From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [RFC] Bluetooth: btintel: Check firmware version before download
Date: Mon, 1 Feb 2021 14:06:26 -0800 [thread overview]
Message-ID: <20210201220626.890923-1-luiz.dentz@gmail.com> (raw)
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This checking the firmware build number, week and years matches and then
skip the download process.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
drivers/bluetooth/btintel.c | 88 ++++++++++++++++++++++++++++---------
drivers/bluetooth/btintel.h | 5 ++-
drivers/bluetooth/btusb.c | 22 +++++-----
3 files changed, 83 insertions(+), 32 deletions(-)
diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 88ce5f0ffc4b..bf7b910966c8 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;
@@ -854,20 +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 + 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
@@ -896,28 +890,84 @@ 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;
+ u32 frag_len;
+
+ fw_ptr = fw->data;
+ frag_len = 0;
+
+ 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) == CMD_WRITE_BOOT_PARAMS) {
+ struct cmd_write_boot_params *params;
+
+ params = (void *)(fw_ptr + sizeof(*cmd));
+
+ bt_dev_dbg(hdev, "Boot Address: 0x%x\n"
+ "Firmware Version: %u-%u.%u",
+ le32_to_cpu(params->boot_addr),
+ params->fw_build_num, params->fw_build_ww,
+ params->fw_build_yy);
+
+ if (num == params->fw_build_num &&
+ ww == params->fw_build_ww &&
+ yy == params->fw_build_yy)
+ return true;
+ else
+ return false;
+ }
+
+ frag_len += 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;
+ /* 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))
+ 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))
+ 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.
@@ -947,7 +997,7 @@ 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) {
@@ -968,7 +1018,6 @@ 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;
@@ -978,7 +1027,6 @@ 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 4266c057746e..a06e86f52da3 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2612,14 +2612,15 @@ 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) {
- /* When FW download fails, send Intel Reset to retry
- * FW download.
- */
- btintel_reset_to_bootloader(hdev);
+ if (err != -EALREADY)
+ /* When FW download fails, send Intel Reset to retry
+ * FW download.
+ */
+ btintel_reset_to_bootloader(hdev);
goto done;
}
set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
@@ -2806,12 +2807,13 @@ 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) {
- /* When FW download fails, send Intel Reset to retry
- * FW download.
- */
- btintel_reset_to_bootloader(hdev);
+ if (err != -EALREADY)
+ /* When FW download fails, send Intel Reset to retry
+ * FW download.
+ */
+ btintel_reset_to_bootloader(hdev);
goto done;
}
set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
--
2.26.2
next reply other threads:[~2021-02-01 22:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 22:06 Luiz Augusto von Dentz [this message]
2021-02-01 22:13 ` [RFC] Bluetooth: btintel: Check firmware version before download Luiz Augusto von Dentz
2021-02-01 23:19 ` bluez.test.bot
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