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Author SHA1 Message Date
Stanley Chu
b058fa8682 scsi: ufs: Remove redundant null checking of devfreq instance 
hba->devfreq is zero-initialized thus it is not required to check its
existence in ufshcd_add_lus() function which is invoked during
initialization only.

Link: https://lore.kernel.org/r/20210120150142.5049-3-stanley.chu@mediatek.com
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:29:38 -05:00
Stanley Chu
f9a7fa345a scsi: ufs: Refactor cancelling clkscaling works 
Cancelling suspend_work and resume_work is only required while suspending
clk-scaling. Move these two invocations into ufshcd_suspend_clkscaling()
function.

Link: https://lore.kernel.org/r/20210120150142.5049-2-stanley.chu@mediatek.com
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:29:37 -05:00
Can Guo
b02d51afca Revert "Make sure clk scaling happens only when HBA is runtime ACTIVE" 
Commit 73cc291c27 ("scsi: ufs: Make sure clk scaling happens only
when HBA is runtime ACTIVE") is no longer needed since commit
0e9d4ca43b ("scsi: ufs: Protect some contexts from unexpected clock
scaling") is a more mature fix to protect UFS LLD stability from clock
scaling invoked through sysfs nodes by users.

Link: https://lore.kernel.org/r/1611137065-14266-4-git-send-email-cang@codeaurora.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:23:56 -05:00
Can Guo
4543d9d782 scsi: ufs: Refactor ufshcd_init/exit_clk_scaling/gating() 
ufshcd_hba_exit() is always called after ufshcd_exit_clk_scaling() and
ufshcd_exit_clk_gating(). Move ufshcd_exit_clk_scaling/gating() to
ufshcd_hba_exit(). Meanwhile, add dedicated functions to initialize
and remove sysfs nodes of clock scaling/gating to make the code more
readable. Overall functionality remains same.

Link: https://lore.kernel.org/r/1611137065-14266-3-git-send-email-cang@codeaurora.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:23:23 -05:00
Can Guo
0e9d4ca43b scsi: ufs: Protect some contexts from unexpected clock scaling 
In contexts like suspend, shutdown, and error handling we need to
suspend devfreq to make sure these contexts won't be disturbed by
clock scaling.  However, suspending devfreq is not enough since users
can still trigger a clock scaling by manipulating the devfreq sysfs
nodes like min/max_freq and governor even after devfreq is
suspended. Moreover, mere suspending devfreq cannot synchroinze a
clock scaling which has already been invoked through these sysfs
nodes. Add one more flag in struct clk_scaling and wrap the entire
func ufshcd_devfreq_scale() with the clk_scaling_lock, so that we can
use this flag and clk_scaling_lock to control and synchronize clock
scaling invoked through devfreq sysfs nodes.

Link: https://lore.kernel.org/r/1611137065-14266-2-git-send-email-cang@codeaurora.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:22:02 -05:00
Bean Huo
4cd4899564 scsi: ufs: Group UFS WB related flags in struct ufs_dev_info 
UFS device-related flags should be grouped in ufs_dev_info. Move wb_enabled
and wb_buf_flush_enabled out from struct ufs_hba, group them in struct
ufs_dev_info, and align the names of the structure members vertically.

Link: https://lore.kernel.org/r/20210119163847.20165-6-huobean@gmail.com
Reviewed-by: Can Guo <cang@codeaurora.org>
Acked-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:21:38 -05:00
Bean Huo
e8d0381394 scsi: ufs: Remove two WB related fields from struct ufs_dev_info 
d_wb_alloc_units and d_ext_ufs_feature_sup are only used during WB probe.
They are used to confirm the condition that "if bWriteBoosterBufferType
is set to 01h but dNumSharedWriteBoosterBufferAllocUnits is set to zero,
the WriteBooster feature is disabled", and if UFS device supports WB.

No need to keep them after probing is complete.

Link: https://lore.kernel.org/r/20210119163847.20165-5-huobean@gmail.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:12:30 -05:00
Bean Huo
ae1ce1fc61 scsi: ufs: Update comment in the function ufshcd_wb_probe() 
USFHCD supports both WriteBooster "LU dedicated buffer" mode and "shared
buffer" mode. Update the comment accordingly in the function
ufshcd_wb_probe().

Link: https://lore.kernel.org/r/20210119163847.20165-4-huobean@gmail.com
Reviewed-by: Can Guo <cang@codeaurora.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:12:30 -05:00
Bean Huo
06aea26676 scsi: ufs: docs: ABI: Add wb_on documentation for new entry wb_on 
Adds UFS sysfs documentation for new entry wb_on.

