/*
* 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/errno.h>
#include <linux/slab.h>
#include <linux/bitmap.h>
#include "pvrdma.h"
int pvrdma_page_dir_init(struct pvrdma_dev *dev, struct pvrdma_page_dir *pdir,
u64 npages, bool alloc_pages)
{
u64 i;
if (npages > PVRDMA_PAGE_DIR_MAX_PAGES)
return -EINVAL;
memset(pdir, 0, sizeof(*pdir));
pdir->dir = dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
&pdir->dir_dma, GFP_KERNEL);
if (!pdir->dir)
goto err;
pdir->ntables = PVRDMA_PAGE_DIR_TABLE(npages - 1) + 1;
pdir->tables = kcalloc(pdir->ntables, sizeof(*pdir->tables),
GFP_KERNEL);
if (!pdir->tables)
goto err;
for (i = 0; i < pdir->ntables; i++) {
pdir->tables[i] = dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
(dma_addr_t *)&pdir->dir[i],
GFP_KERNEL);
if (!pdir->tables[i])
goto err;
}
pdir->npages = npages;
if (alloc_pages) {
pdir->pages = kcalloc(npages, sizeof(*pdir->pages),
GFP_KERNEL);
if (!pdir->pages)
goto err;
for (i = 0; i < pdir->npages; i++) {
dma_addr_t page_dma;
pdir->pages[i] = dma_alloc_coherent(&dev->pdev->dev,
PAGE_SIZE,
&page_dma,
GFP_KERNEL);
if (!pdir->pages[i])
goto err;
pvrdma_page_dir_insert_dma(pdir, i, page_dma);
}
}
return 0;
err:
pvrdma_page_dir_cleanup(dev, pdir);
return -ENOMEM;
}
static u64 *pvrdma_page_dir_table(struct pvrdma_page_dir *pdir, u64 idx)
{
return pdir->tables[PVRDMA_PAGE_DIR_TABLE(idx)];
}
dma_addr_t pvrdma_page_dir_get_dma(struct pvrdma_page_dir *pdir, u64 idx)
{
return pvrdma_page_dir_table(pdir, idx)[PVRDMA_PAGE_DIR_PAGE(idx)];
}
static void pvrdma_page_dir_cleanup_pages(struct pvrdma_dev *dev,
struct pvrdma_page_dir *pdir)
{
if (pdir->pages) {
u64 i;
for (i = 0; i < pdir->npages && pdir->pages[i]; i++) {
dma_addr_t page_dma = pvrdma_page_dir_get_dma(pdir, i);
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
pdir->pages[i], page_dma);
}
kfree(pdir->pages);
}
}
static void pvrdma_page_dir_cleanup_tables(struct pvrdma_dev *dev,
struct pvrdma_page_dir *pdir)
{
if (pdir->tables) {
int i;
pvrdma_page_dir_cleanup_pages(dev, pdir);
for (i = 0; i < pdir->ntables; i++) {
u64 *table = pdir->tables[i];
if (table)
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
table, pdir->dir[i]);
}
kfree(pdir->tables);
}
}
void pvrdma_page_dir_cleanup(struct pvrdma_dev *dev,
struct pvrdma_page_dir *pdir)
{
if (pdir->dir) {
pvrdma_page_dir_cleanup_tables(dev, pdir);
dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
pdir->dir, pdir->dir_dma);
}
}
int pvrdma_page_dir_insert_dma(struct pvrdma_page_dir *pdir, u64 idx,
dma_addr_t daddr)
{
u64 *table;
if (idx >= pdir->npages)
return -EINVAL;
table = pvrdma_page_dir_table(pdir, idx);
table[PVRDMA_PAGE_DIR_PAGE(idx)] = daddr;
return 0;
}
int pvrdma_page_dir_insert_umem(struct pvrdma_page_dir *pdir,
struct ib_umem *umem, u64 offset)
{
struct ib_block_iter biter;
u64 i = offset;
int ret = 0;
if (offset >= pdir->npages)
return -EINVAL;
rdma_umem_for_each_dma_block (umem, &biter, PAGE_SIZE) {
ret = pvrdma_page_dir_insert_dma(
pdir, i, rdma_block_iter_dma_address(&biter));
