From: Satha Rao <skoteshwar@marvell.com>
Date: Wed, 23 Jun 2021 04:46:52 +0000 (+0530)
Subject: net/cnxk: support registers dump
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=48a882afd871335ed093da43a31cff19c52b0f7d;p=dpdk.git

net/cnxk: support registers dump

With this patch implemented api to dump platform registers for
debug purposes.

Signed-off-by: Satha Rao <skoteshwar@marvell.com>
---

diff --git a/doc/guides/nics/cnxk.rst b/doc/guides/nics/cnxk.rst
index bdf1fb122c..cb2a51e1d2 100644
--- a/doc/guides/nics/cnxk.rst
+++ b/doc/guides/nics/cnxk.rst
@@ -32,6 +32,7 @@ Features of the CNXK Ethdev PMD are:
 - MTU update
 - Scatter-Gather IO support
 - Vector Poll mode driver
+- Debug utilities - Context dump and error interrupt support
 - Support Rx interrupt
 
 Prerequisites
diff --git a/doc/guides/nics/features/cnxk.ini b/doc/guides/nics/features/cnxk.ini
index 08776e0eb9..53187bd395 100644
--- a/doc/guides/nics/features/cnxk.ini
+++ b/doc/guides/nics/features/cnxk.ini
@@ -37,6 +37,7 @@ Stats per queue      = Y
 Extended stats       = Y
 FW version           = Y
 Module EEPROM dump   = Y
+Registers dump       = Y
 Linux                = Y
 ARMv8                = Y
 Usage doc            = Y
diff --git a/doc/guides/nics/features/cnxk_vec.ini b/doc/guides/nics/features/cnxk_vec.ini
index bafe0506f8..705c44cef8 100644
--- a/doc/guides/nics/features/cnxk_vec.ini
+++ b/doc/guides/nics/features/cnxk_vec.ini
@@ -35,6 +35,7 @@ Stats per queue      = Y
 Extended stats       = Y
 FW version           = Y
 Module EEPROM dump   = Y
+Registers dump       = Y
 Linux                = Y
 ARMv8                = Y
 Usage doc            = Y
diff --git a/doc/guides/nics/features/cnxk_vf.ini b/doc/guides/nics/features/cnxk_vf.ini
index 9d49175d8a..00cf5c96e5 100644
--- a/doc/guides/nics/features/cnxk_vf.ini
+++ b/doc/guides/nics/features/cnxk_vf.ini
@@ -32,6 +32,7 @@ Stats per queue      = Y
 Extended stats       = Y
 FW version           = Y
 Module EEPROM dump   = Y
+Registers dump       = Y
 Linux                = Y
 ARMv8                = Y
 Usage doc            = Y
diff --git a/drivers/net/cnxk/cnxk_ethdev.c b/drivers/net/cnxk/cnxk_ethdev.c
index 26e4ddf9b0..b76442dfe4 100644
--- a/drivers/net/cnxk/cnxk_ethdev.c
+++ b/drivers/net/cnxk/cnxk_ethdev.c
@@ -1227,6 +1227,7 @@ struct eth_dev_ops cnxk_eth_dev_ops = {
 	.txq_info_get = cnxk_nix_txq_info_get,
 	.tx_done_cleanup = cnxk_nix_tx_done_cleanup,
 	.flow_ops_get = cnxk_nix_flow_ops_get,
+	.get_reg = cnxk_nix_dev_get_reg,
 };
 
 static int
diff --git a/drivers/net/cnxk/cnxk_ethdev.h b/drivers/net/cnxk/cnxk_ethdev.h
index a25be8aa37..d51a6d7053 100644
--- a/drivers/net/cnxk/cnxk_ethdev.h
+++ b/drivers/net/cnxk/cnxk_ethdev.h
@@ -328,6 +328,10 @@ void *cnxk_nix_fastpath_lookup_mem_get(void);
 int cnxk_ethdev_parse_devargs(struct rte_devargs *devargs,
 			      struct cnxk_eth_dev *dev);
 
+/* Debug */
+int cnxk_nix_dev_get_reg(struct rte_eth_dev *eth_dev,
+			 struct rte_dev_reg_info *regs);
+
 /* Inlines */
 static __rte_always_inline uint64_t
 cnxk_pktmbuf_detach(struct rte_mbuf *m)
diff --git a/drivers/net/cnxk/cnxk_ethdev_ops.c b/drivers/net/cnxk/cnxk_ethdev_ops.c
index 228c624da8..c879b2585e 100644
--- a/drivers/net/cnxk/cnxk_ethdev_ops.c
+++ b/drivers/net/cnxk/cnxk_ethdev_ops.c
@@ -697,3 +697,28 @@ cnxk_nix_tx_done_cleanup(void *txq, uint32_t free_cnt)
 
 	return 0;
 }
+
+int
+cnxk_nix_dev_get_reg(struct rte_eth_dev *eth_dev, struct rte_dev_reg_info *regs)
+{
+	struct cnxk_eth_dev *dev = cnxk_eth_pmd_priv(eth_dev);
+	struct roc_nix *nix = &dev->nix;
+	uint64_t *data = regs->data;
+	int rc = -ENOTSUP;
+
+	if (data == NULL) {
+		rc = roc_nix_lf_get_reg_count(nix);
+		if (rc > 0) {
+			regs->length = rc;
+			regs->width = 8;
+			rc = 0;
+		}
+		return rc;
+	}
+
+	if (!regs->length ||
+	    regs->length == (uint32_t)roc_nix_lf_get_reg_count(nix))
+		return roc_nix_lf_reg_dump(nix, data);
+
+	return rc;
+}