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coalesce transfers in same direction

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git-svn-id: svn://kolibrios.org@4346 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
CleverMouse 2013-12-12 16:03:06 +00:00
parent 4565216705
commit df6a761ad4
1 changed files with 32 additions and 17 deletions
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49
kernel/trunk/drivers/usbstor.asm
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@ -458,6 +458,23 @@ if DUMP_PACKETS
DEBUGF 1,'\n'
end if
stdcall USBNormalTransferAsync, [esi+usb_device_data.OutPipe], edx, command_block_wrapper.sizeof, request_callback1, esi, 0
test eax, eax
jz .nothing
; 5. If the next stage is data stage in the same direction, enqueue it here.
cmp [esi+usb_device_data.Command.Flags], 0
js .nothing
cmp [esi+usb_device_data.Command.Length], 0
jz .nothing
mov edx, [esi+usb_device_data.RequestsQueue+request_queue_item.Next]
if DUMP_PACKETS
DEBUGF 1,'K : USBSTOR out:'
mov eax, [edx+request_queue_item.Buffer]
mov ecx, [esi+usb_device_data.Command.Length]
call debug_dump
DEBUGF 1,'\n'
end if
stdcall USBNormalTransferAsync, [esi+usb_device_data.OutPipe], [edx+request_queue_item.Buffer], [esi+usb_device_data.Command.Length], request_callback2, esi, 0
.nothing:
ret
endp
@ -526,28 +543,21 @@ end virtual
; 3. Increment the stage.
mov edx, [ecx+usb_device_data.RequestsQueue+request_queue_item.Next]
inc [edx+request_queue_item.Stage]
; 4. If there is no data, skip this stage.
; 4. Check whether we need to send the data.
; 4a. If there is no data, skip this stage.
cmp [ecx+usb_device_data.Command.Length], 0
jz ..request_get_status
; 5. Initiate USB transfer. If this fails, go to the error handler.
mov eax, [ecx+usb_device_data.InPipe]
; 4b. If data were enqueued in the first stage, do nothing, wait for request_callback2.
cmp [ecx+usb_device_data.Command.Flags], 0
js @f
mov eax, [ecx+usb_device_data.OutPipe]
if DUMP_PACKETS
DEBUGF 1,'K : USBSTOR out:'
push eax ecx
mov eax, [edx+request_queue_item.Buffer]
mov ecx, [ecx+usb_device_data.Command.Length]
call debug_dump
pop ecx eax
DEBUGF 1,'\n'
end if
@@:
stdcall USBNormalTransferAsync, eax, [edx+request_queue_item.Buffer], [ecx+usb_device_data.Command.Length], request_callback2, ecx, 0
jns .nothing
; 5. Initiate USB transfer. If this fails, go to the error handler.
stdcall USBNormalTransferAsync, [ecx+usb_device_data.InPipe], [edx+request_queue_item.Buffer], [ecx+usb_device_data.Command.Length], request_callback2, ecx, 0
test eax, eax
jz .error
; 6. Return.
; 6. The status stage goes to the same direction, enqueue it now.
mov ecx, [.calldata]
jmp ..enqueue_status
.nothing:
ret 20
.error:
; Error.
@ -596,15 +606,20 @@ end if
test eax, eax
jnz .error
; No error.
; If the previous stage was in same direction, do nothing; status request is already enqueued.
cmp [ecx+usb_device_data.Command.Flags], 0
js .nothing
..request_get_status:
; 3. Increment the stage.
mov edx, [ecx+usb_device_data.RequestsQueue+request_queue_item.Next]
inc [edx+request_queue_item.Stage]
; 4. Initiate USB transfer. If this fails, go to the error handler.
..enqueue_status:
lea edx, [ecx+usb_device_data.Status]
stdcall USBNormalTransferAsync, [ecx+usb_device_data.InPipe], edx, command_status_wrapper.sizeof, request_callback3, ecx, 0
test eax, eax
jz .error
.nothing:
ret 20
.error:
; Error.