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Sat, 3 Sep 2022 00:27:17 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas5p2.samsung.com (KnoxPortal) with ESMTPA id 20220902152717epcas5p26905ce7cb48e9d278976a301d73c297f~RFKUt6TBl0881008810epcas5p2J; Fri, 2 Sep 2022 15:27:17 +0000 (GMT) Received: from epsmgms1p2.samsung.com (unknown [182.195.42.42]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20220902152717epsmtrp10650adaa11baa1794771ba9f9f2cc073~RFKUtHqKo2718227182epsmtrp1Z; Fri, 2 Sep 2022 15:27:17 +0000 (GMT) X-AuditID: b6c32a49-dfdff7000000e8f1-ec-631220d5651d Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p2.samsung.com (Symantec Messaging Gateway) with SMTP id 48.BE.18644.4D022136; Sat, 3 Sep 2022 00:27:17 +0900 (KST) Received: from localhost.localdomain (unknown [107.110.206.5]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20220902152715epsmtip22bfcaff5914460519ecbe6fcc63a1c98~RFKTRlgV_1295812958epsmtip25; Fri, 2 Sep 2022 15:27:15 +0000 (GMT) From: Kanchan Joshi To: axboe@kernel.dk, hch@lst.de, kbusch@kernel.org, asml.silence@gmail.com Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, gost.dev@samsung.com, Kanchan Joshi , Anuj Gupta Subject: [PATCH for-next v3 4/4] nvme: wire up fixed buffer support for nvme passthrough Date: Fri, 2 Sep 2022 20:46:57 +0530 Message-Id: <20220902151657.10766-5-joshi.k@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220902151657.10766-1-joshi.k@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprOJsWRmVeSWpSXmKPExsWy7bCmhu5VBaFkgwsLtCyaJvxltpizahuj xeq7/WwWNw/sZLJYufook8W71nMsFkf/v2WzmHToGqPF3lvaFvOXPWV34PLYOesuu8fls6Ue m1Z1snlsXlLvsftmA5tH35ZVjB6fN8kFsEdl22SkJqakFimk5iXnp2TmpdsqeQfHO8ebmhkY 6hpaWpgrKeQl5qbaKrn4BOi6ZeYAHaekUJaYUwoUCkgsLlbSt7Mpyi8tSVXIyC8usVVKLUjJ KTAp0CtOzC0uzUvXy0stsTI0MDAyBSpMyM44NHM+Y8Ff5YqnB6ewNjAulO1i5OSQEDCRWPXy P1sXIxeHkMBuRomTD+eyQDifGCXW/F3FAlIlJPAZyLleDdOxuP8vVNEuRon79+cxwxV9mCnU xcjBwSagKXFhcilIWETAS+L+7fesIPXMIBtW/33LCpIQFoiSWDjrAFgvi4CqxPWXr9lAbF4B C4muf8sYIZbJS8y89J0dxOYUsJR4evUNK0SNoMTJmU/AjmMGqmneOpsZor6XQ+LmNXkI20Xi 6d9JbBC2sMSr41vYIWwpiZf9bVB2ssSlmeeYIOwSicd7DkLZ9hKtp/qZQX5hBvpl/S59iFV8 Er2/nzCBhCUEeCU62oQgqhUl7k16ygphi0s8nLEEyvaQuPJ7FzMkqHoYJZZMv8I0gVF+FpIP ZiH5YBbCtgWMzKsYJVMLinPTU4tNCwzzUsvh0Zqcn7uJEZxCtTx3MN598EHvECMTB+MhRgkO ZiUR3qmHBZKFeFMSK6tSi/Lji0pzUosPMZoCg3gis5Rocj4wieeVxBuaWBqYmJmZmVgamxkq ifNO0WZMFhJITyxJzU5NLUgtgulj4uCUamCSeRArI3b/X+bxM3JRvH8WSPfl9dgGpD1mP7iu ZW1qzd/T+u8fR9Xee87pK160zz/I8lFI2Qr+Y5yxq92KesP8v01ofLJ4tdUu9idb1XPm2Rvu XZjdd//+ckl7fpMsqfRMbW+TzsUdM7mOzn9g8F/UpFDDiendxNMVyZY3TsVsln3CK72qNVPd 26Nh4pOrDyet1n5jc4137pdzy5MMbnNczY4/U7P5W6Iog4GLvarptMh8vbmy5qbSV7Orep9X X+d78F9u0aLJSknbvdaknln4/82+a2qlGRFXv048wbyF6e/vXTfcQue/CJIy3hJ3rqxjs3jc