License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 21:07:57 +07:00
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// SPDX-License-Identifier: GPL-2.0
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2015-03-31 01:34:21 +07:00
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/*
|
2017-12-15 08:57:55 +07:00
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* Copyright (c) 2015, 2017 Oracle. All rights reserved.
|
2015-03-31 01:34:21 +07:00
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* Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
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*/
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/* Lightweight memory registration using Fast Memory Regions (FMR).
|
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* Referred to sometimes as MTHCAFMR mode.
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*
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* FMR uses synchronous memory registration and deregistration.
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* FMR registration is known to be fast, but FMR deregistration
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* can take tens of usecs to complete.
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*/
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2015-05-26 22:52:16 +07:00
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/* Normal operation
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*
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* A Memory Region is prepared for RDMA READ or WRITE using the
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* ib_map_phys_fmr verb (fmr_op_map). When the RDMA operation is
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* finished, the Memory Region is unmapped using the ib_unmap_fmr
|
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* verb (fmr_op_unmap).
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*/
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2018-05-08 02:27:16 +07:00
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#include <linux/sunrpc/svc_rdma.h>
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|
2015-03-31 01:34:21 +07:00
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#include "xprt_rdma.h"
|
2018-05-08 02:27:05 +07:00
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#include <trace/events/rpcrdma.h>
|
2015-03-31 01:34:21 +07:00
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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# define RPCDBG_FACILITY RPCDBG_TRANS
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#endif
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|
2015-03-31 01:34:30 +07:00
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/* Maximum scatter/gather per FMR */
|
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|
|
#define RPCRDMA_MAX_FMR_SGES (64)
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|
2016-06-30 00:52:29 +07:00
|
|
|
/* Access mode of externally registered pages */
|
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|
|
enum {
|
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|
|
RPCRDMA_FMR_ACCESS_FLAGS = IB_ACCESS_REMOTE_WRITE |
|
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|
|
IB_ACCESS_REMOTE_READ,
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|
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};
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|
2016-06-30 00:53:27 +07:00
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bool
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fmr_is_supported(struct rpcrdma_ia *ia)
|
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|
|
{
|
|
|
|
if (!ia->ri_device->alloc_fmr) {
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|
|
pr_info("rpcrdma: 'fmr' mode is not supported by device %s\n",
|
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ia->ri_device->name);
|
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return false;
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|
}
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return true;
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|
|
}
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|
2016-06-30 00:52:29 +07:00
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static int
|
2017-12-15 08:57:55 +07:00
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fmr_op_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr)
|
2016-06-30 00:52:29 +07:00
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|
|
{
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static struct ib_fmr_attr fmr_attr = {
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.max_pages = RPCRDMA_MAX_FMR_SGES,
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.max_maps = 1,
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|
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.page_shift = PAGE_SHIFT
|
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|
|
};
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|
2017-12-15 08:57:55 +07:00
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mr->fmr.fm_physaddrs = kcalloc(RPCRDMA_MAX_FMR_SGES,
|
2016-06-30 00:52:37 +07:00
|
|
|
sizeof(u64), GFP_KERNEL);
|
2017-12-15 08:57:55 +07:00
|
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|
if (!mr->fmr.fm_physaddrs)
|
2016-06-30 00:52:29 +07:00
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|
goto out_free;
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|
2017-12-15 08:57:55 +07:00
|
|
|
mr->mr_sg = kcalloc(RPCRDMA_MAX_FMR_SGES,
|
|
|
|
sizeof(*mr->mr_sg), GFP_KERNEL);
|
|
|
|
if (!mr->mr_sg)
|
2016-06-30 00:52:29 +07:00
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|
goto out_free;
|
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|
2017-12-15 08:57:55 +07:00
|
|
|
sg_init_table(mr->mr_sg, RPCRDMA_MAX_FMR_SGES);
|
2016-06-30 00:52:29 +07:00
|
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|
2017-12-15 08:57:55 +07:00
|
|
|
mr->fmr.fm_mr = ib_alloc_fmr(ia->ri_pd, RPCRDMA_FMR_ACCESS_FLAGS,
|
2016-06-30 00:52:37 +07:00
|
|
|
&fmr_attr);
|
2017-12-15 08:57:55 +07:00
|
|
|
if (IS_ERR(mr->fmr.fm_mr))
|
2016-06-30 00:52:29 +07:00
|
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|
goto out_fmr_err;
|
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|
xprtrdma: Fix list corruption / DMAR errors during MR recovery
The ro_release_mr methods check whether mr->mr_list is empty.
