Difference between revisions of "Unit Storage"

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----
 
----
  
−
'''Ultibo Storage interface unit'''
+
'''Ultibo Storage Interface unit'''
  
−
This unit provides both the Storage device interface and the generic USB mass storage driver.
+
This unit provides the generic Storage device interface used by all storage drivers.
−
 
+
−
'''USB Mass Storage Devices'''
+
−
 
+
−
The USB Mass Storage Class Control/Bulk/Interrupt (CBI) Transport specification is approved for use only with full-speed floppy disk drives. CBI shall not be used in high-speed capable devices, or in devices other than floppy disk drives. CBI shall not be used in devices that implement LSDFS. Usage of CBI for any new design is discouraged.
+
−
 
+
−
Therefore the majority of USB Mass Storage devices use the Bulk only interface.
+
−
 
+
−
USB mass storage class devices normally use the SCSI command set and therefore the USB storage driver consumes the SCSI unit for the protocol and command definitions. USB mass storage devices are registered directly as Storage devices not as SCSI devices.
+
  
 
=== Constants ===
 
=== Constants ===
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</div></div>
 
</div></div>
 
<br />
 
<br />
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 
−
<div style="font-size: 14px; padding-left: 12px;">'''USB storage''' <code> USB_STORAGE_* </code></div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
| <code>USBSTORAGE_STORAGE_DESCRIPTION = 'USB Storage Device';</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
| <code>USBSTORAGE_DRIVER_NAME = 'USB Mass Storage Driver';</code>
 
−
| Name of USB storage driver
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
|colspan="2"|''CB/CBI (Control/Bulk/Interrupt) Requests''
 
−
|-
 
−
| <code>USB_STORAGE_REQUEST_CBI_ADSC = 0;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
|colspan="2"|''BBB (Bulk Only) Requests''
 
−
|-
 
−
| <code>USB_STORAGE_REQUEST_BBB_RESET = $FF;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_REQUEST_BBB_GET_MAX_LUN = $FE;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
|colspan="2"|''Command Block Wrapper''
 
−
|-
 
−
| <code>USB_STORAGE_CBW_SIGNATUR = $43425355;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CBW_FLAGS_OUT = $00;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CBW_FLAGS_IN = $80;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CBW_CB_LENGTH = 16;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CBW_SIZE = 31;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
|colspan="2"|''Command Status Wrapper''
 
−
|-
 
−
| <code>USB_STORAGE_CSW_SIGNATURE = $53425355;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CSW_STATUS_GOOD = $00;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CSW_STATUS_FAILED = $01;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CSW_STATUS_PHASE = $02;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_CSW_SIZE = 13;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
|colspan="2"|''Command Data''
 
−
|-
 
−
| <code>USB_STORAGE_COMMAND_MAX_SIZE = 16;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
|colspan="2"|''Command Retry Counts''
 
−
|-
 
−
| <code>USB_STORAGE_READ_RETRIES = 2;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_WRITE_RETRIES = 2;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_STATUS_RETRIES = 2;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_INQUIRY_RETRIES = 5;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_READ_CAPACITY_RETRIES = 3;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>USB_STORAGE_TEST_UNIT_READY_RETRIES = 5;</code>
 
−
| 10; TestingRPi
 
−
|-
 
−
|colspan="2"|&nbsp;
 
−
|-
 
−
|colspan="2"|''Peripheral Device Types''
 
−
|-
 
−
|colspan="2"|''These are a subset of the SCSI Peripheral Device Types''
 
−
|-
 
−
| <code>USB_STORAGE_DEVICE_TYPE_DISK = $00;</code>
 
−
| SBC Direct-access device (e.g., UHD Floppy disk)
 
−
|-
 
−
| <code>USB_STORAGE_DEVICE_TYPE_CDROM = $05;</code>
 
−
| MMC-5 CD-ROM device
 
−
|-
 
−
| <code>USB_STORAGE_DEVICE_TYPE_OPTICAL = $07;</code>
 
−
| Optical memory device (e.g., Non-CD optical disks)
 
−
|-
 
−
| <code>USB_STORAGE_DEVICE_TYPE_RBC = $0E;</code>
 
−
| RBC Direct-access device (e.g., UHD Floppy disk)
 
−
|-
 
−
| <code>USB_STORAGE_DEVICE_TYPE_UNKNOWN = $1F;</code>
 
−
| Unknown or no device type
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
  
 
=== Type definitions ===
 
=== Type definitions ===
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{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 
{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 
|-
 
|-
−
| <code>TStorageDeviceControl = function(Storage:PStorageDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;</code>
+
| <code>TStorageDeviceControl = function(Storage:PStorageDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;</code>
 
| style="width: 40%;"|
 
| style="width: 40%;"|
 
|-
 
|-
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|}
 
|}
 
</div></div>   
 
</div></div>   
−
 
−
'''USB command block'''
 
−
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 
−
<code>PUSBCommandBlock = ^TUSBCommandBlock;</code>
 
−
 
−
<code>TUSBCommandBlock = record</code>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
|colspan="2"|Note: SBC Command Block (Derived from TSCSICommandBlock)
 
−
|-
 
−
|colspan="2"|''SCSI Properties''
 
−
|-
 
−
| <code>Command:array[0..USB_STORAGE_COMMAND_MAX_SIZE - 1] of Byte;</code>
 
−
| Command
 
−
|-
 
−
| <code>SenseData:array[0..63] of Byte;</code>
 
−
| Request Sense
 
−
|-
 
−
| <code>Status:Byte;</code>
 
−
| SCSI Status
 
−
|-
 
−
| <code>TargetID:Byte;</code>
 
−
| Target Id
 
−
|-
 
−
| <code>TargetLUN:Byte;</code>
 
−
| Target LUN
 
−
|-
 
−
| <code>CommandLength:Byte;</code>
 
−
| Command Length
 
−
|-
 
−
| <code>DataLength:LongWord;</code>
 
−
| Data Length
 
−
|-
 
−
| <code>Data:Pointer;</code>
 
−
| Pointer to Data
 
−
|-
 
−
| <code>MessageOut:array[0..11] of Byte;</code>
 
−
| Message out buffer
 
−
|-
 
−
| <code>MessageIn:array[0..11] of Byte;</code>
 
−
| Message in buffer
 
−
|-
 
−
| <code>SenseCommandLength:Byte;</code>
 
−
| Sense Command Length
 
−
|-
 
−
| <code>SenseDataLength:LongWord;</code>
 
−
| Sense Data Length
 
−
|-
 
−
| <code>SenseCommand:array[0..5] of Byte;</code>
 
−
| Sense Command
 
−
|-
 
−
| <code>ControllerStatus:LongWord;</code>
 
−
| Controller Status
 
−
|-
 
−
| <code>TransferredBytes:LongWord;</code>
 
−
| Transferred Bytes
 
−
|-
 
−
|colspan="2"|''USB Properties''
 
−
|-
 
−
| <code>Direction:Byte;</code>
 
−
| USB Direction (eg USB_DIRECTION_OUT or USB_DIRECTION_IN)
 
−
|-
 
−
|}
 
−
</div></div> 
 
−
 
−
'''USB storage device'''
 
−
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 
−
<code>PUSBStorageDevice = ^TUSBStorageDevice;</code>
 
−
 
−
<code>TUSBStorageDevice = record</code>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
|colspan="2"|''Storage Properties''
 
−
|-
 
−
| <code>Storage:TStorageDevice;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|''USB Properties''
 
−
|-
 
−
| <code>Subclass:Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>Protocol:Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>MaxLUN:Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>Sequence:LongWord;</code>
 
−
| For dCBWTag property
 
−
|-
 
−
| <code>Primary:PUSBStorageDevice;</code>
 
−
| Primary storage device (for multi LUN devices)
 
