RDMA/amso1100: Add driver for Ammasso 1100 RNIC

Add a driver for the Ammasso 1100 gigabit ethernet RNIC.

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

1 files changed, 174 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/amso1100/c2_mq.c b/drivers/infiniband/hw/amso1100/c2_mq.c
new file mode 100644
index 000000000000..b88a75592102
--- /dev/null
+++ b/drivers/infiniband/hw/amso1100/c2_mq.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2005 Ammasso, Inc. All rights reserved.
+ * Copyright (c) 2005 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.
+ */
+#include "c2.h"
+#include "c2_mq.h"
+
+void *c2_mq_alloc(struct c2_mq *q)
+{
+        BUG_ON(q->magic != C2_MQ_MAGIC);
+        BUG_ON(q->type != C2_MQ_ADAPTER_TARGET);
+
+        if (c2_mq_full(q)) {
+                return NULL;
+        } else {
+#ifdef DEBUG
+                struct c2wr_hdr *m =
+                    (struct c2wr_hdr *) (q->msg_pool.host + q->priv * q->msg_size);
+#ifdef CCMSGMAGIC
+                BUG_ON(m->magic != be32_to_cpu(~CCWR_MAGIC));
+                m->magic = cpu_to_be32(CCWR_MAGIC);
+#endif
+                return m;
+#else
+                return q->msg_pool.host + q->priv * q->msg_size;
+#endif
+        }
+}
+
+void c2_mq_produce(struct c2_mq *q)
+{
+        BUG_ON(q->magic != C2_MQ_MAGIC);
+        BUG_ON(q->type != C2_MQ_ADAPTER_TARGET);
+
+        if (!c2_mq_full(q)) {
+                q->priv = (q->priv + 1) % q->q_size;
+                q->hint_count++;
+                /* Update peer's offset. */
+                __raw_writew(cpu_to_be16(q->priv), &q->peer->shared);
+        }
+}
+
+void *c2_mq_consume(struct c2_mq *q)
+{
+        BUG_ON(q->magic != C2_MQ_MAGIC);
+        BUG_ON(q->type != C2_MQ_HOST_TARGET);
+
+        if (c2_mq_empty(q)) {
+                return NULL;
+        } else {
+#ifdef DEBUG
+                struct c2wr_hdr *m = (struct c2wr_hdr *)
+                    (q->msg_pool.host + q->priv * q->msg_size);
+#ifdef CCMSGMAGIC
+                BUG_ON(m->magic != be32_to_cpu(CCWR_MAGIC));
+#endif
+                return m;
+#else
+                return q->msg_pool.host + q->priv * q->msg_size;
+#endif
+        }
+}
+
+void c2_mq_free(struct c2_mq *q)
+{
+        BUG_ON(q->magic != C2_MQ_MAGIC);
+        BUG_ON(q->type != C2_MQ_HOST_TARGET);
+
+        if (!c2_mq_empty(q)) {
+
+#ifdef CCMSGMAGIC
+                {
+                        struct c2wr_hdr __iomem *m = (struct c2wr_hdr __iomem *)
+                            (q->msg_pool.adapter + q->priv * q->msg_size);
+                        __raw_writel(cpu_to_be32(~CCWR_MAGIC), &m->magic);
+                }
+#endif
+                q->priv = (q->priv + 1) % q->q_size;
+                /* Update peer's offset. */
+                __raw_writew(cpu_to_be16(q->priv), &q->peer->shared);
+        }
+}
+
+
+void c2_mq_lconsume(struct c2_mq *q, u32 wqe_count)
+{
+        BUG_ON(q->magic != C2_MQ_MAGIC);
+        BUG_ON(q->type != C2_MQ_ADAPTER_TARGET);
+
+        while (wqe_count--) {
+                BUG_ON(c2_mq_empty(q));
+                *q->shared = cpu_to_be16((be16_to_cpu(*q->shared)+1) % q->q_size);
+        }
+}
+
+#if 0
+u32 c2_mq_count(struct c2_mq *q)
+{
+        s32 count;
+
+        if (q->type == C2_MQ_HOST_TARGET)
+                count = be16_to_cpu(*q->shared) - q->priv;
+        else
+                count = q->priv - be16_to_cpu(*q->shared);
+
+        if (count < 0)
+                count += q->q_size;
+
+        return (u32) count;
+}
+#endif  /*  0  */
+
+void c2_mq_req_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
+                    u8 __iomem *pool_start, u16 __iomem *peer, u32 type)
+{
+        BUG_ON(!q->shared);
+
+        /* This code assumes the byte swapping has already been done! */
+        q->index = index;
+        q->q_size = q_size;
+        q->msg_size = msg_size;
+        q->msg_pool.adapter = pool_start;
+        q->peer = (struct c2_mq_shared __iomem *) peer;
+        q->magic = C2_MQ_MAGIC;
+        q->type = type;
+        q->priv = 0;
+        q->hint_count = 0;
+        return;
+}
+void c2_mq_rep_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
+                    u8 *pool_start, u16 __iomem *peer, u32 type)
+{
+        BUG_ON(!q->shared);
+
+        /* This code assumes the byte swapping has already been done! */
+        q->index = index;
+        q->q_size = q_size;
+        q->msg_size = msg_size;
+        q->msg_pool.host = pool_start;
+        q->peer = (struct c2_mq_shared __iomem *) peer;
+        q->magic = C2_MQ_MAGIC;
+        q->type = type;
+        q->priv = 0;
+        q->hint_count = 0;
+        return;
+}