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xprtrdma: Remove usage of "mw" 

Clean up: struct rpcrdma_mw was named after Memory Windows, but
xprtrdma no longer supports a Memory Window registration mode.
Rename rpcrdma_mw and its fields to reduce confusion and make
the code more sensible to read.

Renaming "mw" was suggested by Tom Talpey, the author of the
original xprtrdma implementation. It's a good idea, but I haven't
done this until now because it's a huge diffstat for no benefit
other than code readability.

However, I'm about to introduce static trace points that expose
a few of xprtrdma's internal data structures. They should make sense
in the trace report, and it's reasonable to treat trace points as a
kernel API contract which might be difficult to change later.

While I'm churning things up, two additional changes:
- rename variables unhelpfully called "r" to "mr", to improve code
  clarity, and
- rename the MR-related helper functions using the form
  "rpcrdma_mr_<verb>", to be consistent with other areas of the
  code.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2017-12-14 20:57:55 -05:00 committed by Anna Schumaker
parent ce5b371782
commit 96ceddea37
5 changed files with 292 additions and 278 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

148
net/sunrpc/xprtrdma/fmr_ops.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015 Oracle. All rights reserved.
* Copyright (c) 2015, 2017 Oracle. All rights reserved.
* Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
*/
@ -47,7 +47,7 @@ fmr_is_supported(struct rpcrdma_ia *ia)
}
static int
fmr_op_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mw *mw)
fmr_op_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr)
{
static struct ib_fmr_attr fmr_attr = {
.max_pages = RPCRDMA_MAX_FMR_SGES,
@ -55,106 +55,106 @@ fmr_op_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mw *mw)
.page_shift = PAGE_SHIFT
};
mw->fmr.fm_physaddrs = kcalloc(RPCRDMA_MAX_FMR_SGES,
mr->fmr.fm_physaddrs = kcalloc(RPCRDMA_MAX_FMR_SGES,
sizeof(u64), GFP_KERNEL);
if (!mw->fmr.fm_physaddrs)
if (!mr->fmr.fm_physaddrs)
goto out_free;
mw->mw_sg = kcalloc(RPCRDMA_MAX_FMR_SGES,
sizeof(*mw->mw_sg), GFP_KERNEL);
if (!mw->mw_sg)
mr->mr_sg = kcalloc(RPCRDMA_MAX_FMR_SGES,
sizeof(*mr->mr_sg), GFP_KERNEL);
if (!mr->mr_sg)
goto out_free;
sg_init_table(mw->mw_sg, RPCRDMA_MAX_FMR_SGES);
sg_init_table(mr->mr_sg, RPCRDMA_MAX_FMR_SGES);
mw->fmr.fm_mr = ib_alloc_fmr(ia->ri_pd, RPCRDMA_FMR_ACCESS_FLAGS,
mr->fmr.fm_mr = ib_alloc_fmr(ia->ri_pd, RPCRDMA_FMR_ACCESS_FLAGS,
&fmr_attr);
if (IS_ERR(mw->fmr.fm_mr))
if (IS_ERR(mr->fmr.fm_mr))
goto out_fmr_err;
return 0;
out_fmr_err:
dprintk("RPC: %s: ib_alloc_fmr returned %ld\n", __func__,
PTR_ERR(mw->fmr.fm_mr));
PTR_ERR(mr->fmr.fm_mr));
out_free:
kfree(mw->mw_sg);
kfree(mw->fmr.fm_physaddrs);
kfree(mr->mr_sg);
kfree(mr->fmr.fm_physaddrs);
return -ENOMEM;
}
static int
__fmr_unmap(struct rpcrdma_mw *mw)
__fmr_unmap(struct rpcrdma_mr *mr)
{
LIST_HEAD(l);
int rc;
list_add(&mw->fmr.fm_mr->list, &l);
list_add(&mr->fmr.fm_mr->list, &l);
rc = ib_unmap_fmr(&l);
list_del(&mw->fmr.fm_mr->list);
list_del(&mr->fmr.fm_mr->list);
return rc;
}
static void
fmr_op_release_mr(struct rpcrdma_mw *r)
fmr_op_release_mr(struct rpcrdma_mr *mr)
{
LIST_HEAD(unmap_list);
int rc;
/* Ensure MW is not on any rl_registered list */
if (!list_empty(&r->mw_list))
list_del(&r->mw_list);
if (!list_empty(&mr->mr_list))
list_del(&mr->mr_list);
kfree(r->fmr.fm_physaddrs);
kfree(r->mw_sg);
kfree(mr->fmr.fm_physaddrs);
kfree(mr->mr_sg);
/* In case this one was left mapped, try to unmap it
* to prevent dealloc_fmr from failing with EBUSY
*/
rc = __fmr_unmap(r);
rc = __fmr_unmap(mr);
if (rc)
pr_err("rpcrdma: final ib_unmap_fmr for %p failed %i\n",
r, rc);
mr, rc);
rc = ib_dealloc_fmr(r->fmr.fm_mr);
rc = ib_dealloc_fmr(mr->fmr.fm_mr);
if (rc)
pr_err("rpcrdma: final ib_dealloc_fmr for %p returned %i\n",
r, rc);
mr, rc);
kfree(r);
kfree(mr);
}
/* Reset of a single FMR.
