| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright © 2016 Intel Corporation |
| * |
| * Authors: |
| * Scott Bauer <scott.bauer@intel.com> |
| * Rafael Antognolli <rafael.antognolli@intel.com> |
| */ |
| |
| #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/blkdev.h> |
| #include <linux/slab.h> |
| #include <linux/uaccess.h> |
| #include <uapi/linux/sed-opal.h> |
| #include <linux/sed-opal.h> |
| #include <linux/sed-opal-key.h> |
| #include <linux/string.h> |
| #include <linux/kdev_t.h> |
| #include <linux/key.h> |
| #include <linux/key-type.h> |
| #include <keys/user-type.h> |
| |
| #include "opal_proto.h" |
| |
| #define IO_BUFFER_LENGTH 2048 |
| #define MAX_TOKS 64 |
| |
| /* Number of bytes needed by cmd_finalize. */ |
| #define CMD_FINALIZE_BYTES_NEEDED 7 |
| |
| static struct key *sed_opal_keyring; |
| |
| 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 { |
| u32 flags; |
| |
| void *data; |
| sec_send_recv *send_recv; |
| |
| struct mutex dev_lock; |
| u16 comid; |
| u32 hsn; |
| u32 tsn; |
| u64 align; /* alignment granularity */ |
| u64 lowest_lba; |
| u32 logical_block_size; |
| u8 align_required; /* ALIGN: 0 or 1 */ |
| |
| size_t pos; |
| u8 *cmd; |
| u8 *resp; |
| |
| 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_TABLE_TABLE] = |
| { 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01 }, |
| [OPAL_LOCKINGRANGE_GLOBAL] = |
| { 0x00, 0x00, 0x08, 0x02, 0x00, 0x00, 0x00, 0x01 }, |
| [OPAL_LOCKINGRANGE_ACE_START_TO_KEY] = |
| { 0x00, 0x00, 0x00, 0x08, 0x00, 0x03, 0xD0, 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 }, |
| [OPAL_DATASTORE] = |
| { 0x00, 0x00, 0x10, 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_METHOD_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); |
| static int opal_discovery0_step(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 |
| } |
| |
| /* |
| * Allocate/update a SED Opal key and add it to the SED Opal keyring. |
| */ |
| static int update_sed_opal_key(const char *desc, u_char *key_data, int keylen) |
| { |
| key_ref_t kr; |
| |
| if (!sed_opal_keyring) |
| return -ENOKEY; |
| |
| kr = key_create_or_update(make_key_ref(sed_opal_keyring, true), "user", |
| desc, (const void *)key_data, keylen, |
| KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_WRITE, |
| KEY_ALLOC_NOT_IN_QUOTA | KEY_ALLOC_BUILT_IN | |
| KEY_ALLOC_BYPASS_RESTRICTION); |
| if (IS_ERR(kr)) { |
| pr_err("Error adding SED key (%ld)\n", PTR_ERR(kr)); |
| return PTR_ERR(kr); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Read a SED Opal key from the SED Opal keyring. |
| */ |
| static int read_sed_opal_key(const char *key_name, u_char *buffer, int buflen) |
| { |
| int ret; |
| key_ref_t kref; |
| struct key *key; |
| |
| if (!sed_opal_keyring) |
| return -ENOKEY; |
| |
| kref = keyring_search(make_key_ref(sed_opal_keyring, true), |
| &key_type_user, key_name, true); |
| |
| if (IS_ERR(kref)) |
| return PTR_ERR(kref); |
| |
| key = key_ref_to_ptr(kref); |
| down_read(&key->sem); |
| ret = key_validate(key); |
| if (ret == 0) { |
| if (buflen > key->datalen) |
| buflen = key->datalen; |
| |
| ret = key->type->read(key, (char *)buffer, buflen); |
| } |
| up_read(&key->sem); |
| |
| key_ref_put(kref); |
| |
| return ret; |
| } |
| |
| static int opal_get_key(struct opal_dev *dev, struct opal_key *key) |
| { |
| int ret = 0; |
| |
| switch (key->key_type) { |
| case OPAL_INCLUDED: |
| /* the key is ready to use */ |
| break; |
| case OPAL_KEYRING: |
| /* the key is in the keyring */ |
| ret = read_sed_opal_key(OPAL_AUTH_KEY, key->key, OPAL_KEY_MAX); |
| if (ret > 0) { |
| if (ret > U8_MAX) { |
| ret = -ENOSPC; |
| goto error; |
| } |
| key->key_len = ret; |
| key->key_type = OPAL_INCLUDED; |
| } |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| if (ret < 0) |
| goto error; |
| |
| /* must have a PEK by now or it's an error */ |
| if (key->key_type != OPAL_INCLUDED || key->key_len == 0) { |
| ret = -EINVAL; |
| goto error; |
| } |
| return 0; |
| error: |
| pr_debug("Error getting password: %d\n", ret); |
| return ret; |
| } |
| |
| 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_lcksuppt(const void *data) |
| { |
| const struct d0_locking_features *lfeat = data; |
| u8 sup_feat = lfeat->supported_features; |
| |
| return !!(sup_feat & LOCKING_SUPPORTED_MASK); |
| } |
| |
| static bool check_lckenabled(const void *data) |
| { |
| const struct d0_locking_features *lfeat = data; |
| u8 sup_feat = lfeat->supported_features; |
| |
| return !!(sup_feat & LOCKING_ENABLED_MASK); |
| } |
| |
| static bool check_locked(const void *data) |
| { |
| const struct d0_locking_features *lfeat = data; |
| u8 sup_feat = lfeat->supported_features; |
| |
| return !!(sup_feat & LOCKED_MASK); |
| } |
| |
| 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_mbrdone(const void *data) |
| { |
| const struct d0_locking_features *lfeat = data; |
| u8 sup_feat = lfeat->supported_features; |
| |
| return !!(sup_feat & MBR_DONE_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 = be64_to_cpu(geo->alignment_granularity); |
| dev->lowest_lba = be64_to_cpu(geo->lowest_aligned_lba); |
| dev->logical_block_size = be32_to_cpu(geo->logical_block_size); |
| dev->align_required = geo->reserved01 & 1; |
| } |
| |
| static int execute_step(struct opal_dev *dev, |
| const struct opal_step *step, size_t stepIndex) |
