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i8254x: dont crash when out of memory.

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git-svn-id: svn://kolibrios.org@5156 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2014-11-01 18:39:23 +00:00
parent 22d5b72b64
commit 35addf1d02
1 changed files with 35 additions and 5 deletions
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40
drivers/ethernet/i8254x.asm
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@ -277,11 +277,9 @@ struct device ETH_DEVICE
last_tx dd ?
rb 0x100 - ($ and 0xff) ; align 256
rx_desc rb RX_RING_SIZE*sizeof.RDESC*2
rb 0x100 - ($ and 0xff) ; align 256
tx_desc rb TX_RING_SIZE*sizeof.TDESC*2
ends
@ -416,6 +414,8 @@ proc service_proc stdcall, ioctl:dword
inc [devices] ;
call start_i8254x
test eax, eax
jnz .destroy
mov [ebx + device.type], NET_TYPE_ETH
invoke NetRegDev
@ -443,6 +443,7 @@ proc service_proc stdcall, ioctl:dword
invoke KernelFree, ebx
.fail:
DEBUGF 2,"Loading driver failed\n"
or eax, -1
ret
@ -459,6 +460,9 @@ endp
align 4
unload:
DEBUGF 1,"Unload\n"
; TODO: (in this particular order)
;
; - Stop the device
@ -469,7 +473,7 @@ unload:
or eax, -1
ret
ret
@ -540,9 +544,12 @@ reset_dontstart:
stosd
call init_rx
test eax, eax
jnz .fail
call init_tx
xor eax, eax
.fail:
ret
@ -553,9 +560,10 @@ init_rx:
lea edi, [ebx + device.rx_desc]
mov ecx, RX_RING_SIZE
.loop:
push ecx
push edi
push ecx edi
invoke KernelAlloc, MAX_PKT_SIZE
test eax, eax
jz .out_of_mem
DEBUGF 1,"RX buffer: 0x%x\n", eax
pop edi
mov dword[edi + RX_RING_SIZE*sizeof.RDESC], eax
@ -582,7 +590,13 @@ init_rx:
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
xor eax, eax ; success!
ret
.out_of_mem:
DEBUGF 2,"Out of memory!\n"
pop edi ecx
or eax, -1 ; error!
ret
@ -620,7 +634,12 @@ init_tx:
align 4
reset:
call reset_dontstart
test eax, eax
je start_i8254x
ret
align 4
start_i8254x:
mov esi, [ebx + device.mmio_addr]
@ -826,6 +845,8 @@ int_handler:
push esi
invoke KernelAlloc, MAX_PKT_SIZE
pop esi
test eax, eax
jz .out_of_mem
mov dword[esi + RX_RING_SIZE*sizeof.RDESC], eax
invoke GetPhysAddr
mov [esi + RDESC.addr_l], eax
@ -837,6 +858,15 @@ int_handler:
mov eax, [ebx + device.cur_rx]
mov [esi + REG_RDT], eax
; Move to next rx desc
inc [ebx + device.cur_rx]
and [ebx + device.cur_rx], RX_RING_SIZE-1
jmp [Eth_input]
.out_of_mem:
DEBUGF 2,"Out of memory!\n"
; Move to next rx desc
inc [ebx + device.cur_rx]
and [ebx + device.cur_rx], RX_RING_SIZE-1