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||||
*
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||||
* Neither the name of the Network Appliance, Inc. nor the names of
|
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* its contributors may be used to endorse or promote products
|
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* derived from this software without specific prior written
|
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* permission.
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*
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||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: Tom Tucker <tom@opengridcomputing.com>
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*/
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#include <linux/sunrpc/debug.h>
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#include <linux/sunrpc/rpc_rdma.h>
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#include <linux/spinlock.h>
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#include <asm/unaligned.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_cm.h>
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#include <linux/sunrpc/svc_rdma.h>
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#define RPCDBG_FACILITY RPCDBG_SVCXPRT
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static int map_xdr(struct svcxprt_rdma *xprt,
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struct xdr_buf *xdr,
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struct svc_rdma_req_map *vec)
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{
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int sge_no;
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u32 sge_bytes;
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u32 page_bytes;
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u32 page_off;
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int page_no;
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BUG_ON(xdr->len !=
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(xdr->head[0].iov_len + xdr->page_len + xdr->tail[0].iov_len));
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/* Skip the first sge, this is for the RPCRDMA header */
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sge_no = 1;
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/* Head SGE */
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vec->sge[sge_no].iov_base = xdr->head[0].iov_base;
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vec->sge[sge_no].iov_len = xdr->head[0].iov_len;
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sge_no++;
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/* pages SGE */
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page_no = 0;
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page_bytes = xdr->page_len;
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page_off = xdr->page_base;
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while (page_bytes) {
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vec->sge[sge_no].iov_base =
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page_address(xdr->pages[page_no]) + page_off;
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sge_bytes = min_t(u32, page_bytes, (PAGE_SIZE - page_off));
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page_bytes -= sge_bytes;
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vec->sge[sge_no].iov_len = sge_bytes;
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sge_no++;
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page_no++;
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page_off = 0; /* reset for next time through loop */
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}
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/* Tail SGE */
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if (xdr->tail[0].iov_len) {
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vec->sge[sge_no].iov_base = xdr->tail[0].iov_base;
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vec->sge[sge_no].iov_len = xdr->tail[0].iov_len;
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sge_no++;
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}
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dprintk("svcrdma: map_xdr: sge_no %d page_no %d "
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"page_base %u page_len %u head_len %zu tail_len %zu\n",
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sge_no, page_no, xdr->page_base, xdr->page_len,
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xdr->head[0].iov_len, xdr->tail[0].iov_len);
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vec->count = sge_no;
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return 0;
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}
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static dma_addr_t dma_map_xdr(struct svcxprt_rdma *xprt,
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struct xdr_buf *xdr,
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u32 xdr_off, size_t len, int dir)
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{
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struct page *page;
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dma_addr_t dma_addr;
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if (xdr_off < xdr->head[0].iov_len) {
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/* This offset is in the head */
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xdr_off += (unsigned long)xdr->head[0].iov_base & ~PAGE_MASK;
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page = virt_to_page(xdr->head[0].iov_base);
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} else {
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xdr_off -= xdr->head[0].iov_len;
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if (xdr_off < xdr->page_len) {
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/* This offset is in the page list */
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xdr_off += xdr->page_base;
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page = xdr->pages[xdr_off >> PAGE_SHIFT];
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xdr_off &= ~PAGE_MASK;
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} else {
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/* This offset is in the tail */
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xdr_off -= xdr->page_len;
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xdr_off += (unsigned long)
