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Fri, 19 Aug 2022 19:40:45 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPA id 20220819104045epcas5p117a9fcb0c3143e877e75e24ceba4f381~MuOKBZuMo0658906589epcas5p1r; Fri, 19 Aug 2022 10:40:45 +0000 (GMT) Received: from epsmgms1p2.samsung.com (unknown [182.195.42.42]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20220819104045epsmtrp107ad4c1773c12ffcfddd701f2f479a73~MuOKAraCY1513515135epsmtrp1M; Fri, 19 Aug 2022 10:40:45 +0000 (GMT) X-AuditID: b6c32a4a-1ebff70000012516-2d-62ff68ad2660 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p2.samsung.com (Symantec Messaging Gateway) with SMTP id CA.85.08802.DA86FF26; Fri, 19 Aug 2022 19:40:45 +0900 (KST) Received: from localhost.localdomain (unknown [107.110.206.5]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20220819104043epsmtip179a427156a083ce978bdad743c917f7f~MuOIhIS3p0577205772epsmtip1j; Fri, 19 Aug 2022 10:40:43 +0000 (GMT) From: Kanchan Joshi To: axboe@kernel.dk, hch@lst.de, kbusch@kernel.org Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, ming.lei@redhat.com, gost.dev@samsung.com, Kanchan Joshi , Anuj Gupta Subject: [PATCH for-next 4/4] nvme: wire up fixed buffer support for nvme passthrough Date: Fri, 19 Aug 2022 16:00:21 +0530 Message-Id: <20220819103021.240340-5-joshi.k@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220819103021.240340-1-joshi.k@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprBJsWRmVeSWpSXmKPExsWy7bCmhu7ajP9JBmcabSyaJvxltlh9t5/N 4uaBnUwWK1cfZbJ413qOxeLo/7dsFpMOXWO02HtL22L+sqfsFocmNzM5cHlcPlvqsWlVJ5vH 5iX1HrtvNrB5vN93lc2jb8sqRo/Pm+QC2KOybTJSE1NSixRS85LzUzLz0m2VvIPjneNNzQwM dQ0tLcyVFPISc1NtlVx8AnTdMnOAjlNSKEvMKQUKBSQWFyvp29kU5ZeWpCpk5BeX2CqlFqTk FJgU6BUn5haX5qXr5aWWWBkaGBiZAhUmZGec2jyVqeC/csX3OxfZGxgXy3YxcnBICJhI/D+f 3sXIxSEksJtR4tPeHlYI5xOjxJv7rWwQzmdGiTlTfrN3MXKCdbTu/QxVtYtR4sfuRcxwVbdX rGUGmcsmoClxYXIpSIOIgJHE/k8nwRqYBS4wStzbeZMFJCEsEC6x43g7K4jNIqAqsehRLzOI zStgKXHxWS8bxDZ5iZmXvoNt5hSwkpi19CobRI2gxMmZT8DmMAPVNG+dDXaEhEAvh8T1TXOh TnWReDNtKhOELSzx6vgWqLiUxMv+Nig7WeLSzHNQNSUSj/cchLLtJVpP9YM9wwz0zPpd+hC7 +CR6fz9hgoQdr0RHmxBEtaLEvUlPWSFscYmHM5awQpR4SNyfoQMJnl5giG7tZ5zAKD8LyQez kHwwC2HZAkbmVYySqQXFuempxaYFRnmp5fB4Tc7P3cQITqJaXjsYHz74oHeIkYmD8RCjBAez kgjvjTt/koR4UxIrq1KL8uOLSnNSiw8xmgKDeCKzlGhyPjCN55XEG5pYGpiYmZmZWBqbGSqJ 83pd3ZQkJJCeWJKanZpakFoE08fEwSnVwFRU+LJuq0hlX7jR1/f7aqfnz722Ysn6zQ5ZO5VY X2nENRYLunDOcItNqNFi36a7Qbjr+s3phi+CTQ85nHkp+DhNY8LJ/QdrOw91CpxP8O2+8yl/ kYh5WfAtgxkv+VUUP+ovip3irLZzzd8DK3IOr2XhfrIh5IpYTMTmpqYjyTwsKc85LZ+GfddJ FVli0PZbWm3Pzm0TQ9xDzGtZ9mwtefTr2QNehlNrLOLTvTa8araN51OJZU1ewjn32LG0+UEW c2dczbyvd2nHR77+3PluO67O2cz7eUKPzJ3Izh+ZDFZvLRbPnsactVpycmuv3o636zLszm/k OnXmRny+ruuvTgl9kcbn3BHlXp/4P2lvvarEUpyRaKjFXFScCACBHKnCKwQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrLLMWRmVeSWpSXmKPExsWy7bCSnO7ajP9JBkcnSVk0TfjLbLH6bj+b xc0DO5ksVq4+ymTxrvUci8XR/2/ZLCYdusZosfeWtsX8ZU/ZLQ5NbmZy4PK4fLbUY9OqTjaP zUvqPXbfbGDzeL/vKptH35ZVjB6fN8kFsEdx2aSk5mSWpRbp2yVwZZzaPJWp4L9yxfc7F9kb GBfLdjFyckgImEi07v3M2sXIxSEksINR4tuP9WwQCXGJ5ms/2CFsYYmV/56zQxR9ZJT4MeM8 UBEHB5uApsSFyaUgNSICZhJLD69hAalhFrjBKLGvdwoTSEJYIFRi3uwuZhCbRUBVYtGjXjCb V8BS4uKzXqhl8hIzL30HW8YpYCUxa+lVsLgQUM2vvx1MEPWCEidnPmEBsZmB6pu3zmaewCgw C0lqFpLUAkamVYySqQXFuem5xYYFRnmp5XrFibnFpXnpesn5uZsYwTGgpbWDcc+qD3qHGJk4 GA8xSnAwK4nw3rjzJ0mINyWxsiq1KD++qDQntfgQozQHi5I474Wuk/FCAumJJanZqakFqUUw WSYOTqkGJpfm19t+rpScX7Ep5/uTR0of2+5tW6B/S3nqoVvFt5LntE1aprXl7PpFKw69M7yU U+P30zbO8SkH0/VKtQVu9cvyn9sJLOXr8Pn0YKnDDv6C34Yb33L8WNwjvXyyqL472zbHedaO F983FqnIXKp2FLbbFXe3NKRkxZZ9ui93ijzJjdjq/iM2+bbt/LbOOe8shDvbbjH6++dmqJ53 YO3mPOkUvGRjj1XYpY7yY9/vfexO2Omce6hK8e6eiqAFt49wfdReFq79QTdT7mP9F8X08t9z xVqft81elxKY0i2//x5jpaXLaaWm+kWeHknXogV2he8Urj3IK7974/FU7gNv9760WtnmP0tp 7YH6p88/b1BiKc5INNRiLipOBAAkQHBq8AIAAA== X-CMS-MailID: 20220819104045epcas5p117a9fcb0c3143e877e75e24ceba4f381 X-Msg-Generator: CA CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220819104045epcas5p117a9fcb0c3143e877e75e24ceba4f381 References: <20220819103021.240340-1-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..5f2e2d31f5c7 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_fixedb(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;