*/
static void
fmr_op_recover_mr(struct rpcrdma_mw *mw)
fmr_op_recover_mr(struct rpcrdma_mr *mr)
{
struct rpcrdma_xprt *r_xprt = mw->mw_xprt;
struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
int rc;
/* ORDER: invalidate first */
rc = __fmr_unmap(mw);
rc = __fmr_unmap(mr);
/* ORDER: then DMA unmap */
ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
mw->mw_sg, mw->mw_nents, mw->mw_dir);
mr->mr_sg, mr->mr_nents, mr->mr_dir);
if (rc)
goto out_release;
rpcrdma_put_mw(r_xprt, mw);
rpcrdma_mr_put(mr);
r_xprt->rx_stats.mrs_recovered++;
return;
out_release:
pr_err("rpcrdma: FMR reset failed (%d), %p released\n", rc, mw);
pr_err("rpcrdma: FMR reset failed (%d), %p released\n", rc, mr);
r_xprt->rx_stats.mrs_orphaned++;
spin_lock(&r_xprt->rx_buf.rb_mwlock);
list_del(&mw->mw_all);
spin_unlock(&r_xprt->rx_buf.rb_mwlock);
spin_lock(&r_xprt->rx_buf.rb_mrlock);
list_del(&mr->mr_all);
spin_unlock(&r_xprt->rx_buf.rb_mrlock);
fmr_op_release_mr(mw);
fmr_op_release_mr(mr);
}
static int
@ -180,15 +180,15 @@ fmr_op_maxpages(struct rpcrdma_xprt *r_xprt)
*/
static struct rpcrdma_mr_seg *
fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
int nsegs, bool writing, struct rpcrdma_mw **out)
int nsegs, bool writing, struct rpcrdma_mr **out)
{
struct rpcrdma_mr_seg *seg1 = seg;
int len, pageoff, i, rc;
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
u64 *dma_pages;
mw = rpcrdma_get_mw(r_xprt);
if (!mw)
mr = rpcrdma_mr_get(r_xprt);
if (!mr)
return ERR_PTR(-ENOBUFS);
pageoff = offset_in_page(seg1->mr_offset);
@ -199,12 +199,12 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
nsegs = RPCRDMA_MAX_FMR_SGES;
for (i = 0; i < nsegs;) {
if (seg->mr_page)
sg_set_page(&mw->mw_sg[i],
sg_set_page(&mr->mr_sg[i],
seg->mr_page,
seg->mr_len,
offset_in_page(seg->mr_offset));
else
sg_set_buf(&mw->mw_sg[i], seg->mr_offset,
sg_set_buf(&mr->mr_sg[i], seg->mr_offset,
seg->mr_len);
len += seg->mr_len;
++seg;
@ -214,40 +214,40 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len))
break;
}
mw->mw_dir = rpcrdma_data_dir(writing);
mr->mr_dir = rpcrdma_data_dir(writing);
mw->mw_nents = ib_dma_map_sg(r_xprt->rx_ia.ri_device,
mw->mw_sg, i, mw->mw_dir);
if (!mw->mw_nents)
mr->mr_nents = ib_dma_map_sg(r_xprt->rx_ia.ri_device,
mr->mr_sg, i, mr->mr_dir);
if (!mr->mr_nents)
goto out_dmamap_err;
for (i = 0, dma_pages = mw->fmr.fm_physaddrs; i < mw->mw_nents; i++)
dma_pages[i] = sg_dma_address(&mw->mw_sg[i]);
rc = ib_map_phys_fmr(mw->fmr.fm_mr, dma_pages, mw->mw_nents,
for (i = 0, dma_pages = mr->fmr.fm_physaddrs; i < mr->mr_nents; i++)
dma_pages[i] = sg_dma_address(&mr->mr_sg[i]);
rc = ib_map_phys_fmr(mr->fmr.fm_mr, dma_pages, mr->mr_nents,
dma_pages[0]);
if (rc)
goto out_maperr;
mw->mw_handle = mw->fmr.fm_mr->rkey;
mw->mw_length = len;
mw->mw_offset = dma_pages[0] + pageoff;
mr->mr_handle = mr->fmr.fm_mr->rkey;
mr->mr_length = len;
mr->mr_offset = dma_pages[0] + pageoff;
*out = mw;
*out = mr;
return seg;
out_dmamap_err:
pr_err("rpcrdma: failed to DMA map sg %p sg_nents %d\n",
mw->mw_sg, i);
rpcrdma_put_mw(r_xprt, mw);
mr->mr_sg, i);
rpcrdma_mr_put(mr);
return ERR_PTR(-EIO);
out_maperr:
pr_err("rpcrdma: ib_map_phys_fmr %u@0x%llx+%i (%d) status %i\n",
len, (unsigned long long)dma_pages[0],
pageoff, mw->mw_nents, rc);
pageoff, mr->mr_nents, rc);
ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
mw->mw_sg, mw->mw_nents, mw->mw_dir);
rpcrdma_put_mw(r_xprt, mw);
mr->mr_sg, mr->mr_nents, mr->mr_dir);
rpcrdma_mr_put(mr);
return ERR_PTR(-EIO);
}
@ -256,13 +256,13 @@ out_maperr:
* Sleeps until it is safe for the host CPU to access the
* previously mapped memory regions.
*
* Caller ensures that @mws is not empty before the call. This
* Caller ensures that @mrs is not empty before the call. This
* function empties the list.
*/
static void
fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mrs)
{
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
LIST_HEAD(unmap_list);
int rc;
@ -271,10 +271,10 @@ fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
* ib_unmap_fmr() is slow, so use a single call instead
* of one call per mapped FMR.
*/
list_for_each_entry(mw, mws, mw_list) {
list_for_each_entry(mr, mrs, mr_list) {
dprintk("RPC: %s: unmapping fmr %p\n",
__func__, &mw->fmr);
list_add_tail(&mw->fmr.fm_mr->list, &unmap_list);
__func__, &mr->fmr);
list_add_tail(&mr->fmr.fm_mr->list, &unmap_list);
}
r_xprt->rx_stats.local_inv_needed++;
rc = ib_unmap_fmr(&unmap_list);
@ -284,14 +284,14 @@ fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
/* ORDER: Now DMA unmap all of the req's MRs, and return
* them to the free MW list.
