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path: root/drivers/net/ethernet/sfc/nic.h
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2017-12-21sfc: expose CTPIO stats on NICs that support themBert Kenward1-0/+17
While the Linux driver doesn't use CTPIO ('cut-through programmed I/O'), other drivers on the same port might, so if we're responsible for reporting per-port stats we need to include the CTPIO stats. Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-21sfc: expose FEC stats on Medford2Edward Cree1-0/+7
There's no explicit capability bit, so we just condition them on having efx->num_mac_stats >= MC_CMD_MAC_NSTATS_V2. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-25locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns ↵Mark Rutland1-3/+3
to READ_ONCE()/WRITE_ONCE() Please do not apply this to mainline directly, instead please re-run the coccinelle script shown below and apply its output. For several reasons, it is desirable to use {READ,WRITE}_ONCE() in preference to ACCESS_ONCE(), and new code is expected to use one of the former. So far, there's been no reason to change most existing uses of ACCESS_ONCE(), as these aren't harmful, and changing them results in churn. However, for some features, the read/write distinction is critical to correct operation. To distinguish these cases, separate read/write accessors must be used. This patch migrates (most) remaining ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following coccinelle script: ---- // Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and // WRITE_ONCE() // $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch virtual patch @ depends on patch @ expression E1, E2; @@ - ACCESS_ONCE(E1) = E2 + WRITE_ONCE(E1, E2) @ depends on patch @ expression E; @@ - ACCESS_ONCE(E) + READ_ONCE(E) ---- Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: davem@davemloft.net Cc: linux-arch@vger.kernel.org Cc: mpe@ellerman.id.au Cc: shuah@kernel.org Cc: snitzer@redhat.com Cc: thor.thayer@linux.intel.com Cc: tj@kernel.org Cc: viro@zeniv.linux.org.uk Cc: will.deacon@arm.com Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-05-12sfc: revert changes to NIC revision numbersBert Kenward1-2/+6
The revision enum values (eg EFX_REV_HUNT_A0) form part of our API, and are included in ethtool. If these are inconsistent then ethtool will print garbage for a register dump (ethtool -d). Fixes: 5a6681e22c14 ("sfc: separate out SFC4000 ("Falcon") support into new sfc-falcon driver") Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-09sfc: configure UDP tunnel offload portsJon Cooper1-0/+7
Implement ndo_udp_tunnel_{add,del} to update the NIC's list of VXLAN and GENEVE UDP ports. Also reset the port list to empty on driver load and on driver unload, with appropriate flag set on the unload case. These port numbers are used for RX inner checksum offload, and in future will also be used for TX inner checksum offload and encapsulated TSO. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-17sfc: read back RX hash config from the NIC when querying it with ethtool -xEdward Cree1-0/+1
Ensures that we report the key and indirection table the NIC is using, rather than (if setting them failed earlier) what we wanted it to use. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-16sfc: get PIO buffer size from the NICEdward Cree1-0/+2
The 8000 series SFC NICs have 4K PIO buffers, rather than the 2K of the 7000 series. Rather than having a hard-coded PIO buffer size (ER_DZ_TX_PIOBUF_SIZE), read it from the GET_CAPABILITIES_V2 MCDI response. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-16sfc: allow PIO more oftenEdward Cree1-3/+14
If an option descriptor has been sent on a queue but not followed by a packet, there will have been no completion event, so the read and write counts won't match and we'll think we can't do PIO. This combines with the fact that we have two TX queues (for en/disable checksum offload), and that both must be empty for PIO to happen. This patch adds a separate "packet_write_count" that tracks the most recent write_count we expect to see a completion event for; this excludes option descriptors but _includes_ PIO descriptors (even though they look like option descriptors). This is then used, rather than write_count, in efx_nic_tx_is_empty(). We only bother to maintain packet_write_count on EF10, since on Siena (a) there are no option descriptors and it always equals write_count, and (b) there's no PIO, so we don't need it anyway. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-30sfc: separate out SFC4000 ("Falcon") support into new sfc-falcon driverEdward Cree1-170/+2
Rationale: The differences between Falcon and Siena are in many ways larger than those between Siena and EF10 (despite Siena being nominally "Falcon- architecture"); for instance, Falcon has no MCPU, so there is no MCDI. Removing Falcon support from the sfc driver should simplify the latter, and avoid the possibility of Falcon support being broken by changes to sfc (which are rarely if ever tested on Falcon, it being end-of-lifed hardware). The sfc-falcon driver created in this changeset is essentially a copy of the sfc driver, but with Siena- and EF10-specific code, including MCDI, removed and with the "efx_" identifier prefix changed to "ef4_" (for "EFX 4000- series") to avoid collisions when both drivers are built-in. This changeset removes Falcon from the sfc driver's PCI ID table; then in sfc I've removed obvious Falcon-related code: I removed the Falcon NIC functions, Falcon PHY code, and EFX_REV_FALCON_*, then fixed up everything that referenced them. Also, increment minor version of both drivers (to 4.1). For now, CONFIG_SFC selects CONFIG_SFC_FALCON, so that updating old configs doesn't cause Falcon support to disappear; but that should be undone at some point in the future. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-18sfc: Firmware-Assisted TSO version 2Bert Kenward1-0/+2
