powerpc/powernv: Add interfaces for flash device access

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / platforms / powernv / opal.c

diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index b0021ac3e0a8cb9c4edddaff180043394f20c915..2241565b0739ff3bc6dc84f9bc6c63c70edf8b8c 100644 (file)
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -305,7 +305,7 @@ void opal_notifier_disable(void)
  * Opal message notifier based on message type. Allow subscribers to get
  * notified for specific messgae type.
  */
-int opal_message_notifier_register(enum OpalMessageType msg_type,
+int opal_message_notifier_register(enum opal_msg_type msg_type,
                                        struct notifier_block *nb)
 {
        if (!nb || msg_type >= OPAL_MSG_TYPE_MAX) {
@@ -318,6 +318,13 @@ int opal_message_notifier_register(enum OpalMessageType msg_type,
                                &opal_msg_notifier_head[msg_type], nb);
 }
 
+int opal_message_notifier_unregister(enum opal_msg_type msg_type,
+                                    struct notifier_block *nb)
+{
+       return atomic_notifier_chain_unregister(
+                       &opal_msg_notifier_head[msg_type], nb);
+}
+
 static void opal_message_do_notify(uint32_t msg_type, void *msg)
 {
        /* notify subscribers */
@@ -664,6 +671,9 @@ static void __init opal_dump_region_init(void)
        uint64_t size;
        int rc;
 
+       if (!opal_check_token(OPAL_REGISTER_DUMP_REGION))
+               return;
+
        /* Register kernel log buffer */
        addr = log_buf_addr_get();
        if (addr == NULL)
@@ -683,6 +693,15 @@ static void __init opal_dump_region_init(void)
                        "rc = %d\n", rc);
 }
 
+static void opal_flash_init(struct device_node *opal_node)
+{
+       struct device_node *np;
+
+       for_each_child_of_node(opal_node, np)
+               if (of_device_is_compatible(np, "ibm,opal-flash"))
+                       of_platform_device_create(np, NULL, NULL);
+}
+
 static void opal_ipmi_init(struct device_node *opal_node)
 {
        struct device_node *np;
@@ -807,7 +826,7 @@ static int __init opal_init(void)
                /* Setup error log interface */
                rc = opal_elog_init();
                /* Setup code update interface */
-               opal_flash_init();
+               opal_flash_update_init();
                /* Setup platform dump extract interface */
                opal_platform_dump_init();
                /* Setup system parameters interface */
@@ -819,6 +838,8 @@ static int __init opal_init(void)
        /* Initialize OPAL IPMI backend */
        opal_ipmi_init(opal_node);
 
+       opal_flash_init(opal_node);
+
        return 0;
 }
 machine_subsys_initcall(powernv, opal_init);
@@ -849,13 +870,17 @@ void opal_shutdown(void)
        }
 
        /* Unregister memory dump region */
-       opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF);
+       if (opal_check_token(OPAL_UNREGISTER_DUMP_REGION))
+               opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF);
 }
 
 /* Export this so that test modules can use it */
 EXPORT_SYMBOL_GPL(opal_invalid_call);
 EXPORT_SYMBOL_GPL(opal_ipmi_send);
 EXPORT_SYMBOL_GPL(opal_ipmi_recv);
+EXPORT_SYMBOL_GPL(opal_flash_read);
+EXPORT_SYMBOL_GPL(opal_flash_write);
+EXPORT_SYMBOL_GPL(opal_flash_erase);
 
 /* Convert a region of vmalloc memory to an opal sg list */
 struct opal_sg_list *opal_vmalloc_to_sg_list(void *vmalloc_addr,
@@ -920,6 +945,25 @@ void opal_free_sg_list(struct opal_sg_list *sg)
        }
 }
 
+int opal_error_code(int rc)
+{
+       switch (rc) {
+       case OPAL_SUCCESS:              return 0;
+
+       case OPAL_PARAMETER:            return -EINVAL;
+       case OPAL_ASYNC_COMPLETION:     return -EINPROGRESS;
+       case OPAL_BUSY_EVENT:           return -EBUSY;
+       case OPAL_NO_MEM:               return -ENOMEM;
+
+       case OPAL_UNSUPPORTED:          return -EIO;
+       case OPAL_HARDWARE:             return -EIO;
+       case OPAL_INTERNAL_ERROR:       return -EIO;
+       default:
+               pr_err("%s: unexpected OPAL error %d\n", __func__, rc);
+               return -EIO;
+       }
+}
+
 EXPORT_SYMBOL_GPL(opal_poll_events);
 EXPORT_SYMBOL_GPL(opal_rtc_read);
 EXPORT_SYMBOL_GPL(opal_rtc_write);