*/
while (!list_empty(mws)) {
mw = rpcrdma_pop_mw(mws);
while (!list_empty(mrs)) {
mr = rpcrdma_mr_pop(mrs);
dprintk("RPC: %s: DMA unmapping fmr %p\n",
__func__, &mw->fmr);
list_del(&mw->fmr.fm_mr->list);
__func__, &mr->fmr);
list_del(&mr->fmr.fm_mr->list);
ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
mw->mw_sg, mw->mw_nents, mw->mw_dir);
rpcrdma_put_mw(r_xprt, mw);
mr->mr_sg, mr->mr_nents, mr->mr_dir);
rpcrdma_mr_put(mr);
}
return;
@ -299,10 +299,10 @@ fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
out_reset:
pr_err("rpcrdma: ib_unmap_fmr failed (%i)\n", rc);
while (!list_empty(mws)) {
mw = rpcrdma_pop_mw(mws);
list_del(&mw->fmr.fm_mr->list);
fmr_op_recover_mr(mw);
while (!list_empty(mrs)) {
mr = rpcrdma_mr_pop(mrs);
list_del(&mr->fmr.fm_mr->list);
fmr_op_recover_mr(mr);
}
}

177
net/sunrpc/xprtrdma/frwr_ops.c
View File

@ -17,7 +17,7 @@
* A Memory Region is prepared for RDMA READ or WRITE using a FAST_REG
* Work Request (frwr_op_map). When the RDMA operation is finished, this
* Memory Region is invalidated using a LOCAL_INV Work Request
* (frwr_op_unmap).
* (frwr_op_unmap_sync).
*
* Typically these Work Requests are not signaled, and neither are RDMA
* SEND Work Requests (with the exception of signaling occasionally to
@ -26,7 +26,7 @@
*
* As an optimization, frwr_op_unmap marks MRs INVALID before the
* LOCAL_INV WR is posted. If posting succeeds, the MR is placed on
* rb_mws immediately so that no work (like managing a linked list
* rb_mrs immediately so that no work (like managing a linked list
* under a spinlock) is needed in the completion upcall.
*
* But this means that frwr_op_map() can occasionally encounter an MR
@ -60,7 +60,7 @@
* When frwr_op_map encounters FLUSHED and VALID MRs, they are recovered
* with ib_dereg_mr and then are re-initialized. Because MR recovery
* allocates fresh resources, it is deferred to a workqueue, and the
* recovered MRs are placed back on the rb_mws list when recovery is
* recovered MRs are placed back on the rb_mrs list when recovery is
* complete. frwr_op_map allocates another MR for the current RPC while
* the broken MR is reset.
*
@ -96,21 +96,21 @@ out_not_supported:
}
static int
frwr_op_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mw *r)
frwr_op_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr)
{
unsigned int depth = ia->ri_max_frwr_depth;
struct rpcrdma_frwr *frwr = &r->frwr;
struct rpcrdma_frwr *frwr = &mr->frwr;
int rc;
frwr->fr_mr = ib_alloc_mr(ia->ri_pd, ia->ri_mrtype, depth);
if (IS_ERR(frwr->fr_mr))
goto out_mr_err;
r->mw_sg = kcalloc(depth, sizeof(*r->mw_sg), GFP_KERNEL);
if (!r->mw_sg)
mr->mr_sg = kcalloc(depth, sizeof(*mr->mr_sg), GFP_KERNEL);
if (!mr->mr_sg)
goto out_list_err;
sg_init_table(r->mw_sg, depth);
sg_init_table(mr->mr_sg, depth);
init_completion(&frwr->fr_linv_done);
return 0;
@ -129,32 +129,32 @@ out_list_err:
}
static void
frwr_op_release_mr(struct rpcrdma_mw *r)
frwr_op_release_mr(struct rpcrdma_mr *mr)
{
int rc;
/* Ensure MW is not on any rl_registered list */
if (!list_empty(&r->mw_list))
list_del(&r->mw_list);
/* Ensure MR is not on any rl_registered list */
if (!list_empty(&mr->mr_list))
list_del(&mr->mr_list);
rc = ib_dereg_mr(r->frwr.fr_mr);
rc = ib_dereg_mr(mr->frwr.fr_mr);
if (rc)
pr_err("rpcrdma: final ib_dereg_mr for %p returned %i\n",
r, rc);
kfree(r->mw_sg);
kfree(r);
mr, rc);
kfree(mr->mr_sg);
kfree(mr);
}
static int
__frwr_reset_mr(struct rpcrdma_ia *ia, struct rpcrdma_mw *r)
__frwr_mr_reset(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr)
{
struct rpcrdma_frwr *frwr = &r->frwr;
struct rpcrdma_frwr *frwr = &mr->frwr;
int rc;
rc = ib_dereg_mr(frwr->fr_mr);
if (rc) {
pr_warn("rpcrdma: ib_dereg_mr status %d, frwr %p orphaned\n",
rc, r);
rc, mr);
return rc;
}
@ -162,7 +162,7 @@ __frwr_reset_mr(struct rpcrdma_ia *ia, struct rpcrdma_mw *r)
ia->ri_max_frwr_depth);
if (IS_ERR(frwr->fr_mr)) {
pr_warn("rpcrdma: ib_alloc_mr status %ld, frwr %p orphaned\n",
PTR_ERR(frwr->fr_mr), r);
PTR_ERR(frwr->fr_mr), mr);
return PTR_ERR(frwr->fr_mr);
}
@ -174,33 +174,33 @@ __frwr_reset_mr(struct rpcrdma_ia *ia, struct rpcrdma_mw *r)
/* Reset of a single FRWR. Generate a fresh rkey by replacing the MR.