Therefore, be sure to always use list_del_init when removing an MR
linked into a list using that field. Otherwise, when recovering from
transport failures or device removal, list corruption can result, or
MRs can get mapped or unmapped an odd number of times, resulting in
IOMMU-related failures.
In general this fix is appropriate back to v4.8. However, code
changes since then make it impossible to apply this patch directly
to stable kernels. The fix would have to be applied by hand or
reworked for kernels earlier than v4.16.
Backport guidance -- there are several cases:
- When creating an MR, initialize mr_list so that using list_empty
on an as-yet-unused MR is safe.
- When an MR is being handled by the remote invalidation path,
ensure that mr_list is reinitialized when it is removed from
rl_registered.
- When an MR is being handled by rpcrdma_destroy_mrs, it is removed
from mr_all, but it may still be on an rl_registered list. In
that case, the MR needs to be removed from that list before being
released.
- Other cases are covered by using list_del_init in rpcrdma_mr_pop.
Fixes: 9d6b04097882 ('xprtrdma: Place registered MWs on a ... ')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2018-05-01 22:37:14 +07:00
|
|
|
INIT_LIST_HEAD(&mr->mr_list);
|
2016-06-30 00:52:29 +07:00
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|
return 0;
|
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out_fmr_err:
|
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|
dprintk("RPC: %s: ib_alloc_fmr returned %ld\n", __func__,
|
2017-12-15 08:57:55 +07:00
|
|
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PTR_ERR(mr->fmr.fm_mr));
|
2016-06-30 00:52:29 +07:00
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out_free:
|
2017-12-15 08:57:55 +07:00
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kfree(mr->mr_sg);
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|
kfree(mr->fmr.fm_physaddrs);
|
2016-06-30 00:52:29 +07:00
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|
return -ENOMEM;
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|
}
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|
2016-05-03 01:42:46 +07:00
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static int
|
2017-12-15 08:57:55 +07:00
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|
__fmr_unmap(struct rpcrdma_mr *mr)
|
2016-05-03 01:42:46 +07:00
|
|
|
{
|
|
|
|
LIST_HEAD(l);
|
2016-06-30 00:52:12 +07:00
|
|
|
int rc;
|
2016-05-03 01:42:46 +07:00
|
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|
2017-12-15 08:57:55 +07:00
|
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|
list_add(&mr->fmr.fm_mr->list, &l);
|
2016-06-30 00:52:12 +07:00
|
|
|
rc = ib_unmap_fmr(&l);
|
2017-12-15 08:57:55 +07:00
|
|
|
list_del(&mr->fmr.fm_mr->list);
|
2016-06-30 00:52:12 +07:00
|
|
|
return rc;
|
2016-05-03 01:42:46 +07:00
|
|
|
}
|
|
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|
|
2016-06-30 00:52:29 +07:00
|
|
|
static void
|
2017-12-15 08:57:55 +07:00
|
|
|
fmr_op_release_mr(struct rpcrdma_mr *mr)
|
2016-06-30 00:52:29 +07:00
|
|
|
{
|
2016-06-30 00:52:54 +07:00
|
|
|
LIST_HEAD(unmap_list);
|
2016-06-30 00:52:29 +07:00
|
|
|
int rc;
|
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
kfree(mr->fmr.fm_physaddrs);
|
|
|
|
kfree(mr->mr_sg);
|
2016-06-30 00:52:29 +07:00
|
|
|
|
2016-06-30 00:52:54 +07:00
|
|
|
/* In case this one was left mapped, try to unmap it
|
|
|
|
* to prevent dealloc_fmr from failing with EBUSY
|
|
|
|
*/
|
2017-12-15 08:57:55 +07:00
|
|
|
rc = __fmr_unmap(mr);
|
2016-06-30 00:52:54 +07:00
|
|
|
if (rc)
|
|
|
|
pr_err("rpcrdma: final ib_unmap_fmr for %p failed %i\n",
|
2017-12-15 08:57:55 +07:00
|
|
|
mr, rc);
|
2016-06-30 00:52:54 +07:00
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
rc = ib_dealloc_fmr(mr->fmr.fm_mr);
|
2016-06-30 00:52:29 +07:00
|
|
|
if (rc)
|
|
|
|
pr_err("rpcrdma: final ib_dealloc_fmr for %p returned %i\n",
|
2017-12-15 08:57:55 +07:00
|
|
|
mr, rc);
|
2016-06-30 00:54:00 +07:00
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|
2017-12-15 08:57:55 +07:00
|
|
|
kfree(mr);
|
2016-06-30 00:52:29 +07:00
|
|
|
}
|
|
|
|
|
2016-06-30 00:52:54 +07:00
|
|
|
/* Reset of a single FMR.
