Some variables have been initialized when used. As a result, here removes
some unncessary initial assignment.

Link: https://lore.kernel.org/r/1599547944-30671-1-git-send-email-oulijun@huawei.comSigned-off-by: NLijun Ou <oulijun@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>

There is a spelling mistake in a dev_dbg message. Fix it.

Link: https://lore.kernel.org/r/20200805141111.22804-1-colin.king@canonical.comSigned-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>

If hns ROCEE is set to level-0 addressing, the length of the entire buffer
can be used as the page size. The driver needn't to split the buffer into
small units because all pages are continuous.

Link: https://lore.kernel.org/r/1593525696-12570-1-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>

ibmr.device is assigned after MR is successfully registered, but both
write_mtpt() and frmr_write_mtpt() accesses it during the mr registration
process, which may cause the following error when trying to register MR in
userspace and pbl_hop_num is set to 0.

  pc : hns_roce_mtr_find+0xa0/0x200 [hns_roce]
  lr : set_mtpt_pbl+0x54/0x118 [hns_roce_hw_v2]
  sp : ffff00023e73ba20
  x29: ffff00023e73ba20 x28: ffff00023e73bad8
  x27: 0000000000000000 x26: 0000000000000000
  x25: 0000000000000002 x24: 0000000000000000
  x23: ffff00023e73bad0 x22: 0000000000000000
  x21: ffff0000094d9000 x20: 0000000000000000
  x19: ffff8020a6bdb2c0 x18: 0000000000000000
  x17: 0000000000000000 x16: 0000000000000000
  x15: 0000000000000000 x14: 0000000000000000
  x13: 0140000000000000 x12: 0040000000000041
  x11: ffff000240000000 x10: 0000000000001000
  x9 : 0000000000000000 x8 : ffff802fb7558480
  x7 : ffff802fb7558480 x6 : 000000000003483d
  x5 : ffff00023e73bad0 x4 : 0000000000000002
  x3 : ffff00023e73bad8 x2 : 0000000000000000
  x1 : 0000000000000000 x0 : ffff0000094d9708
  Call trace:
   hns_roce_mtr_find+0xa0/0x200 [hns_roce]
   set_mtpt_pbl+0x54/0x118 [hns_roce_hw_v2]
   hns_roce_v2_write_mtpt+0x14c/0x168 [hns_roce_hw_v2]
   hns_roce_mr_enable+0x6c/0x148 [hns_roce]
   hns_roce_reg_user_mr+0xd8/0x130 [hns_roce]
   ib_uverbs_reg_mr+0x14c/0x2e0 [ib_uverbs]
   ib_uverbs_write+0x27c/0x3e8 [ib_uverbs]
   __vfs_write+0x60/0x190
   vfs_write+0xac/0x1c0
   ksys_write+0x6c/0xd8
   __arm64_sys_write+0x24/0x30
   el0_svc_common+0x78/0x130
   el0_svc_handler+0x38/0x78
   el0_svc+0x8/0xc

Solve above issue by adding a pointer of structure hns_roce_dev as a
parameter of write_mtpt() and frmr_write_mtpt(), so that both of these
functions can access it before finishing MR's registration.

Fixes: 9b2cf76c ("RDMA/hns: Optimize PBL buffer allocation process")
Link: https://lore.kernel.org/r/1592314629-51715-1-git-send-email-liweihang@huawei.comSigned-off-by: NYangyang Li <liyangyang20@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

The pointer raq is being assigned twice. Fix this by removing one of the
redundant assignments.

Fixes: 14ba8730 ("RDMA/hns: Remove redundant type cast for general pointers")
Link: https://lore.kernel.org/r/20200528150427.420624-1-colin.king@canonical.com
Addressses-Coverity: ("Evaluation order violation")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

There is no need to do a type cast on genernal pointers, they could be
assigned to any type of variables. In addition, optimize initialization of
some variables and adjust order of them.

