1 files changed, 241 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/pd.c b/drivers/net/ethernet/mellanox/mlx4/pd.c
new file mode 100644
index 000000000000..260ed259ce9b
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx4/pd.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. 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/errno.h>
+#include <linux/export.h>
+#include <linux/io-mapping.h>
+
+#include <asm/page.h>
+
+#include "mlx4.h"
+#include "icm.h"
+
+enum {
+        MLX4_NUM_RESERVED_UARS = 8
+};
+
+int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+
+        *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
+        if (*pdn == -1)
+                return -ENOMEM;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
+
+void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
+{
+        mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
+}
+EXPORT_SYMBOL_GPL(mlx4_pd_free);
+
+int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+
+        *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
+        if (*xrcdn == -1)
+                return -ENOMEM;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
+
+void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
+{
+        mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
+}
+EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
+
+int mlx4_init_pd_table(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+
+        return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
+                                (1 << 24) - 1, dev->caps.reserved_pds, 0);
+}
+
+void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
+{
+        mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
+}
+
+int mlx4_init_xrcd_table(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+
+        return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
+                                (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
+}
+
+void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
+{
+        mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
+}
+
+int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
+{
+        uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
+        if (uar->index == -1)
+                return -ENOMEM;
+
+        uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
+        uar->map = NULL;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
+
+void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
+{
+        mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
+}
+EXPORT_SYMBOL_GPL(mlx4_uar_free);
+
+int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_uar *uar;
+        int err = 0;
+        int idx;
+
+        if (!priv->bf_mapping)
+                return -ENOMEM;
+
+        mutex_lock(&priv->bf_mutex);
+        if (!list_empty(&priv->bf_list))
+                uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
+        else {
+                if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
+                        err = -ENOMEM;
+                        goto out;
+                }
+                uar = kmalloc(sizeof *uar, GFP_KERNEL);
+                if (!uar) {
+                        err = -ENOMEM;
+                        goto out;
+                }
+                err = mlx4_uar_alloc(dev, uar);
+                if (err)
+                        goto free_kmalloc;
+
+                uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
+                if (!uar->map) {
+                        err = -ENOMEM;
+                        goto free_uar;
+                }
+
+                uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
+                if (!uar->bf_map) {
+                        err = -ENOMEM;
+                        goto unamp_uar;
+                }
+                uar->free_bf_bmap = 0;
+                list_add(&uar->bf_list, &priv->bf_list);
+        }
+
+        bf->uar = uar;
+        idx = ffz(uar->free_bf_bmap);
+        uar->free_bf_bmap |= 1 << idx;
+        bf->uar = uar;
+        bf->offset = 0;
+        bf->buf_size = dev->caps.bf_reg_size / 2;
+        bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
+        if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
+                list_del_init(&uar->bf_list);
+
+        goto out;
+
+unamp_uar:
+        bf->uar = NULL;
+        iounmap(uar->map);
+
+free_uar:
+        mlx4_uar_free(dev, uar);
+
+free_kmalloc:
+        kfree(uar);
+
+out:
+        mutex_unlock(&priv->bf_mutex);
+        return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
+
+void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        int idx;
+
+        if (!bf->uar || !bf->uar->bf_map)
+                return;
+
+        mutex_lock(&priv->bf_mutex);
+        idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
+        bf->uar->free_bf_bmap &= ~(1 << idx);
+        if (!bf->uar->free_bf_bmap) {
+                if (!list_empty(&bf->uar->bf_list))
+                        list_del(&bf->uar->bf_list);
+
+                io_mapping_unmap(bf->uar->bf_map);
+                iounmap(bf->uar->map);
+                mlx4_uar_free(dev, bf->uar);
+                kfree(bf->uar);
+        } else if (list_empty(&bf->uar->bf_list))
+                list_add(&bf->uar->bf_list, &priv->bf_list);
+
+        mutex_unlock(&priv->bf_mutex);
+}
+EXPORT_SYMBOL_GPL(mlx4_bf_free);
+
+int mlx4_init_uar_table(struct mlx4_dev *dev)
+{
+        if (dev->caps.num_uars <= 128) {
+                mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
+                         dev->caps.num_uars);
+                mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
+                return -ENODEV;
+        }
+
+        return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
+                                dev->caps.num_uars, dev->caps.num_uars - 1,
+                                max(128, dev->caps.reserved_uars), 0);
+}
+
+void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
+{
+        mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
+}