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| author |  Dan Williams <dan.j.williams@intel.com>
| 2023-04-14 11:54:16 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com>
| 2023-04-18 10:32:47 -0700 |
| commit | c841ecd8277154c9297dd9ac959494f6deb61e76 (patch) | |
| tree | 920314a4d9590a6597ce736b266cbdbcadf180e8 /drivers/cxl | |
| parent | cxl/port: Scan single-target ports for decoders (diff) | |
| download | linux-c841ecd8277154c9297dd9ac959494f6deb61e76.tar.gz linux-c841ecd8277154c9297dd9ac959494f6deb61e76.tar.bz2 linux-c841ecd8277154c9297dd9ac959494f6deb61e76.zip | |
cxl/hdm: Add more HDM decoder debug messages at startup
A recent debug session yielded a couple debug messages that were useful
for determining the reason why the driver was or was not falling back
to CXL range register emulation, and for identifying decoder setting
enumeration problems.
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://lore.kernel.org/r/168149845668.792294.11814353796371419167.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl')
| -rw-r--r-- | drivers/cxl/core/hdm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c index abe3877cfa63..7889ff203a34 100644 --- a/drivers/cxl/core/hdm.c +++ b/drivers/cxl/core/hdm.c @@ -130,6 +130,14 @@ static bool should_emulate_decoders(struct cxl_endpoint_dvsec_info *info) */ for (i = 0; i < cxlhdm->decoder_count; i++) { ctrl = readl(hdm + CXL_HDM_DECODER0_CTRL_OFFSET(i)); + dev_dbg(&info->port->dev, + "decoder%d.%d: committed: %ld base: %#x_%.8x size: %#x_%.8x\n", + info->port->id, i, + FIELD_GET(CXL_HDM_DECODER0_CTRL_COMMITTED, ctrl), + readl(hdm + CXL_HDM_DECODER0_BASE_HIGH_OFFSET(i)), + readl(hdm + CXL_HDM_DECODER0_BASE_LOW_OFFSET(i)), + readl(hdm + CXL_HDM_DECODER0_SIZE_HIGH_OFFSET(i)), + readl(hdm + CXL_HDM_DECODER0_SIZE_LOW_OFFSET(i))); if (FIELD_GET(CXL_HDM_DECODER0_CTRL_COMMITTED, ctrl)) return false; } @@ -868,6 +876,10 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld, if (rc) return rc; + dev_dbg(&port->dev, "decoder%d.%d: range: %#llx-%#llx iw: %d ig: %d\n", + port->id, cxld->id, cxld->hpa_range.start, cxld->hpa_range.end, + cxld->interleave_ways, cxld->interleave_granularity); + if (!info) { lo = readl(hdm + CXL_HDM_DECODER0_TL_LOW(which)); hi = readl(hdm + CXL_HDM_DECODER0_TL_HIGH(which)); |