Prepare for removal of ib_device.dma_device.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Move the ib_device.dev.parent initialization code from
ib_device_register_sysfs() to ib_register_device(). Additionally,
allow HBA drivers to set ib_device.dev.parent without setting
ib_device.dma_device. This is the first step towards removing
ib_device.dma_device.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

The qib DMA mapping code is no longer built since commit eb636ac0
("IB/qib: Remove dma.c and use rdmavt version of dma functions"). Hence
remove it.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Mike Marciniszyn <mike.marciniszyn@intel.com>
Cc: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

The hfi1 DMA mapping code has never been built in any upstream kernel.
Hence remove it.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Dennis Dalessandro <dennis.dalessandro@intel.com>
Cc: Dean Luick <dean.luick@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Some but not all architectures provide set_dma_ops(). Move dma_ops
from struct dev_archdata into struct device such that it becomes
possible on all architectures to configure dma_ops per device.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: x86@kernel.org
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This patch
has been generated as follows:

git grep -l 'struct dma_map_ops' |
  xargs -d\\n sed -i \
    -e 's/struct dma_map_ops/const struct dma_map_ops/g' \
    -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \
    -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \
    -e 's/const const struct dma_map_ops /const struct dma_map_ops /g';
sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops intel_dma_ops');
sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc);
sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \
       -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \
       -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \
    drivers/pci/host/*.c
sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c
sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c
sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: x86@kernel.org
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Signed-off-by: NJack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: NMichael Wang <yun.wang@profitbricks.com>
Acked-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

When we try to resolve a dest addr, if we don't give src addr,
cma core will try to resolve to our source ib device automatically.
The current logic only checks if a given port has the same
subnet_prefix as our dest, which is not enough if we use default
well known subnet_prefix on our active port, as it will be the same
as the subnet_prefix on inactive ports and we might match against
an inactive port by accident.  To resolve this, we should also check
if port is active before we resolve it as a suitable src address for
a given dest.
Signed-off-by: NJack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: NMichael Wang <yun.wang@profitbricks.com>
Acked-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Export function for rdma_cm, patch for rdma_cm to follow.
Signed-off-by: NJack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: NMichael Wang <yun.wang@profitbricks.com>
Acked-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

We need a port state cache in ib_core, later we will use in rdma_cm.
Signed-off-by: NJack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: NMichael Wang <yun.wang@profitbricks.com>
Acked-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Since ipoib_cm_tx_start function and ipoib_cm_tx_reap function
belong to different work queues, they can run in parallel.
In this case if ipoib_cm_tx_reap calls list_del and release the
lock, ipoib_cm_tx_start may acquire it and call list_del_init
on the already deleted object.
Changing list_del to list_del_init in ipoib_cm_tx_reap fixes the problem.

Fixes: 839fcaba ("IPoIB: Connected mode experimental support")
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Reviewed-by: NAlex Vesker <valex@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

In order to resolve a situation where a few process delete
the same list element in sequence and cause panic, list_del
is replaced with list_del_init. In this case if the first
process that calls list_del releases the lock before acquiring
it again, other processes who can acquire the lock will call
list_del_init.

Fixes: b63b70d8 ("IPoIB: Use a private hash table for path lookup")
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Reviewed-by: NAlex Vesker <valex@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

If a receive request has not been posted to the work queue, the incoming
message is rejected and the peer will receive a receiver-not-ready (RNR)
error. In IPoIB, IB_WC_RNR_RETRY_EXC_ERR error is part of the life cycle
therefore ipoib_cm_handle_tx_wc function will print to debug instead
of warnings.
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Add a detailed return code to dev_queue_xmit function when
calling to requeue packet via __skb_dequeue.
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

The ipoib_vlan_add function calls rtnl_unlock after free_netdev,
rtnl_unlock not only releases the lock, but also calls netdev_run_todo.
The latter function browses the net_todo_list array and completes the
unregistration of all its net_device instances. If we call free_netdev
before rtnl_unlock, then netdev_run_todo call over the freed device causes
panic.
To fix, move rtnl_unlock call before free_netdev call.

