[PATCH v2 22/24] blk: Drop if_type
AKASHI Takahiro
takahiro.akashi at linaro.org
Wed Sep 14 10:20:03 CEST 2022
On Wed, Sep 14, 2022 at 09:45:47AM +0200, Heinrich Schuchardt wrote:
> On 9/14/22 04:08, AKASHI Takahiro wrote:
> > On Tue, Sep 13, 2022 at 06:27:37PM +0200, Heinrich Schuchardt wrote:
> > > On 8/12/22 03:35, Simon Glass wrote:
> > > > Use the uclass ID instead.
> > > >
> > > > Signed-off-by: Simon Glass <sjg at chromium.org>
> > > > ---
> > > >
> > > > (no changes since v1)
> > > >
> > > > cmd/blk_common.c | 2 +-
> > > > drivers/block/blk-uclass.c | 34 +++++++++++++++----------------
> > > > drivers/block/blk_legacy.c | 20 +++++++++----------
> > > > include/blk.h | 41 ++++++++++++++++++--------------------
> > > > include/efi_loader.h | 2 +-
> > > > 5 files changed, 48 insertions(+), 51 deletions(-)
> > > >
> > > > diff --git a/cmd/blk_common.c b/cmd/blk_common.c
> > > > index 4e442f2918b..369c5ae4bbe 100644
> > > > --- a/cmd/blk_common.c
> > > > +++ b/cmd/blk_common.c
> > > > @@ -12,7 +12,7 @@
> > > > #include <blk.h>
> > > > #include <command.h>
> > > >
> > > > -int blk_common_cmd(int argc, char *const argv[], enum if_type if_type,
> > > > +int blk_common_cmd(int argc, char *const argv[], enum uclass_id if_type,
> > > > int *cur_devnump)
> > > > {
> > > > const char *if_name = blk_get_if_type_name(if_type);
> > > > diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c
> > > > index 436af764f91..a9a85aa37f3 100644
> > > > --- a/drivers/block/blk-uclass.c
> > > > +++ b/drivers/block/blk-uclass.c
> > > > @@ -34,7 +34,7 @@ static struct {
> > > > { UCLASS_PVBLOCK, "pvblock" },
> > > > };
> > > >
> > > > -static enum if_type if_typename_to_iftype(const char *if_typename)
> > > > +static enum uclass_id if_typename_to_iftype(const char *if_typename)
> > > > {
> > > > int i;
> > > >
> > > > @@ -46,7 +46,7 @@ static enum if_type if_typename_to_iftype(const char *if_typename)
> > > > return UCLASS_INVALID;
> > > > }
> > > >
> > > > -static enum uclass_id if_type_to_uclass_id(enum if_type if_type)
> > > > +static enum uclass_id if_type_to_uclass_id(enum uclass_id if_type)
> > > > {
> > > > /*
> > > > * This strange adjustment is used because we use UCLASS_MASS_STORAGE
> > > > @@ -71,7 +71,7 @@ static enum uclass_id if_type_to_uclass_id(enum if_type if_type)
> > > > return if_type;
> > > > }
> > > >
> > > > -const char *blk_get_if_type_name(enum if_type if_type)
> > > > +const char *blk_get_if_type_name(enum uclass_id if_type)
> > > > {
> > > > int i;
> > > >
> > > > @@ -83,7 +83,7 @@ const char *blk_get_if_type_name(enum if_type if_type)
> > > > return "(none)";
> > > > }
> > > >
> > > > -struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum)
> > > > +struct blk_desc *blk_get_devnum_by_type(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_desc *desc;
> > > > struct udevice *dev;
> > > > @@ -105,7 +105,7 @@ struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum)
> > > > struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, int devnum)
> > > > {
> > > > enum uclass_id uclass_id;
> > > > - enum if_type type;
> > > > + enum uclass_id type;
> > > > struct udevice *dev;
> > > > struct uclass *uc;
> > > > int ret;
> > > > @@ -185,7 +185,7 @@ struct blk_desc *blk_get_by_device(struct udevice *dev)
> > > > * with a higher device number, -ENOENT if there is no such device but there
> > > > * is one with a higher number, or other -ve on other error.
