Commit Graph

98 Commits

Author SHA1 Message Date
Edward Cree 267d9d7387 sfc: Cope with permissions enforcement added to firmware for SR-IOV
* Accept EPERM in some simple cases, the following cases are handled:
1) efx_mcdi_read_assertion()
Unprivileged PCI functions aren't allowed to GET_ASSERTS.
We return success as it's up to the primary PF to deal with asserts.
2) efx_mcdi_mon_probe() in efx_ef10_probe()
Unprivileged PCI functions aren't allowed to read sensor info, and
worrying about sensor data is the primary PF's job.
3) phy_op->reconfigure() in efx_init_port() and efx_reset_up()
Unprivileged functions aren't allowed to MC_CMD_SET_LINK, they just have
to accept the settings (including flow-control, which is what
efx_init_port() is worried about) they've been given.
4) Fallback to GET_WORKAROUNDS in efx_ef10_probe()
Unprivileged PCI functions aren't allowed to set workarounds. So if
efx_mcdi_set_workaround() fails EPERM, use efx_mcdi_get_workarounds()
to find out if workaround_35388 is enabled.
5) If DRV_ATTACH gets EPERM, try without specifying fw-variant
Unprivileged PCI functions have to use a FIRMWARE_ID of 0xffffffff
(MC_CMD_FW_DONT_CARE).
6) Don't try to exit_assertion unless one had fired
Previously we called efx_mcdi_exit_assertion even if
efx_mcdi_read_assertion had received MC_CMD_GET_ASSERTS_FLAGS_NO_FAILS.
This is unnecessary, and the resulting MC_CMD_REBOOT, even if the
AFTER_ASSERTION flag made it a no-op, would fail EPERM for unprivileged
PCI functions.
So make efx_mcdi_read_assertion return whether an assert happened, and only
call efx_mcdi_exit_assertion if it has.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:48 -04:00
Shradha Shah 7b8c7b54f0 sfc: manually allocate and free vadaptors
To be able to use MC_CMD_VADAPTOR_SET_MAC, vadaptors must be
manually allocated and freed as automatic vadaptors will disappear
when their reference_count reaches zero, which must happen before
the MAC address is changed.

Vadaptors are allocated and freed in the vswitching_probe/remove
functions for PFs and VFs, and this means that vadaptors are restored
correctly following an MC reboot or other reset when required.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:48 -04:00
Shradha Shah 02246a7f96 sfc: Prepare to bind the sfc driver to the VF.
Added efx_nic_type structure for VF.
Mapped a different BAR for VF as it uses BAR 0 for memory.
Added functions sriov_init and sriov_fini.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:47 -04:00
Daniel Pieczko 1cd9ecbbe6 sfc: get the PF number and record in nic_data
Use MC_CMD_GET_FUNCTION_INFO to record the PF number in nic_data.
This will be needed when assigned vports to VFs.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:47 -04:00
Daniel Pieczko 6d8aaaf6f7 sfc: create VEB vswitch and vport above default firmware setup
Adds functions to allocate and free vswitches and vports; vadaptors
are automatically allocated and freed when TX/RX queues are
initialised and finalised.  This vswitching structure is only created
if the firmware supports it, so a check that full-featured firmware
is running is performed first.

If the MC resets, the vswitching infrastructure will need to be
recreated, so mark the "must_probe_vswitching" flag when an MC reboot
is detected.

Don't try to create a vswitch if vf-count=0

This allocation of vswitches and vports does not currently support
configuring VLAN tags, but that can be added in a future change.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:47 -04:00
Daniel Pieczko 45b2449e3f sfc: record the PF's vport ID in nic_data
The default port ID of EVB_PORT_ID_ASSIGNED is a "magic" number
for the MCFW to select the physical port of the PF.  If other
vswitches and vports are created on top of the default firmware
configuration, the ID of the newly created vport is then required
when passed to MCDI commands.  Currently, this doesn't happen so
the vport_id is never changed, but a subsequent patch will change
this behaviour so that other vswitches and vports are created.

The vport_id recorded in nic_data is only relevant for PFs.
VFs will have their vports created by their parent PF, and in
that case the parent PF will record the vport ID of each VF.
For a VF, nic_data->vport_id is expected to remain at the default
value.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:47 -04:00
Daniel Pieczko 8d9f9dd448 sfc: Record [rt]x_dpcpu_fw_id in EF10 nic_data
The (future) code to add/remove vswitches and vports will be
dependent on the firmware variant.
To simplify the checking of the firmware variant, record
values for rx_dpcpu_fw_id and tx_dpcpu_fw_id in EF10 nic_data.

