forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
327 lines
8.9 KiB
327 lines
8.9 KiB
/* |
|
* Copyright (c) 2012-2016 VMware, Inc. All rights reserved. |
|
* |
|
* This program is free software; you can redistribute it and/or |
|
* modify it under the terms of EITHER the GNU General Public License |
|
* version 2 as published by the Free Software Foundation or the BSD |
|
* 2-Clause License. This program is distributed in the hope that it |
|
* will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED |
|
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
|
* See the GNU General Public License version 2 for more details at |
|
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. |
|
* |
|
* You should have received a copy of the GNU General Public License |
|
* along with this program available in the file COPYING in the main |
|
* directory of this source tree. |
|
* |
|
* The BSD 2-Clause License |
|
* |
|
* Redistribution and use in source and binary forms, with or |
|
* without modification, are permitted provided that the following |
|
* conditions are met: |
|
* |
|
* - 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 |
|
* copyright notice, this list of conditions and the following |
|
* disclaimer in the documentation and/or other materials |
|
* provided with the distribution. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
|
* OF THE POSSIBILITY OF SUCH DAMAGE. |
|
*/ |
|
|
|
#include <linux/list.h> |
|
#include <linux/slab.h> |
|
|
|
#include "pvrdma.h" |
|
|
|
/** |
|
* pvrdma_get_dma_mr - get a DMA memory region |
|
* @pd: protection domain |
|
* @acc: access flags |
|
* |
|
* @return: ib_mr pointer on success, otherwise returns an errno. |
|
*/ |
|
struct ib_mr *pvrdma_get_dma_mr(struct ib_pd *pd, int acc) |
|
{ |
|
struct pvrdma_dev *dev = to_vdev(pd->device); |
|
struct pvrdma_user_mr *mr; |
|
union pvrdma_cmd_req req; |
|
union pvrdma_cmd_resp rsp; |
|
struct pvrdma_cmd_create_mr *cmd = &req.create_mr; |
|
struct pvrdma_cmd_create_mr_resp *resp = &rsp.create_mr_resp; |
|
int ret; |
|
|
|
/* Support only LOCAL_WRITE flag for DMA MRs */ |
|
if (acc & ~IB_ACCESS_LOCAL_WRITE) { |
|
dev_warn(&dev->pdev->dev, |
|
"unsupported dma mr access flags %#x\n", acc); |
|
return ERR_PTR(-EOPNOTSUPP); |
|
} |
|
|
|
mr = kzalloc(sizeof(*mr), GFP_KERNEL); |
|
if (!mr) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
memset(cmd, 0, sizeof(*cmd)); |
|
cmd->hdr.cmd = PVRDMA_CMD_CREATE_MR; |
|
cmd->pd_handle = to_vpd(pd)->pd_handle; |
|
cmd->access_flags = acc; |
|
cmd->flags = PVRDMA_MR_FLAG_DMA; |
|
|
|
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_MR_RESP); |
|
if (ret < 0) { |
|
dev_warn(&dev->pdev->dev, |
|
"could not get DMA mem region, error: %d\n", ret); |
|
kfree(mr); |
|
return ERR_PTR(ret); |
|
} |
|
|
|
mr->mmr.mr_handle = resp->mr_handle; |
|
mr->ibmr.lkey = resp->lkey; |
|
mr->ibmr.rkey = resp->rkey; |
|
|
|
return &mr->ibmr; |
|
} |
|
|
|
/** |
|
* pvrdma_reg_user_mr - register a userspace memory region |
|
* @pd: protection domain |
|
