discover/platform: rename finalise_config hook
[petitboot] / discover / platform-powerpc.c
index e5dac9efcc8e4b2b8a8f7ef540fe78e5232e8e04..f6a78a9e52a276dc847f1401173d3ffe5b99afbb 100644 (file)
@@ -21,6 +21,7 @@
 static const char *partition = "common";
 static const char *sysparams_dir = "/sys/firmware/opal/sysparams/";
 static const char *devtree_dir = "/proc/device-tree/";
+static const int ipmi_timeout = 500; /* milliseconds */
 
 struct param {
        char                    *name;
@@ -30,7 +31,14 @@ struct param {
 };
 
 struct platform_powerpc {
-       struct list             params;
+       struct list     params;
+       struct ipmi     *ipmi;
+       bool            ipmi_bootdev_persistent;
+       int             (*get_ipmi_bootdev)(
+                               struct platform_powerpc *platform,
+                               uint8_t *bootdev, bool *persistent);
+       int             (*clear_ipmi_bootdev)(
+                               struct platform_powerpc *platform);
 };
 
 static const char *known_params[] = {
@@ -570,17 +578,26 @@ static int update_config(struct platform_powerpc *platform,
        return write_nvram(platform);
 }
 
-static void set_exclusive_devtype(struct config *config,
-               enum device_type devtype)
+static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
+               bool persistent)
 {
-       config->n_boot_priorities = 2;
-       config->boot_priorities = talloc_realloc(config,
-                       config->boot_priorities, struct boot_priority,
-                       config->n_boot_priorities);
-       config->boot_priorities[0].type = devtype;
-       config->boot_priorities[0].priority = 0;
-       config->boot_priorities[1].type = DEVICE_TYPE_ANY;
-       config->boot_priorities[1].priority = -1;
+       config->ipmi_bootdev = bootdev;
+       config->ipmi_bootdev_persistent = persistent;
+
+       switch (bootdev) {
+       case IPMI_BOOTDEV_NONE:
+       case IPMI_BOOTDEV_DISK:
+       case IPMI_BOOTDEV_NETWORK:
+       case IPMI_BOOTDEV_CDROM:
+               break;
+       case IPMI_BOOTDEV_SETUP:
+               config->autoboot_enabled = false;
+               break;
+       case IPMI_BOOTDEV_SAFE:
+               config->autoboot_enabled = false;
+               config->safe_mode = true;
+               break;
+       }
 }
 
 static int read_bootdev_sysparam(const char *name, uint8_t *val)
@@ -613,18 +630,10 @@ static int read_bootdev_sysparam(const char *name, uint8_t *val)
 
        pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 
-       switch (buf[0]) {
-       default:
+       if (!ipmi_bootdev_is_valid(buf[0]))
                return -1;
-       case IPMI_BOOTDEV_NONE:
-       case IPMI_BOOTDEV_NETWORK:
-       case IPMI_BOOTDEV_DISK:
-       case IPMI_BOOTDEV_SAFE:
-       case IPMI_BOOTDEV_CDROM:
-       case IPMI_BOOTDEV_SETUP:
-               *val = buf[0];
-       }
 
+       *val = buf[0];
        return 0;
 }
 
@@ -668,7 +677,17 @@ static int write_bootdev_sysparam(const char *name, uint8_t val)
        return rc;
 }
 
-static void parse_opal_sysparams(struct config *config)
+static int clear_ipmi_bootdev_sysparams(
+               struct platform_powerpc *platform __attribute__((unused)))
+{
+       /* invalidate next-boot-device setting */
+       write_bootdev_sysparam("next-boot-device", 0xff);
+       return 0;
+}
+
+static int get_ipmi_bootdev_sysparams(
+               struct platform_powerpc *platform __attribute__((unused)),
+               uint8_t *bootdev, bool *persistent)
 {
        uint8_t next_bootdev, default_bootdev;
        bool next_valid, default_valid;
@@ -682,33 +701,98 @@ static void parse_opal_sysparams(struct config *config)
 
        /* nothing valid? no need to change the config */
        if (!next_valid && !default_valid)
-               return;
+               return -1;
 
-       if (!next_valid)
-               next_bootdev = default_bootdev;
+       *persistent = !next_valid;
+       *bootdev = next_valid ? next_bootdev : default_bootdev;
+       return 0;
+}
 