There was only one place where this was previously used:
efx_mcdi_print_fwver() in ethtool.c.
The MC_CMD_GET_CAPABILITIES can be replaced and the values from
nic_data used instead.

Note that the printing of "?" if the MC command fails or if the
outlength is incorrect no longer apply, because errors are returned
in efx_ef10_init_datapath_caps() in both of these cases.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:47 -04:00
Shradha Shah e3d3629387 sfc: Use MCDI to set FILTER_OP_IN_TX_DOMAIN
The TX_DOMAIN field is currently reserved but its safer to set
it to 0 for future compatibility.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:46 -04:00
Shradha Shah 834e23dd0a sfc: Enable VF's via a write to the sysfs file sriov_numvfs
This patch adds support for the use of sriov_configure on EF10
to enable Virtual Functions while the driver is loaded.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:46 -04:00
Shradha Shah 7fa8d54704 sfc: Own header for nic-specific sriov functions, single instance of netdev_ops and sriov removed from Falcon code
By putting all the efx_{siena,ef10}_sriov_* declarations in
{siena,ef10}_sriov.h, ensure they cannot be called from nic-generic code.
Also fixes up an instance of this, where mcdi.c was calling
efx_siena_sriov_flr.

The single instance of netdev_ops should call general high level
functions that can then call something adapter specific in efx_nic_type.
We should only do adapter specialisation via efx_nic_type.

Removal of sriov functionality from the Falcon code means that tests
are needed for the presence of some callbacks.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09 16:16:46 -04:00
David S. Miller 4e84b496fd Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-11-06 22:01:18 -05:00
Shradha Shah d98a4ffe0d sfc: Add NIC type operations to replace direct calls from efx.c into siena_sriov.c
Also add dummy functions where required to avoid NULL pointer dereference.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-06 14:43:09 -05:00
Edward Cree 9fd3d3a430 sfc: don't BUG_ON efx->max_channels == 0 in probe
efx_ef10_probe() was BUGging out if the BAR2 size was 0.  This is
 unnecessarily violent; instead we should just fail to probe the device.
Kept a WARN_ON as this problem indicates a broken or misconfigured NIC.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-03 15:57:50 -05:00
Edward Cree e4d112e4f9 sfc: add extra RX drop counters for nodesc_trunc and noskb_drop
Added a counter rx_noskb_drop for failure to allocate an skb.
Summed the per-channel rx_nodesc_trunc counters earlier so that they can
 be included in rx_dropped.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-15 22:53:34 -07:00
Edward Cree e283546c04 sfc:On MCDI timeout, issue an FLR (and mark MCDI to fail-fast)
When an MCDI command times out (whether or not we find it
completed when we poll), call efx_mcdi_abandon(), which tells
all subsequent MCDI calls to fail-fast, and queues up an FLR.

Because an FLR doesn't lead to receiving any reboot even from
the MC (unlike most other types of reset), we have to call
efx_ef10_reset_mc_allocations.
In efx_start_all(), if a reset (of any kind) is pending, we
bail out.
Without this, attempts to reconfigure (e.g. change mtu) can
cause driver/mc state inconsistency if the first MCDI call
triggers an FLR.

For similar reasons, on EF10, in
efx_reset_down(method=RESET_TYPE_MCDI_TIMEOUT), set the number
of active queues to zero before calling efx_stop_all().
And, on farch, in efx_reset_up(method=RESET_TYPE_MCDI_TIMEOUT),
set active_queues and flushes pending & outstanding to zero.

efx_mcdi_mode_{poll,event}() should not take us out of fail-fast
 mode. Instead, this is done by efx_mcdi_reset() after the FLR
completes.

The new FLR reset_type RESET_TYPE_MCDI_TIMEOUT doesn't really
fit into the hierarchy of reset 'scopes' whereby efx_reset()
decides some resets subsume others.  Thus, it uses separate logic.

Also, fixed up some inconsistency around RESET_TYPE_MC_BIST,
which was in the wrong place in that hierarchy.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 14:33:57 -04:00
Daniel Pieczko 52ad762b85 Call efx_set_channels() before efx->type->dimension_resources()
When using the "separate_tx_channels=1" module parameter, the TX queues are
initially numbered starting from the first TX-only channel number (after all the
RX-only channels).  efx_set_channels() renumbers the queues so that they are
indexed from zero.

On EF10, the TX queues need to be relabelled in this way before calling the
dimension_resources NIC type operation, otherwise the TX queue PIO buffers can be
linked to the wrong VIs when using "separate_tx_channels=1".

