diff options
| author | Ben Widawsky <ben.widawsky@intel.com> | 2022-02-03 07:02:06 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-02-09 09:57:32 +0300 |
| commit | 9b71e1c9c3aaae5079f5e267785b6f035c5f23da (patch) | |
| tree | ee0ac1c881f2a714a7860c7251fd26c4cdd6a0ac /drivers/cxl/port.c | |
| parent | 8aea0ef19fde030f983aba0e7ec5bcf10880a6fe (diff) | |
| download | linux-9b71e1c9c3aaae5079f5e267785b6f035c5f23da.tar.xz | |
cxl/core/port: Add endpoint decoders
Recall that a CXL Port is any object that publishes a CXL HDM Decoder
Capability structure. That is Host Bridge and Switches that have been
enabled so far. Now, add decoder support to the 'endpoint' CXL Ports
registered by the cxl_mem driver. They mostly share the same enumeration
as Bridges and Switches, but witout a target list. The target of
endpoint decode is device-internal DPA space, not another downstream
port.
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
[djbw: clarify changelog, hookup enumeration in the port driver]
Link: https://lore.kernel.org/r/164386092069.765089.14895687988217608642.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/port.c')
| -rw-r--r-- | drivers/cxl/port.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/cxl/port.c b/drivers/cxl/port.c index 4d4e23b9adff..d420da5fc39c 100644 --- a/drivers/cxl/port.c +++ b/drivers/cxl/port.c @@ -40,16 +40,17 @@ static int cxl_port_probe(struct device *dev) struct cxl_memdev *cxlmd = to_cxl_memdev(port->uport); get_device(&cxlmd->dev); - return devm_add_action_or_reset(dev, schedule_detach, cxlmd); + rc = devm_add_action_or_reset(dev, schedule_detach, cxlmd); + if (rc) + return rc; + } else { + rc = devm_cxl_port_enumerate_dports(port); + if (rc < 0) + return rc; + if (rc == 1) + return devm_cxl_add_passthrough_decoder(port); } - rc = devm_cxl_port_enumerate_dports(port); - if (rc < 0) - return rc; - - if (rc == 1) - return devm_cxl_add_passthrough_decoder(port); - cxlhdm = devm_cxl_setup_hdm(port); if (IS_ERR(cxlhdm)) return PTR_ERR(cxlhdm); |