Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 2466 insertions, 0 deletions

diff --git a/block/sed-opal.c b/block/sed-opal.c
new file mode 100644
index 000000000..119640897
--- /dev/null
+++ b/block/sed-opal.c
@@ -0,0 +1,2466 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Authors:
+ *    Scott  Bauer      <scott.bauer@intel.com>
+ *    Rafael Antognolli <rafael.antognolli@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":OPAL: " fmt
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/genhd.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <uapi/linux/sed-opal.h>
+#include <linux/sed-opal.h>
+#include <linux/string.h>
+#include <linux/kdev_t.h>
+
+#include "opal_proto.h"
+
+#define IO_BUFFER_LENGTH 2048
+#define MAX_TOKS 64
+
+struct opal_step {
+	int (*fn)(struct opal_dev *dev, void *data);
+	void *data;
+};
+typedef int (cont_fn)(struct opal_dev *dev);
+
+enum opal_atom_width {
+	OPAL_WIDTH_TINY,
+	OPAL_WIDTH_SHORT,
+	OPAL_WIDTH_MEDIUM,
+	OPAL_WIDTH_LONG,
+	OPAL_WIDTH_TOKEN
+};
+
+/*
+ * On the parsed response, we don't store again the toks that are already
+ * stored in the response buffer. Instead, for each token, we just store a
+ * pointer to the position in the buffer where the token starts, and the size
+ * of the token in bytes.
+ */
+struct opal_resp_tok {
+	const u8 *pos;
+	size_t len;
+	enum opal_response_token type;
+	enum opal_atom_width width;
+	union {
+		u64 u;
+		s64 s;
+	} stored;
+};
+
+/*
+ * From the response header it's not possible to know how many tokens there are
+ * on the payload. So we hardcode that the maximum will be MAX_TOKS, and later
+ * if we start dealing with messages that have more than that, we can increase
+ * this number. This is done to avoid having to make two passes through the
+ * response, the first one counting how many tokens we have and the second one
+ * actually storing the positions.
+ */
+struct parsed_resp {
+	int num;
+	struct opal_resp_tok toks[MAX_TOKS];
+};
+
+struct opal_dev {
+	bool supported;
+	bool mbr_enabled;
+
+	void *data;
+	sec_send_recv *send_recv;
+
+	const struct opal_step *steps;
+	struct mutex dev_lock;
+	u16 comid;
+	u32 hsn;
+	u32 tsn;
+	u64 align;
+	u64 lowest_lba;
+
+	size_t pos;
+	u8 cmd[IO_BUFFER_LENGTH];
+	u8 resp[IO_BUFFER_LENGTH];
+
+	struct parsed_resp parsed;
+	size_t prev_d_len;
+	void *prev_data;
+
+	struct list_head unlk_lst;
+};
+
+
+static const u8 opaluid[][OPAL_UID_LENGTH] = {
+	/* users */
+	[OPAL_SMUID_UID] =
+		{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff },
+	[OPAL_THISSP_UID] =
+		{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 },
+	[OPAL_ADMINSP_UID] =
+		{ 0x00, 0x00, 0x02, 0x05, 0x00, 0x00, 0x00, 0x01 },
+	[OPAL_LOCKINGSP_UID] =
+		{ 0x00, 0x00, 0x02, 0x05, 0x00, 0x00, 0x00, 0x02 },
+	[OPAL_ENTERPRISE_LOCKINGSP_UID] =
+		{ 0x00, 0x00, 0x02, 0x05, 0x00, 0x01, 0x00, 0x01 },
+	[OPAL_ANYBODY_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x01 },
+	[OPAL_SID_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x06 },
+	[OPAL_ADMIN1_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x01, 0x00, 0x01 },
+	[OPAL_USER1_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x03, 0x00, 0x01 },
+	[OPAL_USER2_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x03, 0x00, 0x02 },
+	[OPAL_PSID_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x01, 0xff, 0x01 },
+	[OPAL_ENTERPRISE_BANDMASTER0_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x80, 0x01 },
+	[OPAL_ENTERPRISE_ERASEMASTER_UID] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x84, 0x01 },
+
+	/* tables */
+
+	[OPAL_LOCKINGRANGE_GLOBAL] =
+		{ 0x00, 0x00, 0x08, 0x02, 0x00, 0x00, 0x00, 0x01 },
+	[OPAL_LOCKINGRANGE_ACE_RDLOCKED] =
+		{ 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xE0, 0x01 },
+	[OPAL_LOCKINGRANGE_ACE_WRLOCKED] =
+		{ 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xE8, 0x01 },
+	[OPAL_MBRCONTROL] =
+		{ 0x00, 0x00, 0x08, 0x03, 0x00, 0x00, 0x00, 0x01 },
+	[OPAL_MBR] =
+		{ 0x00, 0x00, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00 },
+	[OPAL_AUTHORITY_TABLE] =
+		{ 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x00},
+	[OPAL_C_PIN_TABLE] =
+		{ 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x00, 0x00},
+	[OPAL_LOCKING_INFO_TABLE] =
+		{ 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x01 },
+	[OPAL_ENTERPRISE_LOCKING_INFO_TABLE] =
+		{ 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x00 },
+
+	/* C_PIN_TABLE object ID's */
+
+        [OPAL_C_PIN_MSID] =
+		{ 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x84, 0x02},
+	[OPAL_C_PIN_SID] =
+		{ 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x00, 0x01},
+	[OPAL_C_PIN_ADMIN1] =
+		{ 0x00, 0x00, 0x00, 0x0B, 0x00, 0x01, 0x00, 0x01},
+
+	/* half UID's (only first 4 bytes used) */
+
+	[OPAL_HALF_UID_AUTHORITY_OBJ_REF] =
+		{ 0x00, 0x00, 0x0C, 0x05, 0xff, 0xff, 0xff, 0xff },
+	[OPAL_HALF_UID_BOOLEAN_ACE] =
+		{ 0x00, 0x00, 0x04, 0x0E, 0xff, 0xff, 0xff, 0xff },
+
+	/* special value for omitted optional parameter */
+	[OPAL_UID_HEXFF] =
+		{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
+};
+
+/*
+ * TCG Storage SSC Methods.
