System and method for determining available post-package repair resources

A method, comprising:

• coupling a dual in-line memory module (DIMM) of an information handling system to a memory controller of the information handling system, wherein the DIMM includes a memory storage device and a post-package repair (PPR) module, the memory storage device arranged in a plurality of rows including data rows and redundant rows, the PPR module configured to remap an address within the DIMM physical address space from a data row to a redundant row;
• determining, by the memory controller, an exact number of un-remapped redundant rows;
• providing, by the memory storage device, an indication that indicates that a number of un-remapped redundant rows is equal to zero when the indication is in a first state, that indicates that the number of un-remapped redundant rows is greater than or equal to one when the indication is in a second state, and that does not otherwise indicate the exact number of un-remapped redundant rows;
• in determining the exact number of un-remapped redundant rows:
• writing, by the memory controller, a pre-determined data pattern to the data rows;
• selecting a first data row;
• directing the PPR module to remap the first data row to a first redundant row;
• reading the first data row;
• and
• determining if the contents of the first data row include the pre-determined data pattern;
• and
• when the contents of the first data row do not include the pre-determined data pattern:
• writing, by the memory controller, a first redundant row count pattern to the first data row;
• and
• incrementing a redundant row counter to indicate a first detection of a first un-remapped redundant row.

A memory controller, comprising:

• a memory interface communicatively coupled to a dual in-line memory module (DIMM) including a memory having a plurality of data rows and a plurality of redundant rows, the DIMM further including a post-package repair (PPR) module configured to remap an address within the DIMM physical address space from one of the data rows to one of the redundant rows;
• and
• a redundant row detection module configured to determine an exact number of un-remapped redundant rows, wherein, in determining the exact number of un-remapped redundant rows, the redundant row detection module is further configured to:
• direct the memory controller to write a pre-determined data pattern to the data rows;
• select a first data row;
• direct the PPR module to remap the first data row to a first redundant row;
• direct the memory controller to read the first data row;
• determine if the contents of the first data row include the pre-determined data pattern;
• direct the memory controller to write a first redundant row count pattern to the first data row;
• and
• increment a redundant row counter to indicate a first detection of a first un-remapped redundant row.