From: Danilo Krummrich <dakr@redhat.com>
To: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH drm-next 03/14] drm: manager to keep track of GPUs VA mappings
Date: Fri, 20 Jan 2023 19:32:01 +0100 [thread overview]
Message-ID: <c4f7f126-4284-4227-34a7-a30e6f2bffcf@redhat.com> (raw)
In-Reply-To: <Y8jDsqGc5gXoIBAO@debian.me>
On 1/19/23 05:14, Bagas Sanjaya wrote:
> On Wed, Jan 18, 2023 at 07:12:45AM +0100, Danilo Krummrich wrote:
>> This adds the infrastructure for a manager implementation to keep track
>> of GPU virtual address (VA) mappings.
>
> "Add infrastructure for ..."
>
>> + * Analogue to drm_gpuva_sm_map_ops_create() drm_gpuva_sm_unmap_ops_create()
>> + * provides drivers a the list of operations to be executed in order to unmap
>> + * a range of GPU VA space. The logic behind this functions is way simpler
>> + * though: For all existent mappings enclosed by the given range unmap
>> + * operations are created. For mappings which are only partically located within
>> + * the given range, remap operations are created such that those mappings are
>> + * split up and re-mapped partically.
>
> "Analogous to ..."
>
>> + *
>> + * The following paragraph depicts the basic constellations of existent GPU VA
>> + * mappings, a newly requested mapping and the resulting mappings as implemented
>> + * by drm_gpuva_sm_map_ops_create() - it doesn't cover arbitrary combinations
>> + * of those constellations.
>> + *
>> + * ::
>> + *
>> + * 1) Existent mapping is kept.
>> + * ----------------------------
>> + *
>> + * 0 a 1
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 0 a 1
>> + * req: |-----------| (bo_offset=n)
>> + *
>> + * 0 a 1
>> + * new: |-----------| (bo_offset=n)
>> + *
>> + *
>> + * 2) Existent mapping is replaced.
>> + * --------------------------------
>> + *
>> + * 0 a 1
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 0 a 1
>> + * req: |-----------| (bo_offset=m)
>> + *
>> + * 0 a 1
>> + * new: |-----------| (bo_offset=m)
>> + *
>> + *
>> + * 3) Existent mapping is replaced.
>> + * --------------------------------
>> + *
>> + * 0 a 1
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 0 b 1
>> + * req: |-----------| (bo_offset=n)
>> + *
>> + * 0 b 1
>> + * new: |-----------| (bo_offset=n)
>> + *
>> + *
>> + * 4) Existent mapping is replaced.
>> + * --------------------------------
>> + *
>> + * 0 a 1
>> + * old: |-----| (bo_offset=n)
>> + *
>> + * 0 a 2
>> + * req: |-----------| (bo_offset=n)
>> + *
>> + * 0 a 2
>> + * new: |-----------| (bo_offset=n)
>> + *
>> + * Note: We expect to see the same result for a request with a different bo
>> + * and/or bo_offset.
>> + *
>> + *
>> + * 5) Existent mapping is split.
>> + * -----------------------------
>> + *
>> + * 0 a 2
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 0 b 1
>> + * req: |-----| (bo_offset=n)
>> + *
>> + * 0 b 1 a' 2
>> + * new: |-----|-----| (b.bo_offset=n, a.bo_offset=n+1)
>> + *
>> + * Note: We expect to see the same result for a request with a different bo
>> + * and/or non-contiguous bo_offset.
>> + *
>> + *
>> + * 6) Existent mapping is kept.
>> + * ----------------------------
>> + *
>> + * 0 a 2
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 0 a 1
>> + * req: |-----| (bo_offset=n)
>> + *
>> + * 0 a 2
>> + * new: |-----------| (bo_offset=n)
>> + *
>> + *
>> + * 7) Existent mapping is split.
>> + * -----------------------------
>> + *
>> + * 0 a 2
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 1 b 2
>> + * req: |-----| (bo_offset=m)
>> + *
>> + * 0 a 1 b 2
>> + * new: |-----|-----| (a.bo_offset=n,b.bo_offset=m)
>> + *
>> + *
>> + * 8) Existent mapping is kept.
>> + * ----------------------------
>> + *
>> + * 0 a 2
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 1 a 2
>> + * req: |-----| (bo_offset=n+1)
>> + *
>> + * 0 a 2
>> + * new: |-----------| (bo_offset=n)
>> + *
>> + *
>> + * 9) Existent mapping is split.