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xdr->tail[0].iov_base & ~PAGE_MASK;
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page = virt_to_page(xdr->tail[0].iov_base);
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}
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}
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dma_addr = ib_dma_map_page(xprt->sc_cm_id->device, page, xdr_off,
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min_t(size_t, PAGE_SIZE, len), dir);
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return dma_addr;
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}
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/* Assumptions:
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* - The specified write_len can be represented in sc_max_sge * PAGE_SIZE
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*/
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static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp,
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u32 rmr, u64 to,
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u32 xdr_off, int write_len,
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struct svc_rdma_req_map *vec)
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{
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struct ib_send_wr write_wr;
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struct ib_sge *sge;
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int xdr_sge_no;
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int sge_no;
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int sge_bytes;
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int sge_off;
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int bc;
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struct svc_rdma_op_ctxt *ctxt;
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BUG_ON(vec->count > RPCSVC_MAXPAGES);
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dprintk("svcrdma: RDMA_WRITE rmr=%x, to=%llx, xdr_off=%d, "
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"write_len=%d, vec->sge=%p, vec->count=%lu\n",
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rmr, (unsigned long long)to, xdr_off,
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write_len, vec->sge, vec->count);
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ctxt = svc_rdma_get_context(xprt);
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ctxt->direction = DMA_TO_DEVICE;
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sge = ctxt->sge;
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/* Find the SGE associated with xdr_off */
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for (bc = xdr_off, xdr_sge_no = 1; bc && xdr_sge_no < vec->count;
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xdr_sge_no++) {
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if (vec->sge[xdr_sge_no].iov_len > bc)
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break;
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bc -= vec->sge[xdr_sge_no].iov_len;
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}
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sge_off = bc;
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bc = write_len;
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sge_no = 0;
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/* Copy the remaining SGE */
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while (bc != 0) {
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sge_bytes = min_t(size_t,
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bc, vec->sge[xdr_sge_no].iov_len-sge_off);
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sge[sge_no].length = sge_bytes;
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sge[sge_no].addr =
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dma_map_xdr(xprt, &rqstp->rq_res, xdr_off,
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sge_bytes, DMA_TO_DEVICE);
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xdr_off += sge_bytes;
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if (ib_dma_mapping_error(xprt->sc_cm_id->device,
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sge[sge_no].addr))
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goto err;
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atomic_inc(&xprt->sc_dma_used);
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sge[sge_no].lkey = xprt->sc_dma_lkey;
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ctxt->count++;
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sge_off = 0;
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sge_no++;
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xdr_sge_no++;
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BUG_ON(xdr_sge_no > vec->count);
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bc -= sge_bytes;
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if (sge_no == xprt->sc_max_sge)
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break;
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}
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/* Prepare WRITE WR */
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memset(&write_wr, 0, sizeof write_wr);
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ctxt->wr_op = IB_WR_RDMA_WRITE;
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write_wr.wr_id = (unsigned long)ctxt;
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write_wr.sg_list = &sge[0];
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write_wr.num_sge = sge_no;
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write_wr.opcode = IB_WR_RDMA_WRITE;
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write_wr.send_flags = IB_SEND_SIGNALED;
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write_wr.wr.rdma.rkey = rmr;
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write_wr.wr.rdma.remote_addr = to;
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/* Post It */
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atomic_inc(&rdma_stat_write);
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if (svc_rdma_send(xprt, &write_wr))
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goto err;
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return write_len - bc;
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err:
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svc_rdma_unmap_dma(ctxt);
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svc_rdma_put_context(ctxt, 0);
