IB/mthca: Stop returning separate error and status from FW commands

Instead of having firmware command functions return an error and also
a status, leading to code like:

err = mthca_FW_COMMAND(..., &status);
if (err)
goto out;
if (status) {
err = -E...;
goto out;
}

all over the place, just handle the FW status inside the FW command
handling code (the way mlx4 does it), so we can simply write:

err = mthca_FW_COMMAND(...);
if (err)
goto out;

In addition to simplifying the source code, this also saves a healthy
chunk of text:

add/remove: 0/0 grow/shrink: 10/88 up/down: 510/-3357 (-2847)
function old new delta
static.trans_table 324 584 +260
mthca_cmd_poll 352 477 +125
mthca_cmd_wait 511 567 +56
mthca_table_put 213 240 +27
mthca_cleanup_db_tab 372 387 +15
__mthca_remove_one 314 323 +9
mthca_cleanup_user_db_tab 275 283 +8
__mthca_init_one 1738 1746 +8
mthca_cleanup 20 21 +1
mthca_MAD_IFC 1081 1082 +1
mthca_MGID_HASH 43 40 -3
mthca_MAP_ICM_AUX 23 20 -3
mthca_MAP_ICM 19 16 -3
mthca_MAP_FA 23 20 -3
mthca_READ_MGM 43 38 -5
mthca_QUERY_SRQ 43 38 -5
mthca_QUERY_QP 59 54 -5
mthca_HW2SW_SRQ 43 38 -5
mthca_HW2SW_MPT 60 55 -5
mthca_HW2SW_EQ 43 38 -5
mthca_HW2SW_CQ 43 38 -5
mthca_free_icm_table 120 114 -6
mthca_query_srq 214 206 -8
mthca_free_qp 662 654 -8
mthca_cmd 38 28 -10
mthca_alloc_db 1321 1311 -10
mthca_setup_hca 1067 1055 -12
mthca_WRITE_MTT 35 22 -13
mthca_WRITE_MGM 40 27 -13
mthca_UNMAP_ICM_AUX 36 23 -13
mthca_UNMAP_FA 36 23 -13
mthca_SYS_DIS 36 23 -13
mthca_SYNC_TPT 36 23 -13
mthca_SW2HW_SRQ 35 22 -13
mthca_SW2HW_MPT 35 22 -13
mthca_SW2HW_EQ 35 22 -13
mthca_SW2HW_CQ 35 22 -13
mthca_RUN_FW 36 23 -13
mthca_DISABLE_LAM 36 23 -13
mthca_CLOSE_IB 36 23 -13
mthca_CLOSE_HCA 38 25 -13
mthca_ARM_SRQ 39 26 -13
mthca_free_icms 178 164 -14
mthca_QUERY_DDR 389 375 -14
mthca_resize_cq 1063 1048 -15
mthca_unmap_eq_icm 123 107 -16
mthca_map_eq_icm 396 380 -16
mthca_cmd_box 90 74 -16
mthca_SET_IB 433 417 -16
mthca_RESIZE_CQ 369 353 -16
mthca_MAP_ICM_page 240 224 -16
mthca_MAP_EQ 183 167 -16
mthca_INIT_IB 473 457 -16
mthca_INIT_HCA 745 729 -16
mthca_map_user_db 816 798 -18
mthca_SYS_EN 157 139 -18
mthca_cleanup_qp_table 78 59 -19
mthca_cleanup_eq_table 168 149 -19
mthca_UNMAP_ICM 143 121 -22
mthca_modify_srq 172 149 -23
mthca_unmap_fmr 198 174 -24
mthca_query_qp 814 790 -24
mthca_query_pkey 343 319 -24
mthca_SET_ICM_SIZE 34 10 -24
mthca_QUERY_DEV_LIM 1870 1846 -24
mthca_map_cmd 1130 1105 -25
mthca_ENABLE_LAM 401 375 -26
mthca_modify_port 247 220 -27
mthca_query_device 884 850 -34
mthca_NOP 75 41 -34
mthca_table_get 287 249 -38
mthca_init_qp_table 333 293 -40
mthca_MODIFY_QP 348 308 -40
mthca_close_hca 131 89 -42
mthca_free_eq 435 390 -45
mthca_query_port 755 705 -50
mthca_free_cq 581 528 -53
mthca_alloc_icm_table 578 524 -54
mthca_multicast_attach 1041 986 -55
mthca_init_hca 326 271 -55
mthca_query_gid 487 431 -56
mthca_free_srq 524 468 -56
mthca_free_mr 168 111 -57
mthca_create_eq 1560 1501 -59
mthca_multicast_detach 790 728 -62
mthca_write_mtt 918 854 -64
mthca_register_device 1406 1342 -64
mthca_fmr_alloc 947 883 -64
mthca_mr_alloc 652 582 -70
mthca_process_mad 1242 1164 -78
mthca_dev_lim 910 830 -80
find_mgm 482 400 -82
mthca_modify_qp 3852 3753 -99
mthca_init_cq 1281 1181 -100
mthca_alloc_srq 1719 1610 -109
mthca_init_eq_table 1807 1679 -128
mthca_init_tavor 761 491 -270
mthca_init_arbel 2617 2098 -519

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.

