diff options
Diffstat (limited to 'drivers/nvme/host')
| -rw-r--r-- | drivers/nvme/host/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/nvme/host/Makefile | 3 | ||||
| -rw-r--r-- | drivers/nvme/host/core.c | 150 | ||||
| -rw-r--r-- | drivers/nvme/host/fabrics.c | 33 | ||||
| -rw-r--r-- | drivers/nvme/host/fc.c | 2586 | ||||
| -rw-r--r-- | drivers/nvme/host/lightnvm.c | 223 | ||||
| -rw-r--r-- | drivers/nvme/host/nvme.h | 51 | ||||
| -rw-r--r-- | drivers/nvme/host/pci.c | 47 | ||||
| -rw-r--r-- | drivers/nvme/host/rdma.c | 43 | ||||
| -rw-r--r-- | drivers/nvme/host/scsi.c | 11 |
10 files changed, 2964 insertions, 200 deletions
diff --git a/drivers/nvme/host/Kconfig b/drivers/nvme/host/Kconfig index f7d37a6..90745a6 100644 --- a/drivers/nvme/host/Kconfig +++ b/drivers/nvme/host/Kconfig @@ -43,3 +43,20 @@ config NVME_RDMA from https://github.com/linux-nvme/nvme-cli. If unsure, say N. + +config NVME_FC + tristate "NVM Express over Fabrics FC host driver" + depends on BLOCK + depends on HAS_DMA + select NVME_CORE + select NVME_FABRICS + select SG_POOL + help + This provides support for the NVMe over Fabrics protocol using + the FC transport. This allows you to use remote block devices + exported using the NVMe protocol set. + + To configure a NVMe over Fabrics controller use the nvme-cli tool + from https://github.com/linux-nvme/nvme-cli. + + If unsure, say N. diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile index 47abcec..f1a7d94 100644 --- a/drivers/nvme/host/Makefile +++ b/drivers/nvme/host/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_NVME_CORE) += nvme-core.o obj-$(CONFIG_BLK_DEV_NVME) += nvme.o obj-$(CONFIG_NVME_FABRICS) += nvme-fabrics.o obj-$(CONFIG_NVME_RDMA) += nvme-rdma.o +obj-$(CONFIG_NVME_FC) += nvme-fc.o nvme-core-y := core.o nvme-core-$(CONFIG_BLK_DEV_NVME_SCSI) += scsi.o @@ -12,3 +13,5 @@ nvme-y += pci.o nvme-fabrics-y += fabrics.o nvme-rdma-y += rdma.o + +nvme-fc-y += fc.o diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 79e679d..35b3fee 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -201,13 +201,7 @@ fail: void nvme_requeue_req(struct request *req) { - unsigned long flags; - - blk_mq_requeue_request(req); - spin_lock_irqsave(req->q->queue_lock, flags); - if (!blk_queue_stopped(req->q)) - blk_mq_kick_requeue_list(req->q); - spin_unlock_irqrestore(req->q->queue_lock, flags); + blk_mq_requeue_request(req, !blk_mq_queue_stopped(req->q)); } EXPORT_SYMBOL_GPL(nvme_requeue_req); @@ -227,8 +221,7 @@ struct request *nvme_alloc_request(struct request_queue *q, req->cmd_type = REQ_TYPE_DRV_PRIV; req->cmd_flags |= REQ_FAILFAST_DRIVER; - req->cmd = (unsigned char *)cmd; - req->cmd_len = sizeof(struct nvme_command); + nvme_req(req)->cmd = cmd; return req; } @@ -246,8 +239,6 @@ static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req, struct nvme_command *cmnd) { struct nvme_dsm_range *range; - struct page *page; - int offset; unsigned int nr_bytes = blk_rq_bytes(req); range = kmalloc(sizeof(*range), GFP_ATOMIC); @@ -264,19 +255,27 @@ static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req, cmnd->dsm.nr = 0; cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); - req->completion_data = range; - page = virt_to_page(range); - offset = offset_in_page(range); - blk_add_request_payload(req, page, offset, sizeof(*range)); + req->special_vec.bv_page = virt_to_page(range); + req->special_vec.bv_offset = offset_in_page(range); + req->special_vec.bv_len = sizeof(*range); + req->rq_flags |= RQF_SPECIAL_PAYLOAD; - /* - * we set __data_len back to the size of the area to be discarded - * on disk. This allows us to report completion on the full amount - * of blocks described by the request. - */ - req->__data_len = nr_bytes; + return BLK_MQ_RQ_QUEUE_OK; +} - return 0; +static inline void nvme_setup_write_zeroes(struct nvme_ns *ns, + struct request *req, struct nvme_command *cmnd) +{ + struct nvme_write_zeroes_cmd *write_zeroes = &cmnd->write_zeroes; + + memset(cmnd, 0, sizeof(*cmnd)); + write_zeroes->opcode = nvme_cmd_write_zeroes; + write_zeroes->nsid = cpu_to_le32(ns->ns_id); + write_zeroes->slba = + cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); + write_zeroes->length = + cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); + write_zeroes->control = 0; } static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, @@ -295,7 +294,6 @@ static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, memset(cmnd, 0, sizeof(*cmnd)); cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); - cmnd->rw.command_id = req->tag; cmnd->rw.nsid = cpu_to_le32(ns->ns_id); cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); @@ -324,17 +322,21 @@ static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, struct nvme_command *cmd) { - int ret = 0; + int ret = BLK_MQ_RQ_QUEUE_OK; if (req->cmd_type == REQ_TYPE_DRV_PRIV) - memcpy(cmd, req->cmd, sizeof(*cmd)); + memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); else if (req_op(req) == REQ_OP_FLUSH) nvme_setup_flush(ns, cmd); else if (req_op(req) == REQ_OP_DISCARD) ret = nvme_setup_discard(ns, req, cmd); + else if (req_op(req) == REQ_OP_WRITE_ZEROES) + nvme_setup_write_zeroes(ns, req, cmd); else nvme_setup_rw(ns, req, cmd); + cmd->common.command_id = req->tag; + return ret; } EXPORT_SYMBOL_GPL(nvme_setup_cmd); @@ -344,7 +346,7 @@ EXPORT_SYMBOL_GPL(nvme_setup_cmd); * if the result is positive, it's an NVM Express status code */ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, - struct nvme_completion *cqe, void *buffer, unsigned bufflen, + union nvme_result *result, void *buffer, unsigned bufflen, unsigned timeout, int qid, int at_head, int flags) { struct request *req; @@ -355,7 +357,6 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, return PTR_ERR(req); req->timeout = timeout ? timeout : ADMIN_TIMEOUT; - req->special = cqe; if (buffer && bufflen) { ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); @@ -364,6 +365,8 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, } blk_execute_rq(req->q, NULL, req, at_head); + if (result) + *result = nvme_req(req)->result; ret = req->errors; out: blk_mq_free_request(req); @@ -385,7 +388,6 @@ int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, u32 *result, unsigned timeout) { bool write = nvme_is_write(cmd); - struct nvme_completion cqe; struct nvme_ns *ns = q->queuedata; struct gendisk *disk = ns ? ns->disk : NULL; struct request *req; @@ -398,7 +400,6 @@ int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, return PTR_ERR(req); req->timeout = timeout ? timeout : ADMIN_TIMEOUT; - req->special = &cqe; if (ubuffer && bufflen) { ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, @@ -453,7 +454,7 @@ int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, blk_execute_rq(req->q, disk, req, 0); ret = req->errors; if (result) - *result = le32_to_cpu(cqe.result); + *result = le32_to_cpu(nvme_req(req)->result.u32); if (meta && !ret && !write) { if (copy_to_user(meta_buffer, meta, meta_len)) ret = -EFAULT; @@ -602,7 +603,7 @@ int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, void *buffer, size_t buflen, u32 *result) { struct nvme_command c; - struct nvme_completion cqe; + union nvme_result res; int ret; memset(&c, 0, sizeof(c)); @@ -610,10 +611,10 @@ int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, c.features.nsid = cpu_to_le32(nsid); c.features.fid = cpu_to_le32(fid); - ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, buffer, buflen, 0, + ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, buffer, buflen, 0, NVME_QID_ANY, 0, 0); if (ret >= 0 && result) - *result = le32_to_cpu(cqe.result); + *result = le32_to_cpu(res.u32); return ret; } @@ -621,7 +622,7 @@ int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, void *buffer, size_t buflen, u32 *result) { struct nvme_command c; - struct nvme_completion cqe; + union nvme_result res; int ret; memset(&c, 0, sizeof(c)); @@ -629,10 +630,10 @@ int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, c.features.fid = cpu_to_le32(fid); c.features.dword11 = cpu_to_le32(dword11); - ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, + ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, buffer, buflen, 0, NVME_QID_ANY, 0, 0); if (ret >= 0 && result) - *result = le32_to_cpu(cqe.result); + *result = le32_to_cpu(res.u32); return ret; } @@ -951,6 +952,10 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id) if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM) nvme_config_discard(ns); + if (ns->ctrl->oncs & NVME_CTRL_ONCS_WRITE_ZEROES) + blk_queue_max_write_zeroes_sectors(ns->queue, + ((u32)(USHRT_MAX + 1) * bs) >> 9); + blk_mq_unfreeze_queue(disk->queue); } @@ -1683,27 +1688,24 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) if (nvme_revalidate_ns(ns, &id)) goto out_free_queue; - if (nvme_nvm_ns_supported(ns, id)) { - if (nvme_nvm_register(ns, disk_name, node, - &nvme_ns_attr_group)) { - dev_warn(ctrl->dev, "%s: LightNVM init failure\n", - __func__); - goto out_free_id; - } - } else { - disk = alloc_disk_node(0, node); - if (!disk) - goto out_free_id; + if (nvme_nvm_ns_supported(ns, id) && + nvme_nvm_register(ns, disk_name, node)) { + dev_warn(ctrl->dev, "%s: LightNVM init failure\n", __func__); + goto out_free_id; + } - disk->fops = &nvme_fops; - disk->private_data = ns; - disk->queue = ns->queue; - disk->flags = GENHD_FL_EXT_DEVT; - memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); - ns->disk = disk; + disk = alloc_disk_node(0, node); + if (!disk) + goto out_free_id; - __nvme_revalidate_disk(disk, id); - } + disk->fops = &nvme_fops; + disk->private_data = ns; + disk->queue = ns->queue; + disk->flags = GENHD_FL_EXT_DEVT; + memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); + ns->disk = disk; + + __nvme_revalidate_disk(disk, id); mutex_lock(&ctrl->namespaces_mutex); list_add_tail(&ns->list, &ctrl->namespaces); @@ -1713,14 +1715,14 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) kfree(id); - if (ns->ndev) - return; - device_add_disk(ctrl->device, ns->disk); if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj, &nvme_ns_attr_group)) pr_warn("%s: failed to create sysfs group for identification\n", ns->disk->disk_name); + if (ns->ndev && nvme_nvm_register_sysfs(ns)) + pr_warn("%s: failed to register lightnvm sysfs group for identification\n", + ns->disk->disk_name); return; out_free_id: kfree(id); @@ -1742,6 +1744,8 @@ static void nvme_ns_remove(struct nvme_ns *ns) blk_integrity_unregister(ns->disk); sysfs_remove_group(&disk_to_dev(ns->disk)->kobj, &nvme_ns_attr_group); + if (ns->ndev) + nvme_nvm_unregister_sysfs(ns); del_gendisk(ns->disk); blk_mq_abort_requeue_list(ns->queue); blk_cleanup_queue(ns->queue); @@ -1905,18 +1909,25 @@ static void nvme_async_event_work(struct work_struct *work) spin_unlock_irq(&ctrl->lock); } -void nvme_complete_async_event(struct nvme_ctrl *ctrl, - struct nvme_completion *cqe) +void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, + union nvme_result *res) { - u16 status = le16_to_cpu(cqe->status) >> 1; - u32 result = le32_to_cpu(cqe->result); + u32 result = le32_to_cpu(res->u32); + bool done = true; - if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) { + switch (le16_to_cpu(status) >> 1) { + case NVME_SC_SUCCESS: + done = false; + /*FALLTHRU*/ + case NVME_SC_ABORT_REQ: ++ctrl->event_limit; schedule_work(&ctrl->async_event_work); + break; + default: + break; } - if (status != NVME_SC_SUCCESS) + if (done) return; switch (result & 0xff07) { @@ -2078,14 +2089,8 @@ void nvme_stop_queues(struct nvme_ctrl *ctrl) struct nvme_ns *ns; mutex_lock(&ctrl->namespaces_mutex); - list_for_each_entry(ns, &ctrl->namespaces, list) { - spin_lock_irq(ns->queue->queue_lock); - queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); - spin_unlock_irq(ns->queue->queue_lock); - - blk_mq_cancel_requeue_work(ns->queue); - blk_mq_stop_hw_queues(ns->queue); - } + list_for_each_entry(ns, &ctrl->namespaces, list) + blk_mq_quiesce_queue(ns->queue); mutex_unlock(&ctrl->namespaces_mutex); } EXPORT_SYMBOL_GPL(nvme_stop_queues); @@ -2096,7 +2101,6 @@ void nvme_start_queues(struct nvme_ctrl *ctrl) mutex_lock(&ctrl->namespaces_mutex); list_for_each_entry(ns, &ctrl->namespaces, list) { - queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); blk_mq_start_stopped_hw_queues(ns->queue, true); blk_mq_kick_requeue_list(ns->queue); } diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c index 5a3f008..916d136 100644 --- a/drivers/nvme/host/fabrics.c +++ b/drivers/nvme/host/fabrics.c @@ -161,7 +161,7 @@ EXPORT_SYMBOL_GPL(nvmf_get_subsysnqn); int nvmf_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) { struct nvme_command cmd; - struct nvme_completion cqe; + union nvme_result res; int ret; memset(&cmd, 0, sizeof(cmd)); @@ -169,11 +169,11 @@ int nvmf_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) cmd.prop_get.fctype = nvme_fabrics_type_property_get; cmd.prop_get.offset = cpu_to_le32(off); - ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &cqe, NULL, 0, 0, + ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &res, NULL, 0, 0, NVME_QID_ANY, 0, 0); if (ret >= 0) - *val = le64_to_cpu(cqe.result64); + *val = le64_to_cpu(res.u64); if (unlikely(ret != 0)) dev_err(ctrl->device, "Property Get error: %d, offset %#x\n", @@ -207,7 +207,7 @@ EXPORT_SYMBOL_GPL(nvmf_reg_read32); int nvmf_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) { struct nvme_command cmd; - struct nvme_completion cqe; + union nvme_result res; int ret; memset(&cmd, 0, sizeof(cmd)); @@ -216,11 +216,11 @@ int nvmf_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) cmd.prop_get.attrib = 1; cmd.prop_get.offset = cpu_to_le32(off); - ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &cqe, NULL, 