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* RDMA/cxgb4: Couple of abort fixesSteve Wise2011-06-17
| | | | | | | | | | | | | - fix a race where the driver could end up sending a close_con_req after an abort_rpl. In c4iw_ep_disconnect(), send abort or close request with the ep mutex held. - fix a hang where driver fails to wake up when a connection is reset during a normal close. Wake up any waiters in the interrupt path, and correctly cleanup after rdma_fini() failures. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* RDMA/cxgb4: Don't truncate MR lengthsSteve Wise2011-06-17
| | | | | | | Remove left-over code from T3 that limited MR sizes to 32b. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* RDMA/cxgb4: Don't exceed hw IQ depth limit for user CQsSteve Wise2011-06-17
| | | | | | | | | | | | Memory allocated for user CQs gets rounded up to the next page boundary. And after rounding, we recalculate the resulting IQ depth and we need to make sure we don't exceed the HW limits. This bug can result a much smaller CQ allocated than was expected if the HW size field is exceeded, resulting in CQ overflow failures. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2011-05-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: RDMA/cma: Save PID of ID's owner RDMA/cma: Add support for netlink statistics export RDMA/cma: Pass QP type into rdma_create_id() RDMA: Update exported headers list RDMA/cma: Export enum cma_state in <rdma/rdma_cm.h> RDMA/nes: Add a check for strict_strtoul() RDMA/cxgb3: Don't post zero-byte read if endpoint is going away RDMA/cxgb4: Use completion objects for event blocking IB/srp: Fix integer -> pointer cast warnings IB: Add devnode methods to cm_class and umad_class IB/mad: Return EPROTONOSUPPORT when an RDMA device lacks the QP required IB/uverbs: Add devnode method to set path/mode RDMA/ucma: Add .nodename/.mode to tell userspace where to create device node RDMA: Add netlink infrastructure RDMA: Add error handling to ib_core_init()
| * RDMA/cxgb4: Use completion objects for event blockingSteve Wise2011-05-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There exists a race condition when using wait_queue_head_t objects that are declared on the stack. This was being done in a few places where we are sending work requests to the FW and awaiting replies, but we don't have an endpoint structure with an embedded c4iw_wr_wait struct. So the code was allocating it locally on the stack. Bad design. The race is: 1) thread on cpuX declares the wait_queue_head_t on the stack, then posts a firmware WR with that wait object ptr as the cookie to be returned in the WR reply. This thread will proceed to block in wait_event_timeout() but before it does: 2) An interrupt runs on cpuY with the WR reply. fw6_msg() handles this and calls c4iw_wake_up(). c4iw_wake_up() sets the condition variable in the c4iw_wr_wait object to TRUE and will call wake_up(), but before it calls wake_up(): 3) The thread on cpuX calls c4iw_wait_for_reply(), which calls wait_event_timeout(). The wait_event_timeout() macro checks the condition variable and returns immediately since it is TRUE. So this thread never blocks/sleeps. The function then returns effectively deallocating the c4iw_wr_wait object that was on the stack. 4) So at this point cpuY has a pointer to the c4iw_wr_wait object that is no longer valid. Further its pointing to a stack frame that might now be in use by some other context/thread. So cpuY continues execution and calls wake_up() on a ptr to a wait object that as been effectively deallocated. This race, when it hits, can cause a crash in wake_up(), which I've seen under heavy stress. It can also corrupt the referenced stack which can cause any number of failures. The fix: Use struct completion, which supports on-stack declarations. Completions use a spinlock around setting the condition to true and the wake up so that steps 2 and 4 above are atomic and step 3 can never happen in-between. Signed-off-by: Steve Wise <swise@opengridcomputing.com>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds2011-05-20
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
| * | ipv4: Make caller provide on-stack flow key to ip_route_output_ports().David S. Miller2011-05-03
| | | | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge remote branch 'origin/master' into mergeBenjamin Herrenschmidt2011-05-20
