*/
#define EDAC_MAX_LAYERS 3
-/**
- * EDAC_DIMM_OFF - Macro responsible to get a pointer offset inside a pointer
- * array for the element given by [layer0,layer1,layer2]
- * position
- *
- * @layers: a struct edac_mc_layer array, describing how many elements
- * were allocated for each layer
- * @nlayers: Number of layers at the @layers array
- * @layer0: layer0 position
- * @layer1: layer1 position. Unused if n_layers < 2
- * @layer2: layer2 position. Unused if n_layers < 3
- *
- * For 1 layer, this macro returns "var[layer0] - var";
- *
- * For 2 layers, this macro is similar to allocate a bi-dimensional array
- * and to return "var[layer0][layer1] - var";
- *
- * For 3 layers, this macro is similar to allocate a tri-dimensional array
- * and to return "var[layer0][layer1][layer2] - var".
- *
- * A loop could be used here to make it more generic, but, as we only have
- * 3 layers, this is a little faster.
- *
- * By design, layers can never be 0 or more than 3. If that ever happens,
- * a NULL is returned, causing an OOPS during the memory allocation routine,
- * with would point to the developer that he's doing something wrong.
- */
-#define EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2) ({ \
- int __i; \
- if ((nlayers) == 1) \
- __i = layer0; \
- else if ((nlayers) == 2) \
- __i = (layer1) + ((layers[1]).size * (layer0)); \
- else if ((nlayers) == 3) \
- __i = (layer2) + ((layers[2]).size * ((layer1) + \
- ((layers[1]).size * (layer0)))); \
- else \
- __i = -EINVAL; \
- __i; \
-})
-
-/**
- * EDAC_DIMM_PTR - Macro responsible to get a pointer inside a pointer array
- * for the element given by [layer0,layer1,layer2] position
- *
- * @layers: a struct edac_mc_layer array, describing how many elements
- * were allocated for each layer
- * @var: name of the var where we want to get the pointer
- * (like mci->dimms)
- * @nlayers: Number of layers at the @layers array
- * @layer0: layer0 position
- * @layer1: layer1 position. Unused if n_layers < 2
- * @layer2: layer2 position. Unused if n_layers < 3
- *
- * For 1 layer, this macro returns "var[layer0]";
- *
- * For 2 layers, this macro is similar to allocate a bi-dimensional array
- * and to return "var[layer0][layer1]";
- *
- * For 3 layers, this macro is similar to allocate a tri-dimensional array
- * and to return "var[layer0][layer1][layer2]";
- */
-#define EDAC_DIMM_PTR(layers, var, nlayers, layer0, layer1, layer2) ({ \
- typeof(*var) __p; \
- int ___i = EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2); \
- if (___i < 0) \
- __p = NULL; \
- else \
- __p = (var)[___i]; \
- __p; \
-})
-
struct dimm_info {
struct device dev;
unsigned int location[EDAC_MAX_LAYERS];
struct mem_ctl_info *mci; /* the parent */
+ unsigned int idx; /* index within the parent dimm array */
u32 grain; /* granularity of reported error in bytes */
enum dev_type dtype; /* memory device type */
* (typically, a memory controller error)
*/
struct edac_raw_error_desc {
- /*
- * NOTE: everything before grain won't be cleaned by
- * edac_raw_error_desc_clean()
- */
char location[LOCATION_SIZE];
char label[(EDAC_MC_LABEL_LEN + 1 + sizeof(OTHER_LABEL)) * EDAC_MAX_LABELS];
long grain;
- /* the vars below and grain will be cleaned on every new error report */
u16 error_count;
int top_layer;
int mid_layer;
bool fake_inject_ue;
u16 fake_inject_count;
};
-#endif
+
+#define mci_for_each_dimm(mci, dimm) \
+ for ((dimm) = (mci)->dimms[0]; \
+ (dimm); \
+ (dimm) = (dimm)->idx + 1 < (mci)->tot_dimms \
+ ? (mci)->dimms[(dimm)->idx + 1] \
+ : NULL)
+
+/**
+ * edac_get_dimm_by_index - Get DIMM info at @index from a memory
+ * controller
+ *
+ * @mci: MC descriptor struct mem_ctl_info
+ * @index: index in the memory controller's DIMM array
+ *
+ * Returns a struct dimm_info * or NULL on failure.
+ */
+static inline struct dimm_info *
+edac_get_dimm_by_index(struct mem_ctl_info *mci, int index)
+{
+ if (index < 0 || index >= mci->tot_dimms)
+ return NULL;
+
+ if (WARN_ON_ONCE(mci->dimms[index]->idx != index))
+ return NULL;
+
+ return mci->dimms[index];
+}
+
+/**
+ * edac_get_dimm - Get DIMM info from a memory controller given by
+ * [layer0,layer1,layer2] position
+ *
+ * @mci: MC descriptor struct mem_ctl_info
+ * @layer0: layer0 position
+ * @layer1: layer1 position. Unused if n_layers < 2
+ * @layer2: layer2 position. Unused if n_layers < 3
+ *
+ * For 1 layer, this function returns "dimms[layer0]";
+ *
+ * For 2 layers, this function is similar to allocating a two-dimensional
+ * array and returning "dimms[layer0][layer1]";
+ *
+ * For 3 layers, this function is similar to allocating a tri-dimensional
+ * array and returning "dimms[layer0][layer1][layer2]";
+ */
+static inline struct dimm_info *edac_get_dimm(struct mem_ctl_info *mci,
+ int layer0, int layer1, int layer2)
+{
+ int index;
+
+ if (layer0 < 0
+ || (mci->n_layers > 1 && layer1 < 0)
+ || (mci->n_layers > 2 && layer2 < 0))
+ return NULL;
+
+ index = layer0;
+
+ if (mci->n_layers > 1)
+ index = index * mci->layers[1].size + layer1;
+
+ if (mci->n_layers > 2)
+ index = index * mci->layers[2].size + layer2;
+
+ return edac_get_dimm_by_index(mci, index);
+}
+#endif /* _LINUX_EDAC_H_ */
projects / linux.git / blobdiff