+ * Derived from: TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
+ * Section: 6.3 Assigned UIDs
+ */
+static const u8 opalmethod[][OPAL_UID_LENGTH] = {
+	[OPAL_PROPERTIES] =
+		{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x01 },
+	[OPAL_STARTSESSION] =
+		{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x02 },
+	[OPAL_REVERT] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x02, 0x02 },
+	[OPAL_ACTIVATE] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x02, 0x03 },
+	[OPAL_EGET] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x06 },
+	[OPAL_ESET] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x07 },
+	[OPAL_NEXT] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x08 },
+	[OPAL_EAUTHENTICATE] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x0c },
+	[OPAL_GETACL] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x0d },
+	[OPAL_GENKEY] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x10 },
+	[OPAL_REVERTSP] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x11 },
+	[OPAL_GET] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x16 },
+	[OPAL_SET] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x17 },
+	[OPAL_AUTHENTICATE] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x1c },
+	[OPAL_RANDOM] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x01 },
+	[OPAL_ERASE] =
+		{ 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x08, 0x03 },
+};
+
+static int end_opal_session_error(struct opal_dev *dev);
+
+struct opal_suspend_data {
+	struct opal_lock_unlock unlk;
+	u8 lr;
+	struct list_head node;
+};
+
+/*
+ * Derived from:
+ * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00
+ * Section: 5.1.5 Method Status Codes
+ */
+static const char * const opal_errors[] = {
+	"Success",
+	"Not Authorized",
+	"Unknown Error",
+	"SP Busy",
+	"SP Failed",
+	"SP Disabled",
+	"SP Frozen",
+	"No Sessions Available",
+	"Uniqueness Conflict",
+	"Insufficient Space",
+	"Insufficient Rows",
+	"Invalid Function",
+	"Invalid Parameter",
+	"Invalid Reference",
+	"Unknown Error",
+	"TPER Malfunction",
+	"Transaction Failure",
+	"Response Overflow",
+	"Authority Locked Out",
+};
+
+static const char *opal_error_to_human(int error)
+{
+	if (error == 0x3f)
+		return "Failed";
+
+	if (error >= ARRAY_SIZE(opal_errors) || error < 0)
+		return "Unknown Error";
+
+	return opal_errors[error];
+}
+
+static void print_buffer(const u8 *ptr, u32 length)
+{
+#ifdef DEBUG
+	print_hex_dump_bytes("OPAL: ", DUMP_PREFIX_OFFSET, ptr, length);
+	pr_debug("\n");
+#endif
+}
+
+static bool check_tper(const void *data)
+{
+	const struct d0_tper_features *tper = data;
+	u8 flags = tper->supported_features;
+
+	if (!(flags & TPER_SYNC_SUPPORTED)) {
+		pr_debug("TPer sync not supported. flags = %d\n",
+			 tper->supported_features);
+		return false;
+	}
+
+	return true;
+}
+
+static bool check_mbrenabled(const void *data)
+{
+	const struct d0_locking_features *lfeat = data;
+	u8 sup_feat = lfeat->supported_features;
+
+	return !!(sup_feat & MBR_ENABLED_MASK);
+}
+
+static bool check_sum(const void *data)
+{
+	const struct d0_single_user_mode *sum = data;
+	u32 nlo = be32_to_cpu(sum->num_locking_objects);
+
+	if (nlo == 0) {
+		pr_debug("Need at least one locking object.\n");
+		return false;
+	}
+
+	pr_debug("Number of locking objects: %d\n", nlo);
+
+	return true;
+}
+
+static u16 get_comid_v100(const void *data)
+{
+	const struct d0_opal_v100 *v100 = data;
+
+	return be16_to_cpu(v100->baseComID);
+}
+
+static u16 get_comid_v200(const void *data)
+{
+	const struct d0_opal_v200 *v200 = data;
+
+	return be16_to_cpu(v200->baseComID);
+}
+
+static int opal_send_cmd(struct opal_dev *dev)
+{
+	return dev->send_recv(dev->data, dev->comid, TCG_SECP_01,
+			      dev->cmd, IO_BUFFER_LENGTH,
+			      true);
+}
+
+static int opal_recv_cmd(struct opal_dev *dev)
+{
+	return dev->send_recv(dev->data, dev->comid, TCG_SECP_01,
+			      dev->resp, IO_BUFFER_LENGTH,
+			      false);
+}
+
+static int opal_recv_check(struct opal_dev *dev)
+{
+	size_t buflen = IO_BUFFER_LENGTH;
+	void *buffer = dev->resp;
+	struct opal_header *hdr = buffer;
+	int ret;
+
+	do {
+		pr_debug("Sent OPAL command: outstanding=%d, minTransfer=%d\n",
+			 hdr->cp.outstandingData,
+			 hdr->cp.minTransfer);
+
+		if (hdr->cp.outstandingData == 0 ||
+		    hdr->cp.minTransfer != 0)
+			return 0;
+
+		memset(buffer, 0, buflen);
+		ret = opal_recv_cmd(dev);
+	} while (!ret);
+
+	return ret;
+}
+
+static int opal_send_recv(struct opal_dev *dev, cont_fn *cont)
+{
+	int ret;
+
+	ret = opal_send_cmd(dev);
+	if (ret)
+		return ret;
+	ret = opal_recv_cmd(dev);
+	if (ret)
+		return ret;
+	ret = opal_recv_check(dev);
+	if (ret)
+		return ret;
+	return cont(dev);
+}
+
+static void check_geometry(struct opal_dev *dev, const void *data)
+{
+	const struct d0_geometry_features *geo = data;
+
+	dev->align = geo->alignment_granularity;
+	dev->lowest_lba = geo->lowest_aligned_lba;
+}
+
+static int next(struct opal_dev *dev)
+{
+	const struct opal_step *step;
+	int state = 0, error = 0;
+
+	do {
+		step = &dev->steps[state];
+		if (!step->fn)
+			break;
+
+		error = step->fn(dev, step->data);
+		if (error) {
+			pr_debug("Error on step function: %d with error %d: %s\n",
+				 state, error,
+				 opal_error_to_human(error));
+
+			/* For each OPAL command we do a discovery0 then we
+			 * start some sort of session.
+			 * If we haven't passed state 1 then there was an error
+			 * on discovery0 or during the attempt to start a
+			 * session. Therefore we shouldn't attempt to terminate
+			 * a session, as one has not yet been created.
+			 */
+			if (state > 1) {
+				end_opal_session_error(dev);
+				return error;
+			}
+
+		}
+		state++;
+	} while (!error);
+
+	return error;
+}
+
+static int opal_discovery0_end(struct opal_dev *dev)
+{
+	bool found_com_id = false, supported = true, single_user = false;
+	const struct d0_header *hdr = (struct d0_header *)dev->resp;
+	const u8 *epos = dev->resp, *cpos = dev->resp;
+	u16 comid = 0;
+	u32 hlen = be32_to_cpu(hdr->length);
+
+	print_buffer(dev->resp, hlen);
+	dev->mbr_enabled = false;
+
+	if (hlen > IO_BUFFER_LENGTH - sizeof(*hdr)) {
+		pr_debug("Discovery length overflows buffer (%zu+%u)/%u\n",
+			 sizeof(*hdr), hlen, IO_BUFFER_LENGTH);
+		return -EFAULT;
+	}
+
+	epos += hlen; /* end of buffer */
+	cpos += sizeof(*hdr); /* current position on buffer */
+
+	while (cpos < epos && supported) {
+		const struct d0_features *body =
+			(const struct d0_features *)cpos;
+
+		switch (be16_to_cpu(body->code)) {
+		case FC_TPER:
+			supported = check_tper(body->features);
+			break;
+		case FC_SINGLEUSER:
+			single_user = check_sum(body->features);
+			break;
+		case FC_GEOMETRY:
+			check_geometry(dev, body);
+			break;
+		case FC_LOCKING:
+			dev->mbr_enabled = check_mbrenabled(body->features);
+			break;
+		case FC_ENTERPRISE:
+		case FC_DATASTORE:
+			/* some ignored properties */
+			pr_debug("Found OPAL feature description: %d\n",
+				 be16_to_cpu(body->code));
+			break;
+		case FC_OPALV100:
+			comid = get_comid_v100(body->features);
+			found_com_id = true;
+			break;
+		case FC_OPALV200:
+			comid = get_comid_v200(body->features);
+			found_com_id = true;
+			break;
+		case 0xbfff ... 0xffff:
+			/* vendor specific, just ignore */
+			break;
+		default:
+			pr_debug("OPAL Unknown feature: %d\n",
+				 be16_to_cpu(body->code));
+
+		}
+		cpos += body->length + 4;
+	}
+
+	if (!supported) {
+		pr_debug("This device is not Opal enabled. Not Supported!\n");
+		return -EOPNOTSUPP;
+	}
+
+	if (!single_user)