[mkp: fix doc formatting]

Link: https://lore.kernel.org/r/20210119163847.20165-3-huobean@gmail.com
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

fix format
 2021-01-20 22:12:21 -05:00
Bean Huo
8e834ca551 scsi: ufs: Add "wb_on" sysfs node to control WB on/off 
Currently UFS WriteBooster driver uses clock scaling up/down to set WB
on/off. For the platforms which don't support UFSHCD_CAP_CLK_SCALING, WB
will be always on. Provide a sysfs attribute to enable/disable WB during
runtime. Write 1/0 to "wb_on" sysfs node to enable/disable UFS WB.

Link: https://lore.kernel.org/r/20210119163847.20165-2-huobean@gmail.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 22:08:33 -05:00
Kiwoong Kim
f1ef9047aa scsi: ufs: ufs-exynos: Use UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE 
Exynos needs scatterlist entries aligned to page size because it isn't
capable of transferring data contained in one DATA IN operation to seversal
areas in memory.

Link: https://lore.kernel.org/r/80d7e27d6ec537e650a6bd74897b6c60618efcdc.1611026909.git.kwmad.kim@samsung.com
Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 21:54:58 -05:00
Kiwoong Kim
2b2bfc8aa5 scsi: ufs: Introduce a quirk to allow only page-aligned sg entries 
Some SoCs require a single scatterlist entry for smaller than page size,
i.e. 4KB. When dispatching commands with more than one scatterlist entry
under 4KB in size the following behavior is observed:

A command to read a block range is dispatched with two scatterlist entries
that are named AAA and BBB. After dispatching, the host builds two PRDT
entries and during transmission, device sends just one DATA IN because
device doesn't care about host DMA. The host then transfers the combined
amount of data from start address of the area named AAA. As a consequence,
the area that follows AAA in memory would be corrupted.

    |<------------->|
    +-------+------------         +-------+
    +  AAA  + (corrupted)   ...   +  BBB  +
    +-------+------------         +-------+

To avoid this we need to enforce page size alignment for sg entries.

Link: https://lore.kernel.org/r/56dddef94f60bd9466fd77e69f64bbbd657ed2a1.1611026909.git.kwmad.kim@samsung.com
Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 21:53:44 -05:00
Bean Huo
60ec37555d scsi: ufs: Delete redundant if statement in ufshcd_intr() 
Once going into while-do loop, intr_status is already true, this
if-statement is redundant, remove it.

Link: https://lore.kernel.org/r/20210118201233.3043-1-huobean@gmail.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 21:45:20 -05:00
Colin Ian King
ff79acc49a scsi: ibmvfc: Fix spelling mistake "succeded" -> "succeeded" 
There is a spelling mistake in a ibmvfc_dbg debug message. Fix it.

Link: https://lore.kernel.org/r/20210118111346.70798-1-colin.king@canonical.com
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 21:42:20 -05:00
Christophe JAILLET
8e60a7deca scsi: pm80xx: Switch from 'pci_' to 'dma_' API 
The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below and has been
hand modified to replace GFP_ with a correct flag.  It has been compile
tested.

When memory is allocated in 'pm8001_init_ccb_tag()' GFP_KERNEL can be used
because this function already uses this flag a few lines above.

While at it, remove "pm80xx: " in a debug message. 'pm8001_dbg()' already
adds the driver name in the message.

@@
@@
-    PCI_DMA_BIDIRECTIONAL
+    DMA_BIDIRECTIONAL

@@
@@
-    PCI_DMA_TODEVICE
+    DMA_TO_DEVICE

@@
@@
-    PCI_DMA_FROMDEVICE
+    DMA_FROM_DEVICE

@@
@@
-    PCI_DMA_NONE
+    DMA_NONE

@@
expression e1, e2, e3;
@@
-    pci_alloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3;
@@
-    pci_zalloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3, e4;
@@
-    pci_free_consistent(e1, e2, e3, e4)
+    dma_free_coherent(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_single(e1, e2, e3, e4)
+    dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_single(e1, e2, e3, e4)
+    dma_unmap_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4, e5;
@@
-    pci_map_page(e1, e2, e3, e4, e5)
+    dma_map_page(&e1->dev, e2, e3, e4, e5)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_page(e1, e2, e3, e4)
+    dma_unmap_page(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_sg(e1, e2, e3, e4)
+    dma_map_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_sg(e1, e2, e3, e4)
+    dma_unmap_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+    dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_device(e1, e2, e3, e4)
+    dma_sync_single_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+    dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+    dma_sync_sg_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2;
@@
-    pci_dma_mapping_error(e1, e2)
+    dma_mapping_error(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_dma_mask(e1, e2)
+    dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_consistent_dma_mask(e1, e2)
+    dma_set_coherent_mask(&e1->dev, e2)

