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Diffstat (limited to 'freebsd/sys/dev/nvme/nvme_ns_cmd.c')
-rw-r--r--freebsd/sys/dev/nvme/nvme_ns_cmd.c208
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);
+}