Add support for FATSOv2 to the driver. FATSOv2 offloads far more of the task of TCP segmentation to the firmware, such that we now just pass a single super-packet to the NIC. This means TSO has a great deal in common with a normal DMA transmit, apart from adding a couple of option descriptors. NIC-specific checks have been moved off the fast path and in to initialisation where possible. This also moves FATSOv1/SWTSO to a new file (tx_tso.c). The end of transmit and some error handling is now outside TSO, since it is common with other code. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-26sfc: work around TRIGGER_INTERRUPT command not working on SFC9140Jon Cooper1-2/+2
MC_CMD_TRIGGER_INTERRUPT does not work on the SFC9140, as used in the sfn7x42q and sfn7x24f. Check for this using the MCDI workaround mechanism. The command is only used during self test. If it's not supported, skip the interrupt test. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-12sfc: set interrupt moderation via MCDIBert Kenward1-0/+2
SFN8000-series NICs require a new method of setting interrupt moderation, via MCDI. This is indicated by a workaround flag. This new MCDI command takes an explicit time value rather than a number of ticks. It therefore makes sense to also store the moderation values in terms of time, since that is what the ethtool interface is interested in. Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-12sfc: retrieve second word of datapath capabilitiesBert Kenward1-0/+3
Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-15sfc: Implement list of VLANs added over interfaceAndrew Rybchenko1-0/+5
Right now it contains dummy VLAN entry with unspecified VID only. The entry is used for the case when HW VLAN filtering is not used. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-21sfc: enable cascaded multicast filters in MCFWDaniel Pieczko1-0/+2
After creating event queue 0, check to see if the workaround is enabled, and enable it if necessary. This will be called during PCI probe and also when coming back up after a reset. The nic_data->workaround_26807 will be used in the future to control the filter insertion behaviour based on this workaround. Only the primary PF can enable this workaround, so tolerate an EPERM error and continue. Otherwise, if any step in the checking and enabling of the workaround fails, the event queue must be removed. We check that workaround is implemented before trying to enable it, and store the current workaround setting before trying to change it. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-06-02sfc: display vadaptor statistics for all interfacesDaniel Pieczko1-0/+18
All interfaces will display vadaptor statistics, so set all the relevant bits in the stats bitmask. Only functions with the LINKCTRL flag will see other stats, including (per-port) MAC stats. The vadaptor stats are from rx_unicast to tx_overflow. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-06-02sfc: add "port_" prefix to MAC statsDaniel Pieczko1-53/+53
The MAC stats are per-port and will only be displayed on the PF with control of the link (one per physical port). Vadapter stats will also be displayed for this PF, so distinguish the MAC stats by adding a prefix of "port_". Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-06-02sfc: Implement ndo_gets_phys_port_id() for EF10 VFsShradha Shah1-0/+1
Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-21sfc: Store vf_index in nic_data for Ef10.Shradha Shah1-0/+1
Added function efx_ef10_get_vf_index to store the vf_index in nic_data during probe vf_index is needed in future patches to access a particular VF in the VF data structure. Moved efx_ef10_probe_pf and efx_ef10_probe_vf in order to used efx_ef10_remove Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09sfc: Add use of shared RSS contexts.Jon Cooper1-0/+2
Allow PFs to allocate shared RSS contexts if we exhaust our exclusive RSS contexts. Make VFs use shared RSS contexts in all cases. Spruce up error handling so that the shadow copy of the RSS table is updated after successful update, rather than in all cases, so that we report the actual contents of the RSS table after a failure to set it, rather than what we'd like it to be. Populate context_size parameter when vacuously allocating RSS context of size 1. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09sfc: create vports for VFs and assign random MAC addressesShradha Shah1-0/+7
The parent PF creates vports for all its child VFs and adds MAC addresses to these. When the VF driver loads, it can make an MCDI call to get the MAC address that the parent PF assigned it. The parent PF also assigns a mac address to its own vport because implicit creation of a vAdaptor will only work on evb ports with MAC addresses assigned. The vport MAC address needs to be stored in the PF's nic_data struct as it can later be changed on the vadaptor (and its net_dev struct). When removing a vport the original MAC address must be deleted. A new flag is needed in the VF data structure to identify whether a vport has been assigned to the VF. This is to determine whether it needs to be un-assigned before freeing the vport. Also, attempting to un-assign a vport which is not assigned will result in an EALREADY error. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09sfc: Prepare to bind the sfc driver to the VF.Shradha Shah1-0/+1
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>