−
|-
 
−
| <code>StorageInterface:PUSBInterface;</code>
 
−
| USB Mass Storage device Interface
 
−
|-
 
−
| <code>ReadWait:TSemaphoreHandle;</code>
 
−
| Read completed semaphore
 
−
|-
 
−
| <code>WriteWait:TSemaphoreHandle;</code>
 
−
| Write completed semaphore
 
−
|-
 
−
| <code>InterruptWait:TSemaphoreHandle;</code>
 
−
| Interrupt completed semaphore
 
−
|-
 
−
| <code>ReadRequest:PUSBRequest;</code>
 
−
| Bulk IN Request
 
−
|-
 
−
| <code>WriteRequest:PUSBRequest;</code>
 
−
| Bulk OUT Request
 
−
|-
 
−
| <code>InterruptRequest:PUSBRequest;</code>
 
−
| Interrupt IN Request
 
−
|-
 
−
| <code>ReadEndpoint:PUSBEndpointDescriptor;</code>
 
−
| Bulk IN Endpoint
 
−
|-
 
−
| <code>WriteEndpoint:PUSBEndpointDescriptor;</code>
 
−
| Bulk OUT Endpoint
 
−
|-
 
−
| <code>InterruptEndpoint:PUSBEndpointDescriptor;</code>
 
−
| Interrupt IN Endpoint
 
−
|-
 
−
| <code>PendingCount:LongWord;</code>
 
−
| Number of USB requests pending for this storage
 
−
|-
 
−
| <code>WaiterThread:TThreadId;</code>
 
−
| Thread waiting for pending requests to complete (for storage eject)
 
−
|-
 
−
|colspan="2"|''SCSI Properties''
 
−
|-
 
−
| <code>CommandBlock:TUSBCommandBlock;</code>
 
−
| &nbsp;
 
−
|-
 
−
|colspan="2"|''ATAPI Properties''
 
−
|-
 
−
| &nbsp;
 
−
| style="width: 50%;"|&nbsp;
 
−
|-
 
−
|colspan="2"|''RBC Properties''
 
−
|-
 
−
| &nbsp;
 
−
| style="width: 50%;"|&nbsp;
 
−
|-
 
−
|}
 
−
</div></div>
 
−
 
−
'''USB command block wrapper'''
 
−
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 
−
<code>PUSBCommandBlockWrapper = ^TUSBCommandBlockWrapper;</code>
 
−
 
−
<code>TUSBCommandBlockWrapper = record</code>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
| <code>dCBWSignature:LongWord;</code>
 
−
| style="width: 50%;"|&nbsp;
 
−
|-
 
−
| <code>dCBWTag:LongWord;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>dCBWDataTransferLength:LongWord;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>bCBWFlags:Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>bCBWLUN:Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>bCBWCBLength:Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>CBWCB:array[0..USB_STORAGE_CBW_CB_LENGTH - 1] of Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
|}
 
−
</div></div>
 
−
 
−
'''USB command status wrapper'''
 
−
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 
−
<code>PUSBCommandStatusWrapper = ^TUSBCommandStatusWrapper;</code>
 
−
 
−
<code>TUSBCommandStatusWrapper = record</code>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
| <code>dCSWSignature:LongWord;</code>
 
−
| style="width: 50%;"|&nbsp;
 
−
|-
 
−
| <code>dCSWTag:LongWord;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>dCSWDataResidue:LongWord;</code>
 
−
| &nbsp;
 
−
|-
 
−
| <code>bCSWStatus:Byte;</code>
 
−
| &nbsp;
 
−
|-
 
−
|}
 
−
</div></div>
 
 
<br />
 
<br />
  
Line 787: Line 440:
 
<br />
 
<br />
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
−
<pre style="border: 0; padding-bottom:0px;">function StorageDeviceControl(Storage:PStorageDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;</pre>
+
<pre style="border: 0; padding-bottom:0px;">function StorageDeviceControl(Storage:PStorageDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
Line 983: Line 636:
 
! Note
 
! Note
 
| None documented
 
| None documented
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
 
−
'''USB storage functions'''
 
−
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceRead(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| According to 3.4 of USB Mass Storage Bulk Only 1.0, requests must be queued one at a time to a device.
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceWrite(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| According to 3.4 of USB Mass Storage Bulk Only 1.0, requests must be queued one at a time to a device.
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceControl(Storage:PStorageDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| According to 3.4 of USB Mass Storage Bulk Only 1.0, requests must be queued one at a time to a device.
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDriverBind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Bind the Storage driver to a USB device if it is suitable</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Device
 
−
| The USB device to attempt to bind to
 
−
|-
 
−
! Interrface
 
−
| The USB interface to attempt to bind to (or nil for whole device)
 
