[Nouveau] help with push

[Daniel Melo Jorge da Cunha]

SORRY SORRY SORRY :)
Thanks for the consideration.

2015-11-02 15:42 GMT-03:00 Ilia Mirkin <imirkin at alum.mit.edu>:

> Errrr.... are you sure?
>
> nv30_screen_create starts with a bunch of stuff init'ing objects, and then
> does:
>
>    BEGIN_NV04(push, NV01_SUBC(3D, OBJECT), 1);
>    PUSH_DATA (push, screen->eng3d->handle);
>
> And as you can see in nv30_winsys.h:
>
> static inline void
> BEGIN_NV04(struct nouveau_pushbuf *push, int subc, int mthd, int size)
> {
>    PUSH_SPACE(push, size + 1);
>    PUSH_DATA (push, 0x00000000 | (size << 18) | (subc << 13) | mthd);
> }
>
> and PUSH_SPACE in turn calls nouveau_pushbuf_space.
>
>   -ilia
>
> On Mon, Nov 2, 2015 at 1:36 PM, Daniel Melo Jorge da Cunha
> <dmjcunha at gmail.com> wrote:
> > But at the time the mesa3d file
> > src/gallium/drivers/nouveau/nv30/nv30_screen.c
> > is called and when the various PUSH_DATA begin to be called there is not
> yet
> > a call to nouveau_pushbuf_space. So it would generate a seg fault in
> > push->curr. Again, sorry for the confusion and thanks for the reply.
> > Awaiting
> > for an answer if possible. Thanks in advance.
> >
> > 2015-11-02 14:44 GMT-03:00 Ilia Mirkin <imirkin at alum.mit.edu>:
> >>
> >> See libdrm's pushbuf.c -- iirc push->cur points to a GART-mapped bo.
> >>
> >> http://cgit.freedesktop.org/mesa/drm/tree/nouveau/pushbuf.c#n682
> >>
> >> nouveau_pushbuf_data(push, NULL, 0, 0);
> >> nouveau_bo_ref(bo, &nvpb->bo);
> >> nouveau_bo_ref(NULL, &bo);
> >>
> >> nvpb->bgn = nvpb->bo->map;
> >> nvpb->ptr = nvpb->bgn;
> >> push->cur = nvpb->bgn;
> >> push->end = push->cur + (nvpb->bo->size / 4);
> >> push->end -= 2 + push->rsvd_kick; /* space for suffix */
> >>
> >> Not sure what problem you're trying to solve.
> >>
> >>   -ilia
> >>
> >> On Mon, Nov 2, 2015 at 12:31 PM, Daniel Melo Jorge da Cunha
> >> <dmjcunha at gmail.com> wrote:
> >> > Hi, sorry if I misunderstood everything...
> >> >
> >> > In the file src/gallium/drivers/nouveau/nv30/nv30_screen.c there is
> >> > loans of
> >> > PUSH_DATA which is basically *push->curr = data;
> >> >
> >> > I'm thinking that somehow push->curr is the bo->map = drm_mmap(...)
> >> > that is called in nouveau_bo_map. But I cannot see how they are
> >> > linked...
> >> > Because when nouveau_bo_map calls nouveau_bo_wait
> >> > push = cli_push_get(client, bo) returns NULL...
> >> >
> >> > Is push->curr the region of memory that we send data to the card?
> >> > If so, how is it mapped?
> >> > Has bo->map something to do with it? If so, how are they linked?
> >> >
> >> > _______________________________________________
> >> > Nouveau mailing list
> >> > Nouveau at lists.freedesktop.org
> >> > http://lists.freedesktop.org/mailman/listinfo/nouveau
> >> >
> >
> >
>
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