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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2016-10-26 20:47:55 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-12-15 13:54:52 +0300
commite01aa14cf2e7ff6d39614f8087800d08ba1629b2 (patch)
tree68fb87ed70cd71bfc6a2557797508599ce434c1b /drivers/edac/edac_mc.h
parentfdaf0b3505f330b8a56ddec4e904049be998d6d1 (diff)
downloadlinux-e01aa14cf2e7ff6d39614f8087800d08ba1629b2.tar.xz
edac: move documentation from edac_mc.c to edac_core.h
Several functions are documented at edac_mc.c. As we'll be including edac_core.h at drivers-api book, move those, in order for the kernel-doc markups be part of the API documentation book. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/edac/edac_mc.h')
-rw-r--r--drivers/edac/edac_mc.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/drivers/edac/edac_mc.h b/drivers/edac/edac_mc.h
index b62d9bad9859..97ee6a91f633 100644
--- a/drivers/edac/edac_mc.h
+++ b/drivers/edac/edac_mc.h
@@ -93,24 +93,125 @@ do { \
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
+/**
+ * edac_mc_alloc: Allocate and partially fill a struct mem_ctl_info structure
+ * @mc_num: Memory controller number
+ * @n_layers: Number of MC hierarchy layers
+ * @layers: Describes each layer as seen by the Memory Controller
+ * @sz_pvt: size of private storage needed
+ *
+ *
+ * Everything is kmalloc'ed as one big chunk - more efficient.
+ * Only can be used if all structures have the same lifetime - otherwise
+ * you have to allocate and initialize your own structures.
+ *
+ * Use edac_mc_free() to free mc structures allocated by this function.
+ *
+ * .. note::
+ *
+ * drivers handle multi-rank memories in different ways: in some
+ * drivers, one multi-rank memory stick is mapped as one entry, while, in
+ * others, a single multi-rank memory stick would be mapped into several
+ * entries. Currently, this function will allocate multiple struct dimm_info
+ * on such scenarios, as grouping the multiple ranks require drivers change.
+ *
+ * Returns:
+ * On failure: NULL
+ * On success: struct mem_ctl_info pointer
+ */
struct mem_ctl_info *edac_mc_alloc(unsigned mc_num,
unsigned n_layers,
struct edac_mc_layer *layers,
unsigned sz_pvt);
+
+/**
+ * edac_mc_add_mc_with_groups: Insert the 'mci' structure into the mci
+ * global list and create sysfs entries associated with mci structure
+ * @mci: pointer to the mci structure to be added to the list
+ * @groups: optional attribute groups for the driver-specific sysfs entries
+ *
+ * Return:
+ * 0 Success
+ * !0 Failure
+ */
extern int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
const struct attribute_group **groups);
#define edac_mc_add_mc(mci) edac_mc_add_mc_with_groups(mci, NULL)
+
+/**
+ * edac_mc_free
+ * 'Free' a previously allocated 'mci' structure
+ * @mci: pointer to a struct mem_ctl_info structure
+ */
extern void edac_mc_free(struct mem_ctl_info *mci);
+
+/**
+ * edac_mc_find: Search for a mem_ctl_info structure whose index is @idx.
+ *
+ * @idx: index to be seek
+ *
+ * If found, return a pointer to the structure.
+ * Else return NULL.
+ *
+ * Caller must hold mem_ctls_mutex.
+ */
extern struct mem_ctl_info *edac_mc_find(int idx);
+
+/**
+ * find_mci_by_dev
+ *
+ * scan list of controllers looking for the one that manages
+ * the 'dev' device
+ * @dev: pointer to a struct device related with the MCI
+ */
extern struct mem_ctl_info *find_mci_by_dev(struct device *dev);
+
+/**
+ * edac_mc_del_mc: Remove sysfs entries for specified mci structure and
+ * remove mci structure from global list
+ *
+ * @dev: Pointer to struct &device representing mci structure to remove.
+ *
+ * Returns: pointer to removed mci structure, or NULL if device not found.
+ */
extern struct mem_ctl_info *edac_mc_del_mc(struct device *dev);
extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
unsigned long page);
+/**
+ * edac_raw_mc_handle_error - reports a memory event to userspace without doing
+ * anything to discover the error location
+ *
+ * @type: severity of the error (CE/UE/Fatal)
+ * @mci: a struct mem_ctl_info pointer
+ * @e: error description
+ *
+ * This raw function is used internally by edac_mc_handle_error(). It should
+ * only be called directly when the hardware error come directly from BIOS,
+ * like in the case of APEI GHES driver.
+ */
void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
struct edac_raw_error_desc *e);
+/**
+ * edac_mc_handle_error - reports a memory event to userspace
+ *
+ * @type: severity of the error (CE/UE/Fatal)
+ * @mci: a struct mem_ctl_info pointer
+ * @error_count: Number of errors of the same type
+ * @page_frame_number: mem page where the error occurred
+ * @offset_in_page: offset of the error inside the page
+ * @syndrome: ECC syndrome
+ * @top_layer: Memory layer[0] position
+ * @mid_layer: Memory layer[1] position
+ * @low_layer: Memory layer[2] position
+ * @msg: Message meaningful to the end users that
+ * explains the event
+ * @other_detail: Technical details about the event that
+ * may help hardware manufacturers and
+ * EDAC developers to analyse the event
+ */
void edac_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
const u16 error_count,