2016-03-01 23:20:54 +00:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2016 Oracle. 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 "ib_mr.h"
|
|
|
|
|
2019-07-16 22:29:17 +00:00
|
|
|
static inline void
|
|
|
|
rds_transition_frwr_state(struct rds_ib_mr *ibmr,
|
|
|
|
enum rds_ib_fr_state old_state,
|
|
|
|
enum rds_ib_fr_state new_state)
|
|
|
|
{
|
|
|
|
if (cmpxchg(&ibmr->u.frmr.fr_state,
|
|
|
|
old_state, new_state) == old_state &&
|
|
|
|
old_state == FRMR_IS_INUSE) {
|
|
|
|
/* enforce order of ibmr->u.frmr.fr_state update
|
|
|
|
* before decrementing i_fastreg_inuse_count
|
|
|
|
*/
|
|
|
|
smp_mb__before_atomic();
|
|
|
|
atomic_dec(&ibmr->ic->i_fastreg_inuse_count);
|
|
|
|
if (waitqueue_active(&rds_ib_ring_empty_wait))
|
|
|
|
wake_up(&rds_ib_ring_empty_wait);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-03-01 23:20:54 +00:00
|
|
|
static struct rds_ib_mr *rds_ib_alloc_frmr(struct rds_ib_device *rds_ibdev,
|
|
|
|
int npages)
|
|
|
|
{
|
|
|
|
struct rds_ib_mr_pool *pool;
|
|
|
|
struct rds_ib_mr *ibmr = NULL;
|
|
|
|
struct rds_ib_frmr *frmr;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (npages <= RDS_MR_8K_MSG_SIZE)
|
|
|
|
pool = rds_ibdev->mr_8k_pool;
|
|
|
|
else
|
|
|
|
pool = rds_ibdev->mr_1m_pool;
|
|
|
|
|
|
|
|
ibmr = rds_ib_try_reuse_ibmr(pool);
|
|
|
|
if (ibmr)
|
|
|
|
return ibmr;
|
|
|
|
|
|
|
|
ibmr = kzalloc_node(sizeof(*ibmr), GFP_KERNEL,
|
|
|
|
rdsibdev_to_node(rds_ibdev));
|
|
|
|
if (!ibmr) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto out_no_cigar;
|
|
|
|
}
|
|
|
|
|
|
|
|
frmr = &ibmr->u.frmr;
|
|
|
|
frmr->mr = ib_alloc_mr(rds_ibdev->pd, IB_MR_TYPE_MEM_REG,
|
|
|
|
pool->fmr_attr.max_pages);
|
|
|
|
if (IS_ERR(frmr->mr)) {
|
|
|
|
pr_warn("RDS/IB: %s failed to allocate MR", __func__);
|
2018-08-07 11:34:16 +00:00
|
|
|
err = PTR_ERR(frmr->mr);
|
2016-03-01 23:20:54 +00:00
|
|
|
goto out_no_cigar;
|
|
|
|
}
|
|
|
|
|
|
|
|
ibmr->pool = pool;
|
|
|
|
if (pool->pool_type == RDS_IB_MR_8K_POOL)
|
|
|
|
rds_ib_stats_inc(s_ib_rdma_mr_8k_alloc);
|
|
|
|
else
|
|
|
|
rds_ib_stats_inc(s_ib_rdma_mr_1m_alloc);
|
|
|
|
|
|
|
|
if (atomic_read(&pool->item_count) > pool->max_items_soft)
|
|
|
|
pool->max_items_soft = pool->max_items;
|
|
|
|
|
|
|
|
frmr->fr_state = FRMR_IS_FREE;
|
2019-07-16 22:28:51 +00:00
|
|
|
init_waitqueue_head(&frmr->fr_inv_done);
|
2019-07-16 22:29:02 +00:00
|
|
|
init_waitqueue_head(&frmr->fr_reg_done);
|
2016-03-01 23:20:54 +00:00
|
|
|
return ibmr;
|
|
|
|
|
|
|
|
out_no_cigar:
|
|
|
|
kfree(ibmr);
|
|
|
|
atomic_dec(&pool->item_count);
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void rds_ib_free_frmr(struct rds_ib_mr *ibmr, bool drop)
|
|
|
|
{
|
|
|
|
struct rds_ib_mr_pool *pool = ibmr->pool;
|
|
|
|
|
|
|
|
if (drop)
|
|
|
|
llist_add(&ibmr->llnode, &pool->drop_list);
|
|
|
|
else
|
|
|
|
llist_add(&ibmr->llnode, &pool->free_list);
|
|
|
|
atomic_add(ibmr->sg_len, &pool->free_pinned);
