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path: root/drivers/net/ethernet/sfc/efx.h
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* sfc: Fix EEH with legacy interrupts.Alexandre Rames2013-06-241-0/+1
| | | | | | | | PCI legacy interrupts are level-triggered, and we cannot mask them up on an isolated device. Instead, disable the IRQ at the controller until we have recovered. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: allocate more RX buffers per pageDaniel Pieczko2013-03-071-0/+1
| | | | | | | | | | Allocating 2 buffers per page is insanely inefficient when MTU is 1500 and PAGE_SIZE is 64K (as it usually is on POWER). Allocate as many as we can fit, and choose the refill batch size at run-time so that we still always use a whole page at once. [bwh: Fix loop condition to allow for compound pages; rebase] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Enable RX DMA scattering where possibleBen Hutchings2013-03-071-7/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable RX DMA scattering iff an RX buffer large enough for the current MTU will not fit into a single page and the NIC supports DMA scattering for kernel-mode RX queues. On Falcon and Siena, the RX_USR_BUF_SIZE field is used as the DMA limit for both all RX queues with scatter enabled. Set it to 1824, matching what Onload uses now. Maintain a statistic for frames truncated due to lack of descriptors (rx_nodesc_trunc). This is distinct from rx_frm_trunc which may be incremented when scattering is disabled and implies an over-length frame. Whenever an MTU change causes scattering to be turned on or off, update filters that point to the PF queues, but leave others unchanged, as VF drivers assume scattering is off. Add n_frags parameters to various functions, and make them iterate: - efx_rx_packet() - efx_recycle_rx_buffers() - efx_rx_mk_skb() - efx_rx_deliver() Make efx_handle_rx_event() responsible for updating efx_rx_queue::removed_count. Change the RX pipeline state to a starting ring index and number of fragments, and make __efx_rx_packet() responsible for clearing it. Based on earlier versions by David Riddoch and Jon Cooper. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Wrap __efx_rx_packet() with efx_rx_flush_packet()Ben Hutchings2013-03-071-0/+7
| | | | | | | The pipeline mechanism will need to change a bit for scattered packets. Add a wrapper to insulate efx_process_channel() from this. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Remove rx_alloc_method SKBAlexandre Rames2013-03-071-1/+0
| | | | | | [bwh: Remove more dead code, and make efx_ptp_rx() pull the data it needs into the header area.] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Disable soft interrupt handling during efx_device_detach_sync()Ben Hutchings2013-03-061-2/+2
| | | | | | | | | | | | efx_device_detach_sync() locks all TX queues before marking the device detached and thus disabling further TX scheduling. But it can still be interrupted by TX completions which then result in TX scheduling in soft interrupt context. This will deadlock when it tries to acquire a TX queue lock that efx_device_detach_sync() already acquired. To avoid deadlock, we must use netif_tx_{,un}lock_bh(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: lock TX queues when calling netif_device_detach()Daniel Pieczko2012-12-011-0/+13
| | | | | | | The assertion of netif_device_present() at the top of efx_hard_start_xmit() may fail if we don't do this. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Add channel specific receive_skb handler and post_remove callbackStuart Hodgson2012-09-071-0/+1
| | | | | | | | | | | 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: Fix maximum number of TSO segments and minimum TX queue sizeBen Hutchings2012-08-021-4/+10
| | | | | | | | | | | | | | | | | | | | Currently an skb requiring TSO may not fit within a minimum-size TX queue. The TX queue selected for the skb may stall and trigger the TX watchdog repeatedly (since the problem skb will be retried after the TX reset). This issue is designated as CVE-2012-3412. Set the maximum number of TSO segments for our devices to 100. This should make no difference to behaviour unless the actual MSS is less than about 700. Increase the minimum TX queue size accordingly to allow for 2 worst-case skbs, so that there will definitely be space to add an skb after we wake a queue. To avoid invalidating existing configurations, change efx_ethtool_set_ringparam() to fix up values that are too small rather than returning -EINVAL. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Run event/IRQ self-test asynchronously when interface is brought upBen Hutchings2012-03-061-1/+1
| | | | | | | | 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: Add support for 'extra' channel typesBen Hutchings2012-02-161-0/+1
| | | | | | | | | | | | | | 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: Replace efx_rx_buffer::is_page and other booleans with a flags fieldBen Hutchings2012-01-271-2/+2
| | | | | | | 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: Clean up test interrupt handlingBen Hutchings2012-01-271-0/+6
| | | | | | | | | | | | | | | | | | | 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: Remove now-unused filter functionBen Hutchings2012-01-041-2/+0
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Add support for retrieving and removing filters by IDBen Hutchings2012-01-041-0/+12
| | | | | | | | These new functions will support an implementation of the ethtool RX NFC rules API. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Use consistent types for filter IDs, indices and search depthsBen Hutchings2012-01-041-1/+1
| | | | | | | | | | | Filter IDs are u32 (but never very large) so an ID/error return value should have type s32. Filter indices and search depths are never negative, so should have type unsigned int. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Remove device ID macros only used onceBen Hutchings2011-12-061-4/+0
| | | | | | | The SFC9020/SFL9021 device IDs are only used in the device ID table, where we can just as well use comments. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* Merge branch 'next-rebase' of ↵Linus Torvalds2011-10-281-4/+0
| | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci * 'next-rebase' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: PCI: Clean-up MPS debug output pci: Clamp pcie_set_readrq() when using "performance" settings PCI: enable MPS "performance" setting to properly handle bridge MPS PCI: Workaround for Intel MPS errata PCI: Add support for PASID capability PCI: Add implementation for PRI capability PCI: Export ATS functions to modules PCI: Move ATS implementation into own file PCI / PM: Remove unnecessary error variable from acpi_dev_run_wake() PCI hotplug: acpiphp: Prevent deadlock on PCI-to-PCI bridge remove PCI / PM: Extend PME polling to all PCI devices PCI quirk: mmc: Always check for lower base frequency quirk for Ricoh 1180:e823 PCI: Make pci_setup_bridge() non-static for use by arch code x86: constify PCI raw ops structures PCI: Add quirk for known incorrect MPSS PCI: Add Solarflare vendor ID and SFC4000 device IDs
* sfc: Validate IRQ moderation parameters in efx_init_irq_moderation()Ben Hutchings2011-09-161-2/+3
| | | | | | | | Add a range check, and move the check that RX and TX are consistent from efx_ethtool_set_coalesce(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Correct reporting and validation of TX interrupt coalescingBen Hutchings2011-09-161-0/+2
| | | | | | | | | | | | | The reported TX IRQ moderation is generated in a completely crazy way. Make it simple and correct. When channels are shared between RX and TX, TX IRQ moderation must be the same as RX IRQ moderation, but must be specified as 0! Allow it to be either specified as the same, or left at its previous value in which case it will be quietly overridden. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Use consistent types for interrupt coalescing parametersBen Hutchings2011-09-161-2/+2
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Move the Solarflare driversJeff Kirsher2011-08-111-0/+147
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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