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cxl/mem: Adjust ram/pmem range to represent DPA ranges 

CXL spec defines the volatile DPA range to be 0 to Volatile memory size.
It further defines the persistent DPA range to follow directly after the
end of the Volatile DPA through the persistent memory size.  Essentially

Volatile DPA range   = [0, Volatile size)
Persistent DPA range = [Volatile size, Volatile size + Persistent size)

Adjust the pmem_range start to reflect this and remote the TODO.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20210617221620.1904031-4-ira.weiny@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Ira Weiny 2021-06-17 15:16:20 -07:00 committed by Dan Williams
parent f847502ad8
commit ceeb0da0a0
1 changed files with 6 additions and 8 deletions
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14
drivers/cxl/pci.c
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@ -1441,8 +1441,9 @@ static int cxl_mem_create_range_info(struct cxl_mem *cxlm)
if (cxlm->partition_align_bytes == 0) {
cxlm->ram_range.start = 0;
cxlm->ram_range.end = cxlm->volatile_only_bytes - 1;
cxlm->pmem_range.start = 0;
cxlm->pmem_range.end = cxlm->persistent_only_bytes - 1;
cxlm->pmem_range.start = cxlm->volatile_only_bytes;
cxlm->pmem_range.end = cxlm->volatile_only_bytes +
cxlm->persistent_only_bytes - 1;
return 0;
}
@ -1466,15 +1467,12 @@ static int cxl_mem_create_range_info(struct cxl_mem *cxlm)
cxlm->next_volatile_bytes,
cxlm->next_persistent_bytes);
/*
* TODO: enumerate DPA map, as 'ram' and 'pmem' do not alias.
* For now, only the capacity is exported in sysfs
*/
cxlm->ram_range.start = 0;
cxlm->ram_range.end = cxlm->active_volatile_bytes - 1;
cxlm->pmem_range.start = 0;
cxlm->pmem_range.end = cxlm->active_persistent_bytes - 1;
cxlm->pmem_range.start = cxlm->active_volatile_bytes;
cxlm->pmem_range.end = cxlm->active_volatile_bytes +
cxlm->active_persistent_bytes - 1;
return 0;
}