+		pr_debug("Device doesn't support single user mode\n");
+
+
+	if (!found_com_id) {
+		pr_debug("Could not find OPAL comid for device. Returning early\n");
+		return -EOPNOTSUPP;
+	}
+
+	dev->comid = comid;
+
+	return 0;
+}
+
+static int opal_discovery0(struct opal_dev *dev, void *data)
+{
+	int ret;
+
+	memset(dev->resp, 0, IO_BUFFER_LENGTH);
+	dev->comid = OPAL_DISCOVERY_COMID;
+	ret = opal_recv_cmd(dev);
+	if (ret)
+		return ret;
+	return opal_discovery0_end(dev);
+}
+
+static void add_token_u8(int *err, struct opal_dev *cmd, u8 tok)
+{
+	if (*err)
+		return;
+	if (cmd->pos >= IO_BUFFER_LENGTH - 1) {
+		pr_debug("Error adding u8: end of buffer.\n");
+		*err = -ERANGE;
+		return;
+	}
+	cmd->cmd[cmd->pos++] = tok;
+}
+
+static void add_short_atom_header(struct opal_dev *cmd, bool bytestring,
+				  bool has_sign, int len)
+{
+	u8 atom;
+	int err = 0;
+
+	atom = SHORT_ATOM_ID;
+	atom |= bytestring ? SHORT_ATOM_BYTESTRING : 0;
+	atom |= has_sign ? SHORT_ATOM_SIGNED : 0;
+	atom |= len & SHORT_ATOM_LEN_MASK;
+
+	add_token_u8(&err, cmd, atom);
+}
+
+static void add_medium_atom_header(struct opal_dev *cmd, bool bytestring,
+				   bool has_sign, int len)
+{
+	u8 header0;
+
+	header0 = MEDIUM_ATOM_ID;
+	header0 |= bytestring ? MEDIUM_ATOM_BYTESTRING : 0;
+	header0 |= has_sign ? MEDIUM_ATOM_SIGNED : 0;
+	header0 |= (len >> 8) & MEDIUM_ATOM_LEN_MASK;
+	cmd->cmd[cmd->pos++] = header0;
+	cmd->cmd[cmd->pos++] = len;
+}
+
+static void add_token_u64(int *err, struct opal_dev *cmd, u64 number)
+{
+
+	size_t len;
+	int msb;
+
+	if (!(number & ~TINY_ATOM_DATA_MASK)) {
+		add_token_u8(err, cmd, number);
+		return;
+	}
+
+	msb = fls64(number);
+	len = DIV_ROUND_UP(msb, 8);
+
+	if (cmd->pos >= IO_BUFFER_LENGTH - len - 1) {
+		pr_debug("Error adding u64: end of buffer.\n");
+		*err = -ERANGE;
+		return;
+	}
+	add_short_atom_header(cmd, false, false, len);
+	while (len--)
+		add_token_u8(err, cmd, number >> (len * 8));
+}
+
+static void add_token_bytestring(int *err, struct opal_dev *cmd,
+				 const u8 *bytestring, size_t len)
+{
+	size_t header_len = 1;
+	bool is_short_atom = true;
+
+	if (*err)
+		return;
+
+	if (len & ~SHORT_ATOM_LEN_MASK) {
+		header_len = 2;
+		is_short_atom = false;
+	}
+
+	if (len >= IO_BUFFER_LENGTH - cmd->pos - header_len) {
+		pr_debug("Error adding bytestring: end of buffer.\n");
+		*err = -ERANGE;
+		return;
+	}
+
+	if (is_short_atom)
+		add_short_atom_header(cmd, true, false, len);
+	else
+		add_medium_atom_header(cmd, true, false, len);
+
+	memcpy(&cmd->cmd[cmd->pos], bytestring, len);
+	cmd->pos += len;
+
+}
+
+static int build_locking_range(u8 *buffer, size_t length, u8 lr)
+{
+	if (length > OPAL_UID_LENGTH) {
+		pr_debug("Can't build locking range. Length OOB\n");
+		return -ERANGE;
+	}
+
+	memcpy(buffer, opaluid[OPAL_LOCKINGRANGE_GLOBAL], OPAL_UID_LENGTH);
+
+	if (lr == 0)
+		return 0;
+	buffer[5] = LOCKING_RANGE_NON_GLOBAL;
+	buffer[7] = lr;
+
+	return 0;
+}
+
+static int build_locking_user(u8 *buffer, size_t length, u8 lr)
+{
+	if (length > OPAL_UID_LENGTH) {
+		pr_debug("Can't build locking range user, Length OOB\n");
+		return -ERANGE;
+	}
+
+	memcpy(buffer, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH);
+
+	buffer[7] = lr + 1;
+
+	return 0;
+}
+
+static void set_comid(struct opal_dev *cmd, u16 comid)
+{
+	struct opal_header *hdr = (struct opal_header *)cmd->cmd;
+
+	hdr->cp.extendedComID[0] = comid >> 8;
+	hdr->cp.extendedComID[1] = comid;
+	hdr->cp.extendedComID[2] = 0;
+	hdr->cp.extendedComID[3] = 0;
+}
+
+static int cmd_finalize(struct opal_dev *cmd, u32 hsn, u32 tsn)
+{
+	struct opal_header *hdr;
+	int err = 0;
+
+	add_token_u8(&err, cmd, OPAL_ENDOFDATA);
+	add_token_u8(&err, cmd, OPAL_STARTLIST);
+	add_token_u8(&err, cmd, 0);
+	add_token_u8(&err, cmd, 0);
+	add_token_u8(&err, cmd, 0);
+	add_token_u8(&err, cmd, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error finalizing command.\n");
+		return -EFAULT;
+	}
+
+	hdr = (struct opal_header *) cmd->cmd;
+
+	hdr->pkt.tsn = cpu_to_be32(tsn);
+	hdr->pkt.hsn = cpu_to_be32(hsn);
+
+	hdr->subpkt.length = cpu_to_be32(cmd->pos - sizeof(*hdr));
+	while (cmd->pos % 4) {
+		if (cmd->pos >= IO_BUFFER_LENGTH) {
+			pr_debug("Error: Buffer overrun\n");
+			return -ERANGE;
+		}
+		cmd->cmd[cmd->pos++] = 0;
+	}
+	hdr->pkt.length = cpu_to_be32(cmd->pos - sizeof(hdr->cp) -
+				      sizeof(hdr->pkt));
+	hdr->cp.length = cpu_to_be32(cmd->pos - sizeof(hdr->cp));
+
+	return 0;
+}
+
+static const struct opal_resp_tok *response_get_token(
+				const struct parsed_resp *resp,
+				int n)
+{
+	const struct opal_resp_tok *tok;
+
+	if (n >= resp->num) {
+		pr_debug("Token number doesn't exist: %d, resp: %d\n",
+			 n, resp->num);
+		return ERR_PTR(-EINVAL);
+	}
+
+	tok = &resp->toks[n];
+	if (tok->len == 0) {
+		pr_debug("Token length must be non-zero\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	return tok;
+}
+
+static ssize_t response_parse_tiny(struct opal_resp_tok *tok,
+				   const u8 *pos)
+{
+	tok->pos = pos;
+	tok->len = 1;
+	tok->width = OPAL_WIDTH_TINY;
+
+	if (pos[0] & TINY_ATOM_SIGNED) {
+		tok->type = OPAL_DTA_TOKENID_SINT;
+	} else {
+		tok->type = OPAL_DTA_TOKENID_UINT;
+		tok->stored.u = pos[0] & 0x3f;
+	}
+
+	return tok->len;
+}
+
+static ssize_t response_parse_short(struct opal_resp_tok *tok,
+				    const u8 *pos)
+{
+	tok->pos = pos;
+	tok->len = (pos[0] & SHORT_ATOM_LEN_MASK) + 1;
+	tok->width = OPAL_WIDTH_SHORT;
+
+	if (pos[0] & SHORT_ATOM_BYTESTRING) {
+		tok->type = OPAL_DTA_TOKENID_BYTESTRING;
+	} else if (pos[0] & SHORT_ATOM_SIGNED) {
+		tok->type = OPAL_DTA_TOKENID_SINT;
+	} else {
+		u64 u_integer = 0;
+		ssize_t i, b = 0;
+
+		tok->type = OPAL_DTA_TOKENID_UINT;
+		if (tok->len > 9) {
+			pr_debug("uint64 with more than 8 bytes\n");
+			return -EINVAL;
+		}
+		for (i = tok->len - 1; i > 0; i--) {
+			u_integer |= ((u64)pos[i] << (8 * b));
+			b++;
+		}
+		tok->stored.u = u_integer;
+	}
+
+	return tok->len;
+}
+
+static ssize_t response_parse_medium(struct opal_resp_tok *tok,
+				     const u8 *pos)
+{
+	tok->pos = pos;
+	tok->len = (((pos[0] & MEDIUM_ATOM_LEN_MASK) << 8) | pos[1]) + 2;
+	tok->width = OPAL_WIDTH_MEDIUM;
+
+	if (pos[0] & MEDIUM_ATOM_BYTESTRING)
+		tok->type = OPAL_DTA_TOKENID_BYTESTRING;
+	else if (pos[0] & MEDIUM_ATOM_SIGNED)
+		tok->type = OPAL_DTA_TOKENID_SINT;
+	else
+		tok->type = OPAL_DTA_TOKENID_UINT;
+
+	return tok->len;
+}
+
+static ssize_t response_parse_long(struct opal_resp_tok *tok,
+				   const u8 *pos)
+{
+	tok->pos = pos;
+	tok->len = ((pos[1] << 16) | (pos[2] << 8) | pos[3]) + 4;
+	tok->width = OPAL_WIDTH_LONG;
+
+	if (pos[0] & LONG_ATOM_BYTESTRING)
+		tok->type = OPAL_DTA_TOKENID_BYTESTRING;
+	else if (pos[0] & LONG_ATOM_SIGNED)
+		tok->type = OPAL_DTA_TOKENID_SINT;
+	else
+		tok->type = OPAL_DTA_TOKENID_UINT;
+
+	return tok->len;
+}
+
+static ssize_t response_parse_token(struct opal_resp_tok *tok,
+				    const u8 *pos)
+{
+	tok->pos = pos;
+	tok->len = 1;
+	tok->type = OPAL_DTA_TOKENID_TOKEN;
+	tok->width = OPAL_WIDTH_TOKEN;
+
+	return tok->len;
+}
+
+static int response_parse(const u8 *buf, size_t length,
+			  struct parsed_resp *resp)
+{
+	const struct opal_header *hdr;
+	struct opal_resp_tok *iter;
+	int num_entries = 0;
+	int total;
+	ssize_t token_length;
+	const u8 *pos;
+	u32 clen, plen, slen;
+
+	if (!buf)
+		return -EFAULT;
+
+	if (!resp)
+		return -EFAULT;
+
+	hdr = (struct opal_header *)buf;
+	pos = buf;
+	pos += sizeof(*hdr);
+
+	clen = be32_to_cpu(hdr->cp.length);
+	plen = be32_to_cpu(hdr->pkt.length);
+	slen = be32_to_cpu(hdr->subpkt.length);
