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path: root/drivers/net/ethernet/sfc/net_driver.h
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* sfc: Fix efx_rx_buf_offset() in the presence of swiotlbBen Hutchings2013-02-26
| | | | | | | | | | | We assume that the mapping between DMA and virtual addresses is done on whole pages, so we can find the page offset of an RX buffer using the lower bits of the DMA address. However, swiotlb maps in units of 2K, breaking this assumption. Add an explicit page_offset field to struct efx_rx_buffer. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Work-around flush timeout when flushes have completedDaniel Pieczko2012-11-30
| | | | | | | | | | We sometimes hit a "failed to flush" timeout on some TX queues, but the flushes have completed and the flush completion events seem to go missing. In this case, we can check the TX_DESC_PTR_TBL register and drain the queues if the flushes had finished. [bwh: Minor fixes to coding style] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Really disable flow control while flushingBen Hutchings2012-11-30
| | | | | | | | | | Receiving pause frames can block TX queue flushes. Earlier changes work around this by reconfiguring the MAC during flushes for VFs, but during flushes for the PF we would only change the fc_disable counter. Unless the MAC is reconfigured for some other reason during the flush (which I would not expect to happen) this had no effect at all. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* ptp: Enable clock drivers along with associated net/PHY driversBen Hutchings2012-11-01
| | | | | | | | | | | | | | | | Where a PTP clock driver is associated with a net or PHY driver, it should be enabled automatically whenever that driver is enabled. Therefore: - Make PTP clock drivers select rather than depending on PTP_1588_CLOCK - Remove separate boolean options for PTP clock drivers that are built as part of net driver modules. (This also fixes cases where the PTP subsystem is wrongly forced to be built-in.) - Set 'default y' for PTP clock drivers that depend on specific net drivers but are built separately Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net/ethernet/sfc: use standard __{clear,set}_bit_le() functionsBen Hutchings2012-10-05
| | | | | | | | | | | There are now standard functions for dealing with little-endian bit arrays, so use them instead of our own implementations. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sfc: Bump version to 3.2Ben Hutchings2012-09-18
| | | | | | The key new feature for 3.2 is PTP support. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Add support for IEEE-1588 PTPStuart Hodgson2012-09-18
| | | | | | | | | | | | | Add PTP IEEE-1588 support and make accesible via the PHC subsystem. This work is based on prior code by Andrew Jackson Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> [bwh: - Add byte order conversion in efx_ptp_send_times() - Simplify conversion of PPS event times - Add the built-in vs module check to CONFIG_SFC_PTP dependencies] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Add channel specific receive_skb handler and post_remove callbackStuart Hodgson2012-09-07
| | | | | | | | | | | Allows an extra channel to override the standard receive_skb handler and also for extra non generic operations to be performed on remove. Also set default rx strategy so only skbs can be delivered to the PTP receive function. Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Add explicit RX queue flag to channelStuart Hodgson2012-09-07
| | | | | | | | | | The PTP channel will have its own RX queue even though it's not a regular traffic channel. Original work by Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Change state names to be clearer, and comment themBen Hutchings2012-08-24
| | | | | | | | | | | | | STATE_INIT and STATE_FINI are equivalent and represent incompletely initialised states; combine them as STATE_UNINIT. Rename STATE_RUNNING to STATE_READY, to avoid confusion with netif_running() and IFF_RUNNING. The comments do not quite match current usage, but this will be corrected in subsequent fixes. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Simplify TSO header buffer allocationBen Hutchings2012-08-24
| | | | | | | | | | | | | | | | | | TSO header buffers contain a control structure immediately followed by the packet headers, and are kept on a free list when not in use. This complicates buffer management and tends to result in cache read misses when we recycle such buffers (particularly if DMA-coherent memory requires caches to be disabled). Replace the free list with a simple mapping by descriptor index. We know that there is always a payload descriptor between any two descriptors with TSO header buffers, so we can allocate only one such buffer for each two descriptors. While we're at it, use a standard error code for allocation failure, not -1. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Stop TX queues before they fill upBen Hutchings2012-08-24