*/
static void
frwr_op_recover_mr(struct rpcrdma_mw *mw)
frwr_op_recover_mr(struct rpcrdma_mr *mr)
{
enum rpcrdma_frwr_state state = mw->frwr.fr_state;
struct rpcrdma_xprt *r_xprt = mw->mw_xprt;
enum rpcrdma_frwr_state state = mr->frwr.fr_state;
struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
int rc;
rc = __frwr_reset_mr(ia, mw);
rc = __frwr_mr_reset(ia, mr);
if (state != FRWR_FLUSHED_LI)
ib_dma_unmap_sg(ia->ri_device,
mw->mw_sg, mw->mw_nents, mw->mw_dir);
mr->mr_sg, mr->mr_nents, mr->mr_dir);
if (rc)
goto out_release;
rpcrdma_put_mw(r_xprt, mw);
rpcrdma_mr_put(mr);
r_xprt->rx_stats.mrs_recovered++;
return;
out_release:
pr_err("rpcrdma: FRWR reset failed %d, %p release\n", rc, mw);
pr_err("rpcrdma: FRWR reset failed %d, %p release\n", rc, mr);
r_xprt->rx_stats.mrs_orphaned++;
spin_lock(&r_xprt->rx_buf.rb_mwlock);
list_del(&mw->mw_all);
spin_unlock(&r_xprt->rx_buf.rb_mwlock);
spin_lock(&r_xprt->rx_buf.rb_mrlock);
list_del(&mr->mr_all);
spin_unlock(&r_xprt->rx_buf.rb_mrlock);
frwr_op_release_mr(mw);
frwr_op_release_mr(mr);
}
static int
@ -347,40 +347,39 @@ frwr_wc_localinv_wake(struct ib_cq *cq, struct ib_wc *wc)
*/
static struct rpcrdma_mr_seg *
frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
int nsegs, bool writing, struct rpcrdma_mw **out)
int nsegs, bool writing, struct rpcrdma_mr **out)
{
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
bool holes_ok = ia->ri_mrtype == IB_MR_TYPE_SG_GAPS;
struct rpcrdma_frwr *frwr;
struct rpcrdma_mw *mw;
struct ib_mr *mr;
struct rpcrdma_mr *mr;
struct ib_mr *ibmr;
struct ib_reg_wr *reg_wr;
struct ib_send_wr *bad_wr;
int rc, i, n;
u8 key;
mw = NULL;
mr = NULL;
do {
if (mw)
rpcrdma_defer_mr_recovery(mw);
mw = rpcrdma_get_mw(r_xprt);
if (!mw)
if (mr)
rpcrdma_mr_defer_recovery(mr);
mr = rpcrdma_mr_get(r_xprt);
if (!mr)
return ERR_PTR(-ENOBUFS);
} while (mw->frwr.fr_state != FRWR_IS_INVALID);
frwr = &mw->frwr;
} while (mr->frwr.fr_state != FRWR_IS_INVALID);
frwr = &mr->frwr;
frwr->fr_state = FRWR_IS_VALID;
mr = frwr->fr_mr;
if (nsegs > ia->ri_max_frwr_depth)
nsegs = ia->ri_max_frwr_depth;
for (i = 0; i < nsegs;) {
if (seg->mr_page)
sg_set_page(&mw->mw_sg[i],
sg_set_page(&mr->mr_sg[i],
seg->mr_page,
seg->mr_len,
offset_in_page(seg->mr_offset));
else
sg_set_buf(&mw->mw_sg[i], seg->mr_offset,
sg_set_buf(&mr->mr_sg[i], seg->mr_offset,
seg->mr_len);
++seg;
@ -391,21 +390,22 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len))
break;
}
mw->mw_dir = rpcrdma_data_dir(writing);
mr->mr_dir = rpcrdma_data_dir(writing);
mw->mw_nents = ib_dma_map_sg(ia->ri_device, mw->mw_sg, i, mw->mw_dir);
if (!mw->mw_nents)
mr->mr_nents = ib_dma_map_sg(ia->ri_device, mr->mr_sg, i, mr->mr_dir);
if (!mr->mr_nents)
goto out_dmamap_err;
n = ib_map_mr_sg(mr, mw->mw_sg, mw->mw_nents, NULL, PAGE_SIZE);
if (unlikely(n != mw->mw_nents))
ibmr = frwr->fr_mr;
n = ib_map_mr_sg(ibmr, mr->mr_sg, mr->mr_nents, NULL, PAGE_SIZE);
if (unlikely(n != mr->mr_nents))
goto out_mapmr_err;
dprintk("RPC: %s: Using frwr %p to map %u segments (%llu bytes)\n",
__func__, frwr, mw->mw_nents, mr->length);
__func__, frwr, mr->mr_nents, ibmr->length);
key = (u8)(mr->rkey & 0x000000FF);
ib_update_fast_reg_key(mr, ++key);
key = (u8)(ibmr->rkey & 0x000000FF);
ib_update_fast_reg_key(ibmr, ++key);
reg_wr = &frwr->fr_regwr;
reg_wr->wr.next = NULL;
@ -414,8 +414,8 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
reg_wr->wr.wr_cqe = &frwr->fr_cqe;
reg_wr->wr.num_sge = 0;
reg_wr->wr.send_flags = 0;
reg_wr->mr = mr;
reg_wr->key = mr->rkey;
reg_wr->mr = ibmr;
reg_wr->key = ibmr->rkey;
reg_wr->access = writing ?
IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE :
IB_ACCESS_REMOTE_READ;
@ -424,48 +424,48 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
if (rc)
goto out_senderr;
mw->mw_handle = mr->rkey;
mw->mw_length = mr->length;
mw->mw_offset = mr->iova;
mr->mr_handle = ibmr->rkey;
mr->mr_length = ibmr->length;
mr->mr_offset = ibmr->iova;
*out = mw;
*out = mr;
return seg;
out_dmamap_err:
pr_err("rpcrdma: failed to DMA map sg %p sg_nents %d\n",
mw->mw_sg, i);
mr->mr_sg, i);
frwr->fr_state = FRWR_IS_INVALID;
rpcrdma_put_mw(r_xprt, mw);
rpcrdma_mr_put(mr);
return ERR_PTR(-EIO);
out_mapmr_err:
pr_err("rpcrdma: failed to map mr %p (%d/%d)\n",
frwr->fr_mr, n, mw->mw_nents);
rpcrdma_defer_mr_recovery(mw);
frwr->fr_mr, n, mr->mr_nents);
rpcrdma_mr_defer_recovery(mr);
return ERR_PTR(-EIO);
out_senderr:
pr_err("rpcrdma: FRWR registration ib_post_send returned %i\n", rc);
rpcrdma_defer_mr_recovery(mw);
rpcrdma_mr_defer_recovery(mr);
return ERR_PTR(-ENOTCONN);
}
/* Handle a remotely invalidated mw on the @mws list
/* Handle a remotely invalidated mr on the @mrs list
*/
static void
frwr_op_reminv(struct rpcrdma_rep *rep, struct list_head *mws)
frwr_op_reminv(struct rpcrdma_rep *rep, struct list_head *mrs)
{
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
list_for_each_entry(mw, mws, mw_list)
if (mw->mw_handle == rep->rr_inv_rkey) {
struct rpcrdma_xprt *r_xprt = mw->mw_xprt;
list_for_each_entry(mr, mrs, mr_list)
if (mr->mr_handle == rep->rr_inv_rkey) {
struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
list_del(&mw->mw_list);
mw->frwr.fr_state = FRWR_IS_INVALID;
list_del(&mr->mr_list);
mr->frwr.fr_state = FRWR_IS_INVALID;
ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
mw->mw_sg, mw->mw_nents, mw->mw_dir);
rpcrdma_put_mw(r_xprt, mw);
mr->mr_sg, mr->mr_nents, mr->mr_dir);
rpcrdma_mr_put(mr);
break; /* only one invalidated MR per RPC */
}
}
@ -475,16 +475,16 @@ frwr_op_reminv(struct rpcrdma_rep *rep, struct list_head *mws)
* Sleeps until it is safe for the host CPU to access the
* previously mapped memory regions.