>> + * -----------------------------
>> + *
>> + * 0 a 2
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 1 b 3
>> + * req: |-----------| (bo_offset=m)
>> + *
>> + * 0 a 1 b 3
>> + * new: |-----|-----------| (a.bo_offset=n,b.bo_offset=m)
>> + *
>> + *
>> + * 10) Existent mapping is merged.
>> + * -------------------------------
>> + *
>> + * 0 a 2
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 1 a 3
>> + * req: |-----------| (bo_offset=n+1)
>> + *
>> + * 0 a 3
>> + * new: |-----------------| (bo_offset=n)
>> + *
>> + *
>> + * 11) Existent mapping is split.
>> + * ------------------------------
>> + *
>> + * 0 a 3
>> + * old: |-----------------| (bo_offset=n)
>> + *
>> + * 1 b 2
>> + * req: |-----| (bo_offset=m)
>> + *
>> + * 0 a 1 b 2 a' 3
>> + * new: |-----|-----|-----| (a.bo_offset=n,b.bo_offset=m,a'.bo_offset=n+2)
>> + *
>> + *
>> + * 12) Existent mapping is kept.
>> + * -----------------------------
>> + *
>> + * 0 a 3
>> + * old: |-----------------| (bo_offset=n)
>> + *
>> + * 1 a 2
>> + * req: |-----| (bo_offset=n+1)
>> + *
>> + * 0 a 3
>> + * old: |-----------------| (bo_offset=n)
>> + *
>> + *
>> + * 13) Existent mapping is replaced.
>> + * ---------------------------------
>> + *
>> + * 1 a 2
>> + * old: |-----| (bo_offset=n)
>> + *
>> + * 0 a 2
>> + * req: |-----------| (bo_offset=n)
>> + *
>> + * 0 a 2
>> + * new: |-----------| (bo_offset=n)
>> + *
>> + * Note: We expect to see the same result for a request with a different bo
>> + * and/or non-contiguous bo_offset.
>> + *
>> + *
>> + * 14) Existent mapping is replaced.
>> + * ---------------------------------
>> + *
>> + * 1 a 2
>> + * old: |-----| (bo_offset=n)
>> + *
>> + * 0 a 3
>> + * req: |----------------| (bo_offset=n)
>> + *
>> + * 0 a 3
>> + * new: |----------------| (bo_offset=n)
>> + *
>> + * Note: We expect to see the same result for a request with a different bo
>> + * and/or non-contiguous bo_offset.
>> + *
>> + *
>> + * 15) Existent mapping is split.
>> + * ------------------------------
>> + *
>> + * 1 a 3
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 0 b 2
>> + * req: |-----------| (bo_offset=m)
>> + *
>> + * 0 b 2 a' 3
>> + * new: |-----------|-----| (b.bo_offset=m,a.bo_offset=n+2)
>> + *
>> + *
>> + * 16) Existent mappings are merged.
>> + * ---------------------------------
>> + *
>> + * 0 a 1
>> + * old: |-----------| (bo_offset=n)
>> + *
>> + * 2 a 3
>> + * old': |-----------| (bo_offset=n+2)
>> + *
>> + * 1 a 2
>> + * req: |-----------| (bo_offset=n+1)
>> + *
>> + * a
>> + * new: |----------------------------------| (bo_offset=n)
>> + */
>
> Factor out lists from the big code block above:
>
> ---- >8 ----
>
Thanks for your feedback and the patch, it's highly appreciated.
- Danilo
> diff --git a/drivers/gpu/drm/drm_gpuva_mgr.c b/drivers/gpu/drm/drm_gpuva_mgr.c
> index e665f642689d03..411c0aa80bfa1f 100644
> --- a/drivers/gpu/drm/drm_gpuva_mgr.c
> +++ b/drivers/gpu/drm/drm_gpuva_mgr.c
> @@ -129,15 +129,14 @@
> * the given range, remap operations are created such that those mappings are
> * split up and re-mapped partically.
> *
> - * The following paragraph depicts the basic constellations of existent GPU VA
> + * The following diagram depicts the basic relationships of existent GPU VA
> * mappings, a newly requested mapping and the resulting mappings as implemented
> - * by drm_gpuva_sm_map_ops_create() - it doesn't cover arbitrary combinations
> - * of those constellations.
> + * by drm_gpuva_sm_map_ops_create() - it doesn't cover any arbitrary
> + * combinations of these.
> *
> - * ::
> - *
> - * 1) Existent mapping is kept.
> - * ----------------------------
> + * 1) Existent mapping is kept.
> + *
> + * ::
> *
> * 0 a 1
> * old: |-----------| (bo_offset=n)
> @@ -149,8 +148,9 @@
> * new: |-----------| (bo_offset=n)
> *
> *
> - * 2) Existent mapping is replaced.