|\ \ \ | | |/ | |/| | | | | | | | | | | | | Manual merge of arch/powerpc/kernel/smp.c and add missing scheduler_ipi() call to arch/powerpc/platforms/cell/interrupt.c Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | RDMA/cxgb4: EEH errors can hang the driverSteve Wise2011-05-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A few more EEH fixes: c4iw_wait_for_reply(): detect fatal EEH condition on timeout and return an error. The iw_cxgb4 driver was only calling ib_deregister_device() on an EEH event followed by a ib_register_device() when the device was reinitialized. However, the RDMA core doesn't allow multiple iterations of register/deregister by the provider. See drivers/infiniband/core/sysfs.c: ib_device_unregister_sysfs() where the kobject ref is held until the device is deallocated in ib_deallocate_device(). Calling deregister adds this kobj reference, and then a subsequent register call will generate a WARN_ON() from the kobject subsystem because the kobject is being initialized but is already initialized with the ref held. So the provider must deregister and dealloc when resetting for an EEH event, then alloc/register to re-initialize. To do this, we cannot use the device ptr as our ULD handle since it will change with each reallocation. This commit adds a ULD context struct which is used as the ULD handle, and then contains the device pointer and other state needed. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
| * | RDMA/cxgb4: Reset wait condition atomicallySteve Wise2011-05-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver was never really waiting for RDMA_WR/FINI completions because the condition variable used to determine if the completion happened was never reset, and this condition variable is reused for both connection setup and teardown. This causes various driver crashes under heavy loads due to releasing resources too early. The fix is to use atomic bits to correctly reset the condition immediately after the completion is detected. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
| * | RDMA/cxgb4: Fix missing parenthesesRoel Kluin2011-05-10
| | | | | | | | | | | | | | | | | | | | | | | | Parens are missing: '|' has a higher presedence than '?'. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
| * | RDMA/cxgb4: Initialization errors can cause crashSteve Wise2011-05-10
| | | | | | | | | | | | | | | | | | | | | c4iw_uld_add() must return ERR_PTR() values instead of NULL on failure. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
| * | RDMA/cxgb4: Don't change QP state outside EP lockSteve Wise2011-05-10
| |/ | | | | | | | | | | | | | | | | | | Concurrent ingress CLOSE and ULP ABORT operations causes a crash due to a race condition where the close path releases the EP lock and then tries to move the QP state to CLOSED. This must be done inside the EP lock to avoid the race. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* / cxgb4: use pgprot_writecombine() on powerpcNishanth Aravamudan2011-04-27
|/ | | | | | | | | | | | | Commit fe3cc0d99de6a9bf99b6c279a8afb5833888c1f7 ("powerpc: Add pgprot_writecombine") in benh's tree exposes the pgprot_writecombine() API to drivers on powerpc. cxgb4 has an open-coded version of the same, so use the common API now that it's available. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Steve Wise <swise@opengridcomputing.com> Cc: Anton Blanchard <anton@samba.org> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds2011-03-16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1480 commits) bonding: enable netpoll without checking link status xfrm: Refcount destination entry on xfrm_lookup net: introduce rx_handler results and logic around that bonding: get rid of IFF_SLAVE_INACTIVE netdev->priv_flag bonding: wrap slave state work net: get rid of multiple bond-related netdevice->priv_flags bonding: register slave pointer for rx_handler be2net: Bump up the version number be2net: Copyright notice change. Update to Emulex instead of ServerEngines e1000e: fix kconfig for crc32 dependency netfilter ebtables: fix xt_AUDIT to work with ebtables xen network backend driver bonding: Improve syslog message at device creation time bonding: Call netif_carrier_off after register_netdevice bonding: Incorrect TX queue offset net_sched: fix ip_tos2prio xfrm: fix __xfrm_route_forward() be2net: Fix UDP packet detected status in RX compl Phonet: fix aligned-mode pipe socket buffer header reserve netxen: support for GbE port settings ... Fix up conflicts in drivers/staging/brcm80211/brcmsmac/wl_mac80211.c with the staging updates.
