| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * EFI device path from u-boot device-model mapping |
| * |
| * (C) Copyright 2017 Rob Clark |
| */ |
| |
| #include <common.h> |
| #include <blk.h> |
| #include <dm.h> |
| #include <log.h> |
| #include <net.h> |
| #include <usb.h> |
| #include <mmc.h> |
| #include <nvme.h> |
| #include <efi_loader.h> |
| #include <part.h> |
| #include <sandboxblockdev.h> |
| #include <asm-generic/unaligned.h> |
| #include <linux/compat.h> /* U16_MAX */ |
| |
| #ifdef CONFIG_SANDBOX |
| const efi_guid_t efi_guid_host_dev = U_BOOT_HOST_DEV_GUID; |
| #endif |
| |
| /* template END node: */ |
| static const struct efi_device_path END = { |
| .type = DEVICE_PATH_TYPE_END, |
| .sub_type = DEVICE_PATH_SUB_TYPE_END, |
| .length = sizeof(END), |
| }; |
| |
| /* template ROOT node: */ |
| static const struct efi_device_path_vendor ROOT = { |
| .dp = { |
| .type = DEVICE_PATH_TYPE_HARDWARE_DEVICE, |
| .sub_type = DEVICE_PATH_SUB_TYPE_VENDOR, |
| .length = sizeof(ROOT), |
| }, |
| .guid = U_BOOT_GUID, |
| }; |
| |
| #if defined(CONFIG_DM_MMC) && defined(CONFIG_MMC) |
| /* |
| * Determine if an MMC device is an SD card. |
| * |
| * @desc block device descriptor |
| * @return true if the device is an SD card |
| */ |
| static bool is_sd(struct blk_desc *desc) |
| { |
| struct mmc *mmc = find_mmc_device(desc->devnum); |
| |
| if (!mmc) |
| return false; |
| |
| return IS_SD(mmc) != 0U; |
| } |
| #endif |
| |
| static void *dp_alloc(size_t sz) |
| { |
| void *buf; |
| |
| if (efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, sz, &buf) != |
| EFI_SUCCESS) { |
| debug("EFI: ERROR: out of memory in %s\n", __func__); |
| return NULL; |
| } |
| |
| memset(buf, 0, sz); |
| return buf; |
| } |
| |
| /* |
| * Iterate to next block in device-path, terminating (returning NULL) |
| * at /End* node. |
| */ |
| struct efi_device_path *efi_dp_next(const struct efi_device_path *dp) |
| { |
| if (dp == NULL) |
| return NULL; |
| if (dp->type == DEVICE_PATH_TYPE_END) |
| return NULL; |
| dp = ((void *)dp) + dp->length; |
| if (dp->type == DEVICE_PATH_TYPE_END) |
| return NULL; |
| return (struct efi_device_path *)dp; |
| } |
| |
| /* |
| * Compare two device-paths, stopping when the shorter of the two hits |
| * an End* node. This is useful to, for example, compare a device-path |
| * representing a device with one representing a file on the device, or |
| * a device with a parent device. |
| */ |
| int efi_dp_match(const struct efi_device_path *a, |
| const struct efi_device_path *b) |
| { |
| while (1) { |
| int ret; |
| |
| ret = memcmp(&a->length, &b->length, sizeof(a->length)); |
| if (ret) |
| return ret; |
| |
| ret = memcmp(a, b, a->length); |
| if (ret) |
| return ret; |
| |
| a = efi_dp_next(a); |
| b = efi_dp_next(b); |
| |
| if (!a || !b) |
| return 0; |
| } |
| } |
| |
| /* |
| * We can have device paths that start with a USB WWID or a USB Class node, |
| * and a few other cases which don't encode the full device path with bus |
| * hierarchy: |
| * |
| * - MESSAGING:USB_WWID |
| * - MESSAGING:USB_CLASS |
| * - MEDIA:FILE_PATH |
| * - MEDIA:HARD_DRIVE |
| * - MESSAGING:URI |
| * |
| * See UEFI spec (section 3.1.2, about short-form device-paths) |
| */ |
| static struct efi_device_path *shorten_path(struct efi_device_path *dp) |
| { |
| while (dp) { |
