diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2021-10-15 14:57:27 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-10-29 11:53:51 -0700 |
| commit | a261e9a1576ab32966be907e73786282d52afb61 (patch) | |
| tree | 923f5efb64eae2082e037930175239579f109215 /drivers/cxl/cxl.h | |
| parent | 7dc7a64de2bb3daf613f4c2e809e49678c579148 (diff) | |
cxl/pci: Add @base to cxl_register_map
In addition to carrying @barno, @block_offset, and @reg_type, add @base
to keep all map/unmap parameters in one object. The helpers
cxl_{map,unmap}_regblock() handle adjusting @base to the @block_offset
at map and unmap time.
Document that @base incorporates @block_offset so that downstream
consumers of a mapped cxl_register_map instance do not need perform any
fixups / can use @base directly.
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/163433497228.889435.11271988238496181536.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxl.h')
| -rw-r--r-- | drivers/cxl/cxl.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index a6687e7fd598..5e2e93451928 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -139,7 +139,17 @@ struct cxl_device_reg_map { struct cxl_reg_map memdev; }; +/** + * struct cxl_register_map - DVSEC harvested register block mapping parameters + * @base: virtual base of the register-block-BAR + @block_offset + * @block_offset: offset to start of register block in @barno + * @reg_type: see enum cxl_regloc_type + * @barno: PCI BAR number containing the register block + * @component_map: cxl_reg_map for component registers + * @device_map: cxl_reg_maps for device registers + */ struct cxl_register_map { + void __iomem *base; u64 block_offset; u8 reg_type; u8 barno; |