If an attention came in while handling a message response, it
could cause the state machine to go into the wrong mode and lock
things up if the state machine wasn't in normal mode. So if the
state machine is not in normal mode, save the attention flag for
later.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Tony Rex <tony.rex@ericsson.com>
Tested-by: Magnus Johansson E <magnus.e.johansson@ericsson.com>
Cc: Per Fogelström <per.fogelstrom@ericsson.com>
The BMC can be reset while we are running; that means the interrupt
and event message buffer settings may be wrong. So periodically
check to see if these values are correct, and fix them if they
are wrong.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Tony Rex <tony.rex@ericsson.com>
Tested-by: Magnus Johansson E <magnus.e.johansson@ericsson.com>
This change adds an initial IPMI driver for powerpc OPAL firmware. The
interface is exposed entirely through firmware: we have two functions to
send and receive IPMI messages, and an interrupt notification from the
firmware to signify that a message is available.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
If we ask for a mmap lenght than the max configured via the relevant
sysctl, provide a better warning, instead of just expanding the EPERM
returned:
[acme@ssdandy ~]$ trace -m 256 -e nanosleep sleep 2
Error: Operation not permitted.
Hint: Check /proc/sys/kernel/perf_event_mlock_kb (516 kB) setting.
Hint: Tried using 1028 kB.
Hint: Try using a bigger -m/--mmap-pages value.
[acme@ssdandy ~]$ trace -m 128 -e nanosleep sleep 2
2001.280 (2000.403 ms): nanosleep(rqtp: 0x7fff89a8a7f0) = 0
[acme@ssdandy ~]$
An upcoming patch will autotune the request for non-root users when -m
is not used.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-cdvxfz2gycetbkopm9sna1qp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
A message queue was added to the message handler, so the SMI
interfaces only need to handle one message at a time. Pull out
the message queue. This also leads to some significant
simplification in the shutdown of an interface, since the
message handler now does a lot of the cleanup.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The message handler expected the SMI interface to keep a queue of
messages, but that was kind of silly, the queue would be easier to
manage in the message handler itself. As part of that, fix the
message cleanup to make sure no messages are outstanding when an
SMI interface is unregistered. This makes it easier for an SMI
interface to unregister, it just has to call ipmi_unregister_smi()
first and all processing from the message handler will be cleaned
up.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The handling of BMC flags wasn't quite right in a few places, mainly
around enabling and disabling interrupts in the BMC. Clean up the
code and fix the handling of the flags.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Embed the platform device in the bmc device instead of externally
allocating it, use more proper form for creating the device
attributes, and other general cleanups.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
To pretty print hints about perf_evlist__mmap errors. Will be used in
'trace' in the next patch.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-2g3gczfwyz0xt3we0s15mqqt@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The logic around retrying and erroring IO in nvme_queue_rq() is broken
in a few ways:
- If we fail allocating dma memory for a discard, we return retry. We
have the 'iod' stored in ->special, but we free the 'iod'.
- For a normal request, if we fail dma mapping of setting up prps, we
have the same iod situation. Additionally, we haven't set the callback
for the request yet, so we also potentially leak IOMMU resources.
Get rid of the ->special 'iod' store. The retry is uncommon enough that
it's not worth optimizing for or holding on to resources to attempt to
speed it up. Additionally, it's usually best practice to free any
request related resources when doing retries.
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Will come in handy for tools, see next patches.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-nay9j62ztxpytt4ew1tkl4op@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* support for mx6sl and mx6sx
* OMAP HDMI audio rewrite to make it finally work
* OMAP video PLL work to prepare for new DRA7xx SoCs
* simplefb DT related improvements
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Merge tag 'fbdev-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux
Pull fbdev updates from Tomi Valkeinen:
- support for mx6sl and mx6sx
- OMAP HDMI audio rewrite to make it finally work
- OMAP video PLL work to prepare for new DRA7xx SoCs
- simplefb DT related improvements
* tag 'fbdev-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (81 commits)
video: uvesafb: Deletion of an unnecessary check before the function call "platform_device_put"
video: fbdev-VIA: Deletion of an unnecessary check before the function call "framebuffer_release"
video: fbdev-MMP: Deletion of an unnecessary check before the function call "mmp_unregister_path"
video: mx3fb: Deletion of an unnecessary check before the function call "backlight_device_unregister"
video: fbdev-OMAP2: Deletion of unnecessary checks before the function call "i2c_put_adapter"
video: fbdev-SIS: Deletion of unnecessary checks before the function call "pci_dev_put"
video: smscufx: Deletion of unnecessary checks before the function call "vfree"
video: udlfb: Deletion of unnecessary checks before the function call "vfree"
video: uvesafb: Deletion of an unnecessary check before the function call "uvesafb_free"
video: fbdev-LCDC: Deletion of an unnecessary check before the function call "vfree"
video: fbdev: arkfb: suppress build warning
video: fbdev: s3fb: suppress build warning
video: fbdev: vt8623fb: suppress build warning
OMAPDSS: hdmi5: Fix bit field for IEC958_AES2_CON_SOURCE
OMAPDSS: hdmi: Remove __exit qualifier from hdmi_uninit_output()
OMAPDSS: hdmi5: Change hdmi_wp idlemode to to no_idle for audio playback
OMAPDSS: Remove all references to obsolete HDMI audio callbacks
ASoC: omap: Remove obsolete HDMI audio code and Kconfig options
OMAPDSS: hdmi5: Register ASoC platform device for omap hdmi audio
OMAPDSS: hdmi5: Remove callbacks for the old ASoC DAI driver
...
