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* Merge tag 'rproc-v4.16' of git://github.com/andersson/remoteprocLinus Torvalds2018-02-0510-199/+91
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull remoteproc updates from Bjorn Andersson: "This contains a few bug fixes and a cleanup up of the resource-table handling in the framework, which removes the need for drivers with no resource table to provide a fake one" * tag 'rproc-v4.16' of git://github.com/andersson/remoteproc: remoteproc: Reset table_ptr on stop remoteproc: Drop dangling find_rsc_table dummies remoteproc: Move resource table load logic to find remoteproc: Don't handle empty resource table remoteproc: Merge rproc_ops and rproc_fw_ops remoteproc: Clone rproc_ops in rproc_alloc() remoteproc: Cache resource table size remoteproc: Remove depricated crash completion virtio_remoteproc: correct put_device virtio_device.dev
| * remoteproc: Reset table_ptr on stopBjorn Andersson2018-01-151-0/+3
| | | | | | | | | | | | | | | | | | The installed resource table is no longer accessible after stopping the remote, so update table_ptr to point to the local copy. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * remoteproc: Drop dangling find_rsc_table dummiesBjorn Andersson2018-01-156-54/+0
| | | | | | | | | | | | | | | | | | As the core now deals with the lack of a resource table, remove the dangling custom dummy implementations of find_rsc_table from drivers. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * remoteproc: Move resource table load logic to findBjorn Andersson2018-01-153-50/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extend the previous operation of finding the resource table in the ELF with the extra step of populating the rproc struct with a copy and the size. This allows drivers to override the mechanism used for acquiring the resource table, or omit it for firmware that is known not to have a resource table. This leaves the custom, dummy, find_rsc_table implementations found in some drivers dangling. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * remoteproc: Don't handle empty resource tableBjorn Andersson2018-01-151-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | Allow a NULL table_ptr to have the same meaning as a table with 0 entries, allowing a subsequent patch to skip the assignment step. A few other places in the implementation does dereference table_ptr, but they are currently all coming from rproc_handle_resources(). Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * remoteproc: Merge rproc_ops and rproc_fw_opsBjorn Andersson2018-01-157-88/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | There are currently a few different schemes used for overriding fw_ops or parts of fw_ops. Merge fw_ops into rproc_ops and expose the default ELF-loader symbols so that they can be assigned by the drivers. To keep backwards compatibility with the "default" case, a driver not specifying the "load" operation is assumed to want the full ELF-loader suit of functions. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * remoteproc: Clone rproc_ops in rproc_alloc()Bjorn Andersson2018-01-151-1/+8
| | | | | | | | | | | | | | | | | | In order to allow rproc_alloc() to, in a future patch, update entries in the "ops" struct we need to make a local copy of it. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * remoteproc: Cache resource table sizeBjorn Andersson2018-01-151-13/+7
| | | | | | | | | | | | | | | | | | | | | | We don't re-read the resource table during a recovery, so it is possible in the recovery path that the resource table has a different size than cached_table. Store the original size of cached_table to avoid these getting out of sync. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * remoteproc: Remove depricated crash completionBjorn Andersson2018-01-151-10/+0
| | | | | | | | | | | | | | | | | | The crash handling now happens in a single execution context, so there's no longer a need for a completion to synchronize this. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * virtio_remoteproc: correct put_device virtio_device.devweiping zhang2018-01-021-1/+1
| | | | | | | | | | | | | | | | | | | | rproc_virtio_dev_release will be called iff virtio_device.dev's reference count drops to 0. Here we just put vdev.dev, and then rproc->dev's cleanup will be done in rproc_virtio_dev_release. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: weiping zhang <zhangweiping@didichuxing.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* | Merge tag 'rpmsg-v4.16' of git://github.com/andersson/remoteprocLinus Torvalds2018-02-054-19/+55
