Hi all !
I had problems with Epat Shuttle HDD driver and kernel 2.4.2 drivers.
After aplying patch -ac20 all seams to be OK. Thanks to all very
much.
But now I have some questions.
Q1) Why used drivers (pd+epat+paride+parport_pc) are not using
interrupts ? It is necessarily alocate irq for parport_pc module ?
Can I expect better performance if it would be using irq ?
I thought that printing support (lp module) are running in pooled
mode and is NOT using irq, while data transfer protocols USES irq.
but in /proc/interrupts is :
CPU0
....
7: 3 XT-PIC parport0
after copying cca 20 MB. Why ?
Q2) Which performance is accessible for data transport from external
hdd through LPT port ? Can I enhance it with any setting (e.g. ECP
support, dma using ...) ?
Maximal speed is about 750 kB/s.
hw : MSI 6163Pro mainboard with onboard LPT port in EPP mode
(protocol EPP 1.9)
sw : RH 7.0, kernel 2.4.2-ac20 (and 2.2.16 too)
driver : parport_pc + paride + epat + pd (in mode 5 == EPP-32)
# modprobe parport_pc :
... kernel: parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE,EPP]
... kernel: parport0: cpp_mux: aa55f00f52ad51(06)
... kernel: parport0: Found 1 daisy-chained devices
# modprobe pd verbose=1
pd: pd version 1.05, major 45, cluster 64, nice 0
pda: epat: port 0x3bc, mode 0, ccr ff, test=(255,255,510)
pda: epat: port 0x3bc, mode 1, ccr ff, test=(255,255,510)
pda: epat: port 0x3bc, mode 2, ccr ff, test=(255,255,510)
pda: 0x378 is parport0
pda: epat: port 0x378, mode 0, ccr 0, test=(0,0,0)
pda: epat: port 0x378, mode 1, ccr 40, test=(224,224,448)
pda: epat: port 0x378, mode 2, ccr 0, test=(0,0,0)
pda: epat: port 0x378, mode 3, ccr 0, test=(0,0,0)
pda: epat: port 0x378, mode 4, ccr 0, test=(0,0,0)
pda: epat: port 0x378, mode 5, ccr 0, test=(0,0,0)
pda: Sharing parport0 at 0x378
pda: epat 1.01, Shuttle EPAT chip c5 at 0x378, mode 5 (EPP-32),delay1
pda: Maxtor 90288D2, master, 5627664 blocks [2747M], (5583/16/63),
fixed media
I tried ECP mode :
BIOS setting :
EPP+ECP mode
kernel setting :
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_PARPORT_PC_FIFO=y
CONFIG_PARPORT_PC_SUPERIO=y
CONFIG_PARPORT_1284=y
modules setting :
alias parport_lowlevel parport_pc
options parport_pc io=0x378 irq=7 dma=3
alias block-major-45 pd
below pd epat parport_lowlevel
Result is very very bad :
# modprobe parport_pc :
...kernel: 0x378: FIFO is 16 bytes
...kernel: 0x378: writeIntrThreshold is 16
...kernel: 0x378: readIntrThreshold is 16
...kernel: 0x378: PWord is 8 bits
...kernel: 0x378: Interrupts are ISA-Pulses
...kernel: 0x378: ECP port cfgA=0x10 cfgB=0x48
...kernel: 0x378: ECP settings irq=7 dma=<none or set by other means>
...kernel: parport0: PC-style at 0x378 (0x778), irq 7, dma 3
[PCSPP,TRISTATE,COMPAT,EPP,ECP,DMA]
...kernel: parport0: cpp_mux: aa55f00f52ad51(07)
...kernel: parport0: Found 1 daisy-chained devices
# modprobe pd verbose=1
pd: pd version 1.05, major 45, cluster 64, nice 0
pda: epat: port 0x3bc, mode 0, ccr ff, test=(255,255,510)
pda: epat: port 0x3bc, mode 1, ccr ff, test=(255,255,510)
pda: epat: port 0x3bc, mode 2, ccr ff, test=(255,255,510)
pda: 0x378 is parport0
pda: epat: port 0x378, mode 0, ccr 0, test=(0,0,0)
pda: epat: port 0x378, mode 1, ccr 40, test=(224,224,448)
pda: epat: port 0x378, mode 2, ccr 0, test=(0,0,0)
pda: epat: port 0x378, mode 3, ccr ff, test=(255,255,510)
pda: epat: port 0x378, mode 4, ccr ff, test=(255,255,510)
pda: epat: port 0x378, mode 5, ccr ff, test=(255,255,510)
pda: Sharing parport0 at 0x378
pda: epat 1.01, Shuttle EPAT chip c5 at 0x378, mode 2 (8-bit), delay 1
pda: Maxtor 90288D2, master, 5627664 blocks [2747M], (5583/16/63),
fixed media
# cat /proc/interrupts :
CPU0
....
7: 3 XT-PIC parport0
# cat /proc/dma :
...
3: parport0
Both irq and dma is now allocated, but pd driver is running only in
mode 2 and speed is about 200 kB/s.
Q3) How can I use two hdd simultaneously ? When I use epat shuttle as
additional device and this drivers are compiled as modules, I must
set pd options as :
options pd drive0=0x378,,,5,,,,0 drive1=0x378,,,5,,,,1
But when I want use pda disk as root device, I must compile this
drivers into kernel (and boot from flopy). In this case I cannoot use
secondary disk (pdb device). Which kernel parameters can solve it ?
Thank you for any answer.
Miroslav BENES
System administrator
TENEZ a.s.
Chotebor
Czech Republic
www.tenez.cz
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