−
|-
 
−
! Return
 
−
| USB_STATUS_SUCCESS if completed, USB_STATUS_DEVICE_UNSUPPORTED if unsupported or another error code on failure.
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDriverUnbind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Unbind the Storage driver from a USB device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Device
 
−
| The USB device to unbind from
 
−
|-
 
−
! Interrface
 
−
| The USB interface to unbind from (or nil for whole device)
 
−
|-
 
−
! Return
 
−
| USB_STATUS_SUCCESS if completed or another error code on failure
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">procedure USBStorageReadComplete(Request:PUSBRequest);</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called when a USB request from a USB storage bulk IN endpoint completes</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Request
 
−
| The USB request which has completed
 
−
|-
 
−
! Note
 
−
| The thread that submitted the read request will hold the storage lock
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">procedure USBStorageWriteComplete(Request:PUSBRequest);</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called when a USB request from a USB storage bulk OUT endpoint completes</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Request
 
−
| The USB request which has completed
 
−
|-
 
−
! Note
 
−
| The thread that submitted the write request will hold the storage lock
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">procedure USBStorageInterruptComplete(Request:PUSBRequest);</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called when a USB request from a USB storage IN interrupt endpoint completes</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Request
 
−
| The USB request which has completed
 
−
|-
 
−
! Note
 
−
| The thread that submitted the interrupt request will hold the storage lock
 
 
|-
 
|-
 
|}
 
|}
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−
<pre style="border: 0; padding-bottom:0px;">function StorageGetCount:LongWord; inline;</pre>
+
<pre style="border: 0; padding-bottom:0px;">function StorageGetCount:LongWord;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current storage count</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current storage count</div>
 
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! Note
 
! Note
 
| None documented
 
| None documented
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
 
−
'''USB storage helper functions'''
 
−
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageCheckSubclass(Subclass:Byte):Boolean;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
−
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−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageCheckProtocol(Protocol:Byte):Boolean;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageBlockSizeToBlockShift(BlockSize:LongWord):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
−
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−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStoragePatchDevice(Device:PUSBDevice; var Subclass,Protocol:Byte):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' A function to adjust the subclass and protocol parameters of known defective devices</div>
 
−
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−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageFixupDevice(Device:PUSBDevice; var Vendor,Product:String):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' A function to adjust the vendor and product parameters of known defective devices</div>
 
−
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−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceLock(Device:PUSBDevice; Storage:PUSBStorageDevice):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a Prevent Media Removal request to a storage device</div>
 
−
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−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceUnlock(Device:PUSBDevice; Storage:PUSBStorageDevice):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a Allow Media Removal request to a storage device</div>
 
−
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−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceLoad(Device:PUSBDevice; Storage:PUSBStorageDevice):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a Start Stop request to a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceEject(Device:PUSBDevice; Storage:PUSBStorageDevice):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a Start Stop request to a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceReset(Device:PUSBDevice; Storage:PUSBStorageDevice):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a Storage Reset request to a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Reset recovery (5.3.4 in USB Mass Storage Bulk Only 1.0)
 
−
For Reset Recovery the host shall issue in the following order: a) a Bulk-Only Mass Storage Reset b) a Clear Feature HALT to the Bulk-In endpoint c) a Clear Feature HALT to the Bulk-Out endpoint This is done in 3 steps. If the reset doesn't succeed, the device should be port reset.
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceGetInfo(Device:PUSBDevice; Storage:PUSBStorageDevice):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Obtain basic information about a storage device (Type, Size, State, Product etc)</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceGetStatus(Device:PUSBDevice; Storage:PUSBStorageDevice):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI/UFI/SFF8070
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceGetMaxLUN(Device:PUSBDevice; Storage:PUSBStorageDevice; var MaxLUN:Byte):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a Get Max LUN request to a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceClearStall(Device:PUSBDevice; Storage:PUSBStorageDevice; Endpoint:PUSBEndpointDescriptor):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a USB Clear Feature (HALT) to the supplied endpoint on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| None documented
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceInquiry(Device:PUSBDevice; Storage:PUSBStorageDevice; var DeviceType,DeviceFlags:LongWord;v ar Vendor,Product,Revision:PChar):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Inquiry command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI/UFI/SFF8070
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceRequestSense(Device:PUSBDevice; Storage:PUSBStorageDevice; var SenseKey,ASC,ASCQ:Byte):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Request Sense command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI/UFI/SFF8070
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceReadCapacity(Device:PUSBDevice; Storage:PUSBStorageDevice; var BlockSize,BlockShift:LongWord; var BlockCount:Int64):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Read Capacity command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI/UFI/SFF8070
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceTestUnitReady(Device:PUSBDevice; Storage:PUSBStorageDevice; var DeviceFlags:LongWord):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Test Unit Ready command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI/UFI/SFF8070
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceRead10(Device:PUSBDevice; Storage:PUSBStorageDevice; Start:LongWord;Count:Word; Buffer:Pointer):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Read10 command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI/UFI/SFF8070. Caller must hold the storage lock.
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceWrite10(Device:PUSBDevice; Storage:PUSBStorageDevice; Start:LongWord; Count:Word; Buffer:Pointer):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Write10 command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI/UFI/SFF8070
 
