X-Git-Url: https://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fplatform-powerpc.c;h=5d7cc597697f683fda11a439a0e2cc278d24f493;hp=a43dd676494a18e28dab0ea53b7029898644e07d;hb=78c3a044d2302bacf27ac2d9ef179bc35824af4c;hpb=87017f0478536fcb927010618be483a5efe9260c diff --git a/discover/platform-powerpc.c b/discover/platform-powerpc.c index a43dd67..5d7cc59 100644 --- a/discover/platform-powerpc.c +++ b/discover/platform-powerpc.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include @@ -28,12 +29,18 @@ static const char *devtree_dir = "/proc/device-tree/"; struct platform_powerpc { struct param_list *params; struct ipmi *ipmi; + char *ipmi_mailbox_original_config; int (*get_ipmi_bootdev)( struct platform_powerpc *platform, uint8_t *bootdev, bool *persistent); int (*clear_ipmi_bootdev)( struct platform_powerpc *platform, bool persistent); + int (*get_ipmi_boot_mailbox)( + struct platform_powerpc *platform, + char **buf); + int (*clear_ipmi_boot_mailbox)( + struct platform_powerpc *platform); int (*set_os_boot_sensor)( struct platform_powerpc *platform); void (*get_platform_versions)(struct system_info *info); @@ -429,6 +436,211 @@ static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform, return 0; } +static int get_ipmi_boot_mailbox_block(struct platform_powerpc *platform, + char *buf, uint8_t block) +{ + size_t blocksize = 16; + uint8_t resp[3 + 16]; + uint16_t resp_len; + char *debug_buf; + int rc; + uint8_t req[] = { + 0x07, /* parameter selector: boot initiator mailbox */ + block, /* set selector */ + 0x00, /* no block selector */ + }; + + resp_len = sizeof(resp); + rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS, + IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS, + req, sizeof(req), + resp, &resp_len, + ipmi_timeout); + if (rc) { + pb_log("platform: error reading IPMI boot options\n"); + return -1; + } + + if (resp_len < sizeof(resp)) { + if (resp_len < 3) { + pb_log("platform: unexpected length (%d) in " + "boot options mailbox response\n", + resp_len); + return -1; + } + + if (resp_len == 4) { + pb_debug_fn("block %hu empty\n", block); + return 0; + } + + blocksize = sizeof(resp) - 3; + pb_debug_fn("Mailbox block %hu returns only %zu bytes in block\n", + block, blocksize); + } + + debug_buf = format_buffer(platform, resp, resp_len); + pb_debug_fn("IPMI bootdev mailbox block %hu:\n%s\n", block, debug_buf); + talloc_free(debug_buf); + + if (resp[0] != 0) { + pb_log("platform: non-zero completion code %d from IPMI req\n", + resp[0]); + return -1; + } + + /* check for correct parameter version */ + if ((resp[1] & 0xf) != 0x1) { + pb_log("platform: unexpected version (0x%x) in " + "boot mailbox response\n", resp[0]); + return -1; + } + + /* check for valid paramters */ + if (resp[2] & 0x80) { + pb_debug("platform: boot mailbox parameters are invalid/locked\n"); + return -1; + } + + memcpy(buf, &resp[3], blocksize); + + return blocksize; +} + +static int get_ipmi_boot_mailbox(struct platform_powerpc *platform, + char **buf) +{ + char *mailbox_buffer, *prefix; + const size_t blocksize = 16; + char block_buffer[blocksize]; + size_t mailbox_size; + int content_size; + uint8_t i; + int rc; + + mailbox_buffer = NULL; + mailbox_size = 0; + + /* + * The BMC may hold up to 255 blocks of data but more likely the number + * will be closer to the minimum of 5 set by the specification and error + * on higher numbers. + */ + for (i = 0; i < UCHAR_MAX; i++) { + rc = get_ipmi_boot_mailbox_block(platform, block_buffer, i); + if (rc < 3 && i == 0) { + /* + * Immediate failure, no blocks read or missing IANA + * number. + */ + return -1; + } + if (rc < 1) { + /* Error or no bytes read */ + break; + } + + if (i == 0) { + /* + * The first three bytes of block zero are an IANA + * Enterprise ID number. Check it matches the IBM + * number, '2'. + */ + if (block_buffer[0] != 0x02 || + block_buffer[1] != 0x00 || + block_buffer[2] != 0x00) { + pb_log_fn("IANA number unrecognised: 0x%x:0x%x:0x%x\n", + block_buffer[0], + block_buffer[1], + block_buffer[2]); + return -1; + } + } + + mailbox_buffer = talloc_realloc(platform, mailbox_buffer, + char, mailbox_size + rc); + if (!mailbox_buffer) { + pb_log_fn("Failed to allocate mailbox buffer\n"); + return -1; + } + memcpy(mailbox_buffer + mailbox_size, block_buffer, rc); + mailbox_size += rc; + } + + if (i < 5) + pb_log_fn("Only %hu blocks read, spec requires at least 5.