[#5218] bfin-dma test program fail to execute
Submitted By: Vivi Li
Open Date
2009-06-08 06:44:58 Close Date
2009-06-24 03:27:25
Priority:
Medium High Assignee:
Graf Yang
Status:
Closed Fixed In Release:
N/A
Found In Release:
N/A Release:
Category:
N/A Board:
N/A
Processor:
ALL Silicon Revision:
Is this bug repeatable?:
Yes Resolution:
Fixed
Uboot version or rev.:
Toolchain version or rev.:
gcc4.1-09r1_rc6
App binary format:
N/A
Summary: bfin-dma test program fail to execute
Details:
Test bfin-dma driver in bf537 with a test program in wiki http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:drivers:bfin-dma, the test program stucks and fail to execute.
Bellow is the log:
--
Linux version 2.6.28.10-ADI-2009R1-svn6600 (test@uclinux50-bf537-ad9960-ad1836) (gcc version 4.1.2 (ADI svn)) #8 Mon Jun 8 16:099
console [early_BFuart0] enabled
early printk enabled on early_BFuart0
Warning: limiting memory to 56MB due to hardware anomaly 05000263
Board Memory: 64MB
Kernel Managed Memory: 64MB
Memory map:
fixedcode = 0x00000400-0x00000490
text = 0x00001000-0x00106000
rodata = 0x00106000-0x001577b4
bss = 0x00158000-0x00169744
data = 0x00169744-0x0017a000
stack = 0x00178000-0x0017a000
init = 0x0017a000-0x008c0000
available = 0x008c0000-0x037ff000
DMA Zone = 0x03f00000-0x04000000
Hardware Trace Active and Enabled
Boot Mode: 0
Reset caused by Software reset
Blackfin support (C) 2004-2009 Analog Devices, Inc.
Compiled for ADSP-BF537 Rev 0.2
Blackfin Linux support by http://blackfin.uclinux.org/
Processor Speed: 500 MHz core clock and 125 MHz System Clock
NOMPU: setting up cplb tables
Instruction Cache Enabled for CPU0
Data Cache Enabled for CPU0 (write-back)
Built 1 zonelists in Zone order, mobility grouping off. Total pages: 14223
Kernel command line: root=/dev/mtdblock0 rw clkin_hz=25000000 earlyprintk=serial,uart0,57600 console=ttyBF0,57600 ip=10.100.4.50f
Configuring Blackfin Priority Driven Interrupts
PID hash table entries: 256 (order: 8, 1024 bytes)
console handover: boot [early_BFuart0] -> real [ttyBF0]
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory available: 47812k/65536k RAM, (7448k init code, 1044k kernel code, 464k data, 1024k dma, 7744k reserved)
Calibrating delay loop... 995.32 BogoMIPS (lpj=1990656)
Security Framework initialized
Mount-cache hash table entries: 512
Blackfin Scratchpad data SRAM: 4 KB
Blackfin L1 Data A SRAM: 16 KB (15 KB free)
Blackfin L1 Data B SRAM: 16 KB (16 KB free)
Blackfin L1 Instruction SRAM: 48 KB (37 KB free)
net_namespace: 288 bytes
NET: Registered protocol family 16
Blackfin DMA Controller
stamp_init(): registering device resources
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 2, 16384 bytes)
TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
TCP reno registered
NET: Registered protocol family 1
msgmni has been set to 93
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler cfq registered
bfin-jtag-comm: initialized
Serial: Blackfin serial driver
bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 18) is a BFIN-UART
brd: module loaded
bfin_mii_bus: probed
bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=24)@sclk=125MHz)
bfin_mac bfin_mac.0: Blackfin on-chip Ethernet MAC driver, Version 1.1
bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs_base@ffc00500, dma channel@7
rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0
bfin-wdt: initialized: timeout=20 sec (nowayout=0)
TCP cubic registered
NET: Registered protocol family 17
rtc-bfin rtc-bfin: setting system clock to 1970-01-08 10:01:32 UTC (640892)
IP-Config: Complete:
device=eth0, addr=10.100.4.50, mask=255.255.255.0, gw=10.100.4.174,
host=bf537-stamp, domain=, nis-domain=(none),
bootserver=10.100.4.174, rootserver=10.100.4.174, rootpath=
Freeing unused kernel memory: 7448k freed
dma_alloc_init: dma_page @ 0x008bc000 - 256 pages at 0x03f00000
_____________________________________
a8888b. / Welcome to the uClinux distribution \
d888888b. / _ _ \
8P"YP"Y88 / | | |_| __ __ (TM) |
8|o||o|88 _____/ | | _ ____ _ _ \ \/ / |
8' .88 \ | | | | _ \| | | | \ / |
8`._.' Y8. \ | |__ | | | | | |_| | / \ |
d/ `8b. \ \____||_|_| |_|\____|/_/\_\ |
dP . Y8b. \ For embedded processors including |
d8:' " `::88b \ the Analog Devices Blackfin /
d8" 'Y88b \___________________________________/
:8P ' :888
8a. : _a88P For further information, check out:
._/"Yaa_: .| 88P| - http://blackfin.uclinux.org/
\ YP" `| 8P `. - http://docs.blackfin.uclinux.org/
/ \.___.d| .' - http://www.uclinux.org/
`--..__)8888P`._.' jgs/a:f - http://www.analog.com/blackfin
Have a lot of fun...
BusyBox v1.13.4 (2009-06-08 16:03:01 CST) built-in shell (msh)
Enter 'help' for a list of built-in commands.
root:/> PHY: 0:01 - Link is Up - 100/Full
root:/>
root:/> modprobe bfin-dma
bfin-dma: initialized
root:/> ./bfindma_test
open(/dev/bfin-dma) = 3
ioctl(3, 0, 1834732) = 0
--
Follow-ups
--- Mike Frysinger 2009-06-19 06:04:57
my findings were that the dmasg structure was passed up to the driver properly:
userspace passes these to the driver via the icoctl and the driver copies it to
its own local storge
but then bdi_do_dma() did:
- set the next_desc_addr properly
- set the right config registers
- start the dma channels
- dma channels immediately finished and were reset back to nothing
no idea why
--- Graf Yang 2009-06-23 00:03:45
Fixed both on trunk and branch 09R1, the DMA descriptors are copied from user
space, so they may not synced with external memory. After adding flushes, this
test work fine.
--- Mike Frysinger 2009-06-23 00:09:21
the first descriptor is copied, but the latter ones are not ... so only need to
flush the first one
--- Graf Yang 2009-06-23 00:20:54
As we don't know how the user building these descriptors, so I think flush every
one is safe.
--- Mike Frysinger 2009-06-23 00:26:38
yeah, you're right
--- Vivi Li 2009-06-24 03:27:25
OK now. Close it.
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