diff options
| author | Robert Richter <rrichter@amd.com> | 2023-06-25 21:35:20 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-06-25 21:35:20 +0300 |
| commit | eb4663b07e13bc138aad9e2a93ee9893c7139f51 (patch) | |
| tree | f8903bf827b833244a8e5b25974590bc7be9637a /drivers/cxl/mem.c | |
| parent | 858fd168a95c5b9669aac8db6c14a9aeab446375 (diff) | |
| download | linux-eb4663b07e13bc138aad9e2a93ee9893c7139f51.tar.xz | |
cxl/acpi: Probe RCRB later during RCH downstream port creation
The RCRB is extracted already during ACPI CEDT table parsing while the
data of this is needed not earlier than dport creation. This
implementation comes with drawbacks: During ACPI table scan there is
already MMIO access including mapping and unmapping, but only ACPI
data should be collected here. The collected data must be transferred
through a couple of interfaces until it is finally consumed when
creating the dport. This causes complex data structures and function
interfaces. Additionally, RCRB parsing will be extended to also
extract AER data, it would be much easier do this at a later point
during port and dport creation when the data structures are available
to hold that data.
To simplify all that, probe the RCRB at a later point during RCH
downstream port creation. Change ACPI table parser to only extract the
base address of either the component registers or the RCRB. Parse and
extract the RCRB in devm_cxl_add_rch_dport().
This is in preparation to centralize all RCRB scanning.
Signed-off-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20230622205523.85375-2-terry.bowman@amd.com
Co-developed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20230622205523.85375-3-terry.bowman@amd.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/mem.c')
| -rw-r--r-- | drivers/cxl/mem.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c index 519edd0eb196..45d4c32d78b0 100644 --- a/drivers/cxl/mem.c +++ b/drivers/cxl/mem.c @@ -72,8 +72,8 @@ static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd, * typical register locator mechanism. */ if (parent_dport->rch && cxlds->component_reg_phys == CXL_RESOURCE_NONE) - component_reg_phys = cxl_rcrb_to_component( - &cxlmd->dev, parent_dport->rcrb, CXL_RCRB_UPSTREAM); + component_reg_phys = + cxl_rcd_component_reg_phys(&cxlmd->dev, parent_dport); else component_reg_phys = cxlds->component_reg_phys; endpoint = devm_cxl_add_port(host, &cxlmd->dev, component_reg_phys, |