Link: https://lore.kernel.org/r/1590152579-32364-2-git-send-email-liweihang@huawei.comSigned-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

PBL table has its own implementation for multi-hop addressing currently,
but for the hardware, all table's addressing use the same logic, there is
no need to implement repeatedly. So optimize the PBL buffer allocation
process by using the mtr's interfaces.

Link: https://lore.kernel.org/r/1588071823-40200-2-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Reported-by: Nkbuild test robot <lkp@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Use status table to reduce cyclomatic complexity.

Link: https://lore.kernel.org/r/1586938475-37049-7-git-send-email-liweihang@huawei.comSigned-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Add the zero hop addressing support by using mtr interface for CQE buffer,
so the hns driver can support addressing hopnum between 0 to 3 for CQE.

Link: https://lore.kernel.org/r/1586779091-51410-7-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Add the zero hop addressing support by using new mtr interface for WQE
buffer and simple mtr invoking process, so WQE buffer can support hopnum
between 0 to 3.

Link: https://lore.kernel.org/r/1586779091-51410-5-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

When the value of nbufs is 1, the buffer is in direct mode, which may cause
confusion. So optimizes current codes to make it easier to maintain and
understand.

Link: https://lore.kernel.org/r/1586779091-51410-3-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

ceq and aeq is a ring buffer, consumer index of them will be set to zero
after reaching the maximum value. The warning should be removed or it may
mislead the users.

Link: https://lore.kernel.org/r/1584674622-52773-8-git-send-email-liweihang@huawei.comSigned-off-by: NWenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

There are serval global functions related to wqe buffer in the hns driver
and are called in different files. These symbols cannot directly represent
the namespace they belong to. So add prefix 'hns_roce_' to 3 wqe buffer
related global functions: get_recv_wqe(), get_send_wqe(), and
get_send_extend_sge().

Link: https://lore.kernel.org/r/1583839084-31579-2-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Wrap the duplicate code in hip08 and hip06 qp destruction process as
hns_roce_qp_destroy() to simply the qp destroy flow.

Link: https://lore.kernel.org/r/1582526258-13825-2-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Prevent uninitialized fields when new fields are added, and make code look
simpler.

Link: https://lore.kernel.org/r/1582162471-50361-1-git-send-email-liweihang@huawei.comSigned-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

When hardware is in resetting stage, we may can't poll back all the
expected work completions as the hardware won't generate cqe anymore.

This patch allows the driver to compose the expected wc instead of the
hardware during resetting stage. Once the hardware finished resetting, we
can poll cq from hardware again.

Link: https://lore.kernel.org/r/1578572412-25756-1-git-send-email-liweihang@huawei.comSigned-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Currently, the wqe idx is calculated repeatly everywhere it is used.  This
patch defines wqe_idx and calculated it only once, then just use it as
needed.

Fixes: 2d407888 ("RDMA/hns: Add support for processing send wr and receive wr")
Link: https://lore.kernel.org/r/1575981902-5274-1-git-send-email-liweihang@hisilicon.comSigned-off-by: NYixian Liu <liuyixian@huawei.com>
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Current names of functions are not proper, such as hns_roce_free_cq,
actually it means free cqc, thus we rename them. Furthermore, functions
used inside one file can be named without the prefix hns_roce_ which will
make the functions for verbs symbols more eye-catching.

Link: https://lore.kernel.org/r/1574044493-46984-4-git-send-email-liweihang@hisilicon.comSigned-off-by: NYixian Liu <liuyixian@huawei.com>
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

There is no need to package buf and mtt into hns_roce_cq_buf, which will
make code more complex, just delete this struct and move buf and mtt into
hns_roce_cq. Furthermore, we add size member for hns_roce_buf to avoid
repeatly calculating where needed it.

