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Diffstat (limited to 'include/linux/pstore_ram.h')
-rw-r--r--include/linux/pstore_ram.h50
1 files changed, 47 insertions, 3 deletions
diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h
index 602d64725222..337971c41980 100644
--- a/include/linux/pstore_ram.h
+++ b/include/linux/pstore_ram.h
@@ -22,6 +22,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/pstore.h>
#include <linux/types.h>
/*
@@ -30,6 +31,11 @@
* PRZ_FLAG_NO_LOCK is used. For all other cases, locking is required.
*/
#define PRZ_FLAG_NO_LOCK BIT(0)
+/*
+ * If a PRZ should only have a single-boot lifetime, this marks it as
+ * getting wiped after its contents get copied out after boot.
+ */
+#define PRZ_FLAG_ZAP_OLD BIT(1)
struct persistent_ram_buffer;
struct rs_control;
@@ -42,17 +48,55 @@ struct persistent_ram_ecc_info {
uint16_t *par;
};
+/**
+ * struct persistent_ram_zone - Details of a persistent RAM zone (PRZ)
+ * used as a pstore backend
+ *
+ * @paddr: physical address of the mapped RAM area
+ * @size: size of mapping
+ * @label: unique name of this PRZ
+ * @type: frontend type for this PRZ
+ * @flags: holds PRZ_FLAGS_* bits
+ *
+ * @buffer_lock:
+ * locks access to @buffer "size" bytes and "start" offset
+ * @buffer:
+ * pointer to actual RAM area managed by this PRZ
+ * @buffer_size:
+ * bytes in @buffer->data (not including any trailing ECC bytes)
+ *
+ * @par_buffer:
+ * pointer into @buffer->data containing ECC bytes for @buffer->data
+ * @par_header:
+ * pointer into @buffer->data containing ECC bytes for @buffer header
+ * (i.e. all fields up to @data)
+ * @rs_decoder:
+ * RSLIB instance for doing ECC calculations
+ * @corrected_bytes:
+ * ECC corrected bytes accounting since boot
+ * @bad_blocks:
+ * ECC uncorrectable bytes accounting since boot
+ * @ecc_info:
+ * ECC configuration details
+ *
+ * @old_log:
+ * saved copy of @buffer->data prior to most recent wipe
+ * @old_log_size:
+ * bytes contained in @old_log
+ *
+ */
struct persistent_ram_zone {
phys_addr_t paddr;
size_t size;
void *vaddr;
char *label;
- struct persistent_ram_buffer *buffer;
- size_t buffer_size;
+ enum pstore_type_id type;
u32 flags;
+
raw_spinlock_t buffer_lock;
+ struct persistent_ram_buffer *buffer;
+ size_t buffer_size;
- /* ECC correction */
char *par_buffer;
char *par_header;
struct rs_control *rs_decoder;