interconnect: sdm660: merge common code into icc-rpm

Other RPM interconnect drivers might also use QoS support. Move AP-owned
nodes support from SDM660 driver to common icc-rpm.c.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Tested-by: Marijn Suijten <marijn.suijten@somainline.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Link: https://lore.kernel.org/r/20210903232421.1384199-5-dmitry.baryshkov@linaro.orgSigned-off-by: Georgi Djakov <djakov@kernel.org>

drivers/interconnect/qcom/icc-rpm.c

@@ -11,60 +11,228 @@
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/regmap.h>
 #include <linux/slab.h>
 
 #include "smd-rpm.h"
 #include "icc-rpm.h"
 
-static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
+/* BIMC QoS */
+#define M_BKE_REG_BASE(n)		(0x300 + (0x4000 * n))
+#define M_BKE_EN_ADDR(n)		(M_BKE_REG_BASE(n))
+#define M_BKE_HEALTH_CFG_ADDR(i, n)	(M_BKE_REG_BASE(n) + 0x40 + (0x4 * i))
+
+#define M_BKE_HEALTH_CFG_LIMITCMDS_MASK	0x80000000
+#define M_BKE_HEALTH_CFG_AREQPRIO_MASK	0x300
+#define M_BKE_HEALTH_CFG_PRIOLVL_MASK	0x3
+#define M_BKE_HEALTH_CFG_AREQPRIO_SHIFT	0x8
+#define M_BKE_HEALTH_CFG_LIMITCMDS_SHIFT 0x1f
+
+#define M_BKE_EN_EN_BMASK		0x1
+
+/* NoC QoS */
+#define NOC_QOS_PRIORITYn_ADDR(n)	(0x8 + (n * 0x1000))
+#define NOC_QOS_PRIORITY_P1_MASK	0xc
+#define NOC_QOS_PRIORITY_P0_MASK	0x3
+#define NOC_QOS_PRIORITY_P1_SHIFT	0x2
+
+#define NOC_QOS_MODEn_ADDR(n)		(0xc + (n * 0x1000))
+#define NOC_QOS_MODEn_MASK		0x3
+
+static int qcom_icc_bimc_set_qos_health(struct regmap *rmap,
+					struct qcom_icc_qos *qos,
+					int regnum)
+{
+	u32 val;
+	u32 mask;
+
+	val = qos->prio_level;
+	mask = M_BKE_HEALTH_CFG_PRIOLVL_MASK;
+
+	val |= qos->areq_prio << M_BKE_HEALTH_CFG_AREQPRIO_SHIFT;
+	mask |= M_BKE_HEALTH_CFG_AREQPRIO_MASK;
+
+	/* LIMITCMDS is not present on M_BKE_HEALTH_3 */
+	if (regnum != 3) {
+		val |= qos->limit_commands << M_BKE_HEALTH_CFG_LIMITCMDS_SHIFT;
+		mask |= M_BKE_HEALTH_CFG_LIMITCMDS_MASK;
+	}
+
+	return regmap_update_bits(rmap,
+				  M_BKE_HEALTH_CFG_ADDR(regnum, qos->qos_port),
+				  mask, val);
+}
+
+static int qcom_icc_set_bimc_qos(struct icc_node *src, u64 max_bw)
 {
 	struct qcom_icc_provider *qp;
 	struct qcom_icc_node *qn;
 	struct icc_provider *provider;
-	struct icc_node *n;
-	u64 sum_bw;
-	u64 max_peak_bw;
-	u64 rate;
-	u32 agg_avg = 0;
-	u32 agg_peak = 0;
-	int ret, i;
+	u32 mode = NOC_QOS_MODE_BYPASS;
+	u32 val = 0;
+	int i, rc = 0;
 
 	qn = src->data;
 	provider = src->provider;
 	qp = to_qcom_provider(provider);
 