| /* |
| * TODO: Add MESSAGING:USB_WWID and MESSAGING:URI.. |
| * in practice fallback.efi just uses MEDIA:HARD_DRIVE |
| * so not sure when we would see these other cases. |
| */ |
| if (EFI_DP_TYPE(dp, MESSAGING_DEVICE, MSG_USB_CLASS) || |
| EFI_DP_TYPE(dp, MEDIA_DEVICE, HARD_DRIVE_PATH) || |
| EFI_DP_TYPE(dp, MEDIA_DEVICE, FILE_PATH)) |
| return dp; |
| |
| dp = efi_dp_next(dp); |
| } |
| |
| return dp; |
| } |
| |
| static struct efi_object *find_obj(struct efi_device_path *dp, bool short_path, |
| struct efi_device_path **rem) |
| { |
| struct efi_object *efiobj; |
| efi_uintn_t dp_size = efi_dp_instance_size(dp); |
| |
| list_for_each_entry(efiobj, &efi_obj_list, link) { |
| struct efi_handler *handler; |
| struct efi_device_path *obj_dp; |
| efi_status_t ret; |
| |
| ret = efi_search_protocol(efiobj, |
| &efi_guid_device_path, &handler); |
| if (ret != EFI_SUCCESS) |
| continue; |
| obj_dp = handler->protocol_interface; |
| |
| do { |
| if (efi_dp_match(dp, obj_dp) == 0) { |
| if (rem) { |
| /* |
| * Allow partial matches, but inform |
| * the caller. |
| */ |
| *rem = ((void *)dp) + |
| efi_dp_instance_size(obj_dp); |
| return efiobj; |
| } else { |
| /* Only return on exact matches */ |
| if (efi_dp_instance_size(obj_dp) == |
| dp_size) |
| return efiobj; |
| } |
| } |
| |
| obj_dp = shorten_path(efi_dp_next(obj_dp)); |
| } while (short_path && obj_dp); |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * Find an efiobj from device-path, if 'rem' is not NULL, returns the |
| * remaining part of the device path after the matched object. |
| */ |
| struct efi_object *efi_dp_find_obj(struct efi_device_path *dp, |
| struct efi_device_path **rem) |
| { |
| struct efi_object *efiobj; |
| |
| /* Search for an exact match first */ |
| efiobj = find_obj(dp, false, NULL); |
| |
| /* Then for a fuzzy match */ |
| if (!efiobj) |
| efiobj = find_obj(dp, false, rem); |
| |
| /* And now for a fuzzy short match */ |
| if (!efiobj) |
| efiobj = find_obj(dp, true, rem); |
| |
| return efiobj; |
| } |
| |
| /* |
| * Determine the last device path node that is not the end node. |
| * |
| * @dp device path |
| * @return last node before the end node if it exists |
| * otherwise NULL |
| */ |
| const struct efi_device_path *efi_dp_last_node(const struct efi_device_path *dp) |
| { |
| struct efi_device_path *ret; |
| |
| if (!dp || dp->type == DEVICE_PATH_TYPE_END) |
| return NULL; |
| while (dp) { |
| ret = (struct efi_device_path *)dp; |
| dp = efi_dp_next(dp); |
| } |
| return ret; |
| } |
| |
| /* get size of the first device path instance excluding end node */ |
| efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp) |
| { |
| efi_uintn_t sz = 0; |
| |
| if (!dp || dp->type == DEVICE_PATH_TYPE_END) |
| return 0; |
| while (dp) { |
| sz += dp->length; |
| dp = efi_dp_next(dp); |
| } |
| |
| return sz; |
| } |
| |
| /* get size of multi-instance device path excluding end node */ |
| efi_uintn_t efi_dp_size(const struct efi_device_path *dp) |
| { |
| const struct efi_device_path *p = dp; |
| |
| if (!p) |
| return 0; |
| while (p->type != DEVICE_PATH_TYPE_END || |
| p->sub_type != DEVICE_PATH_SUB_TYPE_END) |
| p = (void *)p + p->length; |
| |
| return (void *)p - (void *)dp; |
| } |
| |
| /* copy multi-instance device path */ |
| struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp) |