*
* Caller ensures that @mws is not empty before the call. This
* Caller ensures that @mrs is not empty before the call. This
* function empties the list.
*/
static void
frwr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
frwr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mrs)
{
struct ib_send_wr *first, **prev, *last, *bad_wr;
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
struct rpcrdma_frwr *frwr;
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
int count, rc;
/* ORDER: Invalidate all of the MRs first
@ -495,10 +495,11 @@ frwr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
frwr = NULL;
count = 0;
prev = &first;
list_for_each_entry(mw, mws, mw_list) {
mw->frwr.fr_state = FRWR_IS_INVALID;
list_for_each_entry(mr, mrs, mr_list) {
mr->frwr.fr_state = FRWR_IS_INVALID;
frwr = &mr->frwr;
frwr = &mw->frwr;
dprintk("RPC: %s: invalidating frwr %p\n",
__func__, frwr);
@ -507,7 +508,7 @@ frwr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
memset(last, 0, sizeof(*last));
last->wr_cqe = &frwr->fr_cqe;
last->opcode = IB_WR_LOCAL_INV;
last->ex.invalidate_rkey = mw->mw_handle;
last->ex.invalidate_rkey = mr->mr_handle;
count++;
*prev = last;
@ -537,16 +538,16 @@ frwr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
goto reset_mrs;
/* ORDER: Now DMA unmap all of the MRs, and return
* them to the free MW list.
* them to the free MR list.
*/
unmap:
while (!list_empty(mws)) {
mw = rpcrdma_pop_mw(mws);
while (!list_empty(mrs)) {
mr = rpcrdma_mr_pop(mrs);
dprintk("RPC: %s: DMA unmapping frwr %p\n",
__func__, &mw->frwr);
__func__, &mr->frwr);
ib_dma_unmap_sg(ia->ri_device,
mw->mw_sg, mw->mw_nents, mw->mw_dir);
rpcrdma_put_mw(r_xprt, mw);
mr->mr_sg, mr->mr_nents, mr->mr_dir);
rpcrdma_mr_put(mr);
}
return;
@ -559,9 +560,9 @@ reset_mrs:
while (bad_wr) {
frwr = container_of(bad_wr, struct rpcrdma_frwr,
fr_invwr);
mw = container_of(frwr, struct rpcrdma_mw, frwr);
mr = container_of(frwr, struct rpcrdma_mr, frwr);
__frwr_reset_mr(ia, mw);
__frwr_mr_reset(ia, mr);
bad_wr = bad_wr->next;
}

64
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -292,15 +292,15 @@ encode_item_not_present(struct xdr_stream *xdr)
}
static void
xdr_encode_rdma_segment(__be32 *iptr, struct rpcrdma_mw *mw)
xdr_encode_rdma_segment(__be32 *iptr, struct rpcrdma_mr *mr)
{
*iptr++ = cpu_to_be32(mw->mw_handle);
*iptr++ = cpu_to_be32(mw->mw_length);
xdr_encode_hyper(iptr, mw->mw_offset);
*iptr++ = cpu_to_be32(mr->mr_handle);
*iptr++ = cpu_to_be32(mr->mr_length);
xdr_encode_hyper(iptr, mr->mr_offset);
}
static int
encode_rdma_segment(struct xdr_stream *xdr, struct rpcrdma_mw *mw)
encode_rdma_segment(struct xdr_stream *xdr, struct rpcrdma_mr *mr)
{
__be32 *p;
@ -308,12 +308,12 @@ encode_rdma_segment(struct xdr_stream *xdr, struct rpcrdma_mw *mw)
if (unlikely(!p))
return -EMSGSIZE;
xdr_encode_rdma_segment(p, mw);
xdr_encode_rdma_segment(p, mr);
return 0;
}
static int
encode_read_segment(struct xdr_stream *xdr, struct rpcrdma_mw *mw,
encode_read_segment(struct xdr_stream *xdr, struct rpcrdma_mr *mr,
u32 position)
{
__be32 *p;
@ -324,7 +324,7 @@ encode_read_segment(struct xdr_stream *xdr, struct rpcrdma_mw *mw,
*p++ = xdr_one; /* Item present */
*p++ = cpu_to_be32(position);
xdr_encode_rdma_segment(p, mw);
xdr_encode_rdma_segment(p, mr);
return 0;
}
@ -348,7 +348,7 @@ rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
{
struct xdr_stream *xdr = &req->rl_stream;
struct rpcrdma_mr_seg *seg;
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
unsigned int pos;
int nsegs;
@ -363,21 +363,21 @@ rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
do {
seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
false, &mw);
false, &mr);
if (IS_ERR(seg))
return PTR_ERR(seg);
rpcrdma_push_mw(mw, &req->rl_registered);
rpcrdma_mr_push(mr, &req->rl_registered);
if (encode_read_segment(xdr, mw, pos) < 0)
if (encode_read_segment(xdr, mr, pos) < 0)
return -EMSGSIZE;
dprintk("RPC: %5u %s: pos %u %u@0x%016llx:0x%08x (%s)\n",
rqst->rq_task->tk_pid, __func__, pos,
mw->mw_length, (unsigned long long)mw->mw_offset,
mw->mw_handle, mw->mw_nents < nsegs ? "more" : "last");
mr->mr_length, (unsigned long long)mr->mr_offset,
mr->mr_handle, mr->mr_nents < nsegs ? "more" : "last");
r_xprt->rx_stats.read_chunk_count++;
nsegs -= mw->mw_nents;
nsegs -= mr->mr_nents;
} while (nsegs);
return 0;
@ -404,7 +404,7 @@ rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
{
struct xdr_stream *xdr = &req->rl_stream;
struct rpcrdma_mr_seg *seg;
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
int nsegs, nchunks;
__be32 *segcount;
@ -425,23 +425,23 @@ rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
nchunks = 0;
do {
seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