|
|
|
|
atomic_inc(&pool->dirty_count);
|
|
|
|
|
|
|
|
/* If we've pinned too many pages, request a flush */
|
|
|
|
if (atomic_read(&pool->free_pinned) >= pool->max_free_pinned ||
|
|
|
|
atomic_read(&pool->dirty_count) >= pool->max_items / 5)
|
|
|
|
queue_delayed_work(rds_ib_mr_wq, &pool->flush_worker, 10);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rds_ib_post_reg_frmr(struct rds_ib_mr *ibmr)
|
|
|
|
{
|
|
|
|
struct rds_ib_frmr *frmr = &ibmr->u.frmr;
|
|
|
|
struct ib_reg_wr reg_wr;
|
2016-12-05 00:25:43 +00:00
|
|
|
int ret, off = 0;
|
2016-03-01 23:20:54 +00:00
|
|
|
|
|
|
|
while (atomic_dec_return(&ibmr->ic->i_fastreg_wrs) <= 0) {
|
|
|
|
atomic_inc(&ibmr->ic->i_fastreg_wrs);
|
|
|
|
cpu_relax();
|
|
|
|
}
|
|
|
|
|
2016-12-05 00:25:43 +00:00
|
|
|
ret = ib_map_mr_sg_zbva(frmr->mr, ibmr->sg, ibmr->sg_len,
|
|
|
|
&off, PAGE_SIZE);
|
2016-03-01 23:20:54 +00:00
|
|
|
if (unlikely(ret != ibmr->sg_len))
|
|
|
|
return ret < 0 ? ret : -EINVAL;
|
|
|
|
|
2019-07-16 22:29:17 +00:00
|
|
|
if (cmpxchg(&frmr->fr_state,
|
|
|
|
FRMR_IS_FREE, FRMR_IS_INUSE) != FRMR_IS_FREE)
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
atomic_inc(&ibmr->ic->i_fastreg_inuse_count);
|
|
|
|
|
2016-03-01 23:20:54 +00:00
|
|
|
/* Perform a WR for the fast_reg_mr. Each individual page
|
|
|
|
* in the sg list is added to the fast reg page list and placed
|
|
|
|
* inside the fast_reg_mr WR. The key used is a rolling 8bit
|
|
|
|
* counter, which should guarantee uniqueness.
|
|
|
|
*/
|
|
|
|
ib_update_fast_reg_key(frmr->mr, ibmr->remap_count++);
|
2019-07-16 22:29:02 +00:00
|
|
|
frmr->fr_reg = true;
|
2016-03-01 23:20:54 +00:00
|
|
|
|
|
|
|
memset(®_wr, 0, sizeof(reg_wr));
|
|
|
|
reg_wr.wr.wr_id = (unsigned long)(void *)ibmr;
|
|
|
|
reg_wr.wr.opcode = IB_WR_REG_MR;
|
|
|
|
reg_wr.wr.num_sge = 0;
|
|
|
|
reg_wr.mr = frmr->mr;
|
|
|
|
reg_wr.key = frmr->mr->rkey;
|
|
|
|
reg_wr.access = IB_ACCESS_LOCAL_WRITE |
|
|
|
|
IB_ACCESS_REMOTE_READ |
|
|
|
|
IB_ACCESS_REMOTE_WRITE;
|
|
|
|
reg_wr.wr.send_flags = IB_SEND_SIGNALED;
|
|
|
|
|
2018-07-18 16:25:28 +00:00
|
|
|
ret = ib_post_send(ibmr->ic->i_cm_id->qp, ®_wr.wr, NULL);
|
2016-03-01 23:20:54 +00:00
|
|
|
if (unlikely(ret)) {
|
|
|
|
/* Failure here can be because of -ENOMEM as well */
|
2019-07-16 22:29:17 +00:00
|
|
|
rds_transition_frwr_state(ibmr, FRMR_IS_INUSE, FRMR_IS_STALE);
|
|
|
|
|
2016-03-01 23:20:54 +00:00
|
|
|
atomic_inc(&ibmr->ic->i_fastreg_wrs);
|
|
|
|
if (printk_ratelimit())
|
|
|
|
pr_warn("RDS/IB: %s returned error(%d)\n",
|
|
|
|
__func__, ret);
|
2019-07-16 22:29:02 +00:00
|
|
|
goto out;
|
2016-03-01 23:20:54 +00:00
|
|
|
}
|
2019-07-16 22:29:02 +00:00
|
|
|
|
|
|
|
/* Wait for the registration to complete in order to prevent an invalid
|
|
|
|
* access error resulting from a race between the memory region already
|
|
|
|
* being accessed while registration is still pending.
