sed-opal.c 58.8 KB
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/*
 * 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"

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#define IO_BUFFER_LENGTH 2048
#define MAX_TOKS 64

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struct opal_step {
	int (*fn)(struct opal_dev *dev, void *data);
	void *data;
};
typedef int (cont_fn)(struct opal_dev *dev);
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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;
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	bool mbr_enabled;
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	void *data;
	sec_send_recv *send_recv;

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	const struct opal_step *steps;
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	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;
};


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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)) {
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		pr_debug("TPer sync not supported. flags = %d\n",
			 tper->supported_features);
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		return false;
	}

	return true;
}

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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);
}

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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) {
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		pr_debug("Need at least one locking object.\n");
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		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)
{
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	return dev->send_recv(dev->data, dev->comid, TCG_SECP_01,
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			      dev->cmd, IO_BUFFER_LENGTH,
			      true);
}

static int opal_recv_cmd(struct opal_dev *dev)
{
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	return dev->send_recv(dev->data, dev->comid, TCG_SECP_01,
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			      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)
{
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	const struct opal_step *step;
	int state = 0, error = 0;
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	do {
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		step = &dev->steps[state];
		if (!step->fn)
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			break;

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		error = step->fn(dev, step->data);
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		if (error) {
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			pr_debug("Error on step function: %d with error %d: %s\n",
				 state, error,
				 opal_error_to_human(error));
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			/* 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.
			 */
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			if (state > 1) {
				end_opal_session_error(dev);
				return error;
			}

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		}
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		state++;
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	} 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;
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	u32 hlen = be32_to_cpu(hdr->length);
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	print_buffer(dev->resp, hlen);
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	dev->mbr_enabled = false;
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	if (hlen > IO_BUFFER_LENGTH - sizeof(*hdr)) {
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		pr_debug("Discovery length overflows buffer (%zu+%u)/%u\n",
			 sizeof(*hdr), hlen, IO_BUFFER_LENGTH);
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		return -EFAULT;
	}

	epos += hlen; /* end of buffer */
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	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:
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			dev->mbr_enabled = check_mbrenabled(body->features);
			break;
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		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) {
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		pr_debug("This device is not Opal enabled. Not Supported!\n");
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		return -EOPNOTSUPP;
	}

	if (!single_user)
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		pr_debug("Device doesn't support single user mode\n");
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	if (!found_com_id) {
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		pr_debug("Could not find OPAL comid for device. Returning early\n");
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		return -EOPNOTSUPP;
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	}

	dev->comid = comid;

	return 0;
}

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static int opal_discovery0(struct opal_dev *dev, void *data)
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{
	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) {
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		pr_debug("Error adding u8: end of buffer.\n");
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		*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;
	}

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	msb = fls64(number);
	len = DIV_ROUND_UP(msb, 8);
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	if (cmd->pos >= IO_BUFFER_LENGTH - len - 1) {
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		pr_debug("Error adding u64: end of buffer.\n");
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		*err = -ERANGE;
		return;
	}
	add_short_atom_header(cmd, false, false, len);
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	while (len--)
		add_token_u8(err, cmd, number >> (len * 8));
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}

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) {
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		pr_debug("Error adding bytestring: end of buffer.\n");
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		*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) {
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		pr_debug("Can't build locking range. Length OOB\n");
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		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) {
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		pr_debug("Can't build locking range user, Length OOB\n");
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		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) {
660
		pr_debug("Error finalizing command.\n");
661 662 663 664 665 666 667 668 669 670 671
		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) {
672
			pr_debug("Error: Buffer overrun\n");
673 674 675 676 677 678 679 680 681 682 683
			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;
}

684 685 686
static const struct opal_resp_tok *response_get_token(
				const struct parsed_resp *resp,
				int n)
687 688 689 690
{
	const struct opal_resp_tok *tok;

	if (n >= resp->num) {
691 692
		pr_debug("Token number doesn't exist: %d, resp: %d\n",
			 n, resp->num);
693
		return ERR_PTR(-EINVAL);
694 695 696 697
	}

	tok = &resp->toks[n];
	if (tok->len == 0) {
698
		pr_debug("Token length must be non-zero\n");
699
		return ERR_PTR(-EINVAL);
700 701
	}