true, &mw);
true, &mr);
if (IS_ERR(seg))
return PTR_ERR(seg);
rpcrdma_push_mw(mw, &req->rl_registered);
rpcrdma_mr_push(mr, &req->rl_registered);
if (encode_rdma_segment(xdr, mw) < 0)
if (encode_rdma_segment(xdr, mr) < 0)
return -EMSGSIZE;
dprintk("RPC: %5u %s: %u@0x016%llx:0x%08x (%s)\n",
rqst->rq_task->tk_pid, __func__,
mw->mw_length, (unsigned long long)mw->mw_offset,
mw->mw_handle, mw->mw_nents < nsegs ? "more" : "last");
mr->mr_length, (unsigned long long)mr->mr_offset,
mr->mr_handle, mr->mr_nents < nsegs ? "more" : "last");
r_xprt->rx_stats.write_chunk_count++;
r_xprt->rx_stats.total_rdma_request += seg->mr_len;
nchunks++;
nsegs -= mw->mw_nents;
nsegs -= mr->mr_nents;
} while (nsegs);
/* Update count of segments in this Write chunk */
@ -468,7 +468,7 @@ rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
{
struct xdr_stream *xdr = &req->rl_stream;
struct rpcrdma_mr_seg *seg;
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
int nsegs, nchunks;
__be32 *segcount;
@ -487,23 +487,23 @@ rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
nchunks = 0;
do {
seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs,
true, &mw);
true, &mr);
if (IS_ERR(seg))
return PTR_ERR(seg);
rpcrdma_push_mw(mw, &req->rl_registered);
rpcrdma_mr_push(mr, &req->rl_registered);
if (encode_rdma_segment(xdr, mw) < 0)
if (encode_rdma_segment(xdr, mr) < 0)
return -EMSGSIZE;
dprintk("RPC: %5u %s: %u@0x%016llx:0x%08x (%s)\n",
rqst->rq_task->tk_pid, __func__,
mw->mw_length, (unsigned long long)mw->mw_offset,
mw->mw_handle, mw->mw_nents < nsegs ? "more" : "last");
mr->mr_length, (unsigned long long)mr->mr_offset,
mr->mr_handle, mr->mr_nents < nsegs ? "more" : "last");
r_xprt->rx_stats.reply_chunk_count++;
r_xprt->rx_stats.total_rdma_request += seg->mr_len;
nchunks++;
nsegs -= mw->mw_nents;
nsegs -= mr->mr_nents;
} while (nsegs);
/* Update count of segments in the Reply chunk */
@ -821,10 +821,10 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst)
* so these registrations are invalid and unusable.
*/
while (unlikely(!list_empty(&req->rl_registered))) {
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
mw = rpcrdma_pop_mw(&req->rl_registered);
rpcrdma_defer_mr_recovery(mw);
mr = rpcrdma_mr_pop(&req->rl_registered);
rpcrdma_mr_defer_recovery(mr);
}
/* This implementation supports the following combinations

119
net/sunrpc/xprtrdma/verbs.c
View File

@ -71,8 +71,8 @@
/*
* internal functions
*/
static void rpcrdma_create_mrs(struct rpcrdma_xprt *r_xprt);
static void rpcrdma_destroy_mrs(struct rpcrdma_buffer *buf);
static void rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt);
static void rpcrdma_mrs_destroy(struct rpcrdma_buffer *buf);
static void rpcrdma_dma_unmap_regbuf(struct rpcrdma_regbuf *rb);
struct workqueue_struct *rpcrdma_receive_wq __read_mostly;
@ -458,7 +458,7 @@ rpcrdma_ia_remove(struct rpcrdma_ia *ia)
rpcrdma_dma_unmap_regbuf(req->rl_sendbuf);
rpcrdma_dma_unmap_regbuf(req->rl_recvbuf);
}
rpcrdma_destroy_mrs(buf);
rpcrdma_mrs_destroy(buf);
/* Allow waiters to continue */
complete(&ia->ri_remove_done);
@ -671,7 +671,7 @@ rpcrdma_ep_recreate_xprt(struct rpcrdma_xprt *r_xprt,
goto out3;
}
rpcrdma_create_mrs(r_xprt);
rpcrdma_mrs_create(r_xprt);
return 0;
out3:
@ -992,15 +992,15 @@ rpcrdma_mr_recovery_worker(struct work_struct *work)
{
struct rpcrdma_buffer *buf = container_of(work, struct rpcrdma_buffer,
rb_recovery_worker.work);
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
spin_lock(&buf->rb_recovery_lock);
while (!list_empty(&buf->rb_stale_mrs)) {
mw = rpcrdma_pop_mw(&buf->rb_stale_mrs);
mr = rpcrdma_mr_pop(&buf->rb_stale_mrs);
spin_unlock(&buf->rb_recovery_lock);
dprintk("RPC: %s: recovering MR %p\n", __func__, mw);
mw->mw_xprt->rx_ia.ri_ops->ro_recover_mr(mw);
dprintk("RPC: %s: recovering MR %p\n", __func__, mr);
mr->mr_xprt->rx_ia.ri_ops->ro_recover_mr(mr);
spin_lock(&buf->rb_recovery_lock);
}
@ -1008,20 +1008,20 @@ rpcrdma_mr_recovery_worker(struct work_struct *work)
}
void
rpcrdma_defer_mr_recovery(struct rpcrdma_mw *mw)
rpcrdma_mr_defer_recovery(struct rpcrdma_mr *mr)
{
struct rpcrdma_xprt *r_xprt = mw->mw_xprt;
struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
spin_lock(&buf->rb_recovery_lock);
rpcrdma_push_mw(mw, &buf->rb_stale_mrs);
rpcrdma_mr_push(mr, &buf->rb_stale_mrs);
spin_unlock(&buf->rb_recovery_lock);
schedule_delayed_work(&buf->rb_recovery_worker, 0);
}
static void
rpcrdma_create_mrs(struct rpcrdma_xprt *r_xprt)
rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt)
{
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
@ -1030,30 +1030,30 @@ rpcrdma_create_mrs(struct rpcrdma_xprt *r_xprt)
LIST_HEAD(all);
for (count = 0; count < 32; count++) {
