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There are three cases where svc_xprt_do_enqueue() returns without
waking an nfsd thread:
1. There is no work to do
2. The transport is already busy
3. There are no available nfsd threads
Only 3. is truly interesting. Move the trace point so it records
that there was work to do and either an nfsd thread was awoken, or
a free one could not found.
As an additional clean up, remove a redundant comment and a couple
of dprintk call sites.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Reduce the amount of noise generated by trace_svc_xprt_dequeue by
moving it to the end of svc_get_next_xprt. This generates exactly
one trace event when a ready xprt is found, rather than spurious
events when there is no work to do. The empty events contain no
information that can't be obtained simply by tracing function calls
to svc_xprt_dequeue.
A small additional benefit is simplification of the svc_xprt_event
trace class, which no longer has to handle the case when the @xprt
parameter is NULL.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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XPT_KILL_TEMP was added by commit 546125d16142 ("sunrpc: don't call
sleeping functions from the notifier block callbacks"), and
XPT_CONG_CTRL was added by commit 362142b25843 ("sunrpc: flag
transports as having congestion control") .
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Clean up: Instead of returning a value that is used to set or clear
a bit, just make ->xpo_secure_port mangle that bit, and return void.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Clean up: Noticed during code inspection that there is already a
local automatic variable "xprt" so dereferencing rqst->rq_xprt
again is unnecessary.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Use enum nfs_cb_opnum4 in decode_cb_op_status. This fixes warnings
seen with clang:
fs/nfsd/nfs4callback.c:451:36: warning: implicit conversion from
enumeration type 'enum nfs_cb_opnum4' to different enumeration
type 'enum nfs_opnum4' [-Wenum-conversion]
status = decode_cb_op_status(xdr, OP_CB_SEQUENCE, &cb->cb_seq_status);
~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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fs/nfsd/nfs4state.c:926:8-9: WARNING: return of 0/1 in function 'nfs4_delegation_exists' with return type bool
fs/nfsd/nfs4state.c:2955:9-10: WARNING: return of 0/1 in function 'nfsd4_compound_in_session' with return type bool
Return statements in functions returning bool should use
true/false instead of 1/0.
Generated by: scripts/coccinelle/misc/boolreturn.cocci
Fixes: 68b18f52947b ("nfsd: make nfs4_get_existing_delegation less confusing")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
[bfields: also fix -EAGAIN]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull SPI updates from Mark Brown:
"A quiet release for SPI, some fixes and small updates for individual
drivers with one bigger change from Linus Walleij which coverts the
bitbanging SPI driver to use the GPIO descriptor API from Linus
Walleij.
Since GPIO descriptors were used by platform data this means there's a
few changes in arch/ making relevant updates for a few platforms and
one misc driver that are affected"
* tag 'spi-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (24 commits)
MAINTAINERS: update Andi's e-mail
spi: spi-atmel: Use correct enum for DMA transfer direction
spi: sh-msiof: Document R-Car M3-N support
spi: sh-msiof: Use correct enum for DMA transfer direction
spi: sprd: Add the support of restarting the system
spi: sprd: Simplify the transfer function
spi: Fix unregistration of controller with fixed SPI bus number
spi: rspi: use correct enum for DMA transfer direction
spi: jcore: disable ref_clk after getting its rate
spi: bcm-qspi: fIX some error handling paths
spi: pxa2xx: Disable runtime PM if controller registration fails
spi: tegra20-slink: use true and false for boolean values
spi: Fix scatterlist elements size in spi_map_buf
spi: atmel: init FIFOs before spi enable
spi: orion: Prepare space for per-child options
spi: orion: Make the error message greppable
spi: orion: Rework GPIO CS handling
spi: bcm2835aux: Avoid 64-bit arithmetic in xfer len calc
spi: spi-gpio: Augment device tree bindings
spi: spi-gpio: Rewrite to use GPIO descriptors
...
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This allows platforms that are CPU/memory contrained to verify data
blocks only the first time they are read from the data device, rather
than every time. As such, it provides a reduced level of security
because only offline tampering of the data device's content will be
detected, not online tampering.
