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2011-04-11Merge branch 'master' of ↵David S. Miller5-8/+8
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/smsc911x.c
2011-04-05sfc: Implement ethtool_ops::set_phys_id instead of ethtool_ops::phys_idBen Hutchings1-10/+18
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-04-05sfc: Implement generic features interfaceBen Hutchings4-84/+18
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-04-05sfc: Enable all TSO features on VLANsBen Hutchings1-1/+1
The TSO code already supports IPv6 on VLAN, so enable it. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-04-01sfc: Move test of rx_checksum_enabled from nic.c to rx.cBen Hutchings2-4/+5
This is preparation for using the generic netdev features interface, and should have no effect in itself. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-03-31Fix common misspellingsLucas De Marchi5-8/+8
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-23sfc: Siena: Disable write-combining when SR-IOV is enabledSteve Hodgson2-2/+18
If SR-IOV is enabled by firmware, even if it is not enabled in the PCI capability, TX pushes using write-combining may be corrupted. We want to know whether it is enabled before mapping the NIC registers, and even if PCI extended capabilities are not accessible. Therefore, we look for the MSI capability, which is removed if SR-IOV is enabled. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-03-08Merge branch 'for-davem' of ↵David S. Miller3-10/+16
git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc-next-2.6
2011-03-04sfc: Use write-combining to reduce TX latencyBen Hutchings3-10/+16
Based on work by Neil Turton <nturton@solarflare.com> and Kieran Mansley <kmansley@solarflare.com>. The BIU has now been verified to handle 3- and 4-dword writes within a single 128-bit register correctly. This means we can enable write- combining and only insert write barriers between writes to distinct registers. This has been observed to save about 0.5 us when pushing a TX descriptor to an empty TX queue. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-03-03Merge branch 'master' of ↵David S. Miller1-9/+13
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/bnx2x/bnx2x.h
2011-02-28sfc: Bump version to 3.1Ben Hutchings1-1/+1
All features originally planned for version 3.1 (and some that weren't) have been implemented. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-28sfc: Remove configurable FIFO thresholds for pause frame generationBen Hutchings4-41/+5
In Falcon we can configure the fill levels of the RX data FIFO which trigger the generation of pause frames (if enabled), and we have module parameters for this. Siena does not allow the levels to be configured (or, if it does, this is done by the MC firmware and is not configurable by drivers). So far as I can tell, the module parameters are not used by our internal scripts and have not been documented (with the exception of the short parameter descriptions). Therefore, remove them and always initialise Falcon with the default values. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-28sfc: Expose TX push and TSO counters through ethtool statisticsBen Hutchings1-1/+20
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-28sfc: Update copyright datesBen Hutchings30-30/+30
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-28sfc: Do not read STAT1.FAULT in efx_mdio_check_mmd()Ben Hutchings4-31/+8
This field does not exist in all MMDs we want to check, and all callers allow it to be set (fault_fatal = 0). Remove the loopback condition, as STAT2.DEVPRST should be valid regardless of any fault. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-28sfc: Read MC firmware version when requested through ethtoolBen Hutchings5-41/+9
We currently make no use of siena_nic_data::fw_{version,build} except to format the firmware version for ethtool_get_drvinfo(). Since we only read the version at start of day, this information is incorrect after an MC firmware update. Remove the cached version information and read it via MCDI whenever it is requested. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-28sfc: Reduce size of efx_rx_buffer further by removing data memberSteve Hodgson2-24/+28
Instead calculate the KVA of receive data. It's not like it's a hard sum. [bwh: Fixed to work with GRO.] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-28sfc: Reduce size of efx_rx_buffer by unionising skb and pageSteve Hodgson2-53/+51
[bwh: Forward-ported to net-next-2.6.] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-22sfc: lower stack usage in efx_ethtool_self_testEric Dumazet1-9/+13
drivers/net/sfc/ethtool.c: In function ‘efx_ethtool_self_test’: drivers/net/sfc/ethtool.c:613: warning: the frame size of 1200 bytes is larger than 1024 bytes Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-17sfc: Implement hardware acceleration of RFSBen Hutchings4-2/+169
Use the existing filter management functions to insert TCP/IPv4 and UDP/IPv4 4-tuple filters for Receive Flow Steering. For each channel, track how many RFS filters are being added during processing of received packets and scan the corresponding number of table entries for filters that may be reclaimed. Do this in batches to reduce lock overhead. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-16sfc: Limit filter search depth further for performance hints (i.e. RFS)Ben Hutchings1-4/+9
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-15sfc: Add TX queues for high-priority trafficBen Hutchings7-28/+156
Implement the ndo_setup_tc() operation with 2 traffic classes. Current Solarstorm controllers do not implement TX queue priority, but they do allow queues to be 'paced' with an enforced delay between packets. Paced and unpaced queues are scheduled in round-robin within two separate hardware bins (paced queues with a large delay may be placed into a third bin temporarily, but we won't use that). If there are queues in both bins, the TX scheduler will alternate between them. If we make high-priority queues unpaced and best-effort queues paced, and high-priority queues are mostly empty, a single high-priority queue can then instantly take 50% of the packet rate regardless of how many of the best-effort queues have descriptors outstanding. We do not actually want an enforced delay between packets on best- effort queues, so we set the pace value to a reserved value that actually results in a delay of 0. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-15sfc: Distinguish queue lookup from test for queue existenceBen Hutchings3-29/+33
