This patch implements pre and post FLR handlers to support PCIe FLR
functionality. Software cleanup is performed in pre-FLR whereas
firmware is downloaded and software is re-initialised in
post-FLR handler.

Following command triggers FLR.
echo "1" > /sys/bus/pci/devices/$NUMBER/reset

This feature can be used as a recovery mechanism when firmware gets
hang.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

By default normal mode is chosen when driver is loaded. This
patch adds a provision to choose manufacturing mode via module
parameters.

Below command loads driver in manufacturing mode
insmod mwifiex.ko mfg_mode=1.
Tested-by: Nchunfan chen <jeffc@marvell.com>
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Printing about 3000 lines like this

[   20.691850] mwifiex_pcie 0000:02:00.0: .
[   20.693466] mwifiex_pcie 0000:02:00.0: .

is not useful. If FW downloading will be interrupted, we will get
proper error message about that.
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

For debugging purpose print content of reg->fw_status register and other
variables values when waiting for firmware ready event.
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Printing ret and adapter->winner do not provide any useful information
as those are always 0 at point where the massage is printed. Print value
read from reg->fw_status register instead.

Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Same skb is being reused for storing command response from firmware
in PCIe chipsets. There was a bug while updating the skb length.
This patch ensures skb length correctly gets updated based on rx_len.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

In corner case, we may end up processing same interrupt twice.
We have a logic to read pending interrupts at the end of interrupt
processing routine. It has a race with interrupts read in interrupt
handler. This patch solves the problem by ORing the interrupt bitmap
in this case.

The symptom for this bug is below messages in dmesg log.

[   11.522123] mwifiex_pcie 0000:01:00.0: CMD_RESP: invalid cmd resp
[   11.680412] mwifiex_pcie 0000:01:00.0: There is no command but got cmdrsp

Link: https://bugzilla.kernel.org/show_bug.cgi?id=109681Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

It's been observed that request_irq() failure leads to a system crash
due to a bug in mwifiex driver.
When this failure happens, mwifiex_add_card() already takes care of
clearing and freeing adapter->card pointer. This patch removes the
redundant cleanup code causing crash.
Signed-off-by: NKarthik D A <karthida@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

As interrupt is read in interrupt handler as well as interrupt processing
thread, we observed a corner case issue for MSI in which interrupt gets
processed twice.

This patch moves interrupt reading code for MSI mode from
mwifiex_interrupt_status() to mwifiex_pcie_process_int() to avoid the
issue.
Signed-off-by: NShengzhen Li <szli@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

The PCIe driver didn't mask the host interrupts before trying to tear
down. This causes lockups at reboot or rmmod when using MSI-X on 8997,
since the MSI handler gets confused and locks up the system.

Also tested on 8897, which does not support MSI-X (and wasn't
experiencing this same bug). No regressions seen there.
Signed-off-by: NBrian Norris <briannorris@chromium.org>
Tested-by: NDouglas Anderson <dianders@chromium.org>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

PCIe-USB8997 variant is being used in the product. Let's change default
firmware from PCIe-UART to PCIe-USB. So by default PCIe-USB firmware would
be downloaded if version register doesn't give any information.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

The GFP_DMA flag is obviously misunderstood in the mwifiex driver. It's
meant for legacy ISA DMA memory mappings only -- the lower 16MB on x86.
That doesn't apply to PCIe or SDIO devices, I guess.

Remove the GFP_DMA flag to reduce the need to place the socket buffer
allocation into the low mem DMA area, which might already be in use by
other drivers.

This misuse was flagged by the PaX USERCOPY feature by chance, as it
detected the user copy operation from a DMA buffer in the recvfrom()
syscall path.
Signed-off-by: NMathias Krause <minipli@googlemail.com>
Tested-by: NDennis Wassenberg <dennis.wassenberg@secunet.com>
Cc: Amitkumar Karwar <akarwar@marvell.com>
Cc: Nishant Sarmukadam <nishants@marvell.com>
Cc: Xinming Hu <huxm@marvell.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Brad Spengler <spender@grsecurity.net>
Cc: PaX Team <pageexec@freemail.hu>
Acked-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Do not dereference card before checking against NULL value.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

firmare -> firmware
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch adds default setting for pcie firmware download name in
case that there are newer chipset version.
Signed-off-by: NShengzhen Li <szli@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch adds support for downloading usb/uart firmware for
8997 chipset by reading the chip version.
Signed-off-by: NShengzhen Li <szli@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch adds missing break statement at the end of
PCIE_DEVICE_ID_MARVELL_88W8897 switch section.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch prints pcie scratch registers during firmware dump. They
will be useful for analysing firmware status.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Some of the chipsets have two revisions. This patch
selects appropriate firmware by checking revision id.
Signed-off-by: NShengzhen Li <szli@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch fixes spaces before commas issue in coding style.
Signed-off-by: NUjjal Roy <royujjal@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

We recently added an indent level here but missed this line.  It needs
another tab.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Current firmware dump solution support w8897 chipset, this
patch extend the exist framework with support for w8997
chipset.

