From: Thomas Zimmermann <tzimmermann@suse.de>
To: Keith Zhao <keith.zhao@starfivetech.com>,
dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Sumit Semwal <sumit.semwal@linaro.org>,
Emil Renner Berthing <kernel@esmil.dk>,
Shengyang Chen <shengyang.chen@starfivetech.com>,
Conor Dooley <conor+dt@kernel.org>,
Albert Ou <aou@eecs.berkeley.edu>, Jagan Teki <jagan@edgeble.ai>,
Rob Herring <robh+dt@kernel.org>,
Chris Morgan <macromorgan@hotmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Bjorn Andersson <andersson@kernel.org>,
Changhuang Liang <changhuang.liang@starfivetech.com>,
Jack Zhu <jack.zhu@starfivetech.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Shawn Guo <shawnguo@kernel.org>,
christian.koenig@amd.com
Subject: Re: [PATCH 4/9] drm/verisilicon: Add gem driver for JH7110 SoC
Date: Mon, 19 Jun 2023 16:22:26 +0200 [thread overview]
Message-ID: <f7ded369-e384-db01-dc8c-6a5183f20409@suse.de> (raw)
In-Reply-To: <20230602074043.33872-5-keith.zhao@starfivetech.com>
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Hi
Am 02.06.23 um 09:40 schrieb Keith Zhao:
> This patch implements gem related APIs for JH7100 SoC.
please also see my other reply to this patch. My mail client had a bug
before I could finish it. Below are some more comments.
>
> Signed-off-by: Keith Zhao <keith.zhao@starfivetech.com>
> ---
[...]
> +#ifndef __VS_GEM_H__
> +#define __VS_GEM_H__
> +
> +#include <linux/dma-buf.h>
> +
> +#include <drm/drm_gem.h>
> +#include <drm/drm_prime.h>
> +
> +#include "vs_drv.h"
> +/*
> + *
> + * @base: drm gem object.
> + * @size: size requested from user
> + * @cookie: cookie returned by dma_alloc_attrs
> + * - not kernel virtual address with DMA_ATTR_NO_KERNEL_MAPPING
> + * @dma_addr: bus address(accessed by dma) to allocated memory region.
> + * - this address could be physical address without IOMMU and
> + * device address with IOMMU.
> + * @dma_attrs: attribute for DMA API
> + * @get_pages: flag for manually applying for non-contiguous memory.
> + * @pages: Array of backing pages.
> + * @sgt: Imported sg_table.
> + *
> + */
> +struct vs_gem_object {
> + struct drm_gem_object base;
> + size_t size;
> + void *cookie;
> + dma_addr_t dma_addr;
> + u32 iova;
> + unsigned long dma_attrs;
> + bool get_pages;
> + struct page **pages;
> + struct sg_table *sgt;
> +};
> +
> +static inline
> +struct vs_gem_object *to_vs_gem_object(struct drm_gem_object *obj)
> +{
> + return container_of(obj, struct vs_gem_object, base);
> +}
> +
> +struct vs_gem_object *vs_gem_create_object(struct drm_device *dev,
> + size_t size);
> +
> +int vs_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
> +void vs_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
I'd consider this bad style. Your functions are in the vs_ namespace, so
they should take a vs_gem_object as first argument. Rather implement
vs_gem_prime_vmap(struct vs_gem_object *vs_obj, struct iosys_map *map)
and _vunmap() and _mmap().
For the callbacks in struct drm_gemobject_funcs, you can write small
wrappers around the helpers to do the type casting. See
drm_gem_shmem_object_mmap() and drm_gem_shmem_mmap() for an example.