> - * --------------------------------
> + * 2) Existent mapping is replaced.
> + *
> + * ::
> *
> * 0 a 1
> * old: |-----------| (bo_offset=n)
> @@ -162,8 +162,9 @@
> * new: |-----------| (bo_offset=m)
> *
> *
> - * 3) Existent mapping is replaced.
> - * --------------------------------
> + * 3) Existent mapping is replaced.
> + *
> + * ::
> *
> * 0 a 1
> * old: |-----------| (bo_offset=n)
> @@ -175,8 +176,9 @@
> * new: |-----------| (bo_offset=n)
> *
> *
> - * 4) Existent mapping is replaced.
> - * --------------------------------
> + * 4) Existent mapping is replaced.
> + *
> + * ::
> *
> * 0 a 1
> * old: |-----| (bo_offset=n)
> @@ -187,12 +189,14 @@
> * 0 a 2
> * new: |-----------| (bo_offset=n)
> *
> - * Note: We expect to see the same result for a request with a different bo
> - * and/or bo_offset.
> + * .. note::
> + * We expect to see the same result for a request with a different bo
> + * and/or bo_offset.
> *
> *
> - * 5) Existent mapping is split.
> - * -----------------------------
> + * 5) Existent mapping is split.
> + *
> + * ::
> *
> * 0 a 2
> * old: |-----------| (bo_offset=n)
> @@ -203,12 +207,14 @@
> * 0 b 1 a' 2
> * new: |-----|-----| (b.bo_offset=n, a.bo_offset=n+1)
> *
> - * Note: We expect to see the same result for a request with a different bo
> - * and/or non-contiguous bo_offset.
> + * .. note::
> + * We expect to see the same result for a request with a different bo
> + * and/or non-contiguous bo_offset.
> *
> *
> - * 6) Existent mapping is kept.
> - * ----------------------------
> + * 6) Existent mapping is kept.
> + *
> + * ::
> *
> * 0 a 2
> * old: |-----------| (bo_offset=n)
> @@ -220,8 +226,9 @@
> * new: |-----------| (bo_offset=n)
> *
> *
> - * 7) Existent mapping is split.
> - * -----------------------------
> + * 7) Existent mapping is split.
> + *
> + * ::
> *
> * 0 a 2
> * old: |-----------| (bo_offset=n)
> @@ -233,8 +240,9 @@
> * new: |-----|-----| (a.bo_offset=n,b.bo_offset=m)
> *
> *
> - * 8) Existent mapping is kept.
> - * ----------------------------
> + * 8) Existent mapping is kept.
> + *
> + * ::
> *
> * 0 a 2
> * old: |-----------| (bo_offset=n)
> @@ -246,8 +254,9 @@
> * new: |-----------| (bo_offset=n)
> *
> *
> - * 9) Existent mapping is split.
> - * -----------------------------
> + * 9) Existent mapping is split.
> + *
> + * ::
> *
> * 0 a 2
> * old: |-----------| (bo_offset=n)
> @@ -259,104 +268,113 @@
> * new: |-----|-----------| (a.bo_offset=n,b.bo_offset=m)
> *
> *
> - * 10) Existent mapping is merged.
> - * -------------------------------
> + * 10) Existent mapping is merged.
> *
> - * 0 a 2
> - * old: |-----------| (bo_offset=n)
> + * ::
> *
> - * 1 a 3
> - * req: |-----------| (bo_offset=n+1)
> + * 0 a 2
> + * old: |-----------| (bo_offset=n)
> *
> - * 0 a 3
> - * new: |-----------------| (bo_offset=n)
> + * 1 a 3
> + * req: |-----------| (bo_offset=n+1)
> + *
> + * 0 a 3
> + * new: |-----------------| (bo_offset=n)
> *
> *
> - * 11) Existent mapping is split.
> - * ------------------------------
> + * 11) Existent mapping is split.
> *
> - * 0 a 3
> - * old: |-----------------| (bo_offset=n)
> + * ::
> *
> - * 1 b 2
> - * req: |-----| (bo_offset=m)
> + * 0 a 3
> + * old: |-----------------| (bo_offset=n)
> *
> - * 0 a 1 b 2 a' 3
> - * new: |-----|-----|-----| (a.bo_offset=n,b.bo_offset=m,a'.bo_offset=n+2)
> + * 1 b 2
> + * req: |-----| (bo_offset=m)
> + *
> + * 0 a 1 b 2 a' 3
> + * new: |-----|-----|-----| (a.bo_offset=n,b.bo_offset=m,a'.bo_offset=n+2)
> *
> *
> - * 12) Existent mapping is kept.