Qz1n3YqGR1vqQ+Q4BdbWK7i73w/nad/y3FaJpTgj0VCLuag4EQAOP+vaKgQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrLLMWRmVeSWpSXmKPExsWy7bCSvO5VBaFkg+V7mCyaJvxltpizahuj xeq7/WwWNw/sZLJYufook8W71nMsFkf/v2WzmHToGqPF3lvaFvOXPWV34PLYOesuu8fls6Ue m1Z1snlsXlLvsftmA5tH35ZVjB6fN8kFsEdx2aSk5mSWpRbp2yVwZRyaOZ+x4K9yxdODU1gb GBfKdjFyckgImEgs7v/L0sXIxSEksINRoqvpJzNEQlyi+doPdghbWGLlv+fsEEUfGSU6H25m 62Lk4GAT0JS4MLkUpEZEIEDiYONlsBpmgYOMEuebvrGAJIQFIiQeNP8Hs1kEVCWuv3zNBmLz ClhIdP1bxgixQF5i5qXvYMs4BSwlnl59wwpiCwHV7Ji0E6peUOLkzCdgc5iB6pu3zmaewCgw C0lqFpLUAkamVYySqQXFuem5xYYFRnmp5XrFibnFpXnpesn5uZsYwTGgpbWDcc+qD3qHGJk4 GA8xSnAwK4nwTj0skCzEm5JYWZValB9fVJqTWnyIUZqDRUmc90LXyXghgfTEktTs1NSC1CKY LBMHp1QDk+uVilaHy/sZDvxvKZK82PXV27BK7J3FZD4RR64Zf+Zx5SQuayu4VDNV67pZe3Hj LOcPn85+5uCbw///ZX7h3RZ3T8kDEjZ/b5pemv7vl8aJjx4vPm3Zu77K+/S7m3MubbK2L9H/ UL6pevOXjr/39RVftnZ6rpQ9eyct+MWxw8u61qpzmNXfy0/IffXFecUilTtuM7SnSt+dUmFc 92zh0oSGr7l/tvM6GQp1OaTZbZCd/dblbNPTm95bn3508zGf75euIMMWXuB8j9mySXlKo9zR Z983993kX7UzkMXuiPk03tuKfidvvF1p7KoyK+lhMAt7m7XWrEMbHheeO5rykMv/8fvFDiVP 390LuO340leJpTgj0VCLuag4EQAmfqSK8AIAAA== X-CMS-MailID: 20220902152717epcas5p26905ce7cb48e9d278976a301d73c297f X-Msg-Generator: CA CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220902152717epcas5p26905ce7cb48e9d278976a301d73c297f References: <20220902151657.10766-1-joshi.k@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org if io_uring sends passthrough command with IO_URING_F_FIXEDBUFS flag, use the pre-registered buffer to form the bio. While at it modify nvme_submit_user_cmd to take ubuffer as plain integer argument, and do away with nvme_to_user_ptr conversion in callers. Signed-off-by: Anuj Gupta Signed-off-by: Kanchan Joshi --- drivers/nvme/host/ioctl.c | 38 ++++++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 12 deletions(-) diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c index 7756b439a688..5a4649293e86 100644 --- a/drivers/nvme/host/ioctl.c +++ b/drivers/nvme/host/ioctl.c @@ -65,10 +65,11 @@ static int nvme_finish_user_metadata(struct request *req, void __user *ubuf, } static struct request *nvme_alloc_user_request(struct request_queue *q, - struct nvme_command *cmd, void __user *ubuffer, + struct nvme_command *cmd, u64 ubuffer, unsigned bufflen, void __user *meta_buffer, unsigned meta_len, u32 meta_seed, void **metap, unsigned timeout, bool vec, - blk_opf_t rq_flags, blk_mq_req_flags_t blk_flags) + blk_opf_t rq_flags, blk_mq_req_flags_t blk_flags, + struct io_uring_cmd *ioucmd, bool fixedbufs) { bool write = nvme_is_write(cmd); struct nvme_ns *ns = q->queuedata; @@ -89,14 +90,27 @@ static struct request *nvme_alloc_user_request(struct request_queue *q, if (ubuffer && bufflen) { if (!vec) - ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, - GFP_KERNEL); + if (fixedbufs) { + struct iov_iter iter; + + ret = io_uring_cmd_import_fixed(ubuffer, + bufflen, rq_data_dir(req), + &iter, ioucmd); + if (ret < 0) + goto out; + ret = blk_rq_map_user_bvec(req, &iter); + } else { + ret = blk_rq_map_user(q, req, NULL, + nvme_to_user_ptr(ubuffer), + bufflen, GFP_KERNEL); + } else { struct iovec fast_iov[UIO_FASTIOV]; struct iovec *iov = fast_iov; struct iov_iter iter; - ret = import_iovec(rq_data_dir(req), ubuffer, bufflen, + ret = import_iovec(rq_data_dir(req), + nvme_to_user_ptr(ubuffer), bufflen, UIO_FASTIOV, &iov, &iter); if (ret < 0) goto out; @@ -132,7 +146,7 @@ static struct request *nvme_alloc_user_request(struct request_queue *q, } static int nvme_submit_user_cmd(struct request_queue *q, - struct nvme_command *cmd, void __user *ubuffer, + struct nvme_command *cmd, u64 ubuffer, unsigned bufflen, void __user *meta_buffer, unsigned meta_len, u32 meta_seed, u64 *result, unsigned timeout, bool vec) { @@ -142,7 +156,7 @@ static int nvme_submit_user_cmd(struct request_queue *q, int ret; req = nvme_alloc_user_request(q, cmd, ubuffer, bufflen, meta_buffer, - meta_len, meta_seed, &meta, timeout, vec, 0, 0); + meta_len, meta_seed, &meta, timeout, vec, 0, 0, NULL, 0); if (IS_ERR(req)) return PTR_ERR(req); @@ -220,7 +234,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) c.rw.appmask = cpu_to_le16(io.appmask); return nvme_submit_user_cmd(ns->queue, &c, - nvme_to_user_ptr(io.addr), length, + io.addr, length, metadata, meta_len, lower_32_bits(io.slba), NULL, 0, false); } @@ -274,7 +288,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, timeout = msecs_to_jiffies(cmd.timeout_ms); status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, - nvme_to_user_ptr(cmd.addr), cmd.data_len, + cmd.addr, cmd.data_len, nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, 0, &result, timeout, false); @@ -320,7 +334,7 @@ static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns, timeout = msecs_to_jiffies(cmd.timeout_ms); status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, - nvme_to_user_ptr(cmd.addr), cmd.data_len, + cmd.addr, cmd.data_len, nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, 0, &cmd.result, timeout, vec); @@ -457,11 +471,11 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns, rq_flags |= REQ_POLLED; retry: - req = nvme_alloc_user_request(q, &c, nvme_to_user_ptr(d.addr), + req = nvme_alloc_user_request(q, &c, d.addr, d.data_len, nvme_to_user_ptr(d.metadata), d.metadata_len, 0, &meta, d.timeout_ms ? msecs_to_jiffies(d.timeout_ms) : 0, vec, rq_flags, - blk_flags); + blk_flags, ioucmd, issue_flags & IO_URING_F_FIXEDBUFS); if (IS_ERR(req)) return PTR_ERR(req); req->end_io = nvme_uring_cmd_end_io;