1 files changed, 126 insertions, 40 deletions

diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index d6b85f0f6082..9d9052258e92 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -59,9 +59,8 @@ struct target_cache {
 };
 
 enum {
-	NODE_ACCESS_CLASS_0 = 0,
-	NODE_ACCESS_CLASS_1,
-	NODE_ACCESS_CLASS_GENPORT_SINK,
+	NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL = ACCESS_COORDINATE_MAX,
+	NODE_ACCESS_CLASS_GENPORT_SINK_CPU,
 	NODE_ACCESS_CLASS_MAX,
 };
 
@@ -75,6 +74,7 @@ struct memory_target {
 	struct node_cache_attrs cache_attrs;
 	u8 gen_port_device_handle[ACPI_SRAT_DEVICE_HANDLE_SIZE];
 	bool registered;
+	bool ext_updated;	/* externally updated */
 };
 
 struct memory_initiator {
@@ -108,6 +108,45 @@ static struct memory_target *find_mem_target(unsigned int mem_pxm)
 	return NULL;
 }
 
+/**
+ * hmat_get_extended_linear_cache_size - Retrieve the extended linear cache size
+ * @backing_res: resource from the backing media
+ * @nid: node id for the memory region
+ * @cache_size: (Output) size of extended linear cache.
+ *
+ * Return: 0 on success. Errno on failure.
+ *
+ */
+int hmat_get_extended_linear_cache_size(struct resource *backing_res, int nid,
+					resource_size_t *cache_size)
+{
+	unsigned int pxm = node_to_pxm(nid);
+	struct memory_target *target;
+	struct target_cache *tcache;
+	struct resource *res;
+
+	target = find_mem_target(pxm);
+	if (!target)
+		return -ENOENT;
+
+	list_for_each_entry(tcache, &target->caches, node) {
+		if (tcache->cache_attrs.address_mode !=
+				NODE_CACHE_ADDR_MODE_EXTENDED_LINEAR)
+			continue;
+
+		res = &target->memregions;
+		if (!resource_contains(res, backing_res))
+			continue;
+
+		*cache_size = tcache->cache_attrs.size;
+		return 0;
+	}
+
+	*cache_size = 0;
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(hmat_get_extended_linear_cache_size, "CXL");
+
 static struct memory_target *acpi_find_genport_target(u32 uid)
 {
 	struct memory_target *target;
@@ -127,7 +166,8 @@ static struct memory_target *acpi_find_genport_target(u32 uid)
 /**
  * acpi_get_genport_coordinates - Retrieve the access coordinates for a generic port
  * @uid: ACPI unique id
- * @coord: The access coordinates written back out for the generic port
+ * @coord: The access coordinates written back out for the generic port.
+ *	   Expect 2 levels array.
  *
  * Return: 0 on success. Errno on failure.
  *
@@ -143,11 +183,14 @@ int acpi_get_genport_coordinates(u32 uid,
 	if (!target)
 		return -ENOENT;
 
-	*coord = target->coord[NODE_ACCESS_CLASS_GENPORT_SINK];
+	coord[ACCESS_COORDINATE_LOCAL] =
+		target->coord[NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL];
+	coord[ACCESS_COORDINATE_CPU] =
+		target->coord[NODE_ACCESS_CLASS_GENPORT_SINK_CPU];
 
 	return 0;
 }
-EXPORT_SYMBOL_NS_GPL(acpi_get_genport_coordinates, CXL);
+EXPORT_SYMBOL_NS_GPL(acpi_get_genport_coordinates, "CXL");
 
 static __init void alloc_memory_initiator(unsigned int cpu_pxm)
 {
@@ -325,6 +368,35 @@ static void hmat_update_target_access(struct memory_target *target,
 	}
 }
 
+int hmat_update_target_coordinates(int nid, struct access_coordinate *coord,
+				   enum access_coordinate_class access)
+{
+	struct memory_target *target;
+	int pxm;
+
+	if (nid == NUMA_NO_NODE)
+		return -EINVAL;
+
+	pxm = node_to_pxm(nid);
+	guard(mutex)(&target_lock);
+	target = find_mem_target(pxm);
+	if (!target)
+		return -ENODEV;
+
+	hmat_update_target_access(target, ACPI_HMAT_READ_LATENCY,
+				  coord->read_latency, access);
+	hmat_update_target_access(target, ACPI_HMAT_WRITE_LATENCY,
+				  coord->write_latency, access);
+	hmat_update_target_access(target, ACPI_HMAT_READ_BANDWIDTH,
+				  coord->read_bandwidth, access);
+	hmat_update_target_access(target, ACPI_HMAT_WRITE_BANDWIDTH,
+				  coord->write_bandwidth, access);
+	target->ext_updated = true;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(hmat_update_target_coordinates);
+
 static __init void hmat_add_locality(struct acpi_hmat_locality *hmat_loc)
 {
 	struct memory_locality *loc;
@@ -374,11 +446,11 @@ static __init void hmat_update_target(unsigned int tgt_pxm, unsigned int init_px
 
 	if (target && target->processor_pxm == init_pxm) {
 		hmat_update_target_access(target, type, value,
-					  NODE_ACCESS_CLASS_0);
-		/* If the node has a CPU, update access 1 */
+					  ACCESS_COORDINATE_LOCAL);
+		/* If the node has a CPU, update access ACCESS_COORDINATE_CPU */
 		if (node_state(pxm_to_node(init_pxm), N_CPU))
 			hmat_update_target_access(target, type, value,
-						  NODE_ACCESS_CLASS_1);
+						  ACCESS_COORDINATE_CPU);
 	}
 }
 
@@ -409,9 +481,9 @@ static __init int hmat_parse_locality(union acpi_subtable_headers *header,
 		return -EINVAL;
 	}
 
-	pr_info("Locality: Flags:%02x Type:%s Initiator Domains:%u Target Domains:%u Base:%lld\n",
-		hmat_loc->flags, hmat_data_type(type), ipds, tpds,
-		hmat_loc->entry_base_unit);
+	pr_debug("Locality: Flags:%02x Type:%s Initiator Domains:%u Target Domains:%u Base:%lld\n",
+		 hmat_loc->flags, hmat_data_type(type), ipds, tpds,
+		 hmat_loc->entry_base_unit);
 
 	inits = (u32 *)(hmat_loc + 1);
 	targs = inits + ipds;
@@ -422,9 +494,9 @@ static __init int hmat_parse_locality(union acpi_subtable_headers *header,
 			value = hmat_normalize(entries[init * tpds + targ],
 					       hmat_loc->entry_base_unit,
 					       type);
-			pr_info("  Initiator-Target[%u-%u]:%u%s\n",
-				inits[init], targs[targ], value,
-				hmat_data_type_suffix(type));
+			pr_debug("  Initiator-Target[%u-%u]:%u%s\n",
+				 inits[init], targs[targ], value,
+				 hmat_data_type_suffix(type));
 
 			hmat_update_target(targs[targ], inits[init],
 					   mem_hier, type, value);
@@ -452,9 +524,9 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header,
 	}
 
 	attrs = cache->cache_attributes;
-	pr_info("Cache: Domain:%u Size:%llu Attrs:%08x SMBIOS Handles:%d\n",
-		cache->memory_PD, cache->cache_size, attrs,
-		cache->number_of_SMBIOShandles);
+	pr_debug("Cache: Domain:%u Size:%llu Attrs:%08x SMBIOS Handles:%d\n",
+		 cache->memory_PD, cache->cache_size, attrs,
+		 cache->number_of_SMBIOShandles);
 
 	target = find_mem_target(cache->memory_PD);
 	if (!target)
@@ -473,6 +545,11 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header,
 	switch ((attrs & ACPI_HMAT_CACHE_ASSOCIATIVITY) >> 8) {
 	case ACPI_HMAT_CA_DIRECT_MAPPED:
 		tcache->cache_attrs.indexing = NODE_CACHE_DIRECT_MAP;
+		/* Extended Linear mode is only valid if cache is direct mapped */
+		if (cache->address_mode == ACPI_HMAT_CACHE_MODE_EXTENDED_LINEAR) {
+			tcache->cache_attrs.address_mode =
+				NODE_CACHE_ADDR_MODE_EXTENDED_LINEAR;
+		}
 		break;
 	case ACPI_HMAT_CA_COMPLEX_CACHE_INDEXING:
 		tcache->cache_attrs.indexing = NODE_CACHE_INDEXED;
@@ -513,9 +590,9 @@ static int __init hmat_parse_proximity_domain(union acpi_subtable_headers *heade
 	}
 
 	if (hmat_revision == 1)
-		pr_info("Memory (%#llx length %#llx) Flags:%04x Processor Domain:%u Memory Domain:%u\n",
-			p->reserved3, p->reserved4, p->flags, p->processor_PD,
-			p->memory_PD);
+		pr_debug("Memory (%#llx length %#llx) Flags:%04x Processor Domain:%u Memory Domain:%u\n",
+			 p->reserved3, p->reserved4, p->flags, p->processor_PD,
+			 p->memory_PD);
 	else
 		pr_info("Memory Flags:%04x Processor Domain:%u Memory Domain:%u\n",
 			p->flags, p->processor_PD, p->memory_PD);
@@ -696,8 +773,13 @@ static void hmat_update_target_attrs(struct memory_target *target,
 	u32 best = 0;
 	int i;
 
+	/* Don't update if an external agent has changed the data.  */
+	if (target->ext_updated)
+		return;
+
 	/* Don't update for generic port if there's no device handle */
-	if (access == NODE_ACCESS_CLASS_GENPORT_SINK &&
+	if ((access == NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL ||
+	     access == NODE_ACCESS_CLASS_GENPORT_SINK_CPU) &&
 	    !(*(u16 *)target->gen_port_device_handle))
 		return;
 
