Re: [Xen-devel] [PATCH v1 09/47] vidoe: fbdev: atyfb: remove and fix MTRR MMIO "hole" work around

[Ville Syrjälä <syrjala@xxxxxx>]

On Sat, Mar 21, 2015 at 11:15:14AM +0200, Ville Syrjälä wrote:
> On Fri, Mar 20, 2015 at 04:17:59PM -0700, Luis R. Rodriguez wrote:
> > diff --git a/drivers/video/fbdev/aty/atyfb_base.c 
> > b/drivers/video/fbdev/aty/atyfb_base.c
> > index 8025624..8875e56 100644
> > --- a/drivers/video/fbdev/aty/atyfb_base.c
> > +++ b/drivers/video/fbdev/aty/atyfb_base.c
> > @@ -2630,21 +2630,10 @@ static int aty_init(struct fb_info *info)
> >  
> >  #ifdef CONFIG_MTRR
> >     par->mtrr_aper = -1;
> > -   par->mtrr_reg = -1;
> >     if (!nomtrr) {
> > -           /* Cover the whole resource. */
> > -           par->mtrr_aper = mtrr_add(par->res_start, par->res_size,
> > +           par->mtrr_aper = mtrr_add(info->fix.smem_start,
> > +                                     info->fix.smem_len,
> >                                       MTRR_TYPE_WRCOMB, 1);
> 
> MTRRs need power of two size, so how is this supposed to work?

Still waiting for an answer...

> 
> > -           if (par->mtrr_aper >= 0 && !par->aux_start) {
> > -                   /* Make a hole for mmio. */
> > -                   par->mtrr_reg = mtrr_add(par->res_start + 0x800000 -
> > -                                            GUI_RESERVE, GUI_RESERVE,
> > -                                            MTRR_TYPE_UNCACHABLE, 1);
> > -                   if (par->mtrr_reg < 0) {
> > -                           mtrr_del(par->mtrr_aper, 0, 0);
> > -                           par->mtrr_aper = -1;
> > -                   }
> > -           }
> >     }
> >  #endif
> >  
> > @@ -2776,10 +2765,6 @@ aty_init_exit:
> >     par->pll_ops->set_pll(info, &par->saved_pll);
> >  
> >  #ifdef CONFIG_MTRR
> > -   if (par->mtrr_reg >= 0) {
> > -           mtrr_del(par->mtrr_reg, 0, 0);
> > -           par->mtrr_reg = -1;
> > -   }
> >     if (par->mtrr_aper >= 0) {
> >             mtrr_del(par->mtrr_aper, 0, 0);
> >             par->mtrr_aper = -1;
> > @@ -3466,7 +3451,7 @@ static int atyfb_setup_generic(struct pci_dev *pdev, 
> > struct fb_info *info,
> >     }
> >  
> >     info->fix.mmio_start = raddr;
> > -   par->ati_regbase = ioremap(info->fix.mmio_start, 0x1000);
> > +   par->ati_regbase = ioremap_nocache(info->fix.mmio_start, 0x1000);
> >     if (par->ati_regbase == NULL)
> >             return -ENOMEM;
> >  
> > @@ -3491,6 +3476,8 @@ static int atyfb_setup_generic(struct pci_dev *pdev, 
> > struct fb_info *info,
> >     info->fix.smem_start = addr;
> >     info->fix.smem_len = 0x800000;
> >  
> > +   aty_fudge_framebuffer_len(info);
> > +
> >     info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
> >     if (info->screen_base == NULL) {
> >             ret = -ENOMEM;
> > @@ -3563,6 +3550,7 @@ static int atyfb_pci_probe(struct pci_dev *pdev,
> >             return -ENOMEM;
> >     }
> >     par = info->par;
> > +   par->bus_type = PCI;
> >     info->fix = atyfb_fix;
> >     info->device = &pdev->dev;
> >     par->pci_id = pdev->device;
> > @@ -3732,10 +3720,6 @@ static void atyfb_remove(struct fb_info *info)
> >  #endif
> >  
> >  #ifdef CONFIG_MTRR
> > -   if (par->mtrr_reg >= 0) {
> > -           mtrr_del(par->mtrr_reg, 0, 0);
> > -           par->mtrr_reg = -1;
> > -   }
> >     if (par->mtrr_aper >= 0) {
> >             mtrr_del(par->mtrr_aper, 0, 0);
> >             par->mtrr_aper = -1;
> > -- 
> > 2.3.2.209.gd67f9d5.dirty
> > 
> > --
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> 
> -- 
> Ville Syrjälä
> syrjala@xxxxxx
> http://www.sci.fi/~syrjala/

-- 
Ville Syrjälä
syrjala@xxxxxx
http://www.sci.fi/~syrjala/

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