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2017-10-20s390/qeth: don't dump control cmd twiceJulian Wiedmann1-1/+0
A few lines down, qeth_prepare_control_data() makes further changes to the control cmd buffer, and then also writes a trace entry for it. So the first entry just pollutes the trace file with intermediate data, drop it. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: support GRO flush timerJulian Wiedmann1-1/+1
Switch to napi_complete_done(), and thus enable delayed GRO flushing. The timeout is configured via /sys/class/net/<if>/gro_flush_timeout. Default timeout is 0, so no change in behaviour. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: try harder to get packets from RX bufferJulian Wiedmann1-3/+1
Current code bails out when two subsequent buffer elements hold insufficient data to contain a qeth_hdr packet descriptor. This seems reasonable, but it would be legal for quirky hardware to leave a few elements empty and then present packets in a subsequent element. These packets would currently be dropped. So make sure to check all buffer elements, until we hit the LAST_ENTRY indication. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: consolidate skb allocationJulian Wiedmann1-40/+31
Move the allocation of SG skbs into the main path. This allows for a little code sharing, and handling ENOMEM from within one place. As side effect, L2 SG skbs now get the proper amount of additional headroom (read: zero) instead of the hard-coded ETH_HLEN. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: clean up page frag creationJulian Wiedmann1-20/+11
Replace the open-coded skb_add_rx_frag(), and use a fall-through to remove some duplicated code. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: no VLAN support on OSMJulian Wiedmann1-11/+6
Instead of silently discarding VLAN registration requests on OSM, just indicate that this card type doesn't support VLAN. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: don't verify device when setting MAC addressJulian Wiedmann1-23/+0
There's no reason why l2_set_mac_address() should ever be called for a netdevice that's not owned by qeth. It's certainly not required for VLAN devices, which have their own netdev_ops. Also: 1) we don't do such validation for any of the other netdev_ops routines. 2) the code in question clearly has never been actually exercised; it's broken. After determining that the device is not owned by qeth, it would still use dev->ml_priv to write a qeth trace entry. Remove the check, and its helper that walked the global card list. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: clean up initial MTU determinationJulian Wiedmann1-10/+4
1. Drop the support for Token Ring, 2. use the ETH_DATA_LEN macro for the default L2 MTU, 3. handle OSM via the default case (as OSM is L2-only), and 4. document why the L3 MTU is reduced. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: fix early exit from error pathJulian Wiedmann1-2/+4
When the allocation of the addr buffer fails, we need to free our refcount on the inetdevice before returning. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: use kstrtobool() in qeth_bridgeport_hostnotification_store()Andy Shevchenko1-8/+5
The sysfs enabled value is a boolean, so kstrtobool() is a better fit for parsing the input string since it does the range checking for us. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: remove duplicated device matchingJulian Wiedmann4-50/+9
With commit "s390/ccwgroup: tie a ccwgroup driver to its ccw driver", the ccwgroup core now ensures that a qeth group device only consists of ccw devices which are supported by qeth. Therefore remove qeth's internal device matching, and use .driver_info to determine the card type. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/drivers: use setup_timerAllen Pais1-6/+2
Use setup_timer function instead of initializing timer with the function and data fields. Signed-off-by: Allen Pais <allen.lkml@gmail.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20s390/qeth: rely on kernel for feature recoveryJulian Wiedmann2-23/+19
When recovering a device, qeth needs to re-run the IPA commands that enable all previously active HW features. Instead of duplicating qeth_set_features(), let netdev_update_features() recover the missing HW features from dev->wanted_features. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller6-9/+36
2017-09-19s390/cio: recover from bad pathsSebastian Ott4-3/+24
In some situations we don't receive notification from firmware that a previously unusable channelpath is usable again. Schedule recovery for devices that return from path verification without using all potentially usable paths. The recovery thread will periodically trigger a path verification on the affected devices. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Suggested-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-19s390/scm_blk: consistently use blk_status_t as error typeSebastian Ott1-3/+3
