1 files changed, 280 insertions, 0 deletions

diff --git a/drivers/net/mlx4/qp.c b/drivers/net/mlx4/qp.c
new file mode 100644
index 000000000000..7f8b7d55b6e1
--- /dev/null
+++ b/drivers/net/mlx4/qp.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2004 Voltaire, 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 <linux/init.h>
+
+#include <linux/mlx4/cmd.h>
+#include <linux/mlx4/qp.h>
+
+#include "mlx4.h"
+#include "icm.h"
+
+void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
+{
+        struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+        struct mlx4_qp *qp;
+
+        spin_lock(&qp_table->lock);
+
+        qp = __mlx4_qp_lookup(dev, qpn);
+        if (qp)
+                atomic_inc(&qp->refcount);
+
+        spin_unlock(&qp_table->lock);
+
+        if (!qp) {
+                mlx4_warn(dev, "Async event for bogus QP %08x\n", qpn);
+                return;
+        }
+
+        qp->event(qp, event_type);
+
+        if (atomic_dec_and_test(&qp->refcount))
+                complete(&qp->free);
+}
+
+int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
+                   enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
+                   struct mlx4_qp_context *context, enum mlx4_qp_optpar optpar,
+                   int sqd_event, struct mlx4_qp *qp)
+{
+        static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
+                [MLX4_QP_STATE_RST] = {
+                        [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
+                        [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
+                        [MLX4_QP_STATE_INIT]    = MLX4_CMD_RST2INIT_QP,
+                },
+                [MLX4_QP_STATE_INIT]  = {
+                        [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
+                        [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
+                        [MLX4_QP_STATE_INIT]    = MLX4_CMD_INIT2INIT_QP,
+                        [MLX4_QP_STATE_RTR]     = MLX4_CMD_INIT2RTR_QP,
+                },
+                [MLX4_QP_STATE_RTR]   = {
+                        [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
+                        [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
+                        [MLX4_QP_STATE_RTS]     = MLX4_CMD_RTR2RTS_QP,
+                },
+                [MLX4_QP_STATE_RTS]   = {
+                        [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
+                        [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
+                        [MLX4_QP_STATE_RTS]     = MLX4_CMD_RTS2RTS_QP,
+                        [MLX4_QP_STATE_SQD]     = MLX4_CMD_RTS2SQD_QP,
+                },
+                [MLX4_QP_STATE_SQD] = {
+                        [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
+                        [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
+                        [MLX4_QP_STATE_RTS]     = MLX4_CMD_SQD2RTS_QP,
+                        [MLX4_QP_STATE_SQD]     = MLX4_CMD_SQD2SQD_QP,
+                },
+                [MLX4_QP_STATE_SQER] = {
+                        [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
+                        [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
+                        [MLX4_QP_STATE_RTS]     = MLX4_CMD_SQERR2RTS_QP,
+                },
+                [MLX4_QP_STATE_ERR] = {
+                        [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
+                        [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
+                }
+        };
+
+        struct mlx4_cmd_mailbox *mailbox;
+        int ret = 0;
+
+        if (cur_state < 0 || cur_state >= MLX4_QP_NUM_STATE ||
+            new_state < 0 || cur_state >= MLX4_QP_NUM_STATE ||
+            !op[cur_state][new_state])
+                return -EINVAL;
+
+        if (op[cur_state][new_state] == MLX4_CMD_2RST_QP)
+                return mlx4_cmd(dev, 0, qp->qpn, 2,
+                                MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A);
+
+        mailbox = mlx4_alloc_cmd_mailbox(dev);
+        if (IS_ERR(mailbox))
+                return PTR_ERR(mailbox);
+
+        if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
+                u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
+                context->mtt_base_addr_h = mtt_addr >> 32;
+                context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
+                context->log_page_size   = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
+        }
+
+        *(__be32 *) mailbox->buf = cpu_to_be32(optpar);