Link: https://lore.kernel.org/r/1574044493-46984-3-git-send-email-liweihang@hisilicon.comSigned-off-by: NYixian Liu <liuyixian@huawei.com>
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Some interfaces defined with unnecessary input parameters, such as "nent"
and "vector". This patch redefined these interfaces to make the code more
readable and simple.

Link: https://lore.kernel.org/r/1574044493-46984-2-git-send-email-liweihang@hisilicon.comSigned-off-by: NYixian Liu <liuyixian@huawei.com>
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Replace "sw2hw" and "hw2sw" which is hard to understand with "create" and
"destroy".

Link: https://lore.kernel.org/r/1572952082-6681-6-git-send-email-liweihang@hisilicon.comSigned-off-by: NYixing Liu <liuyixing1@huawei.com>
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Special QP have no differences with normal qp in data structure, so
definition of struct hns_roce_sqp should be removed and replaced by struct
hns_roce_qp.

Link: https://lore.kernel.org/r/1572952082-6681-3-git-send-email-liweihang@hisilicon.comSigned-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Use devm_platform_ioremap_resource() to simplify the code a bit.  This is
detected by coccinelle.

Link: https://lore.kernel.org/r/20190906141727.26552-1-yuehaibing@huawei.comSigned-off-by: NYueHaibing <yuehaibing@huawei.com>
Reviewed-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Sparse is whining about the u32 and __le32 mixed usage in the driver.
The roce_set_field() is used to __le32 data of hardware only.
If a variable is not delivered to the hardware, the __le32 type and
related operations are not required.
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Link: https://lore.kernel.org/r/1566393276-42555-6-git-send-email-oulijun@huawei.comSigned-off-by: NDoug Ledford <dledford@redhat.com>

Here uses the meaningful macro instead of the magic number
for readability.
Signed-off-by: NLijun Ou <oulijun@huawei.com>
Signed-off-by: NLang Chen <chenglang@huawei.com>
Link: https://lore.kernel.org/r/1566393276-42555-5-git-send-email-oulijun@huawei.comSigned-off-by: NDoug Ledford <dledford@redhat.com>

we change type of some members to u32/u8 from __le32 as well as
split sl_tclass_flowlabel into three variables in hns_roce_av.
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Link: https://lore.kernel.org/r/1566393276-42555-4-git-send-email-oulijun@huawei.comSigned-off-by: NDoug Ledford <dledford@redhat.com>

Fix to return error code -ENOMEM from the rdma_zalloc_drv_obj() error
handling case instead of 0, as done elsewhere in this function.

Fixes: e8ac9389 ("RDMA: Fix allocation failure on pointer pd")
Fixes: 21a428a0 ("RDMA: Handle PD allocations by IB/core")
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190801012725.150493-1-weiyongjun1@huawei.comSigned-off-by: NDoug Ledford <dledford@redhat.com>

We don't need dev_err() messages when platform_get_irq() fails now that
platform_get_irq() prints an error message itself when something goes
wrong. Let's remove these prints with a simple semantic patch.

// <smpl>
@@
expression ret;
struct platform_device *E;
@@

ret =
(
platform_get_irq(E, ...)
|
platform_get_irq_byname(E, ...)
);

if ( \( ret < 0 \| ret <= 0 \) )
{
(
-if (ret != -EPROBE_DEFER)
-{ ...
-dev_err(...);
-... }
|
...
-dev_err(...);
)
...
}
// </smpl>

While we're here, remove braces on if statements that only have one
statement (manually).

Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: linux-rdma@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NStephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20190730181557.90391-21-swboyd@chromium.orgSigned-off-by: NDoug Ledford <dledford@redhat.com>

Add a helper to match the firmware node handle of a device and provide
wrappers for {bus/class/driver}_find_device() APIs to avoid proliferation
of duplicate custom match functions.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: linux-usb@vger.kernel.org
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Joe Perches <joe@perches.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: NSuzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: NRobin Murphy <robin.murphy@arm.com>
Reviewed-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20190723221838.12024-4-suzuki.poulose@arm.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Currently the comparison of end with less than zero is always false
because end is an unsigned long.  Also, replace checks of end with
non-zero with end > 0 as it is possible that the #defined decrement may be
changed in the future causing end to step over zero and go negative.

