This patch provide call back functions to stop the chip and resume the chip
if the PCI lower level driver wants to perform function level reset/FLR.
Before the FLR, the chip will be stopped to turn off all DMA activity.
After the FLR, the chip is reset to resume previous operation state.
Signed-off-by: Quinn Tran <qtran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch fixes the issue where Dell-EMC Target will fail to discover LUNs
if domain and area of port ID is not same as adapter's.
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Unused now, and another field in struct request bites the dust.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

No users left.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

No more need in a blk-mq world where the scsi command and request are
allocated together.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

No real need for bidi support once the OSD code is gone.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Now that all the users are gone the SCSI OSD library can be removed as
well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This was an example for using the SCSI OSD protocol, which we're trying
to remove.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

We can just stash away the second request in struct bsg_job instead of
using the block layer req->next_rq field, allowing for the eventual removal
of the latter.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Move all actual functionality into helpers, just leaving the dispatch in
this function.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Tested-by: Benjamin Block <bblock@linux.ibm.com>
Tested-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Updated driver version to 27.102.00.00 from 27.101.00.00.
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Add Atlas PCIe Switch Management Port device PNPID,
Vendor Id: 0x1000
device Id: 0x00B2

This device is based on MPI 2.6 spec and it exposes one SES device to
accept management commands for the PCIe switch.
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Added device ID for NVMe Switch Adapter (Ambrosia).
VID: 0x1000
DID: 0x02B1
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

MPI Endpoint is a PCIe switch based on MPI2.

Renaming device ID macro from MPI2_MFGPAGE_DEVID_SAS2308_MPI_EP to
MPI2_MFGPAGE_DEVID_SWITCH_MPI_EP.
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch adds support for the new DEVICE_LIST DCMD.

Driver currently sends two separate DCMDs for getting the list of PDs and
LDs that are exposed to host.  The new DCMD provides a single interface to
get a list of both PDs and LDs that are exposed to the host.  Based on the
list of target IDs that are returned by this DCMD, driver will add the
devices (PD/LD) to SML.  Driver will check for FW support for this new DCMD
and based on the support will either send the new DCMD or will fall back to
the earlier method of sending two separate DCMDs for PD and LD list.
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

In preparation of adding support for the DEVICE_LIST DCMD, this patch
refactors the code in the AEN event handling path.  Add new function to
update the PD and LD list in driver.  Move the code to scan PD and VD
channels into separate function.
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

During FW init, combine the code to get the PD and LD list from FW into a
single function.  This patch is in preparation for adding support for
HOST_DEVICE_LIST DCMD.
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Currently I am managing the Synopsys drivers & tools team (full-time)
and so I am passing the DWC UFS driver maintenance to Pedro Sousa.
Signed-off-by: Joao Pinto <joao.pinto@synopsys.com>
Cc: Pedro Sousa <pedrom.sousa@synopsys.com>
Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Alex Lemberg <Alex.Lemberg@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

According to git log and the linux-scsi archives, Vinayak has been inactive
for several years. Removing him as maintainer will make the
get_maintainer.pl script generate an extensive list of recipients.  Add
three reviewers as well to vet future UFS patches.
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Acked-by: Joao Pinto <jpinto@synopsys.com>
Acked-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

There are several issues with badly indented statements. Fix these
and clean up the formatting.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Mahesh Rajashekhara <mahesh.rajashekhara@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

There is no need to call twice string_get_size() when the capacity messages
are not going to be printed. Reverse the message output condition to return
early and avoid executing string_get_size() when it is not necessary.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

uic errors are currently printed out of time order.

Make things more readable by printing logs in time order, and printing
"No record" if history is empty.
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Tested-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Treat text_in and padding as a single buffer instead of two buffers.

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Use a single loop to dump immediate data, padding and digest instead of
using separate rx_data() calls for each type of data.