|
|
|
|
*/
|
|
|
|
wait_event(frmr->fr_reg_done, !frmr->fr_reg);
|
|
|
|
|
|
|
|
out:
|
|
|
|
|
2016-03-01 23:20:54 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rds_ib_map_frmr(struct rds_ib_device *rds_ibdev,
|
|
|
|
struct rds_ib_mr_pool *pool,
|
|
|
|
struct rds_ib_mr *ibmr,
|
|
|
|
struct scatterlist *sg, unsigned int sg_len)
|
|
|
|
{
|
|
|
|
struct ib_device *dev = rds_ibdev->dev;
|
|
|
|
struct rds_ib_frmr *frmr = &ibmr->u.frmr;
|
|
|
|
int i;
|
|
|
|
u32 len;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
/* We want to teardown old ibmr values here and fill it up with
|
|
|
|
* new sg values
|
|
|
|
*/
|
|
|
|
rds_ib_teardown_mr(ibmr);
|
|
|
|
|
|
|
|
ibmr->sg = sg;
|
|
|
|
ibmr->sg_len = sg_len;
|
|
|
|
ibmr->sg_dma_len = 0;
|
|
|
|
frmr->sg_byte_len = 0;
|
|
|
|
WARN_ON(ibmr->sg_dma_len);
|
|
|
|
ibmr->sg_dma_len = ib_dma_map_sg(dev, ibmr->sg, ibmr->sg_len,
|
|
|
|
DMA_BIDIRECTIONAL);
|
|
|
|
if (unlikely(!ibmr->sg_dma_len)) {
|
|
|
|
pr_warn("RDS/IB: %s failed!\n", __func__);
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
frmr->sg_byte_len = 0;
|
|
|
|
frmr->dma_npages = 0;
|
|
|
|
len = 0;
|
|
|
|
|
|
|
|
ret = -EINVAL;
|
|
|
|
for (i = 0; i < ibmr->sg_dma_len; ++i) {
|
2019-01-31 16:30:34 +00:00
|
|
|
unsigned int dma_len = sg_dma_len(&ibmr->sg[i]);
|
|
|
|
u64 dma_addr = sg_dma_address(&ibmr->sg[i]);
|
2016-03-01 23:20:54 +00:00
|
|
|
|
|
|
|
frmr->sg_byte_len += dma_len;
|
|
|
|
if (dma_addr & ~PAGE_MASK) {
|
|
|
|
if (i > 0)
|
|
|
|
goto out_unmap;
|
|
|
|
else
|
|
|
|
++frmr->dma_npages;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((dma_addr + dma_len) & ~PAGE_MASK) {
|
|
|
|
if (i < ibmr->sg_dma_len - 1)
|
|
|
|
goto out_unmap;
|
|
|
|
else
|
|
|
|
++frmr->dma_npages;
|
|
|
|
}
|
|
|
|
|
|
|
|
len += dma_len;
|
|
|
|
}
|
|
|
|
frmr->dma_npages += len >> PAGE_SHIFT;
|
|
|
|
|
|
|
|
if (frmr->dma_npages > ibmr->pool->fmr_attr.max_pages) {
|
|
|
|
ret = -EMSGSIZE;
|
|
|
|
goto out_unmap;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = rds_ib_post_reg_frmr(ibmr);
|
|
|
|
if (ret)
|
|
|
|
goto out_unmap;
|
|
|
|
|
|
|
|
if (ibmr->pool->pool_type == RDS_IB_MR_8K_POOL)
|
|
|
|
rds_ib_stats_inc(s_ib_rdma_mr_8k_used);
|
|
|
|