\n" + "Send a bug report to your preferred BMC vendor!\n", + i); + else + pb_debug_fn("%hu blocks read (%zu bytes)\n", i, mailbox_size); + + if (mailbox_size < 3 + strlen("petitboot,bootdevs=")) + return -1; + + prefix = talloc_strndup(mailbox_buffer, mailbox_buffer + 3, + strlen("petitboot,bootdevs=")); + if (!prefix) { + pb_log_fn("Couldn't check prefix\n"); + talloc_free(mailbox_buffer); + return -1; + } + + if (strncmp(prefix, "petitboot,bootdevs=", + strlen("petitboot,bootdevs=")) != 0 ) { + /* Empty or garbage */ + pb_debug_fn("Buffer looks unconfigured\n"); + talloc_free(mailbox_buffer); + *buf = NULL; + return 0; + } + + /* Don't include IANA number in buffer */ + content_size = mailbox_size - 3 - strlen("petitboot,bootdevs="); + *buf = talloc_memdup(platform, + mailbox_buffer + 3 + strlen("petitboot,bootdevs="), + content_size + 1); + (*buf)[content_size] = '\0'; + + talloc_free(mailbox_buffer); + return 0; +} + +static int clear_ipmi_boot_mailbox(struct platform_powerpc *platform) +{ + uint8_t req[18] = {0}; /* req (2) + blocksize (16) */ + uint16_t resp_len; + uint8_t resp[1]; + uint8_t i; + int rc; + + req[0] = 0x07; /* parameter selector: boot initiator mailbox */ + + resp_len = sizeof(resp); + + for (i = 0; i < UCHAR_MAX; i++) { + req[1] = i; /* set selector */ + rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS, + IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS, + req, sizeof(req), + resp, &resp_len, + ipmi_timeout); + + if (rc || resp[0]) { + if (i == 0) { + pb_log_fn("error clearing IPMI boot mailbox, " + "rc %d resp[0] %hu\n", + rc, resp[0]); + return -1; + } + break; + } + } + + pb_debug_fn("Cleared %hu blocks\n", i); + + return 0; +} + static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform) { int sensor_number; @@ -606,6 +818,31 @@ static int load_config(struct platform *p, struct config *config) if (rc) pb_log_fn("Failed to parse nvram\n"); + /* + * If we have an IPMI mailbox configuration available use it instead of + * the boot order found in NVRAM. + */ + if (platform->get_ipmi_boot_mailbox) { + char *mailbox; + struct param *param; + rc = platform->get_ipmi_boot_mailbox(platform, &mailbox); + if (!rc && mailbox) { + platform->ipmi_mailbox_original_config = + talloc_strdup( + platform, + param_list_get_value( + platform->params, "petitboot,bootdevs")); + param_list_set(platform->params, "petitboot,bootdevs", + mailbox, false); + param = param_list_get_param(platform->params, + "petitboot,bootdevs"); + /* Avoid writing this to NVRAM */ + param->modified = false; + config->ipmi_bootdev_mailbox = true; + talloc_free(mailbox); + } + } + config_populate_all(config, platform->params); if (platform->get_ipmi_bootdev) { @@ -639,6 +876,7 @@ static int save_config(struct platform *p, struct config *config) { struct platform_powerpc *platform = to_platform_powerpc(p); struct config *defaults; + struct param *param; if (config->ipmi_bootdev == IPMI_BOOTDEV_INVALID && platform->clear_ipmi_bootdev) { @@ -648,6 +886,23 @@ static int save_config(struct platform *p, struct config *config) config->ipmi_bootdev_persistent = false; } + if (!config->ipmi_bootdev_mailbox && + platform->ipmi_mailbox_original_config) { + param = param_list_get_param(platform->params, + "petitboot,bootdevs"); + /* Restore old boot order if unmodified */ + if (!param->modified) { + param_list_set(platform->params, "petitboot,bootdevs", + platform->ipmi_mailbox_original_config, + false); + param->modified = false; + config_populate_bootdev(config, platform->params); + } + platform->clear_ipmi_boot_mailbox(platform); + talloc_free(platform->ipmi_mailbox_original_config); + platform->ipmi_mailbox_original_config = NULL; + } + defaults = talloc_zero(platform, struct config); config_set_defaults(defaults); @@ -744,6 +999,8 @@ static bool probe(struct platform *p, void *ctx) platform->ipmi = ipmi_open(platform); platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi; platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi; + platform->get_ipmi_boot_mailbox = get_ipmi_boot_mailbox; + platform->clear_ipmi_boot_mailbox = clear_ipmi_boot_mailbox; platform->set_os_boot_sensor = set_ipmi_os_boot_sensor; } else if (!stat(sysparams_dir, &statbuf)) { pb_debug("platform: using sysparams for IPMI paramters\n");