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i8254x driver: use more then one RX descriptor.

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git-svn-id: svn://kolibrios.org@4512 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2014-01-22 21:28:03 +00:00
parent 74965458e3
commit eee492f327
1 changed files with 145 additions and 94 deletions
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147
drivers/ethernet/i8254x.asm
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@ -27,7 +27,9 @@ format MS COFF
__DEBUG__ = 1
__DEBUG_LEVEL__ = 2 ; 1 = verbose, 2 = errors only
MAX_PKT_SIZE = 16384 ; Maximum packet size
MAX_PKT_SIZE = 4096 ; Maximum packet size
RX_RING_SIZE = 8 ; Must be a multiple of 8
include '../struct.inc'
include '../macros.inc'
@ -260,11 +262,12 @@ virtual at ebx
.pci_dev dd ?
.irq_line db ?
.cur_rx dd ?
.cur_tx dd ?
.last_tx dd ?
rb 0x100 - (($ - device) and 0xff)
.rx_desc rd 256/8
.rx_desc rd RX_RING_SIZE*8
rb 0x100 - (($ - device) and 0xff)
.tx_desc rd 256/8
@ -273,6 +276,7 @@ virtual at ebx
end virtual
section '.flat' code readable align 16
@ -518,7 +522,7 @@ reset_dontstart:
mov eax, dword [esi + REG_ICR] ; Clear any pending interrupts
mov dword [esi + REG_ITR], 0 ; Disable interrupt throttling logic
mov dword [esi + REG_PBA], 0x00000030 ; PBA: set the RX buffer size to 48KB (TX buffer is calculated as 64-RX buffer)
mov dword [esi + REG_PBA], 0x00000004 ; PBA: set the RX buffer size to 4KB (TX buffer is calculated as 64-RX buffer)
mov dword [esi + REG_RDTR], 0 ; RDTR: set no delay
mov dword [esi + REG_TXCW], 0x08008060 ; TXCW: set ANE, TxConfigWord (Half/Full duplex, Next Page Reqest)
@ -535,21 +539,56 @@ reset_dontstart:
stosd
stosd
stdcall KernelAlloc, 48*1024
mov dword [device.rx_desc + 16], eax
call init_rx
call init_tx
xor eax, eax
ret
align 4
init_rx:
lea edi, [device.rx_desc]
mov ecx, RX_RING_SIZE
.loop:
push ecx
push edi
stdcall KernelAlloc, MAX_PKT_SIZE
DEBUGF 1,"RX buffer: 0x%x\n", eax
pop edi
mov dword[edi + 16*RX_RING_SIZE], eax
push edi
GetRealAddr
mov dword [device.rx_desc], eax
mov dword [device.rx_desc + 4], 0
pop edi
mov dword[edi], eax ; addres low
mov dword[edi + 4], 0 ; addres high
mov dword[edi + 8], 0
mov dword[edi + 12], 0
add edi, 16
pop ecx
dec ecx
jnz .loop
mov [device.cur_rx], 0
lea eax, [device.rx_desc]
GetRealAddr
mov dword[esi + REG_RDBAL], eax ; Receive Descriptor Base Address Low
mov dword[esi + REG_RDBAH], 0 ; Receive Descriptor Base Address High
mov dword [esi + REG_RDLEN], (1 * 128) ; Receive Descriptor Length
mov dword[esi + REG_RDLEN], 16*RX_RING_SIZE ; Receive Descriptor Length
mov dword[esi + REG_RDH], 0 ; Receive Descriptor Head
mov dword [esi + REG_RDT], 1 ; Receive Descriptor Tail
mov dword [esi + REG_RCTL], RCTL_EN or RCTL_SBP or RCTL_BAM or RCTL_SECRC or RCTL_UPE or RCTL_MPE
; Receiver Enable, Store Bad Packets, Broadcast Accept Mode, Strip Ethernet CRC from incoming packet, Promiscuous mode
mov dword[esi + REG_RDT], RX_RING_SIZE-1 ; Receive Descriptor Tail
mov dword[esi + REG_RCTL], RCTL_SBP or RCTL_BAM or RCTL_SECRC or RCTL_UPE or RCTL_MPE
; Store Bad Packets, Broadcast Accept Mode, Strip Ethernet CRC from incoming packet, Promiscuous mode
ret
align 4
init_tx:
mov dword[device.tx_desc], 0
mov dword[device.tx_desc + 4], 0
@ -565,22 +604,25 @@ reset_dontstart:
mov dword[esi + REG_TCTL], 0x010400fa ; Enabled, Pad Short Packets, 15 retrys, 64-byte COLD, Re-transmit on Late Collision
mov dword[esi + REG_TIPG], 0x0060200A ; IPGT 10, IPGR1 8, IPGR2 6
xor eax, eax
ret
align 4
reset:
call reset_dontstart
start_i8254x:
mov esi, [device.mmio_addr]
or dword[esi + REG_RCTL], RCTL_EN
xor eax, eax
mov [esi + REG_RDTR], eax ; Clear the Receive Delay Timer Register
mov [esi + REG_RADV], eax ; Clear the Receive Interrupt Absolute Delay Timer
mov [esi + REG_RSRPD], eax ; Clear the Receive Small Packet Detect Interrupt
; or eax, 1 shl 0 + 1 shl 7 ; TXDW + RXT0
mov eax, 1+4+16 ;;;; hack!