-	list_for_each_entry(n, &provider->nodes, node_list)
-		provider->aggregate(n, 0, n->avg_bw, n->peak_bw,
-				    &agg_avg, &agg_peak);
+	if (qn->qos.qos_mode != -1)
+		mode = qn->qos.qos_mode;
+
+	/* QoS Priority: The QoS Health parameters are getting considered
+	 * only if we are NOT in Bypass Mode.
+	 */
+	if (mode != NOC_QOS_MODE_BYPASS) {
+		for (i = 3; i >= 0; i--) {
+			rc = qcom_icc_bimc_set_qos_health(qp->regmap,
+							  &qn->qos, i);
+			if (rc)
+				return rc;
+		}
 
-	sum_bw = icc_units_to_bps(agg_avg);
-	max_peak_bw = icc_units_to_bps(agg_peak);
+		/* Set BKE_EN to 1 when Fixed, Regulator or Limiter Mode */
+		val = 1;
+	}
+
+	return regmap_update_bits(qp->regmap, M_BKE_EN_ADDR(qn->qos.qos_port),
+				  M_BKE_EN_EN_BMASK, val);
+}
+
+static int qcom_icc_noc_set_qos_priority(struct regmap *rmap,
+					 struct qcom_icc_qos *qos)
+{
+	u32 val;
+	int rc;
+
+	/* Must be updated one at a time, P1 first, P0 last */
+	val = qos->areq_prio << NOC_QOS_PRIORITY_P1_SHIFT;
+	rc = regmap_update_bits(rmap, NOC_QOS_PRIORITYn_ADDR(qos->qos_port),
+				NOC_QOS_PRIORITY_P1_MASK, val);
+	if (rc)
+		return rc;
+
+	return regmap_update_bits(rmap, NOC_QOS_PRIORITYn_ADDR(qos->qos_port),
+				  NOC_QOS_PRIORITY_P0_MASK, qos->prio_level);
+}
+
+static int qcom_icc_set_noc_qos(struct icc_node *src, u64 max_bw)
+{
+	struct qcom_icc_provider *qp;
+	struct qcom_icc_node *qn;
+	struct icc_provider *provider;
+	u32 mode = NOC_QOS_MODE_BYPASS;
+	int rc = 0;
+
+	qn = src->data;
+	provider = src->provider;
+	qp = to_qcom_provider(provider);
+
+	if (qn->qos.qos_port < 0) {
+		dev_dbg(src->provider->dev,
+			"NoC QoS: Skipping %s: vote aggregated on parent.\n",
+			qn->name);
+		return 0;
+	}
+
+	if (qn->qos.qos_mode != -1)
+		mode = qn->qos.qos_mode;
+
+	if (mode == NOC_QOS_MODE_FIXED) {
+		dev_dbg(src->provider->dev, "NoC QoS: %s: Set Fixed mode\n",
+			qn->name);
+		rc = qcom_icc_noc_set_qos_priority(qp->regmap, &qn->qos);
+		if (rc)
+			return rc;
+	} else if (mode == NOC_QOS_MODE_BYPASS) {
+		dev_dbg(src->provider->dev, "NoC QoS: %s: Set Bypass mode\n",
+			qn->name);
+	}
+
+	return regmap_update_bits(qp->regmap,
+				  NOC_QOS_MODEn_ADDR(qn->qos.qos_port),
+				  NOC_QOS_MODEn_MASK, mode);
+}
 
-	/* send bandwidth request message to the RPM processor */
-	if (qn->mas_rpm_id != -1) {
+static int qcom_icc_qos_set(struct icc_node *node, u64 sum_bw)
+{
+	struct qcom_icc_provider *qp = to_qcom_provider(node->provider);
+	struct qcom_icc_node *qn = node->data;
+
+	dev_dbg(node->provider->dev, "Setting QoS for %s\n", qn->name);
+
+	if (qp->is_bimc_node)
+		return qcom_icc_set_bimc_qos(node, sum_bw);
+
+	return qcom_icc_set_noc_qos(node, sum_bw);
+}
+
+static int qcom_icc_rpm_set(int mas_rpm_id, int slv_rpm_id, u64 sum_bw)
+{
+	int ret = 0;
+
+	if (mas_rpm_id != -1) {
 		ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE,
 					    RPM_BUS_MASTER_REQ,
-					    qn->mas_rpm_id,
+					    mas_rpm_id,
 					    sum_bw);
 		if (ret) {
 			pr_err("qcom_icc_rpm_smd_send mas %d error %d\n",
-			       qn->mas_rpm_id, ret);
+			       mas_rpm_id, ret);
 			return ret;
 		}
 	}
 
-	if (qn->slv_rpm_id != -1) {
+	if (slv_rpm_id != -1) {
 		ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE,
 					    RPM_BUS_SLAVE_REQ,
-					    qn->slv_rpm_id,
+					    slv_rpm_id,
 					    sum_bw);
 		if (ret) {
 			pr_err("qcom_icc_rpm_smd_send slv %d error %d\n",
-			       qn->slv_rpm_id, ret);
+			       slv_rpm_id, ret);
 			return ret;
 		}
 	}
 
+	return ret;
+}
+
+static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
+{
+	struct qcom_icc_provider *qp;
+	struct qcom_icc_node *qn;
+	struct icc_provider *provider;
+	struct icc_node *n;
+	u64 sum_bw;
+	u64 max_peak_bw;
+	u64 rate;
+	u32 agg_avg = 0;
+	u32 agg_peak = 0;
+	int ret, i;
+
+	qn = src->data;
+	provider = src->provider;
+	qp = to_qcom_provider(provider);
+
+	list_for_each_entry(n, &provider->nodes, node_list)
+		provider->aggregate(n, 0, n->avg_bw, n->peak_bw,
+				    &agg_avg, &agg_peak);
+
+	sum_bw = icc_units_to_bps(agg_avg);
+	max_peak_bw = icc_units_to_bps(agg_peak);
+
+	if (!qn->qos.ap_owned) {
+		/* send bandwidth request message to the RPM processor */
+		ret = qcom_icc_rpm_set(qn->mas_rpm_id, qn->slv_rpm_id, sum_bw);
+		if (ret)
+			return ret;
+	} else if (qn->qos.qos_mode != -1) {
+		/* set bandwidth directly from the AP */
+		ret = qcom_icc_qos_set(src, sum_bw);
+		if (ret)
+			return ret;
+	}
+
 	rate = max(sum_bw, max_peak_bw);
 
 	do_div(rate, qn->buswidth);
@@ -115,8 +283,13 @@ int qnoc_probe(struct platform_device *pdev)
 	qnodes = desc->nodes;
 	num_nodes = desc->num_nodes;
 
-	cds = bus_clocks;
-	cd_num = ARRAY_SIZE(bus_clocks);
+	if (desc->num_clocks) {
+		cds = desc->clocks;
+		cd_num = desc->num_clocks;
+	} else {
+		cds = bus_clocks;
+		cd_num = ARRAY_SIZE(bus_clocks);
+	}
 
 	qp = devm_kzalloc(dev, struct_size(qp, bus_clks, cd_num), GFP_KERNEL);
 	if (!qp)
@@ -131,6 +304,30 @@ int qnoc_probe(struct platform_device *pdev)
 		qp->bus_clks[i].id = cds[i];
 	qp->num_clks = cd_num;
 
+	qp->is_bimc_node = desc->is_bimc_node;
+
+	if (desc->regmap_cfg) {
+		struct resource *res;
+		void __iomem *mmio;
+
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		if (!res)
+			return -ENODEV;
+
+		mmio = devm_ioremap_resource(dev, res);
+
+		if (IS_ERR(mmio)) {
+			dev_err(dev, "Cannot ioremap interconnect bus resource\n");
+			return PTR_ERR(mmio);
+		}
+
+		qp->regmap = devm_regmap_init_mmio(dev, mmio, desc->regmap_cfg);
+		if (IS_ERR(qp->regmap)) {
+			dev_err(dev, "Cannot regmap interconnect bus resource\n");
+			return PTR_ERR(qp->regmap);
+		}
+	}
+
 	ret = devm_clk_bulk_get(dev, qp->num_clks, qp->bus_clks);
 	if (ret)
 		return ret;

drivers/interconnect/qcom/icc-rpm.h

@@ -9,8 +9,6 @@
 #define RPM_BUS_MASTER_REQ	0x73616d62
 #define RPM_BUS_SLAVE_REQ	0x766c7362
 