Link: https://lore.kernel.org/r/20210117132445.562552-1-christophe.jaillet@wanadoo.fr
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 21:40:38 -05:00
Colin Ian King
7b382122d2 scsi: pm80xx: Clean up indentation of a code block 
A block of code is indented one level too deeply, clean this up.

Link: https://lore.kernel.org/r/20210115095824.9170-1-colin.king@canonical.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Addresses-Coverity: ("Indentation does not match nesting level")
 2021-01-20 21:38:56 -05:00
Martin K. Petersen
938a2fbefb Merge branch '5.11/scsi-fixes' into 5.12/scsi-queue 
Pull in the 5.11 SCSI fixes branch to provide an updated baseline for
megaraid and hisi_sas. Both drivers received core changes in
v5.11-rc3.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-20 18:26:06 -05:00
Muneendra Kumar
7f3a79a7fd scsi: lpfc: Add support for eh_should_retry_cmd() 
Add support for eh_should_retry_cmd callback in lpfc_template.

Link: https://lore.kernel.org/r/1609969748-17684-6-git-send-email-muneendra.kumar@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:55:18 -05:00
Muneendra Kumar
afdd112694 scsi: scsi_transport_fc: Add store capability to rport port_state in sysfs 
Add store capability to the rport port_state using sysfs under
fc_remote_ports/rport-*/port_state.

With this the user can move the port_state from Marginal->Online and
Online->Marginal.

 - Marginal: This interface will set SCMD_NORETRIES_ABORT bit in
   scmd->state for all the pending I/Os on the SCSI device associated with
   target port.

 - Online: This interface will clear SCMD_NORETRIES_ABORT bit in
   scmd->state for all the pending I/Os on the SCSI device associated with
   target port.

The following interface is provided to set the port state to Marginal and
Online respectively:

echo "Marginal" >> /sys/class/fc_remote_ports/rport-X\:Y-Z/port_state
echo "Online" >> /sys/class/fc_remote_ports/rport-X\:Y-Z/port_state

Link: https://lore.kernel.org/r/1609969748-17684-5-git-send-email-muneendra.kumar@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:55:17 -05:00
Muneendra Kumar
02c66326dc scsi: scsi_transport_fc: Add a new rport state FC_PORTSTATE_MARGINAL 
Add a new interface, fc_eh_should_retry_cmd(), which checks if the cmd
should be retried or not by checking the rport state. If the rport state is
marginal it returns false to make sure there won't be any retries on the
cmd.

Make the fc_remote_port_delete(), fc_user_scan_tgt(), and
fc_timeout_deleted_rport() functions handle the new rport state.

Link: https://lore.kernel.org/r/1609969748-17684-4-git-send-email-muneendra.kumar@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:55:17 -05:00
Muneendra Kumar
60bee27ba2 scsi: core: No retries on abort success 
Add a new optional routine, eh_should_retry_cmd(), in scsi_host_template
that allows the transport to decide if a cmd is retryable. Return true if
the transport is in a state the cmd should be retried on.

Update scmd_eh_abort_handler() and scsi_eh_flush_done_q() to both call
scsi_eh_should_retry_cmd() to check whether the command needs to be
retried.

The above changes were based on a patch by Mike Christie.

Link: https://lore.kernel.org/r/1609969748-17684-3-git-send-email-muneendra.kumar@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:55:17 -05:00
Muneendra Kumar
962c8dcdd5 scsi: core: Add a new error code DID_TRANSPORT_MARGINAL in scsi.h 
Add code in scsi_result_to_blk_status to translate a new error
DID_TRANSPORT_MARGINAL to the corresponding blk_status_t i.e
BLK_STS_TRANSPORT.

Add DID_TRANSPORT_MARGINAL case to scsi_decide_disposition().

Link: https://lore.kernel.org/r/1609969748-17684-2-git-send-email-muneendra.kumar@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:55:17 -05:00
Tyrel Datwyler
032d190086 scsi: ibmvfc: Provide modules parameters for MQ settings 
Add the various module parameter toggles for adjusting the MQ
characteristics at boot/load time as well as a device attribute for
changing the client scsi channel request amount.

