[PATCH v9 06/10] powerpc/powernv: Core IMC events detection

[Anju T Sudhakar]

From: Madhavan Srinivasan <maddy@xxxxxxxxxxxxxxxxxx>                            
                                                                                
This patch adds support for detection of core IMC events along with the         
Nest IMC events. It adds a new domain IMC_DOMAIN_CORE and its determined        
with the help of the "type" property in the IMC device tree.                    
                                                                                
Signed-off-by: Anju T Sudhakar <anju@xxxxxxxxxxxxxxxxxx>                        
Signed-off-by: Hemant Kumar <hemant@xxxxxxxxxxxxxxxxxx>                         
Signed-off-by: Madhavan Srinivasan <maddy@xxxxxxxxxxxxxxxxxx>   
---
 arch/powerpc/include/asm/imc-pmu.h        |  2 ++
 arch/powerpc/include/asm/opal-api.h       |  3 +++
 arch/powerpc/perf/imc-pmu.c               |  4 ++++
 arch/powerpc/platforms/powernv/opal-imc.c | 19 ++++++++++++++++---
 4 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/imc-pmu.h b/arch/powerpc/include/asm/imc-pmu.h
index 6b1d887..54784a5 100644
--- a/arch/powerpc/include/asm/imc-pmu.h
+++ b/arch/powerpc/include/asm/imc-pmu.h
@@ -95,10 +95,12 @@ struct imc_pmu {
  * Domains for IMC PMUs
  */
 #define IMC_DOMAIN_NEST		1
+#define IMC_DOMAIN_CORE		2
 
 #define IMC_COUNTER_ENABLE     1
 #define IMC_COUNTER_DISABLE    0
 
 extern struct imc_pmu *per_nest_pmu_arr[IMC_MAX_PMUS];
+extern struct imc_pmu *core_imc_pmu;
 extern int __init init_imc_pmu(struct imc_events *events, int idx, struct imc_pmu *pmu_ptr);
 #endif /* PPC_POWERNV_IMC_PMU_DEF_H */
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index e0c5c66..047370e 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -1008,6 +1008,9 @@ enum {
 
 /* In-Memory Collection Counters Type */
 enum {
+	IMC_COUNTER_PER_SUB_CORE        = 0x2,
+	IMC_COUNTER_PER_CORE            = 0x4,
+	IMC_COUNTER_PER_QUAD            = 0x8,
 	IMC_COUNTER_PER_CHIP            = 0x10,
 	IMC_COUNTER_PER_SOCKET          = 0x20,
 };
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index 976ba31..463425c 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -20,6 +20,8 @@
 
 /* Needed for sanity check */
 extern u64 nest_max_offset;
+extern u64 core_max_offset;
+
 struct imc_pmu *per_nest_pmu_arr[IMC_MAX_PMUS];
 static cpumask_t nest_imc_cpumask;
 static int nest_imc_cpumask_initialized;
@@ -28,6 +30,8 @@ static atomic_t nest_events;
 /* Used to avoid races in calling enable/disable nest-pmu units */
 static DEFINE_MUTEX(imc_nest_reserve);
 
+struct imc_pmu *core_imc_pmu;
+
 struct imc_pmu *imc_event_to_pmu(struct perf_event *event)
 {
 	return container_of(event->pmu, struct imc_pmu, pmu);
diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c
index 4a4a9f4..a997f83 100644
--- a/arch/powerpc/platforms/powernv/opal-imc.c
+++ b/arch/powerpc/platforms/powernv/opal-imc.c
@@ -35,6 +35,7 @@
 #include <asm/imc-pmu.h>
 
 u64 nest_max_offset;
+u64 core_max_offset;
 
 static int imc_event_prop_update(char *name, struct imc_events *events)
 {
@@ -115,6 +116,10 @@ static void update_max_value(u32 value, int pmu_domain)
 		if (nest_max_offset < value)
 			nest_max_offset = value;
 		break;
+	case IMC_DOMAIN_CORE:
+		if (core_max_offset < value)
+			core_max_offset = value;
+		break;
 	default:
 		/* Unknown domain, return */
 		return;
@@ -400,7 +405,7 @@ static int imc_get_mem_addr_nest(struct device_node *node,
 /*
  * imc_pmu_create : Takes the parent device which is the pmu unit, pmu_index
  *		    and domain as the inputs.
- * Allocates memory for the pmu, sets up its domain (NEST), and
+ * Allocates memory for the pmu, sets up its domain (NEST/CORE), and
  * calls imc_events_setup() to allocate memory for the events supported
  * by this pmu. Assigns a name for the pmu.
  *
@@ -427,7 +432,10 @@ static int imc_pmu_create(struct device_node *parent, int pmu_index, int domain)
 	pmu_ptr->domain = domain;
 
 	/* Needed for hotplug/migration */
-	per_nest_pmu_arr[pmu_index] = pmu_ptr;
+	if (pmu_ptr->domain == IMC_DOMAIN_CORE)
+		core_imc_pmu = pmu_ptr;
+	else if (pmu_ptr->domain == IMC_DOMAIN_NEST)
+		per_nest_pmu_arr[pmu_index] = pmu_ptr;
 
 	pp = of_find_property(parent, "name", NULL);
 	if (!pp) {
@@ -448,7 +456,10 @@ static int imc_pmu_create(struct device_node *parent, int pmu_index, int domain)
 		goto free_pmu;
 	}
 	/* Save the name to register it later */
-	sprintf(buf, "nest_%s", (char *)pp->value);
+	if (pmu_ptr->domain == IMC_DOMAIN_NEST)
+		sprintf(buf, "nest_%s", (char *)pp->value);
+	else
+		sprintf(buf, "%s_imc", (char *)pp->value);
 	pmu_ptr->pmu.name = (char *)buf;
 
 	if (of_property_read_u32(parent, "size", &pmu_ptr->counter_mem_size))
@@ -511,6 +522,8 @@ static int opal_imc_counters_probe(struct platform_device *pdev)
 			continue;
 		if (type == IMC_COUNTER_PER_CHIP)
 			domain = IMC_DOMAIN_NEST;
+		else if (type == IMC_COUNTER_PER_CORE)
+			domain = IMC_DOMAIN_CORE;
 		else
 			continue;
 		if (!imc_pmu_create(imc_dev, pmu_count, domain))
-- 
2.7.4