| { |
| int error = step->fn(dev, step->data); |
| |
| if (error) { |
| pr_debug("Step %zu (%pS) failed with error %d: %s\n", |
| stepIndex, step->fn, error, |
| opal_error_to_human(error)); |
| } |
| |
| return error; |
| } |
| |
| static int execute_steps(struct opal_dev *dev, |
| const struct opal_step *steps, size_t n_steps) |
| { |
| size_t state = 0; |
| int error; |
| |
| /* first do a discovery0 */ |
| error = opal_discovery0_step(dev); |
| if (error) |
| return error; |
| |
| for (state = 0; state < n_steps; state++) { |
| error = execute_step(dev, &steps[state], state); |
| if (error) |
| goto out_error; |
| } |
| |
| return 0; |
| |
| out_error: |
| /* |
| * For each OPAL command the first step in steps starts some sort of |
| * session. If an error occurred in the initial discovery0 or if an |
| * error occurred in the first step (and thus stopping the loop with |
| * state == 0) then there was an error before 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 > 0) |
| end_opal_session_error(dev); |
| |
| return error; |
| } |
| |
| static int opal_discovery0_end(struct opal_dev *dev, void *data) |
| { |
| struct opal_discovery *discv_out = data; /* may be NULL */ |
| u8 __user *buf_out; |
| u64 len_out; |
| 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->flags &= OPAL_FL_SUPPORTED; |
| |
| 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; |
| } |
| |
| if (discv_out) { |
| buf_out = (u8 __user *)(uintptr_t)discv_out->data; |
| len_out = min_t(u64, discv_out->size, hlen); |
| if (buf_out && copy_to_user(buf_out, dev->resp, len_out)) |
| return -EFAULT; |
| |
| discv_out->size = hlen; /* actual size of data */ |
| } |
| |
| 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); |
| if (single_user) |
| dev->flags |= OPAL_FL_SUM_SUPPORTED; |
| break; |
| case FC_GEOMETRY: |
| check_geometry(dev, body); |
| break; |
| case FC_LOCKING: |
| if (check_lcksuppt(body->features)) |
| dev->flags |= OPAL_FL_LOCKING_SUPPORTED; |
| if (check_lckenabled(body->features)) |
| dev->flags |= OPAL_FL_LOCKING_ENABLED; |
| if (check_locked(body->features)) |
| dev->flags |= OPAL_FL_LOCKED; |
| if (check_mbrenabled(body->features)) |
| dev->flags |= OPAL_FL_MBR_ENABLED; |
| if (check_mbrdone(body->features)) |
| dev->flags |= OPAL_FL_MBR_DONE; |
| 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, data); |
| } |
| |
| static int opal_discovery0_step(struct opal_dev *dev) |
| { |
| const struct opal_step discovery0_step = { |
| opal_discovery0, NULL |
| }; |
| |
| return execute_step(dev, &discovery0_step, 0); |
| } |
| |
| static size_t remaining_size(struct opal_dev *cmd) |
| { |
| return IO_BUFFER_LENGTH - cmd->pos; |
| } |
| |
| static bool can_add(int *err, struct opal_dev *cmd, size_t len) |
| { |
| if (*err) |
| return false; |
| |
| if (remaining_size(cmd) < len) { |
| pr_debug("Error adding %zu bytes: end of buffer.\n", len); |
| *err = -ERANGE; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void add_token_u8(int *err, struct opal_dev *cmd, u8 tok) |
| { |
| if (!can_add(err, cmd, 1)) |
| 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 (!can_add(err, cmd, len + 1)) { |
| pr_debug("Error adding u64: end of buffer.\n"); |
| return; |
| } |
| add_short_atom_header(cmd, false, false, len); |
| while (len--) |
| add_token_u8(err, cmd, number >> (len * 8)); |
| } |
| |
| static u8 *add_bytestring_header(int *err, struct opal_dev *cmd, size_t len) |
| { |
| size_t header_len = 1; |
| bool is_short_atom = true; |
| |
| if (len & ~SHORT_ATOM_LEN_MASK) { |
| header_len = 2; |
| is_short_atom = false; |
| } |
| |
| if (!can_add(err, cmd, header_len + len)) { |
| pr_debug("Error adding bytestring: end of buffer.\n"); |
| return NULL; |
| } |
| |
| if (is_short_atom) |
| add_short_atom_header(cmd, true, false, len); |
| else |
| add_medium_atom_header(cmd, true, false, len); |
| |
| return &cmd->cmd[cmd->pos]; |
| } |
| |
| static void add_token_bytestring(int *err, struct opal_dev *cmd, |
| const u8 *bytestring, size_t len) |
| { |
| u8 *start; |
| |
| start = add_bytestring_header(err, cmd, len); |
| if (!start) |
| return; |
| memcpy(start, 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; |
| |
| /* |
| * Close the parameter list opened from cmd_start. |
| * The number of bytes added must be equal to |
| * CMD_FINALIZE_BYTES_NEEDED. |
| */ |
| add_token_u8(&err, cmd, OPAL_ENDLIST); |
| |
| 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 (!resp) { |
| pr_debug("Response is NULL\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| 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 if (pos[0] == EMPTY_ATOM_BYTE) /* empty atom */ |
| token_length = 1; |
| else /* TOKEN */ |
| token_length = response_parse_token(iter, pos); |
| |
| if (token_length < 0) |
| return token_length; |
| |
| if (pos[0] != EMPTY_ATOM_BYTE) |
| num_entries++; |
| |
| pos += token_length; |
| total -= token_length; |
| iter++; |
| } |
| |
| 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 *tok; |
| |
| *store = NULL; |
| tok = response_get_token(resp, n); |
| if (IS_ERR(tok)) |
| return 0; |
| |
| if (tok->type != OPAL_DTA_TOKENID_BYTESTRING) { |
| pr_debug("Token is not a byte string!\n"); |
| return 0; |
| } |
| |
| switch (tok->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 = tok->pos + skip; |
| |
