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Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Marek Szyprowski , Robin Murphy , Rob Herring , Saravana Kannan Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, iommu@lists.linux.dev, devicetree@vger.kernel.org, Albert Esteve , echanude@redhat.com, mripard@redhat.com X-Developer-Signature: v=1; a=ed25519-sha256; t=1772541243; l=3269; i=aesteve@redhat.com; s=20260303; h=from:subject:message-id; bh=Oiyav+nKn59PGwnJ/kuaw2S3AHX/9+uyerzkejMZoD4=; b=i3wbq5E4k9VfhS9W3iaMgYMRMa0WY56H+E6aqqEhiNhouFoq+Q7bGPoRNT8RSld0ItGC3n+Mo VBn/S9AJdEHB91d8iZ3E61e216OnDtU3RjkvsWWVtnZ0J+Hin44U7YH X-Developer-Key: i=aesteve@redhat.com; a=ed25519; pk=YSFz6sOHd2L45+Fr8DIvHTi6lSIjhLZ5T+rkxspJt1s= X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: f_1CoyU4zWvScyzy7FaBWBV3wqP32wyIwczQssvy1fk_1772541270 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a helper function wrapping internal reserved memory device_init call and expose it externally. Use the new helper function within of_reserved_mem_device_init_by_idx(). Signed-off-by: Albert Esteve --- drivers/of/of_reserved_mem.c | 27 +++++++++++++++++++++++---- include/linux/of_reserved_mem.h | 8 ++++++++ 2 files changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 1fd28f8056108..3a350bef8f11e 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -605,6 +605,28 @@ struct rmem_assigned_device { static LIST_HEAD(of_rmem_assigned_device_list); static DEFINE_MUTEX(of_rmem_assigned_device_mutex); +/** + * of_reserved_mem_device_init_with_mem() - assign reserved memory region to + * given device + * @dev: Pointer to the device to configure + * @rmem: Reserved memory region to assign + * + * This function assigns respective DMA-mapping operations based on the + * reserved memory region already provided in @rmem to the @dev device, + * without walking DT nodes. + * + * Returns error code or zero on success. + */ +int of_reserved_mem_device_init_with_mem(struct device *dev, + struct reserved_mem *rmem) +{ + if (!dev || !rmem || !rmem->ops || !rmem->ops->device_init) + return -EINVAL; + + return rmem->ops->device_init(rmem, dev); +} +EXPORT_SYMBOL_GPL(of_reserved_mem_device_init_with_mem); + /** * of_reserved_mem_device_init_by_idx() - assign reserved memory region to * given device @@ -643,14 +665,11 @@ int of_reserved_mem_device_init_by_idx(struct device *dev, rmem = of_reserved_mem_lookup(target); of_node_put(target); - if (!rmem || !rmem->ops || !rmem->ops->device_init) - return -EINVAL; - rd = kmalloc_obj(struct rmem_assigned_device); if (!rd) return -ENOMEM; - ret = rmem->ops->device_init(rmem, dev); + ret = of_reserved_mem_device_init_with_mem(dev, rmem); if (ret == 0) { rd->dev = dev; rd->rmem = rmem; diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h index f573423359f48..12f7ddb7ee61f 100644 --- a/include/linux/of_reserved_mem.h +++ b/include/linux/of_reserved_mem.h @@ -32,6 +32,8 @@ typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem); #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ _OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn) +int of_reserved_mem_device_init_with_mem(struct device *dev, + struct reserved_mem *rmem); int of_reserved_mem_device_init_by_idx(struct device *dev, struct device_node *np, int idx); int of_reserved_mem_device_init_by_name(struct device *dev, @@ -51,6 +53,12 @@ int of_reserved_mem_region_count(const struct device_node *np); #define RESERVEDMEM_OF_DECLARE(name, compat, init) \ _OF_DECLARE_STUB(reservedmem, name, compat, init, reservedmem_of_init_fn) +static inline int of_reserved_mem_device_init_with_mem(struct device *dev, + struct reserved_mem *rmem) +{ + return -EOPNOTSUPP; +} + static inline int of_reserved_mem_device_init_by_idx(struct device *dev, struct device_node *np, int idx) { -- 2.52.0