My driver fails when I access the “upper” part of my virtualzed PCI-E space (Bar0 - 2MB MemWindow)
Driver is fine on x64 Ubuntu…something ARM specific?
Crash: handle kernel paging request at virtual address ffffff801020400c
Kernel: 4.9.253-tegra #1 SMP PREEMPT Mon Jul 26 12:19:28 PDT 2021 aarch64 aarch64 aarch64 GNU/Linux
Pertinent info below…appreciate any help…
Mike
map results/virtual addresses
0: Mapped global memory bar to ioremap retured ffffff8010200000 with size 2048 KB
_mil aim_mil0: Mapped IO memory bar to ffffff800b230000 with size 64 KB
[ 4.613946] aim_mil aim_mil0: Allocated shared memory to ffffff8014001000 with size 16384 KB
Crash Dump
4.654654] Unable to handle kernel paging request at virtual address ffffff801020400c
[ 4.664498] Mem abort info:
[ 4.675722] CPU2: shutdown
[ 4.676375] psci: CPU2 killed (polled 4 ms)
[ 4.744559] ESR = 0x96000061
[ 4.751733] Exception class = DABT (current EL), IL = 32 bits
[ 4.760126] SET = 0, FnV = 0
[ 4.764178] EA = 0, S1PTW = 0
[ 4.774531] Data abort info:
[ 4.777678] ISV = 0, ISS = 0x00000061
[ 4.781981] CM = 0, WnR = 1
[ 4.785428] swapper pgtable: 4k pages, 39-bit VAs, pgd = ffffff800a200000
[ 4.793023] [ffffff801020400c] *pgd=00000002371fe003, *pud=00000002371fe003, *pmd=0000000215e87003, *pte=00e8000040204707
[ 4.812628] Internal error: Oops: 96000061 [#1] PREEMPT SMP
[ 4.818221] Modules linked in: aim_mil(O+) overlay nvgpu ip_tables x_tables
[ 4.825296] CPU: 5 PID: 3154 Comm: systemd-udevd Tainted: G O 4.9.253-tegra #1
[ 4.833670] Hardware name: storm (DT)
[ 4.837345] task: ffffffc1a3086200 task.stack: ffffffc1a2274000
[ 4.843340] PC is at api_io_bm_rt_act_ini+0x7c/0x300 [aim_mil]
[ 4.849241] LR is at api_io_bm_rt_act_ini+0x208/0x300 [aim_mil]
[ 4.855179] pc : [] lr : [] pstate: 00400045
[ 4.862593] sp : ffffffc1a22777c0
[ 4.865915] x29: ffffffc1a22777c0 x28: ffffff800117ac98
[ 4.871026] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 4.876985] x27: ffffffc191300000 x26: ffffffc191310000
[ 4.882333] x25: ffffffc191312000 x24: 0000000020000000
[ 4.887680] x23: ffffffc191000000 x22: 0000000000000014
[ 4.893028] x21: 000000000000000c x20: 0000000000000000
[ 4.898375] x19: 0000000000000001 x18: 0000000000000001
[ 4.903722] x17: 0000000000000001 x16: 0000000000000007
[ 4.909069] x15: ffffffffffffffff x14: ffffff800a16edd8
[ 4.914417] x13: ffffff800a16ea17 x12: 0000000000000000
[ 4.919785] x11: 0000000000000006 x10: 00000000000003c2
[ 4.925135] x9 : 0000000000000000 x8 : ffffffc1b7052977
[ 4.930484] x7 : 0000000000000000 x6 : 0000000000000001
[ 4.935832] x5 : 0000000000000000 x4 : ffffffc1b5fecbe8
[ 4.941179] x3 : ffffffc1b5fecbe8 x2 : ffffff8010200000
[ 4.944449] bcpu-throttle-alert cooling device registered.
[ 4.945404] mcpu-throttle-alert cooling device registered.
[ 4.948151] gpu-throttle-alert cooling device registered.
[ 4.949267] gpio tegra-gpio wake18 for gpio=101(M:5)
[ 4.953080] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 4.973578] x1 : 000000000000400c x0 : ffffff801020400c
[ 4.980426] Process systemd-udevd (pid: 3154, stack limit = 0xffffffc1a2274000)
[ 4.987615] zram: Added device: zram0
[ 4.991420] Call trace:
[ 4.992698] zram: Added device: zram1
[ 4.997595] [] api_io_bm_rt_act_ini+0x7c/0x300 [aim_mil]
[ 5.004540] [] api_io_bm_ini+0xc4/0x190 [aim_mil]
[ 5.012515] [] api_sys_reset+0x738/0x868 [aim_mil]
[ 5.020599] [] api_main_init_and_reset+0x200/0x2b8 [aim_mil]
[ 5.029642] [] mil_hw_initialize_tsw+0x6c/0xa0 [aim_mil]
[ 5.038386] [] aim_pci_mil_init_tsw+0xb0/0x130 [aim_mil]
[ 5.047198] [] aim_pci_device_init_mil+0x80/0x90 [aim_mil]
[ 5.056002] [] aim_pci_probe+0x1f8/0x400 [aim_mil]
[ 5.064077] [] pci_device_probe+0xa4/0x140
[ 5.071426] [] driver_probe_device+0x298/0x448
lspci info
01:00.0 Memory controller: MyDevice Device 4100
Subsystem: MyDevice Device 0011
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 382
Region 0: Memory at 40200000 (64-bit, non-prefetchable) [size=2M]
Region 2: Memory at 40100000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [60] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 unlimited
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s, Exit Latency L0s unlimited, L1 unlimited
ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp-
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range B, TimeoutDis-, LTR-, OBFF Not Supported
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1-
EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
Capabilities: [100 v1] Device Serial Number 00-00-00-01-01-00-0a-35
Kernel driver in use: my_driver
Kernel modules: my_driver