RDMA/cxgb3: Add driver for Chelsio T3 RNIC

Add an RDMA/iWARP driver for the Chelsio T3 1GbE and 10GbE adapters.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 223 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/cxgb3/iwch_cm.h b/drivers/infiniband/hw/cxgb3/iwch_cm.h
new file mode 100644
index 00000000000..7c810d90427
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb3/iwch_cm.h
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
+ * Copyright (c) 2006 Open Grid Computing, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _IWCH_CM_H_
+#define _IWCH_CM_H_
+
+#include <linux/inet.h>
+#include <linux/wait.h>
+#include <linux/spinlock.h>
+#include <linux/kref.h>
+
+#include <rdma/ib_verbs.h>
+#include <rdma/iw_cm.h>
+
+#include "cxgb3_offload.h"
+#include "iwch_provider.h"
+
+#define MPA_KEY_REQ "MPA ID Req Frame"
+#define MPA_KEY_REP "MPA ID Rep Frame"
+
+#define MPA_MAX_PRIVATE_DATA    256
+#define MPA_REV         0       /* XXX - amso1100 uses rev 0 ! */
+#define MPA_REJECT              0x20
+#define MPA_CRC                 0x40
+#define MPA_MARKERS             0x80
+#define MPA_FLAGS_MASK          0xE0
+
+#define put_ep(ep) { \
+        PDBG("put_ep (via %s:%u) ep %p refcnt %d\n", __FUNCTION__, __LINE__,  \
+             ep, atomic_read(&((ep)->kref.refcount))); \
+        kref_put(&((ep)->kref), __free_ep); \
+}
+
+#define get_ep(ep) { \
+        PDBG("get_ep (via %s:%u) ep %p, refcnt %d\n", __FUNCTION__, __LINE__, \
+             ep, atomic_read(&((ep)->kref.refcount))); \
+        kref_get(&((ep)->kref));  \
+}
+
+struct mpa_message {
+        u8 key[16];
+        u8 flags;
+        u8 revision;
+        __be16 private_data_size;
+        u8 private_data[0];
+};
+
+struct terminate_message {
+        u8 layer_etype;
+        u8 ecode;
+        __be16 hdrct_rsvd;
+        u8 len_hdrs[0];
+};
+
+#define TERM_MAX_LENGTH (sizeof(struct terminate_message) + 2 + 18 + 28)
+
+enum iwch_layers_types {
+        LAYER_RDMAP             = 0x00,
+        LAYER_DDP               = 0x10,
+        LAYER_MPA               = 0x20,
+        RDMAP_LOCAL_CATA        = 0x00,
+        RDMAP_REMOTE_PROT       = 0x01,
+        RDMAP_REMOTE_OP         = 0x02,
+        DDP_LOCAL_CATA          = 0x00,
+        DDP_TAGGED_ERR          = 0x01,
+        DDP_UNTAGGED_ERR        = 0x02,
+        DDP_LLP                 = 0x03
+};
+
+enum iwch_rdma_ecodes {
+        RDMAP_INV_STAG          = 0x00,
+        RDMAP_BASE_BOUNDS       = 0x01,
+        RDMAP_ACC_VIOL          = 0x02,
+        RDMAP_STAG_NOT_ASSOC    = 0x03,
+        RDMAP_TO_WRAP           = 0x04,
+        RDMAP_INV_VERS          = 0x05,
+        RDMAP_INV_OPCODE        = 0x06,
+        RDMAP_STREAM_CATA       = 0x07,
+        RDMAP_GLOBAL_CATA       = 0x08,
+        RDMAP_CANT_INV_STAG     = 0x09,
+        RDMAP_UNSPECIFIED       = 0xff
+};
+
+enum iwch_ddp_ecodes {
+        DDPT_INV_STAG           = 0x00,
+        DDPT_BASE_BOUNDS        = 0x01,
+        DDPT_STAG_NOT_ASSOC     = 0x02,
+        DDPT_TO_WRAP            = 0x03,
+        DDPT_INV_VERS           = 0x04,
+        DDPU_INV_QN             = 0x01,
+        DDPU_INV_MSN_NOBUF      = 0x02,
+        DDPU_INV_MSN_RANGE      = 0x03,
+        DDPU_INV_MO             = 0x04,
+        DDPU_MSG_TOOBIG         = 0x05,
+        DDPU_INV_VERS           = 0x06
+};
+
+enum iwch_mpa_ecodes {
+        MPA_CRC_ERR             = 0x02,
+        MPA_MARKER_ERR          = 0x03
+};
+
+enum iwch_ep_state {
+        IDLE = 0,
+        LISTEN,
+        CONNECTING,
+        MPA_REQ_WAIT,
+        MPA_REQ_SENT,
+        MPA_REQ_RCVD,
+        MPA_REP_SENT,
+        FPDU_MODE,
+        ABORTING,
+        CLOSING,
+        MORIBUND,
+        DEAD,
+};
+
+struct iwch_ep_common {
+        struct iw_cm_id *cm_id;
+        struct iwch_qp *qp;
+        struct t3cdev *tdev;
+        enum iwch_ep_state state;
+        struct kref kref;
+        spinlock_t lock;
+        struct sockaddr_in local_addr;
+        struct sockaddr_in remote_addr;
+        wait_queue_head_t waitq;
+        int rpl_done;
+        int rpl_err;
+};
+
+struct iwch_listen_ep {
+        struct iwch_ep_common com;
+        unsigned int stid;
+        int backlog;
+};
+
+struct iwch_ep {
+        struct iwch_ep_common com;
+        struct iwch_ep *parent_ep;
+        struct timer_list timer;
+        unsigned int atid;
+        u32 hwtid;
+        u32 snd_seq;
+        struct l2t_entry *l2t;
+        struct dst_entry *dst;
+        struct sk_buff *mpa_skb;
+        struct iwch_mpa_attributes mpa_attr;
+        unsigned int mpa_pkt_len;
+        u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
+        u8 tos;
+        u16 emss;
+        u16 plen;
+        u32 ird;
+        u32 ord;
+};
+
+static inline struct iwch_ep *to_ep(struct iw_cm_id *cm_id)
+{
+        return cm_id->provider_data;
+}
+
+static inline struct iwch_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
+{
+        return cm_id->provider_data;
+}
+
+static inline int compute_wscale(int win)
+{
+        int wscale = 0;
+
+        while (wscale < 14 && (65535<<wscale) < win)
+                wscale++;
+        return wscale;
+}
+
+/* CM prototypes */
+
+int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
+int iwch_create_listen(struct iw_cm_id *cm_id, int backlog);
+int iwch_destroy_listen(struct iw_cm_id *cm_id);
+int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
+int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
+int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp);
+int iwch_quiesce_tid(struct iwch_ep *ep);
+int iwch_resume_tid(struct iwch_ep *ep);
+void __free_ep(struct kref *kref);
+void iwch_rearp(struct iwch_ep *ep);
+int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, struct l2t_entry *l2t);
+
+int __init iwch_cm_init(void);
+void __exit iwch_cm_term(void);
+
+#endif                          /* _IWCH_CM_H_ */