else
|
|
|
|
rds_ib_stats_inc(s_ib_rdma_mr_1m_used);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
out_unmap:
|
|
|
|
ib_dma_unmap_sg(rds_ibdev->dev, ibmr->sg, ibmr->sg_len,
|
|
|
|
DMA_BIDIRECTIONAL);
|
|
|
|
ibmr->sg_dma_len = 0;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rds_ib_post_inv(struct rds_ib_mr *ibmr)
|
|
|
|
{
|
2018-07-18 16:25:28 +00:00
|
|
|
struct ib_send_wr *s_wr;
|
2016-03-01 23:20:54 +00:00
|
|
|
struct rds_ib_frmr *frmr = &ibmr->u.frmr;
|
|
|
|
struct rdma_cm_id *i_cm_id = ibmr->ic->i_cm_id;
|
|
|
|
int ret = -EINVAL;
|
|
|
|
|
|
|
|
if (!i_cm_id || !i_cm_id->qp || !frmr->mr)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (frmr->fr_state != FRMR_IS_INUSE)
|
|
|
|
goto out;
|
|
|
|
|
2019-06-29 00:31:19 +00:00
|
|
|
while (atomic_dec_return(&ibmr->ic->i_fastreg_wrs) <= 0) {
|
|
|
|
atomic_inc(&ibmr->ic->i_fastreg_wrs);
|
2016-03-01 23:20:54 +00:00
|
|
|
cpu_relax();
|
|
|
|
}
|
|
|
|
|
|
|
|
frmr->fr_inv = true;
|
|
|
|
s_wr = &frmr->fr_wr;
|
|
|
|
|
|
|
|
memset(s_wr, 0, sizeof(*s_wr));
|
|
|
|
s_wr->wr_id = (unsigned long)(void *)ibmr;
|
|
|
|
s_wr->opcode = IB_WR_LOCAL_INV;
|
|
|
|
s_wr->ex.invalidate_rkey = frmr->mr->rkey;
|
|
|
|
s_wr->send_flags = IB_SEND_SIGNALED;
|
|
|
|
|
2018-07-18 16:25:28 +00:00
|
|
|
ret = ib_post_send(i_cm_id->qp, s_wr, NULL);
|
2016-03-01 23:20:54 +00:00
|
|
|
if (unlikely(ret)) {
|
2019-07-16 22:29:17 +00:00
|
|
|
rds_transition_frwr_state(ibmr, FRMR_IS_INUSE, FRMR_IS_STALE);
|
2016-03-01 23:20:54 +00:00
|
|
|
frmr->fr_inv = false;
|
2019-07-16 22:29:17 +00:00
|
|
|
/* enforce order of frmr->fr_inv update
|
|
|
|
* before incrementing i_fastreg_wrs
|
|
|
|
*/
|
|
|
|
smp_mb__before_atomic();
|
2019-06-29 00:31:19 +00:00
|
|
|
atomic_inc(&ibmr->ic->i_fastreg_wrs);
|
2016-03-01 23:20:54 +00:00
|
|
|
pr_err("RDS/IB: %s returned error(%d)\n", __func__, ret);
|
|
|
|
goto out;
|
|
|
|
}
|
2019-07-16 22:29:02 +00:00
|
|
|
|
|
|
|
/* Wait for the FRMR_IS_FREE (or FRMR_IS_STALE) transition in order to
|
|
|
|
* 1) avoid a silly bouncing between "clean_list" and "drop_list"
|
|
|
|
* triggered by function "rds_ib_reg_frmr" as it is releases frmr
|
|
|
|
* regions whose state is not "FRMR_IS_FREE" right away.
