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net/ncsi: Configure multi-package, multi-channel modes with failover

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This patch extends the ncsi-netlink interface with two new commands and
three new attributes to configure multiple packages and/or channels at
once, and configure specific failover modes.

NCSI_CMD_SET_PACKAGE mask and NCSI_CMD_SET_CHANNEL_MASK set a whitelist
of packages or channels allowed to be configured with the
NCSI_ATTR_PACKAGE_MASK and NCSI_ATTR_CHANNEL_MASK attributes
respectively. If one of these whitelists is set only packages or
channels matching the whitelist are considered for the channel queue in
ncsi_choose_active_channel().

These commands may also use the NCSI_ATTR_MULTI_FLAG to signal that
multiple packages or channels may be configured simultaneously. NCSI
hardware arbitration (HWA) must be available in order to enable
multi-package mode. Multi-channel mode is always available.

If the NCSI_ATTR_CHANNEL_ID attribute is present in the
NCSI_CMD_SET_CHANNEL_MASK command the it sets the preferred channel as
with the NCSI_CMD_SET_INTERFACE command. The combination of preferred
channel and channel whitelist defines a primary channel and the allowed
failover channels.
If the NCSI_ATTR_MULTI_FLAG attribute is also present then the preferred
channel is configured for Tx/Rx and the other channels are enabled only
for Rx.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Samuel Mendoza-Jonas
2018-11-16 15:51:59 +11:00
committed by David S. Miller
parent 2878a2cfe5
commit 8d951a75d0
6 changed files with 493 additions and 88 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
include/uapi/linux/ncsi.h
View File

@@ -26,6 +26,12 @@
* @NCSI_CMD_SEND_CMD: send NC-SI command to network card.
* Requires NCSI_ATTR_IFINDEX, NCSI_ATTR_PACKAGE_ID
* and NCSI_ATTR_CHANNEL_ID.
* @NCSI_CMD_SET_PACKAGE_MASK: set a whitelist of allowed packages.
* Requires NCSI_ATTR_IFINDEX and NCSI_ATTR_PACKAGE_MASK.
* @NCSI_CMD_SET_CHANNEL_MASK: set a whitelist of allowed channels.
* Requires NCSI_ATTR_IFINDEX, NCSI_ATTR_PACKAGE_ID, and
* NCSI_ATTR_CHANNEL_MASK. If NCSI_ATTR_CHANNEL_ID is present it sets
* the primary channel.
* @NCSI_CMD_MAX: highest command number
*/
enum ncsi_nl_commands {
@@ -34,6 +40,8 @@ enum ncsi_nl_commands {
NCSI_CMD_SET_INTERFACE,
NCSI_CMD_CLEAR_INTERFACE,
NCSI_CMD_SEND_CMD,
NCSI_CMD_SET_PACKAGE_MASK,
NCSI_CMD_SET_CHANNEL_MASK,
__NCSI_CMD_AFTER_LAST,
NCSI_CMD_MAX = __NCSI_CMD_AFTER_LAST - 1
@@ -48,6 +56,10 @@ enum ncsi_nl_commands {
* @NCSI_ATTR_PACKAGE_ID: package ID
* @NCSI_ATTR_CHANNEL_ID: channel ID
* @NCSI_ATTR_DATA: command payload
* @NCSI_ATTR_MULTI_FLAG: flag to signal that multi-mode should be enabled with
* NCSI_CMD_SET_PACKAGE_MASK or NCSI_CMD_SET_CHANNEL_MASK.
* @NCSI_ATTR_PACKAGE_MASK: 32-bit mask of allowed packages.
* @NCSI_ATTR_CHANNEL_MASK: 32-bit mask of allowed channels.
* @NCSI_ATTR_MAX: highest attribute number
*/
enum ncsi_nl_attrs {
@@ -57,6 +69,9 @@ enum ncsi_nl_attrs {
NCSI_ATTR_PACKAGE_ID,
NCSI_ATTR_CHANNEL_ID,
NCSI_ATTR_DATA,
NCSI_ATTR_MULTI_FLAG,
NCSI_ATTR_PACKAGE_MASK,
NCSI_ATTR_CHANNEL_MASK,
__NCSI_ATTR_AFTER_LAST,
NCSI_ATTR_MAX = __NCSI_ATTR_AFTER_LAST - 1