Hash blocks are still verified each time they are read from the hash
device, since verification of hash blocks is less performance critical
than data blocks, and a hash block will not be verified any more after
all the data blocks it covers have been verified anyway.
This option introduces a bitset that is used to check if a block has
been validated before or not. A block can be validated more than once
as there is no thread protection for the bitset.
These changes were developed and tested on entry-level Android Go
devices.
Signed-off-by: Patrik Torstensson <totte@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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The bio structure consumes a substantial part of dm_buffer. The bio
structure is only needed when doing I/O on the buffer, thus we don't
have to embed it in the buffer.
Allocate the bio structure only when doing I/O.
We don't need to create a bio_set because, in case of allocation
failure, dm-bufio falls back to using dm-io (which keeps its own
bio_set).
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Support block sizes that are not a power-of-two (but they must be a
multiple of 512b). As always, a slab cache is used for allocations.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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kmalloc padded to the next power of two, using a slab cache avoids this.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Reorder fields in dm_buffer structure to improve packing and reduce
structure size. The compiler allocates 32-bit integer for field 'enum
data_mode', so change it to unsigned char.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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The I/O buffer doesn't have to be aligned on block size granularity,
relax alignment to ARCH_KMALLOC_MINALIGN (required to allow DMA from
slab cache memory on some architectures).
Also, set SLAB_RECLAIM_ACCOUNT so that the memory allocated from the
cache is accounted as reclaimable and doesn't inflate the 'used' entry
in the free command.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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All slab allocators can merge duplicate caches. So dm-bufio doesn't
need extra slab merging logic. Instead it can just allocate one slab
cache per client and let the allocator merge them.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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dm-bufio keeps the dm_bufio_cache_names array that holds names of the
slab caches.
Since the commit db265eca7700 ("mm/sl[aou]b: Move duping of slab name to
slab_common.c"), the kernel automatically duplicates the slab cache name
when creating the slab cache, so we no longer have to keep the name
allocated.
Remove the code that allocates the slab names and keeps them around.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Move dm-bufio.h to include/linux/ so that external GPL'd DM target
modules can use it.
It is better to allow the use of dm-bufio than force external modules
to implement the equivalent buffered IO mechanism in some new way. The
hope is this will encourage the use of dm-bufio; which will then make it
easier for a GPL'd external DM target module to be included upstream.
A couple dm-bufio EXPORT_SYMBOL exports have also been updated to use
EXPORT_SYMBOL_GPL.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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This comment was true when dm-bufio was written but, since 4.3, bios can
now have arbitrary size and the driver splits them.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Set QUEUE_FLAG_SECERASE in DM device's queue_flags if a DM table's
data devices support secure erase.
Also, add support for secure erase to both the linear and striped
targets.
Signed-off-by: Denis Semakin <d.semakin@omprussia.ru>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Otherwise, these abnormal IOs would be sent to the DM target
regardless of whether the target advertised support for them.
Factor out __process_abnormal_io() from __split_and_process_non_flush()
so that discards, write same, etc may be conditionally processed.
Fixes: 978e51ba3 ("dm: optimize bio-based NVMe IO submission")
Cc: stable@vger.kernel.org # 4.16
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Fix a race for "nosync" activations providing "aa.." device health
characters and "0/N" sync ratio rather than "AA..." and "N/N". Occurs
when status for the raid set is retrieved during resume before the MD
sync thread starts and clears the MD_RECOVERY_NEEDED flag.
Cc: stable@vger.kernel.org # 4.16+
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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process_queued_bios()
Signed-off-by: Wang Sheng-Hui <shhuiw@foxmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Ideally, we'd like to get rid of all VLAs in the kernel and add -Wvla to
the build args: https://lkml.org/lkml/2018/3/7/621
This one is a simple case, since we don't actually need the VLA at all: we
can just iterate over the stripes twice, once to emit their names, and the
second time to emit status (i.e. trade memory for time). Since the number
of stripes is probably low, this is hopefully not that expensive.
Signed-off-by: Tycho Andersen <tycho@tycho.ws>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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So developer could distinguish data and metadata bios easier.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Since crypto API commit 9fa68f62004 ("crypto: hash - prevent using keyed
hashes without setting key") dm-integrity cannot use keyed algorithms
without the key being set.