Added comments to explain UC/WC mappings for PIO buffers

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-01 16:25:51 -04:00
Eric W. Biederman 75363a4676 sfc: Don't receive packets when the napi budget == 0
Processing any incoming packets with a with a napi budget of 0
is incorrect driver behavior.

This matters as netpoll will shortly call drivers with a budget of 0
to avoid receive packet processing happening in hard irq context.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:52:48 -04:00
Edward Cree cd84ff4da1 sfc: Use ether_addr_copy and eth_broadcast_addr
Faster than memcpy/memset on some architectures.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-10 13:53:37 -04:00
Ben Hutchings aa3930ee8c sfc: Correct comment about number of TX queues used on EF10
EF10 implements option descriptors to switch TX checksum offload
on and off between packets.  We could therefore use a single
hardware TX queue per kernel TX queue, although we don't yet.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-12 17:53:34 -05:00
Jon Cooper 3e336261f8 sfc: Change efx_mcdi_reset_port to use ENTITY_RESET MC command.
PORT_RESET MC command was NOP in the ef10 firmware hence we are using
ENTITY_RESET to make sure all resource allocations are reset.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-21 14:46:12 -08:00
Ben Hutchings a0bc3487e4 sfc: Fix RX drop filters for EF10
When we insert an filter, the firmware checks that the given RX queue
index is in range even if it will not be used.  In case we're
inserting a drop filter, pass the value 0.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-16 19:01:27 +00:00
Shradha Shah 79ac47ae74 sfc: Changed the statistic name emerg_{fetch,wait} to hlb_{fetch,wait}
The original names are unnecessarily alarming.  Head-of-line blocking
is not an emergency.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:29 +00:00
Ben Hutchings fbd791202b sfc: Implement efx_nic_type::filter_clear_rx operation for EF10
The operation can now fail, so change its return type to int.

Remove the inline wrapper while we're changing the signature.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:25 +00:00
Ben Hutchings f72848021d sfc: Allow filter removal only with exactly matching priority
Currently a higher priority client can remove a lower priority
client's filter with equal match-expression.  This might happen if (a)
the higher priority client has a double-free bug, or (b) another
client with sufficient priority replaced and then removed an equal
filter, allowing the low priority client to insert an equal filter.

In neither case does it actually make sense to carry out the removal;
we should say the filter doesn't exist, as the filter currently
present is not the one that the high-priority client is referring to.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:24 +00:00
Ben Hutchings b59e6ef87c sfc: Don't refer to 'stack' in filter implementation
Change all the 'stack' naming to 'auto' (or other meaningful term);
the device address list is based on more than just what the network
stack wants, and the no-match filters aren't really what the stack
wants at all.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:23 +00:00
Ben Hutchings 7665d1abea sfc: Change priority and flags for automatic MAC filters
MAC filters inserted automatically by the driver, based on the device
address list (EF10) or no-match filters (Siena), should be overridable
at MANUAL or REQUIRED priority.  Currently they themselves have
REQUIRED priority and this requires some odd special-casing.

We also can't reliably tell whether such a MAC filter has or has
not been overridden.  We just remember that it is wanted by the
stack (RX_STACK flag).

Add another priority level, AUTO, between HINT and MANUAL, and
use this for the automatic filters while they have not been
overridden.  Remove the RX_STACK flag.  Add an RX_OVER_AUTO
flag which is set only when an AUTO filter has been overridden
(or was requested to be inserted while a higher-priority filter
existed).

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:22 +00:00
Andrew Rybchenko d43050c0c7 sfc: Change efx_nic_type::rx_push_indir_table to push hash key as well
The EF10 implementation already does this, and it makes more logical
sense to group the RSS hash key and indirection table together.
Rename the operation to rx_push_rss_config.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:21 +00:00
Ben Hutchings 48ce5634a7 sfc: Add more information to many warnings using WARN() and netdev_WARN()
In case of certain hardware and firmware errors it can be useful to
have more context than just the file and line number.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:20 +00:00
Ben Hutchings 9aecda95d0 sfc: Enable PTP clock and timestamping for all functions on EF10
The SFC9100 family has only one clock per controller, shared by all
functions.  Therefore only create a clock device under the primary
function, and make all other functions refer to the primary's clock
device.

Since PTP functionality is limited to port 0 and PF 0 on the earlier
SFN[56]322F boards, and we also set the primary flag for that
function, we can make the creation of a clock device conditional only
on this flag.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:16 +00:00
Jon Cooper bd9a265db2 sfc: Add RX packet timestamping for EF10
The EF10 firmware can optionally insert RX timestamps in the packet
prefix.  These only include the clock minor value.  We must also
enable periodic time sync events on each event queue which provide
the high bits of the clock value.

