| Ramkrishna Vepa | 5adfb64 | 2009-04-01 18:14:23 +0000 | [diff] [blame] | 1 | Neterion's (Formerly S2io) X3100 Series 10GbE PCIe Server Adapter Linux driver |
| 2 | ============================================================================== |
| 3 | |
| 4 | Contents |
| 5 | -------- |
| 6 | |
| 7 | 1) Introduction |
| 8 | 2) Features supported |
| 9 | 3) Configurable driver parameters |
| 10 | 4) Troubleshooting |
| 11 | |
| 12 | 1) Introduction: |
| 13 | ---------------- |
| 14 | This Linux driver supports all Neterion's X3100 series 10 GbE PCIe I/O |
| 15 | Virtualized Server adapters. |
| 16 | The X3100 series supports four modes of operation, configurable via |
| 17 | firmware - |
| 18 | Single function mode |
| 19 | Multi function mode |
| 20 | SRIOV mode |
| 21 | MRIOV mode |
| 22 | The functions share a 10GbE link and the pci-e bus, but hardly anything else |
| 23 | inside the ASIC. Features like independent hw reset, statistics, bandwidth/ |
| 24 | priority allocation and guarantees, GRO, TSO, interrupt moderation etc are |
| 25 | supported independently on each function. |
| 26 | |
| 27 | (See below for a complete list of features supported for both IPv4 and IPv6) |
| 28 | |
| 29 | 2) Features supported: |
| 30 | ---------------------- |
| 31 | |
| 32 | i) Single function mode (up to 17 queues) |
| 33 | |
| 34 | ii) Multi function mode (up to 17 functions) |
| 35 | |
| 36 | iii) PCI-SIG's I/O Virtualization |
| 37 | - Single Root mode: v1.0 (up to 17 functions) |
| 38 | - Multi-Root mode: v1.0 (up to 17 functions) |
| 39 | |
| 40 | iv) Jumbo frames |
| 41 | X3100 Series supports MTU up to 9600 bytes, modifiable using |
| 42 | ifconfig command. |
| 43 | |
| 44 | v) Offloads supported: (Enabled by default) |
| 45 | Checksum offload (TCP/UDP/IP) on transmit and receive paths |
| 46 | TCP Segmentation Offload (TSO) on transmit path |
| 47 | Generic Receive Offload (GRO) on receive path |
| 48 | |
| 49 | vi) MSI-X: (Enabled by default) |
| 50 | Resulting in noticeable performance improvement (up to 7% on certain |
| 51 | platforms). |
| 52 | |
| 53 | vii) NAPI: (Enabled by default) |
| 54 | For better Rx interrupt moderation. |
| 55 | |
| 56 | viii)RTH (Receive Traffic Hash): (Enabled by default) |
| 57 | Receive side steering for better scaling. |
| 58 | |
| 59 | ix) Statistics |
| 60 | Comprehensive MAC-level and software statistics displayed using |
| 61 | "ethtool -S" option. |
| 62 | |
| 63 | x) Multiple hardware queues: (Enabled by default) |
| 64 | Up to 17 hardware based transmit and receive data channels, with |
| 65 | multiple steering options (transmit multiqueue enabled by default). |
| 66 | |
| 67 | 3) Configurable driver parameters: |
| 68 | ---------------------------------- |
| 69 | |
| 70 | i) max_config_dev |
| 71 | Specifies maximum device functions to be enabled. |
| 72 | Valid range: 1-8 |
| 73 | |
| 74 | ii) max_config_port |
| 75 | Specifies number of ports to be enabled. |
| 76 | Valid range: 1,2 |
| 77 | Default: 1 |
| 78 | |
| 79 | iii)max_config_vpath |
| 80 | Specifies maximum VPATH(s) configured for each device function. |
| 81 | Valid range: 1-17 |
| 82 | |
| 83 | iv) vlan_tag_strip |
| 84 | Enables/disables vlan tag stripping from all received tagged frames that |
| 85 | are not replicated at the internal L2 switch. |
| 86 | Valid range: 0,1 (disabled, enabled respectively) |
| 87 | Default: 1 |
| 88 | |
| 89 | v) addr_learn_en |
| 90 | Enable learning the mac address of the guest OS interface in |
| 91 | virtualization environment. |
| 92 | Valid range: 0,1 (disabled, enabled respectively) |
| 93 | Default: 0 |