Commit Graph

22 Commits

Author SHA1 Message Date
Alexander Schmidt e675b6db12 IB/ehca: Catch failing ioremap()
When ioremap() fails with a NULL pointer, catch the error and pass it
to the caller of create_qp() or create_cq() instead of trying to
dereference the NULL pointer later on.

Signed-off-by: Alexander Schmidt <alexs@linux.vnet.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-07-21 12:46:29 -07:00
Stefan Roscher 1988d1fa1a IB/ehca: Remove unnecessary memory operations for userspace queue pairs
The queue map for flush completion circumvention is only used for
kernel space queue pairs.  This patch skips the allocation of the
queue maps in case the QP is created for userspace.  In addition, this
patch does not iomap the galpas for kernel usage if the queue pair is
only used in userspace.  These changes will improve the performance of
creation of userspace queue pairs.

Signed-off-by: Stefan Roscher <stefan.roscher@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2009-05-13 16:52:43 -07:00
Stephen Rothwell ee96aae573 IB/ehca: Use consistent types for ehca_plpar_hcall9()
ehca_plpar_hcall9() takes an unsigned long array, so make all callers
pass that in.  This fixes warnings introduced by commit fe333321
("powerpc: Change u64/s64 to a long long integer type"), which changed
u64 from unsigned long to unsigned long long.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2009-01-16 14:55:40 -08:00
Stephen Rothwell 3750f60557 IB/ehca: Fix printk format warnings from u64 type change
Commit fe333321 ("powerpc: Change u64/s64 to a long long integer
type") changed u64 from unsigned long to unsigned long long, which
means that printk formats for printing u64 values should use "ll"
instead of "l" to avoid warnings.  Fix all the places affected by this
in ehca.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2009-01-16 14:55:28 -08:00
Stefan Roscher 6f7bc01a73 IB/ehca: In case of lost interrupts, trigger EOI to reenable interrupts
During corner case testing, we noticed that some versions of ehca do
not properly transition to interrupt done in special load situations.
This can be resolved by periodically triggering EOI through H_EOI, if
EQEs are pending.

Signed-off-by: Stefan Roscher <stefan.roscher@de.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-07-14 23:48:47 -07:00
Joachim Fenkes 4da27d6d5b IB/ehca: Move high-volume debug output to higher debug levels
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-23 11:55:45 -07:00
Joachim Fenkes 3d758a4a48 IB/ehca: Fix lock flag variable location, bump version number
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-12-13 09:37:23 -08:00
Joachim Fenkes 4faf775795 IB/ehca: Serialize HCA-related hCalls if necessary
Several pSeries firmware versions share a rare locking issue in the
HCA-related hCalls. Check for a feature flag that indicates the issue
being fixed and serialize all HCA hCalls if not.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-12-12 14:09:43 -08:00
Joachim Fenkes 0b5de96858 IB/ehca: Serialize MR alloc and MR free hvCalls
Some firmware levels exhibit a race condition between H_ALLOC_RESOURCE(MR)
and H_FREE_RESOURCE(MR).  Work around this problem by locking these hvCalls
against each other.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:11 -07:00
Joachim Fenkes e37221928b IB/ehca: Print return codes as signed decimal integers
...because -12 is easier to read than FFFFFFF4.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:10 -07:00
Joachim Fenkes 2863ad4bdd IB/ehca: Refactor hvcall tracing
Change hvcall trace output towards better readability: reg numbers
instead of argument numbers, return code as signed decimal instead of
unsigned hex.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-10-09 19:59:10 -07:00
Hoang-Nam Nguyen 1655fc2e12 IB/ehca: Move extern declarations from .c files to .h files
Make sure declarations stay in sync with definitions by keeping all 
extern declarations in common .h files.

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-28 21:47:53 -07:00
Stefan Roscher e2f81daf23 IB/ehca: Support small QP queues
eHCA2 supports QP queues that can be as small as 512 bytes. This
greatly reduces memory overhead for consumers that use lots of QPs
with small queues (e.g. RDMA-only QPs). Apart from dealing with
firmware, this code needs to manage bite-sized chunks of kernel pages,
making sure that no kernel page is shared between different protection
domains.

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
2007-07-20 21:19:47 -07:00
Hoang-Nam Nguyen 5bb7d9290c IB/ehca: Support large page MRs
Add support for MR pages larger than 4K on eHCA2. This reduces
firmware memory consumption.  If enabled via the mr_largepage module
parameter, the MR page size will be determined based on the MR length
and the hardware capabilities -- if the MR is >= 16M, 16M pages are
used, for example.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-20 21:19:43 -07:00
Hoang-Nam Nguyen 2b94397adc IB/ehca: Fix warnings issued by checkpatch.pl
Run the existing ehca code through checkpatch.pl and clean up the
worst of the coding style violations.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-17 18:37:40 -07:00
Joachim Fenkes 9844b71baa IB/ehca: Lock renaming, static initializers
- Rename all spinlock flags to "flags", matching the vast majority of kernel
  code.
- Move hcall_lock into the only file it's used in.
- Replaced spin_lock_init() and friends with static initializers for
  global variables.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 20:12:27 -07:00
Joachim Fenkes a6a12947fb IB/ehca: add Shared Receive Queue support
Support SRQs on eHCA2. Since an SRQ is a QP for eHCA2, a lot of code
(structures, create, destroy, post_recv) can be shared between QP and SRQ.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 20:12:27 -07:00
Joachim Fenkes 9a79fc0a1b IB/ehca: QP code restructuring in preparation for SRQ
- Replace init_qp_queues() by a shorter init_qp_queue(), eliminating
  duplicate code.

- hipz_h_alloc_resource_qp() doesn't need a pointer to struct ehca_qp any
  longer. All input and output data is transferred through the parms
  parameter.

- Change the interface to also support SRQ.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 20:12:27 -07:00
Stefan Roscher 65a2c841d6 IB/ehca: Fix number of send WRs reported for new QP
Due to a typo, the driver was reporting the wrong number of "actual send
WRs" after ehca_create_qp().

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-05-24 14:02:39 -07:00
Stefan Roscher 5d88278e3b IB/ehca: Serialize hypervisor calls in ehca_register_mr()
Some pSeries hypervisor versions show a race condition in the allocate
MR hCall.  Serialize this call per adapter to circumvent this problem.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-05-14 13:38:11 -07:00
Joachim Fenkes c4ed790dfd IB/ehca: Implement modify_port
Add "Modify Port" verb support to eHCA driver.  The IB communication
manager needs this to set the IsCM port capability bit when
initializing.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-04-24 21:30:38 -07:00
Heiko J Schick fab97220c9 IB/ehca: Add driver for IBM eHCA InfiniBand adapters
Add a driver for IBM GX bus InfiniBand adapters, which are usable with
some pSeries/System p systems.

Signed-off-by: Heiko J Schick <schickhj.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-22 15:22:22 -07:00