FreeBSD 9.2 ARM dma bug

[Fabien Thomas]

Hi,

I've been trying to boot a recent FreeBSD 9.2 on kirkwood but it seems that dma code is broken.
Is there a known problem on this?

I've found that r251874 seems to introduce the problem.

Fabien


Failed boot (the error message is about number of segment but in fact the dma subsystem return EFBIG):

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FreeBSD 9.1-STABLE #23 r251874+3a840b9-dirty: Wed Sep 11 12:21:33 CEST 2013
   fabient at refbench:/home/fabient/obj/arm.arm/data/usr/home/fabient/fabient-freebsd/sys/X10 arm
gcc version 4.2.1 20070831 patched [FreeBSD]
WARNING: WITNESS option enabled, expect reduced performance.
WARNING: DIAGNOSTIC option enabled, expect reduced performance.
CPU: Feroceon 88FR131 rev 1 (Marvell core)
 DC enabled IC enabled WB enabled EABT branch prediction enabled
 16KB/32B 4-way Instruction cache
 16KB/32B 4-way write-back-locking-C Data cache
real memory  = 536870912 (512 MB)
avail memory = 516317184 (492 MB)
SOC: Marvell 88F6281 rev A1, TClock 200MHz
simplebus0: <Flattened device tree simple bus> on fdtbus0
ic0: <Marvell Integrated Interrupt Controller> mem 0xf1020200-0xf102023b on simplebus0
timer0: <Marvell CPU Timer> mem 0xf1020300-0xf102032f irq 1 on simplebus0
Event timer "CPUTimer0" frequency 200000000 Hz quality 1000
Timecounter "CPUTimer1" frequency 200000000 Hz quality 1000
gpio0: <Marvell Integrated GPIO Controller> mem 0xf1010100-0xf101011f irq 35,36,37,38,39,40,41 on simplebus0
device_attach: gpio0 attach returned 6
gpio0: <Marvell Integrated GPIO Controller> on simplebus0
simplebus0: no default resources for rid = 0, type = 3
gpio0: could not allocate resources
device_attach: gpio0 attach returned 6
rtc0: <Marvell Integrated RTC> mem 0xf1010300-0xf1010307 on simplebus0
twsi0: <Marvell Integrated I2C Bus Controller> mem 0xf1011000-0xf101101f irq 43 on simplebus0
iicbus0: <Philips I2C bus> on twsi0
iic0: <I2C generic I/O> on iicbus0
iicbus0: <unknown card> at addr 0
mge0: <Marvell Gigabit Ethernet controller> mem 0xf1072000-0xf1073fff irq 12,13,14,11,46 on simplebus0
panic: wrong number of segments, should be 1
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      $d:     ldrb    r15, [r15, r15, ror r15]!

db> bt
Tracing pid 0 tid 100000 td 0xc0cab420
kdb_enter() at kdb_enter+0x14
scp=0xc0a0cebc rlv=0xc09dc73c (panic+0x128)
       rsp=0xc0f32b2c rfp=0xc0f32b40
       r5=0xc0cba8cc r4=0x00000100
panic() at panic+0x18
scp=0xc09dc62c rlv=0xc0bc7914 ($d)
       rsp=0xc0f32b54 rfp=0xc0f32b60
mge_get_dma_addr() at mge_get_dma_addr+0x18
scp=0xc0bc7908 rlv=0xc0a094ec (bus_dmamap_load+0x100)
       rsp=0xc0f32b64 rfp=0xc0f32bc4
bus_dmamap_load() at bus_dmamap_load+0x10
scp=0xc0a093fc rlv=0xc0bc8fe8 (mge_alloc_desc_dma+0x7c)
       rsp=0xc0f32bc8 rfp=0xc0f32c24
       r10=0x00000100 r9=0x00001000
       r8=0x00000000 r7=0x00000000 r6=0xc3853000 r5=0x000000ff
       r4=0xc38544cc
mge_alloc_desc_dma() at mge_alloc_desc_dma+0x10
scp=0xc0bc8f7c rlv=0xc0bc9528 (mge_attach+0x284)
       rsp=0xc0f32c28 rfp=0xc0f32cac