Fixes: 9baa0b03 ("IB/ipoib: Add rtnl_link_ops support")
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

When calling set_mode from sys/fs, the call flow locks the sys/fs lock
first and then tries to lock rtnl_lock (when calling ipoib_set_mod).
On the other hand, the rmmod call flow takes the rtnl_lock first
(when calling unregister_netdev) and then tries to take the sys/fs
lock. Deadlock a->b, b->a.

The problem starts when ipoib_set_mod frees it's rtnl_lck and tries
to get it after that.

    set_mod:
    [<ffffffff8104f2bd>] ? check_preempt_curr+0x6d/0x90
    [<ffffffff814fee8e>] __mutex_lock_slowpath+0x13e/0x180
    [<ffffffff81448655>] ? __rtnl_unlock+0x15/0x20
    [<ffffffff814fed2b>] mutex_lock+0x2b/0x50
    [<ffffffff81448675>] rtnl_lock+0x15/0x20
    [<ffffffffa02ad807>] ipoib_set_mode+0x97/0x160 [ib_ipoib]
    [<ffffffffa02b5f5b>] set_mode+0x3b/0x80 [ib_ipoib]
    [<ffffffff8134b840>] dev_attr_store+0x20/0x30
    [<ffffffff811f0fe5>] sysfs_write_file+0xe5/0x170
    [<ffffffff8117b068>] vfs_write+0xb8/0x1a0
    [<ffffffff8117ba81>] sys_write+0x51/0x90
    [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b

    rmmod:
    [<ffffffff81279ffc>] ? put_dec+0x10c/0x110
    [<ffffffff8127a2ee>] ? number+0x2ee/0x320
    [<ffffffff814fe6a5>] schedule_timeout+0x215/0x2e0
    [<ffffffff8127cc04>] ? vsnprintf+0x484/0x5f0
    [<ffffffff8127b550>] ? string+0x40/0x100
    [<ffffffff814fe323>] wait_for_common+0x123/0x180
    [<ffffffff81060250>] ? default_wake_function+0x0/0x20
    [<ffffffff8119661e>] ? ifind_fast+0x5e/0xb0
    [<ffffffff814fe43d>] wait_for_completion+0x1d/0x20
    [<ffffffff811f2e68>] sysfs_addrm_finish+0x228/0x270
    [<ffffffff811f2fb3>] sysfs_remove_dir+0xa3/0xf0
    [<ffffffff81273f66>] kobject_del+0x16/0x40
    [<ffffffff8134cd14>] device_del+0x184/0x1e0
    [<ffffffff8144e59b>] netdev_unregister_kobject+0xab/0xc0
    [<ffffffff8143c05e>] rollback_registered+0xae/0x130
    [<ffffffff8143c102>] unregister_netdevice+0x22/0x70
    [<ffffffff8143c16e>] unregister_netdev+0x1e/0x30
    [<ffffffffa02a91b0>] ipoib_remove_one+0xe0/0x120 [ib_ipoib]
    [<ffffffffa01ed95f>] ib_unregister_device+0x4f/0x100 [ib_core]
    [<ffffffffa021f5e1>] mlx4_ib_remove+0x41/0x180 [mlx4_ib]
    [<ffffffffa01ab771>] mlx4_remove_device+0x71/0x90 [mlx4_core]

Fixes: 862096a8 ("IB/ipoib: Add more rtnl_link_ops callbacks")
Cc: <stable@vger.kernel.org> # v3.6+
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

This patch fixes Deadlock while executing ipoib_vlan_delete.

The function takes the vlan_rwsem semaphore and calls
unregister_netdevice. The later function calls
ipoib_mcast_stop_thread that cause workqueue flush.

When the queue has one of the ipoib_ib_dev_flush_xxx events,
a deadlock occur because these events also tries to catch the
same vlan_rwsem semaphore.

To fix, unregister_netdevice should be called after releasing
the semaphore.