The initialization of end with 0 is also redundant as this value is never
read and is later set to HW_SYNC_TIMEOUT_MSECS, so fix this by
initializing it with this value to begin with.

Link: https://lore.kernel.org/r/20190531092101.28772-1-colin.king@canonical.com
Addresses-Coverity: ("Unsigned compared against 0")
Fixes: 669cefb6 ("RDMA/hns: Remove jiffies operation in disable interrupt context")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

The format specifier \"%p\" can leak kernel addresses.  Use \"%pK\"
instead.
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Hip06 reserve 12 qps, Hip08 reserve 8 qps. When the QP is released, the
chip model is not judged, and the Hip08 cannot release the qpn 8~12
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NLijun Ou <oulijun@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

In commit af7ddd8a ("Merge tag 'dma-mapping-4.21' of
git://git.infradead.org/users/hch/dma-mapping"),
dma_alloc_coherent/dmam_alloc_coherent always zeroed the returned memory.
So the memset after a coherent allocation function is not needed.
Signed-off-by: NFuqian Huang <huangfq.daxian@gmail.com>
Reviewed-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

There is an arbitrary difference between the prototypes of
bus_find_device() and class_find_device() preventing their callers
from passing the same pair of data and match() arguments to both of
them, which is the const qualifier used in the prototype of
class_find_device().  If that qualifier is also used in the
bus_find_device() prototype, it will be possible to pass the same
match() callback function to both bus_find_device() and
class_find_device(), which will allow some optimizations to be made in
order to avoid code duplication going forward.  Also with that, constify
the "data" parameter as it is passed as a const to the match function.

For this reason, change the prototype of bus_find_device() to match
the prototype of class_find_device() and adjust its callers to use the
const qualifier in accordance with the new prototype of it.

Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Kershner <david.kershner@unisys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Airlie <airlied@linux.ie>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Sebastian Ott <sebott@linux.ibm.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: rafael@kernel.org
Acked-by: NCorey Minyard <minyard@acm.org>
Acked-by: NDavid Kershner <david.kershner@unisys.com>
Acked-by: NMark Brown <broonie@kernel.org>
Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for the I2C parts
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The "end" variable is declared as unsigned and can't be negative, it
leads to the situation where timeout limit is not honored, so let's
convert logic to ensure that loop is bounded.

drivers/infiniband/hw/hns/hns_roce_hw_v1.c: In function _hns_roce_v1_clear_hem_:
drivers/infiniband/hw/hns/hns_roce_hw_v1.c:2471:12: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
 2471 |    if (end < 0) {
      |            ^

Fixes: 669cefb6 ("RDMA/hns: Remove jiffies operation in disable interrupt context")
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Update ib_umem_release() to behave similarly to kfree() and allow
submitting NULL pointer as safe input to this function.

Fixes: a52c8e24 ("RDMA: Clean destroy CQ in drivers do not return errors")
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Ensure that CQ is allocated and freed by IB/core and not by drivers.
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Acked-by: NGal Pressman <galpress@amazon.com>
Reviewed-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Tested-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Like all other destroy commands, .destroy_cq() call is not supposed
to fail. In all flows, the attempt to return earlier caused to memory
leaks.

This patch converts .destroy_cq() to do not return any errors.
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Acked-by: NGal Pressman <galpress@amazon.com>
Acked-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

This patch makes the code more readable by removing magic numbers.
Signed-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NLijun Ou <oulijun@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

In some functions, the jiffies operation is unnecessary, and we can
control delay using mdelay and udelay functions only.  Especially, in
hns_roce_v1_clear_hem, the function calls spin_lock_irqsave, the context
disables interrupt, so we can not use jiffies and msleep functions.
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>