Initiating final cleanup after an ungraceful driver unload can lead to bad
PCI accesses towards the host.
This patch revises the load sequence so final cleanup is sent while the
internal master enable is cleared, to prevent the host accesses, and clears
the internal error indications just before enabling the internal master
enable.
Signed-off-by: NTomer Tayar <tomer.tayar@cavium.com>
Signed-off-by: NAriel Elior <ariel.elior@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is new code and not bug fixes.

This reverts all changes added by merge commit
8fb18be9Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

This patch fixes the following warning:

drivers/net/ethernet/qlogic/qed/qed_cxt.c:2126:4: warning: this statement may fall through [-Wimplicit-fallthrough=]

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling
-Wimplicit-fallthrough.
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds the error recovery process in the qede driver.
The process includes a partial/customized driver unload and load, which
allows it to look like a short suspend period to the kernel while
preserving the net devices' state.
Signed-off-by: NTomer Tayar <tomer.tayar@cavium.com>
Signed-off-by: NAriel Elior <ariel.elior@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds the detection and handling of a parity error ("process kill
event"), including the update of the protocol drivers, and the prevention
of any HW access that will lead to device access towards the host while
recovery is in progress.
It also provides the means for the protocol drivers to trigger a recovery
process on their decision.
Signed-off-by: NTomer Tayar <tomer.tayar@cavium.com>
Signed-off-by: NAriel Elior <ariel.elior@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Initiating final cleanup after an ungraceful driver unload can lead to bad
PCI accesses towards the host.
This patch revises the load sequence so final cleanup is sent while the
internal master enable is cleared, to prevent the host accesses, and clears
the internal error indications just before enabling the internal master
enable.
Signed-off-by: NTomer Tayar <tomer.tayar@cavium.com>
Signed-off-by: NAriel Elior <ariel.elior@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Drivers may not be able to support certain FDB entries, and an error
code is insufficient to give clear hints as to the reasons of rejection.

In order to make it possible to communicate the rejection reason, extend
ndo_fdb_add() with an extack argument. Adapt the existing
implementations of ndo_fdb_add() to take the parameter (and ignore it).
Pass the extack parameter when invoking ndo_fdb_add() from rtnl_fdb_add().
Signed-off-by: NPetr Machata <petrm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.

This change was generated with the following Coccinelle SmPL patch:

@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@

-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)
Suggested-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NLuis Chamberlain <mcgrof@kernel.org>
[hch: re-ran the script on the latest tree]
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Make sure chain element is updated before ringing the doorbell.
Signed-off-by: NDenis Bolotin <dbolotin@marvell.com>
Signed-off-by: NAriel Elior <aelior@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When netxen_rom_fast_read() fails, "bios" is left uninitialized and may
contain random value, thus should not be used.

The fix ensures that if netxen_rom_fast_read() fails, we return "-EIO".
Signed-off-by: NKangjie Lu <kjlu@umn.edu>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c:1070:5: warning:
 variable 'op' set but not used [-Wunused-but-set-variable]
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c:1342:5: warning:
 variable 'cmd_op' set but not used [-Wunused-but-set-variable]

'op' never used since introduction in commit 7cb03b23 ("qlcnic:
Support VF-PF communication channel commands.")
'cmd_op' not used since commit 6226204b ("qlcnic: Fix operation
type and command type.")
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We accidentally deleted the code to set "rc = -ENOMEM;" and this patch
adds it back.

Fixes: d2201a21 ("qed: No need for LL2 frags indication")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The value for OEM_CFG_UPDATE command differs between driver and the
Management firmware (mfw). Fix this gap with adding a reserved field.

Fixes: cac6f691 ("qed: Add support for Unified Fabric Port.")
Signed-off-by: NSudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: NAriel Elior <ariel.elior@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is a spelling mistake in a DP_NOTICE message, fix it.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

All L2 queues funnel through this flow, so this would cover the
regular RSS queues, as well queues created for VFs, mqos queues,
xdp queues, etc.
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NTomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Most of the doorbelling entities are outside of the core module.
L2 queues, Roce queues, iscsi and fcoe all need to register.
Make the APIs available for these drivers.
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NTomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Light L2 queues are doorbelling entities. Modify the implementation
to keep the doorbell data necessary for doorbelling in well known
location instead of recomputing every time. Register the LL2 queue
with doorbell recovery mechanism.
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NTomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Slow path queue is a doorbelling entity. Register it with the overflow mechanism.
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NTomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In case of an attention from the doorbell queue block, analyze the HW
indications. In case of a doorbell overflow, execute a doorbell recovery.
Since there can be spurious indications (race conditions between multiple PFs),
schedule a periodic task for checking whether a doorbell overflow may have been
missed. After a set time with no indications, terminate the periodic task.
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NTomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add the database used to register doorbelling entities, and APIs for adding
and deleting entries, and logic for traversing the database and doorbelling
once on behalf of all entities.
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NTomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

skb_linearization can fail due to memory allocation failure.
In such a case, the driver will drop the packet. In such a case
The driver used to print an error message.
This patch replaces this error message by a dedicated statistic.
Signed-off-by: NMichael Shteinbok <michael.shteinbok@cavium.com>
Signed-off-by: NAriel Elior <ariel.elior@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c:4011:5:
 warning: variable 'max_hw_rings' set but not used [-Wunused-but-set-variable]
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c:4013:6:
 warning: variable 'cur_rings' set but not used [-Wunused-but-set-variable]
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c:2996:25:
 warning: variable 'tx_desc_info' set but not used [-Wunused-but-set-variable]

