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[71.56.157.77]) by smtp.gmail.com with ESMTPSA id b10sm16132325pgm.76.2021.03.23.11.59.05 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Mar 2021 11:59:05 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH v10 1/9] Bluetooth: btintel: Check firmware version before download Date: Tue, 23 Mar 2021 11:58:56 -0700 Message-Id: <20210323185904.3372987-1-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Luiz Augusto von Dentz This checks the firmware build number, week and year against the repective loaded version. If details are a match, skip the download process. Signed-off-by: Luiz Augusto von Dentz --- v2: Add patch that mover checks for operational mode after the version checking. v3: Fix not checking for operation mode before using btintel_read_boot_params since some models depend on that to contruct the fw filename. Also attempt to cleanup duplicated code. v4: Fix forwarding -EALREADY when firmware has already been loaded. v5: Fix not advancing fw_ptr. v6: Fix btusb_setup_intel_new_get_fw_name error checking for ddc. v7: Disable version checking for WsP/SfP. v8: Really disables version checking for WsP/SfP. v9: Reintroduce bootloader checks and add workaround for version checking when operation and version cannot be read. v10: Fix build error when BT_CONFIG_INTEL is not set. drivers/bluetooth/btintel.c | 106 +++++++++++++++++++++++++++------- drivers/bluetooth/btintel.h | 5 +- drivers/bluetooth/btusb.c | 18 +++++- drivers/bluetooth/hci_intel.c | 7 ++- 4 files changed, 109 insertions(+), 27 deletions(-) diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c index fa97324454ea..3ff698a0bd25 100644 --- a/drivers/bluetooth/btintel.c +++ b/drivers/bluetooth/btintel.c @@ -24,6 +24,14 @@ #define ECDSA_OFFSET 644 #define ECDSA_HEADER_LEN 320 +#define CMD_WRITE_BOOT_PARAMS 0xfc0e +struct cmd_write_boot_params { + u32 boot_addr; + u8 fw_build_num; + u8 fw_build_ww; + u8 fw_build_yy; +} __packed; + int btintel_check_bdaddr(struct hci_dev *hdev) { struct hci_rp_read_bd_addr *bda; @@ -841,7 +849,7 @@ static int btintel_sfi_ecdsa_header_secure_send(struct hci_dev *hdev, static int btintel_download_firmware_payload(struct hci_dev *hdev, const struct firmware *fw, - u32 *boot_param, size_t offset) + size_t offset) { int err; const u8 *fw_ptr; @@ -854,21 +862,6 @@ static int btintel_download_firmware_payload(struct hci_dev *hdev, while (fw_ptr - fw->data < fw->size) { struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len); - /* Each SKU has a different reset parameter to use in the - * HCI_Intel_Reset command and it is embedded in the firmware - * data. So, instead of using static value per SKU, check - * the firmware data and save it for later use. - */ - if (le16_to_cpu(cmd->opcode) == 0xfc0e) { - /* The boot parameter is the first 32-bit value - * and rest of 3 octets are reserved. - */ - *boot_param = get_unaligned_le32(fw_ptr + frag_len + - sizeof(*cmd)); - - bt_dev_dbg(hdev, "boot_param=0x%x", *boot_param); - } - frag_len += sizeof(*cmd) + cmd->plen; /* The parameter length of the secure send command requires @@ -897,28 +890,101 @@ static int btintel_download_firmware_payload(struct hci_dev *hdev, return err; } +static bool btintel_firmware_version(struct hci_dev *hdev, + u8 num, u8 ww, u8 yy, + const struct firmware *fw, + u32 *boot_addr) +{ + const u8 *fw_ptr; + + fw_ptr = fw->data; + + while (fw_ptr - fw->data < fw->size) { + struct hci_command_hdr *cmd = (void *)(fw_ptr); + + /* Each SKU has a different reset parameter to use in the + * HCI_Intel_Reset command and it is embedded in the firmware + * data. So, instead of using static value per SKU, check + * the firmware data and save it for later use. + */ + if (le16_to_cpu(cmd->opcode) == CMD_WRITE_BOOT_PARAMS) { + struct cmd_write_boot_params *params; + + params = (void *)(fw_ptr + sizeof(*cmd)); + + bt_dev_info(hdev, "Boot Address: 0x%x", + le32_to_cpu(params->boot_addr)); + + bt_dev_info(hdev, "Firmware Version: %u-%u.%u", + params->fw_build_num, params->fw_build_ww, + params->fw_build_yy); + + return (num == params->fw_build_num && + ww == params->fw_build_ww && + yy == params->fw_build_yy); + } + + fw_ptr += sizeof(*cmd) + cmd->plen; + } + + return false; +} + int btintel_download_firmware(struct hci_dev *hdev, + struct intel_version *ver, const struct firmware *fw, u32 *boot_param) { int err; + /* SfP and WsP don't seem to update the firmware version on file + * so version checking is currently not possible. + */ + switch (ver->hw_variant) { + case 0x0b: /* SfP */ + case 0x0c: /* WsP */ + /* Skip version checking */ + break; + default: + /* Skip download if firmware has the same version */ + if (btintel_firmware_version(hdev, ver->fw_build_num, + ver->fw_build_ww, ver->fw_build_yy, + fw, boot_param)) { + bt_dev_info(hdev, "Firmware