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From: "Dixit, Ashutosh" <ashutosh.dixit@intel.com>
To: Matthew Auld <matthew.auld@intel.com>
Cc: <igt-dev@lists.freedesktop.org>,
	<intel-gfx@lists.freedesktop.org>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Daniel Vetter <daniel.vetter@ffwll.ch>,
	 Ramalingam C <ramalingam.c@intel.com>
Subject: Re: [Intel-gfx] [PATCH i-g-t v3 03/11] lib/i915/gem_mman: add fixed mode to gem_mmap_offset__cpu
Date: Sun, 01 Aug 2021 23:29:59 -0700	[thread overview]
Message-ID: <87pmuw5pg8.wl-ashutosh.dixit@intel.com> (raw)
In-Reply-To: <20210730085348.2326899-3-matthew.auld@intel.com>

On Fri, 30 Jul 2021 01:53:40 -0700, Matthew Auld wrote:
>
> On discrete we only support the new fixed mode.
>
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Ramalingam C <ramalingam.c@intel.com>
> ---
>  lib/i915/gem_mman.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/lib/i915/gem_mman.c b/lib/i915/gem_mman.c
> index c432bb16..563a7ccf 100644
> --- a/lib/i915/gem_mman.c
> +++ b/lib/i915/gem_mman.c
> @@ -474,8 +474,14 @@ void *gem_mmap__cpu(int fd, uint32_t handle, uint64_t offset, uint64_t size, uns
>  void *__gem_mmap_offset__cpu(int fd, uint32_t handle, uint64_t offset,
>			     uint64_t size, unsigned prot)
>  {
> -	return __gem_mmap_offset(fd, handle, offset, size, prot,
> +	void *ptr;
> +
> +	ptr = __gem_mmap_offset(fd, handle, offset, size, prot,
>				 I915_MMAP_OFFSET_WB);
> +	if (!ptr)
> +		ptr = __gem_mmap_offset__fixed(fd, handle, offset, size, prot);
> +
> +	return ptr;

Imo there's some asymmetry here. If we are adding fixed mode to
mmap__device_coherent (in the previous patch) then we should also be adding
it to mmap__cpu_coherent (as before). Or, if we are adding fixed mode to
__gem_mmap_offset__cpu we should also be adding it to
__gem_mmap_offset__wc. Thanks.

  reply	other threads:[~2021-08-02  6:30 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30  8:53 [Intel-gfx] [PATCH i-g-t v3 01/11] lib/i915/gem_mman: add FIXED mmap mode Matthew Auld
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 02/11] lib/i915/gem_mman: add fixed mode to mmap__device_coherent Matthew Auld
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 03/11] lib/i915/gem_mman: add fixed mode to gem_mmap_offset__cpu Matthew Auld
2021-08-02  6:29   ` Dixit, Ashutosh [this message]
2021-08-06 10:00     ` Maarten Lankhorst
2021-08-06 10:10     ` Maarten Lankhorst
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 04/11] lib/i915/gem_mman: add fixed mode to gem_mmap__cpu Matthew Auld
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 05/11] lib/i915/gem_mman: update mmap_offset_types with FIXED Matthew Auld
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 06/11] lib/ioctl_wrappers: update mmap_{read, write} for discrete Matthew Auld
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 07/11] lib/intel_bufops: " Matthew Auld
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 08/11] lib/ioctl_wrappers: update set_domain " Matthew Auld
2021-08-02  6:24   ` Dixit, Ashutosh
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 09/11] tests/i915/module_load: update " Matthew Auld
2021-08-02  6:25   ` Dixit, Ashutosh
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 10/11] lib/i915/gem_mman: add helper query for has_device_coherent Matthew Auld
2021-07-30  8:53 ` [Intel-gfx] [PATCH i-g-t v3 11/11] tests/i915/gem_exec_fence: use device_coherent mmap Matthew Auld

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