// SPDX-License-Identifier: GPL-2.0
/*
* NVMe admin command implementation.
* Copyright (c) 2015-2016 HGST, a Western Digital Company.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/rculist.h>
#include <linux/part_stat.h>
#include <generated/utsrelease.h>
#include <linux/unaligned.h>
#include "nvmet.h"
u32 nvmet_get_log_page_len(struct nvme_command *cmd)
{
u32 len = le16_to_cpu(cmd->get_log_page.numdu);
len <<= 16;
len += le16_to_cpu(cmd->get_log_page.numdl);
/* NUMD is a 0's based value */
len += 1;
len *= sizeof(u32);
return len;
}
static u32 nvmet_feat_data_len(struct nvmet_req *req, u32 cdw10)
{
switch (cdw10 & 0xff) {
case NVME_FEAT_HOST_ID:
return sizeof(req->sq->ctrl->hostid);
default:
return 0;
}
}
u64 nvmet_get_log_page_offset(struct nvme_command *cmd)
{
return le64_to_cpu(cmd->get_log_page.lpo);
}
static void nvmet_execute_get_log_page_noop(struct nvmet_req *req)
{
nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->transfer_len));
}
static void nvmet_execute_get_log_page_error(struct nvmet_req *req)
{
struct nvmet_ctrl *ctrl = req->sq->ctrl;
unsigned long flags;
off_t offset = 0;
u64 slot;
u64 i;
spin_lock_irqsave(&ctrl->error_lock, flags);
slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS;
for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) {
if (nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot],
sizeof(struct nvme_error_slot)))
break;
if (