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Description
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Category
driver
Sub-Category
other
Description
After installing Nevada b81, the first boot into the installed system pauses after the Solaris startup message (SunOS Release 5.11 .... All rights reserved.). Eventually, the system panics because it is unable to mount the root filesystem. This only occurs when the SATA controller is set to AHCI in the BIOS, and only happens with the 64-bit kernel. 32-bit works correctly, and booting into the Xen kernel works correctly.
Initial kmdb session indicates that the sata_pkt is timing out trying to identify the devices.
NOTICE: hba AHCI bersion = 1.10
pcplusmp: pciclass,010601 (ahci) instance 0 vector 0x16 ioapic 0x4
intin 0x16 is bound to cpu 0
NOTICE: ahci watchdog: port 0 satapkt 0xffffff0204a6be08 timed out
NOTICE: ahci watchdog: port 0 satapkt 0xffffff0204a6be08 timed out
... panic, unable to mount root fs ...
With some more digging, it looks like what's timing out is a sata_pkt sent from sata_fetch_device_identify_data. Looking at the sata_pkt structure at the address referenced in the timeout message, it's just sending the SATA command SATAC_ID_DEVICE (0xEC). After the long delay and packet, that sata_pkt does end up with satapkt_reason set to the value indicating a timeout.
Frequency
Always
Regression
No
Steps to Reproduce
1. Build a system with a motherboard that will exhibit this problem. I'm using an ASUS M2A-VM with the latest non-beta BIOS (1603). Attach a SATA hard drive to the motherboard.
2. In the system BIOS, set the SATA controller mode to AHCI
3. Install SXDE build 81 on to the attached SATA hard drive.
4. After installing, allow the system to boot using the default GRUB entry.
Expected Result
The system should boot normally, correctly detecting the hard drive and loading Solaris from it.
Actual Result
The system hangs for a couple minutes during boot and then eventually panics because it cannot mount the root filesystem (panic[cpu0]/thread=fffffffffbc24f20: cannot mount root path /pci@0,0/pci1043,82a)
Error Message(s)
With kernel debugger, I set moddebug=0x80000000 and a breakpoint at ahci_timeout_pkts. When I hit the breakpoint, I set ahci_debug_flags=0xffffffff and continued. The following debug messages were output:
[0]> :c
WARNING: ahci_timeout_pkts enter: port 0
WARNING: ahci_restart_port_wait_till_ready: port 0 enter
WARNING: ahci_put_port_into_notrunning_state enter: port 0
WARNING: ahci_put_port_into_notrunning_state: succeeded to clear PxCMD.CR to '06
WARNING: ahci_start_port: 0 enter
WARNING: ahci_timeout_pkts: port 0, finished_tags = 0x0, timeout_tags = 0x1, po
WARNING: ahci_mop_commands entered: port: 0 slot_status: 0x1
WARNING: ahci_mop_commands: failed_tags: 0x0, timeout_tags: 0x1 aborted_tags: 00
WARNING: ahci_mop_commands: sending up pkt 0xffffff02109d2d98 with SATA_PKT_TIMT
WARNING: ahci_tran_start sata tran accepted: port 0
WARNING: ahci_tran_start enter: cport 0 satapkt 0xffffff02109d2d98
WARNING: ahci_do_sync_start enter: port 0 spkt 0xffffff02109d2d98
WARNING: ahci_claim_free_slot enter ahciport_pending_tags = 0x0 ahciport_pendin0
WARNING: ahci_claim_free_slot: found slot: 0x0
WARNING: ahci_deliver_satapkt enter: cmd_reg: 0xa1, cmd_slot: 0x0, port: 0, sat8
WARNING: ncookies = 0x1, ahci_dma_prdt_number = 0x101
WARNING: command data direction is sata_data_direction = 0x2
WARNING:
WARNING: Command header&table for spkt 0xffffff02109d2d98 cmd_reg 0xa1 port 0
WARNING: Command Header: 10085 0 44ba000 0
WARNING: Command FIS: a18027 0 0 0
WARNING: ATAPI command: 0 0 0 0 0 0 0 0
WARNING: ATAPI command: 0 0 0 0 0 0 0 0
WARNING: Cookie 0: d7e03820 0 0 1ff
WARNING: ahci_deliver_satapkt exit: port 0
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: ahci_watchdog_handler entered
WARNING: the current slot is 0
kmdb: stop at ahci`ahci_timeout_pkts
kmdb: target stopped at:
ahci`ahci_timeout_pkts: pushq %rbp
[0]> :c
WARNING: ahci_timeout_pkts enter: port 0
WARNING: ahci_restart_port_wait_till_ready: port 0 enter
WARNING: ahci_put_port_into_notrunning_state enter: port 0
WARNING: ahci_put_port_into_notrunning_state: succeeded to clear PxCMD.CR to '06
WARNING: ahci_start_port: 0 enter
WARNING: ahci_timeout_pkts: port 0, finished_tags = 0x0, timeout_tags = 0x1, po
WARNING: ahci_mop_commands entered: port: 0 slot_status: 0x1
WARNING: ahci_mop_commands: failed_tags: 0x0, timeout_tags: 0x1 aborted_tags: 00
WARNING: ahci_mop_commands: sending up pkt 0xffffff02109d2d98 with SATA_PKT_TIMT
WARNING: ahci_tran_start sata tran accepted: port 0
WARNING: ahci_tran_probe_port enter: cport: 1, pmport: 0, qual: 4
WARNING: ahci_tran_probe_port: port 1 PORT NORMAL 0
WARNING: ahci_tran_probe_port: port 1 No device found
WARNING: ahci_tran_probe_port enter: cport: 2, pmport: 0, qual: 4
WARNING: ahci_tran_probe_port: port 2 PORT NORMAL 0
WARNING: ahci_tran_probe_port: port 2 No device found
WARNING: ahci_tran_probe_port enter: cport: 3, pmport: 0, qual: 4
WARNING: ahci_tran_probe_port: port 3 PORT NORMAL 0
WARNING: ahci_tran_probe_port: port 3 No device found
WARNING: ahci_attach success!
panic[cpu0]/thread=fffffffffbc24f20: cannot mount root path /pci@0,0/pci1043,82a
fffffffffbc44da0 genunix:rootconf+113 ()
fffffffffbc44df0 genunix:vfs_mountroot+65 ()
fffffffffbc44e30 genunix:main+128 ()
fffffffffbc44e40 unix:_locore_start+92 ()
Test Case
Workaround
- Boot into 32-bit kernel
- Boot into Xen kernel
- Don't use AHCI mode, which falls back on IDE emulation
Submitter wants to work on bug
No
Additional configuration information
Motherboard: ASUS M2A-VM, with latest (non-beta) BIOS (1603)
BIOS SATA controller mode set to "AHCI"
Nevada b81 (SXCE), 64bit
One SATA hard drive attached to controller port 0
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