|
|
|
|
* 2) prevents an invalid access error in a race
|
|
|
|
* from a pending "IB_WR_LOCAL_INV" operation
|
|
|
|
* with a teardown ("dma_unmap_sg", "put_page")
|
|
|
|
* and de-registration ("ib_dereg_mr") of the corresponding
|
|
|
|
* memory region.
|
|
|
|
*/
|
|
|
|
wait_event(frmr->fr_inv_done, frmr->fr_state != FRMR_IS_INUSE);
|
|
|
|
|
2016-03-01 23:20:54 +00:00
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc)
|
|
|
|
{
|
|
|
|
struct rds_ib_mr *ibmr = (void *)(unsigned long)wc->wr_id;
|
|
|
|
struct rds_ib_frmr *frmr = &ibmr->u.frmr;
|
|
|
|
|
|
|
|
if (wc->status != IB_WC_SUCCESS) {
|
2019-07-16 22:29:17 +00:00
|
|
|
rds_transition_frwr_state(ibmr, FRMR_IS_INUSE, FRMR_IS_STALE);
|
2016-03-01 23:20:54 +00:00
|
|
|
if (rds_conn_up(ic->conn))
|
|
|
|
rds_ib_conn_error(ic->conn,
|
|
|
|
"frmr completion <%pI4,%pI4> status %u(%s), vendor_err 0x%x, disconnecting and reconnecting\n",
|
|
|
|
&ic->conn->c_laddr,
|
|
|
|
&ic->conn->c_faddr,
|
|
|
|
wc->status,
|
|
|
|
ib_wc_status_msg(wc->status),
|
|
|
|
wc->vendor_err);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (frmr->fr_inv) {
|
2019-07-16 22:29:17 +00:00
|
|
|
rds_transition_frwr_state(ibmr, FRMR_IS_INUSE, FRMR_IS_FREE);
|
2016-03-01 23:20:54 +00:00
|
|
|
frmr->fr_inv = false;
|
2019-07-16 22:28:51 +00:00
|
|
|
wake_up(&frmr->fr_inv_done);
|
2016-03-01 23:20:54 +00:00
|
|
|
}
|
2019-06-29 00:31:19 +00:00
|
|
|
|
2019-07-16 22:29:02 +00:00
|
|
|
if (frmr->fr_reg) {
|
|
|
|
frmr->fr_reg = false;
|
|
|
|
wake_up(&frmr->fr_reg_done);
|
|
|
|
}
|
|
|
|
|
2019-07-16 22:29:17 +00:00
|
|
|
/* enforce order of frmr->{fr_reg,fr_inv} update
|
|
|
|
* before incrementing i_fastreg_wrs
|
|
|
|
*/
|
|
|
|
smp_mb__before_atomic();
|
2019-06-29 00:31:19 +00:00
|
|
|
atomic_inc(&ic->i_fastreg_wrs);
|
2016-03-01 23:20:54 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void rds_ib_unreg_frmr(struct list_head *list, unsigned int *nfreed,
|
|
|
|
unsigned long *unpinned, unsigned int goal)
|
|
|
|
{
|
|
|
|
struct rds_ib_mr *ibmr, *next;
|
|
|
|
struct rds_ib_frmr *frmr;
|
2019-07-16 22:29:02 +00:00
|
|
|
int ret = 0, ret2;
|
2016-03-01 23:20:54 +00:00
|
|
|
unsigned int freed = *nfreed;
|
|
|
|
|
|
|
|
/* String all ib_mr's onto one list and hand them to ib_unmap_fmr */
|
|
|
|
list_for_each_entry(ibmr, list, unmap_list) {
|
2019-07-16 22:29:02 +00:00
|
|
|
if (ibmr->sg_dma_len) {
|
|
|
|
ret2 = rds_ib_post_inv(ibmr);
|
|
|
|
if (ret2 && !ret)
|
|
|
|
ret = ret2;
|
|
|
|
}
|
2016-03-01 23:20:54 +00:00