> > > > */
> > > > -static int get_desc(enum if_type if_type, int devnum, struct blk_desc **descp)
> > > > +static int get_desc(enum uclass_id if_type, int devnum, struct blk_desc **descp)
> > > > {
> > > > bool found_more = false;
> > > > struct udevice *dev;
> > > > @@ -218,7 +218,7 @@ static int get_desc(enum if_type if_type, int devnum, struct blk_desc **descp)
> > > > return found_more ? -ENOENT : -ENODEV;
> > > > }
> > > >
> > > > -int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart)
> > > > +int blk_select_hwpart_devnum(enum uclass_id if_type, int devnum, int hwpart)
> > > > {
> > > > struct udevice *dev;
> > > > int ret;
> > > > @@ -230,7 +230,7 @@ int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart)
> > > > return blk_select_hwpart(dev, hwpart);
> > > > }
> > > >
> > > > -int blk_list_part(enum if_type if_type)
> > > > +int blk_list_part(enum uclass_id if_type)
> > > > {
> > > > struct blk_desc *desc;
> > > > int devnum, ok;
> > > > @@ -255,7 +255,7 @@ int blk_list_part(enum if_type if_type)
> > > > return 0;
> > > > }
> > > >
> > > > -int blk_print_part_devnum(enum if_type if_type, int devnum)
> > > > +int blk_print_part_devnum(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_desc *desc;
> > > > int ret;
> > > > @@ -270,7 +270,7 @@ int blk_print_part_devnum(enum if_type if_type, int devnum)
> > > > return 0;
> > > > }
> > > >
> > > > -void blk_list_devices(enum if_type if_type)
> > > > +void blk_list_devices(enum uclass_id if_type)
> > > > {
> > > > struct blk_desc *desc;
> > > > int ret;
> > > > @@ -289,7 +289,7 @@ void blk_list_devices(enum if_type if_type)
> > > > }
> > > > }
> > > >
> > > > -int blk_print_device_num(enum if_type if_type, int devnum)
> > > > +int blk_print_device_num(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_desc *desc;
> > > > int ret;
> > > > @@ -303,7 +303,7 @@ int blk_print_device_num(enum if_type if_type, int devnum)
> > > > return 0;
> > > > }
> > > >
> > > > -int blk_show_device(enum if_type if_type, int devnum)
> > > > +int blk_show_device(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_desc *desc;
> > > > int ret;
> > > > @@ -324,7 +324,7 @@ int blk_show_device(enum if_type if_type, int devnum)
> > > > return 0;
> > > > }
> > > >
> > > > -ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > +ulong blk_read_devnum(enum uclass_id if_type, int devnum, lbaint_t start,
> > > > lbaint_t blkcnt, void *buffer)
> > > > {
> > > > struct blk_desc *desc;
> > > > @@ -341,7 +341,7 @@ ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > return n;
> > > > }
> > > >
> > > > -ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > +ulong blk_write_devnum(enum uclass_id if_type, int devnum, lbaint_t start,
> > > > lbaint_t blkcnt, const void *buffer)
> > > > {
> > > > struct blk_desc *desc;
> > > > @@ -525,7 +525,7 @@ const char *blk_get_devtype(struct udevice *dev)
> > > > return uclass_get_name(device_get_uclass_id(parent));
> > > > };
> > > >
> > > > -int blk_find_max_devnum(enum if_type if_type)
> > > > +int blk_find_max_devnum(enum uclass_id if_type)
> > > > {
> > > > struct udevice *dev;
> > > > int max_devnum = -ENODEV;
> > > > @@ -545,7 +545,7 @@ int blk_find_max_devnum(enum if_type if_type)
> > > > return max_devnum;
> > > > }
> > > >
> > > > -int blk_next_free_devnum(enum if_type if_type)
> > > > +int blk_next_free_devnum(enum uclass_id if_type)
> > > > {
> > > > int ret;
> > > >
> > > > @@ -631,7 +631,7 @@ int blk_count_devices(enum blk_flag_t flag)
> > > > return count;
> > > > }
> > > >
> > > > -static int blk_claim_devnum(enum if_type if_type, int devnum)