This adds a lot of infrastructure for virtio 1.0 support.
Notable missing pieces: virtio pci, virtio balloon (needs spec extension),
vhost scsi.
Plus, there are some minor fixes in a couple of places.
Cc: David Miller <davem@davemloft.net>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
"virtio: virtio 1.0 support, misc patches
This adds a lot of infrastructure for virtio 1.0 support. Notable
missing pieces: virtio pci, virtio balloon (needs spec extension),
vhost scsi.
Plus, there are some minor fixes in a couple of places.
Note: some net drivers are affected by these patches. David said he's
fine with merging these patches through my tree.
Rusty's on vacation, he acked using my tree for these, too"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (70 commits)
virtio_ccw: finalize_features error handling
virtio_ccw: future-proof finalize_features
virtio_pci: rename virtio_pci -> virtio_pci_common
virtio_pci: update file descriptions and copyright
virtio_pci: split out legacy device support
virtio_pci: setup config vector indirectly
virtio_pci: setup vqs indirectly
virtio_pci: delete vqs indirectly
virtio_pci: use priv for vq notification
virtio_pci: free up vq->priv
virtio_pci: fix coding style for structs
virtio_pci: add isr field
virtio: drop legacy_only driver flag
virtio_balloon: drop legacy_only driver flag
virtio_ccw: rev 1 devices set VIRTIO_F_VERSION_1
virtio: allow finalize_features to fail
virtio_ccw: legacy: don't negotiate rev 1/features
virtio: add API to detect legacy devices
virtio_console: fix sparse warnings
vhost: remove unnecessary forward declarations in vhost.h
...
with PM_SLEEP disabled, resource release) fixes
- minor cleanups in drivers/clk/samsung/clk.c (spelling,
includes)
- modification of the exynos4 HDMI PHY clock definition to
model dependency of "sclk_hdmiphy" on the "hdmi" clock
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Merge tag 'for-v3.19-exynos-clk-2' of git://linuxtv.org/snawrocki/samsung into clk-next
- exynos4415 and exynos audio subsystem clk driver (build
with PM_SLEEP disabled, resource release) fixes
- minor cleanups in drivers/clk/samsung/clk.c (spelling,
includes)
- modification of the exynos4 HDMI PHY clock definition to
model dependency of "sclk_hdmiphy" on the "hdmi" clock
Fixes the following sparse warnings:
drivers/clk/mmp/clk-frac.c:113:6: warning:
symbol 'clk_factor_init' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Pull mailbox framework updates from Jassi Brar.
* 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
Mailbox: Add support for Platform Communication Channel
mailbox/omap: adapt to the new mailbox framework
mailbox: add tx_prepare client callback
mailbox: Don't unnecessarily re-arm the polling timer
Not a huge amount going on this release, mainly new drivers (there's a
couple more waiting that didn't quite make the cut for this release
too):
- An interface for querying if the current transfer is the last in a
message, allowing controllers that need special handling for the
final transfer to use the core message parsing.
- Support for Amlogic Meson SPIFC, Imagination Technologies SFPI, Intel
Quark X1000 and Samsung Exynos 7 controllers.
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Merge tag 'spi-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
"Not a huge amount going on this release, mainly new drivers (there's a
couple more waiting that didn't quite make the cut for this release
too):
- An interface for querying if the current transfer is the last in a
message, allowing controllers that need special handling for the
final transfer to use the core message parsing.