| return tok->len - skip; |
| } |
| |
| static u64 response_get_u64(const struct parsed_resp *resp, int n) |
| { |
| const struct opal_resp_tok *tok; |
| |
| tok = response_get_token(resp, n); |
| if (IS_ERR(tok)) |
| return 0; |
| |
| if (tok->type != OPAL_DTA_TOKENID_UINT) { |
| pr_debug("Token is not unsigned int: %d\n", tok->type); |
| return 0; |
| } |
| |
| if (tok->width != OPAL_WIDTH_TINY && tok->width != OPAL_WIDTH_SHORT) { |
| pr_debug("Atom is not short or tiny: %d\n", tok->width); |
| return 0; |
| } |
| |
| return tok->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 cmd_start(struct opal_dev *dev, const u8 *uid, const u8 *method) |
| { |
| int err = 0; |
| |
| clear_opal_cmd(dev); |
| set_comid(dev, dev->comid); |
| |
| add_token_u8(&err, dev, OPAL_CALL); |
| add_token_bytestring(&err, dev, uid, OPAL_UID_LENGTH); |
| add_token_bytestring(&err, dev, method, OPAL_METHOD_LENGTH); |
| |
| /* |
| * Every method call is followed by its parameters enclosed within |
| * OPAL_STARTLIST and OPAL_ENDLIST tokens. We automatically open the |
| * parameter list here and close it later in cmd_finalize. |
| */ |
| add_token_u8(&err, dev, OPAL_STARTLIST); |
| |
| return err; |
| } |
| |
| static int start_opal_session_cont(struct opal_dev *dev) |
| { |
| u32 hsn, tsn; |
| int error; |
| |
| 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 != GENERIC_HOST_SESSION_NUM || tsn < FIRST_TPER_SESSION_NUM) { |
| 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 generic_get_columns(struct opal_dev *dev, const u8 *table, |
| u64 start_column, u64 end_column) |
| { |
| int err; |
| |
| err = cmd_start(dev, table, opalmethod[OPAL_GET]); |
| |
| add_token_u8(&err, dev, OPAL_STARTLIST); |
| |
| add_token_u8(&err, dev, OPAL_STARTNAME); |
| add_token_u8(&err, dev, OPAL_STARTCOLUMN); |
| add_token_u64(&err, dev, start_column); |
| add_token_u8(&err, dev, OPAL_ENDNAME); |
| |
| add_token_u8(&err, dev, OPAL_STARTNAME); |
| add_token_u8(&err, dev, OPAL_ENDCOLUMN); |
| add_token_u64(&err, dev, end_column); |
| add_token_u8(&err, dev, OPAL_ENDNAME); |
| |
| add_token_u8(&err, dev, OPAL_ENDLIST); |
| |
| if (err) |
| return err; |
| |
| return finalize_and_send(dev, parse_and_check_status); |
| } |
| |
| /* |
| * request @column from table @table on device @dev. On success, the column |
| * data will be available in dev->resp->tok[4] |
| */ |
| static int generic_get_column(struct opal_dev *dev, const u8 *table, |
| u64 column) |
| { |
| return generic_get_columns(dev, table, column, column); |
| } |
| |
| /* |
| * see TCG SAS 5.3.2.3 for a description of the available columns |
| * |
| * the result is provided in dev->resp->tok[4] |
| */ |
| static int generic_get_table_info(struct opal_dev *dev, const u8 *table_uid, |
| u64 column) |
| { |
| u8 uid[OPAL_UID_LENGTH]; |
| const unsigned int half = OPAL_UID_LENGTH_HALF; |
| |
| /* sed-opal UIDs can be split in two halves: |
| * first: actual table index |
| * second: relative index in the table |
| * so we have to get the first half of the OPAL_TABLE_TABLE and use the |
| * first part of the target table as relative index into that table |
| */ |
| memcpy(uid, opaluid[OPAL_TABLE_TABLE], half); |
| memcpy(uid + half, table_uid, half); |
| |
| return generic_get_column(dev, uid, column); |
| } |
| |
| static int gen_key(struct opal_dev *dev, void *data) |
| { |
| u8 uid[OPAL_UID_LENGTH]; |
| int err; |
| |
| memcpy(uid, dev->prev_data, min(sizeof(uid), dev->prev_d_len)); |
| kfree(dev->prev_data); |
| dev->prev_data = NULL; |
| |
| err = cmd_start(dev, uid, opalmethod[OPAL_GENKEY]); |
| |
| 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; |
| |
| 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; |
| u8 *lr = data; |
| |
| err = build_locking_range(uid, sizeof(uid), *lr); |
| if (err) |
| return err; |
| |
| err = generic_get_column(dev, uid, OPAL_ACTIVEKEY); |
| if (err) |
| return err; |
| |
| return get_active_key_cont(dev); |
| } |
| |
| static int generic_table_write_data(struct opal_dev *dev, const u64 data, |
| u64 offset, u64 size, const u8 *uid) |
| { |
| const u8 __user *src = (u8 __user *)(uintptr_t)data; |
| u8 *dst; |
| u64 len; |
| size_t off = 0; |
| int err; |
| |
| /* do we fit in the available space? */ |
| err = generic_get_table_info(dev, uid, OPAL_TABLE_ROWS); |
| if (err) { |
| pr_debug("Couldn't get the table size\n"); |
| return err; |
| } |
| |
| len = response_get_u64(&dev->parsed, 4); |
| if (size > len || offset > len - size) { |
| pr_debug("Does not fit in the table (%llu vs. %llu)\n", |
| offset + size, len); |
| return -ENOSPC; |
| } |
| |
| /* do the actual transmission(s) */ |
| while (off < size) { |
| err = cmd_start(dev, uid, opalmethod[OPAL_SET]); |
| add_token_u8(&err, dev, OPAL_STARTNAME); |
| add_token_u8(&err, dev, OPAL_WHERE); |
| add_token_u64(&err, dev, offset + off); |
| add_token_u8(&err, dev, OPAL_ENDNAME); |
| |
| add_token_u8(&err, dev, OPAL_STARTNAME); |
| add_token_u8(&err, dev, OPAL_VALUES); |
| |
| /* |
| * The bytestring header is either 1 or 2 bytes, so assume 2. |
| * There also needs to be enough space to accommodate the |
| * trailing OPAL_ENDNAME (1 byte) and tokens added by |
| * cmd_finalize. |
| */ |
| len = min(remaining_size(dev) - (2+1+CMD_FINALIZE_BYTES_NEEDED), |
| (size_t)(size - off)); |
| pr_debug("Write bytes %zu+%llu/%llu\n", off, len, size); |