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
int rc;
mw = kzalloc(sizeof(*mw), GFP_KERNEL);
if (!mw)
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
break;
rc = ia->ri_ops->ro_init_mr(ia, mw);
rc = ia->ri_ops->ro_init_mr(ia, mr);
if (rc) {
kfree(mw);
kfree(mr);
break;
}
mw->mw_xprt = r_xprt;
mr->mr_xprt = r_xprt;
list_add(&mw->mw_list, &free);
list_add(&mw->mw_all, &all);
list_add(&mr->mr_list, &free);
list_add(&mr->mr_all, &all);
}
spin_lock(&buf->rb_mwlock);
list_splice(&free, &buf->rb_mws);
spin_lock(&buf->rb_mrlock);
list_splice(&free, &buf->rb_mrs);
list_splice(&all, &buf->rb_all);
r_xprt->rx_stats.mrs_allocated += count;
spin_unlock(&buf->rb_mwlock);
spin_unlock(&buf->rb_mrlock);
dprintk("RPC: %s: created %u MRs\n", __func__, count);
}
@ -1066,7 +1066,7 @@ rpcrdma_mr_refresh_worker(struct work_struct *work)
struct rpcrdma_xprt *r_xprt = container_of(buf, struct rpcrdma_xprt,
rx_buf);
rpcrdma_create_mrs(r_xprt);
rpcrdma_mrs_create(r_xprt);
}
struct rpcrdma_req *
@ -1144,10 +1144,10 @@ rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
buf->rb_max_requests = r_xprt->rx_data.max_requests;
buf->rb_bc_srv_max_requests = 0;
spin_lock_init(&buf->rb_mwlock);
spin_lock_init(&buf->rb_mrlock);
spin_lock_init(&buf->rb_lock);
spin_lock_init(&buf->rb_recovery_lock);
INIT_LIST_HEAD(&buf->rb_mws);
INIT_LIST_HEAD(&buf->rb_mrs);
INIT_LIST_HEAD(&buf->rb_all);
INIT_LIST_HEAD(&buf->rb_stale_mrs);
INIT_DELAYED_WORK(&buf->rb_refresh_worker,
@ -1155,7 +1155,7 @@ rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
INIT_DELAYED_WORK(&buf->rb_recovery_worker,
rpcrdma_mr_recovery_worker);
rpcrdma_create_mrs(r_xprt);
rpcrdma_mrs_create(r_xprt);
INIT_LIST_HEAD(&buf->rb_send_bufs);
INIT_LIST_HEAD(&buf->rb_allreqs);
@ -1229,26 +1229,26 @@ rpcrdma_destroy_req(struct rpcrdma_req *req)
}
static void
rpcrdma_destroy_mrs(struct rpcrdma_buffer *buf)
rpcrdma_mrs_destroy(struct rpcrdma_buffer *buf)
{
struct rpcrdma_xprt *r_xprt = container_of(buf, struct rpcrdma_xprt,
rx_buf);
struct rpcrdma_ia *ia = rdmab_to_ia(buf);
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
unsigned int count;
count = 0;
spin_lock(&buf->rb_mwlock);
spin_lock(&buf->rb_mrlock);
while (!list_empty(&buf->rb_all)) {
mw = list_entry(buf->rb_all.next, struct rpcrdma_mw, mw_all);
list_del(&mw->mw_all);
mr = list_entry(buf->rb_all.next, struct rpcrdma_mr, mr_all);
list_del(&mr->mr_all);
spin_unlock(&buf->rb_mwlock);
ia->ri_ops->ro_release_mr(mw);
spin_unlock(&buf->rb_mrlock);
ia->ri_ops->ro_release_mr(mr);
count++;
spin_lock(&buf->rb_mwlock);
spin_lock(&buf->rb_mrlock);
}
spin_unlock(&buf->rb_mwlock);
spin_unlock(&buf->rb_mrlock);
r_xprt->rx_stats.mrs_allocated = 0;
dprintk("RPC: %s: released %u MRs\n", __func__, count);
@ -1285,26 +1285,33 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
spin_unlock(&buf->rb_reqslock);
buf->rb_recv_count = 0;
rpcrdma_destroy_mrs(buf);
rpcrdma_mrs_destroy(buf);
}
struct rpcrdma_mw *
rpcrdma_get_mw(struct rpcrdma_xprt *r_xprt)
/**
* rpcrdma_mr_get - Allocate an rpcrdma_mr object
* @r_xprt: controlling transport
*
* Returns an initialized rpcrdma_mr or NULL if no free
* rpcrdma_mr objects are available.
*/
struct rpcrdma_mr *
rpcrdma_mr_get(struct rpcrdma_xprt *r_xprt)
{
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
struct rpcrdma_mw *mw = NULL;
struct rpcrdma_mr *mr = NULL;
spin_lock(&buf->rb_mwlock);
if (!list_empty(&buf->rb_mws))
mw = rpcrdma_pop_mw(&buf->rb_mws);
spin_unlock(&buf->rb_mwlock);
spin_lock(&buf->rb_mrlock);
if (!list_empty(&buf->rb_mrs))
mr = rpcrdma_mr_pop(&buf->rb_mrs);
spin_unlock(&buf->rb_mrlock);
if (!mw)
goto out_nomws;
return mw;
if (!mr)
goto out_nomrs;
return mr;
out_nomws:
dprintk("RPC: %s: no MWs available\n", __func__);
out_nomrs:
dprintk("RPC: %s: no MRs available\n", __func__);
if (r_xprt->rx_ep.rep_connected != -ENODEV)
schedule_delayed_work(&buf->rb_refresh_worker, 0);
@ -1314,14 +1321,20 @@ out_nomws:
return NULL;
}
/**
* rpcrdma_mr_put - Release an rpcrdma_mr object
* @mr: object to release
*
*/
void
rpcrdma_put_mw(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mw *mw)
rpcrdma_mr_put(struct rpcrdma_mr *mr)
{
struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
spin_lock(&buf->rb_mwlock);
rpcrdma_push_mw(mw, &buf->rb_mws);
spin_unlock(&buf->rb_mwlock);
spin_lock(&buf->rb_mrlock);
rpcrdma_mr_push(mr, &buf->rb_mrs);
spin_unlock(&buf->rb_mrlock);
}
static struct rpcrdma_rep *

62
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -230,12 +230,12 @@ enum {
};
/*
* struct rpcrdma_mw - external memory region metadata
* struct rpcrdma_mr - external memory region metadata
*
* An external memory region is any buffer or page that is registered
* on the fly (ie, not pre-registered).