* @start: starting address |
|
* @length: length of region |
|
* @virt_addr: I/O virtual address |
|
* @access_flags: access flags for memory region |
|
* @udata: user data |
|
* |
|
* @return: ib_mr pointer on success, otherwise returns an errno. |
|
*/ |
|
struct ib_mr *pvrdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, |
|
u64 virt_addr, int access_flags, |
|
struct ib_udata *udata) |
|
{ |
|
struct pvrdma_dev *dev = to_vdev(pd->device); |
|
struct pvrdma_user_mr *mr = NULL; |
|
struct ib_umem *umem; |
|
union pvrdma_cmd_req req; |
|
union pvrdma_cmd_resp rsp; |
|
struct pvrdma_cmd_create_mr *cmd = &req.create_mr; |
|
struct pvrdma_cmd_create_mr_resp *resp = &rsp.create_mr_resp; |
|
int ret, npages; |
|
|
|
if (length == 0 || length > dev->dsr->caps.max_mr_size) { |
|
dev_warn(&dev->pdev->dev, "invalid mem region length\n"); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
umem = ib_umem_get(pd->device, start, length, access_flags); |
|
if (IS_ERR(umem)) { |
|
dev_warn(&dev->pdev->dev, |
|
"could not get umem for mem region\n"); |
|
return ERR_CAST(umem); |
|
} |
|
|
|
npages = ib_umem_num_dma_blocks(umem, PAGE_SIZE); |
|
if (npages < 0 || npages > PVRDMA_PAGE_DIR_MAX_PAGES) { |
|
dev_warn(&dev->pdev->dev, "overflow %d pages in mem region\n", |
|
npages); |
|
ret = -EINVAL; |
|
goto err_umem; |
|
} |
|
|
|
mr = kzalloc(sizeof(*mr), GFP_KERNEL); |
|
if (!mr) { |
|
ret = -ENOMEM; |
|
goto err_umem; |
|
} |
|
|
|
mr->mmr.iova = virt_addr; |
|
mr->mmr.size = length; |
|
mr->umem = umem; |
|
|
|
ret = pvrdma_page_dir_init(dev, &mr->pdir, npages, false); |
|
if (ret) { |
|
dev_warn(&dev->pdev->dev, |
|
"could not allocate page directory\n"); |
|
goto err_umem; |
|
} |
|
|
|
ret = pvrdma_page_dir_insert_umem(&mr->pdir, mr->umem, 0); |
|
if (ret) |
|
goto err_pdir; |
|
|
|
memset(cmd, 0, sizeof(*cmd)); |
|
cmd->hdr.cmd = PVRDMA_CMD_CREATE_MR; |
|
cmd->start = start; |
|
cmd->length = length; |
|
cmd->pd_handle = to_vpd(pd)->pd_handle; |
|
cmd->access_flags = access_flags; |
|
cmd->nchunks = npages; |
|
cmd->pdir_dma = mr->pdir.dir_dma; |
|
|
|
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_MR_RESP); |
|
if (ret < 0) { |
|
dev_warn(&dev->pdev->dev, |
|
"could not register mem region, error: %d\n", ret); |
|
goto err_pdir; |
|
} |
|
|
|
mr->mmr.mr_handle = resp->mr_handle; |
|
mr->ibmr.lkey = resp->lkey; |
|
mr->ibmr.rkey = resp->rkey; |
|
|
|
return &mr->ibmr; |
|
|
|
err_pdir: |
|
pvrdma_page_dir_cleanup(dev, &mr->pdir); |
|
err_umem: |
|
ib_umem_release(umem); |
|
kfree(mr); |
|
|
|
return ERR_PTR(ret); |
|
} |
|
|
|
/** |
|
* pvrdma_alloc_mr - allocate a memory region |
|
* @pd: protection domain |
|
* @mr_type: type of memory region |
|
* @max_num_sg: maximum number of pages |
|
* |
|
* @return: ib_mr pointer on success, otherwise returns an errno. |
|
*/ |
|
struct ib_mr *pvrdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, |
|
u32 max_num_sg) |
|
{ |
|
struct pvrdma_dev *dev = to_vdev(pd->device); |
|
struct pvrdma_user_mr *mr; |
|
union pvrdma_cmd_req req; |
|
union pvrdma_cmd_resp rsp; |