|
|
|
}
|
2019-07-16 22:29:02 +00:00
|
|
|
|
2016-03-01 23:20:54 +00:00
|
|
|
if (ret)
|
|
|
|
pr_warn("RDS/IB: %s failed (err=%d)\n", __func__, ret);
|
|
|
|
|
|
|
|
/* Now we can destroy the DMA mapping and unpin any pages */
|
|
|
|
list_for_each_entry_safe(ibmr, next, list, unmap_list) {
|
|
|
|
*unpinned += ibmr->sg_len;
|
|
|
|
frmr = &ibmr->u.frmr;
|
|
|
|
__rds_ib_teardown_mr(ibmr);
|
|
|
|
if (freed < goal || frmr->fr_state == FRMR_IS_STALE) {
|
|
|
|
/* Don't de-allocate if the MR is not free yet */
|
|
|
|
if (frmr->fr_state == FRMR_IS_INUSE)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (ibmr->pool->pool_type == RDS_IB_MR_8K_POOL)
|
|
|
|
rds_ib_stats_inc(s_ib_rdma_mr_8k_free);
|
|
|
|
else
|
|
|
|
rds_ib_stats_inc(s_ib_rdma_mr_1m_free);
|
|
|
|
list_del(&ibmr->unmap_list);
|
|
|
|
if (frmr->mr)
|
|
|
|
ib_dereg_mr(frmr->mr);
|
|
|
|
kfree(ibmr);
|
|
|
|
freed++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
*nfreed = freed;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct rds_ib_mr *rds_ib_reg_frmr(struct rds_ib_device *rds_ibdev,
|
|
|
|
struct rds_ib_connection *ic,
|
|
|
|
struct scatterlist *sg,
|
|
|
|
unsigned long nents, u32 *key)
|
|
|
|
{
|
|
|
|
struct rds_ib_mr *ibmr = NULL;
|
|
|
|
struct rds_ib_frmr *frmr;
|
|
|
|
int ret;
|
|
|
|
|
2018-07-25 03:31:58 +00:00
|
|
|
if (!ic) {
|
|
|
|
/* TODO: Add FRWR support for RDS_GET_MR using proxy qp*/
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
}
|
|
|
|
|
2016-03-01 23:20:54 +00:00
|
|
|
do {
|
2019-07-16 22:29:02 +00:00
|
|
|
if (ibmr)
|
2016-03-01 23:20:54 +00:00
|
|
|
rds_ib_free_frmr(ibmr, true);
|
|
|
|
ibmr = rds_ib_alloc_frmr(rds_ibdev, nents);
|
|
|
|
if (IS_ERR(ibmr))
|
|
|
|
return ibmr;
|
|
|
|
frmr = &ibmr->u.frmr;
|
|
|
|
} while (frmr->fr_state != FRMR_IS_FREE);
|
|
|
|
|
|
|
|
ibmr->ic = ic;
|
|
|
|
ibmr->device = rds_ibdev;
|
|
|
|
ret = rds_ib_map_frmr(rds_ibdev, ibmr->pool, ibmr, sg, nents);
|
|
|
|
if (ret == 0) {
|
|
|
|
*key = frmr->mr->rkey;
|
|
|
|
} else {
|
|
|
|
rds_ib_free_frmr(ibmr, false);
|
|
|
|
ibmr = ERR_PTR(ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ibmr;
|
|
|
|
}
|
|
|
|
|
|
|
|
void rds_ib_free_frmr_list(struct rds_ib_mr *ibmr)
|
|
|
|
{
|
|
|
|
struct rds_ib_mr_pool *pool = ibmr->pool;
|
|
|
|
struct rds_ib_frmr *frmr = &ibmr->u.frmr;
|
|
|
|
|
|
|
|
if (frmr->fr_state == FRMR_IS_STALE)
|
|
|
|
llist_add(&ibmr->llnode, &pool->drop_list);
|
|
|
|
else
|
|
|
|
llist_add(&ibmr->llnode, &pool->free_list);
|
|
|
|
}
|