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Fri, 23 Sep 2022 18:39:24 +0900 (KST) Received: from epsmtrp2.samsung.com (unknown [182.195.40.14]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPA id 20220923093924epcas5p1e1723a3937cb3331c77e55bd1a785e57~Xc9kyfmUH1084110841epcas5p1I; Fri, 23 Sep 2022 09:39:24 +0000 (GMT) Received: from epsmgms1p2.samsung.com (unknown [182.195.42.42]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20220923093924epsmtrp2e167e498a3f7e874623eb5580b477445~Xc9kxwzQ61242312423epsmtrp27; Fri, 23 Sep 2022 09:39:24 +0000 (GMT) X-AuditID: b6c32a4a-007ff70000019a35-ad-632d7eccee18 Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p2.samsung.com (Symantec Messaging Gateway) with SMTP id 89.37.18644.BCE7D236; Fri, 23 Sep 2022 18:39:23 +0900 (KST) Received: from localhost.localdomain (unknown [107.110.206.5]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20220923093921epsmtip2e025e3a47044e60cae35a5009e6eb30b~Xc9iyekxE2705227052epsmtip2a; Fri, 23 Sep 2022 09:39:21 +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, gost.dev@samsung.com, Kanchan Joshi Subject: [PATCH for-next v8 5/5] nvme: wire up fixed buffer support for nvme passthrough Date: Fri, 23 Sep 2022 14:58:54 +0530 Message-Id: <20220923092854.5116-6-joshi.k@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220923092854.5116-1-joshi.k@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupik+LIzCtJLcpLzFFi42LZdlhTQ/dMnW6ywZelohar7/azWdw8sJPJ YuXqo0wW71rPsVgc/f+WzWLSoWuMFntvaVvMX/aU3YHD4/LZUo9NqzrZPDYvqffYfbOBzaNv yypGj8+b5ALYorJtMlITU1KLFFLzkvNTMvPSbZW8g+Od403NDAx1DS0tzJUU8hJzU22VXHwC dN0yc4CuUVIoS8wpBQoFJBYXK+nb2RTll5akKmTkF5fYKqUWpOQUmBToFSfmFpfmpevlpZZY GRoYGJkCFSZkZ6zdfoypYKFyRePiL2wNjLdkuhg5OSQETCTuHF/C2MXIxSEksJtRYsnOPSwQ zidGiU/btzJBOJ8ZJU6cfswI0zJx0npmiMQuRommw9uZ4apOf28GauHgYBPQlLgwuRSkQUTA SGL/p5OsIDXMAjMYJVZ3vGYHSQgLREm8mfCUCcRmEVCV+LXrNiuIzStgLvF+yiw2iG3yEjMv fQer5xSwkFi0+RYTRI2gxMmZT1hAbGagmuats5kh6n+yS8x+7w5hu0h8f7SGCcIWlnh1fAs7 hC0l8fndXqj5yRKXZp6DqimReLznIJRtL9F6qp8Z5BdmoF/W79KHWMUn0fv7CdiLEgK8Eh1t QhDVihL3Jj1lhbDFJR7OWAJle0js75kIDdFuRokzG46yT2CUn4Xkg1lIPpiFsG0BI/MqRsnU guLc9NRi0wKjvNRyeMQm5+duYgQnSi2vHYwPH3zQO8TIxMF4iFGCg1lJhHf2Hc1kId6UxMqq 1KL8+KLSnNTiQ4ymwCCeyCwlmpwPTNV5JfGGJpYGJmZmZiaWxmaGSuK8i2doJQsJpCeWpGan phakFsH0MXFwSjUw+axJOfRtRYfcirxvLbHcMxdExr6Un2r/Y/4R5/Nhc+TeH+VeUXxC3WZS /KpOsVnfXawn2NnqnHzHFGB1PvBwyERXjSAVrX0Tj9rwrXHuuLyQUVC1vUacJ+j29GcRissn f9eZ08d2bplCbOa9l7FhultMNUzDThyWUHFLn5Ps6XhrSRu3r8S+VavWbTmRFKz94+P+KGWj XT2ae2bO9Hkku/KBOKu51+39Wl8Nfun/fHVe5dXdj7ryD5YkvHW4cXmK9NyenuMr5X30r9kz it3QfOfG3S4WGL5q3stLfKs25Qi8Do4w16nR1nAPUZu4kOHnE2XJc6+yXi+Wl9Bodzv2tyVz oW77rCM/7qipsX2er8RSnJFoqMVcVJwIALXn3pkdBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrLLMWRmVeSWpSXmKPExsWy7bCSvO7pOt1kg899Zhar7/azWdw8sJPJ YuXqo0wW71rPsVgc/f+WzWLSoWuMFntvaVvMX/aU3YHD4/LZUo9NqzrZPDYvqffYfbOBzaNv yypGj8+b5ALYorhsUlJzMstSi/TtErgy1m4/xlSwULmicfEXtgbGWzJdjJwcEgImEhMnrWfu YuTiEBLYwSjRtOg/C0RCXKL52g92CFtYYuW/5+wQRR8ZJbYsXgtUxMHBJqApcWFyKUiNiICZ xNLDa1hAapgF5jBKXL68hx2kRlggQuLFEWeQGhYBVYlfu26zgti8AuYS76fMYoOYLy8x89J3 sF2cAhYSizbfYgKxhYBqflx6wQhRLyhxcuYTsNuYgeqbt85mnsAoMAtJahaS1AJGplWMkqkF xbnpucWGBUZ5qeV6xYm5xaV56XrJ+bmbGMEhrqW1g3HPqg96hxiZOBgPMUpwMCuJ8M6+o5ks xJuSWFmVWpQfX1Sak1p8iFGag0VJnPdC18l4IYH0xJLU7NTUgtQimCwTB6dUAxNTyRHl31Nm LXO8WvhzQthW7YVigdMUC8szX0y+2+sZ9sH53BuGQDWN7W9N3ea0n1nDPnXW0ZWdTzK4Nx71 2bIkmolTyM66d4bnYoEb3Xe8lnDmSL417HkVumTyBKHn6hkyvAxMsjKHAlN0dn049fFTmsk3 