+	pr_debug("Response size: cp: %u, pkt: %u, subpkt: %u\n",
+		 clen, plen, slen);
+
+	if (clen == 0 || plen == 0 || slen == 0 ||
+	    slen > IO_BUFFER_LENGTH - sizeof(*hdr)) {
+		pr_debug("Bad header length. cp: %u, pkt: %u, subpkt: %u\n",
+			 clen, plen, slen);
+		print_buffer(pos, sizeof(*hdr));
+		return -EINVAL;
+	}
+
+	if (pos > buf + length)
+		return -EFAULT;
+
+	iter = resp->toks;
+	total = slen;
+	print_buffer(pos, total);
+	while (total > 0) {
+		if (pos[0] <= TINY_ATOM_BYTE) /* tiny atom */
+			token_length = response_parse_tiny(iter, pos);
+		else if (pos[0] <= SHORT_ATOM_BYTE) /* short atom */
+			token_length = response_parse_short(iter, pos);
+		else if (pos[0] <= MEDIUM_ATOM_BYTE) /* medium atom */
+			token_length = response_parse_medium(iter, pos);
+		else if (pos[0] <= LONG_ATOM_BYTE) /* long atom */
+			token_length = response_parse_long(iter, pos);
+		else /* TOKEN */
+			token_length = response_parse_token(iter, pos);
+
+		if (token_length < 0)
+			return token_length;
+
+		pos += token_length;
+		total -= token_length;
+		iter++;
+		num_entries++;
+	}
+
+	if (num_entries == 0) {
+		pr_debug("Couldn't parse response.\n");
+		return -EINVAL;
+	}
+	resp->num = num_entries;
+
+	return 0;
+}
+
+static size_t response_get_string(const struct parsed_resp *resp, int n,
+				  const char **store)
+{
+	u8 skip;
+	const struct opal_resp_tok *token;
+
+	*store = NULL;
+	if (!resp) {
+		pr_debug("Response is NULL\n");
+		return 0;
+	}
+
+	if (n >= resp->num) {
+		pr_debug("Response has %d tokens. Can't access %d\n",
+			 resp->num, n);
+		return 0;
+	}
+
+	token = &resp->toks[n];
+	if (token->type != OPAL_DTA_TOKENID_BYTESTRING) {
+		pr_debug("Token is not a byte string!\n");
+		return 0;
+	}
+
+	switch (token->width) {
+	case OPAL_WIDTH_TINY:
+	case OPAL_WIDTH_SHORT:
+		skip = 1;
+		break;
+	case OPAL_WIDTH_MEDIUM:
+		skip = 2;
+		break;
+	case OPAL_WIDTH_LONG:
+		skip = 4;
+		break;
+	default:
+		pr_debug("Token has invalid width!\n");
+		return 0;
+	}
+
+	*store = token->pos + skip;
+	return token->len - skip;
+}
+
+static u64 response_get_u64(const struct parsed_resp *resp, int n)
+{
+	if (!resp) {
+		pr_debug("Response is NULL\n");
+		return 0;
+	}
+
+	if (n >= resp->num) {
+		pr_debug("Response has %d tokens. Can't access %d\n",
+			 resp->num, n);
+		return 0;
+	}
+
+	if (resp->toks[n].type != OPAL_DTA_TOKENID_UINT) {
+		pr_debug("Token is not unsigned it: %d\n",
+			 resp->toks[n].type);
+		return 0;
+	}
+
+	if (!(resp->toks[n].width == OPAL_WIDTH_TINY ||
+	      resp->toks[n].width == OPAL_WIDTH_SHORT)) {
+		pr_debug("Atom is not short or tiny: %d\n",
+			 resp->toks[n].width);
+		return 0;
+	}
+
+	return resp->toks[n].stored.u;
+}
+
+static bool response_token_matches(const struct opal_resp_tok *token, u8 match)
+{
+	if (IS_ERR(token) ||
+	    token->type != OPAL_DTA_TOKENID_TOKEN ||
+	    token->pos[0] != match)
+		return false;
+	return true;
+}
+
+static u8 response_status(const struct parsed_resp *resp)
+{
+	const struct opal_resp_tok *tok;
+
+	tok = response_get_token(resp, 0);
+	if (response_token_matches(tok, OPAL_ENDOFSESSION))
+		return 0;
+
+	if (resp->num < 5)
+		return DTAERROR_NO_METHOD_STATUS;
+
+	tok = response_get_token(resp, resp->num - 5);
+	if (!response_token_matches(tok, OPAL_STARTLIST))
+		return DTAERROR_NO_METHOD_STATUS;
+
+	tok = response_get_token(resp, resp->num - 1);
+	if (!response_token_matches(tok, OPAL_ENDLIST))
+		return DTAERROR_NO_METHOD_STATUS;
+
+	return response_get_u64(resp, resp->num - 4);
+}
+
+/* Parses and checks for errors */
+static int parse_and_check_status(struct opal_dev *dev)
+{
+	int error;
+
+	print_buffer(dev->cmd, dev->pos);
+
+	error = response_parse(dev->resp, IO_BUFFER_LENGTH, &dev->parsed);
+	if (error) {
+		pr_debug("Couldn't parse response.\n");
+		return error;
+	}
+
+	return response_status(&dev->parsed);
+}
+
+static void clear_opal_cmd(struct opal_dev *dev)
+{
+	dev->pos = sizeof(struct opal_header);
+	memset(dev->cmd, 0, IO_BUFFER_LENGTH);
+}
+
+static int start_opal_session_cont(struct opal_dev *dev)
+{
+	u32 hsn, tsn;
+	int error = 0;
+
+	error = parse_and_check_status(dev);
+	if (error)
+		return error;
+
+	hsn = response_get_u64(&dev->parsed, 4);
+	tsn = response_get_u64(&dev->parsed, 5);
+
+	if (hsn == 0 && tsn == 0) {
+		pr_debug("Couldn't authenticate session\n");
+		return -EPERM;
+	}
+
+	dev->hsn = hsn;
+	dev->tsn = tsn;
+	return 0;
+}
+
+static void add_suspend_info(struct opal_dev *dev,
+			     struct opal_suspend_data *sus)
+{
+	struct opal_suspend_data *iter;
+
+	list_for_each_entry(iter, &dev->unlk_lst, node) {
+		if (iter->lr == sus->lr) {
+			list_del(&iter->node);
+			kfree(iter);
+			break;
+		}
+	}
+	list_add_tail(&sus->node, &dev->unlk_lst);
+}
+
+static int end_session_cont(struct opal_dev *dev)
+{
+	dev->hsn = 0;
+	dev->tsn = 0;
+	return parse_and_check_status(dev);
+}
+
+static int finalize_and_send(struct opal_dev *dev, cont_fn cont)
+{
+	int ret;
+
+	ret = cmd_finalize(dev, dev->hsn, dev->tsn);
+	if (ret) {
+		pr_debug("Error finalizing command buffer: %d\n", ret);
+		return ret;
+	}
+
+	print_buffer(dev->cmd, dev->pos);
+
+	return opal_send_recv(dev, cont);
+}
+
+static int gen_key(struct opal_dev *dev, void *data)
+{
+	u8 uid[OPAL_UID_LENGTH];
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	memcpy(uid, dev->prev_data, min(sizeof(uid), dev->prev_d_len));
+	kfree(dev->prev_data);
+	dev->prev_data = NULL;
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_GENKEY],
+			     OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error building gen key command\n");
+		return err;
+
+	}
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int get_active_key_cont(struct opal_dev *dev)
+{
+	const char *activekey;
+	size_t keylen;
+	int error = 0;
+
+	error = parse_and_check_status(dev);
+	if (error)
+		return error;
+	keylen = response_get_string(&dev->parsed, 4, &activekey);
+	if (!activekey) {
+		pr_debug("%s: Couldn't extract the Activekey from the response\n",
+			 __func__);
+		return OPAL_INVAL_PARAM;
+	}
+	dev->prev_data = kmemdup(activekey, keylen, GFP_KERNEL);
+
+	if (!dev->prev_data)
+		return -ENOMEM;
+
+	dev->prev_d_len = keylen;
+
+	return 0;
+}
+
+static int get_active_key(struct opal_dev *dev, void *data)
+{
+	u8 uid[OPAL_UID_LENGTH];
+	int err = 0;
+	u8 *lr = data;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	err = build_locking_range(uid, sizeof(uid), *lr);
+	if (err)
+		return err;
+
+	err = 0;
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_GET], OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 3); /* startCloumn */
+	add_token_u8(&err, dev, 10); /* ActiveKey */
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 4); /* endColumn */
+	add_token_u8(&err, dev, 10); /* ActiveKey */
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	if (err) {
+		pr_debug("Error building get active key command\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, get_active_key_cont);
+}
+
+static int generic_lr_enable_disable(struct opal_dev *dev,
+				     u8 *uid, bool rle, bool wle,
+				     bool rl, bool wl)
+{
+	int err = 0;
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
+
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_VALUES);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 5); /* ReadLockEnabled */
+	add_token_u8(&err, dev, rle);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 6); /* WriteLockEnabled */
+	add_token_u8(&err, dev, wle);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_READLOCKED);
+	add_token_u8(&err, dev, rl);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_WRITELOCKED);