[bwh: Combined and rebased several changes.
 Added the above description and some sanity checks for inline vs
 separate timestamps.
 Changed efx_rx_skb_attach_timestamp() to read the packet prefix
 from the skb head area.]
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:13 +00:00
Ben Hutchings 065e64c4b2 sfc: Return EBUSY for filter insertion on EF10, matching Falcon/Siena
The MC firmware will return error MC_CMD_ERR_ENOSPC if filter
insertion fails due to lack of resources.  The net driver's filter
implementation for Falcon-architecture returns EBUSY.  They should
behave consistently, so for EF10 change ENOSPC to EBUSY.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:07:00 +00:00
Ben Hutchings a84f3bf909 sfc: Expose NVRAM_PARTITION_TYPE_LICENSE on EF10
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:06:59 +00:00
Edward Cree 1e0b8120b2 sfc: Log all unexpected MCDI errors
Split each of efx_mcdi_rpc, efx_mcdi_rpc_finish, and efx_mcdi_rpc_async into
a normal and a _quiet version; made the former log MCDI errors with
netif_err (and include the raw MCDI error code), and the latter never log
them at all.  Changed various callers; any where some errors are expected
(but others are not) call the _quiet version and then if necessary log the
MCDI error themselves.  Said logging is done by new efx_mcdi_display_error.

Callers of efx_mcdi_rpc*_quiet functions which may want to log the error
need to ensure that their outbuf is big enough to hold an MCDI error; to
this end, they now use MCDI_DECLARE_BUF_OUT_OR_ERR, which always allocates
at least 8 bytes.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:06:56 +00:00
Jon Cooper f8f3b5ae3e sfc: Correct RX dropped count for drops while interface is down
We don't directly control RX ingress on Siena or any later
controllers, and so we cannot prevent packets from entering the RX
datapath while the RX queues are not set up.  This results in
the hardware incrementing RX_NODESC_DROP_CNT, but it's not an
error and we should not include it in error stats.

When bringing an interface up or down, pull (or wait for) stats and
count the number of packets that were dropped while the interface was
down.  Subtract this from the reported RX dropped count.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:06:51 +00:00
Jon Cooper cce28794bc sfc: Make initial fill of RX descriptors synchronous
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:06:50 +00:00
Ben Hutchings 92a0416839 sfc: Tighten the check for RX merged completion events
The addition of RX event merging support means we don't reliably
detect dropped RX events now.  Currently we will only detect them if
the previous event for the RX queue had the CONT bit set.

Only accept RX completion events as merged if the
GET_CAPABILITIES_OUT_RX_BATCHING bit is set in datapath_caps (which it
won't be for the low-latency datapath) and the CONT bit is not set on
the event.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:06:49 +00:00
Jon Cooper 74cd60a4d7 sfc: Add MC BISTs to ethtool offline self test on EF10
To run BISTs the MC goes down in to a special mode where it will only
respond to MCDI from the testing PF, and TX, RX and event queues are
torn down. Other PFs get a message as it goes down to tell them it's
going down.

When the other PFs get this message, they check the soft status
register to tell when the MC has rebooted after BIST mode and they can
start recovery.

[bwh: Convert the test result to 1 or -1 as for earlier NICs]
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12 22:05:48 +00:00
David S. Miller 53af53ae83 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	include/linux/netdevice.h
	net/core/sock.c

Trivial merge issues.

Removal of "extern" for functions declaration in netdevice.h
at the same time "const" was added to an argument.

Two parallel line additions in net/core/sock.c

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-08 23:07:53 -04:00
Edward Cree 568d7a001b sfc: Add PM and RXDP drop counters to ethtool stats
Recognise the new Packet Memory and RX Data Path counters.

The following counters are added:
rx_pm_{trunc,discard}_bb_overflow - burst buffer overflowed.  This should not
 occur if BB correctly configured.
rx_pm_{trunc,discard}_vfifo_full - not enough space in packet memory.  May
 indicate RX performance problems.
rx_pm_{trunc,discard}_qbb - dropped by 802.1Qbb early discard mechanism.
 Since Qbb is not supported at present, this should not occur.
rx_pm_discard_mapping - 802.1p priority configured to be dropped.  This should
 not occur in normal operation.
rx_dp_q_disabled_packets - packet was to be delivered to a queue but queue is
 disabled.  May indicate misconfiguration by the driver.
rx_dp_di_dropped_packets - parser-dispatcher indicated that a packet should be
 dropped.
rx_dp_streaming_packets - packet was sent to the RXDP streaming bus, ie. a
 filter directed the packet to the MCPU.
rx_dp_emerg_{fetch,wait} - RX datapath had to wait for descriptors to be
 loaded.  Indicates performance problems but not drops.