> > > > +static int blk_claim_devnum(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct udevice *dev;
> > > > struct uclass *uc;
> > > > diff --git a/drivers/block/blk_legacy.c b/drivers/block/blk_legacy.c
> > > > index bd8a17df6a9..8c6f9cb208e 100644
> > > > --- a/drivers/block/blk_legacy.c
> > > > +++ b/drivers/block/blk_legacy.c
> > > > @@ -39,7 +39,7 @@ static struct blk_driver *blk_driver_lookup_typename(const char *if_typename)
> > > > return NULL;
> > > > }
> > > >
> > > > -const char *blk_get_if_type_name(enum if_type if_type)
> > > > +const char *blk_get_if_type_name(enum uclass_id if_type)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > >
> > > > @@ -70,7 +70,7 @@ static int get_desc(struct blk_driver *drv, int devnum, struct blk_desc **descp)
> > > > return drv->get_dev(devnum, descp);
> > > > }
> > > >
> > > > -int blk_list_part(enum if_type if_type)
> > > > +int blk_list_part(enum uclass_id if_type)
> > > > {
> > > > struct blk_driver *drv;
> > > > struct blk_desc *desc;
> > > > @@ -97,7 +97,7 @@ int blk_list_part(enum if_type if_type)
> > > > return 0;
> > > > }
> > > >
> > > > -int blk_print_part_devnum(enum if_type if_type, int devnum)
> > > > +int blk_print_part_devnum(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > struct blk_desc *desc;
> > > > @@ -115,7 +115,7 @@ int blk_print_part_devnum(enum if_type if_type, int devnum)
> > > > return 0;
> > > > }
> > > >
> > > > -void blk_list_devices(enum if_type if_type)
> > > > +void blk_list_devices(enum uclass_id if_type)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > struct blk_desc *desc;
> > > > @@ -133,7 +133,7 @@ void blk_list_devices(enum if_type if_type)
> > > > }
> > > > }
> > > >
> > > > -int blk_print_device_num(enum if_type if_type, int devnum)
> > > > +int blk_print_device_num(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > struct blk_desc *desc;
> > > > @@ -150,7 +150,7 @@ int blk_print_device_num(enum if_type if_type, int devnum)
> > > > return 0;
> > > > }
> > > >
> > > > -int blk_show_device(enum if_type if_type, int devnum)
> > > > +int blk_show_device(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > struct blk_desc *desc;
> > > > @@ -174,7 +174,7 @@ int blk_show_device(enum if_type if_type, int devnum)
> > > > return 0;
> > > > }
> > > >
> > > > -struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum)
> > > > +struct blk_desc *blk_get_devnum_by_type(enum uclass_id if_type, int devnum)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > struct blk_desc *desc;
> > > > @@ -214,7 +214,7 @@ struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, int devnum)
> > > > return desc;
> > > > }
> > > >
> > > > -ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > +ulong blk_read_devnum(enum uclass_id if_type, int devnum, lbaint_t start,
> > > > lbaint_t blkcnt, void *buffer)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > @@ -234,7 +234,7 @@ ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > return n;
> > > > }
> > > >
> > > > -ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > +ulong blk_write_devnum(enum uclass_id if_type, int devnum, lbaint_t start,
> > > > lbaint_t blkcnt, const void *buffer)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > @@ -249,7 +249,7 @@ ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > return desc->block_write(desc, start, blkcnt, buffer);
> > > > }
> > > >
> > > > -int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart)
> > > > +int blk_select_hwpart_devnum(enum uclass_id if_type, int devnum, int hwpart)
> > > > {
> > > > struct blk_driver *drv = blk_driver_lookup_type(if_type);
> > > > struct blk_desc *desc;
> > > > diff --git a/include/blk.h b/include/blk.h
> > > > index 548cd09d6bb..279f9ea4a9d 100644
> > > > --- a/include/blk.h
> > > > +++ b/include/blk.h
> > > > @@ -27,9 +27,6 @@ static inline bool blk_enabled(void)
> > > > return CONFIG_IS_ENABLED(BLK) || IS_ENABLED(CONFIG_SPL_LEGACY_BLOCK);
> > > > }
> > > >
> > > > -/* Interface types: */
> > > > -#define if_type uclass_id
> > > > -
> > > > #define BLK_VEN_SIZE 40
> > > > #define BLK_PRD_SIZE 20
> > > > #define BLK_REV_SIZE 8
> > > > @@ -57,7 +54,7 @@ struct blk_desc {
> > > > * TODO: With driver model we should be able to use the parent
> > > > * device's uclass instead.
> > > > */
> > > > - enum if_type if_type; /* type of the interface */
> > > > + enum uclass_id if_type; /* type of the interface */
> > > > int devnum; /* device number */
> > > > unsigned char part_type; /* partition type */
> > > > unsigned char target; /* target SCSI ID */
> > > > @@ -282,7 +279,7 @@ unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
> > > > * This function does not activate the device. The device will be returned
> > > > * whether or not it is activated.
> > > > *
> > > > - * @if_type: Interface type (enum if_type_t)
> > > > + * @if_type: Interface type (enum uclass_id_t)
> > > > * @devnum: Device number (specific to each interface type)
> > > > * @devp: the device, if found
> > > > * Return: 0 if found, -ENODEV if no device found, or other -ve error value
> > > > @@ -292,7 +289,7 @@ int blk_find_device(int if_type, int devnum, struct udevice **devp);
> > > > /**
> > > > * blk_get_device() - Find and probe a block device ready for use
> > > > *
> > > > - * @if_type: Interface type (enum if_type_t)
> > > > + * @if_type: Interface type (enum uclass_id_t)
> > > > * @devnum: Device number (specific to each interface type)
> > > > * @devp: the device, if found
> > > > * Return: 0 if found, -ENODEV if no device found, or other -ve error value
> > > > @@ -330,7 +327,7 @@ int blk_next_device(struct udevice **devp);
> > > > * @parent: Parent of the new device
> > > > * @drv_name: Driver name to use for the block device
> > > > * @name: Name for the device
> > > > - * @if_type: Interface type (enum if_type_t)
> > > > + * @if_type: Interface type (enum uclass_id_t)
> > > > * @devnum: Device number, specific to the interface type, or -1 to
> > > > * allocate the next available number
> > > > * @blksz: Block size of the device in bytes (typically 512)
> > > > @@ -347,7 +344,7 @@ int blk_create_device(struct udevice *parent, const char *drv_name,
> > > > * @parent: Parent of the new device
> > > > * @drv_name: Driver name to use for the block device
> > > > * @name: Name for the device (parent name is prepended)
> > > > - * @if_type: Interface type (enum if_type_t)
> > > > + * @if_type: Interface type (enum uclass_id_t)
> > > > * @devnum: Device number, specific to the interface type, or -1 to
> > > > * allocate the next available number
> > > > * @blksz: Block size of the device in bytes (typically 512)
> > > > @@ -390,7 +387,7 @@ int blk_unbind_all(int if_type);
> > > > * Return: maximum device number found, or -ENODEV if none, or other -ve on
> > > > * error
> > > > */
> > > > -int blk_find_max_devnum(enum if_type if_type);
> > > > +int blk_find_max_devnum(enum uclass_id if_type);
> > > >
> > > > /**
> > > > * blk_next_free_devnum() - get the next device number for an interface type
> > > > @@ -401,7 +398,7 @@ int blk_find_max_devnum(enum if_type if_type);
> > > > * @if_type: Interface type to scan
> > > > * Return: next device number safe to use, or -ve on error
> > > > */
> > > > -int blk_next_free_devnum(enum if_type if_type);
> > > > +int blk_next_free_devnum(enum uclass_id if_type);
> > > >
> > > > /**
> > > > * blk_select_hwpart() - select a hardware partition
> > > > @@ -496,7 +493,7 @@ static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start,
> > > > */
> > > > struct blk_driver {
> > > > const char *if_typename;
> > > > - enum if_type if_type;
> > > > + enum uclass_id if_type;
> > > > int max_devs;
> > > > struct blk_desc *desc;
> > > > /**
> > > > @@ -557,7 +554,7 @@ struct blk_driver *blk_driver_lookup_type(int if_type);
> > > > * @devnum: Device number
> > > > * Return: point to block device descriptor, or NULL if not found
> > > > */
> > > > -struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum);
> > > > +struct blk_desc *blk_get_devnum_by_type(enum uclass_id if_type, int devnum);
> > > >
> > > > /**
> > > > * blk_get_devnum_by_type() - Get a block device by type name, and number
> > > > @@ -594,7 +591,7 @@ int blk_dselect_hwpart(struct blk_desc *desc, int hwpart);
> > > > * @if_type: Block device type
> > > > * Return: 0 if OK, -ENODEV if there is none of that type
> > > > */
> > > > -int blk_list_part(enum if_type if_type);
> > > > +int blk_list_part(enum uclass_id if_type);
> > > >
> > > > /**
> > > > * blk_list_devices() - list the block devices of a given type
> > > > @@ -604,7 +601,7 @@ int blk_list_part(enum if_type if_type);
> > > > *
> > > > * @if_type: Block device type
> > > > */
> > > > -void blk_list_devices(enum if_type if_type);
> > > > +void blk_list_devices(enum uclass_id if_type);
> > > >
> > > > /**
> > > > * blk_show_device() - show information about a given block device
> > > > @@ -615,7 +612,7 @@ void blk_list_devices(enum if_type if_type);
> > > > * @devnum: Device number
> > > > * Return: 0 if OK, -ENODEV for invalid device number
> > > > */
> > > > -int blk_show_device(enum if_type if_type, int devnum);
> > > > +int blk_show_device(enum uclass_id if_type, int devnum);
> > > >
> > > > /**
> > > > * blk_print_device_num() - show information about a given block device
> > > > @@ -628,7 +625,7 @@ int blk_show_device(enum if_type if_type, int devnum);
> > > > * Return: 0 if OK, -ENODEV for invalid device number, -ENOENT if the block
> > > > * device is not connected
> > > > */
> > > > -int blk_print_device_num(enum if_type if_type, int devnum);
> > > > +int blk_print_device_num(enum uclass_id if_type, int devnum);
> > > >
> > > > /**
> > > > * blk_print_part_devnum() - print the partition information for a device
> > > > @@ -638,7 +635,7 @@ int blk_print_device_num(enum if_type if_type, int devnum);
> > > > * Return: 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if
> > > > * the interface type is not supported, other -ve on other error
> > > > */
> > > > -int blk_print_part_devnum(enum if_type if_type, int devnum);
> > > > +int blk_print_part_devnum(enum uclass_id if_type, int devnum);
> > > >
> > > > /**
> > > > * blk_read_devnum() - read blocks from a device
> > > > @@ -649,7 +646,7 @@ int blk_print_part_devnum(enum if_type if_type, int devnum);
> > > > * @buffer: Address to write data to
> > > > * Return: number of blocks read, or -ve error number on error
> > > > */
> > > > -ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > +ulong blk_read_devnum(enum uclass_id if_type, int devnum, lbaint_t start,
> > > > lbaint_t blkcnt, void *buffer);
> > > >
> > > > /**
