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From: Ira Weiny <ira.weiny@intel.com>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Christian Koenig <christian.koenig@amd.com>,
	Huang Rui <ray.huang@amd.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
	Max Filippov <jcmvbkbc@gmail.com>,
	Paul Mackerras <paulus@samba.org>,
	"H. Peter Anvin" <hpa@zytor.com>,
	sparclinux@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Helge Deller <deller@gmx.de>, X86 ML <x86@kernel.org>,
	linux-csky@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
	Ingo Molnar <mingo@redhat.com>,
	arcml <linux-snps-arc@lists.infradead.org>,
	linux-xtensa@linux-xtensa.org, Borislav Petkov <bp@alien8.de>,
	Andy Lutomirski <luto@kernel.org>,
	Dan Williams <dan.j.williams@intel.com>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Chris Zankel <chris@zankel.net>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	linux-parisc@vger.kernel.org, linux-mips@vger.kernel.org,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
	"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH V2 11/11] drm: Remove drm specific kmap_atomic code
Date: Mon, 4 May 2020 13:24:47 -0700
Message-ID: <20200504202446.GA985727@iweiny-DESK2.sc.intel.com> (raw)
In-Reply-To: <CAKMK7uF4fd3upBYSQEzs==Nx7osn=wZPnxoKLKm9HTxwU_sZ+w@mail.gmail.com>

On Mon, May 04, 2020 at 01:18:51PM +0200, Daniel Vetter wrote:
> On Mon, May 4, 2020 at 3:09 AM <ira.weiny@intel.com> wrote:
> >
> > From: Ira Weiny <ira.weiny@intel.com>
> >
> > kmap_atomic_prot() is now exported by all architectures.  Use this
> > function rather than open coding a driver specific kmap_atomic.
> >
> > Reviewed-by: Christian König <christian.koenig@amd.com>
> > Reviewed-by: Christoph Hellwig <hch@lst.de>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> 
> I'm assuming this lands through some other tree or a topic branch or whatever.

Yes I think Andrew queued this up before and so I hope he will continue to do
so with the subsequent versions.

Andrew, LMK if this is an issue.

Thanks,
Ira

> 
> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> 
> Cheers, Daniel
> 
> > ---
> >  drivers/gpu/drm/ttm/ttm_bo_util.c    | 56 ++--------------------------
> >  drivers/gpu/drm/vmwgfx/vmwgfx_blit.c | 16 ++++----
> >  include/drm/ttm/ttm_bo_api.h         |  4 --
> >  3 files changed, 12 insertions(+), 64 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
> > index 52d2b71f1588..f09b096ba4fd 100644
> > --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
> > +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
> > @@ -257,54 +257,6 @@ static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
> >         return 0;
> >  }
> >
> > -#ifdef CONFIG_X86
> > -#define __ttm_kmap_atomic_prot(__page, __prot) kmap_atomic_prot(__page, __prot)
> > -#define __ttm_kunmap_atomic(__addr) kunmap_atomic(__addr)
> > -#else
> > -#define __ttm_kmap_atomic_prot(__page, __prot) vmap(&__page, 1, 0,  __prot)
> > -#define __ttm_kunmap_atomic(__addr) vunmap(__addr)
> > -#endif
> > -
> > -
> > -/**
> > - * ttm_kmap_atomic_prot - Efficient kernel map of a single page with
> > - * specified page protection.
> > - *
> > - * @page: The page to map.
> > - * @prot: The page protection.
> > - *
> > - * This function maps a TTM page using the kmap_atomic api if available,
> > - * otherwise falls back to vmap. The user must make sure that the
> > - * specified page does not have an aliased mapping with a different caching
> > - * policy unless the architecture explicitly allows it. Also mapping and
> > - * unmapping using this api must be correctly nested. Unmapping should
> > - * occur in the reverse order of mapping.
> > - */
> > -void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot)
> > -{
> > -       if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
> > -               return kmap_atomic(page);
> > -       else
> > -               return __ttm_kmap_atomic_prot(page, prot);
> > -}
> > -EXPORT_SYMBOL(ttm_kmap_atomic_prot);
> > -
> > -/**
> > - * ttm_kunmap_atomic_prot - Unmap a page that was mapped using
> > - * ttm_kmap_atomic_prot.
> > - *
> > - * @addr: The virtual address from the map.
> > - * @prot: The page protection.
> > - */
> > -void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot)
> > -{
> > -       if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
> > -               kunmap_atomic(addr);
> > -       else
> > -               __ttm_kunmap_atomic(addr);
> > -}
> > -EXPORT_SYMBOL(ttm_kunmap_atomic_prot);
> > -
> >  static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
> >                                 unsigned long page,
> >                                 pgprot_t prot)
> > @@ -316,13 +268,13 @@ static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
> >                 return -ENOMEM;
> >
> >         src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
> > -       dst = ttm_kmap_atomic_prot(d, prot);
> > +       dst = kmap_atomic_prot(d, prot);
> >         if (!dst)
> >                 return -ENOMEM;
> >
> >         memcpy_fromio(dst, src, PAGE_SIZE);
> >
> > -       ttm_kunmap_atomic_prot(dst, prot);
> > +       kunmap_atomic(dst);
> >
> >         return 0;
> >  }
> > @@ -338,13 +290,13 @@ static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
> >                 return -ENOMEM;
> >
> >         dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
> > -       src = ttm_kmap_atomic_prot(s, prot);
> > +       src = kmap_atomic_prot(s, prot);
> >         if (!src)
> >                 return -ENOMEM;
> >
> >         memcpy_toio(dst, src, PAGE_SIZE);
> >
> > -       ttm_kunmap_atomic_prot(src, prot);
> > +       kunmap_atomic(src);
> >
> >         return 0;
> >  }
> > diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c b/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c
> > index bb46ca0c458f..94d456a1d1a9 100644
> > --- a/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c
> > +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c
> > @@ -374,12 +374,12 @@ static int vmw_bo_cpu_blit_line(struct vmw_bo_blit_line_data *d,
> >                 copy_size = min_t(u32, copy_size, PAGE_SIZE - src_page_offset);
> >
> >                 if (unmap_src) {
> > -                       ttm_kunmap_atomic_prot(d->src_addr, d->src_prot);
> > +                       kunmap_atomic(d->src_addr);
> >                         d->src_addr = NULL;
> >                 }
> >
> >                 if (unmap_dst) {
> > -                       ttm_kunmap_atomic_prot(d->dst_addr, d->dst_prot);
> > +                       kunmap_atomic(d->dst_addr);
> >                         d->dst_addr = NULL;
> >                 }
> >
> > @@ -388,8 +388,8 @@ static int vmw_bo_cpu_blit_line(struct vmw_bo_blit_line_data *d,
> >                                 return -EINVAL;
> >
> >                         d->dst_addr =
> > -                               ttm_kmap_atomic_prot(d->dst_pages[dst_page],
> > -                                                    d->dst_prot);
> > +                               kmap_atomic_prot(d->dst_pages[dst_page],
> > +                                                d->dst_prot);
> >                         if (!d->dst_addr)
> >                                 return -ENOMEM;
> >
> > @@ -401,8 +401,8 @@ static int vmw_bo_cpu_blit_line(struct vmw_bo_blit_line_data *d,
> >                                 return -EINVAL;
> >
> >                         d->src_addr =
> > -                               ttm_kmap_atomic_prot(d->src_pages[src_page],
> > -                                                    d->src_prot);
> > +                               kmap_atomic_prot(d->src_pages[src_page],
> > +                                                d->src_prot);
> >                         if (!d->src_addr)
> >                                 return -ENOMEM;
> >
> > @@ -499,9 +499,9 @@ int vmw_bo_cpu_blit(struct ttm_buffer_object *dst,
> >         }
> >  out:
> >         if (d.src_addr)
> > -               ttm_kunmap_atomic_prot(d.src_addr, d.src_prot);
> > +               kunmap_atomic(d.src_addr);
> >         if (d.dst_addr)
> > -               ttm_kunmap_atomic_prot(d.dst_addr, d.dst_prot);
> > +               kunmap_atomic(d.dst_addr);
> >
> >         return ret;
> >  }
> > diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
> > index 0a9d042e075a..de1ccdcd5703 100644
> > --- a/include/drm/ttm/ttm_bo_api.h
> > +++ b/include/drm/ttm/ttm_bo_api.h
> > @@ -668,10 +668,6 @@ int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
> >  int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
> >                 struct ttm_bo_device *bdev);
> >
> > -void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot);
> > -
> > -void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot);
> > -
> >  /**
> >   * ttm_bo_io
> >   *
> > --
> > 2.25.1
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch

  reply index

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-04  1:09 [PATCH V2 00/11] Subject: Remove duplicated kmap code ira.weiny
2020-05-04  1:09 ` [PATCH V2 01/11] arch/kmap: Remove BUG_ON() ira.weiny
2020-05-04  1:09 ` [PATCH V2 02/11] arch/xtensa: Move kmap build bug out of the way ira.weiny
2020-05-04  1:09 ` [PATCH V2 03/11] arch/kmap: Remove redundant arch specific kmaps ira.weiny
2020-05-04  1:09 ` [PATCH V2 04/11] arch/kunmap: Remove duplicate kunmap implementations ira.weiny
2020-05-04  1:09 ` [PATCH V2 05/11] {x86,powerpc,microblaze}/kmap: Move preempt disable ira.weiny
2020-05-06  6:11   ` Christoph Hellwig
2020-05-06 20:25     ` Ira Weiny
2020-05-04  1:09 ` [PATCH V2 06/11] arch/kmap_atomic: Consolidate duplicate code ira.weiny
2020-05-06  6:12   ` Christoph Hellwig
2020-05-04  1:09 ` [PATCH V2 07/11] arch/kunmap_atomic: " ira.weiny
2020-05-06  6:12   ` Christoph Hellwig
2020-05-04  1:09 ` [PATCH V2 08/11] arch/kmap: Ensure kmap_prot visibility ira.weiny
2020-05-06  6:13   ` Christoph Hellwig
2020-05-06 20:33     ` Ira Weiny
2020-05-07  4:56   ` Christoph Hellwig
2020-05-04  1:09 ` [PATCH V2 09/11] arch/kmap: Don't hard code kmap_prot values ira.weiny
2020-05-04  1:09 ` [PATCH V2 10/11] arch/kmap: Define kmap_atomic_prot() for all arch's ira.weiny
2020-05-06  6:14   ` Christoph Hellwig
2020-05-04  1:09 ` [PATCH V2 11/11] drm: Remove drm specific kmap_atomic code ira.weiny
2020-05-04 11:18   ` Daniel Vetter
2020-05-04 20:24     ` Ira Weiny [this message]
2020-05-04  1:35 ` [PATCH V2 00/11] Subject: Remove duplicated kmap code Al Viro
2020-05-04  5:04   ` Ira Weiny
2020-05-04  5:33     ` Al Viro
2020-05-04 20:17       ` Ira Weiny
2020-05-04 21:02         ` Al Viro
2020-05-04 23:27           ` Ira Weiny

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