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2021-03-28ncsi: internal.h: Fix a spelloBhaskar Chowdhury
s/Firware/Firmware/ Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-09net/ncsi: Support for multi host mellanox cardVijay Khemka
Multi host Mellanox cards require MAC affinity to be set before receiving any config commands. All config commands should also have unicast address for source address in command header. Adding GMA and SMAF(Set Mac Affinity) for Mellanox card and call these in channel probe state machine if it is defined in device tree. Signed-off-by: Vijay Khemka <vijaykhemka@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-19net/ncsi: Disable global multicast filterVijay Khemka
Disabling multicast filtering from NCSI if it is supported. As it should not filter any multicast packets. In current code, multicast filter is enabled and with an exception of optional field supported by device are disabled filtering. Mainly I see if goal is to disable filtering for IPV6 packets then let it disabled for every other types as well. As we are seeing issues with LLDP not working with this enabled filtering. And there are other issues with IPV6. By Disabling this multicast completely, it is working for both IPV6 as well as LLDP. Signed-off-by: Vijay Khemka <vijaykhemka@fb.com> Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-27net/ncsi: Add NCSI Mellanox OEM commandVijay Khemka
This patch adds OEM Mellanox commands and response handling. It also defines OEM Get MAC Address handler to get and configure the device. ncsi_oem_gma_handler_mlx: This handler send NCSI mellanox command for getting mac address. ncsi_rsp_handler_oem_mlx: This handles response received for all mellanox OEM commands. ncsi_rsp_handler_oem_mlx_gma: This handles get mac address response and set it to device. Signed-off-by: Vijay Khemka <vijaykhemka@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-17net/ncsi: Configure multi-package, multi-channel modes with failoverSamuel Mendoza-Jonas
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>
2018-11-17net/ncsi: Reset channel state in ncsi_start_dev()Samuel Mendoza-Jonas
When the NCSI driver is stopped with ncsi_stop_dev() the channel monitors are stopped and the state set to "inactive". However the channels are still configured and active from the perspective of the network controller. We should suspend each active channel but in the context of ncsi_stop_dev() the transmit queue has been or is about to be stopped so we won't have time to do so. Instead when ncsi_start_dev() is called if the NCSI topology has already been probed then call ncsi_reset_dev() to suspend any channels that were previously active. This resets the network controller to a known state, provides an up to date view of channel link state, and makes sure that mode flags such as NCSI_MODE_TX_ENABLE are properly reset. In addition to ncsi_start_dev() use ncsi_reset_dev() in ncsi-netlink.c to update the channel configuration more cleanly. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-17net/ncsi: Probe single packages to avoid conflictSamuel Mendoza-Jonas
Currently the NCSI driver sends a select-package command to all possible packages simultaneously to discover what packages are available. However at this stage in the probe process the driver does not know if hardware arbitration is available: if it isn't then this process could cause collisions on the RMII bus when packages try to respond. Update the probe loop to probe each package one by one, and once complete check if HWA is universally supported. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-17net/ncsi: Add NCSI Broadcom OEM commandVijay Khemka
This patch adds OEM Broadcom commands and response handling. It also defines OEM Get MAC Address handler to get and configure the device. ncsi_oem_gma_handler_bcm: This handler send NCSI broadcom command for getting mac address. ncsi_rsp_handler_oem_bcm: This handles response received for all broadcom OEM commands. ncsi_rsp_handler_oem_bcm_gma: This handles get mac address response and set it to device. Signed-off-by: Vijay Khemka <vijaykhemka@fb.com> Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-15net/ncsi: Extend NC-SI Netlink interface to allow user space to send NC-SI ↵Justin.Lee1@Dell.com