Fix these warnings found by sparse: drivers/s390/block/scm_blk.c:257:24: warning: incorrect type in assignment (different base types) drivers/s390/block/scm_blk.c:257:24: expected int [signed] <noident> drivers/s390/block/scm_blk.c:257:24: got restricted blk_status_t [usertype] error drivers/s390/block/scm_blk.c:420:33: warning: incorrect type in argument 2 (different base types) drivers/s390/block/scm_blk.c:420:33: expected restricted blk_status_t [usertype] error drivers/s390/block/scm_blk.c:420:33: got int [signed] <noident> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-18s390/qeth: tidy up parameter naming for qeth_do_send_packet()Jens Remus1-1/+2
Cppcheck reports the following for drivers/s390/net/qeth_core.h: warning - line 1560 - Function 'qeth_do_send_packet' argument order different: declaration 'card, queue, skb, hdr, hd_len, offset, elements' definition 'card, queue, skb, hdr, offset, hd_len, elements_needed'. Match the naming in the function's declaration against its definition. Signed-off-by: Jens Remus <jremus@linux.vnet.ibm.com> Reviewed-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: fold VLAN handling into l3_rebuild_skb()Julian Wiedmann1-16/+11
Move the overly complicated VLAN processing from the L3 RX handler into its l3_rebuild_skb() helper. No change in functionality. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: translate SETVLAN/DELVLAN errorsJulian Wiedmann2-12/+36
Properly return any error encountered during VLAN processing to the the caller. Resulting change in behaviour: if SETVLAN fails while registering a new VLAN ID, the stack no longer creates the corresponding vlan device. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: simplify L3 sysfs group managementJulian Wiedmann1-33/+12
Use the right helpers to create/remove all attribute groups in one go. Suggested-by: Hans Wippel <hwippel@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: don't take queue lock in send_packet_fast()Julian Wiedmann4-22/+9
Locking the output queue prior to TX is needed on OSA devices, to synchronize against a packing flush from the TX completion code (via qeth_check_outbound_queue()). But send_packet_fast() is only used for IQDs, which don't do packing. So remove the locking, and apply some easy cleanups. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: remove unused code in qdio_establish_cq()Julian Wiedmann1-1/+0
Storing the number of input buffers into 'i' has no effect, it is immediately re-assigned in the next line. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: add VNICC get/set timeout supportHans Wippel5-5/+190
HiperSockets allow configuring so called VNIC Characteristics (VNICC) that influence how the underlying hardware handles packets. For VNICCs, additional commands for getting and setting timeouts are available. Currently, the learning VNICC uses these commands. * Learning VNICC: If learning is enabled on a qeth device, the device learns the source MAC addresses of outgoing packets and incoming packets to those learned MAC addresses are received. For learning, the timeout specifies the idle period in seconds, after which the underlying hardware removes a learned MAC address again. This patch adds support for the IPA commands that are required to get and set the current timeout values for the learning VNIC characteristic. Also, it introduces the sysfs interface that allows users to configure the timeout. Signed-off-by: Hans Wippel <hwippel@linux.vnet.ibm.com> Reviewed-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: add VNICC enable/disable supportHans Wippel5-14/+392
HiperSocket devices allow enabling and disabling so called VNIC Characteristics (VNICC) that influence how the underlying hardware handles packets. These VNICCs are: * Flooding VNICC: Flooding allows specifying if packets to unknown destination MAC addresses are received by the qeth device. * Multicast flooding VNICC: Multicast flooding allows specifying if packets to multicast MAC addresses are received by the qeth device. * Learning VNICC: If learning is enabled on a qeth device, the device learns the source MAC addresses of outgoing packets and incoming packets to those learned MAC addresses are received. * Takeover setvmac VNICC: If takeover setvmac is configured on a qeth device, the MAC address of this device can be configured on a different qeth device with the setvmac IPA command. * Takeover by learning VNICC: If takeover learning is enabled on a qeth device, the MAC address of this device can be learned (learning VNICC) on a different qeth device. * BridgePort invisible VNICC: If BridgePort invisible is enabled on a qeth device, (1) packets from this device are not sent to a BridgePort enabled qeth device and (2) packets coming from a BridgePort enabled qeth device are not received by this device. * Receive broadcast VNICC: Receive broadcast allows configuring if a qeth device receives packets with the broadcast destination MAC address. This patch adds support for the IPA commands that are required to enable and disable these VNIC characteristics on qeth devices. As a prerequisite, it also adds the query commands IPA command. The query commands IPA command allows requesting the supported commands for each characteristic from the underlying hardware. Additionally, this patch provides users with a sysfs user interface to enable/disable the VNICCs mentioned above. Signed-off-by: Hans Wippel <hwippel@linux.vnet.ibm.com> Reviewed-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-18s390/qeth: add basic VNICC supportHans Wippel4-4/+172