+	add_token_u8(&err, dev, wl);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	return err;
+}
+
+static inline int enable_global_lr(struct opal_dev *dev, u8 *uid,
+				   struct opal_user_lr_setup *setup)
+{
+	int err;
+
+	err = generic_lr_enable_disable(dev, uid, !!setup->RLE, !!setup->WLE,
+					0, 0);
+	if (err)
+		pr_debug("Failed to create enable global lr command\n");
+	return err;
+}
+
+static int setup_locking_range(struct opal_dev *dev, void *data)
+{
+	u8 uid[OPAL_UID_LENGTH];
+	struct opal_user_lr_setup *setup = data;
+	u8 lr;
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	lr = setup->session.opal_key.lr;
+	err = build_locking_range(uid, sizeof(uid), lr);
+	if (err)
+		return err;
+
+	if (lr == 0)
+		err = enable_global_lr(dev, uid, setup);
+	else {
+		add_token_u8(&err, dev, OPAL_CALL);
+		add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
+		add_token_bytestring(&err, dev, opalmethod[OPAL_SET],
+				     OPAL_UID_LENGTH);
+
+		add_token_u8(&err, dev, OPAL_STARTLIST);
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, OPAL_VALUES);
+		add_token_u8(&err, dev, OPAL_STARTLIST);
+
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, 3); /* Ranges Start */
+		add_token_u64(&err, dev, setup->range_start);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, 4); /* Ranges length */
+		add_token_u64(&err, dev, setup->range_length);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, 5); /*ReadLockEnabled */
+		add_token_u64(&err, dev, !!setup->RLE);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, 6); /*WriteLockEnabled*/
+		add_token_u64(&err, dev, !!setup->WLE);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+
+		add_token_u8(&err, dev, OPAL_ENDLIST);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+		add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	}
+	if (err) {
+		pr_debug("Error building Setup Locking range command.\n");
+		return err;
+
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int start_generic_opal_session(struct opal_dev *dev,
+				      enum opal_uid auth,
+				      enum opal_uid sp_type,
+				      const char *key,
+				      u8 key_len)
+{
+	u32 hsn;
+	int err = 0;
+
+	if (key == NULL && auth != OPAL_ANYBODY_UID)
+		return OPAL_INVAL_PARAM;
+
+	clear_opal_cmd(dev);
+
+	set_comid(dev, dev->comid);
+	hsn = GENERIC_HOST_SESSION_NUM;
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_SMUID_UID],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_STARTSESSION],
+			     OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u64(&err, dev, hsn);
+	add_token_bytestring(&err, dev, opaluid[sp_type], OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, 1);
+
+	switch (auth) {
+	case OPAL_ANYBODY_UID:
+		add_token_u8(&err, dev, OPAL_ENDLIST);
+		break;
+	case OPAL_ADMIN1_UID:
+	case OPAL_SID_UID:
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, 0); /* HostChallenge */
+		add_token_bytestring(&err, dev, key, key_len);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, 3); /* HostSignAuth */
+		add_token_bytestring(&err, dev, opaluid[auth],
+				     OPAL_UID_LENGTH);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+		add_token_u8(&err, dev, OPAL_ENDLIST);
+		break;
+	default:
+		pr_debug("Cannot start Admin SP session with auth %d\n", auth);
+		return OPAL_INVAL_PARAM;
+	}
+
+	if (err) {
+		pr_debug("Error building start adminsp session command.\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, start_opal_session_cont);
+}
+
+static int start_anybodyASP_opal_session(struct opal_dev *dev, void *data)
+{
+	return start_generic_opal_session(dev, OPAL_ANYBODY_UID,
+					  OPAL_ADMINSP_UID, NULL, 0);
+}
+
+static int start_SIDASP_opal_session(struct opal_dev *dev, void *data)
+{
+	int ret;
+	const u8 *key = dev->prev_data;
+
+	if (!key) {
+		const struct opal_key *okey = data;
+		ret = start_generic_opal_session(dev, OPAL_SID_UID,
+						 OPAL_ADMINSP_UID,
+						 okey->key,
+						 okey->key_len);
+	} else {
+		ret = start_generic_opal_session(dev, OPAL_SID_UID,
+						 OPAL_ADMINSP_UID,
+						 key, dev->prev_d_len);
+		kfree(key);
+		dev->prev_data = NULL;
+	}
+	return ret;
+}
+
+static int start_admin1LSP_opal_session(struct opal_dev *dev, void *data)
+{
+	struct opal_key *key = data;
+	return start_generic_opal_session(dev, OPAL_ADMIN1_UID,
+					  OPAL_LOCKINGSP_UID,
+					  key->key, key->key_len);
+}
+
+static int start_auth_opal_session(struct opal_dev *dev, void *data)
+{
+	struct opal_session_info *session = data;
+	u8 lk_ul_user[OPAL_UID_LENGTH];
+	size_t keylen = session->opal_key.key_len;
+	int err = 0;
+
+	u8 *key = session->opal_key.key;
+	u32 hsn = GENERIC_HOST_SESSION_NUM;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	if (session->sum) {
+		err = build_locking_user(lk_ul_user, sizeof(lk_ul_user),
+					 session->opal_key.lr);
+		if (err)
+			return err;
+
+	} else if (session->who != OPAL_ADMIN1 && !session->sum) {
+		err = build_locking_user(lk_ul_user, sizeof(lk_ul_user),
+					 session->who - 1);
+		if (err)
+			return err;
+	} else
+		memcpy(lk_ul_user, opaluid[OPAL_ADMIN1_UID], OPAL_UID_LENGTH);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_SMUID_UID],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_STARTSESSION],
+			     OPAL_UID_LENGTH);
+
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u64(&err, dev, hsn);
+	add_token_bytestring(&err, dev, opaluid[OPAL_LOCKINGSP_UID],
+			     OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, 1);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 0);
+	add_token_bytestring(&err, dev, key, keylen);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 3);
+	add_token_bytestring(&err, dev, lk_ul_user, OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error building STARTSESSION command.\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, start_opal_session_cont);
+}
+
+static int revert_tper(struct opal_dev *dev, void *data)
+{
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_ADMINSP_UID],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_REVERT],
+			     OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	if (err) {
+		pr_debug("Error building REVERT TPER command.\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int internal_activate_user(struct opal_dev *dev, void *data)
+{
+	struct opal_session_info *session = data;
+	u8 uid[OPAL_UID_LENGTH];
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	memcpy(uid, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH);
+	uid[7] = session->who;
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_VALUES);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 5); /* Enabled */
+	add_token_u8(&err, dev, OPAL_TRUE);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error building Activate UserN command.\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int erase_locking_range(struct opal_dev *dev, void *data)
+{
+	struct opal_session_info *session = data;
+	u8 uid[OPAL_UID_LENGTH];
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	if (build_locking_range(uid, sizeof(uid), session->opal_key.lr) < 0)
+		return -ERANGE;
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_ERASE],
+			     OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error building Erase Locking Range Command.\n");
+		return err;
+	}
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int set_mbr_done(struct opal_dev *dev, void *data)
+{
+	u8 *mbr_done_tf = data;