The dm-integrity recognizes this too late (during use of HMAC), so it
allows creation and formatting of superblock, but the device is in fact
unusable.
Fix it by detecting the key requirement in integrity table constructor.
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Signed-off-by: Wang Sheng-Hui <shhuiw@foxmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Reviewed-by: Scott Bauer <Scott.Bauer@intel.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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This target's kernel module being named dm-unstripe.ko doesn't allow
lvm2's DM module autoload capability to load the dm-unstripe.ko
because lvm2 looks for dm-unstriped.ko due to the target name being
"unstriped".
Add the "dm-unstriped" module alias to resolve this oversight.
NOTE: this isn't needed for the "striped" target, despite its source
file being named dm-stripe.c, because it is part of dm-mod.ko.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Address "FIXME: must support non power of 2 chunk_size, dm-stripe.c does".
Bump target version to indicate change.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Tested-by: Scott Bauer <Scott.Bauer@intel.com>
Reviewed-by: Scott Bauer <Scott.Bauer@intel.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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dm-crypt consumes an excessive amount memory when the user attempts to
zero a dm-crypt device with "blkdiscard -z". The command "blkdiscard -z"
calls the BLKZEROOUT ioctl, it goes to the function __blkdev_issue_zeroout,
__blkdev_issue_zeroout sends a large amount of write bios that contain
the zero page as their payload.
For each incoming page, dm-crypt allocates another page that holds the
encrypted data, so when processing "blkdiscard -z", dm-crypt tries to
allocate the amount of memory that is equal to the size of the device.
This can trigger OOM killer or cause system crash.
Fix this by limiting the amount of memory that dm-crypt allocates to 2%
of total system memory. This limit is system-wide and is divided by the
number of active dm-crypt devices and each device receives an equal
share.
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Could be useful for a target to return stats or other information.
If a target does DMEMIT() anything to @result from its .message method
then it must return 1 to the caller.
Signed-off-By: Mike Snitzer <snitzer@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator updates from Mark Brown:
"A very small set of updates for the regulator API this time around,
there's a few bug fixes and also:
- Conversion of the regulator API to use GPIO descriptors rather than
numbers from Linus Walleij.
- New drivers for Marvell 88PG86x and Qualcomm PM8998 and PMI8998"
* tag 'regulator-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: qcom: smd: Add pm8998 and pmi8998 regulators
regulator: core: Add missing blank line between functions
regulator: qcom_smd: Drop regulator/{machine,of_regulator} includes
regulator: giving regulator controlling gpios a non-empty label when used through the devicetree.
regulator: gpio: Fix some error handling paths in 'gpio_regulator_probe()'
regulator: 88pg86x: new i2c dual regulator chip
regulator: 88pg86x: add DT bindings document
regulator: da9211: Pass descriptors instead of GPIO numbers
regulator: da9055: Pass descriptor instead of GPIO number
regulator: core: Support passing an initialized GPIO enable descriptor
regulator: dt: regulator-name is required property
regulator: of: Add a missing 'of_node_put()' in an error handling path of 'of_regulator_match()'
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For debug, it is useful for bus providers to be able to retrieve the
'struct device' associated with an nd_region instance that it
registered. We already have to_nd_region() to perform the reverse cast
operation, in fact its duplicate declaration can be removed from the
private drivers/nvdimm/nd.h header.
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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There is a small window whereby ARS scan requests can schedule work that
userspace will miss when polling scrub_show. Hold the init_mutex lock
over calls to report the status to close this potential escape. Also,
make sure that requests to cancel the ARS workqueue are treated as an
idle event.
Cc: <stable@vger.kernel.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Fixes: 37b137ff8c83 ("nfit, libnvdimm: allow an ARS scrub...")
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown:
"This is a fairly large set of updates for regmap, mainly bugfixes.