VNIC Characteristics (VNICC) are features of HiperSockets that define how packets are handled by the underlying network hardware. For example, if the VNICC flooding is configured on a qeth device, ethernet frames to unknown destination MAC addresses are received. Currently, there is support for seven VNICCs: flooding, multicast flooding, receive broadcast, learning, takeover learning, takeover setvmac, bridge invisible. Also, six IPA commands exist for configuring VNICCs on a qeth device: query characteristics, query commands, enable characteristic, disable characteristic, set timeout, get timeout. This patch adds the basic code infrastructure for VNICC support to qeth. It allows querying VNICC support from the underlying hardware. To this end, it adds: * basic message formats for IPA commands * basic data structures * basic error handling * query characteristics IPA command support The query characteristics IPA command allows requesting the currently supported and currently enabled VNIC characteristics from the underlying hardware. Support for the other IPA commands and for the configuration of VNICCs is added in follow-up patches together with the respective user interface functions. Signed-off-by: Hans Wippel <hwippel@linux.vnet.ibm.com> Reviewed-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-13s390/dasd: fix race during dasd initializationStefan Haberland1-3/+9
Fix a panic in blk_mq_hctx_has_pending() that is caused by a racy call to blk_mq_run_hw_queues in a dasd function that might get called with the request queue not yet initialized during initialization. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-12Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds7-227/+262
Pull more s390 updates from Martin Schwidefsky: "The second patch set for the 4.14 merge window: - Convert the dasd device driver to the blk-mq interface. - Provide three zcrypt interfaces for vfio_ap. These will be required for KVM guest access to the crypto cards attached via the AP bus. - A couple of memory management bug fixes." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/dasd: blk-mq conversion s390/mm: use a single lock for the fields in mm_context_t s390/mm: fix race on mm->context.flush_mm s390/mm: fix local TLB flushing vs. detach of an mm address space s390/zcrypt: externalize AP queue interrupt control s390/zcrypt: externalize AP config info query s390/zcrypt: externalize test AP queue s390/mm: use VM_BUG_ON in crst_table_[upgrade|downgrade]
2017-09-08s390/dasd: blk-mq conversionStefan Haberland3-165/+193
Use new blk-mq interfaces. Use multiple queues and also use the block layer complete helper that finish the IO on the CPU that initiated it. Reviewed-by: Jan Hoeppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-07Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds12-110/+178
Pull SCSI updates from James Bottomley: "This is mostly updates of the usual suspects: lpfc, qla2xxx, hisi_sas, megaraid_sas, zfcp and a host of minor updates. The major driver change here is the elimination of the block based cciss driver in favour of the SCSI based hpsa driver (which now drives all the legacy cases cciss used to be required for). Plus a reset handler clean up and the redo of the SAS SMP handler to use bsg lib" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (279 commits) scsi: scsi-mq: Always unprepare before requeuing a request scsi: Show .retries and .jiffies_at_alloc in debugfs scsi: Improve requeuing behavior scsi: Call scsi_initialize_rq() for filesystem requests scsi: qla2xxx: Reset the logo flag, after target re-login. scsi: qla2xxx: Fix slow mem alloc behind lock scsi: qla2xxx: Clear fc4f_nvme flag scsi: qla2xxx: add missing includes for qla_isr scsi: qla2xxx: Fix an integer overflow in sysfs code scsi: aacraid: report -ENOMEM to upper layer from aac_convert_sgraw2() scsi: aacraid: get rid of one level of indentation scsi: aacraid: fix indentation errors scsi: storvsc: fix memory leak on ring buffer busy scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough scsi: smartpqi: remove the smp_handler stub scsi: hpsa: remove the smp_handler stub scsi: bsg-lib: pass the release callback through bsg_setup_queue scsi: Rework handling of scsi_device.vpd_pg8[03] scsi: Rework the code for caching Vital Product Data (VPD) scsi: rcu: Introduce rcu_swap_protected() ...
