search for: c000e6e0

...0) (nouveau_gem_ioctl_cpu_prep) from [<c02aaa84>] (drm_ioctl+0x1d8/0x4f4) (drm_ioctl) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO mapped through the BAR. Any idea about the origin of this behavior? Does ARM forbid cached mappings over IO regions? Signed-off-by: Alexandre Courbot <acourbot at nvidia.com> --- drivers/...

...[<c02aaa84>] (drm_ioctl+0x1d8/0x4f4) >> (drm_ioctl) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) >> (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) >> (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) >> (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 >> >> The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO >> mapped through the BAR. >> > Um wait, this memory is behind an already mapped bar? I think ioremap on > ARM defaults to uncached mappings, so if you want to a...

.../0x4f4) >> >> (drm_ioctl) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) >> >> (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) >> >> (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) >> >> (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 >> >> >> >> The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO >> >> mapped through the BAR. >> >> >> > Um wait, this memory is behind an already mapped bar? I think ioremap on >> >...

...> (drm_ioctl) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) >>>>>> (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) >>>>>> (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) >>>>>> (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 >>>>>> >>>>>> The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO >>>>>> mapped through the BAR. >>>>>> >>>>> Um wait, this memory is behind an already mapped bar...

...l_cpu_prep) from [<c02aaa84>] (drm_ioctl+0x1d8/0x4f4) > (drm_ioctl) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) > (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) > (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) > (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 > > The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO > mapped through the BAR. > Um wait, this memory is behind an already mapped bar? I think ioremap on ARM defaults to uncached mappings, so if you want to access the memory behind...

...(drm_ioctl+0x1d8/0x4f4) > >> (drm_ioctl) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) > >> (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) > >> (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) > >> (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 > >> > >> The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO > >> mapped through the BAR. > >> > > Um wait, this memory is behind an already mapped bar? I think ioremap on > > ARM defaults to uncached...

...; >> (drm_ioctl) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) > >> >> (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) > >> >> (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) > >> >> (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 > >> >> > >> >> The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO > >> >> mapped through the BAR. > >> >> > >> > Um wait, this memory is behind an already mapped bar? I think...

...) from [<c0355394>] (nouveau_drm_ioctl+0x54/0x80) > >>>>>> (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) > >>>>>> (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) > >>>>>> (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 > >>>>>> > >>>>>> The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO > >>>>>> mapped through the BAR. > >>>>>> > >>>>> Um wait, this memory is beh...

...lt;c0355394>] (nouveau_drm_ioctl+0x54/0x80) >>>>>>>> (nouveau_drm_ioctl) from [<c00ee7b0>] (do_vfs_ioctl+0x3dc/0x5a0) >>>>>>>> (do_vfs_ioctl) from [<c00ee9a8>] (SyS_ioctl+0x34/0x5c) >>>>>>>> (SyS_ioctl) from [<c000e6e0>] (ret_fast_syscall+0x0/0x30 >>>>>>>> >>>>>>>> The offending nouveau_bo_rd32 is done over an IO-mapped BO, e.g. a BO >>>>>>>> mapped through the BAR. >>>>>>>> >>>>>>> Um wait, thi...