-       switch (next_bootdev) {
-       case IPMI_BOOTDEV_NONE:
-               return;
-       case IPMI_BOOTDEV_DISK:
-               set_exclusive_devtype(config, DEVICE_TYPE_DISK);
-               break;
-       case IPMI_BOOTDEV_NETWORK:
-               set_exclusive_devtype(config, DEVICE_TYPE_NETWORK);
-               break;
-       case IPMI_BOOTDEV_CDROM:
-               set_exclusive_devtype(config, DEVICE_TYPE_OPTICAL);
-               break;
-       case IPMI_BOOTDEV_SETUP:
-               config->autoboot_enabled = false;
-               break;
-       case IPMI_BOOTDEV_SAFE:
-               config->autoboot_enabled = false;
-               config->safe_mode = true;
-               break;
+static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform)
+{
+       uint16_t resp_len;
+       uint8_t resp[1];
+       uint8_t req[] = {
+               0x05, /* parameter selector: boot flags */
+               0x80, /* data 1: valid */
+               0x00, /* data 2: bootdev: no override */
+               0x00, /* data 3: system defaults */
+               0x00, /* data 4: no request for shared mode, mux defaults */
+               0x00, /* data 5: no instance request */
+       };
+
+       resp_len = sizeof(resp);
+
+       ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
+                       IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
+                       req, sizeof(req),
+                       resp, &resp_len,
+                       ipmi_timeout);
+       return 0;
+}
+
+static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
+               uint8_t *bootdev, bool *persistent)
+{
+       uint16_t resp_len;
+       uint8_t resp[8];
+       int rc;
+       uint8_t req[] = {
+               0x05, /* parameter selector: boot flags */
+               0x00, /* no 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)) {
+               pb_log("platform: unexpected length (%d) in "
+                               "boot options response\n", resp_len);
+               return -1;
+       }
+
+       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 options response\n", resp[0]);
+               return -1;
+       }
+
+       /* check for valid paramters */
+       if (resp[2] & 0x80) {
+               pb_debug("platform: boot options are invalid/locked\n");
+               return -1;
+       }
+
+       *persistent = false;
+
+       /* check for valid flags */
+       if (!(resp[3] & 0x80)) {
+               pb_debug("platform: boot flags are invalid, ignoring\n");
+               return 0;
+       }
+
+       *persistent = resp[3] & 0x40;
+       *bootdev = (resp[4] >> 2) & 0x0f;
+       return 0;
 }
 
+
 static int load_config(struct platform *p, struct config *config)
 {
        struct platform_powerpc *platform = to_platform_powerpc(p);
@@ -720,7 +804,15 @@ static int load_config(struct platform *p, struct config *config)
 
        populate_config(platform, config);
 
-       parse_opal_sysparams(config);
+       if (platform->get_ipmi_bootdev) {
+               bool bootdev_persistent;
+               uint8_t bootdev;
+               rc = platform->get_ipmi_bootdev(platform, &bootdev,
+                               &bootdev_persistent);
+               if (!rc && ipmi_bootdev_is_valid(bootdev)) {
+                       set_ipmi_bootdev(config, bootdev, bootdev_persistent);
+               }
+       }
 
        return 0;
 }
@@ -740,10 +832,12 @@ static int save_config(struct platform *p, struct config *config)
        return rc;
 }
 
-static void finalise_config(struct platform *platform __attribute__((unused)))
+static void pre_boot(struct platform *p, const struct config *config)
 {
-       /* invalidate next-boot-device setting */
-       write_bootdev_sysparam("next-boot-device", 0xff);
+       struct platform_powerpc *platform = to_platform_powerpc(p);
+
+       if (config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
+               platform->clear_ipmi_bootdev(platform);
 }
 
 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
@@ -785,6 +879,22 @@ static bool probe(struct platform *p, void *ctx)
        list_init(&platform->params);
 
        p->platform_data = platform;
+
+       if (ipmi_present()) {
+               pb_debug("platform: using direct IPMI for IPMI paramters\n");
+               platform->ipmi = ipmi_open(platform);
+               platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
+               platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
+
+       } else if (!stat(sysparams_dir, &statbuf)) {
+               pb_debug("platform: using sysparams for IPMI paramters\n");
+               platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
+               platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
+
+       } else {
+               pb_log("platform: no IPMI parameter support\n");
+       }
+
        return true;
 }
 
@@ -795,7 +905,7 @@ static struct platform platform_powerpc = {
        .probe                  = probe,
        .load_config            = load_config,
        .save_config            = save_config,
-       .finalise_config        = finalise_config,
+       .pre_boot               = pre_boot,
        .get_sysinfo            = get_sysinfo,
 };