0, 0, + ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &res, NULL, 0, 0, NVME_QID_ANY, 0, 0); if (ret >= 0) - *val = le64_to_cpu(cqe.result64); + *val = le64_to_cpu(res.u64); if (unlikely(ret != 0)) dev_err(ctrl->device, "Property Get error: %d, offset %#x\n", @@ -368,7 +368,7 @@ static void nvmf_log_connect_error(struct nvme_ctrl *ctrl, int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl) { struct nvme_command cmd; - struct nvme_completion cqe; + union nvme_result res; struct nvmf_connect_data *data; int ret; @@ -400,16 +400,16 @@ int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl) strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE); strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE); - ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &cqe, + ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &res, data, sizeof(*data), 0, NVME_QID_ANY, 1, BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT); if (ret) { - nvmf_log_connect_error(ctrl, ret, le32_to_cpu(cqe.result), + nvmf_log_connect_error(ctrl, ret, le32_to_cpu(res.u32), &cmd, data); goto out_free_data; } - ctrl->cntlid = le16_to_cpu(cqe.result16); + ctrl->cntlid = le16_to_cpu(res.u16); out_free_data: kfree(data); @@ -441,7 +441,7 @@ int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid) { struct nvme_command cmd; struct nvmf_connect_data *data; - struct nvme_completion cqe; + union nvme_result res; int ret; memset(&cmd, 0, sizeof(cmd)); @@ -459,11 +459,11 @@ int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid) strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE); strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE); - ret = __nvme_submit_sync_cmd(ctrl->connect_q, &cmd, &cqe, + ret = __nvme_submit_sync_cmd(ctrl->connect_q, &cmd, &res, data, sizeof(*data), 0, qid, 1, BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT); if (ret) { - nvmf_log_connect_error(ctrl, ret, le32_to_cpu(cqe.result), + nvmf_log_connect_error(ctrl, ret, le32_to_cpu(res.u32), &cmd, data); } kfree(data); @@ -576,7 +576,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts, nqnlen = strlen(opts->subsysnqn); if (nqnlen >= NVMF_NQN_SIZE) { pr_err("%s needs to be < %d bytes\n", - opts->subsysnqn, NVMF_NQN_SIZE); + opts->subsysnqn, NVMF_NQN_SIZE); ret = -EINVAL; goto out; } @@ -666,10 +666,12 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts, if (nqnlen >= NVMF_NQN_SIZE) { pr_err("%s needs to be < %d bytes\n", p, NVMF_NQN_SIZE); + kfree(p); ret = -EINVAL; goto out; } opts->host = nvmf_host_add(p); + kfree(p); if (!opts->host) { ret = -ENOMEM; goto out; @@ -825,8 +827,7 @@ nvmf_create_ctrl(struct device *dev, const char *buf, size_t count) out_unlock: mutex_unlock(&nvmf_transports_mutex); out_free_opts: - nvmf_host_put(opts->host); - kfree(opts); + nvmf_free_options(opts); return ERR_PTR(ret); } diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c new file mode 100644 index 0000000..771e2e7 --- /dev/null +++ b/drivers/nvme/host/fc.c @@ -0,0 +1,2586 @@ +/* + * Copyright (c) 2016 Avago Technologies. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful. + * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, + * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A + * PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO + * THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID. + * See the GNU General Public License for more details, a copy of which + * can be found in the file COPYING included with this package + * + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/module.h> +#include <linux/parser.h> +#include <uapi/scsi/fc/fc_fs.h> +#include <uapi/scsi/fc/fc_els.h> + +#include "nvme.h" +#include "fabrics.h" +#include <linux/nvme-fc-driver.h> +#include <linux/nvme-fc.h> + + +/* *************************** Data Structures/Defines ****************** */ + + +/* + * We handle AEN commands ourselves and don't even let the + * block layer know about them. + */ +#define NVME_FC_NR_AEN_COMMANDS 1 +#define NVME_FC_AQ_BLKMQ_DEPTH \ + (NVMF_AQ_DEPTH - NVME_FC_NR_AEN_COMMANDS) +#define AEN_CMDID_BASE (NVME_FC_AQ_BLKMQ_DEPTH + 1) + +enum nvme_fc_queue_flags { + NVME_FC_Q_CONNECTED = (1 << 0), +}; + +#define NVMEFC_QUEUE_DELAY 3 /* ms units */ + +struct nvme_fc_queue { + struct nvme_fc_ctrl *ctrl; + struct device *dev; + struct blk_mq_hw_ctx *hctx; + void *lldd_handle; + int queue_size; + size_t cmnd_capsule_len; + u32 qnum; + u32 rqcnt; + u32 seqno; + + u64 connection_id; + atomic_t csn; + + unsigned long flags; +} __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ + +struct nvmefc_ls_req_op { + struct nvmefc_ls_req ls_req; + + struct nvme_fc_ctrl *ctrl; + struct nvme_fc_queue *queue; + struct request *rq; + + int ls_error; + struct completion ls_done; + struct list_head lsreq_list; /* ctrl->ls_req_list */ + bool req_queued; +}; + +enum nvme_fcpop_state { + FCPOP_STATE_UNINIT = 0, + FCPOP_STATE_IDLE = 1, + FCPOP_STATE_ACTIVE = 2, + FCPOP_STATE_ABORTED = 3, +}; + +struct nvme_fc_fcp_op { + struct nvme_request nreq; /* + * nvme/host/core.c + * requires this to be + * the 1st element in the + * private structure + * associated with the + * request. + */ + struct nvmefc_fcp_req fcp_req; + + struct nvme_fc_ctrl *ctrl; + struct nvme_fc_queue *queue; + struct request *rq; + + atomic_t state; + u32 rqno; + u32 nents; + + struct nvme_fc_cmd_iu cmd_iu; + struct nvme_fc_ersp_iu rsp_iu; +}; + +struct nvme_fc_lport { + struct nvme_fc_local_port localport; + + struct ida endp_cnt; + struct list_head port_list; /* nvme_fc_port_list */ + struct list_head endp_list; + struct device *dev; /* physical device for dma */ + struct nvme_fc_port_template *ops; + struct kref ref; +} __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ + +struct nvme_fc_rport { + struct nvme_fc_remote_port remoteport; + + struct list_head endp_list; /* for lport->endp_list */ + struct list_head ctrl_list; + spinlock_t lock; + struct kref ref; +} __aligned(sizeof(u64)); /* alignment for other things alloc'd with */ + +enum nvme_fcctrl_state { + FCCTRL_INIT = 0, + FCCTRL_ACTIVE = 1, +}; + +struct nvme_fc_ctrl { + spinlock_t lock; + struct nvme_fc_queue *queues; + u32 queue_count; + + struct device *dev; + struct nvme_fc_lport *lport; + struct nvme_fc_rport *rport; + u32 cnum; + + u64 association_id; + + u64 cap; + + struct list_head ctrl_list; /* rport->ctrl_list */ + struct list_head ls_req_list; + + struct blk_mq_tag_set admin_tag_set; + struct blk_mq_tag_set tag_set; + + struct work_struct delete_work; + struct kref ref; + int state; + + struct nvme_fc_fcp_op aen_ops[NVME_FC_NR_AEN_COMMANDS]; + + struct nvme_ctrl ctrl; +}; + +static inline struct nvme_fc_ctrl * +to_fc_ctrl(struct nvme_ctrl *ctrl) +{ + return container_of(ctrl, struct nvme_fc_ctrl, ctrl); +} + +static inline struct nvme_fc_lport * +localport_to_lport(struct nvme_fc_local_port *portptr) +{ + return container_of(portptr, struct nvme_fc_lport, localport); +} + +static inline struct nvme_fc_rport * +remoteport_to_rport(struct nvme_fc_remote_port *portptr) +{ + return container_of(portptr, struct nvme_fc_rport, remoteport); +} + +static inline struct nvmefc_ls_req_op * +ls_req_to_lsop(struct nvmefc_ls_req *lsreq) +{ + return container_of(lsreq, struct nvmefc_ls_req_op, ls_req); +} + +static inline struct nvme_fc_fcp_op * +fcp_req_to_fcp_op(struct nvmefc_fcp_req *fcpreq) +{ + return container_of(fcpreq, struct nvme_fc_fcp_op, fcp_req); +} + + + +/* *************************** Globals **************************** */ + + +static DEFINE_SPINLOCK(nvme_fc_lock); + +static LIST_HEAD(nvme_fc_lport_list); +static DEFINE_IDA(nvme_fc_local_port_cnt); +static DEFINE_IDA(nvme_fc_ctrl_cnt); + +static struct workqueue_struct *nvme_fc_wq; + + + +/* *********************** FC-NVME Port Management ************************ */ + +static int __nvme_fc_del_ctrl(struct nvme_fc_ctrl *); +static void __nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *, + struct nvme_fc_queue *, unsigned int); + + +/** + * nvme_fc_register_localport - transport entry point called by an + * LLDD to register the existence of a NVME + * host FC port. + * @pinfo: pointer to information about the port to be registered + * @template: LLDD entrypoints and operational parameters for the port + * @dev: physical hardware device node port corresponds to. Will be + * used for DMA mappings + * @lport_p: pointer to a local port pointer. Upon success, the routine + * will allocate a nvme_fc_local_port structure and place its + * address in the local port pointer. Upon failure, local port + * pointer will be set to 0. + * + * Returns: + * a completion status. Must be 0 upon success; a negative errno + * (ex: -ENXIO) upon failure. + */ +int +nvme_fc_register_localport(struct nvme_fc_port_info *pinfo, + struct nvme_fc_port_template *template, + struct device *dev, + struct nvme_fc_local_port **portptr) +{ + struct nvme_fc_lport *newrec; + unsigned long flags; + int ret, idx; + + if (!template->localport_delete || !template->remoteport_delete || + !template->ls_req || !template->fcp_io || + !template->ls_abort || !template->fcp_abort || + !template->max_hw_queues || !template->max_sgl_segments || + !template->max_dif_sgl_segments || !template->dma_boundary) { + ret = -EINVAL; + goto out_reghost_failed; + } + + newrec = kmalloc((sizeof(*newrec) + template->local_priv_sz), + GFP_KERNEL); + if (!newrec) { + ret = -ENOMEM; + goto out_reghost_failed; + } + + idx = ida_simple_get(&nvme_fc_local_port_cnt, 0, 0, GFP_KERNEL); + if (idx < 0) { + ret = -ENOSPC; + goto out_fail_kfree; + } + + if (!get_device(dev) && dev) { + ret = -ENODEV; + goto out_ida_put; + } + + INIT_LIST_HEAD(&newrec->port_list); + INIT_LIST_HEAD(&newrec->endp_list); + kref_init(&newrec->ref); + newrec->ops = template; + newrec->dev = dev; + ida_init(&newrec->endp_cnt); + newrec->localport.private = &newrec[1]; + newrec->localport.node_name = pinfo->node_name; + newrec->localport.port_name = pinfo->port_name; + newrec->localport.port_role = pinfo->port_role; + newrec->localport.port_id = pinfo->port_id; + newrec->localport.port_state = FC_OBJSTATE_ONLINE; + newrec->localport.port_num = idx; + + spin_lock_irqsave(&nvme_fc_lock, flags); + list_add_tail(&newrec->port_list, &nvme_fc_lport_list); + spin_unlock_irqrestore(&nvme_fc_lock, flags); + + if (dev) + dma_set_seg_boundary(dev, template->dma_boundary); + + *portptr = &newrec->localport; + return 0; + +out_ida_put: + ida_simple_remove(&nvme_fc_local_port_cnt, idx); +out_fail_kfree: + kfree(newrec); +out_reghost_failed: + *portptr = NULL; + + return ret; +} +EXPORT_SYMBOL_GPL(nvme_fc_register_localport); + +static void +nvme_fc_free_lport(struct kref *ref) +{ + struct nvme_fc_lport *lport = + container_of(ref, struct nvme_fc_lport, ref); + unsigned long flags; + + WARN_ON(lport->localport.port_state != FC_OBJSTATE_DELETED); + WARN_ON(!list_empty(&lport->endp_list)); + + /* remove from transport list */ + spin_lock_irqsave(&nvme_fc_lock, flags); + list_del(&lport->port_list); + spin_unlock_irqrestore(&nvme_fc_lock, flags); + + /* let the LLDD know we've finished tearing it down */ + lport->ops->localport_delete(&lport->localport); + + ida_simple_remove(&nvme_fc_local_port_cnt, lport->localport.port_num); + ida_destroy(&lport->endp_cnt); + + put_device(lport->dev); + + kfree(lport); +} + +static void +nvme_fc_lport_put(struct nvme_fc_lport *lport) +{ + kref_put(&lport->ref, nvme_fc_free_lport); +} + +static int +nvme_fc_lport_get(struct nvme_fc_lport *lport) +{ + return kref_get_unless_zero(&lport->ref); +} + +/** + * nvme_fc_unregister_localport - transport entry point called by an + * LLDD to deregister/remove a previously + * registered a NVME host FC port. + * @localport: pointer to the (registered) local port that is to be + * deregistered. + * + * Returns: + * a completion status. Must be 0 upon success; a negative errno + * (ex: -ENXIO) upon failure. + */ +int +nvme_fc_unregister_localport(struct nvme_fc_local_port *portptr) +{ + struct nvme_fc_lport *lport = localport_to_lport(portptr); + unsigned long flags; + + if (!portptr) + return -EINVAL; + + spin_lock_irqsave(&nvme_fc_lock, flags); + + if (portptr->port_state != FC_OBJSTATE_ONLINE) { + spin_unlock_irqrestore(&nvme_fc_lock, flags); + return -EINVAL; + } + portptr->port_state = FC_OBJSTATE_DELETED; + + spin_unlock_irqrestore(&nvme_fc_lock, flags); + + nvme_fc_lport_put(lport); + + return 0; +} +EXPORT_SYMBOL_GPL(nvme_fc_unregister_localport); + +/** + * nvme_fc_register_remoteport - transport entry point called by an + * LLDD to register the existence of a NVME + * subsystem FC port on its fabric. + * @localport: pointer to the (registered) local port that the remote + * subsystem port is connected to. + * @pinfo: pointer to information about the port to be registered + * @rport_p: pointer to a remote port pointer. Upon success, the routine + * will allocate a nvme_fc_remote_port structure and place its + * address in the remote port pointer. Upon failure, remote port + * pointer will be set to 0. + * + * Returns: + * a completion status. Must be 0 upon success; a negative errno + * (ex: -ENXIO) upon failure. + */ +int +nvme_fc_register_remoteport(struct nvme_fc_local_port *localport, + struct nvme_fc_port_info *pinfo, + struct nvme_fc_remote_port **portptr) +{ + struct nvme_fc_lport *lport = localport_to_lport(localport); + struct nvme_fc_rport *newrec; + unsigned long flags; + int ret, idx; + + newrec = kmalloc((sizeof(*newrec) + lport->ops->remote_priv_sz), + GFP_KERNEL); + if (!newrec) { + ret = -ENOMEM; + goto out_reghost_failed; + } + + if (!nvme_fc_lport_get(lport)) { + ret = -ESHUTDOWN; + goto out_kfree_rport; + } + + idx = ida_simple_get(&lport->endp_cnt, 0, 0, GFP_KERNEL); + if (idx < 0) { + ret = -ENOSPC; + goto out_lport_put; + } + + INIT_LIST_HEAD(&newrec->endp_list); + INIT_LIST_HEAD(&newrec->ctrl_list); + kref_init(&newrec->ref); + spin_lock_init(&newrec->lock); + newrec->remoteport.localport = &lport->localport; + newrec->remoteport.private = &newrec[1]; + newrec->remoteport.port_role = pinfo->port_role; + newrec->remoteport.node_name = pinfo->node_name; + newrec->remoteport.port_name = pinfo->port_name; + newrec->remoteport.port_id = pinfo->port_id; + newrec->remoteport.port_state = FC_OBJSTATE_ONLINE; + newrec->remoteport.port_num = idx; + + spin_lock_irqsave(&nvme_fc_lock, flags); + list_add_tail(&newrec->endp_list, &lport->endp_list); + spin_unlock_irqrestore(&nvme_fc_lock, flags); + + *portptr = &newrec->remoteport; + return 0; + +out_lport_put: + nvme_fc_lport_put(lport); +out_kfree_rport: + kfree(newrec); +out_reghost_failed: + *portptr = NULL; + return ret; + +} +EXPORT_SYMBOL_GPL(nvme_fc_register_remoteport); + +static void +nvme_fc_free_rport(struct kref *ref) +{ + struct nvme_fc_rport *rport = + container_of(ref, struct nvme_fc_rport, ref); + struct nvme_fc_lport *lport = + localport_to_lport(rport->remoteport.localport); + unsigned long flags; + + WARN_ON(rport->remoteport.port_state != FC_OBJSTATE_DELETED); + WARN_ON(!list_empty(&rport->ctrl_list)); + + /* remove from lport list */ + spin_lock_irqsave(&nvme_fc_lock, flags); + list_del(&rport->endp_list); + spin_unlock_irqrestore(&nvme_fc_lock, flags); + + /* let the LLDD know we've finished tearing it down */ + lport->ops->remoteport_delete(&rport->remoteport); + + ida_simple_remove(&lport->endp_cnt, rport->remoteport.port_num); + + kfree(rport); + + nvme_fc_lport_put(lport); +} + +static void +nvme_fc_rport_put(struct nvme_fc_rport *rport) +{ + kref_put(&rport->ref, nvme_fc_free_rport); +} + +static int +nvme_fc_rport_get(struct nvme_fc_rport *rport) +{ + return kref_get_unless_zero(&rport->ref); +} + +/** + * nvme_fc_unregister_remoteport - transport entry point called by an + * LLDD to deregister/remove a previously + * registered a NVME subsystem FC port. + * @remoteport: pointer to the (registered) remote port that is to be + * deregistered. + * + * Returns: + * a completion status. Must be 0 upon success; a negative errno + * (ex: -ENXIO) upon failure. + */ +int +nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *portptr) +{ + struct nvme_fc_rport *rport = remoteport_to_rport(portptr); + struct nvme_fc_ctrl *ctrl; + unsigned long flags; + + if (!portptr) + return -EINVAL; + + spin_lock_irqsave(&rport->lock, flags); + + if (portptr->port_state != FC_OBJSTATE_ONLINE) { + spin_unlock_irqrestore(&rport->lock, flags); + return -EINVAL; + } + portptr->port_state = FC_OBJSTATE_DELETED; + + /* tear down all associations to the remote port */ + list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) + __nvme_fc_del_ctrl(ctrl); + + spin_unlock_irqrestore(&rport->lock, flags); + + nvme_fc_rport_put(rport); + return 0; +} +EXPORT_SYMBOL_GPL(nvme_fc_unregister_remoteport); + + +/* *********************** FC-NVME DMA Handling **************************** */ + +/* + * The fcloop device passes in a NULL device pointer. Real LLD's will + * pass in a valid device pointer. If NULL is passed to the dma mapping + * routines, depending on the platform, it may or may not succeed, and + * may crash. + * + * As such: + * Wrapper all the dma routines and check the dev pointer. + * + * If simple mappings (return just a dma address, we'll noop them, + * returning a dma address of 0. + * + * On more complex mappings (dma_map_sg), a pseudo routine fills + * in the scatter list, setting all dma addresses to 0. + */ + +static inline dma_addr_t +fc_dma_map_single(struct device *dev, void *ptr, size_t size, + enum dma_data_direction dir) +{ + return dev ? dma_map_single(dev, ptr, size, dir) : (dma_addr_t)0L; +} + +static inline int +fc_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dev ? dma_mapping_error(dev, dma_addr) : 0; +} + +static inline void +fc_dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ + if (dev) + dma_unmap_single(dev, addr, size, dir); +} + +static inline void +fc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ + if (dev) + dma_sync_single_for_cpu(dev, addr, size, dir); +} + +static inline void +fc_dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ + if (dev) + dma_sync_single_for_device(dev, addr, size, dir); +} + +/* pseudo dma_map_sg call */ +static int +fc_map_sg(struct scatterlist *sg, int nents) +{ + struct scatterlist *s; + int i; + + WARN_ON(nents == 0 || sg[0].length == 0); + + for_each_sg(sg, s, nents, i) { + s->dma_address = 0L; +#ifdef CONFIG_NEED_SG_DMA_LENGTH + s->dma_length = s->length; +#endif + } + return nents; +} + +static inline int +fc_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir) +{ + return dev ? dma_map_sg(dev, sg, nents, dir) : fc_map_sg(sg, nents); +} + +static inline void +fc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir) +{ + if (dev) + dma_unmap_sg(dev, sg, nents, dir); +} + + +/* *********************** FC-NVME LS Handling **************************** */ + +static void nvme_fc_ctrl_put(struct nvme_fc_ctrl *); +static int nvme_fc_ctrl_get(struct nvme_fc_ctrl *); + + +static void +__nvme_fc_finish_ls_req(struct nvme_fc_ctrl *ctrl, + struct nvmefc_ls_req_op *lsop) +{ + struct nvmefc_ls_req *lsreq = &lsop->ls_req; + unsigned long flags; + + spin_lock_irqsave(&ctrl->lock, flags); + + if (!lsop->req_queued) { + spin_unlock_irqrestore(&ctrl->lock, flags); + return; + } + + list_del(&lsop->lsreq_list); + + lsop->req_queued = false; + + spin_unlock_irqrestore(&ctrl->lock, flags); + + fc_dma_unmap_single(ctrl->dev, lsreq->rqstdma, + (lsreq->rqstlen + lsreq->rsplen), + DMA_BIDIRECTIONAL); + + nvme_fc_ctrl_put(ctrl); +} + +static int +__nvme_fc_send_ls_req(struct nvme_fc_ctrl *ctrl, + struct nvmefc_ls_req_op *lsop, + void (*done)(struct nvmefc_ls_req *req, int status)) +{ + struct nvmefc_ls_req *lsreq = &lsop->ls_req; + unsigned long flags; + int ret; + + if (!nvme_fc_ctrl_get(ctrl)) + return -ESHUTDOWN; + + lsreq->done = done; + lsop->ctrl = ctrl; + lsop->req_queued = false; + INIT_LIST_HEAD(&lsop->lsreq_list); + init_completion(&lsop->ls_done); + + lsreq->rqstdma = fc_dma_map_single(ctrl->dev, lsreq->rqstaddr, + lsreq->rqstlen + lsreq->rsplen, + DMA_BIDIRECTIONAL); + if (fc_dma_mapping_error(ctrl->dev, lsreq->rqstdma)) { + nvme_fc_ctrl_put(ctrl); + dev_err(ctrl->dev, + "els request command failed EFAULT.\n"); + return -EFAULT; + } + lsreq->rspdma = lsreq->rqstdma + lsreq->rqstlen; + + spin_lock_irqsave(&ctrl->lock, flags); + + list_add_tail(&lsop->lsreq_list, &ctrl->ls_req_list); + + lsop->req_queued = true; + + spin_unlock_irqrestore(&ctrl->lock, flags); + + ret = ctrl->lport->ops->ls_req(&ctrl->lport->localport, + &ctrl->rport->remoteport, lsreq); + if (ret) + lsop->ls_error = ret; + + return ret; +} + +static void +nvme_fc_send_ls_req_done(struct nvmefc_ls_req *lsreq, int status) +{ + struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); + + lsop->ls_error = status; + complete(&lsop->ls_done); +} + +static int +nvme_fc_send_ls_req(struct nvme_fc_ctrl *ctrl, struct nvmefc_ls_req_op *lsop) +{ + struct nvmefc_ls_req *lsreq = &lsop->ls_req; + struct fcnvme_ls_rjt *rjt = lsreq->rspaddr; + int ret; + + ret = __nvme_fc_send_ls_req(ctrl, lsop, nvme_fc_send_ls_req_done); + + if (!ret) + /* + * No timeout/not interruptible as we need the struct + * to exist until the lldd calls us back. Thus mandate + * wait until driver calls back. lldd responsible for + * the timeout action + */ + wait_for_completion(&lsop->ls_done); + + __nvme_fc_finish_ls_req(ctrl, lsop); + + if (ret) { + dev_err(ctrl->dev, + "ls request command failed (%d).\n", ret); + return ret; + } + + /* ACC or RJT payload ? */ + if (rjt->w0.ls_cmd == FCNVME_LS_RJT) + return -ENXIO; + + return 0; +} + +static void +nvme_fc_send_ls_req_async(struct nvme_fc_ctrl *ctrl, + struct nvmefc_ls_req_op *lsop, + void (*done)(struct nvmefc_ls_req *req, int status)) +{ + int ret; + + ret = __nvme_fc_send_ls_req(ctrl, lsop, done); + + /* don't wait for completion */ + + if (ret) + done(&lsop->ls_req, ret); +} + +/* Validation Error indexes into the string table below */ +enum { + VERR_NO_ERROR = 0, + VERR_LSACC = 1, + VERR_LSDESC_RQST = 2, + VERR_LSDESC_RQST_LEN = 3, + VERR_ASSOC_ID = 4, + VERR_ASSOC_ID_LEN = 5, + VERR_CONN_ID = 6, + VERR_CONN_ID_LEN = 7, + VERR_CR_ASSOC = 8, + VERR_CR_ASSOC_ACC_LEN = 9, + VERR_CR_CONN = 10, + VERR_CR_CONN_ACC_LEN = 11, + VERR_DISCONN = 12, + VERR_DISCONN_ACC_LEN = 13, +}; + +static char *validation_errors[] = { + "OK", + "Not LS_ACC", + "Not LSDESC_RQST", + "Bad LSDESC_RQST Length", + "Not Association ID", + "Bad Association ID Length", + "Not Connection ID", + "Bad Connection ID Length", + "Not CR_ASSOC Rqst", + "Bad CR_ASSOC ACC Length", + "Not CR_CONN Rqst", + "Bad CR_CONN ACC Length", + "Not Disconnect Rqst", + "Bad Disconnect ACC Length", +}; + +static int +nvme_fc_connect_admin_queue(struct nvme_fc_ctrl *ctrl, + struct nvme_fc_queue *queue, u16 qsize, u16 ersp_ratio) +{ + struct nvmefc_ls_req_op *lsop; + struct nvmefc_ls_req *lsreq; + struct fcnvme_ls_cr_assoc_rqst *assoc_rqst; + struct fcnvme_ls_cr_assoc_acc *assoc_acc; + int ret, fcret = 0; + + lsop = kzalloc((sizeof(*lsop) + + ctrl->lport->ops->lsrqst_priv_sz + + sizeof(*assoc_rqst) + sizeof(*assoc_acc)), GFP_KERNEL); + if (!lsop) { + ret = -ENOMEM; + goto out_no_memory; + } + lsreq = &lsop->ls_req; + + lsreq->private = (void *)&lsop[1]; + assoc_rqst = (struct fcnvme_ls_cr_assoc_rqst *) + (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); + assoc_acc = (struct fcnvme_ls_cr_assoc_acc *)&assoc_rqst[1]; + + assoc_rqst->w0.ls_cmd = FCNVME_LS_CREATE_ASSOCIATION; + assoc_rqst->desc_list_len = + cpu_to_be32(sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); + + assoc_rqst->assoc_cmd.desc_tag = + cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD); + assoc_rqst->assoc_cmd.desc_len = + fcnvme_lsdesc_len( + sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)); + + assoc_rqst->assoc_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); + assoc_rqst->assoc_cmd.sqsize = cpu_to_be16(qsize); + /* Linux supports only Dynamic controllers */ + assoc_rqst->assoc_cmd.cntlid = cpu_to_be16(0xffff); + memcpy(&assoc_rqst->assoc_cmd.hostid, &ctrl->ctrl.opts->host->id, + min_t(size_t, FCNVME_ASSOC_HOSTID_LEN, sizeof(uuid_be))); + strncpy(assoc_rqst->assoc_cmd.hostnqn, ctrl->ctrl.opts->host->nqn, + min(FCNVME_ASSOC_HOSTNQN_LEN, NVMF_NQN_SIZE)); + strncpy(assoc_rqst->assoc_cmd.subnqn, ctrl->ctrl.opts->subsysnqn, + min(FCNVME_ASSOC_SUBNQN_LEN, NVMF_NQN_SIZE)); + + lsop->queue = queue; + lsreq->rqstaddr = assoc_rqst; + lsreq->rqstlen = sizeof(*assoc_rqst); + lsreq->rspaddr = assoc_acc; + lsreq->rsplen = sizeof(*assoc_acc); + lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; + + ret = nvme_fc_send_ls_req(ctrl, lsop); + if (ret) + goto out_free_buffer; + + /* process connect LS completion */ + + /* validate the ACC response */ + if (assoc_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) + fcret = VERR_LSACC; + if (assoc_acc->hdr.desc_list_len != + fcnvme_lsdesc_len( + sizeof(struct fcnvme_ls_cr_assoc_acc))) + fcret = VERR_CR_ASSOC_ACC_LEN; + if (assoc_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) + fcret = VERR_LSDESC_RQST; + else if (assoc_acc->hdr.rqst.desc_len != + fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) + fcret = VERR_LSDESC_RQST_LEN; + else if (assoc_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_ASSOCIATION) + fcret = VERR_CR_ASSOC; + else if (assoc_acc->associd.desc_tag != + cpu_to_be32(FCNVME_LSDESC_ASSOC_ID)) + fcret = VERR_ASSOC_ID; + else if (assoc_acc->associd.desc_len != + fcnvme_lsdesc_len( + sizeof(struct fcnvme_lsdesc_assoc_id))) + fcret = VERR_ASSOC_ID_LEN; + else if (assoc_acc->connectid.desc_tag != + cpu_to_be32(FCNVME_LSDESC_CONN_ID)) + fcret = VERR_CONN_ID; + else if (assoc_acc->connectid.desc_len != + fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) + fcret = VERR_CONN_ID_LEN; + + if (fcret) { + ret = -EBADF; + dev_err(ctrl->dev, + "q %d connect failed: %s\n", + queue->qnum, validation_errors[fcret]); + } else { + ctrl->association_id = + be64_to_cpu(assoc_acc->associd.association_id); + queue->connection_id = + be64_to_cpu(assoc_acc->connectid.connection_id); + set_bit(NVME_FC_Q_CONNECTED, &queue->flags); + } + +out_free_buffer: + kfree(lsop); +out_no_memory: + if (ret) + dev_err(ctrl->dev, + "queue %d connect admin queue failed (%d).