[dpdk-dev] [PATCH] common/cnxk: add helpers for reading runplatform

[Tomasz Duszynski]

Add helper functions that allow one to check platform
ROC is running on. Platform type is retrieved from device
tree attribute runplatform which is updated by EBF accordingly.

Signed-off-by: Tomasz Duszynski <tduszynski at marvell.com>
Reviewed-by: Jerin Jacob Kollanukkaran <jerinj at marvell.com>
---
 drivers/common/cnxk/roc_model.c | 53 ++++++++++++++++++++++++++++++++-
 drivers/common/cnxk/roc_model.h | 29 ++++++++++++++++++
 2 files changed, 81 insertions(+), 1 deletion(-)

diff --git a/drivers/common/cnxk/roc_model.c b/drivers/common/cnxk/roc_model.c
index e5aeabe2e2..447dc6e8bc 100644
--- a/drivers/common/cnxk/roc_model.c
+++ b/drivers/common/cnxk/roc_model.c
@@ -178,6 +178,55 @@ detect_invalid_config(void)
 #endif
 }
 
+static uint64_t
+env_lookup_flag(const char *name)
+{
+	unsigned int i;
+	struct {
+		const char *name;
+		uint64_t flag;
+	} envs[] = {
+		{"HW_PLATFORM", ROC_ENV_HW},
+		{"EMUL_PLATFORM", ROC_ENV_EMUL},
+		{"ASIM_PLATFORM", ROC_ENV_ASIM},
+	};
+
+	for (i = 0; i < PLT_DIM(envs); i++)
+		if (!strncmp(envs[i].name, name, strlen(envs[i].name)))
+			return envs[i].flag;
+
+	return 0;
+}
+
+static void
+of_env_get(struct roc_model *model)
+{
+	const char *const path = "/proc/device-tree/soc at 0/runplatform";
+	uint64_t flag;
+	FILE *fp;
+
+	fp = fopen(path, "r");
+	if (!fp) {
+		plt_err("Failed to open %s", path);
+		return;
+	}
+
+	if (!fgets(model->env, sizeof(model->env), fp)) {
+		plt_err("Failed to read %s", path);
+		goto err;
+	}
+
+	flag = env_lookup_flag(model->env);
+	if (flag == 0) {
+		plt_err("Unknown platform: %s", model->env);
+		goto err;
+	}
+
+	model->flag |= flag;
+err:
+	fclose(fp);
+}
+
 int
 roc_model_init(struct roc_model *model)
 {
@@ -197,8 +246,10 @@ roc_model_init(struct roc_model *model)
 	if (!populate_model(model, midr))
 		goto err;
 
+	of_env_get(model);
+
 	rc = 0;
-	plt_info("RoC Model: %s", model->name);
+	plt_info("RoC Model: %s (%s)", model->name, model->env);
 	roc_model = model;
 err:
 	return rc;
diff --git a/drivers/common/cnxk/roc_model.h b/drivers/common/cnxk/roc_model.h
index a54f435b46..3779a88bca 100644
--- a/drivers/common/cnxk/roc_model.h
+++ b/drivers/common/cnxk/roc_model.h
@@ -23,10 +23,15 @@ struct roc_model {
 #define ROC_MODEL_CN106xx_A0   BIT_ULL(20)
 #define ROC_MODEL_CNF105xx_A0  BIT_ULL(21)
 #define ROC_MODEL_CNF105xxN_A0 BIT_ULL(22)
+/* Following flags describe platform code is running on */
+#define ROC_ENV_HW   BIT_ULL(61)
+#define ROC_ENV_EMUL BIT_ULL(62)
+#define ROC_ENV_ASIM BIT_ULL(63)
 
 	uint64_t flag;
 #define ROC_MODEL_STR_LEN_MAX 128
 	char name[ROC_MODEL_STR_LEN_MAX];
+	char env[ROC_MODEL_STR_LEN_MAX];
 } __plt_cache_aligned;
 
 #define ROC_MODEL_CN96xx_Ax (ROC_MODEL_CN96xx_A0 | ROC_MODEL_CN96xx_B0)
@@ -158,6 +163,30 @@ roc_model_is_cnf10kb_a0(void)
 	return roc_model->flag & ROC_MODEL_CNF105xxN_A0;
 }
 
+static inline bool
+roc_env_is_hw(void)
+{
+	return roc_model->flag & ROC_ENV_HW;
+}
+
+static inline bool
+roc_env_is_emulator(void)
+{
+	return roc_model->flag & ROC_ENV_EMUL;
+}
+
+static inline bool
+roc_env_is_asim(void)
+{
+	return roc_model->flag & ROC_ENV_ASIM;
+}
+
+static inline const char *
+roc_env_get(void)
+{
+	return roc_model->env;
+}
+
 int roc_model_init(struct roc_model *model);
 
 #endif
-- 
2.25.1