On Mon, Mar 27, 2023 at 02:46:11PM -0700, Dave Jiang wrote:
> Add debugfs output to /sys/kernel/debug/cxl/memX/qtgmap
> The debugfs attribute will dump out all the DSMAS ranges and the associated
> QTG ID exported by the CXL device CDAT.
Do you want to document these?
The poison inject & clear inflight patchset documents in:
Documentation/ABI/testing/debugfs-cxl
Alison
>
> Suggested-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
> ---
> drivers/cxl/mem.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
> index 39c4b54f0715..bf2cb5a54a7f 100644
> --- a/drivers/cxl/mem.c
> +++ b/drivers/cxl/mem.c
> @@ -45,6 +45,21 @@ static int cxl_mem_dpa_show(struct seq_file *file, void *data)
> return 0;
> }
>
> +static int cxl_mem_qtg_show(struct seq_file *file, void *data)
> +{
> + struct device *dev = file->private;
> + struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
> + struct qos_prop_entry *qos;
> +
> + list_for_each_entry(qos, &cxlmd->qos_list, list) {
> + seq_printf(file, "%08llx-%08llx : QTG ID %u\n",
> + qos->dpa_range.start, qos->dpa_range.end,
> + qos->qtg_id);
> + }
> +
> + return 0;
> +}
> +
> static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd,
> struct cxl_dport *parent_dport)
> {
> @@ -117,6 +132,7 @@ static int cxl_mem_probe(struct device *dev)
>
> dentry = cxl_debugfs_create_dir(dev_name(dev));
> debugfs_create_devm_seqfile(dev, "dpamem", dentry, cxl_mem_dpa_show);
> + debugfs_create_devm_seqfile(dev, "qtgmap", dentry, cxl_mem_qtg_show);
> rc = devm_add_action_or_reset(dev, remove_debugfs, dentry);
> if (rc)
> return rc;
>
>
