All boards supported by this driver could work using PIO or MMIO for accessing
registers.
This driver tries to access HW by using MMIO, and, if this fails for somewhat
reason, the driver tries to fall back to PIO mode.
MMIO-mode is straightforward on all boards.
PIO-mode is straightforward on rtl8180 only.
On rtl8185 and rtl8187se boards not all registers are directly available in PIO
mode (they are paged).
On rtl8185 there are two pages and it is known how to switch page.
PIO mode works, except for only one access to a register out of default page,
recently added by me in the initialization code with patch:
rtl818x_pci: Fix rtl8185 excessive IFS after CTS-to-self
This can be easily fixed to work in both cases (MMIO and PIO).
On rtl8187se, for a number of reasons, there is much more work to do to fix PIO
access.
PIO access is currently broken on rtl8187se, and it never worked.
This patch fixes the said register write for rtl8185 and makes the driver to
fail cleanly if PIO mode is attempted with rtl8187se boards.
While doing this, I converted also a couple of printk(KERN_ERR) to dev_err(), in
order to make checkpatch happy.
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Currently the driver configures mac80211 to provide two rates for each TX frame:
One initial rate and one alternate fallback rate, each one with its retry count.
HW does not support fully this: rtl8180 doesn't have support for rate scaling at
all, and rtl8185/rtl8187SE supports it in a way that does not fit with mac80211:
The HW does automatically fall back to the next lower rate, and only a lower
limit can be specified, so the HW may TX also on rates in between the two rates
specified by mac80211. Furthermore only the total TX retry count can be
specified for each packet, while the number of TX attempts before scaling rate
can be configured only globally (not per each packet).
Currently the driver sets the HW auto rate fallback mechanism to quickly scale
rate after a couple of retries, and it uses the alternate rate requested by
mac80211 as fallback limit rate (and it does this even wrongly).
The HW indeed will behave differently than what mac80211 mandates, that is
probably undesirable, and the reported TX retry count may not refer to what
mac80211 thinks, and this could fool mac80211.
This patch makes the driver to declare to mac80211 to support only one rate
configuration for each packet, and it does disable the HW auto rate fallback
mechanism, relying only on SW and letting mac80211 to do all by itself.
This should ensure correct operation and fairness respect to mac80211.
Indeed here tests with iperf do not show significant performance differences.
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
HW is programmed with wrong retry count value for TX:
Mac80211 passes to driver the number of times the TX should be attempted.
The HW, instead, wants the number of time the TX should be retried if it fails
the first time (assuming we have to TX it at least one time).
This patch correct this.
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Rtl8187se support has been added to the rtl818x_pci driver by extracting a lot
of information from a rtl8187se Linux staging driver included in the kernel at
the time rtl8187se support was added.
The rtl818x_pci main file has a comment that advertises this.
Recently this staging driver has been removed from the kernel, but I still feel
it can be useful as "reference" code (in case of bugs, or to implement
improvements in rtl818x_pci driver).
This one-line patch adds a comment in rtl818x_pci driver to point people
searching for that "reference code" to the last kernel version still containing
it (3.14).
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Measuring time between _end_ of CTS-to-self and _end_ of datapacket (with a
prism54 board and mac80211 hacked to let the MAC timestamp stay untouched in the
radiotap header) resulted in about 300uS, while the datapacket itself should be
by far shorter (less than 100uS) and IFS should be SIFS (10uS).
This measure was confirmed whith a scope: about 250uS IFS has been seen between
the two packets.
This situation causes the CTS-to-self protection mechanism to work incorrectly
due to the NAV expiring during, or even before beginning, the packet
transmission, and it also causes the performances to be anyway reduced due to
time waste.
This problem has been seen at every packet TXed with CTS-to-self enabled on
rtl8185 board.
rtl8187se seems not affected (and rtl8180, being a 802.11b card, does not have
CTS-to-self mechaninsm).
This patch fixes this by adding a magic register write, making the board wait
for correct SIFS after CTS-to-self packet.
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
BSSID register was written with six byte-writes.
