summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/sfc/Kconfig
diff options
context:
space:
mode:
authorBen Hutchings <bhutchings@solarflare.com>2012-02-14 04:48:07 +0400
committerBen Hutchings <bhutchings@solarflare.com>2012-02-16 04:25:13 +0400
commitcd2d5b529cdb9bd274f3e4bc68d37d4d63b7f383 (patch)
treef21a5f98185b8e227b843a28b54d4260a0e57033 /drivers/net/ethernet/sfc/Kconfig
parent28e47c498a931200125e299e9d60d22e27b4ab0d (diff)
downloadlinux-cd2d5b529cdb9bd274f3e4bc68d37d4d63b7f383.tar.xz
sfc: Add SR-IOV back-end support for SFC9000 family
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>
Diffstat (limited to 'drivers/net/ethernet/sfc/Kconfig')
-rw-r--r--drivers/net/ethernet/sfc/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig
index 8d423544a7e6..fb3cbc27063c 100644
--- a/drivers/net/ethernet/sfc/Kconfig
+++ b/drivers/net/ethernet/sfc/Kconfig
@@ -26,3 +26,11 @@ config SFC_MCDI_MON
----help---
This exposes the on-board firmware-managed sensors as a
hardware monitor device.
+config SFC_SRIOV
+ bool "Solarflare SFC9000-family SR-IOV support"
+ depends on SFC && PCI_IOV
+ default y
+ ---help---
+ This enables support for the SFC9000 I/O Virtualization
+ features, allowing accelerated network performance in
+ virtualized environments.