\n", + queue->qnum, ret); + return ret; +} + +static int +nvme_fc_connect_queue(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, + u16 qsize, u16 ersp_ratio) +{ + struct nvmefc_ls_req_op *lsop; + struct nvmefc_ls_req *lsreq; + struct fcnvme_ls_cr_conn_rqst *conn_rqst; + struct fcnvme_ls_cr_conn_acc *conn_acc; + int ret, fcret = 0; + + lsop = kzalloc((sizeof(*lsop) + + ctrl->lport->ops->lsrqst_priv_sz + + sizeof(*conn_rqst) + sizeof(*conn_acc)), GFP_KERNEL); + if (!lsop) { + ret = -ENOMEM; + goto out_no_memory; + } + lsreq = &lsop->ls_req; + + lsreq->private = (void *)&lsop[1]; + conn_rqst = (struct fcnvme_ls_cr_conn_rqst *) + (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); + conn_acc = (struct fcnvme_ls_cr_conn_acc *)&conn_rqst[1]; + + conn_rqst->w0.ls_cmd = FCNVME_LS_CREATE_CONNECTION; + conn_rqst->desc_list_len = cpu_to_be32( + sizeof(struct fcnvme_lsdesc_assoc_id) + + sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); + + conn_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); + conn_rqst->associd.desc_len = + fcnvme_lsdesc_len( + sizeof(struct fcnvme_lsdesc_assoc_id)); + conn_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); + conn_rqst->connect_cmd.desc_tag = + cpu_to_be32(FCNVME_LSDESC_CREATE_CONN_CMD); + conn_rqst->connect_cmd.desc_len = + fcnvme_lsdesc_len( + sizeof(struct fcnvme_lsdesc_cr_conn_cmd)); + conn_rqst->connect_cmd.ersp_ratio = cpu_to_be16(ersp_ratio); + conn_rqst->connect_cmd.qid = cpu_to_be16(queue->qnum); + conn_rqst->connect_cmd.sqsize = cpu_to_be16(qsize); + + lsop->queue = queue; + lsreq->rqstaddr = conn_rqst; + lsreq->rqstlen = sizeof(*conn_rqst); + lsreq->rspaddr = conn_acc; + lsreq->rsplen = sizeof(*conn_acc); + lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; + + ret = nvme_fc_send_ls_req(ctrl, lsop); + if (ret) + goto out_free_buffer; + + /* process connect LS completion */ + + /* validate the ACC response */ + if (conn_acc->hdr.w0.ls_cmd != FCNVME_LS_ACC) + fcret = VERR_LSACC; + if (conn_acc->hdr.desc_list_len != + fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_cr_conn_acc))) + fcret = VERR_CR_CONN_ACC_LEN; + if (conn_acc->hdr.rqst.desc_tag != cpu_to_be32(FCNVME_LSDESC_RQST)) + fcret = VERR_LSDESC_RQST; + else if (conn_acc->hdr.rqst.desc_len != + fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst))) + fcret = VERR_LSDESC_RQST_LEN; + else if (conn_acc->hdr.rqst.w0.ls_cmd != FCNVME_LS_CREATE_CONNECTION) + fcret = VERR_CR_CONN; + else if (conn_acc->connectid.desc_tag != + cpu_to_be32(FCNVME_LSDESC_CONN_ID)) + fcret = VERR_CONN_ID; + else if (conn_acc->connectid.desc_len != + fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_conn_id))) + fcret = VERR_CONN_ID_LEN; + + if (fcret) { + ret = -EBADF; + dev_err(ctrl->dev, + "q %d connect failed: %s\n", + queue->qnum, validation_errors[fcret]); + } else { + queue->connection_id = + be64_to_cpu(conn_acc->connectid.connection_id); + set_bit(NVME_FC_Q_CONNECTED, &queue->flags); + } + +out_free_buffer: + kfree(lsop); +out_no_memory: + if (ret) + dev_err(ctrl->dev, + "queue %d connect command failed (%d).\n", + queue->qnum, ret); + return ret; +} + +static void +nvme_fc_disconnect_assoc_done(struct nvmefc_ls_req *lsreq, int status) +{ + struct nvmefc_ls_req_op *lsop = ls_req_to_lsop(lsreq); + struct nvme_fc_ctrl *ctrl = lsop->ctrl; + + __nvme_fc_finish_ls_req(ctrl, lsop); + + if (status) + dev_err(ctrl->dev, + "disconnect assoc ls request command failed (%d).\n", + status); + + /* fc-nvme iniator doesn't care about success or failure of cmd */ + + kfree(lsop); +} + +/* + * This routine sends a FC-NVME LS to disconnect (aka terminate) + * the FC-NVME Association. Terminating the association also + * terminates the FC-NVME connections (per queue, both admin and io + * queues) that are part of the association. E.g. things are torn + * down, and the related FC-NVME Association ID and Connection IDs + * become invalid. + * + * The behavior of the fc-nvme initiator is such that it's + * understanding of the association and connections will implicitly + * be torn down. The action is implicit as it may be due to a loss of + * connectivity with the fc-nvme target, so you may never get a + * response even if you tried. As such, the action of this routine + * is to asynchronously send the LS, ignore any results of the LS, and + * continue on with terminating the association. If the fc-nvme target + * is present and receives the LS, it too can tear down. + */ +static void +nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl) +{ + struct fcnvme_ls_disconnect_rqst *discon_rqst; + struct fcnvme_ls_disconnect_acc *discon_acc; + struct nvmefc_ls_req_op *lsop; + struct nvmefc_ls_req *lsreq; + + lsop = kzalloc((sizeof(*lsop) + + ctrl->lport->ops->lsrqst_priv_sz + + sizeof(*discon_rqst) + sizeof(*discon_acc)), + GFP_KERNEL); + if (!lsop) + /* couldn't sent it... too bad */ + return; + + lsreq = &lsop->ls_req; + + lsreq->private = (void *)&lsop[1]; + discon_rqst = (struct fcnvme_ls_disconnect_rqst *) + (lsreq->private + ctrl->lport->ops->lsrqst_priv_sz); + discon_acc = (struct fcnvme_ls_disconnect_acc *)&discon_rqst[1]; + + discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT; + discon_rqst->desc_list_len = cpu_to_be32( + sizeof(struct fcnvme_lsdesc_assoc_id) + + sizeof(struct fcnvme_lsdesc_disconn_cmd)); + + discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID); + discon_rqst->associd.desc_len = + fcnvme_lsdesc_len( + sizeof(struct fcnvme_lsdesc_assoc_id)); + + discon_rqst->associd.association_id = cpu_to_be64(ctrl->association_id); + + discon_rqst->discon_cmd.desc_tag = cpu_to_be32( + FCNVME_LSDESC_DISCONN_CMD); + discon_rqst->discon_cmd.desc_len = + fcnvme_lsdesc_len( + sizeof(struct fcnvme_lsdesc_disconn_cmd)); + discon_rqst->discon_cmd.scope = FCNVME_DISCONN_ASSOCIATION; + discon_rqst->discon_cmd.id = cpu_to_be64(ctrl->association_id); + + lsreq->rqstaddr = discon_rqst; + lsreq->rqstlen = sizeof(*discon_rqst); + lsreq->rspaddr = discon_acc; + lsreq->rsplen = sizeof(*discon_acc); + lsreq->timeout = NVME_FC_CONNECT_TIMEOUT_SEC; + + nvme_fc_send_ls_req_async(ctrl, lsop, nvme_fc_disconnect_assoc_done); + + /* only meaningful part to terminating the association */ + ctrl->association_id = 0; +} + + +/* *********************** NVME Ctrl Routines **************************** */ + + +static int +nvme_fc_reinit_request(void *data, struct request *rq) +{ + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); + struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; + + memset(cmdiu, 0, sizeof(*cmdiu)); + cmdiu->scsi_id = NVME_CMD_SCSI_ID; + cmdiu->fc_id = NVME_CMD_FC_ID; + cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); + memset(&op->rsp_iu, 0, sizeof(op->rsp_iu)); + + return 0; +} + +static void +__nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl, + struct nvme_fc_fcp_op *op) +{ + fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.rspdma, + sizeof(op->rsp_iu), DMA_FROM_DEVICE); + fc_dma_unmap_single(ctrl->lport->dev, op->fcp_req.cmddma, + sizeof(op->cmd_iu), DMA_TO_DEVICE); + + atomic_set(&op->state, FCPOP_STATE_UNINIT); +} + +static void +nvme_fc_exit_request(void *data, struct request *rq, + unsigned int hctx_idx, unsigned int rq_idx) +{ + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); + + return __nvme_fc_exit_request(data, op); +} + +static void +nvme_fc_exit_aen_ops(struct nvme_fc_ctrl *ctrl) +{ + struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops; + int i; + + for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { + if (atomic_read(&aen_op->state) == FCPOP_STATE_UNINIT) + continue; + __nvme_fc_exit_request(ctrl, aen_op); + nvme_fc_ctrl_put(ctrl); + } +} + +void +nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) +{ + struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req); + struct request *rq = op->rq; + struct nvmefc_fcp_req *freq = &op->fcp_req; + struct nvme_fc_ctrl *ctrl = op->ctrl; + struct nvme_fc_queue *queue = op->queue; + struct nvme_completion *cqe = &op->rsp_iu.cqe; + u16 status; + + /* + * WARNING: + * The current linux implementation of a nvme controller + * allocates a single tag set for all io queues and sizes + * the io queues to fully hold all possible tags. Thus, the + * implementation does not reference or care about the sqhd + * value as it never needs to use the sqhd/sqtail pointers + * for submission pacing. + * + * This affects the FC-NVME implementation in two ways: + * 1) As the value doesn't matter, we don't need to waste + * cycles extracting it from ERSPs and stamping it in the + * cases where the transport fabricates CQEs on successful + * completions. + * 2) The FC-NVME implementation requires that delivery of + * ERSP completions are to go back to the nvme layer in order + * relative to the rsn, such that the sqhd value will always + * be "in order" for the nvme layer. As the nvme layer in + * linux doesn't care about sqhd, there's no need to return + * them in order. + * + * Additionally: + * As the core nvme layer in linux currently does not look at + * every field in the cqe - in cases where the FC transport must + * fabricate a CQE, the following fields will not be set as they + * are not referenced: + * cqe.sqid, cqe.sqhd, cqe.command_id + */ + + fc_dma_sync_single_for_cpu(ctrl->lport->dev, op->fcp_req.rspdma, + sizeof(op->rsp_iu), DMA_FROM_DEVICE); + + if (atomic_read(&op->state) == FCPOP_STATE_ABORTED) + status = NVME_SC_ABORT_REQ | NVME_SC_DNR; + else + status = freq->status; + + /* + * For the linux implementation, if we have an unsuccesful + * status, they blk-mq layer can typically be called with the + * non-zero status and the content of the cqe isn't important. + */ + if (status) + goto done; + + /* + * command completed successfully relative to the wire + * protocol. However, validate anything received and + * extract the status and result from the cqe (create it + * where necessary). + */ + + switch (freq->rcv_rsplen) { + + case 0: + case NVME_FC_SIZEOF_ZEROS_RSP: + /* + * No response payload or 12 bytes of payload (which + * should all be zeros) are considered successful and + * no payload in the CQE by the transport. + */ + if (freq->transferred_length != + be32_to_cpu(op->cmd_iu.data_len)) { + status = -EIO; + goto done; + } + op->nreq.result.u64 = 0; + break; + + case sizeof(struct nvme_fc_ersp_iu): + /* + * The ERSP IU contains a full completion with CQE. + * Validate ERSP IU and look at cqe. + */ + if (unlikely(be16_to_cpu(op->rsp_iu.iu_len) != + (freq->rcv_rsplen / 4) || + be32_to_cpu(op->rsp_iu.xfrd_len) != + freq->transferred_length || + op->rqno != le16_to_cpu(cqe->command_id))) { + status = -EIO; + goto done; + } + op->nreq.result = cqe->result; + status = le16_to_cpu(cqe->status) >> 1; + break; + + default: + status = -EIO; + goto done; + } + +done: + if (!queue->qnum && op->rqno >= AEN_CMDID_BASE) { + nvme_complete_async_event(&queue->ctrl->ctrl, status, + &op->nreq.result); + nvme_fc_ctrl_put(ctrl); + return; + } + + blk_mq_complete_request(rq, status); +} + +static int +__nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, + struct nvme_fc_queue *queue, struct nvme_fc_fcp_op *op, + struct request *rq, u32 rqno) +{ + struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; + int ret = 0; + + memset(op, 0, sizeof(*op)); + op->fcp_req.cmdaddr = &op->cmd_iu; + op->fcp_req.cmdlen = sizeof(op->cmd_iu); + op->fcp_req.rspaddr = &op->rsp_iu; + op->fcp_req.rsplen = sizeof(op->rsp_iu); + op->fcp_req.done = nvme_fc_fcpio_done; + op->fcp_req.first_sgl = (struct scatterlist *)&op[1]; + op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; + op->ctrl = ctrl; + op->queue = queue; + op->rq = rq; + op->rqno = rqno; + + cmdiu->scsi_id = NVME_CMD_SCSI_ID; + cmdiu->fc_id = NVME_CMD_FC_ID; + cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32)); + + op->fcp_req.cmddma = fc_dma_map_single(ctrl->lport->dev, + &op->cmd_iu, sizeof(op->cmd_iu), DMA_TO_DEVICE); + if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) { + dev_err(ctrl->dev, + "FCP Op failed - cmdiu dma mapping failed.\n"); + ret = EFAULT; + goto out_on_error; + } + + op->fcp_req.rspdma = fc_dma_map_single(ctrl->lport->dev, + &op->rsp_iu, sizeof(op->rsp_iu), + DMA_FROM_DEVICE); + if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) { + dev_err(ctrl->dev, + "FCP Op failed - rspiu dma mapping failed.\n"); + ret = EFAULT; + } + + atomic_set(&op->state, FCPOP_STATE_IDLE); +out_on_error: + return ret; +} + +static int +nvme_fc_init_request(void *data, struct request *rq, + unsigned int hctx_idx, unsigned int rq_idx, + unsigned int numa_node) +{ + struct nvme_fc_ctrl *ctrl = data; + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); + struct nvme_fc_queue *queue = &ctrl->queues[hctx_idx+1]; + + return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); +} + +static int +nvme_fc_init_admin_request(void *data, struct request *rq, + unsigned int hctx_idx, unsigned int rq_idx, + unsigned int numa_node) +{ + struct nvme_fc_ctrl *ctrl = data; + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); + struct nvme_fc_queue *queue = &ctrl->queues[0]; + + return __nvme_fc_init_request(ctrl, queue, op, rq, queue->rqcnt++); +} + +static int +nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) +{ + struct nvme_fc_fcp_op *aen_op; + struct nvme_fc_cmd_iu *cmdiu; + struct nvme_command *sqe; + int i, ret; + + aen_op = ctrl->aen_ops; + for (i = 0; i < NVME_FC_NR_AEN_COMMANDS; i++, aen_op++) { + cmdiu = &aen_op->cmd_iu; + sqe = &cmdiu->sqe; + ret = __nvme_fc_init_request(ctrl, &ctrl->queues[0], + aen_op, (struct request *)NULL, + (AEN_CMDID_BASE + i)); + if (ret) + return ret; + + memset(sqe, 0, sizeof(*sqe)); + sqe->common.opcode = nvme_admin_async_event; + sqe->common.command_id = AEN_CMDID_BASE + i; + } + return 0; +} + + +static inline void +__nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, struct nvme_fc_ctrl *ctrl, + unsigned int qidx) +{ + struct nvme_fc_queue *queue = &ctrl->queues[qidx]; + + hctx->driver_data = queue; + queue->hctx = hctx; +} + +static int +nvme_fc_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, + unsigned int hctx_idx) +{ + struct nvme_fc_ctrl *ctrl = data; + + __nvme_fc_init_hctx(hctx, ctrl, hctx_idx + 1); + + return 0; +} + +static int +nvme_fc_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, + unsigned int hctx_idx) +{ + struct nvme_fc_ctrl *ctrl = data; + + __nvme_fc_init_hctx(hctx, ctrl, hctx_idx); + + return 0; +} + +static void +nvme_fc_init_queue(struct nvme_fc_ctrl *ctrl, int idx, size_t queue_size) +{ + struct nvme_fc_queue *queue; + + queue = &ctrl->queues[idx]; + memset(queue, 0, sizeof(*queue)); + queue->ctrl = ctrl; + queue->qnum = idx; + atomic_set(&queue->csn, 1); + queue->dev = ctrl->dev; + + if (idx > 0) + queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; + else + queue->cmnd_capsule_len = sizeof(struct