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull rpmsg updates from Bjorn Andersson: "This fixes a few issues found in the SMD and GLINK drivers and corrects the handling of SMD channels that are found in an (previously) unexpected state" * tag 'rpmsg-v4.16' of git://github.com/andersson/remoteproc: rpmsg: smd: Fix double unlock in __qcom_smd_send() rpmsg: glink: Fix missing mutex_init() in qcom_glink_alloc_channel() rpmsg: smd: Don't hold the tx lock during wait rpmsg: smd: Fail send on a closed channel rpmsg: smd: Wake up all waiters rpmsg: smd: Create device for all channels rpmsg: smd: Perform handshake during open rpmsg: glink: smem: Ensure ordering during tx drivers: rpmsg: remove duplicate includes remoteproc: qcom: Use PTR_ERR_OR_ZERO() in glink prob
| * | rpmsg: smd: Fix double unlock in __qcom_smd_send()Dan Carpenter2018-01-191-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | We're not holding the lock here, so we shouldn't unlock. Fixes: 178f3f75bb4e ("rpmsg: smd: Don't hold the tx lock during wait") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> [bjorn: renamed "out" label to further distinguish the two exit paths] Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | rpmsg: glink: Fix missing mutex_init() in qcom_glink_alloc_channel()Wei Yongjun2018-01-021-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | qcom_glink_alloc_channel() allocates the mutex but not initialize it. Use mutex_init() on it to initialize it correctly. This is detected by Coccinelle semantic patch. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | rpmsg: smd: Don't hold the tx lock during waitBjorn Andersson2017-12-191-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Holding the tx lock while waiting for tx-drain events from the remote side blocks try_send requests from failing quickly, so temporarily drop the tx lock while waiting. While this allows try_send to fail quickly it also could allow a subsequent send to succeed putting a smaller packet in the FIFO while we're waiting for room for our large packet. But as this lock is per channel we expect that clients with ordering concerns implements their own ordering mechanism. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | rpmsg: smd: Fail send on a closed channelBjorn Andersson2017-12-191-6/+8
| | | | | | | | | | | | | | | | | | | | | Move the check for a closed channel out from the tx-full loop to fail any send request on a non-open channel. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | rpmsg: smd: Wake up all waitersBjorn Andersson2017-12-191-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | It's possible to have multiple contexts waiting for new channel events and with an upcoming change it's possible to have multiple contexts waiting for a full FIFO. As such we need to wake them all up. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | rpmsg: smd: Create device for all channelsBjorn Andersson2017-12-191-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than selectively creating devices only for the channels that the remote have moved to "opening" state let's create devices for all channels found. The driver model will match drivers to the ones we care about and attempt to open these. The one case where this fails is if the user loads a firmware that lacks a particular channel of the previous firmware that was running, in which case we would find the old channel and attempt to probe it. The channel opening handshake will ensure this will result in a graceful failure. The result of this patch is that we will actively open the RPM channel even though it's left in a state other than "opening" after the boot loader's closing of the channel. Tested-by: Will Newton <will.newton@gmail.com> Reported-by: Jeremy McNicoll <jmcnicol@redhat.com> Reported-by: Will Newton <will.newton@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | rpmsg: smd: Perform handshake during openBjorn Andersson2017-12-191-0/+30