| | | | | | | We now have a definite upper bound on the number of descriptors per skb; use that to stop the queue when the next packet might not fit. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Refactor struct efx_tx_buffer to use a flags fieldBen Hutchings2012-08-24
| | | | | | | | | | | | | | Add a flags field to struct efx_tx_buffer, replacing the continuation and map_single booleans. Since a single descriptor cannot be both a TSO header and the last descriptor for an skb, unionise efx_tx_buffer::{skb,tsoh} and add flags for validity of these fields. Clear all flags in free buffers (whereas previously the continuation flag would be set). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* Merge branch 'for-davem' of ↵David S. Miller2012-07-18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc-next Ben Hutchings says: ==================== 1. Fix potential badness when running a self-test with SR-IOV enabled. 2. Fix calculation of some interface statistics that could run backward. 3. Miscellaneous cleanup. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * sfc: Disable VF queues during register self-testBen Hutchings2012-07-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently VF queues and drivers may remain active during this test. This could cause memory corruption or spurious test failures. Therefore we reset the port/function before running these tests on Siena. On Falcon this doesn't work: we have to do some additional initialisation before some blocks will work again. So refactor the reset/register-test sequence into an efx_nic_type method so efx_selftest() doesn't have to consider such quirks. In the process, fix another minor bug: Siena does not have an 'invisible' reset and the self-test currently fails to push the PHY configuration after resetting. Passing RESET_TYPE_ALL to efx_reset_{down,up}() fixes this. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
| * sfc: Use generic DMA API, not PCI-DMA APIBen Hutchings2012-07-17
| | | | | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* | drivers/net/ethernet: Fix (nearly-)kernel-doc comments for various functionsBen Hutchings2012-07-11
|/ | | | | | | | | | Fix incorrect start markers, wrapped summary lines, missing section breaks, incorrect separators, and some name mismatches. Delete a few that are content-free. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Added support for new ethtool APIs for obtaining module eepromStuart Hodgson2012-05-09
| | | | | | | | | | Currently allows for SFP+ eeprom to be returned using the ethtool API. This can be extended in future to handle different eeprom formats and sizes Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> [bwh: Drop redundant validation, comment, whitespace] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Fill RX rings completely full, rather than to 95% fullDavid Riddoch2012-05-09
| | | | | | | There was no runtime control of the fast_fill_limit in any case, so purged that field. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Remove efx_channel::last_eventq_read_ptrBen Hutchings2012-03-06
| | | | | | This member has never been used in a production version of the driver. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Run event/IRQ self-test asynchronously when interface is brought upBen Hutchings2012-03-06
| | | | | | | | Generate a test event on each event queue whenever the interface is brought up, then after 1 second check that we have either handled a test event or handled another IRQ for each event queue. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Correct efx_for_each_possible_channel_tx_queue() to skip non-TX channelsBen Hutchings2012-02-22
| | | | | | | | | efx_for_each_possible_channel_tx_queue() should do nothing for RX-only or extra channels. The current definition results in allocating additional unused hardware TX queues when using the mqprio qdisc and either separate_tx_channels or SR-IOV. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Add SR-IOV back-end support for SFC9000 familyBen Hutchings2012-02-15
