[dpdk-dev] [PATCH v2 02/20] net/ixgbe/base: add support to clear VFMBMEM

[Guinan Sun <guinanx.sun@intel.com>]

Add method to clear VFMBMEM memory. 
Clearing VFMBMEM memory is required from PF after
receiving Virtual Function Level Reset request (VFLR).

Signed-off-by: Piotr Pietruszewski <piotr.pietruszewski@intel.com>
Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
---
 drivers/net/ixgbe/base/ixgbe_mbx.c  | 43 +++++++++++++++++++++++++++++
 drivers/net/ixgbe/base/ixgbe_mbx.h  |  1 +
 drivers/net/ixgbe/base/ixgbe_type.h |  1 +
 3 files changed, 45 insertions(+)

diff --git a/drivers/net/ixgbe/base/ixgbe_mbx.c b/drivers/net/ixgbe/base/ixgbe_mbx.c
index 13bdb5f68..3d1c1669f 100644
--- a/drivers/net/ixgbe/base/ixgbe_mbx.c
+++ b/drivers/net/ixgbe/base/ixgbe_mbx.c
@@ -117,6 +117,26 @@ s32 ixgbe_check_for_rst(struct ixgbe_hw *hw, u16 mbx_id)
 	return ret_val;
 }
 
+/**
+ *  ixgbe_clear_mbx - Clear Mailbox Memory
+ *  @hw: pointer to the HW structure
+ *  @vf_number: id of mailbox to write
+ *
+ *  Set VFMBMEM of given VF to 0x0.
+ **/
+s32 ixgbe_clear_mbx(struct ixgbe_hw *hw, u16 vf_number)
+{
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
+	s32 ret_val = IXGBE_SUCCESS;
+
+	DEBUGFUNC("ixgbe_clear_mbx");
+
+	if (mbx->ops.clear)
+		ret_val = mbx->ops.clear(hw, vf_number);
+
+	return ret_val;
+}
+
 /**
  *  ixgbe_poll_for_msg - Wait for message notification
  *  @hw: pointer to the HW structure
@@ -486,6 +506,7 @@ void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw)
 	mbx->ops.check_for_msg = ixgbe_check_for_msg_vf;
 	mbx->ops.check_for_ack = ixgbe_check_for_ack_vf;
 	mbx->ops.check_for_rst = ixgbe_check_for_rst_vf;
+	mbx->ops.clear = NULL;
 
 	mbx->stats.msgs_tx = 0;
 	mbx->stats.msgs_rx = 0;
@@ -702,6 +723,27 @@ STATIC s32 ixgbe_read_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size,
 	return ret_val;
 }
 
+/**
+ *  ixgbe_clear_mbx_pf - Clear Mailbox Memory
+ *  @hw: pointer to the HW structure
+ *  @vf_number: the VF index
+ *
+ *  Set VFMBMEM of given VF to 0x0.
+ **/
+STATIC s32 ixgbe_clear_mbx_pf(struct ixgbe_hw *hw, u16 vf_number)
+{
+	u16 mbx_size = hw->mbx.size;
+	u16 i;
+
+	if (vf_number > 63)
+		return IXGBE_ERR_PARAM;
+
+	for (i = 0; i < mbx_size; ++i)
+		IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, 0x0);
+
+	return IXGBE_SUCCESS;
+}
+
 /**
  *  ixgbe_init_mbx_params_pf - set initial values for pf mailbox
  *  @hw: pointer to the HW structure
@@ -731,6 +773,7 @@ void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw)
 	mbx->ops.check_for_msg = ixgbe_check_for_msg_pf;
 	mbx->ops.check_for_ack = ixgbe_check_for_ack_pf;
 	mbx->ops.check_for_rst = ixgbe_check_for_rst_pf;
+	mbx->ops.clear = ixgbe_clear_mbx_pf;
 
 	mbx->stats.msgs_tx = 0;
 	mbx->stats.msgs_rx = 0;
diff --git a/drivers/net/ixgbe/base/ixgbe_mbx.h b/drivers/net/ixgbe/base/ixgbe_mbx.h
index 1a45e49c2..962a44705 100644
--- a/drivers/net/ixgbe/base/ixgbe_mbx.h
+++ b/drivers/net/ixgbe/base/ixgbe_mbx.h
@@ -129,6 +129,7 @@ s32 ixgbe_write_posted_mbx(struct ixgbe_hw *, u32 *, u16, u16);
 s32 ixgbe_check_for_msg(struct ixgbe_hw *, u16);
 s32 ixgbe_check_for_ack(struct ixgbe_hw *, u16);
 s32 ixgbe_check_for_rst(struct ixgbe_hw *, u16);
+s32 ixgbe_clear_mbx(struct ixgbe_hw *hw, u16 vf_number);
 void ixgbe_init_mbx_ops_generic(struct ixgbe_hw *hw);
 void ixgbe_init_mbx_params_vf(struct ixgbe_hw *);
 void ixgbe_init_mbx_params_pf(struct ixgbe_hw *);
diff --git a/drivers/net/ixgbe/base/ixgbe_type.h b/drivers/net/ixgbe/base/ixgbe_type.h
index 6c8c93946..0470b1dfc 100644
--- a/drivers/net/ixgbe/base/ixgbe_type.h
+++ b/drivers/net/ixgbe/base/ixgbe_type.h
@@ -4156,6 +4156,7 @@ struct ixgbe_mbx_operations {
 	s32  (*check_for_msg)(struct ixgbe_hw *, u16);
 	s32  (*check_for_ack)(struct ixgbe_hw *, u16);
 	s32  (*check_for_rst)(struct ixgbe_hw *, u16);
+	s32  (*clear)(struct ixgbe_hw *hw, u16 vf_number);
 };
 
 struct ixgbe_mbx_stats {
-- 
2.17.1