command The new command (NCSI_CMD_SEND_CMD) is added to allow user space application to send NC-SI command to the network card. Also, add a new attribute (NCSI_ATTR_DATA) for transferring request and response. The work flow is as below. Request: User space application -> Netlink interface (msg) -> new Netlink handler - ncsi_send_cmd_nl() -> ncsi_xmit_cmd() Response: Response received - ncsi_rcv_rsp() -> internal response handler - ncsi_rsp_handler_xxx() -> ncsi_rsp_handler_netlink() -> ncsi_send_netlink_rsp () -> Netlink interface (msg) -> user space application Command timeout - ncsi_request_timeout() -> ncsi_send_netlink_timeout () -> Netlink interface (msg with zero data length) -> user space application Error: Error detected -> ncsi_send_netlink_err () -> Netlink interface (err msg) -> user space application Signed-off-by: Justin Lee <justin.lee1@dell.com> Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-05net/ncsi: Add NCSI OEM command supportVijay Khemka
This patch adds OEM commands and response handling. It also defines OEM command and response structure as per NCSI specification along with its handlers. ncsi_cmd_handler_oem: This is a generic command request handler for OEM commands ncsi_rsp_handler_oem: This is a generic response handler for OEM commands Signed-off-by: Vijay Khemka <vijaykhemka@fb.com> Reviewed-by: Justin Lee <justin.lee1@dell.com> Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-04-17net/ncsi: Refactor MAC, VLAN filtersSamuel Mendoza-Jonas
The NCSI driver defines a generic ncsi_channel_filter struct that can be used to store arbitrarily formatted filters, and several generic methods of accessing data stored in such a filter. However in both the driver and as defined in the NCSI specification there are only two actual filters: VLAN ID filters and MAC address filters. The splitting of the MAC filter into unicast, multicast, and mixed is also technically not necessary as these are stored in the same location in hardware. To save complexity, particularly in the set up and accessing of these generic filters, remove them in favour of two specific structs. These can be acted on directly and do not need several generic helper functions to use. This also fixes a memory error found by KASAN on ARM32 (which is not upstream yet), where response handlers accessing a filter's data field could write past allocated memory. [ 114.926512] ================================================================== [ 114.933861] BUG: KASAN: slab-out-of-bounds in ncsi_configure_channel+0x4b8/0xc58 [ 114.941304] Read of size 2 at addr 94888558 by task kworker/0:2/546 [ 114.947593] [ 114.949146] CPU: 0 PID: 546 Comm: kworker/0:2 Not tainted 4.16.0-rc6-00119-ge156398bfcad #13 ... [ 115.170233] The buggy address belongs to the object at 94888540 [ 115.170233] which belongs to the cache kmalloc-32 of size 32 [ 115.181917] The buggy address is located 24 bytes inside of [ 115.181917] 32-byte region [94888540, 94888560) [ 115.192115] The buggy address belongs to the page: [ 115.196943] page:9eeac100 count:1 mapcount:0 mapping:94888000 index:0x94888fc1 [ 115.204200] flags: 0x100(slab) [ 115.207330] raw: 00000100 94888000 94888fc1 0000003f 00000001 9eea2014 9eecaa74 96c003e0 [ 115.215444] page dumped because: kasan: bad access detected [ 115.221036] [ 115.222544] Memory state around the buggy address: [ 115.227384] 94888400: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc [ 115.233959] 94888480: 00 00 00 fc fc fc fc fc 00 04 fc fc fc fc fc fc [ 115.240529] >94888500: 00 00 04 fc fc fc fc fc 00 00 04 fc fc fc fc fc [ 115.247077] ^ [ 115.252523] 94888580: 00 04 fc fc fc fc fc fc 06 fc fc fc fc fc fc fc [ 115.259093] 94888600: 00 00 06 fc fc fc fc fc 00 00 04 fc fc fc fc fc [ 115.265639] ================================================================== Reported-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-05net/ncsi: Add generic netlink familySamuel Mendoza-Jonas
Add a generic netlink family for NCSI. This supports three commands; NCSI_CMD_PKG_INFO which returns information on packages and their associated channels, NCSI_CMD_SET_INTERFACE which allows a specific package or package/channel combination to be set as the preferred choice, and NCSI_CMD_CLEAR_INTERFACE which clears any preferred setting. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-11net/ncsi: Don't limit vids based on hot_channelSamuel Mendoza-Jonas
Currently we drop any new VLAN ids if there are more than the current (or last used) channel can support. Most importantly this is a problem if no channel has been selected yet, resulting in a segfault. Secondly this does not necessarily reflect the capabilities of any other channels. Instead only drop a new VLAN id if we are already tracking the maximum allowed by the NCSI specification. Per-channel limits are already handled by ncsi_add_filter(), but add a message to set_one_vid() to make it obvious that the channel can not support any more VLAN ids. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-28net/ncsi: Configure VLAN tag filterSamuel Mendoza-Jonas