| { |
| struct efi_device_path *ndp; |
| size_t sz = efi_dp_size(dp) + sizeof(END); |
| |
| if (!dp) |
| return NULL; |
| |
| ndp = dp_alloc(sz); |
| if (!ndp) |
| return NULL; |
| memcpy(ndp, dp, sz); |
| |
| return ndp; |
| } |
| |
| struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1, |
| const struct efi_device_path *dp2) |
| { |
| struct efi_device_path *ret; |
| |
| if (!dp1 && !dp2) { |
| /* return an end node */ |
| ret = efi_dp_dup(&END); |
| } else if (!dp1) { |
| ret = efi_dp_dup(dp2); |
| } else if (!dp2) { |
| ret = efi_dp_dup(dp1); |
| } else { |
| /* both dp1 and dp2 are non-null */ |
| unsigned sz1 = efi_dp_size(dp1); |
| unsigned sz2 = efi_dp_size(dp2); |
| void *p = dp_alloc(sz1 + sz2 + sizeof(END)); |
| if (!p) |
| return NULL; |
| memcpy(p, dp1, sz1); |
| /* the end node of the second device path has to be retained */ |
| memcpy(p + sz1, dp2, sz2 + sizeof(END)); |
| ret = p; |
| } |
| |
| return ret; |
| } |
| |
| struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp, |
| const struct efi_device_path *node) |
| { |
| struct efi_device_path *ret; |
| |
| if (!node && !dp) { |
| ret = efi_dp_dup(&END); |
| } else if (!node) { |
| ret = efi_dp_dup(dp); |
| } else if (!dp) { |
| size_t sz = node->length; |
| void *p = dp_alloc(sz + sizeof(END)); |
| if (!p) |
| return NULL; |
| memcpy(p, node, sz); |
| memcpy(p + sz, &END, sizeof(END)); |
| ret = p; |
| } else { |
| /* both dp and node are non-null */ |
| size_t sz = efi_dp_size(dp); |
| void *p = dp_alloc(sz + node->length + sizeof(END)); |
| if (!p) |
| return NULL; |
| memcpy(p, dp, sz); |
| memcpy(p + sz, node, node->length); |
| memcpy(p + sz + node->length, &END, sizeof(END)); |
| ret = p; |
| } |
| |
| return ret; |
| } |
| |
| struct efi_device_path *efi_dp_create_device_node(const u8 type, |
| const u8 sub_type, |
| const u16 length) |
| { |
| struct efi_device_path *ret; |
| |
| if (length < sizeof(struct efi_device_path)) |
| return NULL; |
| |
| ret = dp_alloc(length); |
| if (!ret) |
| return ret; |
| ret->type = type; |
| ret->sub_type = sub_type; |
| ret->length = length; |
| return ret; |
| } |
| |
| struct efi_device_path *efi_dp_append_instance( |
| const struct efi_device_path *dp, |
| const struct efi_device_path *dpi) |
| { |
| size_t sz, szi; |
| struct efi_device_path *p, *ret; |
| |
| if (!dpi) |
| return NULL; |
| if (!dp) |
| return efi_dp_dup(dpi); |
| sz = efi_dp_size(dp); |
| szi = efi_dp_instance_size(dpi); |
| p = dp_alloc(sz + szi + 2 * sizeof(END)); |
| if (!p) |
| return NULL; |
| ret = p; |
| memcpy(p, dp, sz + sizeof(END)); |
| p = (void *)p + sz; |
| p->sub_type = DEVICE_PATH_SUB_TYPE_INSTANCE_END; |
| p = (void *)p + sizeof(END); |
| memcpy(p, dpi, szi); |
| p = (void *)p + szi; |
| memcpy(p, &END, sizeof(END)); |
| return ret; |
| } |
| |
| struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp, |
| efi_uintn_t *size) |
| { |
| size_t sz; |
| struct efi_device_path *p; |
| |
| if (size) |
| *size = 0; |
| if (!dp || !*dp) |
| return NULL; |
| sz = efi_dp_instance_size(*dp); |
| p = dp_alloc(sz + sizeof(END)); |
| if (!p) |
| return NULL; |
| memcpy(p, *dp, sz + sizeof(END)); |
| *dp = (void *)*dp + sz; |
| if ((*dp)->sub_type == DEVICE_PATH_SUB_TYPE_INSTANCE_END) |
| *dp = (void *)*dp + sizeof(END); |
| else |
| *dp = NULL; |
| if (size) |