Link: https://lore.kernel.org/r/20210114203148.246656-22-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:31:04 -05:00
Tyrel Datwyler
9000cb998b scsi: ibmvfc: Enable MQ and set reasonable defaults 
Turn on MQ by default and set sane values for the upper limit on hw queues
for the SCSI host, and number of hw SCSI channels to request from the
partner VIOS.

Link: https://lore.kernel.org/r/20210114203148.246656-21-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:31:04 -05:00
Tyrel Datwyler
7eb3ccd884 scsi: ibmvfc: Purge SCSI channels after transport loss/reset 
Grab the queue and list lock for each Sub-CRQ and add any uncompleted
events to the host purge list.

Link: https://lore.kernel.org/r/20210114203148.246656-20-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:31:04 -05:00
Tyrel Datwyler
a835f386f9 scsi: ibmvfc: Send Cancel MAD down each hw SCSI channel 
In general the client needs to send Cancel MADs and task management
commands down the same channel as the command(s) intended to cancel or
abort. The client assigns cancel keys per LUN and thus must send a Cancel
down each channel commands were submitted for that LUN. Further, the client
then must wait for those cancel completions prior to submitting a LUN RESET
or ABORT TASK SET.

Add a cancel rsp iu syncronization field to the ibmvfc_queue struct such
that the cancel routine can sync the cancel response to each queue that
requires a cancel command. Build a list of each cancel event sent and wait
for the completion of each submitted cancel.

Link: https://lore.kernel.org/r/20210114203148.246656-19-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:31:04 -05:00
Tyrel Datwyler
a61236da7f scsi: ibmvfc: Add cancel mad initialization helper 
Add a helper routine for initializing a Cancel MAD. This will be useful for
a channelized client that needs to send Cancel commands down every channel
commands were sent for a particular LUN.

Link: https://lore.kernel.org/r/20210114203148.246656-18-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:31:04 -05:00
Tyrel Datwyler
b88a5d9b7f scsi: ibmvfc: Register Sub-CRQ handles with VIOS during channel setup 
If the ibmvfc client adapter requests channels it must submit a number of
Sub-CRQ handles matching the number of channels being requested. The VIOS
in its response will overwrite the actual number of channel resources
allocated which may be less than what was requested. The client then must
store the VIOS Sub-CRQ handle for each queue. This VIOS handle is needed as
a parameter with h_send_sub_crq().

Link: https://lore.kernel.org/r/20210114203148.246656-17-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:31:04 -05:00
Tyrel Datwyler
31750fbd7b scsi: ibmvfc: Send commands down HW Sub-CRQ when channelized 
When the client has negotiated the use of channels all vfcFrames are
required to go down a Sub-CRQ channel or it is a protocoal violation. If
the adapter state is channelized submit vfcFrames to the appropriate
Sub-CRQ via the h_send_sub_crq() helper.

Link: https://lore.kernel.org/r/20210114203148.246656-16-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:31:03 -05:00
Tyrel Datwyler
cb72477be7 scsi: ibmvfc: Set and track hw queue in ibmvfc_event struct 
Extract the hwq id from a SCSI command and store it in the ibmvfc_event
structure to identify which Sub-CRQ to send the command down when channels
are being utilized.

Link: https://lore.kernel.org/r/20210114203148.246656-15-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:29:38 -05:00
Tyrel Datwyler
c53408baa5 scsi: ibmvfc: Advertise client support for using hardware channels 
Previous patches have plumbed the necessary Sub-CRQ interface and channel
negotiation MADs to fully channelize via hardware backed queues.

Advertise client support via NPIV Login capability IBMVFC_CAN_USE_CHANNELS
when the client bits have MQ enabled via vhost->mq_enabled, or when
channels were already in use during a subsequent NPIV Login. The later is
required because channel support is only renegotiated after a CRQ pair is
broken. Simple NPIV Logout/Logins require the client to continue to
advertise the channel capability until the CRQ pair between the client is
broken.

Link: https://lore.kernel.org/r/20210114203148.246656-14-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:45 -05:00
Tyrel Datwyler
e95eef3fc0 scsi: ibmvfc: Implement channel enquiry and setup commands 
New NPIV_ENQUIRY_CHANNEL and NPIV_SETUP_CHANNEL management datagrams (MADs)
were defined in a previous patchset. If the client advertises a desire to
use channels and the partner VIOS is channel capable then the client must
proceed with channel enquiry to determine the maximum number of channels
the VIOS is capable of providing, and registering SubCRQs via channel setup
with the VIOS immediately following NPIV Login. This handshaking should not
be performed for subsequent NPIV Logins unless the CRQ connection has been
reset.

