BMC/Intel-BMC/linux.git/include/net/ncsi.h, branch dev-4.6

net/ncsi: Remove ncsi_stop_dev()

2016-06-03T20:51:47+00:00

This drops API ncsi_stop_dev() as it does nothing. Signed-off-by: Gavin Shan Signed-off-by: Joel Stanley

net/ncsi: Enumerate NCSI channels in advance

2016-06-03T20:51:46+00:00

All NCSI packages and channels are enumerated when user brings up the interface. The enumeration is heavy task and consumes lots of time. We can just do it for once when considering the fact: NCSI physical topology won't change. This enumerates NCSI packages and channels when user activates the interface for the first time, meaing the procedure won't be revisited when user reactivates the interface. The time consumed by it will be saved and the response time is improved. In order for it, we replace ncsi_dev_config() with ncsi_dev_probe() that is triggered on first call to ncsi_start_dev(). Similarly, the NCSI packages and channels are not released in ncsi_stop_dev() which is triggered when the interface is closed. It means the release is postponed until the interface is unregistered. Signed-off-by: Gavin Shan Signed-off-by: Joel Stanley

net/ncsi: Manage NCSI device

2016-06-03T20:51:45+00:00

There are multiple packages and channels connecting to NCSI enabled interface. The available packages and channels are probed with NCSI packets when NCSI device is started. Among the available packages and channels, only one channel should be selected to be active to provide service. When the active channel enters to failure state, we need choose another channel as active one to do failover. This implements the state machine to support above tasks. Also, the public interfaces are exposed for NIC driver to manage NCSI device. Signed-off-by: Gavin Shan Signed-off-by: Joel Stanley

net/ncsi: Resource management

2016-06-03T20:51:43+00:00

According to NCSI spec (DSP0222), the NCSI enabled interface can connected to multiple packages simultaneously, up to 8 packages. Each package includes multiple channels, up to 32 channels. At one moment, one channel is enabled to provide service to the NCSI enabled interface. Besides, each channel comprises capabilities, modes, filters, version and statistics etc. All of them are resources to NCSI protocol stack. At the meanwhile, the NCSI device seen from NIC driver is represented by "struct ncsi_dev", which is expected to populated and started by NIC driver before the NIC can work. All possible NCSI packages and NCSI channels connected to the NCSI interface are tracked from the NCSI device. Also, the NCSI device recognizes active channel that is currently providing service to NCSI enabled interface. Also, the NCSI requests (pairs of command and response) are embedded in NCSI device. This introduces the data structs to represents the NCSI resources mentioned as above. Also, functions used by NCSI stack internally are implemented. Besides, this introduces kernel config option CONFIG_NET_NCSI to enable NCSI stack. Signed-off-by: Gavin Shan