| *size = sz + sizeof(END); |
| return p; |
| } |
| |
| bool efi_dp_is_multi_instance(const struct efi_device_path *dp) |
| { |
| const struct efi_device_path *p = dp; |
| |
| if (!p) |
| return false; |
| while (p->type != DEVICE_PATH_TYPE_END) |
| p = (void *)p + p->length; |
| return p->sub_type == DEVICE_PATH_SUB_TYPE_INSTANCE_END; |
| } |
| |
| #ifdef CONFIG_DM |
| /* size of device-path not including END node for device and all parents |
| * up to the root device. |
| */ |
| __maybe_unused static unsigned int dp_size(struct udevice *dev) |
| { |
| if (!dev || !dev->driver) |
| return sizeof(ROOT); |
| |
| switch (dev->driver->id) { |
| case UCLASS_ROOT: |
| case UCLASS_SIMPLE_BUS: |
| /* stop traversing parents at this point: */ |
| return sizeof(ROOT); |
| case UCLASS_ETH: |
| return dp_size(dev->parent) + |
| sizeof(struct efi_device_path_mac_addr); |
| #ifdef CONFIG_BLK |
| case UCLASS_BLK: |
| switch (dev->parent->uclass->uc_drv->id) { |
| #ifdef CONFIG_IDE |
| case UCLASS_IDE: |
| return dp_size(dev->parent) + |
| sizeof(struct efi_device_path_atapi); |
| #endif |
| #if defined(CONFIG_SCSI) && defined(CONFIG_DM_SCSI) |
| case UCLASS_SCSI: |
| return dp_size(dev->parent) + |
| sizeof(struct efi_device_path_scsi); |
| #endif |
| #if defined(CONFIG_DM_MMC) && defined(CONFIG_MMC) |
| case UCLASS_MMC: |
| return dp_size(dev->parent) + |
| sizeof(struct efi_device_path_sd_mmc_path); |
| #endif |
| #if defined(CONFIG_NVME) |
| case UCLASS_NVME: |
| return dp_size(dev->parent) + |
| sizeof(struct efi_device_path_nvme); |
| #endif |
| #ifdef CONFIG_SANDBOX |
| case UCLASS_ROOT: |
| /* |
| * Sandbox's host device will be represented |
| * as vendor device with extra one byte for |
| * device number |
| */ |
| return dp_size(dev->parent) |
| + sizeof(struct efi_device_path_vendor) + 1; |
| #endif |
| default: |
| return dp_size(dev->parent); |
| } |
| #endif |
| #if defined(CONFIG_DM_MMC) && defined(CONFIG_MMC) |
| case UCLASS_MMC: |
| return dp_size(dev->parent) + |
| sizeof(struct efi_device_path_sd_mmc_path); |
| #endif |
| case UCLASS_MASS_STORAGE: |
| case UCLASS_USB_HUB: |
| return dp_size(dev->parent) + |
| sizeof(struct efi_device_path_usb_class); |
| default: |
| /* just skip over unknown classes: */ |
| return dp_size(dev->parent); |
| } |
| } |
| |
| /* |
| * Recursively build a device path. |
| * |
| * @buf pointer to the end of the device path |
| * @dev device |
| * @return pointer to the end of the device path |
| */ |
| __maybe_unused static void *dp_fill(void *buf, struct udevice *dev) |
| { |
| if (!dev || !dev->driver) |
| return buf; |
| |
| switch (dev->driver->id) { |
| case UCLASS_ROOT: |
| case UCLASS_SIMPLE_BUS: { |
| /* stop traversing parents at this point: */ |
| struct efi_device_path_vendor *vdp = buf; |
| *vdp = ROOT; |
| return &vdp[1]; |
| } |
| #ifdef CONFIG_DM_ETH |
| case UCLASS_ETH: { |
| struct efi_device_path_mac_addr *dp = |
| dp_fill(buf, dev->parent); |
| struct eth_pdata *pdata = dev->platdata; |
| |
| dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR; |
| dp->dp.length = sizeof(*dp); |
| memset(&dp->mac, 0, sizeof(dp->mac)); |
| /* We only support IPv4 */ |
| memcpy(&dp->mac, &pdata->enetaddr, ARP_HLEN); |
| /* Ethernet */ |
| dp->if_type = 1; |
| return &dp[1]; |
| } |
| #endif |
| #ifdef CONFIG_BLK |
| case UCLASS_BLK: |
