KolibriOS/kolibrios
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i8255x: Improved interrupt handling.

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git-svn-id: svn://kolibrios.org@9232 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2021-11-02 20:34:40 +00:00
parent 14beceb157
commit 3bd9001d45
1 changed files with 60 additions and 53 deletions
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113
drivers/ethernet/i8255x.asm
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@ -1,6 +1,6 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2017. All rights reserved. ;;
;; Copyright (C) KolibriOS team 2004-2021. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; i8255x (Intel eepro 100) driver for KolibriOS ;;
@ -27,14 +27,18 @@ entry START
COMPATIBLE_API = 0x0100
API_VERSION = (COMPATIBLE_API shl 16) + CURRENT_API
MAX_DEVICES = 16
; configureable area
TX_RING_SIZE = 16
MAX_DEVICES = 16 ; Maximum number of devices this driver may handle
DEBUG = 1
__DEBUG__ = 1
TX_RING_SIZE = 16 ; Number of packets in send ring buffer
RX_RING_SIZE = 1 ; Number of packets in receive ring buffer
__DEBUG__ = 1 ; 1 = on, 0 = off
__DEBUG_LEVEL__ = 2 ; 1 = verbose, 2 = errors only
; end configureable area
section '.flat' readable writable executable
include '../proc32.inc'
@ -43,6 +47,16 @@ include '../macros.inc'
include '../fdo.inc'
include '../netdrv.inc'
if (bsr TX_RING_SIZE)>(bsf TX_RING_SIZE)
display 'TX_RING_SIZE must be a power of two'
err
end if
if (RX_RING_SIZE)<>(1)
display 'RX_RING_SIZE must be 1'
err
end if
; I/O registers
REG_SCB_STATUS = 0
REG_SCB_CMD = 2
@ -64,7 +78,7 @@ EE_SK = 1 shl 0 ; serial clock
EE_CS = 1 shl 1 ; chip select
EE_DI = 1 shl 2 ; data in
EE_DO = 1 shl 3 ; data out
EE_MASK = EE_SK + EE_CS + EE_DI + EE_DO
EE_MASK = EE_SK or EE_CS or EE_DI or EE_DO
; opcodes, first bit is start bit and must be 1
EE_READ = 110b
EE_WRITE = 101b
@ -581,7 +595,7 @@ reset:
;-------------------------
; Individual address setup
mov [ebx + device.confcmd.command], TXFD_CMD_IA + TXFD_CMD_SUSPEND
mov [ebx + device.confcmd.command], TXFD_CMD_IA or TXFD_CMD_SUSPEND
mov [ebx + device.confcmd.status], 0
lea eax, [ebx + device.tx_ring]
invoke GetPhysAddr
@ -604,7 +618,7 @@ reset:
;-------------
; Configure CU
mov [ebx + device.confcmd.command], TXFD_CMD_CFG + TXFD_CMD_SUSPEND
mov [ebx + device.confcmd.command], TXFD_CMD_CFG or TXFD_CMD_SUSPEND
mov [ebx + device.confcmd.status], 0
lea eax, [ebx + device.confcmd.status]
invoke GetPhysAddr
@ -704,13 +718,13 @@ init_tx_ring:
;; Transmit ;;
;; ;;
;; In: pointer to device structure in ebx ;;
;; Out: eax = 0 on success ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 16
proc transmit stdcall bufferptr
pushf
cli
spin_lock_irqsave
mov esi, [bufferptr]
DEBUGF 1,"Transmitting packet, buffer:%x, size:%u\n", [bufferptr], [esi + NET_BUFF.length]
@ -721,9 +735,9 @@ proc transmit stdcall bufferptr
[eax+13]:2,[eax+12]:2
cmp [esi + NET_BUFF.length], 1514
ja .fail
ja .error
cmp [esi + NET_BUFF.length], 60
jb .fail
jb .error
; Get current TX descriptor
mov edi, [ebx + device.cur_tx]
@ -733,11 +747,11 @@ proc transmit stdcall bufferptr
; Check if current descriptor is free or still in use
cmp [edi + txfd.status], 0
jne .fail
jne .overrun
; Fill in status and command values
mov [edi + txfd.status], 0
mov [edi + txfd.command], TXFD_CMD_SUSPEND + TXFD_CMD_TX + TXFD_CMD_TX_FLEX
mov [edi + txfd.command], TXFD_CMD_SUSPEND or TXFD_CMD_TX or TXFD_CMD_TX_FLEX
mov [edi + txfd.count], 0x01208000
; Fill in buffer address and size
@ -768,21 +782,31 @@ proc transmit stdcall bufferptr
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
; Wait for command to complete
call cmd_wait
spin_unlock_irqrestore
xor eax, eax
ret
.fail:
DEBUGF 2,"Transmit failed!\n"
.error:
DEBUGF 2, "TX packet error\n"
inc [ebx + device.packets_tx_err]
invoke NetFree, [bufferptr]
popf
spin_unlock_irqrestore
or eax, -1
ret
.overrun:
DEBUGF 2, "TX overrun\n"
inc [ebx + device.packets_tx_ovr]
invoke NetFree, [bufferptr]
spin_unlock_irqrestore
or eax, -1
ret
@ -794,42 +818,24 @@ endp
;; Interrupt handler ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;
align 4
align 16
int_handler:
push ebx esi edi
DEBUGF 1,"INT\n"
mov ebx, [esp+4*4]
DEBUGF 1,"INT for 0x%x\n", ebx
; find pointer of device wich made IRQ occur
mov ecx, [devices]
test ecx, ecx
jz .nothing
mov esi, device_list
.nextdevice:
mov ebx, [esi]
; TODO? if we are paranoid, we can check that the value from ebx is present in the current device_list
; set_io [ebx + device.io_addr], 0 ; REG_SCB_STATUS = 0
set_io [ebx + device.io_addr], REG_SCB_STATUS
in ax, dx
out dx, ax ; send it back to ACK
test ax, ax
jnz .got_it
.continue:
add esi, 4
dec ecx
jnz .nextdevice
.nothing:
pop edi esi ebx
xor eax, eax
jz .nothing
out dx, ax ; send it back to ACK
ret ; If no device was found, abort (The irq was probably for a device, not registered to this driver)
.got_it:
DEBUGF 1,"Device: %x Status: %x\n", ebx, ax
DEBUGF 1,"Status: %x\n", ax
test ax, SCB_STATUS_FR ; did we receive a frame?
jz .no_rx
@ -958,18 +964,22 @@ int_handler:
.no_tx:
test ax, RU_STATUS_NO_RESOURCES
jne .fail
jz .not_out_of_resources
DEBUGF 2, "Out of resources!\n"
.fail:
.not_out_of_resources:
pop edi esi ebx
xor eax, eax
inc eax
ret
.nothing:
pop edi esi ebx
xor eax, eax
ret
align 4
@ -983,9 +993,6 @@ cmd_wait:
align 4
ee_read: ; esi = address to read