[Bug 93199] IGT: Couldn't map MMIO region

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93199

--- Comment #24 from oskar at cetex.se ---
(In reply to Jari Tahvanainen from comment #23)
> Moving this from DRM/Intel to IGT, since it seems to be problem with that.
> Sean, Jonathan, Dimitry and Rami - please check if this problem is still
> valid with the latest igt.

I've found i have the same issue, running as root:

root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# intel_gpu_top 
(intel_gpu_top:6971) intel-mmio-CRITICAL: Test assertion failure function
intel_mmio_use_pci_bar, file ../../lib/intel_mmio.c:145:
(intel_gpu_top:6971) intel-mmio-CRITICAL: Failed assertion: !(error != 0)
(intel_gpu_top:6971) intel-mmio-CRITICAL: Last errno: 1, Operation not
permitted
(intel_gpu_top:6971) intel-mmio-CRITICAL: Couldn't map MMIO region
Stack trace:
  #0 [_init+0x7369]
  #1 [_init+0x4fd0]
  #2 [_init+0x98e]
  #3 [__libc_start_main+0xf1]
  #4 [_init+0x1752]
  #5 [<unknown>+0x1752]
Test (null) failed.
**** DEBUG ****
(intel_gpu_top:6971) intel-chipset-DEBUG: Test requirement passed: pci_dev
(intel_gpu_top:6971) intel-mmio-CRITICAL: Test assertion failure function
intel_mmio_use_pci_bar, file ../../lib/intel_mmio.c:145:
(intel_gpu_top:6971) intel-mmio-CRITICAL: Failed assertion: !(error != 0)
(intel_gpu_top:6971) intel-mmio-CRITICAL: Last errno: 1, Operation not
permitted
(intel_gpu_top:6971) intel-mmio-CRITICAL: Couldn't map MMIO region
****  END  ****
FAIL (-1.000s)


strace shows failure on opening resource0:
open("/sys/bus/pci/devices/0000:00:02.0/resource", O_RDONLY|O_CLOEXEC) = 4
read(4, "0x00000000e0000000 0x00000000e0f"..., 512) = 512
close(4)                                = 0
open("/sys/bus/pci/devices/0000:00:02.0/resource0", O_RDWR|O_CLOEXEC) = 4
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 4, 0) = -1 EPERM
(Operation not permitted)
close(4)                                = 0
write(2, "(intel_gpu_top:7094) intel-mmio-"..., 131(intel_gpu_top:7094)
intel-mmio-CRITICAL: Test assertion failure function intel_mmio_use_pci_bar,
file ../../lib/intel_mmio.c:145:
) = 131
write(2, "(intel_gpu_top:7094) intel-mmio-"..., 74(intel_gpu_top:7094)
intel-mmio-CRITICAL: Failed assertion: !(error != 0)
) = 74
write(2, "(intel_gpu_top:7094) intel-mmio-"..., 81(intel_gpu_top:7094)
intel-mmio-CRITICAL: Last errno: 1, Operation not permitted
) = 81
write(2, "(intel_gpu_top:7094) intel-mmio-"..., 67(intel_gpu_top:7094)
intel-mmio-CRITICAL: Couldn't map MMIO region
) = 67

checking if readable with cat:
root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# cat resource
0x00000000e0000000 0x00000000e0ffffff 0x0000000000140204
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x00000000c0000000 0x00000000dfffffff 0x000000000014220c
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x000000000000e000 0x000000000000e03f 0x0000000000040101
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x00000000000c0000 0x00000000000dffff 0x0000000000000212
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 0x0000000000000000
root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# cat resource0
cat: resource0: Input/output error
root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# cat resource2
cat: resource2: Input/output error
root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# cat resource2_wc
cat: resource2_wc: Input/output error
root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# cat resource4
cat: resource4: Invalid argument

root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# ls -la resource*
-r--r--r-- 1 root root      4096 okt  2 22:38 resource
-rw------- 1 root root  16777216 okt  2 22:30 resource0
-rw------- 1 root root 536870912 okt  2 22:38 resource2
-rw------- 1 root root 536870912 okt  2 22:38 resource2_wc
-rw------- 1 root root        64 okt  2 22:38 resource4

root at oskar-ThinkPad-X270:/sys/bus/pci/devices/0000:00:02.0# uname -a
Linux oskar-ThinkPad-X270 4.10.0-35-generic #39-Ubuntu SMP Wed Sep 13 07:46:59
UTC 2017 x86_64 x86_64 x86_64 GNU/Linux


I wonder if it could be related to secure_boot?

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