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/* Fatal error, close transport */
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return -EIO;
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}
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static int send_write_chunks(struct svcxprt_rdma *xprt,
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struct rpcrdma_msg *rdma_argp,
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struct rpcrdma_msg *rdma_resp,
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struct svc_rqst *rqstp,
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struct svc_rdma_req_map *vec)
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{
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u32 xfer_len = rqstp->rq_res.page_len + rqstp->rq_res.tail[0].iov_len;
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int write_len;
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u32 xdr_off;
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int chunk_off;
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int chunk_no;
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struct rpcrdma_write_array *arg_ary;
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struct rpcrdma_write_array *res_ary;
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int ret;
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arg_ary = svc_rdma_get_write_array(rdma_argp);
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if (!arg_ary)
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return 0;
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res_ary = (struct rpcrdma_write_array *)
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&rdma_resp->rm_body.rm_chunks[1];
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/* Write chunks start at the pagelist */
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for (xdr_off = rqstp->rq_res.head[0].iov_len, chunk_no = 0;
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xfer_len && chunk_no < arg_ary->wc_nchunks;
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chunk_no++) {
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struct rpcrdma_segment *arg_ch;
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u64 rs_offset;
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arg_ch = &arg_ary->wc_array[chunk_no].wc_target;
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write_len = min(xfer_len, ntohl(arg_ch->rs_length));
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/* Prepare the response chunk given the length actually
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* written */
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xdr_decode_hyper((__be32 *)&arg_ch->rs_offset, &rs_offset);
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svc_rdma_xdr_encode_array_chunk(res_ary, chunk_no,
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arg_ch->rs_handle,
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arg_ch->rs_offset,
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write_len);
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chunk_off = 0;
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while (write_len) {
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ret = send_write(xprt, rqstp,
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ntohl(arg_ch->rs_handle),
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rs_offset + chunk_off,
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xdr_off,
|
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write_len,
|
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vec);
|
||||
if (ret <= 0) {
|
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dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n",
|
||||
ret);
|
||||
return -EIO;
|
||||
}
|
||||
chunk_off += ret;
|
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xdr_off += ret;
|
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xfer_len -= ret;
|
||||
write_len -= ret;
|
||||
}
|
||||
}
|
||||
/* Update the req with the number of chunks actually used */
|
||||
svc_rdma_xdr_encode_write_list(rdma_resp, chunk_no);
|
||||
|
||||
return rqstp->rq_res.page_len + rqstp->rq_res.tail[0].iov_len;
|
||||
}
|
||||
|
||||
static int send_reply_chunks(struct svcxprt_rdma *xprt,
|
||||
struct rpcrdma_msg *rdma_argp,
|
||||
struct rpcrdma_msg *rdma_resp,
|
||||
struct svc_rqst *rqstp,
|
||||
struct svc_rdma_req_map *vec)
|
||||
{
|
||||
u32 xfer_len = rqstp->rq_res.len;
|
||||
int write_len;
|
||||
u32 xdr_off;
|
||||
int chunk_no;
|
||||
int chunk_off;
|
||||
int nchunks;
|
||||
struct rpcrdma_segment *ch;
|
||||
struct rpcrdma_write_array *arg_ary;
|
||||
struct rpcrdma_write_array *res_ary;
|
||||
int ret;
|
||||
|
||||
arg_ary = svc_rdma_get_reply_array(rdma_argp);
|
||||
if (!arg_ary)
|
||||
return 0;
|
||||
/* XXX: need to fix when reply lists occur with read-list and or
|
||||
* write-list */
|
||||
res_ary = (struct rpcrdma_write_array *)
|
||||
&rdma_resp->rm_body.rm_chunks[2];
|
||||
|
||||
/* xdr offset starts at RPC message */
|
||||
nchunks = ntohl(arg_ary->wc_nchunks);
|
||||
for (xdr_off = 0, chunk_no = 0;
|
||||
xfer_len && chunk_no < nchunks;
|
||||
chunk_no++) {
|
||||
u64 rs_offset;
|
||||
ch = &arg_ary->wc_array[chunk_no].wc_target;
|
||||
write_len = min(xfer_len, htonl(ch->rs_length));
|
||||
|
||||
/* Prepare the reply chunk given the length actually
|
||||
* written */
|
||||
xdr_decode_hyper((__be32 *)&ch->rs_offset, &rs_offset);
|
||||
svc_rdma_xdr_encode_array_chunk(res_ary, chunk_no,
|
||||
ch->rs_handle, ch->rs_offset,
|
||||
write_len);
|
||||
chunk_off = 0;
|
||||
while (write_len) {
|
||||
ret = send_write(xprt, rqstp,
|
||||
ntohl(ch->rs_handle),
|
||||
rs_offset + chunk_off,
|
||||
xdr_off,
|
||||
write_len,
|
||||
vec);
|
||||
if (ret <= 0) {
|
||||
dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n",
|
||||
ret);
|
||||
return -EIO;
|
||||
}
|
||||
chunk_off += ret;
|
||||
xdr_off += ret;
|
||||
xfer_len -= ret;
|
||||
write_len -= ret;
|
||||
}
|
||||
}
|
||||
/* Update the req with the number of chunks actually used */
|
||||
svc_rdma_xdr_encode_reply_array(res_ary, chunk_no);
|
||||
|
||||
return rqstp->rq_res.len;
|
||||
}
|
||||
|
||||
/* This function prepares the portion of the RPCRDMA message to be
|
||||
* sent in the RDMA_SEND. This function is called after data sent via
|
||||
* RDMA has already been transmitted. There are three cases:
|
||||
* - The RPCRDMA header, RPC header, and payload are all sent in a
|
||||
* single RDMA_SEND. This is the "inline" case.