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

When using SCSI passthrough in combination with the iSCSI target driver
then cmd->t_state_lock may be obtained from interrupt context. Hence, all
code that obtains cmd->t_state_lock from thread context must disable
interrupts first. This patch avoids that lockdep reports the following:

WARNING: inconsistent lock state
4.18.0-dbg+ #1 Not tainted
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
iscsi_ttx/1800 [HC1[1]:SC0[2]:HE0:SE0] takes:
000000006e7b0ceb (&(&cmd->t_state_lock)->rlock){?...}, at: target_complete_cmd+0x47/0x2c0 [target_core_mod]
{HARDIRQ-ON-W} state was registered at:
 lock_acquire+0xd2/0x260
 _raw_spin_lock+0x32/0x50
 iscsit_close_connection+0x97e/0x1020 [iscsi_target_mod]
 iscsit_take_action_for_connection_exit+0x108/0x200 [iscsi_target_mod]
 iscsi_target_rx_thread+0x180/0x190 [iscsi_target_mod]
 kthread+0x1cf/0x1f0
 ret_from_fork+0x24/0x30
irq event stamp: 1281
hardirqs last  enabled at (1279): [<ffffffff970ade79>] __local_bh_enable_ip+0xa9/0x160
hardirqs last disabled at (1281): [<ffffffff97a008a5>] interrupt_entry+0xb5/0xd0
softirqs last  enabled at (1278): [<ffffffff977cd9a1>] lock_sock_nested+0x51/0xc0
softirqs last disabled at (1280): [<ffffffffc07a6e04>] ip6_finish_output2+0x124/0xe40 [ipv6]

other info that might help us debug this:
Possible unsafe locking scenario:

      CPU0
      ----
 lock(&(&cmd->t_state_lock)->rlock);
 <Interrupt>
   lock(&(&cmd->t_state_lock)->rlock);

*** DEADLOCK ***

3 locks held by iscsi_ttx/1800:
*0: 00000000c3b711b7 (sk_lock-AF_INET6){+.+.}, at: tcp_sendmsg+0x1e/0x50
*1: 00000000fa81046f (rcu_read_lock){....}, at: inet6_csk_xmit+0xc7/0x2e0 [ipv6]
*2: 00000000c091d70d (rcu_read_lock_bh){....}, at: ip6_finish_output2+0x124/0xe40 [ipv6]

stack backtrace:
CPU: 0 PID: 1800 Comm: iscsi_ttx Not tainted 4.18.0-dbg+ #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
Call Trace:
<IRQ>
dump_stack+0xa4/0xf5
print_usage_bug+0x25b/0x27b
mark_lock+0x70f/0x7b0
__lock_acquire+0xbc2/0x1b50
lock_acquire+0xd2/0x260
_raw_spin_lock_irqsave+0x4a/0x60
target_complete_cmd+0x47/0x2c0 [target_core_mod]
target_complete_cmd_with_length+0x70/0xa0 [target_core_mod]
pscsi_req_done+0x335/0x530 [target_core_pscsi]
__blk_mq_end_request+0xa5/0x140
scsi_end_request+0x112/0x320 [scsi_mod]
scsi_io_completion+0x183/0xa30 [scsi_mod]
scsi_finish_command+0x1c0/0x280 [scsi_mod]
scsi_softirq_done+0x19a/0x230 [scsi_mod]
__blk_mq_complete_request_remote+0x2f/0x40
flush_smp_call_function_queue+0x12a/0x220
generic_smp_call_function_single_interrupt+0x13/0x30
smp_call_function_single_interrupt+0x7a/0x350
call_function_single_interrupt+0xf/0x20
</IRQ>
RIP: 0010:__asan_load4+0x1e/0x80
debug_lockdep_rcu_enabled+0x26/0x40
ip6_finish_output2+0x15a/0xe40 [ipv6]
ip6_finish_output+0x308/0x440 [ipv6]
ip6_output+0x11d/0x3b0 [ipv6]
ip6_xmit+0x639/0xc50 [ipv6]
inet6_csk_xmit+0x198/0x2e0 [ipv6]
__tcp_transmit_skb+0xc1b/0x15b0
tcp_write_xmit+0x42e/0x1f20
__tcp_push_pending_frames+0x59/0x150
tcp_push+0x189/0x270
tcp_sendmsg_locked+0x7b9/0x1680
tcp_sendmsg+0x2c/0x50
inet_sendmsg+0x71/0x250
sock_sendmsg+0x4c/0x60
tx_data+0x12b/0x1f0 [iscsi_target_mod]
iscsit_send_tx_data+0x77/0xe0 [iscsi_target_mod]
iscsit_xmit_pdu+0x2c5/0x740 [iscsi_target_mod]
iscsit_response_queue+0x941/0xd40 [iscsi_target_mod]
iscsi_target_tx_thread+0x23b/0x350 [iscsi_target_mod]
kthread+0x1cf/0x1f0
ret_from_fork+0x24/0x30