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_MBRCONTROL],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_VALUES);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 2); /* Done */
+	add_token_u8(&err, dev, *mbr_done_tf); /* Done T or F */
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error Building set MBR Done command\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int set_mbr_enable_disable(struct opal_dev *dev, void *data)
+{
+	u8 *mbr_en_dis = data;
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_MBRCONTROL],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_VALUES);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 1);
+	add_token_u8(&err, dev, *mbr_en_dis);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error Building set MBR done command\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int generic_pw_cmd(u8 *key, size_t key_len, u8 *cpin_uid,
+			  struct opal_dev *dev)
+{
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, cpin_uid, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_SET],
+			     OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_VALUES);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 3); /* PIN */
+	add_token_bytestring(&err, dev, key, key_len);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	return err;
+}
+
+static int set_new_pw(struct opal_dev *dev, void *data)
+{
+	u8 cpin_uid[OPAL_UID_LENGTH];
+	struct opal_session_info *usr = data;
+
+	memcpy(cpin_uid, opaluid[OPAL_C_PIN_ADMIN1], OPAL_UID_LENGTH);
+
+	if (usr->who != OPAL_ADMIN1) {
+		cpin_uid[5] = 0x03;
+		if (usr->sum)
+			cpin_uid[7] = usr->opal_key.lr + 1;
+		else
+			cpin_uid[7] = usr->who;
+	}
+
+	if (generic_pw_cmd(usr->opal_key.key, usr->opal_key.key_len,
+			   cpin_uid, dev)) {
+		pr_debug("Error building set password command.\n");
+		return -ERANGE;
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int set_sid_cpin_pin(struct opal_dev *dev, void *data)
+{
+	u8 cpin_uid[OPAL_UID_LENGTH];
+	struct opal_key *key = data;
+
+	memcpy(cpin_uid, opaluid[OPAL_C_PIN_SID], OPAL_UID_LENGTH);
+
+	if (generic_pw_cmd(key->key, key->key_len, cpin_uid, dev)) {
+		pr_debug("Error building Set SID cpin\n");
+		return -ERANGE;
+	}
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int add_user_to_lr(struct opal_dev *dev, void *data)
+{
+	u8 lr_buffer[OPAL_UID_LENGTH];
+	u8 user_uid[OPAL_UID_LENGTH];
+	struct opal_lock_unlock *lkul = data;
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	memcpy(lr_buffer, opaluid[OPAL_LOCKINGRANGE_ACE_RDLOCKED],
+	       OPAL_UID_LENGTH);
+
+	if (lkul->l_state == OPAL_RW)
+		memcpy(lr_buffer, opaluid[OPAL_LOCKINGRANGE_ACE_WRLOCKED],
+		       OPAL_UID_LENGTH);
+
+	lr_buffer[7] = lkul->session.opal_key.lr;
+
+	memcpy(user_uid, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH);
+
+	user_uid[7] = lkul->session.who;
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, lr_buffer, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_SET],
+			     OPAL_UID_LENGTH);
+
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_VALUES);
+
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 3);
+
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_bytestring(&err, dev,
+			     opaluid[OPAL_HALF_UID_AUTHORITY_OBJ_REF],
+			     OPAL_UID_LENGTH/2);
+	add_token_bytestring(&err, dev, user_uid, OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_bytestring(&err, dev,
+			     opaluid[OPAL_HALF_UID_AUTHORITY_OBJ_REF],
+			     OPAL_UID_LENGTH/2);
+	add_token_bytestring(&err, dev, user_uid, OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_bytestring(&err, dev, opaluid[OPAL_HALF_UID_BOOLEAN_ACE],
+			     OPAL_UID_LENGTH/2);
+	add_token_u8(&err, dev, 1);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error building add user to locking range command.\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int lock_unlock_locking_range(struct opal_dev *dev, void *data)
+{
+	u8 lr_buffer[OPAL_UID_LENGTH];
+	struct opal_lock_unlock *lkul = data;
+	u8 read_locked = 1, write_locked = 1;
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	if (build_locking_range(lr_buffer, sizeof(lr_buffer),
+				lkul->session.opal_key.lr) < 0)
+		return -ERANGE;
+
+	switch (lkul->l_state) {
+	case OPAL_RO:
+		read_locked = 0;
+		write_locked = 1;
+		break;
+	case OPAL_RW:
+		read_locked = 0;
+		write_locked = 0;
+		break;
+	case OPAL_LK:
+		/* vars are initalized to locked */
+		break;
+	default:
+		pr_debug("Tried to set an invalid locking state... returning to uland\n");
+		return OPAL_INVAL_PARAM;
+	}
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, lr_buffer, OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_SET], OPAL_UID_LENGTH);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_VALUES);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_READLOCKED);
+	add_token_u8(&err, dev, read_locked);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, OPAL_WRITELOCKED);
+	add_token_u8(&err, dev, write_locked);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error building SET command.\n");
+		return err;
+	}
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+
+static int lock_unlock_locking_range_sum(struct opal_dev *dev, void *data)
+{
+	u8 lr_buffer[OPAL_UID_LENGTH];
+	u8 read_locked = 1, write_locked = 1;
+	struct opal_lock_unlock *lkul = data;
+	int ret;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	if (build_locking_range(lr_buffer, sizeof(lr_buffer),
+				lkul->session.opal_key.lr) < 0)
+		return -ERANGE;
+
+	switch (lkul->l_state) {
+	case OPAL_RO:
+		read_locked = 0;
+		write_locked = 1;
+		break;
+	case OPAL_RW:
+		read_locked = 0;
+		write_locked = 0;
+		break;
+	case OPAL_LK:
+		/* vars are initalized to locked */
+		break;
+	default:
+		pr_debug("Tried to set an invalid locking state.\n");
+		return OPAL_INVAL_PARAM;
+	}
+	ret = generic_lr_enable_disable(dev, lr_buffer, 1, 1,
+					read_locked, write_locked);
+
+	if (ret < 0) {
+		pr_debug("Error building SET command.\n");
+		return ret;
+	}
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int activate_lsp(struct opal_dev *dev, void *data)
+{
+	struct opal_lr_act *opal_act = data;
+	u8 user_lr[OPAL_UID_LENGTH];
+	u8 uint_3 = 0x83;
+	int err = 0, i;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_LOCKINGSP_UID],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_ACTIVATE],
+			     OPAL_UID_LENGTH);
+
+
+	if (opal_act->sum) {
+		err = build_locking_range(user_lr, sizeof(user_lr),
+					  opal_act->lr[0]);
+		if (err)
+			return err;
+
+		add_token_u8(&err, dev, OPAL_STARTLIST);
+		add_token_u8(&err, dev, OPAL_STARTNAME);
+		add_token_u8(&err, dev, uint_3);
+		add_token_u8(&err, dev, 6);
+		add_token_u8(&err, dev, 0);
+		add_token_u8(&err, dev, 0);
+
+		add_token_u8(&err, dev, OPAL_STARTLIST);
+		add_token_bytestring(&err, dev, user_lr, OPAL_UID_LENGTH);
+		for (i = 1; i < opal_act->num_lrs; i++) {
+			user_lr[7] = opal_act->lr[i];
+			add_token_bytestring(&err, dev, user_lr, OPAL_UID_LENGTH);
+		}
+		add_token_u8(&err, dev, OPAL_ENDLIST);
+		add_token_u8(&err, dev, OPAL_ENDNAME);
+		add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	} else {
+		add_token_u8(&err, dev, OPAL_STARTLIST);
+		add_token_u8(&err, dev, OPAL_ENDLIST);
+	}
+
+	if (err) {
+		pr_debug("Error building Activate LockingSP command.\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, parse_and_check_status);
+}
+
+static int get_lsp_lifecycle_cont(struct opal_dev *dev)
+{
+	u8 lc_status;
+	int error = 0;
+
+	error = parse_and_check_status(dev);
+	if (error)
+		return error;
+
+	lc_status = response_get_u64(&dev->parsed, 4);
+	/* 0x08 is Manufacured Inactive */
