Spdk/lib/nvme/nvme_fabric.c

/*-
 *   BSD LICENSE
 *
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
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 *   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.
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 *       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
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 *   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,
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 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * NVMe over Fabrics transport-independent functions
 */

#include "nvme_internal.h"

static int
nvme_fabric_prop_set_cmd(struct spdk_nvme_ctrlr *ctrlr,
			 uint32_t offset, uint8_t size, uint64_t value)
{
	struct spdk_nvmf_fabric_prop_set_cmd cmd = {};
	struct nvme_completion_poll_status status;
	int rc;

	assert(size == SPDK_NVMF_PROP_SIZE_4 || size == SPDK_NVMF_PROP_SIZE_8);

	cmd.opcode = SPDK_NVME_OPC_FABRIC;
	cmd.fctype = SPDK_NVMF_FABRIC_COMMAND_PROPERTY_SET;
	cmd.ofst = offset;
	cmd.attrib.size = size;
	cmd.value.u64 = value;

	rc = spdk_nvme_ctrlr_cmd_admin_raw(ctrlr, (struct spdk_nvme_cmd *)&cmd,
					   NULL, 0,
					   nvme_completion_poll_cb, &status);
	if (rc < 0) {
		return rc;
	}

	if (spdk_nvme_wait_for_completion(ctrlr->adminq, &status)) {
		SPDK_ERRLOG("Property Set failed\n");
		return -1;
	}

	return 0;
}

static int
nvme_fabric_prop_get_cmd(struct spdk_nvme_ctrlr *ctrlr,
			 uint32_t offset, uint8_t size, uint64_t *value)
{
	struct spdk_nvmf_fabric_prop_set_cmd cmd = {};
	struct nvme_completion_poll_status status;
	struct spdk_nvmf_fabric_prop_get_rsp *response;
	int rc;

	assert(size == SPDK_NVMF_PROP_SIZE_4 || size == SPDK_NVMF_PROP_SIZE_8);

	cmd.opcode = SPDK_NVME_OPC_FABRIC;
	cmd.fctype = SPDK_NVMF_FABRIC_COMMAND_PROPERTY_GET;
	cmd.ofst = offset;
	cmd.attrib.size = size;

	rc = spdk_nvme_ctrlr_cmd_admin_raw(ctrlr, (struct spdk_nvme_cmd *)&cmd,
					   NULL, 0, nvme_completion_poll_cb,
					   &status);
	if (rc < 0) {
		return rc;
	}

	if (spdk_nvme_wait_for_completion(ctrlr->adminq, &status)) {
		SPDK_ERRLOG("Property Get failed\n");
		return -1;
	}

	response = (struct spdk_nvmf_fabric_prop_get_rsp *)&status.cpl;

	if (size == SPDK_NVMF_PROP_SIZE_4) {
		*value = response->value.u32.low;
	} else {
		*value = response->value.u64;
	}

	return 0;
}

int
nvme_fabric_ctrlr_set_reg_4(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint32_t value)
{
	return nvme_fabric_prop_set_cmd(ctrlr, offset, SPDK_NVMF_PROP_SIZE_4, value);
}

int
nvme_fabric_ctrlr_set_reg_8(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint64_t value)
{
	return nvme_fabric_prop_set_cmd(ctrlr, offset, SPDK_NVMF_PROP_SIZE_8, value);
}

int
nvme_fabric_ctrlr_get_reg_4(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint32_t *value)
{
	uint64_t tmp_value;
	int rc;
	rc = nvme_fabric_prop_get_cmd(ctrlr, offset, SPDK_NVMF_PROP_SIZE_4, &tmp_value);

	if (!rc) {
		*value = (uint32_t)tmp_value;
	}
	return rc;
}

int
nvme_fabric_ctrlr_get_reg_8(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint64_t *value)
{
	return nvme_fabric_prop_get_cmd(ctrlr, offset, SPDK_NVMF_PROP_SIZE_8, value);
}