702
	return tok;
703 704
}

705 706
static ssize_t response_parse_tiny(struct opal_resp_tok *tok,
				   const u8 *pos)
707 708 709 710 711 712 713 714 715 716 717 718 719 720 721
{
	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;
}

722 723
static ssize_t response_parse_short(struct opal_resp_tok *tok,
				    const u8 *pos)
724 725 726 727 728 729 730 731 732 733 734
{
	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;
735
		ssize_t i, b = 0;
736 737 738

		tok->type = OPAL_DTA_TOKENID_UINT;
		if (tok->len > 9) {
739
			pr_debug("uint64 with more than 8 bytes\n");
740 741 742 743 744 745 746 747 748 749 750 751
			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;
}

752 753
static ssize_t response_parse_medium(struct opal_resp_tok *tok,
				     const u8 *pos)
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768
{
	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;
}

769 770
static ssize_t response_parse_long(struct opal_resp_tok *tok,
				   const u8 *pos)
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
{
	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;
}

786 787
static ssize_t response_parse_token(struct opal_resp_tok *tok,
				    const u8 *pos)
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803
{
	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;
804
	ssize_t token_length;
805
	const u8 *pos;
806
	u32 clen, plen, slen;
807 808 809 810 811 812 813 814 815 816 817

	if (!buf)
		return -EFAULT;

	if (!resp)
		return -EFAULT;

	hdr = (struct opal_header *)buf;
	pos = buf;
	pos += sizeof(*hdr);

818 819 820 821 822 823 824 825
	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)) {
826 827
		pr_debug("Bad header length. cp: %u, pkt: %u, subpkt: %u\n",
			 clen, plen, slen);
828 829 830 831 832 833 834 835
		print_buffer(pos, sizeof(*hdr));
		return -EINVAL;
	}

	if (pos > buf + length)
		return -EFAULT;

	iter = resp->toks;
836
	total = slen;
837 838 839 840 841 842 843 844 845 846 847 848 849
	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);

850 851
		if (token_length < 0)
			return token_length;
852 853 854 855 856 857 858 859

		pos += token_length;
		total -= token_length;
		iter++;
		num_entries++;
	}

	if (num_entries == 0) {
860
		pr_debug("Couldn't parse response.\n");
861 862 863 864 865 866 867 868 869 870
		return -EINVAL;
	}
	resp->num = num_entries;

	return 0;
}

static size_t response_get_string(const struct parsed_resp *resp, int n,
				  const char **store)
{
871 872 873
	u8 skip;
	const struct opal_resp_tok *token;

874 875
	*store = NULL;
	if (!resp) {
876
		pr_debug("Response is NULL\n");
877 878 879
		return 0;
	}

880
	if (n >= resp->num) {
881 882
		pr_debug("Response has %d tokens. Can't access %d\n",
			 resp->num, n);
883 884 885
		return 0;
	}

886 887
	token = &resp->toks[n];
	if (token->type != OPAL_DTA_TOKENID_BYTESTRING) {
888
		pr_debug("Token is not a byte string!\n");
889 890 891
		return 0;
	}

892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
	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;
910 911 912 913 914
}

static u64 response_get_u64(const struct parsed_resp *resp, int n)
{
	if (!resp) {
915
		pr_debug("Response is NULL\n");
916 917 918
		return 0;
	}

