diff options
author | Jakub Kicinski <kuba@kernel.org> | 2020-06-26 20:27:28 +0300 |
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committer | David S. Miller <davem@davemloft.net> | 2020-06-27 02:08:45 +0300 |
commit | 95298d63c67673c654c08952672d016212b26054 (patch) | |
tree | 07117d0dd0c1a07fbff6fa3dc1724cbd3aa100ef /Documentation/networking/device_drivers | |
parent | 5c3b5da432bcf6db822adee3e40da9b454369d31 (diff) | |
download | linux-95298d63c67673c654c08952672d016212b26054.tar.xz |
docs: networking: move remaining Ethernet driver docs to the hw section
Move docs for hinic and altera_tse under device_drivers/ethernet.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/device_drivers')
3 files changed, 416 insertions, 0 deletions
diff --git a/Documentation/networking/device_drivers/ethernet/altera/altera_tse.rst b/Documentation/networking/device_drivers/ethernet/altera/altera_tse.rst new file mode 100644 index 000000000000..7a7040072e58 --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/altera/altera_tse.rst @@ -0,0 +1,286 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. include:: <isonum.txt> + +======================================= +Altera Triple-Speed Ethernet MAC driver +======================================= + +Copyright |copy| 2008-2014 Altera Corporation + +This is the driver for the Altera Triple-Speed Ethernet (TSE) controllers +using the SGDMA and MSGDMA soft DMA IP components. The driver uses the +platform bus to obtain component resources. The designs used to test this +driver were built for a Cyclone(R) V SOC FPGA board, a Cyclone(R) V FPGA board, +and tested with ARM and NIOS processor hosts separately. The anticipated use +cases are simple communications between an embedded system and an external peer +for status and simple configuration of the embedded system. + +For more information visit www.altera.com and www.rocketboards.org. Support +forums for the driver may be found on www.rocketboards.org, and a design used +to test this driver may be found there as well. Support is also available from +the maintainer of this driver, found in MAINTAINERS. + +The Triple-Speed Ethernet, SGDMA, and MSGDMA components are all soft IP +components that can be assembled and built into an FPGA using the Altera +Quartus toolchain. Quartus 13.1 and 14.0 were used to build the design that +this driver was tested against. The sopc2dts tool is used to create the +device tree for the driver, and may be found at rocketboards.org. + +The driver probe function examines the device tree and determines if the +Triple-Speed Ethernet instance is using an SGDMA or MSGDMA component. The +probe function then installs the appropriate set of DMA routines to +initialize, setup transmits, receives, and interrupt handling primitives for +the respective configurations. + +The SGDMA component is to be deprecated in the near future (over the next 1-2 +years as of this writing in early 2014) in favor of the MSGDMA component. +SGDMA support is included for existing designs and reference in case a +developer wishes to support their own soft DMA logic and driver support. Any +new designs should not use the SGDMA. + +The SGDMA supports only a single transmit or receive operation at a time, and +therefore will not perform as well compared to the MSGDMA soft IP. Please +visit www.altera.com for known, documented SGDMA errata. + +Scatter-gather DMA is not supported by the SGDMA or MSGDMA at this time. +Scatter-gather DMA will be added to a future maintenance update to this +driver. + +Jumbo frames are not supported at this time. + +The driver limits PHY operations to 10/100Mbps, and has not yet been fully +tested for 1Gbps. This support will be added in a future maintenance update. + +1. Kernel Configuration +======================= + +The kernel configuration option is ALTERA_TSE: + + Device Drivers ---> Network device support ---> Ethernet driver support ---> + Altera Triple-Speed Ethernet MAC support (ALTERA_TSE) + +2. Driver parameters list +========================= + + - debug: message level (0: no output, 16: all); + - dma_rx_num: Number of descriptors in the RX list (default is 64); + - dma_tx_num: Number of descriptors in the TX list (default is 64). + +3. Command line options +======================= + +Driver parameters can be also passed in command line by using:: + + altera_tse=dma_rx_num:128,dma_tx_num:512 + +4. Driver information and notes +=============================== + +4.1. Transmit process +--------------------- +When the driver's transmit routine is called by the kernel, it sets up a +transmit descriptor by calling the underlying DMA transmit routine (SGDMA or +MSGDMA), and initiates a transmit operation. Once the transmit is complete, an +interrupt is driven by the transmit DMA logic. The driver handles the transmit +completion in the context of the interrupt handling chain by recycling +resource required to send