| * ipv4: Create and use route lookup helpers.David S. Miller2011-03-12
| | | | | | | | | | | | | | The idea here is this minimizes the number of places one has to edit in order to make changes to how flows are defined and used. Signed-off-by: David S. Miller <davem@davemloft.net>
| * ipv4: Make output route lookup return rtable directly.David S. Miller2011-03-02
| | | | | | | | | | | | Instead of on the stack. Signed-off-by: David S. Miller <davem@davemloft.net>
| * ipv4: Kill can_sleep arg to ip_route_output_flow()David S. Miller2011-03-01
| | | | | | | | | | | | This boolean state is now available in the flow flags. Signed-off-by: David S. Miller <davem@davemloft.net>
| * ipv4: Make final arg to ip_route_output_flow to be boolean "can_sleep"David S. Miller2011-03-01
| | | | | | | | | | | | Since that is what the current vague "flags" argument means. Signed-off-by: David S. Miller <davem@davemloft.net>
* | RDMA/cxgb4: Debugfs dump_qp() updatesSteve Wise2011-03-14
| | | | | | | | | | | | | | | | - Show whether the SQ is in onchip memory or not. - Dump both SQ and RQ QIDs. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | RDMA/cxgb4: Dispatch FATAL event on EEH errorsSteve Wise2011-03-14
| | | | | | | | | | | | | | | | This at least kicks the user mode applications that are watching for device events. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | RDMA/cxgb4: Use ULP_MODE_TCPDDPSteve Wise2011-03-14
| | | | | | | | | | | | | | | | Set the ULP mode for initial RDMA connection setup to the proper DDP mode. This avoids wasting some HW resources while in streaming mode. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | RDMA/cxgb4: Enable on-chip SQ support by defaultSteve Wise2011-03-14
| | | | | | | | | | Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | RDMA/cxgb4: Do CIDX_INC updates every 1/16 CQ depth CQE reapsSteve Wise2011-03-14
| | | | | | | | | | | | | | | | This avoids the CIDX_INC overflow issue with T4A2 when running kernel RDMA applications. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | RDMA/cxgb4: Remove db_drop_taskSteve Wise2011-03-14
| | | | | | | | | | | | | | | | Unloading iw_cxgb4 can crash due to the unload code trying to use db_drop_task, which is uninitialized. So remove this dead code. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | RDMA/cxgb4: Turn on delayed ACKSteve Wise2011-03-14
|/ | | | | | | Set the default to on. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* RDMA/cxgb4: Set the correct device physical function for iWARP connectionsSteve Wise2011-01-28
| | | | | | | | The PF passed to FW was 0, causing PCI failures in an SR-IOV environment. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Cc: <stable@kernel.org> Signed-off-by: Roland Dreier <roland@purestorage.com>
* RDMA/cxgb4: Limit MAXBURST EQ context field to 256BSteve Wise2011-01-28
| | | | | | | | | MAXBURST cannot exceed 256B for on-chip queues. With a 512B MAXBURST, we can lock up the chip. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Cc: <stable@kernel.org> Signed-off-by: Roland Dreier <roland@purestorage.com>
* Merge branch 'for-next' of ↵Linus Torvalds2011-01-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits) Documentation/trace/events.txt: Remove obsolete sched_signal_send. writeback: fix global_dirty_limits comment runtime -> real-time ppc: fix comment typo singal -> signal drivers: fix comment typo diable -> disable. m68k: fix comment typo diable -> disable. wireless: comment typo fix diable -> disable. media: comment typo fix diable -> disable. remove doc for obsolete dynamic-printk kernel-parameter remove extraneous 'is' from Documentation/iostats.txt Fix spelling milisec -> ms in snd_ps3 module parameter description Fix spelling mistakes in comments Revert conflicting V4L changes i7core_edac: fix typos in comments mm/rmap.c: fix comment sound, ca0106: Fix assignment to 'channel'. hrtimer: fix a typo in comment init/Kconfig: fix typo anon_inodes: fix wrong function name in comment fix comment typos concerning "consistent" poll: fix a typo in comment ... Fix up trivial conflicts in: - drivers/net/wireless/iwlwifi/iwl-core.c (moved to iwl-legacy.c) - fs/ext4/ext4.h Also fix missed 'diabled' typo in drivers/net/bnx2x/bnx2x.h while at it.
| * infiniband: Only include mutex.h once in drivers/infiniband/hw/cxgb4/iw_cxgb4.hJesper Juhl2010-11-15
| | | | | | | | | | | | | | | | Only include the header linux/mutex.h once inside drivers/infiniband/hw/cxgb4/iw_cxgb4.h Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | RDMA/cxgb4: Don't re-init wait object in init/fini pathsSteve Wise2011-01-10
| | | | | | | | | | | | | | | | | | | | | | | | Re-initializing the wait object in rdma_init()/rdma_fini() causes a timing window which can lead to a deadlock during close. Once this deadlock hits, all RDMA activity over the T4 device will be stuck. There's no need to re-init the wait object, so remove it. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Cc: <stable@kernel.org> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* | RDMA/cxgb3,cxgb4: Remove dead codeStephen Hemminger2011-01-10
|/ | | | | | | | | This removes unused code found by running 'make namespacecheck'; compile tested only. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-10-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (63 commits) IB/qib: clean up properly if pci_set_consistent_dma_mask() fails IB/qib: Allow driver to load if PCIe AER fails IB/qib: Fix uninitialized pointer if CONFIG_PCI_MSI not set IB/qib: Fix extra log level in qib_early_err() RDMA/cxgb4: Remove unnecessary KERN_<level> use RDMA/cxgb3: Remove unnecessary KERN_<level> use IB/core: Add link layer type information to sysfs IB/mlx4: Add VLAN support for IBoE IB/core: Add VLAN support for IBoE IB/mlx4: Add support for IBoE mlx4_en: Change multicast promiscuous mode to support IBoE mlx4_core: Update data structures and constants for IBoE mlx4_core: Allow protocol drivers to find corresponding interfaces IB/uverbs: Return link layer type to userspace for query port operation IB/srp: Sync buffer before posting send IB/srp: Use list_first_entry() IB/srp: Reduce number of BUSY conditions IB/srp: Eliminate two forward declarations IB/mlx4: Signal node desc changes to SM by using FW to generate trap 144 IB: Replace EXTRA_CFLAGS with ccflags-y ...
