diff options
| -rw-r--r-- | core/pldm/Makefile.inc | 2 | ||||
| -rw-r--r-- | core/pldm/pldm-lid-files.c | 186 | ||||
| -rw-r--r-- | include/pldm.h | 7 |
3 files changed, 194 insertions, 1 deletions
diff --git a/core/pldm/Makefile.inc b/core/pldm/Makefile.inc index d89e4c2..87952db 100644 --- a/core/pldm/Makefile.inc +++ b/core/pldm/Makefile.inc @@ -10,7 +10,7 @@ CPPFLAGS += -I$(SRC)/pldm/include/libpldm/oem/ibm/ PLDM_OBJS = pldm-mctp.o pldm-responder.o pldm-requester.o PLDM_OBJS += pldm-base-requests.o pldm-platform-requests.o PLDM_OBJS += pldm-bios-requests.o pldm-fru-requests.o -PLDM_OBJS += pldm-file-io-requests.o +PLDM_OBJS += pldm-file-io-requests.o pldm-lid-files.o PLDM = $(PLDM_DIR)/built-in.a $(PLDM): $(PLDM_OBJS:%=$(PLDM_DIR)/%) diff --git a/core/pldm/pldm-lid-files.c b/core/pldm/pldm-lid-files.c new file mode 100644 index 0000000..a46a731 --- /dev/null +++ b/core/pldm/pldm-lid-files.c @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later +// Copyright 2022 IBM Corp. + +#define pr_fmt(fmt) "PLDM: " fmt + +#include <endian.h> +#include <lock.h> +#include <opal-api.h> +#include <libflash/errors.h> +#include <libflash/ffs.h> +#include "pldm.h" + +/* + * This struct is used to map a PNOR sections. + * The content is deriving from the hb_lid_ids PLDM BIOS Attribute. + */ +struct pldm_lid { + struct list_node list; + uint32_t start; + uint32_t handle; + uint32_t length; + char name[FFS_PART_NAME_MAX + 1]; + char id[FFS_PART_NAME_MAX + 1]; +}; + +static LIST_HEAD(lid_files); + +#define MEGABYTE (1024*1024) + +/* + * When using PLDM for PNOR Resource Provider operations, + * reserve 32 MB of VMM address space per section. + * Note that all of this space may not actually be used by each section. + */ +#define VMM_SIZE_RESERVED_PER_SECTION (32 * MEGABYTE) + +/* + * Print the attributes of lid files. + */ +static void print_lid_files_attr(void) +{ + struct pldm_lid *lid = NULL; + + list_for_each(&lid_files, lid, list) + prlog(PR_NOTICE, "name: %s, id: %s, handle: %d, length: 0x%x, start: 0x%x\n", + lid->name, lid->id, lid->handle, lid->length, lid->start); +} + +/* + * Return the number of lid files. + */ +static uint32_t get_lids_count(void) +{ + struct pldm_lid *lid = NULL; + uint32_t count = 0; + + list_for_each(&lid_files, lid, list) + count++; + + return count; +} + +/* + * parse the "hb_lid_ids" string + * <ATTR_a>=<lid_id_1>,<ATTR_b>=<lid_id_2> + */ +static int parse_hb_lid_ids_string(char *str) +{ + struct pldm_lid *lid, *tmp; + const char *pp = "="; + char *attr, *attr_end; + int rc, count = 1; + char *lid_id; + + for (char *p = strtok(str, ","); p != NULL; p = strtok(NULL, ",")) { + lid = zalloc(sizeof(struct pldm_lid)); + if (!lid) { + prlog(PR_ERR, "Error allocating pldm_lid structure\n"); + rc = OPAL_NO_MEM; + goto err; + } + + /* parse the string <attr>=<lid_id> */ + attr = p; + while ((*pp != *p) && (*p != '\0')) + p++; + + attr_end = p; + lid_id = ++p; + *attr_end = '\0'; + + strcpy(lid->name, attr); + strcpy(lid->id, lid_id); + + /* reserve 32 MB of VMM address space per section. + * Address 0x0 -> 0x2000000: 'fake' header flash + * Address 0x2000000 -> 0x4000000: lid id 1 + * Address 0x4000000 -> 0x6000000: lid id 2 + * .... + */ + lid->start = VMM_SIZE_RESERVED_PER_SECTION * count; + + /* handle and length */ + rc = pldm_find_file_handle_by_lid_id(lid->id, + &lid->handle, + &lid->length); + /* OPAL_PARAMETER means that lid_id is present in hb_lid_ids, + * but we don't have any file attribute information in the + * file table, so continue on the next item. + */ + if ((rc) && (rc != OPAL_PARAMETER)) + goto err; + + if (lid->length > VMM_SIZE_RESERVED_PER_SECTION) { + prlog(PR_ERR, "file length (0x%x) > virtual size reserved per " + "section (0x%x)\n", + lid->length, VMM_SIZE_RESERVED_PER_SECTION); + rc = OPAL_RESOURCE; + goto err; + } + + /* add new member in the global list */ + list_add_tail(&lid_files, &lid->list); + + count++; + } + + return OPAL_SUCCESS; + +err: + /* free all lid entries */ + list_for_each_safe(&lid_files, lid, tmp, list) + free(lid); + + return rc; +} + +/* + * Parse the "hb_lid_ids" string from bios tables and complete + * the global list of lid files. + */ +static int lid_ids_to_vaddr_mapping(void) +{ + char *lid_ids_string = NULL; + int rc; + + /* get lid ids string from bios tables */ + rc = pldm_bios_get_lids_id(&lid_ids_string); + if (rc) + goto out; + + /* parse the "hb_lid_ids" string */ + rc = parse_hb_lid_ids_string(lid_ids_string); + +out: + if (lid_ids_string) + free(lid_ids_string); + + return rc; +} + +int pldm_lid_files_init(struct blocklevel_device **bl) +{ + uint32_t lid_files_count; + int rc; + + if (!bl) + return FLASH_ERR_PARM_ERROR; + + *bl = NULL; + + /* convert lid ids data to pnor structure */ + rc = lid_ids_to_vaddr_mapping(); + if (rc) + goto err; + + lid_files_count = get_lids_count(); + + prlog(PR_NOTICE, "Number of lid files: %d\n", lid_files_count); + print_lid_files_attr(); + + return OPAL_SUCCESS; + +err: + return rc; +} diff --git a/include/pldm.h b/include/pldm.h index 3c23dc9..9c5369e 100644 --- a/include/pldm.h +++ b/include/pldm.h @@ -5,6 +5,8 @@ #ifndef __PLDM_H__ #define __PLDM_H__ +#include <skiboot.h> + /** * Handle PLDM messages received from MCTP */ @@ -36,4 +38,9 @@ int pldm_platform_restart(void); */ int pldm_fru_dt_add_bmc_version(void); +/** + * Convert lid ids data to pnor structure + */ +int pldm_lid_files_init(struct blocklevel_device **bl); + #endif /* __PLDM_H__ */ |