| switch (dev->parent->uclass->uc_drv->id) { |
| #ifdef CONFIG_SANDBOX |
| case UCLASS_ROOT: { |
| /* stop traversing parents at this point: */ |
| struct efi_device_path_vendor *dp; |
| struct blk_desc *desc = dev_get_uclass_platdata(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_host_dev, |
| sizeof(efi_guid_t)); |
| dp->vendor_data[0] = desc->devnum; |
| return &dp->vendor_data[1]; |
| } |
| #endif |
| #ifdef CONFIG_IDE |
| case UCLASS_IDE: { |
| struct efi_device_path_atapi *dp = |
| dp_fill(buf, dev->parent); |
| struct blk_desc *desc = dev_get_uclass_platdata(dev); |
| |
| dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_ATAPI; |
| dp->dp.length = sizeof(*dp); |
| dp->logical_unit_number = desc->devnum; |
| dp->primary_secondary = IDE_BUS(desc->devnum); |
| dp->slave_master = desc->devnum % |
| (CONFIG_SYS_IDE_MAXDEVICE / |
| CONFIG_SYS_IDE_MAXBUS); |
| return &dp[1]; |
| } |
| #endif |
| #if defined(CONFIG_SCSI) && defined(CONFIG_DM_SCSI) |
| case UCLASS_SCSI: { |
| struct efi_device_path_scsi *dp = |
| dp_fill(buf, dev->parent); |
| struct blk_desc *desc = dev_get_uclass_platdata(dev); |
| |
| dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_SCSI; |
| dp->dp.length = sizeof(*dp); |
| dp->logical_unit_number = desc->lun; |
| dp->target_id = desc->target; |
| return &dp[1]; |
| } |
| #endif |
| #if defined(CONFIG_DM_MMC) && defined(CONFIG_MMC) |
| case UCLASS_MMC: { |
| struct efi_device_path_sd_mmc_path *sddp = |
| dp_fill(buf, dev->parent); |
| struct blk_desc *desc = dev_get_uclass_platdata(dev); |
| |
| sddp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| sddp->dp.sub_type = is_sd(desc) ? |
| DEVICE_PATH_SUB_TYPE_MSG_SD : |
| DEVICE_PATH_SUB_TYPE_MSG_MMC; |
| sddp->dp.length = sizeof(*sddp); |
| sddp->slot_number = dev->seq; |
| return &sddp[1]; |
| } |
| #endif |
| #if defined(CONFIG_NVME) |
| case UCLASS_NVME: { |
| struct efi_device_path_nvme *dp = |
| dp_fill(buf, dev->parent); |
| u32 ns_id; |
| |
| dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_NVME; |
| dp->dp.length = sizeof(*dp); |
| nvme_get_namespace_id(dev, &ns_id, dp->eui64); |
| memcpy(&dp->ns_id, &ns_id, sizeof(ns_id)); |
| return &dp[1]; |
| } |
| #endif |
| default: |
| debug("%s(%u) %s: unhandled parent class: %s (%u)\n", |
| __FILE__, __LINE__, __func__, |
| dev->name, dev->parent->uclass->uc_drv->id); |
| return dp_fill(buf, dev->parent); |
| } |
| #endif |
| #if defined(CONFIG_DM_MMC) && defined(CONFIG_MMC) |
| case UCLASS_MMC: { |
| struct efi_device_path_sd_mmc_path *sddp = |
| dp_fill(buf, dev->parent); |
| struct mmc *mmc = mmc_get_mmc_dev(dev); |
| struct blk_desc *desc = mmc_get_blk_desc(mmc); |
| |
| sddp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| sddp->dp.sub_type = is_sd(desc) ? |
| DEVICE_PATH_SUB_TYPE_MSG_SD : |
| DEVICE_PATH_SUB_TYPE_MSG_MMC; |
| sddp->dp.length = sizeof(*sddp); |
| sddp->slot_number = dev->seq; |
| |
| return &sddp[1]; |
| } |
| #endif |
| case UCLASS_MASS_STORAGE: |
| case UCLASS_USB_HUB: { |
| struct efi_device_path_usb_class *udp = |
| dp_fill(buf, dev->parent); |
| struct usb_device *udev = dev_get_parent_priv(dev); |
| struct usb_device_descriptor *desc = &udev->descriptor; |
| |
| udp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| udp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_USB_CLASS; |