Make use of the ndo_vlan_rx_{add,kill}_vid callbacks to have the NCSI stack process new VLAN tags and configure the channel VLAN filter appropriately. Several VLAN tags can be set and a "Set VLAN Filter" packet must be sent for each one, meaning the ncsi_dev_state_config_svf state must be repeated. An internal list of VLAN tags is maintained, and compared against the current channel's ncsi_channel_filter in order to keep track within the state. VLAN filters are removed in a similar manner, with the introduction of the ncsi_dev_state_config_clear_vids state. The maximum number of VLAN tag filters is determined by the "Get Capabilities" response from the channel. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-20net/ncsi: Choose hot channel as active one if necessaryGavin Shan
The issue was found on BCM5718 which has two NCSI channels in one package: C0 and C1. C0 is in link-up state while C1 is in link-down state. C0 is chosen as active channel until unplugging and plugging C0's cable: On unplugging C0's cable, LSC (Link State Change) AEN packet received on C0 to report link-down event. After that, C1 is chosen as active channel. LSC AEN for link-up event is lost on C0 when plugging C0's cable back. We lose the network even C0 is usable. This resolves the issue by recording the (hot) channel that was ever chosen as active one. The hot channel is chosen to be active one if none of available channels in link-up state. With this, C0 is still the active one after unplugging C0's cable. LSC AEN packet received on C0 when plugging its cable back. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-20net/ncsi: Fix stale link state of inactive channels on failoverGavin Shan
The issue was found on BCM5718 which has two NCSI channels in one package: C0 and C1. Both of them are connected to different LANs, means they are in link-up state and C0 is chosen as the active one until resetting BCM5718 happens as below. Resetting BCM5718 results in LSC (Link State Change) AEN packet received on C0, meaning LSC AEN is missed on C1. When LSC AEN packet received on C0 to report link-down, it fails over to C1 because C1 is in link-up state as software can see. However, C1 is in link-down state in hardware. It means the link state is out of synchronization between hardware and software, resulting in inappropriate channel (C1) selected as active one. This resolves the issue by sending separate GLS (Get Link Status) commands to all channels in the package before trying to do failover. The last link states of all channels in the package are retrieved. With it, C0 (not C1) is selected as active one as expected. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04net/ncsi: Rework the channel monitoringGavin Shan
The original NCSI channel monitoring was implemented based on a backoff algorithm: the GLS response should be received in the specified interval. Otherwise, the channel is regarded as dead and failover should be taken if current channel is an active one. There are several problems in the implementation: (A) On BCM5718, we found when the IID (Instance ID) in the GLS command packet changes from 255 to 1, the response corresponding to IID#1 never comes in. It means we cannot make the unfair judgement that the channel is dead when one response is missed. (B) The code's readability should be improved. (C) We should do failover when current channel is active one and the channel monitoring should be marked as disabled before doing failover. This reworks the channel monitoring to address all above issues. The fields for channel monitoring is put into separate struct and the state of channel monitoring is predefined. The channel is regarded alive if the network controller responses to one of two GLS commands or both of them in 5 seconds. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04net/ncsi: Allow to extend NCSI request propertiesGavin Shan
There is only one NCSI request property for now: the response for the sent command need drive the workqueue or not. So we had one field (@driven) for the purpose. We lost the flexibility to extend NCSI request properties. This replaces @driven with @flags and @req_flags in NCSI request and NCSI command argument struct. Each bit of the newly introduced field can be used for one property. No functional changes introduced. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04net/ncsi: Rework request index allocationGavin Shan