|
2016-05-03 01:42:46 +07:00
|
|
|
*/
|
|
|
|
static void
|
2017-12-15 08:57:55 +07:00
|
|
|
fmr_op_recover_mr(struct rpcrdma_mr *mr)
|
2016-05-03 01:42:46 +07:00
|
|
|
{
|
2017-12-15 08:57:55 +07:00
|
|
|
struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
|
2016-06-30 00:52:54 +07:00
|
|
|
int rc;
|
2016-05-03 01:42:46 +07:00
|
|
|
|
2016-06-30 00:52:54 +07:00
|
|
|
/* ORDER: invalidate first */
|
2017-12-15 08:57:55 +07:00
|
|
|
rc = __fmr_unmap(mr);
|
2016-06-30 00:54:08 +07:00
|
|
|
if (rc)
|
|
|
|
goto out_release;
|
2016-06-30 00:52:54 +07:00
|
|
|
|
2017-12-15 08:58:04 +07:00
|
|
|
/* ORDER: then DMA unmap */
|
|
|
|
rpcrdma_mr_unmap_and_put(mr);
|
|
|
|
|
2016-06-30 00:52:54 +07:00
|
|
|
r_xprt->rx_stats.mrs_recovered++;
|
2016-06-30 00:54:08 +07:00
|
|
|
return;
|
|
|
|
|
|
|
|
out_release:
|
2017-12-15 08:57:55 +07:00
|
|
|
pr_err("rpcrdma: FMR reset failed (%d), %p released\n", rc, mr);
|
2016-06-30 00:54:08 +07:00
|
|
|
r_xprt->rx_stats.mrs_orphaned++;
|
|
|
|
|
2017-12-21 04:31:12 +07:00
|
|
|
trace_xprtrdma_dma_unmap(mr);
|
2017-12-15 08:58:04 +07:00
|
|
|
ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
|
|
|
|
mr->mr_sg, mr->mr_nents, mr->mr_dir);
|
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
spin_lock(&r_xprt->rx_buf.rb_mrlock);
|
|
|
|
list_del(&mr->mr_all);
|
|
|
|
spin_unlock(&r_xprt->rx_buf.rb_mrlock);
|
2016-06-30 00:54:08 +07:00
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
fmr_op_release_mr(mr);
|
2016-05-03 01:42:46 +07:00
|
|
|
}
|
|
|
|
|
2018-05-05 02:34:48 +07:00
|
|
|
/* On success, sets:
|
|
|
|
* ep->rep_attr.cap.max_send_wr
|
|
|
|
* ep->rep_attr.cap.max_recv_wr
|
|
|
|
* cdata->max_requests
|
|
|
|
* ia->ri_max_segs
|
|
|
|
*/
|
2015-03-31 01:35:26 +07:00
|
|
|
static int
|
|
|
|
fmr_op_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep,
|
|
|
|
struct rpcrdma_create_data_internal *cdata)
|
|
|
|
{
|
2018-05-05 02:34:48 +07:00
|
|
|
int max_qp_wr;
|
|
|
|
|
|
|
|
max_qp_wr = ia->ri_device->attrs.max_qp_wr;
|
|
|
|
max_qp_wr -= RPCRDMA_BACKWARD_WRS;
|
|
|
|
max_qp_wr -= 1;
|
|
|
|
if (max_qp_wr < RPCRDMA_MIN_SLOT_TABLE)
|
|
|
|
return -ENOMEM;
|
|
|
|
if (cdata->max_requests > max_qp_wr)
|
|
|
|
cdata->max_requests = max_qp_wr;
|
|
|
|
ep->rep_attr.cap.max_send_wr = cdata->max_requests;
|
|
|
|
ep->rep_attr.cap.max_send_wr += RPCRDMA_BACKWARD_WRS;
|
|
|
|
ep->rep_attr.cap.max_send_wr += 1; /* for ib_drain_sq */
|
|
|
|
ep->rep_attr.cap.max_recv_wr = cdata->max_requests;
|
|
|
|
ep->rep_attr.cap.max_recv_wr += RPCRDMA_BACKWARD_WRS;
|
|
|
|
ep->rep_attr.cap.max_recv_wr += 1; /* for ib_drain_rq */
|
|
|
|
|
2016-09-15 21:57:07 +07:00
|
|
|
ia->ri_max_segs = max_t(unsigned int, 1, RPCRDMA_MAX_DATA_SEGS /
|
|
|
|
RPCRDMA_MAX_FMR_SGES);
|
2015-03-31 01:35:26 +07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-03-31 01:34:30 +07:00
|
|
|
/* FMR mode conveys up to 64 pages of payload per chunk segment.