| udp->dp.length = sizeof(*udp); |
| udp->vendor_id = desc->idVendor; |
| udp->product_id = desc->idProduct; |
| udp->device_class = desc->bDeviceClass; |
| udp->device_subclass = desc->bDeviceSubClass; |
| udp->device_protocol = desc->bDeviceProtocol; |
| |
| return &udp[1]; |
| } |
| default: |
| debug("%s(%u) %s: unhandled device class: %s (%u)\n", |
| __FILE__, __LINE__, __func__, |
| dev->name, dev->driver->id); |
| return dp_fill(buf, dev->parent); |
| } |
| } |
| #endif |
| |
| static unsigned dp_part_size(struct blk_desc *desc, int part) |
| { |
| unsigned dpsize; |
| |
| #ifdef CONFIG_BLK |
| { |
| struct udevice *dev; |
| int ret = blk_find_device(desc->if_type, desc->devnum, &dev); |
| |
| if (ret) |
| dev = desc->bdev->parent; |
| dpsize = dp_size(dev); |
| } |
| #else |
| dpsize = sizeof(ROOT) + sizeof(struct efi_device_path_usb); |
| #endif |
| |
| if (part == 0) /* the actual disk, not a partition */ |
| return dpsize; |
| |
| 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); |
| |
| return dpsize; |
| } |
| |
| /* |
| * Create a device node for a block device partition. |
| * |
| * @buf buffer to which the device path is written |
| * @desc block device descriptor |
| * @part partition number, 0 identifies a block device |
| */ |
| static void *dp_part_node(void *buf, struct blk_desc *desc, int part) |
| { |
| struct disk_partition info; |
| |
| part_get_info(desc, part, &info); |
| |
| if (desc->part_type == PART_TYPE_ISO) { |
| struct efi_device_path_cdrom_path *cddp = buf; |
| |
| cddp->boot_entry = part; |
| cddp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE; |
| cddp->dp.sub_type = DEVICE_PATH_SUB_TYPE_CDROM_PATH; |
| cddp->dp.length = sizeof(*cddp); |
| cddp->partition_start = info.start; |
| cddp->partition_size = info.size; |
| |
| buf = &cddp[1]; |
| } else { |
| struct efi_device_path_hard_drive_path *hddp = buf; |
| |
| hddp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE; |
| hddp->dp.sub_type = DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH; |
| hddp->dp.length = sizeof(*hddp); |
| hddp->partition_number = part; |
| hddp->partition_start = info.start; |
| hddp->partition_end = info.size; |
| if (desc->part_type == PART_TYPE_EFI) |
| hddp->partmap_type = 2; |
| else |
| hddp->partmap_type = 1; |
| |
| switch (desc->sig_type) { |
| case SIG_TYPE_NONE: |
| default: |
| hddp->signature_type = 0; |
| memset(hddp->partition_signature, 0, |
| sizeof(hddp->partition_signature)); |
| break; |
| case SIG_TYPE_MBR: |
| hddp->signature_type = 1; |
| memset(hddp->partition_signature, 0, |
| sizeof(hddp->partition_signature)); |
| memcpy(hddp->partition_signature, &desc->mbr_sig, |
| sizeof(desc->mbr_sig)); |
| break; |
| case SIG_TYPE_GUID: |
| hddp->signature_type = 2; |
| memcpy(hddp->partition_signature, &desc->guid_sig, |
| sizeof(hddp->partition_signature)); |
| break; |
| } |
| |
| buf = &hddp[1]; |
| } |
| |
| return buf; |
| } |
| |
| /* |
| * Create a device path for a block device or one of its partitions. |
| * |
| * @buf buffer to which the device path is written |
| * @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 (i.e. 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 block device: */ |
| struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part) |
| { |
| void *buf, *start; |
| |