| *-. Merge branches 'amso1100', 'cma', 'cxgb3', 'cxgb4', 'ehca', 'iboe', 'ipoib', ↵Roland Dreier2010-10-26
| |\ \ | | | | | | | | | | | | 'misc', 'mlx4', 'nes', 'qib' and 'srp' into for-next
| | | * IB: Replace EXTRA_CFLAGS with ccflags-ymatt mooney2010-10-23
| | |/ | |/| | | | | | | | | | Signed-off-by: matt mooney <mfm@muteddisk.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Remove unnecessary KERN_<level> useJoe Perches2010-10-26
| | | | | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Use cxgb4 service for packet gl to skbSteve Wise2010-10-23
| | | | | | | | | | | | | | | | | | | | | | | | Remove the local service t4_pktgl_to_skb() and use cxgb4_pktgl_to_skb() exported by cxgb4. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Export T4 TCP MIBSteve Wise2010-10-23
| | | | | | | | | | | | | | | Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Use simple_read_from_buffer() for debugfs handlersSteve Wise2010-10-11
| | | | | | | | | | | | | | | | | | | | | We can replace our equivalent open-coded version. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Add default_llseek to debugfs filesSteve Wise2010-10-11
| | | | | | | | | | | | | | | | | | | | | Incorporate BKL removal changes. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Fastreg NSMR fixesSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Remove dsgl support - doesn't work in T4. - Wrap the immediate PBL as needed when building it in the wr. - Adjust max pbl depth allowed based on ulptx alignment requirements. - Bump the slots per SQ to 5 to allow up to 128MB fast registers. - Advertise fastreg support by default. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Don't set completion flag for read requestsSteve Wise2010-09-28
| | | | | | | | | | | | | | | Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Set the default TCP send window to 128KBSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | This helps with large IO throughput. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Use a mutex for QP and EP state transitionsSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the connection setup/teardown paths to the workq thread removing spin lock/irq disable requirements for these paths. This allows calls down to the LLD for EP and QP state transition actions to be atomic with respect to processing CPL messages coming up from the HW. Namely, calls to rdma_init() and rdma_fini() can now be called with the mutex held avoiding many race conditions with the abort path. The QP spinlock is still used but only to manipulate the qp state. This allows the fastpaths, poll, post_send, and pos_recv, to run in the irq context. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Support on-chip SQsSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | T4 support on-chip SQs to reduce latency. This patch adds support for this in iw_cxgb4: - Manage ocqp memory like other adapter mem resources. - Allocate user mode SQs from ocqp mem if available. - Map ocqp mem to user process using write combining. - Map PCIE_MA_SYNC reg to user process. Bump uverbs ABI. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Centralize the wait logicSteve Wise2010-09-28
| | | | | | | | | | | | | | | Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: debugfs files for dumping active stagsSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add "stags" debugfs file. This is useful for examining the TPTE and PBL entries in adapter memory. It allows scripts to dump just the active entries. Also clean up the "qps" file handlers and shared common code. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Log HW lack-of-resource errorsSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | This helps debug cases where HW resources are depleted. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Handle CPL_RDMA_TERMINATE messagesSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | | | | T4 FW sends up CPL_RDMA_TERMINATE to indicate a peer TERM. This triggers the QP moving to TERMINATE state. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| | * RDMA/cxgb4: Ignore TERMINATE CQEsSteve Wise2010-09-28
| | | | | | | | | | | | | | | | | | | | | T4 incorrectly inserts TERM CQEs into the CQ. Silently ignore them. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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