| | | | | | | | | | | | | | | | | | | | | | | | Validate the the remote side is opening the channel that we've found by performing a handshake when opening the channel. Tested-by: Will Newton <will.newton@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | rpmsg: glink: smem: Ensure ordering during txBjorn Andersson2017-12-191-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure the ordering of the fifo write and the update of the write index, so that the index is not updated before the data has landed in the fifo. Acked-By: Chris Lew <clew@codeaurora.org> Reported-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | drivers: rpmsg: remove duplicate includesPravin Shedge2017-12-061-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | These duplicate includes have been found with scripts/checkincludes.pl but they have been removed manually to avoid removing false positives. Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * | remoteproc: qcom: Use PTR_ERR_OR_ZERO() in glink probVasyl Gomonovych2017-11-291-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | Fix ptr_ret.cocci warnings: drivers/remoteproc/qcom_common.c:60:8-14: WARNING: PTR_ERR_OR_ZERO can be used Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR Generated by: scripts/coccinelle/api/ptr_ret.cocci Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* | Merge tag 'mmc-v4.16-2' of ↵Linus Torvalds2018-02-053-10/+161
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc Pull MMC host fixes from Ulf Hansson: - renesas_sdhi: Fix build error in case NO_DMA=y - sdhci: Implement a bounce buffer to address throughput regressions * tag 'mmc-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: MMC_SDHI_{SYS,INTERNAL}_DMAC should depend on HAS_DMA mmc: sdhci: Implement an SDHCI-specific bounce buffer
| * | mmc: MMC_SDHI_{SYS,INTERNAL}_DMAC should depend on HAS_DMAGeert Uytterhoeven2018-01-311-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If NO_DMA=y: ERROR: "bad_dma_ops" [drivers/mmc/host/renesas_sdhi_sys_dmac.ko] undefined! ERROR: "bad_dma_ops" [drivers/mmc/host/renesas_sdhi_internal_dmac.ko] undefined! Add dependencies on HAS_DMA to fix this. Fixes: e578afab6e5f57e7 ("mmc: renesas_sdhi: remove wrong depends on to enable compile test") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| * | mmc: sdhci: Implement an SDHCI-specific bounce bufferLinus Walleij2018-01-312-8/+159
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bounce buffer is gone from the MMC core, and now we found out that there are some (crippled) i.MX boards out there that have broken ADMA (cannot do scatter-gather), and also broken PIO so they must use SDMA. Closer examination shows a less significant slowdown also on SDMA-only capable Laptop hosts. SDMA sets down the number of segments to one, so that each segment gets turned into a singular request that ping-pongs to the block layer before the next request/segment is issued. Apparently it happens a lot that the block layer send requests that include a lot of physically discontiguous segments. My guess is that this phenomenon is coming from the file system. These devices that cannot handle scatterlists in hardware can see major benefits from a DMA-contiguous bounce buffer. This patch accumulates those fragmented scatterlists in a physically contiguous bounce buffer so that we can issue bigger DMA data chunks to/from the card. When tested with a PCI-integrated host (1217:8221) that only supports SDMA: 0b:00.0 SD Host controller: O2 Micro, Inc. OZ600FJ0/OZ900FJ0/OZ600FJS SD/MMC Card Reader Controller (rev 05) This patch gave ~1Mbyte/s improved throughput on large reads and writes when testing using iozone than without the patch. dmesg: sdhci-pci 0000:0b:00.0: SDHCI controller found [1217:8221] (rev 5) mmc0 bounce up to 128 segments into one, max segment size 65536 bytes mmc0: SDHCI controller on PCI [0000:0b:00.0] using DMA On the i.MX SDHCI controllers on the crippled i.MX 25 and i.MX 35 the patch restores the performance to what it was before we removed the bounce buffers. Cc: Pierre Ossman <pierre@ossman.eu> Cc: Benoît Thébaudeau <benoit@wsystem.com> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Benjamin Beckmeyer <beckmeyer.b@rittal.de> Cc: stable@vger.kernel.org # v4.14+ Fixes: de3ee99b097d ("mmc: Delete bounce buffer handling") Tested-by: Benjamin Beckmeyer <beckmeyer.b@rittal.de> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
* | | Merge tag 'pwm/for-4.16-rc1' of ↵Linus Torvalds2018-02-053-1/+28
