To do framebuffer updates, one needs memcpy from system memory and a
pointer-increment function. Add both interfaces with documentation.
Signed-off-by: Thomas Zimmermann
---
include/linux/dma-buf-map.h | 72 +++--
1 file changed, 62 insertions(+), 10 deletions(-)
The new functions ttm_bo_{vmap,vunmap}() map and unmap a TTM BO in kernel
address space. The mapping's address is returned as struct dma_buf_map.
Each function is a simplified version of TTM's existing kmap code. Both
functions respect the memory's location ani/or writecombine flags.
On top TTM's
The functions exynos_drm_gem_prime_{vmap,vunmap}() are empty. Remove
them before changing the interface to use struct drm_buf_map. As a side
effect of removing drm_gem_prime_vmap(), the error code changes from
ENOMEM to EOPNOTSUPP.
Signed-off-by: Thomas Zimmermann
---
drivers/gpu/drm/exynos/exyn
Am 15.10.20 um 14:38 schrieb Thomas Zimmermann:
The new functions ttm_bo_{vmap,vunmap}() map and unmap a TTM BO in kernel
address space. The mapping's address is returned as struct dma_buf_map.
Each function is a simplified version of TTM's existing kmap code. Both
functions respect the memory's
The function etnaviv_gem_prime_vunmap() is empty. Remove it before
changing the interface to use struct drm_buf_map.
Signed-off-by: Thomas Zimmermann
---
drivers/gpu/drm/etnaviv/etnaviv_drv.h | 1 -
drivers/gpu/drm/etnaviv/etnaviv_gem.c | 1 -
drivers/gpu/drm/etnaviv/etnaviv_gem_prim
Hi
On Thu, 15 Oct 2020 18:49:09 +0200 Daniel Vetter wrote:
> On Thu, Oct 15, 2020 at 04:08:13PM +0200, Christian König wrote:
> > Am 15.10.20 um 14:38 schrieb Thomas Zimmermann:
> > > The new functions ttm_bo_{vmap,vunmap}() map and unmap a TTM BO in
> > > kernel address space. The mapping's add
Kernel DRM clients now store their framebuffer address in an instance
of struct dma_buf_map. Depending on the buffer's location, the address
refers to system or I/O memory.
Callers of drm_client_buffer_vmap() receive a copy of the value in
the call's supplied arguments. It can be accessed and modi
Am 15.10.20 um 14:37 schrieb Thomas Zimmermann:
The function drm_gem_cma_prime_vunmap() is empty. Remove it before
changing the interface to use struct drm_buf_map.
Signed-off-by: Thomas Zimmermann
Reviewed-by: Christian König
---
drivers/gpu/drm/drm_gem_cma_helper.c | 17 ---
This patch replaces the vmap/vunmap's use of raw pointers in GEM object
functions with instances of struct dma_buf_map. GEM backends are
converted as well. For most of them, this simply changes the returned type.
TTM-based drivers now return information about the location of the memory,
either sys
Am 15.10.20 um 14:37 schrieb Thomas Zimmermann:
The function etnaviv_gem_prime_vunmap() is empty. Remove it before
changing the interface to use struct drm_buf_map.
Signed-off-by: Thomas Zimmermann
Acked-by: Christian König
---
drivers/gpu/drm/etnaviv/etnaviv_drv.h | 1 -
drivers/
On Thu, Oct 15, 2020 at 04:08:13PM +0200, Christian König wrote:
> Am 15.10.20 um 14:38 schrieb Thomas Zimmermann:
> > The new functions ttm_bo_{vmap,vunmap}() map and unmap a TTM BO in kernel
> > address space. The mapping's address is returned as struct dma_buf_map.
> > Each function is a simplif
Hi
On Thu, 15 Oct 2020 16:08:13 +0200 Christian König
wrote:
> Am 15.10.20 um 14:38 schrieb Thomas Zimmermann:
> > The new functions ttm_bo_{vmap,vunmap}() map and unmap a TTM BO in kernel
> > address space. The mapping's address is returned as struct dma_buf_map.
> > Each function is a simplifi
The function drm_gem_cma_prime_vunmap() is empty. Remove it before
changing the interface to use struct drm_buf_map.
Signed-off-by: Thomas Zimmermann
---
drivers/gpu/drm/drm_gem_cma_helper.c | 17 -
drivers/gpu/drm/vc4/vc4_bo.c | 1 -
include/drm/drm_gem_cma_helper.h
At least sparc64 requires I/O-specific access to framebuffers. This
patch updates the fbdev console accordingly.
For drivers with direct access to the framebuffer memory, the callback
functions in struct fb_ops test for the type of memory and call the rsp
fb_sys_ of fb_cfb_ functions.
For drivers
Am 15.10.20 um 14:37 schrieb Thomas Zimmermann:
The parameters map and is_iomem are always of the same value. Removed them
to prepares the function for conversion to struct dma_buf_map.
v4:
* don't check for !kmap->virtual; will always be false
Signed-off-by: Thomas Zimmermann
Reviewed
Am 15.10.20 um 14:38 schrieb Thomas Zimmermann:
The functions exynos_drm_gem_prime_{vmap,vunmap}() are empty. Remove
them before changing the interface to use struct drm_buf_map. As a side
effect of removing drm_gem_prime_vmap(), the error code changes from
ENOMEM to EOPNOTSUPP.
Signed-off-by: T
The parameters map and is_iomem are always of the same value. Removed them
to prepares the function for conversion to struct dma_buf_map.
v4:
* don't check for !kmap->virtual; will always be false
Signed-off-by: Thomas Zimmermann
Reviewed-by: Daniel Vetter
---
drivers/gpu/drm/drm_gem_v
DRM's fbdev console uses regular load and store operations to update
framebuffer memory. The bochs driver on sparc64 requires the use of
I/O-specific load and store operations. We have a workaround, but need
a long-term solution to the problem.
This patchset changes GEM's vmap/vunmap interfaces to
GEM's vmap and vunmap interfaces now wrap memory pointers in struct
dma_buf_map.
Signed-off-by: Thomas Zimmermann
Reviewed-by: Daniel Vetter
---
drivers/gpu/drm/drm_client.c | 18 +++---
drivers/gpu/drm/drm_gem.c | 26 +-
drivers/gpu/drm/drm_internal.h
Am 15.10.20 um 14:38 schrieb Thomas Zimmermann:
This patch replaces the vmap/vunmap's use of raw pointers in GEM object
functions with instances of struct dma_buf_map. GEM backends are
converted as well. For most of them, this simply changes the returned type.
TTM-based drivers now return inform
On Thu, Oct 15, 2020 at 6:32 PM Karol Herbst wrote:
>
> Ben, I think this is like the 5th patch tackling this issue, I think
> we should merge one of those.
>
maybe I just confused that with reports, but it seems to turn up quite
a bit and maybe I should have pushed more of it as well...
Anyway,
Ben, I think this is like the 5th patch tackling this issue, I think
we should merge one of those.
On Thu, Oct 15, 2020 at 6:23 AM Keita Suzuki
wrote:
>
> struct pw_rail_t is allocated as an array in function nvios_iccsense_parse,
> and stored to a struct member of local variable. However, the ar
On Mon, Oct 12, 2020 at 02:14:07PM -0700, Dan Williams wrote:
> > ZONE_DEVICE struct pages have an extra reference count that complicates the
> > code for put_page() and several places in the kernel that need to check the
> > reference count to see that a page is not being used (gup, compaction,
>
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