2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).

* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

net: replace %p6 with %pI6

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

infiniband: use %p6 for printing message ids

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

RDMA: Remove subversion $Id tags

They don't get updated by git and so they're worse than useless.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

IB/mthca: Fix section mismatches

Commit b3b30f5e ("IB/mthca: Recover from catastrophic errors")
introduced some section mismatch breakage, because the error recovery
code tears down and reinitializes the device, which calls into lots of
code originally marked __devinit and __devexit from regular .text.

Fix this by getting rid of these now-incorrect section markers.

Reported by Randy Dunlap <randy.dunlap@oracle.com>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

IB/mthca: Fix section mismatch problems

Quite a few cleanup functions in mthca were marked as __devexit.
However, they could also be called from error paths during
initialization, so they cannot be marked that way. Just delete all of
the incorrect annotations.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

IB/mthca: Whitespace cleanups

Remove trailing whitespace and fix indentation that with spaces
instead of tabs.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

IB/mthca: Semaphore to mutex conversions

Convert semaphores to mutexes in mthca. Leave firmware command
interface poll_sem and event_sem as semaphores.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

IB/mthca: Don't cancel commands on a signal

We have run into the following problem: if a task receives a signal
while in the process of e.g. destroying a resource (which could be
because the relevant file was closed) mthca could bail out from trying
to take a command interface semaphore without performing the
appropriate command to tell hardware that the resource is being
destroyed.

As a result we see messages like
ib_mthca 0000:04:00.0: HW2SW_CQ failed (-4)

In this case, hardware could access the resource after the memory has
been freed, possibly causing memory corruption.

A simple solution is to replace down_interruptible() by down() in
command interface activation.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
[ It's also not safe to bail out on multicast table operations, since
they may be invoked on the cleanup path too. So use down() for
mcg_table.sem too. ]
Signed-off-by: Roland Dreier <rolandd@cisco.com>

IB/mthca: multiple fixes for multicast group handling

Multicast group management fixes:
. Fix leak of mailbox memory in error handling on multicast group operations.
. Free AMGM indices at detach and in attach error handling.
. Fix amount to shift for aligning next_gid_index in mailbox: it
starts at bit 6, not bit 5.
. Allocate AMGM index after end of MGM table, in the range num_mgms to
multicast table size - 1. Add some BUG_ON checks to catch cases
where the index falls in the MGM hash area.
. Initialize the list of QPs in a newly-allocated group from AMGM to 0
This is necessary since when a group is moved from AMGM to MGM (in the
case where the MGM entry has been emptied of QPs), the AMGM entry is
not reset to 0 (and we don't want an extra command to do that).

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

[PATCH] fix missing includes

I recently picked up my older work to remove unnecessary #includes of
sched.h, starting from a patch by Dave Jones to not include sched.h
from module.h. This reduces the number of indirect includes of sched.h
by ~300. Another ~400 pointless direct includes can be removed after
this disentangling (patch to follow later).
However, quite a few indirect includes need to be fixed up for this.

In order to feed the patches through -mm with as little disturbance as
possible, I've split out the fixes I accumulated up to now (complete for
i386 and x86_64, more archs to follow later) and post them before the real
patch. This way this large part of the patch is kept simple with only
adding #includes, and all hunks are independent of each other. So if any
hunk rejects or gets in the way of other patches, just drop it. My scripts
will pick it up again in the next round.

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

[IB] mthca: Don't enter QP into MCG more than once.

Avoid entering a QP as member of a multicast group multiple times.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

[IB] mthca: Better limit checking and reporting

Check the sizes of CQs, QPs and SRQs when creating objects, and fail
instead of creating too-big queues. Also return real limits instead
of just plausible-sounding values from mthca_query_device().

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

[PATCH] IB: sparse endianness cleanup

Fix sparse warnings. Use __be* where appropriate.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

[PATCH] IB/mthca: Align FW command mailboxes to 4K

Future versions of Mellanox HCA firmware will require command mailboxes to be
aligned to 4K. Support this by using a pci_pool to allocate all mailboxes.
This has the added benefit of shrinking the source and text of mthca.

Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!