@@ -709,7 +791,8 @@ static void hmat_update_target_attrs(struct memory_target *target,
 	 */
 	if (target->processor_pxm != PXM_INVAL) {
 		cpu_nid = pxm_to_node(target->processor_pxm);
-		if (access == 0 || node_state(cpu_nid, N_CPU)) {
+		if (access == ACCESS_COORDINATE_LOCAL ||
+		    node_state(cpu_nid, N_CPU)) {
 			set_bit(target->processor_pxm, p_nodes);
 			return;
 		}
@@ -737,7 +820,9 @@ static void hmat_update_target_attrs(struct memory_target *target,
 		list_for_each_entry(initiator, &initiators, node) {
 			u32 value;
 
-			if (access == 1 && !initiator->has_cpu) {
+			if ((access == ACCESS_COORDINATE_CPU ||
+			     access == NODE_ACCESS_CLASS_GENPORT_SINK_CPU) &&
+			    !initiator->has_cpu) {
 				clear_bit(initiator->processor_pxm, p_nodes);
 				continue;
 			}
@@ -770,20 +855,24 @@ static void __hmat_register_target_initiators(struct memory_target *target,
 	}
 }
 
-static void hmat_register_generic_target_initiators(struct memory_target *target)
+static void hmat_update_generic_target(struct memory_target *target)
 {
 	static DECLARE_BITMAP(p_nodes, MAX_NUMNODES);
 
-	__hmat_register_target_initiators(target, p_nodes,
-					  NODE_ACCESS_CLASS_GENPORT_SINK);
+	hmat_update_target_attrs(target, p_nodes,
+				 NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL);
+	hmat_update_target_attrs(target, p_nodes,
+				 NODE_ACCESS_CLASS_GENPORT_SINK_CPU);
 }
 
 static void hmat_register_target_initiators(struct memory_target *target)
 {
 	static DECLARE_BITMAP(p_nodes, MAX_NUMNODES);
 
-	__hmat_register_target_initiators(target, p_nodes, 0);
-	__hmat_register_target_initiators(target, p_nodes, 1);
+	__hmat_register_target_initiators(target, p_nodes,
+					  ACCESS_COORDINATE_LOCAL);
+	__hmat_register_target_initiators(target, p_nodes,
+					  ACCESS_COORDINATE_CPU);
 }
 
 static void hmat_register_target_cache(struct memory_target *target)
@@ -835,7 +924,7 @@ static void hmat_register_target(struct memory_target *target)
 	 */
 	mutex_lock(&target_lock);
 	if (*(u16 *)target->gen_port_device_handle) {
-		hmat_register_generic_target_initiators(target);
+		hmat_update_generic_target(target);
 		target->registered = true;
 	}
 	mutex_unlock(&target_lock);
@@ -854,8 +943,8 @@ static void hmat_register_target(struct memory_target *target)
 	if (!target->registered) {
 		hmat_register_target_initiators(target);
 		hmat_register_target_cache(target);
-		hmat_register_target_perf(target, NODE_ACCESS_CLASS_0);
-		hmat_register_target_perf(target, NODE_ACCESS_CLASS_1);
+		hmat_register_target_perf(target, ACCESS_COORDINATE_LOCAL);
+		hmat_register_target_perf(target, ACCESS_COORDINATE_CPU);
 		target->registered = true;
 	}
 	mutex_unlock(&target_lock);
@@ -888,22 +977,19 @@ static int hmat_callback(struct notifier_block *self,
 	return NOTIFY_OK;
 }
 
-static int hmat_set_default_dram_perf(void)
+static int __init hmat_set_default_dram_perf(void)
 {
 	int rc;
 	int nid, pxm;
 	struct memory_target *target;
 	struct access_coordinate *attrs;
 
-	if (!default_dram_type)
-		return -EIO;
-
-	for_each_node_mask(nid, default_dram_type->nodes) {
+	for_each_node_mask(nid, default_dram_nodes) {
 		pxm = node_to_pxm(nid);
 		target = find_mem_target(pxm);
 		if (!target)
 			continue;
-		attrs = &target->coord[1];
+		attrs = &target->coord[ACCESS_COORDINATE_CPU];
 		rc = mt_set_default_dram_perf(nid, attrs, "ACPI HMAT");
 		if (rc)
 			return rc;
@@ -927,10 +1013,10 @@ static int hmat_calculate_adistance(struct notifier_block *self,
 		return NOTIFY_OK;
 
 	mutex_lock(&target_lock);
-	hmat_update_target_attrs(target, p_nodes, 1);
+	hmat_update_target_attrs(target, p_nodes, ACCESS_COORDINATE_CPU);
 	mutex_unlock(&target_lock);
 
-	perf = &target->coord[1];
+	perf = &target->coord[ACCESS_COORDINATE_CPU];
 
 	if (mt_perf_to_adistance(perf, adist))
 		return NOTIFY_OK;