- Support for Amlogic Meson SPIFC, Imagination Technologies SFPI,
Intel Quark X1000 and Samsung Exynos 7 controllers"
* tag 'spi-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (38 commits)
spi/s3c64xx: Remove redundant runtime PM management
spi: fsl-spi: remove unused variable assignment
spi: spi-fsl-spi: Return an error code in fsl_spi_do_one_msg()
spi: core: Do not mangle error code from kthread_run()
spi: fsl-espi: add (un)prepare_transfer_hardware calls to save power if SPI is not in use
spi: fsl-(e)spi: migrate to generic master queueing
spi/txx9: Deletion of an unnecessary check before the function call "clk_disable"
spi: cadence: Fix 3-to-8 mux mode
spi: cadence: Init HW after reading devicetree attributes
spi: meson: Select REGMAP_MMIO
spi: s3c64xx: add support for exynos7 SPI controller
spi: spi-pxa2xx: SPI support for Intel Quark X1000
spi: meson: meson_spifc_setup_speed() can be static
spi: spi-pxa2xx: Add helpers for regiseters' accessing
spi: spi-mxs: Fix mapping from vmalloc-ed buffer to scatter list
spi: atmel: introduce probe deferring
spi: atmel: remove compat for non DT board when requesting dma chan
spi: meson: Add support for Amlogic Meson SPIFC
spi: meson: Add device tree bindings documentation for SPIFC
spi: core: Add spi_transfer_is_last() helper
...
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Merge tag 'edac/v3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac
Pull edac updates from Mauro Carvalho Chehab:
- Broadwell-DE support on sb-edac driver
- Some fixes at sb-edac driver
* tag 'edac/v3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac:
sb_edac: Fix typo computing number of banks
sb_edac: Add support for Broadwell-DE processor
sb_edac: Fix discovery of top-of-low-memory for Haswell
sb_edac: Fix erroneous bytes->gigabytes conversion
sb_edac: Fix off-by-one error in number of channels
This patch moves the mgmt_powered() notification earlier in the
hci_dev_do_close() function. This way the correct "not powered" error
gets passed to any pending mgmt commands. Without the patch the pending
commands would instead get a misleading "disconnected" response when
powering down the adapter.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The pairing_complete() function is used as a pending mgmt command
cmd_complete callback. The expectation of such functions is that they
are not responsible themselves for calling mgmt_pending_remove(). This
patch fixes the incorrect mgmt_pending_remove() call in
pairing_complete() and adds it to the appropriate changes.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The pairing_complete() function relies on a hci_conn reference to be
able to access the hci_conn object. It should therefore only release
this reference once it's done accessing the object, i.e. at the end of
the function.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Currently, when trying to reuse a socket, vxlan_sock_add will grab
vn->sock_lock, locate a reusable socket, inc refcount and release
vn->sock_lock.
But vxlan_sock_release() will first decrement refcount, and then grab
that lock. refcnt operations are atomic but as currently we have
deferred works which hold vs->refcnt each, this might happen, leading to
a use after free (specially after vxlan_igmp_leave):
CPU 1 CPU 2
deferred work vxlan_sock_add
... ...
spin_lock(&vn->sock_lock)
vs = vxlan_find_sock();
vxlan_sock_release
dec vs->refcnt, reaches 0
spin_lock(&vn->sock_lock)
vxlan_sock_hold(vs), refcnt=1
spin_unlock(&vn->sock_lock)
hlist_del_rcu(&vs->hlist);
vxlan_notify_del_rx_port(vs)
spin_unlock(&vn->sock_lock)
So when we look for a reusable socket, we check if it wasn't freed
already before reusing it.
Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Fixes: 7c47cedf43 ("vxlan: move IGMP join/leave to work queue")
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'media/v3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- Two new dvb frontend drivers: mn88472 and mn88473
- A new driver for some PCIe DVBSky cards
- A new remote controller driver: meson-ir
- One LIRC staging driver got rewritten and promoted to mainstream:
igorplugusb
- A new tuner driver (m88rs6000t)
- The old omap2 media driver got removed from staging. This driver
uses an old DMA API and it is likely broken on recent kernels.
Nobody cared enough to fix it
- Media bus format moved to a separate header, as DRM will also use the
definitions there
- mem2mem_testdev were renamed to vim2m, in order to use the same
naming convention taken by the other virtual test driver (vivid)
- Added a new driver for coda SoC (coda-jpeg)
- The cx88 driver got converted to use videobuf2 core
- Make DMABUF export buffer to work with DMA Scatter/Gather and Vmalloc
cores
- Lots of other fixes, improvements and cleanups on the drivers.