It seems that, similarly to what happens with MAC registers, they needs to be
written with one 16-bit and one 32-bit writes, otherwise the write does not work.
The byte write didn't work only on my rtl8185, while it worked on rtl8180 and
rtl8187se, BTW since there are probably a number of different ASIC revisions out
of there, I let the change to affect all cards.
It shouldn't hurt anyway.
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
LCNXN is simply a continuation of N, e.g. code handling LCNXN revs 0 and
1 is mostly the same as for N-PHY revs 7+.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Fix checkpatch warning:
WARNING: kfree(NULL) is safe this check is probably not required
Cc: Stanislav Yakovlev <stas.yakovlev@gmail.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The patch fixes a couple of issues:
- absence of deallocation of rsi_dev->rx_usb_urb[0] in the driver;
- potential NULL pointer dereference because of lack of checks for memory
allocation success in rsi_init_usb_interface().
By the way, it makes rsi_probe() returning error code instead of 1
and fixes comments regarding returning values.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Right now sleep duration is configured as beacon interval. It should be
the multiple of beacon interval by listen period which helps to
reduce station power consumption.
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Earlier the listen interval is used to decide switching between
operating and off-channels during bgscan and to improve throughput,
the listen interval is reduced to 1. After optimiztion in scan
state machine, listen period is not used for decision making and
hence reverting it back to original value.
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The beacon configurations are not cached properly after the station
associates with AP. Not handling BEACON_INFO, is failing to update
dtim period and also it is causing below warning message.
WARNING: CPU: 1 PID: 0 at drivers/net/wireless/ath/ath9k/recv.c:548
ath_rx_tasklet+0xc89/0xca0 [ath9k]()
Call Trace:
[<c14669c9>] dump_stack+0x48/0x69
[<c104f1a2>] warn_slowpath_common+0x82/0xa0
[<fd38c2f9>] ? ath_rx_tasklet+0xc89/0xca0 [ath9k]
[<fd38c2f9>] ? ath_rx_tasklet+0xc89/0xca0 [ath9k]
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Treat frames that underwent a CCK or OFDM restart as frames with an invalid CRC.
Signed-off-by: Mathy Vanhoef <vanhoefm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
When the FIF_FCSFAIL filter flag is set, pass frames with CRC errors.
Signed-off-by: Mathy Vanhoef <vanhoefm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The PPS signal is not correct, as it generates a one half HZ clock
signal, as it only generates one level change per second. To generate a
full clock, we need two level changes per second. Also, change the name
of the #define, in order to prevent confusion between it and
NSEC_PER_SEC which is not guaranteed to be a 64bit value.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Call igb_setup_link() when the PHY is powered up.
Signed-off-by: Todd Fujinaka <todd.fujinaka@intel.com>
Reported-by: Jeff Westfahl <jeff.westfahl@ni.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Add a slash to the branding string to reduce confusion and match up with
our other marketing materials.
Change-ID: I8229e8c3e43083b7a29c859a250f8d2d4dc46b9e
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
We don't need the export.h header so we can just go ahead and remove it.
Change-ID: I9057396b141ee449d8299409081358b9270a7c4d
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Prevent writing to reserved bits, queue index is 0-127
Change-ID: Ic923e1c92012a265983414acd8f547c4bdac2e34
Signed-off-by: Christopher Pau <christopher.pau@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Driver needs to initialize all members of context descriptor. Stale
data is possible otherwise.
Change-ID: Idc6b53af45583509da42d5ec0824cbaf78aee64f
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
With the auto_disable flags added there was a bug that was causing the
replay logic to not work correctly.
This patch fixes the issue so that we call a replay after a sideband
reset correctly.
Change-ID: I005fe1ac361188ee5b19517a83c922038cba1b00
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Add new variable defining ASQ command write back timeout to allow for
dynamic modification of this timeout. Initialize it on AQ initialize
routine with default value, vary it on device ID.
Change-ID: I5c9908f9d7c5455634353b694a986d6f146d1b9d
Signed-off-by: Kamil Krawczyk <kamil.krawczyk@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
In some circumstances, the firmware could beat us to the punch, and the
reply from the PF would come back before we were able to properly modify
the aq_pending and aq_required flags. This would mess up the flags and
put the driver in an indeterminate state, much like Schrödinger's cat.