|
||||
* - The RPCRDMA header and some portion of the RPC header and data
|
||||
* are sent via this RDMA_SEND and another portion of the data is
|
||||
* sent via RDMA.
|
||||
* - The RPCRDMA header [NOMSG] is sent in this RDMA_SEND and the RPC
|
||||
* header and data are all transmitted via RDMA.
|
||||
* In all three cases, this function prepares the RPCRDMA header in
|
||||
* sge[0], the 'type' parameter indicates the type to place in the
|
||||
* RPCRDMA header, and the 'byte_count' field indicates how much of
|
||||
* the XDR to include in this RDMA_SEND. NB: The offset of the payload
|
||||
* to send is zero in the XDR.
|
||||
*/
|
||||
static int send_reply(struct svcxprt_rdma *rdma,
|
||||
struct svc_rqst *rqstp,
|
||||
struct page *page,
|
||||
struct rpcrdma_msg *rdma_resp,
|
||||
struct svc_rdma_op_ctxt *ctxt,
|
||||
struct svc_rdma_req_map *vec,
|
||||
int byte_count)
|
||||
{
|
||||
struct ib_send_wr send_wr;
|
||||
int sge_no;
|
||||
int sge_bytes;
|
||||
int page_no;
|
||||
int pages;
|
||||
int ret;
|
||||
|
||||
/* Post a recv buffer to handle another request. */
|
||||
ret = svc_rdma_post_recv(rdma);
|
||||
if (ret) {
|
||||
printk(KERN_INFO
|
||||
"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_context(ctxt, 0);
|
||||
return -ENOTCONN;
|
||||
}
|
||||
|
||||
/* Prepare the context */
|
||||
ctxt->pages[0] = page;
|
||||
ctxt->count = 1;
|
||||
|
||||
/* Prepare the SGE for the RPCRDMA Header */
|
||||
ctxt->sge[0].lkey = rdma->sc_dma_lkey;
|
||||
ctxt->sge[0].length = svc_rdma_xdr_get_reply_hdr_len(rdma_resp);
|
||||
ctxt->sge[0].addr =
|
||||
ib_dma_map_page(rdma->sc_cm_id->device, page, 0,
|
||||
ctxt->sge[0].length, DMA_TO_DEVICE);
|
||||
if (ib_dma_mapping_error(rdma->sc_cm_id->device, ctxt->sge[0].addr))
|
||||
goto err;
|
||||
atomic_inc(&rdma->sc_dma_used);
|
||||
|
||||
ctxt->direction = DMA_TO_DEVICE;
|
||||
|
||||
/* Map the payload indicated by 'byte_count' */
|
||||
for (sge_no = 1; byte_count && sge_no < vec->count; sge_no++) {
|
||||
int xdr_off = 0;
|
||||
sge_bytes = min_t(size_t, vec->sge[sge_no].iov_len, byte_count);
|
||||
byte_count -= sge_bytes;
|
||||
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);
|
||||
|
||||
/* Save all respages in the ctxt and remove them from the
|
||||
* respages array. They are our pages until the I/O
|
||||
* completes.
|
||||
*/
|
||||
pages = rqstp->rq_next_page - rqstp->rq_respages;
|
||||
for (page_no = 0; page_no < pages; page_no++) {
|
||||
ctxt->pages[page_no+1] = rqstp->rq_respages[page_no];
|
||||
ctxt->count++;
|
||||
rqstp->rq_respages[page_no] = NULL;
|
||||
/*
|
||||
* If there are more pages than SGE, terminate SGE
|
||||
* list so that svc_rdma_unmap_dma doesn't attempt to
|
||||
* unmap garbage.
