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[90.63.244.31]) by smtp.gmail.com with ESMTPSA id v11-20020a5d678b000000b002f7780eee10sm2979098wru.59.2023.05.17.07.52.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 May 2023 07:52:48 -0700 (PDT) From: Alexandre Bailon To: airlied@gmail.com, daniel@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de Cc: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, sumit.semwal@linaro.org, christian.koenig@amd.com, jstephan@baylibre.com, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, khilman@baylibre.com, nbelin@baylibre.com, bero@baylibre.com Subject: [PATCH 5/7] drm/apu: allow platform driver to implement their own mmap function Date: Wed, 17 May 2023 16:52:35 +0200 Message-Id: <20230517145237.295461-6-abailon@baylibre.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230517145237.295461-1-abailon@baylibre.com> References: <20230517145237.295461-1-abailon@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230517_075253_018896_FCDCF0F2 X-CRM114-Status: GOOD ( 14.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Julien Stephan By default we will call drm_gem_mmap() unless the apu driver has declared it's own mmap handler. Signed-off-by: Julien Stephan Reviewed-by: Julien Stephan --- drivers/gpu/drm/apu/apu_drv.c | 38 +++++++++++++++++++++++++++++- drivers/gpu/drm/apu/apu_internal.h | 2 ++ 2 files changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/apu/apu_drv.c b/drivers/gpu/drm/apu/apu_drv.c index a0dce785a02a..703d4515f075 100644 --- a/drivers/gpu/drm/apu/apu_drv.c +++ b/drivers/gpu/drm/apu/apu_drv.c @@ -29,7 +29,20 @@ static const struct drm_ioctl_desc ioctls[] = { DRM_RENDER_ALLOW), }; -DEFINE_DRM_GEM_DMA_FOPS(apu_drm_ops); +static int apu_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); + +static const struct file_operations apu_drm_ops = { + .owner = THIS_MODULE, + .open = drm_open, + .release = drm_release, + .unlocked_ioctl = drm_ioctl, + .compat_ioctl = drm_compat_ioctl, + .poll = drm_poll, + .read = drm_read, + .llseek = noop_llseek, + .mmap = apu_drm_gem_mmap, + DRM_GEM_DMA_UNMAPPED_AREA_FOPS +}; static struct drm_driver apu_drm_driver = { .driver_features = DRIVER_GEM | DRIVER_SYNCOBJ, @@ -45,6 +58,29 @@ static struct drm_driver apu_drm_driver = { DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(drm_gem_dma_dumb_create), }; +/** + * apu_drm_gem_mmap() + * + * @filp: DRM file pointer + * @vma: VMA for the area to be mapped + * + * by default will call drm_gem_mmap() unless the apu driver has declared it's + * own mmap handler + * + */ +static int apu_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct drm_file *priv = filp->private_data; + struct drm_device *dev = priv->minor->dev; + struct apu_drm *apu = dev->dev_private; + + if (apu->mmap) + return apu->mmap(filp, vma); + else + return drm_gem_mmap(filp, vma); +} + + /** * apu_dev_alloc() - Allocate a new APU device * diff --git a/drivers/gpu/drm/apu/apu_internal.h b/drivers/gpu/drm/apu/apu_internal.h index ea4183f3fb15..46e0b2be7821 100644 --- a/drivers/gpu/drm/apu/apu_internal.h +++ b/drivers/gpu/drm/apu/apu_internal.h @@ -45,6 +45,8 @@ struct apu_drm { struct iova_domain iovad; int iova_limit_pfn; + int (*mmap)(struct file *filp, struct vm_area_struct *vma); + struct list_head cores; struct list_head node;