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm updates from Thierry Reding: "The Meson PWM controller driver gains support for the AXG series and a minor bug is fixed for the STMPE driver. To round things off, the class is now set for PWM channels exported via sysfs which allows non-root access, provided that the system has been configured accordingly" * tag 'pwm/for-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: pwm: meson: Add clock source configuration for Meson-AXG dt-bindings: pwm: Update bindings for the Meson-AXG pwm: stmpe: Fix wrong register offset for hwpwm=2 case pwm: Set class for exported channels in sysfs
| * | | pwm: meson: Add clock source configuration for Meson-AXGJian Hu2017-12-051-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For PWM controller in the Meson-AXG SoC, the EE domain and AO domain have different clock sources. This patch tries to describe them in the DT compatible data. Signed-off-by: Jian Hu <jian.hu@amlogic.com> Signed-off-by: Yixun Lan <yixun.lan@amlogic.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * | | pwm: stmpe: Fix wrong register offset for hwpwm=2 caseAxel Lin2017-12-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix trivial copy/paste bug. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Fixes: ef1f09eca74a ("pwm: Add a driver for the STMPE PWM") Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * | | pwm: Set class for exported channels in sysfsGottfried Haider2017-12-051-0/+1
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Notifications for devices without bus or class set get dropped by dev_uevent_filter(). Adding the class to the exported child matches what the GPIO subsystem is doing. With this change exporting a channel triggers a udev event, which gives userspace a chance to fixup permissions and makes it possible for non-root users to make use of the PWM subsystem. Signed-off-by: Gottfried Haider <gottfried.haider@gmail.com> CC: Thierry Reding <thierry.reding@gmail.com> CC: H Hartley Sweeten <hsweeten@visionengravers.com> CC: linux-pwm@vger.kernel.org CC: linux-arm-kernel@lists.infradead.org CC: linux-rpi-kernel@lists.infradead.org Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
* | | net: mediatek: Explicitly include pinctrl headersThierry Reding2018-02-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Mediatek ethernet driver fails to build after commit 23c35f48f5fb ("pinctrl: remove include file from <linux/device.h>") because it relies on the pinctrl/consumer.h and pinctrl/devinfo.h being pulled in by the device.h header implicitly. Include these headers explicitly to avoid the build failure. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | mmc: meson-gx-mmc: Explicitly include pinctr/consumer.hThierry Reding2018-02-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Meson GX MMC driver fails to build after commit 23c35f48f5fb ("pinctrl: remove include file from <linux/device.h>") because it relies on the pinctrl/consumer.h being pulled in by the device.h header implicitly. Include the header explicitly to avoid the build failure. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | drm/rockchip: lvds: Explicitly include pinctrl headersThierry Reding2018-02-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Rockchip LVDS driver fails to build after commit 23c35f48f5fb ("pinctrl: remove include file from <linux/device.h>") because it relies on the pinctrl/consumer.h and pinctrl/devinfo.h being pulled in by the device.h header implicitly. Include these headers explicitly to avoid the build failure. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | pinctrl: files should directly include apis they useStephen Rothwell2018-02-051-0/+1
| | | | | | | | | | | | | | | | | | Fixes: 23c35f48f5fb ("pinctrl: remove include file from <linux/device.h>") Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds2018-02-041-1/+2
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Thomas Gleixner: "Two small changes: - a fix for a interrupt regression caused by the vector management changes in 4.15 affecting museum pieces which rely on interrupt probing for legacy (e.g. parallel port) devices. One of the startup calls in the autoprobe code was not changed to the new activate_and_startup() function resulting in a warning and as a consequence failing to discover the device interrupt. - a trivial update to the copyright/license header of the STM32 irq chip driver" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Make legacy autoprobing work again irqchip/stm32: Fix copyright