919
	if (n >= resp->num) {
920 921
		pr_debug("Response has %d tokens. Can't access %d\n",
			 resp->num, n);
922 923 924 925
		return 0;
	}

	if (resp->toks[n].type != OPAL_DTA_TOKENID_UINT) {
926 927
		pr_debug("Token is not unsigned it: %d\n",
			 resp->toks[n].type);
928 929 930 931 932
		return 0;
	}

	if (!(resp->toks[n].width == OPAL_WIDTH_TINY ||
	      resp->toks[n].width == OPAL_WIDTH_SHORT)) {
933 934
		pr_debug("Atom is not short or tiny: %d\n",
			 resp->toks[n].width);
935 936 937 938 939 940
		return 0;
	}

	return resp->toks[n].stored.u;
}

941 942 943 944 945 946 947 948 949
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;
}

950 951
static u8 response_status(const struct parsed_resp *resp)
{
952 953 954 955
	const struct opal_resp_tok *tok;

	tok = response_get_token(resp, 0);
	if (response_token_matches(tok, OPAL_ENDOFSESSION))
956 957 958 959 960
		return 0;

	if (resp->num < 5)
		return DTAERROR_NO_METHOD_STATUS;

961 962 963 964 965 966
	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))
967 968 969 970 971 972 973 974 975 976 977 978 979 980
		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) {
981
		pr_debug("Couldn't parse response.\n");
982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
		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) {
1007
		pr_debug("Couldn't authenticate session\n");
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
		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) {
1044
		pr_debug("Error finalizing command buffer: %d\n", ret);
1045 1046 1047 1048 1049 1050 1051 1052
		return ret;
	}

	print_buffer(dev->cmd, dev->pos);

	return opal_send_recv(dev, cont);
}

1053
static int gen_key(struct opal_dev *dev, void *data)
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
{
	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) {
1073
		pr_debug("Error building gen key command\n");
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
		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) {
1091 1092
		pr_debug("%s: Couldn't extract the Activekey from the response\n",
			 __func__);
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
		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;
}

1105
static int get_active_key(struct opal_dev *dev, void *data)
1106 1107 1108
{
	u8 uid[OPAL_UID_LENGTH];
	int err = 0;
1109
	u8 *lr = data;
1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134

	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) {
1135
		pr_debug("Error building get active key command\n");
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190
		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)
1191
		pr_debug("Failed to create enable global lr command\n");
1192 1193 1194
	return err;
}

1195
static int setup_locking_range(struct opal_dev *dev, void *data)
1196 1197
{
	u8 uid[OPAL_UID_LENGTH];
1198
	struct opal_user_lr_setup *setup = data;
1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
	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) {
1249
		pr_debug("Error building Setup Locking range command.\n");
1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265
		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;

1266
	if (key == NULL && auth != OPAL_ANYBODY_UID)
1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301
		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:
1302
		pr_debug("Cannot start Admin SP session with auth %d\n", auth);
1303 1304 1305 1306
		return OPAL_INVAL_PARAM;
	}

	if (err) {
1307
		pr_debug("Error building start adminsp session command.\n");
1308 1309 1310 1311 1312 1313
		return err;
	}

	return finalize_and_send(dev, start_opal_session_cont);
}

1314
static int start_anybodyASP_opal_session(struct opal_dev *dev, void *data)
1315 1316 1317 1318 1319
{
	return start_generic_opal_session(dev, OPAL_ANYBODY_UID,
					  OPAL_ADMINSP_UID, NULL, 0);
}

1320
static int start_SIDASP_opal_session(struct opal_dev *dev, void *data)
1321 1322 1323 1324 1325
{
	int ret;
	const u8 *key = dev->prev_data;

	if (!key) {
1326
		const struct opal_key *okey = data;
1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
		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;
}

1341
static int start_admin1LSP_opal_session(struct opal_dev *dev, void *data)
1342
{
1343
	struct opal_key *key = data;
1344 1345 1346 1347 1348
	return start_generic_opal_session(dev, OPAL_ADMIN1_UID,
					  OPAL_LOCKINGSP_UID,
					  key->key, key->key_len);
}