*
* Each rpcrdma_buffer has a list of free MWs anchored in rb_mws. During
* Each rpcrdma_buffer has a list of free MWs anchored in rb_mrs. During
* call_allocate, rpcrdma_buffer_get() assigns one to each segment in
* an rpcrdma_req. Then rpcrdma_register_external() grabs these to keep
* track of registration metadata while each RPC is pending.
@ -265,20 +265,20 @@ struct rpcrdma_fmr {
u64 *fm_physaddrs;
};
struct rpcrdma_mw {
struct list_head mw_list;
struct scatterlist *mw_sg;
int mw_nents;
enum dma_data_direction mw_dir;
struct rpcrdma_mr {
struct list_head mr_list;
struct scatterlist *mr_sg;
int mr_nents;
enum dma_data_direction mr_dir;
union {
struct rpcrdma_fmr fmr;
struct rpcrdma_frwr frwr;
};
struct rpcrdma_xprt *mw_xprt;
u32 mw_handle;
u32 mw_length;
u64 mw_offset;
struct list_head mw_all;
struct rpcrdma_xprt *mr_xprt;
u32 mr_handle;
u32 mr_length;
u64 mr_offset;
struct list_head mr_all;
};
/*
@ -371,19 +371,19 @@ rpcr_to_rdmar(struct rpc_rqst *rqst)
}
static inline void
rpcrdma_push_mw(struct rpcrdma_mw *mw, struct list_head *list)
rpcrdma_mr_push(struct rpcrdma_mr *mr, struct list_head *list)
{
list_add_tail(&mw->mw_list, list);
list_add_tail(&mr->mr_list, list);
}
static inline struct rpcrdma_mw *
rpcrdma_pop_mw(struct list_head *list)
static inline struct rpcrdma_mr *
rpcrdma_mr_pop(struct list_head *list)
{
struct rpcrdma_mw *mw;
struct rpcrdma_mr *mr;
mw = list_first_entry(list, struct rpcrdma_mw, mw_list);
list_del(&mw->mw_list);
return mw;
mr = list_first_entry(list, struct rpcrdma_mr, mr_list);
list_del(&mr->mr_list);
return mr;
}
/*
@ -393,8 +393,8 @@ rpcrdma_pop_mw(struct list_head *list)
* One of these is associated with a transport instance
*/
struct rpcrdma_buffer {
spinlock_t rb_mwlock; /* protect rb_mws list */
struct list_head rb_mws;
spinlock_t rb_mrlock; /* protect rb_mrs list */
struct list_head rb_mrs;
struct list_head rb_all;
unsigned long rb_sc_head;
@ -473,19 +473,19 @@ struct rpcrdma_memreg_ops {
struct rpcrdma_mr_seg *
(*ro_map)(struct rpcrdma_xprt *,
struct rpcrdma_mr_seg *, int, bool,
struct rpcrdma_mw **);
struct rpcrdma_mr **);
void (*ro_reminv)(struct rpcrdma_rep *rep,
struct list_head *mws);
struct list_head *mrs);
void (*ro_unmap_sync)(struct rpcrdma_xprt *,
struct list_head *);
void (*ro_recover_mr)(struct rpcrdma_mw *);
void (*ro_recover_mr)(struct rpcrdma_mr *mr);
int (*ro_open)(struct rpcrdma_ia *,
struct rpcrdma_ep *,
struct rpcrdma_create_data_internal *);
size_t (*ro_maxpages)(struct rpcrdma_xprt *);
int (*ro_init_mr)(struct rpcrdma_ia *,
struct rpcrdma_mw *);
void (*ro_release_mr)(struct rpcrdma_mw *);
struct rpcrdma_mr *);
void (*ro_release_mr)(struct rpcrdma_mr *mr);
const char *ro_displayname;
const int ro_send_w_inv_ok;
};
@ -574,15 +574,15 @@ void rpcrdma_buffer_destroy(struct rpcrdma_buffer *);
struct rpcrdma_sendctx *rpcrdma_sendctx_get_locked(struct rpcrdma_buffer *buf);
void rpcrdma_sendctx_put_locked(struct rpcrdma_sendctx *sc);
struct rpcrdma_mw *rpcrdma_get_mw(struct rpcrdma_xprt *);
void rpcrdma_put_mw(struct rpcrdma_xprt *, struct rpcrdma_mw *);
struct rpcrdma_mr *rpcrdma_mr_get(struct rpcrdma_xprt *r_xprt);
void rpcrdma_mr_put(struct rpcrdma_mr *mr);
void rpcrdma_mr_defer_recovery(struct rpcrdma_mr *mr);
struct rpcrdma_req *rpcrdma_buffer_get(struct rpcrdma_buffer *);
void rpcrdma_buffer_put(struct rpcrdma_req *);
void rpcrdma_recv_buffer_get(struct rpcrdma_req *);
void rpcrdma_recv_buffer_put(struct rpcrdma_rep *);
void rpcrdma_defer_mr_recovery(struct rpcrdma_mw *);
struct rpcrdma_regbuf *rpcrdma_alloc_regbuf(size_t, enum dma_data_direction,
gfp_t);
bool __rpcrdma_dma_map_regbuf(struct rpcrdma_ia *, struct rpcrdma_regbuf *);