Implement these two new MADs and issue them following a successful NPIV
login where the VIOS has set the SUPPORT_CHANNELS capability bit in the
NPIV Login response.

Link: https://lore.kernel.org/r/20210114203148.246656-13-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:45 -05:00
Tyrel Datwyler
39e461fddf scsi: ibmvfc: Map/request irq and register Sub-CRQ interrupt handler 
Create an irq mapping for the hw_irq number provided from phyp firmware.
Request an irq assigned our Sub-CRQ interrupt handler. Unmap these irqs at
Sub-CRQ teardown.

Link: https://lore.kernel.org/r/20210114203148.246656-12-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:44 -05:00
Tyrel Datwyler
80a9e8eaed scsi: ibmvfc: Define Sub-CRQ interrupt handler routine 
Simple handler that calls Sub-CRQ drain routine directly.

Link: https://lore.kernel.org/r/20210114203148.246656-11-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:44 -05:00
Tyrel Datwyler
1d956ad853 scsi: ibmvfc: Add handlers to drain and complete Sub-CRQ responses 
The logic for iterating over the Sub-CRQ responses is similiar to that of
the primary CRQ. Add the necessary handlers for processing those responses.

Link: https://lore.kernel.org/r/20210114203148.246656-10-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:44 -05:00
Tyrel Datwyler
d20046e64c scsi: ibmvfc: Add Sub-CRQ IRQ enable/disable routine 
Each Sub-CRQ has its own interrupt. A hypercall is required to toggle the
IRQ state. Provide the necessary mechanism via a helper function.

Link: https://lore.kernel.org/r/20210114203148.246656-9-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:44 -05:00
Tyrel Datwyler
3034ebe263 scsi: ibmvfc: Add alloc/dealloc routines for SCSI Sub-CRQ Channels 
Allocate a set of Sub-CRQs in advance. During channel setup the client and
VIOS negotiate the number of queues the VIOS supports and the number that
the client desires to request. Its possible that the final channel
resources allocated is less than requested, but the client is still
responsible for sending handles for every queue it is hoping for.

Also, provide deallocation cleanup routines.

Link: https://lore.kernel.org/r/20210114203148.246656-8-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:44 -05:00
Tyrel Datwyler
6d07f129dc scsi: ibmvfc: Add Subordinate CRQ definitions 
Subordinate Command Response Queues (Sub CRQ) are used in conjunction with
the primary CRQ when more than one queue is needed by the virtual I/O
adapter. Recent phyp firmware versions support Sub CRQ's with ibmvfc
adapters. This feature is a prerequisite for supporting multiple hardware
backed submission queues in the vfc adapter.

The Sub CRQ command element differs from the standard CRQ in that it is
32bytes long as opposed to 16bytes for the latter. Despite this extra
16bytes the ibmvfc protocol will use the original CRQ command element
mapped to the first 16bytes of the Sub CRQ element initially.

Add definitions for the Sub CRQ command element and queue.

Link: https://lore.kernel.org/r/20210114203148.246656-7-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:44 -05:00
Tyrel Datwyler
9e6b6b81aa scsi: ibmvfc: Define hcall wrapper for registering a Sub-CRQ 
Sub-CRQs are registred with firmware via a hypercall. Abstract that
interface into a simpler helper function.

Link: https://lore.kernel.org/r/20210114203148.246656-6-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:44 -05:00
Tyrel Datwyler
bb35ecb2a9 scsi: ibmvfc: Add size parameter to ibmvfc_init_event_pool() 
With the upcoming addition of Sub-CRQs the event pool size may vary
per-queue.

Add a size parameter to ibmvfc_init_event_pool() such that different size
event pools can be requested by ibmvfc_alloc_queue().

Link: https://lore.kernel.org/r/20210114203148.246656-5-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:43 -05:00
Tyrel Datwyler
003d91a139 scsi: ibmvfc: Init/free event pool during queue allocation/free 
The event pool and CRQ used to be separate entities of the adapter host
structure and as such were allocated and freed independently of each
other. Recent work as defined a generic queue structure with an event pool
specific to each queue. As such the event pool for each queue shouldn't be
allocated/freed independently, but instead performed as part of the queue
allocation/free routines.

