projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| a093bf00 PWJ |
1 | |
| 2 | HOWTO for multiqueue network device support | |
| 3 | =========================================== | |
| 4 | ||
| 5 | Section 1: Base driver requirements for implementing multiqueue support | |
| a093bf00 PWJ |
6 | |
| 7 | Intro: Kernel support for multiqueue devices | |
| 8 | --------------------------------------------------------- | |
| 9 | ||
| b19fa1fa | 10 | Kernel support for multiqueue devices is always present. |
| a093bf00 PWJ |
11 | |
| 12 | Section 1: Base driver requirements for implementing multiqueue support | |
| 13 | ----------------------------------------------------------------------- | |
| 14 | ||
| 15 | Base drivers are required to use the new alloc_etherdev_mq() or | |
| 16 | alloc_netdev_mq() functions to allocate the subqueues for the device. The | |
| 17 | underlying kernel API will take care of the allocation and deallocation of | |
| 18 | the subqueue memory, as well as netdev configuration of where the queues | |
| 19 | exist in memory. | |
| 20 | ||
| 21 | The base driver will also need to manage the queues as it does the global | |
| 22 | netdev->queue_lock today. Therefore base drivers should use the | |
| 23 | netif_{start|stop|wake}_subqueue() functions to manage each queue while the | |
| 24 | device is still operational. netdev->queue_lock is still used when the device | |
| 25 | comes online or when it's completely shut down (unregister_netdev(), etc.). | |
| 26 | ||
| a093bf00 | 27 | Author: Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com> |