2015-05-09sfc: get the PF number and record in nic_dataDaniel Pieczko1-0/+2
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>
2015-05-09sfc: create VEB vswitch and vport above default firmware setupDaniel Pieczko1-0/+2
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>
2015-05-09sfc: record the PF's vport ID in nic_dataDaniel Pieczko1-0/+2
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>
2015-05-09sfc: Record [rt]x_dpcpu_fw_id in EF10 nic_dataDaniel Pieczko1-0/+4
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>
2015-05-09sfc: Move and rename efx_vf struct to siena_vfDaniel Pieczko1-0/+2
The efx_vf struct contains Siena-specific fields for VFs, so rename to siena_vf. Also move it into the siena_nic_data struct, as EF10 will track its VFs in its own ef10_nic_data, storing much less information about them since VFDI is no longer used. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-09sfc: Own header for nic-specific sriov functions, single instance of ↵Shradha Shah1-111/+0
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>
2014-11-06sfc: Add NIC type operations to replace direct calls from efx.c into ↵Shradha Shah1-1/+23
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>
2014-11-06sfc: Rename implementations in siena_sriov.c to have a 'siena' prefixShradha Shah1-33/+37
Patch in preparation for the upcoming EF10 sriov support. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-06sfc: Move the current VF state from efx_nic into siena_nic_dataShradha Shah1-0/+18
This patch series provides a base and cleanup for the upcoming EF10 SRIOV support. This patch moves the VF state into siena_nic_data as a basis to save the VF state based on nic type. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-17sfc: add support for skb->xmit_moreEdward Cree1-5/+24
Don't ring the doorbell, and don't do PIO. This will also prevent TX Push, because there will be more than one buffer waiting when the doorbell is rung. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-15sfc: add extra RX drop counters for nodesc_trunc and noskb_dropEdward Cree1-3/+10
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>
2014-04-16sfc:On MCDI timeout, issue an FLR (and mark MCDI to fail-fast)Edward Cree1-0/+1
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>
2013-12-12sfc: Add PTP counters to ethtool statsBen Hutchings1-0/+2
These were implemented by Andrew Jackson and Laurence Evans but not previously included in-tree. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Changed the statistic name emerg_{fetch,wait} to hlb_{fetch,wait}Shradha Shah1-2/+2
The original names are unnecessarily alarming. Head-of-line blocking is not an emergency. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Implement efx_nic_type::filter_clear_rx operation for EF10Ben Hutchings1-2/+2
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>
2013-12-12sfc: Change efx_nic_type::rx_push_indir_table to push hash key as wellAndrew Rybchenko1-4/+0
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>
2013-12-12sfc: Add RX packet timestamping for EF10Jon Cooper1-0/+9
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>
2013-12-12sfc: split setup of hardware timestamping into NIC-type operationDaniel Pieczko1-0/+3
I added efx_ptp_get_mode() to avoid moving the definition for efx_ptp_data, since the current PTP mode is needed for siena.c:siena_set_ptp_hwtstamp. [bwh: Also move the rx_filters mask, and add kernel-doc] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Remove dependency of PTP on having a dedicated channelBen Hutchings1-1/+3
We need a dedicated channel on Siena to ensure we can match up the separate RX and timestamp events for each PTP packet. We won't do this for EF10 as timestamps are delivered inline. Pass a channel index of 0 to MC_CMD_PTP_OP_ENABLE when there is no dedicated channel. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Correct RX dropped count for drops while interface is downJon Cooper1-0/+1
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>
2013-12-06Merge branch 'sfc-3.13' into masterBen Hutchings1-0/+2
Merge sfc fixes destined for 3.13, as development for 3.14+ depends on some of them.
2013-12-06sfc: Stop/re-start PTP when stopping/starting the datapath.Alexandre Rames1-0/+2
This disables PTP when we bring the interface down to avoid getting unmatched RX timestamp events, and tries to re-enable it when bringing the interface up. [bwh: Make efx_ptp_stop() safe on Falcon. Introduce efx_ptp_{start,stop}_datapath() functions; we'll expand them later.] Fixes: 7c236c43b838 ('sfc: Add support for IEEE-1588 PTP') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-11-19sfc: Implement the SIOCGHWTSTAMP ioctlBen Hutchings1-1/+2
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-10-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-0/+12
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>
2013-10-04sfc: Add PM and RXDP drop counters to ethtool statsEdward Cree1-0/+12
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>
2013-09-24sfc: Remove extern from function prototypesJoe Perches1-107/+103
There are a mix of function prototypes with and without extern in the kernel sources. Standardize on not using extern for function prototypes. Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block. Signed-off-by: Joe Perches <joe@perches.com>
2013-09-20sfc: Separate out queue-empty check from efx_nic_may_push_tx_desc()Ben Hutchings1-6/+22
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-09-20sfc: Allocate and link PIO buffers; map them with write-combiningBen Hutchings1-0/+18
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>
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