Move the calls to ibmvfc_event_pool_{init|free} into
ibmvfc_{alloc|free}_queue respectively. The only functional change here is
that the CRQ cannot be released in ibmvfc_remove until after the event pool
has been successfully purged since releasing the queue will also free the
event pool.

Link: https://lore.kernel.org/r/20210114203148.246656-4-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:43 -05:00
Tyrel Datwyler
225acf5f1a scsi: ibmvfc: Move event pool init/free routines 
The next patch in this series reworks the event pool allocation calls to
happen within the individual queue allocation routines instead of as
independent calls.

Move the init/free routines earlier in ibmvfc.c to prevent undefined
reference errors when calling these functions from the queue allocation
code. No functional change.

Link: https://lore.kernel.org/r/20210114203148.246656-3-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:43 -05:00
Tyrel Datwyler
6ae208e5d2 scsi: ibmvfc: Add vhost fields and defaults for MQ enablement 
Introduce several new vhost fields for managing MQ state of the adapter as
well as initial defaults for MQ enablement.

Link: https://lore.kernel.org/r/20210114203148.246656-2-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:27:43 -05:00
Can Guo
9cd20d3f47 scsi: ufs: Protect PM ops and err_handler from user access through sysfs 
User layer may access sysfs nodes when system PM ops or error handling is
running. This can cause various problems. Rename eh_sem to host_sem and use
it to protect PM ops and error handling from user layer intervention.

Link: https://lore.kernel.org/r/1610594010-7254-3-git-send-email-cang@codeaurora.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Acked-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:12:35 -05:00
Can Guo
fb7afe24ba scsi: ufs: Fix a possible NULL pointer issue 
During system resume/suspend, hba could be NULL. In this case, do not touch
eh_sem.

Fixes: 88a92d6ae4 ("scsi: ufs: Serialize eh_work with system PM events and async scan")
Link: https://lore.kernel.org/r/1610594010-7254-2-git-send-email-cang@codeaurora.org
Acked-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-14 22:12:35 -05:00
John Garry
e8e5df5edd scsi: MAINTAINERS: Remove intel-linux-scu@intel.com for INTEL C600 SAS DRIVER 
The mail address intel-linux-scu@intel.com bounces. Remove it.

Link: https://lore.kernel.org/r/1610449890-198089-1-git-send-email-john.garry@huawei.com
Cc: Ahmed S. Darwish <a.darwish@linutronix.de>
Cc: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Acked-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-13 00:31:12 -05:00
Bean Huo
b64750a1b6 scsi: ufs: Remove unnecessary devm_kfree() 
The memory allocated with devm_kzalloc() is freed automatically no need to
explicitly call devm_kfree(). Delete it and save some instruction cycles.

Link: https://lore.kernel.org/r/20210112092128.19295-1-huobean@gmail.com
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-13 00:30:04 -05:00
YANG LI
af0c94afc0 scsi: lpfc: Simplify bool comparison 
Fix the following coccicheck warning:

./drivers/scsi/lpfc/lpfc_bsg.c:5392:5-29: WARNING: Comparison to bool

Link: https://lore.kernel.org/r/1610439893-64872-1-git-send-email-abaci-bugfix@linux.alibaba.com
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: YANG LI <abaci-bugfix@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-13 00:28:22 -05:00
Jaegeuk Kim
a2fca52ee6 scsi: ufs: WB is only available on LUN #0 to #7 
Kernel stack violation when getting unit_descriptor/wb_buf_alloc_units from
rpmb LUN. The reason is that the unit descriptor length is different per
LU.

The length of Normal LU is 45 while the one of rpmb LU is 35.

int ufshcd_read_desc_param(struct ufs_hba *hba, ...)
{
	param_offset=41;
	param_size=4;
	buff_len=45;
	...
	buff_len=35 by rpmb LU;

	if (is_kmalloc) {
		/* Make sure we don't copy more data than available */
		if (param_offset + param_size > buff_len)
			param_size = buff_len - param_offset;
			--> param_size = 250;
		memcpy(param_read_buf, &desc_buf[param_offset], param_size);
		--> memcpy(param_read_buf, desc_buf+41, 250);

[  141.868974][ T9174] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: wb_buf_alloc_units_show+0x11c/0x11c
	}
}

Link: https://lore.kernel.org/r/20210111095927.1830311-1-jaegeuk@kernel.org
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-13 00:27:46 -05:00
Nilesh Javali
dc0d9b12b8 scsi: qla2xxx: Update version to 10.02.00.105-k 
Link: https://lore.kernel.org/r/20210111093134.1206-8-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2021-01-13 00:25:20 -05:00