The biggest bit of this is some fixes for the bulk operations code
which had issues in some use cases, Charles Keepax has sorted them
out. We also gained the ability to use debugfs with syscon regmaps and
to specify the clock to be used with MMIO regmaps"
* tag 'regmap-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: (21 commits)
regmap: debugfs: Improve warning message on debugfs_create_dir() failure
regmap: debugfs: Free map->debugfs_name when debugfs_create_dir() failed
regmap: debugfs: Don't leak dummy names
regmap: debugfs: Disambiguate dummy debugfs file name
regmap: mmio: Add function to attach a clock
regmap: Merge redundant handling in regmap_bulk_write
regmap: Tidy up regmap_raw_write chunking code
regmap: Move the handling for max_raw_write into regmap_raw_write
regmap: Remove unnecessary printk for failed allocation
regmap: Format data for raw write in regmap_bulk_write
regmap: use debugfs even when no device
regmap: Allow missing device in regmap_name_read_file()
regmap: Use _regmap_read in regmap_bulk_read
regmap: Tidy up regmap_raw_read chunking code
regmap: Move the handling for max_raw_read into regmap_raw_read
regmap: Use helper function for register offset
regmap: Don't use format_val in regmap_bulk_read
regmap: Correct comparison in regmap_cached
regmap: Correct offset handling in regmap_volatile_range
regmap-i2c: Off by one in regmap_i2c_smbus_i2c_read/write()
...
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amdgpu driver checks vgacon_text_force() after some initializations
but without cleaning up. This will result in leaks.
Move the check of vgacon_text_force() to the beginning of
amdgpu_init() for fixing it and also for optimization.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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The calculation of the lane widths via ATOM_PPLIB_PCIE_LINK_WIDTH_MASK and
ATOM_PPLIB_PCIE_LINK_WIDTH_SHIFT macros did not increment the resulting
value, per the comment in pptable.h ("lanes - 1"), and per usage elsewhere.
Port of the radeon fix to amdgpu.
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=102553
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Two years ago I tried an AMD Radeon E8860 embedded GPU with the drm driver.
The dmesg output included driver warnings about an invalid PCIe lane width.
Tracking the problem back led to si_set_pcie_lane_width_in_smc().
The calculation of the lane widths via ATOM_PPLIB_PCIE_LINK_WIDTH_MASK and
ATOM_PPLIB_PCIE_LINK_WIDTH_SHIFT macros did not increment the resulting
value, per the comment in pptable.h ("lanes - 1"), and per usage elsewhere.
Applying the increment silenced the warnings.
The code has not changed since, so either my analysis was incorrect or the
bug has gone unnoticed. Hence submitting this as an RFC.
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Required for dpm setup on some asics. Fixes a NULL dereference
on asics that require it.
Acked-by: Christian König <christian.koenig@amd.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=102553
Tested-by: Abel Garcia Dorta <mercuriete@yahoo.es>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Also remove code duplication in write and read regs functions.
This also fixes potential missing unlock in amdgpu_debugfs_regs_write
in case get_user would fail.
v2: Add SRBM mutex locking.
v3: Fix TO counter and fix comment location.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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This reverts commit bbaf1871ea1d7b7021e350a3e8bb1ec8408c2030.
Felix reports this commit causes regression.
Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Power value is wrong reported by customer. It is a regression by
commit a7c7bc4c0c47eaac77b8fa92f0672032df7f4254
Author: Rex Zhu <Rex.Zhu@amd.com>
Date: Mon Mar 27 15:32:59 2017 +0800
drm/amd/powerplay: reduce sample period time
for power readings.
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
The theoretical sampling period is from 50ms to 4sec, original 2sec
is long but correct, and 20ms is too short. change it to more
reasonable 200ms.
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Port the atomfirmware.h and populates the
updated pptable to SMU.With the new parameters
in the new pptable, the ACG SS feature is enabled.
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Needs to be a 32 bit mask.
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Problem: When unbind and then bind back the device KIQ hangs on Vega
after mapping KCQs request.
Fix: Adding deinitialzie code from CAIL during HW fini solves the
hang.
v2: use srbm_mutex around soc15_grbm_select()
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Remove Vega12 DIDT config functions.
Reviewed-by: Huang Rui <ray.huang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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This has a static checker warning because "frev" and "crev" can be
uninitialized if "info" is NULL. I just changed the order of the checks
so that we check "info" first.
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Sriov still wants these error messags on timeout. So, for sriov
use case, the timeout setting on compute rings is kept.
-v2: clean the code
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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