[PATCH 19/23] net/nfp: add support of ring pop and push

[Chaoyong He <chaoyong.he@corigine.com>]

From: Peng Zhang <peng.zhang@corigine.com>

Add support of ring pop and push, the ring memory is in firmware
side, we add this support to make it is possible to share resource
between PFs.

Signed-off-by: Peng Zhang <peng.zhang@corigine.com>
Reviewed-by: Chaoyong He <chaoyong.he@corigine.com>
Reviewed-by: Long Wu <long.wu@corigine.com>
---
 drivers/net/nfp/nfpcore/nfp_rtsym.c  | 103 +++++++++++++++++++++++++++
 drivers/net/nfp/nfpcore/nfp_rtsym.h  |   4 ++
 drivers/net/nfp/nfpcore/nfp_target.c |   2 +
 3 files changed, 109 insertions(+)

diff --git a/drivers/net/nfp/nfpcore/nfp_rtsym.c b/drivers/net/nfp/nfpcore/nfp_rtsym.c
index 2fedd4d9af..7d9cfb0d42 100644
--- a/drivers/net/nfp/nfpcore/nfp_rtsym.c
+++ b/drivers/net/nfp/nfpcore/nfp_rtsym.c
@@ -706,3 +706,106 @@ nfp_rtsym_map(struct nfp_rtsym_table *rtbl,
 {
 	return nfp_rtsym_map_offset(rtbl, name, 0, min_size, area);
 }
+
+/**
+ * Pop a simple unsigned scalar value from ring
+ *
+ * Lookup the symbol table for ring base and address, then pop value base on
+ * the ring with cpp read and write operation.
+ *
+ * @param rtbl
+ *    NFP run-time symbol table
+ * @param aux_name
+ *    The auxiliary rtsym table name which can ensure ring base and address
+ * @param name
+ *    The rtsym table name which can handle the ring
+ * @param value
+ *    Pop this value from ring
+ *
+ * @return
+ *    0 on success, negative errno otherwise.
+ */
+int
+nfp_rtsym_readl_indirect(struct nfp_rtsym_table *rtbl,
+		const char *aux_name,
+		const char *name,
+		uint32_t *value)
+{
+	int ret;
+	uint32_t cpp_id;
+	const struct nfp_rtsym *sym;
+	const struct nfp_rtsym *aux_sym;
+
+	if (value == NULL)
+		return -EINVAL;
+
+	aux_sym = nfp_rtsym_lookup(rtbl, aux_name);
+	if (aux_sym == NULL) {
+		PMD_DRV_LOG(ERR, "Failed to find symbol %s", aux_name);
+		return -ENOENT;
+	}
+
+	sym = nfp_rtsym_lookup(rtbl, name);
+	if (sym == NULL) {
+		PMD_DRV_LOG(ERR, "Failed to find symbol %s", name);
+		return -ENOENT;
+	}
+
+	/* Ring Pop */
+	cpp_id = NFP_CPP_ISLAND_ID(aux_sym->target, 22, 0, aux_sym->domain);
+	ret = nfp_cpp_readl(rtbl->cpp, cpp_id, sym->addr, value);
+	if (ret != 0)
+		return -EIO;
+
+	return 0;
+}
+
+/**
+ * Push a simple unsigned scalar value to ring
+ *
+ * Lookup the symbol table for ring base and address, then Push value base on
+ * the ring with cpp read and write operation.
+ *
+ * @param rtbl
+ *    NFP run-time symbol table
+ * @param aux_name
+ *    The auxiliary rtsym table name which can ensure ring base and address
+ * @param name
+ *    The rtsym table name which can handle the ring
+ * @param value
+ *    Push this value to ring
+ *
+ * @return
+ *    0 on success, negative errno otherwise.
+ */
+int
+nfp_rtsym_writel_indirect(struct nfp_rtsym_table *rtbl,
+		const char *aux_name,
+		const char *name,
+		uint32_t value)
+{
+	int ret;
+	uint32_t cpp_id;
+	const struct nfp_rtsym *sym;
+	const struct nfp_rtsym *aux_sym;
+
+	aux_sym = nfp_rtsym_lookup(rtbl, aux_name);
+	if (aux_sym == NULL) {
+		PMD_DRV_LOG(ERR, "Failed to find symbol %s", aux_name);
+		return -ENOENT;
+	}
+
+	sym = nfp_rtsym_lookup(rtbl, name);
+	if (sym == NULL) {
+		PMD_DRV_LOG(ERR, "Failed to find symbol %s", name);
+		return -ENOENT;
+	}
+
+	/* Ring Put */
+	cpp_id = NFP_CPP_ISLAND_ID(aux_sym->target, 20, 0, aux_sym->domain);
+	ret = nfp_cpp_writel(rtbl->cpp, cpp_id, sym->addr, value);
+	if (ret != 0)
+		return -EIO;
+
+	return 0;
+}
diff --git a/drivers/net/nfp/nfpcore/nfp_rtsym.h b/drivers/net/nfp/nfpcore/nfp_rtsym.h
index 3e8acdd38e..5b1ea53bea 100644
--- a/drivers/net/nfp/nfpcore/nfp_rtsym.h
+++ b/drivers/net/nfp/nfpcore/nfp_rtsym.h
@@ -42,5 +42,9 @@ uint8_t *nfp_rtsym_map(struct nfp_rtsym_table *rtbl, const char *name,
 		uint32_t min_size, struct nfp_cpp_area **area);
 uint8_t *nfp_rtsym_map_offset(struct nfp_rtsym_table *rtbl, const char *name,
 		uint32_t offset, uint32_t min_size, struct nfp_cpp_area **area);
+int nfp_rtsym_readl_indirect(struct nfp_rtsym_table *rtbl, const char *aux_name,
+		const char *name, uint32_t *value);
+int nfp_rtsym_writel_indirect(struct nfp_rtsym_table *rtbl, const char *aux_name,
+		const char *name, uint32_t value);
 
 #endif /* __NFP_RTSYM_H__ */
diff --git a/drivers/net/nfp/nfpcore/nfp_target.c b/drivers/net/nfp/nfpcore/nfp_target.c
index ea5b39a4b9..0e7a5cbb05 100644
--- a/drivers/net/nfp/nfpcore/nfp_target.c
+++ b/drivers/net/nfp/nfpcore/nfp_target.c
@@ -264,6 +264,8 @@ nfp6000_mu_emu(uint32_t cpp_id)
 		return PUSHPULL(P32, 0);
 	case NFP_CPP_ID(0, 18, 3): /* write_queue_ring */
 		return PUSHPULL(P32, 0);
+	case NFP_CPP_ID(0, 20, 0): /* put */
+		return PUSHPULL(P32, 0);
 	case NFP_CPP_ID(0, 20, 2): /* journal */
 		return PUSHPULL(P32, 0);
 	case NFP_CPP_ID(0, 21, 0): /* get */
-- 
2.39.1