From patchwork Fri Dec 20 03:54:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13916116 X-Patchwork-Delegate: kw@linux.com Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BDA7B2594B5 for ; Fri, 20 Dec 2024 03:54:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734666879; cv=none; b=IHzFU7lhbRYCjcvDkSE3dUgfK6hMS3l8lhu559NBFeKvTq3swlhgMzTPAG3Hk4X9NAXi6BQAgBYYxLCQfb20LMy1RHak8FKi9ZYIwwl+zma+6u46cRE/bEIcuYbtzUztwdqXxUMIl7Va5MGpW8BHlKt4NzJq4vFKbb5RpIkAEQE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734666879; c=relaxed/simple; bh=hfqR2lpF92MTjmyWR3wu96FX6jTidXXMYSzZH1bARpE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AnJYa0odm8kenE6U1u3oRtrsNXKCHTKU0Kp9IJM/MRnDpb+regJ9ZNe/lwTnW2rQ25Qb/+doi23ZvRu05SEI1DNj5TkXaVx+By+9YpwkV3ls/sCGvZ+R5mh4U3uDNxNa01xoAoMJq+/sqydOy8mtdBf4SHGxFA0UUq/F19awm5M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ModiQuv+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ModiQuv+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6BDECC4CED7; Fri, 20 Dec 2024 03:54:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734666879; bh=hfqR2lpF92MTjmyWR3wu96FX6jTidXXMYSzZH1bARpE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ModiQuv+vitrSX4LVIaSX0YLcnpG9kaRQ+f8rKbbnQlpYCa5fupB/AH2t6/5Wxnsm 936kqnNHNd5xBBWR3U9/2J1xY/VdEaoMCQmIrORxwnqM8uj6TjE5MlknjGL96Nk4vc +J2t9OCgTQjGZqlanNxCy6+Gb/315gRsfNDQ/+chOkVsvYpApcp+Qy+vccnrjUeZch n/KUUBv8zyf4VQ1GKkPHBHUEzfP/40B6lmGgxddKNH7HmKm1UTR/UJTV+T+tGFvwSk Xul7mrUxstlbmC38xd2goRfYUjTKHsYd+6bSKzvF3MkBkrTTgByuOKFRwt00MLfrB3 Im2yQEkZi+HRg== From: Damien Le Moal To: linux-nvme@lists.infradead.org, Christoph Hellwig , Keith Busch , Sagi Grimberg , linux-pci@vger.kernel.org, Manivannan Sadhasivam , =?utf-8?q?Krzyszt?= =?utf-8?q?of_Wilczy=C5=84ski?= , Kishon Vijay Abraham I , Bjorn Helgaas , Lorenzo Pieralisi Cc: Rick Wertenbroek , Niklas Cassel Subject: [PATCH v6 10/18] nvmet: Add support for I/O queue management admin commands Date: Fri, 20 Dec 2024 12:54:33 +0900 Message-ID: <20241220035441.600193-11-dlemoal@kernel.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241220035441.600193-1-dlemoal@kernel.org> References: <20241220035441.600193-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The I/O submission queue management admin commands (nvme_admin_delete_sq, nvme_admin_create_sq, nvme_admin_delete_cq, and nvme_admin_create_cq) are mandatory admin commands for I/O controllers using the PCI transport, that is, support for these commands is mandatory for a a PCI target I/O controller. Implement support for these commands by adding the functions nvmet_execute_delete_sq(), nvmet_execute_create_sq(), nvmet_execute_delete_cq() and nvmet_execute_create_cq() to set as the execute method of requests for these commands. These functions will return an invalid opcode error for any controller that is not a PCI target controller. Support for the I/O queue management commands is also reported in the command effect log of PCI target controllers (using nvmet_get_cmd_effects_admin()). Each management command is backed by a controller fabric operation that can be defined by a PCI target controller driver to setup I/O queues using nvmet_sq_create() and nvmet_cq_create() or delete I/O queues using nvmet_sq_destroy(). As noted in a comment in nvmet_execute_create_sq(), we do not yet support sharing a single CQ between multiple SQs. Signed-off-by: Damien Le Moal Reviewed-by: Christoph Hellwig Tested-by: Rick Wertenbroek --- drivers/nvme/target/admin-cmd.c | 165 +++++++++++++++++++++++++++++++- drivers/nvme/target/nvmet.h | 8 ++ 2 files changed, 170 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c index 6f7e5b0c91c7..c91864c185fc 100644 --- a/drivers/nvme/target/admin-cmd.c +++ b/drivers/nvme/target/admin-cmd.c @@ -12,6 +12,142 @@ #include #include "nvmet.h" +static void nvmet_execute_delete_sq(struct nvmet_req *req) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + u16 sqid = le16_to_cpu(req->cmd->delete_queue.qid); + u16 status; + + if (!nvmet_is_pci_ctrl(ctrl)) { + status = nvmet_report_invalid_opcode(req); + goto complete; + } + + if (!sqid) { + status = NVME_SC_QID_INVALID | NVME_STATUS_DNR; + goto complete; + } + + status = nvmet_check_sqid(ctrl, sqid, false); + if (status != NVME_SC_SUCCESS) + goto complete; + + status = ctrl->ops->delete_sq(ctrl, sqid); + +complete: + nvmet_req_complete(req, status); +} + +static void nvmet_execute_create_sq(struct nvmet_req *req) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + struct nvme_command *cmd = req->cmd; + u16 sqid = le16_to_cpu(cmd->create_sq.sqid); + u16 cqid = le16_to_cpu(cmd->create_sq.cqid); + u16 sq_flags = le16_to_cpu(cmd->create_sq.sq_flags); + u16 qsize = le16_to_cpu(cmd->create_sq.qsize); + u64 prp1 = le64_to_cpu(cmd->create_sq.prp1); + u16 status; + + if (!nvmet_is_pci_ctrl(ctrl)) { + status = nvmet_report_invalid_opcode(req); + goto complete; + } + + if (!sqid) { + status = NVME_SC_QID_INVALID | NVME_STATUS_DNR; + goto complete; + } + + status = nvmet_check_sqid(ctrl, sqid, true); + if (status != NVME_SC_SUCCESS) + goto complete; + + /* + * Note: The NVMe specification allows multiple SQs to use the same CQ. + * However, the target code does not really support that. So for now, + * prevent this and fail the command if sqid and cqid are different. + */ + if (!cqid || cqid != sqid) { + pr_err("SQ %u: Unsupported CQID %u\n", sqid, cqid); + status = NVME_SC_CQ_INVALID | NVME_STATUS_DNR; + goto complete; + } + + if (!qsize || qsize > NVME_CAP_MQES(ctrl->cap)) { + status = NVME_SC_QUEUE_SIZE | NVME_STATUS_DNR; + goto complete; + } + + status = ctrl->ops->create_sq(ctrl, sqid, sq_flags, qsize, prp1); + +complete: + nvmet_req_complete(req, status); +} + +static void nvmet_execute_delete_cq(struct nvmet_req *req) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + u16 cqid = le16_to_cpu(req->cmd->delete_queue.qid); + u16 status; + + if (!nvmet_is_pci_ctrl(ctrl)) { + status = nvmet_report_invalid_opcode(req); + goto complete; + } + + if (!cqid) { + status = NVME_SC_QID_INVALID | NVME_STATUS_DNR; + goto complete; + } + + status = nvmet_check_cqid(ctrl, cqid); + if (status != NVME_SC_SUCCESS) + goto complete; + + status = ctrl->ops->delete_cq(ctrl, cqid); + +complete: + nvmet_req_complete(req, status); +} + +static void nvmet_execute_create_cq(struct nvmet_req *req) +{ + struct nvmet_ctrl *ctrl = req->sq->ctrl; + struct nvme_command *cmd = req->cmd; + u16 cqid = le16_to_cpu(cmd->create_cq.cqid); + u16 cq_flags = le16_to_cpu(cmd->create_cq.cq_flags); + u16 qsize = le16_to_cpu(cmd->create_cq.qsize); + u16 irq_vector = le16_to_cpu(cmd->create_cq.irq_vector); + u64 prp1 = le64_to_cpu(cmd->create_cq.prp1); + u16 status; + + if (!nvmet_is_pci_ctrl(ctrl)) { + status = nvmet_report_invalid_opcode(req); + goto complete; + } + + if (!cqid) { + status = NVME_SC_QID_INVALID | NVME_STATUS_DNR; + goto complete; + } + + status = nvmet_check_cqid(ctrl, cqid); + if (status != NVME_SC_SUCCESS) + goto complete; + + if (!qsize || qsize > NVME_CAP_MQES(ctrl->cap)) { + status = NVME_SC_QUEUE_SIZE | NVME_STATUS_DNR; + goto complete; + } + + status = ctrl->ops->create_cq(ctrl, cqid, cq_flags, qsize, + prp1, irq_vector); + +complete: + nvmet_req_complete(req, status); +} + u32 nvmet_get_log_page_len(struct nvme_command *cmd) { u32 len = le16_to_cpu(cmd->get_log_page.numdu); @@ -230,8 +366,18 @@ static void nvmet_execute_get_log_page_smart(struct nvmet_req *req) nvmet_req_complete(req, status); } -static void nvmet_get_cmd_effects_admin(struct nvme_effects_log *log) +static void nvmet_get_cmd_effects_admin(struct nvmet_ctrl *ctrl, + struct nvme_effects_log *log) { + /* For a PCI target controller, advertize support for the . */ + if (nvmet_is_pci_ctrl(ctrl)) { + log->acs[nvme_admin_delete_sq] = + log->acs[nvme_admin_create_sq] = + log->acs[nvme_admin_delete_cq] = + log->acs[nvme_admin_create_cq] = + cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); + } + log->acs[nvme_admin_get_log_page] = log->acs[nvme_admin_identify] = log->acs[nvme_admin_abort_cmd] = @@ -268,6 +414,7 @@ static void nvmet_get_cmd_effects_zns(struct nvme_effects_log *log) static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) { + struct nvmet_ctrl *ctrl = req->sq->ctrl; struct nvme_effects_log *log; u16 status = NVME_SC_SUCCESS; @@ -279,7 +426,7 @@ static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) switch (req->cmd->get_log_page.csi) { case NVME_CSI_NVM: - nvmet_get_cmd_effects_admin(log); + nvmet_get_cmd_effects_admin(ctrl, log); nvmet_get_cmd_effects_nvm(log); break; case NVME_CSI_ZNS: @@ -287,7 +434,7 @@ static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) status = NVME_SC_INVALID_IO_CMD_SET; goto free; } - nvmet_get_cmd_effects_admin(log); + nvmet_get_cmd_effects_admin(ctrl, log); nvmet_get_cmd_effects_nvm(log); nvmet_get_cmd_effects_zns(log); break; @@ -1335,9 +1482,21 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req) return nvmet_parse_passthru_admin_cmd(req); switch (cmd->common.opcode) { + case nvme_admin_delete_sq: + req->execute = nvmet_execute_delete_sq; + return 0; + case nvme_admin_create_sq: + req->execute = nvmet_execute_create_sq; + return 0; case nvme_admin_get_log_page: req->execute = nvmet_execute_get_log_page; return 0; + case nvme_admin_delete_cq: + req->execute = nvmet_execute_delete_cq; + return 0; + case nvme_admin_create_cq: + req->execute = nvmet_execute_create_cq; + return 0; case nvme_admin_identify: req->execute = nvmet_execute_identify; return 0; diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index 5c8ed8f93918..86bb2852a63b 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -408,6 +408,14 @@ struct nvmet_fabrics_ops { void (*discovery_chg)(struct nvmet_port *port); u8 (*get_mdts)(const struct nvmet_ctrl *ctrl); u16 (*get_max_queue_size)(const struct nvmet_ctrl *ctrl); + + /* Operations mandatory for PCI target controllers */ + u16 (*create_sq)(struct nvmet_ctrl *ctrl, u16 sqid, u16 flags, + u16 qsize, u64 prp1); + u16 (*delete_sq)(struct nvmet_ctrl *ctrl, u16 sqid); + u16 (*create_cq)(struct nvmet_ctrl *ctrl, u16 cqid, u16 flags, + u16 qsize, u64 prp1, u16 irq_vector); + u16 (*delete_cq)(struct nvmet_ctrl *ctrl, u16 cqid); }; #define NVMET_MAX_INLINE_BIOVEC 8