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ndctl/0178-cxl-list-Add-DPA-span-...

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From bbc0da95d12b3c890cc323a34b48cf489d4b467a Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Thu, 14 Jul 2022 10:02:09 -0700
Subject: [PATCH 178/217] cxl/list: Add DPA span to endpoint decoder listings
Optionally include in decoder listings the device local address space for
endpoint decoders with active / allocated capacity.
Link: https://lore.kernel.org/r/165781812967.1555691.4685129673233918478.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
Documentation/cxl/lib/libcxl.txt | 2 ++
cxl/json.c | 18 +++++++++++++
cxl/lib/libcxl.c | 43 +++++++++++++++++++++++++++++++-
cxl/lib/libcxl.sym | 6 +++++
cxl/lib/private.h | 2 ++
cxl/libcxl.h | 2 ++
6 files changed, 72 insertions(+), 1 deletion(-)
diff --git a/Documentation/cxl/lib/libcxl.txt b/Documentation/cxl/lib/libcxl.txt
index f8f0e66..2aef489 100644
--- a/Documentation/cxl/lib/libcxl.txt
+++ b/Documentation/cxl/lib/libcxl.txt
@@ -392,6 +392,8 @@ more CXL decoder objects.
----
unsigned long long cxl_decoder_get_resource(struct cxl_decoder *decoder);
unsigned long long cxl_decoder_get_size(struct cxl_decoder *decoder);
+unsigned long long cxl_decoder_get_dpa_resource(struct cxl_decoder *decoder);
+unsigned long long cxl_decoder_get_dpa_size(struct cxl_decoder *decoder);
const char *cxl_decoder_get_devname(struct cxl_decoder *decoder);
int cxl_decoder_get_id(struct cxl_decoder *decoder);
int cxl_decoder_get_nr_targets(struct cxl_decoder *decoder);
diff --git a/cxl/json.c b/cxl/json.c
index a213fda..3f52d3b 100644
--- a/cxl/json.c
+++ b/cxl/json.c
@@ -472,6 +472,24 @@ struct json_object *util_cxl_decoder_to_json(struct cxl_decoder *decoder,
json_object_object_add(jdecoder, "state", jobj);
}
+ if (cxl_port_is_endpoint(port)) {
+ size = cxl_decoder_get_dpa_size(decoder);
+ val = cxl_decoder_get_dpa_resource(decoder);
+ if (size && val < ULLONG_MAX) {
+ jobj = util_json_object_hex(val, flags);
+ if (jobj)
+ json_object_object_add(jdecoder, "dpa_resource",
+ jobj);
+ }
+
+ if (size && size < ULLONG_MAX) {
+ jobj = util_json_object_size(size, flags);
+ if (jobj)
+ json_object_object_add(jdecoder, "dpa_size",
+ jobj);
+ }
+ }
+
if (cxl_port_is_root(port) && cxl_decoder_is_mem_capable(decoder)) {
if (cxl_decoder_is_pmem_capable(decoder)) {
jobj = json_object_new_boolean(true);
diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index bf3568d..6f4d64d 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -956,8 +956,19 @@ static void *add_cxl_decoder(void *parent, int id, const char *cxldecoder_base)
decoder->size = strtoull(buf, NULL, 0);
switch (port->type) {
- case CXL_PORT_SWITCH:
case CXL_PORT_ENDPOINT:
+ sprintf(path, "%s/dpa_resource", cxldecoder_base);
+ if (sysfs_read_attr(ctx, path, buf) < 0)
+ decoder->dpa_resource = ULLONG_MAX;
+ else
+ decoder->dpa_resource = strtoull(buf, NULL, 0);
+ sprintf(path, "%s/dpa_size", cxldecoder_base);
+ if (sysfs_read_attr(ctx, path, buf) < 0)
+ decoder->dpa_size = ULLONG_MAX;
+ else
+ decoder->dpa_size = strtoull(buf, NULL, 0);
+
+ case CXL_PORT_SWITCH:
decoder->pmem_capable = true;
decoder->volatile_capable = true;
decoder->mem_capable = true;
@@ -1114,6 +1125,36 @@ CXL_EXPORT unsigned long long cxl_decoder_get_size(struct cxl_decoder *decoder)
return decoder->size;
}
+CXL_EXPORT unsigned long long
+cxl_decoder_get_dpa_resource(struct cxl_decoder *decoder)
+{
+ struct cxl_port *port = cxl_decoder_get_port(decoder);
+ struct cxl_ctx *ctx = cxl_decoder_get_ctx(decoder);
+
+ if (!cxl_port_is_endpoint(port)) {
+ err(ctx, "%s: not an endpoint decoder\n",
+ cxl_decoder_get_devname(decoder));
+ return ULLONG_MAX;
+ }
+
+ return decoder->dpa_resource;
+}
+
+CXL_EXPORT unsigned long long
+cxl_decoder_get_dpa_size(struct cxl_decoder *decoder)
+{
+ struct cxl_port *port = cxl_decoder_get_port(decoder);
+ struct cxl_ctx *ctx = cxl_decoder_get_ctx(decoder);
+
+ if (!cxl_port_is_endpoint(port)) {
+ err(ctx, "%s: not an endpoint decoder\n",
+ cxl_decoder_get_devname(decoder));
+ return ULLONG_MAX;
+ }
+
+ return decoder->dpa_size;
+}
+
CXL_EXPORT enum cxl_decoder_target_type
cxl_decoder_get_target_type(struct cxl_decoder *decoder)
{
diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
index dffcb60..8e2fc75 100644
--- a/cxl/lib/libcxl.sym
+++ b/cxl/lib/libcxl.sym
@@ -167,3 +167,9 @@ global:
cxl_cmd_new_set_partition;
cxl_cmd_partition_set_mode;
} LIBCXL_1;
+
+LIBCXL_3 {
+global:
+ cxl_decoder_get_dpa_resource;
+ cxl_decoder_get_dpa_size;
+} LIBCXL_2;
diff --git a/cxl/lib/private.h b/cxl/lib/private.h
index c6d88f7..24a2ae6 100644
--- a/cxl/lib/private.h
+++ b/cxl/lib/private.h
@@ -101,6 +101,8 @@ struct cxl_decoder {
struct cxl_ctx *ctx;
u64 start;
u64 size;
+ u64 dpa_resource;
+ u64 dpa_size;
void *dev_buf;
size_t buf_len;
char *dev_path;
diff --git a/cxl/libcxl.h b/cxl/libcxl.h
index 0007f4d..76aebe3 100644
--- a/cxl/libcxl.h
+++ b/cxl/libcxl.h
@@ -129,6 +129,8 @@ struct cxl_decoder *cxl_decoder_get_first(struct cxl_port *port);
struct cxl_decoder *cxl_decoder_get_next(struct cxl_decoder *decoder);
unsigned long long cxl_decoder_get_resource(struct cxl_decoder *decoder);
unsigned long long cxl_decoder_get_size(struct cxl_decoder *decoder);
+unsigned long long cxl_decoder_get_dpa_resource(struct cxl_decoder *decoder);
+unsigned long long cxl_decoder_get_dpa_size(struct cxl_decoder *decoder);
const char *cxl_decoder_get_devname(struct cxl_decoder *decoder);
struct cxl_target *cxl_decoder_get_target_by_memdev(struct cxl_decoder *decoder,
struct cxl_memdev *memdev);
--
2.27.0
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