+	/* 0x09 is Manufactured */
+	if (lc_status != OPAL_MANUFACTURED_INACTIVE) {
+		pr_debug("Couldn't determine the status of the Lifecycle state\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/* Determine if we're in the Manufactured Inactive or Active state */
+static int get_lsp_lifecycle(struct opal_dev *dev, void *data)
+{
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_LOCKINGSP_UID],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_GET], OPAL_UID_LENGTH);
+
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 3); /* Start Column */
+	add_token_u8(&err, dev, 6); /* Lifecycle Column */
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 4); /* End Column */
+	add_token_u8(&err, dev, 6); /* Lifecycle Column */
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error Building GET Lifecycle Status command\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, get_lsp_lifecycle_cont);
+}
+
+static int get_msid_cpin_pin_cont(struct opal_dev *dev)
+{
+	const char *msid_pin;
+	size_t strlen;
+	int error = 0;
+
+	error = parse_and_check_status(dev);
+	if (error)
+		return error;
+
+	strlen = response_get_string(&dev->parsed, 4, &msid_pin);
+	if (!msid_pin) {
+		pr_debug("%s: Couldn't extract PIN from response\n", __func__);
+		return OPAL_INVAL_PARAM;
+	}
+
+	dev->prev_data = kmemdup(msid_pin, strlen, GFP_KERNEL);
+	if (!dev->prev_data)
+		return -ENOMEM;
+
+	dev->prev_d_len = strlen;
+
+	return 0;
+}
+
+static int get_msid_cpin_pin(struct opal_dev *dev, void *data)
+{
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+
+	add_token_u8(&err, dev, OPAL_CALL);
+	add_token_bytestring(&err, dev, opaluid[OPAL_C_PIN_MSID],
+			     OPAL_UID_LENGTH);
+	add_token_bytestring(&err, dev, opalmethod[OPAL_GET], OPAL_UID_LENGTH);
+
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+	add_token_u8(&err, dev, OPAL_STARTLIST);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 3); /* Start Column */
+	add_token_u8(&err, dev, 3); /* PIN */
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_STARTNAME);
+	add_token_u8(&err, dev, 4); /* End Column */
+	add_token_u8(&err, dev, 3); /* Lifecycle Column */
+	add_token_u8(&err, dev, OPAL_ENDNAME);
+
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+	add_token_u8(&err, dev, OPAL_ENDLIST);
+
+	if (err) {
+		pr_debug("Error building Get MSID CPIN PIN command.\n");
+		return err;
+	}
+
+	return finalize_and_send(dev, get_msid_cpin_pin_cont);
+}
+
+static int end_opal_session(struct opal_dev *dev, void *data)
+{
+	int err = 0;
+
+	clear_opal_cmd(dev);
+	set_comid(dev, dev->comid);
+	add_token_u8(&err, dev, OPAL_ENDOFSESSION);
+
+	if (err < 0)
+		return err;
+	return finalize_and_send(dev, end_session_cont);
+}
+
+static int end_opal_session_error(struct opal_dev *dev)
+{
+	const struct opal_step error_end_session[] = {
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	dev->steps = error_end_session;
+	return next(dev);
+}
+
+static inline void setup_opal_dev(struct opal_dev *dev,
+				  const struct opal_step *steps)
+{
+	dev->steps = steps;
+	dev->tsn = 0;
+	dev->hsn = 0;
+	dev->prev_data = NULL;
+}
+
+static int check_opal_support(struct opal_dev *dev)
+{
+	const struct opal_step steps[] = {
+		{ opal_discovery0, },
+		{ NULL, }
+	};
+	int ret;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, steps);
+	ret = next(dev);
+	dev->supported = !ret;
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static void clean_opal_dev(struct opal_dev *dev)
+{
+
+	struct opal_suspend_data *suspend, *next;
+
+	mutex_lock(&dev->dev_lock);
+	list_for_each_entry_safe(suspend, next, &dev->unlk_lst, node) {
+		list_del(&suspend->node);
+		kfree(suspend);
+	}
+	mutex_unlock(&dev->dev_lock);
+}
+
+void free_opal_dev(struct opal_dev *dev)
+{
+	if (!dev)
+		return;
+	clean_opal_dev(dev);
+	kfree(dev);
+}
+EXPORT_SYMBOL(free_opal_dev);
+
+struct opal_dev *init_opal_dev(void *data, sec_send_recv *send_recv)
+{
+	struct opal_dev *dev;
+
+	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return NULL;
+
+	INIT_LIST_HEAD(&dev->unlk_lst);
+	mutex_init(&dev->dev_lock);
+	dev->data = data;
+	dev->send_recv = send_recv;
+	if (check_opal_support(dev) != 0) {
+		pr_debug("Opal is not supported on this device\n");
+		kfree(dev);
+		return NULL;
+	}
+	return dev;
+}
+EXPORT_SYMBOL(init_opal_dev);
+
+static int opal_secure_erase_locking_range(struct opal_dev *dev,
+					   struct opal_session_info *opal_session)
+{
+	const struct opal_step erase_steps[] = {
+		{ opal_discovery0, },
+		{ start_auth_opal_session, opal_session },
+		{ get_active_key, &opal_session->opal_key.lr },
+		{ gen_key, },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, erase_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_erase_locking_range(struct opal_dev *dev,
+				    struct opal_session_info *opal_session)
+{
+	const struct opal_step erase_steps[] = {
+		{ opal_discovery0, },
+		{ start_auth_opal_session, opal_session },
+		{ erase_locking_range, opal_session },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, erase_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_enable_disable_shadow_mbr(struct opal_dev *dev,
+					  struct opal_mbr_data *opal_mbr)
+{
+	u8 enable_disable = opal_mbr->enable_disable == OPAL_MBR_ENABLE ?
+		OPAL_TRUE : OPAL_FALSE;
+
+	const struct opal_step mbr_steps[] = {
+		{ opal_discovery0, },
+		{ start_admin1LSP_opal_session, &opal_mbr->key },
+		{ set_mbr_done, &enable_disable },
+		{ end_opal_session, },
+		{ start_admin1LSP_opal_session, &opal_mbr->key },
+		{ set_mbr_enable_disable, &enable_disable },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	if (opal_mbr->enable_disable != OPAL_MBR_ENABLE &&
+	    opal_mbr->enable_disable != OPAL_MBR_DISABLE)
+		return -EINVAL;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, mbr_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_save(struct opal_dev *dev, struct opal_lock_unlock *lk_unlk)
+{
+	struct opal_suspend_data *suspend;
+
+	suspend = kzalloc(sizeof(*suspend), GFP_KERNEL);
+	if (!suspend)
+		return -ENOMEM;
+
+	suspend->unlk = *lk_unlk;
+	suspend->lr = lk_unlk->session.opal_key.lr;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, NULL);
+	add_suspend_info(dev, suspend);
+	mutex_unlock(&dev->dev_lock);
+	return 0;
+}
+
+static int opal_add_user_to_lr(struct opal_dev *dev,
+			       struct opal_lock_unlock *lk_unlk)
+{
+	const struct opal_step steps[] = {
+		{ opal_discovery0, },
+		{ start_admin1LSP_opal_session, &lk_unlk->session.opal_key },
+		{ add_user_to_lr, lk_unlk },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	if (lk_unlk->l_state != OPAL_RO &&
+	    lk_unlk->l_state != OPAL_RW) {
+		pr_debug("Locking state was not RO or RW\n");
+		return -EINVAL;
+	}
+	if (lk_unlk->session.who < OPAL_USER1 ||
+	    lk_unlk->session.who > OPAL_USER9) {
+		pr_debug("Authority was not within the range of users: %d\n",
+			 lk_unlk->session.who);
+		return -EINVAL;
+	}
+	if (lk_unlk->session.sum) {
+		pr_debug("%s not supported in sum. Use setup locking range\n",
+			 __func__);
+		return -EINVAL;
+	}
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_reverttper(struct opal_dev *dev, struct opal_key *opal)
+{
+	const struct opal_step revert_steps[] = {
+		{ opal_discovery0, },
+		{ start_SIDASP_opal_session, opal },
+		{ revert_tper, }, /* controller will terminate session */
+		{ NULL, }
+	};
+	int ret;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, revert_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+
+	/*
+	 * If we successfully reverted lets clean
+	 * any saved locking ranges.