efx_channel_get_{rx,tx}_queue() currently return NULL if the channel isn't used for traffic in that direction. In most cases this is a bug, but some callers rely on it as an existence test. Add existence test functions efx_channel_has_{rx_queue,tx_queues}() and use them as appropriate. Change efx_channel_get_{rx,tx}_queue() to assert that the requested queue exists. Remove now-redundant initialisation from efx_set_channels(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-02-15sfc: Move TX queue core queue mapping into tx.cBen Hutchings3-4/+10
efx_hard_start_xmit() needs to implement a mapping which is the inverse of tx_queue::core_txq. Move the initialisation of tx_queue::core_txq next to efx_hard_start_xmit() to make the connection more obvious. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-01-24net: change netdev->features to u32Michał Mirosław2-3/+3
Quoting Ben Hutchings: we presumably won't be defining features that can only be enabled on 64-bit architectures. Occurences found by `grep -r` on net/, drivers/net, include/ [ Move features and vlan_features next to each other in struct netdev, as per Eric Dumazet's suggestion -DaveM ] Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2-14/+14
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (47 commits) GRETH: resolve SMP issues and other problems GRETH: handle frame error interrupts GRETH: avoid writing bad speed/duplex when setting transfer mode GRETH: fixed skb buffer memory leak on frame errors GRETH: GBit transmit descriptor handling optimization GRETH: fix opening/closing GRETH: added raw AMBA vendor/device number to match against. cassini: Fix build bustage on x86. e1000e: consistent use of Rx/Tx vs. RX/TX/rx/tx in comments/logs e1000e: update Copyright for 2011 e1000: Avoid unhandled IRQ r8169: keep firmware in memory. netdev: tilepro: Use is_unicast_ether_addr helper etherdevice.h: Add is_unicast_ether_addr function ks8695net: Use default implementation of ethtool_ops::get_link ks8695net: Disable non-working ethtool operations USB CDC NCM: Don't deref NULL in cdc_ncm_rx_fixup() and don't use uninitialized variable. vxge: Remember to release firmware after upgrading firmware netdev: bfin_mac: Remove is_multicast_ether_addr use in netdev_for_each_mc_addr ipsec: update MAX_AH_AUTH_LEN to support sha512 ...
2011-01-14Merge branch 'linux-next' of ↵Linus Torvalds1-20/+5
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI/PM: Report wakeup events before resuming devices PCI/PM: Use pm_wakeup_event() directly for reporting wakeup events PCI: sysfs: Update ROM to include default owner write access x86/PCI: make Broadcom CNB20LE driver EMBEDDED and EXPERIMENTAL x86/PCI: don't use native Broadcom CNB20LE driver when ACPI is available PCI/ACPI: Request _OSC control once for each root bridge (v3) PCI: enable pci=bfsort by default on future Dell systems PCI/PCIe: Clear Root PME Status bits early during system resume PCI: pci-stub: ignore zero-length id parameters x86/PCI: irq and pci_ids patch for Intel Patsburg PCI: Skip id checking if no id is passed PCI: fix __pci_device_probe kernel-doc warning PCI: make pci_restore_state return void PCI: Disable ASPM if BIOS asks us to PCI: Add mask bit definition for MSI-X table PCI: MSI: Move MSI-X entry definition to pci_regs.h Fix up trivial conflicts in drivers/net/{skge.c,sky2.c} that had in the meantime been converted to not use legacy PCI power management, and thus no longer use pci_restore_state() at all (and that caused trivial conflicts with the "make pci_restore_state return void" patch)
2011-01-13sfc: Restore the effect of the rss_cpus module parameterBen Hutchings1-0/+3
Commit a4900ac ("sfc: Create multiple TX queues") accidentally disabled the rss_cpus module parameter. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2011-01-13sfc: Make efx_get_tx_queue() an inline functionBen Hutchings2-14/+11
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-23PCI: make pci_restore_state return voidJon Mason1-20/+5
pci_restore_state only ever returns 0, thus there is no benefit in having it return any value. Also, a large majority of the callers do not check the return code of pci_restore_state. Make the pci_restore_state a void return and avoid the overhead. Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Jon Mason <jon.mason@exar.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-12-21Merge branch 'for-davem' of ↵David S. Miller4-115/+35
git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc-next-2.6
2010-12-10netdev: Use default implementation of ethtool_ops::get_link where possibleBen Hutchings1-8/+1
Various drivers are using implementations of ethtool_ops::get_link that are equivalent to the default ethtool_op_get_link(). Change them to use that instead. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-10sfc: convert references to LRO to GROstephen hemminger1-15/+15
This driver now uses Generic Receive Offload, not the older LRO. Change references to LRO in names and comments. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-10sfc: Remove ancient support for nesting of TX stopBen Hutchings4-113/+35
Long before this driver went into mainline, it had support for multiple TX queues per port, with lockless TX enabled. Since Linux did not know anything of this, filling up any hardware TX queue would stop the core TX queue and multiple hardware TX queues could fill up before the scheduler reacted. Thus it was necessary to keep a count of how many TX queues were stopped and to wake the core TX queue only when all had free space again. The driver also previously (ab)used the per-hardware-queue stopped flag as a counter to deal with various things that can inhibit TX, but it no longer does that. Remove the per-channel tx_stop_count, tx_stop_lock and per-hardware-queue stopped count and just use the networking core queue state directly. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-10sfc: Remove unused field and comment on a previously removed fieldBen Hutchings1-2/+0
