Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 394 insertions, 0 deletions

diff --git a/src/spdk/examples/nvme/cmb_copy/cmb_copy.c b/src/spdk/examples/nvme/cmb_copy/cmb_copy.c
new file mode 100644
index 00000000..223133ca
--- /dev/null
+++ b/src/spdk/examples/nvme/cmb_copy/cmb_copy.c
@@ -0,0 +1,394 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Eideticom Inc.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Eideticom Inc,  nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+ *   OWNER 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 "spdk/stdinc.h"
+
+#include "spdk/env.h"
+#include "spdk/nvme.h"
+
+#define CMB_COPY_DELIM "-"
+#define CMB_COPY_READ 0
+#define CMB_COPY_WRITE 1
+
+struct nvme_io {
+	struct spdk_nvme_ctrlr *ctrlr;
+	struct spdk_nvme_transport_id trid;
+	struct spdk_nvme_qpair	*qpair;
+	struct spdk_nvme_ns *ns;
+	unsigned nsid;
+	unsigned slba;
+	unsigned nlbas;
+	uint32_t lba_size;
+	unsigned done;
+};
+
+struct cmb_t {
+	struct spdk_nvme_transport_id trid;
+	struct spdk_nvme_ctrlr *ctrlr;
+};
+
+struct config {
+	struct nvme_io read;
+	struct nvme_io write;
+	struct cmb_t   cmb;
+	size_t         copy_size;
+};
+
+static struct config g_config;
+
+/* Namespaces index from 1. Return 0 to invoke an error */
+static unsigned get_nsid(const struct spdk_nvme_transport_id *trid)
+{
+	if (!strcmp(trid->traddr, g_config.read.trid.traddr)) {
+		return g_config.read.nsid;
+	}
+	if (!strcmp(trid->traddr, g_config.write.trid.traddr)) {
+		return g_config.write.nsid;
+	}
+	return 0;
+}
+
+static int get_rw(const struct spdk_nvme_transport_id *trid)
+{
+	if (!strcmp(trid->traddr, g_config.read.trid.traddr)) {
+		return CMB_COPY_READ;
+	}
+	if (!strcmp(trid->traddr, g_config.write.trid.traddr)) {
+		return CMB_COPY_WRITE;
+	}
+	return -1;
+}
+
+static void
+check_io(void *arg, const struct spdk_nvme_cpl *completion)
+{
+	int *rw = (unsigned *)arg;
+
+	if (*rw == CMB_COPY_READ) {
+		g_config.read.done = 1;
+	} else {
+		g_config.write.done = 1;
+	}
+}
+
+static int
+cmb_copy(void)
+{
+	int rc = 0, rw;
+	void *buf;
+
+	/* Allocate QPs for the read and write controllers */
+	g_config.read.qpair = spdk_nvme_ctrlr_alloc_io_qpair(g_config.read.ctrlr, NULL, 0);
+	g_config.write.qpair = spdk_nvme_ctrlr_alloc_io_qpair(g_config.write.ctrlr, NULL, 0);
+	if (g_config.read.qpair == NULL || g_config.read.qpair == NULL) {
+		printf("ERROR: spdk_nvme_ctrlr_alloc_io_qpair() failed\n");
+		return -ENOMEM;
+	}
+
+	/* Allocate a buffer from our CMB */
+	buf = spdk_nvme_ctrlr_alloc_cmb_io_buffer(g_config.cmb.ctrlr, g_config.copy_size);
+	if (buf == NULL) {
+		printf("ERROR: buffer allocation failed\n");
+		printf("Are you sure %s has a valid CMB?\n",
+		       g_config.cmb.trid.traddr);
+		return -ENOMEM;
+	}
+
+	/* Clear the done flags */
+	g_config.read.done = 0;
+	g_config.write.done = 0;
+
+	rw = CMB_COPY_READ;
+	/* Do the read to the CMB IO buffer */
+	rc = spdk_nvme_ns_cmd_read(g_config.read.ns, g_config.read.qpair, buf,
+				   g_config.read.slba, g_config.read.nlbas,
+				   check_io, &rw, 0);
+	if (rc != 0) {