−
Caller must hold the storage lock
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceRead16(Device:PUSBDevice; Storage:PUSBStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Read16 command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI only (Only on devices > 2TB)
 
−
Caller must hold the storage lock
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceWrite16(Device:PUSBDevice; Storage:PUSBStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Issue a SCSI Write16 command to a LUN on a storage device</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Supported by Subclass SCSI only (Only on devices > 2TB)
 
−
Caller must hold the storage lock
 
−
|-
 
−
|}
 
−
</div></div>
 
−
<br />
 
−
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
−
<pre style="border: 0; padding-bottom:0px;">function USBStorageDeviceTransport(Device:PUSBDevice; Storage:PUSBStorageDevice; Command:PUSBCommandBlock):LongWord;</pre>
 
−
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Perform the appropriate transport sequence for the device based on subclass and protocol</div>
 
−
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
−
{| class="wikitable" style="font-size: 14px; background: white;"
 
−
|-
 
−
! Note
 
−
| Handles Command/Data/Status phases plus endpoint stall, reset and retry as per the specification. Supported by Subclass SCSI/UFI/SFF8070.
 
−
Caller must hold the storage lock.
 
 
|-
 
|-
 
|}
 
|}

Latest revision as of 03:24, 29 March 2024

Return to Unit Reference


Description

Ultibo Storage Interface unit

This unit provides the generic Storage device interface used by all storage drivers.

Constants


Storage specific constants STORAGE_*
STORAGE_NAME_PREFIX = 'Storage'; Name prefix for Storage Devices
 
STORAGE_STATUS_TIMER_INTERVAL = 1000;  


Storage device type STORAGE_TYPE_*
STORAGE_TYPE_NONE = 0;  
STORAGE_TYPE_HDD = 1;  
STORAGE_TYPE_FDD = 2;  
STORAGE_TYPE_CDROM = 3;  
STORAGE_TYPE_OPTICAL = 4;  
STORAGE_TYPE_TAPE = 5;  
STORAGE_TYPE_REMOVABLE = 6;  
 
STORAGE_TYPE_MAX = 6;  


Storage device state STORAGE_STATE_*
STORAGE_STATE_EJECTED = 0;  
STORAGE_STATE_EJECTING = 1;  
STORAGE_STATE_INSERTING = 2;  
STORAGE_STATE_INSERTED = 3;  
 
STORAGE_STATE_MAX = 3;  


Storage device flag STORAGE_FLAG_*
STORAGE_FLAG_NONE = $00000000;  
STORAGE_FLAG_REMOVABLE = $00000001;  
STORAGE_FLAG_LBA48 = $00000002;  
STORAGE_FLAG_NOT_READY = $00000004;  
STORAGE_FLAG_NO_MEDIA = $00000008;  
STORAGE_FLAG_READ_ONLY = $00000010;  
STORAGE_FLAG_WRITE_ONLY = $00000020;  
STORAGE_FLAG_ERASEABLE = $00000040;  
STORAGE_FLAG_LOCKABLE = $00000080;  
STORAGE_FLAG_LOCKED = $00000100;  
STORAGE_FLAG_EJECTABLE = $00000200;  
STORAGE_FLAG_CHANGABLE = $00000400;  