nvme_command); + + queue->queue_size = queue_size; + + /* + * Considered whether we should allocate buffers for all SQEs + * and CQEs and dma map them - mapping their respective entries + * into the request structures (kernel vm addr and dma address) + * thus the driver could use the buffers/mappings directly. + * It only makes sense if the LLDD would use them for its + * messaging api. It's very unlikely most adapter api's would use + * a native NVME sqe/cqe. More reasonable if FC-NVME IU payload + * structures were used instead. + */ +} + +/* + * This routine terminates a queue at the transport level. + * The transport has already ensured that all outstanding ios on + * the queue have been terminated. + * The transport will send a Disconnect LS request to terminate + * the queue's connection. Termination of the admin queue will also + * terminate the association at the target. + */ +static void +nvme_fc_free_queue(struct nvme_fc_queue *queue) +{ + if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags)) + return; + + /* + * Current implementation never disconnects a single queue. + * It always terminates a whole association. So there is never + * a disconnect(queue) LS sent to the target. + */ + + queue->connection_id = 0; + clear_bit(NVME_FC_Q_CONNECTED, &queue->flags); +} + +static void +__nvme_fc_delete_hw_queue(struct nvme_fc_ctrl *ctrl, + struct nvme_fc_queue *queue, unsigned int qidx) +{ + if (ctrl->lport->ops->delete_queue) + ctrl->lport->ops->delete_queue(&ctrl->lport->localport, qidx, + queue->lldd_handle); + queue->lldd_handle = NULL; +} + +static void +nvme_fc_destroy_admin_queue(struct nvme_fc_ctrl *ctrl) +{ + __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); + blk_cleanup_queue(ctrl->ctrl.admin_q); + blk_mq_free_tag_set(&ctrl->admin_tag_set); + nvme_fc_free_queue(&ctrl->queues[0]); +} + +static void +nvme_fc_free_io_queues(struct nvme_fc_ctrl *ctrl) +{ + int i; + + for (i = 1; i < ctrl->queue_count; i++) + nvme_fc_free_queue(&ctrl->queues[i]); +} + +static int +__nvme_fc_create_hw_queue(struct nvme_fc_ctrl *ctrl, + struct nvme_fc_queue *queue, unsigned int qidx, u16 qsize) +{ + int ret = 0; + + queue->lldd_handle = NULL; + if (ctrl->lport->ops->create_queue) + ret = ctrl->lport->ops->create_queue(&ctrl->lport->localport, + qidx, qsize, &queue->lldd_handle); + + return ret; +} + +static void +nvme_fc_delete_hw_io_queues(struct nvme_fc_ctrl *ctrl) +{ + struct nvme_fc_queue *queue = &ctrl->queues[ctrl->queue_count - 1]; + int i; + + for (i = ctrl->queue_count - 1; i >= 1; i--, queue--) + __nvme_fc_delete_hw_queue(ctrl, queue, i); +} + +static int +nvme_fc_create_hw_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) +{ + struct nvme_fc_queue *queue = &ctrl->queues[1]; + int i, j, ret; + + for (i = 1; i < ctrl->queue_count; i++, queue++) { + ret = __nvme_fc_create_hw_queue(ctrl, queue, i, qsize); + if (ret) { + for (j = i-1; j >= 0; j--) + __nvme_fc_delete_hw_queue(ctrl, + &ctrl->queues[j], j); + return ret; + } + } + + return 0; +} + +static int +nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize) +{ + int i, ret = 0; + + for (i = 1; i < ctrl->queue_count; i++) { + ret = nvme_fc_connect_queue(ctrl, &ctrl->queues[i], qsize, + (qsize / 5)); + if (ret) + break; + ret = nvmf_connect_io_queue(&ctrl->ctrl, i); + if (ret) + break; + } + + return ret; +} + +static void +nvme_fc_init_io_queues(struct nvme_fc_ctrl *ctrl) +{ + int i; + + for (i = 1; i < ctrl->queue_count; i++) + nvme_fc_init_queue(ctrl, i, ctrl->ctrl.sqsize); +} + +static void +nvme_fc_ctrl_free(struct kref *ref) +{ + struct nvme_fc_ctrl *ctrl = + container_of(ref, struct nvme_fc_ctrl, ref); + unsigned long flags; + + if (ctrl->state != FCCTRL_INIT) { + /* remove from rport list */ + spin_lock_irqsave(&ctrl->rport->lock, flags); + list_del(&ctrl->ctrl_list); + spin_unlock_irqrestore(&ctrl->rport->lock, flags); + } + + put_device(ctrl->dev); + nvme_fc_rport_put(ctrl->rport); + + kfree(ctrl->queues); + ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); + nvmf_free_options(ctrl->ctrl.opts); + kfree(ctrl); +} + +static void +nvme_fc_ctrl_put(struct nvme_fc_ctrl *ctrl) +{ + kref_put(&ctrl->ref, nvme_fc_ctrl_free); +} + +static int +nvme_fc_ctrl_get(struct nvme_fc_ctrl *ctrl) +{ + return kref_get_unless_zero(&ctrl->ref); +} + +/* + * All accesses from nvme core layer done - can now free the + * controller. Called after last nvme_put_ctrl() call + */ +static void +nvme_fc_free_nvme_ctrl(struct nvme_ctrl *nctrl) +{ + struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); + + WARN_ON(nctrl != &ctrl->ctrl); + + /* + * Tear down the association, which will generate link + * traffic to terminate connections + */ + + if (ctrl->state != FCCTRL_INIT) { + /* send a Disconnect(association) LS to fc-nvme target */ + nvme_fc_xmt_disconnect_assoc(ctrl); + + if (ctrl->ctrl.tagset) { + blk_cleanup_queue(ctrl->ctrl.connect_q); + blk_mq_free_tag_set(&ctrl->tag_set); + nvme_fc_delete_hw_io_queues(ctrl); + nvme_fc_free_io_queues(ctrl); + } + + nvme_fc_exit_aen_ops(ctrl); + + nvme_fc_destroy_admin_queue(ctrl); + } + + nvme_fc_ctrl_put(ctrl); +} + + +static int +__nvme_fc_abort_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_fcp_op *op) +{ + int state; + + state = atomic_xchg(&op->state, FCPOP_STATE_ABORTED); + if (state != FCPOP_STATE_ACTIVE) { + atomic_set(&op->state, state); + return -ECANCELED; /* fail */ + } + + ctrl->lport->ops->fcp_abort(&ctrl->lport->localport, + &ctrl->rport->remoteport, + op->queue->lldd_handle, + &op->fcp_req); + + return 0; +} + +enum blk_eh_timer_return +nvme_fc_timeout(struct request *rq, bool reserved) +{ + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); + struct nvme_fc_ctrl *ctrl = op->ctrl; + int ret; + + if (reserved) + return BLK_EH_RESET_TIMER; + + ret = __nvme_fc_abort_op(ctrl, op); + if (ret) + /* io wasn't active to abort consider it done */ + return BLK_EH_HANDLED; + + /* + * TODO: force a controller reset + * when that happens, queues will be torn down and outstanding + * ios will be terminated, and the above abort, on a single io + * will no longer be needed. + */ + + return BLK_EH_HANDLED; +} + +static int +nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq, + struct nvme_fc_fcp_op *op) +{ + struct nvmefc_fcp_req *freq = &op->fcp_req; + u32 map_len = nvme_map_len(rq); + enum dma_data_direction dir; + int ret; + + freq->sg_cnt = 0; + + if (!map_len) + return 0; + + freq->sg_table.sgl = freq->first_sgl; + ret = sg_alloc_table_chained(&freq->sg_table, rq->nr_phys_segments, + freq->sg_table.sgl); + if (ret) + return -ENOMEM; + + op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl); + WARN_ON(op->nents > rq->nr_phys_segments); + dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; + freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl, + op->nents, dir); + if (unlikely(freq->sg_cnt <= 0)) { + sg_free_table_chained(&freq->sg_table, true); + freq->sg_cnt = 0; + return -EFAULT; + } + + /* + * TODO: blk_integrity_rq(rq) for DIF + */ + return 0; +} + +static void +nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq, + struct nvme_fc_fcp_op *op) +{ + struct nvmefc_fcp_req *freq = &op->fcp_req; + + if (!freq->sg_cnt) + return; + + fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents, + ((rq_data_dir(rq) == WRITE) ? + DMA_TO_DEVICE : DMA_FROM_DEVICE)); + + nvme_cleanup_cmd(rq); + + sg_free_table_chained(&freq->sg_table, true); + + freq->sg_cnt = 0; +} + +/* + * In FC, the queue is a logical thing. At transport connect, the target + * creates its "queue" and returns a handle that is to be given to the + * target whenever it posts something to the corresponding SQ. When an + * SQE is sent on a SQ, FC effectively considers the SQE, or rather the + * command contained within the SQE, an io, and assigns a FC exchange + * to it. The SQE and the associated SQ handle are sent in the initial + * CMD IU sents on the exchange. All transfers relative to the io occur + * as part of the exchange. The CQE is the last thing for the io, + * which is transferred (explicitly or implicitly) with the RSP IU + * sent on the exchange. After the CQE is received, the FC exchange is + * terminaed and the Exchange may be used on a different io. + * + * The transport to LLDD api has the transport making a request for a + * new fcp io request to the LLDD. The LLDD then allocates a FC exchange + * resource and transfers the command. The LLDD will then process all + * steps to complete the io. Upon completion, the transport done routine + * is called. + * + * So - while the operation is outstanding to the LLDD, there is a link + * level FC exchange resource that is also outstanding. This must be + * considered in all cleanup operations. + */ +static int +nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue, + struct nvme_fc_fcp_op *op, u32 data_len, + enum nvmefc_fcp_datadir io_dir) +{ + struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; + struct nvme_command *sqe = &cmdiu->sqe; + u32 csn; + int ret; + + if (!nvme_fc_ctrl_get(ctrl)) + return BLK_MQ_RQ_QUEUE_ERROR; + + /* format the FC-NVME CMD IU and fcp_req */ + cmdiu->connection_id = cpu_to_be64(queue->connection_id); + csn = atomic_inc_return(&queue->csn); + cmdiu->csn = cpu_to_be32(csn); + cmdiu->data_len = cpu_to_be32(data_len); + switch (io_dir) { + case NVMEFC_FCP_WRITE: + cmdiu->flags = FCNVME_CMD_FLAGS_WRITE; + break; + case NVMEFC_FCP_READ: + cmdiu->flags = FCNVME_CMD_FLAGS_READ; + break; + case NVMEFC_FCP_NODATA: + cmdiu->flags = 0; + break; + } + op->fcp_req.payload_length = data_len; + op->fcp_req.io_dir = io_dir; + op->fcp_req.transferred_length = 0; + op->fcp_req.rcv_rsplen = 0; + op->fcp_req.status = 0; + op->fcp_req.sqid = cpu_to_le16(queue->qnum); + + /* + * validate per fabric rules, set fields mandated by fabric spec + * as well as those by FC-NVME spec. + */ + WARN_ON_ONCE(sqe->common.metadata); + WARN_ON_ONCE(sqe->common.dptr.prp1); + WARN_ON_ONCE(sqe->common.dptr.prp2); + sqe->common.flags |= NVME_CMD_SGL_METABUF; + + /* + * format SQE DPTR field per FC-NVME rules + * type=data block descr; subtype=offset; + * offset is currently 0. + */ + sqe->rw.dptr.sgl.type = NVME_SGL_FMT_OFFSET; + sqe->rw.dptr.sgl.length = cpu_to_le32(data_len); + sqe->rw.dptr.sgl.addr = 0; + + /* odd that we set the command_id - should come from nvme-fabrics */ + WARN_ON_ONCE(sqe->common.command_id != cpu_to_le16(op->rqno)); + + if (op->rq) { /* skipped on aens */ + ret = nvme_fc_map_data(ctrl, op->rq, op); + if (ret < 0) { + dev_err(queue->ctrl->ctrl.device, + "Failed to map data (%d)\n", ret); + nvme_cleanup_cmd(op->rq); + nvme_fc_ctrl_put(ctrl); + return (ret == -ENOMEM || ret == -EAGAIN) ? + BLK_MQ_RQ_QUEUE_BUSY : BLK_MQ_RQ_QUEUE_ERROR; + } + } + + fc_dma_sync_single_for_device(ctrl->lport->dev, op->fcp_req.cmddma, + sizeof(op->cmd_iu), DMA_TO_DEVICE); + + atomic_set(&op->state, FCPOP_STATE_ACTIVE); + + if (op->rq) + blk_mq_start_request(op->rq); + + ret = ctrl->lport->ops->fcp_io(&ctrl->lport->localport, + &ctrl->rport->remoteport, + queue->lldd_handle, &op->fcp_req); + + if (ret) { + dev_err(ctrl->dev, + "Send nvme command failed - lldd returned %d.\n", ret); + + if (op->rq) { /* normal request */ + nvme_fc_unmap_data(ctrl, op->rq, op); + nvme_cleanup_cmd(op->rq); + } + /* else - aen. no cleanup needed */ + + nvme_fc_ctrl_put(ctrl); + + if (ret != -EBUSY) + return BLK_MQ_RQ_QUEUE_ERROR; + + if (op->rq) { + blk_mq_stop_hw_queues(op->rq->q); + blk_mq_delay_queue(queue->hctx, NVMEFC_QUEUE_DELAY); + } + return BLK_MQ_RQ_QUEUE_BUSY; + } + + return BLK_MQ_RQ_QUEUE_OK; +} + +static int +nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx, + const struct blk_mq_queue_data *bd) +{ + struct nvme_ns *ns = hctx->queue->queuedata; + struct nvme_fc_queue *queue = hctx->driver_data; + struct nvme_fc_ctrl *ctrl = queue->ctrl; + struct request *rq = bd->rq; + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); + struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu; + struct nvme_command *sqe = &cmdiu->sqe; + enum nvmefc_fcp_datadir io_dir; + u32 data_len; + int ret; + + ret = nvme_setup_cmd(ns, rq, sqe); + if (ret) + return ret; + + data_len = nvme_map_len(rq); + if (data_len) + io_dir = ((rq_data_dir(rq) == WRITE) ? + NVMEFC_FCP_WRITE : NVMEFC_FCP_READ); + else + io_dir = NVMEFC_FCP_NODATA; + + return nvme_fc_start_fcp_op(ctrl, queue, op, data_len, io_dir); +} + +static struct blk_mq_tags * +nvme_fc_tagset(struct nvme_fc_queue *queue) +{ + if (queue->qnum == 0) + return queue->ctrl->admin_tag_set.tags[queue->qnum]; + + return queue->ctrl->tag_set.tags[queue->qnum - 1]; +} + +static int +nvme_fc_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag) + +{ + struct nvme_fc_queue *queue = hctx->driver_data; + struct nvme_fc_ctrl *ctrl = queue->ctrl; + struct request *req; + struct nvme_fc_fcp_op *op; + + req = blk_mq_tag_to_rq(nvme_fc_tagset(queue), tag); + if (!req) { + dev_err(queue->ctrl->ctrl.device, + "tag 0x%x on QNum %#x not found\n", + tag, queue->qnum); + return 0; + } + + op = blk_mq_rq_to_pdu(req); + + if ((atomic_read(&op->state) == FCPOP_STATE_ACTIVE) && + (ctrl->lport->ops->poll_queue)) + ctrl->lport->ops->poll_queue(&ctrl->lport->localport, + queue->lldd_handle); + + return ((atomic_read(&op->state) != FCPOP_STATE_ACTIVE)); +} + +static void +nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx) +{ + struct nvme_fc_ctrl *ctrl = to_fc_ctrl(arg); + struct nvme_fc_fcp_op *aen_op; + int ret; + + if (aer_idx > NVME_FC_NR_AEN_COMMANDS) + return; + + aen_op = &ctrl->aen_ops[aer_idx]; + + ret = nvme_fc_start_fcp_op(ctrl, aen_op->queue, aen_op, 0, + NVMEFC_FCP_NODATA); + if (ret) + dev_err(ctrl->ctrl.device, + "failed async event work [%d]\n", aer_idx); +} + +static