From: Jassi Brar jaswinder.singh@linaro.org

Use cached values and avoid parsing and scanning through partitions everytime for meta-data partitions because they can't change after bootup.

Acked-by: Etienne Carriere etienne.carriere@linaro.org Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org Signed-off-by: Jassi Brar jaswinder.singh@linaro.org --- drivers/fwu-mdata/gpt_blk.c | 43 +++++++++++++++++++++---------------- 1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/fwu-mdata/gpt_blk.c b/drivers/fwu-mdata/gpt_blk.c index d35ce49c5c..28f5d23e1e 100644 --- a/drivers/fwu-mdata/gpt_blk.c +++ b/drivers/fwu-mdata/gpt_blk.c @@ -24,8 +24,9 @@ enum { MDATA_WRITE, };

-static int gpt_get_mdata_partitions(struct blk_desc *desc, - uint mdata_parts[2]) +static uint g_mdata_part[2]; /* = {0, 0} to check against uninit parts */ + +static int gpt_get_mdata_partitions(struct blk_desc *desc) { int i, ret; u32 nparts; @@ -33,18 +34,19 @@ static int gpt_get_mdata_partitions(struct blk_desc *desc, struct disk_partition info; const efi_guid_t fwu_mdata_guid = FWU_MDATA_GUID;

+ /* if primary and secondary partitions already found */ + if (g_mdata_part[0] && g_mdata_part[1]) + return 0; + nparts = 0; - for (i = 1; i < MAX_SEARCH_PARTITIONS; i++) { + for (i = 1; i < MAX_SEARCH_PARTITIONS && nparts < 2; i++) { if (part_get_info(desc, i, &info)) continue; uuid_str_to_bin(info.type_guid, part_type_guid.b, UUID_STR_FORMAT_GUID);

- if (!guidcmp(&fwu_mdata_guid, &part_type_guid)) { - if (nparts < 2) - mdata_parts[nparts] = i; - ++nparts; - } + if (!guidcmp(&fwu_mdata_guid, &part_type_guid)) + g_mdata_part[nparts++] = i; }

if (nparts != 2) { @@ -127,26 +129,25 @@ static int fwu_gpt_update_mdata(struct udevice *dev, struct fwu_mdata *mdata) { int ret; struct blk_desc *desc; - uint mdata_parts[2]; struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev);

desc = dev_get_uclass_plat(priv->blk_dev);

- ret = gpt_get_mdata_partitions(desc, mdata_parts); + ret = gpt_get_mdata_partitions(desc); if (ret < 0) { log_debug("Error getting the FWU metadata partitions\n"); return -ENOENT; }

/* First write the primary partition */ - ret = gpt_read_write_mdata(desc, mdata, MDATA_WRITE, mdata_parts[0]); + ret = gpt_read_write_mdata(desc, mdata, MDATA_WRITE, g_mdata_part[0]); if (ret < 0) { log_debug("Updating primary FWU metadata partition failed\n"); return ret; }

/* And now the replica */ - ret = gpt_read_write_mdata(desc, mdata, MDATA_WRITE, mdata_parts[1]); + ret = gpt_read_write_mdata(desc, mdata, MDATA_WRITE, g_mdata_part[1]); if (ret < 0) { log_debug("Updating secondary FWU metadata partition failed\n"); return ret; @@ -158,16 +159,14 @@ static int fwu_gpt_update_mdata(struct udevice *dev, struct fwu_mdata *mdata) static int gpt_get_mdata(struct blk_desc *desc, struct fwu_mdata *mdata) { int ret; - uint mdata_parts[2]; - - ret = gpt_get_mdata_partitions(desc, mdata_parts);

+ ret = gpt_get_mdata_partitions(desc); if (ret < 0) { log_debug("Error getting the FWU metadata partitions\n"); return -ENOENT; }

- ret = gpt_read_write_mdata(desc, mdata, MDATA_READ, mdata_parts[0]); + ret = gpt_read_write_mdata(desc, mdata, MDATA_READ, g_mdata_part[0]); if (ret < 0) { log_debug("Failed to read the FWU metadata from the device\n"); return -EIO; @@ -182,7 +181,7 @@ static int gpt_get_mdata(struct blk_desc *desc, struct fwu_mdata *mdata) * Try to read the replica. */ memset(mdata, '\0', sizeof(struct fwu_mdata)); - ret = gpt_read_write_mdata(desc, mdata, MDATA_READ, mdata_parts[1]); + ret = gpt_read_write_mdata(desc, mdata, MDATA_READ, g_mdata_part[1]); if (ret < 0) { log_debug("Failed to read the FWU metadata from the device\n"); return -EIO; @@ -206,9 +205,15 @@ static int fwu_gpt_get_mdata(struct udevice *dev, struct fwu_mdata *mdata) static int fwu_gpt_get_mdata_partitions(struct udevice *dev, uint *mdata_parts) { struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); + int err; + + err = gpt_get_mdata_partitions(dev_get_uclass_plat(priv->blk_dev)); + if (!err) { + mdata_parts[0] = g_mdata_part[0]; + mdata_parts[1] = g_mdata_part[1]; + }

- return gpt_get_mdata_partitions(dev_get_uclass_plat(priv->blk_dev), - mdata_parts); + return err; }

static int fwu_gpt_read_mdata_partition(struct udevice *dev,

From: Jassi Brar jaswinder.singh@linaro.org

Moving towards using common code for meta-data management, implement the read/write mdata hooks.

Signed-off-by: Jassi Brar jaswinder.singh@linaro.org Reviewed-by: Etienne Carriere etienne.carriere@linaro.org Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org --- drivers/fwu-mdata/gpt_blk.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)

diff --git a/drivers/fwu-mdata/gpt_blk.c b/drivers/fwu-mdata/gpt_blk.c index 28f5d23e1e..bdaa10cd1d 100644 --- a/drivers/fwu-mdata/gpt_blk.c +++ b/drivers/fwu-mdata/gpt_blk.c @@ -272,7 +272,43 @@ static int fwu_mdata_gpt_blk_probe(struct udevice *dev) return 0; }

+static int fwu_gpt_read_mdata(struct udevice *dev, struct fwu_mdata *mdata, + bool primary) +{ + struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); + struct blk_desc *desc = dev_get_uclass_plat(priv->blk_dev); + int ret; + + ret = gpt_get_mdata_partitions(desc); + if (ret < 0) { + log_debug("Error getting the FWU metadata partitions\n"); + return -ENOENT; + } + + return gpt_read_write_mdata(desc, mdata, MDATA_READ, + primary ? g_mdata_part[0] : g_mdata_part[1]); +} + +static int fwu_gpt_write_mdata(struct udevice *dev, struct fwu_mdata *mdata, + bool primary) +{ + struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); + struct blk_desc *desc = dev_get_uclass_plat(priv->blk_dev); + int ret; + + ret = gpt_get_mdata_partitions(desc); + if (ret < 0) { + log_debug("Error getting the FWU metadata partitions\n"); + return -ENOENT; + } + + return gpt_read_write_mdata(desc, mdata, MDATA_WRITE, + primary ? g_mdata_part[0] : g_mdata_part[1]); +} + static const struct fwu_mdata_ops fwu_gpt_blk_ops = { + .read_mdata = fwu_gpt_read_mdata, + .write_mdata = fwu_gpt_write_mdata, .get_mdata = fwu_gpt_get_mdata, .update_mdata = fwu_gpt_update_mdata, .get_mdata_part_num = fwu_gpt_get_mdata_partitions,

From: Jassi Brar jaswinder.singh@linaro.org

The common code can now read, verify and fix meta-data copies while exposing one consistent structure to users. Only the .read_mdata() and .write_mdata() callbacks of fwu_mdata_ops are needed. Get rid of .get_mdata() .update_mdata() .get_mdata_part_num() .read_mdata_partition() and .write_mdata_partition() and also the corresponding wrapper functions.

Signed-off-by: Jassi Brar jaswinder.singh@linaro.org Reviewed-by: Etienne Carriere etienne.carriere@linaro.org --- cmd/fwu_mdata.c | 17 +- drivers/fwu-mdata/fwu-mdata-uclass.c | 165 ------------------- drivers/fwu-mdata/gpt_blk.c | 124 +------------- include/fwu.h | 199 ----------------------- lib/fwu_updates/fwu.c | 235 ++++----------------------- 5 files changed, 38 insertions(+), 702 deletions(-)

diff --git a/cmd/fwu_mdata.c b/cmd/fwu_mdata.c index f04af27de6..9b70340368 100644 --- a/cmd/fwu_mdata.c +++ b/cmd/fwu_mdata.c @@ -43,23 +43,10 @@ static void print_mdata(struct fwu_mdata *mdata) int do_fwu_mdata_read(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) { - struct udevice *dev; int ret = CMD_RET_SUCCESS, res; - struct fwu_mdata mdata = { 0 }; + struct fwu_mdata mdata;

- if (uclass_get_device(UCLASS_FWU_MDATA, 0, &dev) || !dev) { - log_err("Unable to get FWU metadata device\n"); - return CMD_RET_FAILURE; - } - - res = fwu_check_mdata_validity(); - if (res < 0) { - log_err("FWU Metadata check failed\n"); - ret = CMD_RET_FAILURE; - goto out; - } - - res = fwu_get_mdata(dev, &mdata); + res = fwu_get_verified_mdata(&mdata); if (res < 0) { log_err("Unable to get valid FWU metadata\n"); ret = CMD_RET_FAILURE; diff --git a/drivers/fwu-mdata/fwu-mdata-uclass.c b/drivers/fwu-mdata/fwu-mdata-uclass.c index e03773c584..0a8edaaa41 100644 --- a/drivers/fwu-mdata/fwu-mdata-uclass.c +++ b/drivers/fwu-mdata/fwu-mdata-uclass.c @@ -14,7 +14,6 @@

#include <linux/errno.h> #include <linux/types.h> -#include <u-boot/crc.h>

/** * fwu_read_mdata() - Wrapper around fwu_mdata_ops.read_mdata() @@ -50,170 +49,6 @@ int fwu_write_mdata(struct udevice *dev, struct fwu_mdata *mdata, bool primary) return ops->write_mdata(dev, mdata, primary); }

-/** - * fwu_get_mdata_part_num() - Get the FWU metadata partition numbers - * @dev: FWU metadata device - * @mdata_parts: array for storing the metadata partition numbers - * - * Get the partition numbers on the storage device on which the - * FWU metadata is stored. Two partition numbers will be returned. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_get_mdata_part_num(struct udevice *dev, uint *mdata_parts) -{ - const struct fwu_mdata_ops *ops = device_get_ops(dev); - - if (!ops->get_mdata_part_num) { - log_debug("get_mdata_part_num() method not defined\n"); - return -ENOSYS; - } - - return ops->get_mdata_part_num(dev, mdata_parts); -} - -/** - * fwu_read_mdata_partition() - Read the FWU metadata from a partition - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * @part_num: Partition number from which FWU metadata is to be read - * - * Read the FWU metadata from the specified partition number - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_read_mdata_partition(struct udevice *dev, struct fwu_mdata *mdata, - uint part_num) -{ - const struct fwu_mdata_ops *ops = device_get_ops(dev); - - if (!ops->read_mdata_partition) { - log_debug("read_mdata_partition() method not defined\n"); - return -ENOSYS; - } - - return ops->read_mdata_partition(dev, mdata, part_num); -} - -/** - * fwu_write_mdata_partition() - Write the FWU metadata to a partition - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * @part_num: Partition number to which FWU metadata is to be written - * - * Write the FWU metadata to the specified partition number - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_write_mdata_partition(struct udevice *dev, struct fwu_mdata *mdata, - uint part_num) -{ - const struct fwu_mdata_ops *ops = device_get_ops(dev); - - if (!ops->write_mdata_partition) { - log_debug("write_mdata_partition() method not defined\n"); - return -ENOSYS; - } - - return ops->write_mdata_partition(dev, mdata, part_num); -} - -/** - * fwu_mdata_check() - Check if the FWU metadata is valid - * @dev: FWU metadata device - * - * Validate both copies of the FWU metadata. If one of the copies - * has gone bad, restore it from the other copy. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_mdata_check(struct udevice *dev) -{ - const struct fwu_mdata_ops *ops = device_get_ops(dev); - - if (!ops->check_mdata) { - log_debug("check_mdata() method not defined\n"); - return -ENOSYS; - } - - return ops->check_mdata(dev); -} - -/** - * fwu_get_mdata() - Get a FWU metadata copy - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * - * Get a valid copy of the FWU metadata. - * - * Note: This function is to be called first when modifying any fields - * in the metadata. The sequence of calls to modify any field in the - * metadata would be 1) fwu_get_mdata 2) Modify metadata, followed by - * 3) fwu_update_mdata - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_get_mdata(struct udevice *dev, struct fwu_mdata *mdata) -{ - const struct fwu_mdata_ops *ops = device_get_ops(dev); - - if (!ops->get_mdata) { - log_debug("get_mdata() method not defined\n"); - return -ENOSYS; - } - - return ops->get_mdata(dev, mdata); -} - -/** - * fwu_update_mdata() - Update the FWU metadata - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * - * Update the FWU metadata structure by writing to the - * FWU metadata partitions. - * - * Note: This function is not to be called directly to update the - * metadata fields. The sequence of function calls should be - * 1) fwu_get_mdata() 2) Modify the medata fields 3) fwu_update_mdata() - * - * The sequence of updating the partitions should be, update the - * primary metadata partition (first partition encountered), followed - * by updating the secondary partition. With this update sequence, in - * the rare scenario that the two metadata partitions are valid but do - * not match, maybe due to power outage at the time of updating the - * metadata copies, the secondary partition can be updated from the - * primary. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_update_mdata(struct udevice *dev, struct fwu_mdata *mdata) -{ - void *buf; - const struct fwu_mdata_ops *ops = device_get_ops(dev); - - if (!ops->update_mdata) { - log_debug("get_mdata() method not defined\n"); - return -ENOSYS; - } - - /* - * Calculate the crc32 for the updated FWU metadata - * and put the updated value in the FWU metadata crc32 - * field - */ - buf = &mdata->version; - mdata->crc32 = crc32(0, buf, sizeof(*mdata) - sizeof(u32)); - - return ops->update_mdata(dev, mdata); -} - UCLASS_DRIVER(fwu_mdata) = { .id = UCLASS_FWU_MDATA, .name = "fwu-mdata", diff --git a/drivers/fwu-mdata/gpt_blk.c b/drivers/fwu-mdata/gpt_blk.c index bdaa10cd1d..b3c6953a6e 100644 --- a/drivers/fwu-mdata/gpt_blk.c +++ b/drivers/fwu-mdata/gpt_blk.c @@ -28,7 +28,7 @@ static uint g_mdata_part[2]; /* = {0, 0} to check against uninit parts */

static int gpt_get_mdata_partitions(struct blk_desc *desc) { - int i, ret; + int i; u32 nparts; efi_guid_t part_type_guid; struct disk_partition info; @@ -52,12 +52,12 @@ static int gpt_get_mdata_partitions(struct blk_desc *desc) if (nparts != 2) { log_debug("Expect two copies of the FWU metadata instead of %d\n", nparts); - ret = -EINVAL; - } else { - ret = 0; + g_mdata_part[0] = 0; + g_mdata_part[1] = 0; + return -EINVAL; }

- return ret; + return 0; }

static int gpt_get_mdata_disk_part(struct blk_desc *desc, @@ -125,115 +125,6 @@ static int gpt_read_write_mdata(struct blk_desc *desc, return 0; }

-static int fwu_gpt_update_mdata(struct udevice *dev, struct fwu_mdata *mdata) -{ - int ret; - struct blk_desc *desc; - struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); - - desc = dev_get_uclass_plat(priv->blk_dev); - - ret = gpt_get_mdata_partitions(desc); - if (ret < 0) { - log_debug("Error getting the FWU metadata partitions\n"); - return -ENOENT; - } - - /* First write the primary partition */ - ret = gpt_read_write_mdata(desc, mdata, MDATA_WRITE, g_mdata_part[0]); - if (ret < 0) { - log_debug("Updating primary FWU metadata partition failed\n"); - return ret; - } - - /* And now the replica */ - ret = gpt_read_write_mdata(desc, mdata, MDATA_WRITE, g_mdata_part[1]); - if (ret < 0) { - log_debug("Updating secondary FWU metadata partition failed\n"); - return ret; - } - - return 0; -} - -static int gpt_get_mdata(struct blk_desc *desc, struct fwu_mdata *mdata) -{ - int ret; - - ret = gpt_get_mdata_partitions(desc); - if (ret < 0) { - log_debug("Error getting the FWU metadata partitions\n"); - return -ENOENT; - } - - ret = gpt_read_write_mdata(desc, mdata, MDATA_READ, g_mdata_part[0]); - if (ret < 0) { - log_debug("Failed to read the FWU metadata from the device\n"); - return -EIO; - } - - ret = fwu_verify_mdata(mdata, 1); - if (!ret) - return 0; - - /* - * Verification of the primary FWU metadata copy failed. - * Try to read the replica. - */ - memset(mdata, '\0', sizeof(struct fwu_mdata)); - ret = gpt_read_write_mdata(desc, mdata, MDATA_READ, g_mdata_part[1]); - if (ret < 0) { - log_debug("Failed to read the FWU metadata from the device\n"); - return -EIO; - } - - ret = fwu_verify_mdata(mdata, 0); - if (!ret) - return 0; - - /* Both the FWU metadata copies are corrupted. */ - return -EIO; -} - -static int fwu_gpt_get_mdata(struct udevice *dev, struct fwu_mdata *mdata) -{ - struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); - - return gpt_get_mdata(dev_get_uclass_plat(priv->blk_dev), mdata); -} - -static int fwu_gpt_get_mdata_partitions(struct udevice *dev, uint *mdata_parts) -{ - struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); - int err; - - err = gpt_get_mdata_partitions(dev_get_uclass_plat(priv->blk_dev)); - if (!err) { - mdata_parts[0] = g_mdata_part[0]; - mdata_parts[1] = g_mdata_part[1]; - } - - return err; -} - -static int fwu_gpt_read_mdata_partition(struct udevice *dev, - struct fwu_mdata *mdata, uint part_num) -{ - struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); - - return gpt_read_write_mdata(dev_get_uclass_plat(priv->blk_dev), - mdata, MDATA_READ, part_num); -} - -static int fwu_gpt_write_mdata_partition(struct udevice *dev, - struct fwu_mdata *mdata, uint part_num) -{ - struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); - - return gpt_read_write_mdata(dev_get_uclass_plat(priv->blk_dev), - mdata, MDATA_WRITE, part_num); -} - static int fwu_get_mdata_device(struct udevice *dev, struct udevice **mdata_dev) { u32 phandle; @@ -309,11 +200,6 @@ static int fwu_gpt_write_mdata(struct udevice *dev, struct fwu_mdata *mdata, static const struct fwu_mdata_ops fwu_gpt_blk_ops = { .read_mdata = fwu_gpt_read_mdata, .write_mdata = fwu_gpt_write_mdata, - .get_mdata = fwu_gpt_get_mdata, - .update_mdata = fwu_gpt_update_mdata, - .get_mdata_part_num = fwu_gpt_get_mdata_partitions, - .read_mdata_partition = fwu_gpt_read_mdata_partition, - .write_mdata_partition = fwu_gpt_write_mdata_partition, };

static const struct udevice_id fwu_mdata_ids[] = { diff --git a/include/fwu.h b/include/fwu.h index 1a700c9e6a..23bd97fe86 100644 --- a/include/fwu.h +++ b/include/fwu.h @@ -18,11 +18,6 @@ struct fwu_mdata_gpt_blk_priv { struct udevice *blk_dev; };

-/** - * @mdata_check: check the validity of the FWU metadata partitions - * @get_mdata() - Get a FWU metadata copy - * @update_mdata() - Update the FWU metadata copy - */ struct fwu_mdata_ops { /** * read_mdata() - Populate the asked FWU metadata copy @@ -43,78 +38,6 @@ struct fwu_mdata_ops { * Return: 0 if OK, -ve on error */ int (*write_mdata)(struct udevice *dev, struct fwu_mdata *mdata, bool primary); - - /** - * check_mdata() - Check if the FWU metadata is valid - * @dev: FWU device - * - * Validate both copies of the FWU metadata. If one of the copies - * has gone bad, restore it from the other copy. - * - * Return: 0 if OK, -ve on error - */ - int (*check_mdata)(struct udevice *dev); - - /** - * get_mdata() - Get a FWU metadata copy - * @dev: FWU device - * @mdata: Pointer to FWU metadata - * - * Get a valid copy of the FWU metadata. - * - * Return: 0 if OK, -ve on error - */ - int (*get_mdata)(struct udevice *dev, struct fwu_mdata *mdata); - - /** - * update_mdata() - Update the FWU metadata - * @dev: FWU device - * @mdata: Copy of the FWU metadata - * - * Update the FWU metadata structure by writing to the - * FWU metadata partitions. - * - * Return: 0 if OK, -ve on error - */ - int (*update_mdata)(struct udevice *dev, struct fwu_mdata *mdata); - - /** - * get_mdata_part_num() - Get the FWU metadata partition numbers - * @dev: FWU metadata device - * @mdata_parts: array for storing the metadata partition numbers - * - * Get the partition numbers on the storage device on which the - * FWU metadata is stored. Two partition numbers will be returned. - * - * Return: 0 if OK, -ve on error - */ - int (*get_mdata_part_num)(struct udevice *dev, uint *mdata_parts); - - /** - * read_mdata_partition() - Read the FWU metadata from a partition - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * @part_num: Partition number from which FWU metadata is to be read - * - * Read the FWU metadata from the specified partition number - * - * Return: 0 if OK, -ve on error - */ - int (*read_mdata_partition)(struct udevice *dev, - struct fwu_mdata *mdata, uint part_num); - - /** - * write_mdata_partition() - Write the FWU metadata to a partition - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * @part_num: Partition number to which FWU metadata is to be written - * - * Write the FWU metadata to the specified partition number - * - * Return: 0 if OK, -ve on error - */ - int (*write_mdata_partition)(struct udevice *dev, - struct fwu_mdata *mdata, uint part_num); };

#define FWU_MDATA_VERSION 0x1 @@ -167,102 +90,6 @@ int fwu_write_mdata(struct udevice *dev, struct fwu_mdata *mdata, bool primary); */ int fwu_get_verified_mdata(struct fwu_mdata *mdata);

-/** - * fwu_check_mdata_validity() - Check for validity of the FWU metadata copies - * - * Read both the metadata copies from the storage media, verify their - * checksum, and ascertain that both copies match. If one of the copies - * has gone bad, restore it from the good copy. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_check_mdata_validity(void); - -/** - * fwu_get_mdata_part_num() - Get the FWU metadata partition numbers - * @dev: FWU metadata device - * @mdata_parts: array for storing the metadata partition numbers - * - * Get the partition numbers on the storage device on which the - * FWU metadata is stored. Two partition numbers will be returned - * through the array. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_get_mdata_part_num(struct udevice *dev, uint *mdata_parts); - -/** - * fwu_read_mdata_partition() - Read the FWU metadata from a partition - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * @part_num: Partition number from which FWU metadata is to be read - * - * Read the FWU metadata from the specified partition number - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_read_mdata_partition(struct udevice *dev, struct fwu_mdata *mdata, - uint part_num); - -/** - * fwu_write_mdata_partition() - Write the FWU metadata to a partition - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * @part_num: Partition number to which FWU metadata is to be written - * - * Write the FWU metadata to the specified partition number - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_write_mdata_partition(struct udevice *dev, struct fwu_mdata *mdata, - uint part_num); - -/** - * fwu_get_mdata() - Get a FWU metadata copy - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * - * Get a valid copy of the FWU metadata. - * - * Note: This function is to be called first when modifying any fields - * in the metadata. The sequence of calls to modify any field in the - * metadata would be 1) fwu_get_mdata 2) Modify metadata, followed by - * 3) fwu_update_mdata - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_get_mdata(struct udevice *dev, struct fwu_mdata *mdata); - -/** - * fwu_update_mdata() - Update the FWU metadata - * @dev: FWU metadata device - * @mdata: Copy of the FWU metadata - * - * Update the FWU metadata structure by writing to the - * FWU metadata partitions. - * - * Note: This function is not to be called directly to update the - * metadata fields. The sequence of function calls should be - * 1) fwu_get_mdata() 2) Modify the medata fields 3) fwu_update_mdata() - * - * The sequence of updating the partitions should be, update the - * primary metadata partition (first partition encountered), followed - * by updating the secondary partition. With this update sequence, in - * the rare scenario that the two metadata partitions are valid but do - * not match, maybe due to power outage at the time of updating the - * metadata copies, the secondary partition can be updated from the - * primary. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_update_mdata(struct udevice *dev, struct fwu_mdata *mdata); - /** * fwu_get_active_index() - Get active_index from the FWU metadata * @active_idxp: active_index value to be read @@ -303,18 +130,6 @@ int fwu_set_active_index(uint active_idx); */ int fwu_get_image_index(u8 *image_index);

-/** - * fwu_mdata_check() - Check if the FWU metadata is valid - * @dev: FWU metadata device - * - * Validate both copies of the FWU metadata. If one of the copies - * has gone bad, restore it from the other copy. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_mdata_check(struct udevice *dev); - /** * fwu_revert_boot_index() - Revert the active index in the FWU metadata * @@ -327,20 +142,6 @@ int fwu_mdata_check(struct udevice *dev); */ int fwu_revert_boot_index(void);

-/** - * fwu_verify_mdata() - Verify the FWU metadata - * @mdata: FWU metadata structure - * @pri_part: FWU metadata partition is primary or secondary - * - * Verify the FWU metadata by computing the CRC32 for the metadata - * structure and comparing it against the CRC32 value stored as part - * of the structure. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_verify_mdata(struct fwu_mdata *mdata, bool pri_part); - /** * fwu_accept_image() - Set the Acceptance bit for the image * @img_type_id: GUID of the image type for which the accepted bit is to be diff --git a/lib/fwu_updates/fwu.c b/lib/fwu_updates/fwu.c index 7d195964a2..14a2af2c74 100644 --- a/lib/fwu_updates/fwu.c +++ b/lib/fwu_updates/fwu.c @@ -33,26 +33,6 @@ enum { BOTH_PARTS, };

-static int fwu_get_dev_mdata(struct udevice **dev, struct fwu_mdata *mdata) -{ - int ret; - - ret = uclass_first_device_err(UCLASS_FWU_MDATA, dev); - if (ret) { - log_debug("Cannot find fwu device\n"); - return ret; - } - - if (!mdata) - return 0; - - ret = fwu_get_mdata(*dev, mdata); - if (ret < 0) - log_debug("Unable to get valid FWU metadata\n"); - - return ret; -} - static int trial_counter_update(u16 *trial_state_ctr) { bool delete; @@ -281,136 +261,6 @@ ret_mdata: return err; }

-/** - * fwu_verify_mdata() - Verify the FWU metadata - * @mdata: FWU metadata structure - * @pri_part: FWU metadata partition is primary or secondary - * - * Verify the FWU metadata by computing the CRC32 for the metadata - * structure and comparing it against the CRC32 value stored as part - * of the structure. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_verify_mdata(struct fwu_mdata *mdata, bool pri_part) -{ - u32 calc_crc32; - void *buf; - - buf = &mdata->version; - calc_crc32 = crc32(0, buf, sizeof(*mdata) - sizeof(u32)); - - if (calc_crc32 != mdata->crc32) { - log_debug("crc32 check failed for %s FWU metadata partition\n", - pri_part ? "primary" : "secondary"); - return -EINVAL; - } - - return 0; -} - -/** - * fwu_check_mdata_validity() - Check for validity of the FWU metadata copies - * - * Read both the metadata copies from the storage media, verify their checksum, - * and ascertain that both copies match. If one of the copies has gone bad, - * restore it from the good copy. - * - * Return: 0 if OK, -ve on error - * - */ -int fwu_check_mdata_validity(void) -{ - int ret; - struct udevice *dev; - struct fwu_mdata pri_mdata; - struct fwu_mdata secondary_mdata; - uint mdata_parts[2]; - uint valid_partitions, invalid_partitions; - - ret = fwu_get_dev_mdata(&dev, NULL); - if (ret) - return ret; - - /* - * Check if the platform has defined its own - * function to check the metadata partitions' - * validity. If so, that takes precedence. - */ - ret = fwu_mdata_check(dev); - if (!ret || ret != -ENOSYS) - return ret; - - /* - * Two FWU metadata partitions are expected. - * If we don't have two, user needs to create - * them first - */ - valid_partitions = 0; - ret = fwu_get_mdata_part_num(dev, mdata_parts); - if (ret < 0) { - log_debug("Error getting the FWU metadata partitions\n"); - return -ENOENT; - } - - ret = fwu_read_mdata_partition(dev, &pri_mdata, mdata_parts[0]); - if (!ret) { - ret = fwu_verify_mdata(&pri_mdata, 1); - if (!ret) - valid_partitions |= PRIMARY_PART; - } - - ret = fwu_read_mdata_partition(dev, &secondary_mdata, mdata_parts[1]); - if (!ret) { - ret = fwu_verify_mdata(&secondary_mdata, 0); - if (!ret) - valid_partitions |= SECONDARY_PART; - } - - if (valid_partitions == (PRIMARY_PART | SECONDARY_PART)) { - /* - * Before returning, check that both the - * FWU metadata copies are the same. If not, - * populate the secondary partition from the - * primary partition copy. - */ - if (!memcmp(&pri_mdata, &secondary_mdata, - sizeof(struct fwu_mdata))) { - ret = 0; - } else { - log_info("Both FWU metadata copies are valid but do not match."); - log_info(" Restoring the secondary partition from the primary\n"); - ret = fwu_write_mdata_partition(dev, &pri_mdata, - mdata_parts[1]); - if (ret) - log_debug("Restoring secondary FWU metadata partition failed\n"); - } - goto out; - } - - if (!(valid_partitions & BOTH_PARTS)) { - log_info("Both FWU metadata partitions invalid\n"); - ret = -EBADMSG; - goto out; - } - - invalid_partitions = valid_partitions ^ BOTH_PARTS; - ret = fwu_write_mdata_partition(dev, - (invalid_partitions == PRIMARY_PART) ? - &secondary_mdata : &pri_mdata, - (invalid_partitions == PRIMARY_PART) ? - mdata_parts[0] : mdata_parts[1]); - - if (ret) - log_debug("Restoring %s FWU metadata partition failed\n", - (invalid_partitions == PRIMARY_PART) ? - "primary" : "secondary"); - -out: - return ret; -} - /** * fwu_get_active_index() - Get active_index from the FWU metadata * @active_idx: active_index value to be read @@ -423,19 +273,14 @@ out: */ int fwu_get_active_index(uint *active_idx) { - int ret; - struct udevice *dev; - struct fwu_mdata mdata = { 0 }; - - ret = fwu_get_dev_mdata(&dev, &mdata); - if (ret) - return ret; + int ret = 0; + struct fwu_mdata *mdata = &g_mdata;

/* * Found the FWU metadata partition, now read the active_index * value */ - *active_idx = mdata.active_index; + *active_idx = mdata->active_index; if (*active_idx >= CONFIG_FWU_NUM_BANKS) { log_debug("Active index value read is incorrect\n"); ret = -EINVAL; @@ -456,30 +301,25 @@ int fwu_get_active_index(uint *active_idx) int fwu_set_active_index(uint active_idx) { int ret; - struct udevice *dev; - struct fwu_mdata mdata = { 0 }; + struct fwu_mdata *mdata = &g_mdata;

if (active_idx >= CONFIG_FWU_NUM_BANKS) { log_debug("Invalid active index value\n"); return -EINVAL; }

- ret = fwu_get_dev_mdata(&dev, &mdata); - if (ret) - return ret; - /* * Update the active index and previous_active_index fields * in the FWU metadata */ - mdata.previous_active_index = mdata.active_index; - mdata.active_index = active_idx; + mdata->previous_active_index = mdata->active_index; + mdata->active_index = active_idx;

/* * Now write this updated FWU metadata to both the * FWU metadata partitions */ - ret = fwu_update_mdata(dev, &mdata); + ret = fwu_sync_mdata(mdata, BOTH_PARTS); if (ret) { log_debug("Failed to update FWU metadata partitions\n"); ret = -EIO; @@ -509,15 +349,10 @@ int fwu_get_image_index(u8 *image_index) u8 alt_num; uint update_bank; efi_guid_t *image_guid, image_type_id; - struct udevice *dev; - struct fwu_mdata mdata = { 0 }; + struct fwu_mdata *mdata = &g_mdata; struct fwu_image_entry *img_entry; struct fwu_image_bank_info *img_bank_info;

- ret = fwu_get_dev_mdata(&dev, &mdata); - if (ret) - return ret; - ret = fwu_plat_get_update_index(&update_bank); if (ret) { log_debug("Failed to get the FWU update bank\n"); @@ -538,11 +373,11 @@ int fwu_get_image_index(u8 *image_index) */ for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) { if (!guidcmp(&image_type_id, - &mdata.img_entry[i].image_type_uuid)) { - img_entry = &mdata.img_entry[i]; + &mdata->img_entry[i].image_type_uuid)) { + img_entry = &mdata->img_entry[i]; img_bank_info = &img_entry->img_bank_info[update_bank]; image_guid = &img_bank_info->image_uuid; - ret = fwu_plat_get_alt_num(dev, image_guid, &alt_num); + ret = fwu_plat_get_alt_num(g_dev, image_guid, &alt_num); if (ret) { log_debug("alt_num not found for partition with GUID %pUs\n", image_guid); @@ -577,26 +412,21 @@ int fwu_revert_boot_index(void) { int ret; u32 cur_active_index; - struct udevice *dev; - struct fwu_mdata mdata = { 0 }; - - ret = fwu_get_dev_mdata(&dev, &mdata); - if (ret) - return ret; + struct fwu_mdata *mdata = &g_mdata;

/* * Swap the active index and previous_active_index fields * in the FWU metadata */ - cur_active_index = mdata.active_index; - mdata.active_index = mdata.previous_active_index; - mdata.previous_active_index = cur_active_index; + cur_active_index = mdata->active_index; + mdata->active_index = mdata->previous_active_index; + mdata->previous_active_index = cur_active_index;

/* * Now write this updated FWU metadata to both the * FWU metadata partitions */ - ret = fwu_update_mdata(dev, &mdata); + ret = fwu_sync_mdata(mdata, BOTH_PARTS); if (ret) { log_debug("Failed to update FWU metadata partitions\n"); ret = -EIO; @@ -623,16 +453,11 @@ int fwu_revert_boot_index(void) static int fwu_clrset_image_accept(efi_guid_t *img_type_id, u32 bank, u8 action) { int ret, i; - struct udevice *dev; - struct fwu_mdata mdata = { 0 }; + struct fwu_mdata *mdata = &g_mdata; struct fwu_image_entry *img_entry; struct fwu_image_bank_info *img_bank_info;

- ret = fwu_get_dev_mdata(&dev, &mdata); - if (ret) - return ret; - - img_entry = &mdata.img_entry[0]; + img_entry = &mdata->img_entry[0]; for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) { if (!guidcmp(&img_entry[i].image_type_uuid, img_type_id)) { img_bank_info = &img_entry[i].img_bank_info[bank]; @@ -641,7 +466,7 @@ static int fwu_clrset_image_accept(efi_guid_t *img_type_id, u32 bank, u8 action) else img_bank_info->accepted = 0;

- ret = fwu_update_mdata(dev, &mdata); + ret = fwu_sync_mdata(mdata, BOTH_PARTS); goto out; } } @@ -776,8 +601,6 @@ static int fwu_boottime_checks(void *ctx, struct event *event) { int ret; u32 boot_idx, active_idx; - struct udevice *dev; - struct fwu_mdata mdata = { 0 };

/* Don't have boot time checks on sandbox */ if (IS_ENABLED(CONFIG_SANDBOX)) { @@ -785,9 +608,17 @@ static int fwu_boottime_checks(void *ctx, struct event *event) return 0; }

- ret = fwu_check_mdata_validity(); - if (ret) - return 0; + ret = uclass_first_device_err(UCLASS_FWU_MDATA, &g_dev); + if (ret) { + log_debug("Cannot find fwu device\n"); + return ret; + } + + ret = fwu_get_verified_mdata(NULL); + if (ret) { + log_debug("Unable to read meta-data\n"); + return ret; + }

/* * Get the Boot Index, i.e. the bank from @@ -823,11 +654,7 @@ static int fwu_boottime_checks(void *ctx, struct event *event) if (efi_init_obj_list() != EFI_SUCCESS) return 0;

- ret = fwu_get_dev_mdata(&dev, &mdata); - if (ret) - return ret; - - in_trial = in_trial_state(&mdata); + in_trial = in_trial_state(&g_mdata); if (!in_trial || (ret = fwu_trial_count_update()) > 0) ret = trial_counter_update(NULL);