Provide new function efi_dp_part_node() to create a device node for a partition.
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- v3 no change v2 no change --- include/efi_loader.h | 2 + lib/efi_loader/efi_device_path.c | 106 ++++++++++++++++++++++++++------------- 2 files changed, 72 insertions(+), 36 deletions(-)
diff --git a/include/efi_loader.h b/include/efi_loader.h index ae60c17ccb..e797b1bef5 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -298,6 +298,8 @@ struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
struct efi_device_path *efi_dp_from_dev(struct udevice *dev); struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part); +/* Create a device node for a block device partition. */ +struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part); struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part, const char *path); struct efi_device_path *efi_dp_from_eth(void); diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index c1ba54e6bd..f00a0ce645 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -484,50 +484,16 @@ static unsigned dp_part_size(struct blk_desc *desc, int part) }
/* - * Create a device path for a block device or one of its partitions. + * Create a device node for a block device partition. * * @buf buffer to which the device path is wirtten * @desc block device descriptor * @part partition number, 0 identifies a block device */ -static void *dp_part_fill(void *buf, struct blk_desc *desc, int part) +static void *dp_part_node(void *buf, struct blk_desc *desc, int part) { disk_partition_t info;
-#ifdef CONFIG_BLK - { - struct udevice *dev; - int ret = blk_find_device(desc->if_type, desc->devnum, &dev); - - if (ret) - dev = desc->bdev->parent; - buf = dp_fill(buf, dev); - } -#else - /* - * We *could* make a more accurate path, by looking at if_type - * and handling all the different cases like we do for non- - * legacy (ie CONFIG_BLK=y) case. But most important thing - * is just to have a unique device-path for if_type+devnum. - * So map things to a fictitious USB device. - */ - struct efi_device_path_usb *udp; - - memcpy(buf, &ROOT, sizeof(ROOT)); - buf += sizeof(ROOT); - - udp = buf; - udp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; - udp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_USB; - udp->dp.length = sizeof(*udp); - udp->parent_port_number = desc->if_type; - udp->usb_interface = desc->devnum; - buf = &udp[1]; -#endif - - if (part == 0) /* the actual disk, not a partition */ - return buf; - part_get_info(desc, part, &info);
if (desc->part_type == PART_TYPE_ISO) { @@ -582,6 +548,51 @@ static void *dp_part_fill(void *buf, struct blk_desc *desc, int part) return buf; }
+/* + * Create a device path for a block device or one of its partitions. + * + * @buf buffer to which the device path is wirtten + * @desc block device descriptor + * @part partition number, 0 identifies a block device + */ +static void *dp_part_fill(void *buf, struct blk_desc *desc, int part) +{ +#ifdef CONFIG_BLK + { + struct udevice *dev; + int ret = blk_find_device(desc->if_type, desc->devnum, &dev); + + if (ret) + dev = desc->bdev->parent; + buf = dp_fill(buf, dev); + } +#else + /* + * We *could* make a more accurate path, by looking at if_type + * and handling all the different cases like we do for non- + * legacy (ie CONFIG_BLK=y) case. But most important thing + * is just to have a unique device-path for if_type+devnum. + * So map things to a fictitious USB device. + */ + struct efi_device_path_usb *udp; + + memcpy(buf, &ROOT, sizeof(ROOT)); + buf += sizeof(ROOT); + + udp = buf; + udp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; + udp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_USB; + udp->dp.length = sizeof(*udp); + udp->parent_port_number = desc->if_type; + udp->usb_interface = desc->devnum; + buf = &udp[1]; +#endif + + if (part == 0) /* the actual disk, not a partition */ + return buf; + + return dp_part_node(buf, desc, part); +}
/* Construct a device-path from a partition on a blk device: */ struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part) @@ -599,6 +610,29 @@ struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part) return start; }
+/* + * Create a device node for a block device partition. + * + * @buf buffer to which the device path is wirtten + * @desc block device descriptor + * @part partition number, 0 identifies a block device + */ +struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part) +{ + efi_uintn_t dpsize; + void *buf; + + if (desc->part_type == PART_TYPE_ISO) + dpsize = sizeof(struct efi_device_path_cdrom_path); + else + dpsize = sizeof(struct efi_device_path_hard_drive_path); + buf = dp_alloc(dpsize); + + dp_part_node(buf, desc, part); + + return buf; +} + /* convert path to an UEFI style path (ie. DOS style backslashes and utf16) */ static void path_to_uefi(u16 *uefi, const char *path) {