|
struct pvrdma_cmd_create_mr *cmd = &req.create_mr; |
|
struct pvrdma_cmd_create_mr_resp *resp = &rsp.create_mr_resp; |
|
int size = max_num_sg * sizeof(u64); |
|
int ret; |
|
|
|
if (mr_type != IB_MR_TYPE_MEM_REG || |
|
max_num_sg > PVRDMA_MAX_FAST_REG_PAGES) |
|
return ERR_PTR(-EINVAL); |
|
|
|
mr = kzalloc(sizeof(*mr), GFP_KERNEL); |
|
if (!mr) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
mr->pages = kzalloc(size, GFP_KERNEL); |
|
if (!mr->pages) { |
|
ret = -ENOMEM; |
|
goto freemr; |
|
} |
|
|
|
ret = pvrdma_page_dir_init(dev, &mr->pdir, max_num_sg, false); |
|
if (ret) { |
|
dev_warn(&dev->pdev->dev, |
|
"failed to allocate page dir for mr\n"); |
|
ret = -ENOMEM; |
|
goto freepages; |
|
} |
|
|
|
memset(cmd, 0, sizeof(*cmd)); |
|
cmd->hdr.cmd = PVRDMA_CMD_CREATE_MR; |
|
cmd->pd_handle = to_vpd(pd)->pd_handle; |
|
cmd->access_flags = 0; |
|
cmd->flags = PVRDMA_MR_FLAG_FRMR; |
|
cmd->nchunks = max_num_sg; |
|
|
|
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_MR_RESP); |
|
if (ret < 0) { |
|
dev_warn(&dev->pdev->dev, |
|
"could not create FR mem region, error: %d\n", ret); |
|
goto freepdir; |
|
} |
|
|
|
mr->max_pages = max_num_sg; |
|
mr->mmr.mr_handle = resp->mr_handle; |
|
mr->ibmr.lkey = resp->lkey; |
|
mr->ibmr.rkey = resp->rkey; |
|
mr->page_shift = PAGE_SHIFT; |
|
mr->umem = NULL; |
|
|
|
return &mr->ibmr; |
|
|
|
freepdir: |
|
pvrdma_page_dir_cleanup(dev, &mr->pdir); |
|
freepages: |
|
kfree(mr->pages); |
|
freemr: |
|
kfree(mr); |
|
return ERR_PTR(ret); |
|
} |
|
|
|
/** |
|
* pvrdma_dereg_mr - deregister a memory region |
|
* @ibmr: memory region |
|
* @udata: pointer to user data |
|
* |
|
* @return: 0 on success. |
|
*/ |
|
int pvrdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) |
|
{ |
|
struct pvrdma_user_mr *mr = to_vmr(ibmr); |
|
struct pvrdma_dev *dev = to_vdev(ibmr->device); |
|
union pvrdma_cmd_req req; |
|
struct pvrdma_cmd_destroy_mr *cmd = &req.destroy_mr; |
|
int ret; |
|
|
|
memset(cmd, 0, sizeof(*cmd)); |
|
cmd->hdr.cmd = PVRDMA_CMD_DESTROY_MR; |
|
cmd->mr_handle = mr->mmr.mr_handle; |
|
ret = pvrdma_cmd_post(dev, &req, NULL, 0); |
|
if (ret < 0) |
|
dev_warn(&dev->pdev->dev, |
|
"could not deregister mem region, error: %d\n", ret); |
|
|
|
pvrdma_page_dir_cleanup(dev, &mr->pdir); |
|
ib_umem_release(mr->umem); |
|
|
|
kfree(mr->pages); |
|
kfree(mr); |
|
|
|
return 0; |
|
} |
|
|
|
static int pvrdma_set_page(struct ib_mr *ibmr, u64 addr) |
|
{ |
|
struct pvrdma_user_mr *mr = to_vmr(ibmr); |
|
|
|
if (mr->npages == mr->max_pages) |
|
return -ENOMEM; |
|
|
|
mr->pages[mr->npages++] = addr; |
|
return 0; |
|
} |
|
|
|
int pvrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, |
|
unsigned int *sg_offset) |
|
{ |
|
struct pvrdma_user_mr *mr = to_vmr(ibmr); |
|
struct pvrdma_dev *dev = to_vdev(ibmr->device); |
|
int ret; |
|
|
|
mr->npages = 0; |
|
|
|
ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, pvrdma_set_page); |
|
if (ret < 0) |
|
dev_warn(&dev->pdev->dev, "could not map sg to pages\n"); |
|
|
|
return ret; |
|
}
|
|
|