| | | | | | | | | | | | | | | | | | | | | | | On the SFC9000 family, each port has 1024 Virtual Interfaces (VIs), each with an RX queue, a TX queue, an event queue and a mailbox register. These may be assigned to up to 127 SR-IOV virtual functions per port, with up to 64 VIs per VF. We allocate an extra channel (IRQ and event queue only) to receive requests from VF drivers. There is a per-port limit of 4 concurrent RX queue flushes, and queue flushes may be initiated by the MC in response to a Function Level Reset (FLR) of a VF. Therefore, when SR-IOV is in use, we submit all flush requests via the MC. The RSS indirection table is shared with VFs, so the number of RX queues used in the PF is limited to the number of VIs per VF. This is almost entirely the work of Steve Hodgson, formerly shodgson@solarflare.com. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Allocate SRAM between buffer table and descriptor caches at init timeBen Hutchings2012-02-15
| | | | | | | | | Each port has a block of 64-bit SRAM that is divided between buffer table and descriptor cache regions at initialisation time. Currently we use a fixed allocation, but it needs to be changed to support larger numbers of queues. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Add support for 'extra' channel typesBen Hutchings2012-02-15
| | | | | | | | | | | | | | Abstract some of the channel operations to allow for 'extra' channels that do not have RX or TX queues. - Try to assign a channel to each extra channel type that is enabled for the NIC, but gracefully degrade if we can't allocate sufficient MSI-X vectors - Allow each extra channel type to generate its own channel name - Allow channel types to disable reallocation and reinitialisation of their channels Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Make all CPU/IRQ/channel/queue counts unsignedBen Hutchings2012-02-15
| | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Make buffer table indices and counts consistently unsignedBen Hutchings2012-02-15
| | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Disable flow control during flushesSteve Hodgson2012-02-15
| | | | | | | | | | | | | | | | The TX DMA engine issues upstream read requests when there is room in the TX FIFO for the completion. However, the fetches for the rest of the packet might be delayed by any back pressure. Since a flush must wait for an EOP, the entire flush may be delayed by back pressure. Mitigate this by disabling flow control before the flushes are started. Since PF and VF flushes run in parallel introduce fc_disable, a reference count of the number of flushes outstanding. The same principle could be applied to Falcon, but that would bring with it its own testing. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Leave interrupts and event queues enabled whenever we canBen Hutchings2012-02-15
| | | | | | | | | | | | | | | | | | | | | When SR-IOV is enabled we may receive FLR (Function-Level Reset) events, associated queue flush events and requests from VF drivers at any time. Therefore we need to keep event queues and interrupts enabled whenever possible. Currently we stop interrupt-driven event processing before flushing RX and TX queues; efx_nic_flush_queues() then polls event queues for flush events and discards any others it finds. Change it to work with the regular event handling functions. Currently efx_start_channel() fills RX queues synchronously when a device is brought up. This could now race with NAPI, so change it to send fill events. This was almost entirely written by Steve Hodgson, formerly shodgson@solarflare.com. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Replace efx_rx_buffer::is_page and other booleans with a flags fieldBen Hutchings2012-01-26
| | | | | | | Replace checksummed and discard booleans from efx_handle_rx_event() with a bitmask, added to the flags field. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Make all MAC statistics consistently 64 bits wideBen Hutchings2012-01-26
| | | | | | | | | | | | | Currently we use type u64 for byte counts, which can very quickly exceed 2^32, and unsigned long for packet counts, which do not. But it can still take only 20-something minutes to send or receive 2^32 packets, and not all tools properly handle overflow even if they sample more often than this. The MAC statistics are all updated synchronously, so it costs very little to make them all 64-bit regardless of native word size. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Remove obsolete function efx_dev_name()Ben Hutchings2012-01-26
| | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Clean up test interrupt handlingBen Hutchings2012-01-26
| | | | | | | | | | | | | | | | | | | Interrupts are normally generated by the event queues, moderated by timers. However, they may also be triggered by detection of a 'fatal' error condition (e.g. memory parity error) or by the host writing to certain CSR fields as part of a self-test. The IRQ level/index used for these on Falcon rev B0 and Siena is set by the KER_INT_LEVE_SEL field and cached by the driver in efx_nic::fatal_irq_level. Since this value is also relevant to self-tests rename the field to just 'irq_level'. Avoid unnecessary cache traffic by using a per-channel 'last_irq_cpu' field and only writing to the per-controller field when the interrupt matches efx_nic::irq_level. Remove the volatile qualifier and use ACCESS_ONCE in the places we read these fields. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Correct interrupt timer quantum for Siena (normal and turbo mode)Ben Hutchings2012-01-26