| * | | irqchip/stm32: Fix copyrightBenjamin Gaignard2018-01-291-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Uniformize STMicroelectronics copyrights header and add SPDX identifier CC: Maxime Coquelin <mcoquelin.stm32@gmail.com> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> Acked-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: jason@lakedaemon.net Cc: marc.zyngier@arm.com Cc: linux-arm-kernel@lists.infradead.org Link: https://lkml.kernel.org/r/20171130084500.23439-1-benjamin.gaignard@st.com
* | | | Merge tag 'for-linus-20180204' of git://git.kernel.dk/linux-blockLinus Torvalds2018-02-047-22/+14
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull more block updates from Jens Axboe: "Most of this is fixes and not new code/features: - skd fix from Arnd, fixing a build error dependent on sla allocator type. - blk-mq scheduler discard merging fixes, one from me and one from Keith. This fixes a segment miscalculation for blk-mq-sched, where we mistakenly think two segments are physically contigious even though the request isn't carrying real data. Also fixes a bio-to-rq merge case. - Don't re-set a bit on the buffer_head flags, if it's already set. This can cause scalability concerns on bigger machines and workloads. From Kemi Wang. - Add BLK_STS_DEV_RESOURCE return value to blk-mq, allowing us to distuingish between a local (device related) resource starvation and a global one. The latter might happen without IO being in flight, so it has to be handled a bit differently. From Ming" * tag 'for-linus-20180204' of git://git.kernel.dk/linux-block: block: skd: fix incorrect linux/slab_def.h inclusion buffer: Avoid setting buffer bits that are already set blk-mq-sched: Enable merging discard bio into request blk-mq: fix discard merge with scheduler attached blk-mq: introduce BLK_STS_DEV_RESOURCE
| * | | | block: skd: fix incorrect linux/slab_def.h inclusionArnd Bergmann2018-02-021-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | skd includes slab_def.h to get access to the slab cache object size. However, including this header breaks when we use SLUB or SLOB instead of the SLAB allocator, since the structure layout is completely different, as shown by this warning when we build this driver in one of the invalid configurations with link-time optimizations enabled: include/linux/slab.h:715:0: error: type of 'kmem_cache_size' does not match original declaration [-Werror=lto-type-mismatch] unsigned int kmem_cache_size(struct kmem_cache *s); mm/slab_common.c:77:14: note: 'kmem_cache_size' was previously declared here unsigned int kmem_cache_size(struct kmem_cache *s) ^ mm/slab_common.c:77:14: note: code may be misoptimized unless -fno-strict-aliasing is used include/linux/slab.h:147:0: error: type of 'kmem_cache_destroy' does not match original declaration [-Werror=lto-type-mismatch] void kmem_cache_destroy(struct kmem_cache *); mm/slab_common.c:858:6: note: 'kmem_cache_destroy' was previously declared here void kmem_cache_destroy(struct kmem_cache *s) ^ mm/slab_common.c:858:6: note: code may be misoptimized unless -fno-strict-aliasing is used include/linux/slab.h:140:0: error: type of 'kmem_cache_create' does not match original declaration [-Werror=lto-type-mismatch] struct kmem_cache *kmem_cache_create(const char *name, size_t size, mm/slab_common.c:534:1: note: 'kmem_cache_create' was previously declared here kmem_cache_create(const char *name, size_t size, size_t align, ^ This removes the header inclusion and instead uses the kmem_cache_size() interface to get the size in a reliable way. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
| * | | | blk-mq: introduce BLK_STS_DEV_RESOURCEMing Lei2018-01-316-19/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This status is returned from driver to block layer if device related resource is unavailable, but driver can guarantee that IO dispatch will be triggered in future when the resource is available. Convert some drivers to return BLK_STS_DEV_RESOURCE. Also, if driver returns BLK_STS_RESOURCE and SCHED_RESTART is set, rerun queue after a delay (BLK_MQ_DELAY_QUEUE) to avoid IO stalls. BLK_MQ_DELAY_QUEUE is 3 ms because both scsi-mq and nvmefc are using that magic value. If a driver can make sure there is in-flight IO, it is safe to return BLK_STS_DEV_RESOURCE because: 1) If all in-flight IOs complete before examining SCHED_RESTART in blk_mq_dispatch_rq_list(), SCHED_RESTART must