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{
    "id": 2175207,
    "url": "http://patchwork.ozlabs.org/api/1.0/patches/2175207/?format=api",
    "project": {
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        "name": "Linux PCI development",
        "link_name": "linux-pci",
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    "msgid": "<20251217151609.3162665-9-den@valinux.co.jp>",
    "date": "2025-12-17T15:15:42",
    "name": "[RFC,v3,08/35] NTB: core: Add .get_private_data() to ntb_dev_ops",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
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    "hash": "97eac5edcecb818609db8d608bba2db989693563",
    "submitter": {
        "id": 91573,
        "url": "http://patchwork.ozlabs.org/api/1.0/people/91573/?format=api",
        "name": "Koichiro Den",
        "email": "den@valinux.co.jp"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20251217151609.3162665-9-den@valinux.co.jp/mbox/",
    "series": [
        {
            "id": 485709,
            "url": "http://patchwork.ozlabs.org/api/1.0/series/485709/?format=api",
            "date": "2025-12-17T15:15:53",
            "name": "NTB transport backed by endpoint DW eDMA",
            "version": 3,
            "mbox": "http://patchwork.ozlabs.org/series/485709/mbox/"
        }
    ],
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        "From": "Koichiro Den <den@valinux.co.jp>",
        "To": "Frank.Li@nxp.com,\n\tdave.jiang@intel.com,\n\tntb@lists.linux.dev,\n\tlinux-pci@vger.kernel.org,\n\tdmaengine@vger.kernel.org,\n\tlinux-renesas-soc@vger.kernel.org,\n\tnetdev@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org",
        "Cc": "mani@kernel.org,\n\tkwilczynski@kernel.org,\n\tkishon@kernel.org,\n\tbhelgaas@google.com,\n\tcorbet@lwn.net,\n\tgeert+renesas@glider.be,\n\tmagnus.damm@gmail.com,\n\trobh@kernel.org,\n\tkrzk+dt@kernel.org,\n\tconor+dt@kernel.org,\n\tvkoul@kernel.org,\n\tjoro@8bytes.org,\n\twill@kernel.org,\n\trobin.murphy@arm.com,\n\tjdmason@kudzu.us,\n\tallenbh@gmail.com,\n\tandrew+netdev@lunn.ch,\n\tdavem@davemloft.net,\n\tedumazet@google.com,\n\tkuba@kernel.org,\n\tpabeni@redhat.com,\n\tBasavaraj.Natikar@amd.com,\n\tShyam-sundar.S-k@amd.com,\n\tkurt.schwemmer@microsemi.com,\n\tlogang@deltatee.com,\n\tjingoohan1@gmail.com,\n\tlpieralisi@kernel.org,\n\tutkarsh02t@gmail.com,\n\tjbrunet@baylibre.com,\n\tdlemoal@kernel.org,\n\tarnd@arndb.de,\n\telfring@users.sourceforge.net,\n\tden@valinux.co.jp",
        "Subject": "[RFC PATCH v3 08/35] NTB: core: Add .get_private_data() to\n ntb_dev_ops",
        "Date": "Thu, 18 Dec 2025 00:15:42 +0900",
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    },
    "content": "Add an optional get_private_data() callback to retrieve a private data\nspecific to the underlying hardware driver, e.g. pci_epc device\nassociated with the NTB implementation.\n\nSigned-off-by: Koichiro Den <den@valinux.co.jp>\n---\n include/linux/ntb.h | 20 ++++++++++++++++++++\n 1 file changed, 20 insertions(+)",
    "diff": "diff --git a/include/linux/ntb.h b/include/linux/ntb.h\nindex d7ce5d2e60d0..0dcd9bb57f47 100644\n--- a/include/linux/ntb.h\n+++ b/include/linux/ntb.h\n@@ -256,6 +256,7 @@ static inline int ntb_ctx_ops_is_valid(const struct ntb_ctx_ops *ops)\n  * @msg_clear_mask:\tSee ntb_msg_clear_mask().\n  * @msg_read:\t\tSee ntb_msg_read().\n  * @peer_msg_write:\tSee ntb_peer_msg_write().\n+ * @get_private_data:\tSee ntb_get_private_data().\n  */\n struct ntb_dev_ops {\n \tint (*port_number)(struct ntb_dev *ntb);\n@@ -331,6 +332,7 @@ struct ntb_dev_ops {\n \tint (*msg_clear_mask)(struct ntb_dev *ntb, u64 mask_bits);\n \tu32 (*msg_read)(struct ntb_dev *ntb, int *pidx, int midx);\n \tint (*peer_msg_write)(struct ntb_dev *ntb, int pidx, int midx, u32 msg);\n+\tvoid *(*get_private_data)(struct ntb_dev *ntb);\n };\n \n static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops *ops)\n@@ -393,6 +395,9 @@ static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops *ops)\n \t\t/* !ops->msg_clear_mask == !ops->msg_count\t&& */\n \t\t!ops->msg_read == !ops->msg_count\t\t&&\n \t\t!ops->peer_msg_write == !ops->msg_count\t\t&&\n+\n+\t\t/* Miscellaneous optional callbacks */\n+\t\t/* ops->get_private_data\t\t\t&& */\n \t\t1;\n }\n \n@@ -1567,6 +1572,21 @@ static inline int ntb_peer_msg_write(struct ntb_dev *ntb, int pidx, int midx,\n \treturn ntb->ops->peer_msg_write(ntb, pidx, midx, msg);\n }\n \n+/**\n+ * ntb_get_private_data() - get private data specific to the hardware driver\n+ * @ntb:\tNTB device context.\n+ *\n+ * Retrieve private data specific to the hardware driver.\n+ *\n+ * Return: Pointer to the private data if available. or %NULL if not.\n+ */\n+static inline void __maybe_unused *ntb_get_private_data(struct ntb_dev *ntb)\n+{\n+\tif (!ntb->ops->get_private_data)\n+\t\treturn NULL;\n+\treturn ntb->ops->get_private_data(ntb);\n+}\n+\n /**\n  * ntb_peer_resource_idx() - get a resource index for a given peer idx\n  * @ntb:\tNTB device context.\n",
    "prefixes": [
        "RFC",
        "v3",
        "08/35"
    ]
}