> - * -----------------------------
> + * 12) Existent mapping is kept.
> *
> - * 0 a 3
> - * old: |-----------------| (bo_offset=n)
> + * ::
> *
> - * 1 a 2
> - * req: |-----| (bo_offset=n+1)
> + * 0 a 3
> + * old: |-----------------| (bo_offset=n)
> *
> - * 0 a 3
> - * old: |-----------------| (bo_offset=n)
> + * 1 a 2
> + * req: |-----| (bo_offset=n+1)
> + *
> + * 0 a 3
> + * old: |-----------------| (bo_offset=n)
> *
> *
> - * 13) Existent mapping is replaced.
> - * ---------------------------------
> + * 13) Existent mapping is replaced.
> *
> - * 1 a 2
> - * old: |-----| (bo_offset=n)
> + * ::
> *
> - * 0 a 2
> - * req: |-----------| (bo_offset=n)
> + * 1 a 2
> + * old: |-----| (bo_offset=n)
> *
> - * 0 a 2
> - * new: |-----------| (bo_offset=n)
> + * 0 a 2
> + * req: |-----------| (bo_offset=n)
> *
> - * Note: We expect to see the same result for a request with a different bo
> - * and/or non-contiguous bo_offset.
> + * 0 a 2
> + * new: |-----------| (bo_offset=n)
> + *
> + * .. note::
> + * We expect to see the same result for a request with a different bo
> + * and/or non-contiguous bo_offset.
> *
> *
> - * 14) Existent mapping is replaced.
> - * ---------------------------------
> + * 14) Existent mapping is replaced.
> *
> - * 1 a 2
> - * old: |-----| (bo_offset=n)
> + * ::
> *
> - * 0 a 3
> - * req: |----------------| (bo_offset=n)
> + * 1 a 2
> + * old: |-----| (bo_offset=n)
> *
> - * 0 a 3
> - * new: |----------------| (bo_offset=n)
> + * 0 a 3
> + * req: |----------------| (bo_offset=n)
> *
> - * Note: We expect to see the same result for a request with a different bo
> - * and/or non-contiguous bo_offset.
> + * 0 a 3
> + * new: |----------------| (bo_offset=n)
> + *
> + * .. note::
> + * We expect to see the same result for a request with a different bo
> + * and/or non-contiguous bo_offset.
> *
> *
> - * 15) Existent mapping is split.
> - * ------------------------------
> + * 15) Existent mapping is split.
> *
> - * 1 a 3
> - * old: |-----------| (bo_offset=n)
> + * ::
> *
> - * 0 b 2
> - * req: |-----------| (bo_offset=m)
> + * 1 a 3
> + * old: |-----------| (bo_offset=n)
> *
> - * 0 b 2 a' 3
> - * new: |-----------|-----| (b.bo_offset=m,a.bo_offset=n+2)
> + * 0 b 2
> + * req: |-----------| (bo_offset=m)
> + *
> + * 0 b 2 a' 3
> + * new: |-----------|-----| (b.bo_offset=m,a.bo_offset=n+2)
> *
> *
> - * 16) Existent mappings are merged.
> - * ---------------------------------
> + * 16) Existent mappings are merged.
> *
> - * 0 a 1
> - * old: |-----------| (bo_offset=n)
> + * ::
> *
> - * 2 a 3
> - * old': |-----------| (bo_offset=n+2)
> + * 0 a 1
> + * old: |-----------| (bo_offset=n)
> *
> - * 1 a 2
> - * req: |-----------| (bo_offset=n+1)
> + * 2 a 3
> + * old': |-----------| (bo_offset=n+2)
> *
> - * a
> - * new: |----------------------------------| (bo_offset=n)
> + * 1 a 2
> + * req: |-----------| (bo_offset=n+1)
> + *
> + * a
> + * new: |----------------------------------| (bo_offset=n)
> */
>
> /**
>
> However, the relationship scenario descriptions are too generic (different
> diagrams are described by the same text). Please rewrite them, taking into
> account bo_offset values in each scenario.
>
> Thanks.