be cleared, so queue is run immediately in this case by blk_mq_dispatch_rq_list(); 2) if there is any in-flight IO after/when examining SCHED_RESTART in blk_mq_dispatch_rq_list(): - if SCHED_RESTART isn't set, queue is run immediately as handled in 1) - otherwise, this request will be dispatched after any in-flight IO is completed via blk_mq_sched_restart() 3) if SCHED_RESTART is set concurently in context because of BLK_STS_RESOURCE, blk_mq_delay_run_hw_queue() will cover the above two cases and make sure IO hang can be avoided. One invariant is that queue will be rerun if SCHED_RESTART is set. Suggested-by: Jens Axboe <axboe@kernel.dk> Tested-by: Laurence Oberman <loberman@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | | | | Merge tag 'ntb-4.16' of git://github.com/jonmason/ntbLinus Torvalds2018-02-0410-1852/+3269
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NTB updates from Jon Mason: "Bug fixes galore, removal of the ntb atom driver, and updates to the ntb tools and tests to support the multi-port interface" * tag 'ntb-4.16' of git://github.com/jonmason/ntb: (37 commits) NTB: ntb_perf: fix cast to restricted __le32 ntb_perf: Fix an error code in perf_copy_chunk() ntb_hw_switchtec: Make function switchtec_ntb_remove() static NTB: ntb_tool: fix memory leak on 'buf' on error exit path NTB: ntb_perf: fix printing of resource_size_t NTB: ntb_hw_idt: Set NTB_TOPO_SWITCH topology NTB: ntb_test: Update ntb_perf tests NTB: ntb_test: Update ntb_tool MW tests NTB: ntb_test: Add ntb_tool Message tests NTB: ntb_test: Update ntb_tool Scratchpad tests NTB: ntb_test: Update ntb_tool DB tests NTB: ntb_test: Update ntb_tool link tests NTB: ntb_test: Add ntb_tool port tests NTB: ntb_test: Safely use paths with whitespace NTB: ntb_perf: Add full multi-port NTB API support NTB: ntb_tool: Add full multi-port NTB API support NTB: ntb_pp: Add full multi-port NTB API support NTB: Fix UB/bug in ntb_mw_get_align() NTB: Set dma mask and dma coherent mask to NTB devices NTB: Rename NTB messaging API methods ...
| * | | | | NTB: ntb_perf: fix cast to restricted __le32Serge Semin2018-01-291-15/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sparse is whining about the u32 and __le32 mixed usage in the driver drivers/ntb/test/ntb_perf.c:288:21: warning: cast to restricted __le32 drivers/ntb/test/ntb_perf.c:295:37: warning: incorrect type in argument 4 (different base types) drivers/ntb/test/ntb_perf.c:295:37: expected unsigned int [unsigned] [usertype] val drivers/ntb/test/ntb_perf.c:295:37: got restricted __le32 [usertype] <noident> ... NTB hardware drivers shall accept CPU-endian data and translate it to the portable formate by internal means, so the explicit conversions are not necessary before Scratchpad/Messages API usage anymore. Fixes: b83003b3fdc1 ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | ntb_perf: Fix an error code in perf_copy_chunk()Dan Carpenter2018-01-291-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We accidentally return success if dmaengine_submit() fails. The fix is to preserve the error code from dma_submit_error(). Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | ntb_hw_switchtec: Make function switchtec_ntb_remove() staticWei Yongjun2018-01-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes the following sparse warnings: drivers/ntb/hw/mscc/ntb_hw_switchtec.c:1552:6: warning: symbol 'switchtec_ntb_remove' was not declared. Should it be static? Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: ntb_tool: fix memory leak on 'buf' on error exit pathColin Ian King2018-01-291-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently there is a memory leak on buf when the call to ntb_mw_get_align fails. Add an exit err label and jump to this so that kfree on buf frees the memory. Detected by CoverityScan, CID#1464286 ("Resource leak") Fixes: d637628ce00c ("NTB: ntb_tool: Add full multi-port NTB API support") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: ntb_perf: fix printing of resource_size_tArnd Bergmann2018-01-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On 32-bit architectures, resource_size_t is usually 'unsigned int' or 'unsigned long' but not 'unsigned long long', so we get a warning about printing the wrong data: drivers/ntb/test/ntb_perf.c: In function 'perf_setup_peer_mw': drivers/ntb/test/ntb_perf.c:1390:35: error: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'resource_size_t {aka unsigned int}' [-Werror=format=] This changes the format string to the special %pa that is already used elsewhere in the same file. Fixes: b83003b3fdc1 ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: ntb_hw_idt: Set NTB_TOPO_SWITCH topologySerge Semin2018-01-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since Switchtec patch there has been a new topology added to the NTB API. It's called NTB_TOPO_SWITCH and dedicated for PCIe switch chips. Even though topo field isn't used within the IDT driver much, lets set it for the sake of unification. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: ntb_perf: Add full multi-port NTB API supportSerge Semin2018-01-291-601/+1219
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Former NTB Performance driver could only work with NTB devices, which got Scratchpads available and had just two ports. Since there are devices, which don't have Scratchpads and got more than two peer ports, the performance measuring tool needs to be rewritten. This patch adds the ability to test any available NTB peer. Additionally it allows to set NTB memory windows up using any available data exchange interface: Scratchpad or Message registers. Some cleanups are also added here. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: ntb_tool: Add full multi-port NTB API supportSerge Semin2018-01-291-580/+1240
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Former NTB Debugging tool driver supported only the limited functionality of the recently updated NTB API, which is now available to work with the truly NTB multi-port devices and devices, which got NTB Message registers instead of Scratchpads. This patch fully rewrites the driver so one would fully expose all the new NTB API interfaces. Particularly it concerns the Message registers, peer ports API, NTB link settings. Additional cleanups are also added here. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: ntb_pp: Add full multi-port NTB API supportSerge Semin2018-01-291-165/+282
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current Ping Pong driver can't truly work with multi-port devices. Additionally it requires the Scratchpad registers being available on NTB device. This patches rewrites the driver so one would perform the cyclic Ping-Pong algorithm around all the available NTB peers and makes it working with NTB hardware, which doesn't support Scratchpads, but such alternative as NTB Message register. Additional cleanups are also added here. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: Set dma mask and dma coherent mask to NTB devicesSerge Semin2018-01-294-2/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The dma_mask and dma_coherent_mask fields of the NTB struct device weren't initialized in hardware drivers. In fact it should be done instead of PCIe interface usage, since NTB clients are supposed to use NTB API and left unaware of real hardware implementation. In addition to that ntb_device_register() method shouldn't clear the passed ntb_dev structure, since it dma_mask is initialized by hardware drivers. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | NTB: Rename NTB messaging API methodsSerge Semin2018-01-291-15/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a common methods signature form used over all the NTB API like functions naming scheme, arguments names and order, etc. Recently added NTB messaging API IO callbacks were named a bit different so should be renamed to be in compliance with the rest of the API. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
| * | | | | ntb_hw_switchtec: fix logic errorArnd Bergmann2018-01-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Newer gcc (version 7 and 8 presumably) warn about a statement mixing the << operator with logical and: drivers/ntb/hw/mscc/ntb_hw_switchtec.c: In function 'switchtec_ntb_init_sndev': drivers/ntb/hw/mscc/ntb_hw_switchtec.c:888:24: error: '<<' in boolean context, did you mean '<' ? [-Werror=int-in-bool-context] My interpretation here is that the author must have intended a bitmask rather than a comparison, so I'm changing the '&&' to '&', which makes a lot more sense in the context. Fixes: 1b249475275d ("ntb_hw_switchtec: Allow using Switchtec NTB in multi-partition setups") Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jon Mason <jdmason@kudzu.us>
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