> > > > @@ -661,7 +658,7 @@ ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > * @buffer: Address to read data from
> > > > * Return: number of blocks written, or -ve error number on error
> > > > */
> > > > -ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > +ulong blk_write_devnum(enum uclass_id if_type, int devnum, lbaint_t start,
> > > > lbaint_t blkcnt, const void *buffer);
> > > >
> > > > /**
> > > > @@ -675,7 +672,7 @@ ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
> > > > * @hwpart: Partition number to select
> > > > * Return: 0 if OK, -ve on error
> > > > */
> > > > -int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart);
> > > > +int blk_select_hwpart_devnum(enum uclass_id if_type, int devnum, int hwpart);
> > > >
> > > > /**
> > > > * blk_get_if_type_name() - Get the name of an interface type
> > > > @@ -683,7 +680,7 @@ int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart);
> > > > * @if_type: Interface type to check
> > > > * Return: name of interface, or NULL if none
> > > > */
> > > > -const char *blk_get_if_type_name(enum if_type if_type);
> > > > +const char *blk_get_if_type_name(enum uclass_id if_type);
> > > >
> > > > /**
> > > > * blk_common_cmd() - handle common commands with block devices
> > > > @@ -694,7 +691,7 @@ const char *blk_get_if_type_name(enum if_type if_type);
> > > > * @cur_devnump: Current device number for this interface type
> > > > * Return: 0 if OK, CMD_RET_ERROR on error
> > > > */
> > > > -int blk_common_cmd(int argc, char *const argv[], enum if_type if_type,
> > > > +int blk_common_cmd(int argc, char *const argv[], enum uclass_id if_type,
> > > > int *cur_devnump);
> > > >
> > > > enum blk_flag_t {
> > > > diff --git a/include/efi_loader.h b/include/efi_loader.h
> > > > index 3a63a1f75fd..ae58efb0036 100644
> > > > --- a/include/efi_loader.h
> > > > +++ b/include/efi_loader.h
> > > > @@ -156,7 +156,7 @@ extern bool efi_st_keep_devices;
> > > >
> > > > /* EFI system partition */
> > > > extern struct efi_system_partition {
> > > > - enum if_type if_type;
> > > > + enum uclass_id if_type;
> > > > int devnum;
> > >
> > > Please, rename the field if_type to class_id in a later patch.
> > >
> > > Uclass ID and device number may refer to a different device after
> > > commands like usb init. It would be better if we could use the partition
> > > GUID to identify a partition in the long term. But that is beyond the
> > > scope of this series.
> >
> > Well, as far as UEFI is concerned, we should use a device path
> > (and/or a handle to it) to uniquely identify a given device.
>
> The address pointed to by a handle or struct udevice * maybe reused
> after deleting the handle or device. This is why I mentioned the
> partition GUID.
1) With a device path, you can find a corresponding handle dynamically
by using efi_dp_find_obj().
2) With a handle, you can maintain (update) it by using
EVT_DM_POST_PROBE/REMOVE hooks as "efi_system_partition" variable
is in efi_disk_add_dev().
So both approaches are very much feasible, not depending directly
on the underlying U-Boot representation.
-Takahiro Akashi
> A device path for a partition contains the partition GUID, see UEFI spec
> 2.10, 10.3.5.1 Hard Drive.
>
> Regards
>
> Heinrich
>
> >
> > Then the whole code in efi_var_file.c can be rewritten
> > by using SIMPLE_FILE_SYSTEM_PROTOCOL attached to it.
> >
> > -Takahiro Akashi
> >
> > > Acked-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> > >
> > >
> > > > u8 part;
> > >
> > >
> > >
> > > > } efi_system_partition;
> > >
>
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