>
next prev parent reply other threads:[~2023-01-20 18:32 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-18 6:12 [PATCH drm-next 00/14] [RFC] DRM GPUVA Manager & Nouveau VM_BIND UAPI Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 01/14] drm: execution context for GEM buffers Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 02/14] drm/exec: fix memory leak in drm_exec_prepare_obj() Danilo Krummrich
2023-01-18 8:51 ` Christian König
2023-01-18 19:00 ` Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 03/14] drm: manager to keep track of GPUs VA mappings Danilo Krummrich
2023-01-19 4:14 ` Bagas Sanjaya
2023-01-20 18:32 ` Danilo Krummrich [this message]
2023-01-23 23:23 ` Niranjana Vishwanathapura
2023-01-26 23:43 ` Matthew Brost
2023-01-27 0:24 ` Matthew Brost
2023-02-03 17:37 ` Matthew Brost
2023-02-06 13:35 ` Christian König
2023-02-06 13:46 ` Danilo Krummrich
2023-02-14 11:52 ` Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 04/14] drm: debugfs: provide infrastructure to dump a DRM GPU VA space Danilo Krummrich
2023-01-18 13:55 ` kernel test robot
2023-01-18 15:47 ` kernel test robot
2023-01-18 6:12 ` [PATCH drm-next 05/14] drm/nouveau: new VM_BIND uapi interfaces Danilo Krummrich
2023-01-27 1:05 ` Matthew Brost
2023-01-27 1:26 ` Danilo Krummrich
2023-01-27 7:55 ` Christian König
2023-01-27 13:12 ` Danilo Krummrich
2023-01-27 13:23 ` Christian König
2023-01-27 14:44 ` Danilo Krummrich
2023-01-27 15:17 ` Christian König
2023-01-27 20:25 ` David Airlie
2023-01-30 12:58 ` Christian König
2023-01-27 21:09 ` Danilo Krummrich
2023-01-29 18:46 ` Danilo Krummrich
2023-01-30 13:02 ` Christian König
2023-01-30 23:38 ` Danilo Krummrich
2023-02-01 8:10 ` [Nouveau] " Dave Airlie
2023-02-02 11:53 ` Christian König
2023-02-02 18:31 ` Danilo Krummrich
2023-02-06 9:48 ` Christian König
2023-02-06 13:27 ` Danilo Krummrich
2023-02-06 16:14 ` Christian König
2023-02-06 18:20 ` Danilo Krummrich
2023-02-07 9:35 ` Christian König
2023-02-07 10:50 ` Danilo Krummrich
2023-02-10 11:50 ` Christian König
2023-02-10 12:47 ` Danilo Krummrich
2023-01-27 1:43 ` Danilo Krummrich
2023-01-27 3:21 ` Matthew Brost
2023-01-27 3:33 ` Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 06/14] drm/nouveau: get vmm via nouveau_cli_vmm() Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 07/14] drm/nouveau: bo: initialize GEM GPU VA interface Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 08/14] drm/nouveau: move usercopy helpers to nouveau_drv.h Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 09/14] drm/nouveau: fence: fail to emit when fence context is killed Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 10/14] drm/nouveau: chan: provide nouveau_channel_kill() Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 11/14] drm/nouveau: nvkm/vmm: implement raw ops to manage uvmm Danilo Krummrich
2023-01-20 3:37 ` kernel test robot
2023-01-18 6:12 ` [PATCH drm-next 12/14] drm/nouveau: implement uvmm for user mode bindings Danilo Krummrich
2023-01-18 6:12 ` [PATCH drm-next 13/14] drm/nouveau: implement new VM_BIND UAPI Danilo Krummrich
2023-01-18 20:37 ` Thomas Hellström (Intel)
2023-01-19 3:44 ` Danilo Krummrich
2023-01-19 4:58 ` Matthew Brost
2023-01-19 7:32 ` Thomas Hellström (Intel)
2023-01-20 10:08 ` Boris Brezillon
2023-01-18 6:12 ` [PATCH drm-next 14/14] drm/nouveau: debugfs: implement DRM GPU VA debugfs Danilo Krummrich
2023-01-18 8:53 ` [PATCH drm-next 00/14] [RFC] DRM GPUVA Manager & Nouveau VM_BIND UAPI Christian König
2023-01-18 15:34 ` Danilo Krummrich
2023-01-18 15:37 ` Christian König
2023-01-18 16:19 ` Danilo Krummrich
2023-01-18 16:30 ` Alex Deucher
2023-01-18 16:50 ` Danilo Krummrich
2023-01-18 16:54 ` Alex Deucher
2023-01-18 19:17 ` Dave Airlie
2023-01-18 19:48 ` Christian König
2023-01-19 4:04 ` Danilo Krummrich
2023-01-19 5:23 ` Matthew Brost
2023-01-19 11:33 ` drm_gpuva_manager requirements (was Re: [PATCH drm-next 00/14] [RFC] DRM GPUVA Manager & Nouveau VM_BIND UAPI) Christian König
2023-02-06 14:48 ` [PATCH drm-next 00/14] [RFC] DRM GPUVA Manager & Nouveau VM_BIND UAPI Oded Gabbay
2023-03-16 16:39 ` Danilo Krummrich
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