netdev - [PATCH net-next v3 2/4] octeon_ep: PF-VF mailbox version support

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Date: Sun, 10 Dec 2023 22:33:53 -0800
From: Shinas Rasheed <srasheed@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <hgani@...vell.com>, <vimleshk@...vell.com>, <egallen@...hat.com>,
        <mschmidt@...hat.com>, <pabeni@...hat.com>, <horms@...nel.org>,
        <kuba@...nel.org>, <davem@...emloft.net>, <wizhao@...hat.com>,
        <kheib@...hat.com>, <konguyen@...hat.com>,
        Shinas Rasheed
	<srasheed@...vell.com>,
        Veerasenareddy Burru <vburru@...vell.com>,
        "Sathesh
 Edara" <sedara@...vell.com>,
        Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next v3 2/4] octeon_ep: PF-VF mailbox version support

Add PF-VF mailbox initial version support

Signed-off-by: Shinas Rasheed <srasheed@...vell.com>
---
V3:
  - No changes

V2: https://lore.kernel.org/all/20231209081450.2613561-3-srasheed@marvell.com/
  - No changes

V1: https://lore.kernel.org/all/20231208070352.2606192-3-srasheed@marvell.com/

 .../net/ethernet/marvell/octeon_ep/octep_main.h   |  1 +
 .../ethernet/marvell/octeon_ep/octep_pfvf_mbox.c  | 15 ++++++++++++---
 .../ethernet/marvell/octeon_ep/octep_pfvf_mbox.h  |  7 +++++--
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.h b/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
index 3223bb6f95ea..fee59e0e0138 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
@@ -220,6 +220,7 @@ struct octep_iface_link_info {
 /* The Octeon VF device specific info data structure.*/
 struct octep_pfvf_info {
 	u8 mac_addr[ETH_ALEN];
+	u32 mbox_version;
 };
 
 /* The Octeon device specific private data structure.
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.c b/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.c
index 43b40e91f7bf..baffe298a2a0 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.c
@@ -28,10 +28,18 @@ static void octep_pfvf_validate_version(struct octep_device *oct,  u32 vf_id,
 {
 	u32 vf_version = (u32)cmd.s_version.version;
 
-	if (vf_version <= OCTEP_PFVF_MBOX_VERSION_V1)
-		rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
+	dev_dbg(&oct->pdev->dev, "VF id:%d VF version:%d PF version:%d\n",
+		vf_id, vf_version, OCTEP_PFVF_MBOX_VERSION_CURRENT);
+	if (vf_version < OCTEP_PFVF_MBOX_VERSION_CURRENT)
+		rsp->s_version.version = vf_version;
 	else
-		rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
+		rsp->s_version.version = OCTEP_PFVF_MBOX_VERSION_CURRENT;
+
+	oct->vf_info[vf_id].mbox_version = rsp->s_version.version;
+	dev_dbg(&oct->pdev->dev, "VF id:%d negotiated VF version:%d\n",
+		vf_id, oct->vf_info[vf_id].mbox_version);
+
+	rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
 }
 
 static void octep_pfvf_get_link_status(struct octep_device *oct, u32 vf_id,
@@ -167,6 +175,7 @@ int octep_setup_pfvf_mbox(struct octep_device *oct)
 			goto free_mbox;
 
 		memset(oct->mbox[ring], 0, sizeof(struct octep_mbox));
+		memset(&oct->vf_info[i], 0, sizeof(struct octep_pfvf_info));
 		mutex_init(&oct->mbox[ring]->lock);
 		INIT_WORK(&oct->mbox[ring]->wk.work, octep_pfvf_mbox_work);
 		oct->mbox[ring]->wk.ctxptr = oct->mbox[ring];
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.h b/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.h
index 34feeb559b0d..af4dcf5ef7f1 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.h
@@ -13,11 +13,15 @@
 #define OCTEON_SDP_16K_HW_FRS  16380UL
 #define OCTEON_SDP_64K_HW_FRS  65531UL
 
+/* When a new command is implemented,PF Mbox version should be bumped.
+ */
 enum octep_pfvf_mbox_version {
 	OCTEP_PFVF_MBOX_VERSION_V0,
 	OCTEP_PFVF_MBOX_VERSION_V1,
 };
 
+#define OCTEP_PFVF_MBOX_VERSION_CURRENT	OCTEP_PFVF_MBOX_VERSION_V1
+
 enum octep_pfvf_mbox_opcode {
 	OCTEP_PFVF_MBOX_CMD_VERSION,
 	OCTEP_PFVF_MBOX_CMD_SET_MTU,
@@ -30,7 +34,7 @@ enum octep_pfvf_mbox_opcode {
 	OCTEP_PFVF_MBOX_CMD_GET_LINK_STATUS,
 	OCTEP_PFVF_MBOX_CMD_GET_MTU,
 	OCTEP_PFVF_MBOX_CMD_DEV_REMOVE,
-	OCTEP_PFVF_MBOX_CMD_LAST,
+	OCTEP_PFVF_MBOX_CMD_MAX,
 };
 
 enum octep_pfvf_mbox_word_type {
@@ -79,7 +83,6 @@ enum octep_pfvf_link_autoneg {
 
 #define OCTEP_PFVF_MBOX_TIMEOUT_MS     500
 #define OCTEP_PFVF_MBOX_MAX_RETRIES    2
-#define OCTEP_PFVF_MBOX_VERSION        0
 #define OCTEP_PFVF_MBOX_MAX_DATA_SIZE  6
 #define OCTEP_PFVF_MBOX_MORE_FRAG_FLAG 1
 #define OCTEP_PFVF_MBOX_WRITE_WAIT_TIME msecs_to_jiffies(1)
-- 
2.25.1