Fixes: 064cdd2d ("target: Fix race between iscsi-target connection shutdown + ABORT_TASK")
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Having both a function and a function pointer member with the same
name (iscsit_release_cmd) is confusing. Hence rename the function pointer
member.

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Change "unsoliticed" into "unsolicited".

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The single iscsit_start_nopin_response_timer() caller does not hold any
locks. Hence remove the comment above this function.

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Make sure that the next time a response is sent to the initiator that the
credit it had allocated for the aborted request gets freed.

Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Fixes: 131e6abc ("target: Add TFO->abort_task for aborted task resources release") # v3.15
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Instead of maintaining a list of free I/O contexts, use an sbitmap data
structure to track which I/O contexts are in use and which are free. This
makes the ib_srpt driver more consistent with other LIO drivers.

Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

If submitting a TMF to the target core fails, send the "FUNCTION REJECTED"
response to the initiator.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

If submitting an SRP IU to the target core fails, send the SCSI response
"BUSY" to the initiator instead of not sending any response.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Introduce a function that sends the SCSI status "BUSY" back to the
initiator. The next patch will add a call to this function in the srpt
target driver.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Remove the code that clears .se_lun from transport_cmd_check_stop_to_fabric()
such that the transport_lun_remove_cmd() call can be moved into
target_release_cmd_kref(). Because this guarantees that
transport_lun_remove_cmd() will be called exactly once, it is safe to change
the cmpxchg() call into a test of se_cmd.lun_ref_active. Inline
transport_lun_remove_cmd() because it is not worth to keep it as a separate
function.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Due to the task management handling rework it is safe to wait for a TMF
that is not in the active state. Hence remove the CMD_T_ACTIVE test from
core_tmr_drain_tmr_list(). Additionally, call __target_check_io_state()
instead of open coding it.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Whether or not a session is being torn down does not affect whether or not
SCSI commands are in the task set. Hence remove the "tearing down" checks
from the TMF code. The TRANSPORT_ISTATE_PROCESSING check is left out
because it is now safe to wait for a command that is in that state. The
CMD_T_PRE_EXECUTE is left out because abort processing is postponed until
after commands have left the pre-execute state since the patch that makes
TMF processing synchronous.

See also commit 1c21a480 ("target: Avoid early CMD_T_PRE_EXECUTE
failures during ABORT_TASK").

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Due to the patch that makes TMF handling synchronous the
write_pending_status() callback function is no longer called.  Hence remove
it.
Acked-by: Felipe Balbi <balbi@ti.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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

drivers/scsi/csiostor/csio_attr.c: In function 'csio_fcoe_free_vnp':
drivers/scsi/csiostor/csio_attr.c:500:21: warning:
 variable 'pln' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch adds new BIT detection to enable FC-NVMe feature in the driver.

[mkp: fixed Giridhar's SoB]
Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>