| start = buf = dp_alloc(dp_part_size(desc, part) + sizeof(END)); |
| if (!buf) |
| return NULL; |
| |
| buf = dp_part_fill(buf, desc, part); |
| |
| *((struct efi_device_path *)buf) = END; |
| |
| return start; |
| } |
| |
| /* |
| * Create a device node for a block device partition. |
| * |
| * @buf buffer to which the device path is written |
| * @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; |
| } |
| |
| /** |
| * path_to_uefi() - convert UTF-8 path to an UEFI style path |
| * |
| * Convert UTF-8 path to a UEFI style path (i.e. with backslashes as path |
| * separators and UTF-16). |
| * |
| * @src: source buffer |
| * @uefi: target buffer, possibly unaligned |
| */ |
| static void path_to_uefi(void *uefi, const char *src) |
| { |
| u16 *pos = uefi; |
| |
| /* |
| * efi_set_bootdev() calls this routine indirectly before the UEFI |
| * subsystem is initialized. So we cannot assume unaligned access to be |
| * enabled. |
| */ |
| allow_unaligned(); |
| |
| while (*src) { |
| s32 code = utf8_get(&src); |
| |
| if (code < 0) |
| code = '?'; |
| else if (code == '/') |
| code = '\\'; |
| utf16_put(code, &pos); |
| } |
| *pos = 0; |
| } |
| |
| /* |
| * If desc is NULL, this creates a path with only the file component, |
| * otherwise it creates a full path with both device and file components |
| */ |
| struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part, |
| const char *path) |
| { |
| struct efi_device_path_file_path *fp; |
| void *buf, *start; |
| size_t dpsize = 0, fpsize; |
| |
| if (desc) |
| dpsize = dp_part_size(desc, part); |
| |
| fpsize = sizeof(struct efi_device_path) + |
| 2 * (utf8_utf16_strlen(path) + 1); |
| if (fpsize > U16_MAX) |
| return NULL; |
| |
| dpsize += fpsize; |
| |
| start = buf = dp_alloc(dpsize + sizeof(END)); |
| if (!buf) |
| return NULL; |
| |
| if (desc) |
| buf = dp_part_fill(buf, desc, part); |
| |
| /* add file-path: */ |
| fp = buf; |
| fp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE; |
| fp->dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH; |
| fp->dp.length = (u16)fpsize; |
| path_to_uefi(fp->str, path); |
| buf += fpsize; |
| |
| *((struct efi_device_path *)buf) = END; |
| |
| return start; |
| } |
| |
| #ifdef CONFIG_NET |
| struct efi_device_path *efi_dp_from_eth(void) |
| { |
| #ifndef CONFIG_DM_ETH |
| struct efi_device_path_mac_addr *ndp; |
| #endif |
| void *buf, *start; |
| unsigned dpsize = 0; |
| |
| assert(eth_get_dev()); |
| |
| #ifdef CONFIG_DM_ETH |
| dpsize += dp_size(eth_get_dev()); |
| #else |
| dpsize += sizeof(ROOT); |
| dpsize += sizeof(*ndp); |
| #endif |
| |
| start = buf = dp_alloc(dpsize + sizeof(END)); |
| if (!buf) |
| return NULL; |
| |
| #ifdef CONFIG_DM_ETH |
| buf = dp_fill(buf, eth_get_dev()); |
| #else |
| memcpy(buf, &ROOT, sizeof(ROOT)); |
| buf += sizeof(ROOT); |
| |
| ndp = buf; |
| ndp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE; |
| ndp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR; |
| ndp->dp.length = sizeof(*ndp); |
| ndp->if_type = 1; /* Ethernet */ |
| memcpy(ndp->mac.addr, eth_get_ethaddr(), ARP_HLEN); |
| buf = &ndp[1]; |
| #endif |
| |
| *((struct efi_device_path *)buf) = END; |
| |
| return start; |
| } |
| #endif |
| |
| /* Construct a device-path for memory-mapped image */ |
| struct efi_device_path *efi_dp_from_mem(uint32_t memory_type, |