'cur_rings, max_hw_rings' never used since introduction in commit
34e8c406 ("qlcnic: refactor Tx/SDS ring calculation and validation in driver.")
'tx_desc_info' never used since commit
95b3890a ("qlcnic: Enhance Tx timeout debugging.")
Also 'queue_type' only can be QLCNIC_RX_QUEUE/QLCNIC_TX_QUEUE,
so make a trival cleanup on if statement.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Acked-by: NShahed Shaikh <shahed.shaikh@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The text in array s_igu_fifo_error_strs contains a spelling mistake,
fix it.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The patch adds driver support for MBI image update through MFW.
Signed-off-by: NSudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In the case of internal reload (e.g., mtu change), there could be a race
between link-up notification from mfw and the driver unload processing. In
such case kernel assumes the link is up and starts using the queues which
leads to the server crash.

Send link notification to the kernel only when driver has already requested
MFW for the link.
Signed-off-by: NSudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The values represented by qede->flags is being used in mixed ways:
  1. As 'value' at some places e.g., QEDE_FLAGS_IS_VF usage
  2. As bit-mask(value) at some places e.g., QEDE_FLAGS_PTP_TX_IN_PRORGESS
     usage.
This implementation pose problems in future when we want to add more flag
values e.g., overlap of the values, overflow of 64-bit storage.

Updated the implementation to go with approach (2) for qede->flags.
Signed-off-by: NSudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MFW sends UFP notifications mostly during the device init phase and PFs
might not be assigned with a name by this time. Hence capturing port-id in
the debug messages would help in finding which PF the ufp notification was
sent to.

Also, fixed a minor scemantic issue in a debug print.
Signed-off-by: NSudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: NAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: NMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The getter callers doesn't know the valid Physical Queues (PQ) values.
This patch makes sure that a valid PQ will always be returned.

The patch consists of 3 fixes:

 - When qed_init_qm_get_idx_from_flags() receives a disabled flag, it
   returned PQ 0, which can potentially be another function's pq. Verify
   that flag is enabled, otherwise return default start_pq.

 - When qed_init_qm_get_idx_from_flags() receives an unknown flag, it
   returned NULL and could lead to a segmentation fault. Return default
   start_pq instead.

 - A modulo operation was added to MCOS/VFS PQ getters to make sure the
   PQ returned is in range of the required flag.

Fixes: b5a9ee7c ("qed: Revise QM cofiguration")
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix the condition which verifies that only one flag is set. The API
bitmap_weight() should receive size in bits instead of bytes.

Fixes: b5a9ee7c ("qed: Revise QM cofiguration")
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add missing semicolon.

Fixes: 291d57f6 ("qed: Fix rdma_info structure allocation")
Cc: Michal Kalderon <michal.kalderon@cavium.com>
Cc: Denis Bolotin <denis.bolotin@cavium.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The value of "sb_index" is written by the hardware. Reading its value and
writing it to "index" must finish before checking the loop condition.
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Certain flows need to access the rdma-info structure, for example dcbx
update flows. In some cases there can be a race between the allocation or
deallocation of the structure which was done in roce start / roce stop and
an asynchrounous dcbx event that tries to access the structure.
For this reason, we move the allocation of the rdma_info structure to be
similar to the iscsi/fcoe info structures which are allocated during device
setup.
We add a new field of "active" to the struct to define whether roce has
already been started or not, and this is checked instead of whether the
pointer to the info structure.

Fixes: 51ff1725 ("qed: Add support for RoCE hw init")
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The TC received from APP TLV is stored in offload_tc, and should not be
set by protocols which did not receive an APP TLV. Fixed the condition
when overriding the offload_tc.
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Release PTT before entering error flow.
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A stuck ramrod should be deleted from the completion_pending list,
otherwise it will be added again in the future and corrupt the list.

Return error value to inform that ramrod is stuck and should be deleted.
Signed-off-by: NSagiv Ozeri <sagiv.ozeri@cavium.com>
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

qed_sp_destroy_request() API was added for SPQ users that need to
free/return the entry they acquired in their error flows.
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When there are no SPQ entries left in the free_pool, new entries are
allocated and are added to the unlimited list. When an entry in the pool
is available, the content is copied from the original entry, and the new
entry is sent to the device. qed_spq_post() is not aware of that, so the
additional entry is stored in the original entry as p_post_ent, which can
later be returned to the pool.
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Free the allocated SPQ entry or return the acquired SPQ entry to the free
list in error flows.
Signed-off-by: NDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: NMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

VLAN.TCI == 0 is perfectly valid (802.1p), so allow it to be accelerated.
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

gcc-8 notices that qed_mcp_get_transceiver_data() may fail to
return a result to the caller:

drivers/net/ethernet/qlogic/qed/qed_mcp.c: In function 'qed_mcp_trans_speed_mask':
drivers/net/ethernet/qlogic/qed/qed_mcp.c:1955:2: error: 'transceiver_type' may be used uninitialized in this function [-Werror=maybe-uninitialized]

When an error is returned by qed_mcp_get_transceiver_data(), we
should propagate that to the caller of qed_mcp_trans_speed_mask()
rather than continuing with uninitialized data.

Fixes: c56a8be7 ("qed: Add supported link and advertise link to display in ethtool.")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>