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Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/ccm.h')
-rw-r--r--drivers/net/ethernet/netronome/nfp/ccm.h132
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/ccm.h b/drivers/net/ethernet/netronome/nfp/ccm.h
new file mode 100644
index 000000000..d81d450be
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/ccm.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/* Copyright (C) 2016-2019 Netronome Systems, Inc. */
+
+#ifndef NFP_CCM_H
+#define NFP_CCM_H 1
+
+#include <linux/bitmap.h>
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+
+struct nfp_app;
+struct nfp_net;
+
+/* Firmware ABI */
+
+enum nfp_ccm_type {
+ NFP_CCM_TYPE_BPF_MAP_ALLOC = 1,
+ NFP_CCM_TYPE_BPF_MAP_FREE = 2,
+ NFP_CCM_TYPE_BPF_MAP_LOOKUP = 3,
+ NFP_CCM_TYPE_BPF_MAP_UPDATE = 4,
+ NFP_CCM_TYPE_BPF_MAP_DELETE = 5,
+ NFP_CCM_TYPE_BPF_MAP_GETNEXT = 6,
+ NFP_CCM_TYPE_BPF_MAP_GETFIRST = 7,
+ NFP_CCM_TYPE_BPF_BPF_EVENT = 8,
+ NFP_CCM_TYPE_CRYPTO_RESET = 9,
+ NFP_CCM_TYPE_CRYPTO_ADD = 10,
+ NFP_CCM_TYPE_CRYPTO_DEL = 11,
+ NFP_CCM_TYPE_CRYPTO_UPDATE = 12,
+ NFP_CCM_TYPE_CRYPTO_RESYNC = 13,
+ __NFP_CCM_TYPE_MAX,
+};
+
+#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 {
+ union {
+ struct {
+ u8 type;
+ u8 ver;
+ __be16 tag;
+ };
+ __be32 raw;
+ };
+};
+
+static inline u8 nfp_ccm_get_type(struct sk_buff *skb)
+{
+ struct nfp_ccm_hdr *hdr;
+
+ hdr = (struct nfp_ccm_hdr *)skb->data;
+
+ return hdr->type;
+}
+
+static inline __be16 __nfp_ccm_get_tag(struct sk_buff *skb)
+{
+ struct nfp_ccm_hdr *hdr;
+
+ hdr = (struct nfp_ccm_hdr *)skb->data;
+
+ 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 */
+
+/**
+ * struct nfp_ccm - common control message handling
+ * @app: APP handle
+ *
+ * @tag_allocator: bitmap of control message tags in use
+ * @tag_alloc_next: next tag bit to allocate
+ * @tag_alloc_last: next tag bit to be freed
+ *
+ * @replies: received cmsg replies waiting to be consumed
+ * @wq: work queue for waiting for cmsg replies
+ */
+struct nfp_ccm {
+ struct nfp_app *app;
+
+ DECLARE_BITMAP(tag_allocator, U16_MAX + 1);
+ u16 tag_alloc_next;
+ u16 tag_alloc_last;
+
+ struct sk_buff_head replies;
+ wait_queue_head_t wq;
+};
+
+int nfp_ccm_init(struct nfp_ccm *ccm, struct nfp_app *app);
+void nfp_ccm_clean(struct nfp_ccm *ccm);
+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);
+
+int nfp_ccm_mbox_alloc(struct nfp_net *nn);
+void nfp_ccm_mbox_free(struct nfp_net *nn);
+int nfp_ccm_mbox_init(struct nfp_net *nn);
+void nfp_ccm_mbox_clean(struct nfp_net *nn);
+bool nfp_ccm_mbox_fits(struct nfp_net *nn, unsigned int size);
+struct sk_buff *
+nfp_ccm_mbox_msg_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, bool critical);
+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);
+int nfp_ccm_mbox_post(struct nfp_net *nn, struct sk_buff *skb,
+ enum nfp_ccm_type type, unsigned int max_reply_size);
+#endif