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authorJakub Kicinski2019-06-05 23:11:34 +0200
committerDavid S. Miller2019-06-06 23:13:39 +0200
commitd3e4dfe060cc818262425b8606b502f79c3d9116 (patch)
tree327974a5e8a764a6aad74a91837db6b8b24a7830 /drivers/net/ethernet/netronome/nfp/ccm.h
parentnfp: parse the mailbox cmsg TLV (diff)
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nfp: add support for sending control messages via mailbox
FW may prefer to handle some communication via a mailbox or the vNIC may simply not have a control queue (VFs). Add a way of exchanging ccm-compatible messages via a mailbox. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/ccm.h')
-rw-r--r--drivers/net/ethernet/netronome/nfp/ccm.h44
1 files changed, 39 insertions, 5 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/ccm.h b/drivers/net/ethernet/netronome/nfp/ccm.h
index ac963b128203..c84be54abb4c 100644
--- a/drivers/net/ethernet/netronome/nfp/ccm.h
+++ b/drivers/net/ethernet/netronome/nfp/ccm.h
@@ -9,6 +9,7 @@
#include <linux/wait.h>
struct nfp_app;
+struct nfp_net;
/* Firmware ABI */
@@ -26,10 +27,18 @@ enum nfp_ccm_type {
#define NFP_CCM_ABI_VERSION 1
+#define NFP_CCM_TYPE_REPLY_BIT 7
+#define __NFP_CCM_REPLY(req) (BIT(NFP_CCM_TYPE_REPLY_BIT) | (req))
+
struct nfp_ccm_hdr {
- u8 type;
- u8 ver;
- __be16 tag;
+ union {
+ struct {
+ u8 type;
+ u8 ver;
+ __be16 tag;
+ };
+ __be32 raw;
+ };
};
static inline u8 nfp_ccm_get_type(struct sk_buff *skb)
@@ -41,15 +50,31 @@ static inline u8 nfp_ccm_get_type(struct sk_buff *skb)
return hdr->type;
}
-static inline unsigned int nfp_ccm_get_tag(struct sk_buff *skb)
+static inline __be16 __nfp_ccm_get_tag(struct sk_buff *skb)
{
struct nfp_ccm_hdr *hdr;
hdr = (struct nfp_ccm_hdr *)skb->data;
- return be16_to_cpu(hdr->tag);
+ return hdr->tag;
+}
+
+static inline unsigned int nfp_ccm_get_tag(struct sk_buff *skb)
+{
+ return be16_to_cpu(__nfp_ccm_get_tag(skb));
}
+#define NFP_NET_MBOX_TLV_TYPE GENMASK(31, 16)
+#define NFP_NET_MBOX_TLV_LEN GENMASK(15, 0)
+
+enum nfp_ccm_mbox_tlv_type {
+ NFP_NET_MBOX_TLV_TYPE_UNKNOWN = 0,
+ NFP_NET_MBOX_TLV_TYPE_END = 1,
+ NFP_NET_MBOX_TLV_TYPE_MSG = 2,
+ NFP_NET_MBOX_TLV_TYPE_MSG_NOSUP = 3,
+ NFP_NET_MBOX_TLV_TYPE_RESV = 4,
+};
+
/* Implementation */
/**
@@ -80,4 +105,13 @@ void nfp_ccm_rx(struct nfp_ccm *ccm, struct sk_buff *skb);
struct sk_buff *
nfp_ccm_communicate(struct nfp_ccm *ccm, struct sk_buff *skb,
enum nfp_ccm_type type, unsigned int reply_size);
+
+bool nfp_ccm_mbox_fits(struct nfp_net *nn, unsigned int size);
+struct sk_buff *
+nfp_ccm_mbox_alloc(struct nfp_net *nn, unsigned int req_size,
+ unsigned int reply_size, gfp_t flags);
+int nfp_ccm_mbox_communicate(struct nfp_net *nn, struct sk_buff *skb,
+ enum nfp_ccm_type type,
+ unsigned int reply_size,
+ unsigned int max_reply_size);
#endif