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/*
* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "mlx4_ib.h"
static u32 convert_access(int acc)
{
return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) |
(acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) |
(acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) |
(acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) |
MLX4_PERM_LOCAL_READ;
}
struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
{
struct mlx4_ib_mr *mr;
int err;
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
~0ull, convert_access(acc), 0, 0, &mr->mmr);
if (err)
goto err_free;
err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
if (err)
goto err_mr;
mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
mr->umem = NULL;
return &mr->ibmr;
err_mr:
mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
err_free:
kfree(mr);
return ERR_PTR(err);
}
int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
struct ib_umem *umem)
{
u64 *pages;
struct ib_umem_chunk *chunk;
int i, j, k;
int n;
int len;
int err = 0;
pages = (u64 *) __get_free_page(GFP_KERNEL);
if (!pages)
return -ENOMEM;
i = n = 0;
list_for_each_entry(chunk, &umem->chunk_list, list)
for (j = 0; j < chunk->nmap; ++j) {
len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
for (k = 0; k < len; ++k) {
pages[i++] = sg_dma_address(&chunk->page_list[j]) +
umem->page_size * k;
/*
* Be friendly to mlx4_write_mtt() and
* pass it chunks of appropriate size.
*/
if (i == PAGE_SIZE / sizeof (u64)) {
err = mlx4_write_mtt(dev->dev, mtt, n,
i, pages);
if (err)
goto out;
n += i;
i = 0;
}
}
}
if (i)
err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
out:
free_page((unsigned long) pages);
return err;
}
static int handle_hugetlb_user_mr(struct ib_pd *pd, struct mlx4_ib_mr *mr,
u64 start, u64 virt_addr, int access_flags)
{
#if defined(CONFIG_HUGETLB_PAGE) && !defined(__powerpc__) && !defined(__ia64__)
struct mlx4_ib_dev *dev = to_mdev(pd->device);
struct ib_umem_chunk *chunk;
unsigned dsize;
dma_addr_t daddr;
unsigned cur_size = 0;
dma_addr_t uninitialized_var(cur_addr);
int n;
struct ib_umem *umem = mr->umem;
u64 *arr;
int err = 0;
int i;
int j = 0;
int off = start & (HPAGE_SIZE - 1);
n = DIV_ROUND_UP(off + umem->length, HPAGE_SIZE);
arr = kmalloc(n * sizeof *arr, GFP_KERNEL);
if (!arr)
return -ENOMEM;
list_for_each_entry(chunk, &umem->chunk_list, list)
for (i = 0; i < chunk->nmap; ++i) {
daddr = sg_dma_address(&chunk->page_list[i]);
dsize = sg_dma_len(&chunk->page_list[i]);
if (!cur_size) {
cur_addr = daddr;
cur_size = dsize;
} else if (cur_addr + cur_size != daddr) {
err = -EINVAL;
goto out;
} else
cur_size += dsize;
if (cur_size > HPAGE_SIZE) {
err = -EINVAL;
goto out;
} else if (cur_size == HPAGE_SIZE) {
cur_size = 0;
arr[j++] = cur_addr;
}
}
if (cur_size) {
arr[j++] = cur_addr;
}
err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, umem->length,
convert_access(access_flags), n, HPAGE_SHIFT, &mr->mmr);
if (err)
goto out;
err = mlx4_write_mtt(dev->dev, &mr->mmr.mtt, 0, n, arr);
out:
kfree(arr);
return err;
#else
return -ENOSYS;
#endif
}
struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt_addr, int access_flags,
struct ib_udata *udata)
{
struct mlx4_ib_dev *dev = to_mdev(pd->device);
struct mlx4_ib_mr *mr;
int shift;
int err;
int n;
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
mr->umem = ib_umem_get(pd->uobject->context, start, length,
access_flags, 0);
if (IS_ERR(mr->umem)) {
err = PTR_ERR(mr->umem);
goto err_free;
}
if (!mr->umem->hugetlb ||
handle_hugetlb_user_mr(pd, mr, start, virt_addr, access_flags)) {
n = ib_umem_page_count(mr->umem);
shift = ilog2(mr->umem->page_size);
err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
convert_access(access_flags), n, shift, &mr->mmr);
if (err)
goto err_umem;
err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