|
|
|
|
*/
|
|
|
|
static size_t
|
|
|
|
fmr_op_maxpages(struct rpcrdma_xprt *r_xprt)
|
|
|
|
{
|
|
|
|
return min_t(unsigned int, RPCRDMA_MAX_DATA_SEGS,
|
2016-05-03 01:40:56 +07:00
|
|
|
RPCRDMA_MAX_HDR_SEGS * RPCRDMA_MAX_FMR_SGES);
|
2015-03-31 01:34:30 +07:00
|
|
|
}
|
|
|
|
|
2015-03-31 01:34:39 +07:00
|
|
|
/* Use the ib_map_phys_fmr() verb to register a memory region
|
|
|
|
* for remote access via RDMA READ or RDMA WRITE.
|
|
|
|
*/
|
2017-08-15 02:38:30 +07:00
|
|
|
static struct rpcrdma_mr_seg *
|
2015-03-31 01:34:39 +07:00
|
|
|
fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
|
2017-12-15 08:57:55 +07:00
|
|
|
int nsegs, bool writing, struct rpcrdma_mr **out)
|
2015-03-31 01:34:39 +07:00
|
|
|
{
|
|
|
|
struct rpcrdma_mr_seg *seg1 = seg;
|
|
|
|
int len, pageoff, i, rc;
|
2017-12-15 08:57:55 +07:00
|
|
|
struct rpcrdma_mr *mr;
|
2016-06-30 00:52:45 +07:00
|
|
|
u64 *dma_pages;
|
2015-05-26 22:52:16 +07:00
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
mr = rpcrdma_mr_get(r_xprt);
|
|
|
|
if (!mr)
|
2018-03-01 03:30:44 +07:00
|
|
|
return ERR_PTR(-EAGAIN);
|
2015-03-31 01:34:39 +07:00
|
|
|
|
|
|
|
pageoff = offset_in_page(seg1->mr_offset);
|
|
|
|
seg1->mr_offset -= pageoff; /* start of page */
|
|
|
|
seg1->mr_len += pageoff;
|
|
|
|
len = -pageoff;
|
|
|
|
if (nsegs > RPCRDMA_MAX_FMR_SGES)
|
|
|
|
nsegs = RPCRDMA_MAX_FMR_SGES;
|
|
|
|
for (i = 0; i < nsegs;) {
|
2016-06-30 00:52:45 +07:00
|
|
|
if (seg->mr_page)
|
2017-12-15 08:57:55 +07:00
|
|
|
sg_set_page(&mr->mr_sg[i],
|
2016-06-30 00:52:45 +07:00
|
|
|
seg->mr_page,
|
|
|
|
seg->mr_len,
|
|
|
|
offset_in_page(seg->mr_offset));
|
|
|
|
else
|
2017-12-15 08:57:55 +07:00
|
|
|
sg_set_buf(&mr->mr_sg[i], seg->mr_offset,
|
2016-06-30 00:52:45 +07:00
|
|
|
seg->mr_len);
|
2015-03-31 01:34:39 +07:00
|
|
|
len += seg->mr_len;
|
|
|
|
++seg;
|
|
|
|
++i;
|
|
|
|
/* Check for holes */
|
|
|
|
if ((i < nsegs && offset_in_page(seg->mr_offset)) ||
|
|
|
|
offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len))
|
|
|
|
break;
|
|
|
|
}
|
2017-12-15 08:57:55 +07:00
|
|
|
mr->mr_dir = rpcrdma_data_dir(writing);
|
2016-06-30 00:52:45 +07:00
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
mr->mr_nents = ib_dma_map_sg(r_xprt->rx_ia.ri_device,
