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i8255x: cleanup + support for multiple TX descriptors.

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git-svn-id: svn://kolibrios.org@5525 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2015-03-18 10:57:16 +00:00
parent 8502d3d6db
commit 6a6d3deaec
1 changed files with 157 additions and 91 deletions
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248
drivers/ethernet/i8255x.asm
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@ -28,6 +28,8 @@ entry START
MAX_DEVICES = 16
TX_RING_SIZE = 16
DEBUG = 1
__DEBUG__ = 1
__DEBUG_LEVEL__ = 2 ; 1 = verbose, 2 = errors only
@ -122,18 +124,20 @@ struct rxfd
ends
struc txfd {
struct txfd
.status dw ?
.command dw ?
.link dd ?
.desc_addr dd ?
.count dd ?
status dw ?
command dw ?
link dd ?
desc_addr dd ?
count dd ?
.buf_addr0 dd ?
.buf_size0 dd ?
buf_addr dd ?
buf_size dd ?
virt_addr dd ?
dd ? ; alignment
}
ends
struc confcmd {
@ -172,12 +176,13 @@ struct device ETH_DEVICE
pci_bus dd ?
pci_dev dd ?
rx_desc dd ?
last_tx_buffer dd ?
cur_tx dd ?
last_tx dd ?
ee_bus_width db ?
irq_line db ?
rb 0x100 - ($ and 0xff) ; align 256
txfd txfd
tx_ring rb TX_RING_SIZE*sizeof.txfd
rb 0x100 - ($ and 0xff) ; align 256
confcmd confcmd
@ -466,31 +471,37 @@ reset:
set_io [ebx + device.io_addr], reg_scb_ptr
out dx, eax
mov ax, INT_MASK + CU_STATSADDR
set_io [ebx + device.io_addr], reg_scb_cmd
mov ax, CU_STATSADDR or INT_MASK
out dx, ax
call cmd_wait
;-----------------
; setup RX
;------------------------
; setup RX base addr to 0
set_io [ebx + device.io_addr], reg_scb_ptr
xor eax, eax
out dx, eax
set_io [ebx + device.io_addr], reg_scb_cmd
mov ax, INT_MASK + RX_ADDR_LOAD
mov ax, RX_ADDR_LOAD or INT_MASK
out dx, ax
call cmd_wait
;-----------------------------
; Create RX and TX descriptors
call create_ring
call init_rx_ring
test eax, eax
jz .error
; RX start
call init_tx_ring
;---------
; Start RX
DEBUGF 1, "Starting RX"
set_io [ebx + device.io_addr], 0
set_io [ebx + device.io_addr], reg_scb_ptr
@ -499,11 +510,12 @@ reset:
add eax, NET_BUFF.data
out dx, eax
mov ax, INT_MASK + RX_START
set_io [ebx + device.io_addr], reg_scb_cmd
mov ax, RX_START or INT_MASK
out dx, ax
call cmd_wait
;----------
; Set-up TX
set_io [ebx + device.io_addr], reg_scb_ptr
@ -511,15 +523,39 @@ reset:
out dx, eax
set_io [ebx + device.io_addr], reg_scb_cmd
mov ax, INT_MASK + CU_CMD_BASE
mov ax, CU_CMD_BASE or INT_MASK
out dx, ax
call cmd_wait
; --------------------
;-------------------------
; Individual address setup
mov [ebx + device.confcmd.command], CmdIASetup + Cmdsuspend
mov [ebx + device.confcmd.status], 0
lea eax, [ebx + device.tx_ring]
invoke GetPhysAddr
mov [ebx + device.confcmd.link], eax
lea edi, [ebx + device.confcmd.data]
lea esi, [ebx + device.mac]
movsd
movsw
set_io [ebx + device.io_addr], reg_scb_ptr