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-10Merge branch 'for-davem' of ↵David S. Miller8-306/+468
git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc-next-2.6
2010-12-08Merge branch 'master' of ↵David S. Miller3-14/+37
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/ath/ath9k/ar9003_eeprom.c net/llc/af_llc.c
2010-12-07sfc: Fix NAPI list corruption during ring reallocationBen Hutchings1-12/+19
Call netif_napi_{add,del}() on the NAPI contexts in the new and old channels, respectively. Since efx_init_napi() cannot fail, make its return type void. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-07sfc: Fix crash in legacy onterrupt handler during ring reallocationBen Hutchings3-2/+18
If we are using a legacy interrupt, our IRQ may be shared and our interrupt handler may be called even though interrupts are disabled on the NIC. When we change ring sizes, we reallocate the event queue and the interrupt handler may use an invalid pointer when called for another device's interrupt. Maintain a legacy_irq_enabled flag and test that at the top of the interrupt handler. Note that this problem results from the need to work around broken INT_ISR0 reads, and does not affect the legacy interrupt handler for Falcon A1. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-07sfc: Generalise filter spec initialisationBen Hutchings3-191/+248
Move search_depth arrays into per-table state. Define initialisation function efx_filter_init_rx() which sets everything apart from the match fields. Define efx_filter_set_{ipv4_local,ipv4_full,eth_local}() to set the match fields. This allows some simplification of callers and later support for additional protocols and more flexible matching using multiple calls to these functions. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-07sfc: Remove filter table IDs from filter functionsBen Hutchings4-25/+34
The separation between filter tables is largely an internal detail and it may be removed in future hardware. To prepare for that: - Merge table ID with filter index to make an opaque filter ID - Wrap efx_filter_table_clear() with a function that clears filters from both RX tables, which is all that the current caller requires Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-07sfc: Log start and end of ethtool self-test at INFO levelBen Hutchings1-3/+6
Add message at start of self-test and increase log level of message at end of self-test, so that any other messages produced during the test are clearly associated with it. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-06sfc: Use TX push whenever adding descriptors to an empty queueBen Hutchings3-2/+68
Whenever we add DMA descriptors to a TX ring and update the ring pointer, the TX DMA engine must first read the new DMA descriptors and then start reading packet data. However, all released Solarflare 10G controllers have a 'TX push' feature that allows us to reduce latency by writing the first new DMA descriptor along with the pointer update. This is only useful when the queue is empty. The hardware should ignore the pushed descriptor if the queue is not empty, but this check is buggy, so we must do it in software. In order to tell whether a TX queue is empty, we need to compare the previous transmission count (write_count) and completion count (read_count). However, if we do that every time we update the ring pointer then read_count may ping-pong between the caches of two CPUs running the transmission and completion paths for the queue. Therefore, we split the check for an empty queue between the completion path and the transmission path: - Add an empty_read_count field representing a point at which the completion path saw the TX queue as empty. - Add an old_write_count field for use on the completion path. - On the completion path, whenever read_count reaches or passes old_write_count the TX queue may be empty. We then read write_count, set empty_read_count if read_count == write_count, and update old_write_count. - On the transmission path, we read empty_read_count. If it's set, we compare it with the value of write_count before the current set of descriptors was added. If they match, the queue really is empty and we can use TX push. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-06sfc: Remove locking from implementation of efx_writeo_paged()Ben Hutchings1-1/+14
It is not necessary to serialise writes to the paged 128-bit registers. However, if we don't then we must always write the last dword separately, not as part of a qword write. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-06sfc: Add compile-time checks for correctness of paged register writesBen Hutchings1-8/+23
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-06sfc: Remove redundant memory barriers between MMIOsBen Hutchings1-5/+0
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-06sfc: Expand/correct comments on collector behaviour and function usageBen Hutchings1-49/+49
Document exactly which registers and functions have special behaviour, and why races on writes to descriptor pointers are safe. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-06sfc: Use ACCESS_ONCE when copying efx_tx_queue::read_countBen Hutchings1-3/+2
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-06sfc: Reorder struct efx_nic to separate fields by volatilityBen Hutchings1-18/+23
Place the regularly updated fields (locks, MAC stats, etc.) on a separate cache-line from fields which are mostly constant. This should reduce cache misses for access to the latter on the data path. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2010-12-03sfc: Store MAC address from NVRAM in net_device::perm_addrBen Hutchings4-13/+7
For some reason we failed to make this change when perm_addr was introduced. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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