2017-09-07Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-blockLinus Torvalds2-3/+3
Pull block layer updates from Jens Axboe: "This is the first pull request for 4.14, containing most of the code changes. It's a quiet series this round, which I think we needed after the churn of the last few series. This contains: - Fix for a registration race in loop, from Anton Volkov. - Overflow complaint fix from Arnd for DAC960. - Series of drbd changes from the usual suspects. - Conversion of the stec/skd driver to blk-mq. From Bart. - A few BFQ improvements/fixes from Paolo. - CFQ improvement from Ritesh, allowing idling for group idle. - A few fixes found by Dan's smatch, courtesy of Dan. - A warning fixup for a race between changing the IO scheduler and device remova. From David Jeffery. - A few nbd fixes from Josef. - Support for cgroup info in blktrace, from Shaohua. - Also from Shaohua, new features in the null_blk driver to allow it to actually hold data, among other things. - Various corner cases and error handling fixes from Weiping Zhang. - Improvements to the IO stats tracking for blk-mq from me. Can drastically improve performance for fast devices and/or big machines. - Series from Christoph removing bi_bdev as being needed for IO submission, in preparation for nvme multipathing code. - Series from Bart, including various cleanups and fixes for switch fall through case complaints" * 'for-4.14/block' of git://git.kernel.dk/linux-block: (162 commits) kernfs: checking for IS_ERR() instead of NULL drbd: remove BIOSET_NEED_RESCUER flag from drbd_{md_,}io_bio_set drbd: Fix allyesconfig build, fix recent commit drbd: switch from kmalloc() to kmalloc_array() drbd: abort drbd_start_resync if there is no connection drbd: move global variables to drbd namespace and make some static drbd: rename "usermode_helper" to "drbd_usermode_helper" drbd: fix race between handshake and admin disconnect/down drbd: fix potential deadlock when trying to detach during handshake drbd: A single dot should be put into a sequence. drbd: fix rmmod cleanup, remove _all_ debugfs entries drbd: Use setup_timer() instead of init_timer() to simplify the code. drbd: fix potential get_ldev/put_ldev refcount imbalance during attach drbd: new disk-option disable-write-same drbd: Fix resource role for newly created resources in events2 drbd: mark symbols static where possible drbd: Send P_NEG_ACK upon write error in protocol != C drbd: add explicit plugging when submitting batches drbd: change list_for_each_safe to while(list_first_entry_or_null) drbd: introduce drbd_recv_header_maybe_unplug ...
2017-09-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds9-329/+356
Pull networking updates from David Miller: 1) Support ipv6 checksum offload in sunvnet driver, from Shannon Nelson. 2) Move to RB-tree instead of custom AVL code in inetpeer, from Eric Dumazet. 3) Allow generic XDP to work on virtual devices, from John Fastabend. 4) Add bpf device maps and XDP_REDIRECT, which can be used to build arbitrary switching frameworks using XDP. From John Fastabend. 5) Remove UFO offloads from the tree, gave us little other than bugs. 6) Remove the IPSEC flow cache, from Florian Westphal. 7) Support ipv6 route offload in mlxsw driver. 8) Support VF representors in bnxt_en, from Sathya Perla. 9) Add support for forward error correction modes to ethtool, from Vidya Sagar Ravipati. 10) Add time filter for packet scheduler action dumping, from Jamal Hadi Salim. 11) Extend the zerocopy sendmsg() used by virtio and tap to regular sockets via MSG_ZEROCOPY. From Willem de Bruijn. 12) Significantly rework value tracking in the BPF verifier, from Edward Cree. 13) Add new jump instructions to eBPF, from Daniel Borkmann. 14) Rework rtnetlink plumbing so that operations can be run without taking the RTNL semaphore. From Florian Westphal. 15) Support XDP in tap driver, from Jason Wang. 16) Add 32-bit eBPF JIT for ARM, from Shubham Bansal. 17) Add Huawei hinic ethernet driver. 18) Allow to report MD5 keys in TCP inet_diag dumps, from Ivan Delalande. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1780 commits) i40e: point wb_desc at the nvm_wb_desc during i40e_read_nvm_aq i40e: avoid NVM acquire deadlock during NVM update drivers: net: xgene: Remove return statement from void function drivers: net: xgene: Configure tx/rx delay for ACPI drivers: net: xgene: Read tx/rx delay for ACPI rocker: fix kcalloc parameter order rds: Fix non-atomic operation on shared flag variable net: sched: don't use GFP_KERNEL under spin lock vhost_net: correctly check tx avail during rx busy polling net: mdio-mux: add mdio_mux parameter to mdio_mux_init() rxrpc: Make service connection lookup always check for retry net: stmmac: Delete dead code for MDIO registration gianfar: Fix Tx flow control deactivation cxgb4: Ignore MPS_TX_INT_CAUSE[Bubble] for T6 cxgb4: Fix pause frame count in t4_get_port_stats cxgb4: fix memory leak tun: rename generic_xdp to skb_xdp tun: reserve extra headroom only when XDP is set net: dsa: bcm_sf2: Configure IMP port TC2QOS mapping net: dsa: bcm_sf2: Advertise number of egress queues ...
