From: Andi Shyti <andi.shyti@linux.intel.com>
To: Ramalingam C <ramalingam.c@intel.com>
Cc: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>,
intel-gfx <intel-gfx@lists.freedesktop.org>,
Hellstrom Thomas <thomas.hellstrom@intel.com>,
Matthew Auld <matthew.auld@intel.com>,
dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: [Intel-gfx] [PATCH 3/4] drm/i915/gtt/xehpsdv: move scratch page to system memory
Date: Wed, 8 Dec 2021 18:11:25 +0200 [thread overview]
Message-ID: <YbDZLbW28G5q0A0h@intel.intel> (raw)
In-Reply-To: <20211208141613.7251-4-ramalingam.c@intel.com>
Hi Ram and Matt,
> On some platforms the hw has dropped support for 4K GTT pages when
> dealing with LMEM, and due to the design of 64K GTT pages in the hw, we
> can only mark the *entire* page-table as operating in 64K GTT mode,
> since the enable bit is still on the pde, and not the pte. And since we
> we still need to allow 4K GTT pages for SMEM objects, we can't have a
> "normal" 4K page-table with scratch pointing to LMEM, since that's
> undefined from the hw pov. The simplest solution is to just move the 64K
> scratch page to SMEM on such platforms and call it a day, since that
> should work for all configurations.
>
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> Reviewed-by: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Andi
next prev parent reply other threads:[~2021-12-08 16:11 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-08 14:16 [Intel-gfx] [PATCH 0/4] drm/i915: Basic enabling of 64k page support Ramalingam C
2021-12-08 14:16 ` Ramalingam C
2021-12-08 14:16 ` [Intel-gfx] [PATCH 1/4] drm/i915: Add has_64k_pages flag Ramalingam C
2021-12-08 14:16 ` Ramalingam C
2021-12-08 16:08 ` [Intel-gfx] " Andi Shyti
2021-12-08 14:16 ` [Intel-gfx] [PATCH 2/4] drm/i915/xehpsdv: set min page-size to 64K Ramalingam C
2021-12-08 14:16 ` Ramalingam C
2021-12-08 14:34 ` [Intel-gfx] " Matthew Auld
2021-12-08 14:34 ` Matthew Auld
2021-12-08 15:10 ` [Intel-gfx] " Thomas Hellström
2021-12-08 15:10 ` Thomas Hellström
2021-12-08 15:48 ` [Intel-gfx] " Ramalingam C
2021-12-08 15:48 ` Ramalingam C
2021-12-08 16:09 ` [Intel-gfx] " Andi Shyti
2021-12-08 14:16 ` [Intel-gfx] [PATCH 3/4] drm/i915/gtt/xehpsdv: move scratch page to system memory Ramalingam C
2021-12-08 14:16 ` Ramalingam C
2021-12-08 16:11 ` Andi Shyti [this message]
2021-12-08 14:16 ` [Intel-gfx] [PATCH 4/4] drm/i915: enforce min page size for scratch Ramalingam C
2021-12-08 14:16 ` Ramalingam C
2021-12-08 16:12 ` [Intel-gfx] " Andi Shyti
2021-12-08 15:34 ` [Intel-gfx] ✗ Fi.CI.SPARSE: warning for drm/i915: Basic enabling of 64k page support Patchwork
2021-12-08 16:15 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-12-08 20:36 ` [Intel-gfx] ✗ Fi.CI.SPARSE: warning for drm/i915: Basic enabling of 64k page support (rev2) Patchwork
2021-12-08 21:04 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-12-09 3:14 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2021-12-09 16:45 ` [Intel-gfx] [PATCH 0/4] drm/i915: Basic enabling of 64k page support Ramalingam C
2021-12-09 16:45 ` Ramalingam C
-- strict thread matches above, loose matches on Subject: below --
2021-12-07 16:51 [Intel-gfx] [PATCH 0/4] " Ramalingam C
2021-12-07 16:51 ` [Intel-gfx] [PATCH 3/4] drm/i915/gtt/xehpsdv: move scratch page to system memory Ramalingam C
2021-12-08 13:26 ` Thomas Hellström
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