From: Dave Jiang <dave.jiang@intel.com>
To: linux-cxl@vger.kernel.org, linux-acpi@vger.kernel.org
Cc: dan.j.williams@intel.com, ira.weiny@intel.com,
vishal.l.verma@intel.com, alison.schofield@intel.com,
rafael@kernel.org, lukas@wunner.de
Subject: [PATCH v2 19/21] cxl: Store QTG IDs and related info to the CXL memory device context
Date: Mon, 27 Mar 2023 14:46:00 -0700 [thread overview]
Message-ID: <167995356029.2857312.4374564094571467987.stgit@djiang5-mobl3> (raw)
In-Reply-To: <167995336797.2857312.539473939839316778.stgit@djiang5-mobl3>
Once the QTG ID _DSM is executed successfully, the QTG ID is retrieved from
the return package. Create a list of entries in the cxl_memdev context and
store the QTG ID and the associated DPA range. This information can be
exposed to user space via sysfs in order to help region setup for
hot-plugged CXL memory devices.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/cxl/core/memdev.c | 1 +
drivers/cxl/cxlmem.h | 14 ++++++++++++++
drivers/cxl/port.c | 19 +++++++++++++++++++
3 files changed, 34 insertions(+)
diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index 28a05f2fe32d..d2605fc39240 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -346,6 +346,7 @@ struct cxl_memdev *devm_cxl_add_memdev(struct cxl_dev_state *cxlds)
*/
cxlmd->cxlds = cxlds;
cxlds->cxlmd = cxlmd;
+ INIT_LIST_HEAD(&cxlmd->qos_list);
cdev = &cxlmd->cdev;
rc = cdev_device_add(cdev, dev);
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 001dabf0231b..c8b8d4865e49 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -40,6 +40,7 @@
* @cxl_nvd: optional bridge to an nvdimm if the device supports pmem
* @id: id number of this memdev instance.
* @depth: endpoint port depth
+ * @qos_list: QTG ID related list of entries
*/
struct cxl_memdev {
struct device dev;
@@ -50,6 +51,7 @@ struct cxl_memdev {
struct cxl_nvdimm *cxl_nvd;
int id;
int depth;
+ struct list_head qos_list;
};
static inline struct cxl_memdev *to_cxl_memdev(struct device *dev)
@@ -215,6 +217,18 @@ struct cxl_event_state {
struct mutex log_lock;
};
+/**
+ * struct qos_prop - QoS property entry
+ * @list - list entry
+ * @dpa_range - range for DPA address
+ * @qtg_id - QoS Throttling Group ID
+ */
+struct qos_prop_entry {
+ struct list_head list;
+ struct range dpa_range;
+ u16 qtg_id;
+};
+
/**
* struct cxl_dev_state - The driver device state
*
diff --git a/drivers/cxl/port.c b/drivers/cxl/port.c
index f6646d91ae26..4e7e22c13790 100644
--- a/drivers/cxl/port.c
+++ b/drivers/cxl/port.c
@@ -124,6 +124,22 @@ static int cxl_port_qos_calculate(struct cxl_port *port,
return 0;
}
+static void cxl_memdev_set_qtg(struct cxl_memdev *cxlmd, struct list_head *dsmas_list)
+{
+ struct dsmas_entry *dent;
+ struct qos_prop_entry *qos;
+
+ list_for_each_entry(dent, dsmas_list, list) {
+ qos = devm_kzalloc(&cxlmd->dev, sizeof(*qos), GFP_KERNEL);
+ if (!qos)
+ return;
+
+ qos->dpa_range = dent->dpa_range;
+ qos->qtg_id = dent->qtg_id;
+ list_add_tail(&qos->list, &cxlmd->qos_list);
+ }
+}
+
static int cxl_switch_port_probe(struct cxl_port *port)
{
struct cxl_hdm *cxlhdm;
@@ -212,6 +228,7 @@ static int cxl_port_probe(struct device *dev)
read_cdat_data(port);
if (port->cdat.table) {
if (is_cxl_endpoint(port)) {
+ struct cxl_memdev *cxlmd = to_cxl_memdev(port->uport);
LIST_HEAD(dsmas_list);
rc = cdat_table_parse_dsmas(port->cdat.table,
@@ -230,6 +247,8 @@ static int cxl_port_probe(struct device *dev)
rc = cxl_port_qos_calculate(port, &dsmas_list);
if (rc)
dev_dbg(dev, "Failed to do QoS calculations\n");