| |
| dst = add_bytestring_header(&err, dev, len); |
| if (!dst) |
| break; |
| |
| if (copy_from_user(dst, src + off, len)) { |
| err = -EFAULT; |
| break; |
| } |
| |
| dev->pos += len; |
| |
| add_token_u8(&err, dev, OPAL_ENDNAME); |
| if (err) |
| break; |
| |
| err = finalize_and_send(dev, parse_and_check_status); |
| if (err) |
| break; |
| |
| off += len; |
| } |
| |
| return err; |
| } |
| |
| static int generic_lr_enable_disable(struct opal_dev *dev, |
| u8 *uid, bool rle, bool wle, |
| bool rl, bool wl) |
| { |
| int err; |
| |
| err = cmd_start(dev, uid, opalmethod[OPAL_SET]); |
| |
| 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_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, OPAL_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); |
| |
| 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; |
| |
| 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 { |
| err = cmd_start(dev, uid, opalmethod[OPAL_SET]); |
| |
| 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_RANGESTART); |
| 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, OPAL_RANGELENGTH); |
| 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, OPAL_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, OPAL_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); |
| } |
| if (err) { |
| pr_debug("Error building Setup Locking range command.\n"); |
| return err; |
| } |
| |
| return finalize_and_send(dev, parse_and_check_status); |
| } |
| |
| static int response_get_column(const struct parsed_resp *resp, |
| int *iter, |
| u8 column, |
| u64 *value) |
| { |
| const struct opal_resp_tok *tok; |
| int n = *iter; |
| u64 val; |
| |
| tok = response_get_token(resp, n); |
| if (IS_ERR(tok)) |
| return PTR_ERR(tok); |
| |
| if (!response_token_matches(tok, OPAL_STARTNAME)) { |
| pr_debug("Unexpected response token type %d.\n", n); |
| return OPAL_INVAL_PARAM; |
| } |
| n++; |
| |
| if (response_get_u64(resp, n) != column) { |
| pr_debug("Token %d does not match expected column %u.\n", |
| n, column); |
| return OPAL_INVAL_PARAM; |
| } |
| n++; |
| |
| val = response_get_u64(resp, n); |
| n++; |
| |
| tok = response_get_token(resp, n); |
| if (IS_ERR(tok)) |
| return PTR_ERR(tok); |
| |
| if (!response_token_matches(tok, OPAL_ENDNAME)) { |
| pr_debug("Unexpected response token type %d.\n", n); |
| return OPAL_INVAL_PARAM; |
| } |
| n++; |
| |
| *value = val; |
| *iter = n; |
| |
| return 0; |
| } |
| |
| static int locking_range_status(struct opal_dev *dev, void *data) |
| { |
| u8 lr_buffer[OPAL_UID_LENGTH]; |
| u64 resp; |
| bool rlocked, wlocked; |
| int err, tok_n = 2; |
| struct opal_lr_status *lrst = data; |
| |
| err = build_locking_range(lr_buffer, sizeof(lr_buffer), |
| lrst->session.opal_key.lr); |
| if (err) |
| return err; |
| |
| err = generic_get_columns(dev, lr_buffer, OPAL_RANGESTART, |
| OPAL_WRITELOCKED); |
| if (err) { |
| pr_debug("Couldn't get lr %u table columns %d to %d.\n", |
| lrst->session.opal_key.lr, OPAL_RANGESTART, |
| OPAL_WRITELOCKED); |
| return err; |
| } |
| |
| /* range start */ |
| err = response_get_column(&dev->parsed, &tok_n, OPAL_RANGESTART, |
| &lrst->range_start); |
| if (err) |
| return err; |
| |
| /* range length */ |
| err = response_get_column(&dev->parsed, &tok_n, OPAL_RANGELENGTH, |
| &lrst->range_length); |
| if (err) |
| return err; |
| |
| /* RLE */ |
| err = response_get_column(&dev->parsed, &tok_n, OPAL_READLOCKENABLED, |
| &resp); |
| if (err) |
| return err; |
| |
| lrst->RLE = !!resp; |
| |
| /* WLE */ |
| err = response_get_column(&dev->parsed, &tok_n, OPAL_WRITELOCKENABLED, |
| &resp); |
| if (err) |
| return err; |
| |
| lrst->WLE = !!resp; |
| |
| /* read locked */ |
| err = response_get_column(&dev->parsed, &tok_n, OPAL_READLOCKED, &resp); |
| if (err) |
| return err; |
| |
| rlocked = !!resp; |
| |
| /* write locked */ |
| err = response_get_column(&dev->parsed, &tok_n, OPAL_WRITELOCKED, &resp); |
| if (err) |
| return err; |
| |
| wlocked = !!resp; |
| |
| /* opal_lock_state can not map 'read locked' only state. */ |
| lrst->l_state = OPAL_RW; |
| if (rlocked && wlocked) |
| lrst->l_state = OPAL_LK; |
| else if (wlocked) |
| lrst->l_state = OPAL_RO; |
| else if (rlocked) { |
| pr_debug("Can not report read locked only state.\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| |
| if (key == NULL && auth != OPAL_ANYBODY_UID) |
| return OPAL_INVAL_PARAM; |
| |
| hsn = GENERIC_HOST_SESSION_NUM; |
| err = cmd_start(dev, opaluid[OPAL_SMUID_UID], |
| opalmethod[OPAL_STARTSESSION]); |
| |
| 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: |
| break; |
| case OPAL_ADMIN1_UID: |
| case OPAL_SID_UID: |
| case OPAL_PSID_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); |
| 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_PSID_opal_session(struct opal_dev *dev, void *data) |
| { |
| const struct opal_key *okey = data; |
| |
| return start_generic_opal_session(dev, OPAL_PSID_UID, |
| OPAL_ADMINSP_UID, |
| okey->key, |
| okey->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; |
| |
| if (session->sum) |
| err = build_locking_user(lk_ul_user, sizeof(lk_ul_user), |
| session->opal_key.lr); |
| else if (session->who != OPAL_ADMIN1 && !session->sum) |
| err = build_locking_user(lk_ul_user, sizeof(lk_ul_user), |
| session->who - 1); |
| else |
| memcpy(lk_ul_user, opaluid[OPAL_ADMIN1_UID], OPAL_UID_LENGTH); |
| |
| if (err) |
| return err; |
| |
| err = cmd_start(dev, opaluid[OPAL_SMUID_UID], |
| opalmethod[OPAL_STARTSESSION]); |
| |
| 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); |
| |
| 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; |
| |
| err = cmd_start(dev, opaluid[OPAL_ADMINSP_UID], |
| opalmethod[OPAL_REVERT]); |
| 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; |
| |
| memcpy(uid, opaluid[OPAL_USER1_UID], OPAL_UID_LENGTH); |
| uid[7] = session->who; |
| |
| err = cmd_start(dev, uid, opalmethod[OPAL_SET]); |
| 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); |
| |
| if (err) { |
| pr_debug("Error building Activate UserN command.\n"); |
| return err; |
| } |
| |
| return finalize_and_send(dev, parse_and_check_status); |
| } |
| |
| static int revert_lsp(struct opal_dev *dev, void *data) |
| { |
| struct opal_revert_lsp *rev = data; |
| int err; |
| |
| err = cmd_start(dev, opaluid[OPAL_THISSP_UID], |
| opalmethod[OPAL_REVERTSP]); |
| add_token_u8(&err, dev, OPAL_STARTNAME); |
| add_token_u64(&err, dev, OPAL_KEEP_GLOBAL_RANGE_KEY); |
| add_token_u8(&err, dev, (rev->options & OPAL_PRESERVE) ? |
| OPAL_TRUE : OPAL_FALSE); |
| add_token_u8(&err, dev, OPAL_ENDNAME); |
| if (err) { |
| pr_debug("Error building REVERT SP 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; |
| |
| if (build_locking_range(uid, sizeof(uid), session->opal_key.lr) < 0) |
| return -ERANGE; |
| |
| err = cmd_start(dev, uid, opalmethod[OPAL_ERASE]); |
| |
| 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; |
| |
| err = cmd_start(dev, opaluid[OPAL_MBRCONTROL], |
| opalmethod[OPAL_SET]); |
| |
| 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_MBRDONE); |
| 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); |
| |
| 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; |
| |
| err = cmd_start(dev, opaluid[OPAL_MBRCONTROL], |
| opalmethod[OPAL_SET]); |
| |
| 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_MBRENABLE); |
| 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); |
| |
| if (err) { |
| pr_debug("Error Building set MBR done command\n"); |
| return err; |
| } |
| |
| return finalize_and_send(dev, parse_and_check_status); |
| } |
| |
| static int write_shadow_mbr(struct opal_dev *dev, void *data) |
| { |
| struct opal_shadow_mbr *shadow = data; |
| |
| return generic_table_write_data(dev, shadow->data, shadow->offset, |
| shadow->size, opaluid[OPAL_MBR]); |
| } |
| |
| static int generic_pw_cmd(u8 *key, size_t key_len, u8 *cpin_uid, |
| struct opal_dev *dev) |
| { |
| int err; |
| |
| err = cmd_start(dev, cpin_uid, opalmethod[OPAL_SET]); |
| |
| 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_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); |
| |
| 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 void add_authority_object_ref(int *err, |
| struct opal_dev *dev, |
| const u8 *uid, |
| size_t uid_len) |
| { |
| 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, uid, uid_len); |
| add_token_u8(err, dev, OPAL_ENDNAME); |
| } |
| |
| static void add_boolean_object_ref(int *err, |
| struct opal_dev *dev, |
| u8 boolean_op) |
| { |
| 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, boolean_op); |
| add_token_u8(err, dev, OPAL_ENDNAME); |
| } |
| |
| static int set_lr_boolean_ace(struct opal_dev *dev, |
| unsigned int opal_uid, |
| u8 lr, |
| const u8 *users, |
| size_t users_len) |
| { |
| u8 lr_buffer[OPAL_UID_LENGTH]; |
| u8 user_uid[OPAL_UID_LENGTH]; |
| u8 u; |
| int err; |
| |
| memcpy(lr_buffer, opaluid[opal_uid], OPAL_UID_LENGTH); |
| lr_buffer[7] = lr; |
| |
| err = cmd_start(dev, lr_buffer, opalmethod[OPAL_SET]); |
| |
| 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); |
| |
| for (u = 0; u < users_len; u++) { |
| if (users[u] == OPAL_ADMIN1) |
| memcpy(user_uid, opaluid[OPAL_ADMIN1_UID], |
| OPAL_UID_LENGTH); |
| else { |
| memcpy(user_uid, opaluid[OPAL_USER1_UID], |
| OPAL_UID_LENGTH); |
| user_uid[7] = users[u]; |
| } |
| |
| add_authority_object_ref(&err, dev, user_uid, sizeof(user_uid)); |
| |
| /* |
| * Add boolean operator in postfix only with |
| * two or more authorities being added in ACE |
| * expresion. |
| * */ |
| if (u > 0) |
| add_boolean_object_ref(&err, dev, OPAL_BOOLEAN_OR); |
| } |
| |
| 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); |
| |
| return err; |
| } |
| |
| static int add_user_to_lr(struct opal_dev *dev, void *data) |
| { |
| int err; |
| struct opal_lock_unlock *lkul = data; |
| const u8 users[] = { |
| lkul->session.who |
| }; |
| |
| err = set_lr_boolean_ace(dev, |
| lkul->l_state == OPAL_RW ? |
| OPAL_LOCKINGRANGE_ACE_WRLOCKED : |
| OPAL_LOCKINGRANGE_ACE_RDLOCKED, |
| lkul->session.opal_key.lr, users, |
| ARRAY_SIZE(users)); |
| 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 add_user_to_lr_ace(struct opal_dev *dev, void *data) |
| { |
| int err; |
| struct opal_lock_unlock *lkul = data; |
| const u8 users[] = { |
| OPAL_ADMIN1, |
| lkul->session.who |
| }; |
| |
| err = set_lr_boolean_ace(dev, OPAL_LOCKINGRANGE_ACE_START_TO_KEY, |
| lkul->session.opal_key.lr, users, |
| ARRAY_SIZE(users)); |
| |
| if (err) { |
| pr_debug("Error building add user to locking ranges ACEs.\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; |
| |
| 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 initialized to locked */ |
| break; |
| default: |
| pr_debug("Tried to set an invalid locking state... returning to uland\n"); |
| return OPAL_INVAL_PARAM; |
| } |
| |
| err = cmd_start(dev, lr_buffer, opalmethod[OPAL_SET]); |
| |
| 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); |
| |
| 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 initialized 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]; |
| int err, i; |
| |
| err = cmd_start(dev, opaluid[OPAL_LOCKINGSP_UID], |
| opalmethod[OPAL_ACTIVATE]); |
| |
| 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_STARTNAME); |
| add_token_u64(&err, dev, OPAL_SUM_SET_LIST); |
| |
| 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); |
| } |
| |
| if (err) { |
| pr_debug("Error building Activate LockingSP command.\n"); |
| return err; |
| } |
| |
| return finalize_and_send(dev, parse_and_check_status); |
| } |
| |
| /* Determine if we're in the Manufactured Inactive or Active state */ |
| static int get_lsp_lifecycle(struct opal_dev *dev, void *data) |
| { |
| u8 lc_status; |
| int err; |
| |
| err = generic_get_column(dev, opaluid[OPAL_LOCKINGSP_UID], |
| OPAL_LIFECYCLE); |
| if (err) |
| return err; |
| |
| lc_status = response_get_u64(&dev->parsed, 4); |
| /* 0x08 is Manufactured 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; |
| } |
| |
| static int get_msid_cpin_pin(struct opal_dev *dev, void *data) |
| { |
| const char *msid_pin; |
| size_t strlen; |
| int err; |
| |
| err = generic_get_column(dev, opaluid[OPAL_C_PIN_MSID], OPAL_PIN); |
| if (err) |
| return err; |
| |
| strlen = response_get_string(&dev->parsed, 4, &msid_pin); |
| if (!msid_pin) { |
| pr_debug("Couldn't extract MSID_CPIN from response\n"); |
| 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 write_table_data(struct opal_dev *dev, void *data) |
| { |
| struct opal_read_write_table *write_tbl = data; |
| |
| return generic_table_write_data(dev, write_tbl->data, write_tbl->offset, |
| write_tbl->size, write_tbl->table_uid); |
| } |
| |
| static int read_table_data_cont(struct opal_dev *dev) |
| { |
| int err; |
| const char *data_read; |
| |
| err = parse_and_check_status(dev); |
| if (err) |
| return err; |
| |
| dev->prev_d_len = response_get_string(&dev->parsed, 1, &data_read); |
| dev->prev_data = (void *)data_read; |
| if (!dev->prev_data) { |
| pr_debug("%s: Couldn't read data from the table.\n", __func__); |
| return OPAL_INVAL_PARAM; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * IO_BUFFER_LENGTH = 2048 |
| * sizeof(header) = 56 |
| * No. of Token Bytes in the Response = 11 |
| * MAX size of data that can be carried in response buffer |
| * at a time is : 2048 - (56 + 11) = 1981 = 0x7BD. |
| */ |
| #define OPAL_MAX_READ_TABLE (0x7BD) |
| |
| static int read_table_data(struct opal_dev *dev, void *data) |
| { |
| struct opal_read_write_table *read_tbl = data; |
| int err; |
| size_t off = 0, max_read_size = OPAL_MAX_READ_TABLE; |
| u64 table_len, len; |
| u64 offset = read_tbl->offset, read_size = read_tbl->size - 1; |
| u8 __user *dst; |
| |
| err = generic_get_table_info(dev, read_tbl->table_uid, OPAL_TABLE_ROWS); |
| if (err) { |
| pr_debug("Couldn't get the table size\n"); |
| return err; |
| } |
| |
| table_len = response_get_u64(&dev->parsed, 4); |
| |
| /* Check if the user is trying to read from the table limits */ |
| if (read_size > table_len || offset > table_len - read_size) { |
| pr_debug("Read size exceeds the Table size limits (%llu vs. %llu)\n", |
| offset + read_size, table_len); |
| return -EINVAL; |
| } |
| |
| while (off < read_size) { |
| err = cmd_start(dev, read_tbl->table_uid, opalmethod[OPAL_GET]); |
| |
| add_token_u8(&err, dev, OPAL_STARTLIST); |
| add_token_u8(&err, dev, OPAL_STARTNAME); |
| add_token_u8(&err, dev, OPAL_STARTROW); |
| add_token_u64(&err, dev, offset + off); /* start row value */ |
| add_token_u8(&err, dev, OPAL_ENDNAME); |
| |
| add_token_u8(&err, dev, OPAL_STARTNAME); |
| add_token_u8(&err, dev, OPAL_ENDROW); |
| |
| len = min(max_read_size, (size_t)(read_size - off)); |
| add_token_u64(&err, dev, offset + off + len); /* end row value |
| */ |
| add_token_u8(&err, dev, OPAL_ENDNAME); |
| add_token_u8(&err, dev, OPAL_ENDLIST); |
| |
| if (err) { |
| pr_debug("Error building read table data command.\n"); |
| break; |
| } |
| |
| err = finalize_and_send(dev, read_table_data_cont); |
| if (err) |
| break; |
| |
| /* len+1: This includes the NULL terminator at the end*/ |
| if (dev->prev_d_len > len + 1) { |
| err = -EOVERFLOW; |
| break; |
| } |
| |
| dst = (u8 __user *)(uintptr_t)read_tbl->data; |
| if (copy_to_user(dst + off, dev->prev_data, dev->prev_d_len)) { |
| pr_debug("Error copying data to userspace\n"); |
| err = -EFAULT; |
| break; |
| } |
| dev->prev_data = NULL; |
| |
| off += len; |
| } |
| |
| return err; |
| } |
| |
| 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, |
| }; |
| |
| return execute_step(dev, &error_end_session, 0); |
| } |
| |
| static inline void setup_opal_dev(struct opal_dev *dev) |
| { |
| dev->tsn = 0; |
| dev->hsn = 0; |
| dev->prev_data = NULL; |
| } |
| |
| static int check_opal_support(struct opal_dev *dev) |
| { |
| int ret; |
| |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = opal_discovery0_step(dev); |
| if (!ret) |
| dev->flags |= OPAL_FL_SUPPORTED; |
| 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->resp); |
| kfree(dev->cmd); |
| 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; |
| |
| /* |
| * Presumably DMA-able buffers must be cache-aligned. Kmalloc makes |
| * sure the allocated buffer is DMA-safe in that regard. |
| */ |
| dev->cmd = kmalloc(IO_BUFFER_LENGTH, GFP_KERNEL); |
| if (!dev->cmd) |
| goto err_free_dev; |
| |
| dev->resp = kmalloc(IO_BUFFER_LENGTH, GFP_KERNEL); |
| if (!dev->resp) |
| goto err_free_cmd; |
| |
| INIT_LIST_HEAD(&dev->unlk_lst); |
| mutex_init(&dev->dev_lock); |
| dev->flags = 0; |
| dev->data = data; |
| dev->send_recv = send_recv; |
| if (check_opal_support(dev) != 0) { |
| pr_debug("Opal is not supported on this device\n"); |
| goto err_free_resp; |
| } |
| |
| return dev; |
| |
| err_free_resp: |
| kfree(dev->resp); |
| |
| err_free_cmd: |
| kfree(dev->cmd); |
| |
| err_free_dev: |
| kfree(dev); |
| |
| return NULL; |
| } |
| 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[] = { |
| { start_auth_opal_session, opal_session }, |
| { get_active_key, &opal_session->opal_key.lr }, |
| { gen_key, }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| ret = opal_get_key(dev, &opal_session->opal_key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, erase_steps, ARRAY_SIZE(erase_steps)); |
| mutex_unlock(&dev->dev_lock); |
| |
| return ret; |
| } |
| |
| static int opal_get_discv(struct opal_dev *dev, struct opal_discovery *discv) |
| { |
| const struct opal_step discovery0_step = { |
| opal_discovery0, discv |
| }; |
| int ret; |
| |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_step(dev, &discovery0_step, 0); |
| mutex_unlock(&dev->dev_lock); |
| if (ret) |
| return ret; |
| return discv->size; /* modified to actual length of data */ |
| } |
| |
| static int opal_revertlsp(struct opal_dev *dev, struct opal_revert_lsp *rev) |
| { |
| /* controller will terminate session */ |
| const struct opal_step steps[] = { |
| { start_admin1LSP_opal_session, &rev->key }, |
| { revert_lsp, rev } |
| }; |
| int ret; |
| |
| ret = opal_get_key(dev, &rev->key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, steps, ARRAY_SIZE(steps)); |
| 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[] = { |
| { start_auth_opal_session, opal_session }, |
| { erase_locking_range, opal_session }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| ret = opal_get_key(dev, &opal_session->opal_key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, erase_steps, ARRAY_SIZE(erase_steps)); |
| 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[] = { |
| { 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, } |
| }; |
| int ret; |
| |
| if (opal_mbr->enable_disable != OPAL_MBR_ENABLE && |
| opal_mbr->enable_disable != OPAL_MBR_DISABLE) |
| return -EINVAL; |
| |
| ret = opal_get_key(dev, &opal_mbr->key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, mbr_steps, ARRAY_SIZE(mbr_steps)); |
| mutex_unlock(&dev->dev_lock); |
| |
| return ret; |
| } |
| |
| static int opal_set_mbr_done(struct opal_dev *dev, |
| struct opal_mbr_done *mbr_done) |
| { |
| u8 mbr_done_tf = mbr_done->done_flag == OPAL_MBR_DONE ? |
| OPAL_TRUE : OPAL_FALSE; |
| |
| const struct opal_step mbr_steps[] = { |
| { start_admin1LSP_opal_session, &mbr_done->key }, |
| { set_mbr_done, &mbr_done_tf }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| if (mbr_done->done_flag != OPAL_MBR_DONE && |
| mbr_done->done_flag != OPAL_MBR_NOT_DONE) |
| return -EINVAL; |
| |
| ret = opal_get_key(dev, &mbr_done->key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, mbr_steps, ARRAY_SIZE(mbr_steps)); |
| mutex_unlock(&dev->dev_lock); |
| |
| return ret; |
| } |
| |
| static int opal_write_shadow_mbr(struct opal_dev *dev, |
| struct opal_shadow_mbr *info) |
| { |
| const struct opal_step mbr_steps[] = { |
| { start_admin1LSP_opal_session, &info->key }, |
| { write_shadow_mbr, info }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| if (info->size == 0) |
| return 0; |
| |
| ret = opal_get_key(dev, &info->key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, mbr_steps, ARRAY_SIZE(mbr_steps)); |
| 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); |
| 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[] = { |
| { start_admin1LSP_opal_session, &lk_unlk->session.opal_key }, |
| { add_user_to_lr, lk_unlk }, |
| { add_user_to_lr_ace, lk_unlk }, |
| { end_opal_session, } |
| }; |
| 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; |
| } |
| |
| ret = opal_get_key(dev, &lk_unlk->session.opal_key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, steps, ARRAY_SIZE(steps)); |
| mutex_unlock(&dev->dev_lock); |
| |
| return ret; |
| } |
| |
| static int opal_reverttper(struct opal_dev *dev, struct opal_key *opal, bool psid) |
| { |
| /* controller will terminate session */ |
| const struct opal_step revert_steps[] = { |
| { start_SIDASP_opal_session, opal }, |
| { revert_tper, } |
| }; |
| const struct opal_step psid_revert_steps[] = { |
| { start_PSID_opal_session, opal }, |
| { revert_tper, } |
| }; |
| |
| int ret; |
| |
| ret = opal_get_key(dev, opal); |
| |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| if (psid) |
| ret = execute_steps(dev, psid_revert_steps, |
| ARRAY_SIZE(psid_revert_steps)); |
| else |
| ret = execute_steps(dev, revert_steps, |
| ARRAY_SIZE(revert_steps)); |
| 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[] = { |
| { start_auth_opal_session, &lk_unlk->session }, |
| { lock_unlock_locking_range, lk_unlk }, |
| { end_opal_session, } |
| }; |
| const struct opal_step unlock_sum_steps[] = { |
| { start_auth_opal_session, &lk_unlk->session }, |
| { lock_unlock_locking_range_sum, lk_unlk }, |
| { end_opal_session, } |
| }; |
| |
| if (lk_unlk->session.sum) |
| return execute_steps(dev, unlock_sum_steps, |
| ARRAY_SIZE(unlock_sum_steps)); |
| else |
| return execute_steps(dev, unlock_steps, |
| ARRAY_SIZE(unlock_steps)); |
| } |
| |
| 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[] = { |
| { start_admin1LSP_opal_session, key }, |
| { set_mbr_done, &mbr_done_tf }, |
| { end_opal_session, } |
| }; |
| |
| return execute_steps(dev, mbrdone_step, ARRAY_SIZE(mbrdone_step)); |
| } |
| |
| static void opal_lock_check_for_saved_key(struct opal_dev *dev, |
| struct opal_lock_unlock *lk_unlk) |
| { |
| struct opal_suspend_data *iter; |
| |
| if (lk_unlk->l_state != OPAL_LK || |
| lk_unlk->session.opal_key.key_len > 0) |
| return; |
| |
| /* |
| * Usually when closing a crypto device (eg: dm-crypt with LUKS) the |
| * volume key is not required, as it requires root privileges anyway, |
| * and root can deny access to a disk in many ways regardless. |
| * Requiring the volume key to lock the device is a peculiarity of the |
| * OPAL specification. Given we might already have saved the key if |
| * the user requested it via the 'IOC_OPAL_SAVE' ioctl, we can use |
| * that key to lock the device if no key was provided here, the |
| * locking range matches and the appropriate flag was passed with |
| * 'IOC_OPAL_SAVE'. |
| * This allows integrating OPAL with tools and libraries that are used |
| * to the common behaviour and do not ask for the volume key when |
| * closing a device. |
| */ |
| setup_opal_dev(dev); |
| list_for_each_entry(iter, &dev->unlk_lst, node) { |
| if ((iter->unlk.flags & OPAL_SAVE_FOR_LOCK) && |
| iter->lr == lk_unlk->session.opal_key.lr && |
| iter->unlk.session.opal_key.key_len > 0) { |
| lk_unlk->session.opal_key.key_len = |
| iter->unlk.session.opal_key.key_len; |
| memcpy(lk_unlk->session.opal_key.key, |
| iter->unlk.session.opal_key.key, |
| iter->unlk.session.opal_key.key_len); |
| break; |
| } |
| } |
| } |
| |
| static int opal_lock_unlock(struct opal_dev *dev, |
| struct opal_lock_unlock *lk_unlk) |
| { |
| int ret; |
| |
| if (lk_unlk->session.who > OPAL_USER9) |
| return -EINVAL; |
| |
| mutex_lock(&dev->dev_lock); |
| opal_lock_check_for_saved_key(dev, lk_unlk); |
| ret = opal_get_key(dev, &lk_unlk->session.opal_key); |
| if (!ret) |
| 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[] = { |
| { start_anybodyASP_opal_session, }, |
| { get_msid_cpin_pin, }, |
| { end_opal_session, }, |
| { start_SIDASP_opal_session, opal }, |
| { set_sid_cpin_pin, opal }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| if (!dev) |
| return -ENODEV; |
| |
| ret = opal_get_key(dev, opal); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, owner_steps, ARRAY_SIZE(owner_steps)); |
| 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[] = { |
| { start_SIDASP_opal_session, &opal_lr_act->key }, |
| { get_lsp_lifecycle, }, |
| { activate_lsp, opal_lr_act }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| if (!opal_lr_act->num_lrs || opal_lr_act->num_lrs > OPAL_MAX_LRS) |
| return -EINVAL; |
| |
| ret = opal_get_key(dev, &opal_lr_act->key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, active_steps, ARRAY_SIZE(active_steps)); |
| 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[] = { |
| { start_auth_opal_session, &opal_lrs->session }, |
| { setup_locking_range, opal_lrs }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| ret = opal_get_key(dev, &opal_lrs->session.opal_key); |
| if (ret) |
| return ret; |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, lr_steps, ARRAY_SIZE(lr_steps)); |
| mutex_unlock(&dev->dev_lock); |
| |
| return ret; |
| } |
| |
| static int opal_locking_range_status(struct opal_dev *dev, |
| struct opal_lr_status *opal_lrst, |
| void __user *data) |
| { |
| const struct opal_step lr_steps[] = { |
| { start_auth_opal_session, &opal_lrst->session }, |
| { locking_range_status, opal_lrst }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, lr_steps, ARRAY_SIZE(lr_steps)); |
| mutex_unlock(&dev->dev_lock); |
| |
| /* skip session info when copying back to uspace */ |
| if (!ret && copy_to_user(data + offsetof(struct opal_lr_status, range_start), |
| (void *)opal_lrst + offsetof(struct opal_lr_status, range_start), |
| sizeof(*opal_lrst) - offsetof(struct opal_lr_status, range_start))) { |
| pr_debug("Error copying status to userspace\n"); |
| return -EFAULT; |
| } |
| |
| return ret; |
| } |
| |
| static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw) |
| { |
| const struct opal_step pw_steps[] = { |
| { start_auth_opal_session, &opal_pw->session }, |
| { set_new_pw, &opal_pw->new_user_pw }, |
| { end_opal_session, } |
| }; |
| int ret; |
| |
| if (opal_pw->session.who > OPAL_USER9 || |
| opal_pw->new_user_pw.who > OPAL_USER9) |
| return -EINVAL; |
| |
| mutex_lock(&dev->dev_lock); |
| setup_opal_dev(dev); |
| ret = execute_steps(dev, pw_steps, ARRAY_SIZE(pw_steps)); |
| mutex_unlock(&dev->dev_lock); |
|