However, unlike the cat, the driver is definitely dead.
To fix this, simply set the flags before sending the request to the AQ.
This way, it won't matter if the interrupt comes back too soon.
Change-ID: I9784655e475675ebcb3140cc7f36f4a96aaadce5
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Make mask value of all 1s. Value of -1 can't be used for u32 type.
Change-ID: I49d58b77639939fe7447a229dbf1f4a1bf7419ce
Signed-off-by: Kevin Scott <kevin.c.scott@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Per a recent HW designer comment, this code is for ripping through the
queues and interrupts to fully disable them on driver init, specifically
to help clean up after a PXE or other early boot activity.
Change-ID: I32ed452021a1c2b06dace1969976f882a37b9741
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Clear the AQ BAH and BAL registers on a clean shutdown to help make sure
all is tidy when the driver is done.
Change-ID: I393e92680247daa52a8e00bab183213672d73578
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Add the Base Address High and Low to the admin queue struct to simplify
another bit of "which context" logic in the config routines.
Change-ID: Iae195a7da3baffc1a9d522119e1e2b427068ad07
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Jeff Kirsher says:
====================
Intel Wired LAN Driver Updates 2014-06-26
This series contains updates to i40e and i40evf.
Kamil provides a cleanup patch to i40e where we do not need to acquire the
NVM for shadow RAM checksum calculation, since we only read the shadow RAM
through SRCTL register.
Paul provides a fix for handling HMC for big endian architectures for i40e
and i40evf.
Mitch provides four cleanup and fixes for i40evf. Fix an issue where if
the VF driver fails to complete early init, then rmmod can cause a softlock
when the driver tries to stop a watchdog timer that never got initialized.
So add a check to see if the timer is actually initialized before stopping
it. Make the function i40evf_send_api_ver() return more useful information,
instead of just returning -EIO by propagating firmware errors back to the
caller and log a message if the PF sends an invalid reply. Fix up a log
message that was missing a word, which makes the log message more readable.
Fix an initialization failure if many VFs are instantiated at the same time
and the VF module is autoloaded by simply resending firmware request if
there is no response the first time.
Jacob does a rename of the function i40e_ptp_enable() to
i40e_ptp_feature_enable(), like he did for ixgbe, to reduce possible
confusion and ambugity in the purpose of the function. Does follow on
PTP work on i40e, like he did for ixgbe, by breaking the PTP hardware
control from the ioctl command for timestamping mode. By doing this,
we can maintain state about the 1588 timestamping mode and properly
re-enable to the last known mode during a re-initialization of 1588 bits.
Anjali cleans up the i40e driver where TCP-IPv4 filters were being added
twice, which seems to be left over from when we had to add two PTYPEs for
one filter. Fixes the flow director sideband logic to detect when there
is a full flow director table. Also fixes the programming of FDIR where
a couple of fields in the descriptor setup that were not being
programmed, which left the opportunity for stale data to be pushed as
part of the descriptor next time it was used.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
MSI-X should use PCI_MSIX_FLAGS not PCI_MSI_FLAGS.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Checkpatch issued a warning preferring to use kstrto<type> when
using a single variable sscanf. Change the sscanf invocation to
a kstrtouint call.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently the driver makes use of the additional mac address
registers in the hardware to provide perfect filtering. The
hardware can also have a set of hash table registers that can
be used for imperfect filtering. By using imperfect filtering
the additional mac address registers can be used for layer 2
filtering support. Use the hash table registers if the device
has them.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds support for (imperfect) filtering of
VLAN tag ids using a 16-bit filter hash table. When
VLANs are added, a 4-bit hash is calculated with the
result indicating the bit in the hash table to set.
