qed: Add VF->PF channel infrastructure

Communication between VF and PF is based on a dedicated HW channel;
VF will prepare a messge, and by signaling the HW the PF would get a
notification of that message existance. The PF would then copy the
message, process it and DMA an answer back to the VF as a response.

The messages themselves are TLV-based - allowing easier backward/forward
compatibility.

This patch adds the infrastructure of the channel on the PF side -
starting with the arrival of the notification and ending with DMAing
the response back to the VF.

It also adds a dummy-response as reference, as it only lays the
groundwork of the communication; it doesn't really add support of any
actual messages.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 53 insertions, 0 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/qed_sriov.h b/drivers/net/ethernet/qlogic/qed/qed_sriov.h
index 0ac561916e2c..112216812a12 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_sriov.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_sriov.h
@@ -50,6 +50,14 @@ struct qed_iov_vf_mbx {
 	dma_addr_t req_phys;
 	union pfvf_tlvs *reply_virt;
 	dma_addr_t reply_phys;
+
+	/* Address in VF where a pending message is located */
+	dma_addr_t pending_req;
+
+	u8 *offset;
+
+	/* saved VF request header */
+	struct vfpf_first_tlv first_tlv;
 };
 
 enum vf_state {
@@ -96,6 +104,14 @@ struct qed_pf_iov {
 	u32 bulletins_size;
 };
 
+enum qed_iov_wq_flag {
+	QED_IOV_WQ_MSG_FLAG,
+	QED_IOV_WQ_SET_UNICAST_FILTER_FLAG,
+	QED_IOV_WQ_BULLETIN_UPDATE_FLAG,
+	QED_IOV_WQ_STOP_WQ_FLAG,
+	QED_IOV_WQ_FLR_FLAG,
+};
+
 #ifdef CONFIG_QED_SRIOV
 /**
  * @brief - Given a VF index, return index of next [including that] active VF.
@@ -147,6 +163,22 @@ void qed_iov_free(struct qed_hwfn *p_hwfn);
  * @param cdev
  */
 void qed_iov_free_hw_info(struct qed_dev *cdev);
+
+/**
+ * @brief qed_sriov_eqe_event - handle async sriov event arrived on eqe.
+ *
+ * @param p_hwfn
+ * @param opcode
+ * @param echo
+ * @param data
+ */
+int qed_sriov_eqe_event(struct qed_hwfn *p_hwfn,
+			u8 opcode, __le16 echo, union event_ring_data *data);
+
+void qed_iov_wq_stop(struct qed_dev *cdev, bool schedule_first);
+int qed_iov_wq_start(struct qed_dev *cdev);
+
+void qed_schedule_iov(struct qed_hwfn *hwfn, enum qed_iov_wq_flag flag);
 #else
 static inline u16 qed_iov_get_next_active_vf(struct qed_hwfn *p_hwfn,
 					     u16 rel_vf_id)
@@ -175,6 +207,27 @@ static inline void qed_iov_free(struct qed_hwfn *p_hwfn)
 static inline void qed_iov_free_hw_info(struct qed_dev *cdev)
 {
 }
+
+static inline int qed_sriov_eqe_event(struct qed_hwfn *p_hwfn,
+				      u8 opcode,
+				      __le16 echo, union event_ring_data *data)
+{
+	return -EINVAL;
+}
+
+static inline void qed_iov_wq_stop(struct qed_dev *cdev, bool schedule_first)
+{
+}
+
+static inline int qed_iov_wq_start(struct qed_dev *cdev)
+{
+	return 0;
+}
+
+static inline void qed_schedule_iov(struct qed_hwfn *hwfn,
+				    enum qed_iov_wq_flag flag)
+{
+}
 #endif
 
 #define qed_for_each_vf(_p_hwfn, _i)			  \