Trigger firmware dump using,
cat /sys/kernel/debug/mwifiex/mlan0/device_dump,
data can be obtain by
cat /sys/class/devcoredump/devcd*/data > data.txt after that.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Firmware dump operation takes few seconds. Hence it's
important to notify user in dmesg that firmware dump
has started or completed.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch increase firmware dump memory 4K each time, until
meet the demand.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch apply an extensible firmware dump framework,
so that other chipset can be easily added as needed.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

If we are not able to read registers or PCIe memory,
it means PCIe device is in bad state. We will skip
firmware dump in this case.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

It is observed that ioread32 may fail to read pcie register
in certain scenarios, this patch handles these cases.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

It's been observed that driver's power state goes out
of sync with firmware in some corner cases. When this
happens, driver tries to download the data to firmware
assuming it's awake which causes Tx data timeout.

Main thread will process interrupt as soon as interrupt
handler fills 'int_status' variable.

This patch fixes the race issue by updating 'int_status'
at the end of mwifiex_interrupt_status().
Signed-off-by: NShengzhen Li <szli@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Newer pcie chipsets (8997 onwards) support MSIx. This
patch enables it.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Same chip is being used by WLAN as well as bluetooth
drivers. Each driver needs to check during initialisation
if firmware is already active or it needs to be freshly
downloaded. If one driver has started downloading the
firmware, other finds the winner flag as false.

mwifiex_check_fw_status() checks firmware status and also
check if WLAN is the winner for firmware downloading.

Once we detect that other interface is downloading
the firmware, we call this routine again with max
poll count to wait until firmware is ready.

This patch splits the routine to avoid checking
winner status unnecessarily multiple times and ensures
that correct messages are displayed to user.

Firmware status poll count is also increased to 150.
Signed-off-by: NChunfan Chen <jeffc@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch increase the priority for some critical
messages.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Some critical messages are missed until "adapter->dev"
gets initialized in mwifiex_register_dev().
We will use pr_* print message instead of mwifiex_dbg at
those places to resolve the problem.
Signed-off-by: NXinming Hu <huxm@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Newer pcie devices (8897 onwards) support MSI. This
patch enables it.
Signed-off-by: NAvinash Patil <patila@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Part of reorganising wireless drivers directory and Kconfig.
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Preallocated PCIe buffer is being reused for all PCIe interface
events. Physical address of the buffer is shared with firmware
so that it can perform DMA on it. As event length is specified
in the header, there should not be a problem if the buffer gets
overwritten.
We will save some cycles by avoiding memset everytime while
submitting the buffer to firmware.

Fixes: 2728cecd(mwifiex: corrections in PCIe event skb)
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This patch adds support for 8997 chipset to mwifiex
with SDIO/PCIe/USB interface.

The corresponding firmware image files are located in:
"mrvl/sd8997_uapsta.bin"
"mrvl/pcie8997_uapsta.bin"
"mrvl/usb8997_uapsta.bin"
Signed-off-by: NZhaoyang Liu <liuzy@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Preallocated event SKBs are getting reused for PCIe chipset.
Their physical addresses are shared with firmware so that
firmware can write data into them.

This patch makes sure that SKB is cleared and length is set to
default while submitting it to firmware.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NZhaoyang Liu <liuzy@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Currently device dump generated in the driver is retrieved
using ethtool set/get dump commands. We will get rid of
ethtool approach and use devcoredump framework.

Device dump can be trigger by
cat /debugfs/mwifiex/mlanX/device_dump
and when the dump operation is completed, data can be read by
cat /sys/class/devcoredump/devcdX/data

We have prepared following script to split device dump data
into multiple files.

 [root]# cat mwifiex_split_dump_data.sh
 #!/bin/bash
 # usage: ./mwifiex_split_dump_data.sh dump_data

 fw_dump_data=$1

 mem_type="driverinfo ITCM DTCM SQRAM APU CIU ICU MAC"

 for name in ${mem_type[@]}
 do
     sed -n "/Start dump $name/,/End dump/p" $fw_dump_data  > tmp.$name.log
     if [ ! -s tmp.$name.log ]
     then
         rm -rf tmp.$name.log
     else
         #Remove the describle info "Start dump" and "End dump"
         sed '1d' tmp.$name.log | sed '$d' > /data/$name.log
         if [ -s /data/$name.log ]
         then
             echo "generate /data/$name.log"
         else
             sed '1d' tmp.$name.log | sed '$d' > /var/$name.log
             echo "generate /var/$name.log"
         fi
         rm -rf tmp.$name.log
     fi
 done
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Currently we are dumping driver information also inside
firmware dump API. We will call it as device dump and
dump driver and firmware data separately.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Currently we are dumping driver information only for SDIO
interface. This patch adds missing mwifiex_dump_drv_info()
call for PCIe interface.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NCathy Luo <cluo@marvell.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>