|
||||
*/
|
||||
if (page_no+1 >= sge_no)
|
||||
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;
|
||||
send_wr.wr_id = (unsigned long)ctxt;
|
||||
send_wr.sg_list = ctxt->sge;
|
||||
send_wr.num_sge = sge_no;
|
||||
send_wr.opcode = IB_WR_SEND;
|
||||
send_wr.send_flags = IB_SEND_SIGNALED;
|
||||
|
||||
ret = svc_rdma_send(rdma, &send_wr);
|
||||
if (ret)
|
||||
goto err;
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
svc_rdma_unmap_dma(ctxt);
|
||||
svc_rdma_put_context(ctxt, 1);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
void svc_rdma_prep_reply_hdr(struct svc_rqst *rqstp)
|
||||
{
|
||||
}
|
||||
|
||||
/*
|
||||
* Return the start of an xdr buffer.
|
||||
*/
|
||||
static void *xdr_start(struct xdr_buf *xdr)
|
||||
{
|
||||
return xdr->head[0].iov_base -
|
||||
(xdr->len -
|
||||
xdr->page_len -
|
||||
xdr->tail[0].iov_len -
|
||||
xdr->head[0].iov_len);
|
||||
}
|
||||
|
||||
int svc_rdma_sendto(struct svc_rqst *rqstp)
|
||||
{
|
||||
struct svc_xprt *xprt = rqstp->rq_xprt;
|
||||
struct svcxprt_rdma *rdma =
|
||||
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
||||
struct rpcrdma_msg *rdma_argp;
|
||||
struct rpcrdma_msg *rdma_resp;
|
||||
struct rpcrdma_write_array *reply_ary;
|
||||
enum rpcrdma_proc reply_type;
|
||||
int ret;
|
||||
int inline_bytes;
|
||||
struct page *res_page;
|
||||
struct svc_rdma_op_ctxt *ctxt;
|
||||
struct svc_rdma_req_map *vec;
|
||||
|
||||
dprintk("svcrdma: sending response for rqstp=%p\n", rqstp);
|
||||
|
||||
/* Get the RDMA request header. */
|
||||
rdma_argp = xdr_start(&rqstp->rq_arg);
|
||||
|
||||
/* Build an req vec for the XDR */
|
||||
ctxt = svc_rdma_get_context(rdma);
|
||||
ctxt->direction = DMA_TO_DEVICE;
|
||||
vec = svc_rdma_get_req_map();
|
||||
ret = map_xdr(rdma, &rqstp->rq_res, vec);
|
||||
if (ret)
|
||||
goto err0;
|
||||
inline_bytes = rqstp->rq_res.len;
|
||||
|
||||
/* Create the RDMA response header */
|
||||
res_page = svc_rdma_get_page();
|
||||
rdma_resp = page_address(res_page);
|
||||
reply_ary = svc_rdma_get_reply_array(rdma_argp);
|
||||
if (reply_ary)
|
||||
reply_type = RDMA_NOMSG;
|
||||
else
|
||||
reply_type = RDMA_MSG;
|
||||
svc_rdma_xdr_encode_reply_header(rdma, rdma_argp,
|
||||
rdma_resp, reply_type);
|
||||
|
||||
/* Send any write-chunk data and build resp write-list */
|
||||
ret = send_write_chunks(rdma, rdma_argp, rdma_resp,
|
||||
rqstp, vec);
|
||||
if (ret < 0) {
|
||||
printk(KERN_ERR "svcrdma: failed to send write chunks, rc=%d\n",
|
||||
ret);
|
||||
goto err1;
|
||||
}
|
||||
inline_bytes -= ret;
|
||||
|
||||
/* Send any reply-list data and update resp reply-list */
|
||||
ret = send_reply_chunks(rdma, rdma_argp, rdma_resp,
|
||||
rqstp, vec);
|
||||
if (ret < 0) {
|
||||
printk(KERN_ERR "svcrdma: failed to send reply chunks, rc=%d\n",
|
||||
ret);
|
||||
goto err1;
|
||||
}
|
||||
inline_bytes -= ret;
|
||||
|
||||
ret = send_reply(rdma, rqstp, res_page, rdma_resp, ctxt, vec,
|
||||
inline_bytes);
|
||||
svc_rdma_put_req_map(vec);
|
||||
dprintk("svcrdma: send_reply returns %d\n", ret);
|
||||
return ret;
|
||||
|
||||
err1:
|
||||
put_page(res_page);
|
||||
err0:
|
||||
svc_rdma_put_req_map(vec);
|
||||
svc_rdma_put_context(ctxt, 0);
|
||||
return ret;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue