Create a distinct EFI device path for each blkmap device.
Signed-off-by: Tobias Waldekranz tobias@waldekranz.com --- include/efi_loader.h | 4 ++++ lib/efi_loader/efi_device_path.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+)
diff --git a/include/efi_loader.h b/include/efi_loader.h index c664d6cdf2..eb3818b457 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -134,6 +134,10 @@ static inline efi_status_t efi_launch_capsules(void) #define U_BOOT_GUID \ EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \ 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b) +/* GUID used as root for blkmap devices */ +#define U_BOOT_BLKMAP_DEV_GUID \ + EFI_GUID(0x4cad859d, 0xd644, 0x42ff, \ + 0x87, 0x0b, 0xc0, 0x2e, 0xac, 0x05, 0x58, 0x63) /* GUID used as host device on sandbox */ #define U_BOOT_HOST_DEV_GUID \ EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \ diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index 3b267b713e..4b4c96bc2e 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -21,6 +21,9 @@ #include <asm-generic/unaligned.h> #include <linux/compat.h> /* U16_MAX */
+#ifdef CONFIG_BLKMAP +const efi_guid_t efi_guid_blkmap_dev = U_BOOT_BLKMAP_DEV_GUID; +#endif #ifdef CONFIG_SANDBOX const efi_guid_t efi_guid_host_dev = U_BOOT_HOST_DEV_GUID; #endif @@ -573,6 +576,16 @@ __maybe_unused static unsigned int dp_size(struct udevice *dev) */ return dp_size(dev->parent) + sizeof(struct efi_device_path_vendor) + 1; +#endif +#ifdef CONFIG_BLKMAP + case UCLASS_BLKMAP: + /* + * blkmap devices will be represented as a vendor + * device node with an extra byte for the device + * number. + */ + return dp_size(dev->parent) + + sizeof(struct efi_device_path_vendor) + 1; #endif default: return dp_size(dev->parent); @@ -631,6 +644,23 @@ __maybe_unused static void *dp_fill(void *buf, struct udevice *dev) #endif case UCLASS_BLK: switch (dev->parent->uclass->uc_drv->id) { +#ifdef CONFIG_BLKMAP + case UCLASS_BLKMAP: { + struct efi_device_path_vendor *dp; + struct blk_desc *desc = dev_get_uclass_plat(dev); + + dp_fill(buf, dev->parent); + dp = buf; + ++dp; + dp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE; + dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR; + dp->dp.length = sizeof(*dp) + 1; + memcpy(&dp->guid, &efi_guid_blkmap_dev, + sizeof(efi_guid_t)); + dp->vendor_data[0] = desc->devnum; + return &dp->vendor_data[1]; + } +#endif #ifdef CONFIG_SANDBOX case UCLASS_HOST: { /* stop traversing parents at this point: */