IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters

Add an InfiniBand driver for Mellanox ConnectX adapters.  Because
these adapters can also be used as ethernet NICs and Fibre Channel 
HBAs, the driver is split into two modules: 
 
  mlx4_core: Handles low-level things like device initialization and 
    processing firmware commands.  Also controls resource allocation 
    so that the InfiniBand, ethernet and FC functions can share a 
    device without stepping on each other. 
 
  mlx4_ib: Handles InfiniBand-specific things; plugs into the 
    InfiniBand midlayer. 

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 123 insertions, 0 deletions

diff --git a/include/linux/mlx4/cq.h b/include/linux/mlx4/cq.h
new file mode 100644
index 000000000000..0181e0a57cbf
--- /dev/null
+++ b/include/linux/mlx4/cq.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, 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 MLX4_CQ_H
+#define MLX4_CQ_H
+
+#include <linux/types.h>
+
+#include <linux/mlx4/device.h>
+#include <linux/mlx4/doorbell.h>
+
+struct mlx4_cqe {
+        __be32                  my_qpn;
+        __be32                  immed_rss_invalid;
+        __be32                  g_mlpath_rqpn;
+        u8                      sl;
+        u8                      reserved1;
+        __be16                  rlid;
+        u32                     reserved2;
+        __be32                  byte_cnt;
+        __be16                  wqe_index;
+        __be16                  checksum;
+        u8                      reserved3[3];
+        u8                      owner_sr_opcode;
+};
+
+struct mlx4_err_cqe {
+        __be32                  my_qpn;
+        u32                     reserved1[5];
+        __be16                  wqe_index;
+        u8                      vendor_err_syndrome;
+        u8                      syndrome;
+        u8                      reserved2[3];
+        u8                      owner_sr_opcode;
+};
+
+enum {
+        MLX4_CQE_OWNER_MASK     = 0x80,
+        MLX4_CQE_IS_SEND_MASK   = 0x40,
+        MLX4_CQE_OPCODE_MASK    = 0x1f
+};
+
+enum {
+        MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR              = 0x01,
+        MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR               = 0x02,
+        MLX4_CQE_SYNDROME_LOCAL_PROT_ERR                = 0x04,
+        MLX4_CQE_SYNDROME_WR_FLUSH_ERR                  = 0x05,
+        MLX4_CQE_SYNDROME_MW_BIND_ERR                   = 0x06,
+        MLX4_CQE_SYNDROME_BAD_RESP_ERR                  = 0x10,
+        MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR              = 0x11,
+        MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR          = 0x12,
+        MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR             = 0x13,
+        MLX4_CQE_SYNDROME_REMOTE_OP_ERR                 = 0x14,
+        MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR       = 0x15,
+        MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR             = 0x16,
+        MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR            = 0x22,
+};
+
+static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
+                               void __iomem *uar_page,
+                               spinlock_t *doorbell_lock)
+{
+        __be32 doorbell[2];
+        u32 sn;
+        u32 ci;
+
+        sn = cq->arm_sn & 3;
+        ci = cq->cons_index & 0xffffff;
+
+        *cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
+
+        /*
+         * Make sure that the doorbell record in host memory is
+         * written before ringing the doorbell via PCI MMIO.
+         */
+        wmb();
+
+        doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);
+        doorbell[1] = cpu_to_be32(ci);
+
+        mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);
+}
+
+static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)
+{
+        *cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
+}
+
+enum {
+        MLX4_CQ_DB_REQ_NOT_SOL          = 1 << 24,
+        MLX4_CQ_DB_REQ_NOT              = 2 << 24
+};
+
+#endif /* MLX4_CQ_H */