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path: root/drivers/infiniband/hw/qib/qib_driver.c
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* IB/qib: Convert opcode counters to per-contextMike Marciniszyn2013-06-211-1/+0
| | | | | | | | | | | | | | | | | This fix changes the opcode relative counters for receive to per context. Profiling has shown that when mulitple contexts are being used there is a lot of cache activity associated with these counters. The code formerly kept these counters per port, but only provided the interface to read per HCA. This patch converts the read of counters to per HCA and adds the debugfs hooks to be able to read the file as a sequence of opcodes. Reviewed-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/qib: change QLogic to IntelVinit Agnihotri2013-03-221-2/+3
| | | | | | | | | | These changes modify the qib driver as part of acquiring the InfiniBand assets of QLogic. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/qib: Add a qib driver versionDean Luick2012-09-301-1/+2
| | | | | | Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/qib: checkpatch fixesMike Marciniszyn2012-07-191-6/+9
| | | | | | | | | | | | | Elminate some simple_strto* usage. checkpatch also noted pr_ conversations, which have been done as recommended. The pr_fmt() define is used to shorten line length. Other multi-line string warnings are also elmininated. Reviewed-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/qib: Add prefetch for eager buffersMike Marciniszyn2012-05-141-1/+4
| | | | | | | | Add a prefetch call when a packet has been stored. The nature of the prefetch is correctly determined by the alternatives mechanism. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/qib: Fix style issuesMike Marciniszyn2012-01-031-2/+1
| | | | | | | More style issues revealed with checkpatch.pl -f. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* Merge branch 'modsplit-Oct31_2011' of ↵Linus Torvalds2011-11-061-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux * 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits) Revert "tracing: Include module.h in define_trace.h" irq: don't put module.h into irq.h for tracking irqgen modules. bluetooth: macroize two small inlines to avoid module.h ip_vs.h: fix implicit use of module_get/module_put from module.h nf_conntrack.h: fix up fallout from implicit moduleparam.h presence include: replace linux/module.h with "struct module" wherever possible include: convert various register fcns to macros to avoid include chaining crypto.h: remove unused crypto_tfm_alg_modname() inline uwb.h: fix implicit use of asm/page.h for PAGE_SIZE pm_runtime.h: explicitly requires notifier.h linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h miscdevice.h: fix up implicit use of lists and types stop_machine.h: fix implicit use of smp.h for smp_processor_id of: fix implicit use of errno.h in include/linux/of.h of_platform.h: delete needless include <linux/module.h> acpi: remove module.h include from platform/aclinux.h miscdevice.h: delete unnecessary inclusion of module.h device_cgroup.h: delete needless include <linux/module.h> net: sch_generic remove redundant use of <linux/module.h> net: inet_timewait_sock doesnt need <linux/module.h> ... Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in - drivers/media/dvb/frontends/dibx000_common.c - drivers/media/video/{mt9m111.c,ov6650.c} - drivers/mfd/ab3550-core.c - include/linux/dmaengine.h
| * infiniband: Fix up module files that need to include module.hPaul Gortmaker2011-10-311-0/+1
| | | | | | | | | | | | | | | | They had been getting it implicitly via device.h but we can't rely on that for the future, due to a pending cleanup so fix it now. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* | IB/qib: Remove s_lock around header validationMike Marciniszyn2011-10-211-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | Review of qib_ruc_check_hdr() shows that the s_lock is not required in the normal case. The r_lock is held in all cases, and protects the qp fields that are read. The s_lock will be needed to around the call to qib_migrate_qp() to insure that the send engine sees a consistent set of fields. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | IB/qib: Use RCU for qpn lookupMike Marciniszyn2011-10-211-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The heavy weight spinlock in qib_lookup_qpn() is replaced with RCU. The hash list itself is now accessed via jhash functions instead of mod. The changes should benefit multiple receive contexts in different processors by not contending for the lock just to read the hash structures. The patch also adds a lookaside_qp (pointer) and a lookaside_qpn in the context. The interrupt handler will test the current packet's qpn against lookaside_qpn if the lookaside_qp pointer is non-NULL. The pointer is NULL'ed when the interrupt handler exits. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* | IB/qib: Eliminate divide/mod in converting idx to egr buf pointerMike Marciniszyn2011-10-211-3/+3
|/ | | | | | | | | The context init now saves a shift from rcvegrbufs_perchunk rcvegrbufs_perchunk_shift using ilog2. A BUG_ON() protects the power of 2 assumption. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
* IB/qib: Issue pre-emptive NAKs on eager buffer overflowMike Marciniszyn2011-01-101-4/+137
| | | | | | | | | | | | Under congestion resulting in eager buffer overflow attempt to send pre-emptive NAKs if header queue entries with TID errors are generated and a valid header is present. This prevents long timeouts and flow restarts if a trailing set of packets are dropped due to eager overflows. Pre-emptive NAKs are currently only supported for RDMA writes. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* IB/qib: Fix interrupt mitigationMike Marciniszyn2011-01-101-2/+2
| | | | | | | | | | | For SusieQ we need to write to the interrupt timer register before updating the header queue head with interrupt count. This is to ensure that the timer is enabled properly and a receive available interrupt is delivered. Otherwise this interrupt can be lost if the receiver header/eager queues are full before the timer is enabled. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* IB/qib: Avoid duplicate writes to the rcv head registerMike Marciniszyn2011-01-101-1/+9
| | | | | | | | Avoid duplicate writes to the head register as this can lead to lost interrupts if the context goes full before the second write is done. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* IB/qib: Limit the number of packets processed per interruptRalph Campbell2010-08-031-1/+1
| | | | | | | | | Don't processes too many packets without allowing other IRQ functions a chance to run. Otherwise, there is a chance of getting a "soft lockup" messages and poor application response times. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* IB/qib: Add new qib driver for QLogic PCIe InfiniBand adaptersRalph Campbell2010-05-231-0/+665
Add a low-level IB driver for QLogic PCIe adapters. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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