1suW2Rull6XlpQjZ+bHx2nNde1fNVMjncTT/wIWGE1Fqm4xfn3hp6HHm3YMLNqsYvAM7u1bE Ttl16tbNX8o/QhVS24/d4LZcdGDX8c0f9XnObvv+0Kf09JP/m6Sedy67cU0xoPs1tz7DPKcb E43vd+j6hm803967mu/3QsH/f5gD0r4LWrsyS7/747Dh6rM7LzcoF4XmqQhsXW6hxFKckWio xVxUnAgACarZSOACAAA= X-CMS-MailID: 20220923093924epcas5p1e1723a3937cb3331c77e55bd1a785e57 X-Msg-Generator: CA CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220923093924epcas5p1e1723a3937cb3331c77e55bd1a785e57 References: <20220923092854.5116-1-joshi.k@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org if io_uring sends passthrough command with IORING_URING_CMD_FIXED 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: Kanchan Joshi --- drivers/nvme/host/ioctl.c | 39 ++++++++++++++++++++++++++------------- 1 file changed, 26 insertions(+), 13 deletions(-) diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c index 9537991deac9..0464a89c8f5a 100644 --- a/drivers/nvme/host/ioctl.c +++ b/drivers/nvme/host/ioctl.c @@ -81,9 +81,10 @@ static struct request *nvme_alloc_user_request(struct request_queue *q, return req; } -static int nvme_map_user_request(struct request *req, void __user *ubuffer, +static int nvme_map_user_request(struct request *req, u64 ubuffer, unsigned bufflen, void __user *meta_buffer, unsigned meta_len, - u32 meta_seed, void **metap, bool vec) + u32 meta_seed, void **metap, struct io_uring_cmd *ioucmd, + bool vec) { struct request_queue *q = req->q; struct nvme_ns *ns = q->queuedata; @@ -91,17 +92,29 @@ static int nvme_map_user_request(struct request *req, void __user *ubuffer, struct bio *bio = NULL; void *meta = NULL; int ret; + bool fixedbufs = ioucmd && (ioucmd->flags & IORING_URING_CMD_FIXED); if (!vec) - ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, - GFP_KERNEL); + if (!fixedbufs) + ret = blk_rq_map_user(q, req, NULL, + nvme_to_user_ptr(ubuffer), bufflen, + GFP_KERNEL); + else { + 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 { struct iovec fast_iov[UIO_FASTIOV]; struct iovec *iov = fast_iov; struct iov_iter iter; - ret = import_iovec(rq_data_dir(req), ubuffer, bufflen, - UIO_FASTIOV, &iov, &iter); + ret = import_iovec(rq_data_dir(req), nvme_to_user_ptr(ubuffer), + bufflen, UIO_FASTIOV, &iov, &iter); if (ret < 0) goto out; ret = blk_rq_map_user_iov(q, req, NULL, &iter, GFP_KERNEL); @@ -132,7 +145,7 @@ static int nvme_map_user_request(struct request *req, void __user *ubuffer, } 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) { @@ -148,7 +161,7 @@ static int nvme_submit_user_cmd(struct request_queue *q, req->timeout = timeout; if (ubuffer && bufflen) { ret = nvme_map_user_request(req, ubuffer, bufflen, meta_buffer, - meta_len, meta_seed, &meta, vec); + meta_len, meta_seed, &meta, NULL, vec); if (ret) goto out; } @@ -227,7 +240,7 @@ 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); } @@ -281,7 +294,7 @@ 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); @@ -327,7 +340,7 @@ 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); @@ -471,9 +484,9 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns, req->timeout = d.timeout_ms ? msecs_to_jiffies(d.timeout_ms) : 0; if (d.addr && d.data_len) { - ret = nvme_map_user_request(req, nvme_to_user_ptr(d.addr), + ret = nvme_map_user_request(req, d.addr, d.data_len, nvme_to_user_ptr(d.metadata), - d.metadata_len, 0, &meta, vec); + d.metadata_len, 0, &meta, ioucmd, vec); if (ret) goto out_err; }