kernel/drivers/net/ethernet/sfc/efx.h, branch linux-4.3.y

sfc: Allow driver to cope with a lower number of VIs than it needs for RSS

2015-08-28T20:53:47Z

Previously, the driver would refuse to load if it couldn't secure enough VIs from the MC to fulfill its RSS requirements. This was causing probe to fail on later functions in configurations where we'd run out of VIs, such as having many VFs. This change allows the driver to load with fewer VIs, down to a minimum of 2. A warning will be printed saying that RSS requirements were not met, possibly affecting performance. efx->max_tx_channels needs to be set to avoid going down the failure path in efx_probe_nic() immediately in the loop after the probe() NIC-type function. Also, Set rc=ENOSPC when bombing out of efx_probe_nic due to lack of VIs. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: add ndo_set_vf_mac() function for EF10

2015-05-21T22:43:54Z

Implement a response to this entrypoint. The ndo_set_vf_mac() entrypoint is only exposed in the driver if CONFIG_SFC_SRIOV is defined. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: protect filter table against use-after-free

2015-05-21T22:43:53Z

If MCDI timeouts are encountered during efx_ef10_filter_table_remove(), an FLR will be queued, but efx->filter_state will still be kfree()d. The queued FLR will then call efx_ef10_filter_table_restore(), which will try to use efx->filter_state. This previously caused a panic. This patch adds an rwsem to protect the existence of efx->filter_state, separately from the spinlock protecting its contents. Users which can race against efx_ef10_filter_table_remove() should down_read this rwsem. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: Add use of shared RSS contexts.

2015-05-09T20:16:48Z

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 Signed-off-by: David S. Miller

sfc: Prepare to bind the sfc driver to the VF.

2015-05-09T20:16:47Z

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 Signed-off-by: David S. Miller

sfc: Own header for nic-specific sriov functions, single instance of netdev_ops and sriov removed from Falcon code

2015-05-09T20:16:46Z

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 Signed-off-by: David S. Miller

sfc: Add support for busy polling

2014-07-23T02:55:20Z

This patch adds the sfc driver code for implementing busy polling. It adds ndo_busy_poll method and locking between it and napi poll. It also adds each napi to the napi_hash right after netif_napi_add(). Uses efx_start_eventq and efx_stop_eventq in the self tests. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: add extra RX drop counters for nodesc_trunc and noskb_drop

2014-07-16T05:53:34Z

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 Signed-off-by: David S. Miller

sfc: Update product naming

2014-02-12T22:53:35Z

We don't use 'Solarstorm' or 'Solarflare Communications' in full any more. Signed-off-by: Ben Hutchings Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: Use the correct maximum TX DMA ring size for SFC9100

2014-01-23T21:40:51Z

As part of a workaround for a hardware erratum in the SFC9100 family (SF bug 35388), the TX_DESC_UPD_DWORD register address is also used for communicating with the event block, and only descriptor pointer values < 2048 are valid. If the TX DMA ring size is increased to 4096 descriptors (which the firmware still allows) then we may write a descriptor pointer value >= 2048, which has entirely different and undesirable effects! Limit the TX DMA ring size correctly when this workaround is in effect. Fixes: 8127d661e77f ('sfc: Add support for Solarflare SFC9100 family') Signed-off-by: Ben Hutchings Signed-off-by: Shradha Shah Signed-off-by: David S. Miller