* tag 'media/v3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (384 commits)
[media] mn88473: One function call less in mn88473_init() after error
[media] mn88473: Remove uneeded check before release_firmware()
[media] lirc_zilog: Deletion of unnecessary checks before vfree()
[media] MAINTAINERS: Add myself as img-ir maintainer
[media] img-ir: Don't set driver's module owner
[media] img-ir: Depend on METAG or MIPS or COMPILE_TEST
[media] img-ir/hw: Drop [un]register_decoder declarations
[media] img-ir/hw: Fix potential deadlock stopping timer
[media] img-ir/hw: Always read data to clear buffer
[media] redrat3: ensure dma is setup properly
[media] ddbridge: remove unneeded check before dvb_unregister_device()
[media] si2157: One function call less in si2157_init() after error
[media] tuners: remove uneeded checks before release_firmware()
[media] arm: omap2: rx51-peripherals: fix build warning
[media] stv090x: add an extra protetion against buffer overflow
[media] stv090x: Remove an unreachable code
[media] stv090x: Some whitespace cleanups
[media] em28xx: checkpatch cleanup: whitespaces/new lines cleanups
[media] si2168: add support for firmware files in new format
[media] si2168: debug printout for firmware version
...
Or Gerlitz says:
====================
mlx4 driver update
This series from Matan, Jenny, Dotan and myself is mostly about adding
support to a new performance optimized flow steering mode (patches 4-10).
The 1st two patches are small fixes (one for VXLAN and one for SRIOV),
and the third patch is a fix to avoid hard-lockup situation when many
(hunderds) processes holding user-space QPs/CQs get events.
Matan and Or.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add the required firmware commands for A0 steering and a way to enable
that. The firmware support focuses on INIT_HCA, QUERY_HCA, QUERY_PORT,
QUERY_DEV_CAP and QUERY_FUNC_CAP commands. Those commands are used
to configure and query the device.
The different A0 DMFS (steering) modes are:
Static - optimized performance, but flow steering rules are
limited. This mode should be choosed explicitly by the user
in order to be used.
Dynamic - this mode should be explicitly choosed by the user.
In this mode, the FW works in optimized steering mode as long as
it can and afterwards automatically drops to classic (full) DMFS.
Disable - this mode should be explicitly choosed by the user.
The user instructs the system not to use optimized steering, even if
the FW supports Dynamic A0 DMFS (and thus will be able to use optimized
steering in Default A0 DMFS mode).
Default - this mode is implicitly choosed. In this mode, if the FW
supports Dynamic A0 DMFS, it'll work in this mode. Otherwise, it'll
work at Disable A0 DMFS mode.
Under SRIOV configuration, when the A0 steering mode is enabled,
older guest VF drivers who aren't using the RX QP allocation flag
(MLX4_RESERVE_A0_QP) will get a QP from the general range and
fail when attempting to register a steering rule. To avoid that,
the PF context behaviour is changed once on A0 static mode, to
require support for the allocation flag in VF drivers too.
In order to enable A0 steering, we use log_num_mgm_entry_size param.
If the value of the parameter is not positive, we treat the absolute
value of log_num_mgm_entry_size as a bit field. Setting bit 2 of this
bit field enables static A0 steering.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently QUERY_PORT is done as a part of QUERY_DEV_CAP firmware command.
Since we would like to use it without querying all device capabilities,
extract this part to be a function of its own.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When a given flow steering rule is invalid in respect to the current
steering configuration, print the correct error message to the system log.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A0 hybrid steering is a form of high performance flow steering.
By using this mode, mlx4 cards use a fast limited table based steering,
in order to enable fast steering of unicast packets to a QP.
In order to implement A0 hybrid steering we allocate resources
from different zones:
(1) General range
(2) Special MAC-assigned QPs [RSS, Raw-Ethernet] each has its own region.
When we create a rss QP or a raw ethernet (A0 steerable and BF ready) QP,
we try hard to allocate the QP from range (2). Otherwise, we try hard not
to allocate from this range. However, when the system is pushed to its
limits and one needs every resource, the allocator uses every region it can.
Meaning, when we run out of raw-eth qps, the allocator allocates from the
general range (and the special-A0 area is no longer active). If we run out
of RSS qps, the mechanism tries to allocate from the raw-eth QP zone. If that
is also exhausted, the allocator will allocate from the general range
(and the A0 region is no longer active).
Note that if a raw-eth qp is allocated from the general range, it attempts
to allocate the range such that bits 6 and 7 (blueflame bits) in the
QP number are not set.
When the feature is used in SRIOV, the VF has to notify the PF what
kind of QP attributes it needs. In order to do that, along with the
"Eth QP blueflame" bit, we reserve a new "A0 steerable QP". According
to the combination of these bits, the PF tries to allocate a suitable QP.
In order to maintain backward compatibility (with older PFs), the PF
notifies which QP attributes it supports via QUERY_FUNC_CAP command.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The zone allocator is a mechanism which manages a few mlx4_bitmaps.