if (ret)
goto exit;
i++;
}
exit:
return ret;
}
int pvrdma_page_dir_insert_page_list(struct pvrdma_page_dir *pdir,
u64 *page_list,
int num_pages)
{
int i;
int ret;
if (num_pages > pdir->npages)
return -EINVAL;
for (i = 0; i < num_pages; i++) {
ret = pvrdma_page_dir_insert_dma(pdir, i, page_list[i]);
if (ret)
return ret;
}
return 0;
}
void pvrdma_qp_cap_to_ib(struct ib_qp_cap *dst, const struct pvrdma_qp_cap *src)
{
dst->max_send_wr = src->max_send_wr;
dst->max_recv_wr = src->max_recv_wr;
dst->max_send_sge = src->max_send_sge;
dst->max_recv_sge = src->max_recv_sge;
dst->max_inline_data = src->max_inline_data;
}
void ib_qp_cap_to_pvrdma(struct pvrdma_qp_cap *dst, const struct ib_qp_cap *src)
{
dst->max_send_wr = src->max_send_wr;
dst->max_recv_wr = src->max_recv_wr;
dst->max_send_sge = src->max_send_sge;
dst->max_recv_sge = src->max_recv_sge;
dst->max_inline_data = src->max_inline_data;
}
void pvrdma_gid_to_ib(union ib_gid *dst, const union pvrdma_gid *src)
{
BUILD_BUG_ON(sizeof(union pvrdma_gid) != sizeof(union ib_gid));
memcpy(dst, src, sizeof(*src));
}
void ib_gid_to_pvrdma(union pvrdma_gid *dst, const union ib_gid *src)
{
BUILD_BUG_ON(sizeof(union pvrdma_gid) != sizeof(union ib_gid));
memcpy(dst, src, sizeof(*src));
}
void pvrdma_global_route_to_ib(struct ib_global_route *dst,
const struct pvrdma_global_route *src)
{
pvrdma_gid_to_ib(&dst->dgid, &src->dgid);
dst->flow_label = src->flow_label;
dst->sgid_index = src->sgid_index;
dst->hop_limit = src->hop_limit;
dst->traffic_class = src->traffic_class;
}
void ib_global_route_to_pvrdma(struct pvrdma_global_route *dst,
const struct ib_global_route *src)
{
ib_gid_to_pvrdma(&dst->dgid, &src->dgid);
dst->flow_label = src->flow_label;
dst->sgid_index = src->sgid_index;
dst->hop_limit = src->hop_limit;
dst->traffic_class = src->traffic_class;
}
void pvrdma_ah_attr_to_rdma(struct rdma_ah_attr *dst,
const struct pvrdma_ah_attr *src)
{
dst->type = RDMA_AH_ATTR_TYPE_ROCE;
pvrdma_global_route_to_ib(rdma_ah_retrieve_grh(dst), &src->grh);
rdma_ah_set_dlid(dst, src->dlid);
rdma_ah_set_sl(dst, src->sl);
rdma_ah_set_path_bits(dst, src->src_path_bits);
rdma_ah_set_static_rate(dst, src->static_rate);
rdma_ah_set_ah_flags(dst, src->ah_flags);
rdma_ah_set_port_num(dst, src->port_num);
memcpy(dst->roce.dmac, &src->dmac, ETH_ALEN);
}
void rdma_ah_attr_to_pvrdma(struct pvrdma_ah_attr *dst,
const struct rdma_ah_attr *src)
{
ib_global_route_to_pvrdma(&dst->grh, rdma_ah_read_grh(src));
dst->dlid = rdma_ah_get_dlid(src);
dst->sl = rdma_ah_get_sl(src);
dst->src_path_bits = rdma_ah_get_path_bits(src);
dst->static_rate = rdma_ah_get_static_rate(src);
dst->ah_flags = rdma_ah_get_ah_flags(src);
dst->port_num = rdma_ah_get_port_num(src);
memcpy(&dst->dmac, src->roce.dmac, sizeof(dst->dmac));
}
u8 ib_gid_type_to_pvrdma(enum ib_gid_type gid_type)
{
return (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ?
PVRDMA_GID_TYPE_FLAG_ROCE_V2 :
PVRDMA_GID_TYPE_FLAG_ROCE_V1;
}
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