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-rw-r--r--drivers/cxl/acpi.c2
-rw-r--r--drivers/cxl/core/cdat.c74
-rw-r--r--drivers/cxl/core/port.c48
-rw-r--r--drivers/cxl/cxl.h6
-rw-r--r--drivers/cxl/cxlmem.h2
5 files changed, 88 insertions, 44 deletions
diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c
index 566c387d4385..cb8c155a2c9b 100644
--- a/drivers/cxl/acpi.c
+++ b/drivers/cxl/acpi.c
@@ -529,7 +529,7 @@ static int get_genport_coordinates(struct device *dev, struct cxl_dport *dport)
if (kstrtou32(acpi_device_uid(hb), 0, &uid))
return -EINVAL;
- return acpi_get_genport_coordinates(uid, dport->hb_coord);
+ return acpi_get_genport_coordinates(uid, dport->coord);
}
static int add_host_bridge_dport(struct device *match, void *arg)
diff --git a/drivers/cxl/core/cdat.c b/drivers/cxl/core/cdat.c
index f66b493b5d3c..bb83867d9fec 100644
--- a/drivers/cxl/core/cdat.c
+++ b/drivers/cxl/core/cdat.c
@@ -14,7 +14,7 @@
struct dsmas_entry {
struct range dpa_range;
u8 handle;
- struct access_coordinate coord;
+ struct access_coordinate coord[ACCESS_COORDINATE_MAX];
int entries;
int qos_class;
@@ -88,8 +88,8 @@ static int cdat_dsmas_handler(union acpi_subtable_headers *header, void *arg,
return 0;
}
-static void cxl_access_coordinate_set(struct access_coordinate *coord,
- int access, unsigned int val)
+static void __cxl_access_coordinate_set(struct access_coordinate *coord,
+ int access, unsigned int val)
{
switch (access) {
case ACPI_HMAT_ACCESS_LATENCY:
@@ -115,6 +115,13 @@ static void cxl_access_coordinate_set(struct access_coordinate *coord,
}
}
+static void cxl_access_coordinate_set(struct access_coordinate *coord,
+ int access, unsigned int val)
+{
+ for (int i = 0; i < ACCESS_COORDINATE_MAX; i++)
+ __cxl_access_coordinate_set(&coord[i], access, val);
+}
+
static int cdat_dslbis_handler(union acpi_subtable_headers *header, void *arg,
const unsigned long end)
{
@@ -156,7 +163,7 @@ static int cdat_dslbis_handler(union acpi_subtable_headers *header, void *arg,
val = cdat_normalize(le16_to_cpu(le_val), le64_to_cpu(le_base),
dslbis->data_type);
- cxl_access_coordinate_set(&dent->coord, dslbis->data_type, val);
+ cxl_access_coordinate_set(dent->coord, dslbis->data_type, val);
return 0;
}
@@ -190,13 +197,13 @@ static int cxl_cdat_endpoint_process(struct cxl_port *port,
static int cxl_port_perf_data_calculate(struct cxl_port *port,
struct xarray *dsmas_xa)
{
- struct access_coordinate ep_c;
+ struct access_coordinate ep_c[ACCESS_COORDINATE_MAX];
struct dsmas_entry *dent;
int valid_entries = 0;
unsigned long index;
int rc;
- rc = cxl_endpoint_get_perf_coordinates(port, &ep_c);
+ rc = cxl_endpoint_get_perf_coordinates(port, ep_c);
if (rc) {
dev_dbg(&port->dev, "Failed to retrieve ep perf coordinates.\n");
return rc;
@@ -213,10 +220,11 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port,
xa_for_each(dsmas_xa, index, dent) {
int qos_class;
- cxl_coordinates_combine(&dent->coord, &dent->coord, &ep_c);
+ cxl_coordinates_combine(dent->coord, dent->coord, ep_c);
dent->entries = 1;
- rc = cxl_root->ops->qos_class(cxl_root, &dent->coord, 1,
- &qos_class);
+ rc = cxl_root->ops->qos_class(cxl_root,
+ &dent->coord[ACCESS_COORDINATE_CPU],
+ 1, &qos_class);
if (rc != 1)
continue;
@@ -233,14 +241,17 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port,
static void update_perf_entry(struct device *dev, struct dsmas_entry *dent,
struct cxl_dpa_perf *dpa_perf)
{
+ for (int i = 0; i < ACCESS_COORDINATE_MAX; i++)
+ dpa_perf->coord[i] = dent->coord[i];
dpa_perf->dpa_range = dent->dpa_range;
- dpa_perf->coord = dent->coord;
dpa_perf->qos_class = dent->qos_class;
dev_dbg(dev,
"DSMAS: dpa: %#llx qos: %d read_bw: %d write_bw %d read_lat: %d write_lat: %d\n",
dent->dpa_range.start, dpa_perf->qos_class,
- dent->coord.read_bandwidth, dent->coord.write_bandwidth,
- dent->coord.read_latency, dent->coord.write_latency);
+ dent->coord[ACCESS_COORDINATE_CPU].read_bandwidth,
+ dent->coord[ACCESS_COORDINATE_CPU].write_bandwidth,
+ dent->coord[ACCESS_COORDINATE_CPU].read_latency,
+ dent->coord[ACCESS_COORDINATE_CPU].write_latency);
}
static void cxl_memdev_set_qos_class(struct cxl_dev_state *cxlds,
@@ -477,10 +488,11 @@ static int cdat_sslbis_handler(union acpi_subtable_headers *header, void *arg,
xa_for_each(&port->dports, index, dport) {
if (dsp_id == ACPI_CDAT_SSLBIS_ANY_PORT ||
- dsp_id == dport->port_id)
- cxl_access_coordinate_set(&dport->sw_coord,
+ dsp_id == dport->port_id) {
+ cxl_access_coordinate_set(dport->coord,
sslbis->data_type,
val);
+ }
}
}
@@ -502,6 +514,21 @@ void cxl_switch_parse_cdat(struct cxl_port *port)
}
EXPORT_SYMBOL_NS_GPL(cxl_switch_parse_cdat, CXL);
+static void __cxl_coordinates_combine(struct access_coordinate *out,
+ struct access_coordinate *c1,
+ struct access_coordinate *c2)
+{
+ if (c1->write_bandwidth && c2->write_bandwidth)
+ out->write_bandwidth = min(c1->write_bandwidth,
+ c2->write_bandwidth);
+ out->write_latency = c1->write_latency + c2->write_latency;
+
+ if (c1->read_bandwidth && c2->read_bandwidth)
+ out->read_bandwidth = min(c1->read_bandwidth,
+ c2->read_bandwidth);
+ out->read_latency = c1->read_latency + c2->read_latency;
+}
+
/**
* cxl_coordinates_combine - Combine the two input coordinates
*
@@ -513,15 +540,8 @@ void cxl_coordinates_combine(struct access_coordinate *out,
struct access_coordinate *c1,
struct access_coordinate *c2)
{
- if (c1->write_bandwidth && c2->write_bandwidth)
- out->write_bandwidth = min(c1->write_bandwidth,
- c2->write_bandwidth);
- out->write_latency = c1->write_latency + c2->write_latency;
-
- if (c1->read_bandwidth && c2->read_bandwidth)
- out->read_bandwidth = min(c1->read_bandwidth,
- c2->read_bandwidth);
- out->read_latency = c1->read_latency + c2->read_latency;
+ for (int i = 0; i < ACCESS_COORDINATE_MAX; i++)
+ __cxl_coordinates_combine(&out[i], &c1[i], &c2[i]);
}
MODULE_IMPORT_NS(CXL);
@@ -558,12 +578,12 @@ void cxl_region_perf_data_calculate(struct cxl_region *cxlr,
/* Get total bandwidth and the worst latency for the cxl region */
cxlr->coord[i].read_latency = max_t(unsigned int,
cxlr->coord[i].read_latency,
- perf->coord.read_latency);
+ perf->coord[i].read_latency);
cxlr->coord[i].write_latency = max_t(unsigned int,
cxlr->coord[i].write_latency,
- perf->coord.write_latency);
- cxlr->coord[i].read_bandwidth += perf->coord.read_bandwidth;
- cxlr->coord[i].write_bandwidth += perf->coord.write_bandwidth;
+ perf->coord[i].write_latency);
+ cxlr->coord[i].read_bandwidth += perf->coord[i].read_bandwidth;
+ cxlr->coord[i].write_bandwidth += perf->coord[i].write_bandwidth;
}
}
diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
index c7c00eb373af..801c4018a1dd 100644
--- a/drivers/cxl/core/port.c
+++ b/drivers/cxl/core/port.c
@@ -2133,6 +2133,29 @@ bool schedule_cxl_memdev_detach(struct cxl_memdev *cxlmd)
}
EXPORT_SYMBOL_NS_GPL(schedule_cxl_memdev_detach, CXL);
+static void add_latency(struct access_coordinate *c, long latency)
+{
+ for (int i = 0; i < ACCESS_COORDINATE_MAX; i++) {
+ c[i].write_latency += latency;
+ c[i].read_latency += latency;
+ }
+}
+
+static void set_min_bandwidth(struct access_coordinate *c, unsigned int bw)
+{
+ for (int i = 0; i < ACCESS_COORDINATE_MAX; i++) {
+ c[i].write_bandwidth = min(c[i].write_bandwidth, bw);
+ c[i].read_bandwidth = min(c[i].read_bandwidth, bw);
+ }
+}
+
+static void set_access_coordinates(struct access_coordinate *out,
+ struct access_coordinate *in)
+{
+ for (int i = 0; i < ACCESS_COORDINATE_MAX; i++)
+ out[i] = in[i];
+}
+
static bool parent_port_is_cxl_root(struct cxl_port *port)
{
return is_cxl_root(to_cxl_port(port->dev.parent));
@@ -2149,9 +2172,15 @@ static bool parent_port_is_cxl_root(struct cxl_port *port)
int cxl_endpoint_get_perf_coordinates(struct cxl_port *port,
struct access_coordinate *coord)
{
- struct access_coordinate c = {
- .read_bandwidth = UINT_MAX,
- .write_bandwidth = UINT_MAX,
+ struct access_coordinate c[] = {
+ {
+ .read_bandwidth = UINT_MAX,
+ .write_bandwidth = UINT_MAX,
+ },
+ {
+ .read_bandwidth = UINT_MAX,
+ .write_bandwidth = UINT_MAX,
+ },
};
struct cxl_port *iter = port;
struct cxl_dport *dport;
@@ -2178,14 +2207,13 @@ int cxl_endpoint_get_perf_coordinates(struct cxl_port *port,
* have CDAT and therefore needs to be skipped.
*/
if (!is_cxl_root)
- cxl_coordinates_combine(&c, &c, &dport->sw_coord);
- c.write_latency += dport->link_latency;
- c.read_latency += dport->link_latency;
+ cxl_coordinates_combine(c, c, dport->coord);
+ add_latency(c, dport->link_latency);
} while (!is_cxl_root);
dport = iter->parent_dport;
/* Retrieve HB coords */
- cxl_coordinates_combine(&c, &c, dport->hb_coord);
+ cxl_coordinates_combine(c, c, dport->coord);
/* Get the calculated PCI paths bandwidth */
pdev = to_pci_dev(port->uport_dev->parent);
@@ -2194,10 +2222,8 @@ int cxl_endpoint_get_perf_coordinates(struct cxl_port *port,
return -ENXIO;
bw /= BITS_PER_BYTE;
- c.write_bandwidth = min(c.write_bandwidth, bw);
- c.read_bandwidth = min(c.read_bandwidth, bw);
-
- *coord = c;
+ set_min_bandwidth(c, bw);
+ set_access_coordinates(coord, c);
return 0;
}
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index ed02373ce3d9..036d17db68e0 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -663,8 +663,7 @@ struct cxl_rcrb_info {
* @rch: Indicate whether this dport was enumerated in RCH or VH mode
* @port: reference to cxl_port that contains this downstream port
* @regs: Dport parsed register blocks
- * @sw_coord: access coordinates (performance) for switch from CDAT
- * @hb_coord: access coordinates (performance) from ACPI generic port (host bridge)
+ * @coord: access coordinates (bandwidth and latency performance attributes)
* @link_latency: calculated PCIe downstream latency
*/
struct cxl_dport {
@@ -675,8 +674,7 @@ struct cxl_dport {
bool rch;
struct cxl_port *port;
struct cxl_regs regs;
- struct access_coordinate sw_coord;
- struct access_coordinate hb_coord[ACCESS_COORDINATE_MAX];
+ struct access_coordinate coord[ACCESS_COORDINATE_MAX];
long link_latency;
};
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 20fb3b35e89e..36cee9c30ceb 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -401,7 +401,7 @@ enum cxl_devtype {
*/
struct cxl_dpa_perf {
struct range dpa_range;
- struct access_coordinate coord;
+ struct access_coordinate coord[ACCESS_COORDINATE_MAX];
int qos_class;
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 23:34:33 +0000