When allocating a resource, the user indicates the desired zone of
which this resource will be allocated from. If possible, the resource
will be allocated from this zone. Otherwise, the resource will be
allocated from a less-than, equal-to, higher-than priority zone,
according to the desired zone's properties with that respective
allocation order.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The number of reserved QPs is affected both from the firmware and
from the driver's requirements. This patch adds a check that
validates that this number is indeed feasable.
Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When using BF (Blue-Flame), the QPN overrides the VLAN, CV, and SV fields
in the WQE. Thus, BF may only be used for QPNs with bits 6,7 unset.
The current Ethernet driver code reserves a Tx QP range with 256b alignment.
This is wrong because if there are more than 64 Tx QPs in use,
QPNs >= base + 65 will have bits 6/7 set.
This problem is not specific for the Ethernet driver, any entity that
tries to reserve more than 64 BF-enabled QPs should fail. Also, using
ranges is not necessary here and is wasteful.
The new mechanism introduced here will support reservation for
"Eth QPs eligible for BF" for all drivers: bare-metal, multi-PF, and VFs
(when hypervisors support WC in VMs). The flow we use is:
1. In mlx4_en, allocate Tx QPs one by one instead of a range allocation,
and request "BF enabled QPs" if BF is supported for the function
2. In the ALLOC_RES FW command, change param1 to:
a. param1[23:0] - number of QPs
b. param1[31-24] - flags controlling QPs reservation
Bit 31 refers to Eth blueflame supported QPs. Those QPs must have
bits 6 and 7 unset in order to be used in Ethernet.
Bits 24-30 of the flags are currently reserved.
When a function tries to allocate a QP, it states the required attributes
for this QP. Those attributes are considered "best-effort". If an attribute,
such as Ethernet BF enabled QP, is a must-have attribute, the function has
to check that attribute is supported before trying to do the allocation.
In a lower layer of the code, mlx4_qp_reserve_range masks out the bits
which are unsupported. If SRIOV is used, the PF validates those attributes
and masks out unsupported attributes as well. In order to notify VFs which
attributes are supported, the VF uses QUERY_FUNC_CAP command. This command's
mailbox is filled by the PF, which notifies which QP allocation attributes
it supports.
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.co.il>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Previously, we've fired all our completion callbacks straight from our ISR.
Some of those callbacks were lightweight (for example, mlx4_en's and
IPoIB napi callbacks), but some of them did more work (for example,
the user-space RDMA stack uverbs' completion handler). Besides that,
doing more than the minimal work in ISR is generally considered wrong,
it could even lead to a hard lockup of the system. Since when a lot
of completion events are generated by the hardware, the loop over those
events could be so long, that we'll get into a hard lockup by the system
watchdog.
In order to avoid that, add a new way of invoking completion events
callbacks. In the interrupt itself, we add the CQs which receive completion
event to a per-EQ list and schedule a tasklet. In the tasklet context
we loop over all the CQs in the list and invoke the user callback.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When VFs (guests in this context) issue the QUERY_DEV_CAP command, they
need not be told that host side virtualization features such as VST, FSM
(MAC anti-spoofing) and running > 80 VFs are supported by the device.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This was dropped by mistake for the napi_gro_frags flow, fix that.
Fixes: dd65beac48 ('net/mlx4_en: Extend usage of napi_gro_frags')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The Read Page Scan Activity and Read Page Scan Type commands are not
supported by all controllers. Move the execution of both commands
into the 3rd phase of the init procedure. And then check the bit
mask of supported commands before adding them to the init sequence.
With this re-ordering of the init sequence, the extra check for
AVM BlueFritz! controllers is no longer needed. They will report
that these two commands are not supported.
This fixes an issue with the Microsoft Corp. Wireless Transceiver
for Bluetooth 2.0 (ID 045e:009c).
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
- Simplify Device Tree initialisation; lp855x_bl
- Add Regulator support; lp855x
- Remove Bryan from the Maintainer list -- new baby, no time :)
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Merge tag 'backlight-for-linus-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight
Pull backlight updates from Lee Jones:
- Clean-up leaky resources; pwm_bl
- Simplify Device Tree initialisation; lp855x_bl
- Add Regulator support; lp855x
- Remove Bryan from the Maintainer list -- new baby, no time :)
* tag 'backlight-for-linus-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
MAINTAINERS: Remove my name from Backlight subsystem
backlight: lp855x: Add supply regulator to lp855x
backlight: lp855x: Refactor DT parsing code
backlight: pwm: Clean-up pwm requested using legacy API
