diff options
Diffstat (limited to 'freebsd/sys/dev/nvme/nvme_ns_cmd.c')
-rw-r--r-- | freebsd/sys/dev/nvme/nvme_ns_cmd.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/freebsd/sys/dev/nvme/nvme_ns_cmd.c b/freebsd/sys/dev/nvme/nvme_ns_cmd.c new file mode 100644 index 00000000..5fe2820e --- /dev/null +++ b/freebsd/sys/dev/nvme/nvme_ns_cmd.c @@ -0,0 +1,208 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (C) 2012 Intel Corporation + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "nvme_private.h" + +int +nvme_ns_cmd_read(struct nvme_namespace *ns, void *payload, uint64_t lba, + uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg) +{ + struct nvme_request *req; + + req = nvme_allocate_request_vaddr(payload, + lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg); + + if (req == NULL) + return (ENOMEM); + + nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count); + + nvme_ctrlr_submit_io_request(ns->ctrlr, req); + + return (0); +} + +int +nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp, + nvme_cb_fn_t cb_fn, void *cb_arg) +{ + struct nvme_request *req; + uint64_t lba; + uint64_t lba_count; + + req = nvme_allocate_request_bio(bp, cb_fn, cb_arg); + + if (req == NULL) + return (ENOMEM); + + lba = bp->bio_offset / nvme_ns_get_sector_size(ns); + lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns); + nvme_ns_read_cmd(&req->cmd, ns->id, lba, lba_count); + + nvme_ctrlr_submit_io_request(ns->ctrlr, req); + + return (0); +} + +int +nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba, + uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg) +{ + struct nvme_request *req; + + req = nvme_allocate_request_vaddr(payload, + lba_count*nvme_ns_get_sector_size(ns), cb_fn, cb_arg); + + if (req == NULL) + return (ENOMEM); + + nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count); + + nvme_ctrlr_submit_io_request(ns->ctrlr, req); + + return (0); +} + +int +nvme_ns_cmd_write_bio(struct nvme_namespace *ns, struct bio *bp, + nvme_cb_fn_t cb_fn, void *cb_arg) +{ + struct nvme_request *req; + uint64_t lba; + uint64_t lba_count; + + req = nvme_allocate_request_bio(bp, cb_fn, cb_arg); + + if (req == NULL) + return (ENOMEM); + lba = bp->bio_offset / nvme_ns_get_sector_size(ns); + lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns); + nvme_ns_write_cmd(&req->cmd, ns->id, lba, lba_count); + + nvme_ctrlr_submit_io_request(ns->ctrlr, req); + + return (0); +} + +int +nvme_ns_cmd_deallocate(struct nvme_namespace *ns, void *payload, + uint8_t num_ranges, nvme_cb_fn_t cb_fn, void *cb_arg) +{ + struct nvme_request *req; + struct nvme_command *cmd; + + req = nvme_allocate_request_vaddr(payload, + num_ranges * sizeof(struct nvme_dsm_range), cb_fn, cb_arg); + + if (req == NULL) + return (ENOMEM); + + cmd = &req->cmd; + cmd->opc = NVME_OPC_DATASET_MANAGEMENT; + cmd->nsid = htole32(ns->id); + + /* TODO: create a delete command data structure */ + cmd->cdw10 = htole32(num_ranges - 1); + cmd->cdw11 = htole32(NVME_DSM_ATTR_DEALLOCATE); + + nvme_ctrlr_submit_io_request(ns->ctrlr, req); + + return (0); +} + +int +nvme_ns_cmd_flush(struct nvme_namespace *ns, nvme_cb_fn_t cb_fn, void *cb_arg) +{ + struct nvme_request *req; + + req = nvme_allocate_request_null(cb_fn, cb_arg); + + if (req == NULL) + return (ENOMEM); + + nvme_ns_flush_cmd(&req->cmd, ns->id); + nvme_ctrlr_submit_io_request(ns->ctrlr, req); + + return (0); +} + +/* Timeout = 1 sec */ +#define NVD_DUMP_TIMEOUT 200000 + +int +nvme_ns_dump(struct nvme_namespace *ns, void *virt, off_t offset, size_t len) +{ + struct nvme_completion_poll_status status; + struct nvme_request *req; + struct nvme_command *cmd; + uint64_t lba, lba_count; + int i; + + status.done = FALSE; + req = nvme_allocate_request_vaddr(virt, len, nvme_completion_poll_cb, + &status); + if (req == NULL) + return (ENOMEM); + + cmd = &req->cmd; + + if (len > 0) { + lba = offset / nvme_ns_get_sector_size(ns); + lba_count = len / nvme_ns_get_sector_size(ns); + nvme_ns_write_cmd(cmd, ns->id, lba, lba_count); + } else + nvme_ns_flush_cmd(cmd, ns->id); + + nvme_ctrlr_submit_io_request(ns->ctrlr, req); + if (req->qpair == NULL) + return (ENXIO); + + i = 0; + while ((i++ < NVD_DUMP_TIMEOUT) && (status.done == FALSE)) { + DELAY(5); + nvme_qpair_process_completions(req->qpair); + } + + /* + * Normally, when using the polling interface, we can't return a + * timeout error because we don't know when the completion routines + * will be called if the command later completes. However, in this + * case we're running a system dump, so all interrupts are turned + * off, the scheduler isn't running so there's nothing to complete + * the transaction. + */ + if (status.done == FALSE) + return (ETIMEDOUT); + + return (0); +} |