|
|
|
|
mr->mr_sg, i, mr->mr_dir);
|
|
|
|
if (!mr->mr_nents)
|
2016-06-30 00:52:45 +07:00
|
|
|
goto out_dmamap_err;
|
2018-05-05 02:36:02 +07:00
|
|
|
trace_xprtrdma_dma_map(mr);
|
2015-03-31 01:34:39 +07:00
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
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,
|
2016-06-30 00:52:45 +07:00
|
|
|
dma_pages[0]);
|
2015-03-31 01:34:39 +07:00
|
|
|
if (rc)
|
|
|
|
goto out_maperr;
|
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
mr->mr_handle = mr->fmr.fm_mr->rkey;
|
|
|
|
mr->mr_length = len;
|
|
|
|
mr->mr_offset = dma_pages[0] + pageoff;
|
2016-06-30 00:54:16 +07:00
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
*out = mr;
|
2017-08-15 02:38:30 +07:00
|
|
|
return seg;
|
2016-06-30 00:52:45 +07:00
|
|
|
|
|
|
|
out_dmamap_err:
|
2017-06-08 22:52:36 +07:00
|
|
|
pr_err("rpcrdma: failed to DMA map sg %p sg_nents %d\n",
|
2017-12-15 08:57:55 +07:00
|
|
|
mr->mr_sg, i);
|
|
|
|
rpcrdma_mr_put(mr);
|
2017-08-15 02:38:30 +07:00
|
|
|
return ERR_PTR(-EIO);
|
2015-03-31 01:34:39 +07:00
|
|
|
|
|
|
|
out_maperr:
|
2016-06-30 00:52:45 +07:00
|
|
|
pr_err("rpcrdma: ib_map_phys_fmr %u@0x%llx+%i (%d) status %i\n",
|
|
|
|
len, (unsigned long long)dma_pages[0],
|
2017-12-15 08:57:55 +07:00
|
|
|
pageoff, mr->mr_nents, rc);
|
2017-12-15 08:58:04 +07:00
|
|
|
rpcrdma_mr_unmap_and_put(mr);
|
2017-08-15 02:38:30 +07:00
|
|
|
return ERR_PTR(-EIO);
|
2015-03-31 01:34:39 +07:00
|
|
|
}
|
|
|
|
|
2018-03-01 03:30:59 +07:00
|
|
|
/* Post Send WR containing the RPC Call message.
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
fmr_op_send(struct rpcrdma_ia *ia, struct rpcrdma_req *req)
|
|
|
|
{
|
|
|
|
struct ib_send_wr *bad_wr;
|
|
|
|
|
|
|
|
return ib_post_send(ia->ri_id->qp, &req->rl_sendctx->sc_wr, &bad_wr);
|
|
|
|
}
|
|
|
|
|
2015-12-17 05:22:55 +07:00
|
|
|
/* Invalidate all memory regions that were registered for "req".
|
|
|
|
*
|
|
|
|
* Sleeps until it is safe for the host CPU to access the
|
|
|
|
* previously mapped memory regions.
|
2016-06-30 00:54:16 +07:00
|
|
|
*
|
2017-12-15 08:57:55 +07:00
|
|
|
* Caller ensures that @mrs is not empty before the call. This
|
2017-06-08 22:52:04 +07:00
|
|
|
* function empties the list.