These are only provided if the MC firmware has the
PM_AND_RXDP_COUNTERS capability.  Otherwise, mask them out.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-10-04 23:56:31 +01:00
Edward Cree 4bae913bd3 sfc: Refactor EF10 stat mask code to allow for more conditional stats
Previously, efx_ef10_stat_mask returned a static const unsigned long[], which
meant that each possible mask had to be declared statically with
STAT_MASK_BITMAP.  Since adding a condition would double the size of the
decision tree, we now create the bitmask dynamically.

To do this, we have two functions efx_ef10_raw_stat_mask, which returns a u64,
and efx_ef10_get_stat_mask, which fills in an unsigned long * argument.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-10-04 23:31:51 +01:00
Jon Cooper d546a89362 sfc: Add rmb() between reading stats and generation count to ensure consistency
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-10-04 23:31:50 +01:00
Ben Hutchings 183233bec8 sfc: Allocate and link PIO buffers; map them with write-combining
Try to allocate a segment of PIO buffer to each TX channel.  If
allocation fails, log an error but continue.

PIO buffers must be mapped separately from the NIC registers, with
write-combining enabled.  Where the host page size is 4K, we could
potentially map each VI's registers and PIO buffer separately.
However, this would add significant complexity, and we also need to
support architectures such as POWER which have a greater page size.
So make a single contiguous write-combining mapping after the
uncacheable mapping, aligned to the host page size, and link PIO
buffers there.  Where necessary, allocate additional VIs within
the write-combining mapping purely for access to PIO buffers.

Link all TX buffers to TX queues and the additional VIs in
efx_ef10_dimension_resources() and in efx_ef10_init_nic() after
an MC reboot.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-09-20 19:31:49 +01:00
Fengguang Wu 9fd8095dc1 sfc: efx_ef10_filter_update_rx_scatter() can be static
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-09-20 19:31:44 +01:00
Ben Hutchings a915ccc9f2 sfc: Reinitialise and re-validate datapath caps after MC reboot
After an MC reboot, the datapath may be running a different firmware
variant and have different capabilities.  It is critical that we know
the current capabilities so that we can pass valid flags to
MC_CMD_INIT_EVQ.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-09-11 15:29:53 +01:00
Ben Hutchings e5a2538a48 sfc: Clean up validation of datapath capabilities
Rename efx_ef10_init_capabilities() to the more specific
efx_ef10_init_datapath_caps().

Stop accepting short responses to MC_CMD_GET_CAPABILITIES; we
don't need to support pre-production firmware.

Move the check for RX prefix support from efx_ef10_probe() into
efx_ef10_init_datapath_caps() and use consistent error messages
for missing TSO support and missing RX prefix support.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-09-11 15:29:52 +01:00
Ben Hutchings 869070c530 sfc: Reset derived rx_bad_bytes statistic when EF10 MC is rebooted
If the MC reboots then the stats it reports to us will have been
reset.  We need to reset ours to get efx_update_diff_stat() working
properly.

(This is a re-run of commit 876be083b6 'sfc: Reset driver's
MAC stats after MC reboot seen'.)

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-09-11 15:29:51 +01:00
Ben Hutchings 8b59f017e4 sfc: Disable PTP on EF10 until we're ready to handle inline RX timestamps
Unlike Siena where timestamping is provided by a peripheral, EF10
delivers RX timestamps in the packet prefix.  However the driver
doesn't yet support this.

We are also creating a PHC device for each EF10 function, even though
the clock is really shared between all of them.

Disable hardware PTP/timestamping support until it's complete.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-09-11 15:28:27 +01:00
Ben Hutchings 8127d661e7 sfc: Add support for Solarflare SFC9100 family
This adds support for the EF10 network controller architecture and the
SFC9100 family, starting with SFC9120 'Farmingdale', and bumps the
driver version to 4.0.

New features in the SFC9100 family include:

- Flexible allocation of internal resources to PCIe physical and virtual
  functions under firmware control
- RX event merging to reduce DMA writes at high packet rates
- Integrated RX timestamping
- PIO buffers for lower TX latency
- Firmware-driven data path that supports additional offload features
  and filter types
- Delivery of packets between functions and to multiple recipients,
  allowing firmware to implement a vswitch
- Multiple RX flow hash (RSS) contexts with their own hash keys and
  indirection tables
- 40G MAC (single port only)

...not all of which are enabled in this initial driver or the initial
firmware release.

Much of the new code is by Jon Cooper.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-29 19:19:29 +01:00