The NCSI request index (struct ncsi_request::id) is put into instance ID (IID) field while sending NCSI command packet. It was designed the available IDs are given in round-robin fashion. @ndp->request_id was introduced to represent the next available ID, but it has been used as number of successively allocated IDs. It breaks the round-robin design. Besides, we shouldn't put 0 to NCSI command packet's IID field, meaning ID#0 should be reserved according section 6.3.1.1 in NCSI spec (v1.1.0). This fixes above two issues. With it applied, the available IDs will be assigned in round-robin fashion and ID#0 won't be assigned. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04net/ncsi: Introduce NCSI_RESERVED_CHANNELGavin Shan
This defines NCSI_RESERVED_CHANNEL as the reserved NCSI channel ID (0x1f). No logical changes introduced. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-19net/ncsi: NCSI AEN packet handlerGavin Shan
This introduces NCSI AEN packet handlers that result in (A) the currently active channel is reconfigured; (B) Currently active channel is deconfigured and disabled, another channel is chosen as active one and configured. Case (B) won't happen if hardware arbitration has been enabled, the channel that was in active state is suspended simply. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-19net/ncsi: Package and channel managementGavin Shan
This manages NCSI packages and channels: * The available packages and channels are enumerated in the first time of calling ncsi_start_dev(). The channels' capabilities are probed in the meanwhile. The NCSI network topology won't change until the NCSI device is destroyed. * There in a queue in every NCSI device. The element in the queue, channel, is waiting for configuration (bringup) or suspending (teardown). The channel's state (inactive/active) indicates the futher action (configuration or suspending) will be applied on the channel. Another channel's state (invisible) means the requested action is being applied. * The hardware arbitration will be enabled if all available packages and channels support it. All available channels try to provide service when hardware arbitration is enabled. Otherwise, one channel is selected as the active one at once. * When channel is in active state, meaning it's providing service, a timer started to retrieve the channe's link status. If the channel's link status fails to be updated in the determined period, the channel is going to be reconfigured. It's the error handling implementation as defined in NCSI spec. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-19net/ncsi: NCSI response packet handlerGavin Shan
The NCSI response packets are sent to MC (Management Controller) from the remote end. They are responses of NCSI command packets for multiple purposes: completion status of NCSI command packets, return NCSI channel's capability or configuration etc. This defines struct to represent NCSI response packets and introduces function ncsi_rcv_rsp() which will be used to receive NCSI response packets and parse them. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-19net/ncsi: NCSI command packet handlerGavin Shan
The NCSI command packets are sent from MC (Management Controller) to remote end. They are used for multiple purposes: probe existing NCSI package/channel, retrieve NCSI channel's capability, configure NCSI channel etc. This defines struct to represent NCSI command packets and introduces function ncsi_xmit_cmd(), which will be used to transmit NCSI command packet according to the request. The request is represented by struct ncsi_cmd_arg. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-19net/ncsi: Resource managementGavin Shan
NCSI spec (DSP0222) defines several objects: package, channel, mode, filter, version and statistics etc. This introduces the data structs to represent those objects and implement functions to manage them. Also, this introduces CONFIG_NET_NCSI for the newly implemented NCSI stack. * The user (e.g. netdev driver) dereference NCSI device by "struct ncsi_dev", which is embedded to "struct ncsi_dev_priv". The later one is used by NCSI stack internally. * Every NCSI device can have multiple packages simultaneously, up to 8 packages. It's represented by "struct ncsi_package" and identified by 3-bits ID. * Every NCSI package can have multiple channels, up to 32. It's represented by "struct ncsi_channel" and identified by 5-bits ID. * Every NCSI channel has version, statistics, various modes and filters. They are represented by "struct ncsi_channel_version", "struct ncsi_channel_stats", "struct ncsi_channel_mode" and "struct ncsi_channel_filter" separately. * Apart from AEN (Asynchronous Event Notification), the NCSI stack works in terms of command and response. This introduces "struct ncsi_req" to represent a complete NCSI transaction made of NCSI request and response. link: https://www.dmtf.org/sites/default/files/standards/documents/DSP0222_1.1.0.pdf Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>