From Wikipedia, the free encyclopedia. The HBA driver itself should not inspect or attempt to interpret these properties in any way. For devices that can manage only one active outstanding command, the driver itself is typically required to manage a per-target queue and starts up a new command upon completion of the current command in a round-robin fashion. Note – If the file does not exist, create it using the format in the example below. The interrupt handler must check the status of the device to be sure the device is generating the interrupt in question. Drivers for different types of devices have different sets of entry points, depending on the operations they perform. This entry point is not required, and if none is supplied, the framework will attempt to probe and attach all possible instances of the appropriate target drivers.
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The following structure is an example of a per-command structure.
Chapter 15 SCSI Host Bus Adapter Drivers
Partial DMA resources have already been allocated. No cleanup reason has been specified. For a typical driver of real devices, the following operating system and hardware concerns must be addressed: These properties are advisory only and serve as an adjunct to the cmdk driver. Per-target scsi-options An HBA driver might support a per-target scsi – options feature in the following format: Start a new command if one is queued up on the hardware as quickly as possible. The per-target scsi-options property can be defined in the driver.
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Capability Management The following sections discuss capability management. Pointer to private data maintained by the HBA driver. Binding a driver to a device refers scai the process by which the system selects a driver to manage a particular device.
It must also check for any errors that have occurred and service any interrupts generated by the device. These issues are summarized in the following list:.
You can specify the baud rate nba 38, when you type the tip command. To display the new LUNs, perform the following command:. The property definitions might or might not be used in future releases. Then executing a boot -rv return the following and no more on the scsi configuration, means the HD is not seen by Solaris: For a typical driver of real devices, the following operating system and hardware concerns must be addressed:.
A particular property is created only if there is no existing property of the same name gpm attached to the HBA instance, permitting a default property value to be overridden in an HBA configuration file.
Freeing the DMA resources causes an implicit DMA synchronization if any cached data remained after the completion of the transfer.
Provides a history of the events the command experienced while in the transport layer. Count of the data bytes not transferred when the command has been completed or the amount of data for which resources have not been allocated. Type 0 to choose the Auto configure option. Note – Refer to the driver. Type type to select a drive type:.
These entry points fall into five functional groups:. The queue property defines how the disk driver sorts the queue of incoming requests during strategy 9E.
This article may require cleanup to meet Wikipedia’s quality standards. Note – These property definitions should appear sci in an HBA driver’s driver. This property can be assigned either from an external agent, such as the PROM, during system boot or from a driver.
An HBA driver will usually need to define a structure to maintain state for each command submitted by a target driver.
Configuring a Solaris Server
Type label and answer y when prompted to continue. Displaying the Device Tree Next: For the Solaris OS to recognize a volume, it must be labeled with the format command. Then the host adapter queues the commands to the target one at a time as opposed to tagged queuing, where the host adapter submits as many commands as it can until the target indicates that the queue is full. These entry points fall into five functional groups: Report Attachment Status Finally, the driver should report that this instance of the device is attached and return success.