Storage device control code STORAGE_CONTROL_*
STORAGE_CONTROL_TEST_READY = 1; Test Unit Ready
STORAGE_CONTROL_RESET = 2; Reset Device
STORAGE_CONTROL_TEST_MEDIA = 3; Test No Media
STORAGE_CONTROL_LOCK = 4; Lock Media
STORAGE_CONTROL_UNLOCK = 5; Unlock Media
STORAGE_CONTROL_EJECT = 6; Eject Media
STORAGE_CONTROL_TEST_LOCKED = 7; Test Media Locked
STORAGE_CONTROL_TEST_CHANGED = 8; Test Media Changed
STORAGE_CONTROL_GET_VENDORID = 9; Get Vendor Id
STORAGE_CONTROL_GET_PRODUCTID = 10; Get Product Id
STORAGE_CONTROL_GET_SERIAL = 11; Get Serial No
STORAGE_CONTROL_GET_REVISION = 12; Get Revision No
STORAGE_CONTROL_GET_PRODUCT = 13; Get Product Name
STORAGE_CONTROL_GET_MANUFACTURER = 14; Get Manufacturer Name


Storage logging STORAGE_LOG_*
STORAGE_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG; Storage debugging messages
STORAGE_LOG_LEVEL_INFO = LOG_LEVEL_INFO; Storage informational messages, such as a device being attached or detached
STORAGE_LOG_LEVEL_WARN = LOG_LEVEL_WARN; Storage warning messages
STORAGE_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR; Storage error messages
STORAGE_LOG_LEVEL_NONE = LOG_LEVEL_NONE; No Storage messages


Type definitions


Storage enumeration callback

TStorageEnumerate = function(Storage:PStorageDevice; Data:Pointer):LongWord;

Storage notification callback

TStorageNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;

Storage device read

TStorageDeviceRead = function(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;

Storage device write

TStorageDeviceWrite = function(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;

Storage device erase

TStorageDeviceErase = function(Storage:PStorageDevice; const Start,Count:Int64):LongWord;

Storage device control

TStorageDeviceControl = function(Storage:PStorageDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;

Storage device

PStorageDevice = ^TStorageDevice;

TStorageDevice = record

Device Properties
Device:TDevice; The Device entry for this Storage
Storage Properties
StorageId:LongWord; Unique Id of this Storage in the Storage table
StorageState:LongWord; Storage state (eg STORAGE_STATE_INSERTED)
DeviceRead:TStorageDeviceRead; A Device specific DeviceRead method implementing a standard Storage device interface
DeviceWrite:TStorageDeviceWrite; A Device specific DeviceWrite method implementing a standard Storage device interface
DeviceErase:TStorageDeviceErase; A Device specific DeviceErase method implementing a standard Storage device interface
DeviceControl:TStorageDeviceControl; A Device specific DeviceControl method implementing a standard Storage device interface
Driver Properties
Lock:TMutexHandle; Storage lock
TargetID:LongWord; SCSI Id
TargetLUN:LongWord; LUN
BlockSize:LongWord; Block Size
BlockCount:Int64; Number of Blocks
BlockShift:LongWord; Shift Count for Blocks to Bytes conversion (eg 9 for 512 byte blocks)
Vendor:PChar; ATA Model, SCSI Vendor
Product:PChar; ATA Serial No, SCSI Product
Revision:PChar; Firmware Revision
StatusTimer:TTimerHandle; Timer for status change detection
Statistics Properties
ReadCount:LongWord;  
ReadErrors:LongWord;  
WriteCount:LongWord;  
WriteErrors:LongWord;  
EraseCount:LongWord;  
EraseErrors:LongWord;  
Internal Properties
Prev:PStorageDevice; Previous entry in Storage table
Next:PStorageDevice; Next entry in Storage table


Public variables


Storage logging

STORAGE_DEFAULT_LOG_LEVEL:LongWord = STORAGE_LOG_LEVEL_DEBUG; Minimum level for Storage messages. Only messages with level greater than or equal to this will be printed.
STORAGE_LOG_ENABLED:Boolean;