mov [esi + REG_IMS], eax ; Enable interrupt types
mov dword[esi + REG_IMS], 0x1F6DC ; Enable interrupt types
mov eax, [esi + REG_ICR] ; Clear pending interrupts
mov [device.mtu], 1514
@ -637,23 +679,22 @@ read_mac:
;; ;;
;; Transmit ;;
;; ;;
;; In: buffer pointer in [esp+4] ;;
;; size of buffer in [esp+8] ;;
;; pointer to device structure in ebx ;;
;; In: pointer to device structure in ebx ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
transmit:
DEBUGF 1,"\nTransmitting packet, buffer:%x, size:%u\n", [esp+4], [esp+8]
mov eax, [esp+4]
proc transmit stdcall bufferptr, buffersize
DEBUGF 1,"Transmitting packet, buffer:%x, size:%u\n", [bufferptr], [buffersize]
mov eax, [bufferptr]
DEBUGF 1,"To: %x-%x-%x-%x-%x-%x From: %x-%x-%x-%x-%x-%x Type:%x%x\n",\
[eax+00]:2,[eax+01]:2,[eax+02]:2,[eax+03]:2,[eax+04]:2,[eax+05]:2,\
[eax+06]:2,[eax+07]:2,[eax+08]:2,[eax+09]:2,[eax+10]:2,[eax+11]:2,\
[eax+13]:2,[eax+12]:2
cmp dword [esp + 8], 1514
cmp [buffersize], 1514
ja .fail
cmp dword [esp + 8], 60
cmp [buffersize], 60
jb .fail
; Program the descriptor (use legacy mode)
@ -663,7 +704,7 @@ transmit:
mov dword[edi], eax ; Real addr (for i8254x)
mov dword[edi + 4], 0x00000000 ;
mov ecx, [esp + 8]
mov ecx, [buffersize]
or ecx, 1 shl 24 + 1 shl 25 + 1 shl 27 ; EOP + IFCS + RS
mov dword[edi + 8], ecx ; Packet size
mov dword[edi + 12], 0x00000000
@ -675,18 +716,20 @@ transmit:
; Update stats
inc [device.packets_tx]
mov eax, [esp + 8]
mov eax, [buffersize]
add dword[device.bytes_tx], eax
adc dword[device.bytes_tx + 4], 0
xor eax, eax
ret 8
ret
.fail:
DEBUGF 2,"Send failed\n"
stdcall KernelFree, [esp+4]
stdcall KernelFree, [bufferptr]
or eax, -1
ret 8
ret
endp
;;;;;;;;;;;;;;;;;;;;;;;
@ -727,48 +770,56 @@ int_handler:
.got_it:
DEBUGF 1,"Device: %x Status: %x ", ebx, eax
DEBUGF 1,"Device: %x Status: %x\n", ebx, eax
;---------
; RX done?
test eax, ICR_RXDMT0
test eax, ICR_RXDMT0 + ICR_RXT0
jz .no_rx
push eax ebx
push .retaddr
.retaddr:
pop ebx eax
; Get last descriptor addr
lea esi, [device.rx_desc]
mov esi, [device.cur_rx]
shl esi, 4
lea esi, [device.rx_desc + esi]
cmp byte[esi + 12], 0 ; Check status field
je .retaddr
je .no_rx
push eax ebx
push .retaddr
movzx ecx, word[esi + 8] ; Get the packet length
DEBUGF 1,"got %u bytes\n", ecx
push ecx
push dword [esi + 16] ; Get packet pointer
push dword[esi + 16*RX_RING_SIZE] ; Get packet pointer
; Update stats
add dword[device.bytes_rx], ecx
adc dword[device.bytes_rx + 4], 0
inc dword[device.packets_rx]
; allocate new descriptor
stdcall KernelAlloc, 48*1024
mov dword [esi + 16], eax
; Allocate new descriptor
push esi
stdcall KernelAlloc, MAX_PKT_SIZE
pop esi
mov dword[esi + 16*RX_RING_SIZE], eax
GetRealAddr
mov dword[esi], eax
mov dword[esi + 8], 0
mov dword[esi + 12], 0
; reset descriptor status
; Move the receive descriptor tail
mov esi, [device.mmio_addr]
mov dword [esi + REG_RDH], 0x00000000 ; Receive Descriptor Head
mov dword [esi + REG_RDT], 0x00000001 ; Receive Descriptor Tail
mov eax, [device.cur_rx]
mov [esi + REG_RDT], eax
; Move to next rx desc
inc [device.cur_rx]
and [device.cur_rx], RX_RING_SIZE-1
jmp Eth_input
.retaddr:
pop ebx eax
.no_rx:
;--------------
@ -777,7 +828,7 @@ int_handler:
test eax, ICR_LSC
jz .no_link
DEBUGF 1,"Link Changed\n"
DEBUGF 2,"Link Changed\n"
.no_link:
@ -790,7 +841,7 @@ int_handler:
DEBUGF 1,"Transmit done\n"
lea edi, [device.tx_desc] ; Transmit Descriptor Base Address
push dword [edi + 16] ; Store the data location (for driver)
push dword[edi + 16]
call KernelFree
.no_tx: