// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */ #define pr_fmt(fmt) "mlxfw_mfa2: " fmt #include #include #include #include #include "mlxfw_mfa2.h" #include "mlxfw_mfa2_file.h" #include "mlxfw_mfa2_tlv.h" #include "mlxfw_mfa2_format.h" #include "mlxfw_mfa2_tlv_multi.h" /* MFA2 FILE * +----------------------------------+ * | MFA2 finger print | * +----------------------------------+ * | package descriptor multi_tlv | * | +------------------------------+ | +-----------------+ * | | package descriptor tlv +-----> |num_devices=n | * | +------------------------------+ | |num_components=m | * +----------------------------------+ |CB offset | * | device descriptor multi_tlv | |... | * | +------------------------------+ | | | * | | PSID tlv | | +-----------------+ * | +------------------------------+ | * | | component index tlv | | * | +------------------------------+ | * +----------------------------------+ * | component descriptor multi_tlv | * | +------------------------------+ | +-----------------+ * | | component descriptor tlv +-----> |Among others: | * | +------------------------------+ | |CB offset=o | * +----------------------------------+ |comp index=i | * | | |... | * | | | | * | | +-----------------+ * | COMPONENT BLOCK (CB) | * | | * | | * | | * +----------------------------------+ * * On the top level, an MFA2 file contains: * - Fingerprint * - Several multi_tlvs (TLVs of type MLXFW_MFA2_TLV_MULTI, as defined in * mlxfw_mfa2_format.h) * - Compresses content block * * The first multi_tlv * ------------------- * The first multi TLV is treated as package descriptor, and expected to have a * first TLV child of type MLXFW_MFA2_TLV_PACKAGE_DESCRIPTOR which contains all * the global information needed to parse the file. Among others, it contains * the number of device descriptors and component descriptor following this * multi TLV. * * The device descriptor multi_tlv * ------------------------------- * The multi TLVs following the package descriptor are treated as device * descriptor, and are expected to have the following children: * - PSID TLV child of type MLXFW_MFA2_TLV_PSID containing that device PSID. * - Component index of type MLXFW_MFA2_TLV_COMPONENT_PTR that contains that * device component index. * * The component descriptor multi_tlv * ---------------------------------- * The multi TLVs following the device descriptor multi TLVs are treated as * component descriptor, and are expected to have a first child of type * MLXFW_MFA2_TLV_COMPONENT_DESCRIPTOR that contains mostly the component index, * needed for the flash process and the offset to the binary within the * component block. */ static const u8 mlxfw_mfa2_fingerprint[] = "MLNX.MFA2.XZ.00!"; static const int mlxfw_mfa2_fingerprint_len = sizeof(mlxfw_mfa2_fingerprint) - 1; static const u8 mlxfw_mfa2_comp_magic[] = "#BIN.COMPONENT!#"; static const int mlxfw_mfa2_comp_magic_len = sizeof(mlxfw_mfa2_comp_magic) - 1; bool mlxfw_mfa2_check(const struct firmware *fw) { if (fw->size < sizeof(mlxfw_mfa2_fingerprint)) return false; return memcmp(fw->data, mlxfw_mfa2_fingerprint, mlxfw_mfa2_fingerprint_len) == 0; } static bool mlxfw_mfa2_tlv_multi_validate(const struct mlxfw_mfa2_file *mfa2_file, const struct mlxfw_mfa2_tlv_multi *multi) { const struct mlxfw_mfa2_tlv *tlv; u16 idx; /* Check that all children are valid */ mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) { if (!tlv) { pr_err("Multi has invalid child"); return false; } } return true; } static bool mlxfw_mfa2_file_dev_validate(const struct mlxfw_mfa2_file *mfa2_file, const struct mlxfw_mfa2_tlv *dev_tlv, u16 dev_idx) { const struct mlxfw_mfa2_tlv_component_ptr *cptr; const struct mlxfw_mfa2_tlv_multi *multi; const struct mlxfw_mfa2_tlv_psid *psid; const struct mlxfw_mfa2_tlv *tlv; u16 cptr_count; u16 cptr_idx; int err; pr_debug("Device %d\n", dev_idx); multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, dev_tlv); if (!multi) { pr_err("Device %d is not a valid TLV error\n", dev_idx); return false; } if (!mlxfw_mfa2_tlv_multi_validate(mfa2_file, multi)) return false; /* Validate the device has PSID tlv */ tlv = mlxfw_mfa2_tlv_multi_child_find(mfa2_file, multi, MLXFW_MFA2_TLV_PSID, 0); if (!tlv) { pr_err("Device %d does not have PSID\n", dev_idx); return false; } psid = mlxfw_mfa2_tlv_psid_get(mfa2_file, tlv); if (!psid) { pr_err("Device %d PSID TLV is not valid\n", dev_idx); return false; } print_hex_dump_debug(" -- Device PSID ", DUMP_PREFIX_NONE, 16, 16, psid->psid, be16_to_cpu(tlv->len), true); /* Validate the device has COMPONENT_PTR */ err = mlxfw_mfa2_tlv_multi_child_count(mfa2_file, multi, MLXFW_MFA2_TLV_COMPONENT_PTR, &cptr_count); if (err) return false; if (cptr_count == 0) { pr_err("Device %d has no components\n", dev_idx); return false; } for (cptr_idx = 0; cptr_idx < cptr_count; cptr_idx++) { tlv = mlxfw_mfa2_tlv_multi_child_find(mfa2_file, multi, MLXFW_MFA2_TLV_COMPONENT_PTR, cptr_idx); if (!tlv) return false; cptr = mlxfw_mfa2_tlv_component_ptr_get(mfa2_file, tlv); if (!cptr) { pr_err("Device %d COMPONENT_PTR TLV is not valid\n", dev_idx); return false; } pr_debug(" -- Component index %d\n", be16_to_cpu(cptr->component_index)); } return true; } static bool mlxfw_mfa2_file_comp_validate(const struct mlxfw_mfa2_file *mfa2_file, const struct mlxfw_mfa2_tlv *comp_tlv, u16 comp_idx) { const struct mlxfw_mfa2_tlv_component_descriptor *cdesc; const struct mlxfw_mfa2_tlv_multi *multi; const struct mlxfw_mfa2_tlv *tlv; pr_debug("Component %d\n", comp_idx); multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, comp_tlv); if (!multi) { pr_err("Component %d is not a valid TLV error\n", comp_idx); return false; } if (!mlxfw_mfa2_tlv_multi_validate(mfa2_file, multi)) return false; /* Check that component have COMPONENT_DESCRIPTOR as first child */ tlv = mlxfw_mfa2_tlv_multi_child(mfa2_file, multi); if (!tlv) { pr_err("Component descriptor %d multi TLV error\n", comp_idx); return false; } cdesc = mlxfw_mfa2_tlv_component_descriptor_get(mfa2_file, tlv); if (!cdesc) { pr_err("Component %d does not have a valid descriptor\n", comp_idx); return false; } pr_debug(" -- Component type %d\n", be16_to_cpu(cdesc->identifier)); pr_debug(" -- Offset 0x%llx and size %d\n", ((u64) be32_to_cpu(cdesc->cb_offset_h) << 32) | be32_to_cpu(cdesc->cb_offset_l), be32_to_cpu(cdesc->size)); return true; } static bool mlxfw_mfa2_file_validate(const struct mlxfw_mfa2_file *mfa2_file) { const struct mlxfw_mfa2_tlv *tlv; u16 idx; pr_debug("Validating file\n"); /* check that all the devices exist */ mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, mfa2_file->first_dev, mfa2_file->dev_count) { if (!tlv) { pr_err("Device TLV error\n"); return false; } /* Check each device */ if (!mlxfw_mfa2_file_dev_validate(mfa2_file, tlv, idx)) return false; } /* check that all the components exist */ mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, mfa2_file->first_component, mfa2_file->component_count) { if (!tlv) { pr_err("Device TLV error\n"); return false; } /* Check each component */ if (!mlxfw_mfa2_file_comp_validate(mfa2_file, tlv, idx)) return false; } return true; } struct mlxfw_mfa2_file *mlxfw_mfa2_file_init(const struct firmware *fw) { const struct mlxfw_mfa2_tlv_package_descriptor *pd; const struct mlxfw_mfa2_tlv_multi *multi; const struct mlxfw_mfa2_tlv *multi_child; const struct mlxfw_mfa2_tlv *first_tlv; struct mlxfw_mfa2_file *mfa2_file; const void *first_tlv_ptr; const void *cb_top_ptr; mfa2_file = kcalloc(1, sizeof(*mfa2_file), GFP_KERNEL); if (!mfa2_file) return ERR_PTR(-ENOMEM); mfa2_file->fw = fw; first_tlv_ptr = fw->data + NLA_ALIGN(mlxfw_mfa2_fingerprint_len); first_tlv = mlxfw_mfa2_tlv_get(mfa2_file, first_tlv_ptr); if (!first_tlv) { pr_err("Could not parse package descriptor TLV\n"); goto err_out; } multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, first_tlv); if (!multi) { pr_err("First TLV is not of valid multi type\n"); goto err_out; } multi_child = mlxfw_mfa2_tlv_multi_child(mfa2_file, multi); if (!multi_child) goto err_out; pd = mlxfw_mfa2_tlv_package_descriptor_get(mfa2_file, multi_child); if (!pd) { pr_err("Could not parse package descriptor TLV\n"); goto err_out; } mfa2_file->first_dev = mlxfw_mfa2_tlv_next(mfa2_file, first_tlv); if (!mfa2_file->first_dev) { pr_err("First device TLV is not valid\n"); goto err_out; } mfa2_file->dev_count = be16_to_cpu(pd->num_devices); mfa2_file->first_component = mlxfw_mfa2_tlv_advance(mfa2_file, mfa2_file->first_dev, mfa2_file->dev_count); mfa2_file->component_count = be16_to_cpu(pd->num_components); mfa2_file->cb = fw->data + NLA_ALIGN(be32_to_cpu(pd->cb_offset)); if (!mlxfw_mfa2_valid_ptr(mfa2_file, mfa2_file->cb)) { pr_err("Component block is out side the file\n"); goto err_out; } mfa2_file->cb_archive_size = be32_to_cpu(pd->cb_archive_size); cb_top_ptr = mfa2_file->cb + mfa2_file->cb_archive_size - 1; if (!mlxfw_mfa2_valid_ptr(mfa2_file, cb_top_ptr)) { pr_err("Component block size is too big\n"); goto err_out; } if (!mlxfw_mfa2_file_validate(mfa2_file)) goto err_out; return mfa2_file; err_out: kfree(mfa2_file); return ERR_PTR(-EINVAL); } static const struct mlxfw_mfa2_tlv_multi * mlxfw_mfa2_tlv_dev_get(const struct mlxfw_mfa2_file *mfa2_file, const char *psid, u16 psid_size) { const struct mlxfw_mfa2_tlv_psid *tlv_psid; const struct mlxfw_mfa2_tlv_multi *dev_multi; const struct mlxfw_mfa2_tlv *dev_tlv; const struct mlxfw_mfa2_tlv *tlv; u32 idx; /* for each device tlv */ mlxfw_mfa2_tlv_foreach(mfa2_file, dev_tlv, idx, mfa2_file->first_dev, mfa2_file->dev_count) { if (!dev_tlv) return NULL; dev_multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, dev_tlv); if (!dev_multi) return NULL; /* find psid child and compare */ tlv = mlxfw_mfa2_tlv_multi_child_find(mfa2_file, dev_multi, MLXFW_MFA2_TLV_PSID, 0); if (!tlv) return NULL; if (be16_to_cpu(tlv->len) != psid_size) continue; tlv_psid = mlxfw_mfa2_tlv_psid_get(mfa2_file, tlv); if (!tlv_psid) return NULL; if (memcmp(psid, tlv_psid->psid, psid_size) == 0) return dev_multi; } return NULL; } int mlxfw_mfa2_file_component_count(const struct mlxfw_mfa2_file *mfa2_file, const char *psid, u32 psid_size, u32 *p_count) { const struct mlxfw_mfa2_tlv_multi *dev_multi; u16 count; int err; dev_multi = mlxfw_mfa2_tlv_dev_get(mfa2_file, psid, psid_size); if (!dev_multi) return -EINVAL; err = mlxfw_mfa2_tlv_multi_child_count(mfa2_file, dev_multi, MLXFW_MFA2_TLV_COMPONENT_PTR, &count); if (err) return err; *p_count = count; return 0; } static int mlxfw_mfa2_xz_dec_run(struct xz_dec *xz_dec, struct xz_buf *xz_buf, bool *finished) { enum xz_ret xz_ret; xz_ret = xz_dec_run(xz_dec, xz_buf); switch (xz_ret) { case XZ_STREAM_END: *finished = true; return 0; case XZ_OK: *finished = false; return 0; case XZ_MEM_ERROR: pr_err("xz no memory\n"); return -ENOMEM; case XZ_DATA_ERROR: pr_err("xz file corrupted\n"); return -EINVAL; case XZ_FORMAT_ERROR: pr_err("xz format not found\n"); return -EINVAL; case XZ_OPTIONS_ERROR: pr_err("unsupported xz option\n"); return -EINVAL; case XZ_MEMLIMIT_ERROR: pr_err("xz dictionary too small\n"); return -EINVAL; default: pr_err("xz error %d\n", xz_ret); return -EINVAL; } } static int mlxfw_mfa2_file_cb_offset_xz(const struct mlxfw_mfa2_file *mfa2_file, off_t off, size_t size, u8 *buf) { struct xz_dec *xz_dec; struct xz_buf dec_buf; off_t curr_off = 0; bool finished; int err; xz_dec = xz_dec_init(XZ_DYNALLOC, (u32) -1); if (!xz_dec) return -EINVAL; dec_buf.in_size = mfa2_file->cb_archive_size; dec_buf.in = mfa2_file->cb; dec_buf.in_pos = 0; dec_buf.out = buf; /* decode up to the offset */ do { dec_buf.out_pos = 0; dec_buf.out_size = min_t(size_t, size, off - curr_off); if (dec_buf.out_size == 0) break; err = mlxfw_mfa2_xz_dec_run(xz_dec, &dec_buf, &finished); if (err) goto out; if (finished) { pr_err("xz section too short\n"); err = -EINVAL; goto out; } curr_off += dec_buf.out_pos; } while (curr_off != off); /* decode the needed section */ dec_buf.out_pos = 0; dec_buf.out_size = size; err = mlxfw_mfa2_xz_dec_run(xz_dec, &dec_buf, &finished); out: xz_dec_end(xz_dec); return err; } static const struct mlxfw_mfa2_tlv_component_descriptor * mlxfw_mfa2_file_component_tlv_get(const struct mlxfw_mfa2_file *mfa2_file, u16 comp_index) { const struct mlxfw_mfa2_tlv_multi *multi; const struct mlxfw_mfa2_tlv *multi_child; const struct mlxfw_mfa2_tlv *comp_tlv; if (comp_index > mfa2_file->component_count) return NULL; comp_tlv = mlxfw_mfa2_tlv_advance(mfa2_file, mfa2_file->first_component, comp_index); if (!comp_tlv) return NULL; multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, comp_tlv); if (!multi) return NULL; multi_child = mlxfw_mfa2_tlv_multi_child(mfa2_file, multi); if (!multi_child) return NULL; return mlxfw_mfa2_tlv_component_descriptor_get(mfa2_file, multi_child); } struct mlxfw_mfa2_comp_data { struct mlxfw_mfa2_component comp; u8 buff[0]; }; static const struct mlxfw_mfa2_tlv_component_descriptor * mlxfw_mfa2_file_component_find(const struct mlxfw_mfa2_file *mfa2_file, const char *psid, int psid_size, int component_index) { const struct mlxfw_mfa2_tlv_component_ptr *cptr; const struct mlxfw_mfa2_tlv_multi *dev_multi; const struct mlxfw_mfa2_tlv *cptr_tlv; u16 comp_idx; dev_multi = mlxfw_mfa2_tlv_dev_get(mfa2_file, psid, psid_size); if (!dev_multi) return NULL; cptr_tlv = mlxfw_mfa2_tlv_multi_child_find(mfa2_file, dev_multi, MLXFW_MFA2_TLV_COMPONENT_PTR, component_index); if (!cptr_tlv) return NULL; cptr = mlxfw_mfa2_tlv_component_ptr_get(mfa2_file, cptr_tlv); if (!cptr) return NULL; comp_idx = be16_to_cpu(cptr->component_index); return mlxfw_mfa2_file_component_tlv_get(mfa2_file, comp_idx); } struct mlxfw_mfa2_component * mlxfw_mfa2_file_component_get(const struct mlxfw_mfa2_file *mfa2_file, const char *psid, int psid_size, int component_index) { const struct mlxfw_mfa2_tlv_component_descriptor *comp; struct mlxfw_mfa2_comp_data *comp_data; u32 comp_buf_size; off_t cb_offset; u32 comp_size; int err; comp = mlxfw_mfa2_file_component_find(mfa2_file, psid, psid_size, component_index); if (!comp) return ERR_PTR(-EINVAL); cb_offset = (u64) be32_to_cpu(comp->cb_offset_h) << 32 | be32_to_cpu(comp->cb_offset_l); comp_size = be32_to_cpu(comp->size); comp_buf_size = comp_size + mlxfw_mfa2_comp_magic_len; comp_data = kmalloc(sizeof(*comp_data) + comp_buf_size, GFP_KERNEL); if (!comp_data) return ERR_PTR(-ENOMEM); comp_data->comp.data_size = comp_size; comp_data->comp.index = be16_to_cpu(comp->identifier); err = mlxfw_mfa2_file_cb_offset_xz(mfa2_file, cb_offset, comp_buf_size, comp_data->buff); if (err) { pr_err("Component could not be reached in CB\n"); goto err_out; } if (memcmp(comp_data->buff, mlxfw_mfa2_comp_magic, mlxfw_mfa2_comp_magic_len) != 0) { pr_err("Component has wrong magic\n"); err = -EINVAL; goto err_out; } comp_data->comp.data = comp_data->buff + mlxfw_mfa2_comp_magic_len; return &comp_data->comp; err_out: kfree(comp_data); return ERR_PTR(err); } void mlxfw_mfa2_file_component_put(struct mlxfw_mfa2_component *comp) { const struct mlxfw_mfa2_comp_data *comp_data; comp_data = container_of(comp, struct mlxfw_mfa2_comp_data, comp); kfree(comp_data); } void mlxfw_mfa2_file_fini(struct mlxfw_mfa2_file *mfa2_file) { kfree(mfa2_file); }