firmware/efi/capsule.c

1 // SPDX-License-Identifier: GPL-2.0
25 static int efi_reset_type = -1;
34  * efi_capsule_pending - has a capsule been passed to the firmware?
47  * A non-racy use is from platform reboot code because we use
74  * efi_capsule_supported - does the firmware support the capsule?
94 		return -EINVAL;  in efi_capsule_supported()
105 		return -ENOSPC;  in efi_capsule_supported()
112  * Every scatter gather list (block descriptor) page must end with a
116 #define SGLIST_PER_PAGE	((PAGE_SIZE / sizeof(efi_capsule_block_desc_t)) - 1)
119  * How many scatter gather list (block descriptor) pages do we need
128  * efi_capsule_update_locked - pass a single capsule to the firmware
130  * @sg_pages: array of scatter gather (block descriptor) pages
158 		return -EINVAL;  in efi_capsule_update_locked()
169 		return -EINVAL;  in efi_capsule_update_locked()
184  * efi_capsule_update - send a capsule to the firmware
188  * Build a scatter gather list with EFI capsule block descriptors to
218 	u32 imagesize = capsule->imagesize;  in efi_capsule_update()
219 	efi_guid_t guid = capsule->guid;  in efi_capsule_update()
221 	u32 flags = capsule->flags;  in efi_capsule_update()
235 		return -ENOMEM;  in efi_capsule_update()
240 			rv = -ENOMEM;  in efi_capsule_update()
252 				       PAGE_SIZE - (u64)*pages % PAGE_SIZE);  in efi_capsule_update()
257 			imagesize -= sz;  in efi_capsule_update()
258 			count--;  in efi_capsule_update()