DRM removal soon - crash with PAE kernel

[Yoshihiro Ota]

Hi Cy and all,

I've been using drm-kmod okay on FreeBSD 12.0-RELEASE i386 GENERIC based kernel with multiple machines since the last post.

I switched to use PAE kernel (12.0-RELEASE) on one of machines and then this module started panicing kernel.
  Given addressing is different, this crash isn't something surprise to see, though...

Hiro

On Thu, 28 Feb 2019 22:45:29 -0800
Cy Schubert <Cy.Schubert at cschubert.com> wrote:

> In message <20190301005009.4457f46f10c3a8229b5dd7fc at j.email.ne.jp>, 
> Yoshihiro O
> ta writes:
> > Hi, all and Cy.
> >
> > I trimmed most of old posts.
> >
> > On Thu, 28 Feb 2019 11:22:52 -0800
> > Cy Schubert <Cy.Schubert at cschubert.com> wrote:
> > > 
> > > Yes. drm-legacy-kmod should be removed from ports sooner than later. drm-cu
> > rrent-kind works
> > > perfectly on older gear like my 13 year old Pentium-M, which was repurposed
> >  as an i386 test
> > > platform years ago.
> >
> > Don't worry.
> > You are still talking in the unit of years.
> > I still occasionally use a laptop from the last century. :)
> > Jokes aside, I have 2 questions.
> >
> > I have a 12.0-RELEASE base system and 12.0 pkg configuration.
> > Looking back my operational log, pkg install was like this.
> >
> > # pkg install drm-kmod
> > Updating FreeBSD repository catalogue...
> > FreeBSD repository is up to date.
> > All repositories are up to date.
> > The following 3 package(s) will be affected (of 0 checked):
> >
> > New packages to be INSTALLED:
> >         drm-kmod: g20180930
> >         drm-legacy-kmod: g20181031_1
> >         gpu-firmware-kmod: g20180825
> >
> > Question #1:
> > drm-current-kmod was mentioned in your reply.  Have I installed wrong kmod?
> 
> The drm-kmod meta-port installs the correct drm-*-kmod for you. It 
> appears the package installed the legacy kmod. If you want to install 
> drm-current-kmod or drm-fbsd12.0-kmod you'd need to specify either 
> instead of drm-kmod.
> 
> Does it work? If it works, stay with it.
> 
> >
> >
> > I do not setup X to come up as a part of boot process.  So, I login via conso
> > le and may stay there or decide to startx depending on what I want to do.  I 
> > can see the driver switching and my kld_list="/boot/modules/radeonkms.ko" loa
> > ds these modules as expected.
> 
> X loads the correct kernel modules for you. I don't pre-load any drm 
> modules. I let X handle everything for me. Yours does as well. It 
> simply works.
> 
> >
> > On the other hand, I still see the following in dmesg.
> >
> > drmn0: =======================================================
> > drmn0: This code is obsolete abandonware. Install the graphics/drm-legacy-kmo
> > d p
> > kg
> > drmn0: =======================================================
> > drmn0: Deprecated code (to be removed in FreeBSD 13): drm2 drivers
> > drmn0: =======================================================
> > drmn0: This code is obsolete abandonware. Install the graphics/drm-legacy-kmo
> > d pkg
> > drmn0: =======================================================
> > drmn0: Deprecated code (to be removed in FreeBSD 13): drm2 drivers
> > drmn0: <Wrestler [Radeon HD 6320]> on vgapci0
> > info: [drm] RADEON_IS_PCIE
> > info: [drm] initializing kernel modesetting (PALM 0x1002:0x9806 0x144D:0xC589
> > ).
> > info: [drm] register mmio base: 0xFEB00000
> > info: [drm] register mmio size: 262144
> > info: [drm] radeon_atrm_get_bios: ===> Try ATRM...
> 
> The deprecated DRM2 was removed from current after 12 was branched. You 
> could alter the module_path kenv environment variable to put 
> /boot/modules before /boot/kernel, but frankly don't mess with it if it 
> works.
> 
> >
> > kldstat -v reports this:
> >
> >  5    1 0x1900d000   10c000 radeonkms.ko (/boot/modules/radeonkms.ko)
> >         Contains modules:
> >                  Id Name
> >                 529 vgapci/radeonkms
> >                 534 drmn/radeon_atom_hw_i2c
> >                 531 radeon_iicbb/iicbb
> >                 533 radeon_hw_i2c/iicbus
> >                 530 drmn/radeon_iicbb
> >                 532 drm/radeon_hw_i2c
> >  6    1 0x19119000    4e000 drm2.ko (/boot/kernel/drm2.ko)
> >         Contains modules:
> >                  Id Name
> >                 525 drmn/drm_iic_dp_aux
> >                 526 drmn
> >
> > Question #2.
> > Am I loading the right driver set?
> 
> In your case installing the package is a NOP because the base drm is 
> loaded because it's first in the kld search path. If X works, then 
> don't worry about it.
> 
> 
> -- 
> Cheers,
> Cy Schubert <Cy.Schubert at cschubert.com>
> FreeBSD UNIX:  <cy at FreeBSD.org>   Web:  http://www.FreeBSD.org
> 
> 	The need of the many outweighs the greed of the few.
> 
> 
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