https://elixir.bootlin.com/linux/latest/source/include/drm/drm_gem_shmem_helper.h#L233
> +
> +int vs_gem_prime_mmap(struct drm_gem_object *obj,
> + struct vm_area_struct *vma);
> +
> +int vs_gem_dumb_create(struct drm_file *file_priv,
> + struct drm_device *drm,
> + struct drm_mode_create_dumb *args);
> +
> +int vs_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> +
> +struct sg_table *vs_gem_prime_get_sg_table(struct drm_gem_object *obj);
> +
> +struct drm_gem_object *vs_gem_prime_import(struct drm_device *dev,
> + struct dma_buf *dma_buf);
> +struct drm_gem_object *
> +vs_gem_prime_import_sg_table(struct drm_device *dev,
> + struct dma_buf_attachment *attach,
> + struct sg_table *sgt);
> +
> +#endif /* __VS_GEM_H__ */
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
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next prev parent reply other threads:[~2023-06-19 14:22 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-02 7:40 [PATCH 0/9] Add DRM driver for StarFive SoC JH7110 Keith Zhao
2023-06-02 7:40 ` [PATCH 1/9] dt-bindings: display: Add yamls for JH7110 display subsystem Keith Zhao
2023-06-02 18:21 ` Conor Dooley
2023-06-06 18:41 ` Shengyu Qu
2023-06-06 22:22 ` Heiko Stübner
2023-06-06 22:37 ` Conor Dooley
2023-06-07 6:41 ` Maxime Ripard
2023-06-07 8:02 ` Keith Zhao
2023-06-07 8:40 ` Heiko Stübner
2023-06-07 7:35 ` Krzysztof Kozlowski
2023-06-02 7:40 ` [PATCH 2/9] riscv: dts: starfive: jh7110: add dc&hdmi controller node Keith Zhao
2023-06-07 7:38 ` Krzysztof Kozlowski
2023-06-02 7:40 ` [PATCH 3/9] drm/verisilicon: Add basic drm driver Keith Zhao
2023-06-07 8:53 ` Lucas Stach
2023-07-25 3:12 ` Keith Zhao
2023-07-25 11:23 ` Keith Zhao
2023-06-19 12:59 ` Thomas Zimmermann
2023-07-07 18:09 ` Nicolas Dufresne
2023-07-08 19:11 ` Thomas Zimmermann
2023-07-13 15:14 ` Nicolas Dufresne
2023-07-03 18:42 ` Shengyu Qu
2023-07-04 6:09 ` Keith Zhao
2023-06-02 7:40 ` [PATCH 4/9] drm/verisilicon: Add gem driver for JH7110 SoC Keith Zhao
2023-06-19 13:18 ` Thomas Zimmermann
2023-07-20 10:00 ` Keith Zhao
2023-06-19 14:22 ` Thomas Zimmermann [this message]
2023-06-21 10:44 ` Thomas Zimmermann
2023-06-02 7:40 ` [PATCH 5/9] drm/verisilicon: Add mode config funcs Keith Zhao
2023-06-21 11:04 ` Thomas Zimmermann
2023-07-21 9:06 ` Keith Zhao
2023-06-02 7:40 ` [PATCH 6/9] drm/verisilicon: Add drm crtc funcs Keith Zhao
2023-06-30 11:55 ` Thomas Zimmermann
2023-07-21 11:57 ` Keith Zhao
2023-07-21 12:32 ` Sam Ravnborg
2023-06-02 7:40 ` [PATCH 7/9] drm/verisilicon: Add drm plane funcs Keith Zhao
2023-06-30 12:14 ` Thomas Zimmermann
2023-07-10 16:46 ` Shengyu Qu
2023-07-11 1:44 ` Keith Zhao
2023-06-02 7:40 ` [PATCH 8/9] drm/verisilicon: Add verisilicon dc controller driver Keith Zhao
2023-06-30 12:36 ` Thomas Zimmermann
2023-06-02 7:40 ` [PATCH 9/9] drm/verisilicon: Add starfive hdmi driver Keith Zhao
2023-06-05 8:08 ` Philipp Zabel
2023-06-05 9:56 ` Maxime Ripard
2023-06-23 2:38 ` Hoegeun Kwon
2023-06-26 5:34 ` Keith Zhao
2023-06-22 18:19 ` [PATCH 0/9] Add DRM driver for StarFive SoC JH7110 Palmer Dabbelt
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