mlx5: Add driver for Mellanox Connect-IB adapters

The driver is comprised of two kernel modules: mlx5_ib and mlx5_core.
This partitioning resembles what we have for mlx4, except that mlx5_ib
is the pci device driver and not mlx5_core.

mlx5_core is essentially a library that provides general functionality
that is intended to be used by other Mellanox devices that will be
introduced in the future.  mlx5_ib has a similar role as any hardware
device under drivers/infiniband/hw.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>

[ Merge in coccinelle fixes from Fengguang Wu <fengguang.wu@intel.com>.
  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>

7 files changed, 2465 insertions, 0 deletions

diff --git a/include/linux/mlx5/cmd.h b/include/linux/mlx5/cmd.h
new file mode 100644
index 000000000000..2826a4b6071e
--- /dev/null
+++ b/include/linux/mlx5/cmd.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2013, Mellanox Technologies 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 MLX5_CMD_H
+#define MLX5_CMD_H
+
+#include <linux/types.h>
+
+struct manage_pages_layout {
+        u64     ptr;
+        u32     reserved;
+        u16     num_entries;
+        u16     func_id;
+};
+
+
+struct mlx5_cmd_alloc_uar_imm_out {
+        u32     rsvd[3];
+        u32     uarn;
+};
+
+#endif /* MLX5_CMD_H */
diff --git a/include/linux/mlx5/cq.h b/include/linux/mlx5/cq.h
new file mode 100644
index 000000000000..3db67f73d96d
--- /dev/null
+++ b/include/linux/mlx5/cq.h
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2013, Mellanox Technologies 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 MLX5_CORE_CQ_H
+#define MLX5_CORE_CQ_H
+
+#include <rdma/ib_verbs.h>
+#include <linux/mlx5/driver.h>
+
+
+struct mlx5_core_cq {
+        u32                     cqn;
+        int                     cqe_sz;
+        __be32                 *set_ci_db;
+        __be32                 *arm_db;
+        atomic_t                refcount;
+        struct completion       free;
+        unsigned                vector;
+        int                     irqn;
+        void (*comp)            (struct mlx5_core_cq *);
+        void (*event)           (struct mlx5_core_cq *, enum mlx5_event);
+        struct mlx5_uar        *uar;
+        u32                     cons_index;
+        unsigned                arm_sn;
+        struct mlx5_rsc_debug   *dbg;
+        int                     pid;
+};
+
+
+enum {
+        MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR              = 0x01,
+        MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR               = 0x02,
+        MLX5_CQE_SYNDROME_LOCAL_PROT_ERR                = 0x04,
+        MLX5_CQE_SYNDROME_WR_FLUSH_ERR                  = 0x05,
+        MLX5_CQE_SYNDROME_MW_BIND_ERR                   = 0x06,
+        MLX5_CQE_SYNDROME_BAD_RESP_ERR                  = 0x10,
+        MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR              = 0x11,
+        MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR          = 0x12,
+        MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR             = 0x13,
+        MLX5_CQE_SYNDROME_REMOTE_OP_ERR                 = 0x14,
+        MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR       = 0x15,
+        MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR             = 0x16,
+        MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR            = 0x22,
+};
+
+enum {
+        MLX5_CQE_OWNER_MASK     = 1,
+        MLX5_CQE_REQ            = 0,
+        MLX5_CQE_RESP_WR_IMM    = 1,
+        MLX5_CQE_RESP_SEND      = 2,
+        MLX5_CQE_RESP_SEND_IMM  = 3,
+        MLX5_CQE_RESP_SEND_INV  = 4,
+        MLX5_CQE_RESIZE_CQ      = 0xff, /* TBD */
+        MLX5_CQE_REQ_ERR        = 13,
+        MLX5_CQE_RESP_ERR       = 14,
+};
+
+enum {
+        MLX5_CQ_MODIFY_RESEIZE = 0,
+        MLX5_CQ_MODIFY_MODER = 1,
+        MLX5_CQ_MODIFY_MAPPING = 2,
+};
+
+struct mlx5_cq_modify_params {
+        int     type;
+        union {
+                struct {
+                        u32     page_offset;
+                        u8      log_cq_size;
+                } resize;
+
+                struct {
+                } moder;
+
+                struct {
+                } mapping;
+        } params;
+};
+
+enum {
+        CQE_SIZE_64 = 0,
+        CQE_SIZE_128 = 1,
+};
+
+static inline int cqe_sz_to_mlx_sz(u8 size)
+{
+        return size == 64 ? CQE_SIZE_64 : CQE_SIZE_128;
+}
+
+static inline void mlx5_cq_set_ci(struct mlx5_core_cq *cq)
+{
+        *cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
+}
+
+enum {
+        MLX5_CQ_DB_REQ_NOT_SOL          = 1 << 24,
+        MLX5_CQ_DB_REQ_NOT              = 0 << 24
+};
+
+static inline void mlx5_cq_arm(struct mlx5_core_cq *cq, u32 cmd,
+                               void __iomem *uar_page,
+                               spinlock_t *doorbell_lock)
+{
+        __be32 doorbell[2];
+