+
+ cxl_memdev_set_qtg(cxlmd, &dsmas_list);
dsmas_list_destroy(&dsmas_list);
} else {
rc = cdat_table_parse_sslbis(port->cdat.table,
next prev parent reply other threads:[~2023-03-27 21:47 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-27 21:44 [PATCH v2 00/21] cxl: Add support for QTG ID retrieval for CXL subsystem Dave Jiang
2023-03-27 21:44 ` [PATCH v2 01/21] cxl: Export QTG ids from CFMWS to sysfs Dave Jiang
2023-03-29 23:57 ` Ira Weiny
2023-03-27 21:44 ` [PATCH v2 02/21] cxl: Add checksum verification to CDAT from CXL Dave Jiang
2023-03-29 0:03 ` Alison Schofield
2023-03-29 0:21 ` Dave Jiang
2023-03-30 0:09 ` Ira Weiny
2023-03-27 21:44 ` [PATCH v2 03/21] cxl: Add support for reading CXL switch CDAT table Dave Jiang
2023-03-30 0:19 ` Ira Weiny
2023-03-27 21:44 ` [PATCH v2 04/21] cxl: Add common helpers for cdat parsing Dave Jiang
2023-03-27 21:44 ` [PATCH v2 05/21] cxl: Add callback to parse the DSMAS subtables from CDAT Dave Jiang
2023-03-29 0:20 ` Alison Schofield
2023-03-29 20:41 ` Dave Jiang
2023-03-30 15:43 ` Dave Jiang
2023-03-27 21:44 ` [PATCH v2 06/21] cxl: Add callback to parse the DSLBIS subtable " Dave Jiang
2023-03-29 0:44 ` Alison Schofield
2023-03-29 20:59 ` Dave Jiang
2023-03-29 21:59 ` Alison Schofield
2023-03-27 21:44 ` [PATCH v2 07/21] cxl: Add callback to parse the SSLBIS " Dave Jiang
2023-03-27 21:44 ` [PATCH v2 08/21] cxl: Add support for _DSM Function for retrieving QTG ID Dave Jiang
2023-03-27 21:44 ` [PATCH v2 09/21] cxl: Add helper function to retrieve ACPI handle of CXL root device Dave Jiang
2023-03-27 21:45 ` [PATCH v2 10/21] cxl: Add helpers to calculate pci latency for the CXL device Dave Jiang
2023-03-27 21:45 ` [PATCH v2 11/21] cxl: Add helper function that calculates QoS values for switches Dave Jiang
2023-03-27 21:45 ` [PATCH v2 12/21] cxl: Add helper function that calculate QoS values for PCI path Dave Jiang
2023-03-27 21:45 ` [PATCH v2 13/21] ACPI: NUMA: Add genport target allocation to the HMAT parsing Dave Jiang
2023-03-27 21:45 ` [PATCH v2 14/21] ACPI: NUMA: Add helper function to retrieve the performance attributes Dave Jiang
2023-03-27 21:45 ` [PATCH v2 15/21] cxl: Add helper function to retrieve generic port QoS Dave Jiang
2023-03-27 21:45 ` [PATCH v2 16/21] cxl: Add latency and bandwidth calculations for the CXL path Dave Jiang
2023-03-27 21:45 ` [PATCH v2 17/21] cxl: Wait Memory_Info_Valid before access memory related info Dave Jiang
2023-03-27 21:45 ` [PATCH v2 18/21] cxl: Move identify and partition query from pci probe to port probe Dave Jiang
2023-03-27 21:46 ` Dave Jiang [this message]
2023-03-27 21:46 ` [PATCH v2 20/21] cxl: Export sysfs attributes for memory device QTG ID Dave Jiang
2023-03-29 1:27 ` Alison Schofield
2023-03-29 21:44 ` Dave Jiang
2023-03-29 21:55 ` Dan Williams
2023-03-29 22:02 ` Dave Jiang
2023-03-27 21:46 ` [PATCH v2 21/21] cxl/mem: Add debugfs output for QTG related data Dave Jiang
2023-03-29 1:13 ` Alison Schofield
2023-03-29 21:49 ` Dave Jiang
2023-03-28 17:45 ` [PATCH v2 00/21] cxl: Add support for QTG ID retrieval for CXL subsystem Dave Jiang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=167995356029.2857312.4374564094571467987.stgit@djiang5-mobl3 \
--to=dave.jiang@intel.com \
--cc=alison.schofield@intel.com \
--cc=dan.j.williams@intel.com \
--cc=ira.weiny@intel.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-cxl@vger.kernel.org \
--cc=lukas@wunner.de \
--cc=rafael@kernel.org \
--cc=vishal.l.verma@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).