|
2015-12-17 05:22:55 +07:00
|
|
|
*/
|
|
|
|
static void
|
2017-12-15 08:57:55 +07:00
|
|
|
fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mrs)
|
2015-12-17 05:22:55 +07:00
|
|
|
{
|
2017-12-15 08:57:55 +07:00
|
|
|
struct rpcrdma_mr *mr;
|
2015-12-17 05:22:55 +07:00
|
|
|
LIST_HEAD(unmap_list);
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
/* ORDER: Invalidate all of the req's MRs first
|
|
|
|
*
|
|
|
|
* ib_unmap_fmr() is slow, so use a single call instead
|
2016-06-30 00:52:54 +07:00
|
|
|
* of one call per mapped FMR.
|
2015-12-17 05:22:55 +07:00
|
|
|
*/
|
2017-12-15 08:57:55 +07:00
|
|
|
list_for_each_entry(mr, mrs, mr_list) {
|
2017-06-08 22:52:04 +07:00
|
|
|
dprintk("RPC: %s: unmapping fmr %p\n",
|
2017-12-15 08:57:55 +07:00
|
|
|
__func__, &mr->fmr);
|
2017-12-21 04:31:12 +07:00
|
|
|
trace_xprtrdma_localinv(mr);
|
2017-12-15 08:57:55 +07:00
|
|
|
list_add_tail(&mr->fmr.fm_mr->list, &unmap_list);
|
2017-06-08 22:52:04 +07:00
|
|
|
}
|
2016-09-15 21:57:16 +07:00
|
|
|
r_xprt->rx_stats.local_inv_needed++;
|
2015-12-17 05:22:55 +07:00
|
|
|
rc = ib_unmap_fmr(&unmap_list);
|
|
|
|
if (rc)
|
2016-06-30 00:52:54 +07:00
|
|
|
goto out_reset;
|
2015-12-17 05:22:55 +07:00
|
|
|
|
|
|
|
/* ORDER: Now DMA unmap all of the req's MRs, and return
|
|
|
|
* them to the free MW list.
|
|
|
|
*/
|
2017-12-15 08:57:55 +07:00
|
|
|
while (!list_empty(mrs)) {
|
|
|
|
mr = rpcrdma_mr_pop(mrs);
|
|
|
|
list_del(&mr->fmr.fm_mr->list);
|
2017-12-15 08:58:04 +07:00
|
|
|
rpcrdma_mr_unmap_and_put(mr);
|
2015-12-17 05:22:55 +07:00
|
|
|
}
|
|
|
|
|
2016-06-30 00:52:54 +07:00
|
|
|
return;
|
|
|
|
|
|
|
|
out_reset:
|
|
|
|
pr_err("rpcrdma: ib_unmap_fmr failed (%i)\n", rc);
|
|
|
|
|
2017-12-15 08:57:55 +07:00
|
|
|
while (!list_empty(mrs)) {
|
|
|
|
mr = rpcrdma_mr_pop(mrs);
|
|
|
|
list_del(&mr->fmr.fm_mr->list);
|
|
|
|
fmr_op_recover_mr(mr);
|
2016-06-30 00:52:54 +07:00
|
|
|
}
|
2015-12-17 05:22:55 +07:00
|
|
|
}
|
|
|
|
|
2015-03-31 01:34:21 +07:00
|
|
|
const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops = {
|
2015-03-31 01:34:39 +07:00
|
|
|
.ro_map = fmr_op_map,
|
2018-03-01 03:30:59 +07:00
|
|
|
.ro_send = fmr_op_send,
|
2015-12-17 05:22:55 +07:00
|
|
|
.ro_unmap_sync = fmr_op_unmap_sync,
|
2016-06-30 00:52:54 +07:00
|
|
|
.ro_recover_mr = fmr_op_recover_mr,
|
2015-03-31 01:35:26 +07:00
|
|
|
.ro_open = fmr_op_open,
|
2015-03-31 01:34:30 +07:00
|
|
|
.ro_maxpages = fmr_op_maxpages,
|
2016-06-30 00:54:00 +07:00
|
|
|
.ro_init_mr = fmr_op_init_mr,
|
|
|
|
.ro_release_mr = fmr_op_release_mr,
|
2015-03-31 01:34:21 +07:00
|
|
|
.ro_displayname = "fmr",
|
2016-09-15 21:57:16 +07:00
|
|
|
.ro_send_w_inv_ok = 0,
|
2015-03-31 01:34:21 +07:00
|
|
|
};
|