Fixes: cbbe1efa ("IPoIB: Fix deadlock between ipoib_open() and child interface create")
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Reviewed-by: NAlex Vesker <valex@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

When changing the connection mode, the ipoib_set_mode function
did not check if the previous connection mode equals to the
new one. This commit adds the required check and return 0 if the new
mode equals to the previous one.

Fixes: 839fcaba ("IPoIB: Connected mode experimental support")
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NErez Shitrit <erezsh@mellanox.com>
Reviewed-by: NAlex Vesker <valex@mellanox.com>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

In datagram mode, the IB UD (Unreliable Datagram) transport is used
so the MTU of the interface is equal to the IB L2 MTU minus the
IPoIB encapsulation header. Any request to change the MTU value
above the maximum range will change the MTU to the max allowed, but
will not show any warning message. An ipoib_warn is issued in such
cases, letting the user know that even though the value is legal,
it can't be currently applied.
Signed-off-by: NFeras Daoud <ferasda@mellanox.com>
Signed-off-by: NNoa Osherovich <noaos@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Replace BUG() with BUG_ON() using coccinelle
Signed-off-by: NShyam Saini <mayhs11saini@gmail.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Elsewhere the sin_family field holds a value with a name of the form
AF_..., so it seems reasonable to do so here as well.  Also the values
of PF_INET and AF_INET are the same.

The semantic patch that makes this change is as follows:

//</smpl>
@@
struct sockaddr_in sip;
@@

(
sip.sin_family ==
- PF_INET
+ AF_INET
|
sip.sin_family !=
- PF_INET
+ AF_INET
|
sip.sin_family =
- PF_INET
+ AF_INET
)
//</smpl>
Signed-off-by: NShyam Saini <mayhs11saini@gmail.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Simplify function and sub-function flow of QP creation and destruction.
This also serves as a preparation for SRQ and iWARP support.
Signed-off-by: NRam Amrani <Ram.Amrani@cavium.com>
Reviewed-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

To make the code clearer, use rb_entry() instead of container_of() to
deal with rbtree.
Signed-off-by: NGeliang Tang <geliangtang@gmail.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Acked-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

In AER recovery, pci_error_handlers.link_reset() is never called,
drop it now.
Signed-off-by: NCao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

In AER recovery, pci_error_handlers.link_reset() is never called,
drop it now.
Signed-off-by: NCao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Prepare to mark sensitive kernel structures for randomization by making
sure they're using designated initializers. These were identified during
allyesconfig builds of x86, arm, and arm64, with most initializer fixes
extracted from grsecurity.
Signed-off-by: NKees Cook <keescook@chromium.org>
Acked-by: NShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Prepare to mark sensitive kernel structures for randomization by making
sure they're using designated initializers. These were identified during
allyesconfig builds of x86, arm, and arm64, with most initializer fixes
extracted from grsecurity.
Signed-off-by: NKees Cook <keescook@chromium.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Additionally, make it easier to detect skb leaks by issuing a warning
if a leak occurs.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Cc: Andrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Neither rxe->ifc_ops nor any of the function pointers in struct
struct rxe_ifc_ops ever change. Hence remove the rxe->ifc_ops
indirection mechanism.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Avoid that calling check_rkey() for mem->state == RXE_MEM_STATE_FREE
triggers an MR reference leak.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Change do_complete() such that an error completion is not only
generated if a QP is in the error state but also if a work request
failed.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

This change makes the code easier to read and avoids that code is
duplicated.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Since index values equal to or above 'range' can trigger memory
corruption, complain if index >= range.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

It is strongly recommended to report kernel warnings once instead
of every time a condition is hit. Hence change WARN_ON() into
WARN_ON_ONCE() / BUILD_BUG_ON() as appropriate.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Change the argument type of these functions from void * into
struct rxe_pool_entry *.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Let the compiler check the type of the arguments passed to SKB_TO_PKT()
and PKT_TO_SKB().
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Casting a pointer to 'void *' explicitly is not necessary in C code.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

The variable 'av' is not used so remove it. Since that change
removes the last user of the 'wqe' argument, remove that argument
too.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Andrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: NAndrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>