void +nvme_fc_complete_rq(struct request *rq) +{ + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq); + struct nvme_fc_ctrl *ctrl = op->ctrl; + int error = 0, state; + + state = atomic_xchg(&op->state, FCPOP_STATE_IDLE); + + nvme_cleanup_cmd(rq); + + nvme_fc_unmap_data(ctrl, rq, op); + + if (unlikely(rq->errors)) { + if (nvme_req_needs_retry(rq, rq->errors)) { + nvme_requeue_req(rq); + return; + } + + if (rq->cmd_type == REQ_TYPE_DRV_PRIV) + error = rq->errors; + else + error = nvme_error_status(rq->errors); + } + + nvme_fc_ctrl_put(ctrl); + + blk_mq_end_request(rq, error); +} + +static struct blk_mq_ops nvme_fc_mq_ops = { + .queue_rq = nvme_fc_queue_rq, + .complete = nvme_fc_complete_rq, + .init_request = nvme_fc_init_request, + .exit_request = nvme_fc_exit_request, + .reinit_request = nvme_fc_reinit_request, + .init_hctx = nvme_fc_init_hctx, + .poll = nvme_fc_poll, + .timeout = nvme_fc_timeout, +}; + +static struct blk_mq_ops nvme_fc_admin_mq_ops = { + .queue_rq = nvme_fc_queue_rq, + .complete = nvme_fc_complete_rq, + .init_request = nvme_fc_init_admin_request, + .exit_request = nvme_fc_exit_request, + .reinit_request = nvme_fc_reinit_request, + .init_hctx = nvme_fc_init_admin_hctx, + .timeout = nvme_fc_timeout, +}; + +static int +nvme_fc_configure_admin_queue(struct nvme_fc_ctrl *ctrl) +{ + u32 segs; + int error; + + nvme_fc_init_queue(ctrl, 0, NVME_FC_AQ_BLKMQ_DEPTH); + + error = nvme_fc_connect_admin_queue(ctrl, &ctrl->queues[0], + NVME_FC_AQ_BLKMQ_DEPTH, + (NVME_FC_AQ_BLKMQ_DEPTH / 4)); + if (error) + return error; + + memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set)); + ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops; + ctrl->admin_tag_set.queue_depth = NVME_FC_AQ_BLKMQ_DEPTH; + ctrl->admin_tag_set.reserved_tags = 2; /* fabric connect + Keep-Alive */ + ctrl->admin_tag_set.numa_node = NUMA_NO_NODE; + ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + + (SG_CHUNK_SIZE * + sizeof(struct scatterlist)) + + ctrl->lport->ops->fcprqst_priv_sz; + ctrl->admin_tag_set.driver_data = ctrl; + ctrl->admin_tag_set.nr_hw_queues = 1; + ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT; + + error = blk_mq_alloc_tag_set(&ctrl->admin_tag_set); + if (error) + goto out_free_queue; + + ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); + if (IS_ERR(ctrl->ctrl.admin_q)) { + error = PTR_ERR(ctrl->ctrl.admin_q); + goto out_free_tagset; + } + + error = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0, + NVME_FC_AQ_BLKMQ_DEPTH); + if (error) + goto out_cleanup_queue; + + error = nvmf_connect_admin_queue(&ctrl->ctrl); + if (error) + goto out_delete_hw_queue; + + error = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->cap); + if (error) { + dev_err(ctrl->ctrl.device, + "prop_get NVME_REG_CAP failed\n"); + goto out_delete_hw_queue; + } + + ctrl->ctrl.sqsize = + min_t(int, NVME_CAP_MQES(ctrl->cap) + 1, ctrl->ctrl.sqsize); + + error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->cap); + if (error) + goto out_delete_hw_queue; + + segs = min_t(u32, NVME_FC_MAX_SEGMENTS, + ctrl->lport->ops->max_sgl_segments); + ctrl->ctrl.max_hw_sectors = (segs - 1) << (PAGE_SHIFT - 9); + + error = nvme_init_identify(&ctrl->ctrl); + if (error) + goto out_delete_hw_queue; + + nvme_start_keep_alive(&ctrl->ctrl); + + return 0; + +out_delete_hw_queue: + __nvme_fc_delete_hw_queue(ctrl, &ctrl->queues[0], 0); +out_cleanup_queue: + blk_cleanup_queue(ctrl->ctrl.admin_q); +out_free_tagset: + blk_mq_free_tag_set(&ctrl->admin_tag_set); +out_free_queue: + nvme_fc_free_queue(&ctrl->queues[0]); + return error; +} + +/* + * This routine is used by the transport when it needs to find active + * io on a queue that is to be terminated. The transport uses + * blk_mq_tagset_busy_itr() to find the busy requests, which then invoke + * this routine to kill them on a 1 by 1 basis. + * + * As FC allocates FC exchange for each io, the transport must contact + * the LLDD to terminate the exchange, thus releasing the FC exchange. + * After terminating the exchange the LLDD will call the transport's + * normal io done path for the request, but it will have an aborted + * status. The done path will return the io request back to the block + * layer with an error status. + */ +static void +nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) +{ + struct nvme_ctrl *nctrl = data; + struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); + struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(req); +int status; + + if (!blk_mq_request_started(req)) + return; + + /* this performs an ABTS-LS on the FC exchange for the io */ + status = __nvme_fc_abort_op(ctrl, op); + /* + * if __nvme_fc_abort_op failed: io wasn't active to abort + * consider it done. Assume completion path already completing + * in parallel + */ + if (status) + /* io wasn't active to abort consider it done */ + /* assume completion path already completing in parallel */ + return; +} + + +/* + * This routine stops operation of the controller. Admin and IO queues + * are stopped, outstanding ios on them terminated, and the nvme ctrl + * is shutdown. + */ +static void +nvme_fc_shutdown_ctrl(struct nvme_fc_ctrl *ctrl) +{ + /* + * If io queues are present, stop them and terminate all outstanding + * ios on them. As FC allocates FC exchange for each io, the + * transport must contact the LLDD to terminate the exchange, + * thus releasing the FC exchange. We use blk_mq_tagset_busy_itr() + * to tell us what io's are busy and invoke a transport routine + * to kill them with the LLDD. After terminating the exchange + * the LLDD will call the transport's normal io done path, but it + * will have an aborted status. The done path will return the + * io requests back to the block layer as part of normal completions + * (but with error status). + */ + if (ctrl->queue_count > 1) { + nvme_stop_queues(&ctrl->ctrl); + blk_mq_tagset_busy_iter(&ctrl->tag_set, + nvme_fc_terminate_exchange, &ctrl->ctrl); + } + + if (ctrl->ctrl.state == NVME_CTRL_LIVE) + nvme_shutdown_ctrl(&ctrl->ctrl); + + /* + * now clean up the admin queue. Same thing as above. + * use blk_mq_tagset_busy_itr() and the transport routine to + * terminate the exchanges. + */ + blk_mq_stop_hw_queues(ctrl->ctrl.admin_q); + blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, + nvme_fc_terminate_exchange, &ctrl->ctrl); +} + +/* + * Called to teardown an association. + * May be called with association fully in place or partially in place. + */ +static void +__nvme_fc_remove_ctrl(struct nvme_fc_ctrl *ctrl) +{ + nvme_stop_keep_alive(&ctrl->ctrl); + + /* stop and terminate ios on admin and io queues */ + nvme_fc_shutdown_ctrl(ctrl); + + /* + * tear down the controller + * This will result in the last reference on the nvme ctrl to + * expire, calling the transport nvme_fc_free_nvme_ctrl() callback. + * From there, the transport will tear down it's logical queues and + * association. + */ + nvme_uninit_ctrl(&ctrl->ctrl); + + nvme_put_ctrl(&ctrl->ctrl); +} + +static void +nvme_fc_del_ctrl_work(struct work_struct *work) +{ + struct nvme_fc_ctrl *ctrl = + container_of(work, struct nvme_fc_ctrl, delete_work); + + __nvme_fc_remove_ctrl(ctrl); +} + +static int +__nvme_fc_del_ctrl(struct nvme_fc_ctrl *ctrl) +{ + if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING)) + return -EBUSY; + + if (!queue_work(nvme_fc_wq, &ctrl->delete_work)) + return -EBUSY; + + return 0; +} + +/* + * Request from nvme core layer to delete the controller + */ +static int +nvme_fc_del_nvme_ctrl(struct nvme_ctrl *nctrl) +{ + struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl); + struct nvme_fc_rport *rport = ctrl->rport; + unsigned long flags; + int ret; + + spin_lock_irqsave(&rport->lock, flags); + ret = __nvme_fc_del_ctrl(ctrl); + spin_unlock_irqrestore(&rport->lock, flags); + if (ret) + return ret; + + flush_work(&ctrl->delete_work); + + return 0; +} + +static int +nvme_fc_reset_nvme_ctrl(struct nvme_ctrl *nctrl) +{ + return -EIO; +} + +static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = { + .name = "fc", + .module = THIS_MODULE, + .is_fabrics = true, + .reg_read32 = nvmf_reg_read32, + .reg_read64 = nvmf_reg_read64, + .reg_write32 = nvmf_reg_write32, + .reset_ctrl = nvme_fc_reset_nvme_ctrl, + .free_ctrl = nvme_fc_free_nvme_ctrl, + .submit_async_event = nvme_fc_submit_async_event, + .delete_ctrl = nvme_fc_del_nvme_ctrl, + .get_subsysnqn = nvmf_get_subsysnqn, + .get_address = nvmf_get_address, +}; + +static int +nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl) +{ + struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; + int ret; + + ret = nvme_set_queue_count(&ctrl->ctrl, &opts->nr_io_queues); + if (ret) { + dev_info(ctrl->ctrl.device, + "set_queue_count failed: %d\n", ret); + return ret; + } + + ctrl->queue_count = opts->nr_io_queues + 1; + if (!opts->nr_io_queues) + return 0; + + dev_info(ctrl->ctrl.device, "creating %d I/O queues.\n", + opts->nr_io_queues); + + nvme_fc_init_io_queues(ctrl); + + memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set)); + ctrl->tag_set.ops = &nvme_fc_mq_ops; + ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size; + ctrl->tag_set.reserved_tags = 1; /* fabric connect */ + ctrl->tag_set.numa_node = NUMA_NO_NODE; + ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; + ctrl->tag_set.cmd_size = sizeof(struct nvme_fc_fcp_op) + + (SG_CHUNK_SIZE * + sizeof(struct scatterlist)) + + ctrl->lport->ops->fcprqst_priv_sz; + ctrl->tag_set.driver_data = ctrl; + ctrl->tag_set.nr_hw_queues = ctrl->queue_count - 1; + ctrl->tag_set.timeout = NVME_IO_TIMEOUT; + + ret = blk_mq_alloc_tag_set(&ctrl->tag_set); + if (ret) + return ret; + + ctrl->ctrl.tagset = &ctrl->tag_set; + + ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set); + if (IS_ERR(ctrl->ctrl.connect_q)) { + ret = PTR_ERR(ctrl->ctrl.connect_q); + goto out_free_tag_set; + } + + ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.opts->queue_size); + if (ret) + goto out_cleanup_blk_queue; + + ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.opts->queue_size); + if (ret) + goto out_delete_hw_queues; + + return 0; + +out_delete_hw_queues: + nvme_fc_delete_hw_io_queues(ctrl); +out_cleanup_blk_queue: + nvme_stop_keep_alive(&ctrl->ctrl); + blk_cleanup_queue(ctrl->ctrl.connect_q); +out_free_tag_set: + blk_mq_free_tag_set(&ctrl->tag_set); + nvme_fc_free_io_queues(ctrl); + + /* force put free routine to ignore io queues */ + ctrl->ctrl.tagset = NULL; + + return ret; +} + + +static struct nvme_ctrl * +__nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, + struct nvme_fc_lport *lport, struct nvme_fc_rport *rport) +{ + struct nvme_fc_ctrl *ctrl; + unsigned long flags; + int ret, idx; + bool changed; + + ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) { + ret = -ENOMEM; + goto out_fail; + } + + idx = ida_simple_get(&nvme_fc_ctrl_cnt, 0, 0, GFP_KERNEL); + if (idx < 0) { + ret = -ENOSPC; + goto out_free_ctrl; + } + + ctrl->ctrl.opts = opts; + INIT_LIST_HEAD(&ctrl->ctrl_list); + INIT_LIST_HEAD(&ctrl->ls_req_list); + ctrl->lport = lport; + ctrl->rport = rport; + ctrl->dev = lport->dev; + ctrl->state = FCCTRL_INIT; + ctrl->cnum = idx; + + ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0); + if (ret) + goto out_free_ida; + + get_device(ctrl->dev); + kref_init(&ctrl->ref); + + INIT_WORK(&ctrl->delete_work, nvme_fc_del_ctrl_work); + spin_lock_init(&ctrl->lock); + + /* io queue count */ + ctrl->queue_count = min_t(unsigned int, + opts->nr_io_queues, + lport->ops->max_hw_queues); + opts->nr_io_queues = ctrl->queue_count; /* so opts has valid value */ + ctrl->queue_count++; /* +1 for admin queue */ + + ctrl->ctrl.sqsize = opts->queue_size - 1; + ctrl->ctrl.kato = opts->kato; + + ret = -ENOMEM; + ctrl->queues = kcalloc(ctrl->queue_count, sizeof(struct nvme_fc_queue), + GFP_KERNEL); + if (!ctrl->queues) + goto out_uninit_ctrl; + + ret = nvme_fc_configure_admin_queue(ctrl); + if (ret) + goto out_uninit_ctrl; + + /* sanity checks */ + + /* FC-NVME supports 64-byte SQE only */ + if (ctrl->ctrl.ioccsz != 4) { + dev_err(ctrl->ctrl.device, "ioccsz %d is not supported!\n", + ctrl->ctrl.ioccsz); + goto out_remove_admin_queue; + } + /* FC-NVME supports 16-byte CQE only */ + if (ctrl->ctrl.iorcsz != 1) { + dev_err(ctrl->ctrl.device, "iorcsz %d is not supported!\n", + ctrl->ctrl.iorcsz); + goto out_remove_admin_queue; + } + /* FC-NVME does not have other data in the capsule */ + if (ctrl->ctrl.icdoff) { + dev_err(ctrl->ctrl.device, "icdoff %d is not supported!