+		fprintf(stderr, "starting read I/O failed\n");
+		return -EIO;
+	}
+	while (!g_config.read.done) {
+		spdk_nvme_qpair_process_completions(g_config.read.qpair, 0);
+	}
+
+	/* Do the write from the CMB IO buffer */
+	rw = CMB_COPY_WRITE;
+	rc = spdk_nvme_ns_cmd_write(g_config.write.ns, g_config.write.qpair, buf,
+				    g_config.write.slba, g_config.write.nlbas,
+				    check_io, &rw, 0);
+	if (rc != 0) {
+		fprintf(stderr, "starting write I/O failed\n");
+		return -EIO;
+	}
+	while (!g_config.write.done) {
+		spdk_nvme_qpair_process_completions(g_config.write.qpair, 0);
+	}
+
+	/* Clear the done flags */
+	g_config.read.done = 0;
+	g_config.write.done = 0;
+
+	/* Free CMB buffer */
+	spdk_nvme_ctrlr_free_cmb_io_buffer(g_config.cmb.ctrlr, buf,
+					   g_config.copy_size);
+
+	/* Free the queues */
+	spdk_nvme_ctrlr_free_io_qpair(g_config.read.qpair);
+	spdk_nvme_ctrlr_free_io_qpair(g_config.write.qpair);
+
+	return rc;
+}
+
+static bool
+probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
+	 struct spdk_nvme_ctrlr_opts *opts)
+{
+	/* We will only attach to the read or write controller */
+	if (strcmp(trid->traddr, g_config.read.trid.traddr) &&
+	    strcmp(trid->traddr, g_config.write.trid.traddr)) {
+		printf("%s - not probed %s!\n", __func__, trid->traddr);
+		return 0;
+	}
+
+	printf("%s - probed %s!\n", __func__, trid->traddr);
+	return 1;
+}
+
+static void
+attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
+	  struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
+{
+	struct spdk_nvme_ns *ns;
+
+	ns = spdk_nvme_ctrlr_get_ns(ctrlr, get_nsid(trid));
+	if (ns == NULL) {
+		fprintf(stderr, "Could not locate namespace %d on controller %s.\n",
+			get_nsid(trid), trid->traddr);
+		exit(-1);
+	}
+	if (get_rw(trid) == CMB_COPY_READ) {
+		g_config.read.ctrlr    = ctrlr;
+		g_config.read.ns       = ns;
+		g_config.read.lba_size = spdk_nvme_ns_get_sector_size(ns);
+	} else {
+		g_config.write.ctrlr    = ctrlr;
+		g_config.write.ns       = ns;
+		g_config.write.lba_size = spdk_nvme_ns_get_sector_size(ns);
+	}
+	printf("%s - attached %s!\n", __func__, trid->traddr);
+
+	return;
+}
+
+static void
+usage(char *program_name)
+{
+	printf("%s options (all mandatory)", program_name);
+	printf("\n");
+	printf("\t[-r NVMe read parameters]\n");
+	printf("\t[-w NVMe write parameters]\n");
+	printf("\t[-c CMB to use for data buffers]\n");
+	printf("\n");
+	printf("Read/Write params:\n");
+	printf("  <pci id>-<namespace>-<start LBA>-<number of LBAs>\n");
+}
+
+static void
+parse(char *in, struct nvme_io *io)
+{
+	char *tok = NULL;
+
+	tok = strtok(in, CMB_COPY_DELIM);
+	if (tok == NULL) {
+		goto err;
+	}
+	snprintf(&io->trid.traddr[0], SPDK_NVMF_TRADDR_MAX_LEN + 1,
+		 "%s", tok);
+
+	tok = strtok(NULL, CMB_COPY_DELIM);
+	if (tok == NULL) {
+		goto err;
+	}
+	io->nsid  = atoi(tok);
+
+	tok = strtok(NULL, CMB_COPY_DELIM);
+	if (tok == NULL) {
+		goto err;
+	}
+	io->slba  = atoi(tok);
+
+	tok = strtok(NULL, CMB_COPY_DELIM);
+	if (tok == NULL) {
+		goto err;
+	}
+	io->nlbas = atoi(tok);
+
+	tok = strtok(NULL, CMB_COPY_DELIM);
+	if (tok != NULL) {