lea eax, [ebx + device.confcmd.status]
invoke GetPhysAddr
out dx, eax
set_io [ebx + device.io_addr], reg_scb_cmd
mov ax, CU_START or INT_MASK
out dx, ax
call cmd_wait
;-------------
; Configure CU
mov [ebx + device.confcmd.command], CmdConfigure + Cmdsuspend
mov [ebx + device.confcmd.status], 0
lea eax, [ebx + device.txfd.status]
lea eax, [ebx + device.confcmd.status]
invoke GetPhysAddr
mov [ebx + device.confcmd.link], eax
@ -535,46 +571,17 @@ reset:
mov byte[ebx + device.confcmd.data + 19], 0x80
mov byte[ebx + device.confcmd.data + 21], 0x05
mov [ebx + device.txfd.command], CmdIASetup
mov [ebx + device.txfd.status], 0
lea eax, [ebx + device.confcmd.status]
invoke GetPhysAddr
mov [ebx + device.txfd.link], eax
;;; copy in our MAC
lea edi, [ebx + device.txfd.desc_addr]
lea esi, [ebx + device.mac]
movsd
movsw
set_io [ebx + device.io_addr], reg_scb_ptr
lea eax, [ebx + device.txfd.status]
lea eax, [ebx + device.confcmd.status]
invoke GetPhysAddr
out dx, eax
; Start CU & enable ints
set_io [ebx + device.io_addr], reg_scb_cmd
mov ax, CU_START
mov ax, CU_START ; expect Interrupts from now on
out dx, ax
call cmd_wait
;-----------------------
; build txfd structure (again!)
lea eax, [ebx + device.txfd.status]
invoke GetPhysAddr
mov [ebx + device.txfd.link], eax
mov [ebx + device.txfd.count], 0x02208000
lea eax, [ebx + device.txfd.buf_addr0]
invoke GetPhysAddr
mov [ebx + device.txfd.desc_addr], eax
; Indicate that we have successfully reset the card
DEBUGF 1,"Reset complete\n"
mov [ebx + device.mtu], 1514
; Set link state to unknown
@ -589,7 +596,7 @@ reset:
align 4
create_ring:
init_rx_ring:
DEBUGF 1,"Creating ring\n"
@ -609,16 +616,7 @@ create_ring:
mov [esi + sizeof.NET_BUFF + rxfd.count], 0
mov [esi + sizeof.NET_BUFF + rxfd.size], 1528
;-----------------------
; build txfd structure
lea eax, [ebx + device.txfd.status]
invoke GetPhysAddr
mov [ebx + device.txfd.link], eax
mov [ebx + device.txfd.count], 0x01208000
lea eax, [ebx + device.txfd.buf_addr0]
invoke GetPhysAddr
mov [ebx + device.txfd.desc_addr], eax
ret
.out_of_mem:
@ -626,6 +624,38 @@ create_ring:
align 4
init_tx_ring:
DEBUGF 1,"Creating TX ring\n"
lea esi, [ebx + device.tx_ring]
mov eax, esi
invoke GetPhysAddr
mov ecx, TX_RING_SIZE
.next_desc:
mov [esi + txfd.status], 0
mov [esi + txfd.command], 0
lea edx, [eax + txfd.buf_addr]
mov [esi + txfd.desc_addr], edx
add eax, sizeof.txfd
mov [esi + txfd.link], eax
mov [esi + txfd.count], 0x01208000 ; One buffer, 0x20 bytes of transmit threshold, end of frame
add esi, sizeof.txfd
dec ecx
jnz .next_desc
lea eax, [ebx + device.tx_ring]
invoke GetPhysAddr
mov dword[ebx + device.tx_ring + sizeof.txfd*(TX_RING_SIZE-1) + txfd.link], eax
mov [ebx + device.cur_tx], 0
mov [ebx + device.last_tx], 0
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Transmit ;;
