linux-kernel - Re: [PATCH libdrm] headers: Sync with drm-next

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Message-ID: <CAF6AEGvUsWF+_dZzGBM1BYnwvZRY9T0P7OGq30KJLohFU3soKg@mail.gmail.com>
Date:   Wed, 10 Apr 2019 21:49:33 -0400
From:   Rob Clark <robdclark@...il.com>
To:     Eric Engestrom <eric.engestrom@...el.com>
Cc:     Ayan Halder <Ayan.Halder@....com>,
        Liviu Dudau <Liviu.Dudau@....com>,
        Brian Starkey <Brian.Starkey@....com>,
        "malidp@...s.arm.com" <malidp@...s.arm.com>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
        "sean@...rly.run" <sean@...rly.run>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "robdclark@...il.com" <robdclark@...il.com>,
        "jani.nikula@...ux.intel.com" <jani.nikula@...ux.intel.com>,
        "joonas.lahtinen@...ux.intel.com" <joonas.lahtinen@...ux.intel.com>,
        "rodrigo.vivi@...el.com" <rodrigo.vivi@...el.com>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "freedreno@...ts.freedesktop.org" <freedreno@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        nd <nd@....com>
Subject: Re: [PATCH libdrm] headers: Sync with drm-next

On Tue, Apr 9, 2019 at 8:27 AM Eric Engestrom <eric.engestrom@...el.com> wrote:
>
> On Tuesday, 2019-04-09 12:59:13 +0100, Eric Engestrom wrote:
> > On Tuesday, 2019-04-09 11:35:14 +0000, Ayan Halder wrote:
> > > Generated using make headers_install from the drm-next
> > > tree - git://anongit.freedesktop.org/drm/drm
> > > branch - drm-next
> > > commit - 14d2bd53a47a7e1cb3e03d00a6b952734cf90f3f
> > >
> > > The changes were as follows :-
> > >
> > > core: (drm.h, drm_fourcc.h, drm_mode.h)
> > > - Added 'struct drm_syncobj_transfer', 'struct drm_syncobj_timeline_wait' and 'struct drm_syncobj_timeline_array'
> > > - Added various DRM_IOCTL_SYNCOBJ_ ioctls
> > > - Added some new RGB and YUV formats
> > > - Added 'DRM_FORMAT_MOD_VENDOR_ALLWINNER'
> > > - Added 'SAMSUNG' and Arm's 'AFBC' and 'ALLWINNER' format modifiers
> > > - Added 'struct drm_mode_rect'
> > >
> > > i915:
> > > - Added struct 'struct i915_user_extension' and various 'struct drm_i915_gem_context_'
> > > - Added different modes of per-process Graphics Translation Table
> > >
> > > msm:
> > > - Added various get or set GEM buffer info flags
> > > - Added some MSM_SUBMIT_BO_ macros
> > > - Modified 'struct drm_msm_gem_info'
> > >
> > > Signed-off-by: Ayan Kumar halder <ayan.halder@....com>
> >
> > This looks sane, and applies cleanly :)
> > Acked-by: Eric Engestrom <eric.engestrom@...el.com>
>
> Actually, revoking that, as this patch breaks the build; see below.
>
> >
> > > ---
> > >  include/drm/drm.h        |  36 +++++++
> > >  include/drm/drm_fourcc.h | 136 +++++++++++++++++++++++++++
> > >  include/drm/drm_mode.h   |  23 ++++-
> > >  include/drm/i915_drm.h   | 237 ++++++++++++++++++++++++++++++++++++++++-------
> > >  include/drm/msm_drm.h    |  25 +++--
> > >  5 files changed, 415 insertions(+), 42 deletions(-)
> > >
> [snip]
> > > diff --git a/include/drm/msm_drm.h b/include/drm/msm_drm.h
> > > index c06d0a5..91a16b3 100644
> > > --- a/include/drm/msm_drm.h
> > > +++ b/include/drm/msm_drm.h
> > > @@ -105,14 +105,24 @@ struct drm_msm_gem_new {
> > >     __u32 handle;         /* out */
> > >  };
> > >
> > > -#define MSM_INFO_IOVA      0x01
> > > -
> > > -#define MSM_INFO_FLAGS (MSM_INFO_IOVA)
> > > +/* Get or set GEM buffer info.  The requested value can be passed
> > > + * directly in 'value', or for data larger than 64b 'value' is a
> > > + * pointer to userspace buffer, with 'len' specifying the number of
> > > + * bytes copied into that buffer.  For info returned by pointer,
> > > + * calling the GEM_INFO ioctl with null 'value' will return the
> > > + * required buffer size in 'len'
> > > + */
> > > +#define MSM_INFO_GET_OFFSET        0x00   /* get mmap() offset, returned by value */
> > > +#define MSM_INFO_GET_IOVA  0x01   /* get iova, returned by value */
> > > +#define MSM_INFO_SET_NAME  0x02   /* set the debug name (by pointer) */
> > > +#define MSM_INFO_GET_NAME  0x03   /* get debug name, returned by pointer */
> > >
> > >  struct drm_msm_gem_info {
> > >     __u32 handle;         /* in */
> > > -   __u32 flags;          /* in - combination of MSM_INFO_* flags */
> > > -   __u64 offset;         /* out, mmap() offset or iova */
> > > +   __u32 info;           /* in - one of MSM_INFO_* */
> > > +   __u64 value;          /* in or out */
> > > +   __u32 len;            /* in or out */
> > > +   __u32 pad;
>
> freedreno/msm/msm_bo.c needs to be updated to reflect those changes.


I think you can just rename flags->info and offset->value, the rest of
the struct should be zero-initialized.. if in doubt you can check
$mesa/src/freedreno/drm/msm_bo.c

side-note:  the libdrm_freedreno code was folded into mesa in 19.0, so
at *some* point we can probably disable libdrm_freedreno build by
default.  (I'd kinda still like to keep the code around for some misc
standalone tools I have, but that is the sort of thing where I can fix
libdrm if it gets broken).  When to switch to disabled by default I
guess comes down to how long we want to support mesa 18.x with latest
libdrm??  Maybe after 19.1, since (selfishly motivated) that gives me
a long enough window back in case I find myself needing to bisect for
some regression..

BR,
-R

>
> > >  };
> > >
> > >  #define MSM_PREP_READ        0x01
> > > @@ -188,8 +198,11 @@ struct drm_msm_gem_submit_cmd {
> > >   */
> > >  #define MSM_SUBMIT_BO_READ             0x0001
> > >  #define MSM_SUBMIT_BO_WRITE            0x0002
> > > +#define MSM_SUBMIT_BO_DUMP             0x0004
> > >
> > > -#define MSM_SUBMIT_BO_FLAGS            (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
> > > +#define MSM_SUBMIT_BO_FLAGS            (MSM_SUBMIT_BO_READ | \
> > > +                                   MSM_SUBMIT_BO_WRITE | \
> > > +                                   MSM_SUBMIT_BO_DUMP)
> > >
> > >  struct drm_msm_gem_submit_bo {
> > >     __u32 flags;          /* in, mask of MSM_SUBMIT_BO_x */
> > > --
> > > 2.7.4
> > >