+	 */
+	if (!ret)
+		clean_opal_dev(dev);
+
+	return ret;
+}
+
+static int __opal_lock_unlock(struct opal_dev *dev,
+			      struct opal_lock_unlock *lk_unlk)
+{
+	const struct opal_step unlock_steps[] = {
+		{ opal_discovery0, },
+		{ start_auth_opal_session, &lk_unlk->session },
+		{ lock_unlock_locking_range, lk_unlk },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	const struct opal_step unlock_sum_steps[] = {
+		{ opal_discovery0, },
+		{ start_auth_opal_session, &lk_unlk->session },
+		{ lock_unlock_locking_range_sum, lk_unlk },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+
+	dev->steps = lk_unlk->session.sum ? unlock_sum_steps : unlock_steps;
+	return next(dev);
+}
+
+static int __opal_set_mbr_done(struct opal_dev *dev, struct opal_key *key)
+{
+	u8 mbr_done_tf = OPAL_TRUE;
+	const struct opal_step mbrdone_step [] = {
+		{ opal_discovery0, },
+		{ start_admin1LSP_opal_session, key },
+		{ set_mbr_done, &mbr_done_tf },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+
+	dev->steps = mbrdone_step;
+	return next(dev);
+}
+
+static int opal_lock_unlock(struct opal_dev *dev,
+			    struct opal_lock_unlock *lk_unlk)
+{
+	int ret;
+
+	if (lk_unlk->session.who < OPAL_ADMIN1 ||
+	    lk_unlk->session.who > OPAL_USER9)
+		return -EINVAL;
+
+	mutex_lock(&dev->dev_lock);
+	ret = __opal_lock_unlock(dev, lk_unlk);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_take_ownership(struct opal_dev *dev, struct opal_key *opal)
+{
+	const struct opal_step owner_steps[] = {
+		{ opal_discovery0, },
+		{ start_anybodyASP_opal_session, },
+		{ get_msid_cpin_pin, },
+		{ end_opal_session, },
+		{ start_SIDASP_opal_session, opal },
+		{ set_sid_cpin_pin, opal },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, owner_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_activate_lsp(struct opal_dev *dev, struct opal_lr_act *opal_lr_act)
+{
+	const struct opal_step active_steps[] = {
+		{ opal_discovery0, },
+		{ start_SIDASP_opal_session, &opal_lr_act->key },
+		{ get_lsp_lifecycle, },
+		{ activate_lsp, opal_lr_act },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	if (!opal_lr_act->num_lrs || opal_lr_act->num_lrs > OPAL_MAX_LRS)
+		return -EINVAL;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, active_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_setup_locking_range(struct opal_dev *dev,
+				    struct opal_user_lr_setup *opal_lrs)
+{
+	const struct opal_step lr_steps[] = {
+		{ opal_discovery0, },
+		{ start_auth_opal_session, &opal_lrs->session },
+		{ setup_locking_range, opal_lrs },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, lr_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
+{
+	const struct opal_step pw_steps[] = {
+		{ opal_discovery0, },
+		{ start_auth_opal_session, &opal_pw->session },
+		{ set_new_pw, &opal_pw->new_user_pw },
+		{ end_opal_session, },
+		{ NULL }
+	};
+	int ret;
+
+	if (opal_pw->session.who < OPAL_ADMIN1 ||
+	    opal_pw->session.who > OPAL_USER9  ||
+	    opal_pw->new_user_pw.who < OPAL_ADMIN1 ||
+	    opal_pw->new_user_pw.who > OPAL_USER9)
+		return -EINVAL;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, pw_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+static int opal_activate_user(struct opal_dev *dev,
+			      struct opal_session_info *opal_session)
+{
+	const struct opal_step act_steps[] = {
+		{ opal_discovery0, },
+		{ start_admin1LSP_opal_session, &opal_session->opal_key },
+		{ internal_activate_user, opal_session },
+		{ end_opal_session, },
+		{ NULL, }
+	};
+	int ret;
+
+	/* We can't activate Admin1 it's active as manufactured */
+	if (opal_session->who < OPAL_USER1 ||
+	    opal_session->who > OPAL_USER9) {
+		pr_debug("Who was not a valid user: %d\n", opal_session->who);
+		return -EINVAL;
+	}
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, act_steps);
+	ret = next(dev);
+	mutex_unlock(&dev->dev_lock);
+	return ret;
+}
+
+bool opal_unlock_from_suspend(struct opal_dev *dev)
+{
+	struct opal_suspend_data *suspend;
+	bool was_failure = false;
+	int ret = 0;
+
+	if (!dev)
+		return false;
+	if (!dev->supported)
+		return false;
+
+	mutex_lock(&dev->dev_lock);
+	setup_opal_dev(dev, NULL);
+
+	list_for_each_entry(suspend, &dev->unlk_lst, node) {
+		dev->tsn = 0;
+		dev->hsn = 0;
+
+		ret = __opal_lock_unlock(dev, &suspend->unlk);
+		if (ret) {
+			pr_debug("Failed to unlock LR %hhu with sum %d\n",
+				 suspend->unlk.session.opal_key.lr,
+				 suspend->unlk.session.sum);
+			was_failure = true;
+		}
+		if (dev->mbr_enabled) {
+			ret = __opal_set_mbr_done(dev, &suspend->unlk.session.opal_key);
+			if (ret)
+				pr_debug("Failed to set MBR Done in S3 resume\n");
+		}
+	}
+	mutex_unlock(&dev->dev_lock);
+	return was_failure;
+}
+EXPORT_SYMBOL(opal_unlock_from_suspend);
+
+int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
+{
+	void *p;
+	int ret = -ENOTTY;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+	if (!dev)
+		return -ENOTSUPP;
+	if (!dev->supported)
+		return -ENOTSUPP;
+
+	p = memdup_user(arg, _IOC_SIZE(cmd));
+	if (IS_ERR(p))
+		return PTR_ERR(p);
+
+	switch (cmd) {
+	case IOC_OPAL_SAVE:
+		ret = opal_save(dev, p);
+		break;
+	case IOC_OPAL_LOCK_UNLOCK:
+		ret = opal_lock_unlock(dev, p);
+		break;
+	case IOC_OPAL_TAKE_OWNERSHIP:
+		ret = opal_take_ownership(dev, p);
+		break;
+	case IOC_OPAL_ACTIVATE_LSP:
+		ret = opal_activate_lsp(dev, p);
+		break;
+	case IOC_OPAL_SET_PW:
+		ret = opal_set_new_pw(dev, p);
+		break;
+	case IOC_OPAL_ACTIVATE_USR:
+		ret = opal_activate_user(dev, p);
+		break;
+	case IOC_OPAL_REVERT_TPR:
+		ret = opal_reverttper(dev, p);
+		break;
+	case IOC_OPAL_LR_SETUP:
+		ret = opal_setup_locking_range(dev, p);
+		break;
+	case IOC_OPAL_ADD_USR_TO_LR:
+		ret = opal_add_user_to_lr(dev, p);
+		break;
+	case IOC_OPAL_ENABLE_DISABLE_MBR:
+		ret = opal_enable_disable_shadow_mbr(dev, p);
+		break;
+	case IOC_OPAL_ERASE_LR:
+		ret = opal_erase_locking_range(dev, p);
+		break;
+	case IOC_OPAL_SECURE_ERASE_LR:
+		ret = opal_secure_erase_locking_range(dev, p);
+		break;
+	default:
+		break;
+	}
+
+	kfree(p);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(sed_ioctl);