+        memcpy(mailbox->buf + 8, context, sizeof *context);
+
+        ((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
+                cpu_to_be32(qp->qpn);
+
+        ret = mlx4_cmd(dev, mailbox->dma, qp->qpn | (!!sqd_event << 31),
+                       new_state == MLX4_QP_STATE_RST ? 2 : 0,
+                       op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C);
+
+        mlx4_free_cmd_mailbox(dev, mailbox);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_modify);
+
+int mlx4_qp_alloc(struct mlx4_dev *dev, int sqpn, struct mlx4_qp *qp)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_qp_table *qp_table = &priv->qp_table;
+        int err;
+
+        if (sqpn)
+                qp->qpn = sqpn;
+        else {
+                qp->qpn = mlx4_bitmap_alloc(&qp_table->bitmap);
+                if (qp->qpn == -1)
+                        return -ENOMEM;
+        }
+
+        err = mlx4_table_get(dev, &qp_table->qp_table, qp->qpn);
+        if (err)
+                goto err_out;
+
+        err = mlx4_table_get(dev, &qp_table->auxc_table, qp->qpn);
+        if (err)
+                goto err_put_qp;
+
+        err = mlx4_table_get(dev, &qp_table->altc_table, qp->qpn);
+        if (err)
+                goto err_put_auxc;
+
+        err = mlx4_table_get(dev, &qp_table->rdmarc_table, qp->qpn);
+        if (err)
+                goto err_put_altc;
+
+        err = mlx4_table_get(dev, &qp_table->cmpt_table, qp->qpn);
+        if (err)
+                goto err_put_rdmarc;
+
+        spin_lock_irq(&qp_table->lock);
+        err = radix_tree_insert(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1), qp);
+        spin_unlock_irq(&qp_table->lock);
+        if (err)
+                goto err_put_cmpt;
+
+        atomic_set(&qp->refcount, 1);
+        init_completion(&qp->free);
+
+        return 0;
+
+err_put_cmpt:
+        mlx4_table_put(dev, &qp_table->cmpt_table, qp->qpn);
+
+err_put_rdmarc:
+        mlx4_table_put(dev, &qp_table->rdmarc_table, qp->qpn);
+
+err_put_altc:
+        mlx4_table_put(dev, &qp_table->altc_table, qp->qpn);
+
+err_put_auxc:
+        mlx4_table_put(dev, &qp_table->auxc_table, qp->qpn);
+
+err_put_qp:
+        mlx4_table_put(dev, &qp_table->qp_table, qp->qpn);
+
+err_out:
+        if (!sqpn)
+                mlx4_bitmap_free(&qp_table->bitmap, qp->qpn);
+
+        return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
+
+void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
+{
+        struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+        unsigned long flags;
+
+        spin_lock_irqsave(&qp_table->lock, flags);
+        radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
+        spin_unlock_irqrestore(&qp_table->lock, flags);
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_remove);
+
+void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
+{
+        struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+
+        if (atomic_dec_and_test(&qp->refcount))
+                complete(&qp->free);
+        wait_for_completion(&qp->free);
+
+        mlx4_table_put(dev, &qp_table->cmpt_table, qp->qpn);
+        mlx4_table_put(dev, &qp_table->rdmarc_table, qp->qpn);
+        mlx4_table_put(dev, &qp_table->altc_table, qp->qpn);
+        mlx4_table_put(dev, &qp_table->auxc_table, qp->qpn);
+        mlx4_table_put(dev, &qp_table->qp_table, qp->qpn);
+
+        mlx4_bitmap_free(&qp_table->bitmap, qp->qpn);
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_free);
+
+static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
+{
+        return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP,
+                        MLX4_CMD_TIME_CLASS_B);
+}
+
+int __devinit mlx4_init_qp_table(struct mlx4_dev *dev)
+{
+        struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+        int err;
+
+        spin_lock_init(&qp_table->lock);
+        INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
+
+        /*
+         * We reserve 2 extra QPs per port for the special QPs.  The
+         * block of special QPs must be aligned to a multiple of 8, so
+         * round up.
+         */
+        dev->caps.sqp_start = ALIGN(dev->caps.reserved_qps, 8);
+        err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps,
+                               (1 << 24) - 1, dev->caps.sqp_start + 8);
+        if (err)
+                return err;
+
+        return mlx4_CONF_SPECIAL_QP(dev, dev->caps.sqp_start);
+}
+
+void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
+{
+        mlx4_CONF_SPECIAL_QP(dev, 0);
+        mlx4_bitmap_cleanup(&mlx4_priv(dev)->qp_table.bitmap);
+}