1349
static int start_auth_opal_session(struct opal_dev *dev, void *data)
1350
{
1351
	struct opal_session_info *session = data;
1352
	u8 lk_ul_user[OPAL_UID_LENGTH];
1353
	size_t keylen = session->opal_key.key_len;
1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397
	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) {
1398
		pr_debug("Error building STARTSESSION command.\n");
1399 1400 1401 1402 1403 1404
		return err;
	}

	return finalize_and_send(dev, start_opal_session_cont);
}

1405
static int revert_tper(struct opal_dev *dev, void *data)
1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
{
	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) {
1420
		pr_debug("Error building REVERT TPER command.\n");
1421 1422 1423 1424 1425 1426
		return err;
	}

	return finalize_and_send(dev, parse_and_check_status);
}

1427
static int internal_activate_user(struct opal_dev *dev, void *data)
1428
{
1429
	struct opal_session_info *session = data;
1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454
	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) {
1455
		pr_debug("Error building Activate UserN command.\n");
1456 1457 1458 1459 1460 1461
		return err;
	}

	return finalize_and_send(dev, parse_and_check_status);
}

1462
static int erase_locking_range(struct opal_dev *dev, void *data)
1463
{
1464
	struct opal_session_info *session = data;
1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
	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) {
1482
		pr_debug("Error building Erase Locking Range Command.\n");
1483 1484 1485 1486 1487
		return err;
	}
	return finalize_and_send(dev, parse_and_check_status);
}

1488
static int set_mbr_done(struct opal_dev *dev, void *data)
1489
{
1490
	u8 *mbr_done_tf = data;
1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505
	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 */
1506
	add_token_u8(&err, dev, *mbr_done_tf); /* Done T or F */
1507 1508 1509 1510 1511 1512
	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) {
1513
		pr_debug("Error Building set MBR Done command\n");
1514 1515 1516 1517 1518 1519
		return err;
	}

	return finalize_and_send(dev, parse_and_check_status);
}

1520
static int set_mbr_enable_disable(struct opal_dev *dev, void *data)
1521
{
1522
	u8 *mbr_en_dis = data;
1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537
	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);
1538
	add_token_u8(&err, dev, *mbr_en_dis);
1539 1540 1541 1542 1543 1544
	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) {
1545
		pr_debug("Error Building set MBR done command\n");
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578
		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;
}

1579
static int set_new_pw(struct opal_dev *dev, void *data)
1580 1581
{
	u8 cpin_uid[OPAL_UID_LENGTH];
1582
	struct opal_session_info *usr = data;
1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595

	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)) {
1596
		pr_debug("Error building set password command.\n");
1597 1598 1599 1600 1601 1602
		return -ERANGE;
	}

	return finalize_and_send(dev, parse_and_check_status);
}

1603
static int set_sid_cpin_pin(struct opal_dev *dev, void *data)
1604 1605
{
	u8 cpin_uid[OPAL_UID_LENGTH];
1606
	struct opal_key *key = data;
1607 1608 1609 1610

	memcpy(cpin_uid, opaluid[OPAL_C_PIN_SID], OPAL_UID_LENGTH);

	if (generic_pw_cmd(key->key, key->key_len, cpin_uid, dev)) {
1611
		pr_debug("Error building Set SID cpin\n");
1612 1613 1614 1615 1616
		return -ERANGE;
	}
	return finalize_and_send(dev, parse_and_check_status);
}

1617
static int add_user_to_lr(struct opal_dev *dev, void *data)
1618 1619 1620
{
	u8 lr_buffer[OPAL_UID_LENGTH];
	u8 user_uid[OPAL_UID_LENGTH];
1621
	struct opal_lock_unlock *lkul = data;
1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
	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) {
1686
		pr_debug("Error building add user to locking range command.\n");
1687 1688 1689 1690 1691 1692
		return err;
	}

	return finalize_and_send(dev, parse_and_check_status);
}

1693
static int lock_unlock_locking_range(struct opal_dev *dev, void *data)
1694 1695
{
	u8 lr_buffer[OPAL_UID_LENGTH];
1696
	struct opal_lock_unlock *lkul = data;
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719
	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:
1720
		pr_debug("Tried to set an invalid locking state... returning to uland\n");
1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
		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) {
1747
		pr_debug("Error building SET command.\n");
1748 1749 1750 1751 1752 1753
		return err;
	}
	return finalize_and_send(dev, parse_and_check_status);
}