\n", + ctrl->ctrl.icdoff); + goto out_remove_admin_queue; + } + + /* FC-NVME supports normal SGL Data Block Descriptors */ + + if (opts->queue_size > ctrl->ctrl.maxcmd) { + /* warn if maxcmd is lower than queue_size */ + dev_warn(ctrl->ctrl.device, + "queue_size %zu > ctrl maxcmd %u, reducing " + "to queue_size\n", + opts->queue_size, ctrl->ctrl.maxcmd); + opts->queue_size = ctrl->ctrl.maxcmd; + } + + ret = nvme_fc_init_aen_ops(ctrl); + if (ret) + goto out_exit_aen_ops; + + if (ctrl->queue_count > 1) { + ret = nvme_fc_create_io_queues(ctrl); + if (ret) + goto out_exit_aen_ops; + } + + spin_lock_irqsave(&ctrl->lock, flags); + ctrl->state = FCCTRL_ACTIVE; + spin_unlock_irqrestore(&ctrl->lock, flags); + + changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE); + WARN_ON_ONCE(!changed); + + dev_info(ctrl->ctrl.device, + "NVME-FC{%d}: new ctrl: NQN \"%s\" (%p)\n", + ctrl->cnum, ctrl->ctrl.opts->subsysnqn, &ctrl); + + kref_get(&ctrl->ctrl.kref); + + spin_lock_irqsave(&rport->lock, flags); + list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list); + spin_unlock_irqrestore(&rport->lock, flags); + + if (opts->nr_io_queues) { + nvme_queue_scan(&ctrl->ctrl); + nvme_queue_async_events(&ctrl->ctrl); + } + + return &ctrl->ctrl; + +out_exit_aen_ops: + nvme_fc_exit_aen_ops(ctrl); +out_remove_admin_queue: + /* send a Disconnect(association) LS to fc-nvme target */ + nvme_fc_xmt_disconnect_assoc(ctrl); + nvme_stop_keep_alive(&ctrl->ctrl); + nvme_fc_destroy_admin_queue(ctrl); +out_uninit_ctrl: + nvme_uninit_ctrl(&ctrl->ctrl); + nvme_put_ctrl(&ctrl->ctrl); + if (ret > 0) + ret = -EIO; + /* exit via here will follow ctlr ref point callbacks to free */ + return ERR_PTR(ret); + +out_free_ida: + ida_simple_remove(&nvme_fc_ctrl_cnt, ctrl->cnum); +out_free_ctrl: + kfree(ctrl); +out_fail: + nvme_fc_rport_put(rport); + /* exit via here doesn't follow ctlr ref points */ + return ERR_PTR(ret); +} + +enum { + FCT_TRADDR_ERR = 0, + FCT_TRADDR_WWNN = 1 << 0, + FCT_TRADDR_WWPN = 1 << 1, +}; + +struct nvmet_fc_traddr { + u64 nn; + u64 pn; +}; + +static const match_table_t traddr_opt_tokens = { + { FCT_TRADDR_WWNN, "nn-%s" }, + { FCT_TRADDR_WWPN, "pn-%s" }, + { FCT_TRADDR_ERR, NULL } +}; + +static int +nvme_fc_parse_address(struct nvmet_fc_traddr *traddr, char *buf) +{ + substring_t args[MAX_OPT_ARGS]; + char *options, *o, *p; + int token, ret = 0; + u64 token64; + + options = o = kstrdup(buf, GFP_KERNEL); + if (!options) + return -ENOMEM; + + while ((p = strsep(&o, ":\n")) != NULL) { + if (!*p) + continue; + + token = match_token(p, traddr_opt_tokens, args); + switch (token) { + case FCT_TRADDR_WWNN: + if (match_u64(args, &token64)) { + ret = -EINVAL; + goto out; + } + traddr->nn = token64; + break; + case FCT_TRADDR_WWPN: + if (match_u64(args, &token64)) { + ret = -EINVAL; + goto out; + } + traddr->pn = token64; + break; + default: + pr_warn("unknown traddr token or missing value '%s'\n", + p); + ret = -EINVAL; + goto out; + } + } + +out: + kfree(options); + return ret; +} + +static struct nvme_ctrl * +nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts) +{ + struct nvme_fc_lport *lport; + struct nvme_fc_rport *rport; + struct nvmet_fc_traddr laddr = { 0L, 0L }; + struct nvmet_fc_traddr raddr = { 0L, 0L }; + unsigned long flags; + int ret; + + ret = nvme_fc_parse_address(&raddr, opts->traddr); + if (ret || !raddr.nn || !raddr.pn) + return ERR_PTR(-EINVAL); + + ret = nvme_fc_parse_address(&laddr, opts->host_traddr); + if (ret || !laddr.nn || !laddr.pn) + return ERR_PTR(-EINVAL); + + /* find the host and remote ports to connect together */ + spin_lock_irqsave(&nvme_fc_lock, flags); + list_for_each_entry(lport, &nvme_fc_lport_list, port_list) { + if (lport->localport.node_name != laddr.nn || + lport->localport.port_name != laddr.pn) + continue; + + list_for_each_entry(rport, &lport->endp_list, endp_list) { + if (rport->remoteport.node_name != raddr.nn || + rport->remoteport.port_name != raddr.pn) + continue; + + /* if fail to get reference fall through. Will error */ + if (!nvme_fc_rport_get(rport)) + break; + + spin_unlock_irqrestore(&nvme_fc_lock, flags); + + return __nvme_fc_create_ctrl(dev, opts, lport, rport); + } + } + spin_unlock_irqrestore(&nvme_fc_lock, flags); + + return ERR_PTR(-ENOENT); +} + + +static struct nvmf_transport_ops nvme_fc_transport = { + .name = "fc", + .required_opts = NVMF_OPT_TRADDR | NVMF_OPT_HOST_TRADDR, + .allowed_opts = NVMF_OPT_RECONNECT_DELAY, + .create_ctrl = nvme_fc_create_ctrl, +}; + +static int __init nvme_fc_init_module(void) +{ + nvme_fc_wq = create_workqueue("nvme_fc_wq"); + if (!nvme_fc_wq) + return -ENOMEM; + + nvmf_register_transport(&nvme_fc_transport); + return 0; +} + +static void __exit nvme_fc_exit_module(void) +{ + /* sanity check - all lports should be removed */ + if (!list_empty(&nvme_fc_lport_list)) + pr_warn("%s: localport list not empty\n", __func__); + + nvmf_unregister_transport(&nvme_fc_transport); + + destroy_workqueue(nvme_fc_wq); + + ida_destroy(&nvme_fc_local_port_cnt); + ida_destroy(&nvme_fc_ctrl_cnt); +} + +module_init(nvme_fc_init_module); +module_exit(nvme_fc_exit_module); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c index 5daf2f4..588d4a3 100644 --- a/drivers/nvme/host/lightnvm.c +++ b/drivers/nvme/host/lightnvm.c @@ -146,14 +146,6 @@ struct nvme_nvm_command { }; }; -struct nvme_nvm_completion { - __le64 result; /* Used by LightNVM to return ppa completions */ - __le16 sq_head; /* how much of this queue may be reclaimed */ - __le16 sq_id; /* submission queue that generated this entry */ - __u16 command_id; /* of the command which completed */ - __le16 status; /* did the command fail, and if so, why? */ -}; - #define NVME_NVM_LP_MLC_PAIRS 886 struct nvme_nvm_lp_mlc { __le16 num_pairs; @@ -360,6 +352,7 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb, while (nlb) { u32 cmd_nlb = min(nlb_pr_rq, nlb); + u64 elba = slba + cmd_nlb; c.l2p.slba = cpu_to_le64(cmd_slba); c.l2p.nlb = cpu_to_le32(cmd_nlb); @@ -373,6 +366,14 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb, goto out; } + if (unlikely(elba > nvmdev->total_secs)) { + pr_err("nvm: L2P data from device is out of bounds!\n"); + return -EINVAL; + } + + /* Transform physical address to target address space */ + nvmdev->mt->part_to_tgt(nvmdev, entries, cmd_nlb); + if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) { ret = -EINTR; goto out; @@ -391,11 +392,12 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa, u8 *blks) { struct request_queue *q = nvmdev->q; + struct nvm_geo *geo = &nvmdev->geo; struct nvme_ns *ns = q->queuedata; struct nvme_ctrl *ctrl = ns->ctrl; struct nvme_nvm_command c = {}; struct nvme_nvm_bb_tbl *bb_tbl; - int nr_blks = nvmdev->blks_per_lun * nvmdev->plane_mode; + int nr_blks = geo->blks_per_lun * geo->plane_mode; int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks; int ret = 0; @@ -436,7 +438,7 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa, goto out; } - memcpy(blks, bb_tbl->blk, nvmdev->blks_per_lun * nvmdev->plane_mode); + memcpy(blks, bb_tbl->blk, geo->blks_per_lun * geo->plane_mode); out: kfree(bb_tbl); return ret; @@ -481,14 +483,11 @@ static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd, static void nvme_nvm_end_io(struct request *rq, int error) { struct nvm_rq *rqd = rq->end_io_data; - struct nvme_nvm_completion *cqe = rq->special; - - if (cqe) - rqd->ppa_status = le64_to_cpu(cqe->result); + rqd->ppa_status = nvme_req(rq)->result.u64; nvm_end_io(rqd, error); - kfree(rq->cmd); + kfree(nvme_req(rq)->cmd); blk_mq_free_request(rq); } @@ -500,20 +499,18 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) struct bio *bio = rqd->bio; struct nvme_nvm_command *cmd; - rq = blk_mq_alloc_request(q, bio_data_dir(bio), 0); - if (IS_ERR(rq)) + cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL); + if (!cmd) return -ENOMEM; - cmd = kzalloc(sizeof(struct nvme_nvm_command) + - sizeof(struct nvme_nvm_completion), GFP_KERNEL); - if (!cmd) { - blk_mq_free_request(rq); + rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0, NVME_QID_ANY); + if (IS_ERR(rq)) { + kfree(cmd); return -ENOMEM; } + rq->cmd_flags &= ~REQ_FAILFAST_DRIVER; - rq->cmd_type = REQ_TYPE_DRV_PRIV; rq->ioprio = bio_prio(bio); - if (bio_has_data(bio)) rq->nr_phys_segments = bio_phys_segments(q, bio); @@ -522,10 +519,6 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) nvme_nvm_rqtocmd(rq, rqd, ns, cmd); - rq->cmd = (unsigned char *)cmd; - rq->cmd_len = sizeof(struct nvme_nvm_command); - rq->special = cmd + 1; - rq->end_io_data = rqd; blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io); @@ -543,6 +536,7 @@ static int nvme_nvm_erase_block(struct nvm_dev *dev, struct nvm_rq *rqd) c.erase.nsid = cpu_to_le32(ns->ns_id); c.erase.spba = cpu_to_le64(rqd->ppa_addr.ppa); c.erase.length = cpu_to_le16(rqd->nr_ppas - 1); + c.erase.control = cpu_to_le16(rqd->flags); return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0); } @@ -592,12 +586,10 @@ static struct nvm_dev_ops nvme_nvm_dev_ops = { .max_phys_sect = 64, }; -int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node, - const struct attribute_group *attrs) +int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node) { struct request_queue *q = ns->queue; struct nvm_dev *dev; - int ret; dev = nvm_alloc_dev(node); if (!dev) @@ -606,18 +598,10 @@ int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node, dev->q = q; memcpy(dev->name, disk_name, DISK_NAME_LEN); dev->ops = &nvme_nvm_dev_ops; - dev->parent_dev = ns->ctrl->device; dev->private_data = ns; ns->ndev = dev; - ret = nvm_register(dev); - - ns->lba_shift = ilog2(dev->sec_size); - - if (sysfs_create_group(&dev->dev.kobj, attrs)) - pr_warn("%s: failed to create sysfs group for identification\n", - disk_name); - return ret; + return nvm_register(dev); } void nvme_nvm_unregister(struct nvme_ns *ns) @@ -625,6 +609,167 @@ void nvme_nvm_unregister(struct nvme_ns *ns) nvm_unregister(ns->ndev); } +static ssize_t nvm_dev_attr_show(struct device *dev, + struct device_attribute *dattr, char *page) +{ + struct nvme_ns *ns = nvme_get_ns_from_dev(dev); + struct nvm_dev *ndev = ns->ndev; + struct nvm_id *id; + struct nvm_id_group *grp; + struct attribute *attr; + + if (!ndev) + return 0; + + id = &ndev->identity; + grp = &id->groups[0]; + attr = &dattr->attr; + + if (strcmp(attr->name, "version") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", id->ver_id); + } else if (strcmp(attr->name, "vendor_opcode") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", id->vmnt); + } else if (strcmp(attr->name, "capabilities") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", id->cap); + } else if (strcmp(attr->name, "device_mode") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", id->dom); + } else if (strcmp(attr->name, "media_manager") == 0) { + if (!ndev->mt) + return scnprintf(page, PAGE_SIZE, "%s\n", "none"); + return scnprintf(page, PAGE_SIZE, "%s\n", ndev->mt->name); + } else if (strcmp(attr->name, "ppa_format") == 0) { + return scnprintf(page, PAGE_SIZE, + "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n", + id->ppaf.ch_offset, id->ppaf.ch_len, + id->ppaf.lun_offset, id->ppaf.lun_len, + id->ppaf.pln_offset, id->ppaf.pln_len, + id->ppaf.blk_offset, id->ppaf.blk_len, + id->ppaf.pg_offset, id->ppaf.pg_len, + id->ppaf.sect_offset, id->ppaf.sect_len); + } else if (strcmp(attr->name, "media_type") == 0) { /* u8 */ + return scnprintf(page, PAGE_SIZE, "%u\n", grp->mtype); + } else if (strcmp(attr->name, "flash_media_type") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->fmtype); + } else if (strcmp(attr->name, "num_channels") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_ch); + } else if (strcmp(attr->name, "num_luns") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_lun); + } else if (strcmp(attr->name, "num_planes") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_pln); + } else if (strcmp(attr->name, "num_blocks") == 0) { /* u16 */ + return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_blk); + } else if (strcmp(attr->name, "num_pages") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->num_pg); + } else if (strcmp(attr->name, "page_size") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->fpg_sz); + } else if (strcmp(attr->name, "hw_sector_size") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->csecs); + } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */ + return scnprintf(page, PAGE_SIZE, "%u\n", grp->sos); + } else if (strcmp(attr->name, "read_typ") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->trdt); + } else if (strcmp(attr->name, "read_max") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->trdm); + } else if (strcmp(attr->name, "prog_typ") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->tprt); + } else if (strcmp(attr->name, "prog_max") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->tprm); + } else if (strcmp(attr->name, "erase_typ") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->tbet); + } else if (strcmp(attr->name, "erase_max") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", grp->tbem); + } else if (strcmp(attr->name, "multiplane_modes") == 0) { + return scnprintf(page, PAGE_SIZE, "0x%08x\n", grp->mpos); + } else if (strcmp(attr->name, "media_capabilities") == 0) { + return scnprintf(page, PAGE_SIZE, "0x%08x\n", grp->mccap); + } else if (strcmp(attr->name, "max_phys_secs") == 0) { + return scnprintf(page, PAGE_SIZE, "%u\n", + ndev->ops->max_phys_sect); + } else { + return scnprintf(page, + PAGE_SIZE, + "Unhandled attr(%s) in `nvm_dev_attr_show`\n", + attr->name); + } +} + +#define NVM_DEV_ATTR_RO(_name) \ + DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL) + +static NVM_DEV_ATTR_RO(version); +static NVM_DEV_ATTR_RO(vendor_opcode); +static NVM_DEV_ATTR_RO(capabilities); +static NVM_DEV_ATTR_RO(device_mode); +static NVM_DEV_ATTR_RO(ppa_format); +static NVM_DEV_ATTR_RO(media_manager); + +static NVM_DEV_ATTR_RO(media_type); +static NVM_DEV_ATTR_RO(flash_media_type); +static NVM_DEV_ATTR_RO(num_channels); +static NVM_DEV_ATTR_RO(num_luns); +static NVM_DEV_ATTR_RO(num_planes); +static NVM_DEV_ATTR_RO(num_blocks); +static NVM_DEV_ATTR_RO(num_pages); +static NVM_DEV_ATTR_RO(page_size); +static NVM_DEV_ATTR_RO(hw_sector_size); +static NVM_DEV_ATTR_RO(oob_sector_size); +static NVM_DEV_ATTR_RO(read_typ); +static NVM_DEV_ATTR_RO(read_max); +static NVM_DEV_ATTR_RO(prog_typ); +static NVM_DEV_ATTR_RO(prog_max); +static NVM_DEV_ATTR_RO(erase_typ); +static NVM_DEV_ATTR_RO(erase_max); +static NVM_DEV_ATTR_RO(multiplane_modes); +static NVM_DEV_ATTR_RO(media_capabilities); +static NVM_DEV_ATTR_RO(max_phys_secs); + +static struct attribute *nvm_dev_attrs[] = { + &dev_attr_version.attr, + &dev_attr_vendor_opcode.attr, + &dev_attr_capabilities.attr, + &dev_attr_device_mode.attr, + &dev_attr_media_manager.attr, + + &dev_attr_ppa_format.attr, + &dev_attr_media_type.attr, + &dev_attr_flash_media_type.attr, + &dev_attr_num_channels.attr, + &dev_attr_num_luns.attr, + &dev_attr_num_planes.attr, + &dev_attr_num_blocks.attr, + &dev_attr_num_pages.attr, + &dev_attr_page_size.attr, + &dev_attr_hw_sector_size.attr, + &dev_attr_oob_sector_size.attr, + &dev_attr_read_typ.attr, + &dev_attr_read_max.attr, + &dev_attr_prog_typ.attr, + &dev_attr_prog_max.attr, + &dev_attr_erase_typ.attr, + &dev_attr_erase_max.attr, + &dev_attr_multiplane_modes.attr, + &dev_attr_media_capabilities.attr, + &dev_attr_max_phys_secs.attr, + NULL, +}; + +static const struct attribute_group nvm_dev_attr_group = { + .name = "lightnvm", + .attrs = nvm_dev_attrs, +}; + +int nvme_nvm_register_sysfs(struct nvme_ns *ns) +{ + return sysfs_create_group(&disk_to_dev(ns->disk)->kobj, + &nvm_dev_attr_group); +} + +void nvme_nvm_unregister_sysfs(struct nvme_ns *ns) +{ + sysfs_remove_group(&disk_to_dev(ns->disk)->kobj, + &nvm_dev_attr_group); +} + /* move to shared place when used in multiple places. */ #define PCI_VENDOR_ID_CNEX 0x1d1d #define PCI_DEVICE_ID_CNEX_WL 0x2807 diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index d47f5a5..bd53214 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -79,6 +79,20 @@ enum nvme_quirks { NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3), }; +/* + * Common request structure for NVMe passthrough. All drivers must have + * this structure as the first member of their request-private data. + */ +struct nvme_request { + struct nvme_command *cmd; + union nvme_result result; +}; + +static inline struct nvme_request *nvme_req(struct request *req) +{ + return blk_mq_rq_to_pdu(req); +} + /* The below value is the specific amount of delay needed before checking * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was @@ -222,8 +236,10 @@ static inline unsigned nvme_map_len(struct request *rq) static inline void nvme_cleanup_cmd(struct request *req) { - if (req_op(req) == REQ_OP_DISCARD) - kfree(req->completion_data); + if (req->rq_flags & RQF_SPECIAL_PAYLOAD) { + kfree(page_address(req->special_vec.bv_page) + + req->special_vec.bv_offset); + } } static inline int nvme_error_status(u16 status) @@ -261,8 +277,8 @@ void nvme_queue_scan(struct nvme_ctrl *ctrl); void nvme_remove_namespaces(struct nvme_ctrl *ctrl); #define NVME_NR_AERS 1 -void nvme_complete_async_event(struct nvme_ctrl *ctrl, - struct nvme_completion *cqe); +void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, + union nvme_result *res); void nvme_queue_async_events(struct nvme_ctrl *ctrl); void nvme_stop_queues(struct nvme_ctrl *ctrl); @@ -278,7 +294,7 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, void *buf, unsigned bufflen); int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, - struct nvme_completion *cqe, void *buffer, unsigned bufflen, + union nvme_result *result, void *buffer, unsigned bufflen, unsigned timeout, int qid, int at_head, int flags); int nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, void __user *ubuffer, unsigned bufflen, u32 *result, @@ -307,36 +323,33 @@ int nvme_sg_get_version_num(int __user *ip); #ifdef CONFIG_NVM int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id); -int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node, - const struct attribute_group *attrs); +int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node); void nvme_nvm_unregister(struct nvme_ns *ns); - -static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) -{ - if (dev->type->devnode) - return dev_to_disk(dev)->private_data; - - return (container_of(dev, struct nvm_dev, dev))->private_data; -} +int nvme_nvm_register_sysfs(struct nvme_ns *ns); +void nvme_nvm_unregister_sysfs(struct nvme_ns *ns); #else static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, - int node, - const struct attribute_group *attrs) + int node) { return 0; } static inline void nvme_nvm_unregister(struct nvme_ns *ns) {}; - +static inline int nvme_nvm_register_sysfs(struct nvme_ns *ns) +{ + return 0; +} +static inline void nvme_nvm_unregister_sysfs(struct nvme_ns *ns) {}; static inline int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id) { return 0; } +#endif /* CONFIG_NVM */ + static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) { return dev_to_disk(dev)->private_data; } -#endif /* CONFIG_NVM */ int __init nvme_core_init(void); void nvme_core_exit(void); diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 5e52034..3ba38f4 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -141,6 +141,7 @@ struct nvme_queue { * allocated to store the PRP list. */ struct nvme_iod { + struct nvme_request req; struct nvme_queue *nvmeq; int aborted; int npages; /* In the PRP list. 0 means small pool in use */ @@ -302,14 +303,14 @@ static void __nvme_submit_cmd(struct nvme_queue *nvmeq, static __le64 **iod_list(struct request *req) { struct nvme_iod *iod = blk_mq_rq_to_pdu(req); - return (__le64 **)(iod->sg + req->nr_phys_segments); + return (__le64 **)(iod->sg + blk_rq_nr_phys_segments(req)); } static int nvme_init_iod(struct request *rq, unsigned size, struct nvme_dev *dev) { struct nvme_iod *iod = blk_mq_rq_to_pdu(rq); - int nseg = rq->nr_phys_segments; + int nseg = blk_rq_nr_phys_segments(rq); if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) { iod->sg = kmalloc(nvme_iod_alloc_size(dev, size, nseg), GFP_ATOMIC); @@ -324,11 +325,11 @@ static int nvme_init_iod(struct request *rq, unsigned size, iod->nents = 0; iod->length = size; - if (!(rq->cmd_flags & REQ_DONTPREP)) { + if (!(rq->rq_flags & RQF_DONTPREP)) { rq->retries = 0; - rq->cmd_flags |= REQ_DONTPREP; + rq->rq_flags |= RQF_DONTPREP; } - return 0; + return BLK_MQ_RQ_QUEUE_OK; } static void nvme_free_iod(struct nvme_dev *dev, struct request *req) @@ -339,8 +340,6 @@ static void nvme_free_iod(struct nvme_dev *dev, struct request *req) __le64 **list = iod_list(req); dma_addr_t prp_dma = iod->first_dma; - nvme_cleanup_cmd(req); - if (iod->npages == 0) dma_pool_free(dev->prp_small_pool, list[0], prp_dma); for (i = 0; i < iod->npages; i++) { @@ -510,7 +509,7 @@ static int nvme_map_data(struct nvme_dev *dev, struct request *req, DMA_TO_DEVICE : DMA_FROM_DEVICE; int ret = BLK_MQ_RQ_QUEUE_ERROR; - sg_init_table(iod->sg, req->nr_phys_segments); + sg_init_table(iod->sg, blk_rq_nr_phys_segments(req)); iod->nents = blk_rq_map_sg(q, req, iod->sg); if (!iod->nents) goto out; @@ -566,6 +565,7 @@ static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) } } + nvme_cleanup_cmd(req); nvme_free_iod(dev, req); } @@ -596,22 +596,21 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, } } - map_len = nvme_map_len(req); - ret = nvme_init_iod(req, map_len, dev); - if (ret) + ret = nvme_setup_cmd(ns, req, &cmnd); + if (ret != BLK_MQ_RQ_QUEUE_OK) return ret; - ret = nvme_setup_cmd(ns, req, &cmnd); - if (ret) - goto out; + map_len = nvme_map_len(req); + ret = nvme_init_iod(req, map_len, dev); + if (ret != BLK_MQ_RQ_QUEUE_OK) + goto out_free_cmd; - if (req->nr_phys_segments) + if (blk_rq_nr_phys_segments(req)) ret = nvme_map_data(dev, req, map_len, &cmnd); - if (ret) - goto out; + if (ret != BLK_MQ_RQ_QUEUE_OK) + goto out_cleanup_iod; - cmnd.common.command_id = req->tag; blk_mq_start_request(req); spin_lock_irq(&nvmeq->q_lock); @@ -621,14 +620,16 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx, else ret = BLK_MQ_RQ_QUEUE_ERROR; spin_unlock_irq(&nvmeq->q_lock); - goto out; + goto out_cleanup_iod; } __nvme_submit_cmd(nvmeq, &cmnd); nvme_process_cq(nvmeq); spin_unlock_irq(&nvmeq->q_lock); return BLK_MQ_RQ_QUEUE_OK; -out: +out_cleanup_iod: nvme_free_iod(dev, req); +out_free_cmd: + nvme_cleanup_cmd(req); return ret; } @@ -703,13 +704,13 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) */ if (unlikely(nvmeq->qid == 0 && cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { - nvme_complete_async_event(&nvmeq->dev->ctrl, &cqe); + nvme_complete_async_event(&nvmeq->dev->ctrl, + cqe.status, &cqe.result); continue; } req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); - if (req->cmd_type == REQ_TYPE_DRV_PRIV && req->special) - memcpy(req->special, &cqe, sizeof(cqe)); + nvme_req(req)->result = cqe.result; blk_mq_complete_request(req, le16_to_cpu(cqe.status) >> 1); } diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 3d25add..f42ab70 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -28,7 +28,6 @@ #include <rdma/ib_verbs.h> #include <rdma/rdma_cm.h> -#include <rdma/ib_cm.h> #include <linux/nvme-rdma.h> #include "nvme.h" @@ -66,6 +65,7 @@ struct nvme_rdma_qe { struct nvme_rdma_queue; struct nvme_rdma_request { + struct nvme_request req; struct ib_mr *mr; struct nvme_rdma_qe sqe; struct ib_sge sge[1 + NVME_RDMA_MAX_INLINE_SEGMENTS]; @@ -241,7 +241,9 @@ out_free_ring: static void nvme_rdma_qp_event(struct ib_event *event, void *context) { - pr_debug("QP event %d\n", event->event); + pr_debug("QP event %s (%d)\n", + ib_event_msg(event->event), event->event); + } static int nvme_rdma_wait_for_cm(struct nvme_rdma_queue *queue) @@ -963,8 +965,7 @@ static int nvme_rdma_map_data(struct nvme_rdma_queue *queue, struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq); struct nvme_rdma_device *dev = queue->device; struct ib_device *ibdev = dev->dev; - int nents, count; - int ret; + int count, ret; req->num_sge = 1; req->inline_data = false; @@ -976,16 +977,14 @@ static int nvme_rdma_map_data(struct nvme_rdma_queue *queue, return nvme_rdma_set_sg_null(c); req->sg_table.sgl = req->first_sgl; - ret = sg_alloc_table_chained(&req->sg_table, rq->nr_phys_segments, - req->sg_table.sgl); + ret = sg_alloc_table_chained(&req->sg_table, + blk_rq_nr_phys_segments(rq), req->sg_table.sgl); if (ret) return -ENOMEM; - nents = blk_rq_map_sg(rq->q, rq, req->sg_table.sgl); - BUG_ON(nents > rq->nr_phys_segments); - req->nents = nents; + req->nents = blk_rq_map_sg(rq->q, rq, req->sg_table.sgl); - count = ib_dma_map_sg(ibdev, req->sg_table.sgl, nents, + count = ib_dma_map_sg(ibdev, req->sg_table.sgl, req->nents, rq_data_dir(rq) == WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE); if (unlikely(count <= 0)) { sg_free_table_chained(&req->sg_table, true); @@ -1130,13 +1129,10 @@ static void nvme_rdma_submit_async_event(struct nvme_ctrl *arg, int aer_idx) static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue, struct nvme_completion *cqe, struct ib_wc *wc, int tag) { - u16 status = le16_to_cpu(cqe->status); struct request *rq; struct nvme_rdma_request *req; int ret = 0; - status >>= 1; - rq = blk_mq_tag_to_rq(nvme_rdma_tagset(queue), cqe->command_id); if (!rq) { dev_err(queue->ctrl->ctrl.device, @@ -1147,9 +1143,6 @@ static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue, } req = blk_mq_rq_to_pdu(rq); - if (rq->cmd_type == REQ_TYPE_DRV_PRIV && rq->special) - memcpy(rq->special, cqe, sizeof(*cqe)); - if (rq->tag == tag) ret = 1; @@ -1157,8 +1150,8 @@ static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue, wc->ex.invalidate_rkey == req->mr->rkey) req->mr->need_inval = false; - blk_mq_complete_request(rq, status); - + req->req.result = cqe->result; + blk_mq_complete_request(rq, le16_to_cpu(cqe->status) >> 1); return ret; } @@ -1186,7 +1179,8 @@ static int __nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc, int tag) */ if (unlikely(nvme_rdma_queue_idx(queue) == 0 && cqe->command_id >= NVME_RDMA_AQ_BLKMQ_DEPTH)) - nvme_complete_async_event(&queue->ctrl->ctrl, cqe); + nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status, + &cqe->result); else ret = nvme_rdma_process_nvme_rsp(queue, cqe, wc, tag); ib_dma_sync_single_for_device(ibdev, qe->dma, len, DMA_FROM_DEVICE); @@ -1433,10 +1427,9 @@ static int nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx, sizeof(struct nvme_command), DMA_TO_DEVICE); ret = nvme_setup_cmd(ns, rq, c); - if (ret) + if (ret != BLK_MQ_RQ_QUEUE_OK) return ret; - c->common.command_id = rq->tag; blk_mq_start_request(rq); map_len = nvme_map_len(rq); @@ -1944,6 +1937,14 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev, opts->queue_size = ctrl->ctrl.maxcmd; } + if (opts->queue_size > ctrl->ctrl.sqsize + 1) { + /* warn if sqsize is lower than queue_size */ + dev_warn(ctrl->ctrl.device, + "queue_size %zu > ctrl sqsize %u, clamping down\n", + opts->queue_size, ctrl->ctrl.sqsize + 1); + opts->queue_size = ctrl->ctrl.sqsize + 1; + } + if (opts->nr_io_queues) { ret = nvme_rdma_create_io_queues(ctrl); if (ret) diff --git a/drivers/nvme/host/scsi.c b/drivers/nvme/host/scsi.c index 3eaa4d2..b71e950 100644 --- a/drivers/nvme/host/scsi.c +++ b/drivers/nvme/host/scsi.c @@ -1280,10 +1280,6 @@ static inline void nvme_trans_modesel_get_bd_len(u8 *parm_list, u8 cdb10, static void nvme_trans_modesel_save_bd(struct nvme_ns *ns, u8 *parm_list, u16 idx, u16 bd_len, u8 llbaa) { - u16 bd_num; - - bd_num = bd_len / ((llbaa == 0) ? - SHORT_DESC_BLOCK : LONG_DESC_BLOCK); /* Store block descriptor info if a FORMAT UNIT comes later */ /* TODO Saving 1st BD info; what to do if multiple BD received? */ if (llbaa == 0) { @@ -1528,7 +1524,7 @@ static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr, int nvme_sc; struct nvme_id_ns *id_ns; u8 i; - u8 flbas, nlbaf; + u8 nlbaf; u8 selected_lbaf = 0xFF; u32 cdw10 = 0; struct nvme_command c; @@ -1539,7 +1535,6 @@ static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr, if (res) return res; - flbas = (id_ns->flbas) & 0x0F; nlbaf = id_ns->nlbaf; for (i = 0; i < nlbaf; i++) { @@ -2168,12 +2163,10 @@ static int nvme_trans_synchronize_cache(struct nvme_ns *ns, static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr, u8 *cmd) { - u8 immed, pcmod, no_flush, start; + u8 immed, no_flush; immed = cmd[1] & 0x01; - pcmod = cmd[3] & 0x0f; no_flush = cmd[4] & 0x04; - start = cmd[4] & 0x01; if (immed != 0) { return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION, |