2017-09-06s390/zcrypt: externalize AP queue interrupt controlHarald Freudenberger2-4/+29
KVM has a need to control the interrupts on real and virtualized AP queue devices. This fix provides a new function to control the interrupt facilities of an AP queue device. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-06s390/zcrypt: externalize AP config info queryHarald Freudenberger2-16/+16
KVM has a need to fetch the crypto configuration information as it is returned by the PQAP(QCI) instruction. This patch introduces a new API ap_query_configuration() which provides this info in a handy way for the caller. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-06s390/zcrypt: externalize test AP queueTony Krowiak3-42/+24
Under certain specified conditions, the Test AP Queue (TAPQ) subfunction of the Process Adjunct Processor Queue (PQAP) instruction will be intercepted by a guest VM. The guest VM must have a means for executing the intercepted instruction. The vfio_ap driver will provide an interface to execute the PQAP(TAPQ) instruction subfunction on behalf of a guest VM. The code for executing the AP instructions currently resides in the AP bus. This patch refactors the AP bus code to externalize access to the PQAP(TAPQ) instruction subfunction to make it available to the vfio_ap driver. Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com> Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-05Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds26-102/+398
Pull s390 updates from Martin Schwidefsky: "The first part of the s390 updates for 4.14: - Add machine type 0x3906 for IBM z14 - Add IBM z14 TLB flushing improvements for KVM guests - Exploit the TOD clock epoch extension to provide a continuous TOD clock afer 2042/09/17 - Add NIAI spinlock hints for IBM z14 - Rework the vmcp driver and use CMA for the respone buffer of z/VM CP commands - Drop some s390 specific asm headers and use the generic version - Add block discard for DASD-FBA devices under z/VM - Add average request times to DASD statistics - A few of those constify patches which seem to be in vogue right now - Cleanup and bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (50 commits) s390/mm: avoid empty zero pages for KVM guests to avoid postcopy hangs s390/dasd: Add discard support for FBA devices s390/zcrypt: make CPRBX const s390/uaccess: avoid mvcos jump label s390/mm: use generic mm_hooks s390/facilities: fix typo s390/vmcp: simplify vmcp_response_free() s390/topology: Remove the unused parent_node() macro s390/dasd: Change unsigned long long to unsigned long s390/smp: convert cpuhp_setup_state() return code to zero on success s390: fix 'novx' early parameter handling s390/dasd: add average request times to dasd statistics s390/scm: use common completion path s390/pci: log changes to uid checking s390/vmcp: simplify vmcp_ioctl() s390/vmcp: return -ENOTTY for unknown ioctl commands s390/vmcp: split vmcp header file and move to uapi s390/vmcp: make use of contiguous memory allocator s390/cpcmd,vmcp: avoid GFP_DMA allocations s390/vmcp: fix uaccess check and avoid undefined behavior ...
2017-09-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+1
Three cases of simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-31Merge tag 'vfio-ccw-20170724' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/vfio-ccw into fixesMartin Schwidefsky1-1/+1
Pull vfio-ccw fix from Cornelia Huck: "A bugfix in the ccw translation code."