1754
static int lock_unlock_locking_range_sum(struct opal_dev *dev, void *data)
1755 1756 1757
{
	u8 lr_buffer[OPAL_UID_LENGTH];
	u8 read_locked = 1, write_locked = 1;
1758
	struct opal_lock_unlock *lkul = data;
1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780
	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:
1781
		pr_debug("Tried to set an invalid locking state.\n");
1782 1783 1784 1785 1786 1787
		return OPAL_INVAL_PARAM;
	}
	ret = generic_lr_enable_disable(dev, lr_buffer, 1, 1,
					read_locked, write_locked);

	if (ret < 0) {
1788
		pr_debug("Error building SET command.\n");
1789 1790 1791 1792 1793
		return ret;
	}
	return finalize_and_send(dev, parse_and_check_status);
}

1794
static int activate_lsp(struct opal_dev *dev, void *data)
1795
{
1796
	struct opal_lr_act *opal_act = data;
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839
	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) {
1840
		pr_debug("Error building Activate LockingSP command.\n");
1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
		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) {
1860
		pr_debug("Couldn't determine the status of the Lifecycle state\n");
1861 1862 1863 1864 1865 1866 1867
		return -ENODEV;
	}

	return 0;
}

/* Determine if we're in the Manufactured Inactive or Active state */
1868
static int get_lsp_lifecycle(struct opal_dev *dev, void *data)
1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896
{
	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) {
1897
		pr_debug("Error Building GET Lifecycle Status command\n");
1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
		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) {
1916
		pr_debug("%s: Couldn't extract PIN from response\n", __func__);
1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928
		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;
}

1929
static int get_msid_cpin_pin(struct opal_dev *dev, void *data)
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957
{
	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) {
1958
		pr_debug("Error building Get MSID CPIN PIN command.\n");
1959 1960 1961 1962 1963 1964
		return err;
	}

	return finalize_and_send(dev, get_msid_cpin_pin_cont);
}

1965
static int end_opal_session(struct opal_dev *dev, void *data)
1966 1967 1968 1969 1970 1971 1972
{
	int err = 0;

	clear_opal_cmd(dev);
	set_comid(dev, dev->comid);
	add_token_u8(&err, dev, OPAL_ENDOFSESSION);

1973 1974
	if (err < 0)
		return err;
1975 1976 1977 1978 1979
	return finalize_and_send(dev, end_session_cont);
}

static int end_opal_session_error(struct opal_dev *dev)
{
1980 1981 1982
	const struct opal_step error_end_session[] = {
		{ end_opal_session, },
		{ NULL, }
1983
	};
1984
	dev->steps = error_end_session;
1985 1986 1987 1988
	return next(dev);
}

static inline void setup_opal_dev(struct opal_dev *dev,
1989
				  const struct opal_step *steps)
1990
{
1991
	dev->steps = steps;
1992 1993 1994 1995 1996 1997 1998
	dev->tsn = 0;
	dev->hsn = 0;
	dev->prev_data = NULL;
}

static int check_opal_support(struct opal_dev *dev)
{
1999 2000 2001
	const struct opal_step steps[] = {
		{ opal_discovery0, },
		{ NULL, }
2002 2003 2004 2005
	};
	int ret;

	mutex_lock(&dev->dev_lock);
2006
	setup_opal_dev(dev, steps);
2007 2008 2009 2010 2011 2012
	ret = next(dev);
	dev->supported = !ret;
	mutex_unlock(&dev->dev_lock);
	return ret;
}

2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034
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);

2035
struct opal_dev *init_opal_dev(void *data, sec_send_recv *send_recv)
2036
{
2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047
	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) {
2048
		pr_debug("Opal is not supported on this device\n");
2049 2050 2051 2052
		kfree(dev);
		return NULL