-#define QCOM_MAX_LINKS 12
-
 #define to_qcom_provider(_provider) \
 	container_of(_provider, struct qcom_icc_provider, provider)
 
@@ -19,13 +17,35 @@
  * @provider: generic interconnect provider
  * @bus_clks: the clk_bulk_data table of bus clocks
  * @num_clks: the total number of clk_bulk_data entries
+ * @is_bimc_node: indicates whether to use bimc specific setting
+ * @regmap: regmap for QoS registers read/write access
  */
 struct qcom_icc_provider {
 	struct icc_provider provider;
 	int num_clks;
+	bool is_bimc_node;
+	struct regmap *regmap;
 	struct clk_bulk_data bus_clks[];
 };
 
+/**
+ * struct qcom_icc_qos - Qualcomm specific interconnect QoS parameters
+ * @areq_prio: node requests priority
+ * @prio_level: priority level for bus communication
+ * @limit_commands: activate/deactivate limiter mode during runtime
+ * @ap_owned: indicates if the node is owned by the AP or by the RPM
+ * @qos_mode: default qos mode for this node
+ * @qos_port: qos port number for finding qos registers of this node
+ */
+struct qcom_icc_qos {
+	u32 areq_prio;
+	u32 prio_level;
+	bool limit_commands;
+	bool ap_owned;
+	int qos_mode;
+	int qos_port;
+};
+
 /**
  * struct qcom_icc_node - Qualcomm specific interconnect nodes
  * @name: the node name used in debugfs
@@ -35,36 +55,48 @@ struct qcom_icc_provider {
  * @buswidth: width of the interconnect between a node and the bus (bytes)
  * @mas_rpm_id:	RPM id for devices that are bus masters
  * @slv_rpm_id:	RPM id for devices that are bus slaves
+ * @qos: NoC QoS setting parameters
  * @rate: current bus clock rate in Hz
  */
 struct qcom_icc_node {
 	unsigned char *name;
 	u16 id;
-	u16 links[QCOM_MAX_LINKS];
+	const u16 *links;
 	u16 num_links;
 	u16 buswidth;
 	int mas_rpm_id;
 	int slv_rpm_id;
+	struct qcom_icc_qos qos;
 	u64 rate;
 };
 
 struct qcom_icc_desc {
 	struct qcom_icc_node **nodes;
 	size_t num_nodes;
+	const char * const *clocks;
+	size_t num_clocks;
+	bool is_bimc_node;
+	const struct regmap_config *regmap_cfg;
 };
 
 #define DEFINE_QNODE(_name, _id, _buswidth, _mas_rpm_id, _slv_rpm_id,	\
 		     ...)						\
+		static const u16 _name ## _links[] = { __VA_ARGS__ };	\
+		\
 		static struct qcom_icc_node _name = {			\
 		.name = #_name,						\
 		.id = _id,						\
 		.buswidth = _buswidth,					\
 		.mas_rpm_id = _mas_rpm_id,				\
 		.slv_rpm_id = _slv_rpm_id,				\
-		.num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })),	\
-		.links = { __VA_ARGS__ },				\
+		.num_links = ARRAY_SIZE(_name ## _links),		\
+		.links = _name ## _links,				\
 	}
 
+/* Valid for both NoC and BIMC */
+#define NOC_QOS_MODE_INVALID		-1
+#define NOC_QOS_MODE_FIXED		0x0
+#define NOC_QOS_MODE_BYPASS		0x2
 
 int qnoc_probe(struct platform_device *pdev);
 int qnoc_remove(struct platform_device *pdev);