already loaded"); + /* Return -EALREADY to indicate that the firmware has + * already been loaded. + */ + return -EALREADY; + } + } + err = btintel_sfi_rsa_header_secure_send(hdev, fw); if (err) return err; - return btintel_download_firmware_payload(hdev, fw, boot_param, - RSA_HEADER_LEN); + return btintel_download_firmware_payload(hdev, fw, RSA_HEADER_LEN); } EXPORT_SYMBOL_GPL(btintel_download_firmware); int btintel_download_firmware_newgen(struct hci_dev *hdev, + struct intel_version_tlv *ver, const struct firmware *fw, u32 *boot_param, u8 hw_variant, u8 sbe_type) { int err; u32 css_header_ver; + /* Skip download if firmware has the same version */ + if (btintel_firmware_version(hdev, ver->min_fw_build_nn, + ver->min_fw_build_cw, ver->min_fw_build_yy, + fw, boot_param)) { + bt_dev_info(hdev, "Firmware already loaded"); + /* Return -EALREADY to indicate that firmware has already been + * loaded. + */ + return -EALREADY; + } + /* iBT hardware variants 0x0b, 0x0c, 0x11, 0x12, 0x13, 0x14 support * only RSA secure boot engine. Hence, the corresponding sfi file will * have RSA header of 644 bytes followed by Command Buffer. @@ -948,7 +1014,7 @@ int btintel_download_firmware_newgen(struct hci_dev *hdev, if (err) return err; - err = btintel_download_firmware_payload(hdev, fw, boot_param, RSA_HEADER_LEN); + err = btintel_download_firmware_payload(hdev, fw, RSA_HEADER_LEN); if (err) return err; } else if (hw_variant >= 0x17) { @@ -969,7 +1035,6 @@ int btintel_download_firmware_newgen(struct hci_dev *hdev, return err; err = btintel_download_firmware_payload(hdev, fw, - boot_param, RSA_HEADER_LEN + ECDSA_HEADER_LEN); if (err) return err; @@ -979,7 +1044,6 @@ int btintel_download_firmware_newgen(struct hci_dev *hdev, return err; err = btintel_download_firmware_payload(hdev, fw, - boot_param, RSA_HEADER_LEN + ECDSA_HEADER_LEN); if (err) return err; diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h index 6511b091caf5..51f1f2c883b4 100644 --- a/drivers/bluetooth/btintel.h +++ b/drivers/bluetooth/btintel.h @@ -163,9 +163,10 @@ struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read, int btintel_send_intel_reset(struct hci_dev *hdev, u32 boot_param); int btintel_read_boot_params(struct hci_dev *hdev, struct intel_boot_params *params); -int btintel_download_firmware(struct hci_dev *dev, const struct firmware *fw, - u32 *boot_param); +int btintel_download_firmware(struct hci_dev *dev, struct intel_version *ver, + const struct firmware *fw, u32 *boot_param); int btintel_download_firmware_newgen(struct hci_dev *hdev, + struct intel_version_tlv *ver, const struct firmware *fw, u32 *boot_param, u8 hw_variant, u8 sbe_type); diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 0d355bb45e08..de220ab7f231 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2557,10 +2557,17 @@ static int btusb_intel_download_firmware_newgen(struct hci_dev *hdev, set_bit(BTUSB_DOWNLOADING, &data->flags); /* Start firmware downloading and get boot parameter */ - err = btintel_download_firmware_newgen(hdev, fw, boot_param, + err = btintel_download_firmware_newgen(hdev, ver, fw, boot_param, INTEL_HW_VARIANT(ver->cnvi_bt), ver->sbe_type); if (err < 0) { + if (err == -EALREADY) { + /* Firmware has already been loaded */ + set_bit(BTUSB_FIRMWARE_LOADED, &data->flags); + err = 0; + goto done; + } + /* When FW download fails, send Intel Reset to retry * FW download. */ @@ -2752,8 +2759,15 @@ static int btusb_intel_download_firmware(struct hci_dev *hdev, set_bit(BTUSB_DOWNLOADING, &data->flags); /* Start firmware downloading and get boot parameter */ - err = btintel_download_firmware(hdev, fw, boot_param); + err = btintel_download_firmware(hdev, ver, fw, boot_param); if (err < 0) { + if (err == -EALREADY) { + /* Firmware has already been loaded */ + set_bit(BTUSB_FIRMWARE_LOADED, &data->flags); + err = 0; + goto done; + } + /* When FW download fails, send Intel Reset to retry * FW download. */ diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c index b20a40fab83e..7249b91d9b91 100644 --- a/drivers/bluetooth/hci_intel.c +++ b/drivers/bluetooth/hci_intel.c @@ -735,7 +735,7 @@ static int intel_setup(struct hci_uart *hu) set_bit(STATE_DOWNLOADING, &intel->flags); /* Start firmware downloading and get boot parameter */ - err = btintel_download_firmware(hdev, fw, &boot_param); + err = btintel_download_firmware(hdev, &ver, fw, &boot_param); if (err < 0) goto done; @@ -784,7 +784,10 @@ static int intel_setup(struct hci_uart *hu) done: release_firmware(fw); - if (err < 0) + /* Check if there was an error and if is not -EALREADY which means the + * firmware has already been loaded. + */ + if (err < 0 && err != -EALREADY) return err; /* We need to restore the default speed before Intel reset */