+		goto err;
+	}
+	return;
+
+err:
+	fprintf(stderr, "%s: error parsing %s\n", __func__, in);
+	exit(-1);
+
+}
+
+static int
+parse_args(int argc, char **argv)
+{
+	int op;
+	unsigned read = 0, write = 0, cmb = 0;
+
+	while ((op = getopt(argc, argv, "r:w:c:")) != -1) {
+		switch (op) {
+		case 'r':
+			parse(optarg, &g_config.read);
+			read = 1;
+			break;
+		case 'w':
+			parse(optarg, &g_config.write);
+			write = 1;
+			break;
+		case 'c':
+			snprintf(g_config.cmb.trid.traddr, SPDK_NVMF_TRADDR_MAX_LEN + 1,
+				 "%s", optarg);
+			cmb = 1;
+			break;
+		default:
+			usage(argv[0]);
+			return 1;
+		}
+	}
+
+	if ((!read || !write || !cmb)) {
+		usage(argv[0]);
+		return 1;
+	}
+
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	int rc = 0;
+	struct spdk_env_opts opts;
+
+	/*
+	 * Parse the input arguments. For now we use the following
+	 * format list:
+	 *
+	 * <pci id>-<namespace>-<start LBA>-<number of LBAs>
+	 *
+	 */
+	rc = parse_args(argc, argv);
+	if (rc) {
+		fprintf(stderr, "Error in parse_args(): %d\n",
+			rc);
+		return -1;
+	}
+
+	/*
+	 * SPDK relies on an abstraction around the local environment
+	 * named env that handles memory allocation and PCI device operations.
+	 * This library must be initialized first.
+	 *
+	 */
+	spdk_env_opts_init(&opts);
+	opts.name = "cmb_copy";
+	opts.shm_id = 0;
+	if (spdk_env_init(&opts) < 0) {
+		fprintf(stderr, "Unable to initialize SPDK env\n");
+		return 1;
+	}
+
+	/*
+	 * CMBs only apply to PCIe attached NVMe controllers so we
+	 * only probe the PCIe bus. This is the default when we pass
+	 * in NULL for the first argument.
+	 */
+
+	rc = spdk_nvme_probe(NULL, NULL, probe_cb, attach_cb, NULL);
+	if (rc) {
+		fprintf(stderr, "Error in spdk_nvme_probe(): %d\n",
+			rc);
+		return -1;
+	}
+
+	/*
+	 * For now enforce that the read and write controller are not
+	 * the same. This avoids an internal only DMA.
+	 */
+	if (!strcmp(g_config.write.trid.traddr, g_config.read.trid.traddr)) {
+		fprintf(stderr, "Read and Write controllers must differ!\n");
+		return -1;
+	}
+
+	/*
+	 * Perform a few sanity checks and set the buffer size for the
+	 * CMB.
+	 */
+	if (g_config.read.nlbas * g_config.read.lba_size !=
+	    g_config.write.nlbas * g_config.write.lba_size) {
+		fprintf(stderr, "Read and write sizes do not match!\n");
+		return -1;
+	}
+	g_config.copy_size = g_config.read.nlbas * g_config.read.lba_size;
+
+	/*
+	 * Get the ctrlr pointer for the CMB. For now we assume this
+	 * is either the read or write NVMe controller though in
+	 * theory that is not a necessary condition.
+	 */
+
+	if (!strcmp(g_config.cmb.trid.traddr, g_config.read.trid.traddr)) {
+		g_config.cmb.ctrlr = g_config.read.ctrlr;
+	}
+	if (!strcmp(g_config.cmb.trid.traddr, g_config.write.trid.traddr)) {
+		g_config.cmb.ctrlr = g_config.write.ctrlr;
+	}
+
+	/*
+	 * Call the cmb_copy() function which performs the CMB
+	 * based copy or returns an error code if it fails.
+	 */
+	rc = cmb_copy();
+	if (rc) {
+		fprintf(stderr, "Error in spdk_cmb_copy(): %d\n",
+			rc);
+		return -1;
+	}
+
+	return rc;
+}