This table is used by the hardware to drop packets with
a VLAN id that does not hash to a set bit in the table.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When receiving a VLAN packet check to be sure that VLAN
RX CTAG stripping is enabled before indicating that the
tag has been stripped in the packet information data
structure.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The MAC_VLAN_Incl register (0x0060) must be set to indicate
that the VLAN tag to be inserted comes from a Tx context
descriptor and not the MAC_VLAN_Incl register. Also, even
though it is the default, explicitly set the type of tag to
be inserted as a CTAG.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In order to avoid conflicts with other include files, add
a prefix to the defines in xgbe.h.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There were a couple of fields in the fdir descriptor setup that
were not being reprogrammed, which left the opportunity for stale
data to be pushed as part of the descriptor next time it was used.
Change-ID: Ieee5c96a7d4713d469693f086c4854de949a7633
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
"fd current cnt" can be used to print the total filters consumed
by this interface, this includes guaranteed and best effort filters.
Change-ID: I2c417810c4999ce1388d2ea26f8e69679ba33966
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Hardware does not have a way of telling a PF how much of the global
shared FD table space is still available or is consumed.
Previously, every PF but PF0 would think there was still space available
when there wasn't. The PFs would continue to try to add filters and fail.
With this new logic if a filter programming error is detected we just
check if we are close to the guaranteed space full and that can be used
as a hint to say, there might not be space and we should turn off the
features. This way we can turn off the feature in SW for all PFs in
time.
Change-ID: I725cb2fab16c033f883056362b4542c1400503c5
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
There wasn't a need to play the logic twice, it seems
like a left over from when we had to add two PTYPEs for
one filter. There should be no change in the number of
filters that actually got added to the hardware.
Change-ID: I5071d02eafd020b60e30eb96219f110f334eec85
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Currently every time we run through the i40e_ptp_init routine, we create
a new device node. This function is called by i40e_reset_and_rebuild
which is used to handle reset of the device. Even though the 1588
registers only get cleared on a GLOBAL reset, this function is still
called to handle a CORE reset.
This causes a leak of PTP device nodes at every reset. To fix this,
break PTP device clock node creation out of i40e_ptp_init, and only call
this if we don't already have a device created. Further invocation of
i40e_ptp_init will not generate new PTP devices. Instead, only the
necessary work required to reconfigure 1588 will be done.
This change also fixes an issue where a reset can cause the
device to forget it's timestamp configuration, and revert to the default
mode.
Change-ID: I741d01c61d9fe1d24887859d1316e1a8a892909e
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This patch prevents the SIOCGHWTSTAMP ioctl from possibly returning bad
data, by not permanently storing the setting into the private
structure until after we've finished validating that we can support it.
Change-ID: Ib59f9b4f73f451d5a2e76fb8efa5d4271b218433
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This patch facilitates future work by breaking the PTP hardware control
bits out of the i40e_set_ts_config function. By doing this, we can
maintain state about the 1588 timestamping mode and properly re-enable
to the last known mode during a re-initialize of 1588 bits.
This patch also modifies i40e_ptp_init to call the
i40e_ptp_set_timestamp_mode during the reconfiguration process. A
future patch will ensure that the hwtstamp_config structure is not reset
during this process, so that timestamp mode will be maintained across a
reset.
Change-ID: Ic20832c96c5c512ac203b6c7534e10d891c560f0
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Reduces possible confusion and ambiguity in purpose of the ancillary
feature control entry point function.
Change-ID: I21d773c1a86878f6d061505185b596c788d1b7cc
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Sometimes the firmware will not indicate an error but fail to pass a
message between the VF and the PF driver. If this happens, just resend
the request.
This fixes an initialization failure if many VFs are instantiated at the
same time and the VF module is autoloaded.
Change-ID: Idd1ad8da2fd5137859244685c355941427d317d7
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Correct a missing word in a log message.
Change-ID: Id94da7d9f842382d073b3947e0b616503e2f8e91
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
When verifying the API version (which is the first time the driver
communicates with the firmware and thus the PF driver), there are many
ways in which a failure can occur. There may be an error from the
firmware, there may be unresponsive firmware, there may be an error from
the PF driver, etc, etc.
Make this function return more useful information, instead of just -EIO.
Propagate FW errors back to the caller, and log a message if the PF
sends an invalid reply.
Change-ID: I3e9135a2b80f7acdb855f62f12b2b2668c9a8951
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
