From:   Zhang Rui <rui.zhang@intel.com>
To:     linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com,
        daniel.lezcano@linaro.org
Cc:     linux-kernel@vger.kernel.org, srinivas.pandruvada@intel.com
Subject: [PATCH 04/15] powercap/intel_rapl: Support per Interface primitive information
Date:   Thu, 16 Mar 2023 23:38:30 +0800
Message-Id: <20230316153841.3666-5-rui.zhang@intel.com>
In-Reply-To: <20230316153841.3666-1-rui.zhang@intel.com>
References: <20230316153841.3666-1-rui.zhang@intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

RAPL primitive information is Interface specific.

Although current MSR and MMIO Interface share the same RAPL primitives,
new Interface like TPMI has its own RAPL primitive information.

Save the primitive information in the Interface private structure.

Plus, using variant name "rp" for struct rapl_primitive_info is
confusing because "rp" is also used for struct rapl_package.
Use "rpi" as the variant name for struct rapl_primitive_info, and rename
the previous rpi[] array to avoid conflict.

No functional change.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
---
 drivers/powercap/intel_rapl_common.c | 50 ++++++++++++++++++----------
 include/linux/intel_rapl.h           |  2 ++
 2 files changed, 35 insertions(+), 17 deletions(-)

diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
index 56e8af2a1e6f..898238285188 100644
--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -654,7 +654,7 @@ static u64 rapl_unit_xlate(struct rapl_domain *rd, enum unit_type type,
 }
 
 /* in the order of enum rapl_primitives */
-static struct rapl_primitive_info rpi[] = {
+static struct rapl_primitive_info rpis_default[] = {
 	/* name, mask, shift, msr index, unit divisor */
 	PRIMITIVE_INFO_INIT(ENERGY_COUNTER, ENERGY_STATUS_MASK, 0,
 			    RAPL_DOMAIN_REG_STATUS, ENERGY_UNIT, 0),
@@ -710,9 +710,20 @@ static struct rapl_primitive_info rpi[] = {
 	{NULL, 0, 0, 0},
 };
 
+static struct rapl_primitive_info *get_rpi(struct rapl_package *rp, int prim)
+{
+	struct rapl_primitive_info *rpi = rp->priv->rpi;
+
+	if (prim < 0 || prim > NR_RAPL_PRIMITIVES || !rpi)
+		return NULL;
+
+	return &rpi[prim];
+}
+
 static int rapl_config(struct rapl_package *rp)
 {
 	rp->priv->rpd = (void *)rapl_defaults;
+	rp->priv->rpi = (void *)rpis_default;
 	return 0;
 }
 
@@ -763,14 +774,14 @@ static int rapl_read_data_raw(struct rapl_domain *rd,
 {
 	u64 value;
 	enum rapl_primitives prim_fixed = prim_fixups(rd, prim);
-	struct rapl_primitive_info *rp = &rpi[prim_fixed];
+	struct rapl_primitive_info *rpi = get_rpi(rd->rp, prim_fixed);
 	struct reg_action ra;
 	int cpu;
 
-	if (!rp->name || rp->flag & RAPL_PRIMITIVE_DUMMY)
+	if (!rpi || !rpi->name || rpi->flag & RAPL_PRIMITIVE_DUMMY)
 		return -EINVAL;
 
-	ra.reg = rd->regs[rp->id];
+	ra.reg = rd->regs[rpi->id];
 	if (!ra.reg)
 		return -EINVAL;
 
@@ -778,26 +789,26 @@ static int rapl_read_data_raw(struct rapl_domain *rd,
 
 	/* domain with 2 limits has different bit */
 	if (prim == FW_LOCK && rd->rp->priv->limits[rd->id] == 2) {
-		rp->mask = POWER_HIGH_LOCK;
-		rp->shift = 63;
+		rpi->mask = POWER_HIGH_LOCK;
+		rpi->shift = 63;
 	}
 	/* non-hardware data are collected by the polling thread */
-	if (rp->flag & RAPL_PRIMITIVE_DERIVED) {
+	if (rpi->flag & RAPL_PRIMITIVE_DERIVED) {
 		*data = rd->rdd.primitives[prim];
 		return 0;
 	}
 
-	ra.mask = rp->mask;
+	ra.mask = rpi->mask;
 
 	if (rd->rp->priv->read_raw(cpu, &ra)) {
 		pr_debug("failed to read reg 0x%llx on cpu %d\n", ra.reg, cpu);
 		return -EIO;
 	}
 
-	value = ra.value >> rp->shift;
+	value = ra.value >> rpi->shift;
 
 	if (xlate)
-		*data = rapl_unit_xlate(rd, rp->unit, value, 0);
+		*data = rapl_unit_xlate(rd, rpi->unit, value, 0);
 	else
 		*data = value;
 
@@ -810,21 +821,24 @@ static int rapl_write_data_raw(struct rapl_domain *rd,
 			       unsigned long long value)
 {
 	enum rapl_primitives prim_fixed = prim_fixups(rd, prim);
-	struct rapl_primitive_info *rp = &rpi[prim_fixed];
+	struct rapl_primitive_info *rpi = get_rpi(rd->rp, prim_fixed);
 	int cpu;
 	u64 bits;
 	struct reg_action ra;
 	int ret;
 
+	if (!rpi || !rpi->name || rpi->flag & RAPL_PRIMITIVE_DUMMY)
+		return -EINVAL;
+
 	cpu = rd->rp->lead_cpu;
-	bits = rapl_unit_xlate(rd, rp->unit, value, 1);
-	bits <<= rp->shift;
-	bits &= rp->mask;
+	bits = rapl_unit_xlate(rd, rpi->unit, value, 1);
+	bits <<= rpi->shift;
+	bits &= rpi->mask;
 
 	memset(&ra, 0, sizeof(ra));
 
-	ra.reg = rd->regs[rp->id];
-	ra.mask = rp->mask;
+	ra.reg = rd->regs[rpi->id];
+	ra.mask = rpi->mask;
 	ra.value = bits;
 
 	ret = rd->rp->priv->write_raw(cpu, &ra);
@@ -1176,8 +1190,10 @@ static void rapl_update_domain_data(struct rapl_package *rp)
 			 rp->domains[dmn].name);
 		/* exclude non-raw primitives */
 		for (prim = 0; prim < NR_RAW_PRIMITIVES; prim++) {
+			struct rapl_primitive_info *rpi = get_rpi(rp, prim);
+
 			if (!rapl_read_data_raw(&rp->domains[dmn], prim,
-						rpi[prim].unit, &val))
+						rpi->unit, &val))
 				rp->domains[dmn].rdd.primitives[prim] = val;
 		}
 	}
diff --git a/include/linux/intel_rapl.h b/include/linux/intel_rapl.h
index 76d480733b0f..b935484dde3a 100644
--- a/include/linux/intel_rapl.h
+++ b/include/linux/intel_rapl.h
@@ -122,6 +122,7 @@ struct reg_action {
  * @write_raw:			Callback for writing RAPL interface specific
  *				registers.
  * @rpd:			internal pointer to interface default settings
+ * @rpi:			internal pointer to interface primitive info
  */
 struct rapl_if_priv {
 	struct powercap_control_type *control_type;
@@ -132,6 +133,7 @@ struct rapl_if_priv {
 	int (*read_raw)(int cpu, struct reg_action *ra);
 	int (*write_raw)(int cpu, struct reg_action *ra);
 	void *rpd;
+	void *rpi;
 };
 
 /* maximum rapl package domain name: package-%d-die-%d */
-- 
2.25.1