From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
To: Georgi Djakov <djakov@kernel.org>
Cc: isaacm@codeaurora.org, David Airlie <airlied@linux.ie>,
Will Deacon <will@kernel.org>,
Akhil P Oommen <akhilpo@codeaurora.org>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Sean Paul <sean@poorly.run>,
Jordan Crouse <jcrouse@codeaurora.org>,
Kristian H Kristensen <hoegsberg@google.com>,
dri-devel@lists.freedesktop.org, Daniel Vetter <daniel@ffwll.ch>,
linux-arm-msm@vger.kernel.org,
freedreno <freedreno@lists.freedesktop.org>,
Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 0/3] iommu/drm/msm: Allow non-coherent masters to use system cache
Date: Thu, 29 Jul 2021 10:08:22 +0530 [thread overview]
Message-ID: <8b2742c8891abe4fec3664730717a089@codeaurora.org> (raw)
In-Reply-To: <20210728140052.GB22887@mms-0441>
Hi Georgi,
On 2021-07-28 19:30, Georgi Djakov wrote:
> On Mon, Jan 11, 2021 at 07:45:02PM +0530, Sai Prakash Ranjan wrote:
>> commit ecd7274fb4cd ("iommu: Remove unused IOMMU_SYS_CACHE_ONLY flag")
>> removed unused IOMMU_SYS_CACHE_ONLY prot flag and along with it went
>> the memory type setting required for the non-coherent masters to use
>> system cache. Now that system cache support for GPU is added, we will
>> need to set the right PTE attribute for GPU buffers to be sys cached.
>> Without this, the system cache lines are not allocated for GPU.
>>
>> So the patches in this series introduces a new prot flag IOMMU_LLC,
>> renames IO_PGTABLE_QUIRK_ARM_OUTER_WBWA to IO_PGTABLE_QUIRK_PTW_LLC
>> and makes GPU the user of this protection flag.
>
> Hi Sai,
>
> Thank you for the patchset! Are you planning to refresh it, as it does
> not apply anymore?
>
I was waiting on Will's reply [1]. If there are no changes needed, then
I can repost the patch.
[1]
https://lore.kernel.org/lkml/21239ba603d0bdc4e4c696588a905f88@codeaurora.org/
Thanks,
Sai
>
>>
>> The series slightly depends on following 2 patches posted earlier and
>> is based on msm-next branch:
>> * https://lore.kernel.org/patchwork/patch/1363008/
>> * https://lore.kernel.org/patchwork/patch/1363010/
>>
>> Sai Prakash Ranjan (3):
>> iommu/io-pgtable: Rename last-level cache quirk to
>> IO_PGTABLE_QUIRK_PTW_LLC
>> iommu/io-pgtable-arm: Add IOMMU_LLC page protection flag
>> drm/msm: Use IOMMU_LLC page protection flag to map gpu buffers
>>
>> drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 3 +++
>> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
>> drivers/gpu/drm/msm/msm_iommu.c | 3 +++
>> drivers/gpu/drm/msm/msm_mmu.h | 4 ++++
>> drivers/iommu/io-pgtable-arm.c | 9 ++++++---
>> include/linux/io-pgtable.h | 6 +++---
>> include/linux/iommu.h | 6 ++++++
>> 7 files changed, 26 insertions(+), 7 deletions(-)
>>
>>
>> base-commit: 00fd44a1a4700718d5d962432b55c09820f7e709
>> --
>> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a
>> member
>> of Code Aurora Forum, hosted by The Linux Foundation
>>
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a
member
of Code Aurora Forum, hosted by The Linux Foundation
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next prev parent reply other threads:[~2021-07-29 4:38 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-11 14:15 [PATCH 0/3] iommu/drm/msm: Allow non-coherent masters to use system cache Sai Prakash Ranjan
2021-01-11 14:15 ` [PATCH 1/3] iommu/io-pgtable: Rename last-level cache quirk to IO_PGTABLE_QUIRK_PTW_LLC Sai Prakash Ranjan
2021-01-11 14:15 ` [PATCH 2/3] iommu/io-pgtable-arm: Add IOMMU_LLC page protection flag Sai Prakash Ranjan
2021-01-29 9:05 ` Will Deacon
2021-01-29 9:42 ` Sai Prakash Ranjan
2021-02-01 11:15 ` Will Deacon
2021-02-01 16:20 ` Rob Clark
2021-02-01 18:20 ` Jordan Crouse
2021-02-02 6:26 ` Sai Prakash Ranjan
2021-02-03 21:46 ` Will Deacon
2021-02-03 22:14 ` Rob Clark
2021-03-16 17:04 ` Rob Clark
2021-03-16 17:16 ` Rob Clark
2021-02-05 12:08 ` Sai Prakash Ranjan
2021-03-09 6:40 ` Sai Prakash Ranjan
2021-03-25 17:33 ` Will Deacon
2021-06-30 10:07 ` Sai Prakash Ranjan
2021-02-02 6:28 ` Sai Prakash Ranjan
2021-01-11 14:15 ` [PATCH 3/3] drm/msm: Use IOMMU_LLC page protection flag to map gpu buffers Sai Prakash Ranjan
2021-01-20 5:18 ` [PATCH 0/3] iommu/drm/msm: Allow non-coherent masters to use system cache Sai Prakash Ranjan
2021-01-29 8:53 ` Sai Prakash Ranjan
2021-07-28 14:00 ` Georgi Djakov
2021-07-29 4:38 ` Sai Prakash Ranjan [this message]
2021-08-02 10:55 ` Will Deacon
2021-08-02 15:08 ` [Freedreno] " Rob Clark
2021-08-02 15:14 ` Will Deacon
2021-08-03 1:36 ` Rob Clark
2021-08-09 14:56 ` Will Deacon
2021-08-09 16:57 ` Rob Clark
2021-08-09 17:05 ` Will Deacon
2021-08-09 17:18 ` Rob Clark
2021-08-09 17:40 ` Will Deacon
2021-08-09 17:47 ` Sai Prakash Ranjan
2021-08-09 18:07 ` Rob Clark
2021-08-09 18:10 ` Sai Prakash Ranjan
2021-08-09 18:30 ` Rob Clark
2021-08-09 18:32 ` Sai Prakash Ranjan
2021-08-10 9:16 ` Will Deacon
2021-08-10 9:54 ` Sai Prakash Ranjan
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