Function declarations


Initialization functions 

procedure StorageInit;
Description: To be documented
Note None documented


Storage functions 

function StorageDeviceRead(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function StorageDeviceWrite(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function StorageDeviceErase(Storage:PStorageDevice; const Start,Count:Int64):LongWord;
Description: To be documented
Note None documented 


function StorageDeviceControl(Storage:PStorageDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;
Description: To be documented
Note None documented 


function StorageDeviceSetState(Storage:PStorageDevice; State:LongWord):LongWord;
Description: Set the state of the specified storage and send a notification
Storage The storage to set the state for
State The new state to set and notify
Return ERROR_SUCCESS if completed or another error code on failure 


function StorageDeviceStartStatus(Storage:PStorageDevice; Interval:LongWord):LongWord;
Description: Start status monitoring on the specified storage for insert/eject notifications
Storage The storage to start status monitoring for
Interval The status monitoring interval in milliseconds
Return ERROR_SUCCESS if completed or another error code on failure 


function StorageDeviceStopStatus(Storage:PStorageDevice):LongWord;
Description: Stop status monitoring on the specified storage for insert/eject notifications
Storage The storage to stop status monitoring for
Return ERROR_SUCCESS if completed or another error code on failure 


function StorageDeviceCreate:PStorageDevice;
Description: Create a new Storage entry
Return Pointer to new Storage entry or nil if storage could not be created 


function StorageDeviceCreateEx(Size:LongWord):PStorageDevice;
Description: Create a new Storage entry
Size Size in bytes to allocate for new storage (Including the storage entry)
Return Pointer to new Storage entry or nil if storage could not be created 


function StorageDeviceDestroy(Storage:PStorageDevice):LongWord;
Description: Destroy an existing Storage entry
Note None documented 


function StorageDeviceRegister(Storage:PStorageDevice):LongWord;
Description: Register a new Storage in the Storage table
Note None documented 


function StorageDeviceDeregister(Storage:PStorageDevice):LongWord;
Description: Deregister a Storage from the Storage table
Note None documented 


function StorageDeviceFind(StorageId:LongWord):PStorageDevice;
Description: To be documented
Note None documented 


function StorageDeviceFindByDevice(Device:PDevice):PStorageDevice;
Description: Find a Storage device by the matching DeviceData property
Device The device entry to match with the DeviceData value
Return The Storage device matched or nil if none found 


function StorageDeviceFindByName(const Name:String):PStorageDevice; inline;
Description: To be documented
Note None documented 


function StorageDeviceFindByDescription(const Description:String):PStorageDevice; inline;
Description: To be documented
Note None documented 


function StorageDeviceEnumerate(Callback:TStorageEnumerate; Data:Pointer):LongWord;
Description: To be documented
Note None documented 


function StorageDeviceNotification(Storage:PStorageDevice; Callback:TStorageNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented
Note None documented


Storage helper functions 

function StorageGetCount:LongWord;
Description: Get the current storage count
Note None documented 


function StorageDeviceCheck(Storage:PStorageDevice):PStorageDevice;
Description: Check if the supplied Storage is in the storage table
Note None documented 


function StorageDeviceTypeToString(StorageType:LongWord):String;
Description: To be documented
Note None documented 


function StorageDeviceStateToString(StorageState:LongWord):String;
Description: To be documented
Note None documented 


function StorageDeviceStateToNotification(State:LongWord):LongWord;
Description: Convert a Storage state value into the notification code for device notifications
Note None documented 


procedure StorageLog(Level:LongWord; Storage:PStorageDevice; const AText:String);
Description: To be documented
Note None documented 


procedure StorageLogInfo(Storage:PStorageDevice; const AText:String); inline;
Description: To be documented
Note None documented 


procedure StorageLogWarn(Storage:PStorageDevice; const AText:String); inline;
Description: To be documented
Note None documented 


procedure StorageLogError(Storage:PStorageDevice; const AText:String); inline;
Description: To be documented
Note None documented 


procedure StorageLogDebug(Storage:PStorageDevice; const AText:String); inline;
Description: To be documented
Note None documented 


procedure StorageStatusTimer(Storage:PStorageDevice);
Description: To be documented
Note None documented


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