@ -652,45 +682,62 @@ proc transmit stdcall bufferptr
cmp [esi + NET_BUFF.length], 60
jb .fail
;;; TODO: check if current descriptor is in use
; fill in buffer address and size
mov eax, [bufferptr]
mov [ebx + device.last_tx_buffer], eax
add eax, [eax + NET_BUFF.offset]
invoke GetPhysAddr
mov [ebx + device.txfd.buf_addr0], eax
mov ecx, [bufferptr]
mov ecx, [ecx + NET_BUFF.length]
mov [ebx + device.txfd.buf_size0], ecx
; Get current TX descriptor
mov edi, [ebx + device.cur_tx]
mov eax, sizeof.txfd
mul edi
lea edi, [ebx + device.tx_ring + eax]
mov [ebx + device.txfd.status], 0
mov [ebx + device.txfd.command], Cmdsuspend + CmdTx + CmdTxFlex ;+ 1 shl 15 ;;; EL bit
; mov [txfd.count], 0x02208000 ;;;;;;;;;;;
; Check if current descriptor is free or still in use
cmp [edi + txfd.status], 0
jne .fail
; Fill in status and command values
mov [edi + txfd.status], 0
mov [edi + txfd.command], Cmdsuspend + CmdTx + CmdTxFlex ;;;+ 1 shl 15 ;;; EL bit
mov [edi + txfd.count], 0x01208000
; Fill in buffer address and size
mov [edi + txfd.virt_addr], esi
mov eax, esi
add eax, [esi + NET_BUFF.offset]
push edi
invoke GetPhysAddr
pop edi
mov [edi + txfd.buf_addr], eax
mov ecx, [esi + NET_BUFF.length]
mov [edi + txfd.buf_size], ecx
; Inform device of the new/updated transmit descriptor
lea eax, [ebx + device.txfd.status]
mov eax, edi
invoke GetPhysAddr
set_io [ebx + device.io_addr], 0
set_io [ebx + device.io_addr], reg_scb_ptr
out dx, eax
; Start the transmit
mov ax, CU_START
set_io [ebx + device.io_addr], reg_scb_cmd
mov ax, CU_START
out dx, ax
call cmd_wait
; Update stats
; Update stats
inc [ebx + device.packets_tx]
add dword[ebx + device.bytes_tx], ecx
adc dword[ebx + device.bytes_tx + 4], 0
; Wait for command to complete
call cmd_wait
inc [ebx + device.cur_tx]
and [ebx + device.cur_tx], TX_RING_SIZE - 1
DEBUGF 1,"Transmit OK\n"
popf
xor eax, eax
ret
.fail:
DEBUGF 2,"Transmit failed!\n"
invoke NetFree, [bufferptr]
popf
or eax, -1
@ -808,18 +855,37 @@ int_handler:
.no_rx:
; Cleanup after TX
cmp [ebx + device.txfd.status], 0
je .done
cmp [ebx + device.last_tx_buffer], 0
je .done
push ax
DEBUGF 1, "Removing packet 0x%x from RAM!\n", [ebx + device.last_tx_buffer]
invoke KernelFree, [ebx + device.last_tx_buffer]
mov [ebx + device.last_tx_buffer], 0
pop ax
test ax, 1 shl 13
jz .no_tx
DEBUGF 1, "Command completed\n"
push eax
.loop_tx:
mov edi, [ebx + device.last_tx]
mov eax, sizeof.txfd
mul eax
lea edi, [ebx + device.tx_ring + eax]
cmp [edi + txfd.status], 0
je .tx_done
cmp [edi + txfd.virt_addr], 0
je .tx_done
DEBUGF 1,"Freeing buffer 0x%x\n", [edi + txfd.virt_addr]
push [edi + txfd.virt_addr]
mov [edi + txfd.virt_addr], 0
invoke NetFree
inc [ebx + device.last_tx]
and [ebx + device.last_tx], TX_RING_SIZE - 1
jmp .loop_tx
.tx_done:
pop eax
.no_tx:
.done:
and ax, 00111100b
cmp ax, 00001000b
jne .fail