| | | | | | | | | | | | | | | | We currently assume that the timer quantum for Siena is 5 us, the same as for Falcon. This is not correct; timer ticks are generated on a rota which takes a minimum of 768 cycles (each event delivery or other timer change will delay it by 3 cycles). The timer quantum should be 6.144 or 3.072 us depending on whether turbo mode is active. Replace EFX_IRQ_MOD_RESOLUTION with a timer_quantum_ns field in struct efx_nic, initialised by the efx_nic_type::probe function. While we're at it, replace EFX_IRQ_MOD_MAX with a timer_period_max field in struct efx_nic_type. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Consistently test DEBUG macro, not EFX_ENABLE_DEBUGBen Hutchings2012-01-26
| | | | | | | | | | | | | | | | | | The netif_dbg() macro is defined in <linux/netdevice.h>. If the DEBUG macro is defined, it logs a message at 'debug' level, otherwise it does nothing. In net_driver.h we define DEBUG if EFX_ENABLE_DEBUG is defined, but this is too late for those source files that already got a definition of netif_dbg() by including <linux/netdevice.h> Get rid of EFX_ENABLE_DEBUG, and only define and test DEBUG. In mtd.c, we do not use DEBUG as a condition flag but are forced to use the DEBUG macro-function from <linux/mtd/mtd.h>. Undefine DEBUG before including it. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Remove efx_nic_type::push_multicast_hash operationBen Hutchings2012-01-26
| | | | | | | | | | | | Both implementations of efx_nic_type::reconfigure_mac operation push the multicast hash filter to the hardware. It is therefore redundant to call efx_nic_type::push_multicast_hash as well. efx_mcdi_mac_reconfigure() also uses this operation, but the implementation for Siena just uses MCDI anyway. Merge that into efx_mcdi_mac_reconfigure(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Merge efx_mac_operations into efx_nic_typeBen Hutchings2012-01-26
| | | | | | | | | | | | | | | | | | | No NICs need to switch efx_mac_operations at run-time, and the MAC operations are fairly closely bound to NIC types. Move efx_mac_operations::reconfigure to efx_nic_type::reconfigure_mac and efx_mac_operations::check_fault fo efx_nic_type::check_mac_fault. Change callers to call through efx->type or directly if the NIC type is known. Remove efx_mac_operations::update_stats. The implementations for Falcon used to fetch MAC statistics synchronously and this was used by efx_register_netdev() to clear statistics after running self-tests. However, it now only converts statistics that have already been fetched (and that only for Falcon), and the call from efx_register_netdev() has no effect. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Hold efx_nic::stats_lock while reading efx_nic::mac_statsBen Hutchings2012-01-26
| | | | | | | | | | | | efx_nic::stats_lock is used to serialise stats updates, but each reader was dropping it before it finished reading efx_nic::mac_stats. If there were concurrent stats reads using procfs, or one using procfs and one using ethtool, an update could race with a read. On a 32-bit system, the reader could see word-tearing of 64-bit stats (32 bits of the old value and 32 bits of the new). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Const-qualify static data as appropriate, partly prompted by checkpatchBen Hutchings2012-01-09
| | | | | | | | | | | | Fix the following warnings: WARNING: struct dev_pm_ops should normally be const WARNING: static const char * array should probably be static const char * const Similarly const-qualify struct i2c_board_info, struct i2c_algo_bit_data, struct efx_ethtool_stat, struct efx_mtd_ops and struct siena_nvram_type_info. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* net: introduce and use netdev_features_t for device features setsMichał Mirosław2011-11-16
| | | | | | | | | | v2: add couple missing conversions in drivers split unexporting netdev_fix_features() implemented %pNF convert sock::sk_route_(no?)caps Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Move the Solarflare driversJeff Kirsher2011-08-11
Moves the Solarflare drivers into drivers/net/ethernet/sfc/ and make the necessary Kconfig and Makefile changes. CC: Steve Hodgson <shodgson@solarflare.com> CC: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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