if (err)
goto err_mr;
}
err = mlx4_mr_enable(dev->dev, &mr->mmr);
if (err)
goto err_mr;
mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
return &mr->ibmr;
err_mr:
mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
err_umem:
ib_umem_release(mr->umem);
err_free:
kfree(mr);
return ERR_PTR(err);
}
int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
{
struct mlx4_ib_mr *mr = to_mmr(ibmr);
mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
if (mr->umem)
ib_umem_release(mr->umem);
kfree(mr);
return 0;
}
struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
int max_page_list_len)
{
struct mlx4_ib_dev *dev = to_mdev(pd->device);
struct mlx4_ib_mr *mr;
int err;
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
max_page_list_len, 0, &mr->mmr);
if (err)
goto err_free;
err = mlx4_mr_enable(dev->dev, &mr->mmr);
if (err)
goto err_mr;
mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
mr->umem = NULL;
return &mr->ibmr;
err_mr:
mlx4_mr_free(dev->dev, &mr->mmr);
err_free:
kfree(mr);
return ERR_PTR(err);
}
struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
int page_list_len)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct mlx4_ib_fast_reg_page_list *mfrpl;
int size = page_list_len * sizeof (u64);
if (page_list_len > MAX_FAST_REG_PAGES)
return ERR_PTR(-EINVAL);
mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
if (!mfrpl)
return ERR_PTR(-ENOMEM);
mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL);
if (!mfrpl->ibfrpl.page_list)
goto err_free;
mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
size, &mfrpl->map,
GFP_KERNEL);
if (!mfrpl->mapped_page_list)
goto err_free;
WARN_ON(mfrpl->map & 0x3f);
return &mfrpl->ibfrpl;
err_free:
kfree(mfrpl->ibfrpl.page_list);
kfree(mfrpl);
return ERR_PTR(-ENOMEM);
}
void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
{
struct mlx4_ib_dev *dev = to_mdev(page_list->device);
struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
int size = page_list->max_page_list_len * sizeof (u64);
dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list,
mfrpl->map);
kfree(mfrpl->ibfrpl.page_list);
kfree(mfrpl);
}
struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
struct ib_fmr_attr *fmr_attr)
{
struct mlx4_ib_dev *dev = to_mdev(pd->device);
struct mlx4_ib_fmr *fmr;
int err = -ENOMEM;
fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
if (!fmr)
return ERR_PTR(-ENOMEM);
err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
fmr_attr->max_pages, fmr_attr->max_maps,
fmr_attr->page_shift, &fmr->mfmr);
if (err)
goto err_free;
err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
if (err)
goto err_mr;
fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
return &fmr->ibfmr;
err_mr:
mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
err_free:
kfree(fmr);
return ERR_PTR(err);
}
int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
int npages, u64 iova)
{
struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
&ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
}
int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
{
struct ib_fmr *ibfmr;
int err;
struct mlx4_dev *mdev = NULL;
list_for_each_entry(ibfmr, fmr_list, list) {
if (mdev && to_mdev(ibfmr->device)->dev != mdev)
return -EINVAL;
mdev = to_mdev(ibfmr->device)->dev;
}
if (!mdev)
return 0;
list_for_each_entry(ibfmr, fmr_list, list) {
struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
}
/*
* Make sure all MPT status updates are visible before issuing
* SYNC_TPT firmware command.
*/
wmb();
err = mlx4_SYNC_TPT(mdev);
if (err)
printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
"unmapping FMRs\n", err);
return 0;
}
int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
{
struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
int err;
err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
if (!err)
kfree(ifmr);
return err;
}