diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2023-10-12 21:53:48 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-10-28 06:48:02 +0300 |
| commit | 8358e8f1596b0b23d3bbc4cf5df5e5e55afc0122 (patch) | |
| tree | 51a0119f18795d5020a62a16368c4b49e4223f7d /drivers/cxl | |
| parent | 670e4e88f3b1a88a5a089be329b95c51592973ee (diff) | |
| download | linux-8358e8f1596b0b23d3bbc4cf5df5e5e55afc0122.tar.xz | |
cxl: Add support for reading CXL switch CDAT table
Add read_cdat_data() call in cxl_switch_port_probe() to allow
reading of CDAT data for CXL switches. read_cdat_data() needs
to be adjusted for the retrieving of the PCIe device depending
on if the passed in port is endpoint or switch.
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/169713682855.2205276.6418370379144967443.stgit@djiang5-mobl3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl')
| -rw-r--r-- | drivers/cxl/core/pci.c | 22 | ||||
| -rw-r--r-- | drivers/cxl/port.c | 3 |
2 files changed, 20 insertions, 5 deletions
diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c index 9321a3865c30..c86bcc181a5d 100644 --- a/drivers/cxl/core/pci.c +++ b/drivers/cxl/core/pci.c @@ -613,18 +613,30 @@ static unsigned char cdat_checksum(void *buf, size_t size) */ void read_cdat_data(struct cxl_port *port) { - struct cxl_memdev *cxlmd = to_cxl_memdev(port->uport_dev); - struct device *host = cxlmd->dev.parent; + struct device *uport = port->uport_dev; struct device *dev = &port->dev; struct pci_doe_mb *cdat_doe; + struct pci_dev *pdev = NULL; + struct cxl_memdev *cxlmd; size_t cdat_length; void *cdat_table; int rc; - if (!dev_is_pci(host)) + if (is_cxl_memdev(uport)) { + struct device *host; + + cxlmd = to_cxl_memdev(uport); + host = cxlmd->dev.parent; + if (dev_is_pci(host)) + pdev = to_pci_dev(host); + } else if (dev_is_pci(uport)) { + pdev = to_pci_dev(uport); + } + + if (!pdev) return; - cdat_doe = pci_find_doe_mailbox(to_pci_dev(host), - PCI_DVSEC_VENDOR_ID_CXL, + + cdat_doe = pci_find_doe_mailbox(pdev, PCI_DVSEC_VENDOR_ID_CXL, CXL_DOE_PROTOCOL_TABLE_ACCESS); if (!cdat_doe) { dev_dbg(dev, "No CDAT mailbox\n"); diff --git a/drivers/cxl/port.c b/drivers/cxl/port.c index 6240e05b9542..47bc8e0b8590 100644 --- a/drivers/cxl/port.c +++ b/drivers/cxl/port.c @@ -62,6 +62,9 @@ static int cxl_switch_port_probe(struct cxl_port *port) struct cxl_hdm *cxlhdm; int rc; + /* Cache the data early to ensure is_visible() works */ + read_cdat_data(port); + rc = devm_cxl_port_enumerate_dports(port); if (rc < 0) return rc; |