2017-08-29s390/dasd: Add discard support for FBA devicesJan Höppner4-4/+221
The z/VM hypervisor provides virtual disks (VDISK) which are backed by main memory of the hypervisor. Those devices are seen as DASD FBA disks within the Linux guest. Whenever data is written to such a device, memory is allocated on-the-fly by z/VM accordingly. This memory, however, is not being freed if data on the device is deleted by the guest OS. In order to make memory usable after deletion again, add discard support to the FBA discipline. While at it, update comments regarding the DASD_FEATURE_* flags. Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-08-29s390/zcrypt: make CPRBX constBhumika Goyal1-1/+1
Make this const as it is only used in a copy operation. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-08-29s390/vmcp: simplify vmcp_response_free()Heiko Carstens1-3/+2
Get rid of the goto and "out" label within vmcp_response_free() which I added. This just makes the code harder to read than necessary. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-08-23block: replace bi_bdev with a gendisk pointer and partitions indexChristoph Hellwig2-3/+3
This way we don't need a block_device structure to submit I/O. The block_device has different life time rules from the gendisk and request_queue and is usually only available when the block device node is open. Other callers need to explicitly create one (e.g. the lightnvm passthrough code, or the new nvme multipathing code). For the actual I/O path all that we need is the gendisk, which exists once per block device. But given that the block layer also does partition remapping we additionally need a partition index, which is used for said remapping in generic_make_request. Note that all the block drivers generally want request_queue or sometimes the gendisk, so this removes a layer of indirection all over the stack. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-08-23s390/dasd: Change unsigned long long to unsigned longJan Höppner8-18/+14
Unsigned long long and unsigned long were different in size for 31-bit. For 64-bit the size for both datatypes is 8 Bytes and since the support for 31-bit is long gone we can clean up a little and change everything to unsigned long. Change get_phys_clock() along the way to accept unsigned long as well so that the DASD code can be consistent. Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-08-23s390/dasd: add average request times to dasd statisticsStefan Haberland2-4/+34
Add average times to the DASD statistics interface. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-08-18s390/qeth: use skb_cow_head() for L2 OSA xmitJulian Wiedmann3-22/+65
Taking a full copy via skb_realloc_headroom() on every xmit is overkill and wastes CPU time; all we actually need is to push on the qeth_hdr. So rework the L2 OSA TX path to avoid the copy. Minor complications arise because struct qeth_hdr must not cross a page boundary. So add a new helper qeth_push_hdr() that catches this, and falls back to the hdr cache that we already use for IQDs. This change uncovered that qeth's TX completion takes rather long. Now that we no longer free the original skb straight away and thus call skb->destructor later than before, throughput regresses significantly. For now, restore old behaviour by adding an explicit skb_orphan(), and a big TODO to improve the TX completion time. Tested-by: Nils Hoppmann <niho@de.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-18s390/qeth: unify code to build header elementsJulian Wiedmann1-14/+15
After plenty of refactoring, use hd_len as single indication that the skb needs a dedicated header element. This preserves existing behaviour for TSO, as 'hdr' always points to skb->data. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-18s390/qeth: pass full IQD header length to fill_buffer()Julian Wiedmann3-4/+4
This is a prerequisite for unifying the code to build header elements. The TSO header has a different size, so we can no longer rely on implicitly adding the size of a normal qeth_hdr. No functional change. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-18s390/qeth: pass TSO data offset to fill_buffer()Julian Wiedmann4-10/+8
For TSO we need to skip the skb's qeth/IP/TCP headers when mapping it into buffer elements. Instead of (mis)using skb_pull(), pass a corresponding offset to fill_buffer() like we already do for IQDs. No actual change in the resulting TSO buffers. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-18s390/qeth: pass TSO header length to fill_buffer()Julian Wiedmann4-21/+23
The TSO code already calculates the length of its header element, no need to duplicate this in the low-level code again. Use this opportunity to make hd_len unsigned, and for TSO match its calculation to what tso_fill_header() does. No functional change. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-18s390/qeth: pass full data length to l2_fill_header()Julian Wiedmann1-6/+6
For IQD we already need to fix up the qeth_hdr's length field, and future changes will require more flexibility for OSA as well. The device-specific path knows best what header length it requires, so just pass it from there. While at it, remove the unused qeth_card parameter. No functional change. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-18s390/qeth: split L2 xmit pathsJulian Wiedmann1-102/+123
l2_hard_start_xmit() actually doesn't contain much shared code, and having device-specific paths makes isolated changes a lot easier. So split it into three routines for IQD, OSN and OSD/OSM/OSX. No functional change. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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