and track the requested transmit operation. + +4.2. Receive process +-------------------- +The driver will post receive buffers to the receive DMA logic during driver +initialization. Receive buffers may or may not be queued depending upon the +underlying DMA logic (MSGDMA is able queue receive buffers, SGDMA is not able +to queue receive buffers to the SGDMA receive logic). When a packet is +received, the DMA logic generates an interrupt. The driver handles a receive +interrupt by obtaining the DMA receive logic status, reaping receive +completions until no more receive completions are available. + +4.3. Interrupt Mitigation +------------------------- +The driver is able to mitigate the number of its DMA interrupts +using NAPI for receive operations. Interrupt mitigation is not yet supported +for transmit operations, but will be added in a future maintenance release. + +4.4) Ethtool support +-------------------- +Ethtool is supported. Driver statistics and internal errors can be taken using: +ethtool -S ethX command. It is possible to dump registers etc. + +4.5) PHY Support +---------------- +The driver is compatible with PAL to work with PHY and GPHY devices. + +4.7) List of source files: +-------------------------- + - Kconfig + - Makefile + - altera_tse_main.c: main network device driver + - altera_tse_ethtool.c: ethtool support + - altera_tse.h: private driver structure and common definitions + - altera_msgdma.h: MSGDMA implementation function definitions + - altera_sgdma.h: SGDMA implementation function definitions + - altera_msgdma.c: MSGDMA implementation + - altera_sgdma.c: SGDMA implementation + - altera_sgdmahw.h: SGDMA register and descriptor definitions + - altera_msgdmahw.h: MSGDMA register and descriptor definitions + - altera_utils.c: Driver utility functions + - altera_utils.h: Driver utility function definitions + +5. Debug Information +==================== + +The driver exports debug information such as internal statistics, +debug information, MAC and DMA registers etc. + +A user may use the ethtool support to get statistics: +e.g. using: ethtool -S ethX (that shows the statistics counters) +or sees the MAC registers: e.g. using: ethtool -d ethX + +The developer can also use the "debug" module parameter to get +further debug information. + +6. Statistics Support +===================== + +The controller and driver support a mix of IEEE standard defined statistics, +RFC defined statistics, and driver or Altera defined statistics. The four +specifications containing the standard definitions for these statistics are +as follows: + + - IEEE 802.3-2012 - IEEE Standard for Ethernet. + - RFC 2863 found at http://www.rfc-editor.org/rfc/rfc2863.txt. + - RFC 2819 found at http://www.rfc-editor.org/rfc/rfc2819.txt. + - Altera Triple Speed Ethernet User Guide, found at http://www.altera.com + +The statistics supported by the TSE and the device driver are as follows: + +"tx_packets" is equivalent to aFramesTransmittedOK defined in IEEE 802.3-2012, +Section 5.2.2.1.2. This statistics is the count of frames that are successfully +transmitted. + +"rx_packets" is equivalent to aFramesReceivedOK defined in IEEE 802.3-2012, +Section 5.2.2.1.5. This statistic is the count of frames that are successfully +received. This count does not include any error packets such as CRC errors, +length errors, or alignment errors. + +"rx_crc_errors" is equivalent to aFrameCheckSequenceErrors defined in IEEE +802.3-2012, Section 5.2.2.1.6. This statistic is the count of frames that are +an integral number of bytes in length and do not pass the CRC test as the frame +is received. + +"rx_align_errors" is equivalent to aAlignmentErrors defined in IEEE 802.3-2012, +Section 5.2.2.1.7. This statistic is the count of frames that are not an +integral number of bytes in length and do not pass the CRC test as the frame is +received. + +"tx_bytes" is equivalent to aOctetsTransmittedOK defined in IEEE 802.3-2012, +Section 5.2.2.1.8. This statistic is the count of data and pad bytes +successfully transmitted from the interface. + +"rx_bytes" is equivalent to aOctetsReceivedOK defined in IEEE 802.3-2012, +Section 5.2.2.1.14. This statistic is the count of data and pad bytes +successfully received by the controller. + +"tx_pause" is equivalent to aPAUSEMACCtrlFramesTransmitted defined in IEEE +802.3-2012, Section 30.3.4.2. This statistic is a count of PAUSE frames +transmitted from the network controller. + +"rx_pause" is equivalent to aPAUSEMACCtrlFramesReceived defined in IEEE +802.3-2012, Section 30.3.4.3. This statistic is a count of PAUSE frames +received by the network controller. + +"rx_errors" is equivalent to ifInErrors defined in RFC 2863. This statistic is +a count of the number of packets received containing errors that prevented the +packet from being delivered to a higher level protocol. + +"tx_errors" is equivalent to ifOutErrors defined in RFC 