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, 5 insertions, 0 deletions

diff --git a/include/linux/qed/common_hsi.h b/include/linux/qed/common_hsi.h
index 53ecb37ae563..8914d271ba73 100644
--- a/include/linux/qed/common_hsi.h
+++ b/include/linux/qed/common_hsi.h
@@ -327,9 +327,14 @@ struct regpair {
 	__le32	hi;
 };
 
+struct vf_pf_channel_eqe_data {
+	struct regpair msg_addr;
+};
+
 /* Event Data Union */
 union event_ring_data {
 	u8				bytes[8];
+	struct vf_pf_channel_eqe_data	vf_pf_channel;
 	struct async_data		async_info;
 };