| uint64_t start_address, |
| uint64_t end_address) |
| { |
| struct efi_device_path_memory *mdp; |
| void *buf, *start; |
| |
| start = buf = dp_alloc(sizeof(*mdp) + sizeof(END)); |
| if (!buf) |
| return NULL; |
| |
| mdp = buf; |
| mdp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE; |
| mdp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MEMORY; |
| mdp->dp.length = sizeof(*mdp); |
| mdp->memory_type = memory_type; |
| mdp->start_address = start_address; |
| mdp->end_address = end_address; |
| buf = &mdp[1]; |
| |
| *((struct efi_device_path *)buf) = END; |
| |
| return start; |
| } |
| |
| /** |
| * efi_dp_split_file_path() - split of relative file path from device path |
| * |
| * Given a device path indicating a file on a device, separate the device |
| * path in two: the device path of the actual device and the file path |
| * relative to this device. |
| * |
| * @full_path: device path including device and file path |
| * @device_path: path of the device |
| * @file_path: relative path of the file or NULL if there is none |
| * Return: status code |
| */ |
| efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path, |
| struct efi_device_path **device_path, |
| struct efi_device_path **file_path) |
| { |
| struct efi_device_path *p, *dp, *fp = NULL; |
| |
| *device_path = NULL; |
| *file_path = NULL; |
| dp = efi_dp_dup(full_path); |
| if (!dp) |
| return EFI_OUT_OF_RESOURCES; |
| p = dp; |
| while (!EFI_DP_TYPE(p, MEDIA_DEVICE, FILE_PATH)) { |
| p = efi_dp_next(p); |
| if (!p) |
| goto out; |
| } |
| fp = efi_dp_dup(p); |
| if (!fp) |
| return EFI_OUT_OF_RESOURCES; |
| p->type = DEVICE_PATH_TYPE_END; |
| p->sub_type = DEVICE_PATH_SUB_TYPE_END; |
| p->length = sizeof(*p); |
| |
| out: |
| *device_path = dp; |
| *file_path = fp; |
| return EFI_SUCCESS; |
| } |
| |
| /** |
| * efi_dp_from_name() - convert U-Boot device and file path to device path |
| * |
| * @dev: U-Boot device, e.g. 'mmc' |
| * @devnr: U-Boot device number, e.g. 1 for 'mmc:1' |
| * @path: file path relative to U-Boot device, may be NULL |
| * @device: pointer to receive device path of the device |
| * @file: pointer to receive device path for the file |
| * Return: status code |
| */ |
| efi_status_t efi_dp_from_name(const char *dev, const char *devnr, |
| const char *path, |
| struct efi_device_path **device, |
| struct efi_device_path **file) |
| { |
| int is_net; |
| struct blk_desc *desc = NULL; |
| struct disk_partition fs_partition; |
| int part = 0; |
| char filename[32] = { 0 }; /* dp->str is u16[32] long */ |
| char *s; |
| |
| if (path && !file) |
| return EFI_INVALID_PARAMETER; |
| |
| is_net = !strcmp(dev, "Net"); |
| if (!is_net) { |
| part = blk_get_device_part_str(dev, devnr, &desc, &fs_partition, |
| 1); |
| if (part < 0 || !desc) |
| return EFI_INVALID_PARAMETER; |
| |
| if (device) |
| *device = efi_dp_from_part(desc, part); |
| } else { |
| #ifdef CONFIG_NET |
| if (device) |
| *device = efi_dp_from_eth(); |
| #endif |
| } |
| |
| if (!path) |
| return EFI_SUCCESS; |
| |
| snprintf(filename, sizeof(filename), "%s", path); |
| /* DOS style file path: */ |
| s = filename; |
| while ((s = strchr(s, '/'))) |
| *s++ = '\\'; |
| *file = efi_dp_from_file(is_net ? NULL : desc, part, filename); |
| |
| if (!*file) |
| return EFI_INVALID_PARAMETER; |
| |
| return EFI_SUCCESS; |
| } |