2863. This statistic +is a count of the number of packets that could not be transmitted due to errors. + +"rx_unicast" is equivalent to ifInUcastPkts defined in RFC 2863. This +statistic is a count of the number of packets received that were not addressed +to the broadcast address or a multicast group. + +"rx_multicast" is equivalent to ifInMulticastPkts defined in RFC 2863. This +statistic is a count of the number of packets received that were addressed to +a multicast address group. + +"rx_broadcast" is equivalent to ifInBroadcastPkts defined in RFC 2863. This +statistic is a count of the number of packets received that were addressed to +the broadcast address. + +"tx_discards" is equivalent to ifOutDiscards defined in RFC 2863. This +statistic is the number of outbound packets not transmitted even though an +error was not detected. An example of a reason this might occur is to free up +internal buffer space. + +"tx_unicast" is equivalent to ifOutUcastPkts defined in RFC 2863. This +statistic counts the number of packets transmitted that were not addressed to +a multicast group or broadcast address. + +"tx_multicast" is equivalent to ifOutMulticastPkts defined in RFC 2863. This +statistic counts the number of packets transmitted that were addressed to a +multicast group. + +"tx_broadcast" is equivalent to ifOutBroadcastPkts defined in RFC 2863. This +statistic counts the number of packets transmitted that were addressed to a +broadcast address. + +"ether_drops" is equivalent to etherStatsDropEvents defined in RFC 2819. +This statistic counts the number of packets dropped due to lack of internal +controller resources. + +"rx_total_bytes" is equivalent to etherStatsOctets defined in RFC 2819. +This statistic counts the total number of bytes received by the controller, +including error and discarded packets. + +"rx_total_packets" is equivalent to etherStatsPkts defined in RFC 2819. +This statistic counts the total number of packets received by the controller, +including error, discarded, unicast, multicast, and broadcast packets. + +"rx_undersize" is equivalent to etherStatsUndersizePkts defined in RFC 2819. +This statistic counts the number of correctly formed packets received less +than 64 bytes long. + +"rx_oversize" is equivalent to etherStatsOversizePkts defined in RFC 2819. +This statistic counts the number of correctly formed packets greater than 1518 +bytes long. + +"rx_64_bytes" is equivalent to etherStatsPkts64Octets defined in RFC 2819. +This statistic counts the total number of packets received that were 64 octets +in length. + +"rx_65_127_bytes" is equivalent to etherStatsPkts65to127Octets defined in RFC +2819. This statistic counts the total number of packets received that were +between 65 and 127 octets in length inclusive. + +"rx_128_255_bytes" is equivalent to etherStatsPkts128to255Octets defined in +RFC 2819. This statistic is the total number of packets received that were +between 128 and 255 octets in length inclusive. + +"rx_256_511_bytes" is equivalent to etherStatsPkts256to511Octets defined in +RFC 2819. This statistic is the total number of packets received that were +between 256 and 511 octets in length inclusive. + +"rx_512_1023_bytes" is equivalent to etherStatsPkts512to1023Octets defined in +RFC 2819. This statistic is the total number of packets received that were +between 512 and 1023 octets in length inclusive. + +"rx_1024_1518_bytes" is equivalent to etherStatsPkts1024to1518Octets define +in RFC 2819. This statistic is the total number of packets received that were +between 1024 and 1518 octets in length inclusive. + +"rx_gte_1519_bytes" is a statistic defined specific to the behavior of the +Altera TSE. This statistics counts the number of received good and errored +frames between the length of 1519 and the maximum frame length configured +in the frm_length register. See the Altera TSE User Guide for More details. + +"rx_jabbers" is equivalent to etherStatsJabbers defined in RFC 2819. This +statistic is the total number of packets received that were longer than 1518 +octets, and had either a bad CRC with an integral number of octets (CRC Error) +or a bad CRC with a non-integral number of octets (Alignment Error). + +"rx_runts" is equivalent to etherStatsFragments defined in RFC 2819. This +statistic is the total number of packets received that were less than 64 octets +in length and had either a bad CRC with an integral number of octets (CRC +error) or a bad CRC with a non-integral number of octets (Alignment Error). diff --git a/Documentation/networking/device_drivers/ethernet/huawei/hinic.rst b/Documentation/networking/device_drivers/ethernet/huawei/hinic.rst new file mode 100644 index 000000000000..867ac8f4e04a --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/huawei/hinic.rst @@ -0,0 +1,128 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================================================ +Linux Kernel Driver for Huawei Intelligent NIC(HiNIC) family +============================================================ + +Overview: +========= +HiNIC is a network interface card for the Data Center Area. + +The driver supports a range of link-speed devices (10GbE, 25GbE, 40GbE, etc.). +The driver supports also a negotiated and extendable feature set. + +Some HiNIC devices support SR-IOV. This driver is used for Physical Function +(PF). + +HiNIC devices support MSI-X interrupt vector for each Tx/Rx queue and +adaptive interrupt moderation. + +HiNIC devices support also various offload features such as checksum offload, +TCP Transmit Segmentation Offload(TSO), Receive-Side Scaling(RSS) and +LRO(Large Receive Offload). + + +Supported PCI vendor ID/device IDs: +=================================== + +19e5:1822 - HiNIC PF + + +Driver Architecture and Source Code: +==================================== + +hinic_dev - Implement a Logical Network device that is independent from +specific HW details about HW data structure formats. + +hinic_hwdev - Implement the HW details of the device and include the components +for accessing the PCI NIC. + +hinic_hwdev contains the following components: +=============================================== + +HW Interface: +============= + +The interface for accessing the pci device (DMA memory and PCI BARs). +(hinic_hw_if.c, hinic_hw_if.h) + +Configuration Status Registers Area that describes the HW Registers on the +configuration and status BAR0. (hinic_hw_csr.h) + +MGMT components: +================ + +Asynchronous Event Queues(AEQs) - The event queues for receiving messages from +the MGMT modules on the cards. (hinic_hw_eqs.c, hinic_hw_eqs.h) + +Application Programmable Interface commands(API CMD) - Interface for sending +MGMT commands to the card. (hinic_hw_api_cmd.c, hinic_hw_api_cmd.h) + +Management (MGMT) - the PF to MGMT channel that uses API CMD for sending MGMT +commands to the card and receives notifications from the MGMT modules on the +card by AEQs. Also set the addresses of the IO CMDQs in HW. +(hinic_hw_mgmt.c, hinic_hw_mgmt.h) + +IO components: +============== + +Completion Event Queues(CEQs) - The completion Event Queues that describe IO +tasks that are finished. (hinic_hw_eqs.c, hinic_hw_eqs.h) + +Work Queues(WQ) - Contain the memory and operations for use by CMD queues and +the Queue Pairs. The WQ is a Memory Block in a Page. The Block contains +pointers to Memory Areas that are the Memory for the Work Queue Elements(WQEs). +(hinic_hw_wq.c, hinic_hw_wq.h) + +Command Queues(CMDQ) - The queues for sending commands for IO management and is +used to set the QPs addresses in HW. The commands completion events are +accumulated on the CEQ that is configured to receive the CMDQ completion events. +(hinic_hw_cmdq.c, hinic_hw_cmdq.h) + +Queue Pairs(QPs) - The HW Receive and Send queues for Receiving and Transmitting +Data. (hinic_hw_qp.c, hinic_hw_qp.h, hinic_hw_qp_ctxt.h) + +IO - de/constructs all the IO components. (hinic_hw_io.c, hinic_hw_io.h) + +HW device: +========== + +HW device - de/constructs the HW Interface, the MGMT components on the +initialization of the driver and the IO components on the case of Interface +UP/DOWN Events. (hinic_hw_dev.c, hinic_hw_dev.h) + + +hinic_dev contains the following components: +=============================================== + +PCI ID table - Contains the supported PCI Vendor/Device IDs. +(hinic_pci_tbl.h) + +Port Commands - Send commands to the HW device for port management +(MAC, Vlan, MTU, ...). (hinic_port.c, hinic_port.h) + +Tx Queues - Logical Tx Queues that use the HW Send Queues for transmit. +The Logical Tx queue is not dependent on the format of the HW Send Queue. +(hinic_tx.c, hinic_tx.h) + +Rx Queues - Logical Rx Queues that use the HW Receive Queues for receive. +The Logical Rx queue is not dependent on the format of the HW Receive Queue. +(hinic_rx.c, hinic_rx.h) + +hinic_dev - de/constructs the Logical Tx and Rx Queues. +(hinic_main.c, hinic_dev.h) + + +Miscellaneous +============= + +Common functions that are used by HW and Logical Device. +(hinic_common.c, hinic_common.h) + + +Support +======= + +If an issue is identified with the released source code on the supported kernel +with a supported adapter, email the specific information related to the issue to +aviad.krawczyk@huawei.com. diff --git a/Documentation/networking/device_drivers/ethernet/index.rst b/Documentation/networking/device_drivers/ethernet/index.rst index fd3873024da8..cbb75a1818c0 100644 --- a/Documentation/networking/device_drivers/ethernet/index.rst +++ b/Documentation/networking/device_drivers/ethernet/index.rst @@ -13,6 +13,7 @@ Contents: 3com/3c509 3com/vortex amazon/ena + altera/altera_tse aquantia/atlantic chelsio/cxgb cirrus/cs89x0 @@ -24,6 +25,7 @@ Contents: freescale/dpaa2/index freescale/gianfar google/gve + huawei/hinic intel/e100 intel/e1000 intel/e1000e |