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>
diff --git a/drivers/net/ethernet/qlogic/qed/qed_vf.h b/drivers/net/ethernet/qlogic/qed/qed_vf.h
index 52cfa48..f0d8de2 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_vf.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_vf.h
@@ -9,16 +9,62 @@
#ifndef _QED_VF_H
#define _QED_VF_H
+enum {
+ PFVF_STATUS_WAITING,
+ PFVF_STATUS_SUCCESS,
+ PFVF_STATUS_FAILURE,
+ PFVF_STATUS_NOT_SUPPORTED,
+ PFVF_STATUS_NO_RESOURCE,
+ PFVF_STATUS_FORCED,
+};
+
+/* vf pf channel tlvs */
+/* general tlv header (used for both vf->pf request and pf->vf response) */
+struct channel_tlv {
+ u16 type;
+ u16 length;
+};
+
+/* header of first vf->pf tlv carries the offset used to calculate reponse
+ * buffer address
+ */
+struct vfpf_first_tlv {
+ struct channel_tlv tl;
+ u32 padding;
+ u64 reply_address;
+};
+
+/* header of pf->vf tlvs, carries the status of handling the request */
+struct pfvf_tlv {
+ struct channel_tlv tl;
+ u8 status;
+ u8 padding[3];
+};
+
+/* response tlv used for most tlvs */
+struct pfvf_def_resp_tlv {
+ struct pfvf_tlv hdr;
+};
+
+/* used to terminate and pad a tlv list */
+struct channel_list_end_tlv {
+ struct channel_tlv tl;
+ u8 padding[4];
+};
+
#define TLV_BUFFER_SIZE 1024
struct tlv_buffer_size {
u8 tlv_buffer[TLV_BUFFER_SIZE];
};
union vfpf_tlvs {
+ struct vfpf_first_tlv first_tlv;
+ struct channel_list_end_tlv list_end;
struct tlv_buffer_size tlv_buf_size;
};
union pfvf_tlvs {
+ struct pfvf_def_resp_tlv default_resp;
struct tlv_buffer_size tlv_buf_size;
};
@@ -38,4 +84,10 @@
u32 size;
};
+enum {
+ CHANNEL_TLV_NONE, /* ends tlv sequence */
+ CHANNEL_TLV_LIST_END,
+ CHANNEL_TLV_MAX
+};
+
#endif